commit 0e15f670a1840b1e5ec7d26f63234651a45014aa Author: markm Date: Thu Sep 4 06:11:16 1997 +0000 This commit was generated by cvs2svn to compensate for changes in r29088, which included commits to RCS files with non-trunk default branches. git-svn-id: http://svn0.us-east.freebsd.org/base/head/contrib/telnet@29089 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f diff --git a/arpa/telnet.h b/arpa/telnet.h new file mode 100644 index 0000000..10155a8 --- /dev/null +++ b/arpa/telnet.h @@ -0,0 +1,320 @@ +/* + * Copyright (c) 1983, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)telnet.h 8.2 (Berkeley) 12/15/93 + */ + +#ifndef _TELNET_H_ +#define _TELNET_H_ + +/* + * Definitions for the TELNET protocol. + */ +#define IAC 255 /* interpret as command: */ +#define DONT 254 /* you are not to use option */ +#define DO 253 /* please, you use option */ +#define WONT 252 /* I won't use option */ +#define WILL 251 /* I will use option */ +#define SB 250 /* interpret as subnegotiation */ +#define GA 249 /* you may reverse the line */ +#define EL 248 /* erase the current line */ +#define EC 247 /* erase the current character */ +#define AYT 246 /* are you there */ +#define AO 245 /* abort output--but let prog finish */ +#define IP 244 /* interrupt process--permanently */ +#define BREAK 243 /* break */ +#define DM 242 /* data mark--for connect. cleaning */ +#define NOP 241 /* nop */ +#define SE 240 /* end sub negotiation */ +#define EOR 239 /* end of record (transparent mode) */ +#define ABORT 238 /* Abort process */ +#define SUSP 237 /* Suspend process */ +#define xEOF 236 /* End of file: EOF is already used... */ + +#define SYNCH 242 /* for telfunc calls */ + +#ifdef TELCMDS +char *telcmds[] = { + "EOF", "SUSP", "ABORT", "EOR", + "SE", "NOP", "DMARK", "BRK", "IP", "AO", "AYT", "EC", + "EL", "GA", "SB", "WILL", "WONT", "DO", "DONT", "IAC", 0, +}; +#else +extern char *telcmds[]; +#endif + +#define TELCMD_FIRST xEOF +#define TELCMD_LAST IAC +#define TELCMD_OK(x) ((unsigned int)(x) <= TELCMD_LAST && \ + (unsigned int)(x) >= TELCMD_FIRST) +#define TELCMD(x) telcmds[(x)-TELCMD_FIRST] + +/* telnet options */ +#define TELOPT_BINARY 0 /* 8-bit data path */ +#define TELOPT_ECHO 1 /* echo */ +#define TELOPT_RCP 2 /* prepare to reconnect */ +#define TELOPT_SGA 3 /* suppress go ahead */ +#define TELOPT_NAMS 4 /* approximate message size */ +#define TELOPT_STATUS 5 /* give status */ +#define TELOPT_TM 6 /* timing mark */ +#define TELOPT_RCTE 7 /* remote controlled transmission and echo */ +#define TELOPT_NAOL 8 /* negotiate about output line width */ +#define TELOPT_NAOP 9 /* negotiate about output page size */ +#define TELOPT_NAOCRD 10 /* negotiate about CR disposition */ +#define TELOPT_NAOHTS 11 /* negotiate about horizontal tabstops */ +#define TELOPT_NAOHTD 12 /* negotiate about horizontal tab disposition */ +#define TELOPT_NAOFFD 13 /* negotiate about formfeed disposition */ +#define TELOPT_NAOVTS 14 /* negotiate about vertical tab stops */ +#define TELOPT_NAOVTD 15 /* negotiate about vertical tab disposition */ +#define TELOPT_NAOLFD 16 /* negotiate about output LF disposition */ +#define TELOPT_XASCII 17 /* extended ascic character set */ +#define TELOPT_LOGOUT 18 /* force logout */ +#define TELOPT_BM 19 /* byte macro */ +#define TELOPT_DET 20 /* data entry terminal */ +#define TELOPT_SUPDUP 21 /* supdup protocol */ +#define TELOPT_SUPDUPOUTPUT 22 /* supdup output */ +#define TELOPT_SNDLOC 23 /* send location */ +#define TELOPT_TTYPE 24 /* terminal type */ +#define TELOPT_EOR 25 /* end or record */ +#define TELOPT_TUID 26 /* TACACS user identification */ +#define TELOPT_OUTMRK 27 /* output marking */ +#define TELOPT_TTYLOC 28 /* terminal location number */ +#define TELOPT_3270REGIME 29 /* 3270 regime */ +#define TELOPT_X3PAD 30 /* X.3 PAD */ +#define TELOPT_NAWS 31 /* window size */ +#define TELOPT_TSPEED 32 /* terminal speed */ +#define TELOPT_LFLOW 33 /* remote flow control */ +#define TELOPT_LINEMODE 34 /* Linemode option */ +#define TELOPT_XDISPLOC 35 /* X Display Location */ +#define TELOPT_OLD_ENVIRON 36 /* Old - Environment variables */ +#define TELOPT_AUTHENTICATION 37/* Authenticate */ +#define TELOPT_ENCRYPT 38 /* Encryption option */ +#define TELOPT_NEW_ENVIRON 39 /* New - Environment variables */ +#define TELOPT_EXOPL 255 /* extended-options-list */ + + +#define NTELOPTS (1+TELOPT_NEW_ENVIRON) +#ifdef TELOPTS +char *telopts[NTELOPTS+1] = { + "BINARY", "ECHO", "RCP", "SUPPRESS GO AHEAD", "NAME", + "STATUS", "TIMING MARK", "RCTE", "NAOL", "NAOP", + "NAOCRD", "NAOHTS", "NAOHTD", "NAOFFD", "NAOVTS", + "NAOVTD", "NAOLFD", "EXTEND ASCII", "LOGOUT", "BYTE MACRO", + "DATA ENTRY TERMINAL", "SUPDUP", "SUPDUP OUTPUT", + "SEND LOCATION", "TERMINAL TYPE", "END OF RECORD", + "TACACS UID", "OUTPUT MARKING", "TTYLOC", + "3270 REGIME", "X.3 PAD", "NAWS", "TSPEED", "LFLOW", + "LINEMODE", "XDISPLOC", "OLD-ENVIRON", "AUTHENTICATION", + "ENCRYPT", "NEW-ENVIRON", + 0, +}; +#define TELOPT_FIRST TELOPT_BINARY +#define TELOPT_LAST TELOPT_NEW_ENVIRON +#define TELOPT_OK(x) ((unsigned int)(x) <= TELOPT_LAST) +#define TELOPT(x) telopts[(x)-TELOPT_FIRST] +#endif + +/* sub-option qualifiers */ +#define TELQUAL_IS 0 /* option is... */ +#define TELQUAL_SEND 1 /* send option */ +#define TELQUAL_INFO 2 /* ENVIRON: informational version of IS */ +#define TELQUAL_REPLY 2 /* AUTHENTICATION: client version of IS */ +#define TELQUAL_NAME 3 /* AUTHENTICATION: client version of IS */ + +#define LFLOW_OFF 0 /* Disable remote flow control */ +#define LFLOW_ON 1 /* Enable remote flow control */ +#define LFLOW_RESTART_ANY 2 /* Restart output on any char */ +#define LFLOW_RESTART_XON 3 /* Restart output only on XON */ + +/* + * LINEMODE suboptions + */ + +#define LM_MODE 1 +#define LM_FORWARDMASK 2 +#define LM_SLC 3 + +#define MODE_EDIT 0x01 +#define MODE_TRAPSIG 0x02 +#define MODE_ACK 0x04 +#define MODE_SOFT_TAB 0x08 +#define MODE_LIT_ECHO 0x10 + +#define MODE_MASK 0x1f + +/* Not part of protocol, but needed to simplify things... */ +#define MODE_FLOW 0x0100 +#define MODE_ECHO 0x0200 +#define MODE_INBIN 0x0400 +#define MODE_OUTBIN 0x0800 +#define MODE_FORCE 0x1000 + +#define SLC_SYNCH 1 +#define SLC_BRK 2 +#define SLC_IP 3 +#define SLC_AO 4 +#define SLC_AYT 5 +#define SLC_EOR 6 +#define SLC_ABORT 7 +#define SLC_EOF 8 +#define SLC_SUSP 9 +#define SLC_EC 10 +#define SLC_EL 11 +#define SLC_EW 12 +#define SLC_RP 13 +#define SLC_LNEXT 14 +#define SLC_XON 15 +#define SLC_XOFF 16 +#define SLC_FORW1 17 +#define SLC_FORW2 18 + +#define NSLC 18 + +/* + * For backwards compatability, we define SLC_NAMES to be the + * list of names if SLC_NAMES is not defined. + */ +#define SLC_NAMELIST "0", "SYNCH", "BRK", "IP", "AO", "AYT", "EOR", \ + "ABORT", "EOF", "SUSP", "EC", "EL", "EW", "RP", \ + "LNEXT", "XON", "XOFF", "FORW1", "FORW2", 0, +#ifdef SLC_NAMES +char *slc_names[] = { + SLC_NAMELIST +}; +#else +extern char *slc_names[]; +#define SLC_NAMES SLC_NAMELIST +#endif + +#define SLC_NAME_OK(x) ((unsigned int)(x) <= NSLC) +#define SLC_NAME(x) slc_names[x] + +#define SLC_NOSUPPORT 0 +#define SLC_CANTCHANGE 1 +#define SLC_VARIABLE 2 +#define SLC_DEFAULT 3 +#define SLC_LEVELBITS 0x03 + +#define SLC_FUNC 0 +#define SLC_FLAGS 1 +#define SLC_VALUE 2 + +#define SLC_ACK 0x80 +#define SLC_FLUSHIN 0x40 +#define SLC_FLUSHOUT 0x20 + +#define OLD_ENV_VAR 1 +#define OLD_ENV_VALUE 0 +#define NEW_ENV_VAR 0 +#define NEW_ENV_VALUE 1 +#define ENV_ESC 2 +#define ENV_USERVAR 3 + +/* + * AUTHENTICATION suboptions + */ + +/* + * Who is authenticating who ... + */ +#define AUTH_WHO_CLIENT 0 /* Client authenticating server */ +#define AUTH_WHO_SERVER 1 /* Server authenticating client */ +#define AUTH_WHO_MASK 1 + +/* + * amount of authentication done + */ +#define AUTH_HOW_ONE_WAY 0 +#define AUTH_HOW_MUTUAL 2 +#define AUTH_HOW_MASK 2 + +#define AUTHTYPE_NULL 0 +#define AUTHTYPE_KERBEROS_V4 1 +#define AUTHTYPE_KERBEROS_V5 2 +#define AUTHTYPE_SPX 3 +#define AUTHTYPE_MINK 4 +#define AUTHTYPE_CNT 5 + +#define AUTHTYPE_TEST 99 + +#ifdef AUTH_NAMES +char *authtype_names[] = { + "NULL", "KERBEROS_V4", "KERBEROS_V5", "SPX", "MINK", 0, +}; +#else +extern char *authtype_names[]; +#endif + +#define AUTHTYPE_NAME_OK(x) ((unsigned int)(x) < AUTHTYPE_CNT) +#define AUTHTYPE_NAME(x) authtype_names[x] + +/* + * ENCRYPTion suboptions + */ +#define ENCRYPT_IS 0 /* I pick encryption type ... */ +#define ENCRYPT_SUPPORT 1 /* I support encryption types ... */ +#define ENCRYPT_REPLY 2 /* Initial setup response */ +#define ENCRYPT_START 3 /* Am starting to send encrypted */ +#define ENCRYPT_END 4 /* Am ending encrypted */ +#define ENCRYPT_REQSTART 5 /* Request you start encrypting */ +#define ENCRYPT_REQEND 6 /* Request you send encrypting */ +#define ENCRYPT_ENC_KEYID 7 +#define ENCRYPT_DEC_KEYID 8 +#define ENCRYPT_CNT 9 + +#define ENCTYPE_ANY 0 +#define ENCTYPE_DES_CFB64 1 +#define ENCTYPE_DES_OFB64 2 +#define ENCTYPE_CNT 3 + +#ifdef ENCRYPT_NAMES +char *encrypt_names[] = { + "IS", "SUPPORT", "REPLY", "START", "END", + "REQUEST-START", "REQUEST-END", "ENC-KEYID", "DEC-KEYID", + 0, +}; +char *enctype_names[] = { + "ANY", "DES_CFB64", "DES_OFB64", 0, +}; +#else +extern char *encrypt_names[]; +extern char *enctype_names[]; +#endif + + +#define ENCRYPT_NAME_OK(x) ((unsigned int)(x) < ENCRYPT_CNT) +#define ENCRYPT_NAME(x) encrypt_names[x] + +#define ENCTYPE_NAME_OK(x) ((unsigned int)(x) < ENCTYPE_CNT) +#define ENCTYPE_NAME(x) enctype_names[x] + +#endif /* !_TELNET_H_ */ diff --git a/libtelnet/auth-proto.h b/libtelnet/auth-proto.h new file mode 100644 index 0000000..06bba2b --- /dev/null +++ b/libtelnet/auth-proto.h @@ -0,0 +1,96 @@ +/*- + * Copyright (c) 1991, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)auth-proto.h 8.1 (Berkeley) 6/4/93 + */ + +/* + * Copyright (C) 1990 by the Massachusetts Institute of Technology + * + * Export of this software from the United States of America is assumed + * to require a specific license from the United States Government. + * It is the responsibility of any person or organization contemplating + * export to obtain such a license before exporting. + * + * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and + * distribute this software and its documentation for any purpose and + * without fee is hereby granted, provided that the above copyright + * notice appear in all copies and that both that copyright notice and + * this permission notice appear in supporting documentation, and that + * the name of M.I.T. not be used in advertising or publicity pertaining + * to distribution of the software without specific, written prior + * permission. M.I.T. makes no representations about the suitability of + * this software for any purpose. It is provided "as is" without express + * or implied warranty. + */ + +#if !defined(P) +#ifdef __STDC__ +#define P(x) x +#else +#define P(x) () +#endif +#endif + +#if defined(AUTHENTICATION) +Authenticator *findauthenticator P((int, int)); + +void auth_init P((char *, int)); +int auth_cmd P((int, char **)); +void auth_request P((void)); +void auth_send P((unsigned char *, int)); +void auth_send_retry P((void)); +void auth_is P((unsigned char *, int)); +void auth_reply P((unsigned char *, int)); +void auth_finished P((Authenticator *, int)); +int auth_wait P((char *)); +void auth_disable_name P((char *)); +void auth_gen_printsub P((unsigned char *, int, unsigned char *, int)); + +#ifdef KRB4 +int kerberos4_init P((Authenticator *, int)); +int kerberos4_send P((Authenticator *)); +void kerberos4_is P((Authenticator *, unsigned char *, int)); +void kerberos4_reply P((Authenticator *, unsigned char *, int)); +int kerberos4_status P((Authenticator *, char *, int)); +void kerberos4_printsub P((unsigned char *, int, unsigned char *, int)); +#endif + +#ifdef KRB5 +int kerberos5_init P((Authenticator *, int)); +int kerberos5_send P((Authenticator *)); +void kerberos5_is P((Authenticator *, unsigned char *, int)); +void kerberos5_reply P((Authenticator *, unsigned char *, int)); +int kerberos5_status P((Authenticator *, char *, int)); +void kerberos5_printsub P((unsigned char *, int, unsigned char *, int)); +#endif +#endif diff --git a/libtelnet/auth.c b/libtelnet/auth.c new file mode 100644 index 0000000..a8b287c --- /dev/null +++ b/libtelnet/auth.c @@ -0,0 +1,671 @@ +/*- + * Copyright (c) 1991, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)auth.c 8.3 (Berkeley) 5/30/95"; +#endif /* not lint */ + +/* + * Copyright (C) 1990 by the Massachusetts Institute of Technology + * + * Export of this software from the United States of America is assumed + * to require a specific license from the United States Government. + * It is the responsibility of any person or organization contemplating + * export to obtain such a license before exporting. + * + * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and + * distribute this software and its documentation for any purpose and + * without fee is hereby granted, provided that the above copyright + * notice appear in all copies and that both that copyright notice and + * this permission notice appear in supporting documentation, and that + * the name of M.I.T. not be used in advertising or publicity pertaining + * to distribution of the software without specific, written prior + * permission. M.I.T. makes no representations about the suitability of + * this software for any purpose. It is provided "as is" without express + * or implied warranty. + */ + + +#if defined(AUTHENTICATION) +#include +#include +#include +#define AUTH_NAMES +#include +#ifdef __STDC__ +#include +#endif +#ifdef NO_STRING_H +#include +#else +#include +#endif + +#include "encrypt.h" +#include "auth.h" +#include "misc-proto.h" +#include "auth-proto.h" + +#define typemask(x) (1<<((x)-1)) + +#ifdef KRB4_ENCPWD +extern krb4encpwd_init(); +extern krb4encpwd_send(); +extern krb4encpwd_is(); +extern krb4encpwd_reply(); +extern krb4encpwd_status(); +extern krb4encpwd_printsub(); +#endif + +#ifdef RSA_ENCPWD +extern rsaencpwd_init(); +extern rsaencpwd_send(); +extern rsaencpwd_is(); +extern rsaencpwd_reply(); +extern rsaencpwd_status(); +extern rsaencpwd_printsub(); +#endif + +int auth_debug_mode = 0; +static char *Name = "Noname"; +static int Server = 0; +static Authenticator *authenticated = 0; +static int authenticating = 0; +static int validuser = 0; +static unsigned char _auth_send_data[256]; +static unsigned char *auth_send_data; +static int auth_send_cnt = 0; + +/* + * Authentication types supported. Plese note that these are stored + * in priority order, i.e. try the first one first. + */ +Authenticator authenticators[] = { +#ifdef SPX + { AUTHTYPE_SPX, AUTH_WHO_CLIENT|AUTH_HOW_MUTUAL, + spx_init, + spx_send, + spx_is, + spx_reply, + spx_status, + spx_printsub }, + { AUTHTYPE_SPX, AUTH_WHO_CLIENT|AUTH_HOW_ONE_WAY, + spx_init, + spx_send, + spx_is, + spx_reply, + spx_status, + spx_printsub }, +#endif +#ifdef KRB5 +# ifdef ENCRYPTION + { AUTHTYPE_KERBEROS_V5, AUTH_WHO_CLIENT|AUTH_HOW_MUTUAL, + kerberos5_init, + kerberos5_send, + kerberos5_is, + kerberos5_reply, + kerberos5_status, + kerberos5_printsub }, +# endif /* ENCRYPTION */ + { AUTHTYPE_KERBEROS_V5, AUTH_WHO_CLIENT|AUTH_HOW_ONE_WAY, + kerberos5_init, + kerberos5_send, + kerberos5_is, + kerberos5_reply, + kerberos5_status, + kerberos5_printsub }, +#endif +#ifdef KRB4 +# ifdef ENCRYPTION + { AUTHTYPE_KERBEROS_V4, AUTH_WHO_CLIENT|AUTH_HOW_MUTUAL, + kerberos4_init, + kerberos4_send, + kerberos4_is, + kerberos4_reply, + kerberos4_status, + kerberos4_printsub }, +# endif /* ENCRYPTION */ + { AUTHTYPE_KERBEROS_V4, AUTH_WHO_CLIENT|AUTH_HOW_ONE_WAY, + kerberos4_init, + kerberos4_send, + kerberos4_is, + kerberos4_reply, + kerberos4_status, + kerberos4_printsub }, +#endif +#ifdef KRB4_ENCPWD + { AUTHTYPE_KRB4_ENCPWD, AUTH_WHO_CLIENT|AUTH_HOW_MUTUAL, + krb4encpwd_init, + krb4encpwd_send, + krb4encpwd_is, + krb4encpwd_reply, + krb4encpwd_status, + krb4encpwd_printsub }, +#endif +#ifdef RSA_ENCPWD + { AUTHTYPE_RSA_ENCPWD, AUTH_WHO_CLIENT|AUTH_HOW_ONE_WAY, + rsaencpwd_init, + rsaencpwd_send, + rsaencpwd_is, + rsaencpwd_reply, + rsaencpwd_status, + rsaencpwd_printsub }, +#endif + { 0, }, +}; + +static Authenticator NoAuth = { 0 }; + +static int i_support = 0; +static int i_wont_support = 0; + + Authenticator * +findauthenticator(type, way) + int type; + int way; +{ + Authenticator *ap = authenticators; + + while (ap->type && (ap->type != type || ap->way != way)) + ++ap; + return(ap->type ? ap : 0); +} + + void +auth_init(name, server) + char *name; + int server; +{ + Authenticator *ap = authenticators; + + Server = server; + Name = name; + + i_support = 0; + authenticated = 0; + authenticating = 0; + while (ap->type) { + if (!ap->init || (*ap->init)(ap, server)) { + i_support |= typemask(ap->type); + if (auth_debug_mode) + printf(">>>%s: I support auth type %d %d\r\n", + Name, + ap->type, ap->way); + } + else if (auth_debug_mode) + printf(">>>%s: Init failed: auth type %d %d\r\n", + Name, ap->type, ap->way); + ++ap; + } +} + + void +auth_disable_name(name) + char *name; +{ + int x; + for (x = 0; x < AUTHTYPE_CNT; ++x) { + if (!strcasecmp(name, AUTHTYPE_NAME(x))) { + i_wont_support |= typemask(x); + break; + } + } +} + + int +getauthmask(type, maskp) + char *type; + int *maskp; +{ + register int x; + + if (!strcasecmp(type, AUTHTYPE_NAME(0))) { + *maskp = -1; + return(1); + } + + for (x = 1; x < AUTHTYPE_CNT; ++x) { + if (!strcasecmp(type, AUTHTYPE_NAME(x))) { + *maskp = typemask(x); + return(1); + } + } + return(0); +} + + int +auth_enable(type) + char *type; +{ + return(auth_onoff(type, 1)); +} + + int +auth_disable(type) + char *type; +{ + return(auth_onoff(type, 0)); +} + + int +auth_onoff(type, on) + char *type; + int on; +{ + int i, mask = -1; + Authenticator *ap; + + if (!strcasecmp(type, "?") || !strcasecmp(type, "help")) { + printf("auth %s 'type'\n", on ? "enable" : "disable"); + printf("Where 'type' is one of:\n"); + printf("\t%s\n", AUTHTYPE_NAME(0)); + mask = 0; + for (ap = authenticators; ap->type; ap++) { + if ((mask & (i = typemask(ap->type))) != 0) + continue; + mask |= i; + printf("\t%s\n", AUTHTYPE_NAME(ap->type)); + } + return(0); + } + + if (!getauthmask(type, &mask)) { + printf("%s: invalid authentication type\n", type); + return(0); + } + if (on) + i_wont_support &= ~mask; + else + i_wont_support |= mask; + return(1); +} + + int +auth_togdebug(on) + int on; +{ + if (on < 0) + auth_debug_mode ^= 1; + else + auth_debug_mode = on; + printf("auth debugging %s\n", auth_debug_mode ? "enabled" : "disabled"); + return(1); +} + + int +auth_status() +{ + Authenticator *ap; + int i, mask; + + if (i_wont_support == -1) + printf("Authentication disabled\n"); + else + printf("Authentication enabled\n"); + + mask = 0; + for (ap = authenticators; ap->type; ap++) { + if ((mask & (i = typemask(ap->type))) != 0) + continue; + mask |= i; + printf("%s: %s\n", AUTHTYPE_NAME(ap->type), + (i_wont_support & typemask(ap->type)) ? + "disabled" : "enabled"); + } + return(1); +} + +/* + * This routine is called by the server to start authentication + * negotiation. + */ + void +auth_request() +{ + static unsigned char str_request[64] = { IAC, SB, + TELOPT_AUTHENTICATION, + TELQUAL_SEND, }; + Authenticator *ap = authenticators; + unsigned char *e = str_request + 4; + + if (!authenticating) { + authenticating = 1; + while (ap->type) { + if (i_support & ~i_wont_support & typemask(ap->type)) { + if (auth_debug_mode) { + printf(">>>%s: Sending type %d %d\r\n", + Name, ap->type, ap->way); + } + *e++ = ap->type; + *e++ = ap->way; + } + ++ap; + } + *e++ = IAC; + *e++ = SE; + net_write(str_request, e - str_request); + printsub('>', &str_request[2], e - str_request - 2); + } +} + +/* + * This is called when an AUTH SEND is received. + * It should never arrive on the server side (as only the server can + * send an AUTH SEND). + * You should probably respond to it if you can... + * + * If you want to respond to the types out of order (i.e. even + * if he sends LOGIN KERBEROS and you support both, you respond + * with KERBEROS instead of LOGIN (which is against what the + * protocol says)) you will have to hack this code... + */ + void +auth_send(data, cnt) + unsigned char *data; + int cnt; +{ + Authenticator *ap; + static unsigned char str_none[] = { IAC, SB, TELOPT_AUTHENTICATION, + TELQUAL_IS, AUTHTYPE_NULL, 0, + IAC, SE }; + if (Server) { + if (auth_debug_mode) { + printf(">>>%s: auth_send called!\r\n", Name); + } + return; + } + + if (auth_debug_mode) { + printf(">>>%s: auth_send got:", Name); + printd(data, cnt); printf("\r\n"); + } + + /* + * Save the data, if it is new, so that we can continue looking + * at it if the authorization we try doesn't work + */ + if (data < _auth_send_data || + data > _auth_send_data + sizeof(_auth_send_data)) { + auth_send_cnt = cnt > sizeof(_auth_send_data) + ? sizeof(_auth_send_data) + : cnt; + memmove((void *)_auth_send_data, (void *)data, auth_send_cnt); + auth_send_data = _auth_send_data; + } else { + /* + * This is probably a no-op, but we just make sure + */ + auth_send_data = data; + auth_send_cnt = cnt; + } + while ((auth_send_cnt -= 2) >= 0) { + if (auth_debug_mode) + printf(">>>%s: He supports %d\r\n", + Name, *auth_send_data); + if ((i_support & ~i_wont_support) & typemask(*auth_send_data)) { + ap = findauthenticator(auth_send_data[0], + auth_send_data[1]); + if (ap && ap->send) { + if (auth_debug_mode) + printf(">>>%s: Trying %d %d\r\n", + Name, auth_send_data[0], + auth_send_data[1]); + if ((*ap->send)(ap)) { + /* + * Okay, we found one we like + * and did it. + * we can go home now. + */ + if (auth_debug_mode) + printf(">>>%s: Using type %d\r\n", + Name, *auth_send_data); + auth_send_data += 2; + return; + } + } + /* else + * just continue on and look for the + * next one if we didn't do anything. + */ + } + auth_send_data += 2; + } + net_write(str_none, sizeof(str_none)); + printsub('>', &str_none[2], sizeof(str_none) - 2); + if (auth_debug_mode) + printf(">>>%s: Sent failure message\r\n", Name); + auth_finished(0, AUTH_REJECT); +#ifdef KANNAN + /* + * We requested strong authentication, however no mechanisms worked. + * Therefore, exit on client end. + */ + printf("Unable to securely authenticate user ... exit\n"); + exit(0); +#endif /* KANNAN */ +} + + void +auth_send_retry() +{ + /* + * if auth_send_cnt <= 0 then auth_send will end up rejecting + * the authentication and informing the other side of this. + */ + auth_send(auth_send_data, auth_send_cnt); +} + + void +auth_is(data, cnt) + unsigned char *data; + int cnt; +{ + Authenticator *ap; + + if (cnt < 2) + return; + + if (data[0] == AUTHTYPE_NULL) { + auth_finished(0, AUTH_REJECT); + return; + } + + if (ap = findauthenticator(data[0], data[1])) { + if (ap->is) + (*ap->is)(ap, data+2, cnt-2); + } else if (auth_debug_mode) + printf(">>>%s: Invalid authentication in IS: %d\r\n", + Name, *data); +} + + void +auth_reply(data, cnt) + unsigned char *data; + int cnt; +{ + Authenticator *ap; + + if (cnt < 2) + return; + + if (ap = findauthenticator(data[0], data[1])) { + if (ap->reply) + (*ap->reply)(ap, data+2, cnt-2); + } else if (auth_debug_mode) + printf(">>>%s: Invalid authentication in SEND: %d\r\n", + Name, *data); +} + + void +auth_name(data, cnt) + unsigned char *data; + int cnt; +{ + Authenticator *ap; + unsigned char savename[256]; + + if (cnt < 1) { + if (auth_debug_mode) + printf(">>>%s: Empty name in NAME\r\n", Name); + return; + } + if (cnt > sizeof(savename) - 1) { + if (auth_debug_mode) + printf(">>>%s: Name in NAME (%d) exceeds %d length\r\n", + Name, cnt, sizeof(savename)-1); + return; + } + memmove((void *)savename, (void *)data, cnt); + savename[cnt] = '\0'; /* Null terminate */ + if (auth_debug_mode) + printf(">>>%s: Got NAME [%s]\r\n", Name, savename); + auth_encrypt_user(savename); +} + + int +auth_sendname(cp, len) + unsigned char *cp; + int len; +{ + static unsigned char str_request[256+6] + = { IAC, SB, TELOPT_AUTHENTICATION, TELQUAL_NAME, }; + register unsigned char *e = str_request + 4; + register unsigned char *ee = &str_request[sizeof(str_request)-2]; + + while (--len >= 0) { + if ((*e++ = *cp++) == IAC) + *e++ = IAC; + if (e >= ee) + return(0); + } + *e++ = IAC; + *e++ = SE; + net_write(str_request, e - str_request); + printsub('>', &str_request[2], e - &str_request[2]); + return(1); +} + + void +auth_finished(ap, result) + Authenticator *ap; + int result; +{ + if (!(authenticated = ap)) + authenticated = &NoAuth; + validuser = result; +} + + /* ARGSUSED */ + static void +auth_intr(sig) + int sig; +{ + auth_finished(0, AUTH_REJECT); +} + + int +auth_wait(name) + char *name; +{ + if (auth_debug_mode) + printf(">>>%s: in auth_wait.\r\n", Name); + + if (Server && !authenticating) + return(0); + + (void) signal(SIGALRM, auth_intr); + alarm(30); + while (!authenticated) + if (telnet_spin()) + break; + alarm(0); + (void) signal(SIGALRM, SIG_DFL); + + /* + * Now check to see if the user is valid or not + */ + if (!authenticated || authenticated == &NoAuth) + return(AUTH_REJECT); + + if (validuser == AUTH_VALID) + validuser = AUTH_USER; + + if (authenticated->status) + validuser = (*authenticated->status)(authenticated, + name, validuser); + return(validuser); +} + + void +auth_debug(mode) + int mode; +{ + auth_debug_mode = mode; +} + + void +auth_printsub(data, cnt, buf, buflen) + unsigned char *data, *buf; + int cnt, buflen; +{ + Authenticator *ap; + + if ((ap = findauthenticator(data[1], data[2])) && ap->printsub) + (*ap->printsub)(data, cnt, buf, buflen); + else + auth_gen_printsub(data, cnt, buf, buflen); +} + + void +auth_gen_printsub(data, cnt, buf, buflen) + unsigned char *data, *buf; + int cnt, buflen; +{ + register unsigned char *cp; + unsigned char tbuf[16]; + + cnt -= 3; + data += 3; + buf[buflen-1] = '\0'; + buf[buflen-2] = '*'; + buflen -= 2; + for (; cnt > 0; cnt--, data++) { + sprintf((char *)tbuf, " %d", *data); + for (cp = tbuf; *cp && buflen > 0; --buflen) + *buf++ = *cp++; + if (buflen <= 0) + return; + } + *buf = '\0'; +} +#endif diff --git a/libtelnet/auth.h b/libtelnet/auth.h new file mode 100644 index 0000000..615e8a0 --- /dev/null +++ b/libtelnet/auth.h @@ -0,0 +1,87 @@ +/*- + * Copyright (c) 1991, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)auth.h 8.1 (Berkeley) 6/4/93 + */ + +/* + * Copyright (C) 1990 by the Massachusetts Institute of Technology + * + * Export of this software from the United States of America is assumed + * to require a specific license from the United States Government. + * It is the responsibility of any person or organization contemplating + * export to obtain such a license before exporting. + * + * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and + * distribute this software and its documentation for any purpose and + * without fee is hereby granted, provided that the above copyright + * notice appear in all copies and that both that copyright notice and + * this permission notice appear in supporting documentation, and that + * the name of M.I.T. not be used in advertising or publicity pertaining + * to distribution of the software without specific, written prior + * permission. M.I.T. makes no representations about the suitability of + * this software for any purpose. It is provided "as is" without express + * or implied warranty. + */ + +#ifndef __AUTH__ +#define __AUTH__ + +#define AUTH_REJECT 0 /* Rejected */ +#define AUTH_UNKNOWN 1 /* We don't know who he is, but he's okay */ +#define AUTH_OTHER 2 /* We know him, but not his name */ +#define AUTH_USER 3 /* We know he name */ +#define AUTH_VALID 4 /* We know him, and he needs no password */ + +#if !defined(P) +#ifdef __STDC__ +#define P(x) x +#else +#define P(x) () +#endif +#endif + +typedef struct XauthP { + int type; + int way; + int (*init) P((struct XauthP *, int)); + int (*send) P((struct XauthP *)); + void (*is) P((struct XauthP *, unsigned char *, int)); + void (*reply) P((struct XauthP *, unsigned char *, int)); + int (*status) P((struct XauthP *, char *, int)); + void (*printsub) P((unsigned char *, int, unsigned char *, int)); +} Authenticator; + +#include "auth-proto.h" + +extern auth_debug_mode; +#endif diff --git a/libtelnet/enc-proto.h b/libtelnet/enc-proto.h new file mode 100644 index 0000000..2e30908 --- /dev/null +++ b/libtelnet/enc-proto.h @@ -0,0 +1,125 @@ +/*- + * Copyright (c) 1991, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)enc-proto.h 8.1 (Berkeley) 6/4/93 + */ + +/* + * Copyright (C) 1990 by the Massachusetts Institute of Technology + * + * Export of this software from the United States of America is assumed + * to require a specific license from the United States Government. + * It is the responsibility of any person or organization contemplating + * export to obtain such a license before exporting. + * + * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and + * distribute this software and its documentation for any purpose and + * without fee is hereby granted, provided that the above copyright + * notice appear in all copies and that both that copyright notice and + * this permission notice appear in supporting documentation, and that + * the name of M.I.T. not be used in advertising or publicity pertaining + * to distribution of the software without specific, written prior + * permission. M.I.T. makes no representations about the suitability of + * this software for any purpose. It is provided "as is" without express + * or implied warranty. + */ +#if !defined(P) +#ifdef __STDC__ +#define P(x) x +#else +#define P(x) () +#endif +#endif + +#ifdef ENCRYPTION +void encrypt_init P((char *, int)); +Encryptions *findencryption P((int)); +void encrypt_send_supprt P((void)); +void encrypt_auto P((int)); +void decrypt_auto P((int)); +void encrypt_is P((unsigned char *, int)); +void encrypt_reply P((unsigned char *, int)); +void encrypt_start_input P((int)); +void encrypt_session_key P((Session_Key *, int)); +void encrypt_end_input P((void)); +void encrypt_start_output P((int)); +void encrypt_end_output P((void)); +void encrypt_send_request_start P((void)); +void encrypt_send_request_end P((void)); +void encrypt_send_end P((void)); +void encrypt_wait P((void)); +void encrypt_send_support P((void)); +void encrypt_send_keyid P((int, unsigned char *, int, int)); +int net_write P((unsigned char *, int)); + +#ifdef TELENTD +void encrypt_wait P((void)); +#else +int encrypt_cmd P((int, char **)); +void encrypt_display P((void)); +#endif + +void krbdes_encrypt P((unsigned char *, int)); +int krbdes_decrypt P((int)); +int krbdes_is P((unsigned char *, int)); +int krbdes_reply P((unsigned char *, int)); +void krbdes_init P((int)); +int krbdes_start P((int, int)); +void krbdes_session P((Session_Key *, int)); +void krbdes_printsub P((unsigned char *, int, unsigned char *, int)); + +void cfb64_encrypt P((unsigned char *, int)); +int cfb64_decrypt P((int)); +void cfb64_init P((int)); +int cfb64_start P((int, int)); +int cfb64_is P((unsigned char *, int)); +int cfb64_reply P((unsigned char *, int)); +void cfb64_session P((Session_Key *, int)); +int cfb64_keyid P((int, unsigned char *, int *)); +void cfb64_printsub P((unsigned char *, int, unsigned char *, int)); + +void ofb64_encrypt P((unsigned char *, int)); +int ofb64_decrypt P((int)); +void ofb64_init P((int)); +int ofb64_start P((int, int)); +int ofb64_is P((unsigned char *, int)); +int ofb64_reply P((unsigned char *, int)); +void ofb64_session P((Session_Key *, int)); +int ofb64_keyid P((int, unsigned char *, int *)); +void ofb64_printsub P((unsigned char *, int, unsigned char *, int)); + +int des_new_random_key P((Block)); +void des_set_random_generator_seed P((Block)); +void des_key_sched P((Block, Schedule)); +void des_ecb_encrypt P((Block, Block, Schedule, int)); +int des_string_to_key P((char *, Block)); +#endif /* ENCRYPTION */ diff --git a/libtelnet/enc_des.c b/libtelnet/enc_des.c new file mode 100644 index 0000000..d6886fd --- /dev/null +++ b/libtelnet/enc_des.c @@ -0,0 +1,724 @@ +/*- + * Copyright (c) 1991, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)enc_des.c 8.3 (Berkeley) 5/30/95"; +#endif /* not lint */ + +#ifdef ENCRYPTION +# ifdef AUTHENTICATION +# ifdef DES_ENCRYPTION +#include +#include +#ifdef __STDC__ +#include +#endif + +#include "encrypt.h" +#include "key-proto.h" +#include "misc-proto.h" + +extern encrypt_debug_mode; + +#define CFB 0 +#define OFB 1 + +#define NO_SEND_IV 1 +#define NO_RECV_IV 2 +#define NO_KEYID 4 +#define IN_PROGRESS (NO_SEND_IV|NO_RECV_IV|NO_KEYID) +#define SUCCESS 0 +#define FAILED -1 + + +struct fb { + Block krbdes_key; + Schedule krbdes_sched; + Block temp_feed; + unsigned char fb_feed[64]; + int need_start; + int state[2]; + int keyid[2]; + int once; + struct stinfo { + Block str_output; + Block str_feed; + Block str_iv; + Block str_ikey; + Schedule str_sched; + int str_index; + int str_flagshift; + } streams[2]; +}; + +static struct fb fb[2]; + +struct keyidlist { + char *keyid; + int keyidlen; + char *key; + int keylen; + int flags; +} keyidlist [] = { + { "\0", 1, 0, 0, 0 }, /* default key of zero */ + { 0, 0, 0, 0, 0 } +}; + +#define KEYFLAG_MASK 03 + +#define KEYFLAG_NOINIT 00 +#define KEYFLAG_INIT 01 +#define KEYFLAG_OK 02 +#define KEYFLAG_BAD 03 + +#define KEYFLAG_SHIFT 2 + +#define SHIFT_VAL(a,b) (KEYFLAG_SHIFT*((a)+((b)*2))) + +#define FB64_IV 1 +#define FB64_IV_OK 2 +#define FB64_IV_BAD 3 + + +void fb64_stream_iv P((Block, struct stinfo *)); +void fb64_init P((struct fb *)); +static int fb64_start P((struct fb *, int, int)); +int fb64_is P((unsigned char *, int, struct fb *)); +int fb64_reply P((unsigned char *, int, struct fb *)); +static void fb64_session P((Session_Key *, int, struct fb *)); +void fb64_stream_key P((Block, struct stinfo *)); +int fb64_keyid P((int, unsigned char *, int *, struct fb *)); + + void +cfb64_init(server) + int server; +{ + fb64_init(&fb[CFB]); + fb[CFB].fb_feed[4] = ENCTYPE_DES_CFB64; + fb[CFB].streams[0].str_flagshift = SHIFT_VAL(0, CFB); + fb[CFB].streams[1].str_flagshift = SHIFT_VAL(1, CFB); +} + + void +ofb64_init(server) + int server; +{ + fb64_init(&fb[OFB]); + fb[OFB].fb_feed[4] = ENCTYPE_DES_OFB64; + fb[CFB].streams[0].str_flagshift = SHIFT_VAL(0, OFB); + fb[CFB].streams[1].str_flagshift = SHIFT_VAL(1, OFB); +} + + void +fb64_init(fbp) + register struct fb *fbp; +{ + memset((void *)fbp, 0, sizeof(*fbp)); + fbp->state[0] = fbp->state[1] = FAILED; + fbp->fb_feed[0] = IAC; + fbp->fb_feed[1] = SB; + fbp->fb_feed[2] = TELOPT_ENCRYPT; + fbp->fb_feed[3] = ENCRYPT_IS; +} + +/* + * Returns: + * -1: some error. Negotiation is done, encryption not ready. + * 0: Successful, initial negotiation all done. + * 1: successful, negotiation not done yet. + * 2: Not yet. Other things (like getting the key from + * Kerberos) have to happen before we can continue. + */ + int +cfb64_start(dir, server) + int dir; + int server; +{ + return(fb64_start(&fb[CFB], dir, server)); +} + int +ofb64_start(dir, server) + int dir; + int server; +{ + return(fb64_start(&fb[OFB], dir, server)); +} + + static int +fb64_start(fbp, dir, server) + struct fb *fbp; + int dir; + int server; +{ + Block b; + int x; + unsigned char *p; + register int state; + + switch (dir) { + case DIR_DECRYPT: + /* + * This is simply a request to have the other side + * start output (our input). He will negotiate an + * IV so we need not look for it. + */ + state = fbp->state[dir-1]; + if (state == FAILED) + state = IN_PROGRESS; + break; + + case DIR_ENCRYPT: + state = fbp->state[dir-1]; + if (state == FAILED) + state = IN_PROGRESS; + else if ((state & NO_SEND_IV) == 0) + break; + + if (!VALIDKEY(fbp->krbdes_key)) { + fbp->need_start = 1; + break; + } + state &= ~NO_SEND_IV; + state |= NO_RECV_IV; + if (encrypt_debug_mode) + printf("Creating new feed\r\n"); + /* + * Create a random feed and send it over. + */ + des_new_random_key(fbp->temp_feed); + des_ecb_encrypt(fbp->temp_feed, fbp->temp_feed, + fbp->krbdes_sched, 1); + p = fbp->fb_feed + 3; + *p++ = ENCRYPT_IS; + p++; + *p++ = FB64_IV; + for (x = 0; x < sizeof(Block); ++x) { + if ((*p++ = fbp->temp_feed[x]) == IAC) + *p++ = IAC; + } + *p++ = IAC; + *p++ = SE; + printsub('>', &fbp->fb_feed[2], p - &fbp->fb_feed[2]); + net_write(fbp->fb_feed, p - fbp->fb_feed); + break; + default: + return(FAILED); + } + return(fbp->state[dir-1] = state); +} + +/* + * Returns: + * -1: some error. Negotiation is done, encryption not ready. + * 0: Successful, initial negotiation all done. + * 1: successful, negotiation not done yet. + */ + int +cfb64_is(data, cnt) + unsigned char *data; + int cnt; +{ + return(fb64_is(data, cnt, &fb[CFB])); +} + int +ofb64_is(data, cnt) + unsigned char *data; + int cnt; +{ + return(fb64_is(data, cnt, &fb[OFB])); +} + + int +fb64_is(data, cnt, fbp) + unsigned char *data; + int cnt; + struct fb *fbp; +{ + int x; + unsigned char *p; + Block b; + register int state = fbp->state[DIR_DECRYPT-1]; + + if (cnt-- < 1) + goto failure; + + switch (*data++) { + case FB64_IV: + if (cnt != sizeof(Block)) { + if (encrypt_debug_mode) + printf("CFB64: initial vector failed on size\r\n"); + state = FAILED; + goto failure; + } + + if (encrypt_debug_mode) + printf("CFB64: initial vector received\r\n"); + + if (encrypt_debug_mode) + printf("Initializing Decrypt stream\r\n"); + + fb64_stream_iv((void *)data, &fbp->streams[DIR_DECRYPT-1]); + + p = fbp->fb_feed + 3; + *p++ = ENCRYPT_REPLY; + p++; + *p++ = FB64_IV_OK; + *p++ = IAC; + *p++ = SE; + printsub('>', &fbp->fb_feed[2], p - &fbp->fb_feed[2]); + net_write(fbp->fb_feed, p - fbp->fb_feed); + + state = fbp->state[DIR_DECRYPT-1] = IN_PROGRESS; + break; + + default: + if (encrypt_debug_mode) { + printf("Unknown option type: %d\r\n", *(data-1)); + printd(data, cnt); + printf("\r\n"); + } + /* FALL THROUGH */ + failure: + /* + * We failed. Send an FB64_IV_BAD option + * to the other side so it will know that + * things failed. + */ + p = fbp->fb_feed + 3; + *p++ = ENCRYPT_REPLY; + p++; + *p++ = FB64_IV_BAD; + *p++ = IAC; + *p++ = SE; + printsub('>', &fbp->fb_feed[2], p - &fbp->fb_feed[2]); + net_write(fbp->fb_feed, p - fbp->fb_feed); + + break; + } + return(fbp->state[DIR_DECRYPT-1] = state); +} + +/* + * Returns: + * -1: some error. Negotiation is done, encryption not ready. + * 0: Successful, initial negotiation all done. + * 1: successful, negotiation not done yet. + */ + int +cfb64_reply(data, cnt) + unsigned char *data; + int cnt; +{ + return(fb64_reply(data, cnt, &fb[CFB])); +} + int +ofb64_reply(data, cnt) + unsigned char *data; + int cnt; +{ + return(fb64_reply(data, cnt, &fb[OFB])); +} + + + int +fb64_reply(data, cnt, fbp) + unsigned char *data; + int cnt; + struct fb *fbp; +{ + int x; + unsigned char *p; + Block b; + register int state = fbp->state[DIR_ENCRYPT-1]; + + if (cnt-- < 1) + goto failure; + + switch (*data++) { + case FB64_IV_OK: + fb64_stream_iv(fbp->temp_feed, &fbp->streams[DIR_ENCRYPT-1]); + if (state == FAILED) + state = IN_PROGRESS; + state &= ~NO_RECV_IV; + encrypt_send_keyid(DIR_ENCRYPT, (unsigned char *)"\0", 1, 1); + break; + + case FB64_IV_BAD: + memset(fbp->temp_feed, 0, sizeof(Block)); + fb64_stream_iv(fbp->temp_feed, &fbp->streams[DIR_ENCRYPT-1]); + state = FAILED; + break; + + default: + if (encrypt_debug_mode) { + printf("Unknown option type: %d\r\n", data[-1]); + printd(data, cnt); + printf("\r\n"); + } + /* FALL THROUGH */ + failure: + state = FAILED; + break; + } + return(fbp->state[DIR_ENCRYPT-1] = state); +} + + void +cfb64_session(key, server) + Session_Key *key; + int server; +{ + fb64_session(key, server, &fb[CFB]); +} + + void +ofb64_session(key, server) + Session_Key *key; + int server; +{ + fb64_session(key, server, &fb[OFB]); +} + + static void +fb64_session(key, server, fbp) + Session_Key *key; + int server; + struct fb *fbp; +{ + + if (!key || key->type != SK_DES) { + if (encrypt_debug_mode) + printf("Can't set krbdes's session key (%d != %d)\r\n", + key ? key->type : -1, SK_DES); + return; + } + memmove((void *)fbp->krbdes_key, (void *)key->data, sizeof(Block)); + + fb64_stream_key(fbp->krbdes_key, &fbp->streams[DIR_ENCRYPT-1]); + fb64_stream_key(fbp->krbdes_key, &fbp->streams[DIR_DECRYPT-1]); + + if (fbp->once == 0) { + des_set_random_generator_seed(fbp->krbdes_key); + fbp->once = 1; + } + des_key_sched(fbp->krbdes_key, fbp->krbdes_sched); + /* + * Now look to see if krbdes_start() was was waiting for + * the key to show up. If so, go ahead an call it now + * that we have the key. + */ + if (fbp->need_start) { + fbp->need_start = 0; + fb64_start(fbp, DIR_ENCRYPT, server); + } +} + +/* + * We only accept a keyid of 0. If we get a keyid of + * 0, then mark the state as SUCCESS. + */ + int +cfb64_keyid(dir, kp, lenp) + int dir, *lenp; + unsigned char *kp; +{ + return(fb64_keyid(dir, kp, lenp, &fb[CFB])); +} + + int +ofb64_keyid(dir, kp, lenp) + int dir, *lenp; + unsigned char *kp; +{ + return(fb64_keyid(dir, kp, lenp, &fb[OFB])); +} + + int +fb64_keyid(dir, kp, lenp, fbp) + int dir, *lenp; + unsigned char *kp; + struct fb *fbp; +{ + register int state = fbp->state[dir-1]; + + if (*lenp != 1 || (*kp != '\0')) { + *lenp = 0; + return(state); + } + + if (state == FAILED) + state = IN_PROGRESS; + + state &= ~NO_KEYID; + + return(fbp->state[dir-1] = state); +} + + void +fb64_printsub(data, cnt, buf, buflen, type) + unsigned char *data, *buf, *type; + int cnt, buflen; +{ + char lbuf[32]; + register int i; + char *cp; + + buf[buflen-1] = '\0'; /* make sure it's NULL terminated */ + buflen -= 1; + + switch(data[2]) { + case FB64_IV: + sprintf(lbuf, "%s_IV", type); + cp = lbuf; + goto common; + + case FB64_IV_OK: + sprintf(lbuf, "%s_IV_OK", type); + cp = lbuf; + goto common; + + case FB64_IV_BAD: + sprintf(lbuf, "%s_IV_BAD", type); + cp = lbuf; + goto common; + + default: + sprintf(lbuf, " %d (unknown)", data[2]); + cp = lbuf; + common: + for (; (buflen > 0) && (*buf = *cp++); buf++) + buflen--; + for (i = 3; i < cnt; i++) { + sprintf(lbuf, " %d", data[i]); + for (cp = lbuf; (buflen > 0) && (*buf = *cp++); buf++) + buflen--; + } + break; + } +} + + void +cfb64_printsub(data, cnt, buf, buflen) + unsigned char *data, *buf; + int cnt, buflen; +{ + fb64_printsub(data, cnt, buf, buflen, "CFB64"); +} + + void +ofb64_printsub(data, cnt, buf, buflen) + unsigned char *data, *buf; + int cnt, buflen; +{ + fb64_printsub(data, cnt, buf, buflen, "OFB64"); +} + + void +fb64_stream_iv(seed, stp) + Block seed; + register struct stinfo *stp; +{ + + memmove((void *)stp->str_iv, (void *)seed, sizeof(Block)); + memmove((void *)stp->str_output, (void *)seed, sizeof(Block)); + + des_key_sched(stp->str_ikey, stp->str_sched); + + stp->str_index = sizeof(Block); +} + + void +fb64_stream_key(key, stp) + Block key; + register struct stinfo *stp; +{ + memmove((void *)stp->str_ikey, (void *)key, sizeof(Block)); + des_key_sched(key, stp->str_sched); + + memmove((void *)stp->str_output, (void *)stp->str_iv, sizeof(Block)); + + stp->str_index = sizeof(Block); +} + +/* + * DES 64 bit Cipher Feedback + * + * key --->+-----+ + * +->| DES |--+ + * | +-----+ | + * | v + * INPUT --(--------->(+)+---> DATA + * | | + * +-------------+ + * + * + * Given: + * iV: Initial vector, 64 bits (8 bytes) long. + * Dn: the nth chunk of 64 bits (8 bytes) of data to encrypt (decrypt). + * On: the nth chunk of 64 bits (8 bytes) of encrypted (decrypted) output. + * + * V0 = DES(iV, key) + * On = Dn ^ Vn + * V(n+1) = DES(On, key) + */ + + void +cfb64_encrypt(s, c) + register unsigned char *s; + int c; +{ + register struct stinfo *stp = &fb[CFB].streams[DIR_ENCRYPT-1]; + register int index; + + index = stp->str_index; + while (c-- > 0) { + if (index == sizeof(Block)) { + Block b; + des_ecb_encrypt(stp->str_output, b, stp->str_sched, 1); + memmove((void *)stp->str_feed, (void *)b, sizeof(Block)); + index = 0; + } + + /* On encryption, we store (feed ^ data) which is cypher */ + *s = stp->str_output[index] = (stp->str_feed[index] ^ *s); + s++; + index++; + } + stp->str_index = index; +} + + int +cfb64_decrypt(data) + int data; +{ + register struct stinfo *stp = &fb[CFB].streams[DIR_DECRYPT-1]; + int index; + + if (data == -1) { + /* + * Back up one byte. It is assumed that we will + * never back up more than one byte. If we do, this + * may or may not work. + */ + if (stp->str_index) + --stp->str_index; + return(0); + } + + index = stp->str_index++; + if (index == sizeof(Block)) { + Block b; + des_ecb_encrypt(stp->str_output, b, stp->str_sched, 1); + memmove((void *)stp->str_feed, (void *)b, sizeof(Block)); + stp->str_index = 1; /* Next time will be 1 */ + index = 0; /* But now use 0 */ + } + + /* On decryption we store (data) which is cypher. */ + stp->str_output[index] = data; + return(data ^ stp->str_feed[index]); +} + +/* + * DES 64 bit Output Feedback + * + * key --->+-----+ + * +->| DES |--+ + * | +-----+ | + * +-----------+ + * v + * INPUT -------->(+) ----> DATA + * + * Given: + * iV: Initial vector, 64 bits (8 bytes) long. + * Dn: the nth chunk of 64 bits (8 bytes) of data to encrypt (decrypt). + * On: the nth chunk of 64 bits (8 bytes) of encrypted (decrypted) output. + * + * V0 = DES(iV, key) + * V(n+1) = DES(Vn, key) + * On = Dn ^ Vn + */ + void +ofb64_encrypt(s, c) + register unsigned char *s; + int c; +{ + register struct stinfo *stp = &fb[OFB].streams[DIR_ENCRYPT-1]; + register int index; + + index = stp->str_index; + while (c-- > 0) { + if (index == sizeof(Block)) { + Block b; + des_ecb_encrypt(stp->str_feed, b, stp->str_sched, 1); + memmove((void *)stp->str_feed, (void *)b, sizeof(Block)); + index = 0; + } + *s++ ^= stp->str_feed[index]; + index++; + } + stp->str_index = index; +} + + int +ofb64_decrypt(data) + int data; +{ + register struct stinfo *stp = &fb[OFB].streams[DIR_DECRYPT-1]; + int index; + + if (data == -1) { + /* + * Back up one byte. It is assumed that we will + * never back up more than one byte. If we do, this + * may or may not work. + */ + if (stp->str_index) + --stp->str_index; + return(0); + } + + index = stp->str_index++; + if (index == sizeof(Block)) { + Block b; + des_ecb_encrypt(stp->str_feed, b, stp->str_sched, 1); + memmove((void *)stp->str_feed, (void *)b, sizeof(Block)); + stp->str_index = 1; /* Next time will be 1 */ + index = 0; /* But now use 0 */ + } + + return(data ^ stp->str_feed[index]); +} +# endif /* DES_ENCRYPTION */ +# endif /* AUTHENTICATION */ +#endif /* ENCRYPTION */ diff --git a/libtelnet/encrypt.c b/libtelnet/encrypt.c new file mode 100644 index 0000000..432df0c --- /dev/null +++ b/libtelnet/encrypt.c @@ -0,0 +1,1000 @@ +/*- + * Copyright (c) 1991, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)encrypt.c 8.2 (Berkeley) 5/30/95"; +#endif /* not lint */ + +/* + * Copyright (C) 1990 by the Massachusetts Institute of Technology + * + * Export of this software from the United States of America is assumed + * to require a specific license from the United States Government. + * It is the responsibility of any person or organization contemplating + * export to obtain such a license before exporting. + * + * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and + * distribute this software and its documentation for any purpose and + * without fee is hereby granted, provided that the above copyright + * notice appear in all copies and that both that copyright notice and + * this permission notice appear in supporting documentation, and that + * the name of M.I.T. not be used in advertising or publicity pertaining + * to distribution of the software without specific, written prior + * permission. M.I.T. makes no representations about the suitability of + * this software for any purpose. It is provided "as is" without express + * or implied warranty. + */ + +#ifdef ENCRYPTION + +#define ENCRYPT_NAMES +#include + +#include "encrypt.h" +#include "misc.h" + +#ifdef __STDC__ +#include +#endif +#ifdef NO_STRING_H +#include +#else +#include +#endif + +/* + * These functions pointers point to the current routines + * for encrypting and decrypting data. + */ +void (*encrypt_output) P((unsigned char *, int)); +int (*decrypt_input) P((int)); + +int encrypt_debug_mode = 0; +static int decrypt_mode = 0; +static int encrypt_mode = 0; +static int encrypt_verbose = 0; +static int autoencrypt = 0; +static int autodecrypt = 0; +static int havesessionkey = 0; +static int Server = 0; +static char *Name = "Noname"; + +#define typemask(x) ((x) > 0 ? 1 << ((x)-1) : 0) + +static long i_support_encrypt = typemask(ENCTYPE_DES_CFB64) + | typemask(ENCTYPE_DES_OFB64); +static long i_support_decrypt = typemask(ENCTYPE_DES_CFB64) + | typemask(ENCTYPE_DES_OFB64); +static long i_wont_support_encrypt = 0; +static long i_wont_support_decrypt = 0; +#define I_SUPPORT_ENCRYPT (i_support_encrypt & ~i_wont_support_encrypt) +#define I_SUPPORT_DECRYPT (i_support_decrypt & ~i_wont_support_decrypt) + +static long remote_supports_encrypt = 0; +static long remote_supports_decrypt = 0; + +static Encryptions encryptions[] = { +#ifdef DES_ENCRYPTION + { "DES_CFB64", ENCTYPE_DES_CFB64, + cfb64_encrypt, + cfb64_decrypt, + cfb64_init, + cfb64_start, + cfb64_is, + cfb64_reply, + cfb64_session, + cfb64_keyid, + cfb64_printsub }, + { "DES_OFB64", ENCTYPE_DES_OFB64, + ofb64_encrypt, + ofb64_decrypt, + ofb64_init, + ofb64_start, + ofb64_is, + ofb64_reply, + ofb64_session, + ofb64_keyid, + ofb64_printsub }, +#endif /* DES_ENCRYPTION */ + { 0, }, +}; + +static unsigned char str_send[64] = { IAC, SB, TELOPT_ENCRYPT, + ENCRYPT_SUPPORT }; +static unsigned char str_suplen = 0; +static unsigned char str_start[72] = { IAC, SB, TELOPT_ENCRYPT }; +static unsigned char str_end[] = { IAC, SB, TELOPT_ENCRYPT, 0, IAC, SE }; + + Encryptions * +findencryption(type) + int type; +{ + Encryptions *ep = encryptions; + + if (!(I_SUPPORT_ENCRYPT & remote_supports_decrypt & typemask(type))) + return(0); + while (ep->type && ep->type != type) + ++ep; + return(ep->type ? ep : 0); +} + + Encryptions * +finddecryption(type) + int type; +{ + Encryptions *ep = encryptions; + + if (!(I_SUPPORT_DECRYPT & remote_supports_encrypt & typemask(type))) + return(0); + while (ep->type && ep->type != type) + ++ep; + return(ep->type ? ep : 0); +} + +#define MAXKEYLEN 64 + +static struct key_info { + unsigned char keyid[MAXKEYLEN]; + int keylen; + int dir; + int *modep; + Encryptions *(*getcrypt)(); +} ki[2] = { + { { 0 }, 0, DIR_ENCRYPT, &encrypt_mode, findencryption }, + { { 0 }, 0, DIR_DECRYPT, &decrypt_mode, finddecryption }, +}; + + void +encrypt_init(name, server) + char *name; + int server; +{ + Encryptions *ep = encryptions; + + Name = name; + Server = server; + i_support_encrypt = i_support_decrypt = 0; + remote_supports_encrypt = remote_supports_decrypt = 0; + encrypt_mode = 0; + decrypt_mode = 0; + encrypt_output = 0; + decrypt_input = 0; +#ifdef notdef + encrypt_verbose = !server; +#endif + + str_suplen = 4; + + while (ep->type) { + if (encrypt_debug_mode) + printf(">>>%s: I will support %s\r\n", + Name, ENCTYPE_NAME(ep->type)); + i_support_encrypt |= typemask(ep->type); + i_support_decrypt |= typemask(ep->type); + if ((i_wont_support_decrypt & typemask(ep->type)) == 0) + if ((str_send[str_suplen++] = ep->type) == IAC) + str_send[str_suplen++] = IAC; + if (ep->init) + (*ep->init)(Server); + ++ep; + } + str_send[str_suplen++] = IAC; + str_send[str_suplen++] = SE; +} + + void +encrypt_list_types() +{ + Encryptions *ep = encryptions; + + printf("Valid encryption types:\n"); + while (ep->type) { + printf("\t%s (%d)\r\n", ENCTYPE_NAME(ep->type), ep->type); + ++ep; + } +} + + int +EncryptEnable(type, mode) + char *type, *mode; +{ + if (isprefix(type, "help") || isprefix(type, "?")) { + printf("Usage: encrypt enable [input|output]\n"); + encrypt_list_types(); + return(0); + } + if (EncryptType(type, mode)) + return(EncryptStart(mode)); + return(0); +} + + int +EncryptDisable(type, mode) + char *type, *mode; +{ + register Encryptions *ep; + int ret = 0; + + if (isprefix(type, "help") || isprefix(type, "?")) { + printf("Usage: encrypt disable [input|output]\n"); + encrypt_list_types(); + } else if ((ep = (Encryptions *)genget(type, encryptions, + sizeof(Encryptions))) == 0) { + printf("%s: invalid encryption type\n", type); + } else if (Ambiguous(ep)) { + printf("Ambiguous type '%s'\n", type); + } else { + if ((mode == 0) || (isprefix(mode, "input") ? 1 : 0)) { + if (decrypt_mode == ep->type) + EncryptStopInput(); + i_wont_support_decrypt |= typemask(ep->type); + ret = 1; + } + if ((mode == 0) || (isprefix(mode, "output"))) { + if (encrypt_mode == ep->type) + EncryptStopOutput(); + i_wont_support_encrypt |= typemask(ep->type); + ret = 1; + } + if (ret == 0) + printf("%s: invalid encryption mode\n", mode); + } + return(ret); +} + + int +EncryptType(type, mode) + char *type; + char *mode; +{ + register Encryptions *ep; + int ret = 0; + + if (isprefix(type, "help") || isprefix(type, "?")) { + printf("Usage: encrypt type [input|output]\n"); + encrypt_list_types(); + } else if ((ep = (Encryptions *)genget(type, encryptions, + sizeof(Encryptions))) == 0) { + printf("%s: invalid encryption type\n", type); + } else if (Ambiguous(ep)) { + printf("Ambiguous type '%s'\n", type); + } else { + if ((mode == 0) || isprefix(mode, "input")) { + decrypt_mode = ep->type; + i_wont_support_decrypt &= ~typemask(ep->type); + ret = 1; + } + if ((mode == 0) || isprefix(mode, "output")) { + encrypt_mode = ep->type; + i_wont_support_encrypt &= ~typemask(ep->type); + ret = 1; + } + if (ret == 0) + printf("%s: invalid encryption mode\n", mode); + } + return(ret); +} + + int +EncryptStart(mode) + char *mode; +{ + register int ret = 0; + if (mode) { + if (isprefix(mode, "input")) + return(EncryptStartInput()); + if (isprefix(mode, "output")) + return(EncryptStartOutput()); + if (isprefix(mode, "help") || isprefix(mode, "?")) { + printf("Usage: encrypt start [input|output]\n"); + return(0); + } + printf("%s: invalid encryption mode 'encrypt start ?' for help\n", mode); + return(0); + } + ret += EncryptStartInput(); + ret += EncryptStartOutput(); + return(ret); +} + + int +EncryptStartInput() +{ + if (decrypt_mode) { + encrypt_send_request_start(); + return(1); + } + printf("No previous decryption mode, decryption not enabled\r\n"); + return(0); +} + + int +EncryptStartOutput() +{ + if (encrypt_mode) { + encrypt_start_output(encrypt_mode); + return(1); + } + printf("No previous encryption mode, encryption not enabled\r\n"); + return(0); +} + + int +EncryptStop(mode) + char *mode; +{ + int ret = 0; + if (mode) { + if (isprefix(mode, "input")) + return(EncryptStopInput()); + if (isprefix(mode, "output")) + return(EncryptStopOutput()); + if (isprefix(mode, "help") || isprefix(mode, "?")) { + printf("Usage: encrypt stop [input|output]\n"); + return(0); + } + printf("%s: invalid encryption mode 'encrypt stop ?' for help\n", mode); + return(0); + } + ret += EncryptStopInput(); + ret += EncryptStopOutput(); + return(ret); +} + + int +EncryptStopInput() +{ + encrypt_send_request_end(); + return(1); +} + + int +EncryptStopOutput() +{ + encrypt_send_end(); + return(1); +} + + void +encrypt_display() +{ + if (encrypt_output) + printf("Currently encrypting output with %s\r\n", + ENCTYPE_NAME(encrypt_mode)); + if (decrypt_input) + printf("Currently decrypting input with %s\r\n", + ENCTYPE_NAME(decrypt_mode)); +} + + int +EncryptStatus() +{ + if (encrypt_output) + printf("Currently encrypting output with %s\r\n", + ENCTYPE_NAME(encrypt_mode)); + else if (encrypt_mode) { + printf("Currently output is clear text.\r\n"); + printf("Last encryption mode was %s\r\n", + ENCTYPE_NAME(encrypt_mode)); + } + if (decrypt_input) { + printf("Currently decrypting input with %s\r\n", + ENCTYPE_NAME(decrypt_mode)); + } else if (decrypt_mode) { + printf("Currently input is clear text.\r\n"); + printf("Last decryption mode was %s\r\n", + ENCTYPE_NAME(decrypt_mode)); + } + return 1; +} + + void +encrypt_send_support() +{ + if (str_suplen) { + /* + * If the user has requested that decryption start + * immediatly, then send a "REQUEST START" before + * we negotiate the type. + */ + if (!Server && autodecrypt) + encrypt_send_request_start(); + net_write(str_send, str_suplen); + printsub('>', &str_send[2], str_suplen - 2); + str_suplen = 0; + } +} + + int +EncryptDebug(on) + int on; +{ + if (on < 0) + encrypt_debug_mode ^= 1; + else + encrypt_debug_mode = on; + printf("Encryption debugging %s\r\n", + encrypt_debug_mode ? "enabled" : "disabled"); + return(1); +} + + int +EncryptVerbose(on) + int on; +{ + if (on < 0) + encrypt_verbose ^= 1; + else + encrypt_verbose = on; + printf("Encryption %s verbose\r\n", + encrypt_verbose ? "is" : "is not"); + return(1); +} + + int +EncryptAutoEnc(on) + int on; +{ + encrypt_auto(on); + printf("Automatic encryption of output is %s\r\n", + autoencrypt ? "enabled" : "disabled"); + return(1); +} + + int +EncryptAutoDec(on) + int on; +{ + decrypt_auto(on); + printf("Automatic decryption of input is %s\r\n", + autodecrypt ? "enabled" : "disabled"); + return(1); +} + +/* + * Called when ENCRYPT SUPPORT is received. + */ + void +encrypt_support(typelist, cnt) + unsigned char *typelist; + int cnt; +{ + register int type, use_type = 0; + Encryptions *ep; + + /* + * Forget anything the other side has previously told us. + */ + remote_supports_decrypt = 0; + + while (cnt-- > 0) { + type = *typelist++; + if (encrypt_debug_mode) + printf(">>>%s: He is supporting %s (%d)\r\n", + Name, + ENCTYPE_NAME(type), type); + if ((type < ENCTYPE_CNT) && + (I_SUPPORT_ENCRYPT & typemask(type))) { + remote_supports_decrypt |= typemask(type); + if (use_type == 0) + use_type = type; + } + } + if (use_type) { + ep = findencryption(use_type); + if (!ep) + return; + type = ep->start ? (*ep->start)(DIR_ENCRYPT, Server) : 0; + if (encrypt_debug_mode) + printf(">>>%s: (*ep->start)() returned %d\r\n", + Name, type); + if (type < 0) + return; + encrypt_mode = use_type; + if (type == 0) + encrypt_start_output(use_type); + } +} + + void +encrypt_is(data, cnt) + unsigned char *data; + int cnt; +{ + Encryptions *ep; + register int type, ret; + + if (--cnt < 0) + return; + type = *data++; + if (type < ENCTYPE_CNT) + remote_supports_encrypt |= typemask(type); + if (!(ep = finddecryption(type))) { + if (encrypt_debug_mode) + printf(">>>%s: Can't find type %s (%d) for initial negotiation\r\n", + Name, + ENCTYPE_NAME_OK(type) + ? ENCTYPE_NAME(type) : "(unknown)", + type); + return; + } + if (!ep->is) { + if (encrypt_debug_mode) + printf(">>>%s: No initial negotiation needed for type %s (%d)\r\n", + Name, + ENCTYPE_NAME_OK(type) + ? ENCTYPE_NAME(type) : "(unknown)", + type); + ret = 0; + } else { + ret = (*ep->is)(data, cnt); + if (encrypt_debug_mode) + printf("(*ep->is)(%x, %d) returned %s(%d)\n", data, cnt, + (ret < 0) ? "FAIL " : + (ret == 0) ? "SUCCESS " : "MORE_TO_DO ", ret); + } + if (ret < 0) { + autodecrypt = 0; + } else { + decrypt_mode = type; + if (ret == 0 && autodecrypt) + encrypt_send_request_start(); + } +} + + void +encrypt_reply(data, cnt) + unsigned char *data; + int cnt; +{ + Encryptions *ep; + register int ret, type; + + if (--cnt < 0) + return; + type = *data++; + if (!(ep = findencryption(type))) { + if (encrypt_debug_mode) + printf(">>>%s: Can't find type %s (%d) for initial negotiation\r\n", + Name, + ENCTYPE_NAME_OK(type) + ? ENCTYPE_NAME(type) : "(unknown)", + type); + return; + } + if (!ep->reply) { + if (encrypt_debug_mode) + printf(">>>%s: No initial negotiation needed for type %s (%d)\r\n", + Name, + ENCTYPE_NAME_OK(type) + ? ENCTYPE_NAME(type) : "(unknown)", + type); + ret = 0; + } else { + ret = (*ep->reply)(data, cnt); + if (encrypt_debug_mode) + printf("(*ep->reply)(%x, %d) returned %s(%d)\n", + data, cnt, + (ret < 0) ? "FAIL " : + (ret == 0) ? "SUCCESS " : "MORE_TO_DO ", ret); + } + if (encrypt_debug_mode) + printf(">>>%s: encrypt_reply returned %d\n", Name, ret); + if (ret < 0) { + autoencrypt = 0; + } else { + encrypt_mode = type; + if (ret == 0 && autoencrypt) + encrypt_start_output(type); + } +} + +/* + * Called when a ENCRYPT START command is received. + */ + void +encrypt_start(data, cnt) + unsigned char *data; + int cnt; +{ + Encryptions *ep; + + if (!decrypt_mode) { + /* + * Something is wrong. We should not get a START + * command without having already picked our + * decryption scheme. Send a REQUEST-END to + * attempt to clear the channel... + */ + printf("%s: Warning, Cannot decrypt input stream!!!\r\n", Name); + encrypt_send_request_end(); + return; + } + + if (ep = finddecryption(decrypt_mode)) { + decrypt_input = ep->input; + if (encrypt_verbose) + printf("[ Input is now decrypted with type %s ]\r\n", + ENCTYPE_NAME(decrypt_mode)); + if (encrypt_debug_mode) + printf(">>>%s: Start to decrypt input with type %s\r\n", + Name, ENCTYPE_NAME(decrypt_mode)); + } else { + printf("%s: Warning, Cannot decrypt type %s (%d)!!!\r\n", + Name, + ENCTYPE_NAME_OK(decrypt_mode) + ? ENCTYPE_NAME(decrypt_mode) + : "(unknown)", + decrypt_mode); + encrypt_send_request_end(); + } +} + + void +encrypt_session_key(key, server) + Session_Key *key; + int server; +{ + Encryptions *ep = encryptions; + + havesessionkey = 1; + + while (ep->type) { + if (ep->session) + (*ep->session)(key, server); +#ifdef notdef + if (!encrypt_output && autoencrypt && !server) + encrypt_start_output(ep->type); + if (!decrypt_input && autodecrypt && !server) + encrypt_send_request_start(); +#endif + ++ep; + } +} + +/* + * Called when ENCRYPT END is received. + */ + void +encrypt_end() +{ + decrypt_input = 0; + if (encrypt_debug_mode) + printf(">>>%s: Input is back to clear text\r\n", Name); + if (encrypt_verbose) + printf("[ Input is now clear text ]\r\n"); +} + +/* + * Called when ENCRYPT REQUEST-END is received. + */ + void +encrypt_request_end() +{ + encrypt_send_end(); +} + +/* + * Called when ENCRYPT REQUEST-START is received. If we receive + * this before a type is picked, then that indicates that the + * other side wants us to start encrypting data as soon as we + * can. + */ + void +encrypt_request_start(data, cnt) + unsigned char *data; + int cnt; +{ + if (encrypt_mode == 0) { + if (Server) + autoencrypt = 1; + return; + } + encrypt_start_output(encrypt_mode); +} + +static unsigned char str_keyid[(MAXKEYLEN*2)+5] = { IAC, SB, TELOPT_ENCRYPT }; + +encrypt_enc_keyid(keyid, len) + unsigned char *keyid; + int len; +{ + encrypt_keyid(&ki[1], keyid, len); +} + +encrypt_dec_keyid(keyid, len) + unsigned char *keyid; + int len; +{ + encrypt_keyid(&ki[0], keyid, len); +} + +encrypt_keyid(kp, keyid, len) + struct key_info *kp; + unsigned char *keyid; + int len; +{ + Encryptions *ep; + unsigned char *strp, *cp; + int dir = kp->dir; + register int ret = 0; + + if (!(ep = (*kp->getcrypt)(*kp->modep))) { + if (len == 0) + return; + kp->keylen = 0; + } else if (len == 0) { + /* + * Empty option, indicates a failure. + */ + if (kp->keylen == 0) + return; + kp->keylen = 0; + if (ep->keyid) + (void)(*ep->keyid)(dir, kp->keyid, &kp->keylen); + + } else if ((len != kp->keylen) || + (memcmp(keyid, kp->keyid, len) != 0)) { + /* + * Length or contents are different + */ + kp->keylen = len; + memmove(kp->keyid, keyid, len); + if (ep->keyid) + (void)(*ep->keyid)(dir, kp->keyid, &kp->keylen); + } else { + if (ep->keyid) + ret = (*ep->keyid)(dir, kp->keyid, &kp->keylen); + if ((ret == 0) && (dir == DIR_ENCRYPT) && autoencrypt) + encrypt_start_output(*kp->modep); + return; + } + + encrypt_send_keyid(dir, kp->keyid, kp->keylen, 0); +} + + void +encrypt_send_keyid(dir, keyid, keylen, saveit) + int dir; + unsigned char *keyid; + int keylen; + int saveit; +{ + unsigned char *strp; + + str_keyid[3] = (dir == DIR_ENCRYPT) + ? ENCRYPT_ENC_KEYID : ENCRYPT_DEC_KEYID; + if (saveit) { + struct key_info *kp = &ki[(dir == DIR_ENCRYPT) ? 0 : 1]; + memmove(kp->keyid, keyid, keylen); + kp->keylen = keylen; + } + + for (strp = &str_keyid[4]; keylen > 0; --keylen) { + if ((*strp++ = *keyid++) == IAC) + *strp++ = IAC; + } + *strp++ = IAC; + *strp++ = SE; + net_write(str_keyid, strp - str_keyid); + printsub('>', &str_keyid[2], strp - str_keyid - 2); +} + + void +encrypt_auto(on) + int on; +{ + if (on < 0) + autoencrypt ^= 1; + else + autoencrypt = on ? 1 : 0; +} + + void +decrypt_auto(on) + int on; +{ + if (on < 0) + autodecrypt ^= 1; + else + autodecrypt = on ? 1 : 0; +} + + void +encrypt_start_output(type) + int type; +{ + Encryptions *ep; + register unsigned char *p; + register int i; + + if (!(ep = findencryption(type))) { + if (encrypt_debug_mode) { + printf(">>>%s: Can't encrypt with type %s (%d)\r\n", + Name, + ENCTYPE_NAME_OK(type) + ? ENCTYPE_NAME(type) : "(unknown)", + type); + } + return; + } + if (ep->start) { + i = (*ep->start)(DIR_ENCRYPT, Server); + if (encrypt_debug_mode) { + printf(">>>%s: Encrypt start: %s (%d) %s\r\n", + Name, + (i < 0) ? "failed" : + "initial negotiation in progress", + i, ENCTYPE_NAME(type)); + } + if (i) + return; + } + p = str_start + 3; + *p++ = ENCRYPT_START; + for (i = 0; i < ki[0].keylen; ++i) { + if ((*p++ = ki[0].keyid[i]) == IAC) + *p++ = IAC; + } + *p++ = IAC; + *p++ = SE; + net_write(str_start, p - str_start); + net_encrypt(); + printsub('>', &str_start[2], p - &str_start[2]); + /* + * If we are already encrypting in some mode, then + * encrypt the ring (which includes our request) in + * the old mode, mark it all as "clear text" and then + * switch to the new mode. + */ + encrypt_output = ep->output; + encrypt_mode = type; + if (encrypt_debug_mode) + printf(">>>%s: Started to encrypt output with type %s\r\n", + Name, ENCTYPE_NAME(type)); + if (encrypt_verbose) + printf("[ Output is now encrypted with type %s ]\r\n", + ENCTYPE_NAME(type)); +} + + void +encrypt_send_end() +{ + if (!encrypt_output) + return; + + str_end[3] = ENCRYPT_END; + net_write(str_end, sizeof(str_end)); + net_encrypt(); + printsub('>', &str_end[2], sizeof(str_end) - 2); + /* + * Encrypt the output buffer now because it will not be done by + * netflush... + */ + encrypt_output = 0; + if (encrypt_debug_mode) + printf(">>>%s: Output is back to clear text\r\n", Name); + if (encrypt_verbose) + printf("[ Output is now clear text ]\r\n"); +} + + void +encrypt_send_request_start() +{ + register unsigned char *p; + register int i; + + p = &str_start[3]; + *p++ = ENCRYPT_REQSTART; + for (i = 0; i < ki[1].keylen; ++i) { + if ((*p++ = ki[1].keyid[i]) == IAC) + *p++ = IAC; + } + *p++ = IAC; + *p++ = SE; + net_write(str_start, p - str_start); + printsub('>', &str_start[2], p - &str_start[2]); + if (encrypt_debug_mode) + printf(">>>%s: Request input to be encrypted\r\n", Name); +} + + void +encrypt_send_request_end() +{ + str_end[3] = ENCRYPT_REQEND; + net_write(str_end, sizeof(str_end)); + printsub('>', &str_end[2], sizeof(str_end) - 2); + + if (encrypt_debug_mode) + printf(">>>%s: Request input to be clear text\r\n", Name); +} + + void +encrypt_wait() +{ + register int encrypt, decrypt; + if (encrypt_debug_mode) + printf(">>>%s: in encrypt_wait\r\n", Name); + if (!havesessionkey || !(I_SUPPORT_ENCRYPT & remote_supports_decrypt)) + return; + while (autoencrypt && !encrypt_output) + if (telnet_spin()) + return; +} + + void +encrypt_debug(mode) + int mode; +{ + encrypt_debug_mode = mode; +} + + void +encrypt_gen_printsub(data, cnt, buf, buflen) + unsigned char *data, *buf; + int cnt, buflen; +{ + char tbuf[16], *cp; + + cnt -= 2; + data += 2; + buf[buflen-1] = '\0'; + buf[buflen-2] = '*'; + buflen -= 2;; + for (; cnt > 0; cnt--, data++) { + sprintf(tbuf, " %d", *data); + for (cp = tbuf; *cp && buflen > 0; --buflen) + *buf++ = *cp++; + if (buflen <= 0) + return; + } + *buf = '\0'; +} + + void +encrypt_printsub(data, cnt, buf, buflen) + unsigned char *data, *buf; + int cnt, buflen; +{ + Encryptions *ep; + register int type = data[1]; + + for (ep = encryptions; ep->type && ep->type != type; ep++) + ; + + if (ep->printsub) + (*ep->printsub)(data, cnt, buf, buflen); + else + encrypt_gen_printsub(data, cnt, buf, buflen); +} +#endif /* ENCRYPTION */ diff --git a/libtelnet/encrypt.h b/libtelnet/encrypt.h new file mode 100644 index 0000000..e0ae385 --- /dev/null +++ b/libtelnet/encrypt.h @@ -0,0 +1,108 @@ +/*- + * Copyright (c) 1991, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)encrypt.h 8.1 (Berkeley) 6/4/93 + */ + +/* + * Copyright (C) 1990 by the Massachusetts Institute of Technology + * + * Export of this software from the United States of America is assumed + * to require a specific license from the United States Government. + * It is the responsibility of any person or organization contemplating + * export to obtain such a license before exporting. + * + * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and + * distribute this software and its documentation for any purpose and + * without fee is hereby granted, provided that the above copyright + * notice appear in all copies and that both that copyright notice and + * this permission notice appear in supporting documentation, and that + * the name of M.I.T. not be used in advertising or publicity pertaining + * to distribution of the software without specific, written prior + * permission. M.I.T. makes no representations about the suitability of + * this software for any purpose. It is provided "as is" without express + * or implied warranty. + */ + +#ifdef ENCRYPTION +# ifndef __ENCRYPTION__ +# define __ENCRYPTION__ + +#define DIR_DECRYPT 1 +#define DIR_ENCRYPT 2 + +typedef unsigned char Block[8]; +typedef unsigned char *BlockT; +typedef struct { Block _; } Schedule[16]; + +#define VALIDKEY(key) ( key[0] | key[1] | key[2] | key[3] | \ + key[4] | key[5] | key[6] | key[7]) + +#define SAMEKEY(k1, k2) (!bcmp((void *)k1, (void *)k2, sizeof(Block))) + +typedef struct { + short type; + int length; + unsigned char *data; +} Session_Key; + +# if !defined(P) +# ifdef __STDC__ +# define P(x) x +# else +# define P(x) () +# endif +# endif + +typedef struct { + char *name; + int type; + void (*output) P((unsigned char *, int)); + int (*input) P((int)); + void (*init) P((int)); + int (*start) P((int, int)); + int (*is) P((unsigned char *, int)); + int (*reply) P((unsigned char *, int)); + void (*session) P((Session_Key *, int)); + int (*keyid) P((int, unsigned char *, int *)); + void (*printsub) P((unsigned char *, int, unsigned char *, int)); +} Encryptions; + +#define SK_DES 1 /* Matched Kerberos v5 KEYTYPE_DES */ + +#include "enc-proto.h" + +extern int encrypt_debug_mode; +extern int (*decrypt_input) P((int)); +extern void (*encrypt_output) P((unsigned char *, int)); +# endif /* __ENCRYPTION__ */ +#endif /* ENCRYPTION */ diff --git a/libtelnet/genget.c b/libtelnet/genget.c new file mode 100644 index 0000000..7be3846 --- /dev/null +++ b/libtelnet/genget.c @@ -0,0 +1,105 @@ +/*- + * Copyright (c) 1991, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)genget.c 8.2 (Berkeley) 5/30/95"; +#endif /* not lint */ + + +#include + +#define LOWER(x) (isupper(x) ? tolower(x) : (x)) +/* + * The prefix function returns 0 if *s1 is not a prefix + * of *s2. If *s1 exactly matches *s2, the negative of + * the length is returned. If *s1 is a prefix of *s2, + * the length of *s1 is returned. + */ + int +isprefix(s1, s2) + register char *s1, *s2; +{ + register int n = 0; + char *os1; + register char c1, c2; + + if (*s1 == '\0') + return(-1); + os1 = s1; + c1 = *s1; + c2 = *s2; + while (LOWER(c1) == LOWER(c2)) { + if (c1 == '\0') + break; + c1 = *++s1; + c2 = *++s2; + } + return(*s1 ? 0 : (*s2 ? (s1 - os1) : (os1 - s1))); +} + +static char *ambiguous; /* special return value for command routines */ + + char ** +genget(name, table, stlen) + char *name; /* name to match */ + char **table; /* name entry in table */ + int stlen; +{ + register char **c, **found; + register int n; + + if (name == 0) + return 0; + + found = 0; + for (c = table; *c != 0; c = (char **)((char *)c + stlen)) { + if ((n = isprefix(name, *c)) == 0) + continue; + if (n < 0) /* exact match */ + return(c); + if (found) + return(&ambiguous); + found = c; + } + return(found); +} + +/* + * Function call version of Ambiguous() + */ + int +Ambiguous(s) + char *s; +{ + return((char **)s == &ambiguous); +} diff --git a/libtelnet/getent.c b/libtelnet/getent.c new file mode 100644 index 0000000..05626f1 --- /dev/null +++ b/libtelnet/getent.c @@ -0,0 +1,68 @@ +/*- + * Copyright (c) 1991, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)getent.c 8.2 (Berkeley) 12/15/93"; +#endif /* not lint */ + +static char *area; + +/*ARGSUSED*/ +getent(cp, name) +char *cp, *name; +{ +#ifdef HAS_CGETENT + char *dba[2]; + + dba[0] = "/etc/gettytab"; + dba[1] = 0; + return((cgetent(&area, dba, name) == 0) ? 1 : 0); +#else + return(0); +#endif +} + +#ifndef SOLARIS +/*ARGSUSED*/ +char * +getstr(id, cpp) +char *id, **cpp; +{ +# ifdef HAS_CGETENT + char *answer; + return((cgetstr(area, id, &answer) > 0) ? answer : 0); +# else + return(0); +# endif +} +#endif diff --git a/libtelnet/kerberos.c b/libtelnet/kerberos.c new file mode 100644 index 0000000..dbf4956 --- /dev/null +++ b/libtelnet/kerberos.c @@ -0,0 +1,560 @@ +/*- + * Copyright (c) 1991, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)kerberos.c 8.3 (Berkeley) 5/30/95"; +#endif /* not lint */ + +/* + * Copyright (C) 1990 by the Massachusetts Institute of Technology + * + * Export of this software from the United States of America is assumed + * to require a specific license from the United States Government. + * It is the responsibility of any person or organization contemplating + * export to obtain such a license before exporting. + * + * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and + * distribute this software and its documentation for any purpose and + * without fee is hereby granted, provided that the above copyright + * notice appear in all copies and that both that copyright notice and + * this permission notice appear in supporting documentation, and that + * the name of M.I.T. not be used in advertising or publicity pertaining + * to distribution of the software without specific, written prior + * permission. M.I.T. makes no representations about the suitability of + * this software for any purpose. It is provided "as is" without express + * or implied warranty. + */ + +#ifdef KRB4 +#include +#include +#include +#include /* BSD wont include this in krb.h, so we do it here */ +#include +#ifdef __STDC__ +#include +#endif +#ifdef NO_STRING_H +#include +#else +#include +#endif + +#include "encrypt.h" +#include "auth.h" +#include "misc.h" + +int kerberos4_cksum P((unsigned char *, int)); +int krb_mk_req P((KTEXT, char *, char *, char *, u_long)); +int krb_rd_req P((KTEXT, char *, char *, u_long, AUTH_DAT *, char *)); +int krb_kntoln P((AUTH_DAT *, char *)); +int krb_get_cred P((char *, char *, char *, CREDENTIALS *)); +int krb_get_lrealm P((char *, int)); +int kuserok P((AUTH_DAT *, char *)); + +extern auth_debug_mode; + +static unsigned char str_data[1024] = { IAC, SB, TELOPT_AUTHENTICATION, 0, + AUTHTYPE_KERBEROS_V4, }; +static unsigned char str_name[1024] = { IAC, SB, TELOPT_AUTHENTICATION, + TELQUAL_NAME, }; + +#define KRB_AUTH 0 /* Authentication data follows */ +#define KRB_REJECT 1 /* Rejected (reason might follow) */ +#define KRB_ACCEPT 2 /* Accepted */ +#define KRB_CHALLENGE 3 /* Challenge for mutual auth. */ +#define KRB_RESPONSE 4 /* Response for mutual auth. */ + +#define KRB_SERVICE_NAME "rcmd" + +static KTEXT_ST auth; +static char name[ANAME_SZ]; +static AUTH_DAT adat = { 0 }; +#ifdef ENCRYPTION +static Block session_key = { 0 }; +static Schedule sched; +static Block challenge = { 0 }; +#endif /* ENCRYPTION */ + + static int +Data(ap, type, d, c) + Authenticator *ap; + int type; + void *d; + int c; +{ + unsigned char *p = str_data + 4; + unsigned char *cd = (unsigned char *)d; + + if (c == -1) + c = strlen((char *)cd); + + if (auth_debug_mode) { + printf("%s:%d: [%d] (%d)", + str_data[3] == TELQUAL_IS ? ">>>IS" : ">>>REPLY", + str_data[3], + type, c); + printd(d, c); + printf("\r\n"); + } + *p++ = ap->type; + *p++ = ap->way; + *p++ = type; + while (c-- > 0) { + if ((*p++ = *cd++) == IAC) + *p++ = IAC; + } + *p++ = IAC; + *p++ = SE; + if (str_data[3] == TELQUAL_IS) + printsub('>', &str_data[2], p - (&str_data[2])); + return(net_write(str_data, p - str_data)); +} + + int +kerberos4_init(ap, server) + Authenticator *ap; + int server; +{ + FILE *fp; + + if (server) { + str_data[3] = TELQUAL_REPLY; + if ((fp = fopen(KEYFILE, "r")) == NULL) + return(0); + fclose(fp); + } else { + str_data[3] = TELQUAL_IS; + } + return(1); +} + +char dst_realm_buf[REALM_SZ], *dest_realm = NULL; +int dst_realm_sz = REALM_SZ; + + int +kerberos4_send(ap) + Authenticator *ap; +{ + KTEXT_ST auth; +#ifdef ENCRYPTION + Block enckey; +#endif /* ENCRYPTION */ + char instance[INST_SZ]; + char *realm; + char *krb_realmofhost(); + char *krb_get_phost(); + CREDENTIALS cred; + int r; + + printf("[ Trying KERBEROS4 ... ]\n"); + if (!UserNameRequested) { + if (auth_debug_mode) { + printf("Kerberos V4: no user name supplied\r\n"); + } + return(0); + } + + memset(instance, 0, sizeof(instance)); + + if (realm = krb_get_phost(RemoteHostName)) + strncpy(instance, realm, sizeof(instance)); + + instance[sizeof(instance)-1] = '\0'; + + realm = dest_realm ? dest_realm : krb_realmofhost(RemoteHostName); + + if (!realm) { + printf("Kerberos V4: no realm for %s\r\n", RemoteHostName); + return(0); + } + if (r = krb_mk_req(&auth, KRB_SERVICE_NAME, instance, realm, 0L)) { + printf("mk_req failed: %s\r\n", krb_err_txt[r]); + return(0); + } + if (r = krb_get_cred(KRB_SERVICE_NAME, instance, realm, &cred)) { + printf("get_cred failed: %s\r\n", krb_err_txt[r]); + return(0); + } + if (!auth_sendname(UserNameRequested, strlen(UserNameRequested))) { + if (auth_debug_mode) + printf("Not enough room for user name\r\n"); + return(0); + } + if (auth_debug_mode) + printf("Sent %d bytes of authentication data\r\n", auth.length); + if (!Data(ap, KRB_AUTH, (void *)auth.dat, auth.length)) { + if (auth_debug_mode) + printf("Not enough room for authentication data\r\n"); + return(0); + } +#ifdef ENCRYPTION + /* + * If we are doing mutual authentication, get set up to send + * the challenge, and verify it when the response comes back. + */ + if ((ap->way & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) { + register int i; + + des_key_sched(cred.session, sched); + des_init_random_number_generator(cred.session); + des_new_random_key(session_key); + des_ecb_encrypt(session_key, session_key, sched, 0); + des_ecb_encrypt(session_key, challenge, sched, 0); + /* + * Increment the challenge by 1, and encrypt it for + * later comparison. + */ + for (i = 7; i >= 0; --i) { + register int x; + x = (unsigned int)challenge[i] + 1; + challenge[i] = x; /* ignore overflow */ + if (x < 256) /* if no overflow, all done */ + break; + } + des_ecb_encrypt(challenge, challenge, sched, 1); + } +#endif /* ENCRYPTION */ + + if (auth_debug_mode) { + printf("CK: %d:", kerberos4_cksum(auth.dat, auth.length)); + printd(auth.dat, auth.length); + printf("\r\n"); + printf("Sent Kerberos V4 credentials to server\r\n"); + } + return(1); +} + + void +kerberos4_is(ap, data, cnt) + Authenticator *ap; + unsigned char *data; + int cnt; +{ +#ifdef ENCRYPTION + Session_Key skey; + Block datablock; +#endif /* ENCRYPTION */ + char realm[REALM_SZ]; + char instance[INST_SZ]; + int r; + + if (cnt-- < 1) + return; + switch (*data++) { + case KRB_AUTH: + if (krb_get_lrealm(realm, 1) != KSUCCESS) { + Data(ap, KRB_REJECT, (void *)"No local V4 Realm.", -1); + auth_finished(ap, AUTH_REJECT); + if (auth_debug_mode) + printf("No local realm\r\n"); + return; + } + memmove((void *)auth.dat, (void *)data, auth.length = cnt); + if (auth_debug_mode) { + printf("Got %d bytes of authentication data\r\n", cnt); + printf("CK: %d:", kerberos4_cksum(auth.dat, auth.length)); + printd(auth.dat, auth.length); + printf("\r\n"); + } + instance[0] = '*'; instance[1] = 0; + if (r = krb_rd_req(&auth, KRB_SERVICE_NAME, + instance, 0, &adat, "")) { + if (auth_debug_mode) + printf("Kerberos failed him as %s\r\n", name); + Data(ap, KRB_REJECT, (void *)krb_err_txt[r], -1); + auth_finished(ap, AUTH_REJECT); + return; + } +#ifdef ENCRYPTION + memmove((void *)session_key, (void *)adat.session, sizeof(Block)); +#endif /* ENCRYPTION */ + krb_kntoln(&adat, name); + + if (UserNameRequested && !kuserok(&adat, UserNameRequested)) + Data(ap, KRB_ACCEPT, (void *)0, 0); + else + Data(ap, KRB_REJECT, + (void *)"user is not authorized", -1); + auth_finished(ap, AUTH_USER); + break; + + case KRB_CHALLENGE: +#ifndef ENCRYPTION + Data(ap, KRB_RESPONSE, (void *)0, 0); +#else /* ENCRYPTION */ + if (!VALIDKEY(session_key)) { + /* + * We don't have a valid session key, so just + * send back a response with an empty session + * key. + */ + Data(ap, KRB_RESPONSE, (void *)0, 0); + break; + } + + /* + * Initialize the random number generator since it's + * used later on by the encryption routine. + */ + des_init_random_number_generator(session_key); + des_key_sched(session_key, sched); + memmove((void *)datablock, (void *)data, sizeof(Block)); + /* + * Take the received encrypted challenge, and encrypt + * it again to get a unique session_key for the + * ENCRYPT option. + */ + des_ecb_encrypt(datablock, session_key, sched, 1); + skey.type = SK_DES; + skey.length = 8; + skey.data = session_key; + encrypt_session_key(&skey, 1); + /* + * Now decrypt the received encrypted challenge, + * increment by one, re-encrypt it and send it back. + */ + des_ecb_encrypt(datablock, challenge, sched, 0); + for (r = 7; r >= 0; r--) { + register int t; + t = (unsigned int)challenge[r] + 1; + challenge[r] = t; /* ignore overflow */ + if (t < 256) /* if no overflow, all done */ + break; + } + des_ecb_encrypt(challenge, challenge, sched, 1); + Data(ap, KRB_RESPONSE, (void *)challenge, sizeof(challenge)); +#endif /* ENCRYPTION */ + break; + + default: + if (auth_debug_mode) + printf("Unknown Kerberos option %d\r\n", data[-1]); + Data(ap, KRB_REJECT, 0, 0); + break; + } +} + + void +kerberos4_reply(ap, data, cnt) + Authenticator *ap; + unsigned char *data; + int cnt; +{ +#ifdef ENCRYPTION + Session_Key skey; +#endif /* ENCRYPTION */ + + if (cnt-- < 1) + return; + switch (*data++) { + case KRB_REJECT: + if (cnt > 0) { + printf("[ Kerberos V4 refuses authentication because %.*s ]\r\n", + cnt, data); + } else + printf("[ Kerberos V4 refuses authentication ]\r\n"); + auth_send_retry(); + return; + case KRB_ACCEPT: + printf("[ Kerberos V4 accepts you ]\n"); + if ((ap->way & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) { + /* + * Send over the encrypted challenge. + */ +#ifndef ENCRYPTION + Data(ap, KRB_CHALLENGE, (void *)0, 0); +#else /* ENCRYPTION */ + Data(ap, KRB_CHALLENGE, (void *)session_key, + sizeof(session_key)); + des_ecb_encrypt(session_key, session_key, sched, 1); + skey.type = SK_DES; + skey.length = 8; + skey.data = session_key; + encrypt_session_key(&skey, 0); +#endif /* ENCRYPTION */ + return; + } + auth_finished(ap, AUTH_USER); + return; + case KRB_RESPONSE: +#ifdef ENCRYPTION + /* + * Verify that the response to the challenge is correct. + */ + if ((cnt != sizeof(Block)) || + (0 != memcmp((void *)data, (void *)challenge, + sizeof(challenge)))) + { +#endif /* ENCRYPTION */ + printf("[ Kerberos V4 challenge failed!!! ]\r\n"); + auth_send_retry(); + return; +#ifdef ENCRYPTION + } + printf("[ Kerberos V4 challenge successful ]\r\n"); + auth_finished(ap, AUTH_USER); +#endif /* ENCRYPTION */ + break; + default: + if (auth_debug_mode) + printf("Unknown Kerberos option %d\r\n", data[-1]); + return; + } +} + + int +kerberos4_status(ap, name, level) + Authenticator *ap; + char *name; + int level; +{ + if (level < AUTH_USER) + return(level); + + if (UserNameRequested && !kuserok(&adat, UserNameRequested)) { + strcpy(name, UserNameRequested); + return(AUTH_VALID); + } else + return(AUTH_USER); +} + +#define BUMP(buf, len) while (*(buf)) {++(buf), --(len);} +#define ADDC(buf, len, c) if ((len) > 0) {*(buf)++ = (c); --(len);} + + void +kerberos4_printsub(data, cnt, buf, buflen) + unsigned char *data, *buf; + int cnt, buflen; +{ + char lbuf[32]; + register int i; + + buf[buflen-1] = '\0'; /* make sure its NULL terminated */ + buflen -= 1; + + switch(data[3]) { + case KRB_REJECT: /* Rejected (reason might follow) */ + strncpy((char *)buf, " REJECT ", buflen); + goto common; + + case KRB_ACCEPT: /* Accepted (name might follow) */ + strncpy((char *)buf, " ACCEPT ", buflen); + common: + BUMP(buf, buflen); + if (cnt <= 4) + break; + ADDC(buf, buflen, '"'); + for (i = 4; i < cnt; i++) + ADDC(buf, buflen, data[i]); + ADDC(buf, buflen, '"'); + ADDC(buf, buflen, '\0'); + break; + + case KRB_AUTH: /* Authentication data follows */ + strncpy((char *)buf, " AUTH", buflen); + goto common2; + + case KRB_CHALLENGE: + strncpy((char *)buf, " CHALLENGE", buflen); + goto common2; + + case KRB_RESPONSE: + strncpy((char *)buf, " RESPONSE", buflen); + goto common2; + + default: + sprintf(lbuf, " %d (unknown)", data[3]); + strncpy((char *)buf, lbuf, buflen); + common2: + BUMP(buf, buflen); + for (i = 4; i < cnt; i++) { + sprintf(lbuf, " %d", data[i]); + strncpy((char *)buf, lbuf, buflen); + BUMP(buf, buflen); + } + break; + } +} + + int +kerberos4_cksum(d, n) + unsigned char *d; + int n; +{ + int ck = 0; + + /* + * A comment is probably needed here for those not + * well versed in the "C" language. Yes, this is + * supposed to be a "switch" with the body of the + * "switch" being a "while" statement. The whole + * purpose of the switch is to allow us to jump into + * the middle of the while() loop, and then not have + * to do any more switch()s. + * + * Some compilers will spit out a warning message + * about the loop not being entered at the top. + */ + switch (n&03) + while (n > 0) { + case 0: + ck ^= (int)*d++ << 24; + --n; + case 3: + ck ^= (int)*d++ << 16; + --n; + case 2: + ck ^= (int)*d++ << 8; + --n; + case 1: + ck ^= (int)*d++; + --n; + } + return(ck); +} +#endif + +#ifdef notdef + +prkey(msg, key) + char *msg; + unsigned char *key; +{ + register int i; + printf("%s:", msg); + for (i = 0; i < 8; i++) + printf(" %3d", key[i]); + printf("\r\n"); +} +#endif diff --git a/libtelnet/kerberos5.c b/libtelnet/kerberos5.c new file mode 100644 index 0000000..bcf1a9f --- /dev/null +++ b/libtelnet/kerberos5.c @@ -0,0 +1,764 @@ +/* + * $Source: /mit/krb5/.cvsroot/src/appl/telnet/libtelnet/kerberos5.c,v $ + * $Author: tytso $ + * $Id: kerberos5.c,v 1.1 1997/09/04 06:11:15 markm Exp $ + */ + +#if !defined(lint) && !defined(SABER) +static +#ifdef __STDC__ +const +#endif +char rcsid_kerberos5_c[] = "$Id: kerberos5.c,v 1.1 1997/09/04 06:11:15 markm Exp $"; +#endif /* lint */ + +/*- + * Copyright (c) 1991, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)kerberos5.c 8.3 (Berkeley) 5/30/95"; +#endif /* not lint */ + +/* + * Copyright (C) 1990 by the Massachusetts Institute of Technology + * + * Export of this software from the United States of America may + * require a specific license from the United States Government. + * It is the responsibility of any person or organization contemplating + * export to obtain such a license before exporting. + * + * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and + * distribute this software and its documentation for any purpose and + * without fee is hereby granted, provided that the above copyright + * notice appear in all copies and that both that copyright notice and + * this permission notice appear in supporting documentation, and that + * the name of M.I.T. not be used in advertising or publicity pertaining + * to distribution of the software without specific, written prior + * permission. M.I.T. makes no representations about the suitability of + * this software for any purpose. It is provided "as is" without express + * or implied warranty. + */ + + +#ifdef KRB5 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* kerberos 5 include files (ext-proto.h) will get an appropriate stdlib.h + and string.h/strings.h */ + +#include "encrypt.h" +#include "auth.h" +#include "misc.h" + +extern auth_debug_mode; + +#ifdef FORWARD +int forward_flags = 0; /* Flags get set in telnet/main.c on -f and -F */ + +/* These values need to be the same as those defined in telnet/main.c. */ +/* Either define them in both places, or put in some common header file. */ +#define OPTS_FORWARD_CREDS 0x00000002 +#define OPTS_FORWARDABLE_CREDS 0x00000001 + +void kerberos5_forward(); + +#endif /* FORWARD */ + +static unsigned char str_data[1024] = { IAC, SB, TELOPT_AUTHENTICATION, 0, + AUTHTYPE_KERBEROS_V5, }; +/*static unsigned char str_name[1024] = { IAC, SB, TELOPT_AUTHENTICATION, + TELQUAL_NAME, };*/ + +#define KRB_AUTH 0 /* Authentication data follows */ +#define KRB_REJECT 1 /* Rejected (reason might follow) */ +#define KRB_ACCEPT 2 /* Accepted */ +#define KRB_RESPONSE 3 /* Response for mutual auth. */ + +#ifdef FORWARD +#define KRB_FORWARD 4 /* Forwarded credentials follow */ +#define KRB_FORWARD_ACCEPT 5 /* Forwarded credentials accepted */ +#define KRB_FORWARD_REJECT 6 /* Forwarded credentials rejected */ +#endif /* FORWARD */ + +static krb5_data auth; + /* telnetd gets session key from here */ +static krb5_tkt_authent *authdat = NULL; +/* telnet matches the AP_REQ and AP_REP with this */ +static krb5_authenticator authenticator; + +/* some compilers can't hack void *, so we use the Kerberos krb5_pointer, + which is either void * or char *, depending on the compiler. */ + +#define Voidptr krb5_pointer + +Block session_key; + + static int +Data(ap, type, d, c) + Authenticator *ap; + int type; + Voidptr d; + int c; +{ + unsigned char *p = str_data + 4; + unsigned char *cd = (unsigned char *)d; + + if (c == -1) + c = strlen((char *)cd); + + if (auth_debug_mode) { + printf("%s:%d: [%d] (%d)", + str_data[3] == TELQUAL_IS ? ">>>IS" : ">>>REPLY", + str_data[3], + type, c); + printd(d, c); + printf("\r\n"); + } + *p++ = ap->type; + *p++ = ap->way; + *p++ = type; + while (c-- > 0) { + if ((*p++ = *cd++) == IAC) + *p++ = IAC; + } + *p++ = IAC; + *p++ = SE; + if (str_data[3] == TELQUAL_IS) + printsub('>', &str_data[2], p - &str_data[2]); + return(net_write(str_data, p - str_data)); +} + + int +kerberos5_init(ap, server) + Authenticator *ap; + int server; +{ + if (server) + str_data[3] = TELQUAL_REPLY; + else + str_data[3] = TELQUAL_IS; + krb5_init_ets(); + return(1); +} + + int +kerberos5_send(ap) + Authenticator *ap; +{ + char **realms; + char *name; + char *p1, *p2; + krb5_checksum ksum; + krb5_octet sum[CRC32_CKSUM_LENGTH]; + krb5_principal server; + krb5_error_code r; + krb5_ccache ccache; + krb5_creds creds; /* telnet gets session key from here */ + extern krb5_flags krb5_kdc_default_options; + int ap_opts; + +#ifdef ENCRYPTION + krb5_keyblock *newkey = 0; +#endif /* ENCRYPTION */ + + ksum.checksum_type = CKSUMTYPE_CRC32; + ksum.contents = sum; + ksum.length = sizeof(sum); + memset((Voidptr )sum, 0, sizeof(sum)); + + if (!UserNameRequested) { + if (auth_debug_mode) { + printf("Kerberos V5: no user name supplied\r\n"); + } + return(0); + } + + if (r = krb5_cc_default(&ccache)) { + if (auth_debug_mode) { + printf("Kerberos V5: could not get default ccache\r\n"); + } + return(0); + } + + if ((name = malloc(strlen(RemoteHostName)+1)) == NULL) { + if (auth_debug_mode) + printf("Out of memory for hostname in Kerberos V5\r\n"); + return(0); + } + + if (r = krb5_get_host_realm(RemoteHostName, &realms)) { + if (auth_debug_mode) + printf("Kerberos V5: no realm for %s\r\n", RemoteHostName); + free(name); + return(0); + } + + p1 = RemoteHostName; + p2 = name; + + while (*p2 = *p1++) { + if (isupper(*p2)) + *p2 |= 040; + ++p2; + } + + if (r = krb5_build_principal_ext(&server, + strlen(realms[0]), realms[0], + 4, "host", + p2 - name, name, + 0)) { + if (auth_debug_mode) { + printf("Kerberos V5: failure setting up principal (%s)\r\n", + error_message(r)); + } + free(name); + krb5_free_host_realm(realms); + return(0); + } + + + memset((char *)&creds, 0, sizeof(creds)); + creds.server = server; + + if (r = krb5_cc_get_principal(ccache, &creds.client)) { + if (auth_debug_mode) { + printf("Kerberos V5: failure on principal (%s)\r\n", + error_message(r)); + } + free(name); + krb5_free_principal(server); + krb5_free_host_realm(realms); + return(0); + } + + if (r = krb5_get_credentials(krb5_kdc_default_options, ccache, &creds)) { + if (auth_debug_mode) { + printf("Kerberos V5: failure on credentials(%d)\r\n",r); + } + free(name); + krb5_free_host_realm(realms); + krb5_free_principal(server); + return(0); + } + + if ((ap->way & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) + ap_opts = AP_OPTS_MUTUAL_REQUIRED; + else + ap_opts = 0; + + r = krb5_mk_req_extended(ap_opts, &ksum, krb5_kdc_default_options, 0, +#ifdef ENCRYPTION + &newkey, +#else /* ENCRYPTION */ + 0, +#endif /* ENCRYPTION */ + ccache, &creds, &authenticator, &auth); + /* don't let the key get freed if we clean up the authenticator */ + authenticator.subkey = 0; + + free(name); + krb5_free_host_realm(realms); + krb5_free_principal(server); +#ifdef ENCRYPTION + if (newkey) { + /* keep the key in our private storage, but don't use it + yet---see kerberos5_reply() below */ + if (newkey->keytype != KEYTYPE_DES) { + if (creds.keyblock.keytype == KEYTYPE_DES) + /* use the session key in credentials instead */ + memmove((char *)session_key, + (char *)creds.keyblock.contents, sizeof(Block)); + else + /* XXX ? */; + } else { + memmove((char *)session_key, (char *)newkey->contents, + sizeof(Block)); + } + krb5_free_keyblock(newkey); + } +#endif /* ENCRYPTION */ + if (r) { + if (auth_debug_mode) { + printf("Kerberos V5: mk_req failed (%s)\r\n", + error_message(r)); + } + return(0); + } + + if (!auth_sendname(UserNameRequested, strlen(UserNameRequested))) { + if (auth_debug_mode) + printf("Not enough room for user name\r\n"); + return(0); + } + if (!Data(ap, KRB_AUTH, auth.data, auth.length)) { + if (auth_debug_mode) + printf("Not enough room for authentication data\r\n"); + return(0); + } + if (auth_debug_mode) { + printf("Sent Kerberos V5 credentials to server\r\n"); + } + return(1); +} + + void +kerberos5_is(ap, data, cnt) + Authenticator *ap; + unsigned char *data; + int cnt; +{ + int r; + struct hostent *hp; + char *p1, *p2; + static char *realm = NULL; + krb5_principal server; + krb5_ap_rep_enc_part reply; + krb5_data outbuf; +#ifdef ENCRYPTION + Session_Key skey; +#endif /* ENCRYPTION */ + char *name; + char *getenv(); + krb5_data inbuf; + + if (cnt-- < 1) + return; + switch (*data++) { + case KRB_AUTH: + auth.data = (char *)data; + auth.length = cnt; + + if (!(hp = gethostbyname(LocalHostName))) { + if (auth_debug_mode) + printf("Cannot resolve local host name\r\n"); + Data(ap, KRB_REJECT, "Unknown local hostname.", -1); + auth_finished(ap, AUTH_REJECT); + return; + } + + if (!realm && (krb5_get_default_realm(&realm))) { + if (auth_debug_mode) + printf("Could not get default realm\r\n"); + Data(ap, KRB_REJECT, "Could not get default realm.", -1); + auth_finished(ap, AUTH_REJECT); + return; + } + + if ((name = malloc(strlen(hp->h_name)+1)) == NULL) { + if (auth_debug_mode) + printf("Out of memory for hostname in Kerberos V5\r\n"); + Data(ap, KRB_REJECT, "Out of memory.", -1); + auth_finished(ap, AUTH_REJECT); + return; + } + + p1 = hp->h_name; + p2 = name; + + while (*p2 = *p1++) { + if (isupper(*p2)) + *p2 |= 040; + ++p2; + } + + if (authdat) + krb5_free_tkt_authent(authdat); + + r = krb5_build_principal_ext(&server, + strlen(realm), realm, + 4, "host", + p2 - name, name, + 0); + if (!r) { + r = krb5_rd_req_simple(&auth, server, 0, &authdat); + krb5_free_principal(server); + } + if (r) { + char errbuf[128]; + + errout: + authdat = 0; + (void) strcpy(errbuf, "Read req failed: "); + (void) strcat(errbuf, error_message(r)); + Data(ap, KRB_REJECT, errbuf, -1); + if (auth_debug_mode) + printf("%s\r\n", errbuf); + return; + } + free(name); + if ((ap->way & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) { + /* do ap_rep stuff here */ + reply.ctime = authdat->authenticator->ctime; + reply.cusec = authdat->authenticator->cusec; + reply.subkey = 0; /* use the one he gave us, so don't + need to return one here */ + reply.seq_number = 0; /* we don't do seq #'s. */ + + if (r = krb5_mk_rep(&reply, + authdat->authenticator->subkey ? + authdat->authenticator->subkey : + authdat->ticket->enc_part2->session, + &outbuf)) { + goto errout; + } + Data(ap, KRB_RESPONSE, outbuf.data, outbuf.length); + } + if (krb5_unparse_name(authdat->ticket->enc_part2 ->client, + &name)) + name = 0; + Data(ap, KRB_ACCEPT, name, name ? -1 : 0); + if (auth_debug_mode) { + printf("Kerberos5 identifies him as ``%s''\r\n", + name ? name : ""); + } + auth_finished(ap, AUTH_USER); + + free(name); + if (authdat->authenticator->subkey && + authdat->authenticator->subkey->keytype == KEYTYPE_DES) { + memmove((Voidptr )session_key, + (Voidptr )authdat->authenticator->subkey->contents, + sizeof(Block)); + } else if (authdat->ticket->enc_part2->session->keytype == + KEYTYPE_DES) { + memmove((Voidptr )session_key, + (Voidptr )authdat->ticket->enc_part2->session->contents, + sizeof(Block)); + } else + break; + +#ifdef ENCRYPTION + skey.type = SK_DES; + skey.length = 8; + skey.data = session_key; + encrypt_session_key(&skey, 1); +#endif /* ENCRYPTION */ + break; +#ifdef FORWARD + case KRB_FORWARD: + inbuf.data = (char *)data; + inbuf.length = cnt; + if (r = rd_and_store_for_creds(&inbuf, authdat->ticket, + UserNameRequested)) { + char errbuf[128]; + + (void) strcpy(errbuf, "Read forwarded creds failed: "); + (void) strcat(errbuf, error_message(r)); + Data(ap, KRB_FORWARD_REJECT, errbuf, -1); + if (auth_debug_mode) + printf("Could not read forwarded credentials\r\n"); + } + else + Data(ap, KRB_FORWARD_ACCEPT, 0, 0); + if (auth_debug_mode) + printf("Forwarded credentials obtained\r\n"); + break; +#endif /* FORWARD */ + default: + if (auth_debug_mode) + printf("Unknown Kerberos option %d\r\n", data[-1]); + Data(ap, KRB_REJECT, 0, 0); + break; + } +} + + void +kerberos5_reply(ap, data, cnt) + Authenticator *ap; + unsigned char *data; + int cnt; +{ + Session_Key skey; + static int mutual_complete = 0; + + if (cnt-- < 1) + return; + switch (*data++) { + case KRB_REJECT: + if (cnt > 0) { + printf("[ Kerberos V5 refuses authentication because %.*s ]\r\n", + cnt, data); + } else + printf("[ Kerberos V5 refuses authentication ]\r\n"); + auth_send_retry(); + return; + case KRB_ACCEPT: + if ((ap->way & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL && + !mutual_complete) { + printf("[ Kerberos V5 accepted you, but didn't provide mutual authentication! ]\n"); + auth_send_retry(); + return; + } + if (cnt) + printf("[ Kerberos V5 accepts you as ``%.*s'' ]\n", cnt, data); + else + printf("[ Kerberos V5 accepts you ]\n"); + auth_finished(ap, AUTH_USER); +#ifdef FORWARD + if (forward_flags & OPTS_FORWARD_CREDS) + kerberos5_forward(ap); +#endif /* FORWARD */ + break; + case KRB_RESPONSE: + if ((ap->way & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) { + /* the rest of the reply should contain a krb_ap_rep */ + krb5_ap_rep_enc_part *reply; + krb5_data inbuf; + krb5_error_code r; + krb5_keyblock tmpkey; + + inbuf.length = cnt; + inbuf.data = (char *)data; + + tmpkey.keytype = KEYTYPE_DES; + tmpkey.contents = session_key; + tmpkey.length = sizeof(Block); + + if (r = krb5_rd_rep(&inbuf, &tmpkey, &reply)) { + printf("[ Mutual authentication failed: %s ]\n", + error_message(r)); + auth_send_retry(); + return; + } + if (reply->ctime != authenticator.ctime || + reply->cusec != authenticator.cusec) { + printf("[ Mutual authentication failed (mismatched KRB_AP_REP) ]\n"); + auth_send_retry(); + return; + } + krb5_free_ap_rep_enc_part(reply); +#ifdef ENCRYPTION + skey.type = SK_DES; + skey.length = 8; + skey.data = session_key; + encrypt_session_key(&skey, 0); +#endif /* ENCRYPTION */ + mutual_complete = 1; + } + return; +#ifdef FORWARD + case KRB_FORWARD_ACCEPT: + printf("[ Kerberos V5 accepted forwarded credentials ]\n"); + return; + case KRB_FORWARD_REJECT: + printf("[ Kerberos V5 refuses forwarded credentials because %.*s ]\r\n", + cnt, data); + return; +#endif /* FORWARD */ + default: + if (auth_debug_mode) + printf("Unknown Kerberos option %d\r\n", data[-1]); + return; + } +} + + int +kerberos5_status(ap, name, level) + Authenticator *ap; + char *name; + int level; +{ + if (level < AUTH_USER) + return(level); + + if (UserNameRequested && + krb5_kuserok(authdat->ticket->enc_part2->client, UserNameRequested)) + { + strcpy(name, UserNameRequested); + return(AUTH_VALID); + } else + return(AUTH_USER); +} + +#define BUMP(buf, len) while (*(buf)) {++(buf), --(len);} +#define ADDC(buf, len, c) if ((len) > 0) {*(buf)++ = (c); --(len);} + + void +kerberos5_printsub(data, cnt, buf, buflen) + unsigned char *data, *buf; + int cnt, buflen; +{ + char lbuf[32]; + register int i; + + buf[buflen-1] = '\0'; /* make sure its NULL terminated */ + buflen -= 1; + + switch(data[3]) { + case KRB_REJECT: /* Rejected (reason might follow) */ + strncpy((char *)buf, " REJECT ", buflen); + goto common; + + case KRB_ACCEPT: /* Accepted (name might follow) */ + strncpy((char *)buf, " ACCEPT ", buflen); + common: + BUMP(buf, buflen); + if (cnt <= 4) + break; + ADDC(buf, buflen, '"'); + for (i = 4; i < cnt; i++) + ADDC(buf, buflen, data[i]); + ADDC(buf, buflen, '"'); + ADDC(buf, buflen, '\0'); + break; + + + case KRB_AUTH: /* Authentication data follows */ + strncpy((char *)buf, " AUTH", buflen); + goto common2; + + case KRB_RESPONSE: + strncpy((char *)buf, " RESPONSE", buflen); + goto common2; + +#ifdef FORWARD + case KRB_FORWARD: /* Forwarded credentials follow */ + strncpy((char *)buf, " FORWARD", buflen); + goto common2; + + case KRB_FORWARD_ACCEPT: /* Forwarded credentials accepted */ + strncpy((char *)buf, " FORWARD_ACCEPT", buflen); + goto common2; + + case KRB_FORWARD_REJECT: /* Forwarded credentials rejected */ + /* (reason might follow) */ + strncpy((char *)buf, " FORWARD_REJECT", buflen); + goto common2; +#endif /* FORWARD */ + + default: + sprintf(lbuf, " %d (unknown)", data[3]); + strncpy((char *)buf, lbuf, buflen); + common2: + BUMP(buf, buflen); + for (i = 4; i < cnt; i++) { + sprintf(lbuf, " %d", data[i]); + strncpy((char *)buf, lbuf, buflen); + BUMP(buf, buflen); + } + break; + } +} + +#ifdef FORWARD + void +kerberos5_forward(ap) + Authenticator *ap; +{ + struct hostent *hp; + krb5_creds *local_creds; + krb5_error_code r; + krb5_data forw_creds; + extern krb5_cksumtype krb5_kdc_req_sumtype; + krb5_ccache ccache; + int i; + + if (!(local_creds = (krb5_creds *) + calloc(1, sizeof(*local_creds)))) { + if (auth_debug_mode) + printf("Kerberos V5: could not allocate memory for credentials\r\n"); + return; + } + + if (r = krb5_sname_to_principal(RemoteHostName, "host", 1, + &local_creds->server)) { + if (auth_debug_mode) + printf("Kerberos V5: could not build server name - %s\r\n", + error_message(r)); + krb5_free_creds(local_creds); + return; + } + + if (r = krb5_cc_default(&ccache)) { + if (auth_debug_mode) + printf("Kerberos V5: could not get default ccache - %s\r\n", + error_message(r)); + krb5_free_creds(local_creds); + return; + } + + if (r = krb5_cc_get_principal(ccache, &local_creds->client)) { + if (auth_debug_mode) + printf("Kerberos V5: could not get default principal - %s\r\n", + error_message(r)); + krb5_free_creds(local_creds); + return; + } + + /* Get ticket from credentials cache */ + if (r = krb5_get_credentials(KRB5_GC_CACHED, ccache, local_creds)) { + if (auth_debug_mode) + printf("Kerberos V5: could not obtain credentials - %s\r\n", + error_message(r)); + krb5_free_creds(local_creds); + return; + } + + if (r = get_for_creds(ETYPE_DES_CBC_CRC, + krb5_kdc_req_sumtype, + RemoteHostName, + local_creds->client, + &local_creds->keyblock, + forward_flags & OPTS_FORWARDABLE_CREDS, + &forw_creds)) { + if (auth_debug_mode) + printf("Kerberos V5: error getting forwarded creds - %s\r\n", + error_message(r)); + krb5_free_creds(local_creds); + return; + } + + /* Send forwarded credentials */ + if (!Data(ap, KRB_FORWARD, forw_creds.data, forw_creds.length)) { + if (auth_debug_mode) + printf("Not enough room for authentication data\r\n"); + } + else { + if (auth_debug_mode) + printf("Forwarded local Kerberos V5 credentials to server\r\n"); + } + + krb5_free_creds(local_creds); +} +#endif /* FORWARD */ + +#endif /* KRB5 */ diff --git a/libtelnet/key-proto.h b/libtelnet/key-proto.h new file mode 100644 index 0000000..9668a77 --- /dev/null +++ b/libtelnet/key-proto.h @@ -0,0 +1,71 @@ +/*- + * Copyright (c) 1991, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)key-proto.h 8.1 (Berkeley) 6/4/93 + */ + +/* + * Copyright (C) 1990 by the Massachusetts Institute of Technology + * + * Export of this software from the United States of America is assumed + * to require a specific license from the United States Government. + * It is the responsibility of any person or organization contemplating + * export to obtain such a license before exporting. + * + * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and + * distribute this software and its documentation for any purpose and + * without fee is hereby granted, provided that the above copyright + * notice appear in all copies and that both that copyright notice and + * this permission notice appear in supporting documentation, and that + * the name of M.I.T. not be used in advertising or publicity pertaining + * to distribution of the software without specific, written prior + * permission. M.I.T. makes no representations about the suitability of + * this software for any purpose. It is provided "as is" without express + * or implied warranty. + */ + +#ifndef __KEY_PROTO__ +#define __KEY_PROTO__ + +#if !defined(P) +#ifdef __STDC__ +#define P(x) x +#else +#define P(x) () +#endif +#endif + +int key_file_exists P((void)); +void key_lookup P((unsigned char *, Block)); +void key_stream_init P((Block, Block, int)); +unsigned char key_stream P((int, int)); +#endif diff --git a/libtelnet/krb4encpwd.c b/libtelnet/krb4encpwd.c new file mode 100644 index 0000000..6148190 --- /dev/null +++ b/libtelnet/krb4encpwd.c @@ -0,0 +1,446 @@ +/*- + * Copyright (c) 1992, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)krb4encpwd.c 8.3 (Berkeley) 5/30/95"; +#endif /* not lint */ + + +#ifdef KRB4_ENCPWD +/* + * COPYRIGHT (C) 1990 DIGITAL EQUIPMENT CORPORATION + * ALL RIGHTS RESERVED + * + * "Digital Equipment Corporation authorizes the reproduction, + * distribution and modification of this software subject to the following + * restrictions: + * + * 1. Any partial or whole copy of this software, or any modification + * thereof, must include this copyright notice in its entirety. + * + * 2. This software is supplied "as is" with no warranty of any kind, + * expressed or implied, for any purpose, including any warranty of fitness + * or merchantibility. DIGITAL assumes no responsibility for the use or + * reliability of this software, nor promises to provide any form of + * support for it on any basis. + * + * 3. Distribution of this software is authorized only if no profit or + * remuneration of any kind is received in exchange for such distribution. + * + * 4. This software produces public key authentication certificates + * bearing an expiration date established by DIGITAL and RSA Data + * Security, Inc. It may cease to generate certificates after the expiration + * date. Any modification of this software that changes or defeats + * the expiration date or its effect is unauthorized. + * + * 5. Software that will renew or extend the expiration date of + * authentication certificates produced by this software may be obtained + * from RSA Data Security, Inc., 10 Twin Dolphin Drive, Redwood City, CA + * 94065, (415)595-8782, or from DIGITAL" + * + */ + +#include +#include +#include +#include + +#include +#include +#ifdef __STDC__ +#include +#endif +#ifdef NO_STRING_H +#include +#else +#include +#endif + +#include "encrypt.h" +#include "auth.h" +#include "misc.h" + +int krb_mk_encpwd_req P((KTEXT, char *, char *, char *, char *, char *, char *)); +int krb_rd_encpwd_req P((KTEXT, char *, char *, u_long, AUTH_DAT *, char *, char *, char *, char *)); + +extern auth_debug_mode; + +static unsigned char str_data[1024] = { IAC, SB, TELOPT_AUTHENTICATION, 0, + AUTHTYPE_KRB4_ENCPWD, }; +static unsigned char str_name[1024] = { IAC, SB, TELOPT_AUTHENTICATION, + TELQUAL_NAME, }; + +#define KRB4_ENCPWD_AUTH 0 /* Authentication data follows */ +#define KRB4_ENCPWD_REJECT 1 /* Rejected (reason might follow) */ +#define KRB4_ENCPWD_ACCEPT 2 /* Accepted */ +#define KRB4_ENCPWD_CHALLENGE 3 /* Challenge for mutual auth. */ +#define KRB4_ENCPWD_ACK 4 /* Acknowledge */ + +#define KRB_SERVICE_NAME "rcmd" + +static KTEXT_ST auth; +static char name[ANAME_SZ]; +static char user_passwd[ANAME_SZ]; +static AUTH_DAT adat = { 0 }; +#ifdef ENCRYPTION +static Block session_key = { 0 }; +#endif /* ENCRYPTION */ +static Schedule sched; +static char challenge[REALM_SZ]; + + static int +Data(ap, type, d, c) + Authenticator *ap; + int type; + void *d; + int c; +{ + unsigned char *p = str_data + 4; + unsigned char *cd = (unsigned char *)d; + + if (c == -1) + c = strlen((char *)cd); + + if (0) { + printf("%s:%d: [%d] (%d)", + str_data[3] == TELQUAL_IS ? ">>>IS" : ">>>REPLY", + str_data[3], + type, c); + printd(d, c); + printf("\r\n"); + } + *p++ = ap->type; + *p++ = ap->way; + *p++ = type; + while (c-- > 0) { + if ((*p++ = *cd++) == IAC) + *p++ = IAC; + } + *p++ = IAC; + *p++ = SE; + if (str_data[3] == TELQUAL_IS) + printsub('>', &str_data[2], p - (&str_data[2])); + return(net_write(str_data, p - str_data)); +} + + int +krb4encpwd_init(ap, server) + Authenticator *ap; + int server; +{ + char hostname[80], *cp, *realm; + C_Block skey; + + if (server) { + str_data[3] = TELQUAL_REPLY; + } else { + str_data[3] = TELQUAL_IS; + gethostname(hostname, sizeof(hostname)); + realm = krb_realmofhost(hostname); + cp = strchr(hostname, '.'); + if (*cp != NULL) *cp = NULL; + if (read_service_key(KRB_SERVICE_NAME, hostname, realm, 0, + KEYFILE, (char *)skey)) { + return(0); + } + } + return(1); +} + + int +krb4encpwd_send(ap) + Authenticator *ap; +{ + + printf("[ Trying KRB4ENCPWD ... ]\n"); + if (!UserNameRequested) { + return(0); + } + if (!auth_sendname(UserNameRequested, strlen(UserNameRequested))) { + return(0); + } + + if (!Data(ap, KRB4_ENCPWD_ACK, (void *)NULL, 0)) { + return(0); + } + + return(1); +} + + void +krb4encpwd_is(ap, data, cnt) + Authenticator *ap; + unsigned char *data; + int cnt; +{ + Session_Key skey; + Block datablock; + char r_passwd[ANAME_SZ], r_user[ANAME_SZ]; + char lhostname[ANAME_SZ], *cp; + int r; + time_t now; + + if (cnt-- < 1) + return; + switch (*data++) { + case KRB4_ENCPWD_AUTH: + memmove((void *)auth.dat, (void *)data, auth.length = cnt); + + gethostname(lhostname, sizeof(lhostname)); + if ((cp = strchr(lhostname, '.')) != 0) *cp = '\0'; + + if (r = krb_rd_encpwd_req(&auth, KRB_SERVICE_NAME, lhostname, 0, &adat, NULL, challenge, r_user, r_passwd)) { + Data(ap, KRB4_ENCPWD_REJECT, (void *)"Auth failed", -1); + auth_finished(ap, AUTH_REJECT); + return; + } + auth_encrypt_userpwd(r_passwd); + if (passwdok(UserNameRequested, UserPassword) == 0) { + /* + * illegal username and password + */ + Data(ap, KRB4_ENCPWD_REJECT, (void *)"Illegal password", -1); + auth_finished(ap, AUTH_REJECT); + return; + } + + memmove((void *)session_key, (void *)adat.session, sizeof(Block)); + Data(ap, KRB4_ENCPWD_ACCEPT, (void *)0, 0); + auth_finished(ap, AUTH_USER); + break; + + case KRB4_ENCPWD_CHALLENGE: + /* + * Take the received random challenge text and save + * for future authentication. + */ + memmove((void *)challenge, (void *)data, sizeof(Block)); + break; + + + case KRB4_ENCPWD_ACK: + /* + * Receive ack, if mutual then send random challenge + */ + + /* + * If we are doing mutual authentication, get set up to send + * the challenge, and verify it when the response comes back. + */ + + if ((ap->way & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) { + register int i; + + time(&now); + sprintf(challenge, "%x", now); + Data(ap, KRB4_ENCPWD_CHALLENGE, (void *)challenge, strlen(challenge)); + } + break; + + default: + Data(ap, KRB4_ENCPWD_REJECT, 0, 0); + break; + } +} + + + void +krb4encpwd_reply(ap, data, cnt) + Authenticator *ap; + unsigned char *data; + int cnt; +{ + Session_Key skey; + KTEXT_ST krb_token; + Block enckey; + CREDENTIALS cred; + int r; + char randchal[REALM_SZ], instance[ANAME_SZ], *cp; + char hostname[80], *realm; + + if (cnt-- < 1) + return; + switch (*data++) { + case KRB4_ENCPWD_REJECT: + if (cnt > 0) { + printf("[ KRB4_ENCPWD refuses authentication because %.*s ]\r\n", + cnt, data); + } else + printf("[ KRB4_ENCPWD refuses authentication ]\r\n"); + auth_send_retry(); + return; + case KRB4_ENCPWD_ACCEPT: + printf("[ KRB4_ENCPWD accepts you ]\n"); + auth_finished(ap, AUTH_USER); + return; + case KRB4_ENCPWD_CHALLENGE: + /* + * Verify that the response to the challenge is correct. + */ + + gethostname(hostname, sizeof(hostname)); + realm = krb_realmofhost(hostname); + memmove((void *)challenge, (void *)data, cnt); + memset(user_passwd, 0, sizeof(user_passwd)); + local_des_read_pw_string(user_passwd, sizeof(user_passwd)-1, "Password: ", 0); + UserPassword = user_passwd; + Challenge = challenge; + strcpy(instance, RemoteHostName); + if ((cp = strchr(instance, '.')) != 0) *cp = '\0'; + + if (r = krb_mk_encpwd_req(&krb_token, KRB_SERVICE_NAME, instance, realm, Challenge, UserNameRequested, user_passwd)) { + krb_token.length = 0; + } + + if (!Data(ap, KRB4_ENCPWD_AUTH, (void *)krb_token.dat, krb_token.length)) { + return; + } + + break; + + default: + return; + } +} + + int +krb4encpwd_status(ap, name, level) + Authenticator *ap; + char *name; + int level; +{ + + if (level < AUTH_USER) + return(level); + + if (UserNameRequested && passwdok(UserNameRequested, UserPassword)) { + strcpy(name, UserNameRequested); + return(AUTH_VALID); + } else { + return(AUTH_USER); + } +} + +#define BUMP(buf, len) while (*(buf)) {++(buf), --(len);} +#define ADDC(buf, len, c) if ((len) > 0) {*(buf)++ = (c); --(len);} + + void +krb4encpwd_printsub(data, cnt, buf, buflen) + unsigned char *data, *buf; + int cnt, buflen; +{ + char lbuf[32]; + register int i; + + buf[buflen-1] = '\0'; /* make sure its NULL terminated */ + buflen -= 1; + + switch(data[3]) { + case KRB4_ENCPWD_REJECT: /* Rejected (reason might follow) */ + strncpy((char *)buf, " REJECT ", buflen); + goto common; + + case KRB4_ENCPWD_ACCEPT: /* Accepted (name might follow) */ + strncpy((char *)buf, " ACCEPT ", buflen); + common: + BUMP(buf, buflen); + if (cnt <= 4) + break; + ADDC(buf, buflen, '"'); + for (i = 4; i < cnt; i++) + ADDC(buf, buflen, data[i]); + ADDC(buf, buflen, '"'); + ADDC(buf, buflen, '\0'); + break; + + case KRB4_ENCPWD_AUTH: /* Authentication data follows */ + strncpy((char *)buf, " AUTH", buflen); + goto common2; + + case KRB4_ENCPWD_CHALLENGE: + strncpy((char *)buf, " CHALLENGE", buflen); + goto common2; + + case KRB4_ENCPWD_ACK: + strncpy((char *)buf, " ACK", buflen); + goto common2; + + default: + sprintf(lbuf, " %d (unknown)", data[3]); + strncpy((char *)buf, lbuf, buflen); + common2: + BUMP(buf, buflen); + for (i = 4; i < cnt; i++) { + sprintf(lbuf, " %d", data[i]); + strncpy((char *)buf, lbuf, buflen); + BUMP(buf, buflen); + } + break; + } +} + +int passwdok(name, passwd) +char *name, *passwd; +{ + char *crypt(); + char *salt, *p; + struct passwd *pwd; + int passwdok_status = 0; + + if (pwd = getpwnam(name)) + salt = pwd->pw_passwd; + else salt = "xx"; + + p = crypt(passwd, salt); + + if (pwd && !strcmp(p, pwd->pw_passwd)) { + passwdok_status = 1; + } else passwdok_status = 0; + return(passwdok_status); +} + +#endif + +#ifdef notdef + +prkey(msg, key) + char *msg; + unsigned char *key; +{ + register int i; + printf("%s:", msg); + for (i = 0; i < 8; i++) + printf(" %3d", key[i]); + printf("\r\n"); +} +#endif diff --git a/libtelnet/misc-proto.h b/libtelnet/misc-proto.h new file mode 100644 index 0000000..e5f334a --- /dev/null +++ b/libtelnet/misc-proto.h @@ -0,0 +1,79 @@ +/*- + * Copyright (c) 1991, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)misc-proto.h 8.1 (Berkeley) 6/4/93 + */ + +/* + * Copyright (C) 1990 by the Massachusetts Institute of Technology + * + * Export of this software from the United States of America is assumed + * to require a specific license from the United States Government. + * It is the responsibility of any person or organization contemplating + * export to obtain such a license before exporting. + * + * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and + * distribute this software and its documentation for any purpose and + * without fee is hereby granted, provided that the above copyright + * notice appear in all copies and that both that copyright notice and + * this permission notice appear in supporting documentation, and that + * the name of M.I.T. not be used in advertising or publicity pertaining + * to distribution of the software without specific, written prior + * permission. M.I.T. makes no representations about the suitability of + * this software for any purpose. It is provided "as is" without express + * or implied warranty. + */ + +#ifndef __MISC_PROTO__ +#define __MISC_PROTO__ + +#if !defined(P) +#ifdef __STDC__ +#define P(x) x +#else +#define P(x) () +#endif +#endif + +void auth_encrypt_init P((char *, char *, char *, int)); +void auth_encrypt_connect P((int)); +void printd P((unsigned char *, int)); + +/* + * These functions are imported from the application + */ +int net_write P((unsigned char *, int)); +void net_encrypt P((void)); +int telnet_spin P((void)); +char *telnet_getenv P((char *)); +char *telnet_gets P((char *, char *, int, int)); +#endif diff --git a/libtelnet/misc.c b/libtelnet/misc.c new file mode 100644 index 0000000..9565900 --- /dev/null +++ b/libtelnet/misc.c @@ -0,0 +1,94 @@ +/*- + * Copyright (c) 1991, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)misc.c 8.1 (Berkeley) 6/4/93"; +#endif /* not lint */ + +#include "misc.h" + +char *RemoteHostName; +char *LocalHostName; +char *UserNameRequested = 0; +int ConnectedCount = 0; + + void +auth_encrypt_init(local, remote, name, server) + char *local; + char *remote; + char *name; + int server; +{ + RemoteHostName = remote; + LocalHostName = local; +#if defined(AUTHENTICATION) + auth_init(name, server); +#endif +#ifdef ENCRYPTION + encrypt_init(name, server); +#endif /* ENCRYPTION */ + if (UserNameRequested) { + free(UserNameRequested); + UserNameRequested = 0; + } +} + + void +auth_encrypt_user(name) + char *name; +{ + extern char *strdup(); + + if (UserNameRequested) + free(UserNameRequested); + UserNameRequested = name ? strdup(name) : 0; +} + + void +auth_encrypt_connect(cnt) + int cnt; +{ +} + + void +printd(data, cnt) + unsigned char *data; + int cnt; +{ + if (cnt > 16) + cnt = 16; + while (cnt-- > 0) { + printf(" %02x", *data); + ++data; + } +} diff --git a/libtelnet/misc.h b/libtelnet/misc.h new file mode 100644 index 0000000..41ffa7f --- /dev/null +++ b/libtelnet/misc.h @@ -0,0 +1,42 @@ +/*- + * Copyright (c) 1991, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)misc.h 8.1 (Berkeley) 6/4/93 + */ + +extern char *UserNameRequested; +extern char *LocalHostName; +extern char *RemoteHostName; +extern int ConnectedCount; +extern int ReservedPort; + +#include "misc-proto.h" diff --git a/libtelnet/read_password.c b/libtelnet/read_password.c new file mode 100644 index 0000000..4676ed3 --- /dev/null +++ b/libtelnet/read_password.c @@ -0,0 +1,145 @@ +/*- + * Copyright (c) 1992, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)read_password.c 8.3 (Berkeley) 5/30/95"; +#endif /* not lint */ + +/* + * $Source: /mit/kerberos/src/lib/des/RCS/read_password.c,v $ + * $Author: jon $ + * + * Copyright 1985, 1986, 1987, 1988 by the Massachusetts Institute + * of Technology. + * + * For copying and distribution information, please see the file + * . + * + * This routine prints the supplied string to standard + * output as a prompt, and reads a password string without + * echoing. + */ + +#if defined(RSA_ENCPWD) || defined(KRB4_ENCPWD) + +#include +#include +#include +#include +#include + +static jmp_buf env; + +/*** Routines ****************************************************** */ +/* + * This version just returns the string, doesn't map to key. + * + * Returns 0 on success, non-zero on failure. + */ + +int +local_des_read_pw_string(s,max,prompt,verify) + char *s; + int max; + char *prompt; + int verify; +{ + int ok = 0; + char *ptr; + + jmp_buf old_env; + struct sgttyb tty_state; + char key_string[BUFSIZ]; + + if (max > BUFSIZ) { + return -1; + } + + /* XXX assume jmp_buf is typedef'ed to an array */ + memmove((char *)env, (char *)old_env, sizeof(env)); + if (setjmp(env)) + goto lose; + + /* save terminal state*/ + if (ioctl(0,TIOCGETP,(char *)&tty_state) == -1) + return -1; +/* + push_signals(); +*/ + /* Turn off echo */ + tty_state.sg_flags &= ~ECHO; + if (ioctl(0,TIOCSETP,(char *)&tty_state) == -1) + return -1; + while (!ok) { + (void) printf(prompt); + (void) fflush(stdout); + while (!fgets(s, max, stdin)); + + if ((ptr = strchr(s, '\n'))) + *ptr = '\0'; + if (verify) { + printf("\nVerifying, please re-enter %s",prompt); + (void) fflush(stdout); + if (!fgets(key_string, sizeof(key_string), stdin)) { + clearerr(stdin); + continue; + } + if ((ptr = strchr(key_string, '\n'))) + *ptr = '\0'; + if (strcmp(s,key_string)) { + printf("\n\07\07Mismatch - try again\n"); + (void) fflush(stdout); + continue; + } + } + ok = 1; + } + +lose: + if (!ok) + memset(s, 0, max); + printf("\n"); + /* turn echo back on */ + tty_state.sg_flags |= ECHO; + if (ioctl(0,TIOCSETP,(char *)&tty_state)) + ok = 0; +/* + pop_signals(); +*/ + memmove((char *)old_env, (char *)env, sizeof(env)); + if (verify) + memset(key_string, 0, sizeof (key_string)); + s[max-1] = 0; /* force termination */ + return !ok; /* return nonzero if not okay */ +} +#endif /* defined(RSA_ENCPWD) || defined(KRB4_ENCPWD) */ diff --git a/libtelnet/rsaencpwd.c b/libtelnet/rsaencpwd.c new file mode 100644 index 0000000..5906d99 --- /dev/null +++ b/libtelnet/rsaencpwd.c @@ -0,0 +1,492 @@ +/*- + * Copyright (c) 1992, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)rsaencpwd.c 8.3 (Berkeley) 5/30/95"; +#endif /* not lint */ + + +#ifdef RSA_ENCPWD +/* + * COPYRIGHT (C) 1990 DIGITAL EQUIPMENT CORPORATION + * ALL RIGHTS RESERVED + * + * "Digital Equipment Corporation authorizes the reproduction, + * distribution and modification of this software subject to the following + * restrictions: + * + * 1. Any partial or whole copy of this software, or any modification + * thereof, must include this copyright notice in its entirety. + * + * 2. This software is supplied "as is" with no warranty of any kind, + * expressed or implied, for any purpose, including any warranty of fitness + * or merchantibility. DIGITAL assumes no responsibility for the use or + * reliability of this software, nor promises to provide any form of + * support for it on any basis. + * + * 3. Distribution of this software is authorized only if no profit or + * remuneration of any kind is received in exchange for such distribution. + * + * 4. This software produces public key authentication certificates + * bearing an expiration date established by DIGITAL and RSA Data + * Security, Inc. It may cease to generate certificates after the expiration + * date. Any modification of this software that changes or defeats + * the expiration date or its effect is unauthorized. + * + * 5. Software that will renew or extend the expiration date of + * authentication certificates produced by this software may be obtained + * from RSA Data Security, Inc., 10 Twin Dolphin Drive, Redwood City, CA + * 94065, (415)595-8782, or from DIGITAL" + * + */ + +#include +#include +#include +#include + +#ifdef __STDC__ +#include +#endif +#ifdef NO_STRING_H +#include +#else +#include +#endif + +#include "encrypt.h" +#include "auth.h" +#include "misc.h" +#include "cdc.h" + +extern auth_debug_mode; + +static unsigned char str_data[1024] = { IAC, SB, TELOPT_AUTHENTICATION, 0, + AUTHTYPE_RSA_ENCPWD, }; +static unsigned char str_name[1024] = { IAC, SB, TELOPT_AUTHENTICATION, + TELQUAL_NAME, }; + +#define RSA_ENCPWD_AUTH 0 /* Authentication data follows */ +#define RSA_ENCPWD_REJECT 1 /* Rejected (reason might follow) */ +#define RSA_ENCPWD_ACCEPT 2 /* Accepted */ +#define RSA_ENCPWD_CHALLENGEKEY 3 /* Challenge and public key */ + +#define NAME_SZ 40 +#define CHAL_SZ 20 +#define PWD_SZ 40 + +static KTEXT_ST auth; +static char name[NAME_SZ]; +static char user_passwd[PWD_SZ]; +static char key_file[2*NAME_SZ]; +static char lhostname[NAME_SZ]; +static char challenge[CHAL_SZ]; +static int challenge_len; + + static int +Data(ap, type, d, c) + Authenticator *ap; + int type; + void *d; + int c; +{ + unsigned char *p = str_data + 4; + unsigned char *cd = (unsigned char *)d; + + if (c == -1) + c = strlen((char *)cd); + + if (0) { + printf("%s:%d: [%d] (%d)", + str_data[3] == TELQUAL_IS ? ">>>IS" : ">>>REPLY", + str_data[3], + type, c); + printd(d, c); + printf("\r\n"); + } + *p++ = ap->type; + *p++ = ap->way; + if (type != NULL) *p++ = type; + while (c-- > 0) { + if ((*p++ = *cd++) == IAC) + *p++ = IAC; + } + *p++ = IAC; + *p++ = SE; + if (str_data[3] == TELQUAL_IS) + printsub('>', &str_data[2], p - (&str_data[2])); + return(net_write(str_data, p - str_data)); +} + + int +rsaencpwd_init(ap, server) + Authenticator *ap; + int server; +{ + char *cp; + FILE *fp; + + if (server) { + str_data[3] = TELQUAL_REPLY; + memset(key_file, 0, sizeof(key_file)); + gethostname(lhostname, sizeof(lhostname)); + if ((cp = strchr(lhostname, '.')) != 0) *cp = '\0'; + strcpy(key_file, "/etc/."); + strcat(key_file, lhostname); + strcat(key_file, "_privkey"); + if ((fp=fopen(key_file, "r"))==NULL) return(0); + fclose(fp); + } else { + str_data[3] = TELQUAL_IS; + } + return(1); +} + + int +rsaencpwd_send(ap) + Authenticator *ap; +{ + + printf("[ Trying RSAENCPWD ... ]\n"); + if (!UserNameRequested) { + return(0); + } + if (!auth_sendname(UserNameRequested, strlen(UserNameRequested))) { + return(0); + } + if (!Data(ap, NULL, (void *)NULL, 0)) { + return(0); + } + + + return(1); +} + + void +rsaencpwd_is(ap, data, cnt) + Authenticator *ap; + unsigned char *data; + int cnt; +{ + Session_Key skey; + Block datablock; + char r_passwd[PWD_SZ], r_user[NAME_SZ]; + char *cp, key[160]; + char chalkey[160], *ptr; + FILE *fp; + int r, i, j, chalkey_len, len; + time_t now; + + cnt--; + switch (*data++) { + case RSA_ENCPWD_AUTH: + memmove((void *)auth.dat, (void *)data, auth.length = cnt); + + if ((fp=fopen(key_file, "r"))==NULL) { + Data(ap, RSA_ENCPWD_REJECT, (void *)"Auth failed", -1); + auth_finished(ap, AUTH_REJECT); + return; + } + /* + * get privkey + */ + fscanf(fp, "%x;", &len); + for (i=0;iway & AUTH_HOW_MASK) == AUTH_HOW_ONE_WAY) { + register int i; + + + time(&now); + if ((now % 2) == 0) { + sprintf(challenge, "%x", now); + challenge_len = strlen(challenge); + } else { + strcpy(challenge, "randchal"); + challenge_len = 8; + } + + if ((fp=fopen(key_file, "r"))==NULL) { + Data(ap, RSA_ENCPWD_REJECT, (void *)"Auth failed", -1); + auth_finished(ap, AUTH_REJECT); + return; + } + /* + * skip privkey + */ + fscanf(fp, "%x;", &len); + for (i=0;i 0) { + printf("[ RSA_ENCPWD refuses authentication because %.*s ]\r\n", + cnt, data); + } else + printf("[ RSA_ENCPWD refuses authentication ]\r\n"); + auth_send_retry(); + return; + case RSA_ENCPWD_ACCEPT: + printf("[ RSA_ENCPWD accepts you ]\n"); + auth_finished(ap, AUTH_USER); + return; + case RSA_ENCPWD_CHALLENGEKEY: + /* + * Verify that the response to the challenge is correct. + */ + + memmove((void *)chalkey, (void *)data, cnt); + ptr = (char *) &chalkey[0]; + ptr += DecodeHeaderLength(chalkey); + if (*ptr != 0x04) { + return; + } + *ptr++; + challenge_len = DecodeValueLength(ptr); + ptr += NumEncodeLengthOctets(challenge_len); + memmove(challenge, ptr, challenge_len); + ptr += challenge_len; + if (*ptr != 0x04) { + return; + } + *ptr++; + pubkey_len = DecodeValueLength(ptr); + ptr += NumEncodeLengthOctets(pubkey_len); + memmove(pubkey, ptr, pubkey_len); + memset(user_passwd, 0, sizeof(user_passwd)); + local_des_read_pw_string(user_passwd, sizeof(user_passwd)-1, "Password: ", 0); + UserPassword = user_passwd; + Challenge = challenge; + r = init_rsa_encpwd(&token, user_passwd, challenge, challenge_len, pubkey); + if (r < 0) { + token.length = 1; + } + + if (!Data(ap, RSA_ENCPWD_AUTH, (void *)token.dat, token.length)) { + return; + } + + break; + + default: + return; + } +} + + int +rsaencpwd_status(ap, name, level) + Authenticator *ap; + char *name; + int level; +{ + + if (level < AUTH_USER) + return(level); + + if (UserNameRequested && rsaencpwd_passwdok(UserNameRequested, UserPassword)) { + strcpy(name, UserNameRequested); + return(AUTH_VALID); + } else { + return(AUTH_USER); + } +} + +#define BUMP(buf, len) while (*(buf)) {++(buf), --(len);} +#define ADDC(buf, len, c) if ((len) > 0) {*(buf)++ = (c); --(len);} + + void +rsaencpwd_printsub(data, cnt, buf, buflen) + unsigned char *data, *buf; + int cnt, buflen; +{ + char lbuf[32]; + register int i; + + buf[buflen-1] = '\0'; /* make sure its NULL terminated */ + buflen -= 1; + + switch(data[3]) { + case RSA_ENCPWD_REJECT: /* Rejected (reason might follow) */ + strncpy((char *)buf, " REJECT ", buflen); + goto common; + + case RSA_ENCPWD_ACCEPT: /* Accepted (name might follow) */ + strncpy((char *)buf, " ACCEPT ", buflen); + common: + BUMP(buf, buflen); + if (cnt <= 4) + break; + ADDC(buf, buflen, '"'); + for (i = 4; i < cnt; i++) + ADDC(buf, buflen, data[i]); + ADDC(buf, buflen, '"'); + ADDC(buf, buflen, '\0'); + break; + + case RSA_ENCPWD_AUTH: /* Authentication data follows */ + strncpy((char *)buf, " AUTH", buflen); + goto common2; + + case RSA_ENCPWD_CHALLENGEKEY: + strncpy((char *)buf, " CHALLENGEKEY", buflen); + goto common2; + + default: + sprintf(lbuf, " %d (unknown)", data[3]); + strncpy((char *)buf, lbuf, buflen); + common2: + BUMP(buf, buflen); + for (i = 4; i < cnt; i++) { + sprintf(lbuf, " %d", data[i]); + strncpy((char *)buf, lbuf, buflen); + BUMP(buf, buflen); + } + break; + } +} + +int rsaencpwd_passwdok(name, passwd) +char *name, *passwd; +{ + char *crypt(); + char *salt, *p; + struct passwd *pwd; + int passwdok_status = 0; + + if (pwd = getpwnam(name)) + salt = pwd->pw_passwd; + else salt = "xx"; + + p = crypt(passwd, salt); + + if (pwd && !strcmp(p, pwd->pw_passwd)) { + passwdok_status = 1; + } else passwdok_status = 0; + return(passwdok_status); +} + +#endif + +#ifdef notdef + +prkey(msg, key) + char *msg; + unsigned char *key; +{ + register int i; + printf("%s:", msg); + for (i = 0; i < 8; i++) + printf(" %3d", key[i]); + printf("\r\n"); +} +#endif diff --git a/libtelnet/spx.c b/libtelnet/spx.c new file mode 100644 index 0000000..86c6197 --- /dev/null +++ b/libtelnet/spx.c @@ -0,0 +1,588 @@ +/*- + * Copyright (c) 1992, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)spx.c 8.2 (Berkeley) 5/30/95"; +#endif /* not lint */ + +#ifdef SPX +/* + * COPYRIGHT (C) 1990 DIGITAL EQUIPMENT CORPORATION + * ALL RIGHTS RESERVED + * + * "Digital Equipment Corporation authorizes the reproduction, + * distribution and modification of this software subject to the following + * restrictions: + * + * 1. Any partial or whole copy of this software, or any modification + * thereof, must include this copyright notice in its entirety. + * + * 2. This software is supplied "as is" with no warranty of any kind, + * expressed or implied, for any purpose, including any warranty of fitness + * or merchantibility. DIGITAL assumes no responsibility for the use or + * reliability of this software, nor promises to provide any form of + * support for it on any basis. + * + * 3. Distribution of this software is authorized only if no profit or + * remuneration of any kind is received in exchange for such distribution. + * + * 4. This software produces public key authentication certificates + * bearing an expiration date established by DIGITAL and RSA Data + * Security, Inc. It may cease to generate certificates after the expiration + * date. Any modification of this software that changes or defeats + * the expiration date or its effect is unauthorized. + * + * 5. Software that will renew or extend the expiration date of + * authentication certificates produced by this software may be obtained + * from RSA Data Security, Inc., 10 Twin Dolphin Drive, Redwood City, CA + * 94065, (415)595-8782, or from DIGITAL" + * + */ + +#include +#include +#include +#include "gssapi_defs.h" +#ifdef __STDC__ +#include +#endif +#ifdef NO_STRING_H +#include +#else +#include +#endif + +#include +#include "encrypt.h" +#include "auth.h" +#include "misc.h" + +extern auth_debug_mode; + +static unsigned char str_data[1024] = { IAC, SB, TELOPT_AUTHENTICATION, 0, + AUTHTYPE_SPX, }; +static unsigned char str_name[1024] = { IAC, SB, TELOPT_AUTHENTICATION, + TELQUAL_NAME, }; + +#define SPX_AUTH 0 /* Authentication data follows */ +#define SPX_REJECT 1 /* Rejected (reason might follow) */ +#define SPX_ACCEPT 2 /* Accepted */ + +#ifdef ENCRYPTION +static Block session_key = { 0 }; +#endif /* ENCRYPTION */ +static Schedule sched; +static Block challenge = { 0 }; + + +/*******************************************************************/ + +gss_OID_set actual_mechs; +gss_OID actual_mech_type, output_name_type; +int major_status, status, msg_ctx = 0, new_status; +int req_flags = 0, ret_flags, lifetime_rec; +gss_cred_id_t gss_cred_handle; +gss_ctx_id_t actual_ctxhandle, context_handle; +gss_buffer_desc output_token, input_token, input_name_buffer; +gss_buffer_desc status_string; +gss_name_t desired_targname, src_name; +gss_channel_bindings input_chan_bindings; +char lhostname[GSS_C_MAX_PRINTABLE_NAME]; +char targ_printable[GSS_C_MAX_PRINTABLE_NAME]; +int to_addr=0, from_addr=0; +char *address; +gss_buffer_desc fullname_buffer; +gss_OID fullname_type; +gss_cred_id_t gss_delegated_cred_handle; + +/*******************************************************************/ + + + + static int +Data(ap, type, d, c) + Authenticator *ap; + int type; + void *d; + int c; +{ + unsigned char *p = str_data + 4; + unsigned char *cd = (unsigned char *)d; + + if (c == -1) + c = strlen((char *)cd); + + if (0) { + printf("%s:%d: [%d] (%d)", + str_data[3] == TELQUAL_IS ? ">>>IS" : ">>>REPLY", + str_data[3], + type, c); + printd(d, c); + printf("\r\n"); + } + *p++ = ap->type; + *p++ = ap->way; + *p++ = type; + while (c-- > 0) { + if ((*p++ = *cd++) == IAC) + *p++ = IAC; + } + *p++ = IAC; + *p++ = SE; + if (str_data[3] == TELQUAL_IS) + printsub('>', &str_data[2], p - (&str_data[2])); + return(net_write(str_data, p - str_data)); +} + + int +spx_init(ap, server) + Authenticator *ap; + int server; +{ + gss_cred_id_t tmp_cred_handle; + + if (server) { + str_data[3] = TELQUAL_REPLY; + gethostname(lhostname, sizeof(lhostname)); + strcpy(targ_printable, "SERVICE:rcmd@"); + strcat(targ_printable, lhostname); + input_name_buffer.length = strlen(targ_printable); + input_name_buffer.value = targ_printable; + major_status = gss_import_name(&status, + &input_name_buffer, + GSS_C_NULL_OID, + &desired_targname); + major_status = gss_acquire_cred(&status, + desired_targname, + 0, + GSS_C_NULL_OID_SET, + GSS_C_ACCEPT, + &tmp_cred_handle, + &actual_mechs, + &lifetime_rec); + if (major_status != GSS_S_COMPLETE) return(0); + } else { + str_data[3] = TELQUAL_IS; + } + return(1); +} + + int +spx_send(ap) + Authenticator *ap; +{ + Block enckey; + int r; + + gss_OID actual_mech_type, output_name_type; + int msg_ctx = 0, new_status, status; + int req_flags = 0, ret_flags, lifetime_rec, major_status; + gss_buffer_desc output_token, input_token, input_name_buffer; + gss_buffer_desc output_name_buffer, status_string; + gss_name_t desired_targname; + gss_channel_bindings input_chan_bindings; + char targ_printable[GSS_C_MAX_PRINTABLE_NAME]; + int from_addr=0, to_addr=0, myhostlen, j; + int deleg_flag=1, mutual_flag=0, replay_flag=0, seq_flag=0; + char *address; + + printf("[ Trying SPX ... ]\n"); + strcpy(targ_printable, "SERVICE:rcmd@"); + strcat(targ_printable, RemoteHostName); + + input_name_buffer.length = strlen(targ_printable); + input_name_buffer.value = targ_printable; + + if (!UserNameRequested) { + return(0); + } + + major_status = gss_import_name(&status, + &input_name_buffer, + GSS_C_NULL_OID, + &desired_targname); + + + major_status = gss_display_name(&status, + desired_targname, + &output_name_buffer, + &output_name_type); + + printf("target is '%s'\n", output_name_buffer.value); fflush(stdout); + + major_status = gss_release_buffer(&status, &output_name_buffer); + + input_chan_bindings = (gss_channel_bindings) + malloc(sizeof(gss_channel_bindings_desc)); + + input_chan_bindings->initiator_addrtype = GSS_C_AF_INET; + input_chan_bindings->initiator_address.length = 4; + address = (char *) malloc(4); + input_chan_bindings->initiator_address.value = (char *) address; + address[0] = ((from_addr & 0xff000000) >> 24); + address[1] = ((from_addr & 0xff0000) >> 16); + address[2] = ((from_addr & 0xff00) >> 8); + address[3] = (from_addr & 0xff); + input_chan_bindings->acceptor_addrtype = GSS_C_AF_INET; + input_chan_bindings->acceptor_address.length = 4; + address = (char *) malloc(4); + input_chan_bindings->acceptor_address.value = (char *) address; + address[0] = ((to_addr & 0xff000000) >> 24); + address[1] = ((to_addr & 0xff0000) >> 16); + address[2] = ((to_addr & 0xff00) >> 8); + address[3] = (to_addr & 0xff); + input_chan_bindings->application_data.length = 0; + + req_flags = 0; + if (deleg_flag) req_flags = req_flags | 1; + if (mutual_flag) req_flags = req_flags | 2; + if (replay_flag) req_flags = req_flags | 4; + if (seq_flag) req_flags = req_flags | 8; + + major_status = gss_init_sec_context(&status, /* minor status */ + GSS_C_NO_CREDENTIAL, /* cred handle */ + &actual_ctxhandle, /* ctx handle */ + desired_targname, /* target name */ + GSS_C_NULL_OID, /* mech type */ + req_flags, /* req flags */ + 0, /* time req */ + input_chan_bindings, /* chan binding */ + GSS_C_NO_BUFFER, /* input token */ + &actual_mech_type, /* actual mech */ + &output_token, /* output token */ + &ret_flags, /* ret flags */ + &lifetime_rec); /* time rec */ + + if ((major_status != GSS_S_COMPLETE) && + (major_status != GSS_S_CONTINUE_NEEDED)) { + gss_display_status(&new_status, + status, + GSS_C_MECH_CODE, + GSS_C_NULL_OID, + &msg_ctx, + &status_string); + printf("%s\n", status_string.value); + return(0); + } + + if (!auth_sendname(UserNameRequested, strlen(UserNameRequested))) { + return(0); + } + + if (!Data(ap, SPX_AUTH, (void *)output_token.value, output_token.length)) { + return(0); + } + + return(1); +} + + void +spx_is(ap, data, cnt) + Authenticator *ap; + unsigned char *data; + int cnt; +{ + Session_Key skey; + Block datablock; + int r; + + if (cnt-- < 1) + return; + switch (*data++) { + case SPX_AUTH: + input_token.length = cnt; + input_token.value = (char *) data; + + gethostname(lhostname, sizeof(lhostname)); + + strcpy(targ_printable, "SERVICE:rcmd@"); + strcat(targ_printable, lhostname); + + input_name_buffer.length = strlen(targ_printable); + input_name_buffer.value = targ_printable; + + major_status = gss_import_name(&status, + &input_name_buffer, + GSS_C_NULL_OID, + &desired_targname); + + major_status = gss_acquire_cred(&status, + desired_targname, + 0, + GSS_C_NULL_OID_SET, + GSS_C_ACCEPT, + &gss_cred_handle, + &actual_mechs, + &lifetime_rec); + + major_status = gss_release_name(&status, desired_targname); + + input_chan_bindings = (gss_channel_bindings) + malloc(sizeof(gss_channel_bindings_desc)); + + input_chan_bindings->initiator_addrtype = GSS_C_AF_INET; + input_chan_bindings->initiator_address.length = 4; + address = (char *) malloc(4); + input_chan_bindings->initiator_address.value = (char *) address; + address[0] = ((from_addr & 0xff000000) >> 24); + address[1] = ((from_addr & 0xff0000) >> 16); + address[2] = ((from_addr & 0xff00) >> 8); + address[3] = (from_addr & 0xff); + input_chan_bindings->acceptor_addrtype = GSS_C_AF_INET; + input_chan_bindings->acceptor_address.length = 4; + address = (char *) malloc(4); + input_chan_bindings->acceptor_address.value = (char *) address; + address[0] = ((to_addr & 0xff000000) >> 24); + address[1] = ((to_addr & 0xff0000) >> 16); + address[2] = ((to_addr & 0xff00) >> 8); + address[3] = (to_addr & 0xff); + input_chan_bindings->application_data.length = 0; + + major_status = gss_accept_sec_context(&status, + &context_handle, + gss_cred_handle, + &input_token, + input_chan_bindings, + &src_name, + &actual_mech_type, + &output_token, + &ret_flags, + &lifetime_rec, + &gss_delegated_cred_handle); + + + if (major_status != GSS_S_COMPLETE) { + + major_status = gss_display_name(&status, + src_name, + &fullname_buffer, + &fullname_type); + Data(ap, SPX_REJECT, (void *)"auth failed", -1); + auth_finished(ap, AUTH_REJECT); + return; + } + + major_status = gss_display_name(&status, + src_name, + &fullname_buffer, + &fullname_type); + + + Data(ap, SPX_ACCEPT, (void *)output_token.value, output_token.length); + auth_finished(ap, AUTH_USER); + break; + + default: + Data(ap, SPX_REJECT, 0, 0); + break; + } +} + + + void +spx_reply(ap, data, cnt) + Authenticator *ap; + unsigned char *data; + int cnt; +{ + Session_Key skey; + + if (cnt-- < 1) + return; + switch (*data++) { + case SPX_REJECT: + if (cnt > 0) { + printf("[ SPX refuses authentication because %.*s ]\r\n", + cnt, data); + } else + printf("[ SPX refuses authentication ]\r\n"); + auth_send_retry(); + return; + case SPX_ACCEPT: + printf("[ SPX accepts you ]\n"); + if ((ap->way & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) { + /* + * Send over the encrypted challenge. + */ + input_token.value = (char *) data; + input_token.length = cnt; + + major_status = gss_init_sec_context(&status, /* minor stat */ + GSS_C_NO_CREDENTIAL, /* cred handle */ + &actual_ctxhandle, /* ctx handle */ + desired_targname, /* target name */ + GSS_C_NULL_OID, /* mech type */ + req_flags, /* req flags */ + 0, /* time req */ + input_chan_bindings, /* chan binding */ + &input_token, /* input token */ + &actual_mech_type, /* actual mech */ + &output_token, /* output token */ + &ret_flags, /* ret flags */ + &lifetime_rec); /* time rec */ + + if (major_status != GSS_S_COMPLETE) { + gss_display_status(&new_status, + status, + GSS_C_MECH_CODE, + GSS_C_NULL_OID, + &msg_ctx, + &status_string); + printf("[ SPX mutual response fails ... '%s' ]\r\n", + status_string.value); + auth_send_retry(); + return; + } + } + auth_finished(ap, AUTH_USER); + return; + + default: + return; + } +} + + int +spx_status(ap, name, level) + Authenticator *ap; + char *name; + int level; +{ + + gss_buffer_desc fullname_buffer, acl_file_buffer; + gss_OID fullname_type; + char acl_file[160], fullname[160]; + int major_status, status = 0; + struct passwd *pwd; + + /* + * hard code fullname to + * "SPX:/C=US/O=Digital/OU=LKG/OU=Sphinx/OU=Users/CN=Kannan Alagappan" + * and acl_file to "~kannan/.sphinx" + */ + + pwd = getpwnam(UserNameRequested); + if (pwd == NULL) { + return(AUTH_USER); /* not authenticated */ + } + + strcpy(acl_file, pwd->pw_dir); + strcat(acl_file, "/.sphinx"); + acl_file_buffer.value = acl_file; + acl_file_buffer.length = strlen(acl_file); + + major_status = gss_display_name(&status, + src_name, + &fullname_buffer, + &fullname_type); + + if (level < AUTH_USER) + return(level); + + major_status = gss__check_acl(&status, &fullname_buffer, + &acl_file_buffer); + + if (major_status == GSS_S_COMPLETE) { + strcpy(name, UserNameRequested); + return(AUTH_VALID); + } else { + return(AUTH_USER); + } + +} + +#define BUMP(buf, len) while (*(buf)) {++(buf), --(len);} +#define ADDC(buf, len, c) if ((len) > 0) {*(buf)++ = (c); --(len);} + + void +spx_printsub(data, cnt, buf, buflen) + unsigned char *data, *buf; + int cnt, buflen; +{ + char lbuf[32]; + register int i; + + buf[buflen-1] = '\0'; /* make sure its NULL terminated */ + buflen -= 1; + + switch(data[3]) { + case SPX_REJECT: /* Rejected (reason might follow) */ + strncpy((char *)buf, " REJECT ", buflen); + goto common; + + case SPX_ACCEPT: /* Accepted (name might follow) */ + strncpy((char *)buf, " ACCEPT ", buflen); + common: + BUMP(buf, buflen); + if (cnt <= 4) + break; + ADDC(buf, buflen, '"'); + for (i = 4; i < cnt; i++) + ADDC(buf, buflen, data[i]); + ADDC(buf, buflen, '"'); + ADDC(buf, buflen, '\0'); + break; + + case SPX_AUTH: /* Authentication data follows */ + strncpy((char *)buf, " AUTH", buflen); + goto common2; + + default: + sprintf(lbuf, " %d (unknown)", data[3]); + strncpy((char *)buf, lbuf, buflen); + common2: + BUMP(buf, buflen); + for (i = 4; i < cnt; i++) { + sprintf(lbuf, " %d", data[i]); + strncpy((char *)buf, lbuf, buflen); + BUMP(buf, buflen); + } + break; + } +} + +#endif + +#ifdef notdef + +prkey(msg, key) + char *msg; + unsigned char *key; +{ + register int i; + printf("%s:", msg); + for (i = 0; i < 8; i++) + printf(" %3d", key[i]); + printf("\r\n"); +} +#endif diff --git a/telnet/authenc.c b/telnet/authenc.c new file mode 100644 index 0000000..545df78 --- /dev/null +++ b/telnet/authenc.c @@ -0,0 +1,111 @@ +/*- + * Copyright (c) 1991, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)authenc.c 8.1 (Berkeley) 6/6/93"; +#endif /* not lint */ + +#if defined(AUTHENTICATION) || defined(ENCRYPTION) +#include +#include +#include +#include + +#include "general.h" +#include "ring.h" +#include "externs.h" +#include "defines.h" +#include "types.h" + + int +net_write(str, len) + unsigned char *str; + int len; +{ + if (NETROOM() > len) { + ring_supply_data(&netoring, str, len); + if (str[0] == IAC && str[1] == SE) + printsub('>', &str[2], len-2); + return(len); + } + return(0); +} + + void +net_encrypt() +{ +#ifdef ENCRYPTION + if (encrypt_output) + ring_encrypt(&netoring, encrypt_output); + else + ring_clearto(&netoring); +#endif /* ENCRYPTION */ +} + + int +telnet_spin() +{ + return(-1); +} + + char * +telnet_getenv(val) + char *val; +{ + return((char *)env_getvalue((unsigned char *)val)); +} + + char * +telnet_gets(prompt, result, length, echo) + char *prompt; + char *result; + int length; + int echo; +{ + extern char *getpass(); + extern int globalmode; + int om = globalmode; + char *res; + + TerminalNewMode(-1); + if (echo) { + printf("%s", prompt); + res = fgets(result, length, stdin); + } else if (res = getpass(prompt)) { + strncpy(result, res, length); + res = result; + } + TerminalNewMode(om); + return(res); +} +#endif /* defined(AUTHENTICATION) || defined(ENCRYPTION) */ diff --git a/telnet/commands.c b/telnet/commands.c new file mode 100644 index 0000000..41ef5cd --- /dev/null +++ b/telnet/commands.c @@ -0,0 +1,2945 @@ +/* + * Copyright (c) 1988, 1990, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)commands.c 8.4 (Berkeley) 5/30/95"; +#endif /* not lint */ + +#if defined(unix) +#include +#if defined(CRAY) || defined(sysV88) +#include +#endif +#include +#else +#include +#endif /* defined(unix) */ +#include +#include +#ifdef CRAY +#include +#endif /* CRAY */ + +#include +#include +#include +#include +#include +#include + +#include + +#include "general.h" + +#include "ring.h" + +#include "externs.h" +#include "defines.h" +#include "types.h" + +#if !defined(CRAY) && !defined(sysV88) +#include +# if (defined(vax) || defined(tahoe) || defined(hp300)) && !defined(ultrix) +# include +# endif /* vax */ +#endif /* !defined(CRAY) && !defined(sysV88) */ +#include + + +#ifndef MAXHOSTNAMELEN +#define MAXHOSTNAMELEN 64 +#endif MAXHOSTNAMELEN + +#if defined(IPPROTO_IP) && defined(IP_TOS) +int tos = -1; +#endif /* defined(IPPROTO_IP) && defined(IP_TOS) */ + +char *hostname; +static char _hostname[MAXHOSTNAMELEN]; + +extern char *getenv(); + +extern int isprefix(); +extern char **genget(); +extern int Ambiguous(); + +static call(); + +typedef struct { + char *name; /* command name */ + char *help; /* help string (NULL for no help) */ + int (*handler)(); /* routine which executes command */ + int needconnect; /* Do we need to be connected to execute? */ +} Command; + +static char line[256]; +static char saveline[256]; +static int margc; +static char *margv[20]; + + static void +makeargv() +{ + register char *cp, *cp2, c; + register char **argp = margv; + + margc = 0; + cp = line; + if (*cp == '!') { /* Special case shell escape */ + strcpy(saveline, line); /* save for shell command */ + *argp++ = "!"; /* No room in string to get this */ + margc++; + cp++; + } + while (c = *cp) { + register int inquote = 0; + while (isspace(c)) + c = *++cp; + if (c == '\0') + break; + *argp++ = cp; + margc += 1; + for (cp2 = cp; c != '\0'; c = *++cp) { + if (inquote) { + if (c == inquote) { + inquote = 0; + continue; + } + } else { + if (c == '\\') { + if ((c = *++cp) == '\0') + break; + } else if (c == '"') { + inquote = '"'; + continue; + } else if (c == '\'') { + inquote = '\''; + continue; + } else if (isspace(c)) + break; + } + *cp2++ = c; + } + *cp2 = '\0'; + if (c == '\0') + break; + cp++; + } + *argp++ = 0; +} + +/* + * Make a character string into a number. + * + * Todo: 1. Could take random integers (12, 0x12, 012, 0b1). + */ + + static +special(s) + register char *s; +{ + register char c; + char b; + + switch (*s) { + case '^': + b = *++s; + if (b == '?') { + c = b | 0x40; /* DEL */ + } else { + c = b & 0x1f; + } + break; + default: + c = *s; + break; + } + return c; +} + +/* + * Construct a control character sequence + * for a special character. + */ + static char * +control(c) + register cc_t c; +{ + static char buf[5]; + /* + * The only way I could get the Sun 3.5 compiler + * to shut up about + * if ((unsigned int)c >= 0x80) + * was to assign "c" to an unsigned int variable... + * Arggg.... + */ + register unsigned int uic = (unsigned int)c; + + if (uic == 0x7f) + return ("^?"); + if (c == (cc_t)_POSIX_VDISABLE) { + return "off"; + } + if (uic >= 0x80) { + buf[0] = '\\'; + buf[1] = ((c>>6)&07) + '0'; + buf[2] = ((c>>3)&07) + '0'; + buf[3] = (c&07) + '0'; + buf[4] = 0; + } else if (uic >= 0x20) { + buf[0] = c; + buf[1] = 0; + } else { + buf[0] = '^'; + buf[1] = '@'+c; + buf[2] = 0; + } + return (buf); +} + + + +/* + * The following are data structures and routines for + * the "send" command. + * + */ + +struct sendlist { + char *name; /* How user refers to it (case independent) */ + char *help; /* Help information (0 ==> no help) */ + int needconnect; /* Need to be connected */ + int narg; /* Number of arguments */ + int (*handler)(); /* Routine to perform (for special ops) */ + int nbyte; /* Number of bytes to send this command */ + int what; /* Character to be sent (<0 ==> special) */ +}; + + +static int + send_esc P((void)), + send_help P((void)), + send_docmd P((char *)), + send_dontcmd P((char *)), + send_willcmd P((char *)), + send_wontcmd P((char *)); + +static struct sendlist Sendlist[] = { + { "ao", "Send Telnet Abort output", 1, 0, 0, 2, AO }, + { "ayt", "Send Telnet 'Are You There'", 1, 0, 0, 2, AYT }, + { "brk", "Send Telnet Break", 1, 0, 0, 2, BREAK }, + { "break", 0, 1, 0, 0, 2, BREAK }, + { "ec", "Send Telnet Erase Character", 1, 0, 0, 2, EC }, + { "el", "Send Telnet Erase Line", 1, 0, 0, 2, EL }, + { "escape", "Send current escape character", 1, 0, send_esc, 1, 0 }, + { "ga", "Send Telnet 'Go Ahead' sequence", 1, 0, 0, 2, GA }, + { "ip", "Send Telnet Interrupt Process", 1, 0, 0, 2, IP }, + { "intp", 0, 1, 0, 0, 2, IP }, + { "interrupt", 0, 1, 0, 0, 2, IP }, + { "intr", 0, 1, 0, 0, 2, IP }, + { "nop", "Send Telnet 'No operation'", 1, 0, 0, 2, NOP }, + { "eor", "Send Telnet 'End of Record'", 1, 0, 0, 2, EOR }, + { "abort", "Send Telnet 'Abort Process'", 1, 0, 0, 2, ABORT }, + { "susp", "Send Telnet 'Suspend Process'", 1, 0, 0, 2, SUSP }, + { "eof", "Send Telnet End of File Character", 1, 0, 0, 2, xEOF }, + { "synch", "Perform Telnet 'Synch operation'", 1, 0, dosynch, 2, 0 }, + { "getstatus", "Send request for STATUS", 1, 0, get_status, 6, 0 }, + { "?", "Display send options", 0, 0, send_help, 0, 0 }, + { "help", 0, 0, 0, send_help, 0, 0 }, + { "do", 0, 0, 1, send_docmd, 3, 0 }, + { "dont", 0, 0, 1, send_dontcmd, 3, 0 }, + { "will", 0, 0, 1, send_willcmd, 3, 0 }, + { "wont", 0, 0, 1, send_wontcmd, 3, 0 }, + { 0 } +}; + +#define GETSEND(name) ((struct sendlist *) genget(name, (char **) Sendlist, \ + sizeof(struct sendlist))) + + static int +sendcmd(argc, argv) + int argc; + char **argv; +{ + int count; /* how many bytes we are going to need to send */ + int i; + int question = 0; /* was at least one argument a question */ + struct sendlist *s; /* pointer to current command */ + int success = 0; + int needconnect = 0; + + if (argc < 2) { + printf("need at least one argument for 'send' command\n"); + printf("'send ?' for help\n"); + return 0; + } + /* + * First, validate all the send arguments. + * In addition, we see how much space we are going to need, and + * whether or not we will be doing a "SYNCH" operation (which + * flushes the network queue). + */ + count = 0; + for (i = 1; i < argc; i++) { + s = GETSEND(argv[i]); + if (s == 0) { + printf("Unknown send argument '%s'\n'send ?' for help.\n", + argv[i]); + return 0; + } else if (Ambiguous(s)) { + printf("Ambiguous send argument '%s'\n'send ?' for help.\n", + argv[i]); + return 0; + } + if (i + s->narg >= argc) { + fprintf(stderr, + "Need %d argument%s to 'send %s' command. 'send %s ?' for help.\n", + s->narg, s->narg == 1 ? "" : "s", s->name, s->name); + return 0; + } + count += s->nbyte; + if (s->handler == send_help) { + send_help(); + return 0; + } + + i += s->narg; + needconnect += s->needconnect; + } + if (!connected && needconnect) { + printf("?Need to be connected first.\n"); + printf("'send ?' for help\n"); + return 0; + } + /* Now, do we have enough room? */ + if (NETROOM() < count) { + printf("There is not enough room in the buffer TO the network\n"); + printf("to process your request. Nothing will be done.\n"); + printf("('send synch' will throw away most data in the network\n"); + printf("buffer, if this might help.)\n"); + return 0; + } + /* OK, they are all OK, now go through again and actually send */ + count = 0; + for (i = 1; i < argc; i++) { + if ((s = GETSEND(argv[i])) == 0) { + fprintf(stderr, "Telnet 'send' error - argument disappeared!\n"); + (void) quit(); + /*NOTREACHED*/ + } + if (s->handler) { + count++; + success += (*s->handler)((s->narg > 0) ? argv[i+1] : 0, + (s->narg > 1) ? argv[i+2] : 0); + i += s->narg; + } else { + NET2ADD(IAC, s->what); + printoption("SENT", IAC, s->what); + } + } + return (count == success); +} + + static int +send_esc() +{ + NETADD(escape); + return 1; +} + + static int +send_docmd(name) + char *name; +{ + return(send_tncmd(send_do, "do", name)); +} + + static int +send_dontcmd(name) + char *name; +{ + return(send_tncmd(send_dont, "dont", name)); +} + static int +send_willcmd(name) + char *name; +{ + return(send_tncmd(send_will, "will", name)); +} + static int +send_wontcmd(name) + char *name; +{ + return(send_tncmd(send_wont, "wont", name)); +} + + int +send_tncmd(func, cmd, name) + void (*func)(); + char *cmd, *name; +{ + char **cpp; + extern char *telopts[]; + register int val = 0; + + if (isprefix(name, "help") || isprefix(name, "?")) { + register int col, len; + + printf("Usage: send %s \n", cmd); + printf("\"value\" must be from 0 to 255\n"); + printf("Valid options are:\n\t"); + + col = 8; + for (cpp = telopts; *cpp; cpp++) { + len = strlen(*cpp) + 3; + if (col + len > 65) { + printf("\n\t"); + col = 8; + } + printf(" \"%s\"", *cpp); + col += len; + } + printf("\n"); + return 0; + } + cpp = (char **)genget(name, telopts, sizeof(char *)); + if (Ambiguous(cpp)) { + fprintf(stderr,"'%s': ambiguous argument ('send %s ?' for help).\n", + name, cmd); + return 0; + } + if (cpp) { + val = cpp - telopts; + } else { + register char *cp = name; + + while (*cp >= '0' && *cp <= '9') { + val *= 10; + val += *cp - '0'; + cp++; + } + if (*cp != 0) { + fprintf(stderr, "'%s': unknown argument ('send %s ?' for help).\n", + name, cmd); + return 0; + } else if (val < 0 || val > 255) { + fprintf(stderr, "'%s': bad value ('send %s ?' for help).\n", + name, cmd); + return 0; + } + } + if (!connected) { + printf("?Need to be connected first.\n"); + return 0; + } + (*func)(val, 1); + return 1; +} + + static int +send_help() +{ + struct sendlist *s; /* pointer to current command */ + for (s = Sendlist; s->name; s++) { + if (s->help) + printf("%-15s %s\n", s->name, s->help); + } + return(0); +} + +/* + * The following are the routines and data structures referred + * to by the arguments to the "toggle" command. + */ + + static int +lclchars() +{ + donelclchars = 1; + return 1; +} + + static int +togdebug() +{ +#ifndef NOT43 + if (net > 0 && + (SetSockOpt(net, SOL_SOCKET, SO_DEBUG, debug)) < 0) { + perror("setsockopt (SO_DEBUG)"); + } +#else /* NOT43 */ + if (debug) { + if (net > 0 && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 0, 0) < 0) + perror("setsockopt (SO_DEBUG)"); + } else + printf("Cannot turn off socket debugging\n"); +#endif /* NOT43 */ + return 1; +} + + + static int +togcrlf() +{ + if (crlf) { + printf("Will send carriage returns as telnet .\n"); + } else { + printf("Will send carriage returns as telnet .\n"); + } + return 1; +} + +int binmode; + + static int +togbinary(val) + int val; +{ + donebinarytoggle = 1; + + if (val >= 0) { + binmode = val; + } else { + if (my_want_state_is_will(TELOPT_BINARY) && + my_want_state_is_do(TELOPT_BINARY)) { + binmode = 1; + } else if (my_want_state_is_wont(TELOPT_BINARY) && + my_want_state_is_dont(TELOPT_BINARY)) { + binmode = 0; + } + val = binmode ? 0 : 1; + } + + if (val == 1) { + if (my_want_state_is_will(TELOPT_BINARY) && + my_want_state_is_do(TELOPT_BINARY)) { + printf("Already operating in binary mode with remote host.\n"); + } else { + printf("Negotiating binary mode with remote host.\n"); + tel_enter_binary(3); + } + } else { + if (my_want_state_is_wont(TELOPT_BINARY) && + my_want_state_is_dont(TELOPT_BINARY)) { + printf("Already in network ascii mode with remote host.\n"); + } else { + printf("Negotiating network ascii mode with remote host.\n"); + tel_leave_binary(3); + } + } + return 1; +} + + static int +togrbinary(val) + int val; +{ + donebinarytoggle = 1; + + if (val == -1) + val = my_want_state_is_do(TELOPT_BINARY) ? 0 : 1; + + if (val == 1) { + if (my_want_state_is_do(TELOPT_BINARY)) { + printf("Already receiving in binary mode.\n"); + } else { + printf("Negotiating binary mode on input.\n"); + tel_enter_binary(1); + } + } else { + if (my_want_state_is_dont(TELOPT_BINARY)) { + printf("Already receiving in network ascii mode.\n"); + } else { + printf("Negotiating network ascii mode on input.\n"); + tel_leave_binary(1); + } + } + return 1; +} + + static int +togxbinary(val) + int val; +{ + donebinarytoggle = 1; + + if (val == -1) + val = my_want_state_is_will(TELOPT_BINARY) ? 0 : 1; + + if (val == 1) { + if (my_want_state_is_will(TELOPT_BINARY)) { + printf("Already transmitting in binary mode.\n"); + } else { + printf("Negotiating binary mode on output.\n"); + tel_enter_binary(2); + } + } else { + if (my_want_state_is_wont(TELOPT_BINARY)) { + printf("Already transmitting in network ascii mode.\n"); + } else { + printf("Negotiating network ascii mode on output.\n"); + tel_leave_binary(2); + } + } + return 1; +} + + +static int togglehelp P((void)); +#if defined(AUTHENTICATION) +extern int auth_togdebug P((int)); +#endif +#ifdef ENCRYPTION +extern int EncryptAutoEnc P((int)); +extern int EncryptAutoDec P((int)); +extern int EncryptDebug P((int)); +extern int EncryptVerbose P((int)); +#endif /* ENCRYPTION */ + +struct togglelist { + char *name; /* name of toggle */ + char *help; /* help message */ + int (*handler)(); /* routine to do actual setting */ + int *variable; + char *actionexplanation; +}; + +static struct togglelist Togglelist[] = { + { "autoflush", + "flushing of output when sending interrupt characters", + 0, + &autoflush, + "flush output when sending interrupt characters" }, + { "autosynch", + "automatic sending of interrupt characters in urgent mode", + 0, + &autosynch, + "send interrupt characters in urgent mode" }, +#if defined(AUTHENTICATION) + { "autologin", + "automatic sending of login and/or authentication info", + 0, + &autologin, + "send login name and/or authentication information" }, + { "authdebug", + "Toggle authentication debugging", + auth_togdebug, + 0, + "print authentication debugging information" }, +#endif +#ifdef ENCRYPTION + { "autoencrypt", + "automatic encryption of data stream", + EncryptAutoEnc, + 0, + "automatically encrypt output" }, + { "autodecrypt", + "automatic decryption of data stream", + EncryptAutoDec, + 0, + "automatically decrypt input" }, + { "verbose_encrypt", + "Toggle verbose encryption output", + EncryptVerbose, + 0, + "print verbose encryption output" }, + { "encdebug", + "Toggle encryption debugging", + EncryptDebug, + 0, + "print encryption debugging information" }, +#endif /* ENCRYPTION */ + { "skiprc", + "don't read ~/.telnetrc file", + 0, + &skiprc, + "skip reading of ~/.telnetrc file" }, + { "binary", + "sending and receiving of binary data", + togbinary, + 0, + 0 }, + { "inbinary", + "receiving of binary data", + togrbinary, + 0, + 0 }, + { "outbinary", + "sending of binary data", + togxbinary, + 0, + 0 }, + { "crlf", + "sending carriage returns as telnet ", + togcrlf, + &crlf, + 0 }, + { "crmod", + "mapping of received carriage returns", + 0, + &crmod, + "map carriage return on output" }, + { "localchars", + "local recognition of certain control characters", + lclchars, + &localchars, + "recognize certain control characters" }, + { " ", "", 0 }, /* empty line */ +#if defined(unix) && defined(TN3270) + { "apitrace", + "(debugging) toggle tracing of API transactions", + 0, + &apitrace, + "trace API transactions" }, + { "cursesdata", + "(debugging) toggle printing of hexadecimal curses data", + 0, + &cursesdata, + "print hexadecimal representation of curses data" }, +#endif /* defined(unix) && defined(TN3270) */ + { "debug", + "debugging", + togdebug, + &debug, + "turn on socket level debugging" }, + { "netdata", + "printing of hexadecimal network data (debugging)", + 0, + &netdata, + "print hexadecimal representation of network traffic" }, + { "prettydump", + "output of \"netdata\" to user readable format (debugging)", + 0, + &prettydump, + "print user readable output for \"netdata\"" }, + { "options", + "viewing of options processing (debugging)", + 0, + &showoptions, + "show option processing" }, +#if defined(unix) + { "termdata", + "(debugging) toggle printing of hexadecimal terminal data", + 0, + &termdata, + "print hexadecimal representation of terminal traffic" }, +#endif /* defined(unix) */ + { "?", + 0, + togglehelp }, + { "help", + 0, + togglehelp }, + { 0 } +}; + + static int +togglehelp() +{ + struct togglelist *c; + + for (c = Togglelist; c->name; c++) { + if (c->help) { + if (*c->help) + printf("%-15s toggle %s\n", c->name, c->help); + else + printf("\n"); + } + } + printf("\n"); + printf("%-15s %s\n", "?", "display help information"); + return 0; +} + + static void +settogglehelp(set) + int set; +{ + struct togglelist *c; + + for (c = Togglelist; c->name; c++) { + if (c->help) { + if (*c->help) + printf("%-15s %s %s\n", c->name, set ? "enable" : "disable", + c->help); + else + printf("\n"); + } + } +} + +#define GETTOGGLE(name) (struct togglelist *) \ + genget(name, (char **) Togglelist, sizeof(struct togglelist)) + + static int +toggle(argc, argv) + int argc; + char *argv[]; +{ + int retval = 1; + char *name; + struct togglelist *c; + + if (argc < 2) { + fprintf(stderr, + "Need an argument to 'toggle' command. 'toggle ?' for help.\n"); + return 0; + } + argc--; + argv++; + while (argc--) { + name = *argv++; + c = GETTOGGLE(name); + if (Ambiguous(c)) { + fprintf(stderr, "'%s': ambiguous argument ('toggle ?' for help).\n", + name); + return 0; + } else if (c == 0) { + fprintf(stderr, "'%s': unknown argument ('toggle ?' for help).\n", + name); + return 0; + } else { + if (c->variable) { + *c->variable = !*c->variable; /* invert it */ + if (c->actionexplanation) { + printf("%s %s.\n", *c->variable? "Will" : "Won't", + c->actionexplanation); + } + } + if (c->handler) { + retval &= (*c->handler)(-1); + } + } + } + return retval; +} + +/* + * The following perform the "set" command. + */ + +#ifdef USE_TERMIO +struct termio new_tc = { 0 }; +#endif + +struct setlist { + char *name; /* name */ + char *help; /* help information */ + void (*handler)(); + cc_t *charp; /* where it is located at */ +}; + +static struct setlist Setlist[] = { +#ifdef KLUDGELINEMODE + { "echo", "character to toggle local echoing on/off", 0, &echoc }, +#endif + { "escape", "character to escape back to telnet command mode", 0, &escape }, + { "rlogin", "rlogin escape character", 0, &rlogin }, + { "tracefile", "file to write trace information to", SetNetTrace, (cc_t *)NetTraceFile}, + { " ", "" }, + { " ", "The following need 'localchars' to be toggled true", 0, 0 }, + { "flushoutput", "character to cause an Abort Output", 0, termFlushCharp }, + { "interrupt", "character to cause an Interrupt Process", 0, termIntCharp }, + { "quit", "character to cause an Abort process", 0, termQuitCharp }, + { "eof", "character to cause an EOF ", 0, termEofCharp }, + { " ", "" }, + { " ", "The following are for local editing in linemode", 0, 0 }, + { "erase", "character to use to erase a character", 0, termEraseCharp }, + { "kill", "character to use to erase a line", 0, termKillCharp }, + { "lnext", "character to use for literal next", 0, termLiteralNextCharp }, + { "susp", "character to cause a Suspend Process", 0, termSuspCharp }, + { "reprint", "character to use for line reprint", 0, termRprntCharp }, + { "worderase", "character to use to erase a word", 0, termWerasCharp }, + { "start", "character to use for XON", 0, termStartCharp }, + { "stop", "character to use for XOFF", 0, termStopCharp }, + { "forw1", "alternate end of line character", 0, termForw1Charp }, + { "forw2", "alternate end of line character", 0, termForw2Charp }, + { "ayt", "alternate AYT character", 0, termAytCharp }, + { 0 } +}; + +#if defined(CRAY) && !defined(__STDC__) +/* Work around compiler bug in pcc 4.1.5 */ + void +_setlist_init() +{ +#ifndef KLUDGELINEMODE +#define N 5 +#else +#define N 6 +#endif + Setlist[N+0].charp = &termFlushChar; + Setlist[N+1].charp = &termIntChar; + Setlist[N+2].charp = &termQuitChar; + Setlist[N+3].charp = &termEofChar; + Setlist[N+6].charp = &termEraseChar; + Setlist[N+7].charp = &termKillChar; + Setlist[N+8].charp = &termLiteralNextChar; + Setlist[N+9].charp = &termSuspChar; + Setlist[N+10].charp = &termRprntChar; + Setlist[N+11].charp = &termWerasChar; + Setlist[N+12].charp = &termStartChar; + Setlist[N+13].charp = &termStopChar; + Setlist[N+14].charp = &termForw1Char; + Setlist[N+15].charp = &termForw2Char; + Setlist[N+16].charp = &termAytChar; +#undef N +} +#endif /* defined(CRAY) && !defined(__STDC__) */ + + static struct setlist * +getset(name) + char *name; +{ + return (struct setlist *) + genget(name, (char **) Setlist, sizeof(struct setlist)); +} + + void +set_escape_char(s) + char *s; +{ + if (rlogin != _POSIX_VDISABLE) { + rlogin = (s && *s) ? special(s) : _POSIX_VDISABLE; + printf("Telnet rlogin escape character is '%s'.\n", + control(rlogin)); + } else { + escape = (s && *s) ? special(s) : _POSIX_VDISABLE; + printf("Telnet escape character is '%s'.\n", control(escape)); + } +} + + static int +setcmd(argc, argv) + int argc; + char *argv[]; +{ + int value; + struct setlist *ct; + struct togglelist *c; + + if (argc < 2 || argc > 3) { + printf("Format is 'set Name Value'\n'set ?' for help.\n"); + return 0; + } + if ((argc == 2) && (isprefix(argv[1], "?") || isprefix(argv[1], "help"))) { + for (ct = Setlist; ct->name; ct++) + printf("%-15s %s\n", ct->name, ct->help); + printf("\n"); + settogglehelp(1); + printf("%-15s %s\n", "?", "display help information"); + return 0; + } + + ct = getset(argv[1]); + if (ct == 0) { + c = GETTOGGLE(argv[1]); + if (c == 0) { + fprintf(stderr, "'%s': unknown argument ('set ?' for help).\n", + argv[1]); + return 0; + } else if (Ambiguous(c)) { + fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n", + argv[1]); + return 0; + } + if (c->variable) { + if ((argc == 2) || (strcmp("on", argv[2]) == 0)) + *c->variable = 1; + else if (strcmp("off", argv[2]) == 0) + *c->variable = 0; + else { + printf("Format is 'set togglename [on|off]'\n'set ?' for help.\n"); + return 0; + } + if (c->actionexplanation) { + printf("%s %s.\n", *c->variable? "Will" : "Won't", + c->actionexplanation); + } + } + if (c->handler) + (*c->handler)(1); + } else if (argc != 3) { + printf("Format is 'set Name Value'\n'set ?' for help.\n"); + return 0; + } else if (Ambiguous(ct)) { + fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n", + argv[1]); + return 0; + } else if (ct->handler) { + (*ct->handler)(argv[2]); + printf("%s set to \"%s\".\n", ct->name, (char *)ct->charp); + } else { + if (strcmp("off", argv[2])) { + value = special(argv[2]); + } else { + value = _POSIX_VDISABLE; + } + *(ct->charp) = (cc_t)value; + printf("%s character is '%s'.\n", ct->name, control(*(ct->charp))); + } + slc_check(); + return 1; +} + + static int +unsetcmd(argc, argv) + int argc; + char *argv[]; +{ + struct setlist *ct; + struct togglelist *c; + register char *name; + + if (argc < 2) { + fprintf(stderr, + "Need an argument to 'unset' command. 'unset ?' for help.\n"); + return 0; + } + if (isprefix(argv[1], "?") || isprefix(argv[1], "help")) { + for (ct = Setlist; ct->name; ct++) + printf("%-15s %s\n", ct->name, ct->help); + printf("\n"); + settogglehelp(0); + printf("%-15s %s\n", "?", "display help information"); + return 0; + } + + argc--; + argv++; + while (argc--) { + name = *argv++; + ct = getset(name); + if (ct == 0) { + c = GETTOGGLE(name); + if (c == 0) { + fprintf(stderr, "'%s': unknown argument ('unset ?' for help).\n", + name); + return 0; + } else if (Ambiguous(c)) { + fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\n", + name); + return 0; + } + if (c->variable) { + *c->variable = 0; + if (c->actionexplanation) { + printf("%s %s.\n", *c->variable? "Will" : "Won't", + c->actionexplanation); + } + } + if (c->handler) + (*c->handler)(0); + } else if (Ambiguous(ct)) { + fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\n", + name); + return 0; + } else if (ct->handler) { + (*ct->handler)(0); + printf("%s reset to \"%s\".\n", ct->name, (char *)ct->charp); + } else { + *(ct->charp) = _POSIX_VDISABLE; + printf("%s character is '%s'.\n", ct->name, control(*(ct->charp))); + } + } + return 1; +} + +/* + * The following are the data structures and routines for the + * 'mode' command. + */ +#ifdef KLUDGELINEMODE +extern int kludgelinemode; + + static int +dokludgemode() +{ + kludgelinemode = 1; + send_wont(TELOPT_LINEMODE, 1); + send_dont(TELOPT_SGA, 1); + send_dont(TELOPT_ECHO, 1); +} +#endif + + static int +dolinemode() +{ +#ifdef KLUDGELINEMODE + if (kludgelinemode) + send_dont(TELOPT_SGA, 1); +#endif + send_will(TELOPT_LINEMODE, 1); + send_dont(TELOPT_ECHO, 1); + return 1; +} + + static int +docharmode() +{ +#ifdef KLUDGELINEMODE + if (kludgelinemode) + send_do(TELOPT_SGA, 1); + else +#endif + send_wont(TELOPT_LINEMODE, 1); + send_do(TELOPT_ECHO, 1); + return 1; +} + + static int +dolmmode(bit, on) + int bit, on; +{ + unsigned char c; + extern int linemode; + + if (my_want_state_is_wont(TELOPT_LINEMODE)) { + printf("?Need to have LINEMODE option enabled first.\n"); + printf("'mode ?' for help.\n"); + return 0; + } + + if (on) + c = (linemode | bit); + else + c = (linemode & ~bit); + lm_mode(&c, 1, 1); + return 1; +} + + int +setmode(bit) +{ + return dolmmode(bit, 1); +} + + int +clearmode(bit) +{ + return dolmmode(bit, 0); +} + +struct modelist { + char *name; /* command name */ + char *help; /* help string */ + int (*handler)(); /* routine which executes command */ + int needconnect; /* Do we need to be connected to execute? */ + int arg1; +}; + +extern int modehelp(); + +static struct modelist ModeList[] = { + { "character", "Disable LINEMODE option", docharmode, 1 }, +#ifdef KLUDGELINEMODE + { "", "(or disable obsolete line-by-line mode)", 0 }, +#endif + { "line", "Enable LINEMODE option", dolinemode, 1 }, +#ifdef KLUDGELINEMODE + { "", "(or enable obsolete line-by-line mode)", 0 }, +#endif + { "", "", 0 }, + { "", "These require the LINEMODE option to be enabled", 0 }, + { "isig", "Enable signal trapping", setmode, 1, MODE_TRAPSIG }, + { "+isig", 0, setmode, 1, MODE_TRAPSIG }, + { "-isig", "Disable signal trapping", clearmode, 1, MODE_TRAPSIG }, + { "edit", "Enable character editing", setmode, 1, MODE_EDIT }, + { "+edit", 0, setmode, 1, MODE_EDIT }, + { "-edit", "Disable character editing", clearmode, 1, MODE_EDIT }, + { "softtabs", "Enable tab expansion", setmode, 1, MODE_SOFT_TAB }, + { "+softtabs", 0, setmode, 1, MODE_SOFT_TAB }, + { "-softtabs", "Disable character editing", clearmode, 1, MODE_SOFT_TAB }, + { "litecho", "Enable literal character echo", setmode, 1, MODE_LIT_ECHO }, + { "+litecho", 0, setmode, 1, MODE_LIT_ECHO }, + { "-litecho", "Disable literal character echo", clearmode, 1, MODE_LIT_ECHO }, + { "help", 0, modehelp, 0 }, +#ifdef KLUDGELINEMODE + { "kludgeline", 0, dokludgemode, 1 }, +#endif + { "", "", 0 }, + { "?", "Print help information", modehelp, 0 }, + { 0 }, +}; + + + int +modehelp() +{ + struct modelist *mt; + + printf("format is: 'mode Mode', where 'Mode' is one of:\n\n"); + for (mt = ModeList; mt->name; mt++) { + if (mt->help) { + if (*mt->help) + printf("%-15s %s\n", mt->name, mt->help); + else + printf("\n"); + } + } + return 0; +} + +#define GETMODECMD(name) (struct modelist *) \ + genget(name, (char **) ModeList, sizeof(struct modelist)) + + static int +modecmd(argc, argv) + int argc; + char *argv[]; +{ + struct modelist *mt; + + if (argc != 2) { + printf("'mode' command requires an argument\n"); + printf("'mode ?' for help.\n"); + } else if ((mt = GETMODECMD(argv[1])) == 0) { + fprintf(stderr, "Unknown mode '%s' ('mode ?' for help).\n", argv[1]); + } else if (Ambiguous(mt)) { + fprintf(stderr, "Ambiguous mode '%s' ('mode ?' for help).\n", argv[1]); + } else if (mt->needconnect && !connected) { + printf("?Need to be connected first.\n"); + printf("'mode ?' for help.\n"); + } else if (mt->handler) { + return (*mt->handler)(mt->arg1); + } + return 0; +} + +/* + * The following data structures and routines implement the + * "display" command. + */ + + static int +display(argc, argv) + int argc; + char *argv[]; +{ + struct togglelist *tl; + struct setlist *sl; + +#define dotog(tl) if (tl->variable && tl->actionexplanation) { \ + if (*tl->variable) { \ + printf("will"); \ + } else { \ + printf("won't"); \ + } \ + printf(" %s.\n", tl->actionexplanation); \ + } + +#define doset(sl) if (sl->name && *sl->name != ' ') { \ + if (sl->handler == 0) \ + printf("%-15s [%s]\n", sl->name, control(*sl->charp)); \ + else \ + printf("%-15s \"%s\"\n", sl->name, (char *)sl->charp); \ + } + + if (argc == 1) { + for (tl = Togglelist; tl->name; tl++) { + dotog(tl); + } + printf("\n"); + for (sl = Setlist; sl->name; sl++) { + doset(sl); + } + } else { + int i; + + for (i = 1; i < argc; i++) { + sl = getset(argv[i]); + tl = GETTOGGLE(argv[i]); + if (Ambiguous(sl) || Ambiguous(tl)) { + printf("?Ambiguous argument '%s'.\n", argv[i]); + return 0; + } else if (!sl && !tl) { + printf("?Unknown argument '%s'.\n", argv[i]); + return 0; + } else { + if (tl) { + dotog(tl); + } + if (sl) { + doset(sl); + } + } + } + } +/*@*/optionstatus(); +#ifdef ENCRYPTION + EncryptStatus(); +#endif /* ENCRYPTION */ + return 1; +#undef doset +#undef dotog +} + +/* + * The following are the data structures, and many of the routines, + * relating to command processing. + */ + +/* + * Set the escape character. + */ + static int +setescape(argc, argv) + int argc; + char *argv[]; +{ + register char *arg; + char buf[50]; + + printf( + "Deprecated usage - please use 'set escape%s%s' in the future.\n", + (argc > 2)? " ":"", (argc > 2)? argv[1]: ""); + if (argc > 2) + arg = argv[1]; + else { + printf("new escape character: "); + (void) fgets(buf, sizeof(buf), stdin); + arg = buf; + } + if (arg[0] != '\0') + escape = arg[0]; + if (!In3270) { + printf("Escape character is '%s'.\n", control(escape)); + } + (void) fflush(stdout); + return 1; +} + + /*VARARGS*/ + static int +togcrmod() +{ + crmod = !crmod; + printf("Deprecated usage - please use 'toggle crmod' in the future.\n"); + printf("%s map carriage return on output.\n", crmod ? "Will" : "Won't"); + (void) fflush(stdout); + return 1; +} + + /*VARARGS*/ + int +suspend() +{ +#ifdef SIGTSTP + setcommandmode(); + { + long oldrows, oldcols, newrows, newcols, err; + + err = (TerminalWindowSize(&oldrows, &oldcols) == 0) ? 1 : 0; + (void) kill(0, SIGTSTP); + /* + * If we didn't get the window size before the SUSPEND, but we + * can get them now (?), then send the NAWS to make sure that + * we are set up for the right window size. + */ + if (TerminalWindowSize(&newrows, &newcols) && connected && + (err || ((oldrows != newrows) || (oldcols != newcols)))) { + sendnaws(); + } + } + /* reget parameters in case they were changed */ + TerminalSaveState(); + setconnmode(0); +#else + printf("Suspend is not supported. Try the '!' command instead\n"); +#endif + return 1; +} + +#if !defined(TN3270) + /*ARGSUSED*/ + int +shell(argc, argv) + int argc; + char *argv[]; +{ + long oldrows, oldcols, newrows, newcols, err; + + setcommandmode(); + + err = (TerminalWindowSize(&oldrows, &oldcols) == 0) ? 1 : 0; + switch(vfork()) { + case -1: + perror("Fork failed\n"); + break; + + case 0: + { + /* + * Fire up the shell in the child. + */ + register char *shellp, *shellname; + extern char *strrchr(); + + shellp = getenv("SHELL"); + if (shellp == NULL) + shellp = "/bin/sh"; + if ((shellname = strrchr(shellp, '/')) == 0) + shellname = shellp; + else + shellname++; + if (argc > 1) + execl(shellp, shellname, "-c", &saveline[1], 0); + else + execl(shellp, shellname, 0); + perror("Execl"); + _exit(1); + } + default: + (void)wait((int *)0); /* Wait for the shell to complete */ + + if (TerminalWindowSize(&newrows, &newcols) && connected && + (err || ((oldrows != newrows) || (oldcols != newcols)))) { + sendnaws(); + } + break; + } + return 1; +} +#else /* !defined(TN3270) */ +extern int shell(); +#endif /* !defined(TN3270) */ + + /*VARARGS*/ + static +bye(argc, argv) + int argc; /* Number of arguments */ + char *argv[]; /* arguments */ +{ + extern int resettermname; + + if (connected) { + (void) shutdown(net, 2); + printf("Connection closed.\n"); + (void) NetClose(net); + connected = 0; + resettermname = 1; +#if defined(AUTHENTICATION) || defined(ENCRYPTION) + auth_encrypt_connect(connected); +#endif /* defined(AUTHENTICATION) || defined(ENCRYPTION) */ + /* reset options */ + tninit(); +#if defined(TN3270) + SetIn3270(); /* Get out of 3270 mode */ +#endif /* defined(TN3270) */ + } + if ((argc != 2) || (strcmp(argv[1], "fromquit") != 0)) { + longjmp(toplevel, 1); + /* NOTREACHED */ + } + return 1; /* Keep lint, etc., happy */ +} + +/*VARARGS*/ +quit() +{ + (void) call(bye, "bye", "fromquit", 0); + Exit(0); + /*NOTREACHED*/ +} + +/*VARARGS*/ + int +logout() +{ + send_do(TELOPT_LOGOUT, 1); + (void) netflush(); + return 1; +} + + +/* + * The SLC command. + */ + +struct slclist { + char *name; + char *help; + void (*handler)(); + int arg; +}; + +static void slc_help(); + +struct slclist SlcList[] = { + { "export", "Use local special character definitions", + slc_mode_export, 0 }, + { "import", "Use remote special character definitions", + slc_mode_import, 1 }, + { "check", "Verify remote special character definitions", + slc_mode_import, 0 }, + { "help", 0, slc_help, 0 }, + { "?", "Print help information", slc_help, 0 }, + { 0 }, +}; + + static void +slc_help() +{ + struct slclist *c; + + for (c = SlcList; c->name; c++) { + if (c->help) { + if (*c->help) + printf("%-15s %s\n", c->name, c->help); + else + printf("\n"); + } + } +} + + static struct slclist * +getslc(name) + char *name; +{ + return (struct slclist *) + genget(name, (char **) SlcList, sizeof(struct slclist)); +} + + static +slccmd(argc, argv) + int argc; + char *argv[]; +{ + struct slclist *c; + + if (argc != 2) { + fprintf(stderr, + "Need an argument to 'slc' command. 'slc ?' for help.\n"); + return 0; + } + c = getslc(argv[1]); + if (c == 0) { + fprintf(stderr, "'%s': unknown argument ('slc ?' for help).\n", + argv[1]); + return 0; + } + if (Ambiguous(c)) { + fprintf(stderr, "'%s': ambiguous argument ('slc ?' for help).\n", + argv[1]); + return 0; + } + (*c->handler)(c->arg); + slcstate(); + return 1; +} + +/* + * The ENVIRON command. + */ + +struct envlist { + char *name; + char *help; + void (*handler)(); + int narg; +}; + +extern struct env_lst * + env_define P((unsigned char *, unsigned char *)); +extern void + env_undefine P((unsigned char *)), + env_export P((unsigned char *)), + env_unexport P((unsigned char *)), + env_send P((unsigned char *)), +#if defined(OLD_ENVIRON) && defined(ENV_HACK) + env_varval P((unsigned char *)), +#endif + env_list P((void)); +static void + env_help P((void)); + +struct envlist EnvList[] = { + { "define", "Define an environment variable", + (void (*)())env_define, 2 }, + { "undefine", "Undefine an environment variable", + env_undefine, 1 }, + { "export", "Mark an environment variable for automatic export", + env_export, 1 }, + { "unexport", "Don't mark an environment variable for automatic export", + env_unexport, 1 }, + { "send", "Send an environment variable", env_send, 1 }, + { "list", "List the current environment variables", + env_list, 0 }, +#if defined(OLD_ENVIRON) && defined(ENV_HACK) + { "varval", "Reverse VAR and VALUE (auto, right, wrong, status)", + env_varval, 1 }, +#endif + { "help", 0, env_help, 0 }, + { "?", "Print help information", env_help, 0 }, + { 0 }, +}; + + static void +env_help() +{ + struct envlist *c; + + for (c = EnvList; c->name; c++) { + if (c->help) { + if (*c->help) + printf("%-15s %s\n", c->name, c->help); + else + printf("\n"); + } + } +} + + static struct envlist * +getenvcmd(name) + char *name; +{ + return (struct envlist *) + genget(name, (char **) EnvList, sizeof(struct envlist)); +} + +env_cmd(argc, argv) + int argc; + char *argv[]; +{ + struct envlist *c; + + if (argc < 2) { + fprintf(stderr, + "Need an argument to 'environ' command. 'environ ?' for help.\n"); + return 0; + } + c = getenvcmd(argv[1]); + if (c == 0) { + fprintf(stderr, "'%s': unknown argument ('environ ?' for help).\n", + argv[1]); + return 0; + } + if (Ambiguous(c)) { + fprintf(stderr, "'%s': ambiguous argument ('environ ?' for help).\n", + argv[1]); + return 0; + } + if (c->narg + 2 != argc) { + fprintf(stderr, + "Need %s%d argument%s to 'environ %s' command. 'environ ?' for help.\n", + c->narg < argc + 2 ? "only " : "", + c->narg, c->narg == 1 ? "" : "s", c->name); + return 0; + } + (*c->handler)(argv[2], argv[3]); + return 1; +} + +struct env_lst { + struct env_lst *next; /* pointer to next structure */ + struct env_lst *prev; /* pointer to previous structure */ + unsigned char *var; /* pointer to variable name */ + unsigned char *value; /* pointer to variable value */ + int export; /* 1 -> export with default list of variables */ + int welldefined; /* A well defined variable */ +}; + +struct env_lst envlisthead; + + struct env_lst * +env_find(var) + unsigned char *var; +{ + register struct env_lst *ep; + + for (ep = envlisthead.next; ep; ep = ep->next) { + if (strcmp((char *)ep->var, (char *)var) == 0) + return(ep); + } + return(NULL); +} + + void +env_init() +{ + extern char **environ; + register char **epp, *cp; + register struct env_lst *ep; + extern char *strchr(); + + for (epp = environ; *epp; epp++) { + if (cp = strchr(*epp, '=')) { + *cp = '\0'; + ep = env_define((unsigned char *)*epp, + (unsigned char *)cp+1); + ep->export = 0; + *cp = '='; + } + } + /* + * Special case for DISPLAY variable. If it is ":0.0" or + * "unix:0.0", we have to get rid of "unix" and insert our + * hostname. + */ + if ((ep = env_find("DISPLAY")) + && ((*ep->value == ':') + || (strncmp((char *)ep->value, "unix:", 5) == 0))) { + char hbuf[256+1]; + char *cp2 = strchr((char *)ep->value, ':'); + + gethostname(hbuf, 256); + hbuf[256] = '\0'; + cp = (char *)malloc(strlen(hbuf) + strlen(cp2) + 1); + sprintf((char *)cp, "%s%s", hbuf, cp2); + free(ep->value); + ep->value = (unsigned char *)cp; + } + /* + * If USER is not defined, but LOGNAME is, then add + * USER with the value from LOGNAME. By default, we + * don't export the USER variable. + */ + if ((env_find("USER") == NULL) && (ep = env_find("LOGNAME"))) { + env_define((unsigned char *)"USER", ep->value); + env_unexport((unsigned char *)"USER"); + } + env_export((unsigned char *)"DISPLAY"); + env_export((unsigned char *)"PRINTER"); +} + + struct env_lst * +env_define(var, value) + unsigned char *var, *value; +{ + register struct env_lst *ep; + + if (ep = env_find(var)) { + if (ep->var) + free(ep->var); + if (ep->value) + free(ep->value); + } else { + ep = (struct env_lst *)malloc(sizeof(struct env_lst)); + ep->next = envlisthead.next; + envlisthead.next = ep; + ep->prev = &envlisthead; + if (ep->next) + ep->next->prev = ep; + } + ep->welldefined = opt_welldefined(var); + ep->export = 1; + ep->var = (unsigned char *)strdup((char *)var); + ep->value = (unsigned char *)strdup((char *)value); + return(ep); +} + + void +env_undefine(var) + unsigned char *var; +{ + register struct env_lst *ep; + + if (ep = env_find(var)) { + ep->prev->next = ep->next; + if (ep->next) + ep->next->prev = ep->prev; + if (ep->var) + free(ep->var); + if (ep->value) + free(ep->value); + free(ep); + } +} + + void +env_export(var) + unsigned char *var; +{ + register struct env_lst *ep; + + if (ep = env_find(var)) + ep->export = 1; +} + + void +env_unexport(var) + unsigned char *var; +{ + register struct env_lst *ep; + + if (ep = env_find(var)) + ep->export = 0; +} + + void +env_send(var) + unsigned char *var; +{ + register struct env_lst *ep; + + if (my_state_is_wont(TELOPT_NEW_ENVIRON) +#ifdef OLD_ENVIRON + && my_state_is_wont(TELOPT_OLD_ENVIRON) +#endif + ) { + fprintf(stderr, + "Cannot send '%s': Telnet ENVIRON option not enabled\n", + var); + return; + } + ep = env_find(var); + if (ep == 0) { + fprintf(stderr, "Cannot send '%s': variable not defined\n", + var); + return; + } + env_opt_start_info(); + env_opt_add(ep->var); + env_opt_end(0); +} + + void +env_list() +{ + register struct env_lst *ep; + + for (ep = envlisthead.next; ep; ep = ep->next) { + printf("%c %-20s %s\n", ep->export ? '*' : ' ', + ep->var, ep->value); + } +} + + unsigned char * +env_default(init, welldefined) + int init; +{ + static struct env_lst *nep = NULL; + + if (init) { + nep = &envlisthead; + return; + } + if (nep) { + while (nep = nep->next) { + if (nep->export && (nep->welldefined == welldefined)) + return(nep->var); + } + } + return(NULL); +} + + unsigned char * +env_getvalue(var) + unsigned char *var; +{ + register struct env_lst *ep; + + if (ep = env_find(var)) + return(ep->value); + return(NULL); +} + +#if defined(OLD_ENVIRON) && defined(ENV_HACK) + void +env_varval(what) + unsigned char *what; +{ + extern int old_env_var, old_env_value, env_auto; + int len = strlen((char *)what); + + if (len == 0) + goto unknown; + + if (strncasecmp((char *)what, "status", len) == 0) { + if (env_auto) + printf("%s%s", "VAR and VALUE are/will be ", + "determined automatically\n"); + if (old_env_var == OLD_ENV_VAR) + printf("VAR and VALUE set to correct definitions\n"); + else + printf("VAR and VALUE definitions are reversed\n"); + } else if (strncasecmp((char *)what, "auto", len) == 0) { + env_auto = 1; + old_env_var = OLD_ENV_VALUE; + old_env_value = OLD_ENV_VAR; + } else if (strncasecmp((char *)what, "right", len) == 0) { + env_auto = 0; + old_env_var = OLD_ENV_VAR; + old_env_value = OLD_ENV_VALUE; + } else if (strncasecmp((char *)what, "wrong", len) == 0) { + env_auto = 0; + old_env_var = OLD_ENV_VALUE; + old_env_value = OLD_ENV_VAR; + } else { +unknown: + printf("Unknown \"varval\" command. (\"auto\", \"right\", \"wrong\", \"status\")\n"); + } +} +#endif + +#if defined(AUTHENTICATION) +/* + * The AUTHENTICATE command. + */ + +struct authlist { + char *name; + char *help; + int (*handler)(); + int narg; +}; + +extern int + auth_enable P((char *)), + auth_disable P((char *)), + auth_status P((void)); +static int + auth_help P((void)); + +struct authlist AuthList[] = { + { "status", "Display current status of authentication information", + auth_status, 0 }, + { "disable", "Disable an authentication type ('auth disable ?' for more)", + auth_disable, 1 }, + { "enable", "Enable an authentication type ('auth enable ?' for more)", + auth_enable, 1 }, + { "help", 0, auth_help, 0 }, + { "?", "Print help information", auth_help, 0 }, + { 0 }, +}; + + static int +auth_help() +{ + struct authlist *c; + + for (c = AuthList; c->name; c++) { + if (c->help) { + if (*c->help) + printf("%-15s %s\n", c->name, c->help); + else + printf("\n"); + } + } + return 0; +} + +auth_cmd(argc, argv) + int argc; + char *argv[]; +{ + struct authlist *c; + + if (argc < 2) { + fprintf(stderr, + "Need an argument to 'auth' command. 'auth ?' for help.\n"); + return 0; + } + + c = (struct authlist *) + genget(argv[1], (char **) AuthList, sizeof(struct authlist)); + if (c == 0) { + fprintf(stderr, "'%s': unknown argument ('auth ?' for help).\n", + argv[1]); + return 0; + } + if (Ambiguous(c)) { + fprintf(stderr, "'%s': ambiguous argument ('auth ?' for help).\n", + argv[1]); + return 0; + } + if (c->narg + 2 != argc) { + fprintf(stderr, + "Need %s%d argument%s to 'auth %s' command. 'auth ?' for help.\n", + c->narg < argc + 2 ? "only " : "", + c->narg, c->narg == 1 ? "" : "s", c->name); + return 0; + } + return((*c->handler)(argv[2], argv[3])); +} +#endif + +#ifdef ENCRYPTION +/* + * The ENCRYPT command. + */ + +struct encryptlist { + char *name; + char *help; + int (*handler)(); + int needconnect; + int minarg; + int maxarg; +}; + +extern int + EncryptEnable P((char *, char *)), + EncryptDisable P((char *, char *)), + EncryptType P((char *, char *)), + EncryptStart P((char *)), + EncryptStartInput P((void)), + EncryptStartOutput P((void)), + EncryptStop P((char *)), + EncryptStopInput P((void)), + EncryptStopOutput P((void)), + EncryptStatus P((void)); +static int + EncryptHelp P((void)); + +struct encryptlist EncryptList[] = { + { "enable", "Enable encryption. ('encrypt enable ?' for more)", + EncryptEnable, 1, 1, 2 }, + { "disable", "Disable encryption. ('encrypt enable ?' for more)", + EncryptDisable, 0, 1, 2 }, + { "type", "Set encryption type. ('encrypt type ?' for more)", + EncryptType, 0, 1, 1 }, + { "start", "Start encryption. ('encrypt start ?' for more)", + EncryptStart, 1, 0, 1 }, + { "stop", "Stop encryption. ('encrypt stop ?' for more)", + EncryptStop, 1, 0, 1 }, + { "input", "Start encrypting the input stream", + EncryptStartInput, 1, 0, 0 }, + { "-input", "Stop encrypting the input stream", + EncryptStopInput, 1, 0, 0 }, + { "output", "Start encrypting the output stream", + EncryptStartOutput, 1, 0, 0 }, + { "-output", "Stop encrypting the output stream", + EncryptStopOutput, 1, 0, 0 }, + + { "status", "Display current status of authentication information", + EncryptStatus, 0, 0, 0 }, + { "help", 0, EncryptHelp, 0, 0, 0 }, + { "?", "Print help information", EncryptHelp, 0, 0, 0 }, + { 0 }, +}; + + static int +EncryptHelp() +{ + struct encryptlist *c; + + for (c = EncryptList; c->name; c++) { + if (c->help) { + if (*c->help) + printf("%-15s %s\n", c->name, c->help); + else + printf("\n"); + } + } + return 0; +} + +encrypt_cmd(argc, argv) + int argc; + char *argv[]; +{ + struct encryptlist *c; + + if (argc < 2) { + fprintf(stderr, + "Need an argument to 'encrypt' command. 'encrypt ?' for help.\n"); + return 0; + } + + c = (struct encryptlist *) + genget(argv[1], (char **) EncryptList, sizeof(struct encryptlist)); + if (c == 0) { + fprintf(stderr, "'%s': unknown argument ('encrypt ?' for help).\n", + argv[1]); + return 0; + } + if (Ambiguous(c)) { + fprintf(stderr, "'%s': ambiguous argument ('encrypt ?' for help).\n", + argv[1]); + return 0; + } + argc -= 2; + if (argc < c->minarg || argc > c->maxarg) { + if (c->minarg == c->maxarg) { + fprintf(stderr, "Need %s%d argument%s ", + c->minarg < argc ? "only " : "", c->minarg, + c->minarg == 1 ? "" : "s"); + } else { + fprintf(stderr, "Need %s%d-%d arguments ", + c->maxarg < argc ? "only " : "", c->minarg, c->maxarg); + } + fprintf(stderr, "to 'encrypt %s' command. 'encrypt ?' for help.\n", + c->name); + return 0; + } + if (c->needconnect && !connected) { + if (!(argc && (isprefix(argv[2], "help") || isprefix(argv[2], "?")))) { + printf("?Need to be connected first.\n"); + return 0; + } + } + return ((*c->handler)(argc > 0 ? argv[2] : 0, + argc > 1 ? argv[3] : 0, + argc > 2 ? argv[4] : 0)); +} +#endif /* ENCRYPTION */ + +#if defined(unix) && defined(TN3270) + static void +filestuff(fd) + int fd; +{ + int res; + +#ifdef F_GETOWN + setconnmode(0); + res = fcntl(fd, F_GETOWN, 0); + setcommandmode(); + + if (res == -1) { + perror("fcntl"); + return; + } + printf("\tOwner is %d.\n", res); +#endif + + setconnmode(0); + res = fcntl(fd, F_GETFL, 0); + setcommandmode(); + + if (res == -1) { + perror("fcntl"); + return; + } +#ifdef notdef + printf("\tFlags are 0x%x: %s\n", res, decodeflags(res)); +#endif +} +#endif /* defined(unix) && defined(TN3270) */ + +/* + * Print status about the connection. + */ + /*ARGSUSED*/ + static +status(argc, argv) + int argc; + char *argv[]; +{ + if (connected) { + printf("Connected to %s.\n", hostname); + if ((argc < 2) || strcmp(argv[1], "notmuch")) { + int mode = getconnmode(); + + if (my_want_state_is_will(TELOPT_LINEMODE)) { + printf("Operating with LINEMODE option\n"); + printf("%s line editing\n", (mode&MODE_EDIT) ? "Local" : "No"); + printf("%s catching of signals\n", + (mode&MODE_TRAPSIG) ? "Local" : "No"); + slcstate(); +#ifdef KLUDGELINEMODE + } else if (kludgelinemode && my_want_state_is_dont(TELOPT_SGA)) { + printf("Operating in obsolete linemode\n"); +#endif + } else { + printf("Operating in single character mode\n"); + if (localchars) + printf("Catching signals locally\n"); + } + printf("%s character echo\n", (mode&MODE_ECHO) ? "Local" : "Remote"); + if (my_want_state_is_will(TELOPT_LFLOW)) + printf("%s flow control\n", (mode&MODE_FLOW) ? "Local" : "No"); +#ifdef ENCRYPTION + encrypt_display(); +#endif /* ENCRYPTION */ + } + } else { + printf("No connection.\n"); + } +# if !defined(TN3270) + printf("Escape character is '%s'.\n", control(escape)); + (void) fflush(stdout); +# else /* !defined(TN3270) */ + if ((!In3270) && ((argc < 2) || strcmp(argv[1], "notmuch"))) { + printf("Escape character is '%s'.\n", control(escape)); + } +# if defined(unix) + if ((argc >= 2) && !strcmp(argv[1], "everything")) { + printf("SIGIO received %d time%s.\n", + sigiocount, (sigiocount == 1)? "":"s"); + if (In3270) { + printf("Process ID %d, process group %d.\n", + getpid(), getpgrp(getpid())); + printf("Terminal input:\n"); + filestuff(tin); + printf("Terminal output:\n"); + filestuff(tout); + printf("Network socket:\n"); + filestuff(net); + } + } + if (In3270 && transcom) { + printf("Transparent mode command is '%s'.\n", transcom); + } +# endif /* defined(unix) */ + (void) fflush(stdout); + if (In3270) { + return 0; + } +# endif /* defined(TN3270) */ + return 1; +} + +#ifdef SIGINFO +/* + * Function that gets called when SIGINFO is received. + */ +ayt_status() +{ + (void) call(status, "status", "notmuch", 0); +} +#endif + +unsigned long inet_addr(); + + int +tn(argc, argv) + int argc; + char *argv[]; +{ + register struct hostent *host = 0; + struct sockaddr_in sin; + struct servent *sp = 0; + unsigned long temp; + extern char *inet_ntoa(); +#if defined(IP_OPTIONS) && defined(IPPROTO_IP) + char *srp = 0, *strrchr(); + unsigned long sourceroute(), srlen; +#endif + char *cmd, *hostp = 0, *portp = 0, *user = 0; + + /* clear the socket address prior to use */ + memset((char *)&sin, 0, sizeof(sin)); + + if (connected) { + printf("?Already connected to %s\n", hostname); + setuid(getuid()); + return 0; + } + if (argc < 2) { + (void) strcpy(line, "open "); + printf("(to) "); + (void) fgets(&line[strlen(line)], sizeof(line) - strlen(line), stdin); + makeargv(); + argc = margc; + argv = margv; + } + cmd = *argv; + --argc; ++argv; + while (argc) { + if (strcmp(*argv, "help") == 0 || isprefix(*argv, "?")) + goto usage; + if (strcmp(*argv, "-l") == 0) { + --argc; ++argv; + if (argc == 0) + goto usage; + user = *argv++; + --argc; + continue; + } + if (strcmp(*argv, "-a") == 0) { + --argc; ++argv; + autologin = 1; + continue; + } + if (hostp == 0) { + hostp = *argv++; + --argc; + continue; + } + if (portp == 0) { + portp = *argv++; + --argc; + continue; + } + usage: + printf("usage: %s [-l user] [-a] host-name [port]\n", cmd); + setuid(getuid()); + return 0; + } + if (hostp == 0) + goto usage; + +#if defined(IP_OPTIONS) && defined(IPPROTO_IP) + if (hostp[0] == '@' || hostp[0] == '!') { + if ((hostname = strrchr(hostp, ':')) == NULL) + hostname = strrchr(hostp, '@'); + hostname++; + srp = 0; + temp = sourceroute(hostp, &srp, &srlen); + if (temp == 0) { + herror(srp); + setuid(getuid()); + return 0; + } else if (temp == -1) { + printf("Bad source route option: %s\n", hostp); + setuid(getuid()); + return 0; + } else { + sin.sin_addr.s_addr = temp; + sin.sin_family = AF_INET; + } + } else { +#endif + temp = inet_addr(hostp); + if (temp != (unsigned long) -1) { + sin.sin_addr.s_addr = temp; + sin.sin_family = AF_INET; + (void) strcpy(_hostname, hostp); + hostname = _hostname; + } else { + host = gethostbyname(hostp); + if (host) { + sin.sin_family = host->h_addrtype; +#if defined(h_addr) /* In 4.3, this is a #define */ + memmove((caddr_t)&sin.sin_addr, + host->h_addr_list[0], host->h_length); +#else /* defined(h_addr) */ + memmove((caddr_t)&sin.sin_addr, host->h_addr, host->h_length); +#endif /* defined(h_addr) */ + strncpy(_hostname, host->h_name, sizeof(_hostname)); + _hostname[sizeof(_hostname)-1] = '\0'; + hostname = _hostname; + } else { + herror(hostp); + setuid(getuid()); + return 0; + } + } +#if defined(IP_OPTIONS) && defined(IPPROTO_IP) + } +#endif + if (portp) { + if (*portp == '-') { + portp++; + telnetport = 1; + } else + telnetport = 0; + sin.sin_port = atoi(portp); + if (sin.sin_port == 0) { + sp = getservbyname(portp, "tcp"); + if (sp) + sin.sin_port = sp->s_port; + else { + printf("%s: bad port number\n", portp); + setuid(getuid()); + return 0; + } + } else { +#if !defined(htons) + u_short htons P((unsigned short)); +#endif /* !defined(htons) */ + sin.sin_port = htons(sin.sin_port); + } + } else { + if (sp == 0) { + sp = getservbyname("telnet", "tcp"); + if (sp == 0) { + fprintf(stderr, "telnet: tcp/telnet: unknown service\n"); + setuid(getuid()); + return 0; + } + sin.sin_port = sp->s_port; + } + telnetport = 1; + } + printf("Trying %s...\n", inet_ntoa(sin.sin_addr)); + do { + net = socket(AF_INET, SOCK_STREAM, 0); + setuid(getuid()); + if (net < 0) { + perror("telnet: socket"); + return 0; + } +#if defined(IP_OPTIONS) && defined(IPPROTO_IP) + if (srp && setsockopt(net, IPPROTO_IP, IP_OPTIONS, (char *)srp, srlen) < 0) + perror("setsockopt (IP_OPTIONS)"); +#endif +#if defined(IPPROTO_IP) && defined(IP_TOS) + { +# if defined(HAS_GETTOS) + struct tosent *tp; + if (tos < 0 && (tp = gettosbyname("telnet", "tcp"))) + tos = tp->t_tos; +# endif + if (tos < 0) + tos = 020; /* Low Delay bit */ + if (tos + && (setsockopt(net, IPPROTO_IP, IP_TOS, + (char *)&tos, sizeof(int)) < 0) + && (errno != ENOPROTOOPT)) + perror("telnet: setsockopt (IP_TOS) (ignored)"); + } +#endif /* defined(IPPROTO_IP) && defined(IP_TOS) */ + + if (debug && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 1) < 0) { + perror("setsockopt (SO_DEBUG)"); + } + + if (connect(net, (struct sockaddr *)&sin, sizeof (sin)) < 0) { +#if defined(h_addr) /* In 4.3, this is a #define */ + if (host && host->h_addr_list[1]) { + int oerrno = errno; + + fprintf(stderr, "telnet: connect to address %s: ", + inet_ntoa(sin.sin_addr)); + errno = oerrno; + perror((char *)0); + host->h_addr_list++; + memmove((caddr_t)&sin.sin_addr, + host->h_addr_list[0], host->h_length); + (void) NetClose(net); + continue; + } +#endif /* defined(h_addr) */ + perror("telnet: Unable to connect to remote host"); + return 0; + } + connected++; +#if defined(AUTHENTICATION) || defined(ENCRYPTION) + auth_encrypt_connect(connected); +#endif /* defined(AUTHENTICATION) || defined(ENCRYPTION) */ + } while (connected == 0); + cmdrc(hostp, hostname); + if (autologin && user == NULL) { + struct passwd *pw; + + user = getenv("USER"); + if (user == NULL || + (pw = getpwnam(user)) && pw->pw_uid != getuid()) { + if (pw = getpwuid(getuid())) + user = pw->pw_name; + else + user = NULL; + } + } + if (user) { + env_define((unsigned char *)"USER", (unsigned char *)user); + env_export((unsigned char *)"USER"); + } + (void) call(status, "status", "notmuch", 0); + if (setjmp(peerdied) == 0) + telnet(user); + (void) NetClose(net); + ExitString("Connection closed by foreign host.\n",1); + /*NOTREACHED*/ +} + +#define HELPINDENT (sizeof ("connect")) + +static char + openhelp[] = "connect to a site", + closehelp[] = "close current connection", + logouthelp[] = "forcibly logout remote user and close the connection", + quithelp[] = "exit telnet", + statushelp[] = "print status information", + helphelp[] = "print help information", + sendhelp[] = "transmit special characters ('send ?' for more)", + sethelp[] = "set operating parameters ('set ?' for more)", + unsethelp[] = "unset operating parameters ('unset ?' for more)", + togglestring[] ="toggle operating parameters ('toggle ?' for more)", + slchelp[] = "change state of special charaters ('slc ?' for more)", + displayhelp[] = "display operating parameters", +#if defined(TN3270) && defined(unix) + transcomhelp[] = "specify Unix command for transparent mode pipe", +#endif /* defined(TN3270) && defined(unix) */ +#if defined(AUTHENTICATION) + authhelp[] = "turn on (off) authentication ('auth ?' for more)", +#endif +#ifdef ENCRYPTION + encrypthelp[] = "turn on (off) encryption ('encrypt ?' for more)", +#endif /* ENCRYPTION */ +#if defined(unix) + zhelp[] = "suspend telnet", +#endif /* defined(unix) */ + shellhelp[] = "invoke a subshell", + envhelp[] = "change environment variables ('environ ?' for more)", + modestring[] = "try to enter line or character mode ('mode ?' for more)"; + +static int help(); + +static Command cmdtab[] = { + { "close", closehelp, bye, 1 }, + { "logout", logouthelp, logout, 1 }, + { "display", displayhelp, display, 0 }, + { "mode", modestring, modecmd, 0 }, + { "open", openhelp, tn, 0 }, + { "quit", quithelp, quit, 0 }, + { "send", sendhelp, sendcmd, 0 }, + { "set", sethelp, setcmd, 0 }, + { "unset", unsethelp, unsetcmd, 0 }, + { "status", statushelp, status, 0 }, + { "toggle", togglestring, toggle, 0 }, + { "slc", slchelp, slccmd, 0 }, +#if defined(TN3270) && defined(unix) + { "transcom", transcomhelp, settranscom, 0 }, +#endif /* defined(TN3270) && defined(unix) */ +#if defined(AUTHENTICATION) + { "auth", authhelp, auth_cmd, 0 }, +#endif +#ifdef ENCRYPTION + { "encrypt", encrypthelp, encrypt_cmd, 0 }, +#endif /* ENCRYPTION */ +#if defined(unix) + { "z", zhelp, suspend, 0 }, +#endif /* defined(unix) */ +#if defined(TN3270) + { "!", shellhelp, shell, 1 }, +#else + { "!", shellhelp, shell, 0 }, +#endif + { "environ", envhelp, env_cmd, 0 }, + { "?", helphelp, help, 0 }, + 0 +}; + +static char crmodhelp[] = "deprecated command -- use 'toggle crmod' instead"; +static char escapehelp[] = "deprecated command -- use 'set escape' instead"; + +static Command cmdtab2[] = { + { "help", 0, help, 0 }, + { "escape", escapehelp, setescape, 0 }, + { "crmod", crmodhelp, togcrmod, 0 }, + 0 +}; + + +/* + * Call routine with argc, argv set from args (terminated by 0). + */ + + /*VARARGS1*/ + static +call(va_alist) + va_dcl +{ + va_list ap; + typedef int (*intrtn_t)(); + intrtn_t routine; + char *args[100]; + int argno = 0; + + va_start(ap); + routine = (va_arg(ap, intrtn_t)); + while ((args[argno++] = va_arg(ap, char *)) != 0) { + ; + } + va_end(ap); + return (*routine)(argno-1, args); +} + + + static Command * +getcmd(name) + char *name; +{ + Command *cm; + + if (cm = (Command *) genget(name, (char **) cmdtab, sizeof(Command))) + return cm; + return (Command *) genget(name, (char **) cmdtab2, sizeof(Command)); +} + + void +command(top, tbuf, cnt) + int top; + char *tbuf; + int cnt; +{ + register Command *c; + + setcommandmode(); + if (!top) { + putchar('\n'); +#if defined(unix) + } else { + (void) signal(SIGINT, SIG_DFL); + (void) signal(SIGQUIT, SIG_DFL); +#endif /* defined(unix) */ + } + for (;;) { + if (rlogin == _POSIX_VDISABLE) + printf("%s> ", prompt); + if (tbuf) { + register char *cp; + cp = line; + while (cnt > 0 && (*cp++ = *tbuf++) != '\n') + cnt--; + tbuf = 0; + if (cp == line || *--cp != '\n' || cp == line) + goto getline; + *cp = '\0'; + if (rlogin == _POSIX_VDISABLE) + printf("%s\n", line); + } else { + getline: + if (rlogin != _POSIX_VDISABLE) + printf("%s> ", prompt); + if (fgets(line, sizeof(line), stdin) == NULL) { + if (feof(stdin) || ferror(stdin)) { + (void) quit(); + /*NOTREACHED*/ + } + break; + } + } + if (line[0] == 0) + break; + makeargv(); + if (margv[0] == 0) { + break; + } + c = getcmd(margv[0]); + if (Ambiguous(c)) { + printf("?Ambiguous command\n"); + continue; + } + if (c == 0) { + printf("?Invalid command\n"); + continue; + } + if (c->needconnect && !connected) { + printf("?Need to be connected first.\n"); + continue; + } + if ((*c->handler)(margc, margv)) { + break; + } + } + if (!top) { + if (!connected) { + longjmp(toplevel, 1); + /*NOTREACHED*/ + } +#if defined(TN3270) + if (shell_active == 0) { + setconnmode(0); + } +#else /* defined(TN3270) */ + setconnmode(0); +#endif /* defined(TN3270) */ + } +} + +/* + * Help command. + */ + static +help(argc, argv) + int argc; + char *argv[]; +{ + register Command *c; + + if (argc == 1) { + printf("Commands may be abbreviated. Commands are:\n\n"); + for (c = cmdtab; c->name; c++) + if (c->help) { + printf("%-*s\t%s\n", HELPINDENT, c->name, + c->help); + } + return 0; + } + while (--argc > 0) { + register char *arg; + arg = *++argv; + c = getcmd(arg); + if (Ambiguous(c)) + printf("?Ambiguous help command %s\n", arg); + else if (c == (Command *)0) + printf("?Invalid help command %s\n", arg); + else + printf("%s\n", c->help); + } + return 0; +} + +static char *rcname = 0; +static char rcbuf[128]; + +cmdrc(m1, m2) + char *m1, *m2; +{ + register Command *c; + FILE *rcfile; + int gotmachine = 0; + int l1 = strlen(m1); + int l2 = strlen(m2); + char m1save[64]; + + if (skiprc) + return; + + strcpy(m1save, m1); + m1 = m1save; + + if (rcname == 0) { + rcname = getenv("HOME"); + if (rcname) + strcpy(rcbuf, rcname); + else + rcbuf[0] = '\0'; + strcat(rcbuf, "/.telnetrc"); + rcname = rcbuf; + } + + if ((rcfile = fopen(rcname, "r")) == 0) { + return; + } + + for (;;) { + if (fgets(line, sizeof(line), rcfile) == NULL) + break; + if (line[0] == 0) + break; + if (line[0] == '#') + continue; + if (gotmachine) { + if (!isspace(line[0])) + gotmachine = 0; + } + if (gotmachine == 0) { + if (isspace(line[0])) + continue; + if (strncasecmp(line, m1, l1) == 0) + strncpy(line, &line[l1], sizeof(line) - l1); + else if (strncasecmp(line, m2, l2) == 0) + strncpy(line, &line[l2], sizeof(line) - l2); + else if (strncasecmp(line, "DEFAULT", 7) == 0) + strncpy(line, &line[7], sizeof(line) - 7); + else + continue; + if (line[0] != ' ' && line[0] != '\t' && line[0] != '\n') + continue; + gotmachine = 1; + } + makeargv(); + if (margv[0] == 0) + continue; + c = getcmd(margv[0]); + if (Ambiguous(c)) { + printf("?Ambiguous command: %s\n", margv[0]); + continue; + } + if (c == 0) { + printf("?Invalid command: %s\n", margv[0]); + continue; + } + /* + * This should never happen... + */ + if (c->needconnect && !connected) { + printf("?Need to be connected first for %s.\n", margv[0]); + continue; + } + (*c->handler)(margc, margv); + } + fclose(rcfile); +} + +#if defined(IP_OPTIONS) && defined(IPPROTO_IP) + +/* + * Source route is handed in as + * [!]@hop1@hop2...[@|:]dst + * If the leading ! is present, it is a + * strict source route, otherwise it is + * assmed to be a loose source route. + * + * We fill in the source route option as + * hop1,hop2,hop3...dest + * and return a pointer to hop1, which will + * be the address to connect() to. + * + * Arguments: + * arg: pointer to route list to decipher + * + * cpp: If *cpp is not equal to NULL, this is a + * pointer to a pointer to a character array + * that should be filled in with the option. + * + * lenp: pointer to an integer that contains the + * length of *cpp if *cpp != NULL. + * + * Return values: + * + * Returns the address of the host to connect to. If the + * return value is -1, there was a syntax error in the + * option, either unknown characters, or too many hosts. + * If the return value is 0, one of the hostnames in the + * path is unknown, and *cpp is set to point to the bad + * hostname. + * + * *cpp: If *cpp was equal to NULL, it will be filled + * in with a pointer to our static area that has + * the option filled in. This will be 32bit aligned. + * + * *lenp: This will be filled in with how long the option + * pointed to by *cpp is. + * + */ + unsigned long +sourceroute(arg, cpp, lenp) + char *arg; + char **cpp; + int *lenp; +{ + static char lsr[44]; +#ifdef sysV88 + static IOPTN ipopt; +#endif + char *cp, *cp2, *lsrp, *lsrep; + register int tmp; + struct in_addr sin_addr; + register struct hostent *host = 0; + register char c; + + /* + * Verify the arguments, and make sure we have + * at least 7 bytes for the option. + */ + if (cpp == NULL || lenp == NULL) + return((unsigned long)-1); + if (*cpp != NULL && *lenp < 7) + return((unsigned long)-1); + /* + * Decide whether we have a buffer passed to us, + * or if we need to use our own static buffer. + */ + if (*cpp) { + lsrp = *cpp; + lsrep = lsrp + *lenp; + } else { + *cpp = lsrp = lsr; + lsrep = lsrp + 44; + } + + cp = arg; + + /* + * Next, decide whether we have a loose source + * route or a strict source route, and fill in + * the begining of the option. + */ +#ifndef sysV88 + if (*cp == '!') { + cp++; + *lsrp++ = IPOPT_SSRR; + } else + *lsrp++ = IPOPT_LSRR; +#else + if (*cp == '!') { + cp++; + ipopt.io_type = IPOPT_SSRR; + } else + ipopt.io_type = IPOPT_LSRR; +#endif + + if (*cp != '@') + return((unsigned long)-1); + +#ifndef sysV88 + lsrp++; /* skip over length, we'll fill it in later */ + *lsrp++ = 4; +#endif + + cp++; + + sin_addr.s_addr = 0; + + for (c = 0;;) { + if (c == ':') + cp2 = 0; + else for (cp2 = cp; c = *cp2; cp2++) { + if (c == ',') { + *cp2++ = '\0'; + if (*cp2 == '@') + cp2++; + } else if (c == '@') { + *cp2++ = '\0'; + } else if (c == ':') { + *cp2++ = '\0'; + } else + continue; + break; + } + if (!c) + cp2 = 0; + + if ((tmp = inet_addr(cp)) != -1) { + sin_addr.s_addr = tmp; + } else if (host = gethostbyname(cp)) { +#if defined(h_addr) + memmove((caddr_t)&sin_addr, + host->h_addr_list[0], host->h_length); +#else + memmove((caddr_t)&sin_addr, host->h_addr, host->h_length); +#endif + } else { + *cpp = cp; + return(0); + } + memmove(lsrp, (char *)&sin_addr, 4); + lsrp += 4; + if (cp2) + cp = cp2; + else + break; + /* + * Check to make sure there is space for next address + */ + if (lsrp + 4 > lsrep) + return((unsigned long)-1); + } +#ifndef sysV88 + if ((*(*cpp+IPOPT_OLEN) = lsrp - *cpp) <= 7) { + *cpp = 0; + *lenp = 0; + return((unsigned long)-1); + } + *lsrp++ = IPOPT_NOP; /* 32 bit word align it */ + *lenp = lsrp - *cpp; +#else + ipopt.io_len = lsrp - *cpp; + if (ipopt.io_len <= 5) { /* Is 3 better ? */ + *cpp = 0; + *lenp = 0; + return((unsigned long)-1); + } + *lenp = sizeof(ipopt); + *cpp = (char *) &ipopt; +#endif + return(sin_addr.s_addr); +} +#endif diff --git a/telnet/defines.h b/telnet/defines.h new file mode 100644 index 0000000..0978173 --- /dev/null +++ b/telnet/defines.h @@ -0,0 +1,61 @@ +/* + * Copyright (c) 1988, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)defines.h 8.1 (Berkeley) 6/6/93 + */ + +#define settimer(x) clocks.x = clocks.system++ + +#if !defined(TN3270) + +#define SetIn3270() + +#endif /* !defined(TN3270) */ + +#define NETADD(c) { *netoring.supply = c; ring_supplied(&netoring, 1); } +#define NET2ADD(c1,c2) { NETADD(c1); NETADD(c2); } +#define NETBYTES() (ring_full_count(&netoring)) +#define NETROOM() (ring_empty_count(&netoring)) + +#define TTYADD(c) if (!(SYNCHing||flushout)) { \ + *ttyoring.supply = c; \ + ring_supplied(&ttyoring, 1); \ + } +#define TTYBYTES() (ring_full_count(&ttyoring)) +#define TTYROOM() (ring_empty_count(&ttyoring)) + +/* Various modes */ +#define MODE_LOCAL_CHARS(m) ((m)&(MODE_EDIT|MODE_TRAPSIG)) +#define MODE_LOCAL_ECHO(m) ((m)&MODE_ECHO) +#define MODE_COMMAND_LINE(m) ((m)==-1) + +#define CONTROL(x) ((x)&0x1f) /* CTRL(x) is not portable */ diff --git a/telnet/externs.h b/telnet/externs.h new file mode 100644 index 0000000..83ba07b --- /dev/null +++ b/telnet/externs.h @@ -0,0 +1,482 @@ +/* + * Copyright (c) 1988, 1990, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)externs.h 8.3 (Berkeley) 5/30/95 + */ + +#ifndef BSD +# define BSD 43 +#endif + +/* + * ucb stdio.h defines BSD as something wierd + */ +#if defined(sun) && defined(__svr4__) +#define BSD 43 +#endif + +#ifndef USE_TERMIO +# if BSD > 43 || defined(SYSV_TERMIO) +# define USE_TERMIO +# endif +#endif + +#include +#include +#if defined(CRAY) && !defined(NO_BSD_SETJMP) +#include +#endif +#ifndef FILIO_H +#include +#else +#include +#endif +#ifdef CRAY +# include +#endif /* CRAY */ +#ifdef USE_TERMIO +# ifndef VINTR +# ifdef SYSV_TERMIO +# include +# else +# include +# define termio termios +# endif +# endif +#endif +#if defined(NO_CC_T) || !defined(USE_TERMIO) +# if !defined(USE_TERMIO) +typedef char cc_t; +# else +typedef unsigned char cc_t; +# endif +#endif + +#ifndef NO_STRING_H +#include +#else +#include +#endif + +#ifndef _POSIX_VDISABLE +# ifdef sun +# include /* pick up VDISABLE definition, mayby */ +# endif +# ifdef VDISABLE +# define _POSIX_VDISABLE VDISABLE +# else +# define _POSIX_VDISABLE ((cc_t)'\377') +# endif +#endif + +#define SUBBUFSIZE 256 + +#ifndef CRAY +extern int errno; /* outside this world */ +#endif /* !CRAY */ + +#if !defined(P) +# ifdef __STDC__ +# define P(x) x +# else +# define P(x) () +# endif +#endif + +extern int + autologin, /* Autologin enabled */ + skiprc, /* Don't process the ~/.telnetrc file */ + eight, /* use eight bit mode (binary in and/or out */ + flushout, /* flush output */ + connected, /* Are we connected to the other side? */ + globalmode, /* Mode tty should be in */ + In3270, /* Are we in 3270 mode? */ + telnetport, /* Are we connected to the telnet port? */ + localflow, /* Flow control handled locally */ + restartany, /* If flow control, restart output on any character */ + localchars, /* we recognize interrupt/quit */ + donelclchars, /* the user has set "localchars" */ + showoptions, + net, /* Network file descriptor */ + tin, /* Terminal input file descriptor */ + tout, /* Terminal output file descriptor */ + crlf, /* Should '\r' be mapped to (or )? */ + autoflush, /* flush output when interrupting? */ + autosynch, /* send interrupt characters with SYNCH? */ + SYNCHing, /* Is the stream in telnet SYNCH mode? */ + donebinarytoggle, /* the user has put us in binary */ + dontlecho, /* do we suppress local echoing right now? */ + crmod, + netdata, /* Print out network data flow */ + prettydump, /* Print "netdata" output in user readable format */ +#if defined(unix) +#if defined(TN3270) + cursesdata, /* Print out curses data flow */ + apitrace, /* Trace API transactions */ +#endif /* defined(TN3270) */ + termdata, /* Print out terminal data flow */ +#endif /* defined(unix) */ + debug; /* Debug level */ + +extern cc_t escape; /* Escape to command mode */ +extern cc_t rlogin; /* Rlogin mode escape character */ +#ifdef KLUDGELINEMODE +extern cc_t echoc; /* Toggle local echoing */ +#endif + +extern char + *prompt; /* Prompt for command. */ + +extern char + doopt[], + dont[], + will[], + wont[], + options[], /* All the little options */ + *hostname; /* Who are we connected to? */ +#ifdef ENCRYPTION +extern void (*encrypt_output) P((unsigned char *, int)); +extern int (*decrypt_input) P((int)); +#endif /* ENCRYPTION */ + +/* + * We keep track of each side of the option negotiation. + */ + +#define MY_STATE_WILL 0x01 +#define MY_WANT_STATE_WILL 0x02 +#define MY_STATE_DO 0x04 +#define MY_WANT_STATE_DO 0x08 + +/* + * Macros to check the current state of things + */ + +#define my_state_is_do(opt) (options[opt]&MY_STATE_DO) +#define my_state_is_will(opt) (options[opt]&MY_STATE_WILL) +#define my_want_state_is_do(opt) (options[opt]&MY_WANT_STATE_DO) +#define my_want_state_is_will(opt) (options[opt]&MY_WANT_STATE_WILL) + +#define my_state_is_dont(opt) (!my_state_is_do(opt)) +#define my_state_is_wont(opt) (!my_state_is_will(opt)) +#define my_want_state_is_dont(opt) (!my_want_state_is_do(opt)) +#define my_want_state_is_wont(opt) (!my_want_state_is_will(opt)) + +#define set_my_state_do(opt) {options[opt] |= MY_STATE_DO;} +#define set_my_state_will(opt) {options[opt] |= MY_STATE_WILL;} +#define set_my_want_state_do(opt) {options[opt] |= MY_WANT_STATE_DO;} +#define set_my_want_state_will(opt) {options[opt] |= MY_WANT_STATE_WILL;} + +#define set_my_state_dont(opt) {options[opt] &= ~MY_STATE_DO;} +#define set_my_state_wont(opt) {options[opt] &= ~MY_STATE_WILL;} +#define set_my_want_state_dont(opt) {options[opt] &= ~MY_WANT_STATE_DO;} +#define set_my_want_state_wont(opt) {options[opt] &= ~MY_WANT_STATE_WILL;} + +/* + * Make everything symetrical + */ + +#define HIS_STATE_WILL MY_STATE_DO +#define HIS_WANT_STATE_WILL MY_WANT_STATE_DO +#define HIS_STATE_DO MY_STATE_WILL +#define HIS_WANT_STATE_DO MY_WANT_STATE_WILL + +#define his_state_is_do my_state_is_will +#define his_state_is_will my_state_is_do +#define his_want_state_is_do my_want_state_is_will +#define his_want_state_is_will my_want_state_is_do + +#define his_state_is_dont my_state_is_wont +#define his_state_is_wont my_state_is_dont +#define his_want_state_is_dont my_want_state_is_wont +#define his_want_state_is_wont my_want_state_is_dont + +#define set_his_state_do set_my_state_will +#define set_his_state_will set_my_state_do +#define set_his_want_state_do set_my_want_state_will +#define set_his_want_state_will set_my_want_state_do + +#define set_his_state_dont set_my_state_wont +#define set_his_state_wont set_my_state_dont +#define set_his_want_state_dont set_my_want_state_wont +#define set_his_want_state_wont set_my_want_state_dont + + +extern FILE + *NetTrace; /* Where debugging output goes */ +extern unsigned char + NetTraceFile[]; /* Name of file where debugging output goes */ +extern void + SetNetTrace P((char *)); /* Function to change where debugging goes */ + +extern jmp_buf + peerdied, + toplevel; /* For error conditions. */ + +extern void + command P((int, char *, int)), + Dump P((int, unsigned char *, int)), + init_3270 P((void)), + printoption P((char *, int, int)), + printsub P((int, unsigned char *, int)), + sendnaws P((void)), + setconnmode P((int)), + setcommandmode P((void)), + setneturg P((void)), + sys_telnet_init P((void)), + telnet P((char *)), + tel_enter_binary P((int)), + TerminalFlushOutput P((void)), + TerminalNewMode P((int)), + TerminalRestoreState P((void)), + TerminalSaveState P((void)), + tninit P((void)), + upcase P((char *)), + willoption P((int)), + wontoption P((int)); + +extern void + send_do P((int, int)), + send_dont P((int, int)), + send_will P((int, int)), + send_wont P((int, int)); + +extern void + lm_will P((unsigned char *, int)), + lm_wont P((unsigned char *, int)), + lm_do P((unsigned char *, int)), + lm_dont P((unsigned char *, int)), + lm_mode P((unsigned char *, int, int)); + +extern void + slc_init P((void)), + slcstate P((void)), + slc_mode_export P((void)), + slc_mode_import P((int)), + slc_import P((int)), + slc_export P((void)), + slc P((unsigned char *, int)), + slc_check P((void)), + slc_start_reply P((void)), + slc_add_reply P((int, int, int)), + slc_end_reply P((void)); +extern int + slc_update P((void)); + +extern void + env_opt P((unsigned char *, int)), + env_opt_start P((void)), + env_opt_start_info P((void)), + env_opt_add P((unsigned char *)), + env_opt_end P((int)); + +extern unsigned char + *env_default P((int, int)), + *env_getvalue P((unsigned char *)); + +extern int + get_status P((void)), + dosynch P((void)); + +extern cc_t + *tcval P((int)); + +#ifndef USE_TERMIO + +extern struct tchars ntc; +extern struct ltchars nltc; +extern struct sgttyb nttyb; + +# define termEofChar ntc.t_eofc +# define termEraseChar nttyb.sg_erase +# define termFlushChar nltc.t_flushc +# define termIntChar ntc.t_intrc +# define termKillChar nttyb.sg_kill +# define termLiteralNextChar nltc.t_lnextc +# define termQuitChar ntc.t_quitc +# define termSuspChar nltc.t_suspc +# define termRprntChar nltc.t_rprntc +# define termWerasChar nltc.t_werasc +# define termStartChar ntc.t_startc +# define termStopChar ntc.t_stopc +# define termForw1Char ntc.t_brkc +extern cc_t termForw2Char; +extern cc_t termAytChar; + +# define termEofCharp (cc_t *)&ntc.t_eofc +# define termEraseCharp (cc_t *)&nttyb.sg_erase +# define termFlushCharp (cc_t *)&nltc.t_flushc +# define termIntCharp (cc_t *)&ntc.t_intrc +# define termKillCharp (cc_t *)&nttyb.sg_kill +# define termLiteralNextCharp (cc_t *)&nltc.t_lnextc +# define termQuitCharp (cc_t *)&ntc.t_quitc +# define termSuspCharp (cc_t *)&nltc.t_suspc +# define termRprntCharp (cc_t *)&nltc.t_rprntc +# define termWerasCharp (cc_t *)&nltc.t_werasc +# define termStartCharp (cc_t *)&ntc.t_startc +# define termStopCharp (cc_t *)&ntc.t_stopc +# define termForw1Charp (cc_t *)&ntc.t_brkc +# define termForw2Charp (cc_t *)&termForw2Char +# define termAytCharp (cc_t *)&termAytChar + +# else + +extern struct termio new_tc; + +# define termEofChar new_tc.c_cc[VEOF] +# define termEraseChar new_tc.c_cc[VERASE] +# define termIntChar new_tc.c_cc[VINTR] +# define termKillChar new_tc.c_cc[VKILL] +# define termQuitChar new_tc.c_cc[VQUIT] + +# ifndef VSUSP +extern cc_t termSuspChar; +# else +# define termSuspChar new_tc.c_cc[VSUSP] +# endif +# if defined(VFLUSHO) && !defined(VDISCARD) +# define VDISCARD VFLUSHO +# endif +# ifndef VDISCARD +extern cc_t termFlushChar; +# else +# define termFlushChar new_tc.c_cc[VDISCARD] +# endif +# ifndef VWERASE +extern cc_t termWerasChar; +# else +# define termWerasChar new_tc.c_cc[VWERASE] +# endif +# ifndef VREPRINT +extern cc_t termRprntChar; +# else +# define termRprntChar new_tc.c_cc[VREPRINT] +# endif +# ifndef VLNEXT +extern cc_t termLiteralNextChar; +# else +# define termLiteralNextChar new_tc.c_cc[VLNEXT] +# endif +# ifndef VSTART +extern cc_t termStartChar; +# else +# define termStartChar new_tc.c_cc[VSTART] +# endif +# ifndef VSTOP +extern cc_t termStopChar; +# else +# define termStopChar new_tc.c_cc[VSTOP] +# endif +# ifndef VEOL +extern cc_t termForw1Char; +# else +# define termForw1Char new_tc.c_cc[VEOL] +# endif +# ifndef VEOL2 +extern cc_t termForw2Char; +# else +# define termForw2Char new_tc.c_cc[VEOL] +# endif +# ifndef VSTATUS +extern cc_t termAytChar; +#else +# define termAytChar new_tc.c_cc[VSTATUS] +#endif + +# if !defined(CRAY) || defined(__STDC__) +# define termEofCharp &termEofChar +# define termEraseCharp &termEraseChar +# define termIntCharp &termIntChar +# define termKillCharp &termKillChar +# define termQuitCharp &termQuitChar +# define termSuspCharp &termSuspChar +# define termFlushCharp &termFlushChar +# define termWerasCharp &termWerasChar +# define termRprntCharp &termRprntChar +# define termLiteralNextCharp &termLiteralNextChar +# define termStartCharp &termStartChar +# define termStopCharp &termStopChar +# define termForw1Charp &termForw1Char +# define termForw2Charp &termForw2Char +# define termAytCharp &termAytChar +# else + /* Work around a compiler bug */ +# define termEofCharp 0 +# define termEraseCharp 0 +# define termIntCharp 0 +# define termKillCharp 0 +# define termQuitCharp 0 +# define termSuspCharp 0 +# define termFlushCharp 0 +# define termWerasCharp 0 +# define termRprntCharp 0 +# define termLiteralNextCharp 0 +# define termStartCharp 0 +# define termStopCharp 0 +# define termForw1Charp 0 +# define termForw2Charp 0 +# define termAytCharp 0 +# endif +#endif + + +/* Ring buffer structures which are shared */ + +extern Ring + netoring, + netiring, + ttyoring, + ttyiring; + +/* Tn3270 section */ +#if defined(TN3270) + +extern int + HaveInput, /* Whether an asynchronous I/O indication came in */ + noasynchtty, /* Don't do signals on I/O (SIGURG, SIGIO) */ + noasynchnet, /* Don't do signals on I/O (SIGURG, SIGIO) */ + sigiocount, /* Count of SIGIO receptions */ + shell_active; /* Subshell is active */ + +extern char + *Ibackp, /* Oldest byte of 3270 data */ + Ibuf[], /* 3270 buffer */ + *Ifrontp, /* Where next 3270 byte goes */ + tline[], + *transcom; /* Transparent command */ + +extern int + settranscom P((int, char**)); + +extern void + inputAvailable P((int)); +#endif /* defined(TN3270) */ diff --git a/telnet/fdset.h b/telnet/fdset.h new file mode 100644 index 0000000..045bb72 --- /dev/null +++ b/telnet/fdset.h @@ -0,0 +1,49 @@ +/* + * Copyright (c) 1988, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)fdset.h 8.1 (Berkeley) 6/6/93 + */ + +/* + * The following is defined just in case someone should want to run + * this telnet on a 4.2 system. + * + */ + +#ifndef FD_SETSIZE + +#define FD_SET(n, p) ((p)->fds_bits[0] |= (1<<(n))) +#define FD_CLR(n, p) ((p)->fds_bits[0] &= ~(1<<(n))) +#define FD_ISSET(n, p) ((p)->fds_bits[0] & (1<<(n))) +#define FD_ZERO(p) ((p)->fds_bits[0] = 0) + +#endif diff --git a/telnet/general.h b/telnet/general.h new file mode 100644 index 0000000..4efa951 --- /dev/null +++ b/telnet/general.h @@ -0,0 +1,45 @@ +/* + * Copyright (c) 1988, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)general.h 8.1 (Berkeley) 6/6/93 + */ + +/* + * Some general definitions. + */ + + +#define numberof(x) (sizeof x/sizeof x[0]) +#define highestof(x) (numberof(x)-1) + +#define ClearElement(x) memset((char *)&x, 0, sizeof x) +#define ClearArray(x) memset((char *)x, 0, sizeof x) diff --git a/telnet/main.c b/telnet/main.c new file mode 100644 index 0000000..6073dbf --- /dev/null +++ b/telnet/main.c @@ -0,0 +1,322 @@ +/* + * Copyright (c) 1988, 1990, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char copyright[] = +"@(#) Copyright (c) 1988, 1990, 1993\n\ + The Regents of the University of California. All rights reserved.\n"; +#endif /* not lint */ + +#ifndef lint +static char sccsid[] = "@(#)main.c 8.3 (Berkeley) 5/30/95"; +#endif /* not lint */ + +#include + +#include "ring.h" +#include "externs.h" +#include "defines.h" + +/* These values need to be the same as defined in libtelnet/kerberos5.c */ +/* Either define them in both places, or put in some common header file. */ +#define OPTS_FORWARD_CREDS 0x00000002 +#define OPTS_FORWARDABLE_CREDS 0x00000001 + +#if 0 +#define FORWARD +#endif + +/* + * Initialize variables. + */ + void +tninit() +{ + init_terminal(); + + init_network(); + + init_telnet(); + + init_sys(); + +#if defined(TN3270) + init_3270(); +#endif +} + + void +usage() +{ + fprintf(stderr, "Usage: %s %s%s%s%s\n", + prompt, +#ifdef AUTHENTICATION + "[-8] [-E] [-K] [-L] [-S tos] [-X atype] [-a] [-c] [-d] [-e char]", + "\n\t[-k realm] [-l user] [-f/-F] [-n tracefile] ", +#else + "[-8] [-E] [-L] [-S tos] [-a] [-c] [-d] [-e char] [-l user]", + "\n\t[-n tracefile]", +#endif +#if defined(TN3270) && defined(unix) +# ifdef AUTHENTICATION + "[-noasynch] [-noasynctty]\n\t[-noasyncnet] [-r] [-t transcom] ", +# else + "[-noasynch] [-noasynctty] [-noasyncnet] [-r]\n\t[-t transcom]", +# endif +#else + "[-r] ", +#endif +#ifdef ENCRYPTION + "[-x] [host-name [port]]" +#else /* ENCRYPTION */ + "[host-name [port]]" +#endif /* ENCRYPTION */ + ); + exit(1); +} + +/* + * main. Parse arguments, invoke the protocol or command parser. + */ + + +main(argc, argv) + int argc; + char *argv[]; +{ + extern char *optarg; + extern int optind; + int ch; + char *user, *strrchr(); +#ifdef FORWARD + extern int forward_flags; +#endif /* FORWARD */ + + tninit(); /* Clear out things */ +#if defined(CRAY) && !defined(__STDC__) + _setlist_init(); /* Work around compiler bug */ +#endif + + TerminalSaveState(); + + if (prompt = strrchr(argv[0], '/')) + ++prompt; + else + prompt = argv[0]; + + user = NULL; + + rlogin = (strncmp(prompt, "rlog", 4) == 0) ? '~' : _POSIX_VDISABLE; + autologin = -1; + + while ((ch = getopt(argc, argv, "8EKLS:X:acde:fFk:l:n:rt:x")) != EOF) { + switch(ch) { + case '8': + eight = 3; /* binary output and input */ + break; + case 'E': + rlogin = escape = _POSIX_VDISABLE; + break; + case 'K': +#ifdef AUTHENTICATION + autologin = 0; +#endif + break; + case 'L': + eight |= 2; /* binary output only */ + break; + case 'S': + { +#ifdef HAS_GETTOS + extern int tos; + + if ((tos = parsetos(optarg, "tcp")) < 0) + fprintf(stderr, "%s%s%s%s\n", + prompt, ": Bad TOS argument '", + optarg, + "; will try to use default TOS"); +#else + fprintf(stderr, + "%s: Warning: -S ignored, no parsetos() support.\n", + prompt); +#endif + } + break; + case 'X': +#ifdef AUTHENTICATION + auth_disable_name(optarg); +#endif + break; + case 'a': + autologin = 1; + break; + case 'c': + skiprc = 1; + break; + case 'd': + debug = 1; + break; + case 'e': + set_escape_char(optarg); + break; + case 'f': +#if defined(AUTHENTICATION) && defined(KRB5) && defined(FORWARD) + if (forward_flags & OPTS_FORWARD_CREDS) { + fprintf(stderr, + "%s: Only one of -f and -F allowed.\n", + prompt); + usage(); + } + forward_flags |= OPTS_FORWARD_CREDS; +#else + fprintf(stderr, + "%s: Warning: -f ignored, no Kerberos V5 support.\n", + prompt); +#endif + break; + case 'F': +#if defined(AUTHENTICATION) && defined(KRB5) && defined(FORWARD) + if (forward_flags & OPTS_FORWARD_CREDS) { + fprintf(stderr, + "%s: Only one of -f and -F allowed.\n", + prompt); + usage(); + } + forward_flags |= OPTS_FORWARD_CREDS; + forward_flags |= OPTS_FORWARDABLE_CREDS; +#else + fprintf(stderr, + "%s: Warning: -F ignored, no Kerberos V5 support.\n", + prompt); +#endif + break; + case 'k': +#if defined(AUTHENTICATION) && defined(KRB4) + { + extern char *dest_realm, dst_realm_buf[], dst_realm_sz; + dest_realm = dst_realm_buf; + (void)strncpy(dest_realm, optarg, dst_realm_sz); + } +#else + fprintf(stderr, + "%s: Warning: -k ignored, no Kerberos V4 support.\n", + prompt); +#endif + break; + case 'l': + autologin = 1; + user = optarg; + break; + case 'n': +#if defined(TN3270) && defined(unix) + /* distinguish between "-n oasynch" and "-noasynch" */ + if (argv[optind - 1][0] == '-' && argv[optind - 1][1] + == 'n' && argv[optind - 1][2] == 'o') { + if (!strcmp(optarg, "oasynch")) { + noasynchtty = 1; + noasynchnet = 1; + } else if (!strcmp(optarg, "oasynchtty")) + noasynchtty = 1; + else if (!strcmp(optarg, "oasynchnet")) + noasynchnet = 1; + } else +#endif /* defined(TN3270) && defined(unix) */ + SetNetTrace(optarg); + break; + case 'r': + rlogin = '~'; + break; + case 't': +#if defined(TN3270) && defined(unix) + transcom = tline; + (void)strcpy(transcom, optarg); +#else + fprintf(stderr, + "%s: Warning: -t ignored, no TN3270 support.\n", + prompt); +#endif + break; + case 'x': +#ifdef ENCRYPTION + encrypt_auto(1); + decrypt_auto(1); +#else /* ENCRYPTION */ + fprintf(stderr, + "%s: Warning: -x ignored, no ENCRYPT support.\n", + prompt); +#endif /* ENCRYPTION */ + break; + case '?': + default: + usage(); + /* NOTREACHED */ + } + } + if (autologin == -1) + autologin = (rlogin == _POSIX_VDISABLE) ? 0 : 1; + + argc -= optind; + argv += optind; + + if (argc) { + char *args[7], **argp = args; + + if (argc > 2) + usage(); + *argp++ = prompt; + if (user) { + *argp++ = "-l"; + *argp++ = user; + } + *argp++ = argv[0]; /* host */ + if (argc > 1) + *argp++ = argv[1]; /* port */ + *argp = 0; + + if (setjmp(toplevel) != 0) + Exit(0); + if (tn(argp - args, args) == 1) + return (0); + else + return (1); + } + (void)setjmp(toplevel); + for (;;) { +#ifdef TN3270 + if (shell_active) + shell_continue(); + else +#endif + command(1, 0, 0); + } +} diff --git a/telnet/network.c b/telnet/network.c new file mode 100644 index 0000000..0fe5cee --- /dev/null +++ b/telnet/network.c @@ -0,0 +1,177 @@ +/* + * Copyright (c) 1988, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)network.c 8.2 (Berkeley) 12/15/93"; +#endif /* not lint */ + +#include +#include +#include + +#include + +#include + +#include "ring.h" + +#include "defines.h" +#include "externs.h" +#include "fdset.h" + +Ring netoring, netiring; +unsigned char netobuf[2*BUFSIZ], netibuf[BUFSIZ]; + +/* + * Initialize internal network data structures. + */ + + void +init_network() +{ + if (ring_init(&netoring, netobuf, sizeof netobuf) != 1) { + exit(1); + } + if (ring_init(&netiring, netibuf, sizeof netibuf) != 1) { + exit(1); + } + NetTrace = stdout; +} + + +/* + * Check to see if any out-of-band data exists on a socket (for + * Telnet "synch" processing). + */ + + int +stilloob() +{ + static struct timeval timeout = { 0 }; + fd_set excepts; + int value; + + do { + FD_ZERO(&excepts); + FD_SET(net, &excepts); + value = select(net+1, (fd_set *)0, (fd_set *)0, &excepts, &timeout); + } while ((value == -1) && (errno == EINTR)); + + if (value < 0) { + perror("select"); + (void) quit(); + /* NOTREACHED */ + } + if (FD_ISSET(net, &excepts)) { + return 1; + } else { + return 0; + } +} + + +/* + * setneturg() + * + * Sets "neturg" to the current location. + */ + + void +setneturg() +{ + ring_mark(&netoring); +} + + +/* + * netflush + * Send as much data as possible to the network, + * handling requests for urgent data. + * + * The return value indicates whether we did any + * useful work. + */ + + + int +netflush() +{ + register int n, n1; + +#ifdef ENCRYPTION + if (encrypt_output) + ring_encrypt(&netoring, encrypt_output); +#endif /* ENCRYPTION */ + if ((n1 = n = ring_full_consecutive(&netoring)) > 0) { + if (!ring_at_mark(&netoring)) { + n = send(net, (char *)netoring.consume, n, 0); /* normal write */ + } else { + /* + * In 4.2 (and 4.3) systems, there is some question about + * what byte in a sendOOB operation is the "OOB" data. + * To make ourselves compatible, we only send ONE byte + * out of band, the one WE THINK should be OOB (though + * we really have more the TCP philosophy of urgent data + * rather than the Unix philosophy of OOB data). + */ + n = send(net, (char *)netoring.consume, 1, MSG_OOB);/* URGENT data */ + } + } + if (n < 0) { + if (errno != ENOBUFS && errno != EWOULDBLOCK) { + setcommandmode(); + perror(hostname); + (void)NetClose(net); + ring_clear_mark(&netoring); + longjmp(peerdied, -1); + /*NOTREACHED*/ + } + n = 0; + } + if (netdata && n) { + Dump('>', netoring.consume, n); + } + if (n) { + ring_consumed(&netoring, n); + /* + * If we sent all, and more to send, then recurse to pick + * up the other half. + */ + if ((n1 == n) && ring_full_consecutive(&netoring)) { + (void) netflush(); + } + return 1; + } else { + return 0; + } +} diff --git a/telnet/ring.c b/telnet/ring.c new file mode 100644 index 0000000..37dfda8 --- /dev/null +++ b/telnet/ring.c @@ -0,0 +1,362 @@ +/* + * Copyright (c) 1988, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)ring.c 8.2 (Berkeley) 5/30/95"; +#endif /* not lint */ + +/* + * This defines a structure for a ring buffer. + * + * The circular buffer has two parts: + *((( + * full: [consume, supply) + * empty: [supply, consume) + *]]] + * + */ + +#include +#include + +#ifdef size_t +#undef size_t +#endif + +#include +#ifndef FILIO_H +#include +#endif +#include + +#include "ring.h" +#include "general.h" + +/* Internal macros */ + +#if !defined(MIN) +#define MIN(a,b) (((a)<(b))? (a):(b)) +#endif /* !defined(MIN) */ + +#define ring_subtract(d,a,b) (((a)-(b) >= 0)? \ + (a)-(b): (((a)-(b))+(d)->size)) + +#define ring_increment(d,a,c) (((a)+(c) < (d)->top)? \ + (a)+(c) : (((a)+(c))-(d)->size)) + +#define ring_decrement(d,a,c) (((a)-(c) >= (d)->bottom)? \ + (a)-(c) : (((a)-(c))-(d)->size)) + + +/* + * The following is a clock, used to determine full, empty, etc. + * + * There is some trickiness here. Since the ring buffers are initialized + * to ZERO on allocation, we need to make sure, when interpreting the + * clock, that when the times are EQUAL, then the buffer is FULL. + */ +static u_long ring_clock = 0; + + +#define ring_empty(d) (((d)->consume == (d)->supply) && \ + ((d)->consumetime >= (d)->supplytime)) +#define ring_full(d) (((d)->supply == (d)->consume) && \ + ((d)->supplytime > (d)->consumetime)) + + + + + +/* Buffer state transition routines */ + + ring_init(ring, buffer, count) +Ring *ring; + unsigned char *buffer; + int count; +{ + memset((char *)ring, 0, sizeof *ring); + + ring->size = count; + + ring->supply = ring->consume = ring->bottom = buffer; + + ring->top = ring->bottom+ring->size; + +#ifdef ENCRYPTION + ring->clearto = 0; +#endif /* ENCRYPTION */ + + return 1; +} + +/* Mark routines */ + +/* + * Mark the most recently supplied byte. + */ + + void +ring_mark(ring) + Ring *ring; +{ + ring->mark = ring_decrement(ring, ring->supply, 1); +} + +/* + * Is the ring pointing to the mark? + */ + + int +ring_at_mark(ring) + Ring *ring; +{ + if (ring->mark == ring->consume) { + return 1; + } else { + return 0; + } +} + +/* + * Clear any mark set on the ring. + */ + + void +ring_clear_mark(ring) + Ring *ring; +{ + ring->mark = 0; +} + +/* + * Add characters from current segment to ring buffer. + */ + void +ring_supplied(ring, count) + Ring *ring; + int count; +{ + ring->supply = ring_increment(ring, ring->supply, count); + ring->supplytime = ++ring_clock; +} + +/* + * We have just consumed "c" bytes. + */ + void +ring_consumed(ring, count) + Ring *ring; + int count; +{ + if (count == 0) /* don't update anything */ + return; + + if (ring->mark && + (ring_subtract(ring, ring->mark, ring->consume) < count)) { + ring->mark = 0; + } +#ifdef ENCRYPTION + if (ring->consume < ring->clearto && + ring->clearto <= ring->consume + count) + ring->clearto = 0; + else if (ring->consume + count > ring->top && + ring->bottom <= ring->clearto && + ring->bottom + ((ring->consume + count) - ring->top)) + ring->clearto = 0; +#endif /* ENCRYPTION */ + ring->consume = ring_increment(ring, ring->consume, count); + ring->consumetime = ++ring_clock; + /* + * Try to encourage "ring_empty_consecutive()" to be large. + */ + if (ring_empty(ring)) { + ring->consume = ring->supply = ring->bottom; + } +} + + + +/* Buffer state query routines */ + + +/* Number of bytes that may be supplied */ + int +ring_empty_count(ring) + Ring *ring; +{ + if (ring_empty(ring)) { /* if empty */ + return ring->size; + } else { + return ring_subtract(ring, ring->consume, ring->supply); + } +} + +/* number of CONSECUTIVE bytes that may be supplied */ + int +ring_empty_consecutive(ring) + Ring *ring; +{ + if ((ring->consume < ring->supply) || ring_empty(ring)) { + /* + * if consume is "below" supply, or empty, then + * return distance to the top + */ + return ring_subtract(ring, ring->top, ring->supply); + } else { + /* + * else, return what we may. + */ + return ring_subtract(ring, ring->consume, ring->supply); + } +} + +/* Return the number of bytes that are available for consuming + * (but don't give more than enough to get to cross over set mark) + */ + + int +ring_full_count(ring) + Ring *ring; +{ + if ((ring->mark == 0) || (ring->mark == ring->consume)) { + if (ring_full(ring)) { + return ring->size; /* nothing consumed, but full */ + } else { + return ring_subtract(ring, ring->supply, ring->consume); + } + } else { + return ring_subtract(ring, ring->mark, ring->consume); + } +} + +/* + * Return the number of CONSECUTIVE bytes available for consuming. + * However, don't return more than enough to cross over set mark. + */ + int +ring_full_consecutive(ring) + Ring *ring; +{ + if ((ring->mark == 0) || (ring->mark == ring->consume)) { + if ((ring->supply < ring->consume) || ring_full(ring)) { + return ring_subtract(ring, ring->top, ring->consume); + } else { + return ring_subtract(ring, ring->supply, ring->consume); + } + } else { + if (ring->mark < ring->consume) { + return ring_subtract(ring, ring->top, ring->consume); + } else { /* Else, distance to mark */ + return ring_subtract(ring, ring->mark, ring->consume); + } + } +} + +/* + * Move data into the "supply" portion of of the ring buffer. + */ + void +ring_supply_data(ring, buffer, count) + Ring *ring; + unsigned char *buffer; + int count; +{ + int i; + + while (count) { + i = MIN(count, ring_empty_consecutive(ring)); + memmove(ring->supply, buffer, i); + ring_supplied(ring, i); + count -= i; + buffer += i; + } +} + +#ifdef notdef + +/* + * Move data from the "consume" portion of the ring buffer + */ + void +ring_consume_data(ring, buffer, count) + Ring *ring; + unsigned char *buffer; + int count; +{ + int i; + + while (count) { + i = MIN(count, ring_full_consecutive(ring)); + memmove(buffer, ring->consume, i); + ring_consumed(ring, i); + count -= i; + buffer += i; + } +} +#endif + +#ifdef ENCRYPTION + void +ring_encrypt(ring, encryptor) + Ring *ring; + void (*encryptor)(); +{ + unsigned char *s, *c; + + if (ring_empty(ring) || ring->clearto == ring->supply) + return; + + if (!(c = ring->clearto)) + c = ring->consume; + + s = ring->supply; + + if (s <= c) { + (*encryptor)(c, ring->top - c); + (*encryptor)(ring->bottom, s - ring->bottom); + } else + (*encryptor)(c, s - c); + + ring->clearto = ring->supply; +} + + void +ring_clearto(ring) + Ring *ring; +{ + if (!ring_empty(ring)) + ring->clearto = ring->supply; + else + ring->clearto = 0; +} +#endif /* ENCRYPTION */ diff --git a/telnet/ring.h b/telnet/ring.h new file mode 100644 index 0000000..2a36781 --- /dev/null +++ b/telnet/ring.h @@ -0,0 +1,105 @@ +/* + * Copyright (c) 1988, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)ring.h 8.1 (Berkeley) 6/6/93 + */ + +#if defined(P) +# undef P +#endif + +#if defined(__STDC__) || defined(LINT_ARGS) +# define P(x) x +#else +# define P(x) () +#endif + +/* + * This defines a structure for a ring buffer. + * + * The circular buffer has two parts: + *((( + * full: [consume, supply) + * empty: [supply, consume) + *]]] + * + */ +typedef struct { + unsigned char *consume, /* where data comes out of */ + *supply, /* where data comes in to */ + *bottom, /* lowest address in buffer */ + *top, /* highest address+1 in buffer */ + *mark; /* marker (user defined) */ +#ifdef ENCRYPTION + unsigned char *clearto; /* Data to this point is clear text */ + unsigned char *encryyptedto; /* Data is encrypted to here */ +#endif /* ENCRYPTION */ + int size; /* size in bytes of buffer */ + u_long consumetime, /* help us keep straight full, empty, etc. */ + supplytime; +} Ring; + +/* Here are some functions and macros to deal with the ring buffer */ + +/* Initialization routine */ +extern int + ring_init P((Ring *ring, unsigned char *buffer, int count)); + +/* Data movement routines */ +extern void + ring_supply_data P((Ring *ring, unsigned char *buffer, int count)); +#ifdef notdef +extern void + ring_consume_data P((Ring *ring, unsigned char *buffer, int count)); +#endif + +/* Buffer state transition routines */ +extern void + ring_supplied P((Ring *ring, int count)), + ring_consumed P((Ring *ring, int count)); + +/* Buffer state query routines */ +extern int + ring_empty_count P((Ring *ring)), + ring_empty_consecutive P((Ring *ring)), + ring_full_count P((Ring *ring)), + ring_full_consecutive P((Ring *ring)); + +#ifdef ENCRYPTION +extern void + ring_encrypt P((Ring *ring, void (*func)())), + ring_clearto P((Ring *ring)); +#endif /* ENCRYPTION */ + +extern void + ring_clear_mark(), + ring_mark(); diff --git a/telnet/sys_bsd.c b/telnet/sys_bsd.c new file mode 100644 index 0000000..f2769ac --- /dev/null +++ b/telnet/sys_bsd.c @@ -0,0 +1,1220 @@ +/* + * Copyright (c) 1988, 1990, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)sys_bsd.c 8.4 (Berkeley) 5/30/95"; +#endif /* not lint */ + +/* + * The following routines try to encapsulate what is system dependent + * (at least between 4.x and dos) which is used in telnet.c. + */ + + +#include +#include +#include +#include +#include +#include +#include + +#include "ring.h" + +#include "fdset.h" + +#include "defines.h" +#include "externs.h" +#include "types.h" + +#if defined(CRAY) || (defined(USE_TERMIO) && !defined(SYSV_TERMIO)) +#define SIG_FUNC_RET void +#else +#define SIG_FUNC_RET int +#endif + +#ifdef SIGINFO +extern SIG_FUNC_RET ayt_status(); +#endif + +int + tout, /* Output file descriptor */ + tin, /* Input file descriptor */ + net; + +#ifndef USE_TERMIO +struct tchars otc = { 0 }, ntc = { 0 }; +struct ltchars oltc = { 0 }, nltc = { 0 }; +struct sgttyb ottyb = { 0 }, nttyb = { 0 }; +int olmode = 0; +# define cfgetispeed(ptr) (ptr)->sg_ispeed +# define cfgetospeed(ptr) (ptr)->sg_ospeed +# define old_tc ottyb + +#else /* USE_TERMIO */ +struct termio old_tc = { 0 }; +extern struct termio new_tc; + +# ifndef TCSANOW +# ifdef TCSETS +# define TCSANOW TCSETS +# define TCSADRAIN TCSETSW +# define tcgetattr(f, t) ioctl(f, TCGETS, (char *)t) +# else +# ifdef TCSETA +# define TCSANOW TCSETA +# define TCSADRAIN TCSETAW +# define tcgetattr(f, t) ioctl(f, TCGETA, (char *)t) +# else +# define TCSANOW TIOCSETA +# define TCSADRAIN TIOCSETAW +# define tcgetattr(f, t) ioctl(f, TIOCGETA, (char *)t) +# endif +# endif +# define tcsetattr(f, a, t) ioctl(f, a, (char *)t) +# define cfgetospeed(ptr) ((ptr)->c_cflag&CBAUD) +# ifdef CIBAUD +# define cfgetispeed(ptr) (((ptr)->c_cflag&CIBAUD) >> IBSHIFT) +# else +# define cfgetispeed(ptr) cfgetospeed(ptr) +# endif +# endif /* TCSANOW */ +# ifdef sysV88 +# define TIOCFLUSH TC_PX_DRAIN +# endif +#endif /* USE_TERMIO */ + +static fd_set ibits, obits, xbits; + + + void +init_sys() +{ + tout = fileno(stdout); + tin = fileno(stdin); + FD_ZERO(&ibits); + FD_ZERO(&obits); + FD_ZERO(&xbits); + + errno = 0; +} + + + int +TerminalWrite(buf, n) + char *buf; + int n; +{ + return write(tout, buf, n); +} + + int +TerminalRead(buf, n) + unsigned char *buf; + int n; +{ + return read(tin, buf, n); +} + +/* + * + */ + + int +TerminalAutoFlush() +{ +#if defined(LNOFLSH) + int flush; + + ioctl(0, TIOCLGET, (char *)&flush); + return !(flush&LNOFLSH); /* if LNOFLSH, no autoflush */ +#else /* LNOFLSH */ + return 1; +#endif /* LNOFLSH */ +} + +#ifdef KLUDGELINEMODE +extern int kludgelinemode; +#endif +/* + * TerminalSpecialChars() + * + * Look at an input character to see if it is a special character + * and decide what to do. + * + * Output: + * + * 0 Don't add this character. + * 1 Do add this character + */ + +extern void xmitAO(), xmitEL(), xmitEC(), intp(), sendbrk(); + + int +TerminalSpecialChars(c) + int c; +{ + if (c == termIntChar) { + intp(); + return 0; + } else if (c == termQuitChar) { +#ifdef KLUDGELINEMODE + if (kludgelinemode) + sendbrk(); + else +#endif + sendabort(); + return 0; + } else if (c == termEofChar) { + if (my_want_state_is_will(TELOPT_LINEMODE)) { + sendeof(); + return 0; + } + return 1; + } else if (c == termSuspChar) { + sendsusp(); + return(0); + } else if (c == termFlushChar) { + xmitAO(); /* Transmit Abort Output */ + return 0; + } else if (!MODE_LOCAL_CHARS(globalmode)) { + if (c == termKillChar) { + xmitEL(); + return 0; + } else if (c == termEraseChar) { + xmitEC(); /* Transmit Erase Character */ + return 0; + } + } + return 1; +} + + +/* + * Flush output to the terminal + */ + + void +TerminalFlushOutput() +{ +#ifdef TIOCFLUSH + (void) ioctl(fileno(stdout), TIOCFLUSH, (char *) 0); +#else + (void) ioctl(fileno(stdout), TCFLSH, (char *) 0); +#endif +} + + void +TerminalSaveState() +{ +#ifndef USE_TERMIO + ioctl(0, TIOCGETP, (char *)&ottyb); + ioctl(0, TIOCGETC, (char *)&otc); + ioctl(0, TIOCGLTC, (char *)&oltc); + ioctl(0, TIOCLGET, (char *)&olmode); + + ntc = otc; + nltc = oltc; + nttyb = ottyb; + +#else /* USE_TERMIO */ + tcgetattr(0, &old_tc); + + new_tc = old_tc; + +#ifndef VDISCARD + termFlushChar = CONTROL('O'); +#endif +#ifndef VWERASE + termWerasChar = CONTROL('W'); +#endif +#ifndef VREPRINT + termRprntChar = CONTROL('R'); +#endif +#ifndef VLNEXT + termLiteralNextChar = CONTROL('V'); +#endif +#ifndef VSTART + termStartChar = CONTROL('Q'); +#endif +#ifndef VSTOP + termStopChar = CONTROL('S'); +#endif +#ifndef VSTATUS + termAytChar = CONTROL('T'); +#endif +#endif /* USE_TERMIO */ +} + + cc_t * +tcval(func) + register int func; +{ + switch(func) { + case SLC_IP: return(&termIntChar); + case SLC_ABORT: return(&termQuitChar); + case SLC_EOF: return(&termEofChar); + case SLC_EC: return(&termEraseChar); + case SLC_EL: return(&termKillChar); + case SLC_XON: return(&termStartChar); + case SLC_XOFF: return(&termStopChar); + case SLC_FORW1: return(&termForw1Char); +#ifdef USE_TERMIO + case SLC_FORW2: return(&termForw2Char); +# ifdef VDISCARD + case SLC_AO: return(&termFlushChar); +# endif +# ifdef VSUSP + case SLC_SUSP: return(&termSuspChar); +# endif +# ifdef VWERASE + case SLC_EW: return(&termWerasChar); +# endif +# ifdef VREPRINT + case SLC_RP: return(&termRprntChar); +# endif +# ifdef VLNEXT + case SLC_LNEXT: return(&termLiteralNextChar); +# endif +# ifdef VSTATUS + case SLC_AYT: return(&termAytChar); +# endif +#endif + + case SLC_SYNCH: + case SLC_BRK: + case SLC_EOR: + default: + return((cc_t *)0); + } +} + + void +TerminalDefaultChars() +{ +#ifndef USE_TERMIO + ntc = otc; + nltc = oltc; + nttyb.sg_kill = ottyb.sg_kill; + nttyb.sg_erase = ottyb.sg_erase; +#else /* USE_TERMIO */ + memmove(new_tc.c_cc, old_tc.c_cc, sizeof(old_tc.c_cc)); +# ifndef VDISCARD + termFlushChar = CONTROL('O'); +# endif +# ifndef VWERASE + termWerasChar = CONTROL('W'); +# endif +# ifndef VREPRINT + termRprntChar = CONTROL('R'); +# endif +# ifndef VLNEXT + termLiteralNextChar = CONTROL('V'); +# endif +# ifndef VSTART + termStartChar = CONTROL('Q'); +# endif +# ifndef VSTOP + termStopChar = CONTROL('S'); +# endif +# ifndef VSTATUS + termAytChar = CONTROL('T'); +# endif +#endif /* USE_TERMIO */ +} + +#ifdef notdef +void +TerminalRestoreState() +{ +} +#endif + +/* + * TerminalNewMode - set up terminal to a specific mode. + * MODE_ECHO: do local terminal echo + * MODE_FLOW: do local flow control + * MODE_TRAPSIG: do local mapping to TELNET IAC sequences + * MODE_EDIT: do local line editing + * + * Command mode: + * MODE_ECHO|MODE_EDIT|MODE_FLOW|MODE_TRAPSIG + * local echo + * local editing + * local xon/xoff + * local signal mapping + * + * Linemode: + * local/no editing + * Both Linemode and Single Character mode: + * local/remote echo + * local/no xon/xoff + * local/no signal mapping + */ + + + void +TerminalNewMode(f) + register int f; +{ + static int prevmode = 0; +#ifndef USE_TERMIO + struct tchars tc; + struct ltchars ltc; + struct sgttyb sb; + int lmode; +#else /* USE_TERMIO */ + struct termio tmp_tc; +#endif /* USE_TERMIO */ + int onoff; + int old; + cc_t esc; + + globalmode = f&~MODE_FORCE; + if (prevmode == f) + return; + + /* + * Write any outstanding data before switching modes + * ttyflush() returns 0 only when there is no more data + * left to write out, it returns -1 if it couldn't do + * anything at all, otherwise it returns 1 + the number + * of characters left to write. +#ifndef USE_TERMIO + * We would really like ask the kernel to wait for the output + * to drain, like we can do with the TCSADRAIN, but we don't have + * that option. The only ioctl that waits for the output to + * drain, TIOCSETP, also flushes the input queue, which is NOT + * what we want (TIOCSETP is like TCSADFLUSH). +#endif + */ + old = ttyflush(SYNCHing|flushout); + if (old < 0 || old > 1) { +#ifdef USE_TERMIO + tcgetattr(tin, &tmp_tc); +#endif /* USE_TERMIO */ + do { + /* + * Wait for data to drain, then flush again. + */ +#ifdef USE_TERMIO + tcsetattr(tin, TCSADRAIN, &tmp_tc); +#endif /* USE_TERMIO */ + old = ttyflush(SYNCHing|flushout); + } while (old < 0 || old > 1); + } + + old = prevmode; + prevmode = f&~MODE_FORCE; +#ifndef USE_TERMIO + sb = nttyb; + tc = ntc; + ltc = nltc; + lmode = olmode; +#else + tmp_tc = new_tc; +#endif + + if (f&MODE_ECHO) { +#ifndef USE_TERMIO + sb.sg_flags |= ECHO; +#else + tmp_tc.c_lflag |= ECHO; + tmp_tc.c_oflag |= ONLCR; + if (crlf) + tmp_tc.c_iflag |= ICRNL; +#endif + } else { +#ifndef USE_TERMIO + sb.sg_flags &= ~ECHO; +#else + tmp_tc.c_lflag &= ~ECHO; + tmp_tc.c_oflag &= ~ONLCR; +# ifdef notdef + if (crlf) + tmp_tc.c_iflag &= ~ICRNL; +# endif +#endif + } + + if ((f&MODE_FLOW) == 0) { +#ifndef USE_TERMIO + tc.t_startc = _POSIX_VDISABLE; + tc.t_stopc = _POSIX_VDISABLE; +#else + tmp_tc.c_iflag &= ~(IXOFF|IXON); /* Leave the IXANY bit alone */ + } else { + if (restartany < 0) { + tmp_tc.c_iflag |= IXOFF|IXON; /* Leave the IXANY bit alone */ + } else if (restartany > 0) { + tmp_tc.c_iflag |= IXOFF|IXON|IXANY; + } else { + tmp_tc.c_iflag |= IXOFF|IXON; + tmp_tc.c_iflag &= ~IXANY; + } +#endif + } + + if ((f&MODE_TRAPSIG) == 0) { +#ifndef USE_TERMIO + tc.t_intrc = _POSIX_VDISABLE; + tc.t_quitc = _POSIX_VDISABLE; + tc.t_eofc = _POSIX_VDISABLE; + ltc.t_suspc = _POSIX_VDISABLE; + ltc.t_dsuspc = _POSIX_VDISABLE; +#else + tmp_tc.c_lflag &= ~ISIG; +#endif + localchars = 0; + } else { +#ifdef USE_TERMIO + tmp_tc.c_lflag |= ISIG; +#endif + localchars = 1; + } + + if (f&MODE_EDIT) { +#ifndef USE_TERMIO + sb.sg_flags &= ~CBREAK; + sb.sg_flags |= CRMOD; +#else + tmp_tc.c_lflag |= ICANON; +#endif + } else { +#ifndef USE_TERMIO + sb.sg_flags |= CBREAK; + if (f&MODE_ECHO) + sb.sg_flags |= CRMOD; + else + sb.sg_flags &= ~CRMOD; +#else + tmp_tc.c_lflag &= ~ICANON; + tmp_tc.c_iflag &= ~ICRNL; + tmp_tc.c_cc[VMIN] = 1; + tmp_tc.c_cc[VTIME] = 0; +#endif + } + + if ((f&(MODE_EDIT|MODE_TRAPSIG)) == 0) { +#ifndef USE_TERMIO + ltc.t_lnextc = _POSIX_VDISABLE; +#else +# ifdef VLNEXT + tmp_tc.c_cc[VLNEXT] = (cc_t)(_POSIX_VDISABLE); +# endif +#endif + } + + if (f&MODE_SOFT_TAB) { +#ifndef USE_TERMIO + sb.sg_flags |= XTABS; +#else +# ifdef OXTABS + tmp_tc.c_oflag |= OXTABS; +# endif +# ifdef TABDLY + tmp_tc.c_oflag &= ~TABDLY; + tmp_tc.c_oflag |= TAB3; +# endif +#endif + } else { +#ifndef USE_TERMIO + sb.sg_flags &= ~XTABS; +#else +# ifdef OXTABS + tmp_tc.c_oflag &= ~OXTABS; +# endif +# ifdef TABDLY + tmp_tc.c_oflag &= ~TABDLY; +# endif +#endif + } + + if (f&MODE_LIT_ECHO) { +#ifndef USE_TERMIO + lmode &= ~LCTLECH; +#else +# ifdef ECHOCTL + tmp_tc.c_lflag &= ~ECHOCTL; +# endif +#endif + } else { +#ifndef USE_TERMIO + lmode |= LCTLECH; +#else +# ifdef ECHOCTL + tmp_tc.c_lflag |= ECHOCTL; +# endif +#endif + } + + if (f == -1) { + onoff = 0; + } else { +#ifndef USE_TERMIO + if (f & MODE_OUTBIN) + lmode |= LLITOUT; + else + lmode &= ~LLITOUT; + + if (f & MODE_INBIN) + lmode |= LPASS8; + else + lmode &= ~LPASS8; +#else + if (f & MODE_INBIN) + tmp_tc.c_iflag &= ~ISTRIP; + else + tmp_tc.c_iflag |= ISTRIP; + if (f & MODE_OUTBIN) { + tmp_tc.c_cflag &= ~(CSIZE|PARENB); + tmp_tc.c_cflag |= CS8; + tmp_tc.c_oflag &= ~OPOST; + } else { + tmp_tc.c_cflag &= ~(CSIZE|PARENB); + tmp_tc.c_cflag |= old_tc.c_cflag & (CSIZE|PARENB); + tmp_tc.c_oflag |= OPOST; + } +#endif + onoff = 1; + } + + if (f != -1) { +#ifdef SIGTSTP + SIG_FUNC_RET susp(); +#endif /* SIGTSTP */ +#ifdef SIGINFO + SIG_FUNC_RET ayt(); +#endif + +#ifdef SIGTSTP + (void) signal(SIGTSTP, susp); +#endif /* SIGTSTP */ +#ifdef SIGINFO + (void) signal(SIGINFO, ayt); +#endif +#if defined(USE_TERMIO) && defined(NOKERNINFO) + tmp_tc.c_lflag |= NOKERNINFO; +#endif + /* + * We don't want to process ^Y here. It's just another + * character that we'll pass on to the back end. It has + * to process it because it will be processed when the + * user attempts to read it, not when we send it. + */ +#ifndef USE_TERMIO + ltc.t_dsuspc = _POSIX_VDISABLE; +#else +# ifdef VDSUSP + tmp_tc.c_cc[VDSUSP] = (cc_t)(_POSIX_VDISABLE); +# endif +#endif +#ifdef USE_TERMIO + /* + * If the VEOL character is already set, then use VEOL2, + * otherwise use VEOL. + */ + esc = (rlogin != _POSIX_VDISABLE) ? rlogin : escape; + if ((tmp_tc.c_cc[VEOL] != esc) +# ifdef VEOL2 + && (tmp_tc.c_cc[VEOL2] != esc) +# endif + ) { + if (tmp_tc.c_cc[VEOL] == (cc_t)(_POSIX_VDISABLE)) + tmp_tc.c_cc[VEOL] = esc; +# ifdef VEOL2 + else if (tmp_tc.c_cc[VEOL2] == (cc_t)(_POSIX_VDISABLE)) + tmp_tc.c_cc[VEOL2] = esc; +# endif + } +#else + if (tc.t_brkc == (cc_t)(_POSIX_VDISABLE)) + tc.t_brkc = esc; +#endif + } else { +#ifdef SIGINFO + SIG_FUNC_RET ayt_status(); + + (void) signal(SIGINFO, ayt_status); +#endif +#ifdef SIGTSTP + (void) signal(SIGTSTP, SIG_DFL); +# ifndef SOLARIS + (void) sigsetmask(sigblock(0) & ~(1<<(SIGTSTP-1))); +# else SOLARIS + (void) sigrelse(SIGTSTP); +# endif SOLARIS +#endif /* SIGTSTP */ +#ifndef USE_TERMIO + ltc = oltc; + tc = otc; + sb = ottyb; + lmode = olmode; +#else + tmp_tc = old_tc; +#endif + } +#ifndef USE_TERMIO + ioctl(tin, TIOCLSET, (char *)&lmode); + ioctl(tin, TIOCSLTC, (char *)<c); + ioctl(tin, TIOCSETC, (char *)&tc); + ioctl(tin, TIOCSETN, (char *)&sb); +#else + if (tcsetattr(tin, TCSADRAIN, &tmp_tc) < 0) + tcsetattr(tin, TCSANOW, &tmp_tc); +#endif + +#if (!defined(TN3270)) || ((!defined(NOT43)) || defined(PUTCHAR)) +# if !defined(sysV88) + ioctl(tin, FIONBIO, (char *)&onoff); + ioctl(tout, FIONBIO, (char *)&onoff); +# endif +#endif /* (!defined(TN3270)) || ((!defined(NOT43)) || defined(PUTCHAR)) */ +#if defined(TN3270) + if (noasynchtty == 0) { + ioctl(tin, FIOASYNC, (char *)&onoff); + } +#endif /* defined(TN3270) */ + +} + +/* + * Try to guess whether speeds are "encoded" (4.2BSD) or just numeric (4.4BSD). + */ +#if B4800 != 4800 +#define DECODE_BAUD +#endif + +#ifdef DECODE_BAUD +#ifndef B7200 +#define B7200 B4800 +#endif + +#ifndef B14400 +#define B14400 B9600 +#endif + +#ifndef B19200 +# define B19200 B14400 +#endif + +#ifndef B28800 +#define B28800 B19200 +#endif + +#ifndef B38400 +# define B38400 B28800 +#endif + +#ifndef B57600 +#define B57600 B38400 +#endif + +#ifndef B76800 +#define B76800 B57600 +#endif + +#ifndef B115200 +#define B115200 B76800 +#endif + +#ifndef B230400 +#define B230400 B115200 +#endif + + +/* + * This code assumes that the values B0, B50, B75... + * are in ascending order. They do not have to be + * contiguous. + */ +struct termspeeds { + long speed; + long value; +} termspeeds[] = { + { 0, B0 }, { 50, B50 }, { 75, B75 }, + { 110, B110 }, { 134, B134 }, { 150, B150 }, + { 200, B200 }, { 300, B300 }, { 600, B600 }, + { 1200, B1200 }, { 1800, B1800 }, { 2400, B2400 }, + { 4800, B4800 }, { 7200, B7200 }, { 9600, B9600 }, + { 14400, B14400 }, { 19200, B19200 }, { 28800, B28800 }, + { 38400, B38400 }, { 57600, B57600 }, { 115200, B115200 }, + { 230400, B230400 }, { -1, B230400 } +}; +#endif /* DECODE_BAUD */ + + void +TerminalSpeeds(ispeed, ospeed) + long *ispeed; + long *ospeed; +{ +#ifdef DECODE_BAUD + register struct termspeeds *tp; +#endif /* DECODE_BAUD */ + register long in, out; + + out = cfgetospeed(&old_tc); + in = cfgetispeed(&old_tc); + if (in == 0) + in = out; + +#ifdef DECODE_BAUD + tp = termspeeds; + while ((tp->speed != -1) && (tp->value < in)) + tp++; + *ispeed = tp->speed; + + tp = termspeeds; + while ((tp->speed != -1) && (tp->value < out)) + tp++; + *ospeed = tp->speed; +#else /* DECODE_BAUD */ + *ispeed = in; + *ospeed = out; +#endif /* DECODE_BAUD */ +} + + int +TerminalWindowSize(rows, cols) + long *rows, *cols; +{ +#ifdef TIOCGWINSZ + struct winsize ws; + + if (ioctl(fileno(stdin), TIOCGWINSZ, (char *)&ws) >= 0) { + *rows = ws.ws_row; + *cols = ws.ws_col; + return 1; + } +#endif /* TIOCGWINSZ */ + return 0; +} + + int +NetClose(fd) + int fd; +{ + return close(fd); +} + + + void +NetNonblockingIO(fd, onoff) + int fd; + int onoff; +{ + ioctl(fd, FIONBIO, (char *)&onoff); +} + +#if defined(TN3270) + void +NetSigIO(fd, onoff) + int fd; + int onoff; +{ + ioctl(fd, FIOASYNC, (char *)&onoff); /* hear about input */ +} + + void +NetSetPgrp(fd) + int fd; +{ + int myPid; + + myPid = getpid(); + fcntl(fd, F_SETOWN, myPid); +} +#endif /*defined(TN3270)*/ + +/* + * Various signal handling routines. + */ + + /* ARGSUSED */ + SIG_FUNC_RET +deadpeer(sig) + int sig; +{ + setcommandmode(); + longjmp(peerdied, -1); +} + + /* ARGSUSED */ + SIG_FUNC_RET +intr(sig) + int sig; +{ + if (localchars) { + intp(); + return; + } + setcommandmode(); + longjmp(toplevel, -1); +} + + /* ARGSUSED */ + SIG_FUNC_RET +intr2(sig) + int sig; +{ + if (localchars) { +#ifdef KLUDGELINEMODE + if (kludgelinemode) + sendbrk(); + else +#endif + sendabort(); + return; + } +} + +#ifdef SIGTSTP + /* ARGSUSED */ + SIG_FUNC_RET +susp(sig) + int sig; +{ + if ((rlogin != _POSIX_VDISABLE) && rlogin_susp()) + return; + if (localchars) + sendsusp(); +} +#endif + +#ifdef SIGWINCH + /* ARGSUSED */ + SIG_FUNC_RET +sendwin(sig) + int sig; +{ + if (connected) { + sendnaws(); + } +} +#endif + +#ifdef SIGINFO + /* ARGSUSED */ + SIG_FUNC_RET +ayt(sig) + int sig; +{ + if (connected) + sendayt(); + else + ayt_status(); +} +#endif + + + void +sys_telnet_init() +{ + (void) signal(SIGINT, intr); + (void) signal(SIGQUIT, intr2); + (void) signal(SIGPIPE, deadpeer); +#ifdef SIGWINCH + (void) signal(SIGWINCH, sendwin); +#endif +#ifdef SIGTSTP + (void) signal(SIGTSTP, susp); +#endif +#ifdef SIGINFO + (void) signal(SIGINFO, ayt); +#endif + + setconnmode(0); + + NetNonblockingIO(net, 1); + +#if defined(TN3270) + if (noasynchnet == 0) { /* DBX can't handle! */ + NetSigIO(net, 1); + NetSetPgrp(net); + } +#endif /* defined(TN3270) */ + +#if defined(SO_OOBINLINE) + if (SetSockOpt(net, SOL_SOCKET, SO_OOBINLINE, 1) == -1) { + perror("SetSockOpt"); + } +#endif /* defined(SO_OOBINLINE) */ +} + +/* + * Process rings - + * + * This routine tries to fill up/empty our various rings. + * + * The parameter specifies whether this is a poll operation, + * or a block-until-something-happens operation. + * + * The return value is 1 if something happened, 0 if not. + */ + + int +process_rings(netin, netout, netex, ttyin, ttyout, poll) + int poll; /* If 0, then block until something to do */ +{ + register int c; + /* One wants to be a bit careful about setting returnValue + * to one, since a one implies we did some useful work, + * and therefore probably won't be called to block next + * time (TN3270 mode only). + */ + int returnValue = 0; + static struct timeval TimeValue = { 0 }; + + if (netout) { + FD_SET(net, &obits); + } + if (ttyout) { + FD_SET(tout, &obits); + } +#if defined(TN3270) + if (ttyin) { + FD_SET(tin, &ibits); + } +#else /* defined(TN3270) */ + if (ttyin) { + FD_SET(tin, &ibits); + } +#endif /* defined(TN3270) */ +#if defined(TN3270) + if (netin) { + FD_SET(net, &ibits); + } +# else /* !defined(TN3270) */ + if (netin) { + FD_SET(net, &ibits); + } +# endif /* !defined(TN3270) */ + if (netex) { + FD_SET(net, &xbits); + } + if ((c = select(16, &ibits, &obits, &xbits, + (poll == 0)? (struct timeval *)0 : &TimeValue)) < 0) { + if (c == -1) { + /* + * we can get EINTR if we are in line mode, + * and the user does an escape (TSTP), or + * some other signal generator. + */ + if (errno == EINTR) { + return 0; + } +# if defined(TN3270) + /* + * we can get EBADF if we were in transparent + * mode, and the transcom process died. + */ + if (errno == EBADF) { + /* + * zero the bits (even though kernel does it) + * to make sure we are selecting on the right + * ones. + */ + FD_ZERO(&ibits); + FD_ZERO(&obits); + FD_ZERO(&xbits); + return 0; + } +# endif /* defined(TN3270) */ + /* I don't like this, does it ever happen? */ + printf("sleep(5) from telnet, after select\r\n"); + sleep(5); + } + return 0; + } + + /* + * Any urgent data? + */ + if (FD_ISSET(net, &xbits)) { + FD_CLR(net, &xbits); + SYNCHing = 1; + (void) ttyflush(1); /* flush already enqueued data */ + } + + /* + * Something to read from the network... + */ + if (FD_ISSET(net, &ibits)) { + int canread; + + FD_CLR(net, &ibits); + canread = ring_empty_consecutive(&netiring); +#if !defined(SO_OOBINLINE) + /* + * In 4.2 (and some early 4.3) systems, the + * OOB indication and data handling in the kernel + * is such that if two separate TCP Urgent requests + * come in, one byte of TCP data will be overlaid. + * This is fatal for Telnet, but we try to live + * with it. + * + * In addition, in 4.2 (and...), a special protocol + * is needed to pick up the TCP Urgent data in + * the correct sequence. + * + * What we do is: if we think we are in urgent + * mode, we look to see if we are "at the mark". + * If we are, we do an OOB receive. If we run + * this twice, we will do the OOB receive twice, + * but the second will fail, since the second + * time we were "at the mark", but there wasn't + * any data there (the kernel doesn't reset + * "at the mark" until we do a normal read). + * Once we've read the OOB data, we go ahead + * and do normal reads. + * + * There is also another problem, which is that + * since the OOB byte we read doesn't put us + * out of OOB state, and since that byte is most + * likely the TELNET DM (data mark), we would + * stay in the TELNET SYNCH (SYNCHing) state. + * So, clocks to the rescue. If we've "just" + * received a DM, then we test for the + * presence of OOB data when the receive OOB + * fails (and AFTER we did the normal mode read + * to clear "at the mark"). + */ + if (SYNCHing) { + int atmark; + static int bogus_oob = 0, first = 1; + + ioctl(net, SIOCATMARK, (char *)&atmark); + if (atmark) { + c = recv(net, netiring.supply, canread, MSG_OOB); + if ((c == -1) && (errno == EINVAL)) { + c = recv(net, netiring.supply, canread, 0); + if (clocks.didnetreceive < clocks.gotDM) { + SYNCHing = stilloob(net); + } + } else if (first && c > 0) { + /* + * Bogosity check. Systems based on 4.2BSD + * do not return an error if you do a second + * recv(MSG_OOB). So, we do one. If it + * succeeds and returns exactly the same + * data, then assume that we are running + * on a broken system and set the bogus_oob + * flag. (If the data was different, then + * we probably got some valid new data, so + * increment the count...) + */ + int i; + i = recv(net, netiring.supply + c, canread - c, MSG_OOB); + if (i == c && + memcmp(netiring.supply, netiring.supply + c, i) == 0) { + bogus_oob = 1; + first = 0; + } else if (i < 0) { + bogus_oob = 0; + first = 0; + } else + c += i; + } + if (bogus_oob && c > 0) { + int i; + /* + * Bogosity. We have to do the read + * to clear the atmark to get out of + * an infinate loop. + */ + i = read(net, netiring.supply + c, canread - c); + if (i > 0) + c += i; + } + } else { + c = recv(net, netiring.supply, canread, 0); + } + } else { + c = recv(net, netiring.supply, canread, 0); + } + settimer(didnetreceive); +#else /* !defined(SO_OOBINLINE) */ + c = recv(net, (char *)netiring.supply, canread, 0); +#endif /* !defined(SO_OOBINLINE) */ + if (c < 0 && errno == EWOULDBLOCK) { + c = 0; + } else if (c <= 0) { + return -1; + } + if (netdata) { + Dump('<', netiring.supply, c); + } + if (c) + ring_supplied(&netiring, c); + returnValue = 1; + } + + /* + * Something to read from the tty... + */ + if (FD_ISSET(tin, &ibits)) { + FD_CLR(tin, &ibits); + c = TerminalRead(ttyiring.supply, ring_empty_consecutive(&ttyiring)); + if (c < 0 && errno == EIO) + c = 0; + if (c < 0 && errno == EWOULDBLOCK) { + c = 0; + } else { + /* EOF detection for line mode!!!! */ + if ((c == 0) && MODE_LOCAL_CHARS(globalmode) && isatty(tin)) { + /* must be an EOF... */ + *ttyiring.supply = termEofChar; + c = 1; + } + if (c <= 0) { + return -1; + } + if (termdata) { + Dump('<', ttyiring.supply, c); + } + ring_supplied(&ttyiring, c); + } + returnValue = 1; /* did something useful */ + } + + if (FD_ISSET(net, &obits)) { + FD_CLR(net, &obits); + returnValue |= netflush(); + } + if (FD_ISSET(tout, &obits)) { + FD_CLR(tout, &obits); + returnValue |= (ttyflush(SYNCHing|flushout) > 0); + } + + return returnValue; +} diff --git a/telnet/telnet.1 b/telnet/telnet.1 new file mode 100644 index 0000000..b996fea --- /dev/null +++ b/telnet/telnet.1 @@ -0,0 +1,1366 @@ +.\" Copyright (c) 1983, 1990, 1993 +.\" The Regents of the University of California. All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" 3. All advertising materials mentioning features or use of this software +.\" must display the following acknowledgement: +.\" This product includes software developed by the University of +.\" California, Berkeley and its contributors. +.\" 4. Neither the name of the University nor the names of its contributors +.\" may be used to endorse or promote products derived from this software +.\" without specific prior written permission. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND +.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE +.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +.\" SUCH DAMAGE. +.\" +.\" @(#)telnet.1 8.6 (Berkeley) 6/1/94 +.\" +.Dd June 1, 1994 +.Dt TELNET 1 +.Os BSD 4.2 +.Sh NAME +.Nm telnet +.Nd user interface to the +.Tn TELNET +protocol +.Sh SYNOPSIS +.Nm telnet +.Op Fl 8EFKLacdfrx +.Op Fl S Ar tos +.Op Fl X Ar authtype +.Op Fl e Ar escapechar +.Op Fl k Ar realm +.Op Fl l Ar user +.Op Fl n Ar tracefile +.Oo +.Ar host +.Op port +.Oc +.Sh DESCRIPTION +The +.Nm telnet +command +is used to communicate with another host using the +.Tn TELNET +protocol. +If +.Nm telnet +is invoked without the +.Ar host +argument, it enters command mode, +indicated by its prompt +.Pq Nm telnet\&> . +In this mode, it accepts and executes the commands listed below. +If it is invoked with arguments, it performs an +.Ic open +command with those arguments. +.Pp +Options: +.Bl -tag -width indent +.It Fl 8 +Specifies an 8-bit data path. This causes an attempt to +negotiate the +.Dv TELNET BINARY +option on both input and output. +.It Fl E +Stops any character from being recognized as an escape character. +.It Fl F +If Kerberos V5 authentication is being used, the +.Fl F +option allows the local credentials to be forwarded +to the remote system, including any credentials that +have already been forwarded into the local environment. +.It Fl K +Specifies no automatic login to the remote system. +.It Fl L +Specifies an 8-bit data path on output. This causes the +BINARY option to be negotiated on output. +.It Fl S Ar tos +Sets the IP type-of-service (TOS) option for the telnet +connection to the value +.Ar tos, +which can be a numeric TOS value +or, on systems that support it, a symbolic +TOS name found in the /etc/iptos file. +.It Fl X Ar atype +Disables the +.Ar atype +type of authentication. +.It Fl a +Attempt automatic login. +Currently, this sends the user name via the +.Ev USER +variable +of the +.Ev ENVIRON +option if supported by the remote system. +The name used is that of the current user as returned by +.Xr getlogin 2 +if it agrees with the current user ID, +otherwise it is the name associated with the user ID. +.It Fl c +Disables the reading of the user's +.Pa \&.telnetrc +file. (See the +.Ic toggle skiprc +command on this man page.) +.It Fl d +Sets the initial value of the +.Ic debug +toggle to +.Dv TRUE +.It Fl e Ar escape char +Sets the initial +.Nm +.Nm telnet +escape character to +.Ar escape char. +If +.Ar escape char +is omitted, then +there will be no escape character. +.It Fl f +If Kerberos V5 authentication is being used, the +.Fl f +option allows the local credentials to be forwarded to the remote system. +.ne 1i +.It Fl k Ar realm +If Kerberos authentication is being used, the +.Fl k +option requests that telnet obtain tickets for the remote host in +realm realm instead of the remote host's realm, as determined +by +.Xr krb_realmofhost 3 . +.It Fl l Ar user +When connecting to the remote system, if the remote system +understands the +.Ev ENVIRON +option, then +.Ar user +will be sent to the remote system as the value for the variable USER. +This option implies the +.Fl a +option. +This option may also be used with the +.Ic open +command. +.It Fl n Ar tracefile +Opens +.Ar tracefile +for recording trace information. +See the +.Ic set tracefile +command below. +.It Fl r +Specifies a user interface similar to +.Xr rlogin 1 . +In this +mode, the escape character is set to the tilde (~) character, +unless modified by the -e option. +.It Fl x +Turns on encryption of the data stream if possible. This +option is not available outside of the United States and +Canada. +.It Ar host +Indicates the official name, an alias, or the Internet address +of a remote host. +.It Ar port +Indicates a port number (address of an application). If a number is +not specified, the default +.Nm telnet +port is used. +.El +.Pp +When in rlogin mode, a line of the form ~. disconnects from the +remote host; ~ is the telnet escape character. +Similarly, the line ~^Z suspends the telnet session. +The line ~^] escapes to the normal telnet escape prompt. +.Pp +Once a connection has been opened, +.Nm telnet +will attempt to enable the +.Dv TELNET LINEMODE +option. +If this fails, then +.Nm telnet +will revert to one of two input modes: +either \*(Lqcharacter at a time\*(Rq +or \*(Lqold line by line\*(Rq +depending on what the remote system supports. +.Pp +When +.Dv LINEMODE +is enabled, character processing is done on the +local system, under the control of the remote system. When input +editing or character echoing is to be disabled, the remote system +will relay that information. The remote system will also relay +changes to any special characters that happen on the remote +system, so that they can take effect on the local system. +.Pp +In \*(Lqcharacter at a time\*(Rq mode, most +text typed is immediately sent to the remote host for processing. +.Pp +In \*(Lqold line by line\*(Rq mode, all text is echoed locally, +and (normally) only completed lines are sent to the remote host. +The \*(Lqlocal echo character\*(Rq (initially \*(Lq^E\*(Rq) may be used +to turn off and on the local echo +(this would mostly be used to enter passwords +without the password being echoed). +.Pp +If the +.Dv LINEMODE +option is enabled, or if the +.Ic localchars +toggle is +.Dv TRUE +(the default for \*(Lqold line by line\*(Lq; see below), +the user's +.Ic quit , +.Ic intr , +and +.Ic flush +characters are trapped locally, and sent as +.Tn TELNET +protocol sequences to the remote side. +If +.Dv LINEMODE +has ever been enabled, then the user's +.Ic susp +and +.Ic eof +are also sent as +.Tn TELNET +protocol sequences, +and +.Ic quit +is sent as a +.Dv TELNET ABORT +instead of +.Dv BREAK +There are options (see +.Ic toggle +.Ic autoflush +and +.Ic toggle +.Ic autosynch +below) +which cause this action to flush subsequent output to the terminal +(until the remote host acknowledges the +.Tn TELNET +sequence) and flush previous terminal input +(in the case of +.Ic quit +and +.Ic intr ) . +.Pp +While connected to a remote host, +.Nm telnet +command mode may be entered by typing the +.Nm telnet +\*(Lqescape character\*(Rq (initially \*(Lq^]\*(Rq). +When in command mode, the normal terminal editing conventions are available. +.Pp +The following +.Nm telnet +commands are available. +Only enough of each command to uniquely identify it need be typed +(this is also true for arguments to the +.Ic mode , +.Ic set , +.Ic toggle , +.Ic unset , +.Ic slc , +.Ic environ , +and +.Ic display +commands). +.Pp +.Bl -tag -width "mode type" +.It Ic auth Ar argument ... +The auth command manipulates the information sent through the +.Dv TELNET AUTHENTICATE +option. Valid arguments for the +auth command are as follows: +.Bl -tag -width "disable type" +.It Ic disable Ar type +Disables the specified type of authentication. To +obtain a list of available types, use the +.Ic auth disable \&? +command. +.It Ic enable Ar type +Enables the specified type of authentication. To +obtain a list of available types, use the +.Ic auth enable \&? +command. +.It Ic status +Lists the current status of the various types of +authentication. +.El +.It Ic close +Close a +.Tn TELNET +session and return to command mode. +.It Ic display Ar argument ... +Displays all, or some, of the +.Ic set +and +.Ic toggle +values (see below). +.It Ic encrypt Ar argument ... +The encrypt command manipulates the information sent through the +.Dv TELNET ENCRYPT +option. +.Pp +Note: Because of export controls, the +.Dv TELNET ENCRYPT +option is not supported outside of the United States and Canada. +.Pp +Valid arguments for the encrypt command are as follows: +.Bl -tag -width Ar +.It Ic disable Ar type Ic [input|output] +Disables the specified type of encryption. If you +omit the input and output, both input and output +are disabled. To obtain a list of available +types, use the +.Ic encrypt disable \&? +command. +.It Ic enable Ar type Ic [input|output] +Enables the specified type of encryption. If you +omit input and output, both input and output are +enabled. To obtain a list of available types, use the +.Ic encrypt enable \&? +command. +.It Ic input +This is the same as the +.Ic encrypt start input +command. +.It Ic -input +This is the same as the +.Ic encrypt stop input +command. +.It Ic output +This is the same as the +.Ic encrypt start output +command. +.It Ic -output +This is the same as the +.Ic encrypt stop output +command. +.It Ic start Ic [input|output] +Attempts to start encryption. If you omit +.Ic input +and +.Ic output, +both input and output are enabled. To +obtain a list of available types, use the +.Ic encrypt enable \&? +command. +.It Ic status +Lists the current status of encryption. +.It Ic stop Ic [input|output] +Stops encryption. If you omit input and output, +encryption is on both input and output. +.It Ic type Ar type +Sets the default type of encryption to be used +with later +.Ic encrypt start +or +.Ic encrypt stop +commands. +.El +.It Ic environ Ar arguments... +The +.Ic environ +command is used to manipulate the +the variables that my be sent through the +.Dv TELNET ENVIRON +option. +The initial set of variables is taken from the users +environment, with only the +.Ev DISPLAY +and +.Ev PRINTER +variables being exported by default. +The +.Ev USER +variable is also exported if the +.Fl a +or +.Fl l +options are used. +.br +Valid arguments for the +.Ic environ +command are: +.Bl -tag -width Fl +.It Ic define Ar variable value +Define the variable +.Ar variable +to have a value of +.Ar value. +Any variables defined by this command are automatically exported. +The +.Ar value +may be enclosed in single or double quotes so +that tabs and spaces may be included. +.It Ic undefine Ar variable +Remove +.Ar variable +from the list of environment variables. +.It Ic export Ar variable +Mark the variable +.Ar variable +to be exported to the remote side. +.It Ic unexport Ar variable +Mark the variable +.Ar variable +to not be exported unless +explicitly asked for by the remote side. +.It Ic list +List the current set of environment variables. +Those marked with a +.Cm * +will be sent automatically, +other variables will only be sent if explicitly requested. +.It Ic \&? +Prints out help information for the +.Ic environ +command. +.El +.It Ic logout +Sends the +.Dv TELNET LOGOUT +option to the remote side. +This command is similar to a +.Ic close +command; however, if the remote side does not support the +.Dv LOGOUT +option, nothing happens. +If, however, the remote side does support the +.Dv LOGOUT +option, this command should cause the remote side to close the +.Tn TELNET +connection. +If the remote side also supports the concept of +suspending a user's session for later reattachment, +the logout argument indicates that you +should terminate the session immediately. +.It Ic mode Ar type +.Ar Type +is one of several options, depending on the state of the +.Tn TELNET +session. +The remote host is asked for permission to go into the requested mode. +If the remote host is capable of entering that mode, the requested +mode will be entered. +.Bl -tag -width Ar +.It Ic character +Disable the +.Dv TELNET LINEMODE +option, or, if the remote side does not understand the +.Dv LINEMODE +option, then enter \*(Lqcharacter at a time\*(Lq mode. +.It Ic line +Enable the +.Dv TELNET LINEMODE +option, or, if the remote side does not understand the +.Dv LINEMODE +option, then attempt to enter \*(Lqold-line-by-line\*(Lq mode. +.It Ic isig Pq Ic \-isig +Attempt to enable (disable) the +.Dv TRAPSIG +mode of the +.Dv LINEMODE +option. +This requires that the +.Dv LINEMODE +option be enabled. +.It Ic edit Pq Ic \-edit +Attempt to enable (disable) the +.Dv EDIT +mode of the +.Dv LINEMODE +option. +This requires that the +.Dv LINEMODE +option be enabled. +.It Ic softtabs Pq Ic \-softtabs +Attempt to enable (disable) the +.Dv SOFT_TAB +mode of the +.Dv LINEMODE +option. +This requires that the +.Dv LINEMODE +option be enabled. +.ne 1i +.It Ic litecho Pq Ic \-litecho +Attempt to enable (disable) the +.Dv LIT_ECHO +mode of the +.Dv LINEMODE +option. +This requires that the +.Dv LINEMODE +option be enabled. +.It Ic \&? +Prints out help information for the +.Ic mode +command. +.El +.It Xo +.Ic open Ar host +.Oo Op Fl l +.Ar user +.Oc Ns Oo Fl +.Ar port Oc +.Xc +Open a connection to the named host. +If no port number +is specified, +.Nm telnet +will attempt to contact a +.Tn TELNET +server at the default port. +The host specification may be either a host name (see +.Xr hosts 5 ) +or an Internet address specified in the \*(Lqdot notation\*(Rq (see +.Xr inet 3 ) . +The +.Op Fl l +option may be used to specify the user name +to be passed to the remote system via the +.Ev ENVIRON +option. +When connecting to a non-standard port, +.Nm telnet +omits any automatic initiation of +.Tn TELNET +options. When the port number is preceded by a minus sign, +the initial option negotiation is done. +After establishing a connection, the file +.Pa \&.telnetrc +in the +users home directory is opened. Lines beginning with a # are +comment lines. Blank lines are ignored. Lines that begin +without white space are the start of a machine entry. The +first thing on the line is the name of the machine that is +being connected to. The rest of the line, and successive +lines that begin with white space are assumed to be +.Nm telnet +commands and are processed as if they had been typed +in manually to the +.Nm telnet +command prompt. +.It Ic quit +Close any open +.Tn TELNET +session and exit +.Nm telnet . +An end of file (in command mode) will also close a session and exit. +.It Ic send Ar arguments +Sends one or more special character sequences to the remote host. +The following are the arguments which may be specified +(more than one argument may be specified at a time): +.Pp +.Bl -tag -width escape +.It Ic abort +Sends the +.Dv TELNET ABORT +(Abort +processes) +sequence. +.It Ic ao +Sends the +.Dv TELNET AO +(Abort Output) sequence, which should cause the remote system to flush +all output +.Em from +the remote system +.Em to +the user's terminal. +.It Ic ayt +Sends the +.Dv TELNET AYT +(Are You There) +sequence, to which the remote system may or may not choose to respond. +.It Ic brk +Sends the +.Dv TELNET BRK +(Break) sequence, which may have significance to the remote +system. +.It Ic ec +Sends the +.Dv TELNET EC +(Erase Character) +sequence, which should cause the remote system to erase the last character +entered. +.It Ic el +Sends the +.Dv TELNET EL +(Erase Line) +sequence, which should cause the remote system to erase the line currently +being entered. +.It Ic eof +Sends the +.Dv TELNET EOF +(End Of File) +sequence. +.It Ic eor +Sends the +.Dv TELNET EOR +(End of Record) +sequence. +.It Ic escape +Sends the current +.Nm telnet +escape character (initially \*(Lq^\*(Rq). +.It Ic ga +Sends the +.Dv TELNET GA +(Go Ahead) +sequence, which likely has no significance to the remote system. +.It Ic getstatus +If the remote side supports the +.Dv TELNET STATUS +command, +.Ic getstatus +will send the subnegotiation to request that the server send +its current option status. +.ne 1i +.It Ic ip +Sends the +.Dv TELNET IP +(Interrupt Process) sequence, which should cause the remote +system to abort the currently running process. +.It Ic nop +Sends the +.Dv TELNET NOP +(No OPeration) +sequence. +.It Ic susp +Sends the +.Dv TELNET SUSP +(SUSPend process) +sequence. +.It Ic synch +Sends the +.Dv TELNET SYNCH +sequence. +This sequence causes the remote system to discard all previously typed +(but not yet read) input. +This sequence is sent as +.Tn TCP +urgent +data (and may not work if the remote system is a +.Bx 4.2 +system -- if +it doesn't work, a lower case \*(Lqr\*(Rq may be echoed on the terminal). +.It Ic do Ar cmd +.It Ic dont Ar cmd +.It Ic will Ar cmd +.It Ic wont Ar cmd +Sends the +.Dv TELNET DO +.Ar cmd +sequence. +.Ar Cmd +can be either a decimal number between 0 and 255, +or a symbolic name for a specific +.Dv TELNET +command. +.Ar Cmd +can also be either +.Ic help +or +.Ic \&? +to print out help information, including +a list of known symbolic names. +.It Ic \&? +Prints out help information for the +.Ic send +command. +.El +.It Ic set Ar argument value +.It Ic unset Ar argument value +The +.Ic set +command will set any one of a number of +.Nm telnet +variables to a specific value or to +.Dv TRUE . +The special value +.Ic off +turns off the function associated with +the variable, this is equivalent to using the +.Ic unset +command. +The +.Ic unset +command will disable or set to +.Dv FALSE +any of the specified functions. +The values of variables may be interrogated with the +.Ic display +command. +The variables which may be set or unset, but not toggled, are +listed here. In addition, any of the variables for the +.Ic toggle +command may be explicitly set or unset using +the +.Ic set +and +.Ic unset +commands. +.Bl -tag -width escape +.It Ic ayt +If +.Tn TELNET +is in localchars mode, or +.Dv LINEMODE +is enabled, and the status character is typed, a +.Dv TELNET AYT +sequence (see +.Ic send ayt +preceding) is sent to the +remote host. The initial value for the "Are You There" +character is the terminal's status character. +.It Ic echo +This is the value (initially \*(Lq^E\*(Rq) which, when in +\*(Lqline by line\*(Rq mode, toggles between doing local echoing +of entered characters (for normal processing), and suppressing +echoing of entered characters (for entering, say, a password). +.It Ic eof +If +.Nm telnet +is operating in +.Dv LINEMODE +or \*(Lqold line by line\*(Rq mode, entering this character +as the first character on a line will cause this character to be +sent to the remote system. +The initial value of the eof character is taken to be the terminal's +.Ic eof +character. +.It Ic erase +If +.Nm telnet +is in +.Ic localchars +mode (see +.Ic toggle +.Ic localchars +below), +.Sy and +if +.Nm telnet +is operating in \*(Lqcharacter at a time\*(Rq mode, then when this +character is typed, a +.Dv TELNET EC +sequence (see +.Ic send +.Ic ec +above) +is sent to the remote system. +The initial value for the erase character is taken to be +the terminal's +.Ic erase +character. +.It Ic escape +This is the +.Nm telnet +escape character (initially \*(Lq^[\*(Rq) which causes entry +into +.Nm telnet +command mode (when connected to a remote system). +.It Ic flushoutput +If +.Nm telnet +is in +.Ic localchars +mode (see +.Ic toggle +.Ic localchars +below) +and the +.Ic flushoutput +character is typed, a +.Dv TELNET AO +sequence (see +.Ic send +.Ic ao +above) +is sent to the remote host. +The initial value for the flush character is taken to be +the terminal's +.Ic flush +character. +.It Ic forw1 +.It Ic forw2 +If +.Tn TELNET +is operating in +.Dv LINEMODE , +these are the +characters that, when typed, cause partial lines to be +forwarded to the remote system. The initial value for +the forwarding characters are taken from the terminal's +eol and eol2 characters. +.It Ic interrupt +If +.Nm telnet +is in +.Ic localchars +mode (see +.Ic toggle +.Ic localchars +below) +and the +.Ic interrupt +character is typed, a +.Dv TELNET IP +sequence (see +.Ic send +.Ic ip +above) +is sent to the remote host. +The initial value for the interrupt character is taken to be +the terminal's +.Ic intr +character. +.It Ic kill +If +.Nm telnet +is in +.Ic localchars +mode (see +.Ic toggle +.Ic localchars +below), +.Ic and +if +.Nm telnet +is operating in \*(Lqcharacter at a time\*(Rq mode, then when this +character is typed, a +.Dv TELNET EL +sequence (see +.Ic send +.Ic el +above) +is sent to the remote system. +The initial value for the kill character is taken to be +the terminal's +.Ic kill +character. +.It Ic lnext +If +.Nm telnet +is operating in +.Dv LINEMODE +or \*(Lqold line by line\*(Lq mode, then this character is taken to +be the terminal's +.Ic lnext +character. +The initial value for the lnext character is taken to be +the terminal's +.Ic lnext +character. +.It Ic quit +If +.Nm telnet +is in +.Ic localchars +mode (see +.Ic toggle +.Ic localchars +below) +and the +.Ic quit +character is typed, a +.Dv TELNET BRK +sequence (see +.Ic send +.Ic brk +above) +is sent to the remote host. +The initial value for the quit character is taken to be +the terminal's +.Ic quit +character. +.It Ic reprint +If +.Nm telnet +is operating in +.Dv LINEMODE +or \*(Lqold line by line\*(Lq mode, then this character is taken to +be the terminal's +.Ic reprint +character. +The initial value for the reprint character is taken to be +the terminal's +.Ic reprint +character. +.It Ic rlogin +This is the rlogin escape character. +If set, the normal +.Tn TELNET +escape character is ignored unless it is +preceded by this character at the beginning of a line. +This character, at the beginning of a line followed by +a "." closes the connection; when followed by a ^Z it +suspends the telnet command. The initial state is to +disable the rlogin escape character. +.It Ic start +If the +.Dv TELNET TOGGLE-FLOW-CONTROL +option has been enabled, +then this character is taken to +be the terminal's +.Ic start +character. +The initial value for the kill character is taken to be +the terminal's +.Ic start +character. +.It Ic stop +If the +.Dv TELNET TOGGLE-FLOW-CONTROL +option has been enabled, +then this character is taken to +be the terminal's +.Ic stop +character. +The initial value for the kill character is taken to be +the terminal's +.Ic stop +character. +.It Ic susp +If +.Nm telnet +is in +.Ic localchars +mode, or +.Dv LINEMODE +is enabled, and the +.Ic suspend +character is typed, a +.Dv TELNET SUSP +sequence (see +.Ic send +.Ic susp +above) +is sent to the remote host. +The initial value for the suspend character is taken to be +the terminal's +.Ic suspend +character. +.ne 1i +.It Ic tracefile +This is the file to which the output, caused by +.Ic netdata +or +.Ic option +tracing being +.Dv TRUE , +will be written. If it is set to +.Dq Fl , +then tracing information will be written to standard output (the default). +.It Ic worderase +If +.Nm telnet +is operating in +.Dv LINEMODE +or \*(Lqold line by line\*(Lq mode, then this character is taken to +be the terminal's +.Ic worderase +character. +The initial value for the worderase character is taken to be +the terminal's +.Ic worderase +character. +.It Ic \&? +Displays the legal +.Ic set +.Pq Ic unset +commands. +.El +.It Ic slc Ar state +The +.Ic slc +command (Set Local Characters) is used to set +or change the state of the the special +characters when the +.Dv TELNET LINEMODE +option has +been enabled. Special characters are characters that get +mapped to +.Tn TELNET +commands sequences (like +.Ic ip +or +.Ic quit ) +or line editing characters (like +.Ic erase +and +.Ic kill ) . +By default, the local special characters are exported. +.Bl -tag -width Fl +.It Ic check +Verify the current settings for the current special characters. +The remote side is requested to send all the current special +character settings, and if there are any discrepancies with +the local side, the local side will switch to the remote value. +.It Ic export +Switch to the local defaults for the special characters. The +local default characters are those of the local terminal at +the time when +.Nm telnet +was started. +.It Ic import +Switch to the remote defaults for the special characters. +The remote default characters are those of the remote system +at the time when the +.Tn TELNET +connection was established. +.It Ic \&? +Prints out help information for the +.Ic slc +command. +.El +.It Ic status +Show the current status of +.Nm telnet . +This includes the peer one is connected to, as well +as the current mode. +.It Ic toggle Ar arguments ... +Toggle (between +.Dv TRUE +and +.Dv FALSE ) +various flags that control how +.Nm telnet +responds to events. +These flags may be set explicitly to +.Dv TRUE +or +.Dv FALSE +using the +.Ic set +and +.Ic unset +commands listed above. +More than one argument may be specified. +The state of these flags may be interrogated with the +.Ic display +command. +Valid arguments are: +.Bl -tag -width Ar +.It Ic authdebug +Turns on debugging information for the authentication code. +.It Ic autoflush +If +.Ic autoflush +and +.Ic localchars +are both +.Dv TRUE , +then when the +.Ic ao , +or +.Ic quit +characters are recognized (and transformed into +.Tn TELNET +sequences; see +.Ic set +above for details), +.Nm telnet +refuses to display any data on the user's terminal +until the remote system acknowledges (via a +.Dv TELNET TIMING MARK +option) +that it has processed those +.Tn TELNET +sequences. +The initial value for this toggle is +.Dv TRUE +if the terminal user had not +done an "stty noflsh", otherwise +.Dv FALSE +(see +.Xr stty 1 ) . +.It Ic autodecrypt +When the +.Dv TELNET ENCRYPT +option is negotiated, by +default the actual encryption (decryption) of the data +stream does not start automatically. The autoencrypt +(autodecrypt) command states that encryption of the +output (input) stream should be enabled as soon as +possible. +.sp +.Pp +Note: Because of export controls, the +.Dv TELNET ENCRYPT +option is not supported outside the United States and Canada. +.It Ic autologin +If the remote side supports the +.Dv TELNET AUTHENTICATION +option +.Tn TELNET +attempts to use it to perform automatic authentication. If the +.Dv AUTHENTICATION +option is not supported, the user's login +name are propagated through the +.Dv TELNET ENVIRON +option. +This command is the same as specifying +.Ar a +option on the +.Ic open +command. +.It Ic autosynch +If +.Ic autosynch +and +.Ic localchars +are both +.Dv TRUE , +then when either the +.Ic intr +or +.Ic quit +characters is typed (see +.Ic set +above for descriptions of the +.Ic intr +and +.Ic quit +characters), the resulting +.Tn TELNET +sequence sent is followed by the +.Dv TELNET SYNCH +sequence. +This procedure +.Ic should +cause the remote system to begin throwing away all previously +typed input until both of the +.Tn TELNET +sequences have been read and acted upon. +The initial value of this toggle is +.Dv FALSE . +.It Ic binary +Enable or disable the +.Dv TELNET BINARY +option on both input and output. +.It Ic inbinary +Enable or disable the +.Dv TELNET BINARY +option on input. +.It Ic outbinary +Enable or disable the +.Dv TELNET BINARY +option on output. +.It Ic crlf +If this is +.Dv TRUE , +then carriage returns will be sent as +.Li . +If this is +.Dv FALSE , +then carriage returns will be send as +.Li . +The initial value for this toggle is +.Dv FALSE . +.It Ic crmod +Toggle carriage return mode. +When this mode is enabled, most carriage return characters received from +the remote host will be mapped into a carriage return followed by +a line feed. +This mode does not affect those characters typed by the user, only +those received from the remote host. +This mode is not very useful unless the remote host +only sends carriage return, but never line feed. +The initial value for this toggle is +.Dv FALSE . +.It Ic debug +Toggles socket level debugging (useful only to the +.Ic super user ) . +The initial value for this toggle is +.Dv FALSE . +.It Ic encdebug +Turns on debugging information for the encryption code. +.It Ic localchars +If this is +.Dv TRUE , +then the +.Ic flush , +.Ic interrupt , +.Ic quit , +.Ic erase , +and +.Ic kill +characters (see +.Ic set +above) are recognized locally, and transformed into (hopefully) appropriate +.Tn TELNET +control sequences +(respectively +.Ic ao , +.Ic ip , +.Ic brk , +.Ic ec , +and +.Ic el ; +see +.Ic send +above). +The initial value for this toggle is +.Dv TRUE +in \*(Lqold line by line\*(Rq mode, +and +.Dv FALSE +in \*(Lqcharacter at a time\*(Rq mode. +When the +.Dv LINEMODE +option is enabled, the value of +.Ic localchars +is ignored, and assumed to always be +.Dv TRUE . +If +.Dv LINEMODE +has ever been enabled, then +.Ic quit +is sent as +.Ic abort , +and +.Ic eof and +.B suspend +are sent as +.Ic eof and +.Ic susp , +see +.Ic send +above). +.It Ic netdata +Toggles the display of all network data (in hexadecimal format). +The initial value for this toggle is +.Dv FALSE . +.It Ic options +Toggles the display of some internal +.Nm telnet +protocol processing (having to do with +.Tn TELNET +options). +The initial value for this toggle is +.Dv FALSE . +.ne 1i +.It Ic prettydump +When the +.Ic netdata +toggle is enabled, if +.Ic prettydump +is enabled the output from the +.Ic netdata +command will be formatted in a more user readable format. +Spaces are put between each character in the output, and the +beginning of any +.Tn TELNET +escape sequence is preceded by a '*' to aid in locating them. +.It Ic skiprc +When the skiprc toggle is +.Dv TRUE , +.Tn TELNET +skips the reading of the +.Pa \&.telnetrc +file in the users home +directory when connections are opened. The initial +value for this toggle is +.Dv FALSE. +.It Ic termdata +Toggles the display of all terminal data (in hexadecimal format). +The initial value for this toggle is +.Dv FALSE . +.It Ic verbose_encrypt +When the +.Ic verbose_encrypt +toggle is +.Dv TRUE , +.Tn TELNET +prints out a message each time encryption is enabled or +disabled. The initial value for this toggle is +.Dv FALSE. +Note: Because of export controls, data encryption +is not supported outside of the United States and Canada. +.It Ic \&? +Displays the legal +.Ic toggle +commands. +.El +.It Ic z +Suspend +.Nm telnet . +This command only works when the user is using the +.Xr csh 1 . +.It Ic \&! Op Ar command +Execute a single command in a subshell on the local +system. If +.Ic command +is omitted, then an interactive +subshell is invoked. +.It Ic \&? Op Ar command +Get help. With no arguments, +.Nm telnet +prints a help summary. +If a command is specified, +.Nm telnet +will print the help information for just that command. +.El +.Sh ENVIRONMENT +.Nm Telnet +uses at least the +.Ev HOME , +.Ev SHELL , +.Ev DISPLAY , +and +.Ev TERM +environment variables. +Other environment variables may be propagated +to the other side via the +.Dv TELNET ENVIRON +option. +.Sh FILES +.Bl -tag -width ~/.telnetrc -compact +.It Pa ~/.telnetrc +user customized telnet startup values +.El +.Sh HISTORY +The +.Nm Telnet +command appeared in +.Bx 4.2 . +.Sh NOTES +.Pp +On some remote systems, echo has to be turned off manually when in +\*(Lqold line by line\*(Rq mode. +.Pp +In \*(Lqold line by line\*(Rq mode or +.Dv LINEMODE +the terminal's +.Ic eof +character is only recognized (and sent to the remote system) +when it is the first character on a line. diff --git a/telnet/telnet.c b/telnet/telnet.c new file mode 100644 index 0000000..e792262 --- /dev/null +++ b/telnet/telnet.c @@ -0,0 +1,2650 @@ +/* + * Copyright (c) 1988, 1990, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)telnet.c 8.4 (Berkeley) 5/30/95"; +#endif /* not lint */ + +#include + +#if defined(unix) +#include +/* By the way, we need to include curses.h before telnet.h since, + * among other things, telnet.h #defines 'DO', which is a variable + * declared in curses.h. + */ +#endif /* defined(unix) */ + +#include + +#include + +#include "ring.h" + +#include "defines.h" +#include "externs.h" +#include "types.h" +#include "general.h" + + +#define strip(x) ((my_want_state_is_wont(TELOPT_BINARY)) ? ((x)&0x7f) : (x)) + +static unsigned char subbuffer[SUBBUFSIZE], + *subpointer, *subend; /* buffer for sub-options */ +#define SB_CLEAR() subpointer = subbuffer; +#define SB_TERM() { subend = subpointer; SB_CLEAR(); } +#define SB_ACCUM(c) if (subpointer < (subbuffer+sizeof subbuffer)) { \ + *subpointer++ = (c); \ + } + +#define SB_GET() ((*subpointer++)&0xff) +#define SB_PEEK() ((*subpointer)&0xff) +#define SB_EOF() (subpointer >= subend) +#define SB_LEN() (subend - subpointer) + +char options[256]; /* The combined options */ +char do_dont_resp[256]; +char will_wont_resp[256]; + +int + eight = 0, + autologin = 0, /* Autologin anyone? */ + skiprc = 0, + connected, + showoptions, + In3270, /* Are we in 3270 mode? */ + ISend, /* trying to send network data in */ + debug = 0, + crmod, + netdata, /* Print out network data flow */ + crlf, /* Should '\r' be mapped to (or )? */ +#if defined(TN3270) + noasynchtty = 0,/* User specified "-noasynch" on command line */ + noasynchnet = 0,/* User specified "-noasynch" on command line */ + askedSGA = 0, /* We have talked about suppress go ahead */ +#endif /* defined(TN3270) */ + telnetport, + SYNCHing, /* we are in TELNET SYNCH mode */ + flushout, /* flush output */ + autoflush = 0, /* flush output when interrupting? */ + autosynch, /* send interrupt characters with SYNCH? */ + localflow, /* we handle flow control locally */ + restartany, /* if flow control enabled, restart on any character */ + localchars, /* we recognize interrupt/quit */ + donelclchars, /* the user has set "localchars" */ + donebinarytoggle, /* the user has put us in binary */ + dontlecho, /* do we suppress local echoing right now? */ + globalmode; + +char *prompt = 0; + +cc_t escape; +cc_t rlogin; +#ifdef KLUDGELINEMODE +cc_t echoc; +#endif + +/* + * Telnet receiver states for fsm + */ +#define TS_DATA 0 +#define TS_IAC 1 +#define TS_WILL 2 +#define TS_WONT 3 +#define TS_DO 4 +#define TS_DONT 5 +#define TS_CR 6 +#define TS_SB 7 /* sub-option collection */ +#define TS_SE 8 /* looking for sub-option end */ + +static int telrcv_state; +#ifdef OLD_ENVIRON +unsigned char telopt_environ = TELOPT_NEW_ENVIRON; +#else +# define telopt_environ TELOPT_NEW_ENVIRON +#endif + +jmp_buf toplevel = { 0 }; +jmp_buf peerdied; + +int flushline; +int linemode; + +#ifdef KLUDGELINEMODE +int kludgelinemode = 1; +#endif + +/* + * The following are some clocks used to decide how to interpret + * the relationship between various variables. + */ + +Clocks clocks; + +#ifdef notdef +Modelist modelist[] = { + { "telnet command mode", COMMAND_LINE }, + { "character-at-a-time mode", 0 }, + { "character-at-a-time mode (local echo)", LOCAL_ECHO|LOCAL_CHARS }, + { "line-by-line mode (remote echo)", LINE | LOCAL_CHARS }, + { "line-by-line mode", LINE | LOCAL_ECHO | LOCAL_CHARS }, + { "line-by-line mode (local echoing suppressed)", LINE | LOCAL_CHARS }, + { "3270 mode", 0 }, +}; +#endif + + +/* + * Initialize telnet environment. + */ + + void +init_telnet() +{ + env_init(); + + SB_CLEAR(); + ClearArray(options); + + connected = In3270 = ISend = localflow = donebinarytoggle = 0; +#if defined(AUTHENTICATION) || defined(ENCRYPTION) + auth_encrypt_connect(connected); +#endif /* defined(AUTHENTICATION) || defined(ENCRYPTION) */ + restartany = -1; + + SYNCHing = 0; + + /* Don't change NetTrace */ + + escape = CONTROL(']'); + rlogin = _POSIX_VDISABLE; +#ifdef KLUDGELINEMODE + echoc = CONTROL('E'); +#endif + + flushline = 1; + telrcv_state = TS_DATA; +} + + +#ifdef notdef +#include + + /*VARARGS*/ + static void +printring(va_alist) + va_dcl +{ + va_list ap; + char buffer[100]; /* where things go */ + char *ptr; + char *format; + char *string; + Ring *ring; + int i; + + va_start(ap); + + ring = va_arg(ap, Ring *); + format = va_arg(ap, char *); + ptr = buffer; + + while ((i = *format++) != 0) { + if (i == '%') { + i = *format++; + switch (i) { + case 'c': + *ptr++ = va_arg(ap, int); + break; + case 's': + string = va_arg(ap, char *); + ring_supply_data(ring, buffer, ptr-buffer); + ring_supply_data(ring, string, strlen(string)); + ptr = buffer; + break; + case 0: + ExitString("printring: trailing %%.\n", 1); + /*NOTREACHED*/ + default: + ExitString("printring: unknown format character.\n", 1); + /*NOTREACHED*/ + } + } else { + *ptr++ = i; + } + } + ring_supply_data(ring, buffer, ptr-buffer); +} +#endif + +/* + * These routines are in charge of sending option negotiations + * to the other side. + * + * The basic idea is that we send the negotiation if either side + * is in disagreement as to what the current state should be. + */ + + void +send_do(c, init) + register int c, init; +{ + if (init) { + if (((do_dont_resp[c] == 0) && my_state_is_do(c)) || + my_want_state_is_do(c)) + return; + set_my_want_state_do(c); + do_dont_resp[c]++; + } + NET2ADD(IAC, DO); + NETADD(c); + printoption("SENT", DO, c); +} + + void +send_dont(c, init) + register int c, init; +{ + if (init) { + if (((do_dont_resp[c] == 0) && my_state_is_dont(c)) || + my_want_state_is_dont(c)) + return; + set_my_want_state_dont(c); + do_dont_resp[c]++; + } + NET2ADD(IAC, DONT); + NETADD(c); + printoption("SENT", DONT, c); +} + + void +send_will(c, init) + register int c, init; +{ + if (init) { + if (((will_wont_resp[c] == 0) && my_state_is_will(c)) || + my_want_state_is_will(c)) + return; + set_my_want_state_will(c); + will_wont_resp[c]++; + } + NET2ADD(IAC, WILL); + NETADD(c); + printoption("SENT", WILL, c); +} + + void +send_wont(c, init) + register int c, init; +{ + if (init) { + if (((will_wont_resp[c] == 0) && my_state_is_wont(c)) || + my_want_state_is_wont(c)) + return; + set_my_want_state_wont(c); + will_wont_resp[c]++; + } + NET2ADD(IAC, WONT); + NETADD(c); + printoption("SENT", WONT, c); +} + + + void +willoption(option) + int option; +{ + int new_state_ok = 0; + + if (do_dont_resp[option]) { + --do_dont_resp[option]; + if (do_dont_resp[option] && my_state_is_do(option)) + --do_dont_resp[option]; + } + + if ((do_dont_resp[option] == 0) && my_want_state_is_dont(option)) { + + switch (option) { + + case TELOPT_ECHO: +# if defined(TN3270) + /* + * The following is a pain in the rear-end. + * Various IBM servers (some versions of Wiscnet, + * possibly Fibronics/Spartacus, and who knows who + * else) will NOT allow us to send "DO SGA" too early + * in the setup proceedings. On the other hand, + * 4.2 servers (telnetd) won't set SGA correctly. + * So, we are stuck. Empirically (but, based on + * a VERY small sample), the IBM servers don't send + * out anything about ECHO, so we postpone our sending + * "DO SGA" until we see "WILL ECHO" (which 4.2 servers + * DO send). + */ + { + if (askedSGA == 0) { + askedSGA = 1; + if (my_want_state_is_dont(TELOPT_SGA)) + send_do(TELOPT_SGA, 1); + } + } + /* Fall through */ + case TELOPT_EOR: +#endif /* defined(TN3270) */ + case TELOPT_BINARY: + case TELOPT_SGA: + settimer(modenegotiated); + /* FALL THROUGH */ + case TELOPT_STATUS: +#if defined(AUTHENTICATION) + case TELOPT_AUTHENTICATION: +#endif +#ifdef ENCRYPTION + case TELOPT_ENCRYPT: +#endif /* ENCRYPTION */ + new_state_ok = 1; + break; + + case TELOPT_TM: + if (flushout) + flushout = 0; + /* + * Special case for TM. If we get back a WILL, + * pretend we got back a WONT. + */ + set_my_want_state_dont(option); + set_my_state_dont(option); + return; /* Never reply to TM will's/wont's */ + + case TELOPT_LINEMODE: + default: + break; + } + + if (new_state_ok) { + set_my_want_state_do(option); + send_do(option, 0); + setconnmode(0); /* possibly set new tty mode */ + } else { + do_dont_resp[option]++; + send_dont(option, 0); + } + } + set_my_state_do(option); +#ifdef ENCRYPTION + if (option == TELOPT_ENCRYPT) + encrypt_send_support(); +#endif /* ENCRYPTION */ +} + + void +wontoption(option) + int option; +{ + if (do_dont_resp[option]) { + --do_dont_resp[option]; + if (do_dont_resp[option] && my_state_is_dont(option)) + --do_dont_resp[option]; + } + + if ((do_dont_resp[option] == 0) && my_want_state_is_do(option)) { + + switch (option) { + +#ifdef KLUDGELINEMODE + case TELOPT_SGA: + if (!kludgelinemode) + break; + /* FALL THROUGH */ +#endif + case TELOPT_ECHO: + settimer(modenegotiated); + break; + + case TELOPT_TM: + if (flushout) + flushout = 0; + set_my_want_state_dont(option); + set_my_state_dont(option); + return; /* Never reply to TM will's/wont's */ + + default: + break; + } + set_my_want_state_dont(option); + if (my_state_is_do(option)) + send_dont(option, 0); + setconnmode(0); /* Set new tty mode */ + } else if (option == TELOPT_TM) { + /* + * Special case for TM. + */ + if (flushout) + flushout = 0; + set_my_want_state_dont(option); + } + set_my_state_dont(option); +} + + static void +dooption(option) + int option; +{ + int new_state_ok = 0; + + if (will_wont_resp[option]) { + --will_wont_resp[option]; + if (will_wont_resp[option] && my_state_is_will(option)) + --will_wont_resp[option]; + } + + if (will_wont_resp[option] == 0) { + if (my_want_state_is_wont(option)) { + + switch (option) { + + case TELOPT_TM: + /* + * Special case for TM. We send a WILL, but pretend + * we sent WONT. + */ + send_will(option, 0); + set_my_want_state_wont(TELOPT_TM); + set_my_state_wont(TELOPT_TM); + return; + +# if defined(TN3270) + case TELOPT_EOR: /* end of record */ +# endif /* defined(TN3270) */ + case TELOPT_BINARY: /* binary mode */ + case TELOPT_NAWS: /* window size */ + case TELOPT_TSPEED: /* terminal speed */ + case TELOPT_LFLOW: /* local flow control */ + case TELOPT_TTYPE: /* terminal type option */ + case TELOPT_SGA: /* no big deal */ +#ifdef ENCRYPTION + case TELOPT_ENCRYPT: /* encryption variable option */ +#endif /* ENCRYPTION */ + new_state_ok = 1; + break; + + case TELOPT_NEW_ENVIRON: /* New environment variable option */ +#ifdef OLD_ENVIRON + if (my_state_is_will(TELOPT_OLD_ENVIRON)) + send_wont(TELOPT_OLD_ENVIRON, 1); /* turn off the old */ + goto env_common; + case TELOPT_OLD_ENVIRON: /* Old environment variable option */ + if (my_state_is_will(TELOPT_NEW_ENVIRON)) + break; /* Don't enable if new one is in use! */ + env_common: + telopt_environ = option; +#endif + new_state_ok = 1; + break; + +#if defined(AUTHENTICATION) + case TELOPT_AUTHENTICATION: + if (autologin) + new_state_ok = 1; + break; +#endif + + case TELOPT_XDISPLOC: /* X Display location */ + if (env_getvalue((unsigned char *)"DISPLAY")) + new_state_ok = 1; + break; + + case TELOPT_LINEMODE: +#ifdef KLUDGELINEMODE + kludgelinemode = 0; + send_do(TELOPT_SGA, 1); +#endif + set_my_want_state_will(TELOPT_LINEMODE); + send_will(option, 0); + set_my_state_will(TELOPT_LINEMODE); + slc_init(); + return; + + case TELOPT_ECHO: /* We're never going to echo... */ + default: + break; + } + + if (new_state_ok) { + set_my_want_state_will(option); + send_will(option, 0); + setconnmode(0); /* Set new tty mode */ + } else { + will_wont_resp[option]++; + send_wont(option, 0); + } + } else { + /* + * Handle options that need more things done after the + * other side has acknowledged the option. + */ + switch (option) { + case TELOPT_LINEMODE: +#ifdef KLUDGELINEMODE + kludgelinemode = 0; + send_do(TELOPT_SGA, 1); +#endif + set_my_state_will(option); + slc_init(); + send_do(TELOPT_SGA, 0); + return; + } + } + } + set_my_state_will(option); +} + + static void +dontoption(option) + int option; +{ + + if (will_wont_resp[option]) { + --will_wont_resp[option]; + if (will_wont_resp[option] && my_state_is_wont(option)) + --will_wont_resp[option]; + } + + if ((will_wont_resp[option] == 0) && my_want_state_is_will(option)) { + switch (option) { + case TELOPT_LINEMODE: + linemode = 0; /* put us back to the default state */ + break; +#ifdef OLD_ENVIRON + case TELOPT_NEW_ENVIRON: + /* + * The new environ option wasn't recognized, try + * the old one. + */ + send_will(TELOPT_OLD_ENVIRON, 1); + telopt_environ = TELOPT_OLD_ENVIRON; + break; +#endif + } + /* we always accept a DONT */ + set_my_want_state_wont(option); + if (my_state_is_will(option)) + send_wont(option, 0); + setconnmode(0); /* Set new tty mode */ + } + set_my_state_wont(option); +} + +/* + * Given a buffer returned by tgetent(), this routine will turn + * the pipe seperated list of names in the buffer into an array + * of pointers to null terminated names. We toss out any bad, + * duplicate, or verbose names (names with spaces). + */ + +static char *name_unknown = "UNKNOWN"; +static char *unknown[] = { 0, 0 }; + + char ** +mklist(buf, name) + char *buf, *name; +{ + register int n; + register char c, *cp, **argvp, *cp2, **argv, **avt; + + if (name) { + if ((int)strlen(name) > 40) { + name = 0; + unknown[0] = name_unknown; + } else { + unknown[0] = name; + upcase(name); + } + } else + unknown[0] = name_unknown; + /* + * Count up the number of names. + */ + for (n = 1, cp = buf; *cp && *cp != ':'; cp++) { + if (*cp == '|') + n++; + } + /* + * Allocate an array to put the name pointers into + */ + argv = (char **)malloc((n+3)*sizeof(char *)); + if (argv == 0) + return(unknown); + + /* + * Fill up the array of pointers to names. + */ + *argv = 0; + argvp = argv+1; + n = 0; + for (cp = cp2 = buf; (c = *cp); cp++) { + if (c == '|' || c == ':') { + *cp++ = '\0'; + /* + * Skip entries that have spaces or are over 40 + * characters long. If this is our environment + * name, then put it up front. Otherwise, as + * long as this is not a duplicate name (case + * insensitive) add it to the list. + */ + if (n || (cp - cp2 > 41)) + ; + else if (name && (strncasecmp(name, cp2, cp-cp2) == 0)) + *argv = cp2; + else if (is_unique(cp2, argv+1, argvp)) + *argvp++ = cp2; + if (c == ':') + break; + /* + * Skip multiple delimiters. Reset cp2 to + * the beginning of the next name. Reset n, + * the flag for names with spaces. + */ + while ((c = *cp) == '|') + cp++; + cp2 = cp; + n = 0; + } + /* + * Skip entries with spaces or non-ascii values. + * Convert lower case letters to upper case. + */ + if ((c == ' ') || !isascii(c)) + n = 1; + else if (islower(c)) + *cp = toupper(c); + } + + /* + * Check for an old V6 2 character name. If the second + * name points to the beginning of the buffer, and is + * only 2 characters long, move it to the end of the array. + */ + if ((argv[1] == buf) && (strlen(argv[1]) == 2)) { + --argvp; + for (avt = &argv[1]; avt < argvp; avt++) + *avt = *(avt+1); + *argvp++ = buf; + } + + /* + * Duplicate last name, for TTYPE option, and null + * terminate the array. If we didn't find a match on + * our terminal name, put that name at the beginning. + */ + cp = *(argvp-1); + *argvp++ = cp; + *argvp = 0; + + if (*argv == 0) { + if (name) + *argv = name; + else { + --argvp; + for (avt = argv; avt < argvp; avt++) + *avt = *(avt+1); + } + } + if (*argv) + return(argv); + else + return(unknown); +} + + int +is_unique(name, as, ae) + register char *name, **as, **ae; +{ + register char **ap; + register int n; + + n = strlen(name) + 1; + for (ap = as; ap < ae; ap++) + if (strncasecmp(*ap, name, n) == 0) + return(0); + return (1); +} + +#ifdef TERMCAP +char termbuf[1024]; + + /*ARGSUSED*/ + int +setupterm(tname, fd, errp) + char *tname; + int fd, *errp; +{ + if (tgetent(termbuf, tname) == 1) { + termbuf[1023] = '\0'; + if (errp) + *errp = 1; + return(0); + } + if (errp) + *errp = 0; + return(-1); +} +#else +#define termbuf ttytype +extern char ttytype[]; +#endif + +int resettermname = 1; + + char * +gettermname() +{ + char *tname; + static char **tnamep = 0; + static char **next; + int err; + + if (resettermname) { + resettermname = 0; + if (tnamep && tnamep != unknown) + free(tnamep); + if ((tname = (char *)env_getvalue((unsigned char *)"TERM")) && + (setupterm(tname, 1, &err) == 0)) { + tnamep = mklist(termbuf, tname); + } else { + if (tname && ((int)strlen(tname) <= 40)) { + unknown[0] = tname; + upcase(tname); + } else + unknown[0] = name_unknown; + tnamep = unknown; + } + next = tnamep; + } + if (*next == 0) + next = tnamep; + return(*next++); +} +/* + * suboption() + * + * Look at the sub-option buffer, and try to be helpful to the other + * side. + * + * Currently we recognize: + * + * Terminal type, send request. + * Terminal speed (send request). + * Local flow control (is request). + * Linemode + */ + + static void +suboption() +{ + unsigned char subchar; + + printsub('<', subbuffer, SB_LEN()+2); + switch (subchar = SB_GET()) { + case TELOPT_TTYPE: + if (my_want_state_is_wont(TELOPT_TTYPE)) + return; + if (SB_EOF() || SB_GET() != TELQUAL_SEND) { + return; + } else { + char *name; + unsigned char temp[50]; + int len; + +#if defined(TN3270) + if (tn3270_ttype()) { + return; + } +#endif /* defined(TN3270) */ + name = gettermname(); + len = strlen(name) + 4 + 2; + if (len < NETROOM()) { + sprintf((char *)temp, "%c%c%c%c%s%c%c", IAC, SB, TELOPT_TTYPE, + TELQUAL_IS, name, IAC, SE); + ring_supply_data(&netoring, temp, len); + printsub('>', &temp[2], len-2); + } else { + ExitString("No room in buffer for terminal type.\n", 1); + /*NOTREACHED*/ + } + } + break; + case TELOPT_TSPEED: + if (my_want_state_is_wont(TELOPT_TSPEED)) + return; + if (SB_EOF()) + return; + if (SB_GET() == TELQUAL_SEND) { + long ospeed, ispeed; + unsigned char temp[50]; + int len; + + TerminalSpeeds(&ispeed, &ospeed); + + sprintf((char *)temp, "%c%c%c%c%d,%d%c%c", IAC, SB, TELOPT_TSPEED, + TELQUAL_IS, ospeed, ispeed, IAC, SE); + len = strlen((char *)temp+4) + 4; /* temp[3] is 0 ... */ + + if (len < NETROOM()) { + ring_supply_data(&netoring, temp, len); + printsub('>', temp+2, len - 2); + } +/*@*/ else printf("lm_will: not enough room in buffer\n"); + } + break; + case TELOPT_LFLOW: + if (my_want_state_is_wont(TELOPT_LFLOW)) + return; + if (SB_EOF()) + return; + switch(SB_GET()) { + case LFLOW_RESTART_ANY: + restartany = 1; + break; + case LFLOW_RESTART_XON: + restartany = 0; + break; + case LFLOW_ON: + localflow = 1; + break; + case LFLOW_OFF: + localflow = 0; + break; + default: + return; + } + setcommandmode(); + setconnmode(0); + break; + + case TELOPT_LINEMODE: + if (my_want_state_is_wont(TELOPT_LINEMODE)) + return; + if (SB_EOF()) + return; + switch (SB_GET()) { + case WILL: + lm_will(subpointer, SB_LEN()); + break; + case WONT: + lm_wont(subpointer, SB_LEN()); + break; + case DO: + lm_do(subpointer, SB_LEN()); + break; + case DONT: + lm_dont(subpointer, SB_LEN()); + break; + case LM_SLC: + slc(subpointer, SB_LEN()); + break; + case LM_MODE: + lm_mode(subpointer, SB_LEN(), 0); + break; + default: + break; + } + break; + +#ifdef OLD_ENVIRON + case TELOPT_OLD_ENVIRON: +#endif + case TELOPT_NEW_ENVIRON: + if (SB_EOF()) + return; + switch(SB_PEEK()) { + case TELQUAL_IS: + case TELQUAL_INFO: + if (my_want_state_is_dont(subchar)) + return; + break; + case TELQUAL_SEND: + if (my_want_state_is_wont(subchar)) { + return; + } + break; + default: + return; + } + env_opt(subpointer, SB_LEN()); + break; + + case TELOPT_XDISPLOC: + if (my_want_state_is_wont(TELOPT_XDISPLOC)) + return; + if (SB_EOF()) + return; + if (SB_GET() == TELQUAL_SEND) { + unsigned char temp[50], *dp; + int len; + + if ((dp = env_getvalue((unsigned char *)"DISPLAY")) == NULL) { + /* + * Something happened, we no longer have a DISPLAY + * variable. So, turn off the option. + */ + send_wont(TELOPT_XDISPLOC, 1); + break; + } + sprintf((char *)temp, "%c%c%c%c%s%c%c", IAC, SB, TELOPT_XDISPLOC, + TELQUAL_IS, dp, IAC, SE); + len = strlen((char *)temp+4) + 4; /* temp[3] is 0 ... */ + + if (len < NETROOM()) { + ring_supply_data(&netoring, temp, len); + printsub('>', temp+2, len - 2); + } +/*@*/ else printf("lm_will: not enough room in buffer\n"); + } + break; + +#if defined(AUTHENTICATION) + case TELOPT_AUTHENTICATION: { + if (!autologin) + break; + if (SB_EOF()) + return; + switch(SB_GET()) { + case TELQUAL_IS: + if (my_want_state_is_dont(TELOPT_AUTHENTICATION)) + return; + auth_is(subpointer, SB_LEN()); + break; + case TELQUAL_SEND: + if (my_want_state_is_wont(TELOPT_AUTHENTICATION)) + return; + auth_send(subpointer, SB_LEN()); + break; + case TELQUAL_REPLY: + if (my_want_state_is_wont(TELOPT_AUTHENTICATION)) + return; + auth_reply(subpointer, SB_LEN()); + break; + case TELQUAL_NAME: + if (my_want_state_is_dont(TELOPT_AUTHENTICATION)) + return; + auth_name(subpointer, SB_LEN()); + break; + } + } + break; +#endif +#ifdef ENCRYPTION + case TELOPT_ENCRYPT: + if (SB_EOF()) + return; + switch(SB_GET()) { + case ENCRYPT_START: + if (my_want_state_is_dont(TELOPT_ENCRYPT)) + return; + encrypt_start(subpointer, SB_LEN()); + break; + case ENCRYPT_END: + if (my_want_state_is_dont(TELOPT_ENCRYPT)) + return; + encrypt_end(); + break; + case ENCRYPT_SUPPORT: + if (my_want_state_is_wont(TELOPT_ENCRYPT)) + return; + encrypt_support(subpointer, SB_LEN()); + break; + case ENCRYPT_REQSTART: + if (my_want_state_is_wont(TELOPT_ENCRYPT)) + return; + encrypt_request_start(subpointer, SB_LEN()); + break; + case ENCRYPT_REQEND: + if (my_want_state_is_wont(TELOPT_ENCRYPT)) + return; + /* + * We can always send an REQEND so that we cannot + * get stuck encrypting. We should only get this + * if we have been able to get in the correct mode + * anyhow. + */ + encrypt_request_end(); + break; + case ENCRYPT_IS: + if (my_want_state_is_dont(TELOPT_ENCRYPT)) + return; + encrypt_is(subpointer, SB_LEN()); + break; + case ENCRYPT_REPLY: + if (my_want_state_is_wont(TELOPT_ENCRYPT)) + return; + encrypt_reply(subpointer, SB_LEN()); + break; + case ENCRYPT_ENC_KEYID: + if (my_want_state_is_dont(TELOPT_ENCRYPT)) + return; + encrypt_enc_keyid(subpointer, SB_LEN()); + break; + case ENCRYPT_DEC_KEYID: + if (my_want_state_is_wont(TELOPT_ENCRYPT)) + return; + encrypt_dec_keyid(subpointer, SB_LEN()); + break; + default: + break; + } + break; +#endif /* ENCRYPTION */ + default: + break; + } +} + +static unsigned char str_lm[] = { IAC, SB, TELOPT_LINEMODE, 0, 0, IAC, SE }; + + void +lm_will(cmd, len) + unsigned char *cmd; + int len; +{ + if (len < 1) { +/*@*/ printf("lm_will: no command!!!\n"); /* Should not happen... */ + return; + } + switch(cmd[0]) { + case LM_FORWARDMASK: /* We shouldn't ever get this... */ + default: + str_lm[3] = DONT; + str_lm[4] = cmd[0]; + if (NETROOM() > sizeof(str_lm)) { + ring_supply_data(&netoring, str_lm, sizeof(str_lm)); + printsub('>', &str_lm[2], sizeof(str_lm)-2); + } +/*@*/ else printf("lm_will: not enough room in buffer\n"); + break; + } +} + + void +lm_wont(cmd, len) + unsigned char *cmd; + int len; +{ + if (len < 1) { +/*@*/ printf("lm_wont: no command!!!\n"); /* Should not happen... */ + return; + } + switch(cmd[0]) { + case LM_FORWARDMASK: /* We shouldn't ever get this... */ + default: + /* We are always DONT, so don't respond */ + return; + } +} + + void +lm_do(cmd, len) + unsigned char *cmd; + int len; +{ + if (len < 1) { +/*@*/ printf("lm_do: no command!!!\n"); /* Should not happen... */ + return; + } + switch(cmd[0]) { + case LM_FORWARDMASK: + default: + str_lm[3] = WONT; + str_lm[4] = cmd[0]; + if (NETROOM() > sizeof(str_lm)) { + ring_supply_data(&netoring, str_lm, sizeof(str_lm)); + printsub('>', &str_lm[2], sizeof(str_lm)-2); + } +/*@*/ else printf("lm_do: not enough room in buffer\n"); + break; + } +} + + void +lm_dont(cmd, len) + unsigned char *cmd; + int len; +{ + if (len < 1) { +/*@*/ printf("lm_dont: no command!!!\n"); /* Should not happen... */ + return; + } + switch(cmd[0]) { + case LM_FORWARDMASK: + default: + /* we are always WONT, so don't respond */ + break; + } +} + +static unsigned char str_lm_mode[] = { + IAC, SB, TELOPT_LINEMODE, LM_MODE, 0, IAC, SE +}; + + void +lm_mode(cmd, len, init) + unsigned char *cmd; + int len, init; +{ + if (len != 1) + return; + if ((linemode&MODE_MASK&~MODE_ACK) == *cmd) + return; + if (*cmd&MODE_ACK) + return; + linemode = *cmd&(MODE_MASK&~MODE_ACK); + str_lm_mode[4] = linemode; + if (!init) + str_lm_mode[4] |= MODE_ACK; + if (NETROOM() > sizeof(str_lm_mode)) { + ring_supply_data(&netoring, str_lm_mode, sizeof(str_lm_mode)); + printsub('>', &str_lm_mode[2], sizeof(str_lm_mode)-2); + } +/*@*/ else printf("lm_mode: not enough room in buffer\n"); + setconnmode(0); /* set changed mode */ +} + + + +/* + * slc() + * Handle special character suboption of LINEMODE. + */ + +struct spc { + cc_t val; + cc_t *valp; + char flags; /* Current flags & level */ + char mylevel; /* Maximum level & flags */ +} spc_data[NSLC+1]; + +#define SLC_IMPORT 0 +#define SLC_EXPORT 1 +#define SLC_RVALUE 2 +static int slc_mode = SLC_EXPORT; + + void +slc_init() +{ + register struct spc *spcp; + + localchars = 1; + for (spcp = spc_data; spcp < &spc_data[NSLC+1]; spcp++) { + spcp->val = 0; + spcp->valp = 0; + spcp->flags = spcp->mylevel = SLC_NOSUPPORT; + } + +#define initfunc(func, flags) { \ + spcp = &spc_data[func]; \ + if (spcp->valp = tcval(func)) { \ + spcp->val = *spcp->valp; \ + spcp->mylevel = SLC_VARIABLE|flags; \ + } else { \ + spcp->val = 0; \ + spcp->mylevel = SLC_DEFAULT; \ + } \ + } + + initfunc(SLC_SYNCH, 0); + /* No BRK */ + initfunc(SLC_AO, 0); + initfunc(SLC_AYT, 0); + /* No EOR */ + initfunc(SLC_ABORT, SLC_FLUSHIN|SLC_FLUSHOUT); + initfunc(SLC_EOF, 0); +#ifndef SYSV_TERMIO + initfunc(SLC_SUSP, SLC_FLUSHIN); +#endif + initfunc(SLC_EC, 0); + initfunc(SLC_EL, 0); +#ifndef SYSV_TERMIO + initfunc(SLC_EW, 0); + initfunc(SLC_RP, 0); + initfunc(SLC_LNEXT, 0); +#endif + initfunc(SLC_XON, 0); + initfunc(SLC_XOFF, 0); +#ifdef SYSV_TERMIO + spc_data[SLC_XON].mylevel = SLC_CANTCHANGE; + spc_data[SLC_XOFF].mylevel = SLC_CANTCHANGE; +#endif + initfunc(SLC_FORW1, 0); +#ifdef USE_TERMIO + initfunc(SLC_FORW2, 0); + /* No FORW2 */ +#endif + + initfunc(SLC_IP, SLC_FLUSHIN|SLC_FLUSHOUT); +#undef initfunc + + if (slc_mode == SLC_EXPORT) + slc_export(); + else + slc_import(1); + +} + + void +slcstate() +{ + printf("Special characters are %s values\n", + slc_mode == SLC_IMPORT ? "remote default" : + slc_mode == SLC_EXPORT ? "local" : + "remote"); +} + + void +slc_mode_export() +{ + slc_mode = SLC_EXPORT; + if (my_state_is_will(TELOPT_LINEMODE)) + slc_export(); +} + + void +slc_mode_import(def) + int def; +{ + slc_mode = def ? SLC_IMPORT : SLC_RVALUE; + if (my_state_is_will(TELOPT_LINEMODE)) + slc_import(def); +} + +unsigned char slc_import_val[] = { + IAC, SB, TELOPT_LINEMODE, LM_SLC, 0, SLC_VARIABLE, 0, IAC, SE +}; +unsigned char slc_import_def[] = { + IAC, SB, TELOPT_LINEMODE, LM_SLC, 0, SLC_DEFAULT, 0, IAC, SE +}; + + void +slc_import(def) + int def; +{ + if (NETROOM() > sizeof(slc_import_val)) { + if (def) { + ring_supply_data(&netoring, slc_import_def, sizeof(slc_import_def)); + printsub('>', &slc_import_def[2], sizeof(slc_import_def)-2); + } else { + ring_supply_data(&netoring, slc_import_val, sizeof(slc_import_val)); + printsub('>', &slc_import_val[2], sizeof(slc_import_val)-2); + } + } +/*@*/ else printf("slc_import: not enough room\n"); +} + + void +slc_export() +{ + register struct spc *spcp; + + TerminalDefaultChars(); + + slc_start_reply(); + for (spcp = &spc_data[1]; spcp < &spc_data[NSLC+1]; spcp++) { + if (spcp->mylevel != SLC_NOSUPPORT) { + if (spcp->val == (cc_t)(_POSIX_VDISABLE)) + spcp->flags = SLC_NOSUPPORT; + else + spcp->flags = spcp->mylevel; + if (spcp->valp) + spcp->val = *spcp->valp; + slc_add_reply(spcp - spc_data, spcp->flags, spcp->val); + } + } + slc_end_reply(); + (void)slc_update(); + setconnmode(1); /* Make sure the character values are set */ +} + + void +slc(cp, len) + register unsigned char *cp; + int len; +{ + register struct spc *spcp; + register int func,level; + + slc_start_reply(); + + for (; len >= 3; len -=3, cp +=3) { + + func = cp[SLC_FUNC]; + + if (func == 0) { + /* + * Client side: always ignore 0 function. + */ + continue; + } + if (func > NSLC) { + if ((cp[SLC_FLAGS] & SLC_LEVELBITS) != SLC_NOSUPPORT) + slc_add_reply(func, SLC_NOSUPPORT, 0); + continue; + } + + spcp = &spc_data[func]; + + level = cp[SLC_FLAGS]&(SLC_LEVELBITS|SLC_ACK); + + if ((cp[SLC_VALUE] == (unsigned char)spcp->val) && + ((level&SLC_LEVELBITS) == (spcp->flags&SLC_LEVELBITS))) { + continue; + } + + if (level == (SLC_DEFAULT|SLC_ACK)) { + /* + * This is an error condition, the SLC_ACK + * bit should never be set for the SLC_DEFAULT + * level. Our best guess to recover is to + * ignore the SLC_ACK bit. + */ + cp[SLC_FLAGS] &= ~SLC_ACK; + } + + if (level == ((spcp->flags&SLC_LEVELBITS)|SLC_ACK)) { + spcp->val = (cc_t)cp[SLC_VALUE]; + spcp->flags = cp[SLC_FLAGS]; /* include SLC_ACK */ + continue; + } + + level &= ~SLC_ACK; + + if (level <= (spcp->mylevel&SLC_LEVELBITS)) { + spcp->flags = cp[SLC_FLAGS]|SLC_ACK; + spcp->val = (cc_t)cp[SLC_VALUE]; + } + if (level == SLC_DEFAULT) { + if ((spcp->mylevel&SLC_LEVELBITS) != SLC_DEFAULT) + spcp->flags = spcp->mylevel; + else + spcp->flags = SLC_NOSUPPORT; + } + slc_add_reply(func, spcp->flags, spcp->val); + } + slc_end_reply(); + if (slc_update()) + setconnmode(1); /* set the new character values */ +} + + void +slc_check() +{ + register struct spc *spcp; + + slc_start_reply(); + for (spcp = &spc_data[1]; spcp < &spc_data[NSLC+1]; spcp++) { + if (spcp->valp && spcp->val != *spcp->valp) { + spcp->val = *spcp->valp; + if (spcp->val == (cc_t)(_POSIX_VDISABLE)) + spcp->flags = SLC_NOSUPPORT; + else + spcp->flags = spcp->mylevel; + slc_add_reply(spcp - spc_data, spcp->flags, spcp->val); + } + } + slc_end_reply(); + setconnmode(1); +} + + +unsigned char slc_reply[128]; +unsigned char *slc_replyp; + + void +slc_start_reply() +{ + slc_replyp = slc_reply; + *slc_replyp++ = IAC; + *slc_replyp++ = SB; + *slc_replyp++ = TELOPT_LINEMODE; + *slc_replyp++ = LM_SLC; +} + + void +slc_add_reply(func, flags, value) + unsigned char func; + unsigned char flags; + cc_t value; +{ + if ((*slc_replyp++ = func) == IAC) + *slc_replyp++ = IAC; + if ((*slc_replyp++ = flags) == IAC) + *slc_replyp++ = IAC; + if ((*slc_replyp++ = (unsigned char)value) == IAC) + *slc_replyp++ = IAC; +} + + void +slc_end_reply() +{ + register int len; + + *slc_replyp++ = IAC; + *slc_replyp++ = SE; + len = slc_replyp - slc_reply; + if (len <= 6) + return; + if (NETROOM() > len) { + ring_supply_data(&netoring, slc_reply, slc_replyp - slc_reply); + printsub('>', &slc_reply[2], slc_replyp - slc_reply - 2); + } +/*@*/else printf("slc_end_reply: not enough room\n"); +} + + int +slc_update() +{ + register struct spc *spcp; + int need_update = 0; + + for (spcp = &spc_data[1]; spcp < &spc_data[NSLC+1]; spcp++) { + if (!(spcp->flags&SLC_ACK)) + continue; + spcp->flags &= ~SLC_ACK; + if (spcp->valp && (*spcp->valp != spcp->val)) { + *spcp->valp = spcp->val; + need_update = 1; + } + } + return(need_update); +} + +#ifdef OLD_ENVIRON +# ifdef ENV_HACK +/* + * Earlier version of telnet/telnetd from the BSD code had + * the definitions of VALUE and VAR reversed. To ensure + * maximum interoperability, we assume that the server is + * an older BSD server, until proven otherwise. The newer + * BSD servers should be able to handle either definition, + * so it is better to use the wrong values if we don't + * know what type of server it is. + */ +int env_auto = 1; +int old_env_var = OLD_ENV_VAR; +int old_env_value = OLD_ENV_VALUE; +# else +# define old_env_var OLD_ENV_VAR +# define old_env_value OLD_ENV_VALUE +# endif +#endif + + void +env_opt(buf, len) + register unsigned char *buf; + register int len; +{ + register unsigned char *ep = 0, *epc = 0; + register int i; + + switch(buf[0]&0xff) { + case TELQUAL_SEND: + env_opt_start(); + if (len == 1) { + env_opt_add(NULL); + } else for (i = 1; i < len; i++) { + switch (buf[i]&0xff) { +#ifdef OLD_ENVIRON + case OLD_ENV_VAR: +# ifdef ENV_HACK + if (telopt_environ == TELOPT_OLD_ENVIRON + && env_auto) { + /* Server has the same definitions */ + old_env_var = OLD_ENV_VAR; + old_env_value = OLD_ENV_VALUE; + } + /* FALL THROUGH */ +# endif + case OLD_ENV_VALUE: + /* + * Although OLD_ENV_VALUE is not legal, we will + * still recognize it, just in case it is an + * old server that has VAR & VALUE mixed up... + */ + /* FALL THROUGH */ +#else + case NEW_ENV_VAR: +#endif + case ENV_USERVAR: + if (ep) { + *epc = 0; + env_opt_add(ep); + } + ep = epc = &buf[i+1]; + break; + case ENV_ESC: + i++; + /*FALL THROUGH*/ + default: + if (epc) + *epc++ = buf[i]; + break; + } + } + if (ep) { + *epc = 0; + env_opt_add(ep); + } + env_opt_end(1); + break; + + case TELQUAL_IS: + case TELQUAL_INFO: + /* Ignore for now. We shouldn't get it anyway. */ + break; + + default: + break; + } +} + +#define OPT_REPLY_SIZE 256 +unsigned char *opt_reply; +unsigned char *opt_replyp; +unsigned char *opt_replyend; + + void +env_opt_start() +{ + if (opt_reply) + opt_reply = (unsigned char *)realloc(opt_reply, OPT_REPLY_SIZE); + else + opt_reply = (unsigned char *)malloc(OPT_REPLY_SIZE); + if (opt_reply == NULL) { +/*@*/ printf("env_opt_start: malloc()/realloc() failed!!!\n"); + opt_reply = opt_replyp = opt_replyend = NULL; + return; + } + opt_replyp = opt_reply; + opt_replyend = opt_reply + OPT_REPLY_SIZE; + *opt_replyp++ = IAC; + *opt_replyp++ = SB; + *opt_replyp++ = telopt_environ; + *opt_replyp++ = TELQUAL_IS; +} + + void +env_opt_start_info() +{ + env_opt_start(); + if (opt_replyp) + opt_replyp[-1] = TELQUAL_INFO; +} + + void +env_opt_add(ep) + register unsigned char *ep; +{ + register unsigned char *vp, c; + + if (opt_reply == NULL) /*XXX*/ + return; /*XXX*/ + + if (ep == NULL || *ep == '\0') { + /* Send user defined variables first. */ + env_default(1, 0); + while (ep = env_default(0, 0)) + env_opt_add(ep); + + /* Now add the list of well know variables. */ + env_default(1, 1); + while (ep = env_default(0, 1)) + env_opt_add(ep); + return; + } + vp = env_getvalue(ep); + if (opt_replyp + (vp ? strlen((char *)vp) : 0) + + strlen((char *)ep) + 6 > opt_replyend) + { + register int len; + opt_replyend += OPT_REPLY_SIZE; + len = opt_replyend - opt_reply; + opt_reply = (unsigned char *)realloc(opt_reply, len); + if (opt_reply == NULL) { +/*@*/ printf("env_opt_add: realloc() failed!!!\n"); + opt_reply = opt_replyp = opt_replyend = NULL; + return; + } + opt_replyp = opt_reply + len - (opt_replyend - opt_replyp); + opt_replyend = opt_reply + len; + } + if (opt_welldefined(ep)) +#ifdef OLD_ENVIRON + if (telopt_environ == TELOPT_OLD_ENVIRON) + *opt_replyp++ = old_env_var; + else +#endif + *opt_replyp++ = NEW_ENV_VAR; + else + *opt_replyp++ = ENV_USERVAR; + for (;;) { + while (c = *ep++) { + switch(c&0xff) { + case IAC: + *opt_replyp++ = IAC; + break; + case NEW_ENV_VAR: + case NEW_ENV_VALUE: + case ENV_ESC: + case ENV_USERVAR: + *opt_replyp++ = ENV_ESC; + break; + } + *opt_replyp++ = c; + } + if (ep = vp) { +#ifdef OLD_ENVIRON + if (telopt_environ == TELOPT_OLD_ENVIRON) + *opt_replyp++ = old_env_value; + else +#endif + *opt_replyp++ = NEW_ENV_VALUE; + vp = NULL; + } else + break; + } +} + + int +opt_welldefined(ep) + char *ep; +{ + if ((strcmp(ep, "USER") == 0) || + (strcmp(ep, "DISPLAY") == 0) || + (strcmp(ep, "PRINTER") == 0) || + (strcmp(ep, "SYSTEMTYPE") == 0) || + (strcmp(ep, "JOB") == 0) || + (strcmp(ep, "ACCT") == 0)) + return(1); + return(0); +} + void +env_opt_end(emptyok) + register int emptyok; +{ + register int len; + + len = opt_replyp - opt_reply + 2; + if (emptyok || len > 6) { + *opt_replyp++ = IAC; + *opt_replyp++ = SE; + if (NETROOM() > len) { + ring_supply_data(&netoring, opt_reply, len); + printsub('>', &opt_reply[2], len - 2); + } +/*@*/ else printf("slc_end_reply: not enough room\n"); + } + if (opt_reply) { + free(opt_reply); + opt_reply = opt_replyp = opt_replyend = NULL; + } +} + + + + int +telrcv() +{ + register int c; + register int scc; + register unsigned char *sbp; + int count; + int returnValue = 0; + + scc = 0; + count = 0; + while (TTYROOM() > 2) { + if (scc == 0) { + if (count) { + ring_consumed(&netiring, count); + returnValue = 1; + count = 0; + } + sbp = netiring.consume; + scc = ring_full_consecutive(&netiring); + if (scc == 0) { + /* No more data coming in */ + break; + } + } + + c = *sbp++ & 0xff, scc--; count++; +#ifdef ENCRYPTION + if (decrypt_input) + c = (*decrypt_input)(c); +#endif /* ENCRYPTION */ + + switch (telrcv_state) { + + case TS_CR: + telrcv_state = TS_DATA; + if (c == '\0') { + break; /* Ignore \0 after CR */ + } + else if ((c == '\n') && my_want_state_is_dont(TELOPT_ECHO) && !crmod) { + TTYADD(c); + break; + } + /* Else, fall through */ + + case TS_DATA: + if (c == IAC) { + telrcv_state = TS_IAC; + break; + } +# if defined(TN3270) + if (In3270) { + *Ifrontp++ = c; + while (scc > 0) { + c = *sbp++ & 0377, scc--; count++; +#ifdef ENCRYPTION + if (decrypt_input) + c = (*decrypt_input)(c); +#endif /* ENCRYPTION */ + if (c == IAC) { + telrcv_state = TS_IAC; + break; + } + *Ifrontp++ = c; + } + } else +# endif /* defined(TN3270) */ + /* + * The 'crmod' hack (see following) is needed + * since we can't * set CRMOD on output only. + * Machines like MULTICS like to send \r without + * \n; since we must turn off CRMOD to get proper + * input, the mapping is done here (sigh). + */ + if ((c == '\r') && my_want_state_is_dont(TELOPT_BINARY)) { + if (scc > 0) { + c = *sbp&0xff; +#ifdef ENCRYPTION + if (decrypt_input) + c = (*decrypt_input)(c); +#endif /* ENCRYPTION */ + if (c == 0) { + sbp++, scc--; count++; + /* a "true" CR */ + TTYADD('\r'); + } else if (my_want_state_is_dont(TELOPT_ECHO) && + (c == '\n')) { + sbp++, scc--; count++; + TTYADD('\n'); + } else { +#ifdef ENCRYPTION + if (decrypt_input) + (*decrypt_input)(-1); +#endif /* ENCRYPTION */ + + TTYADD('\r'); + if (crmod) { + TTYADD('\n'); + } + } + } else { + telrcv_state = TS_CR; + TTYADD('\r'); + if (crmod) { + TTYADD('\n'); + } + } + } else { + TTYADD(c); + } + continue; + + case TS_IAC: +process_iac: + switch (c) { + + case WILL: + telrcv_state = TS_WILL; + continue; + + case WONT: + telrcv_state = TS_WONT; + continue; + + case DO: + telrcv_state = TS_DO; + continue; + + case DONT: + telrcv_state = TS_DONT; + continue; + + case DM: + /* + * We may have missed an urgent notification, + * so make sure we flush whatever is in the + * buffer currently. + */ + printoption("RCVD", IAC, DM); + SYNCHing = 1; + (void) ttyflush(1); + SYNCHing = stilloob(); + settimer(gotDM); + break; + + case SB: + SB_CLEAR(); + telrcv_state = TS_SB; + continue; + +# if defined(TN3270) + case EOR: + if (In3270) { + if (Ibackp == Ifrontp) { + Ibackp = Ifrontp = Ibuf; + ISend = 0; /* should have been! */ + } else { + Ibackp += DataFromNetwork(Ibackp, Ifrontp-Ibackp, 1); + ISend = 1; + } + } + printoption("RCVD", IAC, EOR); + break; +# endif /* defined(TN3270) */ + + case IAC: +# if !defined(TN3270) + TTYADD(IAC); +# else /* !defined(TN3270) */ + if (In3270) { + *Ifrontp++ = IAC; + } else { + TTYADD(IAC); + } +# endif /* !defined(TN3270) */ + break; + + case NOP: + case GA: + default: + printoption("RCVD", IAC, c); + break; + } + telrcv_state = TS_DATA; + continue; + + case TS_WILL: + printoption("RCVD", WILL, c); + willoption(c); + SetIn3270(); + telrcv_state = TS_DATA; + continue; + + case TS_WONT: + printoption("RCVD", WONT, c); + wontoption(c); + SetIn3270(); + telrcv_state = TS_DATA; + continue; + + case TS_DO: + printoption("RCVD", DO, c); + dooption(c); + SetIn3270(); + if (c == TELOPT_NAWS) { + sendnaws(); + } else if (c == TELOPT_LFLOW) { + localflow = 1; + setcommandmode(); + setconnmode(0); + } + telrcv_state = TS_DATA; + continue; + + case TS_DONT: + printoption("RCVD", DONT, c); + dontoption(c); + flushline = 1; + setconnmode(0); /* set new tty mode (maybe) */ + SetIn3270(); + telrcv_state = TS_DATA; + continue; + + case TS_SB: + if (c == IAC) { + telrcv_state = TS_SE; + } else { + SB_ACCUM(c); + } + continue; + + case TS_SE: + if (c != SE) { + if (c != IAC) { + /* + * This is an error. We only expect to get + * "IAC IAC" or "IAC SE". Several things may + * have happend. An IAC was not doubled, the + * IAC SE was left off, or another option got + * inserted into the suboption are all possibilities. + * If we assume that the IAC was not doubled, + * and really the IAC SE was left off, we could + * get into an infinate loop here. So, instead, + * we terminate the suboption, and process the + * partial suboption if we can. + */ + SB_ACCUM(IAC); + SB_ACCUM(c); + subpointer -= 2; + SB_TERM(); + + printoption("In SUBOPTION processing, RCVD", IAC, c); + suboption(); /* handle sub-option */ + SetIn3270(); + telrcv_state = TS_IAC; + goto process_iac; + } + SB_ACCUM(c); + telrcv_state = TS_SB; + } else { + SB_ACCUM(IAC); + SB_ACCUM(SE); + subpointer -= 2; + SB_TERM(); + suboption(); /* handle sub-option */ + SetIn3270(); + telrcv_state = TS_DATA; + } + } + } + if (count) + ring_consumed(&netiring, count); + return returnValue||count; +} + +static int bol = 1, local = 0; + + int +rlogin_susp() +{ + if (local) { + local = 0; + bol = 1; + command(0, "z\n", 2); + return(1); + } + return(0); +} + + static int +telsnd() +{ + int tcc; + int count; + int returnValue = 0; + unsigned char *tbp; + + tcc = 0; + count = 0; + while (NETROOM() > 2) { + register int sc; + register int c; + + if (tcc == 0) { + if (count) { + ring_consumed(&ttyiring, count); + returnValue = 1; + count = 0; + } + tbp = ttyiring.consume; + tcc = ring_full_consecutive(&ttyiring); + if (tcc == 0) { + break; + } + } + c = *tbp++ & 0xff, sc = strip(c), tcc--; count++; + if (rlogin != _POSIX_VDISABLE) { + if (bol) { + bol = 0; + if (sc == rlogin) { + local = 1; + continue; + } + } else if (local) { + local = 0; + if (sc == '.' || c == termEofChar) { + bol = 1; + command(0, "close\n", 6); + continue; + } + if (sc == termSuspChar) { + bol = 1; + command(0, "z\n", 2); + continue; + } + if (sc == escape) { + command(0, (char *)tbp, tcc); + bol = 1; + count += tcc; + tcc = 0; + flushline = 1; + break; + } + if (sc != rlogin) { + ++tcc; + --tbp; + --count; + c = sc = rlogin; + } + } + if ((sc == '\n') || (sc == '\r')) + bol = 1; + } else if (sc == escape) { + /* + * Double escape is a pass through of a single escape character. + */ + if (tcc && strip(*tbp) == escape) { + tbp++; + tcc--; + count++; + bol = 0; + } else { + command(0, (char *)tbp, tcc); + bol = 1; + count += tcc; + tcc = 0; + flushline = 1; + break; + } + } else + bol = 0; +#ifdef KLUDGELINEMODE + if (kludgelinemode && (globalmode&MODE_EDIT) && (sc == echoc)) { + if (tcc > 0 && strip(*tbp) == echoc) { + tcc--; tbp++; count++; + } else { + dontlecho = !dontlecho; + settimer(echotoggle); + setconnmode(0); + flushline = 1; + break; + } + } +#endif + if (MODE_LOCAL_CHARS(globalmode)) { + if (TerminalSpecialChars(sc) == 0) { + bol = 1; + break; + } + } + if (my_want_state_is_wont(TELOPT_BINARY)) { + switch (c) { + case '\n': + /* + * If we are in CRMOD mode (\r ==> \n) + * on our local machine, then probably + * a newline (unix) is CRLF (TELNET). + */ + if (MODE_LOCAL_CHARS(globalmode)) { + NETADD('\r'); + } + NETADD('\n'); + bol = flushline = 1; + break; + case '\r': + if (!crlf) { + NET2ADD('\r', '\0'); + } else { + NET2ADD('\r', '\n'); + } + bol = flushline = 1; + break; + case IAC: + NET2ADD(IAC, IAC); + break; + default: + NETADD(c); + break; + } + } else if (c == IAC) { + NET2ADD(IAC, IAC); + } else { + NETADD(c); + } + } + if (count) + ring_consumed(&ttyiring, count); + return returnValue||count; /* Non-zero if we did anything */ +} + +/* + * Scheduler() + * + * Try to do something. + * + * If we do something useful, return 1; else return 0. + * + */ + + + int +Scheduler(block) + int block; /* should we block in the select ? */ +{ + /* One wants to be a bit careful about setting returnValue + * to one, since a one implies we did some useful work, + * and therefore probably won't be called to block next + * time (TN3270 mode only). + */ + int returnValue; + int netin, netout, netex, ttyin, ttyout; + + /* Decide which rings should be processed */ + + netout = ring_full_count(&netoring) && + (flushline || + (my_want_state_is_wont(TELOPT_LINEMODE) +#ifdef KLUDGELINEMODE + && (!kludgelinemode || my_want_state_is_do(TELOPT_SGA)) +#endif + ) || + my_want_state_is_will(TELOPT_BINARY)); + ttyout = ring_full_count(&ttyoring); + +#if defined(TN3270) + ttyin = ring_empty_count(&ttyiring) && (shell_active == 0); +#else /* defined(TN3270) */ + ttyin = ring_empty_count(&ttyiring); +#endif /* defined(TN3270) */ + +#if defined(TN3270) + netin = ring_empty_count(&netiring); +# else /* !defined(TN3270) */ + netin = !ISend && ring_empty_count(&netiring); +# endif /* !defined(TN3270) */ + + netex = !SYNCHing; + + /* If we have seen a signal recently, reset things */ +# if defined(TN3270) && defined(unix) + if (HaveInput) { + HaveInput = 0; + (void) signal(SIGIO, inputAvailable); + } +#endif /* defined(TN3270) && defined(unix) */ + + /* Call to system code to process rings */ + + returnValue = process_rings(netin, netout, netex, ttyin, ttyout, !block); + + /* Now, look at the input rings, looking for work to do. */ + + if (ring_full_count(&ttyiring)) { +# if defined(TN3270) + if (In3270) { + int c; + + c = DataFromTerminal(ttyiring.consume, + ring_full_consecutive(&ttyiring)); + if (c) { + returnValue = 1; + ring_consumed(&ttyiring, c); + } + } else { +# endif /* defined(TN3270) */ + returnValue |= telsnd(); +# if defined(TN3270) + } +# endif /* defined(TN3270) */ + } + + if (ring_full_count(&netiring)) { +# if !defined(TN3270) + returnValue |= telrcv(); +# else /* !defined(TN3270) */ + returnValue = Push3270(); +# endif /* !defined(TN3270) */ + } + return returnValue; +} + +/* + * Select from tty and network... + */ + void +telnet(user) + char *user; +{ + sys_telnet_init(); + +#if defined(AUTHENTICATION) || defined(ENCRYPTION) + { + static char local_host[256] = { 0 }; + + if (!local_host[0]) { + gethostname(local_host, sizeof(local_host)); + local_host[sizeof(local_host)-1] = 0; + } + auth_encrypt_init(local_host, hostname, "TELNET", 0); + auth_encrypt_user(user); + } +#endif /* defined(AUTHENTICATION) || defined(ENCRYPTION) */ +# if !defined(TN3270) + if (telnetport) { +#if defined(AUTHENTICATION) + if (autologin) + send_will(TELOPT_AUTHENTICATION, 1); +#endif +#ifdef ENCRYPTION + send_do(TELOPT_ENCRYPT, 1); + send_will(TELOPT_ENCRYPT, 1); +#endif /* ENCRYPTION */ + send_do(TELOPT_SGA, 1); + send_will(TELOPT_TTYPE, 1); + send_will(TELOPT_NAWS, 1); + send_will(TELOPT_TSPEED, 1); + send_will(TELOPT_LFLOW, 1); + send_will(TELOPT_LINEMODE, 1); + send_will(TELOPT_NEW_ENVIRON, 1); + send_do(TELOPT_STATUS, 1); + if (env_getvalue((unsigned char *)"DISPLAY")) + send_will(TELOPT_XDISPLOC, 1); + if (eight) + tel_enter_binary(eight); + } +# endif /* !defined(TN3270) */ + +# if !defined(TN3270) + for (;;) { + int schedValue; + + while ((schedValue = Scheduler(0)) != 0) { + if (schedValue == -1) { + setcommandmode(); + return; + } + } + + if (Scheduler(1) == -1) { + setcommandmode(); + return; + } + } +# else /* !defined(TN3270) */ + for (;;) { + int schedValue; + + while (!In3270 && !shell_active) { + if (Scheduler(1) == -1) { + setcommandmode(); + return; + } + } + + while ((schedValue = Scheduler(0)) != 0) { + if (schedValue == -1) { + setcommandmode(); + return; + } + } + /* If there is data waiting to go out to terminal, don't + * schedule any more data for the terminal. + */ + if (ring_full_count(&ttyoring)) { + schedValue = 1; + } else { + if (shell_active) { + if (shell_continue() == 0) { + ConnectScreen(); + } + } else if (In3270) { + schedValue = DoTerminalOutput(); + } + } + if (schedValue && (shell_active == 0)) { + if (Scheduler(1) == -1) { + setcommandmode(); + return; + } + } + } +# endif /* !defined(TN3270) */ +} + +#if 0 /* XXX - this not being in is a bug */ +/* + * nextitem() + * + * Return the address of the next "item" in the TELNET data + * stream. This will be the address of the next character if + * the current address is a user data character, or it will + * be the address of the character following the TELNET command + * if the current address is a TELNET IAC ("I Am a Command") + * character. + */ + + static char * +nextitem(current) + char *current; +{ + if ((*current&0xff) != IAC) { + return current+1; + } + switch (*(current+1)&0xff) { + case DO: + case DONT: + case WILL: + case WONT: + return current+3; + case SB: /* loop forever looking for the SE */ + { + register char *look = current+2; + + for (;;) { + if ((*look++&0xff) == IAC) { + if ((*look++&0xff) == SE) { + return look; + } + } + } + } + default: + return current+2; + } +} +#endif /* 0 */ + +/* + * netclear() + * + * We are about to do a TELNET SYNCH operation. Clear + * the path to the network. + * + * Things are a bit tricky since we may have sent the first + * byte or so of a previous TELNET command into the network. + * So, we have to scan the network buffer from the beginning + * until we are up to where we want to be. + * + * A side effect of what we do, just to keep things + * simple, is to clear the urgent data pointer. The principal + * caller should be setting the urgent data pointer AFTER calling + * us in any case. + */ + + static void +netclear() +{ +#if 0 /* XXX */ + register char *thisitem, *next; + char *good; +#define wewant(p) ((nfrontp > p) && ((*p&0xff) == IAC) && \ + ((*(p+1)&0xff) != EC) && ((*(p+1)&0xff) != EL)) + + thisitem = netobuf; + + while ((next = nextitem(thisitem)) <= netobuf.send) { + thisitem = next; + } + + /* Now, thisitem is first before/at boundary. */ + + good = netobuf; /* where the good bytes go */ + + while (netoring.add > thisitem) { + if (wewant(thisitem)) { + int length; + + next = thisitem; + do { + next = nextitem(next); + } while (wewant(next) && (nfrontp > next)); + length = next-thisitem; + memmove(good, thisitem, length); + good += length; + thisitem = next; + } else { + thisitem = nextitem(thisitem); + } + } + +#endif /* 0 */ +} + +/* + * These routines add various telnet commands to the data stream. + */ + + static void +doflush() +{ + NET2ADD(IAC, DO); + NETADD(TELOPT_TM); + flushline = 1; + flushout = 1; + (void) ttyflush(1); /* Flush/drop output */ + /* do printoption AFTER flush, otherwise the output gets tossed... */ + printoption("SENT", DO, TELOPT_TM); +} + + void +xmitAO() +{ + NET2ADD(IAC, AO); + printoption("SENT", IAC, AO); + if (autoflush) { + doflush(); + } +} + + + void +xmitEL() +{ + NET2ADD(IAC, EL); + printoption("SENT", IAC, EL); +} + + void +xmitEC() +{ + NET2ADD(IAC, EC); + printoption("SENT", IAC, EC); +} + + + int +dosynch() +{ + netclear(); /* clear the path to the network */ + NETADD(IAC); + setneturg(); + NETADD(DM); + printoption("SENT", IAC, DM); + return 1; +} + +int want_status_response = 0; + + int +get_status() +{ + unsigned char tmp[16]; + register unsigned char *cp; + + if (my_want_state_is_dont(TELOPT_STATUS)) { + printf("Remote side does not support STATUS option\n"); + return 0; + } + cp = tmp; + + *cp++ = IAC; + *cp++ = SB; + *cp++ = TELOPT_STATUS; + *cp++ = TELQUAL_SEND; + *cp++ = IAC; + *cp++ = SE; + if (NETROOM() >= cp - tmp) { + ring_supply_data(&netoring, tmp, cp-tmp); + printsub('>', tmp+2, cp - tmp - 2); + } + ++want_status_response; + return 1; +} + + void +intp() +{ + NET2ADD(IAC, IP); + printoption("SENT", IAC, IP); + flushline = 1; + if (autoflush) { + doflush(); + } + if (autosynch) { + dosynch(); + } +} + + void +sendbrk() +{ + NET2ADD(IAC, BREAK); + printoption("SENT", IAC, BREAK); + flushline = 1; + if (autoflush) { + doflush(); + } + if (autosynch) { + dosynch(); + } +} + + void +sendabort() +{ + NET2ADD(IAC, ABORT); + printoption("SENT", IAC, ABORT); + flushline = 1; + if (autoflush) { + doflush(); + } + if (autosynch) { + dosynch(); + } +} + + void +sendsusp() +{ + NET2ADD(IAC, SUSP); + printoption("SENT", IAC, SUSP); + flushline = 1; + if (autoflush) { + doflush(); + } + if (autosynch) { + dosynch(); + } +} + + void +sendeof() +{ + NET2ADD(IAC, xEOF); + printoption("SENT", IAC, xEOF); +} + + void +sendayt() +{ + NET2ADD(IAC, AYT); + printoption("SENT", IAC, AYT); +} + +/* + * Send a window size update to the remote system. + */ + + void +sendnaws() +{ + long rows, cols; + unsigned char tmp[16]; + register unsigned char *cp; + + if (my_state_is_wont(TELOPT_NAWS)) + return; + +#define PUTSHORT(cp, x) { if ((*cp++ = ((x)>>8)&0xff) == IAC) *cp++ = IAC; \ + if ((*cp++ = ((x))&0xff) == IAC) *cp++ = IAC; } + + if (TerminalWindowSize(&rows, &cols) == 0) { /* Failed */ + return; + } + + cp = tmp; + + *cp++ = IAC; + *cp++ = SB; + *cp++ = TELOPT_NAWS; + PUTSHORT(cp, cols); + PUTSHORT(cp, rows); + *cp++ = IAC; + *cp++ = SE; + if (NETROOM() >= cp - tmp) { + ring_supply_data(&netoring, tmp, cp-tmp); + printsub('>', tmp+2, cp - tmp - 2); + } +} + + void +tel_enter_binary(rw) + int rw; +{ + if (rw&1) + send_do(TELOPT_BINARY, 1); + if (rw&2) + send_will(TELOPT_BINARY, 1); +} + + void +tel_leave_binary(rw) + int rw; +{ + if (rw&1) + send_dont(TELOPT_BINARY, 1); + if (rw&2) + send_wont(TELOPT_BINARY, 1); +} diff --git a/telnet/terminal.c b/telnet/terminal.c new file mode 100644 index 0000000..b5ceeda --- /dev/null +++ b/telnet/terminal.c @@ -0,0 +1,240 @@ +/* + * Copyright (c) 1988, 1990, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)terminal.c 8.2 (Berkeley) 2/16/95"; +#endif /* not lint */ + +#include +#include + +#include "ring.h" + +#include "externs.h" +#include "types.h" + +Ring ttyoring, ttyiring; +unsigned char ttyobuf[2*BUFSIZ], ttyibuf[BUFSIZ]; + +int termdata; /* Debugging flag */ + +#ifdef USE_TERMIO +# ifndef VDISCARD +cc_t termFlushChar; +# endif +# ifndef VLNEXT +cc_t termLiteralNextChar; +# endif +# ifndef VSUSP +cc_t termSuspChar; +# endif +# ifndef VWERASE +cc_t termWerasChar; +# endif +# ifndef VREPRINT +cc_t termRprntChar; +# endif +# ifndef VSTART +cc_t termStartChar; +# endif +# ifndef VSTOP +cc_t termStopChar; +# endif +# ifndef VEOL +cc_t termForw1Char; +# endif +# ifndef VEOL2 +cc_t termForw2Char; +# endif +# ifndef VSTATUS +cc_t termAytChar; +# endif +#else +cc_t termForw2Char; +cc_t termAytChar; +#endif + +/* + * initialize the terminal data structures. + */ + + void +init_terminal() +{ + if (ring_init(&ttyoring, ttyobuf, sizeof ttyobuf) != 1) { + exit(1); + } + if (ring_init(&ttyiring, ttyibuf, sizeof ttyibuf) != 1) { + exit(1); + } + autoflush = TerminalAutoFlush(); +} + + +/* + * Send as much data as possible to the terminal. + * + * Return value: + * -1: No useful work done, data waiting to go out. + * 0: No data was waiting, so nothing was done. + * 1: All waiting data was written out. + * n: All data - n was written out. + */ + + + int +ttyflush(drop) + int drop; +{ + register int n, n0, n1; + + n0 = ring_full_count(&ttyoring); + if ((n1 = n = ring_full_consecutive(&ttyoring)) > 0) { + if (drop) { + TerminalFlushOutput(); + /* we leave 'n' alone! */ + } else { + n = TerminalWrite(ttyoring.consume, n); + } + } + if (n > 0) { + if (termdata && n) { + Dump('>', ttyoring.consume, n); + } + /* + * If we wrote everything, and the full count is + * larger than what we wrote, then write the + * rest of the buffer. + */ + if (n1 == n && n0 > n) { + n1 = n0 - n; + if (!drop) + n1 = TerminalWrite(ttyoring.bottom, n1); + if (n1 > 0) + n += n1; + } + ring_consumed(&ttyoring, n); + } + if (n < 0) + return -1; + if (n == n0) { + if (n0) + return -1; + return 0; + } + return n0 - n + 1; +} + + +/* + * These routines decides on what the mode should be (based on the values + * of various global variables). + */ + + + int +getconnmode() +{ + extern int linemode; + int mode = 0; +#ifdef KLUDGELINEMODE + extern int kludgelinemode; +#endif + + if (In3270) + return(MODE_FLOW); + + if (my_want_state_is_dont(TELOPT_ECHO)) + mode |= MODE_ECHO; + + if (localflow) + mode |= MODE_FLOW; + + if (my_want_state_is_will(TELOPT_BINARY)) + mode |= MODE_INBIN; + + if (his_want_state_is_will(TELOPT_BINARY)) + mode |= MODE_OUTBIN; + +#ifdef KLUDGELINEMODE + if (kludgelinemode) { + if (my_want_state_is_dont(TELOPT_SGA)) { + mode |= (MODE_TRAPSIG|MODE_EDIT); + if (dontlecho && (clocks.echotoggle > clocks.modenegotiated)) { + mode &= ~MODE_ECHO; + } + } + return(mode); + } +#endif + if (my_want_state_is_will(TELOPT_LINEMODE)) + mode |= linemode; + return(mode); +} + + void +setconnmode(force) + int force; +{ +#ifdef ENCRYPTION + static int enc_passwd = 0; +#endif /* ENCRYPTION */ + register int newmode; + + newmode = getconnmode()|(force?MODE_FORCE:0); + + TerminalNewMode(newmode); + +#ifdef ENCRYPTION + if ((newmode & (MODE_ECHO|MODE_EDIT)) == MODE_EDIT) { + if (my_want_state_is_will(TELOPT_ENCRYPT) + && (enc_passwd == 0) && !encrypt_output) { + encrypt_request_start(0, 0); + enc_passwd = 1; + } + } else { + if (enc_passwd) { + encrypt_request_end(); + enc_passwd = 0; + } + } +#endif /* ENCRYPTION */ + +} + + + void +setcommandmode() +{ + TerminalNewMode(-1); +} diff --git a/telnet/tn3270.c b/telnet/tn3270.c new file mode 100644 index 0000000..a75cd1e --- /dev/null +++ b/telnet/tn3270.c @@ -0,0 +1,411 @@ +/* + * Copyright (c) 1988, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)tn3270.c 8.2 (Berkeley) 5/30/95"; +#endif /* not lint */ + +#include +#include + +#include "general.h" + +#include "defines.h" +#include "ring.h" +#include "externs.h" +#include "fdset.h" + +#if defined(TN3270) + +#include "../ctlr/screen.h" +#include "../general/globals.h" + +#include "../sys_curses/telextrn.h" +#include "../ctlr/externs.h" + +#if defined(unix) +int + HaveInput, /* There is input available to scan */ + cursesdata, /* Do we dump curses data? */ + sigiocount; /* Number of times we got a SIGIO */ + +char tline[200]; +char *transcom = 0; /* transparent mode command (default: none) */ +#endif /* defined(unix) */ + +char Ibuf[8*BUFSIZ], *Ifrontp, *Ibackp; + +static char sb_terminal[] = { IAC, SB, + TELOPT_TTYPE, TELQUAL_IS, + 'I', 'B', 'M', '-', '3', '2', '7', '8', '-', '2', + IAC, SE }; +#define SBTERMMODEL 13 + +static int + Sent3270TerminalType; /* Have we said we are a 3270? */ + +#endif /* defined(TN3270) */ + + + void +init_3270() +{ +#if defined(TN3270) +#if defined(unix) + HaveInput = 0; + sigiocount = 0; +#endif /* defined(unix) */ + Sent3270TerminalType = 0; + Ifrontp = Ibackp = Ibuf; + init_ctlr(); /* Initialize some things */ + init_keyboard(); + init_screen(); + init_system(); +#endif /* defined(TN3270) */ +} + + +#if defined(TN3270) + +/* + * DataToNetwork - queue up some data to go to network. If "done" is set, + * then when last byte is queued, we add on an IAC EOR sequence (so, + * don't call us with "done" until you want that done...) + * + * We actually do send all the data to the network buffer, since our + * only client needs for us to do that. + */ + + int +DataToNetwork(buffer, count, done) + register char *buffer; /* where the data is */ + register int count; /* how much to send */ + int done; /* is this the last of a logical block */ +{ + register int loop, c; + int origCount; + + origCount = count; + + while (count) { + /* If not enough room for EORs, IACs, etc., wait */ + if (NETROOM() < 6) { + fd_set o; + + FD_ZERO(&o); + netflush(); + while (NETROOM() < 6) { + FD_SET(net, &o); + (void) select(net+1, (fd_set *) 0, &o, (fd_set *) 0, + (struct timeval *) 0); + netflush(); + } + } + c = ring_empty_count(&netoring); + if (c > count) { + c = count; + } + loop = c; + while (loop) { + if (((unsigned char)*buffer) == IAC) { + break; + } + buffer++; + loop--; + } + if ((c = c-loop)) { + ring_supply_data(&netoring, buffer-c, c); + count -= c; + } + if (loop) { + NET2ADD(IAC, IAC); + count--; + buffer++; + } + } + + if (done) { + NET2ADD(IAC, EOR); + netflush(); /* try to move along as quickly as ... */ + } + return(origCount - count); +} + + +#if defined(unix) + void +inputAvailable(signo) + int signo; +{ + HaveInput = 1; + sigiocount++; +} +#endif /* defined(unix) */ + + void +outputPurge() +{ + (void) ttyflush(1); +} + + +/* + * The following routines are places where the various tn3270 + * routines make calls into telnet.c. + */ + +/* + * DataToTerminal - queue up some data to go to terminal. + * + * Note: there are people who call us and depend on our processing + * *all* the data at one time (thus the select). + */ + + int +DataToTerminal(buffer, count) + register char *buffer; /* where the data is */ + register int count; /* how much to send */ +{ + register int c; + int origCount; + + origCount = count; + + while (count) { + if (TTYROOM() == 0) { +#if defined(unix) + fd_set o; + + FD_ZERO(&o); +#endif /* defined(unix) */ + (void) ttyflush(0); + while (TTYROOM() == 0) { +#if defined(unix) + FD_SET(tout, &o); + (void) select(tout+1, (fd_set *) 0, &o, (fd_set *) 0, + (struct timeval *) 0); +#endif /* defined(unix) */ + (void) ttyflush(0); + } + } + c = TTYROOM(); + if (c > count) { + c = count; + } + ring_supply_data(&ttyoring, buffer, c); + count -= c; + buffer += c; + } + return(origCount); +} + + +/* + * Push3270 - Try to send data along the 3270 output (to screen) direction. + */ + + int +Push3270() +{ + int save = ring_full_count(&netiring); + + if (save) { + if (Ifrontp+save > Ibuf+sizeof Ibuf) { + if (Ibackp != Ibuf) { + memmove(Ibuf, Ibackp, Ifrontp-Ibackp); + Ifrontp -= (Ibackp-Ibuf); + Ibackp = Ibuf; + } + } + if (Ifrontp+save < Ibuf+sizeof Ibuf) { + (void)telrcv(); + } + } + return save != ring_full_count(&netiring); +} + + +/* + * Finish3270 - get the last dregs of 3270 data out to the terminal + * before quitting. + */ + + void +Finish3270() +{ + while (Push3270() || !DoTerminalOutput()) { +#if defined(unix) + HaveInput = 0; +#endif /* defined(unix) */ + ; + } +} + + +/* StringToTerminal - output a null terminated string to the terminal */ + + void +StringToTerminal(s) + char *s; +{ + int count; + + count = strlen(s); + if (count) { + (void) DataToTerminal(s, count); /* we know it always goes... */ + } +} + + +#if ((!defined(NOT43)) || defined(PUTCHAR)) +/* _putchar - output a single character to the terminal. This name is so that + * curses(3x) can call us to send out data. + */ + + void +_putchar(c) + char c; +{ +#if defined(sun) /* SunOS 4.0 bug */ + c &= 0x7f; +#endif /* defined(sun) */ + if (cursesdata) { + Dump('>', &c, 1); + } + if (!TTYROOM()) { + (void) DataToTerminal(&c, 1); + } else { + TTYADD(c); + } +} +#endif /* ((!defined(NOT43)) || defined(PUTCHAR)) */ + + void +SetIn3270() +{ + if (Sent3270TerminalType && my_want_state_is_will(TELOPT_BINARY) + && my_want_state_is_do(TELOPT_BINARY) && !donebinarytoggle) { + if (!In3270) { + In3270 = 1; + Init3270(); /* Initialize 3270 functions */ + /* initialize terminal key mapping */ + InitTerminal(); /* Start terminal going */ + setconnmode(0); + } + } else { + if (In3270) { + StopScreen(1); + In3270 = 0; + Stop3270(); /* Tell 3270 we aren't here anymore */ + setconnmode(0); + } + } +} + +/* + * tn3270_ttype() + * + * Send a response to a terminal type negotiation. + * + * Return '0' if no more responses to send; '1' if a response sent. + */ + + int +tn3270_ttype() +{ + /* + * Try to send a 3270 type terminal name. Decide which one based + * on the format of our screen, and (in the future) color + * capaiblities. + */ + InitTerminal(); /* Sets MaxNumberColumns, MaxNumberLines */ + if ((MaxNumberLines >= 24) && (MaxNumberColumns >= 80)) { + Sent3270TerminalType = 1; + if ((MaxNumberLines >= 27) && (MaxNumberColumns >= 132)) { + MaxNumberLines = 27; + MaxNumberColumns = 132; + sb_terminal[SBTERMMODEL] = '5'; + } else if (MaxNumberLines >= 43) { + MaxNumberLines = 43; + MaxNumberColumns = 80; + sb_terminal[SBTERMMODEL] = '4'; + } else if (MaxNumberLines >= 32) { + MaxNumberLines = 32; + MaxNumberColumns = 80; + sb_terminal[SBTERMMODEL] = '3'; + } else { + MaxNumberLines = 24; + MaxNumberColumns = 80; + sb_terminal[SBTERMMODEL] = '2'; + } + NumberLines = 24; /* before we start out... */ + NumberColumns = 80; + ScreenSize = NumberLines*NumberColumns; + if ((MaxNumberLines*MaxNumberColumns) > MAXSCREENSIZE) { + ExitString("Programming error: MAXSCREENSIZE too small.\n", + 1); + /*NOTREACHED*/ + } + printsub('>', sb_terminal+2, sizeof sb_terminal-2); + ring_supply_data(&netoring, sb_terminal, sizeof sb_terminal); + return 1; + } else { + return 0; + } +} + +#if defined(unix) + int +settranscom(argc, argv) + int argc; + char *argv[]; +{ + int i; + + if (argc == 1 && transcom) { + transcom = 0; + } + if (argc == 1) { + return 1; + } + transcom = tline; + (void) strcpy(transcom, argv[1]); + for (i = 2; i < argc; ++i) { + (void) strcat(transcom, " "); + (void) strcat(transcom, argv[i]); + } + return 1; +} +#endif /* defined(unix) */ + +#endif /* defined(TN3270) */ diff --git a/telnet/types.h b/telnet/types.h new file mode 100644 index 0000000..191d311 --- /dev/null +++ b/telnet/types.h @@ -0,0 +1,52 @@ +/* + * Copyright (c) 1988, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)types.h 8.1 (Berkeley) 6/6/93 + */ + +typedef struct { + char *modedescriptions; + char modetype; +} Modelist; + +extern Modelist modelist[]; + +typedef struct { + int + system, /* what the current time is */ + echotoggle, /* last time user entered echo character */ + modenegotiated, /* last time operating mode negotiated */ + didnetreceive, /* last time we read data from network */ + gotDM; /* when did we last see a data mark */ +} Clocks; + +extern Clocks clocks; diff --git a/telnet/utilities.c b/telnet/utilities.c new file mode 100644 index 0000000..06d08a4 --- /dev/null +++ b/telnet/utilities.c @@ -0,0 +1,939 @@ +/* + * Copyright (c) 1988, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)utilities.c 8.3 (Berkeley) 5/30/95"; +#endif /* not lint */ + +#define TELOPTS +#define TELCMDS +#define SLC_NAMES +#include +#include +#include + +#include + +#include "general.h" + +#include "fdset.h" + +#include "ring.h" + +#include "defines.h" + +#include "externs.h" + +FILE *NetTrace = 0; /* Not in bss, since needs to stay */ +int prettydump; + +/* + * upcase() + * + * Upcase (in place) the argument. + */ + + void +upcase(argument) + register char *argument; +{ + register int c; + + while ((c = *argument) != 0) { + if (islower(c)) { + *argument = toupper(c); + } + argument++; + } +} + +/* + * SetSockOpt() + * + * Compensate for differences in 4.2 and 4.3 systems. + */ + + int +SetSockOpt(fd, level, option, yesno) + int fd, level, option, yesno; +{ +#ifndef NOT43 + return setsockopt(fd, level, option, + (char *)&yesno, sizeof yesno); +#else /* NOT43 */ + if (yesno == 0) { /* Can't do that in 4.2! */ + fprintf(stderr, "Error: attempt to turn off an option 0x%x.\n", + option); + return -1; + } + return setsockopt(fd, level, option, 0, 0); +#endif /* NOT43 */ +} + +/* + * The following are routines used to print out debugging information. + */ + +unsigned char NetTraceFile[256] = "(standard output)"; + + void +SetNetTrace(file) + register char *file; +{ + if (NetTrace && NetTrace != stdout) + fclose(NetTrace); + if (file && (strcmp(file, "-") != 0)) { + NetTrace = fopen(file, "w"); + if (NetTrace) { + strcpy((char *)NetTraceFile, file); + return; + } + fprintf(stderr, "Cannot open %s.\n", file); + } + NetTrace = stdout; + strcpy((char *)NetTraceFile, "(standard output)"); +} + + void +Dump(direction, buffer, length) + char direction; + unsigned char *buffer; + int length; +{ +# define BYTES_PER_LINE 32 +# define min(x,y) ((x' */ + unsigned char *pointer; /* where suboption data sits */ + int length; /* length of suboption data */ +{ + register int i; + char buf[512]; + extern int want_status_response; + + if (showoptions || direction == 0 || + (want_status_response && (pointer[0] == TELOPT_STATUS))) { + if (direction) { + fprintf(NetTrace, "%s IAC SB ", + (direction == '<')? "RCVD":"SENT"); + if (length >= 3) { + register int j; + + i = pointer[length-2]; + j = pointer[length-1]; + + if (i != IAC || j != SE) { + fprintf(NetTrace, "(terminated by "); + if (TELOPT_OK(i)) + fprintf(NetTrace, "%s ", TELOPT(i)); + else if (TELCMD_OK(i)) + fprintf(NetTrace, "%s ", TELCMD(i)); + else + fprintf(NetTrace, "%d ", i); + if (TELOPT_OK(j)) + fprintf(NetTrace, "%s", TELOPT(j)); + else if (TELCMD_OK(j)) + fprintf(NetTrace, "%s", TELCMD(j)); + else + fprintf(NetTrace, "%d", j); + fprintf(NetTrace, ", not IAC SE!) "); + } + } + length -= 2; + } + if (length < 1) { + fprintf(NetTrace, "(Empty suboption??\?)"); + if (NetTrace == stdout) + fflush(NetTrace); + return; + } + switch (pointer[0]) { + case TELOPT_TTYPE: + fprintf(NetTrace, "TERMINAL-TYPE "); + switch (pointer[1]) { + case TELQUAL_IS: + fprintf(NetTrace, "IS \"%.*s\"", length-2, (char *)pointer+2); + break; + case TELQUAL_SEND: + fprintf(NetTrace, "SEND"); + break; + default: + fprintf(NetTrace, + "- unknown qualifier %d (0x%x).", + pointer[1], pointer[1]); + } + break; + case TELOPT_TSPEED: + fprintf(NetTrace, "TERMINAL-SPEED"); + if (length < 2) { + fprintf(NetTrace, " (empty suboption??\?)"); + break; + } + switch (pointer[1]) { + case TELQUAL_IS: + fprintf(NetTrace, " IS "); + fprintf(NetTrace, "%.*s", length-2, (char *)pointer+2); + break; + default: + if (pointer[1] == 1) + fprintf(NetTrace, " SEND"); + else + fprintf(NetTrace, " %d (unknown)", pointer[1]); + for (i = 2; i < length; i++) + fprintf(NetTrace, " ?%d?", pointer[i]); + break; + } + break; + + case TELOPT_LFLOW: + fprintf(NetTrace, "TOGGLE-FLOW-CONTROL"); + if (length < 2) { + fprintf(NetTrace, " (empty suboption??\?)"); + break; + } + switch (pointer[1]) { + case LFLOW_OFF: + fprintf(NetTrace, " OFF"); break; + case LFLOW_ON: + fprintf(NetTrace, " ON"); break; + case LFLOW_RESTART_ANY: + fprintf(NetTrace, " RESTART-ANY"); break; + case LFLOW_RESTART_XON: + fprintf(NetTrace, " RESTART-XON"); break; + default: + fprintf(NetTrace, " %d (unknown)", pointer[1]); + } + for (i = 2; i < length; i++) + fprintf(NetTrace, " ?%d?", pointer[i]); + break; + + case TELOPT_NAWS: + fprintf(NetTrace, "NAWS"); + if (length < 2) { + fprintf(NetTrace, " (empty suboption??\?)"); + break; + } + if (length == 2) { + fprintf(NetTrace, " ?%d?", pointer[1]); + break; + } + fprintf(NetTrace, " %d %d (%d)", + pointer[1], pointer[2], + (int)((((unsigned int)pointer[1])<<8)|((unsigned int)pointer[2]))); + if (length == 4) { + fprintf(NetTrace, " ?%d?", pointer[3]); + break; + } + fprintf(NetTrace, " %d %d (%d)", + pointer[3], pointer[4], + (int)((((unsigned int)pointer[3])<<8)|((unsigned int)pointer[4]))); + for (i = 5; i < length; i++) + fprintf(NetTrace, " ?%d?", pointer[i]); + break; + +#if defined(AUTHENTICATION) + case TELOPT_AUTHENTICATION: + fprintf(NetTrace, "AUTHENTICATION"); + if (length < 2) { + fprintf(NetTrace, " (empty suboption??\?)"); + break; + } + switch (pointer[1]) { + case TELQUAL_REPLY: + case TELQUAL_IS: + fprintf(NetTrace, " %s ", (pointer[1] == TELQUAL_IS) ? + "IS" : "REPLY"); + if (AUTHTYPE_NAME_OK(pointer[2])) + fprintf(NetTrace, "%s ", AUTHTYPE_NAME(pointer[2])); + else + fprintf(NetTrace, "%d ", pointer[2]); + if (length < 3) { + fprintf(NetTrace, "(partial suboption??\?)"); + break; + } + fprintf(NetTrace, "%s|%s", + ((pointer[3] & AUTH_WHO_MASK) == AUTH_WHO_CLIENT) ? + "CLIENT" : "SERVER", + ((pointer[3] & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) ? + "MUTUAL" : "ONE-WAY"); + + auth_printsub(&pointer[1], length - 1, buf, sizeof(buf)); + fprintf(NetTrace, "%s", buf); + break; + + case TELQUAL_SEND: + i = 2; + fprintf(NetTrace, " SEND "); + while (i < length) { + if (AUTHTYPE_NAME_OK(pointer[i])) + fprintf(NetTrace, "%s ", AUTHTYPE_NAME(pointer[i])); + else + fprintf(NetTrace, "%d ", pointer[i]); + if (++i >= length) { + fprintf(NetTrace, "(partial suboption??\?)"); + break; + } + fprintf(NetTrace, "%s|%s ", + ((pointer[i] & AUTH_WHO_MASK) == AUTH_WHO_CLIENT) ? + "CLIENT" : "SERVER", + ((pointer[i] & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) ? + "MUTUAL" : "ONE-WAY"); + ++i; + } + break; + + case TELQUAL_NAME: + i = 2; + fprintf(NetTrace, " NAME \""); + while (i < length) + putc(pointer[i++], NetTrace); + putc('"', NetTrace); + break; + + default: + for (i = 2; i < length; i++) + fprintf(NetTrace, " ?%d?", pointer[i]); + break; + } + break; +#endif + +#ifdef ENCRYPTION + case TELOPT_ENCRYPT: + fprintf(NetTrace, "ENCRYPT"); + if (length < 2) { + fprintf(NetTrace, " (empty suboption??\?)"); + break; + } + switch (pointer[1]) { + case ENCRYPT_START: + fprintf(NetTrace, " START"); + break; + + case ENCRYPT_END: + fprintf(NetTrace, " END"); + break; + + case ENCRYPT_REQSTART: + fprintf(NetTrace, " REQUEST-START"); + break; + + case ENCRYPT_REQEND: + fprintf(NetTrace, " REQUEST-END"); + break; + + case ENCRYPT_IS: + case ENCRYPT_REPLY: + fprintf(NetTrace, " %s ", (pointer[1] == ENCRYPT_IS) ? + "IS" : "REPLY"); + if (length < 3) { + fprintf(NetTrace, " (partial suboption??\?)"); + break; + } + if (ENCTYPE_NAME_OK(pointer[2])) + fprintf(NetTrace, "%s ", ENCTYPE_NAME(pointer[2])); + else + fprintf(NetTrace, " %d (unknown)", pointer[2]); + + encrypt_printsub(&pointer[1], length - 1, buf, sizeof(buf)); + fprintf(NetTrace, "%s", buf); + break; + + case ENCRYPT_SUPPORT: + i = 2; + fprintf(NetTrace, " SUPPORT "); + while (i < length) { + if (ENCTYPE_NAME_OK(pointer[i])) + fprintf(NetTrace, "%s ", ENCTYPE_NAME(pointer[i])); + else + fprintf(NetTrace, "%d ", pointer[i]); + i++; + } + break; + + case ENCRYPT_ENC_KEYID: + fprintf(NetTrace, " ENC_KEYID "); + goto encommon; + + case ENCRYPT_DEC_KEYID: + fprintf(NetTrace, " DEC_KEYID "); + goto encommon; + + default: + fprintf(NetTrace, " %d (unknown)", pointer[1]); + encommon: + for (i = 2; i < length; i++) + fprintf(NetTrace, " %d", pointer[i]); + break; + } + break; +#endif /* ENCRYPTION */ + + case TELOPT_LINEMODE: + fprintf(NetTrace, "LINEMODE "); + if (length < 2) { + fprintf(NetTrace, " (empty suboption??\?)"); + break; + } + switch (pointer[1]) { + case WILL: + fprintf(NetTrace, "WILL "); + goto common; + case WONT: + fprintf(NetTrace, "WONT "); + goto common; + case DO: + fprintf(NetTrace, "DO "); + goto common; + case DONT: + fprintf(NetTrace, "DONT "); + common: + if (length < 3) { + fprintf(NetTrace, "(no option??\?)"); + break; + } + switch (pointer[2]) { + case LM_FORWARDMASK: + fprintf(NetTrace, "Forward Mask"); + for (i = 3; i < length; i++) + fprintf(NetTrace, " %x", pointer[i]); + break; + default: + fprintf(NetTrace, "%d (unknown)", pointer[2]); + for (i = 3; i < length; i++) + fprintf(NetTrace, " %d", pointer[i]); + break; + } + break; + + case LM_SLC: + fprintf(NetTrace, "SLC"); + for (i = 2; i < length - 2; i += 3) { + if (SLC_NAME_OK(pointer[i+SLC_FUNC])) + fprintf(NetTrace, " %s", SLC_NAME(pointer[i+SLC_FUNC])); + else + fprintf(NetTrace, " %d", pointer[i+SLC_FUNC]); + switch (pointer[i+SLC_FLAGS]&SLC_LEVELBITS) { + case SLC_NOSUPPORT: + fprintf(NetTrace, " NOSUPPORT"); break; + case SLC_CANTCHANGE: + fprintf(NetTrace, " CANTCHANGE"); break; + case SLC_VARIABLE: + fprintf(NetTrace, " VARIABLE"); break; + case SLC_DEFAULT: + fprintf(NetTrace, " DEFAULT"); break; + } + fprintf(NetTrace, "%s%s%s", + pointer[i+SLC_FLAGS]&SLC_ACK ? "|ACK" : "", + pointer[i+SLC_FLAGS]&SLC_FLUSHIN ? "|FLUSHIN" : "", + pointer[i+SLC_FLAGS]&SLC_FLUSHOUT ? "|FLUSHOUT" : ""); + if (pointer[i+SLC_FLAGS]& ~(SLC_ACK|SLC_FLUSHIN| + SLC_FLUSHOUT| SLC_LEVELBITS)) + fprintf(NetTrace, "(0x%x)", pointer[i+SLC_FLAGS]); + fprintf(NetTrace, " %d;", pointer[i+SLC_VALUE]); + if ((pointer[i+SLC_VALUE] == IAC) && + (pointer[i+SLC_VALUE+1] == IAC)) + i++; + } + for (; i < length; i++) + fprintf(NetTrace, " ?%d?", pointer[i]); + break; + + case LM_MODE: + fprintf(NetTrace, "MODE "); + if (length < 3) { + fprintf(NetTrace, "(no mode??\?)"); + break; + } + { + char tbuf[64]; + sprintf(tbuf, "%s%s%s%s%s", + pointer[2]&MODE_EDIT ? "|EDIT" : "", + pointer[2]&MODE_TRAPSIG ? "|TRAPSIG" : "", + pointer[2]&MODE_SOFT_TAB ? "|SOFT_TAB" : "", + pointer[2]&MODE_LIT_ECHO ? "|LIT_ECHO" : "", + pointer[2]&MODE_ACK ? "|ACK" : ""); + fprintf(NetTrace, "%s", tbuf[1] ? &tbuf[1] : "0"); + } + if (pointer[2]&~(MODE_MASK)) + fprintf(NetTrace, " (0x%x)", pointer[2]); + for (i = 3; i < length; i++) + fprintf(NetTrace, " ?0x%x?", pointer[i]); + break; + default: + fprintf(NetTrace, "%d (unknown)", pointer[1]); + for (i = 2; i < length; i++) + fprintf(NetTrace, " %d", pointer[i]); + } + break; + + case TELOPT_STATUS: { + register char *cp; + register int j, k; + + fprintf(NetTrace, "STATUS"); + + switch (pointer[1]) { + default: + if (pointer[1] == TELQUAL_SEND) + fprintf(NetTrace, " SEND"); + else + fprintf(NetTrace, " %d (unknown)", pointer[1]); + for (i = 2; i < length; i++) + fprintf(NetTrace, " ?%d?", pointer[i]); + break; + case TELQUAL_IS: + if (--want_status_response < 0) + want_status_response = 0; + if (NetTrace == stdout) + fprintf(NetTrace, " IS\r\n"); + else + fprintf(NetTrace, " IS\n"); + + for (i = 2; i < length; i++) { + switch(pointer[i]) { + case DO: cp = "DO"; goto common2; + case DONT: cp = "DONT"; goto common2; + case WILL: cp = "WILL"; goto common2; + case WONT: cp = "WONT"; goto common2; + common2: + i++; + if (TELOPT_OK((int)pointer[i])) + fprintf(NetTrace, " %s %s", cp, TELOPT(pointer[i])); + else + fprintf(NetTrace, " %s %d", cp, pointer[i]); + + if (NetTrace == stdout) + fprintf(NetTrace, "\r\n"); + else + fprintf(NetTrace, "\n"); + break; + + case SB: + fprintf(NetTrace, " SB "); + i++; + j = k = i; + while (j < length) { + if (pointer[j] == SE) { + if (j+1 == length) + break; + if (pointer[j+1] == SE) + j++; + else + break; + } + pointer[k++] = pointer[j++]; + } + printsub(0, &pointer[i], k - i); + if (i < length) { + fprintf(NetTrace, " SE"); + i = j; + } else + i = j - 1; + + if (NetTrace == stdout) + fprintf(NetTrace, "\r\n"); + else + fprintf(NetTrace, "\n"); + + break; + + default: + fprintf(NetTrace, " %d", pointer[i]); + break; + } + } + break; + } + break; + } + + case TELOPT_XDISPLOC: + fprintf(NetTrace, "X-DISPLAY-LOCATION "); + switch (pointer[1]) { + case TELQUAL_IS: + fprintf(NetTrace, "IS \"%.*s\"", length-2, (char *)pointer+2); + break; + case TELQUAL_SEND: + fprintf(NetTrace, "SEND"); + break; + default: + fprintf(NetTrace, "- unknown qualifier %d (0x%x).", + pointer[1], pointer[1]); + } + break; + + case TELOPT_NEW_ENVIRON: + fprintf(NetTrace, "NEW-ENVIRON "); +#ifdef OLD_ENVIRON + goto env_common1; + case TELOPT_OLD_ENVIRON: + fprintf(NetTrace, "OLD-ENVIRON"); + env_common1: +#endif + switch (pointer[1]) { + case TELQUAL_IS: + fprintf(NetTrace, "IS "); + goto env_common; + case TELQUAL_SEND: + fprintf(NetTrace, "SEND "); + goto env_common; + case TELQUAL_INFO: + fprintf(NetTrace, "INFO "); + env_common: + { + register int noquote = 2; +#if defined(ENV_HACK) && defined(OLD_ENVIRON) + extern int old_env_var, old_env_value; +#endif + for (i = 2; i < length; i++ ) { + switch (pointer[i]) { + case NEW_ENV_VALUE: +#ifdef OLD_ENVIRON + /* case NEW_ENV_OVAR: */ + if (pointer[0] == TELOPT_OLD_ENVIRON) { +# ifdef ENV_HACK + if (old_env_var == OLD_ENV_VALUE) + fprintf(NetTrace, "\" (VALUE) " + noquote); + else +# endif + fprintf(NetTrace, "\" VAR " + noquote); + } else +#endif /* OLD_ENVIRON */ + fprintf(NetTrace, "\" VALUE " + noquote); + noquote = 2; + break; + + case NEW_ENV_VAR: +#ifdef OLD_ENVIRON + /* case OLD_ENV_VALUE: */ + if (pointer[0] == TELOPT_OLD_ENVIRON) { +# ifdef ENV_HACK + if (old_env_value == OLD_ENV_VAR) + fprintf(NetTrace, "\" (VAR) " + noquote); + else +# endif + fprintf(NetTrace, "\" VALUE " + noquote); + } else +#endif /* OLD_ENVIRON */ + fprintf(NetTrace, "\" VAR " + noquote); + noquote = 2; + break; + + case ENV_ESC: + fprintf(NetTrace, "\" ESC " + noquote); + noquote = 2; + break; + + case ENV_USERVAR: + fprintf(NetTrace, "\" USERVAR " + noquote); + noquote = 2; + break; + + default: + def_case: + if (isprint(pointer[i]) && pointer[i] != '"') { + if (noquote) { + putc('"', NetTrace); + noquote = 0; + } + putc(pointer[i], NetTrace); + } else { + fprintf(NetTrace, "\" %03o " + noquote, + pointer[i]); + noquote = 2; + } + break; + } + } + if (!noquote) + putc('"', NetTrace); + break; + } + } + break; + + default: + if (TELOPT_OK(pointer[0])) + fprintf(NetTrace, "%s (unknown)", TELOPT(pointer[0])); + else + fprintf(NetTrace, "%d (unknown)", pointer[0]); + for (i = 1; i < length; i++) + fprintf(NetTrace, " %d", pointer[i]); + break; + } + if (direction) { + if (NetTrace == stdout) + fprintf(NetTrace, "\r\n"); + else + fprintf(NetTrace, "\n"); + } + if (NetTrace == stdout) + fflush(NetTrace); + } +} + +/* EmptyTerminal - called to make sure that the terminal buffer is empty. + * Note that we consider the buffer to run all the + * way to the kernel (thus the select). + */ + + void +EmptyTerminal() +{ +#if defined(unix) + fd_set o; + + FD_ZERO(&o); +#endif /* defined(unix) */ + + if (TTYBYTES() == 0) { +#if defined(unix) + FD_SET(tout, &o); + (void) select(tout+1, (fd_set *) 0, &o, (fd_set *) 0, + (struct timeval *) 0); /* wait for TTLOWAT */ +#endif /* defined(unix) */ + } else { + while (TTYBYTES()) { + (void) ttyflush(0); +#if defined(unix) + FD_SET(tout, &o); + (void) select(tout+1, (fd_set *) 0, &o, (fd_set *) 0, + (struct timeval *) 0); /* wait for TTLOWAT */ +#endif /* defined(unix) */ + } + } +} + + void +SetForExit() +{ + setconnmode(0); +#if defined(TN3270) + if (In3270) { + Finish3270(); + } +#else /* defined(TN3270) */ + do { + (void)telrcv(); /* Process any incoming data */ + EmptyTerminal(); + } while (ring_full_count(&netiring)); /* While there is any */ +#endif /* defined(TN3270) */ + setcommandmode(); + fflush(stdout); + fflush(stderr); +#if defined(TN3270) + if (In3270) { + StopScreen(1); + } +#endif /* defined(TN3270) */ + setconnmode(0); + EmptyTerminal(); /* Flush the path to the tty */ + setcommandmode(); +} + + void +Exit(returnCode) + int returnCode; +{ + SetForExit(); + exit(returnCode); +} + + void +ExitString(string, returnCode) + char *string; + int returnCode; +{ + SetForExit(); + fwrite(string, 1, strlen(string), stderr); + exit(returnCode); +} diff --git a/telnetd/authenc.c b/telnetd/authenc.c new file mode 100644 index 0000000..ccb463c --- /dev/null +++ b/telnetd/authenc.c @@ -0,0 +1,91 @@ +/*- + * Copyright (c) 1991, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)authenc.c 8.2 (Berkeley) 5/30/95"; +#endif /* not lint */ + +#if defined(AUTHENTICATION) || defined(ENCRYPTION) +#include "telnetd.h" +#include + + int +net_write(str, len) + unsigned char *str; + int len; +{ + if (nfrontp + len < netobuf + BUFSIZ) { + memmove((void *)nfrontp, (void *)str, len); + nfrontp += len; + return(len); + } + return(0); +} + + void +net_encrypt() +{ +#ifdef ENCRYPTION + char *s = (nclearto > nbackp) ? nclearto : nbackp; + if (s < nfrontp && encrypt_output) { + (*encrypt_output)((unsigned char *)s, nfrontp - s); + } + nclearto = nfrontp; +#endif /* ENCRYPTION */ +} + + int +telnet_spin() +{ + ttloop(); + return(0); +} + + char * +telnet_getenv(val) + char *val; +{ + extern char *getenv(); + return(getenv(val)); +} + + char * +telnet_gets(prompt, result, length, echo) + char *prompt; + char *result; + int length; + int echo; +{ + return((char *)0); +} +#endif /* defined(AUTHENTICATION) || defined(ENCRYPTION) */ diff --git a/telnetd/defs.h b/telnetd/defs.h new file mode 100644 index 0000000..a73d4a6 --- /dev/null +++ b/telnetd/defs.h @@ -0,0 +1,296 @@ +/* + * Copyright (c) 1989, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)defs.h 8.1 (Berkeley) 6/4/93 + */ + +/* + * Telnet server defines + */ +#include +#include + +#ifndef BSD +# define BSD 43 +#endif + +#if defined(CRAY) && !defined(LINEMODE) +# define SYSV_TERMIO +# define LINEMODE +# define KLUDGELINEMODE +# define DIAGNOSTICS +# if defined(UNICOS50) && !defined(UNICOS5) +# define UNICOS5 +# endif +# if !defined(UNICOS5) +# define BFTPDAEMON +# define HAS_IP_TOS +# endif +#endif /* CRAY */ +#if defined(UNICOS5) && !defined(NO_SETSID) +# define NO_SETSID +#endif + +#if defined(PRINTOPTIONS) && defined(DIAGNOSTICS) +#define TELOPTS +#define TELCMDS +#define SLC_NAMES +#endif + +#if defined(SYSV_TERMIO) && !defined(USE_TERMIO) +# define USE_TERMIO +#endif + +#include +#ifndef CRAY +#include +#endif /* CRAY */ +#include +#include +#include +#include +#ifndef FILIO_H +#include +#else +#include +#endif + +#include + +#include + +#include +#ifdef __STDC__ +#include +#endif +#include +#include +#include +#include +#ifndef LOG_DAEMON +#define LOG_DAEMON 0 +#endif +#ifndef LOG_ODELAY +#define LOG_ODELAY 0 +#endif +#include +#ifndef NO_STRING_H +#include +#else +#include +#endif + +#ifndef USE_TERMIO +#include +#else +# ifdef SYSV_TERMIO +# include +# else +# include +# endif +#endif +#if !defined(USE_TERMIO) || defined(NO_CC_T) +typedef unsigned char cc_t; +#endif + +#ifdef __STDC__ +#include +#endif + +#ifndef _POSIX_VDISABLE +# ifdef VDISABLE +# define _POSIX_VDISABLE VDISABLE +# else +# define _POSIX_VDISABLE ((unsigned char)'\377') +# endif +#endif + + +#ifdef CRAY +# ifdef CRAY1 +# include +# ifndef FD_ZERO +# include +# endif /* FD_ZERO */ +# endif /* CRAY1 */ + +#include +#endif /* CRAY */ + +#ifdef __hpux +#include +#endif + +#if !defined(TIOCSCTTY) && defined(TCSETCTTY) +# define TIOCSCTTY TCSETCTTY +#endif + +#ifndef FD_SET +#ifndef HAVE_fd_set +typedef struct fd_set { int fds_bits[1]; } fd_set; +#endif + +#define FD_SET(n, p) ((p)->fds_bits[0] |= (1<<(n))) +#define FD_CLR(n, p) ((p)->fds_bits[0] &= ~(1<<(n))) +#define FD_ISSET(n, p) ((p)->fds_bits[0] & (1<<(n))) +#define FD_ZERO(p) ((p)->fds_bits[0] = 0) +#endif /* FD_SET */ + +/* + * I/O data buffers defines + */ +#define NETSLOP 64 +#ifdef CRAY +#undef BUFSIZ +#define BUFSIZ 2048 +#endif + +#define NIACCUM(c) { *netip++ = c; \ + ncc++; \ + } + +/* clock manipulations */ +#define settimer(x) (clocks.x = ++clocks.system) +#define sequenceIs(x,y) (clocks.x < clocks.y) + +/* + * Linemode support states, in decreasing order of importance + */ +#define REAL_LINEMODE 0x04 +#define KLUDGE_OK 0x03 +#define NO_AUTOKLUDGE 0x02 +#define KLUDGE_LINEMODE 0x01 +#define NO_LINEMODE 0x00 + +/* + * Structures of information for each special character function. + */ +typedef struct { + unsigned char flag; /* the flags for this function */ + cc_t val; /* the value of the special character */ +} slcent, *Slcent; + +typedef struct { + slcent defset; /* the default settings */ + slcent current; /* the current settings */ + cc_t *sptr; /* a pointer to the char in */ + /* system data structures */ +} slcfun, *Slcfun; + +#ifdef DIAGNOSTICS +/* + * Diagnostics capabilities + */ +#define TD_REPORT 0x01 /* Report operations to client */ +#define TD_EXERCISE 0x02 /* Exercise client's implementation */ +#define TD_NETDATA 0x04 /* Display received data stream */ +#define TD_PTYDATA 0x08 /* Display data passed to pty */ +#define TD_OPTIONS 0x10 /* Report just telnet options */ +#endif /* DIAGNOSTICS */ + +/* + * We keep track of each side of the option negotiation. + */ + +#define MY_STATE_WILL 0x01 +#define MY_WANT_STATE_WILL 0x02 +#define MY_STATE_DO 0x04 +#define MY_WANT_STATE_DO 0x08 + +/* + * Macros to check the current state of things + */ + +#define my_state_is_do(opt) (options[opt]&MY_STATE_DO) +#define my_state_is_will(opt) (options[opt]&MY_STATE_WILL) +#define my_want_state_is_do(opt) (options[opt]&MY_WANT_STATE_DO) +#define my_want_state_is_will(opt) (options[opt]&MY_WANT_STATE_WILL) + +#define my_state_is_dont(opt) (!my_state_is_do(opt)) +#define my_state_is_wont(opt) (!my_state_is_will(opt)) +#define my_want_state_is_dont(opt) (!my_want_state_is_do(opt)) +#define my_want_state_is_wont(opt) (!my_want_state_is_will(opt)) + +#define set_my_state_do(opt) (options[opt] |= MY_STATE_DO) +#define set_my_state_will(opt) (options[opt] |= MY_STATE_WILL) +#define set_my_want_state_do(opt) (options[opt] |= MY_WANT_STATE_DO) +#define set_my_want_state_will(opt) (options[opt] |= MY_WANT_STATE_WILL) + +#define set_my_state_dont(opt) (options[opt] &= ~MY_STATE_DO) +#define set_my_state_wont(opt) (options[opt] &= ~MY_STATE_WILL) +#define set_my_want_state_dont(opt) (options[opt] &= ~MY_WANT_STATE_DO) +#define set_my_want_state_wont(opt) (options[opt] &= ~MY_WANT_STATE_WILL) + +/* + * Tricky code here. What we want to know is if the MY_STATE_WILL + * and MY_WANT_STATE_WILL bits have the same value. Since the two + * bits are adjacent, a little arithmatic will show that by adding + * in the lower bit, the upper bit will be set if the two bits were + * different, and clear if they were the same. + */ +#define my_will_wont_is_changing(opt) \ + ((options[opt]+MY_STATE_WILL) & MY_WANT_STATE_WILL) + +#define my_do_dont_is_changing(opt) \ + ((options[opt]+MY_STATE_DO) & MY_WANT_STATE_DO) + +/* + * Make everything symetrical + */ + +#define HIS_STATE_WILL MY_STATE_DO +#define HIS_WANT_STATE_WILL MY_WANT_STATE_DO +#define HIS_STATE_DO MY_STATE_WILL +#define HIS_WANT_STATE_DO MY_WANT_STATE_WILL + +#define his_state_is_do my_state_is_will +#define his_state_is_will my_state_is_do +#define his_want_state_is_do my_want_state_is_will +#define his_want_state_is_will my_want_state_is_do + +#define his_state_is_dont my_state_is_wont +#define his_state_is_wont my_state_is_dont +#define his_want_state_is_dont my_want_state_is_wont +#define his_want_state_is_wont my_want_state_is_dont + +#define set_his_state_do set_my_state_will +#define set_his_state_will set_my_state_do +#define set_his_want_state_do set_my_want_state_will +#define set_his_want_state_will set_my_want_state_do + +#define set_his_state_dont set_my_state_wont +#define set_his_state_wont set_my_state_dont +#define set_his_want_state_dont set_my_want_state_wont +#define set_his_want_state_wont set_my_want_state_dont + +#define his_will_wont_is_changing my_do_dont_is_changing +#define his_do_dont_is_changing my_will_wont_is_changing diff --git a/telnetd/ext.h b/telnetd/ext.h new file mode 100644 index 0000000..19bc0d6 --- /dev/null +++ b/telnetd/ext.h @@ -0,0 +1,240 @@ +/* + * Copyright (c) 1989, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)ext.h 8.2 (Berkeley) 12/15/93 + */ + +/* + * Telnet server variable declarations + */ +extern char options[256]; +extern char do_dont_resp[256]; +extern char will_wont_resp[256]; +extern int linemode; /* linemode on/off */ +#ifdef LINEMODE +extern int uselinemode; /* what linemode to use (on/off) */ +extern int editmode; /* edit modes in use */ +extern int useeditmode; /* edit modes to use */ +extern int alwayslinemode; /* command line option */ +# ifdef KLUDGELINEMODE +extern int lmodetype; /* Client support for linemode */ +# endif /* KLUDGELINEMODE */ +#endif /* LINEMODE */ +extern int flowmode; /* current flow control state */ +extern int restartany; /* restart output on any character state */ +#ifdef DIAGNOSTICS +extern int diagnostic; /* telnet diagnostic capabilities */ +#endif /* DIAGNOSTICS */ +#ifdef BFTPDAEMON +extern int bftpd; /* behave as bftp daemon */ +#endif /* BFTPDAEMON */ +#if defined(SecurID) +extern int require_SecurID; +#endif +#if defined(AUTHENTICATION) +extern int auth_level; +#endif + +extern slcfun slctab[NSLC + 1]; /* slc mapping table */ + +char *terminaltype; + +/* + * I/O data buffers, pointers, and counters. + */ +extern char ptyobuf[BUFSIZ+NETSLOP], *pfrontp, *pbackp; + +extern char netibuf[BUFSIZ], *netip; + +extern char netobuf[BUFSIZ+NETSLOP], *nfrontp, *nbackp; +extern char *neturg; /* one past last bye of urgent data */ + +extern int pcc, ncc; + +#if defined(CRAY2) && defined(UNICOS5) +extern int unpcc; /* characters left unprocessed by CRAY-2 terminal routine */ +extern char *unptyip; /* pointer to remaining characters in buffer */ +#endif + +extern int pty, net; +extern char *line; +extern int SYNCHing; /* we are in TELNET SYNCH mode */ + +#ifndef P +# ifdef __STDC__ +# define P(x) x +# else +# define P(x) () +# endif +#endif + +extern void + _termstat P((void)), + add_slc P((int, int, int)), + check_slc P((void)), + change_slc P((int, int, int)), + cleanup P((int)), + clientstat P((int, int, int)), + copy_termbuf P((char *, int)), + deferslc P((void)), + defer_terminit P((void)), + do_opt_slc P((unsigned char *, int)), + doeof P((void)), + dooption P((int)), + dontoption P((int)), + edithost P((char *, char *)), + fatal P((int, char *)), + fatalperror P((int, char *)), + get_slc_defaults P((void)), + init_env P((void)), + init_termbuf P((void)), + interrupt P((void)), + localstat P((void)), + flowstat P((void)), + netclear P((void)), + netflush P((void)), +#ifdef DIAGNOSTICS + printoption P((char *, int)), + printdata P((char *, char *, int)), + printsub P((int, unsigned char *, int)), +#endif + ptyflush P((void)), + putchr P((int)), + putf P((char *, char *)), + recv_ayt P((void)), + send_do P((int, int)), + send_dont P((int, int)), + send_slc P((void)), + send_status P((void)), + send_will P((int, int)), + send_wont P((int, int)), + sendbrk P((void)), + sendsusp P((void)), + set_termbuf P((void)), + start_login P((char *, int, char *)), + start_slc P((int)), +#if defined(AUTHENTICATION) + start_slave P((char *)), +#else + start_slave P((char *, int, char *)), +#endif + suboption P((void)), + telrcv P((void)), + ttloop P((void)), + tty_binaryin P((int)), + tty_binaryout P((int)); + +extern int + end_slc P((unsigned char **)), + getnpty P((void)), +#ifndef convex + getpty P((int *)), +#endif + login_tty P((int)), + spcset P((int, cc_t *, cc_t **)), + stilloob P((int)), + terminit P((void)), + termstat P((void)), + tty_flowmode P((void)), + tty_restartany P((void)), + tty_isbinaryin P((void)), + tty_isbinaryout P((void)), + tty_iscrnl P((void)), + tty_isecho P((void)), + tty_isediting P((void)), + tty_islitecho P((void)), + tty_isnewmap P((void)), + tty_israw P((void)), + tty_issofttab P((void)), + tty_istrapsig P((void)), + tty_linemode P((void)); + +extern void + tty_rspeed P((int)), + tty_setecho P((int)), + tty_setedit P((int)), + tty_setlinemode P((int)), + tty_setlitecho P((int)), + tty_setsig P((int)), + tty_setsofttab P((int)), + tty_tspeed P((int)), + willoption P((int)), + wontoption P((int)), + writenet P((unsigned char *, int)); + +#ifdef ENCRYPTION +extern void (*encrypt_output) P((unsigned char *, int)); +extern int (*decrypt_input) P((int)); +extern char *nclearto; +#endif /* ENCRYPTION */ + + +/* + * The following are some clocks used to decide how to interpret + * the relationship between various variables. + */ + +extern struct { + int + system, /* what the current time is */ + echotoggle, /* last time user entered echo character */ + modenegotiated, /* last time operating mode negotiated */ + didnetreceive, /* last time we read data from network */ + ttypesubopt, /* ttype subopt is received */ + tspeedsubopt, /* tspeed subopt is received */ + environsubopt, /* environ subopt is received */ + oenvironsubopt, /* old environ subopt is received */ + xdisplocsubopt, /* xdisploc subopt is received */ + baseline, /* time started to do timed action */ + gotDM; /* when did we last see a data mark */ +} clocks; + + +#if defined(CRAY2) && defined(UNICOS5) +extern int needtermstat; +#endif + +#ifndef DEFAULT_IM +# ifdef CRAY +# define DEFAULT_IM "\r\n\r\nCray UNICOS (%h) (%t)\r\n\r\r\n\r" +# else +# ifdef sun +# define DEFAULT_IM "\r\n\r\nSunOS UNIX (%h) (%t)\r\n\r\r\n\r" +# else +# ifdef ultrix +# define DEFAULT_IM "\r\n\r\nULTRIX (%h) (%t)\r\n\r\r\n\r" +# else +# define DEFAULT_IM "\r\n\r\n4.4 BSD UNIX (%h) (%t)\r\n\r\r\n\r" +# endif +# endif +# endif +#endif diff --git a/telnetd/global.c b/telnetd/global.c new file mode 100644 index 0000000..af21acc --- /dev/null +++ b/telnetd/global.c @@ -0,0 +1,48 @@ +/* + * Copyright (c) 1989, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)global.c 8.1 (Berkeley) 6/4/93"; +#endif /* not lint */ + +/* + * Allocate global variables. We do this + * by including the header file that defines + * them all as externs, but first we define + * the keyword "extern" to be nothing, so that + * we will actually allocate the space. + */ + +#include "defs.h" +#define extern +#include "ext.h" diff --git a/telnetd/pathnames.h b/telnetd/pathnames.h new file mode 100644 index 0000000..c8b0806 --- /dev/null +++ b/telnetd/pathnames.h @@ -0,0 +1,55 @@ +/* + * Copyright (c) 1989, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)pathnames.h 8.1 (Berkeley) 6/4/93 + */ + +#if BSD > 43 + +# include + +# ifndef _PATH_LOGIN +# define _PATH_LOGIN "/usr/bin/login" +# endif + +#else + +# define _PATH_TTY "/dev/tty" +# ifndef _PATH_LOGIN +# define _PATH_LOGIN "/bin/login" +# endif + +#endif + +#ifdef BFTPDAEMON +#define BFTPPATH "/usr/ucb/bftp" +#endif /* BFTPDAEMON */ diff --git a/telnetd/slc.c b/telnetd/slc.c new file mode 100644 index 0000000..6cbb7ab --- /dev/null +++ b/telnetd/slc.c @@ -0,0 +1,491 @@ +/* + * Copyright (c) 1989, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)slc.c 8.2 (Berkeley) 5/30/95"; +#endif /* not lint */ + +#include "telnetd.h" + +#ifdef LINEMODE +/* + * local varibles + */ +static unsigned char *def_slcbuf = (unsigned char *)0; +static int def_slclen = 0; +static int slcchange; /* change to slc is requested */ +static unsigned char *slcptr; /* pointer into slc buffer */ +static unsigned char slcbuf[NSLC*6]; /* buffer for slc negotiation */ + +/* + * send_slc + * + * Write out the current special characters to the client. + */ + void +send_slc() +{ + register int i; + + /* + * Send out list of triplets of special characters + * to client. We only send info on the characters + * that are currently supported. + */ + for (i = 1; i <= NSLC; i++) { + if ((slctab[i].defset.flag & SLC_LEVELBITS) == SLC_NOSUPPORT) + continue; + add_slc((unsigned char)i, slctab[i].current.flag, + slctab[i].current.val); + } + +} /* end of send_slc */ + +/* + * default_slc + * + * Set pty special characters to all the defaults. + */ + void +default_slc() +{ + register int i; + + for (i = 1; i <= NSLC; i++) { + slctab[i].current.val = slctab[i].defset.val; + if (slctab[i].current.val == (cc_t)(_POSIX_VDISABLE)) + slctab[i].current.flag = SLC_NOSUPPORT; + else + slctab[i].current.flag = slctab[i].defset.flag; + if (slctab[i].sptr) { + *(slctab[i].sptr) = slctab[i].defset.val; + } + } + slcchange = 1; + +} /* end of default_slc */ +#endif /* LINEMODE */ + +/* + * get_slc_defaults + * + * Initialize the slc mapping table. + */ + void +get_slc_defaults() +{ + register int i; + + init_termbuf(); + + for (i = 1; i <= NSLC; i++) { + slctab[i].defset.flag = + spcset(i, &slctab[i].defset.val, &slctab[i].sptr); + slctab[i].current.flag = SLC_NOSUPPORT; + slctab[i].current.val = 0; + } + +} /* end of get_slc_defaults */ + +#ifdef LINEMODE +/* + * add_slc + * + * Add an slc triplet to the slc buffer. + */ + void +add_slc(func, flag, val) + register char func, flag; + register cc_t val; +{ + + if ((*slcptr++ = (unsigned char)func) == 0xff) + *slcptr++ = 0xff; + + if ((*slcptr++ = (unsigned char)flag) == 0xff) + *slcptr++ = 0xff; + + if ((*slcptr++ = (unsigned char)val) == 0xff) + *slcptr++ = 0xff; + +} /* end of add_slc */ + +/* + * start_slc + * + * Get ready to process incoming slc's and respond to them. + * + * The parameter getit is non-zero if it is necessary to grab a copy + * of the terminal control structures. + */ + void +start_slc(getit) + register int getit; +{ + + slcchange = 0; + if (getit) + init_termbuf(); + (void) sprintf((char *)slcbuf, "%c%c%c%c", + IAC, SB, TELOPT_LINEMODE, LM_SLC); + slcptr = slcbuf + 4; + +} /* end of start_slc */ + +/* + * end_slc + * + * Finish up the slc negotiation. If something to send, then send it. + */ + int +end_slc(bufp) + register unsigned char **bufp; +{ + register int len; + void netflush(); + + /* + * If a change has occured, store the new terminal control + * structures back to the terminal driver. + */ + if (slcchange) { + set_termbuf(); + } + + /* + * If the pty state has not yet been fully processed and there is a + * deferred slc request from the client, then do not send any + * sort of slc negotiation now. We will respond to the client's + * request very soon. + */ + if (def_slcbuf && (terminit() == 0)) { + return(0); + } + + if (slcptr > (slcbuf + 4)) { + if (bufp) { + *bufp = &slcbuf[4]; + return(slcptr - slcbuf - 4); + } else { + (void) sprintf((char *)slcptr, "%c%c", IAC, SE); + slcptr += 2; + len = slcptr - slcbuf; + writenet(slcbuf, len); + netflush(); /* force it out immediately */ + DIAG(TD_OPTIONS, printsub('>', slcbuf+2, len-2);); + } + } + return (0); + +} /* end of end_slc */ + +/* + * process_slc + * + * Figure out what to do about the client's slc + */ + void +process_slc(func, flag, val) + register unsigned char func, flag; + register cc_t val; +{ + register int hislevel, mylevel, ack; + + /* + * Ensure that we know something about this function + */ + if (func > NSLC) { + add_slc(func, SLC_NOSUPPORT, 0); + return; + } + + /* + * Process the special case requests of 0 SLC_DEFAULT 0 + * and 0 SLC_VARIABLE 0. Be a little forgiving here, don't + * worry about whether the value is actually 0 or not. + */ + if (func == 0) { + if ((flag = flag & SLC_LEVELBITS) == SLC_DEFAULT) { + default_slc(); + send_slc(); + } else if (flag == SLC_VARIABLE) { + send_slc(); + } + return; + } + + /* + * Appears to be a function that we know something about. So + * get on with it and see what we know. + */ + + hislevel = flag & SLC_LEVELBITS; + mylevel = slctab[func].current.flag & SLC_LEVELBITS; + ack = flag & SLC_ACK; + /* + * ignore the command if: + * the function value and level are the same as what we already have; + * or the level is the same and the ack bit is set + */ + if (hislevel == mylevel && (val == slctab[func].current.val || ack)) { + return; + } else if (ack) { + /* + * If we get here, we got an ack, but the levels don't match. + * This shouldn't happen. If it does, it is probably because + * we have sent two requests to set a variable without getting + * a response between them, and this is the first response. + * So, ignore it, and wait for the next response. + */ + return; + } else { + change_slc(func, flag, val); + } + +} /* end of process_slc */ + +/* + * change_slc + * + * Process a request to change one of our special characters. + * Compare client's request with what we are capable of supporting. + */ + void +change_slc(func, flag, val) + register char func, flag; + register cc_t val; +{ + register int hislevel, mylevel; + + hislevel = flag & SLC_LEVELBITS; + mylevel = slctab[func].defset.flag & SLC_LEVELBITS; + /* + * If client is setting a function to NOSUPPORT + * or DEFAULT, then we can easily and directly + * accomodate the request. + */ + if (hislevel == SLC_NOSUPPORT) { + slctab[func].current.flag = flag; + slctab[func].current.val = (cc_t)_POSIX_VDISABLE; + flag |= SLC_ACK; + add_slc(func, flag, val); + return; + } + if (hislevel == SLC_DEFAULT) { + /* + * Special case here. If client tells us to use + * the default on a function we don't support, then + * return NOSUPPORT instead of what we may have as a + * default level of DEFAULT. + */ + if (mylevel == SLC_DEFAULT) { + slctab[func].current.flag = SLC_NOSUPPORT; + } else { + slctab[func].current.flag = slctab[func].defset.flag; + } + slctab[func].current.val = slctab[func].defset.val; + add_slc(func, slctab[func].current.flag, + slctab[func].current.val); + return; + } + + /* + * Client wants us to change to a new value or he + * is telling us that he can't change to our value. + * Some of the slc's we support and can change, + * some we do support but can't change, + * and others we don't support at all. + * If we can change it then we have a pointer to + * the place to put the new value, so change it, + * otherwise, continue the negotiation. + */ + if (slctab[func].sptr) { + /* + * We can change this one. + */ + slctab[func].current.val = val; + *(slctab[func].sptr) = val; + slctab[func].current.flag = flag; + flag |= SLC_ACK; + slcchange = 1; + add_slc(func, flag, val); + } else { + /* + * It is not possible for us to support this + * request as he asks. + * + * If our level is DEFAULT, then just ack whatever was + * sent. + * + * If he can't change and we can't change, + * then degenerate to NOSUPPORT. + * + * Otherwise we send our level back to him, (CANTCHANGE + * or NOSUPPORT) and if CANTCHANGE, send + * our value as well. + */ + if (mylevel == SLC_DEFAULT) { + slctab[func].current.flag = flag; + slctab[func].current.val = val; + flag |= SLC_ACK; + } else if (hislevel == SLC_CANTCHANGE && + mylevel == SLC_CANTCHANGE) { + flag &= ~SLC_LEVELBITS; + flag |= SLC_NOSUPPORT; + slctab[func].current.flag = flag; + } else { + flag &= ~SLC_LEVELBITS; + flag |= mylevel; + slctab[func].current.flag = flag; + if (mylevel == SLC_CANTCHANGE) { + slctab[func].current.val = + slctab[func].defset.val; + val = slctab[func].current.val; + } + } + add_slc(func, flag, val); + } + +} /* end of change_slc */ + +#if defined(USE_TERMIO) && (VEOF == VMIN) +cc_t oldeofc = '\004'; +#endif + +/* + * check_slc + * + * Check the special characters in use and notify the client if any have + * changed. Only those characters that are capable of being changed are + * likely to have changed. If a local change occurs, kick the support level + * and flags up to the defaults. + */ + void +check_slc() +{ + register int i; + + for (i = 1; i <= NSLC; i++) { +#if defined(USE_TERMIO) && (VEOF == VMIN) + /* + * In a perfect world this would be a neat little + * function. But in this world, we should not notify + * client of changes to the VEOF char when + * ICANON is off, because it is not representing + * a special character. + */ + if (i == SLC_EOF) { + if (!tty_isediting()) + continue; + else if (slctab[i].sptr) + oldeofc = *(slctab[i].sptr); + } +#endif /* defined(USE_TERMIO) && defined(SYSV_TERMIO) */ + if (slctab[i].sptr && + (*(slctab[i].sptr) != slctab[i].current.val)) { + slctab[i].current.val = *(slctab[i].sptr); + if (*(slctab[i].sptr) == (cc_t)_POSIX_VDISABLE) + slctab[i].current.flag = SLC_NOSUPPORT; + else + slctab[i].current.flag = slctab[i].defset.flag; + add_slc((unsigned char)i, slctab[i].current.flag, + slctab[i].current.val); + } + } +} /* check_slc */ + +/* + * do_opt_slc + * + * Process an slc option buffer. Defer processing of incoming slc's + * until after the terminal state has been processed. Save the first slc + * request that comes along, but discard all others. + * + * ptr points to the beginning of the buffer, len is the length. + */ + void +do_opt_slc(ptr, len) + register unsigned char *ptr; + register int len; +{ + register unsigned char func, flag; + cc_t val; + register unsigned char *end = ptr + len; + + if (terminit()) { /* go ahead */ + while (ptr < end) { + func = *ptr++; + if (ptr >= end) break; + flag = *ptr++; + if (ptr >= end) break; + val = (cc_t)*ptr++; + + process_slc(func, flag, val); + + } + } else { + /* + * save this slc buffer if it is the first, otherwise dump + * it. + */ + if (def_slcbuf == (unsigned char *)0) { + def_slclen = len; + def_slcbuf = (unsigned char *)malloc((unsigned)len); + if (def_slcbuf == (unsigned char *)0) + return; /* too bad */ + memmove(def_slcbuf, ptr, len); + } + } + +} /* end of do_opt_slc */ + +/* + * deferslc + * + * Do slc stuff that was deferred. + */ + void +deferslc() +{ + if (def_slcbuf) { + start_slc(1); + do_opt_slc(def_slcbuf, def_slclen); + (void) end_slc(0); + free(def_slcbuf); + def_slcbuf = (unsigned char *)0; + def_slclen = 0; + } + +} /* end of deferslc */ + +#endif /* LINEMODE */ diff --git a/telnetd/state.c b/telnetd/state.c new file mode 100644 index 0000000..4ee8bea --- /dev/null +++ b/telnetd/state.c @@ -0,0 +1,1612 @@ +/* + * Copyright (c) 1989, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)state.c 8.5 (Berkeley) 5/30/95"; +#endif /* not lint */ + +#include "telnetd.h" +#if defined(AUTHENTICATION) +#include +#endif + +unsigned char doopt[] = { IAC, DO, '%', 'c', 0 }; +unsigned char dont[] = { IAC, DONT, '%', 'c', 0 }; +unsigned char will[] = { IAC, WILL, '%', 'c', 0 }; +unsigned char wont[] = { IAC, WONT, '%', 'c', 0 }; +int not42 = 1; + +/* + * Buffer for sub-options, and macros + * for suboptions buffer manipulations + */ +unsigned char subbuffer[512], *subpointer= subbuffer, *subend= subbuffer; + +#define SB_CLEAR() subpointer = subbuffer +#define SB_TERM() { subend = subpointer; SB_CLEAR(); } +#define SB_ACCUM(c) if (subpointer < (subbuffer+sizeof subbuffer)) { \ + *subpointer++ = (c); \ + } +#define SB_GET() ((*subpointer++)&0xff) +#define SB_EOF() (subpointer >= subend) +#define SB_LEN() (subend - subpointer) + +#ifdef ENV_HACK +unsigned char *subsave; +#define SB_SAVE() subsave = subpointer; +#define SB_RESTORE() subpointer = subsave; +#endif + + +/* + * State for recv fsm + */ +#define TS_DATA 0 /* base state */ +#define TS_IAC 1 /* look for double IAC's */ +#define TS_CR 2 /* CR-LF ->'s CR */ +#define TS_SB 3 /* throw away begin's... */ +#define TS_SE 4 /* ...end's (suboption negotiation) */ +#define TS_WILL 5 /* will option negotiation */ +#define TS_WONT 6 /* wont " */ +#define TS_DO 7 /* do " */ +#define TS_DONT 8 /* dont " */ + + void +telrcv() +{ + register int c; + static int state = TS_DATA; +#if defined(CRAY2) && defined(UNICOS5) + char *opfrontp = pfrontp; +#endif + + while (ncc > 0) { + if ((&ptyobuf[BUFSIZ] - pfrontp) < 2) + break; + c = *netip++ & 0377, ncc--; +#ifdef ENCRYPTION + if (decrypt_input) + c = (*decrypt_input)(c); +#endif /* ENCRYPTION */ + switch (state) { + + case TS_CR: + state = TS_DATA; + /* Strip off \n or \0 after a \r */ + if ((c == 0) || (c == '\n')) { + break; + } + /* FALL THROUGH */ + + case TS_DATA: + if (c == IAC) { + state = TS_IAC; + break; + } + /* + * We now map \r\n ==> \r for pragmatic reasons. + * Many client implementations send \r\n when + * the user hits the CarriageReturn key. + * + * We USED to map \r\n ==> \n, since \r\n says + * that we want to be in column 1 of the next + * printable line, and \n is the standard + * unix way of saying that (\r is only good + * if CRMOD is set, which it normally is). + */ + if ((c == '\r') && his_state_is_wont(TELOPT_BINARY)) { + int nc = *netip; +#ifdef ENCRYPTION + if (decrypt_input) + nc = (*decrypt_input)(nc & 0xff); +#endif /* ENCRYPTION */ +#ifdef LINEMODE + /* + * If we are operating in linemode, + * convert to local end-of-line. + */ + if (linemode && (ncc > 0) && (('\n' == nc) || + ((0 == nc) && tty_iscrnl())) ) { + netip++; ncc--; + c = '\n'; + } else +#endif + { +#ifdef ENCRYPTION + if (decrypt_input) + (void)(*decrypt_input)(-1); +#endif /* ENCRYPTION */ + state = TS_CR; + } + } + *pfrontp++ = c; + break; + + case TS_IAC: +gotiac: switch (c) { + + /* + * Send the process on the pty side an + * interrupt. Do this with a NULL or + * interrupt char; depending on the tty mode. + */ + case IP: + DIAG(TD_OPTIONS, + printoption("td: recv IAC", c)); + interrupt(); + break; + + case BREAK: + DIAG(TD_OPTIONS, + printoption("td: recv IAC", c)); + sendbrk(); + break; + + /* + * Are You There? + */ + case AYT: + DIAG(TD_OPTIONS, + printoption("td: recv IAC", c)); + recv_ayt(); + break; + + /* + * Abort Output + */ + case AO: + { + DIAG(TD_OPTIONS, + printoption("td: recv IAC", c)); + ptyflush(); /* half-hearted */ + init_termbuf(); + + if (slctab[SLC_AO].sptr && + *slctab[SLC_AO].sptr != (cc_t)(_POSIX_VDISABLE)) { + *pfrontp++ = + (unsigned char)*slctab[SLC_AO].sptr; + } + + netclear(); /* clear buffer back */ + *nfrontp++ = IAC; + *nfrontp++ = DM; + neturg = nfrontp-1; /* off by one XXX */ + DIAG(TD_OPTIONS, + printoption("td: send IAC", DM)); + break; + } + + /* + * Erase Character and + * Erase Line + */ + case EC: + case EL: + { + cc_t ch; + + DIAG(TD_OPTIONS, + printoption("td: recv IAC", c)); + ptyflush(); /* half-hearted */ + init_termbuf(); + if (c == EC) + ch = *slctab[SLC_EC].sptr; + else + ch = *slctab[SLC_EL].sptr; + if (ch != (cc_t)(_POSIX_VDISABLE)) + *pfrontp++ = (unsigned char)ch; + break; + } + + /* + * Check for urgent data... + */ + case DM: + DIAG(TD_OPTIONS, + printoption("td: recv IAC", c)); + SYNCHing = stilloob(net); + settimer(gotDM); + break; + + + /* + * Begin option subnegotiation... + */ + case SB: + state = TS_SB; + SB_CLEAR(); + continue; + + case WILL: + state = TS_WILL; + continue; + + case WONT: + state = TS_WONT; + continue; + + case DO: + state = TS_DO; + continue; + + case DONT: + state = TS_DONT; + continue; + case EOR: + if (his_state_is_will(TELOPT_EOR)) + doeof(); + break; + + /* + * Handle RFC 10xx Telnet linemode option additions + * to command stream (EOF, SUSP, ABORT). + */ + case xEOF: + doeof(); + break; + + case SUSP: + sendsusp(); + break; + + case ABORT: + sendbrk(); + break; + + case IAC: + *pfrontp++ = c; + break; + } + state = TS_DATA; + break; + + case TS_SB: + if (c == IAC) { + state = TS_SE; + } else { + SB_ACCUM(c); + } + break; + + case TS_SE: + if (c != SE) { + if (c != IAC) { + /* + * bad form of suboption negotiation. + * handle it in such a way as to avoid + * damage to local state. Parse + * suboption buffer found so far, + * then treat remaining stream as + * another command sequence. + */ + + /* for DIAGNOSTICS */ + SB_ACCUM(IAC); + SB_ACCUM(c); + subpointer -= 2; + + SB_TERM(); + suboption(); + state = TS_IAC; + goto gotiac; + } + SB_ACCUM(c); + state = TS_SB; + } else { + /* for DIAGNOSTICS */ + SB_ACCUM(IAC); + SB_ACCUM(SE); + subpointer -= 2; + + SB_TERM(); + suboption(); /* handle sub-option */ + state = TS_DATA; + } + break; + + case TS_WILL: + willoption(c); + state = TS_DATA; + continue; + + case TS_WONT: + wontoption(c); + state = TS_DATA; + continue; + + case TS_DO: + dooption(c); + state = TS_DATA; + continue; + + case TS_DONT: + dontoption(c); + state = TS_DATA; + continue; + + default: + syslog(LOG_ERR, "telnetd: panic state=%d\n", state); + printf("telnetd: panic state=%d\n", state); + exit(1); + } + } +#if defined(CRAY2) && defined(UNICOS5) + if (!linemode) { + char xptyobuf[BUFSIZ+NETSLOP]; + char xbuf2[BUFSIZ]; + register char *cp; + int n = pfrontp - opfrontp, oc; + memmove(xptyobuf, opfrontp, n); + pfrontp = opfrontp; + pfrontp += term_input(xptyobuf, pfrontp, n, BUFSIZ+NETSLOP, + xbuf2, &oc, BUFSIZ); + for (cp = xbuf2; oc > 0; --oc) + if ((*nfrontp++ = *cp++) == IAC) + *nfrontp++ = IAC; + } +#endif /* defined(CRAY2) && defined(UNICOS5) */ +} /* end of telrcv */ + +/* + * The will/wont/do/dont state machines are based on Dave Borman's + * Telnet option processing state machine. + * + * These correspond to the following states: + * my_state = the last negotiated state + * want_state = what I want the state to go to + * want_resp = how many requests I have sent + * All state defaults are negative, and resp defaults to 0. + * + * When initiating a request to change state to new_state: + * + * if ((want_resp == 0 && new_state == my_state) || want_state == new_state) { + * do nothing; + * } else { + * want_state = new_state; + * send new_state; + * want_resp++; + * } + * + * When receiving new_state: + * + * if (want_resp) { + * want_resp--; + * if (want_resp && (new_state == my_state)) + * want_resp--; + * } + * if ((want_resp == 0) && (new_state != want_state)) { + * if (ok_to_switch_to new_state) + * want_state = new_state; + * else + * want_resp++; + * send want_state; + * } + * my_state = new_state; + * + * Note that new_state is implied in these functions by the function itself. + * will and do imply positive new_state, wont and dont imply negative. + * + * Finally, there is one catch. If we send a negative response to a + * positive request, my_state will be the positive while want_state will + * remain negative. my_state will revert to negative when the negative + * acknowlegment arrives from the peer. Thus, my_state generally tells + * us not only the last negotiated state, but also tells us what the peer + * wants to be doing as well. It is important to understand this difference + * as we may wish to be processing data streams based on our desired state + * (want_state) or based on what the peer thinks the state is (my_state). + * + * This all works fine because if the peer sends a positive request, the data + * that we receive prior to negative acknowlegment will probably be affected + * by the positive state, and we can process it as such (if we can; if we + * can't then it really doesn't matter). If it is that important, then the + * peer probably should be buffering until this option state negotiation + * is complete. + * + */ + void +send_do(option, init) + int option, init; +{ + if (init) { + if ((do_dont_resp[option] == 0 && his_state_is_will(option)) || + his_want_state_is_will(option)) + return; + /* + * Special case for TELOPT_TM: We send a DO, but pretend + * that we sent a DONT, so that we can send more DOs if + * we want to. + */ + if (option == TELOPT_TM) + set_his_want_state_wont(option); + else + set_his_want_state_will(option); + do_dont_resp[option]++; + } + (void) sprintf(nfrontp, (char *)doopt, option); + nfrontp += sizeof (dont) - 2; + + DIAG(TD_OPTIONS, printoption("td: send do", option)); +} + +#ifdef AUTHENTICATION +extern void auth_request(); +#endif +#ifdef LINEMODE +extern void doclientstat(); +#endif +#ifdef ENCRYPTION +extern void encrypt_send_support(); +#endif /* ENCRYPTION */ + + void +willoption(option) + int option; +{ + int changeok = 0; + void (*func)() = 0; + + /* + * process input from peer. + */ + + DIAG(TD_OPTIONS, printoption("td: recv will", option)); + + if (do_dont_resp[option]) { + do_dont_resp[option]--; + if (do_dont_resp[option] && his_state_is_will(option)) + do_dont_resp[option]--; + } + if (do_dont_resp[option] == 0) { + if (his_want_state_is_wont(option)) { + switch (option) { + + case TELOPT_BINARY: + init_termbuf(); + tty_binaryin(1); + set_termbuf(); + changeok++; + break; + + case TELOPT_ECHO: + /* + * See comments below for more info. + */ + not42 = 0; /* looks like a 4.2 system */ + break; + + case TELOPT_TM: +#if defined(LINEMODE) && defined(KLUDGELINEMODE) + /* + * This telnetd implementation does not really + * support timing marks, it just uses them to + * support the kludge linemode stuff. If we + * receive a will or wont TM in response to our + * do TM request that may have been sent to + * determine kludge linemode support, process + * it, otherwise TM should get a negative + * response back. + */ + /* + * Handle the linemode kludge stuff. + * If we are not currently supporting any + * linemode at all, then we assume that this + * is the client telling us to use kludge + * linemode in response to our query. Set the + * linemode type that is to be supported, note + * that the client wishes to use linemode, and + * eat the will TM as though it never arrived. + */ + if (lmodetype < KLUDGE_LINEMODE) { + lmodetype = KLUDGE_LINEMODE; + clientstat(TELOPT_LINEMODE, WILL, 0); + send_wont(TELOPT_SGA, 1); + } else if (lmodetype == NO_AUTOKLUDGE) { + lmodetype = KLUDGE_OK; + } +#endif /* defined(LINEMODE) && defined(KLUDGELINEMODE) */ + /* + * We never respond to a WILL TM, and + * we leave the state WONT. + */ + return; + + case TELOPT_LFLOW: + /* + * If we are going to support flow control + * option, then don't worry peer that we can't + * change the flow control characters. + */ + slctab[SLC_XON].defset.flag &= ~SLC_LEVELBITS; + slctab[SLC_XON].defset.flag |= SLC_DEFAULT; + slctab[SLC_XOFF].defset.flag &= ~SLC_LEVELBITS; + slctab[SLC_XOFF].defset.flag |= SLC_DEFAULT; + case TELOPT_TTYPE: + case TELOPT_SGA: + case TELOPT_NAWS: + case TELOPT_TSPEED: + case TELOPT_XDISPLOC: + case TELOPT_NEW_ENVIRON: + case TELOPT_OLD_ENVIRON: + changeok++; + break; + +#ifdef LINEMODE + case TELOPT_LINEMODE: +# ifdef KLUDGELINEMODE + /* + * Note client's desire to use linemode. + */ + lmodetype = REAL_LINEMODE; +# endif /* KLUDGELINEMODE */ + func = doclientstat; + changeok++; + break; +#endif /* LINEMODE */ + +#ifdef AUTHENTICATION + case TELOPT_AUTHENTICATION: + func = auth_request; + changeok++; + break; +#endif + +#ifdef ENCRYPTION + case TELOPT_ENCRYPT: + func = encrypt_send_support; + changeok++; + break; +#endif /* ENCRYPTION */ + + default: + break; + } + if (changeok) { + set_his_want_state_will(option); + send_do(option, 0); + } else { + do_dont_resp[option]++; + send_dont(option, 0); + } + } else { + /* + * Option processing that should happen when + * we receive conformation of a change in + * state that we had requested. + */ + switch (option) { + case TELOPT_ECHO: + not42 = 0; /* looks like a 4.2 system */ + /* + * Egads, he responded "WILL ECHO". Turn + * it off right now! + */ + send_dont(option, 1); + /* + * "WILL ECHO". Kludge upon kludge! + * A 4.2 client is now echoing user input at + * the tty. This is probably undesireable and + * it should be stopped. The client will + * respond WONT TM to the DO TM that we send to + * check for kludge linemode. When the WONT TM + * arrives, linemode will be turned off and a + * change propogated to the pty. This change + * will cause us to process the new pty state + * in localstat(), which will notice that + * linemode is off and send a WILL ECHO + * so that we are properly in character mode and + * all is well. + */ + break; +#ifdef LINEMODE + case TELOPT_LINEMODE: +# ifdef KLUDGELINEMODE + /* + * Note client's desire to use linemode. + */ + lmodetype = REAL_LINEMODE; +# endif /* KLUDGELINEMODE */ + func = doclientstat; + break; +#endif /* LINEMODE */ + +#ifdef AUTHENTICATION + case TELOPT_AUTHENTICATION: + func = auth_request; + break; +#endif + +#ifdef ENCRYPTION + case TELOPT_ENCRYPT: + func = encrypt_send_support; + break; +#endif /* ENCRYPTION */ + case TELOPT_LFLOW: + func = flowstat; + break; + } + } + } + set_his_state_will(option); + if (func) + (*func)(); +} /* end of willoption */ + + void +send_dont(option, init) + int option, init; +{ + if (init) { + if ((do_dont_resp[option] == 0 && his_state_is_wont(option)) || + his_want_state_is_wont(option)) + return; + set_his_want_state_wont(option); + do_dont_resp[option]++; + } + (void) sprintf(nfrontp, (char *)dont, option); + nfrontp += sizeof (doopt) - 2; + + DIAG(TD_OPTIONS, printoption("td: send dont", option)); +} + + void +wontoption(option) + int option; +{ + /* + * Process client input. + */ + + DIAG(TD_OPTIONS, printoption("td: recv wont", option)); + + if (do_dont_resp[option]) { + do_dont_resp[option]--; + if (do_dont_resp[option] && his_state_is_wont(option)) + do_dont_resp[option]--; + } + if (do_dont_resp[option] == 0) { + if (his_want_state_is_will(option)) { + /* it is always ok to change to negative state */ + switch (option) { + case TELOPT_ECHO: + not42 = 1; /* doesn't seem to be a 4.2 system */ + break; + + case TELOPT_BINARY: + init_termbuf(); + tty_binaryin(0); + set_termbuf(); + break; + +#ifdef LINEMODE + case TELOPT_LINEMODE: +# ifdef KLUDGELINEMODE + /* + * If real linemode is supported, then client is + * asking to turn linemode off. + */ + if (lmodetype != REAL_LINEMODE) + break; +# endif /* KLUDGELINEMODE */ + clientstat(TELOPT_LINEMODE, WONT, 0); + break; +#endif /* LINEMODE */ + + case TELOPT_TM: + /* + * If we get a WONT TM, and had sent a DO TM, + * don't respond with a DONT TM, just leave it + * as is. Short circut the state machine to + * achive this. + */ + set_his_want_state_wont(TELOPT_TM); + return; + + case TELOPT_LFLOW: + /* + * If we are not going to support flow control + * option, then let peer know that we can't + * change the flow control characters. + */ + slctab[SLC_XON].defset.flag &= ~SLC_LEVELBITS; + slctab[SLC_XON].defset.flag |= SLC_CANTCHANGE; + slctab[SLC_XOFF].defset.flag &= ~SLC_LEVELBITS; + slctab[SLC_XOFF].defset.flag |= SLC_CANTCHANGE; + break; + +#if defined(AUTHENTICATION) + case TELOPT_AUTHENTICATION: + auth_finished(0, AUTH_REJECT); + break; +#endif + + /* + * For options that we might spin waiting for + * sub-negotiation, if the client turns off the + * option rather than responding to the request, + * we have to treat it here as if we got a response + * to the sub-negotiation, (by updating the timers) + * so that we'll break out of the loop. + */ + case TELOPT_TTYPE: + settimer(ttypesubopt); + break; + + case TELOPT_TSPEED: + settimer(tspeedsubopt); + break; + + case TELOPT_XDISPLOC: + settimer(xdisplocsubopt); + break; + + case TELOPT_OLD_ENVIRON: + settimer(oenvironsubopt); + break; + + case TELOPT_NEW_ENVIRON: + settimer(environsubopt); + break; + + default: + break; + } + set_his_want_state_wont(option); + if (his_state_is_will(option)) + send_dont(option, 0); + } else { + switch (option) { + case TELOPT_TM: +#if defined(LINEMODE) && defined(KLUDGELINEMODE) + if (lmodetype < NO_AUTOKLUDGE) { + lmodetype = NO_LINEMODE; + clientstat(TELOPT_LINEMODE, WONT, 0); + send_will(TELOPT_SGA, 1); + send_will(TELOPT_ECHO, 1); + } +#endif /* defined(LINEMODE) && defined(KLUDGELINEMODE) */ + break; + +#if defined(AUTHENTICATION) + case TELOPT_AUTHENTICATION: + auth_finished(0, AUTH_REJECT); + break; +#endif + default: + break; + } + } + } + set_his_state_wont(option); + +} /* end of wontoption */ + + void +send_will(option, init) + int option, init; +{ + if (init) { + if ((will_wont_resp[option] == 0 && my_state_is_will(option))|| + my_want_state_is_will(option)) + return; + set_my_want_state_will(option); + will_wont_resp[option]++; + } + (void) sprintf(nfrontp, (char *)will, option); + nfrontp += sizeof (doopt) - 2; + + DIAG(TD_OPTIONS, printoption("td: send will", option)); +} + +#if !defined(LINEMODE) || !defined(KLUDGELINEMODE) +/* + * When we get a DONT SGA, we will try once to turn it + * back on. If the other side responds DONT SGA, we + * leave it at that. This is so that when we talk to + * clients that understand KLUDGELINEMODE but not LINEMODE, + * we'll keep them in char-at-a-time mode. + */ +int turn_on_sga = 0; +#endif + + void +dooption(option) + int option; +{ + int changeok = 0; + + /* + * Process client input. + */ + + DIAG(TD_OPTIONS, printoption("td: recv do", option)); + + if (will_wont_resp[option]) { + will_wont_resp[option]--; + if (will_wont_resp[option] && my_state_is_will(option)) + will_wont_resp[option]--; + } + if ((will_wont_resp[option] == 0) && (my_want_state_is_wont(option))) { + switch (option) { + case TELOPT_ECHO: +#ifdef LINEMODE +# ifdef KLUDGELINEMODE + if (lmodetype == NO_LINEMODE) +# else + if (his_state_is_wont(TELOPT_LINEMODE)) +# endif +#endif + { + init_termbuf(); + tty_setecho(1); + set_termbuf(); + } + changeok++; + break; + + case TELOPT_BINARY: + init_termbuf(); + tty_binaryout(1); + set_termbuf(); + changeok++; + break; + + case TELOPT_SGA: +#if defined(LINEMODE) && defined(KLUDGELINEMODE) + /* + * If kludge linemode is in use, then we must + * process an incoming do SGA for linemode + * purposes. + */ + if (lmodetype == KLUDGE_LINEMODE) { + /* + * Receipt of "do SGA" in kludge + * linemode is the peer asking us to + * turn off linemode. Make note of + * the request. + */ + clientstat(TELOPT_LINEMODE, WONT, 0); + /* + * If linemode did not get turned off + * then don't tell peer that we did. + * Breaking here forces a wont SGA to + * be returned. + */ + if (linemode) + break; + } +#else + turn_on_sga = 0; +#endif /* defined(LINEMODE) && defined(KLUDGELINEMODE) */ + changeok++; + break; + + case TELOPT_STATUS: + changeok++; + break; + + case TELOPT_TM: + /* + * Special case for TM. We send a WILL, but + * pretend we sent a WONT. + */ + send_will(option, 0); + set_my_want_state_wont(option); + set_my_state_wont(option); + return; + + case TELOPT_LOGOUT: + /* + * When we get a LOGOUT option, respond + * with a WILL LOGOUT, make sure that + * it gets written out to the network, + * and then just go away... + */ + set_my_want_state_will(TELOPT_LOGOUT); + send_will(TELOPT_LOGOUT, 0); + set_my_state_will(TELOPT_LOGOUT); + (void)netflush(); + cleanup(0); + /* NOT REACHED */ + break; + +#ifdef ENCRYPTION + case TELOPT_ENCRYPT: + changeok++; + break; +#endif /* ENCRYPTION */ + case TELOPT_LINEMODE: + case TELOPT_TTYPE: + case TELOPT_NAWS: + case TELOPT_TSPEED: + case TELOPT_LFLOW: + case TELOPT_XDISPLOC: +#ifdef TELOPT_ENVIRON + case TELOPT_NEW_ENVIRON: +#endif + case TELOPT_OLD_ENVIRON: + default: + break; + } + if (changeok) { + set_my_want_state_will(option); + send_will(option, 0); + } else { + will_wont_resp[option]++; + send_wont(option, 0); + } + } + set_my_state_will(option); + +} /* end of dooption */ + + void +send_wont(option, init) + int option, init; +{ + if (init) { + if ((will_wont_resp[option] == 0 && my_state_is_wont(option)) || + my_want_state_is_wont(option)) + return; + set_my_want_state_wont(option); + will_wont_resp[option]++; + } + (void) sprintf(nfrontp, (char *)wont, option); + nfrontp += sizeof (wont) - 2; + + DIAG(TD_OPTIONS, printoption("td: send wont", option)); +} + + void +dontoption(option) + int option; +{ + /* + * Process client input. + */ + + + DIAG(TD_OPTIONS, printoption("td: recv dont", option)); + + if (will_wont_resp[option]) { + will_wont_resp[option]--; + if (will_wont_resp[option] && my_state_is_wont(option)) + will_wont_resp[option]--; + } + if ((will_wont_resp[option] == 0) && (my_want_state_is_will(option))) { + switch (option) { + case TELOPT_BINARY: + init_termbuf(); + tty_binaryout(0); + set_termbuf(); + break; + + case TELOPT_ECHO: /* we should stop echoing */ +#ifdef LINEMODE +# ifdef KLUDGELINEMODE + if ((lmodetype != REAL_LINEMODE) && + (lmodetype != KLUDGE_LINEMODE)) +# else + if (his_state_is_wont(TELOPT_LINEMODE)) +# endif +#endif + { + init_termbuf(); + tty_setecho(0); + set_termbuf(); + } + break; + + case TELOPT_SGA: +#if defined(LINEMODE) && defined(KLUDGELINEMODE) + /* + * If kludge linemode is in use, then we + * must process an incoming do SGA for + * linemode purposes. + */ + if ((lmodetype == KLUDGE_LINEMODE) || + (lmodetype == KLUDGE_OK)) { + /* + * The client is asking us to turn + * linemode on. + */ + lmodetype = KLUDGE_LINEMODE; + clientstat(TELOPT_LINEMODE, WILL, 0); + /* + * If we did not turn line mode on, + * then what do we say? Will SGA? + * This violates design of telnet. + * Gross. Very Gross. + */ + } + break; +#else + set_my_want_state_wont(option); + if (my_state_is_will(option)) + send_wont(option, 0); + set_my_state_wont(option); + if (turn_on_sga ^= 1) + send_will(option, 1); + return; +#endif /* defined(LINEMODE) && defined(KLUDGELINEMODE) */ + + default: + break; + } + + set_my_want_state_wont(option); + if (my_state_is_will(option)) + send_wont(option, 0); + } + set_my_state_wont(option); + +} /* end of dontoption */ + +#ifdef ENV_HACK +int env_ovar = -1; +int env_ovalue = -1; +#else /* ENV_HACK */ +# define env_ovar OLD_ENV_VAR +# define env_ovalue OLD_ENV_VALUE +#endif /* ENV_HACK */ + +/* + * suboption() + * + * Look at the sub-option buffer, and try to be helpful to the other + * side. + * + * Currently we recognize: + * + * Terminal type is + * Linemode + * Window size + * Terminal speed + */ + void +suboption() +{ + register int subchar; + + DIAG(TD_OPTIONS, {netflush(); printsub('<', subpointer, SB_LEN()+2);}); + + subchar = SB_GET(); + switch (subchar) { + case TELOPT_TSPEED: { + register int xspeed, rspeed; + + if (his_state_is_wont(TELOPT_TSPEED)) /* Ignore if option disabled */ + break; + + settimer(tspeedsubopt); + + if (SB_EOF() || SB_GET() != TELQUAL_IS) + return; + + xspeed = atoi((char *)subpointer); + + while (SB_GET() != ',' && !SB_EOF()); + if (SB_EOF()) + return; + + rspeed = atoi((char *)subpointer); + clientstat(TELOPT_TSPEED, xspeed, rspeed); + + break; + + } /* end of case TELOPT_TSPEED */ + + case TELOPT_TTYPE: { /* Yaaaay! */ + static char terminalname[41]; + + if (his_state_is_wont(TELOPT_TTYPE)) /* Ignore if option disabled */ + break; + settimer(ttypesubopt); + + if (SB_EOF() || SB_GET() != TELQUAL_IS) { + return; /* ??? XXX but, this is the most robust */ + } + + terminaltype = terminalname; + + while ((terminaltype < (terminalname + sizeof terminalname-1)) && + !SB_EOF()) { + register int c; + + c = SB_GET(); + if (isupper(c)) { + c = tolower(c); + } + *terminaltype++ = c; /* accumulate name */ + } + *terminaltype = 0; + terminaltype = terminalname; + break; + } /* end of case TELOPT_TTYPE */ + + case TELOPT_NAWS: { + register int xwinsize, ywinsize; + + if (his_state_is_wont(TELOPT_NAWS)) /* Ignore if option disabled */ + break; + + if (SB_EOF()) + return; + xwinsize = SB_GET() << 8; + if (SB_EOF()) + return; + xwinsize |= SB_GET(); + if (SB_EOF()) + return; + ywinsize = SB_GET() << 8; + if (SB_EOF()) + return; + ywinsize |= SB_GET(); + clientstat(TELOPT_NAWS, xwinsize, ywinsize); + + break; + + } /* end of case TELOPT_NAWS */ + +#ifdef LINEMODE + case TELOPT_LINEMODE: { + register int request; + + if (his_state_is_wont(TELOPT_LINEMODE)) /* Ignore if option disabled */ + break; + /* + * Process linemode suboptions. + */ + if (SB_EOF()) + break; /* garbage was sent */ + request = SB_GET(); /* get will/wont */ + + if (SB_EOF()) + break; /* another garbage check */ + + if (request == LM_SLC) { /* SLC is not preceeded by WILL or WONT */ + /* + * Process suboption buffer of slc's + */ + start_slc(1); + do_opt_slc(subpointer, subend - subpointer); + (void) end_slc(0); + break; + } else if (request == LM_MODE) { + if (SB_EOF()) + return; + useeditmode = SB_GET(); /* get mode flag */ + clientstat(LM_MODE, 0, 0); + break; + } + + if (SB_EOF()) + break; + switch (SB_GET()) { /* what suboption? */ + case LM_FORWARDMASK: + /* + * According to spec, only server can send request for + * forwardmask, and client can only return a positive response. + * So don't worry about it. + */ + + default: + break; + } + break; + } /* end of case TELOPT_LINEMODE */ +#endif + case TELOPT_STATUS: { + int mode; + + if (SB_EOF()) + break; + mode = SB_GET(); + switch (mode) { + case TELQUAL_SEND: + if (my_state_is_will(TELOPT_STATUS)) + send_status(); + break; + + case TELQUAL_IS: + break; + + default: + break; + } + break; + } /* end of case TELOPT_STATUS */ + + case TELOPT_XDISPLOC: { + if (SB_EOF() || SB_GET() != TELQUAL_IS) + return; + settimer(xdisplocsubopt); + subpointer[SB_LEN()] = '\0'; + (void)setenv("DISPLAY", (char *)subpointer, 1); + break; + } /* end of case TELOPT_XDISPLOC */ + +#ifdef TELOPT_NEW_ENVIRON + case TELOPT_NEW_ENVIRON: +#endif + case TELOPT_OLD_ENVIRON: { + register int c; + register char *cp, *varp, *valp; + + if (SB_EOF()) + return; + c = SB_GET(); + if (c == TELQUAL_IS) { + if (subchar == TELOPT_OLD_ENVIRON) + settimer(oenvironsubopt); + else + settimer(environsubopt); + } else if (c != TELQUAL_INFO) { + return; + } + +#ifdef TELOPT_NEW_ENVIRON + if (subchar == TELOPT_NEW_ENVIRON) { + while (!SB_EOF()) { + c = SB_GET(); + if ((c == NEW_ENV_VAR) || (c == ENV_USERVAR)) + break; + } + } else +#endif + { +#ifdef ENV_HACK + /* + * We only want to do this if we haven't already decided + * whether or not the other side has its VALUE and VAR + * reversed. + */ + if (env_ovar < 0) { + register int last = -1; /* invalid value */ + int empty = 0; + int got_var = 0, got_value = 0, got_uservar = 0; + + /* + * The other side might have its VALUE and VAR values + * reversed. To be interoperable, we need to determine + * which way it is. If the first recognized character + * is a VAR or VALUE, then that will tell us what + * type of client it is. If the fist recognized + * character is a USERVAR, then we continue scanning + * the suboption looking for two consecutive + * VAR or VALUE fields. We should not get two + * consecutive VALUE fields, so finding two + * consecutive VALUE or VAR fields will tell us + * what the client is. + */ + SB_SAVE(); + while (!SB_EOF()) { + c = SB_GET(); + switch(c) { + case OLD_ENV_VAR: + if (last < 0 || last == OLD_ENV_VAR + || (empty && (last == OLD_ENV_VALUE))) + goto env_ovar_ok; + got_var++; + last = OLD_ENV_VAR; + break; + case OLD_ENV_VALUE: + if (last < 0 || last == OLD_ENV_VALUE + || (empty && (last == OLD_ENV_VAR))) + goto env_ovar_wrong; + got_value++; + last = OLD_ENV_VALUE; + break; + case ENV_USERVAR: + /* count strings of USERVAR as one */ + if (last != ENV_USERVAR) + got_uservar++; + if (empty) { + if (last == OLD_ENV_VALUE) + goto env_ovar_ok; + if (last == OLD_ENV_VAR) + goto env_ovar_wrong; + } + last = ENV_USERVAR; + break; + case ENV_ESC: + if (!SB_EOF()) + c = SB_GET(); + /* FALL THROUGH */ + default: + empty = 0; + continue; + } + empty = 1; + } + if (empty) { + if (last == OLD_ENV_VALUE) + goto env_ovar_ok; + if (last == OLD_ENV_VAR) + goto env_ovar_wrong; + } + /* + * Ok, the first thing was a USERVAR, and there + * are not two consecutive VAR or VALUE commands, + * and none of the VAR or VALUE commands are empty. + * If the client has sent us a well-formed option, + * then the number of VALUEs received should always + * be less than or equal to the number of VARs and + * USERVARs received. + * + * If we got exactly as many VALUEs as VARs and + * USERVARs, the client has the same definitions. + * + * If we got exactly as many VARs as VALUEs and + * USERVARS, the client has reversed definitions. + */ + if (got_uservar + got_var == got_value) { + env_ovar_ok: + env_ovar = OLD_ENV_VAR; + env_ovalue = OLD_ENV_VALUE; + } else if (got_uservar + got_value == got_var) { + env_ovar_wrong: + env_ovar = OLD_ENV_VALUE; + env_ovalue = OLD_ENV_VAR; + DIAG(TD_OPTIONS, {sprintf(nfrontp, + "ENVIRON VALUE and VAR are reversed!\r\n"); + nfrontp += strlen(nfrontp);}); + + } + } + SB_RESTORE(); +#endif + + while (!SB_EOF()) { + c = SB_GET(); + if ((c == env_ovar) || (c == ENV_USERVAR)) + break; + } + } + + if (SB_EOF()) + return; + + cp = varp = (char *)subpointer; + valp = 0; + + while (!SB_EOF()) { + c = SB_GET(); + if (subchar == TELOPT_OLD_ENVIRON) { + if (c == env_ovar) + c = NEW_ENV_VAR; + else if (c == env_ovalue) + c = NEW_ENV_VALUE; + } + switch (c) { + + case NEW_ENV_VALUE: + *cp = '\0'; + cp = valp = (char *)subpointer; + break; + + case NEW_ENV_VAR: + case ENV_USERVAR: + *cp = '\0'; + if (valp) + (void)setenv(varp, valp, 1); + else + unsetenv(varp); + cp = varp = (char *)subpointer; + valp = 0; + break; + + case ENV_ESC: + if (SB_EOF()) + break; + c = SB_GET(); + /* FALL THROUGH */ + default: + *cp++ = c; + break; + } + } + *cp = '\0'; + if (valp) + (void)setenv(varp, valp, 1); + else + unsetenv(varp); + break; + } /* end of case TELOPT_NEW_ENVIRON */ +#if defined(AUTHENTICATION) + case TELOPT_AUTHENTICATION: + if (SB_EOF()) + break; + switch(SB_GET()) { + case TELQUAL_SEND: + case TELQUAL_REPLY: + /* + * These are sent by us and cannot be sent by + * the client. + */ + break; + case TELQUAL_IS: + auth_is(subpointer, SB_LEN()); + break; + case TELQUAL_NAME: + auth_name(subpointer, SB_LEN()); + break; + } + break; +#endif +#ifdef ENCRYPTION + case TELOPT_ENCRYPT: + if (SB_EOF()) + break; + switch(SB_GET()) { + case ENCRYPT_SUPPORT: + encrypt_support(subpointer, SB_LEN()); + break; + case ENCRYPT_IS: + encrypt_is(subpointer, SB_LEN()); + break; + case ENCRYPT_REPLY: + encrypt_reply(subpointer, SB_LEN()); + break; + case ENCRYPT_START: + encrypt_start(subpointer, SB_LEN()); + break; + case ENCRYPT_END: + encrypt_end(); + break; + case ENCRYPT_REQSTART: + encrypt_request_start(subpointer, SB_LEN()); + break; + case ENCRYPT_REQEND: + /* + * We can always send an REQEND so that we cannot + * get stuck encrypting. We should only get this + * if we have been able to get in the correct mode + * anyhow. + */ + encrypt_request_end(); + break; + case ENCRYPT_ENC_KEYID: + encrypt_enc_keyid(subpointer, SB_LEN()); + break; + case ENCRYPT_DEC_KEYID: + encrypt_dec_keyid(subpointer, SB_LEN()); + break; + default: + break; + } + break; +#endif /* ENCRYPTION */ + + default: + break; + } /* end of switch */ + +} /* end of suboption */ + + void +doclientstat() +{ + clientstat(TELOPT_LINEMODE, WILL, 0); +} + +#define ADD(c) *ncp++ = c +#define ADD_DATA(c) { *ncp++ = c; if (c == SE || c == IAC) *ncp++ = c; } + void +send_status() +{ + unsigned char statusbuf[256]; + register unsigned char *ncp; + register unsigned char i; + + ncp = statusbuf; + + netflush(); /* get rid of anything waiting to go out */ + + ADD(IAC); + ADD(SB); + ADD(TELOPT_STATUS); + ADD(TELQUAL_IS); + + /* + * We check the want_state rather than the current state, + * because if we received a DO/WILL for an option that we + * don't support, and the other side didn't send a DONT/WONT + * in response to our WONT/DONT, then the "state" will be + * WILL/DO, and the "want_state" will be WONT/DONT. We + * need to go by the latter. + */ + for (i = 0; i < (unsigned char)NTELOPTS; i++) { + if (my_want_state_is_will(i)) { + ADD(WILL); + ADD_DATA(i); + } + if (his_want_state_is_will(i)) { + ADD(DO); + ADD_DATA(i); + } + } + + if (his_want_state_is_will(TELOPT_LFLOW)) { + ADD(SB); + ADD(TELOPT_LFLOW); + if (flowmode) { + ADD(LFLOW_ON); + } else { + ADD(LFLOW_OFF); + } + ADD(SE); + + if (restartany >= 0) { + ADD(SB); + ADD(TELOPT_LFLOW); + if (restartany) { + ADD(LFLOW_RESTART_ANY); + } else { + ADD(LFLOW_RESTART_XON); + } + ADD(SE); + } + } + +#ifdef LINEMODE + if (his_want_state_is_will(TELOPT_LINEMODE)) { + unsigned char *cp, *cpe; + int len; + + ADD(SB); + ADD(TELOPT_LINEMODE); + ADD(LM_MODE); + ADD_DATA(editmode); + ADD(SE); + + ADD(SB); + ADD(TELOPT_LINEMODE); + ADD(LM_SLC); + start_slc(0); + send_slc(); + len = end_slc(&cp); + for (cpe = cp + len; cp < cpe; cp++) + ADD_DATA(*cp); + ADD(SE); + } +#endif /* LINEMODE */ + + ADD(IAC); + ADD(SE); + + writenet(statusbuf, ncp - statusbuf); + netflush(); /* Send it on its way */ + + DIAG(TD_OPTIONS, + {printsub('>', statusbuf, ncp - statusbuf); netflush();}); +} diff --git a/telnetd/sys_term.c b/telnetd/sys_term.c new file mode 100644 index 0000000..67a2f94 --- /dev/null +++ b/telnetd/sys_term.c @@ -0,0 +1,2303 @@ +/* + * Copyright (c) 1989, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)sys_term.c 8.4+1 (Berkeley) 5/30/95"; +#endif /* not lint */ + +#include "telnetd.h" +#include "pathnames.h" + +#if defined(AUTHENTICATION) +#include +#endif + +#if defined(CRAY) || defined(__hpux) +# define PARENT_DOES_UTMP +#endif + +#ifdef NEWINIT +#include +int utmp_len = MAXHOSTNAMELEN; /* sizeof(init_request.host) */ +#else /* NEWINIT*/ +# ifdef UTMPX +# include +struct utmpx wtmp; +# else +# include +struct utmp wtmp; +# endif /* UTMPX */ + +int utmp_len = sizeof(wtmp.ut_host); +# ifndef PARENT_DOES_UTMP +char wtmpf[] = "/usr/adm/wtmp"; +char utmpf[] = "/etc/utmp"; +# else /* PARENT_DOES_UTMP */ +char wtmpf[] = "/etc/wtmp"; +# endif /* PARENT_DOES_UTMP */ + +# ifdef CRAY +#include +#include +# if (UNICOS_LVL == '7.0') || (UNICOS_LVL == '7.1') +# define UNICOS7x +# endif + +# ifdef UNICOS7x +#include +#include +extern int secflag; +extern struct sysv sysv; +# endif /* UNICOS7x */ +# endif /* CRAY */ +#endif /* NEWINIT */ + +#ifdef STREAMSPTY +#include +#include +#endif + +#define SCPYN(a, b) (void) strncpy(a, b, sizeof(a)) +#define SCMPN(a, b) strncmp(a, b, sizeof(a)) + +#ifdef STREAMS +#include +#endif +#ifdef __hpux +#include +#include +#endif +#include +#ifdef t_erase +#undef t_erase +#undef t_kill +#undef t_intrc +#undef t_quitc +#undef t_startc +#undef t_stopc +#undef t_eofc +#undef t_brkc +#undef t_suspc +#undef t_dsuspc +#undef t_rprntc +#undef t_flushc +#undef t_werasc +#undef t_lnextc +#endif + +#if defined(UNICOS5) && defined(CRAY2) && !defined(EXTPROC) +# define EXTPROC 0400 +#endif + +#ifndef USE_TERMIO +struct termbuf { + struct sgttyb sg; + struct tchars tc; + struct ltchars ltc; + int state; + int lflags; +} termbuf, termbuf2; +# define cfsetospeed(tp, val) (tp)->sg.sg_ospeed = (val) +# define cfsetispeed(tp, val) (tp)->sg.sg_ispeed = (val) +# define cfgetospeed(tp) (tp)->sg.sg_ospeed +# define cfgetispeed(tp) (tp)->sg.sg_ispeed +#else /* USE_TERMIO */ +# ifdef SYSV_TERMIO +# define termios termio +# endif +# ifndef TCSANOW +# ifdef TCSETS +# define TCSANOW TCSETS +# define TCSADRAIN TCSETSW +# define tcgetattr(f, t) ioctl(f, TCGETS, (char *)t) +# else +# ifdef TCSETA +# define TCSANOW TCSETA +# define TCSADRAIN TCSETAW +# define tcgetattr(f, t) ioctl(f, TCGETA, (char *)t) +# else +# define TCSANOW TIOCSETA +# define TCSADRAIN TIOCSETAW +# define tcgetattr(f, t) ioctl(f, TIOCGETA, (char *)t) +# endif +# endif +# define tcsetattr(f, a, t) ioctl(f, a, t) +# define cfsetospeed(tp, val) (tp)->c_cflag &= ~CBAUD; \ + (tp)->c_cflag |= (val) +# define cfgetospeed(tp) ((tp)->c_cflag & CBAUD) +# ifdef CIBAUD +# define cfsetispeed(tp, val) (tp)->c_cflag &= ~CIBAUD; \ + (tp)->c_cflag |= ((val)<c_cflag & CIBAUD)>>IBSHIFT) +# else +# define cfsetispeed(tp, val) (tp)->c_cflag &= ~CBAUD; \ + (tp)->c_cflag |= (val) +# define cfgetispeed(tp) ((tp)->c_cflag & CBAUD) +# endif +# endif /* TCSANOW */ +struct termios termbuf, termbuf2; /* pty control structure */ +# ifdef STREAMSPTY +int ttyfd = -1; +# endif +#endif /* USE_TERMIO */ + +/* + * init_termbuf() + * copy_termbuf(cp) + * set_termbuf() + * + * These three routines are used to get and set the "termbuf" structure + * to and from the kernel. init_termbuf() gets the current settings. + * copy_termbuf() hands in a new "termbuf" to write to the kernel, and + * set_termbuf() writes the structure into the kernel. + */ + + void +init_termbuf() +{ +#ifndef USE_TERMIO + (void) ioctl(pty, TIOCGETP, (char *)&termbuf.sg); + (void) ioctl(pty, TIOCGETC, (char *)&termbuf.tc); + (void) ioctl(pty, TIOCGLTC, (char *)&termbuf.ltc); +# ifdef TIOCGSTATE + (void) ioctl(pty, TIOCGSTATE, (char *)&termbuf.state); +# endif +#else +# ifdef STREAMSPTY + (void) tcgetattr(ttyfd, &termbuf); +# else + (void) tcgetattr(pty, &termbuf); +# endif +#endif + termbuf2 = termbuf; +} + +#if defined(LINEMODE) && defined(TIOCPKT_IOCTL) + void +copy_termbuf(cp, len) + char *cp; + int len; +{ + if (len > sizeof(termbuf)) + len = sizeof(termbuf); + memmove((char *)&termbuf, cp, len); + termbuf2 = termbuf; +} +#endif /* defined(LINEMODE) && defined(TIOCPKT_IOCTL) */ + + void +set_termbuf() +{ + /* + * Only make the necessary changes. + */ +#ifndef USE_TERMIO + if (memcmp((char *)&termbuf.sg, (char *)&termbuf2.sg, + sizeof(termbuf.sg))) + (void) ioctl(pty, TIOCSETN, (char *)&termbuf.sg); + if (memcmp((char *)&termbuf.tc, (char *)&termbuf2.tc, + sizeof(termbuf.tc))) + (void) ioctl(pty, TIOCSETC, (char *)&termbuf.tc); + if (memcmp((char *)&termbuf.ltc, (char *)&termbuf2.ltc, + sizeof(termbuf.ltc))) + (void) ioctl(pty, TIOCSLTC, (char *)&termbuf.ltc); + if (termbuf.lflags != termbuf2.lflags) + (void) ioctl(pty, TIOCLSET, (char *)&termbuf.lflags); +#else /* USE_TERMIO */ + if (memcmp((char *)&termbuf, (char *)&termbuf2, sizeof(termbuf))) +# ifdef STREAMSPTY + (void) tcsetattr(ttyfd, TCSANOW, &termbuf); +# else + (void) tcsetattr(pty, TCSANOW, &termbuf); +# endif +# if defined(CRAY2) && defined(UNICOS5) + needtermstat = 1; +# endif +#endif /* USE_TERMIO */ +} + + +/* + * spcset(func, valp, valpp) + * + * This function takes various special characters (func), and + * sets *valp to the current value of that character, and + * *valpp to point to where in the "termbuf" structure that + * value is kept. + * + * It returns the SLC_ level of support for this function. + */ + +#ifndef USE_TERMIO + int +spcset(func, valp, valpp) + int func; + cc_t *valp; + cc_t **valpp; +{ + switch(func) { + case SLC_EOF: + *valp = termbuf.tc.t_eofc; + *valpp = (cc_t *)&termbuf.tc.t_eofc; + return(SLC_VARIABLE); + case SLC_EC: + *valp = termbuf.sg.sg_erase; + *valpp = (cc_t *)&termbuf.sg.sg_erase; + return(SLC_VARIABLE); + case SLC_EL: + *valp = termbuf.sg.sg_kill; + *valpp = (cc_t *)&termbuf.sg.sg_kill; + return(SLC_VARIABLE); + case SLC_IP: + *valp = termbuf.tc.t_intrc; + *valpp = (cc_t *)&termbuf.tc.t_intrc; + return(SLC_VARIABLE|SLC_FLUSHIN|SLC_FLUSHOUT); + case SLC_ABORT: + *valp = termbuf.tc.t_quitc; + *valpp = (cc_t *)&termbuf.tc.t_quitc; + return(SLC_VARIABLE|SLC_FLUSHIN|SLC_FLUSHOUT); + case SLC_XON: + *valp = termbuf.tc.t_startc; + *valpp = (cc_t *)&termbuf.tc.t_startc; + return(SLC_VARIABLE); + case SLC_XOFF: + *valp = termbuf.tc.t_stopc; + *valpp = (cc_t *)&termbuf.tc.t_stopc; + return(SLC_VARIABLE); + case SLC_AO: + *valp = termbuf.ltc.t_flushc; + *valpp = (cc_t *)&termbuf.ltc.t_flushc; + return(SLC_VARIABLE); + case SLC_SUSP: + *valp = termbuf.ltc.t_suspc; + *valpp = (cc_t *)&termbuf.ltc.t_suspc; + return(SLC_VARIABLE); + case SLC_EW: + *valp = termbuf.ltc.t_werasc; + *valpp = (cc_t *)&termbuf.ltc.t_werasc; + return(SLC_VARIABLE); + case SLC_RP: + *valp = termbuf.ltc.t_rprntc; + *valpp = (cc_t *)&termbuf.ltc.t_rprntc; + return(SLC_VARIABLE); + case SLC_LNEXT: + *valp = termbuf.ltc.t_lnextc; + *valpp = (cc_t *)&termbuf.ltc.t_lnextc; + return(SLC_VARIABLE); + case SLC_FORW1: + *valp = termbuf.tc.t_brkc; + *valpp = (cc_t *)&termbuf.ltc.t_lnextc; + return(SLC_VARIABLE); + case SLC_BRK: + case SLC_SYNCH: + case SLC_AYT: + case SLC_EOR: + *valp = (cc_t)0; + *valpp = (cc_t *)0; + return(SLC_DEFAULT); + default: + *valp = (cc_t)0; + *valpp = (cc_t *)0; + return(SLC_NOSUPPORT); + } +} + +#else /* USE_TERMIO */ + + int +spcset(func, valp, valpp) + int func; + cc_t *valp; + cc_t **valpp; +{ + +#define setval(a, b) *valp = termbuf.c_cc[a]; \ + *valpp = &termbuf.c_cc[a]; \ + return(b); +#define defval(a) *valp = ((cc_t)a); *valpp = (cc_t *)0; return(SLC_DEFAULT); + + switch(func) { + case SLC_EOF: + setval(VEOF, SLC_VARIABLE); + case SLC_EC: + setval(VERASE, SLC_VARIABLE); + case SLC_EL: + setval(VKILL, SLC_VARIABLE); + case SLC_IP: + setval(VINTR, SLC_VARIABLE|SLC_FLUSHIN|SLC_FLUSHOUT); + case SLC_ABORT: + setval(VQUIT, SLC_VARIABLE|SLC_FLUSHIN|SLC_FLUSHOUT); + case SLC_XON: +#ifdef VSTART + setval(VSTART, SLC_VARIABLE); +#else + defval(0x13); +#endif + case SLC_XOFF: +#ifdef VSTOP + setval(VSTOP, SLC_VARIABLE); +#else + defval(0x11); +#endif + case SLC_EW: +#ifdef VWERASE + setval(VWERASE, SLC_VARIABLE); +#else + defval(0); +#endif + case SLC_RP: +#ifdef VREPRINT + setval(VREPRINT, SLC_VARIABLE); +#else + defval(0); +#endif + case SLC_LNEXT: +#ifdef VLNEXT + setval(VLNEXT, SLC_VARIABLE); +#else + defval(0); +#endif + case SLC_AO: +#if !defined(VDISCARD) && defined(VFLUSHO) +# define VDISCARD VFLUSHO +#endif +#ifdef VDISCARD + setval(VDISCARD, SLC_VARIABLE|SLC_FLUSHOUT); +#else + defval(0); +#endif + case SLC_SUSP: +#ifdef VSUSP + setval(VSUSP, SLC_VARIABLE|SLC_FLUSHIN); +#else + defval(0); +#endif +#ifdef VEOL + case SLC_FORW1: + setval(VEOL, SLC_VARIABLE); +#endif +#ifdef VEOL2 + case SLC_FORW2: + setval(VEOL2, SLC_VARIABLE); +#endif + case SLC_AYT: +#ifdef VSTATUS + setval(VSTATUS, SLC_VARIABLE); +#else + defval(0); +#endif + + case SLC_BRK: + case SLC_SYNCH: + case SLC_EOR: + defval(0); + + default: + *valp = 0; + *valpp = 0; + return(SLC_NOSUPPORT); + } +} +#endif /* USE_TERMIO */ + +#ifdef CRAY +/* + * getnpty() + * + * Return the number of pty's configured into the system. + */ + int +getnpty() +{ +#ifdef _SC_CRAY_NPTY + int numptys; + + if ((numptys = sysconf(_SC_CRAY_NPTY)) != -1) + return numptys; + else +#endif /* _SC_CRAY_NPTY */ + return 128; +} +#endif /* CRAY */ + +#ifndef convex +/* + * getpty() + * + * Allocate a pty. As a side effect, the external character + * array "line" contains the name of the slave side. + * + * Returns the file descriptor of the opened pty. + */ +#ifndef __GNUC__ +char *line = "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"; +#else +static char Xline[] = "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"; +char *line = Xline; +#endif +#ifdef CRAY +char *myline = "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"; +#endif /* CRAY */ + + int +getpty(ptynum) +int *ptynum; +{ + register int p; +#ifdef STREAMSPTY + int t; + char *ptsname(); + + p = open("/dev/ptmx", 2); + if (p > 0) { + grantpt(p); + unlockpt(p); + strcpy(line, ptsname(p)); + return(p); + } + +#else /* ! STREAMSPTY */ +#ifndef CRAY + register char *cp, *p1, *p2; + register int i; +#if defined(sun) && defined(TIOCGPGRP) && BSD < 199207 + int dummy; +#endif + +#ifndef __hpux + (void) sprintf(line, "/dev/ptyXX"); + p1 = &line[8]; + p2 = &line[9]; +#else + (void) sprintf(line, "/dev/ptym/ptyXX"); + p1 = &line[13]; + p2 = &line[14]; +#endif + + for (cp = "pqrstuvwxyzPQRST"; *cp; cp++) { + struct stat stb; + + *p1 = *cp; + *p2 = '0'; + /* + * This stat() check is just to keep us from + * looping through all 256 combinations if there + * aren't that many ptys available. + */ + if (stat(line, &stb) < 0) + break; + for (i = 0; i < 16; i++) { + *p2 = "0123456789abcdef"[i]; + p = open(line, 2); + if (p > 0) { +#ifndef __hpux + line[5] = 't'; +#else + for (p1 = &line[8]; *p1; p1++) + *p1 = *(p1+1); + line[9] = 't'; +#endif + chown(line, 0, 0); + chmod(line, 0600); +#if defined(sun) && defined(TIOCGPGRP) && BSD < 199207 + if (ioctl(p, TIOCGPGRP, &dummy) == 0 + || errno != EIO) { + chmod(line, 0666); + close(p); + line[5] = 'p'; + } else +#endif /* defined(sun) && defined(TIOCGPGRP) && BSD < 199207 */ + return(p); + } + } + } +#else /* CRAY */ + extern lowpty, highpty; + struct stat sb; + + for (*ptynum = lowpty; *ptynum <= highpty; (*ptynum)++) { + (void) sprintf(myline, "/dev/pty/%03d", *ptynum); + p = open(myline, 2); + if (p < 0) + continue; + (void) sprintf(line, "/dev/ttyp%03d", *ptynum); + /* + * Here are some shenanigans to make sure that there + * are no listeners lurking on the line. + */ + if(stat(line, &sb) < 0) { + (void) close(p); + continue; + } + if(sb.st_uid || sb.st_gid || sb.st_mode != 0600) { + chown(line, 0, 0); + chmod(line, 0600); + (void)close(p); + p = open(myline, 2); + if (p < 0) + continue; + } + /* + * Now it should be safe...check for accessability. + */ + if (access(line, 6) == 0) + return(p); + else { + /* no tty side to pty so skip it */ + (void) close(p); + } + } +#endif /* CRAY */ +#endif /* STREAMSPTY */ + return(-1); +} +#endif /* convex */ + +#ifdef LINEMODE +/* + * tty_flowmode() Find out if flow control is enabled or disabled. + * tty_linemode() Find out if linemode (external processing) is enabled. + * tty_setlinemod(on) Turn on/off linemode. + * tty_isecho() Find out if echoing is turned on. + * tty_setecho(on) Enable/disable character echoing. + * tty_israw() Find out if terminal is in RAW mode. + * tty_binaryin(on) Turn on/off BINARY on input. + * tty_binaryout(on) Turn on/off BINARY on output. + * tty_isediting() Find out if line editing is enabled. + * tty_istrapsig() Find out if signal trapping is enabled. + * tty_setedit(on) Turn on/off line editing. + * tty_setsig(on) Turn on/off signal trapping. + * tty_issofttab() Find out if tab expansion is enabled. + * tty_setsofttab(on) Turn on/off soft tab expansion. + * tty_islitecho() Find out if typed control chars are echoed literally + * tty_setlitecho() Turn on/off literal echo of control chars + * tty_tspeed(val) Set transmit speed to val. + * tty_rspeed(val) Set receive speed to val. + */ + +#ifdef convex +static int linestate; +#endif + + int +tty_linemode() +{ +#ifndef convex +#ifndef USE_TERMIO + return(termbuf.state & TS_EXTPROC); +#else + return(termbuf.c_lflag & EXTPROC); +#endif +#else + return(linestate); +#endif +} + + void +tty_setlinemode(on) + int on; +{ +#ifdef TIOCEXT +# ifndef convex + set_termbuf(); +# else + linestate = on; +# endif + (void) ioctl(pty, TIOCEXT, (char *)&on); +# ifndef convex + init_termbuf(); +# endif +#else /* !TIOCEXT */ +# ifdef EXTPROC + if (on) + termbuf.c_lflag |= EXTPROC; + else + termbuf.c_lflag &= ~EXTPROC; +# endif +#endif /* TIOCEXT */ +} +#endif /* LINEMODE */ + + int +tty_isecho() +{ +#ifndef USE_TERMIO + return (termbuf.sg.sg_flags & ECHO); +#else + return (termbuf.c_lflag & ECHO); +#endif +} + + int +tty_flowmode() +{ +#ifndef USE_TERMIO + return(((termbuf.tc.t_startc) > 0 && (termbuf.tc.t_stopc) > 0) ? 1 : 0); +#else + return((termbuf.c_iflag & IXON) ? 1 : 0); +#endif +} + + int +tty_restartany() +{ +#ifndef USE_TERMIO +# ifdef DECCTQ + return((termbuf.lflags & DECCTQ) ? 0 : 1); +# else + return(-1); +# endif +#else + return((termbuf.c_iflag & IXANY) ? 1 : 0); +#endif +} + + void +tty_setecho(on) + int on; +{ +#ifndef USE_TERMIO + if (on) + termbuf.sg.sg_flags |= ECHO|CRMOD; + else + termbuf.sg.sg_flags &= ~(ECHO|CRMOD); +#else + if (on) + termbuf.c_lflag |= ECHO; + else + termbuf.c_lflag &= ~ECHO; +#endif +} + + int +tty_israw() +{ +#ifndef USE_TERMIO + return(termbuf.sg.sg_flags & RAW); +#else + return(!(termbuf.c_lflag & ICANON)); +#endif +} + +#if defined (AUTHENTICATION) && defined(NO_LOGIN_F) && defined(LOGIN_R) + int +tty_setraw(on) +{ +# ifndef USE_TERMIO + if (on) + termbuf.sg.sg_flags |= RAW; + else + termbuf.sg.sg_flags &= ~RAW; +# else + if (on) + termbuf.c_lflag &= ~ICANON; + else + termbuf.c_lflag |= ICANON; +# endif +} +#endif + + void +tty_binaryin(on) + int on; +{ +#ifndef USE_TERMIO + if (on) + termbuf.lflags |= LPASS8; + else + termbuf.lflags &= ~LPASS8; +#else + if (on) { + termbuf.c_iflag &= ~ISTRIP; + } else { + termbuf.c_iflag |= ISTRIP; + } +#endif +} + + void +tty_binaryout(on) + int on; +{ +#ifndef USE_TERMIO + if (on) + termbuf.lflags |= LLITOUT; + else + termbuf.lflags &= ~LLITOUT; +#else + if (on) { + termbuf.c_cflag &= ~(CSIZE|PARENB); + termbuf.c_cflag |= CS8; + termbuf.c_oflag &= ~OPOST; + } else { + termbuf.c_cflag &= ~CSIZE; + termbuf.c_cflag |= CS7|PARENB; + termbuf.c_oflag |= OPOST; + } +#endif +} + + int +tty_isbinaryin() +{ +#ifndef USE_TERMIO + return(termbuf.lflags & LPASS8); +#else + return(!(termbuf.c_iflag & ISTRIP)); +#endif +} + + int +tty_isbinaryout() +{ +#ifndef USE_TERMIO + return(termbuf.lflags & LLITOUT); +#else + return(!(termbuf.c_oflag&OPOST)); +#endif +} + +#ifdef LINEMODE + int +tty_isediting() +{ +#ifndef USE_TERMIO + return(!(termbuf.sg.sg_flags & (CBREAK|RAW))); +#else + return(termbuf.c_lflag & ICANON); +#endif +} + + int +tty_istrapsig() +{ +#ifndef USE_TERMIO + return(!(termbuf.sg.sg_flags&RAW)); +#else + return(termbuf.c_lflag & ISIG); +#endif +} + + void +tty_setedit(on) + int on; +{ +#ifndef USE_TERMIO + if (on) + termbuf.sg.sg_flags &= ~CBREAK; + else + termbuf.sg.sg_flags |= CBREAK; +#else + if (on) + termbuf.c_lflag |= ICANON; + else + termbuf.c_lflag &= ~ICANON; +#endif +} + + void +tty_setsig(on) + int on; +{ +#ifndef USE_TERMIO + if (on) + ; +#else + if (on) + termbuf.c_lflag |= ISIG; + else + termbuf.c_lflag &= ~ISIG; +#endif +} +#endif /* LINEMODE */ + + int +tty_issofttab() +{ +#ifndef USE_TERMIO + return (termbuf.sg.sg_flags & XTABS); +#else +# ifdef OXTABS + return (termbuf.c_oflag & OXTABS); +# endif +# ifdef TABDLY + return ((termbuf.c_oflag & TABDLY) == TAB3); +# endif +#endif +} + + void +tty_setsofttab(on) + int on; +{ +#ifndef USE_TERMIO + if (on) + termbuf.sg.sg_flags |= XTABS; + else + termbuf.sg.sg_flags &= ~XTABS; +#else + if (on) { +# ifdef OXTABS + termbuf.c_oflag |= OXTABS; +# endif +# ifdef TABDLY + termbuf.c_oflag &= ~TABDLY; + termbuf.c_oflag |= TAB3; +# endif + } else { +# ifdef OXTABS + termbuf.c_oflag &= ~OXTABS; +# endif +# ifdef TABDLY + termbuf.c_oflag &= ~TABDLY; + termbuf.c_oflag |= TAB0; +# endif + } +#endif +} + + int +tty_islitecho() +{ +#ifndef USE_TERMIO + return (!(termbuf.lflags & LCTLECH)); +#else +# ifdef ECHOCTL + return (!(termbuf.c_lflag & ECHOCTL)); +# endif +# ifdef TCTLECH + return (!(termbuf.c_lflag & TCTLECH)); +# endif +# if !defined(ECHOCTL) && !defined(TCTLECH) + return (0); /* assumes ctl chars are echoed '^x' */ +# endif +#endif +} + + void +tty_setlitecho(on) + int on; +{ +#ifndef USE_TERMIO + if (on) + termbuf.lflags &= ~LCTLECH; + else + termbuf.lflags |= LCTLECH; +#else +# ifdef ECHOCTL + if (on) + termbuf.c_lflag &= ~ECHOCTL; + else + termbuf.c_lflag |= ECHOCTL; +# endif +# ifdef TCTLECH + if (on) + termbuf.c_lflag &= ~TCTLECH; + else + termbuf.c_lflag |= TCTLECH; +# endif +#endif +} + + int +tty_iscrnl() +{ +#ifndef USE_TERMIO + return (termbuf.sg.sg_flags & CRMOD); +#else + return (termbuf.c_iflag & ICRNL); +#endif +} + +/* + * Try to guess whether speeds are "encoded" (4.2BSD) or just numeric (4.4BSD). + */ +#if B4800 != 4800 +#define DECODE_BAUD +#endif + +#ifdef DECODE_BAUD + +/* + * A table of available terminal speeds + */ +struct termspeeds { + int speed; + int value; +} termspeeds[] = { + { 0, B0 }, { 50, B50 }, { 75, B75 }, + { 110, B110 }, { 134, B134 }, { 150, B150 }, + { 200, B200 }, { 300, B300 }, { 600, B600 }, + { 1200, B1200 }, { 1800, B1800 }, { 2400, B2400 }, + { 4800, B4800 }, +#ifdef B7200 + { 7200, B7200 }, +#endif + { 9600, B9600 }, +#ifdef B14400 + { 14400, B14400 }, +#endif +#ifdef B19200 + { 19200, B19200 }, +#endif +#ifdef B28800 + { 28800, B28800 }, +#endif +#ifdef B38400 + { 38400, B38400 }, +#endif +#ifdef B57600 + { 57600, B57600 }, +#endif +#ifdef B115200 + { 115200, B115200 }, +#endif +#ifdef B230400 + { 230400, B230400 }, +#endif + { -1, 0 } +}; +#endif /* DECODE_BUAD */ + + void +tty_tspeed(val) + int val; +{ +#ifdef DECODE_BAUD + register struct termspeeds *tp; + + for (tp = termspeeds; (tp->speed != -1) && (val > tp->speed); tp++) + ; + if (tp->speed == -1) /* back up to last valid value */ + --tp; + cfsetospeed(&termbuf, tp->value); +#else /* DECODE_BUAD */ + cfsetospeed(&termbuf, val); +#endif /* DECODE_BUAD */ +} + + void +tty_rspeed(val) + int val; +{ +#ifdef DECODE_BAUD + register struct termspeeds *tp; + + for (tp = termspeeds; (tp->speed != -1) && (val > tp->speed); tp++) + ; + if (tp->speed == -1) /* back up to last valid value */ + --tp; + cfsetispeed(&termbuf, tp->value); +#else /* DECODE_BAUD */ + cfsetispeed(&termbuf, val); +#endif /* DECODE_BAUD */ +} + +#if defined(CRAY2) && defined(UNICOS5) + int +tty_isnewmap() +{ + return((termbuf.c_oflag & OPOST) && (termbuf.c_oflag & ONLCR) && + !(termbuf.c_oflag & ONLRET)); +} +#endif + +#ifdef PARENT_DOES_UTMP +# ifndef NEWINIT +extern struct utmp wtmp; +extern char wtmpf[]; +# else /* NEWINIT */ +int gotalarm; + + /* ARGSUSED */ + void +nologinproc(sig) + int sig; +{ + gotalarm++; +} +# endif /* NEWINIT */ +#endif /* PARENT_DOES_UTMP */ + +#ifndef NEWINIT +# ifdef PARENT_DOES_UTMP +extern void utmp_sig_init P((void)); +extern void utmp_sig_reset P((void)); +extern void utmp_sig_wait P((void)); +extern void utmp_sig_notify P((int)); +# endif /* PARENT_DOES_UTMP */ +#endif + +/* + * getptyslave() + * + * Open the slave side of the pty, and do any initialization + * that is necessary. The return value is a file descriptor + * for the slave side. + */ + int +getptyslave() +{ + register int t = -1; + +#if !defined(CRAY) || !defined(NEWINIT) +# ifdef LINEMODE + int waslm; +# endif +# ifdef TIOCGWINSZ + struct winsize ws; + extern int def_row, def_col; +# endif + extern int def_tspeed, def_rspeed; + /* + * Opening the slave side may cause initilization of the + * kernel tty structure. We need remember the state of + * if linemode was turned on + * terminal window size + * terminal speed + * so that we can re-set them if we need to. + */ +# ifdef LINEMODE + waslm = tty_linemode(); +# endif + + + /* + * Make sure that we don't have a controlling tty, and + * that we are the session (process group) leader. + */ +# ifdef TIOCNOTTY + t = open(_PATH_TTY, O_RDWR); + if (t >= 0) { + (void) ioctl(t, TIOCNOTTY, (char *)0); + (void) close(t); + } +# endif + + +# ifdef PARENT_DOES_UTMP + /* + * Wait for our parent to get the utmp stuff to get done. + */ + utmp_sig_wait(); +# endif + + t = cleanopen(line); + if (t < 0) + fatalperror(net, line); + +#ifdef STREAMSPTY +#ifdef USE_TERMIO + ttyfd = t; +#endif + if (ioctl(t, I_PUSH, "ptem") < 0) + fatal(net, "I_PUSH ptem"); + if (ioctl(t, I_PUSH, "ldterm") < 0) + fatal(net, "I_PUSH ldterm"); + if (ioctl(t, I_PUSH, "ttcompat") < 0) + fatal(net, "I_PUSH ttcompat"); + if (ioctl(pty, I_PUSH, "pckt") < 0) + fatal(net, "I_PUSH pckt"); +#endif + + /* + * set up the tty modes as we like them to be. + */ + init_termbuf(); +# ifdef TIOCGWINSZ + if (def_row || def_col) { + memset((char *)&ws, 0, sizeof(ws)); + ws.ws_col = def_col; + ws.ws_row = def_row; + (void)ioctl(t, TIOCSWINSZ, (char *)&ws); + } +# endif + + /* + * Settings for sgtty based systems + */ +# ifndef USE_TERMIO + termbuf.sg.sg_flags |= CRMOD|ANYP|ECHO|XTABS; +# endif /* USE_TERMIO */ + + /* + * Settings for UNICOS (and HPUX) + */ +# if defined(CRAY) || defined(__hpux) + termbuf.c_oflag = OPOST|ONLCR|TAB3; + termbuf.c_iflag = IGNPAR|ISTRIP|ICRNL|IXON; + termbuf.c_lflag = ISIG|ICANON|ECHO|ECHOE|ECHOK; + termbuf.c_cflag = EXTB|HUPCL|CS8; +# endif + + /* + * Settings for all other termios/termio based + * systems, other than 4.4BSD. In 4.4BSD the + * kernel does the initial terminal setup. + */ +# if defined(USE_TERMIO) && !(defined(CRAY) || defined(__hpux)) && (BSD <= 43) +# ifndef OXTABS +# define OXTABS 0 +# endif + termbuf.c_lflag |= ECHO; + termbuf.c_oflag |= ONLCR|OXTABS; + termbuf.c_iflag |= ICRNL; + termbuf.c_iflag &= ~IXOFF; +# endif /* defined(USE_TERMIO) && !defined(CRAY) && (BSD <= 43) */ + tty_rspeed((def_rspeed > 0) ? def_rspeed : 9600); + tty_tspeed((def_tspeed > 0) ? def_tspeed : 9600); +# ifdef LINEMODE + if (waslm) + tty_setlinemode(1); +# endif /* LINEMODE */ + + /* + * Set the tty modes, and make this our controlling tty. + */ + set_termbuf(); + if (login_tty(t) == -1) + fatalperror(net, "login_tty"); +#endif /* !defined(CRAY) || !defined(NEWINIT) */ + if (net > 2) + (void) close(net); +#if defined(AUTHENTICATION) && defined(NO_LOGIN_F) && defined(LOGIN_R) + /* + * Leave the pty open so that we can write out the rlogin + * protocol for /bin/login, if the authentication works. + */ +#else + if (pty > 2) { + (void) close(pty); + pty = -1; + } +#endif +} + +#if !defined(CRAY) || !defined(NEWINIT) +#ifndef O_NOCTTY +#define O_NOCTTY 0 +#endif +/* + * Open the specified slave side of the pty, + * making sure that we have a clean tty. + */ + int +cleanopen(line) + char *line; +{ + register int t; +#ifdef UNICOS7x + struct secstat secbuf; +#endif /* UNICOS7x */ + +#ifndef STREAMSPTY + /* + * Make sure that other people can't open the + * slave side of the connection. + */ + (void) chown(line, 0, 0); + (void) chmod(line, 0600); +#endif + +# if !defined(CRAY) && (BSD > 43) + (void) revoke(line); +# endif +#ifdef UNICOS7x + if (secflag) { + if (secstat(line, &secbuf) < 0) + return(-1); + if (setulvl(secbuf.st_slevel) < 0) + return(-1); + if (setucmp(secbuf.st_compart) < 0) + return(-1); + } +#endif /* UNICOS7x */ + + t = open(line, O_RDWR|O_NOCTTY); + +#ifdef UNICOS7x + if (secflag) { + if (setulvl(sysv.sy_minlvl) < 0) + return(-1); + if (setucmp(0) < 0) + return(-1); + } +#endif /* UNICOS7x */ + + if (t < 0) + return(-1); + + /* + * Hangup anybody else using this ttyp, then reopen it for + * ourselves. + */ +# if !(defined(CRAY) || defined(__hpux)) && (BSD <= 43) && !defined(STREAMSPTY) + (void) signal(SIGHUP, SIG_IGN); + vhangup(); + (void) signal(SIGHUP, SIG_DFL); + t = open(line, O_RDWR|O_NOCTTY); + if (t < 0) + return(-1); +# endif +# if defined(CRAY) && defined(TCVHUP) + { + register int i; + (void) signal(SIGHUP, SIG_IGN); + (void) ioctl(t, TCVHUP, (char *)0); + (void) signal(SIGHUP, SIG_DFL); + +#ifdef UNICOS7x + if (secflag) { + if (secstat(line, &secbuf) < 0) + return(-1); + if (setulvl(secbuf.st_slevel) < 0) + return(-1); + if (setucmp(secbuf.st_compart) < 0) + return(-1); + } +#endif /* UNICOS7x */ + + i = open(line, O_RDWR); + +#ifdef UNICOS7x + if (secflag) { + if (setulvl(sysv.sy_minlvl) < 0) + return(-1); + if (setucmp(0) < 0) + return(-1); + } +#endif /* UNICOS7x */ + + if (i < 0) + return(-1); + (void) close(t); + t = i; + } +# endif /* defined(CRAY) && defined(TCVHUP) */ + return(t); +} +#endif /* !defined(CRAY) || !defined(NEWINIT) */ + +#if BSD <= 43 + + int +login_tty(t) + int t; +{ + if (setsid() < 0) { +#ifdef ultrix + /* + * The setsid() may have failed because we + * already have a pgrp == pid. Zero out + * our pgrp and try again... + */ + if ((setpgrp(0, 0) < 0) || (setsid() < 0)) +#endif + fatalperror(net, "setsid()"); + } +# ifdef TIOCSCTTY + if (ioctl(t, TIOCSCTTY, (char *)0) < 0) + fatalperror(net, "ioctl(sctty)"); +# if defined(CRAY) + /* + * Close the hard fd to /dev/ttypXXX, and re-open through + * the indirect /dev/tty interface. + */ + close(t); + if ((t = open("/dev/tty", O_RDWR)) < 0) + fatalperror(net, "open(/dev/tty)"); +# endif +# else + /* + * We get our controlling tty assigned as a side-effect + * of opening up a tty device. But on BSD based systems, + * this only happens if our process group is zero. The + * setsid() call above may have set our pgrp, so clear + * it out before opening the tty... + */ +# ifndef SOLARIS + (void) setpgrp(0, 0); +# else + (void) setpgrp(); +# endif + close(open(line, O_RDWR)); +# endif + if (t != 0) + (void) dup2(t, 0); + if (t != 1) + (void) dup2(t, 1); + if (t != 2) + (void) dup2(t, 2); + if (t > 2) + close(t); + return(0); +} +#endif /* BSD <= 43 */ + +#ifdef NEWINIT +char *gen_id = "fe"; +#endif + +/* + * startslave(host) + * + * Given a hostname, do whatever + * is necessary to startup the login process on the slave side of the pty. + */ + +/* ARGSUSED */ + void +startslave(host, autologin, autoname) + char *host; + int autologin; + char *autoname; +{ + register int i; + long time(); + char name[256]; +#ifdef NEWINIT + extern char *ptyip; + struct init_request request; + void nologinproc(); + register int n; +#endif /* NEWINIT */ + +#if defined(AUTHENTICATION) + if (!autoname || !autoname[0]) + autologin = 0; + + if (autologin < auth_level) { + fatal(net, "Authorization failed"); + exit(1); + } +#endif + +#ifndef NEWINIT +# ifdef PARENT_DOES_UTMP + utmp_sig_init(); +# endif /* PARENT_DOES_UTMP */ + + if ((i = fork()) < 0) + fatalperror(net, "fork"); + if (i) { +# ifdef PARENT_DOES_UTMP + /* + * Cray parent will create utmp entry for child and send + * signal to child to tell when done. Child waits for signal + * before doing anything important. + */ + register int pid = i; + void sigjob P((int)); + + setpgrp(); + utmp_sig_reset(); /* reset handler to default */ + /* + * Create utmp entry for child + */ + (void) time(&wtmp.ut_time); + wtmp.ut_type = LOGIN_PROCESS; + wtmp.ut_pid = pid; + SCPYN(wtmp.ut_user, "LOGIN"); + SCPYN(wtmp.ut_host, host); + SCPYN(wtmp.ut_line, line + sizeof("/dev/") - 1); +#ifndef __hpux + SCPYN(wtmp.ut_id, wtmp.ut_line+3); +#else + SCPYN(wtmp.ut_id, wtmp.ut_line+7); +#endif + pututline(&wtmp); + endutent(); + if ((i = open(wtmpf, O_WRONLY|O_APPEND)) >= 0) { + (void) write(i, (char *)&wtmp, sizeof(struct utmp)); + (void) close(i); + } +#ifdef CRAY + (void) signal(WJSIGNAL, sigjob); +#endif + utmp_sig_notify(pid); +# endif /* PARENT_DOES_UTMP */ + } else { + getptyslave(autologin); + start_login(host, autologin, autoname); + /*NOTREACHED*/ + } +#else /* NEWINIT */ + + /* + * Init will start up login process if we ask nicely. We only wait + * for it to start up and begin normal telnet operation. + */ + if ((i = open(INIT_FIFO, O_WRONLY)) < 0) { + char tbuf[128]; + (void) sprintf(tbuf, "Can't open %s\n", INIT_FIFO); + fatalperror(net, tbuf); + } + memset((char *)&request, 0, sizeof(request)); + request.magic = INIT_MAGIC; + SCPYN(request.gen_id, gen_id); + SCPYN(request.tty_id, &line[8]); + SCPYN(request.host, host); + SCPYN(request.term_type, terminaltype ? terminaltype : "network"); +#if !defined(UNICOS5) + request.signal = SIGCLD; + request.pid = getpid(); +#endif +#ifdef BFTPDAEMON + /* + * Are we working as the bftp daemon? + */ + if (bftpd) { + SCPYN(request.exec_name, BFTPPATH); + } +#endif /* BFTPDAEMON */ + if (write(i, (char *)&request, sizeof(request)) < 0) { + char tbuf[128]; + (void) sprintf(tbuf, "Can't write to %s\n", INIT_FIFO); + fatalperror(net, tbuf); + } + (void) close(i); + (void) signal(SIGALRM, nologinproc); + for (i = 0; ; i++) { + char tbuf[128]; + alarm(15); + n = read(pty, ptyip, BUFSIZ); + if (i == 3 || n >= 0 || !gotalarm) + break; + gotalarm = 0; + sprintf(tbuf, "telnetd: waiting for /etc/init to start login process on %s\r\n", line); + (void) write(net, tbuf, strlen(tbuf)); + } + if (n < 0 && gotalarm) + fatal(net, "/etc/init didn't start login process"); + pcc += n; + alarm(0); + (void) signal(SIGALRM, SIG_DFL); + + return; +#endif /* NEWINIT */ +} + +char *envinit[3]; +extern char **environ; + + void +init_env() +{ + extern char *getenv(); + char **envp; + + envp = envinit; + if (*envp = getenv("TZ")) + *envp++ -= 3; +#if defined(CRAY) || defined(__hpux) + else + *envp++ = "TZ=GMT0"; +#endif + *envp = 0; + environ = envinit; +} + +#ifndef NEWINIT + +/* + * start_login(host) + * + * Assuming that we are now running as a child processes, this + * function will turn us into the login process. + */ + + void +start_login(host, autologin, name) + char *host; + int autologin; + char *name; +{ + register char *cp; + register char **argv; + char **addarg(); + extern char *getenv(); +#ifdef UTMPX + register int pid = getpid(); + struct utmpx utmpx; +#endif +#ifdef SOLARIS + char *term; + char termbuf[64]; +#endif + +#ifdef UTMPX + /* + * Create utmp entry for child + */ + + memset(&utmpx, 0, sizeof(utmpx)); + SCPYN(utmpx.ut_user, ".telnet"); + SCPYN(utmpx.ut_line, line + sizeof("/dev/") - 1); + utmpx.ut_pid = pid; + utmpx.ut_id[0] = 't'; + utmpx.ut_id[1] = 'n'; + utmpx.ut_id[2] = SC_WILDC; + utmpx.ut_id[3] = SC_WILDC; + utmpx.ut_type = LOGIN_PROCESS; + (void) time(&utmpx.ut_tv.tv_sec); + if (makeutx(&utmpx) == NULL) + fatal(net, "makeutx failed"); +#endif + + scrub_env(); + + /* + * -h : pass on name of host. + * WARNING: -h is accepted by login if and only if + * getuid() == 0. + * -p : don't clobber the environment (so terminal type stays set). + * + * -f : force this login, he has already been authenticated + */ + argv = addarg(0, "login"); + +#if !defined(NO_LOGIN_H) + +# if defined (AUTHENTICATION) && defined(NO_LOGIN_F) && defined(LOGIN_R) + /* + * Don't add the "-h host" option if we are going + * to be adding the "-r host" option down below... + */ + if ((auth_level < 0) || (autologin != AUTH_VALID)) +# endif + { + argv = addarg(argv, "-h"); + argv = addarg(argv, host); +#ifdef SOLARIS + /* + * SVR4 version of -h takes TERM= as second arg, or - + */ + term = getenv("TERM"); + if (term == NULL || term[0] == 0) { + term = "-"; + } else { + strcpy(termbuf, "TERM="); + strncat(termbuf, term, sizeof(termbuf) - 6); + term = termbuf; + } + argv = addarg(argv, term); +#endif + } +#endif +#if !defined(NO_LOGIN_P) + argv = addarg(argv, "-p"); +#endif +#ifdef LINEMODE + /* + * Set the environment variable "LINEMODE" to either + * "real" or "kludge" if we are operating in either + * real or kludge linemode. + */ + if (lmodetype == REAL_LINEMODE) + setenv("LINEMODE", "real", 1); +# ifdef KLUDGELINEMODE + else if (lmodetype == KLUDGE_LINEMODE || lmodetype == KLUDGE_OK) + setenv("LINEMODE", "kludge", 1); +# endif +#endif +#ifdef BFTPDAEMON + /* + * Are we working as the bftp daemon? If so, then ask login + * to start bftp instead of shell. + */ + if (bftpd) { + argv = addarg(argv, "-e"); + argv = addarg(argv, BFTPPATH); + } else +#endif +#if defined (SecurID) + /* + * don't worry about the -f that might get sent. + * A -s is supposed to override it anyhow. + */ + if (require_SecurID) + argv = addarg(argv, "-s"); +#endif +#if defined (AUTHENTICATION) + if (auth_level >= 0 && autologin == AUTH_VALID) { +# if !defined(NO_LOGIN_F) + argv = addarg(argv, "-f"); + argv = addarg(argv, name); +# else +# if defined(LOGIN_R) + /* + * We don't have support for "login -f", but we + * can fool /bin/login into thinking that we are + * rlogind, and allow us to log in without a + * password. The rlogin protocol expects + * local-user\0remote-user\0term/speed\0 + */ + + if (pty > 2) { + register char *cp; + char speed[128]; + int isecho, israw, xpty, len; + extern int def_rspeed; +# ifndef LOGIN_HOST + /* + * Tell login that we are coming from "localhost". + * If we passed in the real host name, then the + * user would have to allow .rhost access from + * every machine that they want authenticated + * access to work from, which sort of defeats + * the purpose of an authenticated login... + * So, we tell login that the session is coming + * from "localhost", and the user will only have + * to have "localhost" in their .rhost file. + */ +# define LOGIN_HOST "localhost" +# endif + argv = addarg(argv, "-r"); + argv = addarg(argv, LOGIN_HOST); + + xpty = pty; +# ifndef STREAMSPTY + pty = 0; +# else + ttyfd = 0; +# endif + init_termbuf(); + isecho = tty_isecho(); + israw = tty_israw(); + if (isecho || !israw) { + tty_setecho(0); /* Turn off echo */ + tty_setraw(1); /* Turn on raw */ + set_termbuf(); + } + len = strlen(name)+1; + write(xpty, name, len); + write(xpty, name, len); + sprintf(speed, "%s/%d", (cp = getenv("TERM")) ? cp : "", + (def_rspeed > 0) ? def_rspeed : 9600); + len = strlen(speed)+1; + write(xpty, speed, len); + + if (isecho || !israw) { + init_termbuf(); + tty_setecho(isecho); + tty_setraw(israw); + set_termbuf(); + if (!israw) { + /* + * Write a newline to ensure + * that login will be able to + * read the line... + */ + write(xpty, "\n", 1); + } + } + pty = xpty; + } +# else + argv = addarg(argv, name); +# endif +# endif + } else +#endif + if (getenv("USER")) { + argv = addarg(argv, getenv("USER")); +#if defined(LOGIN_ARGS) && defined(NO_LOGIN_P) + { + register char **cpp; + for (cpp = environ; *cpp; cpp++) + argv = addarg(argv, *cpp); + } +#endif + /* + * Assume that login will set the USER variable + * correctly. For SysV systems, this means that + * USER will no longer be set, just LOGNAME by + * login. (The problem is that if the auto-login + * fails, and the user then specifies a different + * account name, he can get logged in with both + * LOGNAME and USER in his environment, but the + * USER value will be wrong. + */ + unsetenv("USER"); + } +#ifdef SOLARIS + else { + char **p; + + argv = addarg(argv, ""); /* no login name */ + for (p = environ; *p; p++) { + argv = addarg(argv, *p); + } + } +#endif /* SOLARIS */ +#if defined(AUTHENTICATION) && defined(NO_LOGIN_F) && defined(LOGIN_R) + if (pty > 2) + close(pty); +#endif + closelog(); + /* + * This sleep(1) is in here so that telnetd can + * finish up with the tty. There's a race condition + * the login banner message gets lost... + */ + sleep(1); + execv(_PATH_LOGIN, argv); + + syslog(LOG_ERR, "%s: %m\n", _PATH_LOGIN); + fatalperror(net, _PATH_LOGIN); + /*NOTREACHED*/ +} + + char ** +addarg(argv, val) + register char **argv; + register char *val; +{ + register char **cpp; + + if (argv == NULL) { + /* + * 10 entries, a leading length, and a null + */ + argv = (char **)malloc(sizeof(*argv) * 12); + if (argv == NULL) + return(NULL); + *argv++ = (char *)10; + *argv = (char *)0; + } + for (cpp = argv; *cpp; cpp++) + ; + if (cpp == &argv[(int)argv[-1]]) { + --argv; + *argv = (char *)((int)(*argv) + 10); + argv = (char **)realloc(argv, sizeof(*argv)*((int)(*argv) + 2)); + if (argv == NULL) + return(NULL); + argv++; + cpp = &argv[(int)argv[-1] - 10]; + } + *cpp++ = val; + *cpp = 0; + return(argv); +} +#endif /* NEWINIT */ + +/* + * scrub_env() + * + * Remove a few things from the environment that + * don't need to be there. + */ +scrub_env() +{ + register char **cpp, **cpp2; + + for (cpp2 = cpp = environ; *cpp; cpp++) { + if (strncmp(*cpp, "LD_", 3) && + strncmp(*cpp, "_RLD_", 5) && + strncmp(*cpp, "LIBPATH=", 8) && + strncmp(*cpp, "IFS=", 4)) + *cpp2++ = *cpp; + } + *cpp2 = 0; +} + +/* + * cleanup() + * + * This is the routine to call when we are all through, to + * clean up anything that needs to be cleaned up. + */ + /* ARGSUSED */ + void +cleanup(sig) + int sig; +{ +#ifndef PARENT_DOES_UTMP +# if (BSD > 43) || defined(convex) + char *p; + + p = line + sizeof("/dev/") - 1; + if (logout(p)) + logwtmp(p, "", ""); + (void)chmod(line, 0666); + (void)chown(line, 0, 0); + *p = 'p'; + (void)chmod(line, 0666); + (void)chown(line, 0, 0); + (void) shutdown(net, 2); + exit(1); +# else + void rmut(); + + rmut(); + vhangup(); /* XXX */ + (void) shutdown(net, 2); + exit(1); +# endif +#else /* PARENT_DOES_UTMP */ +# ifdef NEWINIT + (void) shutdown(net, 2); + exit(1); +# else /* NEWINIT */ +# ifdef CRAY + static int incleanup = 0; + register int t; + int child_status; /* status of child process as returned by waitpid */ + int flags = WNOHANG|WUNTRACED; + + /* + * 1: Pick up the zombie, if we are being called + * as the signal handler. + * 2: If we are a nested cleanup(), return. + * 3: Try to clean up TMPDIR. + * 4: Fill in utmp with shutdown of process. + * 5: Close down the network and pty connections. + * 6: Finish up the TMPDIR cleanup, if needed. + */ + if (sig == SIGCHLD) { + while (waitpid(-1, &child_status, flags) > 0) + ; /* VOID */ + /* Check if the child process was stopped + * rather than exited. We want cleanup only if + * the child has died. + */ + if (WIFSTOPPED(child_status)) { + return; + } + } + t = sigblock(sigmask(SIGCHLD)); + if (incleanup) { + sigsetmask(t); + return; + } + incleanup = 1; + sigsetmask(t); +#ifdef UNICOS7x + if (secflag) { + /* + * We need to set ourselves back to a null + * label to clean up. + */ + + setulvl(sysv.sy_minlvl); + setucmp((long)0); + } +#endif /* UNICOS7x */ + + t = cleantmp(&wtmp); + setutent(); /* just to make sure */ +# endif /* CRAY */ + rmut(line); + close(pty); + (void) shutdown(net, 2); +# ifdef CRAY + if (t == 0) + cleantmp(&wtmp); +# endif /* CRAY */ + exit(1); +# endif /* NEWINT */ +#endif /* PARENT_DOES_UTMP */ +} + +#if defined(PARENT_DOES_UTMP) && !defined(NEWINIT) +/* + * _utmp_sig_rcv + * utmp_sig_init + * utmp_sig_wait + * These three functions are used to coordinate the handling of + * the utmp file between the server and the soon-to-be-login shell. + * The server actually creates the utmp structure, the child calls + * utmp_sig_wait(), until the server calls utmp_sig_notify() and + * signals the future-login shell to proceed. + */ +static int caught=0; /* NZ when signal intercepted */ +static void (*func)(); /* address of previous handler */ + + void +_utmp_sig_rcv(sig) + int sig; +{ + caught = 1; + (void) signal(SIGUSR1, func); +} + + void +utmp_sig_init() +{ + /* + * register signal handler for UTMP creation + */ + if ((int)(func = signal(SIGUSR1, _utmp_sig_rcv)) == -1) + fatalperror(net, "telnetd/signal"); +} + + void +utmp_sig_reset() +{ + (void) signal(SIGUSR1, func); /* reset handler to default */ +} + +# ifdef __hpux +# define sigoff() /* do nothing */ +# define sigon() /* do nothing */ +# endif + + void +utmp_sig_wait() +{ + /* + * Wait for parent to write our utmp entry. + */ + sigoff(); + while (caught == 0) { + pause(); /* wait until we get a signal (sigon) */ + sigoff(); /* turn off signals while we check caught */ + } + sigon(); /* turn on signals again */ +} + + void +utmp_sig_notify(pid) +{ + kill(pid, SIGUSR1); +} + +# ifdef CRAY +static int gotsigjob = 0; + + /*ARGSUSED*/ + void +sigjob(sig) + int sig; +{ + register int jid; + register struct jobtemp *jp; + + while ((jid = waitjob(NULL)) != -1) { + if (jid == 0) { + return; + } + gotsigjob++; + jobend(jid, NULL, NULL); + } +} + +/* + * jid_getutid: + * called by jobend() before calling cleantmp() + * to find the correct $TMPDIR to cleanup. + */ + + struct utmp * +jid_getutid(jid) + int jid; +{ + struct utmp *cur = NULL; + + setutent(); /* just to make sure */ + while (cur = getutent()) { + if ( (cur->ut_type != NULL) && (jid == cur->ut_jid) ) { + return(cur); + } + } + + return(0); +} + +/* + * Clean up the TMPDIR that login created. + * The first time this is called we pick up the info + * from the utmp. If the job has already gone away, + * then we'll clean up and be done. If not, then + * when this is called the second time it will wait + * for the signal that the job is done. + */ + int +cleantmp(wtp) + register struct utmp *wtp; +{ + struct utmp *utp; + static int first = 1; + register int mask, omask, ret; + extern struct utmp *getutid P((const struct utmp *_Id)); + + + mask = sigmask(WJSIGNAL); + + if (first == 0) { + omask = sigblock(mask); + while (gotsigjob == 0) + sigpause(omask); + return(1); + } + first = 0; + setutent(); /* just to make sure */ + + utp = getutid(wtp); + if (utp == 0) { + syslog(LOG_ERR, "Can't get /etc/utmp entry to clean TMPDIR"); + return(-1); + } + /* + * Nothing to clean up if the user shell was never started. + */ + if (utp->ut_type != USER_PROCESS || utp->ut_jid == 0) + return(1); + + /* + * Block the WJSIGNAL while we are in jobend(). + */ + omask = sigblock(mask); + ret = jobend(utp->ut_jid, utp->ut_tpath, utp->ut_user); + sigsetmask(omask); + return(ret); +} + + int +jobend(jid, path, user) + register int jid; + register char *path; + register char *user; +{ + static int saved_jid = 0; + static int pty_saved_jid = 0; + static char saved_path[sizeof(wtmp.ut_tpath)+1]; + static char saved_user[sizeof(wtmp.ut_user)+1]; + + /* + * this little piece of code comes into play + * only when ptyreconnect is used to reconnect + * to an previous session. + * + * this is the only time when the + * "saved_jid != jid" code is executed. + */ + + if ( saved_jid && saved_jid != jid ) { + if (!path) { /* called from signal handler */ + pty_saved_jid = jid; + } else { + pty_saved_jid = saved_jid; + } + } + + if (path) { + strncpy(saved_path, path, sizeof(wtmp.ut_tpath)); + strncpy(saved_user, user, sizeof(wtmp.ut_user)); + saved_path[sizeof(saved_path)] = '\0'; + saved_user[sizeof(saved_user)] = '\0'; + } + if (saved_jid == 0) { + saved_jid = jid; + return(0); + } + + /* if the jid has changed, get the correct entry from the utmp file */ + + if ( saved_jid != jid ) { + struct utmp *utp = NULL; + struct utmp *jid_getutid(); + + utp = jid_getutid(pty_saved_jid); + + if (utp == 0) { + syslog(LOG_ERR, "Can't get /etc/utmp entry to clean TMPDIR"); + return(-1); + } + + cleantmpdir(jid, utp->ut_tpath, utp->ut_user); + return(1); + } + + cleantmpdir(jid, saved_path, saved_user); + return(1); +} + +/* + * Fork a child process to clean up the TMPDIR + */ +cleantmpdir(jid, tpath, user) + register int jid; + register char *tpath; + register char *user; +{ + switch(fork()) { + case -1: + syslog(LOG_ERR, "TMPDIR cleanup(%s): fork() failed: %m\n", + tpath); + break; + case 0: + execl(CLEANTMPCMD, CLEANTMPCMD, user, tpath, 0); + syslog(LOG_ERR, "TMPDIR cleanup(%s): execl(%s) failed: %m\n", + tpath, CLEANTMPCMD); + exit(1); + default: + /* + * Forget about child. We will exit, and + * /etc/init will pick it up. + */ + break; + } +} +# endif /* CRAY */ +#endif /* defined(PARENT_DOES_UTMP) && !defined(NEWINIT) */ + +/* + * rmut() + * + * This is the function called by cleanup() to + * remove the utmp entry for this person. + */ + +#ifdef UTMPX + void +rmut() +{ + register f; + int found = 0; + struct utmp *u, *utmp; + int nutmp; + struct stat statbf; + + struct utmpx *utxp, utmpx; + + /* + * This updates the utmpx and utmp entries and make a wtmp/x entry + */ + + SCPYN(utmpx.ut_line, line + sizeof("/dev/") - 1); + utxp = getutxline(&utmpx); + if (utxp) { + utxp->ut_type = DEAD_PROCESS; + utxp->ut_exit.e_termination = 0; + utxp->ut_exit.e_exit = 0; + (void) time(&utmpx.ut_tv.tv_sec); + utmpx.ut_tv.tv_usec = 0; + modutx(utxp); + } + endutxent(); +} /* end of rmut */ +#endif + +#if !defined(UTMPX) && !(defined(CRAY) || defined(__hpux)) && BSD <= 43 + void +rmut() +{ + register f; + int found = 0; + struct utmp *u, *utmp; + int nutmp; + struct stat statbf; + + f = open(utmpf, O_RDWR); + if (f >= 0) { + (void) fstat(f, &statbf); + utmp = (struct utmp *)malloc((unsigned)statbf.st_size); + if (!utmp) + syslog(LOG_ERR, "utmp malloc failed"); + if (statbf.st_size && utmp) { + nutmp = read(f, (char *)utmp, (int)statbf.st_size); + nutmp /= sizeof(struct utmp); + + for (u = utmp ; u < &utmp[nutmp] ; u++) { + if (SCMPN(u->ut_line, line+5) || + u->ut_name[0]==0) + continue; + (void) lseek(f, ((long)u)-((long)utmp), L_SET); + SCPYN(u->ut_name, ""); + SCPYN(u->ut_host, ""); + (void) time(&u->ut_time); + (void) write(f, (char *)u, sizeof(wtmp)); + found++; + } + } + (void) close(f); + } + if (found) { + f = open(wtmpf, O_WRONLY|O_APPEND); + if (f >= 0) { + SCPYN(wtmp.ut_line, line+5); + SCPYN(wtmp.ut_name, ""); + SCPYN(wtmp.ut_host, ""); + (void) time(&wtmp.ut_time); + (void) write(f, (char *)&wtmp, sizeof(wtmp)); + (void) close(f); + } + } + (void) chmod(line, 0666); + (void) chown(line, 0, 0); + line[strlen("/dev/")] = 'p'; + (void) chmod(line, 0666); + (void) chown(line, 0, 0); +} /* end of rmut */ +#endif /* CRAY */ + +#ifdef __hpux +rmut (line) +char *line; +{ + struct utmp utmp; + struct utmp *utptr; + int fd; /* for /etc/wtmp */ + + utmp.ut_type = USER_PROCESS; + (void) strncpy(utmp.ut_id, line+12, sizeof(utmp.ut_id)); + (void) setutent(); + utptr = getutid(&utmp); + /* write it out only if it exists */ + if (utptr) { + utptr->ut_type = DEAD_PROCESS; + utptr->ut_time = time((long *) 0); + (void) pututline(utptr); + /* set wtmp entry if wtmp file exists */ + if ((fd = open(wtmpf, O_WRONLY | O_APPEND)) >= 0) { + (void) write(fd, utptr, sizeof(utmp)); + (void) close(fd); + } + } + (void) endutent(); + + (void) chmod(line, 0666); + (void) chown(line, 0, 0); + line[14] = line[13]; + line[13] = line[12]; + line[8] = 'm'; + line[9] = '/'; + line[10] = 'p'; + line[11] = 't'; + line[12] = 'y'; + (void) chmod(line, 0666); + (void) chown(line, 0, 0); +} +#endif diff --git a/telnetd/telnetd.8 b/telnetd/telnetd.8 new file mode 100644 index 0000000..f618385 --- /dev/null +++ b/telnetd/telnetd.8 @@ -0,0 +1,607 @@ +.\" Copyright (c) 1983, 1993 +.\" The Regents of the University of California. All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" 3. All advertising materials mentioning features or use of this software +.\" must display the following acknowledgement: +.\" This product includes software developed by the University of +.\" California, Berkeley and its contributors. +.\" 4. Neither the name of the University nor the names of its contributors +.\" may be used to endorse or promote products derived from this software +.\" without specific prior written permission. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND +.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE +.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +.\" SUCH DAMAGE. +.\" +.\" @(#)telnetd.8 8.4 (Berkeley) 6/1/94 +.\" +.Dd June 1, 1994 +.Dt TELNETD 8 +.Os BSD 4.2 +.Sh NAME +.Nm telnetd +.Nd DARPA +.Tn TELNET +protocol server +.Sh SYNOPSIS +.Nm /usr/libexec/telnetd +.Op Fl BUhlkns +.Op Fl D Ar debugmode +.Op Fl I Ns Ar initid +.Op Fl S Ar tos +.Op Fl X Ar authtype +.Op Fl a Ar authmode +.Op Fl edebug +.Op Fl r Ns Ar lowpty-highpty +.Op Fl u Ar len +.Op Fl debug Op Ar port +.Sh DESCRIPTION +The +.Nm telnetd +command is a server which supports the +.Tn DARPA +standard +.Tn TELNET +virtual terminal protocol. +.Nm Telnetd +is normally invoked by the internet server (see +.Xr inetd 8 ) +for requests to connect to the +.Tn TELNET +port as indicated by the +.Pa /etc/services +file (see +.Xr services 5 ) . +The +.Fl debug +option may be used to start up +.Nm telnetd +manually, instead of through +.Xr inetd 8 . +If started up this way, +.Ar port +may be specified to run +.Nm telnetd +on an alternate +.Tn TCP +port number. +.Pp +The +.Nm telnetd +command accepts the following options: +.Bl -tag -width "-a authmode" +.It Fl a Ar authmode +This option may be used for specifying what mode should +be used for authentication. +Note that this option is only useful if +.Nm telnetd +has been compiled with support for the +.Dv AUTHENTICATION +option. +There are several valid values for +.Ar authmode: +.Bl -tag -width debug +.It debug +Turns on authentication debugging code. +.It user +Only allow connections when the remote user +can provide valid authentication information +to identify the remote user, +and is allowed access to the specified account +without providing a password. +.It valid +Only allow connections when the remote user +can provide valid authentication information +to identify the remote user. +The +.Xr login 1 +command will provide any additional user verification +needed if the remote user is not allowed automatic +access to the specified account. +.It other +Only allow connections that supply some authentication information. +This option is currently not supported +by any of the existing authentication mechanisms, +and is thus the same as specifying +.Fl a +.Cm valid . +.It none +This is the default state. +Authentication information is not required. +If no or insufficient authentication information +is provided, then the +.Xr login 1 +program will provide the necessary user +verification. +.It off +This disables the authentication code. +All user verification will happen through the +.Xr login 1 +program. +.El +.It Fl B +Specifies bftp server mode. In this mode, +.Nm telnetd +causes login to start a +.Xr bftp 1 +session rather than the user's +normal shell. In bftp daemon mode normal +logins are not supported, and it must be used +on a port other than the normal +.Tn TELNET +port. +.It Fl D Ar debugmode +This option may be used for debugging purposes. +This allows +.Nm telnetd +to print out debugging information +to the connection, allowing the user to see what +.Nm telnetd +is doing. +There are several possible values for +.Ar debugmode: +.Bl -tag -width exercise +.It Cm options +Prints information about the negotiation of +.Tn TELNET +options. +.It Cm report +Prints the +.Cm options +information, plus some additional information +about what processing is going on. +.It Cm netdata +Displays the data stream received by +.Nm telnetd. +.It Cm ptydata +Displays data written to the pty. +.It Cm exercise +Has not been implemented yet. +.El +.It Fl debug +Enables debugging on each socket created by +.Nm telnetd +(see +.Dv SO_DEBUG +in +.Xr socket 2 ) . +.It Fl edebug +If +.Nm telnetd +has been compiled with support for data encryption, then the +.Fl edebug +option may be used to enable encryption debugging code. +.It Fl h +Disables the printing of host-specific information before +login has been completed. +.It Fl I Ar initid +This option is only applicable to +.Tn UNICOS +systems prior to 7.0. +It specifies the +.Dv ID +from +.Pa /etc/inittab +to use when init starts login sessions. The default +.Dv ID +is +.Dv fe. +.It Fl k +This option is only useful if +.Nm telnetd +has been compiled with both linemode and kludge linemode +support. If the +.Fl k +option is specified, then if the remote client does not +support the +.Dv LINEMODE +option, then +.Nm telnetd +will operate in character at a time mode. +It will still support kludge linemode, but will only +go into kludge linemode if the remote client requests +it. +(This is done by by the client sending +.Dv DONT SUPPRESS-GO-AHEAD +and +.Dv DONT ECHO . ) +The +.Fl k +option is most useful when there are remote clients +that do not support kludge linemode, but pass the heuristic +(if they respond with +.Dv WILL TIMING-MARK +in response to a +.Dv DO TIMING-MARK) +for kludge linemode support. +.It Fl l +Specifies line mode. Tries to force clients to use line- +at-a-time mode. +If the +.Dv LINEMODE +option is not supported, it will go +into kludge linemode. +.It Fl n +Disable +.Dv TCP +keep-alives. Normally +.Nm telnetd +enables the +.Tn TCP +keep-alive mechanism to probe connections that +have been idle for some period of time to determine +if the client is still there, so that idle connections +from machines that have crashed or can no longer +be reached may be cleaned up. +.It Fl r Ar lowpty-highpty +This option is only enabled when +.Nm telnetd +is compiled for +.Dv UNICOS. +It specifies an inclusive range of pseudo-terminal devices to +use. If the system has sysconf variable +.Dv _SC_CRAY_NPTY +configured, the default pty search range is 0 to +.Dv _SC_CRAY_NPTY; +otherwise, the default range is 0 to 128. Either +.Ar lowpty +or +.Ar highpty +may be omitted to allow changing +either end of the search range. If +.Ar lowpty +is omitted, the - character is still required so that +.Nm telnetd +can differentiate +.Ar highpty +from +.Ar lowpty . +.It Fl s +This option is only enabled if +.Nm telnetd +is compiled with support for +.Tn SecurID +cards. +It causes the +.Fl s +option to be passed on to +.Xr login 1 , +and thus is only useful if +.Xr login 1 +supports the +.Fl s +flag to indicate that only +.Tn SecurID +validated logins are allowed, and is +usually useful for controlling remote logins +from outside of a firewall. +.It Fl S Ar tos +.It Fl u Ar len +This option is used to specify the size of the field +in the +.Dv utmp +structure that holds the remote host name. +If the resolved host name is longer than +.Ar len , +the dotted decimal value will be used instead. +This allows hosts with very long host names that +overflow this field to still be uniquely identified. +Specifying +.Fl u0 +indicates that only dotted decimal addresses +should be put into the +.Pa utmp +file. +.ne 1i +.It Fl U +This option causes +.Nm telnetd +to refuse connections from addresses that +cannot be mapped back into a symbolic name +via the +.Xr gethostbyaddr 3 +routine. +.It Fl X Ar authtype +This option is only valid if +.Nm telnetd +has been built with support for the authentication option. +It disables the use of +.Ar authtype +authentication, and +can be used to temporarily disable +a specific authentication type without having to recompile +.Nm telnetd . +.El +.Pp +.Nm Telnetd +operates by allocating a pseudo-terminal device (see +.Xr pty 4 ) +for a client, then creating a login process which has +the slave side of the pseudo-terminal as +.Dv stdin , +.Dv stdout +and +.Dv stderr . +.Nm Telnetd +manipulates the master side of the pseudo-terminal, +implementing the +.Tn TELNET +protocol and passing characters +between the remote client and the login process. +.Pp +When a +.Tn TELNET +session is started up, +.Nm telnetd +sends +.Tn TELNET +options to the client side indicating +a willingness to do the +following +.Tn TELNET +options, which are described in more detail below: +.Bd -literal -offset indent +DO AUTHENTICATION +WILL ENCRYPT +DO TERMINAL TYPE +DO TSPEED +DO XDISPLOC +DO NEW-ENVIRON +DO ENVIRON +WILL SUPPRESS GO AHEAD +DO ECHO +DO LINEMODE +DO NAWS +WILL STATUS +DO LFLOW +DO TIMING-MARK +.Ed +.Pp +The pseudo-terminal allocated to the client is configured +to operate in \*(lqcooked\*(rq mode, and with +.Dv XTABS and +.Dv CRMOD +enabled (see +.Xr tty 4 ) . +.Pp +.Nm Telnetd +has support for enabling locally the following +.Tn TELNET +options: +.Bl -tag -width "DO AUTHENTICATION" +.It "WILL ECHO" +When the +.Dv LINEMODE +option is enabled, a +.Dv WILL ECHO +or +.Dv WONT ECHO +will be sent to the client to indicate the +current state of terminal echoing. +When terminal echo is not desired, a +.Dv WILL ECHO +is sent to indicate that +.Tn telnetd +will take care of echoing any data that needs to be +echoed to the terminal, and then nothing is echoed. +When terminal echo is desired, a +.Dv WONT ECHO +is sent to indicate that +.Tn telnetd +will not be doing any terminal echoing, so the +client should do any terminal echoing that is needed. +.It "WILL BINARY" +Indicates that the client is willing to send a +8 bits of data, rather than the normal 7 bits +of the Network Virtual Terminal. +.It "WILL SGA" +Indicates that it will not be sending +.Dv IAC GA, +go ahead, commands. +.It "WILL STATUS" +Indicates a willingness to send the client, upon +request, of the current status of all +.Tn TELNET +options. +.It "WILL TIMING-MARK" +Whenever a +.Dv DO TIMING-MARK +command is received, it is always responded +to with a +.Dv WILL TIMING-MARK +.ne 1i +.It "WILL LOGOUT" +When a +.Dv DO LOGOUT +is received, a +.Dv WILL LOGOUT +is sent in response, and the +.Tn TELNET +session is shut down. +.It "WILL ENCRYPT" +Only sent if +.Nm telnetd +is compiled with support for data encryption, and +indicates a willingness to decrypt +the data stream. +.El +.Pp +.Nm Telnetd +has support for enabling remotely the following +.Tn TELNET +options: +.Bl -tag -width "DO AUTHENTICATION" +.It "DO BINARY" +Sent to indicate that +.Tn telnetd +is willing to receive an 8 bit data stream. +.It "DO LFLOW" +Requests that the client handle flow control +characters remotely. +.It "DO ECHO" +This is not really supported, but is sent to identify a 4.2BSD +.Xr telnet 1 +client, which will improperly respond with +.Dv WILL ECHO. +If a +.Dv WILL ECHO +is received, a +.Dv DONT ECHO +will be sent in response. +.It "DO TERMINAL-TYPE" +Indicates a desire to be able to request the +name of the type of terminal that is attached +to the client side of the connection. +.It "DO SGA" +Indicates that it does not need to receive +.Dv IAC GA, +the go ahead command. +.It "DO NAWS" +Requests that the client inform the server when +the window (display) size changes. +.It "DO TERMINAL-SPEED" +Indicates a desire to be able to request information +about the speed of the serial line to which +the client is attached. +.It "DO XDISPLOC" +Indicates a desire to be able to request the name +of the X windows display that is associated with +the telnet client. +.It "DO NEW-ENVIRON" +Indicates a desire to be able to request environment +variable information, as described in RFC 1572. +.It "DO ENVIRON" +Indicates a desire to be able to request environment +variable information, as described in RFC 1408. +.It "DO LINEMODE" +Only sent if +.Nm telnetd +is compiled with support for linemode, and +requests that the client do line by line processing. +.It "DO TIMING-MARK" +Only sent if +.Nm telnetd +is compiled with support for both linemode and +kludge linemode, and the client responded with +.Dv WONT LINEMODE. +If the client responds with +.Dv WILL TM, +the it is assumed that the client supports +kludge linemode. +Note that the +.Op Fl k +option can be used to disable this. +.It "DO AUTHENTICATION" +Only sent if +.Nm telnetd +is compiled with support for authentication, and +indicates a willingness to receive authentication +information for automatic login. +.It "DO ENCRYPT" +Only sent if +.Nm telnetd +is compiled with support for data encryption, and +indicates a willingness to decrypt +the data stream. +.Sh ENVIRONMENT +.Sh FILES +.Pa /etc/services +.br +.Pa /etc/inittab +(UNICOS systems only) +.br +.Pa /etc/iptos +(if supported) +.br +.Pa /usr/ucb/bftp +(if supported) +.Sh "SEE ALSO" +.Xr telnet 1 , +.Xr login 1 , +.Xr bftp 1 +(if supported) +.Sh STANDARDS +.Bl -tag -compact -width RFC-1572 +.It Cm RFC-854 +.Tn TELNET +PROTOCOL SPECIFICATION +.It Cm RFC-855 +TELNET OPTION SPECIFICATIONS +.It Cm RFC-856 +TELNET BINARY TRANSMISSION +.It Cm RFC-857 +TELNET ECHO OPTION +.It Cm RFC-858 +TELNET SUPPRESS GO AHEAD OPTION +.It Cm RFC-859 +TELNET STATUS OPTION +.It Cm RFC-860 +TELNET TIMING MARK OPTION +.It Cm RFC-861 +TELNET EXTENDED OPTIONS - LIST OPTION +.It Cm RFC-885 +TELNET END OF RECORD OPTION +.It Cm RFC-1073 +Telnet Window Size Option +.It Cm RFC-1079 +Telnet Terminal Speed Option +.It Cm RFC-1091 +Telnet Terminal-Type Option +.It Cm RFC-1096 +Telnet X Display Location Option +.It Cm RFC-1123 +Requirements for Internet Hosts -- Application and Support +.It Cm RFC-1184 +Telnet Linemode Option +.It Cm RFC-1372 +Telnet Remote Flow Control Option +.It Cm RFC-1416 +Telnet Authentication Option +.It Cm RFC-1411 +Telnet Authentication: Kerberos Version 4 +.It Cm RFC-1412 +Telnet Authentication: SPX +.It Cm RFC-1571 +Telnet Environment Option Interoperability Issues +.It Cm RFC-1572 +Telnet Environment Option +.Sh BUGS +Some +.Tn TELNET +commands are only partially implemented. +.Pp +Because of bugs in the original 4.2 BSD +.Xr telnet 1 , +.Nm telnetd +performs some dubious protocol exchanges to try to discover if the remote +client is, in fact, a 4.2 BSD +.Xr telnet 1 . +.Pp +Binary mode +has no common interpretation except between similar operating systems +(Unix in this case). +.Pp +The terminal type name received from the remote client is converted to +lower case. +.Pp +.Nm Telnetd +never sends +.Tn TELNET +.Dv IAC GA +(go ahead) commands. diff --git a/telnetd/telnetd.c b/telnetd/telnetd.c new file mode 100644 index 0000000..70c0fc0 --- /dev/null +++ b/telnetd/telnetd.c @@ -0,0 +1,1608 @@ +/* + * Copyright (c) 1989, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char copyright[] = +"@(#) Copyright (c) 1989, 1993\n\ + The Regents of the University of California. All rights reserved.\n"; +#endif /* not lint */ + +#ifndef lint +static char sccsid[] = "@(#)telnetd.c 8.4 (Berkeley) 5/30/95"; +#endif /* not lint */ + +#include "telnetd.h" +#include "pathnames.h" + +#if defined(_SC_CRAY_SECURE_SYS) && !defined(SCM_SECURITY) +/* + * UNICOS 6.0/6.1 do not have SCM_SECURITY defined, so we can + * use it to tell us to turn off all the socket security code, + * since that is only used in UNICOS 7.0 and later. + */ +# undef _SC_CRAY_SECURE_SYS +#endif + +#if defined(_SC_CRAY_SECURE_SYS) +#include +#include +# ifdef SO_SEC_MULTI /* 8.0 code */ +#include +#include +# endif /* SO_SEC_MULTI */ +int secflag; +char tty_dev[16]; +struct secdev dv; +struct sysv sysv; +# ifdef SO_SEC_MULTI /* 8.0 code */ +struct socksec ss; +# else /* SO_SEC_MULTI */ /* 7.0 code */ +struct socket_security ss; +# endif /* SO_SEC_MULTI */ +#endif /* _SC_CRAY_SECURE_SYS */ + +#if defined(AUTHENTICATION) +#include +int auth_level = 0; +#endif +#if defined(SecurID) +int require_SecurID = 0; +#endif + +extern int utmp_len; +int registerd_host_only = 0; + +#ifdef STREAMSPTY +# include +# include +/* make sure we don't get the bsd version */ +# include "/usr/include/sys/tty.h" +# include + +/* + * Because of the way ptyibuf is used with streams messages, we need + * ptyibuf+1 to be on a full-word boundary. The following wierdness + * is simply to make that happen. + */ +long ptyibufbuf[BUFSIZ/sizeof(long)+1]; +char *ptyibuf = ((char *)&ptyibufbuf[1])-1; +char *ptyip = ((char *)&ptyibufbuf[1])-1; +char ptyibuf2[BUFSIZ]; +unsigned char ctlbuf[BUFSIZ]; +struct strbuf strbufc, strbufd; + +int readstream(); + +#else /* ! STREAMPTY */ + +/* + * I/O data buffers, + * pointers, and counters. + */ +char ptyibuf[BUFSIZ], *ptyip = ptyibuf; +char ptyibuf2[BUFSIZ]; + +#endif /* ! STREAMPTY */ + +int hostinfo = 1; /* do we print login banner? */ + +#ifdef CRAY +extern int newmap; /* nonzero if \n maps to ^M^J */ +int lowpty = 0, highpty; /* low, high pty numbers */ +#endif /* CRAY */ + +int debug = 0; +int keepalive = 1; +char *progname; + +extern void usage P((void)); + +/* + * The string to pass to getopt(). We do it this way so + * that only the actual options that we support will be + * passed off to getopt(). + */ +char valid_opts[] = { + 'd', ':', 'h', 'k', 'n', 'S', ':', 'u', ':', 'U', +#ifdef AUTHENTICATION + 'a', ':', 'X', ':', +#endif +#ifdef BFTPDAEMON + 'B', +#endif +#ifdef DIAGNOSTICS + 'D', ':', +#endif +#ifdef ENCRYPTION + 'e', ':', +#endif +#if defined(CRAY) && defined(NEWINIT) + 'I', ':', +#endif +#ifdef LINEMODE + 'l', +#endif +#ifdef CRAY + 'r', ':', +#endif +#ifdef SecurID + 's', +#endif + '\0' +}; + +main(argc, argv) + char *argv[]; +{ + struct sockaddr_in from; + int on = 1, fromlen; + register int ch; + extern char *optarg; + extern int optind; +#if defined(IPPROTO_IP) && defined(IP_TOS) + int tos = -1; +#endif + + pfrontp = pbackp = ptyobuf; + netip = netibuf; + nfrontp = nbackp = netobuf; +#ifdef ENCRYPTION + nclearto = 0; +#endif /* ENCRYPTION */ + + progname = *argv; + +#ifdef CRAY + /* + * Get number of pty's before trying to process options, + * which may include changing pty range. + */ + highpty = getnpty(); +#endif /* CRAY */ + + while ((ch = getopt(argc, argv, valid_opts)) != EOF) { + switch(ch) { + +#ifdef AUTHENTICATION + case 'a': + /* + * Check for required authentication level + */ + if (strcmp(optarg, "debug") == 0) { + extern int auth_debug_mode; + auth_debug_mode = 1; + } else if (strcasecmp(optarg, "none") == 0) { + auth_level = 0; + } else if (strcasecmp(optarg, "other") == 0) { + auth_level = AUTH_OTHER; + } else if (strcasecmp(optarg, "user") == 0) { + auth_level = AUTH_USER; + } else if (strcasecmp(optarg, "valid") == 0) { + auth_level = AUTH_VALID; + } else if (strcasecmp(optarg, "off") == 0) { + /* + * This hack turns off authentication + */ + auth_level = -1; + } else { + fprintf(stderr, + "telnetd: unknown authorization level for -a\n"); + } + break; +#endif /* AUTHENTICATION */ + +#ifdef BFTPDAEMON + case 'B': + bftpd++; + break; +#endif /* BFTPDAEMON */ + + case 'd': + if (strcmp(optarg, "ebug") == 0) { + debug++; + break; + } + usage(); + /* NOTREACHED */ + break; + +#ifdef DIAGNOSTICS + case 'D': + /* + * Check for desired diagnostics capabilities. + */ + if (!strcmp(optarg, "report")) { + diagnostic |= TD_REPORT|TD_OPTIONS; + } else if (!strcmp(optarg, "exercise")) { + diagnostic |= TD_EXERCISE; + } else if (!strcmp(optarg, "netdata")) { + diagnostic |= TD_NETDATA; + } else if (!strcmp(optarg, "ptydata")) { + diagnostic |= TD_PTYDATA; + } else if (!strcmp(optarg, "options")) { + diagnostic |= TD_OPTIONS; + } else { + usage(); + /* NOT REACHED */ + } + break; +#endif /* DIAGNOSTICS */ + +#ifdef ENCRYPTION + case 'e': + if (strcmp(optarg, "debug") == 0) { + extern int encrypt_debug_mode; + encrypt_debug_mode = 1; + break; + } + usage(); + /* NOTREACHED */ + break; +#endif /* ENCRYPTION */ + + case 'h': + hostinfo = 0; + break; + +#if defined(CRAY) && defined(NEWINIT) + case 'I': + { + extern char *gen_id; + gen_id = optarg; + break; + } +#endif /* defined(CRAY) && defined(NEWINIT) */ + +#ifdef LINEMODE + case 'l': + alwayslinemode = 1; + break; +#endif /* LINEMODE */ + + case 'k': +#if defined(LINEMODE) && defined(KLUDGELINEMODE) + lmodetype = NO_AUTOKLUDGE; +#else + /* ignore -k option if built without kludge linemode */ +#endif /* defined(LINEMODE) && defined(KLUDGELINEMODE) */ + break; + + case 'n': + keepalive = 0; + break; + +#ifdef CRAY + case 'r': + { + char *strchr(); + char *c; + + /* + * Allow the specification of alterations + * to the pty search range. It is legal to + * specify only one, and not change the + * other from its default. + */ + c = strchr(optarg, '-'); + if (c) { + *c++ = '\0'; + highpty = atoi(c); + } + if (*optarg != '\0') + lowpty = atoi(optarg); + if ((lowpty > highpty) || (lowpty < 0) || + (highpty > 32767)) { + usage(); + /* NOT REACHED */ + } + break; + } +#endif /* CRAY */ + +#ifdef SecurID + case 's': + /* SecurID required */ + require_SecurID = 1; + break; +#endif /* SecurID */ + case 'S': +#ifdef HAS_GETTOS + if ((tos = parsetos(optarg, "tcp")) < 0) + fprintf(stderr, "%s%s%s\n", + "telnetd: Bad TOS argument '", optarg, + "'; will try to use default TOS"); +#else + fprintf(stderr, "%s%s\n", "TOS option unavailable; ", + "-S flag not supported\n"); +#endif + break; + + case 'u': + utmp_len = atoi(optarg); + break; + + case 'U': + registerd_host_only = 1; + break; + +#ifdef AUTHENTICATION + case 'X': + /* + * Check for invalid authentication types + */ + auth_disable_name(optarg); + break; +#endif /* AUTHENTICATION */ + + default: + fprintf(stderr, "telnetd: %c: unknown option\n", ch); + /* FALLTHROUGH */ + case '?': + usage(); + /* NOTREACHED */ + } + } + + argc -= optind; + argv += optind; + + if (debug) { + int s, ns, foo; + struct servent *sp; + static struct sockaddr_in sin = { AF_INET }; + + if (argc > 1) { + usage(); + /* NOT REACHED */ + } else if (argc == 1) { + if (sp = getservbyname(*argv, "tcp")) { + sin.sin_port = sp->s_port; + } else { + sin.sin_port = atoi(*argv); + if ((int)sin.sin_port <= 0) { + fprintf(stderr, "telnetd: %s: bad port #\n", *argv); + usage(); + /* NOT REACHED */ + } + sin.sin_port = htons((u_short)sin.sin_port); + } + } else { + sp = getservbyname("telnet", "tcp"); + if (sp == 0) { + fprintf(stderr, "telnetd: tcp/telnet: unknown service\n"); + exit(1); + } + sin.sin_port = sp->s_port; + } + + s = socket(AF_INET, SOCK_STREAM, 0); + if (s < 0) { + perror("telnetd: socket");; + exit(1); + } + (void) setsockopt(s, SOL_SOCKET, SO_REUSEADDR, + (char *)&on, sizeof(on)); + if (bind(s, (struct sockaddr *)&sin, sizeof sin) < 0) { + perror("bind"); + exit(1); + } + if (listen(s, 1) < 0) { + perror("listen"); + exit(1); + } + foo = sizeof sin; + ns = accept(s, (struct sockaddr *)&sin, &foo); + if (ns < 0) { + perror("accept"); + exit(1); + } + (void) dup2(ns, 0); + (void) close(ns); + (void) close(s); +#ifdef convex + } else if (argc == 1) { + ; /* VOID*/ /* Just ignore the host/port name */ +#endif + } else if (argc > 0) { + usage(); + /* NOT REACHED */ + } + +#if defined(_SC_CRAY_SECURE_SYS) + secflag = sysconf(_SC_CRAY_SECURE_SYS); + + /* + * Get socket's security label + */ + if (secflag) { + int szss = sizeof(ss); +#ifdef SO_SEC_MULTI /* 8.0 code */ + int sock_multi; + int szi = sizeof(int); +#endif /* SO_SEC_MULTI */ + + memset((char *)&dv, 0, sizeof(dv)); + + if (getsysv(&sysv, sizeof(struct sysv)) != 0) { + perror("getsysv"); + exit(1); + } + + /* + * Get socket security label and set device values + * {security label to be set on ttyp device} + */ +#ifdef SO_SEC_MULTI /* 8.0 code */ + if ((getsockopt(0, SOL_SOCKET, SO_SECURITY, + (char *)&ss, &szss) < 0) || + (getsockopt(0, SOL_SOCKET, SO_SEC_MULTI, + (char *)&sock_multi, &szi) < 0)) { + perror("getsockopt"); + exit(1); + } else { + dv.dv_actlvl = ss.ss_actlabel.lt_level; + dv.dv_actcmp = ss.ss_actlabel.lt_compart; + if (!sock_multi) { + dv.dv_minlvl = dv.dv_maxlvl = dv.dv_actlvl; + dv.dv_valcmp = dv.dv_actcmp; + } else { + dv.dv_minlvl = ss.ss_minlabel.lt_level; + dv.dv_maxlvl = ss.ss_maxlabel.lt_level; + dv.dv_valcmp = ss.ss_maxlabel.lt_compart; + } + dv.dv_devflg = 0; + } +#else /* SO_SEC_MULTI */ /* 7.0 code */ + if (getsockopt(0, SOL_SOCKET, SO_SECURITY, + (char *)&ss, &szss) >= 0) { + dv.dv_actlvl = ss.ss_slevel; + dv.dv_actcmp = ss.ss_compart; + dv.dv_minlvl = ss.ss_minlvl; + dv.dv_maxlvl = ss.ss_maxlvl; + dv.dv_valcmp = ss.ss_maxcmp; + } +#endif /* SO_SEC_MULTI */ + } +#endif /* _SC_CRAY_SECURE_SYS */ + + openlog("telnetd", LOG_PID | LOG_ODELAY, LOG_DAEMON); + fromlen = sizeof (from); + if (getpeername(0, (struct sockaddr *)&from, &fromlen) < 0) { + fprintf(stderr, "%s: ", progname); + perror("getpeername"); + _exit(1); + } + if (keepalive && + setsockopt(0, SOL_SOCKET, SO_KEEPALIVE, + (char *)&on, sizeof (on)) < 0) { + syslog(LOG_WARNING, "setsockopt (SO_KEEPALIVE): %m"); + } + +#if defined(IPPROTO_IP) && defined(IP_TOS) + { +# if defined(HAS_GETTOS) + struct tosent *tp; + if (tos < 0 && (tp = gettosbyname("telnet", "tcp"))) + tos = tp->t_tos; +# endif + if (tos < 0) + tos = 020; /* Low Delay bit */ + if (tos + && (setsockopt(0, IPPROTO_IP, IP_TOS, + (char *)&tos, sizeof(tos)) < 0) + && (errno != ENOPROTOOPT) ) + syslog(LOG_WARNING, "setsockopt (IP_TOS): %m"); + } +#endif /* defined(IPPROTO_IP) && defined(IP_TOS) */ + net = 0; + doit(&from); + /* NOTREACHED */ +} /* end of main */ + + void +usage() +{ + fprintf(stderr, "Usage: telnetd"); +#ifdef AUTHENTICATION + fprintf(stderr, " [-a (debug|other|user|valid|off|none)]\n\t"); +#endif +#ifdef BFTPDAEMON + fprintf(stderr, " [-B]"); +#endif + fprintf(stderr, " [-debug]"); +#ifdef DIAGNOSTICS + fprintf(stderr, " [-D (options|report|exercise|netdata|ptydata)]\n\t"); +#endif +#ifdef AUTHENTICATION + fprintf(stderr, " [-edebug]"); +#endif + fprintf(stderr, " [-h]"); +#if defined(CRAY) && defined(NEWINIT) + fprintf(stderr, " [-Iinitid]"); +#endif +#if defined(LINEMODE) && defined(KLUDGELINEMODE) + fprintf(stderr, " [-k]"); +#endif +#ifdef LINEMODE + fprintf(stderr, " [-l]"); +#endif + fprintf(stderr, " [-n]"); +#ifdef CRAY + fprintf(stderr, " [-r[lowpty]-[highpty]]"); +#endif + fprintf(stderr, "\n\t"); +#ifdef SecurID + fprintf(stderr, " [-s]"); +#endif +#ifdef HAS_GETTOS + fprintf(stderr, " [-S tos]"); +#endif +#ifdef AUTHENTICATION + fprintf(stderr, " [-X auth-type]"); +#endif + fprintf(stderr, " [-u utmp_hostname_length] [-U]"); + fprintf(stderr, " [port]\n"); + exit(1); +} + +/* + * getterminaltype + * + * Ask the other end to send along its terminal type and speed. + * Output is the variable terminaltype filled in. + */ +static unsigned char ttytype_sbbuf[] = { + IAC, SB, TELOPT_TTYPE, TELQUAL_SEND, IAC, SE +}; + + int +getterminaltype(name) + char *name; +{ + int retval = -1; + void _gettermname(); + + settimer(baseline); +#if defined(AUTHENTICATION) + /* + * Handle the Authentication option before we do anything else. + */ + send_do(TELOPT_AUTHENTICATION, 1); + while (his_will_wont_is_changing(TELOPT_AUTHENTICATION)) + ttloop(); + if (his_state_is_will(TELOPT_AUTHENTICATION)) { + retval = auth_wait(name); + } +#endif + +#ifdef ENCRYPTION + send_will(TELOPT_ENCRYPT, 1); +#endif /* ENCRYPTION */ + send_do(TELOPT_TTYPE, 1); + send_do(TELOPT_TSPEED, 1); + send_do(TELOPT_XDISPLOC, 1); + send_do(TELOPT_NEW_ENVIRON, 1); + send_do(TELOPT_OLD_ENVIRON, 1); + while ( +#ifdef ENCRYPTION + his_do_dont_is_changing(TELOPT_ENCRYPT) || +#endif /* ENCRYPTION */ + his_will_wont_is_changing(TELOPT_TTYPE) || + his_will_wont_is_changing(TELOPT_TSPEED) || + his_will_wont_is_changing(TELOPT_XDISPLOC) || + his_will_wont_is_changing(TELOPT_NEW_ENVIRON) || + his_will_wont_is_changing(TELOPT_OLD_ENVIRON)) { + ttloop(); + } +#ifdef ENCRYPTION + /* + * Wait for the negotiation of what type of encryption we can + * send with. If autoencrypt is not set, this will just return. + */ + if (his_state_is_will(TELOPT_ENCRYPT)) { + encrypt_wait(); + } +#endif /* ENCRYPTION */ + if (his_state_is_will(TELOPT_TSPEED)) { + static unsigned char sb[] = + { IAC, SB, TELOPT_TSPEED, TELQUAL_SEND, IAC, SE }; + + memmove(nfrontp, sb, sizeof sb); + nfrontp += sizeof sb; + DIAG(TD_OPTIONS, printsub('>', sb + 2, sizeof sb - 2);); + } + if (his_state_is_will(TELOPT_XDISPLOC)) { + static unsigned char sb[] = + { IAC, SB, TELOPT_XDISPLOC, TELQUAL_SEND, IAC, SE }; + + memmove(nfrontp, sb, sizeof sb); + nfrontp += sizeof sb; + DIAG(TD_OPTIONS, printsub('>', sb + 2, sizeof sb - 2);); + } + if (his_state_is_will(TELOPT_NEW_ENVIRON)) { + static unsigned char sb[] = + { IAC, SB, TELOPT_NEW_ENVIRON, TELQUAL_SEND, IAC, SE }; + + memmove(nfrontp, sb, sizeof sb); + nfrontp += sizeof sb; + DIAG(TD_OPTIONS, printsub('>', sb + 2, sizeof sb - 2);); + } + else if (his_state_is_will(TELOPT_OLD_ENVIRON)) { + static unsigned char sb[] = + { IAC, SB, TELOPT_OLD_ENVIRON, TELQUAL_SEND, IAC, SE }; + + memmove(nfrontp, sb, sizeof sb); + nfrontp += sizeof sb; + DIAG(TD_OPTIONS, printsub('>', sb + 2, sizeof sb - 2);); + } + if (his_state_is_will(TELOPT_TTYPE)) { + + memmove(nfrontp, ttytype_sbbuf, sizeof ttytype_sbbuf); + nfrontp += sizeof ttytype_sbbuf; + DIAG(TD_OPTIONS, printsub('>', ttytype_sbbuf + 2, + sizeof ttytype_sbbuf - 2);); + } + if (his_state_is_will(TELOPT_TSPEED)) { + while (sequenceIs(tspeedsubopt, baseline)) + ttloop(); + } + if (his_state_is_will(TELOPT_XDISPLOC)) { + while (sequenceIs(xdisplocsubopt, baseline)) + ttloop(); + } + if (his_state_is_will(TELOPT_NEW_ENVIRON)) { + while (sequenceIs(environsubopt, baseline)) + ttloop(); + } + if (his_state_is_will(TELOPT_OLD_ENVIRON)) { + while (sequenceIs(oenvironsubopt, baseline)) + ttloop(); + } + if (his_state_is_will(TELOPT_TTYPE)) { + char first[256], last[256]; + + while (sequenceIs(ttypesubopt, baseline)) + ttloop(); + + /* + * If the other side has already disabled the option, then + * we have to just go with what we (might) have already gotten. + */ + if (his_state_is_will(TELOPT_TTYPE) && !terminaltypeok(terminaltype)) { + (void) strncpy(first, terminaltype, sizeof(first)); + for(;;) { + /* + * Save the unknown name, and request the next name. + */ + (void) strncpy(last, terminaltype, sizeof(last)); + _gettermname(); + if (terminaltypeok(terminaltype)) + break; + if ((strncmp(last, terminaltype, sizeof(last)) == 0) || + his_state_is_wont(TELOPT_TTYPE)) { + /* + * We've hit the end. If this is the same as + * the first name, just go with it. + */ + if (strncmp(first, terminaltype, sizeof(first)) == 0) + break; + /* + * Get the terminal name one more time, so that + * RFC1091 compliant telnets will cycle back to + * the start of the list. + */ + _gettermname(); + if (strncmp(first, terminaltype, sizeof(first)) != 0) + (void) strncpy(terminaltype, first, sizeof(first)); + break; + } + } + } + } + return(retval); +} /* end of getterminaltype */ + + void +_gettermname() +{ + /* + * If the client turned off the option, + * we can't send another request, so we + * just return. + */ + if (his_state_is_wont(TELOPT_TTYPE)) + return; + settimer(baseline); + memmove(nfrontp, ttytype_sbbuf, sizeof ttytype_sbbuf); + nfrontp += sizeof ttytype_sbbuf; + DIAG(TD_OPTIONS, printsub('>', ttytype_sbbuf + 2, + sizeof ttytype_sbbuf - 2);); + while (sequenceIs(ttypesubopt, baseline)) + ttloop(); +} + + int +terminaltypeok(s) + char *s; +{ + char buf[1024]; + + if (terminaltype == NULL) + return(1); + + /* + * tgetent() will return 1 if the type is known, and + * 0 if it is not known. If it returns -1, it couldn't + * open the database. But if we can't open the database, + * it won't help to say we failed, because we won't be + * able to verify anything else. So, we treat -1 like 1. + */ + if (tgetent(buf, s) == 0) + return(0); + return(1); +} + +#ifndef MAXHOSTNAMELEN +#define MAXHOSTNAMELEN 64 +#endif /* MAXHOSTNAMELEN */ + +char *hostname; +char host_name[MAXHOSTNAMELEN]; +char remote_host_name[MAXHOSTNAMELEN]; + +#ifndef convex +extern void telnet P((int, int)); +#else +extern void telnet P((int, int, char *)); +#endif + +/* + * Get a pty, scan input lines. + */ +doit(who) + struct sockaddr_in *who; +{ + char *host, *inet_ntoa(); + int t; + struct hostent *hp; + int level; + int ptynum; + char user_name[256]; + + /* + * Find an available pty to use. + */ +#ifndef convex + pty = getpty(&ptynum); + if (pty < 0) + fatal(net, "All network ports in use"); +#else + for (;;) { + char *lp; + extern char *line, *getpty(); + + if ((lp = getpty()) == NULL) + fatal(net, "Out of ptys"); + + if ((pty = open(lp, 2)) >= 0) { + strcpy(line,lp); + line[5] = 't'; + break; + } + } +#endif + +#if defined(_SC_CRAY_SECURE_SYS) + /* + * set ttyp line security label + */ + if (secflag) { + char slave_dev[16]; + + sprintf(tty_dev, "/dev/pty/%03d", ptynum); + if (setdevs(tty_dev, &dv) < 0) + fatal(net, "cannot set pty security"); + sprintf(slave_dev, "/dev/ttyp%03d", ptynum); + if (setdevs(slave_dev, &dv) < 0) + fatal(net, "cannot set tty security"); + } +#endif /* _SC_CRAY_SECURE_SYS */ + + /* get name of connected client */ + hp = gethostbyaddr((char *)&who->sin_addr, sizeof (struct in_addr), + who->sin_family); + + if (hp == NULL && registerd_host_only) { + fatal(net, "Couldn't resolve your address into a host name.\r\n\ + Please contact your net administrator"); + } else if (hp && + (strlen(hp->h_name) <= (unsigned int)((utmp_len < 0) ? -utmp_len + : utmp_len))) { + host = hp->h_name; + } else { + host = inet_ntoa(who->sin_addr); + } + /* + * We must make a copy because Kerberos is probably going + * to also do a gethost* and overwrite the static data... + */ + strncpy(remote_host_name, host, sizeof(remote_host_name)-1); + remote_host_name[sizeof(remote_host_name)-1] = 0; + host = remote_host_name; + + (void) gethostname(host_name, sizeof (host_name)); + hostname = host_name; + +#if defined(AUTHENTICATION) || defined(ENCRYPTION) + auth_encrypt_init(hostname, host, "TELNETD", 1); +#endif + + init_env(); + /* + * get terminal type. + */ + *user_name = 0; + level = getterminaltype(user_name); + setenv("TERM", terminaltype ? terminaltype : "network", 1); + + /* + * Start up the login process on the slave side of the terminal + */ +#ifndef convex + startslave(host, level, user_name); + +#if defined(_SC_CRAY_SECURE_SYS) + if (secflag) { + if (setulvl(dv.dv_actlvl) < 0) + fatal(net,"cannot setulvl()"); + if (setucmp(dv.dv_actcmp) < 0) + fatal(net, "cannot setucmp()"); + } +#endif /* _SC_CRAY_SECURE_SYS */ + + telnet(net, pty); /* begin server processing */ +#else + telnet(net, pty, host); +#endif + /*NOTREACHED*/ +} /* end of doit */ + +#if defined(CRAY2) && defined(UNICOS5) && defined(UNICOS50) + int +Xterm_output(ibufp, obuf, icountp, ocount) + char **ibufp, *obuf; + int *icountp, ocount; +{ + int ret; + ret = term_output(*ibufp, obuf, *icountp, ocount); + *ibufp += *icountp; + *icountp = 0; + return(ret); +} +#define term_output Xterm_output +#endif /* defined(CRAY2) && defined(UNICOS5) && defined(UNICOS50) */ + +/* + * Main loop. Select from pty and network, and + * hand data to telnet receiver finite state machine. + */ + void +#ifndef convex +telnet(f, p) +#else +telnet(f, p, host) +#endif + int f, p; +#ifdef convex + char *host; +#endif +{ + int on = 1; +#define TABBUFSIZ 512 + char defent[TABBUFSIZ]; + char defstrs[TABBUFSIZ]; +#undef TABBUFSIZ + char *HE; + char *HN; + char *IM; + void netflush(); + int nfd; + + /* + * Initialize the slc mapping table. + */ + get_slc_defaults(); + + /* + * Do some tests where it is desireable to wait for a response. + * Rather than doing them slowly, one at a time, do them all + * at once. + */ + if (my_state_is_wont(TELOPT_SGA)) + send_will(TELOPT_SGA, 1); + /* + * Is the client side a 4.2 (NOT 4.3) system? We need to know this + * because 4.2 clients are unable to deal with TCP urgent data. + * + * To find out, we send out a "DO ECHO". If the remote system + * answers "WILL ECHO" it is probably a 4.2 client, and we note + * that fact ("WILL ECHO" ==> that the client will echo what + * WE, the server, sends it; it does NOT mean that the client will + * echo the terminal input). + */ + send_do(TELOPT_ECHO, 1); + +#ifdef LINEMODE + if (his_state_is_wont(TELOPT_LINEMODE)) { + /* Query the peer for linemode support by trying to negotiate + * the linemode option. + */ + linemode = 0; + editmode = 0; + send_do(TELOPT_LINEMODE, 1); /* send do linemode */ + } +#endif /* LINEMODE */ + + /* + * Send along a couple of other options that we wish to negotiate. + */ + send_do(TELOPT_NAWS, 1); + send_will(TELOPT_STATUS, 1); + flowmode = 1; /* default flow control state */ + restartany = -1; /* uninitialized... */ + send_do(TELOPT_LFLOW, 1); + + /* + * Spin, waiting for a response from the DO ECHO. However, + * some REALLY DUMB telnets out there might not respond + * to the DO ECHO. So, we spin looking for NAWS, (most dumb + * telnets so far seem to respond with WONT for a DO that + * they don't understand...) because by the time we get the + * response, it will already have processed the DO ECHO. + * Kludge upon kludge. + */ + while (his_will_wont_is_changing(TELOPT_NAWS)) + ttloop(); + + /* + * But... + * The client might have sent a WILL NAWS as part of its + * startup code; if so, we'll be here before we get the + * response to the DO ECHO. We'll make the assumption + * that any implementation that understands about NAWS + * is a modern enough implementation that it will respond + * to our DO ECHO request; hence we'll do another spin + * waiting for the ECHO option to settle down, which is + * what we wanted to do in the first place... + */ + if (his_want_state_is_will(TELOPT_ECHO) && + his_state_is_will(TELOPT_NAWS)) { + while (his_will_wont_is_changing(TELOPT_ECHO)) + ttloop(); + } + /* + * On the off chance that the telnet client is broken and does not + * respond to the DO ECHO we sent, (after all, we did send the + * DO NAWS negotiation after the DO ECHO, and we won't get here + * until a response to the DO NAWS comes back) simulate the + * receipt of a will echo. This will also send a WONT ECHO + * to the client, since we assume that the client failed to + * respond because it believes that it is already in DO ECHO + * mode, which we do not want. + */ + if (his_want_state_is_will(TELOPT_ECHO)) { + DIAG(TD_OPTIONS, + {sprintf(nfrontp, "td: simulating recv\r\n"); + nfrontp += strlen(nfrontp);}); + willoption(TELOPT_ECHO); + } + + /* + * Finally, to clean things up, we turn on our echo. This + * will break stupid 4.2 telnets out of local terminal echo. + */ + + if (my_state_is_wont(TELOPT_ECHO)) + send_will(TELOPT_ECHO, 1); + +#ifndef STREAMSPTY + /* + * Turn on packet mode + */ + (void) ioctl(p, TIOCPKT, (char *)&on); +#endif + +#if defined(LINEMODE) && defined(KLUDGELINEMODE) + /* + * Continuing line mode support. If client does not support + * real linemode, attempt to negotiate kludge linemode by sending + * the do timing mark sequence. + */ + if (lmodetype < REAL_LINEMODE) + send_do(TELOPT_TM, 1); +#endif /* defined(LINEMODE) && defined(KLUDGELINEMODE) */ + + /* + * Call telrcv() once to pick up anything received during + * terminal type negotiation, 4.2/4.3 determination, and + * linemode negotiation. + */ + telrcv(); + + (void) ioctl(f, FIONBIO, (char *)&on); + (void) ioctl(p, FIONBIO, (char *)&on); +#if defined(CRAY2) && defined(UNICOS5) + init_termdriver(f, p, interrupt, sendbrk); +#endif + +#if defined(SO_OOBINLINE) + (void) setsockopt(net, SOL_SOCKET, SO_OOBINLINE, + (char *)&on, sizeof on); +#endif /* defined(SO_OOBINLINE) */ + +#ifdef SIGTSTP + (void) signal(SIGTSTP, SIG_IGN); +#endif +#ifdef SIGTTOU + /* + * Ignoring SIGTTOU keeps the kernel from blocking us + * in ttioct() in /sys/tty.c. + */ + (void) signal(SIGTTOU, SIG_IGN); +#endif + + (void) signal(SIGCHLD, cleanup); + +#if defined(CRAY2) && defined(UNICOS5) + /* + * Cray-2 will send a signal when pty modes are changed by slave + * side. Set up signal handler now. + */ + if ((int)signal(SIGUSR1, termstat) < 0) + perror("signal"); + else if (ioctl(p, TCSIGME, (char *)SIGUSR1) < 0) + perror("ioctl:TCSIGME"); + /* + * Make processing loop check terminal characteristics early on. + */ + termstat(); +#endif + +#ifdef TIOCNOTTY + { + register int t; + t = open(_PATH_TTY, O_RDWR); + if (t >= 0) { + (void) ioctl(t, TIOCNOTTY, (char *)0); + (void) close(t); + } + } +#endif + +#if defined(CRAY) && defined(NEWINIT) && defined(TIOCSCTTY) + (void) setsid(); + ioctl(p, TIOCSCTTY, 0); +#endif + + /* + * Show banner that getty never gave. + * + * We put the banner in the pty input buffer. This way, it + * gets carriage return null processing, etc., just like all + * other pty --> client data. + */ + +#if !defined(CRAY) || !defined(NEWINIT) + if (getenv("USER")) + hostinfo = 0; +#endif + + if (getent(defent, "default") == 1) { + char *getstr(); + char *cp=defstrs; + + HE = getstr("he", &cp); + HN = getstr("hn", &cp); + IM = getstr("im", &cp); + if (HN && *HN) + (void) strcpy(host_name, HN); + if (IM == 0) + IM = ""; + } else { + IM = DEFAULT_IM; + HE = 0; + } + edithost(HE, host_name); + if (hostinfo && *IM) + putf(IM, ptyibuf2); + + if (pcc) + (void) strncat(ptyibuf2, ptyip, pcc+1); + ptyip = ptyibuf2; + pcc = strlen(ptyip); +#ifdef LINEMODE + /* + * Last check to make sure all our states are correct. + */ + init_termbuf(); + localstat(); +#endif /* LINEMODE */ + + DIAG(TD_REPORT, + {sprintf(nfrontp, "td: Entering processing loop\r\n"); + nfrontp += strlen(nfrontp);}); + +#ifdef convex + startslave(host); +#endif + + nfd = ((f > p) ? f : p) + 1; + for (;;) { + fd_set ibits, obits, xbits; + register int c; + + if (ncc < 0 && pcc < 0) + break; + +#if defined(CRAY2) && defined(UNICOS5) + if (needtermstat) + _termstat(); +#endif /* defined(CRAY2) && defined(UNICOS5) */ + FD_ZERO(&ibits); + FD_ZERO(&obits); + FD_ZERO(&xbits); + /* + * Never look for input if there's still + * stuff in the corresponding output buffer + */ + if (nfrontp - nbackp || pcc > 0) { + FD_SET(f, &obits); + } else { + FD_SET(p, &ibits); + } + if (pfrontp - pbackp || ncc > 0) { + FD_SET(p, &obits); + } else { + FD_SET(f, &ibits); + } + if (!SYNCHing) { + FD_SET(f, &xbits); + } + if ((c = select(nfd, &ibits, &obits, &xbits, + (struct timeval *)0)) < 1) { + if (c == -1) { + if (errno == EINTR) { + continue; + } + } + sleep(5); + continue; + } + + /* + * Any urgent data? + */ + if (FD_ISSET(net, &xbits)) { + SYNCHing = 1; + } + + /* + * Something to read from the network... + */ + if (FD_ISSET(net, &ibits)) { +#if !defined(SO_OOBINLINE) + /* + * In 4.2 (and 4.3 beta) systems, the + * OOB indication and data handling in the kernel + * is such that if two separate TCP Urgent requests + * come in, one byte of TCP data will be overlaid. + * This is fatal for Telnet, but we try to live + * with it. + * + * In addition, in 4.2 (and...), a special protocol + * is needed to pick up the TCP Urgent data in + * the correct sequence. + * + * What we do is: if we think we are in urgent + * mode, we look to see if we are "at the mark". + * If we are, we do an OOB receive. If we run + * this twice, we will do the OOB receive twice, + * but the second will fail, since the second + * time we were "at the mark", but there wasn't + * any data there (the kernel doesn't reset + * "at the mark" until we do a normal read). + * Once we've read the OOB data, we go ahead + * and do normal reads. + * + * There is also another problem, which is that + * since the OOB byte we read doesn't put us + * out of OOB state, and since that byte is most + * likely the TELNET DM (data mark), we would + * stay in the TELNET SYNCH (SYNCHing) state. + * So, clocks to the rescue. If we've "just" + * received a DM, then we test for the + * presence of OOB data when the receive OOB + * fails (and AFTER we did the normal mode read + * to clear "at the mark"). + */ + if (SYNCHing) { + int atmark; + + (void) ioctl(net, SIOCATMARK, (char *)&atmark); + if (atmark) { + ncc = recv(net, netibuf, sizeof (netibuf), MSG_OOB); + if ((ncc == -1) && (errno == EINVAL)) { + ncc = read(net, netibuf, sizeof (netibuf)); + if (sequenceIs(didnetreceive, gotDM)) { + SYNCHing = stilloob(net); + } + } + } else { + ncc = read(net, netibuf, sizeof (netibuf)); + } + } else { + ncc = read(net, netibuf, sizeof (netibuf)); + } + settimer(didnetreceive); +#else /* !defined(SO_OOBINLINE)) */ + ncc = read(net, netibuf, sizeof (netibuf)); +#endif /* !defined(SO_OOBINLINE)) */ + if (ncc < 0 && errno == EWOULDBLOCK) + ncc = 0; + else { + if (ncc <= 0) { + break; + } + netip = netibuf; + } + DIAG((TD_REPORT | TD_NETDATA), + {sprintf(nfrontp, "td: netread %d chars\r\n", ncc); + nfrontp += strlen(nfrontp);}); + DIAG(TD_NETDATA, printdata("nd", netip, ncc)); + } + + /* + * Something to read from the pty... + */ + if (FD_ISSET(p, &ibits)) { +#ifndef STREAMSPTY + pcc = read(p, ptyibuf, BUFSIZ); +#else + pcc = readstream(p, ptyibuf, BUFSIZ); +#endif + /* + * On some systems, if we try to read something + * off the master side before the slave side is + * opened, we get EIO. + */ + if (pcc < 0 && (errno == EWOULDBLOCK || +#ifdef EAGAIN + errno == EAGAIN || +#endif + errno == EIO)) { + pcc = 0; + } else { + if (pcc <= 0) + break; +#if !defined(CRAY2) || !defined(UNICOS5) +#ifdef LINEMODE + /* + * If ioctl from pty, pass it through net + */ + if (ptyibuf[0] & TIOCPKT_IOCTL) { + copy_termbuf(ptyibuf+1, pcc-1); + localstat(); + pcc = 1; + } +#endif /* LINEMODE */ + if (ptyibuf[0] & TIOCPKT_FLUSHWRITE) { + netclear(); /* clear buffer back */ +#ifndef NO_URGENT + /* + * There are client telnets on some + * operating systems get screwed up + * royally if we send them urgent + * mode data. + */ + *nfrontp++ = IAC; + *nfrontp++ = DM; + neturg = nfrontp-1; /* off by one XXX */ + DIAG(TD_OPTIONS, + printoption("td: send IAC", DM)); + +#endif + } + if (his_state_is_will(TELOPT_LFLOW) && + (ptyibuf[0] & + (TIOCPKT_NOSTOP|TIOCPKT_DOSTOP))) { + int newflow = + ptyibuf[0] & TIOCPKT_DOSTOP ? 1 : 0; + if (newflow != flowmode) { + flowmode = newflow; + (void) sprintf(nfrontp, + "%c%c%c%c%c%c", + IAC, SB, TELOPT_LFLOW, + flowmode ? LFLOW_ON + : LFLOW_OFF, + IAC, SE); + nfrontp += 6; + DIAG(TD_OPTIONS, printsub('>', + (unsigned char *)nfrontp-4, + 4);); + } + } + pcc--; + ptyip = ptyibuf+1; +#else /* defined(CRAY2) && defined(UNICOS5) */ + if (!uselinemode) { + unpcc = pcc; + unptyip = ptyibuf; + pcc = term_output(&unptyip, ptyibuf2, + &unpcc, BUFSIZ); + ptyip = ptyibuf2; + } else + ptyip = ptyibuf; +#endif /* defined(CRAY2) && defined(UNICOS5) */ + } + } + + while (pcc > 0) { + if ((&netobuf[BUFSIZ] - nfrontp) < 2) + break; + c = *ptyip++ & 0377, pcc--; + if (c == IAC) + *nfrontp++ = c; +#if defined(CRAY2) && defined(UNICOS5) + else if (c == '\n' && + my_state_is_wont(TELOPT_BINARY) && newmap) + *nfrontp++ = '\r'; +#endif /* defined(CRAY2) && defined(UNICOS5) */ + *nfrontp++ = c; + if ((c == '\r') && (my_state_is_wont(TELOPT_BINARY))) { + if (pcc > 0 && ((*ptyip & 0377) == '\n')) { + *nfrontp++ = *ptyip++ & 0377; + pcc--; + } else + *nfrontp++ = '\0'; + } + } +#if defined(CRAY2) && defined(UNICOS5) + /* + * If chars were left over from the terminal driver, + * note their existence. + */ + if (!uselinemode && unpcc) { + pcc = unpcc; + unpcc = 0; + ptyip = unptyip; + } +#endif /* defined(CRAY2) && defined(UNICOS5) */ + + if (FD_ISSET(f, &obits) && (nfrontp - nbackp) > 0) + netflush(); + if (ncc > 0) + telrcv(); + if (FD_ISSET(p, &obits) && (pfrontp - pbackp) > 0) + ptyflush(); + } + cleanup(0); +} /* end of telnet */ + +#ifndef TCSIG +# ifdef TIOCSIG +# define TCSIG TIOCSIG +# endif +#endif + +#ifdef STREAMSPTY + +int flowison = -1; /* current state of flow: -1 is unknown */ + +int readstream(p, ibuf, bufsize) + int p; + char *ibuf; + int bufsize; +{ + int flags = 0; + int ret = 0; + struct termios *tsp; + struct termio *tp; + struct iocblk *ip; + char vstop, vstart; + int ixon; + int newflow; + + strbufc.maxlen = BUFSIZ; + strbufc.buf = (char *)ctlbuf; + strbufd.maxlen = bufsize-1; + strbufd.len = 0; + strbufd.buf = ibuf+1; + ibuf[0] = 0; + + ret = getmsg(p, &strbufc, &strbufd, &flags); + if (ret < 0) /* error of some sort -- probably EAGAIN */ + return(-1); + + if (strbufc.len <= 0 || ctlbuf[0] == M_DATA) { + /* data message */ + if (strbufd.len > 0) { /* real data */ + return(strbufd.len + 1); /* count header char */ + } else { + /* nothing there */ + errno = EAGAIN; + return(-1); + } + } + + /* + * It's a control message. Return 1, to look at the flag we set + */ + + switch (ctlbuf[0]) { + case M_FLUSH: + if (ibuf[1] & FLUSHW) + ibuf[0] = TIOCPKT_FLUSHWRITE; + return(1); + + case M_IOCTL: + ip = (struct iocblk *) (ibuf+1); + + switch (ip->ioc_cmd) { + case TCSETS: + case TCSETSW: + case TCSETSF: + tsp = (struct termios *) + (ibuf+1 + sizeof(struct iocblk)); + vstop = tsp->c_cc[VSTOP]; + vstart = tsp->c_cc[VSTART]; + ixon = tsp->c_iflag & IXON; + break; + case TCSETA: + case TCSETAW: + case TCSETAF: + tp = (struct termio *) (ibuf+1 + sizeof(struct iocblk)); + vstop = tp->c_cc[VSTOP]; + vstart = tp->c_cc[VSTART]; + ixon = tp->c_iflag & IXON; + break; + default: + errno = EAGAIN; + return(-1); + } + + newflow = (ixon && (vstart == 021) && (vstop == 023)) ? 1 : 0; + if (newflow != flowison) { /* it's a change */ + flowison = newflow; + ibuf[0] = newflow ? TIOCPKT_DOSTOP : TIOCPKT_NOSTOP; + return(1); + } + } + + /* nothing worth doing anything about */ + errno = EAGAIN; + return(-1); +} +#endif /* STREAMSPTY */ + +/* + * Send interrupt to process on other side of pty. + * If it is in raw mode, just write NULL; + * otherwise, write intr char. + */ + void +interrupt() +{ + ptyflush(); /* half-hearted */ + +#if defined(STREAMSPTY) && defined(TIOCSIGNAL) + /* Streams PTY style ioctl to post a signal */ + { + int sig = SIGINT; + (void) ioctl(pty, TIOCSIGNAL, &sig); + (void) ioctl(pty, I_FLUSH, FLUSHR); + } +#else +#ifdef TCSIG + (void) ioctl(pty, TCSIG, (char *)SIGINT); +#else /* TCSIG */ + init_termbuf(); + *pfrontp++ = slctab[SLC_IP].sptr ? + (unsigned char)*slctab[SLC_IP].sptr : '\177'; +#endif /* TCSIG */ +#endif +} + +/* + * Send quit to process on other side of pty. + * If it is in raw mode, just write NULL; + * otherwise, write quit char. + */ + void +sendbrk() +{ + ptyflush(); /* half-hearted */ +#ifdef TCSIG + (void) ioctl(pty, TCSIG, (char *)SIGQUIT); +#else /* TCSIG */ + init_termbuf(); + *pfrontp++ = slctab[SLC_ABORT].sptr ? + (unsigned char)*slctab[SLC_ABORT].sptr : '\034'; +#endif /* TCSIG */ +} + + void +sendsusp() +{ +#ifdef SIGTSTP + ptyflush(); /* half-hearted */ +# ifdef TCSIG + (void) ioctl(pty, TCSIG, (char *)SIGTSTP); +# else /* TCSIG */ + *pfrontp++ = slctab[SLC_SUSP].sptr ? + (unsigned char)*slctab[SLC_SUSP].sptr : '\032'; +# endif /* TCSIG */ +#endif /* SIGTSTP */ +} + +/* + * When we get an AYT, if ^T is enabled, use that. Otherwise, + * just send back "[Yes]". + */ + void +recv_ayt() +{ +#if defined(SIGINFO) && defined(TCSIG) + if (slctab[SLC_AYT].sptr && *slctab[SLC_AYT].sptr != _POSIX_VDISABLE) { + (void) ioctl(pty, TCSIG, (char *)SIGINFO); + return; + } +#endif + (void) strcpy(nfrontp, "\r\n[Yes]\r\n"); + nfrontp += 9; +} + + void +doeof() +{ + init_termbuf(); + +#if defined(LINEMODE) && defined(USE_TERMIO) && (VEOF == VMIN) + if (!tty_isediting()) { + extern char oldeofc; + *pfrontp++ = oldeofc; + return; + } +#endif + *pfrontp++ = slctab[SLC_EOF].sptr ? + (unsigned char)*slctab[SLC_EOF].sptr : '\004'; +} diff --git a/telnetd/telnetd.h b/telnetd/telnetd.h new file mode 100644 index 0000000..234b973 --- /dev/null +++ b/telnetd/telnetd.h @@ -0,0 +1,49 @@ +/* + * Copyright (c) 1989, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)telnetd.h 8.1 (Berkeley) 6/4/93 + */ + + +#include "defs.h" +#include "ext.h" + +#ifdef DIAGNOSTICS +#define DIAG(a,b) if (diagnostic & (a)) b +#else +#define DIAG(a,b) +#endif + +/* other external variables */ +extern char **environ; +extern int errno; + diff --git a/telnetd/termstat.c b/telnetd/termstat.c new file mode 100644 index 0000000..ebc843a --- /dev/null +++ b/telnetd/termstat.c @@ -0,0 +1,660 @@ +/* + * Copyright (c) 1989, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)termstat.c 8.2 (Berkeley) 5/30/95"; +#endif /* not lint */ + +#include "telnetd.h" + +/* + * local variables + */ +int def_tspeed = -1, def_rspeed = -1; +#ifdef TIOCSWINSZ +int def_row = 0, def_col = 0; +#endif +#ifdef LINEMODE +static int _terminit = 0; +#endif /* LINEMODE */ + +#if defined(CRAY2) && defined(UNICOS5) +int newmap = 1; /* nonzero if \n maps to ^M^J */ +#endif + +#ifdef LINEMODE +/* + * localstat + * + * This function handles all management of linemode. + * + * Linemode allows the client to do the local editing of data + * and send only complete lines to the server. Linemode state is + * based on the state of the pty driver. If the pty is set for + * external processing, then we can use linemode. Further, if we + * can use real linemode, then we can look at the edit control bits + * in the pty to determine what editing the client should do. + * + * Linemode support uses the following state flags to keep track of + * current and desired linemode state. + * alwayslinemode : true if -l was specified on the telnetd + * command line. It means to have linemode on as much as + * possible. + * + * lmodetype: signifies whether the client can + * handle real linemode, or if use of kludgeomatic linemode + * is preferred. It will be set to one of the following: + * REAL_LINEMODE : use linemode option + * NO_KLUDGE : don't initiate kludge linemode. + * KLUDGE_LINEMODE : use kludge linemode + * NO_LINEMODE : client is ignorant of linemode + * + * linemode, uselinemode : linemode is true if linemode + * is currently on, uselinemode is the state that we wish + * to be in. If another function wishes to turn linemode + * on or off, it sets or clears uselinemode. + * + * editmode, useeditmode : like linemode/uselinemode, but + * these contain the edit mode states (edit and trapsig). + * + * The state variables correspond to some of the state information + * in the pty. + * linemode: + * In real linemode, this corresponds to whether the pty + * expects external processing of incoming data. + * In kludge linemode, this more closely corresponds to the + * whether normal processing is on or not. (ICANON in + * system V, or COOKED mode in BSD.) + * If the -l option was specified (alwayslinemode), then + * an attempt is made to force external processing on at + * all times. + * + * The following heuristics are applied to determine linemode + * handling within the server. + * 1) Early on in starting up the server, an attempt is made + * to negotiate the linemode option. If this succeeds + * then lmodetype is set to REAL_LINEMODE and all linemode + * processing occurs in the context of the linemode option. + * 2) If the attempt to negotiate the linemode option failed, + * and the "-k" (don't initiate kludge linemode) isn't set, + * then we try to use kludge linemode. We test for this + * capability by sending "do Timing Mark". If a positive + * response comes back, then we assume that the client + * understands kludge linemode (ech!) and the + * lmodetype flag is set to KLUDGE_LINEMODE. + * 3) Otherwise, linemode is not supported at all and + * lmodetype remains set to NO_LINEMODE (which happens + * to be 0 for convenience). + * 4) At any time a command arrives that implies a higher + * state of linemode support in the client, we move to that + * linemode support. + * + * A short explanation of kludge linemode is in order here. + * 1) The heuristic to determine support for kludge linemode + * is to send a do timing mark. We assume that a client + * that supports timing marks also supports kludge linemode. + * A risky proposition at best. + * 2) Further negotiation of linemode is done by changing the + * the server's state regarding SGA. If server will SGA, + * then linemode is off, if server won't SGA, then linemode + * is on. + */ + void +localstat() +{ + void netflush(); + int need_will_echo = 0; + +#if defined(CRAY2) && defined(UNICOS5) + /* + * Keep track of that ol' CR/NL mapping while we're in the + * neighborhood. + */ + newmap = tty_isnewmap(); +#endif /* defined(CRAY2) && defined(UNICOS5) */ + + /* + * Check for state of BINARY options. + */ + if (tty_isbinaryin()) { + if (his_want_state_is_wont(TELOPT_BINARY)) + send_do(TELOPT_BINARY, 1); + } else { + if (his_want_state_is_will(TELOPT_BINARY)) + send_dont(TELOPT_BINARY, 1); + } + + if (tty_isbinaryout()) { + if (my_want_state_is_wont(TELOPT_BINARY)) + send_will(TELOPT_BINARY, 1); + } else { + if (my_want_state_is_will(TELOPT_BINARY)) + send_wont(TELOPT_BINARY, 1); + } + + /* + * Check for changes to flow control if client supports it. + */ + flowstat(); + + /* + * Check linemode on/off state + */ + uselinemode = tty_linemode(); + + /* + * If alwayslinemode is on, and pty is changing to turn it off, then + * force linemode back on. + */ + if (alwayslinemode && linemode && !uselinemode) { + uselinemode = 1; + tty_setlinemode(uselinemode); + } + +#ifdef ENCRYPTION + /* + * If the terminal is not echoing, but editing is enabled, + * something like password input is going to happen, so + * if we the other side is not currently sending encrypted + * data, ask the other side to start encrypting. + */ + if (his_state_is_will(TELOPT_ENCRYPT)) { + static int enc_passwd = 0; + if (uselinemode && !tty_isecho() && tty_isediting() + && (enc_passwd == 0) && !decrypt_input) { + encrypt_send_request_start(); + enc_passwd = 1; + } else if (enc_passwd) { + encrypt_send_request_end(); + enc_passwd = 0; + } + } +#endif /* ENCRYPTION */ + + /* + * Do echo mode handling as soon as we know what the + * linemode is going to be. + * If the pty has echo turned off, then tell the client that + * the server will echo. If echo is on, then the server + * will echo if in character mode, but in linemode the + * client should do local echoing. The state machine will + * not send anything if it is unnecessary, so don't worry + * about that here. + * + * If we need to send the WILL ECHO (because echo is off), + * then delay that until after we have changed the MODE. + * This way, when the user is turning off both editing + * and echo, the client will get editing turned off first. + * This keeps the client from going into encryption mode + * and then right back out if it is doing auto-encryption + * when passwords are being typed. + */ + if (uselinemode) { + if (tty_isecho()) + send_wont(TELOPT_ECHO, 1); + else + need_will_echo = 1; +#ifdef KLUDGELINEMODE + if (lmodetype == KLUDGE_OK) + lmodetype = KLUDGE_LINEMODE; +#endif + } + + /* + * If linemode is being turned off, send appropriate + * command and then we're all done. + */ + if (!uselinemode && linemode) { +# ifdef KLUDGELINEMODE + if (lmodetype == REAL_LINEMODE) { +# endif /* KLUDGELINEMODE */ + send_dont(TELOPT_LINEMODE, 1); +# ifdef KLUDGELINEMODE + } else if (lmodetype == KLUDGE_LINEMODE) + send_will(TELOPT_SGA, 1); +# endif /* KLUDGELINEMODE */ + send_will(TELOPT_ECHO, 1); + linemode = uselinemode; + goto done; + } + +# ifdef KLUDGELINEMODE + /* + * If using real linemode check edit modes for possible later use. + * If we are in kludge linemode, do the SGA negotiation. + */ + if (lmodetype == REAL_LINEMODE) { +# endif /* KLUDGELINEMODE */ + useeditmode = 0; + if (tty_isediting()) + useeditmode |= MODE_EDIT; + if (tty_istrapsig()) + useeditmode |= MODE_TRAPSIG; + if (tty_issofttab()) + useeditmode |= MODE_SOFT_TAB; + if (tty_islitecho()) + useeditmode |= MODE_LIT_ECHO; +# ifdef KLUDGELINEMODE + } else if (lmodetype == KLUDGE_LINEMODE) { + if (tty_isediting() && uselinemode) + send_wont(TELOPT_SGA, 1); + else + send_will(TELOPT_SGA, 1); + } +# endif /* KLUDGELINEMODE */ + + /* + * Negotiate linemode on if pty state has changed to turn it on. + * Send appropriate command and send along edit mode, then all done. + */ + if (uselinemode && !linemode) { +# ifdef KLUDGELINEMODE + if (lmodetype == KLUDGE_LINEMODE) { + send_wont(TELOPT_SGA, 1); + } else if (lmodetype == REAL_LINEMODE) { +# endif /* KLUDGELINEMODE */ + send_do(TELOPT_LINEMODE, 1); + /* send along edit modes */ + (void) sprintf(nfrontp, "%c%c%c%c%c%c%c", IAC, SB, + TELOPT_LINEMODE, LM_MODE, useeditmode, + IAC, SE); + nfrontp += 7; + editmode = useeditmode; +# ifdef KLUDGELINEMODE + } +# endif /* KLUDGELINEMODE */ + linemode = uselinemode; + goto done; + } + +# ifdef KLUDGELINEMODE + /* + * None of what follows is of any value if not using + * real linemode. + */ + if (lmodetype < REAL_LINEMODE) + goto done; +# endif /* KLUDGELINEMODE */ + + if (linemode && his_state_is_will(TELOPT_LINEMODE)) { + /* + * If edit mode changed, send edit mode. + */ + if (useeditmode != editmode) { + /* + * Send along appropriate edit mode mask. + */ + (void) sprintf(nfrontp, "%c%c%c%c%c%c%c", IAC, SB, + TELOPT_LINEMODE, LM_MODE, useeditmode, + IAC, SE); + nfrontp += 7; + editmode = useeditmode; + } + + + /* + * Check for changes to special characters in use. + */ + start_slc(0); + check_slc(); + (void) end_slc(0); + } + +done: + if (need_will_echo) + send_will(TELOPT_ECHO, 1); + /* + * Some things should be deferred until after the pty state has + * been set by the local process. Do those things that have been + * deferred now. This only happens once. + */ + if (_terminit == 0) { + _terminit = 1; + defer_terminit(); + } + + netflush(); + set_termbuf(); + return; + +} /* end of localstat */ +#endif /* LINEMODE */ + +/* + * flowstat + * + * Check for changes to flow control + */ + void +flowstat() +{ + if (his_state_is_will(TELOPT_LFLOW)) { + if (tty_flowmode() != flowmode) { + flowmode = tty_flowmode(); + (void) sprintf(nfrontp, "%c%c%c%c%c%c", + IAC, SB, TELOPT_LFLOW, + flowmode ? LFLOW_ON : LFLOW_OFF, + IAC, SE); + nfrontp += 6; + } + if (tty_restartany() != restartany) { + restartany = tty_restartany(); + (void) sprintf(nfrontp, "%c%c%c%c%c%c", + IAC, SB, TELOPT_LFLOW, + restartany ? LFLOW_RESTART_ANY + : LFLOW_RESTART_XON, + IAC, SE); + nfrontp += 6; + } + } +} + +/* + * clientstat + * + * Process linemode related requests from the client. + * Client can request a change to only one of linemode, editmode or slc's + * at a time, and if using kludge linemode, then only linemode may be + * affected. + */ + void +clientstat(code, parm1, parm2) + register int code, parm1, parm2; +{ + void netflush(); + + /* + * Get a copy of terminal characteristics. + */ + init_termbuf(); + + /* + * Process request from client. code tells what it is. + */ + switch (code) { +#ifdef LINEMODE + case TELOPT_LINEMODE: + /* + * Don't do anything unless client is asking us to change + * modes. + */ + uselinemode = (parm1 == WILL); + if (uselinemode != linemode) { +# ifdef KLUDGELINEMODE + /* + * If using kludge linemode, make sure that + * we can do what the client asks. + * We can not turn off linemode if alwayslinemode + * and the ICANON bit is set. + */ + if (lmodetype == KLUDGE_LINEMODE) { + if (alwayslinemode && tty_isediting()) { + uselinemode = 1; + } + } + + /* + * Quit now if we can't do it. + */ + if (uselinemode == linemode) + return; + + /* + * If using real linemode and linemode is being + * turned on, send along the edit mode mask. + */ + if (lmodetype == REAL_LINEMODE && uselinemode) +# else /* KLUDGELINEMODE */ + if (uselinemode) +# endif /* KLUDGELINEMODE */ + { + useeditmode = 0; + if (tty_isediting()) + useeditmode |= MODE_EDIT; + if (tty_istrapsig) + useeditmode |= MODE_TRAPSIG; + if (tty_issofttab()) + useeditmode |= MODE_SOFT_TAB; + if (tty_islitecho()) + useeditmode |= MODE_LIT_ECHO; + (void) sprintf(nfrontp, "%c%c%c%c%c%c%c", IAC, + SB, TELOPT_LINEMODE, LM_MODE, + useeditmode, IAC, SE); + nfrontp += 7; + editmode = useeditmode; + } + + + tty_setlinemode(uselinemode); + + linemode = uselinemode; + + if (!linemode) + send_will(TELOPT_ECHO, 1); + } + break; + + case LM_MODE: + { + register int ack, changed; + + /* + * Client has sent along a mode mask. If it agrees with + * what we are currently doing, ignore it; if not, it could + * be viewed as a request to change. Note that the server + * will change to the modes in an ack if it is different from + * what we currently have, but we will not ack the ack. + */ + useeditmode &= MODE_MASK; + ack = (useeditmode & MODE_ACK); + useeditmode &= ~MODE_ACK; + + if (changed = (useeditmode ^ editmode)) { + /* + * This check is for a timing problem. If the + * state of the tty has changed (due to the user + * application) we need to process that info + * before we write in the state contained in the + * ack!!! This gets out the new MODE request, + * and when the ack to that command comes back + * we'll set it and be in the right mode. + */ + if (ack) + localstat(); + if (changed & MODE_EDIT) + tty_setedit(useeditmode & MODE_EDIT); + + if (changed & MODE_TRAPSIG) + tty_setsig(useeditmode & MODE_TRAPSIG); + + if (changed & MODE_SOFT_TAB) + tty_setsofttab(useeditmode & MODE_SOFT_TAB); + + if (changed & MODE_LIT_ECHO) + tty_setlitecho(useeditmode & MODE_LIT_ECHO); + + set_termbuf(); + + if (!ack) { + (void) sprintf(nfrontp, "%c%c%c%c%c%c%c", IAC, + SB, TELOPT_LINEMODE, LM_MODE, + useeditmode|MODE_ACK, + IAC, SE); + nfrontp += 7; + } + + editmode = useeditmode; + } + + break; + + } /* end of case LM_MODE */ +#endif /* LINEMODE */ + + case TELOPT_NAWS: +#ifdef TIOCSWINSZ + { + struct winsize ws; + + def_col = parm1; + def_row = parm2; +#ifdef LINEMODE + /* + * Defer changing window size until after terminal is + * initialized. + */ + if (terminit() == 0) + return; +#endif /* LINEMODE */ + + /* + * Change window size as requested by client. + */ + + ws.ws_col = parm1; + ws.ws_row = parm2; + (void) ioctl(pty, TIOCSWINSZ, (char *)&ws); + } +#endif /* TIOCSWINSZ */ + + break; + + case TELOPT_TSPEED: + { + def_tspeed = parm1; + def_rspeed = parm2; +#ifdef LINEMODE + /* + * Defer changing the terminal speed. + */ + if (terminit() == 0) + return; +#endif /* LINEMODE */ + /* + * Change terminal speed as requested by client. + * We set the receive speed first, so that if we can't + * store seperate receive and transmit speeds, the transmit + * speed will take precedence. + */ + tty_rspeed(parm2); + tty_tspeed(parm1); + set_termbuf(); + + break; + + } /* end of case TELOPT_TSPEED */ + + default: + /* What? */ + break; + } /* end of switch */ + +#if defined(CRAY2) && defined(UNICOS5) + /* + * Just in case of the likely event that we changed the pty state. + */ + rcv_ioctl(); +#endif /* defined(CRAY2) && defined(UNICOS5) */ + + netflush(); + +} /* end of clientstat */ + +#if defined(CRAY2) && defined(UNICOS5) + void +termstat() +{ + needtermstat = 1; +} + + void +_termstat() +{ + needtermstat = 0; + init_termbuf(); + localstat(); + rcv_ioctl(); +} +#endif /* defined(CRAY2) && defined(UNICOS5) */ + +#ifdef LINEMODE +/* + * defer_terminit + * + * Some things should not be done until after the login process has started + * and all the pty modes are set to what they are supposed to be. This + * function is called when the pty state has been processed for the first time. + * It calls other functions that do things that were deferred in each module. + */ + void +defer_terminit() +{ + + /* + * local stuff that got deferred. + */ + if (def_tspeed != -1) { + clientstat(TELOPT_TSPEED, def_tspeed, def_rspeed); + def_tspeed = def_rspeed = 0; + } + +#ifdef TIOCSWINSZ + if (def_col || def_row) { + struct winsize ws; + + memset((char *)&ws, 0, sizeof(ws)); + ws.ws_col = def_col; + ws.ws_row = def_row; + (void) ioctl(pty, TIOCSWINSZ, (char *)&ws); + } +#endif + + /* + * The only other module that currently defers anything. + */ + deferslc(); + +} /* end of defer_terminit */ + +/* + * terminit + * + * Returns true if the pty state has been processed yet. + */ + int +terminit() +{ + return(_terminit); + +} /* end of terminit */ +#endif /* LINEMODE */ diff --git a/telnetd/utility.c b/telnetd/utility.c new file mode 100644 index 0000000..9553d58 --- /dev/null +++ b/telnetd/utility.c @@ -0,0 +1,1192 @@ +/* + * Copyright (c) 1989, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)utility.c 8.4 (Berkeley) 5/30/95"; +#endif /* not lint */ + +#define PRINTOPTIONS +#include "telnetd.h" + +/* + * utility functions performing io related tasks + */ + +/* + * ttloop + * + * A small subroutine to flush the network output buffer, get some data + * from the network, and pass it through the telnet state machine. We + * also flush the pty input buffer (by dropping its data) if it becomes + * too full. + */ + + void +ttloop() +{ + void netflush(); + + DIAG(TD_REPORT, {sprintf(nfrontp, "td: ttloop\r\n"); + nfrontp += strlen(nfrontp);}); + if (nfrontp-nbackp) { + netflush(); + } + ncc = read(net, netibuf, sizeof netibuf); + if (ncc < 0) { + syslog(LOG_INFO, "ttloop: read: %m\n"); + exit(1); + } else if (ncc == 0) { + syslog(LOG_INFO, "ttloop: peer died: %m\n"); + exit(1); + } + DIAG(TD_REPORT, {sprintf(nfrontp, "td: ttloop read %d chars\r\n", ncc); + nfrontp += strlen(nfrontp);}); + netip = netibuf; + telrcv(); /* state machine */ + if (ncc > 0) { + pfrontp = pbackp = ptyobuf; + telrcv(); + } +} /* end of ttloop */ + +/* + * Check a descriptor to see if out of band data exists on it. + */ + int +stilloob(s) + int s; /* socket number */ +{ + static struct timeval timeout = { 0 }; + fd_set excepts; + int value; + + do { + FD_ZERO(&excepts); + FD_SET(s, &excepts); + value = select(s+1, (fd_set *)0, (fd_set *)0, &excepts, &timeout); + } while ((value == -1) && (errno == EINTR)); + + if (value < 0) { + fatalperror(pty, "select"); + } + if (FD_ISSET(s, &excepts)) { + return 1; + } else { + return 0; + } +} + + void +ptyflush() +{ + int n; + + if ((n = pfrontp - pbackp) > 0) { + DIAG((TD_REPORT | TD_PTYDATA), + { sprintf(nfrontp, "td: ptyflush %d chars\r\n", n); + nfrontp += strlen(nfrontp); }); + DIAG(TD_PTYDATA, printdata("pd", pbackp, n)); + n = write(pty, pbackp, n); + } + if (n < 0) { + if (errno == EWOULDBLOCK || errno == EINTR) + return; + cleanup(0); + } + pbackp += n; + if (pbackp == pfrontp) + pbackp = pfrontp = ptyobuf; +} + +/* + * nextitem() + * + * Return the address of the next "item" in the TELNET data + * stream. This will be the address of the next character if + * the current address is a user data character, or it will + * be the address of the character following the TELNET command + * if the current address is a TELNET IAC ("I Am a Command") + * character. + */ + char * +nextitem(current) + char *current; +{ + if ((*current&0xff) != IAC) { + return current+1; + } + switch (*(current+1)&0xff) { + case DO: + case DONT: + case WILL: + case WONT: + return current+3; + case SB: /* loop forever looking for the SE */ + { + register char *look = current+2; + + for (;;) { + if ((*look++&0xff) == IAC) { + if ((*look++&0xff) == SE) { + return look; + } + } + } + } + default: + return current+2; + } +} /* end of nextitem */ + + +/* + * netclear() + * + * We are about to do a TELNET SYNCH operation. Clear + * the path to the network. + * + * Things are a bit tricky since we may have sent the first + * byte or so of a previous TELNET command into the network. + * So, we have to scan the network buffer from the beginning + * until we are up to where we want to be. + * + * A side effect of what we do, just to keep things + * simple, is to clear the urgent data pointer. The principal + * caller should be setting the urgent data pointer AFTER calling + * us in any case. + */ + void +netclear() +{ + register char *thisitem, *next; + char *good; +#define wewant(p) ((nfrontp > p) && ((*p&0xff) == IAC) && \ + ((*(p+1)&0xff) != EC) && ((*(p+1)&0xff) != EL)) + +#ifdef ENCRYPTION + thisitem = nclearto > netobuf ? nclearto : netobuf; +#else /* ENCRYPTION */ + thisitem = netobuf; +#endif /* ENCRYPTION */ + + while ((next = nextitem(thisitem)) <= nbackp) { + thisitem = next; + } + + /* Now, thisitem is first before/at boundary. */ + +#ifdef ENCRYPTION + good = nclearto > netobuf ? nclearto : netobuf; +#else /* ENCRYPTION */ + good = netobuf; /* where the good bytes go */ +#endif /* ENCRYPTION */ + + while (nfrontp > thisitem) { + if (wewant(thisitem)) { + int length; + + next = thisitem; + do { + next = nextitem(next); + } while (wewant(next) && (nfrontp > next)); + length = next-thisitem; + memmove(good, thisitem, length); + good += length; + thisitem = next; + } else { + thisitem = nextitem(thisitem); + } + } + + nbackp = netobuf; + nfrontp = good; /* next byte to be sent */ + neturg = 0; +} /* end of netclear */ + +/* + * netflush + * Send as much data as possible to the network, + * handling requests for urgent data. + */ + void +netflush() +{ + int n; + extern int not42; + + if ((n = nfrontp - nbackp) > 0) { + DIAG(TD_REPORT, + { sprintf(nfrontp, "td: netflush %d chars\r\n", n); + n += strlen(nfrontp); /* get count first */ + nfrontp += strlen(nfrontp); /* then move pointer */ + }); +#ifdef ENCRYPTION + if (encrypt_output) { + char *s = nclearto ? nclearto : nbackp; + if (nfrontp - s > 0) { + (*encrypt_output)((unsigned char *)s, nfrontp-s); + nclearto = nfrontp; + } + } +#endif /* ENCRYPTION */ + /* + * if no urgent data, or if the other side appears to be an + * old 4.2 client (and thus unable to survive TCP urgent data), + * write the entire buffer in non-OOB mode. + */ + if ((neturg == 0) || (not42 == 0)) { + n = write(net, nbackp, n); /* normal write */ + } else { + n = neturg - nbackp; + /* + * In 4.2 (and 4.3) systems, there is some question about + * what byte in a sendOOB operation is the "OOB" data. + * To make ourselves compatible, we only send ONE byte + * out of band, the one WE THINK should be OOB (though + * we really have more the TCP philosophy of urgent data + * rather than the Unix philosophy of OOB data). + */ + if (n > 1) { + n = send(net, nbackp, n-1, 0); /* send URGENT all by itself */ + } else { + n = send(net, nbackp, n, MSG_OOB); /* URGENT data */ + } + } + } + if (n < 0) { + if (errno == EWOULDBLOCK || errno == EINTR) + return; + cleanup(0); + } + nbackp += n; +#ifdef ENCRYPTION + if (nbackp > nclearto) + nclearto = 0; +#endif /* ENCRYPTION */ + if (nbackp >= neturg) { + neturg = 0; + } + if (nbackp == nfrontp) { + nbackp = nfrontp = netobuf; +#ifdef ENCRYPTION + nclearto = 0; +#endif /* ENCRYPTION */ + } + return; +} /* end of netflush */ + + +/* + * writenet + * + * Just a handy little function to write a bit of raw data to the net. + * It will force a transmit of the buffer if necessary + * + * arguments + * ptr - A pointer to a character string to write + * len - How many bytes to write + */ + void +writenet(ptr, len) + register unsigned char *ptr; + register int len; +{ + /* flush buffer if no room for new data) */ + if ((&netobuf[BUFSIZ] - nfrontp) < len) { + /* if this fails, don't worry, buffer is a little big */ + netflush(); + } + + memmove(nfrontp, ptr, len); + nfrontp += len; + +} /* end of writenet */ + + +/* + * miscellaneous functions doing a variety of little jobs follow ... + */ + + + void +fatal(f, msg) + int f; + char *msg; +{ + char buf[BUFSIZ]; + + (void) sprintf(buf, "telnetd: %s.\r\n", msg); +#ifdef ENCRYPTION + if (encrypt_output) { + /* + * Better turn off encryption first.... + * Hope it flushes... + */ + encrypt_send_end(); + netflush(); + } +#endif /* ENCRYPTION */ + (void) write(f, buf, (int)strlen(buf)); + sleep(1); /*XXX*/ + exit(1); +} + + void +fatalperror(f, msg) + int f; + char *msg; +{ + char buf[BUFSIZ], *strerror(); + + (void) sprintf(buf, "%s: %s", msg, strerror(errno)); + fatal(f, buf); +} + +char editedhost[32]; + + void +edithost(pat, host) + register char *pat; + register char *host; +{ + register char *res = editedhost; + char *strncpy(); + + if (!pat) + pat = ""; + while (*pat) { + switch (*pat) { + + case '#': + if (*host) + host++; + break; + + case '@': + if (*host) + *res++ = *host++; + break; + + default: + *res++ = *pat; + break; + } + if (res == &editedhost[sizeof editedhost - 1]) { + *res = '\0'; + return; + } + pat++; + } + if (*host) + (void) strncpy(res, host, + sizeof editedhost - (res - editedhost) -1); + else + *res = '\0'; + editedhost[sizeof editedhost - 1] = '\0'; +} + +static char *putlocation; + + void +putstr(s) + register char *s; +{ + + while (*s) + putchr(*s++); +} + + void +putchr(cc) + int cc; +{ + *putlocation++ = cc; +} + +/* + * This is split on two lines so that SCCS will not see the M + * between two % signs and expand it... + */ +static char fmtstr[] = { "%l:%M\ +%P on %A, %d %B %Y" }; + + void +putf(cp, where) + register char *cp; + char *where; +{ + char *slash; + time_t t; + char db[100]; +#ifdef STREAMSPTY + extern char *strchr(); +#else + extern char *strrchr(); +#endif + + putlocation = where; + + while (*cp) { + if (*cp != '%') { + putchr(*cp++); + continue; + } + switch (*++cp) { + + case 't': +#ifdef STREAMSPTY + /* names are like /dev/pts/2 -- we want pts/2 */ + slash = strchr(line+1, '/'); +#else + slash = strrchr(line, '/'); +#endif + if (slash == (char *) 0) + putstr(line); + else + putstr(&slash[1]); + break; + + case 'h': + putstr(editedhost); + break; + + case 'd': + (void)time(&t); + (void)strftime(db, sizeof(db), fmtstr, localtime(&t)); + putstr(db); + break; + + case '%': + putchr('%'); + break; + } + cp++; + } +} + +#ifdef DIAGNOSTICS +/* + * Print telnet options and commands in plain text, if possible. + */ + void +printoption(fmt, option) + register char *fmt; + register int option; +{ + if (TELOPT_OK(option)) + sprintf(nfrontp, "%s %s\r\n", fmt, TELOPT(option)); + else if (TELCMD_OK(option)) + sprintf(nfrontp, "%s %s\r\n", fmt, TELCMD(option)); + else + sprintf(nfrontp, "%s %d\r\n", fmt, option); + nfrontp += strlen(nfrontp); + return; +} + + void +printsub(direction, pointer, length) + char direction; /* '<' or '>' */ + unsigned char *pointer; /* where suboption data sits */ + int length; /* length of suboption data */ +{ + register int i; + char buf[512]; + + if (!(diagnostic & TD_OPTIONS)) + return; + + if (direction) { + sprintf(nfrontp, "td: %s suboption ", + direction == '<' ? "recv" : "send"); + nfrontp += strlen(nfrontp); + if (length >= 3) { + register int j; + + i = pointer[length-2]; + j = pointer[length-1]; + + if (i != IAC || j != SE) { + sprintf(nfrontp, "(terminated by "); + nfrontp += strlen(nfrontp); + if (TELOPT_OK(i)) + sprintf(nfrontp, "%s ", TELOPT(i)); + else if (TELCMD_OK(i)) + sprintf(nfrontp, "%s ", TELCMD(i)); + else + sprintf(nfrontp, "%d ", i); + nfrontp += strlen(nfrontp); + if (TELOPT_OK(j)) + sprintf(nfrontp, "%s", TELOPT(j)); + else if (TELCMD_OK(j)) + sprintf(nfrontp, "%s", TELCMD(j)); + else + sprintf(nfrontp, "%d", j); + nfrontp += strlen(nfrontp); + sprintf(nfrontp, ", not IAC SE!) "); + nfrontp += strlen(nfrontp); + } + } + length -= 2; + } + if (length < 1) { + sprintf(nfrontp, "(Empty suboption??\?)"); + nfrontp += strlen(nfrontp); + return; + } + switch (pointer[0]) { + case TELOPT_TTYPE: + sprintf(nfrontp, "TERMINAL-TYPE "); + nfrontp += strlen(nfrontp); + switch (pointer[1]) { + case TELQUAL_IS: + sprintf(nfrontp, "IS \"%.*s\"", length-2, (char *)pointer+2); + break; + case TELQUAL_SEND: + sprintf(nfrontp, "SEND"); + break; + default: + sprintf(nfrontp, + "- unknown qualifier %d (0x%x).", + pointer[1], pointer[1]); + } + nfrontp += strlen(nfrontp); + break; + case TELOPT_TSPEED: + sprintf(nfrontp, "TERMINAL-SPEED"); + nfrontp += strlen(nfrontp); + if (length < 2) { + sprintf(nfrontp, " (empty suboption??\?)"); + nfrontp += strlen(nfrontp); + break; + } + switch (pointer[1]) { + case TELQUAL_IS: + sprintf(nfrontp, " IS %.*s", length-2, (char *)pointer+2); + nfrontp += strlen(nfrontp); + break; + default: + if (pointer[1] == 1) + sprintf(nfrontp, " SEND"); + else + sprintf(nfrontp, " %d (unknown)", pointer[1]); + nfrontp += strlen(nfrontp); + for (i = 2; i < length; i++) { + sprintf(nfrontp, " ?%d?", pointer[i]); + nfrontp += strlen(nfrontp); + } + break; + } + break; + + case TELOPT_LFLOW: + sprintf(nfrontp, "TOGGLE-FLOW-CONTROL"); + nfrontp += strlen(nfrontp); + if (length < 2) { + sprintf(nfrontp, " (empty suboption??\?)"); + nfrontp += strlen(nfrontp); + break; + } + switch (pointer[1]) { + case LFLOW_OFF: + sprintf(nfrontp, " OFF"); break; + case LFLOW_ON: + sprintf(nfrontp, " ON"); break; + case LFLOW_RESTART_ANY: + sprintf(nfrontp, " RESTART-ANY"); break; + case LFLOW_RESTART_XON: + sprintf(nfrontp, " RESTART-XON"); break; + default: + sprintf(nfrontp, " %d (unknown)", pointer[1]); + } + nfrontp += strlen(nfrontp); + for (i = 2; i < length; i++) { + sprintf(nfrontp, " ?%d?", pointer[i]); + nfrontp += strlen(nfrontp); + } + break; + + case TELOPT_NAWS: + sprintf(nfrontp, "NAWS"); + nfrontp += strlen(nfrontp); + if (length < 2) { + sprintf(nfrontp, " (empty suboption??\?)"); + nfrontp += strlen(nfrontp); + break; + } + if (length == 2) { + sprintf(nfrontp, " ?%d?", pointer[1]); + nfrontp += strlen(nfrontp); + break; + } + sprintf(nfrontp, " %d %d (%d)", + pointer[1], pointer[2], + (int)((((unsigned int)pointer[1])<<8)|((unsigned int)pointer[2]))); + nfrontp += strlen(nfrontp); + if (length == 4) { + sprintf(nfrontp, " ?%d?", pointer[3]); + nfrontp += strlen(nfrontp); + break; + } + sprintf(nfrontp, " %d %d (%d)", + pointer[3], pointer[4], + (int)((((unsigned int)pointer[3])<<8)|((unsigned int)pointer[4]))); + nfrontp += strlen(nfrontp); + for (i = 5; i < length; i++) { + sprintf(nfrontp, " ?%d?", pointer[i]); + nfrontp += strlen(nfrontp); + } + break; + + case TELOPT_LINEMODE: + sprintf(nfrontp, "LINEMODE "); + nfrontp += strlen(nfrontp); + if (length < 2) { + sprintf(nfrontp, " (empty suboption??\?)"); + nfrontp += strlen(nfrontp); + break; + } + switch (pointer[1]) { + case WILL: + sprintf(nfrontp, "WILL "); + goto common; + case WONT: + sprintf(nfrontp, "WONT "); + goto common; + case DO: + sprintf(nfrontp, "DO "); + goto common; + case DONT: + sprintf(nfrontp, "DONT "); + common: + nfrontp += strlen(nfrontp); + if (length < 3) { + sprintf(nfrontp, "(no option??\?)"); + nfrontp += strlen(nfrontp); + break; + } + switch (pointer[2]) { + case LM_FORWARDMASK: + sprintf(nfrontp, "Forward Mask"); + nfrontp += strlen(nfrontp); + for (i = 3; i < length; i++) { + sprintf(nfrontp, " %x", pointer[i]); + nfrontp += strlen(nfrontp); + } + break; + default: + sprintf(nfrontp, "%d (unknown)", pointer[2]); + nfrontp += strlen(nfrontp); + for (i = 3; i < length; i++) { + sprintf(nfrontp, " %d", pointer[i]); + nfrontp += strlen(nfrontp); + } + break; + } + break; + + case LM_SLC: + sprintf(nfrontp, "SLC"); + nfrontp += strlen(nfrontp); + for (i = 2; i < length - 2; i += 3) { + if (SLC_NAME_OK(pointer[i+SLC_FUNC])) + sprintf(nfrontp, " %s", SLC_NAME(pointer[i+SLC_FUNC])); + else + sprintf(nfrontp, " %d", pointer[i+SLC_FUNC]); + nfrontp += strlen(nfrontp); + switch (pointer[i+SLC_FLAGS]&SLC_LEVELBITS) { + case SLC_NOSUPPORT: + sprintf(nfrontp, " NOSUPPORT"); break; + case SLC_CANTCHANGE: + sprintf(nfrontp, " CANTCHANGE"); break; + case SLC_VARIABLE: + sprintf(nfrontp, " VARIABLE"); break; + case SLC_DEFAULT: + sprintf(nfrontp, " DEFAULT"); break; + } + nfrontp += strlen(nfrontp); + sprintf(nfrontp, "%s%s%s", + pointer[i+SLC_FLAGS]&SLC_ACK ? "|ACK" : "", + pointer[i+SLC_FLAGS]&SLC_FLUSHIN ? "|FLUSHIN" : "", + pointer[i+SLC_FLAGS]&SLC_FLUSHOUT ? "|FLUSHOUT" : ""); + nfrontp += strlen(nfrontp); + if (pointer[i+SLC_FLAGS]& ~(SLC_ACK|SLC_FLUSHIN| + SLC_FLUSHOUT| SLC_LEVELBITS)) { + sprintf(nfrontp, "(0x%x)", pointer[i+SLC_FLAGS]); + nfrontp += strlen(nfrontp); + } + sprintf(nfrontp, " %d;", pointer[i+SLC_VALUE]); + nfrontp += strlen(nfrontp); + if ((pointer[i+SLC_VALUE] == IAC) && + (pointer[i+SLC_VALUE+1] == IAC)) + i++; + } + for (; i < length; i++) { + sprintf(nfrontp, " ?%d?", pointer[i]); + nfrontp += strlen(nfrontp); + } + break; + + case LM_MODE: + sprintf(nfrontp, "MODE "); + nfrontp += strlen(nfrontp); + if (length < 3) { + sprintf(nfrontp, "(no mode??\?)"); + nfrontp += strlen(nfrontp); + break; + } + { + char tbuf[32]; + sprintf(tbuf, "%s%s%s%s%s", + pointer[2]&MODE_EDIT ? "|EDIT" : "", + pointer[2]&MODE_TRAPSIG ? "|TRAPSIG" : "", + pointer[2]&MODE_SOFT_TAB ? "|SOFT_TAB" : "", + pointer[2]&MODE_LIT_ECHO ? "|LIT_ECHO" : "", + pointer[2]&MODE_ACK ? "|ACK" : ""); + sprintf(nfrontp, "%s", tbuf[1] ? &tbuf[1] : "0"); + nfrontp += strlen(nfrontp); + } + if (pointer[2]&~(MODE_EDIT|MODE_TRAPSIG|MODE_ACK)) { + sprintf(nfrontp, " (0x%x)", pointer[2]); + nfrontp += strlen(nfrontp); + } + for (i = 3; i < length; i++) { + sprintf(nfrontp, " ?0x%x?", pointer[i]); + nfrontp += strlen(nfrontp); + } + break; + default: + sprintf(nfrontp, "%d (unknown)", pointer[1]); + nfrontp += strlen(nfrontp); + for (i = 2; i < length; i++) { + sprintf(nfrontp, " %d", pointer[i]); + nfrontp += strlen(nfrontp); + } + } + break; + + case TELOPT_STATUS: { + register char *cp; + register int j, k; + + sprintf(nfrontp, "STATUS"); + nfrontp += strlen(nfrontp); + + switch (pointer[1]) { + default: + if (pointer[1] == TELQUAL_SEND) + sprintf(nfrontp, " SEND"); + else + sprintf(nfrontp, " %d (unknown)", pointer[1]); + nfrontp += strlen(nfrontp); + for (i = 2; i < length; i++) { + sprintf(nfrontp, " ?%d?", pointer[i]); + nfrontp += strlen(nfrontp); + } + break; + case TELQUAL_IS: + sprintf(nfrontp, " IS\r\n"); + nfrontp += strlen(nfrontp); + + for (i = 2; i < length; i++) { + switch(pointer[i]) { + case DO: cp = "DO"; goto common2; + case DONT: cp = "DONT"; goto common2; + case WILL: cp = "WILL"; goto common2; + case WONT: cp = "WONT"; goto common2; + common2: + i++; + if (TELOPT_OK(pointer[i])) + sprintf(nfrontp, " %s %s", cp, TELOPT(pointer[i])); + else + sprintf(nfrontp, " %s %d", cp, pointer[i]); + nfrontp += strlen(nfrontp); + + sprintf(nfrontp, "\r\n"); + nfrontp += strlen(nfrontp); + break; + + case SB: + sprintf(nfrontp, " SB "); + nfrontp += strlen(nfrontp); + i++; + j = k = i; + while (j < length) { + if (pointer[j] == SE) { + if (j+1 == length) + break; + if (pointer[j+1] == SE) + j++; + else + break; + } + pointer[k++] = pointer[j++]; + } + printsub(0, &pointer[i], k - i); + if (i < length) { + sprintf(nfrontp, " SE"); + nfrontp += strlen(nfrontp); + i = j; + } else + i = j - 1; + + sprintf(nfrontp, "\r\n"); + nfrontp += strlen(nfrontp); + + break; + + default: + sprintf(nfrontp, " %d", pointer[i]); + nfrontp += strlen(nfrontp); + break; + } + } + break; + } + break; + } + + case TELOPT_XDISPLOC: + sprintf(nfrontp, "X-DISPLAY-LOCATION "); + nfrontp += strlen(nfrontp); + switch (pointer[1]) { + case TELQUAL_IS: + sprintf(nfrontp, "IS \"%.*s\"", length-2, (char *)pointer+2); + break; + case TELQUAL_SEND: + sprintf(nfrontp, "SEND"); + break; + default: + sprintf(nfrontp, "- unknown qualifier %d (0x%x).", + pointer[1], pointer[1]); + } + nfrontp += strlen(nfrontp); + break; + + case TELOPT_NEW_ENVIRON: + sprintf(nfrontp, "NEW-ENVIRON "); + goto env_common1; + case TELOPT_OLD_ENVIRON: + sprintf(nfrontp, "OLD-ENVIRON"); + env_common1: + nfrontp += strlen(nfrontp); + switch (pointer[1]) { + case TELQUAL_IS: + sprintf(nfrontp, "IS "); + goto env_common; + case TELQUAL_SEND: + sprintf(nfrontp, "SEND "); + goto env_common; + case TELQUAL_INFO: + sprintf(nfrontp, "INFO "); + env_common: + nfrontp += strlen(nfrontp); + { + register int noquote = 2; + for (i = 2; i < length; i++ ) { + switch (pointer[i]) { + case NEW_ENV_VAR: + sprintf(nfrontp, "\" VAR " + noquote); + nfrontp += strlen(nfrontp); + noquote = 2; + break; + + case NEW_ENV_VALUE: + sprintf(nfrontp, "\" VALUE " + noquote); + nfrontp += strlen(nfrontp); + noquote = 2; + break; + + case ENV_ESC: + sprintf(nfrontp, "\" ESC " + noquote); + nfrontp += strlen(nfrontp); + noquote = 2; + break; + + case ENV_USERVAR: + sprintf(nfrontp, "\" USERVAR " + noquote); + nfrontp += strlen(nfrontp); + noquote = 2; + break; + + default: + def_case: + if (isprint(pointer[i]) && pointer[i] != '"') { + if (noquote) { + *nfrontp++ = '"'; + noquote = 0; + } + *nfrontp++ = pointer[i]; + } else { + sprintf(nfrontp, "\" %03o " + noquote, + pointer[i]); + nfrontp += strlen(nfrontp); + noquote = 2; + } + break; + } + } + if (!noquote) + *nfrontp++ = '"'; + break; + } + } + break; + +#if defined(AUTHENTICATION) + case TELOPT_AUTHENTICATION: + sprintf(nfrontp, "AUTHENTICATION"); + nfrontp += strlen(nfrontp); + + if (length < 2) { + sprintf(nfrontp, " (empty suboption??\?)"); + nfrontp += strlen(nfrontp); + break; + } + switch (pointer[1]) { + case TELQUAL_REPLY: + case TELQUAL_IS: + sprintf(nfrontp, " %s ", (pointer[1] == TELQUAL_IS) ? + "IS" : "REPLY"); + nfrontp += strlen(nfrontp); + if (AUTHTYPE_NAME_OK(pointer[2])) + sprintf(nfrontp, "%s ", AUTHTYPE_NAME(pointer[2])); + else + sprintf(nfrontp, "%d ", pointer[2]); + nfrontp += strlen(nfrontp); + if (length < 3) { + sprintf(nfrontp, "(partial suboption??\?)"); + nfrontp += strlen(nfrontp); + break; + } + sprintf(nfrontp, "%s|%s", + ((pointer[3] & AUTH_WHO_MASK) == AUTH_WHO_CLIENT) ? + "CLIENT" : "SERVER", + ((pointer[3] & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) ? + "MUTUAL" : "ONE-WAY"); + nfrontp += strlen(nfrontp); + + auth_printsub(&pointer[1], length - 1, buf, sizeof(buf)); + sprintf(nfrontp, "%s", buf); + nfrontp += strlen(nfrontp); + break; + + case TELQUAL_SEND: + i = 2; + sprintf(nfrontp, " SEND "); + nfrontp += strlen(nfrontp); + while (i < length) { + if (AUTHTYPE_NAME_OK(pointer[i])) + sprintf(nfrontp, "%s ", AUTHTYPE_NAME(pointer[i])); + else + sprintf(nfrontp, "%d ", pointer[i]); + nfrontp += strlen(nfrontp); + if (++i >= length) { + sprintf(nfrontp, "(partial suboption??\?)"); + nfrontp += strlen(nfrontp); + break; + } + sprintf(nfrontp, "%s|%s ", + ((pointer[i] & AUTH_WHO_MASK) == AUTH_WHO_CLIENT) ? + "CLIENT" : "SERVER", + ((pointer[i] & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) ? + "MUTUAL" : "ONE-WAY"); + nfrontp += strlen(nfrontp); + ++i; + } + break; + + case TELQUAL_NAME: + i = 2; + sprintf(nfrontp, " NAME \""); + nfrontp += strlen(nfrontp); + while (i < length) + *nfrontp += pointer[i++]; + *nfrontp += '"'; + break; + + default: + for (i = 2; i < length; i++) { + sprintf(nfrontp, " ?%d?", pointer[i]); + nfrontp += strlen(nfrontp); + } + break; + } + break; +#endif + +#ifdef ENCRYPTION + case TELOPT_ENCRYPT: + sprintf(nfrontp, "ENCRYPT"); + nfrontp += strlen(nfrontp); + if (length < 2) { + sprintf(nfrontp, " (empty suboption??\?)"); + nfrontp += strlen(nfrontp); + break; + } + switch (pointer[1]) { + case ENCRYPT_START: + sprintf(nfrontp, " START"); + nfrontp += strlen(nfrontp); + break; + + case ENCRYPT_END: + sprintf(nfrontp, " END"); + nfrontp += strlen(nfrontp); + break; + + case ENCRYPT_REQSTART: + sprintf(nfrontp, " REQUEST-START"); + nfrontp += strlen(nfrontp); + break; + + case ENCRYPT_REQEND: + sprintf(nfrontp, " REQUEST-END"); + nfrontp += strlen(nfrontp); + break; + + case ENCRYPT_IS: + case ENCRYPT_REPLY: + sprintf(nfrontp, " %s ", (pointer[1] == ENCRYPT_IS) ? + "IS" : "REPLY"); + nfrontp += strlen(nfrontp); + if (length < 3) { + sprintf(nfrontp, " (partial suboption??\?)"); + nfrontp += strlen(nfrontp); + break; + } + if (ENCTYPE_NAME_OK(pointer[2])) + sprintf(nfrontp, "%s ", ENCTYPE_NAME(pointer[2])); + else + sprintf(nfrontp, " %d (unknown)", pointer[2]); + nfrontp += strlen(nfrontp); + + encrypt_printsub(&pointer[1], length - 1, buf, sizeof(buf)); + sprintf(nfrontp, "%s", buf); + nfrontp += strlen(nfrontp); + break; + + case ENCRYPT_SUPPORT: + i = 2; + sprintf(nfrontp, " SUPPORT "); + nfrontp += strlen(nfrontp); + while (i < length) { + if (ENCTYPE_NAME_OK(pointer[i])) + sprintf(nfrontp, "%s ", ENCTYPE_NAME(pointer[i])); + else + sprintf(nfrontp, "%d ", pointer[i]); + nfrontp += strlen(nfrontp); + i++; + } + break; + + case ENCRYPT_ENC_KEYID: + sprintf(nfrontp, " ENC_KEYID", pointer[1]); + nfrontp += strlen(nfrontp); + goto encommon; + + case ENCRYPT_DEC_KEYID: + sprintf(nfrontp, " DEC_KEYID", pointer[1]); + nfrontp += strlen(nfrontp); + goto encommon; + + default: + sprintf(nfrontp, " %d (unknown)", pointer[1]); + nfrontp += strlen(nfrontp); + encommon: + for (i = 2; i < length; i++) { + sprintf(nfrontp, " %d", pointer[i]); + nfrontp += strlen(nfrontp); + } + break; + } + break; +#endif /* ENCRYPTION */ + + default: + if (TELOPT_OK(pointer[0])) + sprintf(nfrontp, "%s (unknown)", TELOPT(pointer[0])); + else + sprintf(nfrontp, "%d (unknown)", pointer[i]); + nfrontp += strlen(nfrontp); + for (i = 1; i < length; i++) { + sprintf(nfrontp, " %d", pointer[i]); + nfrontp += strlen(nfrontp); + } + break; + } + sprintf(nfrontp, "\r\n"); + nfrontp += strlen(nfrontp); +} + +/* + * Dump a data buffer in hex and ascii to the output data stream. + */ + void +printdata(tag, ptr, cnt) + register char *tag; + register char *ptr; + register int cnt; +{ + register int i; + char xbuf[30]; + + while (cnt) { + /* flush net output buffer if no room for new data) */ + if ((&netobuf[BUFSIZ] - nfrontp) < 80) { + netflush(); + } + + /* add a line of output */ + sprintf(nfrontp, "%s: ", tag); + nfrontp += strlen(nfrontp); + for (i = 0; i < 20 && cnt; i++) { + sprintf(nfrontp, "%02x", *ptr); + nfrontp += strlen(nfrontp); + if (isprint(*ptr)) { + xbuf[i] = *ptr; + } else { + xbuf[i] = '.'; + } + if (i % 2) { + *nfrontp = ' '; + nfrontp++; + } + cnt--; + ptr++; + } + xbuf[i] = '\0'; + sprintf(nfrontp, " %s\r\n", xbuf ); + nfrontp += strlen(nfrontp); + } +} +#endif /* DIAGNOSTICS */