mirror of
https://github.com/sheumann/telnetd.git
synced 2024-05-28 19:41:28 +00:00
9de6e7ba10
to do what they are supposed to: under some circumstances output data would be truncated, or the buffer would not actually be flushed (possibly leading to overflows when the caller assumes the operation succeeded). Change the semantics so that these functions ensure they complete the operation before returning. Comment out diagnostic code enabled by '-D reports' which causes an infinite recursion and an eventual crash. Patch developed with assistance from ru and assar. git-svn-id: http://svn0.us-east.freebsd.org/base/head/contrib/telnet@80224 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
246 lines
7.0 KiB
C
246 lines
7.0 KiB
C
/*
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)ext.h 8.2 (Berkeley) 12/15/93
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* $FreeBSD$
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*/
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/*
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* Telnet server variable declarations
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*/
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extern char options[256];
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extern char do_dont_resp[256];
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extern char will_wont_resp[256];
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extern int linemode; /* linemode on/off */
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#ifdef LINEMODE
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extern int uselinemode; /* what linemode to use (on/off) */
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extern int editmode; /* edit modes in use */
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extern int useeditmode; /* edit modes to use */
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extern int alwayslinemode; /* command line option */
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extern int lmodetype; /* Client support for linemode */
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#endif /* LINEMODE */
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extern int flowmode; /* current flow control state */
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extern int restartany; /* restart output on any character state */
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#ifdef DIAGNOSTICS
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extern int diagnostic; /* telnet diagnostic capabilities */
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#endif /* DIAGNOSTICS */
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#ifdef BFTPDAEMON
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extern int bftpd; /* behave as bftp daemon */
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#endif /* BFTPDAEMON */
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#if defined(SecurID)
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extern int require_SecurID;
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#endif
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#if defined(AUTHENTICATION)
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extern int auth_level;
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#endif
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extern slcfun slctab[NSLC + 1]; /* slc mapping table */
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char *terminaltype;
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/*
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* I/O data buffers, pointers, and counters.
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*/
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extern char ptyobuf[BUFSIZ+NETSLOP], *pfrontp, *pbackp;
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extern char netibuf[BUFSIZ], *netip;
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extern char netobuf[BUFSIZ], *nfrontp, *nbackp;
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extern char *neturg; /* one past last bye of urgent data */
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extern int pcc, ncc;
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#if defined(CRAY2) && defined(UNICOS5)
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extern int unpcc; /* characters left unprocessed by CRAY-2 terminal routine */
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extern char *unptyip; /* pointer to remaining characters in buffer */
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#endif
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extern int pty, net;
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extern char *line;
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extern int SYNCHing; /* we are in TELNET SYNCH mode */
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#ifndef P
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# ifdef __STDC__
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# define P(x) x
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# else
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# define P(x) ()
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# endif
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#endif
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extern void
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_termstat P((void)),
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add_slc P((int, int, int)),
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check_slc P((void)),
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change_slc P((int, int, int)),
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cleanup P((int)),
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clientstat P((int, int, int)),
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copy_termbuf P((char *, int)),
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deferslc P((void)),
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defer_terminit P((void)),
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do_opt_slc P((unsigned char *, int)),
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doeof P((void)),
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dooption P((int)),
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dontoption P((int)),
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edithost P((char *, char *)),
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fatal P((int, char *)),
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fatalperror P((int, char *)),
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get_slc_defaults P((void)),
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init_env P((void)),
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init_termbuf P((void)),
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interrupt P((void)),
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localstat P((void)),
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flowstat P((void)),
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netclear P((void)),
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netflush P((void)),
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#ifdef DIAGNOSTICS
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printoption P((char *, int)),
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printdata P((char *, char *, int)),
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printsub P((int, unsigned char *, int)),
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#endif
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ptyflush P((void)),
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putchr P((int)),
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putf P((char *, char *)),
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recv_ayt P((void)),
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send_do P((int, int)),
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send_dont P((int, int)),
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send_slc P((void)),
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send_status P((void)),
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send_will P((int, int)),
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send_wont P((int, int)),
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sendbrk P((void)),
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sendsusp P((void)),
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set_termbuf P((void)),
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start_login P((char *, int, char *)),
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start_slc P((int)),
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#if defined(AUTHENTICATION)
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start_slave P((char *)),
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#else
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start_slave P((char *, int, char *)),
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#endif
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suboption P((void)),
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telrcv P((void)),
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ttloop P((void)),
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tty_binaryin P((int)),
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tty_binaryout P((int));
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extern int
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end_slc P((unsigned char **)),
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getnpty P((void)),
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#ifndef convex
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getpty P((int *)),
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#endif
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login_tty P((int)),
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spcset P((int, cc_t *, cc_t **)),
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stilloob P((int)),
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terminit P((void)),
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termstat P((void)),
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tty_flowmode P((void)),
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tty_restartany P((void)),
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tty_isbinaryin P((void)),
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tty_isbinaryout P((void)),
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tty_iscrnl P((void)),
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tty_isecho P((void)),
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tty_isediting P((void)),
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tty_islitecho P((void)),
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tty_isnewmap P((void)),
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tty_israw P((void)),
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tty_issofttab P((void)),
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tty_istrapsig P((void)),
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tty_linemode P((void));
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extern void
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tty_rspeed P((int)),
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tty_setecho P((int)),
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tty_setedit P((int)),
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tty_setlinemode P((int)),
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tty_setlitecho P((int)),
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tty_setsig P((int)),
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tty_setsofttab P((int)),
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tty_tspeed P((int)),
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willoption P((int)),
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wontoption P((int));
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int output_data __P((const char *, ...)) __printflike(1, 2);
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void output_datalen __P((const char *, int));
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#ifdef ENCRYPTION
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extern void (*encrypt_output) P((unsigned char *, int));
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extern int (*decrypt_input) P((int));
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extern char *nclearto;
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#endif /* ENCRYPTION */
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/*
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* The following are some clocks used to decide how to interpret
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* the relationship between various variables.
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*/
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extern struct {
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int
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system, /* what the current time is */
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echotoggle, /* last time user entered echo character */
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modenegotiated, /* last time operating mode negotiated */
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didnetreceive, /* last time we read data from network */
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ttypesubopt, /* ttype subopt is received */
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tspeedsubopt, /* tspeed subopt is received */
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environsubopt, /* environ subopt is received */
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oenvironsubopt, /* old environ subopt is received */
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xdisplocsubopt, /* xdisploc subopt is received */
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baseline, /* time started to do timed action */
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gotDM; /* when did we last see a data mark */
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} clocks;
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#if defined(CRAY2) && defined(UNICOS5)
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extern int needtermstat;
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#endif
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#ifndef DEFAULT_IM
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# ifdef CRAY
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# define DEFAULT_IM "\r\n\r\nCray UNICOS (%h) (%t)\r\n\r\r\n\r"
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# else
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# ifdef sun
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# define DEFAULT_IM "\r\n\r\nSunOS UNIX (%h) (%t)\r\n\r\r\n\r"
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# else
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# ifdef ultrix
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# define DEFAULT_IM "\r\n\r\nULTRIX (%h) (%t)\r\n\r\r\n\r"
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# else
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# ifdef __FreeBSD__
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# define DEFAULT_IM "\r\n\r\nFreeBSD (%h) (%t)\r\n\r\r\n\r"
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# else
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# define DEFAULT_IM "\r\n\r\n4.4 BSD UNIX (%h) (%t)\r\n\r\r\n\r"
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# endif
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# endif
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# endif
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# endif
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#endif
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