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https://github.com/sheumann/telnetd.git
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90a2e082b9
git-svn-id: http://svn0.us-east.freebsd.org/base/head/contrib/telnet@114630 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
1146 lines
24 KiB
C
1146 lines
24 KiB
C
/*
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* Copyright (c) 1988, 1990, 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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#if 0
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#ifndef lint
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static const char sccsid[] = "@(#)sys_bsd.c 8.4 (Berkeley) 5/30/95";
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#endif
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* The following routines try to encapsulate what is system dependent
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* (at least between 4.x and dos) which is used in telnet.c.
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*/
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <sys/time.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <arpa/telnet.h>
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#include "ring.h"
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#include "fdset.h"
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#include "defines.h"
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#include "externs.h"
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#include "types.h"
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int
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tout, /* Output file descriptor */
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tin, /* Input file descriptor */
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net;
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#ifndef USE_TERMIO
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struct tchars otc = { 0 }, ntc = { 0 };
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struct ltchars oltc = { 0 }, nltc = { 0 };
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struct sgttyb ottyb = { 0 }, nttyb = { 0 };
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int olmode = 0;
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# define cfgetispeed(ptr) (ptr)->sg_ispeed
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# define cfgetospeed(ptr) (ptr)->sg_ospeed
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# define old_tc ottyb
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#else /* USE_TERMIO */
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struct termio old_tc = { 0, 0, 0, 0, {}, 0, 0 };
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# ifndef TCSANOW
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# ifdef TCSETS
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# define TCSANOW TCSETS
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# define TCSADRAIN TCSETSW
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# define tcgetattr(f, t) ioctl(f, TCGETS, (char *)t)
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# else
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# ifdef TCSETA
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# define TCSANOW TCSETA
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# define TCSADRAIN TCSETAW
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# define tcgetattr(f, t) ioctl(f, TCGETA, (char *)t)
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# else
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# define TCSANOW TIOCSETA
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# define TCSADRAIN TIOCSETAW
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# define tcgetattr(f, t) ioctl(f, TIOCGETA, (char *)t)
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# endif
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# endif
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# define tcsetattr(f, a, t) ioctl(f, a, (char *)t)
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# define cfgetospeed(ptr) ((ptr)->c_cflag&CBAUD)
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# ifdef CIBAUD
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# define cfgetispeed(ptr) (((ptr)->c_cflag&CIBAUD) >> IBSHIFT)
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# else
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# define cfgetispeed(ptr) cfgetospeed(ptr)
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# endif
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# endif /* TCSANOW */
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# ifdef sysV88
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# define TIOCFLUSH TC_PX_DRAIN
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# endif
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#endif /* USE_TERMIO */
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static fd_set *ibitsp, *obitsp, *xbitsp;
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int fdsn;
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#ifdef SIGINT
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static SIG_FUNC_RET intr(int);
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#endif /* SIGINT */
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#ifdef SIGQUIT
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static SIG_FUNC_RET intr2(int);
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#endif /* SIGQUIT */
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#ifdef SIGTSTP
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static SIG_FUNC_RET susp(int);
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#endif /* SIGTSTP */
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#ifdef SIGINFO
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static SIG_FUNC_RET ayt(int);
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#endif
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void
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init_sys(void)
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{
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tout = fileno(stdout);
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tin = fileno(stdin);
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errno = 0;
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}
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int
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TerminalWrite(char *buf, int n)
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{
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return write(tout, buf, n);
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}
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int
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TerminalRead(char *buf, int n)
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{
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return read(tin, buf, n);
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}
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/*
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*
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*/
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int
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TerminalAutoFlush(void)
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{
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#if defined(LNOFLSH)
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int flush;
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ioctl(0, TIOCLGET, (char *)&flush);
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return !(flush&LNOFLSH); /* if LNOFLSH, no autoflush */
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#else /* LNOFLSH */
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return 1;
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#endif /* LNOFLSH */
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}
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#ifdef KLUDGELINEMODE
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extern int kludgelinemode;
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#endif
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/*
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* TerminalSpecialChars()
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*
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* Look at an input character to see if it is a special character
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* and decide what to do.
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*
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* Output:
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*
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* 0 Don't add this character.
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* 1 Do add this character
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*/
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int
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TerminalSpecialChars(int c)
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{
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if (c == termIntChar) {
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intp();
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return 0;
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} else if (c == termQuitChar) {
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#ifdef KLUDGELINEMODE
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if (kludgelinemode)
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sendbrk();
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else
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#endif
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sendabort();
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return 0;
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} else if (c == termEofChar) {
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if (my_want_state_is_will(TELOPT_LINEMODE)) {
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sendeof();
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return 0;
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}
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return 1;
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} else if (c == termSuspChar) {
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sendsusp();
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return(0);
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} else if (c == termFlushChar) {
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xmitAO(); /* Transmit Abort Output */
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return 0;
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} else if (!MODE_LOCAL_CHARS(globalmode)) {
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if (c == termKillChar) {
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xmitEL();
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return 0;
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} else if (c == termEraseChar) {
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xmitEC(); /* Transmit Erase Character */
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return 0;
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}
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}
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return 1;
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}
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/*
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* Flush output to the terminal
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*/
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void
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TerminalFlushOutput(void)
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{
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#ifdef TIOCFLUSH
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(void) ioctl(fileno(stdout), TIOCFLUSH, (char *) 0);
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#else
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(void) ioctl(fileno(stdout), TCFLSH, (char *) 0);
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#endif
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}
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void
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TerminalSaveState(void)
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{
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#ifndef USE_TERMIO
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ioctl(0, TIOCGETP, (char *)&ottyb);
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ioctl(0, TIOCGETC, (char *)&otc);
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ioctl(0, TIOCGLTC, (char *)&oltc);
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ioctl(0, TIOCLGET, (char *)&olmode);
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ntc = otc;
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nltc = oltc;
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nttyb = ottyb;
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#else /* USE_TERMIO */
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tcgetattr(0, &old_tc);
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new_tc = old_tc;
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#ifndef VDISCARD
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termFlushChar = CONTROL('O');
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#endif
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#ifndef VWERASE
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termWerasChar = CONTROL('W');
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#endif
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#ifndef VREPRINT
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termRprntChar = CONTROL('R');
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#endif
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#ifndef VLNEXT
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termLiteralNextChar = CONTROL('V');
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#endif
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#ifndef VSTART
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termStartChar = CONTROL('Q');
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#endif
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#ifndef VSTOP
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termStopChar = CONTROL('S');
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#endif
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#ifndef VSTATUS
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termAytChar = CONTROL('T');
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#endif
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#endif /* USE_TERMIO */
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}
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cc_t *
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tcval(int func)
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{
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switch(func) {
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case SLC_IP: return(&termIntChar);
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case SLC_ABORT: return(&termQuitChar);
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case SLC_EOF: return(&termEofChar);
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case SLC_EC: return(&termEraseChar);
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case SLC_EL: return(&termKillChar);
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case SLC_XON: return(&termStartChar);
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case SLC_XOFF: return(&termStopChar);
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case SLC_FORW1: return(&termForw1Char);
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#ifdef USE_TERMIO
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case SLC_FORW2: return(&termForw2Char);
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# ifdef VDISCARD
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case SLC_AO: return(&termFlushChar);
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# endif
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# ifdef VSUSP
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case SLC_SUSP: return(&termSuspChar);
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# endif
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# ifdef VWERASE
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case SLC_EW: return(&termWerasChar);
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# endif
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# ifdef VREPRINT
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case SLC_RP: return(&termRprntChar);
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# endif
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# ifdef VLNEXT
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case SLC_LNEXT: return(&termLiteralNextChar);
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# endif
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# ifdef VSTATUS
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case SLC_AYT: return(&termAytChar);
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# endif
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#endif
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case SLC_SYNCH:
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case SLC_BRK:
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case SLC_EOR:
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default:
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return((cc_t *)0);
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}
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}
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void
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TerminalDefaultChars(void)
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{
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#ifndef USE_TERMIO
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ntc = otc;
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nltc = oltc;
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nttyb.sg_kill = ottyb.sg_kill;
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nttyb.sg_erase = ottyb.sg_erase;
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#else /* USE_TERMIO */
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memcpy(new_tc.c_cc, old_tc.c_cc, sizeof(old_tc.c_cc));
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# ifndef VDISCARD
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termFlushChar = CONTROL('O');
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# endif
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# ifndef VWERASE
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termWerasChar = CONTROL('W');
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# endif
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# ifndef VREPRINT
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termRprntChar = CONTROL('R');
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# endif
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# ifndef VLNEXT
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termLiteralNextChar = CONTROL('V');
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# endif
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# ifndef VSTART
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termStartChar = CONTROL('Q');
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# endif
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# ifndef VSTOP
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termStopChar = CONTROL('S');
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# endif
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# ifndef VSTATUS
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termAytChar = CONTROL('T');
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# endif
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#endif /* USE_TERMIO */
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}
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/*
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* TerminalNewMode - set up terminal to a specific mode.
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* MODE_ECHO: do local terminal echo
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* MODE_FLOW: do local flow control
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* MODE_TRAPSIG: do local mapping to TELNET IAC sequences
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* MODE_EDIT: do local line editing
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*
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* Command mode:
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* MODE_ECHO|MODE_EDIT|MODE_FLOW|MODE_TRAPSIG
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* local echo
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* local editing
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* local xon/xoff
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* local signal mapping
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*
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* Linemode:
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* local/no editing
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* Both Linemode and Single Character mode:
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* local/remote echo
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* local/no xon/xoff
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* local/no signal mapping
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*/
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|
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void
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TerminalNewMode(int f)
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{
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static int prevmode = 0;
|
||
#ifndef USE_TERMIO
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struct tchars tc;
|
||
struct ltchars ltc;
|
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struct sgttyb sb;
|
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int lmode;
|
||
#else /* USE_TERMIO */
|
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struct termio tmp_tc;
|
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#endif /* USE_TERMIO */
|
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int onoff;
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int old;
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cc_t esc;
|
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|
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globalmode = f&~MODE_FORCE;
|
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if (prevmode == f)
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return;
|
||
|
||
/*
|
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* 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
|
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* 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
|
||
*/
|
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old = ttyflush(SYNCHing|flushout);
|
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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;
|
||
#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 SIGINT
|
||
(void) signal(SIGINT, intr);
|
||
#endif
|
||
#ifdef SIGQUIT
|
||
(void) signal(SIGQUIT, intr2);
|
||
#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
|
||
(void) signal(SIGINFO, (void (*)(int))ayt_status);
|
||
#endif
|
||
#ifdef SIGINT
|
||
(void) signal(SIGINT, SIG_DFL);
|
||
#endif
|
||
#ifdef SIGQUIT
|
||
(void) signal(SIGQUIT, SIG_DFL);
|
||
#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
|
||
|
||
ioctl(tin, FIONBIO, (char *)&onoff);
|
||
ioctl(tout, FIONBIO, (char *)&onoff);
|
||
|
||
}
|
||
|
||
/*
|
||
* 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(long *ispeed, long *ospeed)
|
||
{
|
||
#ifdef DECODE_BAUD
|
||
struct termspeeds *tp;
|
||
#endif /* DECODE_BAUD */
|
||
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(long *rows, long *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(int fd)
|
||
{
|
||
return close(fd);
|
||
}
|
||
|
||
static void
|
||
NetNonblockingIO(int fd, int onoff)
|
||
{
|
||
ioctl(fd, FIONBIO, (char *)&onoff);
|
||
}
|
||
|
||
|
||
/*
|
||
* Various signal handling routines.
|
||
*/
|
||
|
||
/* ARGSUSED */
|
||
static SIG_FUNC_RET
|
||
deadpeer(int sig __unused)
|
||
{
|
||
setcommandmode();
|
||
longjmp(peerdied, -1);
|
||
}
|
||
|
||
/* ARGSUSED */
|
||
SIG_FUNC_RET
|
||
intr(int sig __unused)
|
||
{
|
||
if (localchars) {
|
||
intp();
|
||
return;
|
||
}
|
||
setcommandmode();
|
||
longjmp(toplevel, -1);
|
||
}
|
||
|
||
/* ARGSUSED */
|
||
SIG_FUNC_RET
|
||
intr2(int sig __unused)
|
||
{
|
||
if (localchars) {
|
||
#ifdef KLUDGELINEMODE
|
||
if (kludgelinemode)
|
||
sendbrk();
|
||
else
|
||
#endif
|
||
sendabort();
|
||
return;
|
||
}
|
||
}
|
||
|
||
#ifdef SIGTSTP
|
||
/* ARGSUSED */
|
||
SIG_FUNC_RET
|
||
susp(int sig __unused)
|
||
{
|
||
if ((rlogin != _POSIX_VDISABLE) && rlogin_susp())
|
||
return;
|
||
if (localchars)
|
||
sendsusp();
|
||
}
|
||
#endif
|
||
|
||
#ifdef SIGWINCH
|
||
/* ARGSUSED */
|
||
static SIG_FUNC_RET
|
||
sendwin(int sig __unused)
|
||
{
|
||
if (connected) {
|
||
sendnaws();
|
||
}
|
||
}
|
||
#endif
|
||
|
||
#ifdef SIGINFO
|
||
/* ARGSUSED */
|
||
SIG_FUNC_RET
|
||
ayt(int sig __unused)
|
||
{
|
||
if (connected)
|
||
sendayt();
|
||
else
|
||
ayt_status();
|
||
}
|
||
#endif
|
||
|
||
|
||
void
|
||
sys_telnet_init(void)
|
||
{
|
||
(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(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(int netin, int netout, int netex, int ttyin, int ttyout, int poll)
|
||
{
|
||
int c;
|
||
int returnValue = 0;
|
||
static struct timeval TimeValue = { 0, 0 };
|
||
int maxfd = -1;
|
||
int tmp;
|
||
|
||
if ((netout || netin || netex) && net > maxfd)
|
||
maxfd = net;
|
||
|
||
if (ttyout && tout > maxfd)
|
||
maxfd = tout;
|
||
if (ttyin && tin > maxfd)
|
||
maxfd = tin;
|
||
tmp = howmany(maxfd+1, NFDBITS) * sizeof(fd_mask);
|
||
if (tmp > fdsn) {
|
||
if (ibitsp)
|
||
free(ibitsp);
|
||
if (obitsp)
|
||
free(obitsp);
|
||
if (xbitsp)
|
||
free(xbitsp);
|
||
|
||
fdsn = tmp;
|
||
if ((ibitsp = (fd_set *)malloc(fdsn)) == NULL)
|
||
err(1, "malloc");
|
||
if ((obitsp = (fd_set *)malloc(fdsn)) == NULL)
|
||
err(1, "malloc");
|
||
if ((xbitsp = (fd_set *)malloc(fdsn)) == NULL)
|
||
err(1, "malloc");
|
||
memset(ibitsp, 0, fdsn);
|
||
memset(obitsp, 0, fdsn);
|
||
memset(xbitsp, 0, fdsn);
|
||
}
|
||
|
||
if (netout)
|
||
FD_SET(net, obitsp);
|
||
if (ttyout)
|
||
FD_SET(tout, obitsp);
|
||
if (ttyin)
|
||
FD_SET(tin, ibitsp);
|
||
if (netin)
|
||
FD_SET(net, ibitsp);
|
||
if (netex)
|
||
FD_SET(net, xbitsp);
|
||
if ((c = select(maxfd + 1, ibitsp, obitsp, xbitsp,
|
||
(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;
|
||
}
|
||
/* I don't like this, does it ever happen? */
|
||
printf("sleep(5) from telnet, after select: %s\r\n", strerror(errno));
|
||
sleep(5);
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
/*
|
||
* Any urgent data?
|
||
*/
|
||
if (FD_ISSET(net, xbitsp)) {
|
||
FD_CLR(net, xbitsp);
|
||
SYNCHing = 1;
|
||
(void) ttyflush(1); /* flush already enqueued data */
|
||
}
|
||
|
||
/*
|
||
* Something to read from the network...
|
||
*/
|
||
if (FD_ISSET(net, ibitsp)) {
|
||
int canread;
|
||
|
||
FD_CLR(net, ibitsp);
|
||
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, ibitsp)) {
|
||
FD_CLR(tin, ibitsp);
|
||
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, obitsp)) {
|
||
FD_CLR(net, obitsp);
|
||
returnValue |= netflush();
|
||
}
|
||
if (FD_ISSET(tout, obitsp)) {
|
||
FD_CLR(tout, obitsp);
|
||
returnValue |= (ttyflush(SYNCHing|flushout) > 0);
|
||
}
|
||
|
||
return returnValue;
|
||
}
|