diff options
Diffstat (limited to 'secure/usr.bin/telnet/sys_bsd.c')
-rw-r--r-- | secure/usr.bin/telnet/sys_bsd.c | 1220 |
1 files changed, 0 insertions, 1220 deletions
diff --git a/secure/usr.bin/telnet/sys_bsd.c b/secure/usr.bin/telnet/sys_bsd.c deleted file mode 100644 index 3ede7c4..0000000 --- a/secure/usr.bin/telnet/sys_bsd.c +++ /dev/null @@ -1,1220 +0,0 @@ -/* - * 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 <fcntl.h> -#include <sys/types.h> -#include <sys/time.h> -#include <sys/socket.h> -#include <signal.h> -#include <errno.h> -#include <arpa/telnet.h> - -#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) - 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; -} |