diff options
Diffstat (limited to 'src/appl/telnet/telnetd/telnetd.c')
| -rw-r--r-- | src/appl/telnet/telnetd/telnetd.c | 1715 |
1 files changed, 0 insertions, 1715 deletions
diff --git a/src/appl/telnet/telnetd/telnetd.c b/src/appl/telnet/telnetd/telnetd.c deleted file mode 100644 index 86280f3dcd..0000000000 --- a/src/appl/telnet/telnetd/telnetd.c +++ /dev/null @@ -1,1715 +0,0 @@ -/* - * 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 */ - -/* based on @(#)telnetd.c 8.1 (Berkeley) 6/4/93 */ - -#include "telnetd.h" -#include "pathnames.h" - -extern int getent(char *, char *); -extern int tgetent(char *, char *); - -#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 - -#include <stdio.h> -#include <unistd.h> -#include <stdlib.h> -#include <libpty.h> -#include <com_err.h> -#if defined(_SC_CRAY_SECURE_SYS) -#include <sys/sysv.h> -#include <sys/secdev.h> -# ifdef SO_SEC_MULTI /* 8.0 code */ -#include <sys/secparm.h> -#include <sys/usrv.h> -# 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 */ - -#include "fake-addrinfo.h" - -#ifdef KRB5 -#include "krb5.h" -#endif - -#if defined(AUTHENTICATION) -#include <libtelnet/auth.h> -#include <libtelnet/auth-proto.h> -#endif -#ifdef ENCRYPTION -#include <libtelnet/encrypt.h> -#include <libtelnet/enc-proto.h> -#endif -#if defined(AUTHENTICATION) || defined(ENCRYPTION) -#include <libtelnet/misc-proto.h> -#endif - -int registerd_host_only = 0; - -#ifdef STREAMSPTY -#include <sys/stream.h> -# include <stropts.h> -# include <termio.h> -/* make sure we don't get the bsd version */ -#ifdef HAVE_SYS_TTY_H -# include "/usr/include/sys/tty.h" -#endif -#ifdef HAVE_SYS_PTYVAR_H -# include <sys/ptyvar.h> -#endif - -/* - * 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 */ - -static void doit (struct sockaddr *); -int terminaltypeok (char *); -static void _gettermname(void); - -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; - -int maxhostlen = 0; -int always_ip = 0; -int stripdomain = 1; - -extern void usage (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', 'L', ':', 'n', 'S', ':', 'U', - 'w', ':', -#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 -#ifdef KRB5 - 'R', ':', 't', ':', -#endif - '\0' -}; - -#include <sys/utsname.h> -static char * -get_default_IM() -{ - struct utsname name; - static char banner[1024]; - - if (uname(&name) < 0) - snprintf(banner, sizeof(banner), - "\r\nError getting hostname: %s\r\n", - strerror(errno)); - else { -#if defined(_AIX) - snprintf(banner, sizeof(banner), - "\r\n %%h (%s release %s.%s) (%%t)\r\n\r\n", - name.sysname, name.version, name.release); -#else - snprintf(banner, sizeof(banner), - "\r\n %%h (%s release %s %s) (%%t)\r\n\r\n", - name.sysname, name.release, name.version); -#endif - } - return banner; -} - -int -main(argc, argv) - int argc; - char *argv[]; -{ - struct sockaddr_storage from; - int on = 1; - socklen_t 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)) != -1) { - 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 if (!strcmp(optarg, "encrypt")) { - extern int encrypt_debug_mode; - encrypt_debug_mode = 1; - } else { - usage(); - /* NOT REACHED */ - } - break; -#endif /* DIAGNOSTICS */ - -#ifdef ENCRYPTION - case 'e': - must_encrypt = 1; - 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 'L': - { - extern char *login_program; - - login_program = optarg; - 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 KRB5 - case 'R': - { - extern krb5_context telnet_context; - krb5_error_code retval; - - if (telnet_context == 0) { - retval = krb5_init_context(&telnet_context); - if (retval) { - com_err("telnetd", retval, - "while initializing krb5"); - exit(1); - } - } - krb5_set_default_realm(telnet_context, optarg); - break; - } -#endif /* KRB5 */ - -#ifdef SecurID - case 's': - /* SecurID required */ - require_SecurID = 1; - break; -#endif /* SecurID */ - case 'S': -#ifdef HAVE_GETTOSBYNAME - 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; - -#ifdef KRB5 - case 't': - { - extern char *telnet_srvtab; - - telnet_srvtab = optarg; - break; - } -#endif /* KRB5 */ - - - case 'U': - registerd_host_only = 1; - break; - -#ifdef AUTHENTICATION - case 'X': - /* - * Check for invalid authentication types - */ - auth_disable_name(optarg); - break; -#endif /* AUTHENTICATION */ - case 'w': - if (!strcmp(optarg, "ip")) - always_ip = 1; - else { - char *cp; - cp = strchr(optarg, ','); - if (cp == NULL) - maxhostlen = atoi(optarg); - else if (*(++cp)) { - if (!strcmp(cp, "striplocal")) - stripdomain = 1; - else if (!strcmp(cp, "nostriplocal")) - stripdomain = 0; - else { - usage(); - } - *(--cp) = '\0'; - maxhostlen = atoi(optarg); - } - } - break; - default: - fprintf(stderr, "telnetd: %c: unknown option\n", ch); - /* FALLTHROUGH */ - case '?': - usage(); - /* NOTREACHED */ - } - } - - argc -= optind; - argv += optind; - - /* XXX Convert this to support getaddrinfo, ipv6, etc. */ - if (debug) { - int s, ns; - socklen_t foo; - struct servent *sp; - static struct sockaddr_in sin4 = { AF_INET }; - - if (argc > 1) { - usage(); - /* NOT REACHED */ - } else if (argc == 1) { - if ((sp = getservbyname(*argv, "tcp"))) { - sin4.sin_port = sp->s_port; - } else { - sin4.sin_port = atoi(*argv); - if ((int)sin4.sin_port <= 0) { - fprintf(stderr, "telnetd: %s: bad port #\n", *argv); - usage(); - /* NOT REACHED */ - } - sin4.sin_port = htons((u_short)sin4.sin_port); - } - } else { - sp = getservbyname("telnet", "tcp"); - if (sp == 0) { - fprintf(stderr, "telnetd: tcp/telnet: unknown service\n"); - exit(1); - } - sin4.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 *)&sin4, sizeof(sin4)) < 0) { - perror("bind"); - exit(1); - } - if (listen(s, 1) < 0) { - perror("listen"); - exit(1); - } - foo = sizeof(sin4); - ns = accept(s, (struct sockaddr *)&sin4, &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(&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); - memset(&from, 0, 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 (fromlen == sizeof (struct in_addr)) { -# if defined(HAVE_GETTOSBYNAME) - 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((struct sockaddr *)&from); - - /* NOTREACHED */ - return 0; -} /* 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 HAVE_GETTOSBYNAME - fprintf(stderr, " [-S tos]"); -#endif -#ifdef AUTHENTICATION - fprintf(stderr, " [-X auth-type]"); -#endif - fprintf(stderr, " [-U]\n\t"); - fprintf(stderr, " [-w [ip|maxhostlen[,[no]striplocal]]]\n\t"); - fprintf(stderr, " [port]\n"); - exit(1); -} - -static void encrypt_failure() -{ - char *lerror_message; - - if (auth_must_encrypt()) - lerror_message = "Encryption was not successfully negotiated. Goodbye.\r\n\r\n"; - else - lerror_message = "Unencrypted connection refused. Goodbye.\r\n\r\n"; - - netputs(lerror_message); - netflush(); - 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 -}; - -static int -getterminaltype(name) - char *name; -{ - settimer(baseline); -#if defined(AUTHENTICATION) - ttsuck(); - /* - * 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)) { - auth_wait(name); - } -#endif - -#ifdef ENCRYPTION - send_will(TELOPT_ENCRYPT, 1); - send_do(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) || - his_will_wont_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(); - } - if (must_encrypt || auth_must_encrypt()) { - time_t timeout = time(0) + 60; - - if (my_state_is_dont(TELOPT_ENCRYPT) || - my_state_is_wont(TELOPT_ENCRYPT) || - his_state_is_wont(TELOPT_AUTHENTICATION)) - encrypt_failure(); - - while (!EncryptStartInput()) { - if (time (0) > timeout) - encrypt_failure(); - ttloop(); - } - - while (!EncryptStartOutput()) { - if (time (0) > timeout) - encrypt_failure(); - ttloop(); - } - - while (!encrypt_is_encrypting()) { - if (time(0) > timeout) - encrypt_failure(); - ttloop(); - } - } -#endif /* ENCRYPTION */ - /* Options like environment require authentication and encryption - negotiation to be completed.*/ - auth_negotiated = 1; - if (his_state_is_will(TELOPT_TSPEED)) { - static unsigned char sb[] = - { IAC, SB, TELOPT_TSPEED, TELQUAL_SEND, IAC, SE }; - netwrite(sb, sizeof(sb)); - } - if (his_state_is_will(TELOPT_XDISPLOC)) { - static unsigned char sb[] = - { IAC, SB, TELOPT_XDISPLOC, TELQUAL_SEND, IAC, SE }; - netwrite(sb, sizeof(sb)); - } - if (his_state_is_will(TELOPT_NEW_ENVIRON)) { - static unsigned char sb[] = - { IAC, SB, TELOPT_NEW_ENVIRON, TELQUAL_SEND, IAC, SE }; - netwrite(sb, sizeof(sb)); - } - else if (his_state_is_will(TELOPT_OLD_ENVIRON)) { - static unsigned char sb[] = - { IAC, SB, TELOPT_OLD_ENVIRON, TELQUAL_SEND, IAC, SE }; - netwrite(sb, sizeof(sb)); - } - if (his_state_is_will(TELOPT_TTYPE)) - netwrite(ttytype_sbbuf, sizeof(ttytype_sbbuf)); - - 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) - 1); - first[sizeof(first) - 1] = '\0'; - for(;;) { - /* - * Save the unknown name, and request the next name. - */ - (void) strncpy(last, terminaltype, sizeof(last) - 1); - last[sizeof(last) - 1] = '\0'; - _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(terminaltype) - 1); - terminaltype[sizeof(terminaltype) - 1] = '\0'; - } - break; - } - } - } - } -#ifdef AUTHENTICATION - return(auth_check(name)); -#else - return(-1); -#endif -} /* end of getterminaltype */ - -static 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); - netwrite(ttytype_sbbuf, sizeof(ttytype_sbbuf)); - while (sequenceIs(ttypesubopt, baseline)) - ttloop(); -} - - int -terminaltypeok(s) - char *s; -{ - char buf[1024]; - - if (!*s) - 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); -} -#if HAVE_ARPA_NAMESER_H -#include <arpa/nameser.h> -#endif - -#ifndef MAXDNAME -#define MAXDNAME 256 /*per the rfc*/ -#endif - -char *hostname; -char host_name[MAXDNAME]; -char remote_host_name[MAXDNAME]; -char *rhost_sane; - -#ifndef convex -extern void telnet (int, int); -#else -extern void telnet (int, int, char *); -#endif - -/* - * Get a pty, scan input lines. - */ -static void doit(who) - struct sockaddr *who; -{ - int level; -#if defined(_SC_CRAY_SECURE_SYS) - int ptynum; -#endif - char user_name[256]; - long retval; - /* - * Find an available pty to use. - */ - pty_init(); - - - if ((retval = pty_getpty(&pty, line, 17)) != 0) { - fatal(net, error_message(retval)); - } - -#if defined(_SC_CRAY_SECURE_SYS) - /* - * set ttyp line security label - */ - if (secflag) { - char slave_dev[16]; -/*xxx This code needs to be fixed to work without ptynum; I don't understand why they don't currently use line, so I don't really know how to fix.*/ - snprintf(tty_dev, sizeof(tty_dev), "/dev/pty/%03d", ptynum); - if (setdevs(tty_dev, &dv) < 0) - fatal(net, "cannot set pty security"); - snprintf(slave_dev, sizeof(slave_dev), "/dev/ttyp%03d", ptynum); - if (setdevs(slave_dev, &dv) < 0) - fatal(net, "cannot set tty security"); - } -#endif /* _SC_CRAY_SECURE_SYS */ - - retval = pty_make_sane_hostname((struct sockaddr *) who, maxhostlen, - stripdomain, always_ip, - &rhost_sane); - if (retval) { - fatal(net, error_message(retval)); - } - if (registerd_host_only) { - /* Get name of connected client -- but we don't actually - use it. Just confirm that we can get it. */ - int aierror; - char hostnamebuf[NI_MAXHOST]; - aierror = getnameinfo (who, socklen (who), - hostnamebuf, sizeof (hostnamebuf), 0, 0, - NI_NAMEREQD); - if (aierror != 0) { - fatal(net, - "Couldn't resolve your address into a host name.\r\n" - "Please contact your net administrator"); - } - } - - (void) gethostname(host_name, sizeof (host_name)); - hostname = host_name; - -#if defined(AUTHENTICATION) || defined(ENCRYPTION) - auth_encrypt_init(hostname, rhost_sane, "TELNETD", 1); -#endif - - init_env(); - -#ifdef SIGTTOU - /* - * Ignoring SIGTTOU keeps the kernel from blocking us. - * we tweak the tty with an ioctl() - * (in ttioct() in /sys/tty.c in a BSD kernel) - */ - (void) signal(SIGTTOU, SIG_IGN); -#endif - /* - * get terminal type. - */ - *user_name = 0; - level = getterminaltype(user_name); - setenv("TERM", *terminaltype ? terminaltype : "network", 1); - -#if defined (AUTHENTICATION) - if (level < 0 && auth_level > 0) { - fatal (net, "No authentication provided"); - exit (-1); - } -#endif - /* - * Start up the login process on the slave side of the terminal - */ -#ifndef convex - startslave(rhost_sane, 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, rhost_sane); -#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 *HEstr; - char *HN; - char *IM; - void netflush(); - - /* - * 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, netputs("td: simulating recv\r\n")); - 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 - - (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; - - HEstr = getstr("he", &cp); - HN = getstr("hn", &cp); - IM = getstr("im", &cp); - if (HN && *HN) - (void) strncpy(host_name, HN, sizeof(host_name) - 1); - host_name[sizeof(host_name) - 1] = '\0'; - if (IM == 0) - IM = ""; - } else { - IM = get_default_IM(); - HEstr = 0; - } - edithost(HEstr, 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, netputs("td: Entering processing loop\r\n")); - -#ifdef convex - startslave(host); -#endif - - 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(16, &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), - netprintf("td: netread %d chars\r\n", ncc)); - 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. - */ - netprintf_urg("%c%c", 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; - netprintf("%c%c%c%c%c%c", - IAC, SB, TELOPT_LFLOW, - flowmode ? LFLOW_ON - : LFLOW_OFF, - IAC, SE); - } - } - 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) - netprintf("%c", c); -#if defined(CRAY2) && defined(UNICOS5) - else if (c == '\n' && - my_state_is_wont(TELOPT_BINARY) && newmap) - netputs("\r"); -#endif /* defined(CRAY2) && defined(UNICOS5) */ - netprintf("%c", c); - if ((c == '\r') && (my_state_is_wont(TELOPT_BINARY))) { - if (pcc > 0 && ((*ptyip & 0377) == '\n')) { - netprintf("%c", *ptyip++ & 0377); - pcc--; - } else - netprintf("%c", '\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(); - } - (void) signal(SIGCHLD, SIG_DFL); - 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); - if (readstream_termio(ip->ioc_cmd, ibuf, - &vstop, &vstart, &ixon)) { - if (readstream_termios(ip->ioc_cmd, ibuf, - &vstop, &vstart, &ixon)) { - 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 */ - -#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 */ -} - -/* - * 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 - netputs("\r\n[Yes]\r\n"); -} - - 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'; -} |