/* * 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. 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. */ #include "telnet_locl.h" #include #if defined(IPPROTO_IP) && defined(IP_TOS) int tos = -1; #endif /* defined(IPPROTO_IP) && defined(IP_TOS) */ char *hostname; typedef int (*intrtn_t) __P ((int, char **)); static int call __P ((intrtn_t, ...)); typedef int (*cmd_handler_t) P ((int, char **)); typedef struct { char *name; /* command name */ char *help; /* help string (NULL for no help) */ cmd_handler_t handler; /* routine which executes command */ int needconnect; /* Do we need to be connected to execute? */ } Command; static char line[256]; static char saveline[256]; static int margc; static char *margv[20]; #if defined(SKEY) #include #define PATH_SKEY "/usr/bin/skey" int skey_calc (int argc, char *argv[]) { int status; if (argc != 3) { printf ("usage: %s sequence challenge\n", argv[0]); return 0; } switch (fork ()) { case 0: execv (PATH_SKEY, argv); exit (1); case -1: err (1, "fork"); break; default: (void) wait (&status); if (WIFEXITED (status)) return (WEXITSTATUS (status)); return (0); } } #endif static void makeargv (void) { char *cp, *cp2, c; char **argp = margv; margc = 0; cp = line; if (*cp == '!') { /* Special case shell escape */ strcpy (saveline, line); /* save for shell command */ *argp++ = "!"; /* No room in string to get this */ margc++; cp++; } while ((c = *cp)) { int inquote = 0; while (isspace (c)) c = *++cp; if (c == '\0') break; *argp++ = cp; margc += 1; for (cp2 = cp; c != '\0'; c = *++cp) { if (inquote) { if (c == inquote) { inquote = 0; continue; } } else { if (c == '\\') { if ((c = *++cp) == '\0') break; } else if (c == '"') { inquote = '"'; continue; } else if (c == '\'') { inquote = '\''; continue; } else if (isspace (c)) break; } *cp2++ = c; } *cp2 = '\0'; if (c == '\0') break; cp++; } *argp++ = 0; } /* * Make a character string into a number. * * Todo: 1. Could take random integers (12, 0x12, 012, 0b1). */ static char special (char *s) { char c; char b; switch (*s) { case '^': b = *++s; if (b == '?') { c = b | 0x40; /* DEL */ } else { c = b & 0x1f; } break; default: c = *s; break; } return c; } /* * Construct a control character sequence * for a special character. */ static char * control (cc_t c) { static char buf[5]; /* * The only way I could get the Sun 3.5 compiler * to shut up about * if ((unsigned int)c >= 0x80) * was to assign "c" to an unsigned int variable... * Arggg.... */ unsigned int uic = (unsigned int) c; if (uic == 0x7f) return ("^?"); if (c == (cc_t) _POSIX_VDISABLE) { return "off"; } if (uic >= 0x80) { buf[0] = '\\'; buf[1] = ((c >> 6) & 07) + '0'; buf[2] = ((c >> 3) & 07) + '0'; buf[3] = (c & 07) + '0'; buf[4] = 0; } else if (uic >= 0x20) { buf[0] = c; buf[1] = 0; } else { buf[0] = '^'; buf[1] = '@' + c; buf[2] = 0; } return (buf); } /* * The following are data structures and routines for * the "send" command. * */ typedef int (*send_handler_t) P ((const char *)); struct sendlist { const char *name; /* How user refers to it (case independent) */ const char *help; /* Help information (0 ==> no help) */ int needconnect; /* Need to be connected */ int narg; /* Number of arguments */ send_handler_t handler; /* Routine to perform (for special ops) */ int nbyte; /* Number of bytes to send this command */ int what; /* Character to be sent (<0 ==> special) */ }; static int send_esc P ((const char *)), send_help P ((const char *)), send_docmd P ((const char *)), send_dontcmd P ((const char *)), send_willcmd P ((const char *)), send_wontcmd P ((const char *)); static struct sendlist Sendlist[] = { {"ao", "Send Telnet Abort output", 1, 0, 0, 2, AO}, {"ayt", "Send Telnet 'Are You There'", 1, 0, 0, 2, AYT}, {"brk", "Send Telnet Break", 1, 0, 0, 2, BREAK}, {"break", 0, 1, 0, 0, 2, BREAK}, {"ec", "Send Telnet Erase Character", 1, 0, 0, 2, EC}, {"el", "Send Telnet Erase Line", 1, 0, 0, 2, EL}, {"escape", "Send current escape character", 1, 0, send_esc, 1, 0}, {"ga", "Send Telnet 'Go Ahead' sequence", 1, 0, 0, 2, GA}, {"ip", "Send Telnet Interrupt Process", 1, 0, 0, 2, IP}, {"intp", 0, 1, 0, 0, 2, IP}, {"interrupt", 0, 1, 0, 0, 2, IP}, {"intr", 0, 1, 0, 0, 2, IP}, {"nop", "Send Telnet 'No operation'", 1, 0, 0, 2, NOP}, {"eor", "Send Telnet 'End of Record'", 1, 0, 0, 2, EOR}, {"abort", "Send Telnet 'Abort Process'", 1, 0, 0, 2, ABORT}, {"susp", "Send Telnet 'Suspend Process'", 1, 0, 0, 2, SUSP}, {"eof", "Send Telnet End of File Character", 1, 0, 0, 2, xEOF}, {"synch", "Perform Telnet 'Synch operation'", 1, 0, (send_handler_t) dosynch, 2, 0}, {"getstatus", "Send request for STATUS", 1, 0, (send_handler_t) get_status, 6, 0}, {"?", "Display send options", 0, 0, send_help, 0, 0}, {"help", 0, 0, 0, send_help, 0, 0}, {"do", 0, 0, 1, send_docmd, 3, 0}, {"dont", 0, 0, 1, send_dontcmd, 3, 0}, {"will", 0, 0, 1, send_willcmd, 3, 0}, {"wont", 0, 0, 1, send_wontcmd, 3, 0}, {NULL, NULL, 0, 0, NULL, 0, 0} }; #define GETSEND(name) ((struct sendlist *) genget(name, (char **) Sendlist, \ sizeof(struct sendlist))) static int sendcmd (int argc, char *argv[]) { int count; /* how many bytes we are going to need to send */ int i; struct sendlist *s; /* pointer to current command */ int success = 0; int needconnect = 0; if (argc < 2) { printf ("need at least one argument for 'send' command\r\n"); printf ("'send ?' for help\r\n"); return 0; } /* * First, validate all the send arguments. * In addition, we see how much space we are going to need, and * whether or not we will be doing a "SYNCH" operation (which * flushes the network queue). */ count = 0; for (i = 1; i < argc; i++) { s = GETSEND (argv[i]); if (s == 0) { printf ("Unknown send argument '%s'\r\n'send ?' for help.\r\n", argv[i]); return 0; } else if (Ambiguous (s)) { printf ("Ambiguous send argument '%s'\r\n'send ?' for help.\r\n", argv[i]); return 0; } if (i + s->narg >= argc) { fprintf (stderr, "Need %d argument%s to 'send %s' command. 'send %s ?' for help.\r\n", s->narg, s->narg == 1 ? "" : "s", s->name, s->name); return 0; } count += s->nbyte; if (s->handler == send_help) { send_help (NULL); return 0; } i += s->narg; needconnect += s->needconnect; } if (!connected && needconnect) { printf ("?Need to be connected first.\r\n"); printf ("'send ?' for help\r\n"); return 0; } /* Now, do we have enough room? */ if (NETROOM () < count) { printf ("There is not enough room in the buffer TO the network\r\n"); printf ("to process your request. Nothing will be done.\r\n"); printf ("('send synch' will throw away most data in the network\r\n"); printf ("buffer, if this might help.)\r\n"); return 0; } /* OK, they are all OK, now go through again and actually send */ count = 0; for (i = 1; i < argc; i++) { if ((s = GETSEND (argv[i])) == 0) { fprintf (stderr, "Telnet 'send' error - argument disappeared!\r\n"); (void) quit (); /*NOTREACHED*/} if (s->handler) { count++; #if 0 /* XXX no command takes more than 1 arg */ success += (*s->handler) ((s->narg > 0) ? argv[i + 1] : 0, (s->narg > 1) ? argv[i + 2] : 0); #else success += (*s->handler) ((s->narg > 0) ? argv[i + 1] : NULL); #endif i += s->narg; } else { NET2ADD (IAC, s->what); printoption ("SENT", IAC, s->what); } } return (count == success); } typedef void (*tncmd_handler_t) (int, int); static int send_tncmd (tncmd_handler_t func, const char *cmd, const char *name); static int send_esc (const char *arg) { (void) arg; NETADD (escape); return 1; } static int send_docmd (const char *name) { return (send_tncmd (send_do, "do", name)); } static int send_dontcmd (const char *name) { return (send_tncmd (send_dont, "dont", name)); } static int send_willcmd (const char *name) { return (send_tncmd (send_will, "will", name)); } static int send_wontcmd (const char *name) { return (send_tncmd (send_wont, "wont", name)); } extern char *telopts[]; int send_tncmd (tncmd_handler_t func, const char *cmd, const char *name) { char **cpp; int val = 0; if (isprefix (name, "help") || isprefix (name, "?")) { int col, len; printf ("Usage: send %s \r\n", cmd); printf ("\"value\" must be from 0 to 255\r\n"); printf ("Valid options are:\r\n\t"); col = 8; for (cpp = telopts; *cpp; cpp++) { len = strlen (*cpp) + 3; if (col + len > 65) { printf ("\r\n\t"); col = 8; } printf (" \"%s\"", *cpp); col += len; } printf ("\r\n"); return 0; } cpp = (char **) genget (name, telopts, sizeof (char *)); if (Ambiguous (cpp)) { fprintf (stderr, "'%s': ambiguous argument ('send %s ?' for help).\r\n", name, cmd); return 0; } if (cpp) { val = cpp - telopts; } else { const char *cp = name; while (*cp >= '0' && *cp <= '9') { val *= 10; val += *cp - '0'; cp++; } if (*cp != 0) { fprintf (stderr, "'%s': unknown argument ('send %s ?' for help).\r\n", name, cmd); return 0; } else if (val < 0 || val > 255) { fprintf (stderr, "'%s': bad value ('send %s ?' for help).\r\n", name, cmd); return 0; } } if (!connected) { printf ("?Need to be connected first.\r\n"); return 0; } (*func) (val, 1); return 1; } static int send_help (const char *arg) { struct sendlist *s; /* pointer to current command */ (void) arg; for (s = Sendlist; s->name; s++) { if (s->help) printf ("%-15s %s\r\n", s->name, s->help); } return (0); } /* * The following are the routines and data structures referred * to by the arguments to the "toggle" command. */ static int lclchars (int arg) { (void) arg; donelclchars = 1; return 1; } static int togdebug (int arg) { (void) arg; #ifndef NOT43 if (net > 0 && (SetSockOpt (net, SOL_SOCKET, SO_DEBUG, debug)) < 0) { perror ("setsockopt (SO_DEBUG)"); } #else /* NOT43 */ if (debug) { if (net > 0 && SetSockOpt (net, SOL_SOCKET, SO_DEBUG, 0, 0) < 0) perror ("setsockopt (SO_DEBUG)"); } else printf ("Cannot turn off socket debugging\r\n"); #endif /* NOT43 */ return 1; } static int togcrlf (int arg) { (void) arg; if (crlf) { printf ("Will send carriage returns as telnet .\r\n"); } else { printf ("Will send carriage returns as telnet .\r\n"); } return 1; } int binmode; static int togbinary (int val) { donebinarytoggle = 1; if (val >= 0) { binmode = val; } else { if (my_want_state_is_will (TELOPT_BINARY) && my_want_state_is_do (TELOPT_BINARY)) { binmode = 1; } else if (my_want_state_is_wont (TELOPT_BINARY) && my_want_state_is_dont (TELOPT_BINARY)) { binmode = 0; } val = binmode ? 0 : 1; } if (val == 1) { if (my_want_state_is_will (TELOPT_BINARY) && my_want_state_is_do (TELOPT_BINARY)) { printf ("Already operating in binary mode with remote host.\r\n"); } else { printf ("Negotiating binary mode with remote host.\r\n"); tel_enter_binary (3); } } else { if (my_want_state_is_wont (TELOPT_BINARY) && my_want_state_is_dont (TELOPT_BINARY)) { printf ("Already in network ascii mode with remote host.\r\n"); } else { printf ("Negotiating network ascii mode with remote host.\r\n"); tel_leave_binary (3); } } return 1; } static int togrbinary (int val) { donebinarytoggle = 1; if (val == -1) val = my_want_state_is_do (TELOPT_BINARY) ? 0 : 1; if (val == 1) { if (my_want_state_is_do (TELOPT_BINARY)) { printf ("Already receiving in binary mode.\r\n"); } else { printf ("Negotiating binary mode on input.\r\n"); tel_enter_binary (1); } } else { if (my_want_state_is_dont (TELOPT_BINARY)) { printf ("Already receiving in network ascii mode.\r\n"); } else { printf ("Negotiating network ascii mode on input.\r\n"); tel_leave_binary (1); } } return 1; } static int togxbinary (int val) { donebinarytoggle = 1; if (val == -1) val = my_want_state_is_will (TELOPT_BINARY) ? 0 : 1; if (val == 1) { if (my_want_state_is_will (TELOPT_BINARY)) { printf ("Already transmitting in binary mode.\r\n"); } else { printf ("Negotiating binary mode on output.\r\n"); tel_enter_binary (2); } } else { if (my_want_state_is_wont (TELOPT_BINARY)) { printf ("Already transmitting in network ascii mode.\r\n"); } else { printf ("Negotiating network ascii mode on output.\r\n"); tel_leave_binary (2); } } return 1; } static int togglehelp P ((int)); #if defined(AUTHENTICATION) extern int auth_togdebug P ((int)); #endif #if defined(ENCRYPTION) extern int EncryptAutoEnc P ((int)); extern int EncryptAutoDec P ((int)); extern int EncryptDebug P ((int)); extern int EncryptVerbose P ((int)); #endif typedef int (*toggle_handler_t) P ((int)); struct togglelist { const char *name; /* name of toggle */ const char *help; /* help message */ toggle_handler_t handler; /* routine to do actual setting */ int *variable; char *actionexplanation; int needconnect; /* Need to be connected */ }; static struct togglelist Togglelist[] = { {"autoflush", "flushing of output when sending interrupt characters", 0, &autoflush, "flush output when sending interrupt characters", 0}, {"autosynch", "automatic sending of interrupt characters in urgent mode", 0, &autosynch, "send interrupt characters in urgent mode", 0}, #if defined(AUTHENTICATION) {"autologin", "automatic sending of login and/or authentication info", 0, &autologin, "send login name and/or authentication information", 0}, {"authdebug", "Toggle authentication debugging", auth_togdebug, 0, "print authentication debugging information", 0}, #endif #if defined(ENCRYPTION) {"autoencrypt", "automatic encryption of data stream", EncryptAutoEnc, 0, "automatically encrypt output", 0}, {"autodecrypt", "automatic decryption of data stream", EncryptAutoDec, 0, "automatically decrypt input", 0}, {"verbose_encrypt", "Toggle verbose encryption output", EncryptVerbose, 0, "print verbose encryption output", 0}, {"encdebug", "Toggle encryption debugging", EncryptDebug, 0, "print encryption debugging information", 0}, #endif {"skiprc", "don't read ~/.telnetrc file", 0, &skiprc, "skip reading of ~/.telnetrc file", 0}, {"binary", "sending and receiving of binary data", togbinary, 0, 0, 0}, {"inbinary", "receiving of binary data", togrbinary, 0, 0, 0}, {"outbinary", "sending of binary data", togxbinary, 0, 0, 0}, {"crlf", "sending carriage returns as telnet ", togcrlf, &crlf, 0, 0}, {"crmod", "mapping of received carriage returns", 0, &crmod, "map carriage return on output", 0}, {"localchars", "local recognition of certain control characters", lclchars, &localchars, "recognize certain control characters", 0}, {" ", "", 0, NULL, NULL, 0}, /* empty line */ #if defined(unix) && defined(TN3270) {"apitrace", "(debugging) toggle tracing of API transactions", 0, &apitrace, "trace API transactions", 0}, {"cursesdata", "(debugging) toggle printing of hexadecimal curses data", 0, &cursesdata, "print hexadecimal representation of curses data", 0}, #endif /* defined(unix) && defined(TN3270) */ {"debug", "debugging", togdebug, &debug, "turn on socket level debugging", 0}, {"netdata", "printing of hexadecimal network data (debugging)", 0, &netdata, "print hexadecimal representation of network traffic", 0}, {"prettydump", "output of \"netdata\" to user readable format (debugging)", 0, &prettydump, "print user readable output for \"netdata\"", 0}, {"options", "viewing of options processing (debugging)", 0, &showoptions, "show option processing", 0}, #if defined(unix) {"termdata", "(debugging) toggle printing of hexadecimal terminal data", 0, &termdata, "print hexadecimal representation of terminal traffic", 0}, #endif /* defined(unix) */ {"?", 0, togglehelp, NULL, NULL, 0}, {"help", 0, togglehelp, NULL, NULL, 0}, {NULL, NULL, NULL, NULL, NULL, 0} }; static int togglehelp (int arg) { struct togglelist *c; (void) arg; for (c = Togglelist; c->name; c++) { if (c->help) { if (*c->help) printf ("%-15s toggle %s\r\n", c->name, c->help); else printf ("\r\n"); } } printf ("\r\n"); printf ("%-15s %s\r\n", "?", "display help information"); return 0; } static void settogglehelp (int set) { struct togglelist *c; for (c = Togglelist; c->name; c++) { if (c->help) { if (*c->help) printf ("%-15s %s %s\r\n", c->name, set ? "enable" : "disable", c->help); else printf ("\r\n"); } } } #define GETTOGGLE(name) (struct togglelist *) \ genget(name, (char **) Togglelist, sizeof(struct togglelist)) static int toggle (int argc, char *argv[]) { int retval = 1; char *name; struct togglelist *c; if (argc < 2) { fprintf (stderr, "Need an argument to 'toggle' command. 'toggle ?' for help.\r\n"); return 0; } argc--; argv++; while (argc--) { name = *argv++; c = GETTOGGLE (name); if (Ambiguous (c)) { fprintf (stderr, "'%s': ambiguous argument ('toggle ?' for help).\r\n", name); return 0; } else if (c == 0) { fprintf (stderr, "'%s': unknown argument ('toggle ?' for help).\r\n", name); return 0; } else if (!connected && c->needconnect) { printf ("?Need to be connected first.\r\n"); printf ("'send ?' for help\r\n"); return 0; } else { if (c->variable) { *c->variable = !*c->variable; /* invert it */ if (c->actionexplanation) { printf ("%s %s.\r\n", *c->variable ? "Will" : "Won't", c->actionexplanation); } } if (c->handler) { retval &= (*c->handler) (-1); } } } return retval; } /* * The following perform the "set" command. */ #ifdef USE_TERMIO struct termios new_tc; #endif typedef void (*set_handler_t) P ((char *)); struct setlist { const char *name; /* name */ const char *help; /* help information */ set_handler_t handler; cc_t *charp; /* where it is located at */ }; static struct setlist Setlist[] = { #ifdef KLUDGELINEMODE {"echo", "character to toggle local echoing on/off", 0, &echoc}, #endif {"escape", "character to escape back to telnet command mode", 0, &escape}, {"rlogin", "rlogin escape character", 0, &rlogin}, {"tracefile", "file to write trace information to", (set_handler_t) SetNetTrace, (cc_t *) NetTraceFile}, {" ", "", 0, NULL}, {" ", "The following need 'localchars' to be toggled true", 0, 0}, {"flushoutput", "character to cause an Abort Output", 0, &termFlushChar}, {"interrupt", "character to cause an Interrupt Process", 0, &termIntChar}, {"quit", "character to cause an Abort process", 0, &termQuitChar}, {"eof", "character to cause an EOF ", 0, &termEofChar}, {" ", "", 0, NULL}, {" ", "The following are for local editing in linemode", 0, 0}, {"erase", "character to use to erase a character", 0, &termEraseChar}, {"kill", "character to use to erase a line", 0, &termKillChar}, {"lnext", "character to use for literal next", 0, &termLiteralNextChar}, {"susp", "character to cause a Suspend Process", 0, &termSuspChar}, {"reprint", "character to use for line reprint", 0, &termRprntChar}, {"worderase", "character to use to erase a word", 0, &termWerasChar}, {"start", "character to use for XON", 0, &termStartChar}, {"stop", "character to use for XOFF", 0, &termStopChar}, {"forw1", "alternate end of line character", 0, &termForw1Char}, {"forw2", "alternate end of line character", 0, &termForw2Char}, {"ayt", "alternate AYT character", 0, &termAytChar}, {NULL, NULL, 0, NULL} }; static struct setlist * getset (char *name) { return (struct setlist *) genget (name, (char **) Setlist, sizeof (struct setlist)); } void set_escape_char (char *s) { if (rlogin != _POSIX_VDISABLE) { rlogin = (s && *s) ? special (s) : _POSIX_VDISABLE; printf ("Telnet rlogin escape character is '%s'.\r\n", control (rlogin)); } else { escape = (s && *s) ? special (s) : _POSIX_VDISABLE; printf ("Telnet escape character is '%s'.\r\n", control (escape)); } } static int setcmd (int argc, char *argv[]) { int value; struct setlist *ct; struct togglelist *c; if (argc < 2 || argc > 3) { printf ("Format is 'set Name Value'\r\n'set ?' for help.\r\n"); return 0; } if ((argc == 2) && (isprefix (argv[1], "?") || isprefix (argv[1], "help"))) { for (ct = Setlist; ct->name; ct++) printf ("%-15s %s\r\n", ct->name, ct->help); printf ("\r\n"); settogglehelp (1); printf ("%-15s %s\r\n", "?", "display help information"); return 0; } ct = getset (argv[1]); if (ct == 0) { c = GETTOGGLE (argv[1]); if (c == 0) { fprintf (stderr, "'%s': unknown argument ('set ?' for help).\r\n", argv[1]); return 0; } else if (Ambiguous (c)) { fprintf (stderr, "'%s': ambiguous argument ('set ?' for help).\r\n", argv[1]); return 0; } else if (!connected && c->needconnect) { printf ("?Need to be connected first.\r\n"); printf ("'send ?' for help\r\n"); return 0; } if (c->variable) { if ((argc == 2) || (strcmp ("on", argv[2]) == 0)) *c->variable = 1; else if (strcmp ("off", argv[2]) == 0) *c->variable = 0; else { printf ("Format is 'set togglename [on|off]'\r\n'set ?' for help.\r\n"); return 0; } if (c->actionexplanation) { printf ("%s %s.\r\n", *c->variable ? "Will" : "Won't", c->actionexplanation); } } if (c->handler) (*c->handler) (1); } else if (argc != 3) { printf ("Format is 'set Name Value'\r\n'set ?' for help.\r\n"); return 0; } else if (Ambiguous (ct)) { fprintf (stderr, "'%s': ambiguous argument ('set ?' for help).\r\n", argv[1]); return 0; } else if (ct->handler) { (*ct->handler) (argv[2]); printf ("%s set to \"%s\".\r\n", ct->name, (char *) ct->charp); } else { if (strcmp ("off", argv[2])) { value = special (argv[2]); } else { value = _POSIX_VDISABLE; } *(ct->charp) = (cc_t) value; printf ("%s character is '%s'.\r\n", ct->name, control (*(ct->charp))); } slc_check (); return 1; } static int unsetcmd (int argc, char *argv[]) { struct setlist *ct; struct togglelist *c; char *name; if (argc < 2) { fprintf (stderr, "Need an argument to 'unset' command. 'unset ?' for help.\r\n"); return 0; } if (isprefix (argv[1], "?") || isprefix (argv[1], "help")) { for (ct = Setlist; ct->name; ct++) printf ("%-15s %s\r\n", ct->name, ct->help); printf ("\r\n"); settogglehelp (0); printf ("%-15s %s\r\n", "?", "display help information"); return 0; } argc--; argv++; while (argc--) { name = *argv++; ct = getset (name); if (ct == 0) { c = GETTOGGLE (name); if (c == 0) { fprintf (stderr, "'%s': unknown argument ('unset ?' for help).\r\n", name); return 0; } else if (Ambiguous (c)) { fprintf (stderr, "'%s': ambiguous argument ('unset ?' for help).\r\n", name); return 0; } if (c->variable) { *c->variable = 0; if (c->actionexplanation) { printf ("%s %s.\r\n", *c->variable ? "Will" : "Won't", c->actionexplanation); } } if (c->handler) (*c->handler) (0); } else if (Ambiguous (ct)) { fprintf (stderr, "'%s': ambiguous argument ('unset ?' for help).\r\n", name); return 0; } else if (ct->handler) { (*ct->handler) (0); printf ("%s reset to \"%s\".\r\n", ct->name, (char *) ct->charp); } else { *(ct->charp) = _POSIX_VDISABLE; printf ("%s character is '%s'.\r\n", ct->name, control (*(ct->charp))); } } return 1; } /* * The following are the data structures and routines for the * 'mode' command. */ extern int kludgelinemode; static int dokludgemode (int arg __attribute__ ((unused))) { kludgelinemode = 1; send_wont (TELOPT_LINEMODE, 1); send_dont (TELOPT_SGA, 1); send_dont (TELOPT_ECHO, 1); return 1; } static int dolinemode (int arg __attribute__ ((unused))) { if (kludgelinemode) send_dont (TELOPT_SGA, 1); send_will (TELOPT_LINEMODE, 1); send_dont (TELOPT_ECHO, 1); return 1; } static int docharmode (int arg) { (void) arg; if (kludgelinemode) send_do (TELOPT_SGA, 1); else send_wont (TELOPT_LINEMODE, 1); send_do (TELOPT_ECHO, 1); return 1; } extern int linemode; static int dolmmode (int bit, int on) { unsigned char c; if (my_want_state_is_wont (TELOPT_LINEMODE)) { printf ("?Need to have LINEMODE option enabled first.\r\n"); printf ("'mode ?' for help.\r\n"); return 0; } if (on) c = (linemode | bit); else c = (linemode & ~bit); lm_mode (&c, 1, 1); return 1; } static int tn_setmode (int bit) { return dolmmode (bit, 1); } static int tn_clearmode (int bit) { return dolmmode (bit, 0); } typedef int (*mode_handler_t) P ((int)); struct modelist { const char *name; /* command name */ const char *help; /* help string */ mode_handler_t handler; /* routine which executes command */ int needconnect; /* Do we need to be connected to execute? */ int arg1; }; static int modehelp __P ((int)); static struct modelist ModeList[] = { {"character", "Disable LINEMODE option", docharmode, 1, 0}, #ifdef KLUDGELINEMODE {"", "(or disable obsolete line-by-line mode)", NULL, 0, 0}, #endif {"line", "Enable LINEMODE option", dolinemode, 1, 0}, #ifdef KLUDGELINEMODE {"", "(or enable obsolete line-by-line mode)", NULL, 0, 0}, #endif {"", "", 0, 0, 0}, {"", "These require the LINEMODE option to be enabled", NULL, 0, 0}, {"isig", "Enable signal trapping", tn_setmode, 1, MODE_TRAPSIG}, {"+isig", 0, tn_setmode, 1, MODE_TRAPSIG}, {"-isig", "Disable signal trapping", tn_clearmode, 1, MODE_TRAPSIG}, {"edit", "Enable character editing", tn_setmode, 1, MODE_EDIT}, {"+edit", 0, tn_setmode, 1, MODE_EDIT}, {"-edit", "Disable character editing", tn_clearmode, 1, MODE_EDIT}, {"softtabs", "Enable tab expansion", tn_setmode, 1, MODE_SOFT_TAB}, {"+softtabs", 0, tn_setmode, 1, MODE_SOFT_TAB}, {"-softtabs", "Disable character editing", tn_clearmode, 1, MODE_SOFT_TAB}, {"litecho", "Enable literal character echo", tn_setmode, 1, MODE_LIT_ECHO}, {"+litecho", 0, tn_setmode, 1, MODE_LIT_ECHO}, {"-litecho", "Disable literal character echo", tn_clearmode, 1, MODE_LIT_ECHO}, {"help", 0, modehelp, 0, 0}, #ifdef KLUDGELINEMODE {"kludgeline", 0, dokludgemode, 1, 0}, #endif {"", "", 0, 0, 0}, {"?", "Print help information", modehelp, 0, 0}, {NULL, NULL, NULL, 0, 0}, }; static int modehelp (int arg) { struct modelist *mt; (void) arg; printf ("format is: 'mode Mode', where 'Mode' is one of:\r\n\r\n"); for (mt = ModeList; mt->name; mt++) { if (mt->help) { if (*mt->help) printf ("%-15s %s\r\n", mt->name, mt->help); else printf ("\r\n"); } } return 0; } #define GETMODECMD(name) (struct modelist *) \ genget(name, (char **) ModeList, sizeof(struct modelist)) static int modecmd (int argc, char *argv[]) { struct modelist *mt; if (argc != 2) { printf ("'mode' command requires an argument\r\n"); printf ("'mode ?' for help.\r\n"); } else if ((mt = GETMODECMD (argv[1])) == 0) { fprintf (stderr, "Unknown mode '%s' ('mode ?' for help).\r\n", argv[1]); } else if (Ambiguous (mt)) { fprintf (stderr, "Ambiguous mode '%s' ('mode ?' for help).\r\n", argv[1]); } else if (mt->needconnect && !connected) { printf ("?Need to be connected first.\r\n"); printf ("'mode ?' for help.\r\n"); } else if (mt->handler) { return (*mt->handler) (mt->arg1); } return 0; } /* * The following data structures and routines implement the * "display" command. */ static int display (int argc, char *argv[]) { struct togglelist *tl; struct setlist *sl; #define dotog(tl) if (tl->variable && tl->actionexplanation) { \ if (*tl->variable) { \ printf("will"); \ } else { \ printf("won't"); \ } \ printf(" %s.\r\n", tl->actionexplanation); \ } #define doset(sl) if (sl->name && *sl->name != ' ') { \ if (sl->handler == 0) \ printf("%-15s [%s]\r\n", sl->name, control(*sl->charp)); \ else \ printf("%-15s \"%s\"\r\n", sl->name, (char *)sl->charp); \ } if (argc == 1) { for (tl = Togglelist; tl->name; tl++) { dotog (tl); } printf ("\r\n"); for (sl = Setlist; sl->name; sl++) { doset (sl); } } else { int i; for (i = 1; i < argc; i++) { sl = getset (argv[i]); tl = GETTOGGLE (argv[i]); if (Ambiguous (sl) || Ambiguous (tl)) { printf ("?Ambiguous argument '%s'.\r\n", argv[i]); return 0; } else if (!sl && !tl) { printf ("?Unknown argument '%s'.\r\n", argv[i]); return 0; } else { if (tl) { dotog (tl); } if (sl) { doset (sl); } } } } /*@*/ optionstatus (); #if defined(ENCRYPTION) EncryptStatus (); #endif return 1; #undef doset #undef dotog } /* * The following are the data structures, and many of the routines, * relating to command processing. */ /* * Set the escape character. */ static int setescape (int argc, char *argv[]) { char *arg; char buf[50]; printf ("Deprecated usage - please use 'set escape%s%s' in the future.\r\n", (argc > 2) ? " " : "", (argc > 2) ? argv[1] : ""); if (argc > 2) arg = argv[1]; else { printf ("new escape character: "); (void) fgets (buf, sizeof (buf), stdin); arg = buf; } if (arg[0] != '\0') escape = arg[0]; if (!In3270) { printf ("Escape character is '%s'.\r\n", control (escape)); } (void) fflush (stdout); return 1; } /*VARARGS*/ static int togcrmod (int ac, char *av[]) { (void) ac; (void) av; crmod = !crmod; printf ("Deprecated usage - please use 'toggle crmod' in the future.\r\n"); printf ("%s map carriage return on output.\r\n", crmod ? "Will" : "Won't"); (void) fflush (stdout); return 1; } static int telnetsuspend (int ac, char *av[]) { (void) ac; (void) av; #ifdef SIGTSTP setcommandmode (); { long oldrows, oldcols, newrows, newcols, error; error = (TerminalWindowSize (&oldrows, &oldcols) == 0) ? 1 : 0; (void) kill (0, SIGTSTP); /* * If we didn't get the window size before the SUSPEND, but we * can get them now (?), then send the NAWS to make sure that * we are set up for the right window size. */ if (TerminalWindowSize (&newrows, &newcols) && connected && (error || ((oldrows != newrows) || (oldcols != newcols)))) { sendnaws (); } } /* reget parameters in case they were changed */ TerminalSaveState (); setconnmode (0); #else printf ("Suspend is not supported. Try the '!' command instead\r\n"); #endif return 1; } #if !defined(TN3270) static int shell (int argc, char *argv[]) { long oldrows, oldcols, newrows, newcols, error; (void) &argv; setcommandmode (); error = (TerminalWindowSize (&oldrows, &oldcols) == 0) ? 1 : 0; switch (fork ()) { case -1: perror ("Fork failed\r\n"); break; case 0: { /* * Fire up the shell in the child. */ char *shellp, *shellname; shellp = getenv ("SHELL"); if (shellp == NULL) shellp = "/bin/sh"; if ((shellname = strrchr (shellp, '/')) == 0) shellname = shellp; else shellname++; if (argc > 1) execl (shellp, shellname, "-c", &saveline[1], (char *)NULL); else execl (shellp, shellname, (char *)NULL); perror ("Execl"); exit (1); } default: (void) wait ((int *) 0); /* Wait for the shell to complete */ if (TerminalWindowSize (&newrows, &newcols) && connected && (error || ((oldrows != newrows) || (oldcols != newcols)))) sendnaws (); break; } return 1; } #else /* !defined(TN3270) */ extern int shell (); #endif /* !defined(TN3270) */ extern int resettermname; /*VARARGS*/ static int bye (int argc, char *argv[]) { if (connected) { (void) shutdown (net, 2); printf ("Connection closed.\r\n"); (void) NetClose (net); connected = 0; resettermname = 1; #if defined(AUTHENTICATION) || defined(ENCRYPTION) auth_encrypt_connect (connected); #endif /* defined(AUTHENTICATION) */ /* reset options */ tninit (); #if defined(TN3270) SetIn3270 (); /* Get out of 3270 mode */ #endif /* defined(TN3270) */ } if ((argc != 2) || (strcmp (argv[1], "fromquit") != 0)) { siglongjmp (toplevel, 1); /* NOTREACHED */ } return 0; /* NOTREACHED */ } /*VARARGS*/ int quit (void) { (void) call (bye, "bye", "fromquit", 0); Exit (0); return 0; /*NOTREACHED*/} /*VARARGS*/ static int logout (int ac, char *av[]) { (void) ac; (void) av; send_do (TELOPT_LOGOUT, 1); (void) netflush (); return 1; } /* * The SLC command. */ typedef void (*slc_handler_t) P ((int)); struct slclist { const char *name; const char *help; slc_handler_t handler; int arg; }; static void slc_help P ((void)); struct slclist SlcList[] = { {"export", "Use local special character definitions", (slc_handler_t) slc_mode_export, 0}, {"import", "Use remote special character definitions", slc_mode_import, 1}, {"check", "Verify remote special character definitions", (slc_handler_t) slc_mode_import, 0}, {"help", 0, (slc_handler_t) slc_help, 0}, {"?", "Print help information", (slc_handler_t) slc_help, 0}, {NULL, NULL, NULL, 0}, }; static void slc_help (void) { struct slclist *c; for (c = SlcList; c->name; c++) { if (c->help) { if (*c->help) printf ("%-15s %s\r\n", c->name, c->help); else printf ("\r\n"); } } } static struct slclist * getslc (char *name) { return (struct slclist *) genget (name, (char **) SlcList, sizeof (struct slclist)); } static int slccmd (int argc, char *argv[]) { struct slclist *c; if (argc != 2) { fprintf (stderr, "Need an argument to 'slc' command. 'slc ?' for help.\r\n"); return 0; } c = getslc (argv[1]); if (c == 0) { fprintf (stderr, "'%s': unknown argument ('slc ?' for help).\r\n", argv[1]); return 0; } if (Ambiguous (c)) { fprintf (stderr, "'%s': ambiguous argument ('slc ?' for help).\r\n", argv[1]); return 0; } (*c->handler) (c->arg); slcstate (); return 1; } /* * The ENVIRON command. */ typedef void (*env_handler_t) P ((unsigned char *, unsigned char *)); struct envlist { const char *name; const char *help; env_handler_t handler; int narg; }; static void env_help (void); struct envlist EnvList[] = { {"define", "Define an environment variable", (env_handler_t) env_define, 2}, {"undefine", "Undefine an environment variable", (env_handler_t) env_undefine, 1}, {"export", "Mark an environment variable for automatic export", (env_handler_t) env_export, 1}, {"unexport", "Don't mark an environment variable for automatic export", (env_handler_t) env_unexport, 1}, {"send", "Send an environment variable", (env_handler_t) env_send, 1}, {"list", "List the current environment variables", (env_handler_t) env_list, 0}, {"help", 0, (env_handler_t) env_help, 0}, {"?", "Print help information", (env_handler_t) env_help, 0}, {NULL, NULL, NULL, 0}, }; static void env_help (void) { struct envlist *c; for (c = EnvList; c->name; c++) { if (c->help) { if (*c->help) printf ("%-15s %s\r\n", c->name, c->help); else printf ("\r\n"); } } } static struct envlist * getenvcmd (char *name) { return (struct envlist *) genget (name, (char **) EnvList, sizeof (struct envlist)); } static int env_cmd (int argc, char *argv[]) { struct envlist *c; if (argc < 2) { fprintf (stderr, "Need an argument to 'environ' command. 'environ ?' for help.\r\n"); return 0; } c = getenvcmd (argv[1]); if (c == 0) { fprintf (stderr, "'%s': unknown argument ('environ ?' for help).\r\n", argv[1]); return 0; } if (Ambiguous (c)) { fprintf (stderr, "'%s': ambiguous argument ('environ ?' for help).\r\n", argv[1]); return 0; } if (c->narg + 2 != argc) { fprintf (stderr, "Need %s%d argument%s to 'environ %s' command. 'environ ?' for help.\r\n", c->narg < argc + 2 ? "only " : "", c->narg, c->narg == 1 ? "" : "s", c->name); return 0; } (*c->handler) (argv[2], argv[3]); return 1; } struct env_lst { struct env_lst *next; /* pointer to next structure */ struct env_lst *prev; /* pointer to previous structure */ unsigned char *var; /* pointer to variable name */ unsigned char *value; /* pointer to variable value */ int export; /* whether and how to export this variable: */ /* 0: don't permit export */ /* 1: export with default list of variables */ /* 2: export if explicitly requested by the server only */ int welldefined; /* A well defined variable */ }; struct env_lst envlisthead; struct env_lst * env_find (unsigned char *var) { struct env_lst *ep; for (ep = envlisthead.next; ep; ep = ep->next) { if (strcmp ((char *) ep->var, (char *) var) == 0) return (ep); } return (NULL); } void env_init (void) { char **epp, *cp; struct env_lst *ep; for (epp = environ; *epp; epp++) { if ((cp = strchr (*epp, '='))) { *cp = '\0'; ep = env_define ((unsigned char *) *epp, (unsigned char *) cp + 1); ep->export = 0; *cp = '='; } } /* * Special case for DISPLAY variable. If it is ":0.0" or * "unix:0.0", we have to get rid of "unix" and insert our * hostname. */ if ((ep = env_find ("DISPLAY")) && ((*ep->value == ':') || (strncmp ((char *) ep->value, "unix:", 5) == 0))) { char hbuf[MAXHOSTNAMELEN]; char *cp2 = strchr ((char *) ep->value, ':'); gethostname (hbuf, sizeof hbuf); /* If this is not the full name, try to get it via DNS */ if (strchr (hbuf, '.') == 0) { struct hostent *he = gethostbyname (hbuf); if (he != 0) strncpy (hbuf, he->h_name, sizeof hbuf - 1); hbuf[sizeof hbuf - 1] = '\0'; } asprintf (&cp, "%s%s", hbuf, cp2); if (cp == NULL) err (1, "asprintf"); free (ep->value); ep->value = (unsigned char *) cp; } /* * If USER is not defined, but LOGNAME is, then add * USER with the value from LOGNAME. By default, we * don't export the USER variable. */ if ((env_find ("USER") == NULL) && (ep = env_find ("LOGNAME"))) { env_define ((unsigned char *) "USER", ep->value); env_unexport ((unsigned char *) "USER"); } if ((ep = env_find("TERM"))) ep->export = 2; env_export ((unsigned char *) "DISPLAY"); env_export ((unsigned char *) "PRINTER"); env_export ((unsigned char *) "XAUTHORITY"); } struct env_lst * env_define (unsigned char *var, unsigned char *value) { struct env_lst *ep; if ((ep = env_find (var))) { if (ep->var) free (ep->var); if (ep->value) free (ep->value); } else { if ((ep = malloc (sizeof (struct env_lst))) == NULL) err (1, "malloc"); ep->next = envlisthead.next; envlisthead.next = ep; ep->prev = &envlisthead; if (ep->next) ep->next->prev = ep; } ep->welldefined = opt_welldefined ((char *) var); ep->export = 1; if ((ep->var = strdup ((char *) var)) == NULL) err (1, "strdup"); if ((ep->value = strdup ((char *) value)) == NULL) err (1, "strdup"); return (ep); } void env_undefine (unsigned char *var) { struct env_lst *ep; if ((ep = env_find (var))) { ep->prev->next = ep->next; if (ep->next) ep->next->prev = ep->prev; if (ep->var) free (ep->var); if (ep->value) free (ep->value); free (ep); } } void env_export (unsigned char *var) { struct env_lst *ep; if ((ep = env_find (var))) ep->export = 1; } void env_unexport (unsigned char *var) { struct env_lst *ep; if ((ep = env_find (var)) != NULL) ep->export = 0; } void env_send (unsigned char *var) { struct env_lst *ep; if (my_state_is_wont (TELOPT_ENVIRON)) { fprintf (stderr, "Cannot send '%s': Telnet ENVIRON option not enabled\r\n", var); return; } ep = env_find (var); if (ep == 0) { fprintf (stderr, "Cannot send '%s': variable not defined\r\n", var); return; } env_opt_start_info (); env_opt_add (ep->var); env_opt_end (0); } void env_list (void) { struct env_lst *ep; for (ep = envlisthead.next; ep; ep = ep->next) { printf("%c %-20s %s\r\n", " *+"[ep->export], ep->var, ep->value); } } unsigned char * env_default (int init, int welldefined) { static struct env_lst *nep = NULL; if (init) { nep = &envlisthead; return NULL; } if (nep) { while ((nep = nep->next)) { if (nep->export == 1 && nep->welldefined == welldefined) return (nep->var); } } return (NULL); } unsigned char * env_getvalue (unsigned char *var) { struct env_lst *ep; if ((ep = env_find (var)) && ep->export) return (ep->value); return (NULL); } #if defined(__unix__) && defined(TN3270) static void filestuff (int fd) { int res; #ifdef F_GETOWN setconnmode (0); res = fcntl (fd, F_GETOWN, 0); setcommandmode (); if (res == -1) { perror ("fcntl"); return; } printf ("\tOwner is %d.\r\n", res); #endif setconnmode (0); res = fcntl (fd, F_GETFL, 0); setcommandmode (); if (res == -1) { perror ("fcntl"); return; } #ifdef notdef printf ("\tFlags are 0x%x: %s\r\n", res, decodeflags (res)); #endif } #endif /* defined(unix) && defined(TN3270) */ /* * Print status about the connection. */ /*ARGSUSED*/ static int status (int argc, char *argv[]) { if (connected) { printf ("Connected to %s.\r\n", hostname); if ((argc < 2) || strcmp (argv[1], "notmuch")) { int mode = getconnmode (); if (my_want_state_is_will (TELOPT_LINEMODE)) { printf ("Operating with LINEMODE option\r\n"); printf ("%s line editing\r\n", (mode & MODE_EDIT) ? "Local" : "No"); printf ("%s catching of signals\r\n", (mode & MODE_TRAPSIG) ? "Local" : "No"); slcstate (); #ifdef KLUDGELINEMODE } else if (kludgelinemode && my_want_state_is_dont (TELOPT_SGA)) { printf ("Operating in obsolete linemode\r\n"); #endif } else { printf ("Operating in single character mode\r\n"); if (localchars) printf ("Catching signals locally\r\n"); } printf ("%s character echo\r\n", (mode & MODE_ECHO) ? "Local" : "Remote"); if (my_want_state_is_will (TELOPT_LFLOW)) printf ("%s flow control\r\n", (mode & MODE_FLOW) ? "Local" : "No"); #if defined(ENCRYPTION) encrypt_display (); #endif } } else { printf ("No connection.\r\n"); } # if !defined(TN3270) printf ("Escape character is '%s'.\r\n", control (escape)); (void) fflush (stdout); # else /* !defined(TN3270) */ if ((!In3270) && ((argc < 2) || strcmp (argv[1], "notmuch"))) { printf ("Escape character is '%s'.\r\n", control (escape)); } # if defined(unix) if ((argc >= 2) && !strcmp (argv[1], "everything")) { printf ("SIGIO received %d time%s.\r\n", sigiocount, (sigiocount == 1) ? "" : "s"); if (In3270) { printf ("Process ID %d, process group %d.\r\n", getpid (), getpgrp ()); printf ("Terminal input:\r\n"); filestuff (tin); printf ("Terminal output:\r\n"); filestuff (tout); printf ("Network socket:\r\n"); filestuff (net); } } if (In3270 && transcom) { printf ("Transparent mode command is '%s'.\r\n", transcom); } # endif /* defined(unix) */ (void) fflush (stdout); if (In3270) { return 0; } # endif /* defined(TN3270) */ fflush (stdout); return 1; } #ifdef SIGINFO /* * Function that gets called when SIGINFO is received. */ void ayt_status (void) { (void) call (status, "status", "notmuch", 0); } #endif static Command *getcmd (char *name); static void cmdrc (char *m1, char *m2) { static char rcname[128]; Command *c; FILE *rcfile; int gotmachine = 0; int l1 = strlen (m1); int l2 = strlen (m2); char m1save[MAXHOSTNAMELEN]; if (skiprc) return; strncpy (m1save, m1, sizeof (m1save)); m1save[sizeof (m1save) - 1] = '\0'; m1 = m1save; if (rcname[0] == 0) { char *home = getenv ("HOME"); if (home == NULL || *home == '\0') return; snprintf (rcname, sizeof (rcname), "%s/.telnetrc", home ? home : ""); } if ((rcfile = fopen (rcname, "r")) == 0) { return; } for (;;) { if (fgets (line, sizeof (line), rcfile) == NULL) break; if (line[0] == 0) break; if (line[0] == '#') continue; if (gotmachine) { if (!isspace (line[0])) gotmachine = 0; } if (gotmachine == 0) { if (isspace (line[0])) continue; if (strncasecmp (line, m1, l1) == 0) strncpy (line, &line[l1], sizeof (line) - l1); else if (strncasecmp (line, m2, l2) == 0) strncpy (line, &line[l2], sizeof (line) - l2); else if (strncasecmp (line, "DEFAULT", 7) == 0) strncpy (line, &line[7], sizeof (line) - 7); else continue; if (line[0] != ' ' && line[0] != '\t' && line[0] != '\n') continue; gotmachine = 1; } makeargv (); if (margv[0] == 0) continue; c = getcmd (margv[0]); if (Ambiguous (c)) { printf ("?Ambiguous command: %s\r\n", margv[0]); continue; } if (c == 0) { printf ("?Invalid command: %s\r\n", margv[0]); continue; } /* * This should never happen... */ if (c->needconnect && !connected) { printf ("?Need to be connected first for %s.\r\n", margv[0]); continue; } (*c->handler) (margc, margv); } fclose (rcfile); } int tn (int argc, char *argv[]) { struct addrinfo hints, *res, *res0; int error; struct sockaddr_in s_in; #if defined(IP_OPTIONS) && defined(IPPROTO_IP) char *srp = NULL; int srlen = 0; #endif char *cmd, *hostp = 0, *portp = 0, *user = 0, *aliasp = 0; int retry; #ifdef NI_WITHSCOPEID const int niflags = NI_NUMERICHOST | NI_WITHSCOPEID; #else const int niflags = NI_NUMERICHOST; #endif /* clear the socket address prior to use */ memset ((char *) &s_in, 0, sizeof (s_in)); if (connected) { printf ("?Already connected to %s\r\n", hostname); return 0; } if (argc < 2) { (void) strcpy (line, "open "); printf ("(to) "); (void) fgets (&line[strlen (line)], sizeof (line) - strlen (line), stdin); makeargv (); argc = margc; argv = margv; } cmd = *argv; --argc; ++argv; while (argc) { if (strcmp (*argv, "help") == 0 || isprefix (*argv, "?")) goto usage; if (strcmp (*argv, "-l") == 0) { --argc; ++argv; if (argc == 0) goto usage; if ((user = strdup (*argv++)) == NULL) err (1, "strdup"); --argc; continue; } if (strcmp (*argv, "-b") == 0) { --argc; ++argv; if (argc == 0) goto usage; aliasp = *argv++; --argc; continue; } if (strcmp (*argv, "-a") == 0) { --argc; ++argv; autologin = 1; continue; } if (hostp == 0) { hostp = *argv++; --argc; continue; } if (portp == 0) { portp = *argv++; --argc; continue; } usage: printf ("usage: %s [-l user] [-a] host-name [port]\r\n", cmd); return 0; } if (hostp == 0) goto usage; #if defined(IP_OPTIONS) && defined(IPPROTO_IP) && 0 if (hostp[0] == '@' || hostp[0] == '!') { if ((hostname = strrchr (hostp, ':')) == NULL) hostname = strrchr (hostp, '@'); hostname++; srp = 0; temp = sourceroute (hostp, &srp, &srlen); if (temp == 0) { herror (srp); return 0; } else if (temp == -1) { printf ("Bad source route option: %s\r\n", hostp); return 0; } else { abort (); } } else #endif { hostname = hostp; memset (&hints, 0, sizeof (hints)); hints.ai_family = PF_UNSPEC; hints.ai_socktype = SOCK_STREAM; hints.ai_flags = AI_CANONNAME; if (portp == NULL) { portp = "telnet"; telnetport = 1; } else if (*portp == '-') { portp++; telnetport = 1; } again: error = getaddrinfo (hostp, portp, &hints, &res0); if (error) { if (error == EAI_NONAME && strcmp (portp, "telnet") == 0) { portp = "23"; goto again; } else if (error == EAI_SERVICE) warnx ("%s: bad port", portp); else warnx ("%s: %s", hostp, gai_strerror (error)); if (h_errno) herror (hostp); return 0; } } /* Search, if we use the telnetport or not. If telnetport == 1, we know it already */ if (portp && !telnetport) { int port; struct servent *sv = getservbyname ("telnet", "tcp"); /* If we don't have a telnet entry in /etc/services, assume telnetd runs on port 23. */ if (sv == NULL) port = 23; else port = sv->s_port; /* We have the telnet port, now look if the services runs on the same port as telnet */ sv = getservbyname (portp, "tcp"); if (sv == NULL) { if (strcmp (portp, "23") == 0) telnetport = 1; } else if (port == sv->s_port) telnetport = 1; } net = -1; retry = 0; for (res = res0; res; res = res->ai_next) { if (1 /* retry */ ) { char hbuf[NI_MAXHOST]; if (getnameinfo (res->ai_addr, res->ai_addrlen, hbuf, sizeof (hbuf), NULL, 0, niflags) != 0) strcpy (hbuf, "(invalid)"); printf ("Trying %s...\r\n", hbuf); } net = socket (res->ai_family, res->ai_socktype, res->ai_protocol); if (net < 0) continue; if (aliasp) { struct addrinfo ahints, *ares; memset (&ahints, 0, sizeof (ahints)); ahints.ai_family = PF_UNSPEC; ahints.ai_socktype = SOCK_STREAM; ahints.ai_flags = AI_PASSIVE; error = getaddrinfo (aliasp, "0", &ahints, &ares); if (error) { warn ("%s: %s", aliasp, gai_strerror (error)); close (net); freeaddrinfo (ares); continue; } if (bind (net, ares->ai_addr, ares->ai_addrlen) < 0) { perror (aliasp); close (net); /* dump descriptor */ return 0; } freeaddrinfo (ares); } #if defined(IP_OPTIONS) && defined(IPPROTO_IP) if (srp && res->ai_family == AF_INET && setsockopt (net, IPPROTO_IP, IP_OPTIONS, (char *) srp, srlen) < 0) perror ("setsockopt (IP_OPTIONS)"); #endif #if defined(IPPROTO_IP) && defined(IP_TOS) if (res->ai_family == AF_INET) { # if defined(HAS_GETTOS) struct tosent *tp; if (tos < 0 && (tp = gettosbyname ("telnet", "tcp"))) tos = tp->t_tos; # endif if (tos < 0) tos = IPTOS_LOWDELAY; /* Low Delay bit */ if (tos && (setsockopt (net, IPPROTO_IP, IP_TOS, (void *) &tos, sizeof (int)) < 0) && (errno != ENOPROTOOPT)) perror ("telnet: setsockopt (IP_TOS) (ignored)"); } #endif /* defined(IPPROTO_IP) && defined(IP_TOS) */ if (debug && SetSockOpt (net, SOL_SOCKET, SO_DEBUG, 1) < 0) { perror ("setsockopt (SO_DEBUG)"); } if (connect (net, res->ai_addr, res->ai_addrlen) < 0) { char hbuf[NI_MAXHOST]; if (getnameinfo (res->ai_addr, res->ai_addrlen, hbuf, sizeof (hbuf), NULL, 0, niflags) != 0) strcpy (hbuf, "(invalid)"); fprintf (stderr, "telnet: connect to address %s: %s\n", hbuf, strerror (errno)); close (net); net = -1; retry++; continue; } connected++; #if defined(AUTHENTICATION) || defined(ENCRYPTION) auth_encrypt_connect (connected); #endif /* defined(AUTHENTICATION) */ break; } freeaddrinfo (res0); if (net < 0) { return 0; } cmdrc (hostp, hostname); if (autologin && user == NULL) { struct passwd *pw; user = getenv ("USER"); if (user == NULL || ((pw = getpwnam (user)) && pw->pw_uid != getuid ())) { if ((pw = getpwuid (getuid ())) != NULL) user = pw->pw_name; else user = NULL; } } if (user) { env_define ((unsigned char *) "USER", (unsigned char *) user); env_export ((unsigned char *) "USER"); } call (status, "status", "notmuch", 0); if (sigsetjmp (peerdied, 1) == 0) telnet (user); NetClose (net); ExitString ("Connection closed by foreign host.\r\n", 1); /*NOTREACHED*/ return 0; } #define HELPINDENT (sizeof ("connect")) static char openhelp[] = "connect to a site", closehelp[] = "close current connection", logouthelp[] = "forcibly logout remote user and close the connection", quithelp[] = "exit telnet", statushelp[] = "print status information", helphelp[] = "print help information", sendhelp[] = "transmit special characters ('send ?' for more)", sethelp[] = "set operating parameters ('set ?' for more)", unsethelp[] = "unset operating parameters ('unset ?' for more)", togglestring[] = "toggle operating parameters ('toggle ?' for more)", slchelp[] = "change state of special charaters ('slc ?' for more)", displayhelp[] = "display operating parameters", #if defined(TN3270) && defined(unix) transcomhelp[] = "specify Unix command for transparent mode pipe", #endif /* defined(TN3270) && defined(unix) */ #if defined(AUTHENTICATION) authhelp[] = "turn on (off) authentication ('auth ?' for more)", #endif #if defined(ENCRYPTION) encrypthelp[] = "turn on (off) encryption ('encrypt ?' for more)", #endif zhelp[] = "suspend telnet", #ifdef SKEY skeyhelp[] = "compute response to s/key challenge", #endif shellhelp[] = "invoke a subshell", envhelp[] = "change environment variables ('environ ?' for more)", modestring[] = "try to enter line or character mode ('mode ?' for more)"; static int help __P ((int, char **)); static Command cmdtab[] = { {"close", closehelp, bye, 1}, {"logout", logouthelp, logout, 1}, {"display", displayhelp, display, 0}, {"mode", modestring, modecmd, 0}, {"open", openhelp, tn, 0}, {"quit", quithelp, (cmd_handler_t) quit, 0}, {"send", sendhelp, sendcmd, 0}, {"set", sethelp, setcmd, 0}, {"unset", unsethelp, unsetcmd, 0}, {"status", statushelp, status, 0}, {"toggle", togglestring, toggle, 0}, {"slc", slchelp, slccmd, 0}, #if defined(TN3270) && defined(unix) {"transcom", transcomhelp, settranscom, 0}, #endif /* defined(TN3270) && defined(unix) */ #if defined(AUTHENTICATION) {"auth", authhelp, auth_cmd, 0}, #endif #if defined(ENCRYPTION) {"encrypt", encrypthelp, encrypt_cmd, 0}, #endif {"z", zhelp, telnetsuspend, 0}, #if defined(TN3270) {"!", shellhelp, shell, 1}, #else {"!", shellhelp, shell, 0}, #endif {"environ", envhelp, env_cmd, 0}, {"?", helphelp, help, 0}, #if defined(SKEY) {"skey", skeyhelp, skey_calc, 0}, #endif {0, 0, 0, 0} }; static char crmodhelp[] = "deprecated command -- use 'toggle crmod' instead"; static char escapehelp[] = "deprecated command -- use 'set escape' instead"; static Command cmdtab2[] = { {"help", 0, help, 0}, {"escape", escapehelp, setescape, 0}, {"crmod", crmodhelp, togcrmod, 0}, {0, 0, 0, 0} }; /* * Call routine with argc, argv set from args (terminated by 0). */ /*VARARGS1 */ static int call (intrtn_t routine, ...) { va_list ap; char *args[100]; int argno = 0; va_start (ap, routine); while ((args[argno++] = va_arg (ap, char *)) != 0); va_end (ap); return (*routine) (argno - 1, args); } static Command * getcmd (char *name) { Command *cm; if ((cm = (Command *) genget (name, (char **) cmdtab, sizeof (Command)))) return cm; return (Command *) genget (name, (char **) cmdtab2, sizeof (Command)); } void command (int top, char *tbuf, int cnt) { Command *c; setcommandmode (); if (!top) { putchar ('\n'); } else { (void) signal (SIGINT, SIG_DFL); (void) signal (SIGQUIT, SIG_DFL); } for (;;) { if (rlogin == _POSIX_VDISABLE) printf ("%s> ", prompt); if (tbuf) { char *cp; cp = line; while (cnt > 0 && (*cp++ = *tbuf++) != '\n') cnt--; tbuf = 0; if (cp == line || *--cp != '\n' || cp == line) goto getline; *cp = '\0'; if (rlogin == _POSIX_VDISABLE) printf ("%s\r\n", line); } else { getline: if (rlogin != _POSIX_VDISABLE) printf ("%s> ", prompt); if (fgets (line, sizeof (line), stdin) == NULL) { if (feof (stdin) || ferror (stdin)) { (void) quit (); /*NOTREACHED*/} break; } } if (line[0] == 0) break; makeargv (); if (margv[0] == 0) { break; } c = getcmd (margv[0]); if (Ambiguous (c)) { printf ("?Ambiguous command\r\n"); continue; } if (c == 0) { printf ("?Invalid command\r\n"); continue; } if (c->needconnect && !connected) { printf ("?Need to be connected first.\r\n"); continue; } if ((*c->handler) (margc, margv)) { break; } } if (!top) { if (!connected) { siglongjmp (toplevel, 1); /*NOTREACHED*/} #if defined(TN3270) if (shell_active == 0) { setconnmode (0); } #else /* defined(TN3270) */ setconnmode (0); #endif /* defined(TN3270) */ } } /* * Help command. */ static int help (int argc, char *argv[]) { Command *c; if (argc == 1) { printf ("Commands may be abbreviated. Commands are:\r\n\r\n"); for (c = cmdtab; c->name; c++) if (c->help) { printf ("%-*s\t%s\r\n", (int)HELPINDENT, c->name, c->help); } return 0; } while (--argc > 0) { char *arg; arg = *++argv; c = getcmd (arg); if (Ambiguous (c)) printf ("?Ambiguous help command %s\r\n", arg); else if (c == (Command *) 0) printf ("?Invalid help command %s\r\n", arg); else printf ("%s\r\n", c->help); } return 0; } #if defined(IP_OPTIONS) && defined(IPPROTO_IP) /* * Source route is handed in as * [!]@hop1@hop2...[@|:]dst * If the leading ! is present, it is a * strict source route, otherwise it is * assmed to be a loose source route. * * We fill in the source route option as * hop1,hop2,hop3...dest * and return a pointer to hop1, which will * be the address to connect() to. * * Arguments: * arg: pointer to route list to decipher * * cpp: If *cpp is not equal to NULL, this is a * pointer to a pointer to a character array * that should be filled in with the option. * * lenp: pointer to an integer that contains the * length of *cpp if *cpp != NULL. * * Return values: * * Returns the address of the host to connect to. If the * return value is -1, there was a syntax error in the * option, either unknown characters, or too many hosts. * If the return value is 0, one of the hostnames in the * path is unknown, and *cpp is set to point to the bad * hostname. * * *cpp: If *cpp was equal to NULL, it will be filled * in with a pointer to our static area that has * the option filled in. This will be 32bit aligned. * * *lenp: This will be filled in with how long the option * pointed to by *cpp is. * */ unsigned long sourceroute (char *arg, char **cpp, int *lenp) { static char lsr[44]; #ifdef sysV88 static IOPTN ipopt; #endif char *cp, *cp2, *lsrp, *lsrep; int tmp; struct in_addr sin_addr; struct hostent *host = 0; char c; /* * Verify the arguments, and make sure we have * at least 7 bytes for the option. */ if (cpp == NULL || lenp == NULL) return ((unsigned long) -1); if (*cpp != NULL && *lenp < 7) return ((unsigned long) -1); /* * Decide whether we have a buffer passed to us, * or if we need to use our own static buffer. */ if (*cpp) { lsrp = *cpp; lsrep = lsrp + *lenp; } else { *cpp = lsrp = lsr; lsrep = lsrp + 44; } cp = arg; /* * Next, decide whether we have a loose source * route or a strict source route, and fill in * the begining of the option. */ #ifndef sysV88 if (*cp == '!') { cp++; *lsrp++ = IPOPT_SSRR; } else *lsrp++ = IPOPT_LSRR; #else if (*cp == '!') { cp++; ipopt.io_type = IPOPT_SSRR; } else ipopt.io_type = IPOPT_LSRR; #endif if (*cp != '@') return ((unsigned long) -1); #ifndef sysV88 lsrp++; /* skip over length, we'll fill it in later */ *lsrp++ = 4; #endif cp++; sin_addr.s_addr = 0; for (c = 0;;) { if (c == ':') cp2 = 0; else for (cp2 = cp; (c = *cp2); cp2++) { if (c == ',') { *cp2++ = '\0'; if (*cp2 == '@') cp2++; } else if (c == '@') { *cp2++ = '\0'; } else if (c == ':') { *cp2++ = '\0'; } else continue; break; } if (!c) cp2 = 0; if ((tmp = inet_addr (cp)) != -1) { sin_addr.s_addr = tmp; } else if ((host = gethostbyname (cp))) { #if defined(h_addr) memmove ((caddr_t) & sin_addr, host->h_addr_list[0], sizeof (sin_addr)); #else memmove ((caddr_t) & sin_addr, host->h_addr, sizeof (sin_addr)); #endif } else { *cpp = cp; return (0); } memmove (lsrp, (char *) &sin_addr, 4); lsrp += 4; if (cp2) cp = cp2; else break; /* * Check to make sure there is space for next address */ if (lsrp + 4 > lsrep) return ((unsigned long) -1); } #ifndef sysV88 if ((*(*cpp + IPOPT_OLEN) = lsrp - *cpp) <= 7) { *cpp = 0; *lenp = 0; return ((unsigned long) -1); } *lsrp++ = IPOPT_NOP; /* 32 bit word align it */ *lenp = lsrp - *cpp; #else ipopt.io_len = lsrp - *cpp; if (ipopt.io_len <= 5) { /* Is 3 better ? */ *cpp = 0; *lenp = 0; return ((unsigned long) -1); } *lenp = sizeof (ipopt); *cpp = (char *) &ipopt; #endif return (sin_addr.s_addr); } #endif