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Add ifmedia(4) reference.
[dragonfly/netmp.git] / usr.bin / telnet / commands.c
blobc6eafbc8880bc0f281dee2bea8f489bcfab07449
1 /*
2 * Copyright (c) 1988, 1990, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)commands.c 8.4 (Berkeley) 5/30/95
34 * $FreeBSD: src/usr.bin/telnet/commands.c,v 1.21.2.6 2002/11/30 05:35:13 eric Exp $
35 * $DragonFly: src/usr.bin/telnet/commands.c,v 1.6 2007/05/18 17:05:12 dillon Exp $
36 */
37
38 #include <sys/param.h>
39 #include <sys/un.h>
40 #include <sys/file.h>
41 #include <sys/socket.h>
42 #include <netinet/in.h>
43
44 #include <ctype.h>
45 #include <err.h>
46 #include <errno.h>
47 #include <netdb.h>
48 #include <pwd.h>
49 #include <signal.h>
50 #include <stdarg.h>
51 #include <stdlib.h>
52 #include <string.h>
53 #include <unistd.h>
54
55 #include <arpa/telnet.h>
56 #include <arpa/inet.h>
57
58 #include "general.h"
59
60 #include "ring.h"
61
62 #include "externs.h"
63 #include "defines.h"
64 #include "types.h"
65 #include "misc.h"
66
67
68 #include <netinet/in_systm.h>
69 #include <netinet/ip.h>
70 #include <netinet/ip6.h>
71
72 #ifndef MAXHOSTNAMELEN
73 #define MAXHOSTNAMELEN 256
74 #endif
75
76 typedef int (*intrtn_t)(int, char **);
77
78 #if defined(IPPROTO_IP) && defined(IP_TOS)
79 int tos = -1;
80 #endif /* defined(IPPROTO_IP) && defined(IP_TOS) */
81
82 char *hostname;
83 static char _hostname[MAXHOSTNAMELEN];
84
85 static int help(int, char **);
86 static int call(intrtn_t, ...);
87 static void cmdrc(char *, char *);
88 #ifdef INET6
89 static int switch_af(struct addrinfo **);
90 #endif
91 static int togglehelp(void);
92 static int send_tncmd(void (*)(int, int), const char *, char *);
93 static int setmod(int);
94 static int clearmode(int);
95 static int modehelp(void);
96 static int sourceroute(struct addrinfo *, char *, char **, int *, int *, int *);
97
98 typedef struct {
99 const char *name; /* command name */
100 const char *help; /* help string (NULL for no help) */
101 int (*handler)(int, char **); /* routine which executes command */
102 int needconnect; /* Do we need to be connected to execute? */
103 } Command;
104
105 static char line[256];
106 static char saveline[256];
107 static int margc;
108 static char *margv[20];
109
110 #ifdef OPIE
111 #include <sys/wait.h>
112 #define PATH_OPIEKEY "/usr/bin/opiekey"
113 static int
114 opie_calc(int argc, char *argv[])
115 {
116 int status;
117
118 if(argc != 3) {
119 printf("%s sequence challenge\n", argv[0]);
120 return (0);
121 }
122
123 switch(fork()) {
124 case 0:
125 execv(PATH_OPIEKEY, argv);
126 exit (1);
127 case -1:
128 perror("fork");
129 break;
130 default:
131 (void) wait(&status);
132 if (WIFEXITED(status))
133 return (WEXITSTATUS(status));
134 }
135 return (0);
136 }
137 #endif
138
139 static void
140 makeargv(void)
141 {
142 char *cp, *cp2, c;
143 char **argp = margv;
144
145 margc = 0;
146 cp = line;
147 if (*cp == '!') { /* Special case shell escape */
148 strcpy(saveline, line); /* save for shell command */
149 *argp++ = strdup("!"); /* No room in string to get this */
150 margc++;
151 cp++;
152 }
153 while ((c = *cp)) {
154 int inquote = 0;
155 while (isspace(c))
156 c = *++cp;
157 if (c == '\0')
158 break;
159 *argp++ = cp;
160 margc += 1;
161 for (cp2 = cp; c != '\0'; c = *++cp) {
162 if (inquote) {
163 if (c == inquote) {
164 inquote = 0;
165 continue;
166 }
167 } else {
168 if (c == '\\') {
169 if ((c = *++cp) == '\0')
170 break;
171 } else if (c == '"') {
172 inquote = '"';
173 continue;
174 } else if (c == '\'') {
175 inquote = '\'';
176 continue;
177 } else if (isspace(c))
178 break;
179 }
180 *cp2++ = c;
181 }
182 *cp2 = '\0';
183 if (c == '\0')
184 break;
185 cp++;
186 }
187 *argp++ = 0;
188 }
189
190 /*
191 * Make a character string into a number.
192 *
193 * Todo: 1. Could take random integers (12, 0x12, 012, 0b1).
194 */
195
196 static int
197 special(char *s)
198 {
199 char c;
200 char b;
201
202 switch (*s) {
203 case '^':
204 b = *++s;
205 if (b == '?') {
206 c = b | 0x40; /* DEL */
207 } else {
208 c = b & 0x1f;
209 }
210 break;
211 default:
212 c = *s;
213 break;
214 }
215 return c;
216 }
217
218 /*
219 * Construct a control character sequence
220 * for a special character.
221 */
222 static const char *
223 control(cc_t c)
224 {
225 static char buf[5];
226 /*
227 * The only way I could get the Sun 3.5 compiler
228 * to shut up about
229 * if ((unsigned int)c >= 0x80)
230 * was to assign "c" to an unsigned int variable...
231 * Arggg....
232 */
233 unsigned int uic = (unsigned int)c;
234
235 if (uic == 0x7f)
236 return ("^?");
237 if (c == (cc_t)_POSIX_VDISABLE) {
238 return "off";
239 }
240 if (uic >= 0x80) {
241 buf[0] = '\\';
242 buf[1] = ((c>>6)&07) + '0';
243 buf[2] = ((c>>3)&07) + '0';
244 buf[3] = (c&07) + '0';
245 buf[4] = 0;
246 } else if (uic >= 0x20) {
247 buf[0] = c;
248 buf[1] = 0;
249 } else {
250 buf[0] = '^';
251 buf[1] = '@'+c;
252 buf[2] = 0;
253 }
254 return (buf);
255 }
256
257 /*
258 * The following are data structures and routines for
259 * the "send" command.
260 *
261 */
262
263 struct sendlist {
264 const char *name; /* How user refers to it (case independent) */
265 const char *help; /* Help information (0 ==> no help) */
266 int needconnect; /* Need to be connected */
267 int narg; /* Number of arguments */
268 int (*handler)(char *, ...); /* Routine to perform (for special ops) */
269 int nbyte; /* Number of bytes to send this command */
270 int what; /* Character to be sent (<0 ==> special) */
271 };
272 \f
273
274 static int
275 send_esc(void),
276 send_help(void),
277 send_docmd(char *),
278 send_dontcmd(char *),
279 send_willcmd(char *),
280 send_wontcmd(char *);
281
282 static struct sendlist Sendlist[] = {
283 { "ao", "Send Telnet Abort output", 1, 0, NULL, 2, AO },
284 { "ayt", "Send Telnet 'Are You There'", 1, 0, NULL, 2, AYT },
285 { "brk", "Send Telnet Break", 1, 0, NULL, 2, BREAK },
286 { "break", NULL, 1, 0, NULL, 2, BREAK },
287 { "ec", "Send Telnet Erase Character", 1, 0, NULL, 2, EC },
288 { "el", "Send Telnet Erase Line", 1, 0, NULL, 2, EL },
289 { "escape", "Send current escape character",1, 0, (int (*)(char *, ...))send_esc, 1, 0 },
290 { "ga", "Send Telnet 'Go Ahead' sequence", 1, 0, NULL, 2, GA },
291 { "ip", "Send Telnet Interrupt Process",1, 0, NULL, 2, IP },
292 { "intp", NULL, 1, 0, NULL, 2, IP },
293 { "interrupt", NULL, 1, 0, NULL, 2, IP },
294 { "intr", NULL, 1, 0, NULL, 2, IP },
295 { "nop", "Send Telnet 'No operation'", 1, 0, NULL, 2, NOP },
296 { "eor", "Send Telnet 'End of Record'", 1, 0, NULL, 2, EOR },
297 { "abort", "Send Telnet 'Abort Process'", 1, 0, NULL, 2, ABORT },
298 { "susp", "Send Telnet 'Suspend Process'",1, 0, NULL, 2, SUSP },
299 { "eof", "Send Telnet End of File Character", 1, 0, NULL, 2, xEOF },
300 { "synch", "Perform Telnet 'Synch operation'", 1, 0, (int (*)(char *, ...))dosynch, 2, 0 },
301 { "getstatus", "Send request for STATUS", 1, 0, (int (*)(char *, ...))get_status, 6, 0 },
302 { "?", "Display send options", 0, 0, (int (*)(char *, ...))send_help, 0, 0 },
303 { "help", NULL, 0, 0, (int (*)(char *, ...))send_help, 0, 0 },
304 { "do", NULL, 0, 1, (int (*)(char *, ...))send_docmd, 3, 0 },
305 { "dont", NULL, 0, 1, (int (*)(char *, ...))send_dontcmd, 3, 0 },
306 { "will", NULL, 0, 1, (int (*)(char *, ...))send_willcmd, 3, 0 },
307 { "wont", NULL, 0, 1, (int (*)(char *, ...))send_wontcmd, 3, 0 },
308 { NULL, NULL, 0, 0, NULL, 0, 0 }
309 };
310
311 #define GETSEND(name) ((struct sendlist *) genget(name, (char **) Sendlist, \
312 sizeof(struct sendlist)))
313
314 static int
315 sendcmd(int argc, char *argv[])
316 {
317 int count; /* how many bytes we are going to need to send */
318 int i;
319 struct sendlist *s; /* pointer to current command */
320 int success = 0;
321 int needconnect = 0;
322
323 if (argc < 2) {
324 printf("need at least one argument for 'send' command\n");
325 printf("'send ?' for help\n");
326 return 0;
327 }
328 /*
329 * First, validate all the send arguments.
330 * In addition, we see how much space we are going to need, and
331 * whether or not we will be doing a "SYNCH" operation (which
332 * flushes the network queue).
333 */
334 count = 0;
335 for (i = 1; i < argc; i++) {
336 s = GETSEND(argv[i]);
337 if (s == 0) {
338 printf("Unknown send argument '%s'\n'send ?' for help.\n",
339 argv[i]);
340 return 0;
341 } else if (Ambiguous((void *)s)) {
342 printf("Ambiguous send argument '%s'\n'send ?' for help.\n",
343 argv[i]);
344 return 0;
345 }
346 if (i + s->narg >= argc) {
347 fprintf(stderr,
348 "Need %d argument%s to 'send %s' command. 'send %s ?' for help.\n",
349 s->narg, s->narg == 1 ? "" : "s", s->name, s->name);
350 return 0;
351 }
352 count += s->nbyte;
353 if ((void *)s->handler == (void *)send_help) {
354 send_help();
355 return 0;
356 }
357
358 i += s->narg;
359 needconnect += s->needconnect;
360 }
361 if (!connected && needconnect) {
362 printf("?Need to be connected first.\n");
363 printf("'send ?' for help\n");
364 return 0;
365 }
366 /* Now, do we have enough room? */
367 if (NETROOM() < count) {
368 printf("There is not enough room in the buffer TO the network\n");
369 printf("to process your request. Nothing will be done.\n");
370 printf("('send synch' will throw away most data in the network\n");
371 printf("buffer, if this might help.)\n");
372 return 0;
373 }
374 /* OK, they are all OK, now go through again and actually send */
375 count = 0;
376 for (i = 1; i < argc; i++) {
377 if ((s = GETSEND(argv[i])) == 0) {
378 fprintf(stderr, "Telnet 'send' error - argument disappeared!\n");
379 quit();
380 /*NOTREACHED*/
381 }
382 if (s->handler) {
383 count++;
384 success += (*s->handler)((s->narg > 0) ? argv[i+1] : 0,
385 (s->narg > 1) ? argv[i+2] : 0);
386 i += s->narg;
387 } else {
388 NET2ADD(IAC, s->what);
389 printoption("SENT", IAC, s->what);
390 }
391 }
392 return (count == success);
393 }
394
395 static int
396 send_esc(void)
397 {
398 NETADD(escape);
399 return 1;
400 }
401
402 static int
403 send_docmd(char *name)
404 {
405 return(send_tncmd(send_do, "do", name));
406 }
407
408 static int
409 send_dontcmd(char *name)
410 {
411 return(send_tncmd(send_dont, "dont", name));
412 }
413
414 static int
415 send_willcmd(char *name)
416 {
417 return(send_tncmd(send_will, "will", name));
418 }
419
420 static int
421 send_wontcmd(char *name)
422 {
423 return(send_tncmd(send_wont, "wont", name));
424 }
425
426 static int
427 send_tncmd(void (*func)(int, int), const char *cmd, char *name)
428 {
429 char **cpp;
430 extern char *telopts[];
431 int val = 0;
432
433 if (isprefix(name, "help") || isprefix(name, "?")) {
434 int col, len;
435
436 printf("Usage: send %s <value|option>\n", cmd);
437 printf("\"value\" must be from 0 to 255\n");
438 printf("Valid options are:\n\t");
439
440 col = 8;
441 for (cpp = telopts; *cpp; cpp++) {
442 len = strlen(*cpp) + 3;
443 if (col + len > 65) {
444 printf("\n\t");
445 col = 8;
446 }
447 printf(" \"%s\"", *cpp);
448 col += len;
449 }
450 printf("\n");
451 return 0;
452 }
453 cpp = (char **)genget(name, telopts, sizeof(char *));
454 if (Ambiguous(cpp)) {
455 fprintf(stderr,"'%s': ambiguous argument ('send %s ?' for help).\n",
456 name, cmd);
457 return 0;
458 }
459 if (cpp) {
460 val = cpp - telopts;
461 } else {
462 char *cp = name;
463
464 while (*cp >= '0' && *cp <= '9') {
465 val *= 10;
466 val += *cp - '0';
467 cp++;
468 }
469 if (*cp != 0) {
470 fprintf(stderr, "'%s': unknown argument ('send %s ?' for help).\n",
471 name, cmd);
472 return 0;
473 } else if (val < 0 || val > 255) {
474 fprintf(stderr, "'%s': bad value ('send %s ?' for help).\n",
475 name, cmd);
476 return 0;
477 }
478 }
479 if (!connected) {
480 printf("?Need to be connected first.\n");
481 return 0;
482 }
483 (*func)(val, 1);
484 return 1;
485 }
486
487 static int
488 send_help(void)
489 {
490 struct sendlist *s; /* pointer to current command */
491 for (s = Sendlist; s->name; s++) {
492 if (s->help)
493 printf("%-15s %s\n", s->name, s->help);
494 }
495 return(0);
496 }
497 \f
498 /*
499 * The following are the routines and data structures referred
500 * to by the arguments to the "toggle" command.
501 */
502
503 static int
504 lclchars(void)
505 {
506 donelclchars = 1;
507 return 1;
508 }
509
510 static int
511 togdebug(void)
512 {
513 #ifndef NOT43
514 if (net > 0 &&
515 (SetSockOpt(net, SOL_SOCKET, SO_DEBUG, debug)) < 0) {
516 perror("setsockopt (SO_DEBUG)");
517 }
518 #else /* NOT43 */
519 if (debug) {
520 if (net > 0 && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 1) < 0)
521 perror("setsockopt (SO_DEBUG)");
522 } else
523 printf("Cannot turn off socket debugging\n");
524 #endif /* NOT43 */
525 return 1;
526 }
527
528
529 static int
530 togcrlf(void)
531 {
532 if (crlf) {
533 printf("Will send carriage returns as telnet <CR><LF>.\n");
534 } else {
535 printf("Will send carriage returns as telnet <CR><NUL>.\n");
536 }
537 return 1;
538 }
539
540 int binmode;
541
542 static int
543 togbinary(int val)
544 {
545 donebinarytoggle = 1;
546
547 if (val >= 0) {
548 binmode = val;
549 } else {
550 if (my_want_state_is_will(TELOPT_BINARY) &&
551 my_want_state_is_do(TELOPT_BINARY)) {
552 binmode = 1;
553 } else if (my_want_state_is_wont(TELOPT_BINARY) &&
554 my_want_state_is_dont(TELOPT_BINARY)) {
555 binmode = 0;
556 }
557 val = binmode ? 0 : 1;
558 }
559
560 if (val == 1) {
561 if (my_want_state_is_will(TELOPT_BINARY) &&
562 my_want_state_is_do(TELOPT_BINARY)) {
563 printf("Already operating in binary mode with remote host.\n");
564 } else {
565 printf("Negotiating binary mode with remote host.\n");
566 tel_enter_binary(3);
567 }
568 } else {
569 if (my_want_state_is_wont(TELOPT_BINARY) &&
570 my_want_state_is_dont(TELOPT_BINARY)) {
571 printf("Already in network ascii mode with remote host.\n");
572 } else {
573 printf("Negotiating network ascii mode with remote host.\n");
574 tel_leave_binary(3);
575 }
576 }
577 return 1;
578 }
579
580 static int
581 togrbinary(int val)
582 {
583 donebinarytoggle = 1;
584
585 if (val == -1)
586 val = my_want_state_is_do(TELOPT_BINARY) ? 0 : 1;
587
588 if (val == 1) {
589 if (my_want_state_is_do(TELOPT_BINARY)) {
590 printf("Already receiving in binary mode.\n");
591 } else {
592 printf("Negotiating binary mode on input.\n");
593 tel_enter_binary(1);
594 }
595 } else {
596 if (my_want_state_is_dont(TELOPT_BINARY)) {
597 printf("Already receiving in network ascii mode.\n");
598 } else {
599 printf("Negotiating network ascii mode on input.\n");
600 tel_leave_binary(1);
601 }
602 }
603 return 1;
604 }
605
606 static int
607 togxbinary(int val)
608 {
609 donebinarytoggle = 1;
610
611 if (val == -1)
612 val = my_want_state_is_will(TELOPT_BINARY) ? 0 : 1;
613
614 if (val == 1) {
615 if (my_want_state_is_will(TELOPT_BINARY)) {
616 printf("Already transmitting in binary mode.\n");
617 } else {
618 printf("Negotiating binary mode on output.\n");
619 tel_enter_binary(2);
620 }
621 } else {
622 if (my_want_state_is_wont(TELOPT_BINARY)) {
623 printf("Already transmitting in network ascii mode.\n");
624 } else {
625 printf("Negotiating network ascii mode on output.\n");
626 tel_leave_binary(2);
627 }
628 }
629 return 1;
630 }
631
632 struct togglelist {
633 const char *name; /* name of toggle */
634 const char *help; /* help message */
635 int (*handler)(int); /* routine to do actual setting */
636 int *variable;
637 const char *actionexplanation;
638 };
639
640 static struct togglelist Togglelist[] = {
641 { "autoflush",
642 "flushing of output when sending interrupt characters",
643 0,
644 &autoflush,
645 "flush output when sending interrupt characters" },
646 { "autosynch",
647 "automatic sending of interrupt characters in urgent mode",
648 0,
649 &autosynch,
650 "send interrupt characters in urgent mode" },
651 { "skiprc",
652 "don't read ~/.telnetrc file",
653 0,
654 &skiprc,
655 "skip reading of ~/.telnetrc file" },
656 { "binary",
657 "sending and receiving of binary data",
658 togbinary,
659 0,
660 0 },
661 { "inbinary",
662 "receiving of binary data",
663 togrbinary,
664 0,
665 0 },
666 { "outbinary",
667 "sending of binary data",
668 togxbinary,
669 0,
670 0 },
671 { "crlf",
672 "sending carriage returns as telnet <CR><LF>",
673 (int (*)(int))togcrlf,
674 &crlf,
675 0 },
676 { "crmod",
677 "mapping of received carriage returns",
678 0,
679 &crmod,
680 "map carriage return on output" },
681 { "localchars",
682 "local recognition of certain control characters",
683 (int (*)(int))lclchars,
684 &localchars,
685 "recognize certain control characters" },
686 { " ", "", NULL, NULL, NULL }, /* empty line */
687 { "debug",
688 "debugging",
689 (int (*)(int))togdebug,
690 &debug,
691 "turn on socket level debugging" },
692 { "netdata",
693 "printing of hexadecimal network data (debugging)",
694 0,
695 &netdata,
696 "print hexadecimal representation of network traffic" },
697 { "prettydump",
698 "output of \"netdata\" to user readable format (debugging)",
699 0,
700 &prettydump,
701 "print user readable output for \"netdata\"" },
702 { "options",
703 "viewing of options processing (debugging)",
704 0,
705 &showoptions,
706 "show option processing" },
707 { "termdata",
708 "(debugging) toggle printing of hexadecimal terminal data",
709 0,
710 &termdata,
711 "print hexadecimal representation of terminal traffic" },
712 { "?",
713 NULL,
714 (int (*)(int))togglehelp,
715 NULL,
716 NULL },
717 { NULL, NULL, NULL, NULL, NULL },
718 { "help",
719 NULL,
720 (int (*)(int))togglehelp,
721 NULL,
722 NULL },
723 { NULL, NULL, NULL, NULL, NULL }
724 };
725
726 static int
727 togglehelp(void)
728 {
729 struct togglelist *c;
730
731 for (c = Togglelist; c->name; c++) {
732 if (c->help) {
733 if (*c->help)
734 printf("%-15s toggle %s\n", c->name, c->help);
735 else
736 printf("\n");
737 }
738 }
739 printf("\n");
740 printf("%-15s %s\n", "?", "display help information");
741 return 0;
742 }
743
744 static void
745 settogglehelp(int set)
746 {
747 struct togglelist *c;
748
749 for (c = Togglelist; c->name; c++) {
750 if (c->help) {
751 if (*c->help)
752 printf("%-15s %s %s\n", c->name, set ? "enable" : "disable",
753 c->help);
754 else
755 printf("\n");
756 }
757 }
758 }
759
760 #define GETTOGGLE(name) (struct togglelist *) \
761 genget(name, (char **) Togglelist, sizeof(struct togglelist))
762
763 static int
764 toggle(int argc, char *argv[])
765 {
766 int retval = 1;
767 char *name;
768 struct togglelist *c;
769
770 if (argc < 2) {
771 fprintf(stderr,
772 "Need an argument to 'toggle' command. 'toggle ?' for help.\n");
773 return 0;
774 }
775 argc--;
776 argv++;
777 while (argc--) {
778 name = *argv++;
779 c = GETTOGGLE(name);
780 if (Ambiguous((void *)c)) {
781 fprintf(stderr, "'%s': ambiguous argument ('toggle ?' for help).\n",
782 name);
783 return 0;
784 } else if (c == 0) {
785 fprintf(stderr, "'%s': unknown argument ('toggle ?' for help).\n",
786 name);
787 return 0;
788 } else {
789 if (c->variable) {
790 *c->variable = !*c->variable; /* invert it */
791 if (c->actionexplanation) {
792 printf("%s %s.\n", *c->variable? "Will" : "Won't",
793 c->actionexplanation);
794 }
795 }
796 if (c->handler) {
797 retval &= (*c->handler)(-1);
798 }
799 }
800 }
801 return retval;
802 }
803 \f
804 /*
805 * The following perform the "set" command.
806 */
807
808 #ifdef USE_TERMIO
809 struct termio new_tc = { 0, 0, 0, 0, {}, 0, 0 };
810 #endif
811
812 struct setlist {
813 const char *name; /* name */
814 const char *help; /* help information */
815 void (*handler)(char *);
816 cc_t *charp; /* where it is located at */
817 };
818
819 static struct setlist Setlist[] = {
820 #ifdef KLUDGELINEMODE
821 { "echo", "character to toggle local echoing on/off", NULL, &echoc },
822 #endif
823 { "escape", "character to escape back to telnet command mode", NULL, &escape },
824 { "rlogin", "rlogin escape character", 0, &rlogin },
825 { "tracefile", "file to write trace information to", SetNetTrace, (cc_t *)NetTraceFile},
826 { " ", "", NULL, NULL },
827 { " ", "The following need 'localchars' to be toggled true", NULL, NULL },
828 { "flushoutput", "character to cause an Abort Output", NULL, termFlushCharp },
829 { "interrupt", "character to cause an Interrupt Process", NULL, termIntCharp },
830 { "quit", "character to cause an Abort process", NULL, termQuitCharp },
831 { "eof", "character to cause an EOF ", NULL, termEofCharp },
832 { " ", "", NULL, NULL },
833 { " ", "The following are for local editing in linemode", NULL, NULL },
834 { "erase", "character to use to erase a character", NULL, termEraseCharp },
835 { "kill", "character to use to erase a line", NULL, termKillCharp },
836 { "lnext", "character to use for literal next", NULL, termLiteralNextCharp },
837 { "susp", "character to cause a Suspend Process", NULL, termSuspCharp },
838 { "reprint", "character to use for line reprint", NULL, termRprntCharp },
839 { "worderase", "character to use to erase a word", NULL, termWerasCharp },
840 { "start", "character to use for XON", NULL, termStartCharp },
841 { "stop", "character to use for XOFF", NULL, termStopCharp },
842 { "forw1", "alternate end of line character", NULL, termForw1Charp },
843 { "forw2", "alternate end of line character", NULL, termForw2Charp },
844 { "ayt", "alternate AYT character", NULL, termAytCharp },
845 { NULL, NULL, NULL, NULL }
846 };
847
848 static struct setlist *
849 getset(char *name)
850 {
851 return (struct setlist *)
852 genget(name, (char **) Setlist, sizeof(struct setlist));
853 }
854
855 void
856 set_escape_char(char *s)
857 {
858 if (rlogin != _POSIX_VDISABLE) {
859 rlogin = (s && *s) ? special(s) : _POSIX_VDISABLE;
860 printf("Telnet rlogin escape character is '%s'.\n",
861 control(rlogin));
862 } else {
863 escape = (s && *s) ? special(s) : _POSIX_VDISABLE;
864 printf("Telnet escape character is '%s'.\n", control(escape));
865 }
866 }
867
868 static int
869 setcmd(int argc, char *argv[])
870 {
871 int value;
872 struct setlist *ct;
873 struct togglelist *c;
874
875 if (argc < 2 || argc > 3) {
876 printf("Format is 'set Name Value'\n'set ?' for help.\n");
877 return 0;
878 }
879 if ((argc == 2) && (isprefix(argv[1], "?") || isprefix(argv[1], "help"))) {
880 for (ct = Setlist; ct->name; ct++)
881 printf("%-15s %s\n", ct->name, ct->help);
882 printf("\n");
883 settogglehelp(1);
884 printf("%-15s %s\n", "?", "display help information");
885 return 0;
886 }
887
888 ct = getset(argv[1]);
889 if (ct == 0) {
890 c = GETTOGGLE(argv[1]);
891 if (c == 0) {
892 fprintf(stderr, "'%s': unknown argument ('set ?' for help).\n",
893 argv[1]);
894 return 0;
895 } else if (Ambiguous((void *)c)) {
896 fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n",
897 argv[1]);
898 return 0;
899 }
900 if (c->variable) {
901 if ((argc == 2) || (strcmp("on", argv[2]) == 0))
902 *c->variable = 1;
903 else if (strcmp("off", argv[2]) == 0)
904 *c->variable = 0;
905 else {
906 printf("Format is 'set togglename [on|off]'\n'set ?' for help.\n");
907 return 0;
908 }
909 if (c->actionexplanation) {
910 printf("%s %s.\n", *c->variable? "Will" : "Won't",
911 c->actionexplanation);
912 }
913 }
914 if (c->handler)
915 (*c->handler)(1);
916 } else if (argc != 3) {
917 printf("Format is 'set Name Value'\n'set ?' for help.\n");
918 return 0;
919 } else if (Ambiguous((void *)ct)) {
920 fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n",
921 argv[1]);
922 return 0;
923 } else if (ct->handler) {
924 (*ct->handler)(argv[2]);
925 printf("%s set to \"%s\".\n", ct->name, (char *)ct->charp);
926 } else {
927 if (strcmp("off", argv[2])) {
928 value = special(argv[2]);
929 } else {
930 value = _POSIX_VDISABLE;
931 }
932 *(ct->charp) = (cc_t)value;
933 printf("%s character is '%s'.\n", ct->name, control(*(ct->charp)));
934 }
935 slc_check();
936 return 1;
937 }
938
939 static int
940 unsetcmd(int argc, char *argv[])
941 {
942 struct setlist *ct;
943 struct togglelist *c;
944 char *name;
945
946 if (argc < 2) {
947 fprintf(stderr,
948 "Need an argument to 'unset' command. 'unset ?' for help.\n");
949 return 0;
950 }
951 if (isprefix(argv[1], "?") || isprefix(argv[1], "help")) {
952 for (ct = Setlist; ct->name; ct++)
953 printf("%-15s %s\n", ct->name, ct->help);
954 printf("\n");
955 settogglehelp(0);
956 printf("%-15s %s\n", "?", "display help information");
957 return 0;
958 }
959
960 argc--;
961 argv++;
962 while (argc--) {
963 name = *argv++;
964 ct = getset(name);
965 if (ct == 0) {
966 c = GETTOGGLE(name);
967 if (c == 0) {
968 fprintf(stderr, "'%s': unknown argument ('unset ?' for help).\n",
969 name);
970 return 0;
971 } else if (Ambiguous((void *)c)) {
972 fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\n",
973 name);
974 return 0;
975 }
976 if (c->variable) {
977 *c->variable = 0;
978 if (c->actionexplanation) {
979 printf("%s %s.\n", *c->variable? "Will" : "Won't",
980 c->actionexplanation);
981 }
982 }
983 if (c->handler)
984 (*c->handler)(0);
985 } else if (Ambiguous((void *)ct)) {
986 fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\n",
987 name);
988 return 0;
989 } else if (ct->handler) {
990 (*ct->handler)(0);
991 printf("%s reset to \"%s\".\n", ct->name, (char *)ct->charp);
992 } else {
993 *(ct->charp) = _POSIX_VDISABLE;
994 printf("%s character is '%s'.\n", ct->name, control(*(ct->charp)));
995 }
996 }
997 return 1;
998 }
999 \f
1000 /*
1001 * The following are the data structures and routines for the
1002 * 'mode' command.
1003 */
1004 #ifdef KLUDGELINEMODE
1005 extern int kludgelinemode;
1006
1007 static int
1008 dokludgemode(void)
1009 {
1010 kludgelinemode = 1;
1011 send_wont(TELOPT_LINEMODE, 1);
1012 send_dont(TELOPT_SGA, 1);
1013 send_dont(TELOPT_ECHO, 1);
1014 return 1;
1015 }
1016 #endif
1017
1018 static int
1019 dolinemode(void)
1020 {
1021 #ifdef KLUDGELINEMODE
1022 if (kludgelinemode)
1023 send_dont(TELOPT_SGA, 1);
1024 #endif
1025 send_will(TELOPT_LINEMODE, 1);
1026 send_dont(TELOPT_ECHO, 1);
1027 return 1;
1028 }
1029
1030 static int
1031 docharmode(void)
1032 {
1033 #ifdef KLUDGELINEMODE
1034 if (kludgelinemode)
1035 send_do(TELOPT_SGA, 1);
1036 else
1037 #endif
1038 send_wont(TELOPT_LINEMODE, 1);
1039 send_do(TELOPT_ECHO, 1);
1040 return 1;
1041 }
1042
1043 static int
1044 dolmmode(int bit, int on)
1045 {
1046 unsigned char c;
1047 extern int linemode;
1048
1049 if (my_want_state_is_wont(TELOPT_LINEMODE)) {
1050 printf("?Need to have LINEMODE option enabled first.\n");
1051 printf("'mode ?' for help.\n");
1052 return 0;
1053 }
1054
1055 if (on)
1056 c = (linemode | bit);
1057 else
1058 c = (linemode & ~bit);
1059 lm_mode(&c, 1, 1);
1060 return 1;
1061 }
1062
1063 static int
1064 setmod(int bit)
1065 {
1066 return dolmmode(bit, 1);
1067 }
1068
1069 static int
1070 clearmode(int bit)
1071 {
1072 return dolmmode(bit, 0);
1073 }
1074
1075 struct modelist {
1076 const char *name; /* command name */
1077 const char *help; /* help string */
1078 int (*handler)(int);/* routine which executes command */
1079 int needconnect; /* Do we need to be connected to execute? */
1080 int arg1;
1081 };
1082
1083 static struct modelist ModeList[] = {
1084 { "character", "Disable LINEMODE option", (int (*)(int))docharmode, 1, 0 },
1085 #ifdef KLUDGELINEMODE
1086 { "", "(or disable obsolete line-by-line mode)", NULL, 0, 0 },
1087 #endif
1088 { "line", "Enable LINEMODE option", (int (*)(int))dolinemode, 1, 0 },
1089 #ifdef KLUDGELINEMODE
1090 { "", "(or enable obsolete line-by-line mode)", NULL, 0, 0 },
1091 #endif
1092 { "", "", NULL, 0, 0 },
1093 { "", "These require the LINEMODE option to be enabled", NULL, 0, 0 },
1094 { "isig", "Enable signal trapping", setmod, 1, MODE_TRAPSIG },
1095 { "+isig", 0, setmod, 1, MODE_TRAPSIG },
1096 { "-isig", "Disable signal trapping", clearmode, 1, MODE_TRAPSIG },
1097 { "edit", "Enable character editing", setmod, 1, MODE_EDIT },
1098 { "+edit", 0, setmod, 1, MODE_EDIT },
1099 { "-edit", "Disable character editing", clearmode, 1, MODE_EDIT },
1100 { "softtabs", "Enable tab expansion", setmod, 1, MODE_SOFT_TAB },
1101 { "+softtabs", 0, setmod, 1, MODE_SOFT_TAB },
1102 { "-softtabs", "Disable character editing", clearmode, 1, MODE_SOFT_TAB },
1103 { "litecho", "Enable literal character echo", setmod, 1, MODE_LIT_ECHO },
1104 { "+litecho", 0, setmod, 1, MODE_LIT_ECHO },
1105 { "-litecho", "Disable literal character echo", clearmode, 1, MODE_LIT_ECHO },
1106 { "help", 0, (int (*)(int))modehelp, 0, 0 },
1107 #ifdef KLUDGELINEMODE
1108 { "kludgeline", 0, (int (*)(int))dokludgemode, 1, 0 },
1109 #endif
1110 { "", "", NULL, 0, 0 },
1111 { "?", "Print help information", (int (*)(int))modehelp, 0, 0 },
1112 { NULL, NULL, NULL, 0, 0 },
1113 };
1114
1115
1116 static int
1117 modehelp(void)
1118 {
1119 struct modelist *mt;
1120
1121 printf("format is: 'mode Mode', where 'Mode' is one of:\n\n");
1122 for (mt = ModeList; mt->name; mt++) {
1123 if (mt->help) {
1124 if (*mt->help)
1125 printf("%-15s %s\n", mt->name, mt->help);
1126 else
1127 printf("\n");
1128 }
1129 }
1130 return 0;
1131 }
1132
1133 #define GETMODECMD(name) (struct modelist *) \
1134 genget(name, (char **) ModeList, sizeof(struct modelist))
1135
1136 static int
1137 modecmd(int argc, char *argv[])
1138 {
1139 struct modelist *mt;
1140
1141 if (argc != 2) {
1142 printf("'mode' command requires an argument\n");
1143 printf("'mode ?' for help.\n");
1144 } else if ((mt = GETMODECMD(argv[1])) == 0) {
1145 fprintf(stderr, "Unknown mode '%s' ('mode ?' for help).\n", argv[1]);
1146 } else if (Ambiguous((void *)mt)) {
1147 fprintf(stderr, "Ambiguous mode '%s' ('mode ?' for help).\n", argv[1]);
1148 } else if (mt->needconnect && !connected) {
1149 printf("?Need to be connected first.\n");
1150 printf("'mode ?' for help.\n");
1151 } else if (mt->handler) {
1152 return (*mt->handler)(mt->arg1);
1153 }
1154 return 0;
1155 }
1156 \f
1157 /*
1158 * The following data structures and routines implement the
1159 * "display" command.
1160 */
1161
1162 static int
1163 display(int argc, char *argv[])
1164 {
1165 struct togglelist *tl;
1166 struct setlist *sl;
1167
1168 #define dotog(tl) if (tl->variable && tl->actionexplanation) { \
1169 if (*tl->variable) { \
1170 printf("will"); \
1171 } else { \
1172 printf("won't"); \
1173 } \
1174 printf(" %s.\n", tl->actionexplanation); \
1175 }
1176
1177 #define doset(sl) if (sl->name && *sl->name != ' ') { \
1178 if (sl->handler == 0) \
1179 printf("%-15s [%s]\n", sl->name, control(*sl->charp)); \
1180 else \
1181 printf("%-15s \"%s\"\n", sl->name, (char *)sl->charp); \
1182 }
1183
1184 if (argc == 1) {
1185 for (tl = Togglelist; tl->name; tl++) {
1186 dotog(tl);
1187 }
1188 printf("\n");
1189 for (sl = Setlist; sl->name; sl++) {
1190 doset(sl);
1191 }
1192 } else {
1193 int i;
1194
1195 for (i = 1; i < argc; i++) {
1196 sl = getset(argv[i]);
1197 tl = GETTOGGLE(argv[i]);
1198 if (Ambiguous((void *)sl) || Ambiguous((void *)tl)) {
1199 printf("?Ambiguous argument '%s'.\n", argv[i]);
1200 return 0;
1201 } else if (!sl && !tl) {
1202 printf("?Unknown argument '%s'.\n", argv[i]);
1203 return 0;
1204 } else {
1205 if (tl) {
1206 dotog(tl);
1207 }
1208 if (sl) {
1209 doset(sl);
1210 }
1211 }
1212 }
1213 }
1214 /*@*/optionstatus();
1215 return 1;
1216 #undef doset
1217 #undef dotog
1218 }
1219 \f
1220 /*
1221 * The following are the data structures, and many of the routines,
1222 * relating to command processing.
1223 */
1224
1225 /*
1226 * Set the escape character.
1227 */
1228 static int
1229 setescape(int argc, char *argv[])
1230 {
1231 char *arg;
1232 char buf[50];
1233
1234 printf(
1235 "Deprecated usage - please use 'set escape%s%s' in the future.\n",
1236 (argc > 2)? " ":"", (argc > 2)? argv[1]: "");
1237 if (argc > 2)
1238 arg = argv[1];
1239 else {
1240 printf("new escape character: ");
1241 (void) fgets(buf, sizeof(buf), stdin);
1242 arg = buf;
1243 }
1244 if (arg[0] != '\0')
1245 escape = arg[0];
1246 (void) fflush(stdout);
1247 return 1;
1248 }
1249
1250 static int
1251 togcrmod(void)
1252 {
1253 crmod = !crmod;
1254 printf("Deprecated usage - please use 'toggle crmod' in the future.\n");
1255 printf("%s map carriage return on output.\n", crmod ? "Will" : "Won't");
1256 (void) fflush(stdout);
1257 return 1;
1258 }
1259
1260 static int
1261 suspend(void)
1262 {
1263 #ifdef SIGTSTP
1264 setcommandmode();
1265 {
1266 long oldrows, oldcols, newrows, newcols, err_;
1267
1268 err_ = (TerminalWindowSize(&oldrows, &oldcols) == 0) ? 1 : 0;
1269 (void) kill(0, SIGTSTP);
1270 /*
1271 * If we didn't get the window size before the SUSPEND, but we
1272 * can get them now (?), then send the NAWS to make sure that
1273 * we are set up for the right window size.
1274 */
1275 if (TerminalWindowSize(&newrows, &newcols) && connected &&
1276 (err_ || ((oldrows != newrows) || (oldcols != newcols)))) {
1277 sendnaws();
1278 }
1279 }
1280 /* reget parameters in case they were changed */
1281 TerminalSaveState();
1282 setconnmode(0);
1283 #else
1284 printf("Suspend is not supported. Try the '!' command instead\n");
1285 #endif
1286 return 1;
1287 }
1288
1289 static int
1290 shell(int argc, char *argv[] __unused)
1291 {
1292 long oldrows, oldcols, newrows, newcols, err_;
1293
1294 setcommandmode();
1295
1296 err_ = (TerminalWindowSize(&oldrows, &oldcols) == 0) ? 1 : 0;
1297 switch(vfork()) {
1298 case -1:
1299 perror("Fork failed\n");
1300 break;
1301
1302 case 0:
1303 {
1304 /*
1305 * Fire up the shell in the child.
1306 */
1307 const char *shellp, *shellname;
1308
1309 shellp = getenv("SHELL");
1310 if (shellp == NULL)
1311 shellp = "/bin/sh";
1312 if ((shellname = strrchr(shellp, '/')) == 0)
1313 shellname = shellp;
1314 else
1315 shellname++;
1316 if (argc > 1)
1317 execl(shellp, shellname, "-c", &saveline[1], (char *)0);
1318 else
1319 execl(shellp, shellname, (char *)0);
1320 perror("Execl");
1321 _exit(1);
1322 }
1323 default:
1324 (void)wait((int *)0); /* Wait for the shell to complete */
1325
1326 if (TerminalWindowSize(&newrows, &newcols) && connected &&
1327 (err_ || ((oldrows != newrows) || (oldcols != newcols)))) {
1328 sendnaws();
1329 }
1330 break;
1331 }
1332 return 1;
1333 }
1334
1335 static int
1336 bye(int argc, char *argv[])
1337 {
1338 extern int resettermname;
1339
1340 if (connected) {
1341 (void) shutdown(net, SHUT_RDWR);
1342 printf("Connection closed.\n");
1343 (void) NetClose(net);
1344 connected = 0;
1345 resettermname = 1;
1346 /* reset options */
1347 tninit();
1348 }
1349 if ((argc != 2) || (strcmp(argv[1], "fromquit") != 0)) {
1350 longjmp(toplevel, 1);
1351 /* NOTREACHED */
1352 }
1353 return 1; /* Keep lint, etc., happy */
1354 }
1355
1356 void
1357 quit(void)
1358 {
1359 (void) call(bye, "bye", "fromquit", 0);
1360 Exit(0);
1361 }
1362
1363 static int
1364 logout(void)
1365 {
1366 send_do(TELOPT_LOGOUT, 1);
1367 (void) netflush();
1368 return 1;
1369 }
1370
1371 \f
1372 /*
1373 * The SLC command.
1374 */
1375
1376 struct slclist {
1377 const char *name;
1378 const char *help;
1379 void (*handler)(int);
1380 int arg;
1381 };
1382
1383 static void slc_help(void);
1384
1385 struct slclist SlcList[] = {
1386 { "export", "Use local special character definitions",
1387 (void (*)(int))slc_mode_export, 0 },
1388 { "import", "Use remote special character definitions",
1389 slc_mode_import, 1 },
1390 { "check", "Verify remote special character definitions",
1391 slc_mode_import, 0 },
1392 { "help", NULL, (void (*)(int))slc_help, 0 },
1393 { "?", "Print help information", (void (*)(int))slc_help, 0 },
1394 { NULL, NULL, NULL, 0 },
1395 };
1396
1397 static void
1398 slc_help(void)
1399 {
1400 struct slclist *c;
1401
1402 for (c = SlcList; c->name; c++) {
1403 if (c->help) {
1404 if (*c->help)
1405 printf("%-15s %s\n", c->name, c->help);
1406 else
1407 printf("\n");
1408 }
1409 }
1410 }
1411
1412 static struct slclist *
1413 getslc(char *name)
1414 {
1415 return (struct slclist *)
1416 genget(name, (char **) SlcList, sizeof(struct slclist));
1417 }
1418
1419 static int
1420 slccmd(int argc, char *argv[])
1421 {
1422 struct slclist *c;
1423
1424 if (argc != 2) {
1425 fprintf(stderr,
1426 "Need an argument to 'slc' command. 'slc ?' for help.\n");
1427 return 0;
1428 }
1429 c = getslc(argv[1]);
1430 if (c == 0) {
1431 fprintf(stderr, "'%s': unknown argument ('slc ?' for help).\n",
1432 argv[1]);
1433 return 0;
1434 }
1435 if (Ambiguous((void *)c)) {
1436 fprintf(stderr, "'%s': ambiguous argument ('slc ?' for help).\n",
1437 argv[1]);
1438 return 0;
1439 }
1440 (*c->handler)(c->arg);
1441 slcstate();
1442 return 1;
1443 }
1444 \f
1445 /*
1446 * The ENVIRON command.
1447 */
1448
1449 struct envlist {
1450 const char *name;
1451 const char *help;
1452 void (*handler)(unsigned char *, unsigned char *);
1453 int narg;
1454 };
1455
1456 extern struct env_lst *
1457 env_define(const unsigned char *, unsigned char *);
1458 extern void
1459 env_undefine(unsigned char *),
1460 env_export(const unsigned char *),
1461 env_unexport(const unsigned char *),
1462 env_send(unsigned char *),
1463 #if defined(OLD_ENVIRON) && defined(ENV_HACK)
1464 env_varval(unsigned char *),
1465 #endif
1466 env_list(void);
1467 static void
1468 env_help(void);
1469
1470 struct envlist EnvList[] = {
1471 { "define", "Define an environment variable",
1472 (void (*)(unsigned char *, unsigned char *))env_define, 2 },
1473 { "undefine", "Undefine an environment variable",
1474 (void (*)(unsigned char *, unsigned char *))env_undefine, 1 },
1475 { "export", "Mark an environment variable for automatic export",
1476 (void (*)(unsigned char *, unsigned char *))env_export, 1 },
1477 { "unexport", "Don't mark an environment variable for automatic export",
1478 (void (*)(unsigned char *, unsigned char *))env_unexport, 1 },
1479 { "send", "Send an environment variable", (void (*)(unsigned char *, unsigned char *))env_send, 1 },
1480 { "list", "List the current environment variables",
1481 (void (*)(unsigned char *, unsigned char *))env_list, 0 },
1482 #if defined(OLD_ENVIRON) && defined(ENV_HACK)
1483 { "varval", "Reverse VAR and VALUE (auto, right, wrong, status)",
1484 (void (*)(unsigned char *, unsigned char *))env_varval, 1 },
1485 #endif
1486 { "help", NULL, (void (*)(unsigned char *, unsigned char *))env_help, 0 },
1487 { "?", "Print help information", (void (*)(unsigned char *, unsigned char *))env_help, 0 },
1488 { NULL, NULL, NULL, 0 },
1489 };
1490
1491 static void
1492 env_help(void)
1493 {
1494 struct envlist *c;
1495
1496 for (c = EnvList; c->name; c++) {
1497 if (c->help) {
1498 if (*c->help)
1499 printf("%-15s %s\n", c->name, c->help);
1500 else
1501 printf("\n");
1502 }
1503 }
1504 }
1505
1506 static struct envlist *
1507 getenvcmd(char *name)
1508 {
1509 return (struct envlist *)
1510 genget(name, (char **) EnvList, sizeof(struct envlist));
1511 }
1512
1513 static int
1514 env_cmd(int argc, char *argv[])
1515 {
1516 struct envlist *c;
1517
1518 if (argc < 2) {
1519 fprintf(stderr,
1520 "Need an argument to 'environ' command. 'environ ?' for help.\n");
1521 return 0;
1522 }
1523 c = getenvcmd(argv[1]);
1524 if (c == 0) {
1525 fprintf(stderr, "'%s': unknown argument ('environ ?' for help).\n",
1526 argv[1]);
1527 return 0;
1528 }
1529 if (Ambiguous((void *)c)) {
1530 fprintf(stderr, "'%s': ambiguous argument ('environ ?' for help).\n",
1531 argv[1]);
1532 return 0;
1533 }
1534 if (c->narg + 2 != argc) {
1535 fprintf(stderr,
1536 "Need %s%d argument%s to 'environ %s' command. 'environ ?' for help.\n",
1537 c->narg < argc + 2 ? "only " : "",
1538 c->narg, c->narg == 1 ? "" : "s", c->name);
1539 return 0;
1540 }
1541 (*c->handler)(argv[2], argv[3]);
1542 return 1;
1543 }
1544
1545 struct env_lst {
1546 struct env_lst *next; /* pointer to next structure */
1547 struct env_lst *prev; /* pointer to previous structure */
1548 unsigned char *var; /* pointer to variable name */
1549 unsigned char *value; /* pointer to variable value */
1550 int export; /* 1 -> export with default list of variables */
1551 int welldefined; /* A well defined variable */
1552 };
1553
1554 struct env_lst envlisthead;
1555
1556 static struct env_lst *
1557 env_find(const unsigned char *var)
1558 {
1559 struct env_lst *ep;
1560
1561 for (ep = envlisthead.next; ep; ep = ep->next) {
1562 if (strcmp(ep->var, var) == 0)
1563 return(ep);
1564 }
1565 return(NULL);
1566 }
1567
1568 void
1569 env_init(void)
1570 {
1571 extern char **environ;
1572 char **epp, *cp;
1573 struct env_lst *ep;
1574
1575 for (epp = environ; *epp; epp++) {
1576 if ((cp = strchr(*epp, '='))) {
1577 *cp = '\0';
1578 ep = env_define((unsigned char *)*epp,
1579 (unsigned char *)cp+1);
1580 ep->export = 0;
1581 *cp = '=';
1582 }
1583 }
1584 /*
1585 * Special case for DISPLAY variable. If it is ":0.0" or
1586 * "unix:0.0", we have to get rid of "unix" and insert our
1587 * hostname.
1588 */
1589 if ((ep = env_find("DISPLAY"))
1590 && ((*ep->value == ':')
1591 || (strncmp((char *)ep->value, "unix:", 5) == 0))) {
1592 char hbuf[256+1];
1593 char *cp2 = strchr((char *)ep->value, ':');
1594
1595 gethostname(hbuf, 256);
1596 hbuf[256] = '\0';
1597 cp = (char *)malloc(strlen(hbuf) + strlen(cp2) + 1);
1598 sprintf((char *)cp, "%s%s", hbuf, cp2);
1599 free(ep->value);
1600 ep->value = (unsigned char *)cp;
1601 }
1602 /*
1603 * If USER is not defined, but LOGNAME is, then add
1604 * USER with the value from LOGNAME. By default, we
1605 * don't export the USER variable.
1606 */
1607 if ((env_find("USER") == NULL) && (ep = env_find("LOGNAME"))) {
1608 env_define("USER", ep->value);
1609 env_unexport("USER");
1610 }
1611 env_export("DISPLAY");
1612 env_export("PRINTER");
1613 }
1614
1615 struct env_lst *
1616 env_define(const unsigned char *var, unsigned char *value)
1617 {
1618 struct env_lst *ep;
1619
1620 if ((ep = env_find(var))) {
1621 if (ep->var)
1622 free(ep->var);
1623 if (ep->value)
1624 free(ep->value);
1625 } else {
1626 ep = (struct env_lst *)malloc(sizeof(struct env_lst));
1627 ep->next = envlisthead.next;
1628 envlisthead.next = ep;
1629 ep->prev = &envlisthead;
1630 if (ep->next)
1631 ep->next->prev = ep;
1632 }
1633 ep->welldefined = opt_welldefined(var);
1634 ep->export = 1;
1635 ep->var = strdup(var);
1636 ep->value = strdup(value);
1637 return(ep);
1638 }
1639
1640 void
1641 env_undefine(unsigned char *var)
1642 {
1643 struct env_lst *ep;
1644
1645 if ((ep = env_find(var))) {
1646 ep->prev->next = ep->next;
1647 if (ep->next)
1648 ep->next->prev = ep->prev;
1649 if (ep->var)
1650 free(ep->var);
1651 if (ep->value)
1652 free(ep->value);
1653 free(ep);
1654 }
1655 }
1656
1657 void
1658 env_export(const unsigned char *var)
1659 {
1660 struct env_lst *ep;
1661
1662 if ((ep = env_find(var)))
1663 ep->export = 1;
1664 }
1665
1666 void
1667 env_unexport(const unsigned char *var)
1668 {
1669 struct env_lst *ep;
1670
1671 if ((ep = env_find(var)))
1672 ep->export = 0;
1673 }
1674
1675 void
1676 env_send(unsigned char *var)
1677 {
1678 struct env_lst *ep;
1679
1680 if (my_state_is_wont(TELOPT_NEW_ENVIRON)
1681 #ifdef OLD_ENVIRON
1682 && my_state_is_wont(TELOPT_OLD_ENVIRON)
1683 #endif
1684 ) {
1685 fprintf(stderr,
1686 "Cannot send '%s': Telnet ENVIRON option not enabled\n",
1687 var);
1688 return;
1689 }
1690 ep = env_find(var);
1691 if (ep == 0) {
1692 fprintf(stderr, "Cannot send '%s': variable not defined\n",
1693 var);
1694 return;
1695 }
1696 env_opt_start_info();
1697 env_opt_add(ep->var);
1698 env_opt_end(0);
1699 }
1700
1701 void
1702 env_list(void)
1703 {
1704 struct env_lst *ep;
1705
1706 for (ep = envlisthead.next; ep; ep = ep->next) {
1707 printf("%c %-20s %s\n", ep->export ? '*' : ' ',
1708 ep->var, ep->value);
1709 }
1710 }
1711
1712 unsigned char *
1713 env_default(int init, int welldefined)
1714 {
1715 static struct env_lst *nep = NULL;
1716
1717 if (init) {
1718 nep = &envlisthead;
1719 return(NULL);
1720 }
1721 if (nep) {
1722 while ((nep = nep->next)) {
1723 if (nep->export && (nep->welldefined == welldefined))
1724 return(nep->var);
1725 }
1726 }
1727 return(NULL);
1728 }
1729
1730 unsigned char *
1731 env_getvalue(const unsigned char *var)
1732 {
1733 struct env_lst *ep;
1734
1735 if ((ep = env_find(var)))
1736 return(ep->value);
1737 return(NULL);
1738 }
1739
1740 #if defined(OLD_ENVIRON) && defined(ENV_HACK)
1741 void
1742 env_varval(unsigned char *what)
1743 {
1744 extern int old_env_var, old_env_value, env_auto;
1745 int len = strlen((char *)what);
1746
1747 if (len == 0)
1748 goto unknown;
1749
1750 if (strncasecmp((char *)what, "status", len) == 0) {
1751 if (env_auto)
1752 printf("%s%s", "VAR and VALUE are/will be ",
1753 "determined automatically\n");
1754 if (old_env_var == OLD_ENV_VAR)
1755 printf("VAR and VALUE set to correct definitions\n");
1756 else
1757 printf("VAR and VALUE definitions are reversed\n");
1758 } else if (strncasecmp((char *)what, "auto", len) == 0) {
1759 env_auto = 1;
1760 old_env_var = OLD_ENV_VALUE;
1761 old_env_value = OLD_ENV_VAR;
1762 } else if (strncasecmp((char *)what, "right", len) == 0) {
1763 env_auto = 0;
1764 old_env_var = OLD_ENV_VAR;
1765 old_env_value = OLD_ENV_VALUE;
1766 } else if (strncasecmp((char *)what, "wrong", len) == 0) {
1767 env_auto = 0;
1768 old_env_var = OLD_ENV_VALUE;
1769 old_env_value = OLD_ENV_VAR;
1770 } else {
1771 unknown:
1772 printf("Unknown \"varval\" command. (\"auto\", \"right\", \"wrong\", \"status\")\n");
1773 }
1774 }
1775 #endif
1776
1777
1778
1779 /*
1780 * Print status about the connection.
1781 */
1782 /*ARGSUSED*/
1783 static int
1784 status(int argc, char *argv[])
1785 {
1786 if (connected) {
1787 printf("Connected to %s.\n", hostname);
1788 if ((argc < 2) || strcmp(argv[1], "notmuch")) {
1789 int mode = getconnmode();
1790
1791 if (my_want_state_is_will(TELOPT_LINEMODE)) {
1792 printf("Operating with LINEMODE option\n");
1793 printf("%s line editing\n", (mode&MODE_EDIT) ? "Local" : "No");
1794 printf("%s catching of signals\n",
1795 (mode&MODE_TRAPSIG) ? "Local" : "No");
1796 slcstate();
1797 #ifdef KLUDGELINEMODE
1798 } else if (kludgelinemode && my_want_state_is_dont(TELOPT_SGA)) {
1799 printf("Operating in obsolete linemode\n");
1800 #endif
1801 } else {
1802 printf("Operating in single character mode\n");
1803 if (localchars)
1804 printf("Catching signals locally\n");
1805 }
1806 printf("%s character echo\n", (mode&MODE_ECHO) ? "Local" : "Remote");
1807 if (my_want_state_is_will(TELOPT_LFLOW))
1808 printf("%s flow control\n", (mode&MODE_FLOW) ? "Local" : "No");
1809 }
1810 } else {
1811 printf("No connection.\n");
1812 }
1813 printf("Escape character is '%s'.\n", control(escape));
1814 (void) fflush(stdout);
1815 return 1;
1816 }
1817
1818 #ifdef SIGINFO
1819 /*
1820 * Function that gets called when SIGINFO is received.
1821 */
1822 void
1823 ayt_status(void)
1824 {
1825 (void) call(status, "status", "notmuch", 0);
1826 }
1827 #endif
1828
1829 static const char *
1830 sockaddr_ntop(struct sockaddr *sa)
1831 {
1832 void *addr;
1833 static char addrbuf[INET6_ADDRSTRLEN];
1834
1835 switch (sa->sa_family) {
1836 case AF_INET:
1837 addr = &((struct sockaddr_in *)sa)->sin_addr;
1838 break;
1839 case AF_UNIX:
1840 addr = &((struct sockaddr_un *)sa)->sun_path;
1841 break;
1842 #ifdef INET6
1843 case AF_INET6:
1844 addr = &((struct sockaddr_in6 *)sa)->sin6_addr;
1845 break;
1846 #endif
1847 default:
1848 return NULL;
1849 }
1850 inet_ntop(sa->sa_family, addr, addrbuf, sizeof(addrbuf));
1851 return addrbuf;
1852 }
1853
1854 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
1855 static int
1856 setpolicy(int lnet, struct addrinfo *res, char *policy)
1857 {
1858 char *buf;
1859 int level;
1860 int optname;
1861
1862 if (policy == NULL)
1863 return 0;
1864
1865 buf = ipsec_set_policy(policy, strlen(policy));
1866 if (buf == NULL) {
1867 printf("%s\n", ipsec_strerror());
1868 return -1;
1869 }
1870 level = res->ai_family == AF_INET ? IPPROTO_IP : IPPROTO_IPV6;
1871 optname = res->ai_family == AF_INET ? IP_IPSEC_POLICY : IPV6_IPSEC_POLICY;
1872 if (setsockopt(lnet, level, optname, buf, ipsec_get_policylen(buf)) < 0){
1873 perror("setsockopt");
1874 return -1;
1875 }
1876
1877 free(buf);
1878 return 0;
1879 }
1880 #endif
1881
1882 #ifdef INET6
1883 /*
1884 * When an Address Family related error happend, check if retry with
1885 * another AF is possible or not.
1886 * Return 1, if retry with another af is OK. Else, return 0.
1887 */
1888 static int
1889 switch_af(struct addrinfo **aip)
1890 {
1891 int nextaf;
1892 struct addrinfo *ai;
1893
1894 ai = *aip;
1895 nextaf = (ai->ai_family == AF_INET) ? AF_INET6 : AF_INET;
1896 do
1897 ai=ai->ai_next;
1898 while (ai != NULL && ai->ai_family != nextaf);
1899 *aip = ai;
1900 if (*aip != NULL) {
1901 return 1;
1902 }
1903 return 0;
1904 }
1905 #endif
1906
1907 int
1908 tn(int argc, char *argv[])
1909 {
1910 char *srp = 0;
1911 int proto, opt;
1912 int srlen;
1913 int srcroute = 0, result;
1914 char *cmd, *hostp = 0, *portp = 0, *user = 0;
1915 char *src_addr = NULL;
1916 struct addrinfo hints, *res, *res0 = NULL, *src_res, *src_res0 = NULL;
1917 int error = 0, af_error = 0;
1918
1919 if (connected) {
1920 printf("?Already connected to %s\n", hostname);
1921 setuid(getuid());
1922 return 0;
1923 }
1924 if (argc < 2) {
1925 (void) strcpy(line, "open ");
1926 printf("(to) ");
1927 (void) fgets(&line[strlen(line)], sizeof(line) - strlen(line), stdin);
1928 makeargv();
1929 argc = margc;
1930 argv = margv;
1931 }
1932 cmd = *argv;
1933 --argc; ++argv;
1934 while (argc) {
1935 if (strcmp(*argv, "help") == 0 || isprefix(*argv, "?"))
1936 goto usage;
1937 if (strcmp(*argv, "-l") == 0) {
1938 --argc; ++argv;
1939 if (argc == 0)
1940 goto usage;
1941 user = *argv++;
1942 --argc;
1943 continue;
1944 }
1945 if (strcmp(*argv, "-a") == 0) {
1946 --argc; ++argv;
1947 autologin = 1;
1948 continue;
1949 }
1950 if (strcmp(*argv, "-s") == 0) {
1951 --argc; ++argv;
1952 if (argc == 0)
1953 goto usage;
1954 src_addr = *argv++;
1955 --argc;
1956 continue;
1957 }
1958 if (hostp == 0) {
1959 hostp = *argv++;
1960 --argc;
1961 continue;
1962 }
1963 if (portp == 0) {
1964 portp = *argv++;
1965 --argc;
1966 continue;
1967 }
1968 usage:
1969 printf("usage: %s [-l user] [-a] [-s src_addr] host-name [port]\n", cmd);
1970 setuid(getuid());
1971 return 0;
1972 }
1973 if (hostp == 0)
1974 goto usage;
1975
1976 if (src_addr != NULL) {
1977 memset(&hints, 0, sizeof(hints));
1978 hints.ai_flags = AI_NUMERICHOST;
1979 hints.ai_family = family;
1980 hints.ai_socktype = SOCK_STREAM;
1981 error = getaddrinfo(src_addr, 0, &hints, &src_res);
1982 if (error == EAI_NODATA) {
1983 hints.ai_flags = 0;
1984 error = getaddrinfo(src_addr, 0, &hints, &src_res);
1985 }
1986 if (error != 0) {
1987 fprintf(stderr, "%s: %s\n", src_addr, gai_strerror(error));
1988 if (error == EAI_SYSTEM)
1989 fprintf(stderr, "%s: %s\n", src_addr, strerror(errno));
1990 setuid(getuid());
1991 return 0;
1992 }
1993 src_res0 = src_res;
1994 }
1995 if (hostp[0] == '/') {
1996 struct sockaddr_un su;
1997
1998 if (strlen(hostp) >= sizeof(su.sun_path)) {
1999 fprintf(stderr, "hostname too long for unix domain socket: %s",
2000 hostp);
2001 goto fail;
2002 }
2003 memset(&su, 0, sizeof su);
2004 su.sun_family = AF_UNIX;
2005 strncpy(su.sun_path, hostp, sizeof su.sun_path);
2006 printf("Trying %s...\n", hostp);
2007 net = socket(PF_UNIX, SOCK_STREAM, 0);
2008 if ( net < 0) {
2009 perror("socket");
2010 goto fail;
2011 }
2012 if (connect(net, (struct sockaddr *)&su, sizeof su) == -1) {
2013 perror(su.sun_path);
2014 (void) NetClose(net);
2015 goto fail;
2016 }
2017 goto af_unix;
2018 } else if (hostp[0] == '@' || hostp[0] == '!') {
2019 if (
2020 #ifdef INET6
2021 family == AF_INET6 ||
2022 #endif
2023 (hostname = strrchr(hostp, ':')) == NULL)
2024 hostname = strrchr(hostp, '@');
2025 if (hostname == NULL) {
2026 hostname = hostp;
2027 } else {
2028 hostname++;
2029 srcroute = 1;
2030 }
2031 } else
2032 hostname = hostp;
2033 if (!portp) {
2034 telnetport = 1;
2035 portp = strdup("telnet");
2036 } else if (*portp == '-') {
2037 portp++;
2038 telnetport = 1;
2039 } else
2040 telnetport = 0;
2041
2042 memset(&hints, 0, sizeof(hints));
2043 hints.ai_flags = AI_NUMERICHOST;
2044 hints.ai_family = family;
2045 hints.ai_socktype = SOCK_STREAM;
2046 error = getaddrinfo(hostname, portp, &hints, &res);
2047 if (error) {
2048 hints.ai_flags = AI_CANONNAME;
2049 error = getaddrinfo(hostname, portp, &hints, &res);
2050 }
2051 if (error != 0) {
2052 fprintf(stderr, "%s: %s\n", hostname, gai_strerror(error));
2053 if (error == EAI_SYSTEM)
2054 fprintf(stderr, "%s: %s\n", hostname, strerror(errno));
2055 setuid(getuid());
2056 goto fail;
2057 }
2058 if (hints.ai_flags == AI_NUMERICHOST) {
2059 /* hostname has numeric */
2060 int gni_err = 1;
2061
2062 if (doaddrlookup)
2063 gni_err = getnameinfo(res->ai_addr, res->ai_addr->sa_len,
2064 _hostname, sizeof(_hostname) - 1, NULL, 0,
2065 NI_NAMEREQD);
2066 if (gni_err != 0)
2067 (void) strncpy(_hostname, hostp, sizeof(_hostname) - 1);
2068 _hostname[sizeof(_hostname)-1] = '\0';
2069 hostname = _hostname;
2070 } else {
2071 /* hostname has FQDN */
2072 if (srcroute != 0)
2073 (void) strncpy(_hostname, hostname, sizeof(_hostname) - 1);
2074 else if (res->ai_canonname != NULL)
2075 strcpy(_hostname, res->ai_canonname);
2076 else
2077 (void) strncpy(_hostname, hostp, sizeof(_hostname) - 1);
2078 _hostname[sizeof(_hostname)-1] = '\0';
2079 hostname = _hostname;
2080 }
2081 res0 = res;
2082 #ifdef INET6
2083 af_again:
2084 #endif
2085 if (srcroute != 0) {
2086 static char hostbuf[BUFSIZ];
2087
2088 if (af_error == 0) { /* save intermediate hostnames for retry */
2089 strncpy(hostbuf, hostp, BUFSIZ - 1);
2090 hostbuf[BUFSIZ - 1] = '\0';
2091 } else
2092 hostp = hostbuf;
2093 srp = 0;
2094 result = sourceroute(res, hostp, &srp, &srlen, &proto, &opt);
2095 if (result == 0) {
2096 #ifdef INET6
2097 if (family == AF_UNSPEC && af_error == 0 &&
2098 switch_af(&res) == 1) {
2099 af_error = 1;
2100 goto af_again;
2101 }
2102 #endif
2103 setuid(getuid());
2104 goto fail;
2105 } else if (result == -1) {
2106 printf("Bad source route option: %s\n", hostp);
2107 setuid(getuid());
2108 goto fail;
2109 }
2110 }
2111 do {
2112 printf("Trying %s...\n", sockaddr_ntop(res->ai_addr));
2113 net = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
2114 setuid(getuid());
2115 if (net < 0) {
2116 #ifdef INET6
2117 if (family == AF_UNSPEC && af_error == 0 &&
2118 switch_af(&res) == 1) {
2119 af_error = 1;
2120 goto af_again;
2121 }
2122 #endif
2123 perror("telnet: socket");
2124 goto fail;
2125 }
2126 if (srp && setsockopt(net, proto, opt, (char *)srp, srlen) < 0)
2127 perror("setsockopt (source route)");
2128 #if defined(IPPROTO_IP) && defined(IP_TOS)
2129 if (res->ai_family == PF_INET) {
2130 # if defined(HAS_GETTOS)
2131 struct tosent *tp;
2132 if (tos < 0 && (tp = gettosbyname("telnet", "tcp")))
2133 tos = tp->t_tos;
2134 # endif
2135 if (tos < 0)
2136 tos = IPTOS_LOWDELAY;
2137 if (tos
2138 && (setsockopt(net, IPPROTO_IP, IP_TOS,
2139 (char *)&tos, sizeof(int)) < 0)
2140 && (errno != ENOPROTOOPT))
2141 perror("telnet: setsockopt (IP_TOS) (ignored)");
2142 }
2143 #endif /* defined(IPPROTO_IP) && defined(IP_TOS) */
2144
2145 if (debug && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 1) < 0) {
2146 perror("setsockopt (SO_DEBUG)");
2147 }
2148
2149 if (src_addr != NULL) {
2150 for (src_res = src_res0; src_res != 0; src_res = src_res->ai_next)
2151 if (src_res->ai_family == res->ai_family)
2152 break;
2153 if (src_res == NULL)
2154 src_res = src_res0;
2155 if (bind(net, src_res->ai_addr, src_res->ai_addrlen) == -1) {
2156 #ifdef INET6
2157 if (family == AF_UNSPEC && af_error == 0 &&
2158 switch_af(&res) == 1) {
2159 af_error = 1;
2160 (void) NetClose(net);
2161 goto af_again;
2162 }
2163 #endif
2164 perror("bind");
2165 (void) NetClose(net);
2166 goto fail;
2167 }
2168 }
2169 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
2170 if (setpolicy(net, res, ipsec_policy_in) < 0) {
2171 (void) NetClose(net);
2172 goto fail;
2173 }
2174 if (setpolicy(net, res, ipsec_policy_out) < 0) {
2175 (void) NetClose(net);
2176 goto fail;
2177 }
2178 #endif
2179
2180 if (connect(net, res->ai_addr, res->ai_addrlen) < 0) {
2181 struct addrinfo *next;
2182
2183 next = res->ai_next;
2184 /* If already an af failed, only try same af. */
2185 if (af_error != 0)
2186 while (next != NULL && next->ai_family != res->ai_family)
2187 next = next->ai_next;
2188 warn("connect to address %s", sockaddr_ntop(res->ai_addr));
2189 if (next != NULL) {
2190 res = next;
2191 (void) NetClose(net);
2192 continue;
2193 }
2194 warnx("Unable to connect to remote host");
2195 (void) NetClose(net);
2196 goto fail;
2197 }
2198 connected++;
2199 } while (connected == 0);
2200 freeaddrinfo(res0);
2201 if (src_res0 != NULL)
2202 freeaddrinfo(src_res0);
2203 cmdrc(hostp, hostname);
2204 af_unix:
2205 if (autologin && user == NULL) {
2206 struct passwd *pw;
2207
2208 user = getenv("USER");
2209 if (user == NULL ||
2210 ((pw = getpwnam(user)) && pw->pw_uid != getuid())) {
2211 if ((pw = getpwuid(getuid())))
2212 user = pw->pw_name;
2213 else
2214 user = NULL;
2215 }
2216 }
2217 if (user) {
2218 env_define("USER", user);
2219 env_export("USER");
2220 }
2221 (void) call(status, "status", "notmuch", 0);
2222 if (setjmp(peerdied) == 0)
2223 telnet(user);
2224 (void) NetClose(net);
2225 ExitString("Connection closed by foreign host.\n",1);
2226 /*NOTREACHED*/
2227 fail:
2228 if (res0 != NULL)
2229 freeaddrinfo(res0);
2230 if (src_res0 != NULL)
2231 freeaddrinfo(src_res0);
2232 return 0;
2233 }
2234
2235 #define HELPINDENT (sizeof ("connect"))
2236
2237 static char
2238 openhelp[] = "connect to a site",
2239 closehelp[] = "close current connection",
2240 logouthelp[] = "forcibly logout remote user and close the connection",
2241 quithelp[] = "exit telnet",
2242 statushelp[] = "print status information",
2243 helphelp[] = "print help information",
2244 sendhelp[] = "transmit special characters ('send ?' for more)",
2245 sethelp[] = "set operating parameters ('set ?' for more)",
2246 unsethelp[] = "unset operating parameters ('unset ?' for more)",
2247 togglestring[] ="toggle operating parameters ('toggle ?' for more)",
2248 slchelp[] = "change state of special characters ('slc ?' for more)",
2249 displayhelp[] = "display operating parameters",
2250 zhelp[] = "suspend telnet",
2251 #ifdef OPIE
2252 opiehelp[] = "compute response to OPIE challenge",
2253 #endif
2254 shellhelp[] = "invoke a subshell",
2255 envhelp[] = "change environment variables ('environ ?' for more)",
2256 modestring[] = "try to enter line or character mode ('mode ?' for more)";
2257
2258 static Command cmdtab[] = {
2259 { "close", closehelp, bye, 1 },
2260 { "logout", logouthelp, (int (*)(int, char **))logout, 1 },
2261 { "display", displayhelp, display, 0 },
2262 { "mode", modestring, modecmd, 0 },
2263 { "telnet", openhelp, tn, 0 },
2264 { "open", openhelp, tn, 0 },
2265 { "quit", quithelp, (int (*)(int, char **))quit, 0 },
2266 { "send", sendhelp, sendcmd, 0 },
2267 { "set", sethelp, setcmd, 0 },
2268 { "unset", unsethelp, unsetcmd, 0 },
2269 { "status", statushelp, status, 0 },
2270 { "toggle", togglestring, toggle, 0 },
2271 { "slc", slchelp, slccmd, 0 },
2272 { "z", zhelp, (int (*)(int, char **))suspend, 0 },
2273 { "!", shellhelp, shell, 1 },
2274 { "environ", envhelp, env_cmd, 0 },
2275 { "?", helphelp, help, 0 },
2276 #ifdef OPIE
2277 { "opie", opiehelp, opie_calc, 0 },
2278 #endif
2279 { NULL, NULL, NULL, 0 }
2280 };
2281
2282 static char crmodhelp[] = "deprecated command -- use 'toggle crmod' instead";
2283 static char escapehelp[] = "deprecated command -- use 'set escape' instead";
2284
2285 static Command cmdtab2[] = {
2286 { "help", 0, help, 0 },
2287 { "escape", escapehelp, setescape, 0 },
2288 { "crmod", crmodhelp, (int (*)(int, char **))togcrmod, 0 },
2289 { NULL, NULL, NULL, 0 }
2290 };
2291
2292
2293 /*
2294 * Call routine with argc, argv set from args (terminated by 0).
2295 */
2296
2297 static int
2298 call(intrtn_t routine, ...)
2299 {
2300 va_list ap;
2301 char *args[100];
2302 int argno = 0;
2303
2304 va_start(ap, routine);
2305 while ((args[argno++] = va_arg(ap, char *)) != 0);
2306 va_end(ap);
2307 return (*routine)(argno-1, args);
2308 }
2309
2310
2311 static Command *
2312 getcmd(char *name)
2313 {
2314 Command *cm;
2315
2316 if ((cm = (Command *) genget(name, (char **) cmdtab, sizeof(Command))))
2317 return cm;
2318 return (Command *) genget(name, (char **) cmdtab2, sizeof(Command));
2319 }
2320
2321 void
2322 command(int top, const char *tbuf, int cnt)
2323 {
2324 Command *c;
2325
2326 setcommandmode();
2327 if (!top) {
2328 putchar('\n');
2329 } else {
2330 (void) signal(SIGINT, SIG_DFL);
2331 (void) signal(SIGQUIT, SIG_DFL);
2332 }
2333 for (;;) {
2334 if (rlogin == _POSIX_VDISABLE)
2335 printf("%s> ", prompt);
2336 if (tbuf) {
2337 char *cp;
2338 cp = line;
2339 while (cnt > 0 && (*cp++ = *tbuf++) != '\n')
2340 cnt--;
2341 tbuf = 0;
2342 if (cp == line || *--cp != '\n' || cp == line)
2343 goto getline;
2344 *cp = '\0';
2345 if (rlogin == _POSIX_VDISABLE)
2346 printf("%s\n", line);
2347 } else {
2348 getline:
2349 if (rlogin != _POSIX_VDISABLE)
2350 printf("%s> ", prompt);
2351 if (fgets(line, sizeof(line), stdin) == NULL) {
2352 if (feof(stdin) || ferror(stdin)) {
2353 (void) quit();
2354 /*NOTREACHED*/
2355 }
2356 break;
2357 }
2358 }
2359 if (line[0] == 0)
2360 break;
2361 makeargv();
2362 if (margv[0] == 0) {
2363 break;
2364 }
2365 c = getcmd(margv[0]);
2366 if (Ambiguous((void *)c)) {
2367 printf("?Ambiguous command\n");
2368 continue;
2369 }
2370 if (c == 0) {
2371 printf("?Invalid command\n");
2372 continue;
2373 }
2374 if (c->needconnect && !connected) {
2375 printf("?Need to be connected first.\n");
2376 continue;
2377 }
2378 if ((*c->handler)(margc, margv)) {
2379 break;
2380 }
2381 }
2382 if (!top) {
2383 if (!connected) {
2384 longjmp(toplevel, 1);
2385 /*NOTREACHED*/
2386 }
2387 setconnmode(0);
2388 }
2389 }
2390 \f
2391 /*
2392 * Help command.
2393 */
2394 static int
2395 help(int argc, char *argv[])
2396 {
2397 Command *c;
2398
2399 if (argc == 1) {
2400 printf("Commands may be abbreviated. Commands are:\n\n");
2401 for (c = cmdtab; c->name; c++)
2402 if (c->help) {
2403 printf("%-*s\t%s\n", (int)HELPINDENT, c->name,
2404 c->help);
2405 }
2406 return 0;
2407 }
2408 else while (--argc > 0) {
2409 char *arg;
2410 arg = *++argv;
2411 c = getcmd(arg);
2412 if (Ambiguous((void *)c))
2413 printf("?Ambiguous help command %s\n", arg);
2414 else if (c == (Command *)0)
2415 printf("?Invalid help command %s\n", arg);
2416 else
2417 printf("%s\n", c->help);
2418 }
2419 return 0;
2420 }
2421
2422 static char *rcname = 0;
2423 static char rcbuf[128];
2424
2425 void
2426 cmdrc(char *m1, char *m2)
2427 {
2428 Command *c;
2429 FILE *rcfile;
2430 int gotmachine = 0;
2431 int l1 = strlen(m1);
2432 int l2 = strlen(m2);
2433 char m1save[MAXHOSTNAMELEN];
2434
2435 if (skiprc)
2436 return;
2437
2438 strlcpy(m1save, m1, sizeof(m1save));
2439 m1 = m1save;
2440
2441 if (rcname == 0) {
2442 rcname = getenv("HOME");
2443 if (rcname && (strlen(rcname) + 10) < sizeof(rcbuf))
2444 strcpy(rcbuf, rcname);
2445 else
2446 rcbuf[0] = '\0';
2447 strcat(rcbuf, "/.telnetrc");
2448 rcname = rcbuf;
2449 }
2450
2451 if ((rcfile = fopen(rcname, "r")) == 0) {
2452 return;
2453 }
2454
2455 for (;;) {
2456 if (fgets(line, sizeof(line), rcfile) == NULL)
2457 break;
2458 if (line[0] == 0)
2459 break;
2460 if (line[0] == '#')
2461 continue;
2462 if (gotmachine) {
2463 if (!isspace(line[0]))
2464 gotmachine = 0;
2465 }
2466 if (gotmachine == 0) {
2467 if (isspace(line[0]))
2468 continue;
2469 if (strncasecmp(line, m1, l1) == 0)
2470 strncpy(line, &line[l1], sizeof(line) - l1);
2471 else if (strncasecmp(line, m2, l2) == 0)
2472 strncpy(line, &line[l2], sizeof(line) - l2);
2473 else if (strncasecmp(line, "DEFAULT", 7) == 0)
2474 strncpy(line, &line[7], sizeof(line) - 7);
2475 else
2476 continue;
2477 if (line[0] != ' ' && line[0] != '\t' && line[0] != '\n')
2478 continue;
2479 gotmachine = 1;
2480 }
2481 makeargv();
2482 if (margv[0] == 0)
2483 continue;
2484 c = getcmd(margv[0]);
2485 if (Ambiguous((void *)c)) {
2486 printf("?Ambiguous command: %s\n", margv[0]);
2487 continue;
2488 }
2489 if (c == 0) {
2490 printf("?Invalid command: %s\n", margv[0]);
2491 continue;
2492 }
2493 /*
2494 * This should never happen...
2495 */
2496 if (c->needconnect && !connected) {
2497 printf("?Need to be connected first for %s.\n", margv[0]);
2498 continue;
2499 }
2500 (*c->handler)(margc, margv);
2501 }
2502 fclose(rcfile);
2503 }
2504
2505 /*
2506 * Source route is handed in as
2507 * [!]@hop1@hop2...[@|:]dst
2508 * If the leading ! is present, it is a
2509 * strict source route, otherwise it is
2510 * assmed to be a loose source route.
2511 *
2512 * We fill in the source route option as
2513 * hop1,hop2,hop3...dest
2514 * and return a pointer to hop1, which will
2515 * be the address to connect() to.
2516 *
2517 * Arguments:
2518 *
2519 * res: ponter to addrinfo structure which contains sockaddr to
2520 * the host to connect to.
2521 *
2522 * arg: pointer to route list to decipher
2523 *
2524 * cpp: If *cpp is not equal to NULL, this is a
2525 * pointer to a pointer to a character array
2526 * that should be filled in with the option.
2527 *
2528 * lenp: pointer to an integer that contains the
2529 * length of *cpp if *cpp != NULL.
2530 *
2531 * protop: pointer to an integer that should be filled in with
2532 * appropriate protocol for setsockopt, as socket
2533 * protocol family.
2534 *
2535 * optp: pointer to an integer that should be filled in with
2536 * appropriate option for setsockopt, as socket protocol
2537 * family.
2538 *
2539 * Return values:
2540 *
2541 * If the return value is 1, then all operations are
2542 * successful. If the
2543 * return value is -1, there was a syntax error in the
2544 * option, either unknown characters, or too many hosts.
2545 * If the return value is 0, one of the hostnames in the
2546 * path is unknown, and *cpp is set to point to the bad
2547 * hostname.
2548 *
2549 * *cpp: If *cpp was equal to NULL, it will be filled
2550 * in with a pointer to our static area that has
2551 * the option filled in. This will be 32bit aligned.
2552 *
2553 * *lenp: This will be filled in with how long the option
2554 * pointed to by *cpp is.
2555 *
2556 * *protop: This will be filled in with appropriate protocol for
2557 * setsockopt, as socket protocol family.
2558 *
2559 * *optp: This will be filled in with appropriate option for
2560 * setsockopt, as socket protocol family.
2561 */
2562 static int
2563 sourceroute(struct addrinfo *ai, char *arg, char **cpp, int *lenp, int *protop, int *optp)
2564 {
2565 static char buf[1024 + ALIGNBYTES]; /*XXX*/
2566 char *cp, *cp2, *lsrp, *ep;
2567 struct sockaddr_in *_sin;
2568 #ifdef INET6
2569 struct sockaddr_in6 *sin6;
2570 struct cmsghdr *cmsg;
2571 #endif
2572 struct addrinfo hints, *res;
2573 int error;
2574 char c;
2575
2576 /*
2577 * Verify the arguments, and make sure we have
2578 * at least 7 bytes for the option.
2579 */
2580 if (cpp == NULL || lenp == NULL)
2581 return -1;
2582 if (*cpp != NULL) {
2583 switch (res->ai_family) {
2584 case AF_INET:
2585 if (*lenp < 7)
2586 return -1;
2587 break;
2588 #ifdef INET6
2589 case AF_INET6:
2590 if (*lenp < (int)CMSG_SPACE(sizeof(struct ip6_rthdr) +
2591 sizeof(struct in6_addr)))
2592 return -1;
2593 break;
2594 #endif
2595 }
2596 }
2597 /*
2598 * Decide whether we have a buffer passed to us,
2599 * or if we need to use our own static buffer.
2600 */
2601 if (*cpp) {
2602 lsrp = *cpp;
2603 ep = lsrp + *lenp;
2604 } else {
2605 *cpp = lsrp = (char *)ALIGN(buf);
2606 ep = lsrp + 1024;
2607 }
2608
2609 cp = arg;
2610
2611 #ifdef INET6
2612 if (ai->ai_family == AF_INET6) {
2613 cmsg = inet6_rthdr_init(*cpp, IPV6_RTHDR_TYPE_0);
2614 if (*cp != '@')
2615 return -1;
2616 *protop = IPPROTO_IPV6;
2617 *optp = IPV6_PKTOPTIONS;
2618 } else
2619 #endif
2620 {
2621 /*
2622 * Next, decide whether we have a loose source
2623 * route or a strict source route, and fill in
2624 * the begining of the option.
2625 */
2626 if (*cp == '!') {
2627 cp++;
2628 *lsrp++ = IPOPT_SSRR;
2629 } else
2630 *lsrp++ = IPOPT_LSRR;
2631
2632 if (*cp != '@')
2633 return -1;
2634
2635 lsrp++; /* skip over length, we'll fill it in later */
2636 *lsrp++ = 4;
2637 *protop = IPPROTO_IP;
2638 *optp = IP_OPTIONS;
2639 }
2640
2641 cp++;
2642 memset(&hints, 0, sizeof(hints));
2643 hints.ai_family = ai->ai_family;
2644 hints.ai_socktype = SOCK_STREAM;
2645 for (c = 0;;) {
2646 if (
2647 #ifdef INET6
2648 ai->ai_family != AF_INET6 &&
2649 #endif
2650 c == ':')
2651 cp2 = 0;
2652 else for (cp2 = cp; (c = *cp2); cp2++) {
2653 if (c == ',') {
2654 *cp2++ = '\0';
2655 if (*cp2 == '@')
2656 cp2++;
2657 } else if (c == '@') {
2658 *cp2++ = '\0';
2659 } else if (
2660 #ifdef INET6
2661 ai->ai_family != AF_INET6 &&
2662 #endif
2663 c == ':') {
2664 *cp2++ = '\0';
2665 } else
2666 continue;
2667 break;
2668 }
2669 if (!c)
2670 cp2 = 0;
2671
2672 hints.ai_flags = AI_NUMERICHOST;
2673 error = getaddrinfo(cp, NULL, &hints, &res);
2674 if (error == EAI_NODATA) {
2675 hints.ai_flags = 0;
2676 error = getaddrinfo(cp, NULL, &hints, &res);
2677 }
2678 if (error != 0) {
2679 fprintf(stderr, "%s: %s\n", cp, gai_strerror(error));
2680 if (error == EAI_SYSTEM)
2681 fprintf(stderr, "%s: %s\n", cp,
2682 strerror(errno));
2683 *cpp = cp;
2684 return(0);
2685 }
2686 #ifdef INET6
2687 if (res->ai_family == AF_INET6) {
2688 sin6 = (struct sockaddr_in6 *)res->ai_addr;
2689 inet6_rthdr_add(cmsg, &sin6->sin6_addr,
2690 IPV6_RTHDR_LOOSE);
2691 } else
2692 #endif
2693 {
2694 _sin = (struct sockaddr_in *)res->ai_addr;
2695 memcpy(lsrp, (char *)&_sin->sin_addr, 4);
2696 lsrp += 4;
2697 }
2698 if (cp2)
2699 cp = cp2;
2700 else
2701 break;
2702 /*
2703 * Check to make sure there is space for next address
2704 */
2705 #ifdef INET6
2706 if (res->ai_family == AF_INET6) {
2707 if (((char *)CMSG_DATA(cmsg) +
2708 sizeof(struct ip6_rthdr) +
2709 ((inet6_rthdr_segments(cmsg) + 1) *
2710 sizeof(struct in6_addr))) > ep)
2711 return -1;
2712 } else
2713 #endif
2714 if (lsrp + 4 > ep)
2715 return -1;
2716 freeaddrinfo(res);
2717 }
2718 #ifdef INET6
2719 if (res->ai_family == AF_INET6) {
2720 inet6_rthdr_lasthop(cmsg, IPV6_RTHDR_LOOSE);
2721 *lenp = cmsg->cmsg_len;
2722 } else
2723 #endif
2724 {
2725 if ((*(*cpp+IPOPT_OLEN) = lsrp - *cpp) <= 7) {
2726 *cpp = 0;
2727 *lenp = 0;
2728 return -1;
2729 }
2730 *lsrp++ = IPOPT_NOP; /* 32 bit word align it */
2731 *lenp = lsrp - *cpp;
2732 }
2733 freeaddrinfo(res);
2734 return 1;
2735 }
MP support for (parts of) the network stack