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Merge branch 'master' of ssh://crater.dragonflybsd.org/repository/git/dragonfly
[dragonfly.git] / crypto / telnet / telnet / commands.c
blob990d0079b2f79f7a3e199a21b2273230b02e4825
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/crypto/telnet/telnet/commands.c,v 1.12.2.7 2003/04/23 07:16:32 ru Exp $
35 * $DragonFly: src/crypto/telnet/telnet/commands.c,v 1.3 2008/09/04 11:54:24 hasso 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 #ifdef AUTHENTICATION
68 #include <libtelnet/auth.h>
69 #endif
70 #ifdef ENCRYPTION
71 #include <libtelnet/encrypt.h>
72 #endif
73
74 #include <netinet/in_systm.h>
75 #include <netinet/ip.h>
76 #include <netinet/ip6.h>
77
78 #ifndef MAXHOSTNAMELEN
79 #define MAXHOSTNAMELEN 256
80 #endif /* MAXHOSTNAMELEN */
81
82 typedef int (*intrtn_t)(int, char **);
83
84 #ifdef AUTHENTICATION
85 extern int auth_togdebug(int);
86 #endif
87 #ifdef ENCRYPTION
88 extern int EncryptAutoEnc(int);
89 extern int EncryptAutoDec(int);
90 extern int EncryptDebug(int);
91 extern int EncryptVerbose(int);
92 #endif /* ENCRYPTION */
93 #if defined(IPPROTO_IP) && defined(IP_TOS)
94 int tos = -1;
95 #endif /* defined(IPPROTO_IP) && defined(IP_TOS) */
96
97 char *hostname;
98 static char _hostname[MAXHOSTNAMELEN];
99
100 static int help(int, char **);
101 static int call(intrtn_t, ...);
102 static void cmdrc(char *, char *);
103 #ifdef INET6
104 static int switch_af(struct addrinfo **);
105 #endif
106 static int togglehelp(void);
107 static int send_tncmd(void (*)(int, int), const char *, char *);
108 static int setmod(int);
109 static int clearmode(int);
110 static int modehelp(void);
111 static int sourceroute(struct addrinfo *, char *, char **, int *, int *, int *);
112
113 typedef struct {
114 const char *name; /* command name */
115 const char *help; /* help string (NULL for no help) */
116 int (*handler)(int, char **); /* routine which executes command */
117 int needconnect; /* Do we need to be connected to execute? */
118 } Command;
119
120 static char line[256];
121 static char saveline[256];
122 static int margc;
123 static char *margv[20];
124
125 #ifdef OPIE
126 #include <sys/wait.h>
127 #define PATH_OPIEKEY "/usr/bin/opiekey"
128 static int
129 opie_calc(int argc, char *argv[])
130 {
131 int status;
132
133 if(argc != 3) {
134 printf("%s sequence challenge\n", argv[0]);
135 return (0);
136 }
137
138 switch(fork()) {
139 case 0:
140 execv(PATH_OPIEKEY, argv);
141 exit (1);
142 case -1:
143 perror("fork");
144 break;
145 default:
146 (void) wait(&status);
147 if (WIFEXITED(status))
148 return (WEXITSTATUS(status));
149 }
150 return (0);
151 }
152 #endif
153
154 static void
155 makeargv(void)
156 {
157 char *cp, *cp2, c;
158 char **argp = margv;
159
160 margc = 0;
161 cp = line;
162 if (*cp == '!') { /* Special case shell escape */
163 strcpy(saveline, line); /* save for shell command */
164 *argp++ = strdup("!"); /* No room in string to get this */
165 margc++;
166 cp++;
167 }
168 while ((c = *cp)) {
169 int inquote = 0;
170 while (isspace(c))
171 c = *++cp;
172 if (c == '\0')
173 break;
174 *argp++ = cp;
175 margc += 1;
176 for (cp2 = cp; c != '\0'; c = *++cp) {
177 if (inquote) {
178 if (c == inquote) {
179 inquote = 0;
180 continue;
181 }
182 } else {
183 if (c == '\\') {
184 if ((c = *++cp) == '\0')
185 break;
186 } else if (c == '"') {
187 inquote = '"';
188 continue;
189 } else if (c == '\'') {
190 inquote = '\'';
191 continue;
192 } else if (isspace(c))
193 break;
194 }
195 *cp2++ = c;
196 }
197 *cp2 = '\0';
198 if (c == '\0')
199 break;
200 cp++;
201 }
202 *argp++ = 0;
203 }
204
205 /*
206 * Make a character string into a number.
207 *
208 * Todo: 1. Could take random integers (12, 0x12, 012, 0b1).
209 */
210
211 static int
212 special(char *s)
213 {
214 char c;
215 char b;
216
217 switch (*s) {
218 case '^':
219 b = *++s;
220 if (b == '?') {
221 c = b | 0x40; /* DEL */
222 } else {
223 c = b & 0x1f;
224 }
225 break;
226 default:
227 c = *s;
228 break;
229 }
230 return c;
231 }
232
233 /*
234 * Construct a control character sequence
235 * for a special character.
236 */
237 static const char *
238 control(cc_t c)
239 {
240 static char buf[5];
241 /*
242 * The only way I could get the Sun 3.5 compiler
243 * to shut up about
244 * if ((unsigned int)c >= 0x80)
245 * was to assign "c" to an unsigned int variable...
246 * Arggg....
247 */
248 unsigned int uic = (unsigned int)c;
249
250 if (uic == 0x7f)
251 return ("^?");
252 if (c == (cc_t)_POSIX_VDISABLE) {
253 return "off";
254 }
255 if (uic >= 0x80) {
256 buf[0] = '\\';
257 buf[1] = ((c>>6)&07) + '0';
258 buf[2] = ((c>>3)&07) + '0';
259 buf[3] = (c&07) + '0';
260 buf[4] = 0;
261 } else if (uic >= 0x20) {
262 buf[0] = c;
263 buf[1] = 0;
264 } else {
265 buf[0] = '^';
266 buf[1] = '@'+c;
267 buf[2] = 0;
268 }
269 return (buf);
270 }
271
272 /*
273 * The following are data structures and routines for
274 * the "send" command.
275 *
276 */
277
278 struct sendlist {
279 const char *name; /* How user refers to it (case independent) */
280 const char *help; /* Help information (0 ==> no help) */
281 int needconnect; /* Need to be connected */
282 int narg; /* Number of arguments */
283 int (*handler)(char *, ...); /* Routine to perform (for special ops) */
284 int nbyte; /* Number of bytes to send this command */
285 int what; /* Character to be sent (<0 ==> special) */
286 };
287 \f
288
289 static int
290 send_esc(void),
291 send_help(void),
292 send_docmd(char *),
293 send_dontcmd(char *),
294 send_willcmd(char *),
295 send_wontcmd(char *);
296
297 static struct sendlist Sendlist[] = {
298 { "ao", "Send Telnet Abort output", 1, 0, NULL, 2, AO },
299 { "ayt", "Send Telnet 'Are You There'", 1, 0, NULL, 2, AYT },
300 { "brk", "Send Telnet Break", 1, 0, NULL, 2, BREAK },
301 { "break", NULL, 1, 0, NULL, 2, BREAK },
302 { "ec", "Send Telnet Erase Character", 1, 0, NULL, 2, EC },
303 { "el", "Send Telnet Erase Line", 1, 0, NULL, 2, EL },
304 { "escape", "Send current escape character",1, 0, (int (*)(char *, ...))send_esc, 1, 0 },
305 { "ga", "Send Telnet 'Go Ahead' sequence", 1, 0, NULL, 2, GA },
306 { "ip", "Send Telnet Interrupt Process",1, 0, NULL, 2, IP },
307 { "intp", NULL, 1, 0, NULL, 2, IP },
308 { "interrupt", NULL, 1, 0, NULL, 2, IP },
309 { "intr", NULL, 1, 0, NULL, 2, IP },
310 { "nop", "Send Telnet 'No operation'", 1, 0, NULL, 2, NOP },
311 { "eor", "Send Telnet 'End of Record'", 1, 0, NULL, 2, EOR },
312 { "abort", "Send Telnet 'Abort Process'", 1, 0, NULL, 2, ABORT },
313 { "susp", "Send Telnet 'Suspend Process'",1, 0, NULL, 2, SUSP },
314 { "eof", "Send Telnet End of File Character", 1, 0, NULL, 2, xEOF },
315 { "synch", "Perform Telnet 'Synch operation'", 1, 0, (int (*)(char *, ...))dosynch, 2, 0 },
316 { "getstatus", "Send request for STATUS", 1, 0, (int (*)(char *, ...))get_status, 6, 0 },
317 { "?", "Display send options", 0, 0, (int (*)(char *, ...))send_help, 0, 0 },
318 { "help", NULL, 0, 0, (int (*)(char *, ...))send_help, 0, 0 },
319 { "do", NULL, 0, 1, (int (*)(char *, ...))send_docmd, 3, 0 },
320 { "dont", NULL, 0, 1, (int (*)(char *, ...))send_dontcmd, 3, 0 },
321 { "will", NULL, 0, 1, (int (*)(char *, ...))send_willcmd, 3, 0 },
322 { "wont", NULL, 0, 1, (int (*)(char *, ...))send_wontcmd, 3, 0 },
323 { NULL, NULL, 0, 0, NULL, 0, 0 }
324 };
325
326 #define GETSEND(name) ((struct sendlist *) genget(name, (char **) Sendlist, \
327 sizeof(struct sendlist)))
328
329 static int
330 sendcmd(int argc, char *argv[])
331 {
332 int count; /* how many bytes we are going to need to send */
333 int i;
334 struct sendlist *s; /* pointer to current command */
335 int success = 0;
336 int needconnect = 0;
337
338 if (argc < 2) {
339 printf("need at least one argument for 'send' command\n");
340 printf("'send ?' for help\n");
341 return 0;
342 }
343 /*
344 * First, validate all the send arguments.
345 * In addition, we see how much space we are going to need, and
346 * whether or not we will be doing a "SYNCH" operation (which
347 * flushes the network queue).
348 */
349 count = 0;
350 for (i = 1; i < argc; i++) {
351 s = GETSEND(argv[i]);
352 if (s == 0) {
353 printf("Unknown send argument '%s'\n'send ?' for help.\n",
354 argv[i]);
355 return 0;
356 } else if (Ambiguous((void *)s)) {
357 printf("Ambiguous send argument '%s'\n'send ?' for help.\n",
358 argv[i]);
359 return 0;
360 }
361 if (i + s->narg >= argc) {
362 fprintf(stderr,
363 "Need %d argument%s to 'send %s' command. 'send %s ?' for help.\n",
364 s->narg, s->narg == 1 ? "" : "s", s->name, s->name);
365 return 0;
366 }
367 count += s->nbyte;
368 if ((void *)s->handler == (void *)send_help) {
369 send_help();
370 return 0;
371 }
372
373 i += s->narg;
374 needconnect += s->needconnect;
375 }
376 if (!connected && needconnect) {
377 printf("?Need to be connected first.\n");
378 printf("'send ?' for help\n");
379 return 0;
380 }
381 /* Now, do we have enough room? */
382 if (NETROOM() < count) {
383 printf("There is not enough room in the buffer TO the network\n");
384 printf("to process your request. Nothing will be done.\n");
385 printf("('send synch' will throw away most data in the network\n");
386 printf("buffer, if this might help.)\n");
387 return 0;
388 }
389 /* OK, they are all OK, now go through again and actually send */
390 count = 0;
391 for (i = 1; i < argc; i++) {
392 if ((s = GETSEND(argv[i])) == 0) {
393 fprintf(stderr, "Telnet 'send' error - argument disappeared!\n");
394 quit();
395 /*NOTREACHED*/
396 }
397 if (s->handler) {
398 count++;
399 success += (*s->handler)((s->narg > 0) ? argv[i+1] : 0,
400 (s->narg > 1) ? argv[i+2] : 0);
401 i += s->narg;
402 } else {
403 NET2ADD(IAC, s->what);
404 printoption("SENT", IAC, s->what);
405 }
406 }
407 return (count == success);
408 }
409
410 static int
411 send_esc(void)
412 {
413 NETADD(escape);
414 return 1;
415 }
416
417 static int
418 send_docmd(char *name)
419 {
420 return(send_tncmd(send_do, "do", name));
421 }
422
423 static int
424 send_dontcmd(name)
425 char *name;
426 {
427 return(send_tncmd(send_dont, "dont", name));
428 }
429
430 static int
431 send_willcmd(char *name)
432 {
433 return(send_tncmd(send_will, "will", name));
434 }
435
436 static int
437 send_wontcmd(char *name)
438 {
439 return(send_tncmd(send_wont, "wont", name));
440 }
441
442 static int
443 send_tncmd(void (*func)(int, int), const char *cmd, char *name)
444 {
445 char **cpp;
446 extern char *telopts[];
447 int val = 0;
448
449 if (isprefix(name, "help") || isprefix(name, "?")) {
450 int col, len;
451
452 printf("Usage: send %s <value|option>\n", cmd);
453 printf("\"value\" must be from 0 to 255\n");
454 printf("Valid options are:\n\t");
455
456 col = 8;
457 for (cpp = telopts; *cpp; cpp++) {
458 len = strlen(*cpp) + 3;
459 if (col + len > 65) {
460 printf("\n\t");
461 col = 8;
462 }
463 printf(" \"%s\"", *cpp);
464 col += len;
465 }
466 printf("\n");
467 return 0;
468 }
469 cpp = (char **)genget(name, telopts, sizeof(char *));
470 if (Ambiguous(cpp)) {
471 fprintf(stderr,"'%s': ambiguous argument ('send %s ?' for help).\n",
472 name, cmd);
473 return 0;
474 }
475 if (cpp) {
476 val = cpp - telopts;
477 } else {
478 char *cp = name;
479
480 while (*cp >= '0' && *cp <= '9') {
481 val *= 10;
482 val += *cp - '0';
483 cp++;
484 }
485 if (*cp != 0) {
486 fprintf(stderr, "'%s': unknown argument ('send %s ?' for help).\n",
487 name, cmd);
488 return 0;
489 } else if (val < 0 || val > 255) {
490 fprintf(stderr, "'%s': bad value ('send %s ?' for help).\n",
491 name, cmd);
492 return 0;
493 }
494 }
495 if (!connected) {
496 printf("?Need to be connected first.\n");
497 return 0;
498 }
499 (*func)(val, 1);
500 return 1;
501 }
502
503 static int
504 send_help(void)
505 {
506 struct sendlist *s; /* pointer to current command */
507 for (s = Sendlist; s->name; s++) {
508 if (s->help)
509 printf("%-15s %s\n", s->name, s->help);
510 }
511 return(0);
512 }
513 \f
514 /*
515 * The following are the routines and data structures referred
516 * to by the arguments to the "toggle" command.
517 */
518
519 static int
520 lclchars(void)
521 {
522 donelclchars = 1;
523 return 1;
524 }
525
526 static int
527 togdebug(void)
528 {
529 #ifndef NOT43
530 if (net > 0 &&
531 (SetSockOpt(net, SOL_SOCKET, SO_DEBUG, debug)) < 0) {
532 perror("setsockopt (SO_DEBUG)");
533 }
534 #else /* NOT43 */
535 if (debug) {
536 if (net > 0 && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 1) < 0)
537 perror("setsockopt (SO_DEBUG)");
538 } else
539 printf("Cannot turn off socket debugging\n");
540 #endif /* NOT43 */
541 return 1;
542 }
543
544
545 static int
546 togcrlf(void)
547 {
548 if (crlf) {
549 printf("Will send carriage returns as telnet <CR><LF>.\n");
550 } else {
551 printf("Will send carriage returns as telnet <CR><NUL>.\n");
552 }
553 return 1;
554 }
555
556 int binmode;
557
558 static int
559 togbinary(int val)
560 {
561 donebinarytoggle = 1;
562
563 if (val >= 0) {
564 binmode = val;
565 } else {
566 if (my_want_state_is_will(TELOPT_BINARY) &&
567 my_want_state_is_do(TELOPT_BINARY)) {
568 binmode = 1;
569 } else if (my_want_state_is_wont(TELOPT_BINARY) &&
570 my_want_state_is_dont(TELOPT_BINARY)) {
571 binmode = 0;
572 }
573 val = binmode ? 0 : 1;
574 }
575
576 if (val == 1) {
577 if (my_want_state_is_will(TELOPT_BINARY) &&
578 my_want_state_is_do(TELOPT_BINARY)) {
579 printf("Already operating in binary mode with remote host.\n");
580 } else {
581 printf("Negotiating binary mode with remote host.\n");
582 tel_enter_binary(3);
583 }
584 } else {
585 if (my_want_state_is_wont(TELOPT_BINARY) &&
586 my_want_state_is_dont(TELOPT_BINARY)) {
587 printf("Already in network ascii mode with remote host.\n");
588 } else {
589 printf("Negotiating network ascii mode with remote host.\n");
590 tel_leave_binary(3);
591 }
592 }
593 return 1;
594 }
595
596 static int
597 togrbinary(int val)
598 {
599 donebinarytoggle = 1;
600
601 if (val == -1)
602 val = my_want_state_is_do(TELOPT_BINARY) ? 0 : 1;
603
604 if (val == 1) {
605 if (my_want_state_is_do(TELOPT_BINARY)) {
606 printf("Already receiving in binary mode.\n");
607 } else {
608 printf("Negotiating binary mode on input.\n");
609 tel_enter_binary(1);
610 }
611 } else {
612 if (my_want_state_is_dont(TELOPT_BINARY)) {
613 printf("Already receiving in network ascii mode.\n");
614 } else {
615 printf("Negotiating network ascii mode on input.\n");
616 tel_leave_binary(1);
617 }
618 }
619 return 1;
620 }
621
622 static int
623 togxbinary(int val)
624 {
625 donebinarytoggle = 1;
626
627 if (val == -1)
628 val = my_want_state_is_will(TELOPT_BINARY) ? 0 : 1;
629
630 if (val == 1) {
631 if (my_want_state_is_will(TELOPT_BINARY)) {
632 printf("Already transmitting in binary mode.\n");
633 } else {
634 printf("Negotiating binary mode on output.\n");
635 tel_enter_binary(2);
636 }
637 } else {
638 if (my_want_state_is_wont(TELOPT_BINARY)) {
639 printf("Already transmitting in network ascii mode.\n");
640 } else {
641 printf("Negotiating network ascii mode on output.\n");
642 tel_leave_binary(2);
643 }
644 }
645 return 1;
646 }
647
648 struct togglelist {
649 const char *name; /* name of toggle */
650 const char *help; /* help message */
651 int (*handler)(int); /* routine to do actual setting */
652 int *variable;
653 const char *actionexplanation;
654 };
655
656 static struct togglelist Togglelist[] = {
657 { "autoflush",
658 "flushing of output when sending interrupt characters",
659 0,
660 &autoflush,
661 "flush output when sending interrupt characters" },
662 { "autosynch",
663 "automatic sending of interrupt characters in urgent mode",
664 0,
665 &autosynch,
666 "send interrupt characters in urgent mode" },
667 #ifdef AUTHENTICATION
668 { "autologin",
669 "automatic sending of login and/or authentication info",
670 0,
671 &autologin,
672 "send login name and/or authentication information" },
673 { "authdebug",
674 "Toggle authentication debugging",
675 auth_togdebug,
676 0,
677 "print authentication debugging information" },
678 #endif
679 #ifdef ENCRYPTION
680 { "autoencrypt",
681 "automatic encryption of data stream",
682 EncryptAutoEnc,
683 0,
684 "automatically encrypt output" },
685 { "autodecrypt",
686 "automatic decryption of data stream",
687 EncryptAutoDec,
688 0,
689 "automatically decrypt input" },
690 { "verbose_encrypt",
691 "Toggle verbose encryption output",
692 EncryptVerbose,
693 0,
694 "print verbose encryption output" },
695 { "encdebug",
696 "Toggle encryption debugging",
697 EncryptDebug,
698 0,
699 "print encryption debugging information" },
700 #endif /* ENCRYPTION */
701 { "skiprc",
702 "don't read ~/.telnetrc file",
703 0,
704 &skiprc,
705 "skip reading of ~/.telnetrc file" },
706 { "binary",
707 "sending and receiving of binary data",
708 togbinary,
709 0,
710 0 },
711 { "inbinary",
712 "receiving of binary data",
713 togrbinary,
714 0,
715 0 },
716 { "outbinary",
717 "sending of binary data",
718 togxbinary,
719 0,
720 0 },
721 { "crlf",
722 "sending carriage returns as telnet <CR><LF>",
723 (int (*)(int))togcrlf,
724 &crlf,
725 0 },
726 { "crmod",
727 "mapping of received carriage returns",
728 0,
729 &crmod,
730 "map carriage return on output" },
731 { "localchars",
732 "local recognition of certain control characters",
733 (int (*)(int))lclchars,
734 &localchars,
735 "recognize certain control characters" },
736 { " ", "", NULL, NULL, NULL }, /* empty line */
737 { "debug",
738 "debugging",
739 (int (*)(int))togdebug,
740 &debug,
741 "turn on socket level debugging" },
742 { "netdata",
743 "printing of hexadecimal network data (debugging)",
744 0,
745 &netdata,
746 "print hexadecimal representation of network traffic" },
747 { "prettydump",
748 "output of \"netdata\" to user readable format (debugging)",
749 0,
750 &prettydump,
751 "print user readable output for \"netdata\"" },
752 { "options",
753 "viewing of options processing (debugging)",
754 0,
755 &showoptions,
756 "show option processing" },
757 { "termdata",
758 "(debugging) toggle printing of hexadecimal terminal data",
759 0,
760 &termdata,
761 "print hexadecimal representation of terminal traffic" },
762 { "?",
763 NULL,
764 (int (*)(int))togglehelp,
765 NULL,
766 NULL },
767 { NULL, NULL, NULL, NULL, NULL },
768 { "help",
769 NULL,
770 (int (*)(int))togglehelp,
771 NULL,
772 NULL },
773 { NULL, NULL, NULL, NULL, NULL }
774 };
775
776 static int
777 togglehelp(void)
778 {
779 struct togglelist *c;
780
781 for (c = Togglelist; c->name; c++) {
782 if (c->help) {
783 if (*c->help)
784 printf("%-15s toggle %s\n", c->name, c->help);
785 else
786 printf("\n");
787 }
788 }
789 printf("\n");
790 printf("%-15s %s\n", "?", "display help information");
791 return 0;
792 }
793
794 static void
795 settogglehelp(int set)
796 {
797 struct togglelist *c;
798
799 for (c = Togglelist; c->name; c++) {
800 if (c->help) {
801 if (*c->help)
802 printf("%-15s %s %s\n", c->name, set ? "enable" : "disable",
803 c->help);
804 else
805 printf("\n");
806 }
807 }
808 }
809
810 #define GETTOGGLE(name) (struct togglelist *) \
811 genget(name, (char **) Togglelist, sizeof(struct togglelist))
812
813 static int
814 toggle(int argc, char *argv[])
815 {
816 int retval = 1;
817 char *name;
818 struct togglelist *c;
819
820 if (argc < 2) {
821 fprintf(stderr,
822 "Need an argument to 'toggle' command. 'toggle ?' for help.\n");
823 return 0;
824 }
825 argc--;
826 argv++;
827 while (argc--) {
828 name = *argv++;
829 c = GETTOGGLE(name);
830 if (Ambiguous((void *)c)) {
831 fprintf(stderr, "'%s': ambiguous argument ('toggle ?' for help).\n",
832 name);
833 return 0;
834 } else if (c == 0) {
835 fprintf(stderr, "'%s': unknown argument ('toggle ?' for help).\n",
836 name);
837 return 0;
838 } else {
839 if (c->variable) {
840 *c->variable = !*c->variable; /* invert it */
841 if (c->actionexplanation) {
842 printf("%s %s.\n", *c->variable? "Will" : "Won't",
843 c->actionexplanation);
844 }
845 }
846 if (c->handler) {
847 retval &= (*c->handler)(-1);
848 }
849 }
850 }
851 return retval;
852 }
853 \f
854 /*
855 * The following perform the "set" command.
856 */
857
858 #ifdef USE_TERMIO
859 struct termio new_tc = { 0, 0, 0, 0, {}, 0, 0 };
860 #endif
861
862 struct setlist {
863 const char *name; /* name */
864 const char *help; /* help information */
865 void (*handler)(char *);
866 cc_t *charp; /* where it is located at */
867 };
868
869 static struct setlist Setlist[] = {
870 #ifdef KLUDGELINEMODE
871 { "echo", "character to toggle local echoing on/off", NULL, &echoc },
872 #endif
873 { "escape", "character to escape back to telnet command mode", NULL, &escape },
874 { "rlogin", "rlogin escape character", 0, &rlogin },
875 { "tracefile", "file to write trace information to", SetNetTrace, (cc_t *)NetTraceFile},
876 { " ", "", NULL, NULL },
877 { " ", "The following need 'localchars' to be toggled true", NULL, NULL },
878 { "flushoutput", "character to cause an Abort Output", NULL, termFlushCharp },
879 { "interrupt", "character to cause an Interrupt Process", NULL, termIntCharp },
880 { "quit", "character to cause an Abort process", NULL, termQuitCharp },
881 { "eof", "character to cause an EOF ", NULL, termEofCharp },
882 { " ", "", NULL, NULL },
883 { " ", "The following are for local editing in linemode", NULL, NULL },
884 { "erase", "character to use to erase a character", NULL, termEraseCharp },
885 { "kill", "character to use to erase a line", NULL, termKillCharp },
886 { "lnext", "character to use for literal next", NULL, termLiteralNextCharp },
887 { "susp", "character to cause a Suspend Process", NULL, termSuspCharp },
888 { "reprint", "character to use for line reprint", NULL, termRprntCharp },
889 { "worderase", "character to use to erase a word", NULL, termWerasCharp },
890 { "start", "character to use for XON", NULL, termStartCharp },
891 { "stop", "character to use for XOFF", NULL, termStopCharp },
892 { "forw1", "alternate end of line character", NULL, termForw1Charp },
893 { "forw2", "alternate end of line character", NULL, termForw2Charp },
894 { "ayt", "alternate AYT character", NULL, termAytCharp },
895 { NULL, NULL, NULL, NULL }
896 };
897
898 static struct setlist *
899 getset(char *name)
900 {
901 return (struct setlist *)
902 genget(name, (char **) Setlist, sizeof(struct setlist));
903 }
904
905 void
906 set_escape_char(char *s)
907 {
908 if (rlogin != _POSIX_VDISABLE) {
909 rlogin = (s && *s) ? special(s) : _POSIX_VDISABLE;
910 printf("Telnet rlogin escape character is '%s'.\n",
911 control(rlogin));
912 } else {
913 escape = (s && *s) ? special(s) : _POSIX_VDISABLE;
914 printf("Telnet escape character is '%s'.\n", control(escape));
915 }
916 }
917
918 static int
919 setcmd(int argc, char *argv[])
920 {
921 int value;
922 struct setlist *ct;
923 struct togglelist *c;
924
925 if (argc < 2 || argc > 3) {
926 printf("Format is 'set Name Value'\n'set ?' for help.\n");
927 return 0;
928 }
929 if ((argc == 2) && (isprefix(argv[1], "?") || isprefix(argv[1], "help"))) {
930 for (ct = Setlist; ct->name; ct++)
931 printf("%-15s %s\n", ct->name, ct->help);
932 printf("\n");
933 settogglehelp(1);
934 printf("%-15s %s\n", "?", "display help information");
935 return 0;
936 }
937
938 ct = getset(argv[1]);
939 if (ct == 0) {
940 c = GETTOGGLE(argv[1]);
941 if (c == 0) {
942 fprintf(stderr, "'%s': unknown argument ('set ?' for help).\n",
943 argv[1]);
944 return 0;
945 } else if (Ambiguous((void *)c)) {
946 fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n",
947 argv[1]);
948 return 0;
949 }
950 if (c->variable) {
951 if ((argc == 2) || (strcmp("on", argv[2]) == 0))
952 *c->variable = 1;
953 else if (strcmp("off", argv[2]) == 0)
954 *c->variable = 0;
955 else {
956 printf("Format is 'set togglename [on|off]'\n'set ?' for help.\n");
957 return 0;
958 }
959 if (c->actionexplanation) {
960 printf("%s %s.\n", *c->variable? "Will" : "Won't",
961 c->actionexplanation);
962 }
963 }
964 if (c->handler)
965 (*c->handler)(1);
966 } else if (argc != 3) {
967 printf("Format is 'set Name Value'\n'set ?' for help.\n");
968 return 0;
969 } else if (Ambiguous((void *)ct)) {
970 fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n",
971 argv[1]);
972 return 0;
973 } else if (ct->handler) {
974 (*ct->handler)(argv[2]);
975 printf("%s set to \"%s\".\n", ct->name, (char *)ct->charp);
976 } else {
977 if (strcmp("off", argv[2])) {
978 value = special(argv[2]);
979 } else {
980 value = _POSIX_VDISABLE;
981 }
982 *(ct->charp) = (cc_t)value;
983 printf("%s character is '%s'.\n", ct->name, control(*(ct->charp)));
984 }
985 slc_check();
986 return 1;
987 }
988
989 static int
990 unsetcmd(int argc, char *argv[])
991 {
992 struct setlist *ct;
993 struct togglelist *c;
994 char *name;
995
996 if (argc < 2) {
997 fprintf(stderr,
998 "Need an argument to 'unset' command. 'unset ?' for help.\n");
999 return 0;
1000 }
1001 if (isprefix(argv[1], "?") || isprefix(argv[1], "help")) {
1002 for (ct = Setlist; ct->name; ct++)
1003 printf("%-15s %s\n", ct->name, ct->help);
1004 printf("\n");
1005 settogglehelp(0);
1006 printf("%-15s %s\n", "?", "display help information");
1007 return 0;
1008 }
1009
1010 argc--;
1011 argv++;
1012 while (argc--) {
1013 name = *argv++;
1014 ct = getset(name);
1015 if (ct == 0) {
1016 c = GETTOGGLE(name);
1017 if (c == 0) {
1018 fprintf(stderr, "'%s': unknown argument ('unset ?' for help).\n",
1019 name);
1020 return 0;
1021 } else if (Ambiguous((void *)c)) {
1022 fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\n",
1023 name);
1024 return 0;
1025 }
1026 if (c->variable) {
1027 *c->variable = 0;
1028 if (c->actionexplanation) {
1029 printf("%s %s.\n", *c->variable? "Will" : "Won't",
1030 c->actionexplanation);
1031 }
1032 }
1033 if (c->handler)
1034 (*c->handler)(0);
1035 } else if (Ambiguous((void *)ct)) {
1036 fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\n",
1037 name);
1038 return 0;
1039 } else if (ct->handler) {
1040 (*ct->handler)(0);
1041 printf("%s reset to \"%s\".\n", ct->name, (char *)ct->charp);
1042 } else {
1043 *(ct->charp) = _POSIX_VDISABLE;
1044 printf("%s character is '%s'.\n", ct->name, control(*(ct->charp)));
1045 }
1046 }
1047 return 1;
1048 }
1049 \f
1050 /*
1051 * The following are the data structures and routines for the
1052 * 'mode' command.
1053 */
1054 #ifdef KLUDGELINEMODE
1055 extern int kludgelinemode;
1056
1057 static int
1058 dokludgemode(void)
1059 {
1060 kludgelinemode = 1;
1061 send_wont(TELOPT_LINEMODE, 1);
1062 send_dont(TELOPT_SGA, 1);
1063 send_dont(TELOPT_ECHO, 1);
1064 return 1;
1065 }
1066 #endif
1067
1068 static int
1069 dolinemode(void)
1070 {
1071 #ifdef KLUDGELINEMODE
1072 if (kludgelinemode)
1073 send_dont(TELOPT_SGA, 1);
1074 #endif
1075 send_will(TELOPT_LINEMODE, 1);
1076 send_dont(TELOPT_ECHO, 1);
1077 return 1;
1078 }
1079
1080 static int
1081 docharmode(void)
1082 {
1083 #ifdef KLUDGELINEMODE
1084 if (kludgelinemode)
1085 send_do(TELOPT_SGA, 1);
1086 else
1087 #endif
1088 send_wont(TELOPT_LINEMODE, 1);
1089 send_do(TELOPT_ECHO, 1);
1090 return 1;
1091 }
1092
1093 static int
1094 dolmmode(int bit, int on)
1095 {
1096 unsigned char c;
1097 extern int linemode;
1098
1099 if (my_want_state_is_wont(TELOPT_LINEMODE)) {
1100 printf("?Need to have LINEMODE option enabled first.\n");
1101 printf("'mode ?' for help.\n");
1102 return 0;
1103 }
1104
1105 if (on)
1106 c = (linemode | bit);
1107 else
1108 c = (linemode & ~bit);
1109 lm_mode(&c, 1, 1);
1110 return 1;
1111 }
1112
1113 static int
1114 setmod(int bit)
1115 {
1116 return dolmmode(bit, 1);
1117 }
1118
1119 static int
1120 clearmode(int bit)
1121 {
1122 return dolmmode(bit, 0);
1123 }
1124
1125 struct modelist {
1126 const char *name; /* command name */
1127 const char *help; /* help string */
1128 int (*handler)(int);/* routine which executes command */
1129 int needconnect; /* Do we need to be connected to execute? */
1130 int arg1;
1131 };
1132
1133 static struct modelist ModeList[] = {
1134 { "character", "Disable LINEMODE option", (int (*)(int))docharmode, 1, 0 },
1135 #ifdef KLUDGELINEMODE
1136 { "", "(or disable obsolete line-by-line mode)", NULL, 0, 0 },
1137 #endif
1138 { "line", "Enable LINEMODE option", (int (*)(int))dolinemode, 1, 0 },
1139 #ifdef KLUDGELINEMODE
1140 { "", "(or enable obsolete line-by-line mode)", NULL, 0, 0 },
1141 #endif
1142 { "", "", NULL, 0, 0 },
1143 { "", "These require the LINEMODE option to be enabled", NULL, 0, 0 },
1144 { "isig", "Enable signal trapping", setmod, 1, MODE_TRAPSIG },
1145 { "+isig", 0, setmod, 1, MODE_TRAPSIG },
1146 { "-isig", "Disable signal trapping", clearmode, 1, MODE_TRAPSIG },
1147 { "edit", "Enable character editing", setmod, 1, MODE_EDIT },
1148 { "+edit", 0, setmod, 1, MODE_EDIT },
1149 { "-edit", "Disable character editing", clearmode, 1, MODE_EDIT },
1150 { "softtabs", "Enable tab expansion", setmod, 1, MODE_SOFT_TAB },
1151 { "+softtabs", 0, setmod, 1, MODE_SOFT_TAB },
1152 { "-softtabs", "Disable character editing", clearmode, 1, MODE_SOFT_TAB },
1153 { "litecho", "Enable literal character echo", setmod, 1, MODE_LIT_ECHO },
1154 { "+litecho", 0, setmod, 1, MODE_LIT_ECHO },
1155 { "-litecho", "Disable literal character echo", clearmode, 1, MODE_LIT_ECHO },
1156 { "help", 0, (int (*)(int))modehelp, 0, 0 },
1157 #ifdef KLUDGELINEMODE
1158 { "kludgeline", 0, (int (*)(int))dokludgemode, 1, 0 },
1159 #endif
1160 { "", "", NULL, 0, 0 },
1161 { "?", "Print help information", (int (*)(int))modehelp, 0, 0 },
1162 { NULL, NULL, NULL, 0, 0 },
1163 };
1164
1165
1166 static int
1167 modehelp(void)
1168 {
1169 struct modelist *mt;
1170
1171 printf("format is: 'mode Mode', where 'Mode' is one of:\n\n");
1172 for (mt = ModeList; mt->name; mt++) {
1173 if (mt->help) {
1174 if (*mt->help)
1175 printf("%-15s %s\n", mt->name, mt->help);
1176 else
1177 printf("\n");
1178 }
1179 }
1180 return 0;
1181 }
1182
1183 #define GETMODECMD(name) (struct modelist *) \
1184 genget(name, (char **) ModeList, sizeof(struct modelist))
1185
1186 static int
1187 modecmd(int argc, char *argv[])
1188 {
1189 struct modelist *mt;
1190
1191 if (argc != 2) {
1192 printf("'mode' command requires an argument\n");
1193 printf("'mode ?' for help.\n");
1194 } else if ((mt = GETMODECMD(argv[1])) == 0) {
1195 fprintf(stderr, "Unknown mode '%s' ('mode ?' for help).\n", argv[1]);
1196 } else if (Ambiguous((void *)mt)) {
1197 fprintf(stderr, "Ambiguous mode '%s' ('mode ?' for help).\n", argv[1]);
1198 } else if (mt->needconnect && !connected) {
1199 printf("?Need to be connected first.\n");
1200 printf("'mode ?' for help.\n");
1201 } else if (mt->handler) {
1202 return (*mt->handler)(mt->arg1);
1203 }
1204 return 0;
1205 }
1206 \f
1207 /*
1208 * The following data structures and routines implement the
1209 * "display" command.
1210 */
1211
1212 static int
1213 display(int argc, char *argv[])
1214 {
1215 struct togglelist *tl;
1216 struct setlist *sl;
1217
1218 #define dotog(tl) if (tl->variable && tl->actionexplanation) { \
1219 if (*tl->variable) { \
1220 printf("will"); \
1221 } else { \
1222 printf("won't"); \
1223 } \
1224 printf(" %s.\n", tl->actionexplanation); \
1225 }
1226
1227 #define doset(sl) if (sl->name && *sl->name != ' ') { \
1228 if (sl->handler == 0) \
1229 printf("%-15s [%s]\n", sl->name, control(*sl->charp)); \
1230 else \
1231 printf("%-15s \"%s\"\n", sl->name, (char *)sl->charp); \
1232 }
1233
1234 if (argc == 1) {
1235 for (tl = Togglelist; tl->name; tl++) {
1236 dotog(tl);
1237 }
1238 printf("\n");
1239 for (sl = Setlist; sl->name; sl++) {
1240 doset(sl);
1241 }
1242 } else {
1243 int i;
1244
1245 for (i = 1; i < argc; i++) {
1246 sl = getset(argv[i]);
1247 tl = GETTOGGLE(argv[i]);
1248 if (Ambiguous((void *)sl) || Ambiguous((void *)tl)) {
1249 printf("?Ambiguous argument '%s'.\n", argv[i]);
1250 return 0;
1251 } else if (!sl && !tl) {
1252 printf("?Unknown argument '%s'.\n", argv[i]);
1253 return 0;
1254 } else {
1255 if (tl) {
1256 dotog(tl);
1257 }
1258 if (sl) {
1259 doset(sl);
1260 }
1261 }
1262 }
1263 }
1264 /*@*/optionstatus();
1265 #ifdef ENCRYPTION
1266 EncryptStatus();
1267 #endif /* ENCRYPTION */
1268 return 1;
1269 #undef doset
1270 #undef dotog
1271 }
1272 \f
1273 /*
1274 * The following are the data structures, and many of the routines,
1275 * relating to command processing.
1276 */
1277
1278 /*
1279 * Set the escape character.
1280 */
1281 static int
1282 setescape(int argc, char *argv[])
1283 {
1284 char *arg;
1285 char buf[50];
1286
1287 printf(
1288 "Deprecated usage - please use 'set escape%s%s' in the future.\n",
1289 (argc > 2)? " ":"", (argc > 2)? argv[1]: "");
1290 if (argc > 2)
1291 arg = argv[1];
1292 else {
1293 printf("new escape character: ");
1294 (void) fgets(buf, sizeof(buf), stdin);
1295 arg = buf;
1296 }
1297 if (arg[0] != '\0')
1298 escape = arg[0];
1299 (void) fflush(stdout);
1300 return 1;
1301 }
1302
1303 static int
1304 togcrmod(void)
1305 {
1306 crmod = !crmod;
1307 printf("Deprecated usage - please use 'toggle crmod' in the future.\n");
1308 printf("%s map carriage return on output.\n", crmod ? "Will" : "Won't");
1309 (void) fflush(stdout);
1310 return 1;
1311 }
1312
1313 static int
1314 suspend(void)
1315 {
1316 #ifdef SIGTSTP
1317 setcommandmode();
1318 {
1319 long oldrows, oldcols, newrows, newcols, err_;
1320
1321 err_ = (TerminalWindowSize(&oldrows, &oldcols) == 0) ? 1 : 0;
1322 (void) kill(0, SIGTSTP);
1323 /*
1324 * If we didn't get the window size before the SUSPEND, but we
1325 * can get them now (?), then send the NAWS to make sure that
1326 * we are set up for the right window size.
1327 */
1328 if (TerminalWindowSize(&newrows, &newcols) && connected &&
1329 (err_ || ((oldrows != newrows) || (oldcols != newcols)))) {
1330 sendnaws();
1331 }
1332 }
1333 /* reget parameters in case they were changed */
1334 TerminalSaveState();
1335 setconnmode(0);
1336 #else
1337 printf("Suspend is not supported. Try the '!' command instead\n");
1338 #endif
1339 return 1;
1340 }
1341
1342 static int
1343 shell(int argc, char *argv[] __unused)
1344 {
1345 long oldrows, oldcols, newrows, newcols, err_;
1346
1347 setcommandmode();
1348
1349 err_ = (TerminalWindowSize(&oldrows, &oldcols) == 0) ? 1 : 0;
1350 switch(vfork()) {
1351 case -1:
1352 perror("Fork failed\n");
1353 break;
1354
1355 case 0:
1356 {
1357 /*
1358 * Fire up the shell in the child.
1359 */
1360 const char *shellp, *shellname;
1361
1362 shellp = getenv("SHELL");
1363 if (shellp == NULL)
1364 shellp = "/bin/sh";
1365 if ((shellname = strrchr(shellp, '/')) == 0)
1366 shellname = shellp;
1367 else
1368 shellname++;
1369 if (argc > 1)
1370 execl(shellp, shellname, "-c", &saveline[1], (char *)0);
1371 else
1372 execl(shellp, shellname, (char *)0);
1373 perror("Execl");
1374 _exit(1);
1375 }
1376 default:
1377 (void)wait((int *)0); /* Wait for the shell to complete */
1378
1379 if (TerminalWindowSize(&newrows, &newcols) && connected &&
1380 (err_ || ((oldrows != newrows) || (oldcols != newcols)))) {
1381 sendnaws();
1382 }
1383 break;
1384 }
1385 return 1;
1386 }
1387
1388 static int
1389 bye(int argc, char *argv[])
1390 {
1391 extern int resettermname;
1392
1393 if (connected) {
1394 (void) shutdown(net, 2);
1395 printf("Connection closed.\n");
1396 (void) NetClose(net);
1397 connected = 0;
1398 resettermname = 1;
1399 #ifdef AUTHENTICATION
1400 #ifdef ENCRYPTION
1401 auth_encrypt_connect(connected);
1402 #endif
1403 #endif
1404 /* reset options */
1405 tninit();
1406 }
1407 if ((argc != 2) || (strcmp(argv[1], "fromquit") != 0)) {
1408 longjmp(toplevel, 1);
1409 /* NOTREACHED */
1410 }
1411 return 1; /* Keep lint, etc., happy */
1412 }
1413
1414 void
1415 quit(void)
1416 {
1417 (void) call(bye, "bye", "fromquit", 0);
1418 Exit(0);
1419 }
1420
1421 static int
1422 logout(void)
1423 {
1424 send_do(TELOPT_LOGOUT, 1);
1425 (void) netflush();
1426 return 1;
1427 }
1428
1429 \f
1430 /*
1431 * The SLC command.
1432 */
1433
1434 struct slclist {
1435 const char *name;
1436 const char *help;
1437 void (*handler)(int);
1438 int arg;
1439 };
1440
1441 static void slc_help(void);
1442
1443 struct slclist SlcList[] = {
1444 { "export", "Use local special character definitions",
1445 (void (*)(int))slc_mode_export, 0 },
1446 { "import", "Use remote special character definitions",
1447 slc_mode_import, 1 },
1448 { "check", "Verify remote special character definitions",
1449 slc_mode_import, 0 },
1450 { "help", NULL, (void (*)(int))slc_help, 0 },
1451 { "?", "Print help information", (void (*)(int))slc_help, 0 },
1452 { NULL, NULL, NULL, 0 },
1453 };
1454
1455 static void
1456 slc_help(void)
1457 {
1458 struct slclist *c;
1459
1460 for (c = SlcList; c->name; c++) {
1461 if (c->help) {
1462 if (*c->help)
1463 printf("%-15s %s\n", c->name, c->help);
1464 else
1465 printf("\n");
1466 }
1467 }
1468 }
1469
1470 static struct slclist *
1471 getslc(char *name)
1472 {
1473 return (struct slclist *)
1474 genget(name, (char **) SlcList, sizeof(struct slclist));
1475 }
1476
1477 static int
1478 slccmd(int argc, char *argv[])
1479 {
1480 struct slclist *c;
1481
1482 if (argc != 2) {
1483 fprintf(stderr,
1484 "Need an argument to 'slc' command. 'slc ?' for help.\n");
1485 return 0;
1486 }
1487 c = getslc(argv[1]);
1488 if (c == 0) {
1489 fprintf(stderr, "'%s': unknown argument ('slc ?' for help).\n",
1490 argv[1]);
1491 return 0;
1492 }
1493 if (Ambiguous((void *)c)) {
1494 fprintf(stderr, "'%s': ambiguous argument ('slc ?' for help).\n",
1495 argv[1]);
1496 return 0;
1497 }
1498 (*c->handler)(c->arg);
1499 slcstate();
1500 return 1;
1501 }
1502 \f
1503 /*
1504 * The ENVIRON command.
1505 */
1506
1507 struct envlist {
1508 const char *name;
1509 const char *help;
1510 void (*handler)(unsigned char *, unsigned char *);
1511 int narg;
1512 };
1513
1514 extern struct env_lst *
1515 env_define(const unsigned char *, unsigned char *);
1516 extern void
1517 env_undefine(unsigned char *),
1518 env_export(const unsigned char *),
1519 env_unexport(const unsigned char *),
1520 env_send(unsigned char *),
1521 #if defined(OLD_ENVIRON) && defined(ENV_HACK)
1522 env_varval(unsigned char *),
1523 #endif
1524 env_list(void);
1525 static void
1526 env_help(void);
1527
1528 struct envlist EnvList[] = {
1529 { "define", "Define an environment variable",
1530 (void (*)(unsigned char *, unsigned char *))env_define, 2 },
1531 { "undefine", "Undefine an environment variable",
1532 (void (*)(unsigned char *, unsigned char *))env_undefine, 1 },
1533 { "export", "Mark an environment variable for automatic export",
1534 (void (*)(unsigned char *, unsigned char *))env_export, 1 },
1535 { "unexport", "Don't mark an environment variable for automatic export",
1536 (void (*)(unsigned char *, unsigned char *))env_unexport, 1 },
1537 { "send", "Send an environment variable", (void (*)(unsigned char *, unsigned char *))env_send, 1 },
1538 { "list", "List the current environment variables",
1539 (void (*)(unsigned char *, unsigned char *))env_list, 0 },
1540 #if defined(OLD_ENVIRON) && defined(ENV_HACK)
1541 { "varval", "Reverse VAR and VALUE (auto, right, wrong, status)",
1542 (void (*)(unsigned char *, unsigned char *))env_varval, 1 },
1543 #endif
1544 { "help", NULL, (void (*)(unsigned char *, unsigned char *))env_help, 0 },
1545 { "?", "Print help information", (void (*)(unsigned char *, unsigned char *))env_help, 0 },
1546 { NULL, NULL, NULL, 0 },
1547 };
1548
1549 static void
1550 env_help(void)
1551 {
1552 struct envlist *c;
1553
1554 for (c = EnvList; c->name; c++) {
1555 if (c->help) {
1556 if (*c->help)
1557 printf("%-15s %s\n", c->name, c->help);
1558 else
1559 printf("\n");
1560 }
1561 }
1562 }
1563
1564 static struct envlist *
1565 getenvcmd(char *name)
1566 {
1567 return (struct envlist *)
1568 genget(name, (char **) EnvList, sizeof(struct envlist));
1569 }
1570
1571 static int
1572 env_cmd(int argc, char *argv[])
1573 {
1574 struct envlist *c;
1575
1576 if (argc < 2) {
1577 fprintf(stderr,
1578 "Need an argument to 'environ' command. 'environ ?' for help.\n");
1579 return 0;
1580 }
1581 c = getenvcmd(argv[1]);
1582 if (c == 0) {
1583 fprintf(stderr, "'%s': unknown argument ('environ ?' for help).\n",
1584 argv[1]);
1585 return 0;
1586 }
1587 if (Ambiguous((void *)c)) {
1588 fprintf(stderr, "'%s': ambiguous argument ('environ ?' for help).\n",
1589 argv[1]);
1590 return 0;
1591 }
1592 if (c->narg + 2 != argc) {
1593 fprintf(stderr,
1594 "Need %s%d argument%s to 'environ %s' command. 'environ ?' for help.\n",
1595 c->narg < argc + 2 ? "only " : "",
1596 c->narg, c->narg == 1 ? "" : "s", c->name);
1597 return 0;
1598 }
1599 (*c->handler)(argv[2], argv[3]);
1600 return 1;
1601 }
1602
1603 struct env_lst {
1604 struct env_lst *next; /* pointer to next structure */
1605 struct env_lst *prev; /* pointer to previous structure */
1606 unsigned char *var; /* pointer to variable name */
1607 unsigned char *value; /* pointer to variable value */
1608 int export; /* 1 -> export with default list of variables */
1609 int welldefined; /* A well defined variable */
1610 };
1611
1612 struct env_lst envlisthead;
1613
1614 static struct env_lst *
1615 env_find(const unsigned char *var)
1616 {
1617 struct env_lst *ep;
1618
1619 for (ep = envlisthead.next; ep; ep = ep->next) {
1620 if (strcmp(ep->var, var) == 0)
1621 return(ep);
1622 }
1623 return(NULL);
1624 }
1625
1626 void
1627 env_init(void)
1628 {
1629 extern char **environ;
1630 char **epp, *cp;
1631 struct env_lst *ep;
1632
1633 for (epp = environ; *epp; epp++) {
1634 if ((cp = strchr(*epp, '='))) {
1635 *cp = '\0';
1636 ep = env_define((unsigned char *)*epp,
1637 (unsigned char *)cp+1);
1638 ep->export = 0;
1639 *cp = '=';
1640 }
1641 }
1642 /*
1643 * Special case for DISPLAY variable. If it is ":0.0" or
1644 * "unix:0.0", we have to get rid of "unix" and insert our
1645 * hostname.
1646 */
1647 if ((ep = env_find("DISPLAY"))
1648 && ((*ep->value == ':')
1649 || (strncmp((char *)ep->value, "unix:", 5) == 0))) {
1650 char hbuf[256+1];
1651 char *cp2 = strchr((char *)ep->value, ':');
1652
1653 gethostname(hbuf, 256);
1654 hbuf[256] = '\0';
1655 cp = (char *)malloc(strlen(hbuf) + strlen(cp2) + 1);
1656 sprintf((char *)cp, "%s%s", hbuf, cp2);
1657 free(ep->value);
1658 ep->value = (unsigned char *)cp;
1659 }
1660 /*
1661 * If USER is not defined, but LOGNAME is, then add
1662 * USER with the value from LOGNAME. By default, we
1663 * don't export the USER variable.
1664 */
1665 if ((env_find("USER") == NULL) && (ep = env_find("LOGNAME"))) {
1666 env_define("USER", ep->value);
1667 env_unexport("USER");
1668 }
1669 env_export("DISPLAY");
1670 env_export("PRINTER");
1671 }
1672
1673 struct env_lst *
1674 env_define(const unsigned char *var, unsigned char *value)
1675 {
1676 struct env_lst *ep;
1677
1678 if ((ep = env_find(var))) {
1679 if (ep->var)
1680 free(ep->var);
1681 if (ep->value)
1682 free(ep->value);
1683 } else {
1684 ep = (struct env_lst *)malloc(sizeof(struct env_lst));
1685 ep->next = envlisthead.next;
1686 envlisthead.next = ep;
1687 ep->prev = &envlisthead;
1688 if (ep->next)
1689 ep->next->prev = ep;
1690 }
1691 ep->welldefined = opt_welldefined(var);
1692 ep->export = 1;
1693 ep->var = strdup(var);
1694 ep->value = strdup(value);
1695 return(ep);
1696 }
1697
1698 void
1699 env_undefine(unsigned char *var)
1700 {
1701 struct env_lst *ep;
1702
1703 if ((ep = env_find(var))) {
1704 ep->prev->next = ep->next;
1705 if (ep->next)
1706 ep->next->prev = ep->prev;
1707 if (ep->var)
1708 free(ep->var);
1709 if (ep->value)
1710 free(ep->value);
1711 free(ep);
1712 }
1713 }
1714
1715 void
1716 env_export(const unsigned char *var)
1717 {
1718 struct env_lst *ep;
1719
1720 if ((ep = env_find(var)))
1721 ep->export = 1;
1722 }
1723
1724 void
1725 env_unexport(const unsigned char *var)
1726 {
1727 struct env_lst *ep;
1728
1729 if ((ep = env_find(var)))
1730 ep->export = 0;
1731 }
1732
1733 void
1734 env_send(unsigned char *var)
1735 {
1736 struct env_lst *ep;
1737
1738 if (my_state_is_wont(TELOPT_NEW_ENVIRON)
1739 #ifdef OLD_ENVIRON
1740 && my_state_is_wont(TELOPT_OLD_ENVIRON)
1741 #endif
1742 ) {
1743 fprintf(stderr,
1744 "Cannot send '%s': Telnet ENVIRON option not enabled\n",
1745 var);
1746 return;
1747 }
1748 ep = env_find(var);
1749 if (ep == 0) {
1750 fprintf(stderr, "Cannot send '%s': variable not defined\n",
1751 var);
1752 return;
1753 }
1754 env_opt_start_info();
1755 env_opt_add(ep->var);
1756 env_opt_end(0);
1757 }
1758
1759 void
1760 env_list(void)
1761 {
1762 struct env_lst *ep;
1763
1764 for (ep = envlisthead.next; ep; ep = ep->next) {
1765 printf("%c %-20s %s\n", ep->export ? '*' : ' ',
1766 ep->var, ep->value);
1767 }
1768 }
1769
1770 unsigned char *
1771 env_default(int init, int welldefined)
1772 {
1773 static struct env_lst *nep = NULL;
1774
1775 if (init) {
1776 nep = &envlisthead;
1777 return(NULL);
1778 }
1779 if (nep) {
1780 while ((nep = nep->next)) {
1781 if (nep->export && (nep->welldefined == welldefined))
1782 return(nep->var);
1783 }
1784 }
1785 return(NULL);
1786 }
1787
1788 unsigned char *
1789 env_getvalue(const unsigned char *var)
1790 {
1791 struct env_lst *ep;
1792
1793 if ((ep = env_find(var)))
1794 return(ep->value);
1795 return(NULL);
1796 }
1797
1798 #if defined(OLD_ENVIRON) && defined(ENV_HACK)
1799 void
1800 env_varval(unsigned char *what)
1801 {
1802 extern int old_env_var, old_env_value, env_auto;
1803 int len = strlen((char *)what);
1804
1805 if (len == 0)
1806 goto unknown;
1807
1808 if (strncasecmp((char *)what, "status", len) == 0) {
1809 if (env_auto)
1810 printf("%s%s", "VAR and VALUE are/will be ",
1811 "determined automatically\n");
1812 if (old_env_var == OLD_ENV_VAR)
1813 printf("VAR and VALUE set to correct definitions\n");
1814 else
1815 printf("VAR and VALUE definitions are reversed\n");
1816 } else if (strncasecmp((char *)what, "auto", len) == 0) {
1817 env_auto = 1;
1818 old_env_var = OLD_ENV_VALUE;
1819 old_env_value = OLD_ENV_VAR;
1820 } else if (strncasecmp((char *)what, "right", len) == 0) {
1821 env_auto = 0;
1822 old_env_var = OLD_ENV_VAR;
1823 old_env_value = OLD_ENV_VALUE;
1824 } else if (strncasecmp((char *)what, "wrong", len) == 0) {
1825 env_auto = 0;
1826 old_env_var = OLD_ENV_VALUE;
1827 old_env_value = OLD_ENV_VAR;
1828 } else {
1829 unknown:
1830 printf("Unknown \"varval\" command. (\"auto\", \"right\", \"wrong\", \"status\")\n");
1831 }
1832 }
1833 #endif
1834
1835 #ifdef AUTHENTICATION
1836 /*
1837 * The AUTHENTICATE command.
1838 */
1839
1840 struct authlist {
1841 const char *name;
1842 const char *help;
1843 int (*handler)(char *);
1844 int narg;
1845 };
1846
1847 extern int
1848 auth_enable(char *),
1849 auth_disable(char *),
1850 auth_status(void);
1851 static int
1852 auth_help(void);
1853
1854 struct authlist AuthList[] = {
1855 { "status", "Display current status of authentication information",
1856 (int (*)(char *))auth_status, 0 },
1857 { "disable", "Disable an authentication type ('auth disable ?' for more)",
1858 auth_disable, 1 },
1859 { "enable", "Enable an authentication type ('auth enable ?' for more)",
1860 auth_enable, 1 },
1861 { "help", NULL, (int (*)(char *))auth_help, 0 },
1862 { "?", "Print help information", (int (*)(char *))auth_help, 0 },
1863 { NULL, NULL, NULL, 0 },
1864 };
1865
1866 static int
1867 auth_help(void)
1868 {
1869 struct authlist *c;
1870
1871 for (c = AuthList; c->name; c++) {
1872 if (c->help) {
1873 if (*c->help)
1874 printf("%-15s %s\n", c->name, c->help);
1875 else
1876 printf("\n");
1877 }
1878 }
1879 return 0;
1880 }
1881
1882 int
1883 auth_cmd(int argc, char *argv[])
1884 {
1885 struct authlist *c;
1886
1887 if (argc < 2) {
1888 fprintf(stderr,
1889 "Need an argument to 'auth' command. 'auth ?' for help.\n");
1890 return 0;
1891 }
1892
1893 c = (struct authlist *)
1894 genget(argv[1], (char **) AuthList, sizeof(struct authlist));
1895 if (c == 0) {
1896 fprintf(stderr, "'%s': unknown argument ('auth ?' for help).\n",
1897 argv[1]);
1898 return 0;
1899 }
1900 if (Ambiguous((void *)c)) {
1901 fprintf(stderr, "'%s': ambiguous argument ('auth ?' for help).\n",
1902 argv[1]);
1903 return 0;
1904 }
1905 if (c->narg + 2 != argc) {
1906 fprintf(stderr,
1907 "Need %s%d argument%s to 'auth %s' command. 'auth ?' for help.\n",
1908 c->narg < argc + 2 ? "only " : "",
1909 c->narg, c->narg == 1 ? "" : "s", c->name);
1910 return 0;
1911 }
1912 return((*c->handler)(argv[2]));
1913 }
1914 #endif
1915
1916 #ifdef ENCRYPTION
1917 /*
1918 * The ENCRYPT command.
1919 */
1920
1921 struct encryptlist {
1922 const char *name;
1923 const char *help;
1924 int (*handler)(char *, char *);
1925 int needconnect;
1926 int minarg;
1927 int maxarg;
1928 };
1929
1930 extern int
1931 EncryptEnable(char *, char *),
1932 EncryptDisable(char *, char *),
1933 EncryptType(char *, char *),
1934 EncryptStart(char *),
1935 EncryptStartInput(void),
1936 EncryptStartOutput(void),
1937 EncryptStop(char *),
1938 EncryptStopInput(void),
1939 EncryptStopOutput(void),
1940 EncryptStatus(void);
1941 static int
1942 EncryptHelp(void);
1943
1944 struct encryptlist EncryptList[] = {
1945 { "enable", "Enable encryption. ('encrypt enable ?' for more)",
1946 EncryptEnable, 1, 1, 2 },
1947 { "disable", "Disable encryption. ('encrypt enable ?' for more)",
1948 EncryptDisable, 0, 1, 2 },
1949 { "type", "Set encryption type. ('encrypt type ?' for more)",
1950 EncryptType, 0, 1, 1 },
1951 { "start", "Start encryption. ('encrypt start ?' for more)",
1952 (int (*)(char *, char *))EncryptStart, 1, 0, 1 },
1953 { "stop", "Stop encryption. ('encrypt stop ?' for more)",
1954 (int (*)(char *, char *))EncryptStop, 1, 0, 1 },
1955 { "input", "Start encrypting the input stream",
1956 (int (*)(char *, char *))EncryptStartInput, 1, 0, 0 },
1957 { "-input", "Stop encrypting the input stream",
1958 (int (*)(char *, char *))EncryptStopInput, 1, 0, 0 },
1959 { "output", "Start encrypting the output stream",
1960 (int (*)(char *, char *))EncryptStartOutput, 1, 0, 0 },
1961 { "-output", "Stop encrypting the output stream",
1962 (int (*)(char *, char *))EncryptStopOutput, 1, 0, 0 },
1963
1964 { "status", "Display current status of authentication information",
1965 (int (*)(char *, char *))EncryptStatus, 0, 0, 0 },
1966 { "help", NULL, (int (*)(char *, char *))EncryptHelp, 0, 0, 0 },
1967 { "?", "Print help information", (int (*)(char *, char *))EncryptHelp, 0, 0, 0 },
1968 { NULL, NULL, NULL, 0, 0, 0 },
1969 };
1970
1971 static int
1972 EncryptHelp(void)
1973 {
1974 struct encryptlist *c;
1975
1976 for (c = EncryptList; c->name; c++) {
1977 if (c->help) {
1978 if (*c->help)
1979 printf("%-15s %s\n", c->name, c->help);
1980 else
1981 printf("\n");
1982 }
1983 }
1984 return 0;
1985 }
1986
1987 static int
1988 encrypt_cmd(int argc, char *argv[])
1989 {
1990 struct encryptlist *c;
1991
1992 if (argc < 2) {
1993 fprintf(stderr,
1994 "Need an argument to 'encrypt' command. 'encrypt ?' for help.\n");
1995 return 0;
1996 }
1997
1998 c = (struct encryptlist *)
1999 genget(argv[1], (char **) EncryptList, sizeof(struct encryptlist));
2000 if (c == 0) {
2001 fprintf(stderr, "'%s': unknown argument ('encrypt ?' for help).\n",
2002 argv[1]);
2003 return 0;
2004 }
2005 if (Ambiguous((void *)c)) {
2006 fprintf(stderr, "'%s': ambiguous argument ('encrypt ?' for help).\n",
2007 argv[1]);
2008 return 0;
2009 }
2010 argc -= 2;
2011 if (argc < c->minarg || argc > c->maxarg) {
2012 if (c->minarg == c->maxarg) {
2013 fprintf(stderr, "Need %s%d argument%s ",
2014 c->minarg < argc ? "only " : "", c->minarg,
2015 c->minarg == 1 ? "" : "s");
2016 } else {
2017 fprintf(stderr, "Need %s%d-%d arguments ",
2018 c->maxarg < argc ? "only " : "", c->minarg, c->maxarg);
2019 }
2020 fprintf(stderr, "to 'encrypt %s' command. 'encrypt ?' for help.\n",
2021 c->name);
2022 return 0;
2023 }
2024 if (c->needconnect && !connected) {
2025 if (!(argc && (isprefix(argv[2], "help") || isprefix(argv[2], "?")))) {
2026 printf("?Need to be connected first.\n");
2027 return 0;
2028 }
2029 }
2030 return ((*c->handler)(argc > 0 ? argv[2] : 0,
2031 argc > 1 ? argv[3] : 0));
2032 }
2033 #endif /* ENCRYPTION */
2034
2035 /*
2036 * Print status about the connection.
2037 */
2038 /*ARGSUSED*/
2039 static int
2040 status(int argc, char *argv[])
2041 {
2042 if (connected) {
2043 printf("Connected to %s.\n", hostname);
2044 if ((argc < 2) || strcmp(argv[1], "notmuch")) {
2045 int mode = getconnmode();
2046
2047 if (my_want_state_is_will(TELOPT_LINEMODE)) {
2048 printf("Operating with LINEMODE option\n");
2049 printf("%s line editing\n", (mode&MODE_EDIT) ? "Local" : "No");
2050 printf("%s catching of signals\n",
2051 (mode&MODE_TRAPSIG) ? "Local" : "No");
2052 slcstate();
2053 #ifdef KLUDGELINEMODE
2054 } else if (kludgelinemode && my_want_state_is_dont(TELOPT_SGA)) {
2055 printf("Operating in obsolete linemode\n");
2056 #endif
2057 } else {
2058 printf("Operating in single character mode\n");
2059 if (localchars)
2060 printf("Catching signals locally\n");
2061 }
2062 printf("%s character echo\n", (mode&MODE_ECHO) ? "Local" : "Remote");
2063 if (my_want_state_is_will(TELOPT_LFLOW))
2064 printf("%s flow control\n", (mode&MODE_FLOW) ? "Local" : "No");
2065 #ifdef ENCRYPTION
2066 encrypt_display();
2067 #endif /* ENCRYPTION */
2068 }
2069 } else {
2070 printf("No connection.\n");
2071 }
2072 printf("Escape character is '%s'.\n", control(escape));
2073 (void) fflush(stdout);
2074 return 1;
2075 }
2076
2077 #ifdef SIGINFO
2078 /*
2079 * Function that gets called when SIGINFO is received.
2080 */
2081 void
2082 ayt_status(void)
2083 {
2084 (void) call(status, "status", "notmuch", 0);
2085 }
2086 #endif
2087
2088 static const char *
2089 sockaddr_ntop(struct sockaddr *sa)
2090 {
2091 void *addr;
2092 static char addrbuf[INET6_ADDRSTRLEN];
2093
2094 switch (sa->sa_family) {
2095 case AF_INET:
2096 addr = &((struct sockaddr_in *)sa)->sin_addr;
2097 break;
2098 case AF_UNIX:
2099 addr = &((struct sockaddr_un *)sa)->sun_path;
2100 break;
2101 #ifdef INET6
2102 case AF_INET6:
2103 addr = &((struct sockaddr_in6 *)sa)->sin6_addr;
2104 break;
2105 #endif
2106 default:
2107 return NULL;
2108 }
2109 inet_ntop(sa->sa_family, addr, addrbuf, sizeof(addrbuf));
2110 return addrbuf;
2111 }
2112
2113 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
2114 static int
2115 setpolicy(int lnet, struct addrinfo *res, char *policy)
2116 {
2117 char *buf;
2118 int level;
2119 int optname;
2120
2121 if (policy == NULL)
2122 return 0;
2123
2124 buf = ipsec_set_policy(policy, strlen(policy));
2125 if (buf == NULL) {
2126 printf("%s\n", ipsec_strerror());
2127 return -1;
2128 }
2129 level = res->ai_family == AF_INET ? IPPROTO_IP : IPPROTO_IPV6;
2130 optname = res->ai_family == AF_INET ? IP_IPSEC_POLICY : IPV6_IPSEC_POLICY;
2131 if (setsockopt(lnet, level, optname, buf, ipsec_get_policylen(buf)) < 0){
2132 perror("setsockopt");
2133 return -1;
2134 }
2135
2136 free(buf);
2137 return 0;
2138 }
2139 #endif
2140
2141 #ifdef INET6
2142 /*
2143 * When an Address Family related error happend, check if retry with
2144 * another AF is possible or not.
2145 * Return 1, if retry with another af is OK. Else, return 0.
2146 */
2147 static int
2148 switch_af(struct addrinfo **aip)
2149 {
2150 int nextaf;
2151 struct addrinfo *ai;
2152
2153 ai = *aip;
2154 nextaf = (ai->ai_family == AF_INET) ? AF_INET6 : AF_INET;
2155 do
2156 ai=ai->ai_next;
2157 while (ai != NULL && ai->ai_family != nextaf);
2158 *aip = ai;
2159 if (*aip != NULL) {
2160 return 1;
2161 }
2162 return 0;
2163 }
2164 #endif
2165
2166 int
2167 tn(int argc, char *argv[])
2168 {
2169 char *srp = 0;
2170 int proto, opt;
2171 int srlen;
2172 int srcroute = 0, result;
2173 char *cmd, *hostp = 0, *portp = 0, *user = 0;
2174 char *src_addr = NULL;
2175 struct addrinfo hints, *res, *res0 = NULL, *src_res, *src_res0 = NULL;
2176 int error = 0, af_error = 0;
2177
2178 if (connected) {
2179 printf("?Already connected to %s\n", hostname);
2180 setuid(getuid());
2181 return 0;
2182 }
2183 if (argc < 2) {
2184 (void) strcpy(line, "open ");
2185 printf("(to) ");
2186 (void) fgets(&line[strlen(line)], sizeof(line) - strlen(line), stdin);
2187 makeargv();
2188 argc = margc;
2189 argv = margv;
2190 }
2191 cmd = *argv;
2192 --argc; ++argv;
2193 while (argc) {
2194 if (strcmp(*argv, "help") == 0 || isprefix(*argv, "?"))
2195 goto usage;
2196 if (strcmp(*argv, "-l") == 0) {
2197 --argc; ++argv;
2198 if (argc == 0)
2199 goto usage;
2200 user = *argv++;
2201 --argc;
2202 continue;
2203 }
2204 if (strcmp(*argv, "-a") == 0) {
2205 --argc; ++argv;
2206 autologin = 1;
2207 continue;
2208 }
2209 if (strcmp(*argv, "-s") == 0) {
2210 --argc; ++argv;
2211 if (argc == 0)
2212 goto usage;
2213 src_addr = *argv++;
2214 --argc;
2215 continue;
2216 }
2217 if (hostp == 0) {
2218 hostp = *argv++;
2219 --argc;
2220 continue;
2221 }
2222 if (portp == 0) {
2223 portp = *argv++;
2224 --argc;
2225 continue;
2226 }
2227 usage:
2228 printf("usage: %s [-l user] [-a] [-s src_addr] host-name [port]\n", cmd);
2229 setuid(getuid());
2230 return 0;
2231 }
2232 if (hostp == 0)
2233 goto usage;
2234
2235 if (src_addr != NULL) {
2236 memset(&hints, 0, sizeof(hints));
2237 hints.ai_family = family;
2238 hints.ai_socktype = SOCK_STREAM;
2239 error = getaddrinfo(src_addr, 0, &hints, &src_res);
2240 if (error == EAI_NODATA) {
2241 hints.ai_flags = 0;
2242 error = getaddrinfo(src_addr, 0, &hints, &src_res);
2243 }
2244 if (error != 0) {
2245 fprintf(stderr, "%s: %s\n", src_addr, gai_strerror(error));
2246 if (error == EAI_SYSTEM)
2247 fprintf(stderr, "%s: %s\n", src_addr, strerror(errno));
2248 setuid(getuid());
2249 return 0;
2250 }
2251 src_res0 = src_res;
2252 }
2253 if (hostp[0] == '/') {
2254 struct sockaddr_un su;
2255
2256 if (strlen(hostp) >= sizeof(su.sun_path)) {
2257 fprintf(stderr, "hostname too long for unix domain socket: %s",
2258 hostp);
2259 goto fail;
2260 }
2261 memset(&su, 0, sizeof su);
2262 su.sun_family = AF_UNIX;
2263 strncpy(su.sun_path, hostp, sizeof su.sun_path);
2264 printf("Trying %s...\n", hostp);
2265 net = socket(PF_UNIX, SOCK_STREAM, 0);
2266 if ( net < 0) {
2267 perror("socket");
2268 goto fail;
2269 }
2270 if (connect(net, (struct sockaddr *)&su, sizeof su) == -1) {
2271 perror(su.sun_path);
2272 (void) NetClose(net);
2273 goto fail;
2274 }
2275 goto af_unix;
2276 } else if (hostp[0] == '@' || hostp[0] == '!') {
2277 if (
2278 #ifdef INET6
2279 family == AF_INET6 ||
2280 #endif
2281 (hostname = strrchr(hostp, ':')) == NULL)
2282 hostname = strrchr(hostp, '@');
2283 if (hostname == NULL) {
2284 hostname = hostp;
2285 } else {
2286 hostname++;
2287 srcroute = 1;
2288 }
2289 } else
2290 hostname = hostp;
2291 if (!portp) {
2292 telnetport = 1;
2293 portp = strdup("telnet");
2294 } else if (*portp == '-') {
2295 portp++;
2296 telnetport = 1;
2297 } else
2298 telnetport = 0;
2299
2300 memset(&hints, 0, sizeof(hints));
2301 hints.ai_flags = AI_NUMERICHOST;
2302 hints.ai_family = family;
2303 hints.ai_socktype = SOCK_STREAM;
2304 error = getaddrinfo(hostname, portp, &hints, &res);
2305 if (error) {
2306 hints.ai_flags = AI_CANONNAME;
2307 error = getaddrinfo(hostname, portp, &hints, &res);
2308 }
2309 if (error != 0) {
2310 fprintf(stderr, "%s: %s\n", hostname, gai_strerror(error));
2311 if (error == EAI_SYSTEM)
2312 fprintf(stderr, "%s: %s\n", hostname, strerror(errno));
2313 setuid(getuid());
2314 goto fail;
2315 }
2316 if (hints.ai_flags == AI_NUMERICHOST) {
2317 /* hostname has numeric */
2318 int gni_err = 1;
2319
2320 if (doaddrlookup)
2321 gni_err = getnameinfo(res->ai_addr, res->ai_addr->sa_len,
2322 _hostname, sizeof(_hostname) - 1, NULL, 0,
2323 NI_NAMEREQD);
2324 if (gni_err != 0)
2325 (void) strncpy(_hostname, hostp, sizeof(_hostname) - 1);
2326 _hostname[sizeof(_hostname)-1] = '\0';
2327 hostname = _hostname;
2328 } else {
2329 /* hostname has FQDN */
2330 if (srcroute != 0)
2331 (void) strncpy(_hostname, hostname, sizeof(_hostname) - 1);
2332 else if (res->ai_canonname != NULL)
2333 strcpy(_hostname, res->ai_canonname);
2334 else
2335 (void) strncpy(_hostname, hostp, sizeof(_hostname) - 1);
2336 _hostname[sizeof(_hostname)-1] = '\0';
2337 hostname = _hostname;
2338 }
2339 res0 = res;
2340 #ifdef INET6
2341 af_again:
2342 #endif
2343 if (srcroute != 0) {
2344 static char hostbuf[BUFSIZ];
2345
2346 if (af_error == 0) { /* save intermediate hostnames for retry */
2347 strncpy(hostbuf, hostp, BUFSIZ - 1);
2348 hostbuf[BUFSIZ - 1] = '\0';
2349 } else
2350 hostp = hostbuf;
2351 srp = 0;
2352 result = sourceroute(res, hostp, &srp, &srlen, &proto, &opt);
2353 if (result == 0) {
2354 #ifdef INET6
2355 if (family == AF_UNSPEC && af_error == 0 &&
2356 switch_af(&res) == 1) {
2357 af_error = 1;
2358 goto af_again;
2359 }
2360 #endif
2361 setuid(getuid());
2362 goto fail;
2363 } else if (result == -1) {
2364 printf("Bad source route option: %s\n", hostp);
2365 setuid(getuid());
2366 goto fail;
2367 }
2368 }
2369 do {
2370 printf("Trying %s...\n", sockaddr_ntop(res->ai_addr));
2371 net = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
2372 setuid(getuid());
2373 if (net < 0) {
2374 #ifdef INET6
2375 if (family == AF_UNSPEC && af_error == 0 &&
2376 switch_af(&res) == 1) {
2377 af_error = 1;
2378 goto af_again;
2379 }
2380 #endif
2381 perror("telnet: socket");
2382 goto fail;
2383 }
2384 if (srp && setsockopt(net, proto, opt, (char *)srp, srlen) < 0)
2385 perror("setsockopt (source route)");
2386 #if defined(IPPROTO_IP) && defined(IP_TOS)
2387 if (res->ai_family == PF_INET) {
2388 # if defined(HAS_GETTOS)
2389 struct tosent *tp;
2390 if (tos < 0 && (tp = gettosbyname("telnet", "tcp")))
2391 tos = tp->t_tos;
2392 # endif
2393 if (tos < 0)
2394 tos = IPTOS_LOWDELAY;
2395 if (tos
2396 && (setsockopt(net, IPPROTO_IP, IP_TOS,
2397 (char *)&tos, sizeof(int)) < 0)
2398 && (errno != ENOPROTOOPT))
2399 perror("telnet: setsockopt (IP_TOS) (ignored)");
2400 }
2401 #endif /* defined(IPPROTO_IP) && defined(IP_TOS) */
2402
2403 if (debug && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 1) < 0) {
2404 perror("setsockopt (SO_DEBUG)");
2405 }
2406
2407 if (src_addr != NULL) {
2408 for (src_res = src_res0; src_res != 0; src_res = src_res->ai_next)
2409 if (src_res->ai_family == res->ai_family)
2410 break;
2411 if (src_res == NULL)
2412 src_res = src_res0;
2413 if (bind(net, src_res->ai_addr, src_res->ai_addrlen) == -1) {
2414 #ifdef INET6
2415 if (family == AF_UNSPEC && af_error == 0 &&
2416 switch_af(&res) == 1) {
2417 af_error = 1;
2418 (void) NetClose(net);
2419 goto af_again;
2420 }
2421 #endif
2422 perror("bind");
2423 (void) NetClose(net);
2424 goto fail;
2425 }
2426 }
2427 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
2428 if (setpolicy(net, res, ipsec_policy_in) < 0) {
2429 (void) NetClose(net);
2430 goto fail;
2431 }
2432 if (setpolicy(net, res, ipsec_policy_out) < 0) {
2433 (void) NetClose(net);
2434 goto fail;
2435 }
2436 #endif
2437
2438 if (connect(net, res->ai_addr, res->ai_addrlen) < 0) {
2439 struct addrinfo *next;
2440
2441 next = res->ai_next;
2442 /* If already an af failed, only try same af. */
2443 if (af_error != 0)
2444 while (next != NULL && next->ai_family != res->ai_family)
2445 next = next->ai_next;
2446 warn("connect to address %s", sockaddr_ntop(res->ai_addr));
2447 if (next != NULL) {
2448 res = next;
2449 (void) NetClose(net);
2450 continue;
2451 }
2452 warnx("Unable to connect to remote host");
2453 (void) NetClose(net);
2454 goto fail;
2455 }
2456 connected++;
2457 #ifdef AUTHENTICATION
2458 #ifdef ENCRYPTION
2459 auth_encrypt_connect(connected);
2460 #endif
2461 #endif
2462 } while (connected == 0);
2463 freeaddrinfo(res0);
2464 if (src_res0 != NULL)
2465 freeaddrinfo(src_res0);
2466 cmdrc(hostp, hostname);
2467 af_unix:
2468 if (autologin && user == NULL) {
2469 struct passwd *pw;
2470
2471 user = getenv("USER");
2472 if (user == NULL ||
2473 ((pw = getpwnam(user)) && pw->pw_uid != getuid())) {
2474 if ((pw = getpwuid(getuid())))
2475 user = pw->pw_name;
2476 else
2477 user = NULL;
2478 }
2479 }
2480 if (user) {
2481 env_define("USER", user);
2482 env_export("USER");
2483 }
2484 (void) call(status, "status", "notmuch", 0);
2485 if (setjmp(peerdied) == 0)
2486 telnet(user);
2487 (void) NetClose(net);
2488 ExitString("Connection closed by foreign host.\n",1);
2489 /*NOTREACHED*/
2490 fail:
2491 if (res0 != NULL)
2492 freeaddrinfo(res0);
2493 if (src_res0 != NULL)
2494 freeaddrinfo(src_res0);
2495 return 0;
2496 }
2497
2498 #define HELPINDENT (sizeof ("connect"))
2499
2500 static char
2501 openhelp[] = "connect to a site",
2502 closehelp[] = "close current connection",
2503 logouthelp[] = "forcibly logout remote user and close the connection",
2504 quithelp[] = "exit telnet",
2505 statushelp[] = "print status information",
2506 helphelp[] = "print help information",
2507 sendhelp[] = "transmit special characters ('send ?' for more)",
2508 sethelp[] = "set operating parameters ('set ?' for more)",
2509 unsethelp[] = "unset operating parameters ('unset ?' for more)",
2510 togglestring[] ="toggle operating parameters ('toggle ?' for more)",
2511 slchelp[] = "change state of special charaters ('slc ?' for more)",
2512 displayhelp[] = "display operating parameters",
2513 #ifdef AUTHENTICATION
2514 authhelp[] = "turn on (off) authentication ('auth ?' for more)",
2515 #endif
2516 #ifdef ENCRYPTION
2517 encrypthelp[] = "turn on (off) encryption ('encrypt ?' for more)",
2518 #endif /* ENCRYPTION */
2519 zhelp[] = "suspend telnet",
2520 #ifdef OPIE
2521 opiehelp[] = "compute response to OPIE challenge",
2522 #endif
2523 shellhelp[] = "invoke a subshell",
2524 envhelp[] = "change environment variables ('environ ?' for more)",
2525 modestring[] = "try to enter line or character mode ('mode ?' for more)";
2526
2527 static Command cmdtab[] = {
2528 { "close", closehelp, bye, 1 },
2529 { "logout", logouthelp, (int (*)(int, char **))logout, 1 },
2530 { "display", displayhelp, display, 0 },
2531 { "mode", modestring, modecmd, 0 },
2532 { "telnet", openhelp, tn, 0 },
2533 { "open", openhelp, tn, 0 },
2534 { "quit", quithelp, (int (*)(int, char **))quit, 0 },
2535 { "send", sendhelp, sendcmd, 0 },
2536 { "set", sethelp, setcmd, 0 },
2537 { "unset", unsethelp, unsetcmd, 0 },
2538 { "status", statushelp, status, 0 },
2539 { "toggle", togglestring, toggle, 0 },
2540 { "slc", slchelp, slccmd, 0 },
2541 #ifdef AUTHENTICATION
2542 { "auth", authhelp, auth_cmd, 0 },
2543 #endif
2544 #ifdef ENCRYPTION
2545 { "encrypt", encrypthelp, encrypt_cmd, 0 },
2546 #endif /* ENCRYPTION */
2547 { "z", zhelp, (int (*)(int, char **))suspend, 0 },
2548 { "!", shellhelp, shell, 1 },
2549 { "environ", envhelp, env_cmd, 0 },
2550 { "?", helphelp, help, 0 },
2551 #ifdef OPIE
2552 { "opie", opiehelp, opie_calc, 0 },
2553 #endif
2554 { NULL, NULL, NULL, 0 }
2555 };
2556
2557 static char crmodhelp[] = "deprecated command -- use 'toggle crmod' instead";
2558 static char escapehelp[] = "deprecated command -- use 'set escape' instead";
2559
2560 static Command cmdtab2[] = {
2561 { "help", 0, help, 0 },
2562 { "escape", escapehelp, setescape, 0 },
2563 { "crmod", crmodhelp, (int (*)(int, char **))togcrmod, 0 },
2564 { NULL, NULL, NULL, 0 }
2565 };
2566
2567
2568 /*
2569 * Call routine with argc, argv set from args (terminated by 0).
2570 */
2571
2572 static int
2573 call(intrtn_t routine, ...)
2574 {
2575 va_list ap;
2576 char *args[100];
2577 int argno = 0;
2578
2579 va_start(ap, routine);
2580 while ((args[argno++] = va_arg(ap, char *)) != 0);
2581 va_end(ap);
2582 return (*routine)(argno-1, args);
2583 }
2584
2585
2586 static Command *
2587 getcmd(char *name)
2588 {
2589 Command *cm;
2590
2591 if ((cm = (Command *) genget(name, (char **) cmdtab, sizeof(Command))))
2592 return cm;
2593 return (Command *) genget(name, (char **) cmdtab2, sizeof(Command));
2594 }
2595
2596 void
2597 command(int top, const char *tbuf, int cnt)
2598 {
2599 Command *c;
2600
2601 setcommandmode();
2602 if (!top) {
2603 putchar('\n');
2604 } else {
2605 (void) signal(SIGINT, SIG_DFL);
2606 (void) signal(SIGQUIT, SIG_DFL);
2607 }
2608 for (;;) {
2609 if (rlogin == _POSIX_VDISABLE)
2610 printf("%s> ", prompt);
2611 if (tbuf) {
2612 char *cp;
2613 cp = line;
2614 while (cnt > 0 && (*cp++ = *tbuf++) != '\n')
2615 cnt--;
2616 tbuf = 0;
2617 if (cp == line || *--cp != '\n' || cp == line)
2618 goto getline;
2619 *cp = '\0';
2620 if (rlogin == _POSIX_VDISABLE)
2621 printf("%s\n", line);
2622 } else {
2623 getline:
2624 if (rlogin != _POSIX_VDISABLE)
2625 printf("%s> ", prompt);
2626 if (fgets(line, sizeof(line), stdin) == NULL) {
2627 if (feof(stdin) || ferror(stdin)) {
2628 (void) quit();
2629 /*NOTREACHED*/
2630 }
2631 break;
2632 }
2633 }
2634 if (line[0] == 0)
2635 break;
2636 makeargv();
2637 if (margv[0] == 0) {
2638 break;
2639 }
2640 c = getcmd(margv[0]);
2641 if (Ambiguous((void *)c)) {
2642 printf("?Ambiguous command\n");
2643 continue;
2644 }
2645 if (c == 0) {
2646 printf("?Invalid command\n");
2647 continue;
2648 }
2649 if (c->needconnect && !connected) {
2650 printf("?Need to be connected first.\n");
2651 continue;
2652 }
2653 if ((*c->handler)(margc, margv)) {
2654 break;
2655 }
2656 }
2657 if (!top) {
2658 if (!connected) {
2659 longjmp(toplevel, 1);
2660 /*NOTREACHED*/
2661 }
2662 setconnmode(0);
2663 }
2664 }
2665 \f
2666 /*
2667 * Help command.
2668 */
2669 static int
2670 help(int argc, char *argv[])
2671 {
2672 Command *c;
2673
2674 if (argc == 1) {
2675 printf("Commands may be abbreviated. Commands are:\n\n");
2676 for (c = cmdtab; c->name; c++)
2677 if (c->help) {
2678 printf("%-*s\t%s\n", (int)HELPINDENT, c->name,
2679 c->help);
2680 }
2681 return 0;
2682 }
2683 else while (--argc > 0) {
2684 char *arg;
2685 arg = *++argv;
2686 c = getcmd(arg);
2687 if (Ambiguous((void *)c))
2688 printf("?Ambiguous help command %s\n", arg);
2689 else if (c == (Command *)0)
2690 printf("?Invalid help command %s\n", arg);
2691 else
2692 printf("%s\n", c->help);
2693 }
2694 return 0;
2695 }
2696
2697 static char *rcname = 0;
2698 static char rcbuf[128];
2699
2700 void
2701 cmdrc(char *m1, char *m2)
2702 {
2703 Command *c;
2704 FILE *rcfile;
2705 int gotmachine = 0;
2706 int l1 = strlen(m1);
2707 int l2 = strlen(m2);
2708 char m1save[MAXHOSTNAMELEN];
2709
2710 if (skiprc)
2711 return;
2712
2713 strlcpy(m1save, m1, sizeof(m1save));
2714 m1 = m1save;
2715
2716 if (rcname == 0) {
2717 rcname = getenv("HOME");
2718 if (rcname && (strlen(rcname) + 10) < sizeof(rcbuf))
2719 strcpy(rcbuf, rcname);
2720 else
2721 rcbuf[0] = '\0';
2722 strcat(rcbuf, "/.telnetrc");
2723 rcname = rcbuf;
2724 }
2725
2726 if ((rcfile = fopen(rcname, "r")) == 0) {
2727 return;
2728 }
2729
2730 for (;;) {
2731 if (fgets(line, sizeof(line), rcfile) == NULL)
2732 break;
2733 if (line[0] == 0)
2734 break;
2735 if (line[0] == '#')
2736 continue;
2737 if (gotmachine) {
2738 if (!isspace(line[0]))
2739 gotmachine = 0;
2740 }
2741 if (gotmachine == 0) {
2742 if (isspace(line[0]))
2743 continue;
2744 if (strncasecmp(line, m1, l1) == 0)
2745 strncpy(line, &line[l1], sizeof(line) - l1);
2746 else if (strncasecmp(line, m2, l2) == 0)
2747 strncpy(line, &line[l2], sizeof(line) - l2);
2748 else if (strncasecmp(line, "DEFAULT", 7) == 0)
2749 strncpy(line, &line[7], sizeof(line) - 7);
2750 else
2751 continue;
2752 if (line[0] != ' ' && line[0] != '\t' && line[0] != '\n')
2753 continue;
2754 gotmachine = 1;
2755 }
2756 makeargv();
2757 if (margv[0] == 0)
2758 continue;
2759 c = getcmd(margv[0]);
2760 if (Ambiguous((void *)c)) {
2761 printf("?Ambiguous command: %s\n", margv[0]);
2762 continue;
2763 }
2764 if (c == 0) {
2765 printf("?Invalid command: %s\n", margv[0]);
2766 continue;
2767 }
2768 /*
2769 * This should never happen...
2770 */
2771 if (c->needconnect && !connected) {
2772 printf("?Need to be connected first for %s.\n", margv[0]);
2773 continue;
2774 }
2775 (*c->handler)(margc, margv);
2776 }
2777 fclose(rcfile);
2778 }
2779
2780 /*
2781 * Source route is handed in as
2782 * [!]@hop1@hop2...[@|:]dst
2783 * If the leading ! is present, it is a
2784 * strict source route, otherwise it is
2785 * assmed to be a loose source route.
2786 *
2787 * We fill in the source route option as
2788 * hop1,hop2,hop3...dest
2789 * and return a pointer to hop1, which will
2790 * be the address to connect() to.
2791 *
2792 * Arguments:
2793 *
2794 * res: ponter to addrinfo structure which contains sockaddr to
2795 * the host to connect to.
2796 *
2797 * arg: pointer to route list to decipher
2798 *
2799 * cpp: If *cpp is not equal to NULL, this is a
2800 * pointer to a pointer to a character array
2801 * that should be filled in with the option.
2802 *
2803 * lenp: pointer to an integer that contains the
2804 * length of *cpp if *cpp != NULL.
2805 *
2806 * protop: pointer to an integer that should be filled in with
2807 * appropriate protocol for setsockopt, as socket
2808 * protocol family.
2809 *
2810 * optp: pointer to an integer that should be filled in with
2811 * appropriate option for setsockopt, as socket protocol
2812 * family.
2813 *
2814 * Return values:
2815 *
2816 * If the return value is 1, then all operations are
2817 * successful. If the
2818 * return value is -1, there was a syntax error in the
2819 * option, either unknown characters, or too many hosts.
2820 * If the return value is 0, one of the hostnames in the
2821 * path is unknown, and *cpp is set to point to the bad
2822 * hostname.
2823 *
2824 * *cpp: If *cpp was equal to NULL, it will be filled
2825 * in with a pointer to our static area that has
2826 * the option filled in. This will be 32bit aligned.
2827 *
2828 * *lenp: This will be filled in with how long the option
2829 * pointed to by *cpp is.
2830 *
2831 * *protop: This will be filled in with appropriate protocol for
2832 * setsockopt, as socket protocol family.
2833 *
2834 * *optp: This will be filled in with appropriate option for
2835 * setsockopt, as socket protocol family.
2836 */
2837 static int
2838 sourceroute(struct addrinfo *ai, char *arg, char **cpp, int *lenp, int *protop, int *optp)
2839 {
2840 static char buf[1024 + ALIGNBYTES]; /*XXX*/
2841 char *cp, *cp2, *lsrp, *ep;
2842 struct sockaddr_in *_sin;
2843 #ifdef INET6
2844 struct sockaddr_in6 *sin6;
2845 struct cmsghdr *cmsg;
2846 #endif
2847 struct addrinfo hints, *res;
2848 int error;
2849 char c;
2850
2851 /*
2852 * Verify the arguments, and make sure we have
2853 * at least 7 bytes for the option.
2854 */
2855 if (cpp == NULL || lenp == NULL)
2856 return -1;
2857 if (*cpp != NULL) {
2858 switch (res->ai_family) {
2859 case AF_INET:
2860 if (*lenp < 7)
2861 return -1;
2862 break;
2863 #ifdef INET6
2864 case AF_INET6:
2865 if (*lenp < (int)CMSG_SPACE(sizeof(struct ip6_rthdr) +
2866 sizeof(struct in6_addr)))
2867 return -1;
2868 break;
2869 #endif
2870 }
2871 }
2872 /*
2873 * Decide whether we have a buffer passed to us,
2874 * or if we need to use our own static buffer.
2875 */
2876 if (*cpp) {
2877 lsrp = *cpp;
2878 ep = lsrp + *lenp;
2879 } else {
2880 *cpp = lsrp = (char *)ALIGN(buf);
2881 ep = lsrp + 1024;
2882 }
2883
2884 cp = arg;
2885
2886 #ifdef INET6
2887 if (ai->ai_family == AF_INET6) {
2888 cmsg = NULL;
2889 if (*cp != '@')
2890 return -1;
2891 *protop = IPPROTO_IPV6;
2892 *optp = IPV6_PKTOPTIONS;
2893 } else
2894 #endif
2895 {
2896 /*
2897 * Next, decide whether we have a loose source
2898 * route or a strict source route, and fill in
2899 * the begining of the option.
2900 */
2901 if (*cp == '!') {
2902 cp++;
2903 *lsrp++ = IPOPT_SSRR;
2904 } else
2905 *lsrp++ = IPOPT_LSRR;
2906
2907 if (*cp != '@')
2908 return -1;
2909
2910 lsrp++; /* skip over length, we'll fill it in later */
2911 *lsrp++ = 4;
2912 *protop = IPPROTO_IP;
2913 *optp = IP_OPTIONS;
2914 }
2915
2916 cp++;
2917 memset(&hints, 0, sizeof(hints));
2918 hints.ai_family = ai->ai_family;
2919 hints.ai_socktype = SOCK_STREAM;
2920 for (c = 0;;) {
2921 if (
2922 #ifdef INET6
2923 ai->ai_family != AF_INET6 &&
2924 #endif
2925 c == ':')
2926 cp2 = 0;
2927 else for (cp2 = cp; (c = *cp2); cp2++) {
2928 if (c == ',') {
2929 *cp2++ = '\0';
2930 if (*cp2 == '@')
2931 cp2++;
2932 } else if (c == '@') {
2933 *cp2++ = '\0';
2934 } else if (
2935 #ifdef INET6
2936 ai->ai_family != AF_INET6 &&
2937 #endif
2938 c == ':') {
2939 *cp2++ = '\0';
2940 } else
2941 continue;
2942 break;
2943 }
2944 if (!c)
2945 cp2 = 0;
2946
2947 hints.ai_flags = AI_NUMERICHOST;
2948 error = getaddrinfo(cp, NULL, &hints, &res);
2949 if (error == EAI_NODATA) {
2950 hints.ai_flags = 0;
2951 error = getaddrinfo(cp, NULL, &hints, &res);
2952 }
2953 if (error != 0) {
2954 fprintf(stderr, "%s: %s\n", cp, gai_strerror(error));
2955 if (error == EAI_SYSTEM)
2956 fprintf(stderr, "%s: %s\n", cp,
2957 strerror(errno));
2958 *cpp = cp;
2959 return(0);
2960 }
2961 #ifdef INET6
2962 if (res->ai_family == AF_INET6) {
2963 sin6 = (struct sockaddr_in6 *)res->ai_addr;
2964 } else
2965 #endif
2966 {
2967 _sin = (struct sockaddr_in *)res->ai_addr;
2968 memcpy(lsrp, (char *)&_sin->sin_addr, 4);
2969 lsrp += 4;
2970 }
2971 if (cp2)
2972 cp = cp2;
2973 else
2974 break;
2975 /*
2976 * Check to make sure there is space for next address
2977 */
2978 #ifdef INET6
2979 if (res->ai_family == AF_INET6) {
2980 if (((char *)CMSG_DATA(cmsg) +
2981 sizeof(struct ip6_rthdr)) > ep)
2982 return -1;
2983 } else
2984 #endif
2985 if (lsrp + 4 > ep)
2986 return -1;
2987 freeaddrinfo(res);
2988 }
2989 #ifdef INET6
2990 if (res->ai_family == AF_INET6) {
2991 *lenp = 0;
2992 } else
2993 #endif
2994 {
2995 if ((*(*cpp+IPOPT_OLEN) = lsrp - *cpp) <= 7) {
2996 *cpp = 0;
2997 *lenp = 0;
2998 return -1;
2999 }
3000 *lsrp++ = IPOPT_NOP; /* 32 bit word align it */
3001 *lenp = lsrp - *cpp;
3002 }
3003 freeaddrinfo(res);
3004 return 1;
3005 }
DragonFly BSD