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Merge branch 'vendor/OPENSSL'
[dragonfly.git] / usr.bin / telnet / commands.c
blob9c48e09721cc6a08b54ef5faf69bdc62c8036383
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. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * @(#)commands.c 8.4 (Berkeley) 5/30/95
30 * $FreeBSD: src/crypto/telnet/telnet/commands.c,v 1.12.2.7 2003/04/23 07:16:32 ru Exp $
31 */
32
33 #include <sys/param.h>
34 #include <sys/un.h>
35 #include <sys/file.h>
36 #include <sys/socket.h>
37 #include <netinet/in.h>
38
39 #include <ctype.h>
40 #include <err.h>
41 #include <errno.h>
42 #include <netdb.h>
43 #include <pwd.h>
44 #include <signal.h>
45 #include <stdarg.h>
46 #include <stdlib.h>
47 #include <string.h>
48 #include <unistd.h>
49
50 #include <arpa/telnet.h>
51 #include <arpa/inet.h>
52
53 #include "general.h"
54
55 #include "ring.h"
56
57 #include "externs.h"
58 #include "defines.h"
59 #include "types.h"
60 #include "misc.h"
61
62 #ifdef AUTHENTICATION
63 #include <libtelnet/auth.h>
64 #endif
65 #ifdef ENCRYPTION
66 #include <libtelnet/encrypt.h>
67 #endif
68
69 #include <netinet/in_systm.h>
70 #include <netinet/ip.h>
71 #include <netinet/ip6.h>
72
73 #ifndef MAXHOSTNAMELEN
74 #define MAXHOSTNAMELEN 256
75 #endif
76
77 typedef int (*intrtn_t)(int, char **);
78
79 #ifdef AUTHENTICATION
80 extern int auth_togdebug(int);
81 #endif
82 #ifdef ENCRYPTION
83 extern int EncryptAutoEnc(int);
84 extern int EncryptAutoDec(int);
85 extern int EncryptDebug(int);
86 extern int EncryptVerbose(int);
87 #endif /* ENCRYPTION */
88 #if defined(IPPROTO_IP) && defined(IP_TOS)
89 int tos = -1;
90 #endif /* defined(IPPROTO_IP) && defined(IP_TOS) */
91
92 char *hostname;
93 static char _hostname[MAXHOSTNAMELEN];
94
95 static int help(int, char **);
96 static int call(intrtn_t, ...);
97 static void cmdrc(char *, char *);
98 #ifdef INET6
99 static int switch_af(struct addrinfo **);
100 #endif
101 static int togglehelp(void);
102 static int send_tncmd(void (*)(int, int), const char *, char *);
103 static int setmod(int);
104 static int clearmode(int);
105 static int modehelp(void);
106 static int sourceroute(struct addrinfo *, char *, char **, int *, int *, int *);
107
108 typedef struct {
109 const char *name; /* command name */
110 const char *help; /* help string (NULL for no help) */
111 int (*handler)(int, char **); /* routine which executes command */
112 int needconnect; /* Do we need to be connected to execute? */
113 } Command;
114
115 static char line[256];
116 static char saveline[256];
117 static int margc;
118 static char *margv[20];
119
120 #ifdef OPIE
121 #include <sys/wait.h>
122 #define PATH_OPIEKEY "/usr/bin/opiekey"
123 static int
124 opie_calc(int argc, char *argv[])
125 {
126 int status;
127
128 if(argc != 3) {
129 printf("%s sequence challenge\n", argv[0]);
130 return (0);
131 }
132
133 switch(fork()) {
134 case 0:
135 execv(PATH_OPIEKEY, argv);
136 exit (1);
137 case -1:
138 perror("fork");
139 break;
140 default:
141 (void) wait(&status);
142 if (WIFEXITED(status))
143 return (WEXITSTATUS(status));
144 }
145 return (0);
146 }
147 #endif
148
149 static void
150 makeargv(void)
151 {
152 char *cp, *cp2, c;
153 char **argp = margv;
154
155 margc = 0;
156 cp = line;
157 if (*cp == '!') { /* Special case shell escape */
158 strcpy(saveline, line); /* save for shell command */
159 *argp++ = strdup("!"); /* No room in string to get this */
160 margc++;
161 cp++;
162 }
163 while ((c = *cp)) {
164 int inquote = 0;
165 while (isspace(c))
166 c = *++cp;
167 if (c == '\0')
168 break;
169 *argp++ = cp;
170 margc += 1;
171 for (cp2 = cp; c != '\0'; c = *++cp) {
172 if (inquote) {
173 if (c == inquote) {
174 inquote = 0;
175 continue;
176 }
177 } else {
178 if (c == '\\') {
179 if ((c = *++cp) == '\0')
180 break;
181 } else if (c == '"') {
182 inquote = '"';
183 continue;
184 } else if (c == '\'') {
185 inquote = '\'';
186 continue;
187 } else if (isspace(c))
188 break;
189 }
190 *cp2++ = c;
191 }
192 *cp2 = '\0';
193 if (c == '\0')
194 break;
195 cp++;
196 }
197 *argp++ = NULL;
198 }
199
200 /*
201 * Make a character string into a number.
202 *
203 * Todo: 1. Could take random integers (12, 0x12, 012, 0b1).
204 */
205
206 static int
207 special(char *s)
208 {
209 char c;
210 char b;
211
212 switch (*s) {
213 case '^':
214 b = *++s;
215 if (b == '?') {
216 c = b | 0x40; /* DEL */
217 } else {
218 c = b & 0x1f;
219 }
220 break;
221 default:
222 c = *s;
223 break;
224 }
225 return c;
226 }
227
228 /*
229 * Construct a control character sequence
230 * for a special character.
231 */
232 static const char *
233 control(cc_t c)
234 {
235 static char buf[5];
236 /*
237 * The only way I could get the Sun 3.5 compiler
238 * to shut up about
239 * if ((unsigned int)c >= 0x80)
240 * was to assign "c" to an unsigned int variable...
241 * Arggg....
242 */
243 unsigned int uic = (unsigned int)c;
244
245 if (uic == 0x7f)
246 return ("^?");
247 if (c == (cc_t)_POSIX_VDISABLE) {
248 return "off";
249 }
250 if (uic >= 0x80) {
251 buf[0] = '\\';
252 buf[1] = ((c>>6)&07) + '0';
253 buf[2] = ((c>>3)&07) + '0';
254 buf[3] = (c&07) + '0';
255 buf[4] = 0;
256 } else if (uic >= 0x20) {
257 buf[0] = c;
258 buf[1] = 0;
259 } else {
260 buf[0] = '^';
261 buf[1] = '@'+c;
262 buf[2] = 0;
263 }
264 return (buf);
265 }
266
267 /*
268 * The following are data structures and routines for
269 * the "send" command.
270 *
271 */
272
273 struct sendlist {
274 const char *name; /* How user refers to it (case independent) */
275 const char *help; /* Help information (0 ==> no help) */
276 int needconnect; /* Need to be connected */
277 int narg; /* Number of arguments */
278 int (*handler)(char *, ...); /* Routine to perform (for special ops) */
279 int nbyte; /* Number of bytes to send this command */
280 int what; /* Character to be sent (<0 ==> special) */
281 };
282 \f
283
284 static int
285 send_esc(void),
286 send_help(void),
287 send_docmd(char *),
288 send_dontcmd(char *),
289 send_willcmd(char *),
290 send_wontcmd(char *);
291
292 static struct sendlist Sendlist[] = {
293 { "ao", "Send Telnet Abort output", 1, 0, NULL, 2, AO },
294 { "ayt", "Send Telnet 'Are You There'", 1, 0, NULL, 2, AYT },
295 { "brk", "Send Telnet Break", 1, 0, NULL, 2, BREAK },
296 { "break", NULL, 1, 0, NULL, 2, BREAK },
297 { "ec", "Send Telnet Erase Character", 1, 0, NULL, 2, EC },
298 { "el", "Send Telnet Erase Line", 1, 0, NULL, 2, EL },
299 { "escape", "Send current escape character",1, 0, (int (*)(char *, ...))send_esc, 1, 0 },
300 { "ga", "Send Telnet 'Go Ahead' sequence", 1, 0, NULL, 2, GA },
301 { "ip", "Send Telnet Interrupt Process",1, 0, NULL, 2, IP },
302 { "intp", NULL, 1, 0, NULL, 2, IP },
303 { "interrupt", NULL, 1, 0, NULL, 2, IP },
304 { "intr", NULL, 1, 0, NULL, 2, IP },
305 { "nop", "Send Telnet 'No operation'", 1, 0, NULL, 2, NOP },
306 { "eor", "Send Telnet 'End of Record'", 1, 0, NULL, 2, EOR },
307 { "abort", "Send Telnet 'Abort Process'", 1, 0, NULL, 2, ABORT },
308 { "susp", "Send Telnet 'Suspend Process'",1, 0, NULL, 2, SUSP },
309 { "eof", "Send Telnet End of File Character", 1, 0, NULL, 2, xEOF },
310 { "synch", "Perform Telnet 'Synch operation'", 1, 0, (int (*)(char *, ...))dosynch, 2, 0 },
311 { "getstatus", "Send request for STATUS", 1, 0, (int (*)(char *, ...))get_status, 6, 0 },
312 { "?", "Display send options", 0, 0, (int (*)(char *, ...))send_help, 0, 0 },
313 { "help", NULL, 0, 0, (int (*)(char *, ...))send_help, 0, 0 },
314 { "do", NULL, 0, 1, (int (*)(char *, ...))send_docmd, 3, 0 },
315 { "dont", NULL, 0, 1, (int (*)(char *, ...))send_dontcmd, 3, 0 },
316 { "will", NULL, 0, 1, (int (*)(char *, ...))send_willcmd, 3, 0 },
317 { "wont", NULL, 0, 1, (int (*)(char *, ...))send_wontcmd, 3, 0 },
318 { NULL, NULL, 0, 0, NULL, 0, 0 }
319 };
320
321 #define GETSEND(name) ((struct sendlist *) genget(name, (char **) Sendlist, \
322 sizeof(struct sendlist)))
323
324 static int
325 sendcmd(int argc, char *argv[])
326 {
327 int count; /* how many bytes we are going to need to send */
328 int i;
329 struct sendlist *s; /* pointer to current command */
330 int success = 0;
331 int needconnect = 0;
332
333 if (argc < 2) {
334 printf("need at least one argument for 'send' command\n");
335 printf("'send ?' for help\n");
336 return 0;
337 }
338 /*
339 * First, validate all the send arguments.
340 * In addition, we see how much space we are going to need, and
341 * whether or not we will be doing a "SYNCH" operation (which
342 * flushes the network queue).
343 */
344 count = 0;
345 for (i = 1; i < argc; i++) {
346 s = GETSEND(argv[i]);
347 if (s == NULL) {
348 printf("Unknown send argument '%s'\n'send ?' for help.\n",
349 argv[i]);
350 return 0;
351 } else if (Ambiguous((void *)s)) {
352 printf("Ambiguous send argument '%s'\n'send ?' for help.\n",
353 argv[i]);
354 return 0;
355 }
356 if (i + s->narg >= argc) {
357 fprintf(stderr,
358 "Need %d argument%s to 'send %s' command. 'send %s ?' for help.\n",
359 s->narg, s->narg == 1 ? "" : "s", s->name, s->name);
360 return 0;
361 }
362 count += s->nbyte;
363 if ((void *)s->handler == (void *)send_help) {
364 send_help();
365 return 0;
366 }
367
368 i += s->narg;
369 needconnect += s->needconnect;
370 }
371 if (!connected && needconnect) {
372 printf("?Need to be connected first.\n");
373 printf("'send ?' for help\n");
374 return 0;
375 }
376 /* Now, do we have enough room? */
377 if (NETROOM() < count) {
378 printf("There is not enough room in the buffer TO the network\n");
379 printf("to process your request. Nothing will be done.\n");
380 printf("('send synch' will throw away most data in the network\n");
381 printf("buffer, if this might help.)\n");
382 return 0;
383 }
384 /* OK, they are all OK, now go through again and actually send */
385 count = 0;
386 for (i = 1; i < argc; i++) {
387 if ((s = GETSEND(argv[i])) == NULL) {
388 fprintf(stderr, "Telnet 'send' error - argument disappeared!\n");
389 quit();
390 /*NOTREACHED*/
391 }
392 if (s->handler) {
393 count++;
394 success += (*s->handler)((s->narg > 0) ? argv[i+1] : 0,
395 (s->narg > 1) ? argv[i+2] : 0);
396 i += s->narg;
397 } else {
398 NET2ADD(IAC, s->what);
399 printoption("SENT", IAC, s->what);
400 }
401 }
402 return (count == success);
403 }
404
405 static int
406 send_esc(void)
407 {
408 NETADD(escape);
409 return 1;
410 }
411
412 static int
413 send_docmd(char *name)
414 {
415 return(send_tncmd(send_do, "do", name));
416 }
417
418 static int
419 send_dontcmd(char *name)
420 {
421 return(send_tncmd(send_dont, "dont", name));
422 }
423
424 static int
425 send_willcmd(char *name)
426 {
427 return(send_tncmd(send_will, "will", name));
428 }
429
430 static int
431 send_wontcmd(char *name)
432 {
433 return(send_tncmd(send_wont, "wont", name));
434 }
435
436 static int
437 send_tncmd(void (*func)(int, int), const char *cmd, char *name)
438 {
439 char **cpp;
440 extern char *telopts[];
441 int val = 0;
442
443 if (isprefix(name, "help") || isprefix(name, "?")) {
444 int col, len;
445
446 printf("Usage: send %s <value|option>\n", cmd);
447 printf("\"value\" must be from 0 to 255\n");
448 printf("Valid options are:\n\t");
449
450 col = 8;
451 for (cpp = telopts; *cpp; cpp++) {
452 len = strlen(*cpp) + 3;
453 if (col + len > 65) {
454 printf("\n\t");
455 col = 8;
456 }
457 printf(" \"%s\"", *cpp);
458 col += len;
459 }
460 printf("\n");
461 return 0;
462 }
463 cpp = (char **)genget(name, telopts, sizeof(char *));
464 if (Ambiguous(cpp)) {
465 fprintf(stderr,"'%s': ambiguous argument ('send %s ?' for help).\n",
466 name, cmd);
467 return 0;
468 }
469 if (cpp) {
470 val = cpp - telopts;
471 } else {
472 char *cp = name;
473
474 while (*cp >= '0' && *cp <= '9') {
475 val *= 10;
476 val += *cp - '0';
477 cp++;
478 }
479 if (*cp != 0) {
480 fprintf(stderr, "'%s': unknown argument ('send %s ?' for help).\n",
481 name, cmd);
482 return 0;
483 } else if (val < 0 || val > 255) {
484 fprintf(stderr, "'%s': bad value ('send %s ?' for help).\n",
485 name, cmd);
486 return 0;
487 }
488 }
489 if (!connected) {
490 printf("?Need to be connected first.\n");
491 return 0;
492 }
493 (*func)(val, 1);
494 return 1;
495 }
496
497 static int
498 send_help(void)
499 {
500 struct sendlist *s; /* pointer to current command */
501 for (s = Sendlist; s->name; s++) {
502 if (s->help)
503 printf("%-15s %s\n", s->name, s->help);
504 }
505 return(0);
506 }
507 \f
508 /*
509 * The following are the routines and data structures referred
510 * to by the arguments to the "toggle" command.
511 */
512
513 static int
514 lclchars(void)
515 {
516 donelclchars = 1;
517 return 1;
518 }
519
520 static int
521 togdebug(void)
522 {
523 #ifndef NOT43
524 if (net > 0 &&
525 (SetSockOpt(net, SOL_SOCKET, SO_DEBUG, debug)) < 0) {
526 perror("setsockopt (SO_DEBUG)");
527 }
528 #else /* NOT43 */
529 if (debug) {
530 if (net > 0 && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 1) < 0)
531 perror("setsockopt (SO_DEBUG)");
532 } else
533 printf("Cannot turn off socket debugging\n");
534 #endif /* NOT43 */
535 return 1;
536 }
537
538
539 static int
540 togcrlf(void)
541 {
542 if (crlf) {
543 printf("Will send carriage returns as telnet <CR><LF>.\n");
544 } else {
545 printf("Will send carriage returns as telnet <CR><NUL>.\n");
546 }
547 return 1;
548 }
549
550 int binmode;
551
552 static int
553 togbinary(int val)
554 {
555 donebinarytoggle = 1;
556
557 if (val >= 0) {
558 binmode = val;
559 } else {
560 if (my_want_state_is_will(TELOPT_BINARY) &&
561 my_want_state_is_do(TELOPT_BINARY)) {
562 binmode = 1;
563 } else if (my_want_state_is_wont(TELOPT_BINARY) &&
564 my_want_state_is_dont(TELOPT_BINARY)) {
565 binmode = 0;
566 }
567 val = binmode ? 0 : 1;
568 }
569
570 if (val == 1) {
571 if (my_want_state_is_will(TELOPT_BINARY) &&
572 my_want_state_is_do(TELOPT_BINARY)) {
573 printf("Already operating in binary mode with remote host.\n");
574 } else {
575 printf("Negotiating binary mode with remote host.\n");
576 tel_enter_binary(3);
577 }
578 } else {
579 if (my_want_state_is_wont(TELOPT_BINARY) &&
580 my_want_state_is_dont(TELOPT_BINARY)) {
581 printf("Already in network ascii mode with remote host.\n");
582 } else {
583 printf("Negotiating network ascii mode with remote host.\n");
584 tel_leave_binary(3);
585 }
586 }
587 return 1;
588 }
589
590 static int
591 togrbinary(int val)
592 {
593 donebinarytoggle = 1;
594
595 if (val == -1)
596 val = my_want_state_is_do(TELOPT_BINARY) ? 0 : 1;
597
598 if (val == 1) {
599 if (my_want_state_is_do(TELOPT_BINARY)) {
600 printf("Already receiving in binary mode.\n");
601 } else {
602 printf("Negotiating binary mode on input.\n");
603 tel_enter_binary(1);
604 }
605 } else {
606 if (my_want_state_is_dont(TELOPT_BINARY)) {
607 printf("Already receiving in network ascii mode.\n");
608 } else {
609 printf("Negotiating network ascii mode on input.\n");
610 tel_leave_binary(1);
611 }
612 }
613 return 1;
614 }
615
616 static int
617 togxbinary(int val)
618 {
619 donebinarytoggle = 1;
620
621 if (val == -1)
622 val = my_want_state_is_will(TELOPT_BINARY) ? 0 : 1;
623
624 if (val == 1) {
625 if (my_want_state_is_will(TELOPT_BINARY)) {
626 printf("Already transmitting in binary mode.\n");
627 } else {
628 printf("Negotiating binary mode on output.\n");
629 tel_enter_binary(2);
630 }
631 } else {
632 if (my_want_state_is_wont(TELOPT_BINARY)) {
633 printf("Already transmitting in network ascii mode.\n");
634 } else {
635 printf("Negotiating network ascii mode on output.\n");
636 tel_leave_binary(2);
637 }
638 }
639 return 1;
640 }
641
642 struct togglelist {
643 const char *name; /* name of toggle */
644 const char *help; /* help message */
645 int (*handler)(int); /* routine to do actual setting */
646 int *variable;
647 const char *actionexplanation;
648 };
649
650 static struct togglelist Togglelist[] = {
651 { "autoflush",
652 "flushing of output when sending interrupt characters",
653 0,
654 &autoflush,
655 "flush output when sending interrupt characters" },
656 { "autosynch",
657 "automatic sending of interrupt characters in urgent mode",
658 0,
659 &autosynch,
660 "send interrupt characters in urgent mode" },
661 #ifdef AUTHENTICATION
662 { "autologin",
663 "automatic sending of login and/or authentication info",
664 0,
665 &autologin,
666 "send login name and/or authentication information" },
667 { "authdebug",
668 "Toggle authentication debugging",
669 auth_togdebug,
670 0,
671 "print authentication debugging information" },
672 #endif
673 #ifdef ENCRYPTION
674 { "autoencrypt",
675 "automatic encryption of data stream",
676 EncryptAutoEnc,
677 0,
678 "automatically encrypt output" },
679 { "autodecrypt",
680 "automatic decryption of data stream",
681 EncryptAutoDec,
682 0,
683 "automatically decrypt input" },
684 { "verbose_encrypt",
685 "Toggle verbose encryption output",
686 EncryptVerbose,
687 0,
688 "print verbose encryption output" },
689 { "encdebug",
690 "Toggle encryption debugging",
691 EncryptDebug,
692 0,
693 "print encryption debugging information" },
694 #endif /* ENCRYPTION */
695 { "skiprc",
696 "don't read ~/.telnetrc file",
697 0,
698 &skiprc,
699 "skip reading of ~/.telnetrc file" },
700 { "binary",
701 "sending and receiving of binary data",
702 togbinary,
703 0,
704 0 },
705 { "inbinary",
706 "receiving of binary data",
707 togrbinary,
708 0,
709 0 },
710 { "outbinary",
711 "sending of binary data",
712 togxbinary,
713 0,
714 0 },
715 { "crlf",
716 "sending carriage returns as telnet <CR><LF>",
717 (int (*)(int))togcrlf,
718 &crlf,
719 0 },
720 { "crmod",
721 "mapping of received carriage returns",
722 0,
723 &crmod,
724 "map carriage return on output" },
725 { "localchars",
726 "local recognition of certain control characters",
727 (int (*)(int))lclchars,
728 &localchars,
729 "recognize certain control characters" },
730 { " ", "", NULL, NULL, NULL }, /* empty line */
731 { "debug",
732 "debugging",
733 (int (*)(int))togdebug,
734 &debug,
735 "turn on socket level debugging" },
736 { "netdata",
737 "printing of hexadecimal network data (debugging)",
738 0,
739 &netdata,
740 "print hexadecimal representation of network traffic" },
741 { "prettydump",
742 "output of \"netdata\" to user readable format (debugging)",
743 0,
744 &prettydump,
745 "print user readable output for \"netdata\"" },
746 { "options",
747 "viewing of options processing (debugging)",
748 0,
749 &showoptions,
750 "show option processing" },
751 { "termdata",
752 "(debugging) toggle printing of hexadecimal terminal data",
753 0,
754 &termdata,
755 "print hexadecimal representation of terminal traffic" },
756 { "?",
757 NULL,
758 (int (*)(int))togglehelp,
759 NULL,
760 NULL },
761 { NULL, NULL, NULL, NULL, NULL },
762 { "help",
763 NULL,
764 (int (*)(int))togglehelp,
765 NULL,
766 NULL },
767 { NULL, NULL, NULL, NULL, NULL }
768 };
769
770 static int
771 togglehelp(void)
772 {
773 struct togglelist *c;
774
775 for (c = Togglelist; c->name; c++) {
776 if (c->help) {
777 if (*c->help)
778 printf("%-15s toggle %s\n", c->name, c->help);
779 else
780 printf("\n");
781 }
782 }
783 printf("\n");
784 printf("%-15s %s\n", "?", "display help information");
785 return 0;
786 }
787
788 static void
789 settogglehelp(int set)
790 {
791 struct togglelist *c;
792
793 for (c = Togglelist; c->name; c++) {
794 if (c->help) {
795 if (*c->help)
796 printf("%-15s %s %s\n", c->name, set ? "enable" : "disable",
797 c->help);
798 else
799 printf("\n");
800 }
801 }
802 }
803
804 #define GETTOGGLE(name) (struct togglelist *) \
805 genget(name, (char **) Togglelist, sizeof(struct togglelist))
806
807 static int
808 toggle(int argc, char *argv[])
809 {
810 int retval = 1;
811 char *name;
812 struct togglelist *c;
813
814 if (argc < 2) {
815 fprintf(stderr,
816 "Need an argument to 'toggle' command. 'toggle ?' for help.\n");
817 return 0;
818 }
819 argc--;
820 argv++;
821 while (argc--) {
822 name = *argv++;
823 c = GETTOGGLE(name);
824 if (Ambiguous((void *)c)) {
825 fprintf(stderr, "'%s': ambiguous argument ('toggle ?' for help).\n",
826 name);
827 return 0;
828 } else if (c == NULL) {
829 fprintf(stderr, "'%s': unknown argument ('toggle ?' for help).\n",
830 name);
831 return 0;
832 } else {
833 if (c->variable) {
834 *c->variable = !*c->variable; /* invert it */
835 if (c->actionexplanation) {
836 printf("%s %s.\n", *c->variable? "Will" : "Won't",
837 c->actionexplanation);
838 }
839 }
840 if (c->handler) {
841 retval &= (*c->handler)(-1);
842 }
843 }
844 }
845 return retval;
846 }
847 \f
848 /*
849 * The following perform the "set" command.
850 */
851
852 #ifdef USE_TERMIO
853 struct termio new_tc = { 0, 0, 0, 0, {}, 0, 0 };
854 #endif
855
856 struct setlist {
857 const char *name; /* name */
858 const char *help; /* help information */
859 void (*handler)(char *);
860 cc_t *charp; /* where it is located at */
861 };
862
863 static struct setlist Setlist[] = {
864 #ifdef KLUDGELINEMODE
865 { "echo", "character to toggle local echoing on/off", NULL, &echoc },
866 #endif
867 { "escape", "character to escape back to telnet command mode", NULL, &escape },
868 { "rlogin", "rlogin escape character", 0, &rlogin },
869 { "tracefile", "file to write trace information to", SetNetTrace, (cc_t *)NetTraceFile},
870 { " ", "", NULL, NULL },
871 { " ", "The following need 'localchars' to be toggled true", NULL, NULL },
872 { "flushoutput", "character to cause an Abort Output", NULL, termFlushCharp },
873 { "interrupt", "character to cause an Interrupt Process", NULL, termIntCharp },
874 { "quit", "character to cause an Abort process", NULL, termQuitCharp },
875 { "eof", "character to cause an EOF ", NULL, termEofCharp },
876 { " ", "", NULL, NULL },
877 { " ", "The following are for local editing in linemode", NULL, NULL },
878 { "erase", "character to use to erase a character", NULL, termEraseCharp },
879 { "kill", "character to use to erase a line", NULL, termKillCharp },
880 { "lnext", "character to use for literal next", NULL, termLiteralNextCharp },
881 { "susp", "character to cause a Suspend Process", NULL, termSuspCharp },
882 { "reprint", "character to use for line reprint", NULL, termRprntCharp },
883 { "worderase", "character to use to erase a word", NULL, termWerasCharp },
884 { "start", "character to use for XON", NULL, termStartCharp },
885 { "stop", "character to use for XOFF", NULL, termStopCharp },
886 { "forw1", "alternate end of line character", NULL, termForw1Charp },
887 { "forw2", "alternate end of line character", NULL, termForw2Charp },
888 { "ayt", "alternate AYT character", NULL, termAytCharp },
889 { NULL, NULL, NULL, NULL }
890 };
891
892 static struct setlist *
893 getset(char *name)
894 {
895 return (struct setlist *)
896 genget(name, (char **) Setlist, sizeof(struct setlist));
897 }
898
899 void
900 set_escape_char(char *s)
901 {
902 if (rlogin != _POSIX_VDISABLE) {
903 rlogin = (s && *s) ? special(s) : _POSIX_VDISABLE;
904 printf("Telnet rlogin escape character is '%s'.\n",
905 control(rlogin));
906 } else {
907 escape = (s && *s) ? special(s) : _POSIX_VDISABLE;
908 printf("Telnet escape character is '%s'.\n", control(escape));
909 }
910 }
911
912 static int
913 setcmd(int argc, char *argv[])
914 {
915 int value;
916 struct setlist *ct;
917 struct togglelist *c;
918
919 if (argc < 2 || argc > 3) {
920 printf("Format is 'set Name Value'\n'set ?' for help.\n");
921 return 0;
922 }
923 if ((argc == 2) && (isprefix(argv[1], "?") || isprefix(argv[1], "help"))) {
924 for (ct = Setlist; ct->name; ct++)
925 printf("%-15s %s\n", ct->name, ct->help);
926 printf("\n");
927 settogglehelp(1);
928 printf("%-15s %s\n", "?", "display help information");
929 return 0;
930 }
931
932 ct = getset(argv[1]);
933 if (ct == NULL) {
934 c = GETTOGGLE(argv[1]);
935 if (c == NULL) {
936 fprintf(stderr, "'%s': unknown argument ('set ?' for help).\n",
937 argv[1]);
938 return 0;
939 } else if (Ambiguous((void *)c)) {
940 fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n",
941 argv[1]);
942 return 0;
943 }
944 if (c->variable) {
945 if ((argc == 2) || (strcmp("on", argv[2]) == 0))
946 *c->variable = 1;
947 else if (strcmp("off", argv[2]) == 0)
948 *c->variable = 0;
949 else {
950 printf("Format is 'set togglename [on|off]'\n'set ?' for help.\n");
951 return 0;
952 }
953 if (c->actionexplanation) {
954 printf("%s %s.\n", *c->variable? "Will" : "Won't",
955 c->actionexplanation);
956 }
957 }
958 if (c->handler)
959 (*c->handler)(1);
960 } else if (argc != 3) {
961 printf("Format is 'set Name Value'\n'set ?' for help.\n");
962 return 0;
963 } else if (Ambiguous((void *)ct)) {
964 fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n",
965 argv[1]);
966 return 0;
967 } else if (ct->handler) {
968 (*ct->handler)(argv[2]);
969 printf("%s set to \"%s\".\n", ct->name, (char *)ct->charp);
970 } else {
971 if (strcmp("off", argv[2])) {
972 value = special(argv[2]);
973 } else {
974 value = _POSIX_VDISABLE;
975 }
976 *(ct->charp) = (cc_t)value;
977 printf("%s character is '%s'.\n", ct->name, control(*(ct->charp)));
978 }
979 slc_check();
980 return 1;
981 }
982
983 static int
984 unsetcmd(int argc, char *argv[])
985 {
986 struct setlist *ct;
987 struct togglelist *c;
988 char *name;
989
990 if (argc < 2) {
991 fprintf(stderr,
992 "Need an argument to 'unset' command. 'unset ?' for help.\n");
993 return 0;
994 }
995 if (isprefix(argv[1], "?") || isprefix(argv[1], "help")) {
996 for (ct = Setlist; ct->name; ct++)
997 printf("%-15s %s\n", ct->name, ct->help);
998 printf("\n");
999 settogglehelp(0);
1000 printf("%-15s %s\n", "?", "display help information");
1001 return 0;
1002 }
1003
1004 argc--;
1005 argv++;
1006 while (argc--) {
1007 name = *argv++;
1008 ct = getset(name);
1009 if (ct == NULL) {
1010 c = GETTOGGLE(name);
1011 if (c == NULL) {
1012 fprintf(stderr, "'%s': unknown argument ('unset ?' for help).\n",
1013 name);
1014 return 0;
1015 } else if (Ambiguous((void *)c)) {
1016 fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\n",
1017 name);
1018 return 0;
1019 }
1020 if (c->variable) {
1021 *c->variable = 0;
1022 if (c->actionexplanation) {
1023 printf("%s %s.\n", *c->variable? "Will" : "Won't",
1024 c->actionexplanation);
1025 }
1026 }
1027 if (c->handler)
1028 (*c->handler)(0);
1029 } else if (Ambiguous((void *)ct)) {
1030 fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\n",
1031 name);
1032 return 0;
1033 } else if (ct->handler) {
1034 (*ct->handler)(0);
1035 printf("%s reset to \"%s\".\n", ct->name, (char *)ct->charp);
1036 } else {
1037 *(ct->charp) = _POSIX_VDISABLE;
1038 printf("%s character is '%s'.\n", ct->name, control(*(ct->charp)));
1039 }
1040 }
1041 return 1;
1042 }
1043 \f
1044 /*
1045 * The following are the data structures and routines for the
1046 * 'mode' command.
1047 */
1048 #ifdef KLUDGELINEMODE
1049 extern int kludgelinemode;
1050
1051 static int
1052 dokludgemode(void)
1053 {
1054 kludgelinemode = 1;
1055 send_wont(TELOPT_LINEMODE, 1);
1056 send_dont(TELOPT_SGA, 1);
1057 send_dont(TELOPT_ECHO, 1);
1058 return 1;
1059 }
1060 #endif
1061
1062 static int
1063 dolinemode(void)
1064 {
1065 #ifdef KLUDGELINEMODE
1066 if (kludgelinemode)
1067 send_dont(TELOPT_SGA, 1);
1068 #endif
1069 send_will(TELOPT_LINEMODE, 1);
1070 send_dont(TELOPT_ECHO, 1);
1071 return 1;
1072 }
1073
1074 static int
1075 docharmode(void)
1076 {
1077 #ifdef KLUDGELINEMODE
1078 if (kludgelinemode)
1079 send_do(TELOPT_SGA, 1);
1080 else
1081 #endif
1082 send_wont(TELOPT_LINEMODE, 1);
1083 send_do(TELOPT_ECHO, 1);
1084 return 1;
1085 }
1086
1087 static int
1088 dolmmode(int bit, int on)
1089 {
1090 unsigned char c;
1091 extern int linemode;
1092
1093 if (my_want_state_is_wont(TELOPT_LINEMODE)) {
1094 printf("?Need to have LINEMODE option enabled first.\n");
1095 printf("'mode ?' for help.\n");
1096 return 0;
1097 }
1098
1099 if (on)
1100 c = (linemode | bit);
1101 else
1102 c = (linemode & ~bit);
1103 lm_mode(&c, 1, 1);
1104 return 1;
1105 }
1106
1107 static int
1108 setmod(int bit)
1109 {
1110 return dolmmode(bit, 1);
1111 }
1112
1113 static int
1114 clearmode(int bit)
1115 {
1116 return dolmmode(bit, 0);
1117 }
1118
1119 struct modelist {
1120 const char *name; /* command name */
1121 const char *help; /* help string */
1122 int (*handler)(int);/* routine which executes command */
1123 int needconnect; /* Do we need to be connected to execute? */
1124 int arg1;
1125 };
1126
1127 static struct modelist ModeList[] = {
1128 { "character", "Disable LINEMODE option", (int (*)(int))docharmode, 1, 0 },
1129 #ifdef KLUDGELINEMODE
1130 { "", "(or disable obsolete line-by-line mode)", NULL, 0, 0 },
1131 #endif
1132 { "line", "Enable LINEMODE option", (int (*)(int))dolinemode, 1, 0 },
1133 #ifdef KLUDGELINEMODE
1134 { "", "(or enable obsolete line-by-line mode)", NULL, 0, 0 },
1135 #endif
1136 { "", "", NULL, 0, 0 },
1137 { "", "These require the LINEMODE option to be enabled", NULL, 0, 0 },
1138 { "isig", "Enable signal trapping", setmod, 1, MODE_TRAPSIG },
1139 { "+isig", 0, setmod, 1, MODE_TRAPSIG },
1140 { "-isig", "Disable signal trapping", clearmode, 1, MODE_TRAPSIG },
1141 { "edit", "Enable character editing", setmod, 1, MODE_EDIT },
1142 { "+edit", 0, setmod, 1, MODE_EDIT },
1143 { "-edit", "Disable character editing", clearmode, 1, MODE_EDIT },
1144 { "softtabs", "Enable tab expansion", setmod, 1, MODE_SOFT_TAB },
1145 { "+softtabs", 0, setmod, 1, MODE_SOFT_TAB },
1146 { "-softtabs", "Disable character editing", clearmode, 1, MODE_SOFT_TAB },
1147 { "litecho", "Enable literal character echo", setmod, 1, MODE_LIT_ECHO },
1148 { "+litecho", 0, setmod, 1, MODE_LIT_ECHO },
1149 { "-litecho", "Disable literal character echo", clearmode, 1, MODE_LIT_ECHO },
1150 { "help", 0, (int (*)(int))modehelp, 0, 0 },
1151 #ifdef KLUDGELINEMODE
1152 { "kludgeline", 0, (int (*)(int))dokludgemode, 1, 0 },
1153 #endif
1154 { "", "", NULL, 0, 0 },
1155 { "?", "Print help information", (int (*)(int))modehelp, 0, 0 },
1156 { NULL, NULL, NULL, 0, 0 },
1157 };
1158
1159
1160 static int
1161 modehelp(void)
1162 {
1163 struct modelist *mt;
1164
1165 printf("format is: 'mode Mode', where 'Mode' is one of:\n\n");
1166 for (mt = ModeList; mt->name; mt++) {
1167 if (mt->help) {
1168 if (*mt->help)
1169 printf("%-15s %s\n", mt->name, mt->help);
1170 else
1171 printf("\n");
1172 }
1173 }
1174 return 0;
1175 }
1176
1177 #define GETMODECMD(name) (struct modelist *) \
1178 genget(name, (char **) ModeList, sizeof(struct modelist))
1179
1180 static int
1181 modecmd(int argc, char *argv[])
1182 {
1183 struct modelist *mt;
1184
1185 if (argc != 2) {
1186 printf("'mode' command requires an argument\n");
1187 printf("'mode ?' for help.\n");
1188 } else if ((mt = GETMODECMD(argv[1])) == NULL) {
1189 fprintf(stderr, "Unknown mode '%s' ('mode ?' for help).\n", argv[1]);
1190 } else if (Ambiguous((void *)mt)) {
1191 fprintf(stderr, "Ambiguous mode '%s' ('mode ?' for help).\n", argv[1]);
1192 } else if (mt->needconnect && !connected) {
1193 printf("?Need to be connected first.\n");
1194 printf("'mode ?' for help.\n");
1195 } else if (mt->handler) {
1196 return (*mt->handler)(mt->arg1);
1197 }
1198 return 0;
1199 }
1200 \f
1201 /*
1202 * The following data structures and routines implement the
1203 * "display" command.
1204 */
1205
1206 static int
1207 display(int argc, char *argv[])
1208 {
1209 struct togglelist *tl;
1210 struct setlist *sl;
1211
1212 #define dotog(tl) if (tl->variable && tl->actionexplanation) { \
1213 if (*tl->variable) { \
1214 printf("will"); \
1215 } else { \
1216 printf("won't"); \
1217 } \
1218 printf(" %s.\n", tl->actionexplanation); \
1219 }
1220
1221 #define doset(sl) if (sl->name && *sl->name != ' ') { \
1222 if (sl->handler == 0) \
1223 printf("%-15s [%s]\n", sl->name, control(*sl->charp)); \
1224 else \
1225 printf("%-15s \"%s\"\n", sl->name, (char *)sl->charp); \
1226 }
1227
1228 if (argc == 1) {
1229 for (tl = Togglelist; tl->name; tl++) {
1230 dotog(tl);
1231 }
1232 printf("\n");
1233 for (sl = Setlist; sl->name; sl++) {
1234 doset(sl);
1235 }
1236 } else {
1237 int i;
1238
1239 for (i = 1; i < argc; i++) {
1240 sl = getset(argv[i]);
1241 tl = GETTOGGLE(argv[i]);
1242 if (Ambiguous((void *)sl) || Ambiguous((void *)tl)) {
1243 printf("?Ambiguous argument '%s'.\n", argv[i]);
1244 return 0;
1245 } else if (!sl && !tl) {
1246 printf("?Unknown argument '%s'.\n", argv[i]);
1247 return 0;
1248 } else {
1249 if (tl) {
1250 dotog(tl);
1251 }
1252 if (sl) {
1253 doset(sl);
1254 }
1255 }
1256 }
1257 }
1258 /*@*/optionstatus();
1259 #ifdef ENCRYPTION
1260 EncryptStatus();
1261 #endif /* ENCRYPTION */
1262 return 1;
1263 #undef doset
1264 #undef dotog
1265 }
1266 \f
1267 /*
1268 * The following are the data structures, and many of the routines,
1269 * relating to command processing.
1270 */
1271
1272 /*
1273 * Set the escape character.
1274 */
1275 static int
1276 setescape(int argc, char *argv[])
1277 {
1278 char *arg;
1279 char buf[50];
1280
1281 printf(
1282 "Deprecated usage - please use 'set escape%s%s' in the future.\n",
1283 (argc > 2)? " ":"", (argc > 2)? argv[1]: "");
1284 if (argc > 2)
1285 arg = argv[1];
1286 else {
1287 printf("new escape character: ");
1288 (void) fgets(buf, sizeof(buf), stdin);
1289 arg = buf;
1290 }
1291 if (arg[0] != '\0')
1292 escape = arg[0];
1293 (void) fflush(stdout);
1294 return 1;
1295 }
1296
1297 static int
1298 togcrmod(void)
1299 {
1300 crmod = !crmod;
1301 printf("Deprecated usage - please use 'toggle crmod' in the future.\n");
1302 printf("%s map carriage return on output.\n", crmod ? "Will" : "Won't");
1303 (void) fflush(stdout);
1304 return 1;
1305 }
1306
1307 static int
1308 suspend(void)
1309 {
1310 #ifdef SIGTSTP
1311 setcommandmode();
1312 {
1313 long oldrows, oldcols, newrows, newcols, err_;
1314
1315 err_ = (TerminalWindowSize(&oldrows, &oldcols) == 0) ? 1 : 0;
1316 (void) kill(0, SIGTSTP);
1317 /*
1318 * If we didn't get the window size before the SUSPEND, but we
1319 * can get them now (?), then send the NAWS to make sure that
1320 * we are set up for the right window size.
1321 */
1322 if (TerminalWindowSize(&newrows, &newcols) && connected &&
1323 (err_ || ((oldrows != newrows) || (oldcols != newcols)))) {
1324 sendnaws();
1325 }
1326 }
1327 /* reget parameters in case they were changed */
1328 TerminalSaveState();
1329 setconnmode(0);
1330 #else
1331 printf("Suspend is not supported. Try the '!' command instead\n");
1332 #endif
1333 return 1;
1334 }
1335
1336 static int
1337 shell(int argc, char *argv[] __unused)
1338 {
1339 long oldrows, oldcols, newrows, newcols, err_;
1340
1341 setcommandmode();
1342
1343 err_ = (TerminalWindowSize(&oldrows, &oldcols) == 0) ? 1 : 0;
1344 switch(vfork()) {
1345 case -1:
1346 perror("Fork failed\n");
1347 break;
1348
1349 case 0:
1350 {
1351 /*
1352 * Fire up the shell in the child.
1353 */
1354 const char *shellp, *shellname;
1355
1356 shellp = getenv("SHELL");
1357 if (shellp == NULL)
1358 shellp = "/bin/sh";
1359 if ((shellname = strrchr(shellp, '/')) == NULL)
1360 shellname = shellp;
1361 else
1362 shellname++;
1363 if (argc > 1)
1364 execl(shellp, shellname, "-c", &saveline[1], NULL);
1365 else
1366 execl(shellp, shellname, NULL);
1367 perror("Execl");
1368 _exit(1);
1369 }
1370 default:
1371 (void)wait(NULL); /* Wait for the shell to complete */
1372
1373 if (TerminalWindowSize(&newrows, &newcols) && connected &&
1374 (err_ || ((oldrows != newrows) || (oldcols != newcols)))) {
1375 sendnaws();
1376 }
1377 break;
1378 }
1379 return 1;
1380 }
1381
1382 static int
1383 bye(int argc, char *argv[])
1384 {
1385 extern int resettermname;
1386
1387 if (connected) {
1388 (void) shutdown(net, SHUT_RDWR);
1389 printf("Connection closed.\n");
1390 (void) NetClose(net);
1391 connected = 0;
1392 resettermname = 1;
1393 #ifdef AUTHENTICATION
1394 #ifdef ENCRYPTION
1395 auth_encrypt_connect(connected);
1396 #endif
1397 #endif
1398 /* reset options */
1399 tninit();
1400 }
1401 if ((argc != 2) || (strcmp(argv[1], "fromquit") != 0)) {
1402 longjmp(toplevel, 1);
1403 /* NOTREACHED */
1404 }
1405 return 1; /* Keep lint, etc., happy */
1406 }
1407
1408 void
1409 quit(void)
1410 {
1411 (void) call(bye, "bye", "fromquit", 0);
1412 Exit(0);
1413 }
1414
1415 static int
1416 logout(void)
1417 {
1418 send_do(TELOPT_LOGOUT, 1);
1419 (void) netflush();
1420 return 1;
1421 }
1422
1423 \f
1424 /*
1425 * The SLC command.
1426 */
1427
1428 struct slclist {
1429 const char *name;
1430 const char *help;
1431 void (*handler)(int);
1432 int arg;
1433 };
1434
1435 static void slc_help(void);
1436
1437 struct slclist SlcList[] = {
1438 { "export", "Use local special character definitions",
1439 (void (*)(int))slc_mode_export, 0 },
1440 { "import", "Use remote special character definitions",
1441 slc_mode_import, 1 },
1442 { "check", "Verify remote special character definitions",
1443 slc_mode_import, 0 },
1444 { "help", NULL, (void (*)(int))slc_help, 0 },
1445 { "?", "Print help information", (void (*)(int))slc_help, 0 },
1446 { NULL, NULL, NULL, 0 },
1447 };
1448
1449 static void
1450 slc_help(void)
1451 {
1452 struct slclist *c;
1453
1454 for (c = SlcList; c->name; c++) {
1455 if (c->help) {
1456 if (*c->help)
1457 printf("%-15s %s\n", c->name, c->help);
1458 else
1459 printf("\n");
1460 }
1461 }
1462 }
1463
1464 static struct slclist *
1465 getslc(char *name)
1466 {
1467 return (struct slclist *)
1468 genget(name, (char **) SlcList, sizeof(struct slclist));
1469 }
1470
1471 static int
1472 slccmd(int argc, char *argv[])
1473 {
1474 struct slclist *c;
1475
1476 if (argc != 2) {
1477 fprintf(stderr,
1478 "Need an argument to 'slc' command. 'slc ?' for help.\n");
1479 return 0;
1480 }
1481 c = getslc(argv[1]);
1482 if (c == NULL) {
1483 fprintf(stderr, "'%s': unknown argument ('slc ?' for help).\n",
1484 argv[1]);
1485 return 0;
1486 }
1487 if (Ambiguous((void *)c)) {
1488 fprintf(stderr, "'%s': ambiguous argument ('slc ?' for help).\n",
1489 argv[1]);
1490 return 0;
1491 }
1492 (*c->handler)(c->arg);
1493 slcstate();
1494 return 1;
1495 }
1496 \f
1497 /*
1498 * The ENVIRON command.
1499 */
1500
1501 struct envlist {
1502 const char *name;
1503 const char *help;
1504 void (*handler)(unsigned char *, unsigned char *);
1505 int narg;
1506 };
1507
1508 extern struct env_lst *
1509 env_define(const unsigned char *, unsigned char *);
1510 extern void
1511 env_undefine(unsigned char *),
1512 env_export(const unsigned char *),
1513 env_unexport(const unsigned char *),
1514 env_send(unsigned char *),
1515 #if defined(OLD_ENVIRON) && defined(ENV_HACK)
1516 env_varval(unsigned char *),
1517 #endif
1518 env_list(void);
1519 static void
1520 env_help(void);
1521
1522 struct envlist EnvList[] = {
1523 { "define", "Define an environment variable",
1524 (void (*)(unsigned char *, unsigned char *))env_define, 2 },
1525 { "undefine", "Undefine an environment variable",
1526 (void (*)(unsigned char *, unsigned char *))env_undefine, 1 },
1527 { "export", "Mark an environment variable for automatic export",
1528 (void (*)(unsigned char *, unsigned char *))env_export, 1 },
1529 { "unexport", "Don't mark an environment variable for automatic export",
1530 (void (*)(unsigned char *, unsigned char *))env_unexport, 1 },
1531 { "send", "Send an environment variable", (void (*)(unsigned char *, unsigned char *))env_send, 1 },
1532 { "list", "List the current environment variables",
1533 (void (*)(unsigned char *, unsigned char *))env_list, 0 },
1534 #if defined(OLD_ENVIRON) && defined(ENV_HACK)
1535 { "varval", "Reverse VAR and VALUE (auto, right, wrong, status)",
1536 (void (*)(unsigned char *, unsigned char *))env_varval, 1 },
1537 #endif
1538 { "help", NULL, (void (*)(unsigned char *, unsigned char *))env_help, 0 },
1539 { "?", "Print help information", (void (*)(unsigned char *, unsigned char *))env_help, 0 },
1540 { NULL, NULL, NULL, 0 },
1541 };
1542
1543 static void
1544 env_help(void)
1545 {
1546 struct envlist *c;
1547
1548 for (c = EnvList; c->name; c++) {
1549 if (c->help) {
1550 if (*c->help)
1551 printf("%-15s %s\n", c->name, c->help);
1552 else
1553 printf("\n");
1554 }
1555 }
1556 }
1557
1558 static struct envlist *
1559 getenvcmd(char *name)
1560 {
1561 return (struct envlist *)
1562 genget(name, (char **) EnvList, sizeof(struct envlist));
1563 }
1564
1565 static int
1566 env_cmd(int argc, char *argv[])
1567 {
1568 struct envlist *c;
1569
1570 if (argc < 2) {
1571 fprintf(stderr,
1572 "Need an argument to 'environ' command. 'environ ?' for help.\n");
1573 return 0;
1574 }
1575 c = getenvcmd(argv[1]);
1576 if (c == NULL) {
1577 fprintf(stderr, "'%s': unknown argument ('environ ?' for help).\n",
1578 argv[1]);
1579 return 0;
1580 }
1581 if (Ambiguous((void *)c)) {
1582 fprintf(stderr, "'%s': ambiguous argument ('environ ?' for help).\n",
1583 argv[1]);
1584 return 0;
1585 }
1586 if (c->narg + 2 != argc) {
1587 fprintf(stderr,
1588 "Need %s%d argument%s to 'environ %s' command. 'environ ?' for help.\n",
1589 c->narg < argc + 2 ? "only " : "",
1590 c->narg, c->narg == 1 ? "" : "s", c->name);
1591 return 0;
1592 }
1593 (*c->handler)(argv[2], argv[3]);
1594 return 1;
1595 }
1596
1597 struct env_lst {
1598 struct env_lst *next; /* pointer to next structure */
1599 struct env_lst *prev; /* pointer to previous structure */
1600 unsigned char *var; /* pointer to variable name */
1601 unsigned char *value; /* pointer to variable value */
1602 int export; /* 1 -> export with default list of variables */
1603 int welldefined; /* A well defined variable */
1604 };
1605
1606 struct env_lst envlisthead;
1607
1608 static struct env_lst *
1609 env_find(const unsigned char *var)
1610 {
1611 struct env_lst *ep;
1612
1613 for (ep = envlisthead.next; ep; ep = ep->next) {
1614 if (strcmp(ep->var, var) == 0)
1615 return(ep);
1616 }
1617 return(NULL);
1618 }
1619
1620 void
1621 env_init(void)
1622 {
1623 extern char **environ;
1624 char **epp, *cp;
1625 struct env_lst *ep;
1626
1627 for (epp = environ; *epp; epp++) {
1628 if ((cp = strchr(*epp, '='))) {
1629 *cp = '\0';
1630 ep = env_define((unsigned char *)*epp,
1631 (unsigned char *)cp+1);
1632 ep->export = 0;
1633 *cp = '=';
1634 }
1635 }
1636 /*
1637 * Special case for DISPLAY variable. If it is ":0.0" or
1638 * "unix:0.0", we have to get rid of "unix" and insert our
1639 * hostname.
1640 */
1641 if ((ep = env_find("DISPLAY"))
1642 && ((*ep->value == ':')
1643 || (strncmp((char *)ep->value, "unix:", 5) == 0))) {
1644 char hbuf[256+1];
1645 char *cp2 = strchr((char *)ep->value, ':');
1646
1647 gethostname(hbuf, 256);
1648 hbuf[256] = '\0';
1649 cp = (char *)malloc(strlen(hbuf) + strlen(cp2) + 1);
1650 sprintf((char *)cp, "%s%s", hbuf, cp2);
1651 free(ep->value);
1652 ep->value = (unsigned char *)cp;
1653 }
1654 /*
1655 * If USER is not defined, but LOGNAME is, then add
1656 * USER with the value from LOGNAME. By default, we
1657 * don't export the USER variable.
1658 */
1659 if ((env_find("USER") == NULL) && (ep = env_find("LOGNAME"))) {
1660 env_define("USER", ep->value);
1661 env_unexport("USER");
1662 }
1663 env_export("DISPLAY");
1664 env_export("PRINTER");
1665 }
1666
1667 struct env_lst *
1668 env_define(const unsigned char *var, unsigned char *value)
1669 {
1670 struct env_lst *ep;
1671
1672 if ((ep = env_find(var))) {
1673 if (ep->var)
1674 free(ep->var);
1675 if (ep->value)
1676 free(ep->value);
1677 } else {
1678 ep = (struct env_lst *)malloc(sizeof(struct env_lst));
1679 ep->next = envlisthead.next;
1680 envlisthead.next = ep;
1681 ep->prev = &envlisthead;
1682 if (ep->next)
1683 ep->next->prev = ep;
1684 }
1685 ep->welldefined = opt_welldefined(var);
1686 ep->export = 1;
1687 ep->var = strdup(var);
1688 ep->value = strdup(value);
1689 return(ep);
1690 }
1691
1692 void
1693 env_undefine(unsigned char *var)
1694 {
1695 struct env_lst *ep;
1696
1697 if ((ep = env_find(var))) {
1698 ep->prev->next = ep->next;
1699 if (ep->next)
1700 ep->next->prev = ep->prev;
1701 if (ep->var)
1702 free(ep->var);
1703 if (ep->value)
1704 free(ep->value);
1705 free(ep);
1706 }
1707 }
1708
1709 void
1710 env_export(const unsigned char *var)
1711 {
1712 struct env_lst *ep;
1713
1714 if ((ep = env_find(var)))
1715 ep->export = 1;
1716 }
1717
1718 void
1719 env_unexport(const unsigned char *var)
1720 {
1721 struct env_lst *ep;
1722
1723 if ((ep = env_find(var)))
1724 ep->export = 0;
1725 }
1726
1727 void
1728 env_send(unsigned char *var)
1729 {
1730 struct env_lst *ep;
1731
1732 if (my_state_is_wont(TELOPT_NEW_ENVIRON)
1733 #ifdef OLD_ENVIRON
1734 && my_state_is_wont(TELOPT_OLD_ENVIRON)
1735 #endif
1736 ) {
1737 fprintf(stderr,
1738 "Cannot send '%s': Telnet ENVIRON option not enabled\n",
1739 var);
1740 return;
1741 }
1742 ep = env_find(var);
1743 if (ep == NULL) {
1744 fprintf(stderr, "Cannot send '%s': variable not defined\n",
1745 var);
1746 return;
1747 }
1748 env_opt_start_info();
1749 env_opt_add(ep->var);
1750 env_opt_end(0);
1751 }
1752
1753 void
1754 env_list(void)
1755 {
1756 struct env_lst *ep;
1757
1758 for (ep = envlisthead.next; ep; ep = ep->next) {
1759 printf("%c %-20s %s\n", ep->export ? '*' : ' ',
1760 ep->var, ep->value);
1761 }
1762 }
1763
1764 unsigned char *
1765 env_default(int init, int welldefined)
1766 {
1767 static struct env_lst *nep = NULL;
1768
1769 if (init) {
1770 nep = &envlisthead;
1771 return(NULL);
1772 }
1773 if (nep) {
1774 while ((nep = nep->next)) {
1775 if (nep->export && (nep->welldefined == welldefined))
1776 return(nep->var);
1777 }
1778 }
1779 return(NULL);
1780 }
1781
1782 unsigned char *
1783 env_getvalue(const unsigned char *var)
1784 {
1785 struct env_lst *ep;
1786
1787 if ((ep = env_find(var)))
1788 return(ep->value);
1789 return(NULL);
1790 }
1791
1792 #if defined(OLD_ENVIRON) && defined(ENV_HACK)
1793 void
1794 env_varval(unsigned char *what)
1795 {
1796 extern int old_env_var, old_env_value, env_auto;
1797 int len = strlen((char *)what);
1798
1799 if (len == 0)
1800 goto unknown;
1801
1802 if (strncasecmp((char *)what, "status", len) == 0) {
1803 if (env_auto)
1804 printf("%s%s", "VAR and VALUE are/will be ",
1805 "determined automatically\n");
1806 if (old_env_var == OLD_ENV_VAR)
1807 printf("VAR and VALUE set to correct definitions\n");
1808 else
1809 printf("VAR and VALUE definitions are reversed\n");
1810 } else if (strncasecmp((char *)what, "auto", len) == 0) {
1811 env_auto = 1;
1812 old_env_var = OLD_ENV_VALUE;
1813 old_env_value = OLD_ENV_VAR;
1814 } else if (strncasecmp((char *)what, "right", len) == 0) {
1815 env_auto = 0;
1816 old_env_var = OLD_ENV_VAR;
1817 old_env_value = OLD_ENV_VALUE;
1818 } else if (strncasecmp((char *)what, "wrong", len) == 0) {
1819 env_auto = 0;
1820 old_env_var = OLD_ENV_VALUE;
1821 old_env_value = OLD_ENV_VAR;
1822 } else {
1823 unknown:
1824 printf("Unknown \"varval\" command. (\"auto\", \"right\", \"wrong\", \"status\")\n");
1825 }
1826 }
1827 #endif
1828
1829 #ifdef AUTHENTICATION
1830 /*
1831 * The AUTHENTICATE command.
1832 */
1833
1834 struct authlist {
1835 const char *name;
1836 const char *help;
1837 int (*handler)(char *);
1838 int narg;
1839 };
1840
1841 extern int
1842 auth_enable(char *),
1843 auth_disable(char *),
1844 auth_status(void);
1845 static int
1846 auth_help(void);
1847
1848 struct authlist AuthList[] = {
1849 { "status", "Display current status of authentication information",
1850 (int (*)(char *))auth_status, 0 },
1851 { "disable", "Disable an authentication type ('auth disable ?' for more)",
1852 auth_disable, 1 },
1853 { "enable", "Enable an authentication type ('auth enable ?' for more)",
1854 auth_enable, 1 },
1855 { "help", NULL, (int (*)(char *))auth_help, 0 },
1856 { "?", "Print help information", (int (*)(char *))auth_help, 0 },
1857 { NULL, NULL, NULL, 0 },
1858 };
1859
1860 static int
1861 auth_help(void)
1862 {
1863 struct authlist *c;
1864
1865 for (c = AuthList; c->name; c++) {
1866 if (c->help) {
1867 if (*c->help)
1868 printf("%-15s %s\n", c->name, c->help);
1869 else
1870 printf("\n");
1871 }
1872 }
1873 return 0;
1874 }
1875
1876 int
1877 auth_cmd(int argc, char *argv[])
1878 {
1879 struct authlist *c;
1880
1881 if (argc < 2) {
1882 fprintf(stderr,
1883 "Need an argument to 'auth' command. 'auth ?' for help.\n");
1884 return 0;
1885 }
1886
1887 c = (struct authlist *)
1888 genget(argv[1], (char **) AuthList, sizeof(struct authlist));
1889 if (c == NULL) {
1890 fprintf(stderr, "'%s': unknown argument ('auth ?' for help).\n",
1891 argv[1]);
1892 return 0;
1893 }
1894 if (Ambiguous((void *)c)) {
1895 fprintf(stderr, "'%s': ambiguous argument ('auth ?' for help).\n",
1896 argv[1]);
1897 return 0;
1898 }
1899 if (c->narg + 2 != argc) {
1900 fprintf(stderr,
1901 "Need %s%d argument%s to 'auth %s' command. 'auth ?' for help.\n",
1902 c->narg < argc + 2 ? "only " : "",
1903 c->narg, c->narg == 1 ? "" : "s", c->name);
1904 return 0;
1905 }
1906 return((*c->handler)(argv[2]));
1907 }
1908 #endif
1909
1910 #ifdef ENCRYPTION
1911 /*
1912 * The ENCRYPT command.
1913 */
1914
1915 struct encryptlist {
1916 const char *name;
1917 const char *help;
1918 int (*handler)(char *, char *);
1919 int needconnect;
1920 int minarg;
1921 int maxarg;
1922 };
1923
1924 extern int
1925 EncryptEnable(char *, char *),
1926 EncryptDisable(char *, char *),
1927 EncryptType(char *, char *),
1928 EncryptStart(char *),
1929 EncryptStartInput(void),
1930 EncryptStartOutput(void),
1931 EncryptStop(char *),
1932 EncryptStopInput(void),
1933 EncryptStopOutput(void),
1934 EncryptStatus(void);
1935 static int
1936 EncryptHelp(void);
1937
1938 struct encryptlist EncryptList[] = {
1939 { "enable", "Enable encryption. ('encrypt enable ?' for more)",
1940 EncryptEnable, 1, 1, 2 },
1941 { "disable", "Disable encryption. ('encrypt enable ?' for more)",
1942 EncryptDisable, 0, 1, 2 },
1943 { "type", "Set encryption type. ('encrypt type ?' for more)",
1944 EncryptType, 0, 1, 1 },
1945 { "start", "Start encryption. ('encrypt start ?' for more)",
1946 (int (*)(char *, char *))EncryptStart, 1, 0, 1 },
1947 { "stop", "Stop encryption. ('encrypt stop ?' for more)",
1948 (int (*)(char *, char *))EncryptStop, 1, 0, 1 },
1949 { "input", "Start encrypting the input stream",
1950 (int (*)(char *, char *))EncryptStartInput, 1, 0, 0 },
1951 { "-input", "Stop encrypting the input stream",
1952 (int (*)(char *, char *))EncryptStopInput, 1, 0, 0 },
1953 { "output", "Start encrypting the output stream",
1954 (int (*)(char *, char *))EncryptStartOutput, 1, 0, 0 },
1955 { "-output", "Stop encrypting the output stream",
1956 (int (*)(char *, char *))EncryptStopOutput, 1, 0, 0 },
1957
1958 { "status", "Display current status of authentication information",
1959 (int (*)(char *, char *))EncryptStatus, 0, 0, 0 },
1960 { "help", NULL, (int (*)(char *, char *))EncryptHelp, 0, 0, 0 },
1961 { "?", "Print help information", (int (*)(char *, char *))EncryptHelp, 0, 0, 0 },
1962 { NULL, NULL, NULL, 0, 0, 0 },
1963 };
1964
1965 static int
1966 EncryptHelp(void)
1967 {
1968 struct encryptlist *c;
1969
1970 for (c = EncryptList; c->name; c++) {
1971 if (c->help) {
1972 if (*c->help)
1973 printf("%-15s %s\n", c->name, c->help);
1974 else
1975 printf("\n");
1976 }
1977 }
1978 return 0;
1979 }
1980
1981 static int
1982 encrypt_cmd(int argc, char *argv[])
1983 {
1984 struct encryptlist *c;
1985
1986 if (argc < 2) {
1987 fprintf(stderr,
1988 "Need an argument to 'encrypt' command. 'encrypt ?' for help.\n");
1989 return 0;
1990 }
1991
1992 c = (struct encryptlist *)
1993 genget(argv[1], (char **) EncryptList, sizeof(struct encryptlist));
1994 if (c == NULL) {
1995 fprintf(stderr, "'%s': unknown argument ('encrypt ?' for help).\n",
1996 argv[1]);
1997 return 0;
1998 }
1999 if (Ambiguous((void *)c)) {
2000 fprintf(stderr, "'%s': ambiguous argument ('encrypt ?' for help).\n",
2001 argv[1]);
2002 return 0;
2003 }
2004 argc -= 2;
2005 if (argc < c->minarg || argc > c->maxarg) {
2006 if (c->minarg == c->maxarg) {
2007 fprintf(stderr, "Need %s%d argument%s ",
2008 c->minarg < argc ? "only " : "", c->minarg,
2009 c->minarg == 1 ? "" : "s");
2010 } else {
2011 fprintf(stderr, "Need %s%d-%d arguments ",
2012 c->maxarg < argc ? "only " : "", c->minarg, c->maxarg);
2013 }
2014 fprintf(stderr, "to 'encrypt %s' command. 'encrypt ?' for help.\n",
2015 c->name);
2016 return 0;
2017 }
2018 if (c->needconnect && !connected) {
2019 if (!(argc && (isprefix(argv[2], "help") || isprefix(argv[2], "?")))) {
2020 printf("?Need to be connected first.\n");
2021 return 0;
2022 }
2023 }
2024 return ((*c->handler)(argc > 0 ? argv[2] : 0,
2025 argc > 1 ? argv[3] : 0));
2026 }
2027 #endif /* ENCRYPTION */
2028
2029 /*
2030 * Print status about the connection.
2031 */
2032 /*ARGSUSED*/
2033 static int
2034 status(int argc, char *argv[])
2035 {
2036 if (connected) {
2037 printf("Connected to %s.\n", hostname);
2038 if ((argc < 2) || strcmp(argv[1], "notmuch")) {
2039 int mode = getconnmode();
2040
2041 if (my_want_state_is_will(TELOPT_LINEMODE)) {
2042 printf("Operating with LINEMODE option\n");
2043 printf("%s line editing\n", (mode&MODE_EDIT) ? "Local" : "No");
2044 printf("%s catching of signals\n",
2045 (mode&MODE_TRAPSIG) ? "Local" : "No");
2046 slcstate();
2047 #ifdef KLUDGELINEMODE
2048 } else if (kludgelinemode && my_want_state_is_dont(TELOPT_SGA)) {
2049 printf("Operating in obsolete linemode\n");
2050 #endif
2051 } else {
2052 printf("Operating in single character mode\n");
2053 if (localchars)
2054 printf("Catching signals locally\n");
2055 }
2056 printf("%s character echo\n", (mode&MODE_ECHO) ? "Local" : "Remote");
2057 if (my_want_state_is_will(TELOPT_LFLOW))
2058 printf("%s flow control\n", (mode&MODE_FLOW) ? "Local" : "No");
2059 #ifdef ENCRYPTION
2060 encrypt_display();
2061 #endif /* ENCRYPTION */
2062 }
2063 } else {
2064 printf("No connection.\n");
2065 }
2066 printf("Escape character is '%s'.\n", control(escape));
2067 (void) fflush(stdout);
2068 return 1;
2069 }
2070
2071 #ifdef SIGINFO
2072 /*
2073 * Function that gets called when SIGINFO is received.
2074 */
2075 void
2076 ayt_status(void)
2077 {
2078 (void) call(status, "status", "notmuch", 0);
2079 }
2080 #endif
2081
2082 static const char *
2083 sockaddr_ntop(struct sockaddr *sa)
2084 {
2085 void *addr;
2086 static char addrbuf[INET6_ADDRSTRLEN];
2087
2088 switch (sa->sa_family) {
2089 case AF_INET:
2090 addr = &((struct sockaddr_in *)sa)->sin_addr;
2091 break;
2092 case AF_UNIX:
2093 addr = &((struct sockaddr_un *)sa)->sun_path;
2094 break;
2095 #ifdef INET6
2096 case AF_INET6:
2097 addr = &((struct sockaddr_in6 *)sa)->sin6_addr;
2098 break;
2099 #endif
2100 default:
2101 return NULL;
2102 }
2103 inet_ntop(sa->sa_family, addr, addrbuf, sizeof(addrbuf));
2104 return addrbuf;
2105 }
2106
2107 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
2108 static int
2109 setpolicy(int lnet, struct addrinfo *res, char *policy)
2110 {
2111 char *buf;
2112 int level;
2113 int optname;
2114
2115 if (policy == NULL)
2116 return 0;
2117
2118 buf = ipsec_set_policy(policy, strlen(policy));
2119 if (buf == NULL) {
2120 printf("%s\n", ipsec_strerror());
2121 return -1;
2122 }
2123 level = res->ai_family == AF_INET ? IPPROTO_IP : IPPROTO_IPV6;
2124 optname = res->ai_family == AF_INET ? IP_IPSEC_POLICY : IPV6_IPSEC_POLICY;
2125 if (setsockopt(lnet, level, optname, buf, ipsec_get_policylen(buf)) < 0){
2126 perror("setsockopt");
2127 return -1;
2128 }
2129
2130 free(buf);
2131 return 0;
2132 }
2133 #endif
2134
2135 #ifdef INET6
2136 /*
2137 * When an Address Family related error happend, check if retry with
2138 * another AF is possible or not.
2139 * Return 1, if retry with another af is OK. Else, return 0.
2140 */
2141 static int
2142 switch_af(struct addrinfo **aip)
2143 {
2144 int nextaf;
2145 struct addrinfo *ai;
2146
2147 ai = *aip;
2148 nextaf = (ai->ai_family == AF_INET) ? AF_INET6 : AF_INET;
2149 do
2150 ai=ai->ai_next;
2151 while (ai != NULL && ai->ai_family != nextaf);
2152 *aip = ai;
2153 if (*aip != NULL) {
2154 return 1;
2155 }
2156 return 0;
2157 }
2158 #endif
2159
2160 int
2161 tn(int argc, char *argv[])
2162 {
2163 char *srp = NULL;
2164 int proto, opt;
2165 int srlen;
2166 int srcroute = 0, result;
2167 char *cmd, *hostp = NULL, *portp = NULL, *user = NULL;
2168 char *src_addr = NULL;
2169 struct addrinfo hints, *res, *res0 = NULL, *src_res, *src_res0 = NULL;
2170 int error = 0, af_error = 0;
2171
2172 if (connected) {
2173 printf("?Already connected to %s\n", hostname);
2174 setuid(getuid());
2175 return 0;
2176 }
2177 if (argc < 2) {
2178 (void) strcpy(line, "open ");
2179 printf("(to) ");
2180 (void) fgets(&line[strlen(line)], sizeof(line) - strlen(line), stdin);
2181 makeargv();
2182 argc = margc;
2183 argv = margv;
2184 }
2185 cmd = *argv;
2186 --argc; ++argv;
2187 while (argc) {
2188 if (strcmp(*argv, "help") == 0 || isprefix(*argv, "?"))
2189 goto usage;
2190 if (strcmp(*argv, "-l") == 0) {
2191 --argc; ++argv;
2192 if (argc == 0)
2193 goto usage;
2194 user = *argv++;
2195 --argc;
2196 continue;
2197 }
2198 if (strcmp(*argv, "-a") == 0) {
2199 --argc; ++argv;
2200 autologin = 1;
2201 continue;
2202 }
2203 if (strcmp(*argv, "-s") == 0) {
2204 --argc; ++argv;
2205 if (argc == 0)
2206 goto usage;
2207 src_addr = *argv++;
2208 --argc;
2209 continue;
2210 }
2211 if (hostp == NULL) {
2212 hostp = *argv++;
2213 --argc;
2214 continue;
2215 }
2216 if (portp == NULL) {
2217 portp = *argv++;
2218 --argc;
2219 continue;
2220 }
2221 usage:
2222 printf("usage: %s [-l user] [-a] [-s src_addr] host-name [port]\n", cmd);
2223 setuid(getuid());
2224 return 0;
2225 }
2226 if (hostp == NULL)
2227 goto usage;
2228
2229 if (src_addr != NULL) {
2230 memset(&hints, 0, sizeof(hints));
2231 hints.ai_flags = AI_NUMERICHOST;
2232 hints.ai_family = family;
2233 hints.ai_socktype = SOCK_STREAM;
2234 error = getaddrinfo(src_addr, 0, &hints, &src_res);
2235 if (error == EAI_NODATA) {
2236 hints.ai_flags = 0;
2237 error = getaddrinfo(src_addr, 0, &hints, &src_res);
2238 }
2239 if (error != 0) {
2240 fprintf(stderr, "%s: %s\n", src_addr, gai_strerror(error));
2241 if (error == EAI_SYSTEM)
2242 fprintf(stderr, "%s: %s\n", src_addr, strerror(errno));
2243 setuid(getuid());
2244 return 0;
2245 }
2246 src_res0 = src_res;
2247 }
2248 if (hostp[0] == '/') {
2249 struct sockaddr_un su;
2250
2251 if (strlen(hostp) >= sizeof(su.sun_path)) {
2252 fprintf(stderr, "hostname too long for unix domain socket: %s",
2253 hostp);
2254 goto fail;
2255 }
2256 memset(&su, 0, sizeof su);
2257 su.sun_family = AF_UNIX;
2258 strncpy(su.sun_path, hostp, sizeof su.sun_path);
2259 printf("Trying %s...\n", hostp);
2260 net = socket(PF_UNIX, SOCK_STREAM, 0);
2261 if ( net < 0) {
2262 perror("socket");
2263 goto fail;
2264 }
2265 if (connect(net, (struct sockaddr *)&su, sizeof su) == -1) {
2266 perror(su.sun_path);
2267 (void) NetClose(net);
2268 goto fail;
2269 }
2270 goto af_unix;
2271 } else if (hostp[0] == '@' || hostp[0] == '!') {
2272 if (
2273 #ifdef INET6
2274 family == AF_INET6 ||
2275 #endif
2276 (hostname = strrchr(hostp, ':')) == NULL)
2277 hostname = strrchr(hostp, '@');
2278 if (hostname == NULL) {
2279 hostname = hostp;
2280 } else {
2281 hostname++;
2282 srcroute = 1;
2283 }
2284 } else
2285 hostname = hostp;
2286 if (!portp) {
2287 telnetport = 1;
2288 portp = strdup("telnet");
2289 } else if (*portp == '-') {
2290 portp++;
2291 telnetport = 1;
2292 } else
2293 telnetport = 0;
2294
2295 memset(&hints, 0, sizeof(hints));
2296 hints.ai_flags = AI_NUMERICHOST;
2297 hints.ai_family = family;
2298 hints.ai_socktype = SOCK_STREAM;
2299 error = getaddrinfo(hostname, portp, &hints, &res);
2300 if (error) {
2301 hints.ai_flags = AI_CANONNAME;
2302 error = getaddrinfo(hostname, portp, &hints, &res);
2303 }
2304 if (error != 0) {
2305 fprintf(stderr, "%s: %s\n", hostname, gai_strerror(error));
2306 if (error == EAI_SYSTEM)
2307 fprintf(stderr, "%s: %s\n", hostname, strerror(errno));
2308 setuid(getuid());
2309 goto fail;
2310 }
2311 if (hints.ai_flags == AI_NUMERICHOST) {
2312 /* hostname has numeric */
2313 int gni_err = 1;
2314
2315 if (doaddrlookup)
2316 gni_err = getnameinfo(res->ai_addr, res->ai_addr->sa_len,
2317 _hostname, sizeof(_hostname) - 1, NULL, 0,
2318 NI_NAMEREQD);
2319 if (gni_err != 0)
2320 (void) strncpy(_hostname, hostp, sizeof(_hostname) - 1);
2321 _hostname[sizeof(_hostname)-1] = '\0';
2322 hostname = _hostname;
2323 } else {
2324 /* hostname has FQDN */
2325 if (srcroute != 0)
2326 (void) strncpy(_hostname, hostname, sizeof(_hostname) - 1);
2327 else if (res->ai_canonname != NULL)
2328 strcpy(_hostname, res->ai_canonname);
2329 else
2330 (void) strncpy(_hostname, hostp, sizeof(_hostname) - 1);
2331 _hostname[sizeof(_hostname)-1] = '\0';
2332 hostname = _hostname;
2333 }
2334 res0 = res;
2335 #ifdef INET6
2336 af_again:
2337 #endif
2338 if (srcroute != 0) {
2339 static char hostbuf[BUFSIZ];
2340
2341 if (af_error == 0) { /* save intermediate hostnames for retry */
2342 strncpy(hostbuf, hostp, BUFSIZ - 1);
2343 hostbuf[BUFSIZ - 1] = '\0';
2344 } else
2345 hostp = hostbuf;
2346 srp = NULL;
2347 result = sourceroute(res, hostp, &srp, &srlen, &proto, &opt);
2348 if (result == 0) {
2349 #ifdef INET6
2350 if (family == AF_UNSPEC && af_error == 0 &&
2351 switch_af(&res) == 1) {
2352 af_error = 1;
2353 goto af_again;
2354 }
2355 #endif
2356 setuid(getuid());
2357 goto fail;
2358 } else if (result == -1) {
2359 printf("Bad source route option: %s\n", hostp);
2360 setuid(getuid());
2361 goto fail;
2362 }
2363 }
2364 do {
2365 printf("Trying %s...\n", sockaddr_ntop(res->ai_addr));
2366 net = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
2367 setuid(getuid());
2368 if (net < 0) {
2369 #ifdef INET6
2370 if (family == AF_UNSPEC && af_error == 0 &&
2371 switch_af(&res) == 1) {
2372 af_error = 1;
2373 goto af_again;
2374 }
2375 #endif
2376 perror("telnet: socket");
2377 goto fail;
2378 }
2379 if (srp && setsockopt(net, proto, opt, (char *)srp, srlen) < 0)
2380 perror("setsockopt (source route)");
2381 #if defined(IPPROTO_IP) && defined(IP_TOS)
2382 if (res->ai_family == PF_INET) {
2383 # if defined(HAS_GETTOS)
2384 struct tosent *tp;
2385 if (tos < 0 && (tp = gettosbyname("telnet", "tcp")))
2386 tos = tp->t_tos;
2387 # endif
2388 if (tos < 0)
2389 tos = IPTOS_LOWDELAY;
2390 if (tos
2391 && (setsockopt(net, IPPROTO_IP, IP_TOS,
2392 (char *)&tos, sizeof(int)) < 0)
2393 && (errno != ENOPROTOOPT))
2394 perror("telnet: setsockopt (IP_TOS) (ignored)");
2395 }
2396 #endif /* defined(IPPROTO_IP) && defined(IP_TOS) */
2397
2398 if (debug && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 1) < 0) {
2399 perror("setsockopt (SO_DEBUG)");
2400 }
2401
2402 if (src_addr != NULL) {
2403 for (src_res = src_res0; src_res != NULL; src_res = src_res->ai_next)
2404 if (src_res->ai_family == res->ai_family)
2405 break;
2406 if (src_res == NULL)
2407 src_res = src_res0;
2408 if (bind(net, src_res->ai_addr, src_res->ai_addrlen) == -1) {
2409 #ifdef INET6
2410 if (family == AF_UNSPEC && af_error == 0 &&
2411 switch_af(&res) == 1) {
2412 af_error = 1;
2413 (void) NetClose(net);
2414 goto af_again;
2415 }
2416 #endif
2417 perror("bind");
2418 (void) NetClose(net);
2419 goto fail;
2420 }
2421 }
2422 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
2423 if (setpolicy(net, res, ipsec_policy_in) < 0) {
2424 (void) NetClose(net);
2425 goto fail;
2426 }
2427 if (setpolicy(net, res, ipsec_policy_out) < 0) {
2428 (void) NetClose(net);
2429 goto fail;
2430 }
2431 #endif
2432
2433 if (connect(net, res->ai_addr, res->ai_addrlen) < 0) {
2434 struct addrinfo *next;
2435
2436 next = res->ai_next;
2437 /* If already an af failed, only try same af. */
2438 if (af_error != 0)
2439 while (next != NULL && next->ai_family != res->ai_family)
2440 next = next->ai_next;
2441 warn("connect to address %s", sockaddr_ntop(res->ai_addr));
2442 if (next != NULL) {
2443 res = next;
2444 (void) NetClose(net);
2445 continue;
2446 }
2447 warnx("Unable to connect to remote host");
2448 (void) NetClose(net);
2449 goto fail;
2450 }
2451 connected++;
2452 #ifdef AUTHENTICATION
2453 #ifdef ENCRYPTION
2454 auth_encrypt_connect(connected);
2455 #endif
2456 #endif
2457 } while (connected == 0);
2458 freeaddrinfo(res0);
2459 if (src_res0 != NULL)
2460 freeaddrinfo(src_res0);
2461 cmdrc(hostp, hostname);
2462 af_unix:
2463 if (autologin && user == NULL) {
2464 struct passwd *pw;
2465
2466 user = getenv("USER");
2467 if (user == NULL ||
2468 ((pw = getpwnam(user)) && pw->pw_uid != getuid())) {
2469 if ((pw = getpwuid(getuid())))
2470 user = pw->pw_name;
2471 else
2472 user = NULL;
2473 }
2474 }
2475 if (user) {
2476 env_define("USER", user);
2477 env_export("USER");
2478 }
2479 (void) call(status, "status", "notmuch", 0);
2480 if (setjmp(peerdied) == 0)
2481 telnet(user);
2482 (void) NetClose(net);
2483 ExitString("Connection closed by foreign host.\n",1);
2484 /*NOTREACHED*/
2485 fail:
2486 if (res0 != NULL)
2487 freeaddrinfo(res0);
2488 if (src_res0 != NULL)
2489 freeaddrinfo(src_res0);
2490 return 0;
2491 }
2492
2493 #define HELPINDENT (sizeof ("connect"))
2494
2495 static char
2496 openhelp[] = "connect to a site",
2497 closehelp[] = "close current connection",
2498 logouthelp[] = "forcibly logout remote user and close the connection",
2499 quithelp[] = "exit telnet",
2500 statushelp[] = "print status information",
2501 helphelp[] = "print help information",
2502 sendhelp[] = "transmit special characters ('send ?' for more)",
2503 sethelp[] = "set operating parameters ('set ?' for more)",
2504 unsethelp[] = "unset operating parameters ('unset ?' for more)",
2505 togglestring[] ="toggle operating parameters ('toggle ?' for more)",
2506 slchelp[] = "change state of special characters ('slc ?' for more)",
2507 displayhelp[] = "display operating parameters",
2508 #ifdef AUTHENTICATION
2509 authhelp[] = "turn on (off) authentication ('auth ?' for more)",
2510 #endif
2511 #ifdef ENCRYPTION
2512 encrypthelp[] = "turn on (off) encryption ('encrypt ?' for more)",
2513 #endif /* ENCRYPTION */
2514 zhelp[] = "suspend telnet",
2515 #ifdef OPIE
2516 opiehelp[] = "compute response to OPIE challenge",
2517 #endif
2518 shellhelp[] = "invoke a subshell",
2519 envhelp[] = "change environment variables ('environ ?' for more)",
2520 modestring[] = "try to enter line or character mode ('mode ?' for more)";
2521
2522 static Command cmdtab[] = {
2523 { "close", closehelp, bye, 1 },
2524 { "logout", logouthelp, (int (*)(int, char **))logout, 1 },
2525 { "display", displayhelp, display, 0 },
2526 { "mode", modestring, modecmd, 0 },
2527 { "telnet", openhelp, tn, 0 },
2528 { "open", openhelp, tn, 0 },
2529 { "quit", quithelp, (int (*)(int, char **))quit, 0 },
2530 { "send", sendhelp, sendcmd, 0 },
2531 { "set", sethelp, setcmd, 0 },
2532 { "unset", unsethelp, unsetcmd, 0 },
2533 { "status", statushelp, status, 0 },
2534 { "toggle", togglestring, toggle, 0 },
2535 { "slc", slchelp, slccmd, 0 },
2536 #ifdef AUTHENTICATION
2537 { "auth", authhelp, auth_cmd, 0 },
2538 #endif
2539 #ifdef ENCRYPTION
2540 { "encrypt", encrypthelp, encrypt_cmd, 0 },
2541 #endif /* ENCRYPTION */
2542 { "z", zhelp, (int (*)(int, char **))suspend, 0 },
2543 { "!", shellhelp, shell, 1 },
2544 { "environ", envhelp, env_cmd, 0 },
2545 { "?", helphelp, help, 0 },
2546 #ifdef OPIE
2547 { "opie", opiehelp, opie_calc, 0 },
2548 #endif
2549 { NULL, NULL, NULL, 0 }
2550 };
2551
2552 static char crmodhelp[] = "deprecated command -- use 'toggle crmod' instead";
2553 static char escapehelp[] = "deprecated command -- use 'set escape' instead";
2554
2555 static Command cmdtab2[] = {
2556 { "help", 0, help, 0 },
2557 { "escape", escapehelp, setescape, 0 },
2558 { "crmod", crmodhelp, (int (*)(int, char **))togcrmod, 0 },
2559 { NULL, NULL, NULL, 0 }
2560 };
2561
2562
2563 /*
2564 * Call routine with argc, argv set from args (terminated by 0).
2565 */
2566
2567 static int
2568 call(intrtn_t routine, ...)
2569 {
2570 va_list ap;
2571 char *args[100];
2572 int argno = 0;
2573
2574 va_start(ap, routine);
2575 while ((args[argno++] = va_arg(ap, char *)) != NULL);
2576 va_end(ap);
2577 return (*routine)(argno-1, args);
2578 }
2579
2580
2581 static Command *
2582 getcmd(char *name)
2583 {
2584 Command *cm;
2585
2586 if ((cm = (Command *) genget(name, (char **) cmdtab, sizeof(Command))))
2587 return cm;
2588 return (Command *) genget(name, (char **) cmdtab2, sizeof(Command));
2589 }
2590
2591 void
2592 command(int top, const char *tbuf, int cnt)
2593 {
2594 Command *c;
2595
2596 setcommandmode();
2597 if (!top) {
2598 putchar('\n');
2599 } else {
2600 (void) signal(SIGINT, SIG_DFL);
2601 (void) signal(SIGQUIT, SIG_DFL);
2602 }
2603 for (;;) {
2604 if (rlogin == _POSIX_VDISABLE)
2605 printf("%s> ", prompt);
2606 if (tbuf) {
2607 char *cp;
2608 cp = line;
2609 while (cnt > 0 && (*cp++ = *tbuf++) != '\n')
2610 cnt--;
2611 tbuf = NULL;
2612 if (cp == line || *--cp != '\n' || cp == line)
2613 goto getline;
2614 *cp = '\0';
2615 if (rlogin == _POSIX_VDISABLE)
2616 printf("%s\n", line);
2617 } else {
2618 getline:
2619 if (rlogin != _POSIX_VDISABLE)
2620 printf("%s> ", prompt);
2621 if (fgets(line, sizeof(line), stdin) == NULL) {
2622 if (feof(stdin) || ferror(stdin)) {
2623 (void) quit();
2624 /*NOTREACHED*/
2625 }
2626 break;
2627 }
2628 }
2629 if (line[0] == 0)
2630 break;
2631 makeargv();
2632 if (margv[0] == NULL) {
2633 break;
2634 }
2635 c = getcmd(margv[0]);
2636 if (Ambiguous((void *)c)) {
2637 printf("?Ambiguous command\n");
2638 continue;
2639 }
2640 if (c == NULL) {
2641 printf("?Invalid command\n");
2642 continue;
2643 }
2644 if (c->needconnect && !connected) {
2645 printf("?Need to be connected first.\n");
2646 continue;
2647 }
2648 if ((*c->handler)(margc, margv)) {
2649 break;
2650 }
2651 }
2652 if (!top) {
2653 if (!connected) {
2654 longjmp(toplevel, 1);
2655 /*NOTREACHED*/
2656 }
2657 setconnmode(0);
2658 }
2659 }
2660 \f
2661 /*
2662 * Help command.
2663 */
2664 static int
2665 help(int argc, char *argv[])
2666 {
2667 Command *c;
2668
2669 if (argc == 1) {
2670 printf("Commands may be abbreviated. Commands are:\n\n");
2671 for (c = cmdtab; c->name; c++)
2672 if (c->help) {
2673 printf("%-*s\t%s\n", (int)HELPINDENT, c->name,
2674 c->help);
2675 }
2676 return 0;
2677 }
2678 else while (--argc > 0) {
2679 char *arg;
2680 arg = *++argv;
2681 c = getcmd(arg);
2682 if (Ambiguous((void *)c))
2683 printf("?Ambiguous help command %s\n", arg);
2684 else if (c == NULL)
2685 printf("?Invalid help command %s\n", arg);
2686 else
2687 printf("%s\n", c->help);
2688 }
2689 return 0;
2690 }
2691
2692 static char *rcname = NULL;
2693 static char rcbuf[128];
2694
2695 void
2696 cmdrc(char *m1, char *m2)
2697 {
2698 Command *c;
2699 FILE *rcfile;
2700 int gotmachine = 0;
2701 int l1 = strlen(m1);
2702 int l2 = strlen(m2);
2703 char m1save[MAXHOSTNAMELEN];
2704
2705 if (skiprc)
2706 return;
2707
2708 strlcpy(m1save, m1, sizeof(m1save));
2709 m1 = m1save;
2710
2711 if (rcname == NULL) {
2712 rcname = getenv("HOME");
2713 if (rcname && (strlen(rcname) + 10) < sizeof(rcbuf))
2714 strcpy(rcbuf, rcname);
2715 else
2716 rcbuf[0] = '\0';
2717 strcat(rcbuf, "/.telnetrc");
2718 rcname = rcbuf;
2719 }
2720
2721 if ((rcfile = fopen(rcname, "r")) == NULL) {
2722 return;
2723 }
2724
2725 for (;;) {
2726 if (fgets(line, sizeof(line), rcfile) == NULL)
2727 break;
2728 if (line[0] == 0)
2729 break;
2730 if (line[0] == '#')
2731 continue;
2732 if (gotmachine) {
2733 if (!isspace(line[0]))
2734 gotmachine = 0;
2735 }
2736 if (gotmachine == 0) {
2737 if (isspace(line[0]))
2738 continue;
2739 if (strncasecmp(line, m1, l1) == 0)
2740 strncpy(line, &line[l1], sizeof(line) - l1);
2741 else if (strncasecmp(line, m2, l2) == 0)
2742 strncpy(line, &line[l2], sizeof(line) - l2);
2743 else if (strncasecmp(line, "DEFAULT", 7) == 0)
2744 strncpy(line, &line[7], sizeof(line) - 7);
2745 else
2746 continue;
2747 if (line[0] != ' ' && line[0] != '\t' && line[0] != '\n')
2748 continue;
2749 gotmachine = 1;
2750 }
2751 makeargv();
2752 if (margv[0] == NULL)
2753 continue;
2754 c = getcmd(margv[0]);
2755 if (Ambiguous((void *)c)) {
2756 printf("?Ambiguous command: %s\n", margv[0]);
2757 continue;
2758 }
2759 if (c == NULL) {
2760 printf("?Invalid command: %s\n", margv[0]);
2761 continue;
2762 }
2763 /*
2764 * This should never happen...
2765 */
2766 if (c->needconnect && !connected) {
2767 printf("?Need to be connected first for %s.\n", margv[0]);
2768 continue;
2769 }
2770 (*c->handler)(margc, margv);
2771 }
2772 fclose(rcfile);
2773 }
2774
2775 /*
2776 * Source route is handed in as
2777 * [!]@hop1@hop2...[@|:]dst
2778 * If the leading ! is present, it is a
2779 * strict source route, otherwise it is
2780 * assmed to be a loose source route.
2781 *
2782 * We fill in the source route option as
2783 * hop1,hop2,hop3...dest
2784 * and return a pointer to hop1, which will
2785 * be the address to connect() to.
2786 *
2787 * Arguments:
2788 *
2789 * res: ponter to addrinfo structure which contains sockaddr to
2790 * the host to connect to.
2791 *
2792 * arg: pointer to route list to decipher
2793 *
2794 * cpp: If *cpp is not equal to NULL, this is a
2795 * pointer to a pointer to a character array
2796 * that should be filled in with the option.
2797 *
2798 * lenp: pointer to an integer that contains the
2799 * length of *cpp if *cpp != NULL.
2800 *
2801 * protop: pointer to an integer that should be filled in with
2802 * appropriate protocol for setsockopt, as socket
2803 * protocol family.
2804 *
2805 * optp: pointer to an integer that should be filled in with
2806 * appropriate option for setsockopt, as socket protocol
2807 * family.
2808 *
2809 * Return values:
2810 *
2811 * If the return value is 1, then all operations are
2812 * successful. If the
2813 * return value is -1, there was a syntax error in the
2814 * option, either unknown characters, or too many hosts.
2815 * If the return value is 0, one of the hostnames in the
2816 * path is unknown, and *cpp is set to point to the bad
2817 * hostname.
2818 *
2819 * *cpp: If *cpp was equal to NULL, it will be filled
2820 * in with a pointer to our static area that has
2821 * the option filled in. This will be 32bit aligned.
2822 *
2823 * *lenp: This will be filled in with how long the option
2824 * pointed to by *cpp is.
2825 *
2826 * *protop: This will be filled in with appropriate protocol for
2827 * setsockopt, as socket protocol family.
2828 *
2829 * *optp: This will be filled in with appropriate option for
2830 * setsockopt, as socket protocol family.
2831 */
2832 static int
2833 sourceroute(struct addrinfo *ai, char *arg, char **cpp, int *lenp, int *protop, int *optp)
2834 {
2835 static char buf[1024 + ALIGNBYTES]; /*XXX*/
2836 char *cp, *cp2, *lsrp, *ep;
2837 struct sockaddr_in *_sin;
2838 #ifdef INET6
2839 #ifdef COMPAT_RFC1883 /* XXX */
2840 struct cmsghdr *cmsg;
2841 #endif
2842 #endif
2843 struct addrinfo hints, *res;
2844 int error;
2845 char c;
2846
2847 /*
2848 * Verify the arguments, and make sure we have
2849 * at least 7 bytes for the option.
2850 */
2851 if (cpp == NULL || lenp == NULL)
2852 return -1;
2853 if (*cpp != NULL) {
2854 switch (res->ai_family) {
2855 case AF_INET:
2856 if (*lenp < 7)
2857 return -1;
2858 break;
2859 #ifdef INET6
2860 case AF_INET6:
2861 if (*lenp < (int)CMSG_SPACE(sizeof(struct ip6_rthdr) +
2862 sizeof(struct in6_addr)))
2863 return -1;
2864 break;
2865 #endif
2866 }
2867 }
2868 /*
2869 * Decide whether we have a buffer passed to us,
2870 * or if we need to use our own static buffer.
2871 */
2872 if (*cpp) {
2873 lsrp = *cpp;
2874 ep = lsrp + *lenp;
2875 } else {
2876 *cpp = lsrp = (char *)ALIGN(buf);
2877 ep = lsrp + 1024;
2878 }
2879
2880 cp = arg;
2881
2882 #ifdef INET6
2883 if (ai->ai_family == AF_INET6) {
2884 /*
2885 * RFC3542 has obsoleted IPV6_PKTOPTIONS socket option.
2886 */
2887 #ifdef COMPAT_RFC1883 /* XXX */
2888 cmsg = NULL;
2889 if (*cp != '@')
2890 return -1;
2891 *protop = IPPROTO_IPV6;
2892 *optp = IPV6_PKTOPTIONS;
2893 #else
2894 return -1;
2895 #endif /* COMPAT_RFC1883 */
2896 } else
2897 #endif
2898 {
2899 /*
2900 * Next, decide whether we have a loose source
2901 * route or a strict source route, and fill in
2902 * the begining of the option.
2903 */
2904 if (*cp == '!') {
2905 cp++;
2906 *lsrp++ = IPOPT_SSRR;
2907 } else
2908 *lsrp++ = IPOPT_LSRR;
2909
2910 if (*cp != '@')
2911 return -1;
2912
2913 lsrp++; /* skip over length, we'll fill it in later */
2914 *lsrp++ = 4;
2915 *protop = IPPROTO_IP;
2916 *optp = IP_OPTIONS;
2917 }
2918
2919 cp++;
2920 memset(&hints, 0, sizeof(hints));
2921 hints.ai_family = ai->ai_family;
2922 hints.ai_socktype = SOCK_STREAM;
2923 for (c = 0;;) {
2924 if (
2925 #ifdef INET6
2926 ai->ai_family != AF_INET6 &&
2927 #endif
2928 c == ':')
2929 cp2 = NULL;
2930 else for (cp2 = cp; (c = *cp2); cp2++) {
2931 if (c == ',') {
2932 *cp2++ = '\0';
2933 if (*cp2 == '@')
2934 cp2++;
2935 } else if (c == '@') {
2936 *cp2++ = '\0';
2937 } else if (
2938 #ifdef INET6
2939 ai->ai_family != AF_INET6 &&
2940 #endif
2941 c == ':') {
2942 *cp2++ = '\0';
2943 } else
2944 continue;
2945 break;
2946 }
2947 if (!c)
2948 cp2 = NULL;
2949
2950 hints.ai_flags = AI_NUMERICHOST;
2951 error = getaddrinfo(cp, NULL, &hints, &res);
2952 if (error == EAI_NODATA) {
2953 hints.ai_flags = 0;
2954 error = getaddrinfo(cp, NULL, &hints, &res);
2955 }
2956 if (error != 0) {
2957 fprintf(stderr, "%s: %s\n", cp, gai_strerror(error));
2958 if (error == EAI_SYSTEM)
2959 fprintf(stderr, "%s: %s\n", cp,
2960 strerror(errno));
2961 *cpp = cp;
2962 return(0);
2963 }
2964 #ifdef INET6
2965 if (res->ai_family == AF_INET6) {
2966 return(0);
2967 } else
2968 #endif
2969 {
2970 _sin = (struct sockaddr_in *)res->ai_addr;
2971 memcpy(lsrp, (char *)&_sin->sin_addr, 4);
2972 lsrp += 4;
2973 }
2974 if (cp2)
2975 cp = cp2;
2976 else
2977 break;
2978 /*
2979 * Check to make sure there is space for next address
2980 */
2981 #ifdef INET6
2982 #ifdef COMPAT_RFC1883 /* XXX */
2983 if (res->ai_family == AF_INET6) {
2984 if (((char *)CMSG_DATA(cmsg) +
2985 sizeof(struct ip6_rthdr)) > ep)
2986 return -1;
2987 } else
2988 #endif /* COMPAT_RFC1883 */
2989 #endif
2990 if (lsrp + 4 > ep)
2991 return -1;
2992 freeaddrinfo(res);
2993 }
2994 #ifdef INET6
2995 if (res->ai_family == AF_INET6) {
2996 #ifdef COMPAT_RFC1883 /* XXX */
2997 *lenp = 0;
2998 #endif /* COMPAT_RFC1883 */
2999 } else
3000 #endif
3001 {
3002 if ((*(*cpp+IPOPT_OLEN) = lsrp - *cpp) <= 7) {
3003 *cpp = NULL;
3004 *lenp = 0;
3005 return -1;
3006 }
3007 *lsrp++ = IPOPT_NOP; /* 32 bit word align it */
3008 *lenp = lsrp - *cpp;
3009 }
3010 freeaddrinfo(res);
3011 return 1;
3012 }
DragonFly BSD