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Stop building multiple versions of telnet.
[dragonfly.git] / usr.bin / telnet / commands.c
blobac5f6cc33e4b3431e3077aab08b79d0aa22b8d62
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
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(char *name)
425 {
426 return(send_tncmd(send_dont, "dont", name));
427 }
428
429 static int
430 send_willcmd(char *name)
431 {
432 return(send_tncmd(send_will, "will", name));
433 }
434
435 static int
436 send_wontcmd(char *name)
437 {
438 return(send_tncmd(send_wont, "wont", name));
439 }
440
441 static int
442 send_tncmd(void (*func)(int, int), const char *cmd, char *name)
443 {
444 char **cpp;
445 extern char *telopts[];
446 int val = 0;
447
448 if (isprefix(name, "help") || isprefix(name, "?")) {
449 int col, len;
450
451 printf("Usage: send %s <value|option>\n", cmd);
452 printf("\"value\" must be from 0 to 255\n");
453 printf("Valid options are:\n\t");
454
455 col = 8;
456 for (cpp = telopts; *cpp; cpp++) {
457 len = strlen(*cpp) + 3;
458 if (col + len > 65) {
459 printf("\n\t");
460 col = 8;
461 }
462 printf(" \"%s\"", *cpp);
463 col += len;
464 }
465 printf("\n");
466 return 0;
467 }
468 cpp = (char **)genget(name, telopts, sizeof(char *));
469 if (Ambiguous(cpp)) {
470 fprintf(stderr,"'%s': ambiguous argument ('send %s ?' for help).\n",
471 name, cmd);
472 return 0;
473 }
474 if (cpp) {
475 val = cpp - telopts;
476 } else {
477 char *cp = name;
478
479 while (*cp >= '0' && *cp <= '9') {
480 val *= 10;
481 val += *cp - '0';
482 cp++;
483 }
484 if (*cp != 0) {
485 fprintf(stderr, "'%s': unknown argument ('send %s ?' for help).\n",
486 name, cmd);
487 return 0;
488 } else if (val < 0 || val > 255) {
489 fprintf(stderr, "'%s': bad value ('send %s ?' for help).\n",
490 name, cmd);
491 return 0;
492 }
493 }
494 if (!connected) {
495 printf("?Need to be connected first.\n");
496 return 0;
497 }
498 (*func)(val, 1);
499 return 1;
500 }
501
502 static int
503 send_help(void)
504 {
505 struct sendlist *s; /* pointer to current command */
506 for (s = Sendlist; s->name; s++) {
507 if (s->help)
508 printf("%-15s %s\n", s->name, s->help);
509 }
510 return(0);
511 }
512 \f
513 /*
514 * The following are the routines and data structures referred
515 * to by the arguments to the "toggle" command.
516 */
517
518 static int
519 lclchars(void)
520 {
521 donelclchars = 1;
522 return 1;
523 }
524
525 static int
526 togdebug(void)
527 {
528 #ifndef NOT43
529 if (net > 0 &&
530 (SetSockOpt(net, SOL_SOCKET, SO_DEBUG, debug)) < 0) {
531 perror("setsockopt (SO_DEBUG)");
532 }
533 #else /* NOT43 */
534 if (debug) {
535 if (net > 0 && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 1) < 0)
536 perror("setsockopt (SO_DEBUG)");
537 } else
538 printf("Cannot turn off socket debugging\n");
539 #endif /* NOT43 */
540 return 1;
541 }
542
543
544 static int
545 togcrlf(void)
546 {
547 if (crlf) {
548 printf("Will send carriage returns as telnet <CR><LF>.\n");
549 } else {
550 printf("Will send carriage returns as telnet <CR><NUL>.\n");
551 }
552 return 1;
553 }
554
555 int binmode;
556
557 static int
558 togbinary(int val)
559 {
560 donebinarytoggle = 1;
561
562 if (val >= 0) {
563 binmode = val;
564 } else {
565 if (my_want_state_is_will(TELOPT_BINARY) &&
566 my_want_state_is_do(TELOPT_BINARY)) {
567 binmode = 1;
568 } else if (my_want_state_is_wont(TELOPT_BINARY) &&
569 my_want_state_is_dont(TELOPT_BINARY)) {
570 binmode = 0;
571 }
572 val = binmode ? 0 : 1;
573 }
574
575 if (val == 1) {
576 if (my_want_state_is_will(TELOPT_BINARY) &&
577 my_want_state_is_do(TELOPT_BINARY)) {
578 printf("Already operating in binary mode with remote host.\n");
579 } else {
580 printf("Negotiating binary mode with remote host.\n");
581 tel_enter_binary(3);
582 }
583 } else {
584 if (my_want_state_is_wont(TELOPT_BINARY) &&
585 my_want_state_is_dont(TELOPT_BINARY)) {
586 printf("Already in network ascii mode with remote host.\n");
587 } else {
588 printf("Negotiating network ascii mode with remote host.\n");
589 tel_leave_binary(3);
590 }
591 }
592 return 1;
593 }
594
595 static int
596 togrbinary(int val)
597 {
598 donebinarytoggle = 1;
599
600 if (val == -1)
601 val = my_want_state_is_do(TELOPT_BINARY) ? 0 : 1;
602
603 if (val == 1) {
604 if (my_want_state_is_do(TELOPT_BINARY)) {
605 printf("Already receiving in binary mode.\n");
606 } else {
607 printf("Negotiating binary mode on input.\n");
608 tel_enter_binary(1);
609 }
610 } else {
611 if (my_want_state_is_dont(TELOPT_BINARY)) {
612 printf("Already receiving in network ascii mode.\n");
613 } else {
614 printf("Negotiating network ascii mode on input.\n");
615 tel_leave_binary(1);
616 }
617 }
618 return 1;
619 }
620
621 static int
622 togxbinary(int val)
623 {
624 donebinarytoggle = 1;
625
626 if (val == -1)
627 val = my_want_state_is_will(TELOPT_BINARY) ? 0 : 1;
628
629 if (val == 1) {
630 if (my_want_state_is_will(TELOPT_BINARY)) {
631 printf("Already transmitting in binary mode.\n");
632 } else {
633 printf("Negotiating binary mode on output.\n");
634 tel_enter_binary(2);
635 }
636 } else {
637 if (my_want_state_is_wont(TELOPT_BINARY)) {
638 printf("Already transmitting in network ascii mode.\n");
639 } else {
640 printf("Negotiating network ascii mode on output.\n");
641 tel_leave_binary(2);
642 }
643 }
644 return 1;
645 }
646
647 struct togglelist {
648 const char *name; /* name of toggle */
649 const char *help; /* help message */
650 int (*handler)(int); /* routine to do actual setting */
651 int *variable;
652 const char *actionexplanation;
653 };
654
655 static struct togglelist Togglelist[] = {
656 { "autoflush",
657 "flushing of output when sending interrupt characters",
658 0,
659 &autoflush,
660 "flush output when sending interrupt characters" },
661 { "autosynch",
662 "automatic sending of interrupt characters in urgent mode",
663 0,
664 &autosynch,
665 "send interrupt characters in urgent mode" },
666 #ifdef AUTHENTICATION
667 { "autologin",
668 "automatic sending of login and/or authentication info",
669 0,
670 &autologin,
671 "send login name and/or authentication information" },
672 { "authdebug",
673 "Toggle authentication debugging",
674 auth_togdebug,
675 0,
676 "print authentication debugging information" },
677 #endif
678 #ifdef ENCRYPTION
679 { "autoencrypt",
680 "automatic encryption of data stream",
681 EncryptAutoEnc,
682 0,
683 "automatically encrypt output" },
684 { "autodecrypt",
685 "automatic decryption of data stream",
686 EncryptAutoDec,
687 0,
688 "automatically decrypt input" },
689 { "verbose_encrypt",
690 "Toggle verbose encryption output",
691 EncryptVerbose,
692 0,
693 "print verbose encryption output" },
694 { "encdebug",
695 "Toggle encryption debugging",
696 EncryptDebug,
697 0,
698 "print encryption debugging information" },
699 #endif /* ENCRYPTION */
700 { "skiprc",
701 "don't read ~/.telnetrc file",
702 0,
703 &skiprc,
704 "skip reading of ~/.telnetrc file" },
705 { "binary",
706 "sending and receiving of binary data",
707 togbinary,
708 0,
709 0 },
710 { "inbinary",
711 "receiving of binary data",
712 togrbinary,
713 0,
714 0 },
715 { "outbinary",
716 "sending of binary data",
717 togxbinary,
718 0,
719 0 },
720 { "crlf",
721 "sending carriage returns as telnet <CR><LF>",
722 (int (*)(int))togcrlf,
723 &crlf,
724 0 },
725 { "crmod",
726 "mapping of received carriage returns",
727 0,
728 &crmod,
729 "map carriage return on output" },
730 { "localchars",
731 "local recognition of certain control characters",
732 (int (*)(int))lclchars,
733 &localchars,
734 "recognize certain control characters" },
735 { " ", "", NULL, NULL, NULL }, /* empty line */
736 { "debug",
737 "debugging",
738 (int (*)(int))togdebug,
739 &debug,
740 "turn on socket level debugging" },
741 { "netdata",
742 "printing of hexadecimal network data (debugging)",
743 0,
744 &netdata,
745 "print hexadecimal representation of network traffic" },
746 { "prettydump",
747 "output of \"netdata\" to user readable format (debugging)",
748 0,
749 &prettydump,
750 "print user readable output for \"netdata\"" },
751 { "options",
752 "viewing of options processing (debugging)",
753 0,
754 &showoptions,
755 "show option processing" },
756 { "termdata",
757 "(debugging) toggle printing of hexadecimal terminal data",
758 0,
759 &termdata,
760 "print hexadecimal representation of terminal traffic" },
761 { "?",
762 NULL,
763 (int (*)(int))togglehelp,
764 NULL,
765 NULL },
766 { NULL, NULL, NULL, NULL, NULL },
767 { "help",
768 NULL,
769 (int (*)(int))togglehelp,
770 NULL,
771 NULL },
772 { NULL, NULL, NULL, NULL, NULL }
773 };
774
775 static int
776 togglehelp(void)
777 {
778 struct togglelist *c;
779
780 for (c = Togglelist; c->name; c++) {
781 if (c->help) {
782 if (*c->help)
783 printf("%-15s toggle %s\n", c->name, c->help);
784 else
785 printf("\n");
786 }
787 }
788 printf("\n");
789 printf("%-15s %s\n", "?", "display help information");
790 return 0;
791 }
792
793 static void
794 settogglehelp(int set)
795 {
796 struct togglelist *c;
797
798 for (c = Togglelist; c->name; c++) {
799 if (c->help) {
800 if (*c->help)
801 printf("%-15s %s %s\n", c->name, set ? "enable" : "disable",
802 c->help);
803 else
804 printf("\n");
805 }
806 }
807 }
808
809 #define GETTOGGLE(name) (struct togglelist *) \
810 genget(name, (char **) Togglelist, sizeof(struct togglelist))
811
812 static int
813 toggle(int argc, char *argv[])
814 {
815 int retval = 1;
816 char *name;
817 struct togglelist *c;
818
819 if (argc < 2) {
820 fprintf(stderr,
821 "Need an argument to 'toggle' command. 'toggle ?' for help.\n");
822 return 0;
823 }
824 argc--;
825 argv++;
826 while (argc--) {
827 name = *argv++;
828 c = GETTOGGLE(name);
829 if (Ambiguous((void *)c)) {
830 fprintf(stderr, "'%s': ambiguous argument ('toggle ?' for help).\n",
831 name);
832 return 0;
833 } else if (c == 0) {
834 fprintf(stderr, "'%s': unknown argument ('toggle ?' for help).\n",
835 name);
836 return 0;
837 } else {
838 if (c->variable) {
839 *c->variable = !*c->variable; /* invert it */
840 if (c->actionexplanation) {
841 printf("%s %s.\n", *c->variable? "Will" : "Won't",
842 c->actionexplanation);
843 }
844 }
845 if (c->handler) {
846 retval &= (*c->handler)(-1);
847 }
848 }
849 }
850 return retval;
851 }
852 \f
853 /*
854 * The following perform the "set" command.
855 */
856
857 #ifdef USE_TERMIO
858 struct termio new_tc = { 0, 0, 0, 0, {}, 0, 0 };
859 #endif
860
861 struct setlist {
862 const char *name; /* name */
863 const char *help; /* help information */
864 void (*handler)(char *);
865 cc_t *charp; /* where it is located at */
866 };
867
868 static struct setlist Setlist[] = {
869 #ifdef KLUDGELINEMODE
870 { "echo", "character to toggle local echoing on/off", NULL, &echoc },
871 #endif
872 { "escape", "character to escape back to telnet command mode", NULL, &escape },
873 { "rlogin", "rlogin escape character", 0, &rlogin },
874 { "tracefile", "file to write trace information to", SetNetTrace, (cc_t *)NetTraceFile},
875 { " ", "", NULL, NULL },
876 { " ", "The following need 'localchars' to be toggled true", NULL, NULL },
877 { "flushoutput", "character to cause an Abort Output", NULL, termFlushCharp },
878 { "interrupt", "character to cause an Interrupt Process", NULL, termIntCharp },
879 { "quit", "character to cause an Abort process", NULL, termQuitCharp },
880 { "eof", "character to cause an EOF ", NULL, termEofCharp },
881 { " ", "", NULL, NULL },
882 { " ", "The following are for local editing in linemode", NULL, NULL },
883 { "erase", "character to use to erase a character", NULL, termEraseCharp },
884 { "kill", "character to use to erase a line", NULL, termKillCharp },
885 { "lnext", "character to use for literal next", NULL, termLiteralNextCharp },
886 { "susp", "character to cause a Suspend Process", NULL, termSuspCharp },
887 { "reprint", "character to use for line reprint", NULL, termRprntCharp },
888 { "worderase", "character to use to erase a word", NULL, termWerasCharp },
889 { "start", "character to use for XON", NULL, termStartCharp },
890 { "stop", "character to use for XOFF", NULL, termStopCharp },
891 { "forw1", "alternate end of line character", NULL, termForw1Charp },
892 { "forw2", "alternate end of line character", NULL, termForw2Charp },
893 { "ayt", "alternate AYT character", NULL, termAytCharp },
894 { NULL, NULL, NULL, NULL }
895 };
896
897 static struct setlist *
898 getset(char *name)
899 {
900 return (struct setlist *)
901 genget(name, (char **) Setlist, sizeof(struct setlist));
902 }
903
904 void
905 set_escape_char(char *s)
906 {
907 if (rlogin != _POSIX_VDISABLE) {
908 rlogin = (s && *s) ? special(s) : _POSIX_VDISABLE;
909 printf("Telnet rlogin escape character is '%s'.\n",
910 control(rlogin));
911 } else {
912 escape = (s && *s) ? special(s) : _POSIX_VDISABLE;
913 printf("Telnet escape character is '%s'.\n", control(escape));
914 }
915 }
916
917 static int
918 setcmd(int argc, char *argv[])
919 {
920 int value;
921 struct setlist *ct;
922 struct togglelist *c;
923
924 if (argc < 2 || argc > 3) {
925 printf("Format is 'set Name Value'\n'set ?' for help.\n");
926 return 0;
927 }
928 if ((argc == 2) && (isprefix(argv[1], "?") || isprefix(argv[1], "help"))) {
929 for (ct = Setlist; ct->name; ct++)
930 printf("%-15s %s\n", ct->name, ct->help);
931 printf("\n");
932 settogglehelp(1);
933 printf("%-15s %s\n", "?", "display help information");
934 return 0;
935 }
936
937 ct = getset(argv[1]);
938 if (ct == 0) {
939 c = GETTOGGLE(argv[1]);
940 if (c == 0) {
941 fprintf(stderr, "'%s': unknown argument ('set ?' for help).\n",
942 argv[1]);
943 return 0;
944 } else if (Ambiguous((void *)c)) {
945 fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n",
946 argv[1]);
947 return 0;
948 }
949 if (c->variable) {
950 if ((argc == 2) || (strcmp("on", argv[2]) == 0))
951 *c->variable = 1;
952 else if (strcmp("off", argv[2]) == 0)
953 *c->variable = 0;
954 else {
955 printf("Format is 'set togglename [on|off]'\n'set ?' for help.\n");
956 return 0;
957 }
958 if (c->actionexplanation) {
959 printf("%s %s.\n", *c->variable? "Will" : "Won't",
960 c->actionexplanation);
961 }
962 }
963 if (c->handler)
964 (*c->handler)(1);
965 } else if (argc != 3) {
966 printf("Format is 'set Name Value'\n'set ?' for help.\n");
967 return 0;
968 } else if (Ambiguous((void *)ct)) {
969 fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n",
970 argv[1]);
971 return 0;
972 } else if (ct->handler) {
973 (*ct->handler)(argv[2]);
974 printf("%s set to \"%s\".\n", ct->name, (char *)ct->charp);
975 } else {
976 if (strcmp("off", argv[2])) {
977 value = special(argv[2]);
978 } else {
979 value = _POSIX_VDISABLE;
980 }
981 *(ct->charp) = (cc_t)value;
982 printf("%s character is '%s'.\n", ct->name, control(*(ct->charp)));
983 }
984 slc_check();
985 return 1;
986 }
987
988 static int
989 unsetcmd(int argc, char *argv[])
990 {
991 struct setlist *ct;
992 struct togglelist *c;
993 char *name;
994
995 if (argc < 2) {
996 fprintf(stderr,
997 "Need an argument to 'unset' command. 'unset ?' for help.\n");
998 return 0;
999 }
1000 if (isprefix(argv[1], "?") || isprefix(argv[1], "help")) {
1001 for (ct = Setlist; ct->name; ct++)
1002 printf("%-15s %s\n", ct->name, ct->help);
1003 printf("\n");
1004 settogglehelp(0);
1005 printf("%-15s %s\n", "?", "display help information");
1006 return 0;
1007 }
1008
1009 argc--;
1010 argv++;
1011 while (argc--) {
1012 name = *argv++;
1013 ct = getset(name);
1014 if (ct == 0) {
1015 c = GETTOGGLE(name);
1016 if (c == 0) {
1017 fprintf(stderr, "'%s': unknown argument ('unset ?' for help).\n",
1018 name);
1019 return 0;
1020 } else if (Ambiguous((void *)c)) {
1021 fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\n",
1022 name);
1023 return 0;
1024 }
1025 if (c->variable) {
1026 *c->variable = 0;
1027 if (c->actionexplanation) {
1028 printf("%s %s.\n", *c->variable? "Will" : "Won't",
1029 c->actionexplanation);
1030 }
1031 }
1032 if (c->handler)
1033 (*c->handler)(0);
1034 } else if (Ambiguous((void *)ct)) {
1035 fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\n",
1036 name);
1037 return 0;
1038 } else if (ct->handler) {
1039 (*ct->handler)(0);
1040 printf("%s reset to \"%s\".\n", ct->name, (char *)ct->charp);
1041 } else {
1042 *(ct->charp) = _POSIX_VDISABLE;
1043 printf("%s character is '%s'.\n", ct->name, control(*(ct->charp)));
1044 }
1045 }
1046 return 1;
1047 }
1048 \f
1049 /*
1050 * The following are the data structures and routines for the
1051 * 'mode' command.
1052 */
1053 #ifdef KLUDGELINEMODE
1054 extern int kludgelinemode;
1055
1056 static int
1057 dokludgemode(void)
1058 {
1059 kludgelinemode = 1;
1060 send_wont(TELOPT_LINEMODE, 1);
1061 send_dont(TELOPT_SGA, 1);
1062 send_dont(TELOPT_ECHO, 1);
1063 return 1;
1064 }
1065 #endif
1066
1067 static int
1068 dolinemode(void)
1069 {
1070 #ifdef KLUDGELINEMODE
1071 if (kludgelinemode)
1072 send_dont(TELOPT_SGA, 1);
1073 #endif
1074 send_will(TELOPT_LINEMODE, 1);
1075 send_dont(TELOPT_ECHO, 1);
1076 return 1;
1077 }
1078
1079 static int
1080 docharmode(void)
1081 {
1082 #ifdef KLUDGELINEMODE
1083 if (kludgelinemode)
1084 send_do(TELOPT_SGA, 1);
1085 else
1086 #endif
1087 send_wont(TELOPT_LINEMODE, 1);
1088 send_do(TELOPT_ECHO, 1);
1089 return 1;
1090 }
1091
1092 static int
1093 dolmmode(int bit, int on)
1094 {
1095 unsigned char c;
1096 extern int linemode;
1097
1098 if (my_want_state_is_wont(TELOPT_LINEMODE)) {
1099 printf("?Need to have LINEMODE option enabled first.\n");
1100 printf("'mode ?' for help.\n");
1101 return 0;
1102 }
1103
1104 if (on)
1105 c = (linemode | bit);
1106 else
1107 c = (linemode & ~bit);
1108 lm_mode(&c, 1, 1);
1109 return 1;
1110 }
1111
1112 static int
1113 setmod(int bit)
1114 {
1115 return dolmmode(bit, 1);
1116 }
1117
1118 static int
1119 clearmode(int bit)
1120 {
1121 return dolmmode(bit, 0);
1122 }
1123
1124 struct modelist {
1125 const char *name; /* command name */
1126 const char *help; /* help string */
1127 int (*handler)(int);/* routine which executes command */
1128 int needconnect; /* Do we need to be connected to execute? */
1129 int arg1;
1130 };
1131
1132 static struct modelist ModeList[] = {
1133 { "character", "Disable LINEMODE option", (int (*)(int))docharmode, 1, 0 },
1134 #ifdef KLUDGELINEMODE
1135 { "", "(or disable obsolete line-by-line mode)", NULL, 0, 0 },
1136 #endif
1137 { "line", "Enable LINEMODE option", (int (*)(int))dolinemode, 1, 0 },
1138 #ifdef KLUDGELINEMODE
1139 { "", "(or enable obsolete line-by-line mode)", NULL, 0, 0 },
1140 #endif
1141 { "", "", NULL, 0, 0 },
1142 { "", "These require the LINEMODE option to be enabled", NULL, 0, 0 },
1143 { "isig", "Enable signal trapping", setmod, 1, MODE_TRAPSIG },
1144 { "+isig", 0, setmod, 1, MODE_TRAPSIG },
1145 { "-isig", "Disable signal trapping", clearmode, 1, MODE_TRAPSIG },
1146 { "edit", "Enable character editing", setmod, 1, MODE_EDIT },
1147 { "+edit", 0, setmod, 1, MODE_EDIT },
1148 { "-edit", "Disable character editing", clearmode, 1, MODE_EDIT },
1149 { "softtabs", "Enable tab expansion", setmod, 1, MODE_SOFT_TAB },
1150 { "+softtabs", 0, setmod, 1, MODE_SOFT_TAB },
1151 { "-softtabs", "Disable character editing", clearmode, 1, MODE_SOFT_TAB },
1152 { "litecho", "Enable literal character echo", setmod, 1, MODE_LIT_ECHO },
1153 { "+litecho", 0, setmod, 1, MODE_LIT_ECHO },
1154 { "-litecho", "Disable literal character echo", clearmode, 1, MODE_LIT_ECHO },
1155 { "help", 0, (int (*)(int))modehelp, 0, 0 },
1156 #ifdef KLUDGELINEMODE
1157 { "kludgeline", 0, (int (*)(int))dokludgemode, 1, 0 },
1158 #endif
1159 { "", "", NULL, 0, 0 },
1160 { "?", "Print help information", (int (*)(int))modehelp, 0, 0 },
1161 { NULL, NULL, NULL, 0, 0 },
1162 };
1163
1164
1165 static int
1166 modehelp(void)
1167 {
1168 struct modelist *mt;
1169
1170 printf("format is: 'mode Mode', where 'Mode' is one of:\n\n");
1171 for (mt = ModeList; mt->name; mt++) {
1172 if (mt->help) {
1173 if (*mt->help)
1174 printf("%-15s %s\n", mt->name, mt->help);
1175 else
1176 printf("\n");
1177 }
1178 }
1179 return 0;
1180 }
1181
1182 #define GETMODECMD(name) (struct modelist *) \
1183 genget(name, (char **) ModeList, sizeof(struct modelist))
1184
1185 static int
1186 modecmd(int argc, char *argv[])
1187 {
1188 struct modelist *mt;
1189
1190 if (argc != 2) {
1191 printf("'mode' command requires an argument\n");
1192 printf("'mode ?' for help.\n");
1193 } else if ((mt = GETMODECMD(argv[1])) == 0) {
1194 fprintf(stderr, "Unknown mode '%s' ('mode ?' for help).\n", argv[1]);
1195 } else if (Ambiguous((void *)mt)) {
1196 fprintf(stderr, "Ambiguous mode '%s' ('mode ?' for help).\n", argv[1]);
1197 } else if (mt->needconnect && !connected) {
1198 printf("?Need to be connected first.\n");
1199 printf("'mode ?' for help.\n");
1200 } else if (mt->handler) {
1201 return (*mt->handler)(mt->arg1);
1202 }
1203 return 0;
1204 }
1205 \f
1206 /*
1207 * The following data structures and routines implement the
1208 * "display" command.
1209 */
1210
1211 static int
1212 display(int argc, char *argv[])
1213 {
1214 struct togglelist *tl;
1215 struct setlist *sl;
1216
1217 #define dotog(tl) if (tl->variable && tl->actionexplanation) { \
1218 if (*tl->variable) { \
1219 printf("will"); \
1220 } else { \
1221 printf("won't"); \
1222 } \
1223 printf(" %s.\n", tl->actionexplanation); \
1224 }
1225
1226 #define doset(sl) if (sl->name && *sl->name != ' ') { \
1227 if (sl->handler == 0) \
1228 printf("%-15s [%s]\n", sl->name, control(*sl->charp)); \
1229 else \
1230 printf("%-15s \"%s\"\n", sl->name, (char *)sl->charp); \
1231 }
1232
1233 if (argc == 1) {
1234 for (tl = Togglelist; tl->name; tl++) {
1235 dotog(tl);
1236 }
1237 printf("\n");
1238 for (sl = Setlist; sl->name; sl++) {
1239 doset(sl);
1240 }
1241 } else {
1242 int i;
1243
1244 for (i = 1; i < argc; i++) {
1245 sl = getset(argv[i]);
1246 tl = GETTOGGLE(argv[i]);
1247 if (Ambiguous((void *)sl) || Ambiguous((void *)tl)) {
1248 printf("?Ambiguous argument '%s'.\n", argv[i]);
1249 return 0;
1250 } else if (!sl && !tl) {
1251 printf("?Unknown argument '%s'.\n", argv[i]);
1252 return 0;
1253 } else {
1254 if (tl) {
1255 dotog(tl);
1256 }
1257 if (sl) {
1258 doset(sl);
1259 }
1260 }
1261 }
1262 }
1263 /*@*/optionstatus();
1264 #ifdef ENCRYPTION
1265 EncryptStatus();
1266 #endif /* ENCRYPTION */
1267 return 1;
1268 #undef doset
1269 #undef dotog
1270 }
1271 \f
1272 /*
1273 * The following are the data structures, and many of the routines,
1274 * relating to command processing.
1275 */
1276
1277 /*
1278 * Set the escape character.
1279 */
1280 static int
1281 setescape(int argc, char *argv[])
1282 {
1283 char *arg;
1284 char buf[50];
1285
1286 printf(
1287 "Deprecated usage - please use 'set escape%s%s' in the future.\n",
1288 (argc > 2)? " ":"", (argc > 2)? argv[1]: "");
1289 if (argc > 2)
1290 arg = argv[1];
1291 else {
1292 printf("new escape character: ");
1293 (void) fgets(buf, sizeof(buf), stdin);
1294 arg = buf;
1295 }
1296 if (arg[0] != '\0')
1297 escape = arg[0];
1298 (void) fflush(stdout);
1299 return 1;
1300 }
1301
1302 static int
1303 togcrmod(void)
1304 {
1305 crmod = !crmod;
1306 printf("Deprecated usage - please use 'toggle crmod' in the future.\n");
1307 printf("%s map carriage return on output.\n", crmod ? "Will" : "Won't");
1308 (void) fflush(stdout);
1309 return 1;
1310 }
1311
1312 static int
1313 suspend(void)
1314 {
1315 #ifdef SIGTSTP
1316 setcommandmode();
1317 {
1318 long oldrows, oldcols, newrows, newcols, err_;
1319
1320 err_ = (TerminalWindowSize(&oldrows, &oldcols) == 0) ? 1 : 0;
1321 (void) kill(0, SIGTSTP);
1322 /*
1323 * If we didn't get the window size before the SUSPEND, but we
1324 * can get them now (?), then send the NAWS to make sure that
1325 * we are set up for the right window size.
1326 */
1327 if (TerminalWindowSize(&newrows, &newcols) && connected &&
1328 (err_ || ((oldrows != newrows) || (oldcols != newcols)))) {
1329 sendnaws();
1330 }
1331 }
1332 /* reget parameters in case they were changed */
1333 TerminalSaveState();
1334 setconnmode(0);
1335 #else
1336 printf("Suspend is not supported. Try the '!' command instead\n");
1337 #endif
1338 return 1;
1339 }
1340
1341 static int
1342 shell(int argc, char *argv[] __unused)
1343 {
1344 long oldrows, oldcols, newrows, newcols, err_;
1345
1346 setcommandmode();
1347
1348 err_ = (TerminalWindowSize(&oldrows, &oldcols) == 0) ? 1 : 0;
1349 switch(vfork()) {
1350 case -1:
1351 perror("Fork failed\n");
1352 break;
1353
1354 case 0:
1355 {
1356 /*
1357 * Fire up the shell in the child.
1358 */
1359 const char *shellp, *shellname;
1360
1361 shellp = getenv("SHELL");
1362 if (shellp == NULL)
1363 shellp = "/bin/sh";
1364 if ((shellname = strrchr(shellp, '/')) == 0)
1365 shellname = shellp;
1366 else
1367 shellname++;
1368 if (argc > 1)
1369 execl(shellp, shellname, "-c", &saveline[1], NULL);
1370 else
1371 execl(shellp, shellname, NULL);
1372 perror("Execl");
1373 _exit(1);
1374 }
1375 default:
1376 (void)wait(NULL); /* Wait for the shell to complete */
1377
1378 if (TerminalWindowSize(&newrows, &newcols) && connected &&
1379 (err_ || ((oldrows != newrows) || (oldcols != newcols)))) {
1380 sendnaws();
1381 }
1382 break;
1383 }
1384 return 1;
1385 }
1386
1387 static int
1388 bye(int argc, char *argv[])
1389 {
1390 extern int resettermname;
1391
1392 if (connected) {
1393 (void) shutdown(net, SHUT_RDWR);
1394 printf("Connection closed.\n");
1395 (void) NetClose(net);
1396 connected = 0;
1397 resettermname = 1;
1398 #ifdef AUTHENTICATION
1399 #ifdef ENCRYPTION
1400 auth_encrypt_connect(connected);
1401 #endif
1402 #endif
1403 /* reset options */
1404 tninit();
1405 }
1406 if ((argc != 2) || (strcmp(argv[1], "fromquit") != 0)) {
1407 longjmp(toplevel, 1);
1408 /* NOTREACHED */
1409 }
1410 return 1; /* Keep lint, etc., happy */
1411 }
1412
1413 void
1414 quit(void)
1415 {
1416 (void) call(bye, "bye", "fromquit", 0);
1417 Exit(0);
1418 }
1419
1420 static int
1421 logout(void)
1422 {
1423 send_do(TELOPT_LOGOUT, 1);
1424 (void) netflush();
1425 return 1;
1426 }
1427
1428 \f
1429 /*
1430 * The SLC command.
1431 */
1432
1433 struct slclist {
1434 const char *name;
1435 const char *help;
1436 void (*handler)(int);
1437 int arg;
1438 };
1439
1440 static void slc_help(void);
1441
1442 struct slclist SlcList[] = {
1443 { "export", "Use local special character definitions",
1444 (void (*)(int))slc_mode_export, 0 },
1445 { "import", "Use remote special character definitions",
1446 slc_mode_import, 1 },
1447 { "check", "Verify remote special character definitions",
1448 slc_mode_import, 0 },
1449 { "help", NULL, (void (*)(int))slc_help, 0 },
1450 { "?", "Print help information", (void (*)(int))slc_help, 0 },
1451 { NULL, NULL, NULL, 0 },
1452 };
1453
1454 static void
1455 slc_help(void)
1456 {
1457 struct slclist *c;
1458
1459 for (c = SlcList; c->name; c++) {
1460 if (c->help) {
1461 if (*c->help)
1462 printf("%-15s %s\n", c->name, c->help);
1463 else
1464 printf("\n");
1465 }
1466 }
1467 }
1468
1469 static struct slclist *
1470 getslc(char *name)
1471 {
1472 return (struct slclist *)
1473 genget(name, (char **) SlcList, sizeof(struct slclist));
1474 }
1475
1476 static int
1477 slccmd(int argc, char *argv[])
1478 {
1479 struct slclist *c;
1480
1481 if (argc != 2) {
1482 fprintf(stderr,
1483 "Need an argument to 'slc' command. 'slc ?' for help.\n");
1484 return 0;
1485 }
1486 c = getslc(argv[1]);
1487 if (c == 0) {
1488 fprintf(stderr, "'%s': unknown argument ('slc ?' for help).\n",
1489 argv[1]);
1490 return 0;
1491 }
1492 if (Ambiguous((void *)c)) {
1493 fprintf(stderr, "'%s': ambiguous argument ('slc ?' for help).\n",
1494 argv[1]);
1495 return 0;
1496 }
1497 (*c->handler)(c->arg);
1498 slcstate();
1499 return 1;
1500 }
1501 \f
1502 /*
1503 * The ENVIRON command.
1504 */
1505
1506 struct envlist {
1507 const char *name;
1508 const char *help;
1509 void (*handler)(unsigned char *, unsigned char *);
1510 int narg;
1511 };
1512
1513 extern struct env_lst *
1514 env_define(const unsigned char *, unsigned char *);
1515 extern void
1516 env_undefine(unsigned char *),
1517 env_export(const unsigned char *),
1518 env_unexport(const unsigned char *),
1519 env_send(unsigned char *),
1520 #if defined(OLD_ENVIRON) && defined(ENV_HACK)
1521 env_varval(unsigned char *),
1522 #endif
1523 env_list(void);
1524 static void
1525 env_help(void);
1526
1527 struct envlist EnvList[] = {
1528 { "define", "Define an environment variable",
1529 (void (*)(unsigned char *, unsigned char *))env_define, 2 },
1530 { "undefine", "Undefine an environment variable",
1531 (void (*)(unsigned char *, unsigned char *))env_undefine, 1 },
1532 { "export", "Mark an environment variable for automatic export",
1533 (void (*)(unsigned char *, unsigned char *))env_export, 1 },
1534 { "unexport", "Don't mark an environment variable for automatic export",
1535 (void (*)(unsigned char *, unsigned char *))env_unexport, 1 },
1536 { "send", "Send an environment variable", (void (*)(unsigned char *, unsigned char *))env_send, 1 },
1537 { "list", "List the current environment variables",
1538 (void (*)(unsigned char *, unsigned char *))env_list, 0 },
1539 #if defined(OLD_ENVIRON) && defined(ENV_HACK)
1540 { "varval", "Reverse VAR and VALUE (auto, right, wrong, status)",
1541 (void (*)(unsigned char *, unsigned char *))env_varval, 1 },
1542 #endif
1543 { "help", NULL, (void (*)(unsigned char *, unsigned char *))env_help, 0 },
1544 { "?", "Print help information", (void (*)(unsigned char *, unsigned char *))env_help, 0 },
1545 { NULL, NULL, NULL, 0 },
1546 };
1547
1548 static void
1549 env_help(void)
1550 {
1551 struct envlist *c;
1552
1553 for (c = EnvList; c->name; c++) {
1554 if (c->help) {
1555 if (*c->help)
1556 printf("%-15s %s\n", c->name, c->help);
1557 else
1558 printf("\n");
1559 }
1560 }
1561 }
1562
1563 static struct envlist *
1564 getenvcmd(char *name)
1565 {
1566 return (struct envlist *)
1567 genget(name, (char **) EnvList, sizeof(struct envlist));
1568 }
1569
1570 static int
1571 env_cmd(int argc, char *argv[])
1572 {
1573 struct envlist *c;
1574
1575 if (argc < 2) {
1576 fprintf(stderr,
1577 "Need an argument to 'environ' command. 'environ ?' for help.\n");
1578 return 0;
1579 }
1580 c = getenvcmd(argv[1]);
1581 if (c == 0) {
1582 fprintf(stderr, "'%s': unknown argument ('environ ?' for help).\n",
1583 argv[1]);
1584 return 0;
1585 }
1586 if (Ambiguous((void *)c)) {
1587 fprintf(stderr, "'%s': ambiguous argument ('environ ?' for help).\n",
1588 argv[1]);
1589 return 0;
1590 }
1591 if (c->narg + 2 != argc) {
1592 fprintf(stderr,
1593 "Need %s%d argument%s to 'environ %s' command. 'environ ?' for help.\n",
1594 c->narg < argc + 2 ? "only " : "",
1595 c->narg, c->narg == 1 ? "" : "s", c->name);
1596 return 0;
1597 }
1598 (*c->handler)(argv[2], argv[3]);
1599 return 1;
1600 }
1601
1602 struct env_lst {
1603 struct env_lst *next; /* pointer to next structure */
1604 struct env_lst *prev; /* pointer to previous structure */
1605 unsigned char *var; /* pointer to variable name */
1606 unsigned char *value; /* pointer to variable value */
1607 int export; /* 1 -> export with default list of variables */
1608 int welldefined; /* A well defined variable */
1609 };
1610
1611 struct env_lst envlisthead;
1612
1613 static struct env_lst *
1614 env_find(const unsigned char *var)
1615 {
1616 struct env_lst *ep;
1617
1618 for (ep = envlisthead.next; ep; ep = ep->next) {
1619 if (strcmp(ep->var, var) == 0)
1620 return(ep);
1621 }
1622 return(NULL);
1623 }
1624
1625 void
1626 env_init(void)
1627 {
1628 extern char **environ;
1629 char **epp, *cp;
1630 struct env_lst *ep;
1631
1632 for (epp = environ; *epp; epp++) {
1633 if ((cp = strchr(*epp, '='))) {
1634 *cp = '\0';
1635 ep = env_define((unsigned char *)*epp,
1636 (unsigned char *)cp+1);
1637 ep->export = 0;
1638 *cp = '=';
1639 }
1640 }
1641 /*
1642 * Special case for DISPLAY variable. If it is ":0.0" or
1643 * "unix:0.0", we have to get rid of "unix" and insert our
1644 * hostname.
1645 */
1646 if ((ep = env_find("DISPLAY"))
1647 && ((*ep->value == ':')
1648 || (strncmp((char *)ep->value, "unix:", 5) == 0))) {
1649 char hbuf[256+1];
1650 char *cp2 = strchr((char *)ep->value, ':');
1651
1652 gethostname(hbuf, 256);
1653 hbuf[256] = '\0';
1654 cp = (char *)malloc(strlen(hbuf) + strlen(cp2) + 1);
1655 sprintf((char *)cp, "%s%s", hbuf, cp2);
1656 free(ep->value);
1657 ep->value = (unsigned char *)cp;
1658 }
1659 /*
1660 * If USER is not defined, but LOGNAME is, then add
1661 * USER with the value from LOGNAME. By default, we
1662 * don't export the USER variable.
1663 */
1664 if ((env_find("USER") == NULL) && (ep = env_find("LOGNAME"))) {
1665 env_define("USER", ep->value);
1666 env_unexport("USER");
1667 }
1668 env_export("DISPLAY");
1669 env_export("PRINTER");
1670 }
1671
1672 struct env_lst *
1673 env_define(const unsigned char *var, unsigned char *value)
1674 {
1675 struct env_lst *ep;
1676
1677 if ((ep = env_find(var))) {
1678 if (ep->var)
1679 free(ep->var);
1680 if (ep->value)
1681 free(ep->value);
1682 } else {
1683 ep = (struct env_lst *)malloc(sizeof(struct env_lst));
1684 ep->next = envlisthead.next;
1685 envlisthead.next = ep;
1686 ep->prev = &envlisthead;
1687 if (ep->next)
1688 ep->next->prev = ep;
1689 }
1690 ep->welldefined = opt_welldefined(var);
1691 ep->export = 1;
1692 ep->var = strdup(var);
1693 ep->value = strdup(value);
1694 return(ep);
1695 }
1696
1697 void
1698 env_undefine(unsigned char *var)
1699 {
1700 struct env_lst *ep;
1701
1702 if ((ep = env_find(var))) {
1703 ep->prev->next = ep->next;
1704 if (ep->next)
1705 ep->next->prev = ep->prev;
1706 if (ep->var)
1707 free(ep->var);
1708 if (ep->value)
1709 free(ep->value);
1710 free(ep);
1711 }
1712 }
1713
1714 void
1715 env_export(const unsigned char *var)
1716 {
1717 struct env_lst *ep;
1718
1719 if ((ep = env_find(var)))
1720 ep->export = 1;
1721 }
1722
1723 void
1724 env_unexport(const unsigned char *var)
1725 {
1726 struct env_lst *ep;
1727
1728 if ((ep = env_find(var)))
1729 ep->export = 0;
1730 }
1731
1732 void
1733 env_send(unsigned char *var)
1734 {
1735 struct env_lst *ep;
1736
1737 if (my_state_is_wont(TELOPT_NEW_ENVIRON)
1738 #ifdef OLD_ENVIRON
1739 && my_state_is_wont(TELOPT_OLD_ENVIRON)
1740 #endif
1741 ) {
1742 fprintf(stderr,
1743 "Cannot send '%s': Telnet ENVIRON option not enabled\n",
1744 var);
1745 return;
1746 }
1747 ep = env_find(var);
1748 if (ep == 0) {
1749 fprintf(stderr, "Cannot send '%s': variable not defined\n",
1750 var);
1751 return;
1752 }
1753 env_opt_start_info();
1754 env_opt_add(ep->var);
1755 env_opt_end(0);
1756 }
1757
1758 void
1759 env_list(void)
1760 {
1761 struct env_lst *ep;
1762
1763 for (ep = envlisthead.next; ep; ep = ep->next) {
1764 printf("%c %-20s %s\n", ep->export ? '*' : ' ',
1765 ep->var, ep->value);
1766 }
1767 }
1768
1769 unsigned char *
1770 env_default(int init, int welldefined)
1771 {
1772 static struct env_lst *nep = NULL;
1773
1774 if (init) {
1775 nep = &envlisthead;
1776 return(NULL);
1777 }
1778 if (nep) {
1779 while ((nep = nep->next)) {
1780 if (nep->export && (nep->welldefined == welldefined))
1781 return(nep->var);
1782 }
1783 }
1784 return(NULL);
1785 }
1786
1787 unsigned char *
1788 env_getvalue(const unsigned char *var)
1789 {
1790 struct env_lst *ep;
1791
1792 if ((ep = env_find(var)))
1793 return(ep->value);
1794 return(NULL);
1795 }
1796
1797 #if defined(OLD_ENVIRON) && defined(ENV_HACK)
1798 void
1799 env_varval(unsigned char *what)
1800 {
1801 extern int old_env_var, old_env_value, env_auto;
1802 int len = strlen((char *)what);
1803
1804 if (len == 0)
1805 goto unknown;
1806
1807 if (strncasecmp((char *)what, "status", len) == 0) {
1808 if (env_auto)
1809 printf("%s%s", "VAR and VALUE are/will be ",
1810 "determined automatically\n");
1811 if (old_env_var == OLD_ENV_VAR)
1812 printf("VAR and VALUE set to correct definitions\n");
1813 else
1814 printf("VAR and VALUE definitions are reversed\n");
1815 } else if (strncasecmp((char *)what, "auto", len) == 0) {
1816 env_auto = 1;
1817 old_env_var = OLD_ENV_VALUE;
1818 old_env_value = OLD_ENV_VAR;
1819 } else if (strncasecmp((char *)what, "right", len) == 0) {
1820 env_auto = 0;
1821 old_env_var = OLD_ENV_VAR;
1822 old_env_value = OLD_ENV_VALUE;
1823 } else if (strncasecmp((char *)what, "wrong", len) == 0) {
1824 env_auto = 0;
1825 old_env_var = OLD_ENV_VALUE;
1826 old_env_value = OLD_ENV_VAR;
1827 } else {
1828 unknown:
1829 printf("Unknown \"varval\" command. (\"auto\", \"right\", \"wrong\", \"status\")\n");
1830 }
1831 }
1832 #endif
1833
1834 #ifdef AUTHENTICATION
1835 /*
1836 * The AUTHENTICATE command.
1837 */
1838
1839 struct authlist {
1840 const char *name;
1841 const char *help;
1842 int (*handler)(char *);
1843 int narg;
1844 };
1845
1846 extern int
1847 auth_enable(char *),
1848 auth_disable(char *),
1849 auth_status(void);
1850 static int
1851 auth_help(void);
1852
1853 struct authlist AuthList[] = {
1854 { "status", "Display current status of authentication information",
1855 (int (*)(char *))auth_status, 0 },
1856 { "disable", "Disable an authentication type ('auth disable ?' for more)",
1857 auth_disable, 1 },
1858 { "enable", "Enable an authentication type ('auth enable ?' for more)",
1859 auth_enable, 1 },
1860 { "help", NULL, (int (*)(char *))auth_help, 0 },
1861 { "?", "Print help information", (int (*)(char *))auth_help, 0 },
1862 { NULL, NULL, NULL, 0 },
1863 };
1864
1865 static int
1866 auth_help(void)
1867 {
1868 struct authlist *c;
1869
1870 for (c = AuthList; c->name; c++) {
1871 if (c->help) {
1872 if (*c->help)
1873 printf("%-15s %s\n", c->name, c->help);
1874 else
1875 printf("\n");
1876 }
1877 }
1878 return 0;
1879 }
1880
1881 int
1882 auth_cmd(int argc, char *argv[])
1883 {
1884 struct authlist *c;
1885
1886 if (argc < 2) {
1887 fprintf(stderr,
1888 "Need an argument to 'auth' command. 'auth ?' for help.\n");
1889 return 0;
1890 }
1891
1892 c = (struct authlist *)
1893 genget(argv[1], (char **) AuthList, sizeof(struct authlist));
1894 if (c == 0) {
1895 fprintf(stderr, "'%s': unknown argument ('auth ?' for help).\n",
1896 argv[1]);
1897 return 0;
1898 }
1899 if (Ambiguous((void *)c)) {
1900 fprintf(stderr, "'%s': ambiguous argument ('auth ?' for help).\n",
1901 argv[1]);
1902 return 0;
1903 }
1904 if (c->narg + 2 != argc) {
1905 fprintf(stderr,
1906 "Need %s%d argument%s to 'auth %s' command. 'auth ?' for help.\n",
1907 c->narg < argc + 2 ? "only " : "",
1908 c->narg, c->narg == 1 ? "" : "s", c->name);
1909 return 0;
1910 }
1911 return((*c->handler)(argv[2]));
1912 }
1913 #endif
1914
1915 #ifdef ENCRYPTION
1916 /*
1917 * The ENCRYPT command.
1918 */
1919
1920 struct encryptlist {
1921 const char *name;
1922 const char *help;
1923 int (*handler)(char *, char *);
1924 int needconnect;
1925 int minarg;
1926 int maxarg;
1927 };
1928
1929 extern int
1930 EncryptEnable(char *, char *),
1931 EncryptDisable(char *, char *),
1932 EncryptType(char *, char *),
1933 EncryptStart(char *),
1934 EncryptStartInput(void),
1935 EncryptStartOutput(void),
1936 EncryptStop(char *),
1937 EncryptStopInput(void),
1938 EncryptStopOutput(void),
1939 EncryptStatus(void);
1940 static int
1941 EncryptHelp(void);
1942
1943 struct encryptlist EncryptList[] = {
1944 { "enable", "Enable encryption. ('encrypt enable ?' for more)",
1945 EncryptEnable, 1, 1, 2 },
1946 { "disable", "Disable encryption. ('encrypt enable ?' for more)",
1947 EncryptDisable, 0, 1, 2 },
1948 { "type", "Set encryption type. ('encrypt type ?' for more)",
1949 EncryptType, 0, 1, 1 },
1950 { "start", "Start encryption. ('encrypt start ?' for more)",
1951 (int (*)(char *, char *))EncryptStart, 1, 0, 1 },
1952 { "stop", "Stop encryption. ('encrypt stop ?' for more)",
1953 (int (*)(char *, char *))EncryptStop, 1, 0, 1 },
1954 { "input", "Start encrypting the input stream",
1955 (int (*)(char *, char *))EncryptStartInput, 1, 0, 0 },
1956 { "-input", "Stop encrypting the input stream",
1957 (int (*)(char *, char *))EncryptStopInput, 1, 0, 0 },
1958 { "output", "Start encrypting the output stream",
1959 (int (*)(char *, char *))EncryptStartOutput, 1, 0, 0 },
1960 { "-output", "Stop encrypting the output stream",
1961 (int (*)(char *, char *))EncryptStopOutput, 1, 0, 0 },
1962
1963 { "status", "Display current status of authentication information",
1964 (int (*)(char *, char *))EncryptStatus, 0, 0, 0 },
1965 { "help", NULL, (int (*)(char *, char *))EncryptHelp, 0, 0, 0 },
1966 { "?", "Print help information", (int (*)(char *, char *))EncryptHelp, 0, 0, 0 },
1967 { NULL, NULL, NULL, 0, 0, 0 },
1968 };
1969
1970 static int
1971 EncryptHelp(void)
1972 {
1973 struct encryptlist *c;
1974
1975 for (c = EncryptList; c->name; c++) {
1976 if (c->help) {
1977 if (*c->help)
1978 printf("%-15s %s\n", c->name, c->help);
1979 else
1980 printf("\n");
1981 }
1982 }
1983 return 0;
1984 }
1985
1986 static int
1987 encrypt_cmd(int argc, char *argv[])
1988 {
1989 struct encryptlist *c;
1990
1991 if (argc < 2) {
1992 fprintf(stderr,
1993 "Need an argument to 'encrypt' command. 'encrypt ?' for help.\n");
1994 return 0;
1995 }
1996
1997 c = (struct encryptlist *)
1998 genget(argv[1], (char **) EncryptList, sizeof(struct encryptlist));
1999 if (c == 0) {
2000 fprintf(stderr, "'%s': unknown argument ('encrypt ?' for help).\n",
2001 argv[1]);
2002 return 0;
2003 }
2004 if (Ambiguous((void *)c)) {
2005 fprintf(stderr, "'%s': ambiguous argument ('encrypt ?' for help).\n",
2006 argv[1]);
2007 return 0;
2008 }
2009 argc -= 2;
2010 if (argc < c->minarg || argc > c->maxarg) {
2011 if (c->minarg == c->maxarg) {
2012 fprintf(stderr, "Need %s%d argument%s ",
2013 c->minarg < argc ? "only " : "", c->minarg,
2014 c->minarg == 1 ? "" : "s");
2015 } else {
2016 fprintf(stderr, "Need %s%d-%d arguments ",
2017 c->maxarg < argc ? "only " : "", c->minarg, c->maxarg);
2018 }
2019 fprintf(stderr, "to 'encrypt %s' command. 'encrypt ?' for help.\n",
2020 c->name);
2021 return 0;
2022 }
2023 if (c->needconnect && !connected) {
2024 if (!(argc && (isprefix(argv[2], "help") || isprefix(argv[2], "?")))) {
2025 printf("?Need to be connected first.\n");
2026 return 0;
2027 }
2028 }
2029 return ((*c->handler)(argc > 0 ? argv[2] : 0,
2030 argc > 1 ? argv[3] : 0));
2031 }
2032 #endif /* ENCRYPTION */
2033
2034 /*
2035 * Print status about the connection.
2036 */
2037 /*ARGSUSED*/
2038 static int
2039 status(int argc, char *argv[])
2040 {
2041 if (connected) {
2042 printf("Connected to %s.\n", hostname);
2043 if ((argc < 2) || strcmp(argv[1], "notmuch")) {
2044 int mode = getconnmode();
2045
2046 if (my_want_state_is_will(TELOPT_LINEMODE)) {
2047 printf("Operating with LINEMODE option\n");
2048 printf("%s line editing\n", (mode&MODE_EDIT) ? "Local" : "No");
2049 printf("%s catching of signals\n",
2050 (mode&MODE_TRAPSIG) ? "Local" : "No");
2051 slcstate();
2052 #ifdef KLUDGELINEMODE
2053 } else if (kludgelinemode && my_want_state_is_dont(TELOPT_SGA)) {
2054 printf("Operating in obsolete linemode\n");
2055 #endif
2056 } else {
2057 printf("Operating in single character mode\n");
2058 if (localchars)
2059 printf("Catching signals locally\n");
2060 }
2061 printf("%s character echo\n", (mode&MODE_ECHO) ? "Local" : "Remote");
2062 if (my_want_state_is_will(TELOPT_LFLOW))
2063 printf("%s flow control\n", (mode&MODE_FLOW) ? "Local" : "No");
2064 #ifdef ENCRYPTION
2065 encrypt_display();
2066 #endif /* ENCRYPTION */
2067 }
2068 } else {
2069 printf("No connection.\n");
2070 }
2071 printf("Escape character is '%s'.\n", control(escape));
2072 (void) fflush(stdout);
2073 return 1;
2074 }
2075
2076 #ifdef SIGINFO
2077 /*
2078 * Function that gets called when SIGINFO is received.
2079 */
2080 void
2081 ayt_status(void)
2082 {
2083 (void) call(status, "status", "notmuch", 0);
2084 }
2085 #endif
2086
2087 static const char *
2088 sockaddr_ntop(struct sockaddr *sa)
2089 {
2090 void *addr;
2091 static char addrbuf[INET6_ADDRSTRLEN];
2092
2093 switch (sa->sa_family) {
2094 case AF_INET:
2095 addr = &((struct sockaddr_in *)sa)->sin_addr;
2096 break;
2097 case AF_UNIX:
2098 addr = &((struct sockaddr_un *)sa)->sun_path;
2099 break;
2100 #ifdef INET6
2101 case AF_INET6:
2102 addr = &((struct sockaddr_in6 *)sa)->sin6_addr;
2103 break;
2104 #endif
2105 default:
2106 return NULL;
2107 }
2108 inet_ntop(sa->sa_family, addr, addrbuf, sizeof(addrbuf));
2109 return addrbuf;
2110 }
2111
2112 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
2113 static int
2114 setpolicy(int lnet, struct addrinfo *res, char *policy)
2115 {
2116 char *buf;
2117 int level;
2118 int optname;
2119
2120 if (policy == NULL)
2121 return 0;
2122
2123 buf = ipsec_set_policy(policy, strlen(policy));
2124 if (buf == NULL) {
2125 printf("%s\n", ipsec_strerror());
2126 return -1;
2127 }
2128 level = res->ai_family == AF_INET ? IPPROTO_IP : IPPROTO_IPV6;
2129 optname = res->ai_family == AF_INET ? IP_IPSEC_POLICY : IPV6_IPSEC_POLICY;
2130 if (setsockopt(lnet, level, optname, buf, ipsec_get_policylen(buf)) < 0){
2131 perror("setsockopt");
2132 return -1;
2133 }
2134
2135 free(buf);
2136 return 0;
2137 }
2138 #endif
2139
2140 #ifdef INET6
2141 /*
2142 * When an Address Family related error happend, check if retry with
2143 * another AF is possible or not.
2144 * Return 1, if retry with another af is OK. Else, return 0.
2145 */
2146 static int
2147 switch_af(struct addrinfo **aip)
2148 {
2149 int nextaf;
2150 struct addrinfo *ai;
2151
2152 ai = *aip;
2153 nextaf = (ai->ai_family == AF_INET) ? AF_INET6 : AF_INET;
2154 do
2155 ai=ai->ai_next;
2156 while (ai != NULL && ai->ai_family != nextaf);
2157 *aip = ai;
2158 if (*aip != NULL) {
2159 return 1;
2160 }
2161 return 0;
2162 }
2163 #endif
2164
2165 int
2166 tn(int argc, char *argv[])
2167 {
2168 char *srp = 0;
2169 int proto, opt;
2170 int srlen;
2171 int srcroute = 0, result;
2172 char *cmd, *hostp = 0, *portp = 0, *user = 0;
2173 char *src_addr = NULL;
2174 struct addrinfo hints, *res, *res0 = NULL, *src_res, *src_res0 = NULL;
2175 int error = 0, af_error = 0;
2176
2177 if (connected) {
2178 printf("?Already connected to %s\n", hostname);
2179 setuid(getuid());
2180 return 0;
2181 }
2182 if (argc < 2) {
2183 (void) strcpy(line, "open ");
2184 printf("(to) ");
2185 (void) fgets(&line[strlen(line)], sizeof(line) - strlen(line), stdin);
2186 makeargv();
2187 argc = margc;
2188 argv = margv;
2189 }
2190 cmd = *argv;
2191 --argc; ++argv;
2192 while (argc) {
2193 if (strcmp(*argv, "help") == 0 || isprefix(*argv, "?"))
2194 goto usage;
2195 if (strcmp(*argv, "-l") == 0) {
2196 --argc; ++argv;
2197 if (argc == 0)
2198 goto usage;
2199 user = *argv++;
2200 --argc;
2201 continue;
2202 }
2203 if (strcmp(*argv, "-a") == 0) {
2204 --argc; ++argv;
2205 autologin = 1;
2206 continue;
2207 }
2208 if (strcmp(*argv, "-s") == 0) {
2209 --argc; ++argv;
2210 if (argc == 0)
2211 goto usage;
2212 src_addr = *argv++;
2213 --argc;
2214 continue;
2215 }
2216 if (hostp == 0) {
2217 hostp = *argv++;
2218 --argc;
2219 continue;
2220 }
2221 if (portp == 0) {
2222 portp = *argv++;
2223 --argc;
2224 continue;
2225 }
2226 usage:
2227 printf("usage: %s [-l user] [-a] [-s src_addr] host-name [port]\n", cmd);
2228 setuid(getuid());
2229 return 0;
2230 }
2231 if (hostp == 0)
2232 goto usage;
2233
2234 if (src_addr != NULL) {
2235 memset(&hints, 0, sizeof(hints));
2236 hints.ai_flags = AI_NUMERICHOST;
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 characters ('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 == NULL)
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 struct ip6_rthdr *rth;
2847 #endif
2848 struct addrinfo hints, *res;
2849 int error;
2850 char c;
2851
2852 /*
2853 * Verify the arguments, and make sure we have
2854 * at least 7 bytes for the option.
2855 */
2856 if (cpp == NULL || lenp == NULL)
2857 return -1;
2858 if (*cpp != NULL) {
2859 switch (res->ai_family) {
2860 case AF_INET:
2861 if (*lenp < 7)
2862 return -1;
2863 break;
2864 #ifdef INET6
2865 case AF_INET6:
2866 if (*lenp < (int)CMSG_SPACE(sizeof(struct ip6_rthdr) +
2867 sizeof(struct in6_addr)))
2868 return -1;
2869 break;
2870 #endif
2871 }
2872 }
2873 /*
2874 * Decide whether we have a buffer passed to us,
2875 * or if we need to use our own static buffer.
2876 */
2877 if (*cpp) {
2878 lsrp = *cpp;
2879 ep = lsrp + *lenp;
2880 } else {
2881 *cpp = lsrp = (char *)ALIGN(buf);
2882 ep = lsrp + 1024;
2883 }
2884
2885 cp = arg;
2886
2887 #ifdef INET6
2888 if (ai->ai_family == AF_INET6) {
2889 /*
2890 * RFC3542 has obsoleted IPV6_PKTOPTIONS socket option.
2891 */
2892 #ifdef COMPAT_RFC1883 /* XXX */
2893 cmsg = NULL;
2894 if (*cp != '@')
2895 return -1;
2896 *protop = IPPROTO_IPV6;
2897 *optp = IPV6_PKTOPTIONS;
2898 #else
2899 return -1;
2900 #endif /* COMPAT_RFC1883 */
2901 } else
2902 #endif
2903 {
2904 /*
2905 * Next, decide whether we have a loose source
2906 * route or a strict source route, and fill in
2907 * the begining of the option.
2908 */
2909 if (*cp == '!') {
2910 cp++;
2911 *lsrp++ = IPOPT_SSRR;
2912 } else
2913 *lsrp++ = IPOPT_LSRR;
2914
2915 if (*cp != '@')
2916 return -1;
2917
2918 lsrp++; /* skip over length, we'll fill it in later */
2919 *lsrp++ = 4;
2920 *protop = IPPROTO_IP;
2921 *optp = IP_OPTIONS;
2922 }
2923
2924 cp++;
2925 memset(&hints, 0, sizeof(hints));
2926 hints.ai_family = ai->ai_family;
2927 hints.ai_socktype = SOCK_STREAM;
2928 for (c = 0;;) {
2929 if (
2930 #ifdef INET6
2931 ai->ai_family != AF_INET6 &&
2932 #endif
2933 c == ':')
2934 cp2 = 0;
2935 else for (cp2 = cp; (c = *cp2); cp2++) {
2936 if (c == ',') {
2937 *cp2++ = '\0';
2938 if (*cp2 == '@')
2939 cp2++;
2940 } else if (c == '@') {
2941 *cp2++ = '\0';
2942 } else if (
2943 #ifdef INET6
2944 ai->ai_family != AF_INET6 &&
2945 #endif
2946 c == ':') {
2947 *cp2++ = '\0';
2948 } else
2949 continue;
2950 break;
2951 }
2952 if (!c)
2953 cp2 = 0;
2954
2955 hints.ai_flags = AI_NUMERICHOST;
2956 error = getaddrinfo(cp, NULL, &hints, &res);
2957 if (error == EAI_NODATA) {
2958 hints.ai_flags = 0;
2959 error = getaddrinfo(cp, NULL, &hints, &res);
2960 }
2961 if (error != 0) {
2962 fprintf(stderr, "%s: %s\n", cp, gai_strerror(error));
2963 if (error == EAI_SYSTEM)
2964 fprintf(stderr, "%s: %s\n", cp,
2965 strerror(errno));
2966 *cpp = cp;
2967 return(0);
2968 }
2969 #ifdef INET6
2970 if (res->ai_family == AF_INET6) {
2971 return(0);
2972 } else
2973 #endif
2974 {
2975 _sin = (struct sockaddr_in *)res->ai_addr;
2976 memcpy(lsrp, (char *)&_sin->sin_addr, 4);
2977 lsrp += 4;
2978 }
2979 if (cp2)
2980 cp = cp2;
2981 else
2982 break;
2983 /*
2984 * Check to make sure there is space for next address
2985 */
2986 #ifdef INET6
2987 #ifdef COMPAT_RFC1883 /* XXX */
2988 if (res->ai_family == AF_INET6) {
2989 if (((char *)CMSG_DATA(cmsg) +
2990 sizeof(struct ip6_rthdr)) > ep)
2991 return -1;
2992 } else
2993 #endif /* COMPAT_RFC1883 */
2994 #endif
2995 if (lsrp + 4 > ep)
2996 return -1;
2997 freeaddrinfo(res);
2998 }
2999 #ifdef INET6
3000 if (res->ai_family == AF_INET6) {
3001 #ifdef COMPAT_RFC1883 /* XXX */
3002 *lenp = 0;
3003 #endif /* COMPAT_RFC1883 */
3004 } else
3005 #endif
3006 {
3007 if ((*(*cpp+IPOPT_OLEN) = lsrp - *cpp) <= 7) {
3008 *cpp = 0;
3009 *lenp = 0;
3010 return -1;
3011 }
3012 *lsrp++ = IPOPT_NOP; /* 32 bit word align it */
3013 *lenp = lsrp - *cpp;
3014 }
3015 freeaddrinfo(res);
3016 return 1;
3017 }
DragonFly BSD