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vfs: check userland buffers before reading them.
[haiku.git] / src / bin / network / telnet / commands.c
blob5be354892dacb040b151a298630cc7902eae2158
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
34 #if 0
35 #ifndef lint
36 static const char sccsid[] = "@(#)commands.c 8.4 (Berkeley) 5/30/95";
37 #endif
38 #endif
39 #include <sys/cdefs.h>
40 __FBSDID("$FreeBSD: src/contrib/telnet/telnet/commands.c,v 1.35 2005/02/28 12:46:52 tobez Exp $");
41
42 #include <sys/param.h>
43 #if (!defined(__BEOS__) && !defined(__HAIKU__))
44 # include <sys/file.h>
45 #endif
46 #include <sys/socket.h>
47 #include <sys/un.h>
48 #include <sys/wait.h>
49 #include <netinet/in.h>
50
51 #include <ctype.h>
52 #include <err.h>
53 #include <errno.h>
54 #include <netdb.h>
55 #include <pwd.h>
56 #include <signal.h>
57 #include <stdarg.h>
58 #include <stdlib.h>
59 #include <string.h>
60 #include <unistd.h>
61
62 #include <arpa/telnet.h>
63 #include <arpa/inet.h>
64
65 #include "general.h"
66
67 #include "ring.h"
68
69 #include "externs.h"
70 #include "defines.h"
71 #include "types.h"
72 #include "misc.h"
73
74 #ifdef AUTHENTICATION
75 #include <libtelnet/auth.h>
76 #endif
77 #ifdef ENCRYPTION
78 #include <libtelnet/encrypt.h>
79 #endif
80
81 //#include <netinet/in_systm.h>
82 #include <netinet/ip.h>
83 //#include <netinet/ip6.h>
84
85 #ifndef MAXHOSTNAMELEN
86 #define MAXHOSTNAMELEN 256
87 #endif
88
89 typedef int (*intrtn_t)(int, char **);
90
91 #ifdef AUTHENTICATION
92 extern int auth_togdebug(int);
93 #endif
94 #ifdef ENCRYPTION
95 extern int EncryptAutoEnc(int);
96 extern int EncryptAutoDec(int);
97 extern int EncryptDebug(int);
98 extern int EncryptVerbose(int);
99 #endif /* ENCRYPTION */
100 #if defined(IPPROTO_IP) && defined(IP_TOS)
101 int tos = -1;
102 #endif /* defined(IPPROTO_IP) && defined(IP_TOS) */
103
104 char *hostname;
105 static char _hostname[MAXHOSTNAMELEN];
106
107 static int help(int, char **);
108 static int call(intrtn_t, ...);
109 static void cmdrc(char *, char *);
110 #ifdef INET6
111 static int switch_af(struct addrinfo **);
112 #endif
113 static int togglehelp(void);
114 static int send_tncmd(void (*)(int, int), const char *, char *);
115 static int setmod(int);
116 static int clearmode(int);
117 static int modehelp(void);
118 static int sourceroute(struct addrinfo *, char *, char **, int *, int *, int *);
119
120 typedef struct {
121 const char *name; /* command name */
122 const char *help; /* help string (NULL for no help) */
123 int (*handler)(int, char **); /* routine which executes command */
124 int needconnect; /* Do we need to be connected to execute? */
125 } Command;
126
127 static char line[256];
128 static char saveline[256];
129 static int margc;
130 static char *margv[20];
131
132 #ifdef OPIE
133 #include <sys/wait.h>
134 #define PATH_OPIEKEY "/usr/bin/opiekey"
135 static int
136 opie_calc(int argc, char *argv[])
137 {
138 int status;
139
140 if(argc != 3) {
141 printf("%s sequence challenge\n", argv[0]);
142 return (0);
143 }
144
145 switch(fork()) {
146 case 0:
147 execv(PATH_OPIEKEY, argv);
148 exit (1);
149 case -1:
150 perror("fork");
151 break;
152 default:
153 (void) wait(&status);
154 if (WIFEXITED(status))
155 return (WEXITSTATUS(status));
156 }
157 return (0);
158 }
159 #endif
160
161 static void
162 makeargv(void)
163 {
164 char *cp, *cp2, c;
165 char **argp = margv;
166
167 margc = 0;
168 cp = line;
169 if (*cp == '!') { /* Special case shell escape */
170 strcpy(saveline, line); /* save for shell command */
171 *argp++ = strdup("!"); /* No room in string to get this */
172 margc++;
173 cp++;
174 }
175 while ((c = *cp)) {
176 int inquote = 0;
177 while (isspace(c))
178 c = *++cp;
179 if (c == '\0')
180 break;
181 *argp++ = cp;
182 margc += 1;
183 for (cp2 = cp; c != '\0'; c = *++cp) {
184 if (inquote) {
185 if (c == inquote) {
186 inquote = 0;
187 continue;
188 }
189 } else {
190 if (c == '\\') {
191 if ((c = *++cp) == '\0')
192 break;
193 } else if (c == '"') {
194 inquote = '"';
195 continue;
196 } else if (c == '\'') {
197 inquote = '\'';
198 continue;
199 } else if (isspace(c))
200 break;
201 }
202 *cp2++ = c;
203 }
204 *cp2 = '\0';
205 if (c == '\0')
206 break;
207 cp++;
208 }
209 *argp++ = 0;
210 }
211
212 /*
213 * Make a character string into a number.
214 *
215 * Todo: 1. Could take random integers (12, 0x12, 012, 0b1).
216 */
217
218 static int
219 special(char *s)
220 {
221 char c;
222 char b;
223
224 switch (*s) {
225 case '^':
226 b = *++s;
227 if (b == '?') {
228 c = b | 0x40; /* DEL */
229 } else {
230 c = b & 0x1f;
231 }
232 break;
233 default:
234 c = *s;
235 break;
236 }
237 return c;
238 }
239
240 /*
241 * Construct a control character sequence
242 * for a special character.
243 */
244 static const char *
245 control(cc_t c)
246 {
247 static char buf[5];
248 /*
249 * The only way I could get the Sun 3.5 compiler
250 * to shut up about
251 * if ((unsigned int)c >= 0x80)
252 * was to assign "c" to an unsigned int variable...
253 * Arggg....
254 */
255 unsigned int uic = (unsigned int)c;
256
257 if (uic == 0x7f)
258 return ("^?");
259 if (c == (cc_t)_POSIX_VDISABLE) {
260 return "off";
261 }
262 if (uic >= 0x80) {
263 buf[0] = '\\';
264 buf[1] = ((c>>6)&07) + '0';
265 buf[2] = ((c>>3)&07) + '0';
266 buf[3] = (c&07) + '0';
267 buf[4] = 0;
268 } else if (uic >= 0x20) {
269 buf[0] = c;
270 buf[1] = 0;
271 } else {
272 buf[0] = '^';
273 buf[1] = '@'+c;
274 buf[2] = 0;
275 }
276 return (buf);
277 }
278
279 /*
280 * The following are data structures and routines for
281 * the "send" command.
282 *
283 */
284
285 struct sendlist {
286 const char *name; /* How user refers to it (case independent) */
287 const char *help; /* Help information (0 ==> no help) */
288 int needconnect; /* Need to be connected */
289 int narg; /* Number of arguments */
290 int (*handler)(char *, ...); /* Routine to perform (for special ops) */
291 int nbyte; /* Number of bytes to send this command */
292 int what; /* Character to be sent (<0 ==> special) */
293 };
294 \f
295
296 static int
297 send_esc(void),
298 send_help(void),
299 send_docmd(char *),
300 send_dontcmd(char *),
301 send_willcmd(char *),
302 send_wontcmd(char *);
303
304 static struct sendlist Sendlist[] = {
305 { "ao", "Send Telnet Abort output", 1, 0, NULL, 2, AO },
306 { "ayt", "Send Telnet 'Are You There'", 1, 0, NULL, 2, AYT },
307 { "brk", "Send Telnet Break", 1, 0, NULL, 2, BREAK },
308 { "break", NULL, 1, 0, NULL, 2, BREAK },
309 { "ec", "Send Telnet Erase Character", 1, 0, NULL, 2, EC },
310 { "el", "Send Telnet Erase Line", 1, 0, NULL, 2, EL },
311 { "escape", "Send current escape character",1, 0, (int (*)(char *, ...))send_esc, 1, 0 },
312 { "ga", "Send Telnet 'Go Ahead' sequence", 1, 0, NULL, 2, GA },
313 { "ip", "Send Telnet Interrupt Process",1, 0, NULL, 2, IP },
314 { "intp", NULL, 1, 0, NULL, 2, IP },
315 { "interrupt", NULL, 1, 0, NULL, 2, IP },
316 { "intr", NULL, 1, 0, NULL, 2, IP },
317 { "nop", "Send Telnet 'No operation'", 1, 0, NULL, 2, NOP },
318 { "eor", "Send Telnet 'End of Record'", 1, 0, NULL, 2, EOR },
319 { "abort", "Send Telnet 'Abort Process'", 1, 0, NULL, 2, ABORT },
320 { "susp", "Send Telnet 'Suspend Process'",1, 0, NULL, 2, SUSP },
321 { "eof", "Send Telnet End of File Character", 1, 0, NULL, 2, xEOF },
322 { "synch", "Perform Telnet 'Synch operation'", 1, 0, (int (*)(char *, ...))dosynch, 2, 0 },
323 { "getstatus", "Send request for STATUS", 1, 0, (int (*)(char *, ...))get_status, 6, 0 },
324 { "?", "Display send options", 0, 0, (int (*)(char *, ...))send_help, 0, 0 },
325 { "help", NULL, 0, 0, (int (*)(char *, ...))send_help, 0, 0 },
326 { "do", NULL, 0, 1, (int (*)(char *, ...))send_docmd, 3, 0 },
327 { "dont", NULL, 0, 1, (int (*)(char *, ...))send_dontcmd, 3, 0 },
328 { "will", NULL, 0, 1, (int (*)(char *, ...))send_willcmd, 3, 0 },
329 { "wont", NULL, 0, 1, (int (*)(char *, ...))send_wontcmd, 3, 0 },
330 { NULL, NULL, 0, 0, NULL, 0, 0 }
331 };
332
333 #define GETSEND(name) ((struct sendlist *) genget(name, (char **) Sendlist, \
334 sizeof(struct sendlist)))
335
336 static int
337 sendcmd(int argc, char *argv[])
338 {
339 int count; /* how many bytes we are going to need to send */
340 int i;
341 struct sendlist *s; /* pointer to current command */
342 int success = 0;
343 int needconnect = 0;
344
345 if (argc < 2) {
346 printf("need at least one argument for 'send' command\n");
347 printf("'send ?' for help\n");
348 return 0;
349 }
350 /*
351 * First, validate all the send arguments.
352 * In addition, we see how much space we are going to need, and
353 * whether or not we will be doing a "SYNCH" operation (which
354 * flushes the network queue).
355 */
356 count = 0;
357 for (i = 1; i < argc; i++) {
358 s = GETSEND(argv[i]);
359 if (s == 0) {
360 printf("Unknown send argument '%s'\n'send ?' for help.\n",
361 argv[i]);
362 return 0;
363 } else if (Ambiguous((void *)s)) {
364 printf("Ambiguous send argument '%s'\n'send ?' for help.\n",
365 argv[i]);
366 return 0;
367 }
368 if (i + s->narg >= argc) {
369 fprintf(stderr,
370 "Need %d argument%s to 'send %s' command. 'send %s ?' for help.\n",
371 s->narg, s->narg == 1 ? "" : "s", s->name, s->name);
372 return 0;
373 }
374 count += s->nbyte;
375 if ((void *)s->handler == (void *)send_help) {
376 send_help();
377 return 0;
378 }
379
380 i += s->narg;
381 needconnect += s->needconnect;
382 }
383 if (!connected && needconnect) {
384 printf("?Need to be connected first.\n");
385 printf("'send ?' for help\n");
386 return 0;
387 }
388 /* Now, do we have enough room? */
389 if (NETROOM() < count) {
390 printf("There is not enough room in the buffer TO the network\n");
391 printf("to process your request. Nothing will be done.\n");
392 printf("('send synch' will throw away most data in the network\n");
393 printf("buffer, if this might help.)\n");
394 return 0;
395 }
396 /* OK, they are all OK, now go through again and actually send */
397 count = 0;
398 for (i = 1; i < argc; i++) {
399 if ((s = GETSEND(argv[i])) == 0) {
400 fprintf(stderr, "Telnet 'send' error - argument disappeared!\n");
401 quit();
402 /*NOTREACHED*/
403 }
404 if (s->handler) {
405 count++;
406 success += (*s->handler)((s->narg > 0) ? argv[i+1] : 0,
407 (s->narg > 1) ? argv[i+2] : 0);
408 i += s->narg;
409 } else {
410 NET2ADD(IAC, s->what);
411 printoption("SENT", IAC, s->what);
412 }
413 }
414 return (count == success);
415 }
416
417 static int
418 send_esc(void)
419 {
420 NETADD(escape);
421 return 1;
422 }
423
424 static int
425 send_docmd(char *name)
426 {
427 return(send_tncmd(send_do, "do", name));
428 }
429
430 static int
431 send_dontcmd(name)
432 char *name;
433 {
434 return(send_tncmd(send_dont, "dont", name));
435 }
436
437 static int
438 send_willcmd(char *name)
439 {
440 return(send_tncmd(send_will, "will", name));
441 }
442
443 static int
444 send_wontcmd(char *name)
445 {
446 return(send_tncmd(send_wont, "wont", name));
447 }
448
449 static int
450 send_tncmd(void (*func)(int, int), const char *cmd, char *name)
451 {
452 char **cpp;
453 extern char *telopts[];
454 int val = 0;
455
456 if (isprefix(name, "help") || isprefix(name, "?")) {
457 int col, len;
458
459 printf("usage: send %s <value|option>\n", cmd);
460 printf("\"value\" must be from 0 to 255\n");
461 printf("Valid options are:\n\t");
462
463 col = 8;
464 for (cpp = telopts; *cpp; cpp++) {
465 len = strlen(*cpp) + 3;
466 if (col + len > 65) {
467 printf("\n\t");
468 col = 8;
469 }
470 printf(" \"%s\"", *cpp);
471 col += len;
472 }
473 printf("\n");
474 return 0;
475 }
476 cpp = (char **)genget(name, telopts, sizeof(char *));
477 if (Ambiguous(cpp)) {
478 fprintf(stderr,"'%s': ambiguous argument ('send %s ?' for help).\n",
479 name, cmd);
480 return 0;
481 }
482 if (cpp) {
483 val = cpp - telopts;
484 } else {
485 char *cp = name;
486
487 while (*cp >= '0' && *cp <= '9') {
488 val *= 10;
489 val += *cp - '0';
490 cp++;
491 }
492 if (*cp != 0) {
493 fprintf(stderr, "'%s': unknown argument ('send %s ?' for help).\n",
494 name, cmd);
495 return 0;
496 } else if (val < 0 || val > 255) {
497 fprintf(stderr, "'%s': bad value ('send %s ?' for help).\n",
498 name, cmd);
499 return 0;
500 }
501 }
502 if (!connected) {
503 printf("?Need to be connected first.\n");
504 return 0;
505 }
506 (*func)(val, 1);
507 return 1;
508 }
509
510 static int
511 send_help(void)
512 {
513 struct sendlist *s; /* pointer to current command */
514 for (s = Sendlist; s->name; s++) {
515 if (s->help)
516 printf("%-15s %s\n", s->name, s->help);
517 }
518 return(0);
519 }
520 \f
521 /*
522 * The following are the routines and data structures referred
523 * to by the arguments to the "toggle" command.
524 */
525
526 static int
527 lclchars(void)
528 {
529 donelclchars = 1;
530 return 1;
531 }
532
533 static int
534 togdebug(void)
535 {
536 #ifndef NOT43
537 if (net > 0 &&
538 (SetSockOpt(net, SOL_SOCKET, SO_DEBUG, telnet_debug)) < 0) {
539 perror("setsockopt (SO_DEBUG)");
540 }
541 #else /* NOT43 */
542 if (telnet_debug) {
543 if (net > 0 && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 1) < 0)
544 perror("setsockopt (SO_DEBUG)");
545 } else
546 printf("Cannot turn off socket debugging\n");
547 #endif /* NOT43 */
548 return 1;
549 }
550
551
552 static int
553 togcrlf(void)
554 {
555 if (crlf) {
556 printf("Will send carriage returns as telnet <CR><LF>.\n");
557 } else {
558 printf("Will send carriage returns as telnet <CR><NUL>.\n");
559 }
560 return 1;
561 }
562
563 int binmode;
564
565 static int
566 togbinary(int val)
567 {
568 donebinarytoggle = 1;
569
570 if (val >= 0) {
571 binmode = val;
572 } else {
573 if (my_want_state_is_will(TELOPT_BINARY) &&
574 my_want_state_is_do(TELOPT_BINARY)) {
575 binmode = 1;
576 } else if (my_want_state_is_wont(TELOPT_BINARY) &&
577 my_want_state_is_dont(TELOPT_BINARY)) {
578 binmode = 0;
579 }
580 val = binmode ? 0 : 1;
581 }
582
583 if (val == 1) {
584 if (my_want_state_is_will(TELOPT_BINARY) &&
585 my_want_state_is_do(TELOPT_BINARY)) {
586 printf("Already operating in binary mode with remote host.\n");
587 } else {
588 printf("Negotiating binary mode with remote host.\n");
589 tel_enter_binary(3);
590 }
591 } else {
592 if (my_want_state_is_wont(TELOPT_BINARY) &&
593 my_want_state_is_dont(TELOPT_BINARY)) {
594 printf("Already in network ascii mode with remote host.\n");
595 } else {
596 printf("Negotiating network ascii mode with remote host.\n");
597 tel_leave_binary(3);
598 }
599 }
600 return 1;
601 }
602
603 static int
604 togrbinary(int val)
605 {
606 donebinarytoggle = 1;
607
608 if (val == -1)
609 val = my_want_state_is_do(TELOPT_BINARY) ? 0 : 1;
610
611 if (val == 1) {
612 if (my_want_state_is_do(TELOPT_BINARY)) {
613 printf("Already receiving in binary mode.\n");
614 } else {
615 printf("Negotiating binary mode on input.\n");
616 tel_enter_binary(1);
617 }
618 } else {
619 if (my_want_state_is_dont(TELOPT_BINARY)) {
620 printf("Already receiving in network ascii mode.\n");
621 } else {
622 printf("Negotiating network ascii mode on input.\n");
623 tel_leave_binary(1);
624 }
625 }
626 return 1;
627 }
628
629 static int
630 togxbinary(int val)
631 {
632 donebinarytoggle = 1;
633
634 if (val == -1)
635 val = my_want_state_is_will(TELOPT_BINARY) ? 0 : 1;
636
637 if (val == 1) {
638 if (my_want_state_is_will(TELOPT_BINARY)) {
639 printf("Already transmitting in binary mode.\n");
640 } else {
641 printf("Negotiating binary mode on output.\n");
642 tel_enter_binary(2);
643 }
644 } else {
645 if (my_want_state_is_wont(TELOPT_BINARY)) {
646 printf("Already transmitting in network ascii mode.\n");
647 } else {
648 printf("Negotiating network ascii mode on output.\n");
649 tel_leave_binary(2);
650 }
651 }
652 return 1;
653 }
654
655 struct togglelist {
656 const char *name; /* name of toggle */
657 const char *help; /* help message */
658 int (*handler)(int); /* routine to do actual setting */
659 int *variable;
660 const char *actionexplanation;
661 };
662
663 static struct togglelist Togglelist[] = {
664 { "autoflush",
665 "flushing of output when sending interrupt characters",
666 0,
667 &autoflush,
668 "flush output when sending interrupt characters" },
669 { "autosynch",
670 "automatic sending of interrupt characters in urgent mode",
671 0,
672 &autosynch,
673 "send interrupt characters in urgent mode" },
674 #ifdef AUTHENTICATION
675 { "autologin",
676 "automatic sending of login and/or authentication info",
677 0,
678 &autologin,
679 "send login name and/or authentication information" },
680 { "authdebug",
681 "Toggle authentication debugging",
682 auth_togdebug,
683 0,
684 "print authentication debugging information" },
685 #endif
686 #ifdef ENCRYPTION
687 { "autoencrypt",
688 "automatic encryption of data stream",
689 EncryptAutoEnc,
690 0,
691 "automatically encrypt output" },
692 { "autodecrypt",
693 "automatic decryption of data stream",
694 EncryptAutoDec,
695 0,
696 "automatically decrypt input" },
697 { "verbose_encrypt",
698 "Toggle verbose encryption output",
699 EncryptVerbose,
700 0,
701 "print verbose encryption output" },
702 { "encdebug",
703 "Toggle encryption debugging",
704 EncryptDebug,
705 0,
706 "print encryption debugging information" },
707 #endif /* ENCRYPTION */
708 { "skiprc",
709 "don't read ~/.telnetrc file",
710 0,
711 &skiprc,
712 "skip reading of ~/.telnetrc file" },
713 { "binary",
714 "sending and receiving of binary data",
715 togbinary,
716 0,
717 0 },
718 { "inbinary",
719 "receiving of binary data",
720 togrbinary,
721 0,
722 0 },
723 { "outbinary",
724 "sending of binary data",
725 togxbinary,
726 0,
727 0 },
728 { "crlf",
729 "sending carriage returns as telnet <CR><LF>",
730 (int (*)(int))togcrlf,
731 &crlf,
732 0 },
733 { "crmod",
734 "mapping of received carriage returns",
735 0,
736 &crmod,
737 "map carriage return on output" },
738 { "localchars",
739 "local recognition of certain control characters",
740 (int (*)(int))lclchars,
741 &localchars,
742 "recognize certain control characters" },
743 { " ", "", NULL, NULL, NULL }, /* empty line */
744 { "debug",
745 "debugging",
746 (int (*)(int))togdebug,
747 &telnet_debug,
748 "turn on socket level debugging" },
749 { "netdata",
750 "printing of hexadecimal network data (debugging)",
751 0,
752 &netdata,
753 "print hexadecimal representation of network traffic" },
754 { "prettydump",
755 "output of \"netdata\" to user readable format (debugging)",
756 0,
757 &prettydump,
758 "print user readable output for \"netdata\"" },
759 { "options",
760 "viewing of options processing (debugging)",
761 0,
762 &showoptions,
763 "show option processing" },
764 { "termdata",
765 "(debugging) toggle printing of hexadecimal terminal data",
766 0,
767 &termdata,
768 "print hexadecimal representation of terminal traffic" },
769 { "?",
770 NULL,
771 (int (*)(int))togglehelp,
772 NULL,
773 NULL },
774 { NULL, NULL, NULL, NULL, NULL },
775 { "help",
776 NULL,
777 (int (*)(int))togglehelp,
778 NULL,
779 NULL },
780 { NULL, NULL, NULL, NULL, NULL }
781 };
782
783 static int
784 togglehelp(void)
785 {
786 struct togglelist *c;
787
788 for (c = Togglelist; c->name; c++) {
789 if (c->help) {
790 if (*c->help)
791 printf("%-15s toggle %s\n", c->name, c->help);
792 else
793 printf("\n");
794 }
795 }
796 printf("\n");
797 printf("%-15s %s\n", "?", "display help information");
798 return 0;
799 }
800
801 static void
802 settogglehelp(int set)
803 {
804 struct togglelist *c;
805
806 for (c = Togglelist; c->name; c++) {
807 if (c->help) {
808 if (*c->help)
809 printf("%-15s %s %s\n", c->name, set ? "enable" : "disable",
810 c->help);
811 else
812 printf("\n");
813 }
814 }
815 }
816
817 #define GETTOGGLE(name) (struct togglelist *) \
818 genget(name, (char **) Togglelist, sizeof(struct togglelist))
819
820 static int
821 toggle(int argc, char *argv[])
822 {
823 int retval = 1;
824 char *name;
825 struct togglelist *c;
826
827 if (argc < 2) {
828 fprintf(stderr,
829 "Need an argument to 'toggle' command. 'toggle ?' for help.\n");
830 return 0;
831 }
832 argc--;
833 argv++;
834 while (argc--) {
835 name = *argv++;
836 c = GETTOGGLE(name);
837 if (Ambiguous((void *)c)) {
838 fprintf(stderr, "'%s': ambiguous argument ('toggle ?' for help).\n",
839 name);
840 return 0;
841 } else if (c == 0) {
842 fprintf(stderr, "'%s': unknown argument ('toggle ?' for help).\n",
843 name);
844 return 0;
845 } else {
846 if (c->variable) {
847 *c->variable = !*c->variable; /* invert it */
848 if (c->actionexplanation) {
849 printf("%s %s.\n", *c->variable? "Will" : "Won't",
850 c->actionexplanation);
851 }
852 }
853 if (c->handler) {
854 retval &= (*c->handler)(-1);
855 }
856 }
857 }
858 return retval;
859 }
860 \f
861 /*
862 * The following perform the "set" command.
863 */
864
865 #ifdef USE_TERMIO
866 struct termio new_tc;
867 #endif
868
869 struct setlist {
870 const char *name; /* name */
871 const char *help; /* help information */
872 void (*handler)(char *);
873 cc_t *charp; /* where it is located at */
874 };
875
876 static struct setlist Setlist[] = {
877 #ifdef KLUDGELINEMODE
878 { "echo", "character to toggle local echoing on/off", NULL, &echoc },
879 #endif
880 { "escape", "character to escape back to telnet command mode", NULL, &escape },
881 { "rlogin", "rlogin escape character", 0, &rlogin },
882 { "tracefile", "file to write trace information to", SetNetTrace, (cc_t *)NetTraceFile},
883 { " ", "", NULL, NULL },
884 { " ", "The following need 'localchars' to be toggled true", NULL, NULL },
885 { "flushoutput", "character to cause an Abort Output", NULL, termFlushCharp },
886 { "interrupt", "character to cause an Interrupt Process", NULL, termIntCharp },
887 { "quit", "character to cause an Abort process", NULL, termQuitCharp },
888 { "eof", "character to cause an EOF ", NULL, termEofCharp },
889 { " ", "", NULL, NULL },
890 { " ", "The following are for local editing in linemode", NULL, NULL },
891 { "erase", "character to use to erase a character", NULL, termEraseCharp },
892 { "kill", "character to use to erase a line", NULL, termKillCharp },
893 { "lnext", "character to use for literal next", NULL, termLiteralNextCharp },
894 { "susp", "character to cause a Suspend Process", NULL, termSuspCharp },
895 { "reprint", "character to use for line reprint", NULL, termRprntCharp },
896 { "worderase", "character to use to erase a word", NULL, termWerasCharp },
897 { "start", "character to use for XON", NULL, termStartCharp },
898 { "stop", "character to use for XOFF", NULL, termStopCharp },
899 { "forw1", "alternate end of line character", NULL, termForw1Charp },
900 { "forw2", "alternate end of line character", NULL, termForw2Charp },
901 { "ayt", "alternate AYT character", NULL, termAytCharp },
902 { NULL, NULL, NULL, NULL }
903 };
904
905 static struct setlist *
906 getset(char *name)
907 {
908 return (struct setlist *)
909 genget(name, (char **) Setlist, sizeof(struct setlist));
910 }
911
912 void
913 set_escape_char(char *s)
914 {
915 if (rlogin != _POSIX_VDISABLE) {
916 rlogin = (s && *s) ? special(s) : _POSIX_VDISABLE;
917 printf("Telnet rlogin escape character is '%s'.\n",
918 control(rlogin));
919 } else {
920 escape = (s && *s) ? special(s) : _POSIX_VDISABLE;
921 printf("Telnet escape character is '%s'.\n", control(escape));
922 }
923 }
924
925 static int
926 setcmd(int argc, char *argv[])
927 {
928 int value;
929 struct setlist *ct;
930 struct togglelist *c;
931
932 if (argc < 2 || argc > 3) {
933 printf("Format is 'set Name Value'\n'set ?' for help.\n");
934 return 0;
935 }
936 if ((argc == 2) && (isprefix(argv[1], "?") || isprefix(argv[1], "help"))) {
937 for (ct = Setlist; ct->name; ct++)
938 printf("%-15s %s\n", ct->name, ct->help);
939 printf("\n");
940 settogglehelp(1);
941 printf("%-15s %s\n", "?", "display help information");
942 return 0;
943 }
944
945 ct = getset(argv[1]);
946 if (ct == 0) {
947 c = GETTOGGLE(argv[1]);
948 if (c == 0) {
949 fprintf(stderr, "'%s': unknown argument ('set ?' for help).\n",
950 argv[1]);
951 return 0;
952 } else if (Ambiguous((void *)c)) {
953 fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n",
954 argv[1]);
955 return 0;
956 }
957 if (c->variable) {
958 if ((argc == 2) || (strcmp("on", argv[2]) == 0))
959 *c->variable = 1;
960 else if (strcmp("off", argv[2]) == 0)
961 *c->variable = 0;
962 else {
963 printf("Format is 'set togglename [on|off]'\n'set ?' for help.\n");
964 return 0;
965 }
966 if (c->actionexplanation) {
967 printf("%s %s.\n", *c->variable? "Will" : "Won't",
968 c->actionexplanation);
969 }
970 }
971 if (c->handler)
972 (*c->handler)(1);
973 } else if (argc != 3) {
974 printf("Format is 'set Name Value'\n'set ?' for help.\n");
975 return 0;
976 } else if (Ambiguous((void *)ct)) {
977 fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n",
978 argv[1]);
979 return 0;
980 } else if (ct->handler) {
981 (*ct->handler)(argv[2]);
982 printf("%s set to \"%s\".\n", ct->name, (char *)ct->charp);
983 } else {
984 if (strcmp("off", argv[2])) {
985 value = special(argv[2]);
986 } else {
987 value = _POSIX_VDISABLE;
988 }
989 *(ct->charp) = (cc_t)value;
990 printf("%s character is '%s'.\n", ct->name, control(*(ct->charp)));
991 }
992 slc_check();
993 return 1;
994 }
995
996 static int
997 unsetcmd(int argc, char *argv[])
998 {
999 struct setlist *ct;
1000 struct togglelist *c;
1001 char *name;
1002
1003 if (argc < 2) {
1004 fprintf(stderr,
1005 "Need an argument to 'unset' command. 'unset ?' for help.\n");
1006 return 0;
1007 }
1008 if (isprefix(argv[1], "?") || isprefix(argv[1], "help")) {
1009 for (ct = Setlist; ct->name; ct++)
1010 printf("%-15s %s\n", ct->name, ct->help);
1011 printf("\n");
1012 settogglehelp(0);
1013 printf("%-15s %s\n", "?", "display help information");
1014 return 0;
1015 }
1016
1017 argc--;
1018 argv++;
1019 while (argc--) {
1020 name = *argv++;
1021 ct = getset(name);
1022 if (ct == 0) {
1023 c = GETTOGGLE(name);
1024 if (c == 0) {
1025 fprintf(stderr, "'%s': unknown argument ('unset ?' for help).\n",
1026 name);
1027 return 0;
1028 } else if (Ambiguous((void *)c)) {
1029 fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\n",
1030 name);
1031 return 0;
1032 }
1033 if (c->variable) {
1034 *c->variable = 0;
1035 if (c->actionexplanation) {
1036 printf("%s %s.\n", *c->variable? "Will" : "Won't",
1037 c->actionexplanation);
1038 }
1039 }
1040 if (c->handler)
1041 (*c->handler)(0);
1042 } else if (Ambiguous((void *)ct)) {
1043 fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\n",
1044 name);
1045 return 0;
1046 } else if (ct->handler) {
1047 (*ct->handler)(0);
1048 printf("%s reset to \"%s\".\n", ct->name, (char *)ct->charp);
1049 } else {
1050 *(ct->charp) = _POSIX_VDISABLE;
1051 printf("%s character is '%s'.\n", ct->name, control(*(ct->charp)));
1052 }
1053 }
1054 return 1;
1055 }
1056 \f
1057 /*
1058 * The following are the data structures and routines for the
1059 * 'mode' command.
1060 */
1061 #ifdef KLUDGELINEMODE
1062 extern int kludgelinemode;
1063
1064 static int
1065 dokludgemode(void)
1066 {
1067 kludgelinemode = 1;
1068 send_wont(TELOPT_LINEMODE, 1);
1069 send_dont(TELOPT_SGA, 1);
1070 send_dont(TELOPT_ECHO, 1);
1071 return 1;
1072 }
1073 #endif
1074
1075 static int
1076 dolinemode(void)
1077 {
1078 #ifdef KLUDGELINEMODE
1079 if (kludgelinemode)
1080 send_dont(TELOPT_SGA, 1);
1081 #endif
1082 send_will(TELOPT_LINEMODE, 1);
1083 send_dont(TELOPT_ECHO, 1);
1084 return 1;
1085 }
1086
1087 static int
1088 docharmode(void)
1089 {
1090 #ifdef KLUDGELINEMODE
1091 if (kludgelinemode)
1092 send_do(TELOPT_SGA, 1);
1093 else
1094 #endif
1095 send_wont(TELOPT_LINEMODE, 1);
1096 send_do(TELOPT_ECHO, 1);
1097 return 1;
1098 }
1099
1100 static int
1101 dolmmode(int bit, int on)
1102 {
1103 unsigned char c;
1104 extern int linemode;
1105
1106 if (my_want_state_is_wont(TELOPT_LINEMODE)) {
1107 printf("?Need to have LINEMODE option enabled first.\n");
1108 printf("'mode ?' for help.\n");
1109 return 0;
1110 }
1111
1112 if (on)
1113 c = (linemode | bit);
1114 else
1115 c = (linemode & ~bit);
1116 lm_mode(&c, 1, 1);
1117 return 1;
1118 }
1119
1120 static int
1121 setmod(int bit)
1122 {
1123 return dolmmode(bit, 1);
1124 }
1125
1126 static int
1127 clearmode(int bit)
1128 {
1129 return dolmmode(bit, 0);
1130 }
1131
1132 struct modelist {
1133 const char *name; /* command name */
1134 const char *help; /* help string */
1135 int (*handler)(int);/* routine which executes command */
1136 int needconnect; /* Do we need to be connected to execute? */
1137 int arg1;
1138 };
1139
1140 static struct modelist ModeList[] = {
1141 { "character", "Disable LINEMODE option", (int (*)(int))docharmode, 1, 0 },
1142 #ifdef KLUDGELINEMODE
1143 { "", "(or disable obsolete line-by-line mode)", NULL, 0, 0 },
1144 #endif
1145 { "line", "Enable LINEMODE option", (int (*)(int))dolinemode, 1, 0 },
1146 #ifdef KLUDGELINEMODE
1147 { "", "(or enable obsolete line-by-line mode)", NULL, 0, 0 },
1148 #endif
1149 { "", "", NULL, 0, 0 },
1150 { "", "These require the LINEMODE option to be enabled", NULL, 0, 0 },
1151 { "isig", "Enable signal trapping", setmod, 1, MODE_TRAPSIG },
1152 { "+isig", 0, setmod, 1, MODE_TRAPSIG },
1153 { "-isig", "Disable signal trapping", clearmode, 1, MODE_TRAPSIG },
1154 { "edit", "Enable character editing", setmod, 1, MODE_EDIT },
1155 { "+edit", 0, setmod, 1, MODE_EDIT },
1156 { "-edit", "Disable character editing", clearmode, 1, MODE_EDIT },
1157 { "softtabs", "Enable tab expansion", setmod, 1, MODE_SOFT_TAB },
1158 { "+softtabs", 0, setmod, 1, MODE_SOFT_TAB },
1159 { "-softtabs", "Disable character editing", clearmode, 1, MODE_SOFT_TAB },
1160 { "litecho", "Enable literal character echo", setmod, 1, MODE_LIT_ECHO },
1161 { "+litecho", 0, setmod, 1, MODE_LIT_ECHO },
1162 { "-litecho", "Disable literal character echo", clearmode, 1, MODE_LIT_ECHO },
1163 { "help", 0, (int (*)(int))modehelp, 0, 0 },
1164 #ifdef KLUDGELINEMODE
1165 { "kludgeline", 0, (int (*)(int))dokludgemode, 1, 0 },
1166 #endif
1167 { "", "", NULL, 0, 0 },
1168 { "?", "Print help information", (int (*)(int))modehelp, 0, 0 },
1169 { NULL, NULL, NULL, 0, 0 },
1170 };
1171
1172
1173 static int
1174 modehelp(void)
1175 {
1176 struct modelist *mt;
1177
1178 printf("format is: 'mode Mode', where 'Mode' is one of:\n\n");
1179 for (mt = ModeList; mt->name; mt++) {
1180 if (mt->help) {
1181 if (*mt->help)
1182 printf("%-15s %s\n", mt->name, mt->help);
1183 else
1184 printf("\n");
1185 }
1186 }
1187 return 0;
1188 }
1189
1190 #define GETMODECMD(name) (struct modelist *) \
1191 genget(name, (char **) ModeList, sizeof(struct modelist))
1192
1193 static int
1194 modecmd(int argc, char *argv[])
1195 {
1196 struct modelist *mt;
1197
1198 if (argc != 2) {
1199 printf("'mode' command requires an argument\n");
1200 printf("'mode ?' for help.\n");
1201 } else if ((mt = GETMODECMD(argv[1])) == 0) {
1202 fprintf(stderr, "Unknown mode '%s' ('mode ?' for help).\n", argv[1]);
1203 } else if (Ambiguous((void *)mt)) {
1204 fprintf(stderr, "Ambiguous mode '%s' ('mode ?' for help).\n", argv[1]);
1205 } else if (mt->needconnect && !connected) {
1206 printf("?Need to be connected first.\n");
1207 printf("'mode ?' for help.\n");
1208 } else if (mt->handler) {
1209 return (*mt->handler)(mt->arg1);
1210 }
1211 return 0;
1212 }
1213 \f
1214 /*
1215 * The following data structures and routines implement the
1216 * "display" command.
1217 */
1218
1219 static int
1220 display(int argc, char *argv[])
1221 {
1222 struct togglelist *tl;
1223 struct setlist *sl;
1224
1225 #define dotog(tl) if (tl->variable && tl->actionexplanation) { \
1226 if (*tl->variable) { \
1227 printf("will"); \
1228 } else { \
1229 printf("won't"); \
1230 } \
1231 printf(" %s.\n", tl->actionexplanation); \
1232 }
1233
1234 #define doset(sl) if (sl->name && *sl->name != ' ') { \
1235 if (sl->handler == 0) \
1236 printf("%-15s [%s]\n", sl->name, control(*sl->charp)); \
1237 else \
1238 printf("%-15s \"%s\"\n", sl->name, (char *)sl->charp); \
1239 }
1240
1241 if (argc == 1) {
1242 for (tl = Togglelist; tl->name; tl++) {
1243 dotog(tl);
1244 }
1245 printf("\n");
1246 for (sl = Setlist; sl->name; sl++) {
1247 doset(sl);
1248 }
1249 } else {
1250 int i;
1251
1252 for (i = 1; i < argc; i++) {
1253 sl = getset(argv[i]);
1254 tl = GETTOGGLE(argv[i]);
1255 if (Ambiguous((void *)sl) || Ambiguous((void *)tl)) {
1256 printf("?Ambiguous argument '%s'.\n", argv[i]);
1257 return 0;
1258 } else if (!sl && !tl) {
1259 printf("?Unknown argument '%s'.\n", argv[i]);
1260 return 0;
1261 } else {
1262 if (tl) {
1263 dotog(tl);
1264 }
1265 if (sl) {
1266 doset(sl);
1267 }
1268 }
1269 }
1270 }
1271 /*@*/optionstatus();
1272 #ifdef ENCRYPTION
1273 EncryptStatus();
1274 #endif /* ENCRYPTION */
1275 return 1;
1276 #undef doset
1277 #undef dotog
1278 }
1279 \f
1280 /*
1281 * The following are the data structures, and many of the routines,
1282 * relating to command processing.
1283 */
1284
1285 /*
1286 * Set the escape character.
1287 */
1288 static int
1289 setescape(int argc, char *argv[])
1290 {
1291 char *arg;
1292 char buf[50];
1293
1294 printf(
1295 "Deprecated usage - please use 'set escape%s%s' in the future.\n",
1296 (argc > 2)? " ":"", (argc > 2)? argv[1]: "");
1297 if (argc > 2)
1298 arg = argv[1];
1299 else {
1300 printf("new escape character: ");
1301 (void) fgets(buf, sizeof(buf), stdin);
1302 arg = buf;
1303 }
1304 if (arg[0] != '\0')
1305 escape = arg[0];
1306 (void) fflush(stdout);
1307 return 1;
1308 }
1309
1310 static int
1311 togcrmod(void)
1312 {
1313 crmod = !crmod;
1314 printf("Deprecated usage - please use 'toggle crmod' in the future.\n");
1315 printf("%s map carriage return on output.\n", crmod ? "Will" : "Won't");
1316 (void) fflush(stdout);
1317 return 1;
1318 }
1319
1320 static int
1321 suspend(void)
1322 {
1323 #ifdef SIGTSTP
1324 setcommandmode();
1325 {
1326 long oldrows, oldcols, newrows, newcols, err_;
1327
1328 err_ = (TerminalWindowSize(&oldrows, &oldcols) == 0) ? 1 : 0;
1329 (void) kill(0, SIGTSTP);
1330 /*
1331 * If we didn't get the window size before the SUSPEND, but we
1332 * can get them now (?), then send the NAWS to make sure that
1333 * we are set up for the right window size.
1334 */
1335 if (TerminalWindowSize(&newrows, &newcols) && connected &&
1336 (err_ || ((oldrows != newrows) || (oldcols != newcols)))) {
1337 sendnaws();
1338 }
1339 }
1340 /* reget parameters in case they were changed */
1341 TerminalSaveState();
1342 setconnmode(0);
1343 #else
1344 printf("Suspend is not supported. Try the '!' command instead\n");
1345 #endif
1346 return 1;
1347 }
1348
1349 static int
1350 shell(int argc, char *argv[] __unused)
1351 {
1352 long oldrows, oldcols, newrows, newcols, err_;
1353
1354 setcommandmode();
1355
1356 err_ = (TerminalWindowSize(&oldrows, &oldcols) == 0) ? 1 : 0;
1357 switch(vfork()) {
1358 case -1:
1359 perror("Fork failed\n");
1360 break;
1361
1362 case 0:
1363 {
1364 /*
1365 * Fire up the shell in the child.
1366 */
1367 const char *shellp, *shellname;
1368
1369 shellp = getenv("SHELL");
1370 if (shellp == NULL)
1371 shellp = "/bin/sh";
1372 if ((shellname = strrchr(shellp, '/')) == 0)
1373 shellname = shellp;
1374 else
1375 shellname++;
1376 if (argc > 1)
1377 execl(shellp, shellname, "-c", &saveline[1], (char *)0);
1378 else
1379 execl(shellp, shellname, (char *)0);
1380 perror("Execl");
1381 _exit(1);
1382 }
1383 default:
1384 (void)wait((int *)0); /* Wait for the shell to complete */
1385
1386 if (TerminalWindowSize(&newrows, &newcols) && connected &&
1387 (err_ || ((oldrows != newrows) || (oldcols != newcols)))) {
1388 sendnaws();
1389 }
1390 break;
1391 }
1392 return 1;
1393 }
1394
1395 static int
1396 bye(int argc, char *argv[])
1397 {
1398 extern int resettermname;
1399
1400 if (connected) {
1401 (void) shutdown(net, 2);
1402 printf("Connection closed.\n");
1403 (void) NetClose(net);
1404 connected = 0;
1405 resettermname = 1;
1406 #ifdef AUTHENTICATION
1407 #ifdef ENCRYPTION
1408 auth_encrypt_connect(connected);
1409 #endif
1410 #endif
1411 /* reset options */
1412 tninit();
1413 }
1414 if ((argc != 2) || (strcmp(argv[1], "fromquit") != 0)) {
1415 longjmp(toplevel, 1);
1416 /* NOTREACHED */
1417 }
1418 return 1; /* Keep lint, etc., happy */
1419 }
1420
1421 void
1422 quit(void)
1423 {
1424 (void) call(bye, "bye", "fromquit", 0);
1425 Exit(0);
1426 }
1427
1428 static int
1429 logout(void)
1430 {
1431 send_do(TELOPT_LOGOUT, 1);
1432 (void) netflush();
1433 return 1;
1434 }
1435
1436 \f
1437 /*
1438 * The SLC command.
1439 */
1440
1441 struct slclist {
1442 const char *name;
1443 const char *help;
1444 void (*handler)(int);
1445 int arg;
1446 };
1447
1448 static void slc_help(void);
1449
1450 struct slclist SlcList[] = {
1451 { "export", "Use local special character definitions",
1452 (void (*)(int))slc_mode_export, 0 },
1453 { "import", "Use remote special character definitions",
1454 slc_mode_import, 1 },
1455 { "check", "Verify remote special character definitions",
1456 slc_mode_import, 0 },
1457 { "help", NULL, (void (*)(int))slc_help, 0 },
1458 { "?", "Print help information", (void (*)(int))slc_help, 0 },
1459 { NULL, NULL, NULL, 0 },
1460 };
1461
1462 static void
1463 slc_help(void)
1464 {
1465 struct slclist *c;
1466
1467 for (c = SlcList; c->name; c++) {
1468 if (c->help) {
1469 if (*c->help)
1470 printf("%-15s %s\n", c->name, c->help);
1471 else
1472 printf("\n");
1473 }
1474 }
1475 }
1476
1477 static struct slclist *
1478 getslc(char *name)
1479 {
1480 return (struct slclist *)
1481 genget(name, (char **) SlcList, sizeof(struct slclist));
1482 }
1483
1484 static int
1485 slccmd(int argc, char *argv[])
1486 {
1487 struct slclist *c;
1488
1489 if (argc != 2) {
1490 fprintf(stderr,
1491 "Need an argument to 'slc' command. 'slc ?' for help.\n");
1492 return 0;
1493 }
1494 c = getslc(argv[1]);
1495 if (c == 0) {
1496 fprintf(stderr, "'%s': unknown argument ('slc ?' for help).\n",
1497 argv[1]);
1498 return 0;
1499 }
1500 if (Ambiguous((void *)c)) {
1501 fprintf(stderr, "'%s': ambiguous argument ('slc ?' for help).\n",
1502 argv[1]);
1503 return 0;
1504 }
1505 (*c->handler)(c->arg);
1506 slcstate();
1507 return 1;
1508 }
1509 \f
1510 /*
1511 * The ENVIRON command.
1512 */
1513
1514 struct envlist {
1515 const char *name;
1516 const char *help;
1517 void (*handler)(unsigned char *, unsigned char *);
1518 int narg;
1519 };
1520
1521 extern struct env_lst *
1522 env_define(const unsigned char *, unsigned char *);
1523 extern void
1524 env_undefine(unsigned char *),
1525 env_export(const unsigned char *),
1526 env_unexport(const unsigned char *),
1527 env_send(unsigned char *),
1528 #if defined(OLD_ENVIRON) && defined(ENV_HACK)
1529 env_varval(unsigned char *),
1530 #endif
1531 env_list(void);
1532 static void
1533 env_help(void);
1534
1535 struct envlist EnvList[] = {
1536 { "define", "Define an environment variable",
1537 (void (*)(unsigned char *, unsigned char *))env_define, 2 },
1538 { "undefine", "Undefine an environment variable",
1539 (void (*)(unsigned char *, unsigned char *))env_undefine, 1 },
1540 { "export", "Mark an environment variable for automatic export",
1541 (void (*)(unsigned char *, unsigned char *))env_export, 1 },
1542 { "unexport", "Don't mark an environment variable for automatic export",
1543 (void (*)(unsigned char *, unsigned char *))env_unexport, 1 },
1544 { "send", "Send an environment variable", (void (*)(unsigned char *, unsigned char *))env_send, 1 },
1545 { "list", "List the current environment variables",
1546 (void (*)(unsigned char *, unsigned char *))env_list, 0 },
1547 #if defined(OLD_ENVIRON) && defined(ENV_HACK)
1548 { "varval", "Reverse VAR and VALUE (auto, right, wrong, status)",
1549 (void (*)(unsigned char *, unsigned char *))env_varval, 1 },
1550 #endif
1551 { "help", NULL, (void (*)(unsigned char *, unsigned char *))env_help, 0 },
1552 { "?", "Print help information", (void (*)(unsigned char *, unsigned char *))env_help, 0 },
1553 { NULL, NULL, NULL, 0 },
1554 };
1555
1556 static void
1557 env_help(void)
1558 {
1559 struct envlist *c;
1560
1561 for (c = EnvList; c->name; c++) {
1562 if (c->help) {
1563 if (*c->help)
1564 printf("%-15s %s\n", c->name, c->help);
1565 else
1566 printf("\n");
1567 }
1568 }
1569 }
1570
1571 static struct envlist *
1572 getenvcmd(char *name)
1573 {
1574 return (struct envlist *)
1575 genget(name, (char **) EnvList, sizeof(struct envlist));
1576 }
1577
1578 static int
1579 env_cmd(int argc, char *argv[])
1580 {
1581 struct envlist *c;
1582
1583 if (argc < 2) {
1584 fprintf(stderr,
1585 "Need an argument to 'environ' command. 'environ ?' for help.\n");
1586 return 0;
1587 }
1588 c = getenvcmd(argv[1]);
1589 if (c == 0) {
1590 fprintf(stderr, "'%s': unknown argument ('environ ?' for help).\n",
1591 argv[1]);
1592 return 0;
1593 }
1594 if (Ambiguous((void *)c)) {
1595 fprintf(stderr, "'%s': ambiguous argument ('environ ?' for help).\n",
1596 argv[1]);
1597 return 0;
1598 }
1599 if (c->narg + 2 != argc) {
1600 fprintf(stderr,
1601 "Need %s%d argument%s to 'environ %s' command. 'environ ?' for help.\n",
1602 c->narg < argc + 2 ? "only " : "",
1603 c->narg, c->narg == 1 ? "" : "s", c->name);
1604 return 0;
1605 }
1606 (*c->handler)(argv[2], argv[3]);
1607 return 1;
1608 }
1609
1610 struct env_lst {
1611 struct env_lst *next; /* pointer to next structure */
1612 struct env_lst *prev; /* pointer to previous structure */
1613 unsigned char *var; /* pointer to variable name */
1614 unsigned char *value; /* pointer to variable value */
1615 int export; /* 1 -> export with default list of variables */
1616 int welldefined; /* A well defined variable */
1617 };
1618
1619 struct env_lst envlisthead;
1620
1621 static struct env_lst *
1622 env_find(const unsigned char *var)
1623 {
1624 struct env_lst *ep;
1625
1626 for (ep = envlisthead.next; ep; ep = ep->next) {
1627 if (strcmp(ep->var, var) == 0)
1628 return(ep);
1629 }
1630 return(NULL);
1631 }
1632
1633 void
1634 env_init(void)
1635 {
1636 extern char **environ;
1637 char **epp, *cp;
1638 struct env_lst *ep;
1639
1640 for (epp = environ; *epp; epp++) {
1641 if ((cp = strchr(*epp, '='))) {
1642 *cp = '\0';
1643 ep = env_define((unsigned char *)*epp,
1644 (unsigned char *)cp+1);
1645 ep->export = 0;
1646 *cp = '=';
1647 }
1648 }
1649 /*
1650 * Special case for DISPLAY variable. If it is ":0.0" or
1651 * "unix:0.0", we have to get rid of "unix" and insert our
1652 * hostname.
1653 */
1654 if ((ep = env_find("DISPLAY"))
1655 && ((*ep->value == ':')
1656 || (strncmp((char *)ep->value, "unix:", 5) == 0))) {
1657 char hbuf[256+1];
1658 char *cp2 = strchr((char *)ep->value, ':');
1659
1660 gethostname(hbuf, 256);
1661 hbuf[256] = '\0';
1662 cp = (char *)malloc(strlen(hbuf) + strlen(cp2) + 1);
1663 sprintf((char *)cp, "%s%s", hbuf, cp2);
1664 free(ep->value);
1665 ep->value = (unsigned char *)cp;
1666 }
1667 /*
1668 * If USER is not defined, but LOGNAME is, then add
1669 * USER with the value from LOGNAME. By default, we
1670 * don't export the USER variable.
1671 */
1672 if ((env_find("USER") == NULL) && (ep = env_find("LOGNAME"))) {
1673 env_define("USER", ep->value);
1674 env_unexport("USER");
1675 }
1676 env_export("DISPLAY");
1677 env_export("PRINTER");
1678 }
1679
1680 struct env_lst *
1681 env_define(const unsigned char *var, unsigned char *value)
1682 {
1683 struct env_lst *ep;
1684
1685 if ((ep = env_find(var))) {
1686 if (ep->var)
1687 free(ep->var);
1688 if (ep->value)
1689 free(ep->value);
1690 } else {
1691 ep = (struct env_lst *)malloc(sizeof(struct env_lst));
1692 ep->next = envlisthead.next;
1693 envlisthead.next = ep;
1694 ep->prev = &envlisthead;
1695 if (ep->next)
1696 ep->next->prev = ep;
1697 }
1698 ep->welldefined = opt_welldefined(var);
1699 ep->export = 1;
1700 ep->var = strdup(var);
1701 ep->value = strdup(value);
1702 return(ep);
1703 }
1704
1705 void
1706 env_undefine(unsigned char *var)
1707 {
1708 struct env_lst *ep;
1709
1710 if ((ep = env_find(var))) {
1711 ep->prev->next = ep->next;
1712 if (ep->next)
1713 ep->next->prev = ep->prev;
1714 if (ep->var)
1715 free(ep->var);
1716 if (ep->value)
1717 free(ep->value);
1718 free(ep);
1719 }
1720 }
1721
1722 void
1723 env_export(const unsigned char *var)
1724 {
1725 struct env_lst *ep;
1726
1727 if ((ep = env_find(var)))
1728 ep->export = 1;
1729 }
1730
1731 void
1732 env_unexport(const unsigned char *var)
1733 {
1734 struct env_lst *ep;
1735
1736 if ((ep = env_find(var)))
1737 ep->export = 0;
1738 }
1739
1740 void
1741 env_send(unsigned char *var)
1742 {
1743 struct env_lst *ep;
1744
1745 if (my_state_is_wont(TELOPT_NEW_ENVIRON)
1746 #ifdef OLD_ENVIRON
1747 && my_state_is_wont(TELOPT_OLD_ENVIRON)
1748 #endif
1749 ) {
1750 fprintf(stderr,
1751 "Cannot send '%s': Telnet ENVIRON option not enabled\n",
1752 var);
1753 return;
1754 }
1755 ep = env_find(var);
1756 if (ep == 0) {
1757 fprintf(stderr, "Cannot send '%s': variable not defined\n",
1758 var);
1759 return;
1760 }
1761 env_opt_start_info();
1762 env_opt_add(ep->var);
1763 env_opt_end(0);
1764 }
1765
1766 void
1767 env_list(void)
1768 {
1769 struct env_lst *ep;
1770
1771 for (ep = envlisthead.next; ep; ep = ep->next) {
1772 printf("%c %-20s %s\n", ep->export ? '*' : ' ',
1773 ep->var, ep->value);
1774 }
1775 }
1776
1777 unsigned char *
1778 env_default(int init, int welldefined)
1779 {
1780 static struct env_lst *nep = NULL;
1781
1782 if (init) {
1783 nep = &envlisthead;
1784 return(NULL);
1785 }
1786 if (nep) {
1787 while ((nep = nep->next)) {
1788 if (nep->export && (nep->welldefined == welldefined))
1789 return(nep->var);
1790 }
1791 }
1792 return(NULL);
1793 }
1794
1795 unsigned char *
1796 env_getvalue(const unsigned char *var)
1797 {
1798 struct env_lst *ep;
1799
1800 if ((ep = env_find(var)))
1801 return(ep->value);
1802 return(NULL);
1803 }
1804
1805 #if defined(OLD_ENVIRON) && defined(ENV_HACK)
1806 void
1807 env_varval(unsigned char *what)
1808 {
1809 extern int old_env_var, old_env_value, env_auto;
1810 int len = strlen((char *)what);
1811
1812 if (len == 0)
1813 goto unknown;
1814
1815 if (strncasecmp((char *)what, "status", len) == 0) {
1816 if (env_auto)
1817 printf("%s%s", "VAR and VALUE are/will be ",
1818 "determined automatically\n");
1819 if (old_env_var == OLD_ENV_VAR)
1820 printf("VAR and VALUE set to correct definitions\n");
1821 else
1822 printf("VAR and VALUE definitions are reversed\n");
1823 } else if (strncasecmp((char *)what, "auto", len) == 0) {
1824 env_auto = 1;
1825 old_env_var = OLD_ENV_VALUE;
1826 old_env_value = OLD_ENV_VAR;
1827 } else if (strncasecmp((char *)what, "right", len) == 0) {
1828 env_auto = 0;
1829 old_env_var = OLD_ENV_VAR;
1830 old_env_value = OLD_ENV_VALUE;
1831 } else if (strncasecmp((char *)what, "wrong", len) == 0) {
1832 env_auto = 0;
1833 old_env_var = OLD_ENV_VALUE;
1834 old_env_value = OLD_ENV_VAR;
1835 } else {
1836 unknown:
1837 printf("Unknown \"varval\" command. (\"auto\", \"right\", \"wrong\", \"status\")\n");
1838 }
1839 }
1840 #endif
1841
1842 #ifdef AUTHENTICATION
1843 /*
1844 * The AUTHENTICATE command.
1845 */
1846
1847 struct authlist {
1848 const char *name;
1849 const char *help;
1850 int (*handler)(char *);
1851 int narg;
1852 };
1853
1854 extern int
1855 auth_enable(char *),
1856 auth_disable(char *),
1857 auth_status(void);
1858 static int
1859 auth_help(void);
1860
1861 struct authlist AuthList[] = {
1862 { "status", "Display current status of authentication information",
1863 (int (*)(char *))auth_status, 0 },
1864 { "disable", "Disable an authentication type ('auth disable ?' for more)",
1865 auth_disable, 1 },
1866 { "enable", "Enable an authentication type ('auth enable ?' for more)",
1867 auth_enable, 1 },
1868 { "help", NULL, (int (*)(char *))auth_help, 0 },
1869 { "?", "Print help information", (int (*)(char *))auth_help, 0 },
1870 { NULL, NULL, NULL, 0 },
1871 };
1872
1873 static int
1874 auth_help(void)
1875 {
1876 struct authlist *c;
1877
1878 for (c = AuthList; c->name; c++) {
1879 if (c->help) {
1880 if (*c->help)
1881 printf("%-15s %s\n", c->name, c->help);
1882 else
1883 printf("\n");
1884 }
1885 }
1886 return 0;
1887 }
1888
1889 int
1890 auth_cmd(int argc, char *argv[])
1891 {
1892 struct authlist *c;
1893
1894 if (argc < 2) {
1895 fprintf(stderr,
1896 "Need an argument to 'auth' command. 'auth ?' for help.\n");
1897 return 0;
1898 }
1899
1900 c = (struct authlist *)
1901 genget(argv[1], (char **) AuthList, sizeof(struct authlist));
1902 if (c == 0) {
1903 fprintf(stderr, "'%s': unknown argument ('auth ?' for help).\n",
1904 argv[1]);
1905 return 0;
1906 }
1907 if (Ambiguous((void *)c)) {
1908 fprintf(stderr, "'%s': ambiguous argument ('auth ?' for help).\n",
1909 argv[1]);
1910 return 0;
1911 }
1912 if (c->narg + 2 != argc) {
1913 fprintf(stderr,
1914 "Need %s%d argument%s to 'auth %s' command. 'auth ?' for help.\n",
1915 c->narg < argc + 2 ? "only " : "",
1916 c->narg, c->narg == 1 ? "" : "s", c->name);
1917 return 0;
1918 }
1919 return((*c->handler)(argv[2]));
1920 }
1921 #endif
1922
1923 #ifdef ENCRYPTION
1924 /*
1925 * The ENCRYPT command.
1926 */
1927
1928 struct encryptlist {
1929 const char *name;
1930 const char *help;
1931 int (*handler)(char *, char *);
1932 int needconnect;
1933 int minarg;
1934 int maxarg;
1935 };
1936
1937 extern int
1938 EncryptEnable(char *, char *),
1939 EncryptDisable(char *, char *),
1940 EncryptType(char *, char *),
1941 EncryptStart(char *),
1942 EncryptStartInput(void),
1943 EncryptStartOutput(void),
1944 EncryptStop(char *),
1945 EncryptStopInput(void),
1946 EncryptStopOutput(void),
1947 EncryptStatus(void);
1948 static int
1949 EncryptHelp(void);
1950
1951 struct encryptlist EncryptList[] = {
1952 { "enable", "Enable encryption. ('encrypt enable ?' for more)",
1953 EncryptEnable, 1, 1, 2 },
1954 { "disable", "Disable encryption. ('encrypt enable ?' for more)",
1955 EncryptDisable, 0, 1, 2 },
1956 { "type", "Set encryption type. ('encrypt type ?' for more)",
1957 EncryptType, 0, 1, 1 },
1958 { "start", "Start encryption. ('encrypt start ?' for more)",
1959 (int (*)(char *, char *))EncryptStart, 1, 0, 1 },
1960 { "stop", "Stop encryption. ('encrypt stop ?' for more)",
1961 (int (*)(char *, char *))EncryptStop, 1, 0, 1 },
1962 { "input", "Start encrypting the input stream",
1963 (int (*)(char *, char *))EncryptStartInput, 1, 0, 0 },
1964 { "-input", "Stop encrypting the input stream",
1965 (int (*)(char *, char *))EncryptStopInput, 1, 0, 0 },
1966 { "output", "Start encrypting the output stream",
1967 (int (*)(char *, char *))EncryptStartOutput, 1, 0, 0 },
1968 { "-output", "Stop encrypting the output stream",
1969 (int (*)(char *, char *))EncryptStopOutput, 1, 0, 0 },
1970
1971 { "status", "Display current status of authentication information",
1972 (int (*)(char *, char *))EncryptStatus, 0, 0, 0 },
1973 { "help", NULL, (int (*)(char *, char *))EncryptHelp, 0, 0, 0 },
1974 { "?", "Print help information", (int (*)(char *, char *))EncryptHelp, 0, 0, 0 },
1975 { NULL, NULL, NULL, 0, 0, 0 },
1976 };
1977
1978 static int
1979 EncryptHelp(void)
1980 {
1981 struct encryptlist *c;
1982
1983 for (c = EncryptList; c->name; c++) {
1984 if (c->help) {
1985 if (*c->help)
1986 printf("%-15s %s\n", c->name, c->help);
1987 else
1988 printf("\n");
1989 }
1990 }
1991 return 0;
1992 }
1993
1994 static int
1995 encrypt_cmd(int argc, char *argv[])
1996 {
1997 struct encryptlist *c;
1998
1999 if (argc < 2) {
2000 fprintf(stderr,
2001 "Need an argument to 'encrypt' command. 'encrypt ?' for help.\n");
2002 return 0;
2003 }
2004
2005 c = (struct encryptlist *)
2006 genget(argv[1], (char **) EncryptList, sizeof(struct encryptlist));
2007 if (c == 0) {
2008 fprintf(stderr, "'%s': unknown argument ('encrypt ?' for help).\n",
2009 argv[1]);
2010 return 0;
2011 }
2012 if (Ambiguous((void *)c)) {
2013 fprintf(stderr, "'%s': ambiguous argument ('encrypt ?' for help).\n",
2014 argv[1]);
2015 return 0;
2016 }
2017 argc -= 2;
2018 if (argc < c->minarg || argc > c->maxarg) {
2019 if (c->minarg == c->maxarg) {
2020 fprintf(stderr, "Need %s%d argument%s ",
2021 c->minarg < argc ? "only " : "", c->minarg,
2022 c->minarg == 1 ? "" : "s");
2023 } else {
2024 fprintf(stderr, "Need %s%d-%d arguments ",
2025 c->maxarg < argc ? "only " : "", c->minarg, c->maxarg);
2026 }
2027 fprintf(stderr, "to 'encrypt %s' command. 'encrypt ?' for help.\n",
2028 c->name);
2029 return 0;
2030 }
2031 if (c->needconnect && !connected) {
2032 if (!(argc && (isprefix(argv[2], "help") || isprefix(argv[2], "?")))) {
2033 printf("?Need to be connected first.\n");
2034 return 0;
2035 }
2036 }
2037 return ((*c->handler)(argc > 0 ? argv[2] : 0,
2038 argc > 1 ? argv[3] : 0));
2039 }
2040 #endif /* ENCRYPTION */
2041
2042 /*
2043 * Print status about the connection.
2044 */
2045 /*ARGSUSED*/
2046 static int
2047 status(int argc, char *argv[])
2048 {
2049 if (connected) {
2050 printf("Connected to %s.\n", hostname);
2051 if ((argc < 2) || strcmp(argv[1], "notmuch")) {
2052 int mode = getconnmode();
2053
2054 if (my_want_state_is_will(TELOPT_LINEMODE)) {
2055 printf("Operating with LINEMODE option\n");
2056 printf("%s line editing\n", (mode&MODE_EDIT) ? "Local" : "No");
2057 printf("%s catching of signals\n",
2058 (mode&MODE_TRAPSIG) ? "Local" : "No");
2059 slcstate();
2060 #ifdef KLUDGELINEMODE
2061 } else if (kludgelinemode && my_want_state_is_dont(TELOPT_SGA)) {
2062 printf("Operating in obsolete linemode\n");
2063 #endif
2064 } else {
2065 printf("Operating in single character mode\n");
2066 if (localchars)
2067 printf("Catching signals locally\n");
2068 }
2069 printf("%s character echo\n", (mode&MODE_ECHO) ? "Local" : "Remote");
2070 if (my_want_state_is_will(TELOPT_LFLOW))
2071 printf("%s flow control\n", (mode&MODE_FLOW) ? "Local" : "No");
2072 #ifdef ENCRYPTION
2073 encrypt_display();
2074 #endif /* ENCRYPTION */
2075 }
2076 } else {
2077 printf("No connection.\n");
2078 }
2079 printf("Escape character is '%s'.\n", control(escape));
2080 (void) fflush(stdout);
2081 return 1;
2082 }
2083
2084 #ifdef SIGINFO
2085 /*
2086 * Function that gets called when SIGINFO is received.
2087 */
2088 void
2089 ayt_status(void)
2090 {
2091 (void) call(status, "status", "notmuch", 0);
2092 }
2093 #endif
2094
2095 static const char *
2096 sockaddr_ntop(struct sockaddr *sa)
2097 {
2098 void *addr;
2099 #ifndef INET6_ADDRSTRLEN
2100 # define INET6_ADDRSTRLEN 256
2101 #endif
2102 static char addrbuf[INET6_ADDRSTRLEN];
2103
2104 switch (sa->sa_family) {
2105 case AF_INET:
2106 addr = &((struct sockaddr_in *)sa)->sin_addr;
2107 break;
2108 case AF_UNIX:
2109 addr = &((struct sockaddr_un *)sa)->sun_path;
2110 break;
2111 #ifdef INET6
2112 case AF_INET6:
2113 addr = &((struct sockaddr_in6 *)sa)->sin6_addr;
2114 break;
2115 #endif
2116 default:
2117 return NULL;
2118 }
2119 inet_ntop(sa->sa_family, addr, addrbuf, sizeof(addrbuf));
2120 return addrbuf;
2121 }
2122
2123 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
2124 static int
2125 setpolicy(int lnet, struct addrinfo *res, char *policy)
2126 {
2127 char *buf;
2128 int level;
2129 int optname;
2130
2131 if (policy == NULL)
2132 return 0;
2133
2134 buf = ipsec_set_policy(policy, strlen(policy));
2135 if (buf == NULL) {
2136 printf("%s\n", ipsec_strerror());
2137 return -1;
2138 }
2139 level = res->ai_family == AF_INET ? IPPROTO_IP : IPPROTO_IPV6;
2140 optname = res->ai_family == AF_INET ? IP_IPSEC_POLICY : IPV6_IPSEC_POLICY;
2141 if (setsockopt(lnet, level, optname, buf, ipsec_get_policylen(buf)) < 0){
2142 perror("setsockopt");
2143 return -1;
2144 }
2145
2146 free(buf);
2147 return 0;
2148 }
2149 #endif
2150
2151 #ifdef INET6
2152 /*
2153 * When an Address Family related error happend, check if retry with
2154 * another AF is possible or not.
2155 * Return 1, if retry with another af is OK. Else, return 0.
2156 */
2157 static int
2158 switch_af(struct addrinfo **aip)
2159 {
2160 int nextaf;
2161 struct addrinfo *ai;
2162
2163 ai = *aip;
2164 nextaf = (ai->ai_family == AF_INET) ? AF_INET6 : AF_INET;
2165 do
2166 ai=ai->ai_next;
2167 while (ai != NULL && ai->ai_family != nextaf);
2168 *aip = ai;
2169 if (*aip != NULL) {
2170 return 1;
2171 }
2172 return 0;
2173 }
2174 #endif
2175
2176 int
2177 tn(int argc, char *argv[])
2178 {
2179 char *srp = 0;
2180 int proto, opt;
2181 int srlen;
2182 int srcroute = 0, result;
2183 char *cmd, *hostp = 0, *portp = 0, *user = 0;
2184 char *src_addr = NULL;
2185 struct addrinfo hints, *res, *res0 = NULL, *src_res, *src_res0 = NULL;
2186 int error = 0, af_error = 0;
2187
2188 if (connected) {
2189 printf("?Already connected to %s\n", hostname);
2190 setuid(getuid());
2191 return 0;
2192 }
2193 if (argc < 2) {
2194 (void) strcpy(line, "open ");
2195 printf("(to) ");
2196 (void) fgets(&line[strlen(line)], sizeof(line) - strlen(line), stdin);
2197 makeargv();
2198 argc = margc;
2199 argv = margv;
2200 }
2201 cmd = *argv;
2202 --argc; ++argv;
2203 while (argc) {
2204 if (strcmp(*argv, "help") == 0 || isprefix(*argv, "?"))
2205 goto usage;
2206 if (strcmp(*argv, "-l") == 0) {
2207 --argc; ++argv;
2208 if (argc == 0)
2209 goto usage;
2210 user = *argv++;
2211 --argc;
2212 continue;
2213 }
2214 if (strcmp(*argv, "-a") == 0) {
2215 --argc; ++argv;
2216 autologin = 1;
2217 continue;
2218 }
2219 if (strcmp(*argv, "-s") == 0) {
2220 --argc; ++argv;
2221 if (argc == 0)
2222 goto usage;
2223 src_addr = *argv++;
2224 --argc;
2225 continue;
2226 }
2227 if (hostp == 0) {
2228 hostp = *argv++;
2229 --argc;
2230 continue;
2231 }
2232 if (portp == 0) {
2233 portp = *argv++;
2234 --argc;
2235 continue;
2236 }
2237 usage:
2238 printf("usage: %s [-l user] [-a] [-s src_addr] host-name [port]\n", cmd);
2239 setuid(getuid());
2240 return 0;
2241 }
2242 if (hostp == 0)
2243 goto usage;
2244
2245 if (src_addr != NULL) {
2246 memset(&hints, 0, sizeof(hints));
2247 hints.ai_family = family;
2248 hints.ai_socktype = SOCK_STREAM;
2249 error = getaddrinfo(src_addr, 0, &hints, &src_res);
2250 if (error == EAI_NONAME) {
2251 hints.ai_flags = 0;
2252 error = getaddrinfo(src_addr, 0, &hints, &src_res);
2253 }
2254 if (error != 0) {
2255 fprintf(stderr, "%s: %s\n", src_addr, gai_strerror(error));
2256 if (error == EAI_SYSTEM)
2257 fprintf(stderr, "%s: %s\n", src_addr, strerror(errno));
2258 setuid(getuid());
2259 return 0;
2260 }
2261 src_res0 = src_res;
2262 }
2263 if (hostp[0] == '/') {
2264 struct sockaddr_un su;
2265
2266 if (strlen(hostp) >= sizeof(su.sun_path)) {
2267 fprintf(stderr, "hostname too long for unix domain socket: %s",
2268 hostp);
2269 goto fail;
2270 }
2271 hostname = hostp;
2272 memset(&su, 0, sizeof su);
2273 su.sun_family = AF_UNIX;
2274 strlcpy(su.sun_path, hostp, sizeof su.sun_path);
2275 printf("Trying %s...\n", hostp);
2276 net = socket(AF_UNIX, SOCK_STREAM, 0);
2277 if ( net < 0) {
2278 perror("socket");
2279 goto fail;
2280 }
2281 if (connect(net, (struct sockaddr *)&su, sizeof su) == -1) {
2282 perror(su.sun_path);
2283 (void) NetClose(net);
2284 goto fail;
2285 }
2286 goto af_unix;
2287 } else if (hostp[0] == '@' || hostp[0] == '!') {
2288 if (
2289 #ifdef INET6
2290 family == AF_INET6 ||
2291 #endif
2292 (hostname = strrchr(hostp, ':')) == NULL)
2293 hostname = strrchr(hostp, '@');
2294 if (hostname == NULL) {
2295 hostname = hostp;
2296 } else {
2297 hostname++;
2298 srcroute = 1;
2299 }
2300 } else
2301 hostname = hostp;
2302 if (!portp) {
2303 telnetport = 1;
2304 portp = strdup("telnet");
2305 } else if (*portp == '-') {
2306 portp++;
2307 telnetport = 1;
2308 } else if (*portp == '+') {
2309 portp++;
2310 telnetport = -1;
2311 } else
2312 telnetport = 0;
2313
2314 memset(&hints, 0, sizeof(hints));
2315 hints.ai_flags = AI_NUMERICHOST;
2316 hints.ai_family = family;
2317 hints.ai_socktype = SOCK_STREAM;
2318 error = getaddrinfo(hostname, portp, &hints, &res);
2319 if (error) {
2320 hints.ai_flags = AI_CANONNAME;
2321 error = getaddrinfo(hostname, portp, &hints, &res);
2322 }
2323 if (error != 0) {
2324 fprintf(stderr, "%s: %s\n", hostname, gai_strerror(error));
2325 if (error == EAI_SYSTEM)
2326 fprintf(stderr, "%s: %s\n", hostname, strerror(errno));
2327 setuid(getuid());
2328 goto fail;
2329 }
2330 if (hints.ai_flags == AI_NUMERICHOST) {
2331 /* hostname has numeric */
2332 int gni_err = 1;
2333
2334 if (doaddrlookup)
2335 gni_err = getnameinfo(res->ai_addr, res->ai_addr->sa_len,
2336 _hostname, sizeof(_hostname) - 1, NULL, 0,
2337 NI_NAMEREQD);
2338 if (gni_err != 0)
2339 (void) strncpy(_hostname, hostp, sizeof(_hostname) - 1);
2340 _hostname[sizeof(_hostname)-1] = '\0';
2341 hostname = _hostname;
2342 } else {
2343 /* hostname has FQDN */
2344 if (srcroute != 0)
2345 (void) strncpy(_hostname, hostname, sizeof(_hostname) - 1);
2346 else if (res->ai_canonname != NULL)
2347 strcpy(_hostname, res->ai_canonname);
2348 else
2349 (void) strncpy(_hostname, hostp, sizeof(_hostname) - 1);
2350 _hostname[sizeof(_hostname)-1] = '\0';
2351 hostname = _hostname;
2352 }
2353 res0 = res;
2354 #ifdef INET6
2355 af_again:
2356 #endif
2357 if (srcroute != 0) {
2358 static char hostbuf[BUFSIZ];
2359
2360 if (af_error == 0) { /* save intermediate hostnames for retry */
2361 strncpy(hostbuf, hostp, BUFSIZ - 1);
2362 hostbuf[BUFSIZ - 1] = '\0';
2363 } else
2364 hostp = hostbuf;
2365 srp = 0;
2366 result = sourceroute(res, hostp, &srp, &srlen, &proto, &opt);
2367 if (result == 0) {
2368 #ifdef INET6
2369 if (family == AF_UNSPEC && af_error == 0 &&
2370 switch_af(&res) == 1) {
2371 af_error = 1;
2372 goto af_again;
2373 }
2374 #endif
2375 setuid(getuid());
2376 goto fail;
2377 } else if (result == -1) {
2378 printf("Bad source route option: %s\n", hostp);
2379 setuid(getuid());
2380 goto fail;
2381 }
2382 }
2383 do {
2384 printf("Trying %s...\n", sockaddr_ntop(res->ai_addr));
2385 net = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
2386 setuid(getuid());
2387 if (net < 0) {
2388 #ifdef INET6
2389 if (family == AF_UNSPEC && af_error == 0 &&
2390 switch_af(&res) == 1) {
2391 af_error = 1;
2392 goto af_again;
2393 }
2394 #endif
2395 perror("telnet: socket");
2396 goto fail;
2397 }
2398 if (srp && setsockopt(net, proto, opt, (char *)srp, srlen) < 0)
2399 perror("setsockopt (source route)");
2400 #if defined(IPPROTO_IP) && defined(IP_TOS)
2401 if (res->ai_family == PF_INET) {
2402 # if defined(HAS_GETTOS)
2403 struct tosent *tp;
2404 if (tos < 0 && (tp = gettosbyname("telnet", "tcp")))
2405 tos = tp->t_tos;
2406 # endif
2407 if (tos < 0)
2408 tos = IPTOS_LOWDELAY;
2409 if (tos
2410 && (setsockopt(net, IPPROTO_IP, IP_TOS,
2411 (char *)&tos, sizeof(int)) < 0)
2412 && (errno != ENOPROTOOPT))
2413 perror("telnet: setsockopt (IP_TOS) (ignored)");
2414 }
2415 #endif /* defined(IPPROTO_IP) && defined(IP_TOS) */
2416
2417 if (telnet_debug && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 1) < 0) {
2418 perror("setsockopt (SO_DEBUG)");
2419 }
2420
2421 if (src_addr != NULL) {
2422 for (src_res = src_res0; src_res != 0; src_res = src_res->ai_next)
2423 if (src_res->ai_family == res->ai_family)
2424 break;
2425 if (src_res == NULL)
2426 src_res = src_res0;
2427 if (bind(net, src_res->ai_addr, src_res->ai_addrlen) == -1) {
2428 #ifdef INET6
2429 if (family == AF_UNSPEC && af_error == 0 &&
2430 switch_af(&res) == 1) {
2431 af_error = 1;
2432 (void) NetClose(net);
2433 goto af_again;
2434 }
2435 #endif
2436 perror("bind");
2437 (void) NetClose(net);
2438 goto fail;
2439 }
2440 }
2441 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
2442 if (setpolicy(net, res, ipsec_policy_in) < 0) {
2443 (void) NetClose(net);
2444 goto fail;
2445 }
2446 if (setpolicy(net, res, ipsec_policy_out) < 0) {
2447 (void) NetClose(net);
2448 goto fail;
2449 }
2450 #endif
2451
2452 if (connect(net, res->ai_addr, res->ai_addrlen) < 0) {
2453 struct addrinfo *next;
2454
2455 next = res->ai_next;
2456 /* If already an af failed, only try same af. */
2457 if (af_error != 0)
2458 while (next != NULL && next->ai_family != res->ai_family)
2459 next = next->ai_next;
2460 warn("connect to address %s", sockaddr_ntop(res->ai_addr));
2461 if (next != NULL) {
2462 res = next;
2463 (void) NetClose(net);
2464 continue;
2465 }
2466 warnx("Unable to connect to remote host");
2467 (void) NetClose(net);
2468 goto fail;
2469 }
2470 connected++;
2471 #ifdef AUTHENTICATION
2472 #ifdef ENCRYPTION
2473 auth_encrypt_connect(connected);
2474 #endif
2475 #endif
2476 } while (connected == 0);
2477 freeaddrinfo(res0);
2478 if (src_res0 != NULL)
2479 freeaddrinfo(src_res0);
2480 cmdrc(hostp, hostname);
2481 af_unix:
2482 connected = 1;
2483 if (autologin && user == NULL) {
2484 struct passwd *pw;
2485
2486 user = getenv("USER");
2487 if (user == NULL ||
2488 ((pw = getpwnam(user)) && pw->pw_uid != getuid())) {
2489 if ((pw = getpwuid(getuid())))
2490 user = pw->pw_name;
2491 else
2492 user = NULL;
2493 }
2494 }
2495 if (user) {
2496 env_define("USER", user);
2497 env_export("USER");
2498 }
2499 (void) call(status, "status", "notmuch", 0);
2500 if (setjmp(peerdied) == 0)
2501 telnet(user);
2502 (void) NetClose(net);
2503 ExitString("Connection closed by foreign host.\n",1);
2504 /*NOTREACHED*/
2505 fail:
2506 if (res0 != NULL)
2507 freeaddrinfo(res0);
2508 if (src_res0 != NULL)
2509 freeaddrinfo(src_res0);
2510 return 0;
2511 }
2512
2513 #define HELPINDENT (sizeof ("connect"))
2514
2515 static char
2516 openhelp[] = "connect to a site",
2517 closehelp[] = "close current connection",
2518 logouthelp[] = "forcibly logout remote user and close the connection",
2519 quithelp[] = "exit telnet",
2520 statushelp[] = "print status information",
2521 helphelp[] = "print help information",
2522 sendhelp[] = "transmit special characters ('send ?' for more)",
2523 sethelp[] = "set operating parameters ('set ?' for more)",
2524 unsethelp[] = "unset operating parameters ('unset ?' for more)",
2525 togglestring[] ="toggle operating parameters ('toggle ?' for more)",
2526 slchelp[] = "change state of special charaters ('slc ?' for more)",
2527 displayhelp[] = "display operating parameters",
2528 #ifdef AUTHENTICATION
2529 authhelp[] = "turn on (off) authentication ('auth ?' for more)",
2530 #endif
2531 #ifdef ENCRYPTION
2532 encrypthelp[] = "turn on (off) encryption ('encrypt ?' for more)",
2533 #endif /* ENCRYPTION */
2534 zhelp[] = "suspend telnet",
2535 #ifdef OPIE
2536 opiehelp[] = "compute response to OPIE challenge",
2537 #endif
2538 shellhelp[] = "invoke a subshell",
2539 envhelp[] = "change environment variables ('environ ?' for more)",
2540 modestring[] = "try to enter line or character mode ('mode ?' for more)";
2541
2542 static Command cmdtab[] = {
2543 { "close", closehelp, bye, 1 },
2544 { "logout", logouthelp, (int (*)(int, char **))logout, 1 },
2545 { "display", displayhelp, display, 0 },
2546 { "mode", modestring, modecmd, 0 },
2547 { "telnet", openhelp, tn, 0 },
2548 { "open", openhelp, tn, 0 },
2549 { "quit", quithelp, (int (*)(int, char **))quit, 0 },
2550 { "send", sendhelp, sendcmd, 0 },
2551 { "set", sethelp, setcmd, 0 },
2552 { "unset", unsethelp, unsetcmd, 0 },
2553 { "status", statushelp, status, 0 },
2554 { "toggle", togglestring, toggle, 0 },
2555 { "slc", slchelp, slccmd, 0 },
2556 #ifdef AUTHENTICATION
2557 { "auth", authhelp, auth_cmd, 0 },
2558 #endif
2559 #ifdef ENCRYPTION
2560 { "encrypt", encrypthelp, encrypt_cmd, 0 },
2561 #endif /* ENCRYPTION */
2562 { "z", zhelp, (int (*)(int, char **))suspend, 0 },
2563 { "!", shellhelp, shell, 1 },
2564 { "environ", envhelp, env_cmd, 0 },
2565 { "?", helphelp, help, 0 },
2566 #ifdef OPIE
2567 { "opie", opiehelp, opie_calc, 0 },
2568 #endif
2569 { NULL, NULL, NULL, 0 }
2570 };
2571
2572 static char crmodhelp[] = "deprecated command -- use 'toggle crmod' instead";
2573 static char escapehelp[] = "deprecated command -- use 'set escape' instead";
2574
2575 static Command cmdtab2[] = {
2576 { "help", 0, help, 0 },
2577 { "escape", escapehelp, setescape, 0 },
2578 { "crmod", crmodhelp, (int (*)(int, char **))togcrmod, 0 },
2579 { NULL, NULL, NULL, 0 }
2580 };
2581
2582
2583 /*
2584 * Call routine with argc, argv set from args (terminated by 0).
2585 */
2586
2587 static int
2588 call(intrtn_t routine, ...)
2589 {
2590 va_list ap;
2591 char *args[100];
2592 int argno = 0;
2593
2594 va_start(ap, routine);
2595 while ((args[argno++] = va_arg(ap, char *)) != 0);
2596 va_end(ap);
2597 return (*routine)(argno-1, args);
2598 }
2599
2600
2601 static Command *
2602 getcmd(char *name)
2603 {
2604 Command *cm;
2605
2606 if ((cm = (Command *) genget(name, (char **) cmdtab, sizeof(Command))))
2607 return cm;
2608 return (Command *) genget(name, (char **) cmdtab2, sizeof(Command));
2609 }
2610
2611 void
2612 command(int top, const char *tbuf, int cnt)
2613 {
2614 Command *c;
2615
2616 setcommandmode();
2617 if (!top) {
2618 putchar('\n');
2619 } else {
2620 (void) signal(SIGINT, SIG_DFL);
2621 (void) signal(SIGQUIT, SIG_DFL);
2622 }
2623 for (;;) {
2624 if (rlogin == _POSIX_VDISABLE)
2625 printf("%s> ", prompt);
2626 if (tbuf) {
2627 char *cp;
2628 cp = line;
2629 while (cnt > 0 && (*cp++ = *tbuf++) != '\n')
2630 cnt--;
2631 tbuf = 0;
2632 if (cp == line || *--cp != '\n' || cp == line)
2633 goto getline;
2634 *cp = '\0';
2635 if (rlogin == _POSIX_VDISABLE)
2636 printf("%s\n", line);
2637 } else {
2638 getline:
2639 if (rlogin != _POSIX_VDISABLE)
2640 printf("%s> ", prompt);
2641 if (fgets(line, sizeof(line), stdin) == NULL) {
2642 if (feof(stdin) || ferror(stdin)) {
2643 (void) quit();
2644 /*NOTREACHED*/
2645 }
2646 break;
2647 }
2648 }
2649 if (line[0] == 0)
2650 break;
2651 makeargv();
2652 if (margv[0] == 0) {
2653 break;
2654 }
2655 c = getcmd(margv[0]);
2656 if (Ambiguous((void *)c)) {
2657 printf("?Ambiguous command\n");
2658 continue;
2659 }
2660 if (c == 0) {
2661 printf("?Invalid command\n");
2662 continue;
2663 }
2664 if (c->needconnect && !connected) {
2665 printf("?Need to be connected first.\n");
2666 continue;
2667 }
2668 if ((*c->handler)(margc, margv)) {
2669 break;
2670 }
2671 }
2672 if (!top) {
2673 if (!connected) {
2674 longjmp(toplevel, 1);
2675 /*NOTREACHED*/
2676 }
2677 setconnmode(0);
2678 }
2679 }
2680 \f
2681 /*
2682 * Help command.
2683 */
2684 static int
2685 help(int argc, char *argv[])
2686 {
2687 Command *c;
2688
2689 if (argc == 1) {
2690 printf("Commands may be abbreviated. Commands are:\n\n");
2691 for (c = cmdtab; c->name; c++)
2692 if (c->help) {
2693 printf("%-*s\t%s\n", (int)HELPINDENT, c->name,
2694 c->help);
2695 }
2696 return 0;
2697 }
2698 else while (--argc > 0) {
2699 char *arg;
2700 arg = *++argv;
2701 c = getcmd(arg);
2702 if (Ambiguous((void *)c))
2703 printf("?Ambiguous help command %s\n", arg);
2704 else if (c == (Command *)0)
2705 printf("?Invalid help command %s\n", arg);
2706 else
2707 printf("%s\n", c->help);
2708 }
2709 return 0;
2710 }
2711
2712 static char *rcname = 0;
2713 static char rcbuf[128];
2714
2715 void
2716 cmdrc(char *m1, char *m2)
2717 {
2718 Command *c;
2719 FILE *rcfile;
2720 int gotmachine = 0;
2721 int l1 = strlen(m1);
2722 int l2 = strlen(m2);
2723 char m1save[MAXHOSTNAMELEN];
2724
2725 if (skiprc)
2726 return;
2727
2728 strlcpy(m1save, m1, sizeof(m1save));
2729 m1 = m1save;
2730
2731 if (rcname == 0) {
2732 rcname = getenv("HOME");
2733 if (rcname && (strlen(rcname) + 10) < sizeof(rcbuf))
2734 strcpy(rcbuf, rcname);
2735 else
2736 rcbuf[0] = '\0';
2737 strcat(rcbuf, "/.telnetrc");
2738 rcname = rcbuf;
2739 }
2740
2741 if ((rcfile = fopen(rcname, "r")) == 0) {
2742 return;
2743 }
2744
2745 for (;;) {
2746 if (fgets(line, sizeof(line), rcfile) == NULL)
2747 break;
2748 if (line[0] == 0)
2749 break;
2750 if (line[0] == '#')
2751 continue;
2752 if (gotmachine) {
2753 if (!isspace(line[0]))
2754 gotmachine = 0;
2755 }
2756 if (gotmachine == 0) {
2757 if (isspace(line[0]))
2758 continue;
2759 if (strncasecmp(line, m1, l1) == 0)
2760 strncpy(line, &line[l1], sizeof(line) - l1);
2761 else if (strncasecmp(line, m2, l2) == 0)
2762 strncpy(line, &line[l2], sizeof(line) - l2);
2763 else if (strncasecmp(line, "DEFAULT", 7) == 0)
2764 strncpy(line, &line[7], sizeof(line) - 7);
2765 else
2766 continue;
2767 if (line[0] != ' ' && line[0] != '\t' && line[0] != '\n')
2768 continue;
2769 gotmachine = 1;
2770 }
2771 makeargv();
2772 if (margv[0] == 0)
2773 continue;
2774 c = getcmd(margv[0]);
2775 if (Ambiguous((void *)c)) {
2776 printf("?Ambiguous command: %s\n", margv[0]);
2777 continue;
2778 }
2779 if (c == 0) {
2780 printf("?Invalid command: %s\n", margv[0]);
2781 continue;
2782 }
2783 /*
2784 * This should never happen...
2785 */
2786 if (c->needconnect && !connected) {
2787 printf("?Need to be connected first for %s.\n", margv[0]);
2788 continue;
2789 }
2790 (*c->handler)(margc, margv);
2791 }
2792 fclose(rcfile);
2793 }
2794
2795 /*
2796 * Source route is handed in as
2797 * [!]@hop1@hop2...[@|:]dst
2798 * If the leading ! is present, it is a
2799 * strict source route, otherwise it is
2800 * assmed to be a loose source route.
2801 *
2802 * We fill in the source route option as
2803 * hop1,hop2,hop3...dest
2804 * and return a pointer to hop1, which will
2805 * be the address to connect() to.
2806 *
2807 * Arguments:
2808 *
2809 * res: ponter to addrinfo structure which contains sockaddr to
2810 * the host to connect to.
2811 *
2812 * arg: pointer to route list to decipher
2813 *
2814 * cpp: If *cpp is not equal to NULL, this is a
2815 * pointer to a pointer to a character array
2816 * that should be filled in with the option.
2817 *
2818 * lenp: pointer to an integer that contains the
2819 * length of *cpp if *cpp != NULL.
2820 *
2821 * protop: pointer to an integer that should be filled in with
2822 * appropriate protocol for setsockopt, as socket
2823 * protocol family.
2824 *
2825 * optp: pointer to an integer that should be filled in with
2826 * appropriate option for setsockopt, as socket protocol
2827 * family.
2828 *
2829 * Return values:
2830 *
2831 * If the return value is 1, then all operations are
2832 * successful. If the
2833 * return value is -1, there was a syntax error in the
2834 * option, either unknown characters, or too many hosts.
2835 * If the return value is 0, one of the hostnames in the
2836 * path is unknown, and *cpp is set to point to the bad
2837 * hostname.
2838 *
2839 * *cpp: If *cpp was equal to NULL, it will be filled
2840 * in with a pointer to our static area that has
2841 * the option filled in. This will be 32bit aligned.
2842 *
2843 * *lenp: This will be filled in with how long the option
2844 * pointed to by *cpp is.
2845 *
2846 * *protop: This will be filled in with appropriate protocol for
2847 * setsockopt, as socket protocol family.
2848 *
2849 * *optp: This will be filled in with appropriate option for
2850 * setsockopt, as socket protocol family.
2851 */
2852 static int
2853 sourceroute(struct addrinfo *ai, char *arg, char **cpp, int *lenp, int *protop, int *optp)
2854 {
2855 static char buf[1024 + ALIGNBYTES]; /*XXX*/
2856 char *cp, *cp2, *lsrp, *ep;
2857 struct sockaddr_in *_sin;
2858 #ifdef INET6
2859 struct sockaddr_in6 *sin6;
2860 struct ip6_rthdr *rth;
2861 #endif
2862 struct addrinfo hints, *res;
2863 int error;
2864 char c;
2865
2866 /*
2867 * Verify the arguments, and make sure we have
2868 * at least 7 bytes for the option.
2869 */
2870 if (cpp == NULL || lenp == NULL)
2871 return -1;
2872 if (*cpp != NULL) {
2873 switch (res->ai_family) {
2874 case AF_INET:
2875 if (*lenp < 7)
2876 return -1;
2877 break;
2878 #ifdef INET6
2879 case AF_INET6:
2880 if (*lenp < (int)CMSG_SPACE(sizeof(struct ip6_rthdr) +
2881 sizeof(struct in6_addr)))
2882 return -1;
2883 break;
2884 #endif
2885 }
2886 }
2887 /*
2888 * Decide whether we have a buffer passed to us,
2889 * or if we need to use our own static buffer.
2890 */
2891 if (*cpp) {
2892 lsrp = *cpp;
2893 ep = lsrp + *lenp;
2894 } else {
2895 *cpp = lsrp = (char *)ALIGN(buf);
2896 ep = lsrp + 1024;
2897 }
2898
2899 cp = arg;
2900
2901 #ifdef INET6
2902 if (ai->ai_family == AF_INET6) {
2903 if ((rth = inet6_rth_init((void *)*cpp, sizeof(buf),
2904 IPV6_RTHDR_TYPE_0, 0)) == NULL)
2905 return -1;
2906 if (*cp != '@')
2907 return -1;
2908 *protop = IPPROTO_IPV6;
2909 *optp = IPV6_RTHDR;
2910 } else
2911 #endif
2912 {
2913 /*
2914 * Next, decide whether we have a loose source
2915 * route or a strict source route, and fill in
2916 * the begining of the option.
2917 */
2918 if (*cp == '!') {
2919 cp++;
2920 *lsrp++ = IPOPT_SSRR;
2921 } else
2922 *lsrp++ = IPOPT_LSRR;
2923
2924 if (*cp != '@')
2925 return -1;
2926
2927 lsrp++; /* skip over length, we'll fill it in later */
2928 *lsrp++ = 4;
2929 *protop = IPPROTO_IP;
2930 *optp = IP_OPTIONS;
2931 }
2932
2933 cp++;
2934 memset(&hints, 0, sizeof(hints));
2935 hints.ai_family = ai->ai_family;
2936 hints.ai_socktype = SOCK_STREAM;
2937 for (c = 0;;) {
2938 if (
2939 #ifdef INET6
2940 ai->ai_family != AF_INET6 &&
2941 #endif
2942 c == ':')
2943 cp2 = 0;
2944 else for (cp2 = cp; (c = *cp2); cp2++) {
2945 if (c == ',') {
2946 *cp2++ = '\0';
2947 if (*cp2 == '@')
2948 cp2++;
2949 } else if (c == '@') {
2950 *cp2++ = '\0';
2951 } else if (
2952 #ifdef INET6
2953 ai->ai_family != AF_INET6 &&
2954 #endif
2955 c == ':') {
2956 *cp2++ = '\0';
2957 } else
2958 continue;
2959 break;
2960 }
2961 if (!c)
2962 cp2 = 0;
2963
2964 hints.ai_flags = AI_NUMERICHOST;
2965 error = getaddrinfo(cp, NULL, &hints, &res);
2966 if (error == EAI_NONAME) {
2967 hints.ai_flags = 0;
2968 error = getaddrinfo(cp, NULL, &hints, &res);
2969 }
2970 if (error != 0) {
2971 fprintf(stderr, "%s: %s\n", cp, gai_strerror(error));
2972 if (error == EAI_SYSTEM)
2973 fprintf(stderr, "%s: %s\n", cp,
2974 strerror(errno));
2975 *cpp = cp;
2976 return(0);
2977 }
2978 #ifdef INET6
2979 if (res->ai_family == AF_INET6) {
2980 sin6 = (struct sockaddr_in6 *)res->ai_addr;
2981 if (inet6_rth_add((void *)rth, &sin6->sin6_addr) == -1)
2982 return(0);
2983 } else
2984 #endif
2985 {
2986 _sin = (struct sockaddr_in *)res->ai_addr;
2987 memcpy(lsrp, (char *)&_sin->sin_addr, 4);
2988 lsrp += 4;
2989 }
2990 if (cp2)
2991 cp = cp2;
2992 else
2993 break;
2994 /*
2995 * Check to make sure there is space for next address
2996 */
2997 if (lsrp + 4 > ep)
2998 return -1;
2999 freeaddrinfo(res);
3000 }
3001 #ifdef INET6
3002 if (res->ai_family == AF_INET6) {
3003 rth->ip6r_len = rth->ip6r_segleft * 2;
3004 *lenp = (rth->ip6r_len + 1) << 3;
3005 } else
3006 #endif
3007 {
3008 if ((*(*cpp+IPOPT_OLEN) = lsrp - *cpp) <= 7) {
3009 *cpp = 0;
3010 *lenp = 0;
3011 return -1;
3012 }
3013 *lsrp++ = IPOPT_NOP; /* 32 bit word align it */
3014 *lenp = lsrp - *cpp;
3015 }
3016 freeaddrinfo(res);
3017 return 1;
3018 }
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