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Remove building with NOCRYPTO option
[minix.git] / usr.bin / telnet / commands.c
blobb244b75e83f4ea9d8e82c047c3a82927eb6249ff
1 /* $NetBSD: commands.c,v 1.68 2012/01/09 16:08:55 christos Exp $ */
2
3 /*
4 * Copyright (C) 1997 and 1998 WIDE Project.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the project nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 /*
33 * Copyright (c) 1988, 1990, 1993
34 * The Regents of the University of California. All rights reserved.
35 *
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
38 * are met:
39 * 1. Redistributions of source code must retain the above copyright
40 * notice, this list of conditions and the following disclaimer.
41 * 2. Redistributions in binary form must reproduce the above copyright
42 * notice, this list of conditions and the following disclaimer in the
43 * documentation and/or other materials provided with the distribution.
44 * 3. Neither the name of the University nor the names of its contributors
45 * may be used to endorse or promote products derived from this software
46 * without specific prior written permission.
47 *
48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
58 * SUCH DAMAGE.
59 */
60
61 #include <sys/cdefs.h>
62 #ifndef lint
63 #if 0
64 static char sccsid[] = "@(#)commands.c 8.4 (Berkeley) 5/30/95";
65 #else
66 __RCSID("$NetBSD: commands.c,v 1.68 2012/01/09 16:08:55 christos Exp $");
67 #endif
68 #endif /* not lint */
69
70 #include <sys/param.h>
71 #include <sys/file.h>
72 #include <sys/wait.h>
73 #include <sys/socket.h>
74 #include <netinet/in.h>
75 #include <arpa/inet.h>
76
77 #include <ctype.h>
78 #include <errno.h>
79 #include <netdb.h>
80 #include <pwd.h>
81 #include <signal.h>
82 #include <stdarg.h>
83 #include <unistd.h>
84
85 #include <arpa/telnet.h>
86
87 #include "general.h"
88 #include "ring.h"
89 #include "externs.h"
90 #include "defines.h"
91 #include "types.h"
92 #include <libtelnet/misc.h>
93 #ifdef AUTHENTICATION
94 #include <libtelnet/auth.h>
95 #endif
96 #ifdef ENCRYPTION
97 #include <libtelnet/encrypt.h>
98 #endif
99
100 #include <netinet/in_systm.h>
101 #include <netinet/ip.h>
102
103
104 #if defined(IPPROTO_IP) && defined(IP_TOS)
105 int tos = -1;
106 #endif /* defined(IPPROTO_IP) && defined(IP_TOS) */
107
108 char *hostname;
109 static char _hostname[MAXHOSTNAMELEN];
110
111 typedef struct {
112 const char *name; /* command name */
113 const char *help; /* help string (NULL for no help) */
114 int (*handler) /* routine which executes command */
115 (int, char *[]);
116 int needconnect; /* Do we need to be connected to execute? */
117 } Command;
118
119 static char line[256];
120 static char saveline[256];
121 static int margc;
122 static char *margv[20];
123
124 static void makeargv(void);
125 static int special(char *);
126 static const char *control(cc_t);
127 static int sendcmd(int, char **);
128 static int send_esc(char *);
129 static int send_docmd(char *);
130 static int send_dontcmd(char *);
131 static int send_willcmd(char *);
132 static int send_wontcmd(char *);
133 static int send_help(char *);
134 static int lclchars(int);
135 static int togdebug(int);
136 static int togcrlf(int);
137 static int togbinary(int);
138 static int togrbinary(int);
139 static int togxbinary(int);
140 static int togglehelp(int);
141 static void settogglehelp(int);
142 static int toggle(int, char *[]);
143 static struct setlist *getset(char *);
144 static int setcmd(int, char *[]);
145 static int unsetcmd(int, char *[]);
146 static int dokludgemode(int);
147 static int dolinemode(int);
148 static int docharmode(int);
149 static int dolmmode(int, int );
150 static int modecmd(int, char *[]);
151 static int display(int, char *[]);
152 static int setescape(int, char *[]);
153 static int togcrmod(int, char *[]);
154 static int bye(int, char *[]);
155 static void slc_help(int);
156 static struct slclist *getslc(char *);
157 static int slccmd(int, char *[]);
158 static struct env_lst *env_help(const unsigned char *, unsigned char *);
159 static struct envlist *getenvcmd(char *);
160 #ifdef AUTHENTICATION
161 static int auth_help(char *);
162 #endif
163 #ifdef TN3270
164 static void filestuff(int);
165 #endif
166 static int status(int, char *[]);
167 static const char *sockaddr_ntop (struct sockaddr *);
168 typedef int (*intrtn_t)(int, char **);
169 static int call(intrtn_t, ...);
170 static Command *getcmd(char *);
171 static int help(int, char *[]);
172
173 static void
174 makeargv(void)
175 {
176 char *cp, *cp2, c;
177 char **argp = margv;
178 static char bang[] = "!";
179
180 margc = 0;
181 cp = line;
182 if (*cp == '!') { /* Special case shell escape */
183 strlcpy(saveline, line, sizeof(saveline)); /* save for shell command */
184 *argp++ = bang; /* No room in string to get this */
185 margc++;
186 cp++;
187 }
188 while ((c = *cp) != '\0') {
189 int inquote = 0;
190 while (isspace((unsigned char)c))
191 c = *++cp;
192 if (c == '\0')
193 break;
194 *argp++ = cp;
195 margc += 1;
196 for (cp2 = cp; c != '\0'; c = *++cp) {
197 if (inquote) {
198 if (c == inquote) {
199 inquote = 0;
200 continue;
201 }
202 } else {
203 if (c == '\\') {
204 if ((c = *++cp) == '\0')
205 break;
206 } else if (c == '"') {
207 inquote = '"';
208 continue;
209 } else if (c == '\'') {
210 inquote = '\'';
211 continue;
212 } else if (isspace((unsigned char)c))
213 break;
214 }
215 *cp2++ = c;
216 }
217 *cp2 = '\0';
218 if (c == '\0')
219 break;
220 cp++;
221 }
222 *argp++ = 0;
223 }
224
225 /*
226 * Make a character string into a number.
227 *
228 * Todo: 1. Could take random integers (12, 0x12, 012, 0b1).
229 */
230
231 static int
232 special(char *s)
233 {
234 char c;
235 char b;
236
237 switch (*s) {
238 case '^':
239 b = *++s;
240 if (b == '?') {
241 c = b | 0x40; /* DEL */
242 } else {
243 c = b & 0x1f;
244 }
245 break;
246 default:
247 c = *s;
248 break;
249 }
250 return c;
251 }
252
253 /*
254 * Construct a control character sequence
255 * for a special character.
256 */
257 static const char *
258 control(cc_t c)
259 {
260 static char buf[5];
261 /*
262 * The only way I could get the Sun 3.5 compiler
263 * to shut up about
264 * if ((unsigned int)c >= 0x80)
265 * was to assign "c" to an unsigned int variable...
266 * Arggg....
267 */
268 unsigned int uic = (unsigned int)c;
269
270 if (uic == 0x7f)
271 return ("^?");
272 if (c == (cc_t)_POSIX_VDISABLE) {
273 return "off";
274 }
275 if (uic >= 0x80) {
276 buf[0] = '\\';
277 buf[1] = ((c>>6)&07) + '0';
278 buf[2] = ((c>>3)&07) + '0';
279 buf[3] = (c&07) + '0';
280 buf[4] = 0;
281 } else if (uic >= 0x20) {
282 buf[0] = c;
283 buf[1] = 0;
284 } else {
285 buf[0] = '^';
286 buf[1] = '@'+c;
287 buf[2] = 0;
288 }
289 return (buf);
290 }
291
292
293
294 /*
295 * The following are data structures and routines for
296 * the "send" command.
297 *
298 */
299
300 struct sendlist {
301 const char *name; /* How user refers to it (case independent) */
302 const char *help; /* Help information (0 ==> no help) */
303 int needconnect; /* Need to be connected */
304 int narg; /* Number of arguments */
305 int (*handler) /* Routine to perform (for special ops) */
306 (char *);
307 int nbyte; /* Number of bytes to send this command */
308 int what; /* Character to be sent (<0 ==> special) */
309 };
310 \f
311
312 static struct sendlist Sendlist[] = {
313 { "ao", "Send Telnet Abort output", 1, 0, 0, 2, AO },
314 { "ayt", "Send Telnet 'Are You There'", 1, 0, 0, 2, AYT },
315 { "brk", "Send Telnet Break", 1, 0, 0, 2, BREAK },
316 { "break", 0, 1, 0, 0, 2, BREAK },
317 { "ec", "Send Telnet Erase Character", 1, 0, 0, 2, EC },
318 { "el", "Send Telnet Erase Line", 1, 0, 0, 2, EL },
319 { "escape", "Send current escape character", 1, 0, send_esc, 1, 0 },
320 { "ga", "Send Telnet 'Go Ahead' sequence", 1, 0, 0, 2, GA },
321 { "ip", "Send Telnet Interrupt Process", 1, 0, 0, 2, IP },
322 { "intp", 0, 1, 0, 0, 2, IP },
323 { "interrupt", 0, 1, 0, 0, 2, IP },
324 { "intr", 0, 1, 0, 0, 2, IP },
325 { "nop", "Send Telnet 'No operation'", 1, 0, 0, 2, NOP },
326 { "eor", "Send Telnet 'End of Record'", 1, 0, 0, 2, EOR },
327 { "abort", "Send Telnet 'Abort Process'", 1, 0, 0, 2, ABORT },
328 { "susp", "Send Telnet 'Suspend Process'", 1, 0, 0, 2, SUSP },
329 { "eof", "Send Telnet End of File Character", 1, 0, 0, 2, xEOF },
330 { "synch", "Perform Telnet 'Synch operation'", 1, 0, dosynch, 2, 0 },
331 { "getstatus", "Send request for STATUS", 1, 0, get_status, 6, 0 },
332 { "?", "Display send options", 0, 0, send_help, 0, 0 },
333 { "help", 0, 0, 0, send_help, 0, 0 },
334 { "do", 0, 0, 1, send_docmd, 3, 0 },
335 { "dont", 0, 0, 1, send_dontcmd, 3, 0 },
336 { "will", 0, 0, 1, send_willcmd, 3, 0 },
337 { "wont", 0, 0, 1, send_wontcmd, 3, 0 },
338 { .name = 0 }
339 };
340
341 #define GETSEND(name) ((struct sendlist *) genget(name, (char **) Sendlist, \
342 sizeof(struct sendlist)))
343
344 static int
345 sendcmd(int argc, char **argv)
346 {
347 int count; /* how many bytes we are going to need to send */
348 int i;
349 struct sendlist *s; /* pointer to current command */
350 int success = 0;
351 int needconnect = 0;
352
353 if (argc < 2) {
354 printf("need at least one argument for 'send' command\n");
355 printf("'send ?' for help\n");
356 return 0;
357 }
358 /*
359 * First, validate all the send arguments.
360 * In addition, we see how much space we are going to need, and
361 * whether or not we will be doing a "SYNCH" operation (which
362 * flushes the network queue).
363 */
364 count = 0;
365 for (i = 1; i < argc; i++) {
366 s = GETSEND(argv[i]);
367 if (s == 0) {
368 printf("Unknown send argument '%s'\n'send ?' for help.\n",
369 argv[i]);
370 return 0;
371 } else if (Ambiguous(s)) {
372 printf("Ambiguous send argument '%s'\n'send ?' for help.\n",
373 argv[i]);
374 return 0;
375 }
376 if (i + s->narg >= argc) {
377 fprintf(stderr,
378 "Need %d argument%s to 'send %s' command. 'send %s ?' for help.\n",
379 s->narg, s->narg == 1 ? "" : "s", s->name, s->name);
380 return 0;
381 }
382 count += s->nbyte;
383 if (s->handler == send_help) {
384 send_help(NULL);
385 return 0;
386 }
387
388 i += s->narg;
389 needconnect += s->needconnect;
390 }
391 if (!connected && needconnect) {
392 printf("?Need to be connected first.\n");
393 printf("'send ?' for help\n");
394 return 0;
395 }
396 /* Now, do we have enough room? */
397 if (NETROOM() < count) {
398 printf("There is not enough room in the buffer TO the network\n");
399 printf("to process your request. Nothing will be done.\n");
400 printf("('send synch' will throw away most data in the network\n");
401 printf("buffer, if this might help.)\n");
402 return 0;
403 }
404 /* OK, they are all OK, now go through again and actually send */
405 count = 0;
406 for (i = 1; i < argc; i++) {
407 if ((s = GETSEND(argv[i])) == 0) {
408 fprintf(stderr, "Telnet 'send' error - argument disappeared!\n");
409 (void) quit(0, NULL);
410 /*NOTREACHED*/
411 }
412 if (s->handler) {
413 count++;
414 success += (*s->handler)(argv[i+1]);
415 i += s->narg;
416 } else {
417 NET2ADD(IAC, s->what);
418 printoption("SENT", IAC, s->what);
419 }
420 }
421 return (count == success);
422 }
423
424 static int
425 send_esc(char *s)
426 {
427 NETADD(escape);
428 return 1;
429 }
430
431 static int
432 send_docmd(char *name)
433 {
434 return(send_tncmd(send_do, "do", name));
435 }
436
437 static int
438 send_dontcmd(char *name)
439 {
440 return(send_tncmd(send_dont, "dont", name));
441 }
442 static int
443 send_willcmd(char *name)
444 {
445 return(send_tncmd(send_will, "will", name));
446 }
447 static int
448 send_wontcmd(char *name)
449 {
450 return(send_tncmd(send_wont, "wont", name));
451 }
452
453 int
454 send_tncmd(void (*func)(int, int), const char *cmd, char *name)
455 {
456 const char **cpp;
457 int val = 0;
458
459 if (isprefix(name, "?")) {
460 int col, len;
461
462 printf("usage: send %s <value|option>\n", cmd);
463 printf("\"value\" must be from 0 to 255\n");
464 printf("Valid options are:\n\t");
465
466 col = 8;
467 for (cpp = telopts; *cpp; cpp++) {
468 len = strlen(*cpp) + 3;
469 if (col + len > 65) {
470 printf("\n\t");
471 col = 8;
472 }
473 printf(" \"%s\"", *cpp);
474 col += len;
475 }
476 printf("\n");
477 return 0;
478 }
479 cpp = (void *)genget(name, __UNCONST(telopts), sizeof(char *));
480 if (Ambiguous(cpp)) {
481 fprintf(stderr,"'%s': ambiguous argument ('send %s ?' for help).\n",
482 name, cmd);
483 return 0;
484 }
485 if (cpp) {
486 val = cpp - telopts;
487 } else {
488 char *cp = name;
489
490 while (*cp >= '0' && *cp <= '9') {
491 val *= 10;
492 val += *cp - '0';
493 cp++;
494 }
495 if (*cp != 0) {
496 fprintf(stderr, "'%s': unknown argument ('send %s ?' for help).\n",
497 name, cmd);
498 return 0;
499 } else if (val < 0 || val > 255) {
500 fprintf(stderr, "'%s': bad value ('send %s ?' for help).\n",
501 name, cmd);
502 return 0;
503 }
504 }
505 if (!connected) {
506 printf("?Need to be connected first.\n");
507 return 0;
508 }
509 (*func)(val, 1);
510 return 1;
511 }
512
513 static int
514 send_help(char *n)
515 {
516 struct sendlist *s; /* pointer to current command */
517 for (s = Sendlist; s->name; s++) {
518 if (s->help)
519 printf("%-15s %s\n", s->name, s->help);
520 }
521 return(0);
522 }
523 \f
524 /*
525 * The following are the routines and data structures referred
526 * to by the arguments to the "toggle" command.
527 */
528
529 static int
530 lclchars(int n)
531 {
532 donelclchars = 1;
533 return 1;
534 }
535
536 static int
537 togdebug(int n)
538 {
539 if (net > 0 &&
540 (SetSockOpt(net, SOL_SOCKET, SO_DEBUG, telnet_debug)) < 0) {
541 perror("setsockopt (SO_DEBUG)");
542 }
543 return 1;
544 }
545
546 static int
547 togcrlf(int n)
548 {
549 if (crlf) {
550 printf("Will send carriage returns as telnet <CR><LF>.\n");
551 } else {
552 printf("Will send carriage returns as telnet <CR><NUL>.\n");
553 }
554 return 1;
555 }
556
557 int binmode;
558
559 static int
560 togbinary(int val)
561 {
562 donebinarytoggle = 1;
563
564 if (val >= 0) {
565 binmode = val;
566 } else {
567 if (my_want_state_is_will(TELOPT_BINARY) &&
568 my_want_state_is_do(TELOPT_BINARY)) {
569 binmode = 1;
570 } else if (my_want_state_is_wont(TELOPT_BINARY) &&
571 my_want_state_is_dont(TELOPT_BINARY)) {
572 binmode = 0;
573 }
574 val = binmode ? 0 : 1;
575 }
576
577 if (val == 1) {
578 if (my_want_state_is_will(TELOPT_BINARY) &&
579 my_want_state_is_do(TELOPT_BINARY)) {
580 printf("Already operating in binary mode with remote host.\n");
581 } else {
582 printf("Negotiating binary mode with remote host.\n");
583 tel_enter_binary(3);
584 }
585 } else {
586 if (my_want_state_is_wont(TELOPT_BINARY) &&
587 my_want_state_is_dont(TELOPT_BINARY)) {
588 printf("Already in network ascii mode with remote host.\n");
589 } else {
590 printf("Negotiating network ascii mode with remote host.\n");
591 tel_leave_binary(3);
592 }
593 }
594 return 1;
595 }
596
597 static int
598 togrbinary(int val)
599 {
600 donebinarytoggle = 1;
601
602 if (val == -1)
603 val = my_want_state_is_do(TELOPT_BINARY) ? 0 : 1;
604
605 if (val == 1) {
606 if (my_want_state_is_do(TELOPT_BINARY)) {
607 printf("Already receiving in binary mode.\n");
608 } else {
609 printf("Negotiating binary mode on input.\n");
610 tel_enter_binary(1);
611 }
612 } else {
613 if (my_want_state_is_dont(TELOPT_BINARY)) {
614 printf("Already receiving in network ascii mode.\n");
615 } else {
616 printf("Negotiating network ascii mode on input.\n");
617 tel_leave_binary(1);
618 }
619 }
620 return 1;
621 }
622
623 static int
624 togxbinary(int val)
625 {
626 donebinarytoggle = 1;
627
628 if (val == -1)
629 val = my_want_state_is_will(TELOPT_BINARY) ? 0 : 1;
630
631 if (val == 1) {
632 if (my_want_state_is_will(TELOPT_BINARY)) {
633 printf("Already transmitting in binary mode.\n");
634 } else {
635 printf("Negotiating binary mode on output.\n");
636 tel_enter_binary(2);
637 }
638 } else {
639 if (my_want_state_is_wont(TELOPT_BINARY)) {
640 printf("Already transmitting in network ascii mode.\n");
641 } else {
642 printf("Negotiating network ascii mode on output.\n");
643 tel_leave_binary(2);
644 }
645 }
646 return 1;
647 }
648
649 #ifdef ENCRYPTION
650 extern int EncryptAutoEnc(int);
651 extern int EncryptAutoDec(int);
652 extern int EncryptDebug(int);
653 extern int EncryptVerbose(int);
654 #endif /* ENCRYPTION */
655
656 struct togglelist {
657 const char *name; /* name of toggle */
658 const char *help; /* help message */
659 int (*handler) /* routine to do actual setting */
660 (int);
661 int *variable;
662 const char *actionexplanation;
663 };
664
665 static struct togglelist Togglelist[] = {
666 { "autoflush",
667 "flushing of output when sending interrupt characters",
668 0,
669 &autoflush,
670 "flush output when sending interrupt characters" },
671 { "autosynch",
672 "automatic sending of interrupt characters in urgent mode",
673 0,
674 &autosynch,
675 "send interrupt characters in urgent mode" },
676 #ifdef AUTHENTICATION
677 { "autologin",
678 "automatic sending of login and/or authentication info",
679 0,
680 &autologin,
681 "send login name and/or authentication information" },
682 { "authdebug",
683 "Toggle authentication debugging",
684 auth_togdebug,
685 0,
686 "print authentication debugging information" },
687 #endif
688 #ifdef ENCRYPTION
689 { "autoencrypt",
690 "automatic encryption of data stream",
691 EncryptAutoEnc,
692 0,
693 "automatically encrypt output" },
694 { "autodecrypt",
695 "automatic decryption of data stream",
696 EncryptAutoDec,
697 0,
698 "automatically decrypt input" },
699 { "verbose_encrypt",
700 "Toggle verbose encryption output",
701 EncryptVerbose,
702 0,
703 "print verbose encryption output" },
704 { "encdebug",
705 "Toggle encryption debugging",
706 EncryptDebug,
707 0,
708 "print encryption debugging information" },
709 #endif /* ENCRYPTION */
710 { "skiprc",
711 "don't read ~/.telnetrc file",
712 0,
713 &skiprc,
714 "skip reading of ~/.telnetrc file" },
715 { "binary",
716 "sending and receiving of binary data",
717 togbinary,
718 0,
719 0 },
720 { "inbinary",
721 "receiving of binary data",
722 togrbinary,
723 0,
724 0 },
725 { "outbinary",
726 "sending of binary data",
727 togxbinary,
728 0,
729 0 },
730 { "crlf",
731 "sending carriage returns as telnet <CR><LF>",
732 togcrlf,
733 &crlf,
734 0 },
735 { "crmod",
736 "mapping of received carriage returns",
737 0,
738 &crmod,
739 "map carriage return on output" },
740 { "localchars",
741 "local recognition of certain control characters",
742 lclchars,
743 &localchars,
744 "recognize certain control characters" },
745 { " ", "", 0, NULL, NULL }, /* empty line */
746 #ifdef TN3270
747 { "apitrace",
748 "(debugging) toggle tracing of API transactions",
749 0,
750 &apitrace,
751 "trace API transactions" },
752 { "cursesdata",
753 "(debugging) toggle printing of hexadecimal curses data",
754 0,
755 &cursesdata,
756 "print hexadecimal representation of curses data" },
757 #endif /* defined(TN3270) */
758 { "debug",
759 "debugging",
760 togdebug,
761 &telnet_debug,
762 "turn on socket level debugging" },
763 { "netdata",
764 "printing of hexadecimal network data (debugging)",
765 0,
766 &netdata,
767 "print hexadecimal representation of network traffic" },
768 { "prettydump",
769 "output of \"netdata\" to user readable format (debugging)",
770 0,
771 &prettydump,
772 "print user readable output for \"netdata\"" },
773 { "options",
774 "viewing of options processing (debugging)",
775 0,
776 &showoptions,
777 "show option processing" },
778 { "termdata",
779 "(debugging) toggle printing of hexadecimal terminal data",
780 0,
781 &termdata,
782 "print hexadecimal representation of terminal traffic" },
783 { "?",
784 0,
785 togglehelp, NULL, NULL },
786 { "help",
787 0,
788 togglehelp, NULL, NULL },
789 { .name = 0 }
790 };
791
792 static int
793 togglehelp(int n)
794 {
795 struct togglelist *c;
796
797 for (c = Togglelist; c->name; c++) {
798 if (c->help) {
799 if (*c->help)
800 printf("%-15s toggle %s\n", c->name, c->help);
801 else
802 printf("\n");
803 }
804 }
805 printf("\n");
806 printf("%-15s %s\n", "?", "display help information");
807 return 0;
808 }
809
810 static void
811 settogglehelp(int set)
812 {
813 struct togglelist *c;
814
815 for (c = Togglelist; c->name; c++) {
816 if (c->help) {
817 if (*c->help)
818 printf("%-15s %s %s\n", c->name, set ? "enable" : "disable",
819 c->help);
820 else
821 printf("\n");
822 }
823 }
824 }
825
826 #define GETTOGGLE(name) (struct togglelist *) \
827 genget(name, (char **) Togglelist, sizeof(struct togglelist))
828
829 static int
830 toggle(int argc, char *argv[])
831 {
832 int retval = 1;
833 char *name;
834 struct togglelist *c;
835
836 if (argc < 2) {
837 fprintf(stderr,
838 "Need an argument to 'toggle' command. 'toggle ?' for help.\n");
839 return 0;
840 }
841 argc--;
842 argv++;
843 while (argc--) {
844 name = *argv++;
845 c = GETTOGGLE(name);
846 if (Ambiguous(c)) {
847 fprintf(stderr, "'%s': ambiguous argument ('toggle ?' for help).\n",
848 name);
849 return 0;
850 } else if (c == 0) {
851 fprintf(stderr, "'%s': unknown argument ('toggle ?' for help).\n",
852 name);
853 return 0;
854 } else {
855 if (c->variable) {
856 *c->variable = !*c->variable; /* invert it */
857 if (c->actionexplanation) {
858 printf("%s %s.\n", *c->variable? "Will" : "Won't",
859 c->actionexplanation);
860 }
861 }
862 if (c->handler) {
863 retval &= (*c->handler)(-1);
864 }
865 }
866 }
867 return retval;
868 }
869 \f
870 /*
871 * The following perform the "set" command.
872 */
873
874 struct termios new_tc = { .c_iflag = 0 };
875
876 struct setlist {
877 const char *name; /* name */
878 const char *help; /* help information */
879 void (*handler)(char *);
880 cc_t *charp; /* where it is located at */
881 };
882
883 static struct setlist Setlist[] = {
884 #ifdef KLUDGELINEMODE
885 { "echo", "character to toggle local echoing on/off", 0, &echoc },
886 #endif
887 { "escape", "character to escape back to telnet command mode", 0, &escape },
888 { "rlogin", "rlogin escape character", 0, &rlogin },
889 { "tracefile", "file to write trace information to", SetNetTrace, (cc_t *)NetTraceFile},
890 { " ", "", NULL, NULL },
891 { " ", "The following need 'localchars' to be toggled true", 0, 0 },
892 { "flushoutput", "character to cause an Abort Output", 0, termFlushCharp },
893 { "interrupt", "character to cause an Interrupt Process", 0, termIntCharp },
894 { "quit", "character to cause an Abort process", 0, termQuitCharp },
895 { "eof", "character to cause an EOF ", 0, termEofCharp },
896 { " ", "", NULL, NULL },
897 { " ", "The following are for local editing in linemode", 0, 0 },
898 { "erase", "character to use to erase a character", 0, termEraseCharp },
899 { "kill", "character to use to erase a line", 0, termKillCharp },
900 { "lnext", "character to use for literal next", 0, termLiteralNextCharp },
901 { "susp", "character to cause a Suspend Process", 0, termSuspCharp },
902 { "reprint", "character to use for line reprint", 0, termRprntCharp },
903 { "worderase", "character to use to erase a word", 0, termWerasCharp },
904 { "start", "character to use for XON", 0, termStartCharp },
905 { "stop", "character to use for XOFF", 0, termStopCharp },
906 { "forw1", "alternate end of line character", 0, termForw1Charp },
907 { "forw2", "alternate end of line character", 0, termForw2Charp },
908 { "ayt", "alternate AYT character", 0, termAytCharp },
909 { .name = 0 }
910 };
911
912 static struct setlist *
913 getset(char *name)
914 {
915 return (struct setlist *)
916 genget(name, (char **) Setlist, sizeof(struct setlist));
917 }
918
919 void
920 set_escape_char(char *s)
921 {
922 if (rlogin != _POSIX_VDISABLE) {
923 rlogin = (s && *s) ? special(s) : _POSIX_VDISABLE;
924 printf("Telnet rlogin escape character is '%s'.\n",
925 control(rlogin));
926 } else {
927 escape = (s && *s) ? special(s) : _POSIX_VDISABLE;
928 printf("Telnet escape character is '%s'.\n", control(escape));
929 }
930 }
931
932 static int
933 setcmd(int argc, char *argv[])
934 {
935 int value;
936 struct setlist *ct;
937 struct togglelist *c;
938
939 if (argc < 2 || argc > 3) {
940 printf("Format is 'set Name Value'\n'set ?' for help.\n");
941 return 0;
942 }
943 if ((argc == 2) && (isprefix(argv[1], "?") || isprefix(argv[1], "help"))) {
944 for (ct = Setlist; ct->name; ct++)
945 printf("%-15s %s\n", ct->name, ct->help);
946 printf("\n");
947 settogglehelp(1);
948 printf("%-15s %s\n", "?", "display help information");
949 return 0;
950 }
951
952 ct = getset(argv[1]);
953 if (ct == 0) {
954 c = GETTOGGLE(argv[1]);
955 if (c == 0) {
956 fprintf(stderr, "'%s': unknown argument ('set ?' for help).\n",
957 argv[1]);
958 return 0;
959 } else if (Ambiguous(c)) {
960 fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n",
961 argv[1]);
962 return 0;
963 }
964 if (c->variable) {
965 if ((argc == 2) || (strcmp("on", argv[2]) == 0))
966 *c->variable = 1;
967 else if (strcmp("off", argv[2]) == 0)
968 *c->variable = 0;
969 else {
970 printf("Format is 'set togglename [on|off]'\n'set ?' for help.\n");
971 return 0;
972 }
973 if (c->actionexplanation) {
974 printf("%s %s.\n", *c->variable? "Will" : "Won't",
975 c->actionexplanation);
976 }
977 }
978 if (c->handler)
979 (*c->handler)(1);
980 } else if (argc != 3) {
981 printf("Format is 'set Name Value'\n'set ?' for help.\n");
982 return 0;
983 } else if (Ambiguous(ct)) {
984 fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n",
985 argv[1]);
986 return 0;
987 } else if (ct->handler) {
988 (*ct->handler)(argv[2]);
989 printf("%s set to \"%s\".\n", ct->name, (char *)ct->charp);
990 } else {
991 if (strcmp("off", argv[2])) {
992 value = special(argv[2]);
993 } else {
994 value = _POSIX_VDISABLE;
995 }
996 *(ct->charp) = (cc_t)value;
997 printf("%s character is '%s'.\n", ct->name, control(*(ct->charp)));
998 }
999 slc_check();
1000 return 1;
1001 }
1002
1003 static int
1004 unsetcmd(int argc, char *argv[])
1005 {
1006 struct setlist *ct;
1007 struct togglelist *c;
1008 char *name;
1009
1010 if (argc < 2) {
1011 fprintf(stderr,
1012 "Need an argument to 'unset' command. 'unset ?' for help.\n");
1013 return 0;
1014 }
1015 if (isprefix(argv[1], "?") || isprefix(argv[1], "help")) {
1016 for (ct = Setlist; ct->name; ct++)
1017 printf("%-15s %s\n", ct->name, ct->help);
1018 printf("\n");
1019 settogglehelp(0);
1020 printf("%-15s %s\n", "?", "display help information");
1021 return 0;
1022 }
1023
1024 argc--;
1025 argv++;
1026 while (argc--) {
1027 name = *argv++;
1028 ct = getset(name);
1029 if (ct == 0) {
1030 c = GETTOGGLE(name);
1031 if (c == 0) {
1032 fprintf(stderr, "'%s': unknown argument ('unset ?' for help).\n",
1033 name);
1034 return 0;
1035 } else if (Ambiguous(c)) {
1036 fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\n",
1037 name);
1038 return 0;
1039 }
1040 if (c->variable) {
1041 *c->variable = 0;
1042 if (c->actionexplanation) {
1043 printf("%s %s.\n", *c->variable? "Will" : "Won't",
1044 c->actionexplanation);
1045 }
1046 }
1047 if (c->handler)
1048 (*c->handler)(0);
1049 } else if (Ambiguous(ct)) {
1050 fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\n",
1051 name);
1052 return 0;
1053 } else if (ct->handler) {
1054 (*ct->handler)(0);
1055 printf("%s reset to \"%s\".\n", ct->name, (char *)ct->charp);
1056 } else {
1057 *(ct->charp) = _POSIX_VDISABLE;
1058 printf("%s character is '%s'.\n", ct->name, control(*(ct->charp)));
1059 }
1060 }
1061 return 1;
1062 }
1063 \f
1064 /*
1065 * The following are the data structures and routines for the
1066 * 'mode' command.
1067 */
1068 #ifdef KLUDGELINEMODE
1069 extern int kludgelinemode;
1070
1071 static int
1072 dokludgemode(int n)
1073 {
1074 kludgelinemode = 1;
1075 send_wont(TELOPT_LINEMODE, 1);
1076 send_dont(TELOPT_SGA, 1);
1077 send_dont(TELOPT_ECHO, 1);
1078 return 1;
1079 }
1080 #endif
1081
1082 static int
1083 dolinemode(int n)
1084 {
1085 #ifdef KLUDGELINEMODE
1086 if (kludgelinemode)
1087 send_dont(TELOPT_SGA, 1);
1088 #endif
1089 send_will(TELOPT_LINEMODE, 1);
1090 send_dont(TELOPT_ECHO, 1);
1091 return 1;
1092 }
1093
1094 static int
1095 docharmode(int n)
1096 {
1097 #ifdef KLUDGELINEMODE
1098 if (kludgelinemode)
1099 send_do(TELOPT_SGA, 1);
1100 else
1101 #endif
1102 send_wont(TELOPT_LINEMODE, 1);
1103 send_do(TELOPT_ECHO, 1);
1104 return 1;
1105 }
1106
1107 static int
1108 dolmmode(int bit, int on)
1109 {
1110 unsigned char c;
1111 extern int linemode;
1112
1113 if (my_want_state_is_wont(TELOPT_LINEMODE)) {
1114 printf("?Need to have LINEMODE option enabled first.\n");
1115 printf("'mode ?' for help.\n");
1116 return 0;
1117 }
1118
1119 if (on)
1120 c = (linemode | bit);
1121 else
1122 c = (linemode & ~bit);
1123 lm_mode(&c, 1, 1);
1124 return 1;
1125 }
1126
1127 int
1128 set_mode(int bit)
1129 {
1130 return dolmmode(bit, 1);
1131 }
1132
1133 int
1134 clear_mode(int bit)
1135 {
1136 return dolmmode(bit, 0);
1137 }
1138
1139 struct modelist {
1140 const char *name; /* command name */
1141 const char *help; /* help string */
1142 int (*handler) /* routine which executes command */
1143 (int);
1144 int needconnect; /* Do we need to be connected to execute? */
1145 int arg1;
1146 };
1147
1148 static struct modelist ModeList[] = {
1149 { "character", "Disable LINEMODE option", docharmode, 1, 0 },
1150 #ifdef KLUDGELINEMODE
1151 { "", "(or disable obsolete line-by-line mode)", 0, 0, 0 },
1152 #endif
1153 { "line", "Enable LINEMODE option", dolinemode, 1, 0 },
1154 #ifdef KLUDGELINEMODE
1155 { "", "(or enable obsolete line-by-line mode)", 0, 0, 0 },
1156 #endif
1157 { "", "", 0, 0, 0 },
1158 { "", "These require the LINEMODE option to be enabled", 0, 0, 0 },
1159 { "isig", "Enable signal trapping", set_mode, 1, MODE_TRAPSIG },
1160 { "+isig", 0, set_mode, 1, MODE_TRAPSIG },
1161 { "-isig", "Disable signal trapping", clear_mode, 1, MODE_TRAPSIG },
1162 { "edit", "Enable character editing", set_mode, 1, MODE_EDIT },
1163 { "+edit", 0, set_mode, 1, MODE_EDIT },
1164 { "-edit", "Disable character editing", clear_mode, 1, MODE_EDIT },
1165 { "softtabs", "Enable tab expansion", set_mode, 1, MODE_SOFT_TAB },
1166 { "+softtabs", 0, set_mode, 1, MODE_SOFT_TAB },
1167 { "-softtabs", "Disable character editing", clear_mode, 1, MODE_SOFT_TAB },
1168 { "litecho", "Enable literal character echo", set_mode, 1, MODE_LIT_ECHO },
1169 { "+litecho", 0, set_mode, 1, MODE_LIT_ECHO },
1170 { "-litecho", "Disable literal character echo", clear_mode, 1, MODE_LIT_ECHO },
1171 { "help", 0, modehelp, 0, 0 },
1172 #ifdef KLUDGELINEMODE
1173 { "kludgeline", 0, dokludgemode, 1, 0 },
1174 #endif
1175 { "", "", 0, 0, 0 },
1176 { "?", "Print help information", modehelp, 0, 0 },
1177 { .name = 0 },
1178 };
1179
1180
1181 int
1182 modehelp(int n)
1183 {
1184 struct modelist *mt;
1185
1186 printf("format is: 'mode Mode', where 'Mode' is one of:\n\n");
1187 for (mt = ModeList; mt->name; mt++) {
1188 if (mt->help) {
1189 if (*mt->help)
1190 printf("%-15s %s\n", mt->name, mt->help);
1191 else
1192 printf("\n");
1193 }
1194 }
1195 return 0;
1196 }
1197
1198 #define GETMODECMD(name) (struct modelist *) \
1199 genget(name, (char **) ModeList, sizeof(struct modelist))
1200
1201 static int
1202 modecmd(int argc, char *argv[])
1203 {
1204 struct modelist *mt;
1205
1206 if (argc != 2) {
1207 printf("'mode' command requires an argument\n");
1208 printf("'mode ?' for help.\n");
1209 } else if ((mt = GETMODECMD(argv[1])) == 0) {
1210 fprintf(stderr, "Unknown mode '%s' ('mode ?' for help).\n", argv[1]);
1211 } else if (Ambiguous(mt)) {
1212 fprintf(stderr, "Ambiguous mode '%s' ('mode ?' for help).\n", argv[1]);
1213 } else if (mt->needconnect && !connected) {
1214 printf("?Need to be connected first.\n");
1215 printf("'mode ?' for help.\n");
1216 } else if (mt->handler) {
1217 return (*mt->handler)(mt->arg1);
1218 }
1219 return 0;
1220 }
1221 \f
1222 /*
1223 * The following data structures and routines implement the
1224 * "display" command.
1225 */
1226
1227 static int
1228 display(int argc, char *argv[])
1229 {
1230 struct togglelist *tl;
1231 struct setlist *sl;
1232
1233 #define dotog(tl) if (tl->variable && tl->actionexplanation) { \
1234 if (*tl->variable) { \
1235 printf("will"); \
1236 } else { \
1237 printf("won't"); \
1238 } \
1239 printf(" %s.\n", tl->actionexplanation); \
1240 }
1241
1242 #define doset(sl) if (sl->name && *sl->name != ' ') { \
1243 if (sl->handler == 0) \
1244 printf("%-15s [%s]\n", sl->name, control(*sl->charp)); \
1245 else \
1246 printf("%-15s \"%s\"\n", sl->name, (char *)sl->charp); \
1247 }
1248
1249 if (argc == 1) {
1250 for (tl = Togglelist; tl->name; tl++) {
1251 dotog(tl);
1252 }
1253 printf("\n");
1254 for (sl = Setlist; sl->name; sl++) {
1255 doset(sl);
1256 }
1257 } else {
1258 int i;
1259
1260 for (i = 1; i < argc; i++) {
1261 sl = getset(argv[i]);
1262 tl = GETTOGGLE(argv[i]);
1263 if (Ambiguous(sl) || Ambiguous(tl)) {
1264 printf("?Ambiguous argument '%s'.\n", argv[i]);
1265 return 0;
1266 } else if (!sl && !tl) {
1267 printf("?Unknown argument '%s'.\n", argv[i]);
1268 return 0;
1269 } else {
1270 if (tl) {
1271 dotog(tl);
1272 }
1273 if (sl) {
1274 doset(sl);
1275 }
1276 }
1277 }
1278 }
1279 /*@*/optionstatus();
1280 #ifdef ENCRYPTION
1281 EncryptStatus();
1282 #endif /* ENCRYPTION */
1283 return 1;
1284 #undef doset
1285 #undef dotog
1286 }
1287 \f
1288 /*
1289 * The following are the data structures, and many of the routines,
1290 * relating to command processing.
1291 */
1292
1293 /*
1294 * Set the escape character.
1295 */
1296 static int
1297 setescape(int argc, char *argv[])
1298 {
1299 char *arg;
1300 char buf[50];
1301
1302 printf(
1303 "Deprecated usage - please use 'set escape%s%s' in the future.\n",
1304 (argc > 2)? " ":"", (argc > 2)? argv[1]: "");
1305 if (argc > 2)
1306 arg = argv[1];
1307 else {
1308 printf("new escape character: ");
1309 (void) fgets(buf, sizeof(buf), stdin);
1310 arg = buf;
1311 }
1312 if (arg[0] != '\0')
1313 escape = arg[0];
1314 if (!In3270) {
1315 printf("Escape character is '%s'.\n", control(escape));
1316 }
1317 (void) fflush(stdout);
1318 return 1;
1319 }
1320
1321 /*VARARGS*/
1322 static int
1323 togcrmod(int argc, char *argv[])
1324 {
1325 crmod = !crmod;
1326 printf("Deprecated usage - please use 'toggle crmod' in the future.\n");
1327 printf("%s map carriage return on output.\n", crmod ? "Will" : "Won't");
1328 (void) fflush(stdout);
1329 return 1;
1330 }
1331
1332 /*VARARGS*/
1333 int
1334 suspend(int argc, char *argv[])
1335 {
1336 setcommandmode();
1337 {
1338 long oldrows, oldcols, newrows, newcols, err;
1339
1340 err = (TerminalWindowSize(&oldrows, &oldcols) == 0) ? 1 : 0;
1341 (void) kill(0, SIGTSTP);
1342 /*
1343 * If we didn't get the window size before the SUSPEND, but we
1344 * can get them now (?), then send the NAWS to make sure that
1345 * we are set up for the right window size.
1346 */
1347 if (TerminalWindowSize(&newrows, &newcols) && connected &&
1348 (err || ((oldrows != newrows) || (oldcols != newcols)))) {
1349 sendnaws();
1350 }
1351 }
1352 /* reget parameters in case they were changed */
1353 TerminalSaveState();
1354 setconnmode(0);
1355 return 1;
1356 }
1357
1358 #ifndef TN3270
1359 /*ARGSUSED*/
1360 int
1361 shell(int argc, char *argv[])
1362 {
1363 long oldrows, oldcols, newrows, newcols;
1364 long volatile err; /* Avoid vfork clobbering */
1365
1366 setcommandmode();
1367
1368 err = (TerminalWindowSize(&oldrows, &oldcols) == 0) ? 1 : 0;
1369 switch(vfork()) {
1370 case -1:
1371 perror("Fork failed");
1372 break;
1373
1374 case 0:
1375 {
1376 /*
1377 * Fire up the shell in the child.
1378 */
1379 const char *shellp, *shellname;
1380
1381 shellp = getenv("SHELL");
1382 if (shellp == NULL)
1383 shellp = "/bin/sh";
1384 if ((shellname = strrchr(shellp, '/')) == 0)
1385 shellname = shellp;
1386 else
1387 shellname++;
1388 if (argc > 1)
1389 execl(shellp, shellname, "-c", &saveline[1], NULL);
1390 else
1391 execl(shellp, shellname, NULL);
1392 perror("execl");
1393 _exit(1);
1394 }
1395 default:
1396 (void)wait((int *)0); /* Wait for the shell to complete */
1397
1398 if (TerminalWindowSize(&newrows, &newcols) && connected &&
1399 (err || ((oldrows != newrows) || (oldcols != newcols)))) {
1400 sendnaws();
1401 }
1402 break;
1403 }
1404 return 1;
1405 }
1406 #endif /* !defined(TN3270) */
1407
1408 /*VARARGS*/
1409 static int
1410 bye(int argc, char *argv[])
1411 {
1412 extern int resettermname;
1413
1414 if (connected) {
1415 (void) shutdown(net, 2);
1416 printf("Connection closed.\n");
1417 (void) NetClose(net);
1418 connected = 0;
1419 resettermname = 1;
1420 #if defined(AUTHENTICATION) || defined(ENCRYPTION)
1421 auth_encrypt_connect(connected);
1422 #endif /* defined(AUTHENTICATION) */
1423 /* reset options */
1424 tninit();
1425 #ifdef TN3270
1426 SetIn3270(); /* Get out of 3270 mode */
1427 #endif /* defined(TN3270) */
1428 }
1429 if ((argc != 2) || (strcmp(argv[1], "fromquit") != 0)) {
1430 longjmp(toplevel, 1);
1431 /* NOTREACHED */
1432 }
1433 return 1; /* Keep lint, etc., happy */
1434 }
1435
1436 /*VARARGS*/
1437 int
1438 quit(int argc, char *argv[])
1439 {
1440 (void) call(bye, "bye", "fromquit", 0);
1441 Exit(0);
1442 /*NOTREACHED*/
1443 }
1444
1445 /*VARARGS*/
1446 int
1447 logout(int argc, char *argv[])
1448 {
1449 send_do(TELOPT_LOGOUT, 1);
1450 (void) netflush();
1451 return 1;
1452 }
1453
1454 \f
1455 /*
1456 * The SLC command.
1457 */
1458
1459 struct slclist {
1460 const char *name;
1461 const char *help;
1462 void (*handler)(int);
1463 int arg;
1464 };
1465
1466 struct slclist SlcList[] = {
1467 { "export", "Use local special character definitions",
1468 slc_mode_export, 0 },
1469 { "import", "Use remote special character definitions",
1470 slc_mode_import, 1 },
1471 { "check", "Verify remote special character definitions",
1472 slc_mode_import, 0 },
1473 { "help", 0, slc_help, 0 },
1474 { "?", "Print help information", slc_help, 0 },
1475 { .name = 0 },
1476 };
1477
1478 static void
1479 slc_help(int n)
1480 {
1481 struct slclist *c;
1482
1483 for (c = SlcList; c->name; c++) {
1484 if (c->help) {
1485 if (*c->help)
1486 printf("%-15s %s\n", c->name, c->help);
1487 else
1488 printf("\n");
1489 }
1490 }
1491 }
1492
1493 static struct slclist *
1494 getslc(char *name)
1495 {
1496 return (struct slclist *)
1497 genget(name, (char **) SlcList, sizeof(struct slclist));
1498 }
1499
1500 static int
1501 slccmd(int argc, char *argv[])
1502 {
1503 struct slclist *c;
1504
1505 if (argc != 2) {
1506 fprintf(stderr,
1507 "Need an argument to 'slc' command. 'slc ?' for help.\n");
1508 return 0;
1509 }
1510 c = getslc(argv[1]);
1511 if (c == 0) {
1512 fprintf(stderr, "'%s': unknown argument ('slc ?' for help).\n",
1513 argv[1]);
1514 return 0;
1515 }
1516 if (Ambiguous(c)) {
1517 fprintf(stderr, "'%s': ambiguous argument ('slc ?' for help).\n",
1518 argv[1]);
1519 return 0;
1520 }
1521 (*c->handler)(c->arg);
1522 slcstate();
1523 return 1;
1524 }
1525 \f
1526 /*
1527 * The ENVIRON command.
1528 */
1529
1530 struct envlist {
1531 const char *name;
1532 const char *help;
1533 struct env_lst *(*handler)(const unsigned char *, unsigned char *);
1534 int narg;
1535 };
1536
1537 struct envlist EnvList[] = {
1538 { "define", "Define an environment variable",
1539 env_define, 2 },
1540 { "undefine", "Undefine an environment variable",
1541 env_undefine, 1 },
1542 { "export", "Mark an environment variable for automatic export",
1543 env_export, 1 },
1544 { "unexport", "Don't mark an environment variable for automatic export",
1545 env_unexport, 1 },
1546 { "send", "Send an environment variable", env_send, 1 },
1547 { "list", "List the current environment variables",
1548 env_list, 0 },
1549 #if defined(OLD_ENVIRON) && defined(ENV_HACK)
1550 { "varval", "Reverse VAR and VALUE (auto, right, wrong, status)",
1551 env_varval, 1 },
1552 #endif
1553 { "help", 0, env_help, 0 },
1554 { "?", "Print help information", env_help, 0 },
1555 { .name = 0 },
1556 };
1557
1558 static struct env_lst *
1559 env_help(const unsigned char *us1, unsigned char *us2)
1560 {
1561 struct envlist *c;
1562
1563 for (c = EnvList; c->name; c++) {
1564 if (c->help) {
1565 if (*c->help)
1566 printf("%-15s %s\n", c->name, c->help);
1567 else
1568 printf("\n");
1569 }
1570 }
1571 return NULL;
1572 }
1573
1574 static struct envlist *
1575 getenvcmd(char *name)
1576 {
1577 return (struct envlist *)
1578 genget(name, (char **) EnvList, sizeof(struct envlist));
1579 }
1580
1581 int
1582 env_cmd(int argc, char *argv[])
1583 {
1584 struct envlist *c;
1585
1586 if (argc < 2) {
1587 fprintf(stderr,
1588 "Need an argument to 'environ' command. 'environ ?' for help.\n");
1589 return 0;
1590 }
1591 c = getenvcmd(argv[1]);
1592 if (c == 0) {
1593 fprintf(stderr, "'%s': unknown argument ('environ ?' for help).\n",
1594 argv[1]);
1595 return 0;
1596 }
1597 if (Ambiguous(c)) {
1598 fprintf(stderr, "'%s': ambiguous argument ('environ ?' for help).\n",
1599 argv[1]);
1600 return 0;
1601 }
1602 if (c->narg + 2 != argc) {
1603 fprintf(stderr,
1604 "Need %s%d argument%s to 'environ %s' command. 'environ ?' for help.\n",
1605 c->narg < argc + 2 ? "only " : "",
1606 c->narg, c->narg == 1 ? "" : "s", c->name);
1607 return 0;
1608 }
1609 (*c->handler)(argv[2], argv[3]);
1610 return 1;
1611 }
1612
1613 struct env_lst {
1614 struct env_lst *next; /* pointer to next structure */
1615 struct env_lst *prev; /* pointer to previous structure */
1616 unsigned char *var; /* pointer to variable name */
1617 unsigned char *value; /* pointer to variable value */
1618 int export; /* 1 -> export with default list of variables */
1619 int welldefined; /* A well defined variable */
1620 };
1621
1622 struct env_lst envlisthead;
1623
1624 struct env_lst *
1625 env_find(const unsigned char *var)
1626 {
1627 struct env_lst *ep;
1628
1629 for (ep = envlisthead.next; ep; ep = ep->next) {
1630 if (strcmp((const char *)ep->var, (const char *)var) == 0)
1631 return(ep);
1632 }
1633 return(NULL);
1634 }
1635
1636 void
1637 env_init(void)
1638 {
1639 extern char **environ;
1640 char **epp, *cp;
1641 struct env_lst *ep;
1642
1643 for (epp = environ; *epp; epp++) {
1644 if ((cp = strchr(*epp, '=')) != NULL) {
1645 *cp = '\0';
1646 ep = env_define((unsigned char *)*epp,
1647 (unsigned char *)cp+1);
1648 ep->export = 0;
1649 *cp = '=';
1650 }
1651 }
1652 /*
1653 * Special case for DISPLAY variable. If it is ":0.0" or
1654 * "unix:0.0", we have to get rid of "unix" and insert our
1655 * hostname.
1656 */
1657 if ((ep = env_find("DISPLAY"))
1658 && ((*ep->value == ':')
1659 || (strncmp((char *)ep->value, "unix:", 5) == 0))) {
1660 char hbuf[MAXHOSTNAMELEN + 1];
1661 char *cp2 = strchr((char *)ep->value, ':');
1662
1663 gethostname(hbuf, sizeof hbuf);
1664 hbuf[sizeof(hbuf) - 1] = '\0';
1665 cp = (char *)malloc(strlen(hbuf) + strlen(cp2) + 1);
1666 sprintf((char *)cp, "%s%s", hbuf, cp2);
1667 free(ep->value);
1668 ep->value = (unsigned char *)cp;
1669 }
1670 /*
1671 * If USER is not defined, but LOGNAME is, then add
1672 * USER with the value from LOGNAME. By default, we
1673 * don't export the USER variable.
1674 */
1675 if ((env_find("USER") == NULL) && (ep = env_find("LOGNAME"))) {
1676 env_define((const unsigned char *)"USER", ep->value);
1677 env_unexport((const unsigned char *)"USER", NULL);
1678 }
1679 env_export((const unsigned char *)"DISPLAY", NULL);
1680 env_export((const unsigned char *)"PRINTER", NULL);
1681 }
1682
1683 struct env_lst *
1684 env_define(const unsigned char *var, unsigned char *value)
1685 {
1686 struct env_lst *ep;
1687
1688 if ((ep = env_find(var)) != NULL) {
1689 if (ep->var)
1690 free(ep->var);
1691 if (ep->value)
1692 free(ep->value);
1693 } else {
1694 ep = (struct env_lst *)malloc(sizeof(struct env_lst));
1695 ep->next = envlisthead.next;
1696 envlisthead.next = ep;
1697 ep->prev = &envlisthead;
1698 if (ep->next)
1699 ep->next->prev = ep;
1700 }
1701 ep->welldefined = opt_welldefined(var);
1702 ep->export = 1;
1703 ep->var = (unsigned char *)strdup((const char *)var);
1704 ep->value = (unsigned char *)strdup((const char *)value);
1705 return(ep);
1706 }
1707
1708 struct env_lst *
1709 env_undefine(const unsigned char *var, unsigned char *d)
1710 {
1711 struct env_lst *ep;
1712
1713 if ((ep = env_find(var)) != NULL) {
1714 ep->prev->next = ep->next;
1715 if (ep->next)
1716 ep->next->prev = ep->prev;
1717 if (ep->var)
1718 free(ep->var);
1719 if (ep->value)
1720 free(ep->value);
1721 free(ep);
1722 }
1723 return NULL;
1724 }
1725
1726 struct env_lst *
1727 env_export(const unsigned char *var, unsigned char *d)
1728 {
1729 struct env_lst *ep;
1730
1731 if ((ep = env_find(var)) != NULL)
1732 ep->export = 1;
1733 return NULL;
1734 }
1735
1736 struct env_lst *
1737 env_unexport(const unsigned char *var, unsigned char *d)
1738 {
1739 struct env_lst *ep;
1740
1741 if ((ep = env_find(var)) != NULL)
1742 ep->export = 0;
1743 return NULL;
1744 }
1745
1746 struct env_lst *
1747 env_send(const unsigned char *var, unsigned char *d)
1748 {
1749 struct env_lst *ep;
1750
1751 if (my_state_is_wont(TELOPT_NEW_ENVIRON)
1752 #ifdef OLD_ENVIRON
1753 && my_state_is_wont(TELOPT_OLD_ENVIRON)
1754 #endif
1755 ) {
1756 fprintf(stderr,
1757 "Cannot send '%s': Telnet ENVIRON option not enabled\n",
1758 var);
1759 return NULL;
1760 }
1761 ep = env_find(var);
1762 if (ep == 0) {
1763 fprintf(stderr, "Cannot send '%s': variable not defined\n",
1764 var);
1765 return NULL;
1766 }
1767 env_opt_start_info();
1768 env_opt_add(ep->var);
1769 env_opt_end(0);
1770 return NULL;
1771 }
1772
1773 struct env_lst *
1774 env_list(const unsigned char *d1, unsigned char *d2)
1775 {
1776 struct env_lst *ep;
1777
1778 for (ep = envlisthead.next; ep; ep = ep->next) {
1779 printf("%c %-20s %s\n", ep->export ? '*' : ' ',
1780 ep->var, ep->value);
1781 }
1782 return NULL;
1783 }
1784
1785 unsigned char *
1786 env_default(int init, int welldefined)
1787 {
1788 static struct env_lst *nep = NULL;
1789
1790 if (init) {
1791 nep = &envlisthead;
1792 return NULL;
1793 }
1794 if (nep) {
1795 while ((nep = nep->next) != NULL) {
1796 if (nep->export && (nep->welldefined == welldefined))
1797 return(nep->var);
1798 }
1799 }
1800 return(NULL);
1801 }
1802
1803 unsigned char *
1804 env_getvalue(const unsigned char *var)
1805 {
1806 struct env_lst *ep;
1807
1808 if ((ep = env_find(var)) != NULL)
1809 return(ep->value);
1810 return(NULL);
1811 }
1812
1813 #if defined(OLD_ENVIRON) && defined(ENV_HACK)
1814 void
1815 env_varval(const unsigned char *what)
1816 {
1817 extern int old_env_var, old_env_value, env_auto;
1818 int len = strlen((char *)what);
1819
1820 if (len == 0)
1821 goto unknown;
1822
1823 if (strncasecmp((char *)what, "status", len) == 0) {
1824 if (env_auto)
1825 printf("%s%s", "VAR and VALUE are/will be ",
1826 "determined automatically\n");
1827 if (old_env_var == OLD_ENV_VAR)
1828 printf("VAR and VALUE set to correct definitions\n");
1829 else
1830 printf("VAR and VALUE definitions are reversed\n");
1831 } else if (strncasecmp((char *)what, "auto", len) == 0) {
1832 env_auto = 1;
1833 old_env_var = OLD_ENV_VALUE;
1834 old_env_value = OLD_ENV_VAR;
1835 } else if (strncasecmp((char *)what, "right", len) == 0) {
1836 env_auto = 0;
1837 old_env_var = OLD_ENV_VAR;
1838 old_env_value = OLD_ENV_VALUE;
1839 } else if (strncasecmp((char *)what, "wrong", len) == 0) {
1840 env_auto = 0;
1841 old_env_var = OLD_ENV_VALUE;
1842 old_env_value = OLD_ENV_VAR;
1843 } else {
1844 unknown:
1845 printf("Unknown \"varval\" command. (\"auto\", \"right\", \"wrong\", \"status\")\n");
1846 }
1847 }
1848 #endif
1849
1850 #ifdef AUTHENTICATION
1851 /*
1852 * The AUTHENTICATE command.
1853 */
1854
1855 struct authlist {
1856 const char *name;
1857 const char *help;
1858 int (*handler)(char *);
1859 int narg;
1860 };
1861
1862 struct authlist AuthList[] = {
1863 { "status", "Display current status of authentication information",
1864 auth_status, 0 },
1865 { "disable", "Disable an authentication type ('auth disable ?' for more)",
1866 auth_disable, 1 },
1867 { "enable", "Enable an authentication type ('auth enable ?' for more)",
1868 auth_enable, 1 },
1869 { "help", 0, auth_help, 0 },
1870 { "?", "Print help information", auth_help, 0 },
1871 { .name = 0 },
1872 };
1873
1874 static int
1875 auth_help(char *s)
1876 {
1877 struct authlist *c;
1878
1879 for (c = AuthList; c->name; c++) {
1880 if (c->help) {
1881 if (*c->help)
1882 printf("%-15s %s\n", c->name, c->help);
1883 else
1884 printf("\n");
1885 }
1886 }
1887 return 0;
1888 }
1889
1890 int
1891 auth_cmd(int argc, char *argv[])
1892 {
1893 struct authlist *c;
1894
1895 if (argc < 2) {
1896 fprintf(stderr,
1897 "Need an argument to 'auth' command. 'auth ?' for help.\n");
1898 return 0;
1899 }
1900
1901 c = (struct authlist *)
1902 genget(argv[1], (char **) AuthList, sizeof(struct authlist));
1903 if (c == 0) {
1904 fprintf(stderr, "'%s': unknown argument ('auth ?' for help).\n",
1905 argv[1]);
1906 return 0;
1907 }
1908 if (Ambiguous(c)) {
1909 fprintf(stderr, "'%s': ambiguous argument ('auth ?' for help).\n",
1910 argv[1]);
1911 return 0;
1912 }
1913 if (c->narg + 2 != argc) {
1914 fprintf(stderr,
1915 "Need %s%d argument%s to 'auth %s' command. 'auth ?' for help.\n",
1916 c->narg < argc + 2 ? "only " : "",
1917 c->narg, c->narg == 1 ? "" : "s", c->name);
1918 return 0;
1919 }
1920 return((*c->handler)(argv[2]));
1921 }
1922 #endif
1923
1924 #ifdef ENCRYPTION
1925 /*
1926 * The ENCRYPT command.
1927 */
1928
1929 struct encryptlist {
1930 const char *name;
1931 const char *help;
1932 int (*handler)(char *, char *);
1933 int needconnect;
1934 int minarg;
1935 int maxarg;
1936 };
1937
1938 static int
1939 EncryptHelp(char *, char *);
1940 typedef int (*encrypthandler)(char *, char *);
1941
1942 struct encryptlist EncryptList[] = {
1943 { "enable", "Enable encryption. ('encrypt enable ?' for more)",
1944 EncryptEnable, 1, 1, 2 },
1945 { "disable", "Disable encryption. ('encrypt enable ?' for more)",
1946 EncryptDisable, 0, 1, 2 },
1947 { "type", "Set encryption type. ('encrypt type ?' for more)",
1948 EncryptType, 0, 1, 1 },
1949 { "start", "Start encryption. ('encrypt start ?' for more)",
1950 (encrypthandler) EncryptStart, 1, 0, 1 },
1951 { "stop", "Stop encryption. ('encrypt stop ?' for more)",
1952 (encrypthandler) EncryptStop, 1, 0, 1 },
1953 { "input", "Start encrypting the input stream",
1954 (encrypthandler) EncryptStartInput, 1, 0, 0 },
1955 { "-input", "Stop encrypting the input stream",
1956 (encrypthandler) EncryptStopInput, 1, 0, 0 },
1957 { "output", "Start encrypting the output stream",
1958 (encrypthandler) EncryptStartOutput, 1, 0, 0 },
1959 { "-output", "Stop encrypting the output stream",
1960 (encrypthandler) EncryptStopOutput, 1, 0, 0 },
1961
1962 { "status", "Display current status of authentication information",
1963 (encrypthandler) EncryptStatus, 0, 0, 0 },
1964 { "help", 0, EncryptHelp, 0, 0, 0 },
1965 { "?", "Print help information", EncryptHelp, 0, 0, 0 },
1966 { .name = 0 },
1967 };
1968
1969 static int
1970 EncryptHelp(char *s1, char *s2)
1971 {
1972 struct encryptlist *c;
1973
1974 for (c = EncryptList; c->name; c++) {
1975 if (c->help) {
1976 if (*c->help)
1977 printf("%-15s %s\n", c->name, c->help);
1978 else
1979 printf("\n");
1980 }
1981 }
1982 return (0);
1983 }
1984
1985 int
1986 encrypt_cmd(int argc, char *argv[])
1987 {
1988 struct encryptlist *c;
1989
1990 if (argc < 2) {
1991 fprintf(stderr,
1992 "Need an argument to 'encrypt' command. "
1993 "'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 == NULL) {
2000 fprintf(stderr,
2001 "'%s': unknown argument ('encrypt ?' for help).\n",
2002 argv[1]);
2003 return (0);
2004 }
2005 if (Ambiguous(c)) {
2006 fprintf(stderr,
2007 "'%s': ambiguous argument ('encrypt ?' for help).\n",
2008 argv[1]);
2009 return (0);
2010 }
2011 argc -= 2;
2012 if (argc < c->minarg || argc > c->maxarg) {
2013 if (c->minarg == c->maxarg) {
2014 fprintf(stderr, "Need %s%d argument%s ",
2015 c->minarg < argc ? "only " : "", c->minarg,
2016 c->minarg == 1 ? "" : "s");
2017 } else {
2018 fprintf(stderr, "Need %s%d-%d arguments ",
2019 c->maxarg < argc ? "only " : "", c->minarg,
2020 c->maxarg);
2021 }
2022 fprintf(stderr,
2023 "to 'encrypt %s' command. 'encrypt ?' for help.\n",
2024 c->name);
2025 return (0);
2026 }
2027 if (c->needconnect && !connected) {
2028 if (!(argc && (isprefix(argv[2], "help") ||
2029 isprefix(argv[2], "?")))) {
2030 printf("?Need to be connected first.\n");
2031 return (0);
2032 }
2033 }
2034 return ((*c->handler)(argv[2], argv[3]));
2035 }
2036 #endif /* ENCRYPTION */
2037
2038 #ifdef TN3270
2039 static void
2040 filestuff(int fd)
2041 {
2042 int res;
2043
2044 setconnmode(0);
2045 res = fcntl(fd, F_GETOWN, 0);
2046 setcommandmode();
2047
2048 if (res == -1) {
2049 perror("fcntl");
2050 return;
2051 }
2052 printf("\tOwner is %d.\n", res);
2053
2054 setconnmode(0);
2055 res = fcntl(fd, F_GETFL, 0);
2056 setcommandmode();
2057
2058 if (res == -1) {
2059 perror("fcntl");
2060 return;
2061 }
2062 #ifdef notdef
2063 printf("\tFlags are 0x%x: %s\n", res, decodeflags(res));
2064 #endif
2065 }
2066 #endif /* defined(TN3270) */
2067
2068 /*
2069 * Print status about the connection.
2070 */
2071 /*ARGSUSED*/
2072 static int
2073 status(int argc, char *argv[])
2074 {
2075 if (connected) {
2076 printf("Connected to %s.\n", hostname);
2077 if ((argc < 2) || strcmp(argv[1], "notmuch")) {
2078 int mode = getconnmode();
2079
2080 if (my_want_state_is_will(TELOPT_LINEMODE)) {
2081 printf("Operating with LINEMODE option\n");
2082 printf("%s line editing\n", (mode&MODE_EDIT) ? "Local" : "No");
2083 printf("%s catching of signals\n",
2084 (mode&MODE_TRAPSIG) ? "Local" : "No");
2085 slcstate();
2086 #ifdef KLUDGELINEMODE
2087 } else if (kludgelinemode && my_want_state_is_dont(TELOPT_SGA)) {
2088 printf("Operating in obsolete linemode\n");
2089 #endif
2090 } else {
2091 printf("Operating in single character mode\n");
2092 if (localchars)
2093 printf("Catching signals locally\n");
2094 }
2095 printf("%s character echo\n", (mode&MODE_ECHO) ? "Local" : "Remote");
2096 if (my_want_state_is_will(TELOPT_LFLOW))
2097 printf("%s flow control\n", (mode&MODE_FLOW) ? "Local" : "No");
2098 #ifdef ENCRYPTION
2099 encrypt_display();
2100 #endif /* ENCRYPTION */
2101 }
2102 } else {
2103 printf("No connection.\n");
2104 }
2105 # ifndef TN3270
2106 printf("Escape character is '%s'.\n", control(escape));
2107 (void) fflush(stdout);
2108 # else /* !defined(TN3270) */
2109 if ((!In3270) && ((argc < 2) || strcmp(argv[1], "notmuch"))) {
2110 printf("Escape character is '%s'.\n", control(escape));
2111 }
2112 if ((argc >= 2) && !strcmp(argv[1], "everything")) {
2113 printf("SIGIO received %d time%s.\n",
2114 sigiocount, (sigiocount == 1)? "":"s");
2115 if (In3270) {
2116 printf("Process ID %d, process group %d.\n",
2117 getpid(), getpgrp());
2118 printf("Terminal input:\n");
2119 filestuff(tin);
2120 printf("Terminal output:\n");
2121 filestuff(tout);
2122 printf("Network socket:\n");
2123 filestuff(net);
2124 }
2125 }
2126 if (In3270 && transcom) {
2127 printf("Transparent mode command is '%s'.\n", transcom);
2128 }
2129 (void) fflush(stdout);
2130 if (In3270) {
2131 return 0;
2132 }
2133 # endif /* defined(TN3270) */
2134 return 1;
2135 }
2136
2137 /*
2138 * Function that gets called when SIGINFO is received.
2139 */
2140 int
2141 ayt_status(void)
2142 {
2143 return call(status, "status", "notmuch", 0);
2144 }
2145
2146 static const char *
2147 sockaddr_ntop(struct sockaddr *sa)
2148 {
2149 static char addrbuf[NI_MAXHOST];
2150 const int niflags = NI_NUMERICHOST;
2151
2152 if (getnameinfo(sa, sa->sa_len, addrbuf, sizeof(addrbuf),
2153 NULL, 0, niflags) == 0)
2154 return addrbuf;
2155 else
2156 return NULL;
2157 }
2158
2159 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
2160 static int setpolicy (int, struct addrinfo *, char *);
2161
2162 static int
2163 setpolicy(int netw, struct addrinfo *res, char *policy)
2164 {
2165 char *buf;
2166 int level;
2167 int optname;
2168
2169 if (policy == NULL)
2170 return 0;
2171
2172 buf = ipsec_set_policy(policy, strlen(policy));
2173 if (buf == NULL) {
2174 printf("%s\n", ipsec_strerror());
2175 return -1;
2176 }
2177 level = res->ai_family == AF_INET ? IPPROTO_IP : IPPROTO_IPV6;
2178 optname = res->ai_family == AF_INET ? IP_IPSEC_POLICY : IPV6_IPSEC_POLICY;
2179 if (setsockopt(netw, level, optname, buf, ipsec_get_policylen(buf)) < 0){
2180 perror("setsockopt");
2181 return -1;
2182 }
2183
2184 free(buf);
2185 return 0;
2186 }
2187 #endif
2188
2189 int
2190 tn(int argc, char *argv[])
2191 {
2192 struct addrinfo hints, *res, *res0;
2193 const char *cause = "telnet: unknown";
2194 int error;
2195 #if defined(IP_OPTIONS) && defined(IPPROTO_IP)
2196 char *srp = 0;
2197 long srlen;
2198 int proto, opt;
2199 #endif
2200 char *cmd, *hostp = 0;
2201 const char *portp = 0;
2202 const char *user = 0;
2203
2204 if (connected) {
2205 printf("?Already connected to %s\n", hostname);
2206 return 0;
2207 }
2208 if (argc < 2) {
2209 (void) strlcpy(line, "open ", sizeof(line));
2210 printf("(to) ");
2211 (void) fgets(&line[strlen(line)], sizeof(line) - strlen(line), stdin);
2212 makeargv();
2213 argc = margc;
2214 argv = margv;
2215 }
2216 cmd = *argv;
2217 --argc; ++argv;
2218 while (argc) {
2219 if (strcmp(*argv, "help") == 0 || isprefix(*argv, "?"))
2220 goto usage;
2221 if (strcmp(*argv, "-l") == 0) {
2222 --argc; ++argv;
2223 if (argc == 0)
2224 goto usage;
2225 user = *argv++;
2226 --argc;
2227 continue;
2228 }
2229 if (strcmp(*argv, "-a") == 0) {
2230 --argc; ++argv;
2231 autologin = 1;
2232 continue;
2233 }
2234 if (hostp == 0) {
2235 hostp = *argv++;
2236 --argc;
2237 continue;
2238 }
2239 if (portp == 0) {
2240 portp = *argv++;
2241 --argc;
2242 continue;
2243 }
2244 usage:
2245 printf("usage: %s [-l user] [-a] host-name [port]\n", cmd);
2246 return 0;
2247 }
2248 if (hostp == 0)
2249 goto usage;
2250
2251 (void) strlcpy(_hostname, hostp, sizeof(_hostname));
2252 if (hostp[0] == '@' || hostp[0] == '!') {
2253 char *p;
2254 hostname = NULL;
2255 for (p = hostp + 1; *p; p++) {
2256 if (*p == ',' || *p == '@')
2257 hostname = p;
2258 }
2259 if (hostname == NULL) {
2260 fprintf(stderr, "%s: bad source route specification\n", hostp);
2261 return 0;
2262 }
2263 *hostname++ = '\0';
2264 } else
2265 hostname = hostp;
2266
2267 if (!portp) {
2268 telnetport = 1;
2269 portp = "telnet";
2270 } else if (portp[0] == '-') {
2271 /* use telnet negotiation if port number/name preceded by minus sign */
2272 telnetport = 1;
2273 portp++;
2274 } else
2275 telnetport = 0;
2276
2277 memset(&hints, 0, sizeof(hints));
2278 hints.ai_family = family;
2279 hints.ai_socktype = SOCK_STREAM;
2280 hints.ai_protocol = 0;
2281 hints.ai_flags = AI_NUMERICHOST; /* avoid forward lookup */
2282 error = getaddrinfo(hostname, portp, &hints, &res0);
2283 if (!error) {
2284 /* numeric */
2285 if (doaddrlookup &&
2286 getnameinfo(res0->ai_addr, res0->ai_addrlen,
2287 _hostname, sizeof(_hostname), NULL, 0, NI_NAMEREQD) == 0)
2288 ; /* okay */
2289 else
2290 strlcpy(_hostname, hostname, sizeof(_hostname));
2291 } else {
2292 /* FQDN - try again with forward DNS lookup */
2293 memset(&hints, 0, sizeof(hints));
2294 hints.ai_family = family;
2295 hints.ai_socktype = SOCK_STREAM;
2296 hints.ai_protocol = 0;
2297 hints.ai_flags = AI_CANONNAME;
2298 error = getaddrinfo(hostname, portp, &hints, &res0);
2299 if (error == EAI_SERVICE) {
2300 fprintf(stderr, "tcp/%s: unknown service\n", portp);
2301 return 0;
2302 } else if (error) {
2303 fprintf(stderr, "%s: %s\n", hostname, gai_strerror(error));
2304 return 0;
2305 }
2306 if (res0->ai_canonname)
2307 (void)strlcpy(_hostname, res0->ai_canonname, sizeof(_hostname));
2308 else
2309 (void)strlcpy(_hostname, hostname, sizeof(_hostname));
2310 }
2311 hostname = _hostname;
2312
2313 net = -1;
2314 for (res = res0; res; res = res->ai_next) {
2315 printf("Trying %s...\n", sockaddr_ntop(res->ai_addr));
2316 net = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
2317 if (net < 0) {
2318 cause = "telnet: socket";
2319 continue;
2320 }
2321
2322 if (telnet_debug && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 1) < 0) {
2323 perror("setsockopt (SO_DEBUG)");
2324 }
2325 if (hostp[0] == '@' || hostp[0] == '!') {
2326 if ((srlen = sourceroute(res, hostp, &srp, &proto, &opt)) < 0) {
2327 (void) NetClose(net);
2328 net = -1;
2329 continue;
2330 }
2331 if (srp && setsockopt(net, proto, opt, srp, srlen) < 0)
2332 perror("setsockopt (source route)");
2333 }
2334
2335 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
2336 if (setpolicy(net, res, ipsec_policy_in) < 0) {
2337 (void) NetClose(net);
2338 net = -1;
2339 continue;
2340 }
2341 if (setpolicy(net, res, ipsec_policy_out) < 0) {
2342 (void) NetClose(net);
2343 net = -1;
2344 continue;
2345 }
2346 #endif
2347
2348 if (connect(net, res->ai_addr, res->ai_addrlen) < 0) {
2349 if (res->ai_next) {
2350 int oerrno = errno;
2351
2352 fprintf(stderr, "telnet: connect to address %s: ",
2353 sockaddr_ntop(res->ai_addr));
2354 errno = oerrno;
2355 perror((char *)0);
2356 }
2357 cause = "telnet: Unable to connect to remote host";
2358 (void) NetClose(net);
2359 net = -1;
2360 continue;
2361 }
2362
2363 connected++;
2364 #if defined(AUTHENTICATION) || defined(ENCRYPTION)
2365 auth_encrypt_connect(connected);
2366 #endif /* defined(AUTHENTICATION) || defined(ENCRYPTION) */
2367 break;
2368 }
2369 freeaddrinfo(res0);
2370 if (net < 0 || connected == 0) {
2371 perror(cause);
2372 return 0;
2373 }
2374
2375 cmdrc(hostp, hostname);
2376 if (autologin && user == NULL) {
2377 struct passwd *pw;
2378
2379 user = getenv("USER");
2380 if (user == NULL ||
2381 ((pw = getpwnam(user)) && pw->pw_uid != getuid())) {
2382 if ((pw = getpwuid(getuid())) != NULL)
2383 user = pw->pw_name;
2384 else
2385 user = NULL;
2386 }
2387 }
2388 if (user) {
2389 env_define((const unsigned char *)"USER", __UNCONST(user));
2390 env_export((const unsigned char *)"USER", NULL);
2391 }
2392 (void) call(status, "status", "notmuch", 0);
2393 telnet(user);
2394 (void) NetClose(net);
2395 ExitString("Connection closed by foreign host.\n",1);
2396 /*NOTREACHED*/
2397 }
2398
2399 #define HELPINDENT ((int)sizeof ("connect"))
2400
2401 static char
2402 openhelp[] = "connect to a site",
2403 closehelp[] = "close current connection",
2404 logouthelp[] = "forcibly logout remote user and close the connection",
2405 quithelp[] = "exit telnet",
2406 statushelp[] = "print status information",
2407 helphelp[] = "print help information",
2408 sendhelp[] = "transmit special characters ('send ?' for more)",
2409 sethelp[] = "set operating parameters ('set ?' for more)",
2410 unsethelp[] = "unset operating parameters ('unset ?' for more)",
2411 togglestring[] ="toggle operating parameters ('toggle ?' for more)",
2412 slchelp[] = "change state of special characters ('slc ?' for more)",
2413 displayhelp[] = "display operating parameters",
2414 #ifdef TN3270
2415 transcomhelp[] = "specify Unix command for transparent mode pipe",
2416 #endif /* defined(TN3270) */
2417 #ifdef AUTHENTICATION
2418 authhelp[] = "turn on (off) authentication ('auth ?' for more)",
2419 #endif
2420 #ifdef ENCRYPTION
2421 encrypthelp[] = "turn on (off) encryption ('encrypt ?' for more)",
2422 #endif /* ENCRYPTION */
2423 zhelp[] = "suspend telnet",
2424 shellhelp[] = "invoke a subshell",
2425 envhelp[] = "change environment variables ('environ ?' for more)",
2426 modestring[] = "try to enter line or character mode ('mode ?' for more)";
2427
2428 static Command cmdtab[] = {
2429 { "close", closehelp, bye, 1 },
2430 { "logout", logouthelp, logout, 1 },
2431 { "display", displayhelp, display, 0 },
2432 { "mode", modestring, modecmd, 0 },
2433 { "open", openhelp, tn, 0 },
2434 { "quit", quithelp, quit, 0 },
2435 { "send", sendhelp, sendcmd, 0 },
2436 { "set", sethelp, setcmd, 0 },
2437 { "unset", unsethelp, unsetcmd, 0 },
2438 { "status", statushelp, status, 0 },
2439 { "toggle", togglestring, toggle, 0 },
2440 { "slc", slchelp, slccmd, 0 },
2441 #ifdef TN3270
2442 { "transcom", transcomhelp, settranscom, 0 },
2443 #endif /* defined(TN3270) */
2444 #ifdef AUTHENTICATION
2445 { "auth", authhelp, auth_cmd, 0 },
2446 #endif
2447 #ifdef ENCRYPTION
2448 { "encrypt", encrypthelp, encrypt_cmd, 0 },
2449 #endif
2450 { "z", zhelp, suspend, 0 },
2451 #ifdef TN3270
2452 { "!", shellhelp, shell, 1 },
2453 #else
2454 { "!", shellhelp, shell, 0 },
2455 #endif
2456 { "environ", envhelp, env_cmd, 0 },
2457 { "?", helphelp, help, 0 },
2458 { NULL, NULL, NULL, 0 }
2459 };
2460
2461 static char crmodhelp[] = "deprecated command -- use 'toggle crmod' instead";
2462 static char escapehelp[] = "deprecated command -- use 'set escape' instead";
2463
2464 static Command cmdtab2[] = {
2465 { "help", 0, help, 0 },
2466 { "escape", escapehelp, setescape, 0 },
2467 { "crmod", crmodhelp, togcrmod, 0 },
2468 { NULL, NULL, NULL, 0 }
2469 };
2470
2471
2472 /*
2473 * Call routine with argc, argv set from args (terminated by 0).
2474 */
2475
2476 /*VARARGS1*/
2477 static int
2478 call(intrtn_t routine, ...)
2479 {
2480 va_list ap;
2481 char *args[100];
2482 int argno = 0;
2483
2484 va_start(ap, routine);
2485 while ((args[argno++] = va_arg(ap, char *)) != 0) {
2486 ;
2487 }
2488 va_end(ap);
2489 return (*routine)(argno-1, args);
2490 }
2491
2492
2493 static Command *
2494 getcmd(char *name)
2495 {
2496 Command *cm;
2497
2498 if ((cm = (Command *) genget(name, (char **) cmdtab, sizeof(Command))) != NULL)
2499 return cm;
2500 return (Command *) genget(name, (char **) cmdtab2, sizeof(Command));
2501 }
2502
2503 void
2504 command(int top, const char *tbuf, int cnt)
2505 {
2506 Command *c;
2507
2508 setcommandmode();
2509 if (!top) {
2510 putchar('\n');
2511 } else {
2512 (void) signal(SIGINT, SIG_DFL);
2513 (void) signal(SIGQUIT, SIG_DFL);
2514 }
2515 for (;;) {
2516 if (rlogin == _POSIX_VDISABLE)
2517 printf("%s> ", prompt);
2518 if (tbuf) {
2519 char *cp;
2520 cp = line;
2521 while (cnt > 0 && (*cp++ = *tbuf++) != '\n')
2522 cnt--;
2523 tbuf = 0;
2524 if (cp == line || *--cp != '\n' || cp == line)
2525 goto getline;
2526 *cp = '\0';
2527 if (rlogin == _POSIX_VDISABLE)
2528 printf("%s\n", line);
2529 } else {
2530 getline:
2531 if (rlogin != _POSIX_VDISABLE)
2532 printf("%s> ", prompt);
2533 #ifdef TN3270
2534 fflush(stdout);
2535 #endif
2536 if (fgets(line, sizeof(line), stdin) == NULL) {
2537 if (feof(stdin) || ferror(stdin)) {
2538 (void) quit(0, NULL);
2539 /*NOTREACHED*/
2540 }
2541 break;
2542 }
2543 }
2544 if (line[0] == 0)
2545 break;
2546 makeargv();
2547 if (margv[0] == 0) {
2548 break;
2549 }
2550 c = getcmd(margv[0]);
2551 if (Ambiguous(c)) {
2552 printf("?Ambiguous command\n");
2553 continue;
2554 }
2555 if (c == 0) {
2556 printf("?Invalid command\n");
2557 continue;
2558 }
2559 if (c->needconnect && !connected) {
2560 printf("?Need to be connected first.\n");
2561 continue;
2562 }
2563 if ((*c->handler)(margc, margv)) {
2564 break;
2565 }
2566 }
2567 if (!top) {
2568 if (!connected) {
2569 longjmp(toplevel, 1);
2570 /*NOTREACHED*/
2571 }
2572 #ifdef TN3270
2573 if (shell_active == 0) {
2574 setconnmode(0);
2575 }
2576 #else /* defined(TN3270) */
2577 setconnmode(0);
2578 #endif /* defined(TN3270) */
2579 }
2580 }
2581 \f
2582 /*
2583 * Help command.
2584 */
2585 static int
2586 help(int argc, char *argv[])
2587 {
2588 Command *c;
2589
2590 if (argc == 1) {
2591 printf("Commands may be abbreviated. Commands are:\n\n");
2592 for (c = cmdtab; c->name; c++)
2593 if (c->help) {
2594 printf("%-*s\t%s\n", HELPINDENT, c->name,
2595 c->help);
2596 }
2597 return 0;
2598 }
2599 while (--argc > 0) {
2600 char *arg;
2601 arg = *++argv;
2602 c = getcmd(arg);
2603 if (Ambiguous(c))
2604 printf("?Ambiguous help command %s\n", arg);
2605 else if (c == (Command *)0)
2606 printf("?Invalid help command %s\n", arg);
2607 else
2608 printf("%s\n", c->help);
2609 }
2610 return 0;
2611 }
2612
2613 static char *rcname = 0;
2614 static char rcbuf[128];
2615
2616 void
2617 cmdrc(const char *m1, const char *m2)
2618 {
2619 Command *c;
2620 FILE *rcfile;
2621 int gotmachine = 0;
2622 int l1 = strlen(m1);
2623 int l2 = strlen(m2);
2624 char m1save[MAXHOSTNAMELEN + 1];
2625
2626 if (skiprc)
2627 return;
2628
2629 strlcpy(m1save, m1, sizeof(m1save));
2630 m1 = m1save;
2631
2632 if (rcname == 0) {
2633 rcname = getenv("HOME");
2634 if (rcname)
2635 strlcpy(rcbuf, rcname, sizeof(rcbuf));
2636 else
2637 rcbuf[0] = '\0';
2638 strlcat(rcbuf, "/.telnetrc", sizeof(rcbuf));
2639 rcname = rcbuf;
2640 }
2641
2642 if ((rcfile = fopen(rcname, "r")) == 0) {
2643 return;
2644 }
2645
2646 for (;;) {
2647 if (fgets(line, sizeof(line), rcfile) == NULL)
2648 break;
2649 if (line[0] == 0)
2650 break;
2651 if (line[0] == '#')
2652 continue;
2653 if (gotmachine) {
2654 if (!isspace((unsigned char)line[0]))
2655 gotmachine = 0;
2656 }
2657 if (gotmachine == 0) {
2658 if (isspace((unsigned char)line[0]))
2659 continue;
2660 if (strncasecmp(line, m1, l1) == 0)
2661 strncpy(line, &line[l1], sizeof(line) - l1);
2662 else if (strncasecmp(line, m2, l2) == 0)
2663 strncpy(line, &line[l2], sizeof(line) - l2);
2664 else if (strncasecmp(line, "DEFAULT", 7) == 0)
2665 strncpy(line, &line[7], sizeof(line) - 7);
2666 else
2667 continue;
2668 if (line[0] != ' ' && line[0] != '\t' && line[0] != '\n')
2669 continue;
2670 gotmachine = 1;
2671 }
2672 makeargv();
2673 if (margv[0] == 0)
2674 continue;
2675 c = getcmd(margv[0]);
2676 if (Ambiguous(c)) {
2677 printf("?Ambiguous command: %s\n", margv[0]);
2678 continue;
2679 }
2680 if (c == 0) {
2681 printf("?Invalid command: %s\n", margv[0]);
2682 continue;
2683 }
2684 /*
2685 * This should never happen...
2686 */
2687 if (c->needconnect && !connected) {
2688 printf("?Need to be connected first for %s.\n", margv[0]);
2689 continue;
2690 }
2691 (*c->handler)(margc, margv);
2692 }
2693 fclose(rcfile);
2694 }
2695
2696 /*
2697 * Source route is handed in as
2698 * [!]@hop1@hop2...@dst
2699 *
2700 * If the leading ! is present, it is a strict source route, otherwise it is
2701 * assmed to be a loose source route. Note that leading ! is effective
2702 * only for IPv4 case.
2703 *
2704 * We fill in the source route option as
2705 * hop1,hop2,hop3...dest
2706 * and return a pointer to hop1, which will
2707 * be the address to connect() to.
2708 *
2709 * Arguments:
2710 * ai: The address (by struct addrinfo) for the final destination.
2711 *
2712 * arg: Pointer to route list to decipher
2713 *
2714 * cpp: Pointer to a pointer, so that sourceroute() can return
2715 * the address of result buffer (statically alloc'ed).
2716 *
2717 * protop/optp:
2718 * Pointer to an integer. The pointed variable
2719 * lenp: pointer to an integer that contains the
2720 * length of *cpp if *cpp != NULL.
2721 *
2722 * Return values:
2723 *
2724 * Returns the length of the option pointed to by *cpp. If the
2725 * return value is -1, there was a syntax error in the
2726 * option, either arg contained unknown characters or too many hosts,
2727 * or hostname cannot be resolved.
2728 *
2729 * The caller needs to pass return value (len), *cpp, *protop and *optp
2730 * to setsockopt(2).
2731 *
2732 * *cpp: Points to the result buffer. The region is statically
2733 * allocated by the function.
2734 *
2735 * *protop:
2736 * protocol # to be passed to setsockopt(2).
2737 *
2738 * *optp: option # to be passed to setsockopt(2).
2739 *
2740 */
2741 int
2742 sourceroute(struct addrinfo *ai, char *arg, char **cpp, int *protop, int *optp)
2743 {
2744 char *cp, *cp2, *lsrp, *lsrep;
2745 struct addrinfo hints, *res;
2746 int len, error;
2747 struct sockaddr_in *sin;
2748 char c;
2749 static char lsr[44];
2750 #ifdef INET6
2751 struct cmsghdr *cmsg;
2752 struct sockaddr_in6 *sin6;
2753 static char rhbuf[1024];
2754 #endif
2755
2756 /*
2757 * Verify the arguments.
2758 */
2759 if (cpp == NULL)
2760 return -1;
2761
2762 cp = arg;
2763
2764 *cpp = NULL;
2765
2766 /* init these just in case.... */
2767 lsrp = NULL;
2768 lsrep = NULL;
2769 #ifdef INET6
2770 cmsg = NULL;
2771 #endif
2772
2773 switch (ai->ai_family) {
2774 case AF_INET:
2775 lsrp = lsr;
2776 lsrep = lsrp + sizeof(lsr);
2777
2778 /*
2779 * Next, decide whether we have a loose source
2780 * route or a strict source route, and fill in
2781 * the begining of the option.
2782 */
2783 if (*cp == '!') {
2784 cp++;
2785 *lsrp++ = IPOPT_SSRR;
2786 } else
2787 *lsrp++ = IPOPT_LSRR;
2788 if (*cp != '@')
2789 return -1;
2790 lsrp++; /* skip over length, we'll fill it in later */
2791 *lsrp++ = 4;
2792 cp++;
2793 *protop = IPPROTO_IP;
2794 *optp = IP_OPTIONS;
2795 break;
2796 #ifdef INET6
2797 case AF_INET6:
2798 #ifdef IPV6_PKTOPTIONS
2799 /* RFC2292 */
2800 cmsg = inet6_rthdr_init(rhbuf, IPV6_RTHDR_TYPE_0);
2801 if (*cp != '@')
2802 return -1;
2803 cp++;
2804 *protop = IPPROTO_IPV6;
2805 *optp = IPV6_PKTOPTIONS;
2806 break;
2807 #else
2808 /* no RFC2292 */
2809 return -1;
2810 #endif
2811 #endif
2812 default:
2813 return -1;
2814 }
2815
2816 memset(&hints, 0, sizeof(hints));
2817 hints.ai_family = ai->ai_family;
2818 hints.ai_socktype = SOCK_STREAM;
2819
2820 for (c = 0;;) {
2821 if (c == ':')
2822 cp2 = 0;
2823 else for (cp2 = cp; (c = *cp2) != '\0'; cp2++) {
2824 if (c == ',') {
2825 *cp2++ = '\0';
2826 if (*cp2 == '@')
2827 cp2++;
2828 } else if (c == '@') {
2829 *cp2++ = '\0';
2830 }
2831 #if 0 /*colon conflicts with IPv6 address*/
2832 else if (c == ':') {
2833 *cp2++ = '\0';
2834 }
2835 #endif
2836 else
2837 continue;
2838 break;
2839 }
2840 if (!c)
2841 cp2 = 0;
2842
2843 error = getaddrinfo(cp, NULL, &hints, &res);
2844 if (error) {
2845 fprintf(stderr, "%s: %s\n", cp, gai_strerror(error));
2846 return -1;
2847 }
2848 if (ai->ai_family != res->ai_family) {
2849 freeaddrinfo(res);
2850 return -1;
2851 }
2852 if (ai->ai_family == AF_INET) {
2853 /*
2854 * Check to make sure there is space for address
2855 */
2856 if (lsrp + 4 > lsrep) {
2857 freeaddrinfo(res);
2858 return -1;
2859 }
2860 sin = (struct sockaddr_in *)res->ai_addr;
2861 memcpy(lsrp, &sin->sin_addr, sizeof(struct in_addr));
2862 lsrp += sizeof(struct in_addr);
2863 }
2864 #ifdef INET6
2865 else if (ai->ai_family == AF_INET6) {
2866 sin6 = (struct sockaddr_in6 *)res->ai_addr;
2867 inet6_rthdr_add(cmsg, &sin6->sin6_addr,
2868 IPV6_RTHDR_LOOSE);
2869 }
2870 #endif
2871 else {
2872 freeaddrinfo(res);
2873 return -1;
2874 }
2875 freeaddrinfo(res);
2876 if (cp2)
2877 cp = cp2;
2878 else
2879 break;
2880 }
2881 switch (ai->ai_family) {
2882 case AF_INET:
2883 /* record the last hop */
2884 if (lsrp + 4 > lsrep)
2885 return -1;
2886 sin = (struct sockaddr_in *)ai->ai_addr;
2887 memcpy(lsrp, &sin->sin_addr, sizeof(struct in_addr));
2888 lsrp += sizeof(struct in_addr);
2889 lsr[IPOPT_OLEN] = lsrp - lsr;
2890 if (lsr[IPOPT_OLEN] <= 7 || lsr[IPOPT_OLEN] > 40)
2891 return -1;
2892 *lsrp++ = IPOPT_NOP; /*32bit word align*/
2893 len = lsrp - lsr;
2894 *cpp = lsr;
2895 break;
2896 #ifdef INET6
2897 case AF_INET6:
2898 inet6_rthdr_lasthop(cmsg, IPV6_RTHDR_LOOSE);
2899 len = cmsg->cmsg_len;
2900 *cpp = rhbuf;
2901 break;
2902 #endif
2903 default:
2904 return -1;
2905 }
2906 return len;
2907 }
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