Annotation of src/usr.bin/telnet/commands.c, Revision 1.71
1.71 ! deraadt 1: /* $OpenBSD: commands.c,v 1.70 2014/09/09 03:41:08 guenther Exp $ */
1.4 deraadt 2: /* $NetBSD: commands.c,v 1.14 1996/03/24 22:03:48 jtk Exp $ */
1.3 niklas 3:
1.1 deraadt 4: /*
5: * Copyright (c) 1988, 1990, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
1.45 millert 16: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: */
32:
1.10 art 33: #include "telnet_locl.h"
1.59 guenther 34:
1.62 guenther 35: #include <sys/socket.h>
1.59 guenther 36: #include <netinet/in.h>
37: #include <netinet/ip.h>
38: #include <arpa/inet.h>
1.62 guenther 39: #include <arpa/telnet.h>
1.59 guenther 40:
1.60 guenther 41: #include <ctype.h>
1.15 art 42: #include <err.h>
1.62 guenther 43: #include <errno.h>
1.61 guenther 44: #include <netdb.h>
1.59 guenther 45: #include <pwd.h>
46: #include <stdarg.h>
1.62 guenther 47: #include <stdlib.h>
48: #include <string.h>
1.60 guenther 49: #include <unistd.h>
1.71 ! deraadt 50: #include <limits.h>
1.1 deraadt 51:
1.68 guenther 52: #ifdef SKEY
53: #include <sys/wait.h>
54: #define PATH_SKEY "/usr/bin/skey"
55: #endif
56:
57: static unsigned long sourceroute(char *arg, char **cpp, int *lenp);
58:
1.1 deraadt 59: int tos = -1;
60:
61: char *hostname;
62:
63: typedef struct {
64: char *name; /* command name */
65: char *help; /* help string (NULL for no help) */
1.63 guenther 66: int (*handler)(int, char **);/* routine which executes command */
1.1 deraadt 67: int needconnect; /* Do we need to be connected to execute? */
68: } Command;
69:
70: static char line[256];
71: static char saveline[256];
72: static int margc;
73: static char *margv[20];
74:
1.68 guenther 75: #ifdef SKEY
1.69 jsg 76: int
77: skey_calc(int argc, char **argv)
1.6 deraadt 78: {
79: int status;
80:
81: if(argc != 3) {
1.21 deraadt 82: printf("usage: %s sequence challenge\n", argv[0]);
1.15 art 83: return 0;
1.6 deraadt 84: }
85:
86: switch(fork()) {
87: case 0:
88: execv(PATH_SKEY, argv);
89: exit (1);
90: case -1:
1.15 art 91: err(1, "fork");
1.6 deraadt 92: break;
93: default:
94: (void) wait(&status);
95: if (WIFEXITED(status))
96: return (WEXITSTATUS(status));
97: return (0);
98: }
99: }
100: #endif
101:
1.69 jsg 102: static void
103: makeargv(void)
1.1 deraadt 104: {
1.39 mpech 105: char *cp, *cp2, c;
106: char **argp = margv;
1.1 deraadt 107:
108: margc = 0;
109: cp = line;
110: if (*cp == '!') { /* Special case shell escape */
1.43 hin 111: strlcpy(saveline, line, sizeof(saveline)); /* save for shell command */
1.1 deraadt 112: *argp++ = "!"; /* No room in string to get this */
113: margc++;
114: cp++;
115: }
1.10 art 116: while ((c = *cp)) {
1.39 mpech 117: int inquote = 0;
1.60 guenther 118: while (isspace((unsigned char)c))
1.1 deraadt 119: c = *++cp;
120: if (c == '\0')
121: break;
122: *argp++ = cp;
123: margc += 1;
124: for (cp2 = cp; c != '\0'; c = *++cp) {
125: if (inquote) {
126: if (c == inquote) {
127: inquote = 0;
128: continue;
129: }
130: } else {
131: if (c == '\\') {
132: if ((c = *++cp) == '\0')
133: break;
134: } else if (c == '"') {
135: inquote = '"';
136: continue;
137: } else if (c == '\'') {
138: inquote = '\'';
139: continue;
1.60 guenther 140: } else if (isspace((unsigned char)c))
1.1 deraadt 141: break;
142: }
143: *cp2++ = c;
144: }
145: *cp2 = '\0';
146: if (c == '\0')
147: break;
148: cp++;
149: }
150: *argp++ = 0;
151: }
152:
153: /*
154: * Make a character string into a number.
155: *
156: * Todo: 1. Could take random integers (12, 0x12, 012, 0b1).
157: */
158:
1.69 jsg 159: static char
160: special(char *s)
1.1 deraadt 161: {
1.39 mpech 162: char c;
1.1 deraadt 163: char b;
164:
165: switch (*s) {
166: case '^':
167: b = *++s;
168: if (b == '?') {
169: c = b | 0x40; /* DEL */
170: } else {
171: c = b & 0x1f;
172: }
173: break;
174: default:
175: c = *s;
176: break;
177: }
178: return c;
179: }
180:
181: /*
182: * Construct a control character sequence
183: * for a special character.
184: */
1.69 jsg 185: static char *
186: control(cc_t c)
1.1 deraadt 187: {
188: static char buf[5];
189: /*
190: * The only way I could get the Sun 3.5 compiler
191: * to shut up about
192: * if ((unsigned int)c >= 0x80)
193: * was to assign "c" to an unsigned int variable...
194: * Arggg....
195: */
1.39 mpech 196: unsigned int uic = (unsigned int)c;
1.1 deraadt 197:
198: if (uic == 0x7f)
199: return ("^?");
200: if (c == (cc_t)_POSIX_VDISABLE) {
201: return "off";
202: }
203: if (uic >= 0x80) {
204: buf[0] = '\\';
205: buf[1] = ((c>>6)&07) + '0';
206: buf[2] = ((c>>3)&07) + '0';
207: buf[3] = (c&07) + '0';
208: buf[4] = 0;
209: } else if (uic >= 0x20) {
210: buf[0] = c;
211: buf[1] = 0;
212: } else {
213: buf[0] = '^';
214: buf[1] = '@'+c;
215: buf[2] = 0;
216: }
217: return (buf);
218: }
219:
220: /*
221: * The following are data structures and routines for
222: * the "send" command.
223: *
224: */
1.3 niklas 225:
1.1 deraadt 226: struct sendlist {
227: char *name; /* How user refers to it (case independent) */
228: char *help; /* Help information (0 ==> no help) */
229: int needconnect; /* Need to be connected */
230: int narg; /* Number of arguments */
231: int (*handler)(); /* Routine to perform (for special ops) */
232: int nbyte; /* Number of bytes to send this command */
233: int what; /* Character to be sent (<0 ==> special) */
234: };
235:
236:
237: static int
1.41 millert 238: send_esc(void),
239: send_help(void),
240: send_docmd(char *),
241: send_dontcmd(char *),
242: send_willcmd(char *),
243: send_wontcmd(char *);
1.1 deraadt 244:
245: static struct sendlist Sendlist[] = {
246: { "ao", "Send Telnet Abort output", 1, 0, 0, 2, AO },
247: { "ayt", "Send Telnet 'Are You There'", 1, 0, 0, 2, AYT },
248: { "brk", "Send Telnet Break", 1, 0, 0, 2, BREAK },
249: { "break", 0, 1, 0, 0, 2, BREAK },
250: { "ec", "Send Telnet Erase Character", 1, 0, 0, 2, EC },
251: { "el", "Send Telnet Erase Line", 1, 0, 0, 2, EL },
252: { "escape", "Send current escape character", 1, 0, send_esc, 1, 0 },
253: { "ga", "Send Telnet 'Go Ahead' sequence", 1, 0, 0, 2, GA },
254: { "ip", "Send Telnet Interrupt Process", 1, 0, 0, 2, IP },
255: { "intp", 0, 1, 0, 0, 2, IP },
256: { "interrupt", 0, 1, 0, 0, 2, IP },
257: { "intr", 0, 1, 0, 0, 2, IP },
258: { "nop", "Send Telnet 'No operation'", 1, 0, 0, 2, NOP },
259: { "eor", "Send Telnet 'End of Record'", 1, 0, 0, 2, EOR },
260: { "abort", "Send Telnet 'Abort Process'", 1, 0, 0, 2, ABORT },
261: { "susp", "Send Telnet 'Suspend Process'", 1, 0, 0, 2, SUSP },
262: { "eof", "Send Telnet End of File Character", 1, 0, 0, 2, xEOF },
263: { "synch", "Perform Telnet 'Synch operation'", 1, 0, dosynch, 2, 0 },
264: { "getstatus", "Send request for STATUS", 1, 0, get_status, 6, 0 },
265: { "?", "Display send options", 0, 0, send_help, 0, 0 },
266: { "help", 0, 0, 0, send_help, 0, 0 },
267: { "do", 0, 0, 1, send_docmd, 3, 0 },
268: { "dont", 0, 0, 1, send_dontcmd, 3, 0 },
269: { "will", 0, 0, 1, send_willcmd, 3, 0 },
270: { "wont", 0, 0, 1, send_wontcmd, 3, 0 },
271: { 0 }
272: };
273:
274: #define GETSEND(name) ((struct sendlist *) genget(name, (char **) Sendlist, \
275: sizeof(struct sendlist)))
276:
1.69 jsg 277: static int
278: sendcmd(int argc, char **argv)
1.1 deraadt 279: {
280: int count; /* how many bytes we are going to need to send */
281: int i;
282: struct sendlist *s; /* pointer to current command */
283: int success = 0;
284: int needconnect = 0;
285:
286: if (argc < 2) {
1.10 art 287: printf("need at least one argument for 'send' command\r\n");
288: printf("'send ?' for help\r\n");
1.1 deraadt 289: return 0;
290: }
291: /*
292: * First, validate all the send arguments.
293: * In addition, we see how much space we are going to need, and
294: * whether or not we will be doing a "SYNCH" operation (which
295: * flushes the network queue).
296: */
297: count = 0;
298: for (i = 1; i < argc; i++) {
299: s = GETSEND(argv[i]);
300: if (s == 0) {
1.10 art 301: printf("Unknown send argument '%s'\r\n'send ?' for help.\r\n",
1.1 deraadt 302: argv[i]);
303: return 0;
304: } else if (Ambiguous(s)) {
1.10 art 305: printf("Ambiguous send argument '%s'\r\n'send ?' for help.\r\n",
1.1 deraadt 306: argv[i]);
307: return 0;
308: }
309: if (i + s->narg >= argc) {
310: fprintf(stderr,
1.10 art 311: "Need %d argument%s to 'send %s' command. 'send %s ?' for help.\r\n",
1.1 deraadt 312: s->narg, s->narg == 1 ? "" : "s", s->name, s->name);
313: return 0;
314: }
315: count += s->nbyte;
316: if (s->handler == send_help) {
317: send_help();
318: return 0;
319: }
320:
321: i += s->narg;
322: needconnect += s->needconnect;
323: }
324: if (!connected && needconnect) {
1.10 art 325: printf("?Need to be connected first.\r\n");
326: printf("'send ?' for help\r\n");
1.1 deraadt 327: return 0;
328: }
329: /* Now, do we have enough room? */
330: if (NETROOM() < count) {
1.10 art 331: printf("There is not enough room in the buffer TO the network\r\n");
332: printf("to process your request. Nothing will be done.\r\n");
333: printf("('send synch' will throw away most data in the network\r\n");
334: printf("buffer, if this might help.)\r\n");
1.1 deraadt 335: return 0;
336: }
337: /* OK, they are all OK, now go through again and actually send */
338: count = 0;
339: for (i = 1; i < argc; i++) {
340: if ((s = GETSEND(argv[i])) == 0) {
1.10 art 341: fprintf(stderr, "Telnet 'send' error - argument disappeared!\r\n");
1.63 guenther 342: quit();
1.1 deraadt 343: }
344: if (s->handler) {
345: count++;
346: success += (*s->handler)((s->narg > 0) ? argv[i+1] : 0,
347: (s->narg > 1) ? argv[i+2] : 0);
348: i += s->narg;
349: } else {
350: NET2ADD(IAC, s->what);
351: printoption("SENT", IAC, s->what);
352: }
353: }
354: return (count == success);
355: }
356:
1.69 jsg 357: static int send_tncmd(void (*func)(int, int), char *cmd, char *name);
1.10 art 358:
1.69 jsg 359: static int
360: send_esc(void)
1.1 deraadt 361: {
362: NETADD(escape);
363: return 1;
364: }
365:
1.69 jsg 366: static int
367: send_docmd(char *name)
1.1 deraadt 368: {
369: return(send_tncmd(send_do, "do", name));
370: }
371:
1.69 jsg 372: static int
373: send_dontcmd(char *name)
1.1 deraadt 374: {
375: return(send_tncmd(send_dont, "dont", name));
376: }
1.69 jsg 377:
378: static int
379: send_willcmd(char *name)
1.1 deraadt 380: {
381: return(send_tncmd(send_will, "will", name));
382: }
1.69 jsg 383:
384: static int
385: send_wontcmd(char *name)
1.1 deraadt 386: {
387: return(send_tncmd(send_wont, "wont", name));
388: }
389:
1.69 jsg 390: int
391: send_tncmd(void (*func)(int, int), char *cmd, char *name)
1.1 deraadt 392: {
393: char **cpp;
394: extern char *telopts[];
1.39 mpech 395: int val = 0;
1.1 deraadt 396:
1.10 art 397: if (isprefix(name, "help") || isprefix(name, "?")) {
1.39 mpech 398: int col, len;
1.1 deraadt 399:
1.10 art 400: printf("Usage: send %s <value|option>\r\n", cmd);
401: printf("\"value\" must be from 0 to 255\r\n");
402: printf("Valid options are:\r\n\t");
1.1 deraadt 403:
404: col = 8;
405: for (cpp = telopts; *cpp; cpp++) {
406: len = strlen(*cpp) + 3;
407: if (col + len > 65) {
1.10 art 408: printf("\r\n\t");
1.1 deraadt 409: col = 8;
410: }
411: printf(" \"%s\"", *cpp);
412: col += len;
413: }
1.10 art 414: printf("\r\n");
1.1 deraadt 415: return 0;
416: }
417: cpp = (char **)genget(name, telopts, sizeof(char *));
418: if (Ambiguous(cpp)) {
1.10 art 419: fprintf(stderr,"'%s': ambiguous argument ('send %s ?' for help).\r\n",
1.1 deraadt 420: name, cmd);
421: return 0;
422: }
423: if (cpp) {
424: val = cpp - telopts;
425: } else {
1.39 mpech 426: char *cp = name;
1.1 deraadt 427:
428: while (*cp >= '0' && *cp <= '9') {
429: val *= 10;
430: val += *cp - '0';
431: cp++;
432: }
433: if (*cp != 0) {
1.10 art 434: fprintf(stderr, "'%s': unknown argument ('send %s ?' for help).\r\n",
1.1 deraadt 435: name, cmd);
436: return 0;
437: } else if (val < 0 || val > 255) {
1.10 art 438: fprintf(stderr, "'%s': bad value ('send %s ?' for help).\r\n",
1.1 deraadt 439: name, cmd);
440: return 0;
441: }
442: }
443: if (!connected) {
1.10 art 444: printf("?Need to be connected first.\r\n");
1.1 deraadt 445: return 0;
446: }
447: (*func)(val, 1);
448: return 1;
449: }
450:
1.69 jsg 451: static int
452: send_help(void)
1.1 deraadt 453: {
454: struct sendlist *s; /* pointer to current command */
455: for (s = Sendlist; s->name; s++) {
456: if (s->help)
1.10 art 457: printf("%-15s %s\r\n", s->name, s->help);
1.1 deraadt 458: }
459: return(0);
460: }
461:
462: /*
463: * The following are the routines and data structures referred
464: * to by the arguments to the "toggle" command.
465: */
466:
1.69 jsg 467: static int
468: lclchars(int unused)
1.1 deraadt 469: {
470: donelclchars = 1;
471: return 1;
472: }
473:
1.69 jsg 474: static int
475: togdebug(int unused)
1.1 deraadt 476: {
477: if (net > 0 &&
1.56 guenther 478: (setsockopt(net, SOL_SOCKET, SO_DEBUG, &debug, sizeof(debug))) == -1) {
1.1 deraadt 479: perror("setsockopt (SO_DEBUG)");
480: }
481: return 1;
482: }
483:
1.69 jsg 484: static int
485: togcrlf(int unused)
1.1 deraadt 486: {
487: if (crlf) {
1.10 art 488: printf("Will send carriage returns as telnet <CR><LF>.\r\n");
1.1 deraadt 489: } else {
1.10 art 490: printf("Will send carriage returns as telnet <CR><NUL>.\r\n");
1.1 deraadt 491: }
492: return 1;
493: }
494:
495: int binmode;
496:
1.69 jsg 497: static int
498: togbinary(int val)
1.1 deraadt 499: {
500: donebinarytoggle = 1;
501:
502: if (val >= 0) {
503: binmode = val;
504: } else {
505: if (my_want_state_is_will(TELOPT_BINARY) &&
506: my_want_state_is_do(TELOPT_BINARY)) {
507: binmode = 1;
508: } else if (my_want_state_is_wont(TELOPT_BINARY) &&
509: my_want_state_is_dont(TELOPT_BINARY)) {
510: binmode = 0;
511: }
512: val = binmode ? 0 : 1;
513: }
514:
515: if (val == 1) {
516: if (my_want_state_is_will(TELOPT_BINARY) &&
517: my_want_state_is_do(TELOPT_BINARY)) {
1.10 art 518: printf("Already operating in binary mode with remote host.\r\n");
1.1 deraadt 519: } else {
1.10 art 520: printf("Negotiating binary mode with remote host.\r\n");
1.1 deraadt 521: tel_enter_binary(3);
522: }
523: } else {
524: if (my_want_state_is_wont(TELOPT_BINARY) &&
525: my_want_state_is_dont(TELOPT_BINARY)) {
1.10 art 526: printf("Already in network ascii mode with remote host.\r\n");
1.1 deraadt 527: } else {
1.10 art 528: printf("Negotiating network ascii mode with remote host.\r\n");
1.1 deraadt 529: tel_leave_binary(3);
530: }
531: }
532: return 1;
533: }
534:
1.69 jsg 535: static int
536: togrbinary(int val)
1.1 deraadt 537: {
538: donebinarytoggle = 1;
539:
540: if (val == -1)
541: val = my_want_state_is_do(TELOPT_BINARY) ? 0 : 1;
542:
543: if (val == 1) {
544: if (my_want_state_is_do(TELOPT_BINARY)) {
1.10 art 545: printf("Already receiving in binary mode.\r\n");
1.1 deraadt 546: } else {
1.10 art 547: printf("Negotiating binary mode on input.\r\n");
1.1 deraadt 548: tel_enter_binary(1);
549: }
550: } else {
551: if (my_want_state_is_dont(TELOPT_BINARY)) {
1.10 art 552: printf("Already receiving in network ascii mode.\r\n");
1.1 deraadt 553: } else {
1.10 art 554: printf("Negotiating network ascii mode on input.\r\n");
1.1 deraadt 555: tel_leave_binary(1);
556: }
557: }
558: return 1;
559: }
560:
1.69 jsg 561: static int
562: togxbinary(int val)
1.1 deraadt 563: {
564: donebinarytoggle = 1;
565:
566: if (val == -1)
567: val = my_want_state_is_will(TELOPT_BINARY) ? 0 : 1;
568:
569: if (val == 1) {
570: if (my_want_state_is_will(TELOPT_BINARY)) {
1.10 art 571: printf("Already transmitting in binary mode.\r\n");
1.1 deraadt 572: } else {
1.10 art 573: printf("Negotiating binary mode on output.\r\n");
1.1 deraadt 574: tel_enter_binary(2);
575: }
576: } else {
577: if (my_want_state_is_wont(TELOPT_BINARY)) {
1.10 art 578: printf("Already transmitting in network ascii mode.\r\n");
1.1 deraadt 579: } else {
1.10 art 580: printf("Negotiating network ascii mode on output.\r\n");
1.1 deraadt 581: tel_leave_binary(2);
582: }
583: }
584: return 1;
585: }
586:
587:
1.63 guenther 588: static int togglehelp(int);
1.1 deraadt 589:
590: struct togglelist {
1.63 guenther 591: char *name; /* name of toggle */
592: char *help; /* help message */
593: int (*handler)(int); /* routine to do actual setting */
1.1 deraadt 594: int *variable;
595: char *actionexplanation;
1.8 robin 596: int needconnect; /* Need to be connected */
1.1 deraadt 597: };
598:
599: static struct togglelist Togglelist[] = {
600: { "autoflush",
601: "flushing of output when sending interrupt characters",
602: 0,
603: &autoflush,
1.10 art 604: "flush output when sending interrupt characters" },
1.1 deraadt 605: { "autosynch",
606: "automatic sending of interrupt characters in urgent mode",
607: 0,
608: &autosynch,
1.10 art 609: "send interrupt characters in urgent mode" },
1.1 deraadt 610: { "autologin",
1.57 guenther 611: "automatic sending of login name",
1.1 deraadt 612: 0,
613: &autologin,
1.57 guenther 614: "send login name" },
1.1 deraadt 615: { "skiprc",
616: "don't read ~/.telnetrc file",
617: 0,
618: &skiprc,
1.10 art 619: "skip reading of ~/.telnetrc file" },
1.1 deraadt 620: { "binary",
621: "sending and receiving of binary data",
622: togbinary,
623: 0,
1.10 art 624: 0 },
1.1 deraadt 625: { "inbinary",
626: "receiving of binary data",
627: togrbinary,
628: 0,
1.10 art 629: 0 },
1.1 deraadt 630: { "outbinary",
631: "sending of binary data",
632: togxbinary,
633: 0,
1.10 art 634: 0 },
1.1 deraadt 635: { "crlf",
636: "sending carriage returns as telnet <CR><LF>",
637: togcrlf,
638: &crlf,
1.10 art 639: 0 },
1.1 deraadt 640: { "crmod",
641: "mapping of received carriage returns",
642: 0,
643: &crmod,
1.10 art 644: "map carriage return on output" },
1.1 deraadt 645: { "localchars",
646: "local recognition of certain control characters",
647: lclchars,
648: &localchars,
1.10 art 649: "recognize certain control characters" },
1.8 robin 650: { " ", "", 0, 0 }, /* empty line */
1.1 deraadt 651: { "debug",
652: "debugging",
653: togdebug,
654: &debug,
1.10 art 655: "turn on socket level debugging" },
1.1 deraadt 656: { "netdata",
657: "printing of hexadecimal network data (debugging)",
658: 0,
659: &netdata,
1.10 art 660: "print hexadecimal representation of network traffic" },
1.1 deraadt 661: { "prettydump",
662: "output of \"netdata\" to user readable format (debugging)",
663: 0,
664: &prettydump,
1.10 art 665: "print user readable output for \"netdata\"" },
1.1 deraadt 666: { "options",
667: "viewing of options processing (debugging)",
668: 0,
669: &showoptions,
1.10 art 670: "show option processing" },
1.1 deraadt 671: { "termdata",
672: "(debugging) toggle printing of hexadecimal terminal data",
673: 0,
674: &termdata,
1.10 art 675: "print hexadecimal representation of terminal traffic" },
1.1 deraadt 676: { "?",
677: 0,
1.10 art 678: togglehelp },
1.1 deraadt 679: { "help",
680: 0,
1.10 art 681: togglehelp },
1.1 deraadt 682: { 0 }
683: };
684:
1.69 jsg 685: static int
1.63 guenther 686: togglehelp(int unused)
1.1 deraadt 687: {
688: struct togglelist *c;
689:
690: for (c = Togglelist; c->name; c++) {
691: if (c->help) {
692: if (*c->help)
1.10 art 693: printf("%-15s toggle %s\r\n", c->name, c->help);
1.1 deraadt 694: else
1.10 art 695: printf("\r\n");
1.1 deraadt 696: }
697: }
1.10 art 698: printf("\r\n");
699: printf("%-15s %s\r\n", "?", "display help information");
1.1 deraadt 700: return 0;
701: }
702:
1.69 jsg 703: static void
704: settogglehelp(int set)
1.1 deraadt 705: {
706: struct togglelist *c;
707:
708: for (c = Togglelist; c->name; c++) {
709: if (c->help) {
710: if (*c->help)
1.10 art 711: printf("%-15s %s %s\r\n", c->name, set ? "enable" : "disable",
1.1 deraadt 712: c->help);
713: else
1.10 art 714: printf("\r\n");
1.1 deraadt 715: }
716: }
717: }
718:
719: #define GETTOGGLE(name) (struct togglelist *) \
720: genget(name, (char **) Togglelist, sizeof(struct togglelist))
721:
1.69 jsg 722: static int
723: toggle(int argc, char *argv[])
1.1 deraadt 724: {
725: int retval = 1;
726: char *name;
727: struct togglelist *c;
728:
729: if (argc < 2) {
730: fprintf(stderr,
1.10 art 731: "Need an argument to 'toggle' command. 'toggle ?' for help.\r\n");
1.1 deraadt 732: return 0;
733: }
734: argc--;
735: argv++;
736: while (argc--) {
737: name = *argv++;
738: c = GETTOGGLE(name);
739: if (Ambiguous(c)) {
1.10 art 740: fprintf(stderr, "'%s': ambiguous argument ('toggle ?' for help).\r\n",
1.1 deraadt 741: name);
742: return 0;
743: } else if (c == 0) {
1.10 art 744: fprintf(stderr, "'%s': unknown argument ('toggle ?' for help).\r\n",
1.1 deraadt 745: name);
746: return 0;
1.8 robin 747: } else if (!connected && c->needconnect) {
1.10 art 748: printf("?Need to be connected first.\r\n");
749: printf("'send ?' for help\r\n");
1.8 robin 750: return 0;
1.1 deraadt 751: } else {
752: if (c->variable) {
753: *c->variable = !*c->variable; /* invert it */
754: if (c->actionexplanation) {
1.10 art 755: printf("%s %s.\r\n", *c->variable? "Will" : "Won't",
1.1 deraadt 756: c->actionexplanation);
757: }
758: }
759: if (c->handler) {
760: retval &= (*c->handler)(-1);
761: }
762: }
763: }
764: return retval;
765: }
766:
767: /*
768: * The following perform the "set" command.
769: */
770:
1.10 art 771: struct termios new_tc = { 0 };
1.1 deraadt 772:
773: struct setlist {
774: char *name; /* name */
775: char *help; /* help information */
1.70 guenther 776: void (*handler)(const char *);
1.1 deraadt 777: cc_t *charp; /* where it is located at */
778: };
779:
780: static struct setlist Setlist[] = {
781: #ifdef KLUDGELINEMODE
782: { "echo", "character to toggle local echoing on/off", 0, &echoc },
783: #endif
784: { "escape", "character to escape back to telnet command mode", 0, &escape },
785: { "rlogin", "rlogin escape character", 0, &rlogin },
786: { "tracefile", "file to write trace information to", SetNetTrace, (cc_t *)NetTraceFile},
787: { " ", "" },
788: { " ", "The following need 'localchars' to be toggled true", 0, 0 },
1.10 art 789: { "flushoutput", "character to cause an Abort Output", 0, &termFlushChar },
790: { "interrupt", "character to cause an Interrupt Process", 0, &termIntChar },
791: { "quit", "character to cause an Abort process", 0, &termQuitChar },
792: { "eof", "character to cause an EOF ", 0, &termEofChar },
1.1 deraadt 793: { " ", "" },
794: { " ", "The following are for local editing in linemode", 0, 0 },
1.10 art 795: { "erase", "character to use to erase a character", 0, &termEraseChar },
796: { "kill", "character to use to erase a line", 0, &termKillChar },
797: { "lnext", "character to use for literal next", 0, &termLiteralNextChar },
798: { "susp", "character to cause a Suspend Process", 0, &termSuspChar },
799: { "reprint", "character to use for line reprint", 0, &termRprntChar },
800: { "worderase", "character to use to erase a word", 0, &termWerasChar },
801: { "start", "character to use for XON", 0, &termStartChar },
802: { "stop", "character to use for XOFF", 0, &termStopChar },
803: { "forw1", "alternate end of line character", 0, &termForw1Char },
804: { "forw2", "alternate end of line character", 0, &termForw2Char },
805: { "ayt", "alternate AYT character", 0, &termAytChar },
1.1 deraadt 806: { 0 }
807: };
808:
1.69 jsg 809: static struct setlist *
810: getset(char *name)
1.1 deraadt 811: {
812: return (struct setlist *)
813: genget(name, (char **) Setlist, sizeof(struct setlist));
814: }
815:
1.69 jsg 816: void
817: set_escape_char(char *s)
1.1 deraadt 818: {
819: if (rlogin != _POSIX_VDISABLE) {
820: rlogin = (s && *s) ? special(s) : _POSIX_VDISABLE;
1.10 art 821: printf("Telnet rlogin escape character is '%s'.\r\n",
1.1 deraadt 822: control(rlogin));
823: } else {
824: escape = (s && *s) ? special(s) : _POSIX_VDISABLE;
1.10 art 825: printf("Telnet escape character is '%s'.\r\n", control(escape));
1.1 deraadt 826: }
827: }
828:
1.69 jsg 829: static int
830: setcmd(int argc, char *argv[])
1.1 deraadt 831: {
832: int value;
833: struct setlist *ct;
834: struct togglelist *c;
835:
836: if (argc < 2 || argc > 3) {
1.10 art 837: printf("Format is 'set Name Value'\r\n'set ?' for help.\r\n");
1.1 deraadt 838: return 0;
839: }
840: if ((argc == 2) && (isprefix(argv[1], "?") || isprefix(argv[1], "help"))) {
841: for (ct = Setlist; ct->name; ct++)
1.10 art 842: printf("%-15s %s\r\n", ct->name, ct->help);
843: printf("\r\n");
1.1 deraadt 844: settogglehelp(1);
1.10 art 845: printf("%-15s %s\r\n", "?", "display help information");
1.1 deraadt 846: return 0;
847: }
848:
849: ct = getset(argv[1]);
850: if (ct == 0) {
851: c = GETTOGGLE(argv[1]);
852: if (c == 0) {
1.10 art 853: fprintf(stderr, "'%s': unknown argument ('set ?' for help).\r\n",
1.1 deraadt 854: argv[1]);
855: return 0;
856: } else if (Ambiguous(c)) {
1.10 art 857: fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\r\n",
1.1 deraadt 858: argv[1]);
859: return 0;
1.8 robin 860: } else if (!connected && c->needconnect) {
1.10 art 861: printf("?Need to be connected first.\r\n");
862: printf("'send ?' for help\r\n");
1.8 robin 863: return 0;
1.1 deraadt 864: }
1.8 robin 865:
1.1 deraadt 866: if (c->variable) {
867: if ((argc == 2) || (strcmp("on", argv[2]) == 0))
868: *c->variable = 1;
869: else if (strcmp("off", argv[2]) == 0)
870: *c->variable = 0;
871: else {
1.10 art 872: printf("Format is 'set togglename [on|off]'\r\n'set ?' for help.\r\n");
1.1 deraadt 873: return 0;
874: }
875: if (c->actionexplanation) {
1.10 art 876: printf("%s %s.\r\n", *c->variable? "Will" : "Won't",
1.1 deraadt 877: c->actionexplanation);
878: }
879: }
880: if (c->handler)
881: (*c->handler)(1);
882: } else if (argc != 3) {
1.10 art 883: printf("Format is 'set Name Value'\r\n'set ?' for help.\r\n");
1.1 deraadt 884: return 0;
885: } else if (Ambiguous(ct)) {
1.10 art 886: fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\r\n",
1.1 deraadt 887: argv[1]);
888: return 0;
889: } else if (ct->handler) {
890: (*ct->handler)(argv[2]);
1.10 art 891: printf("%s set to \"%s\".\r\n", ct->name, (char *)ct->charp);
1.1 deraadt 892: } else {
893: if (strcmp("off", argv[2])) {
894: value = special(argv[2]);
895: } else {
896: value = _POSIX_VDISABLE;
897: }
898: *(ct->charp) = (cc_t)value;
1.10 art 899: printf("%s character is '%s'.\r\n", ct->name, control(*(ct->charp)));
1.1 deraadt 900: }
901: slc_check();
902: return 1;
903: }
904:
1.69 jsg 905: static int
906: unsetcmd(int argc, char *argv[])
1.1 deraadt 907: {
908: struct setlist *ct;
909: struct togglelist *c;
1.39 mpech 910: char *name;
1.1 deraadt 911:
912: if (argc < 2) {
913: fprintf(stderr,
1.10 art 914: "Need an argument to 'unset' command. 'unset ?' for help.\r\n");
1.1 deraadt 915: return 0;
916: }
917: if (isprefix(argv[1], "?") || isprefix(argv[1], "help")) {
918: for (ct = Setlist; ct->name; ct++)
1.10 art 919: printf("%-15s %s\r\n", ct->name, ct->help);
920: printf("\r\n");
1.1 deraadt 921: settogglehelp(0);
1.10 art 922: printf("%-15s %s\r\n", "?", "display help information");
1.1 deraadt 923: return 0;
924: }
925:
926: argc--;
927: argv++;
928: while (argc--) {
929: name = *argv++;
930: ct = getset(name);
931: if (ct == 0) {
932: c = GETTOGGLE(name);
933: if (c == 0) {
1.10 art 934: fprintf(stderr, "'%s': unknown argument ('unset ?' for help).\r\n",
1.1 deraadt 935: name);
936: return 0;
937: } else if (Ambiguous(c)) {
1.10 art 938: fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\r\n",
1.1 deraadt 939: name);
940: return 0;
941: }
942: if (c->variable) {
943: *c->variable = 0;
944: if (c->actionexplanation) {
1.10 art 945: printf("%s %s.\r\n", *c->variable? "Will" : "Won't",
1.1 deraadt 946: c->actionexplanation);
947: }
948: }
949: if (c->handler)
950: (*c->handler)(0);
951: } else if (Ambiguous(ct)) {
1.10 art 952: fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\r\n",
1.1 deraadt 953: name);
954: return 0;
955: } else if (ct->handler) {
1.63 guenther 956: (*ct->handler)(NULL);
1.10 art 957: printf("%s reset to \"%s\".\r\n", ct->name, (char *)ct->charp);
1.1 deraadt 958: } else {
959: *(ct->charp) = _POSIX_VDISABLE;
1.10 art 960: printf("%s character is '%s'.\r\n", ct->name, control(*(ct->charp)));
1.1 deraadt 961: }
962: }
963: return 1;
964: }
965:
966: /*
967: * The following are the data structures and routines for the
968: * 'mode' command.
969: */
970: #ifdef KLUDGELINEMODE
1.69 jsg 971: static int
972: dokludgemode(int unused)
1.1 deraadt 973: {
974: kludgelinemode = 1;
975: send_wont(TELOPT_LINEMODE, 1);
976: send_dont(TELOPT_SGA, 1);
977: send_dont(TELOPT_ECHO, 1);
1.10 art 978: return 1;
1.1 deraadt 979: }
980: #endif
981:
1.69 jsg 982: static int
983: dolinemode(int unused)
1.1 deraadt 984: {
985: #ifdef KLUDGELINEMODE
986: if (kludgelinemode)
987: send_dont(TELOPT_SGA, 1);
988: #endif
989: send_will(TELOPT_LINEMODE, 1);
990: send_dont(TELOPT_ECHO, 1);
991: return 1;
992: }
993:
1.69 jsg 994: static int
995: docharmode(int unused)
1.1 deraadt 996: {
997: #ifdef KLUDGELINEMODE
998: if (kludgelinemode)
999: send_do(TELOPT_SGA, 1);
1000: else
1001: #endif
1002: send_wont(TELOPT_LINEMODE, 1);
1003: send_do(TELOPT_ECHO, 1);
1004: return 1;
1005: }
1006:
1.69 jsg 1007: static int
1008: dolmmode(int bit, int on)
1.1 deraadt 1009: {
1010: unsigned char c;
1011:
1012: if (my_want_state_is_wont(TELOPT_LINEMODE)) {
1.10 art 1013: printf("?Need to have LINEMODE option enabled first.\r\n");
1014: printf("'mode ?' for help.\r\n");
1.1 deraadt 1015: return 0;
1016: }
1017:
1018: if (on)
1019: c = (linemode | bit);
1020: else
1021: c = (linemode & ~bit);
1022: lm_mode(&c, 1, 1);
1023: return 1;
1024: }
1025:
1.69 jsg 1026: int
1027: tn_setmode(int bit)
1.1 deraadt 1028: {
1029: return dolmmode(bit, 1);
1030: }
1031:
1.69 jsg 1032: int
1033: tn_clearmode(int bit)
1.1 deraadt 1034: {
1035: return dolmmode(bit, 0);
1036: }
1037:
1038: struct modelist {
1039: char *name; /* command name */
1040: char *help; /* help string */
1.63 guenther 1041: int (*handler)(int);/* routine which executes command */
1.1 deraadt 1042: int needconnect; /* Do we need to be connected to execute? */
1043: int arg1;
1044: };
1045:
1.63 guenther 1046: static int modehelp(int);
1.1 deraadt 1047:
1048: static struct modelist ModeList[] = {
1049: { "character", "Disable LINEMODE option", docharmode, 1 },
1050: #ifdef KLUDGELINEMODE
1051: { "", "(or disable obsolete line-by-line mode)", 0 },
1052: #endif
1053: { "line", "Enable LINEMODE option", dolinemode, 1 },
1054: #ifdef KLUDGELINEMODE
1055: { "", "(or enable obsolete line-by-line mode)", 0 },
1056: #endif
1057: { "", "", 0 },
1058: { "", "These require the LINEMODE option to be enabled", 0 },
1.10 art 1059: { "isig", "Enable signal trapping", tn_setmode, 1, MODE_TRAPSIG },
1060: { "+isig", 0, tn_setmode, 1, MODE_TRAPSIG },
1061: { "-isig", "Disable signal trapping", tn_clearmode, 1, MODE_TRAPSIG },
1062: { "edit", "Enable character editing", tn_setmode, 1, MODE_EDIT },
1063: { "+edit", 0, tn_setmode, 1, MODE_EDIT },
1064: { "-edit", "Disable character editing", tn_clearmode, 1, MODE_EDIT },
1065: { "softtabs", "Enable tab expansion", tn_setmode, 1, MODE_SOFT_TAB },
1066: { "+softtabs", 0, tn_setmode, 1, MODE_SOFT_TAB },
1067: { "-softtabs", "Disable character editing", tn_clearmode, 1, MODE_SOFT_TAB },
1068: { "litecho", "Enable literal character echo", tn_setmode, 1, MODE_LIT_ECHO },
1069: { "+litecho", 0, tn_setmode, 1, MODE_LIT_ECHO },
1070: { "-litecho", "Disable literal character echo", tn_clearmode, 1, MODE_LIT_ECHO },
1.1 deraadt 1071: { "help", 0, modehelp, 0 },
1072: #ifdef KLUDGELINEMODE
1073: { "kludgeline", 0, dokludgemode, 1 },
1074: #endif
1075: { "", "", 0 },
1076: { "?", "Print help information", modehelp, 0 },
1077: { 0 },
1078: };
1079:
1.69 jsg 1080: static int
1.63 guenther 1081: modehelp(int unused)
1.1 deraadt 1082: {
1083: struct modelist *mt;
1084:
1.10 art 1085: printf("format is: 'mode Mode', where 'Mode' is one of:\r\n\r\n");
1.1 deraadt 1086: for (mt = ModeList; mt->name; mt++) {
1087: if (mt->help) {
1088: if (*mt->help)
1.10 art 1089: printf("%-15s %s\r\n", mt->name, mt->help);
1.1 deraadt 1090: else
1.10 art 1091: printf("\r\n");
1.1 deraadt 1092: }
1093: }
1094: return 0;
1095: }
1096:
1097: #define GETMODECMD(name) (struct modelist *) \
1098: genget(name, (char **) ModeList, sizeof(struct modelist))
1099:
1.69 jsg 1100: static int
1101: modecmd(int argc, char *argv[])
1.1 deraadt 1102: {
1103: struct modelist *mt;
1104:
1105: if (argc != 2) {
1.10 art 1106: printf("'mode' command requires an argument\r\n");
1107: printf("'mode ?' for help.\r\n");
1.1 deraadt 1108: } else if ((mt = GETMODECMD(argv[1])) == 0) {
1.10 art 1109: fprintf(stderr, "Unknown mode '%s' ('mode ?' for help).\r\n", argv[1]);
1.1 deraadt 1110: } else if (Ambiguous(mt)) {
1.10 art 1111: fprintf(stderr, "Ambiguous mode '%s' ('mode ?' for help).\r\n", argv[1]);
1.1 deraadt 1112: } else if (mt->needconnect && !connected) {
1.10 art 1113: printf("?Need to be connected first.\r\n");
1114: printf("'mode ?' for help.\r\n");
1.1 deraadt 1115: } else if (mt->handler) {
1116: return (*mt->handler)(mt->arg1);
1117: }
1118: return 0;
1119: }
1120:
1121: /*
1122: * The following data structures and routines implement the
1123: * "display" command.
1124: */
1125:
1.69 jsg 1126: static int
1127: display(int argc, char *argv[])
1.1 deraadt 1128: {
1129: struct togglelist *tl;
1130: struct setlist *sl;
1131:
1132: #define dotog(tl) if (tl->variable && tl->actionexplanation) { \
1133: if (*tl->variable) { \
1134: printf("will"); \
1135: } else { \
1136: printf("won't"); \
1137: } \
1.10 art 1138: printf(" %s.\r\n", tl->actionexplanation); \
1.1 deraadt 1139: }
1140:
1141: #define doset(sl) if (sl->name && *sl->name != ' ') { \
1142: if (sl->handler == 0) \
1.10 art 1143: printf("%-15s [%s]\r\n", sl->name, control(*sl->charp)); \
1.1 deraadt 1144: else \
1.10 art 1145: printf("%-15s \"%s\"\r\n", sl->name, (char *)sl->charp); \
1.1 deraadt 1146: }
1147:
1148: if (argc == 1) {
1149: for (tl = Togglelist; tl->name; tl++) {
1150: dotog(tl);
1151: }
1.10 art 1152: printf("\r\n");
1.1 deraadt 1153: for (sl = Setlist; sl->name; sl++) {
1154: doset(sl);
1155: }
1156: } else {
1157: int i;
1158:
1159: for (i = 1; i < argc; i++) {
1160: sl = getset(argv[i]);
1161: tl = GETTOGGLE(argv[i]);
1162: if (Ambiguous(sl) || Ambiguous(tl)) {
1.10 art 1163: printf("?Ambiguous argument '%s'.\r\n", argv[i]);
1.1 deraadt 1164: return 0;
1165: } else if (!sl && !tl) {
1.10 art 1166: printf("?Unknown argument '%s'.\r\n", argv[i]);
1.1 deraadt 1167: return 0;
1168: } else {
1169: if (tl) {
1170: dotog(tl);
1171: }
1172: if (sl) {
1173: doset(sl);
1174: }
1175: }
1176: }
1177: }
1178: /*@*/optionstatus();
1179: return 1;
1180: #undef doset
1181: #undef dotog
1182: }
1.10 art 1183:
1.1 deraadt 1184: /*
1185: * The following are the data structures, and many of the routines,
1186: * relating to command processing.
1187: */
1188:
1189: /*
1190: * Set the escape character.
1191: */
1.69 jsg 1192: static int
1193: setescape(int argc, char *argv[])
1.1 deraadt 1194: {
1.39 mpech 1195: char *arg;
1.1 deraadt 1196: char buf[50];
1197:
1198: printf(
1.10 art 1199: "Deprecated usage - please use 'set escape%s%s' in the future.\r\n",
1.1 deraadt 1200: (argc > 2)? " ":"", (argc > 2)? argv[1]: "");
1201: if (argc > 2)
1202: arg = argv[1];
1203: else {
1204: printf("new escape character: ");
1205: (void) fgets(buf, sizeof(buf), stdin);
1206: arg = buf;
1207: }
1208: if (arg[0] != '\0')
1209: escape = arg[0];
1.56 guenther 1210: printf("Escape character is '%s'.\r\n", control(escape));
1.1 deraadt 1211: (void) fflush(stdout);
1212: return 1;
1213: }
1214:
1.69 jsg 1215: static int
1216: togcrmod(int unused1, char *unused2[])
1.1 deraadt 1217: {
1218: crmod = !crmod;
1.10 art 1219: printf("Deprecated usage - please use 'toggle crmod' in the future.\r\n");
1220: printf("%s map carriage return on output.\r\n", crmod ? "Will" : "Won't");
1.1 deraadt 1221: (void) fflush(stdout);
1222: return 1;
1223: }
1224:
1.69 jsg 1225: int
1226: telnetsuspend(int unused1, char *unused2[])
1.1 deraadt 1227: {
1228: setcommandmode();
1229: {
1230: long oldrows, oldcols, newrows, newcols, err;
1231:
1232: err = (TerminalWindowSize(&oldrows, &oldcols) == 0) ? 1 : 0;
1233: (void) kill(0, SIGTSTP);
1234: /*
1235: * If we didn't get the window size before the SUSPEND, but we
1.3 niklas 1236: * can get them now (?), then send the NAWS to make sure that
1.1 deraadt 1237: * we are set up for the right window size.
1238: */
1239: if (TerminalWindowSize(&newrows, &newcols) && connected &&
1240: (err || ((oldrows != newrows) || (oldcols != newcols)))) {
1241: sendnaws();
1242: }
1243: }
1244: /* reget parameters in case they were changed */
1245: TerminalSaveState();
1246: setconnmode(0);
1247: return 1;
1248: }
1249:
1.69 jsg 1250: int
1251: shell(int argc, char *argv[])
1.1 deraadt 1252: {
1253: long oldrows, oldcols, newrows, newcols, err;
1254:
1255: setcommandmode();
1256:
1257: err = (TerminalWindowSize(&oldrows, &oldcols) == 0) ? 1 : 0;
1258: switch(vfork()) {
1259: case -1:
1.10 art 1260: perror("Fork failed\r\n");
1.1 deraadt 1261: break;
1262:
1263: case 0:
1264: {
1265: /*
1266: * Fire up the shell in the child.
1267: */
1.39 mpech 1268: char *shellp, *shellname;
1.1 deraadt 1269:
1270: shellp = getenv("SHELL");
1271: if (shellp == NULL)
1272: shellp = "/bin/sh";
1.3 niklas 1273: if ((shellname = strrchr(shellp, '/')) == 0)
1.1 deraadt 1274: shellname = shellp;
1275: else
1276: shellname++;
1277: if (argc > 1)
1.36 deraadt 1278: execl(shellp, shellname, "-c", &saveline[1], (char *)NULL);
1.1 deraadt 1279: else
1.36 deraadt 1280: execl(shellp, shellname, (char *)NULL);
1.1 deraadt 1281: perror("Execl");
1282: _exit(1);
1283: }
1284: default:
1285: (void)wait((int *)0); /* Wait for the shell to complete */
1286:
1287: if (TerminalWindowSize(&newrows, &newcols) && connected &&
1288: (err || ((oldrows != newrows) || (oldcols != newcols)))) {
1289: sendnaws();
1290: }
1291: break;
1292: }
1293: return 1;
1294: }
1295:
1.68 guenther 1296: static void
1297: close_connection(void)
1298: {
1299: if (connected) {
1300: (void) shutdown(net, 2);
1301: printf("Connection closed.\r\n");
1302: (void)close(net);
1303: connected = 0;
1304: resettermname = 1;
1305: /* reset options */
1306: tninit();
1307: }
1308: }
1309:
1310: static int
1.69 jsg 1311: bye(int argc, char *argv[])
1.1 deraadt 1312: {
1.68 guenther 1313: close_connection();
1.1 deraadt 1314: longjmp(toplevel, 1);
1315: }
1316:
1.63 guenther 1317: void
1.59 guenther 1318: quit(void)
1.1 deraadt 1319: {
1.68 guenther 1320: close_connection();
1.1 deraadt 1321: Exit(0);
1322: }
1323:
1.63 guenther 1324: static int
1325: quitcmd(int unused1, char *unused2[])
1326: {
1327: quit();
1328: }
1329:
1.69 jsg 1330: static int
1331: logout(int unused1, char *unused2[])
1.1 deraadt 1332: {
1333: send_do(TELOPT_LOGOUT, 1);
1334: (void) netflush();
1335: return 1;
1336: }
1337:
1338:
1339: /*
1340: * The SLC command.
1341: */
1342:
1343: struct slclist {
1344: char *name;
1345: char *help;
1.63 guenther 1346: void (*handler)(int);
1.1 deraadt 1347: int arg;
1348: };
1349:
1.63 guenther 1350: static void slc_help(int);
1.1 deraadt 1351:
1352: struct slclist SlcList[] = {
1353: { "export", "Use local special character definitions",
1354: slc_mode_export, 0 },
1355: { "import", "Use remote special character definitions",
1356: slc_mode_import, 1 },
1357: { "check", "Verify remote special character definitions",
1358: slc_mode_import, 0 },
1359: { "help", 0, slc_help, 0 },
1360: { "?", "Print help information", slc_help, 0 },
1361: { 0 },
1362: };
1363:
1.69 jsg 1364: static void
1.63 guenther 1365: slc_help(int unused)
1.1 deraadt 1366: {
1367: struct slclist *c;
1368:
1369: for (c = SlcList; c->name; c++) {
1370: if (c->help) {
1371: if (*c->help)
1.10 art 1372: printf("%-15s %s\r\n", c->name, c->help);
1.1 deraadt 1373: else
1.10 art 1374: printf("\r\n");
1.1 deraadt 1375: }
1376: }
1377: }
1378:
1.69 jsg 1379: static struct slclist *
1380: getslc(char *name)
1.1 deraadt 1381: {
1382: return (struct slclist *)
1383: genget(name, (char **) SlcList, sizeof(struct slclist));
1384: }
1385:
1.69 jsg 1386: static int
1387: slccmd(int argc, char *argv[])
1.1 deraadt 1388: {
1389: struct slclist *c;
1390:
1391: if (argc != 2) {
1392: fprintf(stderr,
1.10 art 1393: "Need an argument to 'slc' command. 'slc ?' for help.\r\n");
1.1 deraadt 1394: return 0;
1395: }
1396: c = getslc(argv[1]);
1397: if (c == 0) {
1.10 art 1398: fprintf(stderr, "'%s': unknown argument ('slc ?' for help).\r\n",
1.1 deraadt 1399: argv[1]);
1.3 niklas 1400: return 0;
1.1 deraadt 1401: }
1402: if (Ambiguous(c)) {
1.10 art 1403: fprintf(stderr, "'%s': ambiguous argument ('slc ?' for help).\r\n",
1.1 deraadt 1404: argv[1]);
1.3 niklas 1405: return 0;
1.1 deraadt 1406: }
1407: (*c->handler)(c->arg);
1408: slcstate();
1409: return 1;
1410: }
1411:
1412: /*
1413: * The ENVIRON command.
1414: */
1415:
1416: struct envlist {
1417: char *name;
1418: char *help;
1419: void (*handler)();
1420: int narg;
1421: };
1422:
1.41 millert 1423: static void env_help(void);
1.70 guenther 1424: static void env_undefine(const char *);
1425: static void env_export(const char *);
1426: static void env_unexport(const char *);
1427: static void env_send(const char *);
1.67 guenther 1428: static void env_list(void);
1.70 guenther 1429: static struct env_lst *env_find(const char *var);
1.1 deraadt 1430:
1431: struct envlist EnvList[] = {
1432: { "define", "Define an environment variable",
1433: (void (*)())env_define, 2 },
1434: { "undefine", "Undefine an environment variable",
1435: env_undefine, 1 },
1436: { "export", "Mark an environment variable for automatic export",
1437: env_export, 1 },
1438: { "unexport", "Don't mark an environment variable for automatic export",
1439: env_unexport, 1 },
1440: { "send", "Send an environment variable", env_send, 1 },
1441: { "list", "List the current environment variables",
1442: env_list, 0 },
1443: { "help", 0, env_help, 0 },
1444: { "?", "Print help information", env_help, 0 },
1445: { 0 },
1446: };
1447:
1.67 guenther 1448: static void
1.69 jsg 1449: env_help(void)
1.1 deraadt 1450: {
1451: struct envlist *c;
1452:
1453: for (c = EnvList; c->name; c++) {
1454: if (c->help) {
1455: if (*c->help)
1.10 art 1456: printf("%-15s %s\r\n", c->name, c->help);
1.1 deraadt 1457: else
1.10 art 1458: printf("\r\n");
1.1 deraadt 1459: }
1460: }
1461: }
1462:
1.67 guenther 1463: static struct envlist *
1.69 jsg 1464: getenvcmd(char *name)
1.1 deraadt 1465: {
1466: return (struct envlist *)
1467: genget(name, (char **) EnvList, sizeof(struct envlist));
1468: }
1469:
1.67 guenther 1470: static int
1.69 jsg 1471: env_cmd(int argc, char *argv[])
1.1 deraadt 1472: {
1473: struct envlist *c;
1474:
1475: if (argc < 2) {
1476: fprintf(stderr,
1.10 art 1477: "Need an argument to 'environ' command. 'environ ?' for help.\r\n");
1.1 deraadt 1478: return 0;
1479: }
1480: c = getenvcmd(argv[1]);
1481: if (c == 0) {
1.10 art 1482: fprintf(stderr, "'%s': unknown argument ('environ ?' for help).\r\n",
1.1 deraadt 1483: argv[1]);
1.3 niklas 1484: return 0;
1.1 deraadt 1485: }
1486: if (Ambiguous(c)) {
1.10 art 1487: fprintf(stderr, "'%s': ambiguous argument ('environ ?' for help).\r\n",
1.1 deraadt 1488: argv[1]);
1.3 niklas 1489: return 0;
1.1 deraadt 1490: }
1491: if (c->narg + 2 != argc) {
1492: fprintf(stderr,
1.10 art 1493: "Need %s%d argument%s to 'environ %s' command. 'environ ?' for help.\r\n",
1.1 deraadt 1494: c->narg < argc + 2 ? "only " : "",
1495: c->narg, c->narg == 1 ? "" : "s", c->name);
1496: return 0;
1497: }
1498: (*c->handler)(argv[2], argv[3]);
1499: return 1;
1500: }
1501:
1502: struct env_lst {
1503: struct env_lst *next; /* pointer to next structure */
1504: struct env_lst *prev; /* pointer to previous structure */
1.70 guenther 1505: char *var; /* pointer to variable name */
1506: char *value; /* pointer to variable value */
1.1 deraadt 1507: int export; /* 1 -> export with default list of variables */
1508: int welldefined; /* A well defined variable */
1509: };
1510:
1511: struct env_lst envlisthead;
1512:
1.67 guenther 1513: static struct env_lst *
1.70 guenther 1514: env_find(const char *var)
1.1 deraadt 1515: {
1.39 mpech 1516: struct env_lst *ep;
1.1 deraadt 1517:
1518: for (ep = envlisthead.next; ep; ep = ep->next) {
1.70 guenther 1519: if (strcmp(ep->var, var) == 0)
1.1 deraadt 1520: return(ep);
1521: }
1522: return(NULL);
1523: }
1524:
1.69 jsg 1525: void
1526: env_init(void)
1.1 deraadt 1527: {
1528: extern char **environ;
1.10 art 1529: char **epp, *cp;
1530: struct env_lst *ep;
1.1 deraadt 1531:
1532: for (epp = environ; *epp; epp++) {
1.10 art 1533: if ((cp = strchr(*epp, '='))) {
1.1 deraadt 1534: *cp = '\0';
1.70 guenther 1535: ep = env_define(*epp, cp+1);
1.1 deraadt 1536: ep->export = 0;
1537: *cp = '=';
1538: }
1539: }
1540: /*
1541: * Special case for DISPLAY variable. If it is ":0.0" or
1542: * "unix:0.0", we have to get rid of "unix" and insert our
1543: * hostname.
1544: */
1545: if ((ep = env_find("DISPLAY"))
1546: && ((*ep->value == ':')
1.70 guenther 1547: || (strncmp(ep->value, "unix:", 5) == 0))) {
1.71 ! deraadt 1548: char hbuf[HOST_NAME_MAX+1];
1.70 guenther 1549: char *cp2 = strchr(ep->value, ':');
1.1 deraadt 1550:
1.18 deraadt 1551: gethostname(hbuf, sizeof hbuf);
1.10 art 1552:
1553: /* If this is not the full name, try to get it via DNS */
1554: if (strchr(hbuf, '.') == 0) {
1555: struct hostent *he = gethostbyname(hbuf);
1556: if (he != 0)
1.19 deraadt 1557: strncpy(hbuf, he->h_name, sizeof hbuf-1);
1558: hbuf[sizeof hbuf-1] = '\0';
1.10 art 1559: }
1560:
1.44 pvalchev 1561: if (asprintf (&cp, "%s%s", hbuf, cp2) == -1)
1.14 art 1562: err(1, "asprintf");
1.10 art 1563:
1.1 deraadt 1564: free(ep->value);
1.70 guenther 1565: ep->value = cp;
1.1 deraadt 1566: }
1567: /*
1568: * If USER is not defined, but LOGNAME is, then add
1569: * USER with the value from LOGNAME. By default, we
1570: * don't export the USER variable.
1571: */
1572: if ((env_find("USER") == NULL) && (ep = env_find("LOGNAME"))) {
1.70 guenther 1573: env_define("USER", ep->value);
1574: env_unexport("USER");
1.1 deraadt 1575: }
1.70 guenther 1576: env_export("DISPLAY");
1577: env_export("PRINTER");
1578: env_export("XAUTHORITY");
1.1 deraadt 1579: }
1580:
1.69 jsg 1581: struct env_lst *
1.70 guenther 1582: env_define(const char *var, const char *value)
1.1 deraadt 1583: {
1.39 mpech 1584: struct env_lst *ep;
1.1 deraadt 1585:
1.10 art 1586: if ((ep = env_find(var))) {
1.1 deraadt 1587: if (ep->var)
1588: free(ep->var);
1589: if (ep->value)
1590: free(ep->value);
1591: } else {
1.14 art 1592: if ((ep = malloc(sizeof(struct env_lst))) == NULL)
1593: err(1, "malloc");
1.1 deraadt 1594: ep->next = envlisthead.next;
1595: envlisthead.next = ep;
1596: ep->prev = &envlisthead;
1597: if (ep->next)
1598: ep->next->prev = ep;
1599: }
1.70 guenther 1600: ep->welldefined = opt_welldefined(var);
1.1 deraadt 1601: ep->export = 1;
1.70 guenther 1602: if ((ep->var = strdup(var)) == NULL)
1.14 art 1603: err(1, "strdup");
1.70 guenther 1604: if ((ep->value = strdup(value)) == NULL)
1.14 art 1605: err(1, "strdup");
1.1 deraadt 1606: return(ep);
1607: }
1608:
1.67 guenther 1609: static void
1.70 guenther 1610: env_undefine(const char *var)
1.1 deraadt 1611: {
1.39 mpech 1612: struct env_lst *ep;
1.1 deraadt 1613:
1.10 art 1614: if ((ep = env_find(var))) {
1.1 deraadt 1615: ep->prev->next = ep->next;
1616: if (ep->next)
1617: ep->next->prev = ep->prev;
1618: if (ep->var)
1619: free(ep->var);
1620: if (ep->value)
1621: free(ep->value);
1622: free(ep);
1623: }
1624: }
1625:
1.67 guenther 1626: static void
1.70 guenther 1627: env_export(const char *var)
1.1 deraadt 1628: {
1.39 mpech 1629: struct env_lst *ep;
1.1 deraadt 1630:
1.10 art 1631: if ((ep = env_find(var)))
1.1 deraadt 1632: ep->export = 1;
1633: }
1634:
1.67 guenther 1635: static void
1.70 guenther 1636: env_unexport(const char *var)
1.1 deraadt 1637: {
1.39 mpech 1638: struct env_lst *ep;
1.1 deraadt 1639:
1.15 art 1640: if ((ep = env_find(var)) != NULL)
1.1 deraadt 1641: ep->export = 0;
1642: }
1643:
1.67 guenther 1644: static void
1.70 guenther 1645: env_send(const char *var)
1.1 deraadt 1646: {
1.39 mpech 1647: struct env_lst *ep;
1.1 deraadt 1648:
1.3 niklas 1649: if (my_state_is_wont(TELOPT_NEW_ENVIRON)
1.1 deraadt 1650: ) {
1651: fprintf(stderr,
1.10 art 1652: "Cannot send '%s': Telnet ENVIRON option not enabled\r\n",
1.1 deraadt 1653: var);
1654: return;
1655: }
1656: ep = env_find(var);
1657: if (ep == 0) {
1.10 art 1658: fprintf(stderr, "Cannot send '%s': variable not defined\r\n",
1.1 deraadt 1659: var);
1660: return;
1661: }
1662: env_opt_start_info();
1663: env_opt_add(ep->var);
1664: env_opt_end(0);
1665: }
1666:
1.67 guenther 1667: static void
1.69 jsg 1668: env_list(void)
1.1 deraadt 1669: {
1.39 mpech 1670: struct env_lst *ep;
1.1 deraadt 1671:
1672: for (ep = envlisthead.next; ep; ep = ep->next) {
1.10 art 1673: printf("%c %-20s %s\r\n", ep->export ? '*' : ' ',
1.1 deraadt 1674: ep->var, ep->value);
1675: }
1676: }
1677:
1.70 guenther 1678: char *
1.69 jsg 1679: env_default(int init, int welldefined)
1.1 deraadt 1680: {
1681: static struct env_lst *nep = NULL;
1682:
1683: if (init) {
1684: nep = &envlisthead;
1.10 art 1685: return NULL;
1.1 deraadt 1686: }
1687: if (nep) {
1.10 art 1688: while ((nep = nep->next)) {
1.1 deraadt 1689: if (nep->export && (nep->welldefined == welldefined))
1690: return(nep->var);
1691: }
1692: }
1693: return(NULL);
1694: }
1695:
1.70 guenther 1696: char *
1697: env_getvalue(const char *var, int exported_only)
1.1 deraadt 1698: {
1.39 mpech 1699: struct env_lst *ep;
1.1 deraadt 1700:
1.48 otto 1701: if ((ep = env_find(var)) && (!exported_only || ep->export))
1.1 deraadt 1702: return(ep->value);
1703: return(NULL);
1704: }
1705:
1.68 guenther 1706: static void
1707: connection_status(int local_only)
1708: {
1709: if (!connected)
1710: printf("No connection.\r\n");
1711: else {
1712: printf("Connected to %s.\r\n", hostname);
1713: if (!local_only) {
1714: int mode = getconnmode();
1715:
1716: printf("Operating ");
1717: if (my_want_state_is_will(TELOPT_LINEMODE)) {
1718: printf("with LINEMODE option\r\n"
1719: "%s line editing\r\n"
1720: "%s catching of signals\r\n",
1721: (mode & MODE_EDIT) ? "Local" : "No",
1722: (mode & MODE_TRAPSIG) ? "Local" : "No");
1723: slcstate();
1724: #ifdef KLUDGELINEMODE
1725: } else if (kludgelinemode &&
1726: my_want_state_is_dont(TELOPT_SGA)) {
1727: printf("in obsolete linemode\r\n");
1728: #endif
1729: } else {
1730: printf("in single character mode\r\n");
1731: if (localchars)
1732: printf("Catching signals locally\r\n");
1733: }
1734:
1735: printf("%s character echo\r\n",
1736: (mode & MODE_ECHO) ? "Local" : "Remote");
1737: if (my_want_state_is_will(TELOPT_LFLOW))
1738: printf("%s flow control\r\n",
1739: (mode & MODE_FLOW) ? "Local" : "No");
1740: }
1741: }
1742: printf("Escape character is '%s'.\r\n", control(escape));
1743: (void) fflush(stdout);
1744: }
1745:
1.1 deraadt 1746: /*
1747: * Print status about the connection.
1748: */
1.68 guenther 1749: static int
1750: status(int argc, char *argv[])
1.1 deraadt 1751: {
1.68 guenther 1752: connection_status(0);
1753: return 1;
1.1 deraadt 1754: }
1755:
1756: #ifdef SIGINFO
1757: /*
1758: * Function that gets called when SIGINFO is received.
1759: */
1.10 art 1760: void
1.68 guenther 1761: ayt_status(int sig)
1.1 deraadt 1762: {
1.68 guenther 1763: connection_status(1);
1.1 deraadt 1764: }
1765: #endif
1766:
1.10 art 1767: static Command *getcmd(char *name);
1768:
1769: static void
1770: cmdrc(char *m1, char *m2)
1771: {
1772: static char rcname[128];
1773: Command *c;
1774: FILE *rcfile;
1775: int gotmachine = 0;
1776: int l1 = strlen(m1);
1777: int l2 = strlen(m2);
1.71 ! deraadt 1778: char m1save[HOST_NAME_MAX+1];
1.10 art 1779:
1780: if (skiprc)
1781: return;
1782:
1.34 aaron 1783: strlcpy(m1save, m1, sizeof(m1save));
1.10 art 1784: m1 = m1save;
1785:
1786: if (rcname[0] == 0) {
1787: char *home = getenv("HOME");
1788:
1.29 millert 1789: if (home == NULL || *home == '\0')
1790: return;
1.10 art 1791: snprintf (rcname, sizeof(rcname), "%s/.telnetrc",
1792: home ? home : "");
1793: }
1794:
1795: if ((rcfile = fopen(rcname, "r")) == 0) {
1796: return;
1797: }
1798:
1799: for (;;) {
1800: if (fgets(line, sizeof(line), rcfile) == NULL)
1801: break;
1802: if (line[0] == 0)
1803: break;
1804: if (line[0] == '#')
1805: continue;
1806: if (gotmachine) {
1.60 guenther 1807: if (!isspace((unsigned char)line[0]))
1.10 art 1808: gotmachine = 0;
1809: }
1810: if (gotmachine == 0) {
1.60 guenther 1811: if (isspace((unsigned char)line[0]))
1.10 art 1812: continue;
1813: if (strncasecmp(line, m1, l1) == 0)
1814: strncpy(line, &line[l1], sizeof(line) - l1);
1815: else if (strncasecmp(line, m2, l2) == 0)
1816: strncpy(line, &line[l2], sizeof(line) - l2);
1817: else if (strncasecmp(line, "DEFAULT", 7) == 0)
1818: strncpy(line, &line[7], sizeof(line) - 7);
1819: else
1820: continue;
1821: if (line[0] != ' ' && line[0] != '\t' && line[0] != '\n')
1822: continue;
1823: gotmachine = 1;
1824: }
1825: makeargv();
1826: if (margv[0] == 0)
1827: continue;
1828: c = getcmd(margv[0]);
1829: if (Ambiguous(c)) {
1830: printf("?Ambiguous command: %s\r\n", margv[0]);
1831: continue;
1832: }
1833: if (c == 0) {
1834: printf("?Invalid command: %s\r\n", margv[0]);
1835: continue;
1836: }
1837: /*
1838: * This should never happen...
1839: */
1840: if (c->needconnect && !connected) {
1841: printf("?Need to be connected first for %s.\r\n", margv[0]);
1842: continue;
1843: }
1844: (*c->handler)(margc, margv);
1845: }
1846: fclose(rcfile);
1847: }
1848:
1.69 jsg 1849: int
1850: tn(int argc, char *argv[])
1.1 deraadt 1851: {
1.23 itojun 1852: struct addrinfo hints, *res, *res0;
1853: int error;
1.1 deraadt 1854: struct sockaddr_in sin;
1855: unsigned long temp;
1.10 art 1856: char *srp = 0;
1857: int srlen;
1.5 niklas 1858: char *cmd, *hostp = 0, *portp = 0, *user = 0, *aliasp = 0;
1.31 itojun 1859: int retry;
1860: const int niflags = NI_NUMERICHOST;
1.1 deraadt 1861:
1862: /* clear the socket address prior to use */
1.70 guenther 1863: memset(&sin, 0, sizeof(sin));
1.1 deraadt 1864:
1865: if (connected) {
1.10 art 1866: printf("?Already connected to %s\r\n", hostname);
1.1 deraadt 1867: return 0;
1868: }
1869: if (argc < 2) {
1.43 hin 1870: strlcpy(line, "open ", sizeof(line));
1.1 deraadt 1871: printf("(to) ");
1872: (void) fgets(&line[strlen(line)], sizeof(line) - strlen(line), stdin);
1873: makeargv();
1874: argc = margc;
1875: argv = margv;
1876: }
1877: cmd = *argv;
1878: --argc; ++argv;
1879: while (argc) {
1.3 niklas 1880: if (strcmp(*argv, "help") == 0 || isprefix(*argv, "?"))
1.1 deraadt 1881: goto usage;
1882: if (strcmp(*argv, "-l") == 0) {
1883: --argc; ++argv;
1884: if (argc == 0)
1885: goto usage;
1.14 art 1886: if ((user = strdup(*argv++)) == NULL)
1887: err(1, "strdup");
1.1 deraadt 1888: --argc;
1889: continue;
1890: }
1.5 niklas 1891: if (strcmp(*argv, "-b") == 0) {
1892: --argc; ++argv;
1893: if (argc == 0)
1894: goto usage;
1895: aliasp = *argv++;
1896: --argc;
1897: continue;
1898: }
1.1 deraadt 1899: if (strcmp(*argv, "-a") == 0) {
1900: --argc; ++argv;
1901: autologin = 1;
1902: continue;
1903: }
1904: if (hostp == 0) {
1905: hostp = *argv++;
1906: --argc;
1907: continue;
1908: }
1909: if (portp == 0) {
1910: portp = *argv++;
1911: --argc;
1912: continue;
1913: }
1914: usage:
1.56 guenther 1915: printf("usage: %s [-a] [-b hostalias] [-l user] host-name [port]\r\n", cmd);
1.1 deraadt 1916: return 0;
1917: }
1918: if (hostp == 0)
1919: goto usage;
1920:
1921: if (hostp[0] == '@' || hostp[0] == '!') {
1922: if ((hostname = strrchr(hostp, ':')) == NULL)
1923: hostname = strrchr(hostp, '@');
1924: hostname++;
1925: srp = 0;
1926: temp = sourceroute(hostp, &srp, &srlen);
1927: if (temp == 0) {
1928: herror(srp);
1929: return 0;
1930: } else if (temp == -1) {
1.10 art 1931: printf("Bad source route option: %s\r\n", hostp);
1.1 deraadt 1932: return 0;
1933: } else {
1.10 art 1934: abort();
1.1 deraadt 1935: }
1.23 itojun 1936: } else
1937: {
1938: hostname = hostp;
1939: memset(&hints, 0, sizeof(hints));
1.46 otto 1940: hints.ai_family = family;
1.23 itojun 1941: hints.ai_socktype = SOCK_STREAM;
1942: hints.ai_flags = AI_CANONNAME;
1943: if (portp == NULL) {
1944: portp = "telnet";
1.38 itojun 1945: telnetport = 1;
1.23 itojun 1946: } else if (*portp == '-') {
1947: portp++;
1948: telnetport = 1;
1.38 itojun 1949: } else
1950: telnetport = 0;
1.28 millert 1951: h_errno = 0;
1.23 itojun 1952: error = getaddrinfo(hostp, portp, &hints, &res0);
1953: if (error) {
1.28 millert 1954: if (error == EAI_SERVICE)
1955: warnx("%s: bad port", portp);
1956: else
1957: warnx("%s: %s", hostp, gai_strerror(error));
1958: if (h_errno)
1959: herror(hostp);
1.23 itojun 1960: return 0;
1961: }
1.1 deraadt 1962: }
1.10 art 1963:
1.23 itojun 1964: net = -1;
1965: retry = 0;
1966: for (res = res0; res; res = res->ai_next) {
1967: if (1 /* retry */) {
1.31 itojun 1968: char hbuf[NI_MAXHOST];
1.23 itojun 1969:
1.31 itojun 1970: if (getnameinfo(res->ai_addr, res->ai_addrlen, hbuf, sizeof(hbuf),
1971: NULL, 0, niflags) != 0) {
1.43 hin 1972: strlcpy(hbuf, "(invalid)", sizeof(hbuf));
1.31 itojun 1973: }
1.23 itojun 1974: printf("Trying %s...\r\n", hbuf);
1975: }
1976: net = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
1977: if (net < 0)
1978: continue;
1.51 claudio 1979:
1.55 sthen 1980: if (rtableid >= 0 && (setsockopt(net, SOL_SOCKET, SO_RTABLE, &rtableid,
1981: sizeof(rtableid)) == -1))
1.54 phessler 1982: perror("setsockopt (SO_RTABLE)");
1.10 art 1983:
1.5 niklas 1984: if (aliasp) {
1.23 itojun 1985: struct addrinfo ahints, *ares;
1986:
1987: memset(&ahints, 0, sizeof(ahints));
1.46 otto 1988: ahints.ai_family = family;
1.23 itojun 1989: ahints.ai_socktype = SOCK_STREAM;
1990: ahints.ai_flags = AI_PASSIVE;
1991: error = getaddrinfo(aliasp, "0", &ahints, &ares);
1992: if (error) {
1993: warn("%s: %s", aliasp, gai_strerror(error));
1994: close(net);
1.49 otto 1995: net = -1;
1.23 itojun 1996: continue;
1.5 niklas 1997: }
1.32 itojun 1998: if (bind(net, ares->ai_addr, ares->ai_addrlen) < 0) {
1.31 itojun 1999: perror(aliasp);
2000: (void) close(net); /* dump descriptor */
1.49 otto 2001: net = -1;
1.23 itojun 2002: freeaddrinfo(ares);
2003: continue;
1.5 niklas 2004: }
1.23 itojun 2005: freeaddrinfo(ares);
2006: }
2007: if (srp && res->ai_family == AF_INET
1.56 guenther 2008: && setsockopt(net, IPPROTO_IP, IP_OPTIONS, srp, srlen) < 0)
1.1 deraadt 2009: perror("setsockopt (IP_OPTIONS)");
1.23 itojun 2010: if (res->ai_family == AF_INET) {
1.1 deraadt 2011: if (tos < 0)
1.3 niklas 2012: tos = IPTOS_LOWDELAY; /* Low Delay bit */
1.1 deraadt 2013: if (tos
1.56 guenther 2014: && (setsockopt(net, IPPROTO_IP, IP_TOS, &tos, sizeof(int)) < 0)
1.1 deraadt 2015: && (errno != ENOPROTOOPT))
2016: perror("telnet: setsockopt (IP_TOS) (ignored)");
2017: }
2018:
1.56 guenther 2019: if (debug) {
2020: int one = 1;
2021:
2022: if (setsockopt(net, SOL_SOCKET, SO_DEBUG, &one,
2023: sizeof(one)) < 0)
2024: perror("setsockopt (SO_DEBUG)");
1.1 deraadt 2025: }
2026:
1.23 itojun 2027: if (connect(net, res->ai_addr, res->ai_addrlen) < 0) {
1.31 itojun 2028: char hbuf[NI_MAXHOST];
1.16 deraadt 2029:
1.31 itojun 2030: if (getnameinfo(res->ai_addr, res->ai_addrlen, hbuf, sizeof(hbuf),
2031: NULL, 0, niflags) != 0) {
1.43 hin 2032: strlcpy(hbuf, "(invalid)", sizeof(hbuf));
1.31 itojun 2033: }
1.25 itojun 2034: fprintf(stderr, "telnet: connect to address %s: %s\n", hbuf,
2035: strerror(errno));
1.23 itojun 2036:
2037: close(net);
2038: net = -1;
2039: retry++;
2040: continue;
1.1 deraadt 2041: }
1.23 itojun 2042:
1.1 deraadt 2043: connected++;
1.23 itojun 2044: break;
2045: }
2046: freeaddrinfo(res0);
2047: if (net < 0) {
2048: return 0;
2049: }
1.1 deraadt 2050: cmdrc(hostp, hostname);
2051: if (autologin && user == NULL) {
2052: struct passwd *pw;
2053:
1.58 guenther 2054: user = getlogin();
1.1 deraadt 2055: if (user == NULL ||
1.58 guenther 2056: (pw = getpwnam(user)) == NULL || pw->pw_uid != getuid()) {
1.15 art 2057: if ((pw = getpwuid(getuid())) != NULL)
1.1 deraadt 2058: user = pw->pw_name;
2059: else
2060: user = NULL;
2061: }
2062: }
2063: if (user) {
1.70 guenther 2064: env_define("USER", user);
2065: env_export("USER");
1.1 deraadt 2066: }
1.68 guenther 2067: connection_status(1);
1.1 deraadt 2068: if (setjmp(peerdied) == 0)
2069: telnet(user);
1.67 guenther 2070: (void)close(net);
1.10 art 2071: ExitString("Connection closed by foreign host.\r\n",1);
1.1 deraadt 2072: }
2073:
2074: #define HELPINDENT (sizeof ("connect"))
2075:
2076: static char
2077: openhelp[] = "connect to a site",
2078: closehelp[] = "close current connection",
2079: logouthelp[] = "forcibly logout remote user and close the connection",
2080: quithelp[] = "exit telnet",
2081: statushelp[] = "print status information",
2082: helphelp[] = "print help information",
2083: sendhelp[] = "transmit special characters ('send ?' for more)",
2084: sethelp[] = "set operating parameters ('set ?' for more)",
2085: unsethelp[] = "unset operating parameters ('unset ?' for more)",
2086: togglestring[] ="toggle operating parameters ('toggle ?' for more)",
2087: slchelp[] = "change state of special charaters ('slc ?' for more)",
2088: displayhelp[] = "display operating parameters",
2089: zhelp[] = "suspend telnet",
1.21 deraadt 2090: #ifdef SKEY
2091: skeyhelp[] = "compute response to s/key challenge",
2092: #endif
1.1 deraadt 2093: shellhelp[] = "invoke a subshell",
2094: envhelp[] = "change environment variables ('environ ?' for more)",
2095: modestring[] = "try to enter line or character mode ('mode ?' for more)";
2096:
1.40 millert 2097: static int help(int, char**);
1.1 deraadt 2098:
2099: static Command cmdtab[] = {
2100: { "close", closehelp, bye, 1 },
2101: { "logout", logouthelp, logout, 1 },
2102: { "display", displayhelp, display, 0 },
2103: { "mode", modestring, modecmd, 0 },
2104: { "open", openhelp, tn, 0 },
1.63 guenther 2105: { "quit", quithelp, quitcmd, 0 },
1.1 deraadt 2106: { "send", sendhelp, sendcmd, 0 },
2107: { "set", sethelp, setcmd, 0 },
2108: { "unset", unsethelp, unsetcmd, 0 },
2109: { "status", statushelp, status, 0 },
2110: { "toggle", togglestring, toggle, 0 },
2111: { "slc", slchelp, slccmd, 0 },
1.10 art 2112:
2113: { "z", zhelp, telnetsuspend, 0 },
1.1 deraadt 2114: { "!", shellhelp, shell, 0 },
2115: { "environ", envhelp, env_cmd, 0 },
2116: { "?", helphelp, help, 0 },
1.68 guenther 2117: #ifdef SKEY
1.21 deraadt 2118: { "skey", skeyhelp, skey_calc, 0 },
1.6 deraadt 2119: #endif
1.10 art 2120: { 0, 0, 0, 0 }
1.1 deraadt 2121: };
2122:
2123: static char crmodhelp[] = "deprecated command -- use 'toggle crmod' instead";
2124: static char escapehelp[] = "deprecated command -- use 'set escape' instead";
2125:
2126: static Command cmdtab2[] = {
2127: { "help", 0, help, 0 },
2128: { "escape", escapehelp, setescape, 0 },
2129: { "crmod", crmodhelp, togcrmod, 0 },
1.10 art 2130: { 0, 0, 0, 0 }
1.1 deraadt 2131: };
2132:
2133:
1.69 jsg 2134: static Command *
2135: getcmd(char *name)
1.1 deraadt 2136: {
2137: Command *cm;
2138:
1.10 art 2139: if ((cm = (Command *) genget(name, (char **) cmdtab, sizeof(Command))))
1.1 deraadt 2140: return cm;
2141: return (Command *) genget(name, (char **) cmdtab2, sizeof(Command));
2142: }
2143:
1.69 jsg 2144: void
2145: command(int top, char *tbuf, int cnt)
1.1 deraadt 2146: {
1.39 mpech 2147: Command *c;
1.1 deraadt 2148:
2149: setcommandmode();
2150: if (!top) {
2151: putchar('\n');
2152: } else {
2153: (void) signal(SIGINT, SIG_DFL);
2154: (void) signal(SIGQUIT, SIG_DFL);
2155: }
2156: for (;;) {
2157: if (rlogin == _POSIX_VDISABLE)
2158: printf("%s> ", prompt);
2159: if (tbuf) {
1.39 mpech 2160: char *cp;
1.1 deraadt 2161: cp = line;
2162: while (cnt > 0 && (*cp++ = *tbuf++) != '\n')
2163: cnt--;
2164: tbuf = 0;
2165: if (cp == line || *--cp != '\n' || cp == line)
2166: goto getline;
2167: *cp = '\0';
2168: if (rlogin == _POSIX_VDISABLE)
1.10 art 2169: printf("%s\r\n", line);
1.1 deraadt 2170: } else {
2171: getline:
2172: if (rlogin != _POSIX_VDISABLE)
2173: printf("%s> ", prompt);
2174: if (fgets(line, sizeof(line), stdin) == NULL) {
1.66 guenther 2175: if (feof(stdin) || ferror(stdin))
1.63 guenther 2176: quit();
1.1 deraadt 2177: break;
2178: }
2179: }
2180: if (line[0] == 0)
2181: break;
2182: makeargv();
2183: if (margv[0] == 0) {
2184: break;
2185: }
2186: c = getcmd(margv[0]);
2187: if (Ambiguous(c)) {
1.10 art 2188: printf("?Ambiguous command\r\n");
1.1 deraadt 2189: continue;
2190: }
2191: if (c == 0) {
1.10 art 2192: printf("?Invalid command\r\n");
1.1 deraadt 2193: continue;
2194: }
2195: if (c->needconnect && !connected) {
1.10 art 2196: printf("?Need to be connected first.\r\n");
1.1 deraadt 2197: continue;
2198: }
2199: if ((*c->handler)(margc, margv)) {
2200: break;
2201: }
2202: }
2203: if (!top) {
1.66 guenther 2204: if (!connected)
1.1 deraadt 2205: longjmp(toplevel, 1);
2206: setconnmode(0);
2207: }
2208: }
2209:
2210: /*
2211: * Help command.
2212: */
1.69 jsg 2213: static int
2214: help(int argc, char *argv[])
1.1 deraadt 2215: {
1.39 mpech 2216: Command *c;
1.1 deraadt 2217:
2218: if (argc == 1) {
1.10 art 2219: printf("Commands may be abbreviated. Commands are:\r\n\r\n");
1.1 deraadt 2220: for (c = cmdtab; c->name; c++)
2221: if (c->help) {
1.37 deraadt 2222: printf("%-*s\t%s\r\n", (int)HELPINDENT, c->name,
1.1 deraadt 2223: c->help);
2224: }
2225: return 0;
2226: }
2227: while (--argc > 0) {
1.39 mpech 2228: char *arg;
1.1 deraadt 2229: arg = *++argv;
2230: c = getcmd(arg);
2231: if (Ambiguous(c))
1.10 art 2232: printf("?Ambiguous help command %s\r\n", arg);
1.1 deraadt 2233: else if (c == (Command *)0)
1.10 art 2234: printf("?Invalid help command %s\r\n", arg);
1.1 deraadt 2235: else
1.10 art 2236: printf("%s\r\n", c->help);
1.1 deraadt 2237: }
2238: return 0;
2239: }
2240:
2241: /*
2242: * Source route is handed in as
2243: * [!]@hop1@hop2...[@|:]dst
2244: * If the leading ! is present, it is a
2245: * strict source route, otherwise it is
2246: * assmed to be a loose source route.
2247: *
2248: * We fill in the source route option as
2249: * hop1,hop2,hop3...dest
2250: * and return a pointer to hop1, which will
2251: * be the address to connect() to.
2252: *
2253: * Arguments:
2254: * arg: pointer to route list to decipher
2255: *
2256: * cpp: If *cpp is not equal to NULL, this is a
2257: * pointer to a pointer to a character array
2258: * that should be filled in with the option.
2259: *
2260: * lenp: pointer to an integer that contains the
2261: * length of *cpp if *cpp != NULL.
2262: *
2263: * Return values:
2264: *
2265: * Returns the address of the host to connect to. If the
2266: * return value is -1, there was a syntax error in the
2267: * option, either unknown characters, or too many hosts.
2268: * If the return value is 0, one of the hostnames in the
2269: * path is unknown, and *cpp is set to point to the bad
2270: * hostname.
2271: *
2272: * *cpp: If *cpp was equal to NULL, it will be filled
2273: * in with a pointer to our static area that has
2274: * the option filled in. This will be 32bit aligned.
1.3 niklas 2275: *
1.1 deraadt 2276: * *lenp: This will be filled in with how long the option
2277: * pointed to by *cpp is.
1.3 niklas 2278: *
1.1 deraadt 2279: */
1.67 guenther 2280:
2281: static unsigned long
1.69 jsg 2282: sourceroute(char *arg, char **cpp, int *lenp)
1.1 deraadt 2283: {
2284: static char lsr[44];
2285: char *cp, *cp2, *lsrp, *lsrep;
1.65 guenther 2286: struct in_addr addr;
1.39 mpech 2287: struct hostent *host = 0;
2288: char c;
1.1 deraadt 2289:
2290: /*
2291: * Verify the arguments, and make sure we have
2292: * at least 7 bytes for the option.
2293: */
2294: if (cpp == NULL || lenp == NULL)
2295: return((unsigned long)-1);
2296: if (*cpp != NULL && *lenp < 7)
2297: return((unsigned long)-1);
2298: /*
2299: * Decide whether we have a buffer passed to us,
2300: * or if we need to use our own static buffer.
2301: */
2302: if (*cpp) {
2303: lsrp = *cpp;
2304: lsrep = lsrp + *lenp;
2305: } else {
2306: *cpp = lsrp = lsr;
2307: lsrep = lsrp + 44;
2308: }
2309:
2310: cp = arg;
2311:
2312: /*
2313: * Next, decide whether we have a loose source
2314: * route or a strict source route, and fill in
2315: * the begining of the option.
2316: */
2317: if (*cp == '!') {
2318: cp++;
2319: *lsrp++ = IPOPT_SSRR;
2320: } else
2321: *lsrp++ = IPOPT_LSRR;
2322:
2323: if (*cp != '@')
2324: return((unsigned long)-1);
2325:
2326: lsrp++; /* skip over length, we'll fill it in later */
2327: *lsrp++ = 4;
2328:
2329: cp++;
2330:
1.65 guenther 2331: addr.s_addr = 0;
1.1 deraadt 2332:
2333: for (c = 0;;) {
2334: if (c == ':')
2335: cp2 = 0;
1.10 art 2336: else for (cp2 = cp; (c = *cp2); cp2++) {
1.1 deraadt 2337: if (c == ',') {
2338: *cp2++ = '\0';
2339: if (*cp2 == '@')
2340: cp2++;
2341: } else if (c == '@') {
2342: *cp2++ = '\0';
2343: } else if (c == ':') {
2344: *cp2++ = '\0';
2345: } else
2346: continue;
2347: break;
2348: }
2349: if (!c)
2350: cp2 = 0;
2351:
1.65 guenther 2352: if ((addr.s_addr = inet_addr(cp)) == INADDR_NONE) {
2353: if ((host = gethostbyname(cp)) == NULL) {
2354: *cpp = cp;
2355: return(0);
2356: }
2357: memcpy(&addr, host->h_addr_list[0], sizeof addr);
1.1 deraadt 2358: }
1.65 guenther 2359: memcpy(lsrp, &addr, 4);
1.1 deraadt 2360: lsrp += 4;
2361: if (cp2)
2362: cp = cp2;
2363: else
2364: break;
2365: /*
2366: * Check to make sure there is space for next address
2367: */
2368: if (lsrp + 4 > lsrep)
2369: return((unsigned long)-1);
2370: }
2371: if ((*(*cpp+IPOPT_OLEN) = lsrp - *cpp) <= 7) {
2372: *cpp = 0;
2373: *lenp = 0;
2374: return((unsigned long)-1);
2375: }
2376: *lsrp++ = IPOPT_NOP; /* 32 bit word align it */
2377: *lenp = lsrp - *cpp;
1.65 guenther 2378: return(addr.s_addr);
1.1 deraadt 2379: }
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