Commit | Line | Data |
---|---|---|
22e155fc DF |
1 | /* |
2 | * Copyright (c) 1983 Regents of the University of California. | |
3 | * All rights reserved. The Berkeley software License Agreement | |
4 | * specifies the terms and conditions for redistribution. | |
5 | */ | |
6 | ||
7 | #ifndef lint | |
8 | char copyright[] = | |
9 | "@(#) Copyright (c) 1983 Regents of the University of California.\n\ | |
10 | All rights reserved.\n"; | |
11 | #endif not lint | |
12 | ||
f18adf63 | 13 | #ifndef lint |
5a9a3084 | 14 | static char sccsid[] = "@(#)telnet.c 5.17 (Berkeley) %G%"; |
22e155fc | 15 | #endif not lint |
f18adf63 | 16 | |
a19db822 BJ |
17 | /* |
18 | * User telnet program. | |
5b80ec57 GM |
19 | * |
20 | * Many of the FUNCTIONAL changes in this newest version of telnet | |
21 | * were suggested by Dave Borman of Cray Research, Inc. | |
a19db822 | 22 | */ |
5b80ec57 | 23 | |
de3b21e8 SL |
24 | #include <sys/types.h> |
25 | #include <sys/socket.h> | |
fb8e28da | 26 | #include <sys/ioctl.h> |
040b6435 | 27 | #include <sys/time.h> |
de3b21e8 SL |
28 | |
29 | #include <netinet/in.h> | |
30 | ||
9c1dab9e SL |
31 | #define TELOPTS |
32 | #include <arpa/telnet.h> | |
f2bf20fe | 33 | #include <arpa/inet.h> |
9c1dab9e | 34 | |
a19db822 BJ |
35 | #include <stdio.h> |
36 | #include <ctype.h> | |
37 | #include <errno.h> | |
38 | #include <signal.h> | |
a19db822 | 39 | #include <setjmp.h> |
9f005877 | 40 | #include <netdb.h> |
f2bf20fe | 41 | #include <strings.h> |
de3b21e8 | 42 | |
040b6435 GM |
43 | |
44 | ||
0ea293c6 | 45 | #ifndef FD_SETSIZE |
040b6435 GM |
46 | /* |
47 | * The following is defined just in case someone should want to run | |
48 | * this telnet on a 4.2 system. | |
49 | * | |
040b6435 | 50 | */ |
040b6435 | 51 | |
0ea293c6 GM |
52 | #define FD_SET(n, p) ((p)->fds_bits[0] |= (1<<(n))) |
53 | #define FD_CLR(n, p) ((p)->fds_bits[0] &= ~(1<<(n))) | |
54 | #define FD_ISSET(n, p) ((p)->fds_bits[0] & (1<<(n))) | |
55 | #define FD_ZERO(p) ((p)->fds_bits[0] = 0) | |
040b6435 GM |
56 | |
57 | #endif | |
58 | \f | |
792ffc71 | 59 | #define strip(x) ((x)&0x7f) |
a19db822 | 60 | |
792ffc71 GM |
61 | char ttyobuf[2*BUFSIZ], *tfrontp = ttyobuf, *tbackp = ttyobuf; |
62 | #define TTYADD(c) { if (!(SYNCHing||flushout)) { *tfrontp++ = c; } } | |
63 | #define TTYLOC() (tfrontp) | |
64 | #define TTYMAX() (ttyobuf+sizeof ttyobuf-1) | |
65 | #define TTYMIN() (netobuf) | |
66 | #define TTYBYTES() (tfrontp-tbackp) | |
67 | #define TTYROOM() (TTYMAX()-TTYLOC()+1) | |
3e16c811 | 68 | |
792ffc71 | 69 | char netobuf[2*BUFSIZ], *nfrontp = netobuf, *nbackp = netobuf; |
3e16c811 GM |
70 | #define NETADD(c) { *nfrontp++ = c; } |
71 | #define NET2ADD(c1,c2) { NETADD(c1); NETADD(c2); } | |
72 | #define NETLOC() (nfrontp) | |
792ffc71 GM |
73 | #define NETMAX() (netobuf+sizeof netobuf-1) |
74 | #define NETBYTES() (nfrontp-nbackp) | |
75 | #define NETROOM() (NETMAX()-NETLOC()+1) | |
3e16c811 | 76 | char *neturg = 0; /* one past last byte of urgent data */ |
a19db822 | 77 | |
0ea293c6 GM |
78 | char subbuffer[100], *subpointer, *subend; /* buffer for sub-options */ |
79 | #define SB_CLEAR() subpointer = subbuffer; | |
80 | #define SB_TERM() subend = subpointer; | |
81 | #define SB_ACCUM(c) if (subpointer < (subbuffer+sizeof subbuffer)) { \ | |
82 | *subpointer++ = (c); \ | |
83 | } | |
84 | ||
a19db822 BJ |
85 | char hisopts[256]; |
86 | char myopts[256]; | |
87 | ||
88 | char doopt[] = { IAC, DO, '%', 'c', 0 }; | |
89 | char dont[] = { IAC, DONT, '%', 'c', 0 }; | |
90 | char will[] = { IAC, WILL, '%', 'c', 0 }; | |
91 | char wont[] = { IAC, WONT, '%', 'c', 0 }; | |
92 | ||
3e16c811 GM |
93 | struct cmd { |
94 | char *name; /* command name */ | |
95 | char *help; /* help string */ | |
96 | int (*handler)(); /* routine which executes command */ | |
97 | int dohelp; /* Should we give general help information? */ | |
98 | int needconnect; /* Do we need to be connected to execute? */ | |
99 | }; | |
100 | ||
a19db822 BJ |
101 | int connected; |
102 | int net; | |
3e16c811 | 103 | int tout; |
fb8e28da | 104 | int showoptions = 0; |
4971ba8c | 105 | int debug = 0; |
fb8e28da | 106 | int crmod = 0; |
3e16c811 | 107 | int netdata = 0; |
238f35b1 | 108 | static FILE *NetTrace; |
01ac0b83 | 109 | int telnetport = 1; |
3e16c811 | 110 | |
3e16c811 | 111 | |
a19db822 | 112 | char *prompt; |
fb8e28da | 113 | char escape = CTRL(]); |
40e8c2a3 | 114 | char echoc = CTRL(E); |
f2bf20fe GM |
115 | |
116 | int SYNCHing = 0; /* we are in TELNET SYNCH mode */ | |
117 | int flushout = 0; /* flush output */ | |
792ffc71 | 118 | int autoflush = 0; /* flush output when interrupting? */ |
f2bf20fe | 119 | int autosynch = 0; /* send interrupt characters with SYNCH? */ |
3087f2df GM |
120 | int localchars = 0; /* we recognize interrupt/quit */ |
121 | int donelclchars = 0; /* the user has set "localchars" */ | |
f2bf20fe | 122 | int dontlecho = 0; /* do we suppress local echoing right now? */ |
a19db822 BJ |
123 | |
124 | char line[200]; | |
125 | int margc; | |
126 | char *margv[20]; | |
127 | ||
128 | jmp_buf toplevel; | |
129 | jmp_buf peerdied; | |
130 | ||
131 | extern int errno; | |
132 | ||
a19db822 | 133 | |
fb8e28da | 134 | struct sockaddr_in sin; |
a19db822 | 135 | |
a19db822 | 136 | struct cmd *getcmd(); |
9f005877 | 137 | struct servent *sp; |
a19db822 | 138 | |
40e8c2a3 | 139 | struct tchars otc, ntc; |
792ffc71 | 140 | struct ltchars oltc, nltc; |
40e8c2a3 GM |
141 | struct sgttyb ottyb, nttyb; |
142 | int globalmode = 0; | |
143 | int flushline = 1; | |
144 | ||
145 | char *hostname; | |
146 | char hnamebuf[32]; | |
147 | ||
148 | /* | |
149 | * The following are some clocks used to decide how to interpret | |
040b6435 | 150 | * the relationship between various variables. |
40e8c2a3 GM |
151 | */ |
152 | ||
153 | struct { | |
154 | int | |
155 | system, /* what the current time is */ | |
156 | echotoggle, /* last time user entered echo character */ | |
040b6435 GM |
157 | modenegotiated, /* last time operating mode negotiated */ |
158 | didnetreceive, /* last time we read data from network */ | |
159 | gotDM; /* when did we last see a data mark */ | |
f2bf20fe | 160 | } clocks; |
40e8c2a3 | 161 | |
f2bf20fe | 162 | #define settimer(x) clocks.x = clocks.system++ |
40e8c2a3 GM |
163 | \f |
164 | /* | |
165 | * Various utility routines. | |
166 | */ | |
3e16c811 | 167 | |
f2bf20fe GM |
168 | char *ambiguous; /* special return value */ |
169 | #define Ambiguous(t) ((t)&ambiguous) | |
170 | ||
171 | ||
3e16c811 GM |
172 | char ** |
173 | genget(name, table, next) | |
174 | char *name; /* name to match */ | |
175 | char **table; /* name entry in table */ | |
176 | char **(*next)(); /* routine to return next entry in table */ | |
a19db822 | 177 | { |
3e16c811 GM |
178 | register char *p, *q; |
179 | register char **c, **found; | |
180 | register int nmatches, longest; | |
a19db822 | 181 | |
5a9a3084 GM |
182 | if (name == 0) { |
183 | return 0; | |
184 | } | |
3e16c811 GM |
185 | longest = 0; |
186 | nmatches = 0; | |
187 | found = 0; | |
188 | for (c = table; p = *c; c = (*next)(c)) { | |
189 | for (q = name; *q == *p++; q++) | |
190 | if (*q == 0) /* exact match? */ | |
191 | return (c); | |
192 | if (!*q) { /* the name was a prefix */ | |
193 | if (q - name > longest) { | |
194 | longest = q - name; | |
195 | nmatches = 1; | |
196 | found = c; | |
197 | } else if (q - name == longest) | |
198 | nmatches++; | |
de372207 SL |
199 | } |
200 | } | |
3e16c811 | 201 | if (nmatches > 1) |
f2bf20fe | 202 | return Ambiguous(char **); |
3e16c811 | 203 | return (found); |
a19db822 BJ |
204 | } |
205 | ||
40e8c2a3 GM |
206 | /* |
207 | * Make a character string into a number. | |
208 | * | |
f2bf20fe | 209 | * Todo: 1. Could take random integers (12, 0x12, 012, 0b1). |
40e8c2a3 GM |
210 | */ |
211 | ||
212 | special(s) | |
213 | register char *s; | |
214 | { | |
215 | register char c; | |
216 | char b; | |
217 | ||
218 | switch (*s) { | |
219 | case '^': | |
220 | b = *++s; | |
221 | if (b == '?') { | |
792ffc71 | 222 | c = b | 0x40; /* DEL */ |
40e8c2a3 GM |
223 | } else { |
224 | c = b & 0x1f; | |
225 | } | |
226 | break; | |
227 | default: | |
228 | c = *s; | |
229 | break; | |
230 | } | |
231 | return c; | |
232 | } | |
f2bf20fe GM |
233 | |
234 | /* | |
235 | * Construct a control character sequence | |
236 | * for a special character. | |
237 | */ | |
238 | char * | |
239 | control(c) | |
240 | register int c; | |
241 | { | |
242 | static char buf[3]; | |
243 | ||
792ffc71 | 244 | if (c == 0x7f) |
f2bf20fe GM |
245 | return ("^?"); |
246 | if (c == '\377') { | |
247 | return "off"; | |
248 | } | |
249 | if (c >= 0x20) { | |
250 | buf[0] = c; | |
251 | buf[1] = 0; | |
252 | } else { | |
253 | buf[0] = '^'; | |
254 | buf[1] = '@'+c; | |
255 | buf[2] = 0; | |
256 | } | |
257 | return (buf); | |
258 | } | |
0ea293c6 GM |
259 | |
260 | ||
261 | /* | |
262 | * upcase() | |
263 | * | |
264 | * Upcase (in place) the argument. | |
265 | */ | |
266 | ||
267 | void | |
268 | upcase(argument) | |
269 | register char *argument; | |
270 | { | |
271 | register int c; | |
272 | ||
273 | while (c = *argument) { | |
274 | if (islower(c)) { | |
275 | *argument = toupper(c); | |
276 | } | |
277 | argument++; | |
278 | } | |
279 | } | |
f2bf20fe GM |
280 | \f |
281 | /* | |
282 | * Check to see if any out-of-band data exists on a socket (for | |
283 | * Telnet "synch" processing). | |
284 | */ | |
285 | ||
286 | int | |
287 | stilloob(s) | |
288 | int s; /* socket number */ | |
289 | { | |
290 | static struct timeval timeout = { 0 }; | |
291 | fd_set excepts; | |
292 | int value; | |
293 | ||
294 | do { | |
295 | FD_ZERO(&excepts); | |
296 | FD_SET(s, &excepts); | |
297 | value = select(s+1, (fd_set *)0, (fd_set *)0, &excepts, &timeout); | |
298 | } while ((value == -1) && (errno = EINTR)); | |
299 | ||
300 | if (value < 0) { | |
301 | perror("select"); | |
302 | quit(); | |
303 | } | |
304 | if (FD_ISSET(s, &excepts)) { | |
305 | return 1; | |
306 | } else { | |
307 | return 0; | |
308 | } | |
309 | } | |
310 | ||
311 | ||
312 | /* | |
313 | * netflush | |
314 | * Send as much data as possible to the network, | |
315 | * handling requests for urgent data. | |
316 | */ | |
317 | ||
318 | ||
319 | netflush(fd) | |
320 | { | |
321 | int n; | |
322 | ||
323 | if ((n = nfrontp - nbackp) > 0) { | |
324 | if (!neturg) { | |
325 | n = write(fd, nbackp, n); /* normal write */ | |
326 | } else { | |
327 | n = neturg - nbackp; | |
328 | /* | |
329 | * In 4.2 (and 4.3) systems, there is some question about | |
330 | * what byte in a sendOOB operation is the "OOB" data. | |
331 | * To make ourselves compatible, we only send ONE byte | |
332 | * out of band, the one WE THINK should be OOB (though | |
333 | * we really have more the TCP philosophy of urgent data | |
334 | * rather than the Unix philosophy of OOB data). | |
335 | */ | |
336 | if (n > 1) { | |
337 | n = send(fd, nbackp, n-1, 0); /* send URGENT all by itself */ | |
338 | } else { | |
339 | n = send(fd, nbackp, n, MSG_OOB); /* URGENT data */ | |
340 | } | |
341 | } | |
342 | } | |
343 | if (n < 0) { | |
344 | if (errno != ENOBUFS && errno != EWOULDBLOCK) { | |
345 | setcommandmode(); | |
346 | perror(hostname); | |
347 | close(fd); | |
348 | neturg = 0; | |
349 | longjmp(peerdied, -1); | |
350 | /*NOTREACHED*/ | |
351 | } | |
352 | n = 0; | |
353 | } | |
354 | if (netdata && n) { | |
355 | Dump('>', nbackp, n); | |
356 | } | |
357 | nbackp += n; | |
358 | if (nbackp >= neturg) { | |
359 | neturg = 0; | |
360 | } | |
361 | if (nbackp == nfrontp) { | |
362 | nbackp = nfrontp = netobuf; | |
363 | } | |
364 | } | |
3087f2df GM |
365 | \f |
366 | /* | |
367 | * nextitem() | |
368 | * | |
369 | * Return the address of the next "item" in the TELNET data | |
370 | * stream. This will be the address of the next character if | |
371 | * the current address is a user data character, or it will | |
372 | * be the address of the character following the TELNET command | |
373 | * if the current address is a TELNET IAC ("I Am a Command") | |
374 | * character. | |
375 | */ | |
376 | ||
377 | char * | |
378 | nextitem(current) | |
379 | char *current; | |
380 | { | |
381 | if ((*current&0xff) != IAC) { | |
382 | return current+1; | |
383 | } | |
384 | switch (*(current+1)&0xff) { | |
385 | case DO: | |
386 | case DONT: | |
387 | case WILL: | |
388 | case WONT: | |
389 | return current+3; | |
390 | case SB: /* loop forever looking for the SE */ | |
391 | { | |
392 | register char *look = current+2; | |
393 | ||
394 | for (;;) { | |
395 | if ((*look++&0xff) == IAC) { | |
396 | if ((*look++&0xff) == SE) { | |
397 | return look; | |
398 | } | |
399 | } | |
400 | } | |
401 | } | |
402 | default: | |
403 | return current+2; | |
404 | } | |
405 | } | |
406 | /* | |
407 | * netclear() | |
408 | * | |
409 | * We are about to do a TELNET SYNCH operation. Clear | |
410 | * the path to the network. | |
411 | * | |
412 | * Things are a bit tricky since we may have sent the first | |
413 | * byte or so of a previous TELNET command into the network. | |
414 | * So, we have to scan the network buffer from the beginning | |
415 | * until we are up to where we want to be. | |
416 | * | |
417 | * A side effect of what we do, just to keep things | |
418 | * simple, is to clear the urgent data pointer. The principal | |
419 | * caller should be setting the urgent data pointer AFTER calling | |
420 | * us in any case. | |
421 | */ | |
422 | ||
423 | netclear() | |
424 | { | |
425 | register char *thisitem, *next; | |
426 | char *good; | |
427 | #define wewant(p) ((nfrontp > p) && ((*p&0xff) == IAC) && \ | |
428 | ((*(p+1)&0xff) != EC) && ((*(p+1)&0xff) != EL)) | |
f2bf20fe | 429 | |
3087f2df GM |
430 | thisitem = netobuf; |
431 | ||
432 | while ((next = nextitem(thisitem)) <= nbackp) { | |
433 | thisitem = next; | |
434 | } | |
435 | ||
436 | /* Now, thisitem is first before/at boundary. */ | |
437 | ||
438 | good = netobuf; /* where the good bytes go */ | |
439 | ||
440 | while (nfrontp > thisitem) { | |
441 | if (wewant(thisitem)) { | |
442 | int length; | |
443 | ||
444 | next = thisitem; | |
445 | do { | |
446 | next = nextitem(next); | |
447 | } while (wewant(next) && (nfrontp > next)); | |
448 | length = next-thisitem; | |
449 | bcopy(thisitem, good, length); | |
450 | good += length; | |
451 | thisitem = next; | |
452 | } else { | |
453 | thisitem = nextitem(thisitem); | |
454 | } | |
455 | } | |
456 | ||
457 | nbackp = netobuf; | |
458 | nfrontp = good; /* next byte to be sent */ | |
459 | neturg = 0; | |
460 | } | |
461 | \f | |
f2bf20fe GM |
462 | /* |
463 | * Send as much data as possible to the terminal. | |
464 | */ | |
465 | ||
466 | ||
467 | ttyflush() | |
468 | { | |
469 | int n; | |
470 | ||
471 | if ((n = tfrontp - tbackp) > 0) { | |
792ffc71 | 472 | if (!(SYNCHing||flushout)) { |
f2bf20fe GM |
473 | n = write(tout, tbackp, n); |
474 | } else { | |
475 | ioctl(fileno(stdout), TIOCFLUSH, (char *) 0); | |
792ffc71 | 476 | /* we leave 'n' alone! */ |
f2bf20fe GM |
477 | } |
478 | } | |
479 | if (n < 0) { | |
480 | return; | |
481 | } | |
482 | tbackp += n; | |
483 | if (tbackp == tfrontp) { | |
484 | tbackp = tfrontp = ttyobuf; | |
485 | } | |
486 | } | |
40e8c2a3 GM |
487 | \f |
488 | /* | |
489 | * Various signal handling routines. | |
490 | */ | |
491 | ||
492 | deadpeer() | |
493 | { | |
494 | setcommandmode(); | |
495 | longjmp(peerdied, -1); | |
496 | } | |
497 | ||
498 | intr() | |
499 | { | |
3087f2df | 500 | if (localchars) { |
40e8c2a3 GM |
501 | intp(); |
502 | return; | |
503 | } | |
504 | setcommandmode(); | |
505 | longjmp(toplevel, -1); | |
506 | } | |
507 | ||
508 | intr2() | |
509 | { | |
3087f2df | 510 | if (localchars) { |
40e8c2a3 GM |
511 | sendbrk(); |
512 | return; | |
513 | } | |
514 | } | |
515 | ||
516 | doescape() | |
517 | { | |
518 | command(0); | |
519 | } | |
520 | \f | |
f2bf20fe GM |
521 | /* |
522 | * The following are routines used to print out debugging information. | |
523 | */ | |
524 | ||
525 | ||
526 | static | |
527 | Dump(direction, buffer, length) | |
528 | char direction; | |
529 | char *buffer; | |
530 | int length; | |
531 | { | |
532 | # define BYTES_PER_LINE 32 | |
533 | # define min(x,y) ((x<y)? x:y) | |
534 | char *pThis; | |
535 | int offset; | |
536 | ||
537 | offset = 0; | |
538 | ||
539 | while (length) { | |
540 | /* print one line */ | |
541 | fprintf(NetTrace, "%c 0x%x\t", direction, offset); | |
542 | pThis = buffer; | |
543 | buffer = buffer+min(length, BYTES_PER_LINE); | |
544 | while (pThis < buffer) { | |
545 | fprintf(NetTrace, "%.2x", (*pThis)&0xff); | |
546 | pThis++; | |
547 | } | |
548 | fprintf(NetTrace, "\n"); | |
549 | length -= BYTES_PER_LINE; | |
550 | offset += BYTES_PER_LINE; | |
551 | if (length < 0) { | |
552 | return; | |
553 | } | |
554 | /* find next unique line */ | |
555 | } | |
556 | } | |
557 | ||
558 | ||
559 | /*VARARGS*/ | |
560 | printoption(direction, fmt, option, what) | |
561 | char *direction, *fmt; | |
562 | int option, what; | |
563 | { | |
564 | if (!showoptions) | |
565 | return; | |
0ea293c6 | 566 | printf("%s ", direction+1); |
f2bf20fe GM |
567 | if (fmt == doopt) |
568 | fmt = "do"; | |
569 | else if (fmt == dont) | |
570 | fmt = "dont"; | |
571 | else if (fmt == will) | |
572 | fmt = "will"; | |
573 | else if (fmt == wont) | |
574 | fmt = "wont"; | |
575 | else | |
576 | fmt = "???"; | |
0ea293c6 | 577 | if (option < (sizeof telopts/sizeof telopts[0])) |
f2bf20fe GM |
578 | printf("%s %s", fmt, telopts[option]); |
579 | else | |
580 | printf("%s %d", fmt, option); | |
581 | if (*direction == '<') { | |
582 | printf("\r\n"); | |
583 | return; | |
584 | } | |
585 | printf(" (%s)\r\n", what ? "reply" : "don't reply"); | |
586 | } | |
587 | \f | |
40e8c2a3 GM |
588 | /* |
589 | * Mode - set up terminal to a specific mode. | |
590 | */ | |
a19db822 | 591 | |
a19db822 | 592 | |
3e16c811 GM |
593 | mode(f) |
594 | register int f; | |
a19db822 | 595 | { |
3e16c811 GM |
596 | static int prevmode = 0; |
597 | struct tchars *tc; | |
598 | struct ltchars *ltc; | |
599 | struct sgttyb sb; | |
600 | int onoff, old; | |
792ffc71 GM |
601 | struct tchars notc2; |
602 | struct ltchars noltc2; | |
603 | static struct tchars notc = { -1, -1, -1, -1, -1, -1 }; | |
604 | static struct ltchars noltc = { -1, -1, -1, -1, -1, -1 }; | |
a19db822 | 605 | |
40e8c2a3 | 606 | globalmode = f; |
3e16c811 | 607 | if (prevmode == f) |
f2bf20fe | 608 | return; |
3e16c811 GM |
609 | old = prevmode; |
610 | prevmode = f; | |
40e8c2a3 | 611 | sb = nttyb; |
3e16c811 | 612 | switch (f) { |
a19db822 | 613 | |
3e16c811 GM |
614 | case 0: |
615 | onoff = 0; | |
616 | tc = &otc; | |
617 | ltc = &oltc; | |
618 | break; | |
a19db822 | 619 | |
40e8c2a3 GM |
620 | case 1: /* remote character processing, remote echo */ |
621 | case 2: /* remote character processing, local echo */ | |
3e16c811 GM |
622 | sb.sg_flags |= CBREAK; |
623 | if (f == 1) | |
624 | sb.sg_flags &= ~(ECHO|CRMOD); | |
625 | else | |
626 | sb.sg_flags |= ECHO|CRMOD; | |
627 | sb.sg_erase = sb.sg_kill = -1; | |
628 | tc = ¬c; | |
40e8c2a3 GM |
629 | /* |
630 | * If user hasn't specified one way or the other, | |
631 | * then default to not trapping signals. | |
632 | */ | |
3087f2df GM |
633 | if (!donelclchars) { |
634 | localchars = 0; | |
792ffc71 | 635 | } |
3087f2df | 636 | if (localchars) { |
40e8c2a3 GM |
637 | notc2 = notc; |
638 | notc2.t_intrc = ntc.t_intrc; | |
639 | notc2.t_quitc = ntc.t_quitc; | |
40e8c2a3 GM |
640 | tc = ¬c2; |
641 | } else | |
642 | tc = ¬c; | |
3e16c811 GM |
643 | ltc = &noltc; |
644 | onoff = 1; | |
40e8c2a3 GM |
645 | break; |
646 | case 3: /* local character processing, remote echo */ | |
647 | case 4: /* local character processing, local echo */ | |
648 | case 5: /* local character processing, no echo */ | |
649 | sb.sg_flags &= ~CBREAK; | |
650 | sb.sg_flags |= CRMOD; | |
651 | if (f == 4) | |
652 | sb.sg_flags |= ECHO; | |
653 | else | |
654 | sb.sg_flags &= ~ECHO; | |
792ffc71 GM |
655 | notc2 = ntc; |
656 | tc = ¬c2; | |
657 | noltc2 = oltc; | |
658 | ltc = &noltc2; | |
40e8c2a3 GM |
659 | /* |
660 | * If user hasn't specified one way or the other, | |
661 | * then default to trapping signals. | |
662 | */ | |
3087f2df GM |
663 | if (!donelclchars) { |
664 | localchars = 1; | |
792ffc71 | 665 | } |
3087f2df | 666 | if (localchars) { |
792ffc71 GM |
667 | notc2.t_brkc = nltc.t_flushc; |
668 | noltc2.t_flushc = -1; | |
669 | } else { | |
40e8c2a3 | 670 | notc2.t_intrc = notc2.t_quitc = -1; |
40e8c2a3 | 671 | } |
40e8c2a3 GM |
672 | noltc2.t_suspc = escape; |
673 | noltc2.t_dsuspc = -1; | |
40e8c2a3 | 674 | onoff = 1; |
3e16c811 GM |
675 | break; |
676 | ||
677 | default: | |
678 | return; | |
a19db822 | 679 | } |
3e16c811 GM |
680 | ioctl(fileno(stdin), TIOCSLTC, (char *)ltc); |
681 | ioctl(fileno(stdin), TIOCSETC, (char *)tc); | |
682 | ioctl(fileno(stdin), TIOCSETP, (char *)&sb); | |
f2bf20fe GM |
683 | ioctl(fileno(stdin), FIONBIO, (char *)&onoff); |
684 | ioctl(fileno(stdout), FIONBIO, (char *)&onoff); | |
40e8c2a3 GM |
685 | if (f >= 3) |
686 | signal(SIGTSTP, doescape); | |
687 | else if (old >= 3) { | |
688 | signal(SIGTSTP, SIG_DFL); | |
689 | sigsetmask(sigblock(0) & ~(1<<(SIGTSTP-1))); | |
690 | } | |
a19db822 | 691 | } |
f2bf20fe | 692 | \f |
40e8c2a3 GM |
693 | /* |
694 | * These routines decides on what the mode should be (based on the values | |
695 | * of various global variables). | |
696 | */ | |
697 | ||
040b6435 GM |
698 | char *modedescriptions[] = { |
699 | "telnet command mode", /* 0 */ | |
700 | "character-at-a-time mode", /* 1 */ | |
701 | "character-at-a-time mode (local echo)", /* 2 */ | |
702 | "line-by-line mode (remote echo)", /* 3 */ | |
703 | "line-by-line mode", /* 4 */ | |
704 | "line-by-line mode (local echoing suppressed)", /* 5 */ | |
705 | }; | |
706 | ||
707 | getconnmode() | |
40e8c2a3 GM |
708 | { |
709 | static char newmode[8] = { 4, 5, 3, 3, 2, 2, 1, 1 }; | |
f2bf20fe | 710 | int modeindex = 0; |
40e8c2a3 GM |
711 | |
712 | if (hisopts[TELOPT_ECHO]) { | |
f2bf20fe | 713 | modeindex += 2; |
40e8c2a3 GM |
714 | } |
715 | if (hisopts[TELOPT_SGA]) { | |
f2bf20fe | 716 | modeindex += 4; |
40e8c2a3 | 717 | } |
f2bf20fe GM |
718 | if (dontlecho && (clocks.echotoggle > clocks.modenegotiated)) { |
719 | modeindex += 1; | |
40e8c2a3 | 720 | } |
f2bf20fe | 721 | return newmode[modeindex]; |
040b6435 GM |
722 | } |
723 | ||
724 | setconnmode() | |
725 | { | |
726 | mode(getconnmode()); | |
40e8c2a3 GM |
727 | } |
728 | ||
729 | ||
730 | setcommandmode() | |
731 | { | |
732 | mode(0); | |
733 | } | |
734 | \f | |
3e16c811 GM |
735 | char sibuf[BUFSIZ], *sbp; |
736 | char tibuf[BUFSIZ], *tbp; | |
737 | int scc, tcc; | |
a19db822 | 738 | |
792ffc71 | 739 | |
a19db822 | 740 | /* |
3e16c811 | 741 | * Select from tty and network... |
a19db822 | 742 | */ |
3e16c811 | 743 | telnet() |
a19db822 BJ |
744 | { |
745 | register int c; | |
3e16c811 | 746 | int tin = fileno(stdin); |
a19db822 | 747 | int on = 1; |
3087f2df | 748 | fd_set ibits, obits, xbits; |
a19db822 | 749 | |
3e16c811 | 750 | tout = fileno(stdout); |
40e8c2a3 | 751 | setconnmode(); |
792ffc71 GM |
752 | scc = 0; |
753 | tcc = 0; | |
3087f2df GM |
754 | FD_ZERO(&ibits); |
755 | FD_ZERO(&obits); | |
756 | FD_ZERO(&xbits); | |
757 | ||
f2bf20fe | 758 | ioctl(net, FIONBIO, (char *)&on); |
0ea293c6 GM |
759 | #if defined(SO_OOBINLINE) |
760 | setsockopt(net, SOL_SOCKET, SO_OOBINLINE, &on, sizeof on); | |
761 | #endif /* defined(SO_OOBINLINE) */ | |
762 | if (telnetport) { | |
763 | if (!hisopts[TELOPT_SGA]) { | |
764 | willoption(TELOPT_SGA, 0); | |
765 | } | |
766 | if (!myopts[TELOPT_TTYPE]) { | |
767 | dooption(TELOPT_TTYPE, 0); | |
768 | } | |
3e16c811 | 769 | } |
a19db822 | 770 | for (;;) { |
40e8c2a3 | 771 | if (scc < 0 && tcc < 0) { |
a19db822 | 772 | break; |
40e8c2a3 GM |
773 | } |
774 | ||
792ffc71 | 775 | if (((globalmode < 4) || flushline) && NETBYTES()) { |
40e8c2a3 | 776 | FD_SET(net, &obits); |
3e16c811 | 777 | } else { |
40e8c2a3 | 778 | FD_SET(tin, &ibits); |
3e16c811 | 779 | } |
792ffc71 | 780 | if (TTYBYTES()) { |
40e8c2a3 GM |
781 | FD_SET(tout, &obits); |
782 | } else { | |
783 | FD_SET(net, &ibits); | |
784 | } | |
f2bf20fe | 785 | if (!SYNCHing) { |
40e8c2a3 GM |
786 | FD_SET(net, &xbits); |
787 | } | |
f2bf20fe GM |
788 | if ((c = select(16, &ibits, &obits, &xbits, |
789 | (struct timeval *)0)) < 1) { | |
40e8c2a3 GM |
790 | if (c == -1) { |
791 | /* | |
792 | * we can get EINTR if we are in line mode, | |
793 | * and the user does an escape (TSTP), or | |
794 | * some other signal generator. | |
795 | */ | |
796 | if (errno == EINTR) { | |
797 | continue; | |
798 | } | |
799 | } | |
a19db822 BJ |
800 | sleep(5); |
801 | continue; | |
802 | } | |
803 | ||
3e16c811 GM |
804 | /* |
805 | * Any urgent data? | |
806 | */ | |
40e8c2a3 | 807 | if (FD_ISSET(net, &xbits)) { |
3087f2df | 808 | FD_CLR(net, &xbits); |
f2bf20fe | 809 | SYNCHing = 1; |
3e16c811 GM |
810 | ttyflush(); /* flush already enqueued data */ |
811 | } | |
812 | ||
a19db822 BJ |
813 | /* |
814 | * Something to read from the network... | |
815 | */ | |
40e8c2a3 | 816 | if (FD_ISSET(net, &ibits)) { |
792ffc71 GM |
817 | int canread; |
818 | ||
3087f2df | 819 | FD_CLR(net, &ibits); |
792ffc71 GM |
820 | if (scc == 0) { |
821 | sbp = sibuf; | |
822 | } | |
823 | canread = sibuf + sizeof sibuf - sbp; | |
0ea293c6 | 824 | #if !defined(SO_OOBINLINE) |
040b6435 GM |
825 | /* |
826 | * In 4.2 (and some early 4.3) systems, the | |
827 | * OOB indication and data handling in the kernel | |
828 | * is such that if two separate TCP Urgent requests | |
829 | * come in, one byte of TCP data will be overlaid. | |
830 | * This is fatal for Telnet, but we try to live | |
831 | * with it. | |
832 | * | |
833 | * In addition, in 4.2 (and...), a special protocol | |
834 | * is needed to pick up the TCP Urgent data in | |
835 | * the correct sequence. | |
836 | * | |
837 | * What we do is: if we think we are in urgent | |
838 | * mode, we look to see if we are "at the mark". | |
839 | * If we are, we do an OOB receive. If we run | |
840 | * this twice, we will do the OOB receive twice, | |
841 | * but the second will fail, since the second | |
842 | * time we were "at the mark", but there wasn't | |
843 | * any data there (the kernel doesn't reset | |
844 | * "at the mark" until we do a normal read). | |
845 | * Once we've read the OOB data, we go ahead | |
846 | * and do normal reads. | |
847 | * | |
848 | * There is also another problem, which is that | |
849 | * since the OOB byte we read doesn't put us | |
850 | * out of OOB state, and since that byte is most | |
851 | * likely the TELNET DM (data mark), we would | |
f2bf20fe | 852 | * stay in the TELNET SYNCH (SYNCHing) state. |
040b6435 GM |
853 | * So, clocks to the rescue. If we've "just" |
854 | * received a DM, then we test for the | |
855 | * presence of OOB data when the receive OOB | |
856 | * fails (and AFTER we did the normal mode read | |
857 | * to clear "at the mark"). | |
858 | */ | |
f2bf20fe | 859 | if (SYNCHing) { |
040b6435 GM |
860 | int atmark; |
861 | ||
f2bf20fe | 862 | ioctl(net, SIOCATMARK, (char *)&atmark); |
040b6435 | 863 | if (atmark) { |
792ffc71 GM |
864 | c = recv(net, sibuf, canread, MSG_OOB); |
865 | if ((c == -1) && (errno == EINVAL)) { | |
866 | c = read(net, sibuf, canread); | |
f2bf20fe GM |
867 | if (clocks.didnetreceive < clocks.gotDM) { |
868 | SYNCHing = stilloob(net); | |
238f35b1 | 869 | } |
040b6435 GM |
870 | } |
871 | } else { | |
792ffc71 | 872 | c = read(net, sibuf, canread); |
040b6435 GM |
873 | } |
874 | } else { | |
792ffc71 | 875 | c = read(net, sibuf, canread); |
040b6435 GM |
876 | } |
877 | settimer(didnetreceive); | |
0ea293c6 | 878 | #else /* !defined(SO_OOBINLINE) */ |
792ffc71 | 879 | c = read(net, sbp, canread); |
0ea293c6 | 880 | #endif /* !defined(SO_OOBINLINE) */ |
792ffc71 GM |
881 | if (c < 0 && errno == EWOULDBLOCK) { |
882 | c = 0; | |
883 | } else if (c <= 0) { | |
884 | break; | |
040b6435 | 885 | } |
792ffc71 GM |
886 | if (netdata) { |
887 | Dump('<', sbp, c); | |
888 | } | |
889 | scc += c; | |
a19db822 BJ |
890 | } |
891 | ||
892 | /* | |
893 | * Something to read from the tty... | |
894 | */ | |
40e8c2a3 | 895 | if (FD_ISSET(tin, &ibits)) { |
3087f2df | 896 | FD_CLR(tin, &ibits); |
792ffc71 GM |
897 | if (tcc == 0) { |
898 | tbp = tibuf; /* nothing left, reset */ | |
899 | } | |
900 | c = read(tin, tbp, tibuf+sizeof tibuf - tbp); | |
901 | if (c < 0 && errno == EWOULDBLOCK) { | |
902 | c = 0; | |
0ea293c6 GM |
903 | } else { |
904 | /* EOF detection for line mode!!!! */ | |
905 | if (c == 0 && globalmode >= 3) { | |
906 | /* must be an EOF... */ | |
907 | *tbp = ntc.t_eofc; | |
908 | c = 1; | |
909 | } | |
910 | if (c <= 0) { | |
911 | tcc = c; | |
912 | break; | |
913 | } | |
a19db822 | 914 | } |
792ffc71 | 915 | tcc += c; |
a19db822 BJ |
916 | } |
917 | ||
918 | while (tcc > 0) { | |
f2bf20fe | 919 | register int sc; |
a19db822 | 920 | |
792ffc71 | 921 | if (NETROOM() < 2) { |
40e8c2a3 | 922 | flushline = 1; |
a19db822 | 923 | break; |
40e8c2a3 | 924 | } |
f2bf20fe GM |
925 | c = *tbp++ & 0xff, sc = strip(c), tcc--; |
926 | if (sc == escape) { | |
a19db822 BJ |
927 | command(0); |
928 | tcc = 0; | |
40e8c2a3 | 929 | flushline = 1; |
a19db822 | 930 | break; |
3087f2df | 931 | } else if ((globalmode >= 4) && (sc == echoc)) { |
40e8c2a3 GM |
932 | if (tcc > 0 && strip(*tbp) == echoc) { |
933 | tbp++; | |
934 | tcc--; | |
935 | } else { | |
936 | dontlecho = !dontlecho; | |
937 | settimer(echotoggle); | |
938 | setconnmode(); | |
939 | tcc = 0; | |
940 | flushline = 1; | |
941 | break; | |
942 | } | |
943 | } | |
3087f2df | 944 | if (localchars) { |
f2bf20fe | 945 | if (sc == ntc.t_intrc) { |
40e8c2a3 GM |
946 | intp(); |
947 | break; | |
f2bf20fe | 948 | } else if (sc == ntc.t_quitc) { |
40e8c2a3 GM |
949 | sendbrk(); |
950 | break; | |
792ffc71 GM |
951 | } else if (sc == nltc.t_flushc) { |
952 | NET2ADD(IAC, AO); | |
953 | if (autoflush) { | |
954 | doflush(); | |
955 | } | |
956 | break; | |
40e8c2a3 GM |
957 | } else if (globalmode > 2) { |
958 | ; | |
f2bf20fe | 959 | } else if (sc == nttyb.sg_kill) { |
40e8c2a3 GM |
960 | NET2ADD(IAC, EL); |
961 | break; | |
f2bf20fe | 962 | } else if (sc == nttyb.sg_erase) { |
40e8c2a3 GM |
963 | NET2ADD(IAC, EC); |
964 | break; | |
965 | } | |
a19db822 | 966 | } |
40bf00b7 RC |
967 | switch (c) { |
968 | case '\n': | |
238f35b1 | 969 | /* |
35d48dd0 GM |
970 | * If we are in CRMOD mode (\r ==> \n) |
971 | * on our local machine, then probably | |
972 | * a newline (unix) is CRLF (TELNET). | |
238f35b1 | 973 | */ |
35d48dd0 | 974 | if (globalmode >= 3) { |
3e16c811 GM |
975 | NETADD('\r'); |
976 | } | |
977 | NETADD('\n'); | |
40e8c2a3 | 978 | flushline = 1; |
40bf00b7 RC |
979 | break; |
980 | case '\r': | |
3e16c811 | 981 | NET2ADD('\r', '\0'); |
40e8c2a3 | 982 | flushline = 1; |
40bf00b7 RC |
983 | break; |
984 | case IAC: | |
3e16c811 | 985 | NET2ADD(IAC, IAC); |
238f35b1 | 986 | break; |
40bf00b7 | 987 | default: |
3e16c811 | 988 | NETADD(c); |
40bf00b7 RC |
989 | break; |
990 | } | |
a19db822 | 991 | } |
40e8c2a3 | 992 | if (((globalmode < 4) || flushline) && |
792ffc71 | 993 | FD_ISSET(net, &obits) && (NETBYTES() > 0)) { |
3087f2df | 994 | FD_CLR(net, &obits); |
3e16c811 | 995 | netflush(net); |
40e8c2a3 | 996 | } |
a19db822 BJ |
997 | if (scc > 0) |
998 | telrcv(); | |
3087f2df GM |
999 | if (FD_ISSET(tout, &obits) && (TTYBYTES() > 0)) { |
1000 | FD_CLR(tout, &obits); | |
3e16c811 | 1001 | ttyflush(); |
3087f2df | 1002 | } |
a19db822 | 1003 | } |
40e8c2a3 | 1004 | setcommandmode(); |
a19db822 | 1005 | } |
40e8c2a3 | 1006 | \f |
a19db822 BJ |
1007 | /* |
1008 | * Telnet receiver states for fsm | |
1009 | */ | |
1010 | #define TS_DATA 0 | |
1011 | #define TS_IAC 1 | |
1012 | #define TS_WILL 2 | |
1013 | #define TS_WONT 3 | |
1014 | #define TS_DO 4 | |
1015 | #define TS_DONT 5 | |
238f35b1 | 1016 | #define TS_CR 6 |
0ea293c6 GM |
1017 | #define TS_SB 7 /* sub-option collection */ |
1018 | #define TS_SE 8 /* looking for sub-option end */ | |
a19db822 BJ |
1019 | |
1020 | telrcv() | |
1021 | { | |
1022 | register int c; | |
1023 | static int state = TS_DATA; | |
1024 | ||
792ffc71 | 1025 | while ((scc > 0) && (TTYROOM() > 2)) { |
f2bf20fe | 1026 | c = *sbp++ & 0xff, scc--; |
a19db822 BJ |
1027 | switch (state) { |
1028 | ||
238f35b1 GM |
1029 | case TS_CR: |
1030 | state = TS_DATA; | |
792ffc71 GM |
1031 | if (c == '\0') { |
1032 | break; /* Ignore \0 after CR */ | |
1033 | } else if (c == '\n') { | |
1034 | if (hisopts[TELOPT_ECHO] && !crmod) { | |
1035 | TTYADD(c); | |
1036 | } | |
1037 | break; | |
238f35b1 | 1038 | } |
792ffc71 | 1039 | /* Else, fall through */ |
238f35b1 | 1040 | |
a19db822 | 1041 | case TS_DATA: |
fb8e28da | 1042 | if (c == IAC) { |
a19db822 | 1043 | state = TS_IAC; |
fb8e28da SL |
1044 | continue; |
1045 | } | |
792ffc71 GM |
1046 | /* |
1047 | * The 'crmod' hack (see following) is needed | |
1048 | * since we can't * set CRMOD on output only. | |
1049 | * Machines like MULTICS like to send \r without | |
1050 | * \n; since we must turn off CRMOD to get proper | |
1051 | * input, the mapping is done here (sigh). | |
1052 | */ | |
238f35b1 GM |
1053 | if (c == '\r') { |
1054 | if (scc > 0) { | |
f2bf20fe | 1055 | c = *sbp&0xff; |
238f35b1 GM |
1056 | if (c == 0) { |
1057 | sbp++, scc--; | |
792ffc71 | 1058 | /* a "true" CR */ |
3e16c811 | 1059 | TTYADD('\r'); |
238f35b1 GM |
1060 | } else if (!hisopts[TELOPT_ECHO] && |
1061 | (c == '\n')) { | |
1062 | sbp++, scc--; | |
3e16c811 | 1063 | TTYADD('\n'); |
238f35b1 | 1064 | } else { |
3e16c811 | 1065 | TTYADD('\r'); |
792ffc71 GM |
1066 | if (crmod) { |
1067 | TTYADD('\n'); | |
1068 | } | |
238f35b1 GM |
1069 | } |
1070 | } else { | |
1071 | state = TS_CR; | |
3e16c811 | 1072 | TTYADD('\r'); |
792ffc71 GM |
1073 | if (crmod) { |
1074 | TTYADD('\n'); | |
1075 | } | |
238f35b1 GM |
1076 | } |
1077 | } else { | |
3e16c811 | 1078 | TTYADD(c); |
238f35b1 | 1079 | } |
a19db822 BJ |
1080 | continue; |
1081 | ||
1082 | case TS_IAC: | |
1083 | switch (c) { | |
1084 | ||
1085 | case WILL: | |
1086 | state = TS_WILL; | |
1087 | continue; | |
1088 | ||
1089 | case WONT: | |
1090 | state = TS_WONT; | |
1091 | continue; | |
1092 | ||
1093 | case DO: | |
1094 | state = TS_DO; | |
1095 | continue; | |
1096 | ||
1097 | case DONT: | |
1098 | state = TS_DONT; | |
1099 | continue; | |
1100 | ||
1101 | case DM: | |
3e16c811 GM |
1102 | /* |
1103 | * We may have missed an urgent notification, | |
1104 | * so make sure we flush whatever is in the | |
1105 | * buffer currently. | |
1106 | */ | |
f2bf20fe | 1107 | SYNCHing = 1; |
3e16c811 | 1108 | ttyflush(); |
f2bf20fe | 1109 | SYNCHing = stilloob(net); |
040b6435 | 1110 | settimer(gotDM); |
a19db822 BJ |
1111 | break; |
1112 | ||
1113 | case NOP: | |
1114 | case GA: | |
1115 | break; | |
1116 | ||
0ea293c6 GM |
1117 | case SB: |
1118 | SB_CLEAR(); | |
1119 | state = TS_SB; | |
1120 | continue; | |
1121 | ||
a19db822 BJ |
1122 | default: |
1123 | break; | |
1124 | } | |
1125 | state = TS_DATA; | |
1126 | continue; | |
1127 | ||
1128 | case TS_WILL: | |
0ea293c6 | 1129 | printoption(">RCVD", will, c, !hisopts[c]); |
40e8c2a3 GM |
1130 | if (c == TELOPT_TM) { |
1131 | if (flushout) { | |
f2bf20fe | 1132 | flushout = 0; |
40e8c2a3 GM |
1133 | } |
1134 | } else if (!hisopts[c]) { | |
0ea293c6 | 1135 | willoption(c, 1); |
40e8c2a3 | 1136 | } |
a19db822 BJ |
1137 | state = TS_DATA; |
1138 | continue; | |
1139 | ||
1140 | case TS_WONT: | |
0ea293c6 | 1141 | printoption(">RCVD", wont, c, hisopts[c]); |
40e8c2a3 GM |
1142 | if (c == TELOPT_TM) { |
1143 | if (flushout) { | |
f2bf20fe | 1144 | flushout = 0; |
40e8c2a3 GM |
1145 | } |
1146 | } else if (hisopts[c]) { | |
0ea293c6 | 1147 | wontoption(c, 1); |
40e8c2a3 | 1148 | } |
a19db822 BJ |
1149 | state = TS_DATA; |
1150 | continue; | |
1151 | ||
1152 | case TS_DO: | |
0ea293c6 | 1153 | printoption(">RCVD", doopt, c, !myopts[c]); |
a19db822 BJ |
1154 | if (!myopts[c]) |
1155 | dooption(c); | |
1156 | state = TS_DATA; | |
1157 | continue; | |
1158 | ||
1159 | case TS_DONT: | |
0ea293c6 | 1160 | printoption(">RCVD", dont, c, myopts[c]); |
a19db822 BJ |
1161 | if (myopts[c]) { |
1162 | myopts[c] = 0; | |
1163 | sprintf(nfrontp, wont, c); | |
a50d5753 | 1164 | nfrontp += sizeof (wont) - 2; |
40e8c2a3 GM |
1165 | flushline = 1; |
1166 | setconnmode(); /* set new tty mode (maybe) */ | |
0ea293c6 | 1167 | printoption(">SENT", wont, c); |
a19db822 BJ |
1168 | } |
1169 | state = TS_DATA; | |
1170 | continue; | |
0ea293c6 GM |
1171 | case TS_SB: |
1172 | if (c == IAC) { | |
1173 | state = TS_SE; | |
1174 | } else { | |
1175 | SB_ACCUM(c); | |
1176 | } | |
1177 | continue; | |
1178 | ||
1179 | case TS_SE: | |
1180 | if (c != SE) { | |
1181 | if (c != IAC) { | |
1182 | SB_ACCUM(IAC); | |
1183 | } | |
1184 | SB_ACCUM(c); | |
1185 | state = TS_SB; | |
1186 | } else { | |
1187 | SB_TERM(); | |
1188 | suboption(); /* handle sub-option */ | |
1189 | state = TS_DATA; | |
1190 | } | |
a19db822 BJ |
1191 | } |
1192 | } | |
1193 | } | |
40e8c2a3 | 1194 | \f |
0ea293c6 GM |
1195 | willoption(option, reply) |
1196 | int option, reply; | |
a19db822 BJ |
1197 | { |
1198 | char *fmt; | |
1199 | ||
1200 | switch (option) { | |
1201 | ||
1202 | case TELOPT_ECHO: | |
a19db822 | 1203 | case TELOPT_SGA: |
40e8c2a3 | 1204 | settimer(modenegotiated); |
a19db822 BJ |
1205 | hisopts[option] = 1; |
1206 | fmt = doopt; | |
40e8c2a3 | 1207 | setconnmode(); /* possibly set new tty mode */ |
a19db822 BJ |
1208 | break; |
1209 | ||
1210 | case TELOPT_TM: | |
40e8c2a3 | 1211 | return; /* Never reply to TM will's/wont's */ |
a19db822 BJ |
1212 | |
1213 | default: | |
1214 | fmt = dont; | |
1215 | break; | |
1216 | } | |
de372207 | 1217 | sprintf(nfrontp, fmt, option); |
a50d5753 | 1218 | nfrontp += sizeof (dont) - 2; |
0ea293c6 GM |
1219 | if (reply) |
1220 | printoption(">SENT", fmt, option); | |
1221 | else | |
1222 | printoption("<SENT", fmt, option); | |
a19db822 BJ |
1223 | } |
1224 | ||
0ea293c6 GM |
1225 | wontoption(option, reply) |
1226 | int option, reply; | |
a19db822 BJ |
1227 | { |
1228 | char *fmt; | |
1229 | ||
1230 | switch (option) { | |
1231 | ||
1232 | case TELOPT_ECHO: | |
a19db822 | 1233 | case TELOPT_SGA: |
40e8c2a3 | 1234 | settimer(modenegotiated); |
a19db822 BJ |
1235 | hisopts[option] = 0; |
1236 | fmt = dont; | |
40e8c2a3 | 1237 | setconnmode(); /* Set new tty mode */ |
a19db822 BJ |
1238 | break; |
1239 | ||
40e8c2a3 GM |
1240 | case TELOPT_TM: |
1241 | return; /* Never reply to TM will's/wont's */ | |
1242 | ||
a19db822 BJ |
1243 | default: |
1244 | fmt = dont; | |
1245 | } | |
1246 | sprintf(nfrontp, fmt, option); | |
a50d5753 | 1247 | nfrontp += sizeof (doopt) - 2; |
0ea293c6 GM |
1248 | if (reply) |
1249 | printoption(">SENT", fmt, option); | |
1250 | else | |
1251 | printoption("<SENT", fmt, option); | |
a19db822 BJ |
1252 | } |
1253 | ||
1254 | dooption(option) | |
1255 | int option; | |
1256 | { | |
1257 | char *fmt; | |
1258 | ||
1259 | switch (option) { | |
1260 | ||
1261 | case TELOPT_TM: | |
680e328e | 1262 | fmt = will; |
680e328e | 1263 | break; |
a19db822 | 1264 | |
0ea293c6 | 1265 | case TELOPT_TTYPE: /* terminal type option */ |
40e8c2a3 | 1266 | case TELOPT_SGA: /* no big deal */ |
a19db822 | 1267 | fmt = will; |
40e8c2a3 | 1268 | myopts[option] = 1; |
a19db822 BJ |
1269 | break; |
1270 | ||
40e8c2a3 | 1271 | case TELOPT_ECHO: /* We're never going to echo... */ |
a19db822 BJ |
1272 | default: |
1273 | fmt = wont; | |
1274 | break; | |
1275 | } | |
1276 | sprintf(nfrontp, fmt, option); | |
a50d5753 | 1277 | nfrontp += sizeof (doopt) - 2; |
0ea293c6 GM |
1278 | printoption(">SENT", fmt, option); |
1279 | } | |
1280 | ||
1281 | /* | |
1282 | * suboption() | |
1283 | * | |
1284 | * Look at the sub-option buffer, and try to be helpful to the other | |
1285 | * side. | |
1286 | * | |
1287 | * Currently we recognize: | |
1288 | * | |
1289 | * Terminal type, send request. | |
1290 | */ | |
1291 | ||
1292 | suboption() | |
1293 | { | |
1294 | switch (subbuffer[0]&0xff) { | |
1295 | case TELOPT_TTYPE: | |
1296 | if ((subbuffer[1]&0xff) != TELQUAL_SEND) { | |
1297 | ; | |
1298 | } else { | |
1299 | char *name; | |
1300 | char namebuf[41]; | |
1301 | char *getenv(); | |
1302 | int len; | |
1303 | ||
1304 | name = getenv("TERM"); | |
1305 | if ((name == 0) || ((len = strlen(name)) > 40)) { | |
1306 | name = "UNKNOWN"; | |
1307 | } | |
1308 | if ((len + 4+2) < NETROOM()) { | |
1309 | strcpy(namebuf, name); | |
1310 | upcase(namebuf); | |
1311 | sprintf(nfrontp, "%c%c%c%c%s%c%c", IAC, SB, TELOPT_TTYPE, | |
1312 | TELQUAL_IS, namebuf, IAC, SE); | |
1313 | nfrontp += 4+strlen(namebuf)+2; | |
1314 | } | |
1315 | } | |
1316 | ||
1317 | default: | |
1318 | break; | |
1319 | } | |
a19db822 | 1320 | } |
40e8c2a3 | 1321 | \f |
3e16c811 GM |
1322 | /* |
1323 | * The following are data structures and routines for | |
1324 | * the "send" command. | |
1325 | * | |
1326 | */ | |
1327 | ||
1328 | struct sendlist { | |
1329 | char *name; /* How user refers to it (case independent) */ | |
1330 | int what; /* Character to be sent (<0 ==> special) */ | |
1331 | char *help; /* Help information (0 ==> no help) */ | |
1332 | int (*routine)(); /* Routine to perform (for special ops) */ | |
1333 | }; | |
1334 | ||
f2bf20fe | 1335 | /*ARGSUSED*/ |
3e16c811 GM |
1336 | dosynch(s) |
1337 | struct sendlist *s; | |
1338 | { | |
3087f2df | 1339 | netclear(); /* clear the path to the network */ |
3e16c811 | 1340 | NET2ADD(IAC, DM); |
f2bf20fe | 1341 | neturg = NETLOC()-1; /* Some systems are off by one XXX */ |
3e16c811 GM |
1342 | } |
1343 | ||
792ffc71 GM |
1344 | doflush() |
1345 | { | |
792ffc71 GM |
1346 | NET2ADD(IAC, DO); |
1347 | NETADD(TELOPT_TM); | |
792ffc71 GM |
1348 | flushline = 1; |
1349 | flushout = 1; | |
1350 | ttyflush(); | |
0ea293c6 GM |
1351 | /* do printoption AFTER flush, otherwise the output gets tossed... */ |
1352 | printoption("<SENT", doopt, TELOPT_TM); | |
792ffc71 GM |
1353 | } |
1354 | ||
3e16c811 GM |
1355 | intp() |
1356 | { | |
40e8c2a3 | 1357 | NET2ADD(IAC, IP); |
792ffc71 GM |
1358 | if (autoflush) { |
1359 | doflush(); | |
1360 | } | |
1361 | if (autosynch) { | |
1362 | dosynch(); | |
1363 | } | |
40e8c2a3 GM |
1364 | } |
1365 | ||
1366 | sendbrk() | |
1367 | { | |
f2bf20fe | 1368 | NET2ADD(IAC, BREAK); |
792ffc71 GM |
1369 | if (autoflush) { |
1370 | doflush(); | |
1371 | } | |
1372 | if (autosynch) { | |
1373 | dosynch(); | |
1374 | } | |
3e16c811 GM |
1375 | } |
1376 | ||
1377 | ||
1378 | #define SENDQUESTION -1 | |
3e16c811 GM |
1379 | #define SENDESCAPE -3 |
1380 | ||
1381 | struct sendlist Sendlist[] = { | |
3e16c811 | 1382 | { "ao", AO, "Send Telnet Abort output" }, |
3e16c811 | 1383 | { "ayt", AYT, "Send Telnet 'Are You There'" }, |
3087f2df | 1384 | { "brk", BREAK, "Send Telnet Break" }, |
3e16c811 GM |
1385 | { "ec", EC, "Send Telnet Erase Character" }, |
1386 | { "el", EL, "Send Telnet Erase Line" }, | |
3087f2df | 1387 | { "escape", SENDESCAPE, "Send current escape character" }, |
3e16c811 | 1388 | { "ga", GA, "Send Telnet 'Go Ahead' sequence" }, |
3087f2df | 1389 | { "ip", IP, "Send Telnet Interrupt Process" }, |
3e16c811 | 1390 | { "nop", NOP, "Send Telnet 'No operation'" }, |
3087f2df | 1391 | { "synch", SYNCH, "Perform Telnet 'Synch operation'", dosynch }, |
3e16c811 | 1392 | { "?", SENDQUESTION, "Display send options" }, |
3e16c811 GM |
1393 | { 0 } |
1394 | }; | |
1395 | ||
3087f2df GM |
1396 | struct sendlist Sendlist2[] = { /* some synonyms */ |
1397 | { "break", BREAK, 0 }, | |
1398 | ||
1399 | { "intp", IP, 0 }, | |
1400 | { "interrupt", IP, 0 }, | |
1401 | { "intr", IP, 0 }, | |
1402 | ||
1403 | { "help", SENDQUESTION, 0 }, | |
1404 | ||
1405 | { 0 } | |
1406 | }; | |
1407 | ||
3e16c811 GM |
1408 | char ** |
1409 | getnextsend(name) | |
1410 | char *name; | |
1411 | { | |
1412 | struct sendlist *c = (struct sendlist *) name; | |
1413 | ||
1414 | return (char **) (c+1); | |
1415 | } | |
1416 | ||
1417 | struct sendlist * | |
1418 | getsend(name) | |
1419 | char *name; | |
1420 | { | |
3087f2df GM |
1421 | struct sendlist *sl; |
1422 | ||
1423 | if (sl = (struct sendlist *) | |
1424 | genget(name, (char **) Sendlist, getnextsend)) { | |
1425 | return sl; | |
1426 | } else { | |
1427 | return (struct sendlist *) | |
1428 | genget(name, (char **) Sendlist2, getnextsend); | |
1429 | } | |
3e16c811 GM |
1430 | } |
1431 | ||
1432 | sendcmd(argc, argv) | |
1433 | int argc; | |
1434 | char **argv; | |
1435 | { | |
1436 | int what; /* what we are sending this time */ | |
1437 | int count; /* how many bytes we are going to need to send */ | |
1438 | int hadsynch; /* are we going to process a "synch"? */ | |
1439 | int i; | |
3087f2df | 1440 | int question = 0; /* was at least one argument a question */ |
3e16c811 GM |
1441 | struct sendlist *s; /* pointer to current command */ |
1442 | ||
1443 | if (argc < 2) { | |
1444 | printf("need at least one argument for 'send' command\n"); | |
1445 | printf("'send ?' for help\n"); | |
3087f2df | 1446 | return 0; |
3e16c811 GM |
1447 | } |
1448 | /* | |
1449 | * First, validate all the send arguments. | |
1450 | * In addition, we see how much space we are going to need, and | |
1451 | * whether or not we will be doing a "SYNCH" operation (which | |
1452 | * flushes the network queue). | |
1453 | */ | |
1454 | count = 0; | |
1455 | hadsynch = 0; | |
1456 | for (i = 1; i < argc; i++) { | |
1457 | s = getsend(argv[i]); | |
1458 | if (s == 0) { | |
1459 | printf("Unknown send argument '%s'\n'send ?' for help.\n", | |
1460 | argv[i]); | |
3087f2df | 1461 | return 0; |
f2bf20fe | 1462 | } else if (s == Ambiguous(struct sendlist *)) { |
3e16c811 GM |
1463 | printf("Ambiguous send argument '%s'\n'send ?' for help.\n", |
1464 | argv[i]); | |
3087f2df | 1465 | return 0; |
3e16c811 GM |
1466 | } |
1467 | switch (s->what) { | |
1468 | case SENDQUESTION: | |
3e16c811 GM |
1469 | break; |
1470 | case SENDESCAPE: | |
1471 | count += 1; | |
1472 | break; | |
1473 | case SYNCH: | |
1474 | hadsynch = 1; | |
1475 | count += 2; | |
1476 | break; | |
1477 | default: | |
1478 | count += 2; | |
1479 | break; | |
1480 | } | |
1481 | } | |
1482 | /* Now, do we have enough room? */ | |
792ffc71 | 1483 | if (NETROOM() < count) { |
3e16c811 GM |
1484 | printf("There is not enough room in the buffer TO the network\n"); |
1485 | printf("to process your request. Nothing will be done.\n"); | |
1486 | printf("('send synch' will throw away most data in the network\n"); | |
1487 | printf("buffer, if this might help.)\n"); | |
3087f2df | 1488 | return 0; |
3e16c811 GM |
1489 | } |
1490 | /* OK, they are all OK, now go through again and actually send */ | |
1491 | for (i = 1; i < argc; i++) { | |
1492 | if (!(s = getsend(argv[i]))) { | |
1493 | fprintf(stderr, "Telnet 'send' error - argument disappeared!\n"); | |
1494 | quit(); | |
1495 | /*NOTREACHED*/ | |
1496 | } | |
1497 | if (s->routine) { | |
1498 | (*s->routine)(s); | |
1499 | } else { | |
1500 | switch (what = s->what) { | |
3087f2df GM |
1501 | case SYNCH: |
1502 | dosynch(); | |
1503 | break; | |
3e16c811 | 1504 | case SENDQUESTION: |
3e16c811 | 1505 | for (s = Sendlist; s->name; s++) { |
3087f2df | 1506 | if (s->help) { |
3e16c811 GM |
1507 | printf(s->name); |
1508 | if (s->help) { | |
1509 | printf("\t%s", s->help); | |
1510 | } | |
1511 | printf("\n"); | |
1512 | } | |
1513 | } | |
3087f2df | 1514 | question = 1; |
3e16c811 GM |
1515 | break; |
1516 | case SENDESCAPE: | |
1517 | NETADD(escape); | |
1518 | break; | |
1519 | default: | |
1520 | NET2ADD(IAC, what); | |
1521 | break; | |
1522 | } | |
1523 | } | |
1524 | } | |
3087f2df | 1525 | return !question; |
3e16c811 GM |
1526 | } |
1527 | \f | |
1528 | /* | |
1529 | * The following are the routines and data structures referred | |
1530 | * to by the arguments to the "toggle" command. | |
1531 | */ | |
1532 | ||
3087f2df | 1533 | lclchars() |
40e8c2a3 | 1534 | { |
3087f2df GM |
1535 | donelclchars = 1; |
1536 | return 1; | |
40e8c2a3 GM |
1537 | } |
1538 | ||
040b6435 | 1539 | togdebug() |
3e16c811 | 1540 | { |
0ea293c6 | 1541 | #ifndef NOT43 |
40e8c2a3 | 1542 | if (net > 0 && |
f2bf20fe GM |
1543 | setsockopt(net, SOL_SOCKET, SO_DEBUG, (char *)&debug, sizeof(debug)) |
1544 | < 0) { | |
40e8c2a3 | 1545 | perror("setsockopt (SO_DEBUG)"); |
f2bf20fe | 1546 | } |
0ea293c6 GM |
1547 | #else NOT43 |
1548 | if (debug) { | |
1549 | if (net > 0 && setsockopt(net, SOL_SOCKET, SO_DEBUG, 0, 0) < 0) | |
1550 | perror("setsockopt (SO_DEBUG)"); | |
1551 | } else | |
1552 | printf("Cannot turn off socket debugging\n"); | |
1553 | #endif NOT43 | |
3087f2df | 1554 | return 1; |
3e16c811 GM |
1555 | } |
1556 | ||
3e16c811 | 1557 | |
3e16c811 GM |
1558 | |
1559 | int togglehelp(); | |
1560 | ||
040b6435 GM |
1561 | struct togglelist { |
1562 | char *name; /* name of toggle */ | |
1563 | char *help; /* help message */ | |
f2bf20fe | 1564 | int (*handler)(); /* routine to do actual setting */ |
040b6435 GM |
1565 | int dohelp; /* should we display help information */ |
1566 | int *variable; | |
1567 | char *actionexplanation; | |
1568 | }; | |
1569 | ||
1570 | struct togglelist Togglelist[] = { | |
3087f2df GM |
1571 | { "autoflush", |
1572 | "toggle flushing of output when sending interrupt characters", | |
f2bf20fe | 1573 | 0, |
040b6435 | 1574 | 1, |
3087f2df GM |
1575 | &autoflush, |
1576 | "flush output when sending interrupt characters" }, | |
f2bf20fe GM |
1577 | { "autosynch", |
1578 | "toggle automatic sending of interrupt characters in urgent mode", | |
1579 | 0, | |
1580 | 1, | |
1581 | &autosynch, | |
1582 | "send interrupt characters in urgent mode" }, | |
040b6435 | 1583 | { "crmod", |
3087f2df | 1584 | "toggle mapping of received carriage returns", |
f2bf20fe | 1585 | 0, |
040b6435 GM |
1586 | 1, |
1587 | &crmod, | |
1588 | "map carriage return on output" }, | |
3087f2df GM |
1589 | { "localchars", |
1590 | "toggle local recognition of certain control characters", | |
1591 | lclchars, | |
1592 | 1, | |
1593 | &localchars, | |
1594 | "recognize certain control characters" }, | |
40e8c2a3 | 1595 | { " ", "", 0, 1 }, /* empty line */ |
040b6435 GM |
1596 | { "debug", |
1597 | "(debugging) toggle debugging", | |
1598 | togdebug, | |
1599 | 1, | |
1600 | &debug, | |
1601 | "turn on socket level debugging" }, | |
040b6435 GM |
1602 | { "netdata", |
1603 | "(debugging) toggle printing of hexadecimal network data", | |
f2bf20fe | 1604 | 0, |
040b6435 GM |
1605 | 1, |
1606 | &netdata, | |
1607 | "print hexadecimal representation of network traffic" }, | |
3087f2df GM |
1608 | { "options", |
1609 | "(debugging) toggle viewing of options processing", | |
1610 | 0, | |
1611 | 1, | |
1612 | &showoptions, | |
1613 | "show option processing" }, | |
1614 | { " ", "", 0, 1 }, /* empty line */ | |
040b6435 GM |
1615 | { "?", |
1616 | "display help information", | |
1617 | togglehelp, | |
1618 | 1 }, | |
1619 | { "help", | |
1620 | "display help information", | |
1621 | togglehelp, | |
1622 | 0 }, | |
3e16c811 GM |
1623 | { 0 } |
1624 | }; | |
1625 | ||
1626 | togglehelp() | |
1627 | { | |
040b6435 | 1628 | struct togglelist *c; |
3e16c811 | 1629 | |
040b6435 | 1630 | for (c = Togglelist; c->name; c++) { |
3e16c811 GM |
1631 | if (c->dohelp) { |
1632 | printf("%s\t%s\n", c->name, c->help); | |
1633 | } | |
1634 | } | |
3087f2df | 1635 | return 0; |
3e16c811 GM |
1636 | } |
1637 | ||
1638 | char ** | |
1639 | getnexttoggle(name) | |
1640 | char *name; | |
1641 | { | |
040b6435 | 1642 | struct togglelist *c = (struct togglelist *) name; |
3e16c811 GM |
1643 | |
1644 | return (char **) (c+1); | |
1645 | } | |
1646 | ||
040b6435 | 1647 | struct togglelist * |
3e16c811 GM |
1648 | gettoggle(name) |
1649 | char *name; | |
1650 | { | |
040b6435 GM |
1651 | return (struct togglelist *) |
1652 | genget(name, (char **) Togglelist, getnexttoggle); | |
3e16c811 GM |
1653 | } |
1654 | ||
1655 | toggle(argc, argv) | |
1656 | int argc; | |
1657 | char *argv[]; | |
1658 | { | |
3087f2df | 1659 | int retval = 1; |
3e16c811 | 1660 | char *name; |
040b6435 | 1661 | struct togglelist *c; |
3e16c811 GM |
1662 | |
1663 | if (argc < 2) { | |
1664 | fprintf(stderr, | |
1665 | "Need an argument to 'toggle' command. 'toggle ?' for help.\n"); | |
3087f2df | 1666 | return 0; |
3e16c811 GM |
1667 | } |
1668 | argc--; | |
1669 | argv++; | |
1670 | while (argc--) { | |
1671 | name = *argv++; | |
1672 | c = gettoggle(name); | |
f2bf20fe | 1673 | if (c == Ambiguous(struct togglelist *)) { |
3e16c811 GM |
1674 | fprintf(stderr, "'%s': ambiguous argument ('toggle ?' for help).\n", |
1675 | name); | |
3087f2df | 1676 | return 0; |
3e16c811 GM |
1677 | } else if (c == 0) { |
1678 | fprintf(stderr, "'%s': unknown argument ('toggle ?' for help).\n", | |
1679 | name); | |
3087f2df | 1680 | return 0; |
3e16c811 | 1681 | } else { |
f2bf20fe GM |
1682 | if (c->variable) { |
1683 | *c->variable = !*c->variable; /* invert it */ | |
1684 | printf("%s %s.\n", *c->variable? "Will" : "Won't", | |
1685 | c->actionexplanation); | |
1686 | } | |
1687 | if (c->handler) { | |
3087f2df | 1688 | retval &= (*c->handler)(c); |
f2bf20fe | 1689 | } |
3e16c811 GM |
1690 | } |
1691 | } | |
3087f2df | 1692 | return retval; |
3e16c811 GM |
1693 | } |
1694 | \f | |
40e8c2a3 GM |
1695 | /* |
1696 | * The following perform the "set" command. | |
1697 | */ | |
1698 | ||
040b6435 GM |
1699 | struct setlist { |
1700 | char *name; /* name */ | |
40e8c2a3 GM |
1701 | char *help; /* help information */ |
1702 | char *charp; /* where it is located at */ | |
1703 | }; | |
1704 | ||
040b6435 | 1705 | struct setlist Setlist[] = { |
40e8c2a3 GM |
1706 | { "echo", "character to toggle local echoing on/off", &echoc }, |
1707 | { "escape", "character to escape back to telnet command mode", &escape }, | |
3087f2df GM |
1708 | { " ", "" }, |
1709 | { " ", "The following need 'localchars' to be toggled true", 0 }, | |
40e8c2a3 | 1710 | { "erase", "character to cause an Erase Character", &nttyb.sg_erase }, |
3087f2df GM |
1711 | { "flushoutput", "character to cause an Abort Oubput", &nltc.t_flushc }, |
1712 | { "interrupt", "character to cause an Interrupt Process", &ntc.t_intrc }, | |
40e8c2a3 | 1713 | { "kill", "character to cause an Erase Line", &nttyb.sg_kill }, |
3087f2df | 1714 | { "quit", "character to cause a Break", &ntc.t_quitc }, |
0ea293c6 | 1715 | { "eof", "character to cause an EOF ", &ntc.t_eofc }, |
40e8c2a3 GM |
1716 | { 0 } |
1717 | }; | |
1718 | ||
1719 | char ** | |
040b6435 | 1720 | getnextset(name) |
40e8c2a3 GM |
1721 | char *name; |
1722 | { | |
040b6435 | 1723 | struct setlist *c = (struct setlist *)name; |
40e8c2a3 GM |
1724 | |
1725 | return (char **) (c+1); | |
1726 | } | |
1727 | ||
040b6435 GM |
1728 | struct setlist * |
1729 | getset(name) | |
40e8c2a3 GM |
1730 | char *name; |
1731 | { | |
040b6435 | 1732 | return (struct setlist *) genget(name, (char **) Setlist, getnextset); |
40e8c2a3 GM |
1733 | } |
1734 | ||
1735 | setcmd(argc, argv) | |
1736 | int argc; | |
1737 | char *argv[]; | |
1738 | { | |
1739 | int value; | |
040b6435 | 1740 | struct setlist *ct; |
40e8c2a3 GM |
1741 | |
1742 | /* XXX back we go... sigh */ | |
1743 | if (argc != 3) { | |
3087f2df GM |
1744 | if ((argc == 2) && |
1745 | ((!strcmp(argv[1], "?")) || (!strcmp(argv[1], "help")))) { | |
1746 | for (ct = Setlist; ct->name; ct++) { | |
1747 | printf("%s\t%s\n", ct->name, ct->help); | |
1748 | } | |
1749 | printf("?\tdisplay help information\n"); | |
1750 | } else { | |
1751 | printf("Format is 'set Name Value'\n'set ?' for help.\n"); | |
40e8c2a3 | 1752 | } |
3087f2df | 1753 | return 0; |
40e8c2a3 GM |
1754 | } |
1755 | ||
040b6435 | 1756 | ct = getset(argv[1]); |
40e8c2a3 GM |
1757 | if (ct == 0) { |
1758 | fprintf(stderr, "'%s': unknown argument ('set ?' for help).\n", | |
1759 | argv[1]); | |
3087f2df | 1760 | return 0; |
f2bf20fe | 1761 | } else if (ct == Ambiguous(struct setlist *)) { |
40e8c2a3 GM |
1762 | fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n", |
1763 | argv[1]); | |
3087f2df | 1764 | return 0; |
40e8c2a3 GM |
1765 | } else { |
1766 | if (strcmp("off", argv[2])) { | |
1767 | value = special(argv[2]); | |
1768 | } else { | |
1769 | value = -1; | |
1770 | } | |
1771 | *(ct->charp) = value; | |
040b6435 | 1772 | printf("%s character is '%s'.\n", ct->name, control(*(ct->charp))); |
40e8c2a3 | 1773 | } |
3087f2df | 1774 | return 1; |
40e8c2a3 GM |
1775 | } |
1776 | \f | |
1777 | /* | |
1778 | * The following are the data structures and routines for the | |
1779 | * 'mode' command. | |
1780 | */ | |
1781 | ||
1782 | dolinemode() | |
1783 | { | |
1784 | if (hisopts[TELOPT_SGA]) { | |
0ea293c6 | 1785 | wontoption(TELOPT_SGA, 0); |
40e8c2a3 GM |
1786 | } |
1787 | if (hisopts[TELOPT_ECHO]) { | |
0ea293c6 | 1788 | wontoption(TELOPT_ECHO, 0); |
40e8c2a3 GM |
1789 | } |
1790 | } | |
1791 | ||
1792 | docharmode() | |
1793 | { | |
1794 | if (!hisopts[TELOPT_SGA]) { | |
0ea293c6 | 1795 | willoption(TELOPT_SGA, 0); |
40e8c2a3 GM |
1796 | } |
1797 | if (!hisopts[TELOPT_ECHO]) { | |
0ea293c6 | 1798 | willoption(TELOPT_ECHO, 0); |
40e8c2a3 GM |
1799 | } |
1800 | } | |
1801 | ||
1802 | struct cmd Modelist[] = { | |
40e8c2a3 | 1803 | { "character", "character-at-a-time mode", docharmode, 1, 1 }, |
3087f2df | 1804 | { "line", "line-by-line mode", dolinemode, 1, 1 }, |
40e8c2a3 GM |
1805 | { 0 }, |
1806 | }; | |
1807 | ||
1808 | char ** | |
1809 | getnextmode(name) | |
1810 | char *name; | |
1811 | { | |
1812 | struct cmd *c = (struct cmd *) name; | |
1813 | ||
1814 | return (char **) (c+1); | |
1815 | } | |
1816 | ||
1817 | struct cmd * | |
1818 | getmodecmd(name) | |
1819 | char *name; | |
1820 | { | |
1821 | return (struct cmd *) genget(name, (char **) Modelist, getnextmode); | |
1822 | } | |
1823 | ||
1824 | modecmd(argc, argv) | |
1825 | int argc; | |
1826 | char *argv[]; | |
1827 | { | |
1828 | struct cmd *mt; | |
1829 | ||
1830 | if ((argc != 2) || !strcmp(argv[1], "?") || !strcmp(argv[1], "help")) { | |
1831 | printf("format is: 'mode Mode', where 'Mode' is one of:\n\n"); | |
1832 | for (mt = Modelist; mt->name; mt++) { | |
1833 | printf("%s\t%s\n", mt->name, mt->help); | |
1834 | } | |
3087f2df | 1835 | return 0; |
40e8c2a3 GM |
1836 | } |
1837 | mt = getmodecmd(argv[1]); | |
1838 | if (mt == 0) { | |
1839 | fprintf(stderr, "Unknown mode '%s' ('mode ?' for help).\n", argv[1]); | |
3087f2df | 1840 | return 0; |
f2bf20fe | 1841 | } else if (mt == Ambiguous(struct cmd *)) { |
40e8c2a3 | 1842 | fprintf(stderr, "Ambiguous mode '%s' ('mode ?' for help).\n", argv[1]); |
3087f2df | 1843 | return 0; |
40e8c2a3 GM |
1844 | } else { |
1845 | (*mt->handler)(); | |
1846 | } | |
3087f2df | 1847 | return 1; |
40e8c2a3 GM |
1848 | } |
1849 | \f | |
040b6435 GM |
1850 | /* |
1851 | * The following data structures and routines implement the | |
1852 | * "display" command. | |
1853 | */ | |
1854 | ||
1855 | display(argc, argv) | |
1856 | int argc; | |
1857 | char *argv[]; | |
1858 | { | |
1859 | #define dotog(tl) if (tl->variable && tl->actionexplanation) { \ | |
1860 | if (*tl->variable) { \ | |
1861 | printf("will"); \ | |
1862 | } else { \ | |
1863 | printf("won't"); \ | |
1864 | } \ | |
1865 | printf(" %s.\n", tl->actionexplanation); \ | |
1866 | } | |
1867 | ||
3087f2df GM |
1868 | #define doset(sl) if (sl->name && *sl->name != ' ') { \ |
1869 | printf("[%s]\t%s.\n", control(*sl->charp), sl->name); \ | |
1870 | } | |
040b6435 GM |
1871 | |
1872 | struct togglelist *tl; | |
1873 | struct setlist *sl; | |
1874 | ||
1875 | if (argc == 1) { | |
1876 | for (tl = Togglelist; tl->name; tl++) { | |
1877 | dotog(tl); | |
1878 | } | |
3087f2df | 1879 | printf("\n"); |
040b6435 GM |
1880 | for (sl = Setlist; sl->name; sl++) { |
1881 | doset(sl); | |
1882 | } | |
1883 | } else { | |
1884 | int i; | |
1885 | ||
1886 | for (i = 1; i < argc; i++) { | |
1887 | sl = getset(argv[i]); | |
1888 | tl = gettoggle(argv[i]); | |
f2bf20fe GM |
1889 | if ((sl == Ambiguous(struct setlist *)) || |
1890 | (tl == Ambiguous(struct togglelist *))) { | |
040b6435 | 1891 | printf("?Ambiguous argument '%s'.\n", argv[i]); |
3087f2df | 1892 | return 0; |
040b6435 GM |
1893 | } else if (!sl && !tl) { |
1894 | printf("?Unknown argument '%s'.\n", argv[i]); | |
3087f2df | 1895 | return 0; |
040b6435 | 1896 | } else { |
f2bf20fe GM |
1897 | if (tl) { |
1898 | dotog(tl); | |
1899 | } | |
1900 | if (sl) { | |
1901 | doset(sl); | |
1902 | } | |
040b6435 GM |
1903 | } |
1904 | } | |
1905 | } | |
3087f2df | 1906 | return 1; |
040b6435 GM |
1907 | #undef doset(sl) |
1908 | #undef dotog(tl) | |
1909 | } | |
1910 | \f | |
3e16c811 GM |
1911 | /* |
1912 | * The following are the data structures, and many of the routines, | |
1913 | * relating to command processing. | |
1914 | */ | |
1915 | ||
1916 | /* | |
1917 | * Set the escape character. | |
1918 | */ | |
1919 | setescape(argc, argv) | |
1920 | int argc; | |
1921 | char *argv[]; | |
1922 | { | |
1923 | register char *arg; | |
1924 | char buf[50]; | |
1925 | ||
f2bf20fe GM |
1926 | printf( |
1927 | "Deprecated usage - please use 'set escape%s%s' in the future.\n", | |
1928 | (argc > 2)? " ":"", (argc > 2)? argv[1]: ""); | |
3e16c811 GM |
1929 | if (argc > 2) |
1930 | arg = argv[1]; | |
1931 | else { | |
1932 | printf("new escape character: "); | |
1933 | gets(buf); | |
1934 | arg = buf; | |
1935 | } | |
1936 | if (arg[0] != '\0') | |
1937 | escape = arg[0]; | |
1938 | printf("Escape character is '%s'.\n", control(escape)); | |
1939 | fflush(stdout); | |
3087f2df GM |
1940 | return 1; |
1941 | } | |
1942 | ||
1943 | /*VARARGS*/ | |
1944 | togcrmod() | |
1945 | { | |
1946 | crmod = !crmod; | |
1947 | printf("Deprecated usage - please use 'toggle crmod' in the future.\n"); | |
1948 | printf("%s map carriage return on output.\n", crmod ? "Will" : "Won't"); | |
1949 | fflush(stdout); | |
1950 | return 1; | |
3e16c811 GM |
1951 | } |
1952 | ||
3e16c811 GM |
1953 | /*VARARGS*/ |
1954 | suspend() | |
1955 | { | |
40e8c2a3 | 1956 | setcommandmode(); |
3e16c811 GM |
1957 | kill(0, SIGTSTP); |
1958 | /* reget parameters in case they were changed */ | |
1959 | ioctl(0, TIOCGETP, (char *)&ottyb); | |
1960 | ioctl(0, TIOCGETC, (char *)&otc); | |
1961 | ioctl(0, TIOCGLTC, (char *)&oltc); | |
3087f2df | 1962 | return 1; |
3e16c811 GM |
1963 | } |
1964 | ||
1965 | /*VARARGS*/ | |
1966 | bye() | |
1967 | { | |
1968 | register char *op; | |
1969 | ||
3e16c811 GM |
1970 | if (connected) { |
1971 | shutdown(net, 2); | |
1972 | printf("Connection closed.\n"); | |
1973 | close(net); | |
1974 | connected = 0; | |
1975 | /* reset his options */ | |
1976 | for (op = hisopts; op < &hisopts[256]; op++) | |
1977 | *op = 0; | |
1978 | } | |
3087f2df | 1979 | return 1; |
3e16c811 GM |
1980 | } |
1981 | ||
1982 | /*VARARGS*/ | |
1983 | quit() | |
1984 | { | |
3087f2df | 1985 | (void) call(bye, "bye", 0); |
3e16c811 | 1986 | exit(0); |
3087f2df | 1987 | /*NOTREACHED*/ |
3e16c811 GM |
1988 | } |
1989 | ||
1990 | /* | |
1991 | * Print status about the connection. | |
1992 | */ | |
f2bf20fe | 1993 | /*ARGSUSED*/ |
040b6435 GM |
1994 | status(argc, argv) |
1995 | int argc; | |
1996 | char *argv[]; | |
3e16c811 | 1997 | { |
040b6435 GM |
1998 | if (connected) { |
1999 | printf("Connected to %s.\n", hostname); | |
2000 | if (argc < 2) { | |
2001 | printf("Operating in %s.\n", modedescriptions[getconnmode()]); | |
3087f2df | 2002 | if (localchars) { |
040b6435 GM |
2003 | printf("Catching signals locally.\n"); |
2004 | } | |
40e8c2a3 | 2005 | } |
040b6435 GM |
2006 | } else { |
2007 | printf("No connection.\n"); | |
2008 | } | |
2009 | printf("Escape character is '%s'.\n", control(escape)); | |
2010 | fflush(stdout); | |
3087f2df | 2011 | return 1; |
3e16c811 GM |
2012 | } |
2013 | ||
2014 | tn(argc, argv) | |
2015 | int argc; | |
2016 | char *argv[]; | |
2017 | { | |
3e16c811 GM |
2018 | register struct hostent *host = 0; |
2019 | ||
2020 | if (connected) { | |
2021 | printf("?Already connected to %s\n", hostname); | |
3087f2df | 2022 | return 0; |
3e16c811 GM |
2023 | } |
2024 | if (argc < 2) { | |
f2bf20fe | 2025 | (void) strcpy(line, "Connect "); |
3e16c811 GM |
2026 | printf("(to) "); |
2027 | gets(&line[strlen(line)]); | |
2028 | makeargv(); | |
2029 | argc = margc; | |
2030 | argv = margv; | |
2031 | } | |
5a9a3084 | 2032 | if ((argc < 2) || (argc > 3)) { |
3e16c811 | 2033 | printf("usage: %s host-name [port]\n", argv[0]); |
3087f2df | 2034 | return 0; |
3e16c811 GM |
2035 | } |
2036 | sin.sin_addr.s_addr = inet_addr(argv[1]); | |
2037 | if (sin.sin_addr.s_addr != -1) { | |
2038 | sin.sin_family = AF_INET; | |
f2bf20fe | 2039 | (void) strcpy(hnamebuf, argv[1]); |
3e16c811 GM |
2040 | hostname = hnamebuf; |
2041 | } else { | |
2042 | host = gethostbyname(argv[1]); | |
2043 | if (host) { | |
2044 | sin.sin_family = host->h_addrtype; | |
0ea293c6 | 2045 | #ifndef NOT43 |
3e16c811 GM |
2046 | bcopy(host->h_addr_list[0], (caddr_t)&sin.sin_addr, |
2047 | host->h_length); | |
0ea293c6 GM |
2048 | #else NOT43 |
2049 | bcopy(host->h_addr, (caddr_t)&sin.sin_addr, | |
2050 | host->h_length); | |
2051 | #endif NOT43 | |
3e16c811 GM |
2052 | hostname = host->h_name; |
2053 | } else { | |
2054 | printf("%s: unknown host\n", argv[1]); | |
3087f2df | 2055 | return 0; |
3e16c811 GM |
2056 | } |
2057 | } | |
2058 | sin.sin_port = sp->s_port; | |
2059 | if (argc == 3) { | |
2060 | sin.sin_port = atoi(argv[2]); | |
f2bf20fe | 2061 | if (sin.sin_port == 0) { |
3e16c811 GM |
2062 | sp = getservbyname(argv[2], "tcp"); |
2063 | if (sp) | |
2064 | sin.sin_port = sp->s_port; | |
2065 | else { | |
2066 | printf("%s: bad port number\n", argv[2]); | |
3087f2df | 2067 | return 0; |
3e16c811 GM |
2068 | } |
2069 | } else { | |
2070 | sin.sin_port = atoi(argv[2]); | |
2071 | sin.sin_port = htons(sin.sin_port); | |
2072 | } | |
2073 | telnetport = 0; | |
40e8c2a3 GM |
2074 | } else { |
2075 | telnetport = 1; | |
3e16c811 GM |
2076 | } |
2077 | signal(SIGINT, intr); | |
40e8c2a3 | 2078 | signal(SIGQUIT, intr2); |
3e16c811 GM |
2079 | signal(SIGPIPE, deadpeer); |
2080 | printf("Trying...\n"); | |
2081 | do { | |
2082 | net = socket(AF_INET, SOCK_STREAM, 0); | |
2083 | if (net < 0) { | |
2084 | perror("telnet: socket"); | |
3087f2df | 2085 | return 0; |
3e16c811 | 2086 | } |
0ea293c6 | 2087 | #ifndef NOT43 |
f2bf20fe GM |
2088 | if (debug && |
2089 | setsockopt(net, SOL_SOCKET, SO_DEBUG, | |
0ea293c6 GM |
2090 | (char *)&debug, sizeof(debug)) < 0) |
2091 | #else NOT43 | |
2092 | if (debug && setsockopt(net, SOL_SOCKET, SO_DEBUG, 0, 0) < 0) | |
2093 | #endif NOT43 | |
3e16c811 | 2094 | perror("setsockopt (SO_DEBUG)"); |
0ea293c6 | 2095 | |
f2bf20fe | 2096 | if (connect(net, (struct sockaddr *)&sin, sizeof (sin)) < 0) { |
0ea293c6 | 2097 | #ifndef NOT43 |
3e16c811 GM |
2098 | if (host && host->h_addr_list[1]) { |
2099 | int oerrno = errno; | |
2100 | ||
2101 | fprintf(stderr, | |
2102 | "telnet: connect to address %s: ", | |
2103 | inet_ntoa(sin.sin_addr)); | |
2104 | errno = oerrno; | |
f2bf20fe | 2105 | perror((char *)0); |
3e16c811 GM |
2106 | host->h_addr_list++; |
2107 | bcopy(host->h_addr_list[0], | |
2108 | (caddr_t)&sin.sin_addr, host->h_length); | |
2109 | fprintf(stderr, "Trying %s...\n", | |
2110 | inet_ntoa(sin.sin_addr)); | |
2111 | (void) close(net); | |
2112 | continue; | |
2113 | } | |
0ea293c6 | 2114 | #endif NOT43 |
3e16c811 GM |
2115 | perror("telnet: connect"); |
2116 | signal(SIGINT, SIG_DFL); | |
3087f2df GM |
2117 | signal(SIGQUIT, SIG_DFL); |
2118 | return 0; | |
3e16c811 GM |
2119 | } |
2120 | connected++; | |
2121 | } while (connected == 0); | |
040b6435 | 2122 | call(status, "status", "notmuch", 0); |
3e16c811 GM |
2123 | if (setjmp(peerdied) == 0) |
2124 | telnet(); | |
2125 | fprintf(stderr, "Connection closed by foreign host.\n"); | |
2126 | exit(1); | |
3087f2df | 2127 | /*NOTREACHED*/ |
3e16c811 GM |
2128 | } |
2129 | ||
2130 | ||
2131 | #define HELPINDENT (sizeof ("connect")) | |
2132 | ||
2133 | char openhelp[] = "connect to a site"; | |
2134 | char closehelp[] = "close current connection"; | |
2135 | char quithelp[] = "exit telnet"; | |
2136 | char zhelp[] = "suspend telnet"; | |
3e16c811 GM |
2137 | char statushelp[] = "print status information"; |
2138 | char helphelp[] = "print help information"; | |
40e8c2a3 | 2139 | char sendhelp[] = "transmit special characters ('send ?' for more)"; |
040b6435 GM |
2140 | char sethelp[] = "set operating parameters ('set ?' for more)"; |
2141 | char togglestring[] ="toggle operating parameters ('toggle ?' for more)"; | |
2142 | char displayhelp[] = "display operating parameters"; | |
2143 | char modehelp[] = | |
2144 | "try to enter line-by-line or character-at-a-time mode"; | |
3e16c811 GM |
2145 | |
2146 | int help(); | |
2147 | ||
2148 | struct cmd cmdtab[] = { | |
40e8c2a3 | 2149 | { "close", closehelp, bye, 1, 1 }, |
3087f2df GM |
2150 | { "display", displayhelp, display, 1, 0 }, |
2151 | { "mode", modehelp, modecmd, 1, 1 }, | |
2152 | { "open", openhelp, tn, 1, 0 }, | |
40e8c2a3 | 2153 | { "quit", quithelp, quit, 1, 0 }, |
40e8c2a3 | 2154 | { "send", sendhelp, sendcmd, 1, 1 }, |
040b6435 | 2155 | { "set", sethelp, setcmd, 1, 0 }, |
3087f2df | 2156 | { "status", statushelp, status, 1, 0 }, |
40e8c2a3 | 2157 | { "toggle", togglestring, toggle, 1, 0 }, |
3087f2df | 2158 | { "z", zhelp, suspend, 1, 0 }, |
40e8c2a3 | 2159 | { "?", helphelp, help, 1, 0 }, |
3e16c811 GM |
2160 | 0 |
2161 | }; | |
2162 | ||
3087f2df GM |
2163 | char crmodhelp[] = "deprecated command -- use 'toggle crmod' instead"; |
2164 | char escapehelp[] = "deprecated command -- use 'set escape' instead"; | |
2165 | ||
2166 | struct cmd cmdtab2[] = { | |
2167 | { "help", helphelp, help, 0, 0 }, | |
2168 | { "escape", escapehelp, setescape, 1, 0 }, | |
2169 | { "crmod", crmodhelp, togcrmod, 1, 0 }, | |
2170 | 0 | |
2171 | }; | |
3e16c811 GM |
2172 | |
2173 | /* | |
2174 | * Help command. | |
2175 | */ | |
2176 | help(argc, argv) | |
2177 | int argc; | |
2178 | char *argv[]; | |
2179 | { | |
2180 | register struct cmd *c; | |
2181 | ||
2182 | if (argc == 1) { | |
2183 | printf("Commands may be abbreviated. Commands are:\n\n"); | |
2184 | for (c = cmdtab; c->name; c++) | |
2185 | if (c->dohelp) { | |
2186 | printf("%-*s\t%s\n", HELPINDENT, c->name, | |
2187 | c->help); | |
2188 | } | |
3087f2df | 2189 | return 0; |
3e16c811 GM |
2190 | } |
2191 | while (--argc > 0) { | |
2192 | register char *arg; | |
2193 | arg = *++argv; | |
2194 | c = getcmd(arg); | |
f2bf20fe | 2195 | if (c == Ambiguous(struct cmd *)) |
3e16c811 GM |
2196 | printf("?Ambiguous help command %s\n", arg); |
2197 | else if (c == (struct cmd *)0) | |
2198 | printf("?Invalid help command %s\n", arg); | |
2199 | else | |
2200 | printf("%s\n", c->help); | |
2201 | } | |
3087f2df | 2202 | return 0; |
3e16c811 GM |
2203 | } |
2204 | /* | |
2205 | * Call routine with argc, argv set from args (terminated by 0). | |
2206 | * VARARGS2 | |
2207 | */ | |
2208 | call(routine, args) | |
2209 | int (*routine)(); | |
f2bf20fe | 2210 | char *args; |
3e16c811 | 2211 | { |
f2bf20fe | 2212 | register char **argp; |
3e16c811 GM |
2213 | register int argc; |
2214 | ||
2215 | for (argc = 0, argp = &args; *argp++ != 0; argc++) | |
2216 | ; | |
3087f2df | 2217 | return (*routine)(argc, &args); |
3e16c811 GM |
2218 | } |
2219 | ||
2220 | makeargv() | |
2221 | { | |
2222 | register char *cp; | |
2223 | register char **argp = margv; | |
2224 | ||
2225 | margc = 0; | |
2226 | for (cp = line; *cp;) { | |
2227 | while (isspace(*cp)) | |
2228 | cp++; | |
2229 | if (*cp == '\0') | |
2230 | break; | |
2231 | *argp++ = cp; | |
2232 | margc += 1; | |
2233 | while (*cp != '\0' && !isspace(*cp)) | |
2234 | cp++; | |
2235 | if (*cp == '\0') | |
2236 | break; | |
2237 | *cp++ = '\0'; | |
2238 | } | |
2239 | *argp++ = 0; | |
2240 | } | |
2241 | ||
2242 | char ** | |
2243 | getnextcmd(name) | |
2244 | char *name; | |
2245 | { | |
2246 | struct cmd *c = (struct cmd *) name; | |
2247 | ||
2248 | return (char **) (c+1); | |
2249 | } | |
2250 | ||
2251 | struct cmd * | |
2252 | getcmd(name) | |
2253 | char *name; | |
2254 | { | |
3087f2df GM |
2255 | struct cmd *cm; |
2256 | ||
2257 | if (cm = (struct cmd *) genget(name, (char **) cmdtab, getnextcmd)) { | |
2258 | return cm; | |
2259 | } else { | |
2260 | return (struct cmd *) genget(name, (char **) cmdtab2, getnextcmd); | |
2261 | } | |
3e16c811 GM |
2262 | } |
2263 | ||
2264 | command(top) | |
2265 | int top; | |
2266 | { | |
2267 | register struct cmd *c; | |
3e16c811 | 2268 | |
40e8c2a3 | 2269 | setcommandmode(); |
3087f2df | 2270 | if (!top) { |
3e16c811 | 2271 | putchar('\n'); |
3087f2df | 2272 | } else { |
3e16c811 | 2273 | signal(SIGINT, SIG_DFL); |
3087f2df GM |
2274 | signal(SIGQUIT, SIG_DFL); |
2275 | } | |
3e16c811 GM |
2276 | for (;;) { |
2277 | printf("%s> ", prompt); | |
2278 | if (gets(line) == 0) { | |
2279 | if (feof(stdin)) | |
2280 | quit(); | |
2281 | break; | |
2282 | } | |
2283 | if (line[0] == 0) | |
2284 | break; | |
2285 | makeargv(); | |
2286 | c = getcmd(margv[0]); | |
f2bf20fe | 2287 | if (c == Ambiguous(struct cmd *)) { |
3e16c811 GM |
2288 | printf("?Ambiguous command\n"); |
2289 | continue; | |
2290 | } | |
2291 | if (c == 0) { | |
2292 | printf("?Invalid command\n"); | |
2293 | continue; | |
2294 | } | |
2295 | if (c->needconnect && !connected) { | |
2296 | printf("?Need to be connected first.\n"); | |
2297 | continue; | |
2298 | } | |
3087f2df | 2299 | if ((*c->handler)(margc, margv)) { |
3e16c811 | 2300 | break; |
3087f2df | 2301 | } |
3e16c811 GM |
2302 | } |
2303 | if (!top) { | |
40e8c2a3 | 2304 | if (!connected) { |
3e16c811 | 2305 | longjmp(toplevel, 1); |
40e8c2a3 GM |
2306 | /*NOTREACHED*/ |
2307 | } | |
2308 | setconnmode(); | |
3e16c811 GM |
2309 | } |
2310 | } | |
f2bf20fe GM |
2311 | \f |
2312 | /* | |
2313 | * main. Parse arguments, invoke the protocol or command parser. | |
2314 | */ | |
2315 | ||
2316 | ||
2317 | main(argc, argv) | |
2318 | int argc; | |
2319 | char *argv[]; | |
2320 | { | |
2321 | sp = getservbyname("telnet", "tcp"); | |
2322 | if (sp == 0) { | |
2323 | fprintf(stderr, "telnet: tcp/telnet: unknown service\n"); | |
2324 | exit(1); | |
2325 | } | |
2326 | NetTrace = stdout; | |
2327 | ioctl(0, TIOCGETP, (char *)&ottyb); | |
2328 | ioctl(0, TIOCGETC, (char *)&otc); | |
2329 | ioctl(0, TIOCGLTC, (char *)&oltc); | |
792ffc71 GM |
2330 | #if defined(LNOFLSH) |
2331 | ioctl(0, TIOCLGET, (char *)&autoflush); | |
3087f2df GM |
2332 | autoflush = !(autoflush&LNOFLSH); /* if LNOFLSH, no autoflush */ |
2333 | #else /* LNOFLSH */ | |
2334 | autoflush = 1; | |
792ffc71 | 2335 | #endif /* LNOFLSH */ |
f2bf20fe | 2336 | ntc = otc; |
792ffc71 | 2337 | nltc = oltc; |
f2bf20fe GM |
2338 | nttyb = ottyb; |
2339 | setbuf(stdin, (char *)0); | |
2340 | setbuf(stdout, (char *)0); | |
2341 | prompt = argv[0]; | |
2342 | if (argc > 1 && !strcmp(argv[1], "-d")) { | |
2343 | debug = 1; | |
2344 | argv++; | |
2345 | argc--; | |
2346 | } | |
2347 | if (argc > 1 && !strcmp(argv[1], "-n")) { | |
2348 | argv++; | |
2349 | argc--; | |
2350 | if (argc > 1) { /* get file name */ | |
2351 | NetTrace = fopen(argv[1], "w"); | |
2352 | argv++; | |
2353 | argc--; | |
2354 | if (NetTrace == NULL) { | |
2355 | NetTrace = stdout; | |
2356 | } | |
2357 | } | |
2358 | } | |
2359 | if (argc != 1) { | |
2360 | if (setjmp(toplevel) != 0) | |
2361 | exit(0); | |
2362 | tn(argc, argv); | |
2363 | } | |
2364 | setjmp(toplevel); | |
2365 | for (;;) | |
2366 | command(1); | |
2367 | } |