Mercurial > illumos > onarm
comparison usr/src/cmd/cmd-inet/usr.bin/telnet/telnet.c @ 0:c9caec207d52 b86
Initial porting based on b86
author | Koji Uno <koji.uno@sun.com> |
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date | Tue, 02 Jun 2009 18:56:50 +0900 |
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children | 1a15d5aaf794 |
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1 /* | |
2 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. | |
3 * Use is subject to license terms. | |
4 */ | |
5 | |
6 #pragma ident "@(#)telnet.c 1.27 05/06/12 SMI" | |
7 | |
8 /* | |
9 * Copyright (c) 1988, 1990, 1993 | |
10 * The Regents of the University of California. All rights reserved. | |
11 * | |
12 * Redistribution and use in source and binary forms, with or without | |
13 * modification, are permitted provided that the following conditions | |
14 * are met: | |
15 * 1. Redistributions of source code must retain the above copyright | |
16 * notice, this list of conditions and the following disclaimer. | |
17 * 2. Redistributions in binary form must reproduce the above copyright | |
18 * notice, this list of conditions and the following disclaimer in the | |
19 * documentation and/or other materials provided with the distribution. | |
20 * 3. All advertising materials mentioning features or use of this software | |
21 * must display the following acknowledgement: | |
22 * This product includes software developed by the University of | |
23 * California, Berkeley and its contributors. | |
24 * 4. Neither the name of the University nor the names of its contributors | |
25 * may be used to endorse or promote products derived from this software | |
26 * without specific prior written permission. | |
27 * | |
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
38 * SUCH DAMAGE. | |
39 */ | |
40 | |
41 #ifndef lint | |
42 static char sccsid[] = "@(#)telnet.c 8.1 (Berkeley) 6/6/93"; | |
43 #endif /* not lint */ | |
44 | |
45 #include <netdb.h> | |
46 #include <sys/types.h> | |
47 | |
48 #include <curses.h> | |
49 #include <signal.h> | |
50 /* | |
51 * By the way, we need to include curses.h before telnet.h since, | |
52 * among other things, telnet.h #defines 'DO', which is a variable | |
53 * declared in curses.h. | |
54 */ | |
55 | |
56 #include <arpa/telnet.h> | |
57 | |
58 #include <ctype.h> | |
59 | |
60 #include "ring.h" | |
61 | |
62 #include "defines.h" | |
63 #include "externs.h" | |
64 #include "types.h" | |
65 #include "general.h" | |
66 | |
67 #include "auth.h" | |
68 #include "encrypt.h" | |
69 | |
70 #define strip(x) ((x)&0x7f) | |
71 | |
72 /* Buffer for sub-options */ | |
73 static unsigned char subbuffer[SUBBUFSIZE]; | |
74 static unsigned char *subpointer; | |
75 static unsigned char *subend; | |
76 | |
77 #define SB_CLEAR() subpointer = subbuffer; | |
78 #define SB_TERM() { subend = subpointer; SB_CLEAR(); } | |
79 #define SB_ACCUM(c) if (subpointer < (subbuffer+sizeof (subbuffer))) { \ | |
80 *subpointer++ = (c); \ | |
81 } | |
82 | |
83 #define SB_GET() ((*subpointer++)&0xff) | |
84 #define SB_PEEK() ((*subpointer)&0xff) | |
85 #define SB_EOF() (subpointer >= subend) | |
86 #define SB_LEN() (subend - subpointer) | |
87 | |
88 char options[SUBBUFSIZE]; /* The combined options */ | |
89 char do_dont_resp[SUBBUFSIZE]; | |
90 char will_wont_resp[SUBBUFSIZE]; | |
91 | |
92 int eight = 0; | |
93 int autologin = 0; /* Autologin anyone? */ | |
94 int skiprc = 0; | |
95 int connected; | |
96 int showoptions; | |
97 static int ISend; /* trying to send network data in */ | |
98 int debug = 0; | |
99 int crmod; | |
100 int netdata; /* Print out network data flow */ | |
101 int crlf; /* Should '\r' be mapped to <CR><LF> (or <CR><NUL>)? */ | |
102 int telnetport; | |
103 int SYNCHing; /* we are in TELNET SYNCH mode */ | |
104 int flushout; /* flush output */ | |
105 int autoflush = 0; /* flush output when interrupting? */ | |
106 int autosynch; /* send interrupt characters with SYNCH? */ | |
107 int localflow; /* we handle flow control locally */ | |
108 int restartany; /* if flow control enabled, restart on any character */ | |
109 int localchars; /* we recognize interrupt/quit */ | |
110 int donelclchars; /* the user has set "localchars" */ | |
111 int donebinarytoggle; /* the user has put us in binary */ | |
112 int dontlecho; /* do we suppress local echoing right now? */ | |
113 int eof_pending = 0; /* we received a genuine EOF on input, send IAC-EOF */ | |
114 int globalmode; | |
115 | |
116 /* spin while waiting for authentication */ | |
117 boolean_t scheduler_lockout_tty = B_FALSE; | |
118 int encrypt_flag = 0; | |
119 int forwardable_flag = 0; | |
120 int forward_flag = 0; | |
121 boolean_t wantencryption = B_FALSE; | |
122 | |
123 char *prompt = 0; | |
124 | |
125 cc_t escape; | |
126 cc_t rlogin; | |
127 boolean_t escape_valid = B_TRUE; | |
128 #ifdef KLUDGELINEMODE | |
129 cc_t echoc; | |
130 #endif | |
131 | |
132 /* | |
133 * Telnet receiver states for fsm | |
134 */ | |
135 #define TS_DATA 0 | |
136 #define TS_IAC 1 | |
137 #define TS_WILL 2 | |
138 #define TS_WONT 3 | |
139 #define TS_DO 4 | |
140 #define TS_DONT 5 | |
141 #define TS_CR 6 | |
142 #define TS_SB 7 /* sub-option collection */ | |
143 #define TS_SE 8 /* looking for sub-option end */ | |
144 | |
145 static int telrcv_state; | |
146 #ifdef OLD_ENVIRON | |
147 static unsigned char telopt_environ = TELOPT_NEW_ENVIRON; | |
148 #else | |
149 #define telopt_environ TELOPT_NEW_ENVIRON | |
150 #endif | |
151 | |
152 jmp_buf toplevel = { 0 }; | |
153 jmp_buf peerdied; | |
154 | |
155 static int flushline; | |
156 int linemode; | |
157 | |
158 int reqd_linemode = 0; /* Set if either new or old line mode in */ | |
159 /* effect since before initial negotiations */ | |
160 | |
161 #ifdef KLUDGELINEMODE | |
162 int kludgelinemode = 1; | |
163 #endif | |
164 | |
165 /* | |
166 * The following are some clocks used to decide how to interpret | |
167 * the relationship between various variables. | |
168 */ | |
169 | |
170 Clocks clocks; | |
171 | |
172 #ifdef notdef | |
173 Modelist modelist[] = { | |
174 { "telnet command mode", COMMAND_LINE }, | |
175 { "character-at-a-time mode", 0 }, | |
176 { "character-at-a-time mode (local echo)", LOCAL_ECHO|LOCAL_CHARS }, | |
177 { "line-by-line mode (remote echo)", LINE | LOCAL_CHARS }, | |
178 { "line-by-line mode", LINE | LOCAL_ECHO | LOCAL_CHARS }, | |
179 { "line-by-line mode (local echoing suppressed)", LINE | LOCAL_CHARS }, | |
180 { "3270 mode", 0 }, | |
181 }; | |
182 #endif | |
183 | |
184 static void willoption(int); | |
185 static void wontoption(int); | |
186 static void lm_will(unsigned char *, int); | |
187 static void lm_wont(unsigned char *, int); | |
188 static void lm_do(unsigned char *, int); | |
189 static void lm_dont(unsigned char *, int); | |
190 static void slc_init(void); | |
191 static void slc_import(int); | |
192 static void slc_export(void); | |
193 static void slc_start_reply(size_t); | |
194 static void slc_add_reply(unsigned char, unsigned char, cc_t); | |
195 static void slc_end_reply(void); | |
196 static void slc(unsigned char *, int); | |
197 static int slc_update(void); | |
198 static void env_opt(unsigned char *, int); | |
199 static void env_opt_start(void); | |
200 static void sendeof(void); | |
201 static int is_unique(register char *, register char **, register char **); | |
202 | |
203 /* | |
204 * Initialize telnet environment. | |
205 */ | |
206 | |
207 int | |
208 init_telnet() | |
209 { | |
210 if (env_init() == 0) | |
211 return (0); | |
212 | |
213 SB_CLEAR(); | |
214 ClearArray(options); | |
215 | |
216 connected = ISend = localflow = donebinarytoggle = 0; | |
217 restartany = -1; | |
218 | |
219 SYNCHing = 0; | |
220 | |
221 /* Don't change NetTrace */ | |
222 | |
223 escape = CONTROL(']'); | |
224 rlogin = _POSIX_VDISABLE; | |
225 #ifdef KLUDGELINEMODE | |
226 echoc = CONTROL('E'); | |
227 #endif | |
228 | |
229 flushline = 1; | |
230 telrcv_state = TS_DATA; | |
231 | |
232 return (1); | |
233 } | |
234 | |
235 | |
236 #ifdef notdef | |
237 #include <varargs.h> | |
238 | |
239 /*VARARGS*/ | |
240 static void | |
241 printring(va_alist) | |
242 va_dcl | |
243 { | |
244 va_list ap; | |
245 char buffer[100]; /* where things go */ | |
246 char *ptr; | |
247 char *format; | |
248 char *string; | |
249 Ring *ring; | |
250 int i; | |
251 | |
252 va_start(ap); | |
253 | |
254 ring = va_arg(ap, Ring *); | |
255 format = va_arg(ap, char *); | |
256 ptr = buffer; | |
257 | |
258 while ((i = *format++) != 0) { | |
259 if (i == '%') { | |
260 i = *format++; | |
261 switch (i) { | |
262 case 'c': | |
263 *ptr++ = va_arg(ap, int); | |
264 break; | |
265 case 's': | |
266 string = va_arg(ap, char *); | |
267 ring_supply_data(ring, buffer, ptr-buffer); | |
268 ring_supply_data(ring, string, strlen(string)); | |
269 ptr = buffer; | |
270 break; | |
271 case 0: | |
272 ExitString("printring: trailing %%.\n", | |
273 EXIT_FAILURE); | |
274 /*NOTREACHED*/ | |
275 default: | |
276 ExitString("printring: unknown format " | |
277 "character.\n", EXIT_FAILURE); | |
278 /*NOTREACHED*/ | |
279 } | |
280 } else { | |
281 *ptr++ = i; | |
282 } | |
283 } | |
284 ring_supply_data(ring, buffer, ptr-buffer); | |
285 } | |
286 #endif | |
287 | |
288 /* | |
289 * These routines are in charge of sending option negotiations | |
290 * to the other side. | |
291 * | |
292 * The basic idea is that we send the negotiation if either side | |
293 * is in disagreement as to what the current state should be. | |
294 */ | |
295 | |
296 void | |
297 send_do(c, init) | |
298 register int c, init; | |
299 { | |
300 if (init) { | |
301 if (((do_dont_resp[c] == 0) && my_state_is_do(c)) || | |
302 my_want_state_is_do(c)) | |
303 return; | |
304 set_my_want_state_do(c); | |
305 do_dont_resp[c]++; | |
306 } | |
307 NET2ADD(IAC, DO); | |
308 NETADD(c); | |
309 printoption("SENT", DO, c); | |
310 } | |
311 | |
312 void | |
313 send_dont(c, init) | |
314 register int c, init; | |
315 { | |
316 if (init) { | |
317 if (((do_dont_resp[c] == 0) && my_state_is_dont(c)) || | |
318 my_want_state_is_dont(c)) | |
319 return; | |
320 set_my_want_state_dont(c); | |
321 do_dont_resp[c]++; | |
322 } | |
323 NET2ADD(IAC, DONT); | |
324 NETADD(c); | |
325 printoption("SENT", DONT, c); | |
326 } | |
327 | |
328 void | |
329 send_will(c, init) | |
330 register int c, init; | |
331 { | |
332 if (init) { | |
333 if (((will_wont_resp[c] == 0) && my_state_is_will(c)) || | |
334 my_want_state_is_will(c)) | |
335 return; | |
336 set_my_want_state_will(c); | |
337 will_wont_resp[c]++; | |
338 } | |
339 NET2ADD(IAC, WILL); | |
340 NETADD(c); | |
341 printoption("SENT", WILL, c); | |
342 } | |
343 | |
344 void | |
345 send_wont(c, init) | |
346 register int c, init; | |
347 { | |
348 if (init) { | |
349 if (((will_wont_resp[c] == 0) && my_state_is_wont(c)) || | |
350 my_want_state_is_wont(c)) | |
351 return; | |
352 set_my_want_state_wont(c); | |
353 will_wont_resp[c]++; | |
354 } | |
355 NET2ADD(IAC, WONT); | |
356 NETADD(c); | |
357 printoption("SENT", WONT, c); | |
358 } | |
359 | |
360 | |
361 static void | |
362 willoption(option) | |
363 int option; | |
364 { | |
365 int new_state_ok = 0; | |
366 | |
367 if (do_dont_resp[option]) { | |
368 --do_dont_resp[option]; | |
369 if (do_dont_resp[option] && my_state_is_do(option)) | |
370 --do_dont_resp[option]; | |
371 } | |
372 | |
373 if ((do_dont_resp[option] == 0) && my_want_state_is_dont(option)) { | |
374 | |
375 switch (option) { | |
376 | |
377 case TELOPT_ECHO: | |
378 case TELOPT_SGA: | |
379 if (reqd_linemode && my_state_is_dont(option)) { | |
380 break; | |
381 } | |
382 /* FALLTHROUGH */ | |
383 case TELOPT_BINARY: | |
384 settimer(modenegotiated); | |
385 /* FALLTHROUGH */ | |
386 case TELOPT_STATUS: | |
387 case TELOPT_AUTHENTICATION: | |
388 /* FALLTHROUGH */ | |
389 case TELOPT_ENCRYPT: | |
390 new_state_ok = 1; | |
391 break; | |
392 | |
393 case TELOPT_TM: | |
394 if (flushout) | |
395 flushout = 0; | |
396 /* | |
397 * Special case for TM. If we get back a WILL, | |
398 * pretend we got back a WONT. | |
399 */ | |
400 set_my_want_state_dont(option); | |
401 set_my_state_dont(option); | |
402 return; /* Never reply to TM will's/wont's */ | |
403 | |
404 case TELOPT_LINEMODE: | |
405 default: | |
406 break; | |
407 } | |
408 | |
409 if (new_state_ok) { | |
410 set_my_want_state_do(option); | |
411 send_do(option, 0); | |
412 setconnmode(0); /* possibly set new tty mode */ | |
413 } else { | |
414 do_dont_resp[option]++; | |
415 send_dont(option, 0); | |
416 } | |
417 } | |
418 set_my_state_do(option); | |
419 if (option == TELOPT_ENCRYPT) | |
420 encrypt_send_support(); | |
421 } | |
422 | |
423 static void | |
424 wontoption(option) | |
425 int option; | |
426 { | |
427 if (do_dont_resp[option]) { | |
428 --do_dont_resp[option]; | |
429 if (do_dont_resp[option] && my_state_is_dont(option)) | |
430 --do_dont_resp[option]; | |
431 } | |
432 | |
433 if ((do_dont_resp[option] == 0) && my_want_state_is_do(option)) { | |
434 | |
435 switch (option) { | |
436 | |
437 #ifdef KLUDGELINEMODE | |
438 case TELOPT_SGA: | |
439 if (!kludgelinemode) | |
440 break; | |
441 /* FALLTHROUGH */ | |
442 #endif | |
443 case TELOPT_ECHO: | |
444 settimer(modenegotiated); | |
445 break; | |
446 | |
447 case TELOPT_TM: | |
448 if (flushout) | |
449 flushout = 0; | |
450 set_my_want_state_dont(option); | |
451 set_my_state_dont(option); | |
452 return; /* Never reply to TM will's/wont's */ | |
453 | |
454 default: | |
455 break; | |
456 } | |
457 set_my_want_state_dont(option); | |
458 if (my_state_is_do(option)) | |
459 send_dont(option, 0); | |
460 setconnmode(0); /* Set new tty mode */ | |
461 } else if (option == TELOPT_TM) { | |
462 /* | |
463 * Special case for TM. | |
464 */ | |
465 if (flushout) | |
466 flushout = 0; | |
467 set_my_want_state_dont(option); | |
468 } | |
469 set_my_state_dont(option); | |
470 } | |
471 | |
472 static void | |
473 dooption(option) | |
474 int option; | |
475 { | |
476 int new_state_ok = 0; | |
477 | |
478 if (will_wont_resp[option]) { | |
479 --will_wont_resp[option]; | |
480 if (will_wont_resp[option] && my_state_is_will(option)) | |
481 --will_wont_resp[option]; | |
482 } | |
483 | |
484 if (will_wont_resp[option] == 0) { | |
485 if (my_want_state_is_wont(option)) { | |
486 | |
487 switch (option) { | |
488 | |
489 case TELOPT_TM: | |
490 /* | |
491 * Special case for TM. We send a WILL, | |
492 * but pretend we sent WONT. | |
493 */ | |
494 send_will(option, 0); | |
495 set_my_want_state_wont(TELOPT_TM); | |
496 set_my_state_wont(TELOPT_TM); | |
497 return; | |
498 | |
499 case TELOPT_BINARY: /* binary mode */ | |
500 case TELOPT_NAWS: /* window size */ | |
501 case TELOPT_TSPEED: /* terminal speed */ | |
502 case TELOPT_LFLOW: /* local flow control */ | |
503 case TELOPT_TTYPE: /* terminal type option */ | |
504 case TELOPT_SGA: /* no big deal */ | |
505 case TELOPT_ENCRYPT: /* encryption variable option */ | |
506 new_state_ok = 1; | |
507 break; | |
508 | |
509 case TELOPT_NEW_ENVIRON: | |
510 /* New environment variable option */ | |
511 #ifdef OLD_ENVIRON | |
512 if (my_state_is_will(TELOPT_OLD_ENVIRON)) | |
513 /* turn off the old */ | |
514 send_wont(TELOPT_OLD_ENVIRON, 1); | |
515 goto env_common; | |
516 case TELOPT_OLD_ENVIRON: | |
517 /* Old environment variable option */ | |
518 if (my_state_is_will(TELOPT_NEW_ENVIRON)) | |
519 /* Don't enable if new one is in use! */ | |
520 break; | |
521 env_common: | |
522 telopt_environ = option; | |
523 #endif | |
524 new_state_ok = 1; | |
525 break; | |
526 | |
527 case TELOPT_AUTHENTICATION: | |
528 if (autologin) | |
529 new_state_ok = 1; | |
530 break; | |
531 | |
532 case TELOPT_XDISPLOC: /* X Display location */ | |
533 if (env_getvalue((unsigned char *)"DISPLAY")) | |
534 new_state_ok = 1; | |
535 break; | |
536 | |
537 case TELOPT_LINEMODE: | |
538 #ifdef KLUDGELINEMODE | |
539 kludgelinemode = 0; | |
540 send_do(TELOPT_SGA, 1); | |
541 #endif | |
542 set_my_want_state_will(TELOPT_LINEMODE); | |
543 send_will(option, 0); | |
544 set_my_state_will(TELOPT_LINEMODE); | |
545 slc_init(); | |
546 return; | |
547 | |
548 case TELOPT_ECHO: /* We're never going to echo... */ | |
549 default: | |
550 break; | |
551 } | |
552 | |
553 if (new_state_ok) { | |
554 set_my_want_state_will(option); | |
555 send_will(option, 0); | |
556 setconnmode(0); /* Set new tty mode */ | |
557 } else { | |
558 will_wont_resp[option]++; | |
559 send_wont(option, 0); | |
560 } | |
561 } else { | |
562 /* | |
563 * Handle options that need more things done after the | |
564 * other side has acknowledged the option. | |
565 */ | |
566 switch (option) { | |
567 case TELOPT_LINEMODE: | |
568 #ifdef KLUDGELINEMODE | |
569 kludgelinemode = 0; | |
570 send_do(TELOPT_SGA, 1); | |
571 #endif | |
572 set_my_state_will(option); | |
573 slc_init(); | |
574 send_do(TELOPT_SGA, 0); | |
575 return; | |
576 } | |
577 } | |
578 } | |
579 set_my_state_will(option); | |
580 } | |
581 | |
582 static void | |
583 dontoption(option) | |
584 int option; | |
585 { | |
586 | |
587 if (will_wont_resp[option]) { | |
588 --will_wont_resp[option]; | |
589 if (will_wont_resp[option] && my_state_is_wont(option)) | |
590 --will_wont_resp[option]; | |
591 } | |
592 | |
593 if ((will_wont_resp[option] == 0) && my_want_state_is_will(option)) { | |
594 switch (option) { | |
595 case TELOPT_LINEMODE: | |
596 linemode = 0; /* put us back to the default state */ | |
597 break; | |
598 #ifdef OLD_ENVIRON | |
599 case TELOPT_NEW_ENVIRON: | |
600 /* | |
601 * The new environ option wasn't recognized, try | |
602 * the old one. | |
603 */ | |
604 send_will(TELOPT_OLD_ENVIRON, 1); | |
605 telopt_environ = TELOPT_OLD_ENVIRON; | |
606 break; | |
607 #endif | |
608 } | |
609 /* we always accept a DONT */ | |
610 set_my_want_state_wont(option); | |
611 if (my_state_is_will(option)) | |
612 send_wont(option, 0); | |
613 setconnmode(0); /* Set new tty mode */ | |
614 } | |
615 set_my_state_wont(option); | |
616 } | |
617 | |
618 /* | |
619 * Given a buffer returned by tgetent(), this routine will turn | |
620 * the pipe seperated list of names in the buffer into an array | |
621 * of pointers to null terminated names. We toss out any bad, | |
622 * duplicate, or verbose names (names with spaces). | |
623 */ | |
624 | |
625 static char *name_unknown = "UNKNOWN"; | |
626 static char *unknown[] = { 0, 0 }; | |
627 | |
628 static char ** | |
629 mklist(buf, name) | |
630 char *buf, *name; | |
631 { | |
632 register int n; | |
633 register char c, *cp, **argvp, *cp2, **argv, **avt; | |
634 | |
635 if (name) { | |
636 if (strlen(name) > 40u) { | |
637 name = 0; | |
638 unknown[0] = name_unknown; | |
639 } else { | |
640 unknown[0] = name; | |
641 upcase(name); | |
642 } | |
643 } else | |
644 unknown[0] = name_unknown; | |
645 /* | |
646 * Count up the number of names. | |
647 */ | |
648 for (n = 1, cp = buf; *cp && *cp != ':'; cp++) { | |
649 if (*cp == '|') | |
650 n++; | |
651 } | |
652 /* | |
653 * Allocate an array to put the name pointers into | |
654 */ | |
655 argv = malloc((n+3)*sizeof (char *)); | |
656 if (argv == 0) | |
657 return (unknown); | |
658 | |
659 /* | |
660 * Fill up the array of pointers to names. | |
661 */ | |
662 *argv = 0; | |
663 argvp = argv+1; | |
664 n = 0; | |
665 for (cp = cp2 = buf; (c = *cp) != NULL; cp++) { | |
666 if (c == '|' || c == ':') { | |
667 *cp++ = '\0'; | |
668 /* | |
669 * Skip entries that have spaces or are over 40 | |
670 * characters long. If this is our environment | |
671 * name, then put it up front. Otherwise, as | |
672 * long as this is not a duplicate name (case | |
673 * insensitive) add it to the list. | |
674 */ | |
675 if (n || (cp - cp2 > 41)) | |
676 /* EMPTY */; | |
677 else if (name && (strncasecmp(name, cp2, cp-cp2) == 0)) | |
678 *argv = cp2; | |
679 else if (is_unique(cp2, argv+1, argvp)) | |
680 *argvp++ = cp2; | |
681 if (c == ':') | |
682 break; | |
683 /* | |
684 * Skip multiple delimiters. Reset cp2 to | |
685 * the beginning of the next name. Reset n, | |
686 * the flag for names with spaces. | |
687 */ | |
688 while ((c = *cp) == '|') | |
689 cp++; | |
690 cp2 = cp; | |
691 n = 0; | |
692 } | |
693 /* | |
694 * Skip entries with spaces or non-ascii values. | |
695 * Convert lower case letters to upper case. | |
696 */ | |
697 if ((c == ' ') || !isascii(c)) | |
698 n = 1; | |
699 else if (islower(c)) | |
700 *cp = toupper(c); | |
701 } | |
702 | |
703 /* | |
704 * Check for an old V6 2 character name. If the second | |
705 * name points to the beginning of the buffer, and is | |
706 * only 2 characters long, move it to the end of the array. | |
707 */ | |
708 if ((argv[1] == buf) && (strlen(argv[1]) == 2)) { | |
709 --argvp; | |
710 for (avt = &argv[1]; avt < argvp; avt++) | |
711 *avt = *(avt+1); | |
712 *argvp++ = buf; | |
713 } | |
714 | |
715 /* | |
716 * Duplicate last name, for TTYPE option, and null | |
717 * terminate the array. If we didn't find a match on | |
718 * our terminal name, put that name at the beginning. | |
719 */ | |
720 cp = *(argvp-1); | |
721 *argvp++ = cp; | |
722 *argvp = 0; | |
723 | |
724 if (*argv == 0) { | |
725 if (name) | |
726 *argv = name; | |
727 else { | |
728 --argvp; | |
729 for (avt = argv; avt < argvp; avt++) | |
730 *avt = *(avt+1); | |
731 } | |
732 } | |
733 if (*argv) | |
734 return (argv); | |
735 else | |
736 return (unknown); | |
737 } | |
738 | |
739 static int | |
740 is_unique(name, as, ae) | |
741 register char *name, **as, **ae; | |
742 { | |
743 register char **ap; | |
744 register int n; | |
745 | |
746 n = strlen(name) + 1; | |
747 for (ap = as; ap < ae; ap++) | |
748 if (strncasecmp(*ap, name, n) == 0) | |
749 return (0); | |
750 return (1); | |
751 } | |
752 | |
753 #define termbuf ttytype | |
754 extern char ttytype[]; | |
755 | |
756 int resettermname = 1; | |
757 | |
758 static char * | |
759 gettermname(void) | |
760 { | |
761 char *tname; | |
762 static char **tnamep = 0; | |
763 static char **next; | |
764 int err; | |
765 | |
766 if (resettermname) { | |
767 resettermname = 0; | |
768 if (tnamep && tnamep != unknown) | |
769 free(tnamep); | |
770 tname = (char *)env_getvalue((unsigned char *)"TERM"); | |
771 if ((tname != NULL) && (setupterm(tname, 1, &err) == 0)) { | |
772 tnamep = mklist(termbuf, tname); | |
773 } else { | |
774 if (tname && (strlen(tname) <= 40u)) { | |
775 unknown[0] = tname; | |
776 upcase(tname); | |
777 } else | |
778 unknown[0] = name_unknown; | |
779 tnamep = unknown; | |
780 } | |
781 next = tnamep; | |
782 } | |
783 if (*next == 0) | |
784 next = tnamep; | |
785 return (*next++); | |
786 } | |
787 /* | |
788 * suboption() | |
789 * | |
790 * Look at the sub-option buffer, and try to be helpful to the other | |
791 * side. | |
792 * | |
793 * Currently we recognize: | |
794 * | |
795 * Terminal type, send request. | |
796 * Terminal speed (send request). | |
797 * Local flow control (is request). | |
798 * Linemode | |
799 */ | |
800 | |
801 static void | |
802 suboption() | |
803 { | |
804 unsigned char subchar; | |
805 | |
806 printsub('<', subbuffer, SB_LEN()+2); | |
807 switch (subchar = SB_GET()) { | |
808 case TELOPT_TTYPE: | |
809 if (my_want_state_is_wont(TELOPT_TTYPE)) | |
810 return; | |
811 if (SB_EOF() || SB_GET() != TELQUAL_SEND) { | |
812 return; | |
813 } else { | |
814 char *name; | |
815 unsigned char temp[50]; | |
816 int len, bytes; | |
817 | |
818 name = gettermname(); | |
819 len = strlen(name) + 4 + 2; | |
820 bytes = snprintf((char *)temp, sizeof (temp), | |
821 "%c%c%c%c%s%c%c", IAC, SB, | |
822 TELOPT_TTYPE, TELQUAL_IS, name, IAC, SE); | |
823 if ((len < NETROOM()) && (bytes < sizeof (temp))) { | |
824 ring_supply_data(&netoring, temp, len); | |
825 printsub('>', &temp[2], len-2); | |
826 } else { | |
827 ExitString("No room in buffer for " | |
828 "terminal type.\n", EXIT_FAILURE); | |
829 /*NOTREACHED*/ | |
830 } | |
831 } | |
832 break; | |
833 case TELOPT_TSPEED: | |
834 if (my_want_state_is_wont(TELOPT_TSPEED)) | |
835 return; | |
836 if (SB_EOF()) | |
837 return; | |
838 if (SB_GET() == TELQUAL_SEND) { | |
839 int ospeed, ispeed; | |
840 unsigned char temp[50]; | |
841 int len, bytes; | |
842 | |
843 TerminalSpeeds(&ispeed, &ospeed); | |
844 | |
845 bytes = snprintf((char *)temp, sizeof (temp), | |
846 "%c%c%c%c%d,%d%c%c", IAC, SB, | |
847 TELOPT_TSPEED, TELQUAL_IS, ospeed, ispeed, IAC, SE); | |
848 len = strlen((char *)temp+4) + 4; /* temp[3] is 0 ... */ | |
849 | |
850 if ((len < NETROOM()) && (bytes < sizeof (temp))) { | |
851 ring_supply_data(&netoring, temp, len); | |
852 printsub('>', temp+2, len - 2); | |
853 } | |
854 else | |
855 (void) printf( | |
856 "telnet: not enough room in buffer " | |
857 "for terminal speed option reply\n"); | |
858 } | |
859 break; | |
860 case TELOPT_LFLOW: | |
861 if (my_want_state_is_wont(TELOPT_LFLOW)) | |
862 return; | |
863 if (SB_EOF()) | |
864 return; | |
865 switch (SB_GET()) { | |
866 case LFLOW_RESTART_ANY: | |
867 restartany = 1; | |
868 break; | |
869 case LFLOW_RESTART_XON: | |
870 restartany = 0; | |
871 break; | |
872 case LFLOW_ON: | |
873 localflow = 1; | |
874 break; | |
875 case LFLOW_OFF: | |
876 localflow = 0; | |
877 break; | |
878 default: | |
879 return; | |
880 } | |
881 setcommandmode(); | |
882 setconnmode(0); | |
883 break; | |
884 | |
885 case TELOPT_LINEMODE: | |
886 if (my_want_state_is_wont(TELOPT_LINEMODE)) | |
887 return; | |
888 if (SB_EOF()) | |
889 return; | |
890 switch (SB_GET()) { | |
891 case WILL: | |
892 lm_will(subpointer, SB_LEN()); | |
893 break; | |
894 case WONT: | |
895 lm_wont(subpointer, SB_LEN()); | |
896 break; | |
897 case DO: | |
898 lm_do(subpointer, SB_LEN()); | |
899 break; | |
900 case DONT: | |
901 lm_dont(subpointer, SB_LEN()); | |
902 break; | |
903 case LM_SLC: | |
904 slc(subpointer, SB_LEN()); | |
905 break; | |
906 case LM_MODE: | |
907 lm_mode(subpointer, SB_LEN(), 0); | |
908 break; | |
909 default: | |
910 break; | |
911 } | |
912 break; | |
913 | |
914 #ifdef OLD_ENVIRON | |
915 case TELOPT_OLD_ENVIRON: | |
916 #endif | |
917 case TELOPT_NEW_ENVIRON: | |
918 if (SB_EOF()) | |
919 return; | |
920 switch (SB_PEEK()) { | |
921 case TELQUAL_IS: | |
922 case TELQUAL_INFO: | |
923 if (my_want_state_is_dont(subchar)) | |
924 return; | |
925 break; | |
926 case TELQUAL_SEND: | |
927 if (my_want_state_is_wont(subchar)) { | |
928 return; | |
929 } | |
930 break; | |
931 default: | |
932 return; | |
933 } | |
934 env_opt(subpointer, SB_LEN()); | |
935 break; | |
936 | |
937 case TELOPT_XDISPLOC: | |
938 if (my_want_state_is_wont(TELOPT_XDISPLOC)) | |
939 return; | |
940 if (SB_EOF()) | |
941 return; | |
942 if (SB_GET() == TELQUAL_SEND) { | |
943 unsigned char temp[50], *dp; | |
944 int len, bytes; | |
945 | |
946 if ((dp = env_getvalue((unsigned char *)"DISPLAY")) == | |
947 NULL) { | |
948 /* | |
949 * Something happened, we no longer have a | |
950 * DISPLAY variable. So, turn off the option. | |
951 */ | |
952 send_wont(TELOPT_XDISPLOC, 1); | |
953 break; | |
954 } | |
955 bytes = snprintf((char *)temp, sizeof (temp), | |
956 "%c%c%c%c%s%c%c", IAC, SB, | |
957 TELOPT_XDISPLOC, TELQUAL_IS, dp, IAC, SE); | |
958 len = strlen((char *)temp+4) + 4; /* temp[3] is 0 ... */ | |
959 | |
960 if ((len < NETROOM()) && (bytes < sizeof (temp))) { | |
961 ring_supply_data(&netoring, temp, len); | |
962 printsub('>', temp+2, len - 2); | |
963 } | |
964 else | |
965 (void) printf( | |
966 "telnet: not enough room in buffer" | |
967 " for display location option reply\n"); | |
968 } | |
969 break; | |
970 | |
971 case TELOPT_AUTHENTICATION: { | |
972 if (!autologin) | |
973 break; | |
974 if (SB_EOF()) | |
975 return; | |
976 switch (SB_GET()) { | |
977 case TELQUAL_SEND: | |
978 if (my_want_state_is_wont(TELOPT_AUTHENTICATION)) | |
979 return; | |
980 auth_send(subpointer, SB_LEN()); | |
981 break; | |
982 case TELQUAL_REPLY: | |
983 if (my_want_state_is_wont(TELOPT_AUTHENTICATION)) | |
984 return; | |
985 auth_reply(subpointer, SB_LEN()); | |
986 break; | |
987 } | |
988 } | |
989 break; | |
990 | |
991 case TELOPT_ENCRYPT: | |
992 if (SB_EOF()) | |
993 return; | |
994 switch (SB_GET()) { | |
995 case ENCRYPT_START: | |
996 if (my_want_state_is_dont(TELOPT_ENCRYPT)) | |
997 return; | |
998 encrypt_start(subpointer, SB_LEN()); | |
999 break; | |
1000 case ENCRYPT_END: | |
1001 if (my_want_state_is_dont(TELOPT_ENCRYPT)) | |
1002 return; | |
1003 encrypt_end(); | |
1004 break; | |
1005 case ENCRYPT_SUPPORT: | |
1006 if (my_want_state_is_wont(TELOPT_ENCRYPT)) | |
1007 return; | |
1008 encrypt_support(subpointer, SB_LEN()); | |
1009 break; | |
1010 case ENCRYPT_REQSTART: | |
1011 if (my_want_state_is_wont(TELOPT_ENCRYPT)) | |
1012 return; | |
1013 encrypt_request_start(subpointer, SB_LEN()); | |
1014 break; | |
1015 case ENCRYPT_REQEND: | |
1016 if (my_want_state_is_wont(TELOPT_ENCRYPT)) | |
1017 return; | |
1018 /* | |
1019 * We can always send an REQEND so that we cannot | |
1020 * get stuck encrypting. We should only get this | |
1021 * if we have been able to get in the correct mode | |
1022 * anyhow. | |
1023 */ | |
1024 encrypt_request_end(); | |
1025 break; | |
1026 case ENCRYPT_IS: | |
1027 if (my_want_state_is_dont(TELOPT_ENCRYPT)) | |
1028 return; | |
1029 encrypt_is(subpointer, SB_LEN()); | |
1030 break; | |
1031 case ENCRYPT_REPLY: | |
1032 if (my_want_state_is_wont(TELOPT_ENCRYPT)) | |
1033 return; | |
1034 encrypt_reply(subpointer, SB_LEN()); | |
1035 break; | |
1036 case ENCRYPT_ENC_KEYID: | |
1037 if (my_want_state_is_dont(TELOPT_ENCRYPT)) | |
1038 return; | |
1039 encrypt_enc_keyid(subpointer, SB_LEN()); | |
1040 break; | |
1041 case ENCRYPT_DEC_KEYID: | |
1042 if (my_want_state_is_wont(TELOPT_ENCRYPT)) | |
1043 return; | |
1044 encrypt_dec_keyid(subpointer, SB_LEN()); | |
1045 break; | |
1046 default: | |
1047 break; | |
1048 } | |
1049 break; | |
1050 default: | |
1051 break; | |
1052 } | |
1053 } | |
1054 | |
1055 static unsigned char str_lm[] = { IAC, SB, TELOPT_LINEMODE, 0, 0, IAC, SE }; | |
1056 | |
1057 static void | |
1058 lm_will(cmd, len) | |
1059 unsigned char *cmd; | |
1060 int len; | |
1061 { | |
1062 if (len < 1) { | |
1063 /* Should not happen... */ | |
1064 (void) printf( | |
1065 "telnet: command missing from linemode WILL request\n"); | |
1066 return; | |
1067 } | |
1068 switch (cmd[0]) { | |
1069 case LM_FORWARDMASK: /* We shouldn't ever get this... */ | |
1070 default: | |
1071 str_lm[3] = DONT; | |
1072 str_lm[4] = cmd[0]; | |
1073 if (NETROOM() > sizeof (str_lm)) { | |
1074 ring_supply_data(&netoring, str_lm, sizeof (str_lm)); | |
1075 printsub('>', &str_lm[2], sizeof (str_lm)-2); | |
1076 } | |
1077 else | |
1078 (void) printf("telnet: not enough room in buffer for" | |
1079 "reply to linemode WILL request\n"); | |
1080 break; | |
1081 } | |
1082 } | |
1083 | |
1084 static void | |
1085 lm_wont(cmd, len) | |
1086 unsigned char *cmd; | |
1087 int len; | |
1088 { | |
1089 if (len < 1) { | |
1090 /* Should not happen... */ | |
1091 (void) printf( | |
1092 "telnet: command missing from linemode WONT request\n"); | |
1093 return; | |
1094 } | |
1095 switch (cmd[0]) { | |
1096 case LM_FORWARDMASK: /* We shouldn't ever get this... */ | |
1097 default: | |
1098 /* We are always DONT, so don't respond */ | |
1099 return; | |
1100 } | |
1101 } | |
1102 | |
1103 static void | |
1104 lm_do(cmd, len) | |
1105 unsigned char *cmd; | |
1106 int len; | |
1107 { | |
1108 if (len < 1) { | |
1109 /* Should not happen... */ | |
1110 (void) printf( | |
1111 "telnet: command missing from linemode DO request\n"); | |
1112 return; | |
1113 } | |
1114 switch (cmd[0]) { | |
1115 case LM_FORWARDMASK: | |
1116 default: | |
1117 str_lm[3] = WONT; | |
1118 str_lm[4] = cmd[0]; | |
1119 if (NETROOM() > sizeof (str_lm)) { | |
1120 ring_supply_data(&netoring, str_lm, sizeof (str_lm)); | |
1121 printsub('>', &str_lm[2], sizeof (str_lm)-2); | |
1122 } | |
1123 else | |
1124 (void) printf("telnet: not enough room in buffer for" | |
1125 "reply to linemode DO request\n"); | |
1126 break; | |
1127 } | |
1128 } | |
1129 | |
1130 static void | |
1131 lm_dont(cmd, len) | |
1132 unsigned char *cmd; | |
1133 int len; | |
1134 { | |
1135 if (len < 1) { | |
1136 /* Should not happen... */ | |
1137 (void) printf( | |
1138 "telnet: command missing from linemode DONT request\n"); | |
1139 return; | |
1140 } | |
1141 switch (cmd[0]) { | |
1142 case LM_FORWARDMASK: | |
1143 default: | |
1144 /* we are always WONT, so don't respond */ | |
1145 break; | |
1146 } | |
1147 } | |
1148 | |
1149 static unsigned char str_lm_mode[] = { | |
1150 IAC, SB, TELOPT_LINEMODE, LM_MODE, 0, IAC, SE | |
1151 }; | |
1152 | |
1153 void | |
1154 lm_mode(cmd, len, init) | |
1155 unsigned char *cmd; | |
1156 int len, init; | |
1157 { | |
1158 if (len != 1) | |
1159 return; | |
1160 if ((linemode&MODE_MASK&~MODE_ACK) == *cmd) | |
1161 return; | |
1162 linemode = *cmd&(MODE_MASK&~MODE_ACK); | |
1163 str_lm_mode[4] = linemode; | |
1164 if (!init) | |
1165 str_lm_mode[4] |= MODE_ACK; | |
1166 if (NETROOM() > sizeof (str_lm_mode)) { | |
1167 ring_supply_data(&netoring, str_lm_mode, sizeof (str_lm_mode)); | |
1168 printsub('>', &str_lm_mode[2], sizeof (str_lm_mode)-2); | |
1169 } | |
1170 else | |
1171 (void) printf("telnet: not enough room in buffer for" | |
1172 "reply to linemode request\n"); | |
1173 setconnmode(0); /* set changed mode */ | |
1174 } | |
1175 | |
1176 | |
1177 | |
1178 /* | |
1179 * slc() | |
1180 * Handle special character suboption of LINEMODE. | |
1181 */ | |
1182 | |
1183 static struct spc { | |
1184 cc_t val; | |
1185 cc_t *valp; | |
1186 char flags; /* Current flags & level */ | |
1187 char mylevel; /* Maximum level & flags */ | |
1188 } spc_data[NSLC+1]; | |
1189 | |
1190 #define SLC_IMPORT 0 | |
1191 #define SLC_EXPORT 1 | |
1192 #define SLC_RVALUE 2 | |
1193 static int slc_mode = SLC_EXPORT; | |
1194 | |
1195 static void | |
1196 slc_init() | |
1197 { | |
1198 register struct spc *spcp; | |
1199 | |
1200 localchars = 1; | |
1201 for (spcp = spc_data; spcp < &spc_data[NSLC+1]; spcp++) { | |
1202 spcp->val = 0; | |
1203 spcp->valp = 0; | |
1204 spcp->flags = spcp->mylevel = SLC_NOSUPPORT; | |
1205 } | |
1206 | |
1207 #define initfunc(func, flags) { \ | |
1208 spcp = &spc_data[func]; \ | |
1209 if (spcp->valp = tcval(func)) { \ | |
1210 spcp->val = *spcp->valp; \ | |
1211 spcp->mylevel = SLC_VARIABLE|(flags);\ | |
1212 } else { \ | |
1213 spcp->val = 0; \ | |
1214 spcp->mylevel = SLC_DEFAULT; \ | |
1215 } \ | |
1216 } | |
1217 | |
1218 initfunc(SLC_SYNCH, 0); | |
1219 /* No BRK */ | |
1220 initfunc(SLC_AO, 0); | |
1221 initfunc(SLC_AYT, 0); | |
1222 /* No EOR */ | |
1223 initfunc(SLC_ABORT, SLC_FLUSHIN|SLC_FLUSHOUT); | |
1224 initfunc(SLC_EOF, 0); | |
1225 initfunc(SLC_SUSP, SLC_FLUSHIN); | |
1226 initfunc(SLC_EC, 0); | |
1227 initfunc(SLC_EL, 0); | |
1228 initfunc(SLC_EW, 0); | |
1229 initfunc(SLC_RP, 0); | |
1230 initfunc(SLC_LNEXT, 0); | |
1231 initfunc(SLC_XON, 0); | |
1232 initfunc(SLC_XOFF, 0); | |
1233 initfunc(SLC_FORW1, 0); | |
1234 #ifdef USE_TERMIO | |
1235 initfunc(SLC_FORW2, 0); | |
1236 /* No FORW2 */ | |
1237 #endif | |
1238 | |
1239 initfunc(SLC_IP, SLC_FLUSHIN|SLC_FLUSHOUT); | |
1240 #undef initfunc | |
1241 | |
1242 if (slc_mode == SLC_EXPORT) | |
1243 slc_export(); | |
1244 else | |
1245 slc_import(1); | |
1246 | |
1247 } | |
1248 | |
1249 void | |
1250 slcstate() | |
1251 { | |
1252 (void) printf("Special characters are %s values\n", | |
1253 slc_mode == SLC_IMPORT ? "remote default" : | |
1254 slc_mode == SLC_EXPORT ? "local" : | |
1255 "remote"); | |
1256 } | |
1257 | |
1258 void | |
1259 slc_mode_export() | |
1260 { | |
1261 slc_mode = SLC_EXPORT; | |
1262 if (my_state_is_will(TELOPT_LINEMODE)) | |
1263 slc_export(); | |
1264 } | |
1265 | |
1266 void | |
1267 slc_mode_import(def) | |
1268 int def; | |
1269 { | |
1270 slc_mode = def ? SLC_IMPORT : SLC_RVALUE; | |
1271 if (my_state_is_will(TELOPT_LINEMODE)) | |
1272 slc_import(def); | |
1273 } | |
1274 | |
1275 static unsigned char slc_import_val[] = { | |
1276 IAC, SB, TELOPT_LINEMODE, LM_SLC, 0, SLC_VARIABLE, 0, IAC, SE | |
1277 }; | |
1278 static unsigned char slc_import_def[] = { | |
1279 IAC, SB, TELOPT_LINEMODE, LM_SLC, 0, SLC_DEFAULT, 0, IAC, SE | |
1280 }; | |
1281 | |
1282 static void | |
1283 slc_import(def) | |
1284 int def; | |
1285 { | |
1286 if (NETROOM() > sizeof (slc_import_val)) { | |
1287 if (def) { | |
1288 ring_supply_data(&netoring, slc_import_def, | |
1289 sizeof (slc_import_def)); | |
1290 printsub('>', &slc_import_def[2], | |
1291 sizeof (slc_import_def)-2); | |
1292 } else { | |
1293 ring_supply_data(&netoring, slc_import_val, | |
1294 sizeof (slc_import_val)); | |
1295 printsub('>', &slc_import_val[2], | |
1296 sizeof (slc_import_val)-2); | |
1297 } | |
1298 } | |
1299 else | |
1300 (void) printf( | |
1301 "telnet: not enough room in buffer for slc import" | |
1302 " request\n"); | |
1303 } | |
1304 | |
1305 static uchar_t *slc_reply = NULL; | |
1306 static uchar_t *slc_replyp = NULL; | |
1307 /* | |
1308 * The SLC reply consists of: IAC, SB, TELOPT_LINEMODE, LM_SLC, | |
1309 * SLC triplets[], IAC, SE. i.e. it has a 'wrapper' of 6 control characters. | |
1310 */ | |
1311 #define SLC_WRAPPER_SIZE 6 | |
1312 | |
1313 static void | |
1314 slc_export() | |
1315 { | |
1316 register struct spc *spcp; | |
1317 | |
1318 TerminalDefaultChars(); | |
1319 | |
1320 slc_start_reply(NSLC * 3); /* 3 bytes needed per triplet */ | |
1321 for (spcp = &spc_data[1]; spcp < &spc_data[NSLC+1]; spcp++) { | |
1322 if (spcp->mylevel != SLC_NOSUPPORT) { | |
1323 if (spcp->val == (cc_t)(_POSIX_VDISABLE)) | |
1324 spcp->flags = SLC_NOSUPPORT; | |
1325 else | |
1326 spcp->flags = spcp->mylevel; | |
1327 if (spcp->valp) | |
1328 spcp->val = *spcp->valp; | |
1329 slc_add_reply(spcp - spc_data, spcp->flags, spcp->val); | |
1330 } | |
1331 } | |
1332 slc_end_reply(); | |
1333 (void) slc_update(); | |
1334 setconnmode(1); /* Make sure the character values are set */ | |
1335 } | |
1336 | |
1337 static void | |
1338 slc(cp, len) | |
1339 register unsigned char *cp; | |
1340 int len; | |
1341 { | |
1342 register struct spc *spcp; | |
1343 register int func, level; | |
1344 | |
1345 slc_start_reply(len); | |
1346 | |
1347 for (; len >= 3; len -= 3, cp += 3) { | |
1348 | |
1349 func = cp[SLC_FUNC]; | |
1350 | |
1351 if (func == 0) { | |
1352 /* | |
1353 * Client side: always ignore 0 function. | |
1354 */ | |
1355 continue; | |
1356 } | |
1357 if (func > NSLC) { | |
1358 if ((cp[SLC_FLAGS] & SLC_LEVELBITS) != SLC_NOSUPPORT) | |
1359 slc_add_reply(func, SLC_NOSUPPORT, 0); | |
1360 continue; | |
1361 } | |
1362 | |
1363 spcp = &spc_data[func]; | |
1364 | |
1365 level = cp[SLC_FLAGS]&(SLC_LEVELBITS|SLC_ACK); | |
1366 | |
1367 if ((cp[SLC_VALUE] == (unsigned char)spcp->val) && | |
1368 ((level&SLC_LEVELBITS) == (spcp->flags&SLC_LEVELBITS))) { | |
1369 continue; | |
1370 } | |
1371 | |
1372 if (level == (SLC_DEFAULT|SLC_ACK)) { | |
1373 /* | |
1374 * This is an error condition, the SLC_ACK | |
1375 * bit should never be set for the SLC_DEFAULT | |
1376 * level. Our best guess to recover is to | |
1377 * ignore the SLC_ACK bit. | |
1378 */ | |
1379 cp[SLC_FLAGS] &= ~SLC_ACK; | |
1380 } | |
1381 | |
1382 if (level == ((spcp->flags&SLC_LEVELBITS)|SLC_ACK)) { | |
1383 spcp->val = (cc_t)cp[SLC_VALUE]; | |
1384 spcp->flags = cp[SLC_FLAGS]; /* include SLC_ACK */ | |
1385 continue; | |
1386 } | |
1387 | |
1388 level &= ~SLC_ACK; | |
1389 | |
1390 if (level <= (spcp->mylevel&SLC_LEVELBITS)) { | |
1391 spcp->flags = cp[SLC_FLAGS]|SLC_ACK; | |
1392 spcp->val = (cc_t)cp[SLC_VALUE]; | |
1393 } | |
1394 if (level == SLC_DEFAULT) { | |
1395 if ((spcp->mylevel&SLC_LEVELBITS) != SLC_DEFAULT) | |
1396 spcp->flags = spcp->mylevel; | |
1397 else | |
1398 spcp->flags = SLC_NOSUPPORT; | |
1399 } | |
1400 slc_add_reply(func, spcp->flags, spcp->val); | |
1401 } | |
1402 slc_end_reply(); | |
1403 if (slc_update()) | |
1404 setconnmode(1); /* set the new character values */ | |
1405 } | |
1406 | |
1407 void | |
1408 slc_check() | |
1409 { | |
1410 register struct spc *spcp; | |
1411 | |
1412 slc_start_reply(NSLC * 3); /* 3 bytes needed per triplet */ | |
1413 for (spcp = &spc_data[1]; spcp < &spc_data[NSLC+1]; spcp++) { | |
1414 if (spcp->valp && spcp->val != *spcp->valp) { | |
1415 spcp->val = *spcp->valp; | |
1416 if (spcp->val == (cc_t)(_POSIX_VDISABLE)) | |
1417 spcp->flags = SLC_NOSUPPORT; | |
1418 else | |
1419 spcp->flags = spcp->mylevel; | |
1420 slc_add_reply(spcp - spc_data, spcp->flags, spcp->val); | |
1421 } | |
1422 } | |
1423 slc_end_reply(); | |
1424 setconnmode(1); | |
1425 } | |
1426 | |
1427 static void | |
1428 slc_start_reply(size_t len) | |
1429 { | |
1430 /* | |
1431 * SLC triplets may contain escaped characters, allow for | |
1432 * worst case by allocating 2 bytes for every character. | |
1433 */ | |
1434 slc_reply = realloc(slc_reply, (len * 2) + SLC_WRAPPER_SIZE); | |
1435 if (slc_reply == NULL) { | |
1436 fprintf(stderr, "telnet: error allocating SLC reply memory\n"); | |
1437 return; | |
1438 } | |
1439 slc_replyp = slc_reply; | |
1440 *slc_replyp++ = IAC; | |
1441 *slc_replyp++ = SB; | |
1442 *slc_replyp++ = TELOPT_LINEMODE; | |
1443 *slc_replyp++ = LM_SLC; | |
1444 } | |
1445 | |
1446 static void | |
1447 slc_add_reply(unsigned char func, unsigned char flags, cc_t value) | |
1448 { | |
1449 if ((*slc_replyp++ = func) == IAC) | |
1450 *slc_replyp++ = IAC; | |
1451 if ((*slc_replyp++ = flags) == IAC) | |
1452 *slc_replyp++ = IAC; | |
1453 if ((*slc_replyp++ = (unsigned char)value) == IAC) | |
1454 *slc_replyp++ = IAC; | |
1455 } | |
1456 | |
1457 static void | |
1458 slc_end_reply() | |
1459 { | |
1460 register int len; | |
1461 | |
1462 *slc_replyp++ = IAC; | |
1463 *slc_replyp++ = SE; | |
1464 len = slc_replyp - slc_reply; | |
1465 if (len <= SLC_WRAPPER_SIZE) | |
1466 return; | |
1467 if (NETROOM() > len) { | |
1468 ring_supply_data(&netoring, slc_reply, slc_replyp - slc_reply); | |
1469 printsub('>', &slc_reply[2], slc_replyp - slc_reply - 2); | |
1470 } | |
1471 else | |
1472 (void) printf("telnet: not enough room in buffer for slc end " | |
1473 "reply\n"); | |
1474 } | |
1475 | |
1476 static int | |
1477 slc_update() | |
1478 { | |
1479 register struct spc *spcp; | |
1480 int need_update = 0; | |
1481 | |
1482 for (spcp = &spc_data[1]; spcp < &spc_data[NSLC+1]; spcp++) { | |
1483 if (!(spcp->flags&SLC_ACK)) | |
1484 continue; | |
1485 spcp->flags &= ~SLC_ACK; | |
1486 if (spcp->valp && (*spcp->valp != spcp->val)) { | |
1487 *spcp->valp = spcp->val; | |
1488 need_update = 1; | |
1489 } | |
1490 } | |
1491 return (need_update); | |
1492 } | |
1493 | |
1494 #ifdef OLD_ENVIRON | |
1495 #ifdef ENV_HACK | |
1496 /* | |
1497 * Earlier version of telnet/telnetd from the BSD code had | |
1498 * the definitions of VALUE and VAR reversed. To ensure | |
1499 * maximum interoperability, we assume that the server is | |
1500 * an older BSD server, until proven otherwise. The newer | |
1501 * BSD servers should be able to handle either definition, | |
1502 * so it is better to use the wrong values if we don't | |
1503 * know what type of server it is. | |
1504 */ | |
1505 int env_auto = 1; | |
1506 int old_env_var = OLD_ENV_VAR; | |
1507 int old_env_value = OLD_ENV_VALUE; | |
1508 #else | |
1509 #define old_env_var OLD_ENV_VAR | |
1510 #define old_env_value OLD_ENV_VALUE | |
1511 #endif | |
1512 #endif | |
1513 | |
1514 static void | |
1515 env_opt(buf, len) | |
1516 register unsigned char *buf; | |
1517 register int len; | |
1518 { | |
1519 register unsigned char *ep = 0, *epc = 0; | |
1520 register int i; | |
1521 | |
1522 switch (buf[0]&0xff) { | |
1523 case TELQUAL_SEND: | |
1524 env_opt_start(); | |
1525 if (len == 1) { | |
1526 env_opt_add(NULL); | |
1527 } else for (i = 1; i < len; i++) { | |
1528 switch (buf[i]&0xff) { | |
1529 #ifdef OLD_ENVIRON | |
1530 case OLD_ENV_VAR: | |
1531 #ifdef ENV_HACK | |
1532 if (telopt_environ == TELOPT_OLD_ENVIRON && | |
1533 env_auto) { | |
1534 /* Server has the same definitions */ | |
1535 old_env_var = OLD_ENV_VAR; | |
1536 old_env_value = OLD_ENV_VALUE; | |
1537 } | |
1538 /* FALLTHROUGH */ | |
1539 #endif | |
1540 case OLD_ENV_VALUE: | |
1541 /* | |
1542 * Although OLD_ENV_VALUE is not legal, we will | |
1543 * still recognize it, just in case it is an | |
1544 * old server that has VAR & VALUE mixed up... | |
1545 */ | |
1546 /* FALLTHROUGH */ | |
1547 #else | |
1548 case NEW_ENV_VAR: | |
1549 #endif | |
1550 case ENV_USERVAR: | |
1551 if (ep) { | |
1552 *epc = 0; | |
1553 env_opt_add(ep); | |
1554 } | |
1555 ep = epc = &buf[i+1]; | |
1556 break; | |
1557 case ENV_ESC: | |
1558 i++; | |
1559 /*FALLTHROUGH*/ | |
1560 default: | |
1561 if (epc) | |
1562 *epc++ = buf[i]; | |
1563 break; | |
1564 } | |
1565 } | |
1566 if (ep) { | |
1567 *epc = 0; | |
1568 env_opt_add(ep); | |
1569 } | |
1570 env_opt_end(1); | |
1571 break; | |
1572 | |
1573 case TELQUAL_IS: | |
1574 case TELQUAL_INFO: | |
1575 /* Ignore for now. We shouldn't get it anyway. */ | |
1576 break; | |
1577 | |
1578 default: | |
1579 break; | |
1580 } | |
1581 } | |
1582 | |
1583 static unsigned char *opt_reply; | |
1584 static unsigned char *opt_replyp; | |
1585 static unsigned char *opt_replyend; | |
1586 #define OPT_REPLY_INITIAL_SIZE 256 | |
1587 /* | |
1588 * The opt reply consists of: IAC, SB, telopt_environ, TELQUAL_IS, | |
1589 * value, IAC, SE. i.e. it has a 'wrapper' of 6 control characters. | |
1590 */ | |
1591 #define OPT_WRAPPER_SIZE 6 | |
1592 | |
1593 static void | |
1594 env_opt_start() | |
1595 { | |
1596 opt_reply = realloc(opt_reply, OPT_REPLY_INITIAL_SIZE); | |
1597 if (opt_reply == NULL) { | |
1598 (void) printf( | |
1599 "telnet: error allocating environment option memory\n"); | |
1600 opt_reply = opt_replyp = opt_replyend = NULL; | |
1601 return; | |
1602 } | |
1603 opt_replyp = opt_reply; | |
1604 opt_replyend = opt_reply + OPT_REPLY_INITIAL_SIZE; | |
1605 *opt_replyp++ = IAC; | |
1606 *opt_replyp++ = SB; | |
1607 *opt_replyp++ = telopt_environ; | |
1608 *opt_replyp++ = TELQUAL_IS; | |
1609 } | |
1610 | |
1611 void | |
1612 env_opt_start_info() | |
1613 { | |
1614 env_opt_start(); | |
1615 if (opt_replyp) | |
1616 opt_replyp[-1] = TELQUAL_INFO; | |
1617 } | |
1618 | |
1619 void | |
1620 env_opt_add(ep) | |
1621 register unsigned char *ep; | |
1622 { | |
1623 register unsigned char *vp, c; | |
1624 int opt_reply_size; | |
1625 int opt_reply_used; | |
1626 | |
1627 if (opt_reply == NULL) /* XXX */ | |
1628 return; /* XXX */ | |
1629 | |
1630 if (ep == NULL || *ep == '\0') { | |
1631 /* Send user defined variables first. */ | |
1632 (void) env_default(1, 0); | |
1633 while (ep = env_default(0, 0)) | |
1634 env_opt_add(ep); | |
1635 | |
1636 /* Now add the list of well know variables. */ | |
1637 (void) env_default(1, 1); | |
1638 while (ep = env_default(0, 1)) | |
1639 env_opt_add(ep); | |
1640 return; | |
1641 } | |
1642 vp = env_getvalue(ep); | |
1643 | |
1644 /* | |
1645 * Calculate space required for opt_reply and allocate more if required. | |
1646 * Assume worst case that every character is escaped, so needs 2 bytes. | |
1647 */ | |
1648 opt_reply_used = opt_replyp - opt_reply; /* existing contents */ | |
1649 opt_reply_size = opt_reply_used + OPT_WRAPPER_SIZE + | |
1650 (2 * (strlen((char *)ep))) + | |
1651 (vp == NULL ? 0 : (2 * strlen((char *)vp))); | |
1652 | |
1653 if (opt_reply_size > (opt_replyend - opt_reply)) { | |
1654 opt_reply = realloc(opt_reply, opt_reply_size); | |
1655 if (opt_reply == NULL) { | |
1656 (void) printf( | |
1657 "telnet: can't allocate environment option " | |
1658 "reply\n"); | |
1659 opt_reply = opt_replyp = opt_replyend = NULL; | |
1660 return; | |
1661 } | |
1662 opt_replyp = opt_reply + opt_reply_used; | |
1663 opt_replyend = opt_reply + opt_reply_size; | |
1664 } | |
1665 | |
1666 if (opt_welldefined((char *)ep)) | |
1667 #ifdef OLD_ENVIRON | |
1668 if (telopt_environ == TELOPT_OLD_ENVIRON) | |
1669 *opt_replyp++ = old_env_var; | |
1670 else | |
1671 #endif | |
1672 *opt_replyp++ = NEW_ENV_VAR; | |
1673 else | |
1674 *opt_replyp++ = ENV_USERVAR; | |
1675 for (;;) { | |
1676 while ((c = *ep++) != NULL) { | |
1677 switch (c&0xff) { | |
1678 case IAC: | |
1679 *opt_replyp++ = IAC; | |
1680 break; | |
1681 case NEW_ENV_VAR: | |
1682 case NEW_ENV_VALUE: | |
1683 case ENV_ESC: | |
1684 case ENV_USERVAR: | |
1685 *opt_replyp++ = ENV_ESC; | |
1686 break; | |
1687 } | |
1688 *opt_replyp++ = c; | |
1689 } | |
1690 if ((ep = vp) != NULL) { | |
1691 #ifdef OLD_ENVIRON | |
1692 if (telopt_environ == TELOPT_OLD_ENVIRON) | |
1693 *opt_replyp++ = old_env_value; | |
1694 else | |
1695 #endif | |
1696 *opt_replyp++ = NEW_ENV_VALUE; | |
1697 vp = NULL; | |
1698 } else | |
1699 break; | |
1700 } | |
1701 } | |
1702 | |
1703 int | |
1704 opt_welldefined(ep) | |
1705 char *ep; | |
1706 { | |
1707 if ((strcmp(ep, "USER") == 0) || | |
1708 (strcmp(ep, "DISPLAY") == 0) || | |
1709 (strcmp(ep, "PRINTER") == 0) || | |
1710 (strcmp(ep, "SYSTEMTYPE") == 0) || | |
1711 (strcmp(ep, "JOB") == 0) || | |
1712 (strcmp(ep, "ACCT") == 0)) | |
1713 return (1); | |
1714 return (0); | |
1715 } | |
1716 void | |
1717 env_opt_end(emptyok) | |
1718 register int emptyok; | |
1719 { | |
1720 register int len; | |
1721 | |
1722 len = opt_replyp - opt_reply + 2; | |
1723 if (emptyok || len > OPT_WRAPPER_SIZE) { | |
1724 *opt_replyp++ = IAC; | |
1725 *opt_replyp++ = SE; | |
1726 if (NETROOM() > len) { | |
1727 ring_supply_data(&netoring, opt_reply, len); | |
1728 printsub('>', &opt_reply[2], len - 2); | |
1729 } | |
1730 else | |
1731 (void) printf("telnet: not enough room in buffer for " | |
1732 "environment option end reply\n"); | |
1733 } | |
1734 if (opt_reply) { | |
1735 free(opt_reply); | |
1736 opt_reply = opt_replyp = opt_replyend = NULL; | |
1737 } | |
1738 } | |
1739 | |
1740 | |
1741 | |
1742 int | |
1743 telrcv() | |
1744 { | |
1745 register int c; | |
1746 register int scc; | |
1747 register unsigned char *sbp; | |
1748 int count; | |
1749 int returnValue = 0; | |
1750 int min_room = 0; | |
1751 | |
1752 scc = 0; | |
1753 count = 0; | |
1754 while (--min_room > 2 || (min_room = TTYROOM()) > 2) { | |
1755 if (scc == 0) { | |
1756 if (count) { | |
1757 ring_consumed(&netiring, count); | |
1758 returnValue = 1; | |
1759 count = 0; | |
1760 } | |
1761 sbp = netiring.consume; | |
1762 scc = ring_full_consecutive(&netiring); | |
1763 if (scc == 0) { | |
1764 /* No more data coming in */ | |
1765 break; | |
1766 } | |
1767 } | |
1768 | |
1769 c = *sbp++ & 0xff, scc--; count++; | |
1770 | |
1771 if (decrypt_input) | |
1772 c = (*decrypt_input)(c); | |
1773 | |
1774 switch (telrcv_state) { | |
1775 | |
1776 case TS_CR: | |
1777 telrcv_state = TS_DATA; | |
1778 if (c == '\0') { | |
1779 break; /* Ignore \0 after CR */ | |
1780 } else if ((c == '\n') && | |
1781 my_want_state_is_dont(TELOPT_ECHO) && !crmod) { | |
1782 TTYADD(c); | |
1783 break; | |
1784 } | |
1785 /* FALLTHROUGH */ | |
1786 | |
1787 case TS_DATA: | |
1788 if (c == IAC) { | |
1789 telrcv_state = TS_IAC; | |
1790 break; | |
1791 } | |
1792 /* | |
1793 * The 'crmod' hack (see following) is needed | |
1794 * since we can't * set CRMOD on output only. | |
1795 * Machines like MULTICS like to send \r without | |
1796 * \n; since we must turn off CRMOD to get proper | |
1797 * input, the mapping is done here (sigh). | |
1798 */ | |
1799 if ((c == '\r') && | |
1800 my_want_state_is_dont(TELOPT_BINARY)) { | |
1801 if (scc > 0) { | |
1802 c = *sbp&0xff; | |
1803 | |
1804 if (decrypt_input) | |
1805 c = (*decrypt_input)(c); | |
1806 | |
1807 if (c == 0) { | |
1808 sbp++, scc--; count++; | |
1809 /* a "true" CR */ | |
1810 TTYADD('\r'); | |
1811 } else if (my_want_state_is_dont( | |
1812 TELOPT_ECHO) && (c == '\n')) { | |
1813 sbp++, scc--; count++; | |
1814 TTYADD('\n'); | |
1815 } else { | |
1816 | |
1817 if (decrypt_input) | |
1818 (*decrypt_input)(-1); | |
1819 | |
1820 TTYADD('\r'); | |
1821 if (crmod) { | |
1822 TTYADD('\n'); | |
1823 } | |
1824 } | |
1825 } else { | |
1826 telrcv_state = TS_CR; | |
1827 TTYADD('\r'); | |
1828 if (crmod) { | |
1829 TTYADD('\n'); | |
1830 } | |
1831 } | |
1832 } else { | |
1833 TTYADD(c); | |
1834 } | |
1835 continue; | |
1836 | |
1837 case TS_IAC: | |
1838 process_iac: | |
1839 switch (c) { | |
1840 | |
1841 case WILL: | |
1842 telrcv_state = TS_WILL; | |
1843 continue; | |
1844 | |
1845 case WONT: | |
1846 telrcv_state = TS_WONT; | |
1847 continue; | |
1848 | |
1849 case DO: | |
1850 telrcv_state = TS_DO; | |
1851 continue; | |
1852 | |
1853 case DONT: | |
1854 telrcv_state = TS_DONT; | |
1855 continue; | |
1856 | |
1857 case DM: | |
1858 /* | |
1859 * We may have missed an urgent notification, | |
1860 * so make sure we flush whatever is in the | |
1861 * buffer currently. | |
1862 */ | |
1863 printoption("RCVD", IAC, DM); | |
1864 SYNCHing = 1; | |
1865 if (ttyflush(1) == -2) { | |
1866 /* This will not return. */ | |
1867 fatal_tty_error("write"); | |
1868 } | |
1869 SYNCHing = stilloob(); | |
1870 settimer(gotDM); | |
1871 break; | |
1872 | |
1873 case SB: | |
1874 SB_CLEAR(); | |
1875 telrcv_state = TS_SB; | |
1876 continue; | |
1877 | |
1878 case IAC: | |
1879 TTYADD(IAC); | |
1880 break; | |
1881 | |
1882 case NOP: | |
1883 case GA: | |
1884 default: | |
1885 printoption("RCVD", IAC, c); | |
1886 break; | |
1887 } | |
1888 telrcv_state = TS_DATA; | |
1889 continue; | |
1890 | |
1891 case TS_WILL: | |
1892 printoption("RCVD", WILL, c); | |
1893 willoption(c); | |
1894 telrcv_state = TS_DATA; | |
1895 continue; | |
1896 | |
1897 case TS_WONT: | |
1898 printoption("RCVD", WONT, c); | |
1899 wontoption(c); | |
1900 telrcv_state = TS_DATA; | |
1901 continue; | |
1902 | |
1903 case TS_DO: | |
1904 printoption("RCVD", DO, c); | |
1905 dooption(c); | |
1906 if (c == TELOPT_NAWS) { | |
1907 sendnaws(); | |
1908 } else if (c == TELOPT_LFLOW) { | |
1909 localflow = 1; | |
1910 setcommandmode(); | |
1911 setconnmode(0); | |
1912 } | |
1913 telrcv_state = TS_DATA; | |
1914 continue; | |
1915 | |
1916 case TS_DONT: | |
1917 printoption("RCVD", DONT, c); | |
1918 dontoption(c); | |
1919 flushline = 1; | |
1920 setconnmode(0); /* set new tty mode (maybe) */ | |
1921 telrcv_state = TS_DATA; | |
1922 continue; | |
1923 | |
1924 case TS_SB: | |
1925 if (c == IAC) { | |
1926 telrcv_state = TS_SE; | |
1927 } else { | |
1928 SB_ACCUM(c); | |
1929 } | |
1930 continue; | |
1931 | |
1932 case TS_SE: | |
1933 if (c != SE) { | |
1934 if (c != IAC) { | |
1935 /* | |
1936 * This is an error. We only expect to get | |
1937 * "IAC IAC" or "IAC SE". Several things may | |
1938 * have happend. An IAC was not doubled, the | |
1939 * IAC SE was left off, or another option got | |
1940 * inserted into the suboption are all possibilities. | |
1941 * If we assume that the IAC was not doubled, | |
1942 * and really the IAC SE was left off, we could | |
1943 * get into an infinate loop here. So, instead, | |
1944 * we terminate the suboption, and process the | |
1945 * partial suboption if we can. | |
1946 */ | |
1947 SB_ACCUM(IAC); | |
1948 SB_ACCUM(c); | |
1949 subpointer -= 2; | |
1950 SB_TERM(); | |
1951 | |
1952 printoption("In SUBOPTION processing, " | |
1953 "RCVD", IAC, c); | |
1954 suboption(); /* handle sub-option */ | |
1955 telrcv_state = TS_IAC; | |
1956 goto process_iac; | |
1957 } | |
1958 SB_ACCUM(c); | |
1959 telrcv_state = TS_SB; | |
1960 } else { | |
1961 SB_ACCUM(IAC); | |
1962 SB_ACCUM(SE); | |
1963 subpointer -= 2; | |
1964 SB_TERM(); | |
1965 suboption(); /* handle sub-option */ | |
1966 telrcv_state = TS_DATA; | |
1967 } | |
1968 } | |
1969 } | |
1970 if (count) | |
1971 ring_consumed(&netiring, count); | |
1972 return (returnValue||count); | |
1973 } | |
1974 | |
1975 static int bol = 1, local = 0; | |
1976 | |
1977 int | |
1978 rlogin_susp() | |
1979 { | |
1980 if (local) { | |
1981 local = 0; | |
1982 bol = 1; | |
1983 command(0, "z\n", 2); | |
1984 return (1); | |
1985 } | |
1986 return (0); | |
1987 } | |
1988 | |
1989 static int | |
1990 telsnd() | |
1991 { | |
1992 int tcc; | |
1993 int count; | |
1994 int returnValue = 0; | |
1995 unsigned char *tbp; | |
1996 | |
1997 tcc = 0; | |
1998 count = 0; | |
1999 while (NETROOM() > 2) { | |
2000 register int sc; | |
2001 register int c; | |
2002 | |
2003 if (tcc == 0) { | |
2004 if (count) { | |
2005 ring_consumed(&ttyiring, count); | |
2006 returnValue = 1; | |
2007 count = 0; | |
2008 } | |
2009 tbp = ttyiring.consume; | |
2010 tcc = ring_full_consecutive(&ttyiring); | |
2011 if (tcc == 0) { | |
2012 break; | |
2013 } | |
2014 } | |
2015 c = *tbp++ & 0xff, sc = strip(c), tcc--; count++; | |
2016 if (rlogin != _POSIX_VDISABLE) { | |
2017 if (bol) { | |
2018 bol = 0; | |
2019 if (sc == rlogin) { | |
2020 local = 1; | |
2021 continue; | |
2022 } | |
2023 } else if (local) { | |
2024 local = 0; | |
2025 if (sc == '.' || c == termEofChar) { | |
2026 bol = 1; | |
2027 command(0, "close\n", 6); | |
2028 continue; | |
2029 } | |
2030 if (sc == termSuspChar) { | |
2031 bol = 1; | |
2032 command(0, "z\n", 2); | |
2033 continue; | |
2034 } | |
2035 if (sc == escape) { | |
2036 command(0, (char *)tbp, tcc); | |
2037 bol = 1; | |
2038 count += tcc; | |
2039 tcc = 0; | |
2040 flushline = 1; | |
2041 break; | |
2042 } | |
2043 if (sc != rlogin) { | |
2044 ++tcc; | |
2045 --tbp; | |
2046 --count; | |
2047 c = sc = rlogin; | |
2048 } | |
2049 } | |
2050 if ((sc == '\n') || (sc == '\r')) | |
2051 bol = 1; | |
2052 } else if (sc == escape && escape_valid) { | |
2053 /* | |
2054 * Double escape is a pass through of a single | |
2055 * escape character. | |
2056 */ | |
2057 if (tcc && strip(*tbp) == escape) { | |
2058 tbp++; | |
2059 tcc--; | |
2060 count++; | |
2061 bol = 0; | |
2062 } else { | |
2063 command(0, (char *)tbp, tcc); | |
2064 bol = 1; | |
2065 count += tcc; | |
2066 tcc = 0; | |
2067 flushline = 1; | |
2068 break; | |
2069 } | |
2070 } else | |
2071 bol = 0; | |
2072 #ifdef KLUDGELINEMODE | |
2073 if (kludgelinemode && (globalmode&MODE_EDIT) && (sc == echoc)) { | |
2074 if (tcc > 0 && strip(*tbp) == echoc) { | |
2075 tcc--; tbp++; count++; | |
2076 } else { | |
2077 dontlecho = !dontlecho; | |
2078 settimer(echotoggle); | |
2079 setconnmode(0); | |
2080 flushline = 1; | |
2081 break; | |
2082 } | |
2083 } | |
2084 #endif | |
2085 if (MODE_LOCAL_CHARS(globalmode)) { | |
2086 if (TerminalSpecialChars(sc) == 0) { | |
2087 bol = 1; | |
2088 break; | |
2089 } | |
2090 } | |
2091 if (my_want_state_is_wont(TELOPT_BINARY)) { | |
2092 switch (c) { | |
2093 case '\n': | |
2094 /* | |
2095 * If we are in CRMOD mode (\r ==> \n) | |
2096 * on our local machine, then probably | |
2097 * a newline (unix) is CRLF (TELNET). | |
2098 */ | |
2099 if (MODE_LOCAL_CHARS(globalmode)) { | |
2100 NETADD('\r'); | |
2101 } | |
2102 NETADD('\n'); | |
2103 bol = flushline = 1; | |
2104 break; | |
2105 case '\r': | |
2106 if (!crlf) { | |
2107 NET2ADD('\r', '\0'); | |
2108 } else { | |
2109 NET2ADD('\r', '\n'); | |
2110 } | |
2111 bol = flushline = 1; | |
2112 break; | |
2113 case IAC: | |
2114 NET2ADD(IAC, IAC); | |
2115 break; | |
2116 default: | |
2117 NETADD(c); | |
2118 break; | |
2119 } | |
2120 } else if (c == IAC) { | |
2121 NET2ADD(IAC, IAC); | |
2122 } else { | |
2123 NETADD(c); | |
2124 } | |
2125 } | |
2126 if (count) | |
2127 ring_consumed(&ttyiring, count); | |
2128 return (returnValue||count); /* Non-zero if we did anything */ | |
2129 } | |
2130 | |
2131 /* | |
2132 * Scheduler() | |
2133 * | |
2134 * Try to do something. | |
2135 * | |
2136 * If we do something useful, return 1; else return 0. | |
2137 * | |
2138 */ | |
2139 | |
2140 | |
2141 int | |
2142 Scheduler(block) | |
2143 int block; /* should we block in the select ? */ | |
2144 { | |
2145 /* | |
2146 * One wants to be a bit careful about setting returnValue | |
2147 * to one, since a one implies we did some useful work, | |
2148 * and therefore probably won't be called to block next | |
2149 * time (TN3270 mode only). | |
2150 */ | |
2151 int returnValue; | |
2152 int netin, netout, netex, ttyin, ttyout; | |
2153 | |
2154 /* Decide which rings should be processed */ | |
2155 | |
2156 netout = ring_full_count(&netoring) && | |
2157 (flushline || | |
2158 (my_want_state_is_wont(TELOPT_LINEMODE) | |
2159 #ifdef KLUDGELINEMODE | |
2160 /* X */ && (!kludgelinemode || my_want_state_is_do(TELOPT_SGA)) | |
2161 #endif | |
2162 /* XXX */) || | |
2163 my_want_state_is_will(TELOPT_BINARY)); | |
2164 ttyout = ring_full_count(&ttyoring); | |
2165 | |
2166 ttyin = (ring_empty_count(&ttyiring) && !eof_pending); | |
2167 | |
2168 netin = !ISend && ring_empty_count(&netiring); | |
2169 | |
2170 netex = !SYNCHing; | |
2171 | |
2172 if (scheduler_lockout_tty) { | |
2173 ttyin = ttyout = 0; | |
2174 } | |
2175 | |
2176 /* Call to system code to process rings */ | |
2177 | |
2178 returnValue = process_rings(netin, netout, netex, ttyin, ttyout, | |
2179 !block); | |
2180 | |
2181 /* Now, look at the input rings, looking for work to do. */ | |
2182 | |
2183 if (ring_full_count(&ttyiring)) { | |
2184 returnValue |= telsnd(); | |
2185 } else { | |
2186 /* | |
2187 * If ttyiring is empty, check to see if there is a real EOF | |
2188 * pending. If so, we can maybe do the EOF write now. | |
2189 */ | |
2190 if (eof_pending) { | |
2191 eof_pending = 0; | |
2192 sendeof(); | |
2193 } | |
2194 } | |
2195 | |
2196 if (ring_full_count(&netiring)) { | |
2197 returnValue |= telrcv(); | |
2198 } | |
2199 return (returnValue); | |
2200 } | |
2201 | |
2202 /* | |
2203 * Select from tty and network... | |
2204 */ | |
2205 void | |
2206 telnet(user) | |
2207 char *user; | |
2208 { | |
2209 sys_telnet_init(); | |
2210 | |
2211 { | |
2212 static char local_host[MAXHOSTNAMELEN] = { 0 }; | |
2213 | |
2214 if (!local_host[0]) { | |
2215 (void) gethostname(local_host, sizeof (local_host)); | |
2216 local_host[sizeof (local_host)-1] = 0; | |
2217 } | |
2218 auth_encrypt_init(local_host, hostname, "TELNET"); | |
2219 auth_encrypt_user(user); | |
2220 } | |
2221 | |
2222 if (autologin) | |
2223 send_will(TELOPT_AUTHENTICATION, 1); | |
2224 | |
2225 if (telnetport || wantencryption) { | |
2226 send_do(TELOPT_ENCRYPT, 1); | |
2227 send_will(TELOPT_ENCRYPT, 1); | |
2228 } | |
2229 | |
2230 if (telnetport) { | |
2231 if (!reqd_linemode) | |
2232 send_do(TELOPT_SGA, 1); | |
2233 send_will(TELOPT_TTYPE, 1); | |
2234 send_will(TELOPT_NAWS, 1); | |
2235 send_will(TELOPT_TSPEED, 1); | |
2236 send_will(TELOPT_LFLOW, 1); | |
2237 if (!reqd_linemode) | |
2238 send_will(TELOPT_LINEMODE, 1); | |
2239 send_will(TELOPT_NEW_ENVIRON, 1); | |
2240 send_do(TELOPT_STATUS, 1); | |
2241 if (env_getvalue((unsigned char *)"DISPLAY")) | |
2242 send_will(TELOPT_XDISPLOC, 1); | |
2243 if (eight) | |
2244 tel_enter_binary(eight); | |
2245 } | |
2246 | |
2247 /* | |
2248 * Note: we assume a tie to the authentication option here. This | |
2249 * is necessary so that authentication fails, we don't spin | |
2250 * forever. | |
2251 */ | |
2252 if (wantencryption) { | |
2253 boolean_t printed_encrypt = B_FALSE; | |
2254 extern boolean_t auth_has_failed; | |
2255 time_t timeout = time(0) + 60; | |
2256 | |
2257 send_do(TELOPT_ENCRYPT, 1); | |
2258 send_will(TELOPT_ENCRYPT, 1); | |
2259 for (;;) { | |
2260 if (my_want_state_is_wont(TELOPT_AUTHENTICATION)) { | |
2261 (void) printf(gettext( | |
2262 "\nServer refused to negotiate " | |
2263 "authentication, which is required\n" | |
2264 "for encryption. Good-bye.\n\r")); | |
2265 Exit(EXIT_FAILURE); | |
2266 } | |
2267 if (auth_has_failed) { | |
2268 (void) printf(gettext( | |
2269 "\nAuthentication negotation has failed, " | |
2270 "which is required for\n" | |
2271 "encryption. Good-bye.\n\r")); | |
2272 Exit(EXIT_FAILURE); | |
2273 } | |
2274 if (my_want_state_is_dont(TELOPT_ENCRYPT) || | |
2275 my_want_state_is_wont(TELOPT_ENCRYPT)) { | |
2276 (void) printf(gettext( | |
2277 "\nServer refused to negotiate encryption. " | |
2278 "Good-bye.\n\r")); | |
2279 Exit(EXIT_FAILURE); | |
2280 } | |
2281 if (encrypt_is_encrypting()) | |
2282 break; | |
2283 | |
2284 if (time(0) > timeout) { | |
2285 (void) printf(gettext( | |
2286 "\nEncryption could not be enabled. " | |
2287 "Good-bye.\n\r")); | |
2288 Exit(EXIT_FAILURE); | |
2289 } | |
2290 if (printed_encrypt == B_FALSE) { | |
2291 printed_encrypt = B_TRUE; | |
2292 (void) printf(gettext( | |
2293 "Waiting for encryption to be negotiated...\n")); | |
2294 /* | |
2295 * Turn on MODE_TRAPSIG and then turn off localchars | |
2296 * so that ^C will cause telnet to exit. | |
2297 */ | |
2298 TerminalNewMode(getconnmode()|MODE_TRAPSIG); | |
2299 intr_waiting = 1; | |
2300 } | |
2301 if (intr_happened) { | |
2302 (void) printf(gettext( | |
2303 "\nUser requested an interrupt. Good-bye.\n\r")); | |
2304 Exit(EXIT_FAILURE); | |
2305 } | |
2306 telnet_spin(); | |
2307 } | |
2308 if (printed_encrypt) { | |
2309 (void) printf(gettext("done.\n")); | |
2310 intr_waiting = 0; | |
2311 setconnmode(0); | |
2312 } | |
2313 } | |
2314 | |
2315 for (;;) { | |
2316 int schedValue; | |
2317 | |
2318 while ((schedValue = Scheduler(0)) != 0) { | |
2319 if (schedValue == -1) { | |
2320 setcommandmode(); | |
2321 return; | |
2322 } | |
2323 } | |
2324 | |
2325 if (Scheduler(1) == -1) { | |
2326 setcommandmode(); | |
2327 return; | |
2328 } | |
2329 } | |
2330 } | |
2331 | |
2332 #if 0 /* XXX - this not being in is a bug */ | |
2333 /* | |
2334 * nextitem() | |
2335 * | |
2336 * Return the address of the next "item" in the TELNET data | |
2337 * stream. This will be the address of the next character if | |
2338 * the current address is a user data character, or it will | |
2339 * be the address of the character following the TELNET command | |
2340 * if the current address is a TELNET IAC ("I Am a Command") | |
2341 * character. | |
2342 */ | |
2343 | |
2344 static char * | |
2345 nextitem(current) | |
2346 char *current; | |
2347 { | |
2348 if ((*current&0xff) != IAC) { | |
2349 return (current+1); | |
2350 } | |
2351 switch (*(current+1)&0xff) { | |
2352 case DO: | |
2353 case DONT: | |
2354 case WILL: | |
2355 case WONT: | |
2356 return (current+3); | |
2357 case SB: /* loop forever looking for the SE */ | |
2358 { | |
2359 register char *look = current+2; | |
2360 | |
2361 for (;;) { | |
2362 if ((*look++&0xff) == IAC) { | |
2363 if ((*look++&0xff) == SE) { | |
2364 return (look); | |
2365 } | |
2366 } | |
2367 } | |
2368 } | |
2369 default: | |
2370 return (current+2); | |
2371 } | |
2372 } | |
2373 #endif /* 0 */ | |
2374 | |
2375 /* | |
2376 * netclear() | |
2377 * | |
2378 * We are about to do a TELNET SYNCH operation. Clear | |
2379 * the path to the network. | |
2380 * | |
2381 * Things are a bit tricky since we may have sent the first | |
2382 * byte or so of a previous TELNET command into the network. | |
2383 * So, we have to scan the network buffer from the beginning | |
2384 * until we are up to where we want to be. | |
2385 * | |
2386 * A side effect of what we do, just to keep things | |
2387 * simple, is to clear the urgent data pointer. The principal | |
2388 * caller should be setting the urgent data pointer AFTER calling | |
2389 * us in any case. | |
2390 */ | |
2391 | |
2392 static void | |
2393 netclear() | |
2394 { | |
2395 #if 0 /* XXX */ | |
2396 register char *thisitem, *next; | |
2397 char *good; | |
2398 #define wewant(p) ((nfrontp > p) && ((*p&0xff) == IAC) && \ | |
2399 ((*(p+1)&0xff) != EC) && ((*(p+1)&0xff) != EL)) | |
2400 | |
2401 thisitem = netobuf; | |
2402 | |
2403 while ((next = nextitem(thisitem)) <= netobuf.send) { | |
2404 thisitem = next; | |
2405 } | |
2406 | |
2407 /* Now, thisitem is first before/at boundary. */ | |
2408 | |
2409 good = netobuf; /* where the good bytes go */ | |
2410 | |
2411 while (netoring.add > thisitem) { | |
2412 if (wewant(thisitem)) { | |
2413 int length; | |
2414 | |
2415 next = thisitem; | |
2416 do { | |
2417 next = nextitem(next); | |
2418 } while (wewant(next) && (nfrontp > next)); | |
2419 length = next-thisitem; | |
2420 memcpy(good, thisitem, length); | |
2421 good += length; | |
2422 thisitem = next; | |
2423 } else { | |
2424 thisitem = nextitem(thisitem); | |
2425 } | |
2426 } | |
2427 | |
2428 #endif /* 0 */ | |
2429 } | |
2430 | |
2431 /* | |
2432 * These routines add various telnet commands to the data stream. | |
2433 */ | |
2434 | |
2435 /* | |
2436 * doflush - Send do timing mark (for network connection flush) & then | |
2437 * get rid of anything in the output buffer. Return -1 if there was a | |
2438 * non-EWOULDBLOCK error on the tty flush, and otherwise return 0. | |
2439 */ | |
2440 static int | |
2441 doflush() | |
2442 { | |
2443 NET2ADD(IAC, DO); | |
2444 NETADD(TELOPT_TM); | |
2445 flushline = 1; | |
2446 flushout = 1; | |
2447 | |
2448 /* Drop pending tty output */ | |
2449 if (ttyflush(1) == -2) | |
2450 return (-1); | |
2451 | |
2452 /* do printoption AFTER flush, otherwise the output gets tossed... */ | |
2453 printoption("SENT", DO, TELOPT_TM); | |
2454 return (0); | |
2455 } | |
2456 | |
2457 int | |
2458 xmitAO() | |
2459 { | |
2460 NET2ADD(IAC, AO); | |
2461 printoption("SENT", IAC, AO); | |
2462 if (autoflush) { | |
2463 if (doflush() == -1) | |
2464 return (-1); | |
2465 } | |
2466 return (0); | |
2467 } | |
2468 | |
2469 | |
2470 void | |
2471 xmitEL() | |
2472 { | |
2473 NET2ADD(IAC, EL); | |
2474 printoption("SENT", IAC, EL); | |
2475 } | |
2476 | |
2477 void | |
2478 xmitEC() | |
2479 { | |
2480 NET2ADD(IAC, EC); | |
2481 printoption("SENT", IAC, EC); | |
2482 } | |
2483 | |
2484 | |
2485 int | |
2486 dosynch() | |
2487 { | |
2488 netclear(); /* clear the path to the network */ | |
2489 NETADD(IAC); | |
2490 setneturg(); | |
2491 NETADD(DM); | |
2492 printoption("SENT", IAC, DM); | |
2493 return (1); | |
2494 } | |
2495 | |
2496 int want_status_response = 0; | |
2497 | |
2498 int | |
2499 get_status() | |
2500 { | |
2501 unsigned char tmp[16]; | |
2502 register unsigned char *cp; | |
2503 | |
2504 if (my_want_state_is_dont(TELOPT_STATUS)) { | |
2505 (void) printf("Remote side does not support STATUS option\n"); | |
2506 return (0); | |
2507 } | |
2508 cp = tmp; | |
2509 | |
2510 *cp++ = IAC; | |
2511 *cp++ = SB; | |
2512 *cp++ = TELOPT_STATUS; | |
2513 *cp++ = TELQUAL_SEND; | |
2514 *cp++ = IAC; | |
2515 *cp++ = SE; | |
2516 if (NETROOM() >= cp - tmp) { | |
2517 ring_supply_data(&netoring, tmp, cp-tmp); | |
2518 printsub('>', tmp+2, cp - tmp - 2); | |
2519 } | |
2520 ++want_status_response; | |
2521 return (1); | |
2522 } | |
2523 | |
2524 void | |
2525 intp() | |
2526 { | |
2527 NET2ADD(IAC, IP); | |
2528 printoption("SENT", IAC, IP); | |
2529 flushline = 1; | |
2530 if (autoflush) { | |
2531 /* Ignore return as we're ending off anyway. */ | |
2532 (void) doflush(); | |
2533 } | |
2534 if (autosynch) { | |
2535 (void) dosynch(); | |
2536 } | |
2537 } | |
2538 | |
2539 int | |
2540 sendbrk() | |
2541 { | |
2542 NET2ADD(IAC, BREAK); | |
2543 printoption("SENT", IAC, BREAK); | |
2544 flushline = 1; | |
2545 if (autoflush) { | |
2546 if (doflush() == -1) | |
2547 return (-1); | |
2548 } | |
2549 if (autosynch) { | |
2550 (void) dosynch(); | |
2551 } | |
2552 return (0); | |
2553 } | |
2554 | |
2555 void | |
2556 sendabort() | |
2557 { | |
2558 NET2ADD(IAC, ABORT); | |
2559 printoption("SENT", IAC, ABORT); | |
2560 flushline = 1; | |
2561 if (autoflush) { | |
2562 /* | |
2563 * Since sendabort() gets called while aborting, | |
2564 * ignore the doflush() return | |
2565 */ | |
2566 (void) doflush(); | |
2567 } | |
2568 if (autosynch) { | |
2569 (void) dosynch(); | |
2570 } | |
2571 } | |
2572 | |
2573 void | |
2574 sendsusp() | |
2575 { | |
2576 NET2ADD(IAC, SUSP); | |
2577 printoption("SENT", IAC, SUSP); | |
2578 flushline = 1; | |
2579 if (autoflush) { | |
2580 if (doflush() == -1) { | |
2581 /* The following will not return. */ | |
2582 fatal_tty_error("write"); | |
2583 } | |
2584 } | |
2585 if (autosynch) { | |
2586 (void) dosynch(); | |
2587 } | |
2588 } | |
2589 | |
2590 static void | |
2591 sendeof() | |
2592 { | |
2593 NET2ADD(IAC, xEOF); | |
2594 printoption("SENT", IAC, xEOF); | |
2595 } | |
2596 | |
2597 /* | |
2598 * Send a window size update to the remote system. | |
2599 */ | |
2600 | |
2601 void | |
2602 sendnaws() | |
2603 { | |
2604 unsigned short rows, cols; | |
2605 unsigned char tmp[16]; | |
2606 register unsigned char *cp; | |
2607 | |
2608 if (my_state_is_wont(TELOPT_NAWS)) | |
2609 return; | |
2610 | |
2611 #define PUTSHORT(cp, x) { if ((*cp++ = ((x)>>8)&0xff) == IAC) *cp++ = IAC; \ | |
2612 if ((*cp++ = ((x))&0xff) == IAC) *cp++ = IAC; } | |
2613 | |
2614 if (TerminalWindowSize(&rows, &cols) == 0) { /* Failed */ | |
2615 return; | |
2616 } | |
2617 | |
2618 cp = tmp; | |
2619 | |
2620 *cp++ = IAC; | |
2621 *cp++ = SB; | |
2622 *cp++ = TELOPT_NAWS; | |
2623 PUTSHORT(cp, cols); | |
2624 PUTSHORT(cp, rows); | |
2625 *cp++ = IAC; | |
2626 *cp++ = SE; | |
2627 if (NETROOM() >= cp - tmp) { | |
2628 ring_supply_data(&netoring, tmp, cp-tmp); | |
2629 printsub('>', tmp+2, cp - tmp - 2); | |
2630 } | |
2631 } | |
2632 | |
2633 void | |
2634 tel_enter_binary(rw) | |
2635 int rw; | |
2636 { | |
2637 if (rw&1) | |
2638 send_do(TELOPT_BINARY, 1); | |
2639 if (rw&2) | |
2640 send_will(TELOPT_BINARY, 1); | |
2641 } | |
2642 | |
2643 void | |
2644 tel_leave_binary(rw) | |
2645 int rw; | |
2646 { | |
2647 if (rw&1) | |
2648 send_dont(TELOPT_BINARY, 1); | |
2649 if (rw&2) | |
2650 send_wont(TELOPT_BINARY, 1); | |
2651 } |