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vfs: check userland buffers before reading them.
[haiku.git] / src / bin / network / telnet / telnet.c
blobc62cc4d0a413a19b29cb03ed02d92b5ee69bd518
1 /*
2 * Copyright (c) 1988, 1990, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34 #if 0
35 #ifndef lint
36 static const char sccsid[] = "@(#)telnet.c 8.4 (Berkeley) 5/30/95";
37 #endif
38 #endif
39 #include <sys/cdefs.h>
40 __FBSDID("$FreeBSD: src/contrib/telnet/telnet/telnet.c,v 1.16 2005/03/28 14:45:12 nectar Exp $");
41
42 #include <sys/types.h>
43
44 /* By the way, we need to include curses.h before telnet.h since,
45 * among other things, telnet.h #defines 'DO', which is a variable
46 * declared in curses.h.
47 */
48
49 #include <ctype.h>
50 #include <curses.h>
51 #include <signal.h>
52 #include <stdlib.h>
53 #include <term.h>
54 #include <unistd.h>
55 #include <arpa/telnet.h>
56
57 #include "ring.h"
58
59 #include "defines.h"
60 #include "externs.h"
61 #include "types.h"
62 #include "general.h"
63
64 #ifdef AUTHENTICATION
65 #include <libtelnet/auth.h>
66 #endif
67 #ifdef ENCRYPTION
68 #include <libtelnet/encrypt.h>
69 #endif
70 #include <libtelnet/misc.h>
71 \f
72 #define strip(x) ((my_want_state_is_wont(TELOPT_BINARY)) ? ((x)&0x7f) : (x))
73
74 static unsigned char subbuffer[SUBBUFSIZE],
75 *subpointer, *subend; /* buffer for sub-options */
76 #define SB_CLEAR() subpointer = subbuffer;
77 #define SB_TERM() { subend = subpointer; SB_CLEAR(); }
78 #define SB_ACCUM(c) if (subpointer < (subbuffer+sizeof subbuffer)) { \
79 *subpointer++ = (c); \
80 }
81
82 #define SB_GET() ((*subpointer++)&0xff)
83 #define SB_PEEK() ((*subpointer)&0xff)
84 #define SB_EOF() (subpointer >= subend)
85 #define SB_LEN() (subend - subpointer)
86
87 char options[256]; /* The combined options */
88 char do_dont_resp[256];
89 char will_wont_resp[256];
90
91 int
92 eight = 0,
93 autologin = 0, /* Autologin anyone? */
94 skiprc = 0,
95 connected,
96 showoptions,
97 ISend, /* trying to send network data in */
98 telnet_debug = 0,
99 crmod,
100 netdata, /* Print out network data flow */
101 crlf, /* Should '\r' be mapped to <CR><LF> (or <CR><NUL>)? */
102 telnetport,
103 SYNCHing, /* we are in TELNET SYNCH mode */
104 flushout, /* flush output */
105 autoflush = 0, /* flush output when interrupting? */
106 autosynch, /* send interrupt characters with SYNCH? */
107 localflow, /* we handle flow control locally */
108 restartany, /* if flow control enabled, restart on any character */
109 localchars, /* we recognize interrupt/quit */
110 donelclchars, /* the user has set "localchars" */
111 donebinarytoggle, /* the user has put us in binary */
112 dontlecho, /* do we suppress local echoing right now? */
113 globalmode,
114 doaddrlookup = 1, /* do a reverse address lookup? */
115 clienteof = 0;
116
117 char *prompt = 0;
118 #ifdef ENCRYPTION
119 char *line; /* hack around breakage in sra.c :-( !! */
120 #endif
121
122 cc_t escape;
123 cc_t rlogin;
124 #ifdef KLUDGELINEMODE
125 cc_t echoc;
126 #endif
127
128 /*
129 * Telnet receiver states for fsm
130 */
131 #define TS_DATA 0
132 #define TS_IAC 1
133 #define TS_WILL 2
134 #define TS_WONT 3
135 #define TS_DO 4
136 #define TS_DONT 5
137 #define TS_CR 6
138 #define TS_SB 7 /* sub-option collection */
139 #define TS_SE 8 /* looking for sub-option end */
140
141 static int telrcv_state;
142 #ifdef OLD_ENVIRON
143 unsigned char telopt_environ = TELOPT_NEW_ENVIRON;
144 #else
145 # define telopt_environ TELOPT_NEW_ENVIRON
146 #endif
147
148 jmp_buf toplevel;
149 jmp_buf peerdied;
150
151 int flushline;
152 int linemode;
153
154 #ifdef KLUDGELINEMODE
155 int kludgelinemode = 1;
156 #endif
157
158 static int is_unique(char *, char **, char **);
159
160 /*
161 * The following are some clocks used to decide how to interpret
162 * the relationship between various variables.
163 */
164
165 Clocks clocks;
166 \f
167 /*
168 * Initialize telnet environment.
169 */
170
171 void
172 init_telnet(void)
173 {
174 env_init();
175
176 SB_CLEAR();
177 ClearArray(options);
178
179 connected = ISend = localflow = donebinarytoggle = 0;
180 #ifdef AUTHENTICATION
181 #ifdef ENCRYPTION
182 auth_encrypt_connect(connected);
183 #endif
184 #endif
185 restartany = -1;
186
187 SYNCHing = 0;
188
189 /* Don't change NetTrace */
190
191 escape = CONTROL(']');
192 rlogin = _POSIX_VDISABLE;
193 #ifdef KLUDGELINEMODE
194 echoc = CONTROL('E');
195 #endif
196
197 flushline = 1;
198 telrcv_state = TS_DATA;
199 }
200 \f
201
202 /*
203 * These routines are in charge of sending option negotiations
204 * to the other side.
205 *
206 * The basic idea is that we send the negotiation if either side
207 * is in disagreement as to what the current state should be.
208 */
209
210 void
211 send_do(int c, int init)
212 {
213 if (init) {
214 if (((do_dont_resp[c] == 0) && my_state_is_do(c)) ||
215 my_want_state_is_do(c))
216 return;
217 set_my_want_state_do(c);
218 do_dont_resp[c]++;
219 }
220 if (telnetport < 0)
221 return;
222 NET2ADD(IAC, DO);
223 NETADD(c);
224 printoption("SENT", DO, c);
225 }
226
227 void
228 send_dont(int c, int init)
229 {
230 if (init) {
231 if (((do_dont_resp[c] == 0) && my_state_is_dont(c)) ||
232 my_want_state_is_dont(c))
233 return;
234 set_my_want_state_dont(c);
235 do_dont_resp[c]++;
236 }
237 if (telnetport < 0)
238 return;
239 NET2ADD(IAC, DONT);
240 NETADD(c);
241 printoption("SENT", DONT, c);
242 }
243
244 void
245 send_will(int c, int init)
246 {
247 if (init) {
248 if (((will_wont_resp[c] == 0) && my_state_is_will(c)) ||
249 my_want_state_is_will(c))
250 return;
251 set_my_want_state_will(c);
252 will_wont_resp[c]++;
253 }
254 if (telnetport < 0)
255 return;
256 NET2ADD(IAC, WILL);
257 NETADD(c);
258 printoption("SENT", WILL, c);
259 }
260
261 void
262 send_wont(int c, int init)
263 {
264 if (init) {
265 if (((will_wont_resp[c] == 0) && my_state_is_wont(c)) ||
266 my_want_state_is_wont(c))
267 return;
268 set_my_want_state_wont(c);
269 will_wont_resp[c]++;
270 }
271 if (telnetport < 0)
272 return;
273 NET2ADD(IAC, WONT);
274 NETADD(c);
275 printoption("SENT", WONT, c);
276 }
277
278 void
279 willoption(int option)
280 {
281 int new_state_ok = 0;
282
283 if (do_dont_resp[option]) {
284 --do_dont_resp[option];
285 if (do_dont_resp[option] && my_state_is_do(option))
286 --do_dont_resp[option];
287 }
288
289 if ((do_dont_resp[option] == 0) && my_want_state_is_dont(option)) {
290
291 switch (option) {
292
293 case TELOPT_ECHO:
294 case TELOPT_BINARY:
295 case TELOPT_SGA:
296 settimer(modenegotiated);
297 /* FALLTHROUGH */
298 case TELOPT_STATUS:
299 #ifdef AUTHENTICATION
300 case TELOPT_AUTHENTICATION:
301 #endif
302 #ifdef ENCRYPTION
303 case TELOPT_ENCRYPT:
304 #endif /* ENCRYPTION */
305 new_state_ok = 1;
306 break;
307
308 case TELOPT_TM:
309 if (flushout)
310 flushout = 0;
311 /*
312 * Special case for TM. If we get back a WILL,
313 * pretend we got back a WONT.
314 */
315 set_my_want_state_dont(option);
316 set_my_state_dont(option);
317 return; /* Never reply to TM will's/wont's */
318
319 case TELOPT_LINEMODE:
320 default:
321 break;
322 }
323
324 if (new_state_ok) {
325 set_my_want_state_do(option);
326 send_do(option, 0);
327 setconnmode(0); /* possibly set new tty mode */
328 } else {
329 do_dont_resp[option]++;
330 send_dont(option, 0);
331 }
332 }
333 set_my_state_do(option);
334 #ifdef ENCRYPTION
335 if (option == TELOPT_ENCRYPT)
336 encrypt_send_support();
337 #endif /* ENCRYPTION */
338 }
339
340 void
341 wontoption(int option)
342 {
343 if (do_dont_resp[option]) {
344 --do_dont_resp[option];
345 if (do_dont_resp[option] && my_state_is_dont(option))
346 --do_dont_resp[option];
347 }
348
349 if ((do_dont_resp[option] == 0) && my_want_state_is_do(option)) {
350
351 switch (option) {
352
353 #ifdef KLUDGELINEMODE
354 case TELOPT_SGA:
355 if (!kludgelinemode)
356 break;
357 /* FALLTHROUGH */
358 #endif
359 case TELOPT_ECHO:
360 settimer(modenegotiated);
361 break;
362
363 case TELOPT_TM:
364 if (flushout)
365 flushout = 0;
366 set_my_want_state_dont(option);
367 set_my_state_dont(option);
368 return; /* Never reply to TM will's/wont's */
369
370 default:
371 break;
372 }
373 set_my_want_state_dont(option);
374 if (my_state_is_do(option))
375 send_dont(option, 0);
376 setconnmode(0); /* Set new tty mode */
377 } else if (option == TELOPT_TM) {
378 /*
379 * Special case for TM.
380 */
381 if (flushout)
382 flushout = 0;
383 set_my_want_state_dont(option);
384 }
385 set_my_state_dont(option);
386 }
387
388 static void
389 dooption(int option)
390 {
391 int new_state_ok = 0;
392
393 if (will_wont_resp[option]) {
394 --will_wont_resp[option];
395 if (will_wont_resp[option] && my_state_is_will(option))
396 --will_wont_resp[option];
397 }
398
399 if (will_wont_resp[option] == 0) {
400 if (my_want_state_is_wont(option)) {
401
402 switch (option) {
403
404 case TELOPT_TM:
405 /*
406 * Special case for TM. We send a WILL, but pretend
407 * we sent WONT.
408 */
409 send_will(option, 0);
410 set_my_want_state_wont(TELOPT_TM);
411 set_my_state_wont(TELOPT_TM);
412 return;
413
414 case TELOPT_BINARY: /* binary mode */
415 case TELOPT_NAWS: /* window size */
416 case TELOPT_TSPEED: /* terminal speed */
417 case TELOPT_LFLOW: /* local flow control */
418 case TELOPT_TTYPE: /* terminal type option */
419 case TELOPT_SGA: /* no big deal */
420 #ifdef ENCRYPTION
421 case TELOPT_ENCRYPT: /* encryption variable option */
422 #endif /* ENCRYPTION */
423 new_state_ok = 1;
424 break;
425
426 case TELOPT_NEW_ENVIRON: /* New environment variable option */
427 #ifdef OLD_ENVIRON
428 if (my_state_is_will(TELOPT_OLD_ENVIRON))
429 send_wont(TELOPT_OLD_ENVIRON, 1); /* turn off the old */
430 goto env_common;
431 case TELOPT_OLD_ENVIRON: /* Old environment variable option */
432 if (my_state_is_will(TELOPT_NEW_ENVIRON))
433 break; /* Don't enable if new one is in use! */
434 env_common:
435 telopt_environ = option;
436 #endif
437 new_state_ok = 1;
438 break;
439
440 #ifdef AUTHENTICATION
441 case TELOPT_AUTHENTICATION:
442 if (autologin)
443 new_state_ok = 1;
444 break;
445 #endif
446
447 case TELOPT_XDISPLOC: /* X Display location */
448 if (env_getvalue("DISPLAY"))
449 new_state_ok = 1;
450 break;
451
452 case TELOPT_LINEMODE:
453 #ifdef KLUDGELINEMODE
454 kludgelinemode = 0;
455 send_do(TELOPT_SGA, 1);
456 #endif
457 set_my_want_state_will(TELOPT_LINEMODE);
458 send_will(option, 0);
459 set_my_state_will(TELOPT_LINEMODE);
460 slc_init();
461 return;
462
463 case TELOPT_ECHO: /* We're never going to echo... */
464 default:
465 break;
466 }
467
468 if (new_state_ok) {
469 set_my_want_state_will(option);
470 send_will(option, 0);
471 setconnmode(0); /* Set new tty mode */
472 } else {
473 will_wont_resp[option]++;
474 send_wont(option, 0);
475 }
476 } else {
477 /*
478 * Handle options that need more things done after the
479 * other side has acknowledged the option.
480 */
481 switch (option) {
482 case TELOPT_LINEMODE:
483 #ifdef KLUDGELINEMODE
484 kludgelinemode = 0;
485 send_do(TELOPT_SGA, 1);
486 #endif
487 set_my_state_will(option);
488 slc_init();
489 send_do(TELOPT_SGA, 0);
490 return;
491 }
492 }
493 }
494 set_my_state_will(option);
495 }
496
497 static void
498 dontoption(int option)
499 {
500
501 if (will_wont_resp[option]) {
502 --will_wont_resp[option];
503 if (will_wont_resp[option] && my_state_is_wont(option))
504 --will_wont_resp[option];
505 }
506
507 if ((will_wont_resp[option] == 0) && my_want_state_is_will(option)) {
508 switch (option) {
509 case TELOPT_LINEMODE:
510 linemode = 0; /* put us back to the default state */
511 break;
512 #ifdef OLD_ENVIRON
513 case TELOPT_NEW_ENVIRON:
514 /*
515 * The new environ option wasn't recognized, try
516 * the old one.
517 */
518 send_will(TELOPT_OLD_ENVIRON, 1);
519 telopt_environ = TELOPT_OLD_ENVIRON;
520 break;
521 #endif
522 }
523 /* we always accept a DONT */
524 set_my_want_state_wont(option);
525 if (my_state_is_will(option))
526 send_wont(option, 0);
527 setconnmode(0); /* Set new tty mode */
528 }
529 set_my_state_wont(option);
530 }
531
532 /*
533 * Given a buffer returned by tgetent(), this routine will turn
534 * the pipe separated list of names in the buffer into an array
535 * of pointers to null terminated names. We toss out any bad,
536 * duplicate, or verbose names (names with spaces).
537 */
538
539 static const char *name_unknown = "UNKNOWN";
540 static const char *unknown[] = { NULL, NULL };
541
542 static const char **
543 mklist(char *buf, char *name)
544 {
545 int n;
546 char c, *cp, **argvp, *cp2, **argv, **avt;
547
548 if (name) {
549 if (strlen(name) > 40) {
550 name = 0;
551 unknown[0] = name_unknown;
552 } else {
553 unknown[0] = name;
554 upcase(name);
555 }
556 } else
557 unknown[0] = name_unknown;
558 /*
559 * Count up the number of names.
560 */
561 for (n = 1, cp = buf; *cp && *cp != ':'; cp++) {
562 if (*cp == '|')
563 n++;
564 }
565 /*
566 * Allocate an array to put the name pointers into
567 */
568 argv = (char **)malloc((n+3)*sizeof(char *));
569 if (argv == 0)
570 return(unknown);
571
572 /*
573 * Fill up the array of pointers to names.
574 */
575 *argv = 0;
576 argvp = argv+1;
577 n = 0;
578 for (cp = cp2 = buf; (c = *cp); cp++) {
579 if (c == '|' || c == ':') {
580 *cp++ = '\0';
581 /*
582 * Skip entries that have spaces or are over 40
583 * characters long. If this is our environment
584 * name, then put it up front. Otherwise, as
585 * long as this is not a duplicate name (case
586 * insensitive) add it to the list.
587 */
588 if (n || (cp - cp2 > 41))
589 ;
590 else if (name && (strncasecmp(name, cp2, cp-cp2) == 0))
591 *argv = cp2;
592 else if (is_unique(cp2, argv+1, argvp))
593 *argvp++ = cp2;
594 if (c == ':')
595 break;
596 /*
597 * Skip multiple delimiters. Reset cp2 to
598 * the beginning of the next name. Reset n,
599 * the flag for names with spaces.
600 */
601 while ((c = *cp) == '|')
602 cp++;
603 cp2 = cp;
604 n = 0;
605 }
606 /*
607 * Skip entries with spaces or non-ascii values.
608 * Convert lower case letters to upper case.
609 */
610 if ((c == ' ') || !isascii(c))
611 n = 1;
612 else if (islower(c))
613 *cp = toupper(c);
614 }
615
616 /*
617 * Check for an old V6 2 character name. If the second
618 * name points to the beginning of the buffer, and is
619 * only 2 characters long, move it to the end of the array.
620 */
621 if ((argv[1] == buf) && (strlen(argv[1]) == 2)) {
622 --argvp;
623 for (avt = &argv[1]; avt < argvp; avt++)
624 *avt = *(avt+1);
625 *argvp++ = buf;
626 }
627
628 /*
629 * Duplicate last name, for TTYPE option, and null
630 * terminate the array. If we didn't find a match on
631 * our terminal name, put that name at the beginning.
632 */
633 cp = *(argvp-1);
634 *argvp++ = cp;
635 *argvp = 0;
636
637 if (*argv == 0) {
638 if (name)
639 *argv = name;
640 else {
641 --argvp;
642 for (avt = argv; avt < argvp; avt++)
643 *avt = *(avt+1);
644 }
645 }
646 if (*argv)
647 return((const char **)argv);
648 else
649 return(unknown);
650 }
651
652 static int
653 is_unique(char *name, char **as, char **ae)
654 {
655 char **ap;
656 int n;
657
658 n = strlen(name) + 1;
659 for (ap = as; ap < ae; ap++)
660 if (strncasecmp(*ap, name, n) == 0)
661 return(0);
662 return (1);
663 }
664
665 #ifdef TERMCAP
666 char termbuf[1024];
667
668 /*ARGSUSED*/
669 static int
670 setupterm(char *tname, int fd, int *errp)
671 {
672 if (tgetent(termbuf, tname) == 1) {
673 termbuf[1023] = '\0';
674 if (errp)
675 *errp = 1;
676 return(0);
677 }
678 if (errp)
679 *errp = 0;
680 return(-1);
681 }
682 #else
683 #define termbuf ttytype
684 extern char ttytype[];
685 #endif
686
687 int resettermname = 1;
688
689 static const char *
690 gettermname(void)
691 {
692 char *tname;
693 static const char **tnamep = 0;
694 static const char **next;
695 int err;
696
697 if (resettermname) {
698 resettermname = 0;
699 if (tnamep && tnamep != unknown)
700 free(tnamep);
701 if ((tname = env_getvalue("TERM")) &&
702 (setupterm(tname, 1, &err) == 0)) {
703 tnamep = mklist(termbuf, tname);
704 } else {
705 if (tname && (strlen(tname) <= 40)) {
706 unknown[0] = tname;
707 upcase(tname);
708 } else
709 unknown[0] = name_unknown;
710 tnamep = unknown;
711 }
712 next = tnamep;
713 }
714 if (*next == 0)
715 next = tnamep;
716 return(*next++);
717 }
718 /*
719 * suboption()
720 *
721 * Look at the sub-option buffer, and try to be helpful to the other
722 * side.
723 *
724 * Currently we recognize:
725 *
726 * Terminal type, send request.
727 * Terminal speed (send request).
728 * Local flow control (is request).
729 * Linemode
730 */
731
732 static void
733 suboption(void)
734 {
735 unsigned char subchar;
736
737 printsub('<', subbuffer, SB_LEN()+2);
738 switch (subchar = SB_GET()) {
739 case TELOPT_TTYPE:
740 if (my_want_state_is_wont(TELOPT_TTYPE))
741 return;
742 if (SB_EOF() || SB_GET() != TELQUAL_SEND) {
743 return;
744 } else {
745 const char *name;
746 unsigned char temp[50];
747 int len;
748
749 name = gettermname();
750 len = strlen(name) + 4 + 2;
751 if (len < NETROOM()) {
752 sprintf(temp, "%c%c%c%c%s%c%c", IAC, SB, TELOPT_TTYPE,
753 TELQUAL_IS, name, IAC, SE);
754 ring_supply_data(&netoring, temp, len);
755 printsub('>', &temp[2], len-2);
756 } else {
757 ExitString("No room in buffer for terminal type.\n", 1);
758 /*NOTREACHED*/
759 }
760 }
761 break;
762 case TELOPT_TSPEED:
763 if (my_want_state_is_wont(TELOPT_TSPEED))
764 return;
765 if (SB_EOF())
766 return;
767 if (SB_GET() == TELQUAL_SEND) {
768 long ospeed, ispeed;
769 unsigned char temp[50];
770 int len;
771
772 TerminalSpeeds(&ispeed, &ospeed);
773
774 sprintf((char *)temp, "%c%c%c%c%ld,%ld%c%c", IAC, SB, TELOPT_TSPEED,
775 TELQUAL_IS, ospeed, ispeed, IAC, SE);
776 len = strlen((char *)temp+4) + 4; /* temp[3] is 0 ... */
777
778 if (len < NETROOM()) {
779 ring_supply_data(&netoring, temp, len);
780 printsub('>', temp+2, len - 2);
781 }
782 /*@*/ else printf("lm_will: not enough room in buffer\n");
783 }
784 break;
785 case TELOPT_LFLOW:
786 if (my_want_state_is_wont(TELOPT_LFLOW))
787 return;
788 if (SB_EOF())
789 return;
790 switch(SB_GET()) {
791 case LFLOW_RESTART_ANY:
792 restartany = 1;
793 break;
794 case LFLOW_RESTART_XON:
795 restartany = 0;
796 break;
797 case LFLOW_ON:
798 localflow = 1;
799 break;
800 case LFLOW_OFF:
801 localflow = 0;
802 break;
803 default:
804 return;
805 }
806 setcommandmode();
807 setconnmode(0);
808 break;
809
810 case TELOPT_LINEMODE:
811 if (my_want_state_is_wont(TELOPT_LINEMODE))
812 return;
813 if (SB_EOF())
814 return;
815 switch (SB_GET()) {
816 case WILL:
817 lm_will(subpointer, SB_LEN());
818 break;
819 case WONT:
820 lm_wont(subpointer, SB_LEN());
821 break;
822 case DO:
823 lm_do(subpointer, SB_LEN());
824 break;
825 case DONT:
826 lm_dont(subpointer, SB_LEN());
827 break;
828 case LM_SLC:
829 slc(subpointer, SB_LEN());
830 break;
831 case LM_MODE:
832 lm_mode(subpointer, SB_LEN(), 0);
833 break;
834 default:
835 break;
836 }
837 break;
838
839 #ifdef OLD_ENVIRON
840 case TELOPT_OLD_ENVIRON:
841 #endif
842 case TELOPT_NEW_ENVIRON:
843 if (SB_EOF())
844 return;
845 switch(SB_PEEK()) {
846 case TELQUAL_IS:
847 case TELQUAL_INFO:
848 if (my_want_state_is_dont(subchar))
849 return;
850 break;
851 case TELQUAL_SEND:
852 if (my_want_state_is_wont(subchar)) {
853 return;
854 }
855 break;
856 default:
857 return;
858 }
859 env_opt(subpointer, SB_LEN());
860 break;
861
862 case TELOPT_XDISPLOC:
863 if (my_want_state_is_wont(TELOPT_XDISPLOC))
864 return;
865 if (SB_EOF())
866 return;
867 if (SB_GET() == TELQUAL_SEND) {
868 unsigned char temp[50], *dp;
869 int len;
870
871 if ((dp = env_getvalue("DISPLAY")) == NULL ||
872 strlen(dp) > sizeof(temp) - 7) {
873 /*
874 * Something happened, we no longer have a DISPLAY
875 * variable. Or it is too long. So, turn off the option.
876 */
877 send_wont(TELOPT_XDISPLOC, 1);
878 break;
879 }
880 snprintf(temp, sizeof(temp), "%c%c%c%c%s%c%c", IAC, SB,
881 TELOPT_XDISPLOC, TELQUAL_IS, dp, IAC, SE);
882 len = strlen((char *)temp+4) + 4; /* temp[3] is 0 ... */
883
884 if (len < NETROOM()) {
885 ring_supply_data(&netoring, temp, len);
886 printsub('>', temp+2, len - 2);
887 }
888 /*@*/ else printf("lm_will: not enough room in buffer\n");
889 }
890 break;
891
892 #ifdef AUTHENTICATION
893 case TELOPT_AUTHENTICATION: {
894 if (!autologin)
895 break;
896 if (SB_EOF())
897 return;
898 switch(SB_GET()) {
899 case TELQUAL_IS:
900 if (my_want_state_is_dont(TELOPT_AUTHENTICATION))
901 return;
902 auth_is(subpointer, SB_LEN());
903 break;
904 case TELQUAL_SEND:
905 if (my_want_state_is_wont(TELOPT_AUTHENTICATION))
906 return;
907 auth_send(subpointer, SB_LEN());
908 break;
909 case TELQUAL_REPLY:
910 if (my_want_state_is_wont(TELOPT_AUTHENTICATION))
911 return;
912 auth_reply(subpointer, SB_LEN());
913 break;
914 case TELQUAL_NAME:
915 if (my_want_state_is_dont(TELOPT_AUTHENTICATION))
916 return;
917 auth_name(subpointer, SB_LEN());
918 break;
919 }
920 }
921 break;
922 #endif
923 #ifdef ENCRYPTION
924 case TELOPT_ENCRYPT:
925 if (SB_EOF())
926 return;
927 switch(SB_GET()) {
928 case ENCRYPT_START:
929 if (my_want_state_is_dont(TELOPT_ENCRYPT))
930 return;
931 encrypt_start(subpointer, SB_LEN());
932 break;
933 case ENCRYPT_END:
934 if (my_want_state_is_dont(TELOPT_ENCRYPT))
935 return;
936 encrypt_end();
937 break;
938 case ENCRYPT_SUPPORT:
939 if (my_want_state_is_wont(TELOPT_ENCRYPT))
940 return;
941 encrypt_support(subpointer, SB_LEN());
942 break;
943 case ENCRYPT_REQSTART:
944 if (my_want_state_is_wont(TELOPT_ENCRYPT))
945 return;
946 encrypt_request_start(subpointer, SB_LEN());
947 break;
948 case ENCRYPT_REQEND:
949 if (my_want_state_is_wont(TELOPT_ENCRYPT))
950 return;
951 /*
952 * We can always send an REQEND so that we cannot
953 * get stuck encrypting. We should only get this
954 * if we have been able to get in the correct mode
955 * anyhow.
956 */
957 encrypt_request_end();
958 break;
959 case ENCRYPT_IS:
960 if (my_want_state_is_dont(TELOPT_ENCRYPT))
961 return;
962 encrypt_is(subpointer, SB_LEN());
963 break;
964 case ENCRYPT_REPLY:
965 if (my_want_state_is_wont(TELOPT_ENCRYPT))
966 return;
967 encrypt_reply(subpointer, SB_LEN());
968 break;
969 case ENCRYPT_ENC_KEYID:
970 if (my_want_state_is_dont(TELOPT_ENCRYPT))
971 return;
972 encrypt_enc_keyid(subpointer, SB_LEN());
973 break;
974 case ENCRYPT_DEC_KEYID:
975 if (my_want_state_is_wont(TELOPT_ENCRYPT))
976 return;
977 encrypt_dec_keyid(subpointer, SB_LEN());
978 break;
979 default:
980 break;
981 }
982 break;
983 #endif /* ENCRYPTION */
984 default:
985 break;
986 }
987 }
988
989 static unsigned char str_lm[] = { IAC, SB, TELOPT_LINEMODE, 0, 0, IAC, SE };
990
991 void
992 lm_will(unsigned char *cmd, int len)
993 {
994 if (len < 1) {
995 /*@*/ printf("lm_will: no command!!!\n"); /* Should not happen... */
996 return;
997 }
998 switch(cmd[0]) {
999 case LM_FORWARDMASK: /* We shouldn't ever get this... */
1000 default:
1001 str_lm[3] = DONT;
1002 str_lm[4] = cmd[0];
1003 if (NETROOM() > (int)sizeof(str_lm)) {
1004 ring_supply_data(&netoring, str_lm, sizeof(str_lm));
1005 printsub('>', &str_lm[2], sizeof(str_lm)-2);
1006 }
1007 /*@*/ else printf("lm_will: not enough room in buffer\n");
1008 break;
1009 }
1010 }
1011
1012 void
1013 lm_wont(unsigned char *cmd, int len)
1014 {
1015 if (len < 1) {
1016 /*@*/ printf("lm_wont: no command!!!\n"); /* Should not happen... */
1017 return;
1018 }
1019 switch(cmd[0]) {
1020 case LM_FORWARDMASK: /* We shouldn't ever get this... */
1021 default:
1022 /* We are always DONT, so don't respond */
1023 return;
1024 }
1025 }
1026
1027 void
1028 lm_do(unsigned char *cmd, int len)
1029 {
1030 if (len < 1) {
1031 /*@*/ printf("lm_do: no command!!!\n"); /* Should not happen... */
1032 return;
1033 }
1034 switch(cmd[0]) {
1035 case LM_FORWARDMASK:
1036 default:
1037 str_lm[3] = WONT;
1038 str_lm[4] = cmd[0];
1039 if (NETROOM() > (int)sizeof(str_lm)) {
1040 ring_supply_data(&netoring, str_lm, sizeof(str_lm));
1041 printsub('>', &str_lm[2], sizeof(str_lm)-2);
1042 }
1043 /*@*/ else printf("lm_do: not enough room in buffer\n");
1044 break;
1045 }
1046 }
1047
1048 void
1049 lm_dont(unsigned char *cmd, int len)
1050 {
1051 if (len < 1) {
1052 /*@*/ printf("lm_dont: no command!!!\n"); /* Should not happen... */
1053 return;
1054 }
1055 switch(cmd[0]) {
1056 case LM_FORWARDMASK:
1057 default:
1058 /* we are always WONT, so don't respond */
1059 break;
1060 }
1061 }
1062
1063 static unsigned char str_lm_mode[] = {
1064 IAC, SB, TELOPT_LINEMODE, LM_MODE, 0, IAC, SE
1065 };
1066
1067 void
1068 lm_mode(unsigned char *cmd, int len, int init)
1069 {
1070 if (len != 1)
1071 return;
1072 if ((linemode&MODE_MASK&~MODE_ACK) == *cmd)
1073 return;
1074 if (*cmd&MODE_ACK)
1075 return;
1076 linemode = *cmd&(MODE_MASK&~MODE_ACK);
1077 str_lm_mode[4] = linemode;
1078 if (!init)
1079 str_lm_mode[4] |= MODE_ACK;
1080 if (NETROOM() > (int)sizeof(str_lm_mode)) {
1081 ring_supply_data(&netoring, str_lm_mode, sizeof(str_lm_mode));
1082 printsub('>', &str_lm_mode[2], sizeof(str_lm_mode)-2);
1083 }
1084 /*@*/ else printf("lm_mode: not enough room in buffer\n");
1085 setconnmode(0); /* set changed mode */
1086 }
1087
1088 \f
1089
1090 /*
1091 * slc()
1092 * Handle special character suboption of LINEMODE.
1093 */
1094
1095 struct spc {
1096 cc_t val;
1097 cc_t *valp;
1098 char flags; /* Current flags & level */
1099 char mylevel; /* Maximum level & flags */
1100 } spc_data[NSLC+1];
1101
1102 #define SLC_IMPORT 0
1103 #define SLC_EXPORT 1
1104 #define SLC_RVALUE 2
1105 static int slc_mode = SLC_EXPORT;
1106
1107 void
1108 slc_init(void)
1109 {
1110 struct spc *spcp;
1111
1112 localchars = 1;
1113 for (spcp = spc_data; spcp < &spc_data[NSLC+1]; spcp++) {
1114 spcp->val = 0;
1115 spcp->valp = 0;
1116 spcp->flags = spcp->mylevel = SLC_NOSUPPORT;
1117 }
1118
1119 #define initfunc(func, flags) { \
1120 spcp = &spc_data[func]; \
1121 if ((spcp->valp = tcval(func))) { \
1122 spcp->val = *spcp->valp; \
1123 spcp->mylevel = SLC_VARIABLE|flags; \
1124 } else { \
1125 spcp->val = 0; \
1126 spcp->mylevel = SLC_DEFAULT; \
1127 } \
1128 }
1129
1130 initfunc(SLC_SYNCH, 0);
1131 /* No BRK */
1132 initfunc(SLC_AO, 0);
1133 initfunc(SLC_AYT, 0);
1134 /* No EOR */
1135 initfunc(SLC_ABORT, SLC_FLUSHIN|SLC_FLUSHOUT);
1136 initfunc(SLC_EOF, 0);
1137 #ifndef SYSV_TERMIO
1138 initfunc(SLC_SUSP, SLC_FLUSHIN);
1139 #endif
1140 initfunc(SLC_EC, 0);
1141 initfunc(SLC_EL, 0);
1142 #ifndef SYSV_TERMIO
1143 initfunc(SLC_EW, 0);
1144 initfunc(SLC_RP, 0);
1145 initfunc(SLC_LNEXT, 0);
1146 #endif
1147 initfunc(SLC_XON, 0);
1148 initfunc(SLC_XOFF, 0);
1149 #ifdef SYSV_TERMIO
1150 spc_data[SLC_XON].mylevel = SLC_CANTCHANGE;
1151 spc_data[SLC_XOFF].mylevel = SLC_CANTCHANGE;
1152 #endif
1153 initfunc(SLC_FORW1, 0);
1154 #ifdef USE_TERMIO
1155 initfunc(SLC_FORW2, 0);
1156 /* No FORW2 */
1157 #endif
1158
1159 initfunc(SLC_IP, SLC_FLUSHIN|SLC_FLUSHOUT);
1160 #undef initfunc
1161
1162 if (slc_mode == SLC_EXPORT)
1163 slc_export();
1164 else
1165 slc_import(1);
1166
1167 }
1168
1169 void
1170 slcstate(void)
1171 {
1172 printf("Special characters are %s values\n",
1173 slc_mode == SLC_IMPORT ? "remote default" :
1174 slc_mode == SLC_EXPORT ? "local" :
1175 "remote");
1176 }
1177
1178 void
1179 slc_mode_export(void)
1180 {
1181 slc_mode = SLC_EXPORT;
1182 if (my_state_is_will(TELOPT_LINEMODE))
1183 slc_export();
1184 }
1185
1186 void
1187 slc_mode_import(int def)
1188 {
1189 slc_mode = def ? SLC_IMPORT : SLC_RVALUE;
1190 if (my_state_is_will(TELOPT_LINEMODE))
1191 slc_import(def);
1192 }
1193
1194 unsigned char slc_import_val[] = {
1195 IAC, SB, TELOPT_LINEMODE, LM_SLC, 0, SLC_VARIABLE, 0, IAC, SE
1196 };
1197 unsigned char slc_import_def[] = {
1198 IAC, SB, TELOPT_LINEMODE, LM_SLC, 0, SLC_DEFAULT, 0, IAC, SE
1199 };
1200
1201 void
1202 slc_import(int def)
1203 {
1204 if (NETROOM() > (int)sizeof(slc_import_val)) {
1205 if (def) {
1206 ring_supply_data(&netoring, slc_import_def, sizeof(slc_import_def));
1207 printsub('>', &slc_import_def[2], sizeof(slc_import_def)-2);
1208 } else {
1209 ring_supply_data(&netoring, slc_import_val, sizeof(slc_import_val));
1210 printsub('>', &slc_import_val[2], sizeof(slc_import_val)-2);
1211 }
1212 }
1213 /*@*/ else printf("slc_import: not enough room\n");
1214 }
1215
1216 void
1217 slc_export(void)
1218 {
1219 struct spc *spcp;
1220
1221 TerminalDefaultChars();
1222
1223 slc_start_reply();
1224 for (spcp = &spc_data[1]; spcp < &spc_data[NSLC+1]; spcp++) {
1225 if (spcp->mylevel != SLC_NOSUPPORT) {
1226 if (spcp->val == (cc_t)(_POSIX_VDISABLE))
1227 spcp->flags = SLC_NOSUPPORT;
1228 else
1229 spcp->flags = spcp->mylevel;
1230 if (spcp->valp)
1231 spcp->val = *spcp->valp;
1232 slc_add_reply(spcp - spc_data, spcp->flags, spcp->val);
1233 }
1234 }
1235 slc_end_reply();
1236 (void)slc_update();
1237 setconnmode(1); /* Make sure the character values are set */
1238 }
1239
1240 void
1241 slc(unsigned char *cp, int len)
1242 {
1243 struct spc *spcp;
1244 int func,level;
1245
1246 slc_start_reply();
1247
1248 for (; len >= 3; len -=3, cp +=3) {
1249
1250 func = cp[SLC_FUNC];
1251
1252 if (func == 0) {
1253 /*
1254 * Client side: always ignore 0 function.
1255 */
1256 continue;
1257 }
1258 if (func > NSLC) {
1259 if ((cp[SLC_FLAGS] & SLC_LEVELBITS) != SLC_NOSUPPORT)
1260 slc_add_reply(func, SLC_NOSUPPORT, 0);
1261 continue;
1262 }
1263
1264 spcp = &spc_data[func];
1265
1266 level = cp[SLC_FLAGS]&(SLC_LEVELBITS|SLC_ACK);
1267
1268 if ((cp[SLC_VALUE] == (unsigned char)spcp->val) &&
1269 ((level&SLC_LEVELBITS) == (spcp->flags&SLC_LEVELBITS))) {
1270 continue;
1271 }
1272
1273 if (level == (SLC_DEFAULT|SLC_ACK)) {
1274 /*
1275 * This is an error condition, the SLC_ACK
1276 * bit should never be set for the SLC_DEFAULT
1277 * level. Our best guess to recover is to
1278 * ignore the SLC_ACK bit.
1279 */
1280 cp[SLC_FLAGS] &= ~SLC_ACK;
1281 }
1282
1283 if (level == ((spcp->flags&SLC_LEVELBITS)|SLC_ACK)) {
1284 spcp->val = (cc_t)cp[SLC_VALUE];
1285 spcp->flags = cp[SLC_FLAGS]; /* include SLC_ACK */
1286 continue;
1287 }
1288
1289 level &= ~SLC_ACK;
1290
1291 if (level <= (spcp->mylevel&SLC_LEVELBITS)) {
1292 spcp->flags = cp[SLC_FLAGS]|SLC_ACK;
1293 spcp->val = (cc_t)cp[SLC_VALUE];
1294 }
1295 if (level == SLC_DEFAULT) {
1296 if ((spcp->mylevel&SLC_LEVELBITS) != SLC_DEFAULT)
1297 spcp->flags = spcp->mylevel;
1298 else
1299 spcp->flags = SLC_NOSUPPORT;
1300 }
1301 slc_add_reply(func, spcp->flags, spcp->val);
1302 }
1303 slc_end_reply();
1304 if (slc_update())
1305 setconnmode(1); /* set the new character values */
1306 }
1307
1308 void
1309 slc_check(void)
1310 {
1311 struct spc *spcp;
1312
1313 slc_start_reply();
1314 for (spcp = &spc_data[1]; spcp < &spc_data[NSLC+1]; spcp++) {
1315 if (spcp->valp && spcp->val != *spcp->valp) {
1316 spcp->val = *spcp->valp;
1317 if (spcp->val == (cc_t)(_POSIX_VDISABLE))
1318 spcp->flags = SLC_NOSUPPORT;
1319 else
1320 spcp->flags = spcp->mylevel;
1321 slc_add_reply(spcp - spc_data, spcp->flags, spcp->val);
1322 }
1323 }
1324 slc_end_reply();
1325 setconnmode(1);
1326 }
1327
1328 unsigned char slc_reply[128];
1329 unsigned char const * const slc_reply_eom = &slc_reply[sizeof(slc_reply)];
1330 unsigned char *slc_replyp;
1331
1332 void
1333 slc_start_reply(void)
1334 {
1335 slc_replyp = slc_reply;
1336 *slc_replyp++ = IAC;
1337 *slc_replyp++ = SB;
1338 *slc_replyp++ = TELOPT_LINEMODE;
1339 *slc_replyp++ = LM_SLC;
1340 }
1341
1342 void
1343 slc_add_reply(unsigned char func, unsigned char flags, cc_t value)
1344 {
1345 /* A sequence of up to 6 bytes my be written for this member of the SLC
1346 * suboption list by this function. The end of negotiation command,
1347 * which is written by slc_end_reply(), will require 2 additional
1348 * bytes. Do not proceed unless there is sufficient space for these
1349 * items.
1350 */
1351 if (&slc_replyp[6+2] > slc_reply_eom)
1352 return;
1353 if ((*slc_replyp++ = func) == IAC)
1354 *slc_replyp++ = IAC;
1355 if ((*slc_replyp++ = flags) == IAC)
1356 *slc_replyp++ = IAC;
1357 if ((*slc_replyp++ = (unsigned char)value) == IAC)
1358 *slc_replyp++ = IAC;
1359 }
1360
1361 void
1362 slc_end_reply(void)
1363 {
1364 int len;
1365
1366 /* The end of negotiation command requires 2 bytes. */
1367 if (&slc_replyp[2] > slc_reply_eom)
1368 return;
1369 *slc_replyp++ = IAC;
1370 *slc_replyp++ = SE;
1371 len = slc_replyp - slc_reply;
1372 if (len <= 6)
1373 return;
1374 if (NETROOM() > len) {
1375 ring_supply_data(&netoring, slc_reply, slc_replyp - slc_reply);
1376 printsub('>', &slc_reply[2], slc_replyp - slc_reply - 2);
1377 }
1378 /*@*/else printf("slc_end_reply: not enough room\n");
1379 }
1380
1381 int
1382 slc_update(void)
1383 {
1384 struct spc *spcp;
1385 int need_update = 0;
1386
1387 for (spcp = &spc_data[1]; spcp < &spc_data[NSLC+1]; spcp++) {
1388 if (!(spcp->flags&SLC_ACK))
1389 continue;
1390 spcp->flags &= ~SLC_ACK;
1391 if (spcp->valp && (*spcp->valp != spcp->val)) {
1392 *spcp->valp = spcp->val;
1393 need_update = 1;
1394 }
1395 }
1396 return(need_update);
1397 }
1398
1399 #ifdef OLD_ENVIRON
1400 # ifdef ENV_HACK
1401 /*
1402 * Earlier version of telnet/telnetd from the BSD code had
1403 * the definitions of VALUE and VAR reversed. To ensure
1404 * maximum interoperability, we assume that the server is
1405 * an older BSD server, until proven otherwise. The newer
1406 * BSD servers should be able to handle either definition,
1407 * so it is better to use the wrong values if we don't
1408 * know what type of server it is.
1409 */
1410 int env_auto = 1;
1411 int old_env_var = OLD_ENV_VAR;
1412 int old_env_value = OLD_ENV_VALUE;
1413 # else
1414 # define old_env_var OLD_ENV_VAR
1415 # define old_env_value OLD_ENV_VALUE
1416 # endif
1417 #endif
1418
1419 void
1420 env_opt(unsigned char *buf, int len)
1421 {
1422 unsigned char *ep = 0, *epc = 0;
1423 int i;
1424
1425 switch(buf[0]&0xff) {
1426 case TELQUAL_SEND:
1427 env_opt_start();
1428 if (len == 1) {
1429 env_opt_add(NULL);
1430 } else for (i = 1; i < len; i++) {
1431 switch (buf[i]&0xff) {
1432 #ifdef OLD_ENVIRON
1433 case OLD_ENV_VAR:
1434 # ifdef ENV_HACK
1435 if (telopt_environ == TELOPT_OLD_ENVIRON
1436 && env_auto) {
1437 /* Server has the same definitions */
1438 old_env_var = OLD_ENV_VAR;
1439 old_env_value = OLD_ENV_VALUE;
1440 }
1441 /* FALLTHROUGH */
1442 # endif
1443 case OLD_ENV_VALUE:
1444 /*
1445 * Although OLD_ENV_VALUE is not legal, we will
1446 * still recognize it, just in case it is an
1447 * old server that has VAR & VALUE mixed up...
1448 */
1449 /* FALLTHROUGH */
1450 #else
1451 case NEW_ENV_VAR:
1452 #endif
1453 case ENV_USERVAR:
1454 if (ep) {
1455 *epc = 0;
1456 env_opt_add(ep);
1457 }
1458 ep = epc = &buf[i+1];
1459 break;
1460 case ENV_ESC:
1461 i++;
1462 /*FALLTHROUGH*/
1463 default:
1464 if (epc)
1465 *epc++ = buf[i];
1466 break;
1467 }
1468 }
1469 if (ep) {
1470 *epc = 0;
1471 env_opt_add(ep);
1472 }
1473 env_opt_end(1);
1474 break;
1475
1476 case TELQUAL_IS:
1477 case TELQUAL_INFO:
1478 /* Ignore for now. We shouldn't get it anyway. */
1479 break;
1480
1481 default:
1482 break;
1483 }
1484 }
1485
1486 #define OPT_REPLY_SIZE (2 * SUBBUFSIZE)
1487 unsigned char *opt_reply = NULL;
1488 unsigned char *opt_replyp;
1489 unsigned char *opt_replyend;
1490
1491 void
1492 env_opt_start(void)
1493 {
1494 if (opt_reply)
1495 opt_reply = (unsigned char *)realloc(opt_reply, OPT_REPLY_SIZE);
1496 else
1497 opt_reply = (unsigned char *)malloc(OPT_REPLY_SIZE);
1498 if (opt_reply == NULL) {
1499 /*@*/ printf("env_opt_start: malloc()/realloc() failed!!!\n");
1500 opt_reply = opt_replyp = opt_replyend = NULL;
1501 return;
1502 }
1503 opt_replyp = opt_reply;
1504 opt_replyend = opt_reply + OPT_REPLY_SIZE;
1505 *opt_replyp++ = IAC;
1506 *opt_replyp++ = SB;
1507 *opt_replyp++ = telopt_environ;
1508 *opt_replyp++ = TELQUAL_IS;
1509 }
1510
1511 void
1512 env_opt_start_info(void)
1513 {
1514 env_opt_start();
1515 if (opt_replyp)
1516 opt_replyp[-1] = TELQUAL_INFO;
1517 }
1518
1519 void
1520 env_opt_add(unsigned char *ep)
1521 {
1522 unsigned char *vp, c;
1523
1524 if (opt_reply == NULL) /*XXX*/
1525 return; /*XXX*/
1526
1527 if (ep == NULL || *ep == '\0') {
1528 /* Send user defined variables first. */
1529 env_default(1, 0);
1530 while ((ep = env_default(0, 0)))
1531 env_opt_add(ep);
1532
1533 /* Now add the list of well know variables. */
1534 env_default(1, 1);
1535 while ((ep = env_default(0, 1)))
1536 env_opt_add(ep);
1537 return;
1538 }
1539 vp = env_getvalue(ep);
1540 if (opt_replyp + (vp ? 2 * strlen((char *)vp) : 0) +
1541 2 * strlen((char *)ep) + 6 > opt_replyend)
1542 {
1543 int len;
1544 opt_replyend += OPT_REPLY_SIZE;
1545 len = opt_replyend - opt_reply;
1546 opt_reply = (unsigned char *)realloc(opt_reply, len);
1547 if (opt_reply == NULL) {
1548 /*@*/ printf("env_opt_add: realloc() failed!!!\n");
1549 opt_reply = opt_replyp = opt_replyend = NULL;
1550 return;
1551 }
1552 opt_replyp = opt_reply + len - (opt_replyend - opt_replyp);
1553 opt_replyend = opt_reply + len;
1554 }
1555 if (opt_welldefined(ep))
1556 #ifdef OLD_ENVIRON
1557 if (telopt_environ == TELOPT_OLD_ENVIRON)
1558 *opt_replyp++ = old_env_var;
1559 else
1560 #endif
1561 *opt_replyp++ = NEW_ENV_VAR;
1562 else
1563 *opt_replyp++ = ENV_USERVAR;
1564 for (;;) {
1565 while ((c = *ep++)) {
1566 if (opt_replyp + (2 + 2) > opt_replyend)
1567 return;
1568 switch(c&0xff) {
1569 case IAC:
1570 *opt_replyp++ = IAC;
1571 break;
1572 case NEW_ENV_VAR:
1573 case NEW_ENV_VALUE:
1574 case ENV_ESC:
1575 case ENV_USERVAR:
1576 *opt_replyp++ = ENV_ESC;
1577 break;
1578 }
1579 *opt_replyp++ = c;
1580 }
1581 if ((ep = vp)) {
1582 if (opt_replyp + (1 + 2 + 2) > opt_replyend)
1583 return;
1584 #ifdef OLD_ENVIRON
1585 if (telopt_environ == TELOPT_OLD_ENVIRON)
1586 *opt_replyp++ = old_env_value;
1587 else
1588 #endif
1589 *opt_replyp++ = NEW_ENV_VALUE;
1590 vp = NULL;
1591 } else
1592 break;
1593 }
1594 }
1595
1596 int
1597 opt_welldefined(const char *ep)
1598 {
1599 if ((strcmp(ep, "USER") == 0) ||
1600 (strcmp(ep, "DISPLAY") == 0) ||
1601 (strcmp(ep, "PRINTER") == 0) ||
1602 (strcmp(ep, "SYSTEMTYPE") == 0) ||
1603 (strcmp(ep, "JOB") == 0) ||
1604 (strcmp(ep, "ACCT") == 0))
1605 return(1);
1606 return(0);
1607 }
1608
1609 void
1610 env_opt_end(int emptyok)
1611 {
1612 int len;
1613
1614 if (opt_replyp + 2 > opt_replyend)
1615 return;
1616 len = opt_replyp + 2 - opt_reply;
1617 if (emptyok || len > 6) {
1618 *opt_replyp++ = IAC;
1619 *opt_replyp++ = SE;
1620 if (NETROOM() > len) {
1621 ring_supply_data(&netoring, opt_reply, len);
1622 printsub('>', &opt_reply[2], len - 2);
1623 }
1624 /*@*/ else printf("slc_end_reply: not enough room\n");
1625 }
1626 if (opt_reply) {
1627 free(opt_reply);
1628 opt_reply = opt_replyp = opt_replyend = NULL;
1629 }
1630 }
1631
1632 \f
1633
1634 int
1635 telrcv(void)
1636 {
1637 int c;
1638 int scc;
1639 unsigned char *sbp;
1640 int count;
1641 int returnValue = 0;
1642
1643 scc = 0;
1644 count = 0;
1645 while (TTYROOM() > 2) {
1646 if (scc == 0) {
1647 if (count) {
1648 ring_consumed(&netiring, count);
1649 returnValue = 1;
1650 count = 0;
1651 }
1652 sbp = netiring.consume;
1653 scc = ring_full_consecutive(&netiring);
1654 if (scc == 0) {
1655 /* No more data coming in */
1656 break;
1657 }
1658 }
1659
1660 c = *sbp++ & 0xff, scc--; count++;
1661 #ifdef ENCRYPTION
1662 if (decrypt_input)
1663 c = (*decrypt_input)(c);
1664 #endif /* ENCRYPTION */
1665
1666 switch (telrcv_state) {
1667
1668 case TS_CR:
1669 telrcv_state = TS_DATA;
1670 if (c == '\0') {
1671 break; /* Ignore \0 after CR */
1672 }
1673 else if ((c == '\n') && my_want_state_is_dont(TELOPT_ECHO) && !crmod) {
1674 TTYADD(c);
1675 break;
1676 }
1677 /* FALLTHROUGH */
1678
1679 case TS_DATA:
1680 if (c == IAC && telnetport >= 0) {
1681 telrcv_state = TS_IAC;
1682 break;
1683 }
1684 /*
1685 * The 'crmod' hack (see following) is needed
1686 * since we can't * set CRMOD on output only.
1687 * Machines like MULTICS like to send \r without
1688 * \n; since we must turn off CRMOD to get proper
1689 * input, the mapping is done here (sigh).
1690 */
1691 if ((c == '\r') && my_want_state_is_dont(TELOPT_BINARY)) {
1692 if (scc > 0) {
1693 c = *sbp&0xff;
1694 #ifdef ENCRYPTION
1695 if (decrypt_input)
1696 c = (*decrypt_input)(c);
1697 #endif /* ENCRYPTION */
1698 if (c == 0) {
1699 sbp++, scc--; count++;
1700 /* a "true" CR */
1701 TTYADD('\r');
1702 } else if (my_want_state_is_dont(TELOPT_ECHO) &&
1703 (c == '\n')) {
1704 sbp++, scc--; count++;
1705 TTYADD('\n');
1706 } else {
1707 #ifdef ENCRYPTION
1708 if (decrypt_input)
1709 (*decrypt_input)(-1);
1710 #endif /* ENCRYPTION */
1711
1712 TTYADD('\r');
1713 if (crmod) {
1714 TTYADD('\n');
1715 }
1716 }
1717 } else {
1718 telrcv_state = TS_CR;
1719 TTYADD('\r');
1720 if (crmod) {
1721 TTYADD('\n');
1722 }
1723 }
1724 } else {
1725 TTYADD(c);
1726 }
1727 continue;
1728
1729 case TS_IAC:
1730 process_iac:
1731 switch (c) {
1732
1733 case WILL:
1734 telrcv_state = TS_WILL;
1735 continue;
1736
1737 case WONT:
1738 telrcv_state = TS_WONT;
1739 continue;
1740
1741 case DO:
1742 telrcv_state = TS_DO;
1743 continue;
1744
1745 case DONT:
1746 telrcv_state = TS_DONT;
1747 continue;
1748
1749 case DM:
1750 /*
1751 * We may have missed an urgent notification,
1752 * so make sure we flush whatever is in the
1753 * buffer currently.
1754 */
1755 printoption("RCVD", IAC, DM);
1756 SYNCHing = 1;
1757 (void) ttyflush(1);
1758 SYNCHing = stilloob();
1759 settimer(gotDM);
1760 break;
1761
1762 case SB:
1763 SB_CLEAR();
1764 telrcv_state = TS_SB;
1765 continue;
1766
1767 case IAC:
1768 TTYADD(IAC);
1769 break;
1770
1771 case NOP:
1772 case GA:
1773 default:
1774 printoption("RCVD", IAC, c);
1775 break;
1776 }
1777 telrcv_state = TS_DATA;
1778 continue;
1779
1780 case TS_WILL:
1781 printoption("RCVD", WILL, c);
1782 willoption(c);
1783 telrcv_state = TS_DATA;
1784 continue;
1785
1786 case TS_WONT:
1787 printoption("RCVD", WONT, c);
1788 wontoption(c);
1789 telrcv_state = TS_DATA;
1790 continue;
1791
1792 case TS_DO:
1793 printoption("RCVD", DO, c);
1794 dooption(c);
1795 if (c == TELOPT_NAWS) {
1796 sendnaws();
1797 } else if (c == TELOPT_LFLOW) {
1798 localflow = 1;
1799 setcommandmode();
1800 setconnmode(0);
1801 }
1802 telrcv_state = TS_DATA;
1803 continue;
1804
1805 case TS_DONT:
1806 printoption("RCVD", DONT, c);
1807 dontoption(c);
1808 flushline = 1;
1809 setconnmode(0); /* set new tty mode (maybe) */
1810 telrcv_state = TS_DATA;
1811 continue;
1812
1813 case TS_SB:
1814 if (c == IAC) {
1815 telrcv_state = TS_SE;
1816 } else {
1817 SB_ACCUM(c);
1818 }
1819 continue;
1820
1821 case TS_SE:
1822 if (c != SE) {
1823 if (c != IAC) {
1824 /*
1825 * This is an error. We only expect to get
1826 * "IAC IAC" or "IAC SE". Several things may
1827 * have happend. An IAC was not doubled, the
1828 * IAC SE was left off, or another option got
1829 * inserted into the suboption are all possibilities.
1830 * If we assume that the IAC was not doubled,
1831 * and really the IAC SE was left off, we could
1832 * get into an infinate loop here. So, instead,
1833 * we terminate the suboption, and process the
1834 * partial suboption if we can.
1835 */
1836 SB_ACCUM(IAC);
1837 SB_ACCUM(c);
1838 subpointer -= 2;
1839 SB_TERM();
1840
1841 printoption("In SUBOPTION processing, RCVD", IAC, c);
1842 suboption(); /* handle sub-option */
1843 telrcv_state = TS_IAC;
1844 goto process_iac;
1845 }
1846 SB_ACCUM(c);
1847 telrcv_state = TS_SB;
1848 } else {
1849 SB_ACCUM(IAC);
1850 SB_ACCUM(SE);
1851 subpointer -= 2;
1852 SB_TERM();
1853 suboption(); /* handle sub-option */
1854 telrcv_state = TS_DATA;
1855 }
1856 }
1857 }
1858 if (count)
1859 ring_consumed(&netiring, count);
1860 return returnValue||count;
1861 }
1862
1863 static int bol = 1, local = 0;
1864
1865 int
1866 rlogin_susp(void)
1867 {
1868 if (local) {
1869 local = 0;
1870 bol = 1;
1871 command(0, "z\n", 2);
1872 return(1);
1873 }
1874 return(0);
1875 }
1876
1877 static int
1878 telsnd(void)
1879 {
1880 int tcc;
1881 int count;
1882 int returnValue = 0;
1883 unsigned char *tbp;
1884
1885 tcc = 0;
1886 count = 0;
1887 while (NETROOM() > 2) {
1888 int sc;
1889 int c;
1890
1891 if (tcc == 0) {
1892 if (count) {
1893 ring_consumed(&ttyiring, count);
1894 returnValue = 1;
1895 count = 0;
1896 }
1897 tbp = ttyiring.consume;
1898 tcc = ring_full_consecutive(&ttyiring);
1899 if (tcc == 0) {
1900 break;
1901 }
1902 }
1903 c = *tbp++ & 0xff, sc = strip(c), tcc--; count++;
1904 if (rlogin != _POSIX_VDISABLE) {
1905 if (bol) {
1906 bol = 0;
1907 if (sc == rlogin) {
1908 local = 1;
1909 continue;
1910 }
1911 } else if (local) {
1912 local = 0;
1913 if (sc == '.' || c == termEofChar) {
1914 bol = 1;
1915 command(0, "close\n", 6);
1916 continue;
1917 }
1918 if (sc == termSuspChar) {
1919 bol = 1;
1920 command(0, "z\n", 2);
1921 continue;
1922 }
1923 if (sc == escape) {
1924 command(0, tbp, tcc);
1925 bol = 1;
1926 count += tcc;
1927 tcc = 0;
1928 flushline = 1;
1929 break;
1930 }
1931 if (sc != rlogin) {
1932 ++tcc;
1933 --tbp;
1934 --count;
1935 c = sc = rlogin;
1936 }
1937 }
1938 if ((sc == '\n') || (sc == '\r'))
1939 bol = 1;
1940 } else if (escape != _POSIX_VDISABLE && sc == escape) {
1941 /*
1942 * Double escape is a pass through of a single escape character.
1943 */
1944 if (tcc && strip(*tbp) == escape) {
1945 tbp++;
1946 tcc--;
1947 count++;
1948 bol = 0;
1949 } else {
1950 command(0, (char *)tbp, tcc);
1951 bol = 1;
1952 count += tcc;
1953 tcc = 0;
1954 flushline = 1;
1955 break;
1956 }
1957 } else
1958 bol = 0;
1959 #ifdef KLUDGELINEMODE
1960 if (kludgelinemode && (globalmode&MODE_EDIT) && (sc == echoc)) {
1961 if (tcc > 0 && strip(*tbp) == echoc) {
1962 tcc--; tbp++; count++;
1963 } else {
1964 dontlecho = !dontlecho;
1965 settimer(echotoggle);
1966 setconnmode(0);
1967 flushline = 1;
1968 break;
1969 }
1970 }
1971 #endif
1972 if (MODE_LOCAL_CHARS(globalmode)) {
1973 if (TerminalSpecialChars(sc) == 0) {
1974 bol = 1;
1975 break;
1976 }
1977 }
1978 if (my_want_state_is_wont(TELOPT_BINARY)) {
1979 switch (c) {
1980 case '\n':
1981 /*
1982 * If we are in CRMOD mode (\r ==> \n)
1983 * on our local machine, then probably
1984 * a newline (unix) is CRLF (TELNET).
1985 */
1986 if (MODE_LOCAL_CHARS(globalmode)) {
1987 NETADD('\r');
1988 }
1989 NETADD('\n');
1990 bol = flushline = 1;
1991 break;
1992 case '\r':
1993 if (!crlf) {
1994 NET2ADD('\r', '\0');
1995 } else {
1996 NET2ADD('\r', '\n');
1997 }
1998 bol = flushline = 1;
1999 break;
2000 case IAC:
2001 NET2ADD(IAC, IAC);
2002 break;
2003 default:
2004 NETADD(c);
2005 break;
2006 }
2007 } else if (c == IAC) {
2008 NET2ADD(IAC, IAC);
2009 } else {
2010 NETADD(c);
2011 }
2012 }
2013 if (count)
2014 ring_consumed(&ttyiring, count);
2015 return returnValue||count; /* Non-zero if we did anything */
2016 }
2017 \f
2018 /*
2019 * Scheduler()
2020 *
2021 * Try to do something.
2022 *
2023 * If we do something useful, return 1; else return 0.
2024 *
2025 */
2026
2027 static int
2028 Scheduler(int block)
2029 {
2030 /* One wants to be a bit careful about setting returnValue
2031 * to one, since a one implies we did some useful work,
2032 * and therefore probably won't be called to block next
2033 */
2034 int returnValue;
2035 int netin, netout, netex, ttyin, ttyout;
2036
2037 /* Decide which rings should be processed */
2038
2039 netout = ring_full_count(&netoring) &&
2040 (flushline ||
2041 (my_want_state_is_wont(TELOPT_LINEMODE)
2042 #ifdef KLUDGELINEMODE
2043 && (!kludgelinemode || my_want_state_is_do(TELOPT_SGA))
2044 #endif
2045 ) ||
2046 my_want_state_is_will(TELOPT_BINARY));
2047 ttyout = ring_full_count(&ttyoring);
2048
2049 ttyin = ring_empty_count(&ttyiring) && (clienteof == 0);
2050
2051 netin = !ISend && ring_empty_count(&netiring);
2052
2053 netex = !SYNCHing;
2054
2055 /* Call to system code to process rings */
2056
2057 returnValue = process_rings(netin, netout, netex, ttyin, ttyout, !block);
2058
2059 /* Now, look at the input rings, looking for work to do. */
2060
2061 if (ring_full_count(&ttyiring)) {
2062 returnValue |= telsnd();
2063 }
2064
2065 if (ring_full_count(&netiring)) {
2066 returnValue |= telrcv();
2067 }
2068 return returnValue;
2069 }
2070 \f
2071 #ifdef AUTHENTICATION
2072 #define __unusedhere
2073 #else
2074 #define __unusedhere __unused
2075 #endif
2076 /*
2077 * Select from tty and network...
2078 */
2079 void
2080 telnet(char *user __unusedhere)
2081 {
2082 sys_telnet_init();
2083
2084 #ifdef AUTHENTICATION
2085 #ifdef ENCRYPTION
2086 {
2087 static char local_host[256] = { 0 };
2088
2089 if (!local_host[0]) {
2090 gethostname(local_host, sizeof(local_host));
2091 local_host[sizeof(local_host)-1] = 0;
2092 }
2093 auth_encrypt_init(local_host, hostname, "TELNET", 0);
2094 auth_encrypt_user(user);
2095 }
2096 #endif
2097 #endif
2098 if (telnetport > 0) {
2099 #ifdef AUTHENTICATION
2100 if (autologin)
2101 send_will(TELOPT_AUTHENTICATION, 1);
2102 #endif
2103 #ifdef ENCRYPTION
2104 send_do(TELOPT_ENCRYPT, 1);
2105 send_will(TELOPT_ENCRYPT, 1);
2106 #endif /* ENCRYPTION */
2107 send_do(TELOPT_SGA, 1);
2108 send_will(TELOPT_TTYPE, 1);
2109 send_will(TELOPT_NAWS, 1);
2110 send_will(TELOPT_TSPEED, 1);
2111 send_will(TELOPT_LFLOW, 1);
2112 send_will(TELOPT_LINEMODE, 1);
2113 send_will(TELOPT_NEW_ENVIRON, 1);
2114 send_do(TELOPT_STATUS, 1);
2115 if (env_getvalue("DISPLAY"))
2116 send_will(TELOPT_XDISPLOC, 1);
2117 if (eight)
2118 tel_enter_binary(eight);
2119 }
2120
2121 for (;;) {
2122 int schedValue;
2123
2124 while ((schedValue = Scheduler(0)) != 0) {
2125 if (schedValue == -1) {
2126 setcommandmode();
2127 return;
2128 }
2129 }
2130
2131 if (Scheduler(1) == -1) {
2132 setcommandmode();
2133 return;
2134 }
2135 }
2136 }
2137 \f
2138 #if 0 /* XXX - this not being in is a bug */
2139 /*
2140 * nextitem()
2141 *
2142 * Return the address of the next "item" in the TELNET data
2143 * stream. This will be the address of the next character if
2144 * the current address is a user data character, or it will
2145 * be the address of the character following the TELNET command
2146 * if the current address is a TELNET IAC ("I Am a Command")
2147 * character.
2148 */
2149
2150 static char *
2151 nextitem(char *current)
2152 {
2153 if ((*current&0xff) != IAC) {
2154 return current+1;
2155 }
2156 switch (*(current+1)&0xff) {
2157 case DO:
2158 case DONT:
2159 case WILL:
2160 case WONT:
2161 return current+3;
2162 case SB: /* loop forever looking for the SE */
2163 {
2164 char *look = current+2;
2165
2166 for (;;) {
2167 if ((*look++&0xff) == IAC) {
2168 if ((*look++&0xff) == SE) {
2169 return look;
2170 }
2171 }
2172 }
2173 }
2174 default:
2175 return current+2;
2176 }
2177 }
2178 #endif /* 0 */
2179
2180 /*
2181 * netclear()
2182 *
2183 * We are about to do a TELNET SYNCH operation. Clear
2184 * the path to the network.
2185 *
2186 * Things are a bit tricky since we may have sent the first
2187 * byte or so of a previous TELNET command into the network.
2188 * So, we have to scan the network buffer from the beginning
2189 * until we are up to where we want to be.
2190 *
2191 * A side effect of what we do, just to keep things
2192 * simple, is to clear the urgent data pointer. The principal
2193 * caller should be setting the urgent data pointer AFTER calling
2194 * us in any case.
2195 */
2196
2197 static void
2198 netclear(void)
2199 {
2200 /* Deleted */
2201 }
2202 \f
2203 /*
2204 * These routines add various telnet commands to the data stream.
2205 */
2206
2207 static void
2208 doflush(void)
2209 {
2210 NET2ADD(IAC, DO);
2211 NETADD(TELOPT_TM);
2212 flushline = 1;
2213 flushout = 1;
2214 (void) ttyflush(1); /* Flush/drop output */
2215 /* do printoption AFTER flush, otherwise the output gets tossed... */
2216 printoption("SENT", DO, TELOPT_TM);
2217 }
2218
2219 void
2220 xmitAO(void)
2221 {
2222 NET2ADD(IAC, AO);
2223 printoption("SENT", IAC, AO);
2224 if (autoflush) {
2225 doflush();
2226 }
2227 }
2228
2229 void
2230 xmitEL(void)
2231 {
2232 NET2ADD(IAC, EL);
2233 printoption("SENT", IAC, EL);
2234 }
2235
2236 void
2237 xmitEC(void)
2238 {
2239 NET2ADD(IAC, EC);
2240 printoption("SENT", IAC, EC);
2241 }
2242
2243 int
2244 dosynch(char *ch __unused)
2245 {
2246 netclear(); /* clear the path to the network */
2247 NETADD(IAC);
2248 setneturg();
2249 NETADD(DM);
2250 printoption("SENT", IAC, DM);
2251 return 1;
2252 }
2253
2254 int want_status_response = 0;
2255
2256 int
2257 get_status(char *ch __unused)
2258 {
2259 unsigned char tmp[16];
2260 unsigned char *cp;
2261
2262 if (my_want_state_is_dont(TELOPT_STATUS)) {
2263 printf("Remote side does not support STATUS option\n");
2264 return 0;
2265 }
2266 cp = tmp;
2267
2268 *cp++ = IAC;
2269 *cp++ = SB;
2270 *cp++ = TELOPT_STATUS;
2271 *cp++ = TELQUAL_SEND;
2272 *cp++ = IAC;
2273 *cp++ = SE;
2274 if (NETROOM() >= cp - tmp) {
2275 ring_supply_data(&netoring, tmp, cp-tmp);
2276 printsub('>', tmp+2, cp - tmp - 2);
2277 }
2278 ++want_status_response;
2279 return 1;
2280 }
2281
2282 void
2283 intp(void)
2284 {
2285 NET2ADD(IAC, IP);
2286 printoption("SENT", IAC, IP);
2287 flushline = 1;
2288 if (autoflush) {
2289 doflush();
2290 }
2291 if (autosynch) {
2292 dosynch(NULL);
2293 }
2294 }
2295
2296 void
2297 sendbrk(void)
2298 {
2299 NET2ADD(IAC, BREAK);
2300 printoption("SENT", IAC, BREAK);
2301 flushline = 1;
2302 if (autoflush) {
2303 doflush();
2304 }
2305 if (autosynch) {
2306 dosynch(NULL);
2307 }
2308 }
2309
2310 void
2311 sendabort(void)
2312 {
2313 NET2ADD(IAC, ABORT);
2314 printoption("SENT", IAC, ABORT);
2315 flushline = 1;
2316 if (autoflush) {
2317 doflush();
2318 }
2319 if (autosynch) {
2320 dosynch(NULL);
2321 }
2322 }
2323
2324 void
2325 sendsusp(void)
2326 {
2327 NET2ADD(IAC, SUSP);
2328 printoption("SENT", IAC, SUSP);
2329 flushline = 1;
2330 if (autoflush) {
2331 doflush();
2332 }
2333 if (autosynch) {
2334 dosynch(NULL);
2335 }
2336 }
2337
2338 void
2339 sendeof(void)
2340 {
2341 NET2ADD(IAC, xEOF);
2342 printoption("SENT", IAC, xEOF);
2343 }
2344
2345 void
2346 sendayt(void)
2347 {
2348 NET2ADD(IAC, AYT);
2349 printoption("SENT", IAC, AYT);
2350 }
2351
2352 /*
2353 * Send a window size update to the remote system.
2354 */
2355
2356 void
2357 sendnaws(void)
2358 {
2359 long rows, cols;
2360 unsigned char tmp[16];
2361 unsigned char *cp;
2362
2363 if (my_state_is_wont(TELOPT_NAWS))
2364 return;
2365
2366 #define PUTSHORT(cp, x) { if ((*cp++ = ((x)>>8)&0xff) == IAC) *cp++ = IAC; \
2367 if ((*cp++ = ((x))&0xff) == IAC) *cp++ = IAC; }
2368
2369 if (TerminalWindowSize(&rows, &cols) == 0) { /* Failed */
2370 return;
2371 }
2372
2373 cp = tmp;
2374
2375 *cp++ = IAC;
2376 *cp++ = SB;
2377 *cp++ = TELOPT_NAWS;
2378 PUTSHORT(cp, cols);
2379 PUTSHORT(cp, rows);
2380 *cp++ = IAC;
2381 *cp++ = SE;
2382 if (NETROOM() >= cp - tmp) {
2383 ring_supply_data(&netoring, tmp, cp-tmp);
2384 printsub('>', tmp+2, cp - tmp - 2);
2385 }
2386 }
2387
2388 void
2389 tel_enter_binary(int rw)
2390 {
2391 if (rw&1)
2392 send_do(TELOPT_BINARY, 1);
2393 if (rw&2)
2394 send_will(TELOPT_BINARY, 1);
2395 }
2396
2397 void
2398 tel_leave_binary(int rw)
2399 {
2400 if (rw&1)
2401 send_dont(TELOPT_BINARY, 1);
2402 if (rw&2)
2403 send_wont(TELOPT_BINARY, 1);
2404 }
Clone of Haiku svn repository