telnetd(8): Rename fatal function.
[dragonfly.git] / libexec / telnetd / utility.c
CommitLineData
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1/*
2 * Copyright (c) 1989, 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.
dc71b7ab 13 * 3. Neither the name of the University nor the names of its contributors
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14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
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28 *
29 * @(#)utility.c 8.4 (Berkeley) 5/30/95
068e7061 30 * $FreeBSD: src/crypto/telnet/telnetd/utility.c,v 1.5.2.4 2002/04/13 10:59:09 markm Exp $
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31 */
32
99dc049a 33#if defined(__FreeBSD__) || defined(__DragonFly__)
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34#include <locale.h>
35#include <sys/utsname.h>
36#endif
37#include <string.h>
38#define PRINTOPTIONS
39#include "telnetd.h"
40
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41#ifdef AUTHENTICATION
42#include <libtelnet/auth.h>
43#endif
44#ifdef ENCRYPTION
45#include <libtelnet/encrypt.h>
46#endif
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47
48/*
49 * utility functions performing io related tasks
50 */
51
52/*
53 * ttloop
54 *
55 * A small subroutine to flush the network output buffer, get some data
56 * from the network, and pass it through the telnet state machine. We
57 * also flush the pty input buffer (by dropping its data) if it becomes
58 * too full.
59 */
60
89a89091
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61void
62ttloop(void)
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63{
64
65 DIAG(TD_REPORT, output_data("td: ttloop\r\n"));
66 if (nfrontp - nbackp > 0) {
67 netflush();
68 }
69 ncc = read(net, netibuf, sizeof netibuf);
70 if (ncc < 0) {
71 syslog(LOG_INFO, "ttloop: read: %m");
72 exit(1);
73 } else if (ncc == 0) {
74 syslog(LOG_INFO, "ttloop: peer died: %m");
75 exit(1);
76 }
77 DIAG(TD_REPORT, output_data("td: ttloop read %d chars\r\n", ncc));
78 netip = netibuf;
79 telrcv(); /* state machine */
80 if (ncc > 0) {
81 pfrontp = pbackp = ptyobuf;
82 telrcv();
83 }
84} /* end of ttloop */
85
86/*
87 * Check a descriptor to see if out of band data exists on it.
88 */
89int
90stilloob(int s)
91{
92 static struct timeval timeout = { 0, 0 };
93 fd_set excepts;
94 int value;
95
96 do {
97 FD_ZERO(&excepts);
98 FD_SET(s, &excepts);
99 memset((char *)&timeout, 0, sizeof timeout);
60233e58 100 value = select(s+1, NULL, NULL, &excepts, &timeout);
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101 } while ((value == -1) && (errno == EINTR));
102
103 if (value < 0) {
104 fatalperror(pty, "select");
105 }
106 if (FD_ISSET(s, &excepts)) {
107 return 1;
108 } else {
109 return 0;
110 }
111}
112
113void
114ptyflush(void)
115{
116 int n;
117
118 if ((n = pfrontp - pbackp) > 0) {
119 DIAG(TD_REPORT | TD_PTYDATA,
120 output_data("td: ptyflush %d chars\r\n", n));
121 DIAG(TD_PTYDATA, printdata("pd", pbackp, n));
122 n = write(pty, pbackp, n);
123 }
124 if (n < 0) {
125 if (errno == EWOULDBLOCK || errno == EINTR)
126 return;
127 cleanup(0);
128 }
129 pbackp += n;
130 if (pbackp == pfrontp)
131 pbackp = pfrontp = ptyobuf;
132}
133
134/*
135 * nextitem()
136 *
137 * Return the address of the next "item" in the TELNET data
138 * stream. This will be the address of the next character if
139 * the current address is a user data character, or it will
140 * be the address of the character following the TELNET command
141 * if the current address is a TELNET IAC ("I Am a Command")
142 * character.
143 */
144static char *
145nextitem(char *current)
146{
147 if ((*current&0xff) != IAC) {
148 return current+1;
149 }
150 switch (*(current+1)&0xff) {
151 case DO:
152 case DONT:
153 case WILL:
154 case WONT:
155 return current+3;
156 case SB: /* loop forever looking for the SE */
157 {
158 char *look = current+2;
159
160 for (;;) {
161 if ((*look++&0xff) == IAC) {
162 if ((*look++&0xff) == SE) {
163 return look;
164 }
165 }
166 }
167 }
168 default:
169 return current+2;
170 }
171} /* end of nextitem */
172
173/*
174 * netclear()
175 *
176 * We are about to do a TELNET SYNCH operation. Clear
177 * the path to the network.
178 *
179 * Things are a bit tricky since we may have sent the first
180 * byte or so of a previous TELNET command into the network.
181 * So, we have to scan the network buffer from the beginning
182 * until we are up to where we want to be.
183 *
184 * A side effect of what we do, just to keep things
185 * simple, is to clear the urgent data pointer. The principal
186 * caller should be setting the urgent data pointer AFTER calling
187 * us in any case.
188 */
189void
190netclear(void)
191{
192 char *thisitem, *next;
193 char *good;
194#define wewant(p) ((nfrontp > p) && ((*p&0xff) == IAC) && \
195 ((*(p+1)&0xff) != EC) && ((*(p+1)&0xff) != EL))
196
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197#ifdef ENCRYPTION
198 thisitem = nclearto > netobuf ? nclearto : netobuf;
199#else /* ENCRYPTION */
984263bc 200 thisitem = netobuf;
068e7061 201#endif /* ENCRYPTION */
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202
203 while ((next = nextitem(thisitem)) <= nbackp) {
204 thisitem = next;
205 }
206
207 /* Now, thisitem is first before/at boundary. */
208
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209#ifdef ENCRYPTION
210 good = nclearto > netobuf ? nclearto : netobuf;
211#else /* ENCRYPTION */
984263bc 212 good = netobuf; /* where the good bytes go */
068e7061 213#endif /* ENCRYPTION */
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214
215 while (nfrontp > thisitem) {
216 if (wewant(thisitem)) {
217 int length;
218
219 next = thisitem;
220 do {
221 next = nextitem(next);
222 } while (wewant(next) && (nfrontp > next));
223 length = next-thisitem;
224 memmove(good, thisitem, length);
225 good += length;
226 thisitem = next;
227 } else {
228 thisitem = nextitem(thisitem);
229 }
230 }
231
232 nbackp = netobuf;
233 nfrontp = good; /* next byte to be sent */
234 neturg = 0;
235} /* end of netclear */
236
237/*
238 * netflush
239 * Send as much data as possible to the network,
240 * handling requests for urgent data.
241 */
242void
243netflush(void)
244{
245 int n;
246 extern int not42;
247
248 while ((n = nfrontp - nbackp) > 0) {
249#if 0
250 /* XXX This causes output_data() to recurse and die */
251 DIAG(TD_REPORT, {
252 n += output_data("td: netflush %d chars\r\n", n);
253 });
254#endif
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255#ifdef ENCRYPTION
256 if (encrypt_output) {
257 char *s = nclearto ? nclearto : nbackp;
258 if (nfrontp - s > 0) {
259 (*encrypt_output)((unsigned char *)s, nfrontp-s);
260 nclearto = nfrontp;
261 }
262 }
263#endif /* ENCRYPTION */
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264 /*
265 * if no urgent data, or if the other side appears to be an
266 * old 4.2 client (and thus unable to survive TCP urgent data),
267 * write the entire buffer in non-OOB mode.
268 */
269 if ((neturg == 0) || (not42 == 0)) {
270 n = write(net, nbackp, n); /* normal write */
271 } else {
272 n = neturg - nbackp;
273 /*
274 * In 4.2 (and 4.3) systems, there is some question about
275 * what byte in a sendOOB operation is the "OOB" data.
276 * To make ourselves compatible, we only send ONE byte
277 * out of band, the one WE THINK should be OOB (though
278 * we really have more the TCP philosophy of urgent data
279 * rather than the Unix philosophy of OOB data).
280 */
281 if (n > 1) {
282 n = send(net, nbackp, n-1, 0); /* send URGENT all by itself */
283 } else {
284 n = send(net, nbackp, n, MSG_OOB); /* URGENT data */
285 }
286 }
287 if (n == -1) {
288 if (errno == EWOULDBLOCK || errno == EINTR)
289 continue;
290 cleanup(0);
291 /* NOTREACHED */
292 }
293 nbackp += n;
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294#ifdef ENCRYPTION
295 if (nbackp > nclearto)
296 nclearto = 0;
297#endif /* ENCRYPTION */
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298 if (nbackp >= neturg) {
299 neturg = 0;
300 }
301 if (nbackp == nfrontp) {
302 nbackp = nfrontp = netobuf;
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303#ifdef ENCRYPTION
304 nclearto = 0;
305#endif /* ENCRYPTION */
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306 }
307 }
308 return;
309} /* end of netflush */
310
311
312/*
313 * miscellaneous functions doing a variety of little jobs follow ...
314 */
315
316
317void
ccf9d6e5 318fatalmsg(int f, const char *msg)
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319{
320 char buf[BUFSIZ];
321
322 (void) snprintf(buf, sizeof(buf), "telnetd: %s.\r\n", msg);
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323#ifdef ENCRYPTION
324 if (encrypt_output) {
325 /*
326 * Better turn off encryption first....
327 * Hope it flushes...
328 */
329 encrypt_send_end();
330 netflush();
331 }
332#endif /* ENCRYPTION */
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333 (void) write(f, buf, (int)strlen(buf));
334 sleep(1); /*XXX*/
335 exit(1);
336}
337
338void
339fatalperror(int f, const char *msg)
340{
341 char buf[BUFSIZ];
342
343 (void) snprintf(buf, sizeof(buf), "%s: %s", msg, strerror(errno));
ccf9d6e5 344 fatalmsg(f, buf);
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345}
346
347char editedhost[32];
348
349void
350edithost(char *pat, char *host)
351{
352 char *res = editedhost;
353
354 if (!pat)
355 pat = strdup("");
356 while (*pat) {
357 switch (*pat) {
358
359 case '#':
360 if (*host)
361 host++;
362 break;
363
364 case '@':
365 if (*host)
366 *res++ = *host++;
367 break;
368
369 default:
370 *res++ = *pat;
371 break;
372 }
373 if (res == &editedhost[sizeof editedhost - 1]) {
374 *res = '\0';
375 return;
376 }
377 pat++;
378 }
379 if (*host)
380 (void) strncpy(res, host,
381 sizeof editedhost - (res - editedhost) -1);
382 else
383 *res = '\0';
384 editedhost[sizeof editedhost - 1] = '\0';
385}
386
387static char *putlocation;
388
389static void
390putstr(const char *s)
391{
392
393 while (*s)
394 putchr(*s++);
395}
396
397void
398putchr(int cc)
399{
400 *putlocation++ = cc;
401}
402
99dc049a 403#if defined(__FreeBSD__) || defined(__DragonFly__)
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404static char fmtstr[] = { "%+" };
405#else
406static char fmtstr[] = { "%l:%M%P on %A, %d %B %Y" };
407#endif
408
409void
410putf(char *cp, char *where)
411{
412 char *slash;
413 time_t t;
414 char db[100];
99dc049a 415#if defined(__FreeBSD__) || defined(__DragonFly__)
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416 static struct utsname kerninfo;
417
418 if (!*kerninfo.sysname)
419 uname(&kerninfo);
420#endif
421
422 putlocation = where;
423
424 while (*cp) {
425 if (*cp =='\n') {
426 putstr("\r\n");
427 cp++;
428 continue;
429 } else if (*cp != '%') {
430 putchr(*cp++);
431 continue;
432 }
433 switch (*++cp) {
434
435 case 't':
436#ifdef STREAMSPTY
437 /* names are like /dev/pts/2 -- we want pts/2 */
438 slash = strchr(line+1, '/');
439#else
440 slash = strrchr(line, '/');
441#endif
068e7061 442 if (slash == (char *) 0)
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443 putstr(line);
444 else
445 putstr(&slash[1]);
446 break;
447
448 case 'h':
449 putstr(editedhost);
450 break;
451
452 case 'd':
99dc049a 453#if defined(__FreeBSD__) || defined(__DragonFly__)
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454 setlocale(LC_TIME, "");
455#endif
456 (void)time(&t);
457 (void)strftime(db, sizeof(db), fmtstr, localtime(&t));
458 putstr(db);
459 break;
460
99dc049a 461#if defined(__FreeBSD__) || defined(__DragonFly__)
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462 case 's':
463 putstr(kerninfo.sysname);
464 break;
465
466 case 'm':
467 putstr(kerninfo.machine);
468 break;
469
470 case 'r':
471 putstr(kerninfo.release);
472 break;
473
474 case 'v':
475 putstr(kerninfo.version);
476 break;
477#endif
478
479 case '%':
480 putchr('%');
481 break;
482 }
483 cp++;
484 }
485}
486
487#ifdef DIAGNOSTICS
488/*
489 * Print telnet options and commands in plain text, if possible.
490 */
491void
492printoption(const char *fmt, int option)
493{
494 if (TELOPT_OK(option))
495 output_data("%s %s\r\n", fmt, TELOPT(option));
496 else if (TELCMD_OK(option))
497 output_data("%s %s\r\n", fmt, TELCMD(option));
498 else
499 output_data("%s %d\r\n", fmt, option);
500 return;
501}
502
503void
504printsub(char direction, unsigned char *pointer, int length)
505{
506 int i = 0;
507
508 if (!(diagnostic & TD_OPTIONS))
509 return;
510
511 if (direction) {
512 output_data("td: %s suboption ",
513 direction == '<' ? "recv" : "send");
514 if (length >= 3) {
515 int j;
516
517 i = pointer[length-2];
518 j = pointer[length-1];
519
520 if (i != IAC || j != SE) {
521 output_data("(terminated by ");
522 if (TELOPT_OK(i))
523 output_data("%s ", TELOPT(i));
524 else if (TELCMD_OK(i))
525 output_data("%s ", TELCMD(i));
526 else
527 output_data("%d ", i);
528 if (TELOPT_OK(j))
529 output_data("%s", TELOPT(j));
530 else if (TELCMD_OK(j))
531 output_data("%s", TELCMD(j));
532 else
533 output_data("%d", j);
534 output_data(", not IAC SE!) ");
535 }
536 }
537 length -= 2;
538 }
539 if (length < 1) {
540 output_data("(Empty suboption??\?)");
541 return;
542 }
543 switch (pointer[0]) {
544 case TELOPT_TTYPE:
545 output_data("TERMINAL-TYPE ");
546 switch (pointer[1]) {
547 case TELQUAL_IS:
548 output_data("IS \"%.*s\"", length-2, (char *)pointer+2);
549 break;
550 case TELQUAL_SEND:
551 output_data("SEND");
552 break;
553 default:
554 output_data(
555 "- unknown qualifier %d (0x%x).",
556 pointer[1], pointer[1]);
557 }
558 break;
559 case TELOPT_TSPEED:
560 output_data("TERMINAL-SPEED");
561 if (length < 2) {
562 output_data(" (empty suboption??\?)");
563 break;
564 }
565 switch (pointer[1]) {
566 case TELQUAL_IS:
567 output_data(" IS %.*s", length-2, (char *)pointer+2);
568 break;
569 default:
570 if (pointer[1] == 1)
571 output_data(" SEND");
572 else
573 output_data(" %d (unknown)", pointer[1]);
574 for (i = 2; i < length; i++) {
575 output_data(" ?%d?", pointer[i]);
576 }
577 break;
578 }
579 break;
580
581 case TELOPT_LFLOW:
582 output_data("TOGGLE-FLOW-CONTROL");
583 if (length < 2) {
584 output_data(" (empty suboption??\?)");
585 break;
586 }
587 switch (pointer[1]) {
588 case LFLOW_OFF:
589 output_data(" OFF"); break;
590 case LFLOW_ON:
591 output_data(" ON"); break;
592 case LFLOW_RESTART_ANY:
593 output_data(" RESTART-ANY"); break;
594 case LFLOW_RESTART_XON:
595 output_data(" RESTART-XON"); break;
596 default:
597 output_data(" %d (unknown)", pointer[1]);
598 }
599 for (i = 2; i < length; i++) {
600 output_data(" ?%d?", pointer[i]);
601 }
602 break;
603
604 case TELOPT_NAWS:
605 output_data("NAWS");
606 if (length < 2) {
607 output_data(" (empty suboption??\?)");
608 break;
609 }
610 if (length == 2) {
611 output_data(" ?%d?", pointer[1]);
612 break;
613 }
614 output_data(" %d %d (%d)",
615 pointer[1], pointer[2],
616 (int)((((unsigned int)pointer[1])<<8)|((unsigned int)pointer[2])));
617 if (length == 4) {
618 output_data(" ?%d?", pointer[3]);
619 break;
620 }
621 output_data(" %d %d (%d)",
622 pointer[3], pointer[4],
623 (int)((((unsigned int)pointer[3])<<8)|((unsigned int)pointer[4])));
624 for (i = 5; i < length; i++) {
625 output_data(" ?%d?", pointer[i]);
626 }
627 break;
628
629 case TELOPT_LINEMODE:
630 output_data("LINEMODE ");
631 if (length < 2) {
632 output_data(" (empty suboption??\?)");
633 break;
634 }
635 switch (pointer[1]) {
636 case WILL:
637 output_data("WILL ");
638 goto common;
639 case WONT:
640 output_data("WONT ");
641 goto common;
642 case DO:
643 output_data("DO ");
644 goto common;
645 case DONT:
646 output_data("DONT ");
647 common:
648 if (length < 3) {
649 output_data("(no option??\?)");
650 break;
651 }
652 switch (pointer[2]) {
653 case LM_FORWARDMASK:
654 output_data("Forward Mask");
655 for (i = 3; i < length; i++) {
656 output_data(" %x", pointer[i]);
657 }
658 break;
659 default:
660 output_data("%d (unknown)", pointer[2]);
661 for (i = 3; i < length; i++) {
662 output_data(" %d", pointer[i]);
663 }
664 break;
665 }
666 break;
667
668 case LM_SLC:
669 output_data("SLC");
670 for (i = 2; i < length - 2; i += 3) {
671 if (SLC_NAME_OK(pointer[i+SLC_FUNC]))
672 output_data(" %s", SLC_NAME(pointer[i+SLC_FUNC]));
673 else
674 output_data(" %d", pointer[i+SLC_FUNC]);
675 switch (pointer[i+SLC_FLAGS]&SLC_LEVELBITS) {
676 case SLC_NOSUPPORT:
677 output_data(" NOSUPPORT"); break;
678 case SLC_CANTCHANGE:
679 output_data(" CANTCHANGE"); break;
680 case SLC_VARIABLE:
681 output_data(" VARIABLE"); break;
682 case SLC_DEFAULT:
683 output_data(" DEFAULT"); break;
684 }
685 output_data("%s%s%s",
686 pointer[i+SLC_FLAGS]&SLC_ACK ? "|ACK" : "",
687 pointer[i+SLC_FLAGS]&SLC_FLUSHIN ? "|FLUSHIN" : "",
688 pointer[i+SLC_FLAGS]&SLC_FLUSHOUT ? "|FLUSHOUT" : "");
689 if (pointer[i+SLC_FLAGS]& ~(SLC_ACK|SLC_FLUSHIN|
690 SLC_FLUSHOUT| SLC_LEVELBITS)) {
691 output_data("(0x%x)", pointer[i+SLC_FLAGS]);
692 }
693 output_data(" %d;", pointer[i+SLC_VALUE]);
694 if ((pointer[i+SLC_VALUE] == IAC) &&
695 (pointer[i+SLC_VALUE+1] == IAC))
696 i++;
697 }
698 for (; i < length; i++) {
699 output_data(" ?%d?", pointer[i]);
700 }
701 break;
702
703 case LM_MODE:
704 output_data("MODE ");
705 if (length < 3) {
706 output_data("(no mode??\?)");
707 break;
708 }
709 {
710 char tbuf[32];
711 sprintf(tbuf, "%s%s%s%s%s",
712 pointer[2]&MODE_EDIT ? "|EDIT" : "",
713 pointer[2]&MODE_TRAPSIG ? "|TRAPSIG" : "",
714 pointer[2]&MODE_SOFT_TAB ? "|SOFT_TAB" : "",
715 pointer[2]&MODE_LIT_ECHO ? "|LIT_ECHO" : "",
716 pointer[2]&MODE_ACK ? "|ACK" : "");
717 output_data("%s", tbuf[1] ? &tbuf[1] : "0");
718 }
719 if (pointer[2]&~(MODE_EDIT|MODE_TRAPSIG|MODE_ACK)) {
720 output_data(" (0x%x)", pointer[2]);
721 }
722 for (i = 3; i < length; i++) {
723 output_data(" ?0x%x?", pointer[i]);
724 }
725 break;
726 default:
727 output_data("%d (unknown)", pointer[1]);
728 for (i = 2; i < length; i++) {
729 output_data(" %d", pointer[i]);
730 }
731 }
732 break;
733
734 case TELOPT_STATUS: {
735 const char *cp;
736 int j, k;
737
738 output_data("STATUS");
739
740 switch (pointer[1]) {
741 default:
742 if (pointer[1] == TELQUAL_SEND)
743 output_data(" SEND");
744 else
745 output_data(" %d (unknown)", pointer[1]);
746 for (i = 2; i < length; i++) {
747 output_data(" ?%d?", pointer[i]);
748 }
749 break;
750 case TELQUAL_IS:
751 output_data(" IS\r\n");
752
753 for (i = 2; i < length; i++) {
754 switch(pointer[i]) {
755 case DO: cp = "DO"; goto common2;
756 case DONT: cp = "DONT"; goto common2;
757 case WILL: cp = "WILL"; goto common2;
758 case WONT: cp = "WONT"; goto common2;
759 common2:
760 i++;
761 if (TELOPT_OK(pointer[i]))
762 output_data(" %s %s", cp, TELOPT(pointer[i]));
763 else
764 output_data(" %s %d", cp, pointer[i]);
765
766 output_data("\r\n");
767 break;
768
769 case SB:
770 output_data(" SB ");
771 i++;
772 j = k = i;
773 while (j < length) {
774 if (pointer[j] == SE) {
775 if (j+1 == length)
776 break;
777 if (pointer[j+1] == SE)
778 j++;
779 else
780 break;
781 }
782 pointer[k++] = pointer[j++];
783 }
784 printsub(0, &pointer[i], k - i);
785 if (i < length) {
786 output_data(" SE");
787 i = j;
788 } else
789 i = j - 1;
790
791 output_data("\r\n");
792
793 break;
794
795 default:
796 output_data(" %d", pointer[i]);
797 break;
798 }
799 }
800 break;
801 }
802 break;
803 }
804
805 case TELOPT_XDISPLOC:
806 output_data("X-DISPLAY-LOCATION ");
807 switch (pointer[1]) {
808 case TELQUAL_IS:
809 output_data("IS \"%.*s\"", length-2, (char *)pointer+2);
810 break;
811 case TELQUAL_SEND:
812 output_data("SEND");
813 break;
814 default:
815 output_data("- unknown qualifier %d (0x%x).",
816 pointer[1], pointer[1]);
817 }
818 break;
819
820 case TELOPT_NEW_ENVIRON:
821 output_data("NEW-ENVIRON ");
822 goto env_common1;
823 case TELOPT_OLD_ENVIRON:
824 output_data("OLD-ENVIRON");
825 env_common1:
826 switch (pointer[1]) {
827 case TELQUAL_IS:
828 output_data("IS ");
829 goto env_common;
830 case TELQUAL_SEND:
831 output_data("SEND ");
832 goto env_common;
833 case TELQUAL_INFO:
834 output_data("INFO ");
835 env_common:
836 {
837 int noquote = 2;
838 for (i = 2; i < length; i++ ) {
839 switch (pointer[i]) {
840 case NEW_ENV_VAR:
9462167a 841 output_data("%s", "\" VAR " + noquote);
984263bc
MD
842 noquote = 2;
843 break;
844
845 case NEW_ENV_VALUE:
9462167a 846 output_data("%s", "\" VALUE " + noquote);
984263bc
MD
847 noquote = 2;
848 break;
849
850 case ENV_ESC:
9462167a 851 output_data("%s", "\" ESC " + noquote);
984263bc
MD
852 noquote = 2;
853 break;
854
855 case ENV_USERVAR:
9462167a 856 output_data("%s", "\" USERVAR " + noquote);
984263bc
MD
857 noquote = 2;
858 break;
859
860 default:
861 if (isprint(pointer[i]) && pointer[i] != '"') {
862 if (noquote) {
863 output_data("\"");
864 noquote = 0;
865 }
866 output_data("%c", pointer[i]);
867 } else {
868 output_data("\" %03o " + noquote,
869 pointer[i]);
870 noquote = 2;
871 }
872 break;
873 }
874 }
875 if (!noquote)
876 output_data("\"");
877 break;
878 }
879 }
880 break;
881
068e7061
PA
882#ifdef AUTHENTICATION
883 case TELOPT_AUTHENTICATION:
884 output_data("AUTHENTICATION");
885
886 if (length < 2) {
887 output_data(" (empty suboption??\?)");
888 break;
889 }
890 switch (pointer[1]) {
891 case TELQUAL_REPLY:
892 case TELQUAL_IS:
893 output_data(" %s ", (pointer[1] == TELQUAL_IS) ?
894 "IS" : "REPLY");
895 if (AUTHTYPE_NAME_OK(pointer[2]))
896 output_data("%s ", AUTHTYPE_NAME(pointer[2]));
897 else
898 output_data("%d ", pointer[2]);
899 if (length < 3) {
900 output_data("(partial suboption??\?)");
901 break;
902 }
903 output_data("%s|%s",
904 ((pointer[3] & AUTH_WHO_MASK) == AUTH_WHO_CLIENT) ?
905 "CLIENT" : "SERVER",
906 ((pointer[3] & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) ?
907 "MUTUAL" : "ONE-WAY");
908
909 {
910 char buf[512];
911 auth_printsub(&pointer[1], length - 1, buf, sizeof(buf));
912 output_data("%s", buf);
913 }
914 break;
915
916 case TELQUAL_SEND:
917 i = 2;
918 output_data(" SEND ");
919 while (i < length) {
920 if (AUTHTYPE_NAME_OK(pointer[i]))
921 output_data("%s ", AUTHTYPE_NAME(pointer[i]));
922 else
923 output_data("%d ", pointer[i]);
924 if (++i >= length) {
925 output_data("(partial suboption??\?)");
926 break;
927 }
928 output_data("%s|%s ",
929 ((pointer[i] & AUTH_WHO_MASK) == AUTH_WHO_CLIENT) ?
930 "CLIENT" : "SERVER",
931 ((pointer[i] & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) ?
932 "MUTUAL" : "ONE-WAY");
933 ++i;
934 }
935 break;
936
937 case TELQUAL_NAME:
938 output_data(" NAME \"%.*s\"", length - 2, pointer + 2);
939 break;
940
941 default:
942 for (i = 2; i < length; i++) {
943 output_data(" ?%d?", pointer[i]);
944 }
945 break;
946 }
947 break;
948#endif
949
950#ifdef ENCRYPTION
951 case TELOPT_ENCRYPT:
952 output_data("ENCRYPT");
953 if (length < 2) {
954 output_data(" (empty suboption??\?)");
955 break;
956 }
957 switch (pointer[1]) {
958 case ENCRYPT_START:
959 output_data(" START");
960 break;
961
962 case ENCRYPT_END:
963 output_data(" END");
964 break;
965
966 case ENCRYPT_REQSTART:
967 output_data(" REQUEST-START");
968 break;
969
970 case ENCRYPT_REQEND:
971 output_data(" REQUEST-END");
972 break;
984263bc 973
068e7061
PA
974 case ENCRYPT_IS:
975 case ENCRYPT_REPLY:
976 output_data(" %s ", (pointer[1] == ENCRYPT_IS) ?
977 "IS" : "REPLY");
978 if (length < 3) {
979 output_data(" (partial suboption??\?)");
980 break;
981 }
982 if (ENCTYPE_NAME_OK(pointer[2]))
983 output_data("%s ", ENCTYPE_NAME(pointer[2]));
984 else
985 output_data(" %d (unknown)", pointer[2]);
986
987 {
988 char buf[512];
989 encrypt_printsub(&pointer[1], length - 1, buf, sizeof(buf));
990 output_data("%s", buf);
991 }
992 break;
993
994 case ENCRYPT_SUPPORT:
995 i = 2;
996 output_data(" SUPPORT ");
997 while (i < length) {
998 if (ENCTYPE_NAME_OK(pointer[i]))
999 output_data("%s ", ENCTYPE_NAME(pointer[i]));
1000 else
1001 output_data("%d ", pointer[i]);
1002 i++;
1003 }
1004 break;
1005
1006 case ENCRYPT_ENC_KEYID:
1007 output_data(" ENC_KEYID");
1008 goto encommon;
1009
1010 case ENCRYPT_DEC_KEYID:
1011 output_data(" DEC_KEYID");
1012 goto encommon;
1013
1014 default:
1015 output_data(" %d (unknown)", pointer[1]);
1016 encommon:
1017 for (i = 2; i < length; i++) {
1018 output_data(" %d", pointer[i]);
1019 }
1020 break;
1021 }
1022 break;
1023#endif /* ENCRYPTION */
984263bc
MD
1024
1025 default:
1026 if (TELOPT_OK(pointer[0]))
1027 output_data("%s (unknown)", TELOPT(pointer[0]));
1028 else
1029 output_data("%d (unknown)", pointer[i]);
1030 for (i = 1; i < length; i++) {
1031 output_data(" %d", pointer[i]);
1032 }
1033 break;
1034 }
1035 output_data("\r\n");
1036}
1037
1038/*
1039 * Dump a data buffer in hex and ascii to the output data stream.
1040 */
1041void
1042printdata(const char *tag, char *ptr, int cnt)
1043{
1044 int i;
1045 char xbuf[30];
1046
1047 while (cnt) {
1048 /* flush net output buffer if no room for new data) */
1049 if ((&netobuf[BUFSIZ] - nfrontp) < 80) {
1050 netflush();
1051 }
1052
1053 /* add a line of output */
1054 output_data("%s: ", tag);
1055 for (i = 0; i < 20 && cnt; i++) {
1056 output_data("%02x", *ptr);
1057 if (isprint(*ptr)) {
1058 xbuf[i] = *ptr;
1059 } else {
1060 xbuf[i] = '.';
1061 }
1062 if (i % 2) {
1063 output_data(" ");
1064 }
1065 cnt--;
1066 ptr++;
1067 }
1068 xbuf[i] = '\0';
1069 output_data(" %s\r\n", xbuf );
1070 }
1071}
1072#endif /* DIAGNOSTICS */