Initial import from FreeBSD RELENG_4:
[dragonfly.git] / libexec / telnetd / utility.c
CommitLineData
984263bc
MD
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.
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#ifndef lint
35#if 0
36static const char sccsid[] = "@(#)utility.c 8.4 (Berkeley) 5/30/95";
37#endif
38static const char rcsid[] =
39 "$FreeBSD: src/libexec/telnetd/utility.c,v 1.13.2.4 2002/04/13 11:07:12 markm Exp $";
40#endif /* not lint */
41
42#ifdef __FreeBSD__
43#include <locale.h>
44#include <sys/utsname.h>
45#endif
46#include <string.h>
47#define PRINTOPTIONS
48#include "telnetd.h"
49
50
51/*
52 * utility functions performing io related tasks
53 */
54
55/*
56 * ttloop
57 *
58 * A small subroutine to flush the network output buffer, get some data
59 * from the network, and pass it through the telnet state machine. We
60 * also flush the pty input buffer (by dropping its data) if it becomes
61 * too full.
62 */
63
64 void
65ttloop()
66{
67
68 DIAG(TD_REPORT, output_data("td: ttloop\r\n"));
69 if (nfrontp - nbackp > 0) {
70 netflush();
71 }
72 ncc = read(net, netibuf, sizeof netibuf);
73 if (ncc < 0) {
74 syslog(LOG_INFO, "ttloop: read: %m");
75 exit(1);
76 } else if (ncc == 0) {
77 syslog(LOG_INFO, "ttloop: peer died: %m");
78 exit(1);
79 }
80 DIAG(TD_REPORT, output_data("td: ttloop read %d chars\r\n", ncc));
81 netip = netibuf;
82 telrcv(); /* state machine */
83 if (ncc > 0) {
84 pfrontp = pbackp = ptyobuf;
85 telrcv();
86 }
87} /* end of ttloop */
88
89/*
90 * Check a descriptor to see if out of band data exists on it.
91 */
92int
93stilloob(int s)
94{
95 static struct timeval timeout = { 0, 0 };
96 fd_set excepts;
97 int value;
98
99 do {
100 FD_ZERO(&excepts);
101 FD_SET(s, &excepts);
102 memset((char *)&timeout, 0, sizeof timeout);
103 value = select(s+1, (fd_set *)0, (fd_set *)0, &excepts, &timeout);
104 } while ((value == -1) && (errno == EINTR));
105
106 if (value < 0) {
107 fatalperror(pty, "select");
108 }
109 if (FD_ISSET(s, &excepts)) {
110 return 1;
111 } else {
112 return 0;
113 }
114}
115
116void
117ptyflush(void)
118{
119 int n;
120
121 if ((n = pfrontp - pbackp) > 0) {
122 DIAG(TD_REPORT | TD_PTYDATA,
123 output_data("td: ptyflush %d chars\r\n", n));
124 DIAG(TD_PTYDATA, printdata("pd", pbackp, n));
125 n = write(pty, pbackp, n);
126 }
127 if (n < 0) {
128 if (errno == EWOULDBLOCK || errno == EINTR)
129 return;
130 cleanup(0);
131 }
132 pbackp += n;
133 if (pbackp == pfrontp)
134 pbackp = pfrontp = ptyobuf;
135}
136
137/*
138 * nextitem()
139 *
140 * Return the address of the next "item" in the TELNET data
141 * stream. This will be the address of the next character if
142 * the current address is a user data character, or it will
143 * be the address of the character following the TELNET command
144 * if the current address is a TELNET IAC ("I Am a Command")
145 * character.
146 */
147static char *
148nextitem(char *current)
149{
150 if ((*current&0xff) != IAC) {
151 return current+1;
152 }
153 switch (*(current+1)&0xff) {
154 case DO:
155 case DONT:
156 case WILL:
157 case WONT:
158 return current+3;
159 case SB: /* loop forever looking for the SE */
160 {
161 char *look = current+2;
162
163 for (;;) {
164 if ((*look++&0xff) == IAC) {
165 if ((*look++&0xff) == SE) {
166 return look;
167 }
168 }
169 }
170 }
171 default:
172 return current+2;
173 }
174} /* end of nextitem */
175
176/*
177 * netclear()
178 *
179 * We are about to do a TELNET SYNCH operation. Clear
180 * the path to the network.
181 *
182 * Things are a bit tricky since we may have sent the first
183 * byte or so of a previous TELNET command into the network.
184 * So, we have to scan the network buffer from the beginning
185 * until we are up to where we want to be.
186 *
187 * A side effect of what we do, just to keep things
188 * simple, is to clear the urgent data pointer. The principal
189 * caller should be setting the urgent data pointer AFTER calling
190 * us in any case.
191 */
192void
193netclear(void)
194{
195 char *thisitem, *next;
196 char *good;
197#define wewant(p) ((nfrontp > p) && ((*p&0xff) == IAC) && \
198 ((*(p+1)&0xff) != EC) && ((*(p+1)&0xff) != EL))
199
200 thisitem = netobuf;
201
202 while ((next = nextitem(thisitem)) <= nbackp) {
203 thisitem = next;
204 }
205
206 /* Now, thisitem is first before/at boundary. */
207
208 good = netobuf; /* where the good bytes go */
209
210 while (nfrontp > thisitem) {
211 if (wewant(thisitem)) {
212 int length;
213
214 next = thisitem;
215 do {
216 next = nextitem(next);
217 } while (wewant(next) && (nfrontp > next));
218 length = next-thisitem;
219 memmove(good, thisitem, length);
220 good += length;
221 thisitem = next;
222 } else {
223 thisitem = nextitem(thisitem);
224 }
225 }
226
227 nbackp = netobuf;
228 nfrontp = good; /* next byte to be sent */
229 neturg = 0;
230} /* end of netclear */
231
232/*
233 * netflush
234 * Send as much data as possible to the network,
235 * handling requests for urgent data.
236 */
237void
238netflush(void)
239{
240 int n;
241 extern int not42;
242
243 while ((n = nfrontp - nbackp) > 0) {
244#if 0
245 /* XXX This causes output_data() to recurse and die */
246 DIAG(TD_REPORT, {
247 n += output_data("td: netflush %d chars\r\n", n);
248 });
249#endif
250 /*
251 * if no urgent data, or if the other side appears to be an
252 * old 4.2 client (and thus unable to survive TCP urgent data),
253 * write the entire buffer in non-OOB mode.
254 */
255 if ((neturg == 0) || (not42 == 0)) {
256 n = write(net, nbackp, n); /* normal write */
257 } else {
258 n = neturg - nbackp;
259 /*
260 * In 4.2 (and 4.3) systems, there is some question about
261 * what byte in a sendOOB operation is the "OOB" data.
262 * To make ourselves compatible, we only send ONE byte
263 * out of band, the one WE THINK should be OOB (though
264 * we really have more the TCP philosophy of urgent data
265 * rather than the Unix philosophy of OOB data).
266 */
267 if (n > 1) {
268 n = send(net, nbackp, n-1, 0); /* send URGENT all by itself */
269 } else {
270 n = send(net, nbackp, n, MSG_OOB); /* URGENT data */
271 }
272 }
273 if (n == -1) {
274 if (errno == EWOULDBLOCK || errno == EINTR)
275 continue;
276 cleanup(0);
277 /* NOTREACHED */
278 }
279 nbackp += n;
280 if (nbackp >= neturg) {
281 neturg = 0;
282 }
283 if (nbackp == nfrontp) {
284 nbackp = nfrontp = netobuf;
285 }
286 }
287 return;
288} /* end of netflush */
289
290
291/*
292 * miscellaneous functions doing a variety of little jobs follow ...
293 */
294
295
296void
297fatal(int f, const char *msg)
298{
299 char buf[BUFSIZ];
300
301 (void) snprintf(buf, sizeof(buf), "telnetd: %s.\r\n", msg);
302 (void) write(f, buf, (int)strlen(buf));
303 sleep(1); /*XXX*/
304 exit(1);
305}
306
307void
308fatalperror(int f, const char *msg)
309{
310 char buf[BUFSIZ];
311
312 (void) snprintf(buf, sizeof(buf), "%s: %s", msg, strerror(errno));
313 fatal(f, buf);
314}
315
316char editedhost[32];
317
318void
319edithost(char *pat, char *host)
320{
321 char *res = editedhost;
322
323 if (!pat)
324 pat = strdup("");
325 while (*pat) {
326 switch (*pat) {
327
328 case '#':
329 if (*host)
330 host++;
331 break;
332
333 case '@':
334 if (*host)
335 *res++ = *host++;
336 break;
337
338 default:
339 *res++ = *pat;
340 break;
341 }
342 if (res == &editedhost[sizeof editedhost - 1]) {
343 *res = '\0';
344 return;
345 }
346 pat++;
347 }
348 if (*host)
349 (void) strncpy(res, host,
350 sizeof editedhost - (res - editedhost) -1);
351 else
352 *res = '\0';
353 editedhost[sizeof editedhost - 1] = '\0';
354}
355
356static char *putlocation;
357
358static void
359putstr(const char *s)
360{
361
362 while (*s)
363 putchr(*s++);
364}
365
366void
367putchr(int cc)
368{
369 *putlocation++ = cc;
370}
371
372#ifdef __FreeBSD__
373static char fmtstr[] = { "%+" };
374#else
375static char fmtstr[] = { "%l:%M%P on %A, %d %B %Y" };
376#endif
377
378void
379putf(char *cp, char *where)
380{
381 char *slash;
382 time_t t;
383 char db[100];
384#ifdef __FreeBSD__
385 static struct utsname kerninfo;
386
387 if (!*kerninfo.sysname)
388 uname(&kerninfo);
389#endif
390
391 putlocation = where;
392
393 while (*cp) {
394 if (*cp =='\n') {
395 putstr("\r\n");
396 cp++;
397 continue;
398 } else if (*cp != '%') {
399 putchr(*cp++);
400 continue;
401 }
402 switch (*++cp) {
403
404 case 't':
405#ifdef STREAMSPTY
406 /* names are like /dev/pts/2 -- we want pts/2 */
407 slash = strchr(line+1, '/');
408#else
409 slash = strrchr(line, '/');
410#endif
411 if (slash == (char *) 0)
412 putstr(line);
413 else
414 putstr(&slash[1]);
415 break;
416
417 case 'h':
418 putstr(editedhost);
419 break;
420
421 case 'd':
422#ifdef __FreeBSD__
423 setlocale(LC_TIME, "");
424#endif
425 (void)time(&t);
426 (void)strftime(db, sizeof(db), fmtstr, localtime(&t));
427 putstr(db);
428 break;
429
430#ifdef __FreeBSD__
431 case 's':
432 putstr(kerninfo.sysname);
433 break;
434
435 case 'm':
436 putstr(kerninfo.machine);
437 break;
438
439 case 'r':
440 putstr(kerninfo.release);
441 break;
442
443 case 'v':
444 putstr(kerninfo.version);
445 break;
446#endif
447
448 case '%':
449 putchr('%');
450 break;
451 }
452 cp++;
453 }
454}
455
456#ifdef DIAGNOSTICS
457/*
458 * Print telnet options and commands in plain text, if possible.
459 */
460void
461printoption(const char *fmt, int option)
462{
463 if (TELOPT_OK(option))
464 output_data("%s %s\r\n", fmt, TELOPT(option));
465 else if (TELCMD_OK(option))
466 output_data("%s %s\r\n", fmt, TELCMD(option));
467 else
468 output_data("%s %d\r\n", fmt, option);
469 return;
470}
471
472void
473printsub(char direction, unsigned char *pointer, int length)
474{
475 int i = 0;
476
477 if (!(diagnostic & TD_OPTIONS))
478 return;
479
480 if (direction) {
481 output_data("td: %s suboption ",
482 direction == '<' ? "recv" : "send");
483 if (length >= 3) {
484 int j;
485
486 i = pointer[length-2];
487 j = pointer[length-1];
488
489 if (i != IAC || j != SE) {
490 output_data("(terminated by ");
491 if (TELOPT_OK(i))
492 output_data("%s ", TELOPT(i));
493 else if (TELCMD_OK(i))
494 output_data("%s ", TELCMD(i));
495 else
496 output_data("%d ", i);
497 if (TELOPT_OK(j))
498 output_data("%s", TELOPT(j));
499 else if (TELCMD_OK(j))
500 output_data("%s", TELCMD(j));
501 else
502 output_data("%d", j);
503 output_data(", not IAC SE!) ");
504 }
505 }
506 length -= 2;
507 }
508 if (length < 1) {
509 output_data("(Empty suboption??\?)");
510 return;
511 }
512 switch (pointer[0]) {
513 case TELOPT_TTYPE:
514 output_data("TERMINAL-TYPE ");
515 switch (pointer[1]) {
516 case TELQUAL_IS:
517 output_data("IS \"%.*s\"", length-2, (char *)pointer+2);
518 break;
519 case TELQUAL_SEND:
520 output_data("SEND");
521 break;
522 default:
523 output_data(
524 "- unknown qualifier %d (0x%x).",
525 pointer[1], pointer[1]);
526 }
527 break;
528 case TELOPT_TSPEED:
529 output_data("TERMINAL-SPEED");
530 if (length < 2) {
531 output_data(" (empty suboption??\?)");
532 break;
533 }
534 switch (pointer[1]) {
535 case TELQUAL_IS:
536 output_data(" IS %.*s", length-2, (char *)pointer+2);
537 break;
538 default:
539 if (pointer[1] == 1)
540 output_data(" SEND");
541 else
542 output_data(" %d (unknown)", pointer[1]);
543 for (i = 2; i < length; i++) {
544 output_data(" ?%d?", pointer[i]);
545 }
546 break;
547 }
548 break;
549
550 case TELOPT_LFLOW:
551 output_data("TOGGLE-FLOW-CONTROL");
552 if (length < 2) {
553 output_data(" (empty suboption??\?)");
554 break;
555 }
556 switch (pointer[1]) {
557 case LFLOW_OFF:
558 output_data(" OFF"); break;
559 case LFLOW_ON:
560 output_data(" ON"); break;
561 case LFLOW_RESTART_ANY:
562 output_data(" RESTART-ANY"); break;
563 case LFLOW_RESTART_XON:
564 output_data(" RESTART-XON"); break;
565 default:
566 output_data(" %d (unknown)", pointer[1]);
567 }
568 for (i = 2; i < length; i++) {
569 output_data(" ?%d?", pointer[i]);
570 }
571 break;
572
573 case TELOPT_NAWS:
574 output_data("NAWS");
575 if (length < 2) {
576 output_data(" (empty suboption??\?)");
577 break;
578 }
579 if (length == 2) {
580 output_data(" ?%d?", pointer[1]);
581 break;
582 }
583 output_data(" %d %d (%d)",
584 pointer[1], pointer[2],
585 (int)((((unsigned int)pointer[1])<<8)|((unsigned int)pointer[2])));
586 if (length == 4) {
587 output_data(" ?%d?", pointer[3]);
588 break;
589 }
590 output_data(" %d %d (%d)",
591 pointer[3], pointer[4],
592 (int)((((unsigned int)pointer[3])<<8)|((unsigned int)pointer[4])));
593 for (i = 5; i < length; i++) {
594 output_data(" ?%d?", pointer[i]);
595 }
596 break;
597
598 case TELOPT_LINEMODE:
599 output_data("LINEMODE ");
600 if (length < 2) {
601 output_data(" (empty suboption??\?)");
602 break;
603 }
604 switch (pointer[1]) {
605 case WILL:
606 output_data("WILL ");
607 goto common;
608 case WONT:
609 output_data("WONT ");
610 goto common;
611 case DO:
612 output_data("DO ");
613 goto common;
614 case DONT:
615 output_data("DONT ");
616 common:
617 if (length < 3) {
618 output_data("(no option??\?)");
619 break;
620 }
621 switch (pointer[2]) {
622 case LM_FORWARDMASK:
623 output_data("Forward Mask");
624 for (i = 3; i < length; i++) {
625 output_data(" %x", pointer[i]);
626 }
627 break;
628 default:
629 output_data("%d (unknown)", pointer[2]);
630 for (i = 3; i < length; i++) {
631 output_data(" %d", pointer[i]);
632 }
633 break;
634 }
635 break;
636
637 case LM_SLC:
638 output_data("SLC");
639 for (i = 2; i < length - 2; i += 3) {
640 if (SLC_NAME_OK(pointer[i+SLC_FUNC]))
641 output_data(" %s", SLC_NAME(pointer[i+SLC_FUNC]));
642 else
643 output_data(" %d", pointer[i+SLC_FUNC]);
644 switch (pointer[i+SLC_FLAGS]&SLC_LEVELBITS) {
645 case SLC_NOSUPPORT:
646 output_data(" NOSUPPORT"); break;
647 case SLC_CANTCHANGE:
648 output_data(" CANTCHANGE"); break;
649 case SLC_VARIABLE:
650 output_data(" VARIABLE"); break;
651 case SLC_DEFAULT:
652 output_data(" DEFAULT"); break;
653 }
654 output_data("%s%s%s",
655 pointer[i+SLC_FLAGS]&SLC_ACK ? "|ACK" : "",
656 pointer[i+SLC_FLAGS]&SLC_FLUSHIN ? "|FLUSHIN" : "",
657 pointer[i+SLC_FLAGS]&SLC_FLUSHOUT ? "|FLUSHOUT" : "");
658 if (pointer[i+SLC_FLAGS]& ~(SLC_ACK|SLC_FLUSHIN|
659 SLC_FLUSHOUT| SLC_LEVELBITS)) {
660 output_data("(0x%x)", pointer[i+SLC_FLAGS]);
661 }
662 output_data(" %d;", pointer[i+SLC_VALUE]);
663 if ((pointer[i+SLC_VALUE] == IAC) &&
664 (pointer[i+SLC_VALUE+1] == IAC))
665 i++;
666 }
667 for (; i < length; i++) {
668 output_data(" ?%d?", pointer[i]);
669 }
670 break;
671
672 case LM_MODE:
673 output_data("MODE ");
674 if (length < 3) {
675 output_data("(no mode??\?)");
676 break;
677 }
678 {
679 char tbuf[32];
680 sprintf(tbuf, "%s%s%s%s%s",
681 pointer[2]&MODE_EDIT ? "|EDIT" : "",
682 pointer[2]&MODE_TRAPSIG ? "|TRAPSIG" : "",
683 pointer[2]&MODE_SOFT_TAB ? "|SOFT_TAB" : "",
684 pointer[2]&MODE_LIT_ECHO ? "|LIT_ECHO" : "",
685 pointer[2]&MODE_ACK ? "|ACK" : "");
686 output_data("%s", tbuf[1] ? &tbuf[1] : "0");
687 }
688 if (pointer[2]&~(MODE_EDIT|MODE_TRAPSIG|MODE_ACK)) {
689 output_data(" (0x%x)", pointer[2]);
690 }
691 for (i = 3; i < length; i++) {
692 output_data(" ?0x%x?", pointer[i]);
693 }
694 break;
695 default:
696 output_data("%d (unknown)", pointer[1]);
697 for (i = 2; i < length; i++) {
698 output_data(" %d", pointer[i]);
699 }
700 }
701 break;
702
703 case TELOPT_STATUS: {
704 const char *cp;
705 int j, k;
706
707 output_data("STATUS");
708
709 switch (pointer[1]) {
710 default:
711 if (pointer[1] == TELQUAL_SEND)
712 output_data(" SEND");
713 else
714 output_data(" %d (unknown)", pointer[1]);
715 for (i = 2; i < length; i++) {
716 output_data(" ?%d?", pointer[i]);
717 }
718 break;
719 case TELQUAL_IS:
720 output_data(" IS\r\n");
721
722 for (i = 2; i < length; i++) {
723 switch(pointer[i]) {
724 case DO: cp = "DO"; goto common2;
725 case DONT: cp = "DONT"; goto common2;
726 case WILL: cp = "WILL"; goto common2;
727 case WONT: cp = "WONT"; goto common2;
728 common2:
729 i++;
730 if (TELOPT_OK(pointer[i]))
731 output_data(" %s %s", cp, TELOPT(pointer[i]));
732 else
733 output_data(" %s %d", cp, pointer[i]);
734
735 output_data("\r\n");
736 break;
737
738 case SB:
739 output_data(" SB ");
740 i++;
741 j = k = i;
742 while (j < length) {
743 if (pointer[j] == SE) {
744 if (j+1 == length)
745 break;
746 if (pointer[j+1] == SE)
747 j++;
748 else
749 break;
750 }
751 pointer[k++] = pointer[j++];
752 }
753 printsub(0, &pointer[i], k - i);
754 if (i < length) {
755 output_data(" SE");
756 i = j;
757 } else
758 i = j - 1;
759
760 output_data("\r\n");
761
762 break;
763
764 default:
765 output_data(" %d", pointer[i]);
766 break;
767 }
768 }
769 break;
770 }
771 break;
772 }
773
774 case TELOPT_XDISPLOC:
775 output_data("X-DISPLAY-LOCATION ");
776 switch (pointer[1]) {
777 case TELQUAL_IS:
778 output_data("IS \"%.*s\"", length-2, (char *)pointer+2);
779 break;
780 case TELQUAL_SEND:
781 output_data("SEND");
782 break;
783 default:
784 output_data("- unknown qualifier %d (0x%x).",
785 pointer[1], pointer[1]);
786 }
787 break;
788
789 case TELOPT_NEW_ENVIRON:
790 output_data("NEW-ENVIRON ");
791 goto env_common1;
792 case TELOPT_OLD_ENVIRON:
793 output_data("OLD-ENVIRON");
794 env_common1:
795 switch (pointer[1]) {
796 case TELQUAL_IS:
797 output_data("IS ");
798 goto env_common;
799 case TELQUAL_SEND:
800 output_data("SEND ");
801 goto env_common;
802 case TELQUAL_INFO:
803 output_data("INFO ");
804 env_common:
805 {
806 int noquote = 2;
807 for (i = 2; i < length; i++ ) {
808 switch (pointer[i]) {
809 case NEW_ENV_VAR:
810 output_data("\" VAR " + noquote);
811 noquote = 2;
812 break;
813
814 case NEW_ENV_VALUE:
815 output_data("\" VALUE " + noquote);
816 noquote = 2;
817 break;
818
819 case ENV_ESC:
820 output_data("\" ESC " + noquote);
821 noquote = 2;
822 break;
823
824 case ENV_USERVAR:
825 output_data("\" USERVAR " + noquote);
826 noquote = 2;
827 break;
828
829 default:
830 if (isprint(pointer[i]) && pointer[i] != '"') {
831 if (noquote) {
832 output_data("\"");
833 noquote = 0;
834 }
835 output_data("%c", pointer[i]);
836 } else {
837 output_data("\" %03o " + noquote,
838 pointer[i]);
839 noquote = 2;
840 }
841 break;
842 }
843 }
844 if (!noquote)
845 output_data("\"");
846 break;
847 }
848 }
849 break;
850
851
852
853 default:
854 if (TELOPT_OK(pointer[0]))
855 output_data("%s (unknown)", TELOPT(pointer[0]));
856 else
857 output_data("%d (unknown)", pointer[i]);
858 for (i = 1; i < length; i++) {
859 output_data(" %d", pointer[i]);
860 }
861 break;
862 }
863 output_data("\r\n");
864}
865
866/*
867 * Dump a data buffer in hex and ascii to the output data stream.
868 */
869void
870printdata(const char *tag, char *ptr, int cnt)
871{
872 int i;
873 char xbuf[30];
874
875 while (cnt) {
876 /* flush net output buffer if no room for new data) */
877 if ((&netobuf[BUFSIZ] - nfrontp) < 80) {
878 netflush();
879 }
880
881 /* add a line of output */
882 output_data("%s: ", tag);
883 for (i = 0; i < 20 && cnt; i++) {
884 output_data("%02x", *ptr);
885 if (isprint(*ptr)) {
886 xbuf[i] = *ptr;
887 } else {
888 xbuf[i] = '.';
889 }
890 if (i % 2) {
891 output_data(" ");
892 }
893 cnt--;
894 ptr++;
895 }
896 xbuf[i] = '\0';
897 output_data(" %s\r\n", xbuf );
898 }
899}
900#endif /* DIAGNOSTICS */