]> The Tcpdump Group git mirrors - tcpdump/blob - print-domain.c
projects / tcpdump / blob


56e3fbabdb6cdaddbaf6474c4b71e16c7ad30e95
[tcpdump] / print-domain.c
1 /*
2 * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
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: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and
9 * this paragraph in its entirety in the documentation or other materials
10 * provided with the distribution, and (3) all advertising materials mentioning
11 * features or use of this software display the following acknowledgement:
12 * ``This product includes software developed by the University of California,
13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14 * the University nor the names of its contributors may be used to endorse
15 * or promote products derived from this software without specific prior
16 * written permission.
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20 */
21
22 #ifndef lint
23 static const char rcsid[] _U_ =
24 "@(#) $Header: /tcpdump/master/tcpdump/print-domain.c,v 1.89.2.2 2006-04-07 08:48:09 guy Exp $ (LBL)";
25 #endif
26
27 #ifdef HAVE_CONFIG_H
28 #include "config.h"
29 #endif
30
31 #include <tcpdump-stdinc.h>
32
33 #include "nameser.h"
34
35 #include <stdio.h>
36 #include <string.h>
37
38 #include "interface.h"
39 #include "addrtoname.h"
40 #include "extract.h" /* must come after interface.h */
41
42 static const char *ns_ops[] = {
43 "", " inv_q", " stat", " op3", " notify", " update", " op6", " op7",
44 " op8", " updataA", " updateD", " updateDA",
45 " updateM", " updateMA", " zoneInit", " zoneRef",
46 };
47
48 static const char *ns_resp[] = {
49 "", " FormErr", " ServFail", " NXDomain",
50 " NotImp", " Refused", " YXDomain", " YXRRSet",
51 " NXRRSet", " NotAuth", " NotZone", " Resp11",
52 " Resp12", " Resp13", " Resp14", " NoChange",
53 };
54
55 /* skip over a domain name */
56 static const u_char *
57 ns_nskip(register const u_char *cp)
58 {
59 register u_char i;
60
61 if (!TTEST2(*cp, 1))
62 return (NULL);
63 i = *cp++;
64 while (i) {
65 if ((i & INDIR_MASK) == INDIR_MASK)
66 return (cp + 1);
67 if ((i & INDIR_MASK) == EDNS0_MASK) {
68 int bitlen, bytelen;
69
70 if ((i & ~INDIR_MASK) != EDNS0_ELT_BITLABEL)
71 return(NULL); /* unknown ELT */
72 if (!TTEST2(*cp, 1))
73 return (NULL);
74 if ((bitlen = *cp++) == 0)
75 bitlen = 256;
76 bytelen = (bitlen + 7) / 8;
77 cp += bytelen;
78 } else
79 cp += i;
80 if (!TTEST2(*cp, 1))
81 return (NULL);
82 i = *cp++;
83 }
84 return (cp);
85 }
86
87 /* print a <domain-name> */
88 static const u_char *
89 blabel_print(const u_char *cp)
90 {
91 int bitlen, slen, b;
92 const u_char *bitp, *lim;
93 char tc;
94
95 if (!TTEST2(*cp, 1))
96 return(NULL);
97 if ((bitlen = *cp) == 0)
98 bitlen = 256;
99 slen = (bitlen + 3) / 4;
100 lim = cp + 1 + slen;
101
102 /* print the bit string as a hex string */
103 printf("\\[x");
104 for (bitp = cp + 1, b = bitlen; bitp < lim && b > 7; b -= 8, bitp++) {
105 TCHECK(*bitp);
106 printf("%02x", *bitp);
107 }
108 if (b > 4) {
109 TCHECK(*bitp);
110 tc = *bitp++;
111 printf("%02x", tc & (0xff << (8 - b)));
112 } else if (b > 0) {
113 TCHECK(*bitp);
114 tc = *bitp++;
115 printf("%1x", ((tc >> 4) & 0x0f) & (0x0f << (4 - b)));
116 }
117 printf("/%d]", bitlen);
118 return lim;
119 trunc:
120 printf(".../%d]", bitlen);
121 return NULL;
122 }
123
124 static int
125 labellen(const u_char *cp)
126 {
127 register u_int i;
128
129 if (!TTEST2(*cp, 1))
130 return(-1);
131 i = *cp;
132 if ((i & INDIR_MASK) == EDNS0_MASK) {
133 int bitlen, elt;
134 if ((elt = (i & ~INDIR_MASK)) != EDNS0_ELT_BITLABEL) {
135 printf("<ELT %d>", elt);
136 return(-1);
137 }
138 if (!TTEST2(*(cp + 1), 1))
139 return(-1);
140 if ((bitlen = *(cp + 1)) == 0)
141 bitlen = 256;
142 return(((bitlen + 7) / 8) + 1);
143 } else
144 return(i);
145 }
146
147 static const u_char *
148 ns_nprint(register const u_char *cp, register const u_char *bp)
149 {
150 register u_int i, l;
151 register const u_char *rp = NULL;
152 register int compress = 0;
153 int chars_processed;
154 int elt;
155 int data_size = snapend - bp;
156
157 if ((l = labellen(cp)) == (u_int)-1)
158 return(NULL);
159 if (!TTEST2(*cp, 1))
160 return(NULL);
161 chars_processed = 1;
162 if (((i = *cp++) & INDIR_MASK) != INDIR_MASK) {
163 compress = 0;
164 rp = cp + l;
165 }
166
167 if (i != 0)
168 while (i && cp < snapend) {
169 if ((i & INDIR_MASK) == INDIR_MASK) {
170 if (!compress) {
171 rp = cp + 1;
172 compress = 1;
173 }
174 if (!TTEST2(*cp, 1))
175 return(NULL);
176 cp = bp + (((i << 8) | *cp) & 0x3fff);
177 if ((l = labellen(cp)) == (u_int)-1)
178 return(NULL);
179 if (!TTEST2(*cp, 1))
180 return(NULL);
181 i = *cp++;
182 chars_processed++;
183
184 /*
185 * If we've looked at every character in
186 * the message, this pointer will make
187 * us look at some character again,
188 * which means we're looping.
189 */
190 if (chars_processed >= data_size) {
191 printf("<LOOP>");
192 return (NULL);
193 }
194 continue;
195 }
196 if ((i & INDIR_MASK) == EDNS0_MASK) {
197 elt = (i & ~INDIR_MASK);
198 switch(elt) {
199 case EDNS0_ELT_BITLABEL:
200 if (blabel_print(cp) == NULL)
201 return (NULL);
202 break;
203 default:
204 /* unknown ELT */
205 printf("<ELT %d>", elt);
206 return(NULL);
207 }
208 } else {
209 if (fn_printn(cp, l, snapend))
210 return(NULL);
211 }
212
213 cp += l;
214 chars_processed += l;
215 putchar('.');
216 if ((l = labellen(cp)) == (u_int)-1)
217 return(NULL);
218 if (!TTEST2(*cp, 1))
219 return(NULL);
220 i = *cp++;
221 chars_processed++;
222 if (!compress)
223 rp += l + 1;
224 }
225 else
226 putchar('.');
227 return (rp);
228 }
229
230 /* print a <character-string> */
231 static const u_char *
232 ns_cprint(register const u_char *cp)
233 {
234 register u_int i;
235
236 if (!TTEST2(*cp, 1))
237 return (NULL);
238 i = *cp++;
239 if (fn_printn(cp, i, snapend))
240 return (NULL);
241 return (cp + i);
242 }
243
244 /* http://www.iana.org/assignments/dns-parameters */
245 struct tok ns_type2str[] = {
246 { T_A, "A" }, /* RFC 1035 */
247 { T_NS, "NS" }, /* RFC 1035 */
248 { T_MD, "MD" }, /* RFC 1035 */
249 { T_MF, "MF" }, /* RFC 1035 */
250 { T_CNAME, "CNAME" }, /* RFC 1035 */
251 { T_SOA, "SOA" }, /* RFC 1035 */
252 { T_MB, "MB" }, /* RFC 1035 */
253 { T_MG, "MG" }, /* RFC 1035 */
254 { T_MR, "MR" }, /* RFC 1035 */
255 { T_NULL, "NULL" }, /* RFC 1035 */
256 { T_WKS, "WKS" }, /* RFC 1035 */
257 { T_PTR, "PTR" }, /* RFC 1035 */
258 { T_HINFO, "HINFO" }, /* RFC 1035 */
259 { T_MINFO, "MINFO" }, /* RFC 1035 */
260 { T_MX, "MX" }, /* RFC 1035 */
261 { T_TXT, "TXT" }, /* RFC 1035 */
262 { T_RP, "RP" }, /* RFC 1183 */
263 { T_AFSDB, "AFSDB" }, /* RFC 1183 */
264 { T_X25, "X25" }, /* RFC 1183 */
265 { T_ISDN, "ISDN" }, /* RFC 1183 */
266 { T_RT, "RT" }, /* RFC 1183 */
267 { T_NSAP, "NSAP" }, /* RFC 1706 */
268 { T_NSAP_PTR, "NSAP_PTR" },
269 { T_SIG, "SIG" }, /* RFC 2535 */
270 { T_KEY, "KEY" }, /* RFC 2535 */
271 { T_PX, "PX" }, /* RFC 2163 */
272 { T_GPOS, "GPOS" }, /* RFC 1712 */
273 { T_AAAA, "AAAA" }, /* RFC 1886 */
274 { T_LOC, "LOC" }, /* RFC 1876 */
275 { T_NXT, "NXT" }, /* RFC 2535 */
276 { T_EID, "EID" }, /* Nimrod */
277 { T_NIMLOC, "NIMLOC" }, /* Nimrod */
278 { T_SRV, "SRV" }, /* RFC 2782 */
279 { T_ATMA, "ATMA" }, /* ATM Forum */
280 { T_NAPTR, "NAPTR" }, /* RFC 2168, RFC 2915 */
281 { T_KX, "KX" }, /* RFC 2230 */
282 { T_CERT, "CERT" }, /* RFC 2538 */
283 { T_A6, "A6" }, /* RFC 2874 */
284 { T_DNAME, "DNAME" }, /* RFC 2672 */
285 { T_SINK, "SINK" },
286 { T_OPT, "OPT" }, /* RFC 2671 */
287 { T_APL, "APL" }, /* RFC 3123 */
288 { T_DS, "DS" }, /* RFC 4034 */
289 { T_SSHFP, "SSHFP" }, /* RFC 4255 */
290 { T_IPSECKEY, "IPSECKEY" }, /* RFC 4025 */
291 { T_RRSIG, "RRSIG" }, /* RFC 4034 */
292 { T_NSEC, "NSEC" }, /* RFC 4034 */
293 { T_DNSKEY, "DNSKEY" }, /* RFC 4034 */
294 { T_SPF, "SPF" }, /* RFC-schlitt-spf-classic-02.txt */
295 { T_UINFO, "UINFO" },
296 { T_UID, "UID" },
297 { T_GID, "GID" },
298 { T_UNSPEC, "UNSPEC" },
299 { T_UNSPECA, "UNSPECA" },
300 { T_TKEY, "TKEY" }, /* RFC 2930 */
301 { T_TSIG, "TSIG" }, /* RFC 2845 */
302 { T_IXFR, "IXFR" }, /* RFC 1995 */
303 { T_AXFR, "AXFR" }, /* RFC 1035 */
304 { T_MAILB, "MAILB" }, /* RFC 1035 */
305 { T_MAILA, "MAILA" }, /* RFC 1035 */
306 { T_ANY, "ANY" },
307 { 0, NULL }
308 };
309
310 struct tok ns_class2str[] = {
311 { C_IN, "IN" }, /* Not used */
312 { C_CHAOS, "CHAOS" },
313 { C_HS, "HS" },
314 { C_ANY, "ANY" },
315 { 0, NULL }
316 };
317
318 /* print a query */
319 static const u_char *
320 ns_qprint(register const u_char *cp, register const u_char *bp, int is_mdns)
321 {
322 register const u_char *np = cp;
323 register u_int i;
324
325 cp = ns_nskip(cp);
326
327 if (cp == NULL || !TTEST2(*cp, 4))
328 return(NULL);
329
330 /* print the qtype and qclass (if it's not IN) */
331 i = EXTRACT_16BITS(cp);
332 cp += 2;
333 printf(" %s", tok2str(ns_type2str, "Type%d", i));
334 i = EXTRACT_16BITS(cp);
335 cp += 2;
336 if (is_mdns && i == (C_IN|C_CACHE_FLUSH))
337 printf(" (Cache flush)");
338 else if (i != C_IN)
339 printf(" %s", tok2str(ns_class2str, "(Class %d)", i));
340
341 fputs("? ", stdout);
342 cp = ns_nprint(np, bp);
343 return(cp ? cp + 4 : NULL);
344 }
345
346 /* print a reply */
347 static const u_char *
348 ns_rprint(register const u_char *cp, register const u_char *bp, int is_mdns)
349 {
350 register u_int class;
351 register u_short typ, len;
352 register const u_char *rp;
353
354 if (vflag) {
355 putchar(' ');
356 if ((cp = ns_nprint(cp, bp)) == NULL)
357 return NULL;
358 } else
359 cp = ns_nskip(cp);
360
361 if (cp == NULL || !TTEST2(*cp, 10))
362 return (snapend);
363
364 /* print the type/qtype and class (if it's not IN) */
365 typ = EXTRACT_16BITS(cp);
366 cp += 2;
367 class = EXTRACT_16BITS(cp);
368 cp += 2;
369 if (is_mdns && class == (C_IN|C_CACHE_FLUSH))
370 printf(" (Cache flush)");
371 else if (class != C_IN && typ != T_OPT)
372 printf(" %s", tok2str(ns_class2str, "(Class %d)", class));
373
374 /* ignore ttl */
375 cp += 4;
376
377 len = EXTRACT_16BITS(cp);
378 cp += 2;
379
380 rp = cp + len;
381
382 printf(" %s", tok2str(ns_type2str, "Type%d", typ));
383 if (rp > snapend)
384 return(NULL);
385
386 switch (typ) {
387 case T_A:
388 if (!TTEST2(*cp, sizeof(struct in_addr)))
389 return(NULL);
390 printf(" %s", ipaddr_string(cp));
391 break;
392
393 case T_NS:
394 case T_CNAME:
395 case T_PTR:
396 #ifdef T_DNAME
397 case T_DNAME:
398 #endif
399 putchar(' ');
400 if (ns_nprint(cp, bp) == NULL)
401 return(NULL);
402 break;
403
404 case T_SOA:
405 if (!vflag)
406 break;
407 putchar(' ');
408 if ((cp = ns_nprint(cp, bp)) == NULL)
409 return(NULL);
410 putchar(' ');
411 if ((cp = ns_nprint(cp, bp)) == NULL)
412 return(NULL);
413 if (!TTEST2(*cp, 5 * 4))
414 return(NULL);
415 printf(" %u", EXTRACT_32BITS(cp));
416 cp += 4;
417 printf(" %u", EXTRACT_32BITS(cp));
418 cp += 4;
419 printf(" %u", EXTRACT_32BITS(cp));
420 cp += 4;
421 printf(" %u", EXTRACT_32BITS(cp));
422 cp += 4;
423 printf(" %u", EXTRACT_32BITS(cp));
424 cp += 4;
425 break;
426 case T_MX:
427 putchar(' ');
428 if (!TTEST2(*cp, 2))
429 return(NULL);
430 if (ns_nprint(cp + 2, bp) == NULL)
431 return(NULL);
432 printf(" %d", EXTRACT_16BITS(cp));
433 break;
434
435 case T_TXT:
436 while (cp < rp) {
437 printf(" \"");
438 cp = ns_cprint(cp);
439 if (cp == NULL)
440 return(NULL);
441 putchar('"');
442 }
443 break;
444
445 case T_SRV:
446 putchar(' ');
447 if (!TTEST2(*cp, 6))
448 return(NULL);
449 if (ns_nprint(cp + 6, bp) == NULL)
450 return(NULL);
451 printf(":%d %d %d", EXTRACT_16BITS(cp + 4),
452 EXTRACT_16BITS(cp), EXTRACT_16BITS(cp + 2));
453 break;
454
455 #ifdef INET6
456 case T_AAAA:
457 if (!TTEST2(*cp, sizeof(struct in6_addr)))
458 return(NULL);
459 printf(" %s", ip6addr_string(cp));
460 break;
461
462 case T_A6:
463 {
464 struct in6_addr a;
465 int pbit, pbyte;
466
467 if (!TTEST2(*cp, 1))
468 return(NULL);
469 pbit = *cp;
470 pbyte = (pbit & ~7) / 8;
471 if (pbit > 128) {
472 printf(" %u(bad plen)", pbit);
473 break;
474 } else if (pbit < 128) {
475 if (!TTEST2(*(cp + 1), sizeof(a) - pbyte))
476 return(NULL);
477 memset(&a, 0, sizeof(a));
478 memcpy(&a.s6_addr[pbyte], cp + 1, sizeof(a) - pbyte);
479 printf(" %u %s", pbit, ip6addr_string(&a));
480 }
481 if (pbit > 0) {
482 putchar(' ');
483 if (ns_nprint(cp + 1 + sizeof(a) - pbyte, bp) == NULL)
484 return(NULL);
485 }
486 break;
487 }
488 #endif /*INET6*/
489
490 case T_OPT:
491 printf(" UDPsize=%u", class);
492 break;
493
494 case T_UNSPECA: /* One long string */
495 if (!TTEST2(*cp, len))
496 return(NULL);
497 if (fn_printn(cp, len, snapend))
498 return(NULL);
499 break;
500
501 case T_TSIG:
502 {
503 if (cp + len > snapend)
504 return(NULL);
505 if (!vflag)
506 break;
507 putchar(' ');
508 if ((cp = ns_nprint(cp, bp)) == NULL)
509 return(NULL);
510 cp += 6;
511 if (!TTEST2(*cp, 2))
512 return(NULL);
513 printf(" fudge=%u", EXTRACT_16BITS(cp));
514 cp += 2;
515 if (!TTEST2(*cp, 2))
516 return(NULL);
517 printf(" maclen=%u", EXTRACT_16BITS(cp));
518 cp += 2 + EXTRACT_16BITS(cp);
519 if (!TTEST2(*cp, 2))
520 return(NULL);
521 printf(" origid=%u", EXTRACT_16BITS(cp));
522 cp += 2;
523 if (!TTEST2(*cp, 2))
524 return(NULL);
525 printf(" error=%u", EXTRACT_16BITS(cp));
526 cp += 2;
527 if (!TTEST2(*cp, 2))
528 return(NULL);
529 printf(" otherlen=%u", EXTRACT_16BITS(cp));
530 cp += 2;
531 }
532 }
533 return (rp); /* XXX This isn't always right */
534 }
535
536 void
537 ns_print(register const u_char *bp, u_int length, int is_mdns)
538 {
539 register const HEADER *np;
540 register int qdcount, ancount, nscount, arcount;
541 register const u_char *cp;
542 u_int16_t b2;
543
544 np = (const HEADER *)bp;
545 TCHECK(*np);
546 /* get the byte-order right */
547 qdcount = EXTRACT_16BITS(&np->qdcount);
548 ancount = EXTRACT_16BITS(&np->ancount);
549 nscount = EXTRACT_16BITS(&np->nscount);
550 arcount = EXTRACT_16BITS(&np->arcount);
551
552 if (DNS_QR(np)) {
553 /* this is a response */
554 printf(" %d%s%s%s%s%s%s",
555 EXTRACT_16BITS(&np->id),
556 ns_ops[DNS_OPCODE(np)],
557 ns_resp[DNS_RCODE(np)],
558 DNS_AA(np)? "*" : "",
559 DNS_RA(np)? "" : "-",
560 DNS_TC(np)? "|" : "",
561 DNS_AD(np)? "$" : "");
562
563 if (qdcount != 1)
564 printf(" [%dq]", qdcount);
565 /* Print QUESTION section on -vv */
566 cp = (const u_char *)(np + 1);
567 while (qdcount--) {
568 if (qdcount < EXTRACT_16BITS(&np->qdcount) - 1)
569 putchar(',');
570 if (vflag > 1) {
571 fputs(" q:", stdout);
572 if ((cp = ns_qprint(cp, bp, is_mdns)) == NULL)
573 goto trunc;
574 } else {
575 if ((cp = ns_nskip(cp)) == NULL)
576 goto trunc;
577 cp += 4; /* skip QTYPE and QCLASS */
578 }
579 }
580 printf(" %d/%d/%d", ancount, nscount, arcount);
581 if (ancount--) {
582 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
583 goto trunc;
584 while (cp < snapend && ancount--) {
585 putchar(',');
586 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
587 goto trunc;
588 }
589 }
590 if (ancount > 0)
591 goto trunc;
592 /* Print NS and AR sections on -vv */
593 if (vflag > 1) {
594 if (cp < snapend && nscount--) {
595 fputs(" ns:", stdout);
596 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
597 goto trunc;
598 while (cp < snapend && nscount--) {
599 putchar(',');
600 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
601 goto trunc;
602 }
603 }
604 if (nscount > 0)
605 goto trunc;
606 if (cp < snapend && arcount--) {
607 fputs(" ar:", stdout);
608 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
609 goto trunc;
610 while (cp < snapend && arcount--) {
611 putchar(',');
612 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
613 goto trunc;
614 }
615 }
616 if (arcount > 0)
617 goto trunc;
618 }
619 }
620 else {
621 /* this is a request */
622 printf(" %d%s%s%s", EXTRACT_16BITS(&np->id), ns_ops[DNS_OPCODE(np)],
623 DNS_RD(np) ? "+" : "",
624 DNS_CD(np) ? "%" : "");
625
626 /* any weirdness? */
627 b2 = EXTRACT_16BITS(((u_short *)np)+1);
628 if (b2 & 0x6cf)
629 printf(" [b2&3=0x%x]", b2);
630
631 if (DNS_OPCODE(np) == IQUERY) {
632 if (qdcount)
633 printf(" [%dq]", qdcount);
634 if (ancount != 1)
635 printf(" [%da]", ancount);
636 }
637 else {
638 if (ancount)
639 printf(" [%da]", ancount);
640 if (qdcount != 1)
641 printf(" [%dq]", qdcount);
642 }
643 if (nscount)
644 printf(" [%dn]", nscount);
645 if (arcount)
646 printf(" [%dau]", arcount);
647
648 cp = (const u_char *)(np + 1);
649 if (qdcount--) {
650 cp = ns_qprint(cp, (const u_char *)np, is_mdns);
651 if (!cp)
652 goto trunc;
653 while (cp < snapend && qdcount--) {
654 cp = ns_qprint((const u_char *)cp,
655 (const u_char *)np,
656 is_mdns);
657 if (!cp)
658 goto trunc;
659 }
660 }
661 if (qdcount > 0)
662 goto trunc;
663
664 /* Print remaining sections on -vv */
665 if (vflag > 1) {
666 if (ancount--) {
667 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
668 goto trunc;
669 while (cp < snapend && ancount--) {
670 putchar(',');
671 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
672 goto trunc;
673 }
674 }
675 if (ancount > 0)
676 goto trunc;
677 if (cp < snapend && nscount--) {
678 fputs(" ns:", stdout);
679 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
680 goto trunc;
681 while (nscount-- && cp < snapend) {
682 putchar(',');
683 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
684 goto trunc;
685 }
686 }
687 if (nscount > 0)
688 goto trunc;
689 if (cp < snapend && arcount--) {
690 fputs(" ar:", stdout);
691 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
692 goto trunc;
693 while (cp < snapend && arcount--) {
694 putchar(',');
695 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
696 goto trunc;
697 }
698 }
699 if (arcount > 0)
700 goto trunc;
701 }
702 }
703 printf(" (%d)", length);
704 return;
705
706 trunc:
707 printf("[|domain]");
708 return;
709 }
[mirror] the TCPdump network dissector