Move tcpdump-3.9/ to tcpdump/. No need for a versioned dir.
[dragonfly.git] / contrib / tcpdump / print-domain.c
CommitLineData
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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
23static const char rcsid[] _U_ =
66170f0a 24 "@(#) $Header: /tcpdump/master/tcpdump/print-domain.c,v 1.89.2.8 2007/02/13 19:19:27 guy Exp $ (LBL)";
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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
42static 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
48static 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 */
56static const u_char *
57ns_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> */
88static const u_char *
89blabel_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;
119trunc:
120 printf(".../%d]", bitlen);
121 return NULL;
122}
123
124static int
125labellen(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
147static const u_char *
148ns_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> */
231static const u_char *
232ns_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 */
245struct 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
310struct 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 */
319static const u_char *
320ns_qprint(register const u_char *cp, register const u_char *bp, int is_mdns)
321{
322 register const u_char *np = cp;
66170f0a 323 register u_int i, class;
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324
325 cp = ns_nskip(cp);
326
327 if (cp == NULL || !TTEST2(*cp, 4))
328 return(NULL);
329
66170f0a 330 /* print the qtype */
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331 i = EXTRACT_16BITS(cp);
332 cp += 2;
333 printf(" %s", tok2str(ns_type2str, "Type%d", i));
66170f0a 334 /* print the qclass (if it's not IN) */
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335 i = EXTRACT_16BITS(cp);
336 cp += 2;
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337 if (is_mdns)
338 class = (i & ~C_QU);
339 else
340 class = i;
341 if (class != C_IN)
342 printf(" %s", tok2str(ns_class2str, "(Class %d)", class));
343 if (is_mdns) {
344 if (i & C_QU)
345 printf(" (QU)");
346 else
347 printf(" (QM)");
348 }
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349
350 fputs("? ", stdout);
351 cp = ns_nprint(np, bp);
352 return(cp ? cp + 4 : NULL);
353}
354
355/* print a reply */
356static const u_char *
357ns_rprint(register const u_char *cp, register const u_char *bp, int is_mdns)
358{
66170f0a 359 register u_int i, class, opt_flags = 0;
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360 register u_short typ, len;
361 register const u_char *rp;
362
363 if (vflag) {
364 putchar(' ');
365 if ((cp = ns_nprint(cp, bp)) == NULL)
366 return NULL;
367 } else
368 cp = ns_nskip(cp);
369
370 if (cp == NULL || !TTEST2(*cp, 10))
371 return (snapend);
372
66170f0a 373 /* print the type/qtype */
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374 typ = EXTRACT_16BITS(cp);
375 cp += 2;
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PA
376 /* print the class (if it's not IN and the type isn't OPT) */
377 i = EXTRACT_16BITS(cp);
c8cf0f94 378 cp += 2;
66170f0a
PA
379 if (is_mdns)
380 class = (i & ~C_CACHE_FLUSH);
381 else
382 class = i;
383 if (class != C_IN && typ != T_OPT)
c8cf0f94 384 printf(" %s", tok2str(ns_class2str, "(Class %d)", class));
66170f0a
PA
385 if (is_mdns) {
386 if (i & C_CACHE_FLUSH)
387 printf(" (Cache flush)");
388 }
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389
390 /* ignore ttl */
391 cp += 2;
392 /* if T_OPT, save opt_flags */
393 if (typ == T_OPT)
394 opt_flags = EXTRACT_16BITS(cp);
395 /* ignore rest of ttl */
396 cp += 2;
397
398 len = EXTRACT_16BITS(cp);
399 cp += 2;
400
401 rp = cp + len;
402
403 printf(" %s", tok2str(ns_type2str, "Type%d", typ));
404 if (rp > snapend)
405 return(NULL);
406
407 switch (typ) {
408 case T_A:
409 if (!TTEST2(*cp, sizeof(struct in_addr)))
410 return(NULL);
411 printf(" %s", ipaddr_string(cp));
412 break;
413
414 case T_NS:
415 case T_CNAME:
416 case T_PTR:
417#ifdef T_DNAME
418 case T_DNAME:
419#endif
420 putchar(' ');
421 if (ns_nprint(cp, bp) == NULL)
422 return(NULL);
423 break;
424
425 case T_SOA:
426 if (!vflag)
427 break;
428 putchar(' ');
429 if ((cp = ns_nprint(cp, bp)) == NULL)
430 return(NULL);
431 putchar(' ');
432 if ((cp = ns_nprint(cp, bp)) == NULL)
433 return(NULL);
434 if (!TTEST2(*cp, 5 * 4))
435 return(NULL);
436 printf(" %u", EXTRACT_32BITS(cp));
437 cp += 4;
438 printf(" %u", EXTRACT_32BITS(cp));
439 cp += 4;
440 printf(" %u", EXTRACT_32BITS(cp));
441 cp += 4;
442 printf(" %u", EXTRACT_32BITS(cp));
443 cp += 4;
444 printf(" %u", EXTRACT_32BITS(cp));
445 cp += 4;
446 break;
447 case T_MX:
448 putchar(' ');
449 if (!TTEST2(*cp, 2))
450 return(NULL);
451 if (ns_nprint(cp + 2, bp) == NULL)
452 return(NULL);
453 printf(" %d", EXTRACT_16BITS(cp));
454 break;
455
456 case T_TXT:
457 while (cp < rp) {
458 printf(" \"");
459 cp = ns_cprint(cp);
460 if (cp == NULL)
461 return(NULL);
462 putchar('"');
463 }
464 break;
465
466 case T_SRV:
467 putchar(' ');
468 if (!TTEST2(*cp, 6))
469 return(NULL);
470 if (ns_nprint(cp + 6, bp) == NULL)
471 return(NULL);
472 printf(":%d %d %d", EXTRACT_16BITS(cp + 4),
473 EXTRACT_16BITS(cp), EXTRACT_16BITS(cp + 2));
474 break;
475
476#ifdef INET6
477 case T_AAAA:
478 if (!TTEST2(*cp, sizeof(struct in6_addr)))
479 return(NULL);
480 printf(" %s", ip6addr_string(cp));
481 break;
482
483 case T_A6:
484 {
485 struct in6_addr a;
486 int pbit, pbyte;
487
488 if (!TTEST2(*cp, 1))
489 return(NULL);
490 pbit = *cp;
491 pbyte = (pbit & ~7) / 8;
492 if (pbit > 128) {
493 printf(" %u(bad plen)", pbit);
494 break;
495 } else if (pbit < 128) {
496 if (!TTEST2(*(cp + 1), sizeof(a) - pbyte))
497 return(NULL);
498 memset(&a, 0, sizeof(a));
499 memcpy(&a.s6_addr[pbyte], cp + 1, sizeof(a) - pbyte);
500 printf(" %u %s", pbit, ip6addr_string(&a));
501 }
502 if (pbit > 0) {
503 putchar(' ');
504 if (ns_nprint(cp + 1 + sizeof(a) - pbyte, bp) == NULL)
505 return(NULL);
506 }
507 break;
508 }
509#endif /*INET6*/
510
511 case T_OPT:
512 printf(" UDPsize=%u", class);
513 if (opt_flags & 0x8000)
514 printf(" OK");
515 break;
516
517 case T_UNSPECA: /* One long string */
518 if (!TTEST2(*cp, len))
519 return(NULL);
520 if (fn_printn(cp, len, snapend))
521 return(NULL);
522 break;
523
524 case T_TSIG:
525 {
526 if (cp + len > snapend)
527 return(NULL);
528 if (!vflag)
529 break;
530 putchar(' ');
531 if ((cp = ns_nprint(cp, bp)) == NULL)
532 return(NULL);
533 cp += 6;
534 if (!TTEST2(*cp, 2))
535 return(NULL);
536 printf(" fudge=%u", EXTRACT_16BITS(cp));
537 cp += 2;
538 if (!TTEST2(*cp, 2))
539 return(NULL);
540 printf(" maclen=%u", EXTRACT_16BITS(cp));
541 cp += 2 + EXTRACT_16BITS(cp);
542 if (!TTEST2(*cp, 2))
543 return(NULL);
544 printf(" origid=%u", EXTRACT_16BITS(cp));
545 cp += 2;
546 if (!TTEST2(*cp, 2))
547 return(NULL);
548 printf(" error=%u", EXTRACT_16BITS(cp));
549 cp += 2;
550 if (!TTEST2(*cp, 2))
551 return(NULL);
552 printf(" otherlen=%u", EXTRACT_16BITS(cp));
553 cp += 2;
554 }
555 }
556 return (rp); /* XXX This isn't always right */
557}
558
559void
560ns_print(register const u_char *bp, u_int length, int is_mdns)
561{
562 register const HEADER *np;
563 register int qdcount, ancount, nscount, arcount;
564 register const u_char *cp;
565 u_int16_t b2;
566
567 np = (const HEADER *)bp;
568 TCHECK(*np);
569 /* get the byte-order right */
570 qdcount = EXTRACT_16BITS(&np->qdcount);
571 ancount = EXTRACT_16BITS(&np->ancount);
572 nscount = EXTRACT_16BITS(&np->nscount);
573 arcount = EXTRACT_16BITS(&np->arcount);
574
575 if (DNS_QR(np)) {
576 /* this is a response */
66170f0a 577 printf("%d%s%s%s%s%s%s",
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PA
578 EXTRACT_16BITS(&np->id),
579 ns_ops[DNS_OPCODE(np)],
580 ns_resp[DNS_RCODE(np)],
581 DNS_AA(np)? "*" : "",
582 DNS_RA(np)? "" : "-",
583 DNS_TC(np)? "|" : "",
584 DNS_AD(np)? "$" : "");
585
586 if (qdcount != 1)
587 printf(" [%dq]", qdcount);
588 /* Print QUESTION section on -vv */
589 cp = (const u_char *)(np + 1);
590 while (qdcount--) {
591 if (qdcount < EXTRACT_16BITS(&np->qdcount) - 1)
592 putchar(',');
593 if (vflag > 1) {
594 fputs(" q:", stdout);
595 if ((cp = ns_qprint(cp, bp, is_mdns)) == NULL)
596 goto trunc;
597 } else {
598 if ((cp = ns_nskip(cp)) == NULL)
599 goto trunc;
600 cp += 4; /* skip QTYPE and QCLASS */
601 }
602 }
603 printf(" %d/%d/%d", ancount, nscount, arcount);
604 if (ancount--) {
605 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
606 goto trunc;
607 while (cp < snapend && ancount--) {
608 putchar(',');
609 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
610 goto trunc;
611 }
612 }
613 if (ancount > 0)
614 goto trunc;
615 /* Print NS and AR sections on -vv */
616 if (vflag > 1) {
617 if (cp < snapend && nscount--) {
618 fputs(" ns:", stdout);
619 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
620 goto trunc;
621 while (cp < snapend && nscount--) {
622 putchar(',');
623 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
624 goto trunc;
625 }
626 }
627 if (nscount > 0)
628 goto trunc;
629 if (cp < snapend && arcount--) {
630 fputs(" ar:", stdout);
631 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
632 goto trunc;
633 while (cp < snapend && arcount--) {
634 putchar(',');
635 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
636 goto trunc;
637 }
638 }
639 if (arcount > 0)
640 goto trunc;
641 }
642 }
643 else {
644 /* this is a request */
66170f0a 645 printf("%d%s%s%s", EXTRACT_16BITS(&np->id), ns_ops[DNS_OPCODE(np)],
c8cf0f94
PA
646 DNS_RD(np) ? "+" : "",
647 DNS_CD(np) ? "%" : "");
648
649 /* any weirdness? */
650 b2 = EXTRACT_16BITS(((u_short *)np)+1);
651 if (b2 & 0x6cf)
652 printf(" [b2&3=0x%x]", b2);
653
654 if (DNS_OPCODE(np) == IQUERY) {
655 if (qdcount)
656 printf(" [%dq]", qdcount);
657 if (ancount != 1)
658 printf(" [%da]", ancount);
659 }
660 else {
661 if (ancount)
662 printf(" [%da]", ancount);
663 if (qdcount != 1)
664 printf(" [%dq]", qdcount);
665 }
666 if (nscount)
667 printf(" [%dn]", nscount);
668 if (arcount)
669 printf(" [%dau]", arcount);
670
671 cp = (const u_char *)(np + 1);
672 if (qdcount--) {
673 cp = ns_qprint(cp, (const u_char *)np, is_mdns);
674 if (!cp)
675 goto trunc;
676 while (cp < snapend && qdcount--) {
677 cp = ns_qprint((const u_char *)cp,
678 (const u_char *)np,
679 is_mdns);
680 if (!cp)
681 goto trunc;
682 }
683 }
684 if (qdcount > 0)
685 goto trunc;
686
687 /* Print remaining sections on -vv */
688 if (vflag > 1) {
689 if (ancount--) {
690 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
691 goto trunc;
692 while (cp < snapend && ancount--) {
693 putchar(',');
694 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
695 goto trunc;
696 }
697 }
698 if (ancount > 0)
699 goto trunc;
700 if (cp < snapend && nscount--) {
701 fputs(" ns:", stdout);
702 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
703 goto trunc;
704 while (nscount-- && cp < snapend) {
705 putchar(',');
706 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
707 goto trunc;
708 }
709 }
710 if (nscount > 0)
711 goto trunc;
712 if (cp < snapend && arcount--) {
713 fputs(" ar:", stdout);
714 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
715 goto trunc;
716 while (cp < snapend && arcount--) {
717 putchar(',');
718 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
719 goto trunc;
720 }
721 }
722 if (arcount > 0)
723 goto trunc;
724 }
725 }
726 printf(" (%d)", length);
727 return;
728
729 trunc:
730 printf("[|domain]");
731 return;
732}