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remove tcpdump's own CVS keywords
[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 #ifdef HAVE_CONFIG_H
23 #include "config.h"
24 #endif
25
26 #include <tcpdump-stdinc.h>
27
28 #include "nameser.h"
29
30 #include <stdio.h>
31 #include <string.h>
32
33 #include "interface.h"
34 #include "addrtoname.h"
35 #include "extract.h" /* must come after interface.h */
36
37 static const char *ns_ops[] = {
38 "", " inv_q", " stat", " op3", " notify", " update", " op6", " op7",
39 " op8", " updataA", " updateD", " updateDA",
40 " updateM", " updateMA", " zoneInit", " zoneRef",
41 };
42
43 static const char *ns_resp[] = {
44 "", " FormErr", " ServFail", " NXDomain",
45 " NotImp", " Refused", " YXDomain", " YXRRSet",
46 " NXRRSet", " NotAuth", " NotZone", " Resp11",
47 " Resp12", " Resp13", " Resp14", " NoChange",
48 };
49
50 /* skip over a domain name */
51 static const u_char *
52 ns_nskip(register const u_char *cp)
53 {
54 register u_char i;
55
56 if (!TTEST2(*cp, 1))
57 return (NULL);
58 i = *cp++;
59 while (i) {
60 if ((i & INDIR_MASK) == INDIR_MASK)
61 return (cp + 1);
62 if ((i & INDIR_MASK) == EDNS0_MASK) {
63 int bitlen, bytelen;
64
65 if ((i & ~INDIR_MASK) != EDNS0_ELT_BITLABEL)
66 return(NULL); /* unknown ELT */
67 if (!TTEST2(*cp, 1))
68 return (NULL);
69 if ((bitlen = *cp++) == 0)
70 bitlen = 256;
71 bytelen = (bitlen + 7) / 8;
72 cp += bytelen;
73 } else
74 cp += i;
75 if (!TTEST2(*cp, 1))
76 return (NULL);
77 i = *cp++;
78 }
79 return (cp);
80 }
81
82 /* print a <domain-name> */
83 static const u_char *
84 blabel_print(const u_char *cp)
85 {
86 int bitlen, slen, b;
87 const u_char *bitp, *lim;
88 char tc;
89
90 if (!TTEST2(*cp, 1))
91 return(NULL);
92 if ((bitlen = *cp) == 0)
93 bitlen = 256;
94 slen = (bitlen + 3) / 4;
95 lim = cp + 1 + slen;
96
97 /* print the bit string as a hex string */
98 printf("\\[x");
99 for (bitp = cp + 1, b = bitlen; bitp < lim && b > 7; b -= 8, bitp++) {
100 TCHECK(*bitp);
101 printf("%02x", *bitp);
102 }
103 if (b > 4) {
104 TCHECK(*bitp);
105 tc = *bitp++;
106 printf("%02x", tc & (0xff << (8 - b)));
107 } else if (b > 0) {
108 TCHECK(*bitp);
109 tc = *bitp++;
110 printf("%1x", ((tc >> 4) & 0x0f) & (0x0f << (4 - b)));
111 }
112 printf("/%d]", bitlen);
113 return lim;
114 trunc:
115 printf(".../%d]", bitlen);
116 return NULL;
117 }
118
119 static int
120 labellen(const u_char *cp)
121 {
122 register u_int i;
123
124 if (!TTEST2(*cp, 1))
125 return(-1);
126 i = *cp;
127 if ((i & INDIR_MASK) == EDNS0_MASK) {
128 int bitlen, elt;
129 if ((elt = (i & ~INDIR_MASK)) != EDNS0_ELT_BITLABEL) {
130 printf("<ELT %d>", elt);
131 return(-1);
132 }
133 if (!TTEST2(*(cp + 1), 1))
134 return(-1);
135 if ((bitlen = *(cp + 1)) == 0)
136 bitlen = 256;
137 return(((bitlen + 7) / 8) + 1);
138 } else
139 return(i);
140 }
141
142 const u_char *
143 ns_nprint(register const u_char *cp, register const u_char *bp)
144 {
145 register u_int i, l;
146 register const u_char *rp = NULL;
147 register int compress = 0;
148 int chars_processed;
149 int elt;
150 int data_size = snapend - bp;
151
152 if ((l = labellen(cp)) == (u_int)-1)
153 return(NULL);
154 if (!TTEST2(*cp, 1))
155 return(NULL);
156 chars_processed = 1;
157 if (((i = *cp++) & INDIR_MASK) != INDIR_MASK) {
158 compress = 0;
159 rp = cp + l;
160 }
161
162 if (i != 0)
163 while (i && cp < snapend) {
164 if ((i & INDIR_MASK) == INDIR_MASK) {
165 if (!compress) {
166 rp = cp + 1;
167 compress = 1;
168 }
169 if (!TTEST2(*cp, 1))
170 return(NULL);
171 cp = bp + (((i << 8) | *cp) & 0x3fff);
172 if ((l = labellen(cp)) == (u_int)-1)
173 return(NULL);
174 if (!TTEST2(*cp, 1))
175 return(NULL);
176 i = *cp++;
177 chars_processed++;
178
179 /*
180 * If we've looked at every character in
181 * the message, this pointer will make
182 * us look at some character again,
183 * which means we're looping.
184 */
185 if (chars_processed >= data_size) {
186 printf("<LOOP>");
187 return (NULL);
188 }
189 continue;
190 }
191 if ((i & INDIR_MASK) == EDNS0_MASK) {
192 elt = (i & ~INDIR_MASK);
193 switch(elt) {
194 case EDNS0_ELT_BITLABEL:
195 if (blabel_print(cp) == NULL)
196 return (NULL);
197 break;
198 default:
199 /* unknown ELT */
200 printf("<ELT %d>", elt);
201 return(NULL);
202 }
203 } else {
204 if (fn_printn(cp, l, snapend))
205 return(NULL);
206 }
207
208 cp += l;
209 chars_processed += l;
210 putchar('.');
211 if ((l = labellen(cp)) == (u_int)-1)
212 return(NULL);
213 if (!TTEST2(*cp, 1))
214 return(NULL);
215 i = *cp++;
216 chars_processed++;
217 if (!compress)
218 rp += l + 1;
219 }
220 else
221 putchar('.');
222 return (rp);
223 }
224
225 /* print a <character-string> */
226 static const u_char *
227 ns_cprint(register const u_char *cp)
228 {
229 register u_int i;
230
231 if (!TTEST2(*cp, 1))
232 return (NULL);
233 i = *cp++;
234 if (fn_printn(cp, i, snapend))
235 return (NULL);
236 return (cp + i);
237 }
238
239 /* http://www.iana.org/assignments/dns-parameters */
240 const struct tok ns_type2str[] = {
241 { T_A, "A" }, /* RFC 1035 */
242 { T_NS, "NS" }, /* RFC 1035 */
243 { T_MD, "MD" }, /* RFC 1035 */
244 { T_MF, "MF" }, /* RFC 1035 */
245 { T_CNAME, "CNAME" }, /* RFC 1035 */
246 { T_SOA, "SOA" }, /* RFC 1035 */
247 { T_MB, "MB" }, /* RFC 1035 */
248 { T_MG, "MG" }, /* RFC 1035 */
249 { T_MR, "MR" }, /* RFC 1035 */
250 { T_NULL, "NULL" }, /* RFC 1035 */
251 { T_WKS, "WKS" }, /* RFC 1035 */
252 { T_PTR, "PTR" }, /* RFC 1035 */
253 { T_HINFO, "HINFO" }, /* RFC 1035 */
254 { T_MINFO, "MINFO" }, /* RFC 1035 */
255 { T_MX, "MX" }, /* RFC 1035 */
256 { T_TXT, "TXT" }, /* RFC 1035 */
257 { T_RP, "RP" }, /* RFC 1183 */
258 { T_AFSDB, "AFSDB" }, /* RFC 1183 */
259 { T_X25, "X25" }, /* RFC 1183 */
260 { T_ISDN, "ISDN" }, /* RFC 1183 */
261 { T_RT, "RT" }, /* RFC 1183 */
262 { T_NSAP, "NSAP" }, /* RFC 1706 */
263 { T_NSAP_PTR, "NSAP_PTR" },
264 { T_SIG, "SIG" }, /* RFC 2535 */
265 { T_KEY, "KEY" }, /* RFC 2535 */
266 { T_PX, "PX" }, /* RFC 2163 */
267 { T_GPOS, "GPOS" }, /* RFC 1712 */
268 { T_AAAA, "AAAA" }, /* RFC 1886 */
269 { T_LOC, "LOC" }, /* RFC 1876 */
270 { T_NXT, "NXT" }, /* RFC 2535 */
271 { T_EID, "EID" }, /* Nimrod */
272 { T_NIMLOC, "NIMLOC" }, /* Nimrod */
273 { T_SRV, "SRV" }, /* RFC 2782 */
274 { T_ATMA, "ATMA" }, /* ATM Forum */
275 { T_NAPTR, "NAPTR" }, /* RFC 2168, RFC 2915 */
276 { T_KX, "KX" }, /* RFC 2230 */
277 { T_CERT, "CERT" }, /* RFC 2538 */
278 { T_A6, "A6" }, /* RFC 2874 */
279 { T_DNAME, "DNAME" }, /* RFC 2672 */
280 { T_SINK, "SINK" },
281 { T_OPT, "OPT" }, /* RFC 2671 */
282 { T_APL, "APL" }, /* RFC 3123 */
283 { T_DS, "DS" }, /* RFC 4034 */
284 { T_SSHFP, "SSHFP" }, /* RFC 4255 */
285 { T_IPSECKEY, "IPSECKEY" }, /* RFC 4025 */
286 { T_RRSIG, "RRSIG" }, /* RFC 4034 */
287 { T_NSEC, "NSEC" }, /* RFC 4034 */
288 { T_DNSKEY, "DNSKEY" }, /* RFC 4034 */
289 { T_SPF, "SPF" }, /* RFC-schlitt-spf-classic-02.txt */
290 { T_UINFO, "UINFO" },
291 { T_UID, "UID" },
292 { T_GID, "GID" },
293 { T_UNSPEC, "UNSPEC" },
294 { T_UNSPECA, "UNSPECA" },
295 { T_TKEY, "TKEY" }, /* RFC 2930 */
296 { T_TSIG, "TSIG" }, /* RFC 2845 */
297 { T_IXFR, "IXFR" }, /* RFC 1995 */
298 { T_AXFR, "AXFR" }, /* RFC 1035 */
299 { T_MAILB, "MAILB" }, /* RFC 1035 */
300 { T_MAILA, "MAILA" }, /* RFC 1035 */
301 { T_ANY, "ANY" },
302 { 0, NULL }
303 };
304
305 const struct tok ns_class2str[] = {
306 { C_IN, "IN" }, /* Not used */
307 { C_CHAOS, "CHAOS" },
308 { C_HS, "HS" },
309 { C_ANY, "ANY" },
310 { 0, NULL }
311 };
312
313 /* print a query */
314 static const u_char *
315 ns_qprint(register const u_char *cp, register const u_char *bp, int is_mdns)
316 {
317 register const u_char *np = cp;
318 register u_int i, class;
319
320 cp = ns_nskip(cp);
321
322 if (cp == NULL || !TTEST2(*cp, 4))
323 return(NULL);
324
325 /* print the qtype */
326 i = EXTRACT_16BITS(cp);
327 cp += 2;
328 printf(" %s", tok2str(ns_type2str, "Type%d", i));
329 /* print the qclass (if it's not IN) */
330 i = EXTRACT_16BITS(cp);
331 cp += 2;
332 if (is_mdns)
333 class = (i & ~C_QU);
334 else
335 class = i;
336 if (class != C_IN)
337 printf(" %s", tok2str(ns_class2str, "(Class %d)", class));
338 if (is_mdns) {
339 if (i & C_QU)
340 printf(" (QU)");
341 else
342 printf(" (QM)");
343 }
344
345 fputs("? ", stdout);
346 cp = ns_nprint(np, bp);
347 return(cp ? cp + 4 : NULL);
348 }
349
350 /* print a reply */
351 static const u_char *
352 ns_rprint(register const u_char *cp, register const u_char *bp, int is_mdns)
353 {
354 register u_int i, class, opt_flags = 0;
355 register u_short typ, len;
356 register const u_char *rp;
357
358 if (vflag) {
359 putchar(' ');
360 if ((cp = ns_nprint(cp, bp)) == NULL)
361 return NULL;
362 } else
363 cp = ns_nskip(cp);
364
365 if (cp == NULL || !TTEST2(*cp, 10))
366 return (snapend);
367
368 /* print the type/qtype */
369 typ = EXTRACT_16BITS(cp);
370 cp += 2;
371 /* print the class (if it's not IN and the type isn't OPT) */
372 i = EXTRACT_16BITS(cp);
373 cp += 2;
374 if (is_mdns)
375 class = (i & ~C_CACHE_FLUSH);
376 else
377 class = i;
378 if (class != C_IN && typ != T_OPT)
379 printf(" %s", tok2str(ns_class2str, "(Class %d)", class));
380 if (is_mdns) {
381 if (i & C_CACHE_FLUSH)
382 printf(" (Cache flush)");
383 }
384
385 if (typ == T_OPT) {
386 /* get opt flags */
387 cp += 2;
388 opt_flags = EXTRACT_16BITS(cp);
389 /* ignore rest of ttl field */
390 cp += 2;
391 } else if (vflag > 2) {
392 /* print ttl */
393 printf(" [");
394 relts_print(EXTRACT_32BITS(cp));
395 printf("]");
396 cp += 4;
397 } else {
398 /* ignore ttl */
399 cp += 4;
400 }
401
402 len = EXTRACT_16BITS(cp);
403 cp += 2;
404
405 rp = cp + len;
406
407 printf(" %s", tok2str(ns_type2str, "Type%d", typ));
408 if (rp > snapend)
409 return(NULL);
410
411 switch (typ) {
412 case T_A:
413 if (!TTEST2(*cp, sizeof(struct in_addr)))
414 return(NULL);
415 printf(" %s", intoa(htonl(EXTRACT_32BITS(cp))));
416 break;
417
418 case T_NS:
419 case T_CNAME:
420 case T_PTR:
421 #ifdef T_DNAME
422 case T_DNAME:
423 #endif
424 putchar(' ');
425 if (ns_nprint(cp, bp) == NULL)
426 return(NULL);
427 break;
428
429 case T_SOA:
430 if (!vflag)
431 break;
432 putchar(' ');
433 if ((cp = ns_nprint(cp, bp)) == NULL)
434 return(NULL);
435 putchar(' ');
436 if ((cp = ns_nprint(cp, bp)) == NULL)
437 return(NULL);
438 if (!TTEST2(*cp, 5 * 4))
439 return(NULL);
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 printf(" %u", EXTRACT_32BITS(cp));
447 cp += 4;
448 printf(" %u", EXTRACT_32BITS(cp));
449 cp += 4;
450 break;
451 case T_MX:
452 putchar(' ');
453 if (!TTEST2(*cp, 2))
454 return(NULL);
455 if (ns_nprint(cp + 2, bp) == NULL)
456 return(NULL);
457 printf(" %d", EXTRACT_16BITS(cp));
458 break;
459
460 case T_TXT:
461 while (cp < rp) {
462 printf(" \"");
463 cp = ns_cprint(cp);
464 if (cp == NULL)
465 return(NULL);
466 putchar('"');
467 }
468 break;
469
470 case T_SRV:
471 putchar(' ');
472 if (!TTEST2(*cp, 6))
473 return(NULL);
474 if (ns_nprint(cp + 6, bp) == NULL)
475 return(NULL);
476 printf(":%d %d %d", EXTRACT_16BITS(cp + 4),
477 EXTRACT_16BITS(cp), EXTRACT_16BITS(cp + 2));
478 break;
479
480 #ifdef INET6
481 case T_AAAA:
482 {
483 struct in6_addr addr;
484 char ntop_buf[INET6_ADDRSTRLEN];
485
486 if (!TTEST2(*cp, sizeof(struct in6_addr)))
487 return(NULL);
488 memcpy(&addr, cp, sizeof(struct in6_addr));
489 printf(" %s",
490 inet_ntop(AF_INET6, &addr, ntop_buf, sizeof(ntop_buf)));
491
492 break;
493 }
494
495 case T_A6:
496 {
497 struct in6_addr a;
498 int pbit, pbyte;
499 char ntop_buf[INET6_ADDRSTRLEN];
500
501 if (!TTEST2(*cp, 1))
502 return(NULL);
503 pbit = *cp;
504 pbyte = (pbit & ~7) / 8;
505 if (pbit > 128) {
506 printf(" %u(bad plen)", pbit);
507 break;
508 } else if (pbit < 128) {
509 if (!TTEST2(*(cp + 1), sizeof(a) - pbyte))
510 return(NULL);
511 memset(&a, 0, sizeof(a));
512 memcpy(&a.s6_addr[pbyte], cp + 1, sizeof(a) - pbyte);
513 printf(" %u %s", pbit,
514 inet_ntop(AF_INET6, &a, ntop_buf, sizeof(ntop_buf)));
515 }
516 if (pbit > 0) {
517 putchar(' ');
518 if (ns_nprint(cp + 1 + sizeof(a) - pbyte, bp) == NULL)
519 return(NULL);
520 }
521 break;
522 }
523 #endif /*INET6*/
524
525 case T_OPT:
526 printf(" UDPsize=%u", class);
527 if (opt_flags & 0x8000)
528 printf(" OK");
529 break;
530
531 case T_UNSPECA: /* One long string */
532 if (!TTEST2(*cp, len))
533 return(NULL);
534 if (fn_printn(cp, len, snapend))
535 return(NULL);
536 break;
537
538 case T_TSIG:
539 {
540 if (cp + len > snapend)
541 return(NULL);
542 if (!vflag)
543 break;
544 putchar(' ');
545 if ((cp = ns_nprint(cp, bp)) == NULL)
546 return(NULL);
547 cp += 6;
548 if (!TTEST2(*cp, 2))
549 return(NULL);
550 printf(" fudge=%u", EXTRACT_16BITS(cp));
551 cp += 2;
552 if (!TTEST2(*cp, 2))
553 return(NULL);
554 printf(" maclen=%u", EXTRACT_16BITS(cp));
555 cp += 2 + EXTRACT_16BITS(cp);
556 if (!TTEST2(*cp, 2))
557 return(NULL);
558 printf(" origid=%u", EXTRACT_16BITS(cp));
559 cp += 2;
560 if (!TTEST2(*cp, 2))
561 return(NULL);
562 printf(" error=%u", EXTRACT_16BITS(cp));
563 cp += 2;
564 if (!TTEST2(*cp, 2))
565 return(NULL);
566 printf(" otherlen=%u", EXTRACT_16BITS(cp));
567 cp += 2;
568 }
569 }
570 return (rp); /* XXX This isn't always right */
571 }
572
573 void
574 ns_print(register const u_char *bp, u_int length, int is_mdns)
575 {
576 register const HEADER *np;
577 register int qdcount, ancount, nscount, arcount;
578 register const u_char *cp;
579 u_int16_t b2;
580
581 np = (const HEADER *)bp;
582 TCHECK(*np);
583 /* get the byte-order right */
584 qdcount = EXTRACT_16BITS(&np->qdcount);
585 ancount = EXTRACT_16BITS(&np->ancount);
586 nscount = EXTRACT_16BITS(&np->nscount);
587 arcount = EXTRACT_16BITS(&np->arcount);
588
589 if (DNS_QR(np)) {
590 /* this is a response */
591 printf("%d%s%s%s%s%s%s",
592 EXTRACT_16BITS(&np->id),
593 ns_ops[DNS_OPCODE(np)],
594 ns_resp[DNS_RCODE(np)],
595 DNS_AA(np)? "*" : "",
596 DNS_RA(np)? "" : "-",
597 DNS_TC(np)? "|" : "",
598 DNS_AD(np)? "$" : "");
599
600 if (qdcount != 1)
601 printf(" [%dq]", qdcount);
602 /* Print QUESTION section on -vv */
603 cp = (const u_char *)(np + 1);
604 while (qdcount--) {
605 if (qdcount < EXTRACT_16BITS(&np->qdcount) - 1)
606 putchar(',');
607 if (vflag > 1) {
608 fputs(" q:", stdout);
609 if ((cp = ns_qprint(cp, bp, is_mdns)) == NULL)
610 goto trunc;
611 } else {
612 if ((cp = ns_nskip(cp)) == NULL)
613 goto trunc;
614 cp += 4; /* skip QTYPE and QCLASS */
615 }
616 }
617 printf(" %d/%d/%d", ancount, nscount, arcount);
618 if (ancount--) {
619 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
620 goto trunc;
621 while (cp < snapend && ancount--) {
622 putchar(',');
623 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
624 goto trunc;
625 }
626 }
627 if (ancount > 0)
628 goto trunc;
629 /* Print NS and AR sections on -vv */
630 if (vflag > 1) {
631 if (cp < snapend && nscount--) {
632 fputs(" ns:", stdout);
633 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
634 goto trunc;
635 while (cp < snapend && nscount--) {
636 putchar(',');
637 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
638 goto trunc;
639 }
640 }
641 if (nscount > 0)
642 goto trunc;
643 if (cp < snapend && arcount--) {
644 fputs(" ar:", stdout);
645 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
646 goto trunc;
647 while (cp < snapend && arcount--) {
648 putchar(',');
649 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
650 goto trunc;
651 }
652 }
653 if (arcount > 0)
654 goto trunc;
655 }
656 }
657 else {
658 /* this is a request */
659 printf("%d%s%s%s", EXTRACT_16BITS(&np->id), ns_ops[DNS_OPCODE(np)],
660 DNS_RD(np) ? "+" : "",
661 DNS_CD(np) ? "%" : "");
662
663 /* any weirdness? */
664 b2 = EXTRACT_16BITS(((u_short *)np)+1);
665 if (b2 & 0x6cf)
666 printf(" [b2&3=0x%x]", b2);
667
668 if (DNS_OPCODE(np) == IQUERY) {
669 if (qdcount)
670 printf(" [%dq]", qdcount);
671 if (ancount != 1)
672 printf(" [%da]", ancount);
673 }
674 else {
675 if (ancount)
676 printf(" [%da]", ancount);
677 if (qdcount != 1)
678 printf(" [%dq]", qdcount);
679 }
680 if (nscount)
681 printf(" [%dn]", nscount);
682 if (arcount)
683 printf(" [%dau]", arcount);
684
685 cp = (const u_char *)(np + 1);
686 if (qdcount--) {
687 cp = ns_qprint(cp, (const u_char *)np, is_mdns);
688 if (!cp)
689 goto trunc;
690 while (cp < snapend && qdcount--) {
691 cp = ns_qprint((const u_char *)cp,
692 (const u_char *)np,
693 is_mdns);
694 if (!cp)
695 goto trunc;
696 }
697 }
698 if (qdcount > 0)
699 goto trunc;
700
701 /* Print remaining sections on -vv */
702 if (vflag > 1) {
703 if (ancount--) {
704 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
705 goto trunc;
706 while (cp < snapend && ancount--) {
707 putchar(',');
708 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
709 goto trunc;
710 }
711 }
712 if (ancount > 0)
713 goto trunc;
714 if (cp < snapend && nscount--) {
715 fputs(" ns:", stdout);
716 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
717 goto trunc;
718 while (nscount-- && cp < snapend) {
719 putchar(',');
720 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
721 goto trunc;
722 }
723 }
724 if (nscount > 0)
725 goto trunc;
726 if (cp < snapend && arcount--) {
727 fputs(" ar:", stdout);
728 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
729 goto trunc;
730 while (cp < snapend && arcount--) {
731 putchar(',');
732 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
733 goto trunc;
734 }
735 }
736 if (arcount > 0)
737 goto trunc;
738 }
739 }
740 printf(" (%d)", length);
741 return;
742
743 trunc:
744 printf("[|domain]");
745 return;
746 }
[mirror] the TCPdump network dissector