2 * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
3 * The Regents of the University of California. All rights reserved.
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
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.
25 static const char rcsid[] _U_ =
26 "@(#) $Header: /tcpdump/master/tcpdump/print-domain.c,v 1.98 2007-12-09 01:40:32 guy Exp $ (LBL)";
33 #include <tcpdump-stdinc.h>
40 #include "interface.h"
41 #include "addrtoname.h"
42 #include "extract.h" /* must come after interface.h */
44 static const char *ns_ops[] = {
45 "", " inv_q", " stat", " op3", " notify", " update", " op6", " op7",
46 " op8", " updataA", " updateD", " updateDA",
47 " updateM", " updateMA", " zoneInit", " zoneRef",
50 static const char *ns_resp[] = {
51 "", " FormErr", " ServFail", " NXDomain",
52 " NotImp", " Refused", " YXDomain", " YXRRSet",
53 " NXRRSet", " NotAuth", " NotZone", " Resp11",
54 " Resp12", " Resp13", " Resp14", " NoChange",
57 /* skip over a domain name */
59 ns_nskip(register const u_char *cp)
67 if ((i & INDIR_MASK) == INDIR_MASK)
69 if ((i & INDIR_MASK) == EDNS0_MASK) {
72 if ((i & ~INDIR_MASK) != EDNS0_ELT_BITLABEL)
73 return(NULL); /* unknown ELT */
76 if ((bitlen = *cp++) == 0)
78 bytelen = (bitlen + 7) / 8;
89 /* print a <domain-name> */
91 blabel_print(const u_char *cp)
94 const u_char *bitp, *lim;
99 if ((bitlen = *cp) == 0)
101 slen = (bitlen + 3) / 4;
104 /* print the bit string as a hex string */
106 for (bitp = cp + 1, b = bitlen; bitp < lim && b > 7; b -= 8, bitp++) {
108 printf("%02x", *bitp);
113 printf("%02x", tc & (0xff << (8 - b)));
117 printf("%1x", ((tc >> 4) & 0x0f) & (0x0f << (4 - b)));
119 printf("/%d]", bitlen);
122 printf(".../%d]", bitlen);
127 labellen(const u_char *cp)
134 if ((i & INDIR_MASK) == EDNS0_MASK) {
136 if ((elt = (i & ~INDIR_MASK)) != EDNS0_ELT_BITLABEL) {
137 printf("<ELT %d>", elt);
140 if (!TTEST2(*(cp + 1), 1))
142 if ((bitlen = *(cp + 1)) == 0)
144 return(((bitlen + 7) / 8) + 1);
150 ns_nprint(register const u_char *cp, register const u_char *bp)
153 register const u_char *rp = NULL;
154 register int compress = 0;
157 int data_size = snapend - bp;
159 if ((l = labellen(cp)) == (u_int)-1)
164 if (((i = *cp++) & INDIR_MASK) != INDIR_MASK) {
170 while (i && cp < snapend) {
171 if ((i & INDIR_MASK) == INDIR_MASK) {
178 cp = bp + (((i << 8) | *cp) & 0x3fff);
179 if ((l = labellen(cp)) == (u_int)-1)
187 * If we've looked at every character in
188 * the message, this pointer will make
189 * us look at some character again,
190 * which means we're looping.
192 if (chars_processed >= data_size) {
198 if ((i & INDIR_MASK) == EDNS0_MASK) {
199 elt = (i & ~INDIR_MASK);
201 case EDNS0_ELT_BITLABEL:
202 if (blabel_print(cp) == NULL)
207 printf("<ELT %d>", elt);
211 if (fn_printn(cp, l, snapend))
216 chars_processed += l;
218 if ((l = labellen(cp)) == (u_int)-1)
232 /* print a <character-string> */
233 static const u_char *
234 ns_cprint(register const u_char *cp)
241 if (fn_printn(cp, i, snapend))
246 /* http://www.iana.org/assignments/dns-parameters */
247 struct tok ns_type2str[] = {
248 { T_A, "A" }, /* RFC 1035 */
249 { T_NS, "NS" }, /* RFC 1035 */
250 { T_MD, "MD" }, /* RFC 1035 */
251 { T_MF, "MF" }, /* RFC 1035 */
252 { T_CNAME, "CNAME" }, /* RFC 1035 */
253 { T_SOA, "SOA" }, /* RFC 1035 */
254 { T_MB, "MB" }, /* RFC 1035 */
255 { T_MG, "MG" }, /* RFC 1035 */
256 { T_MR, "MR" }, /* RFC 1035 */
257 { T_NULL, "NULL" }, /* RFC 1035 */
258 { T_WKS, "WKS" }, /* RFC 1035 */
259 { T_PTR, "PTR" }, /* RFC 1035 */
260 { T_HINFO, "HINFO" }, /* RFC 1035 */
261 { T_MINFO, "MINFO" }, /* RFC 1035 */
262 { T_MX, "MX" }, /* RFC 1035 */
263 { T_TXT, "TXT" }, /* RFC 1035 */
264 { T_RP, "RP" }, /* RFC 1183 */
265 { T_AFSDB, "AFSDB" }, /* RFC 1183 */
266 { T_X25, "X25" }, /* RFC 1183 */
267 { T_ISDN, "ISDN" }, /* RFC 1183 */
268 { T_RT, "RT" }, /* RFC 1183 */
269 { T_NSAP, "NSAP" }, /* RFC 1706 */
270 { T_NSAP_PTR, "NSAP_PTR" },
271 { T_SIG, "SIG" }, /* RFC 2535 */
272 { T_KEY, "KEY" }, /* RFC 2535 */
273 { T_PX, "PX" }, /* RFC 2163 */
274 { T_GPOS, "GPOS" }, /* RFC 1712 */
275 { T_AAAA, "AAAA" }, /* RFC 1886 */
276 { T_LOC, "LOC" }, /* RFC 1876 */
277 { T_NXT, "NXT" }, /* RFC 2535 */
278 { T_EID, "EID" }, /* Nimrod */
279 { T_NIMLOC, "NIMLOC" }, /* Nimrod */
280 { T_SRV, "SRV" }, /* RFC 2782 */
281 { T_ATMA, "ATMA" }, /* ATM Forum */
282 { T_NAPTR, "NAPTR" }, /* RFC 2168, RFC 2915 */
283 { T_KX, "KX" }, /* RFC 2230 */
284 { T_CERT, "CERT" }, /* RFC 2538 */
285 { T_A6, "A6" }, /* RFC 2874 */
286 { T_DNAME, "DNAME" }, /* RFC 2672 */
288 { T_OPT, "OPT" }, /* RFC 2671 */
289 { T_APL, "APL" }, /* RFC 3123 */
290 { T_DS, "DS" }, /* RFC 4034 */
291 { T_SSHFP, "SSHFP" }, /* RFC 4255 */
292 { T_IPSECKEY, "IPSECKEY" }, /* RFC 4025 */
293 { T_RRSIG, "RRSIG" }, /* RFC 4034 */
294 { T_NSEC, "NSEC" }, /* RFC 4034 */
295 { T_DNSKEY, "DNSKEY" }, /* RFC 4034 */
296 { T_SPF, "SPF" }, /* RFC-schlitt-spf-classic-02.txt */
297 { T_UINFO, "UINFO" },
300 { T_UNSPEC, "UNSPEC" },
301 { T_UNSPECA, "UNSPECA" },
302 { T_TKEY, "TKEY" }, /* RFC 2930 */
303 { T_TSIG, "TSIG" }, /* RFC 2845 */
304 { T_IXFR, "IXFR" }, /* RFC 1995 */
305 { T_AXFR, "AXFR" }, /* RFC 1035 */
306 { T_MAILB, "MAILB" }, /* RFC 1035 */
307 { T_MAILA, "MAILA" }, /* RFC 1035 */
312 struct tok ns_class2str[] = {
313 { C_IN, "IN" }, /* Not used */
314 { C_CHAOS, "CHAOS" },
321 static const u_char *
322 ns_qprint(register const u_char *cp, register const u_char *bp, int is_mdns)
324 register const u_char *np = cp;
325 register u_int i, class;
329 if (cp == NULL || !TTEST2(*cp, 4))
332 /* print the qtype */
333 i = EXTRACT_16BITS(cp);
335 printf(" %s", tok2str(ns_type2str, "Type%d", i));
336 /* print the qclass (if it's not IN) */
337 i = EXTRACT_16BITS(cp);
344 printf(" %s", tok2str(ns_class2str, "(Class %d)", class));
353 cp = ns_nprint(np, bp);
354 return(cp ? cp + 4 : NULL);
358 static const u_char *
359 ns_rprint(register const u_char *cp, register const u_char *bp, int is_mdns)
361 register u_int i, class, opt_flags = 0;
362 register u_short typ, len;
363 register const u_char *rp;
367 if ((cp = ns_nprint(cp, bp)) == NULL)
372 if (cp == NULL || !TTEST2(*cp, 10))
375 /* print the type/qtype */
376 typ = EXTRACT_16BITS(cp);
378 /* print the class (if it's not IN and the type isn't OPT) */
379 i = EXTRACT_16BITS(cp);
382 class = (i & ~C_CACHE_FLUSH);
385 if (class != C_IN && typ != T_OPT)
386 printf(" %s", tok2str(ns_class2str, "(Class %d)", class));
388 if (i & C_CACHE_FLUSH)
389 printf(" (Cache flush)");
395 opt_flags = EXTRACT_16BITS(cp);
396 /* ignore rest of ttl field */
398 } else if (vflag > 2) {
401 relts_print(EXTRACT_32BITS(cp));
409 len = EXTRACT_16BITS(cp);
414 printf(" %s", tok2str(ns_type2str, "Type%d", typ));
420 if (!TTEST2(*cp, sizeof(struct in_addr)))
422 printf(" %s", intoa(htonl(EXTRACT_32BITS(cp))));
432 if (ns_nprint(cp, bp) == NULL)
440 if ((cp = ns_nprint(cp, bp)) == NULL)
443 if ((cp = ns_nprint(cp, bp)) == NULL)
445 if (!TTEST2(*cp, 5 * 4))
447 printf(" %u", EXTRACT_32BITS(cp));
449 printf(" %u", EXTRACT_32BITS(cp));
451 printf(" %u", EXTRACT_32BITS(cp));
453 printf(" %u", EXTRACT_32BITS(cp));
455 printf(" %u", EXTRACT_32BITS(cp));
462 if (ns_nprint(cp + 2, bp) == NULL)
464 printf(" %d", EXTRACT_16BITS(cp));
481 if (ns_nprint(cp + 6, bp) == NULL)
483 printf(":%d %d %d", EXTRACT_16BITS(cp + 4),
484 EXTRACT_16BITS(cp), EXTRACT_16BITS(cp + 2));
490 struct in6_addr addr;
491 char ntop_buf[INET6_ADDRSTRLEN];
493 if (!TTEST2(*cp, sizeof(struct in6_addr)))
495 memcpy(&addr, cp, sizeof(struct in6_addr));
497 inet_ntop(AF_INET6, &addr, ntop_buf, sizeof(ntop_buf)));
506 char ntop_buf[INET6_ADDRSTRLEN];
511 pbyte = (pbit & ~7) / 8;
513 printf(" %u(bad plen)", pbit);
515 } else if (pbit < 128) {
516 if (!TTEST2(*(cp + 1), sizeof(a) - pbyte))
518 memset(&a, 0, sizeof(a));
519 memcpy(&a.s6_addr[pbyte], cp + 1, sizeof(a) - pbyte);
520 printf(" %u %s", pbit,
521 inet_ntop(AF_INET6, &a, ntop_buf, sizeof(ntop_buf)));
525 if (ns_nprint(cp + 1 + sizeof(a) - pbyte, bp) == NULL)
533 printf(" UDPsize=%u", class);
534 if (opt_flags & 0x8000)
538 case T_UNSPECA: /* One long string */
539 if (!TTEST2(*cp, len))
541 if (fn_printn(cp, len, snapend))
547 if (cp + len > snapend)
552 if ((cp = ns_nprint(cp, bp)) == NULL)
557 printf(" fudge=%u", EXTRACT_16BITS(cp));
561 printf(" maclen=%u", EXTRACT_16BITS(cp));
562 cp += 2 + EXTRACT_16BITS(cp);
565 printf(" origid=%u", EXTRACT_16BITS(cp));
569 printf(" error=%u", EXTRACT_16BITS(cp));
573 printf(" otherlen=%u", EXTRACT_16BITS(cp));
577 return (rp); /* XXX This isn't always right */
581 ns_print(register const u_char *bp, u_int length, int is_mdns)
583 register const HEADER *np;
584 register int qdcount, ancount, nscount, arcount;
585 register const u_char *cp;
588 np = (const HEADER *)bp;
590 /* get the byte-order right */
591 qdcount = EXTRACT_16BITS(&np->qdcount);
592 ancount = EXTRACT_16BITS(&np->ancount);
593 nscount = EXTRACT_16BITS(&np->nscount);
594 arcount = EXTRACT_16BITS(&np->arcount);
597 /* this is a response */
598 printf("%d%s%s%s%s%s%s",
599 EXTRACT_16BITS(&np->id),
600 ns_ops[DNS_OPCODE(np)],
601 ns_resp[DNS_RCODE(np)],
602 DNS_AA(np)? "*" : "",
603 DNS_RA(np)? "" : "-",
604 DNS_TC(np)? "|" : "",
605 DNS_AD(np)? "$" : "");
608 printf(" [%dq]", qdcount);
609 /* Print QUESTION section on -vv */
610 cp = (const u_char *)(np + 1);
612 if (qdcount < EXTRACT_16BITS(&np->qdcount) - 1)
615 fputs(" q:", stdout);
616 if ((cp = ns_qprint(cp, bp, is_mdns)) == NULL)
619 if ((cp = ns_nskip(cp)) == NULL)
621 cp += 4; /* skip QTYPE and QCLASS */
624 printf(" %d/%d/%d", ancount, nscount, arcount);
626 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
628 while (cp < snapend && ancount--) {
630 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
636 /* Print NS and AR sections on -vv */
638 if (cp < snapend && nscount--) {
639 fputs(" ns:", stdout);
640 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
642 while (cp < snapend && nscount--) {
644 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
650 if (cp < snapend && arcount--) {
651 fputs(" ar:", stdout);
652 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
654 while (cp < snapend && arcount--) {
656 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
665 /* this is a request */
666 printf("%d%s%s%s", EXTRACT_16BITS(&np->id), ns_ops[DNS_OPCODE(np)],
667 DNS_RD(np) ? "+" : "",
668 DNS_CD(np) ? "%" : "");
671 b2 = EXTRACT_16BITS(((u_short *)np)+1);
673 printf(" [b2&3=0x%x]", b2);
675 if (DNS_OPCODE(np) == IQUERY) {
677 printf(" [%dq]", qdcount);
679 printf(" [%da]", ancount);
683 printf(" [%da]", ancount);
685 printf(" [%dq]", qdcount);
688 printf(" [%dn]", nscount);
690 printf(" [%dau]", arcount);
692 cp = (const u_char *)(np + 1);
694 cp = ns_qprint(cp, (const u_char *)np, is_mdns);
697 while (cp < snapend && qdcount--) {
698 cp = ns_qprint((const u_char *)cp,
708 /* Print remaining sections on -vv */
711 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
713 while (cp < snapend && ancount--) {
715 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
721 if (cp < snapend && nscount--) {
722 fputs(" ns:", stdout);
723 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
725 while (nscount-- && cp < snapend) {
727 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
733 if (cp < snapend && arcount--) {
734 fputs(" ar:", stdout);
735 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
737 while (cp < snapend && arcount--) {
739 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
747 printf(" (%d)", length);