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.
23 static const char rcsid[] _U_ =
24 "@(#) $Header: /tcpdump/master/tcpdump/print-domain.c,v 1.89.2.1 2005/04/20 20:59:00 guy Exp $ (LBL)";
31 #include <tcpdump-stdinc.h>
38 #include "interface.h"
39 #include "addrtoname.h"
40 #include "extract.h" /* must come after interface.h */
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",
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",
55 /* skip over a domain name */
57 ns_nskip(register const u_char *cp)
65 if ((i & INDIR_MASK) == INDIR_MASK)
67 if ((i & INDIR_MASK) == EDNS0_MASK) {
70 if ((i & ~INDIR_MASK) != EDNS0_ELT_BITLABEL)
71 return(NULL); /* unknown ELT */
74 if ((bitlen = *cp++) == 0)
76 bytelen = (bitlen + 7) / 8;
87 /* print a <domain-name> */
89 blabel_print(const u_char *cp)
92 const u_char *bitp, *lim;
97 if ((bitlen = *cp) == 0)
99 slen = (bitlen + 3) / 4;
102 /* print the bit string as a hex string */
104 for (bitp = cp + 1, b = bitlen; bitp < lim && b > 7; b -= 8, bitp++) {
106 printf("%02x", *bitp);
111 printf("%02x", tc & (0xff << (8 - b)));
115 printf("%1x", ((tc >> 4) & 0x0f) & (0x0f << (4 - b)));
117 printf("/%d]", bitlen);
120 printf(".../%d]", bitlen);
125 labellen(const u_char *cp)
132 if ((i & INDIR_MASK) == EDNS0_MASK) {
134 if ((elt = (i & ~INDIR_MASK)) != EDNS0_ELT_BITLABEL) {
135 printf("<ELT %d>", elt);
138 if (!TTEST2(*(cp + 1), 1))
140 if ((bitlen = *(cp + 1)) == 0)
142 return(((bitlen + 7) / 8) + 1);
147 static const u_char *
148 ns_nprint(register const u_char *cp, register const u_char *bp)
151 register const u_char *rp = NULL;
152 register int compress = 0;
155 int data_size = snapend - bp;
157 if ((l = labellen(cp)) == (u_int)-1)
162 if (((i = *cp++) & INDIR_MASK) != INDIR_MASK) {
168 while (i && cp < snapend) {
169 if ((i & INDIR_MASK) == INDIR_MASK) {
176 cp = bp + (((i << 8) | *cp) & 0x3fff);
177 if ((l = labellen(cp)) == (u_int)-1)
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.
190 if (chars_processed >= data_size) {
196 if ((i & INDIR_MASK) == EDNS0_MASK) {
197 elt = (i & ~INDIR_MASK);
199 case EDNS0_ELT_BITLABEL:
200 if (blabel_print(cp) == NULL)
205 printf("<ELT %d>", elt);
209 if (fn_printn(cp, l, snapend))
214 chars_processed += l;
216 if ((l = labellen(cp)) == (u_int)-1)
230 /* print a <character-string> */
231 static const u_char *
232 ns_cprint(register const u_char *cp)
239 if (fn_printn(cp, i, snapend))
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_A6, "A6" }, /* RFC 2874 */
282 { T_DNAME, "DNAME" }, /* RFC 2672 */
283 { T_OPT, "OPT" }, /* RFC 2671 */
284 { T_UINFO, "UINFO" },
287 { T_UNSPEC, "UNSPEC" },
288 { T_UNSPECA, "UNSPECA" },
289 { T_TKEY, "TKEY" }, /* RFC 2930 */
290 { T_TSIG, "TSIG" }, /* RFC 2845 */
291 { T_IXFR, "IXFR" }, /* RFC 1995 */
292 { T_AXFR, "AXFR" }, /* RFC 1035 */
293 { T_MAILB, "MAILB" }, /* RFC 1035 */
294 { T_MAILA, "MAILA" }, /* RFC 1035 */
299 struct tok ns_class2str[] = {
300 { C_IN, "IN" }, /* Not used */
301 { C_CHAOS, "CHAOS" },
308 static const u_char *
309 ns_qprint(register const u_char *cp, register const u_char *bp, int is_mdns)
311 register const u_char *np = cp;
316 if (cp == NULL || !TTEST2(*cp, 4))
319 /* print the qtype and qclass (if it's not IN) */
320 i = EXTRACT_16BITS(cp);
322 printf(" %s", tok2str(ns_type2str, "Type%d", i));
323 i = EXTRACT_16BITS(cp);
325 if (is_mdns && i == (C_IN|C_CACHE_FLUSH))
326 printf(" (Cache flush)");
328 printf(" %s", tok2str(ns_class2str, "(Class %d)", i));
331 cp = ns_nprint(np, bp);
332 return(cp ? cp + 4 : NULL);
336 static const u_char *
337 ns_rprint(register const u_char *cp, register const u_char *bp, int is_mdns)
339 register u_int class;
340 register u_short typ, len;
341 register const u_char *rp;
345 if ((cp = ns_nprint(cp, bp)) == NULL)
350 if (cp == NULL || !TTEST2(*cp, 10))
353 /* print the type/qtype and class (if it's not IN) */
354 typ = EXTRACT_16BITS(cp);
356 class = EXTRACT_16BITS(cp);
358 if (is_mdns && class == (C_IN|C_CACHE_FLUSH))
359 printf(" (Cache flush)");
360 else if (class != C_IN && typ != T_OPT)
361 printf(" %s", tok2str(ns_class2str, "(Class %d)", class));
366 len = EXTRACT_16BITS(cp);
371 printf(" %s", tok2str(ns_type2str, "Type%d", typ));
377 if (!TTEST2(*cp, sizeof(struct in_addr)))
379 printf(" %s", ipaddr_string(cp));
389 if (ns_nprint(cp, bp) == NULL)
397 if ((cp = ns_nprint(cp, bp)) == NULL)
400 if ((cp = ns_nprint(cp, bp)) == NULL)
402 if (!TTEST2(*cp, 5 * 4))
404 printf(" %u", EXTRACT_32BITS(cp));
406 printf(" %u", EXTRACT_32BITS(cp));
408 printf(" %u", EXTRACT_32BITS(cp));
410 printf(" %u", EXTRACT_32BITS(cp));
412 printf(" %u", EXTRACT_32BITS(cp));
419 if (ns_nprint(cp + 2, bp) == NULL)
421 printf(" %d", EXTRACT_16BITS(cp));
438 if (ns_nprint(cp + 6, bp) == NULL)
440 printf(":%d %d %d", EXTRACT_16BITS(cp + 4),
441 EXTRACT_16BITS(cp), EXTRACT_16BITS(cp + 2));
446 if (!TTEST2(*cp, sizeof(struct in6_addr)))
448 printf(" %s", ip6addr_string(cp));
459 pbyte = (pbit & ~7) / 8;
461 printf(" %u(bad plen)", pbit);
463 } else if (pbit < 128) {
464 if (!TTEST2(*(cp + 1), sizeof(a) - pbyte))
466 memset(&a, 0, sizeof(a));
467 memcpy(&a.s6_addr[pbyte], cp + 1, sizeof(a) - pbyte);
468 printf(" %u %s", pbit, ip6addr_string(&a));
472 if (ns_nprint(cp + 1 + sizeof(a) - pbyte, bp) == NULL)
480 printf(" UDPsize=%u", class);
483 case T_UNSPECA: /* One long string */
484 if (!TTEST2(*cp, len))
486 if (fn_printn(cp, len, snapend))
492 if (cp + len > snapend)
497 if ((cp = ns_nprint(cp, bp)) == NULL)
502 printf(" fudge=%u", EXTRACT_16BITS(cp));
506 printf(" maclen=%u", EXTRACT_16BITS(cp));
507 cp += 2 + EXTRACT_16BITS(cp);
510 printf(" origid=%u", EXTRACT_16BITS(cp));
514 printf(" error=%u", EXTRACT_16BITS(cp));
518 printf(" otherlen=%u", EXTRACT_16BITS(cp));
522 return (rp); /* XXX This isn't always right */
526 ns_print(register const u_char *bp, u_int length, int is_mdns)
528 register const HEADER *np;
529 register int qdcount, ancount, nscount, arcount;
530 register const u_char *cp;
533 np = (const HEADER *)bp;
535 /* get the byte-order right */
536 qdcount = EXTRACT_16BITS(&np->qdcount);
537 ancount = EXTRACT_16BITS(&np->ancount);
538 nscount = EXTRACT_16BITS(&np->nscount);
539 arcount = EXTRACT_16BITS(&np->arcount);
542 /* this is a response */
543 printf(" %d%s%s%s%s%s%s",
544 EXTRACT_16BITS(&np->id),
545 ns_ops[DNS_OPCODE(np)],
546 ns_resp[DNS_RCODE(np)],
547 DNS_AA(np)? "*" : "",
548 DNS_RA(np)? "" : "-",
549 DNS_TC(np)? "|" : "",
550 DNS_AD(np)? "$" : "");
553 printf(" [%dq]", qdcount);
554 /* Print QUESTION section on -vv */
555 cp = (const u_char *)(np + 1);
557 if (qdcount < EXTRACT_16BITS(&np->qdcount) - 1)
560 fputs(" q:", stdout);
561 if ((cp = ns_qprint(cp, bp, is_mdns)) == NULL)
564 if ((cp = ns_nskip(cp)) == NULL)
566 cp += 4; /* skip QTYPE and QCLASS */
569 printf(" %d/%d/%d", ancount, nscount, arcount);
571 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
573 while (cp < snapend && ancount--) {
575 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
581 /* Print NS and AR sections on -vv */
583 if (cp < snapend && nscount--) {
584 fputs(" ns:", stdout);
585 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
587 while (cp < snapend && nscount--) {
589 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
595 if (cp < snapend && arcount--) {
596 fputs(" ar:", stdout);
597 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
599 while (cp < snapend && arcount--) {
601 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
610 /* this is a request */
611 printf(" %d%s%s%s", EXTRACT_16BITS(&np->id), ns_ops[DNS_OPCODE(np)],
612 DNS_RD(np) ? "+" : "",
613 DNS_CD(np) ? "%" : "");
616 b2 = EXTRACT_16BITS(((u_short *)np)+1);
618 printf(" [b2&3=0x%x]", b2);
620 if (DNS_OPCODE(np) == IQUERY) {
622 printf(" [%dq]", qdcount);
624 printf(" [%da]", ancount);
628 printf(" [%da]", ancount);
630 printf(" [%dq]", qdcount);
633 printf(" [%dn]", nscount);
635 printf(" [%dau]", arcount);
637 cp = (const u_char *)(np + 1);
639 cp = ns_qprint(cp, (const u_char *)np, is_mdns);
642 while (cp < snapend && qdcount--) {
643 cp = ns_qprint((const u_char *)cp,
653 /* Print remaining sections on -vv */
656 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
658 while (cp < snapend && ancount--) {
660 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
666 if (cp < snapend && nscount--) {
667 fputs(" ns:", stdout);
668 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
670 while (nscount-- && cp < snapend) {
672 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
678 if (cp < snapend && arcount--) {
679 fputs(" ar:", stdout);
680 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
682 while (cp < snapend && arcount--) {
684 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
692 printf(" (%d)", length);