print-domain.c revision 56896
16059Samurai/* 26059Samurai * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997 36059Samurai * The Regents of the University of California. All rights reserved. 46059Samurai * 56059Samurai * Redistribution and use in source and binary forms, with or without 66059Samurai * modification, are permitted provided that: (1) source code distributions 76059Samurai * retain the above copyright notice and this paragraph in its entirety, (2) 86059Samurai * distributions including binary code include the above copyright notice and 96059Samurai * this paragraph in its entirety in the documentation or other materials 106059Samurai * provided with the distribution, and (3) all advertising materials mentioning 116059Samurai * features or use of this software display the following acknowledgement: 126059Samurai * ``This product includes software developed by the University of California, 136059Samurai * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 146059Samurai * the University nor the names of its contributors may be used to endorse 156059Samurai * or promote products derived from this software without specific prior 166059Samurai * written permission. 176059Samurai * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 186059Samurai * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 198857Srgrimes * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 2028679Sbrian * 218857Srgrimes * $FreeBSD: head/contrib/tcpdump/print-domain.c 56896 2000-01-30 01:05:24Z fenner $ 226059Samurai */ 236059Samurai 246059Samurai#ifndef lint 256059Samuraistatic const char rcsid[] = 266059Samurai "@(#) $Header: /tcpdump/master/tcpdump/print-domain.c,v 1.42 1999/11/21 09:36:50 fenner Exp $ (LBL)"; 276059Samurai#endif 286059Samurai 296059Samurai#ifdef HAVE_CONFIG_H 3026142Sbrian#include "config.h" 316059Samurai#endif 3213389Sphk 338857Srgrimes#include <sys/param.h> 346059Samurai#include <sys/time.h> 356059Samurai#include <sys/socket.h> 3626516Sbrian 3728679Sbrian#if __STDC__ 3828679Sbrianstruct mbuf; 3928679Sbrianstruct rtentry; 4026516Sbrian#endif 4126516Sbrian#include <net/if.h> 4226516Sbrian 4326516Sbrian#include <netinet/in.h> 4426516Sbrian#include <net/ethernet.h> 456059Samurai#include <netinet/in_systm.h> 466059Samurai#include <netinet/ip.h> 476059Samurai#include <netinet/ip_var.h> 486059Samurai#include <netinet/udp.h> 496059Samurai#include <netinet/udp_var.h> 506059Samurai#include <netinet/tcp.h> 516059Samurai 526059Samurai#ifdef NOERROR 536059Samurai#undef NOERROR /* Solaris sucks */ 546059Samurai#endif 556059Samurai#ifdef NOERROR 5628679Sbrian#undef T_UNSPEC /* SINIX does too */ 5728679Sbrian#endif 5828461Sbrian#include <arpa/nameser.h> 596059Samurai 606059Samurai#include <stdio.h> 616059Samurai#include <string.h> 626059Samurai 636059Samurai#include "interface.h" 646059Samurai#include "addrtoname.h" 656059Samurai#include "extract.h" /* must come after interface.h */ 666059Samurai 676059Samurai/* Compatibility */ 686059Samurai#ifndef T_TXT 696059Samurai#define T_TXT 16 /* text strings */ 706059Samurai#endif 7113760Sphk#ifndef T_RP 7228679Sbrian#define T_RP 17 /* responsible person */ 7328679Sbrian#endif 7428679Sbrian#ifndef T_AFSDB 7528679Sbrian#define T_AFSDB 18 /* AFS cell database */ 7628679Sbrian#endif 7728679Sbrian#ifndef T_X25 786059Samurai#define T_X25 19 /* X_25 calling address */ 796059Samurai#endif 8025630Sbrian#ifndef T_ISDN 816059Samurai#define T_ISDN 20 /* ISDN calling address */ 826059Samurai#endif 836059Samurai#ifndef T_RT 846059Samurai#define T_RT 21 /* router */ 856059Samurai#endif 8626516Sbrian#ifndef T_NSAP 8726516Sbrian#define T_NSAP 22 /* NSAP address */ 8826516Sbrian#endif 8926516Sbrian#ifndef T_NSAP_PTR 9026516Sbrian#define T_NSAP_PTR 23 /* reverse NSAP lookup (deprecated) */ 9126516Sbrian#endif 9226516Sbrian#ifndef T_SIG 9325630Sbrian#define T_SIG 24 /* security signature */ 946059Samurai#endif 956059Samurai#ifndef T_KEY 966059Samurai#define T_KEY 25 /* security key */ 976059Samurai#endif 986059Samurai#ifndef T_PX 996059Samurai#define T_PX 26 /* X.400 mail mapping */ 1006059Samurai#endif 1016059Samurai#ifndef T_GPOS 1026059Samurai#define T_GPOS 27 /* geographical position (withdrawn) */ 1036059Samurai#endif 1046059Samurai#ifndef T_AAAA 1056059Samurai#define T_AAAA 28 /* IP6 Address */ 1066059Samurai#endif 1076059Samurai#ifndef T_LOC 1086059Samurai#define T_LOC 29 /* Location Information */ 10928679Sbrian#endif 1106059Samurai#ifndef T_NXT 1116735Samurai#define T_NXT 30 /* Next Valid Name in Zone */ 1126059Samurai#endif 1136059Samurai#ifndef T_EID 1146059Samurai#define T_EID 31 /* Endpoint identifier */ 1156059Samurai#endif 11628679Sbrian#ifndef T_NIMLOC 1176059Samurai#define T_NIMLOC 32 /* Nimrod locator */ 1186059Samurai#endif 1196059Samurai#ifndef T_SRV 1206059Samurai#define T_SRV 33 /* Server selection */ 1216059Samurai#endif 12228461Sbrian#ifndef T_ATMA 1236059Samurai#define T_ATMA 34 /* ATM Address */ 12428679Sbrian#endif 12528679Sbrian#ifndef T_NAPTR 1266059Samurai#define T_NAPTR 35 /* Naming Authority PoinTeR */ 1276059Samurai#endif 1286059Samurai#ifndef T_A6 1296059Samurai#define T_A6 38 /* IP6 address (ipngwg-dns-lookups) */ 1306059Samurai#endif 13128679Sbrian 1326059Samurai#ifndef T_UNSPEC 13328679Sbrian#define T_UNSPEC 103 /* Unspecified format (binary data) */ 13428461Sbrian#endif 1356059Samurai#ifndef T_UNSPECA 1366059Samurai#define T_UNSPECA 104 /* "unspecified ascii". Ugly MIT hack */ 1376059Samurai#endif 1386059Samurai 13928679Sbrian#ifndef C_CHAOS 1406059Samurai#define C_CHAOS 3 /* for chaos net (MIT) */ 1416059Samurai#endif 1426059Samurai#ifndef C_HS 1436059Samurai#define C_HS 4 /* for Hesiod name server (MIT) (XXX) */ 1446059Samurai#endif 14528679Sbrian 1466059Samuraistatic char *ns_ops[] = { 14728461Sbrian "", " inv_q", " stat", " op3", " notify", " op5", " op6", " op7", 1486059Samurai " op8", " updataA", " updateD", " updateDA", 1496059Samurai " updateM", " updateMA", " zoneInit", " zoneRef", 1506059Samurai}; 1516059Samurai 15228679Sbrianstatic char *ns_resp[] = { 1536059Samurai "", " FormErr", " ServFail", " NXDomain", 15428679Sbrian " NotImp", " Refused", " Resp6", " Resp7", 1556059Samurai " Resp8", " Resp9", " Resp10", " Resp11", 1566059Samurai " Resp12", " Resp13", " Resp14", " NoChange", 1576059Samurai}; 15828679Sbrian 1596059Samurai/* skip over a domain name */ 16028461Sbrianstatic const u_char * 1616059Samurains_nskip(register const u_char *cp, register const u_char *bp) 1626059Samurai{ 1636059Samurai register u_char i; 16428679Sbrian 1656059Samurai if (((i = *cp++) & INDIR_MASK) == INDIR_MASK) 16628461Sbrian return (cp + 1); 1676059Samurai while (i && cp < snapend) { 1686059Samurai cp += i; 1696059Samurai i = *cp++; 17028679Sbrian } 1716059Samurai return (cp); 17228461Sbrian} 1736059Samurai 1746059Samurai/* print a <domain-name> */ 1756059Samuraistatic const u_char * 1766059Samurains_nprint(register const u_char *cp, register const u_char *bp) 1776059Samurai{ 1786059Samurai register u_int i; 17928679Sbrian register const u_char *rp; 1806059Samurai register int compress; 18128461Sbrian 18228461Sbrian i = *cp++; 18328679Sbrian rp = cp + i; 18428679Sbrian if ((i & INDIR_MASK) == INDIR_MASK) { 1856059Samurai rp = cp + 1; 1866059Samurai compress = 1; 1876059Samurai } else 1886059Samurai compress = 0; 1896059Samurai if (i != 0) 1906059Samurai while (i && cp < snapend) { 19128461Sbrian if ((i & INDIR_MASK) == INDIR_MASK) { 1926059Samurai cp = bp + (((i << 8) | *cp) & 0x3fff); 1936059Samurai i = *cp++; 1946059Samurai continue; 1956059Samurai } 1966059Samurai if (fn_printn(cp, i, snapend)) 1976059Samurai break; 1986059Samurai cp += i; 1996059Samurai putchar('.'); 2006059Samurai i = *cp++; 2016059Samurai if (!compress) 20228679Sbrian rp += i + 1; 2036059Samurai } 2046735Samurai else 2056059Samurai putchar('.'); 2066059Samurai return (rp); 2076059Samurai} 2086059Samurai 2096059Samurai/* print a <character-string> */ 2106059Samuraistatic const u_char * 2116059Samurains_cprint(register const u_char *cp, register const u_char *bp) 2126059Samurai{ 2136059Samurai register u_int i; 2146059Samurai 2156059Samurai i = *cp++; 2166059Samurai (void)fn_printn(cp, i, snapend); 21721488Simp return (cp + i); 2186059Samurai} 21921488Simp 2206059Samuraistatic struct tok type2str[] = { 22128461Sbrian { T_A, "A" }, 2226059Samurai { T_NS, "NS" }, 2236059Samurai { T_MD, "MD" }, 2246059Samurai { T_MF, "MF" }, 2256059Samurai { T_CNAME, "CNAME" }, 2266059Samurai { T_SOA, "SOA" }, 2276059Samurai { T_MB, "MB" }, 2286059Samurai { T_MG, "MG" }, 2296059Samurai { T_MR, "MR" }, 2306059Samurai { T_NULL, "NULL" }, 2316059Samurai { T_WKS, "WKS" }, 2326059Samurai { T_PTR, "PTR" }, 2336059Samurai { T_HINFO, "HINFO" }, 2346059Samurai { T_MINFO, "MINFO" }, 2356059Samurai { T_MX, "MX" }, 2366059Samurai { T_TXT, "TXT" }, 2376059Samurai { T_RP, "RP" }, 2386059Samurai { T_AFSDB, "AFSDB" }, 2396059Samurai { T_X25, "X25" }, 2406059Samurai { T_ISDN, "ISDN" }, 2416059Samurai { T_RT, "RT" }, 2426059Samurai { T_NSAP, "NSAP" }, 2436059Samurai { T_NSAP_PTR, "NSAP_PTR" }, 2446059Samurai { T_SIG, "SIG" }, 2456059Samurai { T_KEY, "KEY" }, 2466059Samurai { T_PX, "PX" }, 2476059Samurai { T_GPOS, "GPOS" }, 2486059Samurai { T_AAAA, "AAAA" }, 2496059Samurai { T_LOC, "LOC " }, 2506059Samurai { T_NXT, "NXT " }, 2516059Samurai { T_EID, "EID " }, 2526059Samurai { T_NIMLOC, "NIMLOC " }, 2536059Samurai { T_SRV, "SRV " }, 2546059Samurai { T_ATMA, "ATMA " }, 2556059Samurai { T_NAPTR, "NAPTR " }, 25628679Sbrian { T_A6, "A6 " }, 2576059Samurai#ifndef T_UINFO 2586059Samurai#define T_UINFO 100 2596059Samurai#endif 2606059Samurai { T_UINFO, "UINFO" }, 26126516Sbrian#ifndef T_UID 2626059Samurai#define T_UID 101 2636059Samurai#endif 2646059Samurai { T_UID, "UID" }, 265#ifndef T_GID 266#define T_GID 102 267#endif 268 { T_GID, "GID" }, 269 { T_UNSPEC, "UNSPEC" }, 270 { T_UNSPECA, "UNSPECA" }, 271 { T_AXFR, "AXFR" }, 272 { T_MAILB, "MAILB" }, 273 { T_MAILA, "MAILA" }, 274 { T_ANY, "ANY" }, 275 { 0, NULL } 276}; 277 278static struct tok class2str[] = { 279 { C_IN, "IN" }, /* Not used */ 280 { C_CHAOS, "CHAOS)" }, 281 { C_HS, "HS" }, 282 { C_ANY, "ANY" }, 283 { 0, NULL } 284}; 285 286/* print a query */ 287static void 288ns_qprint(register const u_char *cp, register const u_char *bp) 289{ 290 register const u_char *np = cp; 291 register u_int i; 292 293 cp = ns_nskip(cp, bp); 294 295 if (cp + 4 > snapend) 296 return; 297 298 /* print the qtype and qclass (if it's not IN) */ 299 i = *cp++ << 8; 300 i |= *cp++; 301 printf(" %s", tok2str(type2str, "Type%d", i)); 302 i = *cp++ << 8; 303 i |= *cp++; 304 if (i != C_IN) 305 printf(" %s", tok2str(class2str, "(Class %d)", i)); 306 307 fputs("? ", stdout); 308 ns_nprint(np, bp); 309} 310 311/* print a reply */ 312static const u_char * 313ns_rprint(register const u_char *cp, register const u_char *bp) 314{ 315 register u_int i; 316 register u_short typ, len; 317 register const u_char *rp; 318 319 if (vflag) { 320 putchar(' '); 321 cp = ns_nprint(cp, bp); 322 } else 323 cp = ns_nskip(cp, bp); 324 325 if (cp + 10 > snapend) 326 return (snapend); 327 328 /* print the type/qtype and class (if it's not IN) */ 329 typ = *cp++ << 8; 330 typ |= *cp++; 331 i = *cp++ << 8; 332 i |= *cp++; 333 if (i != C_IN) 334 printf(" %s", tok2str(class2str, "(Class %d)", i)); 335 336 /* ignore ttl */ 337 cp += 4; 338 339 len = *cp++ << 8; 340 len |= *cp++; 341 342 rp = cp + len; 343 344 printf(" %s", tok2str(type2str, "Type%d", typ)); 345 switch (typ) { 346 347 case T_A: 348 printf(" %s", ipaddr_string(cp)); 349 break; 350 351 case T_NS: 352 case T_CNAME: 353 case T_PTR: 354#ifdef T_DNAME 355 case T_DNAME: /*XXX not checked as there's no server support yet*/ 356#endif 357 putchar(' '); 358 (void)ns_nprint(cp, bp); 359 break; 360 361 case T_MX: 362 putchar(' '); 363 (void)ns_nprint(cp + 2, bp); 364 printf(" %d", EXTRACT_16BITS(cp)); 365 break; 366 367 case T_TXT: 368 putchar(' '); 369 (void)ns_cprint(cp, bp); 370 break; 371 372#ifdef INET6 373 case T_AAAA: 374 printf(" %s", ip6addr_string(cp)); 375 break; 376 377 case T_A6: /*XXX not checked as there's no server support yet*/ 378 { 379 struct in6_addr a; 380 int pbyte; 381 382 pbyte = (*cp + 7) / 8; 383 memset(&a, 0, sizeof(a)); 384 memcpy(&a, cp + 1, pbyte); 385 printf(" %u %s ", *cp, ip6addr_string(&a)); 386 (void)ns_nprint(cp + 1 + pbyte, bp); 387 break; 388 } 389#endif /*INET6*/ 390 391 case T_UNSPECA: /* One long string */ 392 printf(" %.*s", len, cp); 393 break; 394 } 395 return (rp); /* XXX This isn't always right */ 396} 397 398void 399ns_print(register const u_char *bp, u_int length) 400{ 401 register const HEADER *np; 402 register int qdcount, ancount, nscount, arcount; 403 register const u_char *cp; 404 405 np = (const HEADER *)bp; 406 /* get the byte-order right */ 407 qdcount = ntohs(np->qdcount); 408 ancount = ntohs(np->ancount); 409 nscount = ntohs(np->nscount); 410 arcount = ntohs(np->arcount); 411 412 if (np->qr) { 413 /* this is a response */ 414 printf(" %d%s%s%s%s%s", 415 ntohs(np->id), 416 ns_ops[np->opcode], 417 ns_resp[np->rcode], 418 np->aa? "*" : "", 419 np->ra? "" : "-", 420 np->tc? "|" : ""); 421 if (qdcount != 1) 422 printf(" [%dq]", qdcount); 423 /* Print QUESTION section on -vv */ 424 if (vflag > 1) { 425 fputs(" q: ", stdout); 426 cp = ns_nprint((const u_char *)(np + 1), bp); 427 } else 428 cp = ns_nskip((const u_char *)(np + 1), bp); 429 printf(" %d/%d/%d", ancount, nscount, arcount); 430 if (ancount--) { 431 cp = ns_rprint(cp + 4, bp); 432 while (ancount-- && cp < snapend) { 433 putchar(','); 434 cp = ns_rprint(cp, bp); 435 } 436 } 437 } 438 else { 439 /* this is a request */ 440 printf(" %d%s%s", 441 ntohs(np->id), 442 ns_ops[np->opcode], 443 np->rd? "+" : ""); 444 445 /* any weirdness? */ 446 if (*(((u_short *)np)+1) & htons(0x6ff)) 447 printf(" [b2&3=0x%x]", ntohs(*(((u_short *)np)+1))); 448 449 if (np->opcode == IQUERY) { 450 if (qdcount) 451 printf(" [%dq]", qdcount); 452 if (ancount != 1) 453 printf(" [%da]", ancount); 454 } 455 else { 456 if (ancount) 457 printf(" [%da]", ancount); 458 if (qdcount != 1) 459 printf(" [%dq]", qdcount); 460 } 461 if (nscount) 462 printf(" [%dn]", nscount); 463 if (arcount) 464 printf(" [%dau]", arcount); 465 466 ns_qprint((const u_char *)(np + 1), (const u_char *)np); 467 } 468 printf(" (%d)", length); 469} 470