print-domain.c revision 127675
117680Spst/* 239300Sfenner * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997 317680Spst * The Regents of the University of California. All rights reserved. 417680Spst * 517680Spst * Redistribution and use in source and binary forms, with or without 617680Spst * modification, are permitted provided that: (1) source code distributions 717680Spst * retain the above copyright notice and this paragraph in its entirety, (2) 817680Spst * distributions including binary code include the above copyright notice and 917680Spst * this paragraph in its entirety in the documentation or other materials 1017680Spst * provided with the distribution, and (3) all advertising materials mentioning 1117680Spst * features or use of this software display the following acknowledgement: 1217680Spst * ``This product includes software developed by the University of California, 1317680Spst * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 1417680Spst * the University nor the names of its contributors may be used to endorse 1517680Spst * or promote products derived from this software without specific prior 1617680Spst * written permission. 1717680Spst * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 1817680Spst * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 1917680Spst * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 2056896Sfenner * 2156896Sfenner * $FreeBSD: head/contrib/tcpdump/print-domain.c 127675 2004-03-31 14:57:24Z bms $ 2217680Spst */ 2317680Spst 2417680Spst#ifndef lint 25127675Sbmsstatic const char rcsid[] _U_ = 26127675Sbms "@(#) $Header: /tcpdump/master/tcpdump/print-domain.c,v 1.86.2.3 2004/03/28 20:54:00 fenner Exp $ (LBL)"; 2717680Spst#endif 2817680Spst 2956896Sfenner#ifdef HAVE_CONFIG_H 3056896Sfenner#include "config.h" 3156896Sfenner#endif 3256896Sfenner 33127675Sbms#include <tcpdump-stdinc.h> 3417680Spst 3575118Sfenner#include "nameser.h" 3617680Spst 3717680Spst#include <stdio.h> 3856896Sfenner#include <string.h> 3917680Spst 4017680Spst#include "interface.h" 4117680Spst#include "addrtoname.h" 4217680Spst#include "extract.h" /* must come after interface.h */ 4317680Spst 4498527Sfennerstatic const char *ns_ops[] = { 4598527Sfenner "", " inv_q", " stat", " op3", " notify", " update", " op6", " op7", 4617680Spst " op8", " updataA", " updateD", " updateDA", 4717680Spst " updateM", " updateMA", " zoneInit", " zoneRef", 4817680Spst}; 4917680Spst 5098527Sfennerstatic const char *ns_resp[] = { 5117680Spst "", " FormErr", " ServFail", " NXDomain", 5298527Sfenner " NotImp", " Refused", " YXDomain", " YXRRSet", 5398527Sfenner " NXRRSet", " NotAuth", " NotZone", " Resp11", 5417680Spst " Resp12", " Resp13", " Resp14", " NoChange", 5517680Spst}; 5617680Spst 5717680Spst/* skip over a domain name */ 5817680Spststatic const u_char * 59127675Sbmsns_nskip(register const u_char *cp) 6017680Spst{ 6117680Spst register u_char i; 6217680Spst 6398527Sfenner if (!TTEST2(*cp, 1)) 6498527Sfenner return (NULL); 65127675Sbms i = *cp++; 6698527Sfenner while (i) { 67127675Sbms if ((i & INDIR_MASK) == INDIR_MASK) 68127675Sbms return (cp + 1); 6975118Sfenner if ((i & INDIR_MASK) == EDNS0_MASK) { 7075118Sfenner int bitlen, bytelen; 7175118Sfenner 7275118Sfenner if ((i & ~INDIR_MASK) != EDNS0_ELT_BITLABEL) 7375118Sfenner return(NULL); /* unknown ELT */ 7498527Sfenner if (!TTEST2(*cp, 1)) 7598527Sfenner return (NULL); 7675118Sfenner if ((bitlen = *cp++) == 0) 7775118Sfenner bitlen = 256; 7875118Sfenner bytelen = (bitlen + 7) / 8; 7975118Sfenner cp += bytelen; 8075118Sfenner } else 8175118Sfenner cp += i; 8298527Sfenner if (!TTEST2(*cp, 1)) 8398527Sfenner return (NULL); 8417680Spst i = *cp++; 8517680Spst } 8617680Spst return (cp); 8717680Spst} 8817680Spst 8917680Spst/* print a <domain-name> */ 9017680Spststatic const u_char * 9175118Sfennerblabel_print(const u_char *cp) 9217680Spst{ 9375118Sfenner int bitlen, slen, b; 9475118Sfenner const u_char *bitp, *lim; 9575118Sfenner char tc; 9675118Sfenner 9798527Sfenner if (!TTEST2(*cp, 1)) 9875118Sfenner return(NULL); 9975118Sfenner if ((bitlen = *cp) == 0) 10075118Sfenner bitlen = 256; 10175118Sfenner slen = (bitlen + 3) / 4; 102127675Sbms lim = cp + 1 + slen; 10375118Sfenner 10475118Sfenner /* print the bit string as a hex string */ 10575118Sfenner printf("\\[x"); 106127675Sbms for (bitp = cp + 1, b = bitlen; bitp < lim && b > 7; b -= 8, bitp++) { 107127675Sbms TCHECK(*bitp); 10875118Sfenner printf("%02x", *bitp); 109127675Sbms } 110127675Sbms if (b > 4) { 111127675Sbms TCHECK(*bitp); 11275118Sfenner tc = *bitp++; 11375118Sfenner printf("%02x", tc & (0xff << (8 - b))); 11475118Sfenner } else if (b > 0) { 115127675Sbms TCHECK(*bitp); 11675118Sfenner tc = *bitp++; 11775118Sfenner printf("%1x", ((tc >> 4) & 0x0f) & (0x0f << (4 - b))); 11875118Sfenner } 11975118Sfenner printf("/%d]", bitlen); 120127675Sbms return lim; 121127675Sbmstrunc: 122127675Sbms printf(".../%d]", bitlen); 123127675Sbms return NULL; 12475118Sfenner} 12575118Sfenner 12675118Sfennerstatic int 12775118Sfennerlabellen(const u_char *cp) 12875118Sfenner{ 12917680Spst register u_int i; 13017680Spst 13198527Sfenner if (!TTEST2(*cp, 1)) 13275118Sfenner return(-1); 13375118Sfenner i = *cp; 13475118Sfenner if ((i & INDIR_MASK) == EDNS0_MASK) { 13575118Sfenner int bitlen, elt; 13675118Sfenner 13775118Sfenner if ((elt = (i & ~INDIR_MASK)) != EDNS0_ELT_BITLABEL) 13875118Sfenner return(-1); 13998527Sfenner if (!TTEST2(*(cp + 1), 1)) 14075118Sfenner return(-1); 14175118Sfenner if ((bitlen = *(cp + 1)) == 0) 14275118Sfenner bitlen = 256; 14375118Sfenner return(((bitlen + 7) / 8) + 1); 14417680Spst } else 14575118Sfenner return(i); 14675118Sfenner} 14775118Sfenner 14875118Sfennerstatic const u_char * 14975118Sfennerns_nprint(register const u_char *cp, register const u_char *bp) 15075118Sfenner{ 15175118Sfenner register u_int i, l; 15275118Sfenner register const u_char *rp = NULL; 15375118Sfenner register int compress = 0; 15475118Sfenner int chars_processed; 15575118Sfenner int elt; 15675118Sfenner int data_size = snapend - bp; 15775118Sfenner 158127675Sbms if ((l = labellen(cp)) == (u_int)-1) 15975118Sfenner return(NULL); 16098527Sfenner if (!TTEST2(*cp, 1)) 16175118Sfenner return(NULL); 16275118Sfenner chars_processed = 1; 16375118Sfenner if (((i = *cp++) & INDIR_MASK) != INDIR_MASK) { 16417680Spst compress = 0; 16575118Sfenner rp = cp + l; 16675118Sfenner } 16775118Sfenner 16817680Spst if (i != 0) 16917680Spst while (i && cp < snapend) { 17017680Spst if ((i & INDIR_MASK) == INDIR_MASK) { 17175118Sfenner if (!compress) { 17275118Sfenner rp = cp + 1; 17375118Sfenner compress = 1; 17475118Sfenner } 17598527Sfenner if (!TTEST2(*cp, 1)) 17698527Sfenner return(NULL); 17717680Spst cp = bp + (((i << 8) | *cp) & 0x3fff); 178127675Sbms if ((l = labellen(cp)) == (u_int)-1) 17975118Sfenner return(NULL); 18098527Sfenner if (!TTEST2(*cp, 1)) 18198527Sfenner return(NULL); 18217680Spst i = *cp++; 18375118Sfenner chars_processed++; 18475118Sfenner 18575118Sfenner /* 18675118Sfenner * If we've looked at every character in 18775118Sfenner * the message, this pointer will make 18875118Sfenner * us look at some character again, 18975118Sfenner * which means we're looping. 19075118Sfenner */ 19175118Sfenner if (chars_processed >= data_size) { 19275118Sfenner printf("<LOOP>"); 19375118Sfenner return (NULL); 19475118Sfenner } 19517680Spst continue; 19617680Spst } 19775118Sfenner if ((i & INDIR_MASK) == EDNS0_MASK) { 19875118Sfenner elt = (i & ~INDIR_MASK); 19975118Sfenner switch(elt) { 20075118Sfenner case EDNS0_ELT_BITLABEL: 20198527Sfenner if (blabel_print(cp) == NULL) 20298527Sfenner return (NULL); 20375118Sfenner break; 20475118Sfenner default: 20575118Sfenner /* unknown ELT */ 20675118Sfenner printf("<ELT %d>", elt); 20775118Sfenner return(NULL); 20875118Sfenner } 20975118Sfenner } else { 21075118Sfenner if (fn_printn(cp, l, snapend)) 21198527Sfenner return(NULL); 21275118Sfenner } 21375118Sfenner 21475118Sfenner cp += l; 21575118Sfenner chars_processed += l; 21617680Spst putchar('.'); 217127675Sbms if ((l = labellen(cp)) == (u_int)-1) 21875118Sfenner return(NULL); 21998527Sfenner if (!TTEST2(*cp, 1)) 22098527Sfenner return(NULL); 22117680Spst i = *cp++; 22275118Sfenner chars_processed++; 22317680Spst if (!compress) 22475118Sfenner rp += l + 1; 22517680Spst } 22617680Spst else 22717680Spst putchar('.'); 22817680Spst return (rp); 22917680Spst} 23017680Spst 23117680Spst/* print a <character-string> */ 23217680Spststatic const u_char * 233127675Sbmsns_cprint(register const u_char *cp) 23417680Spst{ 23517680Spst register u_int i; 23617680Spst 23798527Sfenner if (!TTEST2(*cp, 1)) 23898527Sfenner return (NULL); 23917680Spst i = *cp++; 24098527Sfenner if (fn_printn(cp, i, snapend)) 24198527Sfenner return (NULL); 24217680Spst return (cp + i); 24317680Spst} 24417680Spst 245127675Sbms/* http://www.iana.org/assignments/dns-parameters */ 24698527Sfennerstruct tok ns_type2str[] = { 247127675Sbms { T_A, "A" }, /* RFC 1035 */ 248127675Sbms { T_NS, "NS" }, /* RFC 1035 */ 249127675Sbms { T_MD, "MD" }, /* RFC 1035 */ 250127675Sbms { T_MF, "MF" }, /* RFC 1035 */ 251127675Sbms { T_CNAME, "CNAME" }, /* RFC 1035 */ 252127675Sbms { T_SOA, "SOA" }, /* RFC 1035 */ 253127675Sbms { T_MB, "MB" }, /* RFC 1035 */ 254127675Sbms { T_MG, "MG" }, /* RFC 1035 */ 255127675Sbms { T_MR, "MR" }, /* RFC 1035 */ 256127675Sbms { T_NULL, "NULL" }, /* RFC 1035 */ 257127675Sbms { T_WKS, "WKS" }, /* RFC 1035 */ 258127675Sbms { T_PTR, "PTR" }, /* RFC 1035 */ 259127675Sbms { T_HINFO, "HINFO" }, /* RFC 1035 */ 260127675Sbms { T_MINFO, "MINFO" }, /* RFC 1035 */ 261127675Sbms { T_MX, "MX" }, /* RFC 1035 */ 262127675Sbms { T_TXT, "TXT" }, /* RFC 1035 */ 263127675Sbms { T_RP, "RP" }, /* RFC 1183 */ 264127675Sbms { T_AFSDB, "AFSDB" }, /* RFC 1183 */ 265127675Sbms { T_X25, "X25" }, /* RFC 1183 */ 266127675Sbms { T_ISDN, "ISDN" }, /* RFC 1183 */ 267127675Sbms { T_RT, "RT" }, /* RFC 1183 */ 268127675Sbms { T_NSAP, "NSAP" }, /* RFC 1706 */ 26917680Spst { T_NSAP_PTR, "NSAP_PTR" }, 270127675Sbms { T_SIG, "SIG" }, /* RFC 2535 */ 271127675Sbms { T_KEY, "KEY" }, /* RFC 2535 */ 272127675Sbms { T_PX, "PX" }, /* RFC 2163 */ 273127675Sbms { T_GPOS, "GPOS" }, /* RFC 1712 */ 274127675Sbms { T_AAAA, "AAAA" }, /* RFC 1886 */ 275127675Sbms { T_LOC, "LOC" }, /* RFC 1876 */ 276127675Sbms { T_NXT, "NXT" }, /* RFC 2535 */ 277127675Sbms { T_EID, "EID" }, /* Nimrod */ 278127675Sbms { T_NIMLOC, "NIMLOC" }, /* Nimrod */ 279127675Sbms { T_SRV, "SRV" }, /* RFC 2782 */ 280127675Sbms { T_ATMA, "ATMA" }, /* ATM Forum */ 281127675Sbms { T_NAPTR, "NAPTR" }, /* RFC 2168, RFC 2915 */ 282127675Sbms { T_A6, "A6" }, /* RFC 2874 */ 283127675Sbms { T_DNAME, "DNAME" }, /* RFC 2672 */ 284127675Sbms { T_OPT, "OPT" }, /* RFC 2671 */ 28539300Sfenner { T_UINFO, "UINFO" }, 28639300Sfenner { T_UID, "UID" }, 28739300Sfenner { T_GID, "GID" }, 28817680Spst { T_UNSPEC, "UNSPEC" }, 28917680Spst { T_UNSPECA, "UNSPECA" }, 290127675Sbms { T_TKEY, "TKEY" }, /* RFC 2930 */ 291127675Sbms { T_TSIG, "TSIG" }, /* RFC 2845 */ 292127675Sbms { T_IXFR, "IXFR" }, /* RFC 1995 */ 293127675Sbms { T_AXFR, "AXFR" }, /* RFC 1035 */ 294127675Sbms { T_MAILB, "MAILB" }, /* RFC 1035 */ 295127675Sbms { T_MAILA, "MAILA" }, /* RFC 1035 */ 29617680Spst { T_ANY, "ANY" }, 29717680Spst { 0, NULL } 29817680Spst}; 29917680Spst 30098527Sfennerstruct tok ns_class2str[] = { 30117680Spst { C_IN, "IN" }, /* Not used */ 30298527Sfenner { C_CHAOS, "CHAOS" }, 30317680Spst { C_HS, "HS" }, 30417680Spst { C_ANY, "ANY" }, 30517680Spst { 0, NULL } 30617680Spst}; 30717680Spst 30817680Spst/* print a query */ 30975118Sfennerstatic const u_char * 310127675Sbmsns_qprint(register const u_char *cp, register const u_char *bp, int is_mdns) 31117680Spst{ 31217680Spst register const u_char *np = cp; 31317680Spst register u_int i; 31417680Spst 315127675Sbms cp = ns_nskip(cp); 31617680Spst 31798527Sfenner if (cp == NULL || !TTEST2(*cp, 4)) 31875118Sfenner return(NULL); 31917680Spst 32017680Spst /* print the qtype and qclass (if it's not IN) */ 321127675Sbms i = EXTRACT_16BITS(cp); 322127675Sbms cp += 2; 32398527Sfenner printf(" %s", tok2str(ns_type2str, "Type%d", i)); 324127675Sbms i = EXTRACT_16BITS(cp); 325127675Sbms cp += 2; 326127675Sbms if (is_mdns && i == (C_IN|C_CACHE_FLUSH)) 327127675Sbms printf(" (Cache flush)"); 328127675Sbms else if (i != C_IN) 32998527Sfenner printf(" %s", tok2str(ns_class2str, "(Class %d)", i)); 33017680Spst 33117680Spst fputs("? ", stdout); 33275118Sfenner cp = ns_nprint(np, bp); 33375118Sfenner return(cp ? cp + 4 : NULL); 33417680Spst} 33517680Spst 33617680Spst/* print a reply */ 33717680Spststatic const u_char * 338127675Sbmsns_rprint(register const u_char *cp, register const u_char *bp, int is_mdns) 33917680Spst{ 34075118Sfenner register u_int class; 34117680Spst register u_short typ, len; 34217680Spst register const u_char *rp; 34317680Spst 34417680Spst if (vflag) { 34517680Spst putchar(' '); 34675118Sfenner if ((cp = ns_nprint(cp, bp)) == NULL) 34775118Sfenner return NULL; 34817680Spst } else 349127675Sbms cp = ns_nskip(cp); 35017680Spst 35198527Sfenner if (cp == NULL || !TTEST2(*cp, 10)) 35217680Spst return (snapend); 35317680Spst 35417680Spst /* print the type/qtype and class (if it's not IN) */ 355127675Sbms typ = EXTRACT_16BITS(cp); 356127675Sbms cp += 2; 357127675Sbms class = EXTRACT_16BITS(cp); 358127675Sbms cp += 2; 359127675Sbms if (is_mdns && class == (C_IN|C_CACHE_FLUSH)) 360127675Sbms printf(" (Cache flush)"); 361127675Sbms else if (class != C_IN && typ != T_OPT) 36298527Sfenner printf(" %s", tok2str(ns_class2str, "(Class %d)", class)); 36317680Spst 36417680Spst /* ignore ttl */ 36517680Spst cp += 4; 36617680Spst 367127675Sbms len = EXTRACT_16BITS(cp); 368127675Sbms cp += 2; 36917680Spst 37017680Spst rp = cp + len; 37117680Spst 37298527Sfenner printf(" %s", tok2str(ns_type2str, "Type%d", typ)); 37375118Sfenner if (rp > snapend) 37475118Sfenner return(NULL); 37575118Sfenner 37617680Spst switch (typ) { 37717680Spst case T_A: 37898527Sfenner if (!TTEST2(*cp, sizeof(struct in_addr))) 37975118Sfenner return(NULL); 38017680Spst printf(" %s", ipaddr_string(cp)); 38117680Spst break; 38217680Spst 38317680Spst case T_NS: 38417680Spst case T_CNAME: 38517680Spst case T_PTR: 38656896Sfenner#ifdef T_DNAME 38775118Sfenner case T_DNAME: 38856896Sfenner#endif 38917680Spst putchar(' '); 39075118Sfenner if (ns_nprint(cp, bp) == NULL) 39175118Sfenner return(NULL); 39217680Spst break; 39317680Spst 39475118Sfenner case T_SOA: 39575118Sfenner if (!vflag) 39675118Sfenner break; 39775118Sfenner putchar(' '); 39875118Sfenner if ((cp = ns_nprint(cp, bp)) == NULL) 39975118Sfenner return(NULL); 40075118Sfenner putchar(' '); 40175118Sfenner if ((cp = ns_nprint(cp, bp)) == NULL) 40275118Sfenner return(NULL); 40398527Sfenner if (!TTEST2(*cp, 5 * 4)) 40475118Sfenner return(NULL); 40575118Sfenner printf(" %u", EXTRACT_32BITS(cp)); 40675118Sfenner cp += 4; 40775118Sfenner printf(" %u", EXTRACT_32BITS(cp)); 40875118Sfenner cp += 4; 40975118Sfenner printf(" %u", EXTRACT_32BITS(cp)); 41075118Sfenner cp += 4; 41175118Sfenner printf(" %u", EXTRACT_32BITS(cp)); 41275118Sfenner cp += 4; 41375118Sfenner printf(" %u", EXTRACT_32BITS(cp)); 41475118Sfenner cp += 4; 41575118Sfenner break; 41617680Spst case T_MX: 41717680Spst putchar(' '); 41898527Sfenner if (!TTEST2(*cp, 2)) 41975118Sfenner return(NULL); 42075118Sfenner if (ns_nprint(cp + 2, bp) == NULL) 42175118Sfenner return(NULL); 42217680Spst printf(" %d", EXTRACT_16BITS(cp)); 42317680Spst break; 42417680Spst 42517680Spst case T_TXT: 426127675Sbms while (cp < rp) { 427127675Sbms printf(" \""); 428127675Sbms cp = ns_cprint(cp); 429127675Sbms if (cp == NULL) 430127675Sbms return(NULL); 431127675Sbms putchar('"'); 432127675Sbms } 433127675Sbms break; 434127675Sbms 435127675Sbms case T_SRV: 43617680Spst putchar(' '); 437127675Sbms if (!TTEST2(*cp, 6)) 438127675Sbms return(NULL); 439127675Sbms if (ns_nprint(cp + 6, bp) == NULL) 440127675Sbms return(NULL); 441127675Sbms printf(":%d %d %d", EXTRACT_16BITS(cp + 4), 442127675Sbms EXTRACT_16BITS(cp), EXTRACT_16BITS(cp + 2)); 44317680Spst break; 44417680Spst 44556896Sfenner#ifdef INET6 44656896Sfenner case T_AAAA: 44798527Sfenner if (!TTEST2(*cp, sizeof(struct in6_addr))) 44875118Sfenner return(NULL); 44956896Sfenner printf(" %s", ip6addr_string(cp)); 45056896Sfenner break; 45156896Sfenner 45275118Sfenner case T_A6: 45356896Sfenner { 45456896Sfenner struct in6_addr a; 45575118Sfenner int pbit, pbyte; 45656896Sfenner 45798527Sfenner if (!TTEST2(*cp, 1)) 45898527Sfenner return(NULL); 45975118Sfenner pbit = *cp; 46075118Sfenner pbyte = (pbit & ~7) / 8; 46175118Sfenner if (pbit > 128) { 46275118Sfenner printf(" %u(bad plen)", pbit); 46375118Sfenner break; 46475118Sfenner } else if (pbit < 128) { 46598527Sfenner if (!TTEST2(*(cp + 1), sizeof(a) - pbyte)) 46698527Sfenner return(NULL); 46775118Sfenner memset(&a, 0, sizeof(a)); 46875118Sfenner memcpy(&a.s6_addr[pbyte], cp + 1, sizeof(a) - pbyte); 46975118Sfenner printf(" %u %s", pbit, ip6addr_string(&a)); 47075118Sfenner } 47175118Sfenner if (pbit > 0) { 47275118Sfenner putchar(' '); 47375118Sfenner if (ns_nprint(cp + 1 + sizeof(a) - pbyte, bp) == NULL) 47475118Sfenner return(NULL); 47575118Sfenner } 47656896Sfenner break; 47756896Sfenner } 47856896Sfenner#endif /*INET6*/ 47956896Sfenner 48075118Sfenner case T_OPT: 48175118Sfenner printf(" UDPsize=%u", class); 48275118Sfenner break; 48375118Sfenner 48417680Spst case T_UNSPECA: /* One long string */ 48598527Sfenner if (!TTEST2(*cp, len)) 48698527Sfenner return(NULL); 48798527Sfenner if (fn_printn(cp, len, snapend)) 48898527Sfenner return(NULL); 48998527Sfenner break; 49098527Sfenner 49198527Sfenner case T_TSIG: 49298527Sfenner { 49375118Sfenner if (cp + len > snapend) 49475118Sfenner return(NULL); 49598527Sfenner if (!vflag) 49698527Sfenner break; 49798527Sfenner putchar(' '); 49898527Sfenner if ((cp = ns_nprint(cp, bp)) == NULL) 49998527Sfenner return(NULL); 50098527Sfenner cp += 6; 50198527Sfenner if (!TTEST2(*cp, 2)) 50298527Sfenner return(NULL); 50398527Sfenner printf(" fudge=%u", EXTRACT_16BITS(cp)); 50498527Sfenner cp += 2; 50598527Sfenner if (!TTEST2(*cp, 2)) 50698527Sfenner return(NULL); 50798527Sfenner printf(" maclen=%u", EXTRACT_16BITS(cp)); 50898527Sfenner cp += 2 + EXTRACT_16BITS(cp); 50998527Sfenner if (!TTEST2(*cp, 2)) 51098527Sfenner return(NULL); 51198527Sfenner printf(" origid=%u", EXTRACT_16BITS(cp)); 51298527Sfenner cp += 2; 51398527Sfenner if (!TTEST2(*cp, 2)) 51498527Sfenner return(NULL); 51598527Sfenner printf(" error=%u", EXTRACT_16BITS(cp)); 51698527Sfenner cp += 2; 51798527Sfenner if (!TTEST2(*cp, 2)) 51898527Sfenner return(NULL); 51998527Sfenner printf(" otherlen=%u", EXTRACT_16BITS(cp)); 52098527Sfenner cp += 2; 52198527Sfenner } 52217680Spst } 52326183Sfenner return (rp); /* XXX This isn't always right */ 52417680Spst} 52517680Spst 52617680Spstvoid 527127675Sbmsns_print(register const u_char *bp, u_int length, int is_mdns) 52817680Spst{ 52917680Spst register const HEADER *np; 53017680Spst register int qdcount, ancount, nscount, arcount; 53198527Sfenner register const u_char *cp; 532127675Sbms u_int16_t b2; 53317680Spst 53417680Spst np = (const HEADER *)bp; 53580234Sfenner TCHECK(*np); 53617680Spst /* get the byte-order right */ 537127675Sbms qdcount = EXTRACT_16BITS(&np->qdcount); 538127675Sbms ancount = EXTRACT_16BITS(&np->ancount); 539127675Sbms nscount = EXTRACT_16BITS(&np->nscount); 540127675Sbms arcount = EXTRACT_16BITS(&np->arcount); 54117680Spst 54275118Sfenner if (DNS_QR(np)) { 54317680Spst /* this is a response */ 54475118Sfenner printf(" %d%s%s%s%s%s%s", 545127675Sbms EXTRACT_16BITS(&np->id), 54675118Sfenner ns_ops[DNS_OPCODE(np)], 54775118Sfenner ns_resp[DNS_RCODE(np)], 54875118Sfenner DNS_AA(np)? "*" : "", 54975118Sfenner DNS_RA(np)? "" : "-", 55075118Sfenner DNS_TC(np)? "|" : "", 551127675Sbms DNS_AD(np)? "$" : ""); 55275118Sfenner 55317680Spst if (qdcount != 1) 55417680Spst printf(" [%dq]", qdcount); 55517680Spst /* Print QUESTION section on -vv */ 55698527Sfenner cp = (const u_char *)(np + 1); 55798527Sfenner while (qdcount--) { 558127675Sbms if (qdcount < EXTRACT_16BITS(&np->qdcount) - 1) 55998527Sfenner putchar(','); 56098527Sfenner if (vflag > 1) { 56198527Sfenner fputs(" q:", stdout); 562127675Sbms if ((cp = ns_qprint(cp, bp, is_mdns)) == NULL) 56398527Sfenner goto trunc; 56498527Sfenner } else { 565127675Sbms if ((cp = ns_nskip(cp)) == NULL) 56698527Sfenner goto trunc; 56798527Sfenner cp += 4; /* skip QTYPE and QCLASS */ 56898527Sfenner } 56975118Sfenner } 57017680Spst printf(" %d/%d/%d", ancount, nscount, arcount); 57117680Spst if (ancount--) { 572127675Sbms if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 57375118Sfenner goto trunc; 57498527Sfenner while (cp < snapend && ancount--) { 57517680Spst putchar(','); 576127675Sbms if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 57775118Sfenner goto trunc; 57817680Spst } 57917680Spst } 58098527Sfenner if (ancount > 0) 58198527Sfenner goto trunc; 58275118Sfenner /* Print NS and AR sections on -vv */ 58375118Sfenner if (vflag > 1) { 58498527Sfenner if (cp < snapend && nscount--) { 58575118Sfenner fputs(" ns:", stdout); 586127675Sbms if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 58775118Sfenner goto trunc; 58898527Sfenner while (cp < snapend && nscount--) { 58975118Sfenner putchar(','); 590127675Sbms if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 59175118Sfenner goto trunc; 59275118Sfenner } 59375118Sfenner } 59498527Sfenner if (nscount > 0) 59598527Sfenner goto trunc; 59698527Sfenner if (cp < snapend && arcount--) { 59775118Sfenner fputs(" ar:", stdout); 598127675Sbms if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 59975118Sfenner goto trunc; 60098527Sfenner while (cp < snapend && arcount--) { 60175118Sfenner putchar(','); 602127675Sbms if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 60375118Sfenner goto trunc; 60475118Sfenner } 60575118Sfenner } 60698527Sfenner if (arcount > 0) 60798527Sfenner goto trunc; 60875118Sfenner } 60917680Spst } 61017680Spst else { 61117680Spst /* this is a request */ 612127675Sbms printf(" %d%s%s%s", EXTRACT_16BITS(&np->id), ns_ops[DNS_OPCODE(np)], 61375118Sfenner DNS_RD(np) ? "+" : "", 614127675Sbms DNS_CD(np) ? "%" : ""); 61517680Spst 61617680Spst /* any weirdness? */ 617127675Sbms b2 = EXTRACT_16BITS(((u_short *)np)+1); 618127675Sbms if (b2 & 0x6cf) 619127675Sbms printf(" [b2&3=0x%x]", b2); 62017680Spst 62175118Sfenner if (DNS_OPCODE(np) == IQUERY) { 62217680Spst if (qdcount) 62317680Spst printf(" [%dq]", qdcount); 62417680Spst if (ancount != 1) 62517680Spst printf(" [%da]", ancount); 62617680Spst } 62717680Spst else { 62817680Spst if (ancount) 62917680Spst printf(" [%da]", ancount); 63017680Spst if (qdcount != 1) 63117680Spst printf(" [%dq]", qdcount); 63217680Spst } 63317680Spst if (nscount) 63417680Spst printf(" [%dn]", nscount); 63517680Spst if (arcount) 63617680Spst printf(" [%dau]", arcount); 63717680Spst 63898527Sfenner cp = (const u_char *)(np + 1); 63975118Sfenner if (qdcount--) { 640127675Sbms cp = ns_qprint(cp, (const u_char *)np, is_mdns); 64175118Sfenner if (!cp) 64275118Sfenner goto trunc; 64398527Sfenner while (cp < snapend && qdcount--) { 64475118Sfenner cp = ns_qprint((const u_char *)cp, 645127675Sbms (const u_char *)np, 646127675Sbms is_mdns); 64775118Sfenner if (!cp) 64875118Sfenner goto trunc; 64975118Sfenner } 65075118Sfenner } 65198527Sfenner if (qdcount > 0) 65298527Sfenner goto trunc; 65375118Sfenner 65475118Sfenner /* Print remaining sections on -vv */ 65575118Sfenner if (vflag > 1) { 65675118Sfenner if (ancount--) { 657127675Sbms if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 65875118Sfenner goto trunc; 65998527Sfenner while (cp < snapend && ancount--) { 66075118Sfenner putchar(','); 661127675Sbms if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 66275118Sfenner goto trunc; 66375118Sfenner } 66475118Sfenner } 66598527Sfenner if (ancount > 0) 66698527Sfenner goto trunc; 66798527Sfenner if (cp < snapend && nscount--) { 66875118Sfenner fputs(" ns:", stdout); 669127675Sbms if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 67075118Sfenner goto trunc; 67175118Sfenner while (nscount-- && cp < snapend) { 67275118Sfenner putchar(','); 673127675Sbms if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 67475118Sfenner goto trunc; 67575118Sfenner } 67675118Sfenner } 67798527Sfenner if (nscount > 0) 67898527Sfenner goto trunc; 67998527Sfenner if (cp < snapend && arcount--) { 68075118Sfenner fputs(" ar:", stdout); 681127675Sbms if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 68275118Sfenner goto trunc; 68398527Sfenner while (cp < snapend && arcount--) { 68475118Sfenner putchar(','); 685127675Sbms if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 68675118Sfenner goto trunc; 68775118Sfenner } 68875118Sfenner } 68998527Sfenner if (arcount > 0) 69098527Sfenner goto trunc; 69175118Sfenner } 69217680Spst } 69317680Spst printf(" (%d)", length); 69475118Sfenner return; 69575118Sfenner 69675118Sfenner trunc: 69775118Sfenner printf("[|domain]"); 69875118Sfenner return; 69917680Spst} 700