print-domain.c revision 147904
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 147904 2005-07-11 04:14:02Z sam $ 2217680Spst */ 2317680Spst 2417680Spst#ifndef lint 25127675Sbmsstatic const char rcsid[] _U_ = 26147904Ssam "@(#) $Header: /tcpdump/master/tcpdump/print-domain.c,v 1.89.2.1 2005/04/20 20:59:00 guy 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; 136147904Ssam if ((elt = (i & ~INDIR_MASK)) != EDNS0_ELT_BITLABEL) { 137147904Ssam printf("<ELT %d>", elt); 13875118Sfenner return(-1); 139147904Ssam } 14098527Sfenner if (!TTEST2(*(cp + 1), 1)) 14175118Sfenner return(-1); 14275118Sfenner if ((bitlen = *(cp + 1)) == 0) 14375118Sfenner bitlen = 256; 14475118Sfenner return(((bitlen + 7) / 8) + 1); 14517680Spst } else 14675118Sfenner return(i); 14775118Sfenner} 14875118Sfenner 14975118Sfennerstatic const u_char * 15075118Sfennerns_nprint(register const u_char *cp, register const u_char *bp) 15175118Sfenner{ 15275118Sfenner register u_int i, l; 15375118Sfenner register const u_char *rp = NULL; 15475118Sfenner register int compress = 0; 15575118Sfenner int chars_processed; 15675118Sfenner int elt; 15775118Sfenner int data_size = snapend - bp; 15875118Sfenner 159127675Sbms if ((l = labellen(cp)) == (u_int)-1) 16075118Sfenner return(NULL); 16198527Sfenner if (!TTEST2(*cp, 1)) 16275118Sfenner return(NULL); 16375118Sfenner chars_processed = 1; 16475118Sfenner if (((i = *cp++) & INDIR_MASK) != INDIR_MASK) { 16517680Spst compress = 0; 16675118Sfenner rp = cp + l; 16775118Sfenner } 16875118Sfenner 16917680Spst if (i != 0) 17017680Spst while (i && cp < snapend) { 17117680Spst if ((i & INDIR_MASK) == INDIR_MASK) { 17275118Sfenner if (!compress) { 17375118Sfenner rp = cp + 1; 17475118Sfenner compress = 1; 17575118Sfenner } 17698527Sfenner if (!TTEST2(*cp, 1)) 17798527Sfenner return(NULL); 17817680Spst cp = bp + (((i << 8) | *cp) & 0x3fff); 179127675Sbms if ((l = labellen(cp)) == (u_int)-1) 18075118Sfenner return(NULL); 18198527Sfenner if (!TTEST2(*cp, 1)) 18298527Sfenner return(NULL); 18317680Spst i = *cp++; 18475118Sfenner chars_processed++; 18575118Sfenner 18675118Sfenner /* 18775118Sfenner * If we've looked at every character in 18875118Sfenner * the message, this pointer will make 18975118Sfenner * us look at some character again, 19075118Sfenner * which means we're looping. 19175118Sfenner */ 19275118Sfenner if (chars_processed >= data_size) { 19375118Sfenner printf("<LOOP>"); 19475118Sfenner return (NULL); 19575118Sfenner } 19617680Spst continue; 19717680Spst } 19875118Sfenner if ((i & INDIR_MASK) == EDNS0_MASK) { 19975118Sfenner elt = (i & ~INDIR_MASK); 20075118Sfenner switch(elt) { 20175118Sfenner case EDNS0_ELT_BITLABEL: 20298527Sfenner if (blabel_print(cp) == NULL) 20398527Sfenner return (NULL); 20475118Sfenner break; 20575118Sfenner default: 20675118Sfenner /* unknown ELT */ 20775118Sfenner printf("<ELT %d>", elt); 20875118Sfenner return(NULL); 20975118Sfenner } 21075118Sfenner } else { 21175118Sfenner if (fn_printn(cp, l, snapend)) 21298527Sfenner return(NULL); 21375118Sfenner } 21475118Sfenner 21575118Sfenner cp += l; 21675118Sfenner chars_processed += l; 21717680Spst putchar('.'); 218127675Sbms if ((l = labellen(cp)) == (u_int)-1) 21975118Sfenner return(NULL); 22098527Sfenner if (!TTEST2(*cp, 1)) 22198527Sfenner return(NULL); 22217680Spst i = *cp++; 22375118Sfenner chars_processed++; 22417680Spst if (!compress) 22575118Sfenner rp += l + 1; 22617680Spst } 22717680Spst else 22817680Spst putchar('.'); 22917680Spst return (rp); 23017680Spst} 23117680Spst 23217680Spst/* print a <character-string> */ 23317680Spststatic const u_char * 234127675Sbmsns_cprint(register const u_char *cp) 23517680Spst{ 23617680Spst register u_int i; 23717680Spst 23898527Sfenner if (!TTEST2(*cp, 1)) 23998527Sfenner return (NULL); 24017680Spst i = *cp++; 24198527Sfenner if (fn_printn(cp, i, snapend)) 24298527Sfenner return (NULL); 24317680Spst return (cp + i); 24417680Spst} 24517680Spst 246127675Sbms/* http://www.iana.org/assignments/dns-parameters */ 24798527Sfennerstruct tok ns_type2str[] = { 248127675Sbms { T_A, "A" }, /* RFC 1035 */ 249127675Sbms { T_NS, "NS" }, /* RFC 1035 */ 250127675Sbms { T_MD, "MD" }, /* RFC 1035 */ 251127675Sbms { T_MF, "MF" }, /* RFC 1035 */ 252127675Sbms { T_CNAME, "CNAME" }, /* RFC 1035 */ 253127675Sbms { T_SOA, "SOA" }, /* RFC 1035 */ 254127675Sbms { T_MB, "MB" }, /* RFC 1035 */ 255127675Sbms { T_MG, "MG" }, /* RFC 1035 */ 256127675Sbms { T_MR, "MR" }, /* RFC 1035 */ 257127675Sbms { T_NULL, "NULL" }, /* RFC 1035 */ 258127675Sbms { T_WKS, "WKS" }, /* RFC 1035 */ 259127675Sbms { T_PTR, "PTR" }, /* RFC 1035 */ 260127675Sbms { T_HINFO, "HINFO" }, /* RFC 1035 */ 261127675Sbms { T_MINFO, "MINFO" }, /* RFC 1035 */ 262127675Sbms { T_MX, "MX" }, /* RFC 1035 */ 263127675Sbms { T_TXT, "TXT" }, /* RFC 1035 */ 264127675Sbms { T_RP, "RP" }, /* RFC 1183 */ 265127675Sbms { T_AFSDB, "AFSDB" }, /* RFC 1183 */ 266127675Sbms { T_X25, "X25" }, /* RFC 1183 */ 267127675Sbms { T_ISDN, "ISDN" }, /* RFC 1183 */ 268127675Sbms { T_RT, "RT" }, /* RFC 1183 */ 269127675Sbms { T_NSAP, "NSAP" }, /* RFC 1706 */ 27017680Spst { T_NSAP_PTR, "NSAP_PTR" }, 271127675Sbms { T_SIG, "SIG" }, /* RFC 2535 */ 272127675Sbms { T_KEY, "KEY" }, /* RFC 2535 */ 273127675Sbms { T_PX, "PX" }, /* RFC 2163 */ 274127675Sbms { T_GPOS, "GPOS" }, /* RFC 1712 */ 275127675Sbms { T_AAAA, "AAAA" }, /* RFC 1886 */ 276127675Sbms { T_LOC, "LOC" }, /* RFC 1876 */ 277127675Sbms { T_NXT, "NXT" }, /* RFC 2535 */ 278127675Sbms { T_EID, "EID" }, /* Nimrod */ 279127675Sbms { T_NIMLOC, "NIMLOC" }, /* Nimrod */ 280127675Sbms { T_SRV, "SRV" }, /* RFC 2782 */ 281127675Sbms { T_ATMA, "ATMA" }, /* ATM Forum */ 282127675Sbms { T_NAPTR, "NAPTR" }, /* RFC 2168, RFC 2915 */ 283127675Sbms { T_A6, "A6" }, /* RFC 2874 */ 284127675Sbms { T_DNAME, "DNAME" }, /* RFC 2672 */ 285127675Sbms { T_OPT, "OPT" }, /* RFC 2671 */ 28639300Sfenner { T_UINFO, "UINFO" }, 28739300Sfenner { T_UID, "UID" }, 28839300Sfenner { T_GID, "GID" }, 28917680Spst { T_UNSPEC, "UNSPEC" }, 29017680Spst { T_UNSPECA, "UNSPECA" }, 291127675Sbms { T_TKEY, "TKEY" }, /* RFC 2930 */ 292127675Sbms { T_TSIG, "TSIG" }, /* RFC 2845 */ 293127675Sbms { T_IXFR, "IXFR" }, /* RFC 1995 */ 294127675Sbms { T_AXFR, "AXFR" }, /* RFC 1035 */ 295127675Sbms { T_MAILB, "MAILB" }, /* RFC 1035 */ 296127675Sbms { T_MAILA, "MAILA" }, /* RFC 1035 */ 29717680Spst { T_ANY, "ANY" }, 29817680Spst { 0, NULL } 29917680Spst}; 30017680Spst 30198527Sfennerstruct tok ns_class2str[] = { 30217680Spst { C_IN, "IN" }, /* Not used */ 30398527Sfenner { C_CHAOS, "CHAOS" }, 30417680Spst { C_HS, "HS" }, 30517680Spst { C_ANY, "ANY" }, 30617680Spst { 0, NULL } 30717680Spst}; 30817680Spst 30917680Spst/* print a query */ 31075118Sfennerstatic const u_char * 311127675Sbmsns_qprint(register const u_char *cp, register const u_char *bp, int is_mdns) 31217680Spst{ 31317680Spst register const u_char *np = cp; 31417680Spst register u_int i; 31517680Spst 316127675Sbms cp = ns_nskip(cp); 31717680Spst 31898527Sfenner if (cp == NULL || !TTEST2(*cp, 4)) 31975118Sfenner return(NULL); 32017680Spst 32117680Spst /* print the qtype and qclass (if it's not IN) */ 322127675Sbms i = EXTRACT_16BITS(cp); 323127675Sbms cp += 2; 32498527Sfenner printf(" %s", tok2str(ns_type2str, "Type%d", i)); 325127675Sbms i = EXTRACT_16BITS(cp); 326127675Sbms cp += 2; 327127675Sbms if (is_mdns && i == (C_IN|C_CACHE_FLUSH)) 328127675Sbms printf(" (Cache flush)"); 329127675Sbms else if (i != C_IN) 33098527Sfenner printf(" %s", tok2str(ns_class2str, "(Class %d)", i)); 33117680Spst 33217680Spst fputs("? ", stdout); 33375118Sfenner cp = ns_nprint(np, bp); 33475118Sfenner return(cp ? cp + 4 : NULL); 33517680Spst} 33617680Spst 33717680Spst/* print a reply */ 33817680Spststatic const u_char * 339127675Sbmsns_rprint(register const u_char *cp, register const u_char *bp, int is_mdns) 34017680Spst{ 34175118Sfenner register u_int class; 34217680Spst register u_short typ, len; 34317680Spst register const u_char *rp; 34417680Spst 34517680Spst if (vflag) { 34617680Spst putchar(' '); 34775118Sfenner if ((cp = ns_nprint(cp, bp)) == NULL) 34875118Sfenner return NULL; 34917680Spst } else 350127675Sbms cp = ns_nskip(cp); 35117680Spst 35298527Sfenner if (cp == NULL || !TTEST2(*cp, 10)) 35317680Spst return (snapend); 35417680Spst 35517680Spst /* print the type/qtype and class (if it's not IN) */ 356127675Sbms typ = EXTRACT_16BITS(cp); 357127675Sbms cp += 2; 358127675Sbms class = EXTRACT_16BITS(cp); 359127675Sbms cp += 2; 360127675Sbms if (is_mdns && class == (C_IN|C_CACHE_FLUSH)) 361127675Sbms printf(" (Cache flush)"); 362127675Sbms else if (class != C_IN && typ != T_OPT) 36398527Sfenner printf(" %s", tok2str(ns_class2str, "(Class %d)", class)); 36417680Spst 36517680Spst /* ignore ttl */ 36617680Spst cp += 4; 36717680Spst 368127675Sbms len = EXTRACT_16BITS(cp); 369127675Sbms cp += 2; 37017680Spst 37117680Spst rp = cp + len; 37217680Spst 37398527Sfenner printf(" %s", tok2str(ns_type2str, "Type%d", typ)); 37475118Sfenner if (rp > snapend) 37575118Sfenner return(NULL); 37675118Sfenner 37717680Spst switch (typ) { 37817680Spst case T_A: 37998527Sfenner if (!TTEST2(*cp, sizeof(struct in_addr))) 38075118Sfenner return(NULL); 38117680Spst printf(" %s", ipaddr_string(cp)); 38217680Spst break; 38317680Spst 38417680Spst case T_NS: 38517680Spst case T_CNAME: 38617680Spst case T_PTR: 38756896Sfenner#ifdef T_DNAME 38875118Sfenner case T_DNAME: 38956896Sfenner#endif 39017680Spst putchar(' '); 39175118Sfenner if (ns_nprint(cp, bp) == NULL) 39275118Sfenner return(NULL); 39317680Spst break; 39417680Spst 39575118Sfenner case T_SOA: 39675118Sfenner if (!vflag) 39775118Sfenner break; 39875118Sfenner putchar(' '); 39975118Sfenner if ((cp = ns_nprint(cp, bp)) == NULL) 40075118Sfenner return(NULL); 40175118Sfenner putchar(' '); 40275118Sfenner if ((cp = ns_nprint(cp, bp)) == NULL) 40375118Sfenner return(NULL); 40498527Sfenner if (!TTEST2(*cp, 5 * 4)) 40575118Sfenner return(NULL); 40675118Sfenner printf(" %u", EXTRACT_32BITS(cp)); 40775118Sfenner cp += 4; 40875118Sfenner printf(" %u", EXTRACT_32BITS(cp)); 40975118Sfenner cp += 4; 41075118Sfenner printf(" %u", EXTRACT_32BITS(cp)); 41175118Sfenner cp += 4; 41275118Sfenner printf(" %u", EXTRACT_32BITS(cp)); 41375118Sfenner cp += 4; 41475118Sfenner printf(" %u", EXTRACT_32BITS(cp)); 41575118Sfenner cp += 4; 41675118Sfenner break; 41717680Spst case T_MX: 41817680Spst putchar(' '); 41998527Sfenner if (!TTEST2(*cp, 2)) 42075118Sfenner return(NULL); 42175118Sfenner if (ns_nprint(cp + 2, bp) == NULL) 42275118Sfenner return(NULL); 42317680Spst printf(" %d", EXTRACT_16BITS(cp)); 42417680Spst break; 42517680Spst 42617680Spst case T_TXT: 427127675Sbms while (cp < rp) { 428127675Sbms printf(" \""); 429127675Sbms cp = ns_cprint(cp); 430127675Sbms if (cp == NULL) 431127675Sbms return(NULL); 432127675Sbms putchar('"'); 433127675Sbms } 434127675Sbms break; 435127675Sbms 436127675Sbms case T_SRV: 43717680Spst putchar(' '); 438127675Sbms if (!TTEST2(*cp, 6)) 439127675Sbms return(NULL); 440127675Sbms if (ns_nprint(cp + 6, bp) == NULL) 441127675Sbms return(NULL); 442127675Sbms printf(":%d %d %d", EXTRACT_16BITS(cp + 4), 443127675Sbms EXTRACT_16BITS(cp), EXTRACT_16BITS(cp + 2)); 44417680Spst break; 44517680Spst 44656896Sfenner#ifdef INET6 44756896Sfenner case T_AAAA: 44898527Sfenner if (!TTEST2(*cp, sizeof(struct in6_addr))) 44975118Sfenner return(NULL); 45056896Sfenner printf(" %s", ip6addr_string(cp)); 45156896Sfenner break; 45256896Sfenner 45375118Sfenner case T_A6: 45456896Sfenner { 45556896Sfenner struct in6_addr a; 45675118Sfenner int pbit, pbyte; 45756896Sfenner 45898527Sfenner if (!TTEST2(*cp, 1)) 45998527Sfenner return(NULL); 46075118Sfenner pbit = *cp; 46175118Sfenner pbyte = (pbit & ~7) / 8; 46275118Sfenner if (pbit > 128) { 46375118Sfenner printf(" %u(bad plen)", pbit); 46475118Sfenner break; 46575118Sfenner } else if (pbit < 128) { 46698527Sfenner if (!TTEST2(*(cp + 1), sizeof(a) - pbyte)) 46798527Sfenner return(NULL); 46875118Sfenner memset(&a, 0, sizeof(a)); 46975118Sfenner memcpy(&a.s6_addr[pbyte], cp + 1, sizeof(a) - pbyte); 47075118Sfenner printf(" %u %s", pbit, ip6addr_string(&a)); 47175118Sfenner } 47275118Sfenner if (pbit > 0) { 47375118Sfenner putchar(' '); 47475118Sfenner if (ns_nprint(cp + 1 + sizeof(a) - pbyte, bp) == NULL) 47575118Sfenner return(NULL); 47675118Sfenner } 47756896Sfenner break; 47856896Sfenner } 47956896Sfenner#endif /*INET6*/ 48056896Sfenner 48175118Sfenner case T_OPT: 48275118Sfenner printf(" UDPsize=%u", class); 48375118Sfenner break; 48475118Sfenner 48517680Spst case T_UNSPECA: /* One long string */ 48698527Sfenner if (!TTEST2(*cp, len)) 48798527Sfenner return(NULL); 48898527Sfenner if (fn_printn(cp, len, snapend)) 48998527Sfenner return(NULL); 49098527Sfenner break; 49198527Sfenner 49298527Sfenner case T_TSIG: 49398527Sfenner { 49475118Sfenner if (cp + len > snapend) 49575118Sfenner return(NULL); 49698527Sfenner if (!vflag) 49798527Sfenner break; 49898527Sfenner putchar(' '); 49998527Sfenner if ((cp = ns_nprint(cp, bp)) == NULL) 50098527Sfenner return(NULL); 50198527Sfenner cp += 6; 50298527Sfenner if (!TTEST2(*cp, 2)) 50398527Sfenner return(NULL); 50498527Sfenner printf(" fudge=%u", EXTRACT_16BITS(cp)); 50598527Sfenner cp += 2; 50698527Sfenner if (!TTEST2(*cp, 2)) 50798527Sfenner return(NULL); 50898527Sfenner printf(" maclen=%u", EXTRACT_16BITS(cp)); 50998527Sfenner cp += 2 + EXTRACT_16BITS(cp); 51098527Sfenner if (!TTEST2(*cp, 2)) 51198527Sfenner return(NULL); 51298527Sfenner printf(" origid=%u", EXTRACT_16BITS(cp)); 51398527Sfenner cp += 2; 51498527Sfenner if (!TTEST2(*cp, 2)) 51598527Sfenner return(NULL); 51698527Sfenner printf(" error=%u", EXTRACT_16BITS(cp)); 51798527Sfenner cp += 2; 51898527Sfenner if (!TTEST2(*cp, 2)) 51998527Sfenner return(NULL); 52098527Sfenner printf(" otherlen=%u", EXTRACT_16BITS(cp)); 52198527Sfenner cp += 2; 52298527Sfenner } 52317680Spst } 52426183Sfenner return (rp); /* XXX This isn't always right */ 52517680Spst} 52617680Spst 52717680Spstvoid 528127675Sbmsns_print(register const u_char *bp, u_int length, int is_mdns) 52917680Spst{ 53017680Spst register const HEADER *np; 53117680Spst register int qdcount, ancount, nscount, arcount; 53298527Sfenner register const u_char *cp; 533127675Sbms u_int16_t b2; 53417680Spst 53517680Spst np = (const HEADER *)bp; 53680234Sfenner TCHECK(*np); 53717680Spst /* get the byte-order right */ 538127675Sbms qdcount = EXTRACT_16BITS(&np->qdcount); 539127675Sbms ancount = EXTRACT_16BITS(&np->ancount); 540127675Sbms nscount = EXTRACT_16BITS(&np->nscount); 541127675Sbms arcount = EXTRACT_16BITS(&np->arcount); 54217680Spst 54375118Sfenner if (DNS_QR(np)) { 54417680Spst /* this is a response */ 54575118Sfenner printf(" %d%s%s%s%s%s%s", 546127675Sbms EXTRACT_16BITS(&np->id), 54775118Sfenner ns_ops[DNS_OPCODE(np)], 54875118Sfenner ns_resp[DNS_RCODE(np)], 54975118Sfenner DNS_AA(np)? "*" : "", 55075118Sfenner DNS_RA(np)? "" : "-", 55175118Sfenner DNS_TC(np)? "|" : "", 552127675Sbms DNS_AD(np)? "$" : ""); 55375118Sfenner 55417680Spst if (qdcount != 1) 55517680Spst printf(" [%dq]", qdcount); 55617680Spst /* Print QUESTION section on -vv */ 55798527Sfenner cp = (const u_char *)(np + 1); 55898527Sfenner while (qdcount--) { 559127675Sbms if (qdcount < EXTRACT_16BITS(&np->qdcount) - 1) 56098527Sfenner putchar(','); 56198527Sfenner if (vflag > 1) { 56298527Sfenner fputs(" q:", stdout); 563127675Sbms if ((cp = ns_qprint(cp, bp, is_mdns)) == NULL) 56498527Sfenner goto trunc; 56598527Sfenner } else { 566127675Sbms if ((cp = ns_nskip(cp)) == NULL) 56798527Sfenner goto trunc; 56898527Sfenner cp += 4; /* skip QTYPE and QCLASS */ 56998527Sfenner } 57075118Sfenner } 57117680Spst printf(" %d/%d/%d", ancount, nscount, arcount); 57217680Spst if (ancount--) { 573127675Sbms if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 57475118Sfenner goto trunc; 57598527Sfenner while (cp < snapend && ancount--) { 57617680Spst putchar(','); 577127675Sbms if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 57875118Sfenner goto trunc; 57917680Spst } 58017680Spst } 58198527Sfenner if (ancount > 0) 58298527Sfenner goto trunc; 58375118Sfenner /* Print NS and AR sections on -vv */ 58475118Sfenner if (vflag > 1) { 58598527Sfenner if (cp < snapend && nscount--) { 58675118Sfenner fputs(" ns:", stdout); 587127675Sbms if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 58875118Sfenner goto trunc; 58998527Sfenner while (cp < snapend && nscount--) { 59075118Sfenner putchar(','); 591127675Sbms if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 59275118Sfenner goto trunc; 59375118Sfenner } 59475118Sfenner } 59598527Sfenner if (nscount > 0) 59698527Sfenner goto trunc; 59798527Sfenner if (cp < snapend && arcount--) { 59875118Sfenner fputs(" ar:", stdout); 599127675Sbms if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 60075118Sfenner goto trunc; 60198527Sfenner while (cp < snapend && arcount--) { 60275118Sfenner putchar(','); 603127675Sbms if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 60475118Sfenner goto trunc; 60575118Sfenner } 60675118Sfenner } 60798527Sfenner if (arcount > 0) 60898527Sfenner goto trunc; 60975118Sfenner } 61017680Spst } 61117680Spst else { 61217680Spst /* this is a request */ 613127675Sbms printf(" %d%s%s%s", EXTRACT_16BITS(&np->id), ns_ops[DNS_OPCODE(np)], 61475118Sfenner DNS_RD(np) ? "+" : "", 615127675Sbms DNS_CD(np) ? "%" : ""); 61617680Spst 61717680Spst /* any weirdness? */ 618127675Sbms b2 = EXTRACT_16BITS(((u_short *)np)+1); 619127675Sbms if (b2 & 0x6cf) 620127675Sbms printf(" [b2&3=0x%x]", b2); 62117680Spst 62275118Sfenner if (DNS_OPCODE(np) == IQUERY) { 62317680Spst if (qdcount) 62417680Spst printf(" [%dq]", qdcount); 62517680Spst if (ancount != 1) 62617680Spst printf(" [%da]", ancount); 62717680Spst } 62817680Spst else { 62917680Spst if (ancount) 63017680Spst printf(" [%da]", ancount); 63117680Spst if (qdcount != 1) 63217680Spst printf(" [%dq]", qdcount); 63317680Spst } 63417680Spst if (nscount) 63517680Spst printf(" [%dn]", nscount); 63617680Spst if (arcount) 63717680Spst printf(" [%dau]", arcount); 63817680Spst 63998527Sfenner cp = (const u_char *)(np + 1); 64075118Sfenner if (qdcount--) { 641127675Sbms cp = ns_qprint(cp, (const u_char *)np, is_mdns); 64275118Sfenner if (!cp) 64375118Sfenner goto trunc; 64498527Sfenner while (cp < snapend && qdcount--) { 64575118Sfenner cp = ns_qprint((const u_char *)cp, 646127675Sbms (const u_char *)np, 647127675Sbms is_mdns); 64875118Sfenner if (!cp) 64975118Sfenner goto trunc; 65075118Sfenner } 65175118Sfenner } 65298527Sfenner if (qdcount > 0) 65398527Sfenner goto trunc; 65475118Sfenner 65575118Sfenner /* Print remaining sections on -vv */ 65675118Sfenner if (vflag > 1) { 65775118Sfenner if (ancount--) { 658127675Sbms if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 65975118Sfenner goto trunc; 66098527Sfenner while (cp < snapend && ancount--) { 66175118Sfenner putchar(','); 662127675Sbms if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 66375118Sfenner goto trunc; 66475118Sfenner } 66575118Sfenner } 66698527Sfenner if (ancount > 0) 66798527Sfenner goto trunc; 66898527Sfenner if (cp < snapend && nscount--) { 66975118Sfenner fputs(" ns:", stdout); 670127675Sbms if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 67175118Sfenner goto trunc; 67275118Sfenner while (nscount-- && cp < snapend) { 67375118Sfenner putchar(','); 674127675Sbms if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 67575118Sfenner goto trunc; 67675118Sfenner } 67775118Sfenner } 67898527Sfenner if (nscount > 0) 67998527Sfenner goto trunc; 68098527Sfenner if (cp < snapend && arcount--) { 68175118Sfenner fputs(" ar:", stdout); 682127675Sbms if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 68375118Sfenner goto trunc; 68498527Sfenner while (cp < snapend && arcount--) { 68575118Sfenner putchar(','); 686127675Sbms if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 68775118Sfenner goto trunc; 68875118Sfenner } 68975118Sfenner } 69098527Sfenner if (arcount > 0) 69198527Sfenner goto trunc; 69275118Sfenner } 69317680Spst } 69417680Spst printf(" (%d)", length); 69575118Sfenner return; 69675118Sfenner 69775118Sfenner trunc: 69875118Sfenner printf("[|domain]"); 69975118Sfenner return; 70017680Spst} 701