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 * $FreeBSD$ 2217680Spst */ 2317680Spst 2417680Spst#ifndef lint 25127675Sbmsstatic const char rcsid[] _U_ = 26214478Srpaulo "@(#) $Header: /tcpdump/master/tcpdump/print-domain.c,v 1.98 2007-12-09 01:40:32 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 149251158Sdelphijconst 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 */ 283172686Smlaier { T_KX, "KX" }, /* RFC 2230 */ 284172686Smlaier { T_CERT, "CERT" }, /* RFC 2538 */ 285127675Sbms { T_A6, "A6" }, /* RFC 2874 */ 286127675Sbms { T_DNAME, "DNAME" }, /* RFC 2672 */ 287172686Smlaier { T_SINK, "SINK" }, 288127675Sbms { T_OPT, "OPT" }, /* RFC 2671 */ 289172686Smlaier { T_APL, "APL" }, /* RFC 3123 */ 290172686Smlaier { T_DS, "DS" }, /* RFC 4034 */ 291172686Smlaier { T_SSHFP, "SSHFP" }, /* RFC 4255 */ 292172686Smlaier { T_IPSECKEY, "IPSECKEY" }, /* RFC 4025 */ 293172686Smlaier { T_RRSIG, "RRSIG" }, /* RFC 4034 */ 294172686Smlaier { T_NSEC, "NSEC" }, /* RFC 4034 */ 295172686Smlaier { T_DNSKEY, "DNSKEY" }, /* RFC 4034 */ 296172686Smlaier { T_SPF, "SPF" }, /* RFC-schlitt-spf-classic-02.txt */ 29739300Sfenner { T_UINFO, "UINFO" }, 29839300Sfenner { T_UID, "UID" }, 29939300Sfenner { T_GID, "GID" }, 30017680Spst { T_UNSPEC, "UNSPEC" }, 30117680Spst { T_UNSPECA, "UNSPECA" }, 302127675Sbms { T_TKEY, "TKEY" }, /* RFC 2930 */ 303127675Sbms { T_TSIG, "TSIG" }, /* RFC 2845 */ 304127675Sbms { T_IXFR, "IXFR" }, /* RFC 1995 */ 305127675Sbms { T_AXFR, "AXFR" }, /* RFC 1035 */ 306127675Sbms { T_MAILB, "MAILB" }, /* RFC 1035 */ 307127675Sbms { T_MAILA, "MAILA" }, /* RFC 1035 */ 30817680Spst { T_ANY, "ANY" }, 30917680Spst { 0, NULL } 31017680Spst}; 31117680Spst 31298527Sfennerstruct tok ns_class2str[] = { 31317680Spst { C_IN, "IN" }, /* Not used */ 31498527Sfenner { C_CHAOS, "CHAOS" }, 31517680Spst { C_HS, "HS" }, 31617680Spst { C_ANY, "ANY" }, 31717680Spst { 0, NULL } 31817680Spst}; 31917680Spst 32017680Spst/* print a query */ 32175118Sfennerstatic const u_char * 322127675Sbmsns_qprint(register const u_char *cp, register const u_char *bp, int is_mdns) 32317680Spst{ 32417680Spst register const u_char *np = cp; 325172686Smlaier register u_int i, class; 32617680Spst 327127675Sbms cp = ns_nskip(cp); 32817680Spst 32998527Sfenner if (cp == NULL || !TTEST2(*cp, 4)) 33075118Sfenner return(NULL); 33117680Spst 332172686Smlaier /* print the qtype */ 333127675Sbms i = EXTRACT_16BITS(cp); 334127675Sbms cp += 2; 33598527Sfenner printf(" %s", tok2str(ns_type2str, "Type%d", i)); 336172686Smlaier /* print the qclass (if it's not IN) */ 337127675Sbms i = EXTRACT_16BITS(cp); 338127675Sbms cp += 2; 339172686Smlaier if (is_mdns) 340172686Smlaier class = (i & ~C_QU); 341172686Smlaier else 342172686Smlaier class = i; 343172686Smlaier if (class != C_IN) 344172686Smlaier printf(" %s", tok2str(ns_class2str, "(Class %d)", class)); 345172686Smlaier if (is_mdns) { 346172686Smlaier if (i & C_QU) 347172686Smlaier printf(" (QU)"); 348172686Smlaier else 349172686Smlaier printf(" (QM)"); 350172686Smlaier } 35117680Spst 35217680Spst fputs("? ", stdout); 35375118Sfenner cp = ns_nprint(np, bp); 35475118Sfenner return(cp ? cp + 4 : NULL); 35517680Spst} 35617680Spst 35717680Spst/* print a reply */ 35817680Spststatic const u_char * 359127675Sbmsns_rprint(register const u_char *cp, register const u_char *bp, int is_mdns) 36017680Spst{ 361172686Smlaier register u_int i, class, opt_flags = 0; 36217680Spst register u_short typ, len; 36317680Spst register const u_char *rp; 36417680Spst 36517680Spst if (vflag) { 36617680Spst putchar(' '); 36775118Sfenner if ((cp = ns_nprint(cp, bp)) == NULL) 36875118Sfenner return NULL; 36917680Spst } else 370127675Sbms cp = ns_nskip(cp); 37117680Spst 37298527Sfenner if (cp == NULL || !TTEST2(*cp, 10)) 37317680Spst return (snapend); 37417680Spst 375172686Smlaier /* print the type/qtype */ 376127675Sbms typ = EXTRACT_16BITS(cp); 377127675Sbms cp += 2; 378172686Smlaier /* print the class (if it's not IN and the type isn't OPT) */ 379172686Smlaier i = EXTRACT_16BITS(cp); 380127675Sbms cp += 2; 381172686Smlaier if (is_mdns) 382172686Smlaier class = (i & ~C_CACHE_FLUSH); 383172686Smlaier else 384172686Smlaier class = i; 385172686Smlaier if (class != C_IN && typ != T_OPT) 38698527Sfenner printf(" %s", tok2str(ns_class2str, "(Class %d)", class)); 387172686Smlaier if (is_mdns) { 388172686Smlaier if (i & C_CACHE_FLUSH) 389172686Smlaier printf(" (Cache flush)"); 390172686Smlaier } 39117680Spst 392190207Srpaulo if (typ == T_OPT) { 393190207Srpaulo /* get opt flags */ 394190207Srpaulo cp += 2; 395172686Smlaier opt_flags = EXTRACT_16BITS(cp); 396190207Srpaulo /* ignore rest of ttl field */ 397190207Srpaulo cp += 2; 398190207Srpaulo } else if (vflag > 2) { 399190207Srpaulo /* print ttl */ 400190207Srpaulo printf(" ["); 401190207Srpaulo relts_print(EXTRACT_32BITS(cp)); 402190207Srpaulo printf("]"); 403190207Srpaulo cp += 4; 404190207Srpaulo } else { 405190207Srpaulo /* ignore ttl */ 406190207Srpaulo cp += 4; 407190207Srpaulo } 40817680Spst 409127675Sbms len = EXTRACT_16BITS(cp); 410127675Sbms cp += 2; 41117680Spst 41217680Spst rp = cp + len; 41317680Spst 41498527Sfenner printf(" %s", tok2str(ns_type2str, "Type%d", typ)); 41575118Sfenner if (rp > snapend) 41675118Sfenner return(NULL); 41775118Sfenner 41817680Spst switch (typ) { 41917680Spst case T_A: 42098527Sfenner if (!TTEST2(*cp, sizeof(struct in_addr))) 42175118Sfenner return(NULL); 422190207Srpaulo printf(" %s", intoa(htonl(EXTRACT_32BITS(cp)))); 42317680Spst break; 42417680Spst 42517680Spst case T_NS: 42617680Spst case T_CNAME: 42717680Spst case T_PTR: 42856896Sfenner#ifdef T_DNAME 42975118Sfenner case T_DNAME: 43056896Sfenner#endif 43117680Spst putchar(' '); 43275118Sfenner if (ns_nprint(cp, bp) == NULL) 43375118Sfenner return(NULL); 43417680Spst break; 43517680Spst 43675118Sfenner case T_SOA: 43775118Sfenner if (!vflag) 43875118Sfenner break; 43975118Sfenner putchar(' '); 44075118Sfenner if ((cp = ns_nprint(cp, bp)) == NULL) 44175118Sfenner return(NULL); 44275118Sfenner putchar(' '); 44375118Sfenner if ((cp = ns_nprint(cp, bp)) == NULL) 44475118Sfenner return(NULL); 44598527Sfenner if (!TTEST2(*cp, 5 * 4)) 44675118Sfenner return(NULL); 44775118Sfenner printf(" %u", EXTRACT_32BITS(cp)); 44875118Sfenner cp += 4; 44975118Sfenner printf(" %u", EXTRACT_32BITS(cp)); 45075118Sfenner cp += 4; 45175118Sfenner printf(" %u", EXTRACT_32BITS(cp)); 45275118Sfenner cp += 4; 45375118Sfenner printf(" %u", EXTRACT_32BITS(cp)); 45475118Sfenner cp += 4; 45575118Sfenner printf(" %u", EXTRACT_32BITS(cp)); 45675118Sfenner cp += 4; 45775118Sfenner break; 45817680Spst case T_MX: 45917680Spst putchar(' '); 46098527Sfenner if (!TTEST2(*cp, 2)) 46175118Sfenner return(NULL); 46275118Sfenner if (ns_nprint(cp + 2, bp) == NULL) 46375118Sfenner return(NULL); 46417680Spst printf(" %d", EXTRACT_16BITS(cp)); 46517680Spst break; 46617680Spst 46717680Spst case T_TXT: 468127675Sbms while (cp < rp) { 469127675Sbms printf(" \""); 470127675Sbms cp = ns_cprint(cp); 471127675Sbms if (cp == NULL) 472127675Sbms return(NULL); 473127675Sbms putchar('"'); 474127675Sbms } 475127675Sbms break; 476127675Sbms 477127675Sbms case T_SRV: 47817680Spst putchar(' '); 479127675Sbms if (!TTEST2(*cp, 6)) 480127675Sbms return(NULL); 481127675Sbms if (ns_nprint(cp + 6, bp) == NULL) 482127675Sbms return(NULL); 483127675Sbms printf(":%d %d %d", EXTRACT_16BITS(cp + 4), 484127675Sbms EXTRACT_16BITS(cp), EXTRACT_16BITS(cp + 2)); 48517680Spst break; 48617680Spst 48756896Sfenner#ifdef INET6 48856896Sfenner case T_AAAA: 489190207Srpaulo { 490190207Srpaulo struct in6_addr addr; 491190207Srpaulo char ntop_buf[INET6_ADDRSTRLEN]; 492190207Srpaulo 49398527Sfenner if (!TTEST2(*cp, sizeof(struct in6_addr))) 49475118Sfenner return(NULL); 495190207Srpaulo memcpy(&addr, cp, sizeof(struct in6_addr)); 496190207Srpaulo printf(" %s", 497190207Srpaulo inet_ntop(AF_INET6, &addr, ntop_buf, sizeof(ntop_buf))); 498190207Srpaulo 49956896Sfenner break; 500190207Srpaulo } 50156896Sfenner 50275118Sfenner case T_A6: 50356896Sfenner { 50456896Sfenner struct in6_addr a; 50575118Sfenner int pbit, pbyte; 506190207Srpaulo char ntop_buf[INET6_ADDRSTRLEN]; 50756896Sfenner 50898527Sfenner if (!TTEST2(*cp, 1)) 50998527Sfenner return(NULL); 51075118Sfenner pbit = *cp; 51175118Sfenner pbyte = (pbit & ~7) / 8; 51275118Sfenner if (pbit > 128) { 51375118Sfenner printf(" %u(bad plen)", pbit); 51475118Sfenner break; 51575118Sfenner } else if (pbit < 128) { 51698527Sfenner if (!TTEST2(*(cp + 1), sizeof(a) - pbyte)) 51798527Sfenner return(NULL); 51875118Sfenner memset(&a, 0, sizeof(a)); 51975118Sfenner memcpy(&a.s6_addr[pbyte], cp + 1, sizeof(a) - pbyte); 520190207Srpaulo printf(" %u %s", pbit, 521190207Srpaulo inet_ntop(AF_INET6, &a, ntop_buf, sizeof(ntop_buf))); 52275118Sfenner } 52375118Sfenner if (pbit > 0) { 52475118Sfenner putchar(' '); 52575118Sfenner if (ns_nprint(cp + 1 + sizeof(a) - pbyte, bp) == NULL) 52675118Sfenner return(NULL); 52775118Sfenner } 52856896Sfenner break; 52956896Sfenner } 53056896Sfenner#endif /*INET6*/ 53156896Sfenner 53275118Sfenner case T_OPT: 53375118Sfenner printf(" UDPsize=%u", class); 534172686Smlaier if (opt_flags & 0x8000) 535172686Smlaier printf(" OK"); 53675118Sfenner break; 53775118Sfenner 53817680Spst case T_UNSPECA: /* One long string */ 53998527Sfenner if (!TTEST2(*cp, len)) 54098527Sfenner return(NULL); 54198527Sfenner if (fn_printn(cp, len, snapend)) 54298527Sfenner return(NULL); 54398527Sfenner break; 54498527Sfenner 54598527Sfenner case T_TSIG: 54698527Sfenner { 54775118Sfenner if (cp + len > snapend) 54875118Sfenner return(NULL); 54998527Sfenner if (!vflag) 55098527Sfenner break; 55198527Sfenner putchar(' '); 55298527Sfenner if ((cp = ns_nprint(cp, bp)) == NULL) 55398527Sfenner return(NULL); 55498527Sfenner cp += 6; 55598527Sfenner if (!TTEST2(*cp, 2)) 55698527Sfenner return(NULL); 55798527Sfenner printf(" fudge=%u", EXTRACT_16BITS(cp)); 55898527Sfenner cp += 2; 55998527Sfenner if (!TTEST2(*cp, 2)) 56098527Sfenner return(NULL); 56198527Sfenner printf(" maclen=%u", EXTRACT_16BITS(cp)); 56298527Sfenner cp += 2 + EXTRACT_16BITS(cp); 56398527Sfenner if (!TTEST2(*cp, 2)) 56498527Sfenner return(NULL); 56598527Sfenner printf(" origid=%u", EXTRACT_16BITS(cp)); 56698527Sfenner cp += 2; 56798527Sfenner if (!TTEST2(*cp, 2)) 56898527Sfenner return(NULL); 56998527Sfenner printf(" error=%u", EXTRACT_16BITS(cp)); 57098527Sfenner cp += 2; 57198527Sfenner if (!TTEST2(*cp, 2)) 57298527Sfenner return(NULL); 57398527Sfenner printf(" otherlen=%u", EXTRACT_16BITS(cp)); 57498527Sfenner cp += 2; 57598527Sfenner } 57617680Spst } 57726183Sfenner return (rp); /* XXX This isn't always right */ 57817680Spst} 57917680Spst 58017680Spstvoid 581127675Sbmsns_print(register const u_char *bp, u_int length, int is_mdns) 58217680Spst{ 58317680Spst register const HEADER *np; 58417680Spst register int qdcount, ancount, nscount, arcount; 58598527Sfenner register const u_char *cp; 586127675Sbms u_int16_t b2; 58717680Spst 58817680Spst np = (const HEADER *)bp; 58980234Sfenner TCHECK(*np); 59017680Spst /* get the byte-order right */ 591127675Sbms qdcount = EXTRACT_16BITS(&np->qdcount); 592127675Sbms ancount = EXTRACT_16BITS(&np->ancount); 593127675Sbms nscount = EXTRACT_16BITS(&np->nscount); 594127675Sbms arcount = EXTRACT_16BITS(&np->arcount); 59517680Spst 59675118Sfenner if (DNS_QR(np)) { 59717680Spst /* this is a response */ 598172686Smlaier printf("%d%s%s%s%s%s%s", 599127675Sbms EXTRACT_16BITS(&np->id), 60075118Sfenner ns_ops[DNS_OPCODE(np)], 60175118Sfenner ns_resp[DNS_RCODE(np)], 60275118Sfenner DNS_AA(np)? "*" : "", 60375118Sfenner DNS_RA(np)? "" : "-", 60475118Sfenner DNS_TC(np)? "|" : "", 605127675Sbms DNS_AD(np)? "$" : ""); 60675118Sfenner 60717680Spst if (qdcount != 1) 60817680Spst printf(" [%dq]", qdcount); 60917680Spst /* Print QUESTION section on -vv */ 61098527Sfenner cp = (const u_char *)(np + 1); 61198527Sfenner while (qdcount--) { 612127675Sbms if (qdcount < EXTRACT_16BITS(&np->qdcount) - 1) 61398527Sfenner putchar(','); 61498527Sfenner if (vflag > 1) { 61598527Sfenner fputs(" q:", stdout); 616127675Sbms if ((cp = ns_qprint(cp, bp, is_mdns)) == NULL) 61798527Sfenner goto trunc; 61898527Sfenner } else { 619127675Sbms if ((cp = ns_nskip(cp)) == NULL) 62098527Sfenner goto trunc; 62198527Sfenner cp += 4; /* skip QTYPE and QCLASS */ 62298527Sfenner } 62375118Sfenner } 62417680Spst printf(" %d/%d/%d", ancount, nscount, arcount); 62517680Spst if (ancount--) { 626127675Sbms if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 62775118Sfenner goto trunc; 62898527Sfenner while (cp < snapend && ancount--) { 62917680Spst putchar(','); 630127675Sbms if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 63175118Sfenner goto trunc; 63217680Spst } 63317680Spst } 63498527Sfenner if (ancount > 0) 63598527Sfenner goto trunc; 63675118Sfenner /* Print NS and AR sections on -vv */ 63775118Sfenner if (vflag > 1) { 63898527Sfenner if (cp < snapend && nscount--) { 63975118Sfenner fputs(" ns:", stdout); 640127675Sbms if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 64175118Sfenner goto trunc; 64298527Sfenner while (cp < snapend && nscount--) { 64375118Sfenner putchar(','); 644127675Sbms if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 64575118Sfenner goto trunc; 64675118Sfenner } 64775118Sfenner } 64898527Sfenner if (nscount > 0) 64998527Sfenner goto trunc; 65098527Sfenner if (cp < snapend && arcount--) { 65175118Sfenner fputs(" ar:", stdout); 652127675Sbms if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 65375118Sfenner goto trunc; 65498527Sfenner while (cp < snapend && arcount--) { 65575118Sfenner putchar(','); 656127675Sbms if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 65775118Sfenner goto trunc; 65875118Sfenner } 65975118Sfenner } 66098527Sfenner if (arcount > 0) 66198527Sfenner goto trunc; 66275118Sfenner } 66317680Spst } 66417680Spst else { 66517680Spst /* this is a request */ 666172686Smlaier printf("%d%s%s%s", EXTRACT_16BITS(&np->id), ns_ops[DNS_OPCODE(np)], 66775118Sfenner DNS_RD(np) ? "+" : "", 668127675Sbms DNS_CD(np) ? "%" : ""); 66917680Spst 67017680Spst /* any weirdness? */ 671127675Sbms b2 = EXTRACT_16BITS(((u_short *)np)+1); 672127675Sbms if (b2 & 0x6cf) 673127675Sbms printf(" [b2&3=0x%x]", b2); 67417680Spst 67575118Sfenner if (DNS_OPCODE(np) == IQUERY) { 67617680Spst if (qdcount) 67717680Spst printf(" [%dq]", qdcount); 67817680Spst if (ancount != 1) 67917680Spst printf(" [%da]", ancount); 68017680Spst } 68117680Spst else { 68217680Spst if (ancount) 68317680Spst printf(" [%da]", ancount); 68417680Spst if (qdcount != 1) 68517680Spst printf(" [%dq]", qdcount); 68617680Spst } 68717680Spst if (nscount) 68817680Spst printf(" [%dn]", nscount); 68917680Spst if (arcount) 69017680Spst printf(" [%dau]", arcount); 69117680Spst 69298527Sfenner cp = (const u_char *)(np + 1); 69375118Sfenner if (qdcount--) { 694127675Sbms cp = ns_qprint(cp, (const u_char *)np, is_mdns); 69575118Sfenner if (!cp) 69675118Sfenner goto trunc; 69798527Sfenner while (cp < snapend && qdcount--) { 69875118Sfenner cp = ns_qprint((const u_char *)cp, 699127675Sbms (const u_char *)np, 700127675Sbms is_mdns); 70175118Sfenner if (!cp) 70275118Sfenner goto trunc; 70375118Sfenner } 70475118Sfenner } 70598527Sfenner if (qdcount > 0) 70698527Sfenner goto trunc; 70775118Sfenner 70875118Sfenner /* Print remaining sections on -vv */ 70975118Sfenner if (vflag > 1) { 71075118Sfenner if (ancount--) { 711127675Sbms if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 71275118Sfenner goto trunc; 71398527Sfenner while (cp < snapend && ancount--) { 71475118Sfenner putchar(','); 715127675Sbms if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 71675118Sfenner goto trunc; 71775118Sfenner } 71875118Sfenner } 71998527Sfenner if (ancount > 0) 72098527Sfenner goto trunc; 72198527Sfenner if (cp < snapend && nscount--) { 72275118Sfenner fputs(" ns:", stdout); 723127675Sbms if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 72475118Sfenner goto trunc; 72575118Sfenner while (nscount-- && cp < snapend) { 72675118Sfenner putchar(','); 727127675Sbms if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 72875118Sfenner goto trunc; 72975118Sfenner } 73075118Sfenner } 73198527Sfenner if (nscount > 0) 73298527Sfenner goto trunc; 73398527Sfenner if (cp < snapend && arcount--) { 73475118Sfenner fputs(" ar:", stdout); 735127675Sbms if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 73675118Sfenner goto trunc; 73798527Sfenner while (cp < snapend && arcount--) { 73875118Sfenner putchar(','); 739127675Sbms if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 74075118Sfenner goto trunc; 74175118Sfenner } 74275118Sfenner } 74398527Sfenner if (arcount > 0) 74498527Sfenner goto trunc; 74575118Sfenner } 74617680Spst } 74717680Spst printf(" (%d)", length); 74875118Sfenner return; 74975118Sfenner 75075118Sfenner trunc: 75175118Sfenner printf("[|domain]"); 75275118Sfenner return; 75317680Spst} 754