print-domain.c revision 190207
10Sstevel@tonic-gate/* 20Sstevel@tonic-gate * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997 30Sstevel@tonic-gate * The Regents of the University of California. All rights reserved. 40Sstevel@tonic-gate * 51617Sgovinda * Redistribution and use in source and binary forms, with or without 61617Sgovinda * modification, are permitted provided that: (1) source code distributions 70Sstevel@tonic-gate * retain the above copyright notice and this paragraph in its entirety, (2) 80Sstevel@tonic-gate * distributions including binary code include the above copyright notice and 90Sstevel@tonic-gate * this paragraph in its entirety in the documentation or other materials 100Sstevel@tonic-gate * provided with the distribution, and (3) all advertising materials mentioning 110Sstevel@tonic-gate * features or use of this software display the following acknowledgement: 120Sstevel@tonic-gate * ``This product includes software developed by the University of California, 130Sstevel@tonic-gate * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 140Sstevel@tonic-gate * the University nor the names of its contributors may be used to endorse 150Sstevel@tonic-gate * or promote products derived from this software without specific prior 160Sstevel@tonic-gate * written permission. 170Sstevel@tonic-gate * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 180Sstevel@tonic-gate * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 190Sstevel@tonic-gate * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 200Sstevel@tonic-gate * 210Sstevel@tonic-gate * $FreeBSD: head/contrib/tcpdump/print-domain.c 190207 2009-03-21 18:30:25Z rpaulo $ 2212619Sandrew.rutz@sun.com */ 230Sstevel@tonic-gate 240Sstevel@tonic-gate#ifndef lint 250Sstevel@tonic-gatestatic const char rcsid[] _U_ = 260Sstevel@tonic-gate "@(#) $Header: /tcpdump/master/tcpdump/print-domain.c,v 1.97.2.1 2007-12-09 01:51:12 guy Exp $ (LBL)"; 270Sstevel@tonic-gate#endif 280Sstevel@tonic-gate 290Sstevel@tonic-gate#ifdef HAVE_CONFIG_H 300Sstevel@tonic-gate#include "config.h" 310Sstevel@tonic-gate#endif 320Sstevel@tonic-gate 330Sstevel@tonic-gate#include <tcpdump-stdinc.h> 340Sstevel@tonic-gate 350Sstevel@tonic-gate#include "nameser.h" 360Sstevel@tonic-gate 370Sstevel@tonic-gate#include <stdio.h> 380Sstevel@tonic-gate#include <string.h> 390Sstevel@tonic-gate 400Sstevel@tonic-gate#include "interface.h" 410Sstevel@tonic-gate#include "addrtoname.h" 420Sstevel@tonic-gate#include "extract.h" /* must come after interface.h */ 430Sstevel@tonic-gate 440Sstevel@tonic-gatestatic const char *ns_ops[] = { 4527Sjchu "", " inv_q", " stat", " op3", " notify", " update", " op6", " op7", 4627Sjchu " op8", " updataA", " updateD", " updateDA", 4727Sjchu " updateM", " updateMA", " zoneInit", " zoneRef", 4827Sjchu}; 4927Sjchu 5027Sjchustatic const char *ns_resp[] = { 5127Sjchu "", " FormErr", " ServFail", " NXDomain", 5227Sjchu " NotImp", " Refused", " YXDomain", " YXRRSet", 5327Sjchu " NXRRSet", " NotAuth", " NotZone", " Resp11", 5427Sjchu " Resp12", " Resp13", " Resp14", " NoChange", 5527Sjchu}; 5627Sjchu 5727Sjchu/* skip over a domain name */ 5827Sjchustatic const u_char * 5927Sjchuns_nskip(register const u_char *cp) 6027Sjchu{ 6127Sjchu register u_char i; 620Sstevel@tonic-gate 630Sstevel@tonic-gate if (!TTEST2(*cp, 1)) 641648Sjchu return (NULL); 651648Sjchu i = *cp++; 661648Sjchu while (i) { 671648Sjchu if ((i & INDIR_MASK) == INDIR_MASK) 681648Sjchu return (cp + 1); 691648Sjchu if ((i & INDIR_MASK) == EDNS0_MASK) { 701648Sjchu int bitlen, bytelen; 712426Sschwartz 722426Sschwartz if ((i & ~INDIR_MASK) != EDNS0_ELT_BITLABEL) 732426Sschwartz return(NULL); /* unknown ELT */ 742426Sschwartz if (!TTEST2(*cp, 1)) 752426Sschwartz return (NULL); 762426Sschwartz if ((bitlen = *cp++) == 0) 772426Sschwartz bitlen = 256; 782426Sschwartz bytelen = (bitlen + 7) / 8; 792426Sschwartz cp += bytelen; 801648Sjchu } else 811648Sjchu cp += i; 821648Sjchu if (!TTEST2(*cp, 1)) 831648Sjchu return (NULL); 841648Sjchu i = *cp++; 851648Sjchu } 861648Sjchu return (cp); 871648Sjchu} 881648Sjchu 890Sstevel@tonic-gate/* print a <domain-name> */ 902426Sschwartzstatic const u_char * 910Sstevel@tonic-gateblabel_print(const u_char *cp) 920Sstevel@tonic-gate{ 930Sstevel@tonic-gate int bitlen, slen, b; 940Sstevel@tonic-gate const u_char *bitp, *lim; 951772Sjl139090 char tc; 964701Sgovinda 971772Sjl139090 if (!TTEST2(*cp, 1)) 980Sstevel@tonic-gate return(NULL); 991648Sjchu if ((bitlen = *cp) == 0) 1000Sstevel@tonic-gate bitlen = 256; 1010Sstevel@tonic-gate slen = (bitlen + 3) / 4; 1020Sstevel@tonic-gate lim = cp + 1 + slen; 1030Sstevel@tonic-gate 1040Sstevel@tonic-gate /* print the bit string as a hex string */ 1050Sstevel@tonic-gate printf("\\[x"); 1060Sstevel@tonic-gate for (bitp = cp + 1, b = bitlen; bitp < lim && b > 7; b -= 8, bitp++) { 1070Sstevel@tonic-gate TCHECK(*bitp); 1083274Set142600 printf("%02x", *bitp); 10927Sjchu } 11027Sjchu if (b > 4) { 11127Sjchu TCHECK(*bitp); 11227Sjchu tc = *bitp++; 11312619Sandrew.rutz@sun.com printf("%02x", tc & (0xff << (8 - b))); 11412619Sandrew.rutz@sun.com } else if (b > 0) { 1152276Sschwartz TCHECK(*bitp); 1162276Sschwartz tc = *bitp++; 1172276Sschwartz printf("%1x", ((tc >> 4) & 0x0f) & (0x0f << (4 - b))); 1180Sstevel@tonic-gate } 1190Sstevel@tonic-gate printf("/%d]", bitlen); 1201648Sjchu return lim; 1211648Sjchutrunc: 1223274Set142600 printf(".../%d]", bitlen); 1233274Set142600 return NULL; 1243274Set142600} 1253274Set142600 1260Sstevel@tonic-gatestatic int 1270Sstevel@tonic-gatelabellen(const u_char *cp) 1280Sstevel@tonic-gate{ 1290Sstevel@tonic-gate register u_int i; 1300Sstevel@tonic-gate 1310Sstevel@tonic-gate if (!TTEST2(*cp, 1)) 1320Sstevel@tonic-gate return(-1); 1330Sstevel@tonic-gate i = *cp; 1340Sstevel@tonic-gate if ((i & INDIR_MASK) == EDNS0_MASK) { 1350Sstevel@tonic-gate int bitlen, elt; 1360Sstevel@tonic-gate if ((elt = (i & ~INDIR_MASK)) != EDNS0_ELT_BITLABEL) { 1370Sstevel@tonic-gate printf("<ELT %d>", elt); 1380Sstevel@tonic-gate return(-1); 1390Sstevel@tonic-gate } 1400Sstevel@tonic-gate if (!TTEST2(*(cp + 1), 1)) 1410Sstevel@tonic-gate return(-1); 1420Sstevel@tonic-gate if ((bitlen = *(cp + 1)) == 0) 1430Sstevel@tonic-gate bitlen = 256; 1440Sstevel@tonic-gate return(((bitlen + 7) / 8) + 1); 1450Sstevel@tonic-gate } else 1460Sstevel@tonic-gate return(i); 1470Sstevel@tonic-gate} 1480Sstevel@tonic-gate 1490Sstevel@tonic-gatestatic const u_char * 1500Sstevel@tonic-gatens_nprint(register const u_char *cp, register const u_char *bp) 1510Sstevel@tonic-gate{ 1520Sstevel@tonic-gate register u_int i, l; 1530Sstevel@tonic-gate register const u_char *rp = NULL; 1540Sstevel@tonic-gate register int compress = 0; 1550Sstevel@tonic-gate int chars_processed; 15610923SEvan.Yan@Sun.COM int elt; 15710923SEvan.Yan@Sun.COM int data_size = snapend - bp; 15810923SEvan.Yan@Sun.COM 15910923SEvan.Yan@Sun.COM if ((l = labellen(cp)) == (u_int)-1) 16010923SEvan.Yan@Sun.COM return(NULL); 16110923SEvan.Yan@Sun.COM if (!TTEST2(*cp, 1)) 16210923SEvan.Yan@Sun.COM return(NULL); 16310923SEvan.Yan@Sun.COM chars_processed = 1; 1640Sstevel@tonic-gate if (((i = *cp++) & INDIR_MASK) != INDIR_MASK) { 1650Sstevel@tonic-gate compress = 0; 1661772Sjl139090 rp = cp + l; 1671772Sjl139090 } 1680Sstevel@tonic-gate 1690Sstevel@tonic-gate if (i != 0) 1700Sstevel@tonic-gate while (i && cp < snapend) { 1710Sstevel@tonic-gate if ((i & INDIR_MASK) == INDIR_MASK) { 1720Sstevel@tonic-gate if (!compress) { 1730Sstevel@tonic-gate rp = cp + 1; 1740Sstevel@tonic-gate compress = 1; 1750Sstevel@tonic-gate } 1760Sstevel@tonic-gate if (!TTEST2(*cp, 1)) 1771772Sjl139090 return(NULL); 1780Sstevel@tonic-gate cp = bp + (((i << 8) | *cp) & 0x3fff); 1791772Sjl139090 if ((l = labellen(cp)) == (u_int)-1) 1801772Sjl139090 return(NULL); 1811772Sjl139090 if (!TTEST2(*cp, 1)) 1821772Sjl139090 return(NULL); 1831772Sjl139090 i = *cp++; 1841772Sjl139090 chars_processed++; 1850Sstevel@tonic-gate 1860Sstevel@tonic-gate /* 1870Sstevel@tonic-gate * If we've looked at every character in 1881772Sjl139090 * the message, this pointer will make 1890Sstevel@tonic-gate * us look at some character again, 1901772Sjl139090 * which means we're looping. 1914886Sdwoods */ 1921772Sjl139090 if (chars_processed >= data_size) { 1931772Sjl139090 printf("<LOOP>"); 1944886Sdwoods return (NULL); 1951772Sjl139090 } 1968691SLida.Horn@Sun.COM continue; 1978691SLida.Horn@Sun.COM } 1981772Sjl139090 if ((i & INDIR_MASK) == EDNS0_MASK) { 1990Sstevel@tonic-gate elt = (i & ~INDIR_MASK); 2000Sstevel@tonic-gate switch(elt) { 2010Sstevel@tonic-gate case EDNS0_ELT_BITLABEL: 2020Sstevel@tonic-gate if (blabel_print(cp) == NULL) 2030Sstevel@tonic-gate return (NULL); 2040Sstevel@tonic-gate break; 2050Sstevel@tonic-gate default: 2060Sstevel@tonic-gate /* unknown ELT */ 2071772Sjl139090 printf("<ELT %d>", elt); 2080Sstevel@tonic-gate return(NULL); 2090Sstevel@tonic-gate } 2100Sstevel@tonic-gate } else { 2112091Sam139583 if (fn_printn(cp, l, snapend)) 2122091Sam139583 return(NULL); 2130Sstevel@tonic-gate } 2142091Sam139583 2152091Sam139583 cp += l; 2162091Sam139583 chars_processed += l; 2172091Sam139583 putchar('.'); 2182091Sam139583 if ((l = labellen(cp)) == (u_int)-1) 2192091Sam139583 return(NULL); 2202091Sam139583 if (!TTEST2(*cp, 1)) 2212091Sam139583 return(NULL); 2220Sstevel@tonic-gate i = *cp++; 2230Sstevel@tonic-gate chars_processed++; 2240Sstevel@tonic-gate if (!compress) 2250Sstevel@tonic-gate rp += l + 1; 2260Sstevel@tonic-gate } 2270Sstevel@tonic-gate else 2280Sstevel@tonic-gate putchar('.'); 2290Sstevel@tonic-gate return (rp); 2300Sstevel@tonic-gate} 2310Sstevel@tonic-gate 2320Sstevel@tonic-gate/* print a <character-string> */ 2330Sstevel@tonic-gatestatic const u_char * 2340Sstevel@tonic-gatens_cprint(register const u_char *cp) 2350Sstevel@tonic-gate{ 2360Sstevel@tonic-gate register u_int i; 2370Sstevel@tonic-gate 2380Sstevel@tonic-gate if (!TTEST2(*cp, 1)) 2390Sstevel@tonic-gate return (NULL); 2400Sstevel@tonic-gate i = *cp++; 2410Sstevel@tonic-gate if (fn_printn(cp, i, snapend)) 2420Sstevel@tonic-gate return (NULL); 2430Sstevel@tonic-gate return (cp + i); 2440Sstevel@tonic-gate} 2450Sstevel@tonic-gate 2460Sstevel@tonic-gate/* http://www.iana.org/assignments/dns-parameters */ 2470Sstevel@tonic-gatestruct tok ns_type2str[] = { 2480Sstevel@tonic-gate { T_A, "A" }, /* RFC 1035 */ 2490Sstevel@tonic-gate { T_NS, "NS" }, /* RFC 1035 */ 2500Sstevel@tonic-gate { T_MD, "MD" }, /* RFC 1035 */ 2510Sstevel@tonic-gate { T_MF, "MF" }, /* RFC 1035 */ 2520Sstevel@tonic-gate { T_CNAME, "CNAME" }, /* RFC 1035 */ 2530Sstevel@tonic-gate { T_SOA, "SOA" }, /* RFC 1035 */ 2540Sstevel@tonic-gate { T_MB, "MB" }, /* RFC 1035 */ 2550Sstevel@tonic-gate { T_MG, "MG" }, /* RFC 1035 */ 2560Sstevel@tonic-gate { T_MR, "MR" }, /* RFC 1035 */ 2570Sstevel@tonic-gate { T_NULL, "NULL" }, /* RFC 1035 */ 2580Sstevel@tonic-gate { T_WKS, "WKS" }, /* RFC 1035 */ 2590Sstevel@tonic-gate { T_PTR, "PTR" }, /* RFC 1035 */ 2600Sstevel@tonic-gate { T_HINFO, "HINFO" }, /* RFC 1035 */ 2610Sstevel@tonic-gate { T_MINFO, "MINFO" }, /* RFC 1035 */ 2620Sstevel@tonic-gate { T_MX, "MX" }, /* RFC 1035 */ 2630Sstevel@tonic-gate { T_TXT, "TXT" }, /* RFC 1035 */ 2640Sstevel@tonic-gate { T_RP, "RP" }, /* RFC 1183 */ 2650Sstevel@tonic-gate { T_AFSDB, "AFSDB" }, /* RFC 1183 */ 2660Sstevel@tonic-gate { T_X25, "X25" }, /* RFC 1183 */ 2670Sstevel@tonic-gate { T_ISDN, "ISDN" }, /* RFC 1183 */ 2680Sstevel@tonic-gate { T_RT, "RT" }, /* RFC 1183 */ 2690Sstevel@tonic-gate { T_NSAP, "NSAP" }, /* RFC 1706 */ 2700Sstevel@tonic-gate { T_NSAP_PTR, "NSAP_PTR" }, 2710Sstevel@tonic-gate { T_SIG, "SIG" }, /* RFC 2535 */ 2720Sstevel@tonic-gate { T_KEY, "KEY" }, /* RFC 2535 */ 2730Sstevel@tonic-gate { T_PX, "PX" }, /* RFC 2163 */ 2740Sstevel@tonic-gate { T_GPOS, "GPOS" }, /* RFC 1712 */ 2750Sstevel@tonic-gate { T_AAAA, "AAAA" }, /* RFC 1886 */ 2760Sstevel@tonic-gate { T_LOC, "LOC" }, /* RFC 1876 */ 277118Sjchu { T_NXT, "NXT" }, /* RFC 2535 */ 278118Sjchu { T_EID, "EID" }, /* Nimrod */ 279118Sjchu { T_NIMLOC, "NIMLOC" }, /* Nimrod */ 280118Sjchu { T_SRV, "SRV" }, /* RFC 2782 */ 281118Sjchu { T_ATMA, "ATMA" }, /* ATM Forum */ 282118Sjchu { T_NAPTR, "NAPTR" }, /* RFC 2168, RFC 2915 */ 283118Sjchu { T_KX, "KX" }, /* RFC 2230 */ 2840Sstevel@tonic-gate { T_CERT, "CERT" }, /* RFC 2538 */ 2852426Sschwartz { T_A6, "A6" }, /* RFC 2874 */ 2862426Sschwartz { T_DNAME, "DNAME" }, /* RFC 2672 */ 2870Sstevel@tonic-gate { T_SINK, "SINK" }, 2882426Sschwartz { T_OPT, "OPT" }, /* RFC 2671 */ 2890Sstevel@tonic-gate { T_APL, "APL" }, /* RFC 3123 */ 2900Sstevel@tonic-gate { T_DS, "DS" }, /* RFC 4034 */ 2912426Sschwartz { T_SSHFP, "SSHFP" }, /* RFC 4255 */ 2920Sstevel@tonic-gate { T_IPSECKEY, "IPSECKEY" }, /* RFC 4025 */ 2931772Sjl139090 { T_RRSIG, "RRSIG" }, /* RFC 4034 */ 2940Sstevel@tonic-gate { T_NSEC, "NSEC" }, /* RFC 4034 */ 2952276Sschwartz { T_DNSKEY, "DNSKEY" }, /* RFC 4034 */ 2962276Sschwartz { T_SPF, "SPF" }, /* RFC-schlitt-spf-classic-02.txt */ 2972276Sschwartz { T_UINFO, "UINFO" }, 2982276Sschwartz { T_UID, "UID" }, 2992276Sschwartz { T_GID, "GID" }, 3000Sstevel@tonic-gate { T_UNSPEC, "UNSPEC" }, 3010Sstevel@tonic-gate { T_UNSPECA, "UNSPECA" }, 3020Sstevel@tonic-gate { T_TKEY, "TKEY" }, /* RFC 2930 */ 3030Sstevel@tonic-gate { T_TSIG, "TSIG" }, /* RFC 2845 */ 3040Sstevel@tonic-gate { T_IXFR, "IXFR" }, /* RFC 1995 */ 3050Sstevel@tonic-gate { T_AXFR, "AXFR" }, /* RFC 1035 */ 3060Sstevel@tonic-gate { T_MAILB, "MAILB" }, /* RFC 1035 */ 3070Sstevel@tonic-gate { T_MAILA, "MAILA" }, /* RFC 1035 */ 3080Sstevel@tonic-gate { T_ANY, "ANY" }, 3090Sstevel@tonic-gate { 0, NULL } 3100Sstevel@tonic-gate}; 3110Sstevel@tonic-gate 3120Sstevel@tonic-gatestruct tok ns_class2str[] = { 3130Sstevel@tonic-gate { C_IN, "IN" }, /* Not used */ 3140Sstevel@tonic-gate { C_CHAOS, "CHAOS" }, 3151772Sjl139090 { C_HS, "HS" }, 3161772Sjl139090 { C_ANY, "ANY" }, 3171772Sjl139090 { 0, NULL } 3181772Sjl139090}; 3190Sstevel@tonic-gate 3200Sstevel@tonic-gate/* print a query */ 3211617Sgovindastatic const u_char * 3221617Sgovindans_qprint(register const u_char *cp, register const u_char *bp, int is_mdns) 3230Sstevel@tonic-gate{ 3240Sstevel@tonic-gate register const u_char *np = cp; 3250Sstevel@tonic-gate register u_int i, class; 3261617Sgovinda 3271772Sjl139090 cp = ns_nskip(cp); 3281772Sjl139090 3291772Sjl139090 if (cp == NULL || !TTEST2(*cp, 4)) 3301772Sjl139090 return(NULL); 33110923SEvan.Yan@Sun.COM 33212619Sandrew.rutz@sun.com /* print the qtype */ 33312619Sandrew.rutz@sun.com i = EXTRACT_16BITS(cp); 3341772Sjl139090 cp += 2; 3350Sstevel@tonic-gate printf(" %s", tok2str(ns_type2str, "Type%d", i)); 3360Sstevel@tonic-gate /* print the qclass (if it's not IN) */ 3370Sstevel@tonic-gate i = EXTRACT_16BITS(cp); 3380Sstevel@tonic-gate cp += 2; 3390Sstevel@tonic-gate if (is_mdns) 3400Sstevel@tonic-gate class = (i & ~C_QU); 3410Sstevel@tonic-gate else 3420Sstevel@tonic-gate class = i; 3430Sstevel@tonic-gate if (class != C_IN) 3440Sstevel@tonic-gate printf(" %s", tok2str(ns_class2str, "(Class %d)", class)); 3450Sstevel@tonic-gate if (is_mdns) { 3460Sstevel@tonic-gate if (i & C_QU) 3470Sstevel@tonic-gate printf(" (QU)"); 3480Sstevel@tonic-gate else 3490Sstevel@tonic-gate printf(" (QM)"); 3500Sstevel@tonic-gate } 3510Sstevel@tonic-gate 3520Sstevel@tonic-gate fputs("? ", stdout); 3530Sstevel@tonic-gate cp = ns_nprint(np, bp); 3540Sstevel@tonic-gate return(cp ? cp + 4 : NULL); 3550Sstevel@tonic-gate} 3560Sstevel@tonic-gate 3570Sstevel@tonic-gate/* print a reply */ 3580Sstevel@tonic-gatestatic const u_char * 3590Sstevel@tonic-gatens_rprint(register const u_char *cp, register const u_char *bp, int is_mdns) 3600Sstevel@tonic-gate{ 3610Sstevel@tonic-gate register u_int i, class, opt_flags = 0; 3620Sstevel@tonic-gate register u_short typ, len; 3630Sstevel@tonic-gate register const u_char *rp; 3640Sstevel@tonic-gate 3650Sstevel@tonic-gate if (vflag) { 3660Sstevel@tonic-gate putchar(' '); 3670Sstevel@tonic-gate if ((cp = ns_nprint(cp, bp)) == NULL) 3680Sstevel@tonic-gate return NULL; 3690Sstevel@tonic-gate } else 3700Sstevel@tonic-gate cp = ns_nskip(cp); 3710Sstevel@tonic-gate 3720Sstevel@tonic-gate if (cp == NULL || !TTEST2(*cp, 10)) 3730Sstevel@tonic-gate return (snapend); 3740Sstevel@tonic-gate 3750Sstevel@tonic-gate /* print the type/qtype */ 3760Sstevel@tonic-gate typ = EXTRACT_16BITS(cp); 3770Sstevel@tonic-gate cp += 2; 3780Sstevel@tonic-gate /* print the class (if it's not IN and the type isn't OPT) */ 3790Sstevel@tonic-gate i = EXTRACT_16BITS(cp); 3800Sstevel@tonic-gate cp += 2; 3810Sstevel@tonic-gate if (is_mdns) 3820Sstevel@tonic-gate class = (i & ~C_CACHE_FLUSH); 3830Sstevel@tonic-gate else 3840Sstevel@tonic-gate class = i; 3850Sstevel@tonic-gate if (class != C_IN && typ != T_OPT) 3860Sstevel@tonic-gate printf(" %s", tok2str(ns_class2str, "(Class %d)", class)); 3870Sstevel@tonic-gate if (is_mdns) { 3880Sstevel@tonic-gate if (i & C_CACHE_FLUSH) 3890Sstevel@tonic-gate printf(" (Cache flush)"); 3900Sstevel@tonic-gate } 3910Sstevel@tonic-gate 3920Sstevel@tonic-gate if (typ == T_OPT) { 3930Sstevel@tonic-gate /* get opt flags */ 3940Sstevel@tonic-gate cp += 2; 395118Sjchu opt_flags = EXTRACT_16BITS(cp); 396118Sjchu /* ignore rest of ttl field */ 397118Sjchu cp += 2; 3980Sstevel@tonic-gate } else if (vflag > 2) { 3993274Set142600 /* print ttl */ 400624Sschwartz printf(" ["); 4011772Sjl139090 relts_print(EXTRACT_32BITS(cp)); 4021772Sjl139090 printf("]"); 4031772Sjl139090 cp += 4; 4041772Sjl139090 } else { 4051772Sjl139090 /* ignore ttl */ 4061772Sjl139090 cp += 4; 4070Sstevel@tonic-gate } 4080Sstevel@tonic-gate 4090Sstevel@tonic-gate len = EXTRACT_16BITS(cp); 4100Sstevel@tonic-gate cp += 2; 4110Sstevel@tonic-gate 412 rp = cp + len; 413 414 printf(" %s", tok2str(ns_type2str, "Type%d", typ)); 415 if (rp > snapend) 416 return(NULL); 417 418 switch (typ) { 419 case T_A: 420 if (!TTEST2(*cp, sizeof(struct in_addr))) 421 return(NULL); 422 printf(" %s", intoa(htonl(EXTRACT_32BITS(cp)))); 423 break; 424 425 case T_NS: 426 case T_CNAME: 427 case T_PTR: 428#ifdef T_DNAME 429 case T_DNAME: 430#endif 431 putchar(' '); 432 if (ns_nprint(cp, bp) == NULL) 433 return(NULL); 434 break; 435 436 case T_SOA: 437 if (!vflag) 438 break; 439 putchar(' '); 440 if ((cp = ns_nprint(cp, bp)) == NULL) 441 return(NULL); 442 putchar(' '); 443 if ((cp = ns_nprint(cp, bp)) == NULL) 444 return(NULL); 445 if (!TTEST2(*cp, 5 * 4)) 446 return(NULL); 447 printf(" %u", EXTRACT_32BITS(cp)); 448 cp += 4; 449 printf(" %u", EXTRACT_32BITS(cp)); 450 cp += 4; 451 printf(" %u", EXTRACT_32BITS(cp)); 452 cp += 4; 453 printf(" %u", EXTRACT_32BITS(cp)); 454 cp += 4; 455 printf(" %u", EXTRACT_32BITS(cp)); 456 cp += 4; 457 break; 458 case T_MX: 459 putchar(' '); 460 if (!TTEST2(*cp, 2)) 461 return(NULL); 462 if (ns_nprint(cp + 2, bp) == NULL) 463 return(NULL); 464 printf(" %d", EXTRACT_16BITS(cp)); 465 break; 466 467 case T_TXT: 468 while (cp < rp) { 469 printf(" \""); 470 cp = ns_cprint(cp); 471 if (cp == NULL) 472 return(NULL); 473 putchar('"'); 474 } 475 break; 476 477 case T_SRV: 478 putchar(' '); 479 if (!TTEST2(*cp, 6)) 480 return(NULL); 481 if (ns_nprint(cp + 6, bp) == NULL) 482 return(NULL); 483 printf(":%d %d %d", EXTRACT_16BITS(cp + 4), 484 EXTRACT_16BITS(cp), EXTRACT_16BITS(cp + 2)); 485 break; 486 487#ifdef INET6 488 case T_AAAA: 489 { 490 struct in6_addr addr; 491 char ntop_buf[INET6_ADDRSTRLEN]; 492 493 if (!TTEST2(*cp, sizeof(struct in6_addr))) 494 return(NULL); 495 memcpy(&addr, cp, sizeof(struct in6_addr)); 496 printf(" %s", 497 inet_ntop(AF_INET6, &addr, ntop_buf, sizeof(ntop_buf))); 498 499 break; 500 } 501 502 case T_A6: 503 { 504 struct in6_addr a; 505 int pbit, pbyte; 506 char ntop_buf[INET6_ADDRSTRLEN]; 507 508 if (!TTEST2(*cp, 1)) 509 return(NULL); 510 pbit = *cp; 511 pbyte = (pbit & ~7) / 8; 512 if (pbit > 128) { 513 printf(" %u(bad plen)", pbit); 514 break; 515 } else if (pbit < 128) { 516 if (!TTEST2(*(cp + 1), sizeof(a) - pbyte)) 517 return(NULL); 518 memset(&a, 0, sizeof(a)); 519 memcpy(&a.s6_addr[pbyte], cp + 1, sizeof(a) - pbyte); 520 printf(" %u %s", pbit, 521 inet_ntop(AF_INET6, &a, ntop_buf, sizeof(ntop_buf))); 522 } 523 if (pbit > 0) { 524 putchar(' '); 525 if (ns_nprint(cp + 1 + sizeof(a) - pbyte, bp) == NULL) 526 return(NULL); 527 } 528 break; 529 } 530#endif /*INET6*/ 531 532 case T_OPT: 533 printf(" UDPsize=%u", class); 534 if (opt_flags & 0x8000) 535 printf(" OK"); 536 break; 537 538 case T_UNSPECA: /* One long string */ 539 if (!TTEST2(*cp, len)) 540 return(NULL); 541 if (fn_printn(cp, len, snapend)) 542 return(NULL); 543 break; 544 545 case T_TSIG: 546 { 547 if (cp + len > snapend) 548 return(NULL); 549 if (!vflag) 550 break; 551 putchar(' '); 552 if ((cp = ns_nprint(cp, bp)) == NULL) 553 return(NULL); 554 cp += 6; 555 if (!TTEST2(*cp, 2)) 556 return(NULL); 557 printf(" fudge=%u", EXTRACT_16BITS(cp)); 558 cp += 2; 559 if (!TTEST2(*cp, 2)) 560 return(NULL); 561 printf(" maclen=%u", EXTRACT_16BITS(cp)); 562 cp += 2 + EXTRACT_16BITS(cp); 563 if (!TTEST2(*cp, 2)) 564 return(NULL); 565 printf(" origid=%u", EXTRACT_16BITS(cp)); 566 cp += 2; 567 if (!TTEST2(*cp, 2)) 568 return(NULL); 569 printf(" error=%u", EXTRACT_16BITS(cp)); 570 cp += 2; 571 if (!TTEST2(*cp, 2)) 572 return(NULL); 573 printf(" otherlen=%u", EXTRACT_16BITS(cp)); 574 cp += 2; 575 } 576 } 577 return (rp); /* XXX This isn't always right */ 578} 579 580void 581ns_print(register const u_char *bp, u_int length, int is_mdns) 582{ 583 register const HEADER *np; 584 register int qdcount, ancount, nscount, arcount; 585 register const u_char *cp; 586 u_int16_t b2; 587 588 np = (const HEADER *)bp; 589 TCHECK(*np); 590 /* get the byte-order right */ 591 qdcount = EXTRACT_16BITS(&np->qdcount); 592 ancount = EXTRACT_16BITS(&np->ancount); 593 nscount = EXTRACT_16BITS(&np->nscount); 594 arcount = EXTRACT_16BITS(&np->arcount); 595 596 if (DNS_QR(np)) { 597 /* this is a response */ 598 printf("%d%s%s%s%s%s%s", 599 EXTRACT_16BITS(&np->id), 600 ns_ops[DNS_OPCODE(np)], 601 ns_resp[DNS_RCODE(np)], 602 DNS_AA(np)? "*" : "", 603 DNS_RA(np)? "" : "-", 604 DNS_TC(np)? "|" : "", 605 DNS_AD(np)? "$" : ""); 606 607 if (qdcount != 1) 608 printf(" [%dq]", qdcount); 609 /* Print QUESTION section on -vv */ 610 cp = (const u_char *)(np + 1); 611 while (qdcount--) { 612 if (qdcount < EXTRACT_16BITS(&np->qdcount) - 1) 613 putchar(','); 614 if (vflag > 1) { 615 fputs(" q:", stdout); 616 if ((cp = ns_qprint(cp, bp, is_mdns)) == NULL) 617 goto trunc; 618 } else { 619 if ((cp = ns_nskip(cp)) == NULL) 620 goto trunc; 621 cp += 4; /* skip QTYPE and QCLASS */ 622 } 623 } 624 printf(" %d/%d/%d", ancount, nscount, arcount); 625 if (ancount--) { 626 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 627 goto trunc; 628 while (cp < snapend && ancount--) { 629 putchar(','); 630 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 631 goto trunc; 632 } 633 } 634 if (ancount > 0) 635 goto trunc; 636 /* Print NS and AR sections on -vv */ 637 if (vflag > 1) { 638 if (cp < snapend && nscount--) { 639 fputs(" ns:", stdout); 640 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 641 goto trunc; 642 while (cp < snapend && nscount--) { 643 putchar(','); 644 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 645 goto trunc; 646 } 647 } 648 if (nscount > 0) 649 goto trunc; 650 if (cp < snapend && arcount--) { 651 fputs(" ar:", stdout); 652 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 653 goto trunc; 654 while (cp < snapend && arcount--) { 655 putchar(','); 656 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 657 goto trunc; 658 } 659 } 660 if (arcount > 0) 661 goto trunc; 662 } 663 } 664 else { 665 /* this is a request */ 666 printf("%d%s%s%s", EXTRACT_16BITS(&np->id), ns_ops[DNS_OPCODE(np)], 667 DNS_RD(np) ? "+" : "", 668 DNS_CD(np) ? "%" : ""); 669 670 /* any weirdness? */ 671 b2 = EXTRACT_16BITS(((u_short *)np)+1); 672 if (b2 & 0x6cf) 673 printf(" [b2&3=0x%x]", b2); 674 675 if (DNS_OPCODE(np) == IQUERY) { 676 if (qdcount) 677 printf(" [%dq]", qdcount); 678 if (ancount != 1) 679 printf(" [%da]", ancount); 680 } 681 else { 682 if (ancount) 683 printf(" [%da]", ancount); 684 if (qdcount != 1) 685 printf(" [%dq]", qdcount); 686 } 687 if (nscount) 688 printf(" [%dn]", nscount); 689 if (arcount) 690 printf(" [%dau]", arcount); 691 692 cp = (const u_char *)(np + 1); 693 if (qdcount--) { 694 cp = ns_qprint(cp, (const u_char *)np, is_mdns); 695 if (!cp) 696 goto trunc; 697 while (cp < snapend && qdcount--) { 698 cp = ns_qprint((const u_char *)cp, 699 (const u_char *)np, 700 is_mdns); 701 if (!cp) 702 goto trunc; 703 } 704 } 705 if (qdcount > 0) 706 goto trunc; 707 708 /* Print remaining sections on -vv */ 709 if (vflag > 1) { 710 if (ancount--) { 711 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 712 goto trunc; 713 while (cp < snapend && ancount--) { 714 putchar(','); 715 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 716 goto trunc; 717 } 718 } 719 if (ancount > 0) 720 goto trunc; 721 if (cp < snapend && nscount--) { 722 fputs(" ns:", stdout); 723 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 724 goto trunc; 725 while (nscount-- && cp < snapend) { 726 putchar(','); 727 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 728 goto trunc; 729 } 730 } 731 if (nscount > 0) 732 goto trunc; 733 if (cp < snapend && arcount--) { 734 fputs(" ar:", stdout); 735 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 736 goto trunc; 737 while (cp < snapend && arcount--) { 738 putchar(','); 739 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 740 goto trunc; 741 } 742 } 743 if (arcount > 0) 744 goto trunc; 745 } 746 } 747 printf(" (%d)", length); 748 return; 749 750 trunc: 751 printf("[|domain]"); 752 return; 753} 754