X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/af07258a7ed266ffe41fdc9d11d953fd0a033bba..refs/heads/tcpdump-4.0:/nameser.h diff --git a/nameser.h b/nameser.h index 54d70937..f441f3ea 100644 --- a/nameser.h +++ b/nameser.h @@ -1,3 +1,4 @@ +/* @(#) $Header: /tcpdump/master/tcpdump/nameser.h,v 1.16 2006-11-10 03:18:21 guy Exp $ (LBL) */ /* * Copyright (c) 1983, 1989, 1993 * The Regents of the University of California. All rights reserved. @@ -33,14 +34,14 @@ * @(#)nameser.h 8.2 (Berkeley) 2/16/94 * - * Portions Copyright (c) 1993 by Digital Equipment Corporation. - * + * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies, and that * the name of Digital Equipment Corporation not be used in advertising or * publicity pertaining to distribution of the document or software without * specific, written prior permission. - * + * * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT @@ -75,13 +76,24 @@ */ #define NAMESERVER_PORT 53 +/* + * Port for multicast DNS; see + * + * http://files.multicastdns.org/draft-cheshire-dnsext-multicastdns.txt + * + * for the current mDNS spec. + */ +#define MULTICASTDNS_PORT 5353 + /* * Currently defined opcodes */ #define QUERY 0x0 /* standard query */ #define IQUERY 0x1 /* inverse query */ #define STATUS 0x2 /* nameserver status query */ -/*#define xxx 0x3 /* 0x3 reserved */ +#if 0 +#define xxx 0x3 /* 0x3 reserved */ +#endif /* non standard - supports ALLOW_UPDATES stuff from Mike Schwartz */ #define UPDATEA 0x9 /* add resource record */ #define UPDATED 0xa /* delete a specific resource record */ @@ -92,6 +104,23 @@ #define ZONEINIT 0xe /* initial zone transfer */ #define ZONEREF 0xf /* incremental zone referesh */ +/* + * Undefine various #defines from various System V-flavored OSes (Solaris, + * SINIX, HP-UX) so the compiler doesn't whine that we redefine them. + */ +#ifdef T_NULL +#undef T_NULL +#endif +#ifdef T_OPT +#undef T_OPT +#endif +#ifdef T_UNSPEC +#undef T_UNSPEC +#endif +#ifdef NOERROR +#undef NOERROR +#endif + /* * Currently defined response codes */ @@ -125,14 +154,47 @@ #define T_TXT 16 /* text strings */ #define T_RP 17 /* responsible person */ #define T_AFSDB 18 /* AFS cell database */ +#define T_X25 19 /* X_25 calling address */ +#define T_ISDN 20 /* ISDN calling address */ +#define T_RT 21 /* router */ #define T_NSAP 22 /* NSAP address */ #define T_NSAP_PTR 23 /* reverse lookup for NSAP */ +#define T_SIG 24 /* security signature */ +#define T_KEY 25 /* security key */ +#define T_PX 26 /* X.400 mail mapping */ +#define T_GPOS 27 /* geographical position (withdrawn) */ +#define T_AAAA 28 /* IP6 Address */ +#define T_LOC 29 /* Location Information */ +#define T_NXT 30 /* Next Valid Name in Zone */ +#define T_EID 31 /* Endpoint identifier */ +#define T_NIMLOC 32 /* Nimrod locator */ +#define T_SRV 33 /* Server selection */ +#define T_ATMA 34 /* ATM Address */ +#define T_NAPTR 35 /* Naming Authority PoinTeR */ +#define T_KX 36 /* Key Exchanger */ +#define T_CERT 37 /* Certificates in the DNS */ +#define T_A6 38 /* IP6 address */ +#define T_DNAME 39 /* non-terminal redirection */ +#define T_SINK 40 /* unknown */ +#define T_OPT 41 /* EDNS0 option (meta-RR) */ +#define T_APL 42 /* lists of address prefixes */ +#define T_DS 43 /* Delegation Signer */ +#define T_SSHFP 44 /* SSH Fingerprint */ +#define T_IPSECKEY 45 /* IPsec keying material */ +#define T_RRSIG 46 /* new security signature */ +#define T_NSEC 47 /* provable insecure information */ +#define T_DNSKEY 48 /* new security key */ /* non standard */ +#define T_SPF 99 /* sender policy framework */ #define T_UINFO 100 /* user (finger) information */ #define T_UID 101 /* user ID */ #define T_GID 102 /* group ID */ #define T_UNSPEC 103 /* Unspecified format (binary data) */ +#define T_UNSPECA 104 /* "unspecified ascii". Ugly MIT hack */ /* Query type values which do not appear in resource records */ +#define T_TKEY 249 /* Transaction Key [RFC2930] */ +#define T_TSIG 250 /* Transaction Signature [RFC2845] */ +#define T_IXFR 251 /* incremental transfer [RFC1995] */ #define T_AXFR 252 /* transfer zone of authority */ #define T_MAILB 253 /* transfer mailbox records */ #define T_MAILA 254 /* transfer mail agent records */ @@ -147,6 +209,8 @@ #define C_HS 4 /* for Hesiod name server (MIT) (XXX) */ /* Query class values which do not appear in resource records */ #define C_ANY 255 /* wildcard match */ +#define C_QU 0x8000 /* mDNS QU flag in queries */ +#define C_CACHE_FLUSH 0x8000 /* mDNS cache flush flag in replies */ /* * Status return codes for T_UNSPEC conversion routines @@ -157,67 +221,13 @@ #define CONV_BADCKSUM -3 #define CONV_BADBUFLEN -4 -#ifndef BYTE_ORDER -#define LITTLE_ENDIAN 1234 /* least-significant byte first (vax, pc) */ -#define BIG_ENDIAN 4321 /* most-significant byte first (IBM, net) */ -#define PDP_ENDIAN 3412 /* LSB first in word, MSW first in long (pdp)*/ - -#ifdef WORDS_BIGENDIAN -#define BYTE_ORDER BIG_ENDIAN -#else -#define BYTE_ORDER LITTLE_ENDIAN -#endif /* WORDS_BIGENDIAN */ -#endif /* BYTE_ORDER */ - -#if !defined(BYTE_ORDER) || \ - (BYTE_ORDER != BIG_ENDIAN && BYTE_ORDER != LITTLE_ENDIAN && \ - BYTE_ORDER != PDP_ENDIAN) - /* you must determine what the correct bit order is for - * your compiler - the next line is an intentional error - * which will force your compiles to bomb until you fix - * the above macros. - */ - #error "Undefined or invalid BYTE_ORDER"; -#endif - /* - * Structure for query header. The order of the fields is machine- and - * compiler-dependent, depending on the byte/bit order and the layout - * of bit fields. We use bit fields only in int variables, as this - * is all ANSI requires. This requires a somewhat confusing rearrangement. + * Structure for query header. */ - typedef struct { u_int16_t id; /* query identification number */ -#if BYTE_ORDER == BIG_ENDIAN - /* fields in third byte */ - u_int qr:1; /* response flag */ - u_int opcode:4; /* purpose of message */ - u_int aa:1; /* authoritive answer */ - u_int tc:1; /* truncated message */ - u_int rd:1; /* recursion desired */ - /* fields in fourth byte */ - u_int ra:1; /* recursion available */ - u_int pr:1; /* primary server required (non standard) */ - u_int ad: 1; /* authentic data from named */ - u_int cd: 1; /* checking disabled by resolver */ - u_int rcode:4; /* response code */ -#endif -#if BYTE_ORDER == LITTLE_ENDIAN || BYTE_ORDER == PDP_ENDIAN - /* fields in third byte */ - u_int rd:1; /* recursion desired */ - u_int tc:1; /* truncated message */ - u_int aa:1; /* authoritive answer */ - u_int opcode:4; /* purpose of message */ - u_int qr:1; /* response flag */ - /* fields in fourth byte */ - u_int rcode:4; /* response code */ - u_int cd: 1; /* checking disabled by resolver */ - u_int ad: 1; /* authentic data from named */ - u_int pr:1; /* primary server required (non standard) */ - u_int ra:1; /* recursion available */ -#endif - /* remaining bytes */ + u_int8_t flags1; /* first byte of flags */ + u_int8_t flags2; /* second byte of flags */ u_int16_t qdcount; /* number of question entries */ u_int16_t ancount; /* number of answer entries */ u_int16_t nscount; /* number of authority entries */ @@ -225,9 +235,25 @@ typedef struct { } HEADER; /* - * Defines for handling compressed domain names + * Macros for subfields of flag fields. + */ +#define DNS_QR(np) ((np)->flags1 & 0x80) /* response flag */ +#define DNS_OPCODE(np) ((((np)->flags1) >> 3) & 0xF) /* purpose of message */ +#define DNS_AA(np) ((np)->flags1 & 0x04) /* authoritative answer */ +#define DNS_TC(np) ((np)->flags1 & 0x02) /* truncated message */ +#define DNS_RD(np) ((np)->flags1 & 0x01) /* recursion desired */ + +#define DNS_RA(np) ((np)->flags2 & 0x80) /* recursion available */ +#define DNS_AD(np) ((np)->flags2 & 0x20) /* authentic data from named */ +#define DNS_CD(np) ((np)->flags2 & 0x10) /* checking disabled by resolver */ +#define DNS_RCODE(np) ((np)->flags2 & 0xF) /* response code */ + +/* + * Defines for handling compressed domain names, EDNS0 labels, etc. */ -#define INDIR_MASK 0xc0 +#define INDIR_MASK 0xc0 /* 11.... */ +#define EDNS0_MASK 0x40 /* 01.... */ +# define EDNS0_ELT_BITLABEL 0x01 /* * Structure for passing resource records around. @@ -241,9 +267,6 @@ struct rrec { char *r_data; /* pointer to data */ }; -extern u_int16_t _getshort(); -extern u_int32_t _getlong(); - /* * Inline versions of get/put short/long. Pointer is advanced. * We also assume that a "u_int16_t" holds 2 "chars"