+/* @(#) $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.
* @(#)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
*/
#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 */
#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
*/
#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 */
#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
#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 */
} 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.
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"
projects / tcpdump / blobdiff