X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/af07258a7ed266ffe41fdc9d11d953fd0a033bba..a8c33a5850cd9d2f39e56c06b645c283225d78c4:/nameser.h diff --git a/nameser.h b/nameser.h index 54d70937..820458c2 100644 --- a/nameser.h +++ b/nameser.h @@ -33,14 +33,14 @@ * @(#)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 @@ -70,18 +70,15 @@ /* number of bytes of fixed size data in resource record */ #define RRFIXEDSZ 10 -/* - * Internet nameserver port number - */ -#define NAMESERVER_PORT 53 - /* * 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 +89,23 @@ #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 */ @@ -125,18 +139,52 @@ #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 T_ANY 255 /* wildcard match */ +#define T_URI 256 /* uri records [RFC7553] */ /* * Values for class field @@ -147,6 +195,8 @@ #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 @@ -157,136 +207,36 @@ #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_int16_t qdcount; /* number of question entries */ - u_int16_t ancount; /* number of answer entries */ - u_int16_t nscount; /* number of authority entries */ - u_int16_t arcount; /* number of resource entries */ -} HEADER; - -/* - * Defines for handling compressed domain names - */ -#define INDIR_MASK 0xc0 + nd_uint16_t id; /* query identification number */ + nd_uint16_t flags; /* QR, Opcode, AA, TC, RD, RA, RCODE */ + nd_uint16_t qdcount; /* number of question entries */ + nd_uint16_t ancount; /* number of answer entries */ + nd_uint16_t nscount; /* number of authority entries */ + nd_uint16_t arcount; /* number of resource entries */ +} dns_header_t; /* - * Structure for passing resource records around. + * Macros for subfields of flag fields. */ -struct rrec { - int16_t r_zone; /* zone number */ - int16_t r_class; /* class number */ - int16_t r_type; /* type number */ - u_int32_t r_ttl; /* time to live */ - int r_size; /* size of data area */ - 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" - * and that a "u_int32_t" holds 4 "chars". - * - * These macros demonstrate the property of C whereby it can be - * portable or it can be elegant but never both. - */ -#define GETSHORT(s, cp) { \ - register u_char *t_cp = (u_char *)(cp); \ - (s) = ((u_int16_t)t_cp[0] << 8) | (u_int16_t)t_cp[1]; \ - (cp) += 2; \ -} - -#define GETLONG(l, cp) { \ - register u_char *t_cp = (u_char *)(cp); \ - (l) = (((u_int32_t)t_cp[0]) << 24) \ - | (((u_int32_t)t_cp[1]) << 16) \ - | (((u_int32_t)t_cp[2]) << 8) \ - | (((u_int32_t)t_cp[3])); \ - (cp) += 4; \ -} - -#define PUTSHORT(s, cp) { \ - register u_int16_t t_s = (u_int16_t)(s); \ - register u_char *t_cp = (u_char *)(cp); \ - *t_cp++ = t_s >> 8; \ - *t_cp = t_s; \ - (cp) += 2; \ -} +#define DNS_QR(flags) ((flags) & 0x8000) /* response flag */ +#define DNS_OPCODE(flags) (((flags) >> 11) & 0xF) /* purpose of message */ +#define DNS_AA(flags) (flags & 0x0400) /* authoritative answer */ +#define DNS_TC(flags) (flags & 0x0200) /* truncated message */ +#define DNS_RD(flags) (flags & 0x0100) /* recursion desired */ +#define DNS_RA(flags) (flags & 0x0080) /* recursion available */ +#define DNS_AD(flags) (flags & 0x0020) /* authentic data from named */ +#define DNS_CD(flags) (flags & 0x0010) /* checking disabled by resolver */ +#define DNS_RCODE(flags) (flags & 0x000F) /* response code */ /* - * Warning: PUTLONG --no-longer-- destroys its first argument. if you - * were depending on this "feature", you will lose. + * Defines for handling compressed domain names, EDNS0 labels, etc. */ -#define PUTLONG(l, cp) { \ - register u_int32_t t_l = (u_int32_t)(l); \ - register u_char *t_cp = (u_char *)(cp); \ - *t_cp++ = t_l >> 24; \ - *t_cp++ = t_l >> 16; \ - *t_cp++ = t_l >> 8; \ - *t_cp = t_l; \ - (cp) += 4; \ -} +#define INDIR_MASK 0xc0 /* 11.... */ +#define EDNS0_MASK 0x40 /* 01.... */ +# define EDNS0_ELT_BITLABEL 0x01 #endif /* !_NAMESER_H_ */