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503 lines
14 KiB
C
503 lines
14 KiB
C
/*
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* rrdef.h
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*
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* RR definitions
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*
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* a Net::DNS like library for C
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*
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* (c) NLnet Labs, 2005-2006
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*
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* See the file LICENSE for the license
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*/
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/**
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* \file
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*
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* Defines resource record types and constants.
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*/
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#ifndef LDNS_RRDEF_H
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#define LDNS_RRDEF_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/** Maximum length of a dname label */
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#define LDNS_MAX_LABELLEN 63
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/** Maximum length of a complete dname */
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#define LDNS_MAX_DOMAINLEN 255
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/** Maximum number of pointers in 1 dname */
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#define LDNS_MAX_POINTERS 65535
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/** The bytes TTL, CLASS and length use up in an rr */
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#define LDNS_RR_OVERHEAD 10
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#define LDNS_DNSSEC_KEYPROTO 3
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#define LDNS_KEY_ZONE_KEY 0x0100 /* set for ZSK&KSK, rfc 4034 */
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#define LDNS_KEY_SEP_KEY 0x0001 /* set for KSK, rfc 4034 */
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#define LDNS_KEY_REVOKE_KEY 0x0080 /* used to revoke KSK, rfc 5011 */
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/* The first fields are contiguous and can be referenced instantly */
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#define LDNS_RDATA_FIELD_DESCRIPTORS_COMMON 258
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/** lookuptable for rr classes */
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extern struct sldns_struct_lookup_table* sldns_rr_classes;
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/**
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* The different RR classes.
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*/
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enum sldns_enum_rr_class
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{
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/** the Internet */
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LDNS_RR_CLASS_IN = 1,
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/** Chaos class */
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LDNS_RR_CLASS_CH = 3,
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/** Hesiod (Dyer 87) */
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LDNS_RR_CLASS_HS = 4,
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/** None class, dynamic update */
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LDNS_RR_CLASS_NONE = 254,
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/** Any class */
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LDNS_RR_CLASS_ANY = 255,
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LDNS_RR_CLASS_FIRST = 0,
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LDNS_RR_CLASS_LAST = 65535,
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LDNS_RR_CLASS_COUNT = LDNS_RR_CLASS_LAST - LDNS_RR_CLASS_FIRST + 1
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};
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typedef enum sldns_enum_rr_class sldns_rr_class;
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/**
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* Used to specify whether compression is allowed.
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*/
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enum sldns_enum_rr_compress
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{
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/** compression is allowed */
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LDNS_RR_COMPRESS,
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LDNS_RR_NO_COMPRESS
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};
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typedef enum sldns_enum_rr_compress sldns_rr_compress;
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/**
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* The different RR types.
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*/
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enum sldns_enum_rr_type
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{
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/** a host address */
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LDNS_RR_TYPE_A = 1,
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/** an authoritative name server */
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LDNS_RR_TYPE_NS = 2,
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/** a mail destination (Obsolete - use MX) */
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LDNS_RR_TYPE_MD = 3,
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/** a mail forwarder (Obsolete - use MX) */
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LDNS_RR_TYPE_MF = 4,
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/** the canonical name for an alias */
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LDNS_RR_TYPE_CNAME = 5,
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/** marks the start of a zone of authority */
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LDNS_RR_TYPE_SOA = 6,
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/** a mailbox domain name (EXPERIMENTAL) */
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LDNS_RR_TYPE_MB = 7,
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/** a mail group member (EXPERIMENTAL) */
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LDNS_RR_TYPE_MG = 8,
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/** a mail rename domain name (EXPERIMENTAL) */
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LDNS_RR_TYPE_MR = 9,
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/** a null RR (EXPERIMENTAL) */
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LDNS_RR_TYPE_NULL = 10,
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/** a well known service description */
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LDNS_RR_TYPE_WKS = 11,
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/** a domain name pointer */
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LDNS_RR_TYPE_PTR = 12,
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/** host information */
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LDNS_RR_TYPE_HINFO = 13,
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/** mailbox or mail list information */
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LDNS_RR_TYPE_MINFO = 14,
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/** mail exchange */
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LDNS_RR_TYPE_MX = 15,
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/** text strings */
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LDNS_RR_TYPE_TXT = 16,
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/** RFC1183 */
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LDNS_RR_TYPE_RP = 17,
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/** RFC1183 */
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LDNS_RR_TYPE_AFSDB = 18,
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/** RFC1183 */
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LDNS_RR_TYPE_X25 = 19,
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/** RFC1183 */
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LDNS_RR_TYPE_ISDN = 20,
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/** RFC1183 */
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LDNS_RR_TYPE_RT = 21,
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/** RFC1706 */
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LDNS_RR_TYPE_NSAP = 22,
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/** RFC1348 */
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LDNS_RR_TYPE_NSAP_PTR = 23,
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/** 2535typecode */
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LDNS_RR_TYPE_SIG = 24,
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/** 2535typecode */
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LDNS_RR_TYPE_KEY = 25,
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/** RFC2163 */
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LDNS_RR_TYPE_PX = 26,
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/** RFC1712 */
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LDNS_RR_TYPE_GPOS = 27,
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/** ipv6 address */
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LDNS_RR_TYPE_AAAA = 28,
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/** LOC record RFC1876 */
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LDNS_RR_TYPE_LOC = 29,
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/** 2535typecode */
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LDNS_RR_TYPE_NXT = 30,
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/** draft-ietf-nimrod-dns-01.txt */
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LDNS_RR_TYPE_EID = 31,
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/** draft-ietf-nimrod-dns-01.txt */
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LDNS_RR_TYPE_NIMLOC = 32,
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/** SRV record RFC2782 */
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LDNS_RR_TYPE_SRV = 33,
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/** http://www.jhsoft.com/rfc/af-saa-0069.000.rtf */
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LDNS_RR_TYPE_ATMA = 34,
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/** RFC2915 */
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LDNS_RR_TYPE_NAPTR = 35,
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/** RFC2230 */
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LDNS_RR_TYPE_KX = 36,
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/** RFC2538 */
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LDNS_RR_TYPE_CERT = 37,
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/** RFC2874 */
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LDNS_RR_TYPE_A6 = 38,
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/** RFC2672 */
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LDNS_RR_TYPE_DNAME = 39,
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/** dnsind-kitchen-sink-02.txt */
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LDNS_RR_TYPE_SINK = 40,
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/** Pseudo OPT record... */
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LDNS_RR_TYPE_OPT = 41,
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/** RFC3123 */
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LDNS_RR_TYPE_APL = 42,
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/** RFC4034, RFC3658 */
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LDNS_RR_TYPE_DS = 43,
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/** SSH Key Fingerprint */
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LDNS_RR_TYPE_SSHFP = 44, /* RFC 4255 */
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/** IPsec Key */
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LDNS_RR_TYPE_IPSECKEY = 45, /* RFC 4025 */
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/** DNSSEC */
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LDNS_RR_TYPE_RRSIG = 46, /* RFC 4034 */
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LDNS_RR_TYPE_NSEC = 47, /* RFC 4034 */
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LDNS_RR_TYPE_DNSKEY = 48, /* RFC 4034 */
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LDNS_RR_TYPE_DHCID = 49, /* RFC 4701 */
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/* NSEC3 */
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LDNS_RR_TYPE_NSEC3 = 50, /* RFC 5155 */
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LDNS_RR_TYPE_NSEC3PARAM = 51, /* RFC 5155 */
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LDNS_RR_TYPE_NSEC3PARAMS = 51,
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LDNS_RR_TYPE_TLSA = 52, /* RFC 6698 */
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LDNS_RR_TYPE_HIP = 55, /* RFC 5205 */
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/** draft-reid-dnsext-zs */
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LDNS_RR_TYPE_NINFO = 56,
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/** draft-reid-dnsext-rkey */
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LDNS_RR_TYPE_RKEY = 57,
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/** draft-ietf-dnsop-trust-history */
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LDNS_RR_TYPE_TALINK = 58,
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LDNS_RR_TYPE_CDS = 59, /** RFC 7344 */
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LDNS_RR_TYPE_CDNSKEY = 60, /** RFC 7344 */
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LDNS_RR_TYPE_SPF = 99, /* RFC 4408 */
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LDNS_RR_TYPE_UINFO = 100,
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LDNS_RR_TYPE_UID = 101,
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LDNS_RR_TYPE_GID = 102,
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LDNS_RR_TYPE_UNSPEC = 103,
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LDNS_RR_TYPE_NID = 104, /* RFC 6742 */
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LDNS_RR_TYPE_L32 = 105, /* RFC 6742 */
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LDNS_RR_TYPE_L64 = 106, /* RFC 6742 */
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LDNS_RR_TYPE_LP = 107, /* RFC 6742 */
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/** draft-jabley-dnsext-eui48-eui64-rrtypes */
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LDNS_RR_TYPE_EUI48 = 108,
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LDNS_RR_TYPE_EUI64 = 109,
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LDNS_RR_TYPE_TKEY = 249, /* RFC 2930 */
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LDNS_RR_TYPE_TSIG = 250,
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LDNS_RR_TYPE_IXFR = 251,
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LDNS_RR_TYPE_AXFR = 252,
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/** A request for mailbox-related records (MB, MG or MR) */
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LDNS_RR_TYPE_MAILB = 253,
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/** A request for mail agent RRs (Obsolete - see MX) */
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LDNS_RR_TYPE_MAILA = 254,
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/** any type (wildcard) */
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LDNS_RR_TYPE_ANY = 255,
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LDNS_RR_TYPE_URI = 256, /* RFC 7553 */
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LDNS_RR_TYPE_CAA = 257, /* RFC 6844 */
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/** DNSSEC Trust Authorities */
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LDNS_RR_TYPE_TA = 32768,
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/* RFC 4431, 5074, DNSSEC Lookaside Validation */
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LDNS_RR_TYPE_DLV = 32769,
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/* type codes from nsec3 experimental phase
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LDNS_RR_TYPE_NSEC3 = 65324,
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LDNS_RR_TYPE_NSEC3PARAMS = 65325, */
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LDNS_RR_TYPE_FIRST = 0,
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LDNS_RR_TYPE_LAST = 65535,
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LDNS_RR_TYPE_COUNT = LDNS_RR_TYPE_LAST - LDNS_RR_TYPE_FIRST + 1
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};
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typedef enum sldns_enum_rr_type sldns_rr_type;
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/* RDATA */
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#define LDNS_MAX_RDFLEN 65535
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#define LDNS_RDF_SIZE_BYTE 1
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#define LDNS_RDF_SIZE_WORD 2
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#define LDNS_RDF_SIZE_DOUBLEWORD 4
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#define LDNS_RDF_SIZE_6BYTES 6
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#define LDNS_RDF_SIZE_8BYTES 8
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#define LDNS_RDF_SIZE_16BYTES 16
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#define LDNS_NSEC3_VARS_OPTOUT_MASK 0x01
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#define LDNS_APL_IP4 1
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#define LDNS_APL_IP6 2
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#define LDNS_APL_MASK 0x7f
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#define LDNS_APL_NEGATION 0x80
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/**
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* The different types of RDATA fields.
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*/
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enum sldns_enum_rdf_type
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{
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/** none */
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LDNS_RDF_TYPE_NONE,
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/** domain name */
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LDNS_RDF_TYPE_DNAME,
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/** 8 bits */
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LDNS_RDF_TYPE_INT8,
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/** 16 bits */
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LDNS_RDF_TYPE_INT16,
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/** 32 bits */
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LDNS_RDF_TYPE_INT32,
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/** A record */
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LDNS_RDF_TYPE_A,
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/** AAAA record */
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LDNS_RDF_TYPE_AAAA,
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/** txt string */
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LDNS_RDF_TYPE_STR,
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/** apl data */
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LDNS_RDF_TYPE_APL,
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/** b32 string */
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LDNS_RDF_TYPE_B32_EXT,
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/** b64 string */
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LDNS_RDF_TYPE_B64,
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/** hex string */
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LDNS_RDF_TYPE_HEX,
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/** nsec type codes */
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LDNS_RDF_TYPE_NSEC,
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/** a RR type */
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LDNS_RDF_TYPE_TYPE,
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/** a class */
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LDNS_RDF_TYPE_CLASS,
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/** certificate algorithm */
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LDNS_RDF_TYPE_CERT_ALG,
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/** a key algorithm */
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LDNS_RDF_TYPE_ALG,
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/** unknown types */
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LDNS_RDF_TYPE_UNKNOWN,
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/** time (32 bits) */
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LDNS_RDF_TYPE_TIME,
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/** period */
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LDNS_RDF_TYPE_PERIOD,
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/** tsig time 48 bits */
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LDNS_RDF_TYPE_TSIGTIME,
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/** Represents the Public Key Algorithm, HIT and Public Key fields
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for the HIP RR types. A HIP specific rdf type is used because of
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the unusual layout in wireformat (see RFC 5205 Section 5) */
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LDNS_RDF_TYPE_HIP,
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/** variable length any type rdata where the length
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is specified by the first 2 bytes */
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LDNS_RDF_TYPE_INT16_DATA,
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/** protocol and port bitmaps */
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LDNS_RDF_TYPE_SERVICE,
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/** location data */
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LDNS_RDF_TYPE_LOC,
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/** well known services */
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LDNS_RDF_TYPE_WKS,
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/** NSAP */
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LDNS_RDF_TYPE_NSAP,
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/** ATMA */
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LDNS_RDF_TYPE_ATMA,
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/** IPSECKEY */
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LDNS_RDF_TYPE_IPSECKEY,
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/** nsec3 hash salt */
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LDNS_RDF_TYPE_NSEC3_SALT,
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/** nsec3 base32 string (with length byte on wire */
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LDNS_RDF_TYPE_NSEC3_NEXT_OWNER,
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/** 4 shorts represented as 4 * 16 bit hex numbers
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* seperated by colons. For NID and L64.
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*/
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LDNS_RDF_TYPE_ILNP64,
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/** 6 * 8 bit hex numbers seperated by dashes. For EUI48. */
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LDNS_RDF_TYPE_EUI48,
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/** 8 * 8 bit hex numbers seperated by dashes. For EUI64. */
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LDNS_RDF_TYPE_EUI64,
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/** A non-zero sequence of US-ASCII letters and numbers in lower case.
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* For CAA.
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*/
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LDNS_RDF_TYPE_TAG,
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/** A <character-string> encoding of the value field as specified
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* [RFC1035], Section 5.1., encoded as remaining rdata.
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* For CAA.
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*/
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LDNS_RDF_TYPE_LONG_STR,
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/* Aliases */
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LDNS_RDF_TYPE_BITMAP = LDNS_RDF_TYPE_NSEC
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};
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typedef enum sldns_enum_rdf_type sldns_rdf_type;
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/**
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* Algorithms used in dns
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*/
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enum sldns_enum_algorithm
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{
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LDNS_RSAMD5 = 1, /* RFC 4034,4035 */
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LDNS_DH = 2,
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LDNS_DSA = 3,
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LDNS_ECC = 4,
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LDNS_RSASHA1 = 5,
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LDNS_DSA_NSEC3 = 6,
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LDNS_RSASHA1_NSEC3 = 7,
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LDNS_RSASHA256 = 8, /* RFC 5702 */
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LDNS_RSASHA512 = 10, /* RFC 5702 */
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LDNS_ECC_GOST = 12, /* RFC 5933 */
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LDNS_ECDSAP256SHA256 = 13, /* RFC 6605 */
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LDNS_ECDSAP384SHA384 = 14, /* RFC 6605 */
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LDNS_INDIRECT = 252,
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LDNS_PRIVATEDNS = 253,
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LDNS_PRIVATEOID = 254
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};
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typedef enum sldns_enum_algorithm sldns_algorithm;
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/**
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* Hashing algorithms used in the DS record
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*/
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enum sldns_enum_hash
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{
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LDNS_SHA1 = 1, /* RFC 4034 */
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LDNS_SHA256 = 2, /* RFC 4509 */
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LDNS_HASH_GOST = 3, /* RFC 5933 */
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LDNS_SHA384 = 4 /* RFC 6605 */
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};
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typedef enum sldns_enum_hash sldns_hash;
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/**
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* algorithms used in CERT rrs
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*/
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enum sldns_enum_cert_algorithm
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{
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LDNS_CERT_PKIX = 1,
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LDNS_CERT_SPKI = 2,
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LDNS_CERT_PGP = 3,
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LDNS_CERT_IPKIX = 4,
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LDNS_CERT_ISPKI = 5,
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LDNS_CERT_IPGP = 6,
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LDNS_CERT_ACPKIX = 7,
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LDNS_CERT_IACPKIX = 8,
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LDNS_CERT_URI = 253,
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LDNS_CERT_OID = 254
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};
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typedef enum sldns_enum_cert_algorithm sldns_cert_algorithm;
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/**
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* EDNS option codes
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*/
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enum sldns_enum_edns_option
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{
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LDNS_EDNS_LLQ = 1, /* http://files.dns-sd.org/draft-sekar-dns-llq.txt */
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LDNS_EDNS_UL = 2, /* http://files.dns-sd.org/draft-sekar-dns-ul.txt */
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LDNS_EDNS_NSID = 3, /* RFC5001 */
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/* 4 draft-cheshire-edns0-owner-option */
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LDNS_EDNS_DAU = 5, /* RFC6975 */
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LDNS_EDNS_DHU = 6, /* RFC6975 */
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LDNS_EDNS_N3U = 7, /* RFC6975 */
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LDNS_EDNS_CLIENT_SUBNET = 8 /* draft-vandergaast-edns-client-subnet */
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};
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typedef enum sldns_enum_edns_option sldns_edns_option;
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#define LDNS_EDNS_MASK_DO_BIT 0x8000
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/**
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* Contains all information about resource record types.
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*
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* This structure contains, for all rr types, the rdata fields that are defined.
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*/
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struct sldns_struct_rr_descriptor
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{
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/** Type of the RR that is described here */
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sldns_rr_type _type;
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/** Textual name of the RR type. */
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const char *_name;
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/** Minimum number of rdata fields in the RRs of this type. */
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uint8_t _minimum;
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/** Maximum number of rdata fields in the RRs of this type. */
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uint8_t _maximum;
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/** Wireformat specification for the rr, i.e. the types of rdata fields in their respective order. */
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const sldns_rdf_type *_wireformat;
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/** Special rdf types */
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sldns_rdf_type _variable;
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/** Specifies whether compression can be used for dnames in this RR type. */
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sldns_rr_compress _compress;
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/** The number of DNAMEs in the _wireformat string, for parsing. */
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uint8_t _dname_count;
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};
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typedef struct sldns_struct_rr_descriptor sldns_rr_descriptor;
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/**
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* returns the resource record descriptor for the given rr type.
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*
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* \param[in] type the type value of the rr type
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*\return the sldns_rr_descriptor for this type
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*/
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const sldns_rr_descriptor *sldns_rr_descript(uint16_t type);
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/**
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* returns the minimum number of rdata fields of the rr type this descriptor describes.
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*
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* \param[in] descriptor for an rr type
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* \return the minimum number of rdata fields
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*/
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size_t sldns_rr_descriptor_minimum(const sldns_rr_descriptor *descriptor);
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/**
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* returns the maximum number of rdata fields of the rr type this descriptor describes.
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*
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* \param[in] descriptor for an rr type
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* \return the maximum number of rdata fields
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*/
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size_t sldns_rr_descriptor_maximum(const sldns_rr_descriptor *descriptor);
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/**
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* returns the rdf type for the given rdata field number of the rr type for the given descriptor.
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*
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* \param[in] descriptor for an rr type
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* \param[in] field the field number
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* \return the rdf type for the field
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*/
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sldns_rdf_type sldns_rr_descriptor_field_type(const sldns_rr_descriptor *descriptor, size_t field);
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/**
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* retrieves a rrtype by looking up its name.
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* \param[in] name a string with the name
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|
* \return the type which corresponds with the name
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|
*/
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|
sldns_rr_type sldns_get_rr_type_by_name(const char *name);
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/**
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|
* retrieves a class by looking up its name.
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|
* \param[in] name string with the name
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|
* \return the cass which corresponds with the name
|
|
*/
|
|
sldns_rr_class sldns_get_rr_class_by_name(const char *name);
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|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
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|
|
|
#endif /* LDNS_RRDEF_H */
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