src/resolve/dns-type.h

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 #pragma once
   3
   4 #include "macro.h"
   5
   6 /* DNS record types, taken from
   7  * http://www.iana.org/assignments/dns-parameters/dns-parameters.xhtml.
   8  */
   9 enum {
  10         /* Normal records */
  11         DNS_TYPE_A          = 0x01,
  12         DNS_TYPE_NS,
  13         DNS_TYPE_MD,
  14         DNS_TYPE_MF,
  15         DNS_TYPE_CNAME,
  16         DNS_TYPE_SOA,
  17         DNS_TYPE_MB,
  18         DNS_TYPE_MG,
  19         DNS_TYPE_MR,
  20         DNS_TYPE_NULL,
  21         DNS_TYPE_WKS,
  22         DNS_TYPE_PTR,
  23         DNS_TYPE_HINFO,
  24         DNS_TYPE_MINFO,
  25         DNS_TYPE_MX,
  26         DNS_TYPE_TXT,
  27         DNS_TYPE_RP,
  28         DNS_TYPE_AFSDB,
  29         DNS_TYPE_X25,
  30         DNS_TYPE_ISDN,
  31         DNS_TYPE_RT,
  32         DNS_TYPE_NSAP,
  33         DNS_TYPE_NSAP_PTR,
  34         DNS_TYPE_SIG,
  35         DNS_TYPE_KEY,
  36         DNS_TYPE_PX,
  37         DNS_TYPE_GPOS,
  38         DNS_TYPE_AAAA,
  39         DNS_TYPE_LOC,
  40         DNS_TYPE_NXT,
  41         DNS_TYPE_EID,
  42         DNS_TYPE_NIMLOC,
  43         DNS_TYPE_SRV,
  44         DNS_TYPE_ATMA,
  45         DNS_TYPE_NAPTR,
  46         DNS_TYPE_KX,
  47         DNS_TYPE_CERT,
  48         DNS_TYPE_A6,
  49         DNS_TYPE_DNAME,
  50         DNS_TYPE_SINK,
  51         DNS_TYPE_OPT,          /* EDNS0 option */
  52         DNS_TYPE_APL,
  53         DNS_TYPE_DS,
  54         DNS_TYPE_SSHFP,
  55         DNS_TYPE_IPSECKEY,
  56         DNS_TYPE_RRSIG,
  57         DNS_TYPE_NSEC,
  58         DNS_TYPE_DNSKEY,
  59         DNS_TYPE_DHCID,
  60         DNS_TYPE_NSEC3,
  61         DNS_TYPE_NSEC3PARAM,
  62         DNS_TYPE_TLSA,
  63
  64         DNS_TYPE_HIP        = 0x37,
  65         DNS_TYPE_NINFO,
  66         DNS_TYPE_RKEY,
  67         DNS_TYPE_TALINK,
  68         DNS_TYPE_CDS,
  69         DNS_TYPE_CDNSKEY,
  70         DNS_TYPE_OPENPGPKEY,
  71
  72         DNS_TYPE_SPF        = 0x63,
  73         DNS_TYPE_NID,
  74         DNS_TYPE_L32,
  75         DNS_TYPE_L64,
  76         DNS_TYPE_LP,
  77         DNS_TYPE_EUI48,
  78         DNS_TYPE_EUI64,
  79
  80         DNS_TYPE_TKEY       = 0xF9,
  81         DNS_TYPE_TSIG,
  82         DNS_TYPE_IXFR,
  83         DNS_TYPE_AXFR,
  84         DNS_TYPE_MAILB,
  85         DNS_TYPE_MAILA,
  86         DNS_TYPE_ANY,
  87         DNS_TYPE_URI,
  88         DNS_TYPE_CAA,
  89         DNS_TYPE_TA         = 0x8000,
  90         DNS_TYPE_DLV,
  91
  92         _DNS_TYPE_MAX,
  93         _DNS_TYPE_INVALID = -1
  94 };
  95
  96 assert_cc(DNS_TYPE_SSHFP == 44);
  97 assert_cc(DNS_TYPE_TLSA == 52);
  98 assert_cc(DNS_TYPE_ANY == 255);
  99
 100 /* DNS record classes, see RFC 1035 */
 101 enum {
 102         DNS_CLASS_IN   = 0x01,
 103         DNS_CLASS_ANY  = 0xFF,
 104
 105         _DNS_CLASS_MAX,
 106         _DNS_CLASS_INVALID = -1
 107 };
 108
 109 #define _DNS_CLASS_STRING_MAX (sizeof "CLASS" + DECIMAL_STR_MAX(uint16_t))
 110 #define _DNS_TYPE_STRING_MAX (sizeof "CLASS" + DECIMAL_STR_MAX(uint16_t))
 111
 112 bool dns_type_is_pseudo(uint16_t type);
 113 bool dns_type_is_valid_query(uint16_t type);
 114 bool dns_type_is_valid_rr(uint16_t type);
 115 bool dns_type_may_redirect(uint16_t type);
 116 bool dns_type_is_dnssec(uint16_t type);
 117 bool dns_type_is_obsolete(uint16_t type);
 118 bool dns_type_may_wildcard(uint16_t type);
 119 bool dns_type_apex_only(uint16_t type);
 120 bool dns_type_needs_authentication(uint16_t type);
 121 bool dns_type_is_zone_transer(uint16_t type);
 122 int dns_type_to_af(uint16_t type);
 123
 124 bool dns_class_is_pseudo(uint16_t class);
 125 bool dns_class_is_valid_rr(uint16_t class);
 126
 127 /* TYPE?? follows http://tools.ietf.org/html/rfc3597#section-5 */
 128 const char *dns_type_to_string(int type);
 129 int dns_type_from_string(const char *s);
 130
 131 const char *dns_class_to_string(uint16_t class);
 132 int dns_class_from_string(const char *name);
 133
 134 /* https://tools.ietf.org/html/draft-ietf-dane-protocol-23#section-7.2 */
 135 const char *tlsa_cert_usage_to_string(uint8_t cert_usage);
 136
 137 /* https://tools.ietf.org/html/draft-ietf-dane-protocol-23#section-7.3 */
 138 const char *tlsa_selector_to_string(uint8_t selector);
 139
 140 /* https://tools.ietf.org/html/draft-ietf-dane-protocol-23#section-7.4 */
 141 const char *tlsa_matching_type_to_string(uint8_t selector);
 142
 143 /* https://tools.ietf.org/html/rfc6844#section-5.1 */
 144 #define CAA_FLAG_CRITICAL (1u << 7)