src/resolve/resolved-dns-rr.h

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 #pragma once
   4
   5 /***
   6   This file is part of systemd.
   7
   8   Copyright 2014 Lennart Poettering
   9
  10   systemd is free software; you can redistribute it and/or modify it
  11   under the terms of the GNU Lesser General Public License as published by
  12   the Free Software Foundation; either version 2.1 of the License, or
  13   (at your option) any later version.
  14
  15   systemd is distributed in the hope that it will be useful, but
  16   WITHOUT ANY WARRANTY; without even the implied warranty of
  17   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  18   Lesser General Public License for more details.
  19
  20   You should have received a copy of the GNU Lesser General Public License
  21   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  22  ***/
  23
  24 #include <netinet/in.h>
  25
  26 #include "bitmap.h"
  27 #include "hashmap.h"
  28 #include "in-addr-util.h"
  29 #include "dns-type.h"
  30
  31 typedef struct DnsResourceKey DnsResourceKey;
  32 typedef struct DnsResourceRecord DnsResourceRecord;
  33
  34 /* DNS record classes, see RFC 1035 */
  35 enum {
  36         DNS_CLASS_IN   = 0x01,
  37         DNS_CLASS_ANY  = 0xFF,
  38         _DNS_CLASS_MAX,
  39         _DNS_CLASS_INVALID = -1
  40 };
  41
  42 struct DnsResourceKey {
  43         unsigned n_ref;
  44         uint16_t class, type;
  45         char *_name; /* don't access directy, use DNS_RESOURCE_KEY_NAME()! */
  46 };
  47
  48 struct DnsResourceRecord {
  49         unsigned n_ref;
  50         DnsResourceKey *key;
  51         uint32_t ttl;
  52         bool unparseable;
  53         union {
  54                 struct {
  55                         void *data;
  56                         size_t size;
  57                 } generic;
  58
  59                 struct {
  60                         uint16_t priority;
  61                         uint16_t weight;
  62                         uint16_t port;
  63                         char *name;
  64                 } srv;
  65
  66                 struct {
  67                         char *name;
  68                 } ptr, ns, cname, dname;
  69
  70                 struct {
  71                         char *cpu;
  72                         char *os;
  73                 } hinfo;
  74
  75                 struct {
  76                         char **strings;
  77                 } txt, spf;
  78
  79                 struct {
  80                         struct in_addr in_addr;
  81                 } a;
  82
  83                 struct {
  84                         struct in6_addr in6_addr;
  85                 } aaaa;
  86
  87                 struct {
  88                         char *mname;
  89                         char *rname;
  90                         uint32_t serial;
  91                         uint32_t refresh;
  92                         uint32_t retry;
  93                         uint32_t expire;
  94                         uint32_t minimum;
  95                 } soa;
  96
  97                 struct {
  98                         uint16_t priority;
  99                         char *exchange;
 100                 } mx;
 101
 102                 struct {
 103                         uint8_t version;
 104                         uint8_t size;
 105                         uint8_t horiz_pre;
 106                         uint8_t vert_pre;
 107                         uint32_t latitude;
 108                         uint32_t longitude;
 109                         uint32_t altitude;
 110                 } loc;
 111
 112                 struct {
 113                         uint16_t key_tag;
 114                         uint8_t algorithm;
 115                         uint8_t digest_type;
 116                         void *digest;
 117                         size_t digest_size;
 118                 } ds;
 119
 120                 /* https://tools.ietf.org/html/rfc4255#section-3.1 */
 121                 struct {
 122                         uint8_t algorithm;
 123                         uint8_t fptype;
 124                         void *fingerprint;
 125                         size_t fingerprint_size;
 126                 } sshfp;
 127
 128                 /* http://tools.ietf.org/html/rfc4034#section-2.1 */
 129                 struct {
 130                         bool zone_key_flag:1;
 131                         bool sep_flag:1;
 132                         uint8_t algorithm;
 133                         void* key;
 134                         size_t key_size;
 135                 } dnskey;
 136
 137                 /* http://tools.ietf.org/html/rfc4034#section-3.1 */
 138                 struct {
 139                         uint16_t type_covered;
 140                         uint8_t algorithm;
 141                         uint8_t labels;
 142                         uint32_t original_ttl;
 143                         uint32_t expiration;
 144                         uint32_t inception;
 145                         uint16_t key_tag;
 146                         char *signer;
 147                         void *signature;
 148                         size_t signature_size;
 149                 } rrsig;
 150
 151                 struct {
 152                         char *next_domain_name;
 153                         Bitmap *types;
 154                 } nsec;
 155
 156                 struct {
 157                         uint8_t algorithm;
 158                         uint8_t flags;
 159                         uint16_t iterations;
 160                         void *salt;
 161                         size_t salt_size;
 162                         void *next_hashed_name;
 163                         size_t next_hashed_name_size;
 164                         Bitmap *types;
 165                 } nsec3;
 166         };
 167 };
 168
 169 static inline const char* DNS_RESOURCE_KEY_NAME(const DnsResourceKey *key) {
 170         if (_unlikely_(!key))
 171                 return NULL;
 172
 173         if (key->_name)
 174                 return key->_name;
 175
 176         return (char*) key + sizeof(DnsResourceKey);
 177 }
 178
 179 DnsResourceKey* dns_resource_key_new(uint16_t class, uint16_t type, const char *name);
 180 DnsResourceKey* dns_resource_key_new_consume(uint16_t class, uint16_t type, char *name);
 181 DnsResourceKey* dns_resource_key_ref(DnsResourceKey *key);
 182 DnsResourceKey* dns_resource_key_unref(DnsResourceKey *key);
 183 int dns_resource_key_equal(const DnsResourceKey *a, const DnsResourceKey *b);
 184 int dns_resource_key_match_rr(const DnsResourceKey *key, const DnsResourceRecord *rr);
 185 int dns_resource_key_match_cname(const DnsResourceKey *key, const DnsResourceRecord *rr);
 186 int dns_resource_key_to_string(const DnsResourceKey *key, char **ret);
 187 DEFINE_TRIVIAL_CLEANUP_FUNC(DnsResourceKey*, dns_resource_key_unref);
 188
 189 DnsResourceRecord* dns_resource_record_new(DnsResourceKey *key);
 190 DnsResourceRecord* dns_resource_record_new_full(uint16_t class, uint16_t type, const char *name);
 191 DnsResourceRecord* dns_resource_record_ref(DnsResourceRecord *rr);
 192 DnsResourceRecord* dns_resource_record_unref(DnsResourceRecord *rr);
 193 int dns_resource_record_new_reverse(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *name);
 194 int dns_resource_record_equal(const DnsResourceRecord *a, const DnsResourceRecord *b);
 195 int dns_resource_record_to_string(const DnsResourceRecord *rr, char **ret);
 196 DEFINE_TRIVIAL_CLEANUP_FUNC(DnsResourceRecord*, dns_resource_record_unref);
 197
 198 const char *dns_class_to_string(uint16_t type);
 199 int dns_class_from_string(const char *name, uint16_t *class);
 200
 201 extern const struct hash_ops dns_resource_key_hash_ops;