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                         uint16_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                 struct {
 121                         uint8_t algorithm;
 122                         uint8_t fptype;
 123                         void *key;
 124                         size_t key_size;
 125                 } sshfp;
 126
 127                 /* http://tools.ietf.org/html/rfc4034#section-2.1 */
 128                 struct {
 129                         bool zone_key_flag:1;
 130                         bool sep_flag:1;
 131                         uint8_t algorithm;
 132                         void* key;
 133                         size_t key_size;
 134                 } dnskey;
 135
 136                 /* http://tools.ietf.org/html/rfc4034#section-3.1 */
 137                 struct {
 138                         uint16_t type_covered;
 139                         uint8_t algorithm;
 140                         uint8_t labels;
 141                         uint32_t original_ttl;
 142                         uint32_t expiration;
 143                         uint32_t inception;
 144                         uint16_t key_tag;
 145                         char *signer;
 146                         void *signature;
 147                         size_t signature_size;
 148                 } rrsig;
 149
 150                 struct {
 151                         char *next_domain_name;
 152                         Bitmap *types;
 153                 } nsec;
 154
 155                 struct {
 156                         uint8_t algorithm;
 157                         uint8_t flags;
 158                         uint16_t iterations;
 159                         void *salt;
 160                         size_t salt_size;
 161                         void *next_hashed_name;
 162                         size_t next_hashed_name_size;
 163                         Bitmap *types;
 164                 } nsec3;
 165         };
 166 };
 167
 168 static inline const char* DNS_RESOURCE_KEY_NAME(const DnsResourceKey *key) {
 169         if (_unlikely_(!key))
 170                 return NULL;
 171
 172         if (key->_name)
 173                 return key->_name;
 174
 175         return (char*) key + sizeof(DnsResourceKey);
 176 }
 177
 178 DnsResourceKey* dns_resource_key_new(uint16_t class, uint16_t type, const char *name);
 179 DnsResourceKey* dns_resource_key_new_consume(uint16_t class, uint16_t type, char *name);
 180 DnsResourceKey* dns_resource_key_ref(DnsResourceKey *key);
 181 DnsResourceKey* dns_resource_key_unref(DnsResourceKey *key);
 182 int dns_resource_key_equal(const DnsResourceKey *a, const DnsResourceKey *b);
 183 int dns_resource_key_match_rr(const DnsResourceKey *key, const DnsResourceRecord *rr);
 184 int dns_resource_key_match_cname(const DnsResourceKey *key, const DnsResourceRecord *rr);
 185 int dns_resource_key_to_string(const DnsResourceKey *key, char **ret);
 186 DEFINE_TRIVIAL_CLEANUP_FUNC(DnsResourceKey*, dns_resource_key_unref);
 187
 188 DnsResourceRecord* dns_resource_record_new(DnsResourceKey *key);
 189 DnsResourceRecord* dns_resource_record_new_full(uint16_t class, uint16_t type, const char *name);
 190 DnsResourceRecord* dns_resource_record_ref(DnsResourceRecord *rr);
 191 DnsResourceRecord* dns_resource_record_unref(DnsResourceRecord *rr);
 192 int dns_resource_record_new_reverse(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *name);
 193 int dns_resource_record_equal(const DnsResourceRecord *a, const DnsResourceRecord *b);
 194 int dns_resource_record_to_string(const DnsResourceRecord *rr, char **ret);
 195 DEFINE_TRIVIAL_CLEANUP_FUNC(DnsResourceRecord*, dns_resource_record_unref);
 196
 197 const char *dns_class_to_string(uint16_t type);
 198 int dns_class_from_string(const char *name, uint16_t *class);
 199
 200 extern const struct hash_ops dns_resource_key_hash_ops;