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 "hashmap.h"
  27 #include "in-addr-util.h"
  28 #include "dns-type.h"
  29
  30 typedef struct DnsResourceKey DnsResourceKey;
  31 typedef struct DnsResourceRecord DnsResourceRecord;
  32
  33 /* DNS record classes, see RFC 1035 */
  34 enum {
  35         DNS_CLASS_IN   = 0x01,
  36         DNS_CLASS_ANY  = 0xFF,
  37         _DNS_CLASS_MAX,
  38         _DNS_CLASS_INVALID = -1
  39 };
  40
  41 struct DnsResourceKey {
  42         unsigned n_ref;
  43         uint16_t class, type;
  44         char *_name; /* don't access directy, use DNS_RESOURCE_KEY_NAME()! */
  45 };
  46
  47 struct DnsResourceRecord {
  48         unsigned n_ref;
  49         DnsResourceKey *key;
  50         uint32_t ttl;
  51         bool unparseable;
  52         union {
  53                 struct {
  54                         void *data;
  55                         uint16_t size;
  56                 } generic;
  57
  58                 struct {
  59                         uint16_t priority;
  60                         uint16_t weight;
  61                         uint16_t port;
  62                         char *name;
  63                 } srv;
  64
  65                 struct {
  66                         char *name;
  67                 } ptr, ns, cname, dname;
  68
  69                 struct {
  70                         char *cpu;
  71                         char *os;
  72                 } hinfo;
  73
  74                 struct {
  75                         char **strings;
  76                 } txt, spf;
  77
  78                 struct {
  79                         struct in_addr in_addr;
  80                 } a;
  81
  82                 struct {
  83                         struct in6_addr in6_addr;
  84                 } aaaa;
  85
  86                 struct {
  87                         char *mname;
  88                         char *rname;
  89                         uint32_t serial;
  90                         uint32_t refresh;
  91                         uint32_t retry;
  92                         uint32_t expire;
  93                         uint32_t minimum;
  94                 } soa;
  95
  96                 struct {
  97                         uint16_t priority;
  98                         char *exchange;
  99                 } mx;
 100
 101                 struct {
 102                         uint8_t version;
 103                         uint8_t size;
 104                         uint8_t horiz_pre;
 105                         uint8_t vert_pre;
 106                         uint32_t latitude;
 107                         uint32_t longitude;
 108                         uint32_t altitude;
 109                 } loc;
 110
 111                 struct {
 112                         uint16_t key_tag;
 113                         uint8_t algorithm;
 114                         uint8_t digest_type;
 115                         void *digest;
 116                         size_t digest_size;
 117                 } ds;
 118
 119                 struct {
 120                         uint8_t algorithm;
 121                         uint8_t fptype;
 122                         void *key;
 123                         size_t key_size;
 124                 } sshfp;
 125
 126                 /* http://tools.ietf.org/html/rfc4034#section-2.1 */
 127                 struct {
 128                         bool zone_key_flag:1;
 129                         bool sep_flag:1;
 130                         uint8_t algorithm;
 131                         void* key;
 132                         size_t key_size;
 133                 } dnskey;
 134
 135                 /* http://tools.ietf.org/html/rfc4034#section-3.1 */
 136                 struct {
 137                         uint16_t type_covered;
 138                         uint8_t algorithm;
 139                         uint8_t labels;
 140                         uint32_t original_ttl;
 141                         uint32_t expiration;
 142                         uint32_t inception;
 143                         uint16_t key_tag;
 144                         char *signer;
 145                         void *signature;
 146                         size_t signature_size;
 147                 } rrsig;
 148         };
 149 };
 150
 151 static inline const char* DNS_RESOURCE_KEY_NAME(const DnsResourceKey *key) {
 152         if (_unlikely_(!key))
 153                 return NULL;
 154
 155         if (key->_name)
 156                 return key->_name;
 157
 158         return (char*) key + sizeof(DnsResourceKey);
 159 }
 160
 161 DnsResourceKey* dns_resource_key_new(uint16_t class, uint16_t type, const char *name);
 162 DnsResourceKey* dns_resource_key_new_consume(uint16_t class, uint16_t type, char *name);
 163 DnsResourceKey* dns_resource_key_ref(DnsResourceKey *key);
 164 DnsResourceKey* dns_resource_key_unref(DnsResourceKey *key);
 165 int dns_resource_key_equal(const DnsResourceKey *a, const DnsResourceKey *b);
 166 int dns_resource_key_match_rr(const DnsResourceKey *key, const DnsResourceRecord *rr);
 167 int dns_resource_key_match_cname(const DnsResourceKey *key, const DnsResourceRecord *rr);
 168 int dns_resource_key_to_string(const DnsResourceKey *key, char **ret);
 169 DEFINE_TRIVIAL_CLEANUP_FUNC(DnsResourceKey*, dns_resource_key_unref);
 170
 171 DnsResourceRecord* dns_resource_record_new(DnsResourceKey *key);
 172 DnsResourceRecord* dns_resource_record_new_full(uint16_t class, uint16_t type, const char *name);
 173 DnsResourceRecord* dns_resource_record_ref(DnsResourceRecord *rr);
 174 DnsResourceRecord* dns_resource_record_unref(DnsResourceRecord *rr);
 175 int dns_resource_record_new_reverse(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *name);
 176 int dns_resource_record_equal(const DnsResourceRecord *a, const DnsResourceRecord *b);
 177 int dns_resource_record_to_string(const DnsResourceRecord *rr, char **ret);
 178 DEFINE_TRIVIAL_CLEANUP_FUNC(DnsResourceRecord*, dns_resource_record_unref);
 179
 180 const char *dns_class_to_string(uint16_t type);
 181 int dns_class_from_string(const char *name, uint16_t *class);
 182
 183 extern const struct hash_ops dns_resource_key_hash_ops;