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                         uint8_t algorithm;
 113                         uint8_t fptype;
 114                         void *key;
 115                         size_t key_size;
 116                 } sshfp;
 117
 118                 /* http://tools.ietf.org/html/rfc4034#section-2.1 */
 119                 struct {
 120                         bool zone_key_flag:1;
 121                         bool sep_flag:1;
 122                         uint8_t algorithm;
 123                         void* key;
 124                         size_t key_size;
 125                 } dnskey;
 126
 127                 /* http://tools.ietf.org/html/rfc4034#section-3.1 */
 128                 struct {
 129                         uint16_t type_covered;
 130                         uint8_t algorithm;
 131                         uint8_t labels;
 132                         uint32_t original_ttl;
 133                         uint32_t expiration;
 134                         uint32_t inception;
 135                         uint16_t key_tag;
 136                         char *signer;
 137                         void *signature;
 138                         size_t signature_size;
 139                 } rrsig;
 140         };
 141 };
 142
 143 static inline const char* DNS_RESOURCE_KEY_NAME(const DnsResourceKey *key) {
 144         if (_unlikely_(!key))
 145                 return NULL;
 146
 147         if (key->_name)
 148                 return key->_name;
 149
 150         return (char*) key + sizeof(DnsResourceKey);
 151 }
 152
 153 DnsResourceKey* dns_resource_key_new(uint16_t class, uint16_t type, const char *name);
 154 DnsResourceKey* dns_resource_key_new_consume(uint16_t class, uint16_t type, char *name);
 155 DnsResourceKey* dns_resource_key_ref(DnsResourceKey *key);
 156 DnsResourceKey* dns_resource_key_unref(DnsResourceKey *key);
 157 int dns_resource_key_equal(const DnsResourceKey *a, const DnsResourceKey *b);
 158 int dns_resource_key_match_rr(const DnsResourceKey *key, const DnsResourceRecord *rr);
 159 int dns_resource_key_match_cname(const DnsResourceKey *key, const DnsResourceRecord *rr);
 160 int dns_resource_key_to_string(const DnsResourceKey *key, char **ret);
 161 DEFINE_TRIVIAL_CLEANUP_FUNC(DnsResourceKey*, dns_resource_key_unref);
 162
 163 DnsResourceRecord* dns_resource_record_new(DnsResourceKey *key);
 164 DnsResourceRecord* dns_resource_record_new_full(uint16_t class, uint16_t type, const char *name);
 165 DnsResourceRecord* dns_resource_record_ref(DnsResourceRecord *rr);
 166 DnsResourceRecord* dns_resource_record_unref(DnsResourceRecord *rr);
 167 int dns_resource_record_new_reverse(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *name);
 168 int dns_resource_record_equal(const DnsResourceRecord *a, const DnsResourceRecord *b);
 169 int dns_resource_record_to_string(const DnsResourceRecord *rr, char **ret);
 170 DEFINE_TRIVIAL_CLEANUP_FUNC(DnsResourceRecord*, dns_resource_record_unref);
 171
 172 const char *dns_class_to_string(uint16_t type);
 173 int dns_class_from_string(const char *name, uint16_t *class);
 174
 175 extern const struct hash_ops dns_resource_key_hash_ops;