1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2014 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
22 #include "resolved-dns-domain.h"
23 #include "resolved-dns-rr.h"
25 DnsResourceKey* dns_resource_key_new(uint16_t class, uint16_t type, const char *name) {
32 k = malloc0(sizeof(DnsResourceKey) + l + 1);
40 strcpy((char*) k + sizeof(DnsResourceKey), name);
45 DnsResourceKey* dns_resource_key_new_consume(uint16_t class, uint16_t type, char *name) {
50 k = new0(DnsResourceKey, 1);
62 DnsResourceKey* dns_resource_key_ref(DnsResourceKey *k) {
73 DnsResourceKey* dns_resource_key_unref(DnsResourceKey *k) {
88 int dns_resource_key_equal(const DnsResourceKey *a, const DnsResourceKey *b) {
91 r = dns_name_equal(DNS_RESOURCE_KEY_NAME(a), DNS_RESOURCE_KEY_NAME(b));
95 if (a->class != b->class)
98 if (a->type != b->type)
104 int dns_resource_key_match_rr(const DnsResourceKey *key, const DnsResourceRecord *rr) {
108 if (rr->key->class != key->class && key->class != DNS_CLASS_ANY)
111 if (rr->key->type != key->type && key->type != DNS_TYPE_ANY)
114 return dns_name_equal(DNS_RESOURCE_KEY_NAME(rr->key), DNS_RESOURCE_KEY_NAME(key));
117 int dns_resource_key_match_cname(const DnsResourceKey *key, const DnsResourceRecord *rr) {
121 if (rr->key->class != key->class && key->class != DNS_CLASS_ANY)
124 if (rr->key->type != DNS_TYPE_CNAME)
127 return dns_name_equal(DNS_RESOURCE_KEY_NAME(rr->key), DNS_RESOURCE_KEY_NAME(key));
130 unsigned long dns_resource_key_hash_func(const void *i, const uint8_t hash_key[HASH_KEY_SIZE]) {
131 const DnsResourceKey *k = i;
134 ul = dns_name_hash_func(DNS_RESOURCE_KEY_NAME(k), hash_key);
135 ul = ul * hash_key[0] + ul + k->class;
136 ul = ul * hash_key[1] + ul + k->type;
141 int dns_resource_key_compare_func(const void *a, const void *b) {
142 const DnsResourceKey *x = a, *y = b;
145 ret = dns_name_compare_func(DNS_RESOURCE_KEY_NAME(x), DNS_RESOURCE_KEY_NAME(y));
149 if (x->type < y->type)
151 if (x->type > y->type)
154 if (x->class < y->class)
156 if (x->class > y->class)
162 DnsResourceRecord* dns_resource_record_new(DnsResourceKey *key) {
163 DnsResourceRecord *rr;
165 rr = new0(DnsResourceRecord, 1);
170 rr->key = dns_resource_key_ref(key);
175 DnsResourceRecord* dns_resource_record_ref(DnsResourceRecord *rr) {
179 assert(rr->n_ref > 0);
185 DnsResourceRecord* dns_resource_record_unref(DnsResourceRecord *rr) {
189 assert(rr->n_ref > 0);
197 if (IN_SET(rr->key->type, DNS_TYPE_PTR, DNS_TYPE_NS, DNS_TYPE_CNAME))
199 else if (rr->key->type == DNS_TYPE_HINFO) {
202 } else if (rr->key->type == DNS_TYPE_SOA) {
205 } else if (!IN_SET(rr->key->type, DNS_TYPE_A, DNS_TYPE_AAAA))
206 free(rr->generic.data);
208 dns_resource_key_unref(rr->key);
216 int dns_resource_record_new_reverse(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *hostname) {
217 _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL;
218 _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *rr = NULL;
219 _cleanup_free_ char *ptr = NULL;
226 r = dns_name_reverse(family, address, &ptr);
230 key = dns_resource_key_new_consume(DNS_CLASS_IN, DNS_TYPE_PTR, ptr);
236 rr = dns_resource_record_new(key);
240 rr->ptr.name = strdup(hostname);
250 int dns_resource_record_equal(const DnsResourceRecord *a, const DnsResourceRecord *b) {
256 r = dns_resource_key_equal(a->key, b->key);
260 if (IN_SET(a->key->type, DNS_TYPE_PTR, DNS_TYPE_NS, DNS_TYPE_CNAME))
261 return dns_name_equal(a->ptr.name, b->ptr.name);
262 else if (a->key->type == DNS_TYPE_HINFO)
263 return strcasecmp(a->hinfo.cpu, b->hinfo.cpu) == 0 &&
264 strcasecmp(a->hinfo.os, b->hinfo.os) == 0;
265 else if (a->key->type == DNS_TYPE_A)
266 return memcmp(&a->a.in_addr, &b->a.in_addr, sizeof(struct in_addr)) == 0;
267 else if (a->key->type == DNS_TYPE_AAAA)
268 return memcmp(&a->aaaa.in6_addr, &b->aaaa.in6_addr, sizeof(struct in6_addr)) == 0;
269 else if (a->key->type == DNS_TYPE_SOA) {
270 r = dns_name_equal(a->soa.mname, b->soa.mname);
273 r = dns_name_equal(a->soa.rname, b->soa.rname);
277 return a->soa.serial == b->soa.serial &&
278 a->soa.refresh == b->soa.refresh &&
279 a->soa.retry == b->soa.retry &&
280 a->soa.expire == b->soa.expire &&
281 a->soa.minimum == b->soa.minimum;
283 return a->generic.size == b->generic.size &&
284 memcmp(a->generic.data, b->generic.data, a->generic.size) == 0;
287 const char *dns_class_to_string(uint16_t class) {
301 const char *dns_type_to_string(uint16_t type) {