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-answer.h"
23 #include "resolved-dns-domain.h"
25 DnsAnswer *dns_answer_new(unsigned n) {
30 a = malloc0(offsetof(DnsAnswer, rrs) + sizeof(DnsResourceRecord*) * n);
40 DnsAnswer *dns_answer_ref(DnsAnswer *a) {
49 DnsAnswer *dns_answer_unref(DnsAnswer *a) {
58 for (i = 0; i < a->n_rrs; i++)
59 dns_resource_record_unref(a->rrs[i]);
68 int dns_answer_add(DnsAnswer *a, DnsResourceRecord *rr) {
75 for (i = 0; i < a->n_rrs; i++) {
76 r = dns_resource_record_equal(a->rrs[i], rr);
80 /* Entry already exists, keep the entry with
81 * the higher RR, or the one with TTL 0 */
83 if (rr->ttl == 0 || (rr->ttl > a->rrs[i]->ttl && a->rrs[i]->ttl != 0)) {
84 dns_resource_record_ref(rr);
85 dns_resource_record_unref(a->rrs[i]);
93 if (a->n_rrs >= a->n_allocated)
96 a->rrs[a->n_rrs++] = dns_resource_record_ref(rr);
100 int dns_answer_contains(DnsAnswer *a, DnsResourceKey *key) {
107 for (i = 0; i < a->n_rrs; i++) {
108 r = dns_resource_key_match_rr(key, a->rrs[i]);
118 int dns_answer_find_soa(DnsAnswer *a, DnsResourceKey *key, DnsResourceRecord **ret) {
125 for (i = 0; i < a->n_rrs; i++) {
127 if (a->rrs[i]->key->class != DNS_CLASS_IN)
130 if (a->rrs[i]->key->type != DNS_TYPE_SOA)
133 if (dns_name_endswith(DNS_RESOURCE_KEY_NAME(key), DNS_RESOURCE_KEY_NAME(a->rrs[i]->key))) {
142 DnsAnswer *dns_answer_merge(DnsAnswer *a, DnsAnswer *b) {
143 _cleanup_(dns_answer_unrefp) DnsAnswer *ret = NULL;
148 if (a && (!b || b->n_rrs <= 0))
149 return dns_answer_ref(a);
150 if ((!a || a->n_rrs <= 0) && b)
151 return dns_answer_ref(b);
153 ret = dns_answer_new((a ? a->n_rrs : 0) + (b ? b->n_rrs : 0));
158 for (i = 0; i < a->n_rrs; i++) {
159 r = dns_answer_add(ret, a->rrs[i]);
166 for (i = 0; i < b->n_rrs; i++) {
167 r = dns_answer_add(ret, b->rrs[i]);