resolved-dns-server.c revision 4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering/***
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering This file is part of systemd.
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering Copyright 2014 Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering systemd is free software; you can redistribute it and/or modify it
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering under the terms of the GNU Lesser General Public License as published by
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering the Free Software Foundation; either version 2.1 of the License, or
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering (at your option) any later version.
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering systemd is distributed in the hope that it will be useful, but
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering WITHOUT ANY WARRANTY; without even the implied warranty of
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering Lesser General Public License for more details.
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering You should have received a copy of the GNU Lesser General Public License
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering along with systemd; If not, see <http://www.gnu.org/licenses/>.
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering***/
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include "resolved-dns-server.h"
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringint dns_server_new(
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering Manager *m,
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering DnsServer **ret,
4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering DnsServerType type,
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering Link *l,
0dd25fb9f005d8ab7ac4bc10a609d00569f8c56aLennart Poettering int family,
3c0cf502796be355431d4a64d738e75f543aa51dLennart Poettering const union in_addr_union *in_addr) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering DnsServer *s, *tail;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering assert(m);
4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering assert((type == DNS_SERVER_LINK) == !!l);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering assert(in_addr);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering s = new0(DnsServer, 1);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (!s)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return -ENOMEM;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering s->type = type;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering s->family = family;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering s->address = *in_addr;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering if (type == DNS_SERVER_LINK) {
6073b6f26ab9fc6bf335faa7073ec443eef093fdTom Gundersen LIST_FIND_TAIL(servers, l->dns_servers, tail);
6073b6f26ab9fc6bf335faa7073ec443eef093fdTom Gundersen LIST_INSERT_AFTER(servers, l->dns_servers, tail, s);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering s->link = l;
4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering } else if (type == DNS_SERVER_SYSTEM) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering LIST_FIND_TAIL(servers, m->dns_servers, tail);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering LIST_INSERT_AFTER(servers, m->dns_servers, tail, s);
4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering } else if (type == DNS_SERVER_FALLBACK) {
4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering LIST_FIND_TAIL(servers, m->fallback_dns_servers, tail);
4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering LIST_INSERT_AFTER(servers, m->fallback_dns_servers, tail, s);
4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering } else
4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering assert_not_reached("Unknown server type");
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering s->manager = m;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering /* A new DNS server that isn't fallback is added and the one
4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering * we used so far was a fallback one? Then let's try to pick
4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering * the new one */
4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering if (type != DNS_SERVER_FALLBACK &&
4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering s->manager->current_dns_server &&
4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering s->manager->current_dns_server->type == DNS_SERVER_FALLBACK)
4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering s->manager->current_dns_server = NULL;
4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (ret)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering *ret = s;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return 0;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart PoetteringDnsServer* dns_server_free(DnsServer *s) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (!s)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return NULL;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
2f82f5eae471a23a7aa9f40f19079a4b63e19496Lennart Poettering if (s->manager) {
4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering if (s->type == DNS_SERVER_LINK)
6073b6f26ab9fc6bf335faa7073ec443eef093fdTom Gundersen LIST_REMOVE(servers, s->link->dns_servers, s);
4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering else if (s->type == DNS_SERVER_SYSTEM)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering LIST_REMOVE(servers, s->manager->dns_servers, s);
4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering else if (s->type == DNS_SERVER_FALLBACK)
4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering LIST_REMOVE(servers, s->manager->fallback_dns_servers, s);
4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering else
4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering assert_not_reached("Unknown server type");
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (s->link && s->link->current_dns_server == s)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering s->link->current_dns_server = NULL;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (s->manager && s->manager->current_dns_server == s)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering s->manager->current_dns_server = NULL;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering free(s);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return NULL;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}