src/resolve/resolved-link.c

	resolved-link.c revision 74b2466e14a1961bf3ac0e8a60cfaceec705bd59
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 <net/if.h>
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include "sd-network.h"
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include "dhcp-lease-internal.h"
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include "strv.h"
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include "resolved-link.h"
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringint link_new(Manager *m, Link **ret, int ifindex) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        _cleanup_(link_freep) Link *l = NULL;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        int r;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        assert(m);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        assert(ifindex > 0);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        r = hashmap_ensure_allocated(&m->links, NULL, NULL);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (r < 0)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                return r;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        l = new0(Link, 1);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (!l)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                return -ENOMEM;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        l->ifindex = ifindex;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        r = hashmap_put(m->links, INT_TO_PTR(ifindex), l);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (r < 0)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                return r;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        l->manager = m;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (ret)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                *ret = l;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        l = NULL;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        return 0;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart PoetteringLink *link_free(Link *l) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (!l)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                return NULL;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        while (l->addresses)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                link_address_free(l->addresses);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (l->manager)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                hashmap_remove(l->manager->links, INT_TO_PTR(l->ifindex));
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        dns_scope_free(l->unicast_scope);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        dns_scope_free(l->mdns_ipv4_scope);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        dns_scope_free(l->mdns_ipv6_scope);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        while (l->dhcp_dns_servers)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                dns_server_free(l->dhcp_dns_servers);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        while (l->link_dns_servers)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                dns_server_free(l->link_dns_servers);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        free(l);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        return NULL;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringint link_update_rtnl(Link *l, sd_rtnl_message *m) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        int r;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        assert(l);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        assert(m);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        r = sd_rtnl_message_link_get_flags(m, &l->flags);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (r < 0)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                return r;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        return 0;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringstatic int update_dhcp_dns_servers(Link *l) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        _cleanup_dhcp_lease_unref_ sd_dhcp_lease *lease = NULL;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        _cleanup_free_ struct in_addr *nameservers = NULL;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        DnsServer *s, *nx;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        unsigned i;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        size_t n;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        int r;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        assert(l);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        r = sd_network_dhcp_use_dns(l->ifindex);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (r <= 0)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                goto clear;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        r = sd_network_get_dhcp_lease(l->ifindex, &lease);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (r < 0)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                goto clear;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        LIST_FOREACH(servers, s, l->dhcp_dns_servers)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                s->marked = true;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        r = sd_dhcp_lease_get_dns(lease, &nameservers, &n);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (r < 0)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                goto clear;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        for (i = 0; i < n; i++) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                union in_addr_union a = { .in = nameservers[i] };
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                s = link_find_dns_server(l, DNS_SERVER_DHCP, AF_INET, &a);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                if (s)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        s->marked = false;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                else {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        r = dns_server_new(l->manager, NULL, DNS_SERVER_DHCP, l, AF_INET, &a);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        if (r < 0)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                                goto clear;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        LIST_FOREACH_SAFE(servers, s, nx, l->dhcp_dns_servers)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                if (s->marked)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        dns_server_free(s);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        return 0;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringclear:
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        while (l->dhcp_dns_servers)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                dns_server_free(l->dhcp_dns_servers);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        return r;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringstatic int update_link_dns_servers(Link *l) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        _cleanup_free_ struct in_addr *nameservers = NULL;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        _cleanup_free_ struct in6_addr *nameservers6 = NULL;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        DnsServer *s, *nx;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        unsigned i;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        size_t n;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        int r;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        assert(l);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        LIST_FOREACH(servers, s, l->link_dns_servers)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                s->marked = true;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        r = sd_network_get_dns(l->ifindex, &nameservers, &n);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (r < 0)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                goto clear;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        for (i = 0; i < n; i++) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                union in_addr_union a = { .in = nameservers[i] };
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                s = link_find_dns_server(l, DNS_SERVER_LINK, AF_INET, &a);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                if (s)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        s->marked = false;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                else {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        r = dns_server_new(l->manager, NULL, DNS_SERVER_LINK, l, AF_INET, &a);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        if (r < 0)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                                goto clear;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        r = sd_network_get_dns6(l->ifindex, &nameservers6, &n);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (r < 0)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                goto clear;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        for (i = 0; i < n; i++) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                union in_addr_union a = { .in6 = nameservers6[i] };
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                s = link_find_dns_server(l, DNS_SERVER_LINK, AF_INET6, &a);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                if (s)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        s->marked = false;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                else {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        r = dns_server_new(l->manager, NULL, DNS_SERVER_LINK, l, AF_INET6, &a);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        if (r < 0)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                                goto clear;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        LIST_FOREACH_SAFE(servers, s, nx, l->link_dns_servers)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                if (s->marked)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        dns_server_free(s);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        return 0;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringclear:
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        while (l->link_dns_servers)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                dns_server_free(l->link_dns_servers);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        return r;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringint link_update_monitor(Link *l) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        assert(l);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        free(l->operational_state);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        l->operational_state = NULL;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        sd_network_get_link_operational_state(l->ifindex, &l->operational_state);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        update_dhcp_dns_servers(l);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        update_link_dns_servers(l);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        return 0;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringbool link_relevant(Link *l) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        LinkAddress *a;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        assert(l);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        /* A link is relevant if it isn't a loopback device and has at
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering         * least one relevant IP address */
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (l->flags & IFF_LOOPBACK)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                return false;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (l->operational_state && !STR_IN_SET(l->operational_state, "unknown", "degraded", "routable"))
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                return false;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        LIST_FOREACH(addresses, a, l->addresses)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                if (link_address_relevant(a))
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        return true;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        return false;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart PoetteringLinkAddress *link_find_address(Link *l, unsigned char family, union in_addr_union *in_addr) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        LinkAddress *a;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        assert(l);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        LIST_FOREACH(addresses, a, l->addresses) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                if (a->family == family &&
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                    in_addr_equal(family, &a->in_addr, in_addr))
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        return a;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        return NULL;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart PoetteringDnsServer* link_find_dns_server(Link *l, DnsServerSource source, unsigned char family, union in_addr_union *in_addr) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        DnsServer *first, *s;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        assert(l);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        first = source == DNS_SERVER_DHCP ? l->dhcp_dns_servers : l->link_dns_servers;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        LIST_FOREACH(servers, s, first) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                if (s->family == family &&
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                    in_addr_equal(family, &s->address, in_addr))
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        return s;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        return NULL;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart PoetteringDnsServer *link_get_dns_server(Link *l) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        assert(l);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (!l->current_dns_server)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                l->current_dns_server = l->link_dns_servers;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (!l->current_dns_server)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                l->current_dns_server = l->dhcp_dns_servers;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        return l->current_dns_server;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringvoid link_next_dns_server(Link *l) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        assert(l);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        /* Switch to the next DNS server */
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (!l->current_dns_server) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                l->current_dns_server = l->link_dns_servers;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                if (l->current_dns_server)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        return;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (!l->current_dns_server) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                l->current_dns_server = l->dhcp_dns_servers;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                if (l->current_dns_server)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        return;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (!l->current_dns_server)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                return;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (l->current_dns_server->servers_next) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                l->current_dns_server = l->current_dns_server->servers_next;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                return;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (l->current_dns_server->source == DNS_SERVER_LINK)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                l->current_dns_server = l->dhcp_dns_servers;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        else {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                assert(l->current_dns_server->source == DNS_SERVER_DHCP);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                l->current_dns_server = l->link_dns_servers;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringint link_address_new(Link *l, LinkAddress **ret, unsigned char family, union in_addr_union *in_addr) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        LinkAddress *a;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        assert(l);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        assert(in_addr);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        a = new0(LinkAddress, 1);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (!a)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                return -ENOMEM;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        a->family = family;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        a->in_addr = *in_addr;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        a->link = l;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        LIST_PREPEND(addresses, l->addresses, a);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (ret)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                *ret = a;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        return 0;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart PoetteringLinkAddress *link_address_free(LinkAddress *a) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (!a)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                return NULL;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (a->link)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                LIST_REMOVE(addresses, a->link->addresses, a);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        free(a);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        return NULL;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringint link_address_update_rtnl(LinkAddress *a, sd_rtnl_message *m) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        int r;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        assert(a);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        assert(m);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        r = sd_rtnl_message_addr_get_flags(m, &a->flags);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (r < 0)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                return r;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        r = sd_rtnl_message_addr_get_scope(m, &a->scope);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (r < 0)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                return r;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        return 0;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringbool link_address_relevant(LinkAddress *a) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        assert(a);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (a->flags & IFA_F_DEPRECATED)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                return false;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (IN_SET(a->scope, RT_SCOPE_HOST, RT_SCOPE_NOWHERE))
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                return false;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        return true;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}