2013-10-17 03:18:36 +02:00
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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2013 Tom Gundersen <teg@jklm.no>
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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2014-01-05 23:01:10 +01:00
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#include <resolv.h>
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2013-10-17 03:18:36 +02:00
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#include "path-util.h"
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#include "networkd.h"
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#include "libudev-private.h"
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2013-12-13 03:30:42 +01:00
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#include "udev-util.h"
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2014-01-29 21:24:44 +01:00
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#include "rtnl-util.h"
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2014-01-05 23:01:10 +01:00
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#include "mkdir.h"
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2014-02-12 16:40:24 +01:00
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#include "virt.h"
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2013-10-17 03:18:36 +02:00
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2014-04-15 14:21:44 +02:00
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#include "sd-rtnl.h"
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2014-01-08 23:41:41 +01:00
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const char* const network_dirs[] = {
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"/etc/systemd/network",
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"/run/systemd/network",
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"/usr/lib/systemd/network",
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2014-03-14 18:19:29 +01:00
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#ifdef HAVE_SPLIT_USR
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2014-01-08 23:41:41 +01:00
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"/lib/systemd/network",
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#endif
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NULL};
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2014-02-22 20:19:49 +01:00
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static int dispatch_sigterm(sd_event_source *es, const struct signalfd_siginfo *si, void *userdata) {
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Manager *m = userdata;
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assert(m);
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log_received_signal(LOG_INFO, si);
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sd_event_exit(m->event, 0);
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return 0;
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}
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static int setup_signals(Manager *m) {
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sigset_t mask;
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int r;
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assert(m);
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assert_se(sigemptyset(&mask) == 0);
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sigset_add_many(&mask, SIGINT, SIGTERM, -1);
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assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0);
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r = sd_event_add_signal(m->event, &m->sigterm_event_source, SIGTERM, dispatch_sigterm, m);
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if (r < 0)
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return r;
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r = sd_event_add_signal(m->event, &m->sigint_event_source, SIGINT, dispatch_sigterm, m);
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if (r < 0)
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return r;
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return 0;
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}
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2013-10-17 03:18:36 +02:00
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int manager_new(Manager **ret) {
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_cleanup_manager_free_ Manager *m = NULL;
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int r;
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m = new0(Manager, 1);
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if (!m)
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return -ENOMEM;
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2013-11-11 19:34:13 +01:00
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r = sd_event_default(&m->event);
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2013-10-17 03:18:36 +02:00
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if (r < 0)
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return r;
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2013-12-11 18:14:52 +01:00
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sd_event_set_watchdog(m->event, true);
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2014-02-19 23:54:58 +01:00
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r = sd_rtnl_open(&m->rtnl, RTMGRP_LINK | RTMGRP_IPV4_IFADDR);
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2013-10-17 03:18:36 +02:00
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if (r < 0)
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return r;
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2014-01-13 23:48:28 +01:00
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r = sd_bus_default_system(&m->bus);
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2014-01-18 01:37:35 +01:00
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if (r < 0 && r != -ENOENT) /* TODO: drop when we can rely on kdbus */
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2014-01-13 23:48:28 +01:00
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return r;
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2014-02-22 20:19:49 +01:00
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r = setup_signals(m);
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if (r < 0)
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return r;
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2014-02-12 16:40:24 +01:00
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/* udev does not initialize devices inside containers,
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* so we rely on them being already initialized before
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* entering the container */
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2014-04-15 14:21:44 +02:00
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if (detect_container(NULL) <= 0) {
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m->udev = udev_new();
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if (!m->udev)
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2014-02-12 16:40:24 +01:00
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return -ENOMEM;
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2014-04-15 14:21:44 +02:00
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2014-02-12 16:40:24 +01:00
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m->udev_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
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if (!m->udev_monitor)
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return -ENOMEM;
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}
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2013-10-17 03:18:36 +02:00
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m->links = hashmap_new(uint64_hash_func, uint64_compare_func);
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if (!m->links)
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return -ENOMEM;
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2014-01-21 21:58:08 +01:00
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m->netdevs = hashmap_new(string_hash_func, string_compare_func);
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if (!m->netdevs)
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2013-11-24 23:37:56 +01:00
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return -ENOMEM;
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2013-10-17 03:18:36 +02:00
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LIST_HEAD_INIT(m->networks);
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*ret = m;
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m = NULL;
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return 0;
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}
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void manager_free(Manager *m) {
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2013-11-18 11:54:09 +01:00
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Network *network;
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2014-02-07 17:03:23 +01:00
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NetDev *netdev;
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2013-11-18 11:54:09 +01:00
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Link *link;
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2014-02-13 01:38:53 +01:00
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if (!m)
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return;
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2013-10-17 03:18:36 +02:00
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udev_monitor_unref(m->udev_monitor);
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udev_unref(m->udev);
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2014-01-13 23:48:28 +01:00
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sd_bus_unref(m->bus);
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2013-10-17 03:18:36 +02:00
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sd_event_source_unref(m->udev_event_source);
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2014-02-22 20:19:49 +01:00
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sd_event_source_unref(m->sigterm_event_source);
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sd_event_source_unref(m->sigint_event_source);
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2013-10-17 03:18:36 +02:00
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sd_event_unref(m->event);
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2013-11-18 11:54:09 +01:00
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while ((link = hashmap_first(m->links)))
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link_free(link);
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2013-10-17 03:18:36 +02:00
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hashmap_free(m->links);
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2013-11-18 11:54:09 +01:00
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2014-03-31 10:01:59 +02:00
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while ((network = m->networks))
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network_free(network);
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2014-01-21 21:58:08 +01:00
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while ((netdev = hashmap_first(m->netdevs)))
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netdev_free(netdev);
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hashmap_free(m->netdevs);
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2013-11-24 23:37:56 +01:00
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2013-10-17 03:18:36 +02:00
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sd_rtnl_unref(m->rtnl);
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free(m);
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}
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2013-11-24 23:37:56 +01:00
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int manager_load_config(Manager *m) {
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int r;
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/* update timestamp */
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2014-01-08 23:41:41 +01:00
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paths_check_timestamp(network_dirs, &m->network_dirs_ts_usec, true);
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2013-11-24 23:37:56 +01:00
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2014-01-21 21:58:08 +01:00
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r = netdev_load(m);
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2013-11-24 23:37:56 +01:00
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if (r < 0)
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return r;
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r = network_load(m);
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if (r < 0)
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return r;
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return 0;
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}
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bool manager_should_reload(Manager *m) {
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2014-01-08 23:41:41 +01:00
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return paths_check_timestamp(network_dirs, &m->network_dirs_ts_usec, false);
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2013-11-24 23:37:56 +01:00
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}
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2014-04-15 14:21:44 +02:00
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static int manager_udev_process_link(Manager *m, struct udev_device *device) {
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2014-02-18 21:42:05 +01:00
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Link *link = NULL;
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2014-04-19 20:49:06 +02:00
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int r, ifindex;
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2013-10-17 03:18:36 +02:00
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2014-02-18 21:42:05 +01:00
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assert(m);
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assert(device);
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2013-10-17 03:18:36 +02:00
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2014-04-15 14:21:44 +02:00
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if (!streq_ptr(udev_device_get_action(device), "add"))
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return 0;
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2014-04-19 20:49:06 +02:00
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ifindex = udev_device_get_ifindex(device);
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if (ifindex <= 0) {
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log_debug("ignoring udev ADD event for device with invalid ifindex");
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return 0;
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}
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2014-04-15 14:21:44 +02:00
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2014-04-19 20:49:06 +02:00
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r = link_get(m, ifindex, &link);
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if (r == -ENODEV)
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2014-04-15 14:21:44 +02:00
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return 0;
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2014-04-19 20:49:06 +02:00
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else if (r < 0)
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return r;
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2014-04-15 14:21:44 +02:00
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r = link_initialized(link, device);
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if (r < 0)
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return r;
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2014-02-18 21:42:05 +01:00
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2014-04-15 14:21:44 +02:00
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return 0;
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}
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2013-10-17 03:18:36 +02:00
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2014-04-15 14:21:44 +02:00
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static int manager_rtnl_process_link(sd_rtnl *rtnl, sd_rtnl_message *message, void *userdata) {
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Manager *m = userdata;
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Link *link = NULL;
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char *name;
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int r, ifindex;
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2013-10-17 03:18:36 +02:00
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2014-04-15 14:21:44 +02:00
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assert(rtnl);
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assert(message);
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2013-10-17 03:18:36 +02:00
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assert(m);
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2014-04-15 14:21:44 +02:00
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r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
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if (r < 0 || ifindex <= 0) {
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log_warning("rtnl: received link message without valid ifindex");
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return 0;
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}
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link_get(m, ifindex, &link);
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if (!link) {
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/* link is new, so add it */
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r = link_add(m, message, &link);
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if (r < 0) {
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log_debug("could not add new link");
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return 0;
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}
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}
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2013-10-17 03:18:36 +02:00
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2014-04-15 14:21:44 +02:00
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r = sd_rtnl_message_read_string(message, IFLA_IFNAME, &name);
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2013-10-17 03:18:36 +02:00
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if (r < 0)
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2014-04-15 14:21:44 +02:00
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log_warning("rtnl: received link message without valid ifname");
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else {
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NetDev *netdev;
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2013-10-17 03:18:36 +02:00
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2014-04-15 14:21:44 +02:00
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r = netdev_get(m, name, &netdev);
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if (r >= 0) {
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r = netdev_set_ifindex(netdev, message);
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if (r < 0) {
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log_debug("could not set ifindex on netdev");
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return 0;
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}
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}
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2014-02-12 16:40:24 +01:00
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}
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2013-12-18 17:12:15 +01:00
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2014-04-15 14:21:44 +02:00
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r = link_update(link, message);
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if (r < 0)
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return 0;
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return 1;
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}
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int manager_rtnl_enumerate_links(Manager *m) {
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_cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL, *reply = NULL;
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sd_rtnl_message *link;
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int r, k;
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assert(m);
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assert(m->rtnl);
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r = sd_rtnl_message_new_link(m->rtnl, &req, RTM_GETLINK, 0);
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if (r < 0)
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return r;
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r = sd_rtnl_message_request_dump(req, true);
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2013-10-17 03:18:36 +02:00
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if (r < 0)
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2013-12-18 03:37:26 +01:00
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return r;
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2013-10-17 03:18:36 +02:00
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2014-04-15 14:21:44 +02:00
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r = sd_rtnl_call(m->rtnl, req, 0, &reply);
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if (r < 0)
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return r;
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2013-10-17 03:18:36 +02:00
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2014-04-15 14:21:44 +02:00
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for (link = reply; link; link = sd_rtnl_message_next(link)) {
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uint16_t type;
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k = sd_rtnl_message_get_type(link, &type);
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if (k < 0)
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return k;
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if (type != RTM_NEWLINK)
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continue;
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2013-10-17 03:18:36 +02:00
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2014-04-15 14:21:44 +02:00
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k = manager_rtnl_process_link(m->rtnl, link, m);
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2013-10-17 03:18:36 +02:00
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if (k < 0)
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r = k;
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}
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return r;
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}
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static int manager_dispatch_link_udev(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
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Manager *m = userdata;
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struct udev_monitor *monitor = m->udev_monitor;
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2013-12-13 03:30:42 +01:00
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_cleanup_udev_device_unref_ struct udev_device *device = NULL;
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2013-10-17 03:18:36 +02:00
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device = udev_monitor_receive_device(monitor);
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if (!device)
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return -ENOMEM;
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2014-04-15 14:21:44 +02:00
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manager_udev_process_link(m, device);
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2013-10-17 03:18:36 +02:00
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return 0;
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}
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int manager_udev_listen(Manager *m) {
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int r;
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2014-04-15 14:21:44 +02:00
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if (detect_container(NULL) > 0)
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return 0;
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assert(m->udev_monitor);
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2013-10-17 03:18:36 +02:00
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r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_monitor, "net", NULL);
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if (r < 0) {
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|
|
log_error("Could not add udev monitor filter: %s", strerror(-r));
|
|
|
|
return r;
|
|
|
|
}
|
|
|
|
|
|
|
|
r = udev_monitor_enable_receiving(m->udev_monitor);
|
|
|
|
if (r < 0) {
|
|
|
|
log_error("Could not enable udev monitor");
|
|
|
|
return r;
|
|
|
|
}
|
|
|
|
|
|
|
|
r = sd_event_add_io(m->event,
|
2014-02-19 23:54:58 +01:00
|
|
|
&m->udev_event_source,
|
2013-10-17 03:18:36 +02:00
|
|
|
udev_monitor_get_fd(m->udev_monitor),
|
|
|
|
EPOLLIN, manager_dispatch_link_udev,
|
2014-02-19 23:54:58 +01:00
|
|
|
m);
|
2013-10-17 03:18:36 +02:00
|
|
|
if (r < 0)
|
|
|
|
return r;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
2013-11-14 16:22:51 +01:00
|
|
|
|
|
|
|
int manager_rtnl_listen(Manager *m) {
|
|
|
|
int r;
|
|
|
|
|
|
|
|
r = sd_rtnl_attach_event(m->rtnl, m->event, 0);
|
|
|
|
if (r < 0)
|
|
|
|
return r;
|
|
|
|
|
2013-12-03 18:48:20 +01:00
|
|
|
r = sd_rtnl_add_match(m->rtnl, RTM_NEWLINK, &manager_rtnl_process_link, m);
|
|
|
|
if (r < 0)
|
|
|
|
return r;
|
|
|
|
|
2013-11-14 16:22:51 +01:00
|
|
|
return 0;
|
|
|
|
}
|
2014-01-05 23:01:10 +01:00
|
|
|
|
2014-01-13 23:48:28 +01:00
|
|
|
int manager_bus_listen(Manager *m) {
|
|
|
|
int r;
|
|
|
|
|
2014-01-18 01:37:35 +01:00
|
|
|
assert(m->event);
|
|
|
|
|
|
|
|
if (!m->bus) /* TODO: drop when we can rely on kdbus */
|
|
|
|
return 0;
|
|
|
|
|
2014-01-13 23:48:28 +01:00
|
|
|
r = sd_bus_attach_event(m->bus, m->event, 0);
|
|
|
|
if (r < 0)
|
|
|
|
return r;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2014-01-05 23:01:10 +01:00
|
|
|
static void append_dns(FILE *f, struct in_addr *dns, unsigned char family, unsigned *count) {
|
|
|
|
char buf[INET6_ADDRSTRLEN];
|
|
|
|
const char *address;
|
|
|
|
|
|
|
|
address = inet_ntop(family, dns, buf, INET6_ADDRSTRLEN);
|
|
|
|
if (!address) {
|
|
|
|
log_warning("Invalid DNS address. Ignoring.");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (*count == MAXNS)
|
2014-01-12 15:44:40 +01:00
|
|
|
fputs("# Too many DNS servers configured, the following entries "
|
|
|
|
"will be ignored\n", f);
|
2014-01-05 23:01:10 +01:00
|
|
|
|
|
|
|
fprintf(f, "nameserver %s\n", address);
|
|
|
|
|
|
|
|
(*count) ++;
|
|
|
|
}
|
|
|
|
|
|
|
|
int manager_update_resolv_conf(Manager *m) {
|
|
|
|
_cleanup_free_ char *temp_path = NULL;
|
|
|
|
_cleanup_fclose_ FILE *f = NULL;
|
|
|
|
Link *link;
|
|
|
|
Iterator i;
|
|
|
|
unsigned count = 0;
|
2014-01-18 15:47:57 +01:00
|
|
|
const char *domainname = NULL;
|
2014-01-05 23:01:10 +01:00
|
|
|
int r;
|
|
|
|
|
|
|
|
assert(m);
|
|
|
|
|
|
|
|
r = fopen_temporary("/run/systemd/network/resolv.conf", &f, &temp_path);
|
|
|
|
if (r < 0)
|
|
|
|
return r;
|
|
|
|
|
|
|
|
fchmod(fileno(f), 0644);
|
|
|
|
|
2014-01-17 17:09:56 +01:00
|
|
|
fputs("# This file is managed by systemd-networkd(8). Do not edit.\n#\n"
|
|
|
|
"# Third party programs must not access this file directly, but\n"
|
|
|
|
"# only through the symlink at /etc/resolv.conf. To manage\n"
|
|
|
|
"# resolv.conf(5) in a different way, replace the symlink by a\n"
|
|
|
|
"# static file or a different symlink.\n\n", f);
|
2014-01-05 23:01:10 +01:00
|
|
|
|
|
|
|
HASHMAP_FOREACH(link, m->links, i) {
|
2014-02-04 23:13:52 +01:00
|
|
|
if (link->dhcp_lease) {
|
2014-01-16 19:32:22 +01:00
|
|
|
struct in_addr *nameservers;
|
|
|
|
size_t nameservers_size;
|
2014-01-05 23:01:10 +01:00
|
|
|
|
2014-01-18 15:47:57 +01:00
|
|
|
if (link->network->dhcp_dns) {
|
2014-02-04 23:13:52 +01:00
|
|
|
r = sd_dhcp_lease_get_dns(link->dhcp_lease, &nameservers, &nameservers_size);
|
2014-01-18 15:47:57 +01:00
|
|
|
if (r >= 0) {
|
|
|
|
unsigned j;
|
2014-01-05 23:01:10 +01:00
|
|
|
|
2014-01-18 15:47:57 +01:00
|
|
|
for (j = 0; j < nameservers_size; j++)
|
|
|
|
append_dns(f, &nameservers[j], AF_INET, &count);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (link->network->dhcp_domainname && !domainname) {
|
2014-02-04 23:13:52 +01:00
|
|
|
r = sd_dhcp_lease_get_domainname(link->dhcp_lease, &domainname);
|
2014-01-18 15:47:57 +01:00
|
|
|
if (r >= 0)
|
|
|
|
fprintf(f, "domain %s\n", domainname);
|
2014-01-05 23:01:10 +01:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-03-13 20:46:45 +01:00
|
|
|
HASHMAP_FOREACH(link, m->links, i) {
|
|
|
|
if (link->network && link->network->dns) {
|
|
|
|
Address *address;
|
|
|
|
Iterator j;
|
|
|
|
|
|
|
|
SET_FOREACH(address, link->network->dns, j) {
|
|
|
|
append_dns(f, &address->in_addr.in,
|
|
|
|
address->family, &count);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
2014-01-05 23:01:10 +01:00
|
|
|
|
|
|
|
fflush(f);
|
|
|
|
|
|
|
|
if (ferror(f) || rename(temp_path, "/run/systemd/network/resolv.conf") < 0) {
|
|
|
|
r = -errno;
|
|
|
|
unlink("/run/systemd/network/resolv.conf");
|
|
|
|
unlink(temp_path);
|
|
|
|
return r;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|