1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2013 Tom Gundersen <teg@jklm.no>
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 <sys/socket.h>
25 #include "conf-parser.h"
26 #include "path-util.h"
28 #include "networkd-netdev.h"
29 #include "networkd-link.h"
30 #include "network-internal.h"
31 #include "libudev-private.h"
32 #include "udev-util.h"
33 #include "rtnl-util.h"
38 #include "sd-daemon.h"
40 /* use 8 MB for receive socket kernel queue. */
41 #define RCVBUF_SIZE (8*1024*1024)
43 const char* const network_dirs[] = {
44 "/etc/systemd/network",
45 "/run/systemd/network",
46 "/usr/lib/systemd/network",
48 "/lib/systemd/network",
52 static int setup_default_address_pool(Manager *m) {
58 /* Add in the well-known private address ranges. */
60 r = address_pool_new_from_string(m, &p, AF_INET6, "fc00::", 7);
64 r = address_pool_new_from_string(m, &p, AF_INET, "192.168.0.0", 16);
68 r = address_pool_new_from_string(m, &p, AF_INET, "172.16.0.0", 12);
72 r = address_pool_new_from_string(m, &p, AF_INET, "10.0.0.0", 8);
79 int manager_connect_bus(Manager *m);
81 static int on_bus_retry(sd_event_source *s, usec_t usec, void *userdata) {
82 Manager *m = userdata;
87 m->bus_retry_event_source = sd_event_source_unref(m->bus_retry_event_source);
89 manager_connect_bus(m);
94 static int manager_reset_all(Manager *m) {
101 HASHMAP_FOREACH(link, m->links, i) {
102 r = link_carrier_reset(link);
104 log_link_warning_errno(link, r, "could not reset carrier: %m");
110 static int match_prepare_for_sleep(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *ret_error) {
111 Manager *m = userdata;
117 r = sd_bus_message_read(message, "b", &b);
119 log_debug_errno(r, "Failed to parse PrepareForSleep signal: %m");
126 log_debug("Coming back from suspend, resetting all connections...");
128 manager_reset_all(m);
133 int manager_connect_bus(Manager *m) {
138 r = sd_bus_default_system(&m->bus);
140 /* We failed to connect? Yuck, we must be in early
141 * boot. Let's try in 5s again. As soon as we have
142 * kdbus we can stop doing this... */
144 log_debug_errno(r, "Failed to connect to bus, trying again in 5s: %m");
146 r = sd_event_add_time(m->event, &m->bus_retry_event_source, CLOCK_MONOTONIC, now(CLOCK_MONOTONIC) + 5*USEC_PER_SEC, 0, on_bus_retry, m);
148 return log_error_errno(r, "Failed to install bus reconnect time event: %m");
154 r = sd_bus_add_match(m->bus, &m->prepare_for_sleep_slot,
156 "sender='org.freedesktop.login1',"
157 "interface='org.freedesktop.login1.Manager',"
158 "member='PrepareForSleep',"
159 "path='/org/freedesktop/login1'",
160 match_prepare_for_sleep,
163 return log_error_errno(r, "Failed to add match for PrepareForSleep: %m");
165 r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/network1", "org.freedesktop.network1.Manager", manager_vtable, m);
167 return log_error_errno(r, "Failed to add manager object vtable: %m");
169 r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/network1/link", "org.freedesktop.network1.Link", link_vtable, link_object_find, m);
171 return log_error_errno(r, "Failed to add link object vtable: %m");
173 r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/network1/link", link_node_enumerator, m);
175 return log_error_errno(r, "Failed to add link enumerator: %m");
177 r = sd_bus_request_name(m->bus, "org.freedesktop.network1", 0);
179 return log_error_errno(r, "Failed to register name: %m");
181 r = sd_bus_attach_event(m->bus, m->event, 0);
183 return log_error_errno(r, "Failed to attach bus to event loop: %m");
188 static int manager_udev_process_link(Manager *m, struct udev_device *device) {
195 if (!streq_ptr(udev_device_get_action(device), "add"))
198 ifindex = udev_device_get_ifindex(device);
200 log_debug("ignoring udev ADD event for device with invalid ifindex");
204 r = link_get(m, ifindex, &link);
210 r = link_initialized(link, device);
217 static int manager_dispatch_link_udev(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
218 Manager *m = userdata;
219 struct udev_monitor *monitor = m->udev_monitor;
220 _cleanup_udev_device_unref_ struct udev_device *device = NULL;
222 device = udev_monitor_receive_device(monitor);
226 manager_udev_process_link(m, device);
230 static int manager_connect_udev(Manager *m) {
233 /* udev does not initialize devices inside containers,
234 * so we rely on them being already initialized before
235 * entering the container */
236 if (detect_container(NULL) > 0)
239 m->udev = udev_new();
243 m->udev_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
244 if (!m->udev_monitor)
247 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_monitor, "net", NULL);
249 return log_error_errno(r, "Could not add udev monitor filter: %m");
251 r = udev_monitor_enable_receiving(m->udev_monitor);
253 log_error("Could not enable udev monitor");
257 r = sd_event_add_io(m->event,
258 &m->udev_event_source,
259 udev_monitor_get_fd(m->udev_monitor),
260 EPOLLIN, manager_dispatch_link_udev,
265 r = sd_event_source_set_description(m->udev_event_source, "networkd-udev");
272 static int manager_rtnl_process_link(sd_rtnl *rtnl, sd_rtnl_message *message, void *userdata) {
273 Manager *m = userdata;
275 NetDev *netdev = NULL;
284 if (sd_rtnl_message_is_error(message)) {
285 r = sd_rtnl_message_get_errno(message);
287 log_warning_errno(r, "rtnl: could not receive link: %m");
292 r = sd_rtnl_message_get_type(message, &type);
294 log_warning_errno(r, "rtnl: could not get message type: %m");
298 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
300 log_warning_errno(r, "rtnl: could not get ifindex: %m");
302 } else if (ifindex <= 0) {
303 log_warning("rtnl: received link message with invalid ifindex: %d", ifindex);
306 link_get(m, ifindex, &link);
308 r = sd_rtnl_message_read_string(message, IFLA_IFNAME, &name);
310 log_warning_errno(r, "rtnl: received link message without ifname: %m");
313 netdev_get(m, name, &netdev);
318 /* link is new, so add it */
319 r = link_add(m, message, &link);
321 log_warning_errno(r, "could not add new link: %m");
327 /* netdev exists, so make sure the ifindex matches */
328 r = netdev_set_ifindex(netdev, message);
330 log_warning_errno(r, "could not set ifindex on netdev: %m");
335 r = link_update(link, message);
348 assert_not_reached("Received invalid RTNL message type.");
354 static int systemd_netlink_fd(void) {
355 int n, fd, rtnl_fd = -EINVAL;
357 n = sd_listen_fds(true);
361 for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd ++) {
362 if (sd_is_socket(fd, AF_NETLINK, SOCK_RAW, -1) > 0) {
373 static int manager_connect_rtnl(Manager *m) {
378 fd = systemd_netlink_fd();
380 r = sd_rtnl_open(&m->rtnl, 3, RTNLGRP_LINK, RTNLGRP_IPV4_IFADDR, RTNLGRP_IPV6_IFADDR);
382 r = sd_rtnl_open_fd(&m->rtnl, fd, 0);
386 r = sd_rtnl_inc_rcvbuf(m->rtnl, RCVBUF_SIZE);
390 r = sd_rtnl_attach_event(m->rtnl, m->event, 0);
394 r = sd_rtnl_add_match(m->rtnl, RTM_NEWLINK, &manager_rtnl_process_link, m);
398 r = sd_rtnl_add_match(m->rtnl, RTM_DELLINK, &manager_rtnl_process_link, m);
402 r = sd_rtnl_add_match(m->rtnl, RTM_NEWADDR, &link_rtnl_process_address, m);
406 r = sd_rtnl_add_match(m->rtnl, RTM_DELADDR, &link_rtnl_process_address, m);
413 int manager_new(Manager **ret) {
414 _cleanup_manager_free_ Manager *m = NULL;
417 m = new0(Manager, 1);
421 m->state_file = strdup("/run/systemd/netif/state");
425 r = sd_event_default(&m->event);
429 sd_event_set_watchdog(m->event, true);
431 sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL);
432 sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL);
434 r = manager_connect_rtnl(m);
438 r = manager_connect_bus(m);
442 r = manager_connect_udev(m);
446 m->netdevs = hashmap_new(&string_hash_ops);
450 LIST_HEAD_INIT(m->networks);
452 r = setup_default_address_pool(m);
462 void manager_free(Manager *m) {
473 udev_monitor_unref(m->udev_monitor);
475 sd_bus_unref(m->bus);
476 sd_bus_slot_unref(m->prepare_for_sleep_slot);
477 sd_event_source_unref(m->udev_event_source);
478 sd_event_source_unref(m->bus_retry_event_source);
479 sd_event_unref(m->event);
481 while ((link = hashmap_first(m->links)))
483 hashmap_free(m->links);
485 while ((network = m->networks))
486 network_free(network);
488 while ((netdev = hashmap_first(m->netdevs)))
489 netdev_unref(netdev);
490 hashmap_free(m->netdevs);
492 while ((pool = m->address_pools))
493 address_pool_free(pool);
495 sd_rtnl_unref(m->rtnl);
500 int manager_load_config(Manager *m) {
503 /* update timestamp */
504 paths_check_timestamp(network_dirs, &m->network_dirs_ts_usec, true);
517 bool manager_should_reload(Manager *m) {
518 return paths_check_timestamp(network_dirs, &m->network_dirs_ts_usec, false);
521 int manager_rtnl_enumerate_links(Manager *m) {
522 _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL, *reply = NULL;
523 sd_rtnl_message *link;
529 r = sd_rtnl_message_new_link(m->rtnl, &req, RTM_GETLINK, 0);
533 r = sd_rtnl_message_request_dump(req, true);
537 r = sd_rtnl_call(m->rtnl, req, 0, &reply);
541 for (link = reply; link; link = sd_rtnl_message_next(link)) {
544 m->enumerating = true;
546 k = manager_rtnl_process_link(m->rtnl, link, m);
550 m->enumerating = false;
556 int manager_rtnl_enumerate_addresses(Manager *m) {
557 _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL, *reply = NULL;
558 sd_rtnl_message *addr;
564 r = sd_rtnl_message_new_addr(m->rtnl, &req, RTM_GETADDR, 0, 0);
568 r = sd_rtnl_message_request_dump(req, true);
572 r = sd_rtnl_call(m->rtnl, req, 0, &reply);
576 for (addr = reply; addr; addr = sd_rtnl_message_next(addr)) {
579 m->enumerating = true;
581 k = link_rtnl_process_address(m->rtnl, addr, m);
585 m->enumerating = false;
591 static int set_put_in_addr(Set *s, const struct in_addr *address) {
597 r = in_addr_to_string(AF_INET, (const union in_addr_union*) address, &p);
601 r = set_consume(s, p);
608 static int set_put_in_addrv(Set *s, const struct in_addr *addresses, int n) {
612 assert(n <= 0 || addresses);
614 for (i = 0; i < n; i++) {
615 r = set_put_in_addr(s, addresses+i);
625 static void print_string_set(FILE *f, const char *field, Set *s) {
635 SET_FOREACH(p, s, i) {
644 int manager_save(Manager *m) {
645 _cleanup_set_free_free_ Set *dns = NULL, *ntp = NULL, *domains = NULL;
648 _cleanup_free_ char *temp_path = NULL;
649 _cleanup_fclose_ FILE *f = NULL;
650 LinkOperationalState operstate = LINK_OPERSTATE_OFF;
651 const char *operstate_str;
655 assert(m->state_file);
657 /* We add all NTP and DNS server to a set, to filter out duplicates */
658 dns = set_new(&string_hash_ops);
662 ntp = set_new(&string_hash_ops);
666 domains = set_new(&string_hash_ops);
670 HASHMAP_FOREACH(link, m->links, i) {
671 if (link->flags & IFF_LOOPBACK)
674 if (link->operstate > operstate)
675 operstate = link->operstate;
680 /* First add the static configured entries */
681 r = set_put_strdupv(dns, link->network->dns);
685 r = set_put_strdupv(ntp, link->network->ntp);
689 r = set_put_strdupv(domains, link->network->domains);
693 if (!link->dhcp_lease)
696 /* Secondly, add the entries acquired via DHCP */
697 if (link->network->dhcp_dns) {
698 const struct in_addr *addresses;
700 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
702 r = set_put_in_addrv(dns, addresses, r);
705 } else if (r < 0 && r != -ENOENT)
709 if (link->network->dhcp_ntp) {
710 const struct in_addr *addresses;
712 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
714 r = set_put_in_addrv(ntp, addresses, r);
717 } else if (r < 0 && r != -ENOENT)
721 if (link->network->dhcp_domains) {
722 const char *domainname;
724 r = sd_dhcp_lease_get_domainname(link->dhcp_lease, &domainname);
726 r = set_put_strdup(domains, domainname);
729 } else if (r != -ENOENT)
734 operstate_str = link_operstate_to_string(operstate);
735 assert(operstate_str);
737 r = fopen_temporary(m->state_file, &f, &temp_path);
741 fchmod(fileno(f), 0644);
744 "# This is private data. Do not parse.\n"
745 "OPER_STATE=%s\n", operstate_str);
747 print_string_set(f, "DNS=", dns);
748 print_string_set(f, "NTP=", ntp);
749 print_string_set(f, "DOMAINS=", domains);
751 r = fflush_and_check(f);
755 if (rename(temp_path, m->state_file) < 0) {
760 if (m->operational_state != operstate) {
761 m->operational_state = operstate;
762 r = manager_send_changed(m, "OperationalState", NULL);
764 log_error_errno(r, "Could not emit changed OperationalState: %m");
770 log_error_errno(r, "Failed to save network state to %s: %m", m->state_file);
771 unlink(m->state_file);
776 int manager_address_pool_acquire(Manager *m, int family, unsigned prefixlen, union in_addr_union *found) {
781 assert(prefixlen > 0);
784 LIST_FOREACH(address_pools, p, m->address_pools) {
785 if (p->family != family)
788 r = address_pool_acquire(p, prefixlen, found);
796 const char *address_family_boolean_to_string(AddressFamilyBoolean b) {
797 if (b == ADDRESS_FAMILY_YES ||
798 b == ADDRESS_FAMILY_NO)
799 return yes_no(b == ADDRESS_FAMILY_YES);
801 if (b == ADDRESS_FAMILY_IPV4)
803 if (b == ADDRESS_FAMILY_IPV6)
809 AddressFamilyBoolean address_family_boolean_from_string(const char *s) {
812 /* Make this a true superset of a boolean */
814 r = parse_boolean(s);
816 return ADDRESS_FAMILY_YES;
818 return ADDRESS_FAMILY_NO;
820 if (streq(s, "ipv4"))
821 return ADDRESS_FAMILY_IPV4;
822 if (streq(s, "ipv6"))
823 return ADDRESS_FAMILY_IPV6;
825 return _ADDRESS_FAMILY_BOOLEAN_INVALID;
828 DEFINE_CONFIG_PARSE_ENUM(config_parse_address_family_boolean, address_family_boolean, AddressFamilyBoolean, "Failed to parse option");