2 This file is part of systemd.
4 Copyright 2013 Tom Gundersen <teg@jklm.no>
6 systemd is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
11 systemd is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License
17 along with systemd; If not, see <http://www.gnu.org/licenses/>.
20 #include <sys/socket.h>
23 #include "sd-daemon.h"
24 #include "sd-netlink.h"
26 #include "alloc-util.h"
28 #include "conf-parser.h"
30 #include "dns-domain.h"
33 #include "libudev-private.h"
34 #include "local-addresses.h"
35 #include "netlink-util.h"
37 #include "ordered-set.h"
38 #include "path-util.h"
40 #include "udev-util.h"
43 /* use 8 MB for receive socket kernel queue. */
44 #define RCVBUF_SIZE (8*1024*1024)
46 const char* const network_dirs
[] = {
47 "/etc/systemd/network",
48 "/run/systemd/network",
49 "/usr/lib/systemd/network",
51 "/lib/systemd/network",
55 static int setup_default_address_pool(Manager
*m
) {
61 /* Add in the well-known private address ranges. */
63 r
= address_pool_new_from_string(m
, &p
, AF_INET6
, "fc00::", 7);
67 r
= address_pool_new_from_string(m
, &p
, AF_INET
, "192.168.0.0", 16);
71 r
= address_pool_new_from_string(m
, &p
, AF_INET
, "172.16.0.0", 12);
75 r
= address_pool_new_from_string(m
, &p
, AF_INET
, "10.0.0.0", 8);
82 static int on_bus_retry(sd_event_source
*s
, usec_t usec
, void *userdata
) {
83 Manager
*m
= userdata
;
88 m
->bus_retry_event_source
= sd_event_source_unref(m
->bus_retry_event_source
);
90 manager_connect_bus(m
);
95 static int manager_reset_all(Manager
*m
) {
102 HASHMAP_FOREACH(link
, m
->links
, i
) {
103 r
= link_carrier_reset(link
);
105 log_link_warning_errno(link
, r
, "Could not reset carrier: %m");
111 static int match_prepare_for_sleep(sd_bus_message
*message
, void *userdata
, sd_bus_error
*ret_error
) {
112 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");
156 r
= sd_bus_add_match(m
->bus
, &m
->prepare_for_sleep_slot
,
158 "sender='org.freedesktop.login1',"
159 "interface='org.freedesktop.login1.Manager',"
160 "member='PrepareForSleep',"
161 "path='/org/freedesktop/login1'",
162 match_prepare_for_sleep
,
165 return log_error_errno(r
, "Failed to add match for PrepareForSleep: %m");
167 r
= sd_bus_add_object_vtable(m
->bus
, NULL
, "/org/freedesktop/network1", "org.freedesktop.network1.Manager", manager_vtable
, m
);
169 return log_error_errno(r
, "Failed to add manager object vtable: %m");
171 r
= sd_bus_add_fallback_vtable(m
->bus
, NULL
, "/org/freedesktop/network1/link", "org.freedesktop.network1.Link", link_vtable
, link_object_find
, m
);
173 return log_error_errno(r
, "Failed to add link object vtable: %m");
175 r
= sd_bus_add_node_enumerator(m
->bus
, NULL
, "/org/freedesktop/network1/link", link_node_enumerator
, m
);
177 return log_error_errno(r
, "Failed to add link enumerator: %m");
179 r
= sd_bus_add_fallback_vtable(m
->bus
, NULL
, "/org/freedesktop/network1/network", "org.freedesktop.network1.Network", network_vtable
, network_object_find
, m
);
181 return log_error_errno(r
, "Failed to add network object vtable: %m");
183 r
= sd_bus_add_node_enumerator(m
->bus
, NULL
, "/org/freedesktop/network1/network", network_node_enumerator
, m
);
185 return log_error_errno(r
, "Failed to add network enumerator: %m");
187 r
= sd_bus_request_name(m
->bus
, "org.freedesktop.network1", 0);
189 return log_error_errno(r
, "Failed to register name: %m");
191 r
= sd_bus_attach_event(m
->bus
, m
->event
, 0);
193 return log_error_errno(r
, "Failed to attach bus to event loop: %m");
198 static int manager_udev_process_link(Manager
*m
, struct udev_device
*device
) {
205 if (!streq_ptr(udev_device_get_action(device
), "add"))
208 ifindex
= udev_device_get_ifindex(device
);
210 log_debug("Ignoring udev ADD event for device with invalid ifindex");
214 r
= link_get(m
, ifindex
, &link
);
220 r
= link_initialized(link
, device
);
227 static int manager_dispatch_link_udev(sd_event_source
*source
, int fd
, uint32_t revents
, void *userdata
) {
228 Manager
*m
= userdata
;
229 struct udev_monitor
*monitor
= m
->udev_monitor
;
230 _cleanup_udev_device_unref_
struct udev_device
*device
= NULL
;
232 device
= udev_monitor_receive_device(monitor
);
236 manager_udev_process_link(m
, device
);
240 static int manager_connect_udev(Manager
*m
) {
243 /* udev does not initialize devices inside containers,
244 * so we rely on them being already initialized before
245 * entering the container */
246 if (detect_container() > 0)
249 m
->udev
= udev_new();
253 m
->udev_monitor
= udev_monitor_new_from_netlink(m
->udev
, "udev");
254 if (!m
->udev_monitor
)
257 r
= udev_monitor_filter_add_match_subsystem_devtype(m
->udev_monitor
, "net", NULL
);
259 return log_error_errno(r
, "Could not add udev monitor filter: %m");
261 r
= udev_monitor_enable_receiving(m
->udev_monitor
);
263 log_error("Could not enable udev monitor");
267 r
= sd_event_add_io(m
->event
,
268 &m
->udev_event_source
,
269 udev_monitor_get_fd(m
->udev_monitor
),
270 EPOLLIN
, manager_dispatch_link_udev
,
275 r
= sd_event_source_set_description(m
->udev_event_source
, "networkd-udev");
282 int manager_rtnl_process_route(sd_netlink
*rtnl
, sd_netlink_message
*message
, void *userdata
) {
283 Manager
*m
= userdata
;
286 uint32_t ifindex
, priority
= 0;
287 unsigned char protocol
, scope
, tos
, table
;
289 unsigned char dst_prefixlen
, src_prefixlen
;
290 union in_addr_union dst
= {}, gw
= {}, src
= {}, prefsrc
= {};
298 if (sd_netlink_message_is_error(message
)) {
299 r
= sd_netlink_message_get_errno(message
);
301 log_warning_errno(r
, "rtnl: failed to receive route: %m");
306 r
= sd_netlink_message_get_type(message
, &type
);
308 log_warning_errno(r
, "rtnl: could not get message type: %m");
310 } else if (type
!= RTM_NEWROUTE
&& type
!= RTM_DELROUTE
) {
311 log_warning("rtnl: received unexpected message type when processing route");
315 r
= sd_netlink_message_read_u32(message
, RTA_OIF
, &ifindex
);
317 log_debug("rtnl: received route without ifindex, ignoring");
320 log_warning_errno(r
, "rtnl: could not get ifindex from route, ignoring: %m");
322 } else if (ifindex
<= 0) {
323 log_warning("rtnl: received route message with invalid ifindex, ignoring: %d", ifindex
);
326 r
= link_get(m
, ifindex
, &link
);
327 if (r
< 0 || !link
) {
328 /* when enumerating we might be out of sync, but we will
329 * get the route again, so just ignore it */
331 log_warning("rtnl: received route for nonexistent link (%d), ignoring", ifindex
);
336 r
= sd_rtnl_message_route_get_family(message
, &family
);
337 if (r
< 0 || !IN_SET(family
, AF_INET
, AF_INET6
)) {
338 log_link_warning(link
, "rtnl: received address with invalid family, ignoring.");
342 r
= sd_rtnl_message_route_get_protocol(message
, &protocol
);
344 log_warning_errno(r
, "rtnl: could not get route protocol: %m");
350 r
= sd_netlink_message_read_in_addr(message
, RTA_DST
, &dst
.in
);
351 if (r
< 0 && r
!= -ENODATA
) {
352 log_link_warning_errno(link
, r
, "rtnl: received route without valid destination, ignoring: %m");
356 r
= sd_netlink_message_read_in_addr(message
, RTA_GATEWAY
, &gw
.in
);
357 if (r
< 0 && r
!= -ENODATA
) {
358 log_link_warning_errno(link
, r
, "rtnl: received route with invalid gateway, ignoring: %m");
362 r
= sd_netlink_message_read_in_addr(message
, RTA_SRC
, &src
.in
);
363 if (r
< 0 && r
!= -ENODATA
) {
364 log_link_warning_errno(link
, r
, "rtnl: received route with invalid source, ignoring: %m");
368 r
= sd_netlink_message_read_in_addr(message
, RTA_PREFSRC
, &prefsrc
.in
);
369 if (r
< 0 && r
!= -ENODATA
) {
370 log_link_warning_errno(link
, r
, "rtnl: received route with invalid preferred source, ignoring: %m");
377 r
= sd_netlink_message_read_in6_addr(message
, RTA_DST
, &dst
.in6
);
378 if (r
< 0 && r
!= -ENODATA
) {
379 log_link_warning_errno(link
, r
, "rtnl: received route without valid destination, ignoring: %m");
383 r
= sd_netlink_message_read_in6_addr(message
, RTA_GATEWAY
, &gw
.in6
);
384 if (r
< 0 && r
!= -ENODATA
) {
385 log_link_warning_errno(link
, r
, "rtnl: received route with invalid gateway, ignoring: %m");
389 r
= sd_netlink_message_read_in6_addr(message
, RTA_SRC
, &src
.in6
);
390 if (r
< 0 && r
!= -ENODATA
) {
391 log_link_warning_errno(link
, r
, "rtnl: received route with invalid source, ignoring: %m");
395 r
= sd_netlink_message_read_in6_addr(message
, RTA_PREFSRC
, &prefsrc
.in6
);
396 if (r
< 0 && r
!= -ENODATA
) {
397 log_link_warning_errno(link
, r
, "rtnl: received route with invalid preferred source, ignoring: %m");
404 log_link_debug(link
, "rtnl: ignoring unsupported address family: %d", family
);
408 r
= sd_rtnl_message_route_get_dst_prefixlen(message
, &dst_prefixlen
);
410 log_link_warning_errno(link
, r
, "rtnl: received route with invalid destination prefixlen, ignoring: %m");
414 r
= sd_rtnl_message_route_get_src_prefixlen(message
, &src_prefixlen
);
416 log_link_warning_errno(link
, r
, "rtnl: received route with invalid source prefixlen, ignoring: %m");
420 r
= sd_rtnl_message_route_get_scope(message
, &scope
);
422 log_link_warning_errno(link
, r
, "rtnl: received route with invalid scope, ignoring: %m");
426 r
= sd_rtnl_message_route_get_tos(message
, &tos
);
428 log_link_warning_errno(link
, r
, "rtnl: received route with invalid tos, ignoring: %m");
432 r
= sd_rtnl_message_route_get_table(message
, &table
);
434 log_link_warning_errno(link
, r
, "rtnl: received route with invalid table, ignoring: %m");
438 r
= sd_netlink_message_read_u32(message
, RTA_PRIORITY
, &priority
);
439 if (r
< 0 && r
!= -ENODATA
) {
440 log_link_warning_errno(link
, r
, "rtnl: received route with invalid priority, ignoring: %m");
444 route_get(link
, family
, &dst
, dst_prefixlen
, tos
, priority
, table
, &route
);
449 /* A route appeared that we did not request */
450 r
= route_add_foreign(link
, family
, &dst
, dst_prefixlen
, tos
, priority
, table
, &route
);
455 route_update(route
, &src
, src_prefixlen
, &gw
, &prefsrc
, scope
, protocol
);
464 assert_not_reached("Received invalid RTNL message type");
470 int manager_rtnl_process_address(sd_netlink
*rtnl
, sd_netlink_message
*message
, void *userdata
) {
471 Manager
*m
= userdata
;
476 unsigned char prefixlen
;
478 union in_addr_union in_addr
;
479 struct ifa_cacheinfo cinfo
;
480 Address
*address
= NULL
;
481 char buf
[INET6_ADDRSTRLEN
], valid_buf
[FORMAT_TIMESPAN_MAX
];
482 const char *valid_str
= NULL
;
489 if (sd_netlink_message_is_error(message
)) {
490 r
= sd_netlink_message_get_errno(message
);
492 log_warning_errno(r
, "rtnl: failed to receive address: %m");
497 r
= sd_netlink_message_get_type(message
, &type
);
499 log_warning_errno(r
, "rtnl: could not get message type: %m");
501 } else if (type
!= RTM_NEWADDR
&& type
!= RTM_DELADDR
) {
502 log_warning("rtnl: received unexpected message type when processing address");
506 r
= sd_rtnl_message_addr_get_ifindex(message
, &ifindex
);
508 log_warning_errno(r
, "rtnl: could not get ifindex from address: %m");
510 } else if (ifindex
<= 0) {
511 log_warning("rtnl: received address message with invalid ifindex: %d", ifindex
);
514 r
= link_get(m
, ifindex
, &link
);
515 if (r
< 0 || !link
) {
516 /* when enumerating we might be out of sync, but we will
517 * get the address again, so just ignore it */
519 log_warning("rtnl: received address for nonexistent link (%d), ignoring", ifindex
);
524 r
= sd_rtnl_message_addr_get_family(message
, &family
);
525 if (r
< 0 || !IN_SET(family
, AF_INET
, AF_INET6
)) {
526 log_link_warning(link
, "rtnl: received address with invalid family, ignoring.");
530 r
= sd_rtnl_message_addr_get_prefixlen(message
, &prefixlen
);
532 log_link_warning_errno(link
, r
, "rtnl: received address with invalid prefixlen, ignoring: %m");
536 r
= sd_rtnl_message_addr_get_scope(message
, &scope
);
538 log_link_warning_errno(link
, r
, "rtnl: received address with invalid scope, ignoring: %m");
542 r
= sd_rtnl_message_addr_get_flags(message
, &flags
);
544 log_link_warning_errno(link
, r
, "rtnl: received address with invalid flags, ignoring: %m");
550 r
= sd_netlink_message_read_in_addr(message
, IFA_LOCAL
, &in_addr
.in
);
552 log_link_warning_errno(link
, r
, "rtnl: received address without valid address, ignoring: %m");
559 r
= sd_netlink_message_read_in6_addr(message
, IFA_ADDRESS
, &in_addr
.in6
);
561 log_link_warning_errno(link
, r
, "rtnl: received address without valid address, ignoring: %m");
568 log_link_debug(link
, "rtnl: ignoring unsupported address family: %d", family
);
571 if (!inet_ntop(family
, &in_addr
, buf
, INET6_ADDRSTRLEN
)) {
572 log_link_warning(link
, "Could not print address");
576 r
= sd_netlink_message_read_cache_info(message
, IFA_CACHEINFO
, &cinfo
);
578 if (cinfo
.ifa_valid
!= CACHE_INFO_INFINITY_LIFE_TIME
)
579 valid_str
= format_timespan(valid_buf
, FORMAT_TIMESPAN_MAX
,
580 cinfo
.ifa_valid
* USEC_PER_SEC
,
584 address_get(link
, family
, &in_addr
, prefixlen
, &address
);
589 log_link_debug(link
, "Updating address: %s/%u (valid %s%s)", buf
, prefixlen
,
590 valid_str
? "for " : "forever", valid_str
?: "");
592 /* An address appeared that we did not request */
593 r
= address_add_foreign(link
, family
, &in_addr
, prefixlen
, &address
);
595 log_link_warning_errno(link
, r
, "Failed to add address %s/%u: %m", buf
, prefixlen
);
598 log_link_debug(link
, "Adding address: %s/%u (valid %s%s)", buf
, prefixlen
,
599 valid_str
? "for " : "forever", valid_str
?: "");
602 address_update(address
, flags
, scope
, &cinfo
);
609 log_link_debug(link
, "Removing address: %s/%u (valid %s%s)", buf
, prefixlen
,
610 valid_str
? "for " : "forever", valid_str
?: "");
611 address_drop(address
);
613 log_link_warning(link
, "Removing non-existent address: %s/%u (valid %s%s)", buf
, prefixlen
,
614 valid_str
? "for " : "forever", valid_str
?: "");
618 assert_not_reached("Received invalid RTNL message type");
624 static int manager_rtnl_process_link(sd_netlink
*rtnl
, sd_netlink_message
*message
, void *userdata
) {
625 Manager
*m
= userdata
;
627 NetDev
*netdev
= NULL
;
636 if (sd_netlink_message_is_error(message
)) {
637 r
= sd_netlink_message_get_errno(message
);
639 log_warning_errno(r
, "rtnl: Could not receive link: %m");
644 r
= sd_netlink_message_get_type(message
, &type
);
646 log_warning_errno(r
, "rtnl: Could not get message type: %m");
648 } else if (type
!= RTM_NEWLINK
&& type
!= RTM_DELLINK
) {
649 log_warning("rtnl: Received unexpected message type when processing link");
653 r
= sd_rtnl_message_link_get_ifindex(message
, &ifindex
);
655 log_warning_errno(r
, "rtnl: Could not get ifindex from link: %m");
657 } else if (ifindex
<= 0) {
658 log_warning("rtnl: received link message with invalid ifindex: %d", ifindex
);
662 r
= sd_netlink_message_read_string(message
, IFLA_IFNAME
, &name
);
664 log_warning_errno(r
, "rtnl: Received link message without ifname: %m");
668 (void) link_get(m
, ifindex
, &link
);
669 (void) netdev_get(m
, name
, &netdev
);
674 /* link is new, so add it */
675 r
= link_add(m
, message
, &link
);
677 log_warning_errno(r
, "Could not add new link: %m");
683 /* netdev exists, so make sure the ifindex matches */
684 r
= netdev_set_ifindex(netdev
, message
);
686 log_warning_errno(r
, "Could not set ifindex on netdev: %m");
691 r
= link_update(link
, message
);
704 assert_not_reached("Received invalid RTNL message type.");
710 static int systemd_netlink_fd(void) {
711 int n
, fd
, rtnl_fd
= -EINVAL
;
713 n
= sd_listen_fds(true);
717 for (fd
= SD_LISTEN_FDS_START
; fd
< SD_LISTEN_FDS_START
+ n
; fd
++) {
718 if (sd_is_socket(fd
, AF_NETLINK
, SOCK_RAW
, -1) > 0) {
729 static int manager_connect_rtnl(Manager
*m
) {
734 fd
= systemd_netlink_fd();
736 r
= sd_netlink_open(&m
->rtnl
);
738 r
= sd_netlink_open_fd(&m
->rtnl
, fd
);
742 r
= sd_netlink_inc_rcvbuf(m
->rtnl
, RCVBUF_SIZE
);
746 r
= sd_netlink_attach_event(m
->rtnl
, m
->event
, 0);
750 r
= sd_netlink_add_match(m
->rtnl
, RTM_NEWLINK
, &manager_rtnl_process_link
, m
);
754 r
= sd_netlink_add_match(m
->rtnl
, RTM_DELLINK
, &manager_rtnl_process_link
, m
);
758 r
= sd_netlink_add_match(m
->rtnl
, RTM_NEWADDR
, &manager_rtnl_process_address
, m
);
762 r
= sd_netlink_add_match(m
->rtnl
, RTM_DELADDR
, &manager_rtnl_process_address
, m
);
766 r
= sd_netlink_add_match(m
->rtnl
, RTM_NEWROUTE
, &manager_rtnl_process_route
, m
);
770 r
= sd_netlink_add_match(m
->rtnl
, RTM_DELROUTE
, &manager_rtnl_process_route
, m
);
777 static int ordered_set_put_in_addr(OrderedSet
*s
, const struct in_addr
*address
) {
783 r
= in_addr_to_string(AF_INET
, (const union in_addr_union
*) address
, &p
);
787 r
= ordered_set_consume(s
, p
);
794 static int ordered_set_put_in_addrv(OrderedSet
*s
, const struct in_addr
*addresses
, int n
) {
798 assert(n
<= 0 || addresses
);
800 for (i
= 0; i
< n
; i
++) {
801 r
= ordered_set_put_in_addr(s
, addresses
+i
);
811 static void print_string_set(FILE *f
, const char *field
, OrderedSet
*s
) {
816 if (ordered_set_isempty(s
))
821 ORDERED_SET_FOREACH(p
, s
, i
)
822 fputs_with_space(f
, p
, NULL
, &space
);
827 static int manager_save(Manager
*m
) {
828 _cleanup_ordered_set_free_free_ OrderedSet
*dns
= NULL
, *ntp
= NULL
, *search_domains
= NULL
, *route_domains
= NULL
;
831 _cleanup_free_
char *temp_path
= NULL
;
832 _cleanup_fclose_
FILE *f
= NULL
;
833 LinkOperationalState operstate
= LINK_OPERSTATE_OFF
;
834 const char *operstate_str
;
838 assert(m
->state_file
);
840 /* We add all NTP and DNS server to a set, to filter out duplicates */
841 dns
= ordered_set_new(&string_hash_ops
);
845 ntp
= ordered_set_new(&string_hash_ops
);
849 search_domains
= ordered_set_new(&dns_name_hash_ops
);
853 route_domains
= ordered_set_new(&dns_name_hash_ops
);
857 HASHMAP_FOREACH(link
, m
->links
, i
) {
858 if (link
->flags
& IFF_LOOPBACK
)
861 if (link
->operstate
> operstate
)
862 operstate
= link
->operstate
;
867 /* First add the static configured entries */
868 r
= ordered_set_put_strdupv(dns
, link
->network
->dns
);
872 r
= ordered_set_put_strdupv(ntp
, link
->network
->ntp
);
876 r
= ordered_set_put_strdupv(search_domains
, link
->network
->search_domains
);
880 r
= ordered_set_put_strdupv(route_domains
, link
->network
->route_domains
);
884 if (!link
->dhcp_lease
)
887 /* Secondly, add the entries acquired via DHCP */
888 if (link
->network
->dhcp_use_dns
) {
889 const struct in_addr
*addresses
;
891 r
= sd_dhcp_lease_get_dns(link
->dhcp_lease
, &addresses
);
893 r
= ordered_set_put_in_addrv(dns
, addresses
, r
);
896 } else if (r
< 0 && r
!= -ENODATA
)
900 if (link
->network
->dhcp_use_ntp
) {
901 const struct in_addr
*addresses
;
903 r
= sd_dhcp_lease_get_ntp(link
->dhcp_lease
, &addresses
);
905 r
= ordered_set_put_in_addrv(ntp
, addresses
, r
);
908 } else if (r
< 0 && r
!= -ENODATA
)
912 if (link
->network
->dhcp_use_domains
!= DHCP_USE_DOMAINS_NO
) {
913 const char *domainname
;
915 r
= sd_dhcp_lease_get_domainname(link
->dhcp_lease
, &domainname
);
918 if (link
->network
->dhcp_use_domains
== DHCP_USE_DOMAINS_YES
)
919 r
= ordered_set_put_strdup(search_domains
, domainname
);
921 r
= ordered_set_put_strdup(route_domains
, domainname
);
925 } else if (r
!= -ENODATA
)
930 operstate_str
= link_operstate_to_string(operstate
);
931 assert(operstate_str
);
933 r
= fopen_temporary(m
->state_file
, &f
, &temp_path
);
937 fchmod(fileno(f
), 0644);
940 "# This is private data. Do not parse.\n"
941 "OPER_STATE=%s\n", operstate_str
);
943 print_string_set(f
, "DNS=", dns
);
944 print_string_set(f
, "NTP=", ntp
);
945 print_string_set(f
, "DOMAINS=", search_domains
);
946 print_string_set(f
, "ROUTE_DOMAINS=", route_domains
);
948 r
= fflush_and_check(f
);
952 if (rename(temp_path
, m
->state_file
) < 0) {
957 if (m
->operational_state
!= operstate
) {
958 m
->operational_state
= operstate
;
959 r
= manager_send_changed(m
, "OperationalState", NULL
);
961 log_error_errno(r
, "Could not emit changed OperationalState: %m");
969 (void) unlink(m
->state_file
);
970 (void) unlink(temp_path
);
972 return log_error_errno(r
, "Failed to save network state to %s: %m", m
->state_file
);
975 static int manager_dirty_handler(sd_event_source
*s
, void *userdata
) {
976 Manager
*m
= userdata
;
986 SET_FOREACH(link
, m
->dirty_links
, i
) {
995 int manager_new(Manager
**ret
) {
996 _cleanup_manager_free_ Manager
*m
= NULL
;
999 m
= new0(Manager
, 1);
1003 m
->state_file
= strdup("/run/systemd/netif/state");
1007 r
= sd_event_default(&m
->event
);
1011 sd_event_set_watchdog(m
->event
, true);
1013 sd_event_add_signal(m
->event
, NULL
, SIGTERM
, NULL
, NULL
);
1014 sd_event_add_signal(m
->event
, NULL
, SIGINT
, NULL
, NULL
);
1016 r
= sd_event_add_post(m
->event
, NULL
, manager_dirty_handler
, m
);
1020 r
= manager_connect_rtnl(m
);
1024 r
= manager_connect_udev(m
);
1028 m
->netdevs
= hashmap_new(&string_hash_ops
);
1032 LIST_HEAD_INIT(m
->networks
);
1034 r
= setup_default_address_pool(m
);
1038 m
->duid
.type
= DUID_TYPE_EN
;
1046 void manager_free(Manager
*m
) {
1055 free(m
->state_file
);
1057 while ((link
= hashmap_first(m
->links
)))
1059 hashmap_free(m
->links
);
1061 while ((network
= m
->networks
))
1062 network_free(network
);
1064 hashmap_free(m
->networks_by_name
);
1066 while ((netdev
= hashmap_first(m
->netdevs
)))
1067 netdev_unref(netdev
);
1068 hashmap_free(m
->netdevs
);
1070 while ((pool
= m
->address_pools
))
1071 address_pool_free(pool
);
1073 sd_netlink_unref(m
->rtnl
);
1074 sd_event_unref(m
->event
);
1076 sd_event_source_unref(m
->udev_event_source
);
1077 udev_monitor_unref(m
->udev_monitor
);
1078 udev_unref(m
->udev
);
1080 sd_bus_unref(m
->bus
);
1081 sd_bus_slot_unref(m
->prepare_for_sleep_slot
);
1082 sd_event_source_unref(m
->bus_retry_event_source
);
1087 static bool manager_check_idle(void *userdata
) {
1088 Manager
*m
= userdata
;
1094 /* Check whether we are idle now. The only case when we decide to be idle is when there's only a loopback
1095 * device around, for which we have no configuration, and which already left the PENDING state. In all other
1096 * cases we are not idle. */
1098 HASHMAP_FOREACH(link
, m
->links
, i
) {
1099 /* We are not woken on udev activity, so let's just wait for the pending udev event */
1100 if (link
->state
== LINK_STATE_PENDING
)
1103 if ((link
->flags
& IFF_LOOPBACK
) == 0)
1113 int manager_run(Manager
*m
) {
1119 /* The dirty handler will deal with future serialization, but the first one
1120 must be done explicitly. */
1124 HASHMAP_FOREACH(link
, m
->links
, i
)
1128 return bus_event_loop_with_idle(
1131 "org.freedesktop.network1",
1136 /* failed to connect to the bus, so we lose exit-on-idle logic,
1137 this should not happen except if dbus is not around at all */
1138 return sd_event_loop(m
->event
);
1141 int manager_load_config(Manager
*m
) {
1144 /* update timestamp */
1145 paths_check_timestamp(network_dirs
, &m
->network_dirs_ts_usec
, true);
1151 r
= network_load(m
);
1158 bool manager_should_reload(Manager
*m
) {
1159 return paths_check_timestamp(network_dirs
, &m
->network_dirs_ts_usec
, false);
1162 int manager_rtnl_enumerate_links(Manager
*m
) {
1163 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
, *reply
= NULL
;
1164 sd_netlink_message
*link
;
1170 r
= sd_rtnl_message_new_link(m
->rtnl
, &req
, RTM_GETLINK
, 0);
1174 r
= sd_netlink_message_request_dump(req
, true);
1178 r
= sd_netlink_call(m
->rtnl
, req
, 0, &reply
);
1182 for (link
= reply
; link
; link
= sd_netlink_message_next(link
)) {
1185 m
->enumerating
= true;
1187 k
= manager_rtnl_process_link(m
->rtnl
, link
, m
);
1191 m
->enumerating
= false;
1197 int manager_rtnl_enumerate_addresses(Manager
*m
) {
1198 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
, *reply
= NULL
;
1199 sd_netlink_message
*addr
;
1205 r
= sd_rtnl_message_new_addr(m
->rtnl
, &req
, RTM_GETADDR
, 0, 0);
1209 r
= sd_netlink_message_request_dump(req
, true);
1213 r
= sd_netlink_call(m
->rtnl
, req
, 0, &reply
);
1217 for (addr
= reply
; addr
; addr
= sd_netlink_message_next(addr
)) {
1220 m
->enumerating
= true;
1222 k
= manager_rtnl_process_address(m
->rtnl
, addr
, m
);
1226 m
->enumerating
= false;
1232 int manager_rtnl_enumerate_routes(Manager
*m
) {
1233 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
, *reply
= NULL
;
1234 sd_netlink_message
*route
;
1240 r
= sd_rtnl_message_new_route(m
->rtnl
, &req
, RTM_GETROUTE
, 0, 0);
1244 r
= sd_netlink_message_request_dump(req
, true);
1248 r
= sd_netlink_call(m
->rtnl
, req
, 0, &reply
);
1252 for (route
= reply
; route
; route
= sd_netlink_message_next(route
)) {
1255 m
->enumerating
= true;
1257 k
= manager_rtnl_process_route(m
->rtnl
, route
, m
);
1261 m
->enumerating
= false;
1267 int manager_address_pool_acquire(Manager
*m
, int family
, unsigned prefixlen
, union in_addr_union
*found
) {
1272 assert(prefixlen
> 0);
1275 LIST_FOREACH(address_pools
, p
, m
->address_pools
) {
1276 if (p
->family
!= family
)
1279 r
= address_pool_acquire(p
, prefixlen
, found
);
1287 Link
* manager_find_uplink(Manager
*m
, Link
*exclude
) {
1288 _cleanup_free_
struct local_address
*gateways
= NULL
;
1293 /* Looks for a suitable "uplink", via black magic: an
1294 * interface that is up and where the default route with the
1295 * highest priority points to. */
1297 n
= local_gateways(m
->rtnl
, 0, AF_UNSPEC
, &gateways
);
1299 log_warning_errno(n
, "Failed to determine list of default gateways: %m");
1303 for (i
= 0; i
< n
; i
++) {
1306 link
= hashmap_get(m
->links
, INT_TO_PTR(gateways
[i
].ifindex
));
1308 log_debug("Weird, found a gateway for a link we don't know. Ignoring.");
1312 if (link
== exclude
)
1315 if (link
->operstate
< LINK_OPERSTATE_ROUTABLE
)
1324 void manager_dirty(Manager
*manager
) {
1327 /* the serialized state in /run is no longer up-to-date */
1328 manager
->dirty
= true;