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
);
466 assert_not_reached("Received invalid RTNL message type");
472 int manager_rtnl_process_address(sd_netlink
*rtnl
, sd_netlink_message
*message
, void *userdata
) {
473 Manager
*m
= userdata
;
478 unsigned char prefixlen
;
480 union in_addr_union in_addr
;
481 struct ifa_cacheinfo cinfo
;
482 Address
*address
= NULL
;
483 char buf
[INET6_ADDRSTRLEN
], valid_buf
[FORMAT_TIMESPAN_MAX
];
484 const char *valid_str
= NULL
;
491 if (sd_netlink_message_is_error(message
)) {
492 r
= sd_netlink_message_get_errno(message
);
494 log_warning_errno(r
, "rtnl: failed to receive address: %m");
499 r
= sd_netlink_message_get_type(message
, &type
);
501 log_warning_errno(r
, "rtnl: could not get message type: %m");
503 } else if (type
!= RTM_NEWADDR
&& type
!= RTM_DELADDR
) {
504 log_warning("rtnl: received unexpected message type when processing address");
508 r
= sd_rtnl_message_addr_get_ifindex(message
, &ifindex
);
510 log_warning_errno(r
, "rtnl: could not get ifindex from address: %m");
512 } else if (ifindex
<= 0) {
513 log_warning("rtnl: received address message with invalid ifindex: %d", ifindex
);
516 r
= link_get(m
, ifindex
, &link
);
517 if (r
< 0 || !link
) {
518 /* when enumerating we might be out of sync, but we will
519 * get the address again, so just ignore it */
521 log_warning("rtnl: received address for nonexistent link (%d), ignoring", ifindex
);
526 r
= sd_rtnl_message_addr_get_family(message
, &family
);
527 if (r
< 0 || !IN_SET(family
, AF_INET
, AF_INET6
)) {
528 log_link_warning(link
, "rtnl: received address with invalid family, ignoring.");
532 r
= sd_rtnl_message_addr_get_prefixlen(message
, &prefixlen
);
534 log_link_warning_errno(link
, r
, "rtnl: received address with invalid prefixlen, ignoring: %m");
538 r
= sd_rtnl_message_addr_get_scope(message
, &scope
);
540 log_link_warning_errno(link
, r
, "rtnl: received address with invalid scope, ignoring: %m");
544 r
= sd_rtnl_message_addr_get_flags(message
, &flags
);
546 log_link_warning_errno(link
, r
, "rtnl: received address with invalid flags, ignoring: %m");
552 r
= sd_netlink_message_read_in_addr(message
, IFA_LOCAL
, &in_addr
.in
);
554 log_link_warning_errno(link
, r
, "rtnl: received address without valid address, ignoring: %m");
561 r
= sd_netlink_message_read_in6_addr(message
, IFA_ADDRESS
, &in_addr
.in6
);
563 log_link_warning_errno(link
, r
, "rtnl: received address without valid address, ignoring: %m");
570 log_link_debug(link
, "rtnl: ignoring unsupported address family: %d", family
);
573 if (!inet_ntop(family
, &in_addr
, buf
, INET6_ADDRSTRLEN
)) {
574 log_link_warning(link
, "Could not print address");
578 r
= sd_netlink_message_read_cache_info(message
, IFA_CACHEINFO
, &cinfo
);
580 if (cinfo
.ifa_valid
!= CACHE_INFO_INFINITY_LIFE_TIME
)
581 valid_str
= format_timespan(valid_buf
, FORMAT_TIMESPAN_MAX
,
582 cinfo
.ifa_valid
* USEC_PER_SEC
,
586 address_get(link
, family
, &in_addr
, prefixlen
, &address
);
591 log_link_debug(link
, "Updating address: %s/%u (valid %s%s)", buf
, prefixlen
,
592 valid_str
? "for " : "forever", valid_str
?: "");
594 /* An address appeared that we did not request */
595 r
= address_add_foreign(link
, family
, &in_addr
, prefixlen
, &address
);
597 log_link_warning_errno(link
, r
, "Failed to add address %s/%u: %m", buf
, prefixlen
);
600 log_link_debug(link
, "Adding address: %s/%u (valid %s%s)", buf
, prefixlen
,
601 valid_str
? "for " : "forever", valid_str
?: "");
604 address_update(address
, flags
, scope
, &cinfo
);
611 log_link_debug(link
, "Removing address: %s/%u (valid %s%s)", buf
, prefixlen
,
612 valid_str
? "for " : "forever", valid_str
?: "");
613 address_drop(address
);
615 log_link_warning(link
, "Removing non-existent address: %s/%u (valid %s%s)", buf
, prefixlen
,
616 valid_str
? "for " : "forever", valid_str
?: "");
620 assert_not_reached("Received invalid RTNL message type");
626 static int manager_rtnl_process_link(sd_netlink
*rtnl
, sd_netlink_message
*message
, void *userdata
) {
627 Manager
*m
= userdata
;
629 NetDev
*netdev
= NULL
;
638 if (sd_netlink_message_is_error(message
)) {
639 r
= sd_netlink_message_get_errno(message
);
641 log_warning_errno(r
, "rtnl: Could not receive link: %m");
646 r
= sd_netlink_message_get_type(message
, &type
);
648 log_warning_errno(r
, "rtnl: Could not get message type: %m");
650 } else if (type
!= RTM_NEWLINK
&& type
!= RTM_DELLINK
) {
651 log_warning("rtnl: Received unexpected message type when processing link");
655 r
= sd_rtnl_message_link_get_ifindex(message
, &ifindex
);
657 log_warning_errno(r
, "rtnl: Could not get ifindex from link: %m");
659 } else if (ifindex
<= 0) {
660 log_warning("rtnl: received link message with invalid ifindex: %d", ifindex
);
664 r
= sd_netlink_message_read_string(message
, IFLA_IFNAME
, &name
);
666 log_warning_errno(r
, "rtnl: Received link message without ifname: %m");
670 (void) link_get(m
, ifindex
, &link
);
671 (void) netdev_get(m
, name
, &netdev
);
676 /* link is new, so add it */
677 r
= link_add(m
, message
, &link
);
679 log_warning_errno(r
, "Could not add new link: %m");
685 /* netdev exists, so make sure the ifindex matches */
686 r
= netdev_set_ifindex(netdev
, message
);
688 log_warning_errno(r
, "Could not set ifindex on netdev: %m");
693 r
= link_update(link
, message
);
706 assert_not_reached("Received invalid RTNL message type.");
712 static int systemd_netlink_fd(void) {
713 int n
, fd
, rtnl_fd
= -EINVAL
;
715 n
= sd_listen_fds(true);
719 for (fd
= SD_LISTEN_FDS_START
; fd
< SD_LISTEN_FDS_START
+ n
; fd
++) {
720 if (sd_is_socket(fd
, AF_NETLINK
, SOCK_RAW
, -1) > 0) {
731 static int manager_connect_rtnl(Manager
*m
) {
736 fd
= systemd_netlink_fd();
738 r
= sd_netlink_open(&m
->rtnl
);
740 r
= sd_netlink_open_fd(&m
->rtnl
, fd
);
744 r
= sd_netlink_inc_rcvbuf(m
->rtnl
, RCVBUF_SIZE
);
748 r
= sd_netlink_attach_event(m
->rtnl
, m
->event
, 0);
752 r
= sd_netlink_add_match(m
->rtnl
, RTM_NEWLINK
, &manager_rtnl_process_link
, m
);
756 r
= sd_netlink_add_match(m
->rtnl
, RTM_DELLINK
, &manager_rtnl_process_link
, m
);
760 r
= sd_netlink_add_match(m
->rtnl
, RTM_NEWADDR
, &manager_rtnl_process_address
, m
);
764 r
= sd_netlink_add_match(m
->rtnl
, RTM_DELADDR
, &manager_rtnl_process_address
, m
);
768 r
= sd_netlink_add_match(m
->rtnl
, RTM_NEWROUTE
, &manager_rtnl_process_route
, m
);
772 r
= sd_netlink_add_match(m
->rtnl
, RTM_DELROUTE
, &manager_rtnl_process_route
, m
);
779 static int ordered_set_put_in_addr(OrderedSet
*s
, const struct in_addr
*address
) {
785 r
= in_addr_to_string(AF_INET
, (const union in_addr_union
*) address
, &p
);
789 r
= ordered_set_consume(s
, p
);
796 static int ordered_set_put_in_addrv(OrderedSet
*s
, const struct in_addr
*addresses
, int n
) {
800 assert(n
<= 0 || addresses
);
802 for (i
= 0; i
< n
; i
++) {
803 r
= ordered_set_put_in_addr(s
, addresses
+i
);
813 static void print_string_set(FILE *f
, const char *field
, OrderedSet
*s
) {
818 if (ordered_set_isempty(s
))
823 ORDERED_SET_FOREACH(p
, s
, i
)
824 fputs_with_space(f
, p
, NULL
, &space
);
829 static int manager_save(Manager
*m
) {
830 _cleanup_ordered_set_free_free_ OrderedSet
*dns
= NULL
, *ntp
= NULL
, *search_domains
= NULL
, *route_domains
= NULL
;
833 _cleanup_free_
char *temp_path
= NULL
;
834 _cleanup_fclose_
FILE *f
= NULL
;
835 LinkOperationalState operstate
= LINK_OPERSTATE_OFF
;
836 const char *operstate_str
;
840 assert(m
->state_file
);
842 /* We add all NTP and DNS server to a set, to filter out duplicates */
843 dns
= ordered_set_new(&string_hash_ops
);
847 ntp
= ordered_set_new(&string_hash_ops
);
851 search_domains
= ordered_set_new(&dns_name_hash_ops
);
855 route_domains
= ordered_set_new(&dns_name_hash_ops
);
859 HASHMAP_FOREACH(link
, m
->links
, i
) {
860 if (link
->flags
& IFF_LOOPBACK
)
863 if (link
->operstate
> operstate
)
864 operstate
= link
->operstate
;
869 /* First add the static configured entries */
870 r
= ordered_set_put_strdupv(dns
, link
->network
->dns
);
874 r
= ordered_set_put_strdupv(ntp
, link
->network
->ntp
);
878 r
= ordered_set_put_strdupv(search_domains
, link
->network
->search_domains
);
882 r
= ordered_set_put_strdupv(route_domains
, link
->network
->route_domains
);
886 if (!link
->dhcp_lease
)
889 /* Secondly, add the entries acquired via DHCP */
890 if (link
->network
->dhcp_use_dns
) {
891 const struct in_addr
*addresses
;
893 r
= sd_dhcp_lease_get_dns(link
->dhcp_lease
, &addresses
);
895 r
= ordered_set_put_in_addrv(dns
, addresses
, r
);
898 } else if (r
< 0 && r
!= -ENODATA
)
902 if (link
->network
->dhcp_use_ntp
) {
903 const struct in_addr
*addresses
;
905 r
= sd_dhcp_lease_get_ntp(link
->dhcp_lease
, &addresses
);
907 r
= ordered_set_put_in_addrv(ntp
, addresses
, r
);
910 } else if (r
< 0 && r
!= -ENODATA
)
914 if (link
->network
->dhcp_use_domains
!= DHCP_USE_DOMAINS_NO
) {
915 const char *domainname
;
917 r
= sd_dhcp_lease_get_domainname(link
->dhcp_lease
, &domainname
);
920 if (link
->network
->dhcp_use_domains
== DHCP_USE_DOMAINS_YES
)
921 r
= ordered_set_put_strdup(search_domains
, domainname
);
923 r
= ordered_set_put_strdup(route_domains
, domainname
);
927 } else if (r
!= -ENODATA
)
932 operstate_str
= link_operstate_to_string(operstate
);
933 assert(operstate_str
);
935 r
= fopen_temporary(m
->state_file
, &f
, &temp_path
);
939 fchmod(fileno(f
), 0644);
942 "# This is private data. Do not parse.\n"
943 "OPER_STATE=%s\n", operstate_str
);
945 print_string_set(f
, "DNS=", dns
);
946 print_string_set(f
, "NTP=", ntp
);
947 print_string_set(f
, "DOMAINS=", search_domains
);
948 print_string_set(f
, "ROUTE_DOMAINS=", route_domains
);
950 r
= fflush_and_check(f
);
954 if (rename(temp_path
, m
->state_file
) < 0) {
959 if (m
->operational_state
!= operstate
) {
960 m
->operational_state
= operstate
;
961 r
= manager_send_changed(m
, "OperationalState", NULL
);
963 log_error_errno(r
, "Could not emit changed OperationalState: %m");
971 (void) unlink(m
->state_file
);
972 (void) unlink(temp_path
);
974 return log_error_errno(r
, "Failed to save network state to %s: %m", m
->state_file
);
977 static int manager_dirty_handler(sd_event_source
*s
, void *userdata
) {
978 Manager
*m
= userdata
;
988 SET_FOREACH(link
, m
->dirty_links
, i
) {
997 int manager_new(Manager
**ret
) {
998 _cleanup_manager_free_ Manager
*m
= NULL
;
1001 m
= new0(Manager
, 1);
1005 m
->state_file
= strdup("/run/systemd/netif/state");
1009 r
= sd_event_default(&m
->event
);
1013 sd_event_set_watchdog(m
->event
, true);
1015 sd_event_add_signal(m
->event
, NULL
, SIGTERM
, NULL
, NULL
);
1016 sd_event_add_signal(m
->event
, NULL
, SIGINT
, NULL
, NULL
);
1018 r
= sd_event_add_post(m
->event
, NULL
, manager_dirty_handler
, m
);
1022 r
= manager_connect_rtnl(m
);
1026 r
= manager_connect_udev(m
);
1030 m
->netdevs
= hashmap_new(&string_hash_ops
);
1034 LIST_HEAD_INIT(m
->networks
);
1036 r
= setup_default_address_pool(m
);
1040 m
->duid_type
= DUID_TYPE_EN
;
1048 void manager_free(Manager
*m
) {
1057 free(m
->state_file
);
1059 while ((link
= hashmap_first(m
->links
)))
1061 hashmap_free(m
->links
);
1063 while ((network
= m
->networks
))
1064 network_free(network
);
1066 hashmap_free(m
->networks_by_name
);
1068 while ((netdev
= hashmap_first(m
->netdevs
)))
1069 netdev_unref(netdev
);
1070 hashmap_free(m
->netdevs
);
1072 while ((pool
= m
->address_pools
))
1073 address_pool_free(pool
);
1075 sd_netlink_unref(m
->rtnl
);
1076 sd_event_unref(m
->event
);
1078 sd_event_source_unref(m
->udev_event_source
);
1079 udev_monitor_unref(m
->udev_monitor
);
1080 udev_unref(m
->udev
);
1082 sd_bus_unref(m
->bus
);
1083 sd_bus_slot_unref(m
->prepare_for_sleep_slot
);
1084 sd_event_source_unref(m
->bus_retry_event_source
);
1089 static bool manager_check_idle(void *userdata
) {
1090 Manager
*m
= userdata
;
1096 /* Check whether we are idle now. The only case when we decide to be idle is when there's only a loopback
1097 * device around, for which we have no configuration, and which already left the PENDING state. In all other
1098 * cases we are not idle. */
1100 HASHMAP_FOREACH(link
, m
->links
, i
) {
1101 /* We are not woken on udev activity, so let's just wait for the pending udev event */
1102 if (link
->state
== LINK_STATE_PENDING
)
1105 if ((link
->flags
& IFF_LOOPBACK
) == 0)
1115 int manager_run(Manager
*m
) {
1121 /* The dirty handler will deal with future serialization, but the first one
1122 must be done explicitly. */
1126 HASHMAP_FOREACH(link
, m
->links
, i
)
1130 return bus_event_loop_with_idle(
1133 "org.freedesktop.network1",
1138 /* failed to connect to the bus, so we lose exit-on-idle logic,
1139 this should not happen except if dbus is not around at all */
1140 return sd_event_loop(m
->event
);
1143 int manager_load_config(Manager
*m
) {
1146 /* update timestamp */
1147 paths_check_timestamp(network_dirs
, &m
->network_dirs_ts_usec
, true);
1153 r
= network_load(m
);
1160 bool manager_should_reload(Manager
*m
) {
1161 return paths_check_timestamp(network_dirs
, &m
->network_dirs_ts_usec
, false);
1164 int manager_rtnl_enumerate_links(Manager
*m
) {
1165 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
, *reply
= NULL
;
1166 sd_netlink_message
*link
;
1172 r
= sd_rtnl_message_new_link(m
->rtnl
, &req
, RTM_GETLINK
, 0);
1176 r
= sd_netlink_message_request_dump(req
, true);
1180 r
= sd_netlink_call(m
->rtnl
, req
, 0, &reply
);
1184 for (link
= reply
; link
; link
= sd_netlink_message_next(link
)) {
1187 m
->enumerating
= true;
1189 k
= manager_rtnl_process_link(m
->rtnl
, link
, m
);
1193 m
->enumerating
= false;
1199 int manager_rtnl_enumerate_addresses(Manager
*m
) {
1200 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
, *reply
= NULL
;
1201 sd_netlink_message
*addr
;
1207 r
= sd_rtnl_message_new_addr(m
->rtnl
, &req
, RTM_GETADDR
, 0, 0);
1211 r
= sd_netlink_message_request_dump(req
, true);
1215 r
= sd_netlink_call(m
->rtnl
, req
, 0, &reply
);
1219 for (addr
= reply
; addr
; addr
= sd_netlink_message_next(addr
)) {
1222 m
->enumerating
= true;
1224 k
= manager_rtnl_process_address(m
->rtnl
, addr
, m
);
1228 m
->enumerating
= false;
1234 int manager_rtnl_enumerate_routes(Manager
*m
) {
1235 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
, *reply
= NULL
;
1236 sd_netlink_message
*route
;
1242 r
= sd_rtnl_message_new_route(m
->rtnl
, &req
, RTM_GETROUTE
, 0, 0);
1246 r
= sd_netlink_message_request_dump(req
, true);
1250 r
= sd_netlink_call(m
->rtnl
, req
, 0, &reply
);
1254 for (route
= reply
; route
; route
= sd_netlink_message_next(route
)) {
1257 m
->enumerating
= true;
1259 k
= manager_rtnl_process_route(m
->rtnl
, route
, m
);
1263 m
->enumerating
= false;
1269 int manager_address_pool_acquire(Manager
*m
, int family
, unsigned prefixlen
, union in_addr_union
*found
) {
1274 assert(prefixlen
> 0);
1277 LIST_FOREACH(address_pools
, p
, m
->address_pools
) {
1278 if (p
->family
!= family
)
1281 r
= address_pool_acquire(p
, prefixlen
, found
);
1289 Link
* manager_find_uplink(Manager
*m
, Link
*exclude
) {
1290 _cleanup_free_
struct local_address
*gateways
= NULL
;
1295 /* Looks for a suitable "uplink", via black magic: an
1296 * interface that is up and where the default route with the
1297 * highest priority points to. */
1299 n
= local_gateways(m
->rtnl
, 0, AF_UNSPEC
, &gateways
);
1301 log_warning_errno(n
, "Failed to determine list of default gateways: %m");
1305 for (i
= 0; i
< n
; i
++) {
1308 link
= hashmap_get(m
->links
, INT_TO_PTR(gateways
[i
].ifindex
));
1310 log_debug("Weird, found a gateway for a link we don't know. Ignoring.");
1314 if (link
== exclude
)
1317 if (link
->operstate
< LINK_OPERSTATE_ROUTABLE
)
1326 void manager_dirty(Manager
*manager
) {
1329 /* the serialized state in /run is no longer up-to-date */
1330 manager
->dirty
= true;