1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 This file is part of systemd.
5 Copyright 2013 Tom Gundersen <teg@jklm.no>
8 #include <netinet/ether.h>
11 #include <stdio_ext.h>
13 #include "alloc-util.h"
15 #include "dhcp-lease-internal.h"
18 #include "netlink-util.h"
19 #include "network-internal.h"
20 #include "networkd-ipv6-proxy-ndp.h"
21 #include "networkd-lldp-tx.h"
22 #include "networkd-manager.h"
23 #include "networkd-ndisc.h"
24 #include "networkd-radv.h"
25 #include "networkd-routing-policy-rule.h"
27 #include "socket-util.h"
28 #include "stdio-util.h"
29 #include "string-table.h"
30 #include "udev-util.h"
34 static bool link_dhcp6_enabled(Link
*link
) {
37 if (!socket_ipv6_is_supported())
40 if (link
->flags
& IFF_LOOPBACK
)
46 return link
->network
->dhcp
& ADDRESS_FAMILY_IPV6
;
49 static bool link_dhcp4_enabled(Link
*link
) {
52 if (link
->flags
& IFF_LOOPBACK
)
58 return link
->network
->dhcp
& ADDRESS_FAMILY_IPV4
;
61 static bool link_dhcp4_server_enabled(Link
*link
) {
64 if (link
->flags
& IFF_LOOPBACK
)
70 return link
->network
->dhcp_server
;
73 static bool link_ipv4ll_enabled(Link
*link
) {
76 if (link
->flags
& IFF_LOOPBACK
)
82 if (streq_ptr(link
->kind
, "wireguard"))
85 return link
->network
->link_local
& ADDRESS_FAMILY_IPV4
;
88 static bool link_ipv6ll_enabled(Link
*link
) {
91 if (!socket_ipv6_is_supported())
94 if (link
->flags
& IFF_LOOPBACK
)
100 if (streq_ptr(link
->kind
, "wireguard"))
103 return link
->network
->link_local
& ADDRESS_FAMILY_IPV6
;
106 static bool link_ipv6_enabled(Link
*link
) {
109 if (!socket_ipv6_is_supported())
112 if (link
->network
->bridge
)
115 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
116 return link_ipv6ll_enabled(link
) || network_has_static_ipv6_addresses(link
->network
);
119 static bool link_radv_enabled(Link
*link
) {
122 if (!link_ipv6ll_enabled(link
))
125 return link
->network
->router_prefix_delegation
!= RADV_PREFIX_DELEGATION_NONE
;
128 static bool link_lldp_rx_enabled(Link
*link
) {
131 if (link
->flags
& IFF_LOOPBACK
)
134 if (link
->iftype
!= ARPHRD_ETHER
)
140 /* LLDP should be handled on bridge slaves as those have a direct
141 * connection to their peers not on the bridge master. Linux doesn't
142 * even (by default) forward lldp packets to the bridge master.*/
143 if (streq_ptr("bridge", link
->kind
))
146 return link
->network
->lldp_mode
!= LLDP_MODE_NO
;
149 static bool link_lldp_emit_enabled(Link
*link
) {
152 if (link
->flags
& IFF_LOOPBACK
)
155 if (link
->iftype
!= ARPHRD_ETHER
)
161 return link
->network
->lldp_emit
!= LLDP_EMIT_NO
;
164 static bool link_ipv4_forward_enabled(Link
*link
) {
167 if (link
->flags
& IFF_LOOPBACK
)
173 if (link
->network
->ip_forward
== _ADDRESS_FAMILY_BOOLEAN_INVALID
)
176 return link
->network
->ip_forward
& ADDRESS_FAMILY_IPV4
;
179 static bool link_ipv6_forward_enabled(Link
*link
) {
182 if (!socket_ipv6_is_supported())
185 if (link
->flags
& IFF_LOOPBACK
)
191 if (link
->network
->ip_forward
== _ADDRESS_FAMILY_BOOLEAN_INVALID
)
194 return link
->network
->ip_forward
& ADDRESS_FAMILY_IPV6
;
197 static bool link_proxy_arp_enabled(Link
*link
) {
200 if (link
->flags
& IFF_LOOPBACK
)
206 if (link
->network
->proxy_arp
< 0)
212 static bool link_ipv6_accept_ra_enabled(Link
*link
) {
215 if (!socket_ipv6_is_supported())
218 if (link
->flags
& IFF_LOOPBACK
)
224 if (!link_ipv6ll_enabled(link
))
227 /* If unset use system default (enabled if local forwarding is disabled.
228 * disabled if local forwarding is enabled).
229 * If set, ignore or enforce RA independent of local forwarding state.
231 if (link
->network
->ipv6_accept_ra
< 0)
232 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
233 return !link_ipv6_forward_enabled(link
);
234 else if (link
->network
->ipv6_accept_ra
> 0)
235 /* accept RA even if ip_forward is enabled */
242 static IPv6PrivacyExtensions
link_ipv6_privacy_extensions(Link
*link
) {
245 if (!socket_ipv6_is_supported())
246 return _IPV6_PRIVACY_EXTENSIONS_INVALID
;
248 if (link
->flags
& IFF_LOOPBACK
)
249 return _IPV6_PRIVACY_EXTENSIONS_INVALID
;
252 return _IPV6_PRIVACY_EXTENSIONS_INVALID
;
254 return link
->network
->ipv6_privacy_extensions
;
257 static int link_enable_ipv6(Link
*link
) {
258 const char *p
= NULL
;
262 if (link
->flags
& IFF_LOOPBACK
)
265 disabled
= !link_ipv6_enabled(link
);
267 p
= strjoina("/proc/sys/net/ipv6/conf/", link
->ifname
, "/disable_ipv6");
269 r
= write_string_file(p
, one_zero(disabled
), WRITE_STRING_FILE_VERIFY_ON_FAILURE
);
271 log_link_warning_errno(link
, r
, "Cannot %s IPv6 for interface %s: %m",
272 enable_disable(!disabled
), link
->ifname
);
274 log_link_info(link
, "IPv6 successfully %sd", enable_disable(!disabled
));
279 void link_update_operstate(Link
*link
) {
280 LinkOperationalState operstate
;
283 if (link
->kernel_operstate
== IF_OPER_DORMANT
)
284 operstate
= LINK_OPERSTATE_DORMANT
;
285 else if (link_has_carrier(link
)) {
287 uint8_t scope
= RT_SCOPE_NOWHERE
;
290 /* if we have carrier, check what addresses we have */
291 SET_FOREACH(address
, link
->addresses
, i
) {
292 if (!address_is_ready(address
))
295 if (address
->scope
< scope
)
296 scope
= address
->scope
;
299 /* for operstate we also take foreign addresses into account */
300 SET_FOREACH(address
, link
->addresses_foreign
, i
) {
301 if (!address_is_ready(address
))
304 if (address
->scope
< scope
)
305 scope
= address
->scope
;
308 if (scope
< RT_SCOPE_SITE
)
309 /* universally accessible addresses found */
310 operstate
= LINK_OPERSTATE_ROUTABLE
;
311 else if (scope
< RT_SCOPE_HOST
)
312 /* only link or site local addresses found */
313 operstate
= LINK_OPERSTATE_DEGRADED
;
315 /* no useful addresses found */
316 operstate
= LINK_OPERSTATE_CARRIER
;
317 } else if (link
->flags
& IFF_UP
)
318 operstate
= LINK_OPERSTATE_NO_CARRIER
;
320 operstate
= LINK_OPERSTATE_OFF
;
322 if (link
->operstate
!= operstate
) {
323 link
->operstate
= operstate
;
324 link_send_changed(link
, "OperationalState", NULL
);
329 #define FLAG_STRING(string, flag, old, new) \
330 (((old ^ new) & flag) \
331 ? ((old & flag) ? (" -" string) : (" +" string)) \
334 static int link_update_flags(Link
*link
, sd_netlink_message
*m
) {
335 unsigned flags
, unknown_flags_added
, unknown_flags_removed
, unknown_flags
;
341 r
= sd_rtnl_message_link_get_flags(m
, &flags
);
343 return log_link_warning_errno(link
, r
, "Could not get link flags: %m");
345 r
= sd_netlink_message_read_u8(m
, IFLA_OPERSTATE
, &operstate
);
347 /* if we got a message without operstate, take it to mean
348 the state was unchanged */
349 operstate
= link
->kernel_operstate
;
351 if ((link
->flags
== flags
) && (link
->kernel_operstate
== operstate
))
354 if (link
->flags
!= flags
) {
355 log_link_debug(link
, "Flags change:%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
356 FLAG_STRING("LOOPBACK", IFF_LOOPBACK
, link
->flags
, flags
),
357 FLAG_STRING("MASTER", IFF_MASTER
, link
->flags
, flags
),
358 FLAG_STRING("SLAVE", IFF_SLAVE
, link
->flags
, flags
),
359 FLAG_STRING("UP", IFF_UP
, link
->flags
, flags
),
360 FLAG_STRING("DORMANT", IFF_DORMANT
, link
->flags
, flags
),
361 FLAG_STRING("LOWER_UP", IFF_LOWER_UP
, link
->flags
, flags
),
362 FLAG_STRING("RUNNING", IFF_RUNNING
, link
->flags
, flags
),
363 FLAG_STRING("MULTICAST", IFF_MULTICAST
, link
->flags
, flags
),
364 FLAG_STRING("BROADCAST", IFF_BROADCAST
, link
->flags
, flags
),
365 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT
, link
->flags
, flags
),
366 FLAG_STRING("PROMISC", IFF_PROMISC
, link
->flags
, flags
),
367 FLAG_STRING("ALLMULTI", IFF_ALLMULTI
, link
->flags
, flags
),
368 FLAG_STRING("PORTSEL", IFF_PORTSEL
, link
->flags
, flags
),
369 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA
, link
->flags
, flags
),
370 FLAG_STRING("DYNAMIC", IFF_DYNAMIC
, link
->flags
, flags
),
371 FLAG_STRING("NOARP", IFF_NOARP
, link
->flags
, flags
),
372 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS
, link
->flags
, flags
),
373 FLAG_STRING("DEBUG", IFF_DEBUG
, link
->flags
, flags
),
374 FLAG_STRING("ECHO", IFF_ECHO
, link
->flags
, flags
));
376 unknown_flags
= ~(IFF_LOOPBACK
| IFF_MASTER
| IFF_SLAVE
| IFF_UP
|
377 IFF_DORMANT
| IFF_LOWER_UP
| IFF_RUNNING
|
378 IFF_MULTICAST
| IFF_BROADCAST
| IFF_POINTOPOINT
|
379 IFF_PROMISC
| IFF_ALLMULTI
| IFF_PORTSEL
|
380 IFF_AUTOMEDIA
| IFF_DYNAMIC
| IFF_NOARP
|
381 IFF_NOTRAILERS
| IFF_DEBUG
| IFF_ECHO
);
382 unknown_flags_added
= ((link
->flags
^ flags
) & flags
& unknown_flags
);
383 unknown_flags_removed
= ((link
->flags
^ flags
) & link
->flags
& unknown_flags
);
385 /* link flags are currently at most 18 bits, let's align to
387 if (unknown_flags_added
)
389 "Unknown link flags gained: %#.5x (ignoring)",
390 unknown_flags_added
);
392 if (unknown_flags_removed
)
394 "Unknown link flags lost: %#.5x (ignoring)",
395 unknown_flags_removed
);
399 link
->kernel_operstate
= operstate
;
401 link_update_operstate(link
);
406 static int link_new(Manager
*manager
, sd_netlink_message
*message
, Link
**ret
) {
407 _cleanup_(link_unrefp
) Link
*link
= NULL
;
409 const char *ifname
, *kind
= NULL
;
411 unsigned short iftype
;
417 /* check for link kind */
418 r
= sd_netlink_message_enter_container(message
, IFLA_LINKINFO
);
420 (void)sd_netlink_message_read_string(message
, IFLA_INFO_KIND
, &kind
);
421 r
= sd_netlink_message_exit_container(message
);
426 r
= sd_netlink_message_get_type(message
, &type
);
429 else if (type
!= RTM_NEWLINK
)
432 r
= sd_rtnl_message_link_get_ifindex(message
, &ifindex
);
435 else if (ifindex
<= 0)
438 r
= sd_rtnl_message_link_get_type(message
, &iftype
);
442 r
= sd_netlink_message_read_string(message
, IFLA_IFNAME
, &ifname
);
446 link
= new0(Link
, 1);
451 link
->manager
= manager
;
452 link
->state
= LINK_STATE_PENDING
;
453 link
->rtnl_extended_attrs
= true;
454 link
->ifindex
= ifindex
;
455 link
->iftype
= iftype
;
456 link
->ifname
= strdup(ifname
);
461 link
->kind
= strdup(kind
);
466 r
= sd_netlink_message_read_ether_addr(message
, IFLA_ADDRESS
, &link
->mac
);
468 log_link_debug_errno(link
, r
, "MAC address not found for new device, continuing without");
470 if (asprintf(&link
->state_file
, "/run/systemd/netif/links/%d", link
->ifindex
) < 0)
473 if (asprintf(&link
->lease_file
, "/run/systemd/netif/leases/%d", link
->ifindex
) < 0)
476 if (asprintf(&link
->lldp_file
, "/run/systemd/netif/lldp/%d", link
->ifindex
) < 0)
479 r
= hashmap_ensure_allocated(&manager
->links
, NULL
);
483 r
= hashmap_put(manager
->links
, INT_TO_PTR(link
->ifindex
), link
);
487 r
= link_update_flags(link
, message
);
491 *ret
= TAKE_PTR(link
);
496 static void link_free(Link
*link
) {
504 while (!set_isempty(link
->addresses
))
505 address_free(set_first(link
->addresses
));
507 while (!set_isempty(link
->addresses_foreign
))
508 address_free(set_first(link
->addresses_foreign
));
510 link
->addresses
= set_free(link
->addresses
);
512 link
->addresses_foreign
= set_free(link
->addresses_foreign
);
514 while ((address
= link
->pool_addresses
)) {
515 LIST_REMOVE(addresses
, link
->pool_addresses
, address
);
516 address_free(address
);
519 sd_dhcp_server_unref(link
->dhcp_server
);
520 sd_dhcp_client_unref(link
->dhcp_client
);
521 sd_dhcp_lease_unref(link
->dhcp_lease
);
523 link_lldp_emit_stop(link
);
525 free(link
->lease_file
);
527 sd_lldp_unref(link
->lldp
);
528 free(link
->lldp_file
);
532 sd_ipv4ll_unref(link
->ipv4ll
);
533 sd_dhcp6_client_unref(link
->dhcp6_client
);
534 sd_ndisc_unref(link
->ndisc
);
535 sd_radv_unref(link
->radv
);
538 hashmap_remove(link
->manager
->links
, INT_TO_PTR(link
->ifindex
));
544 (void)unlink(link
->state_file
);
545 free(link
->state_file
);
547 udev_device_unref(link
->udev_device
);
549 HASHMAP_FOREACH (carrier
, link
->bound_to_links
, i
)
550 hashmap_remove(link
->bound_to_links
, INT_TO_PTR(carrier
->ifindex
));
551 hashmap_free(link
->bound_to_links
);
553 HASHMAP_FOREACH (carrier
, link
->bound_by_links
, i
)
554 hashmap_remove(link
->bound_by_links
, INT_TO_PTR(carrier
->ifindex
));
555 hashmap_free(link
->bound_by_links
);
560 Link
*link_unref(Link
*link
) {
564 assert(link
->n_ref
> 0);
576 Link
*link_ref(Link
*link
) {
580 assert(link
->n_ref
> 0);
587 int link_get(Manager
*m
, int ifindex
, Link
**ret
) {
594 link
= hashmap_get(m
->links
, INT_TO_PTR(ifindex
));
603 static void link_set_state(Link
*link
, LinkState state
) {
606 if (link
->state
== state
)
611 link_send_changed(link
, "AdministrativeState", NULL
);
614 static void link_enter_unmanaged(Link
*link
) {
617 log_link_debug(link
, "Unmanaged");
619 link_set_state(link
, LINK_STATE_UNMANAGED
);
624 static int link_stop_clients(Link
*link
) {
628 assert(link
->manager
);
629 assert(link
->manager
->event
);
631 if (link
->dhcp_client
) {
632 k
= sd_dhcp_client_stop(link
->dhcp_client
);
634 r
= log_link_warning_errno(link
, k
, "Could not stop DHCPv4 client: %m");
638 k
= sd_ipv4ll_stop(link
->ipv4ll
);
640 r
= log_link_warning_errno(link
, k
, "Could not stop IPv4 link-local: %m");
643 if (link
->dhcp6_client
) {
644 k
= sd_dhcp6_client_stop(link
->dhcp6_client
);
646 r
= log_link_warning_errno(link
, k
, "Could not stop DHCPv6 client: %m");
650 k
= sd_ndisc_stop(link
->ndisc
);
652 r
= log_link_warning_errno(link
, k
, "Could not stop IPv6 Router Discovery: %m");
656 k
= sd_radv_stop(link
->radv
);
658 r
= log_link_warning_errno(link
, k
, "Could not stop IPv6 Router Advertisement: %m");
661 link_lldp_emit_stop(link
);
665 void link_enter_failed(Link
*link
) {
668 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
671 log_link_warning(link
, "Failed");
673 link_set_state(link
, LINK_STATE_FAILED
);
675 link_stop_clients(link
);
680 static Address
* link_find_dhcp_server_address(Link
*link
) {
684 assert(link
->network
);
686 /* The first statically configured address if there is any */
687 LIST_FOREACH(addresses
, address
, link
->network
->static_addresses
) {
689 if (address
->family
!= AF_INET
)
692 if (in_addr_is_null(address
->family
, &address
->in_addr
))
698 /* If that didn't work, find a suitable address we got from the pool */
699 LIST_FOREACH(addresses
, address
, link
->pool_addresses
) {
700 if (address
->family
!= AF_INET
)
709 static void link_enter_configured(Link
*link
) {
711 assert(link
->network
);
713 if (link
->state
!= LINK_STATE_SETTING_ROUTES
)
716 log_link_info(link
, "Configured");
718 link_set_state(link
, LINK_STATE_CONFIGURED
);
723 void link_check_ready(Link
*link
) {
729 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
735 if (!link
->static_routes_configured
)
738 if (!link
->routing_policy_rules_configured
)
741 if (link_ipv4ll_enabled(link
))
742 if (!link
->ipv4ll_address
||
746 if (!link
->network
->bridge
) {
748 if (link_ipv6ll_enabled(link
))
749 if (in_addr_is_null(AF_INET6
, (const union in_addr_union
*) &link
->ipv6ll_address
) > 0)
752 if ((link_dhcp4_enabled(link
) && !link_dhcp6_enabled(link
) &&
753 !link
->dhcp4_configured
) ||
754 (link_dhcp6_enabled(link
) && !link_dhcp4_enabled(link
) &&
755 !link
->dhcp6_configured
) ||
756 (link_dhcp4_enabled(link
) && link_dhcp6_enabled(link
) &&
757 !link
->dhcp4_configured
&& !link
->dhcp6_configured
))
760 if (link_ipv6_accept_ra_enabled(link
) && !link
->ndisc_configured
)
764 SET_FOREACH(a
, link
->addresses
, i
)
765 if (!address_is_ready(a
))
768 if (link
->state
!= LINK_STATE_CONFIGURED
)
769 link_enter_configured(link
);
774 static int link_set_routing_policy_rule(Link
*link
) {
775 RoutingPolicyRule
*rule
, *rrule
= NULL
;
779 assert(link
->network
);
781 LIST_FOREACH(rules
, rule
, link
->network
->rules
) {
782 r
= routing_policy_rule_get(link
->manager
, rule
->family
, &rule
->from
, rule
->from_prefixlen
, &rule
->to
,
783 rule
->to_prefixlen
, rule
->tos
, rule
->fwmark
, rule
->table
, rule
->iif
, rule
->oif
, &rrule
);
785 (void) routing_policy_rule_make_local(link
->manager
, rrule
);
789 r
= routing_policy_rule_configure(rule
, link
, link_routing_policy_rule_handler
, false);
791 log_link_warning_errno(link
, r
, "Could not set routing policy rules: %m");
792 link_enter_failed(link
);
796 link
->routing_policy_rule_messages
++;
799 routing_policy_rule_purge(link
->manager
, link
);
800 if (link
->routing_policy_rule_messages
== 0) {
801 link
->routing_policy_rules_configured
= true;
802 link_check_ready(link
);
804 log_link_debug(link
, "Setting routing policy rules");
809 static int route_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
810 _cleanup_(link_unrefp
) Link
*link
= userdata
;
813 assert(link
->route_messages
> 0);
814 assert(IN_SET(link
->state
, LINK_STATE_SETTING_ADDRESSES
,
815 LINK_STATE_SETTING_ROUTES
, LINK_STATE_FAILED
,
818 link
->route_messages
--;
820 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
823 r
= sd_netlink_message_get_errno(m
);
824 if (r
< 0 && r
!= -EEXIST
)
825 log_link_warning_errno(link
, r
, "Could not set route: %m");
827 if (link
->route_messages
== 0) {
828 log_link_debug(link
, "Routes set");
829 link
->static_routes_configured
= true;
830 link_check_ready(link
);
836 static int link_enter_set_routes(Link
*link
) {
841 assert(link
->network
);
842 assert(link
->state
== LINK_STATE_SETTING_ADDRESSES
);
844 (void) link_set_routing_policy_rule(link
);
846 link_set_state(link
, LINK_STATE_SETTING_ROUTES
);
848 LIST_FOREACH(routes
, rt
, link
->network
->static_routes
) {
849 r
= route_configure(rt
, link
, route_handler
);
851 log_link_warning_errno(link
, r
, "Could not set routes: %m");
852 link_enter_failed(link
);
856 link
->route_messages
++;
859 if (link
->route_messages
== 0) {
860 link
->static_routes_configured
= true;
861 link_check_ready(link
);
863 log_link_debug(link
, "Setting routes");
868 int link_route_remove_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
869 _cleanup_(link_unrefp
) Link
*link
= userdata
;
874 assert(link
->ifname
);
876 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
879 r
= sd_netlink_message_get_errno(m
);
880 if (r
< 0 && r
!= -ESRCH
)
881 log_link_warning_errno(link
, r
, "Could not drop route: %m");
886 static int address_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
887 _cleanup_(link_unrefp
) Link
*link
= userdata
;
893 assert(link
->ifname
);
894 assert(link
->address_messages
> 0);
895 assert(IN_SET(link
->state
, LINK_STATE_SETTING_ADDRESSES
,
896 LINK_STATE_FAILED
, LINK_STATE_LINGER
));
898 link
->address_messages
--;
900 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
903 r
= sd_netlink_message_get_errno(m
);
904 if (r
< 0 && r
!= -EEXIST
)
905 log_link_warning_errno(link
, r
, "could not set address: %m");
907 manager_rtnl_process_address(rtnl
, m
, link
->manager
);
909 if (link
->address_messages
== 0) {
910 log_link_debug(link
, "Addresses set");
911 link_enter_set_routes(link
);
917 static int address_label_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
918 _cleanup_(link_unrefp
) Link
*link
= userdata
;
924 assert(link
->ifname
);
925 assert(link
->address_label_messages
> 0);
927 link
->address_label_messages
--;
929 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
932 r
= sd_netlink_message_get_errno(m
);
933 if (r
< 0 && r
!= -EEXIST
)
934 log_link_warning_errno(link
, r
, "could not set address label: %m");
936 manager_rtnl_process_address(rtnl
, m
, link
->manager
);
938 if (link
->address_label_messages
== 0)
939 log_link_debug(link
, "Addresses label set");
944 static int link_push_uplink_dns_to_dhcp_server(Link
*link
, sd_dhcp_server
*s
) {
945 _cleanup_free_
struct in_addr
*addresses
= NULL
;
946 size_t n_addresses
= 0, n_allocated
= 0;
949 log_debug("Copying DNS server information from %s", link
->ifname
);
954 for (i
= 0; i
< link
->network
->n_dns
; i
++) {
957 /* Only look for IPv4 addresses */
958 if (link
->network
->dns
[i
].family
!= AF_INET
)
961 ia
= link
->network
->dns
[i
].address
.in
;
963 /* Never propagate obviously borked data */
964 if (in4_addr_is_null(&ia
) || in4_addr_is_localhost(&ia
))
967 if (!GREEDY_REALLOC(addresses
, n_allocated
, n_addresses
+ 1))
970 addresses
[n_addresses
++] = ia
;
973 if (link
->network
->dhcp_use_dns
&& link
->dhcp_lease
) {
974 const struct in_addr
*da
= NULL
;
977 n
= sd_dhcp_lease_get_dns(link
->dhcp_lease
, &da
);
980 if (!GREEDY_REALLOC(addresses
, n_allocated
, n_addresses
+ n
))
983 memcpy(addresses
+ n_addresses
, da
, n
* sizeof(struct in_addr
));
988 if (n_addresses
<= 0)
991 return sd_dhcp_server_set_dns(s
, addresses
, n_addresses
);
994 static int link_push_uplink_ntp_to_dhcp_server(Link
*link
, sd_dhcp_server
*s
) {
995 _cleanup_free_
struct in_addr
*addresses
= NULL
;
996 size_t n_addresses
= 0, n_allocated
= 0;
1002 log_debug("Copying NTP server information from %s", link
->ifname
);
1004 STRV_FOREACH(a
, link
->network
->ntp
) {
1007 /* Only look for IPv4 addresses */
1008 if (inet_pton(AF_INET
, *a
, &ia
) <= 0)
1011 /* Never propagate obviously borked data */
1012 if (in4_addr_is_null(&ia
) || in4_addr_is_localhost(&ia
))
1015 if (!GREEDY_REALLOC(addresses
, n_allocated
, n_addresses
+ 1))
1018 addresses
[n_addresses
++] = ia
;
1021 if (link
->network
->dhcp_use_ntp
&& link
->dhcp_lease
) {
1022 const struct in_addr
*da
= NULL
;
1025 n
= sd_dhcp_lease_get_ntp(link
->dhcp_lease
, &da
);
1028 if (!GREEDY_REALLOC(addresses
, n_allocated
, n_addresses
+ n
))
1031 memcpy(addresses
+ n_addresses
, da
, n
* sizeof(struct in_addr
));
1036 if (n_addresses
<= 0)
1039 return sd_dhcp_server_set_ntp(s
, addresses
, n_addresses
);
1042 static int link_set_bridge_fdb(Link
*link
) {
1043 FdbEntry
*fdb_entry
;
1046 LIST_FOREACH(static_fdb_entries
, fdb_entry
, link
->network
->static_fdb_entries
) {
1047 r
= fdb_entry_configure(link
, fdb_entry
);
1049 return log_link_error_errno(link
, r
, "Failed to add MAC entry to static MAC table: %m");
1055 static int link_enter_set_addresses(Link
*link
) {
1056 AddressLabel
*label
;
1061 assert(link
->network
);
1062 assert(link
->state
!= _LINK_STATE_INVALID
);
1064 r
= link_set_bridge_fdb(link
);
1068 link_set_state(link
, LINK_STATE_SETTING_ADDRESSES
);
1070 LIST_FOREACH(addresses
, ad
, link
->network
->static_addresses
) {
1071 r
= address_configure(ad
, link
, address_handler
, false);
1073 log_link_warning_errno(link
, r
, "Could not set addresses: %m");
1074 link_enter_failed(link
);
1078 link
->address_messages
++;
1081 LIST_FOREACH(labels
, label
, link
->network
->address_labels
) {
1082 r
= address_label_configure(label
, link
, address_label_handler
, false);
1084 log_link_warning_errno(link
, r
, "Could not set address label: %m");
1085 link_enter_failed(link
);
1089 link
->address_label_messages
++;
1092 /* now that we can figure out a default address for the dhcp server,
1094 if (link_dhcp4_server_enabled(link
)) {
1096 Link
*uplink
= NULL
;
1097 bool acquired_uplink
= false;
1099 address
= link_find_dhcp_server_address(link
);
1101 log_link_warning(link
, "Failed to find suitable address for DHCPv4 server instance.");
1102 link_enter_failed(link
);
1106 /* use the server address' subnet as the pool */
1107 r
= sd_dhcp_server_configure_pool(link
->dhcp_server
, &address
->in_addr
.in
, address
->prefixlen
,
1108 link
->network
->dhcp_server_pool_offset
, link
->network
->dhcp_server_pool_size
);
1113 r = sd_dhcp_server_set_router(link->dhcp_server,
1114 &main_address->in_addr.in);
1119 if (link
->network
->dhcp_server_max_lease_time_usec
> 0) {
1120 r
= sd_dhcp_server_set_max_lease_time(
1122 DIV_ROUND_UP(link
->network
->dhcp_server_max_lease_time_usec
, USEC_PER_SEC
));
1127 if (link
->network
->dhcp_server_default_lease_time_usec
> 0) {
1128 r
= sd_dhcp_server_set_default_lease_time(
1130 DIV_ROUND_UP(link
->network
->dhcp_server_default_lease_time_usec
, USEC_PER_SEC
));
1135 if (link
->network
->dhcp_server_emit_dns
) {
1137 if (link
->network
->n_dhcp_server_dns
> 0)
1138 r
= sd_dhcp_server_set_dns(link
->dhcp_server
, link
->network
->dhcp_server_dns
, link
->network
->n_dhcp_server_dns
);
1140 uplink
= manager_find_uplink(link
->manager
, link
);
1141 acquired_uplink
= true;
1144 log_link_debug(link
, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1147 r
= link_push_uplink_dns_to_dhcp_server(uplink
, link
->dhcp_server
);
1150 log_link_warning_errno(link
, r
, "Failed to set DNS server for DHCP server, ignoring: %m");
1153 if (link
->network
->dhcp_server_emit_ntp
) {
1155 if (link
->network
->n_dhcp_server_ntp
> 0)
1156 r
= sd_dhcp_server_set_ntp(link
->dhcp_server
, link
->network
->dhcp_server_ntp
, link
->network
->n_dhcp_server_ntp
);
1158 if (!acquired_uplink
)
1159 uplink
= manager_find_uplink(link
->manager
, link
);
1162 log_link_debug(link
, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1165 r
= link_push_uplink_ntp_to_dhcp_server(uplink
, link
->dhcp_server
);
1169 log_link_warning_errno(link
, r
, "Failed to set NTP server for DHCP server, ignoring: %m");
1172 r
= sd_dhcp_server_set_emit_router(link
->dhcp_server
, link
->network
->dhcp_server_emit_router
);
1174 log_link_warning_errno(link
, r
, "Failed to set router emission for DHCP server: %m");
1178 if (link
->network
->dhcp_server_emit_timezone
) {
1179 _cleanup_free_
char *buffer
= NULL
;
1180 const char *tz
= NULL
;
1182 if (link
->network
->dhcp_server_timezone
)
1183 tz
= link
->network
->dhcp_server_timezone
;
1185 r
= get_timezone(&buffer
);
1187 log_warning_errno(r
, "Failed to determine timezone: %m");
1193 r
= sd_dhcp_server_set_timezone(link
->dhcp_server
, tz
);
1199 r
= sd_dhcp_server_start(link
->dhcp_server
);
1201 log_link_warning_errno(link
, r
, "Could not start DHCPv4 server instance: %m");
1203 link_enter_failed(link
);
1208 log_link_debug(link
, "Offering DHCPv4 leases");
1211 if (link
->address_messages
== 0)
1212 link_enter_set_routes(link
);
1214 log_link_debug(link
, "Setting addresses");
1219 int link_address_remove_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
1220 _cleanup_(link_unrefp
) Link
*link
= userdata
;
1225 assert(link
->ifname
);
1227 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1230 r
= sd_netlink_message_get_errno(m
);
1231 if (r
< 0 && r
!= -EADDRNOTAVAIL
)
1232 log_link_warning_errno(link
, r
, "Could not drop address: %m");
1237 static int link_set_bridge_vlan(Link
*link
) {
1240 r
= br_vlan_configure(link
, link
->network
->pvid
, link
->network
->br_vid_bitmap
, link
->network
->br_untagged_bitmap
);
1242 log_link_error_errno(link
, r
, "Failed to assign VLANs to bridge port: %m");
1247 static int link_set_proxy_arp(Link
*link
) {
1248 const char *p
= NULL
;
1251 if (!link_proxy_arp_enabled(link
))
1254 p
= strjoina("/proc/sys/net/ipv4/conf/", link
->ifname
, "/proxy_arp");
1256 r
= write_string_file(p
, one_zero(link
->network
->proxy_arp
), WRITE_STRING_FILE_VERIFY_ON_FAILURE
);
1258 log_link_warning_errno(link
, r
, "Cannot configure proxy ARP for interface: %m");
1263 static int link_set_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
1264 _cleanup_(link_unrefp
) Link
*link
= userdata
;
1267 log_link_debug(link
, "Set link");
1269 r
= sd_netlink_message_get_errno(m
);
1270 if (r
< 0 && r
!= -EEXIST
) {
1271 log_link_error_errno(link
, r
, "Could not join netdev: %m");
1272 link_enter_failed(link
);
1279 static int set_mtu_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
1280 _cleanup_(link_unrefp
) Link
*link
= userdata
;
1285 assert(link
->ifname
);
1287 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1290 r
= sd_netlink_message_get_errno(m
);
1292 log_link_warning_errno(link
, r
, "Could not set MTU: %m");
1297 int link_set_mtu(Link
*link
, uint32_t mtu
) {
1298 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1302 assert(link
->manager
);
1303 assert(link
->manager
->rtnl
);
1305 log_link_debug(link
, "Setting MTU: %" PRIu32
, mtu
);
1307 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1309 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1311 r
= sd_netlink_message_append_u32(req
, IFLA_MTU
, mtu
);
1313 return log_link_error_errno(link
, r
, "Could not append MTU: %m");
1315 r
= sd_netlink_call_async(link
->manager
->rtnl
, req
, set_mtu_handler
, link
, 0, NULL
);
1317 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1319 link
->setting_mtu
= true;
1326 static int set_flags_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
1327 _cleanup_(link_unrefp
) Link
*link
= userdata
;
1332 assert(link
->ifname
);
1334 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1337 r
= sd_netlink_message_get_errno(m
);
1339 log_link_warning_errno(link
, r
, "Could not set link flags: %m");
1344 static int link_set_flags(Link
*link
) {
1345 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1346 unsigned ifi_change
= 0;
1347 unsigned ifi_flags
= 0;
1351 assert(link
->manager
);
1352 assert(link
->manager
->rtnl
);
1354 if (link
->flags
& IFF_LOOPBACK
)
1360 if (link
->network
->arp
< 0)
1363 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1365 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1367 if (link
->network
->arp
>= 0) {
1368 ifi_change
|= IFF_NOARP
;
1369 ifi_flags
|= link
->network
->arp
? 0 : IFF_NOARP
;
1372 r
= sd_rtnl_message_link_set_flags(req
, ifi_flags
, ifi_change
);
1374 return log_link_error_errno(link
, r
, "Could not set link flags: %m");
1376 r
= sd_netlink_call_async(link
->manager
->rtnl
, req
, set_flags_handler
, link
, 0, NULL
);
1378 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1385 static int link_set_bridge(Link
*link
) {
1386 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1390 assert(link
->network
);
1392 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1394 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1396 r
= sd_rtnl_message_link_set_family(req
, PF_BRIDGE
);
1398 return log_link_error_errno(link
, r
, "Could not set message family: %m");
1400 r
= sd_netlink_message_open_container(req
, IFLA_PROTINFO
);
1402 return log_link_error_errno(link
, r
, "Could not append IFLA_PROTINFO attribute: %m");
1404 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_GUARD
, !link
->network
->use_bpdu
);
1406 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1408 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_MODE
, link
->network
->hairpin
);
1410 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_MODE attribute: %m");
1412 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_FAST_LEAVE
, link
->network
->fast_leave
);
1414 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1416 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_PROTECT
, !link
->network
->allow_port_to_be_root
);
1418 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
1420 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_UNICAST_FLOOD
, link
->network
->unicast_flood
);
1422 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
1424 if (link
->network
->cost
!= 0) {
1425 r
= sd_netlink_message_append_u32(req
, IFLA_BRPORT_COST
, link
->network
->cost
);
1427 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_COST attribute: %m");
1429 if (link
->network
->priority
!= LINK_BRIDGE_PORT_PRIORITY_INVALID
) {
1430 r
= sd_netlink_message_append_u16(req
, IFLA_BRPORT_PRIORITY
, link
->network
->priority
);
1432 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1435 r
= sd_netlink_message_close_container(req
);
1437 return log_link_error_errno(link
, r
, "Could not append IFLA_LINKINFO attribute: %m");
1439 r
= sd_netlink_call_async(link
->manager
->rtnl
, req
, link_set_handler
, link
, 0, NULL
);
1441 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1448 static int link_bond_set(Link
*link
) {
1449 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1453 assert(link
->network
);
1455 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_NEWLINK
, link
->network
->bond
->ifindex
);
1457 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1459 r
= sd_netlink_message_set_flags(req
, NLM_F_REQUEST
| NLM_F_ACK
);
1461 return log_link_error_errno(link
, r
, "Could not set netlink flags: %m");
1463 r
= sd_netlink_message_open_container(req
, IFLA_LINKINFO
);
1465 return log_link_error_errno(link
, r
, "Could not append IFLA_PROTINFO attribute: %m");
1467 r
= sd_netlink_message_open_container_union(req
, IFLA_INFO_DATA
, "bond");
1469 return log_link_error_errno(link
, r
, "Could not append IFLA_INFO_DATA attribute: %m");
1471 if (link
->network
->active_slave
) {
1472 r
= sd_netlink_message_append_u32(req
, IFLA_BOND_ACTIVE_SLAVE
, link
->ifindex
);
1474 return log_link_error_errno(link
, r
, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1477 if (link
->network
->primary_slave
) {
1478 r
= sd_netlink_message_append_u32(req
, IFLA_BOND_PRIMARY
, link
->ifindex
);
1480 return log_link_error_errno(link
, r
, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1483 r
= sd_netlink_message_close_container(req
);
1485 return log_link_error_errno(link
, r
, "Could not append IFLA_LINKINFO attribute: %m");
1487 r
= sd_netlink_message_close_container(req
);
1489 return log_link_error_errno(link
, r
, "Could not append IFLA_INFO_DATA attribute: %m");
1491 r
= sd_netlink_call_async(link
->manager
->rtnl
, req
, set_flags_handler
, link
, 0, NULL
);
1493 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1500 static int link_lldp_save(Link
*link
) {
1501 _cleanup_free_
char *temp_path
= NULL
;
1502 _cleanup_fclose_
FILE *f
= NULL
;
1503 sd_lldp_neighbor
**l
= NULL
;
1507 assert(link
->lldp_file
);
1510 (void) unlink(link
->lldp_file
);
1514 r
= sd_lldp_get_neighbors(link
->lldp
, &l
);
1518 (void) unlink(link
->lldp_file
);
1524 r
= fopen_temporary(link
->lldp_file
, &f
, &temp_path
);
1528 fchmod(fileno(f
), 0644);
1530 for (i
= 0; i
< n
; i
++) {
1535 r
= sd_lldp_neighbor_get_raw(l
[i
], &p
, &sz
);
1540 (void) fwrite(&u
, 1, sizeof(u
), f
);
1541 (void) fwrite(p
, 1, sz
, f
);
1544 r
= fflush_and_check(f
);
1548 if (rename(temp_path
, link
->lldp_file
) < 0) {
1555 (void) unlink(link
->lldp_file
);
1557 (void) unlink(temp_path
);
1559 log_link_error_errno(link
, r
, "Failed to save LLDP data to %s: %m", link
->lldp_file
);
1563 for (i
= 0; i
< n
; i
++)
1564 sd_lldp_neighbor_unref(l
[i
]);
1571 static void lldp_handler(sd_lldp
*lldp
, sd_lldp_event event
, sd_lldp_neighbor
*n
, void *userdata
) {
1572 Link
*link
= userdata
;
1577 (void) link_lldp_save(link
);
1579 if (link_lldp_emit_enabled(link
) && event
== SD_LLDP_EVENT_ADDED
) {
1580 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1582 log_link_debug(link
, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1584 r
= link_lldp_emit_start(link
);
1586 log_link_warning_errno(link
, r
, "Failed to restart LLDP transmission: %m");
1590 static int link_acquire_ipv6_conf(Link
*link
) {
1595 if (link_dhcp6_enabled(link
)) {
1596 assert(link
->dhcp6_client
);
1597 assert(in_addr_is_link_local(AF_INET6
, (const union in_addr_union
*)&link
->ipv6ll_address
) > 0);
1599 /* start DHCPv6 client in stateless mode */
1600 r
= dhcp6_request_address(link
, true);
1601 if (r
< 0 && r
!= -EBUSY
)
1602 return log_link_warning_errno(link
, r
, "Could not acquire DHCPv6 lease: %m");
1604 log_link_debug(link
, "Acquiring DHCPv6 lease");
1607 if (link_ipv6_accept_ra_enabled(link
)) {
1608 assert(link
->ndisc
);
1610 log_link_debug(link
, "Discovering IPv6 routers");
1612 r
= sd_ndisc_start(link
->ndisc
);
1613 if (r
< 0 && r
!= -EBUSY
)
1614 return log_link_warning_errno(link
, r
, "Could not start IPv6 Router Discovery: %m");
1617 if (link_radv_enabled(link
)) {
1619 assert(in_addr_is_link_local(AF_INET6
, (const union in_addr_union
*)&link
->ipv6ll_address
) > 0);
1621 log_link_debug(link
, "Starting IPv6 Router Advertisements");
1623 r
= sd_radv_start(link
->radv
);
1624 if (r
< 0 && r
!= -EBUSY
)
1625 return log_link_warning_errno(link
, r
, "Could not start IPv6 Router Advertisement: %m");
1631 static int link_acquire_ipv4_conf(Link
*link
) {
1635 assert(link
->network
);
1636 assert(link
->manager
);
1637 assert(link
->manager
->event
);
1639 if (link_ipv4ll_enabled(link
)) {
1640 assert(link
->ipv4ll
);
1642 log_link_debug(link
, "Acquiring IPv4 link-local address");
1644 r
= sd_ipv4ll_start(link
->ipv4ll
);
1646 return log_link_warning_errno(link
, r
, "Could not acquire IPv4 link-local address: %m");
1649 if (link_dhcp4_enabled(link
)) {
1650 assert(link
->dhcp_client
);
1652 log_link_debug(link
, "Acquiring DHCPv4 lease");
1654 r
= sd_dhcp_client_start(link
->dhcp_client
);
1656 return log_link_warning_errno(link
, r
, "Could not acquire DHCPv4 lease: %m");
1662 static int link_acquire_conf(Link
*link
) {
1667 if (link
->setting_mtu
) {
1668 link
->setting_mtu
= false;
1672 r
= link_acquire_ipv4_conf(link
);
1676 if (in_addr_is_null(AF_INET6
, (const union in_addr_union
*) &link
->ipv6ll_address
) == 0) {
1677 r
= link_acquire_ipv6_conf(link
);
1682 if (link_lldp_emit_enabled(link
)) {
1683 r
= link_lldp_emit_start(link
);
1685 return log_link_warning_errno(link
, r
, "Failed to start LLDP transmission: %m");
1691 bool link_has_carrier(Link
*link
) {
1692 /* see Documentation/networking/operstates.txt in the kernel sources */
1694 if (link
->kernel_operstate
== IF_OPER_UP
)
1697 if (link
->kernel_operstate
== IF_OPER_UNKNOWN
)
1698 /* operstate may not be implemented, so fall back to flags */
1699 if ((link
->flags
& IFF_LOWER_UP
) && !(link
->flags
& IFF_DORMANT
))
1705 static int link_up_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
1706 _cleanup_(link_unrefp
) Link
*link
= userdata
;
1711 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1714 r
= sd_netlink_message_get_errno(m
);
1716 /* we warn but don't fail the link, as it may be
1718 log_link_warning_errno(link
, r
, "Could not bring up interface: %m");
1723 int link_up(Link
*link
) {
1724 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1725 uint8_t ipv6ll_mode
;
1729 assert(link
->network
);
1730 assert(link
->manager
);
1731 assert(link
->manager
->rtnl
);
1733 log_link_debug(link
, "Bringing link up");
1735 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1737 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1739 /* set it free if not enslaved with networkd */
1740 if (!link
->network
->bridge
&& !link
->network
->bond
&& !link
->network
->vrf
) {
1741 r
= sd_netlink_message_append_u32(req
, IFLA_MASTER
, 0);
1743 return log_link_error_errno(link
, r
, "Could not append IFLA_MASTER attribute: %m");
1746 r
= sd_rtnl_message_link_set_flags(req
, IFF_UP
, IFF_UP
);
1748 return log_link_error_errno(link
, r
, "Could not set link flags: %m");
1750 if (link
->network
->mac
) {
1751 r
= sd_netlink_message_append_ether_addr(req
, IFLA_ADDRESS
, link
->network
->mac
);
1753 return log_link_error_errno(link
, r
, "Could not set MAC address: %m");
1756 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
1757 for this interface, or if it is a bridge slave, then disable IPv6 else enable it. */
1758 (void) link_enable_ipv6(link
);
1760 if (link
->network
->mtu
) {
1761 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
1762 on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1763 if (link_ipv6_enabled(link
) && link
->network
->mtu
< IPV6_MIN_MTU
) {
1765 log_link_warning(link
, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU
) ", as "
1766 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU
) " bytes: %m");
1768 link
->network
->mtu
= IPV6_MIN_MTU
;
1771 r
= sd_netlink_message_append_u32(req
, IFLA_MTU
, link
->network
->mtu
);
1773 return log_link_error_errno(link
, r
, "Could not set MTU: %m");
1776 r
= sd_netlink_message_open_container(req
, IFLA_AF_SPEC
);
1778 return log_link_error_errno(link
, r
, "Could not open IFLA_AF_SPEC container: %m");
1780 if (link_ipv6_enabled(link
)) {
1781 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1782 r
= sd_netlink_message_open_container(req
, AF_INET6
);
1784 return log_link_error_errno(link
, r
, "Could not open AF_INET6 container: %m");
1786 if (!link_ipv6ll_enabled(link
))
1787 ipv6ll_mode
= IN6_ADDR_GEN_MODE_NONE
;
1789 const char *p
= NULL
;
1790 _cleanup_free_
char *stable_secret
= NULL
;
1792 p
= strjoina("/proc/sys/net/ipv6/conf/", link
->ifname
, "/stable_secret");
1793 r
= read_one_line_file(p
, &stable_secret
);
1796 ipv6ll_mode
= IN6_ADDR_GEN_MODE_EUI64
;
1798 ipv6ll_mode
= IN6_ADDR_GEN_MODE_STABLE_PRIVACY
;
1800 r
= sd_netlink_message_append_u8(req
, IFLA_INET6_ADDR_GEN_MODE
, ipv6ll_mode
);
1802 return log_link_error_errno(link
, r
, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1804 if (!in_addr_is_null(AF_INET6
, &link
->network
->ipv6_token
)) {
1805 r
= sd_netlink_message_append_in6_addr(req
, IFLA_INET6_TOKEN
, &link
->network
->ipv6_token
.in6
);
1807 return log_link_error_errno(link
, r
, "Could not append IFLA_INET6_TOKEN: %m");
1810 r
= sd_netlink_message_close_container(req
);
1812 return log_link_error_errno(link
, r
, "Could not close AF_INET6 container: %m");
1815 r
= sd_netlink_message_close_container(req
);
1817 return log_link_error_errno(link
, r
, "Could not close IFLA_AF_SPEC container: %m");
1819 r
= sd_netlink_call_async(link
->manager
->rtnl
, req
, link_up_handler
, link
, 0, NULL
);
1821 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1828 static int link_down_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
1829 _cleanup_(link_unrefp
) Link
*link
= userdata
;
1834 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1837 r
= sd_netlink_message_get_errno(m
);
1839 log_link_warning_errno(link
, r
, "Could not bring down interface: %m");
1844 int link_down(Link
*link
) {
1845 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1849 assert(link
->manager
);
1850 assert(link
->manager
->rtnl
);
1852 log_link_debug(link
, "Bringing link down");
1854 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
,
1855 RTM_SETLINK
, link
->ifindex
);
1857 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1859 r
= sd_rtnl_message_link_set_flags(req
, 0, IFF_UP
);
1861 return log_link_error_errno(link
, r
, "Could not set link flags: %m");
1863 r
= sd_netlink_call_async(link
->manager
->rtnl
, req
, link_down_handler
, link
, 0, NULL
);
1865 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1872 static int link_up_can(Link
*link
) {
1873 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1878 log_link_debug(link
, "Bringing CAN link up");
1880 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1882 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1884 r
= sd_rtnl_message_link_set_flags(req
, IFF_UP
, IFF_UP
);
1886 return log_link_error_errno(link
, r
, "Could not set link flags: %m");
1888 r
= sd_netlink_call_async(link
->manager
->rtnl
, req
, link_up_handler
, link
, 0, NULL
);
1890 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1897 static int link_handle_bound_to_list(Link
*link
) {
1901 bool required_up
= false;
1902 bool link_is_up
= false;
1906 if (hashmap_isempty(link
->bound_to_links
))
1909 if (link
->flags
& IFF_UP
)
1912 HASHMAP_FOREACH (l
, link
->bound_to_links
, i
)
1913 if (link_has_carrier(l
)) {
1918 if (!required_up
&& link_is_up
) {
1919 r
= link_down(link
);
1922 } else if (required_up
&& !link_is_up
) {
1931 static int link_handle_bound_by_list(Link
*link
) {
1938 if (hashmap_isempty(link
->bound_by_links
))
1941 HASHMAP_FOREACH (l
, link
->bound_by_links
, i
) {
1942 r
= link_handle_bound_to_list(l
);
1950 static int link_put_carrier(Link
*link
, Link
*carrier
, Hashmap
**h
) {
1956 if (link
== carrier
)
1959 if (hashmap_get(*h
, INT_TO_PTR(carrier
->ifindex
)))
1962 r
= hashmap_ensure_allocated(h
, NULL
);
1966 r
= hashmap_put(*h
, INT_TO_PTR(carrier
->ifindex
), carrier
);
1973 static int link_new_bound_by_list(Link
*link
) {
1978 bool list_updated
= false;
1981 assert(link
->manager
);
1985 HASHMAP_FOREACH(carrier
, m
->links
, i
) {
1986 if (!carrier
->network
)
1989 if (strv_isempty(carrier
->network
->bind_carrier
))
1992 if (strv_fnmatch(carrier
->network
->bind_carrier
, link
->ifname
, 0)) {
1993 r
= link_put_carrier(link
, carrier
, &link
->bound_by_links
);
1997 list_updated
= true;
2004 HASHMAP_FOREACH(carrier
, link
->bound_by_links
, i
) {
2005 r
= link_put_carrier(carrier
, link
, &carrier
->bound_to_links
);
2009 link_dirty(carrier
);
2015 static int link_new_bound_to_list(Link
*link
) {
2020 bool list_updated
= false;
2023 assert(link
->manager
);
2028 if (strv_isempty(link
->network
->bind_carrier
))
2033 HASHMAP_FOREACH (carrier
, m
->links
, i
) {
2034 if (strv_fnmatch(link
->network
->bind_carrier
, carrier
->ifname
, 0)) {
2035 r
= link_put_carrier(link
, carrier
, &link
->bound_to_links
);
2039 list_updated
= true;
2046 HASHMAP_FOREACH (carrier
, link
->bound_to_links
, i
) {
2047 r
= link_put_carrier(carrier
, link
, &carrier
->bound_by_links
);
2051 link_dirty(carrier
);
2057 static int link_new_carrier_maps(Link
*link
) {
2060 r
= link_new_bound_by_list(link
);
2064 r
= link_handle_bound_by_list(link
);
2068 r
= link_new_bound_to_list(link
);
2072 r
= link_handle_bound_to_list(link
);
2079 static void link_free_bound_to_list(Link
*link
) {
2083 HASHMAP_FOREACH (bound_to
, link
->bound_to_links
, i
) {
2084 hashmap_remove(link
->bound_to_links
, INT_TO_PTR(bound_to
->ifindex
));
2086 if (hashmap_remove(bound_to
->bound_by_links
, INT_TO_PTR(link
->ifindex
)))
2087 link_dirty(bound_to
);
2093 static void link_free_bound_by_list(Link
*link
) {
2097 HASHMAP_FOREACH (bound_by
, link
->bound_by_links
, i
) {
2098 hashmap_remove(link
->bound_by_links
, INT_TO_PTR(bound_by
->ifindex
));
2100 if (hashmap_remove(bound_by
->bound_to_links
, INT_TO_PTR(link
->ifindex
))) {
2101 link_dirty(bound_by
);
2102 link_handle_bound_to_list(bound_by
);
2109 static void link_free_carrier_maps(Link
*link
) {
2110 bool list_updated
= false;
2114 if (!hashmap_isempty(link
->bound_to_links
)) {
2115 link_free_bound_to_list(link
);
2116 list_updated
= true;
2119 if (!hashmap_isempty(link
->bound_by_links
)) {
2120 link_free_bound_by_list(link
);
2121 list_updated
= true;
2130 void link_drop(Link
*link
) {
2131 if (!link
|| link
->state
== LINK_STATE_LINGER
)
2134 link_set_state(link
, LINK_STATE_LINGER
);
2136 link_free_carrier_maps(link
);
2138 log_link_debug(link
, "Link removed");
2140 (void)unlink(link
->state_file
);
2146 static int link_joined(Link
*link
) {
2150 assert(link
->network
);
2152 if (!hashmap_isempty(link
->bound_to_links
)) {
2153 r
= link_handle_bound_to_list(link
);
2156 } else if (!(link
->flags
& IFF_UP
)) {
2159 link_enter_failed(link
);
2164 if (link
->network
->bridge
) {
2165 r
= link_set_bridge(link
);
2167 log_link_error_errno(link
, r
, "Could not set bridge message: %m");
2170 if (link
->network
->bond
) {
2171 r
= link_bond_set(link
);
2173 log_link_error_errno(link
, r
, "Could not set bond message: %m");
2176 if (link
->network
->use_br_vlan
&&
2177 (link
->network
->bridge
|| streq_ptr("bridge", link
->kind
))) {
2178 r
= link_set_bridge_vlan(link
);
2180 log_link_error_errno(link
, r
, "Could not set bridge vlan: %m");
2183 /* Skip setting up addresses until it gets carrier,
2184 or it would try to set addresses twice,
2185 which is bad for non-idempotent steps. */
2186 if (!link_has_carrier(link
) && !link
->network
->configure_without_carrier
)
2189 return link_enter_set_addresses(link
);
2192 static int netdev_join_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
2193 _cleanup_(link_unrefp
) Link
*link
= userdata
;
2197 assert(link
->network
);
2201 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
2204 r
= sd_netlink_message_get_errno(m
);
2205 if (r
< 0 && r
!= -EEXIST
) {
2206 log_link_error_errno(link
, r
, "Could not join netdev: %m");
2207 link_enter_failed(link
);
2210 log_link_debug(link
, "Joined netdev");
2212 if (link
->enslaving
<= 0)
2218 static int link_enter_join_netdev(Link
*link
) {
2224 assert(link
->network
);
2225 assert(link
->state
== LINK_STATE_PENDING
);
2227 link_set_state(link
, LINK_STATE_ENSLAVING
);
2231 if (!link
->network
->bridge
&&
2232 !link
->network
->bond
&&
2233 !link
->network
->vrf
&&
2234 hashmap_isempty(link
->network
->stacked_netdevs
))
2235 return link_joined(link
);
2237 if (link
->network
->bond
) {
2238 log_struct(LOG_DEBUG
,
2239 LOG_LINK_INTERFACE(link
),
2240 LOG_NETDEV_INTERFACE(link
->network
->bond
),
2241 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", link
->network
->bond
->ifname
),
2244 r
= netdev_join(link
->network
->bond
, link
, netdev_join_handler
);
2246 log_struct_errno(LOG_WARNING
, r
,
2247 LOG_LINK_INTERFACE(link
),
2248 LOG_NETDEV_INTERFACE(link
->network
->bond
),
2249 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", link
->network
->bond
->ifname
),
2252 link_enter_failed(link
);
2259 if (link
->network
->bridge
) {
2260 log_struct(LOG_DEBUG
,
2261 LOG_LINK_INTERFACE(link
),
2262 LOG_NETDEV_INTERFACE(link
->network
->bridge
),
2263 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", link
->network
->bridge
->ifname
),
2266 r
= netdev_join(link
->network
->bridge
, link
, netdev_join_handler
);
2268 log_struct_errno(LOG_WARNING
, r
,
2269 LOG_LINK_INTERFACE(link
),
2270 LOG_NETDEV_INTERFACE(link
->network
->bridge
),
2271 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", link
->network
->bridge
->ifname
),
2273 link_enter_failed(link
);
2280 if (link
->network
->vrf
) {
2281 log_struct(LOG_DEBUG
,
2282 LOG_LINK_INTERFACE(link
),
2283 LOG_NETDEV_INTERFACE(link
->network
->vrf
),
2284 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", link
->network
->vrf
->ifname
),
2286 r
= netdev_join(link
->network
->vrf
, link
, netdev_join_handler
);
2288 log_struct_errno(LOG_WARNING
, r
,
2289 LOG_LINK_INTERFACE(link
),
2290 LOG_NETDEV_INTERFACE(link
->network
->vrf
),
2291 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", link
->network
->vrf
->ifname
),
2293 link_enter_failed(link
);
2300 HASHMAP_FOREACH(netdev
, link
->network
->stacked_netdevs
, i
) {
2302 if (netdev
->ifindex
> 0) {
2307 log_struct(LOG_DEBUG
,
2308 LOG_LINK_INTERFACE(link
),
2309 LOG_NETDEV_INTERFACE(netdev
),
2310 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", netdev
->ifname
),
2313 r
= netdev_join(netdev
, link
, netdev_join_handler
);
2315 log_struct_errno(LOG_WARNING
, r
,
2316 LOG_LINK_INTERFACE(link
),
2317 LOG_NETDEV_INTERFACE(netdev
),
2318 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", netdev
->ifname
),
2320 link_enter_failed(link
);
2330 static int link_set_ipv4_forward(Link
*link
) {
2333 if (!link_ipv4_forward_enabled(link
))
2336 /* We propagate the forwarding flag from one interface to the
2337 * global setting one way. This means: as long as at least one
2338 * interface was configured at any time that had IP forwarding
2339 * enabled the setting will stay on for good. We do this
2340 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2341 * somewhat in sync (see below). */
2343 r
= write_string_file("/proc/sys/net/ipv4/ip_forward", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE
);
2345 log_link_warning_errno(link
, r
, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
2350 static int link_set_ipv6_forward(Link
*link
) {
2353 if (!link_ipv6_forward_enabled(link
))
2356 /* On Linux, the IPv6 stack does not know a per-interface
2357 * packet forwarding setting: either packet forwarding is on
2358 * for all, or off for all. We hence don't bother with a
2359 * per-interface setting, but simply propagate the interface
2360 * flag, if it is set, to the global flag, one-way. Note that
2361 * while IPv4 would allow a per-interface flag, we expose the
2362 * same behaviour there and also propagate the setting from
2363 * one to all, to keep things simple (see above). */
2365 r
= write_string_file("/proc/sys/net/ipv6/conf/all/forwarding", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE
);
2367 log_link_warning_errno(link
, r
, "Cannot configure IPv6 packet forwarding, ignoring: %m");
2372 static int link_set_ipv6_privacy_extensions(Link
*link
) {
2373 char buf
[DECIMAL_STR_MAX(unsigned) + 1];
2374 IPv6PrivacyExtensions s
;
2375 const char *p
= NULL
;
2378 s
= link_ipv6_privacy_extensions(link
);
2382 p
= strjoina("/proc/sys/net/ipv6/conf/", link
->ifname
, "/use_tempaddr");
2383 xsprintf(buf
, "%u", (unsigned) link
->network
->ipv6_privacy_extensions
);
2385 r
= write_string_file(p
, buf
, WRITE_STRING_FILE_VERIFY_ON_FAILURE
);
2387 log_link_warning_errno(link
, r
, "Cannot configure IPv6 privacy extension for interface: %m");
2392 static int link_set_ipv6_accept_ra(Link
*link
) {
2393 const char *p
= NULL
;
2396 /* Make this a NOP if IPv6 is not available */
2397 if (!socket_ipv6_is_supported())
2400 if (link
->flags
& IFF_LOOPBACK
)
2406 p
= strjoina("/proc/sys/net/ipv6/conf/", link
->ifname
, "/accept_ra");
2408 /* We handle router advertisements ourselves, tell the kernel to GTFO */
2409 r
= write_string_file(p
, "0", WRITE_STRING_FILE_VERIFY_ON_FAILURE
);
2411 log_link_warning_errno(link
, r
, "Cannot disable kernel IPv6 accept_ra for interface: %m");
2416 static int link_set_ipv6_dad_transmits(Link
*link
) {
2417 char buf
[DECIMAL_STR_MAX(int) + 1];
2418 const char *p
= NULL
;
2421 /* Make this a NOP if IPv6 is not available */
2422 if (!socket_ipv6_is_supported())
2425 if (link
->flags
& IFF_LOOPBACK
)
2431 if (link
->network
->ipv6_dad_transmits
< 0)
2434 p
= strjoina("/proc/sys/net/ipv6/conf/", link
->ifname
, "/dad_transmits");
2435 xsprintf(buf
, "%i", link
->network
->ipv6_dad_transmits
);
2437 r
= write_string_file(p
, buf
, WRITE_STRING_FILE_VERIFY_ON_FAILURE
);
2439 log_link_warning_errno(link
, r
, "Cannot set IPv6 dad transmits for interface: %m");
2444 static int link_set_ipv6_hop_limit(Link
*link
) {
2445 char buf
[DECIMAL_STR_MAX(int) + 1];
2446 const char *p
= NULL
;
2449 /* Make this a NOP if IPv6 is not available */
2450 if (!socket_ipv6_is_supported())
2453 if (link
->flags
& IFF_LOOPBACK
)
2459 if (link
->network
->ipv6_hop_limit
< 0)
2462 p
= strjoina("/proc/sys/net/ipv6/conf/", link
->ifname
, "/hop_limit");
2463 xsprintf(buf
, "%i", link
->network
->ipv6_hop_limit
);
2465 r
= write_string_file(p
, buf
, WRITE_STRING_FILE_VERIFY_ON_FAILURE
);
2467 log_link_warning_errno(link
, r
, "Cannot set IPv6 hop limit for interface: %m");
2472 static int link_set_ipv6_mtu(Link
*link
) {
2473 char buf
[DECIMAL_STR_MAX(unsigned) + 1];
2474 const char *p
= NULL
;
2477 /* Make this a NOP if IPv6 is not available */
2478 if (!socket_ipv6_is_supported())
2481 if (link
->flags
& IFF_LOOPBACK
)
2484 if (link
->network
->ipv6_mtu
== 0)
2487 p
= strjoina("/proc/sys/net/ipv6/conf/", link
->ifname
, "/mtu");
2489 xsprintf(buf
, "%u", link
->network
->ipv6_mtu
);
2491 r
= write_string_file(p
, buf
, 0);
2493 log_link_warning_errno(link
, r
, "Cannot set IPv6 MTU for interface: %m");
2498 static int link_drop_foreign_config(Link
*link
) {
2504 SET_FOREACH(address
, link
->addresses_foreign
, i
) {
2505 /* we consider IPv6LL addresses to be managed by the kernel */
2506 if (address
->family
== AF_INET6
&& in_addr_is_link_local(AF_INET6
, &address
->in_addr
) == 1)
2509 r
= address_remove(address
, link
, link_address_remove_handler
);
2514 SET_FOREACH(route
, link
->routes_foreign
, i
) {
2515 /* do not touch routes managed by the kernel */
2516 if (route
->protocol
== RTPROT_KERNEL
)
2519 r
= route_remove(route
, link
, link_route_remove_handler
);
2527 static int link_drop_config(Link
*link
) {
2528 Address
*address
, *pool_address
;
2533 SET_FOREACH(address
, link
->addresses
, i
) {
2534 /* we consider IPv6LL addresses to be managed by the kernel */
2535 if (address
->family
== AF_INET6
&& in_addr_is_link_local(AF_INET6
, &address
->in_addr
) == 1)
2538 r
= address_remove(address
, link
, link_address_remove_handler
);
2542 /* If this address came from an address pool, clean up the pool */
2543 LIST_FOREACH(addresses
, pool_address
, link
->pool_addresses
) {
2544 if (address_equal(address
, pool_address
)) {
2545 LIST_REMOVE(addresses
, link
->pool_addresses
, pool_address
);
2546 address_free(pool_address
);
2552 SET_FOREACH(route
, link
->routes
, i
) {
2553 /* do not touch routes managed by the kernel */
2554 if (route
->protocol
== RTPROT_KERNEL
)
2557 r
= route_remove(route
, link
, link_route_remove_handler
);
2567 static int link_update_lldp(Link
*link
) {
2575 if (link
->flags
& IFF_UP
) {
2576 r
= sd_lldp_start(link
->lldp
);
2578 log_link_debug(link
, "Started LLDP.");
2580 r
= sd_lldp_stop(link
->lldp
);
2582 log_link_debug(link
, "Stopped LLDP.");
2588 static int link_configure(Link
*link
) {
2592 assert(link
->network
);
2593 assert(link
->state
== LINK_STATE_PENDING
);
2595 if (streq_ptr(link
->kind
, "vcan")) {
2597 if (!(link
->flags
& IFF_UP
)) {
2598 r
= link_up_can(link
);
2600 link_enter_failed(link
);
2608 /* Drop foreign config, but ignore loopback or critical devices.
2609 * We do not want to remove loopback address or addresses used for root NFS. */
2610 if (!(link
->flags
& IFF_LOOPBACK
) && !(link
->network
->dhcp_critical
)) {
2611 r
= link_drop_foreign_config(link
);
2616 r
= link_set_proxy_arp(link
);
2620 r
= ipv6_proxy_ndp_addresses_configure(link
);
2624 r
= link_set_ipv4_forward(link
);
2628 r
= link_set_ipv6_forward(link
);
2632 r
= link_set_ipv6_privacy_extensions(link
);
2636 r
= link_set_ipv6_accept_ra(link
);
2640 r
= link_set_ipv6_dad_transmits(link
);
2644 r
= link_set_ipv6_hop_limit(link
);
2648 r
= link_set_flags(link
);
2652 r
= link_set_ipv6_mtu(link
);
2656 if (link_ipv4ll_enabled(link
)) {
2657 r
= ipv4ll_configure(link
);
2662 if (link_dhcp4_enabled(link
)) {
2663 r
= dhcp4_set_promote_secondaries(link
);
2667 r
= dhcp4_configure(link
);
2672 if (link_dhcp4_server_enabled(link
)) {
2673 r
= sd_dhcp_server_new(&link
->dhcp_server
, link
->ifindex
);
2677 r
= sd_dhcp_server_attach_event(link
->dhcp_server
, NULL
, 0);
2682 if (link_dhcp6_enabled(link
) ||
2683 link_ipv6_accept_ra_enabled(link
)) {
2684 r
= dhcp6_configure(link
);
2689 if (link_ipv6_accept_ra_enabled(link
)) {
2690 r
= ndisc_configure(link
);
2695 if (link_radv_enabled(link
)) {
2696 r
= radv_configure(link
);
2701 if (link_lldp_rx_enabled(link
)) {
2702 r
= sd_lldp_new(&link
->lldp
);
2706 r
= sd_lldp_set_ifindex(link
->lldp
, link
->ifindex
);
2710 r
= sd_lldp_match_capabilities(link
->lldp
,
2711 link
->network
->lldp_mode
== LLDP_MODE_ROUTERS_ONLY
?
2712 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS
:
2713 SD_LLDP_SYSTEM_CAPABILITIES_ALL
);
2717 r
= sd_lldp_set_filter_address(link
->lldp
, &link
->mac
);
2721 r
= sd_lldp_attach_event(link
->lldp
, NULL
, 0);
2725 r
= sd_lldp_set_callback(link
->lldp
, lldp_handler
, link
);
2729 r
= link_update_lldp(link
);
2734 if (link_has_carrier(link
) || link
->network
->configure_without_carrier
) {
2735 r
= link_acquire_conf(link
);
2740 return link_enter_join_netdev(link
);
2743 static int link_initialized_and_synced(sd_netlink
*rtnl
, sd_netlink_message
*m
,
2745 _cleanup_(link_unrefp
) Link
*link
= userdata
;
2750 assert(link
->ifname
);
2751 assert(link
->manager
);
2753 if (link
->state
!= LINK_STATE_PENDING
)
2756 log_link_debug(link
, "Link state is up-to-date");
2758 r
= link_new_bound_by_list(link
);
2762 r
= link_handle_bound_by_list(link
);
2766 if (!link
->network
) {
2767 r
= network_get(link
->manager
, link
->udev_device
, link
->ifname
,
2768 &link
->mac
, &network
);
2770 link_enter_unmanaged(link
);
2772 } else if (r
== 0 && network
->unmanaged
) {
2773 link_enter_unmanaged(link
);
2778 if (link
->flags
& IFF_LOOPBACK
) {
2779 if (network
->link_local
!= ADDRESS_FAMILY_NO
)
2780 log_link_debug(link
, "Ignoring link-local autoconfiguration for loopback link");
2782 if (network
->dhcp
!= ADDRESS_FAMILY_NO
)
2783 log_link_debug(link
, "Ignoring DHCP clients for loopback link");
2785 if (network
->dhcp_server
)
2786 log_link_debug(link
, "Ignoring DHCP server for loopback link");
2789 r
= network_apply(network
, link
);
2794 r
= link_new_bound_to_list(link
);
2798 r
= link_configure(link
);
2805 int link_initialized(Link
*link
, struct udev_device
*device
) {
2806 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
2810 assert(link
->manager
);
2811 assert(link
->manager
->rtnl
);
2814 if (link
->state
!= LINK_STATE_PENDING
)
2817 if (link
->udev_device
)
2820 log_link_debug(link
, "udev initialized link");
2822 link
->udev_device
= udev_device_ref(device
);
2824 /* udev has initialized the link, but we don't know if we have yet
2825 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2826 * when it returns we know that the pending NEWLINKs have already been
2827 * processed and that we are up-to-date */
2829 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_GETLINK
,
2834 r
= sd_netlink_call_async(link
->manager
->rtnl
, req
,
2835 link_initialized_and_synced
, link
, 0, NULL
);
2844 static int link_load(Link
*link
) {
2845 _cleanup_free_
char *network_file
= NULL
,
2848 *dhcp4_address
= NULL
,
2849 *ipv4ll_address
= NULL
;
2850 union in_addr_union address
;
2851 union in_addr_union route_dst
;
2857 r
= parse_env_file(link
->state_file
, NEWLINE
,
2858 "NETWORK_FILE", &network_file
,
2859 "ADDRESSES", &addresses
,
2861 "DHCP4_ADDRESS", &dhcp4_address
,
2862 "IPV4LL_ADDRESS", &ipv4ll_address
,
2864 if (r
< 0 && r
!= -ENOENT
)
2865 return log_link_error_errno(link
, r
, "Failed to read %s: %m", link
->state_file
);
2872 suffix
= strrchr(network_file
, '.');
2874 log_link_debug(link
, "Failed to get network name from %s", network_file
);
2875 goto network_file_fail
;
2879 r
= network_get_by_name(link
->manager
, basename(network_file
), &network
);
2881 log_link_debug_errno(link
, r
, "Failed to get network %s: %m", basename(network_file
));
2882 goto network_file_fail
;
2885 r
= network_apply(network
, link
);
2887 return log_link_error_errno(link
, r
, "Failed to apply network %s: %m", basename(network_file
));
2896 _cleanup_free_
char *address_str
= NULL
;
2897 char *prefixlen_str
;
2899 unsigned char prefixlen
;
2901 r
= extract_first_word(&p
, &address_str
, NULL
, 0);
2903 log_link_debug_errno(link
, r
, "Failed to extract next address string: %m");
2909 prefixlen_str
= strchr(address_str
, '/');
2910 if (!prefixlen_str
) {
2911 log_link_debug(link
, "Failed to parse address and prefix length %s", address_str
);
2915 *prefixlen_str
++ = '\0';
2917 r
= sscanf(prefixlen_str
, "%hhu", &prefixlen
);
2919 log_link_error(link
, "Failed to parse prefixlen %s", prefixlen_str
);
2923 r
= in_addr_from_string_auto(address_str
, &family
, &address
);
2925 log_link_debug_errno(link
, r
, "Failed to parse address %s: %m", address_str
);
2929 r
= address_add(link
, family
, &address
, prefixlen
, NULL
);
2931 return log_link_error_errno(link
, r
, "Failed to add address: %m");
2940 _cleanup_free_
char *route_str
= NULL
;
2941 _cleanup_(sd_event_source_unrefp
) sd_event_source
*expire
= NULL
;
2943 char *prefixlen_str
;
2945 unsigned char prefixlen
, tos
, table
;
2948 r
= extract_first_word(&p
, &route_str
, NULL
, 0);
2950 log_link_debug_errno(link
, r
, "Failed to extract next route string: %m");
2956 prefixlen_str
= strchr(route_str
, '/');
2957 if (!prefixlen_str
) {
2958 log_link_debug(link
, "Failed to parse route %s", route_str
);
2962 *prefixlen_str
++ = '\0';
2964 r
= sscanf(prefixlen_str
, "%hhu/%hhu/%"SCNu32
"/%hhu/"USEC_FMT
, &prefixlen
, &tos
, &priority
, &table
, &lifetime
);
2966 log_link_debug(link
,
2967 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
2972 r
= in_addr_from_string_auto(route_str
, &family
, &route_dst
);
2974 log_link_debug_errno(link
, r
, "Failed to parse route destination %s: %m", route_str
);
2978 r
= route_add(link
, family
, &route_dst
, prefixlen
, tos
, priority
, table
, &route
);
2980 return log_link_error_errno(link
, r
, "Failed to add route: %m");
2982 if (lifetime
!= USEC_INFINITY
&& !kernel_route_expiration_supported()) {
2983 r
= sd_event_add_time(link
->manager
->event
, &expire
, clock_boottime_or_monotonic(), lifetime
,
2984 0, route_expire_handler
, route
);
2986 log_link_warning_errno(link
, r
, "Could not arm route expiration handler: %m");
2989 route
->lifetime
= lifetime
;
2990 sd_event_source_unref(route
->expire
);
2991 route
->expire
= TAKE_PTR(expire
);
2995 if (dhcp4_address
) {
2996 r
= in_addr_from_string(AF_INET
, dhcp4_address
, &address
);
2998 log_link_debug_errno(link
, r
, "Failed to parse DHCPv4 address %s: %m", dhcp4_address
);
2999 goto dhcp4_address_fail
;
3002 r
= sd_dhcp_client_new(&link
->dhcp_client
, link
->network
? link
->network
->dhcp_anonymize
: 0);
3004 return log_link_error_errno(link
, r
, "Failed to create DHCPv4 client: %m");
3006 r
= sd_dhcp_client_set_request_address(link
->dhcp_client
, &address
.in
);
3008 return log_link_error_errno(link
, r
, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address
);
3013 if (ipv4ll_address
) {
3014 r
= in_addr_from_string(AF_INET
, ipv4ll_address
, &address
);
3016 log_link_debug_errno(link
, r
, "Failed to parse IPv4LL address %s: %m", ipv4ll_address
);
3017 goto ipv4ll_address_fail
;
3020 r
= sd_ipv4ll_new(&link
->ipv4ll
);
3022 return log_link_error_errno(link
, r
, "Failed to create IPv4LL client: %m");
3024 r
= sd_ipv4ll_set_address(link
->ipv4ll
, &address
.in
);
3026 return log_link_error_errno(link
, r
, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address
);
3029 ipv4ll_address_fail
:
3034 int link_add(Manager
*m
, sd_netlink_message
*message
, Link
**ret
) {
3036 _cleanup_(udev_device_unrefp
) struct udev_device
*device
= NULL
;
3037 char ifindex_str
[2 + DECIMAL_STR_MAX(int)];
3045 r
= link_new(m
, message
, ret
);
3051 log_link_debug(link
, "Link %d added", link
->ifindex
);
3053 r
= link_load(link
);
3057 if (detect_container() <= 0) {
3058 /* not in a container, udev will be around */
3059 sprintf(ifindex_str
, "n%d", link
->ifindex
);
3060 device
= udev_device_new_from_device_id(m
->udev
, ifindex_str
);
3062 r
= log_link_warning_errno(link
, errno
, "Could not find udev device: %m");
3066 if (udev_device_get_is_initialized(device
) <= 0) {
3068 log_link_debug(link
, "link pending udev initialization...");
3072 r
= link_initialized(link
, device
);
3076 /* we are calling a callback directly, so must take a ref */
3079 r
= link_initialized_and_synced(m
->rtnl
, NULL
, link
);
3086 link_enter_failed(link
);
3090 int link_ipv6ll_gained(Link
*link
, const struct in6_addr
*address
) {
3095 log_link_info(link
, "Gained IPv6LL");
3097 link
->ipv6ll_address
= *address
;
3098 link_check_ready(link
);
3100 if (!IN_SET(link
->state
, LINK_STATE_PENDING
, LINK_STATE_UNMANAGED
, LINK_STATE_FAILED
)) {
3101 r
= link_acquire_ipv6_conf(link
);
3103 link_enter_failed(link
);
3111 static int link_carrier_gained(Link
*link
) {
3116 if (!IN_SET(link
->state
, LINK_STATE_PENDING
, LINK_STATE_UNMANAGED
, LINK_STATE_FAILED
)) {
3117 r
= link_acquire_conf(link
);
3119 link_enter_failed(link
);
3123 r
= link_enter_set_addresses(link
);
3128 r
= link_handle_bound_by_list(link
);
3135 static int link_carrier_lost(Link
*link
) {
3140 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
3141 setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3142 configuration and stop the clients as well. */
3143 if (link
->setting_mtu
)
3146 r
= link_stop_clients(link
);
3148 link_enter_failed(link
);
3152 if (link_dhcp4_server_enabled(link
))
3153 (void) sd_dhcp_server_stop(link
->dhcp_server
);
3155 r
= link_drop_config(link
);
3159 if (!IN_SET(link
->state
, LINK_STATE_UNMANAGED
, LINK_STATE_PENDING
)) {
3160 log_link_debug(link
, "State is %s, dropping config", link_state_to_string(link
->state
));
3161 r
= link_drop_foreign_config(link
);
3166 r
= link_handle_bound_by_list(link
);
3173 int link_carrier_reset(Link
*link
) {
3178 if (link_has_carrier(link
)) {
3179 r
= link_carrier_lost(link
);
3183 r
= link_carrier_gained(link
);
3187 log_link_info(link
, "Reset carrier");
3193 int link_update(Link
*link
, sd_netlink_message
*m
) {
3194 struct ether_addr mac
;
3197 bool had_carrier
, carrier_gained
, carrier_lost
;
3201 assert(link
->ifname
);
3204 if (link
->state
== LINK_STATE_LINGER
) {
3206 log_link_info(link
, "Link readded");
3207 link_set_state(link
, LINK_STATE_ENSLAVING
);
3209 r
= link_new_carrier_maps(link
);
3214 r
= sd_netlink_message_read_string(m
, IFLA_IFNAME
, &ifname
);
3215 if (r
>= 0 && !streq(ifname
, link
->ifname
)) {
3216 log_link_info(link
, "Interface name change detected, %s has been renamed to %s.", link
->ifname
, ifname
);
3218 link_free_carrier_maps(link
);
3220 r
= free_and_strdup(&link
->ifname
, ifname
);
3224 r
= link_new_carrier_maps(link
);
3229 r
= sd_netlink_message_read_u32(m
, IFLA_MTU
, &mtu
);
3230 if (r
>= 0 && mtu
> 0) {
3232 if (!link
->original_mtu
) {
3233 link
->original_mtu
= mtu
;
3234 log_link_debug(link
, "Saved original MTU: %" PRIu32
, link
->original_mtu
);
3237 if (link
->dhcp_client
) {
3238 r
= sd_dhcp_client_set_mtu(link
->dhcp_client
,
3241 log_link_warning_errno(link
, r
, "Could not update MTU in DHCP client: %m");
3247 r
= sd_radv_set_mtu(link
->radv
, link
->mtu
);
3249 return log_link_warning_errno(link
, r
, "Could not set MTU for Router Advertisement: %m");
3253 /* The kernel may broadcast NEWLINK messages without the MAC address
3254 set, simply ignore them. */
3255 r
= sd_netlink_message_read_ether_addr(m
, IFLA_ADDRESS
, &mac
);
3257 if (memcmp(link
->mac
.ether_addr_octet
, mac
.ether_addr_octet
,
3260 memcpy(link
->mac
.ether_addr_octet
, mac
.ether_addr_octet
,
3263 log_link_debug(link
, "MAC address: "
3264 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3265 mac
.ether_addr_octet
[0],
3266 mac
.ether_addr_octet
[1],
3267 mac
.ether_addr_octet
[2],
3268 mac
.ether_addr_octet
[3],
3269 mac
.ether_addr_octet
[4],
3270 mac
.ether_addr_octet
[5]);
3273 r
= sd_ipv4ll_set_mac(link
->ipv4ll
, &link
->mac
);
3275 return log_link_warning_errno(link
, r
, "Could not update MAC address in IPv4LL client: %m");
3278 if (link
->dhcp_client
) {
3279 r
= sd_dhcp_client_set_mac(link
->dhcp_client
,
3280 (const uint8_t *) &link
->mac
,
3284 return log_link_warning_errno(link
, r
, "Could not update MAC address in DHCP client: %m");
3286 switch (link
->network
->dhcp_client_identifier
) {
3287 case DHCP_CLIENT_ID_DUID
: {
3288 const DUID
*duid
= link_duid(link
);
3290 r
= sd_dhcp_client_set_iaid_duid(link
->dhcp_client
,
3291 link
->network
->iaid
,
3293 duid
->raw_data_len
> 0 ? duid
->raw_data
: NULL
,
3294 duid
->raw_data_len
);
3296 return log_link_warning_errno(link
, r
, "Could not update DUID/IAID in DHCP client: %m");
3299 case DHCP_CLIENT_ID_DUID_ONLY
: {
3300 const DUID
*duid
= link_duid(link
);
3302 r
= sd_dhcp_client_set_duid(link
->dhcp_client
,
3304 duid
->raw_data_len
> 0 ? duid
->raw_data
: NULL
,
3305 duid
->raw_data_len
);
3307 return log_link_warning_errno(link
, r
, "Could not update DUID in DHCP client: %m");
3310 case DHCP_CLIENT_ID_MAC
:
3311 r
= sd_dhcp_client_set_client_id(link
->dhcp_client
,
3313 (const uint8_t *)&link
->mac
,
3316 return log_link_warning_errno(link
, r
, "Could not update MAC client id in DHCP client: %m");
3319 assert_not_reached("Unknown client identifier type.");
3323 if (link
->dhcp6_client
) {
3324 const DUID
* duid
= link_duid(link
);
3326 r
= sd_dhcp6_client_set_mac(link
->dhcp6_client
,
3327 (const uint8_t *) &link
->mac
,
3331 return log_link_warning_errno(link
, r
, "Could not update MAC address in DHCPv6 client: %m");
3333 r
= sd_dhcp6_client_set_iaid(link
->dhcp6_client
,
3334 link
->network
->iaid
);
3336 return log_link_warning_errno(link
, r
, "Could not update DHCPv6 IAID: %m");
3338 r
= sd_dhcp6_client_set_duid(link
->dhcp6_client
,
3340 duid
->raw_data_len
> 0 ? duid
->raw_data
: NULL
,
3341 duid
->raw_data_len
);
3343 return log_link_warning_errno(link
, r
, "Could not update DHCPv6 DUID: %m");
3347 r
= sd_radv_set_mac(link
->radv
, &link
->mac
);
3349 return log_link_warning_errno(link
, r
, "Could not update MAC for Router Advertisement: %m");
3353 r
= sd_ndisc_set_mac(link
->ndisc
, &link
->mac
);
3355 return log_link_warning_errno(link
, r
, "Could not update MAC for ndisc: %m");
3360 had_carrier
= link_has_carrier(link
);
3362 r
= link_update_flags(link
, m
);
3366 r
= link_update_lldp(link
);
3370 carrier_gained
= !had_carrier
&& link_has_carrier(link
);
3371 carrier_lost
= had_carrier
&& !link_has_carrier(link
);
3373 if (carrier_gained
) {
3374 log_link_info(link
, "Gained carrier");
3376 r
= link_carrier_gained(link
);
3379 } else if (carrier_lost
) {
3380 log_link_info(link
, "Lost carrier");
3382 r
= link_carrier_lost(link
);
3390 static void print_link_hashmap(FILE *f
, const char *prefix
, Hashmap
* h
) {
3398 if (hashmap_isempty(h
))
3402 HASHMAP_FOREACH(link
, h
, i
) {
3406 fprintf(f
, "%i", link
->ifindex
);
3413 int link_save(Link
*link
) {
3414 _cleanup_free_
char *temp_path
= NULL
;
3415 _cleanup_fclose_
FILE *f
= NULL
;
3416 const char *admin_state
, *oper_state
;
3423 assert(link
->state_file
);
3424 assert(link
->lease_file
);
3425 assert(link
->manager
);
3427 if (link
->state
== LINK_STATE_LINGER
) {
3428 unlink(link
->state_file
);
3432 link_lldp_save(link
);
3434 admin_state
= link_state_to_string(link
->state
);
3435 assert(admin_state
);
3437 oper_state
= link_operstate_to_string(link
->operstate
);
3440 r
= fopen_temporary(link
->state_file
, &f
, &temp_path
);
3444 (void) __fsetlocking(f
, FSETLOCKING_BYCALLER
);
3445 (void) fchmod(fileno(f
), 0644);
3448 "# This is private data. Do not parse.\n"
3451 admin_state
, oper_state
);
3453 if (link
->network
) {
3455 sd_dhcp6_lease
*dhcp6_lease
= NULL
;
3456 const char *dhcp_domainname
= NULL
;
3457 char **dhcp6_domains
= NULL
;
3458 char **dhcp_domains
= NULL
;
3461 fprintf(f
, "REQUIRED_FOR_ONLINE=%s\n",
3462 yes_no(link
->network
->required_for_online
));
3464 if (link
->dhcp6_client
) {
3465 r
= sd_dhcp6_client_get_lease(link
->dhcp6_client
, &dhcp6_lease
);
3466 if (r
< 0 && r
!= -ENOMSG
)
3467 log_link_debug(link
, "No DHCPv6 lease");
3470 fprintf(f
, "NETWORK_FILE=%s\n", link
->network
->filename
);
3475 for (j
= 0; j
< link
->network
->n_dns
; j
++) {
3476 _cleanup_free_
char *b
= NULL
;
3478 r
= in_addr_to_string(link
->network
->dns
[j
].family
,
3479 &link
->network
->dns
[j
].address
, &b
);
3481 log_debug_errno(r
, "Failed to format address, ignoring: %m");
3491 if (link
->network
->dhcp_use_dns
&&
3493 const struct in_addr
*addresses
;
3495 r
= sd_dhcp_lease_get_dns(link
->dhcp_lease
, &addresses
);
3499 serialize_in_addrs(f
, addresses
, r
);
3504 if (link
->network
->dhcp_use_dns
&& dhcp6_lease
) {
3505 struct in6_addr
*in6_addrs
;
3507 r
= sd_dhcp6_lease_get_dns(dhcp6_lease
, &in6_addrs
);
3511 serialize_in6_addrs(f
, in6_addrs
, r
);
3516 /* Make sure to flush out old entries before we use the NDISC data */
3519 if (link
->network
->dhcp_use_dns
&& link
->ndisc_rdnss
) {
3522 SET_FOREACH(dd
, link
->ndisc_rdnss
, i
) {
3526 serialize_in6_addrs(f
, &dd
->address
, 1);
3535 fputstrv(f
, link
->network
->ntp
, NULL
, &space
);
3537 if (link
->network
->dhcp_use_ntp
&&
3539 const struct in_addr
*addresses
;
3541 r
= sd_dhcp_lease_get_ntp(link
->dhcp_lease
, &addresses
);
3545 serialize_in_addrs(f
, addresses
, r
);
3550 if (link
->network
->dhcp_use_ntp
&& dhcp6_lease
) {
3551 struct in6_addr
*in6_addrs
;
3554 r
= sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease
,
3559 serialize_in6_addrs(f
, in6_addrs
, r
);
3563 r
= sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease
, &hosts
);
3565 fputstrv(f
, hosts
, NULL
, &space
);
3570 if (link
->network
->dhcp_use_domains
!= DHCP_USE_DOMAINS_NO
) {
3571 if (link
->dhcp_lease
) {
3572 (void) sd_dhcp_lease_get_domainname(link
->dhcp_lease
, &dhcp_domainname
);
3573 (void) sd_dhcp_lease_get_search_domains(link
->dhcp_lease
, &dhcp_domains
);
3576 (void) sd_dhcp6_lease_get_domains(dhcp6_lease
, &dhcp6_domains
);
3579 fputs("DOMAINS=", f
);
3581 fputstrv(f
, link
->network
->search_domains
, NULL
, &space
);
3583 if (link
->network
->dhcp_use_domains
== DHCP_USE_DOMAINS_YES
) {
3586 if (dhcp_domainname
)
3587 fputs_with_space(f
, dhcp_domainname
, NULL
, &space
);
3589 fputstrv(f
, dhcp_domains
, NULL
, &space
);
3591 fputstrv(f
, dhcp6_domains
, NULL
, &space
);
3593 SET_FOREACH(dd
, link
->ndisc_dnssl
, i
)
3594 fputs_with_space(f
, NDISC_DNSSL_DOMAIN(dd
), NULL
, &space
);
3599 fputs("ROUTE_DOMAINS=", f
);
3601 fputstrv(f
, link
->network
->route_domains
, NULL
, &space
);
3603 if (link
->network
->dhcp_use_domains
== DHCP_USE_DOMAINS_ROUTE
) {
3606 if (dhcp_domainname
)
3607 fputs_with_space(f
, dhcp_domainname
, NULL
, &space
);
3609 fputstrv(f
, dhcp_domains
, NULL
, &space
);
3611 fputstrv(f
, dhcp6_domains
, NULL
, &space
);
3613 SET_FOREACH(dd
, link
->ndisc_dnssl
, i
)
3614 fputs_with_space(f
, NDISC_DNSSL_DOMAIN(dd
), NULL
, &space
);
3619 fprintf(f
, "LLMNR=%s\n",
3620 resolve_support_to_string(link
->network
->llmnr
));
3621 fprintf(f
, "MDNS=%s\n",
3622 resolve_support_to_string(link
->network
->mdns
));
3624 if (link
->network
->dnssec_mode
!= _DNSSEC_MODE_INVALID
)
3625 fprintf(f
, "DNSSEC=%s\n",
3626 dnssec_mode_to_string(link
->network
->dnssec_mode
));
3628 if (!set_isempty(link
->network
->dnssec_negative_trust_anchors
)) {
3631 fputs("DNSSEC_NTA=", f
);
3633 SET_FOREACH(n
, link
->network
->dnssec_negative_trust_anchors
, i
)
3634 fputs_with_space(f
, n
, NULL
, &space
);
3638 fputs("ADDRESSES=", f
);
3640 SET_FOREACH(a
, link
->addresses
, i
) {
3641 _cleanup_free_
char *address_str
= NULL
;
3643 r
= in_addr_to_string(a
->family
, &a
->in_addr
, &address_str
);
3647 fprintf(f
, "%s%s/%u", space
? " " : "", address_str
, a
->prefixlen
);
3652 fputs("ROUTES=", f
);
3654 SET_FOREACH(route
, link
->routes
, i
) {
3655 _cleanup_free_
char *route_str
= NULL
;
3657 r
= in_addr_to_string(route
->family
, &route
->dst
, &route_str
);
3661 fprintf(f
, "%s%s/%hhu/%hhu/%"PRIu32
"/%"PRIu32
"/"USEC_FMT
,
3662 space
? " " : "", route_str
,
3663 route
->dst_prefixlen
, route
->tos
, route
->priority
, route
->table
, route
->lifetime
);
3670 print_link_hashmap(f
, "CARRIER_BOUND_TO=", link
->bound_to_links
);
3671 print_link_hashmap(f
, "CARRIER_BOUND_BY=", link
->bound_by_links
);
3673 if (link
->dhcp_lease
) {
3674 struct in_addr address
;
3675 const char *tz
= NULL
;
3677 assert(link
->network
);
3679 r
= sd_dhcp_lease_get_timezone(link
->dhcp_lease
, &tz
);
3681 fprintf(f
, "TIMEZONE=%s\n", tz
);
3683 r
= sd_dhcp_lease_get_address(link
->dhcp_lease
, &address
);
3685 fputs("DHCP4_ADDRESS=", f
);
3686 serialize_in_addrs(f
, &address
, 1);
3690 r
= dhcp_lease_save(link
->dhcp_lease
, link
->lease_file
);
3698 unlink(link
->lease_file
);
3701 struct in_addr address
;
3703 r
= sd_ipv4ll_get_address(link
->ipv4ll
, &address
);
3705 fputs("IPV4LL_ADDRESS=", f
);
3706 serialize_in_addrs(f
, &address
, 1);
3711 r
= fflush_and_check(f
);
3715 if (rename(temp_path
, link
->state_file
) < 0) {
3723 (void) unlink(link
->state_file
);
3725 (void) unlink(temp_path
);
3727 return log_link_error_errno(link
, r
, "Failed to save link data to %s: %m", link
->state_file
);
3730 /* The serialized state in /run is no longer up-to-date. */
3731 void link_dirty(Link
*link
) {
3736 /* mark manager dirty as link is dirty */
3737 manager_dirty(link
->manager
);
3739 r
= set_ensure_allocated(&link
->manager
->dirty_links
, NULL
);
3741 /* allocation errors are ignored */
3744 r
= set_put(link
->manager
->dirty_links
, link
);
3746 /* don't take another ref if the link was already dirty */
3752 /* The serialized state in /run is up-to-date */
3753 void link_clean(Link
*link
) {
3755 assert(link
->manager
);
3757 set_remove(link
->manager
->dirty_links
, link
);
3761 static const char* const link_state_table
[_LINK_STATE_MAX
] = {
3762 [LINK_STATE_PENDING
] = "pending",
3763 [LINK_STATE_ENSLAVING
] = "configuring",
3764 [LINK_STATE_SETTING_ADDRESSES
] = "configuring",
3765 [LINK_STATE_SETTING_ROUTES
] = "configuring",
3766 [LINK_STATE_CONFIGURED
] = "configured",
3767 [LINK_STATE_UNMANAGED
] = "unmanaged",
3768 [LINK_STATE_FAILED
] = "failed",
3769 [LINK_STATE_LINGER
] = "linger",
3772 DEFINE_STRING_TABLE_LOOKUP(link_state
, LinkState
);
3774 static const char* const link_operstate_table
[_LINK_OPERSTATE_MAX
] = {
3775 [LINK_OPERSTATE_OFF
] = "off",
3776 [LINK_OPERSTATE_NO_CARRIER
] = "no-carrier",
3777 [LINK_OPERSTATE_DORMANT
] = "dormant",
3778 [LINK_OPERSTATE_CARRIER
] = "carrier",
3779 [LINK_OPERSTATE_DEGRADED
] = "degraded",
3780 [LINK_OPERSTATE_ROUTABLE
] = "routable",
3783 DEFINE_STRING_TABLE_LOOKUP(link_operstate
, LinkOperationalState
);