1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 #include <netinet/ether.h>
5 #include <linux/can/netlink.h>
8 #include "alloc-util.h"
10 #include "dhcp-identifier.h"
11 #include "dhcp-lease-internal.h"
15 #include "missing_network.h"
16 #include "netdev/vrf.h"
17 #include "netlink-util.h"
18 #include "network-internal.h"
19 #include "networkd-ipv6-proxy-ndp.h"
20 #include "networkd-lldp-tx.h"
21 #include "networkd-manager.h"
22 #include "networkd-ndisc.h"
23 #include "networkd-neighbor.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"
31 #include "sysctl-util.h"
32 #include "tmpfile-util.h"
33 #include "udev-util.h"
37 uint32_t link_get_vrf_table(Link
*link
) {
38 return link
->network
->vrf
? VRF(link
->network
->vrf
)->table
: RT_TABLE_MAIN
;
41 uint32_t link_get_dhcp_route_table(Link
*link
) {
42 /* When the interface is part of an VRF use the VRFs routing table, unless
43 * another table is explicitly specified. */
44 if (link
->network
->dhcp_route_table_set
)
45 return link
->network
->dhcp_route_table
;
46 return link_get_vrf_table(link
);
49 uint32_t link_get_ipv6_accept_ra_route_table(Link
*link
) {
50 if (link
->network
->ipv6_accept_ra_route_table_set
)
51 return link
->network
->ipv6_accept_ra_route_table
;
52 return link_get_vrf_table(link
);
55 DUID
* link_get_duid(Link
*link
) {
56 if (link
->network
->duid
.type
!= _DUID_TYPE_INVALID
)
57 return &link
->network
->duid
;
59 return &link
->manager
->duid
;
62 static bool link_dhcp6_enabled(Link
*link
) {
65 if (!socket_ipv6_is_supported())
68 if (link
->flags
& IFF_LOOPBACK
)
74 if (link
->network
->bond
)
77 if (manager_sysctl_ipv6_enabled(link
->manager
) == 0)
80 return link
->network
->dhcp
& ADDRESS_FAMILY_IPV6
;
83 static bool link_dhcp4_enabled(Link
*link
) {
86 if (link
->flags
& IFF_LOOPBACK
)
92 if (link
->network
->bond
)
95 return link
->network
->dhcp
& ADDRESS_FAMILY_IPV4
;
98 static bool link_dhcp4_server_enabled(Link
*link
) {
101 if (link
->flags
& IFF_LOOPBACK
)
107 if (link
->network
->bond
)
110 return link
->network
->dhcp_server
;
113 bool link_ipv4ll_enabled(Link
*link
) {
116 if (link
->flags
& IFF_LOOPBACK
)
122 if (STRPTR_IN_SET(link
->kind
, "vrf", "wireguard"))
125 if (link
->network
->bond
)
128 return link
->network
->link_local
& ADDRESS_FAMILY_IPV4
;
131 bool link_ipv4ll_fallback_enabled(Link
*link
) {
134 if (link
->flags
& IFF_LOOPBACK
)
140 if (STRPTR_IN_SET(link
->kind
, "vrf", "wireguard"))
143 if (link
->network
->bond
)
146 return link
->network
->link_local
& ADDRESS_FAMILY_FALLBACK_IPV4
;
149 static bool link_ipv6ll_enabled(Link
*link
) {
152 if (!socket_ipv6_is_supported())
155 if (link
->flags
& IFF_LOOPBACK
)
161 if (STRPTR_IN_SET(link
->kind
, "vrf", "wireguard"))
164 if (link
->network
->bond
)
167 if (manager_sysctl_ipv6_enabled(link
->manager
) == 0)
170 return link
->network
->link_local
& ADDRESS_FAMILY_IPV6
;
173 static bool link_ipv6_enabled(Link
*link
) {
176 if (!socket_ipv6_is_supported())
179 if (link
->network
->bond
)
182 if (manager_sysctl_ipv6_enabled(link
->manager
) == 0)
185 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
186 return link_ipv6ll_enabled(link
) || network_has_static_ipv6_addresses(link
->network
);
189 static bool link_radv_enabled(Link
*link
) {
192 if (!link_ipv6ll_enabled(link
))
195 return link
->network
->router_prefix_delegation
!= RADV_PREFIX_DELEGATION_NONE
;
198 static bool link_lldp_rx_enabled(Link
*link
) {
201 if (link
->flags
& IFF_LOOPBACK
)
204 if (link
->iftype
!= ARPHRD_ETHER
)
210 /* LLDP should be handled on bridge slaves as those have a direct
211 * connection to their peers not on the bridge master. Linux doesn't
212 * even (by default) forward lldp packets to the bridge master.*/
213 if (streq_ptr("bridge", link
->kind
))
216 return link
->network
->lldp_mode
!= LLDP_MODE_NO
;
219 static bool link_lldp_emit_enabled(Link
*link
) {
222 if (link
->flags
& IFF_LOOPBACK
)
225 if (link
->iftype
!= ARPHRD_ETHER
)
231 return link
->network
->lldp_emit
!= LLDP_EMIT_NO
;
234 static bool link_ipv4_forward_enabled(Link
*link
) {
237 if (link
->flags
& IFF_LOOPBACK
)
243 if (link
->network
->ip_forward
== _ADDRESS_FAMILY_BOOLEAN_INVALID
)
246 return link
->network
->ip_forward
& ADDRESS_FAMILY_IPV4
;
249 static bool link_ipv6_forward_enabled(Link
*link
) {
252 if (!socket_ipv6_is_supported())
255 if (link
->flags
& IFF_LOOPBACK
)
261 if (link
->network
->ip_forward
== _ADDRESS_FAMILY_BOOLEAN_INVALID
)
264 if (manager_sysctl_ipv6_enabled(link
->manager
) == 0)
267 return link
->network
->ip_forward
& ADDRESS_FAMILY_IPV6
;
270 static bool link_proxy_arp_enabled(Link
*link
) {
273 if (link
->flags
& IFF_LOOPBACK
)
279 if (link
->network
->proxy_arp
< 0)
285 static bool link_ipv6_accept_ra_enabled(Link
*link
) {
288 if (!socket_ipv6_is_supported())
291 if (link
->flags
& IFF_LOOPBACK
)
297 if (!link_ipv6ll_enabled(link
))
300 /* If unset use system default (enabled if local forwarding is disabled.
301 * disabled if local forwarding is enabled).
302 * If set, ignore or enforce RA independent of local forwarding state.
304 if (link
->network
->ipv6_accept_ra
< 0)
305 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
306 return !link_ipv6_forward_enabled(link
);
307 else if (link
->network
->ipv6_accept_ra
> 0)
308 /* accept RA even if ip_forward is enabled */
315 static IPv6PrivacyExtensions
link_ipv6_privacy_extensions(Link
*link
) {
318 if (!socket_ipv6_is_supported())
319 return _IPV6_PRIVACY_EXTENSIONS_INVALID
;
321 if (link
->flags
& IFF_LOOPBACK
)
322 return _IPV6_PRIVACY_EXTENSIONS_INVALID
;
325 return _IPV6_PRIVACY_EXTENSIONS_INVALID
;
327 return link
->network
->ipv6_privacy_extensions
;
330 static int link_enable_ipv6(Link
*link
) {
334 if (link
->flags
& IFF_LOOPBACK
)
337 disabled
= !link_ipv6_enabled(link
);
339 r
= sysctl_write_ip_property_boolean(AF_INET6
, link
->ifname
, "disable_ipv6", disabled
);
341 log_link_warning_errno(link
, r
, "Cannot %s IPv6 for interface %s: %m",
342 enable_disable(!disabled
), link
->ifname
);
344 log_link_info(link
, "IPv6 successfully %sd", enable_disable(!disabled
));
349 static bool link_is_enslaved(Link
*link
) {
350 if (link
->flags
& IFF_SLAVE
)
351 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
354 if (!link
->enslaved_raw
)
360 if (link
->network
->bridge
)
361 /* TODO: support the case when link is not managed by networkd. */
367 static void link_update_master_operstate(Link
*link
, NetDev
*netdev
) {
373 if (link_get(link
->manager
, netdev
->ifindex
, &master
) < 0)
376 link_update_operstate(master
, true);
379 void link_update_operstate(Link
*link
, bool also_update_master
) {
380 LinkOperationalState operstate
;
385 if (link
->kernel_operstate
== IF_OPER_DORMANT
)
386 operstate
= LINK_OPERSTATE_DORMANT
;
387 else if (link_has_carrier(link
)) {
389 uint8_t scope
= RT_SCOPE_NOWHERE
;
391 /* if we have carrier, check what addresses we have */
392 SET_FOREACH(address
, link
->addresses
, i
) {
393 if (!address_is_ready(address
))
396 if (address
->scope
< scope
)
397 scope
= address
->scope
;
400 /* for operstate we also take foreign addresses into account */
401 SET_FOREACH(address
, link
->addresses_foreign
, i
) {
402 if (!address_is_ready(address
))
405 if (address
->scope
< scope
)
406 scope
= address
->scope
;
409 if (scope
< RT_SCOPE_SITE
)
410 /* universally accessible addresses found */
411 operstate
= LINK_OPERSTATE_ROUTABLE
;
412 else if (scope
< RT_SCOPE_HOST
)
413 /* only link or site local addresses found */
414 operstate
= LINK_OPERSTATE_DEGRADED
;
416 /* no useful addresses found */
417 operstate
= LINK_OPERSTATE_CARRIER
;
418 } else if (link
->flags
& IFF_UP
)
419 operstate
= LINK_OPERSTATE_NO_CARRIER
;
421 operstate
= LINK_OPERSTATE_OFF
;
423 if (IN_SET(operstate
, LINK_OPERSTATE_DEGRADED
, LINK_OPERSTATE_CARRIER
) &&
424 link_is_enslaved(link
))
425 operstate
= LINK_OPERSTATE_ENSLAVED
;
427 if (operstate
>= LINK_OPERSTATE_CARRIER
) {
430 SET_FOREACH(slave
, link
->slaves
, i
) {
431 link_update_operstate(slave
, false);
433 if (slave
->operstate
< LINK_OPERSTATE_CARRIER
)
434 operstate
= LINK_OPERSTATE_DEGRADED_CARRIER
;
438 if (link
->operstate
!= operstate
) {
439 link
->operstate
= operstate
;
440 link_send_changed(link
, "OperationalState", NULL
);
444 if (also_update_master
&& link
->network
) {
445 link_update_master_operstate(link
, link
->network
->bond
);
446 link_update_master_operstate(link
, link
->network
->bridge
);
450 #define FLAG_STRING(string, flag, old, new) \
451 (((old ^ new) & flag) \
452 ? ((old & flag) ? (" -" string) : (" +" string)) \
455 static int link_update_flags(Link
*link
, sd_netlink_message
*m
) {
456 unsigned flags
, unknown_flags_added
, unknown_flags_removed
, unknown_flags
;
462 r
= sd_rtnl_message_link_get_flags(m
, &flags
);
464 return log_link_warning_errno(link
, r
, "Could not get link flags: %m");
466 r
= sd_netlink_message_read_u8(m
, IFLA_OPERSTATE
, &operstate
);
468 /* if we got a message without operstate, take it to mean
469 the state was unchanged */
470 operstate
= link
->kernel_operstate
;
472 if ((link
->flags
== flags
) && (link
->kernel_operstate
== operstate
))
475 if (link
->flags
!= flags
) {
476 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",
477 FLAG_STRING("LOOPBACK", IFF_LOOPBACK
, link
->flags
, flags
),
478 FLAG_STRING("MASTER", IFF_MASTER
, link
->flags
, flags
),
479 FLAG_STRING("SLAVE", IFF_SLAVE
, link
->flags
, flags
),
480 FLAG_STRING("UP", IFF_UP
, link
->flags
, flags
),
481 FLAG_STRING("DORMANT", IFF_DORMANT
, link
->flags
, flags
),
482 FLAG_STRING("LOWER_UP", IFF_LOWER_UP
, link
->flags
, flags
),
483 FLAG_STRING("RUNNING", IFF_RUNNING
, link
->flags
, flags
),
484 FLAG_STRING("MULTICAST", IFF_MULTICAST
, link
->flags
, flags
),
485 FLAG_STRING("BROADCAST", IFF_BROADCAST
, link
->flags
, flags
),
486 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT
, link
->flags
, flags
),
487 FLAG_STRING("PROMISC", IFF_PROMISC
, link
->flags
, flags
),
488 FLAG_STRING("ALLMULTI", IFF_ALLMULTI
, link
->flags
, flags
),
489 FLAG_STRING("PORTSEL", IFF_PORTSEL
, link
->flags
, flags
),
490 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA
, link
->flags
, flags
),
491 FLAG_STRING("DYNAMIC", IFF_DYNAMIC
, link
->flags
, flags
),
492 FLAG_STRING("NOARP", IFF_NOARP
, link
->flags
, flags
),
493 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS
, link
->flags
, flags
),
494 FLAG_STRING("DEBUG", IFF_DEBUG
, link
->flags
, flags
),
495 FLAG_STRING("ECHO", IFF_ECHO
, link
->flags
, flags
));
497 unknown_flags
= ~(IFF_LOOPBACK
| IFF_MASTER
| IFF_SLAVE
| IFF_UP
|
498 IFF_DORMANT
| IFF_LOWER_UP
| IFF_RUNNING
|
499 IFF_MULTICAST
| IFF_BROADCAST
| IFF_POINTOPOINT
|
500 IFF_PROMISC
| IFF_ALLMULTI
| IFF_PORTSEL
|
501 IFF_AUTOMEDIA
| IFF_DYNAMIC
| IFF_NOARP
|
502 IFF_NOTRAILERS
| IFF_DEBUG
| IFF_ECHO
);
503 unknown_flags_added
= ((link
->flags
^ flags
) & flags
& unknown_flags
);
504 unknown_flags_removed
= ((link
->flags
^ flags
) & link
->flags
& unknown_flags
);
506 /* link flags are currently at most 18 bits, let's align to
508 if (unknown_flags_added
)
510 "Unknown link flags gained: %#.5x (ignoring)",
511 unknown_flags_added
);
513 if (unknown_flags_removed
)
515 "Unknown link flags lost: %#.5x (ignoring)",
516 unknown_flags_removed
);
520 link
->kernel_operstate
= operstate
;
522 link_update_operstate(link
, true);
527 DEFINE_TRIVIAL_CLEANUP_FUNC(Link
*, link_unref
);
529 static int link_new(Manager
*manager
, sd_netlink_message
*message
, Link
**ret
) {
530 _cleanup_(link_unrefp
) Link
*link
= NULL
;
532 const char *ifname
, *kind
= NULL
;
534 unsigned short iftype
;
540 /* check for link kind */
541 r
= sd_netlink_message_enter_container(message
, IFLA_LINKINFO
);
543 (void) sd_netlink_message_read_string(message
, IFLA_INFO_KIND
, &kind
);
544 r
= sd_netlink_message_exit_container(message
);
549 r
= sd_netlink_message_get_type(message
, &type
);
552 else if (type
!= RTM_NEWLINK
)
555 r
= sd_rtnl_message_link_get_ifindex(message
, &ifindex
);
558 else if (ifindex
<= 0)
561 r
= sd_rtnl_message_link_get_type(message
, &iftype
);
565 r
= sd_netlink_message_read_string(message
, IFLA_IFNAME
, &ifname
);
576 .state
= LINK_STATE_PENDING
,
577 .rtnl_extended_attrs
= true,
582 link
->ifname
= strdup(ifname
);
587 link
->kind
= strdup(kind
);
592 r
= sd_netlink_message_read_u32(message
, IFLA_MASTER
, (uint32_t *)&link
->master_ifindex
);
594 log_link_debug_errno(link
, r
, "New device has no master, continuing without");
596 r
= sd_netlink_message_read_ether_addr(message
, IFLA_ADDRESS
, &link
->mac
);
598 log_link_debug_errno(link
, r
, "MAC address not found for new device, continuing without");
600 if (asprintf(&link
->state_file
, "/run/systemd/netif/links/%d", link
->ifindex
) < 0)
603 if (asprintf(&link
->lease_file
, "/run/systemd/netif/leases/%d", link
->ifindex
) < 0)
606 if (asprintf(&link
->lldp_file
, "/run/systemd/netif/lldp/%d", link
->ifindex
) < 0)
609 r
= hashmap_ensure_allocated(&manager
->links
, NULL
);
613 r
= hashmap_put(manager
->links
, INT_TO_PTR(link
->ifindex
), link
);
617 r
= link_update_flags(link
, message
);
621 *ret
= TAKE_PTR(link
);
626 static Link
*link_free(Link
*link
) {
634 while ((route
= set_first(link
->routes
)))
637 while ((route
= set_first(link
->routes_foreign
)))
640 link
->routes
= set_free(link
->routes
);
641 link
->routes_foreign
= set_free(link
->routes_foreign
);
643 while ((address
= set_first(link
->addresses
)))
644 address_free(address
);
646 while ((address
= set_first(link
->addresses_foreign
)))
647 address_free(address
);
649 link
->addresses
= set_free(link
->addresses
);
650 link
->addresses_foreign
= set_free(link
->addresses_foreign
);
652 while ((address
= link
->pool_addresses
)) {
653 LIST_REMOVE(addresses
, link
->pool_addresses
, address
);
654 address_free(address
);
657 sd_dhcp_server_unref(link
->dhcp_server
);
658 sd_dhcp_client_unref(link
->dhcp_client
);
659 sd_dhcp_lease_unref(link
->dhcp_lease
);
661 link_lldp_emit_stop(link
);
663 free(link
->lease_file
);
665 sd_lldp_unref(link
->lldp
);
666 free(link
->lldp_file
);
670 sd_ipv4ll_unref(link
->ipv4ll
);
671 sd_dhcp6_client_unref(link
->dhcp6_client
);
672 sd_ndisc_unref(link
->ndisc
);
673 sd_radv_unref(link
->radv
);
678 (void) unlink(link
->state_file
);
679 free(link
->state_file
);
681 sd_device_unref(link
->sd_device
);
683 HASHMAP_FOREACH (carrier
, link
->bound_to_links
, i
)
684 hashmap_remove(link
->bound_to_links
, INT_TO_PTR(carrier
->ifindex
));
685 hashmap_free(link
->bound_to_links
);
687 HASHMAP_FOREACH (carrier
, link
->bound_by_links
, i
)
688 hashmap_remove(link
->bound_by_links
, INT_TO_PTR(carrier
->ifindex
));
689 hashmap_free(link
->bound_by_links
);
691 set_free_with_destructor(link
->slaves
, link_unref
);
696 DEFINE_TRIVIAL_REF_UNREF_FUNC(Link
, link
, link_free
);
698 int link_get(Manager
*m
, int ifindex
, Link
**ret
) {
705 link
= hashmap_get(m
->links
, INT_TO_PTR(ifindex
));
714 static void link_set_state(Link
*link
, LinkState state
) {
717 if (link
->state
== state
)
720 log_link_debug(link
, "State changed: %s -> %s",
721 link_state_to_string(link
->state
),
722 link_state_to_string(state
));
726 link_send_changed(link
, "AdministrativeState", NULL
);
729 static void link_enter_unmanaged(Link
*link
) {
732 log_link_debug(link
, "Unmanaged");
734 link_set_state(link
, LINK_STATE_UNMANAGED
);
739 int link_stop_clients(Link
*link
) {
743 assert(link
->manager
);
744 assert(link
->manager
->event
);
746 if (link
->dhcp_client
) {
747 k
= sd_dhcp_client_stop(link
->dhcp_client
);
749 r
= log_link_warning_errno(link
, k
, "Could not stop DHCPv4 client: %m");
753 k
= sd_ipv4ll_stop(link
->ipv4ll
);
755 r
= log_link_warning_errno(link
, k
, "Could not stop IPv4 link-local: %m");
758 if (link
->dhcp6_client
) {
759 k
= sd_dhcp6_client_stop(link
->dhcp6_client
);
761 r
= log_link_warning_errno(link
, k
, "Could not stop DHCPv6 client: %m");
765 k
= sd_ndisc_stop(link
->ndisc
);
767 r
= log_link_warning_errno(link
, k
, "Could not stop IPv6 Router Discovery: %m");
771 k
= sd_radv_stop(link
->radv
);
773 r
= log_link_warning_errno(link
, k
, "Could not stop IPv6 Router Advertisement: %m");
776 link_lldp_emit_stop(link
);
780 void link_enter_failed(Link
*link
) {
783 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
786 log_link_warning(link
, "Failed");
788 link_set_state(link
, LINK_STATE_FAILED
);
790 link_stop_clients(link
);
795 static Address
* link_find_dhcp_server_address(Link
*link
) {
799 assert(link
->network
);
801 /* The first statically configured address if there is any */
802 LIST_FOREACH(addresses
, address
, link
->network
->static_addresses
) {
804 if (address
->family
!= AF_INET
)
807 if (in_addr_is_null(address
->family
, &address
->in_addr
))
813 /* If that didn't work, find a suitable address we got from the pool */
814 LIST_FOREACH(addresses
, address
, link
->pool_addresses
) {
815 if (address
->family
!= AF_INET
)
824 static int link_join_netdevs_after_configured(Link
*link
) {
829 HASHMAP_FOREACH(netdev
, link
->network
->stacked_netdevs
, i
) {
830 if (netdev
->ifindex
> 0)
831 /* Assume already enslaved. */
834 if (netdev_get_create_type(netdev
) != NETDEV_CREATE_AFTER_CONFIGURED
)
837 log_struct(LOG_DEBUG
,
838 LOG_LINK_INTERFACE(link
),
839 LOG_NETDEV_INTERFACE(netdev
),
840 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", netdev
->ifname
));
842 r
= netdev_join(netdev
, link
, NULL
);
844 return log_struct_errno(LOG_WARNING
, r
,
845 LOG_LINK_INTERFACE(link
),
846 LOG_NETDEV_INTERFACE(netdev
),
847 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", netdev
->ifname
));
853 static void link_enter_configured(Link
*link
) {
855 assert(link
->network
);
857 if (link
->state
!= LINK_STATE_CONFIGURING
)
860 log_link_info(link
, "Configured");
862 link_set_state(link
, LINK_STATE_CONFIGURED
);
864 (void) link_join_netdevs_after_configured(link
);
869 static int link_request_set_routing_policy_rule(Link
*link
) {
870 RoutingPolicyRule
*rule
, *rrule
= NULL
;
874 assert(link
->network
);
876 link_set_state(link
, LINK_STATE_CONFIGURING
);
877 link
->routing_policy_rules_configured
= false;
879 LIST_FOREACH(rules
, rule
, link
->network
->rules
) {
880 r
= routing_policy_rule_get(link
->manager
, rule
->family
, &rule
->from
, rule
->from_prefixlen
, &rule
->to
,
881 rule
->to_prefixlen
, rule
->tos
, rule
->fwmark
, rule
->table
, rule
->iif
, rule
->oif
,
882 rule
->protocol
, &rule
->sport
, &rule
->dport
, &rrule
);
884 (void) routing_policy_rule_make_local(link
->manager
, rrule
);
888 r
= routing_policy_rule_configure(rule
, link
, NULL
, false);
890 log_link_warning_errno(link
, r
, "Could not set routing policy rules: %m");
891 link_enter_failed(link
);
895 link
->routing_policy_rule_messages
++;
898 routing_policy_rule_purge(link
->manager
, link
);
899 if (link
->routing_policy_rule_messages
== 0) {
900 link
->routing_policy_rules_configured
= true;
901 link_check_ready(link
);
903 log_link_debug(link
, "Setting routing policy rules");
908 static int route_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
912 assert(link
->route_messages
> 0);
913 assert(IN_SET(link
->state
, LINK_STATE_CONFIGURING
,
914 LINK_STATE_FAILED
, LINK_STATE_LINGER
));
916 link
->route_messages
--;
918 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
921 r
= sd_netlink_message_get_errno(m
);
922 if (r
< 0 && r
!= -EEXIST
)
923 log_link_warning_errno(link
, r
, "Could not set route: %m");
925 if (link
->route_messages
== 0) {
926 log_link_debug(link
, "Routes set");
927 link
->static_routes_configured
= true;
928 link_check_ready(link
);
934 int link_request_set_routes(Link
*link
) {
936 PHASE_NON_GATEWAY
, /* First phase: Routes without a gateway */
937 PHASE_GATEWAY
, /* Second phase: Routes with a gateway */
944 assert(link
->network
);
945 assert(link
->addresses_configured
);
946 assert(link
->address_messages
== 0);
947 assert(link
->state
!= _LINK_STATE_INVALID
);
949 link_set_state(link
, LINK_STATE_CONFIGURING
);
950 link
->static_routes_configured
= false;
952 r
= link_request_set_routing_policy_rule(link
);
956 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
957 for (phase
= 0; phase
< _PHASE_MAX
; phase
++)
958 LIST_FOREACH(routes
, rt
, link
->network
->static_routes
) {
960 if (in_addr_is_null(rt
->family
, &rt
->gw
) != (phase
== PHASE_NON_GATEWAY
))
963 r
= route_configure(rt
, link
, route_handler
);
965 log_link_warning_errno(link
, r
, "Could not set routes: %m");
966 link_enter_failed(link
);
970 link
->route_messages
++;
973 if (link
->route_messages
== 0) {
974 link
->static_routes_configured
= true;
975 link_check_ready(link
);
977 log_link_debug(link
, "Setting routes");
982 void link_check_ready(Link
*link
) {
988 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
994 if (!link
->addresses_configured
)
997 if (!link
->neighbors_configured
)
1000 SET_FOREACH(a
, link
->addresses
, i
)
1001 if (!address_is_ready(a
))
1004 if (!link
->addresses_ready
) {
1005 link
->addresses_ready
= true;
1006 link_request_set_routes(link
);
1009 if (!link
->static_routes_configured
)
1012 if (!link
->routing_policy_rules_configured
)
1015 if (link_ipv4ll_enabled(link
) && !(link
->ipv4ll_address
&& link
->ipv4ll_route
))
1018 if (link_ipv6ll_enabled(link
) &&
1019 in_addr_is_null(AF_INET6
, (const union in_addr_union
*) &link
->ipv6ll_address
))
1022 if ((link_dhcp4_enabled(link
) || link_dhcp6_enabled(link
)) &&
1023 !(link
->dhcp4_configured
|| link
->dhcp6_configured
) &&
1024 !(link_ipv4ll_fallback_enabled(link
) && link
->ipv4ll_address
&& link
->ipv4ll_route
))
1025 /* When DHCP is enabled, at least one protocol must provide an address, or
1026 * an IPv4ll fallback address must be configured. */
1029 if (link_ipv6_accept_ra_enabled(link
) && !link
->ndisc_configured
)
1032 if (link
->state
!= LINK_STATE_CONFIGURED
)
1033 link_enter_configured(link
);
1038 static int link_request_set_neighbors(Link
*link
) {
1043 assert(link
->network
);
1044 assert(link
->state
!= _LINK_STATE_INVALID
);
1046 link_set_state(link
, LINK_STATE_CONFIGURING
);
1047 link
->neighbors_configured
= false;
1049 LIST_FOREACH(neighbors
, neighbor
, link
->network
->neighbors
) {
1050 r
= neighbor_configure(neighbor
, link
, NULL
);
1052 log_link_warning_errno(link
, r
, "Could not set neighbor: %m");
1053 link_enter_failed(link
);
1058 if (link
->neighbor_messages
== 0) {
1059 link
->neighbors_configured
= true;
1060 link_check_ready(link
);
1062 log_link_debug(link
, "Setting neighbors");
1067 static int address_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1073 assert(link
->ifname
);
1074 assert(link
->address_messages
> 0);
1075 assert(IN_SET(link
->state
, LINK_STATE_CONFIGURING
,
1076 LINK_STATE_FAILED
, LINK_STATE_LINGER
));
1078 link
->address_messages
--;
1080 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1083 r
= sd_netlink_message_get_errno(m
);
1084 if (r
< 0 && r
!= -EEXIST
)
1085 log_link_warning_errno(link
, r
, "could not set address: %m");
1087 manager_rtnl_process_address(rtnl
, m
, link
->manager
);
1089 if (link
->address_messages
== 0) {
1090 log_link_debug(link
, "Addresses set");
1091 link
->addresses_configured
= true;
1092 link_check_ready(link
);
1098 static int link_push_uplink_dns_to_dhcp_server(Link
*link
, sd_dhcp_server
*s
) {
1099 _cleanup_free_
struct in_addr
*addresses
= NULL
;
1100 size_t n_addresses
= 0, n_allocated
= 0;
1103 log_debug("Copying DNS server information from %s", link
->ifname
);
1108 for (i
= 0; i
< link
->network
->n_dns
; i
++) {
1111 /* Only look for IPv4 addresses */
1112 if (link
->network
->dns
[i
].family
!= AF_INET
)
1115 ia
= link
->network
->dns
[i
].address
.in
;
1117 /* Never propagate obviously borked data */
1118 if (in4_addr_is_null(&ia
) || in4_addr_is_localhost(&ia
))
1121 if (!GREEDY_REALLOC(addresses
, n_allocated
, n_addresses
+ 1))
1124 addresses
[n_addresses
++] = ia
;
1127 if (link
->network
->dhcp_use_dns
&& link
->dhcp_lease
) {
1128 const struct in_addr
*da
= NULL
;
1131 n
= sd_dhcp_lease_get_dns(link
->dhcp_lease
, &da
);
1134 if (!GREEDY_REALLOC(addresses
, n_allocated
, n_addresses
+ n
))
1137 for (j
= 0; j
< n
; j
++)
1138 if (in4_addr_is_non_local(&da
[j
]))
1139 addresses
[n_addresses
++] = da
[j
];
1143 if (n_addresses
<= 0)
1146 return sd_dhcp_server_set_dns(s
, addresses
, n_addresses
);
1149 static int link_push_uplink_ntp_to_dhcp_server(Link
*link
, sd_dhcp_server
*s
) {
1150 _cleanup_free_
struct in_addr
*addresses
= NULL
;
1151 size_t n_addresses
= 0, n_allocated
= 0;
1157 log_debug("Copying NTP server information from %s", link
->ifname
);
1159 STRV_FOREACH(a
, link
->network
->ntp
) {
1162 /* Only look for IPv4 addresses */
1163 if (inet_pton(AF_INET
, *a
, &ia
) <= 0)
1166 /* Never propagate obviously borked data */
1167 if (in4_addr_is_null(&ia
) || in4_addr_is_localhost(&ia
))
1170 if (!GREEDY_REALLOC(addresses
, n_allocated
, n_addresses
+ 1))
1173 addresses
[n_addresses
++] = ia
;
1176 if (link
->network
->dhcp_use_ntp
&& link
->dhcp_lease
) {
1177 const struct in_addr
*da
= NULL
;
1180 n
= sd_dhcp_lease_get_ntp(link
->dhcp_lease
, &da
);
1183 if (!GREEDY_REALLOC(addresses
, n_allocated
, n_addresses
+ n
))
1186 for (j
= 0; j
< n
; j
++)
1187 if (in4_addr_is_non_local(&da
[j
]))
1188 addresses
[n_addresses
++] = da
[j
];
1192 if (n_addresses
<= 0)
1195 return sd_dhcp_server_set_ntp(s
, addresses
, n_addresses
);
1198 static int link_set_bridge_fdb(Link
*link
) {
1199 FdbEntry
*fdb_entry
;
1202 LIST_FOREACH(static_fdb_entries
, fdb_entry
, link
->network
->static_fdb_entries
) {
1203 r
= fdb_entry_configure(link
, fdb_entry
);
1205 return log_link_error_errno(link
, r
, "Failed to add MAC entry to static MAC table: %m");
1211 static int link_request_set_addresses(Link
*link
) {
1212 AddressLabel
*label
;
1217 assert(link
->network
);
1218 assert(link
->state
!= _LINK_STATE_INVALID
);
1220 link_set_state(link
, LINK_STATE_CONFIGURING
);
1222 /* Reset all *_configured flags we are configuring. */
1223 link
->addresses_configured
= false;
1224 link
->addresses_ready
= false;
1225 link
->neighbors_configured
= false;
1226 link
->static_routes_configured
= false;
1227 link
->routing_policy_rules_configured
= false;
1229 r
= link_set_bridge_fdb(link
);
1233 r
= link_request_set_neighbors(link
);
1237 LIST_FOREACH(addresses
, ad
, link
->network
->static_addresses
) {
1240 update
= address_get(link
, ad
->family
, &ad
->in_addr
, ad
->prefixlen
, NULL
) > 0;
1242 r
= address_configure(ad
, link
, address_handler
, update
);
1244 log_link_warning_errno(link
, r
, "Could not set addresses: %m");
1245 link_enter_failed(link
);
1249 link
->address_messages
++;
1252 LIST_FOREACH(labels
, label
, link
->network
->address_labels
) {
1253 r
= address_label_configure(label
, link
, NULL
, false);
1255 log_link_warning_errno(link
, r
, "Could not set address label: %m");
1256 link_enter_failed(link
);
1260 link
->address_label_messages
++;
1263 /* now that we can figure out a default address for the dhcp server,
1265 if (link_dhcp4_server_enabled(link
) && (link
->flags
& IFF_UP
)) {
1267 Link
*uplink
= NULL
;
1268 bool acquired_uplink
= false;
1270 address
= link_find_dhcp_server_address(link
);
1272 log_link_warning(link
, "Failed to find suitable address for DHCPv4 server instance.");
1273 link_enter_failed(link
);
1277 /* use the server address' subnet as the pool */
1278 r
= sd_dhcp_server_configure_pool(link
->dhcp_server
, &address
->in_addr
.in
, address
->prefixlen
,
1279 link
->network
->dhcp_server_pool_offset
, link
->network
->dhcp_server_pool_size
);
1284 r = sd_dhcp_server_set_router(link->dhcp_server,
1285 &main_address->in_addr.in);
1290 if (link
->network
->dhcp_server_max_lease_time_usec
> 0) {
1291 r
= sd_dhcp_server_set_max_lease_time(
1293 DIV_ROUND_UP(link
->network
->dhcp_server_max_lease_time_usec
, USEC_PER_SEC
));
1298 if (link
->network
->dhcp_server_default_lease_time_usec
> 0) {
1299 r
= sd_dhcp_server_set_default_lease_time(
1301 DIV_ROUND_UP(link
->network
->dhcp_server_default_lease_time_usec
, USEC_PER_SEC
));
1306 if (link
->network
->dhcp_server_emit_dns
) {
1308 if (link
->network
->n_dhcp_server_dns
> 0)
1309 r
= sd_dhcp_server_set_dns(link
->dhcp_server
, link
->network
->dhcp_server_dns
, link
->network
->n_dhcp_server_dns
);
1311 uplink
= manager_find_uplink(link
->manager
, link
);
1312 acquired_uplink
= true;
1315 log_link_debug(link
, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1318 r
= link_push_uplink_dns_to_dhcp_server(uplink
, link
->dhcp_server
);
1321 log_link_warning_errno(link
, r
, "Failed to set DNS server for DHCP server, ignoring: %m");
1324 if (link
->network
->dhcp_server_emit_ntp
) {
1326 if (link
->network
->n_dhcp_server_ntp
> 0)
1327 r
= sd_dhcp_server_set_ntp(link
->dhcp_server
, link
->network
->dhcp_server_ntp
, link
->network
->n_dhcp_server_ntp
);
1329 if (!acquired_uplink
)
1330 uplink
= manager_find_uplink(link
->manager
, link
);
1333 log_link_debug(link
, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1336 r
= link_push_uplink_ntp_to_dhcp_server(uplink
, link
->dhcp_server
);
1340 log_link_warning_errno(link
, r
, "Failed to set NTP server for DHCP server, ignoring: %m");
1343 r
= sd_dhcp_server_set_emit_router(link
->dhcp_server
, link
->network
->dhcp_server_emit_router
);
1345 return log_link_warning_errno(link
, r
, "Failed to set router emission for DHCP server: %m");
1347 if (link
->network
->dhcp_server_emit_timezone
) {
1348 _cleanup_free_
char *buffer
= NULL
;
1349 const char *tz
= NULL
;
1351 if (link
->network
->dhcp_server_timezone
)
1352 tz
= link
->network
->dhcp_server_timezone
;
1354 r
= get_timezone(&buffer
);
1356 log_warning_errno(r
, "Failed to determine timezone: %m");
1362 r
= sd_dhcp_server_set_timezone(link
->dhcp_server
, tz
);
1367 if (!sd_dhcp_server_is_running(link
->dhcp_server
)) {
1368 r
= sd_dhcp_server_start(link
->dhcp_server
);
1370 log_link_warning_errno(link
, r
, "Could not start DHCPv4 server instance: %m");
1372 link_enter_failed(link
);
1378 log_link_debug(link
, "Offering DHCPv4 leases");
1381 if (link
->address_messages
== 0) {
1382 link
->addresses_configured
= true;
1383 link_check_ready(link
);
1385 log_link_debug(link
, "Setting addresses");
1390 static int link_set_bridge_vlan(Link
*link
) {
1393 r
= br_vlan_configure(link
, link
->network
->pvid
, link
->network
->br_vid_bitmap
, link
->network
->br_untagged_bitmap
);
1395 log_link_error_errno(link
, r
, "Failed to assign VLANs to bridge port: %m");
1400 static int link_set_proxy_arp(Link
*link
) {
1403 if (!link_proxy_arp_enabled(link
))
1406 r
= sysctl_write_ip_property_boolean(AF_INET
, link
->ifname
, "proxy_arp", link
->network
->proxy_arp
> 0);
1408 log_link_warning_errno(link
, r
, "Cannot configure proxy ARP for interface: %m");
1413 static int link_set_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1418 log_link_debug(link
, "Set link");
1420 r
= sd_netlink_message_get_errno(m
);
1421 if (r
< 0 && r
!= -EEXIST
) {
1422 log_link_error_errno(link
, r
, "Could not join netdev: %m");
1423 link_enter_failed(link
);
1429 static int link_configure_after_setting_mtu(Link
*link
);
1431 static int set_mtu_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1436 assert(link
->ifname
);
1438 link
->setting_mtu
= false;
1440 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1443 r
= sd_netlink_message_get_errno(m
);
1445 log_link_warning_errno(link
, r
, "Could not set MTU: %m");
1449 log_link_debug(link
, "Setting MTU done.");
1451 if (link
->state
== LINK_STATE_INITIALIZED
)
1452 (void) link_configure_after_setting_mtu(link
);
1457 int link_set_mtu(Link
*link
, uint32_t mtu
, bool force
) {
1458 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1462 assert(link
->manager
);
1463 assert(link
->manager
->rtnl
);
1465 if (mtu
== 0 || link
->setting_mtu
)
1468 if (force
? link
->mtu
== mtu
: link
->mtu
>= mtu
)
1471 log_link_debug(link
, "Setting MTU: %" PRIu32
, mtu
);
1473 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1475 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1477 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
1478 * for this interface, then disable IPv6 else enable it. */
1479 (void) link_enable_ipv6(link
);
1481 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
1482 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1483 if (link_ipv6_enabled(link
) && mtu
< IPV6_MIN_MTU
) {
1485 log_link_warning(link
, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU
) ", as "
1486 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU
) " bytes: %m");
1491 r
= sd_netlink_message_append_u32(req
, IFLA_MTU
, mtu
);
1493 return log_link_error_errno(link
, r
, "Could not append MTU: %m");
1495 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, set_mtu_handler
,
1496 link_netlink_destroy_callback
, link
);
1498 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1501 link
->setting_mtu
= true;
1506 static int set_flags_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1511 assert(link
->ifname
);
1513 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1516 r
= sd_netlink_message_get_errno(m
);
1518 log_link_warning_errno(link
, r
, "Could not set link flags: %m");
1523 static int link_set_flags(Link
*link
) {
1524 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1525 unsigned ifi_change
= 0;
1526 unsigned ifi_flags
= 0;
1530 assert(link
->manager
);
1531 assert(link
->manager
->rtnl
);
1533 if (link
->flags
& IFF_LOOPBACK
)
1539 if (link
->network
->arp
< 0 && link
->network
->multicast
< 0 && link
->network
->allmulticast
< 0)
1542 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1544 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1546 if (link
->network
->arp
>= 0) {
1547 ifi_change
|= IFF_NOARP
;
1548 SET_FLAG(ifi_flags
, IFF_NOARP
, link
->network
->arp
== 0);
1551 if (link
->network
->multicast
>= 0) {
1552 ifi_change
|= IFF_MULTICAST
;
1553 SET_FLAG(ifi_flags
, IFF_MULTICAST
, link
->network
->multicast
);
1556 if (link
->network
->allmulticast
>= 0) {
1557 ifi_change
|= IFF_ALLMULTI
;
1558 SET_FLAG(ifi_flags
, IFF_ALLMULTI
, link
->network
->allmulticast
);
1561 r
= sd_rtnl_message_link_set_flags(req
, ifi_flags
, ifi_change
);
1563 return log_link_error_errno(link
, r
, "Could not set link flags: %m");
1565 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, set_flags_handler
,
1566 link_netlink_destroy_callback
, link
);
1568 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1575 static int link_set_bridge(Link
*link
) {
1576 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1580 assert(link
->network
);
1582 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1584 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1586 r
= sd_rtnl_message_link_set_family(req
, PF_BRIDGE
);
1588 return log_link_error_errno(link
, r
, "Could not set message family: %m");
1590 r
= sd_netlink_message_open_container(req
, IFLA_PROTINFO
);
1592 return log_link_error_errno(link
, r
, "Could not append IFLA_PROTINFO attribute: %m");
1594 if (link
->network
->use_bpdu
>= 0) {
1595 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_GUARD
, link
->network
->use_bpdu
);
1597 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1600 if (link
->network
->hairpin
>= 0) {
1601 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_MODE
, link
->network
->hairpin
);
1603 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_MODE attribute: %m");
1606 if (link
->network
->fast_leave
>= 0) {
1607 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_FAST_LEAVE
, link
->network
->fast_leave
);
1609 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1612 if (link
->network
->allow_port_to_be_root
>= 0) {
1613 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_PROTECT
, link
->network
->allow_port_to_be_root
);
1615 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
1619 if (link
->network
->unicast_flood
>= 0) {
1620 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_UNICAST_FLOOD
, link
->network
->unicast_flood
);
1622 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
1625 if (link
->network
->multicast_flood
>= 0) {
1626 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_MCAST_FLOOD
, link
->network
->multicast_flood
);
1628 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_MCAST_FLOOD attribute: %m");
1631 if (link
->network
->multicast_to_unicast
>= 0) {
1632 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_MCAST_TO_UCAST
, link
->network
->multicast_to_unicast
);
1634 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_MCAST_TO_UCAST attribute: %m");
1637 if (link
->network
->neighbor_suppression
>= 0) {
1638 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_NEIGH_SUPPRESS
, link
->network
->neighbor_suppression
);
1640 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_NEIGH_SUPPRESS attribute: %m");
1643 if (link
->network
->learning
>= 0) {
1644 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_LEARNING
, link
->network
->learning
);
1646 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_LEARNING attribute: %m");
1649 if (link
->network
->cost
!= 0) {
1650 r
= sd_netlink_message_append_u32(req
, IFLA_BRPORT_COST
, link
->network
->cost
);
1652 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_COST attribute: %m");
1655 if (link
->network
->priority
!= LINK_BRIDGE_PORT_PRIORITY_INVALID
) {
1656 r
= sd_netlink_message_append_u16(req
, IFLA_BRPORT_PRIORITY
, link
->network
->priority
);
1658 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1661 r
= sd_netlink_message_close_container(req
);
1663 return log_link_error_errno(link
, r
, "Could not append IFLA_LINKINFO attribute: %m");
1665 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, link_set_handler
,
1666 link_netlink_destroy_callback
, link
);
1668 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1675 static int link_set_bond_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1680 assert(link
->ifname
);
1682 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1685 r
= sd_netlink_message_get_errno(m
);
1687 log_link_warning_errno(link
, r
, "Could not set bonding interface: %m");
1694 static int link_set_bond(Link
*link
) {
1695 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1699 assert(link
->network
);
1701 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_NEWLINK
, link
->network
->bond
->ifindex
);
1703 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1705 r
= sd_netlink_message_set_flags(req
, NLM_F_REQUEST
| NLM_F_ACK
);
1707 return log_link_error_errno(link
, r
, "Could not set netlink flags: %m");
1709 r
= sd_netlink_message_open_container(req
, IFLA_LINKINFO
);
1711 return log_link_error_errno(link
, r
, "Could not append IFLA_PROTINFO attribute: %m");
1713 r
= sd_netlink_message_open_container_union(req
, IFLA_INFO_DATA
, "bond");
1715 return log_link_error_errno(link
, r
, "Could not append IFLA_INFO_DATA attribute: %m");
1717 if (link
->network
->active_slave
) {
1718 r
= sd_netlink_message_append_u32(req
, IFLA_BOND_ACTIVE_SLAVE
, link
->ifindex
);
1720 return log_link_error_errno(link
, r
, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1723 if (link
->network
->primary_slave
) {
1724 r
= sd_netlink_message_append_u32(req
, IFLA_BOND_PRIMARY
, link
->ifindex
);
1726 return log_link_error_errno(link
, r
, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1729 r
= sd_netlink_message_close_container(req
);
1731 return log_link_error_errno(link
, r
, "Could not append IFLA_LINKINFO attribute: %m");
1733 r
= sd_netlink_message_close_container(req
);
1735 return log_link_error_errno(link
, r
, "Could not append IFLA_INFO_DATA attribute: %m");
1737 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, link_set_bond_handler
,
1738 link_netlink_destroy_callback
, link
);
1740 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1747 static int link_lldp_save(Link
*link
) {
1748 _cleanup_free_
char *temp_path
= NULL
;
1749 _cleanup_fclose_
FILE *f
= NULL
;
1750 sd_lldp_neighbor
**l
= NULL
;
1754 assert(link
->lldp_file
);
1757 (void) unlink(link
->lldp_file
);
1761 r
= sd_lldp_get_neighbors(link
->lldp
, &l
);
1765 (void) unlink(link
->lldp_file
);
1771 r
= fopen_temporary(link
->lldp_file
, &f
, &temp_path
);
1775 fchmod(fileno(f
), 0644);
1777 for (i
= 0; i
< n
; i
++) {
1782 r
= sd_lldp_neighbor_get_raw(l
[i
], &p
, &sz
);
1787 (void) fwrite(&u
, 1, sizeof(u
), f
);
1788 (void) fwrite(p
, 1, sz
, f
);
1791 r
= fflush_and_check(f
);
1795 if (rename(temp_path
, link
->lldp_file
) < 0) {
1802 (void) unlink(link
->lldp_file
);
1804 (void) unlink(temp_path
);
1806 log_link_error_errno(link
, r
, "Failed to save LLDP data to %s: %m", link
->lldp_file
);
1810 for (i
= 0; i
< n
; i
++)
1811 sd_lldp_neighbor_unref(l
[i
]);
1818 static void lldp_handler(sd_lldp
*lldp
, sd_lldp_event event
, sd_lldp_neighbor
*n
, void *userdata
) {
1819 Link
*link
= userdata
;
1824 (void) link_lldp_save(link
);
1826 if (link_lldp_emit_enabled(link
) && event
== SD_LLDP_EVENT_ADDED
) {
1827 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1829 log_link_debug(link
, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1831 r
= link_lldp_emit_start(link
);
1833 log_link_warning_errno(link
, r
, "Failed to restart LLDP transmission: %m");
1837 static int link_acquire_ipv6_conf(Link
*link
) {
1842 if (link_ipv6_accept_ra_enabled(link
)) {
1843 assert(link
->ndisc
);
1845 log_link_debug(link
, "Discovering IPv6 routers");
1847 r
= sd_ndisc_start(link
->ndisc
);
1848 if (r
< 0 && r
!= -EBUSY
)
1849 return log_link_warning_errno(link
, r
, "Could not start IPv6 Router Discovery: %m");
1852 if (link_radv_enabled(link
)) {
1854 assert(in_addr_is_link_local(AF_INET6
, (const union in_addr_union
*)&link
->ipv6ll_address
) > 0);
1856 log_link_debug(link
, "Starting IPv6 Router Advertisements");
1858 r
= sd_radv_start(link
->radv
);
1859 if (r
< 0 && r
!= -EBUSY
)
1860 return log_link_warning_errno(link
, r
, "Could not start IPv6 Router Advertisement: %m");
1863 (void) dhcp6_request_prefix_delegation(link
);
1868 static int link_acquire_ipv4_conf(Link
*link
) {
1872 assert(link
->manager
);
1873 assert(link
->manager
->event
);
1875 if (link_ipv4ll_enabled(link
)) {
1876 assert(link
->ipv4ll
);
1878 log_link_debug(link
, "Acquiring IPv4 link-local address");
1880 r
= sd_ipv4ll_start(link
->ipv4ll
);
1882 return log_link_warning_errno(link
, r
, "Could not acquire IPv4 link-local address: %m");
1885 if (link_dhcp4_enabled(link
)) {
1886 assert(link
->dhcp_client
);
1888 log_link_debug(link
, "Acquiring DHCPv4 lease");
1890 r
= sd_dhcp_client_start(link
->dhcp_client
);
1892 return log_link_warning_errno(link
, r
, "Could not acquire DHCPv4 lease: %m");
1898 static int link_acquire_conf(Link
*link
) {
1903 r
= link_acquire_ipv4_conf(link
);
1907 if (!in_addr_is_null(AF_INET6
, (const union in_addr_union
*) &link
->ipv6ll_address
)) {
1908 r
= link_acquire_ipv6_conf(link
);
1913 if (link_lldp_emit_enabled(link
)) {
1914 r
= link_lldp_emit_start(link
);
1916 return log_link_warning_errno(link
, r
, "Failed to start LLDP transmission: %m");
1922 bool link_has_carrier(Link
*link
) {
1923 /* see Documentation/networking/operstates.txt in the kernel sources */
1925 if (link
->kernel_operstate
== IF_OPER_UP
)
1928 if (link
->kernel_operstate
== IF_OPER_UNKNOWN
)
1929 /* operstate may not be implemented, so fall back to flags */
1930 if ((link
->flags
& IFF_LOWER_UP
) && !(link
->flags
& IFF_DORMANT
))
1936 static int link_address_genmode_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1941 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1944 r
= sd_netlink_message_get_errno(m
);
1946 log_link_warning_errno(link
, r
, "Could not set address genmode for interface: %m");
1951 static int link_configure_addrgen_mode(Link
*link
) {
1952 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1953 uint8_t ipv6ll_mode
;
1957 assert(link
->network
);
1958 assert(link
->manager
);
1959 assert(link
->manager
->rtnl
);
1961 log_link_debug(link
, "Setting address genmode for link");
1963 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1965 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1967 r
= sd_netlink_message_open_container(req
, IFLA_AF_SPEC
);
1969 return log_link_error_errno(link
, r
, "Could not open IFLA_AF_SPEC container: %m");
1971 r
= sd_netlink_message_open_container(req
, AF_INET6
);
1973 return log_link_error_errno(link
, r
, "Could not open AF_INET6 container: %m");
1975 if (!link_ipv6ll_enabled(link
))
1976 ipv6ll_mode
= IN6_ADDR_GEN_MODE_NONE
;
1977 else if (sysctl_read_ip_property(AF_INET6
, link
->ifname
, "stable_secret", NULL
) < 0)
1978 /* The file may not exist. And event if it exists, when stable_secret is unset,
1979 * reading the file fails with EIO. */
1980 ipv6ll_mode
= IN6_ADDR_GEN_MODE_EUI64
;
1982 ipv6ll_mode
= IN6_ADDR_GEN_MODE_STABLE_PRIVACY
;
1984 r
= sd_netlink_message_append_u8(req
, IFLA_INET6_ADDR_GEN_MODE
, ipv6ll_mode
);
1986 return log_link_error_errno(link
, r
, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1988 r
= sd_netlink_message_close_container(req
);
1990 return log_link_error_errno(link
, r
, "Could not close AF_INET6 container: %m");
1992 r
= sd_netlink_message_close_container(req
);
1994 return log_link_error_errno(link
, r
, "Could not close IFLA_AF_SPEC container: %m");
1996 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, link_address_genmode_handler
,
1997 link_netlink_destroy_callback
, link
);
1999 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
2006 static int link_up_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
2011 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
2014 r
= sd_netlink_message_get_errno(m
);
2016 /* we warn but don't fail the link, as it may be brought up later */
2017 log_link_warning_errno(link
, r
, "Could not bring up interface: %m");
2022 static int link_up(Link
*link
) {
2023 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
2027 assert(link
->network
);
2028 assert(link
->manager
);
2029 assert(link
->manager
->rtnl
);
2031 log_link_debug(link
, "Bringing link up");
2033 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
2035 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
2037 /* set it free if not enslaved with networkd */
2038 if (!link
->network
->bridge
&& !link
->network
->bond
&& !link
->network
->vrf
) {
2039 r
= sd_netlink_message_append_u32(req
, IFLA_MASTER
, 0);
2041 return log_link_error_errno(link
, r
, "Could not append IFLA_MASTER attribute: %m");
2044 r
= sd_rtnl_message_link_set_flags(req
, IFF_UP
, IFF_UP
);
2046 return log_link_error_errno(link
, r
, "Could not set link flags: %m");
2048 if (link
->network
->mac
) {
2049 r
= sd_netlink_message_append_ether_addr(req
, IFLA_ADDRESS
, link
->network
->mac
);
2051 return log_link_error_errno(link
, r
, "Could not set MAC address: %m");
2054 if (link_ipv6_enabled(link
)) {
2055 r
= sd_netlink_message_open_container(req
, IFLA_AF_SPEC
);
2057 return log_link_error_errno(link
, r
, "Could not open IFLA_AF_SPEC container: %m");
2059 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
2060 r
= sd_netlink_message_open_container(req
, AF_INET6
);
2062 return log_link_error_errno(link
, r
, "Could not open AF_INET6 container: %m");
2064 if (!in_addr_is_null(AF_INET6
, &link
->network
->ipv6_token
)) {
2065 r
= sd_netlink_message_append_in6_addr(req
, IFLA_INET6_TOKEN
, &link
->network
->ipv6_token
.in6
);
2067 return log_link_error_errno(link
, r
, "Could not append IFLA_INET6_TOKEN: %m");
2070 r
= sd_netlink_message_close_container(req
);
2072 return log_link_error_errno(link
, r
, "Could not close AF_INET6 container: %m");
2074 r
= sd_netlink_message_close_container(req
);
2076 return log_link_error_errno(link
, r
, "Could not close IFLA_AF_SPEC container: %m");
2079 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, link_up_handler
,
2080 link_netlink_destroy_callback
, link
);
2082 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
2089 static int link_up_can(Link
*link
) {
2090 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
2095 log_link_debug(link
, "Bringing CAN link up");
2097 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
2099 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
2101 r
= sd_rtnl_message_link_set_flags(req
, IFF_UP
, IFF_UP
);
2103 return log_link_error_errno(link
, r
, "Could not set link flags: %m");
2105 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, link_up_handler
,
2106 link_netlink_destroy_callback
, link
);
2108 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
2115 static int link_set_can(Link
*link
) {
2116 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*m
= NULL
;
2120 assert(link
->network
);
2121 assert(link
->manager
);
2122 assert(link
->manager
->rtnl
);
2124 log_link_debug(link
, "link_set_can");
2126 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &m
, RTM_NEWLINK
, link
->ifindex
);
2128 return log_link_error_errno(link
, r
, "Failed to allocate netlink message: %m");
2130 r
= sd_netlink_message_set_flags(m
, NLM_F_REQUEST
| NLM_F_ACK
);
2132 return log_link_error_errno(link
, r
, "Could not set netlink flags: %m");
2134 r
= sd_netlink_message_open_container(m
, IFLA_LINKINFO
);
2136 return log_link_error_errno(link
, r
, "Failed to open netlink container: %m");
2138 r
= sd_netlink_message_open_container_union(m
, IFLA_INFO_DATA
, link
->kind
);
2140 return log_link_error_errno(link
, r
, "Could not append IFLA_INFO_DATA attribute: %m");
2142 if (link
->network
->can_bitrate
> 0 || link
->network
->can_sample_point
> 0) {
2143 struct can_bittiming bt
= {
2144 .bitrate
= link
->network
->can_bitrate
,
2145 .sample_point
= link
->network
->can_sample_point
,
2148 if (link
->network
->can_bitrate
> UINT32_MAX
) {
2149 log_link_error(link
, "bitrate (%zu) too big.", link
->network
->can_bitrate
);
2153 log_link_debug(link
, "Setting bitrate = %d bit/s", bt
.bitrate
);
2154 if (link
->network
->can_sample_point
> 0)
2155 log_link_debug(link
, "Setting sample point = %d.%d%%", bt
.sample_point
/ 10, bt
.sample_point
% 10);
2157 log_link_debug(link
, "Using default sample point");
2159 r
= sd_netlink_message_append_data(m
, IFLA_CAN_BITTIMING
, &bt
, sizeof(bt
));
2161 return log_link_error_errno(link
, r
, "Could not append IFLA_CAN_BITTIMING attribute: %m");
2164 if (link
->network
->can_restart_us
> 0) {
2165 char time_string
[FORMAT_TIMESPAN_MAX
];
2166 uint64_t restart_ms
;
2168 if (link
->network
->can_restart_us
== USEC_INFINITY
)
2171 restart_ms
= DIV_ROUND_UP(link
->network
->can_restart_us
, USEC_PER_MSEC
);
2173 format_timespan(time_string
, FORMAT_TIMESPAN_MAX
, restart_ms
* 1000, MSEC_PER_SEC
);
2175 if (restart_ms
> UINT32_MAX
) {
2176 log_link_error(link
, "restart timeout (%s) too big.", time_string
);
2180 log_link_debug(link
, "Setting restart = %s", time_string
);
2182 r
= sd_netlink_message_append_u32(m
, IFLA_CAN_RESTART_MS
, restart_ms
);
2184 return log_link_error_errno(link
, r
, "Could not append IFLA_CAN_RESTART_MS attribute: %m");
2187 if (link
->network
->can_triple_sampling
>= 0) {
2188 struct can_ctrlmode cm
= {
2189 .mask
= CAN_CTRLMODE_3_SAMPLES
,
2190 .flags
= link
->network
->can_triple_sampling
? CAN_CTRLMODE_3_SAMPLES
: 0,
2193 log_link_debug(link
, "%sabling triple-sampling", link
->network
->can_triple_sampling
? "En" : "Dis");
2195 r
= sd_netlink_message_append_data(m
, IFLA_CAN_CTRLMODE
, &cm
, sizeof(cm
));
2197 return log_link_error_errno(link
, r
, "Could not append IFLA_CAN_CTRLMODE attribute: %m");
2200 r
= sd_netlink_message_close_container(m
);
2202 return log_link_error_errno(link
, r
, "Failed to close netlink container: %m");
2204 r
= sd_netlink_message_close_container(m
);
2206 return log_link_error_errno(link
, r
, "Failed to close netlink container: %m");
2208 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, m
, link_set_handler
,
2209 link_netlink_destroy_callback
, link
);
2211 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
2215 if (!(link
->flags
& IFF_UP
)) {
2216 r
= link_up_can(link
);
2218 link_enter_failed(link
);
2223 log_link_debug(link
, "link_set_can done");
2228 static int link_down_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
2233 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
2236 r
= sd_netlink_message_get_errno(m
);
2238 log_link_warning_errno(link
, r
, "Could not bring down interface: %m");
2240 if (streq_ptr(link
->kind
, "can"))
2246 int link_down(Link
*link
) {
2247 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
2251 assert(link
->manager
);
2252 assert(link
->manager
->rtnl
);
2254 log_link_debug(link
, "Bringing link down");
2256 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
,
2257 RTM_SETLINK
, link
->ifindex
);
2259 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
2261 r
= sd_rtnl_message_link_set_flags(req
, 0, IFF_UP
);
2263 return log_link_error_errno(link
, r
, "Could not set link flags: %m");
2265 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, link_down_handler
,
2266 link_netlink_destroy_callback
, link
);
2268 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
2275 static int link_handle_bound_to_list(Link
*link
) {
2279 bool required_up
= false;
2280 bool link_is_up
= false;
2284 if (hashmap_isempty(link
->bound_to_links
))
2287 if (link
->flags
& IFF_UP
)
2290 HASHMAP_FOREACH (l
, link
->bound_to_links
, i
)
2291 if (link_has_carrier(l
)) {
2296 if (!required_up
&& link_is_up
) {
2297 r
= link_down(link
);
2300 } else if (required_up
&& !link_is_up
) {
2309 static int link_handle_bound_by_list(Link
*link
) {
2316 if (hashmap_isempty(link
->bound_by_links
))
2319 HASHMAP_FOREACH (l
, link
->bound_by_links
, i
) {
2320 r
= link_handle_bound_to_list(l
);
2328 static int link_put_carrier(Link
*link
, Link
*carrier
, Hashmap
**h
) {
2334 if (link
== carrier
)
2337 if (hashmap_get(*h
, INT_TO_PTR(carrier
->ifindex
)))
2340 r
= hashmap_ensure_allocated(h
, NULL
);
2344 r
= hashmap_put(*h
, INT_TO_PTR(carrier
->ifindex
), carrier
);
2351 static int link_new_bound_by_list(Link
*link
) {
2356 bool list_updated
= false;
2359 assert(link
->manager
);
2363 HASHMAP_FOREACH(carrier
, m
->links
, i
) {
2364 if (!carrier
->network
)
2367 if (strv_isempty(carrier
->network
->bind_carrier
))
2370 if (strv_fnmatch(carrier
->network
->bind_carrier
, link
->ifname
, 0)) {
2371 r
= link_put_carrier(link
, carrier
, &link
->bound_by_links
);
2375 list_updated
= true;
2382 HASHMAP_FOREACH(carrier
, link
->bound_by_links
, i
) {
2383 r
= link_put_carrier(carrier
, link
, &carrier
->bound_to_links
);
2387 link_dirty(carrier
);
2393 static int link_new_bound_to_list(Link
*link
) {
2398 bool list_updated
= false;
2401 assert(link
->manager
);
2406 if (strv_isempty(link
->network
->bind_carrier
))
2411 HASHMAP_FOREACH (carrier
, m
->links
, i
) {
2412 if (strv_fnmatch(link
->network
->bind_carrier
, carrier
->ifname
, 0)) {
2413 r
= link_put_carrier(link
, carrier
, &link
->bound_to_links
);
2417 list_updated
= true;
2424 HASHMAP_FOREACH (carrier
, link
->bound_to_links
, i
) {
2425 r
= link_put_carrier(carrier
, link
, &carrier
->bound_by_links
);
2429 link_dirty(carrier
);
2435 static int link_new_carrier_maps(Link
*link
) {
2438 r
= link_new_bound_by_list(link
);
2442 r
= link_handle_bound_by_list(link
);
2446 r
= link_new_bound_to_list(link
);
2450 r
= link_handle_bound_to_list(link
);
2457 static void link_free_bound_to_list(Link
*link
) {
2461 HASHMAP_FOREACH (bound_to
, link
->bound_to_links
, i
) {
2462 hashmap_remove(link
->bound_to_links
, INT_TO_PTR(bound_to
->ifindex
));
2464 if (hashmap_remove(bound_to
->bound_by_links
, INT_TO_PTR(link
->ifindex
)))
2465 link_dirty(bound_to
);
2471 static void link_free_bound_by_list(Link
*link
) {
2475 HASHMAP_FOREACH (bound_by
, link
->bound_by_links
, i
) {
2476 hashmap_remove(link
->bound_by_links
, INT_TO_PTR(bound_by
->ifindex
));
2478 if (hashmap_remove(bound_by
->bound_to_links
, INT_TO_PTR(link
->ifindex
))) {
2479 link_dirty(bound_by
);
2480 link_handle_bound_to_list(bound_by
);
2487 static void link_free_carrier_maps(Link
*link
) {
2488 bool list_updated
= false;
2492 if (!hashmap_isempty(link
->bound_to_links
)) {
2493 link_free_bound_to_list(link
);
2494 list_updated
= true;
2497 if (!hashmap_isempty(link
->bound_by_links
)) {
2498 link_free_bound_by_list(link
);
2499 list_updated
= true;
2508 static int link_append_to_master(Link
*link
, NetDev
*netdev
) {
2515 r
= link_get(link
->manager
, netdev
->ifindex
, &master
);
2519 r
= set_ensure_allocated(&master
->slaves
, NULL
);
2523 r
= set_put(master
->slaves
, link
);
2531 static void link_drop_from_master(Link
*link
, NetDev
*netdev
) {
2536 if (!link
->manager
|| !netdev
)
2539 if (link_get(link
->manager
, netdev
->ifindex
, &master
) < 0)
2542 link_unref(set_remove(master
->slaves
, link
));
2545 static void link_detach_from_manager(Link
*link
) {
2546 if (!link
|| !link
->manager
)
2549 link_unref(set_remove(link
->manager
->links_requesting_uuid
, link
));
2552 /* The following must be called at last. */
2553 assert_se(hashmap_remove(link
->manager
->links
, INT_TO_PTR(link
->ifindex
)) == link
);
2557 void link_drop(Link
*link
) {
2558 if (!link
|| link
->state
== LINK_STATE_LINGER
)
2561 link_set_state(link
, LINK_STATE_LINGER
);
2563 link_free_carrier_maps(link
);
2565 if (link
->network
) {
2566 link_drop_from_master(link
, link
->network
->bridge
);
2567 link_drop_from_master(link
, link
->network
->bond
);
2570 log_link_debug(link
, "Link removed");
2572 (void) unlink(link
->state_file
);
2573 link_detach_from_manager(link
);
2576 static int link_joined(Link
*link
) {
2580 assert(link
->network
);
2582 if (!hashmap_isempty(link
->bound_to_links
)) {
2583 r
= link_handle_bound_to_list(link
);
2586 } else if (!(link
->flags
& IFF_UP
)) {
2589 link_enter_failed(link
);
2594 if (link
->network
->bridge
) {
2595 r
= link_set_bridge(link
);
2597 log_link_error_errno(link
, r
, "Could not set bridge message: %m");
2599 r
= link_append_to_master(link
, link
->network
->bridge
);
2601 log_link_error_errno(link
, r
, "Failed to add to bridge master's slave list: %m");
2604 if (link
->network
->bond
) {
2605 r
= link_set_bond(link
);
2607 log_link_error_errno(link
, r
, "Could not set bond message: %m");
2609 r
= link_append_to_master(link
, link
->network
->bond
);
2611 log_link_error_errno(link
, r
, "Failed to add to bond master's slave list: %m");
2614 if (link
->network
->use_br_vlan
&&
2615 (link
->network
->bridge
|| streq_ptr("bridge", link
->kind
))) {
2616 r
= link_set_bridge_vlan(link
);
2618 log_link_error_errno(link
, r
, "Could not set bridge vlan: %m");
2621 /* Skip setting up addresses until it gets carrier,
2622 or it would try to set addresses twice,
2623 which is bad for non-idempotent steps. */
2624 if (!link_has_carrier(link
) && !link
->network
->configure_without_carrier
)
2627 return link_request_set_addresses(link
);
2630 static int netdev_join_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
2634 assert(link
->network
);
2635 assert(link
->enslaving
> 0);
2636 assert(!link
->enslaved_raw
);
2640 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
2643 r
= sd_netlink_message_get_errno(m
);
2644 if (r
< 0 && r
!= -EEXIST
) {
2645 log_link_error_errno(link
, r
, "Could not join netdev: %m");
2646 link_enter_failed(link
);
2649 log_link_debug(link
, "Joined netdev");
2651 if (link
->enslaving
== 0) {
2652 link
->enslaved_raw
= true;
2659 static int link_enter_join_netdev(Link
*link
) {
2665 assert(link
->network
);
2666 assert(link
->state
== LINK_STATE_INITIALIZED
);
2668 link_set_state(link
, LINK_STATE_CONFIGURING
);
2671 link
->enslaving
= 0;
2672 link
->enslaved_raw
= false;
2674 if (link
->network
->bond
) {
2675 if (link
->network
->bond
->state
== NETDEV_STATE_READY
&&
2676 link
->network
->bond
->ifindex
== link
->master_ifindex
)
2677 return link_joined(link
);
2679 log_struct(LOG_DEBUG
,
2680 LOG_LINK_INTERFACE(link
),
2681 LOG_NETDEV_INTERFACE(link
->network
->bond
),
2682 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", link
->network
->bond
->ifname
));
2686 r
= netdev_join(link
->network
->bond
, link
, netdev_join_handler
);
2688 log_struct_errno(LOG_WARNING
, r
,
2689 LOG_LINK_INTERFACE(link
),
2690 LOG_NETDEV_INTERFACE(link
->network
->bond
),
2691 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", link
->network
->bond
->ifname
));
2692 link_enter_failed(link
);
2697 if (link
->network
->bridge
) {
2698 log_struct(LOG_DEBUG
,
2699 LOG_LINK_INTERFACE(link
),
2700 LOG_NETDEV_INTERFACE(link
->network
->bridge
),
2701 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", link
->network
->bridge
->ifname
));
2705 r
= netdev_join(link
->network
->bridge
, link
, netdev_join_handler
);
2707 log_struct_errno(LOG_WARNING
, r
,
2708 LOG_LINK_INTERFACE(link
),
2709 LOG_NETDEV_INTERFACE(link
->network
->bridge
),
2710 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", link
->network
->bridge
->ifname
));
2711 link_enter_failed(link
);
2716 if (link
->network
->vrf
) {
2717 log_struct(LOG_DEBUG
,
2718 LOG_LINK_INTERFACE(link
),
2719 LOG_NETDEV_INTERFACE(link
->network
->vrf
),
2720 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", link
->network
->vrf
->ifname
));
2724 r
= netdev_join(link
->network
->vrf
, link
, netdev_join_handler
);
2726 log_struct_errno(LOG_WARNING
, r
,
2727 LOG_LINK_INTERFACE(link
),
2728 LOG_NETDEV_INTERFACE(link
->network
->vrf
),
2729 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", link
->network
->vrf
->ifname
));
2730 link_enter_failed(link
);
2735 HASHMAP_FOREACH(netdev
, link
->network
->stacked_netdevs
, i
) {
2737 if (netdev
->ifindex
> 0)
2738 /* Assume already enslaved. */
2741 if (netdev_get_create_type(netdev
) != NETDEV_CREATE_STACKED
)
2744 log_struct(LOG_DEBUG
,
2745 LOG_LINK_INTERFACE(link
),
2746 LOG_NETDEV_INTERFACE(netdev
),
2747 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", netdev
->ifname
));
2751 r
= netdev_join(netdev
, link
, netdev_join_handler
);
2753 log_struct_errno(LOG_WARNING
, r
,
2754 LOG_LINK_INTERFACE(link
),
2755 LOG_NETDEV_INTERFACE(netdev
),
2756 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", netdev
->ifname
));
2757 link_enter_failed(link
);
2762 if (link
->enslaving
== 0)
2763 return link_joined(link
);
2768 static int link_set_ipv4_forward(Link
*link
) {
2771 if (!link_ipv4_forward_enabled(link
))
2774 /* We propagate the forwarding flag from one interface to the
2775 * global setting one way. This means: as long as at least one
2776 * interface was configured at any time that had IP forwarding
2777 * enabled the setting will stay on for good. We do this
2778 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2779 * somewhat in sync (see below). */
2781 r
= sysctl_write_ip_property(AF_INET
, NULL
, "ip_forward", "1");
2783 log_link_warning_errno(link
, r
, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
2788 static int link_set_ipv6_forward(Link
*link
) {
2791 if (!link_ipv6_forward_enabled(link
))
2794 /* On Linux, the IPv6 stack does not know a per-interface
2795 * packet forwarding setting: either packet forwarding is on
2796 * for all, or off for all. We hence don't bother with a
2797 * per-interface setting, but simply propagate the interface
2798 * flag, if it is set, to the global flag, one-way. Note that
2799 * while IPv4 would allow a per-interface flag, we expose the
2800 * same behaviour there and also propagate the setting from
2801 * one to all, to keep things simple (see above). */
2803 r
= sysctl_write_ip_property(AF_INET6
, "all", "forwarding", "1");
2805 log_link_warning_errno(link
, r
, "Cannot configure IPv6 packet forwarding, ignoring: %m");
2810 static int link_set_ipv6_privacy_extensions(Link
*link
) {
2811 IPv6PrivacyExtensions s
;
2814 s
= link_ipv6_privacy_extensions(link
);
2818 r
= sysctl_write_ip_property_int(AF_INET6
, link
->ifname
, "use_tempaddr", (int) link
->network
->ipv6_privacy_extensions
);
2820 log_link_warning_errno(link
, r
, "Cannot configure IPv6 privacy extension for interface: %m");
2825 static int link_set_ipv6_accept_ra(Link
*link
) {
2828 /* Make this a NOP if IPv6 is not available */
2829 if (!socket_ipv6_is_supported())
2832 if (link
->flags
& IFF_LOOPBACK
)
2838 r
= sysctl_write_ip_property(AF_INET6
, link
->ifname
, "accept_ra", "0");
2840 log_link_warning_errno(link
, r
, "Cannot disable kernel IPv6 accept_ra for interface: %m");
2845 static int link_set_ipv6_dad_transmits(Link
*link
) {
2848 /* Make this a NOP if IPv6 is not available */
2849 if (!socket_ipv6_is_supported())
2852 if (link
->flags
& IFF_LOOPBACK
)
2858 if (link
->network
->ipv6_dad_transmits
< 0)
2861 r
= sysctl_write_ip_property_int(AF_INET6
, link
->ifname
, "dad_transmits", link
->network
->ipv6_dad_transmits
);
2863 log_link_warning_errno(link
, r
, "Cannot set IPv6 dad transmits for interface: %m");
2868 static int link_set_ipv6_hop_limit(Link
*link
) {
2871 /* Make this a NOP if IPv6 is not available */
2872 if (!socket_ipv6_is_supported())
2875 if (link
->flags
& IFF_LOOPBACK
)
2881 if (link
->network
->ipv6_hop_limit
< 0)
2884 r
= sysctl_write_ip_property_int(AF_INET6
, link
->ifname
, "hop_limit", link
->network
->ipv6_hop_limit
);
2886 log_link_warning_errno(link
, r
, "Cannot set IPv6 hop limit for interface: %m");
2891 static int link_set_ipv6_mtu(Link
*link
) {
2894 /* Make this a NOP if IPv6 is not available */
2895 if (!socket_ipv6_is_supported())
2898 if (link
->flags
& IFF_LOOPBACK
)
2901 if (link
->network
->ipv6_mtu
== 0)
2904 r
= sysctl_write_ip_property_uint32(AF_INET6
, link
->ifname
, "mtu", link
->network
->ipv6_mtu
);
2906 log_link_warning_errno(link
, r
, "Cannot set IPv6 MTU for interface: %m");
2911 static bool link_is_static_address_configured(Link
*link
, Address
*address
) {
2912 Address
*net_address
;
2920 LIST_FOREACH(addresses
, net_address
, link
->network
->static_addresses
)
2921 if (address_equal(net_address
, address
))
2927 static bool link_is_static_route_configured(Link
*link
, Route
*route
) {
2936 LIST_FOREACH(routes
, net_route
, link
->network
->static_routes
)
2937 if (route_equal(net_route
, route
))
2943 static int link_drop_foreign_config(Link
*link
) {
2949 SET_FOREACH(address
, link
->addresses_foreign
, i
) {
2950 /* we consider IPv6LL addresses to be managed by the kernel */
2951 if (address
->family
== AF_INET6
&& in_addr_is_link_local(AF_INET6
, &address
->in_addr
) == 1)
2954 if (link_is_static_address_configured(link
, address
)) {
2955 r
= address_add(link
, address
->family
, &address
->in_addr
, address
->prefixlen
, NULL
);
2957 return log_link_error_errno(link
, r
, "Failed to add address: %m");
2959 r
= address_remove(address
, link
, NULL
);
2965 SET_FOREACH(route
, link
->routes_foreign
, i
) {
2966 /* do not touch routes managed by the kernel */
2967 if (route
->protocol
== RTPROT_KERNEL
)
2970 if (link_is_static_route_configured(link
, route
)) {
2971 r
= route_add(link
, route
->family
, &route
->dst
, route
->dst_prefixlen
, route
->tos
, route
->priority
, route
->table
, NULL
);
2975 r
= route_remove(route
, link
, NULL
);
2984 static int link_drop_config(Link
*link
) {
2985 Address
*address
, *pool_address
;
2990 SET_FOREACH(address
, link
->addresses
, i
) {
2991 /* we consider IPv6LL addresses to be managed by the kernel */
2992 if (address
->family
== AF_INET6
&& in_addr_is_link_local(AF_INET6
, &address
->in_addr
) == 1)
2995 r
= address_remove(address
, link
, NULL
);
2999 /* If this address came from an address pool, clean up the pool */
3000 LIST_FOREACH(addresses
, pool_address
, link
->pool_addresses
) {
3001 if (address_equal(address
, pool_address
)) {
3002 LIST_REMOVE(addresses
, link
->pool_addresses
, pool_address
);
3003 address_free(pool_address
);
3009 SET_FOREACH(route
, link
->routes
, i
) {
3010 /* do not touch routes managed by the kernel */
3011 if (route
->protocol
== RTPROT_KERNEL
)
3014 r
= route_remove(route
, link
, NULL
);
3024 static int link_update_lldp(Link
*link
) {
3032 if (link
->flags
& IFF_UP
) {
3033 r
= sd_lldp_start(link
->lldp
);
3035 log_link_debug(link
, "Started LLDP.");
3037 r
= sd_lldp_stop(link
->lldp
);
3039 log_link_debug(link
, "Stopped LLDP.");
3045 static int link_configure_can(Link
*link
) {
3048 if (streq_ptr(link
->kind
, "can")) {
3049 /* The CAN interface must be down to configure bitrate, etc... */
3050 if ((link
->flags
& IFF_UP
)) {
3051 r
= link_down(link
);
3053 link_enter_failed(link
);
3060 return link_set_can(link
);
3063 if (!(link
->flags
& IFF_UP
)) {
3064 r
= link_up_can(link
);
3066 link_enter_failed(link
);
3074 static int link_configure(Link
*link
) {
3078 assert(link
->network
);
3079 assert(link
->state
== LINK_STATE_INITIALIZED
);
3081 if (STRPTR_IN_SET(link
->kind
, "can", "vcan"))
3082 return link_configure_can(link
);
3084 /* Drop foreign config, but ignore loopback or critical devices.
3085 * We do not want to remove loopback address or addresses used for root NFS. */
3086 if (!(link
->flags
& IFF_LOOPBACK
) && !(link
->network
->dhcp_critical
)) {
3087 r
= link_drop_foreign_config(link
);
3092 r
= link_set_proxy_arp(link
);
3096 r
= ipv6_proxy_ndp_addresses_configure(link
);
3100 r
= link_set_ipv4_forward(link
);
3104 r
= link_set_ipv6_forward(link
);
3108 r
= link_set_ipv6_privacy_extensions(link
);
3112 r
= link_set_ipv6_accept_ra(link
);
3116 r
= link_set_ipv6_dad_transmits(link
);
3120 r
= link_set_ipv6_hop_limit(link
);
3124 r
= link_set_flags(link
);
3128 r
= link_set_ipv6_mtu(link
);
3132 if (link_ipv4ll_enabled(link
) || link_ipv4ll_fallback_enabled(link
)) {
3133 r
= ipv4ll_configure(link
);
3138 if (link_dhcp4_enabled(link
)) {
3139 r
= dhcp4_set_promote_secondaries(link
);
3143 r
= dhcp4_configure(link
);
3148 if (link_dhcp4_server_enabled(link
)) {
3149 r
= sd_dhcp_server_new(&link
->dhcp_server
, link
->ifindex
);
3153 r
= sd_dhcp_server_attach_event(link
->dhcp_server
, NULL
, 0);
3158 if (link_dhcp6_enabled(link
) ||
3159 link_ipv6_accept_ra_enabled(link
)) {
3160 r
= dhcp6_configure(link
);
3165 if (link_ipv6_accept_ra_enabled(link
)) {
3166 r
= ndisc_configure(link
);
3171 if (link_radv_enabled(link
)) {
3172 r
= radv_configure(link
);
3177 if (link_lldp_rx_enabled(link
)) {
3178 r
= sd_lldp_new(&link
->lldp
);
3182 r
= sd_lldp_set_ifindex(link
->lldp
, link
->ifindex
);
3186 r
= sd_lldp_match_capabilities(link
->lldp
,
3187 link
->network
->lldp_mode
== LLDP_MODE_ROUTERS_ONLY
?
3188 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS
:
3189 SD_LLDP_SYSTEM_CAPABILITIES_ALL
);
3193 r
= sd_lldp_set_filter_address(link
->lldp
, &link
->mac
);
3197 r
= sd_lldp_attach_event(link
->lldp
, NULL
, 0);
3201 r
= sd_lldp_set_callback(link
->lldp
, lldp_handler
, link
);
3205 r
= link_update_lldp(link
);
3210 r
= link_set_mtu(link
, link
->network
->mtu
, link
->network
->mtu_is_set
);
3214 if (socket_ipv6_is_supported()) {
3215 r
= link_configure_addrgen_mode(link
);
3220 return link_configure_after_setting_mtu(link
);
3223 static int link_configure_after_setting_mtu(Link
*link
) {
3227 assert(link
->network
);
3228 assert(link
->state
== LINK_STATE_INITIALIZED
);
3230 if (link
->setting_mtu
)
3233 if (link_has_carrier(link
) || link
->network
->configure_without_carrier
) {
3234 r
= link_acquire_conf(link
);
3239 return link_enter_join_netdev(link
);
3242 static int duid_set_uuid(DUID
*duid
, sd_id128_t uuid
) {
3245 if (duid
->raw_data_len
> 0)
3248 if (duid
->type
!= DUID_TYPE_UUID
)
3251 memcpy(&duid
->raw_data
, &uuid
, sizeof(sd_id128_t
));
3252 duid
->raw_data_len
= sizeof(sd_id128_t
);
3257 int get_product_uuid_handler(sd_bus_message
*m
, void *userdata
, sd_bus_error
*ret_error
) {
3258 Manager
*manager
= userdata
;
3259 const sd_bus_error
*e
;
3269 e
= sd_bus_message_get_error(m
);
3271 log_error_errno(sd_bus_error_get_errno(e
),
3272 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
3277 r
= sd_bus_message_read_array(m
, 'y', &a
, &sz
);
3281 if (sz
!= sizeof(sd_id128_t
)) {
3282 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
3286 memcpy(&manager
->product_uuid
, a
, sz
);
3287 while ((duid
= set_steal_first(manager
->duids_requesting_uuid
)))
3288 (void) duid_set_uuid(duid
, manager
->product_uuid
);
3290 manager
->duids_requesting_uuid
= set_free(manager
->duids_requesting_uuid
);
3293 while ((link
= set_steal_first(manager
->links_requesting_uuid
))) {
3294 r
= link_configure(link
);
3296 log_link_error_errno(link
, r
, "Failed to configure link: %m");
3299 manager
->links_requesting_uuid
= set_free(manager
->links_requesting_uuid
);
3301 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
3302 * even if the method fails. */
3303 manager
->has_product_uuid
= true;
3308 static bool link_requires_uuid(Link
*link
) {
3312 assert(link
->manager
);
3313 assert(link
->network
);
3315 duid
= link_get_duid(link
);
3316 if (duid
->type
!= DUID_TYPE_UUID
|| duid
->raw_data_len
!= 0)
3319 if (link_dhcp4_enabled(link
) && IN_SET(link
->network
->dhcp_client_identifier
, DHCP_CLIENT_ID_DUID
, DHCP_CLIENT_ID_DUID_ONLY
))
3322 if (link_dhcp6_enabled(link
) || link_ipv6_accept_ra_enabled(link
))
3328 static int link_configure_duid(Link
*link
) {
3334 assert(link
->manager
);
3335 assert(link
->network
);
3338 duid
= link_get_duid(link
);
3340 if (!link_requires_uuid(link
))
3343 if (m
->has_product_uuid
) {
3344 (void) duid_set_uuid(duid
, m
->product_uuid
);
3348 if (!m
->links_requesting_uuid
) {
3349 r
= manager_request_product_uuid(m
, link
);
3354 log_link_warning_errno(link
, r
,
3355 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
3359 r
= set_put(m
->links_requesting_uuid
, link
);
3363 r
= set_put(m
->duids_requesting_uuid
, duid
);
3371 static int link_initialized_and_synced(Link
*link
) {
3376 assert(link
->ifname
);
3377 assert(link
->manager
);
3379 /* We may get called either from the asynchronous netlink callback,
3380 * or directly for link_add() if running in a container. See link_add(). */
3381 if (!IN_SET(link
->state
, LINK_STATE_PENDING
, LINK_STATE_INITIALIZED
))
3384 log_link_debug(link
, "Link state is up-to-date");
3385 link_set_state(link
, LINK_STATE_INITIALIZED
);
3387 r
= link_new_bound_by_list(link
);
3391 r
= link_handle_bound_by_list(link
);
3395 if (!link
->network
) {
3396 r
= network_get(link
->manager
, link
->sd_device
, link
->ifname
,
3397 &link
->mac
, &network
);
3399 link_enter_unmanaged(link
);
3401 } else if (r
== 0 && network
->unmanaged
) {
3402 link_enter_unmanaged(link
);
3407 if (link
->flags
& IFF_LOOPBACK
) {
3408 if (network
->link_local
!= ADDRESS_FAMILY_NO
)
3409 log_link_debug(link
, "Ignoring link-local autoconfiguration for loopback link");
3411 if (network
->dhcp
!= ADDRESS_FAMILY_NO
)
3412 log_link_debug(link
, "Ignoring DHCP clients for loopback link");
3414 if (network
->dhcp_server
)
3415 log_link_debug(link
, "Ignoring DHCP server for loopback link");
3418 r
= network_apply(network
, link
);
3423 r
= link_new_bound_to_list(link
);
3427 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3428 * link_configure() is called later asynchronously. */
3429 r
= link_configure_duid(link
);
3433 r
= link_configure(link
);
3440 static int link_initialized_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
3441 (void) link_initialized_and_synced(link
);
3445 int link_initialized(Link
*link
, sd_device
*device
) {
3446 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
3450 assert(link
->manager
);
3451 assert(link
->manager
->rtnl
);
3454 if (link
->state
!= LINK_STATE_PENDING
)
3457 if (link
->sd_device
)
3460 log_link_debug(link
, "udev initialized link");
3461 link_set_state(link
, LINK_STATE_INITIALIZED
);
3463 link
->sd_device
= sd_device_ref(device
);
3465 /* udev has initialized the link, but we don't know if we have yet
3466 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3467 * when it returns we know that the pending NEWLINKs have already been
3468 * processed and that we are up-to-date */
3470 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_GETLINK
,
3475 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, link_initialized_handler
,
3476 link_netlink_destroy_callback
, link
);
3485 static int link_load(Link
*link
) {
3486 _cleanup_free_
char *network_file
= NULL
,
3489 *dhcp4_address
= NULL
,
3490 *ipv4ll_address
= NULL
;
3491 union in_addr_union address
;
3492 union in_addr_union route_dst
;
3498 r
= parse_env_file(NULL
, link
->state_file
,
3499 "NETWORK_FILE", &network_file
,
3500 "ADDRESSES", &addresses
,
3502 "DHCP4_ADDRESS", &dhcp4_address
,
3503 "IPV4LL_ADDRESS", &ipv4ll_address
);
3504 if (r
< 0 && r
!= -ENOENT
)
3505 return log_link_error_errno(link
, r
, "Failed to read %s: %m", link
->state_file
);
3512 suffix
= strrchr(network_file
, '.');
3514 log_link_debug(link
, "Failed to get network name from %s", network_file
);
3515 goto network_file_fail
;
3519 r
= network_get_by_name(link
->manager
, basename(network_file
), &network
);
3521 log_link_debug_errno(link
, r
, "Failed to get network %s: %m", basename(network_file
));
3522 goto network_file_fail
;
3525 r
= network_apply(network
, link
);
3527 return log_link_error_errno(link
, r
, "Failed to apply network %s: %m", basename(network_file
));
3536 _cleanup_free_
char *address_str
= NULL
;
3537 char *prefixlen_str
;
3539 unsigned char prefixlen
;
3541 r
= extract_first_word(&p
, &address_str
, NULL
, 0);
3543 log_link_debug_errno(link
, r
, "Failed to extract next address string: %m");
3549 prefixlen_str
= strchr(address_str
, '/');
3550 if (!prefixlen_str
) {
3551 log_link_debug(link
, "Failed to parse address and prefix length %s", address_str
);
3555 *prefixlen_str
++ = '\0';
3557 r
= sscanf(prefixlen_str
, "%hhu", &prefixlen
);
3559 log_link_error(link
, "Failed to parse prefixlen %s", prefixlen_str
);
3563 r
= in_addr_from_string_auto(address_str
, &family
, &address
);
3565 log_link_debug_errno(link
, r
, "Failed to parse address %s: %m", address_str
);
3569 r
= address_add(link
, family
, &address
, prefixlen
, NULL
);
3571 return log_link_error_errno(link
, r
, "Failed to add address: %m");
3580 _cleanup_free_
char *route_str
= NULL
;
3581 _cleanup_(sd_event_source_unrefp
) sd_event_source
*expire
= NULL
;
3583 char *prefixlen_str
;
3585 unsigned char prefixlen
, tos
, table
;
3588 r
= extract_first_word(&p
, &route_str
, NULL
, 0);
3590 log_link_debug_errno(link
, r
, "Failed to extract next route string: %m");
3596 prefixlen_str
= strchr(route_str
, '/');
3597 if (!prefixlen_str
) {
3598 log_link_debug(link
, "Failed to parse route %s", route_str
);
3602 *prefixlen_str
++ = '\0';
3604 r
= sscanf(prefixlen_str
, "%hhu/%hhu/%"SCNu32
"/%hhu/"USEC_FMT
, &prefixlen
, &tos
, &priority
, &table
, &lifetime
);
3606 log_link_debug(link
,
3607 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3612 r
= in_addr_from_string_auto(route_str
, &family
, &route_dst
);
3614 log_link_debug_errno(link
, r
, "Failed to parse route destination %s: %m", route_str
);
3618 r
= route_add(link
, family
, &route_dst
, prefixlen
, tos
, priority
, table
, &route
);
3620 return log_link_error_errno(link
, r
, "Failed to add route: %m");
3622 if (lifetime
!= USEC_INFINITY
&& !kernel_route_expiration_supported()) {
3623 r
= sd_event_add_time(link
->manager
->event
, &expire
, clock_boottime_or_monotonic(), lifetime
,
3624 0, route_expire_handler
, route
);
3626 log_link_warning_errno(link
, r
, "Could not arm route expiration handler: %m");
3629 route
->lifetime
= lifetime
;
3630 sd_event_source_unref(route
->expire
);
3631 route
->expire
= TAKE_PTR(expire
);
3635 if (dhcp4_address
) {
3636 r
= in_addr_from_string(AF_INET
, dhcp4_address
, &address
);
3638 log_link_debug_errno(link
, r
, "Failed to parse DHCPv4 address %s: %m", dhcp4_address
);
3639 goto dhcp4_address_fail
;
3642 r
= sd_dhcp_client_new(&link
->dhcp_client
, link
->network
? link
->network
->dhcp_anonymize
: 0);
3644 return log_link_error_errno(link
, r
, "Failed to create DHCPv4 client: %m");
3646 r
= sd_dhcp_client_set_request_address(link
->dhcp_client
, &address
.in
);
3648 return log_link_error_errno(link
, r
, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address
);
3653 if (ipv4ll_address
) {
3654 r
= in_addr_from_string(AF_INET
, ipv4ll_address
, &address
);
3656 log_link_debug_errno(link
, r
, "Failed to parse IPv4LL address %s: %m", ipv4ll_address
);
3657 goto ipv4ll_address_fail
;
3660 r
= sd_ipv4ll_new(&link
->ipv4ll
);
3662 return log_link_error_errno(link
, r
, "Failed to create IPv4LL client: %m");
3664 r
= sd_ipv4ll_set_address(link
->ipv4ll
, &address
.in
);
3666 return log_link_error_errno(link
, r
, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address
);
3669 ipv4ll_address_fail
:
3674 int link_add(Manager
*m
, sd_netlink_message
*message
, Link
**ret
) {
3675 _cleanup_(sd_device_unrefp
) sd_device
*device
= NULL
;
3676 char ifindex_str
[2 + DECIMAL_STR_MAX(int)];
3685 r
= link_new(m
, message
, ret
);
3691 log_link_debug(link
, "Link %d added", link
->ifindex
);
3693 r
= link_load(link
);
3697 if (detect_container() <= 0) {
3698 /* not in a container, udev will be around */
3699 sprintf(ifindex_str
, "n%d", link
->ifindex
);
3700 r
= sd_device_new_from_device_id(&device
, ifindex_str
);
3702 log_link_warning_errno(link
, r
, "Could not find device: %m");
3706 r
= sd_device_get_is_initialized(device
);
3708 log_link_warning_errno(link
, r
, "Could not determine whether the device is initialized or not: %m");
3713 log_link_debug(link
, "link pending udev initialization...");
3717 r
= device_is_renaming(device
);
3719 log_link_warning_errno(link
, r
, "Failed to determine the device is renamed or not: %m");
3723 log_link_debug(link
, "Interface is under renaming, pending initialization.");
3727 r
= link_initialized(link
, device
);
3731 r
= link_initialized_and_synced(link
);
3738 link_enter_failed(link
);
3742 int link_ipv6ll_gained(Link
*link
, const struct in6_addr
*address
) {
3747 log_link_info(link
, "Gained IPv6LL");
3749 link
->ipv6ll_address
= *address
;
3750 link_check_ready(link
);
3752 if (IN_SET(link
->state
, LINK_STATE_CONFIGURING
, LINK_STATE_CONFIGURED
)) {
3753 r
= link_acquire_ipv6_conf(link
);
3755 link_enter_failed(link
);
3763 static int link_carrier_gained(Link
*link
) {
3768 if (IN_SET(link
->state
, LINK_STATE_CONFIGURING
, LINK_STATE_CONFIGURED
)) {
3769 r
= link_acquire_conf(link
);
3771 link_enter_failed(link
);
3775 r
= link_request_set_addresses(link
);
3780 r
= link_handle_bound_by_list(link
);
3787 static int link_carrier_lost(Link
*link
) {
3792 if (link
->network
&& link
->network
->ignore_carrier_loss
)
3795 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
3796 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3797 * configuration and stop the clients as well. */
3798 if (link
->setting_mtu
)
3801 r
= link_stop_clients(link
);
3803 link_enter_failed(link
);
3807 if (link_dhcp4_server_enabled(link
))
3808 (void) sd_dhcp_server_stop(link
->dhcp_server
);
3810 r
= link_drop_config(link
);
3814 if (!IN_SET(link
->state
, LINK_STATE_UNMANAGED
, LINK_STATE_PENDING
)) {
3815 log_link_debug(link
, "State is %s, dropping config", link_state_to_string(link
->state
));
3816 r
= link_drop_foreign_config(link
);
3821 r
= link_handle_bound_by_list(link
);
3828 int link_carrier_reset(Link
*link
) {
3833 if (link_has_carrier(link
)) {
3834 r
= link_carrier_lost(link
);
3838 r
= link_carrier_gained(link
);
3842 log_link_info(link
, "Reset carrier");
3848 int link_update(Link
*link
, sd_netlink_message
*m
) {
3849 struct ether_addr mac
;
3852 bool had_carrier
, carrier_gained
, carrier_lost
;
3856 assert(link
->ifname
);
3859 if (link
->state
== LINK_STATE_LINGER
) {
3860 log_link_info(link
, "Link re-added");
3861 link_set_state(link
, LINK_STATE_CONFIGURING
);
3863 r
= link_new_carrier_maps(link
);
3868 r
= sd_netlink_message_read_string(m
, IFLA_IFNAME
, &ifname
);
3869 if (r
>= 0 && !streq(ifname
, link
->ifname
)) {
3870 Manager
*manager
= link
->manager
;
3872 log_link_info(link
, "Interface name change detected, %s has been renamed to %s.", link
->ifname
, ifname
);
3875 r
= link_add(manager
, m
, &link
);
3880 r
= sd_netlink_message_read_u32(m
, IFLA_MTU
, &mtu
);
3881 if (r
>= 0 && mtu
> 0) {
3883 if (link
->original_mtu
== 0) {
3884 link
->original_mtu
= mtu
;
3885 log_link_debug(link
, "Saved original MTU: %" PRIu32
, link
->original_mtu
);
3888 if (link
->dhcp_client
) {
3889 r
= sd_dhcp_client_set_mtu(link
->dhcp_client
,
3892 return log_link_warning_errno(link
, r
, "Could not update MTU in DHCP client: %m");
3896 r
= sd_radv_set_mtu(link
->radv
, link
->mtu
);
3898 return log_link_warning_errno(link
, r
, "Could not set MTU for Router Advertisement: %m");
3902 /* The kernel may broadcast NEWLINK messages without the MAC address
3903 set, simply ignore them. */
3904 r
= sd_netlink_message_read_ether_addr(m
, IFLA_ADDRESS
, &mac
);
3906 if (memcmp(link
->mac
.ether_addr_octet
, mac
.ether_addr_octet
,
3909 memcpy(link
->mac
.ether_addr_octet
, mac
.ether_addr_octet
,
3912 log_link_debug(link
, "MAC address: "
3913 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3914 mac
.ether_addr_octet
[0],
3915 mac
.ether_addr_octet
[1],
3916 mac
.ether_addr_octet
[2],
3917 mac
.ether_addr_octet
[3],
3918 mac
.ether_addr_octet
[4],
3919 mac
.ether_addr_octet
[5]);
3922 r
= sd_ipv4ll_set_mac(link
->ipv4ll
, &link
->mac
);
3924 return log_link_warning_errno(link
, r
, "Could not update MAC address in IPv4LL client: %m");
3927 if (link
->dhcp_client
) {
3928 r
= sd_dhcp_client_set_mac(link
->dhcp_client
,
3929 (const uint8_t *) &link
->mac
,
3933 return log_link_warning_errno(link
, r
, "Could not update MAC address in DHCP client: %m");
3935 r
= dhcp4_set_client_identifier(link
);
3940 if (link
->dhcp6_client
) {
3941 const DUID
* duid
= link_get_duid(link
);
3943 r
= sd_dhcp6_client_set_mac(link
->dhcp6_client
,
3944 (const uint8_t *) &link
->mac
,
3948 return log_link_warning_errno(link
, r
, "Could not update MAC address in DHCPv6 client: %m");
3950 if (link
->network
->iaid_set
) {
3951 r
= sd_dhcp6_client_set_iaid(link
->dhcp6_client
,
3952 link
->network
->iaid
);
3954 return log_link_warning_errno(link
, r
, "Could not update DHCPv6 IAID: %m");
3957 r
= sd_dhcp6_client_set_duid(link
->dhcp6_client
,
3959 duid
->raw_data_len
> 0 ? duid
->raw_data
: NULL
,
3960 duid
->raw_data_len
);
3962 return log_link_warning_errno(link
, r
, "Could not update DHCPv6 DUID: %m");
3966 r
= sd_radv_set_mac(link
->radv
, &link
->mac
);
3968 return log_link_warning_errno(link
, r
, "Could not update MAC for Router Advertisement: %m");
3972 r
= sd_ndisc_set_mac(link
->ndisc
, &link
->mac
);
3974 return log_link_warning_errno(link
, r
, "Could not update MAC for ndisc: %m");
3979 had_carrier
= link_has_carrier(link
);
3981 r
= link_update_flags(link
, m
);
3985 r
= link_update_lldp(link
);
3989 carrier_gained
= !had_carrier
&& link_has_carrier(link
);
3990 carrier_lost
= had_carrier
&& !link_has_carrier(link
);
3992 if (carrier_gained
) {
3993 log_link_info(link
, "Gained carrier");
3995 r
= link_carrier_gained(link
);
3998 } else if (carrier_lost
) {
3999 log_link_info(link
, "Lost carrier");
4001 r
= link_carrier_lost(link
);
4009 static void print_link_hashmap(FILE *f
, const char *prefix
, Hashmap
* h
) {
4017 if (hashmap_isempty(h
))
4021 HASHMAP_FOREACH(link
, h
, i
) {
4025 fprintf(f
, "%i", link
->ifindex
);
4032 int link_save(Link
*link
) {
4033 _cleanup_free_
char *temp_path
= NULL
;
4034 _cleanup_fclose_
FILE *f
= NULL
;
4035 const char *admin_state
, *oper_state
;
4042 assert(link
->state_file
);
4043 assert(link
->lease_file
);
4044 assert(link
->manager
);
4046 if (link
->state
== LINK_STATE_LINGER
) {
4047 (void) unlink(link
->state_file
);
4051 link_lldp_save(link
);
4053 admin_state
= link_state_to_string(link
->state
);
4054 assert(admin_state
);
4056 oper_state
= link_operstate_to_string(link
->operstate
);
4059 r
= fopen_temporary(link
->state_file
, &f
, &temp_path
);
4063 (void) fchmod(fileno(f
), 0644);
4066 "# This is private data. Do not parse.\n"
4069 admin_state
, oper_state
);
4071 if (link
->network
) {
4073 sd_dhcp6_lease
*dhcp6_lease
= NULL
;
4074 const char *dhcp_domainname
= NULL
;
4075 char **dhcp6_domains
= NULL
;
4076 char **dhcp_domains
= NULL
;
4079 fprintf(f
, "REQUIRED_FOR_ONLINE=%s\n",
4080 yes_no(link
->network
->required_for_online
));
4082 fprintf(f
, "REQUIRED_OPER_STATE_FOR_ONLINE=%s\n",
4083 strempty(link_operstate_to_string(link
->network
->required_operstate_for_online
)));
4085 if (link
->dhcp6_client
) {
4086 r
= sd_dhcp6_client_get_lease(link
->dhcp6_client
, &dhcp6_lease
);
4087 if (r
< 0 && r
!= -ENOMSG
)
4088 log_link_debug(link
, "No DHCPv6 lease");
4091 fprintf(f
, "NETWORK_FILE=%s\n", link
->network
->filename
);
4096 for (j
= 0; j
< link
->network
->n_dns
; j
++) {
4097 _cleanup_free_
char *b
= NULL
;
4099 r
= in_addr_to_string(link
->network
->dns
[j
].family
,
4100 &link
->network
->dns
[j
].address
, &b
);
4102 log_debug_errno(r
, "Failed to format address, ignoring: %m");
4112 if (link
->network
->dhcp_use_dns
&&
4114 const struct in_addr
*addresses
;
4116 r
= sd_dhcp_lease_get_dns(link
->dhcp_lease
, &addresses
);
4118 if (serialize_in_addrs(f
, addresses
, r
, space
, in4_addr_is_non_local
) > 0)
4122 if (link
->network
->dhcp_use_dns
&& dhcp6_lease
) {
4123 struct in6_addr
*in6_addrs
;
4125 r
= sd_dhcp6_lease_get_dns(dhcp6_lease
, &in6_addrs
);
4129 serialize_in6_addrs(f
, in6_addrs
, r
);
4134 /* Make sure to flush out old entries before we use the NDISC data */
4137 if (link
->network
->ipv6_accept_ra_use_dns
&& link
->ndisc_rdnss
) {
4140 SET_FOREACH(dd
, link
->ndisc_rdnss
, i
) {
4144 serialize_in6_addrs(f
, &dd
->address
, 1);
4153 fputstrv(f
, link
->network
->ntp
, NULL
, &space
);
4155 if (link
->network
->dhcp_use_ntp
&&
4157 const struct in_addr
*addresses
;
4159 r
= sd_dhcp_lease_get_ntp(link
->dhcp_lease
, &addresses
);
4161 if (serialize_in_addrs(f
, addresses
, r
, space
, in4_addr_is_non_local
) > 0)
4165 if (link
->network
->dhcp_use_ntp
&& dhcp6_lease
) {
4166 struct in6_addr
*in6_addrs
;
4169 r
= sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease
,
4174 serialize_in6_addrs(f
, in6_addrs
, r
);
4178 r
= sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease
, &hosts
);
4180 fputstrv(f
, hosts
, NULL
, &space
);
4185 if (link
->network
->dhcp_use_domains
!= DHCP_USE_DOMAINS_NO
) {
4186 if (link
->dhcp_lease
) {
4187 (void) sd_dhcp_lease_get_domainname(link
->dhcp_lease
, &dhcp_domainname
);
4188 (void) sd_dhcp_lease_get_search_domains(link
->dhcp_lease
, &dhcp_domains
);
4191 (void) sd_dhcp6_lease_get_domains(dhcp6_lease
, &dhcp6_domains
);
4194 ordered_set_print(f
, "DOMAINS=", link
->network
->search_domains
);
4196 if (link
->network
->dhcp_use_domains
== DHCP_USE_DOMAINS_YES
) {
4199 if (dhcp_domainname
)
4200 fputs_with_space(f
, dhcp_domainname
, NULL
, &space
);
4202 fputstrv(f
, dhcp_domains
, NULL
, &space
);
4204 fputstrv(f
, dhcp6_domains
, NULL
, &space
);
4206 SET_FOREACH(dd
, link
->ndisc_dnssl
, i
)
4207 fputs_with_space(f
, NDISC_DNSSL_DOMAIN(dd
), NULL
, &space
);
4212 ordered_set_print(f
, "ROUTE_DOMAINS=", link
->network
->route_domains
);
4214 if (link
->network
->dhcp_use_domains
== DHCP_USE_DOMAINS_ROUTE
) {
4217 if (dhcp_domainname
)
4218 fputs_with_space(f
, dhcp_domainname
, NULL
, &space
);
4220 fputstrv(f
, dhcp_domains
, NULL
, &space
);
4222 fputstrv(f
, dhcp6_domains
, NULL
, &space
);
4224 SET_FOREACH(dd
, link
->ndisc_dnssl
, i
)
4225 fputs_with_space(f
, NDISC_DNSSL_DOMAIN(dd
), NULL
, &space
);
4230 fprintf(f
, "LLMNR=%s\n",
4231 resolve_support_to_string(link
->network
->llmnr
));
4232 fprintf(f
, "MDNS=%s\n",
4233 resolve_support_to_string(link
->network
->mdns
));
4234 if (link
->network
->dns_default_route
>= 0)
4235 fprintf(f
, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link
->network
->dns_default_route
));
4237 if (link
->network
->dns_over_tls_mode
!= _DNS_OVER_TLS_MODE_INVALID
)
4238 fprintf(f
, "DNS_OVER_TLS=%s\n",
4239 dns_over_tls_mode_to_string(link
->network
->dns_over_tls_mode
));
4241 if (link
->network
->dnssec_mode
!= _DNSSEC_MODE_INVALID
)
4242 fprintf(f
, "DNSSEC=%s\n",
4243 dnssec_mode_to_string(link
->network
->dnssec_mode
));
4245 if (!set_isempty(link
->network
->dnssec_negative_trust_anchors
)) {
4248 fputs("DNSSEC_NTA=", f
);
4250 SET_FOREACH(n
, link
->network
->dnssec_negative_trust_anchors
, i
)
4251 fputs_with_space(f
, n
, NULL
, &space
);
4255 fputs("ADDRESSES=", f
);
4257 SET_FOREACH(a
, link
->addresses
, i
) {
4258 _cleanup_free_
char *address_str
= NULL
;
4260 r
= in_addr_to_string(a
->family
, &a
->in_addr
, &address_str
);
4264 fprintf(f
, "%s%s/%u", space
? " " : "", address_str
, a
->prefixlen
);
4269 fputs("ROUTES=", f
);
4271 SET_FOREACH(route
, link
->routes
, i
) {
4272 _cleanup_free_
char *route_str
= NULL
;
4274 r
= in_addr_to_string(route
->family
, &route
->dst
, &route_str
);
4278 fprintf(f
, "%s%s/%hhu/%hhu/%"PRIu32
"/%"PRIu32
"/"USEC_FMT
,
4279 space
? " " : "", route_str
,
4280 route
->dst_prefixlen
, route
->tos
, route
->priority
, route
->table
, route
->lifetime
);
4287 print_link_hashmap(f
, "CARRIER_BOUND_TO=", link
->bound_to_links
);
4288 print_link_hashmap(f
, "CARRIER_BOUND_BY=", link
->bound_by_links
);
4290 if (link
->dhcp_lease
) {
4291 struct in_addr address
;
4292 const char *tz
= NULL
;
4294 assert(link
->network
);
4296 r
= sd_dhcp_lease_get_timezone(link
->dhcp_lease
, &tz
);
4298 fprintf(f
, "TIMEZONE=%s\n", tz
);
4300 r
= sd_dhcp_lease_get_address(link
->dhcp_lease
, &address
);
4302 fputs("DHCP4_ADDRESS=", f
);
4303 serialize_in_addrs(f
, &address
, 1, false, NULL
);
4307 r
= dhcp_lease_save(link
->dhcp_lease
, link
->lease_file
);
4315 (void) unlink(link
->lease_file
);
4318 struct in_addr address
;
4320 r
= sd_ipv4ll_get_address(link
->ipv4ll
, &address
);
4322 fputs("IPV4LL_ADDRESS=", f
);
4323 serialize_in_addrs(f
, &address
, 1, false, NULL
);
4328 r
= fflush_and_check(f
);
4332 if (rename(temp_path
, link
->state_file
) < 0) {
4340 (void) unlink(link
->state_file
);
4342 (void) unlink(temp_path
);
4344 return log_link_error_errno(link
, r
, "Failed to save link data to %s: %m", link
->state_file
);
4347 /* The serialized state in /run is no longer up-to-date. */
4348 void link_dirty(Link
*link
) {
4353 /* mark manager dirty as link is dirty */
4354 manager_dirty(link
->manager
);
4356 r
= set_ensure_allocated(&link
->manager
->dirty_links
, NULL
);
4358 /* allocation errors are ignored */
4361 r
= set_put(link
->manager
->dirty_links
, link
);
4363 /* don't take another ref if the link was already dirty */
4369 /* The serialized state in /run is up-to-date */
4370 void link_clean(Link
*link
) {
4372 assert(link
->manager
);
4374 link_unref(set_remove(link
->manager
->dirty_links
, link
));
4377 static const char* const link_state_table
[_LINK_STATE_MAX
] = {
4378 [LINK_STATE_PENDING
] = "pending",
4379 [LINK_STATE_INITIALIZED
] = "initialized",
4380 [LINK_STATE_CONFIGURING
] = "configuring",
4381 [LINK_STATE_CONFIGURED
] = "configured",
4382 [LINK_STATE_UNMANAGED
] = "unmanaged",
4383 [LINK_STATE_FAILED
] = "failed",
4384 [LINK_STATE_LINGER
] = "linger",
4387 DEFINE_STRING_TABLE_LOOKUP(link_state
, LinkState
);