1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 #include <netinet/ether.h>
5 #include <linux/can/netlink.h>
9 #include "alloc-util.h"
11 #include "dhcp-identifier.h"
12 #include "dhcp-lease-internal.h"
16 #include "missing_network.h"
17 #include "netdev/vrf.h"
18 #include "netlink-util.h"
19 #include "network-internal.h"
20 #include "networkd-ipv6-proxy-ndp.h"
21 #include "networkd-lldp-tx.h"
22 #include "networkd-manager.h"
23 #include "networkd-ndisc.h"
24 #include "networkd-neighbor.h"
25 #include "networkd-radv.h"
26 #include "networkd-routing-policy-rule.h"
28 #include "socket-util.h"
29 #include "stdio-util.h"
30 #include "string-table.h"
32 #include "sysctl-util.h"
33 #include "tmpfile-util.h"
34 #include "udev-util.h"
38 uint32_t link_get_vrf_table(Link
*link
) {
39 return link
->network
->vrf
? VRF(link
->network
->vrf
)->table
: RT_TABLE_MAIN
;
42 uint32_t link_get_dhcp_route_table(Link
*link
) {
43 /* When the interface is part of an VRF use the VRFs routing table, unless
44 * another table is explicitly specified. */
45 if (link
->network
->dhcp_route_table_set
)
46 return link
->network
->dhcp_route_table
;
47 return link_get_vrf_table(link
);
50 uint32_t link_get_ipv6_accept_ra_route_table(Link
*link
) {
51 if (link
->network
->ipv6_accept_ra_route_table_set
)
52 return link
->network
->ipv6_accept_ra_route_table
;
53 return link_get_vrf_table(link
);
56 DUID
* link_get_duid(Link
*link
) {
57 if (link
->network
->duid
.type
!= _DUID_TYPE_INVALID
)
58 return &link
->network
->duid
;
60 return &link
->manager
->duid
;
63 static bool link_dhcp6_enabled(Link
*link
) {
66 if (!socket_ipv6_is_supported())
69 if (link
->flags
& IFF_LOOPBACK
)
75 if (link
->network
->bond
)
78 if (manager_sysctl_ipv6_enabled(link
->manager
) == 0)
81 return link
->network
->dhcp
& ADDRESS_FAMILY_IPV6
;
84 static bool link_dhcp4_enabled(Link
*link
) {
87 if (link
->flags
& IFF_LOOPBACK
)
93 if (link
->network
->bond
)
96 return link
->network
->dhcp
& ADDRESS_FAMILY_IPV4
;
99 static bool link_dhcp4_server_enabled(Link
*link
) {
102 if (link
->flags
& IFF_LOOPBACK
)
108 if (link
->network
->bond
)
111 return link
->network
->dhcp_server
;
114 static bool link_ipv4ll_enabled(Link
*link
) {
117 if (link
->flags
& IFF_LOOPBACK
)
123 if (STRPTR_IN_SET(link
->kind
, "vrf", "wireguard"))
126 if (link
->network
->bond
)
129 return link
->network
->link_local
& ADDRESS_FAMILY_IPV4
;
132 static bool link_ipv6ll_enabled(Link
*link
) {
135 if (!socket_ipv6_is_supported())
138 if (link
->flags
& IFF_LOOPBACK
)
144 if (STRPTR_IN_SET(link
->kind
, "vrf", "wireguard"))
147 if (link
->network
->bond
)
150 if (manager_sysctl_ipv6_enabled(link
->manager
) == 0)
153 return link
->network
->link_local
& ADDRESS_FAMILY_IPV6
;
156 static bool link_ipv6_enabled(Link
*link
) {
159 if (!socket_ipv6_is_supported())
162 if (link
->network
->bond
)
165 if (manager_sysctl_ipv6_enabled(link
->manager
) == 0)
168 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
169 return link_ipv6ll_enabled(link
) || network_has_static_ipv6_addresses(link
->network
);
172 static bool link_radv_enabled(Link
*link
) {
175 if (!link_ipv6ll_enabled(link
))
178 return link
->network
->router_prefix_delegation
!= RADV_PREFIX_DELEGATION_NONE
;
181 static bool link_lldp_rx_enabled(Link
*link
) {
184 if (link
->flags
& IFF_LOOPBACK
)
187 if (link
->iftype
!= ARPHRD_ETHER
)
193 /* LLDP should be handled on bridge slaves as those have a direct
194 * connection to their peers not on the bridge master. Linux doesn't
195 * even (by default) forward lldp packets to the bridge master.*/
196 if (streq_ptr("bridge", link
->kind
))
199 return link
->network
->lldp_mode
!= LLDP_MODE_NO
;
202 static bool link_lldp_emit_enabled(Link
*link
) {
205 if (link
->flags
& IFF_LOOPBACK
)
208 if (link
->iftype
!= ARPHRD_ETHER
)
214 return link
->network
->lldp_emit
!= LLDP_EMIT_NO
;
217 static bool link_ipv4_forward_enabled(Link
*link
) {
220 if (link
->flags
& IFF_LOOPBACK
)
226 if (link
->network
->ip_forward
== _ADDRESS_FAMILY_BOOLEAN_INVALID
)
229 return link
->network
->ip_forward
& ADDRESS_FAMILY_IPV4
;
232 static bool link_ipv6_forward_enabled(Link
*link
) {
235 if (!socket_ipv6_is_supported())
238 if (link
->flags
& IFF_LOOPBACK
)
244 if (link
->network
->ip_forward
== _ADDRESS_FAMILY_BOOLEAN_INVALID
)
247 if (manager_sysctl_ipv6_enabled(link
->manager
) == 0)
250 return link
->network
->ip_forward
& ADDRESS_FAMILY_IPV6
;
253 static bool link_proxy_arp_enabled(Link
*link
) {
256 if (link
->flags
& IFF_LOOPBACK
)
262 if (link
->network
->proxy_arp
< 0)
268 static bool link_ipv6_accept_ra_enabled(Link
*link
) {
271 if (!socket_ipv6_is_supported())
274 if (link
->flags
& IFF_LOOPBACK
)
280 if (!link_ipv6ll_enabled(link
))
283 /* If unset use system default (enabled if local forwarding is disabled.
284 * disabled if local forwarding is enabled).
285 * If set, ignore or enforce RA independent of local forwarding state.
287 if (link
->network
->ipv6_accept_ra
< 0)
288 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
289 return !link_ipv6_forward_enabled(link
);
290 else if (link
->network
->ipv6_accept_ra
> 0)
291 /* accept RA even if ip_forward is enabled */
298 static IPv6PrivacyExtensions
link_ipv6_privacy_extensions(Link
*link
) {
301 if (!socket_ipv6_is_supported())
302 return _IPV6_PRIVACY_EXTENSIONS_INVALID
;
304 if (link
->flags
& IFF_LOOPBACK
)
305 return _IPV6_PRIVACY_EXTENSIONS_INVALID
;
308 return _IPV6_PRIVACY_EXTENSIONS_INVALID
;
310 return link
->network
->ipv6_privacy_extensions
;
313 static int link_enable_ipv6(Link
*link
) {
317 if (link
->flags
& IFF_LOOPBACK
)
320 disabled
= !link_ipv6_enabled(link
);
322 r
= sysctl_write_ip_property_boolean(AF_INET6
, link
->ifname
, "disable_ipv6", disabled
);
324 log_link_warning_errno(link
, r
, "Cannot %s IPv6 for interface %s: %m",
325 enable_disable(!disabled
), link
->ifname
);
327 log_link_info(link
, "IPv6 successfully %sd", enable_disable(!disabled
));
332 static bool link_is_enslaved(Link
*link
) {
333 if (link
->flags
& IFF_SLAVE
)
334 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
337 if (!link
->enslaved_raw
)
343 if (link
->network
->bridge
)
344 /* TODO: support the case when link is not managed by networkd. */
350 static void link_update_master_operstate(Link
*link
, NetDev
*netdev
) {
356 if (link_get(link
->manager
, netdev
->ifindex
, &master
) < 0)
359 link_update_operstate(master
, true);
362 void link_update_operstate(Link
*link
, bool also_update_master
) {
363 LinkOperationalState operstate
;
368 if (link
->kernel_operstate
== IF_OPER_DORMANT
)
369 operstate
= LINK_OPERSTATE_DORMANT
;
370 else if (link_has_carrier(link
)) {
372 uint8_t scope
= RT_SCOPE_NOWHERE
;
374 /* if we have carrier, check what addresses we have */
375 SET_FOREACH(address
, link
->addresses
, i
) {
376 if (!address_is_ready(address
))
379 if (address
->scope
< scope
)
380 scope
= address
->scope
;
383 /* for operstate we also take foreign addresses into account */
384 SET_FOREACH(address
, link
->addresses_foreign
, i
) {
385 if (!address_is_ready(address
))
388 if (address
->scope
< scope
)
389 scope
= address
->scope
;
392 if (scope
< RT_SCOPE_SITE
)
393 /* universally accessible addresses found */
394 operstate
= LINK_OPERSTATE_ROUTABLE
;
395 else if (scope
< RT_SCOPE_HOST
)
396 /* only link or site local addresses found */
397 operstate
= LINK_OPERSTATE_DEGRADED
;
399 /* no useful addresses found */
400 operstate
= LINK_OPERSTATE_CARRIER
;
401 } else if (link
->flags
& IFF_UP
)
402 operstate
= LINK_OPERSTATE_NO_CARRIER
;
404 operstate
= LINK_OPERSTATE_OFF
;
406 if (IN_SET(operstate
, LINK_OPERSTATE_DEGRADED
, LINK_OPERSTATE_CARRIER
) &&
407 link_is_enslaved(link
))
408 operstate
= LINK_OPERSTATE_ENSLAVED
;
410 if (operstate
>= LINK_OPERSTATE_CARRIER
) {
413 HASHMAP_FOREACH(slave
, link
->slaves
, i
) {
414 link_update_operstate(slave
, false);
416 if (slave
->operstate
< LINK_OPERSTATE_CARRIER
)
417 operstate
= LINK_OPERSTATE_DEGRADED_CARRIER
;
421 if (link
->operstate
!= operstate
) {
422 link
->operstate
= operstate
;
423 link_send_changed(link
, "OperationalState", NULL
);
427 if (also_update_master
&& link
->network
) {
428 link_update_master_operstate(link
, link
->network
->bond
);
429 link_update_master_operstate(link
, link
->network
->bridge
);
433 #define FLAG_STRING(string, flag, old, new) \
434 (((old ^ new) & flag) \
435 ? ((old & flag) ? (" -" string) : (" +" string)) \
438 static int link_update_flags(Link
*link
, sd_netlink_message
*m
) {
439 unsigned flags
, unknown_flags_added
, unknown_flags_removed
, unknown_flags
;
445 r
= sd_rtnl_message_link_get_flags(m
, &flags
);
447 return log_link_warning_errno(link
, r
, "Could not get link flags: %m");
449 r
= sd_netlink_message_read_u8(m
, IFLA_OPERSTATE
, &operstate
);
451 /* if we got a message without operstate, take it to mean
452 the state was unchanged */
453 operstate
= link
->kernel_operstate
;
455 if ((link
->flags
== flags
) && (link
->kernel_operstate
== operstate
))
458 if (link
->flags
!= flags
) {
459 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",
460 FLAG_STRING("LOOPBACK", IFF_LOOPBACK
, link
->flags
, flags
),
461 FLAG_STRING("MASTER", IFF_MASTER
, link
->flags
, flags
),
462 FLAG_STRING("SLAVE", IFF_SLAVE
, link
->flags
, flags
),
463 FLAG_STRING("UP", IFF_UP
, link
->flags
, flags
),
464 FLAG_STRING("DORMANT", IFF_DORMANT
, link
->flags
, flags
),
465 FLAG_STRING("LOWER_UP", IFF_LOWER_UP
, link
->flags
, flags
),
466 FLAG_STRING("RUNNING", IFF_RUNNING
, link
->flags
, flags
),
467 FLAG_STRING("MULTICAST", IFF_MULTICAST
, link
->flags
, flags
),
468 FLAG_STRING("BROADCAST", IFF_BROADCAST
, link
->flags
, flags
),
469 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT
, link
->flags
, flags
),
470 FLAG_STRING("PROMISC", IFF_PROMISC
, link
->flags
, flags
),
471 FLAG_STRING("ALLMULTI", IFF_ALLMULTI
, link
->flags
, flags
),
472 FLAG_STRING("PORTSEL", IFF_PORTSEL
, link
->flags
, flags
),
473 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA
, link
->flags
, flags
),
474 FLAG_STRING("DYNAMIC", IFF_DYNAMIC
, link
->flags
, flags
),
475 FLAG_STRING("NOARP", IFF_NOARP
, link
->flags
, flags
),
476 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS
, link
->flags
, flags
),
477 FLAG_STRING("DEBUG", IFF_DEBUG
, link
->flags
, flags
),
478 FLAG_STRING("ECHO", IFF_ECHO
, link
->flags
, flags
));
480 unknown_flags
= ~(IFF_LOOPBACK
| IFF_MASTER
| IFF_SLAVE
| IFF_UP
|
481 IFF_DORMANT
| IFF_LOWER_UP
| IFF_RUNNING
|
482 IFF_MULTICAST
| IFF_BROADCAST
| IFF_POINTOPOINT
|
483 IFF_PROMISC
| IFF_ALLMULTI
| IFF_PORTSEL
|
484 IFF_AUTOMEDIA
| IFF_DYNAMIC
| IFF_NOARP
|
485 IFF_NOTRAILERS
| IFF_DEBUG
| IFF_ECHO
);
486 unknown_flags_added
= ((link
->flags
^ flags
) & flags
& unknown_flags
);
487 unknown_flags_removed
= ((link
->flags
^ flags
) & link
->flags
& unknown_flags
);
489 /* link flags are currently at most 18 bits, let's align to
491 if (unknown_flags_added
)
493 "Unknown link flags gained: %#.5x (ignoring)",
494 unknown_flags_added
);
496 if (unknown_flags_removed
)
498 "Unknown link flags lost: %#.5x (ignoring)",
499 unknown_flags_removed
);
503 link
->kernel_operstate
= operstate
;
505 link_update_operstate(link
, true);
510 DEFINE_TRIVIAL_CLEANUP_FUNC(Link
*, link_unref
);
512 static int link_new(Manager
*manager
, sd_netlink_message
*message
, Link
**ret
) {
513 _cleanup_(link_unrefp
) Link
*link
= NULL
;
515 const char *ifname
, *kind
= NULL
;
517 unsigned short iftype
;
523 /* check for link kind */
524 r
= sd_netlink_message_enter_container(message
, IFLA_LINKINFO
);
526 (void) sd_netlink_message_read_string(message
, IFLA_INFO_KIND
, &kind
);
527 r
= sd_netlink_message_exit_container(message
);
532 r
= sd_netlink_message_get_type(message
, &type
);
535 else if (type
!= RTM_NEWLINK
)
538 r
= sd_rtnl_message_link_get_ifindex(message
, &ifindex
);
541 else if (ifindex
<= 0)
544 r
= sd_rtnl_message_link_get_type(message
, &iftype
);
548 r
= sd_netlink_message_read_string(message
, IFLA_IFNAME
, &ifname
);
559 .state
= LINK_STATE_PENDING
,
560 .rtnl_extended_attrs
= true,
565 link
->ifname
= strdup(ifname
);
570 link
->kind
= strdup(kind
);
575 r
= sd_netlink_message_read_u32(message
, IFLA_MASTER
, (uint32_t *)&link
->master_ifindex
);
577 log_link_debug_errno(link
, r
, "New device has no master, continuing without");
579 r
= sd_netlink_message_read_ether_addr(message
, IFLA_ADDRESS
, &link
->mac
);
581 log_link_debug_errno(link
, r
, "MAC address not found for new device, continuing without");
583 if (asprintf(&link
->state_file
, "/run/systemd/netif/links/%d", link
->ifindex
) < 0)
586 if (asprintf(&link
->lease_file
, "/run/systemd/netif/leases/%d", link
->ifindex
) < 0)
589 if (asprintf(&link
->lldp_file
, "/run/systemd/netif/lldp/%d", link
->ifindex
) < 0)
592 r
= hashmap_ensure_allocated(&manager
->links
, NULL
);
596 r
= hashmap_put(manager
->links
, INT_TO_PTR(link
->ifindex
), link
);
600 r
= link_update_flags(link
, message
);
604 *ret
= TAKE_PTR(link
);
609 static void link_detach_from_manager(Link
*link
) {
610 if (!link
|| !link
->manager
)
613 hashmap_remove(link
->manager
->links
, INT_TO_PTR(link
->ifindex
));
614 set_remove(link
->manager
->links_requesting_uuid
, link
);
618 static Link
*link_free(Link
*link
) {
619 Link
*carrier
, *master
;
626 while ((route
= set_first(link
->routes
)))
629 while ((route
= set_first(link
->routes_foreign
)))
632 link
->routes
= set_free(link
->routes
);
633 link
->routes_foreign
= set_free(link
->routes_foreign
);
635 while ((address
= set_first(link
->addresses
)))
636 address_free(address
);
638 while ((address
= set_first(link
->addresses_foreign
)))
639 address_free(address
);
641 link
->addresses
= set_free(link
->addresses
);
642 link
->addresses_foreign
= set_free(link
->addresses_foreign
);
644 while ((address
= link
->pool_addresses
)) {
645 LIST_REMOVE(addresses
, link
->pool_addresses
, address
);
646 address_free(address
);
649 sd_dhcp_server_unref(link
->dhcp_server
);
650 sd_dhcp_client_unref(link
->dhcp_client
);
651 sd_dhcp_lease_unref(link
->dhcp_lease
);
653 link_lldp_emit_stop(link
);
655 free(link
->lease_file
);
657 sd_lldp_unref(link
->lldp
);
658 free(link
->lldp_file
);
662 sd_ipv4ll_unref(link
->ipv4ll
);
663 sd_dhcp6_client_unref(link
->dhcp6_client
);
664 sd_ndisc_unref(link
->ndisc
);
665 sd_radv_unref(link
->radv
);
667 link_detach_from_manager(link
);
673 (void) unlink(link
->state_file
);
674 free(link
->state_file
);
676 sd_device_unref(link
->sd_device
);
678 HASHMAP_FOREACH (carrier
, link
->bound_to_links
, i
)
679 hashmap_remove(link
->bound_to_links
, INT_TO_PTR(carrier
->ifindex
));
680 hashmap_free(link
->bound_to_links
);
682 HASHMAP_FOREACH (carrier
, link
->bound_by_links
, i
)
683 hashmap_remove(link
->bound_by_links
, INT_TO_PTR(carrier
->ifindex
));
684 hashmap_free(link
->bound_by_links
);
686 hashmap_free(link
->slaves
);
689 if (link
->network
->bond
&&
690 link_get(link
->manager
, link
->network
->bond
->ifindex
, &master
) >= 0)
691 (void) hashmap_remove(master
->slaves
, INT_TO_PTR(link
->ifindex
));
693 if (link
->network
->bridge
&&
694 link_get(link
->manager
, link
->network
->bridge
->ifindex
, &master
) >= 0)
695 (void) hashmap_remove(master
->slaves
, INT_TO_PTR(link
->ifindex
));
701 DEFINE_TRIVIAL_REF_UNREF_FUNC(Link
, link
, link_free
);
703 int link_get(Manager
*m
, int ifindex
, Link
**ret
) {
710 link
= hashmap_get(m
->links
, INT_TO_PTR(ifindex
));
719 static void link_set_state(Link
*link
, LinkState state
) {
722 if (link
->state
== state
)
727 link_send_changed(link
, "AdministrativeState", NULL
);
730 static void link_enter_unmanaged(Link
*link
) {
733 log_link_debug(link
, "Unmanaged");
735 link_set_state(link
, LINK_STATE_UNMANAGED
);
740 static int link_stop_clients(Link
*link
) {
744 assert(link
->manager
);
745 assert(link
->manager
->event
);
747 if (link
->dhcp_client
) {
748 k
= sd_dhcp_client_stop(link
->dhcp_client
);
750 r
= log_link_warning_errno(link
, k
, "Could not stop DHCPv4 client: %m");
754 k
= sd_ipv4ll_stop(link
->ipv4ll
);
756 r
= log_link_warning_errno(link
, k
, "Could not stop IPv4 link-local: %m");
759 if (link
->dhcp6_client
) {
760 k
= sd_dhcp6_client_stop(link
->dhcp6_client
);
762 r
= log_link_warning_errno(link
, k
, "Could not stop DHCPv6 client: %m");
766 k
= sd_ndisc_stop(link
->ndisc
);
768 r
= log_link_warning_errno(link
, k
, "Could not stop IPv6 Router Discovery: %m");
772 k
= sd_radv_stop(link
->radv
);
774 r
= log_link_warning_errno(link
, k
, "Could not stop IPv6 Router Advertisement: %m");
777 link_lldp_emit_stop(link
);
781 void link_enter_failed(Link
*link
) {
784 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
787 log_link_warning(link
, "Failed");
789 link_set_state(link
, LINK_STATE_FAILED
);
791 link_stop_clients(link
);
796 static Address
* link_find_dhcp_server_address(Link
*link
) {
800 assert(link
->network
);
802 /* The first statically configured address if there is any */
803 LIST_FOREACH(addresses
, address
, link
->network
->static_addresses
) {
805 if (address
->family
!= AF_INET
)
808 if (in_addr_is_null(address
->family
, &address
->in_addr
))
814 /* If that didn't work, find a suitable address we got from the pool */
815 LIST_FOREACH(addresses
, address
, link
->pool_addresses
) {
816 if (address
->family
!= AF_INET
)
825 static int link_join_netdevs_after_configured(Link
*link
) {
830 HASHMAP_FOREACH(netdev
, link
->network
->stacked_netdevs
, i
) {
831 if (netdev
->ifindex
> 0)
832 /* Assume already enslaved. */
835 if (netdev_get_create_type(netdev
) != NETDEV_CREATE_AFTER_CONFIGURED
)
838 log_struct(LOG_DEBUG
,
839 LOG_LINK_INTERFACE(link
),
840 LOG_NETDEV_INTERFACE(netdev
),
841 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", netdev
->ifname
));
843 r
= netdev_join(netdev
, link
, NULL
);
845 return log_struct_errno(LOG_WARNING
, r
,
846 LOG_LINK_INTERFACE(link
),
847 LOG_NETDEV_INTERFACE(netdev
),
848 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", netdev
->ifname
));
854 static void link_enter_configured(Link
*link
) {
856 assert(link
->network
);
858 if (link
->state
!= LINK_STATE_CONFIGURING
)
861 log_link_info(link
, "Configured");
863 link_set_state(link
, LINK_STATE_CONFIGURED
);
865 (void) link_join_netdevs_after_configured(link
);
870 static int link_request_set_routing_policy_rule(Link
*link
) {
871 RoutingPolicyRule
*rule
, *rrule
= NULL
;
875 assert(link
->network
);
877 link_set_state(link
, LINK_STATE_CONFIGURING
);
878 link
->routing_policy_rules_configured
= false;
880 LIST_FOREACH(rules
, rule
, link
->network
->rules
) {
881 r
= routing_policy_rule_get(link
->manager
, rule
->family
, &rule
->from
, rule
->from_prefixlen
, &rule
->to
,
882 rule
->to_prefixlen
, rule
->tos
, rule
->fwmark
, rule
->table
, rule
->iif
, rule
->oif
,
883 rule
->protocol
, &rule
->sport
, &rule
->dport
, &rrule
);
885 (void) routing_policy_rule_make_local(link
->manager
, rrule
);
889 r
= routing_policy_rule_configure(rule
, link
, NULL
, false);
891 log_link_warning_errno(link
, r
, "Could not set routing policy rules: %m");
892 link_enter_failed(link
);
896 link
->routing_policy_rule_messages
++;
899 routing_policy_rule_purge(link
->manager
, link
);
900 if (link
->routing_policy_rule_messages
== 0) {
901 link
->routing_policy_rules_configured
= true;
902 link_check_ready(link
);
904 log_link_debug(link
, "Setting routing policy rules");
909 static int route_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
913 assert(link
->route_messages
> 0);
914 assert(IN_SET(link
->state
, LINK_STATE_CONFIGURING
,
915 LINK_STATE_FAILED
, LINK_STATE_LINGER
));
917 link
->route_messages
--;
919 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
922 r
= sd_netlink_message_get_errno(m
);
923 if (r
< 0 && r
!= -EEXIST
)
924 log_link_warning_errno(link
, r
, "Could not set route: %m");
926 if (link
->route_messages
== 0) {
927 log_link_debug(link
, "Routes set");
928 link
->static_routes_configured
= true;
929 link_check_ready(link
);
935 static int link_request_set_routes(Link
*link
) {
937 PHASE_NON_GATEWAY
, /* First phase: Routes without a gateway */
938 PHASE_GATEWAY
, /* Second phase: Routes with a gateway */
945 assert(link
->network
);
946 assert(link
->addresses_configured
);
947 assert(link
->address_messages
== 0);
948 assert(link
->state
!= _LINK_STATE_INVALID
);
950 link_set_state(link
, LINK_STATE_CONFIGURING
);
951 link
->static_routes_configured
= false;
953 r
= link_request_set_routing_policy_rule(link
);
957 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
958 for (phase
= 0; phase
< _PHASE_MAX
; phase
++)
959 LIST_FOREACH(routes
, rt
, link
->network
->static_routes
) {
961 if (in_addr_is_null(rt
->family
, &rt
->gw
) != (phase
== PHASE_NON_GATEWAY
))
964 r
= route_configure(rt
, link
, route_handler
);
966 log_link_warning_errno(link
, r
, "Could not set routes: %m");
967 link_enter_failed(link
);
971 link
->route_messages
++;
974 if (link
->route_messages
== 0) {
975 link
->static_routes_configured
= true;
976 link_check_ready(link
);
978 log_link_debug(link
, "Setting routes");
983 void link_check_ready(Link
*link
) {
989 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
995 if (!link
->addresses_configured
)
998 if (!link
->neighbors_configured
)
1001 SET_FOREACH(a
, link
->addresses
, i
)
1002 if (!address_is_ready(a
))
1005 if (!link
->addresses_ready
) {
1006 link
->addresses_ready
= true;
1007 link_request_set_routes(link
);
1010 if (!link
->static_routes_configured
)
1013 if (!link
->routing_policy_rules_configured
)
1016 if (link_ipv4ll_enabled(link
))
1017 if (!link
->ipv4ll_address
||
1018 !link
->ipv4ll_route
)
1021 if (link_ipv6ll_enabled(link
) &&
1022 in_addr_is_null(AF_INET6
, (const union in_addr_union
*) &link
->ipv6ll_address
))
1025 if ((link_dhcp4_enabled(link
) && !link_dhcp6_enabled(link
) &&
1026 !link
->dhcp4_configured
) ||
1027 (link_dhcp6_enabled(link
) && !link_dhcp4_enabled(link
) &&
1028 !link
->dhcp6_configured
) ||
1029 (link_dhcp4_enabled(link
) && link_dhcp6_enabled(link
) &&
1030 !link
->dhcp4_configured
&& !link
->dhcp6_configured
))
1033 if (link_ipv6_accept_ra_enabled(link
) && !link
->ndisc_configured
)
1036 if (link
->state
!= LINK_STATE_CONFIGURED
)
1037 link_enter_configured(link
);
1042 static int link_request_set_neighbors(Link
*link
) {
1047 assert(link
->network
);
1048 assert(link
->state
!= _LINK_STATE_INVALID
);
1050 link_set_state(link
, LINK_STATE_CONFIGURING
);
1051 link
->neighbors_configured
= false;
1053 LIST_FOREACH(neighbors
, neighbor
, link
->network
->neighbors
) {
1054 r
= neighbor_configure(neighbor
, link
, NULL
);
1056 log_link_warning_errno(link
, r
, "Could not set neighbor: %m");
1057 link_enter_failed(link
);
1062 if (link
->neighbor_messages
== 0) {
1063 link
->neighbors_configured
= true;
1064 link_check_ready(link
);
1066 log_link_debug(link
, "Setting neighbors");
1071 static int address_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1077 assert(link
->ifname
);
1078 assert(link
->address_messages
> 0);
1079 assert(IN_SET(link
->state
, LINK_STATE_CONFIGURING
,
1080 LINK_STATE_FAILED
, LINK_STATE_LINGER
));
1082 link
->address_messages
--;
1084 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1087 r
= sd_netlink_message_get_errno(m
);
1088 if (r
< 0 && r
!= -EEXIST
)
1089 log_link_warning_errno(link
, r
, "could not set address: %m");
1091 manager_rtnl_process_address(rtnl
, m
, link
->manager
);
1093 if (link
->address_messages
== 0) {
1094 log_link_debug(link
, "Addresses set");
1095 link
->addresses_configured
= true;
1096 link_check_ready(link
);
1102 static int link_push_uplink_dns_to_dhcp_server(Link
*link
, sd_dhcp_server
*s
) {
1103 _cleanup_free_
struct in_addr
*addresses
= NULL
;
1104 size_t n_addresses
= 0, n_allocated
= 0;
1107 log_debug("Copying DNS server information from %s", link
->ifname
);
1112 for (i
= 0; i
< link
->network
->n_dns
; i
++) {
1115 /* Only look for IPv4 addresses */
1116 if (link
->network
->dns
[i
].family
!= AF_INET
)
1119 ia
= link
->network
->dns
[i
].address
.in
;
1121 /* Never propagate obviously borked data */
1122 if (in4_addr_is_null(&ia
) || in4_addr_is_localhost(&ia
))
1125 if (!GREEDY_REALLOC(addresses
, n_allocated
, n_addresses
+ 1))
1128 addresses
[n_addresses
++] = ia
;
1131 if (link
->network
->dhcp_use_dns
&& link
->dhcp_lease
) {
1132 const struct in_addr
*da
= NULL
;
1135 n
= sd_dhcp_lease_get_dns(link
->dhcp_lease
, &da
);
1138 if (!GREEDY_REALLOC(addresses
, n_allocated
, n_addresses
+ n
))
1141 for (j
= 0; j
< n
; j
++)
1142 if (in4_addr_is_non_local(&da
[j
]))
1143 addresses
[n_addresses
++] = da
[j
];
1147 if (n_addresses
<= 0)
1150 return sd_dhcp_server_set_dns(s
, addresses
, n_addresses
);
1153 static int link_push_uplink_ntp_to_dhcp_server(Link
*link
, sd_dhcp_server
*s
) {
1154 _cleanup_free_
struct in_addr
*addresses
= NULL
;
1155 size_t n_addresses
= 0, n_allocated
= 0;
1161 log_debug("Copying NTP server information from %s", link
->ifname
);
1163 STRV_FOREACH(a
, link
->network
->ntp
) {
1166 /* Only look for IPv4 addresses */
1167 if (inet_pton(AF_INET
, *a
, &ia
) <= 0)
1170 /* Never propagate obviously borked data */
1171 if (in4_addr_is_null(&ia
) || in4_addr_is_localhost(&ia
))
1174 if (!GREEDY_REALLOC(addresses
, n_allocated
, n_addresses
+ 1))
1177 addresses
[n_addresses
++] = ia
;
1180 if (link
->network
->dhcp_use_ntp
&& link
->dhcp_lease
) {
1181 const struct in_addr
*da
= NULL
;
1184 n
= sd_dhcp_lease_get_ntp(link
->dhcp_lease
, &da
);
1187 if (!GREEDY_REALLOC(addresses
, n_allocated
, n_addresses
+ n
))
1190 for (j
= 0; j
< n
; j
++)
1191 if (in4_addr_is_non_local(&da
[j
]))
1192 addresses
[n_addresses
++] = da
[j
];
1196 if (n_addresses
<= 0)
1199 return sd_dhcp_server_set_ntp(s
, addresses
, n_addresses
);
1202 static int link_set_bridge_fdb(Link
*link
) {
1203 FdbEntry
*fdb_entry
;
1206 LIST_FOREACH(static_fdb_entries
, fdb_entry
, link
->network
->static_fdb_entries
) {
1207 r
= fdb_entry_configure(link
, fdb_entry
);
1209 return log_link_error_errno(link
, r
, "Failed to add MAC entry to static MAC table: %m");
1215 static int link_request_set_addresses(Link
*link
) {
1216 AddressLabel
*label
;
1221 assert(link
->network
);
1222 assert(link
->state
!= _LINK_STATE_INVALID
);
1224 link_set_state(link
, LINK_STATE_CONFIGURING
);
1226 /* Reset all *_configured flags we are configuring. */
1227 link
->addresses_configured
= false;
1228 link
->addresses_ready
= false;
1229 link
->neighbors_configured
= false;
1230 link
->static_routes_configured
= false;
1231 link
->routing_policy_rules_configured
= false;
1233 r
= link_set_bridge_fdb(link
);
1237 r
= link_request_set_neighbors(link
);
1241 LIST_FOREACH(addresses
, ad
, link
->network
->static_addresses
) {
1244 update
= address_get(link
, ad
->family
, &ad
->in_addr
, ad
->prefixlen
, NULL
) > 0;
1246 r
= address_configure(ad
, link
, address_handler
, update
);
1248 log_link_warning_errno(link
, r
, "Could not set addresses: %m");
1249 link_enter_failed(link
);
1253 link
->address_messages
++;
1256 LIST_FOREACH(labels
, label
, link
->network
->address_labels
) {
1257 r
= address_label_configure(label
, link
, NULL
, false);
1259 log_link_warning_errno(link
, r
, "Could not set address label: %m");
1260 link_enter_failed(link
);
1264 link
->address_label_messages
++;
1267 /* now that we can figure out a default address for the dhcp server,
1269 if (link_dhcp4_server_enabled(link
) && (link
->flags
& IFF_UP
)) {
1271 Link
*uplink
= NULL
;
1272 bool acquired_uplink
= false;
1274 address
= link_find_dhcp_server_address(link
);
1276 log_link_warning(link
, "Failed to find suitable address for DHCPv4 server instance.");
1277 link_enter_failed(link
);
1281 /* use the server address' subnet as the pool */
1282 r
= sd_dhcp_server_configure_pool(link
->dhcp_server
, &address
->in_addr
.in
, address
->prefixlen
,
1283 link
->network
->dhcp_server_pool_offset
, link
->network
->dhcp_server_pool_size
);
1288 r = sd_dhcp_server_set_router(link->dhcp_server,
1289 &main_address->in_addr.in);
1294 if (link
->network
->dhcp_server_max_lease_time_usec
> 0) {
1295 r
= sd_dhcp_server_set_max_lease_time(
1297 DIV_ROUND_UP(link
->network
->dhcp_server_max_lease_time_usec
, USEC_PER_SEC
));
1302 if (link
->network
->dhcp_server_default_lease_time_usec
> 0) {
1303 r
= sd_dhcp_server_set_default_lease_time(
1305 DIV_ROUND_UP(link
->network
->dhcp_server_default_lease_time_usec
, USEC_PER_SEC
));
1310 if (link
->network
->dhcp_server_emit_dns
) {
1312 if (link
->network
->n_dhcp_server_dns
> 0)
1313 r
= sd_dhcp_server_set_dns(link
->dhcp_server
, link
->network
->dhcp_server_dns
, link
->network
->n_dhcp_server_dns
);
1315 uplink
= manager_find_uplink(link
->manager
, link
);
1316 acquired_uplink
= true;
1319 log_link_debug(link
, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1322 r
= link_push_uplink_dns_to_dhcp_server(uplink
, link
->dhcp_server
);
1325 log_link_warning_errno(link
, r
, "Failed to set DNS server for DHCP server, ignoring: %m");
1328 if (link
->network
->dhcp_server_emit_ntp
) {
1330 if (link
->network
->n_dhcp_server_ntp
> 0)
1331 r
= sd_dhcp_server_set_ntp(link
->dhcp_server
, link
->network
->dhcp_server_ntp
, link
->network
->n_dhcp_server_ntp
);
1333 if (!acquired_uplink
)
1334 uplink
= manager_find_uplink(link
->manager
, link
);
1337 log_link_debug(link
, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1340 r
= link_push_uplink_ntp_to_dhcp_server(uplink
, link
->dhcp_server
);
1344 log_link_warning_errno(link
, r
, "Failed to set NTP server for DHCP server, ignoring: %m");
1347 r
= sd_dhcp_server_set_emit_router(link
->dhcp_server
, link
->network
->dhcp_server_emit_router
);
1349 return log_link_warning_errno(link
, r
, "Failed to set router emission for DHCP server: %m");
1351 if (link
->network
->dhcp_server_emit_timezone
) {
1352 _cleanup_free_
char *buffer
= NULL
;
1353 const char *tz
= NULL
;
1355 if (link
->network
->dhcp_server_timezone
)
1356 tz
= link
->network
->dhcp_server_timezone
;
1358 r
= get_timezone(&buffer
);
1360 log_warning_errno(r
, "Failed to determine timezone: %m");
1366 r
= sd_dhcp_server_set_timezone(link
->dhcp_server
, tz
);
1371 if (!sd_dhcp_server_is_running(link
->dhcp_server
)) {
1372 r
= sd_dhcp_server_start(link
->dhcp_server
);
1374 log_link_warning_errno(link
, r
, "Could not start DHCPv4 server instance: %m");
1376 link_enter_failed(link
);
1382 log_link_debug(link
, "Offering DHCPv4 leases");
1385 if (link
->address_messages
== 0) {
1386 link
->addresses_configured
= true;
1387 link_check_ready(link
);
1389 log_link_debug(link
, "Setting addresses");
1394 static int link_set_bridge_vlan(Link
*link
) {
1397 r
= br_vlan_configure(link
, link
->network
->pvid
, link
->network
->br_vid_bitmap
, link
->network
->br_untagged_bitmap
);
1399 log_link_error_errno(link
, r
, "Failed to assign VLANs to bridge port: %m");
1404 static int link_set_proxy_arp(Link
*link
) {
1407 if (!link_proxy_arp_enabled(link
))
1410 r
= sysctl_write_ip_property_boolean(AF_INET
, link
->ifname
, "proxy_arp", link
->network
->proxy_arp
> 0);
1412 log_link_warning_errno(link
, r
, "Cannot configure proxy ARP for interface: %m");
1417 static int link_set_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1422 log_link_debug(link
, "Set link");
1424 r
= sd_netlink_message_get_errno(m
);
1425 if (r
< 0 && r
!= -EEXIST
) {
1426 log_link_error_errno(link
, r
, "Could not join netdev: %m");
1427 link_enter_failed(link
);
1433 static int link_configure_after_setting_mtu(Link
*link
);
1435 static int set_mtu_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1440 assert(link
->ifname
);
1442 link
->setting_mtu
= false;
1444 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1447 r
= sd_netlink_message_get_errno(m
);
1449 log_link_warning_errno(link
, r
, "Could not set MTU: %m");
1453 log_link_debug(link
, "Setting MTU done.");
1455 if (link
->state
== LINK_STATE_PENDING
)
1456 (void) link_configure_after_setting_mtu(link
);
1461 int link_set_mtu(Link
*link
, uint32_t mtu
, bool force
) {
1462 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1466 assert(link
->manager
);
1467 assert(link
->manager
->rtnl
);
1469 if (mtu
== 0 || link
->setting_mtu
)
1472 if (force
? link
->mtu
== mtu
: link
->mtu
>= mtu
)
1475 log_link_debug(link
, "Setting MTU: %" PRIu32
, mtu
);
1477 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1479 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1481 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
1482 * for this interface, then disable IPv6 else enable it. */
1483 (void) link_enable_ipv6(link
);
1485 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
1486 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1487 if (link_ipv6_enabled(link
) && mtu
< IPV6_MIN_MTU
) {
1489 log_link_warning(link
, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU
) ", as "
1490 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU
) " bytes: %m");
1495 r
= sd_netlink_message_append_u32(req
, IFLA_MTU
, mtu
);
1497 return log_link_error_errno(link
, r
, "Could not append MTU: %m");
1499 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, set_mtu_handler
,
1500 link_netlink_destroy_callback
, link
);
1502 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1505 link
->setting_mtu
= true;
1510 static int set_flags_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1515 assert(link
->ifname
);
1517 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1520 r
= sd_netlink_message_get_errno(m
);
1522 log_link_warning_errno(link
, r
, "Could not set link flags: %m");
1527 static int link_set_flags(Link
*link
) {
1528 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1529 unsigned ifi_change
= 0;
1530 unsigned ifi_flags
= 0;
1534 assert(link
->manager
);
1535 assert(link
->manager
->rtnl
);
1537 if (link
->flags
& IFF_LOOPBACK
)
1543 if (link
->network
->arp
< 0 && link
->network
->multicast
< 0 && link
->network
->allmulticast
< 0)
1546 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1548 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1550 if (link
->network
->arp
>= 0) {
1551 ifi_change
|= IFF_NOARP
;
1552 SET_FLAG(ifi_flags
, IFF_NOARP
, link
->network
->arp
== 0);
1555 if (link
->network
->multicast
>= 0) {
1556 ifi_change
|= IFF_MULTICAST
;
1557 SET_FLAG(ifi_flags
, IFF_MULTICAST
, link
->network
->multicast
);
1560 if (link
->network
->allmulticast
>= 0) {
1561 ifi_change
|= IFF_ALLMULTI
;
1562 SET_FLAG(ifi_flags
, IFF_ALLMULTI
, link
->network
->allmulticast
);
1565 r
= sd_rtnl_message_link_set_flags(req
, ifi_flags
, ifi_change
);
1567 return log_link_error_errno(link
, r
, "Could not set link flags: %m");
1569 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, set_flags_handler
,
1570 link_netlink_destroy_callback
, link
);
1572 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1579 static int link_set_bridge(Link
*link
) {
1580 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1584 assert(link
->network
);
1586 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1588 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1590 r
= sd_rtnl_message_link_set_family(req
, PF_BRIDGE
);
1592 return log_link_error_errno(link
, r
, "Could not set message family: %m");
1594 r
= sd_netlink_message_open_container(req
, IFLA_PROTINFO
);
1596 return log_link_error_errno(link
, r
, "Could not append IFLA_PROTINFO attribute: %m");
1598 if (link
->network
->use_bpdu
>= 0) {
1599 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_GUARD
, link
->network
->use_bpdu
);
1601 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1604 if (link
->network
->hairpin
>= 0) {
1605 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_MODE
, link
->network
->hairpin
);
1607 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_MODE attribute: %m");
1610 if (link
->network
->fast_leave
>= 0) {
1611 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_FAST_LEAVE
, link
->network
->fast_leave
);
1613 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1616 if (link
->network
->allow_port_to_be_root
>= 0) {
1617 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_PROTECT
, link
->network
->allow_port_to_be_root
);
1619 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
1623 if (link
->network
->unicast_flood
>= 0) {
1624 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_UNICAST_FLOOD
, link
->network
->unicast_flood
);
1626 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
1629 if (link
->network
->multicast_flood
>= 0) {
1630 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_MCAST_FLOOD
, link
->network
->multicast_flood
);
1632 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_MCAST_FLOOD attribute: %m");
1635 if (link
->network
->multicast_to_unicast
>= 0) {
1636 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_MCAST_TO_UCAST
, link
->network
->multicast_to_unicast
);
1638 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_MCAST_TO_UCAST attribute: %m");
1641 if (link
->network
->neighbor_suppression
>= 0) {
1642 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_NEIGH_SUPPRESS
, link
->network
->neighbor_suppression
);
1644 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_NEIGH_SUPPRESS attribute: %m");
1647 if (link
->network
->learning
>= 0) {
1648 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_LEARNING
, link
->network
->learning
);
1650 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_LEARNING attribute: %m");
1653 if (link
->network
->cost
!= 0) {
1654 r
= sd_netlink_message_append_u32(req
, IFLA_BRPORT_COST
, link
->network
->cost
);
1656 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_COST attribute: %m");
1659 if (link
->network
->priority
!= LINK_BRIDGE_PORT_PRIORITY_INVALID
) {
1660 r
= sd_netlink_message_append_u16(req
, IFLA_BRPORT_PRIORITY
, link
->network
->priority
);
1662 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1665 r
= sd_netlink_message_close_container(req
);
1667 return log_link_error_errno(link
, r
, "Could not append IFLA_LINKINFO attribute: %m");
1669 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, link_set_handler
,
1670 link_netlink_destroy_callback
, link
);
1672 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1679 static int link_set_bond_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1684 assert(link
->ifname
);
1686 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1689 r
= sd_netlink_message_get_errno(m
);
1691 log_link_warning_errno(link
, r
, "Could not set bonding interface: %m");
1698 static int link_set_bond(Link
*link
) {
1699 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1703 assert(link
->network
);
1705 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_NEWLINK
, link
->network
->bond
->ifindex
);
1707 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1709 r
= sd_netlink_message_set_flags(req
, NLM_F_REQUEST
| NLM_F_ACK
);
1711 return log_link_error_errno(link
, r
, "Could not set netlink flags: %m");
1713 r
= sd_netlink_message_open_container(req
, IFLA_LINKINFO
);
1715 return log_link_error_errno(link
, r
, "Could not append IFLA_PROTINFO attribute: %m");
1717 r
= sd_netlink_message_open_container_union(req
, IFLA_INFO_DATA
, "bond");
1719 return log_link_error_errno(link
, r
, "Could not append IFLA_INFO_DATA attribute: %m");
1721 if (link
->network
->active_slave
) {
1722 r
= sd_netlink_message_append_u32(req
, IFLA_BOND_ACTIVE_SLAVE
, link
->ifindex
);
1724 return log_link_error_errno(link
, r
, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1727 if (link
->network
->primary_slave
) {
1728 r
= sd_netlink_message_append_u32(req
, IFLA_BOND_PRIMARY
, link
->ifindex
);
1730 return log_link_error_errno(link
, r
, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1733 r
= sd_netlink_message_close_container(req
);
1735 return log_link_error_errno(link
, r
, "Could not append IFLA_LINKINFO attribute: %m");
1737 r
= sd_netlink_message_close_container(req
);
1739 return log_link_error_errno(link
, r
, "Could not append IFLA_INFO_DATA attribute: %m");
1741 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, link_set_bond_handler
,
1742 link_netlink_destroy_callback
, link
);
1744 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1751 static int link_append_to_master(Link
*link
, NetDev
*netdev
) {
1758 r
= link_get(link
->manager
, netdev
->ifindex
, &master
);
1762 r
= hashmap_ensure_allocated(&master
->slaves
, NULL
);
1766 r
= hashmap_put(master
->slaves
, INT_TO_PTR(link
->ifindex
), link
);
1773 static int link_lldp_save(Link
*link
) {
1774 _cleanup_free_
char *temp_path
= NULL
;
1775 _cleanup_fclose_
FILE *f
= NULL
;
1776 sd_lldp_neighbor
**l
= NULL
;
1780 assert(link
->lldp_file
);
1783 (void) unlink(link
->lldp_file
);
1787 r
= sd_lldp_get_neighbors(link
->lldp
, &l
);
1791 (void) unlink(link
->lldp_file
);
1797 r
= fopen_temporary(link
->lldp_file
, &f
, &temp_path
);
1801 fchmod(fileno(f
), 0644);
1803 for (i
= 0; i
< n
; i
++) {
1808 r
= sd_lldp_neighbor_get_raw(l
[i
], &p
, &sz
);
1813 (void) fwrite(&u
, 1, sizeof(u
), f
);
1814 (void) fwrite(p
, 1, sz
, f
);
1817 r
= fflush_and_check(f
);
1821 if (rename(temp_path
, link
->lldp_file
) < 0) {
1828 (void) unlink(link
->lldp_file
);
1830 (void) unlink(temp_path
);
1832 log_link_error_errno(link
, r
, "Failed to save LLDP data to %s: %m", link
->lldp_file
);
1836 for (i
= 0; i
< n
; i
++)
1837 sd_lldp_neighbor_unref(l
[i
]);
1844 static void lldp_handler(sd_lldp
*lldp
, sd_lldp_event event
, sd_lldp_neighbor
*n
, void *userdata
) {
1845 Link
*link
= userdata
;
1850 (void) link_lldp_save(link
);
1852 if (link_lldp_emit_enabled(link
) && event
== SD_LLDP_EVENT_ADDED
) {
1853 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1855 log_link_debug(link
, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1857 r
= link_lldp_emit_start(link
);
1859 log_link_warning_errno(link
, r
, "Failed to restart LLDP transmission: %m");
1863 static int link_acquire_ipv6_conf(Link
*link
) {
1868 if (link_ipv6_accept_ra_enabled(link
)) {
1869 assert(link
->ndisc
);
1871 log_link_debug(link
, "Discovering IPv6 routers");
1873 r
= sd_ndisc_start(link
->ndisc
);
1874 if (r
< 0 && r
!= -EBUSY
)
1875 return log_link_warning_errno(link
, r
, "Could not start IPv6 Router Discovery: %m");
1878 if (link_radv_enabled(link
)) {
1880 assert(in_addr_is_link_local(AF_INET6
, (const union in_addr_union
*)&link
->ipv6ll_address
) > 0);
1882 log_link_debug(link
, "Starting IPv6 Router Advertisements");
1884 r
= sd_radv_start(link
->radv
);
1885 if (r
< 0 && r
!= -EBUSY
)
1886 return log_link_warning_errno(link
, r
, "Could not start IPv6 Router Advertisement: %m");
1889 (void) dhcp6_request_prefix_delegation(link
);
1894 static int link_acquire_ipv4_conf(Link
*link
) {
1898 assert(link
->network
);
1899 assert(link
->manager
);
1900 assert(link
->manager
->event
);
1902 if (link_ipv4ll_enabled(link
)) {
1903 assert(link
->ipv4ll
);
1905 log_link_debug(link
, "Acquiring IPv4 link-local address");
1907 r
= sd_ipv4ll_start(link
->ipv4ll
);
1909 return log_link_warning_errno(link
, r
, "Could not acquire IPv4 link-local address: %m");
1912 if (link_dhcp4_enabled(link
)) {
1913 assert(link
->dhcp_client
);
1915 log_link_debug(link
, "Acquiring DHCPv4 lease");
1917 r
= sd_dhcp_client_start(link
->dhcp_client
);
1919 return log_link_warning_errno(link
, r
, "Could not acquire DHCPv4 lease: %m");
1925 static int link_acquire_conf(Link
*link
) {
1930 r
= link_acquire_ipv4_conf(link
);
1934 if (!in_addr_is_null(AF_INET6
, (const union in_addr_union
*) &link
->ipv6ll_address
)) {
1935 r
= link_acquire_ipv6_conf(link
);
1940 if (link_lldp_emit_enabled(link
)) {
1941 r
= link_lldp_emit_start(link
);
1943 return log_link_warning_errno(link
, r
, "Failed to start LLDP transmission: %m");
1949 bool link_has_carrier(Link
*link
) {
1950 /* see Documentation/networking/operstates.txt in the kernel sources */
1952 if (link
->kernel_operstate
== IF_OPER_UP
)
1955 if (link
->kernel_operstate
== IF_OPER_UNKNOWN
)
1956 /* operstate may not be implemented, so fall back to flags */
1957 if ((link
->flags
& IFF_LOWER_UP
) && !(link
->flags
& IFF_DORMANT
))
1963 static int link_address_genmode_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1968 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1971 r
= sd_netlink_message_get_errno(m
);
1973 log_link_warning_errno(link
, r
, "Could not set address genmode for interface: %m");
1978 static int link_configure_addrgen_mode(Link
*link
) {
1979 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1980 uint8_t ipv6ll_mode
;
1984 assert(link
->network
);
1985 assert(link
->manager
);
1986 assert(link
->manager
->rtnl
);
1988 log_link_debug(link
, "Setting address genmode for link");
1990 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1992 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1994 r
= sd_netlink_message_open_container(req
, IFLA_AF_SPEC
);
1996 return log_link_error_errno(link
, r
, "Could not open IFLA_AF_SPEC container: %m");
1998 r
= sd_netlink_message_open_container(req
, AF_INET6
);
2000 return log_link_error_errno(link
, r
, "Could not open AF_INET6 container: %m");
2002 if (!link_ipv6ll_enabled(link
))
2003 ipv6ll_mode
= IN6_ADDR_GEN_MODE_NONE
;
2004 else if (sysctl_read_ip_property(AF_INET6
, link
->ifname
, "stable_secret", NULL
) < 0)
2005 /* The file may not exist. And event if it exists, when stable_secret is unset,
2006 * reading the file fails with EIO. */
2007 ipv6ll_mode
= IN6_ADDR_GEN_MODE_EUI64
;
2009 ipv6ll_mode
= IN6_ADDR_GEN_MODE_STABLE_PRIVACY
;
2011 r
= sd_netlink_message_append_u8(req
, IFLA_INET6_ADDR_GEN_MODE
, ipv6ll_mode
);
2013 return log_link_error_errno(link
, r
, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
2015 r
= sd_netlink_message_close_container(req
);
2017 return log_link_error_errno(link
, r
, "Could not close AF_INET6 container: %m");
2019 r
= sd_netlink_message_close_container(req
);
2021 return log_link_error_errno(link
, r
, "Could not close IFLA_AF_SPEC container: %m");
2023 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, link_address_genmode_handler
,
2024 link_netlink_destroy_callback
, link
);
2026 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
2033 static int link_up_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
2038 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
2041 r
= sd_netlink_message_get_errno(m
);
2043 /* we warn but don't fail the link, as it may be brought up later */
2044 log_link_warning_errno(link
, r
, "Could not bring up interface: %m");
2049 static int link_up(Link
*link
) {
2050 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
2054 assert(link
->network
);
2055 assert(link
->manager
);
2056 assert(link
->manager
->rtnl
);
2058 log_link_debug(link
, "Bringing link up");
2060 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
2062 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
2064 /* set it free if not enslaved with networkd */
2065 if (!link
->network
->bridge
&& !link
->network
->bond
&& !link
->network
->vrf
) {
2066 r
= sd_netlink_message_append_u32(req
, IFLA_MASTER
, 0);
2068 return log_link_error_errno(link
, r
, "Could not append IFLA_MASTER attribute: %m");
2071 r
= sd_rtnl_message_link_set_flags(req
, IFF_UP
, IFF_UP
);
2073 return log_link_error_errno(link
, r
, "Could not set link flags: %m");
2075 if (link
->network
->mac
) {
2076 r
= sd_netlink_message_append_ether_addr(req
, IFLA_ADDRESS
, link
->network
->mac
);
2078 return log_link_error_errno(link
, r
, "Could not set MAC address: %m");
2081 if (link_ipv6_enabled(link
)) {
2082 r
= sd_netlink_message_open_container(req
, IFLA_AF_SPEC
);
2084 return log_link_error_errno(link
, r
, "Could not open IFLA_AF_SPEC container: %m");
2086 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
2087 r
= sd_netlink_message_open_container(req
, AF_INET6
);
2089 return log_link_error_errno(link
, r
, "Could not open AF_INET6 container: %m");
2091 if (!in_addr_is_null(AF_INET6
, &link
->network
->ipv6_token
)) {
2092 r
= sd_netlink_message_append_in6_addr(req
, IFLA_INET6_TOKEN
, &link
->network
->ipv6_token
.in6
);
2094 return log_link_error_errno(link
, r
, "Could not append IFLA_INET6_TOKEN: %m");
2097 r
= sd_netlink_message_close_container(req
);
2099 return log_link_error_errno(link
, r
, "Could not close AF_INET6 container: %m");
2101 r
= sd_netlink_message_close_container(req
);
2103 return log_link_error_errno(link
, r
, "Could not close IFLA_AF_SPEC container: %m");
2106 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, link_up_handler
,
2107 link_netlink_destroy_callback
, link
);
2109 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
2116 static int link_up_can(Link
*link
) {
2117 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
2122 log_link_debug(link
, "Bringing CAN link up");
2124 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
2126 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
2128 r
= sd_rtnl_message_link_set_flags(req
, IFF_UP
, IFF_UP
);
2130 return log_link_error_errno(link
, r
, "Could not set link flags: %m");
2132 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, link_up_handler
,
2133 link_netlink_destroy_callback
, link
);
2135 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
2142 static int link_set_can(Link
*link
) {
2143 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*m
= NULL
;
2147 assert(link
->network
);
2148 assert(link
->manager
);
2149 assert(link
->manager
->rtnl
);
2151 log_link_debug(link
, "link_set_can");
2153 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &m
, RTM_NEWLINK
, link
->ifindex
);
2155 return log_link_error_errno(link
, r
, "Failed to allocate netlink message: %m");
2157 r
= sd_netlink_message_set_flags(m
, NLM_F_REQUEST
| NLM_F_ACK
);
2159 return log_link_error_errno(link
, r
, "Could not set netlink flags: %m");
2161 r
= sd_netlink_message_open_container(m
, IFLA_LINKINFO
);
2163 return log_link_error_errno(link
, r
, "Failed to open netlink container: %m");
2165 r
= sd_netlink_message_open_container_union(m
, IFLA_INFO_DATA
, link
->kind
);
2167 return log_link_error_errno(link
, r
, "Could not append IFLA_INFO_DATA attribute: %m");
2169 if (link
->network
->can_bitrate
> 0 || link
->network
->can_sample_point
> 0) {
2170 struct can_bittiming bt
= {
2171 .bitrate
= link
->network
->can_bitrate
,
2172 .sample_point
= link
->network
->can_sample_point
,
2175 if (link
->network
->can_bitrate
> UINT32_MAX
) {
2176 log_link_error(link
, "bitrate (%zu) too big.", link
->network
->can_bitrate
);
2180 log_link_debug(link
, "Setting bitrate = %d bit/s", bt
.bitrate
);
2181 if (link
->network
->can_sample_point
> 0)
2182 log_link_debug(link
, "Setting sample point = %d.%d%%", bt
.sample_point
/ 10, bt
.sample_point
% 10);
2184 log_link_debug(link
, "Using default sample point");
2186 r
= sd_netlink_message_append_data(m
, IFLA_CAN_BITTIMING
, &bt
, sizeof(bt
));
2188 return log_link_error_errno(link
, r
, "Could not append IFLA_CAN_BITTIMING attribute: %m");
2191 if (link
->network
->can_restart_us
> 0) {
2192 char time_string
[FORMAT_TIMESPAN_MAX
];
2193 uint64_t restart_ms
;
2195 if (link
->network
->can_restart_us
== USEC_INFINITY
)
2198 restart_ms
= DIV_ROUND_UP(link
->network
->can_restart_us
, USEC_PER_MSEC
);
2200 format_timespan(time_string
, FORMAT_TIMESPAN_MAX
, restart_ms
* 1000, MSEC_PER_SEC
);
2202 if (restart_ms
> UINT32_MAX
) {
2203 log_link_error(link
, "restart timeout (%s) too big.", time_string
);
2207 log_link_debug(link
, "Setting restart = %s", time_string
);
2209 r
= sd_netlink_message_append_u32(m
, IFLA_CAN_RESTART_MS
, restart_ms
);
2211 return log_link_error_errno(link
, r
, "Could not append IFLA_CAN_RESTART_MS attribute: %m");
2214 if (link
->network
->can_triple_sampling
>= 0) {
2215 struct can_ctrlmode cm
= {
2216 .mask
= CAN_CTRLMODE_3_SAMPLES
,
2217 .flags
= link
->network
->can_triple_sampling
? CAN_CTRLMODE_3_SAMPLES
: 0,
2220 log_link_debug(link
, "%sabling triple-sampling", link
->network
->can_triple_sampling
? "En" : "Dis");
2222 r
= sd_netlink_message_append_data(m
, IFLA_CAN_CTRLMODE
, &cm
, sizeof(cm
));
2224 return log_link_error_errno(link
, r
, "Could not append IFLA_CAN_CTRLMODE attribute: %m");
2227 r
= sd_netlink_message_close_container(m
);
2229 return log_link_error_errno(link
, r
, "Failed to close netlink container: %m");
2231 r
= sd_netlink_message_close_container(m
);
2233 return log_link_error_errno(link
, r
, "Failed to close netlink container: %m");
2235 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, m
, link_set_handler
,
2236 link_netlink_destroy_callback
, link
);
2238 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
2242 if (!(link
->flags
& IFF_UP
)) {
2243 r
= link_up_can(link
);
2245 link_enter_failed(link
);
2250 log_link_debug(link
, "link_set_can done");
2255 static int link_down_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
2260 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
2263 r
= sd_netlink_message_get_errno(m
);
2265 log_link_warning_errno(link
, r
, "Could not bring down interface: %m");
2267 if (streq_ptr(link
->kind
, "can"))
2273 int link_down(Link
*link
) {
2274 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
2278 assert(link
->manager
);
2279 assert(link
->manager
->rtnl
);
2281 log_link_debug(link
, "Bringing link down");
2283 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
,
2284 RTM_SETLINK
, link
->ifindex
);
2286 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
2288 r
= sd_rtnl_message_link_set_flags(req
, 0, IFF_UP
);
2290 return log_link_error_errno(link
, r
, "Could not set link flags: %m");
2292 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, link_down_handler
,
2293 link_netlink_destroy_callback
, link
);
2295 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
2302 static int link_handle_bound_to_list(Link
*link
) {
2306 bool required_up
= false;
2307 bool link_is_up
= false;
2311 if (hashmap_isempty(link
->bound_to_links
))
2314 if (link
->flags
& IFF_UP
)
2317 HASHMAP_FOREACH (l
, link
->bound_to_links
, i
)
2318 if (link_has_carrier(l
)) {
2323 if (!required_up
&& link_is_up
) {
2324 r
= link_down(link
);
2327 } else if (required_up
&& !link_is_up
) {
2336 static int link_handle_bound_by_list(Link
*link
) {
2343 if (hashmap_isempty(link
->bound_by_links
))
2346 HASHMAP_FOREACH (l
, link
->bound_by_links
, i
) {
2347 r
= link_handle_bound_to_list(l
);
2355 static int link_put_carrier(Link
*link
, Link
*carrier
, Hashmap
**h
) {
2361 if (link
== carrier
)
2364 if (hashmap_get(*h
, INT_TO_PTR(carrier
->ifindex
)))
2367 r
= hashmap_ensure_allocated(h
, NULL
);
2371 r
= hashmap_put(*h
, INT_TO_PTR(carrier
->ifindex
), carrier
);
2378 static int link_new_bound_by_list(Link
*link
) {
2383 bool list_updated
= false;
2386 assert(link
->manager
);
2390 HASHMAP_FOREACH(carrier
, m
->links
, i
) {
2391 if (!carrier
->network
)
2394 if (strv_isempty(carrier
->network
->bind_carrier
))
2397 if (strv_fnmatch(carrier
->network
->bind_carrier
, link
->ifname
, 0)) {
2398 r
= link_put_carrier(link
, carrier
, &link
->bound_by_links
);
2402 list_updated
= true;
2409 HASHMAP_FOREACH(carrier
, link
->bound_by_links
, i
) {
2410 r
= link_put_carrier(carrier
, link
, &carrier
->bound_to_links
);
2414 link_dirty(carrier
);
2420 static int link_new_bound_to_list(Link
*link
) {
2425 bool list_updated
= false;
2428 assert(link
->manager
);
2433 if (strv_isempty(link
->network
->bind_carrier
))
2438 HASHMAP_FOREACH (carrier
, m
->links
, i
) {
2439 if (strv_fnmatch(link
->network
->bind_carrier
, carrier
->ifname
, 0)) {
2440 r
= link_put_carrier(link
, carrier
, &link
->bound_to_links
);
2444 list_updated
= true;
2451 HASHMAP_FOREACH (carrier
, link
->bound_to_links
, i
) {
2452 r
= link_put_carrier(carrier
, link
, &carrier
->bound_by_links
);
2456 link_dirty(carrier
);
2462 static int link_new_carrier_maps(Link
*link
) {
2465 r
= link_new_bound_by_list(link
);
2469 r
= link_handle_bound_by_list(link
);
2473 r
= link_new_bound_to_list(link
);
2477 r
= link_handle_bound_to_list(link
);
2484 static void link_free_bound_to_list(Link
*link
) {
2488 HASHMAP_FOREACH (bound_to
, link
->bound_to_links
, i
) {
2489 hashmap_remove(link
->bound_to_links
, INT_TO_PTR(bound_to
->ifindex
));
2491 if (hashmap_remove(bound_to
->bound_by_links
, INT_TO_PTR(link
->ifindex
)))
2492 link_dirty(bound_to
);
2498 static void link_free_bound_by_list(Link
*link
) {
2502 HASHMAP_FOREACH (bound_by
, link
->bound_by_links
, i
) {
2503 hashmap_remove(link
->bound_by_links
, INT_TO_PTR(bound_by
->ifindex
));
2505 if (hashmap_remove(bound_by
->bound_to_links
, INT_TO_PTR(link
->ifindex
))) {
2506 link_dirty(bound_by
);
2507 link_handle_bound_to_list(bound_by
);
2514 static void link_free_carrier_maps(Link
*link
) {
2515 bool list_updated
= false;
2519 if (!hashmap_isempty(link
->bound_to_links
)) {
2520 link_free_bound_to_list(link
);
2521 list_updated
= true;
2524 if (!hashmap_isempty(link
->bound_by_links
)) {
2525 link_free_bound_by_list(link
);
2526 list_updated
= true;
2535 void link_drop(Link
*link
) {
2536 if (!link
|| link
->state
== LINK_STATE_LINGER
)
2539 link_set_state(link
, LINK_STATE_LINGER
);
2541 link_free_carrier_maps(link
);
2543 log_link_debug(link
, "Link removed");
2545 (void) unlink(link
->state_file
);
2547 link_detach_from_manager(link
);
2554 static int link_joined(Link
*link
) {
2558 assert(link
->network
);
2560 if (!hashmap_isempty(link
->bound_to_links
)) {
2561 r
= link_handle_bound_to_list(link
);
2564 } else if (!(link
->flags
& IFF_UP
)) {
2567 link_enter_failed(link
);
2572 if (link
->network
->bridge
) {
2573 r
= link_set_bridge(link
);
2575 log_link_error_errno(link
, r
, "Could not set bridge message: %m");
2577 r
= link_append_to_master(link
, link
->network
->bridge
);
2579 log_link_error_errno(link
, r
, "Failed to add to bridge master's slave list: %m");
2582 if (link
->network
->bond
) {
2583 r
= link_set_bond(link
);
2585 log_link_error_errno(link
, r
, "Could not set bond message: %m");
2587 r
= link_append_to_master(link
, link
->network
->bond
);
2589 log_link_error_errno(link
, r
, "Failed to add to bond master's slave list: %m");
2592 if (link
->network
->use_br_vlan
&&
2593 (link
->network
->bridge
|| streq_ptr("bridge", link
->kind
))) {
2594 r
= link_set_bridge_vlan(link
);
2596 log_link_error_errno(link
, r
, "Could not set bridge vlan: %m");
2599 /* Skip setting up addresses until it gets carrier,
2600 or it would try to set addresses twice,
2601 which is bad for non-idempotent steps. */
2602 if (!link_has_carrier(link
) && !link
->network
->configure_without_carrier
)
2605 return link_request_set_addresses(link
);
2608 static int netdev_join_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
2612 assert(link
->network
);
2613 assert(link
->enslaving
> 0);
2614 assert(!link
->enslaved_raw
);
2618 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
2621 r
= sd_netlink_message_get_errno(m
);
2622 if (r
< 0 && r
!= -EEXIST
) {
2623 log_link_error_errno(link
, r
, "Could not join netdev: %m");
2624 link_enter_failed(link
);
2627 log_link_debug(link
, "Joined netdev");
2629 if (link
->enslaving
== 0) {
2630 link
->enslaved_raw
= true;
2637 static int link_enter_join_netdev(Link
*link
) {
2643 assert(link
->network
);
2644 assert(link
->state
== LINK_STATE_PENDING
);
2646 link_set_state(link
, LINK_STATE_CONFIGURING
);
2649 link
->enslaving
= 0;
2650 link
->enslaved_raw
= false;
2652 if (link
->network
->bond
) {
2653 if (link
->network
->bond
->state
== NETDEV_STATE_READY
&&
2654 link
->network
->bond
->ifindex
== link
->master_ifindex
)
2655 return link_joined(link
);
2657 log_struct(LOG_DEBUG
,
2658 LOG_LINK_INTERFACE(link
),
2659 LOG_NETDEV_INTERFACE(link
->network
->bond
),
2660 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", link
->network
->bond
->ifname
));
2664 r
= netdev_join(link
->network
->bond
, link
, netdev_join_handler
);
2666 log_struct_errno(LOG_WARNING
, r
,
2667 LOG_LINK_INTERFACE(link
),
2668 LOG_NETDEV_INTERFACE(link
->network
->bond
),
2669 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", link
->network
->bond
->ifname
));
2670 link_enter_failed(link
);
2675 if (link
->network
->bridge
) {
2676 log_struct(LOG_DEBUG
,
2677 LOG_LINK_INTERFACE(link
),
2678 LOG_NETDEV_INTERFACE(link
->network
->bridge
),
2679 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", link
->network
->bridge
->ifname
));
2683 r
= netdev_join(link
->network
->bridge
, link
, netdev_join_handler
);
2685 log_struct_errno(LOG_WARNING
, r
,
2686 LOG_LINK_INTERFACE(link
),
2687 LOG_NETDEV_INTERFACE(link
->network
->bridge
),
2688 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", link
->network
->bridge
->ifname
));
2689 link_enter_failed(link
);
2694 if (link
->network
->vrf
) {
2695 log_struct(LOG_DEBUG
,
2696 LOG_LINK_INTERFACE(link
),
2697 LOG_NETDEV_INTERFACE(link
->network
->vrf
),
2698 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", link
->network
->vrf
->ifname
));
2702 r
= netdev_join(link
->network
->vrf
, link
, netdev_join_handler
);
2704 log_struct_errno(LOG_WARNING
, r
,
2705 LOG_LINK_INTERFACE(link
),
2706 LOG_NETDEV_INTERFACE(link
->network
->vrf
),
2707 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", link
->network
->vrf
->ifname
));
2708 link_enter_failed(link
);
2713 HASHMAP_FOREACH(netdev
, link
->network
->stacked_netdevs
, i
) {
2715 if (netdev
->ifindex
> 0)
2716 /* Assume already enslaved. */
2719 if (netdev_get_create_type(netdev
) != NETDEV_CREATE_STACKED
)
2722 log_struct(LOG_DEBUG
,
2723 LOG_LINK_INTERFACE(link
),
2724 LOG_NETDEV_INTERFACE(netdev
),
2725 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", netdev
->ifname
));
2729 r
= netdev_join(netdev
, link
, netdev_join_handler
);
2731 log_struct_errno(LOG_WARNING
, r
,
2732 LOG_LINK_INTERFACE(link
),
2733 LOG_NETDEV_INTERFACE(netdev
),
2734 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", netdev
->ifname
));
2735 link_enter_failed(link
);
2740 if (link
->enslaving
== 0)
2741 return link_joined(link
);
2746 static int link_set_ipv4_forward(Link
*link
) {
2749 if (!link_ipv4_forward_enabled(link
))
2752 /* We propagate the forwarding flag from one interface to the
2753 * global setting one way. This means: as long as at least one
2754 * interface was configured at any time that had IP forwarding
2755 * enabled the setting will stay on for good. We do this
2756 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2757 * somewhat in sync (see below). */
2759 r
= sysctl_write_ip_property(AF_INET
, NULL
, "ip_forward", "1");
2761 log_link_warning_errno(link
, r
, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
2766 static int link_set_ipv6_forward(Link
*link
) {
2769 if (!link_ipv6_forward_enabled(link
))
2772 /* On Linux, the IPv6 stack does not know a per-interface
2773 * packet forwarding setting: either packet forwarding is on
2774 * for all, or off for all. We hence don't bother with a
2775 * per-interface setting, but simply propagate the interface
2776 * flag, if it is set, to the global flag, one-way. Note that
2777 * while IPv4 would allow a per-interface flag, we expose the
2778 * same behaviour there and also propagate the setting from
2779 * one to all, to keep things simple (see above). */
2781 r
= sysctl_write_ip_property(AF_INET6
, "all", "forwarding", "1");
2783 log_link_warning_errno(link
, r
, "Cannot configure IPv6 packet forwarding, ignoring: %m");
2788 static int link_set_ipv6_privacy_extensions(Link
*link
) {
2789 IPv6PrivacyExtensions s
;
2792 s
= link_ipv6_privacy_extensions(link
);
2796 r
= sysctl_write_ip_property_int(AF_INET6
, link
->ifname
, "use_tempaddr", (int) link
->network
->ipv6_privacy_extensions
);
2798 log_link_warning_errno(link
, r
, "Cannot configure IPv6 privacy extension for interface: %m");
2803 static int link_set_ipv6_accept_ra(Link
*link
) {
2806 /* Make this a NOP if IPv6 is not available */
2807 if (!socket_ipv6_is_supported())
2810 if (link
->flags
& IFF_LOOPBACK
)
2816 r
= sysctl_write_ip_property(AF_INET6
, link
->ifname
, "accept_ra", "0");
2818 log_link_warning_errno(link
, r
, "Cannot disable kernel IPv6 accept_ra for interface: %m");
2823 static int link_set_ipv6_dad_transmits(Link
*link
) {
2826 /* Make this a NOP if IPv6 is not available */
2827 if (!socket_ipv6_is_supported())
2830 if (link
->flags
& IFF_LOOPBACK
)
2836 if (link
->network
->ipv6_dad_transmits
< 0)
2839 r
= sysctl_write_ip_property_int(AF_INET6
, link
->ifname
, "dad_transmits", link
->network
->ipv6_dad_transmits
);
2841 log_link_warning_errno(link
, r
, "Cannot set IPv6 dad transmits for interface: %m");
2846 static int link_set_ipv6_hop_limit(Link
*link
) {
2849 /* Make this a NOP if IPv6 is not available */
2850 if (!socket_ipv6_is_supported())
2853 if (link
->flags
& IFF_LOOPBACK
)
2859 if (link
->network
->ipv6_hop_limit
< 0)
2862 r
= sysctl_write_ip_property_int(AF_INET6
, link
->ifname
, "hop_limit", link
->network
->ipv6_hop_limit
);
2864 log_link_warning_errno(link
, r
, "Cannot set IPv6 hop limit for interface: %m");
2869 static int link_set_ipv6_mtu(Link
*link
) {
2872 /* Make this a NOP if IPv6 is not available */
2873 if (!socket_ipv6_is_supported())
2876 if (link
->flags
& IFF_LOOPBACK
)
2879 if (link
->network
->ipv6_mtu
== 0)
2882 r
= sysctl_write_ip_property_uint32(AF_INET6
, link
->ifname
, "mtu", link
->network
->ipv6_mtu
);
2884 log_link_warning_errno(link
, r
, "Cannot set IPv6 MTU for interface: %m");
2889 static bool link_is_static_address_configured(Link
*link
, Address
*address
) {
2890 Address
*net_address
;
2898 LIST_FOREACH(addresses
, net_address
, link
->network
->static_addresses
)
2899 if (address_equal(net_address
, address
))
2905 static bool link_is_static_route_configured(Link
*link
, Route
*route
) {
2914 LIST_FOREACH(routes
, net_route
, link
->network
->static_routes
)
2915 if (route_equal(net_route
, route
))
2921 static int link_drop_foreign_config(Link
*link
) {
2927 SET_FOREACH(address
, link
->addresses_foreign
, i
) {
2928 /* we consider IPv6LL addresses to be managed by the kernel */
2929 if (address
->family
== AF_INET6
&& in_addr_is_link_local(AF_INET6
, &address
->in_addr
) == 1)
2932 if (link_is_static_address_configured(link
, address
)) {
2933 r
= address_add(link
, address
->family
, &address
->in_addr
, address
->prefixlen
, NULL
);
2935 return log_link_error_errno(link
, r
, "Failed to add address: %m");
2937 r
= address_remove(address
, link
, NULL
);
2943 SET_FOREACH(route
, link
->routes_foreign
, i
) {
2944 /* do not touch routes managed by the kernel */
2945 if (route
->protocol
== RTPROT_KERNEL
)
2948 if (link_is_static_route_configured(link
, route
)) {
2949 r
= route_add(link
, route
->family
, &route
->dst
, route
->dst_prefixlen
, route
->tos
, route
->priority
, route
->table
, NULL
);
2953 r
= route_remove(route
, link
, NULL
);
2962 static int link_drop_config(Link
*link
) {
2963 Address
*address
, *pool_address
;
2968 SET_FOREACH(address
, link
->addresses
, i
) {
2969 /* we consider IPv6LL addresses to be managed by the kernel */
2970 if (address
->family
== AF_INET6
&& in_addr_is_link_local(AF_INET6
, &address
->in_addr
) == 1)
2973 r
= address_remove(address
, link
, NULL
);
2977 /* If this address came from an address pool, clean up the pool */
2978 LIST_FOREACH(addresses
, pool_address
, link
->pool_addresses
) {
2979 if (address_equal(address
, pool_address
)) {
2980 LIST_REMOVE(addresses
, link
->pool_addresses
, pool_address
);
2981 address_free(pool_address
);
2987 SET_FOREACH(route
, link
->routes
, i
) {
2988 /* do not touch routes managed by the kernel */
2989 if (route
->protocol
== RTPROT_KERNEL
)
2992 r
= route_remove(route
, link
, NULL
);
3002 static int link_update_lldp(Link
*link
) {
3010 if (link
->flags
& IFF_UP
) {
3011 r
= sd_lldp_start(link
->lldp
);
3013 log_link_debug(link
, "Started LLDP.");
3015 r
= sd_lldp_stop(link
->lldp
);
3017 log_link_debug(link
, "Stopped LLDP.");
3023 static int link_configure_can(Link
*link
) {
3026 if (streq_ptr(link
->kind
, "can")) {
3027 /* The CAN interface must be down to configure bitrate, etc... */
3028 if ((link
->flags
& IFF_UP
)) {
3029 r
= link_down(link
);
3031 link_enter_failed(link
);
3038 return link_set_can(link
);
3041 if (!(link
->flags
& IFF_UP
)) {
3042 r
= link_up_can(link
);
3044 link_enter_failed(link
);
3052 static int link_configure(Link
*link
) {
3056 assert(link
->network
);
3057 assert(link
->state
== LINK_STATE_PENDING
);
3059 if (STRPTR_IN_SET(link
->kind
, "can", "vcan"))
3060 return link_configure_can(link
);
3062 /* Drop foreign config, but ignore loopback or critical devices.
3063 * We do not want to remove loopback address or addresses used for root NFS. */
3064 if (!(link
->flags
& IFF_LOOPBACK
) && !(link
->network
->dhcp_critical
)) {
3065 r
= link_drop_foreign_config(link
);
3070 r
= link_set_proxy_arp(link
);
3074 r
= ipv6_proxy_ndp_addresses_configure(link
);
3078 r
= link_set_ipv4_forward(link
);
3082 r
= link_set_ipv6_forward(link
);
3086 r
= link_set_ipv6_privacy_extensions(link
);
3090 r
= link_set_ipv6_accept_ra(link
);
3094 r
= link_set_ipv6_dad_transmits(link
);
3098 r
= link_set_ipv6_hop_limit(link
);
3102 r
= link_set_flags(link
);
3106 r
= link_set_ipv6_mtu(link
);
3110 if (link_ipv4ll_enabled(link
)) {
3111 r
= ipv4ll_configure(link
);
3116 if (link_dhcp4_enabled(link
)) {
3117 r
= dhcp4_set_promote_secondaries(link
);
3121 r
= dhcp4_configure(link
);
3126 if (link_dhcp4_server_enabled(link
)) {
3127 r
= sd_dhcp_server_new(&link
->dhcp_server
, link
->ifindex
);
3131 r
= sd_dhcp_server_attach_event(link
->dhcp_server
, NULL
, 0);
3136 if (link_dhcp6_enabled(link
) ||
3137 link_ipv6_accept_ra_enabled(link
)) {
3138 r
= dhcp6_configure(link
);
3143 if (link_ipv6_accept_ra_enabled(link
)) {
3144 r
= ndisc_configure(link
);
3149 if (link_radv_enabled(link
)) {
3150 r
= radv_configure(link
);
3155 if (link_lldp_rx_enabled(link
)) {
3156 r
= sd_lldp_new(&link
->lldp
);
3160 r
= sd_lldp_set_ifindex(link
->lldp
, link
->ifindex
);
3164 r
= sd_lldp_match_capabilities(link
->lldp
,
3165 link
->network
->lldp_mode
== LLDP_MODE_ROUTERS_ONLY
?
3166 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS
:
3167 SD_LLDP_SYSTEM_CAPABILITIES_ALL
);
3171 r
= sd_lldp_set_filter_address(link
->lldp
, &link
->mac
);
3175 r
= sd_lldp_attach_event(link
->lldp
, NULL
, 0);
3179 r
= sd_lldp_set_callback(link
->lldp
, lldp_handler
, link
);
3183 r
= link_update_lldp(link
);
3188 r
= link_set_mtu(link
, link
->network
->mtu
, link
->network
->mtu_is_set
);
3192 if (socket_ipv6_is_supported()) {
3193 r
= link_configure_addrgen_mode(link
);
3198 return link_configure_after_setting_mtu(link
);
3201 static int link_configure_after_setting_mtu(Link
*link
) {
3205 assert(link
->network
);
3206 assert(link
->state
== LINK_STATE_PENDING
);
3208 if (link
->setting_mtu
)
3211 if (link_has_carrier(link
) || link
->network
->configure_without_carrier
) {
3212 r
= link_acquire_conf(link
);
3217 return link_enter_join_netdev(link
);
3220 static int duid_set_uuid(DUID
*duid
, sd_id128_t uuid
) {
3223 if (duid
->raw_data_len
> 0)
3226 if (duid
->type
!= DUID_TYPE_UUID
)
3229 memcpy(&duid
->raw_data
, &uuid
, sizeof(sd_id128_t
));
3230 duid
->raw_data_len
= sizeof(sd_id128_t
);
3235 int get_product_uuid_handler(sd_bus_message
*m
, void *userdata
, sd_bus_error
*ret_error
) {
3236 Manager
*manager
= userdata
;
3237 const sd_bus_error
*e
;
3247 e
= sd_bus_message_get_error(m
);
3249 log_error_errno(sd_bus_error_get_errno(e
),
3250 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
3255 r
= sd_bus_message_read_array(m
, 'y', &a
, &sz
);
3259 if (sz
!= sizeof(sd_id128_t
)) {
3260 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
3264 memcpy(&manager
->product_uuid
, a
, sz
);
3265 while ((duid
= set_steal_first(manager
->duids_requesting_uuid
)))
3266 (void) duid_set_uuid(duid
, manager
->product_uuid
);
3268 manager
->duids_requesting_uuid
= set_free(manager
->duids_requesting_uuid
);
3271 while ((link
= set_steal_first(manager
->links_requesting_uuid
))) {
3272 r
= link_configure(link
);
3274 log_link_error_errno(link
, r
, "Failed to configure link: %m");
3277 manager
->links_requesting_uuid
= set_free(manager
->links_requesting_uuid
);
3279 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
3280 * even if the method fails. */
3281 manager
->has_product_uuid
= true;
3286 static bool link_requires_uuid(Link
*link
) {
3290 assert(link
->manager
);
3291 assert(link
->network
);
3293 duid
= link_get_duid(link
);
3294 if (duid
->type
!= DUID_TYPE_UUID
|| duid
->raw_data_len
!= 0)
3297 if (link_dhcp4_enabled(link
) && IN_SET(link
->network
->dhcp_client_identifier
, DHCP_CLIENT_ID_DUID
, DHCP_CLIENT_ID_DUID_ONLY
))
3300 if (link_dhcp6_enabled(link
) || link_ipv6_accept_ra_enabled(link
))
3306 static int link_configure_duid(Link
*link
) {
3312 assert(link
->manager
);
3313 assert(link
->network
);
3316 duid
= link_get_duid(link
);
3318 if (!link_requires_uuid(link
))
3321 if (m
->has_product_uuid
) {
3322 (void) duid_set_uuid(duid
, m
->product_uuid
);
3326 if (!m
->links_requesting_uuid
) {
3327 r
= manager_request_product_uuid(m
, link
);
3332 log_link_warning_errno(link
, r
,
3333 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
3337 r
= set_put(m
->links_requesting_uuid
, link
);
3341 r
= set_put(m
->duids_requesting_uuid
, duid
);
3349 static int link_initialized_and_synced(Link
*link
) {
3354 assert(link
->ifname
);
3355 assert(link
->manager
);
3357 if (link
->state
!= LINK_STATE_PENDING
)
3360 log_link_debug(link
, "Link state is up-to-date");
3362 r
= link_new_bound_by_list(link
);
3366 r
= link_handle_bound_by_list(link
);
3370 if (!link
->network
) {
3371 r
= network_get(link
->manager
, link
->sd_device
, link
->ifname
,
3372 &link
->mac
, &network
);
3374 link_enter_unmanaged(link
);
3376 } else if (r
== 0 && network
->unmanaged
) {
3377 link_enter_unmanaged(link
);
3382 if (link
->flags
& IFF_LOOPBACK
) {
3383 if (network
->link_local
!= ADDRESS_FAMILY_NO
)
3384 log_link_debug(link
, "Ignoring link-local autoconfiguration for loopback link");
3386 if (network
->dhcp
!= ADDRESS_FAMILY_NO
)
3387 log_link_debug(link
, "Ignoring DHCP clients for loopback link");
3389 if (network
->dhcp_server
)
3390 log_link_debug(link
, "Ignoring DHCP server for loopback link");
3393 r
= network_apply(network
, link
);
3398 r
= link_new_bound_to_list(link
);
3402 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3403 * link_configure() is called later asynchronously. */
3404 r
= link_configure_duid(link
);
3408 r
= link_configure(link
);
3415 static int link_initialized_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
3416 (void) link_initialized_and_synced(link
);
3420 int link_initialized(Link
*link
, sd_device
*device
) {
3421 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
3425 assert(link
->manager
);
3426 assert(link
->manager
->rtnl
);
3429 if (link
->state
!= LINK_STATE_PENDING
)
3432 if (link
->sd_device
)
3435 log_link_debug(link
, "udev initialized link");
3437 link
->sd_device
= sd_device_ref(device
);
3439 /* udev has initialized the link, but we don't know if we have yet
3440 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3441 * when it returns we know that the pending NEWLINKs have already been
3442 * processed and that we are up-to-date */
3444 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_GETLINK
,
3449 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, link_initialized_handler
,
3450 link_netlink_destroy_callback
, link
);
3459 static int link_load(Link
*link
) {
3460 _cleanup_free_
char *network_file
= NULL
,
3463 *dhcp4_address
= NULL
,
3464 *ipv4ll_address
= NULL
;
3465 union in_addr_union address
;
3466 union in_addr_union route_dst
;
3472 r
= parse_env_file(NULL
, link
->state_file
,
3473 "NETWORK_FILE", &network_file
,
3474 "ADDRESSES", &addresses
,
3476 "DHCP4_ADDRESS", &dhcp4_address
,
3477 "IPV4LL_ADDRESS", &ipv4ll_address
);
3478 if (r
< 0 && r
!= -ENOENT
)
3479 return log_link_error_errno(link
, r
, "Failed to read %s: %m", link
->state_file
);
3486 suffix
= strrchr(network_file
, '.');
3488 log_link_debug(link
, "Failed to get network name from %s", network_file
);
3489 goto network_file_fail
;
3493 r
= network_get_by_name(link
->manager
, basename(network_file
), &network
);
3495 log_link_debug_errno(link
, r
, "Failed to get network %s: %m", basename(network_file
));
3496 goto network_file_fail
;
3499 r
= network_apply(network
, link
);
3501 return log_link_error_errno(link
, r
, "Failed to apply network %s: %m", basename(network_file
));
3510 _cleanup_free_
char *address_str
= NULL
;
3511 char *prefixlen_str
;
3513 unsigned char prefixlen
;
3515 r
= extract_first_word(&p
, &address_str
, NULL
, 0);
3517 log_link_debug_errno(link
, r
, "Failed to extract next address string: %m");
3523 prefixlen_str
= strchr(address_str
, '/');
3524 if (!prefixlen_str
) {
3525 log_link_debug(link
, "Failed to parse address and prefix length %s", address_str
);
3529 *prefixlen_str
++ = '\0';
3531 r
= sscanf(prefixlen_str
, "%hhu", &prefixlen
);
3533 log_link_error(link
, "Failed to parse prefixlen %s", prefixlen_str
);
3537 r
= in_addr_from_string_auto(address_str
, &family
, &address
);
3539 log_link_debug_errno(link
, r
, "Failed to parse address %s: %m", address_str
);
3543 r
= address_add(link
, family
, &address
, prefixlen
, NULL
);
3545 return log_link_error_errno(link
, r
, "Failed to add address: %m");
3554 _cleanup_free_
char *route_str
= NULL
;
3555 _cleanup_(sd_event_source_unrefp
) sd_event_source
*expire
= NULL
;
3557 char *prefixlen_str
;
3559 unsigned char prefixlen
, tos
, table
;
3562 r
= extract_first_word(&p
, &route_str
, NULL
, 0);
3564 log_link_debug_errno(link
, r
, "Failed to extract next route string: %m");
3570 prefixlen_str
= strchr(route_str
, '/');
3571 if (!prefixlen_str
) {
3572 log_link_debug(link
, "Failed to parse route %s", route_str
);
3576 *prefixlen_str
++ = '\0';
3578 r
= sscanf(prefixlen_str
, "%hhu/%hhu/%"SCNu32
"/%hhu/"USEC_FMT
, &prefixlen
, &tos
, &priority
, &table
, &lifetime
);
3580 log_link_debug(link
,
3581 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3586 r
= in_addr_from_string_auto(route_str
, &family
, &route_dst
);
3588 log_link_debug_errno(link
, r
, "Failed to parse route destination %s: %m", route_str
);
3592 r
= route_add(link
, family
, &route_dst
, prefixlen
, tos
, priority
, table
, &route
);
3594 return log_link_error_errno(link
, r
, "Failed to add route: %m");
3596 if (lifetime
!= USEC_INFINITY
&& !kernel_route_expiration_supported()) {
3597 r
= sd_event_add_time(link
->manager
->event
, &expire
, clock_boottime_or_monotonic(), lifetime
,
3598 0, route_expire_handler
, route
);
3600 log_link_warning_errno(link
, r
, "Could not arm route expiration handler: %m");
3603 route
->lifetime
= lifetime
;
3604 sd_event_source_unref(route
->expire
);
3605 route
->expire
= TAKE_PTR(expire
);
3609 if (dhcp4_address
) {
3610 r
= in_addr_from_string(AF_INET
, dhcp4_address
, &address
);
3612 log_link_debug_errno(link
, r
, "Failed to parse DHCPv4 address %s: %m", dhcp4_address
);
3613 goto dhcp4_address_fail
;
3616 r
= sd_dhcp_client_new(&link
->dhcp_client
, link
->network
? link
->network
->dhcp_anonymize
: 0);
3618 return log_link_error_errno(link
, r
, "Failed to create DHCPv4 client: %m");
3620 r
= sd_dhcp_client_set_request_address(link
->dhcp_client
, &address
.in
);
3622 return log_link_error_errno(link
, r
, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address
);
3627 if (ipv4ll_address
) {
3628 r
= in_addr_from_string(AF_INET
, ipv4ll_address
, &address
);
3630 log_link_debug_errno(link
, r
, "Failed to parse IPv4LL address %s: %m", ipv4ll_address
);
3631 goto ipv4ll_address_fail
;
3634 r
= sd_ipv4ll_new(&link
->ipv4ll
);
3636 return log_link_error_errno(link
, r
, "Failed to create IPv4LL client: %m");
3638 r
= sd_ipv4ll_set_address(link
->ipv4ll
, &address
.in
);
3640 return log_link_error_errno(link
, r
, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address
);
3643 ipv4ll_address_fail
:
3648 int link_add(Manager
*m
, sd_netlink_message
*message
, Link
**ret
) {
3649 _cleanup_(sd_device_unrefp
) sd_device
*device
= NULL
;
3650 char ifindex_str
[2 + DECIMAL_STR_MAX(int)];
3659 r
= link_new(m
, message
, ret
);
3665 log_link_debug(link
, "Link %d added", link
->ifindex
);
3667 r
= link_load(link
);
3671 if (detect_container() <= 0) {
3672 /* not in a container, udev will be around */
3673 sprintf(ifindex_str
, "n%d", link
->ifindex
);
3674 r
= sd_device_new_from_device_id(&device
, ifindex_str
);
3676 log_link_warning_errno(link
, r
, "Could not find device: %m");
3680 r
= sd_device_get_is_initialized(device
);
3682 log_link_warning_errno(link
, r
, "Could not determine whether the device is initialized or not: %m");
3687 log_link_debug(link
, "link pending udev initialization...");
3691 r
= device_is_renaming(device
);
3693 log_link_warning_errno(link
, r
, "Failed to determine the device is renamed or not: %m");
3697 log_link_debug(link
, "Interface is under renaming, pending initialization.");
3701 r
= link_initialized(link
, device
);
3705 r
= link_initialized_and_synced(link
);
3712 link_enter_failed(link
);
3716 int link_ipv6ll_gained(Link
*link
, const struct in6_addr
*address
) {
3721 log_link_info(link
, "Gained IPv6LL");
3723 link
->ipv6ll_address
= *address
;
3724 link_check_ready(link
);
3726 if (!IN_SET(link
->state
, LINK_STATE_PENDING
, LINK_STATE_UNMANAGED
, LINK_STATE_FAILED
)) {
3727 r
= link_acquire_ipv6_conf(link
);
3729 link_enter_failed(link
);
3737 static int link_carrier_gained(Link
*link
) {
3742 if (!IN_SET(link
->state
, LINK_STATE_PENDING
, LINK_STATE_UNMANAGED
, LINK_STATE_FAILED
)) {
3743 r
= link_acquire_conf(link
);
3745 link_enter_failed(link
);
3749 r
= link_request_set_addresses(link
);
3754 r
= link_handle_bound_by_list(link
);
3761 static int link_carrier_lost(Link
*link
) {
3766 if (link
->network
&& link
->network
->ignore_carrier_loss
)
3769 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
3770 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3771 * configuration and stop the clients as well. */
3772 if (link
->setting_mtu
)
3775 r
= link_stop_clients(link
);
3777 link_enter_failed(link
);
3781 if (link_dhcp4_server_enabled(link
))
3782 (void) sd_dhcp_server_stop(link
->dhcp_server
);
3784 r
= link_drop_config(link
);
3788 if (!IN_SET(link
->state
, LINK_STATE_UNMANAGED
, LINK_STATE_PENDING
)) {
3789 log_link_debug(link
, "State is %s, dropping config", link_state_to_string(link
->state
));
3790 r
= link_drop_foreign_config(link
);
3795 r
= link_handle_bound_by_list(link
);
3802 int link_carrier_reset(Link
*link
) {
3807 if (link_has_carrier(link
)) {
3808 r
= link_carrier_lost(link
);
3812 r
= link_carrier_gained(link
);
3816 log_link_info(link
, "Reset carrier");
3822 int link_update(Link
*link
, sd_netlink_message
*m
) {
3823 struct ether_addr mac
;
3826 bool had_carrier
, carrier_gained
, carrier_lost
;
3830 assert(link
->ifname
);
3833 if (link
->state
== LINK_STATE_LINGER
) {
3834 log_link_info(link
, "Link readded");
3835 link_set_state(link
, LINK_STATE_CONFIGURING
);
3837 r
= link_new_carrier_maps(link
);
3842 r
= sd_netlink_message_read_string(m
, IFLA_IFNAME
, &ifname
);
3843 if (r
>= 0 && !streq(ifname
, link
->ifname
)) {
3844 Manager
*manager
= link
->manager
;
3846 log_link_info(link
, "Interface name change detected, %s has been renamed to %s.", link
->ifname
, ifname
);
3849 r
= link_add(manager
, m
, &link
);
3854 r
= sd_netlink_message_read_u32(m
, IFLA_MTU
, &mtu
);
3855 if (r
>= 0 && mtu
> 0) {
3857 if (link
->original_mtu
== 0) {
3858 link
->original_mtu
= mtu
;
3859 log_link_debug(link
, "Saved original MTU: %" PRIu32
, link
->original_mtu
);
3862 if (link
->dhcp_client
) {
3863 r
= sd_dhcp_client_set_mtu(link
->dhcp_client
,
3866 return log_link_warning_errno(link
, r
, "Could not update MTU in DHCP client: %m");
3870 r
= sd_radv_set_mtu(link
->radv
, link
->mtu
);
3872 return log_link_warning_errno(link
, r
, "Could not set MTU for Router Advertisement: %m");
3876 /* The kernel may broadcast NEWLINK messages without the MAC address
3877 set, simply ignore them. */
3878 r
= sd_netlink_message_read_ether_addr(m
, IFLA_ADDRESS
, &mac
);
3880 if (memcmp(link
->mac
.ether_addr_octet
, mac
.ether_addr_octet
,
3883 memcpy(link
->mac
.ether_addr_octet
, mac
.ether_addr_octet
,
3886 log_link_debug(link
, "MAC address: "
3887 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3888 mac
.ether_addr_octet
[0],
3889 mac
.ether_addr_octet
[1],
3890 mac
.ether_addr_octet
[2],
3891 mac
.ether_addr_octet
[3],
3892 mac
.ether_addr_octet
[4],
3893 mac
.ether_addr_octet
[5]);
3896 r
= sd_ipv4ll_set_mac(link
->ipv4ll
, &link
->mac
);
3898 return log_link_warning_errno(link
, r
, "Could not update MAC address in IPv4LL client: %m");
3901 if (link
->dhcp_client
) {
3902 r
= sd_dhcp_client_set_mac(link
->dhcp_client
,
3903 (const uint8_t *) &link
->mac
,
3907 return log_link_warning_errno(link
, r
, "Could not update MAC address in DHCP client: %m");
3909 r
= dhcp4_set_client_identifier(link
);
3914 if (link
->dhcp6_client
) {
3915 const DUID
* duid
= link_get_duid(link
);
3917 r
= sd_dhcp6_client_set_mac(link
->dhcp6_client
,
3918 (const uint8_t *) &link
->mac
,
3922 return log_link_warning_errno(link
, r
, "Could not update MAC address in DHCPv6 client: %m");
3924 if (link
->network
->iaid_set
) {
3925 r
= sd_dhcp6_client_set_iaid(link
->dhcp6_client
,
3926 link
->network
->iaid
);
3928 return log_link_warning_errno(link
, r
, "Could not update DHCPv6 IAID: %m");
3931 r
= sd_dhcp6_client_set_duid(link
->dhcp6_client
,
3933 duid
->raw_data_len
> 0 ? duid
->raw_data
: NULL
,
3934 duid
->raw_data_len
);
3936 return log_link_warning_errno(link
, r
, "Could not update DHCPv6 DUID: %m");
3940 r
= sd_radv_set_mac(link
->radv
, &link
->mac
);
3942 return log_link_warning_errno(link
, r
, "Could not update MAC for Router Advertisement: %m");
3946 r
= sd_ndisc_set_mac(link
->ndisc
, &link
->mac
);
3948 return log_link_warning_errno(link
, r
, "Could not update MAC for ndisc: %m");
3953 had_carrier
= link_has_carrier(link
);
3955 r
= link_update_flags(link
, m
);
3959 r
= link_update_lldp(link
);
3963 carrier_gained
= !had_carrier
&& link_has_carrier(link
);
3964 carrier_lost
= had_carrier
&& !link_has_carrier(link
);
3966 if (carrier_gained
) {
3967 log_link_info(link
, "Gained carrier");
3969 r
= link_carrier_gained(link
);
3972 } else if (carrier_lost
) {
3973 log_link_info(link
, "Lost carrier");
3975 r
= link_carrier_lost(link
);
3983 static void print_link_hashmap(FILE *f
, const char *prefix
, Hashmap
* h
) {
3991 if (hashmap_isempty(h
))
3995 HASHMAP_FOREACH(link
, h
, i
) {
3999 fprintf(f
, "%i", link
->ifindex
);
4006 int link_save(Link
*link
) {
4007 _cleanup_free_
char *temp_path
= NULL
;
4008 _cleanup_fclose_
FILE *f
= NULL
;
4009 const char *admin_state
, *oper_state
;
4016 assert(link
->state_file
);
4017 assert(link
->lease_file
);
4018 assert(link
->manager
);
4020 if (link
->state
== LINK_STATE_LINGER
) {
4021 unlink(link
->state_file
);
4025 link_lldp_save(link
);
4027 admin_state
= link_state_to_string(link
->state
);
4028 assert(admin_state
);
4030 oper_state
= link_operstate_to_string(link
->operstate
);
4033 r
= fopen_temporary(link
->state_file
, &f
, &temp_path
);
4037 (void) __fsetlocking(f
, FSETLOCKING_BYCALLER
);
4038 (void) fchmod(fileno(f
), 0644);
4041 "# This is private data. Do not parse.\n"
4044 admin_state
, oper_state
);
4046 if (link
->network
) {
4048 sd_dhcp6_lease
*dhcp6_lease
= NULL
;
4049 const char *dhcp_domainname
= NULL
;
4050 char **dhcp6_domains
= NULL
;
4051 char **dhcp_domains
= NULL
;
4054 fprintf(f
, "REQUIRED_FOR_ONLINE=%s\n",
4055 yes_no(link
->network
->required_for_online
));
4057 fprintf(f
, "REQUIRED_OPER_STATE_FOR_ONLINE=%s\n",
4058 strempty(link_operstate_to_string(link
->network
->required_operstate_for_online
)));
4060 if (link
->dhcp6_client
) {
4061 r
= sd_dhcp6_client_get_lease(link
->dhcp6_client
, &dhcp6_lease
);
4062 if (r
< 0 && r
!= -ENOMSG
)
4063 log_link_debug(link
, "No DHCPv6 lease");
4066 fprintf(f
, "NETWORK_FILE=%s\n", link
->network
->filename
);
4071 for (j
= 0; j
< link
->network
->n_dns
; j
++) {
4072 _cleanup_free_
char *b
= NULL
;
4074 r
= in_addr_to_string(link
->network
->dns
[j
].family
,
4075 &link
->network
->dns
[j
].address
, &b
);
4077 log_debug_errno(r
, "Failed to format address, ignoring: %m");
4087 if (link
->network
->dhcp_use_dns
&&
4089 const struct in_addr
*addresses
;
4091 r
= sd_dhcp_lease_get_dns(link
->dhcp_lease
, &addresses
);
4093 if (serialize_in_addrs(f
, addresses
, r
, space
, in4_addr_is_non_local
) > 0)
4097 if (link
->network
->dhcp_use_dns
&& dhcp6_lease
) {
4098 struct in6_addr
*in6_addrs
;
4100 r
= sd_dhcp6_lease_get_dns(dhcp6_lease
, &in6_addrs
);
4104 serialize_in6_addrs(f
, in6_addrs
, r
);
4109 /* Make sure to flush out old entries before we use the NDISC data */
4112 if (link
->network
->ipv6_accept_ra_use_dns
&& link
->ndisc_rdnss
) {
4115 SET_FOREACH(dd
, link
->ndisc_rdnss
, i
) {
4119 serialize_in6_addrs(f
, &dd
->address
, 1);
4128 fputstrv(f
, link
->network
->ntp
, NULL
, &space
);
4130 if (link
->network
->dhcp_use_ntp
&&
4132 const struct in_addr
*addresses
;
4134 r
= sd_dhcp_lease_get_ntp(link
->dhcp_lease
, &addresses
);
4136 if (serialize_in_addrs(f
, addresses
, r
, space
, in4_addr_is_non_local
) > 0)
4140 if (link
->network
->dhcp_use_ntp
&& dhcp6_lease
) {
4141 struct in6_addr
*in6_addrs
;
4144 r
= sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease
,
4149 serialize_in6_addrs(f
, in6_addrs
, r
);
4153 r
= sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease
, &hosts
);
4155 fputstrv(f
, hosts
, NULL
, &space
);
4160 if (link
->network
->dhcp_use_domains
!= DHCP_USE_DOMAINS_NO
) {
4161 if (link
->dhcp_lease
) {
4162 (void) sd_dhcp_lease_get_domainname(link
->dhcp_lease
, &dhcp_domainname
);
4163 (void) sd_dhcp_lease_get_search_domains(link
->dhcp_lease
, &dhcp_domains
);
4166 (void) sd_dhcp6_lease_get_domains(dhcp6_lease
, &dhcp6_domains
);
4169 ordered_set_print(f
, "DOMAINS=", link
->network
->search_domains
);
4171 if (link
->network
->dhcp_use_domains
== DHCP_USE_DOMAINS_YES
) {
4174 if (dhcp_domainname
)
4175 fputs_with_space(f
, dhcp_domainname
, NULL
, &space
);
4177 fputstrv(f
, dhcp_domains
, NULL
, &space
);
4179 fputstrv(f
, dhcp6_domains
, NULL
, &space
);
4181 SET_FOREACH(dd
, link
->ndisc_dnssl
, i
)
4182 fputs_with_space(f
, NDISC_DNSSL_DOMAIN(dd
), NULL
, &space
);
4187 ordered_set_print(f
, "ROUTE_DOMAINS=", link
->network
->route_domains
);
4189 if (link
->network
->dhcp_use_domains
== DHCP_USE_DOMAINS_ROUTE
) {
4192 if (dhcp_domainname
)
4193 fputs_with_space(f
, dhcp_domainname
, NULL
, &space
);
4195 fputstrv(f
, dhcp_domains
, NULL
, &space
);
4197 fputstrv(f
, dhcp6_domains
, NULL
, &space
);
4199 SET_FOREACH(dd
, link
->ndisc_dnssl
, i
)
4200 fputs_with_space(f
, NDISC_DNSSL_DOMAIN(dd
), NULL
, &space
);
4205 fprintf(f
, "LLMNR=%s\n",
4206 resolve_support_to_string(link
->network
->llmnr
));
4207 fprintf(f
, "MDNS=%s\n",
4208 resolve_support_to_string(link
->network
->mdns
));
4209 if (link
->network
->dns_default_route
>= 0)
4210 fprintf(f
, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link
->network
->dns_default_route
));
4212 if (link
->network
->dns_over_tls_mode
!= _DNS_OVER_TLS_MODE_INVALID
)
4213 fprintf(f
, "DNS_OVER_TLS=%s\n",
4214 dns_over_tls_mode_to_string(link
->network
->dns_over_tls_mode
));
4216 if (link
->network
->dnssec_mode
!= _DNSSEC_MODE_INVALID
)
4217 fprintf(f
, "DNSSEC=%s\n",
4218 dnssec_mode_to_string(link
->network
->dnssec_mode
));
4220 if (!set_isempty(link
->network
->dnssec_negative_trust_anchors
)) {
4223 fputs("DNSSEC_NTA=", f
);
4225 SET_FOREACH(n
, link
->network
->dnssec_negative_trust_anchors
, i
)
4226 fputs_with_space(f
, n
, NULL
, &space
);
4230 fputs("ADDRESSES=", f
);
4232 SET_FOREACH(a
, link
->addresses
, i
) {
4233 _cleanup_free_
char *address_str
= NULL
;
4235 r
= in_addr_to_string(a
->family
, &a
->in_addr
, &address_str
);
4239 fprintf(f
, "%s%s/%u", space
? " " : "", address_str
, a
->prefixlen
);
4244 fputs("ROUTES=", f
);
4246 SET_FOREACH(route
, link
->routes
, i
) {
4247 _cleanup_free_
char *route_str
= NULL
;
4249 r
= in_addr_to_string(route
->family
, &route
->dst
, &route_str
);
4253 fprintf(f
, "%s%s/%hhu/%hhu/%"PRIu32
"/%"PRIu32
"/"USEC_FMT
,
4254 space
? " " : "", route_str
,
4255 route
->dst_prefixlen
, route
->tos
, route
->priority
, route
->table
, route
->lifetime
);
4262 print_link_hashmap(f
, "CARRIER_BOUND_TO=", link
->bound_to_links
);
4263 print_link_hashmap(f
, "CARRIER_BOUND_BY=", link
->bound_by_links
);
4265 if (link
->dhcp_lease
) {
4266 struct in_addr address
;
4267 const char *tz
= NULL
;
4269 assert(link
->network
);
4271 r
= sd_dhcp_lease_get_timezone(link
->dhcp_lease
, &tz
);
4273 fprintf(f
, "TIMEZONE=%s\n", tz
);
4275 r
= sd_dhcp_lease_get_address(link
->dhcp_lease
, &address
);
4277 fputs("DHCP4_ADDRESS=", f
);
4278 serialize_in_addrs(f
, &address
, 1, false, NULL
);
4282 r
= dhcp_lease_save(link
->dhcp_lease
, link
->lease_file
);
4290 unlink(link
->lease_file
);
4293 struct in_addr address
;
4295 r
= sd_ipv4ll_get_address(link
->ipv4ll
, &address
);
4297 fputs("IPV4LL_ADDRESS=", f
);
4298 serialize_in_addrs(f
, &address
, 1, false, NULL
);
4303 r
= fflush_and_check(f
);
4307 if (rename(temp_path
, link
->state_file
) < 0) {
4315 (void) unlink(link
->state_file
);
4317 (void) unlink(temp_path
);
4319 return log_link_error_errno(link
, r
, "Failed to save link data to %s: %m", link
->state_file
);
4322 /* The serialized state in /run is no longer up-to-date. */
4323 void link_dirty(Link
*link
) {
4328 /* mark manager dirty as link is dirty */
4329 manager_dirty(link
->manager
);
4331 r
= set_ensure_allocated(&link
->manager
->dirty_links
, NULL
);
4333 /* allocation errors are ignored */
4336 r
= set_put(link
->manager
->dirty_links
, link
);
4338 /* don't take another ref if the link was already dirty */
4344 /* The serialized state in /run is up-to-date */
4345 void link_clean(Link
*link
) {
4347 assert(link
->manager
);
4349 link_unref(set_remove(link
->manager
->dirty_links
, link
));
4352 static const char* const link_state_table
[_LINK_STATE_MAX
] = {
4353 [LINK_STATE_PENDING
] = "pending",
4354 [LINK_STATE_CONFIGURING
] = "configuring",
4355 [LINK_STATE_CONFIGURED
] = "configured",
4356 [LINK_STATE_UNMANAGED
] = "unmanaged",
4357 [LINK_STATE_FAILED
] = "failed",
4358 [LINK_STATE_LINGER
] = "linger",
4361 DEFINE_STRING_TABLE_LOOKUP(link_state
, LinkState
);