1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 #include <netinet/in.h>
5 #include <linux/if_arp.h>
8 #include "alloc-util.h"
12 #include "dhcp-identifier.h"
13 #include "dhcp-lease-internal.h"
15 #include "ethtool-util.h"
19 #include "missing_network.h"
20 #include "netlink-util.h"
21 #include "network-internal.h"
22 #include "networkd-can.h"
23 #include "networkd-dhcp-server.h"
24 #include "networkd-dhcp4.h"
25 #include "networkd-dhcp6.h"
26 #include "networkd-ipv4ll.h"
27 #include "networkd-ipv6-proxy-ndp.h"
28 #include "networkd-link-bus.h"
29 #include "networkd-link.h"
30 #include "networkd-lldp-tx.h"
31 #include "networkd-manager.h"
32 #include "networkd-ndisc.h"
33 #include "networkd-neighbor.h"
34 #include "networkd-radv.h"
35 #include "networkd-routing-policy-rule.h"
36 #include "networkd-wifi.h"
38 #include "socket-util.h"
39 #include "stat-util.h"
40 #include "stdio-util.h"
41 #include "string-table.h"
43 #include "sysctl-util.h"
45 #include "tmpfile-util.h"
46 #include "udev-util.h"
50 uint32_t link_get_vrf_table(Link
*link
) {
51 return link
->network
->vrf
? VRF(link
->network
->vrf
)->table
: RT_TABLE_MAIN
;
54 uint32_t link_get_dhcp_route_table(Link
*link
) {
55 /* When the interface is part of an VRF use the VRFs routing table, unless
56 * another table is explicitly specified. */
57 if (link
->network
->dhcp_route_table_set
)
58 return link
->network
->dhcp_route_table
;
59 return link_get_vrf_table(link
);
62 uint32_t link_get_ipv6_accept_ra_route_table(Link
*link
) {
63 if (link
->network
->ipv6_accept_ra_route_table_set
)
64 return link
->network
->ipv6_accept_ra_route_table
;
65 return link_get_vrf_table(link
);
68 DUID
* link_get_duid(Link
*link
) {
69 if (link
->network
->duid
.type
!= _DUID_TYPE_INVALID
)
70 return &link
->network
->duid
;
72 return &link
->manager
->duid
;
75 static bool link_dhcp6_enabled(Link
*link
) {
78 if (!socket_ipv6_is_supported())
81 if (link
->flags
& IFF_LOOPBACK
)
87 if (link
->network
->bond
)
90 if (link
->iftype
== ARPHRD_CAN
)
93 return link
->network
->dhcp
& ADDRESS_FAMILY_IPV6
;
96 static bool link_dhcp4_enabled(Link
*link
) {
99 if (link
->flags
& IFF_LOOPBACK
)
105 if (link
->network
->bond
)
108 if (link
->iftype
== ARPHRD_CAN
)
111 return link
->network
->dhcp
& ADDRESS_FAMILY_IPV4
;
114 static bool link_dhcp4_server_enabled(Link
*link
) {
117 if (link
->flags
& IFF_LOOPBACK
)
123 if (link
->network
->bond
)
126 if (link
->iftype
== ARPHRD_CAN
)
129 return link
->network
->dhcp_server
;
132 bool link_ipv4ll_enabled(Link
*link
, AddressFamily mask
) {
134 assert((mask
& ~(ADDRESS_FAMILY_IPV4
| ADDRESS_FAMILY_FALLBACK_IPV4
)) == 0);
136 if (link
->flags
& IFF_LOOPBACK
)
142 if (link
->iftype
== ARPHRD_CAN
)
145 if (STRPTR_IN_SET(link
->kind
,
146 "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
147 "vti6", "nlmon", "xfrm"))
150 /* L3 or L3S mode do not support ARP. */
151 if (IN_SET(link_get_ipvlan_mode(link
), NETDEV_IPVLAN_MODE_L3
, NETDEV_IPVLAN_MODE_L3S
))
154 if (link
->network
->bond
)
157 return link
->network
->link_local
& mask
;
160 static bool link_ipv6ll_enabled(Link
*link
) {
163 if (!socket_ipv6_is_supported())
166 if (link
->flags
& IFF_LOOPBACK
)
172 if (link
->iftype
== ARPHRD_CAN
)
175 if (STRPTR_IN_SET(link
->kind
, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon"))
178 if (link
->network
->bond
)
181 return link
->network
->link_local
& ADDRESS_FAMILY_IPV6
;
184 static bool link_ipv6_enabled(Link
*link
) {
187 if (!socket_ipv6_is_supported())
190 if (link
->network
->bond
)
193 if (link
->iftype
== ARPHRD_CAN
)
196 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
197 if (link_ipv6ll_enabled(link
))
200 if (network_has_static_ipv6_configurations(link
->network
))
206 static bool link_radv_enabled(Link
*link
) {
209 if (!link_ipv6ll_enabled(link
))
212 return link
->network
->router_prefix_delegation
!= RADV_PREFIX_DELEGATION_NONE
;
215 static bool link_ipv4_forward_enabled(Link
*link
) {
218 if (link
->flags
& IFF_LOOPBACK
)
224 if (link
->network
->ip_forward
== _ADDRESS_FAMILY_INVALID
)
227 return link
->network
->ip_forward
& ADDRESS_FAMILY_IPV4
;
230 static bool link_ipv6_forward_enabled(Link
*link
) {
233 if (!socket_ipv6_is_supported())
236 if (link
->flags
& IFF_LOOPBACK
)
242 if (link
->network
->ip_forward
== _ADDRESS_FAMILY_INVALID
)
245 return link
->network
->ip_forward
& ADDRESS_FAMILY_IPV6
;
248 static bool link_proxy_arp_enabled(Link
*link
) {
251 if (link
->flags
& IFF_LOOPBACK
)
257 if (link
->network
->proxy_arp
< 0)
263 static bool link_ipv6_accept_ra_enabled(Link
*link
) {
266 if (!socket_ipv6_is_supported())
269 if (link
->flags
& IFF_LOOPBACK
)
275 if (!link_ipv6ll_enabled(link
))
278 /* If unset use system default (enabled if local forwarding is disabled.
279 * disabled if local forwarding is enabled).
280 * If set, ignore or enforce RA independent of local forwarding state.
282 if (link
->network
->ipv6_accept_ra
< 0)
283 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
284 return !link_ipv6_forward_enabled(link
);
285 else if (link
->network
->ipv6_accept_ra
> 0)
286 /* accept RA even if ip_forward is enabled */
293 static IPv6PrivacyExtensions
link_ipv6_privacy_extensions(Link
*link
) {
296 if (!socket_ipv6_is_supported())
297 return _IPV6_PRIVACY_EXTENSIONS_INVALID
;
299 if (link
->flags
& IFF_LOOPBACK
)
300 return _IPV6_PRIVACY_EXTENSIONS_INVALID
;
303 return _IPV6_PRIVACY_EXTENSIONS_INVALID
;
305 return link
->network
->ipv6_privacy_extensions
;
308 static int link_update_ipv6_sysctl(Link
*link
) {
312 if (link
->flags
& IFF_LOOPBACK
)
315 enabled
= link_ipv6_enabled(link
);
317 r
= sysctl_write_ip_property_boolean(AF_INET6
, link
->ifname
, "disable_ipv6", false);
319 return log_link_warning_errno(link
, r
, "Cannot enable IPv6: %m");
321 log_link_info(link
, "IPv6 successfully enabled");
327 static bool link_is_enslaved(Link
*link
) {
328 if (link
->flags
& IFF_SLAVE
)
329 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
335 if (link
->master_ifindex
> 0 && link
->network
->bridge
)
338 /* TODO: add conditions for other netdevs. */
343 static void link_update_master_operstate(Link
*link
, NetDev
*netdev
) {
349 if (link_get(link
->manager
, netdev
->ifindex
, &master
) < 0)
352 link_update_operstate(master
, true);
355 void link_update_operstate(Link
*link
, bool also_update_master
) {
356 LinkOperationalState operstate
;
357 LinkCarrierState carrier_state
;
358 LinkAddressState address_state
;
359 _cleanup_strv_free_
char **p
= NULL
;
360 uint8_t scope
= RT_SCOPE_NOWHERE
;
361 bool changed
= false;
367 if (link
->kernel_operstate
== IF_OPER_DORMANT
)
368 carrier_state
= LINK_CARRIER_STATE_DORMANT
;
369 else if (link_has_carrier(link
)) {
370 if (link_is_enslaved(link
))
371 carrier_state
= LINK_CARRIER_STATE_ENSLAVED
;
373 carrier_state
= LINK_CARRIER_STATE_CARRIER
;
374 } else if (link
->flags
& IFF_UP
)
375 carrier_state
= LINK_CARRIER_STATE_NO_CARRIER
;
377 carrier_state
= LINK_CARRIER_STATE_OFF
;
379 if (carrier_state
>= LINK_CARRIER_STATE_CARRIER
) {
382 SET_FOREACH(slave
, link
->slaves
, i
) {
383 link_update_operstate(slave
, false);
385 if (slave
->carrier_state
< LINK_CARRIER_STATE_CARRIER
)
386 carrier_state
= LINK_CARRIER_STATE_DEGRADED_CARRIER
;
390 SET_FOREACH(address
, link
->addresses
, i
) {
391 if (!address_is_ready(address
))
394 if (address
->scope
< scope
)
395 scope
= address
->scope
;
398 /* for operstate we also take foreign addresses into account */
399 SET_FOREACH(address
, link
->addresses_foreign
, i
) {
400 if (!address_is_ready(address
))
403 if (address
->scope
< scope
)
404 scope
= address
->scope
;
407 if (scope
< RT_SCOPE_SITE
)
408 /* universally accessible addresses found */
409 address_state
= LINK_ADDRESS_STATE_ROUTABLE
;
410 else if (scope
< RT_SCOPE_HOST
)
411 /* only link or site local addresses found */
412 address_state
= LINK_ADDRESS_STATE_DEGRADED
;
414 /* no useful addresses found */
415 address_state
= LINK_ADDRESS_STATE_OFF
;
417 /* Mapping of address and carrier state vs operational state
419 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
420 * ------------------------------------------------------------------------------
421 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
422 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
423 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
426 if (carrier_state
< LINK_CARRIER_STATE_CARRIER
|| address_state
== LINK_ADDRESS_STATE_OFF
)
427 operstate
= (LinkOperationalState
) carrier_state
;
428 else if (address_state
== LINK_ADDRESS_STATE_ROUTABLE
)
429 operstate
= LINK_OPERSTATE_ROUTABLE
;
430 else if (carrier_state
== LINK_CARRIER_STATE_CARRIER
)
431 operstate
= LINK_OPERSTATE_DEGRADED
;
433 operstate
= LINK_OPERSTATE_ENSLAVED
;
435 if (link
->carrier_state
!= carrier_state
) {
436 link
->carrier_state
= carrier_state
;
438 if (strv_extend(&p
, "CarrierState") < 0)
442 if (link
->address_state
!= address_state
) {
443 link
->address_state
= address_state
;
445 if (strv_extend(&p
, "AddressState") < 0)
449 if (link
->operstate
!= operstate
) {
450 link
->operstate
= operstate
;
452 if (strv_extend(&p
, "OperationalState") < 0)
457 link_send_changed_strv(link
, p
);
461 if (also_update_master
&& link
->network
) {
462 link_update_master_operstate(link
, link
->network
->bond
);
463 link_update_master_operstate(link
, link
->network
->bridge
);
467 #define FLAG_STRING(string, flag, old, new) \
468 (((old ^ new) & flag) \
469 ? ((old & flag) ? (" -" string) : (" +" string)) \
472 static int link_update_flags(Link
*link
, sd_netlink_message
*m
, bool force_update_operstate
) {
473 unsigned flags
, unknown_flags_added
, unknown_flags_removed
, unknown_flags
;
479 r
= sd_rtnl_message_link_get_flags(m
, &flags
);
481 return log_link_warning_errno(link
, r
, "Could not get link flags: %m");
483 r
= sd_netlink_message_read_u8(m
, IFLA_OPERSTATE
, &operstate
);
485 /* if we got a message without operstate, take it to mean
486 the state was unchanged */
487 operstate
= link
->kernel_operstate
;
489 if (!force_update_operstate
&& (link
->flags
== flags
) && (link
->kernel_operstate
== operstate
))
492 if (link
->flags
!= flags
) {
493 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",
494 FLAG_STRING("LOOPBACK", IFF_LOOPBACK
, link
->flags
, flags
),
495 FLAG_STRING("MASTER", IFF_MASTER
, link
->flags
, flags
),
496 FLAG_STRING("SLAVE", IFF_SLAVE
, link
->flags
, flags
),
497 FLAG_STRING("UP", IFF_UP
, link
->flags
, flags
),
498 FLAG_STRING("DORMANT", IFF_DORMANT
, link
->flags
, flags
),
499 FLAG_STRING("LOWER_UP", IFF_LOWER_UP
, link
->flags
, flags
),
500 FLAG_STRING("RUNNING", IFF_RUNNING
, link
->flags
, flags
),
501 FLAG_STRING("MULTICAST", IFF_MULTICAST
, link
->flags
, flags
),
502 FLAG_STRING("BROADCAST", IFF_BROADCAST
, link
->flags
, flags
),
503 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT
, link
->flags
, flags
),
504 FLAG_STRING("PROMISC", IFF_PROMISC
, link
->flags
, flags
),
505 FLAG_STRING("ALLMULTI", IFF_ALLMULTI
, link
->flags
, flags
),
506 FLAG_STRING("PORTSEL", IFF_PORTSEL
, link
->flags
, flags
),
507 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA
, link
->flags
, flags
),
508 FLAG_STRING("DYNAMIC", IFF_DYNAMIC
, link
->flags
, flags
),
509 FLAG_STRING("NOARP", IFF_NOARP
, link
->flags
, flags
),
510 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS
, link
->flags
, flags
),
511 FLAG_STRING("DEBUG", IFF_DEBUG
, link
->flags
, flags
),
512 FLAG_STRING("ECHO", IFF_ECHO
, link
->flags
, flags
));
514 unknown_flags
= ~(IFF_LOOPBACK
| IFF_MASTER
| IFF_SLAVE
| IFF_UP
|
515 IFF_DORMANT
| IFF_LOWER_UP
| IFF_RUNNING
|
516 IFF_MULTICAST
| IFF_BROADCAST
| IFF_POINTOPOINT
|
517 IFF_PROMISC
| IFF_ALLMULTI
| IFF_PORTSEL
|
518 IFF_AUTOMEDIA
| IFF_DYNAMIC
| IFF_NOARP
|
519 IFF_NOTRAILERS
| IFF_DEBUG
| IFF_ECHO
);
520 unknown_flags_added
= ((link
->flags
^ flags
) & flags
& unknown_flags
);
521 unknown_flags_removed
= ((link
->flags
^ flags
) & link
->flags
& unknown_flags
);
523 /* link flags are currently at most 18 bits, let's align to
525 if (unknown_flags_added
)
527 "Unknown link flags gained: %#.5x (ignoring)",
528 unknown_flags_added
);
530 if (unknown_flags_removed
)
532 "Unknown link flags lost: %#.5x (ignoring)",
533 unknown_flags_removed
);
537 link
->kernel_operstate
= operstate
;
539 link_update_operstate(link
, true);
544 static int link_new(Manager
*manager
, sd_netlink_message
*message
, Link
**ret
) {
545 _cleanup_(link_unrefp
) Link
*link
= NULL
;
546 const char *ifname
, *kind
= NULL
;
547 unsigned short iftype
;
555 /* check for link kind */
556 r
= sd_netlink_message_enter_container(message
, IFLA_LINKINFO
);
558 (void) sd_netlink_message_read_string(message
, IFLA_INFO_KIND
, &kind
);
559 r
= sd_netlink_message_exit_container(message
);
564 r
= sd_netlink_message_get_type(message
, &type
);
567 else if (type
!= RTM_NEWLINK
)
570 r
= sd_rtnl_message_link_get_ifindex(message
, &ifindex
);
573 else if (ifindex
<= 0)
576 r
= sd_rtnl_message_link_get_type(message
, &iftype
);
580 r
= sd_netlink_message_read_string(message
, IFLA_IFNAME
, &ifname
);
591 .state
= LINK_STATE_PENDING
,
595 .n_dns
= (unsigned) -1,
596 .dns_default_route
= -1,
597 .llmnr
= _RESOLVE_SUPPORT_INVALID
,
598 .mdns
= _RESOLVE_SUPPORT_INVALID
,
599 .dnssec_mode
= _DNSSEC_MODE_INVALID
,
600 .dns_over_tls_mode
= _DNS_OVER_TLS_MODE_INVALID
,
603 link
->ifname
= strdup(ifname
);
608 link
->kind
= strdup(kind
);
613 r
= sd_netlink_message_read_u32(message
, IFLA_MASTER
, (uint32_t *)&link
->master_ifindex
);
615 log_link_debug_errno(link
, r
, "New device has no master, continuing without");
617 r
= sd_netlink_message_read_ether_addr(message
, IFLA_ADDRESS
, &link
->mac
);
619 log_link_debug_errno(link
, r
, "MAC address not found for new device, continuing without");
621 r
= ethtool_get_permanent_macaddr(&manager
->ethtool_fd
, link
->ifname
, &link
->permanent_mac
);
623 log_link_debug_errno(link
, r
, "Permanent MAC address not found for new device, continuing without: %m");
625 r
= ethtool_get_driver(&manager
->ethtool_fd
, link
->ifname
, &link
->driver
);
627 log_link_debug_errno(link
, r
, "Failed to get driver, continuing without: %m");
629 r
= sd_netlink_message_read_strv(message
, IFLA_PROP_LIST
, IFLA_ALT_IFNAME
, &link
->alternative_names
);
630 if (r
< 0 && r
!= -ENODATA
)
633 if (asprintf(&link
->state_file
, "/run/systemd/netif/links/%d", link
->ifindex
) < 0)
636 if (asprintf(&link
->lease_file
, "/run/systemd/netif/leases/%d", link
->ifindex
) < 0)
639 if (asprintf(&link
->lldp_file
, "/run/systemd/netif/lldp/%d", link
->ifindex
) < 0)
642 r
= hashmap_ensure_allocated(&manager
->links
, NULL
);
646 r
= hashmap_put(manager
->links
, INT_TO_PTR(link
->ifindex
), link
);
650 r
= link_update_flags(link
, message
, false);
654 *ret
= TAKE_PTR(link
);
659 void link_ntp_settings_clear(Link
*link
) {
660 link
->ntp
= strv_free(link
->ntp
);
663 void link_dns_settings_clear(Link
*link
) {
664 link
->dns
= mfree(link
->dns
);
665 link
->n_dns
= (unsigned) -1;
667 link
->search_domains
= ordered_set_free_free(link
->search_domains
);
668 link
->route_domains
= ordered_set_free_free(link
->route_domains
);
670 link
->dns_default_route
= -1;
671 link
->llmnr
= _RESOLVE_SUPPORT_INVALID
;
672 link
->mdns
= _RESOLVE_SUPPORT_INVALID
;
673 link
->dnssec_mode
= _DNSSEC_MODE_INVALID
;
674 link
->dns_over_tls_mode
= _DNS_OVER_TLS_MODE_INVALID
;
676 link
->dnssec_negative_trust_anchors
= set_free_free(link
->dnssec_negative_trust_anchors
);
679 static void link_free_engines(Link
*link
) {
683 link
->dhcp_server
= sd_dhcp_server_unref(link
->dhcp_server
);
684 link
->dhcp_client
= sd_dhcp_client_unref(link
->dhcp_client
);
685 link
->dhcp_lease
= sd_dhcp_lease_unref(link
->dhcp_lease
);
686 link
->dhcp_routes
= set_free(link
->dhcp_routes
);
688 link
->lldp
= sd_lldp_unref(link
->lldp
);
692 link
->ipv4ll
= sd_ipv4ll_unref(link
->ipv4ll
);
693 link
->dhcp6_client
= sd_dhcp6_client_unref(link
->dhcp6_client
);
694 link
->ndisc
= sd_ndisc_unref(link
->ndisc
);
695 link
->radv
= sd_radv_unref(link
->radv
);
698 static Link
*link_free(Link
*link
) {
703 link_ntp_settings_clear(link
);
704 link_dns_settings_clear(link
);
706 link
->routes
= set_free_with_destructor(link
->routes
, route_free
);
707 link
->routes_foreign
= set_free_with_destructor(link
->routes_foreign
, route_free
);
709 link
->nexthops
= set_free_with_destructor(link
->nexthops
, nexthop_free
);
710 link
->nexthops_foreign
= set_free_with_destructor(link
->nexthops_foreign
, nexthop_free
);
712 link
->neighbors
= set_free_with_destructor(link
->neighbors
, neighbor_free
);
713 link
->neighbors_foreign
= set_free_with_destructor(link
->neighbors_foreign
, neighbor_free
);
715 link
->addresses
= set_free_with_destructor(link
->addresses
, address_free
);
716 link
->addresses_foreign
= set_free_with_destructor(link
->addresses_foreign
, address_free
);
718 while ((address
= link
->pool_addresses
)) {
719 LIST_REMOVE(addresses
, link
->pool_addresses
, address
);
720 address_free(address
);
723 link_lldp_emit_stop(link
);
724 link_free_engines(link
);
725 free(link
->lease_file
);
726 free(link
->lldp_file
);
729 strv_free(link
->alternative_names
);
734 (void) unlink(link
->state_file
);
735 free(link
->state_file
);
737 sd_device_unref(link
->sd_device
);
739 hashmap_free(link
->bound_to_links
);
740 hashmap_free(link
->bound_by_links
);
742 set_free_with_destructor(link
->slaves
, link_unref
);
744 network_unref(link
->network
);
749 DEFINE_TRIVIAL_REF_UNREF_FUNC(Link
, link
, link_free
);
751 int link_get(Manager
*m
, int ifindex
, Link
**ret
) {
758 link
= hashmap_get(m
->links
, INT_TO_PTR(ifindex
));
767 void link_set_state(Link
*link
, LinkState state
) {
770 if (link
->state
== state
)
773 log_link_debug(link
, "State changed: %s -> %s",
774 link_state_to_string(link
->state
),
775 link_state_to_string(state
));
779 link_send_changed(link
, "AdministrativeState", NULL
);
782 static void link_enter_unmanaged(Link
*link
) {
785 link_set_state(link
, LINK_STATE_UNMANAGED
);
790 int link_stop_clients(Link
*link
, bool may_keep_dhcp
) {
795 assert(link
->manager
);
796 assert(link
->manager
->event
);
798 dhcp4_release_old_lease(link
);
800 bool keep_dhcp
= may_keep_dhcp
&&
802 (link
->manager
->restarting
||
803 FLAGS_SET(link
->network
->keep_configuration
, KEEP_CONFIGURATION_DHCP_ON_STOP
));
805 if (link
->dhcp_client
&& !keep_dhcp
) {
806 k
= sd_dhcp_client_stop(link
->dhcp_client
);
808 r
= log_link_warning_errno(link
, k
, "Could not stop DHCPv4 client: %m");
812 k
= sd_ipv4ll_stop(link
->ipv4ll
);
814 r
= log_link_warning_errno(link
, k
, "Could not stop IPv4 link-local: %m");
818 LIST_FOREACH(addresses
, ad
, link
->network
->static_addresses
)
819 if (ad
->acd
&& sd_ipv4acd_is_running(ad
->acd
) == 0) {
820 k
= sd_ipv4acd_stop(ad
->acd
);
822 r
= log_link_warning_errno(link
, k
, "Could not stop IPv4 ACD client: %m");
825 if (link
->dhcp6_client
) {
826 k
= sd_dhcp6_client_stop(link
->dhcp6_client
);
828 r
= log_link_warning_errno(link
, k
, "Could not stop DHCPv6 client: %m");
832 k
= sd_ndisc_stop(link
->ndisc
);
834 r
= log_link_warning_errno(link
, k
, "Could not stop IPv6 Router Discovery: %m");
838 k
= sd_radv_stop(link
->radv
);
840 r
= log_link_warning_errno(link
, k
, "Could not stop IPv6 Router Advertisement: %m");
843 link_lldp_emit_stop(link
);
847 void link_enter_failed(Link
*link
) {
850 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
853 log_link_warning(link
, "Failed");
855 link_set_state(link
, LINK_STATE_FAILED
);
857 link_stop_clients(link
, false);
862 static int link_join_netdevs_after_configured(Link
*link
) {
867 HASHMAP_FOREACH(netdev
, link
->network
->stacked_netdevs
, i
) {
868 if (netdev
->ifindex
> 0)
869 /* Assume already enslaved. */
872 if (netdev_get_create_type(netdev
) != NETDEV_CREATE_AFTER_CONFIGURED
)
875 log_struct(LOG_DEBUG
,
876 LOG_LINK_INTERFACE(link
),
877 LOG_NETDEV_INTERFACE(netdev
),
878 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", netdev
->ifname
));
880 r
= netdev_join(netdev
, link
, NULL
);
882 return log_struct_errno(LOG_WARNING
, r
,
883 LOG_LINK_INTERFACE(link
),
884 LOG_NETDEV_INTERFACE(netdev
),
885 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", netdev
->ifname
));
891 static void link_enter_configured(Link
*link
) {
893 assert(link
->network
);
895 if (link
->state
!= LINK_STATE_CONFIGURING
)
898 link_set_state(link
, LINK_STATE_CONFIGURED
);
900 (void) link_join_netdevs_after_configured(link
);
905 static int link_request_set_routing_policy_rule(Link
*link
) {
906 RoutingPolicyRule
*rule
, *rrule
= NULL
;
910 assert(link
->network
);
912 link
->routing_policy_rules_configured
= false;
914 LIST_FOREACH(rules
, rule
, link
->network
->rules
) {
915 r
= routing_policy_rule_get(link
->manager
, rule
, &rrule
);
918 (void) routing_policy_rule_make_local(link
->manager
, rrule
);
922 r
= routing_policy_rule_configure(rule
, link
, NULL
);
924 return log_link_warning_errno(link
, r
, "Could not set routing policy rules: %m");
926 link
->routing_policy_rule_messages
++;
929 routing_policy_rule_purge(link
->manager
, link
);
930 if (link
->routing_policy_rule_messages
== 0) {
931 link
->routing_policy_rules_configured
= true;
932 link_check_ready(link
);
934 log_link_debug(link
, "Setting routing policy rules");
935 link_set_state(link
, LINK_STATE_CONFIGURING
);
941 static int nexthop_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
945 assert(link
->nexthop_messages
> 0);
946 assert(IN_SET(link
->state
, LINK_STATE_CONFIGURING
,
947 LINK_STATE_FAILED
, LINK_STATE_LINGER
));
949 link
->nexthop_messages
--;
951 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
954 r
= sd_netlink_message_get_errno(m
);
955 if (r
< 0 && r
!= -EEXIST
) {
956 log_link_message_warning_errno(link
, m
, r
, "Could not set nexthop");
957 link_enter_failed(link
);
961 if (link
->nexthop_messages
== 0) {
962 log_link_debug(link
, "Nexthop set");
963 link
->static_nexthops_configured
= true;
964 link_check_ready(link
);
970 int link_request_set_nexthop(Link
*link
) {
974 LIST_FOREACH(nexthops
, nh
, link
->network
->static_nexthops
) {
975 r
= nexthop_configure(nh
, link
, nexthop_handler
);
977 return log_link_warning_errno(link
, r
, "Could not set nexthop: %m");
979 link
->nexthop_messages
++;
982 if (link
->nexthop_messages
== 0) {
983 link
->static_nexthops_configured
= true;
984 link_check_ready(link
);
986 log_link_debug(link
, "Setting nexthop");
987 link_set_state(link
, LINK_STATE_CONFIGURING
);
993 static int route_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
997 assert(link
->route_messages
> 0);
998 assert(IN_SET(link
->state
, LINK_STATE_CONFIGURING
,
999 LINK_STATE_FAILED
, LINK_STATE_LINGER
));
1001 link
->route_messages
--;
1003 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1006 r
= sd_netlink_message_get_errno(m
);
1007 if (r
< 0 && r
!= -EEXIST
) {
1008 log_link_message_warning_errno(link
, m
, r
, "Could not set route");
1009 link_enter_failed(link
);
1013 if (link
->route_messages
== 0) {
1014 log_link_debug(link
, "Routes set");
1015 link
->static_routes_configured
= true;
1016 link_check_ready(link
);
1022 int link_request_set_routes(Link
*link
) {
1024 PHASE_NON_GATEWAY
, /* First phase: Routes without a gateway */
1025 PHASE_GATEWAY
, /* Second phase: Routes with a gateway */
1032 assert(link
->network
);
1033 assert(link
->addresses_configured
);
1034 assert(link
->address_messages
== 0);
1035 assert(link
->state
!= _LINK_STATE_INVALID
);
1037 link
->static_routes_configured
= false;
1038 link
->static_routes_ready
= false;
1040 if (!link_has_carrier(link
) && !link
->network
->configure_without_carrier
)
1041 /* During configuring addresses, the link lost its carrier. As networkd is dropping
1042 * the addresses now, let's not configure the routes either. */
1045 r
= link_request_set_routing_policy_rule(link
);
1049 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
1050 for (phase
= 0; phase
< _PHASE_MAX
; phase
++)
1051 LIST_FOREACH(routes
, rt
, link
->network
->static_routes
) {
1052 if (rt
->gateway_from_dhcp
)
1055 if ((in_addr_is_null(rt
->family
, &rt
->gw
) && ordered_set_isempty(rt
->multipath_routes
)) != (phase
== PHASE_NON_GATEWAY
))
1058 r
= route_configure(rt
, link
, route_handler
);
1060 return log_link_warning_errno(link
, r
, "Could not set routes: %m");
1062 link
->route_messages
++;
1065 if (link
->route_messages
== 0) {
1066 link
->static_routes_configured
= true;
1067 link_check_ready(link
);
1069 log_link_debug(link
, "Setting routes");
1070 link_set_state(link
, LINK_STATE_CONFIGURING
);
1076 void link_check_ready(Link
*link
) {
1083 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1089 if (!link
->addresses_configured
)
1092 if (!link
->neighbors_configured
)
1095 SET_FOREACH(a
, link
->addresses
, i
)
1096 if (!address_is_ready(a
))
1099 if (!link
->addresses_ready
) {
1100 link
->addresses_ready
= true;
1101 r
= link_request_set_routes(link
);
1103 link_enter_failed(link
);
1107 if (!link
->static_routes_configured
)
1110 if (!link
->static_routes_ready
) {
1111 link
->static_routes_ready
= true;
1112 r
= link_request_set_nexthop(link
);
1114 link_enter_failed(link
);
1118 if (!link
->static_nexthops_configured
)
1121 if (!link
->routing_policy_rules_configured
)
1124 if (!link
->tc_configured
)
1127 if (link_has_carrier(link
) || !link
->network
->configure_without_carrier
) {
1129 if (link_ipv4ll_enabled(link
, ADDRESS_FAMILY_IPV4
) && !link
->ipv4ll_address
)
1132 if (link_ipv6ll_enabled(link
) &&
1133 in_addr_is_null(AF_INET6
, (const union in_addr_union
*) &link
->ipv6ll_address
))
1136 if ((link_dhcp4_enabled(link
) || link_dhcp6_enabled(link
) || link_ipv6_accept_ra_enabled(link
)) &&
1137 !link
->dhcp4_configured
&&
1138 !link
->dhcp6_configured
&&
1139 !link
->ndisc_configured
&&
1140 !(link_ipv4ll_enabled(link
, ADDRESS_FAMILY_FALLBACK_IPV4
) && link
->ipv4ll_address
))
1141 /* When DHCP or RA is enabled, at least one protocol must provide an address, or
1142 * an IPv4ll fallback address must be configured. */
1146 if (link
->state
!= LINK_STATE_CONFIGURED
)
1147 link_enter_configured(link
);
1152 static int link_request_set_neighbors(Link
*link
) {
1157 assert(link
->network
);
1158 assert(link
->state
!= _LINK_STATE_INVALID
);
1160 link
->neighbors_configured
= false;
1162 LIST_FOREACH(neighbors
, neighbor
, link
->network
->neighbors
) {
1163 r
= neighbor_configure(neighbor
, link
, NULL
);
1165 return log_link_warning_errno(link
, r
, "Could not set neighbor: %m");
1168 if (link
->neighbor_messages
== 0) {
1169 link
->neighbors_configured
= true;
1170 link_check_ready(link
);
1172 log_link_debug(link
, "Setting neighbors");
1173 link_set_state(link
, LINK_STATE_CONFIGURING
);
1179 int address_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1185 assert(link
->ifname
);
1186 assert(link
->address_messages
> 0);
1187 assert(IN_SET(link
->state
, LINK_STATE_CONFIGURING
,
1188 LINK_STATE_FAILED
, LINK_STATE_LINGER
));
1190 link
->address_messages
--;
1192 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1195 r
= sd_netlink_message_get_errno(m
);
1196 if (r
< 0 && r
!= -EEXIST
) {
1197 log_link_message_warning_errno(link
, m
, r
, "Could not set address");
1198 link_enter_failed(link
);
1201 (void) manager_rtnl_process_address(rtnl
, m
, link
->manager
);
1203 if (link
->address_messages
== 0) {
1204 log_link_debug(link
, "Addresses set");
1205 link
->addresses_configured
= true;
1206 link_check_ready(link
);
1212 static int link_set_bridge_fdb(Link
*link
) {
1213 FdbEntry
*fdb_entry
;
1216 LIST_FOREACH(static_fdb_entries
, fdb_entry
, link
->network
->static_fdb_entries
) {
1217 r
= fdb_entry_configure(link
, fdb_entry
);
1219 return log_link_error_errno(link
, r
, "Failed to add MAC entry to static MAC table: %m");
1225 static int link_request_set_addresses(Link
*link
) {
1226 AddressLabel
*label
;
1232 assert(link
->network
);
1233 assert(link
->state
!= _LINK_STATE_INVALID
);
1235 /* Reset all *_configured flags we are configuring. */
1236 link
->addresses_configured
= false;
1237 link
->addresses_ready
= false;
1238 link
->neighbors_configured
= false;
1239 link
->static_routes_configured
= false;
1240 link
->static_routes_ready
= false;
1241 link
->static_nexthops_configured
= false;
1242 link
->routing_policy_rules_configured
= false;
1244 r
= link_set_bridge_fdb(link
);
1248 r
= link_request_set_neighbors(link
);
1252 LIST_FOREACH(addresses
, ad
, link
->network
->static_addresses
) {
1255 update
= address_get(link
, ad
->family
, &ad
->in_addr
, ad
->prefixlen
, NULL
) > 0;
1257 r
= address_configure(ad
, link
, address_handler
, update
);
1259 return log_link_warning_errno(link
, r
, "Could not set addresses: %m");
1261 link
->address_messages
++;
1264 if (IN_SET(link
->network
->router_prefix_delegation
,
1265 RADV_PREFIX_DELEGATION_STATIC
,
1266 RADV_PREFIX_DELEGATION_BOTH
))
1267 LIST_FOREACH(prefixes
, p
, link
->network
->static_prefixes
) {
1268 _cleanup_(address_freep
) Address
*address
= NULL
;
1273 r
= address_new(&address
);
1275 return log_link_error_errno(link
, r
, "Could not allocate address: %m");
1277 r
= sd_radv_prefix_get_prefix(p
->radv_prefix
, &address
->in_addr
.in6
, &address
->prefixlen
);
1281 r
= generate_ipv6_eui_64_address(link
, &address
->in_addr
.in6
);
1285 address
->family
= AF_INET6
;
1286 r
= address_configure(address
, link
, address_handler
, true);
1288 return log_link_warning_errno(link
, r
, "Could not set addresses: %m");
1290 link
->address_messages
++;
1293 LIST_FOREACH(labels
, label
, link
->network
->address_labels
) {
1294 r
= address_label_configure(label
, link
, NULL
, false);
1296 return log_link_warning_errno(link
, r
, "Could not set address label: %m");
1298 link
->address_label_messages
++;
1301 /* now that we can figure out a default address for the dhcp server,
1303 if (link_dhcp4_server_enabled(link
) && (link
->flags
& IFF_UP
)) {
1304 r
= dhcp4_server_configure(link
);
1307 log_link_debug(link
, "Offering DHCPv4 leases");
1310 if (link
->address_messages
== 0) {
1311 link
->addresses_configured
= true;
1312 link_check_ready(link
);
1314 log_link_debug(link
, "Setting addresses");
1315 link_set_state(link
, LINK_STATE_CONFIGURING
);
1321 static int link_set_bridge_vlan(Link
*link
) {
1324 r
= br_vlan_configure(link
, link
->network
->pvid
, link
->network
->br_vid_bitmap
, link
->network
->br_untagged_bitmap
);
1326 log_link_error_errno(link
, r
, "Failed to assign VLANs to bridge port: %m");
1331 static int link_set_proxy_arp(Link
*link
) {
1334 if (!link_proxy_arp_enabled(link
))
1337 r
= sysctl_write_ip_property_boolean(AF_INET
, link
->ifname
, "proxy_arp", link
->network
->proxy_arp
> 0);
1339 log_link_warning_errno(link
, r
, "Cannot configure proxy ARP for interface: %m");
1344 static int link_configure_continue(Link
*link
);
1346 static int set_mtu_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1351 assert(link
->ifname
);
1353 link
->setting_mtu
= false;
1355 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1358 r
= sd_netlink_message_get_errno(m
);
1360 log_link_message_warning_errno(link
, m
, r
, "Could not set MTU, ignoring");
1362 log_link_debug(link
, "Setting MTU done.");
1364 if (link
->state
== LINK_STATE_INITIALIZED
) {
1365 r
= link_configure_continue(link
);
1367 link_enter_failed(link
);
1373 int link_set_mtu(Link
*link
, uint32_t mtu
) {
1374 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1378 assert(link
->manager
);
1379 assert(link
->manager
->rtnl
);
1381 if (mtu
== 0 || link
->setting_mtu
)
1384 if (link
->mtu
== mtu
)
1387 log_link_debug(link
, "Setting MTU: %" PRIu32
, mtu
);
1389 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1391 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1393 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
1394 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1395 if (link_ipv6_enabled(link
) && mtu
< IPV6_MIN_MTU
) {
1397 log_link_warning(link
, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU
) ", as "
1398 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU
) " bytes");
1403 r
= sd_netlink_message_append_u32(req
, IFLA_MTU
, mtu
);
1405 return log_link_error_errno(link
, r
, "Could not append MTU: %m");
1407 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, set_mtu_handler
,
1408 link_netlink_destroy_callback
, link
);
1410 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1413 link
->setting_mtu
= true;
1418 static bool link_reduces_vlan_mtu(Link
*link
) {
1419 /* See netif_reduces_vlan_mtu() in kernel. */
1420 return streq_ptr(link
->kind
, "macsec");
1423 static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link
*link
) {
1428 HASHMAP_FOREACH(dev
, link
->network
->stacked_netdevs
, i
)
1429 if (dev
->kind
== NETDEV_KIND_VLAN
&& dev
->mtu
> 0)
1430 /* See vlan_dev_change_mtu() in kernel. */
1431 mtu
= MAX(mtu
, link_reduces_vlan_mtu(link
) ? dev
->mtu
+ 4 : dev
->mtu
);
1433 else if (dev
->kind
== NETDEV_KIND_MACVLAN
&& dev
->mtu
> mtu
)
1434 /* See macvlan_change_mtu() in kernel. */
1440 static int link_configure_mtu(Link
*link
) {
1444 assert(link
->network
);
1446 if (link
->network
->mtu
> 0)
1447 return link_set_mtu(link
, link
->network
->mtu
);
1449 mtu
= link_get_requested_mtu_by_stacked_netdevs(link
);
1450 if (link
->mtu
>= mtu
)
1453 log_link_notice(link
, "Bumping MTU bytes from %"PRIu32
" to %"PRIu32
" because of stacked device. "
1454 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1457 return link_set_mtu(link
, mtu
);
1460 static int set_flags_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1465 assert(link
->ifname
);
1467 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1470 r
= sd_netlink_message_get_errno(m
);
1472 log_link_message_warning_errno(link
, m
, r
, "Could not set link flags, ignoring");
1477 static int link_set_flags(Link
*link
) {
1478 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1479 unsigned ifi_change
= 0;
1480 unsigned ifi_flags
= 0;
1484 assert(link
->manager
);
1485 assert(link
->manager
->rtnl
);
1487 if (link
->flags
& IFF_LOOPBACK
)
1493 if (link
->network
->arp
< 0 && link
->network
->multicast
< 0 && link
->network
->allmulticast
< 0)
1496 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1498 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1500 if (link
->network
->arp
>= 0) {
1501 ifi_change
|= IFF_NOARP
;
1502 SET_FLAG(ifi_flags
, IFF_NOARP
, link
->network
->arp
== 0);
1505 if (link
->network
->multicast
>= 0) {
1506 ifi_change
|= IFF_MULTICAST
;
1507 SET_FLAG(ifi_flags
, IFF_MULTICAST
, link
->network
->multicast
);
1510 if (link
->network
->allmulticast
>= 0) {
1511 ifi_change
|= IFF_ALLMULTI
;
1512 SET_FLAG(ifi_flags
, IFF_ALLMULTI
, link
->network
->allmulticast
);
1515 r
= sd_rtnl_message_link_set_flags(req
, ifi_flags
, ifi_change
);
1517 return log_link_error_errno(link
, r
, "Could not set link flags: %m");
1519 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, set_flags_handler
,
1520 link_netlink_destroy_callback
, link
);
1522 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1529 static int link_acquire_ipv6_conf(Link
*link
) {
1534 if (link_ipv6_accept_ra_enabled(link
)) {
1535 assert(link
->ndisc
);
1537 log_link_debug(link
, "Discovering IPv6 routers");
1539 r
= sd_ndisc_start(link
->ndisc
);
1540 if (r
< 0 && r
!= -EBUSY
)
1541 return log_link_warning_errno(link
, r
, "Could not start IPv6 Router Discovery: %m");
1544 if (link_radv_enabled(link
)) {
1546 assert(in_addr_is_link_local(AF_INET6
, (const union in_addr_union
*)&link
->ipv6ll_address
) > 0);
1548 log_link_debug(link
, "Starting IPv6 Router Advertisements");
1550 r
= radv_emit_dns(link
);
1552 return log_link_warning_errno(link
, r
, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
1554 r
= sd_radv_start(link
->radv
);
1555 if (r
< 0 && r
!= -EBUSY
)
1556 return log_link_warning_errno(link
, r
, "Could not start IPv6 Router Advertisement: %m");
1559 if (link_dhcp6_enabled(link
) && link
->network
->dhcp6_without_ra
) {
1560 assert(link
->dhcp6_client
);
1561 assert(in_addr_is_link_local(AF_INET6
, (const union in_addr_union
*)&link
->ipv6ll_address
) > 0);
1563 r
= dhcp6_request_address(link
, true);
1564 if (r
< 0 && r
!= -EBUSY
)
1565 return log_link_warning_errno(link
, r
, "Could not acquire DHCPv6 lease: %m");
1567 log_link_debug(link
, "Acquiring DHCPv6 lease");
1570 (void) dhcp6_request_prefix_delegation(link
);
1575 static int link_acquire_ipv4_conf(Link
*link
) {
1579 assert(link
->manager
);
1580 assert(link
->manager
->event
);
1582 if (link_ipv4ll_enabled(link
, ADDRESS_FAMILY_IPV4
)) {
1583 assert(link
->ipv4ll
);
1585 log_link_debug(link
, "Acquiring IPv4 link-local address");
1587 r
= sd_ipv4ll_start(link
->ipv4ll
);
1589 return log_link_warning_errno(link
, r
, "Could not acquire IPv4 link-local address: %m");
1592 if (link_dhcp4_enabled(link
)) {
1593 assert(link
->dhcp_client
);
1595 log_link_debug(link
, "Acquiring DHCPv4 lease");
1597 r
= sd_dhcp_client_start(link
->dhcp_client
);
1599 return log_link_warning_errno(link
, r
, "Could not acquire DHCPv4 lease: %m");
1605 static int link_acquire_conf(Link
*link
) {
1610 r
= link_acquire_ipv4_conf(link
);
1614 if (!in_addr_is_null(AF_INET6
, (const union in_addr_union
*) &link
->ipv6ll_address
)) {
1615 r
= link_acquire_ipv6_conf(link
);
1620 if (link_lldp_emit_enabled(link
)) {
1621 r
= link_lldp_emit_start(link
);
1623 return log_link_warning_errno(link
, r
, "Failed to start LLDP transmission: %m");
1629 bool link_has_carrier(Link
*link
) {
1630 /* see Documentation/networking/operstates.txt in the kernel sources */
1632 if (link
->kernel_operstate
== IF_OPER_UP
)
1635 if (link
->kernel_operstate
== IF_OPER_UNKNOWN
)
1636 /* operstate may not be implemented, so fall back to flags */
1637 if (FLAGS_SET(link
->flags
, IFF_LOWER_UP
| IFF_RUNNING
) &&
1638 !FLAGS_SET(link
->flags
, IFF_DORMANT
))
1644 static int link_address_genmode_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1649 link
->setting_genmode
= false;
1651 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1654 r
= sd_netlink_message_get_errno(m
);
1656 log_link_message_warning_errno(link
, m
, r
, "Could not set address genmode for interface, ignoring");
1658 log_link_debug(link
, "Setting address genmode done.");
1660 if (link
->state
== LINK_STATE_INITIALIZED
) {
1661 r
= link_configure_continue(link
);
1663 link_enter_failed(link
);
1669 static int link_configure_addrgen_mode(Link
*link
) {
1670 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1671 uint8_t ipv6ll_mode
;
1675 assert(link
->network
);
1676 assert(link
->manager
);
1677 assert(link
->manager
->rtnl
);
1679 if (!socket_ipv6_is_supported() || link
->setting_genmode
)
1682 log_link_debug(link
, "Setting address genmode for link");
1684 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1686 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1688 r
= sd_netlink_message_open_container(req
, IFLA_AF_SPEC
);
1690 return log_link_error_errno(link
, r
, "Could not open IFLA_AF_SPEC container: %m");
1692 r
= sd_netlink_message_open_container(req
, AF_INET6
);
1694 return log_link_error_errno(link
, r
, "Could not open AF_INET6 container: %m");
1696 if (!link_ipv6ll_enabled(link
))
1697 ipv6ll_mode
= IN6_ADDR_GEN_MODE_NONE
;
1698 else if (link
->network
->ipv6_address_gen_mode
< 0) {
1699 r
= sysctl_read_ip_property(AF_INET6
, link
->ifname
, "stable_secret", NULL
);
1701 /* The file may not exist. And even if it exists, when stable_secret is unset,
1702 * reading the file fails with EIO. */
1703 log_link_debug_errno(link
, r
, "Failed to read sysctl property stable_secret: %m");
1705 ipv6ll_mode
= IN6_ADDR_GEN_MODE_EUI64
;
1707 ipv6ll_mode
= IN6_ADDR_GEN_MODE_STABLE_PRIVACY
;
1709 ipv6ll_mode
= link
->network
->ipv6_address_gen_mode
;
1711 r
= sd_netlink_message_append_u8(req
, IFLA_INET6_ADDR_GEN_MODE
, ipv6ll_mode
);
1713 return log_link_error_errno(link
, r
, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1715 r
= sd_netlink_message_close_container(req
);
1717 return log_link_error_errno(link
, r
, "Could not close AF_INET6 container: %m");
1719 r
= sd_netlink_message_close_container(req
);
1721 return log_link_error_errno(link
, r
, "Could not close IFLA_AF_SPEC container: %m");
1723 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, link_address_genmode_handler
,
1724 link_netlink_destroy_callback
, link
);
1726 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1729 link
->setting_genmode
= true;
1734 static int link_up_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1739 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1742 r
= sd_netlink_message_get_errno(m
);
1744 /* we warn but don't fail the link, as it may be brought up later */
1745 log_link_message_warning_errno(link
, m
, r
, "Could not bring up interface");
1750 static int link_up(Link
*link
) {
1751 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1755 assert(link
->network
);
1756 assert(link
->manager
);
1757 assert(link
->manager
->rtnl
);
1759 log_link_debug(link
, "Bringing link up");
1761 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1763 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1765 /* set it free if not enslaved with networkd */
1766 if (!link
->network
->bridge
&& !link
->network
->bond
&& !link
->network
->vrf
) {
1767 r
= sd_netlink_message_append_u32(req
, IFLA_MASTER
, 0);
1769 return log_link_error_errno(link
, r
, "Could not append IFLA_MASTER attribute: %m");
1772 r
= sd_rtnl_message_link_set_flags(req
, IFF_UP
, IFF_UP
);
1774 return log_link_error_errno(link
, r
, "Could not set link flags: %m");
1776 if (link
->network
->mac
) {
1777 r
= sd_netlink_message_append_ether_addr(req
, IFLA_ADDRESS
, link
->network
->mac
);
1779 return log_link_error_errno(link
, r
, "Could not set MAC address: %m");
1782 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, link_up_handler
,
1783 link_netlink_destroy_callback
, link
);
1785 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1792 static int link_down_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1797 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1800 r
= sd_netlink_message_get_errno(m
);
1802 log_link_message_warning_errno(link
, m
, r
, "Could not bring down interface");
1807 int link_down(Link
*link
, link_netlink_message_handler_t callback
) {
1808 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1812 assert(link
->manager
);
1813 assert(link
->manager
->rtnl
);
1815 log_link_debug(link
, "Bringing link down");
1817 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
,
1818 RTM_SETLINK
, link
->ifindex
);
1820 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1822 r
= sd_rtnl_message_link_set_flags(req
, 0, IFF_UP
);
1824 return log_link_error_errno(link
, r
, "Could not set link flags: %m");
1826 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
,
1827 callback
?: link_down_handler
,
1828 link_netlink_destroy_callback
, link
);
1830 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1837 static int link_group_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1842 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1845 r
= sd_netlink_message_get_errno(m
);
1847 log_link_message_warning_errno(link
, m
, r
, "Could not set group for the interface");
1852 static int link_set_group(Link
*link
) {
1853 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1857 assert(link
->network
);
1858 assert(link
->manager
);
1859 assert(link
->manager
->rtnl
);
1861 if (link
->network
->group
<= 0)
1864 log_link_debug(link
, "Setting group");
1866 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1868 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1870 r
= sd_netlink_message_append_u32(req
, IFLA_GROUP
, link
->network
->group
);
1872 return log_link_error_errno(link
, r
, "Could not set link group: %m");
1874 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, link_group_handler
,
1875 link_netlink_destroy_callback
, link
);
1877 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1884 static int link_handle_bound_to_list(Link
*link
) {
1888 bool required_up
= false;
1889 bool link_is_up
= false;
1893 if (hashmap_isempty(link
->bound_to_links
))
1896 if (link
->flags
& IFF_UP
)
1899 HASHMAP_FOREACH (l
, link
->bound_to_links
, i
)
1900 if (link_has_carrier(l
)) {
1905 if (!required_up
&& link_is_up
) {
1906 r
= link_down(link
, NULL
);
1909 } else if (required_up
&& !link_is_up
) {
1918 static int link_handle_bound_by_list(Link
*link
) {
1925 if (hashmap_isempty(link
->bound_by_links
))
1928 HASHMAP_FOREACH (l
, link
->bound_by_links
, i
) {
1929 r
= link_handle_bound_to_list(l
);
1937 static int link_put_carrier(Link
*link
, Link
*carrier
, Hashmap
**h
) {
1943 if (link
== carrier
)
1946 if (hashmap_get(*h
, INT_TO_PTR(carrier
->ifindex
)))
1949 r
= hashmap_ensure_allocated(h
, NULL
);
1953 r
= hashmap_put(*h
, INT_TO_PTR(carrier
->ifindex
), carrier
);
1960 static int link_new_bound_by_list(Link
*link
) {
1965 bool list_updated
= false;
1968 assert(link
->manager
);
1972 HASHMAP_FOREACH(carrier
, m
->links
, i
) {
1973 if (!carrier
->network
)
1976 if (strv_isempty(carrier
->network
->bind_carrier
))
1979 if (strv_fnmatch(carrier
->network
->bind_carrier
, link
->ifname
)) {
1980 r
= link_put_carrier(link
, carrier
, &link
->bound_by_links
);
1984 list_updated
= true;
1991 HASHMAP_FOREACH(carrier
, link
->bound_by_links
, i
) {
1992 r
= link_put_carrier(carrier
, link
, &carrier
->bound_to_links
);
1996 link_dirty(carrier
);
2002 static int link_new_bound_to_list(Link
*link
) {
2007 bool list_updated
= false;
2010 assert(link
->manager
);
2015 if (strv_isempty(link
->network
->bind_carrier
))
2020 HASHMAP_FOREACH (carrier
, m
->links
, i
) {
2021 if (strv_fnmatch(link
->network
->bind_carrier
, carrier
->ifname
)) {
2022 r
= link_put_carrier(link
, carrier
, &link
->bound_to_links
);
2026 list_updated
= true;
2033 HASHMAP_FOREACH (carrier
, link
->bound_to_links
, i
) {
2034 r
= link_put_carrier(carrier
, link
, &carrier
->bound_by_links
);
2038 link_dirty(carrier
);
2044 static int link_new_carrier_maps(Link
*link
) {
2047 r
= link_new_bound_by_list(link
);
2051 r
= link_handle_bound_by_list(link
);
2055 r
= link_new_bound_to_list(link
);
2059 r
= link_handle_bound_to_list(link
);
2066 static void link_free_bound_to_list(Link
*link
) {
2070 HASHMAP_FOREACH (bound_to
, link
->bound_to_links
, i
) {
2071 hashmap_remove(link
->bound_to_links
, INT_TO_PTR(bound_to
->ifindex
));
2073 if (hashmap_remove(bound_to
->bound_by_links
, INT_TO_PTR(link
->ifindex
)))
2074 link_dirty(bound_to
);
2080 static void link_free_bound_by_list(Link
*link
) {
2084 HASHMAP_FOREACH (bound_by
, link
->bound_by_links
, i
) {
2085 hashmap_remove(link
->bound_by_links
, INT_TO_PTR(bound_by
->ifindex
));
2087 if (hashmap_remove(bound_by
->bound_to_links
, INT_TO_PTR(link
->ifindex
))) {
2088 link_dirty(bound_by
);
2089 link_handle_bound_to_list(bound_by
);
2096 static void link_free_carrier_maps(Link
*link
) {
2097 bool list_updated
= false;
2101 if (!hashmap_isempty(link
->bound_to_links
)) {
2102 link_free_bound_to_list(link
);
2103 list_updated
= true;
2106 if (!hashmap_isempty(link
->bound_by_links
)) {
2107 link_free_bound_by_list(link
);
2108 list_updated
= true;
2117 static int link_append_to_master(Link
*link
, NetDev
*netdev
) {
2124 r
= link_get(link
->manager
, netdev
->ifindex
, &master
);
2128 r
= set_ensure_allocated(&master
->slaves
, NULL
);
2132 r
= set_put(master
->slaves
, link
);
2140 static void link_drop_from_master(Link
*link
, NetDev
*netdev
) {
2145 if (!link
->manager
|| !netdev
)
2148 if (link_get(link
->manager
, netdev
->ifindex
, &master
) < 0)
2151 link_unref(set_remove(master
->slaves
, link
));
2154 static void link_detach_from_manager(Link
*link
) {
2155 if (!link
|| !link
->manager
)
2158 link_unref(set_remove(link
->manager
->links_requesting_uuid
, link
));
2161 /* The following must be called at last. */
2162 assert_se(hashmap_remove(link
->manager
->links
, INT_TO_PTR(link
->ifindex
)) == link
);
2166 void link_drop(Link
*link
) {
2167 if (!link
|| link
->state
== LINK_STATE_LINGER
)
2170 link_set_state(link
, LINK_STATE_LINGER
);
2172 link_free_carrier_maps(link
);
2174 if (link
->network
) {
2175 link_drop_from_master(link
, link
->network
->bridge
);
2176 link_drop_from_master(link
, link
->network
->bond
);
2179 log_link_debug(link
, "Link removed");
2181 (void) unlink(link
->state_file
);
2182 link_detach_from_manager(link
);
2185 static int link_joined(Link
*link
) {
2189 assert(link
->network
);
2191 if (!hashmap_isempty(link
->bound_to_links
)) {
2192 r
= link_handle_bound_to_list(link
);
2195 } else if (!(link
->flags
& IFF_UP
)) {
2198 link_enter_failed(link
);
2203 if (link
->network
->bridge
) {
2204 r
= link_set_bridge(link
);
2206 log_link_error_errno(link
, r
, "Could not set bridge message: %m");
2208 r
= link_append_to_master(link
, link
->network
->bridge
);
2210 log_link_error_errno(link
, r
, "Failed to add to bridge master's slave list: %m");
2213 if (link
->network
->bond
) {
2214 r
= link_set_bond(link
);
2216 log_link_error_errno(link
, r
, "Could not set bond message: %m");
2218 r
= link_append_to_master(link
, link
->network
->bond
);
2220 log_link_error_errno(link
, r
, "Failed to add to bond master's slave list: %m");
2223 if (link
->network
->use_br_vlan
&&
2224 (link
->network
->bridge
|| streq_ptr("bridge", link
->kind
))) {
2225 r
= link_set_bridge_vlan(link
);
2227 log_link_error_errno(link
, r
, "Could not set bridge vlan: %m");
2230 /* Skip setting up addresses until it gets carrier,
2231 or it would try to set addresses twice,
2232 which is bad for non-idempotent steps. */
2233 if (!link_has_carrier(link
) && !link
->network
->configure_without_carrier
)
2236 link_set_state(link
, LINK_STATE_CONFIGURING
);
2237 return link_request_set_addresses(link
);
2240 static int netdev_join_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
2244 assert(link
->network
);
2245 assert(link
->enslaving
> 0);
2249 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
2252 r
= sd_netlink_message_get_errno(m
);
2253 if (r
< 0 && r
!= -EEXIST
) {
2254 log_link_message_warning_errno(link
, m
, r
, "Could not join netdev");
2255 link_enter_failed(link
);
2259 log_link_debug(link
, "Joined netdev");
2261 if (link
->enslaving
== 0) {
2262 r
= link_joined(link
);
2264 link_enter_failed(link
);
2270 static int link_enter_join_netdev(Link
*link
) {
2276 assert(link
->network
);
2277 assert(link
->state
== LINK_STATE_INITIALIZED
);
2279 link_set_state(link
, LINK_STATE_CONFIGURING
);
2282 link
->enslaving
= 0;
2284 if (link
->network
->bond
) {
2285 if (link
->network
->bond
->state
== NETDEV_STATE_READY
&&
2286 link
->network
->bond
->ifindex
== link
->master_ifindex
)
2287 return link_joined(link
);
2289 log_struct(LOG_DEBUG
,
2290 LOG_LINK_INTERFACE(link
),
2291 LOG_NETDEV_INTERFACE(link
->network
->bond
),
2292 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", link
->network
->bond
->ifname
));
2296 r
= netdev_join(link
->network
->bond
, link
, netdev_join_handler
);
2298 log_struct_errno(LOG_WARNING
, r
,
2299 LOG_LINK_INTERFACE(link
),
2300 LOG_NETDEV_INTERFACE(link
->network
->bond
),
2301 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", link
->network
->bond
->ifname
));
2302 link_enter_failed(link
);
2307 if (link
->network
->bridge
) {
2308 log_struct(LOG_DEBUG
,
2309 LOG_LINK_INTERFACE(link
),
2310 LOG_NETDEV_INTERFACE(link
->network
->bridge
),
2311 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", link
->network
->bridge
->ifname
));
2315 r
= netdev_join(link
->network
->bridge
, link
, netdev_join_handler
);
2317 log_struct_errno(LOG_WARNING
, r
,
2318 LOG_LINK_INTERFACE(link
),
2319 LOG_NETDEV_INTERFACE(link
->network
->bridge
),
2320 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", link
->network
->bridge
->ifname
));
2321 link_enter_failed(link
);
2326 if (link
->network
->vrf
) {
2327 log_struct(LOG_DEBUG
,
2328 LOG_LINK_INTERFACE(link
),
2329 LOG_NETDEV_INTERFACE(link
->network
->vrf
),
2330 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", link
->network
->vrf
->ifname
));
2334 r
= netdev_join(link
->network
->vrf
, link
, netdev_join_handler
);
2336 log_struct_errno(LOG_WARNING
, r
,
2337 LOG_LINK_INTERFACE(link
),
2338 LOG_NETDEV_INTERFACE(link
->network
->vrf
),
2339 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", link
->network
->vrf
->ifname
));
2340 link_enter_failed(link
);
2345 HASHMAP_FOREACH(netdev
, link
->network
->stacked_netdevs
, i
) {
2347 if (netdev
->ifindex
> 0)
2348 /* Assume already enslaved. */
2351 if (netdev_get_create_type(netdev
) != NETDEV_CREATE_STACKED
)
2354 log_struct(LOG_DEBUG
,
2355 LOG_LINK_INTERFACE(link
),
2356 LOG_NETDEV_INTERFACE(netdev
),
2357 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", netdev
->ifname
));
2361 r
= netdev_join(netdev
, link
, netdev_join_handler
);
2363 log_struct_errno(LOG_WARNING
, r
,
2364 LOG_LINK_INTERFACE(link
),
2365 LOG_NETDEV_INTERFACE(netdev
),
2366 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", netdev
->ifname
));
2367 link_enter_failed(link
);
2372 if (link
->enslaving
== 0)
2373 return link_joined(link
);
2378 static int link_set_ipv4_forward(Link
*link
) {
2381 if (!link_ipv4_forward_enabled(link
))
2384 /* We propagate the forwarding flag from one interface to the
2385 * global setting one way. This means: as long as at least one
2386 * interface was configured at any time that had IP forwarding
2387 * enabled the setting will stay on for good. We do this
2388 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2389 * somewhat in sync (see below). */
2391 r
= sysctl_write_ip_property(AF_INET
, NULL
, "ip_forward", "1");
2393 log_link_warning_errno(link
, r
, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
2398 static int link_set_ipv6_forward(Link
*link
) {
2401 if (!link_ipv6_forward_enabled(link
))
2404 /* On Linux, the IPv6 stack does not know a per-interface
2405 * packet forwarding setting: either packet forwarding is on
2406 * for all, or off for all. We hence don't bother with a
2407 * per-interface setting, but simply propagate the interface
2408 * flag, if it is set, to the global flag, one-way. Note that
2409 * while IPv4 would allow a per-interface flag, we expose the
2410 * same behaviour there and also propagate the setting from
2411 * one to all, to keep things simple (see above). */
2413 r
= sysctl_write_ip_property(AF_INET6
, "all", "forwarding", "1");
2415 log_link_warning_errno(link
, r
, "Cannot configure IPv6 packet forwarding, ignoring: %m");
2420 static int link_set_ipv6_privacy_extensions(Link
*link
) {
2421 IPv6PrivacyExtensions s
;
2424 s
= link_ipv6_privacy_extensions(link
);
2428 r
= sysctl_write_ip_property_int(AF_INET6
, link
->ifname
, "use_tempaddr", (int) link
->network
->ipv6_privacy_extensions
);
2430 log_link_warning_errno(link
, r
, "Cannot configure IPv6 privacy extension for interface: %m");
2435 static int link_set_ipv6_accept_ra(Link
*link
) {
2438 /* Make this a NOP if IPv6 is not available */
2439 if (!socket_ipv6_is_supported())
2442 if (link
->flags
& IFF_LOOPBACK
)
2448 r
= sysctl_write_ip_property(AF_INET6
, link
->ifname
, "accept_ra", "0");
2450 log_link_warning_errno(link
, r
, "Cannot disable kernel IPv6 accept_ra for interface: %m");
2455 static int link_set_ipv6_dad_transmits(Link
*link
) {
2458 /* Make this a NOP if IPv6 is not available */
2459 if (!socket_ipv6_is_supported())
2462 if (link
->flags
& IFF_LOOPBACK
)
2468 if (link
->network
->ipv6_dad_transmits
< 0)
2471 r
= sysctl_write_ip_property_int(AF_INET6
, link
->ifname
, "dad_transmits", link
->network
->ipv6_dad_transmits
);
2473 log_link_warning_errno(link
, r
, "Cannot set IPv6 dad transmits for interface: %m");
2478 static int link_set_ipv6_hop_limit(Link
*link
) {
2481 /* Make this a NOP if IPv6 is not available */
2482 if (!socket_ipv6_is_supported())
2485 if (link
->flags
& IFF_LOOPBACK
)
2491 if (link
->network
->ipv6_hop_limit
< 0)
2494 r
= sysctl_write_ip_property_int(AF_INET6
, link
->ifname
, "hop_limit", link
->network
->ipv6_hop_limit
);
2496 log_link_warning_errno(link
, r
, "Cannot set IPv6 hop limit for interface: %m");
2501 static int link_set_ipv6_mtu(Link
*link
) {
2504 /* Make this a NOP if IPv6 is not available */
2505 if (!socket_ipv6_is_supported())
2508 if (link
->flags
& IFF_LOOPBACK
)
2511 if (link
->network
->ipv6_mtu
== 0)
2514 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
2515 * on the interface. Bump up IPv6 MTU bytes to IPV6_MTU_MIN. */
2516 if (link
->network
->ipv6_mtu
< IPV6_MIN_MTU
) {
2517 log_link_notice(link
, "Bumping IPv6 MTU to "STRINGIFY(IPV6_MIN_MTU
)" byte minimum required");
2518 link
->network
->ipv6_mtu
= IPV6_MIN_MTU
;
2521 r
= sysctl_write_ip_property_uint32(AF_INET6
, link
->ifname
, "mtu", link
->network
->ipv6_mtu
);
2523 if (link
->mtu
< link
->network
->ipv6_mtu
)
2524 log_link_warning(link
, "Cannot set IPv6 MTU %"PRIu32
" higher than device MTU %"PRIu32
,
2525 link
->network
->ipv6_mtu
, link
->mtu
);
2527 log_link_warning_errno(link
, r
, "Cannot set IPv6 MTU for interface: %m");
2530 link
->ipv6_mtu_set
= true;
2535 static int link_set_ipv4_accept_local(Link
*link
) {
2538 if (link
->flags
& IFF_LOOPBACK
)
2541 if (link
->network
->ipv4_accept_local
< 0)
2544 r
= sysctl_write_ip_property_boolean(AF_INET
, link
->ifname
, "accept_local", link
->network
->ipv4_accept_local
);
2546 log_link_warning_errno(link
, r
, "Cannot set IPv4 accept_local flag for interface: %m");
2551 static bool link_is_static_address_configured(Link
*link
, Address
*address
) {
2552 Address
*net_address
;
2560 LIST_FOREACH(addresses
, net_address
, link
->network
->static_addresses
)
2561 if (address_equal(net_address
, address
))
2567 static bool link_is_neighbor_configured(Link
*link
, Neighbor
*neighbor
) {
2568 Neighbor
*net_neighbor
;
2576 LIST_FOREACH(neighbors
, net_neighbor
, link
->network
->neighbors
)
2577 if (neighbor_equal(net_neighbor
, neighbor
))
2583 static bool link_is_static_route_configured(Link
*link
, Route
*route
) {
2592 LIST_FOREACH(routes
, net_route
, link
->network
->static_routes
)
2593 if (route_equal(net_route
, route
))
2599 static bool link_address_is_dynamic(Link
*link
, Address
*address
) {
2606 if (address
->cinfo
.ifa_prefered
!= CACHE_INFO_INFINITY_LIFE_TIME
)
2609 /* Even when the address is leased from a DHCP server, networkd assign the address
2610 * without lifetime when KeepConfiguration=dhcp. So, let's check that we have
2611 * corresponding routes with RTPROT_DHCP. */
2612 SET_FOREACH(route
, link
->routes_foreign
, i
) {
2613 if (route
->protocol
!= RTPROT_DHCP
)
2616 if (address
->family
!= route
->family
)
2619 if (in_addr_equal(address
->family
, &address
->in_addr
, &route
->prefsrc
))
2626 static int link_enumerate_ipv6_tentative_addresses(Link
*link
) {
2627 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
, *reply
= NULL
;
2628 sd_netlink_message
*addr
;
2632 assert(link
->manager
);
2633 assert(link
->manager
->rtnl
);
2635 r
= sd_rtnl_message_new_addr(link
->manager
->rtnl
, &req
, RTM_GETADDR
, 0, AF_INET6
);
2639 r
= sd_netlink_call(link
->manager
->rtnl
, req
, 0, &reply
);
2643 for (addr
= reply
; addr
; addr
= sd_netlink_message_next(addr
)) {
2644 unsigned char flags
;
2647 r
= sd_rtnl_message_addr_get_ifindex(addr
, &ifindex
);
2649 log_link_warning_errno(link
, r
, "rtnl: invalid ifindex, ignoring: %m");
2651 } else if (link
->ifindex
!= ifindex
)
2654 r
= sd_rtnl_message_addr_get_flags(addr
, &flags
);
2656 log_link_warning_errno(link
, r
, "rtnl: received address message with invalid flags, ignoring: %m");
2658 } else if (!(flags
& IFA_F_TENTATIVE
))
2661 log_link_debug(link
, "Found tentative ipv6 link-local address");
2662 (void) manager_rtnl_process_address(link
->manager
->rtnl
, addr
, link
->manager
);
2668 static int link_drop_foreign_config(Link
*link
) {
2675 /* The kernel doesn't notify us about tentative addresses;
2676 * so if ipv6ll is disabled, we need to enumerate them now so we can drop them below */
2677 if (!link_ipv6ll_enabled(link
)) {
2678 r
= link_enumerate_ipv6_tentative_addresses(link
);
2683 SET_FOREACH(address
, link
->addresses_foreign
, i
) {
2684 /* we consider IPv6LL addresses to be managed by the kernel */
2685 if (address
->family
== AF_INET6
&& in_addr_is_link_local(AF_INET6
, &address
->in_addr
) == 1 && link_ipv6ll_enabled(link
))
2688 if (link_address_is_dynamic(link
, address
)) {
2689 if (link
->network
&& FLAGS_SET(link
->network
->keep_configuration
, KEEP_CONFIGURATION_DHCP
))
2691 } else if (link
->network
&& FLAGS_SET(link
->network
->keep_configuration
, KEEP_CONFIGURATION_STATIC
))
2694 if (link_is_static_address_configured(link
, address
)) {
2695 r
= address_add(link
, address
->family
, &address
->in_addr
, address
->prefixlen
, NULL
);
2697 return log_link_error_errno(link
, r
, "Failed to add address: %m");
2699 r
= address_remove(address
, link
, NULL
);
2705 SET_FOREACH(neighbor
, link
->neighbors_foreign
, i
) {
2706 if (link_is_neighbor_configured(link
, neighbor
)) {
2707 r
= neighbor_add(link
, neighbor
->family
, &neighbor
->in_addr
, &neighbor
->lladdr
, neighbor
->lladdr_size
, NULL
);
2711 r
= neighbor_remove(neighbor
, link
, NULL
);
2717 SET_FOREACH(route
, link
->routes_foreign
, i
) {
2718 /* do not touch routes managed by the kernel */
2719 if (route
->protocol
== RTPROT_KERNEL
)
2722 /* do not touch multicast route added by kernel */
2723 /* FIXME: Why the kernel adds this route with protocol RTPROT_BOOT??? We need to investigate that.
2724 * https://tools.ietf.org/html/rfc4862#section-5.4 may explain why. */
2725 if (route
->protocol
== RTPROT_BOOT
&&
2726 route
->family
== AF_INET6
&&
2727 route
->dst_prefixlen
== 8 &&
2728 in_addr_equal(AF_INET6
, &route
->dst
, &(union in_addr_union
) { .in6
= {{{ 0xff,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0 }}} }))
2731 if (route
->protocol
== RTPROT_STATIC
&& link
->network
&&
2732 FLAGS_SET(link
->network
->keep_configuration
, KEEP_CONFIGURATION_STATIC
))
2735 if (route
->protocol
== RTPROT_DHCP
&& link
->network
&&
2736 FLAGS_SET(link
->network
->keep_configuration
, KEEP_CONFIGURATION_DHCP
))
2739 if (link_is_static_route_configured(link
, route
)) {
2740 r
= route_add(link
, route
, NULL
);
2744 r
= route_remove(route
, link
, NULL
);
2753 static int link_drop_config(Link
*link
) {
2754 Address
*address
, *pool_address
;
2760 SET_FOREACH(address
, link
->addresses
, i
) {
2761 /* we consider IPv6LL addresses to be managed by the kernel */
2762 if (address
->family
== AF_INET6
&& in_addr_is_link_local(AF_INET6
, &address
->in_addr
) == 1 && link_ipv6ll_enabled(link
))
2765 r
= address_remove(address
, link
, NULL
);
2769 /* If this address came from an address pool, clean up the pool */
2770 LIST_FOREACH(addresses
, pool_address
, link
->pool_addresses
) {
2771 if (address_equal(address
, pool_address
)) {
2772 LIST_REMOVE(addresses
, link
->pool_addresses
, pool_address
);
2773 address_free(pool_address
);
2779 SET_FOREACH(neighbor
, link
->neighbors
, i
) {
2780 r
= neighbor_remove(neighbor
, link
, NULL
);
2785 SET_FOREACH(route
, link
->routes
, i
) {
2786 /* do not touch routes managed by the kernel */
2787 if (route
->protocol
== RTPROT_KERNEL
)
2790 r
= route_remove(route
, link
, NULL
);
2800 static int link_configure_ipv4_dad(Link
*link
) {
2805 assert(link
->network
);
2807 LIST_FOREACH(addresses
, address
, link
->network
->static_addresses
)
2808 if (address
->family
== AF_INET
&&
2809 FLAGS_SET(address
->duplicate_address_detection
, ADDRESS_FAMILY_IPV4
)) {
2810 r
= configure_ipv4_duplicate_address_detection(link
, address
);
2812 return log_link_error_errno(link
, r
, "Failed to configure IPv4ACD: %m");
2818 static int link_configure_traffic_control(Link
*link
) {
2823 link
->tc_configured
= false;
2824 link
->tc_messages
= 0;
2826 ORDERED_HASHMAP_FOREACH(tc
, link
->network
->tc_by_section
, i
) {
2827 r
= traffic_control_configure(link
, tc
);
2832 if (link
->tc_messages
== 0)
2833 link
->tc_configured
= true;
2835 log_link_debug(link
, "Configuring traffic control");
2840 static int link_configure(Link
*link
) {
2844 assert(link
->network
);
2845 assert(link
->state
== LINK_STATE_INITIALIZED
);
2847 r
= link_configure_traffic_control(link
);
2851 if (link
->iftype
== ARPHRD_CAN
)
2852 return link_configure_can(link
);
2854 /* If IPv6 configured that is static IPv6 address and IPv6LL autoconfiguration is enabled
2855 * for this interface, then enable IPv6 */
2856 (void) link_update_ipv6_sysctl(link
);
2858 r
= link_set_proxy_arp(link
);
2862 r
= ipv6_proxy_ndp_addresses_configure(link
);
2866 r
= link_set_ipv4_forward(link
);
2870 r
= link_set_ipv6_forward(link
);
2874 r
= link_set_ipv6_privacy_extensions(link
);
2878 r
= link_set_ipv6_accept_ra(link
);
2882 r
= link_set_ipv6_dad_transmits(link
);
2886 r
= link_set_ipv6_hop_limit(link
);
2890 r
= link_set_ipv4_accept_local(link
);
2894 r
= link_set_flags(link
);
2898 r
= link_set_group(link
);
2902 if (link_ipv4ll_enabled(link
, ADDRESS_FAMILY_IPV4
| ADDRESS_FAMILY_FALLBACK_IPV4
)) {
2903 r
= ipv4ll_configure(link
);
2908 if (link_dhcp4_enabled(link
)) {
2909 r
= dhcp4_set_promote_secondaries(link
);
2913 r
= dhcp4_configure(link
);
2918 if (link_dhcp4_server_enabled(link
)) {
2919 r
= sd_dhcp_server_new(&link
->dhcp_server
, link
->ifindex
);
2923 r
= sd_dhcp_server_attach_event(link
->dhcp_server
, NULL
, 0);
2928 if (link_dhcp6_enabled(link
) ||
2929 link_ipv6_accept_ra_enabled(link
)) {
2930 r
= dhcp6_configure(link
);
2935 if (link_ipv6_accept_ra_enabled(link
)) {
2936 r
= ndisc_configure(link
);
2941 if (link_radv_enabled(link
)) {
2942 r
= radv_configure(link
);
2947 if (link_lldp_rx_enabled(link
)) {
2948 r
= link_lldp_rx_configure(link
);
2953 r
= link_configure_mtu(link
);
2957 r
= link_configure_addrgen_mode(link
);
2961 r
= link_configure_ipv4_dad(link
);
2965 return link_configure_continue(link
);
2968 /* The configuration continues in this separate function, instead of
2969 * including this in the above link_configure() function, for two
2971 * 1) some devices reset the link when the mtu is set, which caused
2972 * an infinite loop here in networkd; see:
2973 * https://github.com/systemd/systemd/issues/6593
2974 * https://github.com/systemd/systemd/issues/9831
2975 * 2) if ipv6ll is disabled, then bringing the interface up must be
2976 * delayed until after we get confirmation from the kernel that
2977 * the addr_gen_mode parameter has been set (via netlink), see:
2978 * https://github.com/systemd/systemd/issues/13882
2980 static int link_configure_continue(Link
*link
) {
2984 assert(link
->network
);
2985 assert(link
->state
== LINK_STATE_INITIALIZED
);
2987 if (link
->setting_mtu
|| link
->setting_genmode
)
2990 /* Drop foreign config, but ignore loopback or critical devices.
2991 * We do not want to remove loopback address or addresses used for root NFS. */
2992 if (!(link
->flags
& IFF_LOOPBACK
) &&
2993 link
->network
->keep_configuration
!= KEEP_CONFIGURATION_YES
) {
2994 r
= link_drop_foreign_config(link
);
2999 /* The kernel resets ipv6 mtu after changing device mtu;
3000 * we must set this here, after we've set device mtu */
3001 r
= link_set_ipv6_mtu(link
);
3005 if (link_has_carrier(link
) || link
->network
->configure_without_carrier
) {
3006 r
= link_acquire_conf(link
);
3011 return link_enter_join_netdev(link
);
3014 static int duid_set_uuid(DUID
*duid
, sd_id128_t uuid
) {
3017 if (duid
->raw_data_len
> 0)
3020 if (duid
->type
!= DUID_TYPE_UUID
)
3023 memcpy(&duid
->raw_data
, &uuid
, sizeof(sd_id128_t
));
3024 duid
->raw_data_len
= sizeof(sd_id128_t
);
3029 int get_product_uuid_handler(sd_bus_message
*m
, void *userdata
, sd_bus_error
*ret_error
) {
3030 Manager
*manager
= userdata
;
3031 const sd_bus_error
*e
;
3041 e
= sd_bus_message_get_error(m
);
3043 log_error_errno(sd_bus_error_get_errno(e
),
3044 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
3049 r
= sd_bus_message_read_array(m
, 'y', &a
, &sz
);
3053 if (sz
!= sizeof(sd_id128_t
)) {
3054 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
3058 memcpy(&manager
->product_uuid
, a
, sz
);
3059 while ((duid
= set_steal_first(manager
->duids_requesting_uuid
)))
3060 (void) duid_set_uuid(duid
, manager
->product_uuid
);
3062 manager
->duids_requesting_uuid
= set_free(manager
->duids_requesting_uuid
);
3065 while ((link
= set_steal_first(manager
->links_requesting_uuid
))) {
3068 r
= link_configure(link
);
3070 link_enter_failed(link
);
3073 manager
->links_requesting_uuid
= set_free(manager
->links_requesting_uuid
);
3075 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
3076 * even if the method fails. */
3077 manager
->has_product_uuid
= true;
3082 static bool link_requires_uuid(Link
*link
) {
3086 assert(link
->manager
);
3087 assert(link
->network
);
3089 duid
= link_get_duid(link
);
3090 if (duid
->type
!= DUID_TYPE_UUID
|| duid
->raw_data_len
!= 0)
3093 if (link_dhcp4_enabled(link
) && IN_SET(link
->network
->dhcp_client_identifier
, DHCP_CLIENT_ID_DUID
, DHCP_CLIENT_ID_DUID_ONLY
))
3096 if (link_dhcp6_enabled(link
) || link_ipv6_accept_ra_enabled(link
))
3102 static int link_configure_duid(Link
*link
) {
3108 assert(link
->manager
);
3109 assert(link
->network
);
3112 duid
= link_get_duid(link
);
3114 if (!link_requires_uuid(link
))
3117 if (m
->has_product_uuid
) {
3118 (void) duid_set_uuid(duid
, m
->product_uuid
);
3122 if (!m
->links_requesting_uuid
) {
3123 r
= manager_request_product_uuid(m
, link
);
3128 log_link_warning_errno(link
, r
,
3129 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
3133 r
= set_put(m
->links_requesting_uuid
, link
);
3137 r
= set_put(m
->duids_requesting_uuid
, duid
);
3147 static int link_reconfigure_internal(Link
*link
, sd_netlink_message
*m
, bool force
) {
3152 _cleanup_strv_free_
char **s
= NULL
;
3154 r
= sd_netlink_message_get_errno(m
);
3158 r
= sd_netlink_message_read_strv(m
, IFLA_PROP_LIST
, IFLA_ALT_IFNAME
, &s
);
3159 if (r
< 0 && r
!= -ENODATA
)
3162 strv_free_and_replace(link
->alternative_names
, s
);
3165 r
= network_get(link
->manager
, link
->iftype
, link
->sd_device
,
3166 link
->ifname
, link
->alternative_names
, link
->driver
,
3167 &link
->mac
, &link
->permanent_mac
,
3168 link
->wlan_iftype
, link
->ssid
, &link
->bssid
, &network
);
3170 link_enter_unmanaged(link
);
3172 } else if (r
== 0 && network
->unmanaged
) {
3173 link_enter_unmanaged(link
);
3178 if (link
->network
== network
&& !force
)
3181 log_link_info(link
, "Re-configuring with %s", network
->filename
);
3183 /* Dropping old .network file */
3184 r
= link_stop_clients(link
, false);
3188 if (link_dhcp4_server_enabled(link
))
3189 (void) sd_dhcp_server_stop(link
->dhcp_server
);
3191 r
= link_drop_config(link
);
3195 if (!IN_SET(link
->state
, LINK_STATE_UNMANAGED
, LINK_STATE_PENDING
, LINK_STATE_INITIALIZED
)) {
3196 log_link_debug(link
, "State is %s, dropping config", link_state_to_string(link
->state
));
3197 r
= link_drop_foreign_config(link
);
3202 link_free_carrier_maps(link
);
3203 link_free_engines(link
);
3204 link
->network
= network_unref(link
->network
);
3206 /* Then, apply new .network file */
3207 r
= network_apply(network
, link
);
3211 r
= link_new_carrier_maps(link
);
3215 link_set_state(link
, LINK_STATE_INITIALIZED
);
3218 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3219 * link_configure() is called later asynchronously. */
3220 r
= link_configure_duid(link
);
3224 r
= link_configure(link
);
3231 static int link_reconfigure_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
3234 r
= link_reconfigure_internal(link
, m
, false);
3236 link_enter_failed(link
);
3241 static int link_force_reconfigure_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
3244 r
= link_reconfigure_internal(link
, m
, true);
3246 link_enter_failed(link
);
3251 int link_reconfigure(Link
*link
, bool force
) {
3252 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
3255 if (IN_SET(link
->state
, LINK_STATE_PENDING
, LINK_STATE_LINGER
))
3258 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_GETLINK
,
3263 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
,
3264 force
? link_force_reconfigure_handler
: link_reconfigure_handler
,
3265 link_netlink_destroy_callback
, link
);
3274 static int link_initialized_and_synced(Link
*link
) {
3279 assert(link
->ifname
);
3280 assert(link
->manager
);
3282 /* We may get called either from the asynchronous netlink callback,
3283 * or directly for link_add() if running in a container. See link_add(). */
3284 if (!IN_SET(link
->state
, LINK_STATE_PENDING
, LINK_STATE_INITIALIZED
))
3287 log_link_debug(link
, "Link state is up-to-date");
3288 link_set_state(link
, LINK_STATE_INITIALIZED
);
3290 r
= link_new_bound_by_list(link
);
3294 r
= link_handle_bound_by_list(link
);
3298 if (!link
->network
) {
3299 r
= wifi_get_info(link
);
3303 r
= network_get(link
->manager
, link
->iftype
, link
->sd_device
,
3304 link
->ifname
, link
->alternative_names
, link
->driver
,
3305 &link
->mac
, &link
->permanent_mac
,
3306 link
->wlan_iftype
, link
->ssid
, &link
->bssid
, &network
);
3308 link_enter_unmanaged(link
);
3310 } else if (r
== 0 && network
->unmanaged
) {
3311 link_enter_unmanaged(link
);
3316 if (link
->flags
& IFF_LOOPBACK
) {
3317 if (network
->link_local
!= ADDRESS_FAMILY_NO
)
3318 log_link_debug(link
, "Ignoring link-local autoconfiguration for loopback link");
3320 if (network
->dhcp
!= ADDRESS_FAMILY_NO
)
3321 log_link_debug(link
, "Ignoring DHCP clients for loopback link");
3323 if (network
->dhcp_server
)
3324 log_link_debug(link
, "Ignoring DHCP server for loopback link");
3327 r
= network_apply(network
, link
);
3332 r
= link_new_bound_to_list(link
);
3336 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3337 * link_configure() is called later asynchronously. */
3338 r
= link_configure_duid(link
);
3342 r
= link_configure(link
);
3349 static int link_initialized_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
3350 _cleanup_strv_free_
char **s
= NULL
;
3353 r
= sd_netlink_message_get_errno(m
);
3355 log_link_warning_errno(link
, r
, "Failed to wait for the interface to be initialized: %m");
3356 link_enter_failed(link
);
3360 r
= sd_netlink_message_read_strv(m
, IFLA_PROP_LIST
, IFLA_ALT_IFNAME
, &s
);
3361 if (r
< 0 && r
!= -ENODATA
) {
3362 link_enter_failed(link
);
3366 strv_free_and_replace(link
->alternative_names
, s
);
3368 r
= link_initialized_and_synced(link
);
3370 link_enter_failed(link
);
3374 int link_initialized(Link
*link
, sd_device
*device
) {
3375 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
3379 assert(link
->manager
);
3380 assert(link
->manager
->rtnl
);
3383 if (link
->state
!= LINK_STATE_PENDING
)
3386 if (link
->sd_device
)
3389 log_link_debug(link
, "udev initialized link");
3390 link_set_state(link
, LINK_STATE_INITIALIZED
);
3392 link
->sd_device
= sd_device_ref(device
);
3394 /* udev has initialized the link, but we don't know if we have yet
3395 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3396 * when it returns we know that the pending NEWLINKs have already been
3397 * processed and that we are up-to-date */
3399 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_GETLINK
,
3404 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, link_initialized_handler
,
3405 link_netlink_destroy_callback
, link
);
3414 static int link_load(Link
*link
) {
3415 _cleanup_free_
char *network_file
= NULL
,
3418 *dhcp4_address
= NULL
,
3419 *ipv4ll_address
= NULL
;
3420 union in_addr_union address
;
3426 r
= parse_env_file(NULL
, link
->state_file
,
3427 "NETWORK_FILE", &network_file
,
3428 "ADDRESSES", &addresses
,
3430 "DHCP4_ADDRESS", &dhcp4_address
,
3431 "IPV4LL_ADDRESS", &ipv4ll_address
);
3432 if (r
< 0 && r
!= -ENOENT
)
3433 return log_link_error_errno(link
, r
, "Failed to read %s: %m", link
->state_file
);
3440 suffix
= strrchr(network_file
, '.');
3442 log_link_debug(link
, "Failed to get network name from %s", network_file
);
3443 goto network_file_fail
;
3447 r
= network_get_by_name(link
->manager
, basename(network_file
), &network
);
3449 log_link_debug_errno(link
, r
, "Failed to get network %s: %m", basename(network_file
));
3450 goto network_file_fail
;
3453 r
= network_apply(network
, link
);
3455 return log_link_error_errno(link
, r
, "Failed to apply network %s: %m", basename(network_file
));
3464 _cleanup_free_
char *address_str
= NULL
;
3465 char *prefixlen_str
;
3467 unsigned char prefixlen
;
3469 r
= extract_first_word(&p
, &address_str
, NULL
, 0);
3471 log_link_debug_errno(link
, r
, "Failed to extract next address string: %m");
3477 prefixlen_str
= strchr(address_str
, '/');
3478 if (!prefixlen_str
) {
3479 log_link_debug(link
, "Failed to parse address and prefix length %s", address_str
);
3483 *prefixlen_str
++ = '\0';
3485 r
= sscanf(prefixlen_str
, "%hhu", &prefixlen
);
3487 log_link_error(link
, "Failed to parse prefixlen %s", prefixlen_str
);
3491 r
= in_addr_from_string_auto(address_str
, &family
, &address
);
3493 log_link_debug_errno(link
, r
, "Failed to parse address %s: %m", address_str
);
3497 r
= address_add(link
, family
, &address
, prefixlen
, NULL
);
3499 return log_link_error_errno(link
, r
, "Failed to add address: %m");
3507 _cleanup_(sd_event_source_unrefp
) sd_event_source
*expire
= NULL
;
3508 _cleanup_(route_freep
) Route
*tmp
= NULL
;
3509 _cleanup_free_
char *route_str
= NULL
;
3510 char *prefixlen_str
;
3513 r
= extract_first_word(&p
, &route_str
, NULL
, 0);
3515 log_link_debug_errno(link
, r
, "Failed to extract next route string: %m");
3521 prefixlen_str
= strchr(route_str
, '/');
3522 if (!prefixlen_str
) {
3523 log_link_debug(link
, "Failed to parse route %s", route_str
);
3527 *prefixlen_str
++ = '\0';
3529 r
= route_new(&tmp
);
3533 r
= sscanf(prefixlen_str
, "%hhu/%hhu/%"SCNu32
"/%"PRIu32
"/"USEC_FMT
, &tmp
->dst_prefixlen
, &tmp
->tos
, &tmp
->priority
, &tmp
->table
, &tmp
->lifetime
);
3535 log_link_debug(link
,
3536 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3541 r
= in_addr_from_string_auto(route_str
, &tmp
->family
, &tmp
->dst
);
3543 log_link_debug_errno(link
, r
, "Failed to parse route destination %s: %m", route_str
);
3547 r
= route_add(link
, tmp
, &route
);
3549 return log_link_error_errno(link
, r
, "Failed to add route: %m");
3551 if (route
->lifetime
!= USEC_INFINITY
&& !kernel_route_expiration_supported()) {
3552 r
= sd_event_add_time(link
->manager
->event
, &expire
, clock_boottime_or_monotonic(), route
->lifetime
,
3553 0, route_expire_handler
, route
);
3555 log_link_warning_errno(link
, r
, "Could not arm route expiration handler: %m");
3558 sd_event_source_unref(route
->expire
);
3559 route
->expire
= TAKE_PTR(expire
);
3563 if (dhcp4_address
) {
3564 r
= in_addr_from_string(AF_INET
, dhcp4_address
, &address
);
3566 log_link_debug_errno(link
, r
, "Failed to parse DHCPv4 address %s: %m", dhcp4_address
);
3567 goto dhcp4_address_fail
;
3570 r
= sd_dhcp_client_new(&link
->dhcp_client
, link
->network
? link
->network
->dhcp_anonymize
: 0);
3572 return log_link_error_errno(link
, r
, "Failed to create DHCPv4 client: %m");
3574 r
= sd_dhcp_client_attach_event(link
->dhcp_client
, NULL
, 0);
3576 return log_link_error_errno(link
, r
, "Failed to attach DHCPv4 event: %m");
3578 r
= sd_dhcp_client_set_request_address(link
->dhcp_client
, &address
.in
);
3580 return log_link_error_errno(link
, r
, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address
);
3585 if (ipv4ll_address
) {
3586 r
= in_addr_from_string(AF_INET
, ipv4ll_address
, &address
);
3588 log_link_debug_errno(link
, r
, "Failed to parse IPv4LL address %s: %m", ipv4ll_address
);
3589 goto ipv4ll_address_fail
;
3592 r
= sd_ipv4ll_new(&link
->ipv4ll
);
3594 return log_link_error_errno(link
, r
, "Failed to create IPv4LL client: %m");
3596 r
= sd_ipv4ll_attach_event(link
->ipv4ll
, NULL
, 0);
3598 return log_link_error_errno(link
, r
, "Failed to attach IPv4LL event: %m");
3600 r
= sd_ipv4ll_set_address(link
->ipv4ll
, &address
.in
);
3602 return log_link_error_errno(link
, r
, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address
);
3605 ipv4ll_address_fail
:
3610 int link_add(Manager
*m
, sd_netlink_message
*message
, Link
**ret
) {
3611 _cleanup_(sd_device_unrefp
) sd_device
*device
= NULL
;
3612 char ifindex_str
[2 + DECIMAL_STR_MAX(int)];
3621 r
= link_new(m
, message
, ret
);
3627 log_link_debug(link
, "Link %d added", link
->ifindex
);
3629 r
= link_load(link
);
3633 if (path_is_read_only_fs("/sys") <= 0) {
3634 /* udev should be around */
3635 sprintf(ifindex_str
, "n%d", link
->ifindex
);
3636 r
= sd_device_new_from_device_id(&device
, ifindex_str
);
3638 log_link_warning_errno(link
, r
, "Could not find device, waiting for device initialization: %m");
3642 r
= sd_device_get_is_initialized(device
);
3644 log_link_warning_errno(link
, r
, "Could not determine whether the device is initialized: %m");
3649 log_link_debug(link
, "link pending udev initialization...");
3653 r
= device_is_renaming(device
);
3655 log_link_warning_errno(link
, r
, "Failed to determine the device is being renamed: %m");
3659 log_link_debug(link
, "Interface is being renamed, pending initialization.");
3663 r
= link_initialized(link
, device
);
3667 r
= link_initialized_and_synced(link
);
3674 link_enter_failed(link
);
3678 int link_ipv6ll_gained(Link
*link
, const struct in6_addr
*address
) {
3683 log_link_info(link
, "Gained IPv6LL");
3685 link
->ipv6ll_address
= *address
;
3686 link_check_ready(link
);
3688 if (IN_SET(link
->state
, LINK_STATE_CONFIGURING
, LINK_STATE_CONFIGURED
)) {
3689 r
= link_acquire_ipv6_conf(link
);
3691 link_enter_failed(link
);
3699 static int link_carrier_gained(Link
*link
) {
3704 r
= wifi_get_info(link
);
3708 r
= link_reconfigure_internal(link
, NULL
, false);
3710 link_enter_failed(link
);
3715 if (IN_SET(link
->state
, LINK_STATE_CONFIGURING
, LINK_STATE_CONFIGURED
)) {
3716 r
= link_acquire_conf(link
);
3718 link_enter_failed(link
);
3722 link_set_state(link
, LINK_STATE_CONFIGURING
);
3723 r
= link_request_set_addresses(link
);
3728 r
= link_handle_bound_by_list(link
);
3735 static int link_carrier_lost(Link
*link
) {
3740 if (link
->network
&& link
->network
->ignore_carrier_loss
)
3743 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
3744 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3745 * configuration and stop the clients as well. */
3746 if (link
->setting_mtu
)
3749 r
= link_stop_clients(link
, false);
3751 link_enter_failed(link
);
3755 if (link_dhcp4_server_enabled(link
))
3756 (void) sd_dhcp_server_stop(link
->dhcp_server
);
3758 r
= link_drop_config(link
);
3762 if (!IN_SET(link
->state
, LINK_STATE_UNMANAGED
, LINK_STATE_PENDING
, LINK_STATE_INITIALIZED
)) {
3763 log_link_debug(link
, "State is %s, dropping config", link_state_to_string(link
->state
));
3764 r
= link_drop_foreign_config(link
);
3769 r
= link_handle_bound_by_list(link
);
3776 int link_carrier_reset(Link
*link
) {
3781 if (link_has_carrier(link
)) {
3782 r
= link_carrier_lost(link
);
3786 r
= link_carrier_gained(link
);
3790 log_link_info(link
, "Reset carrier");
3796 /* This is called every time an interface admin state changes to up;
3797 * specifically, when IFF_UP flag changes from unset to set */
3798 static int link_admin_state_up(Link
*link
) {
3801 /* We set the ipv6 mtu after the device mtu, but the kernel resets
3802 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
3803 * ipv6_mtu_set prevents this from trying to set it too early before
3804 * the link->network has been setup; we only need to reset it
3805 * here if we've already set it during normal initialization. */
3806 if (link
->ipv6_mtu_set
) {
3807 r
= link_set_ipv6_mtu(link
);
3815 int link_update(Link
*link
, sd_netlink_message
*m
) {
3816 _cleanup_strv_free_
char **s
= NULL
;
3817 struct ether_addr mac
;
3820 bool had_carrier
, carrier_gained
, carrier_lost
, link_was_admin_up
;
3824 assert(link
->ifname
);
3827 if (link
->state
== LINK_STATE_LINGER
) {
3828 log_link_info(link
, "Link re-added");
3829 link_set_state(link
, LINK_STATE_CONFIGURING
);
3831 r
= link_new_carrier_maps(link
);
3836 r
= sd_netlink_message_read_string(m
, IFLA_IFNAME
, &ifname
);
3837 if (r
>= 0 && !streq(ifname
, link
->ifname
)) {
3838 Manager
*manager
= link
->manager
;
3840 log_link_info(link
, "Interface name change detected, %s has been renamed to %s.", link
->ifname
, ifname
);
3843 r
= link_add(manager
, m
, &link
);
3848 r
= sd_netlink_message_read_strv(m
, IFLA_PROP_LIST
, IFLA_ALT_IFNAME
, &s
);
3850 strv_free_and_replace(link
->alternative_names
, s
);
3852 r
= sd_netlink_message_read_u32(m
, IFLA_MTU
, &mtu
);
3853 if (r
>= 0 && mtu
> 0) {
3855 if (link
->original_mtu
== 0) {
3856 link
->original_mtu
= mtu
;
3857 log_link_debug(link
, "Saved original MTU: %" PRIu32
, link
->original_mtu
);
3860 if (link
->dhcp_client
) {
3861 r
= sd_dhcp_client_set_mtu(link
->dhcp_client
,
3864 return log_link_warning_errno(link
, r
, "Could not update MTU in DHCP client: %m");
3868 r
= sd_radv_set_mtu(link
->radv
, link
->mtu
);
3870 return log_link_warning_errno(link
, r
, "Could not set MTU for Router Advertisement: %m");
3874 /* The kernel may broadcast NEWLINK messages without the MAC address
3875 set, simply ignore them. */
3876 r
= sd_netlink_message_read_ether_addr(m
, IFLA_ADDRESS
, &mac
);
3878 if (memcmp(link
->mac
.ether_addr_octet
, mac
.ether_addr_octet
,
3881 memcpy(link
->mac
.ether_addr_octet
, mac
.ether_addr_octet
,
3884 log_link_debug(link
, "MAC address: "
3885 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3886 mac
.ether_addr_octet
[0],
3887 mac
.ether_addr_octet
[1],
3888 mac
.ether_addr_octet
[2],
3889 mac
.ether_addr_octet
[3],
3890 mac
.ether_addr_octet
[4],
3891 mac
.ether_addr_octet
[5]);
3894 r
= sd_ipv4ll_set_mac(link
->ipv4ll
, &link
->mac
);
3896 return log_link_warning_errno(link
, r
, "Could not update MAC address in IPv4LL client: %m");
3899 if (link
->dhcp_client
) {
3900 r
= sd_dhcp_client_set_mac(link
->dhcp_client
,
3901 (const uint8_t *) &link
->mac
,
3905 return log_link_warning_errno(link
, r
, "Could not update MAC address in DHCP client: %m");
3907 r
= dhcp4_set_client_identifier(link
);
3912 if (link
->dhcp6_client
) {
3913 const DUID
* duid
= link_get_duid(link
);
3915 r
= sd_dhcp6_client_set_mac(link
->dhcp6_client
,
3916 (const uint8_t *) &link
->mac
,
3920 return log_link_warning_errno(link
, r
, "Could not update MAC address in DHCPv6 client: %m");
3922 if (link
->network
->iaid_set
) {
3923 r
= sd_dhcp6_client_set_iaid(link
->dhcp6_client
,
3924 link
->network
->iaid
);
3926 return log_link_warning_errno(link
, r
, "Could not update DHCPv6 IAID: %m");
3929 r
= sd_dhcp6_client_set_duid(link
->dhcp6_client
,
3931 duid
->raw_data_len
> 0 ? duid
->raw_data
: NULL
,
3932 duid
->raw_data_len
);
3934 return log_link_warning_errno(link
, r
, "Could not update DHCPv6 DUID: %m");
3938 r
= sd_radv_set_mac(link
->radv
, &link
->mac
);
3940 return log_link_warning_errno(link
, r
, "Could not update MAC for Router Advertisement: %m");
3944 r
= sd_ndisc_set_mac(link
->ndisc
, &link
->mac
);
3946 return log_link_warning_errno(link
, r
, "Could not update MAC for ndisc: %m");
3951 old_master
= link
->master_ifindex
;
3952 (void) sd_netlink_message_read_u32(m
, IFLA_MASTER
, (uint32_t *) &link
->master_ifindex
);
3954 link_was_admin_up
= link
->flags
& IFF_UP
;
3955 had_carrier
= link_has_carrier(link
);
3957 r
= link_update_flags(link
, m
, old_master
!= link
->master_ifindex
);
3961 if (!link_was_admin_up
&& (link
->flags
& IFF_UP
)) {
3962 log_link_info(link
, "Link UP");
3964 r
= link_admin_state_up(link
);
3967 } else if (link_was_admin_up
&& !(link
->flags
& IFF_UP
))
3968 log_link_info(link
, "Link DOWN");
3970 r
= link_update_lldp(link
);
3974 carrier_gained
= !had_carrier
&& link_has_carrier(link
);
3975 carrier_lost
= had_carrier
&& !link_has_carrier(link
);
3977 if (carrier_gained
) {
3978 log_link_info(link
, "Gained carrier");
3980 r
= link_carrier_gained(link
);
3983 } else if (carrier_lost
) {
3984 log_link_info(link
, "Lost carrier");
3986 r
= link_carrier_lost(link
);
3994 static void print_link_hashmap(FILE *f
, const char *prefix
, Hashmap
* h
) {
4002 if (hashmap_isempty(h
))
4006 HASHMAP_FOREACH(link
, h
, i
) {
4010 fprintf(f
, "%i", link
->ifindex
);
4017 static void link_save_dns(FILE *f
, struct in_addr_data
*dns
, unsigned n_dns
, bool *space
) {
4018 for (unsigned j
= 0; j
< n_dns
; j
++) {
4019 _cleanup_free_
char *b
= NULL
;
4022 r
= in_addr_to_string(dns
[j
].family
, &dns
[j
].address
, &b
);
4024 log_debug_errno(r
, "Failed to format address, ignoring: %m");
4035 static void serialize_addresses(
4040 sd_dhcp_lease
*lease
,
4042 sd_dhcp_lease_server_type what
,
4043 sd_dhcp6_lease
*lease6
,
4045 int (*lease6_get_addr
)(sd_dhcp6_lease
*, const struct in6_addr
**),
4046 int (*lease6_get_fqdn
)(sd_dhcp6_lease
*, char ***)) {
4049 bool _space
= false;
4054 fprintf(f
, "%s=", lvalue
);
4055 fputstrv(f
, addresses
, NULL
, space
);
4057 if (lease
&& conditional
) {
4058 const struct in_addr
*lease_addresses
;
4060 r
= sd_dhcp_lease_get_servers(lease
, what
, &lease_addresses
);
4062 serialize_in_addrs(f
, lease_addresses
, r
, space
, in4_addr_is_non_local
);
4065 if (lease6
&& conditional6
&& lease6_get_addr
) {
4066 const struct in6_addr
*in6_addrs
;
4068 r
= lease6_get_addr(lease6
, &in6_addrs
);
4070 serialize_in6_addrs(f
, in6_addrs
, r
, space
);
4073 if (lease6
&& conditional6
&& lease6_get_fqdn
) {
4076 r
= lease6_get_fqdn(lease6
, &in6_hosts
);
4078 fputstrv(f
, in6_hosts
, NULL
, space
);
4085 int link_save(Link
*link
) {
4086 const char *admin_state
, *oper_state
, *carrier_state
, *address_state
;
4087 _cleanup_free_
char *temp_path
= NULL
;
4088 _cleanup_fclose_
FILE *f
= NULL
;
4095 assert(link
->state_file
);
4096 assert(link
->lease_file
);
4097 assert(link
->manager
);
4099 if (link
->state
== LINK_STATE_LINGER
) {
4100 (void) unlink(link
->state_file
);
4104 link_lldp_save(link
);
4106 admin_state
= link_state_to_string(link
->state
);
4107 assert(admin_state
);
4109 oper_state
= link_operstate_to_string(link
->operstate
);
4112 carrier_state
= link_carrier_state_to_string(link
->carrier_state
);
4113 assert(carrier_state
);
4115 address_state
= link_address_state_to_string(link
->address_state
);
4116 assert(address_state
);
4118 r
= fopen_temporary(link
->state_file
, &f
, &temp_path
);
4122 (void) fchmod(fileno(f
), 0644);
4125 "# This is private data. Do not parse.\n"
4128 "CARRIER_STATE=%s\n"
4129 "ADDRESS_STATE=%s\n",
4130 admin_state
, oper_state
, carrier_state
, address_state
);
4132 if (link
->network
) {
4133 char **dhcp6_domains
= NULL
, **dhcp_domains
= NULL
;
4134 const char *dhcp_domainname
= NULL
, *p
;
4135 sd_dhcp6_lease
*dhcp6_lease
= NULL
;
4138 fprintf(f
, "REQUIRED_FOR_ONLINE=%s\n",
4139 yes_no(link
->network
->required_for_online
));
4141 LinkOperationalStateRange st
= link
->network
->required_operstate_for_online
;
4142 fprintf(f
, "REQUIRED_OPER_STATE_FOR_ONLINE=%s%s%s\n",
4143 strempty(link_operstate_to_string(st
.min
)),
4144 st
.max
!= LINK_OPERSTATE_RANGE_DEFAULT
.max
? ":" : "",
4145 st
.max
!= LINK_OPERSTATE_RANGE_DEFAULT
.max
? strempty(link_operstate_to_string(st
.max
)) : "");
4147 if (link
->dhcp6_client
) {
4148 r
= sd_dhcp6_client_get_lease(link
->dhcp6_client
, &dhcp6_lease
);
4149 if (r
< 0 && r
!= -ENOMSG
)
4150 log_link_debug_errno(link
, r
, "Failed to get DHCPv6 lease: %m");
4153 fprintf(f
, "NETWORK_FILE=%s\n", link
->network
->filename
);
4155 /************************************************************/
4159 if (link
->n_dns
!= (unsigned) -1)
4160 link_save_dns(f
, link
->dns
, link
->n_dns
, &space
);
4162 link_save_dns(f
, link
->network
->dns
, link
->network
->n_dns
, &space
);
4164 serialize_addresses(f
, NULL
, &space
,
4167 link
->network
->dhcp_use_dns
,
4170 link
->network
->dhcp6_use_dns
,
4171 sd_dhcp6_lease_get_dns
,
4174 /* Make sure to flush out old entries before we use the NDISC data */
4177 if (link
->network
->ipv6_accept_ra_use_dns
&& link
->ndisc_rdnss
) {
4180 SET_FOREACH(dd
, link
->ndisc_rdnss
, i
)
4181 serialize_in6_addrs(f
, &dd
->address
, 1, &space
);
4186 /************************************************************/
4188 serialize_addresses(f
, "NTP", NULL
,
4189 link
->ntp
?: link
->network
->ntp
,
4191 link
->network
->dhcp_use_ntp
,
4194 link
->network
->dhcp6_use_ntp
,
4195 sd_dhcp6_lease_get_ntp_addrs
,
4196 sd_dhcp6_lease_get_ntp_fqdn
);
4198 serialize_addresses(f
, "SIP", NULL
,
4201 link
->network
->dhcp_use_sip
,
4203 false, NULL
, NULL
, NULL
);
4205 serialize_addresses(f
, "POP3", NULL
,
4206 link
->network
->pop3
,
4210 false, NULL
, NULL
, NULL
);
4212 serialize_addresses(f
, "SMTP", NULL
,
4213 link
->network
->smtp
,
4217 false, NULL
, NULL
, NULL
);
4219 serialize_addresses(f
, "LPR", NULL
,
4224 false, NULL
, NULL
, NULL
);
4226 /************************************************************/
4228 if (link
->network
->dhcp_use_domains
!= DHCP_USE_DOMAINS_NO
) {
4229 if (link
->dhcp_lease
) {
4230 (void) sd_dhcp_lease_get_domainname(link
->dhcp_lease
, &dhcp_domainname
);
4231 (void) sd_dhcp_lease_get_search_domains(link
->dhcp_lease
, &dhcp_domains
);
4234 (void) sd_dhcp6_lease_get_domains(dhcp6_lease
, &dhcp6_domains
);
4237 fputs("DOMAINS=", f
);
4239 ORDERED_SET_FOREACH(p
, link
->search_domains
?: link
->network
->search_domains
, i
)
4240 fputs_with_space(f
, p
, NULL
, &space
);
4242 if (link
->network
->dhcp_use_domains
== DHCP_USE_DOMAINS_YES
) {
4243 if (dhcp_domainname
)
4244 fputs_with_space(f
, dhcp_domainname
, NULL
, &space
);
4246 fputstrv(f
, dhcp_domains
, NULL
, &space
);
4248 fputstrv(f
, dhcp6_domains
, NULL
, &space
);
4251 if (link
->network
->ipv6_accept_ra_use_domains
== DHCP_USE_DOMAINS_YES
) {
4254 SET_FOREACH(dd
, link
->ndisc_dnssl
, i
)
4255 fputs_with_space(f
, NDISC_DNSSL_DOMAIN(dd
), NULL
, &space
);
4260 /************************************************************/
4262 fputs("ROUTE_DOMAINS=", f
);
4264 ORDERED_SET_FOREACH(p
, link
->route_domains
?: link
->network
->route_domains
, i
)
4265 fputs_with_space(f
, p
, NULL
, &space
);
4267 if (link
->network
->dhcp_use_domains
== DHCP_USE_DOMAINS_ROUTE
) {
4268 if (dhcp_domainname
)
4269 fputs_with_space(f
, dhcp_domainname
, NULL
, &space
);
4271 fputstrv(f
, dhcp_domains
, NULL
, &space
);
4273 fputstrv(f
, dhcp6_domains
, NULL
, &space
);
4276 if (link
->network
->ipv6_accept_ra_use_domains
== DHCP_USE_DOMAINS_ROUTE
) {
4279 SET_FOREACH(dd
, link
->ndisc_dnssl
, i
)
4280 fputs_with_space(f
, NDISC_DNSSL_DOMAIN(dd
), NULL
, &space
);
4285 /************************************************************/
4287 fprintf(f
, "LLMNR=%s\n",
4288 resolve_support_to_string(link
->llmnr
>= 0 ? link
->llmnr
: link
->network
->llmnr
));
4290 /************************************************************/
4292 fprintf(f
, "MDNS=%s\n",
4293 resolve_support_to_string(link
->mdns
>= 0 ? link
->mdns
: link
->network
->mdns
));
4295 /************************************************************/
4297 int dns_default_route
=
4298 link
->dns_default_route
>= 0 ? link
->dns_default_route
:
4299 link
->network
->dns_default_route
;
4300 if (dns_default_route
>= 0)
4301 fprintf(f
, "DNS_DEFAULT_ROUTE=%s\n", yes_no(dns_default_route
));
4303 /************************************************************/
4305 DnsOverTlsMode dns_over_tls_mode
=
4306 link
->dns_over_tls_mode
!= _DNS_OVER_TLS_MODE_INVALID
? link
->dns_over_tls_mode
:
4307 link
->network
->dns_over_tls_mode
;
4308 if (dns_over_tls_mode
!= _DNS_OVER_TLS_MODE_INVALID
)
4309 fprintf(f
, "DNS_OVER_TLS=%s\n", dns_over_tls_mode_to_string(dns_over_tls_mode
));
4311 /************************************************************/
4313 DnssecMode dnssec_mode
=
4314 link
->dnssec_mode
!= _DNSSEC_MODE_INVALID
? link
->dnssec_mode
:
4315 link
->network
->dnssec_mode
;
4316 if (dnssec_mode
!= _DNSSEC_MODE_INVALID
)
4317 fprintf(f
, "DNSSEC=%s\n", dnssec_mode_to_string(dnssec_mode
));
4319 /************************************************************/
4321 Set
*nta_anchors
= link
->dnssec_negative_trust_anchors
;
4322 if (set_isempty(nta_anchors
))
4323 nta_anchors
= link
->network
->dnssec_negative_trust_anchors
;
4325 if (!set_isempty(nta_anchors
)) {
4328 fputs("DNSSEC_NTA=", f
);
4330 SET_FOREACH(n
, nta_anchors
, i
)
4331 fputs_with_space(f
, n
, NULL
, &space
);
4335 /************************************************************/
4337 fputs("ADDRESSES=", f
);
4339 SET_FOREACH(a
, link
->addresses
, i
) {
4340 _cleanup_free_
char *address_str
= NULL
;
4342 r
= in_addr_to_string(a
->family
, &a
->in_addr
, &address_str
);
4346 fprintf(f
, "%s%s/%u", space
? " " : "", address_str
, a
->prefixlen
);
4351 /************************************************************/
4353 fputs("ROUTES=", f
);
4355 SET_FOREACH(route
, link
->routes
, i
) {
4356 _cleanup_free_
char *route_str
= NULL
;
4358 r
= in_addr_to_string(route
->family
, &route
->dst
, &route_str
);
4362 fprintf(f
, "%s%s/%hhu/%hhu/%"PRIu32
"/%"PRIu32
"/"USEC_FMT
,
4363 space
? " " : "", route_str
,
4364 route
->dst_prefixlen
, route
->tos
, route
->priority
, route
->table
, route
->lifetime
);
4371 print_link_hashmap(f
, "CARRIER_BOUND_TO=", link
->bound_to_links
);
4372 print_link_hashmap(f
, "CARRIER_BOUND_BY=", link
->bound_by_links
);
4374 if (link
->dhcp_lease
) {
4375 struct in_addr address
;
4376 const char *tz
= NULL
;
4377 size_t client_id_len
;
4378 const void *client_id
;
4380 assert(link
->network
);
4382 r
= sd_dhcp_lease_get_timezone(link
->dhcp_lease
, &tz
);
4384 fprintf(f
, "TIMEZONE=%s\n", tz
);
4386 r
= sd_dhcp_lease_get_address(link
->dhcp_lease
, &address
);
4388 fputs("DHCP4_ADDRESS=", f
);
4389 serialize_in_addrs(f
, &address
, 1, NULL
, NULL
);
4393 r
= sd_dhcp_lease_get_client_id(link
->dhcp_lease
, &client_id
, &client_id_len
);
4395 _cleanup_free_
char *id
= NULL
;
4397 r
= sd_dhcp_client_id_to_string(client_id
, client_id_len
, &id
);
4399 fprintf(f
, "DHCP4_CLIENT_ID=%s\n", id
);
4402 r
= dhcp_lease_save(link
->dhcp_lease
, link
->lease_file
);
4410 (void) unlink(link
->lease_file
);
4413 struct in_addr address
;
4415 r
= sd_ipv4ll_get_address(link
->ipv4ll
, &address
);
4417 fputs("IPV4LL_ADDRESS=", f
);
4418 serialize_in_addrs(f
, &address
, 1, false, NULL
);
4423 if (link
->dhcp6_client
) {
4424 _cleanup_free_
char *duid
= NULL
;
4427 r
= sd_dhcp6_client_get_iaid(link
->dhcp6_client
, &iaid
);
4429 fprintf(f
, "DHCP6_CLIENT_IAID=0x%x\n", iaid
);
4431 r
= sd_dhcp6_client_duid_as_string(link
->dhcp6_client
, &duid
);
4433 fprintf(f
, "DHCP6_CLIENT_DUID=%s\n", duid
);
4436 r
= fflush_and_check(f
);
4440 if (rename(temp_path
, link
->state_file
) < 0) {
4448 (void) unlink(link
->state_file
);
4450 (void) unlink(temp_path
);
4452 return log_link_error_errno(link
, r
, "Failed to save link data to %s: %m", link
->state_file
);
4455 /* The serialized state in /run is no longer up-to-date. */
4456 void link_dirty(Link
*link
) {
4461 /* mark manager dirty as link is dirty */
4462 manager_dirty(link
->manager
);
4464 r
= set_ensure_allocated(&link
->manager
->dirty_links
, NULL
);
4466 /* allocation errors are ignored */
4469 r
= set_put(link
->manager
->dirty_links
, link
);
4471 /* don't take another ref if the link was already dirty */
4477 /* The serialized state in /run is up-to-date */
4478 void link_clean(Link
*link
) {
4480 assert(link
->manager
);
4482 link_unref(set_remove(link
->manager
->dirty_links
, link
));
4485 static const char* const link_ipv6_address_gen_mode_table
[_LINK_IPV6_ADDRESS_GEN_MODE_MAX
] = {
4486 [LINK_IPV6_ADDRESSS_GEN_MODE_EUI64
] = "eui64",
4487 [LINK_IPV6_ADDRESSS_GEN_MODE_NONE
] = "none",
4488 [LINK_IPV6_ADDRESSS_GEN_MODE_STABLE_PRIVACY
] = "stable-privacy",
4489 [LINK_IPV6_ADDRESSS_GEN_MODE_RANDOM
] = "random",
4492 DEFINE_STRING_TABLE_LOOKUP(link_ipv6_address_gen_mode
, LinkIPv6AddressGenMode
);
4493 DEFINE_CONFIG_PARSE_ENUM(config_parse_link_ipv6_address_gen_mode
, link_ipv6_address_gen_mode
, LinkIPv6AddressGenMode
, "Failed to parse link IPv6 address generation mode");
4495 static const char* const link_state_table
[_LINK_STATE_MAX
] = {
4496 [LINK_STATE_PENDING
] = "pending",
4497 [LINK_STATE_INITIALIZED
] = "initialized",
4498 [LINK_STATE_CONFIGURING
] = "configuring",
4499 [LINK_STATE_CONFIGURED
] = "configured",
4500 [LINK_STATE_UNMANAGED
] = "unmanaged",
4501 [LINK_STATE_FAILED
] = "failed",
4502 [LINK_STATE_LINGER
] = "linger",
4505 DEFINE_STRING_TABLE_LOOKUP(link_state
, LinkState
);
4507 int log_link_message_full_errno(Link
*link
, sd_netlink_message
*m
, int level
, int err
, const char *msg
) {
4508 const char *err_msg
= NULL
;
4510 (void) sd_netlink_message_read_string(m
, NLMSGERR_ATTR_MSG
, &err_msg
);
4511 return log_link_full(link
, level
, err
,
4515 err_msg
&& !endswith(err_msg
, ".") ? "." : "",
4516 err_msg
? " " : "");