1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 #include <netinet/in.h>
5 #include <linux/if_arp.h>
6 #include <linux/if_link.h>
9 #include "alloc-util.h"
13 #include "dhcp-identifier.h"
14 #include "dhcp-lease-internal.h"
16 #include "ethtool-util.h"
20 #include "missing_network.h"
21 #include "netlink-util.h"
22 #include "network-internal.h"
23 #include "networkd-can.h"
24 #include "networkd-dhcp-server.h"
25 #include "networkd-dhcp4.h"
26 #include "networkd-dhcp6.h"
27 #include "networkd-ipv4ll.h"
28 #include "networkd-ipv6-proxy-ndp.h"
29 #include "networkd-link-bus.h"
30 #include "networkd-link.h"
31 #include "networkd-lldp-tx.h"
32 #include "networkd-manager.h"
33 #include "networkd-ndisc.h"
34 #include "networkd-neighbor.h"
35 #include "networkd-sriov.h"
36 #include "networkd-radv.h"
37 #include "networkd-routing-policy-rule.h"
38 #include "networkd-wifi.h"
40 #include "socket-util.h"
41 #include "stat-util.h"
42 #include "stdio-util.h"
43 #include "string-table.h"
45 #include "sysctl-util.h"
47 #include "tmpfile-util.h"
48 #include "udev-util.h"
52 uint32_t link_get_vrf_table(Link
*link
) {
53 return link
->network
->vrf
? VRF(link
->network
->vrf
)->table
: RT_TABLE_MAIN
;
56 uint32_t link_get_dhcp_route_table(Link
*link
) {
57 /* When the interface is part of an VRF use the VRFs routing table, unless
58 * another table is explicitly specified. */
59 if (link
->network
->dhcp_route_table_set
)
60 return link
->network
->dhcp_route_table
;
61 return link_get_vrf_table(link
);
64 uint32_t link_get_ipv6_accept_ra_route_table(Link
*link
) {
65 if (link
->network
->ipv6_accept_ra_route_table_set
)
66 return link
->network
->ipv6_accept_ra_route_table
;
67 return link_get_vrf_table(link
);
70 DUID
* link_get_duid(Link
*link
) {
71 if (link
->network
->duid
.type
!= _DUID_TYPE_INVALID
)
72 return &link
->network
->duid
;
74 return &link
->manager
->duid
;
77 static bool link_dhcp6_enabled(Link
*link
) {
80 if (!socket_ipv6_is_supported())
83 if (link
->flags
& IFF_LOOPBACK
)
89 if (link
->network
->bond
)
92 if (link
->iftype
== ARPHRD_CAN
)
95 return link
->network
->dhcp
& ADDRESS_FAMILY_IPV6
;
98 static bool link_dhcp4_enabled(Link
*link
) {
101 if (link
->flags
& IFF_LOOPBACK
)
107 if (link
->network
->bond
)
110 if (link
->iftype
== ARPHRD_CAN
)
113 return link
->network
->dhcp
& ADDRESS_FAMILY_IPV4
;
116 static bool link_dhcp4_server_enabled(Link
*link
) {
119 if (link
->flags
& IFF_LOOPBACK
)
125 if (link
->network
->bond
)
128 if (link
->iftype
== ARPHRD_CAN
)
131 return link
->network
->dhcp_server
;
134 bool link_ipv4ll_enabled(Link
*link
, AddressFamily mask
) {
136 assert((mask
& ~(ADDRESS_FAMILY_IPV4
| ADDRESS_FAMILY_FALLBACK_IPV4
)) == 0);
138 if (link
->flags
& IFF_LOOPBACK
)
144 if (link
->iftype
== ARPHRD_CAN
)
147 if (STRPTR_IN_SET(link
->kind
,
148 "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
149 "vti6", "nlmon", "xfrm"))
152 /* L3 or L3S mode do not support ARP. */
153 if (IN_SET(link_get_ipvlan_mode(link
), NETDEV_IPVLAN_MODE_L3
, NETDEV_IPVLAN_MODE_L3S
))
156 if (link
->network
->bond
)
159 return link
->network
->link_local
& mask
;
162 static bool link_ipv6ll_enabled(Link
*link
) {
165 if (!socket_ipv6_is_supported())
168 if (link
->flags
& IFF_LOOPBACK
)
174 if (link
->iftype
== ARPHRD_CAN
)
177 if (STRPTR_IN_SET(link
->kind
, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon"))
180 if (link
->network
->bond
)
183 return link
->network
->link_local
& ADDRESS_FAMILY_IPV6
;
186 static bool link_ipv6_enabled(Link
*link
) {
189 if (!socket_ipv6_is_supported())
192 if (link
->network
->bond
)
195 if (link
->iftype
== ARPHRD_CAN
)
198 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
199 if (link_ipv6ll_enabled(link
))
202 if (network_has_static_ipv6_configurations(link
->network
))
208 static bool link_radv_enabled(Link
*link
) {
211 if (!link_ipv6ll_enabled(link
))
214 return link
->network
->router_prefix_delegation
!= RADV_PREFIX_DELEGATION_NONE
;
217 static bool link_ipv4_forward_enabled(Link
*link
) {
220 if (link
->flags
& IFF_LOOPBACK
)
226 if (link
->network
->ip_forward
== _ADDRESS_FAMILY_INVALID
)
229 return link
->network
->ip_forward
& ADDRESS_FAMILY_IPV4
;
232 static bool link_ipv6_forward_enabled(Link
*link
) {
235 if (!socket_ipv6_is_supported())
238 if (link
->flags
& IFF_LOOPBACK
)
244 if (link
->network
->ip_forward
== _ADDRESS_FAMILY_INVALID
)
247 return link
->network
->ip_forward
& ADDRESS_FAMILY_IPV6
;
250 static bool link_proxy_arp_enabled(Link
*link
) {
253 if (link
->flags
& IFF_LOOPBACK
)
259 if (link
->network
->proxy_arp
< 0)
265 static bool link_ipv6_accept_ra_enabled(Link
*link
) {
268 if (!socket_ipv6_is_supported())
271 if (link
->flags
& IFF_LOOPBACK
)
277 if (!link_ipv6ll_enabled(link
))
280 /* If unset use system default (enabled if local forwarding is disabled.
281 * disabled if local forwarding is enabled).
282 * If set, ignore or enforce RA independent of local forwarding state.
284 if (link
->network
->ipv6_accept_ra
< 0)
285 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
286 return !link_ipv6_forward_enabled(link
);
287 else if (link
->network
->ipv6_accept_ra
> 0)
288 /* accept RA even if ip_forward is enabled */
295 static IPv6PrivacyExtensions
link_ipv6_privacy_extensions(Link
*link
) {
298 if (!socket_ipv6_is_supported())
299 return _IPV6_PRIVACY_EXTENSIONS_INVALID
;
301 if (link
->flags
& IFF_LOOPBACK
)
302 return _IPV6_PRIVACY_EXTENSIONS_INVALID
;
305 return _IPV6_PRIVACY_EXTENSIONS_INVALID
;
307 return link
->network
->ipv6_privacy_extensions
;
310 static int link_update_ipv6_sysctl(Link
*link
) {
314 if (link
->flags
& IFF_LOOPBACK
)
317 enabled
= link_ipv6_enabled(link
);
319 r
= sysctl_write_ip_property_boolean(AF_INET6
, link
->ifname
, "disable_ipv6", false);
321 return log_link_warning_errno(link
, r
, "Cannot enable IPv6: %m");
323 log_link_info(link
, "IPv6 successfully enabled");
329 static bool link_is_enslaved(Link
*link
) {
330 if (link
->flags
& IFF_SLAVE
)
331 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
337 if (link
->master_ifindex
> 0 && link
->network
->bridge
)
340 /* TODO: add conditions for other netdevs. */
345 static void link_update_master_operstate(Link
*link
, NetDev
*netdev
) {
351 if (netdev
->ifindex
<= 0)
354 if (link_get(link
->manager
, netdev
->ifindex
, &master
) < 0)
357 link_update_operstate(master
, true);
360 void link_update_operstate(Link
*link
, bool also_update_master
) {
361 LinkOperationalState operstate
;
362 LinkCarrierState carrier_state
;
363 LinkAddressState address_state
;
364 _cleanup_strv_free_
char **p
= NULL
;
365 uint8_t scope
= RT_SCOPE_NOWHERE
;
366 bool changed
= false;
371 if (link
->kernel_operstate
== IF_OPER_DORMANT
)
372 carrier_state
= LINK_CARRIER_STATE_DORMANT
;
373 else if (link_has_carrier(link
)) {
374 if (link_is_enslaved(link
))
375 carrier_state
= LINK_CARRIER_STATE_ENSLAVED
;
377 carrier_state
= LINK_CARRIER_STATE_CARRIER
;
378 } else if (link
->flags
& IFF_UP
)
379 carrier_state
= LINK_CARRIER_STATE_NO_CARRIER
;
381 carrier_state
= LINK_CARRIER_STATE_OFF
;
383 if (carrier_state
>= LINK_CARRIER_STATE_CARRIER
) {
386 SET_FOREACH(slave
, link
->slaves
) {
387 link_update_operstate(slave
, false);
389 if (slave
->carrier_state
< LINK_CARRIER_STATE_CARRIER
)
390 carrier_state
= LINK_CARRIER_STATE_DEGRADED_CARRIER
;
394 SET_FOREACH(address
, link
->addresses
) {
395 if (!address_is_ready(address
))
398 if (address
->scope
< scope
)
399 scope
= address
->scope
;
402 /* for operstate we also take foreign addresses into account */
403 SET_FOREACH(address
, link
->addresses_foreign
) {
404 if (!address_is_ready(address
))
407 if (address
->scope
< scope
)
408 scope
= address
->scope
;
411 if (scope
< RT_SCOPE_SITE
)
412 /* universally accessible addresses found */
413 address_state
= LINK_ADDRESS_STATE_ROUTABLE
;
414 else if (scope
< RT_SCOPE_HOST
)
415 /* only link or site local addresses found */
416 address_state
= LINK_ADDRESS_STATE_DEGRADED
;
418 /* no useful addresses found */
419 address_state
= LINK_ADDRESS_STATE_OFF
;
421 /* Mapping of address and carrier state vs operational state
423 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
424 * ------------------------------------------------------------------------------
425 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
426 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
427 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
430 if (carrier_state
< LINK_CARRIER_STATE_CARRIER
|| address_state
== LINK_ADDRESS_STATE_OFF
)
431 operstate
= (LinkOperationalState
) carrier_state
;
432 else if (address_state
== LINK_ADDRESS_STATE_ROUTABLE
)
433 operstate
= LINK_OPERSTATE_ROUTABLE
;
434 else if (carrier_state
== LINK_CARRIER_STATE_CARRIER
)
435 operstate
= LINK_OPERSTATE_DEGRADED
;
437 operstate
= LINK_OPERSTATE_ENSLAVED
;
439 if (link
->carrier_state
!= carrier_state
) {
440 link
->carrier_state
= carrier_state
;
442 if (strv_extend(&p
, "CarrierState") < 0)
446 if (link
->address_state
!= address_state
) {
447 link
->address_state
= address_state
;
449 if (strv_extend(&p
, "AddressState") < 0)
453 if (link
->operstate
!= operstate
) {
454 link
->operstate
= operstate
;
456 if (strv_extend(&p
, "OperationalState") < 0)
461 link_send_changed_strv(link
, p
);
465 if (also_update_master
&& link
->network
) {
466 link_update_master_operstate(link
, link
->network
->bond
);
467 link_update_master_operstate(link
, link
->network
->bridge
);
471 #define FLAG_STRING(string, flag, old, new) \
472 (((old ^ new) & flag) \
473 ? ((old & flag) ? (" -" string) : (" +" string)) \
476 static int link_update_flags(Link
*link
, sd_netlink_message
*m
, bool force_update_operstate
) {
477 unsigned flags
, unknown_flags_added
, unknown_flags_removed
, unknown_flags
;
483 r
= sd_rtnl_message_link_get_flags(m
, &flags
);
485 return log_link_warning_errno(link
, r
, "Could not get link flags: %m");
487 r
= sd_netlink_message_read_u8(m
, IFLA_OPERSTATE
, &operstate
);
489 /* if we got a message without operstate, take it to mean
490 the state was unchanged */
491 operstate
= link
->kernel_operstate
;
493 if (!force_update_operstate
&& (link
->flags
== flags
) && (link
->kernel_operstate
== operstate
))
496 if (link
->flags
!= flags
) {
497 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",
498 FLAG_STRING("LOOPBACK", IFF_LOOPBACK
, link
->flags
, flags
),
499 FLAG_STRING("MASTER", IFF_MASTER
, link
->flags
, flags
),
500 FLAG_STRING("SLAVE", IFF_SLAVE
, link
->flags
, flags
),
501 FLAG_STRING("UP", IFF_UP
, link
->flags
, flags
),
502 FLAG_STRING("DORMANT", IFF_DORMANT
, link
->flags
, flags
),
503 FLAG_STRING("LOWER_UP", IFF_LOWER_UP
, link
->flags
, flags
),
504 FLAG_STRING("RUNNING", IFF_RUNNING
, link
->flags
, flags
),
505 FLAG_STRING("MULTICAST", IFF_MULTICAST
, link
->flags
, flags
),
506 FLAG_STRING("BROADCAST", IFF_BROADCAST
, link
->flags
, flags
),
507 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT
, link
->flags
, flags
),
508 FLAG_STRING("PROMISC", IFF_PROMISC
, link
->flags
, flags
),
509 FLAG_STRING("ALLMULTI", IFF_ALLMULTI
, link
->flags
, flags
),
510 FLAG_STRING("PORTSEL", IFF_PORTSEL
, link
->flags
, flags
),
511 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA
, link
->flags
, flags
),
512 FLAG_STRING("DYNAMIC", IFF_DYNAMIC
, link
->flags
, flags
),
513 FLAG_STRING("NOARP", IFF_NOARP
, link
->flags
, flags
),
514 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS
, link
->flags
, flags
),
515 FLAG_STRING("DEBUG", IFF_DEBUG
, link
->flags
, flags
),
516 FLAG_STRING("ECHO", IFF_ECHO
, link
->flags
, flags
));
518 unknown_flags
= ~(IFF_LOOPBACK
| IFF_MASTER
| IFF_SLAVE
| IFF_UP
|
519 IFF_DORMANT
| IFF_LOWER_UP
| IFF_RUNNING
|
520 IFF_MULTICAST
| IFF_BROADCAST
| IFF_POINTOPOINT
|
521 IFF_PROMISC
| IFF_ALLMULTI
| IFF_PORTSEL
|
522 IFF_AUTOMEDIA
| IFF_DYNAMIC
| IFF_NOARP
|
523 IFF_NOTRAILERS
| IFF_DEBUG
| IFF_ECHO
);
524 unknown_flags_added
= ((link
->flags
^ flags
) & flags
& unknown_flags
);
525 unknown_flags_removed
= ((link
->flags
^ flags
) & link
->flags
& unknown_flags
);
527 /* link flags are currently at most 18 bits, let's align to
529 if (unknown_flags_added
)
531 "Unknown link flags gained: %#.5x (ignoring)",
532 unknown_flags_added
);
534 if (unknown_flags_removed
)
536 "Unknown link flags lost: %#.5x (ignoring)",
537 unknown_flags_removed
);
541 link
->kernel_operstate
= operstate
;
543 link_update_operstate(link
, true);
548 static int link_new(Manager
*manager
, sd_netlink_message
*message
, Link
**ret
) {
549 _cleanup_(link_unrefp
) Link
*link
= NULL
;
550 const char *ifname
, *kind
= NULL
;
551 unsigned short iftype
;
559 /* check for link kind */
560 r
= sd_netlink_message_enter_container(message
, IFLA_LINKINFO
);
562 (void) sd_netlink_message_read_string(message
, IFLA_INFO_KIND
, &kind
);
563 r
= sd_netlink_message_exit_container(message
);
568 r
= sd_netlink_message_get_type(message
, &type
);
571 else if (type
!= RTM_NEWLINK
)
574 r
= sd_rtnl_message_link_get_ifindex(message
, &ifindex
);
577 else if (ifindex
<= 0)
580 r
= sd_rtnl_message_link_get_type(message
, &iftype
);
584 r
= sd_netlink_message_read_string(message
, IFLA_IFNAME
, &ifname
);
595 .state
= LINK_STATE_PENDING
,
599 .n_dns
= (unsigned) -1,
600 .dns_default_route
= -1,
601 .llmnr
= _RESOLVE_SUPPORT_INVALID
,
602 .mdns
= _RESOLVE_SUPPORT_INVALID
,
603 .dnssec_mode
= _DNSSEC_MODE_INVALID
,
604 .dns_over_tls_mode
= _DNS_OVER_TLS_MODE_INVALID
,
607 link
->ifname
= strdup(ifname
);
612 link
->kind
= strdup(kind
);
617 r
= sd_netlink_message_read_u32(message
, IFLA_MASTER
, (uint32_t *)&link
->master_ifindex
);
619 log_link_debug_errno(link
, r
, "New device has no master, continuing without");
621 r
= sd_netlink_message_read_ether_addr(message
, IFLA_ADDRESS
, &link
->mac
);
623 log_link_debug_errno(link
, r
, "MAC address not found for new device, continuing without");
625 r
= ethtool_get_permanent_macaddr(&manager
->ethtool_fd
, link
->ifname
, &link
->permanent_mac
);
627 log_link_debug_errno(link
, r
, "Permanent MAC address not found for new device, continuing without: %m");
629 r
= ethtool_get_driver(&manager
->ethtool_fd
, link
->ifname
, &link
->driver
);
631 log_link_debug_errno(link
, r
, "Failed to get driver, continuing without: %m");
633 r
= sd_netlink_message_read_strv(message
, IFLA_PROP_LIST
, IFLA_ALT_IFNAME
, &link
->alternative_names
);
634 if (r
< 0 && r
!= -ENODATA
)
637 if (asprintf(&link
->state_file
, "/run/systemd/netif/links/%d", link
->ifindex
) < 0)
640 if (asprintf(&link
->lease_file
, "/run/systemd/netif/leases/%d", link
->ifindex
) < 0)
643 if (asprintf(&link
->lldp_file
, "/run/systemd/netif/lldp/%d", link
->ifindex
) < 0)
646 r
= hashmap_ensure_allocated(&manager
->links
, NULL
);
650 r
= hashmap_put(manager
->links
, INT_TO_PTR(link
->ifindex
), link
);
654 r
= link_update_flags(link
, message
, false);
658 *ret
= TAKE_PTR(link
);
663 void link_ntp_settings_clear(Link
*link
) {
664 link
->ntp
= strv_free(link
->ntp
);
667 void link_dns_settings_clear(Link
*link
) {
668 if (link
->n_dns
!= (unsigned) -1)
669 for (unsigned i
= 0; i
< link
->n_dns
; i
++)
670 in_addr_full_free(link
->dns
[i
]);
671 link
->dns
= mfree(link
->dns
);
672 link
->n_dns
= (unsigned) -1;
674 link
->search_domains
= ordered_set_free_free(link
->search_domains
);
675 link
->route_domains
= ordered_set_free_free(link
->route_domains
);
677 link
->dns_default_route
= -1;
678 link
->llmnr
= _RESOLVE_SUPPORT_INVALID
;
679 link
->mdns
= _RESOLVE_SUPPORT_INVALID
;
680 link
->dnssec_mode
= _DNSSEC_MODE_INVALID
;
681 link
->dns_over_tls_mode
= _DNS_OVER_TLS_MODE_INVALID
;
683 link
->dnssec_negative_trust_anchors
= set_free_free(link
->dnssec_negative_trust_anchors
);
686 static void link_free_engines(Link
*link
) {
690 link
->dhcp_server
= sd_dhcp_server_unref(link
->dhcp_server
);
691 link
->dhcp_client
= sd_dhcp_client_unref(link
->dhcp_client
);
692 link
->dhcp_lease
= sd_dhcp_lease_unref(link
->dhcp_lease
);
694 link
->lldp
= sd_lldp_unref(link
->lldp
);
698 link
->ipv4ll
= sd_ipv4ll_unref(link
->ipv4ll
);
699 link
->dhcp6_client
= sd_dhcp6_client_unref(link
->dhcp6_client
);
700 link
->dhcp6_lease
= sd_dhcp6_lease_unref(link
->dhcp6_lease
);
701 link
->ndisc
= sd_ndisc_unref(link
->ndisc
);
702 link
->radv
= sd_radv_unref(link
->radv
);
705 static Link
*link_free(Link
*link
) {
710 link_ntp_settings_clear(link
);
711 link_dns_settings_clear(link
);
713 link
->routes
= set_free(link
->routes
);
714 link
->routes_foreign
= set_free(link
->routes_foreign
);
715 link
->dhcp_routes
= set_free(link
->dhcp_routes
);
716 link
->dhcp_routes_old
= set_free(link
->dhcp_routes_old
);
717 link
->dhcp6_routes
= set_free(link
->dhcp6_routes
);
718 link
->dhcp6_routes_old
= set_free(link
->dhcp6_routes_old
);
719 link
->dhcp6_pd_routes
= set_free(link
->dhcp6_pd_routes
);
720 link
->dhcp6_pd_routes_old
= set_free(link
->dhcp6_pd_routes_old
);
721 link
->ndisc_routes
= set_free(link
->ndisc_routes
);
723 link
->nexthops
= set_free(link
->nexthops
);
724 link
->nexthops_foreign
= set_free(link
->nexthops_foreign
);
726 link
->neighbors
= set_free(link
->neighbors
);
727 link
->neighbors_foreign
= set_free(link
->neighbors_foreign
);
729 link
->addresses
= set_free(link
->addresses
);
730 link
->addresses_foreign
= set_free(link
->addresses_foreign
);
731 link
->static_addresses
= set_free(link
->static_addresses
);
732 link
->dhcp6_addresses
= set_free(link
->dhcp6_addresses
);
733 link
->dhcp6_addresses_old
= set_free(link
->dhcp6_addresses_old
);
734 link
->dhcp6_pd_addresses
= set_free(link
->dhcp6_pd_addresses
);
735 link
->dhcp6_pd_addresses_old
= set_free(link
->dhcp6_pd_addresses_old
);
736 link
->ndisc_addresses
= set_free(link
->ndisc_addresses
);
738 while ((address
= link
->pool_addresses
)) {
739 LIST_REMOVE(addresses
, link
->pool_addresses
, address
);
740 address_free(address
);
743 link_lldp_emit_stop(link
);
744 link_free_engines(link
);
745 free(link
->lease_file
);
746 free(link
->lldp_file
);
749 strv_free(link
->alternative_names
);
754 (void) unlink(link
->state_file
);
755 free(link
->state_file
);
757 sd_device_unref(link
->sd_device
);
759 hashmap_free(link
->bound_to_links
);
760 hashmap_free(link
->bound_by_links
);
762 set_free_with_destructor(link
->slaves
, link_unref
);
764 network_unref(link
->network
);
769 DEFINE_TRIVIAL_REF_UNREF_FUNC(Link
, link
, link_free
);
771 int link_get(Manager
*m
, int ifindex
, Link
**ret
) {
778 link
= hashmap_get(m
->links
, INT_TO_PTR(ifindex
));
787 void link_set_state(Link
*link
, LinkState state
) {
790 if (link
->state
== state
)
793 log_link_debug(link
, "State changed: %s -> %s",
794 link_state_to_string(link
->state
),
795 link_state_to_string(state
));
799 link_send_changed(link
, "AdministrativeState", NULL
);
802 static void link_enter_unmanaged(Link
*link
) {
805 link_set_state(link
, LINK_STATE_UNMANAGED
);
810 int link_stop_clients(Link
*link
, bool may_keep_dhcp
) {
815 assert(link
->manager
);
816 assert(link
->manager
->event
);
818 bool keep_dhcp
= may_keep_dhcp
&&
820 (link
->manager
->restarting
||
821 FLAGS_SET(link
->network
->keep_configuration
, KEEP_CONFIGURATION_DHCP_ON_STOP
));
823 if (link
->dhcp_client
&& !keep_dhcp
) {
824 k
= sd_dhcp_client_stop(link
->dhcp_client
);
826 r
= log_link_warning_errno(link
, k
, "Could not stop DHCPv4 client: %m");
830 k
= sd_ipv4ll_stop(link
->ipv4ll
);
832 r
= log_link_warning_errno(link
, k
, "Could not stop IPv4 link-local: %m");
836 LIST_FOREACH(addresses
, ad
, link
->network
->static_addresses
)
837 if (ad
->acd
&& sd_ipv4acd_is_running(ad
->acd
) == 0) {
838 k
= sd_ipv4acd_stop(ad
->acd
);
840 r
= log_link_warning_errno(link
, k
, "Could not stop IPv4 ACD client: %m");
843 if (link
->dhcp6_client
) {
844 k
= sd_dhcp6_client_stop(link
->dhcp6_client
);
846 r
= log_link_warning_errno(link
, k
, "Could not stop DHCPv6 client: %m");
849 if (link_dhcp6_pd_is_enabled(link
)) {
850 k
= dhcp6_pd_remove(link
);
852 r
= log_link_warning_errno(link
, k
, "Could not remove DHCPv6 PD addresses and routes: %m");
856 k
= sd_ndisc_stop(link
->ndisc
);
858 r
= log_link_warning_errno(link
, k
, "Could not stop IPv6 Router Discovery: %m");
862 k
= sd_radv_stop(link
->radv
);
864 r
= log_link_warning_errno(link
, k
, "Could not stop IPv6 Router Advertisement: %m");
867 link_lldp_emit_stop(link
);
871 void link_enter_failed(Link
*link
) {
874 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
877 log_link_warning(link
, "Failed");
879 link_set_state(link
, LINK_STATE_FAILED
);
881 link_stop_clients(link
, false);
886 static int link_join_netdevs_after_configured(Link
*link
) {
890 HASHMAP_FOREACH(netdev
, link
->network
->stacked_netdevs
) {
891 if (netdev
->ifindex
> 0)
892 /* Assume already enslaved. */
895 if (netdev_get_create_type(netdev
) != NETDEV_CREATE_AFTER_CONFIGURED
)
898 log_struct(LOG_DEBUG
,
899 LOG_LINK_INTERFACE(link
),
900 LOG_NETDEV_INTERFACE(netdev
),
901 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", netdev
->ifname
));
903 r
= netdev_join(netdev
, link
, NULL
);
905 return log_struct_errno(LOG_WARNING
, r
,
906 LOG_LINK_INTERFACE(link
),
907 LOG_NETDEV_INTERFACE(netdev
),
908 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", netdev
->ifname
));
914 static void link_enter_configured(Link
*link
) {
916 assert(link
->network
);
918 if (link
->state
!= LINK_STATE_CONFIGURING
)
921 link_set_state(link
, LINK_STATE_CONFIGURED
);
923 (void) link_join_netdevs_after_configured(link
);
928 static int link_request_set_routing_policy_rule(Link
*link
) {
929 RoutingPolicyRule
*rule
, *rrule
= NULL
;
933 assert(link
->network
);
935 link
->routing_policy_rules_configured
= false;
937 LIST_FOREACH(rules
, rule
, link
->network
->rules
) {
938 r
= routing_policy_rule_get(link
->manager
, rule
, &rrule
);
941 (void) routing_policy_rule_make_local(link
->manager
, rrule
);
945 r
= routing_policy_rule_configure(rule
, link
, NULL
);
947 return log_link_warning_errno(link
, r
, "Could not set routing policy rules: %m");
949 link
->routing_policy_rule_messages
++;
952 routing_policy_rule_purge(link
->manager
, link
);
953 if (link
->routing_policy_rule_messages
== 0)
954 link
->routing_policy_rules_configured
= true;
956 log_link_debug(link
, "Setting routing policy rules");
957 link_set_state(link
, LINK_STATE_CONFIGURING
);
963 static int nexthop_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
967 assert(link
->nexthop_messages
> 0);
968 assert(IN_SET(link
->state
, LINK_STATE_CONFIGURING
,
969 LINK_STATE_FAILED
, LINK_STATE_LINGER
));
971 link
->nexthop_messages
--;
973 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
976 r
= sd_netlink_message_get_errno(m
);
977 if (r
< 0 && r
!= -EEXIST
) {
978 log_link_message_warning_errno(link
, m
, r
, "Could not set nexthop");
979 link_enter_failed(link
);
983 if (link
->nexthop_messages
== 0) {
984 log_link_debug(link
, "Nexthop set");
985 link
->static_nexthops_configured
= true;
986 link_check_ready(link
);
992 static int link_request_set_nexthop(Link
*link
) {
996 link
->static_nexthops_configured
= false;
998 LIST_FOREACH(nexthops
, nh
, link
->network
->static_nexthops
) {
999 r
= nexthop_configure(nh
, link
, nexthop_handler
);
1001 return log_link_warning_errno(link
, r
, "Could not set nexthop: %m");
1003 link
->nexthop_messages
++;
1006 if (link
->nexthop_messages
== 0) {
1007 link
->static_nexthops_configured
= true;
1008 link_check_ready(link
);
1010 log_link_debug(link
, "Setting nexthop");
1011 link_set_state(link
, LINK_STATE_CONFIGURING
);
1017 static int route_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1021 assert(link
->route_messages
> 0);
1022 assert(IN_SET(link
->state
, LINK_STATE_CONFIGURING
,
1023 LINK_STATE_FAILED
, LINK_STATE_LINGER
));
1025 link
->route_messages
--;
1027 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1030 r
= sd_netlink_message_get_errno(m
);
1031 if (r
< 0 && r
!= -EEXIST
) {
1032 log_link_message_warning_errno(link
, m
, r
, "Could not set route");
1033 link_enter_failed(link
);
1037 if (link
->route_messages
== 0) {
1038 log_link_debug(link
, "Routes set");
1039 link
->static_routes_configured
= true;
1040 link_request_set_nexthop(link
);
1046 int link_request_set_routes(Link
*link
) {
1048 PHASE_NON_GATEWAY
, /* First phase: Routes without a gateway */
1049 PHASE_GATEWAY
, /* Second phase: Routes with a gateway */
1056 assert(link
->network
);
1057 assert(link
->state
!= _LINK_STATE_INVALID
);
1059 link
->static_routes_configured
= false;
1061 if (!link
->addresses_ready
)
1064 if (!link_has_carrier(link
) && !link
->network
->configure_without_carrier
)
1065 /* During configuring addresses, the link lost its carrier. As networkd is dropping
1066 * the addresses now, let's not configure the routes either. */
1069 r
= link_request_set_routing_policy_rule(link
);
1073 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
1074 for (phase
= 0; phase
< _PHASE_MAX
; phase
++)
1075 LIST_FOREACH(routes
, rt
, link
->network
->static_routes
) {
1076 if (rt
->gateway_from_dhcp
)
1079 if ((in_addr_is_null(rt
->family
, &rt
->gw
) && ordered_set_isempty(rt
->multipath_routes
)) != (phase
== PHASE_NON_GATEWAY
))
1082 r
= route_configure(rt
, link
, route_handler
, NULL
);
1084 return log_link_warning_errno(link
, r
, "Could not set routes: %m");
1086 link
->route_messages
++;
1089 if (link
->route_messages
== 0) {
1090 link
->static_routes_configured
= true;
1091 link_request_set_nexthop(link
);
1093 log_link_debug(link
, "Setting routes");
1094 link_set_state(link
, LINK_STATE_CONFIGURING
);
1100 void link_check_ready(Link
*link
) {
1105 if (link
->state
== LINK_STATE_CONFIGURED
)
1108 if (link
->state
!= LINK_STATE_CONFIGURING
) {
1109 log_link_debug(link
, "%s(): link is in %s state.", __func__
, link_state_to_string(link
->state
));
1116 if (!link
->addresses_configured
) {
1117 log_link_debug(link
, "%s(): static addresses are not configured.", __func__
);
1121 if (!link
->neighbors_configured
) {
1122 log_link_debug(link
, "%s(): static neighbors are not configured.", __func__
);
1126 SET_FOREACH(a
, link
->addresses
)
1127 if (!address_is_ready(a
)) {
1128 _cleanup_free_
char *str
= NULL
;
1130 (void) in_addr_to_string(a
->family
, &a
->in_addr
, &str
);
1131 log_link_debug(link
, "%s(): an address %s/%d is not ready.", __func__
, strnull(str
), a
->prefixlen
);
1135 if (!link
->static_routes_configured
) {
1136 log_link_debug(link
, "%s(): static routes are not configured.", __func__
);
1140 if (!link
->static_nexthops_configured
) {
1141 log_link_debug(link
, "%s(): static nexthops are not configured.", __func__
);
1145 if (!link
->routing_policy_rules_configured
) {
1146 log_link_debug(link
, "%s(): static routing policy rules are not configured.", __func__
);
1150 if (!link
->tc_configured
) {
1151 log_link_debug(link
, "%s(): traffic controls are not configured.", __func__
);
1155 if (!link
->sr_iov_configured
) {
1156 log_link_debug(link
, "%s(): SR-IOV is not configured.", __func__
);
1160 if (link_has_carrier(link
) || !link
->network
->configure_without_carrier
) {
1161 bool has_ndisc_address
= false;
1164 if (link_ipv4ll_enabled(link
, ADDRESS_FAMILY_IPV4
) && !link
->ipv4ll_address_configured
) {
1165 log_link_debug(link
, "%s(): IPv4LL is not configured.", __func__
);
1169 if (link_ipv6ll_enabled(link
) &&
1170 in_addr_is_null(AF_INET6
, (const union in_addr_union
*) &link
->ipv6ll_address
)) {
1171 log_link_debug(link
, "%s(): IPv6LL is not configured.", __func__
);
1175 SET_FOREACH(n
, link
->ndisc_addresses
)
1177 has_ndisc_address
= true;
1181 if ((link_dhcp4_enabled(link
) || link_dhcp6_enabled(link
)) &&
1182 !link
->dhcp_address
&& set_isempty(link
->dhcp6_addresses
) && !has_ndisc_address
&&
1183 !(link_ipv4ll_enabled(link
, ADDRESS_FAMILY_FALLBACK_IPV4
) && link
->ipv4ll_address_configured
)) {
1184 log_link_debug(link
, "%s(): DHCP4 or DHCP6 is enabled but no dynamic address is assigned yet.", __func__
);
1188 if (link_dhcp4_enabled(link
) || link_dhcp6_enabled(link
) || link_dhcp6_pd_is_enabled(link
) || link_ipv6_accept_ra_enabled(link
)) {
1189 if (!link
->dhcp4_configured
&&
1190 !(link
->dhcp6_address_configured
&& link
->dhcp6_route_configured
) &&
1191 !(link
->dhcp6_pd_address_configured
&& link
->dhcp6_pd_route_configured
) &&
1192 !(link
->ndisc_addresses_configured
&& link
->ndisc_routes_configured
) &&
1193 !(link_ipv4ll_enabled(link
, ADDRESS_FAMILY_FALLBACK_IPV4
) && link
->ipv4ll_address_configured
)) {
1194 /* When DHCP or RA is enabled, at least one protocol must provide an address, or
1195 * an IPv4ll fallback address must be configured. */
1196 log_link_debug(link
, "%s(): dynamic addresses or routes are not configured.", __func__
);
1200 log_link_debug(link
, "%s(): dhcp4:%s dhcp6_addresses:%s dhcp_routes:%s dhcp_pd_addresses:%s dhcp_pd_routes:%s ndisc_addresses:%s ndisc_routes:%s",
1202 yes_no(link
->dhcp4_configured
),
1203 yes_no(link
->dhcp6_address_configured
),
1204 yes_no(link
->dhcp6_route_configured
),
1205 yes_no(link
->dhcp6_pd_address_configured
),
1206 yes_no(link
->dhcp6_pd_route_configured
),
1207 yes_no(link
->ndisc_addresses_configured
),
1208 yes_no(link
->ndisc_routes_configured
));
1212 link_enter_configured(link
);
1217 static int link_request_set_neighbors(Link
*link
) {
1222 assert(link
->network
);
1223 assert(link
->state
!= _LINK_STATE_INVALID
);
1225 link
->neighbors_configured
= false;
1227 LIST_FOREACH(neighbors
, neighbor
, link
->network
->neighbors
) {
1228 r
= neighbor_configure(neighbor
, link
, NULL
);
1230 return log_link_warning_errno(link
, r
, "Could not set neighbor: %m");
1233 if (link
->neighbor_messages
== 0) {
1234 link
->neighbors_configured
= true;
1235 link_check_ready(link
);
1237 log_link_debug(link
, "Setting neighbors");
1238 link_set_state(link
, LINK_STATE_CONFIGURING
);
1244 static int link_set_bridge_fdb(Link
*link
) {
1245 FdbEntry
*fdb_entry
;
1248 LIST_FOREACH(static_fdb_entries
, fdb_entry
, link
->network
->static_fdb_entries
) {
1249 r
= fdb_entry_configure(link
, fdb_entry
);
1251 return log_link_error_errno(link
, r
, "Failed to add MAC entry to static MAC table: %m");
1257 static int static_address_ready_callback(Address
*address
) {
1262 assert(address
->link
);
1264 link
= address
->link
;
1266 if (!link
->addresses_configured
)
1269 SET_FOREACH(a
, link
->static_addresses
)
1270 if (!address_is_ready(a
)) {
1271 _cleanup_free_
char *str
= NULL
;
1273 (void) in_addr_to_string(a
->family
, &a
->in_addr
, &str
);
1274 log_link_debug(link
, "an address %s/%u is not ready", strnull(str
), a
->prefixlen
);
1278 /* This should not be called again */
1279 SET_FOREACH(a
, link
->static_addresses
)
1282 link
->addresses_ready
= true;
1284 return link_request_set_routes(link
);
1287 static int address_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1293 assert(link
->ifname
);
1294 assert(link
->address_messages
> 0);
1295 assert(IN_SET(link
->state
, LINK_STATE_CONFIGURING
,
1296 LINK_STATE_FAILED
, LINK_STATE_LINGER
));
1298 link
->address_messages
--;
1300 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1303 r
= sd_netlink_message_get_errno(m
);
1304 if (r
< 0 && r
!= -EEXIST
) {
1305 log_link_message_warning_errno(link
, m
, r
, "Could not set address");
1306 link_enter_failed(link
);
1309 (void) manager_rtnl_process_address(rtnl
, m
, link
->manager
);
1311 if (link
->address_messages
== 0) {
1314 log_link_debug(link
, "Addresses set");
1315 link
->addresses_configured
= true;
1317 /* When all static addresses are already ready, then static_address_ready_callback()
1318 * will not be called automatically. So, call it here. */
1319 a
= set_first(link
->static_addresses
);
1321 log_link_warning(link
, "No static address is stored.");
1322 link_enter_failed(link
);
1326 log_link_warning(link
, "Address ready callback is not set.");
1327 link_enter_failed(link
);
1332 link_enter_failed(link
);
1338 static int static_address_configure(Address
*address
, Link
*link
, bool update
) {
1345 r
= address_configure(address
, link
, address_handler
, update
, &ret
);
1347 return log_link_warning_errno(link
, r
, "Could not configure static address: %m");
1349 link
->address_messages
++;
1351 r
= set_ensure_put(&link
->static_addresses
, &address_hash_ops
, ret
);
1353 return log_link_warning_errno(link
, r
, "Failed to store static address: %m");
1355 ret
->callback
= static_address_ready_callback
;
1360 static int link_request_set_addresses(Link
*link
) {
1361 AddressLabel
*label
;
1367 assert(link
->network
);
1368 assert(link
->state
!= _LINK_STATE_INVALID
);
1370 if (link
->address_remove_messages
!= 0) {
1371 log_link_debug(link
, "Removing old addresses, new addresses will be configured later.");
1372 link
->request_static_addresses
= true;
1376 /* Reset all *_configured flags we are configuring. */
1377 link
->request_static_addresses
= false;
1378 link
->addresses_configured
= false;
1379 link
->addresses_ready
= false;
1380 link
->neighbors_configured
= false;
1381 link
->static_routes_configured
= false;
1382 link
->static_nexthops_configured
= false;
1383 link
->routing_policy_rules_configured
= false;
1385 r
= link_set_bridge_fdb(link
);
1389 r
= link_request_set_neighbors(link
);
1393 LIST_FOREACH(addresses
, ad
, link
->network
->static_addresses
) {
1396 if (ad
->family
== AF_INET6
&& !in_addr_is_null(ad
->family
, &ad
->in_addr_peer
))
1397 update
= address_get(link
, ad
->family
, &ad
->in_addr_peer
, ad
->prefixlen
, NULL
) > 0;
1399 update
= address_get(link
, ad
->family
, &ad
->in_addr
, ad
->prefixlen
, NULL
) > 0;
1401 r
= static_address_configure(ad
, link
, update
);
1406 if (link
->network
->router_prefix_delegation
& RADV_PREFIX_DELEGATION_STATIC
)
1407 LIST_FOREACH(prefixes
, p
, link
->network
->static_prefixes
) {
1408 _cleanup_(address_freep
) Address
*address
= NULL
;
1413 r
= address_new(&address
);
1417 r
= sd_radv_prefix_get_prefix(p
->radv_prefix
, &address
->in_addr
.in6
, &address
->prefixlen
);
1419 return log_link_warning_errno(link
, r
, "Could not get RA prefix: %m");
1421 r
= generate_ipv6_eui_64_address(link
, &address
->in_addr
.in6
);
1423 return log_link_warning_errno(link
, r
, "Could not generate EUI64 address: %m");
1425 address
->family
= AF_INET6
;
1426 r
= static_address_configure(address
, link
, true);
1431 LIST_FOREACH(labels
, label
, link
->network
->address_labels
) {
1432 r
= address_label_configure(label
, link
, NULL
, false);
1434 return log_link_warning_errno(link
, r
, "Could not set address label: %m");
1436 link
->address_label_messages
++;
1439 /* now that we can figure out a default address for the dhcp server, start it */
1440 if (link_dhcp4_server_enabled(link
) && (link
->flags
& IFF_UP
)) {
1441 r
= dhcp4_server_configure(link
);
1444 log_link_debug(link
, "Offering DHCPv4 leases");
1447 if (link
->address_messages
== 0) {
1448 link
->addresses_configured
= true;
1449 link
->addresses_ready
= true;
1450 r
= link_request_set_routes(link
);
1454 log_link_debug(link
, "Setting addresses");
1455 link_set_state(link
, LINK_STATE_CONFIGURING
);
1461 static int link_set_bridge_vlan(Link
*link
) {
1464 r
= br_vlan_configure(link
, link
->network
->pvid
, link
->network
->br_vid_bitmap
, link
->network
->br_untagged_bitmap
);
1466 log_link_error_errno(link
, r
, "Failed to assign VLANs to bridge port: %m");
1471 static int link_set_proxy_arp(Link
*link
) {
1474 if (!link_proxy_arp_enabled(link
))
1477 r
= sysctl_write_ip_property_boolean(AF_INET
, link
->ifname
, "proxy_arp", link
->network
->proxy_arp
> 0);
1479 log_link_warning_errno(link
, r
, "Cannot configure proxy ARP for interface: %m");
1484 static int link_configure_continue(Link
*link
);
1486 static int set_mtu_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1491 assert(link
->ifname
);
1493 link
->setting_mtu
= false;
1495 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1498 r
= sd_netlink_message_get_errno(m
);
1500 log_link_message_warning_errno(link
, m
, r
, "Could not set MTU, ignoring");
1502 log_link_debug(link
, "Setting MTU done.");
1504 if (link
->state
== LINK_STATE_INITIALIZED
) {
1505 r
= link_configure_continue(link
);
1507 link_enter_failed(link
);
1513 int link_set_mtu(Link
*link
, uint32_t mtu
) {
1514 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1518 assert(link
->manager
);
1519 assert(link
->manager
->rtnl
);
1521 if (mtu
== 0 || link
->setting_mtu
)
1524 if (link
->mtu
== mtu
)
1527 log_link_debug(link
, "Setting MTU: %" PRIu32
, mtu
);
1529 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1531 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1533 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
1534 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1535 if (link_ipv6_enabled(link
) && mtu
< IPV6_MIN_MTU
) {
1537 log_link_warning(link
, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU
) ", as "
1538 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU
) " bytes");
1543 r
= sd_netlink_message_append_u32(req
, IFLA_MTU
, mtu
);
1545 return log_link_error_errno(link
, r
, "Could not append MTU: %m");
1547 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, set_mtu_handler
,
1548 link_netlink_destroy_callback
, link
);
1550 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1553 link
->setting_mtu
= true;
1558 static bool link_reduces_vlan_mtu(Link
*link
) {
1559 /* See netif_reduces_vlan_mtu() in kernel. */
1560 return streq_ptr(link
->kind
, "macsec");
1563 static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link
*link
) {
1567 HASHMAP_FOREACH(dev
, link
->network
->stacked_netdevs
)
1568 if (dev
->kind
== NETDEV_KIND_VLAN
&& dev
->mtu
> 0)
1569 /* See vlan_dev_change_mtu() in kernel. */
1570 mtu
= MAX(mtu
, link_reduces_vlan_mtu(link
) ? dev
->mtu
+ 4 : dev
->mtu
);
1572 else if (dev
->kind
== NETDEV_KIND_MACVLAN
&& dev
->mtu
> mtu
)
1573 /* See macvlan_change_mtu() in kernel. */
1579 static int link_configure_mtu(Link
*link
) {
1583 assert(link
->network
);
1585 if (link
->network
->mtu
> 0)
1586 return link_set_mtu(link
, link
->network
->mtu
);
1588 mtu
= link_get_requested_mtu_by_stacked_netdevs(link
);
1589 if (link
->mtu
>= mtu
)
1592 log_link_notice(link
, "Bumping MTU bytes from %"PRIu32
" to %"PRIu32
" because of stacked device. "
1593 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1596 return link_set_mtu(link
, mtu
);
1599 static int set_flags_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1604 assert(link
->ifname
);
1606 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1609 r
= sd_netlink_message_get_errno(m
);
1611 log_link_message_warning_errno(link
, m
, r
, "Could not set link flags, ignoring");
1616 static int link_set_flags(Link
*link
) {
1617 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1618 unsigned ifi_change
= 0;
1619 unsigned ifi_flags
= 0;
1623 assert(link
->manager
);
1624 assert(link
->manager
->rtnl
);
1626 if (link
->flags
& IFF_LOOPBACK
)
1632 if (link
->network
->arp
< 0 && link
->network
->multicast
< 0 && link
->network
->allmulticast
< 0)
1635 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1637 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1639 if (link
->network
->arp
>= 0) {
1640 ifi_change
|= IFF_NOARP
;
1641 SET_FLAG(ifi_flags
, IFF_NOARP
, link
->network
->arp
== 0);
1644 if (link
->network
->multicast
>= 0) {
1645 ifi_change
|= IFF_MULTICAST
;
1646 SET_FLAG(ifi_flags
, IFF_MULTICAST
, link
->network
->multicast
);
1649 if (link
->network
->allmulticast
>= 0) {
1650 ifi_change
|= IFF_ALLMULTI
;
1651 SET_FLAG(ifi_flags
, IFF_ALLMULTI
, link
->network
->allmulticast
);
1654 r
= sd_rtnl_message_link_set_flags(req
, ifi_flags
, ifi_change
);
1656 return log_link_error_errno(link
, r
, "Could not set link flags: %m");
1658 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, set_flags_handler
,
1659 link_netlink_destroy_callback
, link
);
1661 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1668 static int link_acquire_ipv6_conf(Link
*link
) {
1673 if (link_ipv6_accept_ra_enabled(link
)) {
1674 assert(link
->ndisc
);
1676 log_link_debug(link
, "Discovering IPv6 routers");
1678 r
= sd_ndisc_start(link
->ndisc
);
1679 if (r
< 0 && r
!= -EBUSY
)
1680 return log_link_warning_errno(link
, r
, "Could not start IPv6 Router Discovery: %m");
1683 if (link_radv_enabled(link
)) {
1685 assert(in_addr_is_link_local(AF_INET6
, (const union in_addr_union
*)&link
->ipv6ll_address
) > 0);
1687 log_link_debug(link
, "Starting IPv6 Router Advertisements");
1689 r
= radv_emit_dns(link
);
1691 return log_link_warning_errno(link
, r
, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
1693 r
= sd_radv_start(link
->radv
);
1694 if (r
< 0 && r
!= -EBUSY
)
1695 return log_link_warning_errno(link
, r
, "Could not start IPv6 Router Advertisement: %m");
1698 if (link_dhcp6_enabled(link
) && IN_SET(link
->network
->dhcp6_without_ra
,
1699 DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST
,
1700 DHCP6_CLIENT_START_MODE_SOLICIT
)) {
1701 assert(link
->dhcp6_client
);
1702 assert(in_addr_is_link_local(AF_INET6
, (const union in_addr_union
*)&link
->ipv6ll_address
) > 0);
1704 r
= dhcp6_request_address(link
, link
->network
->dhcp6_without_ra
== DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST
);
1705 if (r
< 0 && r
!= -EBUSY
)
1706 return log_link_warning_errno(link
, r
, "Could not acquire DHCPv6 lease: %m");
1708 log_link_debug(link
, "Acquiring DHCPv6 lease");
1711 r
= dhcp6_request_prefix_delegation(link
);
1713 return log_link_warning_errno(link
, r
, "Failed to request DHCPv6 prefix delegation: %m");
1718 static int link_acquire_ipv4_conf(Link
*link
) {
1722 assert(link
->manager
);
1723 assert(link
->manager
->event
);
1725 if (link_ipv4ll_enabled(link
, ADDRESS_FAMILY_IPV4
)) {
1726 assert(link
->ipv4ll
);
1728 log_link_debug(link
, "Acquiring IPv4 link-local address");
1730 r
= sd_ipv4ll_start(link
->ipv4ll
);
1732 return log_link_warning_errno(link
, r
, "Could not acquire IPv4 link-local address: %m");
1735 if (link_dhcp4_enabled(link
)) {
1736 assert(link
->dhcp_client
);
1738 log_link_debug(link
, "Acquiring DHCPv4 lease");
1740 r
= sd_dhcp_client_start(link
->dhcp_client
);
1742 return log_link_warning_errno(link
, r
, "Could not acquire DHCPv4 lease: %m");
1748 static int link_acquire_conf(Link
*link
) {
1753 r
= link_acquire_ipv4_conf(link
);
1757 if (!in_addr_is_null(AF_INET6
, (const union in_addr_union
*) &link
->ipv6ll_address
)) {
1758 r
= link_acquire_ipv6_conf(link
);
1763 if (link_lldp_emit_enabled(link
)) {
1764 r
= link_lldp_emit_start(link
);
1766 return log_link_warning_errno(link
, r
, "Failed to start LLDP transmission: %m");
1772 bool link_has_carrier(Link
*link
) {
1773 /* see Documentation/networking/operstates.txt in the kernel sources */
1775 if (link
->kernel_operstate
== IF_OPER_UP
)
1778 if (link
->kernel_operstate
== IF_OPER_UNKNOWN
)
1779 /* operstate may not be implemented, so fall back to flags */
1780 if (FLAGS_SET(link
->flags
, IFF_LOWER_UP
| IFF_RUNNING
) &&
1781 !FLAGS_SET(link
->flags
, IFF_DORMANT
))
1787 static int link_address_genmode_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1792 link
->setting_genmode
= false;
1794 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1797 r
= sd_netlink_message_get_errno(m
);
1799 log_link_message_warning_errno(link
, m
, r
, "Could not set address genmode for interface, ignoring");
1801 log_link_debug(link
, "Setting address genmode done.");
1803 if (link
->state
== LINK_STATE_INITIALIZED
) {
1804 r
= link_configure_continue(link
);
1806 link_enter_failed(link
);
1812 static int link_configure_addrgen_mode(Link
*link
) {
1813 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1814 uint8_t ipv6ll_mode
;
1818 assert(link
->network
);
1819 assert(link
->manager
);
1820 assert(link
->manager
->rtnl
);
1822 if (!socket_ipv6_is_supported() || link
->setting_genmode
)
1825 log_link_debug(link
, "Setting address genmode for link");
1827 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1829 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1831 r
= sd_netlink_message_open_container(req
, IFLA_AF_SPEC
);
1833 return log_link_error_errno(link
, r
, "Could not open IFLA_AF_SPEC container: %m");
1835 r
= sd_netlink_message_open_container(req
, AF_INET6
);
1837 return log_link_error_errno(link
, r
, "Could not open AF_INET6 container: %m");
1839 if (!link_ipv6ll_enabled(link
))
1840 ipv6ll_mode
= IN6_ADDR_GEN_MODE_NONE
;
1841 else if (link
->network
->ipv6ll_address_gen_mode
< 0) {
1842 r
= sysctl_read_ip_property(AF_INET6
, link
->ifname
, "stable_secret", NULL
);
1844 /* The file may not exist. And even if it exists, when stable_secret is unset,
1845 * reading the file fails with EIO. */
1846 log_link_debug_errno(link
, r
, "Failed to read sysctl property stable_secret: %m");
1848 ipv6ll_mode
= IN6_ADDR_GEN_MODE_EUI64
;
1850 ipv6ll_mode
= IN6_ADDR_GEN_MODE_STABLE_PRIVACY
;
1852 ipv6ll_mode
= link
->network
->ipv6ll_address_gen_mode
;
1854 r
= sd_netlink_message_append_u8(req
, IFLA_INET6_ADDR_GEN_MODE
, ipv6ll_mode
);
1856 return log_link_error_errno(link
, r
, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1858 r
= sd_netlink_message_close_container(req
);
1860 return log_link_error_errno(link
, r
, "Could not close AF_INET6 container: %m");
1862 r
= sd_netlink_message_close_container(req
);
1864 return log_link_error_errno(link
, r
, "Could not close IFLA_AF_SPEC container: %m");
1866 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, link_address_genmode_handler
,
1867 link_netlink_destroy_callback
, link
);
1869 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1872 link
->setting_genmode
= true;
1877 static int link_up_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1882 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1885 r
= sd_netlink_message_get_errno(m
);
1887 /* we warn but don't fail the link, as it may be brought up later */
1888 log_link_message_warning_errno(link
, m
, r
, "Could not bring up interface");
1893 static int link_up(Link
*link
) {
1894 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1898 assert(link
->network
);
1899 assert(link
->manager
);
1900 assert(link
->manager
->rtnl
);
1902 log_link_debug(link
, "Bringing link up");
1904 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1906 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1908 /* set it free if not enslaved with networkd */
1909 if (!link
->network
->bridge
&& !link
->network
->bond
&& !link
->network
->vrf
) {
1910 r
= sd_netlink_message_append_u32(req
, IFLA_MASTER
, 0);
1912 return log_link_error_errno(link
, r
, "Could not append IFLA_MASTER attribute: %m");
1915 r
= sd_rtnl_message_link_set_flags(req
, IFF_UP
, IFF_UP
);
1917 return log_link_error_errno(link
, r
, "Could not set link flags: %m");
1919 if (link
->network
->mac
) {
1920 r
= sd_netlink_message_append_ether_addr(req
, IFLA_ADDRESS
, link
->network
->mac
);
1922 return log_link_error_errno(link
, r
, "Could not set MAC address: %m");
1925 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, link_up_handler
,
1926 link_netlink_destroy_callback
, link
);
1928 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1935 static int link_down_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1940 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1943 r
= sd_netlink_message_get_errno(m
);
1945 log_link_message_warning_errno(link
, m
, r
, "Could not bring down interface");
1950 int link_down(Link
*link
, link_netlink_message_handler_t callback
) {
1951 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1955 assert(link
->manager
);
1956 assert(link
->manager
->rtnl
);
1958 log_link_debug(link
, "Bringing link down");
1960 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
,
1961 RTM_SETLINK
, link
->ifindex
);
1963 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1965 r
= sd_rtnl_message_link_set_flags(req
, 0, IFF_UP
);
1967 return log_link_error_errno(link
, r
, "Could not set link flags: %m");
1969 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
,
1970 callback
?: link_down_handler
,
1971 link_netlink_destroy_callback
, link
);
1973 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1980 static int link_group_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1985 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1988 r
= sd_netlink_message_get_errno(m
);
1990 log_link_message_warning_errno(link
, m
, r
, "Could not set group for the interface");
1995 static int link_set_group(Link
*link
) {
1996 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
2000 assert(link
->network
);
2001 assert(link
->manager
);
2002 assert(link
->manager
->rtnl
);
2004 if (link
->network
->group
<= 0)
2007 log_link_debug(link
, "Setting group");
2009 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
2011 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
2013 r
= sd_netlink_message_append_u32(req
, IFLA_GROUP
, link
->network
->group
);
2015 return log_link_error_errno(link
, r
, "Could not set link group: %m");
2017 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, link_group_handler
,
2018 link_netlink_destroy_callback
, link
);
2020 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
2027 static int link_handle_bound_to_list(Link
*link
) {
2030 bool required_up
= false;
2031 bool link_is_up
= false;
2035 if (hashmap_isempty(link
->bound_to_links
))
2038 if (link
->flags
& IFF_UP
)
2041 HASHMAP_FOREACH (l
, link
->bound_to_links
)
2042 if (link_has_carrier(l
)) {
2047 if (!required_up
&& link_is_up
) {
2048 r
= link_down(link
, NULL
);
2051 } else if (required_up
&& !link_is_up
) {
2060 static int link_handle_bound_by_list(Link
*link
) {
2066 if (hashmap_isempty(link
->bound_by_links
))
2069 HASHMAP_FOREACH (l
, link
->bound_by_links
) {
2070 r
= link_handle_bound_to_list(l
);
2078 static int link_put_carrier(Link
*link
, Link
*carrier
, Hashmap
**h
) {
2084 if (link
== carrier
)
2087 if (hashmap_get(*h
, INT_TO_PTR(carrier
->ifindex
)))
2090 r
= hashmap_ensure_allocated(h
, NULL
);
2094 r
= hashmap_put(*h
, INT_TO_PTR(carrier
->ifindex
), carrier
);
2101 static int link_new_bound_by_list(Link
*link
) {
2105 bool list_updated
= false;
2108 assert(link
->manager
);
2112 HASHMAP_FOREACH(carrier
, m
->links
) {
2113 if (!carrier
->network
)
2116 if (strv_isempty(carrier
->network
->bind_carrier
))
2119 if (strv_fnmatch(carrier
->network
->bind_carrier
, link
->ifname
)) {
2120 r
= link_put_carrier(link
, carrier
, &link
->bound_by_links
);
2124 list_updated
= true;
2131 HASHMAP_FOREACH(carrier
, link
->bound_by_links
) {
2132 r
= link_put_carrier(carrier
, link
, &carrier
->bound_to_links
);
2136 link_dirty(carrier
);
2142 static int link_new_bound_to_list(Link
*link
) {
2146 bool list_updated
= false;
2149 assert(link
->manager
);
2154 if (strv_isempty(link
->network
->bind_carrier
))
2159 HASHMAP_FOREACH (carrier
, m
->links
) {
2160 if (strv_fnmatch(link
->network
->bind_carrier
, carrier
->ifname
)) {
2161 r
= link_put_carrier(link
, carrier
, &link
->bound_to_links
);
2165 list_updated
= true;
2172 HASHMAP_FOREACH (carrier
, link
->bound_to_links
) {
2173 r
= link_put_carrier(carrier
, link
, &carrier
->bound_by_links
);
2177 link_dirty(carrier
);
2183 static int link_new_carrier_maps(Link
*link
) {
2186 r
= link_new_bound_by_list(link
);
2190 r
= link_handle_bound_by_list(link
);
2194 r
= link_new_bound_to_list(link
);
2198 r
= link_handle_bound_to_list(link
);
2205 static void link_free_bound_to_list(Link
*link
) {
2208 HASHMAP_FOREACH (bound_to
, link
->bound_to_links
) {
2209 hashmap_remove(link
->bound_to_links
, INT_TO_PTR(bound_to
->ifindex
));
2211 if (hashmap_remove(bound_to
->bound_by_links
, INT_TO_PTR(link
->ifindex
)))
2212 link_dirty(bound_to
);
2218 static void link_free_bound_by_list(Link
*link
) {
2221 HASHMAP_FOREACH (bound_by
, link
->bound_by_links
) {
2222 hashmap_remove(link
->bound_by_links
, INT_TO_PTR(bound_by
->ifindex
));
2224 if (hashmap_remove(bound_by
->bound_to_links
, INT_TO_PTR(link
->ifindex
))) {
2225 link_dirty(bound_by
);
2226 link_handle_bound_to_list(bound_by
);
2233 static void link_free_carrier_maps(Link
*link
) {
2234 bool list_updated
= false;
2238 if (!hashmap_isempty(link
->bound_to_links
)) {
2239 link_free_bound_to_list(link
);
2240 list_updated
= true;
2243 if (!hashmap_isempty(link
->bound_by_links
)) {
2244 link_free_bound_by_list(link
);
2245 list_updated
= true;
2254 static int link_append_to_master(Link
*link
, NetDev
*netdev
) {
2261 r
= link_get(link
->manager
, netdev
->ifindex
, &master
);
2265 r
= set_ensure_put(&master
->slaves
, NULL
, link
);
2273 static void link_drop_from_master(Link
*link
, NetDev
*netdev
) {
2278 if (!link
->manager
|| !netdev
)
2281 if (link_get(link
->manager
, netdev
->ifindex
, &master
) < 0)
2284 link_unref(set_remove(master
->slaves
, link
));
2287 static void link_detach_from_manager(Link
*link
) {
2288 if (!link
|| !link
->manager
)
2291 link_unref(set_remove(link
->manager
->links_requesting_uuid
, link
));
2294 /* The following must be called at last. */
2295 assert_se(hashmap_remove(link
->manager
->links
, INT_TO_PTR(link
->ifindex
)) == link
);
2299 void link_drop(Link
*link
) {
2300 if (!link
|| link
->state
== LINK_STATE_LINGER
)
2303 link_set_state(link
, LINK_STATE_LINGER
);
2305 link_free_carrier_maps(link
);
2307 if (link
->network
) {
2308 link_drop_from_master(link
, link
->network
->bridge
);
2309 link_drop_from_master(link
, link
->network
->bond
);
2312 log_link_debug(link
, "Link removed");
2314 (void) unlink(link
->state_file
);
2315 link_detach_from_manager(link
);
2318 static int link_joined(Link
*link
) {
2322 assert(link
->network
);
2324 if (!hashmap_isempty(link
->bound_to_links
)) {
2325 r
= link_handle_bound_to_list(link
);
2328 } else if (!(link
->flags
& IFF_UP
)) {
2331 link_enter_failed(link
);
2336 if (link
->network
->bridge
) {
2337 r
= link_set_bridge(link
);
2339 log_link_error_errno(link
, r
, "Could not set bridge message: %m");
2341 r
= link_append_to_master(link
, link
->network
->bridge
);
2343 log_link_error_errno(link
, r
, "Failed to add to bridge master's slave list: %m");
2346 if (link
->network
->bond
) {
2347 r
= link_set_bond(link
);
2349 log_link_error_errno(link
, r
, "Could not set bond message: %m");
2351 r
= link_append_to_master(link
, link
->network
->bond
);
2353 log_link_error_errno(link
, r
, "Failed to add to bond master's slave list: %m");
2356 if (link
->network
->use_br_vlan
&&
2357 (link
->network
->bridge
|| streq_ptr("bridge", link
->kind
))) {
2358 r
= link_set_bridge_vlan(link
);
2360 log_link_error_errno(link
, r
, "Could not set bridge vlan: %m");
2363 /* Skip setting up addresses until it gets carrier,
2364 or it would try to set addresses twice,
2365 which is bad for non-idempotent steps. */
2366 if (!link_has_carrier(link
) && !link
->network
->configure_without_carrier
)
2369 link_set_state(link
, LINK_STATE_CONFIGURING
);
2370 return link_request_set_addresses(link
);
2373 static int netdev_join_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
2377 assert(link
->network
);
2378 assert(link
->enslaving
> 0);
2382 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
2385 r
= sd_netlink_message_get_errno(m
);
2386 if (r
< 0 && r
!= -EEXIST
) {
2387 log_link_message_warning_errno(link
, m
, r
, "Could not join netdev");
2388 link_enter_failed(link
);
2392 log_link_debug(link
, "Joined netdev");
2394 if (link
->enslaving
== 0) {
2395 r
= link_joined(link
);
2397 link_enter_failed(link
);
2403 static int link_enter_join_netdev(Link
*link
) {
2408 assert(link
->network
);
2409 assert(link
->state
== LINK_STATE_INITIALIZED
);
2411 link_set_state(link
, LINK_STATE_CONFIGURING
);
2414 link
->enslaving
= 0;
2416 if (link
->network
->bond
) {
2417 if (link
->network
->bond
->state
== NETDEV_STATE_READY
&&
2418 link
->network
->bond
->ifindex
== link
->master_ifindex
)
2419 return link_joined(link
);
2421 log_struct(LOG_DEBUG
,
2422 LOG_LINK_INTERFACE(link
),
2423 LOG_NETDEV_INTERFACE(link
->network
->bond
),
2424 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", link
->network
->bond
->ifname
));
2428 r
= netdev_join(link
->network
->bond
, link
, netdev_join_handler
);
2430 log_struct_errno(LOG_WARNING
, r
,
2431 LOG_LINK_INTERFACE(link
),
2432 LOG_NETDEV_INTERFACE(link
->network
->bond
),
2433 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", link
->network
->bond
->ifname
));
2434 link_enter_failed(link
);
2439 if (link
->network
->bridge
) {
2440 log_struct(LOG_DEBUG
,
2441 LOG_LINK_INTERFACE(link
),
2442 LOG_NETDEV_INTERFACE(link
->network
->bridge
),
2443 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", link
->network
->bridge
->ifname
));
2447 r
= netdev_join(link
->network
->bridge
, link
, netdev_join_handler
);
2449 log_struct_errno(LOG_WARNING
, r
,
2450 LOG_LINK_INTERFACE(link
),
2451 LOG_NETDEV_INTERFACE(link
->network
->bridge
),
2452 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", link
->network
->bridge
->ifname
));
2453 link_enter_failed(link
);
2458 if (link
->network
->vrf
) {
2459 log_struct(LOG_DEBUG
,
2460 LOG_LINK_INTERFACE(link
),
2461 LOG_NETDEV_INTERFACE(link
->network
->vrf
),
2462 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", link
->network
->vrf
->ifname
));
2466 r
= netdev_join(link
->network
->vrf
, link
, netdev_join_handler
);
2468 log_struct_errno(LOG_WARNING
, r
,
2469 LOG_LINK_INTERFACE(link
),
2470 LOG_NETDEV_INTERFACE(link
->network
->vrf
),
2471 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", link
->network
->vrf
->ifname
));
2472 link_enter_failed(link
);
2477 HASHMAP_FOREACH(netdev
, link
->network
->stacked_netdevs
) {
2479 if (netdev
->ifindex
> 0)
2480 /* Assume already enslaved. */
2483 if (netdev_get_create_type(netdev
) != NETDEV_CREATE_STACKED
)
2486 log_struct(LOG_DEBUG
,
2487 LOG_LINK_INTERFACE(link
),
2488 LOG_NETDEV_INTERFACE(netdev
),
2489 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", netdev
->ifname
));
2493 r
= netdev_join(netdev
, link
, netdev_join_handler
);
2495 log_struct_errno(LOG_WARNING
, r
,
2496 LOG_LINK_INTERFACE(link
),
2497 LOG_NETDEV_INTERFACE(netdev
),
2498 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", netdev
->ifname
));
2499 link_enter_failed(link
);
2504 if (link
->enslaving
== 0)
2505 return link_joined(link
);
2510 static int link_set_ipv4_forward(Link
*link
) {
2513 if (!link_ipv4_forward_enabled(link
))
2516 /* We propagate the forwarding flag from one interface to the
2517 * global setting one way. This means: as long as at least one
2518 * interface was configured at any time that had IP forwarding
2519 * enabled the setting will stay on for good. We do this
2520 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2521 * somewhat in sync (see below). */
2523 r
= sysctl_write_ip_property(AF_INET
, NULL
, "ip_forward", "1");
2525 log_link_warning_errno(link
, r
, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
2530 static int link_set_ipv6_forward(Link
*link
) {
2533 if (!link_ipv6_forward_enabled(link
))
2536 /* On Linux, the IPv6 stack does not know a per-interface
2537 * packet forwarding setting: either packet forwarding is on
2538 * for all, or off for all. We hence don't bother with a
2539 * per-interface setting, but simply propagate the interface
2540 * flag, if it is set, to the global flag, one-way. Note that
2541 * while IPv4 would allow a per-interface flag, we expose the
2542 * same behaviour there and also propagate the setting from
2543 * one to all, to keep things simple (see above). */
2545 r
= sysctl_write_ip_property(AF_INET6
, "all", "forwarding", "1");
2547 log_link_warning_errno(link
, r
, "Cannot configure IPv6 packet forwarding, ignoring: %m");
2552 static int link_set_ipv6_privacy_extensions(Link
*link
) {
2553 IPv6PrivacyExtensions s
;
2556 s
= link_ipv6_privacy_extensions(link
);
2560 r
= sysctl_write_ip_property_int(AF_INET6
, link
->ifname
, "use_tempaddr", (int) link
->network
->ipv6_privacy_extensions
);
2562 log_link_warning_errno(link
, r
, "Cannot configure IPv6 privacy extension for interface: %m");
2567 static int link_set_ipv6_accept_ra(Link
*link
) {
2570 /* Make this a NOP if IPv6 is not available */
2571 if (!socket_ipv6_is_supported())
2574 if (link
->flags
& IFF_LOOPBACK
)
2580 r
= sysctl_write_ip_property(AF_INET6
, link
->ifname
, "accept_ra", "0");
2582 log_link_warning_errno(link
, r
, "Cannot disable kernel IPv6 accept_ra for interface: %m");
2587 static int link_set_ipv6_dad_transmits(Link
*link
) {
2590 /* Make this a NOP if IPv6 is not available */
2591 if (!socket_ipv6_is_supported())
2594 if (link
->flags
& IFF_LOOPBACK
)
2600 if (link
->network
->ipv6_dad_transmits
< 0)
2603 r
= sysctl_write_ip_property_int(AF_INET6
, link
->ifname
, "dad_transmits", link
->network
->ipv6_dad_transmits
);
2605 log_link_warning_errno(link
, r
, "Cannot set IPv6 dad transmits for interface: %m");
2610 static int link_set_ipv6_hop_limit(Link
*link
) {
2613 /* Make this a NOP if IPv6 is not available */
2614 if (!socket_ipv6_is_supported())
2617 if (link
->flags
& IFF_LOOPBACK
)
2623 if (link
->network
->ipv6_hop_limit
< 0)
2626 r
= sysctl_write_ip_property_int(AF_INET6
, link
->ifname
, "hop_limit", link
->network
->ipv6_hop_limit
);
2628 log_link_warning_errno(link
, r
, "Cannot set IPv6 hop limit for interface: %m");
2633 static int link_set_ipv6_mtu(Link
*link
) {
2636 /* Make this a NOP if IPv6 is not available */
2637 if (!socket_ipv6_is_supported())
2640 if (link
->flags
& IFF_LOOPBACK
)
2643 if (link
->network
->ipv6_mtu
== 0)
2646 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
2647 * on the interface. Bump up IPv6 MTU bytes to IPV6_MTU_MIN. */
2648 if (link
->network
->ipv6_mtu
< IPV6_MIN_MTU
) {
2649 log_link_notice(link
, "Bumping IPv6 MTU to "STRINGIFY(IPV6_MIN_MTU
)" byte minimum required");
2650 link
->network
->ipv6_mtu
= IPV6_MIN_MTU
;
2653 r
= sysctl_write_ip_property_uint32(AF_INET6
, link
->ifname
, "mtu", link
->network
->ipv6_mtu
);
2655 if (link
->mtu
< link
->network
->ipv6_mtu
)
2656 log_link_warning(link
, "Cannot set IPv6 MTU %"PRIu32
" higher than device MTU %"PRIu32
,
2657 link
->network
->ipv6_mtu
, link
->mtu
);
2659 log_link_warning_errno(link
, r
, "Cannot set IPv6 MTU for interface: %m");
2662 link
->ipv6_mtu_set
= true;
2667 static int link_set_ipv4_accept_local(Link
*link
) {
2670 if (link
->flags
& IFF_LOOPBACK
)
2673 if (link
->network
->ipv4_accept_local
< 0)
2676 r
= sysctl_write_ip_property_boolean(AF_INET
, link
->ifname
, "accept_local", link
->network
->ipv4_accept_local
);
2678 log_link_warning_errno(link
, r
, "Cannot set IPv4 accept_local flag for interface: %m");
2683 static bool link_is_static_address_configured(Link
*link
, Address
*address
) {
2684 Address
*net_address
;
2692 LIST_FOREACH(addresses
, net_address
, link
->network
->static_addresses
)
2693 if (address_equal(net_address
, address
))
2695 else if (address
->family
== AF_INET6
&& net_address
->family
== AF_INET6
&&
2696 in_addr_equal(AF_INET6
, &address
->in_addr
, &net_address
->in_addr_peer
) > 0)
2702 static bool link_is_neighbor_configured(Link
*link
, Neighbor
*neighbor
) {
2703 Neighbor
*net_neighbor
;
2711 LIST_FOREACH(neighbors
, net_neighbor
, link
->network
->neighbors
)
2712 if (neighbor_equal(net_neighbor
, neighbor
))
2718 static bool link_is_static_route_configured(Link
*link
, Route
*route
) {
2727 LIST_FOREACH(routes
, net_route
, link
->network
->static_routes
)
2728 if (route_equal(net_route
, route
))
2734 static bool link_address_is_dynamic(Link
*link
, Address
*address
) {
2740 if (address
->cinfo
.ifa_prefered
!= CACHE_INFO_INFINITY_LIFE_TIME
)
2743 /* Even when the address is leased from a DHCP server, networkd assign the address
2744 * without lifetime when KeepConfiguration=dhcp. So, let's check that we have
2745 * corresponding routes with RTPROT_DHCP. */
2746 SET_FOREACH(route
, link
->routes_foreign
) {
2747 if (route
->protocol
!= RTPROT_DHCP
)
2750 if (address
->family
!= route
->family
)
2753 if (in_addr_equal(address
->family
, &address
->in_addr
, &route
->prefsrc
))
2760 static int link_enumerate_ipv6_tentative_addresses(Link
*link
) {
2761 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
, *reply
= NULL
;
2762 sd_netlink_message
*addr
;
2766 assert(link
->manager
);
2767 assert(link
->manager
->rtnl
);
2769 r
= sd_rtnl_message_new_addr(link
->manager
->rtnl
, &req
, RTM_GETADDR
, 0, AF_INET6
);
2773 r
= sd_netlink_call(link
->manager
->rtnl
, req
, 0, &reply
);
2777 for (addr
= reply
; addr
; addr
= sd_netlink_message_next(addr
)) {
2778 unsigned char flags
;
2781 r
= sd_rtnl_message_addr_get_ifindex(addr
, &ifindex
);
2783 log_link_warning_errno(link
, r
, "rtnl: invalid ifindex, ignoring: %m");
2785 } else if (link
->ifindex
!= ifindex
)
2788 r
= sd_rtnl_message_addr_get_flags(addr
, &flags
);
2790 log_link_warning_errno(link
, r
, "rtnl: received address message with invalid flags, ignoring: %m");
2792 } else if (!(flags
& IFA_F_TENTATIVE
))
2795 log_link_debug(link
, "Found tentative ipv6 link-local address");
2796 (void) manager_rtnl_process_address(link
->manager
->rtnl
, addr
, link
->manager
);
2802 static int link_drop_foreign_config(Link
*link
) {
2808 /* The kernel doesn't notify us about tentative addresses;
2809 * so if ipv6ll is disabled, we need to enumerate them now so we can drop them below */
2810 if (!link_ipv6ll_enabled(link
)) {
2811 r
= link_enumerate_ipv6_tentative_addresses(link
);
2816 SET_FOREACH(address
, link
->addresses_foreign
) {
2817 /* we consider IPv6LL addresses to be managed by the kernel */
2818 if (address
->family
== AF_INET6
&& in_addr_is_link_local(AF_INET6
, &address
->in_addr
) == 1 && link_ipv6ll_enabled(link
))
2821 if (link_address_is_dynamic(link
, address
)) {
2822 if (link
->network
&& FLAGS_SET(link
->network
->keep_configuration
, KEEP_CONFIGURATION_DHCP
))
2824 } else if (link
->network
&& FLAGS_SET(link
->network
->keep_configuration
, KEEP_CONFIGURATION_STATIC
))
2827 if (link_is_static_address_configured(link
, address
)) {
2828 r
= address_add(link
, address
->family
, &address
->in_addr
, address
->prefixlen
, NULL
);
2830 return log_link_error_errno(link
, r
, "Failed to add address: %m");
2832 r
= address_remove(address
, link
, NULL
);
2838 SET_FOREACH(neighbor
, link
->neighbors_foreign
) {
2839 if (link_is_neighbor_configured(link
, neighbor
)) {
2840 r
= neighbor_add(link
, neighbor
->family
, &neighbor
->in_addr
, &neighbor
->lladdr
, neighbor
->lladdr_size
, NULL
);
2844 r
= neighbor_remove(neighbor
, link
, NULL
);
2850 SET_FOREACH(route
, link
->routes_foreign
) {
2851 /* do not touch routes managed by the kernel */
2852 if (route
->protocol
== RTPROT_KERNEL
)
2855 /* do not touch multicast route added by kernel */
2856 /* FIXME: Why the kernel adds this route with protocol RTPROT_BOOT??? We need to investigate that.
2857 * https://tools.ietf.org/html/rfc4862#section-5.4 may explain why. */
2858 if (route
->protocol
== RTPROT_BOOT
&&
2859 route
->family
== AF_INET6
&&
2860 route
->dst_prefixlen
== 8 &&
2861 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 }}} }))
2864 if (route
->protocol
== RTPROT_STATIC
&& link
->network
&&
2865 FLAGS_SET(link
->network
->keep_configuration
, KEEP_CONFIGURATION_STATIC
))
2868 if (route
->protocol
== RTPROT_DHCP
&& link
->network
&&
2869 FLAGS_SET(link
->network
->keep_configuration
, KEEP_CONFIGURATION_DHCP
))
2872 if (link_is_static_route_configured(link
, route
)) {
2873 r
= route_add(link
, route
, NULL
);
2877 r
= route_remove(route
, link
, NULL
);
2886 static int remove_static_address_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
2891 assert(link
->ifname
);
2892 assert(link
->address_remove_messages
> 0);
2894 link
->address_remove_messages
--;
2896 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
2899 r
= sd_netlink_message_get_errno(m
);
2900 if (r
< 0 && r
!= -EADDRNOTAVAIL
)
2901 log_link_message_warning_errno(link
, m
, r
, "Could not drop address");
2903 (void) manager_rtnl_process_address(rtnl
, m
, link
->manager
);
2905 if (link
->address_remove_messages
== 0 && link
->request_static_addresses
) {
2906 link_set_state(link
, LINK_STATE_CONFIGURING
);
2907 r
= link_request_set_addresses(link
);
2909 link_enter_failed(link
);
2915 static int link_drop_config(Link
*link
) {
2916 Address
*address
, *pool_address
;
2921 SET_FOREACH(address
, link
->addresses
) {
2922 /* we consider IPv6LL addresses to be managed by the kernel */
2923 if (address
->family
== AF_INET6
&& in_addr_is_link_local(AF_INET6
, &address
->in_addr
) == 1 && link_ipv6ll_enabled(link
))
2926 r
= address_remove(address
, link
, remove_static_address_handler
);
2930 link
->address_remove_messages
++;
2932 /* If this address came from an address pool, clean up the pool */
2933 LIST_FOREACH(addresses
, pool_address
, link
->pool_addresses
)
2934 if (address_equal(address
, pool_address
)) {
2935 LIST_REMOVE(addresses
, link
->pool_addresses
, pool_address
);
2936 address_free(pool_address
);
2941 SET_FOREACH(neighbor
, link
->neighbors
) {
2942 r
= neighbor_remove(neighbor
, link
, NULL
);
2947 SET_FOREACH(route
, link
->routes
) {
2948 /* do not touch routes managed by the kernel */
2949 if (route
->protocol
== RTPROT_KERNEL
)
2952 r
= route_remove(route
, link
, NULL
);
2962 static int link_configure_ipv4_dad(Link
*link
) {
2967 assert(link
->network
);
2969 LIST_FOREACH(addresses
, address
, link
->network
->static_addresses
)
2970 if (address
->family
== AF_INET
&&
2971 FLAGS_SET(address
->duplicate_address_detection
, ADDRESS_FAMILY_IPV4
)) {
2972 r
= configure_ipv4_duplicate_address_detection(link
, address
);
2974 return log_link_error_errno(link
, r
, "Failed to configure IPv4ACD: %m");
2980 static int link_configure_traffic_control(Link
*link
) {
2984 link
->tc_configured
= false;
2985 link
->tc_messages
= 0;
2987 ORDERED_HASHMAP_FOREACH(tc
, link
->network
->tc_by_section
) {
2988 r
= traffic_control_configure(link
, tc
);
2993 if (link
->tc_messages
== 0)
2994 link
->tc_configured
= true;
2996 log_link_debug(link
, "Configuring traffic control");
3001 static int link_configure_sr_iov(Link
*link
) {
3005 link
->sr_iov_configured
= false;
3006 link
->sr_iov_messages
= 0;
3008 ORDERED_HASHMAP_FOREACH(sr_iov
, link
->network
->sr_iov_by_section
) {
3009 r
= sr_iov_configure(link
, sr_iov
);
3014 if (link
->sr_iov_messages
== 0)
3015 link
->sr_iov_configured
= true;
3017 log_link_debug(link
, "Configuring SR-IOV");
3022 static int link_configure(Link
*link
) {
3026 assert(link
->network
);
3027 assert(link
->state
== LINK_STATE_INITIALIZED
);
3029 r
= link_configure_traffic_control(link
);
3033 r
= link_configure_sr_iov(link
);
3037 if (link
->iftype
== ARPHRD_CAN
)
3038 return link_configure_can(link
);
3040 /* If IPv6 configured that is static IPv6 address and IPv6LL autoconfiguration is enabled
3041 * for this interface, then enable IPv6 */
3042 (void) link_update_ipv6_sysctl(link
);
3044 r
= link_set_proxy_arp(link
);
3048 r
= ipv6_proxy_ndp_addresses_configure(link
);
3052 r
= link_set_ipv4_forward(link
);
3056 r
= link_set_ipv6_forward(link
);
3060 r
= link_set_ipv6_privacy_extensions(link
);
3064 r
= link_set_ipv6_accept_ra(link
);
3068 r
= link_set_ipv6_dad_transmits(link
);
3072 r
= link_set_ipv6_hop_limit(link
);
3076 r
= link_set_ipv4_accept_local(link
);
3080 r
= link_set_flags(link
);
3084 r
= link_set_group(link
);
3088 if (link_ipv4ll_enabled(link
, ADDRESS_FAMILY_IPV4
| ADDRESS_FAMILY_FALLBACK_IPV4
)) {
3089 r
= ipv4ll_configure(link
);
3094 if (link_dhcp4_enabled(link
)) {
3095 r
= dhcp4_set_promote_secondaries(link
);
3099 r
= dhcp4_configure(link
);
3104 if (link_dhcp4_server_enabled(link
)) {
3105 r
= sd_dhcp_server_new(&link
->dhcp_server
, link
->ifindex
);
3109 r
= sd_dhcp_server_attach_event(link
->dhcp_server
, NULL
, 0);
3114 if (link_dhcp6_enabled(link
) ||
3115 link_ipv6_accept_ra_enabled(link
)) {
3116 r
= dhcp6_configure(link
);
3121 if (link_ipv6_accept_ra_enabled(link
)) {
3122 r
= ndisc_configure(link
);
3127 if (link_radv_enabled(link
)) {
3128 r
= radv_configure(link
);
3133 if (link_lldp_rx_enabled(link
)) {
3134 r
= link_lldp_rx_configure(link
);
3139 r
= link_configure_mtu(link
);
3143 r
= link_configure_addrgen_mode(link
);
3147 r
= link_configure_ipv4_dad(link
);
3151 return link_configure_continue(link
);
3154 /* The configuration continues in this separate function, instead of
3155 * including this in the above link_configure() function, for two
3157 * 1) some devices reset the link when the mtu is set, which caused
3158 * an infinite loop here in networkd; see:
3159 * https://github.com/systemd/systemd/issues/6593
3160 * https://github.com/systemd/systemd/issues/9831
3161 * 2) if ipv6ll is disabled, then bringing the interface up must be
3162 * delayed until after we get confirmation from the kernel that
3163 * the addr_gen_mode parameter has been set (via netlink), see:
3164 * https://github.com/systemd/systemd/issues/13882
3166 static int link_configure_continue(Link
*link
) {
3170 assert(link
->network
);
3171 assert(link
->state
== LINK_STATE_INITIALIZED
);
3173 if (link
->setting_mtu
|| link
->setting_genmode
)
3176 /* Drop foreign config, but ignore loopback or critical devices.
3177 * We do not want to remove loopback address or addresses used for root NFS. */
3178 if (!(link
->flags
& IFF_LOOPBACK
) &&
3179 link
->network
->keep_configuration
!= KEEP_CONFIGURATION_YES
) {
3180 r
= link_drop_foreign_config(link
);
3185 /* The kernel resets ipv6 mtu after changing device mtu;
3186 * we must set this here, after we've set device mtu */
3187 r
= link_set_ipv6_mtu(link
);
3191 if (link_has_carrier(link
) || link
->network
->configure_without_carrier
) {
3192 r
= link_acquire_conf(link
);
3197 return link_enter_join_netdev(link
);
3200 static int duid_set_uuid(DUID
*duid
, sd_id128_t uuid
) {
3203 if (duid
->raw_data_len
> 0)
3206 if (duid
->type
!= DUID_TYPE_UUID
)
3209 memcpy(&duid
->raw_data
, &uuid
, sizeof(sd_id128_t
));
3210 duid
->raw_data_len
= sizeof(sd_id128_t
);
3215 int get_product_uuid_handler(sd_bus_message
*m
, void *userdata
, sd_bus_error
*ret_error
) {
3216 Manager
*manager
= userdata
;
3217 const sd_bus_error
*e
;
3227 e
= sd_bus_message_get_error(m
);
3229 log_error_errno(sd_bus_error_get_errno(e
),
3230 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
3235 r
= sd_bus_message_read_array(m
, 'y', &a
, &sz
);
3239 if (sz
!= sizeof(sd_id128_t
)) {
3240 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
3244 memcpy(&manager
->product_uuid
, a
, sz
);
3245 while ((duid
= set_steal_first(manager
->duids_requesting_uuid
)))
3246 (void) duid_set_uuid(duid
, manager
->product_uuid
);
3248 manager
->duids_requesting_uuid
= set_free(manager
->duids_requesting_uuid
);
3251 while ((link
= set_steal_first(manager
->links_requesting_uuid
))) {
3254 r
= link_configure(link
);
3256 link_enter_failed(link
);
3259 manager
->links_requesting_uuid
= set_free(manager
->links_requesting_uuid
);
3261 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
3262 * even if the method fails. */
3263 manager
->has_product_uuid
= true;
3268 static bool link_requires_uuid(Link
*link
) {
3272 assert(link
->manager
);
3273 assert(link
->network
);
3275 duid
= link_get_duid(link
);
3276 if (duid
->type
!= DUID_TYPE_UUID
|| duid
->raw_data_len
!= 0)
3279 if (link_dhcp4_enabled(link
) && IN_SET(link
->network
->dhcp_client_identifier
, DHCP_CLIENT_ID_DUID
, DHCP_CLIENT_ID_DUID_ONLY
))
3282 if (link_dhcp6_enabled(link
) || link_ipv6_accept_ra_enabled(link
))
3288 static int link_configure_duid(Link
*link
) {
3294 assert(link
->manager
);
3295 assert(link
->network
);
3298 duid
= link_get_duid(link
);
3300 if (!link_requires_uuid(link
))
3303 if (m
->has_product_uuid
) {
3304 (void) duid_set_uuid(duid
, m
->product_uuid
);
3308 if (!m
->links_requesting_uuid
) {
3309 r
= manager_request_product_uuid(m
, link
);
3314 log_link_warning_errno(link
, r
,
3315 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
3319 r
= set_put(m
->links_requesting_uuid
, link
);
3325 r
= set_put(m
->duids_requesting_uuid
, duid
);
3333 static int link_reconfigure_internal(Link
*link
, sd_netlink_message
*m
, bool force
) {
3338 _cleanup_strv_free_
char **s
= NULL
;
3340 r
= sd_netlink_message_get_errno(m
);
3344 r
= sd_netlink_message_read_strv(m
, IFLA_PROP_LIST
, IFLA_ALT_IFNAME
, &s
);
3345 if (r
< 0 && r
!= -ENODATA
)
3348 strv_free_and_replace(link
->alternative_names
, s
);
3351 r
= network_get(link
->manager
, link
->iftype
, link
->sd_device
,
3352 link
->ifname
, link
->alternative_names
, link
->driver
,
3353 &link
->mac
, &link
->permanent_mac
,
3354 link
->wlan_iftype
, link
->ssid
, &link
->bssid
, &network
);
3356 link_enter_unmanaged(link
);
3358 } else if (r
== 0 && network
->unmanaged
) {
3359 link_enter_unmanaged(link
);
3364 if (link
->network
== network
&& !force
)
3367 log_link_info(link
, "Re-configuring with %s", network
->filename
);
3369 /* Dropping old .network file */
3370 r
= link_stop_clients(link
, false);
3374 if (link_dhcp4_server_enabled(link
))
3375 (void) sd_dhcp_server_stop(link
->dhcp_server
);
3377 r
= link_drop_config(link
);
3381 if (!IN_SET(link
->state
, LINK_STATE_UNMANAGED
, LINK_STATE_PENDING
, LINK_STATE_INITIALIZED
)) {
3382 log_link_debug(link
, "State is %s, dropping config", link_state_to_string(link
->state
));
3383 r
= link_drop_foreign_config(link
);
3388 link_free_carrier_maps(link
);
3389 link_free_engines(link
);
3390 link
->network
= network_unref(link
->network
);
3392 /* Then, apply new .network file */
3393 r
= network_apply(network
, link
);
3397 r
= link_new_carrier_maps(link
);
3401 link_set_state(link
, LINK_STATE_INITIALIZED
);
3404 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3405 * link_configure() is called later asynchronously. */
3406 r
= link_configure_duid(link
);
3410 r
= link_configure(link
);
3417 static int link_reconfigure_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
3420 r
= link_reconfigure_internal(link
, m
, false);
3422 link_enter_failed(link
);
3427 static int link_force_reconfigure_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
3430 r
= link_reconfigure_internal(link
, m
, true);
3432 link_enter_failed(link
);
3437 int link_reconfigure(Link
*link
, bool force
) {
3438 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
3441 if (IN_SET(link
->state
, LINK_STATE_PENDING
, LINK_STATE_LINGER
))
3444 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_GETLINK
,
3449 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
,
3450 force
? link_force_reconfigure_handler
: link_reconfigure_handler
,
3451 link_netlink_destroy_callback
, link
);
3460 static int link_initialized_and_synced(Link
*link
) {
3465 assert(link
->ifname
);
3466 assert(link
->manager
);
3468 /* We may get called either from the asynchronous netlink callback,
3469 * or directly for link_add() if running in a container. See link_add(). */
3470 if (!IN_SET(link
->state
, LINK_STATE_PENDING
, LINK_STATE_INITIALIZED
))
3473 log_link_debug(link
, "Link state is up-to-date");
3474 link_set_state(link
, LINK_STATE_INITIALIZED
);
3476 r
= link_new_bound_by_list(link
);
3480 r
= link_handle_bound_by_list(link
);
3484 if (!link
->network
) {
3485 r
= wifi_get_info(link
);
3489 r
= network_get(link
->manager
, link
->iftype
, link
->sd_device
,
3490 link
->ifname
, link
->alternative_names
, link
->driver
,
3491 &link
->mac
, &link
->permanent_mac
,
3492 link
->wlan_iftype
, link
->ssid
, &link
->bssid
, &network
);
3494 link_enter_unmanaged(link
);
3496 } else if (r
== 0 && network
->unmanaged
) {
3497 link_enter_unmanaged(link
);
3502 if (link
->flags
& IFF_LOOPBACK
) {
3503 if (network
->link_local
!= ADDRESS_FAMILY_NO
)
3504 log_link_debug(link
, "Ignoring link-local autoconfiguration for loopback link");
3506 if (network
->dhcp
!= ADDRESS_FAMILY_NO
)
3507 log_link_debug(link
, "Ignoring DHCP clients for loopback link");
3509 if (network
->dhcp_server
)
3510 log_link_debug(link
, "Ignoring DHCP server for loopback link");
3513 r
= network_apply(network
, link
);
3518 r
= link_new_bound_to_list(link
);
3522 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3523 * link_configure() is called later asynchronously. */
3524 r
= link_configure_duid(link
);
3528 r
= link_configure(link
);
3535 static int link_initialized_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
3536 _cleanup_strv_free_
char **s
= NULL
;
3539 r
= sd_netlink_message_get_errno(m
);
3541 log_link_warning_errno(link
, r
, "Failed to wait for the interface to be initialized: %m");
3542 link_enter_failed(link
);
3546 r
= sd_netlink_message_read_strv(m
, IFLA_PROP_LIST
, IFLA_ALT_IFNAME
, &s
);
3547 if (r
< 0 && r
!= -ENODATA
) {
3548 link_enter_failed(link
);
3552 strv_free_and_replace(link
->alternative_names
, s
);
3554 r
= link_initialized_and_synced(link
);
3556 link_enter_failed(link
);
3560 int link_initialized(Link
*link
, sd_device
*device
) {
3561 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
3565 assert(link
->manager
);
3566 assert(link
->manager
->rtnl
);
3569 if (link
->state
!= LINK_STATE_PENDING
)
3572 if (link
->sd_device
)
3575 log_link_debug(link
, "udev initialized link");
3576 link_set_state(link
, LINK_STATE_INITIALIZED
);
3578 link
->sd_device
= sd_device_ref(device
);
3580 /* udev has initialized the link, but we don't know if we have yet
3581 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3582 * when it returns we know that the pending NEWLINKs have already been
3583 * processed and that we are up-to-date */
3585 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_GETLINK
,
3590 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, link_initialized_handler
,
3591 link_netlink_destroy_callback
, link
);
3600 static int link_load(Link
*link
) {
3601 _cleanup_free_
char *network_file
= NULL
,
3604 *dhcp4_address
= NULL
,
3605 *ipv4ll_address
= NULL
;
3606 union in_addr_union address
;
3611 r
= parse_env_file(NULL
, link
->state_file
,
3612 "NETWORK_FILE", &network_file
,
3613 "ADDRESSES", &addresses
,
3615 "DHCP4_ADDRESS", &dhcp4_address
,
3616 "IPV4LL_ADDRESS", &ipv4ll_address
);
3617 if (r
< 0 && r
!= -ENOENT
)
3618 return log_link_error_errno(link
, r
, "Failed to read %s: %m", link
->state_file
);
3625 suffix
= strrchr(network_file
, '.');
3627 log_link_debug(link
, "Failed to get network name from %s", network_file
);
3628 goto network_file_fail
;
3632 r
= network_get_by_name(link
->manager
, basename(network_file
), &network
);
3634 log_link_debug_errno(link
, r
, "Failed to get network %s: %m", basename(network_file
));
3635 goto network_file_fail
;
3638 r
= network_apply(network
, link
);
3640 return log_link_error_errno(link
, r
, "Failed to apply network %s: %m", basename(network_file
));
3645 for (const char *p
= addresses
; p
; ) {
3646 _cleanup_free_
char *address_str
= NULL
;
3647 char *prefixlen_str
;
3649 unsigned char prefixlen
;
3651 r
= extract_first_word(&p
, &address_str
, NULL
, 0);
3653 log_link_warning_errno(link
, r
, "failed to parse ADDRESSES: %m");
3657 prefixlen_str
= strchr(address_str
, '/');
3658 if (!prefixlen_str
) {
3659 log_link_debug(link
, "Failed to parse address and prefix length %s", address_str
);
3662 *prefixlen_str
++ = '\0';
3664 r
= sscanf(prefixlen_str
, "%hhu", &prefixlen
);
3666 log_link_error(link
, "Failed to parse prefixlen %s", prefixlen_str
);
3670 r
= in_addr_from_string_auto(address_str
, &family
, &address
);
3672 log_link_debug_errno(link
, r
, "Failed to parse address %s: %m", address_str
);
3676 r
= address_add(link
, family
, &address
, prefixlen
, NULL
);
3678 return log_link_error_errno(link
, r
, "Failed to add address: %m");
3681 for (const char *p
= routes
; p
; ) {
3682 _cleanup_(sd_event_source_unrefp
) sd_event_source
*expire
= NULL
;
3683 _cleanup_(route_freep
) Route
*tmp
= NULL
;
3684 _cleanup_free_
char *route_str
= NULL
;
3685 char *prefixlen_str
;
3688 r
= extract_first_word(&p
, &route_str
, NULL
, 0);
3690 log_link_debug_errno(link
, r
, "failed to parse ROUTES: %m");
3694 prefixlen_str
= strchr(route_str
, '/');
3695 if (!prefixlen_str
) {
3696 log_link_debug(link
, "Failed to parse route %s", route_str
);
3699 *prefixlen_str
++ = '\0';
3701 r
= route_new(&tmp
);
3705 r
= sscanf(prefixlen_str
,
3706 "%hhu/%hhu/%"SCNu32
"/%"PRIu32
"/"USEC_FMT
,
3707 &tmp
->dst_prefixlen
,
3713 log_link_debug(link
,
3714 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3719 r
= in_addr_from_string_auto(route_str
, &tmp
->family
, &tmp
->dst
);
3721 log_link_debug_errno(link
, r
, "Failed to parse route destination %s: %m", route_str
);
3725 r
= route_add(link
, tmp
, &route
);
3727 return log_link_error_errno(link
, r
, "Failed to add route: %m");
3729 if (route
->lifetime
!= USEC_INFINITY
&& !kernel_route_expiration_supported()) {
3730 r
= sd_event_add_time(link
->manager
->event
, &expire
,
3731 clock_boottime_or_monotonic(),
3732 route
->lifetime
, 0, route_expire_handler
, route
);
3734 log_link_warning_errno(link
, r
, "Could not arm route expiration handler: %m");
3737 sd_event_source_unref(route
->expire
);
3738 route
->expire
= TAKE_PTR(expire
);
3741 if (dhcp4_address
) {
3742 r
= in_addr_from_string(AF_INET
, dhcp4_address
, &address
);
3744 log_link_debug_errno(link
, r
, "Failed to parse DHCPv4 address %s: %m", dhcp4_address
);
3745 goto dhcp4_address_fail
;
3748 r
= sd_dhcp_client_new(&link
->dhcp_client
, link
->network
? link
->network
->dhcp_anonymize
: 0);
3750 return log_link_error_errno(link
, r
, "Failed to create DHCPv4 client: %m");
3752 r
= sd_dhcp_client_attach_event(link
->dhcp_client
, NULL
, 0);
3754 return log_link_error_errno(link
, r
, "Failed to attach DHCPv4 event: %m");
3756 r
= sd_dhcp_client_set_request_address(link
->dhcp_client
, &address
.in
);
3758 return log_link_error_errno(link
, r
, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address
);
3763 if (ipv4ll_address
) {
3764 r
= in_addr_from_string(AF_INET
, ipv4ll_address
, &address
);
3766 log_link_debug_errno(link
, r
, "Failed to parse IPv4LL address %s: %m", ipv4ll_address
);
3767 goto ipv4ll_address_fail
;
3770 r
= sd_ipv4ll_new(&link
->ipv4ll
);
3772 return log_link_error_errno(link
, r
, "Failed to create IPv4LL client: %m");
3774 r
= sd_ipv4ll_attach_event(link
->ipv4ll
, NULL
, 0);
3776 return log_link_error_errno(link
, r
, "Failed to attach IPv4LL event: %m");
3778 r
= sd_ipv4ll_set_address(link
->ipv4ll
, &address
.in
);
3780 return log_link_error_errno(link
, r
, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address
);
3783 ipv4ll_address_fail
:
3788 int link_add(Manager
*m
, sd_netlink_message
*message
, Link
**ret
) {
3789 _cleanup_(sd_device_unrefp
) sd_device
*device
= NULL
;
3790 char ifindex_str
[2 + DECIMAL_STR_MAX(int)];
3799 r
= link_new(m
, message
, ret
);
3805 log_link_debug(link
, "Link %d added", link
->ifindex
);
3807 r
= link_load(link
);
3811 if (path_is_read_only_fs("/sys") <= 0) {
3812 /* udev should be around */
3813 sprintf(ifindex_str
, "n%d", link
->ifindex
);
3814 r
= sd_device_new_from_device_id(&device
, ifindex_str
);
3816 log_link_warning_errno(link
, r
, "Could not find device, waiting for device initialization: %m");
3820 r
= sd_device_get_is_initialized(device
);
3822 log_link_warning_errno(link
, r
, "Could not determine whether the device is initialized: %m");
3827 log_link_debug(link
, "link pending udev initialization...");
3831 r
= device_is_renaming(device
);
3833 log_link_warning_errno(link
, r
, "Failed to determine the device is being renamed: %m");
3837 log_link_debug(link
, "Interface is being renamed, pending initialization.");
3841 r
= link_initialized(link
, device
);
3845 r
= link_initialized_and_synced(link
);
3852 link_enter_failed(link
);
3856 int link_ipv6ll_gained(Link
*link
, const struct in6_addr
*address
) {
3861 log_link_info(link
, "Gained IPv6LL");
3863 link
->ipv6ll_address
= *address
;
3864 link_check_ready(link
);
3866 if (IN_SET(link
->state
, LINK_STATE_CONFIGURING
, LINK_STATE_CONFIGURED
)) {
3867 r
= link_acquire_ipv6_conf(link
);
3869 link_enter_failed(link
);
3877 static int link_carrier_gained(Link
*link
) {
3882 r
= wifi_get_info(link
);
3886 r
= link_reconfigure_internal(link
, NULL
, false);
3888 link_enter_failed(link
);
3893 if (IN_SET(link
->state
, LINK_STATE_CONFIGURING
, LINK_STATE_CONFIGURED
)) {
3894 r
= link_acquire_conf(link
);
3896 link_enter_failed(link
);
3900 link_set_state(link
, LINK_STATE_CONFIGURING
);
3901 r
= link_request_set_addresses(link
);
3906 r
= link_handle_bound_by_list(link
);
3913 static int link_carrier_lost(Link
*link
) {
3918 if (link
->network
&& link
->network
->ignore_carrier_loss
)
3921 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
3922 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3923 * configuration and stop the clients as well. */
3924 if (link
->setting_mtu
)
3927 r
= link_stop_clients(link
, false);
3929 link_enter_failed(link
);
3933 if (link_dhcp4_server_enabled(link
))
3934 (void) sd_dhcp_server_stop(link
->dhcp_server
);
3936 r
= link_drop_config(link
);
3940 if (!IN_SET(link
->state
, LINK_STATE_UNMANAGED
, LINK_STATE_PENDING
, LINK_STATE_INITIALIZED
)) {
3941 log_link_debug(link
, "State is %s, dropping config", link_state_to_string(link
->state
));
3942 r
= link_drop_foreign_config(link
);
3947 r
= link_handle_bound_by_list(link
);
3954 int link_carrier_reset(Link
*link
) {
3959 if (link_has_carrier(link
)) {
3960 r
= link_carrier_lost(link
);
3964 r
= link_carrier_gained(link
);
3968 log_link_info(link
, "Reset carrier");
3974 /* This is called every time an interface admin state changes to up;
3975 * specifically, when IFF_UP flag changes from unset to set */
3976 static int link_admin_state_up(Link
*link
) {
3979 /* We set the ipv6 mtu after the device mtu, but the kernel resets
3980 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
3981 * ipv6_mtu_set prevents this from trying to set it too early before
3982 * the link->network has been setup; we only need to reset it
3983 * here if we've already set it during normal initialization. */
3984 if (link
->ipv6_mtu_set
) {
3985 r
= link_set_ipv6_mtu(link
);
3993 int link_update(Link
*link
, sd_netlink_message
*m
) {
3994 _cleanup_strv_free_
char **s
= NULL
;
3995 struct ether_addr mac
;
3998 bool had_carrier
, carrier_gained
, carrier_lost
, link_was_admin_up
;
4002 assert(link
->ifname
);
4005 if (link
->state
== LINK_STATE_LINGER
) {
4006 log_link_info(link
, "Link re-added");
4007 link_set_state(link
, LINK_STATE_CONFIGURING
);
4009 r
= link_new_carrier_maps(link
);
4014 r
= sd_netlink_message_read_string(m
, IFLA_IFNAME
, &ifname
);
4015 if (r
>= 0 && !streq(ifname
, link
->ifname
)) {
4016 Manager
*manager
= link
->manager
;
4018 log_link_info(link
, "Interface name change detected, %s has been renamed to %s.", link
->ifname
, ifname
);
4021 r
= link_add(manager
, m
, &link
);
4026 r
= sd_netlink_message_read_strv(m
, IFLA_PROP_LIST
, IFLA_ALT_IFNAME
, &s
);
4028 strv_free_and_replace(link
->alternative_names
, s
);
4030 r
= sd_netlink_message_read_u32(m
, IFLA_MTU
, &mtu
);
4031 if (r
>= 0 && mtu
> 0) {
4033 if (link
->original_mtu
== 0) {
4034 link
->original_mtu
= mtu
;
4035 log_link_debug(link
, "Saved original MTU: %" PRIu32
, link
->original_mtu
);
4038 if (link
->dhcp_client
) {
4039 r
= sd_dhcp_client_set_mtu(link
->dhcp_client
,
4042 return log_link_warning_errno(link
, r
, "Could not update MTU in DHCP client: %m");
4046 r
= sd_radv_set_mtu(link
->radv
, link
->mtu
);
4048 return log_link_warning_errno(link
, r
, "Could not set MTU for Router Advertisement: %m");
4052 /* The kernel may broadcast NEWLINK messages without the MAC address
4053 set, simply ignore them. */
4054 r
= sd_netlink_message_read_ether_addr(m
, IFLA_ADDRESS
, &mac
);
4055 if (r
>= 0 && memcmp(link
->mac
.ether_addr_octet
, mac
.ether_addr_octet
, ETH_ALEN
) != 0) {
4057 memcpy(link
->mac
.ether_addr_octet
, mac
.ether_addr_octet
, ETH_ALEN
);
4059 log_link_debug(link
, "Gained new MAC address: "
4060 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
4061 mac
.ether_addr_octet
[0],
4062 mac
.ether_addr_octet
[1],
4063 mac
.ether_addr_octet
[2],
4064 mac
.ether_addr_octet
[3],
4065 mac
.ether_addr_octet
[4],
4066 mac
.ether_addr_octet
[5]);
4069 bool restart
= sd_ipv4ll_is_running(link
->ipv4ll
) > 0;
4072 r
= sd_ipv4ll_stop(link
->ipv4ll
);
4074 return log_link_warning_errno(link
, r
, "Could not stop IPv4LL client: %m");
4077 r
= sd_ipv4ll_set_mac(link
->ipv4ll
, &link
->mac
);
4079 return log_link_warning_errno(link
, r
, "Could not update MAC address in IPv4LL client: %m");
4082 r
= sd_ipv4ll_start(link
->ipv4ll
);
4084 return log_link_warning_errno(link
, r
, "Could not restart IPv4LL client: %m");
4088 if (link
->dhcp_client
) {
4089 r
= sd_dhcp_client_set_mac(link
->dhcp_client
,
4090 (const uint8_t *) &link
->mac
,
4094 return log_link_warning_errno(link
, r
, "Could not update MAC address in DHCP client: %m");
4096 r
= dhcp4_set_client_identifier(link
);
4098 return log_link_warning_errno(link
, r
, "Could not set DHCP client identifier: %m");
4101 if (link
->dhcp6_client
) {
4102 const DUID
* duid
= link_get_duid(link
);
4103 bool restart
= sd_dhcp6_client_is_running(link
->dhcp6_client
) > 0;
4106 r
= sd_dhcp6_client_stop(link
->dhcp6_client
);
4108 return log_link_warning_errno(link
, r
, "Could not stop DHCPv6 client: %m");
4111 r
= sd_dhcp6_client_set_mac(link
->dhcp6_client
,
4112 (const uint8_t *) &link
->mac
,
4116 return log_link_warning_errno(link
, r
, "Could not update MAC address in DHCPv6 client: %m");
4118 if (link
->network
->iaid_set
) {
4119 r
= sd_dhcp6_client_set_iaid(link
->dhcp6_client
, link
->network
->iaid
);
4121 return log_link_warning_errno(link
, r
, "Could not update DHCPv6 IAID: %m");
4124 r
= sd_dhcp6_client_set_duid(link
->dhcp6_client
,
4126 duid
->raw_data_len
> 0 ? duid
->raw_data
: NULL
,
4127 duid
->raw_data_len
);
4129 return log_link_warning_errno(link
, r
, "Could not update DHCPv6 DUID: %m");
4132 r
= sd_dhcp6_client_start(link
->dhcp6_client
);
4134 return log_link_warning_errno(link
, r
, "Could not restart DHCPv6 client: %m");
4139 bool restart
= sd_radv_is_running(link
->radv
);
4142 r
= sd_radv_stop(link
->radv
);
4144 return log_link_warning_errno(link
, r
, "Could not stop Router Advertisement: %m");
4147 r
= sd_radv_set_mac(link
->radv
, &link
->mac
);
4149 return log_link_warning_errno(link
, r
, "Could not update MAC for Router Advertisement: %m");
4152 r
= sd_radv_start(link
->radv
);
4154 return log_link_warning_errno(link
, r
, "Could not restart Router Advertisement: %m");
4159 r
= sd_ndisc_set_mac(link
->ndisc
, &link
->mac
);
4161 return log_link_warning_errno(link
, r
, "Could not update MAC for NDisc: %m");
4165 old_master
= link
->master_ifindex
;
4166 (void) sd_netlink_message_read_u32(m
, IFLA_MASTER
, (uint32_t *) &link
->master_ifindex
);
4168 link_was_admin_up
= link
->flags
& IFF_UP
;
4169 had_carrier
= link_has_carrier(link
);
4171 r
= link_update_flags(link
, m
, old_master
!= link
->master_ifindex
);
4175 if (!link_was_admin_up
&& (link
->flags
& IFF_UP
)) {
4176 log_link_info(link
, "Link UP");
4178 r
= link_admin_state_up(link
);
4181 } else if (link_was_admin_up
&& !(link
->flags
& IFF_UP
))
4182 log_link_info(link
, "Link DOWN");
4184 r
= link_update_lldp(link
);
4188 carrier_gained
= !had_carrier
&& link_has_carrier(link
);
4189 carrier_lost
= had_carrier
&& !link_has_carrier(link
);
4191 if (carrier_gained
) {
4192 log_link_info(link
, "Gained carrier");
4194 r
= link_carrier_gained(link
);
4197 } else if (carrier_lost
) {
4198 log_link_info(link
, "Lost carrier");
4200 r
= link_carrier_lost(link
);
4208 static void print_link_hashmap(FILE *f
, const char *prefix
, Hashmap
* h
) {
4215 if (hashmap_isempty(h
))
4219 HASHMAP_FOREACH(link
, h
) {
4223 fprintf(f
, "%i", link
->ifindex
);
4230 static void link_save_dns(Link
*link
, FILE *f
, struct in_addr_full
**dns
, unsigned n_dns
, bool *space
) {
4231 for (unsigned j
= 0; j
< n_dns
; j
++) {
4234 if (dns
[j
]->ifindex
!= 0 && dns
[j
]->ifindex
!= link
->ifindex
)
4237 str
= in_addr_full_to_string(dns
[j
]);
4248 static void serialize_addresses(
4253 sd_dhcp_lease
*lease
,
4255 sd_dhcp_lease_server_type what
,
4256 sd_dhcp6_lease
*lease6
,
4258 int (*lease6_get_addr
)(sd_dhcp6_lease
*, const struct in6_addr
**),
4259 int (*lease6_get_fqdn
)(sd_dhcp6_lease
*, char ***)) {
4262 bool _space
= false;
4267 fprintf(f
, "%s=", lvalue
);
4268 fputstrv(f
, addresses
, NULL
, space
);
4270 if (lease
&& conditional
) {
4271 const struct in_addr
*lease_addresses
;
4273 r
= sd_dhcp_lease_get_servers(lease
, what
, &lease_addresses
);
4275 serialize_in_addrs(f
, lease_addresses
, r
, space
, in4_addr_is_non_local
);
4278 if (lease6
&& conditional6
&& lease6_get_addr
) {
4279 const struct in6_addr
*in6_addrs
;
4281 r
= lease6_get_addr(lease6
, &in6_addrs
);
4283 serialize_in6_addrs(f
, in6_addrs
, r
, space
);
4286 if (lease6
&& conditional6
&& lease6_get_fqdn
) {
4289 r
= lease6_get_fqdn(lease6
, &in6_hosts
);
4291 fputstrv(f
, in6_hosts
, NULL
, space
);
4298 int link_save(Link
*link
) {
4299 const char *admin_state
, *oper_state
, *carrier_state
, *address_state
;
4300 _cleanup_free_
char *temp_path
= NULL
;
4301 _cleanup_fclose_
FILE *f
= NULL
;
4307 assert(link
->state_file
);
4308 assert(link
->lease_file
);
4309 assert(link
->manager
);
4311 if (link
->state
== LINK_STATE_LINGER
) {
4312 (void) unlink(link
->state_file
);
4316 link_lldp_save(link
);
4318 admin_state
= link_state_to_string(link
->state
);
4319 assert(admin_state
);
4321 oper_state
= link_operstate_to_string(link
->operstate
);
4324 carrier_state
= link_carrier_state_to_string(link
->carrier_state
);
4325 assert(carrier_state
);
4327 address_state
= link_address_state_to_string(link
->address_state
);
4328 assert(address_state
);
4330 r
= fopen_temporary(link
->state_file
, &f
, &temp_path
);
4334 (void) fchmod(fileno(f
), 0644);
4337 "# This is private data. Do not parse.\n"
4340 "CARRIER_STATE=%s\n"
4341 "ADDRESS_STATE=%s\n",
4342 admin_state
, oper_state
, carrier_state
, address_state
);
4344 if (link
->network
) {
4345 char **dhcp6_domains
= NULL
, **dhcp_domains
= NULL
;
4346 const char *dhcp_domainname
= NULL
, *p
;
4349 fprintf(f
, "REQUIRED_FOR_ONLINE=%s\n",
4350 yes_no(link
->network
->required_for_online
));
4352 LinkOperationalStateRange st
= link
->network
->required_operstate_for_online
;
4353 fprintf(f
, "REQUIRED_OPER_STATE_FOR_ONLINE=%s%s%s\n",
4354 strempty(link_operstate_to_string(st
.min
)),
4355 st
.max
!= LINK_OPERSTATE_RANGE_DEFAULT
.max
? ":" : "",
4356 st
.max
!= LINK_OPERSTATE_RANGE_DEFAULT
.max
? strempty(link_operstate_to_string(st
.max
)) : "");
4358 fprintf(f
, "NETWORK_FILE=%s\n", link
->network
->filename
);
4360 /************************************************************/
4364 if (link
->n_dns
!= (unsigned) -1)
4365 link_save_dns(link
, f
, link
->dns
, link
->n_dns
, &space
);
4367 link_save_dns(link
, f
, link
->network
->dns
, link
->network
->n_dns
, &space
);
4369 serialize_addresses(f
, NULL
, &space
,
4372 link
->network
->dhcp_use_dns
,
4375 link
->network
->dhcp6_use_dns
,
4376 sd_dhcp6_lease_get_dns
,
4379 /* Make sure to flush out old entries before we use the NDisc data */
4382 if (link
->network
->ipv6_accept_ra_use_dns
&& link
->ndisc_rdnss
) {
4385 SET_FOREACH(dd
, link
->ndisc_rdnss
)
4386 serialize_in6_addrs(f
, &dd
->address
, 1, &space
);
4391 /************************************************************/
4393 serialize_addresses(f
, "NTP", NULL
,
4394 link
->ntp
?: link
->network
->ntp
,
4396 link
->network
->dhcp_use_ntp
,
4399 link
->network
->dhcp6_use_ntp
,
4400 sd_dhcp6_lease_get_ntp_addrs
,
4401 sd_dhcp6_lease_get_ntp_fqdn
);
4403 serialize_addresses(f
, "SIP", NULL
,
4406 link
->network
->dhcp_use_sip
,
4408 NULL
, false, NULL
, NULL
);
4410 /************************************************************/
4412 if (link
->network
->dhcp_use_domains
!= DHCP_USE_DOMAINS_NO
) {
4413 if (link
->dhcp_lease
) {
4414 (void) sd_dhcp_lease_get_domainname(link
->dhcp_lease
, &dhcp_domainname
);
4415 (void) sd_dhcp_lease_get_search_domains(link
->dhcp_lease
, &dhcp_domains
);
4417 if (link
->dhcp6_lease
)
4418 (void) sd_dhcp6_lease_get_domains(link
->dhcp6_lease
, &dhcp6_domains
);
4421 fputs("DOMAINS=", f
);
4423 ORDERED_SET_FOREACH(p
, link
->search_domains
?: link
->network
->search_domains
)
4424 fputs_with_space(f
, p
, NULL
, &space
);
4426 if (link
->network
->dhcp_use_domains
== DHCP_USE_DOMAINS_YES
) {
4427 if (dhcp_domainname
)
4428 fputs_with_space(f
, dhcp_domainname
, NULL
, &space
);
4430 fputstrv(f
, dhcp_domains
, NULL
, &space
);
4432 fputstrv(f
, dhcp6_domains
, NULL
, &space
);
4435 if (link
->network
->ipv6_accept_ra_use_domains
== DHCP_USE_DOMAINS_YES
) {
4438 SET_FOREACH(dd
, link
->ndisc_dnssl
)
4439 fputs_with_space(f
, NDISC_DNSSL_DOMAIN(dd
), NULL
, &space
);
4444 /************************************************************/
4446 fputs("ROUTE_DOMAINS=", f
);
4448 ORDERED_SET_FOREACH(p
, link
->route_domains
?: link
->network
->route_domains
)
4449 fputs_with_space(f
, p
, NULL
, &space
);
4451 if (link
->network
->dhcp_use_domains
== DHCP_USE_DOMAINS_ROUTE
) {
4452 if (dhcp_domainname
)
4453 fputs_with_space(f
, dhcp_domainname
, NULL
, &space
);
4455 fputstrv(f
, dhcp_domains
, NULL
, &space
);
4457 fputstrv(f
, dhcp6_domains
, NULL
, &space
);
4460 if (link
->network
->ipv6_accept_ra_use_domains
== DHCP_USE_DOMAINS_ROUTE
) {
4463 SET_FOREACH(dd
, link
->ndisc_dnssl
)
4464 fputs_with_space(f
, NDISC_DNSSL_DOMAIN(dd
), NULL
, &space
);
4469 /************************************************************/
4471 fprintf(f
, "LLMNR=%s\n",
4472 resolve_support_to_string(link
->llmnr
>= 0 ? link
->llmnr
: link
->network
->llmnr
));
4474 /************************************************************/
4476 fprintf(f
, "MDNS=%s\n",
4477 resolve_support_to_string(link
->mdns
>= 0 ? link
->mdns
: link
->network
->mdns
));
4479 /************************************************************/
4481 int dns_default_route
=
4482 link
->dns_default_route
>= 0 ? link
->dns_default_route
:
4483 link
->network
->dns_default_route
;
4484 if (dns_default_route
>= 0)
4485 fprintf(f
, "DNS_DEFAULT_ROUTE=%s\n", yes_no(dns_default_route
));
4487 /************************************************************/
4489 DnsOverTlsMode dns_over_tls_mode
=
4490 link
->dns_over_tls_mode
!= _DNS_OVER_TLS_MODE_INVALID
? link
->dns_over_tls_mode
:
4491 link
->network
->dns_over_tls_mode
;
4492 if (dns_over_tls_mode
!= _DNS_OVER_TLS_MODE_INVALID
)
4493 fprintf(f
, "DNS_OVER_TLS=%s\n", dns_over_tls_mode_to_string(dns_over_tls_mode
));
4495 /************************************************************/
4497 DnssecMode dnssec_mode
=
4498 link
->dnssec_mode
!= _DNSSEC_MODE_INVALID
? link
->dnssec_mode
:
4499 link
->network
->dnssec_mode
;
4500 if (dnssec_mode
!= _DNSSEC_MODE_INVALID
)
4501 fprintf(f
, "DNSSEC=%s\n", dnssec_mode_to_string(dnssec_mode
));
4503 /************************************************************/
4505 Set
*nta_anchors
= link
->dnssec_negative_trust_anchors
;
4506 if (set_isempty(nta_anchors
))
4507 nta_anchors
= link
->network
->dnssec_negative_trust_anchors
;
4509 if (!set_isempty(nta_anchors
)) {
4512 fputs("DNSSEC_NTA=", f
);
4514 SET_FOREACH(n
, nta_anchors
)
4515 fputs_with_space(f
, n
, NULL
, &space
);
4519 /************************************************************/
4521 fputs("ADDRESSES=", f
);
4523 SET_FOREACH(a
, link
->addresses
) {
4524 _cleanup_free_
char *address_str
= NULL
;
4526 r
= in_addr_to_string(a
->family
, &a
->in_addr
, &address_str
);
4530 fprintf(f
, "%s%s/%u", space
? " " : "", address_str
, a
->prefixlen
);
4535 /************************************************************/
4537 fputs("ROUTES=", f
);
4539 SET_FOREACH(route
, link
->routes
) {
4540 _cleanup_free_
char *route_str
= NULL
;
4542 r
= in_addr_to_string(route
->family
, &route
->dst
, &route_str
);
4546 fprintf(f
, "%s%s/%hhu/%hhu/%"PRIu32
"/%"PRIu32
"/"USEC_FMT
,
4547 space
? " " : "", route_str
,
4548 route
->dst_prefixlen
, route
->tos
, route
->priority
, route
->table
, route
->lifetime
);
4555 print_link_hashmap(f
, "CARRIER_BOUND_TO=", link
->bound_to_links
);
4556 print_link_hashmap(f
, "CARRIER_BOUND_BY=", link
->bound_by_links
);
4558 if (link
->dhcp_lease
) {
4559 r
= dhcp_lease_save(link
->dhcp_lease
, link
->lease_file
);
4567 (void) unlink(link
->lease_file
);
4570 struct in_addr address
;
4572 r
= sd_ipv4ll_get_address(link
->ipv4ll
, &address
);
4574 fputs("IPV4LL_ADDRESS=", f
);
4575 serialize_in_addrs(f
, &address
, 1, false, NULL
);
4580 if (link
->dhcp6_client
) {
4581 _cleanup_free_
char *duid
= NULL
;
4584 r
= sd_dhcp6_client_get_iaid(link
->dhcp6_client
, &iaid
);
4586 fprintf(f
, "DHCP6_CLIENT_IAID=0x%x\n", iaid
);
4588 r
= sd_dhcp6_client_duid_as_string(link
->dhcp6_client
, &duid
);
4590 fprintf(f
, "DHCP6_CLIENT_DUID=%s\n", duid
);
4593 r
= fflush_and_check(f
);
4597 if (rename(temp_path
, link
->state_file
) < 0) {
4605 (void) unlink(link
->state_file
);
4607 (void) unlink(temp_path
);
4609 return log_link_error_errno(link
, r
, "Failed to save link data to %s: %m", link
->state_file
);
4612 /* The serialized state in /run is no longer up-to-date. */
4613 void link_dirty(Link
*link
) {
4618 /* mark manager dirty as link is dirty */
4619 manager_dirty(link
->manager
);
4621 r
= set_ensure_put(&link
->manager
->dirty_links
, NULL
, link
);
4623 /* Ignore allocation errors and don't take another ref if the link was already dirty */
4628 /* The serialized state in /run is up-to-date */
4629 void link_clean(Link
*link
) {
4631 assert(link
->manager
);
4633 link_unref(set_remove(link
->manager
->dirty_links
, link
));
4636 int link_save_and_clean(Link
*link
) {
4639 r
= link_save(link
);
4647 static const char* const link_state_table
[_LINK_STATE_MAX
] = {
4648 [LINK_STATE_PENDING
] = "pending",
4649 [LINK_STATE_INITIALIZED
] = "initialized",
4650 [LINK_STATE_CONFIGURING
] = "configuring",
4651 [LINK_STATE_CONFIGURED
] = "configured",
4652 [LINK_STATE_UNMANAGED
] = "unmanaged",
4653 [LINK_STATE_FAILED
] = "failed",
4654 [LINK_STATE_LINGER
] = "linger",
4657 DEFINE_STRING_TABLE_LOOKUP(link_state
, LinkState
);
4659 int log_link_message_full_errno(Link
*link
, sd_netlink_message
*m
, int level
, int err
, const char *msg
) {
4660 const char *err_msg
= NULL
;
4662 (void) sd_netlink_message_read_string(m
, NLMSGERR_ATTR_MSG
, &err_msg
);
4663 return log_link_full_errno(link
, level
, err
,
4667 err_msg
&& !endswith(err_msg
, ".") ? "." : "",
4668 err_msg
? " " : "");