1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 #include <netinet/ether.h>
5 #include <linux/can/netlink.h>
9 #include "alloc-util.h"
11 #include "dhcp-lease-internal.h"
14 #include "netlink-util.h"
15 #include "network-internal.h"
16 #include "networkd-ipv6-proxy-ndp.h"
17 #include "networkd-lldp-tx.h"
18 #include "networkd-manager.h"
19 #include "networkd-ndisc.h"
20 #include "networkd-radv.h"
21 #include "networkd-routing-policy-rule.h"
23 #include "socket-util.h"
24 #include "stdio-util.h"
25 #include "string-table.h"
26 #include "udev-util.h"
30 static bool link_dhcp6_enabled(Link
*link
) {
33 if (!socket_ipv6_is_supported())
36 if (link
->flags
& IFF_LOOPBACK
)
42 return link
->network
->dhcp
& ADDRESS_FAMILY_IPV6
;
45 static bool link_dhcp4_enabled(Link
*link
) {
48 if (link
->flags
& IFF_LOOPBACK
)
54 return link
->network
->dhcp
& ADDRESS_FAMILY_IPV4
;
57 static bool link_dhcp4_server_enabled(Link
*link
) {
60 if (link
->flags
& IFF_LOOPBACK
)
66 return link
->network
->dhcp_server
;
69 static bool link_ipv4ll_enabled(Link
*link
) {
72 if (link
->flags
& IFF_LOOPBACK
)
78 if (streq_ptr(link
->kind
, "wireguard"))
81 return link
->network
->link_local
& ADDRESS_FAMILY_IPV4
;
84 static bool link_ipv6ll_enabled(Link
*link
) {
87 if (!socket_ipv6_is_supported())
90 if (link
->flags
& IFF_LOOPBACK
)
96 if (streq_ptr(link
->kind
, "wireguard"))
99 return link
->network
->link_local
& ADDRESS_FAMILY_IPV6
;
102 static bool link_ipv6_enabled(Link
*link
) {
105 if (!socket_ipv6_is_supported())
108 if (link
->network
->bridge
)
111 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
112 return link_ipv6ll_enabled(link
) || network_has_static_ipv6_addresses(link
->network
);
115 static bool link_radv_enabled(Link
*link
) {
118 if (!link_ipv6ll_enabled(link
))
121 return link
->network
->router_prefix_delegation
!= RADV_PREFIX_DELEGATION_NONE
;
124 static bool link_lldp_rx_enabled(Link
*link
) {
127 if (link
->flags
& IFF_LOOPBACK
)
130 if (link
->iftype
!= ARPHRD_ETHER
)
136 /* LLDP should be handled on bridge slaves as those have a direct
137 * connection to their peers not on the bridge master. Linux doesn't
138 * even (by default) forward lldp packets to the bridge master.*/
139 if (streq_ptr("bridge", link
->kind
))
142 return link
->network
->lldp_mode
!= LLDP_MODE_NO
;
145 static bool link_lldp_emit_enabled(Link
*link
) {
148 if (link
->flags
& IFF_LOOPBACK
)
151 if (link
->iftype
!= ARPHRD_ETHER
)
157 return link
->network
->lldp_emit
!= LLDP_EMIT_NO
;
160 static bool link_ipv4_forward_enabled(Link
*link
) {
163 if (link
->flags
& IFF_LOOPBACK
)
169 if (link
->network
->ip_forward
== _ADDRESS_FAMILY_BOOLEAN_INVALID
)
172 return link
->network
->ip_forward
& ADDRESS_FAMILY_IPV4
;
175 static bool link_ipv6_forward_enabled(Link
*link
) {
178 if (!socket_ipv6_is_supported())
181 if (link
->flags
& IFF_LOOPBACK
)
187 if (link
->network
->ip_forward
== _ADDRESS_FAMILY_BOOLEAN_INVALID
)
190 return link
->network
->ip_forward
& ADDRESS_FAMILY_IPV6
;
193 static bool link_proxy_arp_enabled(Link
*link
) {
196 if (link
->flags
& IFF_LOOPBACK
)
202 if (link
->network
->proxy_arp
< 0)
208 static bool link_ipv6_accept_ra_enabled(Link
*link
) {
211 if (!socket_ipv6_is_supported())
214 if (link
->flags
& IFF_LOOPBACK
)
220 if (!link_ipv6ll_enabled(link
))
223 /* If unset use system default (enabled if local forwarding is disabled.
224 * disabled if local forwarding is enabled).
225 * If set, ignore or enforce RA independent of local forwarding state.
227 if (link
->network
->ipv6_accept_ra
< 0)
228 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
229 return !link_ipv6_forward_enabled(link
);
230 else if (link
->network
->ipv6_accept_ra
> 0)
231 /* accept RA even if ip_forward is enabled */
238 static IPv6PrivacyExtensions
link_ipv6_privacy_extensions(Link
*link
) {
241 if (!socket_ipv6_is_supported())
242 return _IPV6_PRIVACY_EXTENSIONS_INVALID
;
244 if (link
->flags
& IFF_LOOPBACK
)
245 return _IPV6_PRIVACY_EXTENSIONS_INVALID
;
248 return _IPV6_PRIVACY_EXTENSIONS_INVALID
;
250 return link
->network
->ipv6_privacy_extensions
;
253 static int link_enable_ipv6(Link
*link
) {
254 const char *p
= NULL
;
258 if (link
->flags
& IFF_LOOPBACK
)
261 disabled
= !link_ipv6_enabled(link
);
263 p
= strjoina("/proc/sys/net/ipv6/conf/", link
->ifname
, "/disable_ipv6");
265 r
= write_string_file(p
, one_zero(disabled
), WRITE_STRING_FILE_VERIFY_ON_FAILURE
);
267 log_link_warning_errno(link
, r
, "Cannot %s IPv6 for interface %s: %m",
268 enable_disable(!disabled
), link
->ifname
);
270 log_link_info(link
, "IPv6 successfully %sd", enable_disable(!disabled
));
275 void link_update_operstate(Link
*link
) {
276 LinkOperationalState operstate
;
279 if (link
->kernel_operstate
== IF_OPER_DORMANT
)
280 operstate
= LINK_OPERSTATE_DORMANT
;
281 else if (link_has_carrier(link
)) {
283 uint8_t scope
= RT_SCOPE_NOWHERE
;
286 /* if we have carrier, check what addresses we have */
287 SET_FOREACH(address
, link
->addresses
, i
) {
288 if (!address_is_ready(address
))
291 if (address
->scope
< scope
)
292 scope
= address
->scope
;
295 /* for operstate we also take foreign addresses into account */
296 SET_FOREACH(address
, link
->addresses_foreign
, i
) {
297 if (!address_is_ready(address
))
300 if (address
->scope
< scope
)
301 scope
= address
->scope
;
304 if (scope
< RT_SCOPE_SITE
)
305 /* universally accessible addresses found */
306 operstate
= LINK_OPERSTATE_ROUTABLE
;
307 else if (scope
< RT_SCOPE_HOST
)
308 /* only link or site local addresses found */
309 operstate
= LINK_OPERSTATE_DEGRADED
;
311 /* no useful addresses found */
312 operstate
= LINK_OPERSTATE_CARRIER
;
313 } else if (link
->flags
& IFF_UP
)
314 operstate
= LINK_OPERSTATE_NO_CARRIER
;
316 operstate
= LINK_OPERSTATE_OFF
;
318 if (link
->operstate
!= operstate
) {
319 link
->operstate
= operstate
;
320 link_send_changed(link
, "OperationalState", NULL
);
325 #define FLAG_STRING(string, flag, old, new) \
326 (((old ^ new) & flag) \
327 ? ((old & flag) ? (" -" string) : (" +" string)) \
330 static int link_update_flags(Link
*link
, sd_netlink_message
*m
) {
331 unsigned flags
, unknown_flags_added
, unknown_flags_removed
, unknown_flags
;
337 r
= sd_rtnl_message_link_get_flags(m
, &flags
);
339 return log_link_warning_errno(link
, r
, "Could not get link flags: %m");
341 r
= sd_netlink_message_read_u8(m
, IFLA_OPERSTATE
, &operstate
);
343 /* if we got a message without operstate, take it to mean
344 the state was unchanged */
345 operstate
= link
->kernel_operstate
;
347 if ((link
->flags
== flags
) && (link
->kernel_operstate
== operstate
))
350 if (link
->flags
!= flags
) {
351 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",
352 FLAG_STRING("LOOPBACK", IFF_LOOPBACK
, link
->flags
, flags
),
353 FLAG_STRING("MASTER", IFF_MASTER
, link
->flags
, flags
),
354 FLAG_STRING("SLAVE", IFF_SLAVE
, link
->flags
, flags
),
355 FLAG_STRING("UP", IFF_UP
, link
->flags
, flags
),
356 FLAG_STRING("DORMANT", IFF_DORMANT
, link
->flags
, flags
),
357 FLAG_STRING("LOWER_UP", IFF_LOWER_UP
, link
->flags
, flags
),
358 FLAG_STRING("RUNNING", IFF_RUNNING
, link
->flags
, flags
),
359 FLAG_STRING("MULTICAST", IFF_MULTICAST
, link
->flags
, flags
),
360 FLAG_STRING("BROADCAST", IFF_BROADCAST
, link
->flags
, flags
),
361 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT
, link
->flags
, flags
),
362 FLAG_STRING("PROMISC", IFF_PROMISC
, link
->flags
, flags
),
363 FLAG_STRING("ALLMULTI", IFF_ALLMULTI
, link
->flags
, flags
),
364 FLAG_STRING("PORTSEL", IFF_PORTSEL
, link
->flags
, flags
),
365 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA
, link
->flags
, flags
),
366 FLAG_STRING("DYNAMIC", IFF_DYNAMIC
, link
->flags
, flags
),
367 FLAG_STRING("NOARP", IFF_NOARP
, link
->flags
, flags
),
368 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS
, link
->flags
, flags
),
369 FLAG_STRING("DEBUG", IFF_DEBUG
, link
->flags
, flags
),
370 FLAG_STRING("ECHO", IFF_ECHO
, link
->flags
, flags
));
372 unknown_flags
= ~(IFF_LOOPBACK
| IFF_MASTER
| IFF_SLAVE
| IFF_UP
|
373 IFF_DORMANT
| IFF_LOWER_UP
| IFF_RUNNING
|
374 IFF_MULTICAST
| IFF_BROADCAST
| IFF_POINTOPOINT
|
375 IFF_PROMISC
| IFF_ALLMULTI
| IFF_PORTSEL
|
376 IFF_AUTOMEDIA
| IFF_DYNAMIC
| IFF_NOARP
|
377 IFF_NOTRAILERS
| IFF_DEBUG
| IFF_ECHO
);
378 unknown_flags_added
= ((link
->flags
^ flags
) & flags
& unknown_flags
);
379 unknown_flags_removed
= ((link
->flags
^ flags
) & link
->flags
& unknown_flags
);
381 /* link flags are currently at most 18 bits, let's align to
383 if (unknown_flags_added
)
385 "Unknown link flags gained: %#.5x (ignoring)",
386 unknown_flags_added
);
388 if (unknown_flags_removed
)
390 "Unknown link flags lost: %#.5x (ignoring)",
391 unknown_flags_removed
);
395 link
->kernel_operstate
= operstate
;
397 link_update_operstate(link
);
402 static int link_new(Manager
*manager
, sd_netlink_message
*message
, Link
**ret
) {
403 _cleanup_(link_unrefp
) Link
*link
= NULL
;
405 const char *ifname
, *kind
= NULL
;
407 unsigned short iftype
;
413 /* check for link kind */
414 r
= sd_netlink_message_enter_container(message
, IFLA_LINKINFO
);
416 (void) sd_netlink_message_read_string(message
, IFLA_INFO_KIND
, &kind
);
417 r
= sd_netlink_message_exit_container(message
);
422 r
= sd_netlink_message_get_type(message
, &type
);
425 else if (type
!= RTM_NEWLINK
)
428 r
= sd_rtnl_message_link_get_ifindex(message
, &ifindex
);
431 else if (ifindex
<= 0)
434 r
= sd_rtnl_message_link_get_type(message
, &iftype
);
438 r
= sd_netlink_message_read_string(message
, IFLA_IFNAME
, &ifname
);
442 link
= new0(Link
, 1);
447 link
->manager
= manager
;
448 link
->state
= LINK_STATE_PENDING
;
449 link
->rtnl_extended_attrs
= true;
450 link
->ifindex
= ifindex
;
451 link
->iftype
= iftype
;
452 link
->ifname
= strdup(ifname
);
457 link
->kind
= strdup(kind
);
462 r
= sd_netlink_message_read_ether_addr(message
, IFLA_ADDRESS
, &link
->mac
);
464 log_link_debug_errno(link
, r
, "MAC address not found for new device, continuing without");
466 if (asprintf(&link
->state_file
, "/run/systemd/netif/links/%d", link
->ifindex
) < 0)
469 if (asprintf(&link
->lease_file
, "/run/systemd/netif/leases/%d", link
->ifindex
) < 0)
472 if (asprintf(&link
->lldp_file
, "/run/systemd/netif/lldp/%d", link
->ifindex
) < 0)
475 r
= hashmap_ensure_allocated(&manager
->links
, NULL
);
479 r
= hashmap_put(manager
->links
, INT_TO_PTR(link
->ifindex
), link
);
483 r
= link_update_flags(link
, message
);
487 *ret
= TAKE_PTR(link
);
492 static void link_free(Link
*link
) {
501 while ((route
= set_first(link
->routes
)))
504 while ((route
= set_first(link
->routes_foreign
)))
507 link
->routes
= set_free(link
->routes
);
508 link
->routes_foreign
= set_free(link
->routes_foreign
);
510 while ((address
= set_first(link
->addresses
)))
511 address_free(address
);
513 while ((address
= set_first(link
->addresses_foreign
)))
514 address_free(address
);
516 link
->addresses
= set_free(link
->addresses
);
517 link
->addresses_foreign
= set_free(link
->addresses_foreign
);
519 while ((address
= link
->pool_addresses
)) {
520 LIST_REMOVE(addresses
, link
->pool_addresses
, address
);
521 address_free(address
);
524 sd_dhcp_server_unref(link
->dhcp_server
);
525 sd_dhcp_client_unref(link
->dhcp_client
);
526 sd_dhcp_lease_unref(link
->dhcp_lease
);
528 link_lldp_emit_stop(link
);
530 free(link
->lease_file
);
532 sd_lldp_unref(link
->lldp
);
533 free(link
->lldp_file
);
537 sd_ipv4ll_unref(link
->ipv4ll
);
538 sd_dhcp6_client_unref(link
->dhcp6_client
);
539 sd_ndisc_unref(link
->ndisc
);
540 sd_radv_unref(link
->radv
);
543 hashmap_remove(link
->manager
->links
, INT_TO_PTR(link
->ifindex
));
549 (void) unlink(link
->state_file
);
550 free(link
->state_file
);
552 udev_device_unref(link
->udev_device
);
554 HASHMAP_FOREACH (carrier
, link
->bound_to_links
, i
)
555 hashmap_remove(link
->bound_to_links
, INT_TO_PTR(carrier
->ifindex
));
556 hashmap_free(link
->bound_to_links
);
558 HASHMAP_FOREACH (carrier
, link
->bound_by_links
, i
)
559 hashmap_remove(link
->bound_by_links
, INT_TO_PTR(carrier
->ifindex
));
560 hashmap_free(link
->bound_by_links
);
565 Link
*link_unref(Link
*link
) {
569 assert(link
->n_ref
> 0);
581 Link
*link_ref(Link
*link
) {
585 assert(link
->n_ref
> 0);
592 int link_get(Manager
*m
, int ifindex
, Link
**ret
) {
599 link
= hashmap_get(m
->links
, INT_TO_PTR(ifindex
));
608 static void link_set_state(Link
*link
, LinkState state
) {
611 if (link
->state
== state
)
616 link_send_changed(link
, "AdministrativeState", NULL
);
619 static void link_enter_unmanaged(Link
*link
) {
622 log_link_debug(link
, "Unmanaged");
624 link_set_state(link
, LINK_STATE_UNMANAGED
);
629 static int link_stop_clients(Link
*link
) {
633 assert(link
->manager
);
634 assert(link
->manager
->event
);
636 if (link
->dhcp_client
) {
637 k
= sd_dhcp_client_stop(link
->dhcp_client
);
639 r
= log_link_warning_errno(link
, k
, "Could not stop DHCPv4 client: %m");
643 k
= sd_ipv4ll_stop(link
->ipv4ll
);
645 r
= log_link_warning_errno(link
, k
, "Could not stop IPv4 link-local: %m");
648 if (link
->dhcp6_client
) {
649 k
= sd_dhcp6_client_stop(link
->dhcp6_client
);
651 r
= log_link_warning_errno(link
, k
, "Could not stop DHCPv6 client: %m");
655 k
= sd_ndisc_stop(link
->ndisc
);
657 r
= log_link_warning_errno(link
, k
, "Could not stop IPv6 Router Discovery: %m");
661 k
= sd_radv_stop(link
->radv
);
663 r
= log_link_warning_errno(link
, k
, "Could not stop IPv6 Router Advertisement: %m");
666 link_lldp_emit_stop(link
);
670 void link_enter_failed(Link
*link
) {
673 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
676 log_link_warning(link
, "Failed");
678 link_set_state(link
, LINK_STATE_FAILED
);
680 link_stop_clients(link
);
685 static Address
* link_find_dhcp_server_address(Link
*link
) {
689 assert(link
->network
);
691 /* The first statically configured address if there is any */
692 LIST_FOREACH(addresses
, address
, link
->network
->static_addresses
) {
694 if (address
->family
!= AF_INET
)
697 if (in_addr_is_null(address
->family
, &address
->in_addr
))
703 /* If that didn't work, find a suitable address we got from the pool */
704 LIST_FOREACH(addresses
, address
, link
->pool_addresses
) {
705 if (address
->family
!= AF_INET
)
714 static void link_enter_configured(Link
*link
) {
716 assert(link
->network
);
718 if (link
->state
!= LINK_STATE_SETTING_ROUTES
)
721 log_link_info(link
, "Configured");
723 link_set_state(link
, LINK_STATE_CONFIGURED
);
728 void link_check_ready(Link
*link
) {
734 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
740 if (!link
->static_routes_configured
)
743 if (!link
->routing_policy_rules_configured
)
746 if (link_ipv4ll_enabled(link
))
747 if (!link
->ipv4ll_address
||
751 if (!link
->network
->bridge
) {
753 if (link_ipv6ll_enabled(link
))
754 if (in_addr_is_null(AF_INET6
, (const union in_addr_union
*) &link
->ipv6ll_address
) > 0)
757 if ((link_dhcp4_enabled(link
) && !link_dhcp6_enabled(link
) &&
758 !link
->dhcp4_configured
) ||
759 (link_dhcp6_enabled(link
) && !link_dhcp4_enabled(link
) &&
760 !link
->dhcp6_configured
) ||
761 (link_dhcp4_enabled(link
) && link_dhcp6_enabled(link
) &&
762 !link
->dhcp4_configured
&& !link
->dhcp6_configured
))
765 if (link_ipv6_accept_ra_enabled(link
) && !link
->ndisc_configured
)
769 SET_FOREACH(a
, link
->addresses
, i
)
770 if (!address_is_ready(a
))
773 if (link
->state
!= LINK_STATE_CONFIGURED
)
774 link_enter_configured(link
);
779 static int link_set_routing_policy_rule(Link
*link
) {
780 RoutingPolicyRule
*rule
, *rrule
= NULL
;
784 assert(link
->network
);
786 LIST_FOREACH(rules
, rule
, link
->network
->rules
) {
787 r
= routing_policy_rule_get(link
->manager
, rule
->family
, &rule
->from
, rule
->from_prefixlen
, &rule
->to
,
788 rule
->to_prefixlen
, rule
->tos
, rule
->fwmark
, rule
->table
, rule
->iif
, rule
->oif
, &rrule
);
790 (void) routing_policy_rule_make_local(link
->manager
, rrule
);
794 r
= routing_policy_rule_configure(rule
, link
, link_routing_policy_rule_handler
, false);
796 log_link_warning_errno(link
, r
, "Could not set routing policy rules: %m");
797 link_enter_failed(link
);
801 link
->routing_policy_rule_messages
++;
804 routing_policy_rule_purge(link
->manager
, link
);
805 if (link
->routing_policy_rule_messages
== 0) {
806 link
->routing_policy_rules_configured
= true;
807 link_check_ready(link
);
809 log_link_debug(link
, "Setting routing policy rules");
814 static int route_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
815 _cleanup_(link_unrefp
) Link
*link
= userdata
;
818 assert(link
->route_messages
> 0);
819 assert(IN_SET(link
->state
, LINK_STATE_SETTING_ADDRESSES
,
820 LINK_STATE_SETTING_ROUTES
, LINK_STATE_FAILED
,
823 link
->route_messages
--;
825 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
828 r
= sd_netlink_message_get_errno(m
);
829 if (r
< 0 && r
!= -EEXIST
)
830 log_link_warning_errno(link
, r
, "Could not set route: %m");
832 if (link
->route_messages
== 0) {
833 log_link_debug(link
, "Routes set");
834 link
->static_routes_configured
= true;
835 link_check_ready(link
);
841 static int link_enter_set_routes(Link
*link
) {
846 assert(link
->network
);
847 assert(link
->state
== LINK_STATE_SETTING_ADDRESSES
);
849 (void) link_set_routing_policy_rule(link
);
851 link_set_state(link
, LINK_STATE_SETTING_ROUTES
);
853 LIST_FOREACH(routes
, rt
, link
->network
->static_routes
) {
854 r
= route_configure(rt
, link
, route_handler
);
856 log_link_warning_errno(link
, r
, "Could not set routes: %m");
857 link_enter_failed(link
);
861 link
->route_messages
++;
864 if (link
->route_messages
== 0) {
865 link
->static_routes_configured
= true;
866 link_check_ready(link
);
868 log_link_debug(link
, "Setting routes");
873 int link_route_remove_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
874 _cleanup_(link_unrefp
) Link
*link
= userdata
;
879 assert(link
->ifname
);
881 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
884 r
= sd_netlink_message_get_errno(m
);
885 if (r
< 0 && r
!= -ESRCH
)
886 log_link_warning_errno(link
, r
, "Could not drop route: %m");
891 static int address_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
892 _cleanup_(link_unrefp
) Link
*link
= userdata
;
898 assert(link
->ifname
);
899 assert(link
->address_messages
> 0);
900 assert(IN_SET(link
->state
, LINK_STATE_SETTING_ADDRESSES
,
901 LINK_STATE_FAILED
, LINK_STATE_LINGER
));
903 link
->address_messages
--;
905 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
908 r
= sd_netlink_message_get_errno(m
);
909 if (r
< 0 && r
!= -EEXIST
)
910 log_link_warning_errno(link
, r
, "could not set address: %m");
912 manager_rtnl_process_address(rtnl
, m
, link
->manager
);
914 if (link
->address_messages
== 0) {
915 log_link_debug(link
, "Addresses set");
916 link_enter_set_routes(link
);
922 static int address_label_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
923 _cleanup_(link_unrefp
) Link
*link
= userdata
;
929 assert(link
->ifname
);
930 assert(link
->address_label_messages
> 0);
932 link
->address_label_messages
--;
934 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
937 r
= sd_netlink_message_get_errno(m
);
938 if (r
< 0 && r
!= -EEXIST
)
939 log_link_warning_errno(link
, r
, "could not set address label: %m");
941 manager_rtnl_process_address(rtnl
, m
, link
->manager
);
943 if (link
->address_label_messages
== 0)
944 log_link_debug(link
, "Addresses label set");
949 static int link_push_uplink_dns_to_dhcp_server(Link
*link
, sd_dhcp_server
*s
) {
950 _cleanup_free_
struct in_addr
*addresses
= NULL
;
951 size_t n_addresses
= 0, n_allocated
= 0;
954 log_debug("Copying DNS server information from %s", link
->ifname
);
959 for (i
= 0; i
< link
->network
->n_dns
; i
++) {
962 /* Only look for IPv4 addresses */
963 if (link
->network
->dns
[i
].family
!= AF_INET
)
966 ia
= link
->network
->dns
[i
].address
.in
;
968 /* Never propagate obviously borked data */
969 if (in4_addr_is_null(&ia
) || in4_addr_is_localhost(&ia
))
972 if (!GREEDY_REALLOC(addresses
, n_allocated
, n_addresses
+ 1))
975 addresses
[n_addresses
++] = ia
;
978 if (link
->network
->dhcp_use_dns
&& link
->dhcp_lease
) {
979 const struct in_addr
*da
= NULL
;
982 n
= sd_dhcp_lease_get_dns(link
->dhcp_lease
, &da
);
985 if (!GREEDY_REALLOC(addresses
, n_allocated
, n_addresses
+ n
))
988 memcpy(addresses
+ n_addresses
, da
, n
* sizeof(struct in_addr
));
993 if (n_addresses
<= 0)
996 return sd_dhcp_server_set_dns(s
, addresses
, n_addresses
);
999 static int link_push_uplink_ntp_to_dhcp_server(Link
*link
, sd_dhcp_server
*s
) {
1000 _cleanup_free_
struct in_addr
*addresses
= NULL
;
1001 size_t n_addresses
= 0, n_allocated
= 0;
1007 log_debug("Copying NTP server information from %s", link
->ifname
);
1009 STRV_FOREACH(a
, link
->network
->ntp
) {
1012 /* Only look for IPv4 addresses */
1013 if (inet_pton(AF_INET
, *a
, &ia
) <= 0)
1016 /* Never propagate obviously borked data */
1017 if (in4_addr_is_null(&ia
) || in4_addr_is_localhost(&ia
))
1020 if (!GREEDY_REALLOC(addresses
, n_allocated
, n_addresses
+ 1))
1023 addresses
[n_addresses
++] = ia
;
1026 if (link
->network
->dhcp_use_ntp
&& link
->dhcp_lease
) {
1027 const struct in_addr
*da
= NULL
;
1030 n
= sd_dhcp_lease_get_ntp(link
->dhcp_lease
, &da
);
1033 if (!GREEDY_REALLOC(addresses
, n_allocated
, n_addresses
+ n
))
1036 memcpy(addresses
+ n_addresses
, da
, n
* sizeof(struct in_addr
));
1041 if (n_addresses
<= 0)
1044 return sd_dhcp_server_set_ntp(s
, addresses
, n_addresses
);
1047 static int link_set_bridge_fdb(Link
*link
) {
1048 FdbEntry
*fdb_entry
;
1051 LIST_FOREACH(static_fdb_entries
, fdb_entry
, link
->network
->static_fdb_entries
) {
1052 r
= fdb_entry_configure(link
, fdb_entry
);
1054 return log_link_error_errno(link
, r
, "Failed to add MAC entry to static MAC table: %m");
1060 static int link_enter_set_addresses(Link
*link
) {
1061 AddressLabel
*label
;
1066 assert(link
->network
);
1067 assert(link
->state
!= _LINK_STATE_INVALID
);
1069 r
= link_set_bridge_fdb(link
);
1073 link_set_state(link
, LINK_STATE_SETTING_ADDRESSES
);
1075 LIST_FOREACH(addresses
, ad
, link
->network
->static_addresses
) {
1076 r
= address_configure(ad
, link
, address_handler
, false);
1078 log_link_warning_errno(link
, r
, "Could not set addresses: %m");
1079 link_enter_failed(link
);
1083 link
->address_messages
++;
1086 LIST_FOREACH(labels
, label
, link
->network
->address_labels
) {
1087 r
= address_label_configure(label
, link
, address_label_handler
, false);
1089 log_link_warning_errno(link
, r
, "Could not set address label: %m");
1090 link_enter_failed(link
);
1094 link
->address_label_messages
++;
1097 /* now that we can figure out a default address for the dhcp server,
1099 if (link_dhcp4_server_enabled(link
)) {
1101 Link
*uplink
= NULL
;
1102 bool acquired_uplink
= false;
1104 address
= link_find_dhcp_server_address(link
);
1106 log_link_warning(link
, "Failed to find suitable address for DHCPv4 server instance.");
1107 link_enter_failed(link
);
1111 /* use the server address' subnet as the pool */
1112 r
= sd_dhcp_server_configure_pool(link
->dhcp_server
, &address
->in_addr
.in
, address
->prefixlen
,
1113 link
->network
->dhcp_server_pool_offset
, link
->network
->dhcp_server_pool_size
);
1118 r = sd_dhcp_server_set_router(link->dhcp_server,
1119 &main_address->in_addr.in);
1124 if (link
->network
->dhcp_server_max_lease_time_usec
> 0) {
1125 r
= sd_dhcp_server_set_max_lease_time(
1127 DIV_ROUND_UP(link
->network
->dhcp_server_max_lease_time_usec
, USEC_PER_SEC
));
1132 if (link
->network
->dhcp_server_default_lease_time_usec
> 0) {
1133 r
= sd_dhcp_server_set_default_lease_time(
1135 DIV_ROUND_UP(link
->network
->dhcp_server_default_lease_time_usec
, USEC_PER_SEC
));
1140 if (link
->network
->dhcp_server_emit_dns
) {
1142 if (link
->network
->n_dhcp_server_dns
> 0)
1143 r
= sd_dhcp_server_set_dns(link
->dhcp_server
, link
->network
->dhcp_server_dns
, link
->network
->n_dhcp_server_dns
);
1145 uplink
= manager_find_uplink(link
->manager
, link
);
1146 acquired_uplink
= true;
1149 log_link_debug(link
, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1152 r
= link_push_uplink_dns_to_dhcp_server(uplink
, link
->dhcp_server
);
1155 log_link_warning_errno(link
, r
, "Failed to set DNS server for DHCP server, ignoring: %m");
1158 if (link
->network
->dhcp_server_emit_ntp
) {
1160 if (link
->network
->n_dhcp_server_ntp
> 0)
1161 r
= sd_dhcp_server_set_ntp(link
->dhcp_server
, link
->network
->dhcp_server_ntp
, link
->network
->n_dhcp_server_ntp
);
1163 if (!acquired_uplink
)
1164 uplink
= manager_find_uplink(link
->manager
, link
);
1167 log_link_debug(link
, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1170 r
= link_push_uplink_ntp_to_dhcp_server(uplink
, link
->dhcp_server
);
1174 log_link_warning_errno(link
, r
, "Failed to set NTP server for DHCP server, ignoring: %m");
1177 r
= sd_dhcp_server_set_emit_router(link
->dhcp_server
, link
->network
->dhcp_server_emit_router
);
1179 log_link_warning_errno(link
, r
, "Failed to set router emission for DHCP server: %m");
1183 if (link
->network
->dhcp_server_emit_timezone
) {
1184 _cleanup_free_
char *buffer
= NULL
;
1185 const char *tz
= NULL
;
1187 if (link
->network
->dhcp_server_timezone
)
1188 tz
= link
->network
->dhcp_server_timezone
;
1190 r
= get_timezone(&buffer
);
1192 log_warning_errno(r
, "Failed to determine timezone: %m");
1198 r
= sd_dhcp_server_set_timezone(link
->dhcp_server
, tz
);
1204 r
= sd_dhcp_server_start(link
->dhcp_server
);
1206 log_link_warning_errno(link
, r
, "Could not start DHCPv4 server instance: %m");
1208 link_enter_failed(link
);
1213 log_link_debug(link
, "Offering DHCPv4 leases");
1216 if (link
->address_messages
== 0)
1217 link_enter_set_routes(link
);
1219 log_link_debug(link
, "Setting addresses");
1224 int link_address_remove_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
1225 _cleanup_(link_unrefp
) Link
*link
= userdata
;
1230 assert(link
->ifname
);
1232 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1235 r
= sd_netlink_message_get_errno(m
);
1236 if (r
< 0 && r
!= -EADDRNOTAVAIL
)
1237 log_link_warning_errno(link
, r
, "Could not drop address: %m");
1242 static int link_set_bridge_vlan(Link
*link
) {
1245 r
= br_vlan_configure(link
, link
->network
->pvid
, link
->network
->br_vid_bitmap
, link
->network
->br_untagged_bitmap
);
1247 log_link_error_errno(link
, r
, "Failed to assign VLANs to bridge port: %m");
1252 static int link_set_proxy_arp(Link
*link
) {
1253 const char *p
= NULL
;
1256 if (!link_proxy_arp_enabled(link
))
1259 p
= strjoina("/proc/sys/net/ipv4/conf/", link
->ifname
, "/proxy_arp");
1261 r
= write_string_file(p
, one_zero(link
->network
->proxy_arp
), WRITE_STRING_FILE_VERIFY_ON_FAILURE
);
1263 log_link_warning_errno(link
, r
, "Cannot configure proxy ARP for interface: %m");
1268 static int link_set_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
1269 _cleanup_(link_unrefp
) Link
*link
= userdata
;
1272 log_link_debug(link
, "Set link");
1274 r
= sd_netlink_message_get_errno(m
);
1275 if (r
< 0 && r
!= -EEXIST
) {
1276 log_link_error_errno(link
, r
, "Could not join netdev: %m");
1277 link_enter_failed(link
);
1284 static int set_mtu_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
1285 _cleanup_(link_unrefp
) Link
*link
= userdata
;
1290 assert(link
->ifname
);
1292 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1295 r
= sd_netlink_message_get_errno(m
);
1297 log_link_warning_errno(link
, r
, "Could not set MTU: %m");
1302 int link_set_mtu(Link
*link
, uint32_t mtu
) {
1303 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1307 assert(link
->manager
);
1308 assert(link
->manager
->rtnl
);
1310 log_link_debug(link
, "Setting MTU: %" PRIu32
, mtu
);
1312 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1314 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1316 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
1317 for this interface, or if it is a bridge slave, then disable IPv6 else enable it. */
1318 (void) link_enable_ipv6(link
);
1320 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
1321 on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1322 if (link_ipv6_enabled(link
) && link
->network
->mtu
< IPV6_MIN_MTU
) {
1324 log_link_warning(link
, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU
) ", as "
1325 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU
) " bytes: %m");
1327 link
->network
->mtu
= IPV6_MIN_MTU
;
1330 r
= sd_netlink_message_append_u32(req
, IFLA_MTU
, link
->network
->mtu
);
1332 return log_link_error_errno(link
, r
, "Could not set MTU: %m");
1334 r
= sd_netlink_message_append_u32(req
, IFLA_MTU
, mtu
);
1336 return log_link_error_errno(link
, r
, "Could not append MTU: %m");
1338 r
= sd_netlink_call_async(link
->manager
->rtnl
, req
, set_mtu_handler
, link
, 0, NULL
);
1340 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1342 link
->setting_mtu
= true;
1349 static int set_flags_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
1350 _cleanup_(link_unrefp
) Link
*link
= userdata
;
1355 assert(link
->ifname
);
1357 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1360 r
= sd_netlink_message_get_errno(m
);
1362 log_link_warning_errno(link
, r
, "Could not set link flags: %m");
1367 static int link_set_flags(Link
*link
) {
1368 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1369 unsigned ifi_change
= 0;
1370 unsigned ifi_flags
= 0;
1374 assert(link
->manager
);
1375 assert(link
->manager
->rtnl
);
1377 if (link
->flags
& IFF_LOOPBACK
)
1383 if (link
->network
->arp
< 0 && link
->network
->multicast
< 0 && link
->network
->allmulticast
< 0)
1386 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1388 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1390 if (link
->network
->arp
>= 0) {
1391 ifi_change
|= IFF_NOARP
;
1392 SET_FLAG(ifi_flags
, IFF_NOARP
, link
->network
->arp
== 0);
1395 if (link
->network
->multicast
>= 0) {
1396 ifi_change
|= IFF_MULTICAST
;
1397 SET_FLAG(ifi_flags
, IFF_MULTICAST
, link
->network
->multicast
);
1400 if (link
->network
->allmulticast
>= 0) {
1401 ifi_change
|= IFF_ALLMULTI
;
1402 SET_FLAG(ifi_flags
, IFF_ALLMULTI
, link
->network
->allmulticast
);
1405 r
= sd_rtnl_message_link_set_flags(req
, ifi_flags
, ifi_change
);
1407 return log_link_error_errno(link
, r
, "Could not set link flags: %m");
1409 r
= sd_netlink_call_async(link
->manager
->rtnl
, req
, set_flags_handler
, link
, 0, NULL
);
1411 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1418 static int link_set_bridge(Link
*link
) {
1419 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1423 assert(link
->network
);
1425 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1427 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1429 r
= sd_rtnl_message_link_set_family(req
, PF_BRIDGE
);
1431 return log_link_error_errno(link
, r
, "Could not set message family: %m");
1433 r
= sd_netlink_message_open_container(req
, IFLA_PROTINFO
);
1435 return log_link_error_errno(link
, r
, "Could not append IFLA_PROTINFO attribute: %m");
1437 if (link
->network
->use_bpdu
>= 0) {
1438 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_GUARD
, link
->network
->use_bpdu
);
1440 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1443 if (link
->network
->hairpin
>= 0) {
1444 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_MODE
, link
->network
->hairpin
);
1446 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_MODE attribute: %m");
1449 if (link
->network
->fast_leave
>= 0) {
1450 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_FAST_LEAVE
, link
->network
->fast_leave
);
1452 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1455 if (link
->network
->allow_port_to_be_root
>= 0) {
1456 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_PROTECT
, link
->network
->allow_port_to_be_root
);
1458 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
1462 if (link
->network
->unicast_flood
>= 0) {
1463 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_UNICAST_FLOOD
, link
->network
->unicast_flood
);
1465 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
1469 if (link
->network
->cost
!= 0) {
1470 r
= sd_netlink_message_append_u32(req
, IFLA_BRPORT_COST
, link
->network
->cost
);
1472 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_COST attribute: %m");
1474 if (link
->network
->priority
!= LINK_BRIDGE_PORT_PRIORITY_INVALID
) {
1475 r
= sd_netlink_message_append_u16(req
, IFLA_BRPORT_PRIORITY
, link
->network
->priority
);
1477 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1480 r
= sd_netlink_message_close_container(req
);
1482 return log_link_error_errno(link
, r
, "Could not append IFLA_LINKINFO attribute: %m");
1484 r
= sd_netlink_call_async(link
->manager
->rtnl
, req
, link_set_handler
, link
, 0, NULL
);
1486 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1493 static int link_bond_set(Link
*link
) {
1494 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1498 assert(link
->network
);
1500 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_NEWLINK
, link
->network
->bond
->ifindex
);
1502 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1504 r
= sd_netlink_message_set_flags(req
, NLM_F_REQUEST
| NLM_F_ACK
);
1506 return log_link_error_errno(link
, r
, "Could not set netlink flags: %m");
1508 r
= sd_netlink_message_open_container(req
, IFLA_LINKINFO
);
1510 return log_link_error_errno(link
, r
, "Could not append IFLA_PROTINFO attribute: %m");
1512 r
= sd_netlink_message_open_container_union(req
, IFLA_INFO_DATA
, "bond");
1514 return log_link_error_errno(link
, r
, "Could not append IFLA_INFO_DATA attribute: %m");
1516 if (link
->network
->active_slave
) {
1517 r
= sd_netlink_message_append_u32(req
, IFLA_BOND_ACTIVE_SLAVE
, link
->ifindex
);
1519 return log_link_error_errno(link
, r
, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1522 if (link
->network
->primary_slave
) {
1523 r
= sd_netlink_message_append_u32(req
, IFLA_BOND_PRIMARY
, link
->ifindex
);
1525 return log_link_error_errno(link
, r
, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1528 r
= sd_netlink_message_close_container(req
);
1530 return log_link_error_errno(link
, r
, "Could not append IFLA_LINKINFO attribute: %m");
1532 r
= sd_netlink_message_close_container(req
);
1534 return log_link_error_errno(link
, r
, "Could not append IFLA_INFO_DATA attribute: %m");
1536 r
= sd_netlink_call_async(link
->manager
->rtnl
, req
, set_flags_handler
, link
, 0, NULL
);
1538 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1545 static int link_lldp_save(Link
*link
) {
1546 _cleanup_free_
char *temp_path
= NULL
;
1547 _cleanup_fclose_
FILE *f
= NULL
;
1548 sd_lldp_neighbor
**l
= NULL
;
1552 assert(link
->lldp_file
);
1555 (void) unlink(link
->lldp_file
);
1559 r
= sd_lldp_get_neighbors(link
->lldp
, &l
);
1563 (void) unlink(link
->lldp_file
);
1569 r
= fopen_temporary(link
->lldp_file
, &f
, &temp_path
);
1573 fchmod(fileno(f
), 0644);
1575 for (i
= 0; i
< n
; i
++) {
1580 r
= sd_lldp_neighbor_get_raw(l
[i
], &p
, &sz
);
1585 (void) fwrite(&u
, 1, sizeof(u
), f
);
1586 (void) fwrite(p
, 1, sz
, f
);
1589 r
= fflush_and_check(f
);
1593 if (rename(temp_path
, link
->lldp_file
) < 0) {
1600 (void) unlink(link
->lldp_file
);
1602 (void) unlink(temp_path
);
1604 log_link_error_errno(link
, r
, "Failed to save LLDP data to %s: %m", link
->lldp_file
);
1608 for (i
= 0; i
< n
; i
++)
1609 sd_lldp_neighbor_unref(l
[i
]);
1616 static void lldp_handler(sd_lldp
*lldp
, sd_lldp_event event
, sd_lldp_neighbor
*n
, void *userdata
) {
1617 Link
*link
= userdata
;
1622 (void) link_lldp_save(link
);
1624 if (link_lldp_emit_enabled(link
) && event
== SD_LLDP_EVENT_ADDED
) {
1625 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1627 log_link_debug(link
, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1629 r
= link_lldp_emit_start(link
);
1631 log_link_warning_errno(link
, r
, "Failed to restart LLDP transmission: %m");
1635 static int link_acquire_ipv6_conf(Link
*link
) {
1640 if (link_dhcp6_enabled(link
)) {
1641 assert(link
->dhcp6_client
);
1642 assert(in_addr_is_link_local(AF_INET6
, (const union in_addr_union
*)&link
->ipv6ll_address
) > 0);
1644 /* start DHCPv6 client in stateless mode */
1645 r
= dhcp6_request_address(link
, true);
1646 if (r
< 0 && r
!= -EBUSY
)
1647 return log_link_warning_errno(link
, r
, "Could not acquire DHCPv6 lease: %m");
1649 log_link_debug(link
, "Acquiring DHCPv6 lease");
1652 if (link_ipv6_accept_ra_enabled(link
)) {
1653 assert(link
->ndisc
);
1655 log_link_debug(link
, "Discovering IPv6 routers");
1657 r
= sd_ndisc_start(link
->ndisc
);
1658 if (r
< 0 && r
!= -EBUSY
)
1659 return log_link_warning_errno(link
, r
, "Could not start IPv6 Router Discovery: %m");
1662 if (link_radv_enabled(link
)) {
1664 assert(in_addr_is_link_local(AF_INET6
, (const union in_addr_union
*)&link
->ipv6ll_address
) > 0);
1666 log_link_debug(link
, "Starting IPv6 Router Advertisements");
1668 r
= sd_radv_start(link
->radv
);
1669 if (r
< 0 && r
!= -EBUSY
)
1670 return log_link_warning_errno(link
, r
, "Could not start IPv6 Router Advertisement: %m");
1676 static int link_acquire_ipv4_conf(Link
*link
) {
1680 assert(link
->network
);
1681 assert(link
->manager
);
1682 assert(link
->manager
->event
);
1684 if (link_ipv4ll_enabled(link
)) {
1685 assert(link
->ipv4ll
);
1687 log_link_debug(link
, "Acquiring IPv4 link-local address");
1689 r
= sd_ipv4ll_start(link
->ipv4ll
);
1691 return log_link_warning_errno(link
, r
, "Could not acquire IPv4 link-local address: %m");
1694 if (link_dhcp4_enabled(link
)) {
1695 assert(link
->dhcp_client
);
1697 log_link_debug(link
, "Acquiring DHCPv4 lease");
1699 r
= sd_dhcp_client_start(link
->dhcp_client
);
1701 return log_link_warning_errno(link
, r
, "Could not acquire DHCPv4 lease: %m");
1707 static int link_acquire_conf(Link
*link
) {
1712 if (link
->setting_mtu
) {
1713 link
->setting_mtu
= false;
1717 r
= link_acquire_ipv4_conf(link
);
1721 if (in_addr_is_null(AF_INET6
, (const union in_addr_union
*) &link
->ipv6ll_address
) == 0) {
1722 r
= link_acquire_ipv6_conf(link
);
1727 if (link_lldp_emit_enabled(link
)) {
1728 r
= link_lldp_emit_start(link
);
1730 return log_link_warning_errno(link
, r
, "Failed to start LLDP transmission: %m");
1736 bool link_has_carrier(Link
*link
) {
1737 /* see Documentation/networking/operstates.txt in the kernel sources */
1739 if (link
->kernel_operstate
== IF_OPER_UP
)
1742 if (link
->kernel_operstate
== IF_OPER_UNKNOWN
)
1743 /* operstate may not be implemented, so fall back to flags */
1744 if ((link
->flags
& IFF_LOWER_UP
) && !(link
->flags
& IFF_DORMANT
))
1750 static int link_up_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
1751 _cleanup_(link_unrefp
) Link
*link
= userdata
;
1756 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1759 r
= sd_netlink_message_get_errno(m
);
1761 /* we warn but don't fail the link, as it may be
1763 log_link_warning_errno(link
, r
, "Could not bring up interface: %m");
1768 int link_up(Link
*link
) {
1769 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1770 uint8_t ipv6ll_mode
;
1774 assert(link
->network
);
1775 assert(link
->manager
);
1776 assert(link
->manager
->rtnl
);
1778 log_link_debug(link
, "Bringing link up");
1780 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1782 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1784 /* set it free if not enslaved with networkd */
1785 if (!link
->network
->bridge
&& !link
->network
->bond
&& !link
->network
->vrf
) {
1786 r
= sd_netlink_message_append_u32(req
, IFLA_MASTER
, 0);
1788 return log_link_error_errno(link
, r
, "Could not append IFLA_MASTER attribute: %m");
1791 r
= sd_rtnl_message_link_set_flags(req
, IFF_UP
, IFF_UP
);
1793 return log_link_error_errno(link
, r
, "Could not set link flags: %m");
1795 if (link
->network
->mac
) {
1796 r
= sd_netlink_message_append_ether_addr(req
, IFLA_ADDRESS
, link
->network
->mac
);
1798 return log_link_error_errno(link
, r
, "Could not set MAC address: %m");
1801 r
= sd_netlink_message_open_container(req
, IFLA_AF_SPEC
);
1803 return log_link_error_errno(link
, r
, "Could not open IFLA_AF_SPEC container: %m");
1805 if (link_ipv6_enabled(link
)) {
1806 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1807 r
= sd_netlink_message_open_container(req
, AF_INET6
);
1809 return log_link_error_errno(link
, r
, "Could not open AF_INET6 container: %m");
1811 if (!link_ipv6ll_enabled(link
))
1812 ipv6ll_mode
= IN6_ADDR_GEN_MODE_NONE
;
1814 const char *p
= NULL
;
1815 _cleanup_free_
char *stable_secret
= NULL
;
1817 p
= strjoina("/proc/sys/net/ipv6/conf/", link
->ifname
, "/stable_secret");
1818 r
= read_one_line_file(p
, &stable_secret
);
1821 ipv6ll_mode
= IN6_ADDR_GEN_MODE_EUI64
;
1823 ipv6ll_mode
= IN6_ADDR_GEN_MODE_STABLE_PRIVACY
;
1825 r
= sd_netlink_message_append_u8(req
, IFLA_INET6_ADDR_GEN_MODE
, ipv6ll_mode
);
1827 return log_link_error_errno(link
, r
, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1829 if (!in_addr_is_null(AF_INET6
, &link
->network
->ipv6_token
)) {
1830 r
= sd_netlink_message_append_in6_addr(req
, IFLA_INET6_TOKEN
, &link
->network
->ipv6_token
.in6
);
1832 return log_link_error_errno(link
, r
, "Could not append IFLA_INET6_TOKEN: %m");
1835 r
= sd_netlink_message_close_container(req
);
1837 return log_link_error_errno(link
, r
, "Could not close AF_INET6 container: %m");
1840 r
= sd_netlink_message_close_container(req
);
1842 return log_link_error_errno(link
, r
, "Could not close IFLA_AF_SPEC container: %m");
1844 r
= sd_netlink_call_async(link
->manager
->rtnl
, req
, link_up_handler
, link
, 0, NULL
);
1846 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1853 static int link_up_can(Link
*link
) {
1854 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1859 log_link_debug(link
, "Bringing CAN link up");
1861 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1863 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1865 r
= sd_rtnl_message_link_set_flags(req
, IFF_UP
, IFF_UP
);
1867 return log_link_error_errno(link
, r
, "Could not set link flags: %m");
1869 r
= sd_netlink_call_async(link
->manager
->rtnl
, req
, link_up_handler
, link
, 0, NULL
);
1871 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1878 static int link_set_can(Link
*link
) {
1879 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*m
= NULL
;
1883 assert(link
->network
);
1884 assert(link
->manager
);
1885 assert(link
->manager
->rtnl
);
1887 log_link_debug(link
, "link_set_can");
1889 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &m
, RTM_NEWLINK
, link
->ifindex
);
1891 return log_link_error_errno(link
, r
, "Failed to allocate netlink message: %m");
1893 r
= sd_netlink_message_set_flags(m
, NLM_F_REQUEST
| NLM_F_ACK
);
1895 return log_link_error_errno(link
, r
, "Could not set netlink flags: %m");
1897 r
= sd_netlink_message_open_container(m
, IFLA_LINKINFO
);
1899 return log_link_error_errno(link
, r
, "Failed to open netlink container: %m");
1901 r
= sd_netlink_message_open_container_union(m
, IFLA_INFO_DATA
, link
->kind
);
1903 return log_link_error_errno(link
, r
, "Could not append IFLA_INFO_DATA attribute: %m");
1905 if (link
->network
->can_bitrate
> 0 || link
->network
->can_sample_point
> 0) {
1906 struct can_bittiming bt
= {
1907 .bitrate
= link
->network
->can_bitrate
,
1908 .sample_point
= link
->network
->can_sample_point
,
1911 if (link
->network
->can_bitrate
> UINT32_MAX
) {
1912 log_link_error(link
, "bitrate (%zu) too big.", link
->network
->can_bitrate
);
1916 log_link_debug(link
, "Setting bitrate = %d bit/s", bt
.bitrate
);
1917 if (link
->network
->can_sample_point
> 0)
1918 log_link_debug(link
, "Setting sample point = %d.%d%%", bt
.sample_point
/ 10, bt
.sample_point
% 10);
1920 log_link_debug(link
, "Using default sample point");
1922 r
= sd_netlink_message_append_data(m
, IFLA_CAN_BITTIMING
, &bt
, sizeof(bt
));
1924 return log_link_error_errno(link
, r
, "Could not append IFLA_CAN_BITTIMING attribute: %m");
1927 if (link
->network
->can_restart_us
> 0) {
1928 char time_string
[FORMAT_TIMESPAN_MAX
];
1929 uint64_t restart_ms
;
1931 if (link
->network
->can_restart_us
== USEC_INFINITY
)
1934 restart_ms
= DIV_ROUND_UP(link
->network
->can_restart_us
, USEC_PER_MSEC
);
1936 format_timespan(time_string
, FORMAT_TIMESPAN_MAX
, restart_ms
* 1000, MSEC_PER_SEC
);
1938 if (restart_ms
> UINT32_MAX
) {
1939 log_link_error(link
, "restart timeout (%s) too big.", time_string
);
1943 log_link_debug(link
, "Setting restart = %s", time_string
);
1945 r
= sd_netlink_message_append_u32(m
, IFLA_CAN_RESTART_MS
, restart_ms
);
1947 return log_link_error_errno(link
, r
, "Could not append IFLA_CAN_RESTART_MS attribute: %m");
1950 r
= sd_netlink_message_close_container(m
);
1952 return log_link_error_errno(link
, r
, "Failed to close netlink container: %m");
1954 r
= sd_netlink_message_close_container(m
);
1956 return log_link_error_errno(link
, r
, "Failed to close netlink container: %m");
1958 r
= sd_netlink_call_async(link
->manager
->rtnl
, m
, link_set_handler
, link
, 0, NULL
);
1960 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1964 if (!(link
->flags
& IFF_UP
)) {
1965 r
= link_up_can(link
);
1967 link_enter_failed(link
);
1972 log_link_debug(link
, "link_set_can done");
1977 static int link_down_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
1978 _cleanup_(link_unrefp
) Link
*link
= userdata
;
1983 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1986 r
= sd_netlink_message_get_errno(m
);
1988 log_link_warning_errno(link
, r
, "Could not bring down interface: %m");
1990 if (streq_ptr(link
->kind
, "can")) {
1998 int link_down(Link
*link
) {
1999 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
2003 assert(link
->manager
);
2004 assert(link
->manager
->rtnl
);
2006 log_link_debug(link
, "Bringing link down");
2008 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
,
2009 RTM_SETLINK
, link
->ifindex
);
2011 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
2013 r
= sd_rtnl_message_link_set_flags(req
, 0, IFF_UP
);
2015 return log_link_error_errno(link
, r
, "Could not set link flags: %m");
2017 r
= sd_netlink_call_async(link
->manager
->rtnl
, req
, link_down_handler
, link
, 0, NULL
);
2019 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
2026 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
, i
)
2042 if (link_has_carrier(l
)) {
2047 if (!required_up
&& link_is_up
) {
2048 r
= link_down(link
);
2051 } else if (required_up
&& !link_is_up
) {
2060 static int link_handle_bound_by_list(Link
*link
) {
2067 if (hashmap_isempty(link
->bound_by_links
))
2070 HASHMAP_FOREACH (l
, link
->bound_by_links
, i
) {
2071 r
= link_handle_bound_to_list(l
);
2079 static int link_put_carrier(Link
*link
, Link
*carrier
, Hashmap
**h
) {
2085 if (link
== carrier
)
2088 if (hashmap_get(*h
, INT_TO_PTR(carrier
->ifindex
)))
2091 r
= hashmap_ensure_allocated(h
, NULL
);
2095 r
= hashmap_put(*h
, INT_TO_PTR(carrier
->ifindex
), carrier
);
2102 static int link_new_bound_by_list(Link
*link
) {
2107 bool list_updated
= false;
2110 assert(link
->manager
);
2114 HASHMAP_FOREACH(carrier
, m
->links
, i
) {
2115 if (!carrier
->network
)
2118 if (strv_isempty(carrier
->network
->bind_carrier
))
2121 if (strv_fnmatch(carrier
->network
->bind_carrier
, link
->ifname
, 0)) {
2122 r
= link_put_carrier(link
, carrier
, &link
->bound_by_links
);
2126 list_updated
= true;
2133 HASHMAP_FOREACH(carrier
, link
->bound_by_links
, i
) {
2134 r
= link_put_carrier(carrier
, link
, &carrier
->bound_to_links
);
2138 link_dirty(carrier
);
2144 static int link_new_bound_to_list(Link
*link
) {
2149 bool list_updated
= false;
2152 assert(link
->manager
);
2157 if (strv_isempty(link
->network
->bind_carrier
))
2162 HASHMAP_FOREACH (carrier
, m
->links
, i
) {
2163 if (strv_fnmatch(link
->network
->bind_carrier
, carrier
->ifname
, 0)) {
2164 r
= link_put_carrier(link
, carrier
, &link
->bound_to_links
);
2168 list_updated
= true;
2175 HASHMAP_FOREACH (carrier
, link
->bound_to_links
, i
) {
2176 r
= link_put_carrier(carrier
, link
, &carrier
->bound_by_links
);
2180 link_dirty(carrier
);
2186 static int link_new_carrier_maps(Link
*link
) {
2189 r
= link_new_bound_by_list(link
);
2193 r
= link_handle_bound_by_list(link
);
2197 r
= link_new_bound_to_list(link
);
2201 r
= link_handle_bound_to_list(link
);
2208 static void link_free_bound_to_list(Link
*link
) {
2212 HASHMAP_FOREACH (bound_to
, link
->bound_to_links
, i
) {
2213 hashmap_remove(link
->bound_to_links
, INT_TO_PTR(bound_to
->ifindex
));
2215 if (hashmap_remove(bound_to
->bound_by_links
, INT_TO_PTR(link
->ifindex
)))
2216 link_dirty(bound_to
);
2222 static void link_free_bound_by_list(Link
*link
) {
2226 HASHMAP_FOREACH (bound_by
, link
->bound_by_links
, i
) {
2227 hashmap_remove(link
->bound_by_links
, INT_TO_PTR(bound_by
->ifindex
));
2229 if (hashmap_remove(bound_by
->bound_to_links
, INT_TO_PTR(link
->ifindex
))) {
2230 link_dirty(bound_by
);
2231 link_handle_bound_to_list(bound_by
);
2238 static void link_free_carrier_maps(Link
*link
) {
2239 bool list_updated
= false;
2243 if (!hashmap_isempty(link
->bound_to_links
)) {
2244 link_free_bound_to_list(link
);
2245 list_updated
= true;
2248 if (!hashmap_isempty(link
->bound_by_links
)) {
2249 link_free_bound_by_list(link
);
2250 list_updated
= true;
2259 void link_drop(Link
*link
) {
2260 if (!link
|| link
->state
== LINK_STATE_LINGER
)
2263 link_set_state(link
, LINK_STATE_LINGER
);
2265 link_free_carrier_maps(link
);
2267 log_link_debug(link
, "Link removed");
2269 (void) unlink(link
->state_file
);
2275 static int link_joined(Link
*link
) {
2279 assert(link
->network
);
2281 if (!hashmap_isempty(link
->bound_to_links
)) {
2282 r
= link_handle_bound_to_list(link
);
2285 } else if (!(link
->flags
& IFF_UP
)) {
2288 link_enter_failed(link
);
2293 if (link
->network
->bridge
) {
2294 r
= link_set_bridge(link
);
2296 log_link_error_errno(link
, r
, "Could not set bridge message: %m");
2299 if (link
->network
->bond
) {
2300 r
= link_bond_set(link
);
2302 log_link_error_errno(link
, r
, "Could not set bond message: %m");
2305 if (link
->network
->use_br_vlan
&&
2306 (link
->network
->bridge
|| streq_ptr("bridge", link
->kind
))) {
2307 r
= link_set_bridge_vlan(link
);
2309 log_link_error_errno(link
, r
, "Could not set bridge vlan: %m");
2312 /* Skip setting up addresses until it gets carrier,
2313 or it would try to set addresses twice,
2314 which is bad for non-idempotent steps. */
2315 if (!link_has_carrier(link
) && !link
->network
->configure_without_carrier
)
2318 return link_enter_set_addresses(link
);
2321 static int netdev_join_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
2322 _cleanup_(link_unrefp
) Link
*link
= userdata
;
2326 assert(link
->network
);
2330 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
2333 r
= sd_netlink_message_get_errno(m
);
2334 if (r
< 0 && r
!= -EEXIST
) {
2335 log_link_error_errno(link
, r
, "Could not join netdev: %m");
2336 link_enter_failed(link
);
2339 log_link_debug(link
, "Joined netdev");
2341 if (link
->enslaving
<= 0)
2347 static int link_enter_join_netdev(Link
*link
) {
2353 assert(link
->network
);
2354 assert(link
->state
== LINK_STATE_PENDING
);
2356 link_set_state(link
, LINK_STATE_ENSLAVING
);
2360 if (!link
->network
->bridge
&&
2361 !link
->network
->bond
&&
2362 !link
->network
->vrf
&&
2363 hashmap_isempty(link
->network
->stacked_netdevs
))
2364 return link_joined(link
);
2366 if (link
->network
->bond
) {
2367 log_struct(LOG_DEBUG
,
2368 LOG_LINK_INTERFACE(link
),
2369 LOG_NETDEV_INTERFACE(link
->network
->bond
),
2370 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", link
->network
->bond
->ifname
));
2372 r
= netdev_join(link
->network
->bond
, link
, netdev_join_handler
);
2374 log_struct_errno(LOG_WARNING
, r
,
2375 LOG_LINK_INTERFACE(link
),
2376 LOG_NETDEV_INTERFACE(link
->network
->bond
),
2377 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", link
->network
->bond
->ifname
));
2378 link_enter_failed(link
);
2385 if (link
->network
->bridge
) {
2386 log_struct(LOG_DEBUG
,
2387 LOG_LINK_INTERFACE(link
),
2388 LOG_NETDEV_INTERFACE(link
->network
->bridge
),
2389 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", link
->network
->bridge
->ifname
));
2391 r
= netdev_join(link
->network
->bridge
, link
, netdev_join_handler
);
2393 log_struct_errno(LOG_WARNING
, r
,
2394 LOG_LINK_INTERFACE(link
),
2395 LOG_NETDEV_INTERFACE(link
->network
->bridge
),
2396 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", link
->network
->bridge
->ifname
));
2397 link_enter_failed(link
);
2404 if (link
->network
->vrf
) {
2405 log_struct(LOG_DEBUG
,
2406 LOG_LINK_INTERFACE(link
),
2407 LOG_NETDEV_INTERFACE(link
->network
->vrf
),
2408 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", link
->network
->vrf
->ifname
));
2410 r
= netdev_join(link
->network
->vrf
, link
, netdev_join_handler
);
2412 log_struct_errno(LOG_WARNING
, r
,
2413 LOG_LINK_INTERFACE(link
),
2414 LOG_NETDEV_INTERFACE(link
->network
->vrf
),
2415 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", link
->network
->vrf
->ifname
));
2416 link_enter_failed(link
);
2423 HASHMAP_FOREACH(netdev
, link
->network
->stacked_netdevs
, i
) {
2425 if (netdev
->ifindex
> 0) {
2430 log_struct(LOG_DEBUG
,
2431 LOG_LINK_INTERFACE(link
),
2432 LOG_NETDEV_INTERFACE(netdev
),
2433 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", netdev
->ifname
));
2435 r
= netdev_join(netdev
, link
, netdev_join_handler
);
2437 log_struct_errno(LOG_WARNING
, r
,
2438 LOG_LINK_INTERFACE(link
),
2439 LOG_NETDEV_INTERFACE(netdev
),
2440 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", netdev
->ifname
));
2441 link_enter_failed(link
);
2451 static int link_set_ipv4_forward(Link
*link
) {
2454 if (!link_ipv4_forward_enabled(link
))
2457 /* We propagate the forwarding flag from one interface to the
2458 * global setting one way. This means: as long as at least one
2459 * interface was configured at any time that had IP forwarding
2460 * enabled the setting will stay on for good. We do this
2461 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2462 * somewhat in sync (see below). */
2464 r
= write_string_file("/proc/sys/net/ipv4/ip_forward", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE
);
2466 log_link_warning_errno(link
, r
, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
2471 static int link_set_ipv6_forward(Link
*link
) {
2474 if (!link_ipv6_forward_enabled(link
))
2477 /* On Linux, the IPv6 stack does not know a per-interface
2478 * packet forwarding setting: either packet forwarding is on
2479 * for all, or off for all. We hence don't bother with a
2480 * per-interface setting, but simply propagate the interface
2481 * flag, if it is set, to the global flag, one-way. Note that
2482 * while IPv4 would allow a per-interface flag, we expose the
2483 * same behaviour there and also propagate the setting from
2484 * one to all, to keep things simple (see above). */
2486 r
= write_string_file("/proc/sys/net/ipv6/conf/all/forwarding", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE
);
2488 log_link_warning_errno(link
, r
, "Cannot configure IPv6 packet forwarding, ignoring: %m");
2493 static int link_set_ipv6_privacy_extensions(Link
*link
) {
2494 char buf
[DECIMAL_STR_MAX(unsigned) + 1];
2495 IPv6PrivacyExtensions s
;
2496 const char *p
= NULL
;
2499 s
= link_ipv6_privacy_extensions(link
);
2503 p
= strjoina("/proc/sys/net/ipv6/conf/", link
->ifname
, "/use_tempaddr");
2504 xsprintf(buf
, "%u", (unsigned) link
->network
->ipv6_privacy_extensions
);
2506 r
= write_string_file(p
, buf
, WRITE_STRING_FILE_VERIFY_ON_FAILURE
);
2508 log_link_warning_errno(link
, r
, "Cannot configure IPv6 privacy extension for interface: %m");
2513 static int link_set_ipv6_accept_ra(Link
*link
) {
2514 const char *p
= NULL
;
2517 /* Make this a NOP if IPv6 is not available */
2518 if (!socket_ipv6_is_supported())
2521 if (link
->flags
& IFF_LOOPBACK
)
2527 p
= strjoina("/proc/sys/net/ipv6/conf/", link
->ifname
, "/accept_ra");
2529 /* We handle router advertisements ourselves, tell the kernel to GTFO */
2530 r
= write_string_file(p
, "0", WRITE_STRING_FILE_VERIFY_ON_FAILURE
);
2532 log_link_warning_errno(link
, r
, "Cannot disable kernel IPv6 accept_ra for interface: %m");
2537 static int link_set_ipv6_dad_transmits(Link
*link
) {
2538 char buf
[DECIMAL_STR_MAX(int) + 1];
2539 const char *p
= NULL
;
2542 /* Make this a NOP if IPv6 is not available */
2543 if (!socket_ipv6_is_supported())
2546 if (link
->flags
& IFF_LOOPBACK
)
2552 if (link
->network
->ipv6_dad_transmits
< 0)
2555 p
= strjoina("/proc/sys/net/ipv6/conf/", link
->ifname
, "/dad_transmits");
2556 xsprintf(buf
, "%i", link
->network
->ipv6_dad_transmits
);
2558 r
= write_string_file(p
, buf
, WRITE_STRING_FILE_VERIFY_ON_FAILURE
);
2560 log_link_warning_errno(link
, r
, "Cannot set IPv6 dad transmits for interface: %m");
2565 static int link_set_ipv6_hop_limit(Link
*link
) {
2566 char buf
[DECIMAL_STR_MAX(int) + 1];
2567 const char *p
= NULL
;
2570 /* Make this a NOP if IPv6 is not available */
2571 if (!socket_ipv6_is_supported())
2574 if (link
->flags
& IFF_LOOPBACK
)
2580 if (link
->network
->ipv6_hop_limit
< 0)
2583 p
= strjoina("/proc/sys/net/ipv6/conf/", link
->ifname
, "/hop_limit");
2584 xsprintf(buf
, "%i", link
->network
->ipv6_hop_limit
);
2586 r
= write_string_file(p
, buf
, WRITE_STRING_FILE_VERIFY_ON_FAILURE
);
2588 log_link_warning_errno(link
, r
, "Cannot set IPv6 hop limit for interface: %m");
2593 static int link_set_ipv6_mtu(Link
*link
) {
2594 char buf
[DECIMAL_STR_MAX(unsigned) + 1];
2595 const char *p
= NULL
;
2598 /* Make this a NOP if IPv6 is not available */
2599 if (!socket_ipv6_is_supported())
2602 if (link
->flags
& IFF_LOOPBACK
)
2605 if (link
->network
->ipv6_mtu
== 0)
2608 p
= strjoina("/proc/sys/net/ipv6/conf/", link
->ifname
, "/mtu");
2610 xsprintf(buf
, "%" PRIu32
, link
->network
->ipv6_mtu
);
2612 r
= write_string_file(p
, buf
, 0);
2614 log_link_warning_errno(link
, r
, "Cannot set IPv6 MTU for interface: %m");
2619 static int link_drop_foreign_config(Link
*link
) {
2625 SET_FOREACH(address
, link
->addresses_foreign
, i
) {
2626 /* we consider IPv6LL addresses to be managed by the kernel */
2627 if (address
->family
== AF_INET6
&& in_addr_is_link_local(AF_INET6
, &address
->in_addr
) == 1)
2630 r
= address_remove(address
, link
, link_address_remove_handler
);
2635 SET_FOREACH(route
, link
->routes_foreign
, i
) {
2636 /* do not touch routes managed by the kernel */
2637 if (route
->protocol
== RTPROT_KERNEL
)
2640 r
= route_remove(route
, link
, link_route_remove_handler
);
2648 static int link_drop_config(Link
*link
) {
2649 Address
*address
, *pool_address
;
2654 SET_FOREACH(address
, link
->addresses
, i
) {
2655 /* we consider IPv6LL addresses to be managed by the kernel */
2656 if (address
->family
== AF_INET6
&& in_addr_is_link_local(AF_INET6
, &address
->in_addr
) == 1)
2659 r
= address_remove(address
, link
, link_address_remove_handler
);
2663 /* If this address came from an address pool, clean up the pool */
2664 LIST_FOREACH(addresses
, pool_address
, link
->pool_addresses
) {
2665 if (address_equal(address
, pool_address
)) {
2666 LIST_REMOVE(addresses
, link
->pool_addresses
, pool_address
);
2667 address_free(pool_address
);
2673 SET_FOREACH(route
, link
->routes
, i
) {
2674 /* do not touch routes managed by the kernel */
2675 if (route
->protocol
== RTPROT_KERNEL
)
2678 r
= route_remove(route
, link
, link_route_remove_handler
);
2688 static int link_update_lldp(Link
*link
) {
2696 if (link
->flags
& IFF_UP
) {
2697 r
= sd_lldp_start(link
->lldp
);
2699 log_link_debug(link
, "Started LLDP.");
2701 r
= sd_lldp_stop(link
->lldp
);
2703 log_link_debug(link
, "Stopped LLDP.");
2709 static int link_configure_can(Link
*link
) {
2712 if (streq_ptr(link
->kind
, "can")) {
2713 /* The CAN interface must be down to configure bitrate, etc... */
2714 if ((link
->flags
& IFF_UP
)) {
2715 r
= link_down(link
);
2717 link_enter_failed(link
);
2724 return link_set_can(link
);
2727 if (!(link
->flags
& IFF_UP
)) {
2728 r
= link_up_can(link
);
2730 link_enter_failed(link
);
2738 static int link_configure(Link
*link
) {
2742 assert(link
->network
);
2743 assert(link
->state
== LINK_STATE_PENDING
);
2745 if (STRPTR_IN_SET(link
->kind
, "can", "vcan"))
2746 return link_configure_can(link
);
2748 /* Drop foreign config, but ignore loopback or critical devices.
2749 * We do not want to remove loopback address or addresses used for root NFS. */
2750 if (!(link
->flags
& IFF_LOOPBACK
) && !(link
->network
->dhcp_critical
)) {
2751 r
= link_drop_foreign_config(link
);
2756 r
= link_set_proxy_arp(link
);
2760 r
= ipv6_proxy_ndp_addresses_configure(link
);
2764 r
= link_set_ipv4_forward(link
);
2768 r
= link_set_ipv6_forward(link
);
2772 r
= link_set_ipv6_privacy_extensions(link
);
2776 r
= link_set_ipv6_accept_ra(link
);
2780 r
= link_set_ipv6_dad_transmits(link
);
2784 r
= link_set_ipv6_hop_limit(link
);
2788 r
= link_set_flags(link
);
2792 r
= link_set_ipv6_mtu(link
);
2796 if (link_ipv4ll_enabled(link
)) {
2797 r
= ipv4ll_configure(link
);
2802 if (link_dhcp4_enabled(link
)) {
2803 r
= dhcp4_set_promote_secondaries(link
);
2807 r
= dhcp4_configure(link
);
2812 if (link_dhcp4_server_enabled(link
)) {
2813 r
= sd_dhcp_server_new(&link
->dhcp_server
, link
->ifindex
);
2817 r
= sd_dhcp_server_attach_event(link
->dhcp_server
, NULL
, 0);
2822 if (link_dhcp6_enabled(link
) ||
2823 link_ipv6_accept_ra_enabled(link
)) {
2824 r
= dhcp6_configure(link
);
2829 if (link_ipv6_accept_ra_enabled(link
)) {
2830 r
= ndisc_configure(link
);
2835 if (link_radv_enabled(link
)) {
2836 r
= radv_configure(link
);
2841 if (link_lldp_rx_enabled(link
)) {
2842 r
= sd_lldp_new(&link
->lldp
);
2846 r
= sd_lldp_set_ifindex(link
->lldp
, link
->ifindex
);
2850 r
= sd_lldp_match_capabilities(link
->lldp
,
2851 link
->network
->lldp_mode
== LLDP_MODE_ROUTERS_ONLY
?
2852 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS
:
2853 SD_LLDP_SYSTEM_CAPABILITIES_ALL
);
2857 r
= sd_lldp_set_filter_address(link
->lldp
, &link
->mac
);
2861 r
= sd_lldp_attach_event(link
->lldp
, NULL
, 0);
2865 r
= sd_lldp_set_callback(link
->lldp
, lldp_handler
, link
);
2869 r
= link_update_lldp(link
);
2874 if (link
->network
->mtu
> 0) {
2875 r
= link_set_mtu(link
, link
->network
->mtu
);
2880 if (link_has_carrier(link
) || link
->network
->configure_without_carrier
) {
2881 r
= link_acquire_conf(link
);
2886 return link_enter_join_netdev(link
);
2889 static int link_initialized_and_synced(sd_netlink
*rtnl
, sd_netlink_message
*m
,
2891 _cleanup_(link_unrefp
) Link
*link
= userdata
;
2896 assert(link
->ifname
);
2897 assert(link
->manager
);
2899 if (link
->state
!= LINK_STATE_PENDING
)
2902 log_link_debug(link
, "Link state is up-to-date");
2904 r
= link_new_bound_by_list(link
);
2908 r
= link_handle_bound_by_list(link
);
2912 if (!link
->network
) {
2913 r
= network_get(link
->manager
, link
->udev_device
, link
->ifname
,
2914 &link
->mac
, &network
);
2916 link_enter_unmanaged(link
);
2918 } else if (r
== 0 && network
->unmanaged
) {
2919 link_enter_unmanaged(link
);
2924 if (link
->flags
& IFF_LOOPBACK
) {
2925 if (network
->link_local
!= ADDRESS_FAMILY_NO
)
2926 log_link_debug(link
, "Ignoring link-local autoconfiguration for loopback link");
2928 if (network
->dhcp
!= ADDRESS_FAMILY_NO
)
2929 log_link_debug(link
, "Ignoring DHCP clients for loopback link");
2931 if (network
->dhcp_server
)
2932 log_link_debug(link
, "Ignoring DHCP server for loopback link");
2935 r
= network_apply(network
, link
);
2940 r
= link_new_bound_to_list(link
);
2944 r
= link_configure(link
);
2951 int link_initialized(Link
*link
, struct udev_device
*device
) {
2952 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
2956 assert(link
->manager
);
2957 assert(link
->manager
->rtnl
);
2960 if (link
->state
!= LINK_STATE_PENDING
)
2963 if (link
->udev_device
)
2966 log_link_debug(link
, "udev initialized link");
2968 link
->udev_device
= udev_device_ref(device
);
2970 /* udev has initialized the link, but we don't know if we have yet
2971 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2972 * when it returns we know that the pending NEWLINKs have already been
2973 * processed and that we are up-to-date */
2975 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_GETLINK
,
2980 r
= sd_netlink_call_async(link
->manager
->rtnl
, req
,
2981 link_initialized_and_synced
, link
, 0, NULL
);
2990 static int link_load(Link
*link
) {
2991 _cleanup_free_
char *network_file
= NULL
,
2994 *dhcp4_address
= NULL
,
2995 *ipv4ll_address
= NULL
;
2996 union in_addr_union address
;
2997 union in_addr_union route_dst
;
3003 r
= parse_env_file(NULL
, link
->state_file
, NEWLINE
,
3004 "NETWORK_FILE", &network_file
,
3005 "ADDRESSES", &addresses
,
3007 "DHCP4_ADDRESS", &dhcp4_address
,
3008 "IPV4LL_ADDRESS", &ipv4ll_address
,
3010 if (r
< 0 && r
!= -ENOENT
)
3011 return log_link_error_errno(link
, r
, "Failed to read %s: %m", link
->state_file
);
3018 suffix
= strrchr(network_file
, '.');
3020 log_link_debug(link
, "Failed to get network name from %s", network_file
);
3021 goto network_file_fail
;
3025 r
= network_get_by_name(link
->manager
, basename(network_file
), &network
);
3027 log_link_debug_errno(link
, r
, "Failed to get network %s: %m", basename(network_file
));
3028 goto network_file_fail
;
3031 r
= network_apply(network
, link
);
3033 return log_link_error_errno(link
, r
, "Failed to apply network %s: %m", basename(network_file
));
3042 _cleanup_free_
char *address_str
= NULL
;
3043 char *prefixlen_str
;
3045 unsigned char prefixlen
;
3047 r
= extract_first_word(&p
, &address_str
, NULL
, 0);
3049 log_link_debug_errno(link
, r
, "Failed to extract next address string: %m");
3055 prefixlen_str
= strchr(address_str
, '/');
3056 if (!prefixlen_str
) {
3057 log_link_debug(link
, "Failed to parse address and prefix length %s", address_str
);
3061 *prefixlen_str
++ = '\0';
3063 r
= sscanf(prefixlen_str
, "%hhu", &prefixlen
);
3065 log_link_error(link
, "Failed to parse prefixlen %s", prefixlen_str
);
3069 r
= in_addr_from_string_auto(address_str
, &family
, &address
);
3071 log_link_debug_errno(link
, r
, "Failed to parse address %s: %m", address_str
);
3075 r
= address_add(link
, family
, &address
, prefixlen
, NULL
);
3077 return log_link_error_errno(link
, r
, "Failed to add address: %m");
3086 _cleanup_free_
char *route_str
= NULL
;
3087 _cleanup_(sd_event_source_unrefp
) sd_event_source
*expire
= NULL
;
3089 char *prefixlen_str
;
3091 unsigned char prefixlen
, tos
, table
;
3094 r
= extract_first_word(&p
, &route_str
, NULL
, 0);
3096 log_link_debug_errno(link
, r
, "Failed to extract next route string: %m");
3102 prefixlen_str
= strchr(route_str
, '/');
3103 if (!prefixlen_str
) {
3104 log_link_debug(link
, "Failed to parse route %s", route_str
);
3108 *prefixlen_str
++ = '\0';
3110 r
= sscanf(prefixlen_str
, "%hhu/%hhu/%"SCNu32
"/%hhu/"USEC_FMT
, &prefixlen
, &tos
, &priority
, &table
, &lifetime
);
3112 log_link_debug(link
,
3113 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3118 r
= in_addr_from_string_auto(route_str
, &family
, &route_dst
);
3120 log_link_debug_errno(link
, r
, "Failed to parse route destination %s: %m", route_str
);
3124 r
= route_add(link
, family
, &route_dst
, prefixlen
, tos
, priority
, table
, &route
);
3126 return log_link_error_errno(link
, r
, "Failed to add route: %m");
3128 if (lifetime
!= USEC_INFINITY
&& !kernel_route_expiration_supported()) {
3129 r
= sd_event_add_time(link
->manager
->event
, &expire
, clock_boottime_or_monotonic(), lifetime
,
3130 0, route_expire_handler
, route
);
3132 log_link_warning_errno(link
, r
, "Could not arm route expiration handler: %m");
3135 route
->lifetime
= lifetime
;
3136 sd_event_source_unref(route
->expire
);
3137 route
->expire
= TAKE_PTR(expire
);
3141 if (dhcp4_address
) {
3142 r
= in_addr_from_string(AF_INET
, dhcp4_address
, &address
);
3144 log_link_debug_errno(link
, r
, "Failed to parse DHCPv4 address %s: %m", dhcp4_address
);
3145 goto dhcp4_address_fail
;
3148 r
= sd_dhcp_client_new(&link
->dhcp_client
, link
->network
? link
->network
->dhcp_anonymize
: 0);
3150 return log_link_error_errno(link
, r
, "Failed to create DHCPv4 client: %m");
3152 r
= sd_dhcp_client_set_request_address(link
->dhcp_client
, &address
.in
);
3154 return log_link_error_errno(link
, r
, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address
);
3159 if (ipv4ll_address
) {
3160 r
= in_addr_from_string(AF_INET
, ipv4ll_address
, &address
);
3162 log_link_debug_errno(link
, r
, "Failed to parse IPv4LL address %s: %m", ipv4ll_address
);
3163 goto ipv4ll_address_fail
;
3166 r
= sd_ipv4ll_new(&link
->ipv4ll
);
3168 return log_link_error_errno(link
, r
, "Failed to create IPv4LL client: %m");
3170 r
= sd_ipv4ll_set_address(link
->ipv4ll
, &address
.in
);
3172 return log_link_error_errno(link
, r
, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address
);
3175 ipv4ll_address_fail
:
3180 int link_add(Manager
*m
, sd_netlink_message
*message
, Link
**ret
) {
3182 _cleanup_(udev_device_unrefp
) struct udev_device
*device
= NULL
;
3183 char ifindex_str
[2 + DECIMAL_STR_MAX(int)];
3191 r
= link_new(m
, message
, ret
);
3197 log_link_debug(link
, "Link %d added", link
->ifindex
);
3199 r
= link_load(link
);
3203 if (detect_container() <= 0) {
3204 /* not in a container, udev will be around */
3205 sprintf(ifindex_str
, "n%d", link
->ifindex
);
3206 device
= udev_device_new_from_device_id(m
->udev
, ifindex_str
);
3208 r
= log_link_warning_errno(link
, errno
, "Could not find udev device: %m");
3212 if (udev_device_get_is_initialized(device
) <= 0) {
3214 log_link_debug(link
, "link pending udev initialization...");
3218 r
= link_initialized(link
, device
);
3222 /* we are calling a callback directly, so must take a ref */
3225 r
= link_initialized_and_synced(m
->rtnl
, NULL
, link
);
3232 link_enter_failed(link
);
3236 int link_ipv6ll_gained(Link
*link
, const struct in6_addr
*address
) {
3241 log_link_info(link
, "Gained IPv6LL");
3243 link
->ipv6ll_address
= *address
;
3244 link_check_ready(link
);
3246 if (!IN_SET(link
->state
, LINK_STATE_PENDING
, LINK_STATE_UNMANAGED
, LINK_STATE_FAILED
)) {
3247 r
= link_acquire_ipv6_conf(link
);
3249 link_enter_failed(link
);
3257 static int link_carrier_gained(Link
*link
) {
3262 if (!IN_SET(link
->state
, LINK_STATE_PENDING
, LINK_STATE_UNMANAGED
, LINK_STATE_FAILED
)) {
3263 r
= link_acquire_conf(link
);
3265 link_enter_failed(link
);
3269 r
= link_enter_set_addresses(link
);
3274 r
= link_handle_bound_by_list(link
);
3281 static int link_carrier_lost(Link
*link
) {
3286 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
3287 setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3288 configuration and stop the clients as well. */
3289 if (link
->setting_mtu
)
3292 r
= link_stop_clients(link
);
3294 link_enter_failed(link
);
3298 if (link_dhcp4_server_enabled(link
))
3299 (void) sd_dhcp_server_stop(link
->dhcp_server
);
3301 r
= link_drop_config(link
);
3305 if (!IN_SET(link
->state
, LINK_STATE_UNMANAGED
, LINK_STATE_PENDING
)) {
3306 log_link_debug(link
, "State is %s, dropping config", link_state_to_string(link
->state
));
3307 r
= link_drop_foreign_config(link
);
3312 r
= link_handle_bound_by_list(link
);
3319 int link_carrier_reset(Link
*link
) {
3324 if (link_has_carrier(link
)) {
3325 r
= link_carrier_lost(link
);
3329 r
= link_carrier_gained(link
);
3333 log_link_info(link
, "Reset carrier");
3339 int link_update(Link
*link
, sd_netlink_message
*m
) {
3340 struct ether_addr mac
;
3343 bool had_carrier
, carrier_gained
, carrier_lost
;
3347 assert(link
->ifname
);
3350 if (link
->state
== LINK_STATE_LINGER
) {
3352 log_link_info(link
, "Link readded");
3353 link_set_state(link
, LINK_STATE_ENSLAVING
);
3355 r
= link_new_carrier_maps(link
);
3360 r
= sd_netlink_message_read_string(m
, IFLA_IFNAME
, &ifname
);
3361 if (r
>= 0 && !streq(ifname
, link
->ifname
)) {
3362 log_link_info(link
, "Interface name change detected, %s has been renamed to %s.", link
->ifname
, ifname
);
3364 if (link
->state
== LINK_STATE_PENDING
) {
3365 r
= free_and_strdup(&link
->ifname
, ifname
);
3369 Manager
*manager
= link
->manager
;
3372 r
= link_add(manager
, m
, &link
);
3378 r
= sd_netlink_message_read_u32(m
, IFLA_MTU
, &mtu
);
3379 if (r
>= 0 && mtu
> 0) {
3381 if (link
->original_mtu
== 0) {
3382 link
->original_mtu
= mtu
;
3383 log_link_debug(link
, "Saved original MTU: %" PRIu32
, link
->original_mtu
);
3386 if (link
->dhcp_client
) {
3387 r
= sd_dhcp_client_set_mtu(link
->dhcp_client
,
3390 log_link_warning_errno(link
, r
, "Could not update MTU in DHCP client: %m");
3396 r
= sd_radv_set_mtu(link
->radv
, link
->mtu
);
3398 return log_link_warning_errno(link
, r
, "Could not set MTU for Router Advertisement: %m");
3402 /* The kernel may broadcast NEWLINK messages without the MAC address
3403 set, simply ignore them. */
3404 r
= sd_netlink_message_read_ether_addr(m
, IFLA_ADDRESS
, &mac
);
3406 if (memcmp(link
->mac
.ether_addr_octet
, mac
.ether_addr_octet
,
3409 memcpy(link
->mac
.ether_addr_octet
, mac
.ether_addr_octet
,
3412 log_link_debug(link
, "MAC address: "
3413 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3414 mac
.ether_addr_octet
[0],
3415 mac
.ether_addr_octet
[1],
3416 mac
.ether_addr_octet
[2],
3417 mac
.ether_addr_octet
[3],
3418 mac
.ether_addr_octet
[4],
3419 mac
.ether_addr_octet
[5]);
3422 r
= sd_ipv4ll_set_mac(link
->ipv4ll
, &link
->mac
);
3424 return log_link_warning_errno(link
, r
, "Could not update MAC address in IPv4LL client: %m");
3427 if (link
->dhcp_client
) {
3428 r
= sd_dhcp_client_set_mac(link
->dhcp_client
,
3429 (const uint8_t *) &link
->mac
,
3433 return log_link_warning_errno(link
, r
, "Could not update MAC address in DHCP client: %m");
3435 switch (link
->network
->dhcp_client_identifier
) {
3436 case DHCP_CLIENT_ID_DUID
: {
3437 const DUID
*duid
= link_duid(link
);
3439 r
= sd_dhcp_client_set_iaid_duid(link
->dhcp_client
,
3440 link
->network
->iaid
,
3442 duid
->raw_data_len
> 0 ? duid
->raw_data
: NULL
,
3443 duid
->raw_data_len
);
3445 return log_link_warning_errno(link
, r
, "Could not update DUID/IAID in DHCP client: %m");
3448 case DHCP_CLIENT_ID_DUID_ONLY
: {
3449 const DUID
*duid
= link_duid(link
);
3451 r
= sd_dhcp_client_set_duid(link
->dhcp_client
,
3453 duid
->raw_data_len
> 0 ? duid
->raw_data
: NULL
,
3454 duid
->raw_data_len
);
3456 return log_link_warning_errno(link
, r
, "Could not update DUID in DHCP client: %m");
3459 case DHCP_CLIENT_ID_MAC
:
3460 r
= sd_dhcp_client_set_client_id(link
->dhcp_client
,
3462 (const uint8_t *)&link
->mac
,
3465 return log_link_warning_errno(link
, r
, "Could not update MAC client id in DHCP client: %m");
3468 assert_not_reached("Unknown client identifier type.");
3472 if (link
->dhcp6_client
) {
3473 const DUID
* duid
= link_duid(link
);
3475 r
= sd_dhcp6_client_set_mac(link
->dhcp6_client
,
3476 (const uint8_t *) &link
->mac
,
3480 return log_link_warning_errno(link
, r
, "Could not update MAC address in DHCPv6 client: %m");
3482 r
= sd_dhcp6_client_set_iaid(link
->dhcp6_client
,
3483 link
->network
->iaid
);
3485 return log_link_warning_errno(link
, r
, "Could not update DHCPv6 IAID: %m");
3487 r
= sd_dhcp6_client_set_duid(link
->dhcp6_client
,
3489 duid
->raw_data_len
> 0 ? duid
->raw_data
: NULL
,
3490 duid
->raw_data_len
);
3492 return log_link_warning_errno(link
, r
, "Could not update DHCPv6 DUID: %m");
3496 r
= sd_radv_set_mac(link
->radv
, &link
->mac
);
3498 return log_link_warning_errno(link
, r
, "Could not update MAC for Router Advertisement: %m");
3502 r
= sd_ndisc_set_mac(link
->ndisc
, &link
->mac
);
3504 return log_link_warning_errno(link
, r
, "Could not update MAC for ndisc: %m");
3509 had_carrier
= link_has_carrier(link
);
3511 r
= link_update_flags(link
, m
);
3515 r
= link_update_lldp(link
);
3519 carrier_gained
= !had_carrier
&& link_has_carrier(link
);
3520 carrier_lost
= had_carrier
&& !link_has_carrier(link
);
3522 if (carrier_gained
) {
3523 log_link_info(link
, "Gained carrier");
3525 r
= link_carrier_gained(link
);
3528 } else if (carrier_lost
) {
3529 log_link_info(link
, "Lost carrier");
3531 r
= link_carrier_lost(link
);
3539 static void print_link_hashmap(FILE *f
, const char *prefix
, Hashmap
* h
) {
3547 if (hashmap_isempty(h
))
3551 HASHMAP_FOREACH(link
, h
, i
) {
3555 fprintf(f
, "%i", link
->ifindex
);
3562 int link_save(Link
*link
) {
3563 _cleanup_free_
char *temp_path
= NULL
;
3564 _cleanup_fclose_
FILE *f
= NULL
;
3565 const char *admin_state
, *oper_state
;
3572 assert(link
->state_file
);
3573 assert(link
->lease_file
);
3574 assert(link
->manager
);
3576 if (link
->state
== LINK_STATE_LINGER
) {
3577 unlink(link
->state_file
);
3581 link_lldp_save(link
);
3583 admin_state
= link_state_to_string(link
->state
);
3584 assert(admin_state
);
3586 oper_state
= link_operstate_to_string(link
->operstate
);
3589 r
= fopen_temporary(link
->state_file
, &f
, &temp_path
);
3593 (void) __fsetlocking(f
, FSETLOCKING_BYCALLER
);
3594 (void) fchmod(fileno(f
), 0644);
3597 "# This is private data. Do not parse.\n"
3600 admin_state
, oper_state
);
3602 if (link
->network
) {
3604 sd_dhcp6_lease
*dhcp6_lease
= NULL
;
3605 const char *dhcp_domainname
= NULL
;
3606 char **dhcp6_domains
= NULL
;
3607 char **dhcp_domains
= NULL
;
3610 fprintf(f
, "REQUIRED_FOR_ONLINE=%s\n",
3611 yes_no(link
->network
->required_for_online
));
3613 if (link
->dhcp6_client
) {
3614 r
= sd_dhcp6_client_get_lease(link
->dhcp6_client
, &dhcp6_lease
);
3615 if (r
< 0 && r
!= -ENOMSG
)
3616 log_link_debug(link
, "No DHCPv6 lease");
3619 fprintf(f
, "NETWORK_FILE=%s\n", link
->network
->filename
);
3624 for (j
= 0; j
< link
->network
->n_dns
; j
++) {
3625 _cleanup_free_
char *b
= NULL
;
3627 r
= in_addr_to_string(link
->network
->dns
[j
].family
,
3628 &link
->network
->dns
[j
].address
, &b
);
3630 log_debug_errno(r
, "Failed to format address, ignoring: %m");
3640 if (link
->network
->dhcp_use_dns
&&
3642 const struct in_addr
*addresses
;
3644 r
= sd_dhcp_lease_get_dns(link
->dhcp_lease
, &addresses
);
3648 serialize_in_addrs(f
, addresses
, r
);
3653 if (link
->network
->dhcp_use_dns
&& dhcp6_lease
) {
3654 struct in6_addr
*in6_addrs
;
3656 r
= sd_dhcp6_lease_get_dns(dhcp6_lease
, &in6_addrs
);
3660 serialize_in6_addrs(f
, in6_addrs
, r
);
3665 /* Make sure to flush out old entries before we use the NDISC data */
3668 if (link
->network
->ipv6_accept_ra_use_dns
&& link
->ndisc_rdnss
) {
3671 SET_FOREACH(dd
, link
->ndisc_rdnss
, i
) {
3675 serialize_in6_addrs(f
, &dd
->address
, 1);
3684 fputstrv(f
, link
->network
->ntp
, NULL
, &space
);
3686 if (link
->network
->dhcp_use_ntp
&&
3688 const struct in_addr
*addresses
;
3690 r
= sd_dhcp_lease_get_ntp(link
->dhcp_lease
, &addresses
);
3694 serialize_in_addrs(f
, addresses
, r
);
3699 if (link
->network
->dhcp_use_ntp
&& dhcp6_lease
) {
3700 struct in6_addr
*in6_addrs
;
3703 r
= sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease
,
3708 serialize_in6_addrs(f
, in6_addrs
, r
);
3712 r
= sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease
, &hosts
);
3714 fputstrv(f
, hosts
, NULL
, &space
);
3719 if (link
->network
->dhcp_use_domains
!= DHCP_USE_DOMAINS_NO
) {
3720 if (link
->dhcp_lease
) {
3721 (void) sd_dhcp_lease_get_domainname(link
->dhcp_lease
, &dhcp_domainname
);
3722 (void) sd_dhcp_lease_get_search_domains(link
->dhcp_lease
, &dhcp_domains
);
3725 (void) sd_dhcp6_lease_get_domains(dhcp6_lease
, &dhcp6_domains
);
3728 fputs("DOMAINS=", f
);
3730 fputstrv(f
, link
->network
->search_domains
, NULL
, &space
);
3732 if (link
->network
->dhcp_use_domains
== DHCP_USE_DOMAINS_YES
) {
3735 if (dhcp_domainname
)
3736 fputs_with_space(f
, dhcp_domainname
, NULL
, &space
);
3738 fputstrv(f
, dhcp_domains
, NULL
, &space
);
3740 fputstrv(f
, dhcp6_domains
, NULL
, &space
);
3742 SET_FOREACH(dd
, link
->ndisc_dnssl
, i
)
3743 fputs_with_space(f
, NDISC_DNSSL_DOMAIN(dd
), NULL
, &space
);
3748 fputs("ROUTE_DOMAINS=", f
);
3750 fputstrv(f
, link
->network
->route_domains
, NULL
, &space
);
3752 if (link
->network
->dhcp_use_domains
== DHCP_USE_DOMAINS_ROUTE
) {
3755 if (dhcp_domainname
)
3756 fputs_with_space(f
, dhcp_domainname
, NULL
, &space
);
3758 fputstrv(f
, dhcp_domains
, NULL
, &space
);
3760 fputstrv(f
, dhcp6_domains
, NULL
, &space
);
3762 SET_FOREACH(dd
, link
->ndisc_dnssl
, i
)
3763 fputs_with_space(f
, NDISC_DNSSL_DOMAIN(dd
), NULL
, &space
);
3768 fprintf(f
, "LLMNR=%s\n",
3769 resolve_support_to_string(link
->network
->llmnr
));
3770 fprintf(f
, "MDNS=%s\n",
3771 resolve_support_to_string(link
->network
->mdns
));
3773 if (link
->network
->dns_over_tls_mode
!= _DNS_OVER_TLS_MODE_INVALID
)
3774 fprintf(f
, "DNS_OVER_TLS=%s\n",
3775 dns_over_tls_mode_to_string(link
->network
->dns_over_tls_mode
));
3777 if (link
->network
->dnssec_mode
!= _DNSSEC_MODE_INVALID
)
3778 fprintf(f
, "DNSSEC=%s\n",
3779 dnssec_mode_to_string(link
->network
->dnssec_mode
));
3781 if (!set_isempty(link
->network
->dnssec_negative_trust_anchors
)) {
3784 fputs("DNSSEC_NTA=", f
);
3786 SET_FOREACH(n
, link
->network
->dnssec_negative_trust_anchors
, i
)
3787 fputs_with_space(f
, n
, NULL
, &space
);
3791 fputs("ADDRESSES=", f
);
3793 SET_FOREACH(a
, link
->addresses
, i
) {
3794 _cleanup_free_
char *address_str
= NULL
;
3796 r
= in_addr_to_string(a
->family
, &a
->in_addr
, &address_str
);
3800 fprintf(f
, "%s%s/%u", space
? " " : "", address_str
, a
->prefixlen
);
3805 fputs("ROUTES=", f
);
3807 SET_FOREACH(route
, link
->routes
, i
) {
3808 _cleanup_free_
char *route_str
= NULL
;
3810 r
= in_addr_to_string(route
->family
, &route
->dst
, &route_str
);
3814 fprintf(f
, "%s%s/%hhu/%hhu/%"PRIu32
"/%"PRIu32
"/"USEC_FMT
,
3815 space
? " " : "", route_str
,
3816 route
->dst_prefixlen
, route
->tos
, route
->priority
, route
->table
, route
->lifetime
);
3823 print_link_hashmap(f
, "CARRIER_BOUND_TO=", link
->bound_to_links
);
3824 print_link_hashmap(f
, "CARRIER_BOUND_BY=", link
->bound_by_links
);
3826 if (link
->dhcp_lease
) {
3827 struct in_addr address
;
3828 const char *tz
= NULL
;
3830 assert(link
->network
);
3832 r
= sd_dhcp_lease_get_timezone(link
->dhcp_lease
, &tz
);
3834 fprintf(f
, "TIMEZONE=%s\n", tz
);
3836 r
= sd_dhcp_lease_get_address(link
->dhcp_lease
, &address
);
3838 fputs("DHCP4_ADDRESS=", f
);
3839 serialize_in_addrs(f
, &address
, 1);
3843 r
= dhcp_lease_save(link
->dhcp_lease
, link
->lease_file
);
3851 unlink(link
->lease_file
);
3854 struct in_addr address
;
3856 r
= sd_ipv4ll_get_address(link
->ipv4ll
, &address
);
3858 fputs("IPV4LL_ADDRESS=", f
);
3859 serialize_in_addrs(f
, &address
, 1);
3864 r
= fflush_and_check(f
);
3868 if (rename(temp_path
, link
->state_file
) < 0) {
3876 (void) unlink(link
->state_file
);
3878 (void) unlink(temp_path
);
3880 return log_link_error_errno(link
, r
, "Failed to save link data to %s: %m", link
->state_file
);
3883 /* The serialized state in /run is no longer up-to-date. */
3884 void link_dirty(Link
*link
) {
3889 /* mark manager dirty as link is dirty */
3890 manager_dirty(link
->manager
);
3892 r
= set_ensure_allocated(&link
->manager
->dirty_links
, NULL
);
3894 /* allocation errors are ignored */
3897 r
= set_put(link
->manager
->dirty_links
, link
);
3899 /* don't take another ref if the link was already dirty */
3905 /* The serialized state in /run is up-to-date */
3906 void link_clean(Link
*link
) {
3908 assert(link
->manager
);
3910 set_remove(link
->manager
->dirty_links
, link
);
3914 static const char* const link_state_table
[_LINK_STATE_MAX
] = {
3915 [LINK_STATE_PENDING
] = "pending",
3916 [LINK_STATE_ENSLAVING
] = "configuring",
3917 [LINK_STATE_SETTING_ADDRESSES
] = "configuring",
3918 [LINK_STATE_SETTING_ROUTES
] = "configuring",
3919 [LINK_STATE_CONFIGURED
] = "configured",
3920 [LINK_STATE_UNMANAGED
] = "unmanaged",
3921 [LINK_STATE_FAILED
] = "failed",
3922 [LINK_STATE_LINGER
] = "linger",
3925 DEFINE_STRING_TABLE_LOOKUP(link_state
, LinkState
);
3927 static const char* const link_operstate_table
[_LINK_OPERSTATE_MAX
] = {
3928 [LINK_OPERSTATE_OFF
] = "off",
3929 [LINK_OPERSTATE_NO_CARRIER
] = "no-carrier",
3930 [LINK_OPERSTATE_DORMANT
] = "dormant",
3931 [LINK_OPERSTATE_CARRIER
] = "carrier",
3932 [LINK_OPERSTATE_DEGRADED
] = "degraded",
3933 [LINK_OPERSTATE_ROUTABLE
] = "routable",
3936 DEFINE_STRING_TABLE_LOOKUP(link_operstate
, LinkOperationalState
);