1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 #include <netinet/ether.h>
5 #include <linux/can/netlink.h>
9 #include "alloc-util.h"
11 #include "dhcp-identifier.h"
12 #include "dhcp-lease-internal.h"
15 #include "netlink-util.h"
16 #include "network-internal.h"
17 #include "networkd-ipv6-proxy-ndp.h"
18 #include "networkd-lldp-tx.h"
19 #include "networkd-manager.h"
20 #include "networkd-ndisc.h"
21 #include "networkd-radv.h"
22 #include "networkd-routing-policy-rule.h"
24 #include "socket-util.h"
25 #include "stdio-util.h"
26 #include "string-table.h"
31 DUID
* link_get_duid(Link
*link
) {
32 if (link
->network
->duid
.type
!= _DUID_TYPE_INVALID
)
33 return &link
->network
->duid
;
35 return &link
->manager
->duid
;
38 static bool link_dhcp6_enabled(Link
*link
) {
41 if (!socket_ipv6_is_supported())
44 if (link
->flags
& IFF_LOOPBACK
)
50 return link
->network
->dhcp
& ADDRESS_FAMILY_IPV6
;
53 static bool link_dhcp4_enabled(Link
*link
) {
56 if (link
->flags
& IFF_LOOPBACK
)
62 return link
->network
->dhcp
& ADDRESS_FAMILY_IPV4
;
65 static bool link_dhcp4_server_enabled(Link
*link
) {
68 if (link
->flags
& IFF_LOOPBACK
)
74 return link
->network
->dhcp_server
;
77 static bool link_ipv4ll_enabled(Link
*link
) {
80 if (link
->flags
& IFF_LOOPBACK
)
86 if (streq_ptr(link
->kind
, "wireguard"))
89 return link
->network
->link_local
& ADDRESS_FAMILY_IPV4
;
92 static bool link_ipv6ll_enabled(Link
*link
) {
95 if (!socket_ipv6_is_supported())
98 if (link
->flags
& IFF_LOOPBACK
)
104 if (streq_ptr(link
->kind
, "wireguard"))
107 return link
->network
->link_local
& ADDRESS_FAMILY_IPV6
;
110 static bool link_ipv6_enabled(Link
*link
) {
113 if (!socket_ipv6_is_supported())
116 if (link
->network
->bridge
)
119 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
120 return link_ipv6ll_enabled(link
) || network_has_static_ipv6_addresses(link
->network
);
123 static bool link_radv_enabled(Link
*link
) {
126 if (!link_ipv6ll_enabled(link
))
129 return link
->network
->router_prefix_delegation
!= RADV_PREFIX_DELEGATION_NONE
;
132 static bool link_lldp_rx_enabled(Link
*link
) {
135 if (link
->flags
& IFF_LOOPBACK
)
138 if (link
->iftype
!= ARPHRD_ETHER
)
144 /* LLDP should be handled on bridge slaves as those have a direct
145 * connection to their peers not on the bridge master. Linux doesn't
146 * even (by default) forward lldp packets to the bridge master.*/
147 if (streq_ptr("bridge", link
->kind
))
150 return link
->network
->lldp_mode
!= LLDP_MODE_NO
;
153 static bool link_lldp_emit_enabled(Link
*link
) {
156 if (link
->flags
& IFF_LOOPBACK
)
159 if (link
->iftype
!= ARPHRD_ETHER
)
165 return link
->network
->lldp_emit
!= LLDP_EMIT_NO
;
168 static bool link_ipv4_forward_enabled(Link
*link
) {
171 if (link
->flags
& IFF_LOOPBACK
)
177 if (link
->network
->ip_forward
== _ADDRESS_FAMILY_BOOLEAN_INVALID
)
180 return link
->network
->ip_forward
& ADDRESS_FAMILY_IPV4
;
183 static bool link_ipv6_forward_enabled(Link
*link
) {
186 if (!socket_ipv6_is_supported())
189 if (link
->flags
& IFF_LOOPBACK
)
195 if (link
->network
->ip_forward
== _ADDRESS_FAMILY_BOOLEAN_INVALID
)
198 return link
->network
->ip_forward
& ADDRESS_FAMILY_IPV6
;
201 static bool link_proxy_arp_enabled(Link
*link
) {
204 if (link
->flags
& IFF_LOOPBACK
)
210 if (link
->network
->proxy_arp
< 0)
216 static bool link_ipv6_accept_ra_enabled(Link
*link
) {
219 if (!socket_ipv6_is_supported())
222 if (link
->flags
& IFF_LOOPBACK
)
228 if (!link_ipv6ll_enabled(link
))
231 /* If unset use system default (enabled if local forwarding is disabled.
232 * disabled if local forwarding is enabled).
233 * If set, ignore or enforce RA independent of local forwarding state.
235 if (link
->network
->ipv6_accept_ra
< 0)
236 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
237 return !link_ipv6_forward_enabled(link
);
238 else if (link
->network
->ipv6_accept_ra
> 0)
239 /* accept RA even if ip_forward is enabled */
246 static IPv6PrivacyExtensions
link_ipv6_privacy_extensions(Link
*link
) {
249 if (!socket_ipv6_is_supported())
250 return _IPV6_PRIVACY_EXTENSIONS_INVALID
;
252 if (link
->flags
& IFF_LOOPBACK
)
253 return _IPV6_PRIVACY_EXTENSIONS_INVALID
;
256 return _IPV6_PRIVACY_EXTENSIONS_INVALID
;
258 return link
->network
->ipv6_privacy_extensions
;
261 static int link_enable_ipv6(Link
*link
) {
262 const char *p
= NULL
;
266 if (link
->flags
& IFF_LOOPBACK
)
269 disabled
= !link_ipv6_enabled(link
);
271 p
= strjoina("/proc/sys/net/ipv6/conf/", link
->ifname
, "/disable_ipv6");
273 r
= write_string_file(p
, one_zero(disabled
), WRITE_STRING_FILE_VERIFY_ON_FAILURE
);
275 log_link_warning_errno(link
, r
, "Cannot %s IPv6 for interface %s: %m",
276 enable_disable(!disabled
), link
->ifname
);
278 log_link_info(link
, "IPv6 successfully %sd", enable_disable(!disabled
));
283 void link_update_operstate(Link
*link
) {
284 LinkOperationalState operstate
;
287 if (link
->kernel_operstate
== IF_OPER_DORMANT
)
288 operstate
= LINK_OPERSTATE_DORMANT
;
289 else if (link_has_carrier(link
)) {
291 uint8_t scope
= RT_SCOPE_NOWHERE
;
294 /* if we have carrier, check what addresses we have */
295 SET_FOREACH(address
, link
->addresses
, i
) {
296 if (!address_is_ready(address
))
299 if (address
->scope
< scope
)
300 scope
= address
->scope
;
303 /* for operstate we also take foreign addresses into account */
304 SET_FOREACH(address
, link
->addresses_foreign
, i
) {
305 if (!address_is_ready(address
))
308 if (address
->scope
< scope
)
309 scope
= address
->scope
;
312 if (scope
< RT_SCOPE_SITE
)
313 /* universally accessible addresses found */
314 operstate
= LINK_OPERSTATE_ROUTABLE
;
315 else if (scope
< RT_SCOPE_HOST
)
316 /* only link or site local addresses found */
317 operstate
= LINK_OPERSTATE_DEGRADED
;
319 /* no useful addresses found */
320 operstate
= LINK_OPERSTATE_CARRIER
;
321 } else if (link
->flags
& IFF_UP
)
322 operstate
= LINK_OPERSTATE_NO_CARRIER
;
324 operstate
= LINK_OPERSTATE_OFF
;
326 if (link
->operstate
!= operstate
) {
327 link
->operstate
= operstate
;
328 link_send_changed(link
, "OperationalState", NULL
);
333 #define FLAG_STRING(string, flag, old, new) \
334 (((old ^ new) & flag) \
335 ? ((old & flag) ? (" -" string) : (" +" string)) \
338 static int link_update_flags(Link
*link
, sd_netlink_message
*m
) {
339 unsigned flags
, unknown_flags_added
, unknown_flags_removed
, unknown_flags
;
345 r
= sd_rtnl_message_link_get_flags(m
, &flags
);
347 return log_link_warning_errno(link
, r
, "Could not get link flags: %m");
349 r
= sd_netlink_message_read_u8(m
, IFLA_OPERSTATE
, &operstate
);
351 /* if we got a message without operstate, take it to mean
352 the state was unchanged */
353 operstate
= link
->kernel_operstate
;
355 if ((link
->flags
== flags
) && (link
->kernel_operstate
== operstate
))
358 if (link
->flags
!= flags
) {
359 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",
360 FLAG_STRING("LOOPBACK", IFF_LOOPBACK
, link
->flags
, flags
),
361 FLAG_STRING("MASTER", IFF_MASTER
, link
->flags
, flags
),
362 FLAG_STRING("SLAVE", IFF_SLAVE
, link
->flags
, flags
),
363 FLAG_STRING("UP", IFF_UP
, link
->flags
, flags
),
364 FLAG_STRING("DORMANT", IFF_DORMANT
, link
->flags
, flags
),
365 FLAG_STRING("LOWER_UP", IFF_LOWER_UP
, link
->flags
, flags
),
366 FLAG_STRING("RUNNING", IFF_RUNNING
, link
->flags
, flags
),
367 FLAG_STRING("MULTICAST", IFF_MULTICAST
, link
->flags
, flags
),
368 FLAG_STRING("BROADCAST", IFF_BROADCAST
, link
->flags
, flags
),
369 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT
, link
->flags
, flags
),
370 FLAG_STRING("PROMISC", IFF_PROMISC
, link
->flags
, flags
),
371 FLAG_STRING("ALLMULTI", IFF_ALLMULTI
, link
->flags
, flags
),
372 FLAG_STRING("PORTSEL", IFF_PORTSEL
, link
->flags
, flags
),
373 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA
, link
->flags
, flags
),
374 FLAG_STRING("DYNAMIC", IFF_DYNAMIC
, link
->flags
, flags
),
375 FLAG_STRING("NOARP", IFF_NOARP
, link
->flags
, flags
),
376 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS
, link
->flags
, flags
),
377 FLAG_STRING("DEBUG", IFF_DEBUG
, link
->flags
, flags
),
378 FLAG_STRING("ECHO", IFF_ECHO
, link
->flags
, flags
));
380 unknown_flags
= ~(IFF_LOOPBACK
| IFF_MASTER
| IFF_SLAVE
| IFF_UP
|
381 IFF_DORMANT
| IFF_LOWER_UP
| IFF_RUNNING
|
382 IFF_MULTICAST
| IFF_BROADCAST
| IFF_POINTOPOINT
|
383 IFF_PROMISC
| IFF_ALLMULTI
| IFF_PORTSEL
|
384 IFF_AUTOMEDIA
| IFF_DYNAMIC
| IFF_NOARP
|
385 IFF_NOTRAILERS
| IFF_DEBUG
| IFF_ECHO
);
386 unknown_flags_added
= ((link
->flags
^ flags
) & flags
& unknown_flags
);
387 unknown_flags_removed
= ((link
->flags
^ flags
) & link
->flags
& unknown_flags
);
389 /* link flags are currently at most 18 bits, let's align to
391 if (unknown_flags_added
)
393 "Unknown link flags gained: %#.5x (ignoring)",
394 unknown_flags_added
);
396 if (unknown_flags_removed
)
398 "Unknown link flags lost: %#.5x (ignoring)",
399 unknown_flags_removed
);
403 link
->kernel_operstate
= operstate
;
405 link_update_operstate(link
);
410 DEFINE_TRIVIAL_CLEANUP_FUNC(Link
*, link_unref
);
412 static int link_new(Manager
*manager
, sd_netlink_message
*message
, Link
**ret
) {
413 _cleanup_(link_unrefp
) Link
*link
= NULL
;
415 const char *ifname
, *kind
= NULL
;
417 unsigned short iftype
;
423 /* check for link kind */
424 r
= sd_netlink_message_enter_container(message
, IFLA_LINKINFO
);
426 (void) sd_netlink_message_read_string(message
, IFLA_INFO_KIND
, &kind
);
427 r
= sd_netlink_message_exit_container(message
);
432 r
= sd_netlink_message_get_type(message
, &type
);
435 else if (type
!= RTM_NEWLINK
)
438 r
= sd_rtnl_message_link_get_ifindex(message
, &ifindex
);
441 else if (ifindex
<= 0)
444 r
= sd_rtnl_message_link_get_type(message
, &iftype
);
448 r
= sd_netlink_message_read_string(message
, IFLA_IFNAME
, &ifname
);
452 link
= new0(Link
, 1);
457 link
->manager
= manager
;
458 link
->state
= LINK_STATE_PENDING
;
459 link
->rtnl_extended_attrs
= true;
460 link
->ifindex
= ifindex
;
461 link
->iftype
= iftype
;
462 link
->ifname
= strdup(ifname
);
467 link
->kind
= strdup(kind
);
472 r
= sd_netlink_message_read_ether_addr(message
, IFLA_ADDRESS
, &link
->mac
);
474 log_link_debug_errno(link
, r
, "MAC address not found for new device, continuing without");
476 if (asprintf(&link
->state_file
, "/run/systemd/netif/links/%d", link
->ifindex
) < 0)
479 if (asprintf(&link
->lease_file
, "/run/systemd/netif/leases/%d", link
->ifindex
) < 0)
482 if (asprintf(&link
->lldp_file
, "/run/systemd/netif/lldp/%d", link
->ifindex
) < 0)
485 r
= hashmap_ensure_allocated(&manager
->links
, NULL
);
489 r
= hashmap_put(manager
->links
, INT_TO_PTR(link
->ifindex
), link
);
493 r
= link_update_flags(link
, message
);
497 *ret
= TAKE_PTR(link
);
502 static Link
*link_free(Link
*link
) {
510 while ((route
= set_first(link
->routes
)))
513 while ((route
= set_first(link
->routes_foreign
)))
516 link
->routes
= set_free(link
->routes
);
517 link
->routes_foreign
= set_free(link
->routes_foreign
);
519 while ((address
= set_first(link
->addresses
)))
520 address_free(address
);
522 while ((address
= set_first(link
->addresses_foreign
)))
523 address_free(address
);
525 link
->addresses
= set_free(link
->addresses
);
526 link
->addresses_foreign
= set_free(link
->addresses_foreign
);
528 while ((address
= link
->pool_addresses
)) {
529 LIST_REMOVE(addresses
, link
->pool_addresses
, address
);
530 address_free(address
);
533 sd_dhcp_server_unref(link
->dhcp_server
);
534 sd_dhcp_client_unref(link
->dhcp_client
);
535 sd_dhcp_lease_unref(link
->dhcp_lease
);
537 link_lldp_emit_stop(link
);
539 free(link
->lease_file
);
541 sd_lldp_unref(link
->lldp
);
542 free(link
->lldp_file
);
546 sd_ipv4ll_unref(link
->ipv4ll
);
547 sd_dhcp6_client_unref(link
->dhcp6_client
);
548 sd_ndisc_unref(link
->ndisc
);
549 sd_radv_unref(link
->radv
);
552 hashmap_remove(link
->manager
->links
, INT_TO_PTR(link
->ifindex
));
553 set_remove(link
->manager
->links_requesting_uuid
, link
);
561 (void) unlink(link
->state_file
);
562 free(link
->state_file
);
564 sd_device_unref(link
->sd_device
);
566 HASHMAP_FOREACH (carrier
, link
->bound_to_links
, i
)
567 hashmap_remove(link
->bound_to_links
, INT_TO_PTR(carrier
->ifindex
));
568 hashmap_free(link
->bound_to_links
);
570 HASHMAP_FOREACH (carrier
, link
->bound_by_links
, i
)
571 hashmap_remove(link
->bound_by_links
, INT_TO_PTR(carrier
->ifindex
));
572 hashmap_free(link
->bound_by_links
);
577 DEFINE_TRIVIAL_REF_UNREF_FUNC(Link
, link
, link_free
);
579 void link_netlink_destroy_callback(void *userdata
) {
580 Link
*link
= userdata
;
587 int link_get(Manager
*m
, int ifindex
, Link
**ret
) {
594 link
= hashmap_get(m
->links
, INT_TO_PTR(ifindex
));
603 static void link_set_state(Link
*link
, LinkState state
) {
606 if (link
->state
== state
)
611 link_send_changed(link
, "AdministrativeState", NULL
);
614 static void link_enter_unmanaged(Link
*link
) {
617 log_link_debug(link
, "Unmanaged");
619 link_set_state(link
, LINK_STATE_UNMANAGED
);
624 static int link_stop_clients(Link
*link
) {
628 assert(link
->manager
);
629 assert(link
->manager
->event
);
631 if (link
->dhcp_client
) {
632 k
= sd_dhcp_client_stop(link
->dhcp_client
);
634 r
= log_link_warning_errno(link
, k
, "Could not stop DHCPv4 client: %m");
638 k
= sd_ipv4ll_stop(link
->ipv4ll
);
640 r
= log_link_warning_errno(link
, k
, "Could not stop IPv4 link-local: %m");
643 if (link
->dhcp6_client
) {
644 k
= sd_dhcp6_client_stop(link
->dhcp6_client
);
646 r
= log_link_warning_errno(link
, k
, "Could not stop DHCPv6 client: %m");
650 k
= sd_ndisc_stop(link
->ndisc
);
652 r
= log_link_warning_errno(link
, k
, "Could not stop IPv6 Router Discovery: %m");
656 k
= sd_radv_stop(link
->radv
);
658 r
= log_link_warning_errno(link
, k
, "Could not stop IPv6 Router Advertisement: %m");
661 link_lldp_emit_stop(link
);
665 void link_enter_failed(Link
*link
) {
668 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
671 log_link_warning(link
, "Failed");
673 link_set_state(link
, LINK_STATE_FAILED
);
675 link_stop_clients(link
);
680 static Address
* link_find_dhcp_server_address(Link
*link
) {
684 assert(link
->network
);
686 /* The first statically configured address if there is any */
687 LIST_FOREACH(addresses
, address
, link
->network
->static_addresses
) {
689 if (address
->family
!= AF_INET
)
692 if (in_addr_is_null(address
->family
, &address
->in_addr
))
698 /* If that didn't work, find a suitable address we got from the pool */
699 LIST_FOREACH(addresses
, address
, link
->pool_addresses
) {
700 if (address
->family
!= AF_INET
)
709 static void link_enter_configured(Link
*link
) {
711 assert(link
->network
);
713 if (link
->state
!= LINK_STATE_SETTING_ROUTES
)
716 log_link_info(link
, "Configured");
718 link_set_state(link
, LINK_STATE_CONFIGURED
);
723 void link_check_ready(Link
*link
) {
729 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
735 if (!link
->static_routes_configured
)
738 if (!link
->routing_policy_rules_configured
)
741 if (link_ipv4ll_enabled(link
))
742 if (!link
->ipv4ll_address
||
746 if (!link
->network
->bridge
) {
748 if (link_ipv6ll_enabled(link
))
749 if (in_addr_is_null(AF_INET6
, (const union in_addr_union
*) &link
->ipv6ll_address
) > 0)
752 if ((link_dhcp4_enabled(link
) && !link_dhcp6_enabled(link
) &&
753 !link
->dhcp4_configured
) ||
754 (link_dhcp6_enabled(link
) && !link_dhcp4_enabled(link
) &&
755 !link
->dhcp6_configured
) ||
756 (link_dhcp4_enabled(link
) && link_dhcp6_enabled(link
) &&
757 !link
->dhcp4_configured
&& !link
->dhcp6_configured
))
760 if (link_ipv6_accept_ra_enabled(link
) && !link
->ndisc_configured
)
764 SET_FOREACH(a
, link
->addresses
, i
)
765 if (!address_is_ready(a
))
768 if (link
->state
!= LINK_STATE_CONFIGURED
)
769 link_enter_configured(link
);
774 static int link_set_routing_policy_rule(Link
*link
) {
775 RoutingPolicyRule
*rule
, *rrule
= NULL
;
779 assert(link
->network
);
781 LIST_FOREACH(rules
, rule
, link
->network
->rules
) {
782 r
= routing_policy_rule_get(link
->manager
, rule
->family
, &rule
->from
, rule
->from_prefixlen
, &rule
->to
,
783 rule
->to_prefixlen
, rule
->tos
, rule
->fwmark
, rule
->table
, rule
->iif
, rule
->oif
, &rrule
);
785 (void) routing_policy_rule_make_local(link
->manager
, rrule
);
789 r
= routing_policy_rule_configure(rule
, link
, link_routing_policy_rule_handler
, false);
791 log_link_warning_errno(link
, r
, "Could not set routing policy rules: %m");
792 link_enter_failed(link
);
796 link
->routing_policy_rule_messages
++;
799 routing_policy_rule_purge(link
->manager
, link
);
800 if (link
->routing_policy_rule_messages
== 0) {
801 link
->routing_policy_rules_configured
= true;
802 link_check_ready(link
);
804 log_link_debug(link
, "Setting routing policy rules");
809 static int route_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
810 Link
*link
= userdata
;
814 assert(link
->route_messages
> 0);
815 assert(IN_SET(link
->state
, LINK_STATE_SETTING_ADDRESSES
,
816 LINK_STATE_SETTING_ROUTES
, LINK_STATE_FAILED
,
819 link
->route_messages
--;
821 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
824 r
= sd_netlink_message_get_errno(m
);
825 if (r
< 0 && r
!= -EEXIST
)
826 log_link_warning_errno(link
, r
, "Could not set route: %m");
828 if (link
->route_messages
== 0) {
829 log_link_debug(link
, "Routes set");
830 link
->static_routes_configured
= true;
831 link_check_ready(link
);
837 static int link_enter_set_routes(Link
*link
) {
842 assert(link
->network
);
843 assert(link
->state
== LINK_STATE_SETTING_ADDRESSES
);
845 (void) link_set_routing_policy_rule(link
);
847 link_set_state(link
, LINK_STATE_SETTING_ROUTES
);
849 LIST_FOREACH(routes
, rt
, link
->network
->static_routes
) {
850 r
= route_configure(rt
, link
, route_handler
);
852 log_link_warning_errno(link
, r
, "Could not set routes: %m");
853 link_enter_failed(link
);
857 link
->route_messages
++;
860 if (link
->route_messages
== 0) {
861 link
->static_routes_configured
= true;
862 link_check_ready(link
);
864 log_link_debug(link
, "Setting routes");
869 int link_route_remove_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
870 Link
*link
= userdata
;
875 assert(link
->ifname
);
877 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
880 r
= sd_netlink_message_get_errno(m
);
881 if (r
< 0 && r
!= -ESRCH
)
882 log_link_warning_errno(link
, r
, "Could not drop route: %m");
887 static int address_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
888 Link
*link
= userdata
;
894 assert(link
->ifname
);
895 assert(link
->address_messages
> 0);
896 assert(IN_SET(link
->state
, LINK_STATE_SETTING_ADDRESSES
,
897 LINK_STATE_FAILED
, LINK_STATE_LINGER
));
899 link
->address_messages
--;
901 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
904 r
= sd_netlink_message_get_errno(m
);
905 if (r
< 0 && r
!= -EEXIST
)
906 log_link_warning_errno(link
, r
, "could not set address: %m");
908 manager_rtnl_process_address(rtnl
, m
, link
->manager
);
910 if (link
->address_messages
== 0) {
911 log_link_debug(link
, "Addresses set");
912 link_enter_set_routes(link
);
918 static int address_label_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
919 Link
*link
= userdata
;
925 assert(link
->ifname
);
926 assert(link
->address_label_messages
> 0);
928 link
->address_label_messages
--;
930 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
933 r
= sd_netlink_message_get_errno(m
);
934 if (r
< 0 && r
!= -EEXIST
)
935 log_link_warning_errno(link
, r
, "could not set address label: %m");
937 manager_rtnl_process_address(rtnl
, m
, link
->manager
);
939 if (link
->address_label_messages
== 0)
940 log_link_debug(link
, "Addresses label set");
945 static int link_push_uplink_dns_to_dhcp_server(Link
*link
, sd_dhcp_server
*s
) {
946 _cleanup_free_
struct in_addr
*addresses
= NULL
;
947 size_t n_addresses
= 0, n_allocated
= 0;
950 log_debug("Copying DNS server information from %s", link
->ifname
);
955 for (i
= 0; i
< link
->network
->n_dns
; i
++) {
958 /* Only look for IPv4 addresses */
959 if (link
->network
->dns
[i
].family
!= AF_INET
)
962 ia
= link
->network
->dns
[i
].address
.in
;
964 /* Never propagate obviously borked data */
965 if (in4_addr_is_null(&ia
) || in4_addr_is_localhost(&ia
))
968 if (!GREEDY_REALLOC(addresses
, n_allocated
, n_addresses
+ 1))
971 addresses
[n_addresses
++] = ia
;
974 if (link
->network
->dhcp_use_dns
&& link
->dhcp_lease
) {
975 const struct in_addr
*da
= NULL
;
978 n
= sd_dhcp_lease_get_dns(link
->dhcp_lease
, &da
);
981 if (!GREEDY_REALLOC(addresses
, n_allocated
, n_addresses
+ n
))
984 memcpy(addresses
+ n_addresses
, da
, n
* sizeof(struct in_addr
));
989 if (n_addresses
<= 0)
992 return sd_dhcp_server_set_dns(s
, addresses
, n_addresses
);
995 static int link_push_uplink_ntp_to_dhcp_server(Link
*link
, sd_dhcp_server
*s
) {
996 _cleanup_free_
struct in_addr
*addresses
= NULL
;
997 size_t n_addresses
= 0, n_allocated
= 0;
1003 log_debug("Copying NTP server information from %s", link
->ifname
);
1005 STRV_FOREACH(a
, link
->network
->ntp
) {
1008 /* Only look for IPv4 addresses */
1009 if (inet_pton(AF_INET
, *a
, &ia
) <= 0)
1012 /* Never propagate obviously borked data */
1013 if (in4_addr_is_null(&ia
) || in4_addr_is_localhost(&ia
))
1016 if (!GREEDY_REALLOC(addresses
, n_allocated
, n_addresses
+ 1))
1019 addresses
[n_addresses
++] = ia
;
1022 if (link
->network
->dhcp_use_ntp
&& link
->dhcp_lease
) {
1023 const struct in_addr
*da
= NULL
;
1026 n
= sd_dhcp_lease_get_ntp(link
->dhcp_lease
, &da
);
1029 if (!GREEDY_REALLOC(addresses
, n_allocated
, n_addresses
+ n
))
1032 memcpy(addresses
+ n_addresses
, da
, n
* sizeof(struct in_addr
));
1037 if (n_addresses
<= 0)
1040 return sd_dhcp_server_set_ntp(s
, addresses
, n_addresses
);
1043 static int link_set_bridge_fdb(Link
*link
) {
1044 FdbEntry
*fdb_entry
;
1047 LIST_FOREACH(static_fdb_entries
, fdb_entry
, link
->network
->static_fdb_entries
) {
1048 r
= fdb_entry_configure(link
, fdb_entry
);
1050 return log_link_error_errno(link
, r
, "Failed to add MAC entry to static MAC table: %m");
1056 static int link_enter_set_addresses(Link
*link
) {
1057 AddressLabel
*label
;
1062 assert(link
->network
);
1063 assert(link
->state
!= _LINK_STATE_INVALID
);
1065 r
= link_set_bridge_fdb(link
);
1069 link_set_state(link
, LINK_STATE_SETTING_ADDRESSES
);
1071 LIST_FOREACH(addresses
, ad
, link
->network
->static_addresses
) {
1072 r
= address_configure(ad
, link
, address_handler
, false);
1074 log_link_warning_errno(link
, r
, "Could not set addresses: %m");
1075 link_enter_failed(link
);
1079 link
->address_messages
++;
1082 LIST_FOREACH(labels
, label
, link
->network
->address_labels
) {
1083 r
= address_label_configure(label
, link
, address_label_handler
, false);
1085 log_link_warning_errno(link
, r
, "Could not set address label: %m");
1086 link_enter_failed(link
);
1090 link
->address_label_messages
++;
1093 /* now that we can figure out a default address for the dhcp server,
1095 if (link_dhcp4_server_enabled(link
) && (link
->flags
& IFF_UP
)) {
1097 Link
*uplink
= NULL
;
1098 bool acquired_uplink
= false;
1100 address
= link_find_dhcp_server_address(link
);
1102 log_link_warning(link
, "Failed to find suitable address for DHCPv4 server instance.");
1103 link_enter_failed(link
);
1107 /* use the server address' subnet as the pool */
1108 r
= sd_dhcp_server_configure_pool(link
->dhcp_server
, &address
->in_addr
.in
, address
->prefixlen
,
1109 link
->network
->dhcp_server_pool_offset
, link
->network
->dhcp_server_pool_size
);
1114 r = sd_dhcp_server_set_router(link->dhcp_server,
1115 &main_address->in_addr.in);
1120 if (link
->network
->dhcp_server_max_lease_time_usec
> 0) {
1121 r
= sd_dhcp_server_set_max_lease_time(
1123 DIV_ROUND_UP(link
->network
->dhcp_server_max_lease_time_usec
, USEC_PER_SEC
));
1128 if (link
->network
->dhcp_server_default_lease_time_usec
> 0) {
1129 r
= sd_dhcp_server_set_default_lease_time(
1131 DIV_ROUND_UP(link
->network
->dhcp_server_default_lease_time_usec
, USEC_PER_SEC
));
1136 if (link
->network
->dhcp_server_emit_dns
) {
1138 if (link
->network
->n_dhcp_server_dns
> 0)
1139 r
= sd_dhcp_server_set_dns(link
->dhcp_server
, link
->network
->dhcp_server_dns
, link
->network
->n_dhcp_server_dns
);
1141 uplink
= manager_find_uplink(link
->manager
, link
);
1142 acquired_uplink
= true;
1145 log_link_debug(link
, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1148 r
= link_push_uplink_dns_to_dhcp_server(uplink
, link
->dhcp_server
);
1151 log_link_warning_errno(link
, r
, "Failed to set DNS server for DHCP server, ignoring: %m");
1154 if (link
->network
->dhcp_server_emit_ntp
) {
1156 if (link
->network
->n_dhcp_server_ntp
> 0)
1157 r
= sd_dhcp_server_set_ntp(link
->dhcp_server
, link
->network
->dhcp_server_ntp
, link
->network
->n_dhcp_server_ntp
);
1159 if (!acquired_uplink
)
1160 uplink
= manager_find_uplink(link
->manager
, link
);
1163 log_link_debug(link
, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1166 r
= link_push_uplink_ntp_to_dhcp_server(uplink
, link
->dhcp_server
);
1170 log_link_warning_errno(link
, r
, "Failed to set NTP server for DHCP server, ignoring: %m");
1173 r
= sd_dhcp_server_set_emit_router(link
->dhcp_server
, link
->network
->dhcp_server_emit_router
);
1175 return log_link_warning_errno(link
, r
, "Failed to set router emission for DHCP server: %m");
1177 if (link
->network
->dhcp_server_emit_timezone
) {
1178 _cleanup_free_
char *buffer
= NULL
;
1179 const char *tz
= NULL
;
1181 if (link
->network
->dhcp_server_timezone
)
1182 tz
= link
->network
->dhcp_server_timezone
;
1184 r
= get_timezone(&buffer
);
1186 log_warning_errno(r
, "Failed to determine timezone: %m");
1192 r
= sd_dhcp_server_set_timezone(link
->dhcp_server
, tz
);
1198 r
= sd_dhcp_server_start(link
->dhcp_server
);
1200 log_link_warning_errno(link
, r
, "Could not start DHCPv4 server instance: %m");
1202 link_enter_failed(link
);
1207 log_link_debug(link
, "Offering DHCPv4 leases");
1210 if (link
->address_messages
== 0)
1211 link_enter_set_routes(link
);
1213 log_link_debug(link
, "Setting addresses");
1218 int link_address_remove_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
1219 Link
*link
= userdata
;
1224 assert(link
->ifname
);
1226 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1229 r
= sd_netlink_message_get_errno(m
);
1230 if (r
< 0 && r
!= -EADDRNOTAVAIL
)
1231 log_link_warning_errno(link
, r
, "Could not drop address: %m");
1236 static int link_set_bridge_vlan(Link
*link
) {
1239 r
= br_vlan_configure(link
, link
->network
->pvid
, link
->network
->br_vid_bitmap
, link
->network
->br_untagged_bitmap
);
1241 log_link_error_errno(link
, r
, "Failed to assign VLANs to bridge port: %m");
1246 static int link_set_proxy_arp(Link
*link
) {
1247 const char *p
= NULL
;
1250 if (!link_proxy_arp_enabled(link
))
1253 p
= strjoina("/proc/sys/net/ipv4/conf/", link
->ifname
, "/proxy_arp");
1255 r
= write_string_file(p
, one_zero(link
->network
->proxy_arp
), WRITE_STRING_FILE_VERIFY_ON_FAILURE
);
1257 log_link_warning_errno(link
, r
, "Cannot configure proxy ARP for interface: %m");
1262 static int link_set_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
1263 Link
*link
= userdata
;
1268 log_link_debug(link
, "Set link");
1270 r
= sd_netlink_message_get_errno(m
);
1271 if (r
< 0 && r
!= -EEXIST
) {
1272 log_link_error_errno(link
, r
, "Could not join netdev: %m");
1273 link_enter_failed(link
);
1279 static int link_configure_after_setting_mtu(Link
*link
);
1281 static int set_mtu_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
1282 Link
*link
= userdata
;
1287 assert(link
->ifname
);
1289 link
->setting_mtu
= false;
1291 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1294 r
= sd_netlink_message_get_errno(m
);
1296 log_link_warning_errno(link
, r
, "Could not set MTU: %m");
1300 log_link_debug(link
, "Setting MTU done.");
1302 if (link
->state
== LINK_STATE_PENDING
)
1303 (void) link_configure_after_setting_mtu(link
);
1308 int link_set_mtu(Link
*link
, uint32_t mtu
) {
1309 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1313 assert(link
->manager
);
1314 assert(link
->manager
->rtnl
);
1316 if (link
->mtu
== mtu
|| link
->setting_mtu
)
1319 log_link_debug(link
, "Setting MTU: %" PRIu32
, mtu
);
1321 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1323 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1325 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
1326 * for this interface, or if it is a bridge slave, then disable IPv6 else enable it. */
1327 (void) link_enable_ipv6(link
);
1329 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
1330 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1331 if (link_ipv6_enabled(link
) && mtu
< IPV6_MIN_MTU
) {
1333 log_link_warning(link
, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU
) ", as "
1334 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU
) " bytes: %m");
1339 r
= sd_netlink_message_append_u32(req
, IFLA_MTU
, mtu
);
1341 return log_link_error_errno(link
, r
, "Could not append MTU: %m");
1343 r
= sd_netlink_call_async(link
->manager
->rtnl
, NULL
, req
, set_mtu_handler
,
1344 link_netlink_destroy_callback
, link
, 0, __func__
);
1346 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1349 link
->setting_mtu
= true;
1354 static int set_flags_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
1355 Link
*link
= userdata
;
1360 assert(link
->ifname
);
1362 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1365 r
= sd_netlink_message_get_errno(m
);
1367 log_link_warning_errno(link
, r
, "Could not set link flags: %m");
1372 static int link_set_flags(Link
*link
) {
1373 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1374 unsigned ifi_change
= 0;
1375 unsigned ifi_flags
= 0;
1379 assert(link
->manager
);
1380 assert(link
->manager
->rtnl
);
1382 if (link
->flags
& IFF_LOOPBACK
)
1388 if (link
->network
->arp
< 0 && link
->network
->multicast
< 0 && link
->network
->allmulticast
< 0)
1391 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1393 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1395 if (link
->network
->arp
>= 0) {
1396 ifi_change
|= IFF_NOARP
;
1397 SET_FLAG(ifi_flags
, IFF_NOARP
, link
->network
->arp
== 0);
1400 if (link
->network
->multicast
>= 0) {
1401 ifi_change
|= IFF_MULTICAST
;
1402 SET_FLAG(ifi_flags
, IFF_MULTICAST
, link
->network
->multicast
);
1405 if (link
->network
->allmulticast
>= 0) {
1406 ifi_change
|= IFF_ALLMULTI
;
1407 SET_FLAG(ifi_flags
, IFF_ALLMULTI
, link
->network
->allmulticast
);
1410 r
= sd_rtnl_message_link_set_flags(req
, ifi_flags
, ifi_change
);
1412 return log_link_error_errno(link
, r
, "Could not set link flags: %m");
1414 r
= sd_netlink_call_async(link
->manager
->rtnl
, NULL
, req
, set_flags_handler
,
1415 link_netlink_destroy_callback
, link
, 0, __func__
);
1417 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1424 static int link_set_bridge(Link
*link
) {
1425 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1429 assert(link
->network
);
1431 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1433 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1435 r
= sd_rtnl_message_link_set_family(req
, PF_BRIDGE
);
1437 return log_link_error_errno(link
, r
, "Could not set message family: %m");
1439 r
= sd_netlink_message_open_container(req
, IFLA_PROTINFO
);
1441 return log_link_error_errno(link
, r
, "Could not append IFLA_PROTINFO attribute: %m");
1443 if (link
->network
->use_bpdu
>= 0) {
1444 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_GUARD
, link
->network
->use_bpdu
);
1446 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1449 if (link
->network
->hairpin
>= 0) {
1450 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_MODE
, link
->network
->hairpin
);
1452 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_MODE attribute: %m");
1455 if (link
->network
->fast_leave
>= 0) {
1456 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_FAST_LEAVE
, link
->network
->fast_leave
);
1458 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1461 if (link
->network
->allow_port_to_be_root
>= 0) {
1462 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_PROTECT
, link
->network
->allow_port_to_be_root
);
1464 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
1468 if (link
->network
->unicast_flood
>= 0) {
1469 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_UNICAST_FLOOD
, link
->network
->unicast_flood
);
1471 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
1475 if (link
->network
->cost
!= 0) {
1476 r
= sd_netlink_message_append_u32(req
, IFLA_BRPORT_COST
, link
->network
->cost
);
1478 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_COST attribute: %m");
1480 if (link
->network
->priority
!= LINK_BRIDGE_PORT_PRIORITY_INVALID
) {
1481 r
= sd_netlink_message_append_u16(req
, IFLA_BRPORT_PRIORITY
, link
->network
->priority
);
1483 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1486 r
= sd_netlink_message_close_container(req
);
1488 return log_link_error_errno(link
, r
, "Could not append IFLA_LINKINFO attribute: %m");
1490 r
= sd_netlink_call_async(link
->manager
->rtnl
, NULL
, req
, link_set_handler
,
1491 link_netlink_destroy_callback
, link
, 0, __func__
);
1493 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1500 static int link_bond_set(Link
*link
) {
1501 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1505 assert(link
->network
);
1507 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_NEWLINK
, link
->network
->bond
->ifindex
);
1509 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1511 r
= sd_netlink_message_set_flags(req
, NLM_F_REQUEST
| NLM_F_ACK
);
1513 return log_link_error_errno(link
, r
, "Could not set netlink flags: %m");
1515 r
= sd_netlink_message_open_container(req
, IFLA_LINKINFO
);
1517 return log_link_error_errno(link
, r
, "Could not append IFLA_PROTINFO attribute: %m");
1519 r
= sd_netlink_message_open_container_union(req
, IFLA_INFO_DATA
, "bond");
1521 return log_link_error_errno(link
, r
, "Could not append IFLA_INFO_DATA attribute: %m");
1523 if (link
->network
->active_slave
) {
1524 r
= sd_netlink_message_append_u32(req
, IFLA_BOND_ACTIVE_SLAVE
, link
->ifindex
);
1526 return log_link_error_errno(link
, r
, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1529 if (link
->network
->primary_slave
) {
1530 r
= sd_netlink_message_append_u32(req
, IFLA_BOND_PRIMARY
, link
->ifindex
);
1532 return log_link_error_errno(link
, r
, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1535 r
= sd_netlink_message_close_container(req
);
1537 return log_link_error_errno(link
, r
, "Could not append IFLA_LINKINFO attribute: %m");
1539 r
= sd_netlink_message_close_container(req
);
1541 return log_link_error_errno(link
, r
, "Could not append IFLA_INFO_DATA attribute: %m");
1543 r
= sd_netlink_call_async(link
->manager
->rtnl
, NULL
, req
, set_flags_handler
,
1544 link_netlink_destroy_callback
, link
, 0, __func__
);
1546 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1553 static int link_lldp_save(Link
*link
) {
1554 _cleanup_free_
char *temp_path
= NULL
;
1555 _cleanup_fclose_
FILE *f
= NULL
;
1556 sd_lldp_neighbor
**l
= NULL
;
1560 assert(link
->lldp_file
);
1563 (void) unlink(link
->lldp_file
);
1567 r
= sd_lldp_get_neighbors(link
->lldp
, &l
);
1571 (void) unlink(link
->lldp_file
);
1577 r
= fopen_temporary(link
->lldp_file
, &f
, &temp_path
);
1581 fchmod(fileno(f
), 0644);
1583 for (i
= 0; i
< n
; i
++) {
1588 r
= sd_lldp_neighbor_get_raw(l
[i
], &p
, &sz
);
1593 (void) fwrite(&u
, 1, sizeof(u
), f
);
1594 (void) fwrite(p
, 1, sz
, f
);
1597 r
= fflush_and_check(f
);
1601 if (rename(temp_path
, link
->lldp_file
) < 0) {
1608 (void) unlink(link
->lldp_file
);
1610 (void) unlink(temp_path
);
1612 log_link_error_errno(link
, r
, "Failed to save LLDP data to %s: %m", link
->lldp_file
);
1616 for (i
= 0; i
< n
; i
++)
1617 sd_lldp_neighbor_unref(l
[i
]);
1624 static void lldp_handler(sd_lldp
*lldp
, sd_lldp_event event
, sd_lldp_neighbor
*n
, void *userdata
) {
1625 Link
*link
= userdata
;
1630 (void) link_lldp_save(link
);
1632 if (link_lldp_emit_enabled(link
) && event
== SD_LLDP_EVENT_ADDED
) {
1633 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1635 log_link_debug(link
, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1637 r
= link_lldp_emit_start(link
);
1639 log_link_warning_errno(link
, r
, "Failed to restart LLDP transmission: %m");
1643 static int link_acquire_ipv6_conf(Link
*link
) {
1648 if (link_ipv6_accept_ra_enabled(link
)) {
1649 assert(link
->ndisc
);
1651 log_link_debug(link
, "Discovering IPv6 routers");
1653 r
= sd_ndisc_start(link
->ndisc
);
1654 if (r
< 0 && r
!= -EBUSY
)
1655 return log_link_warning_errno(link
, r
, "Could not start IPv6 Router Discovery: %m");
1658 if (link_radv_enabled(link
)) {
1660 assert(in_addr_is_link_local(AF_INET6
, (const union in_addr_union
*)&link
->ipv6ll_address
) > 0);
1662 log_link_debug(link
, "Starting IPv6 Router Advertisements");
1664 r
= sd_radv_start(link
->radv
);
1665 if (r
< 0 && r
!= -EBUSY
)
1666 return log_link_warning_errno(link
, r
, "Could not start IPv6 Router Advertisement: %m");
1669 (void) dhcp6_request_prefix_delegation(link
);
1674 static int link_acquire_ipv4_conf(Link
*link
) {
1678 assert(link
->network
);
1679 assert(link
->manager
);
1680 assert(link
->manager
->event
);
1682 if (link_ipv4ll_enabled(link
)) {
1683 assert(link
->ipv4ll
);
1685 log_link_debug(link
, "Acquiring IPv4 link-local address");
1687 r
= sd_ipv4ll_start(link
->ipv4ll
);
1689 return log_link_warning_errno(link
, r
, "Could not acquire IPv4 link-local address: %m");
1692 if (link_dhcp4_enabled(link
)) {
1693 assert(link
->dhcp_client
);
1695 log_link_debug(link
, "Acquiring DHCPv4 lease");
1697 r
= sd_dhcp_client_start(link
->dhcp_client
);
1699 return log_link_warning_errno(link
, r
, "Could not acquire DHCPv4 lease: %m");
1705 static int link_acquire_conf(Link
*link
) {
1710 r
= link_acquire_ipv4_conf(link
);
1714 if (in_addr_is_null(AF_INET6
, (const union in_addr_union
*) &link
->ipv6ll_address
) == 0) {
1715 r
= link_acquire_ipv6_conf(link
);
1720 if (link_lldp_emit_enabled(link
)) {
1721 r
= link_lldp_emit_start(link
);
1723 return log_link_warning_errno(link
, r
, "Failed to start LLDP transmission: %m");
1729 bool link_has_carrier(Link
*link
) {
1730 /* see Documentation/networking/operstates.txt in the kernel sources */
1732 if (link
->kernel_operstate
== IF_OPER_UP
)
1735 if (link
->kernel_operstate
== IF_OPER_UNKNOWN
)
1736 /* operstate may not be implemented, so fall back to flags */
1737 if ((link
->flags
& IFF_LOWER_UP
) && !(link
->flags
& IFF_DORMANT
))
1743 static int link_up_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
1744 Link
*link
= userdata
;
1749 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1752 r
= sd_netlink_message_get_errno(m
);
1754 /* we warn but don't fail the link, as it may be brought up later */
1755 log_link_warning_errno(link
, r
, "Could not bring up interface: %m");
1760 int link_up(Link
*link
) {
1761 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1762 uint8_t ipv6ll_mode
;
1766 assert(link
->network
);
1767 assert(link
->manager
);
1768 assert(link
->manager
->rtnl
);
1770 log_link_debug(link
, "Bringing link up");
1772 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1774 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1776 /* set it free if not enslaved with networkd */
1777 if (!link
->network
->bridge
&& !link
->network
->bond
&& !link
->network
->vrf
) {
1778 r
= sd_netlink_message_append_u32(req
, IFLA_MASTER
, 0);
1780 return log_link_error_errno(link
, r
, "Could not append IFLA_MASTER attribute: %m");
1783 r
= sd_rtnl_message_link_set_flags(req
, IFF_UP
, IFF_UP
);
1785 return log_link_error_errno(link
, r
, "Could not set link flags: %m");
1787 if (link
->network
->mac
) {
1788 r
= sd_netlink_message_append_ether_addr(req
, IFLA_ADDRESS
, link
->network
->mac
);
1790 return log_link_error_errno(link
, r
, "Could not set MAC address: %m");
1793 r
= sd_netlink_message_open_container(req
, IFLA_AF_SPEC
);
1795 return log_link_error_errno(link
, r
, "Could not open IFLA_AF_SPEC container: %m");
1797 if (link_ipv6_enabled(link
)) {
1798 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1799 r
= sd_netlink_message_open_container(req
, AF_INET6
);
1801 return log_link_error_errno(link
, r
, "Could not open AF_INET6 container: %m");
1803 if (!link_ipv6ll_enabled(link
))
1804 ipv6ll_mode
= IN6_ADDR_GEN_MODE_NONE
;
1806 const char *p
= NULL
;
1807 _cleanup_free_
char *stable_secret
= NULL
;
1809 p
= strjoina("/proc/sys/net/ipv6/conf/", link
->ifname
, "/stable_secret");
1810 r
= read_one_line_file(p
, &stable_secret
);
1813 ipv6ll_mode
= IN6_ADDR_GEN_MODE_EUI64
;
1815 ipv6ll_mode
= IN6_ADDR_GEN_MODE_STABLE_PRIVACY
;
1817 r
= sd_netlink_message_append_u8(req
, IFLA_INET6_ADDR_GEN_MODE
, ipv6ll_mode
);
1819 return log_link_error_errno(link
, r
, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1821 if (!in_addr_is_null(AF_INET6
, &link
->network
->ipv6_token
)) {
1822 r
= sd_netlink_message_append_in6_addr(req
, IFLA_INET6_TOKEN
, &link
->network
->ipv6_token
.in6
);
1824 return log_link_error_errno(link
, r
, "Could not append IFLA_INET6_TOKEN: %m");
1827 r
= sd_netlink_message_close_container(req
);
1829 return log_link_error_errno(link
, r
, "Could not close AF_INET6 container: %m");
1832 r
= sd_netlink_message_close_container(req
);
1834 return log_link_error_errno(link
, r
, "Could not close IFLA_AF_SPEC container: %m");
1836 r
= sd_netlink_call_async(link
->manager
->rtnl
, NULL
, req
, link_up_handler
,
1837 link_netlink_destroy_callback
, link
, 0, __func__
);
1839 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1846 static int link_up_can(Link
*link
) {
1847 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1852 log_link_debug(link
, "Bringing CAN link up");
1854 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1856 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1858 r
= sd_rtnl_message_link_set_flags(req
, IFF_UP
, IFF_UP
);
1860 return log_link_error_errno(link
, r
, "Could not set link flags: %m");
1862 r
= sd_netlink_call_async(link
->manager
->rtnl
, NULL
, req
, link_up_handler
,
1863 link_netlink_destroy_callback
, link
, 0, __func__
);
1865 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1872 static int link_set_can(Link
*link
) {
1873 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*m
= NULL
;
1877 assert(link
->network
);
1878 assert(link
->manager
);
1879 assert(link
->manager
->rtnl
);
1881 log_link_debug(link
, "link_set_can");
1883 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &m
, RTM_NEWLINK
, link
->ifindex
);
1885 return log_link_error_errno(link
, r
, "Failed to allocate netlink message: %m");
1887 r
= sd_netlink_message_set_flags(m
, NLM_F_REQUEST
| NLM_F_ACK
);
1889 return log_link_error_errno(link
, r
, "Could not set netlink flags: %m");
1891 r
= sd_netlink_message_open_container(m
, IFLA_LINKINFO
);
1893 return log_link_error_errno(link
, r
, "Failed to open netlink container: %m");
1895 r
= sd_netlink_message_open_container_union(m
, IFLA_INFO_DATA
, link
->kind
);
1897 return log_link_error_errno(link
, r
, "Could not append IFLA_INFO_DATA attribute: %m");
1899 if (link
->network
->can_bitrate
> 0 || link
->network
->can_sample_point
> 0) {
1900 struct can_bittiming bt
= {
1901 .bitrate
= link
->network
->can_bitrate
,
1902 .sample_point
= link
->network
->can_sample_point
,
1905 if (link
->network
->can_bitrate
> UINT32_MAX
) {
1906 log_link_error(link
, "bitrate (%zu) too big.", link
->network
->can_bitrate
);
1910 log_link_debug(link
, "Setting bitrate = %d bit/s", bt
.bitrate
);
1911 if (link
->network
->can_sample_point
> 0)
1912 log_link_debug(link
, "Setting sample point = %d.%d%%", bt
.sample_point
/ 10, bt
.sample_point
% 10);
1914 log_link_debug(link
, "Using default sample point");
1916 r
= sd_netlink_message_append_data(m
, IFLA_CAN_BITTIMING
, &bt
, sizeof(bt
));
1918 return log_link_error_errno(link
, r
, "Could not append IFLA_CAN_BITTIMING attribute: %m");
1921 if (link
->network
->can_restart_us
> 0) {
1922 char time_string
[FORMAT_TIMESPAN_MAX
];
1923 uint64_t restart_ms
;
1925 if (link
->network
->can_restart_us
== USEC_INFINITY
)
1928 restart_ms
= DIV_ROUND_UP(link
->network
->can_restart_us
, USEC_PER_MSEC
);
1930 format_timespan(time_string
, FORMAT_TIMESPAN_MAX
, restart_ms
* 1000, MSEC_PER_SEC
);
1932 if (restart_ms
> UINT32_MAX
) {
1933 log_link_error(link
, "restart timeout (%s) too big.", time_string
);
1937 log_link_debug(link
, "Setting restart = %s", time_string
);
1939 r
= sd_netlink_message_append_u32(m
, IFLA_CAN_RESTART_MS
, restart_ms
);
1941 return log_link_error_errno(link
, r
, "Could not append IFLA_CAN_RESTART_MS attribute: %m");
1944 r
= sd_netlink_message_close_container(m
);
1946 return log_link_error_errno(link
, r
, "Failed to close netlink container: %m");
1948 r
= sd_netlink_message_close_container(m
);
1950 return log_link_error_errno(link
, r
, "Failed to close netlink container: %m");
1952 r
= sd_netlink_call_async(link
->manager
->rtnl
, NULL
, m
, link_set_handler
,
1953 link_netlink_destroy_callback
, link
, 0, __func__
);
1955 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1959 if (!(link
->flags
& IFF_UP
)) {
1960 r
= link_up_can(link
);
1962 link_enter_failed(link
);
1967 log_link_debug(link
, "link_set_can done");
1972 static int link_down_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
1973 Link
*link
= userdata
;
1978 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1981 r
= sd_netlink_message_get_errno(m
);
1983 log_link_warning_errno(link
, r
, "Could not bring down interface: %m");
1985 if (streq_ptr(link
->kind
, "can"))
1991 int link_down(Link
*link
) {
1992 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1996 assert(link
->manager
);
1997 assert(link
->manager
->rtnl
);
1999 log_link_debug(link
, "Bringing link down");
2001 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
,
2002 RTM_SETLINK
, link
->ifindex
);
2004 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
2006 r
= sd_rtnl_message_link_set_flags(req
, 0, IFF_UP
);
2008 return log_link_error_errno(link
, r
, "Could not set link flags: %m");
2010 r
= sd_netlink_call_async(link
->manager
->rtnl
, NULL
, req
, link_down_handler
,
2011 link_netlink_destroy_callback
, link
, 0, __func__
);
2013 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
2020 static int link_handle_bound_to_list(Link
*link
) {
2024 bool required_up
= false;
2025 bool link_is_up
= false;
2029 if (hashmap_isempty(link
->bound_to_links
))
2032 if (link
->flags
& IFF_UP
)
2035 HASHMAP_FOREACH (l
, link
->bound_to_links
, i
)
2036 if (link_has_carrier(l
)) {
2041 if (!required_up
&& link_is_up
) {
2042 r
= link_down(link
);
2045 } else if (required_up
&& !link_is_up
) {
2054 static int link_handle_bound_by_list(Link
*link
) {
2061 if (hashmap_isempty(link
->bound_by_links
))
2064 HASHMAP_FOREACH (l
, link
->bound_by_links
, i
) {
2065 r
= link_handle_bound_to_list(l
);
2073 static int link_put_carrier(Link
*link
, Link
*carrier
, Hashmap
**h
) {
2079 if (link
== carrier
)
2082 if (hashmap_get(*h
, INT_TO_PTR(carrier
->ifindex
)))
2085 r
= hashmap_ensure_allocated(h
, NULL
);
2089 r
= hashmap_put(*h
, INT_TO_PTR(carrier
->ifindex
), carrier
);
2096 static int link_new_bound_by_list(Link
*link
) {
2101 bool list_updated
= false;
2104 assert(link
->manager
);
2108 HASHMAP_FOREACH(carrier
, m
->links
, i
) {
2109 if (!carrier
->network
)
2112 if (strv_isempty(carrier
->network
->bind_carrier
))
2115 if (strv_fnmatch(carrier
->network
->bind_carrier
, link
->ifname
, 0)) {
2116 r
= link_put_carrier(link
, carrier
, &link
->bound_by_links
);
2120 list_updated
= true;
2127 HASHMAP_FOREACH(carrier
, link
->bound_by_links
, i
) {
2128 r
= link_put_carrier(carrier
, link
, &carrier
->bound_to_links
);
2132 link_dirty(carrier
);
2138 static int link_new_bound_to_list(Link
*link
) {
2143 bool list_updated
= false;
2146 assert(link
->manager
);
2151 if (strv_isempty(link
->network
->bind_carrier
))
2156 HASHMAP_FOREACH (carrier
, m
->links
, i
) {
2157 if (strv_fnmatch(link
->network
->bind_carrier
, carrier
->ifname
, 0)) {
2158 r
= link_put_carrier(link
, carrier
, &link
->bound_to_links
);
2162 list_updated
= true;
2169 HASHMAP_FOREACH (carrier
, link
->bound_to_links
, i
) {
2170 r
= link_put_carrier(carrier
, link
, &carrier
->bound_by_links
);
2174 link_dirty(carrier
);
2180 static int link_new_carrier_maps(Link
*link
) {
2183 r
= link_new_bound_by_list(link
);
2187 r
= link_handle_bound_by_list(link
);
2191 r
= link_new_bound_to_list(link
);
2195 r
= link_handle_bound_to_list(link
);
2202 static void link_free_bound_to_list(Link
*link
) {
2206 HASHMAP_FOREACH (bound_to
, link
->bound_to_links
, i
) {
2207 hashmap_remove(link
->bound_to_links
, INT_TO_PTR(bound_to
->ifindex
));
2209 if (hashmap_remove(bound_to
->bound_by_links
, INT_TO_PTR(link
->ifindex
)))
2210 link_dirty(bound_to
);
2216 static void link_free_bound_by_list(Link
*link
) {
2220 HASHMAP_FOREACH (bound_by
, link
->bound_by_links
, i
) {
2221 hashmap_remove(link
->bound_by_links
, INT_TO_PTR(bound_by
->ifindex
));
2223 if (hashmap_remove(bound_by
->bound_to_links
, INT_TO_PTR(link
->ifindex
))) {
2224 link_dirty(bound_by
);
2225 link_handle_bound_to_list(bound_by
);
2232 static void link_free_carrier_maps(Link
*link
) {
2233 bool list_updated
= false;
2237 if (!hashmap_isempty(link
->bound_to_links
)) {
2238 link_free_bound_to_list(link
);
2239 list_updated
= true;
2242 if (!hashmap_isempty(link
->bound_by_links
)) {
2243 link_free_bound_by_list(link
);
2244 list_updated
= true;
2253 void link_drop(Link
*link
) {
2254 if (!link
|| link
->state
== LINK_STATE_LINGER
)
2257 link_set_state(link
, LINK_STATE_LINGER
);
2259 link_free_carrier_maps(link
);
2261 log_link_debug(link
, "Link removed");
2263 (void) unlink(link
->state_file
);
2269 static int link_joined(Link
*link
) {
2273 assert(link
->network
);
2275 if (!hashmap_isempty(link
->bound_to_links
)) {
2276 r
= link_handle_bound_to_list(link
);
2279 } else if (!(link
->flags
& IFF_UP
)) {
2282 link_enter_failed(link
);
2287 if (link
->network
->bridge
) {
2288 r
= link_set_bridge(link
);
2290 log_link_error_errno(link
, r
, "Could not set bridge message: %m");
2293 if (link
->network
->bond
) {
2294 r
= link_bond_set(link
);
2296 log_link_error_errno(link
, r
, "Could not set bond message: %m");
2299 if (link
->network
->use_br_vlan
&&
2300 (link
->network
->bridge
|| streq_ptr("bridge", link
->kind
))) {
2301 r
= link_set_bridge_vlan(link
);
2303 log_link_error_errno(link
, r
, "Could not set bridge vlan: %m");
2306 /* Skip setting up addresses until it gets carrier,
2307 or it would try to set addresses twice,
2308 which is bad for non-idempotent steps. */
2309 if (!link_has_carrier(link
) && !link
->network
->configure_without_carrier
)
2312 return link_enter_set_addresses(link
);
2315 static int netdev_join_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
2316 Link
*link
= userdata
;
2320 assert(link
->network
);
2324 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
2327 r
= sd_netlink_message_get_errno(m
);
2328 if (r
< 0 && r
!= -EEXIST
) {
2329 log_link_error_errno(link
, r
, "Could not join netdev: %m");
2330 link_enter_failed(link
);
2333 log_link_debug(link
, "Joined netdev");
2335 if (link
->enslaving
<= 0)
2341 static int link_enter_join_netdev(Link
*link
) {
2347 assert(link
->network
);
2348 assert(link
->state
== LINK_STATE_PENDING
);
2350 link_set_state(link
, LINK_STATE_ENSLAVING
);
2354 if (!link
->network
->bridge
&&
2355 !link
->network
->bond
&&
2356 !link
->network
->vrf
&&
2357 hashmap_isempty(link
->network
->stacked_netdevs
))
2358 return link_joined(link
);
2360 if (link
->network
->bond
) {
2361 log_struct(LOG_DEBUG
,
2362 LOG_LINK_INTERFACE(link
),
2363 LOG_NETDEV_INTERFACE(link
->network
->bond
),
2364 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", link
->network
->bond
->ifname
));
2366 r
= netdev_join(link
->network
->bond
, link
, netdev_join_handler
);
2368 log_struct_errno(LOG_WARNING
, r
,
2369 LOG_LINK_INTERFACE(link
),
2370 LOG_NETDEV_INTERFACE(link
->network
->bond
),
2371 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", link
->network
->bond
->ifname
));
2372 link_enter_failed(link
);
2379 if (link
->network
->bridge
) {
2380 log_struct(LOG_DEBUG
,
2381 LOG_LINK_INTERFACE(link
),
2382 LOG_NETDEV_INTERFACE(link
->network
->bridge
),
2383 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", link
->network
->bridge
->ifname
));
2385 r
= netdev_join(link
->network
->bridge
, link
, netdev_join_handler
);
2387 log_struct_errno(LOG_WARNING
, r
,
2388 LOG_LINK_INTERFACE(link
),
2389 LOG_NETDEV_INTERFACE(link
->network
->bridge
),
2390 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", link
->network
->bridge
->ifname
));
2391 link_enter_failed(link
);
2398 if (link
->network
->vrf
) {
2399 log_struct(LOG_DEBUG
,
2400 LOG_LINK_INTERFACE(link
),
2401 LOG_NETDEV_INTERFACE(link
->network
->vrf
),
2402 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", link
->network
->vrf
->ifname
));
2404 r
= netdev_join(link
->network
->vrf
, link
, netdev_join_handler
);
2406 log_struct_errno(LOG_WARNING
, r
,
2407 LOG_LINK_INTERFACE(link
),
2408 LOG_NETDEV_INTERFACE(link
->network
->vrf
),
2409 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", link
->network
->vrf
->ifname
));
2410 link_enter_failed(link
);
2417 HASHMAP_FOREACH(netdev
, link
->network
->stacked_netdevs
, i
) {
2419 if (netdev
->ifindex
> 0) {
2424 log_struct(LOG_DEBUG
,
2425 LOG_LINK_INTERFACE(link
),
2426 LOG_NETDEV_INTERFACE(netdev
),
2427 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", netdev
->ifname
));
2429 r
= netdev_join(netdev
, link
, netdev_join_handler
);
2431 log_struct_errno(LOG_WARNING
, r
,
2432 LOG_LINK_INTERFACE(link
),
2433 LOG_NETDEV_INTERFACE(netdev
),
2434 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", netdev
->ifname
));
2435 link_enter_failed(link
);
2445 static int link_set_ipv4_forward(Link
*link
) {
2448 if (!link_ipv4_forward_enabled(link
))
2451 /* We propagate the forwarding flag from one interface to the
2452 * global setting one way. This means: as long as at least one
2453 * interface was configured at any time that had IP forwarding
2454 * enabled the setting will stay on for good. We do this
2455 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2456 * somewhat in sync (see below). */
2458 r
= write_string_file("/proc/sys/net/ipv4/ip_forward", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE
);
2460 log_link_warning_errno(link
, r
, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
2465 static int link_set_ipv6_forward(Link
*link
) {
2468 if (!link_ipv6_forward_enabled(link
))
2471 /* On Linux, the IPv6 stack does not know a per-interface
2472 * packet forwarding setting: either packet forwarding is on
2473 * for all, or off for all. We hence don't bother with a
2474 * per-interface setting, but simply propagate the interface
2475 * flag, if it is set, to the global flag, one-way. Note that
2476 * while IPv4 would allow a per-interface flag, we expose the
2477 * same behaviour there and also propagate the setting from
2478 * one to all, to keep things simple (see above). */
2480 r
= write_string_file("/proc/sys/net/ipv6/conf/all/forwarding", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE
);
2482 log_link_warning_errno(link
, r
, "Cannot configure IPv6 packet forwarding, ignoring: %m");
2487 static int link_set_ipv6_privacy_extensions(Link
*link
) {
2488 char buf
[DECIMAL_STR_MAX(unsigned) + 1];
2489 IPv6PrivacyExtensions s
;
2490 const char *p
= NULL
;
2493 s
= link_ipv6_privacy_extensions(link
);
2497 p
= strjoina("/proc/sys/net/ipv6/conf/", link
->ifname
, "/use_tempaddr");
2498 xsprintf(buf
, "%u", (unsigned) link
->network
->ipv6_privacy_extensions
);
2500 r
= write_string_file(p
, buf
, WRITE_STRING_FILE_VERIFY_ON_FAILURE
);
2502 log_link_warning_errno(link
, r
, "Cannot configure IPv6 privacy extension for interface: %m");
2507 static int link_set_ipv6_accept_ra(Link
*link
) {
2508 const char *p
= NULL
;
2511 /* Make this a NOP if IPv6 is not available */
2512 if (!socket_ipv6_is_supported())
2515 if (link
->flags
& IFF_LOOPBACK
)
2521 p
= strjoina("/proc/sys/net/ipv6/conf/", link
->ifname
, "/accept_ra");
2523 /* We handle router advertisements ourselves, tell the kernel to GTFO */
2524 r
= write_string_file(p
, "0", WRITE_STRING_FILE_VERIFY_ON_FAILURE
);
2526 log_link_warning_errno(link
, r
, "Cannot disable kernel IPv6 accept_ra for interface: %m");
2531 static int link_set_ipv6_dad_transmits(Link
*link
) {
2532 char buf
[DECIMAL_STR_MAX(int) + 1];
2533 const char *p
= NULL
;
2536 /* Make this a NOP if IPv6 is not available */
2537 if (!socket_ipv6_is_supported())
2540 if (link
->flags
& IFF_LOOPBACK
)
2546 if (link
->network
->ipv6_dad_transmits
< 0)
2549 p
= strjoina("/proc/sys/net/ipv6/conf/", link
->ifname
, "/dad_transmits");
2550 xsprintf(buf
, "%i", link
->network
->ipv6_dad_transmits
);
2552 r
= write_string_file(p
, buf
, WRITE_STRING_FILE_VERIFY_ON_FAILURE
);
2554 log_link_warning_errno(link
, r
, "Cannot set IPv6 dad transmits for interface: %m");
2559 static int link_set_ipv6_hop_limit(Link
*link
) {
2560 char buf
[DECIMAL_STR_MAX(int) + 1];
2561 const char *p
= NULL
;
2564 /* Make this a NOP if IPv6 is not available */
2565 if (!socket_ipv6_is_supported())
2568 if (link
->flags
& IFF_LOOPBACK
)
2574 if (link
->network
->ipv6_hop_limit
< 0)
2577 p
= strjoina("/proc/sys/net/ipv6/conf/", link
->ifname
, "/hop_limit");
2578 xsprintf(buf
, "%i", link
->network
->ipv6_hop_limit
);
2580 r
= write_string_file(p
, buf
, WRITE_STRING_FILE_VERIFY_ON_FAILURE
);
2582 log_link_warning_errno(link
, r
, "Cannot set IPv6 hop limit for interface: %m");
2587 static int link_set_ipv6_mtu(Link
*link
) {
2588 char buf
[DECIMAL_STR_MAX(unsigned) + 1];
2589 const char *p
= NULL
;
2592 /* Make this a NOP if IPv6 is not available */
2593 if (!socket_ipv6_is_supported())
2596 if (link
->flags
& IFF_LOOPBACK
)
2599 if (link
->network
->ipv6_mtu
== 0)
2602 p
= strjoina("/proc/sys/net/ipv6/conf/", link
->ifname
, "/mtu");
2604 xsprintf(buf
, "%" PRIu32
, link
->network
->ipv6_mtu
);
2606 r
= write_string_file(p
, buf
, 0);
2608 log_link_warning_errno(link
, r
, "Cannot set IPv6 MTU for interface: %m");
2613 static int link_drop_foreign_config(Link
*link
) {
2619 SET_FOREACH(address
, link
->addresses_foreign
, i
) {
2620 /* we consider IPv6LL addresses to be managed by the kernel */
2621 if (address
->family
== AF_INET6
&& in_addr_is_link_local(AF_INET6
, &address
->in_addr
) == 1)
2624 r
= address_remove(address
, link
, link_address_remove_handler
);
2629 SET_FOREACH(route
, link
->routes_foreign
, i
) {
2630 /* do not touch routes managed by the kernel */
2631 if (route
->protocol
== RTPROT_KERNEL
)
2634 r
= route_remove(route
, link
, link_route_remove_handler
);
2642 static int link_drop_config(Link
*link
) {
2643 Address
*address
, *pool_address
;
2648 SET_FOREACH(address
, link
->addresses
, i
) {
2649 /* we consider IPv6LL addresses to be managed by the kernel */
2650 if (address
->family
== AF_INET6
&& in_addr_is_link_local(AF_INET6
, &address
->in_addr
) == 1)
2653 r
= address_remove(address
, link
, link_address_remove_handler
);
2657 /* If this address came from an address pool, clean up the pool */
2658 LIST_FOREACH(addresses
, pool_address
, link
->pool_addresses
) {
2659 if (address_equal(address
, pool_address
)) {
2660 LIST_REMOVE(addresses
, link
->pool_addresses
, pool_address
);
2661 address_free(pool_address
);
2667 SET_FOREACH(route
, link
->routes
, i
) {
2668 /* do not touch routes managed by the kernel */
2669 if (route
->protocol
== RTPROT_KERNEL
)
2672 r
= route_remove(route
, link
, link_route_remove_handler
);
2682 static int link_update_lldp(Link
*link
) {
2690 if (link
->flags
& IFF_UP
) {
2691 r
= sd_lldp_start(link
->lldp
);
2693 log_link_debug(link
, "Started LLDP.");
2695 r
= sd_lldp_stop(link
->lldp
);
2697 log_link_debug(link
, "Stopped LLDP.");
2703 static int link_configure_can(Link
*link
) {
2706 if (streq_ptr(link
->kind
, "can")) {
2707 /* The CAN interface must be down to configure bitrate, etc... */
2708 if ((link
->flags
& IFF_UP
)) {
2709 r
= link_down(link
);
2711 link_enter_failed(link
);
2718 return link_set_can(link
);
2721 if (!(link
->flags
& IFF_UP
)) {
2722 r
= link_up_can(link
);
2724 link_enter_failed(link
);
2732 static int link_configure(Link
*link
) {
2736 assert(link
->network
);
2737 assert(link
->state
== LINK_STATE_PENDING
);
2739 if (STRPTR_IN_SET(link
->kind
, "can", "vcan"))
2740 return link_configure_can(link
);
2742 /* Drop foreign config, but ignore loopback or critical devices.
2743 * We do not want to remove loopback address or addresses used for root NFS. */
2744 if (!(link
->flags
& IFF_LOOPBACK
) && !(link
->network
->dhcp_critical
)) {
2745 r
= link_drop_foreign_config(link
);
2750 r
= link_set_proxy_arp(link
);
2754 r
= ipv6_proxy_ndp_addresses_configure(link
);
2758 r
= link_set_ipv4_forward(link
);
2762 r
= link_set_ipv6_forward(link
);
2766 r
= link_set_ipv6_privacy_extensions(link
);
2770 r
= link_set_ipv6_accept_ra(link
);
2774 r
= link_set_ipv6_dad_transmits(link
);
2778 r
= link_set_ipv6_hop_limit(link
);
2782 r
= link_set_flags(link
);
2786 r
= link_set_ipv6_mtu(link
);
2790 if (link_ipv4ll_enabled(link
)) {
2791 r
= ipv4ll_configure(link
);
2796 if (link_dhcp4_enabled(link
)) {
2797 r
= dhcp4_set_promote_secondaries(link
);
2801 r
= dhcp4_configure(link
);
2806 if (link_dhcp4_server_enabled(link
)) {
2807 r
= sd_dhcp_server_new(&link
->dhcp_server
, link
->ifindex
);
2811 r
= sd_dhcp_server_attach_event(link
->dhcp_server
, NULL
, 0);
2816 if (link_dhcp6_enabled(link
) ||
2817 link_ipv6_accept_ra_enabled(link
)) {
2818 r
= dhcp6_configure(link
);
2823 if (link_ipv6_accept_ra_enabled(link
)) {
2824 r
= ndisc_configure(link
);
2829 if (link_radv_enabled(link
)) {
2830 r
= radv_configure(link
);
2835 if (link_lldp_rx_enabled(link
)) {
2836 r
= sd_lldp_new(&link
->lldp
);
2840 r
= sd_lldp_set_ifindex(link
->lldp
, link
->ifindex
);
2844 r
= sd_lldp_match_capabilities(link
->lldp
,
2845 link
->network
->lldp_mode
== LLDP_MODE_ROUTERS_ONLY
?
2846 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS
:
2847 SD_LLDP_SYSTEM_CAPABILITIES_ALL
);
2851 r
= sd_lldp_set_filter_address(link
->lldp
, &link
->mac
);
2855 r
= sd_lldp_attach_event(link
->lldp
, NULL
, 0);
2859 r
= sd_lldp_set_callback(link
->lldp
, lldp_handler
, link
);
2863 r
= link_update_lldp(link
);
2868 if (link
->network
->mtu
> 0) {
2869 r
= link_set_mtu(link
, link
->network
->mtu
);
2874 return link_configure_after_setting_mtu(link
);
2877 static int link_configure_after_setting_mtu(Link
*link
) {
2881 assert(link
->network
);
2882 assert(link
->state
== LINK_STATE_PENDING
);
2884 if (link
->setting_mtu
)
2887 if (link_has_carrier(link
) || link
->network
->configure_without_carrier
) {
2888 r
= link_acquire_conf(link
);
2893 return link_enter_join_netdev(link
);
2896 static int duid_set_uuid(DUID
*duid
, sd_id128_t uuid
) {
2899 if (duid
->raw_data_len
> 0)
2902 if (duid
->type
!= DUID_TYPE_UUID
)
2905 memcpy(&duid
->raw_data
, &uuid
, sizeof(sd_id128_t
));
2906 duid
->raw_data_len
= sizeof(sd_id128_t
);
2911 int get_product_uuid_handler(sd_bus_message
*m
, void *userdata
, sd_bus_error
*ret_error
) {
2912 Manager
*manager
= userdata
;
2913 const sd_bus_error
*e
;
2923 e
= sd_bus_message_get_error(m
);
2925 log_error_errno(sd_bus_error_get_errno(e
),
2926 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
2931 r
= sd_bus_message_read_array(m
, 'y', &a
, &sz
);
2935 if (sz
!= sizeof(sd_id128_t
)) {
2936 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
2940 memcpy(&manager
->product_uuid
, a
, sz
);
2941 while ((duid
= set_steal_first(manager
->duids_requesting_uuid
)))
2942 (void) duid_set_uuid(duid
, manager
->product_uuid
);
2944 manager
->duids_requesting_uuid
= set_free(manager
->duids_requesting_uuid
);
2947 while ((link
= set_steal_first(manager
->links_requesting_uuid
))) {
2948 r
= link_configure(link
);
2950 log_link_error_errno(link
, r
, "Failed to configure link: %m");
2953 manager
->links_requesting_uuid
= set_free(manager
->links_requesting_uuid
);
2955 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2956 * even if the method fails. */
2957 manager
->has_product_uuid
= true;
2962 static bool link_requires_uuid(Link
*link
) {
2966 assert(link
->manager
);
2967 assert(link
->network
);
2969 duid
= link_get_duid(link
);
2970 if (duid
->type
!= DUID_TYPE_UUID
|| duid
->raw_data_len
!= 0)
2973 if (link_dhcp4_enabled(link
) && IN_SET(link
->network
->dhcp_client_identifier
, DHCP_CLIENT_ID_DUID
, DHCP_CLIENT_ID_DUID_ONLY
))
2976 if (link_dhcp6_enabled(link
) || link_ipv6_accept_ra_enabled(link
))
2982 static int link_configure_duid(Link
*link
) {
2988 assert(link
->manager
);
2989 assert(link
->network
);
2992 duid
= link_get_duid(link
);
2994 if (!link_requires_uuid(link
))
2997 if (m
->has_product_uuid
) {
2998 (void) duid_set_uuid(duid
, m
->product_uuid
);
3002 if (!m
->links_requesting_uuid
) {
3003 r
= manager_request_product_uuid(m
, link
);
3008 log_link_warning_errno(link
, r
,
3009 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
3013 r
= set_put(m
->links_requesting_uuid
, link
);
3017 r
= set_put(m
->duids_requesting_uuid
, duid
);
3025 static int link_initialized_and_synced(Link
*link
) {
3030 assert(link
->ifname
);
3031 assert(link
->manager
);
3033 if (link
->state
!= LINK_STATE_PENDING
)
3036 log_link_debug(link
, "Link state is up-to-date");
3038 r
= link_new_bound_by_list(link
);
3042 r
= link_handle_bound_by_list(link
);
3046 if (!link
->network
) {
3047 r
= network_get(link
->manager
, link
->sd_device
, link
->ifname
,
3048 &link
->mac
, &network
);
3050 link_enter_unmanaged(link
);
3052 } else if (r
== 0 && network
->unmanaged
) {
3053 link_enter_unmanaged(link
);
3058 if (link
->flags
& IFF_LOOPBACK
) {
3059 if (network
->link_local
!= ADDRESS_FAMILY_NO
)
3060 log_link_debug(link
, "Ignoring link-local autoconfiguration for loopback link");
3062 if (network
->dhcp
!= ADDRESS_FAMILY_NO
)
3063 log_link_debug(link
, "Ignoring DHCP clients for loopback link");
3065 if (network
->dhcp_server
)
3066 log_link_debug(link
, "Ignoring DHCP server for loopback link");
3069 r
= network_apply(network
, link
);
3074 r
= link_new_bound_to_list(link
);
3078 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3079 * link_configure() is called later asynchronously. */
3080 r
= link_configure_duid(link
);
3084 r
= link_configure(link
);
3091 static int link_initialized_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
3092 (void) link_initialized_and_synced(userdata
);
3096 int link_initialized(Link
*link
, sd_device
*device
) {
3097 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
3101 assert(link
->manager
);
3102 assert(link
->manager
->rtnl
);
3105 if (link
->state
!= LINK_STATE_PENDING
)
3108 if (link
->sd_device
)
3111 log_link_debug(link
, "udev initialized link");
3113 link
->sd_device
= sd_device_ref(device
);
3115 /* udev has initialized the link, but we don't know if we have yet
3116 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3117 * when it returns we know that the pending NEWLINKs have already been
3118 * processed and that we are up-to-date */
3120 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_GETLINK
,
3125 r
= sd_netlink_call_async(link
->manager
->rtnl
, NULL
, req
, link_initialized_handler
,
3126 link_netlink_destroy_callback
, link
, 0, __func__
);
3135 static int link_load(Link
*link
) {
3136 _cleanup_free_
char *network_file
= NULL
,
3139 *dhcp4_address
= NULL
,
3140 *ipv4ll_address
= NULL
;
3141 union in_addr_union address
;
3142 union in_addr_union route_dst
;
3148 r
= parse_env_file(NULL
, link
->state_file
, NEWLINE
,
3149 "NETWORK_FILE", &network_file
,
3150 "ADDRESSES", &addresses
,
3152 "DHCP4_ADDRESS", &dhcp4_address
,
3153 "IPV4LL_ADDRESS", &ipv4ll_address
,
3155 if (r
< 0 && r
!= -ENOENT
)
3156 return log_link_error_errno(link
, r
, "Failed to read %s: %m", link
->state_file
);
3163 suffix
= strrchr(network_file
, '.');
3165 log_link_debug(link
, "Failed to get network name from %s", network_file
);
3166 goto network_file_fail
;
3170 r
= network_get_by_name(link
->manager
, basename(network_file
), &network
);
3172 log_link_debug_errno(link
, r
, "Failed to get network %s: %m", basename(network_file
));
3173 goto network_file_fail
;
3176 r
= network_apply(network
, link
);
3178 return log_link_error_errno(link
, r
, "Failed to apply network %s: %m", basename(network_file
));
3187 _cleanup_free_
char *address_str
= NULL
;
3188 char *prefixlen_str
;
3190 unsigned char prefixlen
;
3192 r
= extract_first_word(&p
, &address_str
, NULL
, 0);
3194 log_link_debug_errno(link
, r
, "Failed to extract next address string: %m");
3200 prefixlen_str
= strchr(address_str
, '/');
3201 if (!prefixlen_str
) {
3202 log_link_debug(link
, "Failed to parse address and prefix length %s", address_str
);
3206 *prefixlen_str
++ = '\0';
3208 r
= sscanf(prefixlen_str
, "%hhu", &prefixlen
);
3210 log_link_error(link
, "Failed to parse prefixlen %s", prefixlen_str
);
3214 r
= in_addr_from_string_auto(address_str
, &family
, &address
);
3216 log_link_debug_errno(link
, r
, "Failed to parse address %s: %m", address_str
);
3220 r
= address_add(link
, family
, &address
, prefixlen
, NULL
);
3222 return log_link_error_errno(link
, r
, "Failed to add address: %m");
3231 _cleanup_free_
char *route_str
= NULL
;
3232 _cleanup_(sd_event_source_unrefp
) sd_event_source
*expire
= NULL
;
3234 char *prefixlen_str
;
3236 unsigned char prefixlen
, tos
, table
;
3239 r
= extract_first_word(&p
, &route_str
, NULL
, 0);
3241 log_link_debug_errno(link
, r
, "Failed to extract next route string: %m");
3247 prefixlen_str
= strchr(route_str
, '/');
3248 if (!prefixlen_str
) {
3249 log_link_debug(link
, "Failed to parse route %s", route_str
);
3253 *prefixlen_str
++ = '\0';
3255 r
= sscanf(prefixlen_str
, "%hhu/%hhu/%"SCNu32
"/%hhu/"USEC_FMT
, &prefixlen
, &tos
, &priority
, &table
, &lifetime
);
3257 log_link_debug(link
,
3258 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3263 r
= in_addr_from_string_auto(route_str
, &family
, &route_dst
);
3265 log_link_debug_errno(link
, r
, "Failed to parse route destination %s: %m", route_str
);
3269 r
= route_add(link
, family
, &route_dst
, prefixlen
, tos
, priority
, table
, &route
);
3271 return log_link_error_errno(link
, r
, "Failed to add route: %m");
3273 if (lifetime
!= USEC_INFINITY
&& !kernel_route_expiration_supported()) {
3274 r
= sd_event_add_time(link
->manager
->event
, &expire
, clock_boottime_or_monotonic(), lifetime
,
3275 0, route_expire_handler
, route
);
3277 log_link_warning_errno(link
, r
, "Could not arm route expiration handler: %m");
3280 route
->lifetime
= lifetime
;
3281 sd_event_source_unref(route
->expire
);
3282 route
->expire
= TAKE_PTR(expire
);
3286 if (dhcp4_address
) {
3287 r
= in_addr_from_string(AF_INET
, dhcp4_address
, &address
);
3289 log_link_debug_errno(link
, r
, "Failed to parse DHCPv4 address %s: %m", dhcp4_address
);
3290 goto dhcp4_address_fail
;
3293 r
= sd_dhcp_client_new(&link
->dhcp_client
, link
->network
? link
->network
->dhcp_anonymize
: 0);
3295 return log_link_error_errno(link
, r
, "Failed to create DHCPv4 client: %m");
3297 r
= sd_dhcp_client_set_request_address(link
->dhcp_client
, &address
.in
);
3299 return log_link_error_errno(link
, r
, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address
);
3304 if (ipv4ll_address
) {
3305 r
= in_addr_from_string(AF_INET
, ipv4ll_address
, &address
);
3307 log_link_debug_errno(link
, r
, "Failed to parse IPv4LL address %s: %m", ipv4ll_address
);
3308 goto ipv4ll_address_fail
;
3311 r
= sd_ipv4ll_new(&link
->ipv4ll
);
3313 return log_link_error_errno(link
, r
, "Failed to create IPv4LL client: %m");
3315 r
= sd_ipv4ll_set_address(link
->ipv4ll
, &address
.in
);
3317 return log_link_error_errno(link
, r
, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address
);
3320 ipv4ll_address_fail
:
3325 int link_add(Manager
*m
, sd_netlink_message
*message
, Link
**ret
) {
3326 _cleanup_(sd_device_unrefp
) sd_device
*device
= NULL
;
3327 char ifindex_str
[2 + DECIMAL_STR_MAX(int)];
3336 r
= link_new(m
, message
, ret
);
3342 log_link_debug(link
, "Link %d added", link
->ifindex
);
3344 r
= link_load(link
);
3348 if (detect_container() <= 0) {
3349 /* not in a container, udev will be around */
3350 sprintf(ifindex_str
, "n%d", link
->ifindex
);
3351 r
= sd_device_new_from_device_id(&device
, ifindex_str
);
3353 log_link_warning_errno(link
, r
, "Could not find device: %m");
3357 r
= sd_device_get_is_initialized(device
, &initialized
);
3359 log_link_warning_errno(link
, r
, "Could not determine whether the device is initialized or not: %m");
3364 log_link_debug(link
, "link pending udev initialization...");
3368 r
= link_initialized(link
, device
);
3372 r
= link_initialized_and_synced(link
);
3379 link_enter_failed(link
);
3383 int link_ipv6ll_gained(Link
*link
, const struct in6_addr
*address
) {
3388 log_link_info(link
, "Gained IPv6LL");
3390 link
->ipv6ll_address
= *address
;
3391 link_check_ready(link
);
3393 if (!IN_SET(link
->state
, LINK_STATE_PENDING
, LINK_STATE_UNMANAGED
, LINK_STATE_FAILED
)) {
3394 r
= link_acquire_ipv6_conf(link
);
3396 link_enter_failed(link
);
3404 static int link_carrier_gained(Link
*link
) {
3409 if (!IN_SET(link
->state
, LINK_STATE_PENDING
, LINK_STATE_UNMANAGED
, LINK_STATE_FAILED
)) {
3410 r
= link_acquire_conf(link
);
3412 link_enter_failed(link
);
3416 r
= link_enter_set_addresses(link
);
3421 r
= link_handle_bound_by_list(link
);
3428 static int link_carrier_lost(Link
*link
) {
3433 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
3434 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3435 * configuration and stop the clients as well. */
3436 if (link
->setting_mtu
)
3439 r
= link_stop_clients(link
);
3441 link_enter_failed(link
);
3445 if (link_dhcp4_server_enabled(link
))
3446 (void) sd_dhcp_server_stop(link
->dhcp_server
);
3448 r
= link_drop_config(link
);
3452 if (!IN_SET(link
->state
, LINK_STATE_UNMANAGED
, LINK_STATE_PENDING
)) {
3453 log_link_debug(link
, "State is %s, dropping config", link_state_to_string(link
->state
));
3454 r
= link_drop_foreign_config(link
);
3459 r
= link_handle_bound_by_list(link
);
3466 int link_carrier_reset(Link
*link
) {
3471 if (link_has_carrier(link
)) {
3472 r
= link_carrier_lost(link
);
3476 r
= link_carrier_gained(link
);
3480 log_link_info(link
, "Reset carrier");
3486 int link_update(Link
*link
, sd_netlink_message
*m
) {
3487 struct ether_addr mac
;
3490 bool had_carrier
, carrier_gained
, carrier_lost
;
3494 assert(link
->ifname
);
3497 if (link
->state
== LINK_STATE_LINGER
) {
3498 log_link_info(link
, "Link readded");
3499 link_set_state(link
, LINK_STATE_ENSLAVING
);
3501 r
= link_new_carrier_maps(link
);
3506 r
= sd_netlink_message_read_string(m
, IFLA_IFNAME
, &ifname
);
3507 if (r
>= 0 && !streq(ifname
, link
->ifname
)) {
3508 log_link_info(link
, "Interface name change detected, %s has been renamed to %s.", link
->ifname
, ifname
);
3510 if (link
->state
== LINK_STATE_PENDING
) {
3511 r
= free_and_strdup(&link
->ifname
, ifname
);
3515 Manager
*manager
= link
->manager
;
3518 r
= link_add(manager
, m
, &link
);
3524 r
= sd_netlink_message_read_u32(m
, IFLA_MTU
, &mtu
);
3525 if (r
>= 0 && mtu
> 0) {
3527 if (link
->original_mtu
== 0) {
3528 link
->original_mtu
= mtu
;
3529 log_link_debug(link
, "Saved original MTU: %" PRIu32
, link
->original_mtu
);
3532 if (link
->dhcp_client
) {
3533 r
= sd_dhcp_client_set_mtu(link
->dhcp_client
,
3536 return log_link_warning_errno(link
, r
, "Could not update MTU in DHCP client: %m");
3540 r
= sd_radv_set_mtu(link
->radv
, link
->mtu
);
3542 return log_link_warning_errno(link
, r
, "Could not set MTU for Router Advertisement: %m");
3546 /* The kernel may broadcast NEWLINK messages without the MAC address
3547 set, simply ignore them. */
3548 r
= sd_netlink_message_read_ether_addr(m
, IFLA_ADDRESS
, &mac
);
3550 if (memcmp(link
->mac
.ether_addr_octet
, mac
.ether_addr_octet
,
3553 memcpy(link
->mac
.ether_addr_octet
, mac
.ether_addr_octet
,
3556 log_link_debug(link
, "MAC address: "
3557 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3558 mac
.ether_addr_octet
[0],
3559 mac
.ether_addr_octet
[1],
3560 mac
.ether_addr_octet
[2],
3561 mac
.ether_addr_octet
[3],
3562 mac
.ether_addr_octet
[4],
3563 mac
.ether_addr_octet
[5]);
3566 r
= sd_ipv4ll_set_mac(link
->ipv4ll
, &link
->mac
);
3568 return log_link_warning_errno(link
, r
, "Could not update MAC address in IPv4LL client: %m");
3571 if (link
->dhcp_client
) {
3572 r
= sd_dhcp_client_set_mac(link
->dhcp_client
,
3573 (const uint8_t *) &link
->mac
,
3577 return log_link_warning_errno(link
, r
, "Could not update MAC address in DHCP client: %m");
3579 r
= dhcp4_set_client_identifier(link
);
3584 if (link
->dhcp6_client
) {
3585 const DUID
* duid
= link_get_duid(link
);
3587 r
= sd_dhcp6_client_set_mac(link
->dhcp6_client
,
3588 (const uint8_t *) &link
->mac
,
3592 return log_link_warning_errno(link
, r
, "Could not update MAC address in DHCPv6 client: %m");
3594 r
= sd_dhcp6_client_set_iaid(link
->dhcp6_client
,
3595 link
->network
->iaid
);
3597 return log_link_warning_errno(link
, r
, "Could not update DHCPv6 IAID: %m");
3599 r
= sd_dhcp6_client_set_duid(link
->dhcp6_client
,
3601 duid
->raw_data_len
> 0 ? duid
->raw_data
: NULL
,
3602 duid
->raw_data_len
);
3604 return log_link_warning_errno(link
, r
, "Could not update DHCPv6 DUID: %m");
3608 r
= sd_radv_set_mac(link
->radv
, &link
->mac
);
3610 return log_link_warning_errno(link
, r
, "Could not update MAC for Router Advertisement: %m");
3614 r
= sd_ndisc_set_mac(link
->ndisc
, &link
->mac
);
3616 return log_link_warning_errno(link
, r
, "Could not update MAC for ndisc: %m");
3621 had_carrier
= link_has_carrier(link
);
3623 r
= link_update_flags(link
, m
);
3627 r
= link_update_lldp(link
);
3631 carrier_gained
= !had_carrier
&& link_has_carrier(link
);
3632 carrier_lost
= had_carrier
&& !link_has_carrier(link
);
3634 if (carrier_gained
) {
3635 log_link_info(link
, "Gained carrier");
3637 r
= link_carrier_gained(link
);
3640 } else if (carrier_lost
) {
3641 log_link_info(link
, "Lost carrier");
3643 r
= link_carrier_lost(link
);
3651 static void print_link_hashmap(FILE *f
, const char *prefix
, Hashmap
* h
) {
3659 if (hashmap_isempty(h
))
3663 HASHMAP_FOREACH(link
, h
, i
) {
3667 fprintf(f
, "%i", link
->ifindex
);
3674 int link_save(Link
*link
) {
3675 _cleanup_free_
char *temp_path
= NULL
;
3676 _cleanup_fclose_
FILE *f
= NULL
;
3677 const char *admin_state
, *oper_state
;
3684 assert(link
->state_file
);
3685 assert(link
->lease_file
);
3686 assert(link
->manager
);
3688 if (link
->state
== LINK_STATE_LINGER
) {
3689 unlink(link
->state_file
);
3693 link_lldp_save(link
);
3695 admin_state
= link_state_to_string(link
->state
);
3696 assert(admin_state
);
3698 oper_state
= link_operstate_to_string(link
->operstate
);
3701 r
= fopen_temporary(link
->state_file
, &f
, &temp_path
);
3705 (void) __fsetlocking(f
, FSETLOCKING_BYCALLER
);
3706 (void) fchmod(fileno(f
), 0644);
3709 "# This is private data. Do not parse.\n"
3712 admin_state
, oper_state
);
3714 if (link
->network
) {
3716 sd_dhcp6_lease
*dhcp6_lease
= NULL
;
3717 const char *dhcp_domainname
= NULL
;
3718 char **dhcp6_domains
= NULL
;
3719 char **dhcp_domains
= NULL
;
3722 fprintf(f
, "REQUIRED_FOR_ONLINE=%s\n",
3723 yes_no(link
->network
->required_for_online
));
3725 if (link
->dhcp6_client
) {
3726 r
= sd_dhcp6_client_get_lease(link
->dhcp6_client
, &dhcp6_lease
);
3727 if (r
< 0 && r
!= -ENOMSG
)
3728 log_link_debug(link
, "No DHCPv6 lease");
3731 fprintf(f
, "NETWORK_FILE=%s\n", link
->network
->filename
);
3736 for (j
= 0; j
< link
->network
->n_dns
; j
++) {
3737 _cleanup_free_
char *b
= NULL
;
3739 r
= in_addr_to_string(link
->network
->dns
[j
].family
,
3740 &link
->network
->dns
[j
].address
, &b
);
3742 log_debug_errno(r
, "Failed to format address, ignoring: %m");
3752 if (link
->network
->dhcp_use_dns
&&
3754 const struct in_addr
*addresses
;
3756 r
= sd_dhcp_lease_get_dns(link
->dhcp_lease
, &addresses
);
3760 serialize_in_addrs(f
, addresses
, r
);
3765 if (link
->network
->dhcp_use_dns
&& dhcp6_lease
) {
3766 struct in6_addr
*in6_addrs
;
3768 r
= sd_dhcp6_lease_get_dns(dhcp6_lease
, &in6_addrs
);
3772 serialize_in6_addrs(f
, in6_addrs
, r
);
3777 /* Make sure to flush out old entries before we use the NDISC data */
3780 if (link
->network
->ipv6_accept_ra_use_dns
&& link
->ndisc_rdnss
) {
3783 SET_FOREACH(dd
, link
->ndisc_rdnss
, i
) {
3787 serialize_in6_addrs(f
, &dd
->address
, 1);
3796 fputstrv(f
, link
->network
->ntp
, NULL
, &space
);
3798 if (link
->network
->dhcp_use_ntp
&&
3800 const struct in_addr
*addresses
;
3802 r
= sd_dhcp_lease_get_ntp(link
->dhcp_lease
, &addresses
);
3806 serialize_in_addrs(f
, addresses
, r
);
3811 if (link
->network
->dhcp_use_ntp
&& dhcp6_lease
) {
3812 struct in6_addr
*in6_addrs
;
3815 r
= sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease
,
3820 serialize_in6_addrs(f
, in6_addrs
, r
);
3824 r
= sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease
, &hosts
);
3826 fputstrv(f
, hosts
, NULL
, &space
);
3831 if (link
->network
->dhcp_use_domains
!= DHCP_USE_DOMAINS_NO
) {
3832 if (link
->dhcp_lease
) {
3833 (void) sd_dhcp_lease_get_domainname(link
->dhcp_lease
, &dhcp_domainname
);
3834 (void) sd_dhcp_lease_get_search_domains(link
->dhcp_lease
, &dhcp_domains
);
3837 (void) sd_dhcp6_lease_get_domains(dhcp6_lease
, &dhcp6_domains
);
3840 fputs("DOMAINS=", f
);
3842 fputstrv(f
, link
->network
->search_domains
, NULL
, &space
);
3844 if (link
->network
->dhcp_use_domains
== DHCP_USE_DOMAINS_YES
) {
3847 if (dhcp_domainname
)
3848 fputs_with_space(f
, dhcp_domainname
, NULL
, &space
);
3850 fputstrv(f
, dhcp_domains
, NULL
, &space
);
3852 fputstrv(f
, dhcp6_domains
, NULL
, &space
);
3854 SET_FOREACH(dd
, link
->ndisc_dnssl
, i
)
3855 fputs_with_space(f
, NDISC_DNSSL_DOMAIN(dd
), NULL
, &space
);
3860 fputs("ROUTE_DOMAINS=", f
);
3862 fputstrv(f
, link
->network
->route_domains
, NULL
, &space
);
3864 if (link
->network
->dhcp_use_domains
== DHCP_USE_DOMAINS_ROUTE
) {
3867 if (dhcp_domainname
)
3868 fputs_with_space(f
, dhcp_domainname
, NULL
, &space
);
3870 fputstrv(f
, dhcp_domains
, NULL
, &space
);
3872 fputstrv(f
, dhcp6_domains
, NULL
, &space
);
3874 SET_FOREACH(dd
, link
->ndisc_dnssl
, i
)
3875 fputs_with_space(f
, NDISC_DNSSL_DOMAIN(dd
), NULL
, &space
);
3880 fprintf(f
, "LLMNR=%s\n",
3881 resolve_support_to_string(link
->network
->llmnr
));
3882 fprintf(f
, "MDNS=%s\n",
3883 resolve_support_to_string(link
->network
->mdns
));
3885 if (link
->network
->dns_over_tls_mode
!= _DNS_OVER_TLS_MODE_INVALID
)
3886 fprintf(f
, "DNS_OVER_TLS=%s\n",
3887 dns_over_tls_mode_to_string(link
->network
->dns_over_tls_mode
));
3889 if (link
->network
->dnssec_mode
!= _DNSSEC_MODE_INVALID
)
3890 fprintf(f
, "DNSSEC=%s\n",
3891 dnssec_mode_to_string(link
->network
->dnssec_mode
));
3893 if (!set_isempty(link
->network
->dnssec_negative_trust_anchors
)) {
3896 fputs("DNSSEC_NTA=", f
);
3898 SET_FOREACH(n
, link
->network
->dnssec_negative_trust_anchors
, i
)
3899 fputs_with_space(f
, n
, NULL
, &space
);
3903 fputs("ADDRESSES=", f
);
3905 SET_FOREACH(a
, link
->addresses
, i
) {
3906 _cleanup_free_
char *address_str
= NULL
;
3908 r
= in_addr_to_string(a
->family
, &a
->in_addr
, &address_str
);
3912 fprintf(f
, "%s%s/%u", space
? " " : "", address_str
, a
->prefixlen
);
3917 fputs("ROUTES=", f
);
3919 SET_FOREACH(route
, link
->routes
, i
) {
3920 _cleanup_free_
char *route_str
= NULL
;
3922 r
= in_addr_to_string(route
->family
, &route
->dst
, &route_str
);
3926 fprintf(f
, "%s%s/%hhu/%hhu/%"PRIu32
"/%"PRIu32
"/"USEC_FMT
,
3927 space
? " " : "", route_str
,
3928 route
->dst_prefixlen
, route
->tos
, route
->priority
, route
->table
, route
->lifetime
);
3935 print_link_hashmap(f
, "CARRIER_BOUND_TO=", link
->bound_to_links
);
3936 print_link_hashmap(f
, "CARRIER_BOUND_BY=", link
->bound_by_links
);
3938 if (link
->dhcp_lease
) {
3939 struct in_addr address
;
3940 const char *tz
= NULL
;
3942 assert(link
->network
);
3944 r
= sd_dhcp_lease_get_timezone(link
->dhcp_lease
, &tz
);
3946 fprintf(f
, "TIMEZONE=%s\n", tz
);
3948 r
= sd_dhcp_lease_get_address(link
->dhcp_lease
, &address
);
3950 fputs("DHCP4_ADDRESS=", f
);
3951 serialize_in_addrs(f
, &address
, 1);
3955 r
= dhcp_lease_save(link
->dhcp_lease
, link
->lease_file
);
3963 unlink(link
->lease_file
);
3966 struct in_addr address
;
3968 r
= sd_ipv4ll_get_address(link
->ipv4ll
, &address
);
3970 fputs("IPV4LL_ADDRESS=", f
);
3971 serialize_in_addrs(f
, &address
, 1);
3976 r
= fflush_and_check(f
);
3980 if (rename(temp_path
, link
->state_file
) < 0) {
3988 (void) unlink(link
->state_file
);
3990 (void) unlink(temp_path
);
3992 return log_link_error_errno(link
, r
, "Failed to save link data to %s: %m", link
->state_file
);
3995 /* The serialized state in /run is no longer up-to-date. */
3996 void link_dirty(Link
*link
) {
4001 /* mark manager dirty as link is dirty */
4002 manager_dirty(link
->manager
);
4004 r
= set_ensure_allocated(&link
->manager
->dirty_links
, NULL
);
4006 /* allocation errors are ignored */
4009 r
= set_put(link
->manager
->dirty_links
, link
);
4011 /* don't take another ref if the link was already dirty */
4017 /* The serialized state in /run is up-to-date */
4018 void link_clean(Link
*link
) {
4020 assert(link
->manager
);
4022 link_unref(set_remove(link
->manager
->dirty_links
, link
));
4025 static const char* const link_state_table
[_LINK_STATE_MAX
] = {
4026 [LINK_STATE_PENDING
] = "pending",
4027 [LINK_STATE_ENSLAVING
] = "configuring",
4028 [LINK_STATE_SETTING_ADDRESSES
] = "configuring",
4029 [LINK_STATE_SETTING_ROUTES
] = "configuring",
4030 [LINK_STATE_CONFIGURED
] = "configured",
4031 [LINK_STATE_UNMANAGED
] = "unmanaged",
4032 [LINK_STATE_FAILED
] = "failed",
4033 [LINK_STATE_LINGER
] = "linger",
4036 DEFINE_STRING_TABLE_LOOKUP(link_state
, LinkState
);
4038 static const char* const link_operstate_table
[_LINK_OPERSTATE_MAX
] = {
4039 [LINK_OPERSTATE_OFF
] = "off",
4040 [LINK_OPERSTATE_NO_CARRIER
] = "no-carrier",
4041 [LINK_OPERSTATE_DORMANT
] = "dormant",
4042 [LINK_OPERSTATE_CARRIER
] = "carrier",
4043 [LINK_OPERSTATE_DEGRADED
] = "degraded",
4044 [LINK_OPERSTATE_ROUTABLE
] = "routable",
4047 DEFINE_STRING_TABLE_LOOKUP(link_operstate
, LinkOperationalState
);