1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 #include <netinet/in.h>
7 #include "alloc-util.h"
9 #include "dhcp-identifier.h"
10 #include "dhcp-lease-internal.h"
14 #include "missing_network.h"
15 #include "netdev/bond.h"
16 #include "netdev/bridge.h"
17 #include "netdev/ipvlan.h"
18 #include "netdev/vrf.h"
19 #include "netlink-util.h"
20 #include "network-internal.h"
21 #include "networkd-can.h"
22 #include "networkd-ipv6-proxy-ndp.h"
23 #include "networkd-lldp-tx.h"
24 #include "networkd-manager.h"
25 #include "networkd-ndisc.h"
26 #include "networkd-neighbor.h"
27 #include "networkd-radv.h"
28 #include "networkd-routing-policy-rule.h"
30 #include "socket-util.h"
31 #include "stdio-util.h"
32 #include "string-table.h"
34 #include "sysctl-util.h"
35 #include "tmpfile-util.h"
36 #include "udev-util.h"
40 uint32_t link_get_vrf_table(Link
*link
) {
41 return link
->network
->vrf
? VRF(link
->network
->vrf
)->table
: RT_TABLE_MAIN
;
44 uint32_t link_get_dhcp_route_table(Link
*link
) {
45 /* When the interface is part of an VRF use the VRFs routing table, unless
46 * another table is explicitly specified. */
47 if (link
->network
->dhcp_route_table_set
)
48 return link
->network
->dhcp_route_table
;
49 return link_get_vrf_table(link
);
52 uint32_t link_get_ipv6_accept_ra_route_table(Link
*link
) {
53 if (link
->network
->ipv6_accept_ra_route_table_set
)
54 return link
->network
->ipv6_accept_ra_route_table
;
55 return link_get_vrf_table(link
);
58 DUID
* link_get_duid(Link
*link
) {
59 if (link
->network
->duid
.type
!= _DUID_TYPE_INVALID
)
60 return &link
->network
->duid
;
62 return &link
->manager
->duid
;
65 static bool link_dhcp6_enabled(Link
*link
) {
68 if (!socket_ipv6_is_supported())
71 if (link
->flags
& IFF_LOOPBACK
)
77 if (link
->network
->bond
)
80 if (STRPTR_IN_SET(link
->kind
, "can", "vcan"))
83 if (manager_sysctl_ipv6_enabled(link
->manager
) == 0)
86 return link
->network
->dhcp
& ADDRESS_FAMILY_IPV6
;
89 static bool link_dhcp4_enabled(Link
*link
) {
92 if (link
->flags
& IFF_LOOPBACK
)
98 if (link
->network
->bond
)
101 if (STRPTR_IN_SET(link
->kind
, "can", "vcan"))
104 return link
->network
->dhcp
& ADDRESS_FAMILY_IPV4
;
107 static bool link_dhcp4_server_enabled(Link
*link
) {
110 if (link
->flags
& IFF_LOOPBACK
)
116 if (link
->network
->bond
)
119 if (STRPTR_IN_SET(link
->kind
, "can", "vcan"))
122 return link
->network
->dhcp_server
;
125 bool link_ipv4ll_enabled(Link
*link
, AddressFamilyBoolean mask
) {
127 assert((mask
& ~(ADDRESS_FAMILY_IPV4
| ADDRESS_FAMILY_FALLBACK_IPV4
)) == 0);
129 if (link
->flags
& IFF_LOOPBACK
)
135 if (STRPTR_IN_SET(link
->kind
, "vrf", "wireguard", "ipip", "gre", "ip6gre", "ip6tnl", "sit", "vti", "vti6", "can", "vcan"))
138 /* L3 or L3S mode do not support ARP. */
139 if (IN_SET(link_get_ipvlan_mode(link
), NETDEV_IPVLAN_MODE_L3
, NETDEV_IPVLAN_MODE_L3S
))
142 if (link
->network
->bond
)
145 return link
->network
->link_local
& mask
;
148 static bool link_ipv6ll_enabled(Link
*link
) {
151 if (!socket_ipv6_is_supported())
154 if (link
->flags
& IFF_LOOPBACK
)
160 if (STRPTR_IN_SET(link
->kind
, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "can", "vcan"))
163 if (link
->network
->bond
)
166 if (manager_sysctl_ipv6_enabled(link
->manager
) == 0)
169 return link
->network
->link_local
& ADDRESS_FAMILY_IPV6
;
172 static bool link_ipv6_enabled(Link
*link
) {
175 if (!socket_ipv6_is_supported())
178 if (link
->network
->bond
)
181 if (manager_sysctl_ipv6_enabled(link
->manager
) == 0)
184 if (STRPTR_IN_SET(link
->kind
, "can", "vcan"))
187 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
188 return link_ipv6ll_enabled(link
) || network_has_static_ipv6_addresses(link
->network
);
191 static bool link_radv_enabled(Link
*link
) {
194 if (!link_ipv6ll_enabled(link
))
197 return link
->network
->router_prefix_delegation
!= RADV_PREFIX_DELEGATION_NONE
;
200 static bool link_ipv4_forward_enabled(Link
*link
) {
203 if (link
->flags
& IFF_LOOPBACK
)
209 if (link
->network
->ip_forward
== _ADDRESS_FAMILY_BOOLEAN_INVALID
)
212 return link
->network
->ip_forward
& ADDRESS_FAMILY_IPV4
;
215 static bool link_ipv6_forward_enabled(Link
*link
) {
218 if (!socket_ipv6_is_supported())
221 if (link
->flags
& IFF_LOOPBACK
)
227 if (link
->network
->ip_forward
== _ADDRESS_FAMILY_BOOLEAN_INVALID
)
230 if (manager_sysctl_ipv6_enabled(link
->manager
) == 0)
233 return link
->network
->ip_forward
& ADDRESS_FAMILY_IPV6
;
236 static bool link_proxy_arp_enabled(Link
*link
) {
239 if (link
->flags
& IFF_LOOPBACK
)
245 if (link
->network
->proxy_arp
< 0)
251 static bool link_ipv6_accept_ra_enabled(Link
*link
) {
254 if (!socket_ipv6_is_supported())
257 if (link
->flags
& IFF_LOOPBACK
)
263 if (!link_ipv6ll_enabled(link
))
266 /* If unset use system default (enabled if local forwarding is disabled.
267 * disabled if local forwarding is enabled).
268 * If set, ignore or enforce RA independent of local forwarding state.
270 if (link
->network
->ipv6_accept_ra
< 0)
271 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
272 return !link_ipv6_forward_enabled(link
);
273 else if (link
->network
->ipv6_accept_ra
> 0)
274 /* accept RA even if ip_forward is enabled */
281 static IPv6PrivacyExtensions
link_ipv6_privacy_extensions(Link
*link
) {
284 if (!socket_ipv6_is_supported())
285 return _IPV6_PRIVACY_EXTENSIONS_INVALID
;
287 if (link
->flags
& IFF_LOOPBACK
)
288 return _IPV6_PRIVACY_EXTENSIONS_INVALID
;
291 return _IPV6_PRIVACY_EXTENSIONS_INVALID
;
293 return link
->network
->ipv6_privacy_extensions
;
296 static int link_enable_ipv6(Link
*link
) {
300 if (link
->flags
& IFF_LOOPBACK
)
303 disabled
= !link_ipv6_enabled(link
);
305 r
= sysctl_write_ip_property_boolean(AF_INET6
, link
->ifname
, "disable_ipv6", disabled
);
307 log_link_warning_errno(link
, r
, "Cannot %s IPv6: %m", enable_disable(!disabled
));
309 log_link_info(link
, "IPv6 successfully %sd", enable_disable(!disabled
));
314 static bool link_is_enslaved(Link
*link
) {
315 if (link
->flags
& IFF_SLAVE
)
316 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
322 if (link
->master_ifindex
> 0 && link
->network
->bridge
)
325 /* TODO: add conditions for other netdevs. */
330 static void link_update_master_operstate(Link
*link
, NetDev
*netdev
) {
336 if (link_get(link
->manager
, netdev
->ifindex
, &master
) < 0)
339 link_update_operstate(master
, true);
342 void link_update_operstate(Link
*link
, bool also_update_master
) {
343 LinkOperationalState operstate
;
348 if (link
->kernel_operstate
== IF_OPER_DORMANT
)
349 operstate
= LINK_OPERSTATE_DORMANT
;
350 else if (link_has_carrier(link
)) {
352 uint8_t scope
= RT_SCOPE_NOWHERE
;
354 /* if we have carrier, check what addresses we have */
355 SET_FOREACH(address
, link
->addresses
, i
) {
356 if (!address_is_ready(address
))
359 if (address
->scope
< scope
)
360 scope
= address
->scope
;
363 /* for operstate we also take foreign addresses into account */
364 SET_FOREACH(address
, link
->addresses_foreign
, i
) {
365 if (!address_is_ready(address
))
368 if (address
->scope
< scope
)
369 scope
= address
->scope
;
372 if (scope
< RT_SCOPE_SITE
)
373 /* universally accessible addresses found */
374 operstate
= LINK_OPERSTATE_ROUTABLE
;
375 else if (scope
< RT_SCOPE_HOST
)
376 /* only link or site local addresses found */
377 operstate
= LINK_OPERSTATE_DEGRADED
;
379 /* no useful addresses found */
380 operstate
= LINK_OPERSTATE_CARRIER
;
381 } else if (link
->flags
& IFF_UP
)
382 operstate
= LINK_OPERSTATE_NO_CARRIER
;
384 operstate
= LINK_OPERSTATE_OFF
;
386 if (IN_SET(operstate
, LINK_OPERSTATE_DEGRADED
, LINK_OPERSTATE_CARRIER
) &&
387 link_is_enslaved(link
))
388 operstate
= LINK_OPERSTATE_ENSLAVED
;
390 if (operstate
>= LINK_OPERSTATE_CARRIER
) {
393 SET_FOREACH(slave
, link
->slaves
, i
) {
394 link_update_operstate(slave
, false);
396 if (slave
->operstate
< LINK_OPERSTATE_CARRIER
)
397 operstate
= LINK_OPERSTATE_DEGRADED_CARRIER
;
401 if (link
->operstate
!= operstate
) {
402 link
->operstate
= operstate
;
403 link_send_changed(link
, "OperationalState", NULL
);
407 if (also_update_master
&& link
->network
) {
408 link_update_master_operstate(link
, link
->network
->bond
);
409 link_update_master_operstate(link
, link
->network
->bridge
);
413 #define FLAG_STRING(string, flag, old, new) \
414 (((old ^ new) & flag) \
415 ? ((old & flag) ? (" -" string) : (" +" string)) \
418 static int link_update_flags(Link
*link
, sd_netlink_message
*m
, bool force_update_operstate
) {
419 unsigned flags
, unknown_flags_added
, unknown_flags_removed
, unknown_flags
;
425 r
= sd_rtnl_message_link_get_flags(m
, &flags
);
427 return log_link_warning_errno(link
, r
, "Could not get link flags: %m");
429 r
= sd_netlink_message_read_u8(m
, IFLA_OPERSTATE
, &operstate
);
431 /* if we got a message without operstate, take it to mean
432 the state was unchanged */
433 operstate
= link
->kernel_operstate
;
435 if (!force_update_operstate
&& (link
->flags
== flags
) && (link
->kernel_operstate
== operstate
))
438 if (link
->flags
!= flags
) {
439 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",
440 FLAG_STRING("LOOPBACK", IFF_LOOPBACK
, link
->flags
, flags
),
441 FLAG_STRING("MASTER", IFF_MASTER
, link
->flags
, flags
),
442 FLAG_STRING("SLAVE", IFF_SLAVE
, link
->flags
, flags
),
443 FLAG_STRING("UP", IFF_UP
, link
->flags
, flags
),
444 FLAG_STRING("DORMANT", IFF_DORMANT
, link
->flags
, flags
),
445 FLAG_STRING("LOWER_UP", IFF_LOWER_UP
, link
->flags
, flags
),
446 FLAG_STRING("RUNNING", IFF_RUNNING
, link
->flags
, flags
),
447 FLAG_STRING("MULTICAST", IFF_MULTICAST
, link
->flags
, flags
),
448 FLAG_STRING("BROADCAST", IFF_BROADCAST
, link
->flags
, flags
),
449 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT
, link
->flags
, flags
),
450 FLAG_STRING("PROMISC", IFF_PROMISC
, link
->flags
, flags
),
451 FLAG_STRING("ALLMULTI", IFF_ALLMULTI
, link
->flags
, flags
),
452 FLAG_STRING("PORTSEL", IFF_PORTSEL
, link
->flags
, flags
),
453 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA
, link
->flags
, flags
),
454 FLAG_STRING("DYNAMIC", IFF_DYNAMIC
, link
->flags
, flags
),
455 FLAG_STRING("NOARP", IFF_NOARP
, link
->flags
, flags
),
456 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS
, link
->flags
, flags
),
457 FLAG_STRING("DEBUG", IFF_DEBUG
, link
->flags
, flags
),
458 FLAG_STRING("ECHO", IFF_ECHO
, link
->flags
, flags
));
460 unknown_flags
= ~(IFF_LOOPBACK
| IFF_MASTER
| IFF_SLAVE
| IFF_UP
|
461 IFF_DORMANT
| IFF_LOWER_UP
| IFF_RUNNING
|
462 IFF_MULTICAST
| IFF_BROADCAST
| IFF_POINTOPOINT
|
463 IFF_PROMISC
| IFF_ALLMULTI
| IFF_PORTSEL
|
464 IFF_AUTOMEDIA
| IFF_DYNAMIC
| IFF_NOARP
|
465 IFF_NOTRAILERS
| IFF_DEBUG
| IFF_ECHO
);
466 unknown_flags_added
= ((link
->flags
^ flags
) & flags
& unknown_flags
);
467 unknown_flags_removed
= ((link
->flags
^ flags
) & link
->flags
& unknown_flags
);
469 /* link flags are currently at most 18 bits, let's align to
471 if (unknown_flags_added
)
473 "Unknown link flags gained: %#.5x (ignoring)",
474 unknown_flags_added
);
476 if (unknown_flags_removed
)
478 "Unknown link flags lost: %#.5x (ignoring)",
479 unknown_flags_removed
);
483 link
->kernel_operstate
= operstate
;
485 link_update_operstate(link
, true);
490 static int link_new(Manager
*manager
, sd_netlink_message
*message
, Link
**ret
) {
491 _cleanup_(link_unrefp
) Link
*link
= NULL
;
493 const char *ifname
, *kind
= NULL
;
495 unsigned short iftype
;
501 /* check for link kind */
502 r
= sd_netlink_message_enter_container(message
, IFLA_LINKINFO
);
504 (void) sd_netlink_message_read_string(message
, IFLA_INFO_KIND
, &kind
);
505 r
= sd_netlink_message_exit_container(message
);
510 r
= sd_netlink_message_get_type(message
, &type
);
513 else if (type
!= RTM_NEWLINK
)
516 r
= sd_rtnl_message_link_get_ifindex(message
, &ifindex
);
519 else if (ifindex
<= 0)
522 r
= sd_rtnl_message_link_get_type(message
, &iftype
);
526 r
= sd_netlink_message_read_string(message
, IFLA_IFNAME
, &ifname
);
537 .state
= LINK_STATE_PENDING
,
538 .rtnl_extended_attrs
= true,
543 link
->ifname
= strdup(ifname
);
548 link
->kind
= strdup(kind
);
553 r
= sd_netlink_message_read_u32(message
, IFLA_MASTER
, (uint32_t *)&link
->master_ifindex
);
555 log_link_debug_errno(link
, r
, "New device has no master, continuing without");
557 r
= sd_netlink_message_read_ether_addr(message
, IFLA_ADDRESS
, &link
->mac
);
559 log_link_debug_errno(link
, r
, "MAC address not found for new device, continuing without");
561 if (asprintf(&link
->state_file
, "/run/systemd/netif/links/%d", link
->ifindex
) < 0)
564 if (asprintf(&link
->lease_file
, "/run/systemd/netif/leases/%d", link
->ifindex
) < 0)
567 if (asprintf(&link
->lldp_file
, "/run/systemd/netif/lldp/%d", link
->ifindex
) < 0)
570 r
= hashmap_ensure_allocated(&manager
->links
, NULL
);
574 r
= hashmap_put(manager
->links
, INT_TO_PTR(link
->ifindex
), link
);
578 r
= link_update_flags(link
, message
, false);
582 *ret
= TAKE_PTR(link
);
587 static Link
*link_free(Link
*link
) {
592 link
->routes
= set_free_with_destructor(link
->routes
, route_free
);
593 link
->routes_foreign
= set_free_with_destructor(link
->routes_foreign
, route_free
);
595 link
->addresses
= set_free_with_destructor(link
->addresses
, address_free
);
596 link
->addresses_foreign
= set_free_with_destructor(link
->addresses_foreign
, address_free
);
598 while ((address
= link
->pool_addresses
)) {
599 LIST_REMOVE(addresses
, link
->pool_addresses
, address
);
600 address_free(address
);
603 sd_dhcp_server_unref(link
->dhcp_server
);
604 sd_dhcp_client_unref(link
->dhcp_client
);
605 sd_dhcp_lease_unref(link
->dhcp_lease
);
607 link_lldp_emit_stop(link
);
609 free(link
->lease_file
);
611 sd_lldp_unref(link
->lldp
);
612 free(link
->lldp_file
);
616 sd_ipv4ll_unref(link
->ipv4ll
);
617 sd_dhcp6_client_unref(link
->dhcp6_client
);
618 sd_ndisc_unref(link
->ndisc
);
619 sd_radv_unref(link
->radv
);
624 (void) unlink(link
->state_file
);
625 free(link
->state_file
);
627 sd_device_unref(link
->sd_device
);
629 hashmap_free(link
->bound_to_links
);
630 hashmap_free(link
->bound_by_links
);
632 set_free_with_destructor(link
->slaves
, link_unref
);
634 network_unref(link
->network
);
639 DEFINE_TRIVIAL_REF_UNREF_FUNC(Link
, link
, link_free
);
641 int link_get(Manager
*m
, int ifindex
, Link
**ret
) {
648 link
= hashmap_get(m
->links
, INT_TO_PTR(ifindex
));
657 void link_set_state(Link
*link
, LinkState state
) {
660 if (link
->state
== state
)
663 log_link_debug(link
, "State changed: %s -> %s",
664 link_state_to_string(link
->state
),
665 link_state_to_string(state
));
669 link_send_changed(link
, "AdministrativeState", NULL
);
672 static void link_enter_unmanaged(Link
*link
) {
675 link_set_state(link
, LINK_STATE_UNMANAGED
);
680 int link_stop_clients(Link
*link
) {
684 assert(link
->manager
);
685 assert(link
->manager
->event
);
687 if (link
->dhcp_client
) {
688 k
= sd_dhcp_client_stop(link
->dhcp_client
);
690 r
= log_link_warning_errno(link
, k
, "Could not stop DHCPv4 client: %m");
694 k
= sd_ipv4ll_stop(link
->ipv4ll
);
696 r
= log_link_warning_errno(link
, k
, "Could not stop IPv4 link-local: %m");
699 if (link
->dhcp6_client
) {
700 k
= sd_dhcp6_client_stop(link
->dhcp6_client
);
702 r
= log_link_warning_errno(link
, k
, "Could not stop DHCPv6 client: %m");
706 k
= sd_ndisc_stop(link
->ndisc
);
708 r
= log_link_warning_errno(link
, k
, "Could not stop IPv6 Router Discovery: %m");
712 k
= sd_radv_stop(link
->radv
);
714 r
= log_link_warning_errno(link
, k
, "Could not stop IPv6 Router Advertisement: %m");
717 link_lldp_emit_stop(link
);
721 void link_enter_failed(Link
*link
) {
724 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
727 log_link_warning(link
, "Failed");
729 link_set_state(link
, LINK_STATE_FAILED
);
731 link_stop_clients(link
);
736 static Address
* link_find_dhcp_server_address(Link
*link
) {
740 assert(link
->network
);
742 /* The first statically configured address if there is any */
743 LIST_FOREACH(addresses
, address
, link
->network
->static_addresses
) {
745 if (address
->family
!= AF_INET
)
748 if (in_addr_is_null(address
->family
, &address
->in_addr
))
754 /* If that didn't work, find a suitable address we got from the pool */
755 LIST_FOREACH(addresses
, address
, link
->pool_addresses
) {
756 if (address
->family
!= AF_INET
)
765 static int link_join_netdevs_after_configured(Link
*link
) {
770 HASHMAP_FOREACH(netdev
, link
->network
->stacked_netdevs
, i
) {
771 if (netdev
->ifindex
> 0)
772 /* Assume already enslaved. */
775 if (netdev_get_create_type(netdev
) != NETDEV_CREATE_AFTER_CONFIGURED
)
778 log_struct(LOG_DEBUG
,
779 LOG_LINK_INTERFACE(link
),
780 LOG_NETDEV_INTERFACE(netdev
),
781 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", netdev
->ifname
));
783 r
= netdev_join(netdev
, link
, NULL
);
785 return log_struct_errno(LOG_WARNING
, r
,
786 LOG_LINK_INTERFACE(link
),
787 LOG_NETDEV_INTERFACE(netdev
),
788 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", netdev
->ifname
));
794 static void link_enter_configured(Link
*link
) {
796 assert(link
->network
);
798 if (link
->state
!= LINK_STATE_CONFIGURING
)
801 log_link_info(link
, "Configured");
803 link_set_state(link
, LINK_STATE_CONFIGURED
);
805 (void) link_join_netdevs_after_configured(link
);
810 static int link_request_set_routing_policy_rule(Link
*link
) {
811 RoutingPolicyRule
*rule
, *rrule
= NULL
;
815 assert(link
->network
);
817 link_set_state(link
, LINK_STATE_CONFIGURING
);
818 link
->routing_policy_rules_configured
= false;
820 LIST_FOREACH(rules
, rule
, link
->network
->rules
) {
821 r
= routing_policy_rule_get(link
->manager
, rule
->family
, &rule
->from
, rule
->from_prefixlen
, &rule
->to
,
822 rule
->to_prefixlen
, rule
->tos
, rule
->fwmark
, rule
->table
, rule
->iif
, rule
->oif
,
823 rule
->protocol
, &rule
->sport
, &rule
->dport
, &rrule
);
825 (void) routing_policy_rule_make_local(link
->manager
, rrule
);
829 r
= routing_policy_rule_configure(rule
, link
, NULL
, false);
831 log_link_warning_errno(link
, r
, "Could not set routing policy rules: %m");
832 link_enter_failed(link
);
836 link
->routing_policy_rule_messages
++;
839 routing_policy_rule_purge(link
->manager
, link
);
840 if (link
->routing_policy_rule_messages
== 0) {
841 link
->routing_policy_rules_configured
= true;
842 link_check_ready(link
);
844 log_link_debug(link
, "Setting routing policy rules");
849 static int route_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
853 assert(link
->route_messages
> 0);
854 assert(IN_SET(link
->state
, LINK_STATE_CONFIGURING
,
855 LINK_STATE_FAILED
, LINK_STATE_LINGER
));
857 link
->route_messages
--;
859 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
862 r
= sd_netlink_message_get_errno(m
);
863 if (r
< 0 && r
!= -EEXIST
)
864 log_link_warning_errno(link
, r
, "Could not set route: %m");
866 if (link
->route_messages
== 0) {
867 log_link_debug(link
, "Routes set");
868 link
->static_routes_configured
= true;
869 link_check_ready(link
);
875 int link_request_set_routes(Link
*link
) {
877 PHASE_NON_GATEWAY
, /* First phase: Routes without a gateway */
878 PHASE_GATEWAY
, /* Second phase: Routes with a gateway */
885 assert(link
->network
);
886 assert(link
->addresses_configured
);
887 assert(link
->address_messages
== 0);
888 assert(link
->state
!= _LINK_STATE_INVALID
);
890 link_set_state(link
, LINK_STATE_CONFIGURING
);
891 link
->static_routes_configured
= false;
893 r
= link_request_set_routing_policy_rule(link
);
897 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
898 for (phase
= 0; phase
< _PHASE_MAX
; phase
++)
899 LIST_FOREACH(routes
, rt
, link
->network
->static_routes
) {
901 if (in_addr_is_null(rt
->family
, &rt
->gw
) != (phase
== PHASE_NON_GATEWAY
))
904 r
= route_configure(rt
, link
, route_handler
);
906 log_link_warning_errno(link
, r
, "Could not set routes: %m");
907 link_enter_failed(link
);
911 link
->route_messages
++;
914 if (link
->route_messages
== 0) {
915 link
->static_routes_configured
= true;
916 link_check_ready(link
);
918 log_link_debug(link
, "Setting routes");
923 void link_check_ready(Link
*link
) {
929 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
935 if (!link
->addresses_configured
)
938 if (!link
->neighbors_configured
)
941 SET_FOREACH(a
, link
->addresses
, i
)
942 if (!address_is_ready(a
))
945 if (!link
->addresses_ready
) {
946 link
->addresses_ready
= true;
947 link_request_set_routes(link
);
951 if (!link
->static_routes_configured
)
954 if (!link
->routing_policy_rules_configured
)
957 if (link_ipv4ll_enabled(link
, ADDRESS_FAMILY_IPV4
) && !(link
->ipv4ll_address
&& link
->ipv4ll_route
))
960 if (link_ipv6ll_enabled(link
) &&
961 in_addr_is_null(AF_INET6
, (const union in_addr_union
*) &link
->ipv6ll_address
))
964 if ((link_dhcp4_enabled(link
) || link_dhcp6_enabled(link
)) &&
965 !(link
->dhcp4_configured
|| link
->dhcp6_configured
) &&
966 !(link_ipv4ll_enabled(link
, ADDRESS_FAMILY_FALLBACK_IPV4
) && link
->ipv4ll_address
&& link
->ipv4ll_route
))
967 /* When DHCP is enabled, at least one protocol must provide an address, or
968 * an IPv4ll fallback address must be configured. */
971 if (link_ipv6_accept_ra_enabled(link
) && !link
->ndisc_configured
)
974 if (link
->state
!= LINK_STATE_CONFIGURED
)
975 link_enter_configured(link
);
980 static int link_request_set_neighbors(Link
*link
) {
985 assert(link
->network
);
986 assert(link
->state
!= _LINK_STATE_INVALID
);
988 link_set_state(link
, LINK_STATE_CONFIGURING
);
989 link
->neighbors_configured
= false;
991 LIST_FOREACH(neighbors
, neighbor
, link
->network
->neighbors
) {
992 r
= neighbor_configure(neighbor
, link
, NULL
);
994 log_link_warning_errno(link
, r
, "Could not set neighbor: %m");
995 link_enter_failed(link
);
1000 if (link
->neighbor_messages
== 0) {
1001 link
->neighbors_configured
= true;
1002 link_check_ready(link
);
1004 log_link_debug(link
, "Setting neighbors");
1009 static int address_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1015 assert(link
->ifname
);
1016 assert(link
->address_messages
> 0);
1017 assert(IN_SET(link
->state
, LINK_STATE_CONFIGURING
,
1018 LINK_STATE_FAILED
, LINK_STATE_LINGER
));
1020 link
->address_messages
--;
1022 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1025 r
= sd_netlink_message_get_errno(m
);
1026 if (r
< 0 && r
!= -EEXIST
)
1027 log_link_warning_errno(link
, r
, "could not set address: %m");
1029 manager_rtnl_process_address(rtnl
, m
, link
->manager
);
1031 if (link
->address_messages
== 0) {
1032 log_link_debug(link
, "Addresses set");
1033 link
->addresses_configured
= true;
1034 link_check_ready(link
);
1040 static int link_push_uplink_dns_to_dhcp_server(Link
*link
, sd_dhcp_server
*s
) {
1041 _cleanup_free_
struct in_addr
*addresses
= NULL
;
1042 size_t n_addresses
= 0, n_allocated
= 0;
1045 log_debug("Copying DNS server information from %s", link
->ifname
);
1050 for (i
= 0; i
< link
->network
->n_dns
; i
++) {
1053 /* Only look for IPv4 addresses */
1054 if (link
->network
->dns
[i
].family
!= AF_INET
)
1057 ia
= link
->network
->dns
[i
].address
.in
;
1059 /* Never propagate obviously borked data */
1060 if (in4_addr_is_null(&ia
) || in4_addr_is_localhost(&ia
))
1063 if (!GREEDY_REALLOC(addresses
, n_allocated
, n_addresses
+ 1))
1066 addresses
[n_addresses
++] = ia
;
1069 if (link
->network
->dhcp_use_dns
&& link
->dhcp_lease
) {
1070 const struct in_addr
*da
= NULL
;
1073 n
= sd_dhcp_lease_get_dns(link
->dhcp_lease
, &da
);
1076 if (!GREEDY_REALLOC(addresses
, n_allocated
, n_addresses
+ n
))
1079 for (j
= 0; j
< n
; j
++)
1080 if (in4_addr_is_non_local(&da
[j
]))
1081 addresses
[n_addresses
++] = da
[j
];
1085 if (n_addresses
<= 0)
1088 return sd_dhcp_server_set_dns(s
, addresses
, n_addresses
);
1091 static int link_push_uplink_ntp_to_dhcp_server(Link
*link
, sd_dhcp_server
*s
) {
1092 _cleanup_free_
struct in_addr
*addresses
= NULL
;
1093 size_t n_addresses
= 0, n_allocated
= 0;
1099 log_debug("Copying NTP server information from %s", link
->ifname
);
1101 STRV_FOREACH(a
, link
->network
->ntp
) {
1102 union in_addr_union ia
;
1104 /* Only look for IPv4 addresses */
1105 if (in_addr_from_string(AF_INET
, *a
, &ia
) <= 0)
1108 /* Never propagate obviously borked data */
1109 if (in4_addr_is_null(&ia
.in
) || in4_addr_is_localhost(&ia
.in
))
1112 if (!GREEDY_REALLOC(addresses
, n_allocated
, n_addresses
+ 1))
1115 addresses
[n_addresses
++] = ia
.in
;
1118 if (link
->network
->dhcp_use_ntp
&& link
->dhcp_lease
) {
1119 const struct in_addr
*da
= NULL
;
1122 n
= sd_dhcp_lease_get_ntp(link
->dhcp_lease
, &da
);
1125 if (!GREEDY_REALLOC(addresses
, n_allocated
, n_addresses
+ n
))
1128 for (j
= 0; j
< n
; j
++)
1129 if (in4_addr_is_non_local(&da
[j
]))
1130 addresses
[n_addresses
++] = da
[j
];
1134 if (n_addresses
<= 0)
1137 return sd_dhcp_server_set_ntp(s
, addresses
, n_addresses
);
1140 static int link_set_bridge_fdb(Link
*link
) {
1141 FdbEntry
*fdb_entry
;
1144 LIST_FOREACH(static_fdb_entries
, fdb_entry
, link
->network
->static_fdb_entries
) {
1145 r
= fdb_entry_configure(link
, fdb_entry
);
1147 return log_link_error_errno(link
, r
, "Failed to add MAC entry to static MAC table: %m");
1153 static int link_request_set_addresses(Link
*link
) {
1154 AddressLabel
*label
;
1159 assert(link
->network
);
1160 assert(link
->state
!= _LINK_STATE_INVALID
);
1162 link_set_state(link
, LINK_STATE_CONFIGURING
);
1164 /* Reset all *_configured flags we are configuring. */
1165 link
->addresses_configured
= false;
1166 link
->addresses_ready
= false;
1167 link
->neighbors_configured
= false;
1168 link
->static_routes_configured
= false;
1169 link
->routing_policy_rules_configured
= false;
1171 r
= link_set_bridge_fdb(link
);
1175 r
= link_request_set_neighbors(link
);
1179 LIST_FOREACH(addresses
, ad
, link
->network
->static_addresses
) {
1182 update
= address_get(link
, ad
->family
, &ad
->in_addr
, ad
->prefixlen
, NULL
) > 0;
1184 r
= address_configure(ad
, link
, address_handler
, update
);
1186 log_link_warning_errno(link
, r
, "Could not set addresses: %m");
1187 link_enter_failed(link
);
1191 link
->address_messages
++;
1194 LIST_FOREACH(labels
, label
, link
->network
->address_labels
) {
1195 r
= address_label_configure(label
, link
, NULL
, false);
1197 log_link_warning_errno(link
, r
, "Could not set address label: %m");
1198 link_enter_failed(link
);
1202 link
->address_label_messages
++;
1205 /* now that we can figure out a default address for the dhcp server,
1207 if (link_dhcp4_server_enabled(link
) && (link
->flags
& IFF_UP
)) {
1209 Link
*uplink
= NULL
;
1210 bool acquired_uplink
= false;
1212 address
= link_find_dhcp_server_address(link
);
1214 log_link_warning(link
, "Failed to find suitable address for DHCPv4 server instance.");
1215 link_enter_failed(link
);
1219 /* use the server address' subnet as the pool */
1220 r
= sd_dhcp_server_configure_pool(link
->dhcp_server
, &address
->in_addr
.in
, address
->prefixlen
,
1221 link
->network
->dhcp_server_pool_offset
, link
->network
->dhcp_server_pool_size
);
1226 r = sd_dhcp_server_set_router(link->dhcp_server,
1227 &main_address->in_addr.in);
1232 if (link
->network
->dhcp_server_max_lease_time_usec
> 0) {
1233 r
= sd_dhcp_server_set_max_lease_time(
1235 DIV_ROUND_UP(link
->network
->dhcp_server_max_lease_time_usec
, USEC_PER_SEC
));
1240 if (link
->network
->dhcp_server_default_lease_time_usec
> 0) {
1241 r
= sd_dhcp_server_set_default_lease_time(
1243 DIV_ROUND_UP(link
->network
->dhcp_server_default_lease_time_usec
, USEC_PER_SEC
));
1248 if (link
->network
->dhcp_server_emit_dns
) {
1250 if (link
->network
->n_dhcp_server_dns
> 0)
1251 r
= sd_dhcp_server_set_dns(link
->dhcp_server
, link
->network
->dhcp_server_dns
, link
->network
->n_dhcp_server_dns
);
1253 uplink
= manager_find_uplink(link
->manager
, link
);
1254 acquired_uplink
= true;
1257 log_link_debug(link
, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1260 r
= link_push_uplink_dns_to_dhcp_server(uplink
, link
->dhcp_server
);
1263 log_link_warning_errno(link
, r
, "Failed to set DNS server for DHCP server, ignoring: %m");
1266 if (link
->network
->dhcp_server_emit_ntp
) {
1268 if (link
->network
->n_dhcp_server_ntp
> 0)
1269 r
= sd_dhcp_server_set_ntp(link
->dhcp_server
, link
->network
->dhcp_server_ntp
, link
->network
->n_dhcp_server_ntp
);
1271 if (!acquired_uplink
)
1272 uplink
= manager_find_uplink(link
->manager
, link
);
1275 log_link_debug(link
, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1278 r
= link_push_uplink_ntp_to_dhcp_server(uplink
, link
->dhcp_server
);
1282 log_link_warning_errno(link
, r
, "Failed to set NTP server for DHCP server, ignoring: %m");
1285 r
= sd_dhcp_server_set_emit_router(link
->dhcp_server
, link
->network
->dhcp_server_emit_router
);
1287 return log_link_warning_errno(link
, r
, "Failed to set router emission for DHCP server: %m");
1289 if (link
->network
->dhcp_server_emit_timezone
) {
1290 _cleanup_free_
char *buffer
= NULL
;
1291 const char *tz
= NULL
;
1293 if (link
->network
->dhcp_server_timezone
)
1294 tz
= link
->network
->dhcp_server_timezone
;
1296 r
= get_timezone(&buffer
);
1298 log_warning_errno(r
, "Failed to determine timezone: %m");
1304 r
= sd_dhcp_server_set_timezone(link
->dhcp_server
, tz
);
1309 if (!sd_dhcp_server_is_running(link
->dhcp_server
)) {
1310 r
= sd_dhcp_server_start(link
->dhcp_server
);
1312 log_link_warning_errno(link
, r
, "Could not start DHCPv4 server instance: %m");
1314 link_enter_failed(link
);
1320 log_link_debug(link
, "Offering DHCPv4 leases");
1323 if (link
->address_messages
== 0) {
1324 link
->addresses_configured
= true;
1325 link_check_ready(link
);
1327 log_link_debug(link
, "Setting addresses");
1332 static int link_set_bridge_vlan(Link
*link
) {
1335 r
= br_vlan_configure(link
, link
->network
->pvid
, link
->network
->br_vid_bitmap
, link
->network
->br_untagged_bitmap
);
1337 log_link_error_errno(link
, r
, "Failed to assign VLANs to bridge port: %m");
1342 static int link_set_proxy_arp(Link
*link
) {
1345 if (!link_proxy_arp_enabled(link
))
1348 r
= sysctl_write_ip_property_boolean(AF_INET
, link
->ifname
, "proxy_arp", link
->network
->proxy_arp
> 0);
1350 log_link_warning_errno(link
, r
, "Cannot configure proxy ARP for interface: %m");
1355 static int link_configure_after_setting_mtu(Link
*link
);
1357 static int set_mtu_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1362 assert(link
->ifname
);
1364 link
->setting_mtu
= false;
1366 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1369 r
= sd_netlink_message_get_errno(m
);
1371 log_link_warning_errno(link
, r
, "Could not set MTU: %m");
1375 log_link_debug(link
, "Setting MTU done.");
1377 if (link
->state
== LINK_STATE_INITIALIZED
)
1378 (void) link_configure_after_setting_mtu(link
);
1383 int link_set_mtu(Link
*link
, uint32_t mtu
) {
1384 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1388 assert(link
->manager
);
1389 assert(link
->manager
->rtnl
);
1391 if (mtu
== 0 || link
->setting_mtu
)
1394 if (link
->mtu
== mtu
)
1397 log_link_debug(link
, "Setting MTU: %" PRIu32
, mtu
);
1399 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1401 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1403 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
1404 * for this interface, then disable IPv6 else enable it. */
1405 (void) link_enable_ipv6(link
);
1407 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
1408 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1409 if (link_ipv6_enabled(link
) && mtu
< IPV6_MIN_MTU
) {
1411 log_link_warning(link
, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU
) ", as "
1412 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU
) " bytes: %m");
1417 r
= sd_netlink_message_append_u32(req
, IFLA_MTU
, mtu
);
1419 return log_link_error_errno(link
, r
, "Could not append MTU: %m");
1421 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, set_mtu_handler
,
1422 link_netlink_destroy_callback
, link
);
1424 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1427 link
->setting_mtu
= true;
1432 static bool link_reduces_vlan_mtu(Link
*link
) {
1433 /* See netif_reduces_vlan_mtu() in kernel. */
1434 return streq_ptr(link
->kind
, "macsec");
1437 static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link
*link
) {
1442 HASHMAP_FOREACH(dev
, link
->network
->stacked_netdevs
, i
)
1443 if (dev
->kind
== NETDEV_KIND_VLAN
&& dev
->mtu
> 0)
1444 /* See vlan_dev_change_mtu() in kernel. */
1445 mtu
= MAX(mtu
, link_reduces_vlan_mtu(link
) ? dev
->mtu
+ 4 : dev
->mtu
);
1447 else if (dev
->kind
== NETDEV_KIND_MACVLAN
&& dev
->mtu
> mtu
)
1448 /* See macvlan_change_mtu() in kernel. */
1454 static int link_configure_mtu(Link
*link
) {
1458 assert(link
->network
);
1460 if (link
->network
->mtu
> 0)
1461 return link_set_mtu(link
, link
->network
->mtu
);
1463 mtu
= link_get_requested_mtu_by_stacked_netdevs(link
);
1464 if (link
->mtu
>= mtu
)
1467 log_link_notice(link
, "Bumping MTU bytes from %"PRIu32
" to %"PRIu32
" because of stacked device. "
1468 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1471 return link_set_mtu(link
, mtu
);
1474 static int set_flags_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1479 assert(link
->ifname
);
1481 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1484 r
= sd_netlink_message_get_errno(m
);
1486 log_link_warning_errno(link
, r
, "Could not set link flags: %m");
1491 static int link_set_flags(Link
*link
) {
1492 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1493 unsigned ifi_change
= 0;
1494 unsigned ifi_flags
= 0;
1498 assert(link
->manager
);
1499 assert(link
->manager
->rtnl
);
1501 if (link
->flags
& IFF_LOOPBACK
)
1507 if (link
->network
->arp
< 0 && link
->network
->multicast
< 0 && link
->network
->allmulticast
< 0)
1510 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1512 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1514 if (link
->network
->arp
>= 0) {
1515 ifi_change
|= IFF_NOARP
;
1516 SET_FLAG(ifi_flags
, IFF_NOARP
, link
->network
->arp
== 0);
1519 if (link
->network
->multicast
>= 0) {
1520 ifi_change
|= IFF_MULTICAST
;
1521 SET_FLAG(ifi_flags
, IFF_MULTICAST
, link
->network
->multicast
);
1524 if (link
->network
->allmulticast
>= 0) {
1525 ifi_change
|= IFF_ALLMULTI
;
1526 SET_FLAG(ifi_flags
, IFF_ALLMULTI
, link
->network
->allmulticast
);
1529 r
= sd_rtnl_message_link_set_flags(req
, ifi_flags
, ifi_change
);
1531 return log_link_error_errno(link
, r
, "Could not set link flags: %m");
1533 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, set_flags_handler
,
1534 link_netlink_destroy_callback
, link
);
1536 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1543 static int link_acquire_ipv6_conf(Link
*link
) {
1548 if (link_ipv6_accept_ra_enabled(link
)) {
1549 assert(link
->ndisc
);
1551 log_link_debug(link
, "Discovering IPv6 routers");
1553 r
= sd_ndisc_start(link
->ndisc
);
1554 if (r
< 0 && r
!= -EBUSY
)
1555 return log_link_warning_errno(link
, r
, "Could not start IPv6 Router Discovery: %m");
1558 if (link_radv_enabled(link
)) {
1560 assert(in_addr_is_link_local(AF_INET6
, (const union in_addr_union
*)&link
->ipv6ll_address
) > 0);
1562 log_link_debug(link
, "Starting IPv6 Router Advertisements");
1564 r
= sd_radv_start(link
->radv
);
1565 if (r
< 0 && r
!= -EBUSY
)
1566 return log_link_warning_errno(link
, r
, "Could not start IPv6 Router Advertisement: %m");
1569 (void) dhcp6_request_prefix_delegation(link
);
1574 static int link_acquire_ipv4_conf(Link
*link
) {
1578 assert(link
->manager
);
1579 assert(link
->manager
->event
);
1581 if (link_ipv4ll_enabled(link
, ADDRESS_FAMILY_IPV4
)) {
1582 assert(link
->ipv4ll
);
1584 log_link_debug(link
, "Acquiring IPv4 link-local address");
1586 r
= sd_ipv4ll_start(link
->ipv4ll
);
1588 return log_link_warning_errno(link
, r
, "Could not acquire IPv4 link-local address: %m");
1591 if (link_dhcp4_enabled(link
)) {
1592 assert(link
->dhcp_client
);
1594 log_link_debug(link
, "Acquiring DHCPv4 lease");
1596 r
= sd_dhcp_client_start(link
->dhcp_client
);
1598 return log_link_warning_errno(link
, r
, "Could not acquire DHCPv4 lease: %m");
1604 static int link_acquire_conf(Link
*link
) {
1609 r
= link_acquire_ipv4_conf(link
);
1613 if (!in_addr_is_null(AF_INET6
, (const union in_addr_union
*) &link
->ipv6ll_address
)) {
1614 r
= link_acquire_ipv6_conf(link
);
1619 if (link_lldp_emit_enabled(link
)) {
1620 r
= link_lldp_emit_start(link
);
1622 return log_link_warning_errno(link
, r
, "Failed to start LLDP transmission: %m");
1628 bool link_has_carrier(Link
*link
) {
1629 /* see Documentation/networking/operstates.txt in the kernel sources */
1631 if (link
->kernel_operstate
== IF_OPER_UP
)
1634 if (link
->kernel_operstate
== IF_OPER_UNKNOWN
)
1635 /* operstate may not be implemented, so fall back to flags */
1636 if (FLAGS_SET(link
->flags
, IFF_LOWER_UP
| IFF_RUNNING
) &&
1637 !FLAGS_SET(link
->flags
, IFF_DORMANT
))
1643 static int link_address_genmode_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1648 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1651 r
= sd_netlink_message_get_errno(m
);
1653 log_link_warning_errno(link
, r
, "Could not set address genmode for interface: %m");
1658 static int link_configure_addrgen_mode(Link
*link
) {
1659 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1660 uint8_t ipv6ll_mode
;
1664 assert(link
->network
);
1665 assert(link
->manager
);
1666 assert(link
->manager
->rtnl
);
1668 if (!socket_ipv6_is_supported())
1671 log_link_debug(link
, "Setting address genmode for link");
1673 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1675 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1677 r
= sd_netlink_message_open_container(req
, IFLA_AF_SPEC
);
1679 return log_link_error_errno(link
, r
, "Could not open IFLA_AF_SPEC container: %m");
1681 r
= sd_netlink_message_open_container(req
, AF_INET6
);
1683 return log_link_error_errno(link
, r
, "Could not open AF_INET6 container: %m");
1685 if (!link_ipv6ll_enabled(link
))
1686 ipv6ll_mode
= IN6_ADDR_GEN_MODE_NONE
;
1687 else if (sysctl_read_ip_property(AF_INET6
, link
->ifname
, "stable_secret", NULL
) < 0)
1688 /* The file may not exist. And event if it exists, when stable_secret is unset,
1689 * reading the file fails with EIO. */
1690 ipv6ll_mode
= IN6_ADDR_GEN_MODE_EUI64
;
1692 ipv6ll_mode
= IN6_ADDR_GEN_MODE_STABLE_PRIVACY
;
1694 r
= sd_netlink_message_append_u8(req
, IFLA_INET6_ADDR_GEN_MODE
, ipv6ll_mode
);
1696 return log_link_error_errno(link
, r
, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1698 r
= sd_netlink_message_close_container(req
);
1700 return log_link_error_errno(link
, r
, "Could not close AF_INET6 container: %m");
1702 r
= sd_netlink_message_close_container(req
);
1704 return log_link_error_errno(link
, r
, "Could not close IFLA_AF_SPEC container: %m");
1706 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, link_address_genmode_handler
,
1707 link_netlink_destroy_callback
, link
);
1709 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1716 static int link_up_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1721 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1724 r
= sd_netlink_message_get_errno(m
);
1726 /* we warn but don't fail the link, as it may be brought up later */
1727 log_link_warning_errno(link
, r
, "Could not bring up interface: %m");
1732 static int link_up(Link
*link
) {
1733 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1737 assert(link
->network
);
1738 assert(link
->manager
);
1739 assert(link
->manager
->rtnl
);
1741 log_link_debug(link
, "Bringing link up");
1743 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1745 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1747 /* set it free if not enslaved with networkd */
1748 if (!link
->network
->bridge
&& !link
->network
->bond
&& !link
->network
->vrf
) {
1749 r
= sd_netlink_message_append_u32(req
, IFLA_MASTER
, 0);
1751 return log_link_error_errno(link
, r
, "Could not append IFLA_MASTER attribute: %m");
1754 r
= sd_rtnl_message_link_set_flags(req
, IFF_UP
, IFF_UP
);
1756 return log_link_error_errno(link
, r
, "Could not set link flags: %m");
1758 if (link
->network
->mac
) {
1759 r
= sd_netlink_message_append_ether_addr(req
, IFLA_ADDRESS
, link
->network
->mac
);
1761 return log_link_error_errno(link
, r
, "Could not set MAC address: %m");
1764 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, link_up_handler
,
1765 link_netlink_destroy_callback
, link
);
1767 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1774 static int link_down_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1779 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1782 r
= sd_netlink_message_get_errno(m
);
1784 log_link_warning_errno(link
, r
, "Could not bring down interface: %m");
1789 int link_down(Link
*link
, link_netlink_message_handler_t callback
) {
1790 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1794 assert(link
->manager
);
1795 assert(link
->manager
->rtnl
);
1797 log_link_debug(link
, "Bringing link down");
1799 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
,
1800 RTM_SETLINK
, link
->ifindex
);
1802 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1804 r
= sd_rtnl_message_link_set_flags(req
, 0, IFF_UP
);
1806 return log_link_error_errno(link
, r
, "Could not set link flags: %m");
1808 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
,
1809 callback
?: link_down_handler
,
1810 link_netlink_destroy_callback
, link
);
1812 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1819 static int link_handle_bound_to_list(Link
*link
) {
1823 bool required_up
= false;
1824 bool link_is_up
= false;
1828 if (hashmap_isempty(link
->bound_to_links
))
1831 if (link
->flags
& IFF_UP
)
1834 HASHMAP_FOREACH (l
, link
->bound_to_links
, i
)
1835 if (link_has_carrier(l
)) {
1840 if (!required_up
&& link_is_up
) {
1841 r
= link_down(link
, NULL
);
1844 } else if (required_up
&& !link_is_up
) {
1853 static int link_handle_bound_by_list(Link
*link
) {
1860 if (hashmap_isempty(link
->bound_by_links
))
1863 HASHMAP_FOREACH (l
, link
->bound_by_links
, i
) {
1864 r
= link_handle_bound_to_list(l
);
1872 static int link_put_carrier(Link
*link
, Link
*carrier
, Hashmap
**h
) {
1878 if (link
== carrier
)
1881 if (hashmap_get(*h
, INT_TO_PTR(carrier
->ifindex
)))
1884 r
= hashmap_ensure_allocated(h
, NULL
);
1888 r
= hashmap_put(*h
, INT_TO_PTR(carrier
->ifindex
), carrier
);
1895 static int link_new_bound_by_list(Link
*link
) {
1900 bool list_updated
= false;
1903 assert(link
->manager
);
1907 HASHMAP_FOREACH(carrier
, m
->links
, i
) {
1908 if (!carrier
->network
)
1911 if (strv_isempty(carrier
->network
->bind_carrier
))
1914 if (strv_fnmatch(carrier
->network
->bind_carrier
, link
->ifname
, 0)) {
1915 r
= link_put_carrier(link
, carrier
, &link
->bound_by_links
);
1919 list_updated
= true;
1926 HASHMAP_FOREACH(carrier
, link
->bound_by_links
, i
) {
1927 r
= link_put_carrier(carrier
, link
, &carrier
->bound_to_links
);
1931 link_dirty(carrier
);
1937 static int link_new_bound_to_list(Link
*link
) {
1942 bool list_updated
= false;
1945 assert(link
->manager
);
1950 if (strv_isempty(link
->network
->bind_carrier
))
1955 HASHMAP_FOREACH (carrier
, m
->links
, i
) {
1956 if (strv_fnmatch(link
->network
->bind_carrier
, carrier
->ifname
, 0)) {
1957 r
= link_put_carrier(link
, carrier
, &link
->bound_to_links
);
1961 list_updated
= true;
1968 HASHMAP_FOREACH (carrier
, link
->bound_to_links
, i
) {
1969 r
= link_put_carrier(carrier
, link
, &carrier
->bound_by_links
);
1973 link_dirty(carrier
);
1979 static int link_new_carrier_maps(Link
*link
) {
1982 r
= link_new_bound_by_list(link
);
1986 r
= link_handle_bound_by_list(link
);
1990 r
= link_new_bound_to_list(link
);
1994 r
= link_handle_bound_to_list(link
);
2001 static void link_free_bound_to_list(Link
*link
) {
2005 HASHMAP_FOREACH (bound_to
, link
->bound_to_links
, i
) {
2006 hashmap_remove(link
->bound_to_links
, INT_TO_PTR(bound_to
->ifindex
));
2008 if (hashmap_remove(bound_to
->bound_by_links
, INT_TO_PTR(link
->ifindex
)))
2009 link_dirty(bound_to
);
2015 static void link_free_bound_by_list(Link
*link
) {
2019 HASHMAP_FOREACH (bound_by
, link
->bound_by_links
, i
) {
2020 hashmap_remove(link
->bound_by_links
, INT_TO_PTR(bound_by
->ifindex
));
2022 if (hashmap_remove(bound_by
->bound_to_links
, INT_TO_PTR(link
->ifindex
))) {
2023 link_dirty(bound_by
);
2024 link_handle_bound_to_list(bound_by
);
2031 static void link_free_carrier_maps(Link
*link
) {
2032 bool list_updated
= false;
2036 if (!hashmap_isempty(link
->bound_to_links
)) {
2037 link_free_bound_to_list(link
);
2038 list_updated
= true;
2041 if (!hashmap_isempty(link
->bound_by_links
)) {
2042 link_free_bound_by_list(link
);
2043 list_updated
= true;
2052 static int link_append_to_master(Link
*link
, NetDev
*netdev
) {
2059 r
= link_get(link
->manager
, netdev
->ifindex
, &master
);
2063 r
= set_ensure_allocated(&master
->slaves
, NULL
);
2067 r
= set_put(master
->slaves
, link
);
2075 static void link_drop_from_master(Link
*link
, NetDev
*netdev
) {
2080 if (!link
->manager
|| !netdev
)
2083 if (link_get(link
->manager
, netdev
->ifindex
, &master
) < 0)
2086 link_unref(set_remove(master
->slaves
, link
));
2089 static void link_detach_from_manager(Link
*link
) {
2090 if (!link
|| !link
->manager
)
2093 link_unref(set_remove(link
->manager
->links_requesting_uuid
, link
));
2096 /* The following must be called at last. */
2097 assert_se(hashmap_remove(link
->manager
->links
, INT_TO_PTR(link
->ifindex
)) == link
);
2101 void link_drop(Link
*link
) {
2102 if (!link
|| link
->state
== LINK_STATE_LINGER
)
2105 link_set_state(link
, LINK_STATE_LINGER
);
2107 link_free_carrier_maps(link
);
2109 if (link
->network
) {
2110 link_drop_from_master(link
, link
->network
->bridge
);
2111 link_drop_from_master(link
, link
->network
->bond
);
2114 log_link_debug(link
, "Link removed");
2116 (void) unlink(link
->state_file
);
2117 link_detach_from_manager(link
);
2120 static int link_joined(Link
*link
) {
2124 assert(link
->network
);
2126 if (!hashmap_isempty(link
->bound_to_links
)) {
2127 r
= link_handle_bound_to_list(link
);
2130 } else if (!(link
->flags
& IFF_UP
)) {
2133 link_enter_failed(link
);
2138 if (link
->network
->bridge
) {
2139 r
= link_set_bridge(link
);
2141 log_link_error_errno(link
, r
, "Could not set bridge message: %m");
2143 r
= link_append_to_master(link
, link
->network
->bridge
);
2145 log_link_error_errno(link
, r
, "Failed to add to bridge master's slave list: %m");
2148 if (link
->network
->bond
) {
2149 r
= link_set_bond(link
);
2151 log_link_error_errno(link
, r
, "Could not set bond message: %m");
2153 r
= link_append_to_master(link
, link
->network
->bond
);
2155 log_link_error_errno(link
, r
, "Failed to add to bond master's slave list: %m");
2158 if (link
->network
->use_br_vlan
&&
2159 (link
->network
->bridge
|| streq_ptr("bridge", link
->kind
))) {
2160 r
= link_set_bridge_vlan(link
);
2162 log_link_error_errno(link
, r
, "Could not set bridge vlan: %m");
2165 /* Skip setting up addresses until it gets carrier,
2166 or it would try to set addresses twice,
2167 which is bad for non-idempotent steps. */
2168 if (!link_has_carrier(link
) && !link
->network
->configure_without_carrier
)
2171 return link_request_set_addresses(link
);
2174 static int netdev_join_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
2178 assert(link
->network
);
2179 assert(link
->enslaving
> 0);
2183 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
2186 r
= sd_netlink_message_get_errno(m
);
2187 if (r
< 0 && r
!= -EEXIST
) {
2188 log_link_error_errno(link
, r
, "Could not join netdev: %m");
2189 link_enter_failed(link
);
2192 log_link_debug(link
, "Joined netdev");
2194 if (link
->enslaving
== 0) {
2201 static int link_enter_join_netdev(Link
*link
) {
2207 assert(link
->network
);
2208 assert(link
->state
== LINK_STATE_INITIALIZED
);
2210 link_set_state(link
, LINK_STATE_CONFIGURING
);
2213 link
->enslaving
= 0;
2215 if (link
->network
->bond
) {
2216 if (link
->network
->bond
->state
== NETDEV_STATE_READY
&&
2217 link
->network
->bond
->ifindex
== link
->master_ifindex
)
2218 return link_joined(link
);
2220 log_struct(LOG_DEBUG
,
2221 LOG_LINK_INTERFACE(link
),
2222 LOG_NETDEV_INTERFACE(link
->network
->bond
),
2223 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", link
->network
->bond
->ifname
));
2227 r
= netdev_join(link
->network
->bond
, link
, netdev_join_handler
);
2229 log_struct_errno(LOG_WARNING
, r
,
2230 LOG_LINK_INTERFACE(link
),
2231 LOG_NETDEV_INTERFACE(link
->network
->bond
),
2232 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", link
->network
->bond
->ifname
));
2233 link_enter_failed(link
);
2238 if (link
->network
->bridge
) {
2239 log_struct(LOG_DEBUG
,
2240 LOG_LINK_INTERFACE(link
),
2241 LOG_NETDEV_INTERFACE(link
->network
->bridge
),
2242 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", link
->network
->bridge
->ifname
));
2246 r
= netdev_join(link
->network
->bridge
, link
, netdev_join_handler
);
2248 log_struct_errno(LOG_WARNING
, r
,
2249 LOG_LINK_INTERFACE(link
),
2250 LOG_NETDEV_INTERFACE(link
->network
->bridge
),
2251 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", link
->network
->bridge
->ifname
));
2252 link_enter_failed(link
);
2257 if (link
->network
->vrf
) {
2258 log_struct(LOG_DEBUG
,
2259 LOG_LINK_INTERFACE(link
),
2260 LOG_NETDEV_INTERFACE(link
->network
->vrf
),
2261 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", link
->network
->vrf
->ifname
));
2265 r
= netdev_join(link
->network
->vrf
, link
, netdev_join_handler
);
2267 log_struct_errno(LOG_WARNING
, r
,
2268 LOG_LINK_INTERFACE(link
),
2269 LOG_NETDEV_INTERFACE(link
->network
->vrf
),
2270 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", link
->network
->vrf
->ifname
));
2271 link_enter_failed(link
);
2276 HASHMAP_FOREACH(netdev
, link
->network
->stacked_netdevs
, i
) {
2278 if (netdev
->ifindex
> 0)
2279 /* Assume already enslaved. */
2282 if (netdev_get_create_type(netdev
) != NETDEV_CREATE_STACKED
)
2285 log_struct(LOG_DEBUG
,
2286 LOG_LINK_INTERFACE(link
),
2287 LOG_NETDEV_INTERFACE(netdev
),
2288 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", netdev
->ifname
));
2292 r
= netdev_join(netdev
, link
, netdev_join_handler
);
2294 log_struct_errno(LOG_WARNING
, r
,
2295 LOG_LINK_INTERFACE(link
),
2296 LOG_NETDEV_INTERFACE(netdev
),
2297 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", netdev
->ifname
));
2298 link_enter_failed(link
);
2303 if (link
->enslaving
== 0)
2304 return link_joined(link
);
2309 static int link_set_ipv4_forward(Link
*link
) {
2312 if (!link_ipv4_forward_enabled(link
))
2315 /* We propagate the forwarding flag from one interface to the
2316 * global setting one way. This means: as long as at least one
2317 * interface was configured at any time that had IP forwarding
2318 * enabled the setting will stay on for good. We do this
2319 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2320 * somewhat in sync (see below). */
2322 r
= sysctl_write_ip_property(AF_INET
, NULL
, "ip_forward", "1");
2324 log_link_warning_errno(link
, r
, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
2329 static int link_set_ipv6_forward(Link
*link
) {
2332 if (!link_ipv6_forward_enabled(link
))
2335 /* On Linux, the IPv6 stack does not know a per-interface
2336 * packet forwarding setting: either packet forwarding is on
2337 * for all, or off for all. We hence don't bother with a
2338 * per-interface setting, but simply propagate the interface
2339 * flag, if it is set, to the global flag, one-way. Note that
2340 * while IPv4 would allow a per-interface flag, we expose the
2341 * same behaviour there and also propagate the setting from
2342 * one to all, to keep things simple (see above). */
2344 r
= sysctl_write_ip_property(AF_INET6
, "all", "forwarding", "1");
2346 log_link_warning_errno(link
, r
, "Cannot configure IPv6 packet forwarding, ignoring: %m");
2351 static int link_set_ipv6_privacy_extensions(Link
*link
) {
2352 IPv6PrivacyExtensions s
;
2355 s
= link_ipv6_privacy_extensions(link
);
2359 r
= sysctl_write_ip_property_int(AF_INET6
, link
->ifname
, "use_tempaddr", (int) link
->network
->ipv6_privacy_extensions
);
2361 log_link_warning_errno(link
, r
, "Cannot configure IPv6 privacy extension for interface: %m");
2366 static int link_set_ipv6_accept_ra(Link
*link
) {
2369 /* Make this a NOP if IPv6 is not available */
2370 if (!socket_ipv6_is_supported())
2373 if (link
->flags
& IFF_LOOPBACK
)
2379 r
= sysctl_write_ip_property(AF_INET6
, link
->ifname
, "accept_ra", "0");
2381 log_link_warning_errno(link
, r
, "Cannot disable kernel IPv6 accept_ra for interface: %m");
2386 static int link_set_ipv6_dad_transmits(Link
*link
) {
2389 /* Make this a NOP if IPv6 is not available */
2390 if (!socket_ipv6_is_supported())
2393 if (link
->flags
& IFF_LOOPBACK
)
2399 if (link
->network
->ipv6_dad_transmits
< 0)
2402 r
= sysctl_write_ip_property_int(AF_INET6
, link
->ifname
, "dad_transmits", link
->network
->ipv6_dad_transmits
);
2404 log_link_warning_errno(link
, r
, "Cannot set IPv6 dad transmits for interface: %m");
2409 static int link_set_ipv6_hop_limit(Link
*link
) {
2412 /* Make this a NOP if IPv6 is not available */
2413 if (!socket_ipv6_is_supported())
2416 if (link
->flags
& IFF_LOOPBACK
)
2422 if (link
->network
->ipv6_hop_limit
< 0)
2425 r
= sysctl_write_ip_property_int(AF_INET6
, link
->ifname
, "hop_limit", link
->network
->ipv6_hop_limit
);
2427 log_link_warning_errno(link
, r
, "Cannot set IPv6 hop limit for interface: %m");
2432 static int link_set_ipv6_mtu(Link
*link
) {
2435 /* Make this a NOP if IPv6 is not available */
2436 if (!socket_ipv6_is_supported())
2439 if (link
->flags
& IFF_LOOPBACK
)
2442 if (link
->network
->ipv6_mtu
== 0)
2445 r
= sysctl_write_ip_property_uint32(AF_INET6
, link
->ifname
, "mtu", link
->network
->ipv6_mtu
);
2447 log_link_warning_errno(link
, r
, "Cannot set IPv6 MTU for interface: %m");
2452 static bool link_is_static_address_configured(Link
*link
, Address
*address
) {
2453 Address
*net_address
;
2461 LIST_FOREACH(addresses
, net_address
, link
->network
->static_addresses
)
2462 if (address_equal(net_address
, address
))
2468 static bool link_is_static_route_configured(Link
*link
, Route
*route
) {
2477 LIST_FOREACH(routes
, net_route
, link
->network
->static_routes
)
2478 if (route_equal(net_route
, route
))
2484 static int link_drop_foreign_config(Link
*link
) {
2490 SET_FOREACH(address
, link
->addresses_foreign
, i
) {
2491 /* we consider IPv6LL addresses to be managed by the kernel */
2492 if (address
->family
== AF_INET6
&& in_addr_is_link_local(AF_INET6
, &address
->in_addr
) == 1)
2495 if (link_is_static_address_configured(link
, address
)) {
2496 r
= address_add(link
, address
->family
, &address
->in_addr
, address
->prefixlen
, NULL
);
2498 return log_link_error_errno(link
, r
, "Failed to add address: %m");
2500 r
= address_remove(address
, link
, NULL
);
2506 SET_FOREACH(route
, link
->routes_foreign
, i
) {
2507 /* do not touch routes managed by the kernel */
2508 if (route
->protocol
== RTPROT_KERNEL
)
2511 if (link_is_static_route_configured(link
, route
)) {
2512 r
= route_add(link
, route
->family
, &route
->dst
, route
->dst_prefixlen
, route
->tos
, route
->priority
, route
->table
, NULL
);
2516 r
= route_remove(route
, link
, NULL
);
2525 static int link_drop_config(Link
*link
) {
2526 Address
*address
, *pool_address
;
2531 SET_FOREACH(address
, link
->addresses
, i
) {
2532 /* we consider IPv6LL addresses to be managed by the kernel */
2533 if (address
->family
== AF_INET6
&& in_addr_is_link_local(AF_INET6
, &address
->in_addr
) == 1)
2536 r
= address_remove(address
, link
, NULL
);
2540 /* If this address came from an address pool, clean up the pool */
2541 LIST_FOREACH(addresses
, pool_address
, link
->pool_addresses
) {
2542 if (address_equal(address
, pool_address
)) {
2543 LIST_REMOVE(addresses
, link
->pool_addresses
, pool_address
);
2544 address_free(pool_address
);
2550 SET_FOREACH(route
, link
->routes
, i
) {
2551 /* do not touch routes managed by the kernel */
2552 if (route
->protocol
== RTPROT_KERNEL
)
2555 r
= route_remove(route
, link
, NULL
);
2565 static int link_configure(Link
*link
) {
2569 assert(link
->network
);
2570 assert(link
->state
== LINK_STATE_INITIALIZED
);
2572 if (STRPTR_IN_SET(link
->kind
, "can", "vcan"))
2573 return link_configure_can(link
);
2575 /* Drop foreign config, but ignore loopback or critical devices.
2576 * We do not want to remove loopback address or addresses used for root NFS. */
2577 if (!(link
->flags
& IFF_LOOPBACK
) && !(link
->network
->dhcp_critical
)) {
2578 r
= link_drop_foreign_config(link
);
2583 r
= link_set_proxy_arp(link
);
2587 r
= ipv6_proxy_ndp_addresses_configure(link
);
2591 r
= link_set_ipv4_forward(link
);
2595 r
= link_set_ipv6_forward(link
);
2599 r
= link_set_ipv6_privacy_extensions(link
);
2603 r
= link_set_ipv6_accept_ra(link
);
2607 r
= link_set_ipv6_dad_transmits(link
);
2611 r
= link_set_ipv6_hop_limit(link
);
2615 r
= link_set_flags(link
);
2619 r
= link_set_ipv6_mtu(link
);
2623 if (link_ipv4ll_enabled(link
, ADDRESS_FAMILY_IPV4
| ADDRESS_FAMILY_FALLBACK_IPV4
)) {
2624 r
= ipv4ll_configure(link
);
2629 if (link_dhcp4_enabled(link
)) {
2630 r
= dhcp4_set_promote_secondaries(link
);
2634 r
= dhcp4_configure(link
);
2639 if (link_dhcp4_server_enabled(link
)) {
2640 r
= sd_dhcp_server_new(&link
->dhcp_server
, link
->ifindex
);
2644 r
= sd_dhcp_server_attach_event(link
->dhcp_server
, NULL
, 0);
2649 if (link_dhcp6_enabled(link
) ||
2650 link_ipv6_accept_ra_enabled(link
)) {
2651 r
= dhcp6_configure(link
);
2656 if (link_ipv6_accept_ra_enabled(link
)) {
2657 r
= ndisc_configure(link
);
2662 if (link_radv_enabled(link
)) {
2663 r
= radv_configure(link
);
2668 if (link_lldp_rx_enabled(link
)) {
2669 r
= link_lldp_rx_configure(link
);
2674 r
= link_configure_mtu(link
);
2678 r
= link_configure_addrgen_mode(link
);
2682 return link_configure_after_setting_mtu(link
);
2685 static int link_configure_after_setting_mtu(Link
*link
) {
2689 assert(link
->network
);
2690 assert(link
->state
== LINK_STATE_INITIALIZED
);
2692 if (link
->setting_mtu
)
2695 if (link_has_carrier(link
) || link
->network
->configure_without_carrier
) {
2696 r
= link_acquire_conf(link
);
2701 return link_enter_join_netdev(link
);
2704 static int duid_set_uuid(DUID
*duid
, sd_id128_t uuid
) {
2707 if (duid
->raw_data_len
> 0)
2710 if (duid
->type
!= DUID_TYPE_UUID
)
2713 memcpy(&duid
->raw_data
, &uuid
, sizeof(sd_id128_t
));
2714 duid
->raw_data_len
= sizeof(sd_id128_t
);
2719 int get_product_uuid_handler(sd_bus_message
*m
, void *userdata
, sd_bus_error
*ret_error
) {
2720 Manager
*manager
= userdata
;
2721 const sd_bus_error
*e
;
2731 e
= sd_bus_message_get_error(m
);
2733 log_error_errno(sd_bus_error_get_errno(e
),
2734 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
2739 r
= sd_bus_message_read_array(m
, 'y', &a
, &sz
);
2743 if (sz
!= sizeof(sd_id128_t
)) {
2744 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
2748 memcpy(&manager
->product_uuid
, a
, sz
);
2749 while ((duid
= set_steal_first(manager
->duids_requesting_uuid
)))
2750 (void) duid_set_uuid(duid
, manager
->product_uuid
);
2752 manager
->duids_requesting_uuid
= set_free(manager
->duids_requesting_uuid
);
2755 while ((link
= set_steal_first(manager
->links_requesting_uuid
))) {
2756 r
= link_configure(link
);
2758 log_link_error_errno(link
, r
, "Failed to configure link: %m");
2761 manager
->links_requesting_uuid
= set_free(manager
->links_requesting_uuid
);
2763 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2764 * even if the method fails. */
2765 manager
->has_product_uuid
= true;
2770 static bool link_requires_uuid(Link
*link
) {
2774 assert(link
->manager
);
2775 assert(link
->network
);
2777 duid
= link_get_duid(link
);
2778 if (duid
->type
!= DUID_TYPE_UUID
|| duid
->raw_data_len
!= 0)
2781 if (link_dhcp4_enabled(link
) && IN_SET(link
->network
->dhcp_client_identifier
, DHCP_CLIENT_ID_DUID
, DHCP_CLIENT_ID_DUID_ONLY
))
2784 if (link_dhcp6_enabled(link
) || link_ipv6_accept_ra_enabled(link
))
2790 static int link_configure_duid(Link
*link
) {
2796 assert(link
->manager
);
2797 assert(link
->network
);
2800 duid
= link_get_duid(link
);
2802 if (!link_requires_uuid(link
))
2805 if (m
->has_product_uuid
) {
2806 (void) duid_set_uuid(duid
, m
->product_uuid
);
2810 if (!m
->links_requesting_uuid
) {
2811 r
= manager_request_product_uuid(m
, link
);
2816 log_link_warning_errno(link
, r
,
2817 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
2821 r
= set_put(m
->links_requesting_uuid
, link
);
2825 r
= set_put(m
->duids_requesting_uuid
, duid
);
2833 static int link_initialized_and_synced(Link
*link
) {
2838 assert(link
->ifname
);
2839 assert(link
->manager
);
2841 /* We may get called either from the asynchronous netlink callback,
2842 * or directly for link_add() if running in a container. See link_add(). */
2843 if (!IN_SET(link
->state
, LINK_STATE_PENDING
, LINK_STATE_INITIALIZED
))
2846 log_link_debug(link
, "Link state is up-to-date");
2847 link_set_state(link
, LINK_STATE_INITIALIZED
);
2849 r
= link_new_bound_by_list(link
);
2853 r
= link_handle_bound_by_list(link
);
2857 if (!link
->network
) {
2858 r
= network_get(link
->manager
, link
->sd_device
, link
->ifname
,
2859 &link
->mac
, &network
);
2861 link_enter_unmanaged(link
);
2863 } else if (r
== 0 && network
->unmanaged
) {
2864 link_enter_unmanaged(link
);
2869 if (link
->flags
& IFF_LOOPBACK
) {
2870 if (network
->link_local
!= ADDRESS_FAMILY_NO
)
2871 log_link_debug(link
, "Ignoring link-local autoconfiguration for loopback link");
2873 if (network
->dhcp
!= ADDRESS_FAMILY_NO
)
2874 log_link_debug(link
, "Ignoring DHCP clients for loopback link");
2876 if (network
->dhcp_server
)
2877 log_link_debug(link
, "Ignoring DHCP server for loopback link");
2880 r
= network_apply(network
, link
);
2885 r
= link_new_bound_to_list(link
);
2889 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2890 * link_configure() is called later asynchronously. */
2891 r
= link_configure_duid(link
);
2895 r
= link_configure(link
);
2902 static int link_initialized_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
2903 (void) link_initialized_and_synced(link
);
2907 int link_initialized(Link
*link
, sd_device
*device
) {
2908 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
2912 assert(link
->manager
);
2913 assert(link
->manager
->rtnl
);
2916 if (link
->state
!= LINK_STATE_PENDING
)
2919 if (link
->sd_device
)
2922 log_link_debug(link
, "udev initialized link");
2923 link_set_state(link
, LINK_STATE_INITIALIZED
);
2925 link
->sd_device
= sd_device_ref(device
);
2927 /* udev has initialized the link, but we don't know if we have yet
2928 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2929 * when it returns we know that the pending NEWLINKs have already been
2930 * processed and that we are up-to-date */
2932 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_GETLINK
,
2937 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, link_initialized_handler
,
2938 link_netlink_destroy_callback
, link
);
2947 static int link_load(Link
*link
) {
2948 _cleanup_free_
char *network_file
= NULL
,
2951 *dhcp4_address
= NULL
,
2952 *ipv4ll_address
= NULL
;
2953 union in_addr_union address
;
2954 union in_addr_union route_dst
;
2960 r
= parse_env_file(NULL
, link
->state_file
,
2961 "NETWORK_FILE", &network_file
,
2962 "ADDRESSES", &addresses
,
2964 "DHCP4_ADDRESS", &dhcp4_address
,
2965 "IPV4LL_ADDRESS", &ipv4ll_address
);
2966 if (r
< 0 && r
!= -ENOENT
)
2967 return log_link_error_errno(link
, r
, "Failed to read %s: %m", link
->state_file
);
2974 suffix
= strrchr(network_file
, '.');
2976 log_link_debug(link
, "Failed to get network name from %s", network_file
);
2977 goto network_file_fail
;
2981 r
= network_get_by_name(link
->manager
, basename(network_file
), &network
);
2983 log_link_debug_errno(link
, r
, "Failed to get network %s: %m", basename(network_file
));
2984 goto network_file_fail
;
2987 r
= network_apply(network
, link
);
2989 return log_link_error_errno(link
, r
, "Failed to apply network %s: %m", basename(network_file
));
2998 _cleanup_free_
char *address_str
= NULL
;
2999 char *prefixlen_str
;
3001 unsigned char prefixlen
;
3003 r
= extract_first_word(&p
, &address_str
, NULL
, 0);
3005 log_link_debug_errno(link
, r
, "Failed to extract next address string: %m");
3011 prefixlen_str
= strchr(address_str
, '/');
3012 if (!prefixlen_str
) {
3013 log_link_debug(link
, "Failed to parse address and prefix length %s", address_str
);
3017 *prefixlen_str
++ = '\0';
3019 r
= sscanf(prefixlen_str
, "%hhu", &prefixlen
);
3021 log_link_error(link
, "Failed to parse prefixlen %s", prefixlen_str
);
3025 r
= in_addr_from_string_auto(address_str
, &family
, &address
);
3027 log_link_debug_errno(link
, r
, "Failed to parse address %s: %m", address_str
);
3031 r
= address_add(link
, family
, &address
, prefixlen
, NULL
);
3033 return log_link_error_errno(link
, r
, "Failed to add address: %m");
3042 _cleanup_free_
char *route_str
= NULL
;
3043 _cleanup_(sd_event_source_unrefp
) sd_event_source
*expire
= NULL
;
3045 char *prefixlen_str
;
3047 unsigned char prefixlen
, tos
, table
;
3050 r
= extract_first_word(&p
, &route_str
, NULL
, 0);
3052 log_link_debug_errno(link
, r
, "Failed to extract next route string: %m");
3058 prefixlen_str
= strchr(route_str
, '/');
3059 if (!prefixlen_str
) {
3060 log_link_debug(link
, "Failed to parse route %s", route_str
);
3064 *prefixlen_str
++ = '\0';
3066 r
= sscanf(prefixlen_str
, "%hhu/%hhu/%"SCNu32
"/%hhu/"USEC_FMT
, &prefixlen
, &tos
, &priority
, &table
, &lifetime
);
3068 log_link_debug(link
,
3069 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3074 r
= in_addr_from_string_auto(route_str
, &family
, &route_dst
);
3076 log_link_debug_errno(link
, r
, "Failed to parse route destination %s: %m", route_str
);
3080 r
= route_add(link
, family
, &route_dst
, prefixlen
, tos
, priority
, table
, &route
);
3082 return log_link_error_errno(link
, r
, "Failed to add route: %m");
3084 if (lifetime
!= USEC_INFINITY
&& !kernel_route_expiration_supported()) {
3085 r
= sd_event_add_time(link
->manager
->event
, &expire
, clock_boottime_or_monotonic(), lifetime
,
3086 0, route_expire_handler
, route
);
3088 log_link_warning_errno(link
, r
, "Could not arm route expiration handler: %m");
3091 route
->lifetime
= lifetime
;
3092 sd_event_source_unref(route
->expire
);
3093 route
->expire
= TAKE_PTR(expire
);
3097 if (dhcp4_address
) {
3098 r
= in_addr_from_string(AF_INET
, dhcp4_address
, &address
);
3100 log_link_debug_errno(link
, r
, "Failed to parse DHCPv4 address %s: %m", dhcp4_address
);
3101 goto dhcp4_address_fail
;
3104 r
= sd_dhcp_client_new(&link
->dhcp_client
, link
->network
? link
->network
->dhcp_anonymize
: 0);
3106 return log_link_error_errno(link
, r
, "Failed to create DHCPv4 client: %m");
3108 r
= sd_dhcp_client_set_request_address(link
->dhcp_client
, &address
.in
);
3110 return log_link_error_errno(link
, r
, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address
);
3115 if (ipv4ll_address
) {
3116 r
= in_addr_from_string(AF_INET
, ipv4ll_address
, &address
);
3118 log_link_debug_errno(link
, r
, "Failed to parse IPv4LL address %s: %m", ipv4ll_address
);
3119 goto ipv4ll_address_fail
;
3122 r
= sd_ipv4ll_new(&link
->ipv4ll
);
3124 return log_link_error_errno(link
, r
, "Failed to create IPv4LL client: %m");
3126 r
= sd_ipv4ll_set_address(link
->ipv4ll
, &address
.in
);
3128 return log_link_error_errno(link
, r
, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address
);
3131 ipv4ll_address_fail
:
3136 int link_add(Manager
*m
, sd_netlink_message
*message
, Link
**ret
) {
3137 _cleanup_(sd_device_unrefp
) sd_device
*device
= NULL
;
3138 char ifindex_str
[2 + DECIMAL_STR_MAX(int)];
3147 r
= link_new(m
, message
, ret
);
3153 log_link_debug(link
, "Link %d added", link
->ifindex
);
3155 r
= link_load(link
);
3159 if (detect_container() <= 0) {
3160 /* not in a container, udev will be around */
3161 sprintf(ifindex_str
, "n%d", link
->ifindex
);
3162 r
= sd_device_new_from_device_id(&device
, ifindex_str
);
3164 log_link_warning_errno(link
, r
, "Could not find device: %m");
3168 r
= sd_device_get_is_initialized(device
);
3170 log_link_warning_errno(link
, r
, "Could not determine whether the device is initialized or not: %m");
3175 log_link_debug(link
, "link pending udev initialization...");
3179 r
= device_is_renaming(device
);
3181 log_link_warning_errno(link
, r
, "Failed to determine the device is renamed or not: %m");
3185 log_link_debug(link
, "Interface is under renaming, pending initialization.");
3189 r
= link_initialized(link
, device
);
3193 r
= link_initialized_and_synced(link
);
3200 link_enter_failed(link
);
3204 int link_ipv6ll_gained(Link
*link
, const struct in6_addr
*address
) {
3209 log_link_info(link
, "Gained IPv6LL");
3211 link
->ipv6ll_address
= *address
;
3212 link_check_ready(link
);
3214 if (IN_SET(link
->state
, LINK_STATE_CONFIGURING
, LINK_STATE_CONFIGURED
)) {
3215 r
= link_acquire_ipv6_conf(link
);
3217 link_enter_failed(link
);
3225 static int link_carrier_gained(Link
*link
) {
3230 if (IN_SET(link
->state
, LINK_STATE_CONFIGURING
, LINK_STATE_CONFIGURED
)) {
3231 r
= link_acquire_conf(link
);
3233 link_enter_failed(link
);
3237 r
= link_request_set_addresses(link
);
3242 r
= link_handle_bound_by_list(link
);
3249 static int link_carrier_lost(Link
*link
) {
3254 if (link
->network
&& link
->network
->ignore_carrier_loss
)
3257 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
3258 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3259 * configuration and stop the clients as well. */
3260 if (link
->setting_mtu
)
3263 r
= link_stop_clients(link
);
3265 link_enter_failed(link
);
3269 if (link_dhcp4_server_enabled(link
))
3270 (void) sd_dhcp_server_stop(link
->dhcp_server
);
3272 r
= link_drop_config(link
);
3276 if (!IN_SET(link
->state
, LINK_STATE_UNMANAGED
, LINK_STATE_PENDING
)) {
3277 log_link_debug(link
, "State is %s, dropping config", link_state_to_string(link
->state
));
3278 r
= link_drop_foreign_config(link
);
3283 r
= link_handle_bound_by_list(link
);
3290 int link_carrier_reset(Link
*link
) {
3295 if (link_has_carrier(link
)) {
3296 r
= link_carrier_lost(link
);
3300 r
= link_carrier_gained(link
);
3304 log_link_info(link
, "Reset carrier");
3310 int link_update(Link
*link
, sd_netlink_message
*m
) {
3311 struct ether_addr mac
;
3314 bool had_carrier
, carrier_gained
, carrier_lost
;
3318 assert(link
->ifname
);
3321 if (link
->state
== LINK_STATE_LINGER
) {
3322 log_link_info(link
, "Link re-added");
3323 link_set_state(link
, LINK_STATE_CONFIGURING
);
3325 r
= link_new_carrier_maps(link
);
3330 r
= sd_netlink_message_read_string(m
, IFLA_IFNAME
, &ifname
);
3331 if (r
>= 0 && !streq(ifname
, link
->ifname
)) {
3332 Manager
*manager
= link
->manager
;
3334 log_link_info(link
, "Interface name change detected, %s has been renamed to %s.", link
->ifname
, ifname
);
3337 r
= link_add(manager
, m
, &link
);
3342 r
= sd_netlink_message_read_u32(m
, IFLA_MTU
, &mtu
);
3343 if (r
>= 0 && mtu
> 0) {
3345 if (link
->original_mtu
== 0) {
3346 link
->original_mtu
= mtu
;
3347 log_link_debug(link
, "Saved original MTU: %" PRIu32
, link
->original_mtu
);
3350 if (link
->dhcp_client
) {
3351 r
= sd_dhcp_client_set_mtu(link
->dhcp_client
,
3354 return log_link_warning_errno(link
, r
, "Could not update MTU in DHCP client: %m");
3358 r
= sd_radv_set_mtu(link
->radv
, link
->mtu
);
3360 return log_link_warning_errno(link
, r
, "Could not set MTU for Router Advertisement: %m");
3364 /* The kernel may broadcast NEWLINK messages without the MAC address
3365 set, simply ignore them. */
3366 r
= sd_netlink_message_read_ether_addr(m
, IFLA_ADDRESS
, &mac
);
3368 if (memcmp(link
->mac
.ether_addr_octet
, mac
.ether_addr_octet
,
3371 memcpy(link
->mac
.ether_addr_octet
, mac
.ether_addr_octet
,
3374 log_link_debug(link
, "MAC address: "
3375 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3376 mac
.ether_addr_octet
[0],
3377 mac
.ether_addr_octet
[1],
3378 mac
.ether_addr_octet
[2],
3379 mac
.ether_addr_octet
[3],
3380 mac
.ether_addr_octet
[4],
3381 mac
.ether_addr_octet
[5]);
3384 r
= sd_ipv4ll_set_mac(link
->ipv4ll
, &link
->mac
);
3386 return log_link_warning_errno(link
, r
, "Could not update MAC address in IPv4LL client: %m");
3389 if (link
->dhcp_client
) {
3390 r
= sd_dhcp_client_set_mac(link
->dhcp_client
,
3391 (const uint8_t *) &link
->mac
,
3395 return log_link_warning_errno(link
, r
, "Could not update MAC address in DHCP client: %m");
3397 r
= dhcp4_set_client_identifier(link
);
3402 if (link
->dhcp6_client
) {
3403 const DUID
* duid
= link_get_duid(link
);
3405 r
= sd_dhcp6_client_set_mac(link
->dhcp6_client
,
3406 (const uint8_t *) &link
->mac
,
3410 return log_link_warning_errno(link
, r
, "Could not update MAC address in DHCPv6 client: %m");
3412 if (link
->network
->iaid_set
) {
3413 r
= sd_dhcp6_client_set_iaid(link
->dhcp6_client
,
3414 link
->network
->iaid
);
3416 return log_link_warning_errno(link
, r
, "Could not update DHCPv6 IAID: %m");
3419 r
= sd_dhcp6_client_set_duid(link
->dhcp6_client
,
3421 duid
->raw_data_len
> 0 ? duid
->raw_data
: NULL
,
3422 duid
->raw_data_len
);
3424 return log_link_warning_errno(link
, r
, "Could not update DHCPv6 DUID: %m");
3428 r
= sd_radv_set_mac(link
->radv
, &link
->mac
);
3430 return log_link_warning_errno(link
, r
, "Could not update MAC for Router Advertisement: %m");
3434 r
= sd_ndisc_set_mac(link
->ndisc
, &link
->mac
);
3436 return log_link_warning_errno(link
, r
, "Could not update MAC for ndisc: %m");
3441 old_master
= link
->master_ifindex
;
3442 (void) sd_netlink_message_read_u32(m
, IFLA_MASTER
, (uint32_t *) &link
->master_ifindex
);
3444 had_carrier
= link_has_carrier(link
);
3446 r
= link_update_flags(link
, m
, old_master
!= link
->master_ifindex
);
3450 r
= link_update_lldp(link
);
3454 carrier_gained
= !had_carrier
&& link_has_carrier(link
);
3455 carrier_lost
= had_carrier
&& !link_has_carrier(link
);
3457 if (carrier_gained
) {
3458 log_link_info(link
, "Gained carrier");
3460 r
= link_carrier_gained(link
);
3463 } else if (carrier_lost
) {
3464 log_link_info(link
, "Lost carrier");
3466 r
= link_carrier_lost(link
);
3474 static void print_link_hashmap(FILE *f
, const char *prefix
, Hashmap
* h
) {
3482 if (hashmap_isempty(h
))
3486 HASHMAP_FOREACH(link
, h
, i
) {
3490 fprintf(f
, "%i", link
->ifindex
);
3497 int link_save(Link
*link
) {
3498 _cleanup_free_
char *temp_path
= NULL
;
3499 _cleanup_fclose_
FILE *f
= NULL
;
3500 const char *admin_state
, *oper_state
;
3507 assert(link
->state_file
);
3508 assert(link
->lease_file
);
3509 assert(link
->manager
);
3511 if (link
->state
== LINK_STATE_LINGER
) {
3512 (void) unlink(link
->state_file
);
3516 link_lldp_save(link
);
3518 admin_state
= link_state_to_string(link
->state
);
3519 assert(admin_state
);
3521 oper_state
= link_operstate_to_string(link
->operstate
);
3524 r
= fopen_temporary(link
->state_file
, &f
, &temp_path
);
3528 (void) fchmod(fileno(f
), 0644);
3531 "# This is private data. Do not parse.\n"
3534 admin_state
, oper_state
);
3536 if (link
->network
) {
3537 char **dhcp6_domains
= NULL
, **dhcp_domains
= NULL
;
3538 const char *dhcp_domainname
= NULL
, *p
;
3539 sd_dhcp6_lease
*dhcp6_lease
= NULL
;
3543 fprintf(f
, "REQUIRED_FOR_ONLINE=%s\n",
3544 yes_no(link
->network
->required_for_online
));
3546 fprintf(f
, "REQUIRED_OPER_STATE_FOR_ONLINE=%s\n",
3547 strempty(link_operstate_to_string(link
->network
->required_operstate_for_online
)));
3549 if (link
->dhcp6_client
) {
3550 r
= sd_dhcp6_client_get_lease(link
->dhcp6_client
, &dhcp6_lease
);
3551 if (r
< 0 && r
!= -ENOMSG
)
3552 log_link_debug(link
, "No DHCPv6 lease");
3555 fprintf(f
, "NETWORK_FILE=%s\n", link
->network
->filename
);
3560 for (j
= 0; j
< link
->network
->n_dns
; j
++) {
3561 _cleanup_free_
char *b
= NULL
;
3563 r
= in_addr_to_string(link
->network
->dns
[j
].family
,
3564 &link
->network
->dns
[j
].address
, &b
);
3566 log_debug_errno(r
, "Failed to format address, ignoring: %m");
3576 if (link
->network
->dhcp_use_dns
&&
3578 const struct in_addr
*addresses
;
3580 r
= sd_dhcp_lease_get_dns(link
->dhcp_lease
, &addresses
);
3582 if (serialize_in_addrs(f
, addresses
, r
, space
, in4_addr_is_non_local
) > 0)
3586 if (link
->network
->dhcp_use_dns
&& dhcp6_lease
) {
3587 struct in6_addr
*in6_addrs
;
3589 r
= sd_dhcp6_lease_get_dns(dhcp6_lease
, &in6_addrs
);
3593 serialize_in6_addrs(f
, in6_addrs
, r
);
3598 /* Make sure to flush out old entries before we use the NDISC data */
3601 if (link
->network
->ipv6_accept_ra_use_dns
&& link
->ndisc_rdnss
) {
3604 SET_FOREACH(dd
, link
->ndisc_rdnss
, i
) {
3608 serialize_in6_addrs(f
, &dd
->address
, 1);
3617 fputstrv(f
, link
->network
->ntp
, NULL
, &space
);
3619 if (link
->network
->dhcp_use_ntp
&&
3621 const struct in_addr
*addresses
;
3623 r
= sd_dhcp_lease_get_ntp(link
->dhcp_lease
, &addresses
);
3625 if (serialize_in_addrs(f
, addresses
, r
, space
, in4_addr_is_non_local
) > 0)
3629 if (link
->network
->dhcp_use_ntp
&& dhcp6_lease
) {
3630 struct in6_addr
*in6_addrs
;
3633 r
= sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease
,
3638 serialize_in6_addrs(f
, in6_addrs
, r
);
3642 r
= sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease
, &hosts
);
3644 fputstrv(f
, hosts
, NULL
, &space
);
3649 if (link
->network
->dhcp_use_domains
!= DHCP_USE_DOMAINS_NO
) {
3650 if (link
->dhcp_lease
) {
3651 (void) sd_dhcp_lease_get_domainname(link
->dhcp_lease
, &dhcp_domainname
);
3652 (void) sd_dhcp_lease_get_search_domains(link
->dhcp_lease
, &dhcp_domains
);
3655 (void) sd_dhcp6_lease_get_domains(dhcp6_lease
, &dhcp6_domains
);
3658 fputs("DOMAINS=", f
);
3660 ORDERED_SET_FOREACH(p
, link
->network
->search_domains
, i
)
3661 fputs_with_space(f
, p
, NULL
, &space
);
3663 if (link
->network
->dhcp_use_domains
== DHCP_USE_DOMAINS_YES
) {
3666 if (dhcp_domainname
)
3667 fputs_with_space(f
, dhcp_domainname
, NULL
, &space
);
3669 fputstrv(f
, dhcp_domains
, NULL
, &space
);
3671 fputstrv(f
, dhcp6_domains
, NULL
, &space
);
3673 SET_FOREACH(dd
, link
->ndisc_dnssl
, i
)
3674 fputs_with_space(f
, NDISC_DNSSL_DOMAIN(dd
), NULL
, &space
);
3679 fputs("ROUTE_DOMAINS=", f
);
3681 ORDERED_SET_FOREACH(p
, link
->network
->route_domains
, i
)
3682 fputs_with_space(f
, p
, NULL
, &space
);
3684 if (link
->network
->dhcp_use_domains
== DHCP_USE_DOMAINS_ROUTE
) {
3687 if (dhcp_domainname
)
3688 fputs_with_space(f
, dhcp_domainname
, NULL
, &space
);
3690 fputstrv(f
, dhcp_domains
, NULL
, &space
);
3692 fputstrv(f
, dhcp6_domains
, NULL
, &space
);
3694 SET_FOREACH(dd
, link
->ndisc_dnssl
, i
)
3695 fputs_with_space(f
, NDISC_DNSSL_DOMAIN(dd
), NULL
, &space
);
3700 fprintf(f
, "LLMNR=%s\n",
3701 resolve_support_to_string(link
->network
->llmnr
));
3702 fprintf(f
, "MDNS=%s\n",
3703 resolve_support_to_string(link
->network
->mdns
));
3704 if (link
->network
->dns_default_route
>= 0)
3705 fprintf(f
, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link
->network
->dns_default_route
));
3707 if (link
->network
->dns_over_tls_mode
!= _DNS_OVER_TLS_MODE_INVALID
)
3708 fprintf(f
, "DNS_OVER_TLS=%s\n",
3709 dns_over_tls_mode_to_string(link
->network
->dns_over_tls_mode
));
3711 if (link
->network
->dnssec_mode
!= _DNSSEC_MODE_INVALID
)
3712 fprintf(f
, "DNSSEC=%s\n",
3713 dnssec_mode_to_string(link
->network
->dnssec_mode
));
3715 if (!set_isempty(link
->network
->dnssec_negative_trust_anchors
)) {
3718 fputs("DNSSEC_NTA=", f
);
3720 SET_FOREACH(n
, link
->network
->dnssec_negative_trust_anchors
, i
)
3721 fputs_with_space(f
, n
, NULL
, &space
);
3725 fputs("ADDRESSES=", f
);
3727 SET_FOREACH(a
, link
->addresses
, i
) {
3728 _cleanup_free_
char *address_str
= NULL
;
3730 r
= in_addr_to_string(a
->family
, &a
->in_addr
, &address_str
);
3734 fprintf(f
, "%s%s/%u", space
? " " : "", address_str
, a
->prefixlen
);
3739 fputs("ROUTES=", f
);
3741 SET_FOREACH(route
, link
->routes
, i
) {
3742 _cleanup_free_
char *route_str
= NULL
;
3744 r
= in_addr_to_string(route
->family
, &route
->dst
, &route_str
);
3748 fprintf(f
, "%s%s/%hhu/%hhu/%"PRIu32
"/%"PRIu32
"/"USEC_FMT
,
3749 space
? " " : "", route_str
,
3750 route
->dst_prefixlen
, route
->tos
, route
->priority
, route
->table
, route
->lifetime
);
3757 print_link_hashmap(f
, "CARRIER_BOUND_TO=", link
->bound_to_links
);
3758 print_link_hashmap(f
, "CARRIER_BOUND_BY=", link
->bound_by_links
);
3760 if (link
->dhcp_lease
) {
3761 struct in_addr address
;
3762 const char *tz
= NULL
;
3764 assert(link
->network
);
3766 r
= sd_dhcp_lease_get_timezone(link
->dhcp_lease
, &tz
);
3768 fprintf(f
, "TIMEZONE=%s\n", tz
);
3770 r
= sd_dhcp_lease_get_address(link
->dhcp_lease
, &address
);
3772 fputs("DHCP4_ADDRESS=", f
);
3773 serialize_in_addrs(f
, &address
, 1, false, NULL
);
3777 r
= dhcp_lease_save(link
->dhcp_lease
, link
->lease_file
);
3785 (void) unlink(link
->lease_file
);
3788 struct in_addr address
;
3790 r
= sd_ipv4ll_get_address(link
->ipv4ll
, &address
);
3792 fputs("IPV4LL_ADDRESS=", f
);
3793 serialize_in_addrs(f
, &address
, 1, false, NULL
);
3798 r
= fflush_and_check(f
);
3802 if (rename(temp_path
, link
->state_file
) < 0) {
3810 (void) unlink(link
->state_file
);
3812 (void) unlink(temp_path
);
3814 return log_link_error_errno(link
, r
, "Failed to save link data to %s: %m", link
->state_file
);
3817 /* The serialized state in /run is no longer up-to-date. */
3818 void link_dirty(Link
*link
) {
3823 /* mark manager dirty as link is dirty */
3824 manager_dirty(link
->manager
);
3826 r
= set_ensure_allocated(&link
->manager
->dirty_links
, NULL
);
3828 /* allocation errors are ignored */
3831 r
= set_put(link
->manager
->dirty_links
, link
);
3833 /* don't take another ref if the link was already dirty */
3839 /* The serialized state in /run is up-to-date */
3840 void link_clean(Link
*link
) {
3842 assert(link
->manager
);
3844 link_unref(set_remove(link
->manager
->dirty_links
, link
));
3847 static const char* const link_state_table
[_LINK_STATE_MAX
] = {
3848 [LINK_STATE_PENDING
] = "pending",
3849 [LINK_STATE_INITIALIZED
] = "initialized",
3850 [LINK_STATE_CONFIGURING
] = "configuring",
3851 [LINK_STATE_CONFIGURED
] = "configured",
3852 [LINK_STATE_UNMANAGED
] = "unmanaged",
3853 [LINK_STATE_FAILED
] = "failed",
3854 [LINK_STATE_LINGER
] = "linger",
3857 DEFINE_STRING_TABLE_LOOKUP(link_state
, LinkState
);