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"
16 #include "missing_network.h"
17 #include "netlink-util.h"
18 #include "network-internal.h"
19 #include "networkd-ipv6-proxy-ndp.h"
20 #include "networkd-lldp-tx.h"
21 #include "networkd-manager.h"
22 #include "networkd-ndisc.h"
23 #include "networkd-radv.h"
24 #include "networkd-routing-policy-rule.h"
26 #include "socket-util.h"
27 #include "stdio-util.h"
28 #include "string-table.h"
30 #include "tmpfile-util.h"
34 DUID
* link_get_duid(Link
*link
) {
35 if (link
->network
->duid
.type
!= _DUID_TYPE_INVALID
)
36 return &link
->network
->duid
;
38 return &link
->manager
->duid
;
41 static bool link_dhcp6_enabled(Link
*link
) {
44 if (!socket_ipv6_is_supported())
47 if (link
->flags
& IFF_LOOPBACK
)
53 return link
->network
->dhcp
& ADDRESS_FAMILY_IPV6
;
56 static bool link_dhcp4_enabled(Link
*link
) {
59 if (link
->flags
& IFF_LOOPBACK
)
65 return link
->network
->dhcp
& ADDRESS_FAMILY_IPV4
;
68 static bool link_dhcp4_server_enabled(Link
*link
) {
71 if (link
->flags
& IFF_LOOPBACK
)
77 return link
->network
->dhcp_server
;
80 static bool link_ipv4ll_enabled(Link
*link
) {
83 if (link
->flags
& IFF_LOOPBACK
)
89 if (streq_ptr(link
->kind
, "wireguard"))
92 return link
->network
->link_local
& ADDRESS_FAMILY_IPV4
;
95 static bool link_ipv6ll_enabled(Link
*link
) {
98 if (!socket_ipv6_is_supported())
101 if (link
->flags
& IFF_LOOPBACK
)
107 if (streq_ptr(link
->kind
, "wireguard"))
110 return link
->network
->link_local
& ADDRESS_FAMILY_IPV6
;
113 static bool link_ipv6_enabled(Link
*link
) {
116 if (!socket_ipv6_is_supported())
119 if (link
->network
->bridge
)
122 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
123 return link_ipv6ll_enabled(link
) || network_has_static_ipv6_addresses(link
->network
);
126 static bool link_radv_enabled(Link
*link
) {
129 if (!link_ipv6ll_enabled(link
))
132 return link
->network
->router_prefix_delegation
!= RADV_PREFIX_DELEGATION_NONE
;
135 static bool link_lldp_rx_enabled(Link
*link
) {
138 if (link
->flags
& IFF_LOOPBACK
)
141 if (link
->iftype
!= ARPHRD_ETHER
)
147 /* LLDP should be handled on bridge slaves as those have a direct
148 * connection to their peers not on the bridge master. Linux doesn't
149 * even (by default) forward lldp packets to the bridge master.*/
150 if (streq_ptr("bridge", link
->kind
))
153 return link
->network
->lldp_mode
!= LLDP_MODE_NO
;
156 static bool link_lldp_emit_enabled(Link
*link
) {
159 if (link
->flags
& IFF_LOOPBACK
)
162 if (link
->iftype
!= ARPHRD_ETHER
)
168 return link
->network
->lldp_emit
!= LLDP_EMIT_NO
;
171 static bool link_ipv4_forward_enabled(Link
*link
) {
174 if (link
->flags
& IFF_LOOPBACK
)
180 if (link
->network
->ip_forward
== _ADDRESS_FAMILY_BOOLEAN_INVALID
)
183 return link
->network
->ip_forward
& ADDRESS_FAMILY_IPV4
;
186 static bool link_ipv6_forward_enabled(Link
*link
) {
189 if (!socket_ipv6_is_supported())
192 if (link
->flags
& IFF_LOOPBACK
)
198 if (link
->network
->ip_forward
== _ADDRESS_FAMILY_BOOLEAN_INVALID
)
201 return link
->network
->ip_forward
& ADDRESS_FAMILY_IPV6
;
204 static bool link_proxy_arp_enabled(Link
*link
) {
207 if (link
->flags
& IFF_LOOPBACK
)
213 if (link
->network
->proxy_arp
< 0)
219 static bool link_ipv6_accept_ra_enabled(Link
*link
) {
222 if (!socket_ipv6_is_supported())
225 if (link
->flags
& IFF_LOOPBACK
)
231 if (!link_ipv6ll_enabled(link
))
234 /* If unset use system default (enabled if local forwarding is disabled.
235 * disabled if local forwarding is enabled).
236 * If set, ignore or enforce RA independent of local forwarding state.
238 if (link
->network
->ipv6_accept_ra
< 0)
239 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
240 return !link_ipv6_forward_enabled(link
);
241 else if (link
->network
->ipv6_accept_ra
> 0)
242 /* accept RA even if ip_forward is enabled */
249 static IPv6PrivacyExtensions
link_ipv6_privacy_extensions(Link
*link
) {
252 if (!socket_ipv6_is_supported())
253 return _IPV6_PRIVACY_EXTENSIONS_INVALID
;
255 if (link
->flags
& IFF_LOOPBACK
)
256 return _IPV6_PRIVACY_EXTENSIONS_INVALID
;
259 return _IPV6_PRIVACY_EXTENSIONS_INVALID
;
261 return link
->network
->ipv6_privacy_extensions
;
264 static int link_enable_ipv6(Link
*link
) {
265 const char *p
= NULL
;
269 if (link
->flags
& IFF_LOOPBACK
)
272 disabled
= !link_ipv6_enabled(link
);
274 p
= strjoina("/proc/sys/net/ipv6/conf/", link
->ifname
, "/disable_ipv6");
276 r
= write_string_file(p
, one_zero(disabled
), WRITE_STRING_FILE_VERIFY_ON_FAILURE
| WRITE_STRING_FILE_DISABLE_BUFFER
);
278 log_link_warning_errno(link
, r
, "Cannot %s IPv6 for interface %s: %m",
279 enable_disable(!disabled
), link
->ifname
);
281 log_link_info(link
, "IPv6 successfully %sd", enable_disable(!disabled
));
286 void link_update_operstate(Link
*link
) {
287 LinkOperationalState operstate
;
290 if (link
->kernel_operstate
== IF_OPER_DORMANT
)
291 operstate
= LINK_OPERSTATE_DORMANT
;
292 else if (link_has_carrier(link
)) {
294 uint8_t scope
= RT_SCOPE_NOWHERE
;
297 /* if we have carrier, check what addresses we have */
298 SET_FOREACH(address
, link
->addresses
, i
) {
299 if (!address_is_ready(address
))
302 if (address
->scope
< scope
)
303 scope
= address
->scope
;
306 /* for operstate we also take foreign addresses into account */
307 SET_FOREACH(address
, link
->addresses_foreign
, i
) {
308 if (!address_is_ready(address
))
311 if (address
->scope
< scope
)
312 scope
= address
->scope
;
315 if (scope
< RT_SCOPE_SITE
)
316 /* universally accessible addresses found */
317 operstate
= LINK_OPERSTATE_ROUTABLE
;
318 else if (scope
< RT_SCOPE_HOST
)
319 /* only link or site local addresses found */
320 operstate
= LINK_OPERSTATE_DEGRADED
;
322 /* no useful addresses found */
323 operstate
= LINK_OPERSTATE_CARRIER
;
324 } else if (link
->flags
& IFF_UP
)
325 operstate
= LINK_OPERSTATE_NO_CARRIER
;
327 operstate
= LINK_OPERSTATE_OFF
;
329 if (link
->operstate
!= operstate
) {
330 link
->operstate
= operstate
;
331 link_send_changed(link
, "OperationalState", NULL
);
336 #define FLAG_STRING(string, flag, old, new) \
337 (((old ^ new) & flag) \
338 ? ((old & flag) ? (" -" string) : (" +" string)) \
341 static int link_update_flags(Link
*link
, sd_netlink_message
*m
) {
342 unsigned flags
, unknown_flags_added
, unknown_flags_removed
, unknown_flags
;
348 r
= sd_rtnl_message_link_get_flags(m
, &flags
);
350 return log_link_warning_errno(link
, r
, "Could not get link flags: %m");
352 r
= sd_netlink_message_read_u8(m
, IFLA_OPERSTATE
, &operstate
);
354 /* if we got a message without operstate, take it to mean
355 the state was unchanged */
356 operstate
= link
->kernel_operstate
;
358 if ((link
->flags
== flags
) && (link
->kernel_operstate
== operstate
))
361 if (link
->flags
!= flags
) {
362 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",
363 FLAG_STRING("LOOPBACK", IFF_LOOPBACK
, link
->flags
, flags
),
364 FLAG_STRING("MASTER", IFF_MASTER
, link
->flags
, flags
),
365 FLAG_STRING("SLAVE", IFF_SLAVE
, link
->flags
, flags
),
366 FLAG_STRING("UP", IFF_UP
, link
->flags
, flags
),
367 FLAG_STRING("DORMANT", IFF_DORMANT
, link
->flags
, flags
),
368 FLAG_STRING("LOWER_UP", IFF_LOWER_UP
, link
->flags
, flags
),
369 FLAG_STRING("RUNNING", IFF_RUNNING
, link
->flags
, flags
),
370 FLAG_STRING("MULTICAST", IFF_MULTICAST
, link
->flags
, flags
),
371 FLAG_STRING("BROADCAST", IFF_BROADCAST
, link
->flags
, flags
),
372 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT
, link
->flags
, flags
),
373 FLAG_STRING("PROMISC", IFF_PROMISC
, link
->flags
, flags
),
374 FLAG_STRING("ALLMULTI", IFF_ALLMULTI
, link
->flags
, flags
),
375 FLAG_STRING("PORTSEL", IFF_PORTSEL
, link
->flags
, flags
),
376 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA
, link
->flags
, flags
),
377 FLAG_STRING("DYNAMIC", IFF_DYNAMIC
, link
->flags
, flags
),
378 FLAG_STRING("NOARP", IFF_NOARP
, link
->flags
, flags
),
379 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS
, link
->flags
, flags
),
380 FLAG_STRING("DEBUG", IFF_DEBUG
, link
->flags
, flags
),
381 FLAG_STRING("ECHO", IFF_ECHO
, link
->flags
, flags
));
383 unknown_flags
= ~(IFF_LOOPBACK
| IFF_MASTER
| IFF_SLAVE
| IFF_UP
|
384 IFF_DORMANT
| IFF_LOWER_UP
| IFF_RUNNING
|
385 IFF_MULTICAST
| IFF_BROADCAST
| IFF_POINTOPOINT
|
386 IFF_PROMISC
| IFF_ALLMULTI
| IFF_PORTSEL
|
387 IFF_AUTOMEDIA
| IFF_DYNAMIC
| IFF_NOARP
|
388 IFF_NOTRAILERS
| IFF_DEBUG
| IFF_ECHO
);
389 unknown_flags_added
= ((link
->flags
^ flags
) & flags
& unknown_flags
);
390 unknown_flags_removed
= ((link
->flags
^ flags
) & link
->flags
& unknown_flags
);
392 /* link flags are currently at most 18 bits, let's align to
394 if (unknown_flags_added
)
396 "Unknown link flags gained: %#.5x (ignoring)",
397 unknown_flags_added
);
399 if (unknown_flags_removed
)
401 "Unknown link flags lost: %#.5x (ignoring)",
402 unknown_flags_removed
);
406 link
->kernel_operstate
= operstate
;
408 link_update_operstate(link
);
413 DEFINE_TRIVIAL_CLEANUP_FUNC(Link
*, link_unref
);
415 static int link_new(Manager
*manager
, sd_netlink_message
*message
, Link
**ret
) {
416 _cleanup_(link_unrefp
) Link
*link
= NULL
;
418 const char *ifname
, *kind
= NULL
;
420 unsigned short iftype
;
426 /* check for link kind */
427 r
= sd_netlink_message_enter_container(message
, IFLA_LINKINFO
);
429 (void) sd_netlink_message_read_string(message
, IFLA_INFO_KIND
, &kind
);
430 r
= sd_netlink_message_exit_container(message
);
435 r
= sd_netlink_message_get_type(message
, &type
);
438 else if (type
!= RTM_NEWLINK
)
441 r
= sd_rtnl_message_link_get_ifindex(message
, &ifindex
);
444 else if (ifindex
<= 0)
447 r
= sd_rtnl_message_link_get_type(message
, &iftype
);
451 r
= sd_netlink_message_read_string(message
, IFLA_IFNAME
, &ifname
);
462 .state
= LINK_STATE_PENDING
,
463 .rtnl_extended_attrs
= true,
468 link
->ifname
= strdup(ifname
);
473 link
->kind
= strdup(kind
);
478 r
= sd_netlink_message_read_u32(message
, IFLA_MASTER
, (uint32_t *)&link
->master_ifindex
);
480 log_link_debug_errno(link
, r
, "New device has no master, continuing without");
482 r
= sd_netlink_message_read_ether_addr(message
, IFLA_ADDRESS
, &link
->mac
);
484 log_link_debug_errno(link
, r
, "MAC address not found for new device, continuing without");
486 if (asprintf(&link
->state_file
, "/run/systemd/netif/links/%d", link
->ifindex
) < 0)
489 if (asprintf(&link
->lease_file
, "/run/systemd/netif/leases/%d", link
->ifindex
) < 0)
492 if (asprintf(&link
->lldp_file
, "/run/systemd/netif/lldp/%d", link
->ifindex
) < 0)
495 r
= hashmap_ensure_allocated(&manager
->links
, NULL
);
499 r
= hashmap_put(manager
->links
, INT_TO_PTR(link
->ifindex
), link
);
503 r
= link_update_flags(link
, message
);
507 *ret
= TAKE_PTR(link
);
512 static void link_detach_from_manager(Link
*link
) {
513 if (!link
|| !link
->manager
)
516 hashmap_remove(link
->manager
->links
, INT_TO_PTR(link
->ifindex
));
517 set_remove(link
->manager
->links_requesting_uuid
, link
);
520 link
->manager
= NULL
;
523 static Link
*link_free(Link
*link
) {
531 while ((route
= set_first(link
->routes
)))
534 while ((route
= set_first(link
->routes_foreign
)))
537 link
->routes
= set_free(link
->routes
);
538 link
->routes_foreign
= set_free(link
->routes_foreign
);
540 while ((address
= set_first(link
->addresses
)))
541 address_free(address
);
543 while ((address
= set_first(link
->addresses_foreign
)))
544 address_free(address
);
546 link
->addresses
= set_free(link
->addresses
);
547 link
->addresses_foreign
= set_free(link
->addresses_foreign
);
549 while ((address
= link
->pool_addresses
)) {
550 LIST_REMOVE(addresses
, link
->pool_addresses
, address
);
551 address_free(address
);
554 sd_dhcp_server_unref(link
->dhcp_server
);
555 sd_dhcp_client_unref(link
->dhcp_client
);
556 sd_dhcp_lease_unref(link
->dhcp_lease
);
558 link_lldp_emit_stop(link
);
560 free(link
->lease_file
);
562 sd_lldp_unref(link
->lldp
);
563 free(link
->lldp_file
);
567 sd_ipv4ll_unref(link
->ipv4ll
);
568 sd_dhcp6_client_unref(link
->dhcp6_client
);
569 sd_ndisc_unref(link
->ndisc
);
570 sd_radv_unref(link
->radv
);
572 link_detach_from_manager(link
);
578 (void) unlink(link
->state_file
);
579 free(link
->state_file
);
581 sd_device_unref(link
->sd_device
);
583 HASHMAP_FOREACH (carrier
, link
->bound_to_links
, i
)
584 hashmap_remove(link
->bound_to_links
, INT_TO_PTR(carrier
->ifindex
));
585 hashmap_free(link
->bound_to_links
);
587 HASHMAP_FOREACH (carrier
, link
->bound_by_links
, i
)
588 hashmap_remove(link
->bound_by_links
, INT_TO_PTR(carrier
->ifindex
));
589 hashmap_free(link
->bound_by_links
);
594 DEFINE_TRIVIAL_REF_UNREF_FUNC(Link
, link
, link_free
);
596 int link_get(Manager
*m
, int ifindex
, Link
**ret
) {
603 link
= hashmap_get(m
->links
, INT_TO_PTR(ifindex
));
612 static void link_set_state(Link
*link
, LinkState state
) {
615 if (link
->state
== state
)
620 link_send_changed(link
, "AdministrativeState", NULL
);
623 static void link_enter_unmanaged(Link
*link
) {
626 log_link_debug(link
, "Unmanaged");
628 link_set_state(link
, LINK_STATE_UNMANAGED
);
633 static int link_stop_clients(Link
*link
) {
637 assert(link
->manager
);
638 assert(link
->manager
->event
);
640 if (link
->dhcp_client
) {
641 k
= sd_dhcp_client_stop(link
->dhcp_client
);
643 r
= log_link_warning_errno(link
, k
, "Could not stop DHCPv4 client: %m");
647 k
= sd_ipv4ll_stop(link
->ipv4ll
);
649 r
= log_link_warning_errno(link
, k
, "Could not stop IPv4 link-local: %m");
652 if (link
->dhcp6_client
) {
653 k
= sd_dhcp6_client_stop(link
->dhcp6_client
);
655 r
= log_link_warning_errno(link
, k
, "Could not stop DHCPv6 client: %m");
659 k
= sd_ndisc_stop(link
->ndisc
);
661 r
= log_link_warning_errno(link
, k
, "Could not stop IPv6 Router Discovery: %m");
665 k
= sd_radv_stop(link
->radv
);
667 r
= log_link_warning_errno(link
, k
, "Could not stop IPv6 Router Advertisement: %m");
670 link_lldp_emit_stop(link
);
674 void link_enter_failed(Link
*link
) {
677 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
680 log_link_warning(link
, "Failed");
682 link_set_state(link
, LINK_STATE_FAILED
);
684 link_stop_clients(link
);
689 static Address
* link_find_dhcp_server_address(Link
*link
) {
693 assert(link
->network
);
695 /* The first statically configured address if there is any */
696 LIST_FOREACH(addresses
, address
, link
->network
->static_addresses
) {
698 if (address
->family
!= AF_INET
)
701 if (in_addr_is_null(address
->family
, &address
->in_addr
))
707 /* If that didn't work, find a suitable address we got from the pool */
708 LIST_FOREACH(addresses
, address
, link
->pool_addresses
) {
709 if (address
->family
!= AF_INET
)
718 static void link_enter_configured(Link
*link
) {
720 assert(link
->network
);
722 if (link
->state
!= LINK_STATE_CONFIGURING
)
725 log_link_info(link
, "Configured");
727 link_set_state(link
, LINK_STATE_CONFIGURED
);
732 void link_check_ready(Link
*link
) {
738 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
744 if (!link
->addresses_configured
)
747 if (!link
->static_routes_configured
)
750 if (!link
->routing_policy_rules_configured
)
753 if (link_ipv4ll_enabled(link
))
754 if (!link
->ipv4ll_address
||
758 if (!link
->network
->bridge
) {
760 if (link_ipv6ll_enabled(link
))
761 if (in_addr_is_null(AF_INET6
, (const union in_addr_union
*) &link
->ipv6ll_address
) > 0)
764 if ((link_dhcp4_enabled(link
) && !link_dhcp6_enabled(link
) &&
765 !link
->dhcp4_configured
) ||
766 (link_dhcp6_enabled(link
) && !link_dhcp4_enabled(link
) &&
767 !link
->dhcp6_configured
) ||
768 (link_dhcp4_enabled(link
) && link_dhcp6_enabled(link
) &&
769 !link
->dhcp4_configured
&& !link
->dhcp6_configured
))
772 if (link_ipv6_accept_ra_enabled(link
) && !link
->ndisc_configured
)
776 SET_FOREACH(a
, link
->addresses
, i
)
777 if (!address_is_ready(a
))
780 if (link
->state
!= LINK_STATE_CONFIGURED
)
781 link_enter_configured(link
);
786 static int link_set_routing_policy_rule(Link
*link
) {
787 RoutingPolicyRule
*rule
, *rrule
= NULL
;
791 assert(link
->network
);
793 LIST_FOREACH(rules
, rule
, link
->network
->rules
) {
794 r
= routing_policy_rule_get(link
->manager
, rule
->family
, &rule
->from
, rule
->from_prefixlen
, &rule
->to
,
795 rule
->to_prefixlen
, rule
->tos
, rule
->fwmark
, rule
->table
, rule
->iif
, rule
->oif
,
796 rule
->protocol
, &rule
->sport
, &rule
->dport
, &rrule
);
798 (void) routing_policy_rule_make_local(link
->manager
, rrule
);
802 r
= routing_policy_rule_configure(rule
, link
, NULL
, false);
804 log_link_warning_errno(link
, r
, "Could not set routing policy rules: %m");
805 link_enter_failed(link
);
809 link
->routing_policy_rule_messages
++;
812 routing_policy_rule_purge(link
->manager
, link
);
813 if (link
->routing_policy_rule_messages
== 0) {
814 link
->routing_policy_rules_configured
= true;
815 link_check_ready(link
);
817 log_link_debug(link
, "Setting routing policy rules");
822 static int route_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
826 assert(link
->route_messages
> 0);
827 assert(IN_SET(link
->state
, LINK_STATE_CONFIGURING
,
828 LINK_STATE_FAILED
, LINK_STATE_LINGER
));
830 link
->route_messages
--;
832 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
835 r
= sd_netlink_message_get_errno(m
);
836 if (r
< 0 && r
!= -EEXIST
)
837 log_link_warning_errno(link
, r
, "Could not set route: %m");
839 if (link
->route_messages
== 0) {
840 log_link_debug(link
, "Routes set");
841 link
->static_routes_configured
= true;
842 link_check_ready(link
);
848 static int link_request_set_routes(Link
*link
) {
850 PHASE_NON_GATEWAY
, /* First phase: Routes without a gateway */
851 PHASE_GATEWAY
, /* Second phase: Routes with a gateway */
858 assert(link
->network
);
859 assert(link
->addresses_configured
);
860 assert(link
->address_messages
== 0);
861 assert(link
->state
!= _LINK_STATE_INVALID
);
863 link_set_state(link
, LINK_STATE_CONFIGURING
);
865 (void) link_set_routing_policy_rule(link
);
867 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
868 for (phase
= 0; phase
< _PHASE_MAX
; phase
++)
869 LIST_FOREACH(routes
, rt
, link
->network
->static_routes
) {
871 if (in_addr_is_null(rt
->family
, &rt
->gw
) != (phase
== PHASE_NON_GATEWAY
))
874 r
= route_configure(rt
, link
, route_handler
);
876 log_link_warning_errno(link
, r
, "Could not set routes: %m");
877 link_enter_failed(link
);
881 link
->route_messages
++;
884 if (link
->route_messages
== 0) {
885 link
->static_routes_configured
= true;
886 link_check_ready(link
);
888 log_link_debug(link
, "Setting routes");
893 static int address_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
899 assert(link
->ifname
);
900 assert(link
->address_messages
> 0);
901 assert(IN_SET(link
->state
, LINK_STATE_CONFIGURING
,
902 LINK_STATE_FAILED
, LINK_STATE_LINGER
));
904 link
->address_messages
--;
906 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
909 r
= sd_netlink_message_get_errno(m
);
910 if (r
< 0 && r
!= -EEXIST
)
911 log_link_warning_errno(link
, r
, "could not set address: %m");
913 manager_rtnl_process_address(rtnl
, m
, link
->manager
);
915 if (link
->address_messages
== 0) {
916 log_link_debug(link
, "Addresses set");
917 link
->addresses_configured
= true;
918 link_request_set_routes(link
);
924 static int link_push_uplink_dns_to_dhcp_server(Link
*link
, sd_dhcp_server
*s
) {
925 _cleanup_free_
struct in_addr
*addresses
= NULL
;
926 size_t n_addresses
= 0, n_allocated
= 0;
929 log_debug("Copying DNS server information from %s", link
->ifname
);
934 for (i
= 0; i
< link
->network
->n_dns
; i
++) {
937 /* Only look for IPv4 addresses */
938 if (link
->network
->dns
[i
].family
!= AF_INET
)
941 ia
= link
->network
->dns
[i
].address
.in
;
943 /* Never propagate obviously borked data */
944 if (in4_addr_is_null(&ia
) || in4_addr_is_localhost(&ia
))
947 if (!GREEDY_REALLOC(addresses
, n_allocated
, n_addresses
+ 1))
950 addresses
[n_addresses
++] = ia
;
953 if (link
->network
->dhcp_use_dns
&& link
->dhcp_lease
) {
954 const struct in_addr
*da
= NULL
;
957 n
= sd_dhcp_lease_get_dns(link
->dhcp_lease
, &da
);
960 if (!GREEDY_REALLOC(addresses
, n_allocated
, n_addresses
+ n
))
963 memcpy(addresses
+ n_addresses
, da
, n
* sizeof(struct in_addr
));
968 if (n_addresses
<= 0)
971 return sd_dhcp_server_set_dns(s
, addresses
, n_addresses
);
974 static int link_push_uplink_ntp_to_dhcp_server(Link
*link
, sd_dhcp_server
*s
) {
975 _cleanup_free_
struct in_addr
*addresses
= NULL
;
976 size_t n_addresses
= 0, n_allocated
= 0;
982 log_debug("Copying NTP server information from %s", link
->ifname
);
984 STRV_FOREACH(a
, link
->network
->ntp
) {
987 /* Only look for IPv4 addresses */
988 if (inet_pton(AF_INET
, *a
, &ia
) <= 0)
991 /* Never propagate obviously borked data */
992 if (in4_addr_is_null(&ia
) || in4_addr_is_localhost(&ia
))
995 if (!GREEDY_REALLOC(addresses
, n_allocated
, n_addresses
+ 1))
998 addresses
[n_addresses
++] = ia
;
1001 if (link
->network
->dhcp_use_ntp
&& link
->dhcp_lease
) {
1002 const struct in_addr
*da
= NULL
;
1005 n
= sd_dhcp_lease_get_ntp(link
->dhcp_lease
, &da
);
1008 if (!GREEDY_REALLOC(addresses
, n_allocated
, n_addresses
+ n
))
1011 memcpy(addresses
+ n_addresses
, da
, n
* sizeof(struct in_addr
));
1016 if (n_addresses
<= 0)
1019 return sd_dhcp_server_set_ntp(s
, addresses
, n_addresses
);
1022 static int link_set_bridge_fdb(Link
*link
) {
1023 FdbEntry
*fdb_entry
;
1026 LIST_FOREACH(static_fdb_entries
, fdb_entry
, link
->network
->static_fdb_entries
) {
1027 r
= fdb_entry_configure(link
, fdb_entry
);
1029 return log_link_error_errno(link
, r
, "Failed to add MAC entry to static MAC table: %m");
1035 static int link_request_set_addresses(Link
*link
) {
1036 AddressLabel
*label
;
1041 assert(link
->network
);
1042 assert(link
->state
!= _LINK_STATE_INVALID
);
1044 r
= link_set_bridge_fdb(link
);
1048 link_set_state(link
, LINK_STATE_CONFIGURING
);
1050 LIST_FOREACH(addresses
, ad
, link
->network
->static_addresses
) {
1051 r
= address_configure(ad
, link
, address_handler
, false);
1053 log_link_warning_errno(link
, r
, "Could not set addresses: %m");
1054 link_enter_failed(link
);
1058 link
->address_messages
++;
1061 LIST_FOREACH(labels
, label
, link
->network
->address_labels
) {
1062 r
= address_label_configure(label
, link
, NULL
, false);
1064 log_link_warning_errno(link
, r
, "Could not set address label: %m");
1065 link_enter_failed(link
);
1069 link
->address_label_messages
++;
1072 /* now that we can figure out a default address for the dhcp server,
1074 if (link_dhcp4_server_enabled(link
) && (link
->flags
& IFF_UP
)) {
1076 Link
*uplink
= NULL
;
1077 bool acquired_uplink
= false;
1079 address
= link_find_dhcp_server_address(link
);
1081 log_link_warning(link
, "Failed to find suitable address for DHCPv4 server instance.");
1082 link_enter_failed(link
);
1086 /* use the server address' subnet as the pool */
1087 r
= sd_dhcp_server_configure_pool(link
->dhcp_server
, &address
->in_addr
.in
, address
->prefixlen
,
1088 link
->network
->dhcp_server_pool_offset
, link
->network
->dhcp_server_pool_size
);
1093 r = sd_dhcp_server_set_router(link->dhcp_server,
1094 &main_address->in_addr.in);
1099 if (link
->network
->dhcp_server_max_lease_time_usec
> 0) {
1100 r
= sd_dhcp_server_set_max_lease_time(
1102 DIV_ROUND_UP(link
->network
->dhcp_server_max_lease_time_usec
, USEC_PER_SEC
));
1107 if (link
->network
->dhcp_server_default_lease_time_usec
> 0) {
1108 r
= sd_dhcp_server_set_default_lease_time(
1110 DIV_ROUND_UP(link
->network
->dhcp_server_default_lease_time_usec
, USEC_PER_SEC
));
1115 if (link
->network
->dhcp_server_emit_dns
) {
1117 if (link
->network
->n_dhcp_server_dns
> 0)
1118 r
= sd_dhcp_server_set_dns(link
->dhcp_server
, link
->network
->dhcp_server_dns
, link
->network
->n_dhcp_server_dns
);
1120 uplink
= manager_find_uplink(link
->manager
, link
);
1121 acquired_uplink
= true;
1124 log_link_debug(link
, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1127 r
= link_push_uplink_dns_to_dhcp_server(uplink
, link
->dhcp_server
);
1130 log_link_warning_errno(link
, r
, "Failed to set DNS server for DHCP server, ignoring: %m");
1133 if (link
->network
->dhcp_server_emit_ntp
) {
1135 if (link
->network
->n_dhcp_server_ntp
> 0)
1136 r
= sd_dhcp_server_set_ntp(link
->dhcp_server
, link
->network
->dhcp_server_ntp
, link
->network
->n_dhcp_server_ntp
);
1138 if (!acquired_uplink
)
1139 uplink
= manager_find_uplink(link
->manager
, link
);
1142 log_link_debug(link
, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1145 r
= link_push_uplink_ntp_to_dhcp_server(uplink
, link
->dhcp_server
);
1149 log_link_warning_errno(link
, r
, "Failed to set NTP server for DHCP server, ignoring: %m");
1152 r
= sd_dhcp_server_set_emit_router(link
->dhcp_server
, link
->network
->dhcp_server_emit_router
);
1154 return log_link_warning_errno(link
, r
, "Failed to set router emission for DHCP server: %m");
1156 if (link
->network
->dhcp_server_emit_timezone
) {
1157 _cleanup_free_
char *buffer
= NULL
;
1158 const char *tz
= NULL
;
1160 if (link
->network
->dhcp_server_timezone
)
1161 tz
= link
->network
->dhcp_server_timezone
;
1163 r
= get_timezone(&buffer
);
1165 log_warning_errno(r
, "Failed to determine timezone: %m");
1171 r
= sd_dhcp_server_set_timezone(link
->dhcp_server
, tz
);
1177 r
= sd_dhcp_server_start(link
->dhcp_server
);
1179 log_link_warning_errno(link
, r
, "Could not start DHCPv4 server instance: %m");
1181 link_enter_failed(link
);
1186 log_link_debug(link
, "Offering DHCPv4 leases");
1189 if (link
->address_messages
== 0) {
1190 link
->addresses_configured
= true;
1191 link_request_set_routes(link
);
1193 log_link_debug(link
, "Setting addresses");
1198 static int link_set_bridge_vlan(Link
*link
) {
1201 r
= br_vlan_configure(link
, link
->network
->pvid
, link
->network
->br_vid_bitmap
, link
->network
->br_untagged_bitmap
);
1203 log_link_error_errno(link
, r
, "Failed to assign VLANs to bridge port: %m");
1208 static int link_set_proxy_arp(Link
*link
) {
1209 const char *p
= NULL
;
1212 if (!link_proxy_arp_enabled(link
))
1215 p
= strjoina("/proc/sys/net/ipv4/conf/", link
->ifname
, "/proxy_arp");
1217 r
= write_string_file(p
, one_zero(link
->network
->proxy_arp
), WRITE_STRING_FILE_VERIFY_ON_FAILURE
| WRITE_STRING_FILE_DISABLE_BUFFER
);
1219 log_link_warning_errno(link
, r
, "Cannot configure proxy ARP for interface: %m");
1224 static int link_set_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1229 log_link_debug(link
, "Set link");
1231 r
= sd_netlink_message_get_errno(m
);
1232 if (r
< 0 && r
!= -EEXIST
) {
1233 log_link_error_errno(link
, r
, "Could not join netdev: %m");
1234 link_enter_failed(link
);
1240 static int link_configure_after_setting_mtu(Link
*link
);
1242 static int set_mtu_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1247 assert(link
->ifname
);
1249 link
->setting_mtu
= false;
1251 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1254 r
= sd_netlink_message_get_errno(m
);
1256 log_link_warning_errno(link
, r
, "Could not set MTU: %m");
1260 log_link_debug(link
, "Setting MTU done.");
1262 if (link
->state
== LINK_STATE_PENDING
)
1263 (void) link_configure_after_setting_mtu(link
);
1268 int link_set_mtu(Link
*link
, uint32_t mtu
) {
1269 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1273 assert(link
->manager
);
1274 assert(link
->manager
->rtnl
);
1276 if (link
->mtu
== mtu
|| link
->setting_mtu
)
1279 log_link_debug(link
, "Setting MTU: %" PRIu32
, mtu
);
1281 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1283 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1285 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
1286 * for this interface, or if it is a bridge slave, then disable IPv6 else enable it. */
1287 (void) link_enable_ipv6(link
);
1289 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
1290 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1291 if (link_ipv6_enabled(link
) && mtu
< IPV6_MIN_MTU
) {
1293 log_link_warning(link
, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU
) ", as "
1294 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU
) " bytes: %m");
1299 r
= sd_netlink_message_append_u32(req
, IFLA_MTU
, mtu
);
1301 return log_link_error_errno(link
, r
, "Could not append MTU: %m");
1303 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, set_mtu_handler
,
1304 link_netlink_destroy_callback
, link
);
1306 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1309 link
->setting_mtu
= true;
1314 static int set_flags_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1319 assert(link
->ifname
);
1321 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1324 r
= sd_netlink_message_get_errno(m
);
1326 log_link_warning_errno(link
, r
, "Could not set link flags: %m");
1331 static int link_set_flags(Link
*link
) {
1332 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1333 unsigned ifi_change
= 0;
1334 unsigned ifi_flags
= 0;
1338 assert(link
->manager
);
1339 assert(link
->manager
->rtnl
);
1341 if (link
->flags
& IFF_LOOPBACK
)
1347 if (link
->network
->arp
< 0 && link
->network
->multicast
< 0 && link
->network
->allmulticast
< 0)
1350 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1352 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1354 if (link
->network
->arp
>= 0) {
1355 ifi_change
|= IFF_NOARP
;
1356 SET_FLAG(ifi_flags
, IFF_NOARP
, link
->network
->arp
== 0);
1359 if (link
->network
->multicast
>= 0) {
1360 ifi_change
|= IFF_MULTICAST
;
1361 SET_FLAG(ifi_flags
, IFF_MULTICAST
, link
->network
->multicast
);
1364 if (link
->network
->allmulticast
>= 0) {
1365 ifi_change
|= IFF_ALLMULTI
;
1366 SET_FLAG(ifi_flags
, IFF_ALLMULTI
, link
->network
->allmulticast
);
1369 r
= sd_rtnl_message_link_set_flags(req
, ifi_flags
, ifi_change
);
1371 return log_link_error_errno(link
, r
, "Could not set link flags: %m");
1373 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, set_flags_handler
,
1374 link_netlink_destroy_callback
, link
);
1376 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1383 static int link_set_bridge(Link
*link
) {
1384 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1388 assert(link
->network
);
1390 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1392 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1394 r
= sd_rtnl_message_link_set_family(req
, PF_BRIDGE
);
1396 return log_link_error_errno(link
, r
, "Could not set message family: %m");
1398 r
= sd_netlink_message_open_container(req
, IFLA_PROTINFO
);
1400 return log_link_error_errno(link
, r
, "Could not append IFLA_PROTINFO attribute: %m");
1402 if (link
->network
->use_bpdu
>= 0) {
1403 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_GUARD
, link
->network
->use_bpdu
);
1405 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1408 if (link
->network
->hairpin
>= 0) {
1409 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_MODE
, link
->network
->hairpin
);
1411 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_MODE attribute: %m");
1414 if (link
->network
->fast_leave
>= 0) {
1415 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_FAST_LEAVE
, link
->network
->fast_leave
);
1417 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1420 if (link
->network
->allow_port_to_be_root
>= 0) {
1421 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_PROTECT
, link
->network
->allow_port_to_be_root
);
1423 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
1427 if (link
->network
->unicast_flood
>= 0) {
1428 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_UNICAST_FLOOD
, link
->network
->unicast_flood
);
1430 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
1433 if (link
->network
->multicast_to_unicast
>= 0) {
1434 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_MCAST_TO_UCAST
, link
->network
->multicast_to_unicast
);
1436 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_MCAST_TO_UCAST attribute: %m");
1439 if (link
->network
->cost
!= 0) {
1440 r
= sd_netlink_message_append_u32(req
, IFLA_BRPORT_COST
, link
->network
->cost
);
1442 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_COST attribute: %m");
1445 if (link
->network
->priority
!= LINK_BRIDGE_PORT_PRIORITY_INVALID
) {
1446 r
= sd_netlink_message_append_u16(req
, IFLA_BRPORT_PRIORITY
, link
->network
->priority
);
1448 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1451 r
= sd_netlink_message_close_container(req
);
1453 return log_link_error_errno(link
, r
, "Could not append IFLA_LINKINFO attribute: %m");
1455 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, link_set_handler
,
1456 link_netlink_destroy_callback
, link
);
1458 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1465 static int link_bond_set(Link
*link
) {
1466 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1470 assert(link
->network
);
1472 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_NEWLINK
, link
->network
->bond
->ifindex
);
1474 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1476 r
= sd_netlink_message_set_flags(req
, NLM_F_REQUEST
| NLM_F_ACK
);
1478 return log_link_error_errno(link
, r
, "Could not set netlink flags: %m");
1480 r
= sd_netlink_message_open_container(req
, IFLA_LINKINFO
);
1482 return log_link_error_errno(link
, r
, "Could not append IFLA_PROTINFO attribute: %m");
1484 r
= sd_netlink_message_open_container_union(req
, IFLA_INFO_DATA
, "bond");
1486 return log_link_error_errno(link
, r
, "Could not append IFLA_INFO_DATA attribute: %m");
1488 if (link
->network
->active_slave
) {
1489 r
= sd_netlink_message_append_u32(req
, IFLA_BOND_ACTIVE_SLAVE
, link
->ifindex
);
1491 return log_link_error_errno(link
, r
, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1494 if (link
->network
->primary_slave
) {
1495 r
= sd_netlink_message_append_u32(req
, IFLA_BOND_PRIMARY
, link
->ifindex
);
1497 return log_link_error_errno(link
, r
, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1500 r
= sd_netlink_message_close_container(req
);
1502 return log_link_error_errno(link
, r
, "Could not append IFLA_LINKINFO attribute: %m");
1504 r
= sd_netlink_message_close_container(req
);
1506 return log_link_error_errno(link
, r
, "Could not append IFLA_INFO_DATA attribute: %m");
1508 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, set_flags_handler
,
1509 link_netlink_destroy_callback
, link
);
1511 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1518 static int link_lldp_save(Link
*link
) {
1519 _cleanup_free_
char *temp_path
= NULL
;
1520 _cleanup_fclose_
FILE *f
= NULL
;
1521 sd_lldp_neighbor
**l
= NULL
;
1525 assert(link
->lldp_file
);
1528 (void) unlink(link
->lldp_file
);
1532 r
= sd_lldp_get_neighbors(link
->lldp
, &l
);
1536 (void) unlink(link
->lldp_file
);
1542 r
= fopen_temporary(link
->lldp_file
, &f
, &temp_path
);
1546 fchmod(fileno(f
), 0644);
1548 for (i
= 0; i
< n
; i
++) {
1553 r
= sd_lldp_neighbor_get_raw(l
[i
], &p
, &sz
);
1558 (void) fwrite(&u
, 1, sizeof(u
), f
);
1559 (void) fwrite(p
, 1, sz
, f
);
1562 r
= fflush_and_check(f
);
1566 if (rename(temp_path
, link
->lldp_file
) < 0) {
1573 (void) unlink(link
->lldp_file
);
1575 (void) unlink(temp_path
);
1577 log_link_error_errno(link
, r
, "Failed to save LLDP data to %s: %m", link
->lldp_file
);
1581 for (i
= 0; i
< n
; i
++)
1582 sd_lldp_neighbor_unref(l
[i
]);
1589 static void lldp_handler(sd_lldp
*lldp
, sd_lldp_event event
, sd_lldp_neighbor
*n
, void *userdata
) {
1590 Link
*link
= userdata
;
1595 (void) link_lldp_save(link
);
1597 if (link_lldp_emit_enabled(link
) && event
== SD_LLDP_EVENT_ADDED
) {
1598 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1600 log_link_debug(link
, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1602 r
= link_lldp_emit_start(link
);
1604 log_link_warning_errno(link
, r
, "Failed to restart LLDP transmission: %m");
1608 static int link_acquire_ipv6_conf(Link
*link
) {
1613 if (link_ipv6_accept_ra_enabled(link
)) {
1614 assert(link
->ndisc
);
1616 log_link_debug(link
, "Discovering IPv6 routers");
1618 r
= sd_ndisc_start(link
->ndisc
);
1619 if (r
< 0 && r
!= -EBUSY
)
1620 return log_link_warning_errno(link
, r
, "Could not start IPv6 Router Discovery: %m");
1623 if (link_radv_enabled(link
)) {
1625 assert(in_addr_is_link_local(AF_INET6
, (const union in_addr_union
*)&link
->ipv6ll_address
) > 0);
1627 log_link_debug(link
, "Starting IPv6 Router Advertisements");
1629 r
= sd_radv_start(link
->radv
);
1630 if (r
< 0 && r
!= -EBUSY
)
1631 return log_link_warning_errno(link
, r
, "Could not start IPv6 Router Advertisement: %m");
1634 (void) dhcp6_request_prefix_delegation(link
);
1639 static int link_acquire_ipv4_conf(Link
*link
) {
1643 assert(link
->network
);
1644 assert(link
->manager
);
1645 assert(link
->manager
->event
);
1647 if (link_ipv4ll_enabled(link
)) {
1648 assert(link
->ipv4ll
);
1650 log_link_debug(link
, "Acquiring IPv4 link-local address");
1652 r
= sd_ipv4ll_start(link
->ipv4ll
);
1654 return log_link_warning_errno(link
, r
, "Could not acquire IPv4 link-local address: %m");
1657 if (link_dhcp4_enabled(link
)) {
1658 assert(link
->dhcp_client
);
1660 log_link_debug(link
, "Acquiring DHCPv4 lease");
1662 r
= sd_dhcp_client_start(link
->dhcp_client
);
1664 return log_link_warning_errno(link
, r
, "Could not acquire DHCPv4 lease: %m");
1670 static int link_acquire_conf(Link
*link
) {
1675 r
= link_acquire_ipv4_conf(link
);
1679 if (in_addr_is_null(AF_INET6
, (const union in_addr_union
*) &link
->ipv6ll_address
) == 0) {
1680 r
= link_acquire_ipv6_conf(link
);
1685 if (link_lldp_emit_enabled(link
)) {
1686 r
= link_lldp_emit_start(link
);
1688 return log_link_warning_errno(link
, r
, "Failed to start LLDP transmission: %m");
1694 bool link_has_carrier(Link
*link
) {
1695 /* see Documentation/networking/operstates.txt in the kernel sources */
1697 if (link
->kernel_operstate
== IF_OPER_UP
)
1700 if (link
->kernel_operstate
== IF_OPER_UNKNOWN
)
1701 /* operstate may not be implemented, so fall back to flags */
1702 if ((link
->flags
& IFF_LOWER_UP
) && !(link
->flags
& IFF_DORMANT
))
1708 static int link_up_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1713 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1716 r
= sd_netlink_message_get_errno(m
);
1718 /* we warn but don't fail the link, as it may be brought up later */
1719 log_link_warning_errno(link
, r
, "Could not bring up interface: %m");
1724 int link_up(Link
*link
) {
1725 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1726 uint8_t ipv6ll_mode
;
1730 assert(link
->network
);
1731 assert(link
->manager
);
1732 assert(link
->manager
->rtnl
);
1734 log_link_debug(link
, "Bringing link up");
1736 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1738 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1740 /* set it free if not enslaved with networkd */
1741 if (!link
->network
->bridge
&& !link
->network
->bond
&& !link
->network
->vrf
) {
1742 r
= sd_netlink_message_append_u32(req
, IFLA_MASTER
, 0);
1744 return log_link_error_errno(link
, r
, "Could not append IFLA_MASTER attribute: %m");
1747 r
= sd_rtnl_message_link_set_flags(req
, IFF_UP
, IFF_UP
);
1749 return log_link_error_errno(link
, r
, "Could not set link flags: %m");
1751 if (link
->network
->mac
) {
1752 r
= sd_netlink_message_append_ether_addr(req
, IFLA_ADDRESS
, link
->network
->mac
);
1754 return log_link_error_errno(link
, r
, "Could not set MAC address: %m");
1757 r
= sd_netlink_message_open_container(req
, IFLA_AF_SPEC
);
1759 return log_link_error_errno(link
, r
, "Could not open IFLA_AF_SPEC container: %m");
1761 if (link_ipv6_enabled(link
)) {
1762 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1763 r
= sd_netlink_message_open_container(req
, AF_INET6
);
1765 return log_link_error_errno(link
, r
, "Could not open AF_INET6 container: %m");
1767 if (!link_ipv6ll_enabled(link
))
1768 ipv6ll_mode
= IN6_ADDR_GEN_MODE_NONE
;
1770 const char *p
= NULL
;
1771 _cleanup_free_
char *stable_secret
= NULL
;
1773 p
= strjoina("/proc/sys/net/ipv6/conf/", link
->ifname
, "/stable_secret");
1774 r
= read_one_line_file(p
, &stable_secret
);
1777 ipv6ll_mode
= IN6_ADDR_GEN_MODE_EUI64
;
1779 ipv6ll_mode
= IN6_ADDR_GEN_MODE_STABLE_PRIVACY
;
1781 r
= sd_netlink_message_append_u8(req
, IFLA_INET6_ADDR_GEN_MODE
, ipv6ll_mode
);
1783 return log_link_error_errno(link
, r
, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1785 if (!in_addr_is_null(AF_INET6
, &link
->network
->ipv6_token
)) {
1786 r
= sd_netlink_message_append_in6_addr(req
, IFLA_INET6_TOKEN
, &link
->network
->ipv6_token
.in6
);
1788 return log_link_error_errno(link
, r
, "Could not append IFLA_INET6_TOKEN: %m");
1791 r
= sd_netlink_message_close_container(req
);
1793 return log_link_error_errno(link
, r
, "Could not close AF_INET6 container: %m");
1796 r
= sd_netlink_message_close_container(req
);
1798 return log_link_error_errno(link
, r
, "Could not close IFLA_AF_SPEC container: %m");
1800 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, link_up_handler
,
1801 link_netlink_destroy_callback
, link
);
1803 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1810 static int link_up_can(Link
*link
) {
1811 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1816 log_link_debug(link
, "Bringing CAN link up");
1818 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1820 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1822 r
= sd_rtnl_message_link_set_flags(req
, IFF_UP
, IFF_UP
);
1824 return log_link_error_errno(link
, r
, "Could not set link flags: %m");
1826 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, link_up_handler
,
1827 link_netlink_destroy_callback
, link
);
1829 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1836 static int link_set_can(Link
*link
) {
1837 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*m
= NULL
;
1841 assert(link
->network
);
1842 assert(link
->manager
);
1843 assert(link
->manager
->rtnl
);
1845 log_link_debug(link
, "link_set_can");
1847 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &m
, RTM_NEWLINK
, link
->ifindex
);
1849 return log_link_error_errno(link
, r
, "Failed to allocate netlink message: %m");
1851 r
= sd_netlink_message_set_flags(m
, NLM_F_REQUEST
| NLM_F_ACK
);
1853 return log_link_error_errno(link
, r
, "Could not set netlink flags: %m");
1855 r
= sd_netlink_message_open_container(m
, IFLA_LINKINFO
);
1857 return log_link_error_errno(link
, r
, "Failed to open netlink container: %m");
1859 r
= sd_netlink_message_open_container_union(m
, IFLA_INFO_DATA
, link
->kind
);
1861 return log_link_error_errno(link
, r
, "Could not append IFLA_INFO_DATA attribute: %m");
1863 if (link
->network
->can_bitrate
> 0 || link
->network
->can_sample_point
> 0) {
1864 struct can_bittiming bt
= {
1865 .bitrate
= link
->network
->can_bitrate
,
1866 .sample_point
= link
->network
->can_sample_point
,
1869 if (link
->network
->can_bitrate
> UINT32_MAX
) {
1870 log_link_error(link
, "bitrate (%zu) too big.", link
->network
->can_bitrate
);
1874 log_link_debug(link
, "Setting bitrate = %d bit/s", bt
.bitrate
);
1875 if (link
->network
->can_sample_point
> 0)
1876 log_link_debug(link
, "Setting sample point = %d.%d%%", bt
.sample_point
/ 10, bt
.sample_point
% 10);
1878 log_link_debug(link
, "Using default sample point");
1880 r
= sd_netlink_message_append_data(m
, IFLA_CAN_BITTIMING
, &bt
, sizeof(bt
));
1882 return log_link_error_errno(link
, r
, "Could not append IFLA_CAN_BITTIMING attribute: %m");
1885 if (link
->network
->can_restart_us
> 0) {
1886 char time_string
[FORMAT_TIMESPAN_MAX
];
1887 uint64_t restart_ms
;
1889 if (link
->network
->can_restart_us
== USEC_INFINITY
)
1892 restart_ms
= DIV_ROUND_UP(link
->network
->can_restart_us
, USEC_PER_MSEC
);
1894 format_timespan(time_string
, FORMAT_TIMESPAN_MAX
, restart_ms
* 1000, MSEC_PER_SEC
);
1896 if (restart_ms
> UINT32_MAX
) {
1897 log_link_error(link
, "restart timeout (%s) too big.", time_string
);
1901 log_link_debug(link
, "Setting restart = %s", time_string
);
1903 r
= sd_netlink_message_append_u32(m
, IFLA_CAN_RESTART_MS
, restart_ms
);
1905 return log_link_error_errno(link
, r
, "Could not append IFLA_CAN_RESTART_MS attribute: %m");
1908 r
= sd_netlink_message_close_container(m
);
1910 return log_link_error_errno(link
, r
, "Failed to close netlink container: %m");
1912 r
= sd_netlink_message_close_container(m
);
1914 return log_link_error_errno(link
, r
, "Failed to close netlink container: %m");
1916 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, m
, link_set_handler
,
1917 link_netlink_destroy_callback
, link
);
1919 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1923 if (!(link
->flags
& IFF_UP
)) {
1924 r
= link_up_can(link
);
1926 link_enter_failed(link
);
1931 log_link_debug(link
, "link_set_can done");
1936 static int link_down_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1941 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1944 r
= sd_netlink_message_get_errno(m
);
1946 log_link_warning_errno(link
, r
, "Could not bring down interface: %m");
1948 if (streq_ptr(link
->kind
, "can"))
1954 int link_down(Link
*link
) {
1955 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1959 assert(link
->manager
);
1960 assert(link
->manager
->rtnl
);
1962 log_link_debug(link
, "Bringing link down");
1964 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
,
1965 RTM_SETLINK
, link
->ifindex
);
1967 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1969 r
= sd_rtnl_message_link_set_flags(req
, 0, IFF_UP
);
1971 return log_link_error_errno(link
, r
, "Could not set link flags: %m");
1973 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, link_down_handler
,
1974 link_netlink_destroy_callback
, link
);
1976 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1983 static int link_handle_bound_to_list(Link
*link
) {
1987 bool required_up
= false;
1988 bool link_is_up
= false;
1992 if (hashmap_isempty(link
->bound_to_links
))
1995 if (link
->flags
& IFF_UP
)
1998 HASHMAP_FOREACH (l
, link
->bound_to_links
, i
)
1999 if (link_has_carrier(l
)) {
2004 if (!required_up
&& link_is_up
) {
2005 r
= link_down(link
);
2008 } else if (required_up
&& !link_is_up
) {
2017 static int link_handle_bound_by_list(Link
*link
) {
2024 if (hashmap_isempty(link
->bound_by_links
))
2027 HASHMAP_FOREACH (l
, link
->bound_by_links
, i
) {
2028 r
= link_handle_bound_to_list(l
);
2036 static int link_put_carrier(Link
*link
, Link
*carrier
, Hashmap
**h
) {
2042 if (link
== carrier
)
2045 if (hashmap_get(*h
, INT_TO_PTR(carrier
->ifindex
)))
2048 r
= hashmap_ensure_allocated(h
, NULL
);
2052 r
= hashmap_put(*h
, INT_TO_PTR(carrier
->ifindex
), carrier
);
2059 static int link_new_bound_by_list(Link
*link
) {
2064 bool list_updated
= false;
2067 assert(link
->manager
);
2071 HASHMAP_FOREACH(carrier
, m
->links
, i
) {
2072 if (!carrier
->network
)
2075 if (strv_isempty(carrier
->network
->bind_carrier
))
2078 if (strv_fnmatch(carrier
->network
->bind_carrier
, link
->ifname
, 0)) {
2079 r
= link_put_carrier(link
, carrier
, &link
->bound_by_links
);
2083 list_updated
= true;
2090 HASHMAP_FOREACH(carrier
, link
->bound_by_links
, i
) {
2091 r
= link_put_carrier(carrier
, link
, &carrier
->bound_to_links
);
2095 link_dirty(carrier
);
2101 static int link_new_bound_to_list(Link
*link
) {
2106 bool list_updated
= false;
2109 assert(link
->manager
);
2114 if (strv_isempty(link
->network
->bind_carrier
))
2119 HASHMAP_FOREACH (carrier
, m
->links
, i
) {
2120 if (strv_fnmatch(link
->network
->bind_carrier
, carrier
->ifname
, 0)) {
2121 r
= link_put_carrier(link
, carrier
, &link
->bound_to_links
);
2125 list_updated
= true;
2132 HASHMAP_FOREACH (carrier
, link
->bound_to_links
, i
) {
2133 r
= link_put_carrier(carrier
, link
, &carrier
->bound_by_links
);
2137 link_dirty(carrier
);
2143 static int link_new_carrier_maps(Link
*link
) {
2146 r
= link_new_bound_by_list(link
);
2150 r
= link_handle_bound_by_list(link
);
2154 r
= link_new_bound_to_list(link
);
2158 r
= link_handle_bound_to_list(link
);
2165 static void link_free_bound_to_list(Link
*link
) {
2169 HASHMAP_FOREACH (bound_to
, link
->bound_to_links
, i
) {
2170 hashmap_remove(link
->bound_to_links
, INT_TO_PTR(bound_to
->ifindex
));
2172 if (hashmap_remove(bound_to
->bound_by_links
, INT_TO_PTR(link
->ifindex
)))
2173 link_dirty(bound_to
);
2179 static void link_free_bound_by_list(Link
*link
) {
2183 HASHMAP_FOREACH (bound_by
, link
->bound_by_links
, i
) {
2184 hashmap_remove(link
->bound_by_links
, INT_TO_PTR(bound_by
->ifindex
));
2186 if (hashmap_remove(bound_by
->bound_to_links
, INT_TO_PTR(link
->ifindex
))) {
2187 link_dirty(bound_by
);
2188 link_handle_bound_to_list(bound_by
);
2195 static void link_free_carrier_maps(Link
*link
) {
2196 bool list_updated
= false;
2200 if (!hashmap_isempty(link
->bound_to_links
)) {
2201 link_free_bound_to_list(link
);
2202 list_updated
= true;
2205 if (!hashmap_isempty(link
->bound_by_links
)) {
2206 link_free_bound_by_list(link
);
2207 list_updated
= true;
2216 void link_drop(Link
*link
) {
2217 if (!link
|| link
->state
== LINK_STATE_LINGER
)
2220 link_set_state(link
, LINK_STATE_LINGER
);
2222 link_free_carrier_maps(link
);
2224 log_link_debug(link
, "Link removed");
2226 (void) unlink(link
->state_file
);
2228 link_detach_from_manager(link
);
2235 static int link_joined(Link
*link
) {
2239 assert(link
->network
);
2241 if (!hashmap_isempty(link
->bound_to_links
)) {
2242 r
= link_handle_bound_to_list(link
);
2245 } else if (!(link
->flags
& IFF_UP
)) {
2248 link_enter_failed(link
);
2253 if (link
->network
->bridge
) {
2254 r
= link_set_bridge(link
);
2256 log_link_error_errno(link
, r
, "Could not set bridge message: %m");
2259 if (link
->network
->bond
) {
2260 r
= link_bond_set(link
);
2262 log_link_error_errno(link
, r
, "Could not set bond message: %m");
2265 if (link
->network
->use_br_vlan
&&
2266 (link
->network
->bridge
|| streq_ptr("bridge", link
->kind
))) {
2267 r
= link_set_bridge_vlan(link
);
2269 log_link_error_errno(link
, r
, "Could not set bridge vlan: %m");
2272 /* Skip setting up addresses until it gets carrier,
2273 or it would try to set addresses twice,
2274 which is bad for non-idempotent steps. */
2275 if (!link_has_carrier(link
) && !link
->network
->configure_without_carrier
)
2278 return link_request_set_addresses(link
);
2281 static int netdev_join_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
2285 assert(link
->network
);
2289 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
2292 r
= sd_netlink_message_get_errno(m
);
2293 if (r
< 0 && r
!= -EEXIST
) {
2294 log_link_error_errno(link
, r
, "Could not join netdev: %m");
2295 link_enter_failed(link
);
2298 log_link_debug(link
, "Joined netdev");
2300 if (link
->enslaving
<= 0)
2306 static int link_enter_join_netdev(Link
*link
) {
2312 assert(link
->network
);
2313 assert(link
->state
== LINK_STATE_PENDING
);
2315 link_set_state(link
, LINK_STATE_CONFIGURING
);
2319 if (!link
->network
->bridge
&&
2320 !link
->network
->bond
&&
2321 !link
->network
->vrf
&&
2322 hashmap_isempty(link
->network
->stacked_netdevs
))
2323 return link_joined(link
);
2325 if (link
->network
->bond
) {
2326 if (link
->network
->bond
->state
== NETDEV_STATE_READY
&&
2327 link
->network
->bond
->ifindex
== link
->master_ifindex
)
2328 return link_joined(link
);
2330 log_struct(LOG_DEBUG
,
2331 LOG_LINK_INTERFACE(link
),
2332 LOG_NETDEV_INTERFACE(link
->network
->bond
),
2333 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", link
->network
->bond
->ifname
));
2335 r
= netdev_join(link
->network
->bond
, link
, netdev_join_handler
);
2337 log_struct_errno(LOG_WARNING
, r
,
2338 LOG_LINK_INTERFACE(link
),
2339 LOG_NETDEV_INTERFACE(link
->network
->bond
),
2340 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", link
->network
->bond
->ifname
));
2341 link_enter_failed(link
);
2348 if (link
->network
->bridge
) {
2349 log_struct(LOG_DEBUG
,
2350 LOG_LINK_INTERFACE(link
),
2351 LOG_NETDEV_INTERFACE(link
->network
->bridge
),
2352 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", link
->network
->bridge
->ifname
));
2354 r
= netdev_join(link
->network
->bridge
, link
, netdev_join_handler
);
2356 log_struct_errno(LOG_WARNING
, r
,
2357 LOG_LINK_INTERFACE(link
),
2358 LOG_NETDEV_INTERFACE(link
->network
->bridge
),
2359 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", link
->network
->bridge
->ifname
));
2360 link_enter_failed(link
);
2367 if (link
->network
->vrf
) {
2368 log_struct(LOG_DEBUG
,
2369 LOG_LINK_INTERFACE(link
),
2370 LOG_NETDEV_INTERFACE(link
->network
->vrf
),
2371 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", link
->network
->vrf
->ifname
));
2373 r
= netdev_join(link
->network
->vrf
, link
, netdev_join_handler
);
2375 log_struct_errno(LOG_WARNING
, r
,
2376 LOG_LINK_INTERFACE(link
),
2377 LOG_NETDEV_INTERFACE(link
->network
->vrf
),
2378 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", link
->network
->vrf
->ifname
));
2379 link_enter_failed(link
);
2386 HASHMAP_FOREACH(netdev
, link
->network
->stacked_netdevs
, i
) {
2388 if (netdev
->ifindex
> 0) {
2393 log_struct(LOG_DEBUG
,
2394 LOG_LINK_INTERFACE(link
),
2395 LOG_NETDEV_INTERFACE(netdev
),
2396 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", netdev
->ifname
));
2398 r
= netdev_join(netdev
, link
, netdev_join_handler
);
2400 log_struct_errno(LOG_WARNING
, r
,
2401 LOG_LINK_INTERFACE(link
),
2402 LOG_NETDEV_INTERFACE(netdev
),
2403 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", netdev
->ifname
));
2404 link_enter_failed(link
);
2414 static int link_set_ipv4_forward(Link
*link
) {
2417 if (!link_ipv4_forward_enabled(link
))
2420 /* We propagate the forwarding flag from one interface to the
2421 * global setting one way. This means: as long as at least one
2422 * interface was configured at any time that had IP forwarding
2423 * enabled the setting will stay on for good. We do this
2424 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2425 * somewhat in sync (see below). */
2427 r
= write_string_file("/proc/sys/net/ipv4/ip_forward", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE
| WRITE_STRING_FILE_DISABLE_BUFFER
);
2429 log_link_warning_errno(link
, r
, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
2434 static int link_set_ipv6_forward(Link
*link
) {
2437 if (!link_ipv6_forward_enabled(link
))
2440 /* On Linux, the IPv6 stack does not know a per-interface
2441 * packet forwarding setting: either packet forwarding is on
2442 * for all, or off for all. We hence don't bother with a
2443 * per-interface setting, but simply propagate the interface
2444 * flag, if it is set, to the global flag, one-way. Note that
2445 * while IPv4 would allow a per-interface flag, we expose the
2446 * same behaviour there and also propagate the setting from
2447 * one to all, to keep things simple (see above). */
2449 r
= write_string_file("/proc/sys/net/ipv6/conf/all/forwarding", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE
| WRITE_STRING_FILE_DISABLE_BUFFER
);
2451 log_link_warning_errno(link
, r
, "Cannot configure IPv6 packet forwarding, ignoring: %m");
2456 static int link_set_ipv6_privacy_extensions(Link
*link
) {
2457 char buf
[DECIMAL_STR_MAX(unsigned) + 1];
2458 IPv6PrivacyExtensions s
;
2459 const char *p
= NULL
;
2462 s
= link_ipv6_privacy_extensions(link
);
2466 p
= strjoina("/proc/sys/net/ipv6/conf/", link
->ifname
, "/use_tempaddr");
2467 xsprintf(buf
, "%u", (unsigned) link
->network
->ipv6_privacy_extensions
);
2469 r
= write_string_file(p
, buf
, WRITE_STRING_FILE_VERIFY_ON_FAILURE
| WRITE_STRING_FILE_DISABLE_BUFFER
);
2471 log_link_warning_errno(link
, r
, "Cannot configure IPv6 privacy extension for interface: %m");
2476 static int link_set_ipv6_accept_ra(Link
*link
) {
2477 const char *p
= NULL
;
2480 /* Make this a NOP if IPv6 is not available */
2481 if (!socket_ipv6_is_supported())
2484 if (link
->flags
& IFF_LOOPBACK
)
2490 p
= strjoina("/proc/sys/net/ipv6/conf/", link
->ifname
, "/accept_ra");
2492 /* We handle router advertisements ourselves, tell the kernel to GTFO */
2493 r
= write_string_file(p
, "0", WRITE_STRING_FILE_VERIFY_ON_FAILURE
| WRITE_STRING_FILE_DISABLE_BUFFER
);
2495 log_link_warning_errno(link
, r
, "Cannot disable kernel IPv6 accept_ra for interface: %m");
2500 static int link_set_ipv6_dad_transmits(Link
*link
) {
2501 char buf
[DECIMAL_STR_MAX(int) + 1];
2502 const char *p
= NULL
;
2505 /* Make this a NOP if IPv6 is not available */
2506 if (!socket_ipv6_is_supported())
2509 if (link
->flags
& IFF_LOOPBACK
)
2515 if (link
->network
->ipv6_dad_transmits
< 0)
2518 p
= strjoina("/proc/sys/net/ipv6/conf/", link
->ifname
, "/dad_transmits");
2519 xsprintf(buf
, "%i", link
->network
->ipv6_dad_transmits
);
2521 r
= write_string_file(p
, buf
, WRITE_STRING_FILE_VERIFY_ON_FAILURE
| WRITE_STRING_FILE_DISABLE_BUFFER
);
2523 log_link_warning_errno(link
, r
, "Cannot set IPv6 dad transmits for interface: %m");
2528 static int link_set_ipv6_hop_limit(Link
*link
) {
2529 char buf
[DECIMAL_STR_MAX(int) + 1];
2530 const char *p
= NULL
;
2533 /* Make this a NOP if IPv6 is not available */
2534 if (!socket_ipv6_is_supported())
2537 if (link
->flags
& IFF_LOOPBACK
)
2543 if (link
->network
->ipv6_hop_limit
< 0)
2546 p
= strjoina("/proc/sys/net/ipv6/conf/", link
->ifname
, "/hop_limit");
2547 xsprintf(buf
, "%i", link
->network
->ipv6_hop_limit
);
2549 r
= write_string_file(p
, buf
, WRITE_STRING_FILE_VERIFY_ON_FAILURE
| WRITE_STRING_FILE_DISABLE_BUFFER
);
2551 log_link_warning_errno(link
, r
, "Cannot set IPv6 hop limit for interface: %m");
2556 static int link_set_ipv6_mtu(Link
*link
) {
2557 char buf
[DECIMAL_STR_MAX(unsigned) + 1];
2558 const char *p
= NULL
;
2561 /* Make this a NOP if IPv6 is not available */
2562 if (!socket_ipv6_is_supported())
2565 if (link
->flags
& IFF_LOOPBACK
)
2568 if (link
->network
->ipv6_mtu
== 0)
2571 p
= strjoina("/proc/sys/net/ipv6/conf/", link
->ifname
, "/mtu");
2573 xsprintf(buf
, "%" PRIu32
, link
->network
->ipv6_mtu
);
2575 r
= write_string_file(p
, buf
, WRITE_STRING_FILE_DISABLE_BUFFER
);
2577 log_link_warning_errno(link
, r
, "Cannot set IPv6 MTU for interface: %m");
2582 static bool link_is_static_address_configured(Link
*link
, Address
*address
) {
2583 Address
*net_address
;
2591 LIST_FOREACH(addresses
, net_address
, link
->network
->static_addresses
)
2592 if (address_equal(net_address
, address
))
2598 static bool link_is_static_route_configured(Link
*link
, Route
*route
) {
2607 LIST_FOREACH(routes
, net_route
, link
->network
->static_routes
)
2608 if (route_equal(net_route
, route
))
2614 static int link_drop_foreign_config(Link
*link
) {
2620 SET_FOREACH(address
, link
->addresses_foreign
, i
) {
2621 /* we consider IPv6LL addresses to be managed by the kernel */
2622 if (address
->family
== AF_INET6
&& in_addr_is_link_local(AF_INET6
, &address
->in_addr
) == 1)
2625 if (link_is_static_address_configured(link
, address
)) {
2626 r
= address_add(link
, address
->family
, &address
->in_addr
, address
->prefixlen
, NULL
);
2628 return log_link_error_errno(link
, r
, "Failed to add address: %m");
2630 r
= address_remove(address
, link
, NULL
);
2636 SET_FOREACH(route
, link
->routes_foreign
, i
) {
2637 /* do not touch routes managed by the kernel */
2638 if (route
->protocol
== RTPROT_KERNEL
)
2641 if (link_is_static_route_configured(link
, route
)) {
2642 r
= route_add(link
, route
->family
, &route
->dst
, route
->dst_prefixlen
, route
->tos
, route
->priority
, route
->table
, NULL
);
2646 r
= route_remove(route
, link
, NULL
);
2655 static int link_drop_config(Link
*link
) {
2656 Address
*address
, *pool_address
;
2661 SET_FOREACH(address
, link
->addresses
, i
) {
2662 /* we consider IPv6LL addresses to be managed by the kernel */
2663 if (address
->family
== AF_INET6
&& in_addr_is_link_local(AF_INET6
, &address
->in_addr
) == 1)
2666 r
= address_remove(address
, link
, NULL
);
2670 /* If this address came from an address pool, clean up the pool */
2671 LIST_FOREACH(addresses
, pool_address
, link
->pool_addresses
) {
2672 if (address_equal(address
, pool_address
)) {
2673 LIST_REMOVE(addresses
, link
->pool_addresses
, pool_address
);
2674 address_free(pool_address
);
2680 SET_FOREACH(route
, link
->routes
, i
) {
2681 /* do not touch routes managed by the kernel */
2682 if (route
->protocol
== RTPROT_KERNEL
)
2685 r
= route_remove(route
, link
, NULL
);
2695 static int link_update_lldp(Link
*link
) {
2703 if (link
->flags
& IFF_UP
) {
2704 r
= sd_lldp_start(link
->lldp
);
2706 log_link_debug(link
, "Started LLDP.");
2708 r
= sd_lldp_stop(link
->lldp
);
2710 log_link_debug(link
, "Stopped LLDP.");
2716 static int link_configure_can(Link
*link
) {
2719 if (streq_ptr(link
->kind
, "can")) {
2720 /* The CAN interface must be down to configure bitrate, etc... */
2721 if ((link
->flags
& IFF_UP
)) {
2722 r
= link_down(link
);
2724 link_enter_failed(link
);
2731 return link_set_can(link
);
2734 if (!(link
->flags
& IFF_UP
)) {
2735 r
= link_up_can(link
);
2737 link_enter_failed(link
);
2745 static int link_configure(Link
*link
) {
2749 assert(link
->network
);
2750 assert(link
->state
== LINK_STATE_PENDING
);
2752 if (STRPTR_IN_SET(link
->kind
, "can", "vcan"))
2753 return link_configure_can(link
);
2755 /* Drop foreign config, but ignore loopback or critical devices.
2756 * We do not want to remove loopback address or addresses used for root NFS. */
2757 if (!(link
->flags
& IFF_LOOPBACK
) && !(link
->network
->dhcp_critical
)) {
2758 r
= link_drop_foreign_config(link
);
2763 r
= link_set_proxy_arp(link
);
2767 r
= ipv6_proxy_ndp_addresses_configure(link
);
2771 r
= link_set_ipv4_forward(link
);
2775 r
= link_set_ipv6_forward(link
);
2779 r
= link_set_ipv6_privacy_extensions(link
);
2783 r
= link_set_ipv6_accept_ra(link
);
2787 r
= link_set_ipv6_dad_transmits(link
);
2791 r
= link_set_ipv6_hop_limit(link
);
2795 r
= link_set_flags(link
);
2799 r
= link_set_ipv6_mtu(link
);
2803 if (link_ipv4ll_enabled(link
)) {
2804 r
= ipv4ll_configure(link
);
2809 if (link_dhcp4_enabled(link
)) {
2810 r
= dhcp4_set_promote_secondaries(link
);
2814 r
= dhcp4_configure(link
);
2819 if (link_dhcp4_server_enabled(link
)) {
2820 r
= sd_dhcp_server_new(&link
->dhcp_server
, link
->ifindex
);
2824 r
= sd_dhcp_server_attach_event(link
->dhcp_server
, NULL
, 0);
2829 if (link_dhcp6_enabled(link
) ||
2830 link_ipv6_accept_ra_enabled(link
)) {
2831 r
= dhcp6_configure(link
);
2836 if (link_ipv6_accept_ra_enabled(link
)) {
2837 r
= ndisc_configure(link
);
2842 if (link_radv_enabled(link
)) {
2843 r
= radv_configure(link
);
2848 if (link_lldp_rx_enabled(link
)) {
2849 r
= sd_lldp_new(&link
->lldp
);
2853 r
= sd_lldp_set_ifindex(link
->lldp
, link
->ifindex
);
2857 r
= sd_lldp_match_capabilities(link
->lldp
,
2858 link
->network
->lldp_mode
== LLDP_MODE_ROUTERS_ONLY
?
2859 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS
:
2860 SD_LLDP_SYSTEM_CAPABILITIES_ALL
);
2864 r
= sd_lldp_set_filter_address(link
->lldp
, &link
->mac
);
2868 r
= sd_lldp_attach_event(link
->lldp
, NULL
, 0);
2872 r
= sd_lldp_set_callback(link
->lldp
, lldp_handler
, link
);
2876 r
= link_update_lldp(link
);
2881 if (link
->network
->mtu
> 0) {
2882 r
= link_set_mtu(link
, link
->network
->mtu
);
2887 return link_configure_after_setting_mtu(link
);
2890 static int link_configure_after_setting_mtu(Link
*link
) {
2894 assert(link
->network
);
2895 assert(link
->state
== LINK_STATE_PENDING
);
2897 if (link
->setting_mtu
)
2900 if (link_has_carrier(link
) || link
->network
->configure_without_carrier
) {
2901 r
= link_acquire_conf(link
);
2906 return link_enter_join_netdev(link
);
2909 static int duid_set_uuid(DUID
*duid
, sd_id128_t uuid
) {
2912 if (duid
->raw_data_len
> 0)
2915 if (duid
->type
!= DUID_TYPE_UUID
)
2918 memcpy(&duid
->raw_data
, &uuid
, sizeof(sd_id128_t
));
2919 duid
->raw_data_len
= sizeof(sd_id128_t
);
2924 int get_product_uuid_handler(sd_bus_message
*m
, void *userdata
, sd_bus_error
*ret_error
) {
2925 Manager
*manager
= userdata
;
2926 const sd_bus_error
*e
;
2936 e
= sd_bus_message_get_error(m
);
2938 log_error_errno(sd_bus_error_get_errno(e
),
2939 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
2944 r
= sd_bus_message_read_array(m
, 'y', &a
, &sz
);
2948 if (sz
!= sizeof(sd_id128_t
)) {
2949 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
2953 memcpy(&manager
->product_uuid
, a
, sz
);
2954 while ((duid
= set_steal_first(manager
->duids_requesting_uuid
)))
2955 (void) duid_set_uuid(duid
, manager
->product_uuid
);
2957 manager
->duids_requesting_uuid
= set_free(manager
->duids_requesting_uuid
);
2960 while ((link
= set_steal_first(manager
->links_requesting_uuid
))) {
2961 r
= link_configure(link
);
2963 log_link_error_errno(link
, r
, "Failed to configure link: %m");
2966 manager
->links_requesting_uuid
= set_free(manager
->links_requesting_uuid
);
2968 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2969 * even if the method fails. */
2970 manager
->has_product_uuid
= true;
2975 static bool link_requires_uuid(Link
*link
) {
2979 assert(link
->manager
);
2980 assert(link
->network
);
2982 duid
= link_get_duid(link
);
2983 if (duid
->type
!= DUID_TYPE_UUID
|| duid
->raw_data_len
!= 0)
2986 if (link_dhcp4_enabled(link
) && IN_SET(link
->network
->dhcp_client_identifier
, DHCP_CLIENT_ID_DUID
, DHCP_CLIENT_ID_DUID_ONLY
))
2989 if (link_dhcp6_enabled(link
) || link_ipv6_accept_ra_enabled(link
))
2995 static int link_configure_duid(Link
*link
) {
3001 assert(link
->manager
);
3002 assert(link
->network
);
3005 duid
= link_get_duid(link
);
3007 if (!link_requires_uuid(link
))
3010 if (m
->has_product_uuid
) {
3011 (void) duid_set_uuid(duid
, m
->product_uuid
);
3015 if (!m
->links_requesting_uuid
) {
3016 r
= manager_request_product_uuid(m
, link
);
3021 log_link_warning_errno(link
, r
,
3022 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
3026 r
= set_put(m
->links_requesting_uuid
, link
);
3030 r
= set_put(m
->duids_requesting_uuid
, duid
);
3038 static int link_initialized_and_synced(Link
*link
) {
3043 assert(link
->ifname
);
3044 assert(link
->manager
);
3046 if (link
->state
!= LINK_STATE_PENDING
)
3049 log_link_debug(link
, "Link state is up-to-date");
3051 r
= link_new_bound_by_list(link
);
3055 r
= link_handle_bound_by_list(link
);
3059 if (!link
->network
) {
3060 r
= network_get(link
->manager
, link
->sd_device
, link
->ifname
,
3061 &link
->mac
, &network
);
3063 link_enter_unmanaged(link
);
3065 } else if (r
== 0 && network
->unmanaged
) {
3066 link_enter_unmanaged(link
);
3071 if (link
->flags
& IFF_LOOPBACK
) {
3072 if (network
->link_local
!= ADDRESS_FAMILY_NO
)
3073 log_link_debug(link
, "Ignoring link-local autoconfiguration for loopback link");
3075 if (network
->dhcp
!= ADDRESS_FAMILY_NO
)
3076 log_link_debug(link
, "Ignoring DHCP clients for loopback link");
3078 if (network
->dhcp_server
)
3079 log_link_debug(link
, "Ignoring DHCP server for loopback link");
3082 r
= network_apply(network
, link
);
3087 r
= link_new_bound_to_list(link
);
3091 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3092 * link_configure() is called later asynchronously. */
3093 r
= link_configure_duid(link
);
3097 r
= link_configure(link
);
3104 static int link_initialized_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
3105 (void) link_initialized_and_synced(link
);
3109 int link_initialized(Link
*link
, sd_device
*device
) {
3110 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
3114 assert(link
->manager
);
3115 assert(link
->manager
->rtnl
);
3118 if (link
->state
!= LINK_STATE_PENDING
)
3121 if (link
->sd_device
)
3124 log_link_debug(link
, "udev initialized link");
3126 link
->sd_device
= sd_device_ref(device
);
3128 /* udev has initialized the link, but we don't know if we have yet
3129 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3130 * when it returns we know that the pending NEWLINKs have already been
3131 * processed and that we are up-to-date */
3133 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_GETLINK
,
3138 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, link_initialized_handler
,
3139 link_netlink_destroy_callback
, link
);
3148 static int link_load(Link
*link
) {
3149 _cleanup_free_
char *network_file
= NULL
,
3152 *dhcp4_address
= NULL
,
3153 *ipv4ll_address
= NULL
;
3154 union in_addr_union address
;
3155 union in_addr_union route_dst
;
3161 r
= parse_env_file(NULL
, link
->state_file
,
3162 "NETWORK_FILE", &network_file
,
3163 "ADDRESSES", &addresses
,
3165 "DHCP4_ADDRESS", &dhcp4_address
,
3166 "IPV4LL_ADDRESS", &ipv4ll_address
);
3167 if (r
< 0 && r
!= -ENOENT
)
3168 return log_link_error_errno(link
, r
, "Failed to read %s: %m", link
->state_file
);
3175 suffix
= strrchr(network_file
, '.');
3177 log_link_debug(link
, "Failed to get network name from %s", network_file
);
3178 goto network_file_fail
;
3182 r
= network_get_by_name(link
->manager
, basename(network_file
), &network
);
3184 log_link_debug_errno(link
, r
, "Failed to get network %s: %m", basename(network_file
));
3185 goto network_file_fail
;
3188 r
= network_apply(network
, link
);
3190 return log_link_error_errno(link
, r
, "Failed to apply network %s: %m", basename(network_file
));
3199 _cleanup_free_
char *address_str
= NULL
;
3200 char *prefixlen_str
;
3202 unsigned char prefixlen
;
3204 r
= extract_first_word(&p
, &address_str
, NULL
, 0);
3206 log_link_debug_errno(link
, r
, "Failed to extract next address string: %m");
3212 prefixlen_str
= strchr(address_str
, '/');
3213 if (!prefixlen_str
) {
3214 log_link_debug(link
, "Failed to parse address and prefix length %s", address_str
);
3218 *prefixlen_str
++ = '\0';
3220 r
= sscanf(prefixlen_str
, "%hhu", &prefixlen
);
3222 log_link_error(link
, "Failed to parse prefixlen %s", prefixlen_str
);
3226 r
= in_addr_from_string_auto(address_str
, &family
, &address
);
3228 log_link_debug_errno(link
, r
, "Failed to parse address %s: %m", address_str
);
3232 r
= address_add(link
, family
, &address
, prefixlen
, NULL
);
3234 return log_link_error_errno(link
, r
, "Failed to add address: %m");
3243 _cleanup_free_
char *route_str
= NULL
;
3244 _cleanup_(sd_event_source_unrefp
) sd_event_source
*expire
= NULL
;
3246 char *prefixlen_str
;
3248 unsigned char prefixlen
, tos
, table
;
3251 r
= extract_first_word(&p
, &route_str
, NULL
, 0);
3253 log_link_debug_errno(link
, r
, "Failed to extract next route string: %m");
3259 prefixlen_str
= strchr(route_str
, '/');
3260 if (!prefixlen_str
) {
3261 log_link_debug(link
, "Failed to parse route %s", route_str
);
3265 *prefixlen_str
++ = '\0';
3267 r
= sscanf(prefixlen_str
, "%hhu/%hhu/%"SCNu32
"/%hhu/"USEC_FMT
, &prefixlen
, &tos
, &priority
, &table
, &lifetime
);
3269 log_link_debug(link
,
3270 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3275 r
= in_addr_from_string_auto(route_str
, &family
, &route_dst
);
3277 log_link_debug_errno(link
, r
, "Failed to parse route destination %s: %m", route_str
);
3281 r
= route_add(link
, family
, &route_dst
, prefixlen
, tos
, priority
, table
, &route
);
3283 return log_link_error_errno(link
, r
, "Failed to add route: %m");
3285 if (lifetime
!= USEC_INFINITY
&& !kernel_route_expiration_supported()) {
3286 r
= sd_event_add_time(link
->manager
->event
, &expire
, clock_boottime_or_monotonic(), lifetime
,
3287 0, route_expire_handler
, route
);
3289 log_link_warning_errno(link
, r
, "Could not arm route expiration handler: %m");
3292 route
->lifetime
= lifetime
;
3293 sd_event_source_unref(route
->expire
);
3294 route
->expire
= TAKE_PTR(expire
);
3298 if (dhcp4_address
) {
3299 r
= in_addr_from_string(AF_INET
, dhcp4_address
, &address
);
3301 log_link_debug_errno(link
, r
, "Failed to parse DHCPv4 address %s: %m", dhcp4_address
);
3302 goto dhcp4_address_fail
;
3305 r
= sd_dhcp_client_new(&link
->dhcp_client
, link
->network
? link
->network
->dhcp_anonymize
: 0);
3307 return log_link_error_errno(link
, r
, "Failed to create DHCPv4 client: %m");
3309 r
= sd_dhcp_client_set_request_address(link
->dhcp_client
, &address
.in
);
3311 return log_link_error_errno(link
, r
, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address
);
3316 if (ipv4ll_address
) {
3317 r
= in_addr_from_string(AF_INET
, ipv4ll_address
, &address
);
3319 log_link_debug_errno(link
, r
, "Failed to parse IPv4LL address %s: %m", ipv4ll_address
);
3320 goto ipv4ll_address_fail
;
3323 r
= sd_ipv4ll_new(&link
->ipv4ll
);
3325 return log_link_error_errno(link
, r
, "Failed to create IPv4LL client: %m");
3327 r
= sd_ipv4ll_set_address(link
->ipv4ll
, &address
.in
);
3329 return log_link_error_errno(link
, r
, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address
);
3332 ipv4ll_address_fail
:
3337 int link_add(Manager
*m
, sd_netlink_message
*message
, Link
**ret
) {
3338 _cleanup_(sd_device_unrefp
) sd_device
*device
= NULL
;
3339 char ifindex_str
[2 + DECIMAL_STR_MAX(int)];
3348 r
= link_new(m
, message
, ret
);
3354 log_link_debug(link
, "Link %d added", link
->ifindex
);
3356 r
= link_load(link
);
3360 if (detect_container() <= 0) {
3361 /* not in a container, udev will be around */
3362 sprintf(ifindex_str
, "n%d", link
->ifindex
);
3363 r
= sd_device_new_from_device_id(&device
, ifindex_str
);
3365 log_link_warning_errno(link
, r
, "Could not find device: %m");
3369 r
= sd_device_get_is_initialized(device
);
3371 log_link_warning_errno(link
, r
, "Could not determine whether the device is initialized or not: %m");
3376 log_link_debug(link
, "link pending udev initialization...");
3380 r
= link_initialized(link
, device
);
3384 r
= link_initialized_and_synced(link
);
3391 link_enter_failed(link
);
3395 int link_ipv6ll_gained(Link
*link
, const struct in6_addr
*address
) {
3400 log_link_info(link
, "Gained IPv6LL");
3402 link
->ipv6ll_address
= *address
;
3403 link_check_ready(link
);
3405 if (!IN_SET(link
->state
, LINK_STATE_PENDING
, LINK_STATE_UNMANAGED
, LINK_STATE_FAILED
)) {
3406 r
= link_acquire_ipv6_conf(link
);
3408 link_enter_failed(link
);
3416 static int link_carrier_gained(Link
*link
) {
3421 if (!IN_SET(link
->state
, LINK_STATE_PENDING
, LINK_STATE_UNMANAGED
, LINK_STATE_FAILED
)) {
3422 r
= link_acquire_conf(link
);
3424 link_enter_failed(link
);
3428 r
= link_request_set_addresses(link
);
3433 r
= link_handle_bound_by_list(link
);
3440 static int link_carrier_lost(Link
*link
) {
3445 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
3446 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3447 * configuration and stop the clients as well. */
3448 if (link
->setting_mtu
)
3451 r
= link_stop_clients(link
);
3453 link_enter_failed(link
);
3457 if (link_dhcp4_server_enabled(link
))
3458 (void) sd_dhcp_server_stop(link
->dhcp_server
);
3460 r
= link_drop_config(link
);
3464 if (!IN_SET(link
->state
, LINK_STATE_UNMANAGED
, LINK_STATE_PENDING
)) {
3465 log_link_debug(link
, "State is %s, dropping config", link_state_to_string(link
->state
));
3466 r
= link_drop_foreign_config(link
);
3471 r
= link_handle_bound_by_list(link
);
3478 int link_carrier_reset(Link
*link
) {
3483 if (link_has_carrier(link
)) {
3484 r
= link_carrier_lost(link
);
3488 r
= link_carrier_gained(link
);
3492 log_link_info(link
, "Reset carrier");
3498 int link_update(Link
*link
, sd_netlink_message
*m
) {
3499 struct ether_addr mac
;
3502 bool had_carrier
, carrier_gained
, carrier_lost
;
3506 assert(link
->ifname
);
3509 if (link
->state
== LINK_STATE_LINGER
) {
3510 log_link_info(link
, "Link readded");
3511 link_set_state(link
, LINK_STATE_CONFIGURING
);
3513 r
= link_new_carrier_maps(link
);
3518 r
= sd_netlink_message_read_string(m
, IFLA_IFNAME
, &ifname
);
3519 if (r
>= 0 && !streq(ifname
, link
->ifname
)) {
3520 log_link_info(link
, "Interface name change detected, %s has been renamed to %s.", link
->ifname
, ifname
);
3522 if (link
->state
== LINK_STATE_PENDING
) {
3523 r
= free_and_strdup(&link
->ifname
, ifname
);
3527 Manager
*manager
= link
->manager
;
3530 r
= link_add(manager
, m
, &link
);
3536 r
= sd_netlink_message_read_u32(m
, IFLA_MTU
, &mtu
);
3537 if (r
>= 0 && mtu
> 0) {
3539 if (link
->original_mtu
== 0) {
3540 link
->original_mtu
= mtu
;
3541 log_link_debug(link
, "Saved original MTU: %" PRIu32
, link
->original_mtu
);
3544 if (link
->dhcp_client
) {
3545 r
= sd_dhcp_client_set_mtu(link
->dhcp_client
,
3548 return log_link_warning_errno(link
, r
, "Could not update MTU in DHCP client: %m");
3552 r
= sd_radv_set_mtu(link
->radv
, link
->mtu
);
3554 return log_link_warning_errno(link
, r
, "Could not set MTU for Router Advertisement: %m");
3558 /* The kernel may broadcast NEWLINK messages without the MAC address
3559 set, simply ignore them. */
3560 r
= sd_netlink_message_read_ether_addr(m
, IFLA_ADDRESS
, &mac
);
3562 if (memcmp(link
->mac
.ether_addr_octet
, mac
.ether_addr_octet
,
3565 memcpy(link
->mac
.ether_addr_octet
, mac
.ether_addr_octet
,
3568 log_link_debug(link
, "MAC address: "
3569 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3570 mac
.ether_addr_octet
[0],
3571 mac
.ether_addr_octet
[1],
3572 mac
.ether_addr_octet
[2],
3573 mac
.ether_addr_octet
[3],
3574 mac
.ether_addr_octet
[4],
3575 mac
.ether_addr_octet
[5]);
3578 r
= sd_ipv4ll_set_mac(link
->ipv4ll
, &link
->mac
);
3580 return log_link_warning_errno(link
, r
, "Could not update MAC address in IPv4LL client: %m");
3583 if (link
->dhcp_client
) {
3584 r
= sd_dhcp_client_set_mac(link
->dhcp_client
,
3585 (const uint8_t *) &link
->mac
,
3589 return log_link_warning_errno(link
, r
, "Could not update MAC address in DHCP client: %m");
3591 r
= dhcp4_set_client_identifier(link
);
3596 if (link
->dhcp6_client
) {
3597 const DUID
* duid
= link_get_duid(link
);
3599 r
= sd_dhcp6_client_set_mac(link
->dhcp6_client
,
3600 (const uint8_t *) &link
->mac
,
3604 return log_link_warning_errno(link
, r
, "Could not update MAC address in DHCPv6 client: %m");
3606 r
= sd_dhcp6_client_set_iaid(link
->dhcp6_client
,
3607 link
->network
->iaid
);
3609 return log_link_warning_errno(link
, r
, "Could not update DHCPv6 IAID: %m");
3611 r
= sd_dhcp6_client_set_duid(link
->dhcp6_client
,
3613 duid
->raw_data_len
> 0 ? duid
->raw_data
: NULL
,
3614 duid
->raw_data_len
);
3616 return log_link_warning_errno(link
, r
, "Could not update DHCPv6 DUID: %m");
3620 r
= sd_radv_set_mac(link
->radv
, &link
->mac
);
3622 return log_link_warning_errno(link
, r
, "Could not update MAC for Router Advertisement: %m");
3626 r
= sd_ndisc_set_mac(link
->ndisc
, &link
->mac
);
3628 return log_link_warning_errno(link
, r
, "Could not update MAC for ndisc: %m");
3633 had_carrier
= link_has_carrier(link
);
3635 r
= link_update_flags(link
, m
);
3639 r
= link_update_lldp(link
);
3643 carrier_gained
= !had_carrier
&& link_has_carrier(link
);
3644 carrier_lost
= had_carrier
&& !link_has_carrier(link
);
3646 if (carrier_gained
) {
3647 log_link_info(link
, "Gained carrier");
3649 r
= link_carrier_gained(link
);
3652 } else if (carrier_lost
) {
3653 log_link_info(link
, "Lost carrier");
3655 r
= link_carrier_lost(link
);
3663 static void print_link_hashmap(FILE *f
, const char *prefix
, Hashmap
* h
) {
3671 if (hashmap_isempty(h
))
3675 HASHMAP_FOREACH(link
, h
, i
) {
3679 fprintf(f
, "%i", link
->ifindex
);
3686 int link_save(Link
*link
) {
3687 _cleanup_free_
char *temp_path
= NULL
;
3688 _cleanup_fclose_
FILE *f
= NULL
;
3689 const char *admin_state
, *oper_state
;
3696 assert(link
->state_file
);
3697 assert(link
->lease_file
);
3698 assert(link
->manager
);
3700 if (link
->state
== LINK_STATE_LINGER
) {
3701 unlink(link
->state_file
);
3705 link_lldp_save(link
);
3707 admin_state
= link_state_to_string(link
->state
);
3708 assert(admin_state
);
3710 oper_state
= link_operstate_to_string(link
->operstate
);
3713 r
= fopen_temporary(link
->state_file
, &f
, &temp_path
);
3717 (void) __fsetlocking(f
, FSETLOCKING_BYCALLER
);
3718 (void) fchmod(fileno(f
), 0644);
3721 "# This is private data. Do not parse.\n"
3724 admin_state
, oper_state
);
3726 if (link
->network
) {
3728 sd_dhcp6_lease
*dhcp6_lease
= NULL
;
3729 const char *dhcp_domainname
= NULL
;
3730 char **dhcp6_domains
= NULL
;
3731 char **dhcp_domains
= NULL
;
3734 fprintf(f
, "REQUIRED_FOR_ONLINE=%s\n",
3735 yes_no(link
->network
->required_for_online
));
3737 if (link
->dhcp6_client
) {
3738 r
= sd_dhcp6_client_get_lease(link
->dhcp6_client
, &dhcp6_lease
);
3739 if (r
< 0 && r
!= -ENOMSG
)
3740 log_link_debug(link
, "No DHCPv6 lease");
3743 fprintf(f
, "NETWORK_FILE=%s\n", link
->network
->filename
);
3748 for (j
= 0; j
< link
->network
->n_dns
; j
++) {
3749 _cleanup_free_
char *b
= NULL
;
3751 r
= in_addr_to_string(link
->network
->dns
[j
].family
,
3752 &link
->network
->dns
[j
].address
, &b
);
3754 log_debug_errno(r
, "Failed to format address, ignoring: %m");
3764 if (link
->network
->dhcp_use_dns
&&
3766 const struct in_addr
*addresses
;
3768 r
= sd_dhcp_lease_get_dns(link
->dhcp_lease
, &addresses
);
3772 serialize_in_addrs(f
, addresses
, r
);
3777 if (link
->network
->dhcp_use_dns
&& dhcp6_lease
) {
3778 struct in6_addr
*in6_addrs
;
3780 r
= sd_dhcp6_lease_get_dns(dhcp6_lease
, &in6_addrs
);
3784 serialize_in6_addrs(f
, in6_addrs
, r
);
3789 /* Make sure to flush out old entries before we use the NDISC data */
3792 if (link
->network
->ipv6_accept_ra_use_dns
&& link
->ndisc_rdnss
) {
3795 SET_FOREACH(dd
, link
->ndisc_rdnss
, i
) {
3799 serialize_in6_addrs(f
, &dd
->address
, 1);
3808 fputstrv(f
, link
->network
->ntp
, NULL
, &space
);
3810 if (link
->network
->dhcp_use_ntp
&&
3812 const struct in_addr
*addresses
;
3814 r
= sd_dhcp_lease_get_ntp(link
->dhcp_lease
, &addresses
);
3818 serialize_in_addrs(f
, addresses
, r
);
3823 if (link
->network
->dhcp_use_ntp
&& dhcp6_lease
) {
3824 struct in6_addr
*in6_addrs
;
3827 r
= sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease
,
3832 serialize_in6_addrs(f
, in6_addrs
, r
);
3836 r
= sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease
, &hosts
);
3838 fputstrv(f
, hosts
, NULL
, &space
);
3843 if (link
->network
->dhcp_use_domains
!= DHCP_USE_DOMAINS_NO
) {
3844 if (link
->dhcp_lease
) {
3845 (void) sd_dhcp_lease_get_domainname(link
->dhcp_lease
, &dhcp_domainname
);
3846 (void) sd_dhcp_lease_get_search_domains(link
->dhcp_lease
, &dhcp_domains
);
3849 (void) sd_dhcp6_lease_get_domains(dhcp6_lease
, &dhcp6_domains
);
3852 fputs("DOMAINS=", f
);
3854 fputstrv(f
, link
->network
->search_domains
, NULL
, &space
);
3856 if (link
->network
->dhcp_use_domains
== DHCP_USE_DOMAINS_YES
) {
3859 if (dhcp_domainname
)
3860 fputs_with_space(f
, dhcp_domainname
, NULL
, &space
);
3862 fputstrv(f
, dhcp_domains
, NULL
, &space
);
3864 fputstrv(f
, dhcp6_domains
, NULL
, &space
);
3866 SET_FOREACH(dd
, link
->ndisc_dnssl
, i
)
3867 fputs_with_space(f
, NDISC_DNSSL_DOMAIN(dd
), NULL
, &space
);
3872 fputs("ROUTE_DOMAINS=", f
);
3874 fputstrv(f
, link
->network
->route_domains
, NULL
, &space
);
3876 if (link
->network
->dhcp_use_domains
== DHCP_USE_DOMAINS_ROUTE
) {
3879 if (dhcp_domainname
)
3880 fputs_with_space(f
, dhcp_domainname
, NULL
, &space
);
3882 fputstrv(f
, dhcp_domains
, NULL
, &space
);
3884 fputstrv(f
, dhcp6_domains
, NULL
, &space
);
3886 SET_FOREACH(dd
, link
->ndisc_dnssl
, i
)
3887 fputs_with_space(f
, NDISC_DNSSL_DOMAIN(dd
), NULL
, &space
);
3892 fprintf(f
, "LLMNR=%s\n",
3893 resolve_support_to_string(link
->network
->llmnr
));
3894 fprintf(f
, "MDNS=%s\n",
3895 resolve_support_to_string(link
->network
->mdns
));
3897 if (link
->network
->dns_over_tls_mode
!= _DNS_OVER_TLS_MODE_INVALID
)
3898 fprintf(f
, "DNS_OVER_TLS=%s\n",
3899 dns_over_tls_mode_to_string(link
->network
->dns_over_tls_mode
));
3901 if (link
->network
->dnssec_mode
!= _DNSSEC_MODE_INVALID
)
3902 fprintf(f
, "DNSSEC=%s\n",
3903 dnssec_mode_to_string(link
->network
->dnssec_mode
));
3905 if (!set_isempty(link
->network
->dnssec_negative_trust_anchors
)) {
3908 fputs("DNSSEC_NTA=", f
);
3910 SET_FOREACH(n
, link
->network
->dnssec_negative_trust_anchors
, i
)
3911 fputs_with_space(f
, n
, NULL
, &space
);
3915 fputs("ADDRESSES=", f
);
3917 SET_FOREACH(a
, link
->addresses
, i
) {
3918 _cleanup_free_
char *address_str
= NULL
;
3920 r
= in_addr_to_string(a
->family
, &a
->in_addr
, &address_str
);
3924 fprintf(f
, "%s%s/%u", space
? " " : "", address_str
, a
->prefixlen
);
3929 fputs("ROUTES=", f
);
3931 SET_FOREACH(route
, link
->routes
, i
) {
3932 _cleanup_free_
char *route_str
= NULL
;
3934 r
= in_addr_to_string(route
->family
, &route
->dst
, &route_str
);
3938 fprintf(f
, "%s%s/%hhu/%hhu/%"PRIu32
"/%"PRIu32
"/"USEC_FMT
,
3939 space
? " " : "", route_str
,
3940 route
->dst_prefixlen
, route
->tos
, route
->priority
, route
->table
, route
->lifetime
);
3947 print_link_hashmap(f
, "CARRIER_BOUND_TO=", link
->bound_to_links
);
3948 print_link_hashmap(f
, "CARRIER_BOUND_BY=", link
->bound_by_links
);
3950 if (link
->dhcp_lease
) {
3951 struct in_addr address
;
3952 const char *tz
= NULL
;
3954 assert(link
->network
);
3956 r
= sd_dhcp_lease_get_timezone(link
->dhcp_lease
, &tz
);
3958 fprintf(f
, "TIMEZONE=%s\n", tz
);
3960 r
= sd_dhcp_lease_get_address(link
->dhcp_lease
, &address
);
3962 fputs("DHCP4_ADDRESS=", f
);
3963 serialize_in_addrs(f
, &address
, 1);
3967 r
= dhcp_lease_save(link
->dhcp_lease
, link
->lease_file
);
3975 unlink(link
->lease_file
);
3978 struct in_addr address
;
3980 r
= sd_ipv4ll_get_address(link
->ipv4ll
, &address
);
3982 fputs("IPV4LL_ADDRESS=", f
);
3983 serialize_in_addrs(f
, &address
, 1);
3988 r
= fflush_and_check(f
);
3992 if (rename(temp_path
, link
->state_file
) < 0) {
4000 (void) unlink(link
->state_file
);
4002 (void) unlink(temp_path
);
4004 return log_link_error_errno(link
, r
, "Failed to save link data to %s: %m", link
->state_file
);
4007 /* The serialized state in /run is no longer up-to-date. */
4008 void link_dirty(Link
*link
) {
4013 /* mark manager dirty as link is dirty */
4014 manager_dirty(link
->manager
);
4016 r
= set_ensure_allocated(&link
->manager
->dirty_links
, NULL
);
4018 /* allocation errors are ignored */
4021 r
= set_put(link
->manager
->dirty_links
, link
);
4023 /* don't take another ref if the link was already dirty */
4029 /* The serialized state in /run is up-to-date */
4030 void link_clean(Link
*link
) {
4032 assert(link
->manager
);
4034 link_unref(set_remove(link
->manager
->dirty_links
, link
));
4037 static const char* const link_state_table
[_LINK_STATE_MAX
] = {
4038 [LINK_STATE_PENDING
] = "pending",
4039 [LINK_STATE_CONFIGURING
] = "configuring",
4040 [LINK_STATE_CONFIGURED
] = "configured",
4041 [LINK_STATE_UNMANAGED
] = "unmanaged",
4042 [LINK_STATE_FAILED
] = "failed",
4043 [LINK_STATE_LINGER
] = "linger",
4046 DEFINE_STRING_TABLE_LOOKUP(link_state
, LinkState
);
4048 static const char* const link_operstate_table
[_LINK_OPERSTATE_MAX
] = {
4049 [LINK_OPERSTATE_OFF
] = "off",
4050 [LINK_OPERSTATE_NO_CARRIER
] = "no-carrier",
4051 [LINK_OPERSTATE_DORMANT
] = "dormant",
4052 [LINK_OPERSTATE_CARRIER
] = "carrier",
4053 [LINK_OPERSTATE_DEGRADED
] = "degraded",
4054 [LINK_OPERSTATE_ROUTABLE
] = "routable",
4057 DEFINE_STRING_TABLE_LOOKUP(link_operstate
, LinkOperationalState
);