2 This file is part of systemd.
4 Copyright 2013 Tom Gundersen <teg@jklm.no>
6 systemd is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
11 systemd is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License
17 along with systemd; If not, see <http://www.gnu.org/licenses/>.
20 #include <netinet/ether.h>
24 #include "alloc-util.h"
26 #include "dhcp-lease-internal.h"
29 #include "netlink-util.h"
30 #include "network-internal.h"
31 #include "networkd-lldp-tx.h"
32 #include "networkd-ndisc.h"
35 #include "socket-util.h"
36 #include "stdio-util.h"
37 #include "string-table.h"
38 #include "udev-util.h"
42 static bool link_dhcp6_enabled(Link
*link
) {
45 if (!socket_ipv6_is_supported())
48 if (link
->flags
& IFF_LOOPBACK
)
54 return link
->network
->dhcp
& ADDRESS_FAMILY_IPV6
;
57 static bool link_dhcp4_enabled(Link
*link
) {
60 if (link
->flags
& IFF_LOOPBACK
)
66 return link
->network
->dhcp
& ADDRESS_FAMILY_IPV4
;
69 static bool link_dhcp4_server_enabled(Link
*link
) {
72 if (link
->flags
& IFF_LOOPBACK
)
78 return link
->network
->dhcp_server
;
81 static bool link_ipv4ll_enabled(Link
*link
) {
84 if (link
->flags
& IFF_LOOPBACK
)
90 return link
->network
->link_local
& ADDRESS_FAMILY_IPV4
;
93 static bool link_ipv6ll_enabled(Link
*link
) {
96 if (!socket_ipv6_is_supported())
99 if (link
->flags
& IFF_LOOPBACK
)
105 return link
->network
->link_local
& ADDRESS_FAMILY_IPV6
;
108 static bool link_ipv6_enabled(Link
*link
) {
111 if (!socket_ipv6_is_supported())
114 if (link
->network
->bridge
)
117 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
118 return link_ipv6ll_enabled(link
) || network_has_static_ipv6_addresses(link
->network
);
121 static bool link_lldp_rx_enabled(Link
*link
) {
124 if (link
->flags
& IFF_LOOPBACK
)
127 if (link
->iftype
!= ARPHRD_ETHER
)
133 if (link
->network
->bridge
)
136 return link
->network
->lldp_mode
!= LLDP_MODE_NO
;
139 static bool link_lldp_emit_enabled(Link
*link
) {
142 if (link
->flags
& IFF_LOOPBACK
)
145 if (link
->iftype
!= ARPHRD_ETHER
)
151 return link
->network
->lldp_emit
!= LLDP_EMIT_NO
;
154 static bool link_ipv4_forward_enabled(Link
*link
) {
157 if (link
->flags
& IFF_LOOPBACK
)
163 if (link
->network
->ip_forward
== _ADDRESS_FAMILY_BOOLEAN_INVALID
)
166 return link
->network
->ip_forward
& ADDRESS_FAMILY_IPV4
;
169 static bool link_ipv6_forward_enabled(Link
*link
) {
172 if (!socket_ipv6_is_supported())
175 if (link
->flags
& IFF_LOOPBACK
)
181 if (link
->network
->ip_forward
== _ADDRESS_FAMILY_BOOLEAN_INVALID
)
184 return link
->network
->ip_forward
& ADDRESS_FAMILY_IPV6
;
187 static bool link_proxy_arp_enabled(Link
*link
) {
190 if (link
->flags
& IFF_LOOPBACK
)
196 if (link
->network
->proxy_arp
< 0)
202 static bool link_ipv6_accept_ra_enabled(Link
*link
) {
205 if (!socket_ipv6_is_supported())
208 if (link
->flags
& IFF_LOOPBACK
)
214 /* If unset use system default (enabled if local forwarding is disabled.
215 * disabled if local forwarding is enabled).
216 * If set, ignore or enforce RA independent of local forwarding state.
218 if (link
->network
->ipv6_accept_ra
< 0)
219 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
220 return !link_ipv6_forward_enabled(link
);
221 else if (link
->network
->ipv6_accept_ra
> 0)
222 /* accept RA even if ip_forward is enabled */
229 static IPv6PrivacyExtensions
link_ipv6_privacy_extensions(Link
*link
) {
232 if (!socket_ipv6_is_supported())
233 return _IPV6_PRIVACY_EXTENSIONS_INVALID
;
235 if (link
->flags
& IFF_LOOPBACK
)
236 return _IPV6_PRIVACY_EXTENSIONS_INVALID
;
239 return _IPV6_PRIVACY_EXTENSIONS_INVALID
;
241 return link
->network
->ipv6_privacy_extensions
;
244 static int link_enable_ipv6(Link
*link
) {
245 const char *p
= NULL
;
249 if (link
->flags
& IFF_LOOPBACK
)
252 disabled
= !link_ipv6_enabled(link
);
254 p
= strjoina("/proc/sys/net/ipv6/conf/", link
->ifname
, "/disable_ipv6");
256 r
= write_string_file(p
, one_zero(disabled
), WRITE_STRING_FILE_VERIFY_ON_FAILURE
);
258 log_link_warning_errno(link
, r
, "Cannot %s IPv6 for interface %s: %m", disabled
? "disable" : "enable", link
->ifname
);
261 log_link_info(link
, "IPv6 disabled for interface: %m");
263 log_link_info(link
, "IPv6 enabled for interface: %m");
269 void link_update_operstate(Link
*link
) {
270 LinkOperationalState operstate
;
273 if (link
->kernel_operstate
== IF_OPER_DORMANT
)
274 operstate
= LINK_OPERSTATE_DORMANT
;
275 else if (link_has_carrier(link
)) {
277 uint8_t scope
= RT_SCOPE_NOWHERE
;
280 /* if we have carrier, check what addresses we have */
281 SET_FOREACH(address
, link
->addresses
, i
) {
282 if (!address_is_ready(address
))
285 if (address
->scope
< scope
)
286 scope
= address
->scope
;
289 /* for operstate we also take foreign addresses into account */
290 SET_FOREACH(address
, link
->addresses_foreign
, i
) {
291 if (!address_is_ready(address
))
294 if (address
->scope
< scope
)
295 scope
= address
->scope
;
298 if (scope
< RT_SCOPE_SITE
)
299 /* universally accessible addresses found */
300 operstate
= LINK_OPERSTATE_ROUTABLE
;
301 else if (scope
< RT_SCOPE_HOST
)
302 /* only link or site local addresses found */
303 operstate
= LINK_OPERSTATE_DEGRADED
;
305 /* no useful addresses found */
306 operstate
= LINK_OPERSTATE_CARRIER
;
307 } else if (link
->flags
& IFF_UP
)
308 operstate
= LINK_OPERSTATE_NO_CARRIER
;
310 operstate
= LINK_OPERSTATE_OFF
;
312 if (link
->operstate
!= operstate
) {
313 link
->operstate
= operstate
;
314 link_send_changed(link
, "OperationalState", NULL
);
319 #define FLAG_STRING(string, flag, old, new) \
320 (((old ^ new) & flag) \
321 ? ((old & flag) ? (" -" string) : (" +" string)) \
324 static int link_update_flags(Link
*link
, sd_netlink_message
*m
) {
325 unsigned flags
, unknown_flags_added
, unknown_flags_removed
, unknown_flags
;
331 r
= sd_rtnl_message_link_get_flags(m
, &flags
);
333 return log_link_warning_errno(link
, r
, "Could not get link flags: %m");
335 r
= sd_netlink_message_read_u8(m
, IFLA_OPERSTATE
, &operstate
);
337 /* if we got a message without operstate, take it to mean
338 the state was unchanged */
339 operstate
= link
->kernel_operstate
;
341 if ((link
->flags
== flags
) && (link
->kernel_operstate
== operstate
))
344 if (link
->flags
!= flags
) {
345 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",
346 FLAG_STRING("LOOPBACK", IFF_LOOPBACK
, link
->flags
, flags
),
347 FLAG_STRING("MASTER", IFF_MASTER
, link
->flags
, flags
),
348 FLAG_STRING("SLAVE", IFF_SLAVE
, link
->flags
, flags
),
349 FLAG_STRING("UP", IFF_UP
, link
->flags
, flags
),
350 FLAG_STRING("DORMANT", IFF_DORMANT
, link
->flags
, flags
),
351 FLAG_STRING("LOWER_UP", IFF_LOWER_UP
, link
->flags
, flags
),
352 FLAG_STRING("RUNNING", IFF_RUNNING
, link
->flags
, flags
),
353 FLAG_STRING("MULTICAST", IFF_MULTICAST
, link
->flags
, flags
),
354 FLAG_STRING("BROADCAST", IFF_BROADCAST
, link
->flags
, flags
),
355 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT
, link
->flags
, flags
),
356 FLAG_STRING("PROMISC", IFF_PROMISC
, link
->flags
, flags
),
357 FLAG_STRING("ALLMULTI", IFF_ALLMULTI
, link
->flags
, flags
),
358 FLAG_STRING("PORTSEL", IFF_PORTSEL
, link
->flags
, flags
),
359 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA
, link
->flags
, flags
),
360 FLAG_STRING("DYNAMIC", IFF_DYNAMIC
, link
->flags
, flags
),
361 FLAG_STRING("NOARP", IFF_NOARP
, link
->flags
, flags
),
362 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS
, link
->flags
, flags
),
363 FLAG_STRING("DEBUG", IFF_DEBUG
, link
->flags
, flags
),
364 FLAG_STRING("ECHO", IFF_ECHO
, link
->flags
, flags
));
366 unknown_flags
= ~(IFF_LOOPBACK
| IFF_MASTER
| IFF_SLAVE
| IFF_UP
|
367 IFF_DORMANT
| IFF_LOWER_UP
| IFF_RUNNING
|
368 IFF_MULTICAST
| IFF_BROADCAST
| IFF_POINTOPOINT
|
369 IFF_PROMISC
| IFF_ALLMULTI
| IFF_PORTSEL
|
370 IFF_AUTOMEDIA
| IFF_DYNAMIC
| IFF_NOARP
|
371 IFF_NOTRAILERS
| IFF_DEBUG
| IFF_ECHO
);
372 unknown_flags_added
= ((link
->flags
^ flags
) & flags
& unknown_flags
);
373 unknown_flags_removed
= ((link
->flags
^ flags
) & link
->flags
& unknown_flags
);
375 /* link flags are currently at most 18 bits, let's align to
377 if (unknown_flags_added
)
379 "Unknown link flags gained: %#.5x (ignoring)",
380 unknown_flags_added
);
382 if (unknown_flags_removed
)
384 "Unknown link flags lost: %#.5x (ignoring)",
385 unknown_flags_removed
);
389 link
->kernel_operstate
= operstate
;
391 link_update_operstate(link
);
396 static int link_new(Manager
*manager
, sd_netlink_message
*message
, Link
**ret
) {
397 _cleanup_link_unref_ Link
*link
= NULL
;
399 const char *ifname
, *kind
= NULL
;
401 unsigned short iftype
;
407 /* check for link kind */
408 r
= sd_netlink_message_enter_container(message
, IFLA_LINKINFO
);
410 (void)sd_netlink_message_read_string(message
, IFLA_INFO_KIND
, &kind
);
411 r
= sd_netlink_message_exit_container(message
);
416 r
= sd_netlink_message_get_type(message
, &type
);
419 else if (type
!= RTM_NEWLINK
)
422 r
= sd_rtnl_message_link_get_ifindex(message
, &ifindex
);
425 else if (ifindex
<= 0)
428 r
= sd_rtnl_message_link_get_type(message
, &iftype
);
432 r
= sd_netlink_message_read_string(message
, IFLA_IFNAME
, &ifname
);
436 link
= new0(Link
, 1);
441 link
->manager
= manager
;
442 link
->state
= LINK_STATE_PENDING
;
443 link
->rtnl_extended_attrs
= true;
444 link
->ifindex
= ifindex
;
445 link
->iftype
= iftype
;
446 link
->ifname
= strdup(ifname
);
451 link
->kind
= strdup(kind
);
456 r
= sd_netlink_message_read_ether_addr(message
, IFLA_ADDRESS
, &link
->mac
);
458 log_link_debug_errno(link
, r
, "MAC address not found for new device, continuing without");
460 if (asprintf(&link
->state_file
, "/run/systemd/netif/links/%d", link
->ifindex
) < 0)
463 if (asprintf(&link
->lease_file
, "/run/systemd/netif/leases/%d", link
->ifindex
) < 0)
466 if (asprintf(&link
->lldp_file
, "/run/systemd/netif/lldp/%d", link
->ifindex
) < 0)
469 r
= hashmap_ensure_allocated(&manager
->links
, NULL
);
473 r
= hashmap_put(manager
->links
, INT_TO_PTR(link
->ifindex
), link
);
477 r
= link_update_flags(link
, message
);
487 static void link_free(Link
*link
) {
495 while (!set_isempty(link
->addresses
))
496 address_free(set_first(link
->addresses
));
498 while (!set_isempty(link
->addresses_foreign
))
499 address_free(set_first(link
->addresses_foreign
));
501 link
->addresses
= set_free(link
->addresses
);
503 link
->addresses_foreign
= set_free(link
->addresses_foreign
);
505 while ((address
= link
->pool_addresses
)) {
506 LIST_REMOVE(addresses
, link
->pool_addresses
, address
);
507 address_free(address
);
510 sd_dhcp_server_unref(link
->dhcp_server
);
511 sd_dhcp_client_unref(link
->dhcp_client
);
512 sd_dhcp_lease_unref(link
->dhcp_lease
);
514 link_lldp_emit_stop(link
);
516 free(link
->lease_file
);
518 sd_lldp_unref(link
->lldp
);
519 free(link
->lldp_file
);
521 sd_ipv4ll_unref(link
->ipv4ll
);
522 sd_dhcp6_client_unref(link
->dhcp6_client
);
523 sd_ndisc_unref(link
->ndisc
);
525 set_free_free(link
->ndisc_rdnss
);
526 set_free_free(link
->ndisc_dnssl
);
529 hashmap_remove(link
->manager
->links
, INT_TO_PTR(link
->ifindex
));
535 (void)unlink(link
->state_file
);
536 free(link
->state_file
);
538 udev_device_unref(link
->udev_device
);
540 HASHMAP_FOREACH (carrier
, link
->bound_to_links
, i
)
541 hashmap_remove(link
->bound_to_links
, INT_TO_PTR(carrier
->ifindex
));
542 hashmap_free(link
->bound_to_links
);
544 HASHMAP_FOREACH (carrier
, link
->bound_by_links
, i
)
545 hashmap_remove(link
->bound_by_links
, INT_TO_PTR(carrier
->ifindex
));
546 hashmap_free(link
->bound_by_links
);
551 Link
*link_unref(Link
*link
) {
555 assert(link
->n_ref
> 0);
567 Link
*link_ref(Link
*link
) {
571 assert(link
->n_ref
> 0);
578 int link_get(Manager
*m
, int ifindex
, Link
**ret
) {
585 link
= hashmap_get(m
->links
, INT_TO_PTR(ifindex
));
594 static void link_set_state(Link
*link
, LinkState state
) {
597 if (link
->state
== state
)
602 link_send_changed(link
, "AdministrativeState", NULL
);
605 static void link_enter_unmanaged(Link
*link
) {
608 log_link_debug(link
, "Unmanaged");
610 link_set_state(link
, LINK_STATE_UNMANAGED
);
615 static int link_stop_clients(Link
*link
) {
619 assert(link
->manager
);
620 assert(link
->manager
->event
);
622 if (link
->dhcp_client
) {
623 k
= sd_dhcp_client_stop(link
->dhcp_client
);
625 r
= log_link_warning_errno(link
, k
, "Could not stop DHCPv4 client: %m");
629 k
= sd_ipv4ll_stop(link
->ipv4ll
);
631 r
= log_link_warning_errno(link
, k
, "Could not stop IPv4 link-local: %m");
634 if (link
->dhcp6_client
) {
635 k
= sd_dhcp6_client_stop(link
->dhcp6_client
);
637 r
= log_link_warning_errno(link
, k
, "Could not stop DHCPv6 client: %m");
641 k
= sd_ndisc_stop(link
->ndisc
);
643 r
= log_link_warning_errno(link
, k
, "Could not stop IPv6 Router Discovery: %m");
646 link_lldp_emit_stop(link
);
650 void link_enter_failed(Link
*link
) {
653 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
656 log_link_warning(link
, "Failed");
658 link_set_state(link
, LINK_STATE_FAILED
);
660 link_stop_clients(link
);
665 static Address
* link_find_dhcp_server_address(Link
*link
) {
669 assert(link
->network
);
671 /* The first statically configured address if there is any */
672 LIST_FOREACH(addresses
, address
, link
->network
->static_addresses
) {
674 if (address
->family
!= AF_INET
)
677 if (in_addr_is_null(address
->family
, &address
->in_addr
))
683 /* If that didn't work, find a suitable address we got from the pool */
684 LIST_FOREACH(addresses
, address
, link
->pool_addresses
) {
685 if (address
->family
!= AF_INET
)
694 static int link_enter_configured(Link
*link
) {
696 assert(link
->network
);
697 assert(link
->state
== LINK_STATE_SETTING_ROUTES
);
699 log_link_info(link
, "Configured");
701 link_set_state(link
, LINK_STATE_CONFIGURED
);
708 void link_check_ready(Link
*link
) {
714 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
720 if (!link
->static_configured
)
723 if (link_ipv4ll_enabled(link
))
724 if (!link
->ipv4ll_address
||
728 if (link_ipv6ll_enabled(link
))
729 if (in_addr_is_null(AF_INET6
, (const union in_addr_union
*) &link
->ipv6ll_address
) > 0)
732 if ((link_dhcp4_enabled(link
) && !link_dhcp6_enabled(link
) &&
733 !link
->dhcp4_configured
) ||
734 (link_dhcp6_enabled(link
) && !link_dhcp4_enabled(link
) &&
735 !link
->dhcp6_configured
) ||
736 (link_dhcp4_enabled(link
) && link_dhcp6_enabled(link
) &&
737 !link
->dhcp4_configured
&& !link
->dhcp6_configured
))
740 if (link_ipv6_accept_ra_enabled(link
) && !link
->ndisc_configured
)
743 SET_FOREACH(a
, link
->addresses
, i
)
744 if (!address_is_ready(a
))
747 if (link
->state
!= LINK_STATE_CONFIGURED
)
748 link_enter_configured(link
);
753 static int route_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
754 _cleanup_link_unref_ Link
*link
= userdata
;
757 assert(link
->link_messages
> 0);
758 assert(IN_SET(link
->state
, LINK_STATE_SETTING_ADDRESSES
,
759 LINK_STATE_SETTING_ROUTES
, LINK_STATE_FAILED
,
762 link
->link_messages
--;
764 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
767 r
= sd_netlink_message_get_errno(m
);
768 if (r
< 0 && r
!= -EEXIST
)
769 log_link_warning_errno(link
, r
, "Could not set route: %m");
771 if (link
->link_messages
== 0) {
772 log_link_debug(link
, "Routes set");
773 link
->static_configured
= true;
774 link_check_ready(link
);
780 static int link_enter_set_routes(Link
*link
) {
785 assert(link
->network
);
786 assert(link
->state
== LINK_STATE_SETTING_ADDRESSES
);
788 link_set_state(link
, LINK_STATE_SETTING_ROUTES
);
790 LIST_FOREACH(routes
, rt
, link
->network
->static_routes
) {
791 r
= route_configure(rt
, link
, route_handler
);
793 log_link_warning_errno(link
, r
, "Could not set routes: %m");
794 link_enter_failed(link
);
798 link
->link_messages
++;
801 if (link
->link_messages
== 0) {
802 link
->static_configured
= true;
803 link_check_ready(link
);
805 log_link_debug(link
, "Setting routes");
810 int link_route_remove_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
811 _cleanup_link_unref_ Link
*link
= userdata
;
816 assert(link
->ifname
);
818 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
821 r
= sd_netlink_message_get_errno(m
);
822 if (r
< 0 && r
!= -ESRCH
)
823 log_link_warning_errno(link
, r
, "Could not drop route: %m");
828 static int address_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
829 _cleanup_link_unref_ Link
*link
= userdata
;
835 assert(link
->ifname
);
836 assert(link
->link_messages
> 0);
837 assert(IN_SET(link
->state
, LINK_STATE_SETTING_ADDRESSES
,
838 LINK_STATE_FAILED
, LINK_STATE_LINGER
));
840 link
->link_messages
--;
842 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
845 r
= sd_netlink_message_get_errno(m
);
846 if (r
< 0 && r
!= -EEXIST
)
847 log_link_warning_errno(link
, r
, "could not set address: %m");
849 manager_rtnl_process_address(rtnl
, m
, link
->manager
);
851 if (link
->link_messages
== 0) {
852 log_link_debug(link
, "Addresses set");
853 link_enter_set_routes(link
);
859 static int link_push_dns_to_dhcp_server(Link
*link
, sd_dhcp_server
*s
) {
860 _cleanup_free_
struct in_addr
*addresses
= NULL
;
861 size_t n_addresses
= 0, n_allocated
= 0;
864 log_debug("Copying DNS server information from %s", link
->ifname
);
869 STRV_FOREACH(a
, link
->network
->dns
) {
872 /* Only look for IPv4 addresses */
873 if (inet_pton(AF_INET
, *a
, &ia
) <= 0)
876 if (!GREEDY_REALLOC(addresses
, n_allocated
, n_addresses
+ 1))
879 addresses
[n_addresses
++] = ia
;
882 if (link
->network
->dhcp_use_dns
&&
884 const struct in_addr
*da
= NULL
;
887 n
= sd_dhcp_lease_get_dns(link
->dhcp_lease
, &da
);
890 if (!GREEDY_REALLOC(addresses
, n_allocated
, n_addresses
+ n
))
893 memcpy(addresses
+ n_addresses
, da
, n
* sizeof(struct in_addr
));
898 if (n_addresses
<= 0)
901 return sd_dhcp_server_set_dns(s
, addresses
, n_addresses
);
904 static int link_push_ntp_to_dhcp_server(Link
*link
, sd_dhcp_server
*s
) {
905 _cleanup_free_
struct in_addr
*addresses
= NULL
;
906 size_t n_addresses
= 0, n_allocated
= 0;
912 log_debug("Copying NTP server information from %s", link
->ifname
);
914 STRV_FOREACH(a
, link
->network
->ntp
) {
917 /* Only look for IPv4 addresses */
918 if (inet_pton(AF_INET
, *a
, &ia
) <= 0)
921 if (!GREEDY_REALLOC(addresses
, n_allocated
, n_addresses
+ 1))
924 addresses
[n_addresses
++] = ia
;
927 if (link
->network
->dhcp_use_ntp
&&
929 const struct in_addr
*da
= NULL
;
932 n
= sd_dhcp_lease_get_ntp(link
->dhcp_lease
, &da
);
935 if (!GREEDY_REALLOC(addresses
, n_allocated
, n_addresses
+ n
))
938 memcpy(addresses
+ n_addresses
, da
, n
* sizeof(struct in_addr
));
943 if (n_addresses
<= 0)
946 return sd_dhcp_server_set_ntp(s
, addresses
, n_addresses
);
949 static int link_enter_set_addresses(Link
*link
) {
954 assert(link
->network
);
955 assert(link
->state
!= _LINK_STATE_INVALID
);
957 link_set_state(link
, LINK_STATE_SETTING_ADDRESSES
);
959 LIST_FOREACH(addresses
, ad
, link
->network
->static_addresses
) {
960 r
= address_configure(ad
, link
, address_handler
, false);
962 log_link_warning_errno(link
, r
, "Could not set addresses: %m");
963 link_enter_failed(link
);
967 link
->link_messages
++;
970 /* now that we can figure out a default address for the dhcp server,
972 if (link_dhcp4_server_enabled(link
)) {
975 bool acquired_uplink
= false;
977 address
= link_find_dhcp_server_address(link
);
979 log_link_warning(link
, "Failed to find suitable address for DHCPv4 server instance.");
980 link_enter_failed(link
);
984 /* use the server address' subnet as the pool */
985 r
= sd_dhcp_server_configure_pool(link
->dhcp_server
, &address
->in_addr
.in
, address
->prefixlen
,
986 link
->network
->dhcp_server_pool_offset
, link
->network
->dhcp_server_pool_size
);
991 r = sd_dhcp_server_set_router(link->dhcp_server,
992 &main_address->in_addr.in);
997 if (link
->network
->dhcp_server_max_lease_time_usec
> 0) {
998 r
= sd_dhcp_server_set_max_lease_time(
1000 DIV_ROUND_UP(link
->network
->dhcp_server_max_lease_time_usec
, USEC_PER_SEC
));
1005 if (link
->network
->dhcp_server_default_lease_time_usec
> 0) {
1006 r
= sd_dhcp_server_set_default_lease_time(
1008 DIV_ROUND_UP(link
->network
->dhcp_server_default_lease_time_usec
, USEC_PER_SEC
));
1013 if (link
->network
->dhcp_server_emit_dns
) {
1015 if (link
->network
->n_dhcp_server_dns
> 0)
1016 r
= sd_dhcp_server_set_dns(link
->dhcp_server
, link
->network
->dhcp_server_dns
, link
->network
->n_dhcp_server_dns
);
1018 uplink
= manager_find_uplink(link
->manager
, link
);
1019 acquired_uplink
= true;
1022 log_link_debug(link
, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1025 r
= link_push_dns_to_dhcp_server(uplink
, link
->dhcp_server
);
1028 log_link_warning_errno(link
, r
, "Failed to set DNS server for DHCP server, ignoring: %m");
1032 if (link
->network
->dhcp_server_emit_ntp
) {
1034 if (link
->network
->n_dhcp_server_ntp
> 0)
1035 r
= sd_dhcp_server_set_ntp(link
->dhcp_server
, link
->network
->dhcp_server_ntp
, link
->network
->n_dhcp_server_ntp
);
1037 if (!acquired_uplink
)
1038 uplink
= manager_find_uplink(link
->manager
, link
);
1041 log_link_debug(link
, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1044 r
= link_push_ntp_to_dhcp_server(uplink
, link
->dhcp_server
);
1048 log_link_warning_errno(link
, r
, "Failed to set NTP server for DHCP server, ignoring: %m");
1051 r
= sd_dhcp_server_set_emit_router(link
->dhcp_server
, link
->network
->dhcp_server_emit_router
);
1053 log_link_warning_errno(link
, r
, "Failed to set router emission for DHCP server: %m");
1057 if (link
->network
->dhcp_server_emit_timezone
) {
1058 _cleanup_free_
char *buffer
= NULL
;
1059 const char *tz
= NULL
;
1061 if (link
->network
->dhcp_server_timezone
)
1062 tz
= link
->network
->dhcp_server_timezone
;
1064 r
= get_timezone(&buffer
);
1066 log_warning_errno(r
, "Failed to determine timezone: %m");
1072 r
= sd_dhcp_server_set_timezone(link
->dhcp_server
, tz
);
1078 r
= sd_dhcp_server_start(link
->dhcp_server
);
1080 log_link_warning_errno(link
, r
, "Could not start DHCPv4 server instance: %m");
1082 link_enter_failed(link
);
1087 log_link_debug(link
, "Offering DHCPv4 leases");
1090 if (link
->link_messages
== 0)
1091 link_enter_set_routes(link
);
1093 log_link_debug(link
, "Setting addresses");
1098 int link_address_remove_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
1099 _cleanup_link_unref_ Link
*link
= userdata
;
1104 assert(link
->ifname
);
1106 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1109 r
= sd_netlink_message_get_errno(m
);
1110 if (r
< 0 && r
!= -EADDRNOTAVAIL
)
1111 log_link_warning_errno(link
, r
, "Could not drop address: %m");
1116 static int link_set_bridge_vlan(Link
*link
) {
1119 r
= br_vlan_configure(link
, link
->network
->pvid
, link
->network
->br_vid_bitmap
, link
->network
->br_untagged_bitmap
);
1121 log_link_error_errno(link
, r
, "Failed to assign VLANs to bridge port: %m");
1126 static int link_set_bridge_fdb(Link
*link
) {
1127 FdbEntry
*fdb_entry
;
1130 LIST_FOREACH(static_fdb_entries
, fdb_entry
, link
->network
->static_fdb_entries
) {
1131 r
= fdb_entry_configure(link
, fdb_entry
);
1133 log_link_error_errno(link
, r
, "Failed to add MAC entry to static MAC table: %m");
1141 static int link_set_proxy_arp(Link
*link
) {
1142 const char *p
= NULL
;
1145 if (!link_proxy_arp_enabled(link
))
1148 p
= strjoina("/proc/sys/net/ipv4/conf/", link
->ifname
, "/proxy_arp");
1150 r
= write_string_file(p
, one_zero(link
->network
->proxy_arp
), WRITE_STRING_FILE_VERIFY_ON_FAILURE
);
1152 log_link_warning_errno(link
, r
, "Cannot configure proxy ARP for interface: %m");
1157 static int link_set_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
1158 _cleanup_link_unref_ Link
*link
= userdata
;
1161 log_link_debug(link
, "Set link");
1163 r
= sd_netlink_message_get_errno(m
);
1164 if (r
< 0 && r
!= -EEXIST
) {
1165 log_link_error_errno(link
, r
, "Could not join netdev: %m");
1166 link_enter_failed(link
);
1173 static int set_hostname_handler(sd_bus_message
*m
, void *userdata
, sd_bus_error
*ret_error
) {
1174 _cleanup_link_unref_ Link
*link
= userdata
;
1175 const sd_bus_error
*e
;
1180 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1183 e
= sd_bus_message_get_error(m
);
1185 log_link_warning_errno(link
, sd_bus_error_get_errno(e
), "Could not set hostname: %s", e
->message
);
1190 int link_set_hostname(Link
*link
, const char *hostname
) {
1194 assert(link
->manager
);
1196 log_link_debug(link
, "Setting transient hostname: '%s'", strna(hostname
));
1198 if (!link
->manager
->bus
) {
1199 /* TODO: replace by assert when we can rely on kdbus */
1200 log_link_info(link
, "Not connected to system bus, ignoring transient hostname.");
1204 r
= sd_bus_call_method_async(
1207 "org.freedesktop.hostname1",
1208 "/org/freedesktop/hostname1",
1209 "org.freedesktop.hostname1",
1211 set_hostname_handler
,
1218 return log_link_error_errno(link
, r
, "Could not set transient hostname: %m");
1225 static int set_timezone_handler(sd_bus_message
*m
, void *userdata
, sd_bus_error
*ret_error
) {
1226 _cleanup_link_unref_ Link
*link
= userdata
;
1227 const sd_bus_error
*e
;
1232 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1235 e
= sd_bus_message_get_error(m
);
1237 log_link_warning_errno(link
, sd_bus_error_get_errno(e
), "Could not set timezone: %s", e
->message
);
1242 int link_set_timezone(Link
*link
, const char *tz
) {
1246 assert(link
->manager
);
1249 log_link_debug(link
, "Setting system timezone: '%s'", tz
);
1251 if (!link
->manager
->bus
) {
1252 log_link_info(link
, "Not connected to system bus, ignoring timezone.");
1256 r
= sd_bus_call_method_async(
1259 "org.freedesktop.timedate1",
1260 "/org/freedesktop/timedate1",
1261 "org.freedesktop.timedate1",
1263 set_timezone_handler
,
1269 return log_link_error_errno(link
, r
, "Could not set timezone: %m");
1276 static int set_mtu_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
1277 _cleanup_link_unref_ Link
*link
= userdata
;
1282 assert(link
->ifname
);
1284 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1287 r
= sd_netlink_message_get_errno(m
);
1289 log_link_warning_errno(link
, r
, "Could not set MTU: %m");
1294 int link_set_mtu(Link
*link
, uint32_t mtu
) {
1295 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1299 assert(link
->manager
);
1300 assert(link
->manager
->rtnl
);
1302 log_link_debug(link
, "Setting MTU: %" PRIu32
, mtu
);
1304 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1306 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1308 r
= sd_netlink_message_append_u32(req
, IFLA_MTU
, mtu
);
1310 return log_link_error_errno(link
, r
, "Could not append MTU: %m");
1312 r
= sd_netlink_call_async(link
->manager
->rtnl
, req
, set_mtu_handler
, link
, 0, NULL
);
1314 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1321 static int link_set_bridge(Link
*link
) {
1322 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1326 assert(link
->network
);
1328 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1330 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1332 r
= sd_rtnl_message_link_set_family(req
, PF_BRIDGE
);
1334 return log_link_error_errno(link
, r
, "Could not set message family: %m");
1336 r
= sd_netlink_message_open_container(req
, IFLA_PROTINFO
);
1338 return log_link_error_errno(link
, r
, "Could not append IFLA_PROTINFO attribute: %m");
1340 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_GUARD
, !link
->network
->use_bpdu
);
1342 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1344 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_MODE
, link
->network
->hairpin
);
1346 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_MODE attribute: %m");
1348 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_FAST_LEAVE
, link
->network
->fast_leave
);
1350 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1352 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_PROTECT
, !link
->network
->allow_port_to_be_root
);
1354 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
1356 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_UNICAST_FLOOD
, link
->network
->unicast_flood
);
1358 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
1360 if (link
->network
->cost
!= 0) {
1361 r
= sd_netlink_message_append_u32(req
, IFLA_BRPORT_COST
, link
->network
->cost
);
1363 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_COST attribute: %m");
1366 r
= sd_netlink_message_close_container(req
);
1368 return log_link_error_errno(link
, r
, "Could not append IFLA_LINKINFO attribute: %m");
1370 r
= sd_netlink_call_async(link
->manager
->rtnl
, req
, link_set_handler
, link
, 0, NULL
);
1372 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1379 static int link_lldp_save(Link
*link
) {
1380 _cleanup_free_
char *temp_path
= NULL
;
1381 _cleanup_fclose_
FILE *f
= NULL
;
1382 sd_lldp_neighbor
**l
= NULL
;
1386 assert(link
->lldp_file
);
1389 (void) unlink(link
->lldp_file
);
1393 r
= sd_lldp_get_neighbors(link
->lldp
, &l
);
1397 (void) unlink(link
->lldp_file
);
1403 r
= fopen_temporary(link
->lldp_file
, &f
, &temp_path
);
1407 fchmod(fileno(f
), 0644);
1409 for (i
= 0; i
< n
; i
++) {
1414 r
= sd_lldp_neighbor_get_raw(l
[i
], &p
, &sz
);
1419 (void) fwrite(&u
, 1, sizeof(u
), f
);
1420 (void) fwrite(p
, 1, sz
, f
);
1423 r
= fflush_and_check(f
);
1427 if (rename(temp_path
, link
->lldp_file
) < 0) {
1434 (void) unlink(link
->lldp_file
);
1436 (void) unlink(temp_path
);
1438 log_link_error_errno(link
, r
, "Failed to save LLDP data to %s: %m", link
->lldp_file
);
1442 for (i
= 0; i
< n
; i
++)
1443 sd_lldp_neighbor_unref(l
[i
]);
1450 static void lldp_handler(sd_lldp
*lldp
, sd_lldp_event event
, sd_lldp_neighbor
*n
, void *userdata
) {
1451 Link
*link
= userdata
;
1456 (void) link_lldp_save(link
);
1458 if (link_lldp_emit_enabled(link
) && event
== SD_LLDP_EVENT_ADDED
) {
1459 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1461 log_link_debug(link
, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1463 r
= link_lldp_emit_start(link
);
1465 log_link_warning_errno(link
, r
, "Failed to restart LLDP transmission: %m");
1469 static int link_acquire_ipv6_conf(Link
*link
) {
1474 if (link_dhcp6_enabled(link
)) {
1475 assert(link
->dhcp6_client
);
1476 assert(in_addr_is_link_local(AF_INET6
, (const union in_addr_union
*)&link
->ipv6ll_address
) > 0);
1478 /* start DHCPv6 client in stateless mode */
1479 r
= dhcp6_request_address(link
, true);
1480 if (r
< 0 && r
!= -EBUSY
)
1481 return log_link_warning_errno(link
, r
, "Could not acquire DHCPv6 lease: %m");
1483 log_link_debug(link
, "Acquiring DHCPv6 lease");
1486 if (link_ipv6_accept_ra_enabled(link
)) {
1487 assert(link
->ndisc
);
1489 log_link_debug(link
, "Discovering IPv6 routers");
1491 r
= sd_ndisc_start(link
->ndisc
);
1492 if (r
< 0 && r
!= -EBUSY
)
1493 return log_link_warning_errno(link
, r
, "Could not start IPv6 Router Discovery: %m");
1499 static int link_acquire_ipv4_conf(Link
*link
) {
1503 assert(link
->network
);
1504 assert(link
->manager
);
1505 assert(link
->manager
->event
);
1507 if (link_ipv4ll_enabled(link
)) {
1508 assert(link
->ipv4ll
);
1510 log_link_debug(link
, "Acquiring IPv4 link-local address");
1512 r
= sd_ipv4ll_start(link
->ipv4ll
);
1514 return log_link_warning_errno(link
, r
, "Could not acquire IPv4 link-local address: %m");
1517 if (link_dhcp4_enabled(link
)) {
1518 assert(link
->dhcp_client
);
1520 log_link_debug(link
, "Acquiring DHCPv4 lease");
1522 r
= sd_dhcp_client_start(link
->dhcp_client
);
1524 return log_link_warning_errno(link
, r
, "Could not acquire DHCPv4 lease: %m");
1530 static int link_acquire_conf(Link
*link
) {
1535 r
= link_acquire_ipv4_conf(link
);
1539 if (in_addr_is_null(AF_INET6
, (const union in_addr_union
*) &link
->ipv6ll_address
) == 0) {
1540 r
= link_acquire_ipv6_conf(link
);
1545 if (link_lldp_emit_enabled(link
)) {
1546 r
= link_lldp_emit_start(link
);
1548 return log_link_warning_errno(link
, r
, "Failed to start LLDP transmission: %m");
1554 bool link_has_carrier(Link
*link
) {
1555 /* see Documentation/networking/operstates.txt in the kernel sources */
1557 if (link
->kernel_operstate
== IF_OPER_UP
)
1560 if (link
->kernel_operstate
== IF_OPER_UNKNOWN
)
1561 /* operstate may not be implemented, so fall back to flags */
1562 if ((link
->flags
& IFF_LOWER_UP
) && !(link
->flags
& IFF_DORMANT
))
1568 static int link_up_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
1569 _cleanup_link_unref_ Link
*link
= userdata
;
1574 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1577 r
= sd_netlink_message_get_errno(m
);
1579 /* we warn but don't fail the link, as it may be
1581 log_link_warning_errno(link
, r
, "Could not bring up interface: %m");
1586 static int link_up(Link
*link
) {
1587 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1588 uint8_t ipv6ll_mode
;
1592 assert(link
->network
);
1593 assert(link
->manager
);
1594 assert(link
->manager
->rtnl
);
1596 log_link_debug(link
, "Bringing link up");
1598 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1600 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1602 /* set it free if not enslaved with networkd */
1603 if (!link
->network
->bridge
&& !link
->network
->bond
) {
1604 r
= sd_netlink_message_append_u32(req
, IFLA_MASTER
, 0);
1606 return log_link_error_errno(link
, r
, "Could not append IFLA_MASTER attribute: %m");
1609 r
= sd_rtnl_message_link_set_flags(req
, IFF_UP
, IFF_UP
);
1611 return log_link_error_errno(link
, r
, "Could not set link flags: %m");
1613 if (link
->network
->mac
) {
1614 r
= sd_netlink_message_append_ether_addr(req
, IFLA_ADDRESS
, link
->network
->mac
);
1616 return log_link_error_errno(link
, r
, "Could not set MAC address: %m");
1619 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
1620 for this interface, or if it is a bridge slave, then disable IPv6 else enable it. */
1621 (void) link_enable_ipv6(link
);
1623 if (link
->network
->mtu
) {
1624 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
1625 on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1626 if (link_ipv6_enabled(link
) && link
->network
->mtu
< IPV6_MIN_MTU
) {
1628 log_link_warning(link
, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU
) ", as "
1629 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU
) " bytes: %m");
1631 link
->network
->mtu
= IPV6_MIN_MTU
;
1634 r
= sd_netlink_message_append_u32(req
, IFLA_MTU
, link
->network
->mtu
);
1636 return log_link_error_errno(link
, r
, "Could not set MTU: %m");
1639 r
= sd_netlink_message_open_container(req
, IFLA_AF_SPEC
);
1641 return log_link_error_errno(link
, r
, "Could not open IFLA_AF_SPEC container: %m");
1643 if (link_ipv6_enabled(link
)) {
1644 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1645 r
= sd_netlink_message_open_container(req
, AF_INET6
);
1647 return log_link_error_errno(link
, r
, "Could not open AF_INET6 container: %m");
1649 if (!link_ipv6ll_enabled(link
))
1650 ipv6ll_mode
= IN6_ADDR_GEN_MODE_NONE
;
1652 const char *p
= NULL
;
1653 _cleanup_free_
char *stable_secret
= NULL
;
1655 p
= strjoina("/proc/sys/net/ipv6/conf/", link
->ifname
, "/stable_secret");
1656 r
= read_one_line_file(p
, &stable_secret
);
1659 ipv6ll_mode
= IN6_ADDR_GEN_MODE_EUI64
;
1661 ipv6ll_mode
= IN6_ADDR_GEN_MODE_STABLE_PRIVACY
;
1663 r
= sd_netlink_message_append_u8(req
, IFLA_INET6_ADDR_GEN_MODE
, ipv6ll_mode
);
1665 return log_link_error_errno(link
, r
, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1667 if (!in_addr_is_null(AF_INET6
, &link
->network
->ipv6_token
)) {
1668 r
= sd_netlink_message_append_in6_addr(req
, IFLA_INET6_TOKEN
, &link
->network
->ipv6_token
.in6
);
1670 return log_link_error_errno(link
, r
, "Could not append IFLA_INET6_TOKEN: %m");
1673 r
= sd_netlink_message_close_container(req
);
1675 return log_link_error_errno(link
, r
, "Could not close AF_INET6 container: %m");
1678 r
= sd_netlink_message_close_container(req
);
1680 return log_link_error_errno(link
, r
, "Could not close IFLA_AF_SPEC container: %m");
1682 r
= sd_netlink_call_async(link
->manager
->rtnl
, req
, link_up_handler
, link
, 0, NULL
);
1684 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1691 static int link_down_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
1692 _cleanup_link_unref_ Link
*link
= userdata
;
1697 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1700 r
= sd_netlink_message_get_errno(m
);
1702 log_link_warning_errno(link
, r
, "Could not bring down interface: %m");
1707 static int link_down(Link
*link
) {
1708 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1712 assert(link
->manager
);
1713 assert(link
->manager
->rtnl
);
1715 log_link_debug(link
, "Bringing link down");
1717 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
,
1718 RTM_SETLINK
, link
->ifindex
);
1720 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1722 r
= sd_rtnl_message_link_set_flags(req
, 0, IFF_UP
);
1724 return log_link_error_errno(link
, r
, "Could not set link flags: %m");
1726 r
= sd_netlink_call_async(link
->manager
->rtnl
, req
, link_down_handler
, link
, 0, NULL
);
1728 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1735 static int link_handle_bound_to_list(Link
*link
) {
1739 bool required_up
= false;
1740 bool link_is_up
= false;
1744 if (hashmap_isempty(link
->bound_to_links
))
1747 if (link
->flags
& IFF_UP
)
1750 HASHMAP_FOREACH (l
, link
->bound_to_links
, i
)
1751 if (link_has_carrier(l
)) {
1756 if (!required_up
&& link_is_up
) {
1757 r
= link_down(link
);
1760 } else if (required_up
&& !link_is_up
) {
1769 static int link_handle_bound_by_list(Link
*link
) {
1776 if (hashmap_isempty(link
->bound_by_links
))
1779 HASHMAP_FOREACH (l
, link
->bound_by_links
, i
) {
1780 r
= link_handle_bound_to_list(l
);
1788 static int link_put_carrier(Link
*link
, Link
*carrier
, Hashmap
**h
) {
1794 if (link
== carrier
)
1797 if (hashmap_get(*h
, INT_TO_PTR(carrier
->ifindex
)))
1800 r
= hashmap_ensure_allocated(h
, NULL
);
1804 r
= hashmap_put(*h
, INT_TO_PTR(carrier
->ifindex
), carrier
);
1811 static int link_new_bound_by_list(Link
*link
) {
1816 bool list_updated
= false;
1819 assert(link
->manager
);
1823 HASHMAP_FOREACH(carrier
, m
->links
, i
) {
1824 if (!carrier
->network
)
1827 if (strv_isempty(carrier
->network
->bind_carrier
))
1830 if (strv_fnmatch(carrier
->network
->bind_carrier
, link
->ifname
, 0)) {
1831 r
= link_put_carrier(link
, carrier
, &link
->bound_by_links
);
1835 list_updated
= true;
1842 HASHMAP_FOREACH(carrier
, link
->bound_by_links
, i
) {
1843 r
= link_put_carrier(carrier
, link
, &carrier
->bound_to_links
);
1847 link_dirty(carrier
);
1853 static int link_new_bound_to_list(Link
*link
) {
1858 bool list_updated
= false;
1861 assert(link
->manager
);
1866 if (strv_isempty(link
->network
->bind_carrier
))
1871 HASHMAP_FOREACH (carrier
, m
->links
, i
) {
1872 if (strv_fnmatch(link
->network
->bind_carrier
, carrier
->ifname
, 0)) {
1873 r
= link_put_carrier(link
, carrier
, &link
->bound_to_links
);
1877 list_updated
= true;
1884 HASHMAP_FOREACH (carrier
, link
->bound_to_links
, i
) {
1885 r
= link_put_carrier(carrier
, link
, &carrier
->bound_by_links
);
1889 link_dirty(carrier
);
1895 static int link_new_carrier_maps(Link
*link
) {
1898 r
= link_new_bound_by_list(link
);
1902 r
= link_handle_bound_by_list(link
);
1906 r
= link_new_bound_to_list(link
);
1910 r
= link_handle_bound_to_list(link
);
1917 static void link_free_bound_to_list(Link
*link
) {
1921 HASHMAP_FOREACH (bound_to
, link
->bound_to_links
, i
) {
1922 hashmap_remove(link
->bound_to_links
, INT_TO_PTR(bound_to
->ifindex
));
1924 if (hashmap_remove(bound_to
->bound_by_links
, INT_TO_PTR(link
->ifindex
)))
1925 link_dirty(bound_to
);
1931 static void link_free_bound_by_list(Link
*link
) {
1935 HASHMAP_FOREACH (bound_by
, link
->bound_by_links
, i
) {
1936 hashmap_remove(link
->bound_by_links
, INT_TO_PTR(bound_by
->ifindex
));
1938 if (hashmap_remove(bound_by
->bound_to_links
, INT_TO_PTR(link
->ifindex
))) {
1939 link_dirty(bound_by
);
1940 link_handle_bound_to_list(bound_by
);
1947 static void link_free_carrier_maps(Link
*link
) {
1948 bool list_updated
= false;
1952 if (!hashmap_isempty(link
->bound_to_links
)) {
1953 link_free_bound_to_list(link
);
1954 list_updated
= true;
1957 if (!hashmap_isempty(link
->bound_by_links
)) {
1958 link_free_bound_by_list(link
);
1959 list_updated
= true;
1968 void link_drop(Link
*link
) {
1969 if (!link
|| link
->state
== LINK_STATE_LINGER
)
1972 link_set_state(link
, LINK_STATE_LINGER
);
1974 link_free_carrier_maps(link
);
1976 log_link_debug(link
, "Link removed");
1978 (void)unlink(link
->state_file
);
1984 static int link_joined(Link
*link
) {
1988 assert(link
->network
);
1990 if (!hashmap_isempty(link
->bound_to_links
)) {
1991 r
= link_handle_bound_to_list(link
);
1994 } else if (!(link
->flags
& IFF_UP
)) {
1997 link_enter_failed(link
);
2002 if (link
->network
->bridge
) {
2003 r
= link_set_bridge(link
);
2005 log_link_error_errno(link
, r
, "Could not set bridge message: %m");
2008 if (link
->network
->bridge
|| streq("bridge", link
->kind
)) {
2009 r
= link_set_bridge_vlan(link
);
2011 log_link_error_errno(link
, r
, "Could not set bridge vlan: %m");
2014 return link_enter_set_addresses(link
);
2017 static int netdev_join_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
2018 _cleanup_link_unref_ Link
*link
= userdata
;
2022 assert(link
->network
);
2026 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
2029 r
= sd_netlink_message_get_errno(m
);
2030 if (r
< 0 && r
!= -EEXIST
) {
2031 log_link_error_errno(link
, r
, "Could not join netdev: %m");
2032 link_enter_failed(link
);
2035 log_link_debug(link
, "Joined netdev");
2037 if (link
->enslaving
<= 0)
2043 static int link_enter_join_netdev(Link
*link
) {
2049 assert(link
->network
);
2050 assert(link
->state
== LINK_STATE_PENDING
);
2052 link_set_state(link
, LINK_STATE_ENSLAVING
);
2056 if (!link
->network
->bridge
&&
2057 !link
->network
->bond
&&
2058 hashmap_isempty(link
->network
->stacked_netdevs
))
2059 return link_joined(link
);
2061 if (link
->network
->bond
) {
2062 log_struct(LOG_DEBUG
,
2063 LOG_LINK_INTERFACE(link
),
2064 LOG_NETDEV_INTERFACE(link
->network
->bond
),
2065 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", link
->network
->bond
->ifname
),
2068 r
= netdev_join(link
->network
->bond
, link
, netdev_join_handler
);
2070 log_struct_errno(LOG_WARNING
, r
,
2071 LOG_LINK_INTERFACE(link
),
2072 LOG_NETDEV_INTERFACE(link
->network
->bond
),
2073 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", link
->network
->bond
->ifname
),
2076 link_enter_failed(link
);
2083 if (link
->network
->bridge
) {
2084 log_struct(LOG_DEBUG
,
2085 LOG_LINK_INTERFACE(link
),
2086 LOG_NETDEV_INTERFACE(link
->network
->bridge
),
2087 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", link
->network
->bridge
->ifname
),
2090 r
= netdev_join(link
->network
->bridge
, link
, netdev_join_handler
);
2092 log_struct_errno(LOG_WARNING
, r
,
2093 LOG_LINK_INTERFACE(link
),
2094 LOG_NETDEV_INTERFACE(link
->network
->bridge
),
2095 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", link
->network
->bridge
->ifname
),
2097 link_enter_failed(link
);
2104 HASHMAP_FOREACH(netdev
, link
->network
->stacked_netdevs
, i
) {
2106 log_struct(LOG_DEBUG
,
2107 LOG_LINK_INTERFACE(link
),
2108 LOG_NETDEV_INTERFACE(netdev
),
2109 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", netdev
->ifname
),
2112 r
= netdev_join(netdev
, link
, netdev_join_handler
);
2114 log_struct_errno(LOG_WARNING
, r
,
2115 LOG_LINK_INTERFACE(link
),
2116 LOG_NETDEV_INTERFACE(netdev
),
2117 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", netdev
->ifname
),
2119 link_enter_failed(link
);
2129 static int link_set_ipv4_forward(Link
*link
) {
2132 if (!link_ipv4_forward_enabled(link
))
2135 /* We propagate the forwarding flag from one interface to the
2136 * global setting one way. This means: as long as at least one
2137 * interface was configured at any time that had IP forwarding
2138 * enabled the setting will stay on for good. We do this
2139 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2140 * somewhat in sync (see below). */
2142 r
= write_string_file("/proc/sys/net/ipv4/ip_forward", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE
);
2144 log_link_warning_errno(link
, r
, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
2149 static int link_set_ipv6_forward(Link
*link
) {
2152 if (!link_ipv6_forward_enabled(link
))
2155 /* On Linux, the IPv6 stack does not not know a per-interface
2156 * packet forwarding setting: either packet forwarding is on
2157 * for all, or off for all. We hence don't bother with a
2158 * per-interface setting, but simply propagate the interface
2159 * flag, if it is set, to the global flag, one-way. Note that
2160 * while IPv4 would allow a per-interface flag, we expose the
2161 * same behaviour there and also propagate the setting from
2162 * one to all, to keep things simple (see above). */
2164 r
= write_string_file("/proc/sys/net/ipv6/conf/all/forwarding", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE
);
2166 log_link_warning_errno(link
, r
, "Cannot configure IPv6 packet forwarding, ignoring: %m");
2171 static int link_set_ipv6_privacy_extensions(Link
*link
) {
2172 char buf
[DECIMAL_STR_MAX(unsigned) + 1];
2173 IPv6PrivacyExtensions s
;
2174 const char *p
= NULL
;
2177 s
= link_ipv6_privacy_extensions(link
);
2181 p
= strjoina("/proc/sys/net/ipv6/conf/", link
->ifname
, "/use_tempaddr");
2182 xsprintf(buf
, "%u", (unsigned) link
->network
->ipv6_privacy_extensions
);
2184 r
= write_string_file(p
, buf
, WRITE_STRING_FILE_VERIFY_ON_FAILURE
);
2186 log_link_warning_errno(link
, r
, "Cannot configure IPv6 privacy extension for interface: %m");
2191 static int link_set_ipv6_accept_ra(Link
*link
) {
2192 const char *p
= NULL
;
2195 /* Make this a NOP if IPv6 is not available */
2196 if (!socket_ipv6_is_supported())
2199 if (link
->flags
& IFF_LOOPBACK
)
2205 p
= strjoina("/proc/sys/net/ipv6/conf/", link
->ifname
, "/accept_ra");
2207 /* We handle router advertisements ourselves, tell the kernel to GTFO */
2208 r
= write_string_file(p
, "0", WRITE_STRING_FILE_VERIFY_ON_FAILURE
);
2210 log_link_warning_errno(link
, r
, "Cannot disable kernel IPv6 accept_ra for interface: %m");
2215 static int link_set_ipv6_dad_transmits(Link
*link
) {
2216 char buf
[DECIMAL_STR_MAX(int) + 1];
2217 const char *p
= NULL
;
2220 /* Make this a NOP if IPv6 is not available */
2221 if (!socket_ipv6_is_supported())
2224 if (link
->flags
& IFF_LOOPBACK
)
2230 if (link
->network
->ipv6_dad_transmits
< 0)
2233 p
= strjoina("/proc/sys/net/ipv6/conf/", link
->ifname
, "/dad_transmits");
2234 xsprintf(buf
, "%i", link
->network
->ipv6_dad_transmits
);
2236 r
= write_string_file(p
, buf
, WRITE_STRING_FILE_VERIFY_ON_FAILURE
);
2238 log_link_warning_errno(link
, r
, "Cannot set IPv6 dad transmits for interface: %m");
2243 static int link_set_ipv6_hop_limit(Link
*link
) {
2244 char buf
[DECIMAL_STR_MAX(int) + 1];
2245 const char *p
= NULL
;
2248 /* Make this a NOP if IPv6 is not available */
2249 if (!socket_ipv6_is_supported())
2252 if (link
->flags
& IFF_LOOPBACK
)
2258 if (link
->network
->ipv6_hop_limit
< 0)
2261 p
= strjoina("/proc/sys/net/ipv6/conf/", link
->ifname
, "/hop_limit");
2262 xsprintf(buf
, "%i", link
->network
->ipv6_hop_limit
);
2264 r
= write_string_file(p
, buf
, WRITE_STRING_FILE_VERIFY_ON_FAILURE
);
2266 log_link_warning_errno(link
, r
, "Cannot set IPv6 hop limit for interface: %m");
2271 static int link_drop_foreign_config(Link
*link
) {
2277 SET_FOREACH(address
, link
->addresses_foreign
, i
) {
2278 /* we consider IPv6LL addresses to be managed by the kernel */
2279 if (address
->family
== AF_INET6
&& in_addr_is_link_local(AF_INET6
, &address
->in_addr
) == 1)
2282 r
= address_remove(address
, link
, link_address_remove_handler
);
2287 SET_FOREACH(route
, link
->routes_foreign
, i
) {
2288 /* do not touch routes managed by the kernel */
2289 if (route
->protocol
== RTPROT_KERNEL
)
2292 r
= route_remove(route
, link
, link_route_remove_handler
);
2300 static int link_update_lldp(Link
*link
) {
2308 if (link
->flags
& IFF_UP
) {
2309 r
= sd_lldp_start(link
->lldp
);
2311 log_link_debug(link
, "Started LLDP.");
2313 r
= sd_lldp_stop(link
->lldp
);
2315 log_link_debug(link
, "Stopped LLDP.");
2321 static int link_configure(Link
*link
) {
2325 assert(link
->network
);
2326 assert(link
->state
== LINK_STATE_PENDING
);
2328 /* Drop foreign config, but ignore loopback or critical devices.
2329 * We do not want to remove loopback address or addresses used for root NFS. */
2330 if (!(link
->flags
& IFF_LOOPBACK
) && !(link
->network
->dhcp_critical
)) {
2331 r
= link_drop_foreign_config(link
);
2336 r
= link_set_bridge_fdb(link
);
2340 r
= link_set_proxy_arp(link
);
2344 r
= link_set_ipv4_forward(link
);
2348 r
= link_set_ipv6_forward(link
);
2352 r
= link_set_ipv6_privacy_extensions(link
);
2356 r
= link_set_ipv6_accept_ra(link
);
2360 r
= link_set_ipv6_dad_transmits(link
);
2364 r
= link_set_ipv6_hop_limit(link
);
2368 if (link_ipv4ll_enabled(link
)) {
2369 r
= ipv4ll_configure(link
);
2374 if (link_dhcp4_enabled(link
)) {
2375 r
= dhcp4_configure(link
);
2380 if (link_dhcp4_server_enabled(link
)) {
2381 r
= sd_dhcp_server_new(&link
->dhcp_server
, link
->ifindex
);
2385 r
= sd_dhcp_server_attach_event(link
->dhcp_server
, NULL
, 0);
2390 if (link_dhcp6_enabled(link
) ||
2391 link_ipv6_accept_ra_enabled(link
)) {
2392 r
= dhcp6_configure(link
);
2397 if (link_ipv6_accept_ra_enabled(link
)) {
2398 r
= ndisc_configure(link
);
2403 if (link_lldp_rx_enabled(link
)) {
2404 r
= sd_lldp_new(&link
->lldp
);
2408 r
= sd_lldp_set_ifindex(link
->lldp
, link
->ifindex
);
2412 r
= sd_lldp_match_capabilities(link
->lldp
,
2413 link
->network
->lldp_mode
== LLDP_MODE_ROUTERS_ONLY
?
2414 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS
:
2415 SD_LLDP_SYSTEM_CAPABILITIES_ALL
);
2419 r
= sd_lldp_set_filter_address(link
->lldp
, &link
->mac
);
2423 r
= sd_lldp_attach_event(link
->lldp
, NULL
, 0);
2427 r
= sd_lldp_set_callback(link
->lldp
, lldp_handler
, link
);
2431 r
= link_update_lldp(link
);
2436 if (link_has_carrier(link
)) {
2437 r
= link_acquire_conf(link
);
2442 return link_enter_join_netdev(link
);
2445 static int link_initialized_and_synced(sd_netlink
*rtnl
, sd_netlink_message
*m
,
2447 _cleanup_link_unref_ Link
*link
= userdata
;
2452 assert(link
->ifname
);
2453 assert(link
->manager
);
2455 if (link
->state
!= LINK_STATE_PENDING
)
2458 log_link_debug(link
, "Link state is up-to-date");
2460 r
= link_new_bound_by_list(link
);
2464 r
= link_handle_bound_by_list(link
);
2468 if (!link
->network
) {
2469 r
= network_get(link
->manager
, link
->udev_device
, link
->ifname
,
2470 &link
->mac
, &network
);
2472 link_enter_unmanaged(link
);
2477 if (link
->flags
& IFF_LOOPBACK
) {
2478 if (network
->link_local
!= ADDRESS_FAMILY_NO
)
2479 log_link_debug(link
, "Ignoring link-local autoconfiguration for loopback link");
2481 if (network
->dhcp
!= ADDRESS_FAMILY_NO
)
2482 log_link_debug(link
, "Ignoring DHCP clients for loopback link");
2484 if (network
->dhcp_server
)
2485 log_link_debug(link
, "Ignoring DHCP server for loopback link");
2488 r
= network_apply(link
->manager
, network
, link
);
2493 r
= link_new_bound_to_list(link
);
2497 r
= link_configure(link
);
2504 int link_initialized(Link
*link
, struct udev_device
*device
) {
2505 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
2509 assert(link
->manager
);
2510 assert(link
->manager
->rtnl
);
2513 if (link
->state
!= LINK_STATE_PENDING
)
2516 if (link
->udev_device
)
2519 log_link_debug(link
, "udev initialized link");
2521 link
->udev_device
= udev_device_ref(device
);
2523 /* udev has initialized the link, but we don't know if we have yet
2524 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2525 * when it returns we know that the pending NEWLINKs have already been
2526 * processed and that we are up-to-date */
2528 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_GETLINK
,
2533 r
= sd_netlink_call_async(link
->manager
->rtnl
, req
,
2534 link_initialized_and_synced
, link
, 0, NULL
);
2543 static int link_load(Link
*link
) {
2544 _cleanup_free_
char *network_file
= NULL
,
2547 *dhcp4_address
= NULL
,
2548 *ipv4ll_address
= NULL
;
2549 union in_addr_union address
;
2550 union in_addr_union route_dst
;
2556 r
= parse_env_file(link
->state_file
, NEWLINE
,
2557 "NETWORK_FILE", &network_file
,
2558 "ADDRESSES", &addresses
,
2560 "DHCP4_ADDRESS", &dhcp4_address
,
2561 "IPV4LL_ADDRESS", &ipv4ll_address
,
2563 if (r
< 0 && r
!= -ENOENT
)
2564 return log_link_error_errno(link
, r
, "Failed to read %s: %m", link
->state_file
);
2571 suffix
= strrchr(network_file
, '.');
2573 log_link_debug(link
, "Failed to get network name from %s", network_file
);
2574 goto network_file_fail
;
2578 r
= network_get_by_name(link
->manager
, basename(network_file
), &network
);
2580 log_link_debug_errno(link
, r
, "Failed to get network %s: %m", basename(network_file
));
2581 goto network_file_fail
;
2584 r
= network_apply(link
->manager
, network
, link
);
2586 return log_link_error_errno(link
, r
, "Failed to apply network %s: %m", basename(network_file
));
2595 _cleanup_free_
char *address_str
= NULL
;
2596 char *prefixlen_str
;
2598 unsigned char prefixlen
;
2600 r
= extract_first_word(&p
, &address_str
, NULL
, 0);
2602 log_link_debug_errno(link
, r
, "Failed to extract next address string: %m");
2608 prefixlen_str
= strchr(address_str
, '/');
2609 if (!prefixlen_str
) {
2610 log_link_debug(link
, "Failed to parse address and prefix length %s", address_str
);
2614 *prefixlen_str
++ = '\0';
2616 r
= sscanf(prefixlen_str
, "%hhu", &prefixlen
);
2618 log_link_error(link
, "Failed to parse prefixlen %s", prefixlen_str
);
2622 r
= in_addr_from_string_auto(address_str
, &family
, &address
);
2624 log_link_debug_errno(link
, r
, "Failed to parse address %s: %m", address_str
);
2628 r
= address_add(link
, family
, &address
, prefixlen
, NULL
);
2630 return log_link_error_errno(link
, r
, "Failed to add address: %m");
2639 _cleanup_free_
char *route_str
= NULL
;
2640 _cleanup_(sd_event_source_unrefp
) sd_event_source
*expire
= NULL
;
2642 char *prefixlen_str
;
2644 unsigned char prefixlen
, tos
, table
;
2647 r
= extract_first_word(&p
, &route_str
, NULL
, 0);
2649 log_link_debug_errno(link
, r
, "Failed to extract next route string: %m");
2655 prefixlen_str
= strchr(route_str
, '/');
2656 if (!prefixlen_str
) {
2657 log_link_debug(link
, "Failed to parse route %s", route_str
);
2661 *prefixlen_str
++ = '\0';
2663 r
= sscanf(prefixlen_str
, "%hhu/%hhu/%"SCNu32
"/%hhu/"USEC_FMT
, &prefixlen
, &tos
, &priority
, &table
, &lifetime
);
2665 log_link_debug(link
,
2666 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
2671 r
= in_addr_from_string_auto(route_str
, &family
, &route_dst
);
2673 log_link_debug_errno(link
, r
, "Failed to parse route destination %s: %m", route_str
);
2677 r
= route_add(link
, family
, &route_dst
, prefixlen
, tos
, priority
, table
, &route
);
2679 return log_link_error_errno(link
, r
, "Failed to add route: %m");
2681 if (lifetime
!= USEC_INFINITY
) {
2682 r
= sd_event_add_time(link
->manager
->event
, &expire
, clock_boottime_or_monotonic(), lifetime
,
2683 0, route_expire_handler
, route
);
2685 log_link_warning_errno(link
, r
, "Could not arm route expiration handler: %m");
2688 route
->lifetime
= lifetime
;
2689 sd_event_source_unref(route
->expire
);
2690 route
->expire
= expire
;
2695 if (dhcp4_address
) {
2696 r
= in_addr_from_string(AF_INET
, dhcp4_address
, &address
);
2698 log_link_debug_errno(link
, r
, "Falied to parse DHCPv4 address %s: %m", dhcp4_address
);
2699 goto dhcp4_address_fail
;
2702 r
= sd_dhcp_client_new(&link
->dhcp_client
);
2704 return log_link_error_errno(link
, r
, "Falied to create DHCPv4 client: %m");
2706 r
= sd_dhcp_client_set_request_address(link
->dhcp_client
, &address
.in
);
2708 return log_link_error_errno(link
, r
, "Falied to set inital DHCPv4 address %s: %m", dhcp4_address
);
2713 if (ipv4ll_address
) {
2714 r
= in_addr_from_string(AF_INET
, ipv4ll_address
, &address
);
2716 log_link_debug_errno(link
, r
, "Falied to parse IPv4LL address %s: %m", ipv4ll_address
);
2717 goto ipv4ll_address_fail
;
2720 r
= sd_ipv4ll_new(&link
->ipv4ll
);
2722 return log_link_error_errno(link
, r
, "Falied to create IPv4LL client: %m");
2724 r
= sd_ipv4ll_set_address(link
->ipv4ll
, &address
.in
);
2726 return log_link_error_errno(link
, r
, "Falied to set inital IPv4LL address %s: %m", ipv4ll_address
);
2729 ipv4ll_address_fail
:
2734 int link_add(Manager
*m
, sd_netlink_message
*message
, Link
**ret
) {
2736 _cleanup_udev_device_unref_
struct udev_device
*device
= NULL
;
2737 char ifindex_str
[2 + DECIMAL_STR_MAX(int)];
2745 r
= link_new(m
, message
, ret
);
2751 log_link_debug(link
, "Link %d added", link
->ifindex
);
2753 r
= link_load(link
);
2757 if (detect_container() <= 0) {
2758 /* not in a container, udev will be around */
2759 sprintf(ifindex_str
, "n%d", link
->ifindex
);
2760 device
= udev_device_new_from_device_id(m
->udev
, ifindex_str
);
2762 r
= log_link_warning_errno(link
, errno
, "Could not find udev device: %m");
2766 if (udev_device_get_is_initialized(device
) <= 0) {
2768 log_link_debug(link
, "link pending udev initialization...");
2772 r
= link_initialized(link
, device
);
2776 /* we are calling a callback directly, so must take a ref */
2779 r
= link_initialized_and_synced(m
->rtnl
, NULL
, link
);
2786 link_enter_failed(link
);
2790 int link_ipv6ll_gained(Link
*link
, const struct in6_addr
*address
) {
2795 log_link_info(link
, "Gained IPv6LL");
2797 link
->ipv6ll_address
= *address
;
2798 link_check_ready(link
);
2800 if (!IN_SET(link
->state
, LINK_STATE_PENDING
, LINK_STATE_UNMANAGED
, LINK_STATE_FAILED
)) {
2801 r
= link_acquire_ipv6_conf(link
);
2803 link_enter_failed(link
);
2811 static int link_carrier_gained(Link
*link
) {
2816 if (!IN_SET(link
->state
, LINK_STATE_PENDING
, LINK_STATE_UNMANAGED
, LINK_STATE_FAILED
)) {
2817 r
= link_acquire_conf(link
);
2819 link_enter_failed(link
);
2823 r
= link_enter_set_addresses(link
);
2828 r
= link_handle_bound_by_list(link
);
2835 static int link_carrier_lost(Link
*link
) {
2840 r
= link_stop_clients(link
);
2842 link_enter_failed(link
);
2846 r
= link_handle_bound_by_list(link
);
2853 int link_carrier_reset(Link
*link
) {
2858 if (link_has_carrier(link
)) {
2859 r
= link_carrier_lost(link
);
2863 r
= link_carrier_gained(link
);
2867 log_link_info(link
, "Reset carrier");
2873 int link_update(Link
*link
, sd_netlink_message
*m
) {
2874 struct ether_addr mac
;
2877 bool had_carrier
, carrier_gained
, carrier_lost
;
2881 assert(link
->ifname
);
2884 if (link
->state
== LINK_STATE_LINGER
) {
2886 log_link_info(link
, "Link readded");
2887 link_set_state(link
, LINK_STATE_ENSLAVING
);
2889 r
= link_new_carrier_maps(link
);
2894 r
= sd_netlink_message_read_string(m
, IFLA_IFNAME
, &ifname
);
2895 if (r
>= 0 && !streq(ifname
, link
->ifname
)) {
2896 log_link_info(link
, "Renamed to %s", ifname
);
2898 link_free_carrier_maps(link
);
2900 r
= free_and_strdup(&link
->ifname
, ifname
);
2904 r
= link_new_carrier_maps(link
);
2909 r
= sd_netlink_message_read_u32(m
, IFLA_MTU
, &mtu
);
2910 if (r
>= 0 && mtu
> 0) {
2912 if (!link
->original_mtu
) {
2913 link
->original_mtu
= mtu
;
2914 log_link_debug(link
, "Saved original MTU: %" PRIu32
, link
->original_mtu
);
2917 if (link
->dhcp_client
) {
2918 r
= sd_dhcp_client_set_mtu(link
->dhcp_client
,
2921 log_link_warning_errno(link
, r
, "Could not update MTU in DHCP client: %m");
2927 /* The kernel may broadcast NEWLINK messages without the MAC address
2928 set, simply ignore them. */
2929 r
= sd_netlink_message_read_ether_addr(m
, IFLA_ADDRESS
, &mac
);
2931 if (memcmp(link
->mac
.ether_addr_octet
, mac
.ether_addr_octet
,
2934 memcpy(link
->mac
.ether_addr_octet
, mac
.ether_addr_octet
,
2937 log_link_debug(link
, "MAC address: "
2938 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
2939 mac
.ether_addr_octet
[0],
2940 mac
.ether_addr_octet
[1],
2941 mac
.ether_addr_octet
[2],
2942 mac
.ether_addr_octet
[3],
2943 mac
.ether_addr_octet
[4],
2944 mac
.ether_addr_octet
[5]);
2947 r
= sd_ipv4ll_set_mac(link
->ipv4ll
, &link
->mac
);
2949 return log_link_warning_errno(link
, r
, "Could not update MAC address in IPv4LL client: %m");
2952 if (link
->dhcp_client
) {
2953 const DUID
*duid
= link_duid(link
);
2955 r
= sd_dhcp_client_set_mac(link
->dhcp_client
,
2956 (const uint8_t *) &link
->mac
,
2960 return log_link_warning_errno(link
, r
, "Could not update MAC address in DHCP client: %m");
2962 r
= sd_dhcp_client_set_iaid_duid(link
->dhcp_client
,
2963 link
->network
->iaid
,
2965 duid
->raw_data_len
> 0 ? duid
->raw_data
: NULL
,
2966 duid
->raw_data_len
);
2968 return log_link_warning_errno(link
, r
, "Could not update DUID/IAID in DHCP client: %m");
2971 if (link
->dhcp6_client
) {
2972 const DUID
* duid
= link_duid(link
);
2974 r
= sd_dhcp6_client_set_mac(link
->dhcp6_client
,
2975 (const uint8_t *) &link
->mac
,
2979 return log_link_warning_errno(link
, r
, "Could not update MAC address in DHCPv6 client: %m");
2981 r
= sd_dhcp6_client_set_iaid(link
->dhcp6_client
,
2982 link
->network
->iaid
);
2984 return log_link_warning_errno(link
, r
, "Could not update DHCPv6 IAID: %m");
2986 r
= sd_dhcp6_client_set_duid(link
->dhcp6_client
,
2988 duid
->raw_data_len
> 0 ? duid
->raw_data
: NULL
,
2989 duid
->raw_data_len
);
2991 return log_link_warning_errno(link
, r
, "Could not update DHCPv6 DUID: %m");
2996 had_carrier
= link_has_carrier(link
);
2998 r
= link_update_flags(link
, m
);
3002 r
= link_update_lldp(link
);
3006 carrier_gained
= !had_carrier
&& link_has_carrier(link
);
3007 carrier_lost
= had_carrier
&& !link_has_carrier(link
);
3009 if (carrier_gained
) {
3010 log_link_info(link
, "Gained carrier");
3012 r
= link_carrier_gained(link
);
3015 } else if (carrier_lost
) {
3016 log_link_info(link
, "Lost carrier");
3018 r
= link_carrier_lost(link
);
3026 static void print_link_hashmap(FILE *f
, const char *prefix
, Hashmap
* h
) {
3034 if (hashmap_isempty(h
))
3038 HASHMAP_FOREACH(link
, h
, i
) {
3042 fprintf(f
, "%i", link
->ifindex
);
3049 int link_save(Link
*link
) {
3050 _cleanup_free_
char *temp_path
= NULL
;
3051 _cleanup_fclose_
FILE *f
= NULL
;
3052 const char *admin_state
, *oper_state
;
3059 assert(link
->state_file
);
3060 assert(link
->lease_file
);
3061 assert(link
->manager
);
3063 if (link
->state
== LINK_STATE_LINGER
) {
3064 unlink(link
->state_file
);
3068 link_lldp_save(link
);
3070 admin_state
= link_state_to_string(link
->state
);
3071 assert(admin_state
);
3073 oper_state
= link_operstate_to_string(link
->operstate
);
3076 r
= fopen_temporary(link
->state_file
, &f
, &temp_path
);
3080 fchmod(fileno(f
), 0644);
3083 "# This is private data. Do not parse.\n"
3086 admin_state
, oper_state
);
3088 if (link
->network
) {
3090 sd_dhcp6_lease
*dhcp6_lease
= NULL
;
3091 const char *dhcp_domainname
= NULL
;
3092 char **dhcp6_domains
= NULL
;
3094 if (link
->dhcp6_client
) {
3095 r
= sd_dhcp6_client_get_lease(link
->dhcp6_client
, &dhcp6_lease
);
3096 if (r
< 0 && r
!= -ENOMSG
)
3097 log_link_debug(link
, "No DHCPv6 lease");
3100 fprintf(f
, "NETWORK_FILE=%s\n", link
->network
->filename
);
3104 fputstrv(f
, link
->network
->dns
, NULL
, &space
);
3106 if (link
->network
->dhcp_use_dns
&&
3108 const struct in_addr
*addresses
;
3110 r
= sd_dhcp_lease_get_dns(link
->dhcp_lease
, &addresses
);
3114 serialize_in_addrs(f
, addresses
, r
);
3119 if (link
->network
->dhcp_use_dns
&& dhcp6_lease
) {
3120 struct in6_addr
*in6_addrs
;
3122 r
= sd_dhcp6_lease_get_dns(dhcp6_lease
, &in6_addrs
);
3126 serialize_in6_addrs(f
, in6_addrs
, r
);
3131 /* Make sure to flush out old entries before we use the NDISC data */
3134 if (link
->network
->dhcp_use_dns
&& link
->ndisc_rdnss
) {
3137 SET_FOREACH(dd
, link
->ndisc_rdnss
, i
) {
3141 serialize_in6_addrs(f
, &dd
->address
, 1);
3150 fputstrv(f
, link
->network
->ntp
, NULL
, &space
);
3152 if (link
->network
->dhcp_use_ntp
&&
3154 const struct in_addr
*addresses
;
3156 r
= sd_dhcp_lease_get_ntp(link
->dhcp_lease
, &addresses
);
3160 serialize_in_addrs(f
, addresses
, r
);
3165 if (link
->network
->dhcp_use_ntp
&& dhcp6_lease
) {
3166 struct in6_addr
*in6_addrs
;
3169 r
= sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease
,
3174 serialize_in6_addrs(f
, in6_addrs
, r
);
3178 r
= sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease
, &hosts
);
3180 fputstrv(f
, hosts
, NULL
, &space
);
3185 if (link
->network
->dhcp_use_domains
!= DHCP_USE_DOMAINS_NO
) {
3186 if (link
->dhcp_lease
)
3187 (void) sd_dhcp_lease_get_domainname(link
->dhcp_lease
, &dhcp_domainname
);
3189 (void) sd_dhcp6_lease_get_domains(dhcp6_lease
, &dhcp6_domains
);
3192 fputs("DOMAINS=", f
);
3193 fputstrv(f
, link
->network
->search_domains
, NULL
, &space
);
3195 if (link
->network
->dhcp_use_domains
== DHCP_USE_DOMAINS_YES
) {
3198 if (dhcp_domainname
)
3199 fputs_with_space(f
, dhcp_domainname
, NULL
, &space
);
3201 fputstrv(f
, dhcp6_domains
, NULL
, &space
);
3203 SET_FOREACH(dd
, link
->ndisc_dnssl
, i
)
3204 fputs_with_space(f
, NDISC_DNSSL_DOMAIN(dd
), NULL
, &space
);
3209 fputs("ROUTE_DOMAINS=", f
);
3210 fputstrv(f
, link
->network
->route_domains
, NULL
, NULL
);
3212 if (link
->network
->dhcp_use_domains
== DHCP_USE_DOMAINS_ROUTE
) {
3215 if (dhcp_domainname
)
3216 fputs_with_space(f
, dhcp_domainname
, NULL
, &space
);
3218 fputstrv(f
, dhcp6_domains
, NULL
, &space
);
3220 SET_FOREACH(dd
, link
->ndisc_dnssl
, i
)
3221 fputs_with_space(f
, NDISC_DNSSL_DOMAIN(dd
), NULL
, &space
);
3226 fprintf(f
, "LLMNR=%s\n",
3227 resolve_support_to_string(link
->network
->llmnr
));
3228 fprintf(f
, "MDNS=%s\n",
3229 resolve_support_to_string(link
->network
->mdns
));
3231 if (link
->network
->dnssec_mode
!= _DNSSEC_MODE_INVALID
)
3232 fprintf(f
, "DNSSEC=%s\n",
3233 dnssec_mode_to_string(link
->network
->dnssec_mode
));
3235 if (!set_isempty(link
->network
->dnssec_negative_trust_anchors
)) {
3238 fputs("DNSSEC_NTA=", f
);
3240 SET_FOREACH(n
, link
->network
->dnssec_negative_trust_anchors
, i
)
3241 fputs_with_space(f
, n
, NULL
, &space
);
3245 fputs("ADDRESSES=", f
);
3247 SET_FOREACH(a
, link
->addresses
, i
) {
3248 _cleanup_free_
char *address_str
= NULL
;
3250 r
= in_addr_to_string(a
->family
, &a
->in_addr
, &address_str
);
3254 fprintf(f
, "%s%s/%u", space
? " " : "", address_str
, a
->prefixlen
);
3259 fputs("ROUTES=", f
);
3261 SET_FOREACH(route
, link
->routes
, i
) {
3262 _cleanup_free_
char *route_str
= NULL
;
3264 r
= in_addr_to_string(route
->family
, &route
->dst
, &route_str
);
3268 fprintf(f
, "%s%s/%hhu/%hhu/%"PRIu32
"/%hhu/"USEC_FMT
, space
? " " : "", route_str
,
3269 route
->dst_prefixlen
, route
->tos
, route
->priority
, route
->table
, route
->lifetime
);
3276 print_link_hashmap(f
, "CARRIER_BOUND_TO=", link
->bound_to_links
);
3277 print_link_hashmap(f
, "CARRIER_BOUND_BY=", link
->bound_by_links
);
3279 if (link
->dhcp_lease
) {
3280 struct in_addr address
;
3281 const char *tz
= NULL
;
3283 assert(link
->network
);
3285 r
= sd_dhcp_lease_get_timezone(link
->dhcp_lease
, &tz
);
3287 fprintf(f
, "TIMEZONE=%s\n", tz
);
3289 r
= sd_dhcp_lease_get_address(link
->dhcp_lease
, &address
);
3291 fputs("DHCP4_ADDRESS=", f
);
3292 serialize_in_addrs(f
, &address
, 1);
3296 r
= dhcp_lease_save(link
->dhcp_lease
, link
->lease_file
);
3304 unlink(link
->lease_file
);
3307 struct in_addr address
;
3309 r
= sd_ipv4ll_get_address(link
->ipv4ll
, &address
);
3311 fputs("IPV4LL_ADDRESS=", f
);
3312 serialize_in_addrs(f
, &address
, 1);
3317 r
= fflush_and_check(f
);
3321 if (rename(temp_path
, link
->state_file
) < 0) {
3329 (void) unlink(link
->state_file
);
3331 (void) unlink(temp_path
);
3333 return log_link_error_errno(link
, r
, "Failed to save link data to %s: %m", link
->state_file
);
3336 /* The serialized state in /run is no longer up-to-date. */
3337 void link_dirty(Link
*link
) {
3342 /* mark manager dirty as link is dirty */
3343 manager_dirty(link
->manager
);
3345 r
= set_ensure_allocated(&link
->manager
->dirty_links
, NULL
);
3347 /* allocation errors are ignored */
3350 r
= set_put(link
->manager
->dirty_links
, link
);
3352 /* don't take another ref if the link was already dirty */
3358 /* The serialized state in /run is up-to-date */
3359 void link_clean(Link
*link
) {
3361 assert(link
->manager
);
3363 set_remove(link
->manager
->dirty_links
, link
);
3367 static const char* const link_state_table
[_LINK_STATE_MAX
] = {
3368 [LINK_STATE_PENDING
] = "pending",
3369 [LINK_STATE_ENSLAVING
] = "configuring",
3370 [LINK_STATE_SETTING_ADDRESSES
] = "configuring",
3371 [LINK_STATE_SETTING_ROUTES
] = "configuring",
3372 [LINK_STATE_CONFIGURED
] = "configured",
3373 [LINK_STATE_UNMANAGED
] = "unmanaged",
3374 [LINK_STATE_FAILED
] = "failed",
3375 [LINK_STATE_LINGER
] = "linger",
3378 DEFINE_STRING_TABLE_LOOKUP(link_state
, LinkState
);
3380 static const char* const link_operstate_table
[_LINK_OPERSTATE_MAX
] = {
3381 [LINK_OPERSTATE_OFF
] = "off",
3382 [LINK_OPERSTATE_NO_CARRIER
] = "no-carrier",
3383 [LINK_OPERSTATE_DORMANT
] = "dormant",
3384 [LINK_OPERSTATE_CARRIER
] = "carrier",
3385 [LINK_OPERSTATE_DEGRADED
] = "degraded",
3386 [LINK_OPERSTATE_ROUTABLE
] = "routable",
3389 DEFINE_STRING_TABLE_LOOKUP(link_operstate
, LinkOperationalState
);