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"
32 #include "networkd-lldp-tx.h"
34 #include "socket-util.h"
35 #include "stdio-util.h"
36 #include "string-table.h"
37 #include "udev-util.h"
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 return link
->network
->link_local
& ADDRESS_FAMILY_IPV4
;
92 static bool link_ipv6ll_enabled(Link
*link
) {
95 if (!socket_ipv6_is_supported())
98 if (link
->flags
& IFF_LOOPBACK
)
104 return link
->network
->link_local
& ADDRESS_FAMILY_IPV6
;
107 static bool link_ipv6_enabled(Link
*link
) {
110 if (!socket_ipv6_is_supported())
113 if (link
->network
->bridge
)
116 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
117 return link_ipv6ll_enabled(link
) || network_has_static_ipv6_addresses(link
->network
);
120 static bool link_lldp_rx_enabled(Link
*link
) {
123 if (link
->flags
& IFF_LOOPBACK
)
126 if (link
->iftype
!= ARPHRD_ETHER
)
132 if (link
->network
->bridge
)
135 return link
->network
->lldp_mode
!= LLDP_MODE_NO
;
138 static bool link_lldp_emit_enabled(Link
*link
) {
141 if (link
->flags
& IFF_LOOPBACK
)
144 if (link
->iftype
!= ARPHRD_ETHER
)
150 return link
->network
->lldp_emit
!= LLDP_EMIT_NO
;
153 static bool link_ipv4_forward_enabled(Link
*link
) {
156 if (link
->flags
& IFF_LOOPBACK
)
162 if (link
->network
->ip_forward
== _ADDRESS_FAMILY_BOOLEAN_INVALID
)
165 return link
->network
->ip_forward
& ADDRESS_FAMILY_IPV4
;
168 static bool link_ipv6_forward_enabled(Link
*link
) {
171 if (!socket_ipv6_is_supported())
174 if (link
->flags
& IFF_LOOPBACK
)
180 if (link
->network
->ip_forward
== _ADDRESS_FAMILY_BOOLEAN_INVALID
)
183 return link
->network
->ip_forward
& ADDRESS_FAMILY_IPV6
;
186 static bool link_proxy_arp_enabled(Link
*link
) {
189 if (link
->flags
& IFF_LOOPBACK
)
195 if (link
->network
->proxy_arp
< 0)
201 static bool link_ipv6_accept_ra_enabled(Link
*link
) {
204 if (!socket_ipv6_is_supported())
207 if (link
->flags
& IFF_LOOPBACK
)
213 /* If unset use system default (enabled if local forwarding is disabled.
214 * disabled if local forwarding is enabled).
215 * If set, ignore or enforce RA independent of local forwarding state.
217 if (link
->network
->ipv6_accept_ra
< 0)
218 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
219 return !link_ipv6_forward_enabled(link
);
220 else if (link
->network
->ipv6_accept_ra
> 0)
221 /* accept RA even if ip_forward is enabled */
228 static IPv6PrivacyExtensions
link_ipv6_privacy_extensions(Link
*link
) {
231 if (!socket_ipv6_is_supported())
232 return _IPV6_PRIVACY_EXTENSIONS_INVALID
;
234 if (link
->flags
& IFF_LOOPBACK
)
235 return _IPV6_PRIVACY_EXTENSIONS_INVALID
;
238 return _IPV6_PRIVACY_EXTENSIONS_INVALID
;
240 return link
->network
->ipv6_privacy_extensions
;
243 static int link_enable_ipv6(Link
*link
) {
244 const char *p
= NULL
;
248 if (link
->flags
& IFF_LOOPBACK
)
251 disabled
= !link_ipv6_enabled(link
);
253 p
= strjoina("/proc/sys/net/ipv6/conf/", link
->ifname
, "/disable_ipv6");
255 r
= write_string_file(p
, one_zero(disabled
), WRITE_STRING_FILE_VERIFY_ON_FAILURE
);
257 log_link_warning_errno(link
, r
, "Cannot %s IPv6 for interface %s: %m", disabled
? "disable" : "enable", link
->ifname
);
260 log_link_info(link
, "IPv6 disabled for interface: %m");
262 log_link_info(link
, "IPv6 enabled for interface: %m");
268 void link_update_operstate(Link
*link
) {
269 LinkOperationalState operstate
;
272 if (link
->kernel_operstate
== IF_OPER_DORMANT
)
273 operstate
= LINK_OPERSTATE_DORMANT
;
274 else if (link_has_carrier(link
)) {
276 uint8_t scope
= RT_SCOPE_NOWHERE
;
279 /* if we have carrier, check what addresses we have */
280 SET_FOREACH(address
, link
->addresses
, i
) {
281 if (!address_is_ready(address
))
284 if (address
->scope
< scope
)
285 scope
= address
->scope
;
288 /* for operstate we also take foreign addresses into account */
289 SET_FOREACH(address
, link
->addresses_foreign
, i
) {
290 if (!address_is_ready(address
))
293 if (address
->scope
< scope
)
294 scope
= address
->scope
;
297 if (scope
< RT_SCOPE_SITE
)
298 /* universally accessible addresses found */
299 operstate
= LINK_OPERSTATE_ROUTABLE
;
300 else if (scope
< RT_SCOPE_HOST
)
301 /* only link or site local addresses found */
302 operstate
= LINK_OPERSTATE_DEGRADED
;
304 /* no useful addresses found */
305 operstate
= LINK_OPERSTATE_CARRIER
;
306 } else if (link
->flags
& IFF_UP
)
307 operstate
= LINK_OPERSTATE_NO_CARRIER
;
309 operstate
= LINK_OPERSTATE_OFF
;
311 if (link
->operstate
!= operstate
) {
312 link
->operstate
= operstate
;
313 link_send_changed(link
, "OperationalState", NULL
);
318 #define FLAG_STRING(string, flag, old, new) \
319 (((old ^ new) & flag) \
320 ? ((old & flag) ? (" -" string) : (" +" string)) \
323 static int link_update_flags(Link
*link
, sd_netlink_message
*m
) {
324 unsigned flags
, unknown_flags_added
, unknown_flags_removed
, unknown_flags
;
330 r
= sd_rtnl_message_link_get_flags(m
, &flags
);
332 return log_link_warning_errno(link
, r
, "Could not get link flags: %m");
334 r
= sd_netlink_message_read_u8(m
, IFLA_OPERSTATE
, &operstate
);
336 /* if we got a message without operstate, take it to mean
337 the state was unchanged */
338 operstate
= link
->kernel_operstate
;
340 if ((link
->flags
== flags
) && (link
->kernel_operstate
== operstate
))
343 if (link
->flags
!= flags
) {
344 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",
345 FLAG_STRING("LOOPBACK", IFF_LOOPBACK
, link
->flags
, flags
),
346 FLAG_STRING("MASTER", IFF_MASTER
, link
->flags
, flags
),
347 FLAG_STRING("SLAVE", IFF_SLAVE
, link
->flags
, flags
),
348 FLAG_STRING("UP", IFF_UP
, link
->flags
, flags
),
349 FLAG_STRING("DORMANT", IFF_DORMANT
, link
->flags
, flags
),
350 FLAG_STRING("LOWER_UP", IFF_LOWER_UP
, link
->flags
, flags
),
351 FLAG_STRING("RUNNING", IFF_RUNNING
, link
->flags
, flags
),
352 FLAG_STRING("MULTICAST", IFF_MULTICAST
, link
->flags
, flags
),
353 FLAG_STRING("BROADCAST", IFF_BROADCAST
, link
->flags
, flags
),
354 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT
, link
->flags
, flags
),
355 FLAG_STRING("PROMISC", IFF_PROMISC
, link
->flags
, flags
),
356 FLAG_STRING("ALLMULTI", IFF_ALLMULTI
, link
->flags
, flags
),
357 FLAG_STRING("PORTSEL", IFF_PORTSEL
, link
->flags
, flags
),
358 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA
, link
->flags
, flags
),
359 FLAG_STRING("DYNAMIC", IFF_DYNAMIC
, link
->flags
, flags
),
360 FLAG_STRING("NOARP", IFF_NOARP
, link
->flags
, flags
),
361 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS
, link
->flags
, flags
),
362 FLAG_STRING("DEBUG", IFF_DEBUG
, link
->flags
, flags
),
363 FLAG_STRING("ECHO", IFF_ECHO
, link
->flags
, flags
));
365 unknown_flags
= ~(IFF_LOOPBACK
| IFF_MASTER
| IFF_SLAVE
| IFF_UP
|
366 IFF_DORMANT
| IFF_LOWER_UP
| IFF_RUNNING
|
367 IFF_MULTICAST
| IFF_BROADCAST
| IFF_POINTOPOINT
|
368 IFF_PROMISC
| IFF_ALLMULTI
| IFF_PORTSEL
|
369 IFF_AUTOMEDIA
| IFF_DYNAMIC
| IFF_NOARP
|
370 IFF_NOTRAILERS
| IFF_DEBUG
| IFF_ECHO
);
371 unknown_flags_added
= ((link
->flags
^ flags
) & flags
& unknown_flags
);
372 unknown_flags_removed
= ((link
->flags
^ flags
) & link
->flags
& unknown_flags
);
374 /* link flags are currently at most 18 bits, let's align to
376 if (unknown_flags_added
)
378 "Unknown link flags gained: %#.5x (ignoring)",
379 unknown_flags_added
);
381 if (unknown_flags_removed
)
383 "Unknown link flags lost: %#.5x (ignoring)",
384 unknown_flags_removed
);
388 link
->kernel_operstate
= operstate
;
390 link_update_operstate(link
);
395 static int link_new(Manager
*manager
, sd_netlink_message
*message
, Link
**ret
) {
396 _cleanup_link_unref_ Link
*link
= NULL
;
400 unsigned short iftype
;
406 r
= sd_netlink_message_get_type(message
, &type
);
409 else if (type
!= RTM_NEWLINK
)
412 r
= sd_rtnl_message_link_get_ifindex(message
, &ifindex
);
415 else if (ifindex
<= 0)
418 r
= sd_rtnl_message_link_get_type(message
, &iftype
);
422 r
= sd_netlink_message_read_string(message
, IFLA_IFNAME
, &ifname
);
426 link
= new0(Link
, 1);
431 link
->manager
= manager
;
432 link
->state
= LINK_STATE_PENDING
;
433 link
->rtnl_extended_attrs
= true;
434 link
->ifindex
= ifindex
;
435 link
->iftype
= iftype
;
436 link
->ifname
= strdup(ifname
);
440 r
= sd_netlink_message_read_ether_addr(message
, IFLA_ADDRESS
, &link
->mac
);
442 log_link_debug_errno(link
, r
, "MAC address not found for new device, continuing without");
444 if (asprintf(&link
->state_file
, "/run/systemd/netif/links/%d", link
->ifindex
) < 0)
447 if (asprintf(&link
->lease_file
, "/run/systemd/netif/leases/%d", link
->ifindex
) < 0)
450 if (asprintf(&link
->lldp_file
, "/run/systemd/netif/lldp/%d", link
->ifindex
) < 0)
453 r
= hashmap_ensure_allocated(&manager
->links
, NULL
);
457 r
= hashmap_put(manager
->links
, INT_TO_PTR(link
->ifindex
), link
);
461 r
= link_update_flags(link
, message
);
471 static void link_free(Link
*link
) {
479 while (!set_isempty(link
->addresses
))
480 address_free(set_first(link
->addresses
));
482 while (!set_isempty(link
->addresses_foreign
))
483 address_free(set_first(link
->addresses_foreign
));
485 link
->addresses
= set_free(link
->addresses
);
487 link
->addresses_foreign
= set_free(link
->addresses_foreign
);
489 while ((address
= link
->pool_addresses
)) {
490 LIST_REMOVE(addresses
, link
->pool_addresses
, address
);
491 address_free(address
);
494 sd_dhcp_server_unref(link
->dhcp_server
);
495 sd_dhcp_client_unref(link
->dhcp_client
);
496 sd_dhcp_lease_unref(link
->dhcp_lease
);
498 link_lldp_emit_stop(link
);
500 free(link
->lease_file
);
502 sd_lldp_unref(link
->lldp
);
503 free(link
->lldp_file
);
505 sd_ipv4ll_unref(link
->ipv4ll
);
506 sd_dhcp6_client_unref(link
->dhcp6_client
);
507 sd_ndisc_unref(link
->ndisc_router_discovery
);
510 hashmap_remove(link
->manager
->links
, INT_TO_PTR(link
->ifindex
));
514 (void)unlink(link
->state_file
);
515 free(link
->state_file
);
517 udev_device_unref(link
->udev_device
);
519 HASHMAP_FOREACH (carrier
, link
->bound_to_links
, i
)
520 hashmap_remove(link
->bound_to_links
, INT_TO_PTR(carrier
->ifindex
));
521 hashmap_free(link
->bound_to_links
);
523 HASHMAP_FOREACH (carrier
, link
->bound_by_links
, i
)
524 hashmap_remove(link
->bound_by_links
, INT_TO_PTR(carrier
->ifindex
));
525 hashmap_free(link
->bound_by_links
);
530 Link
*link_unref(Link
*link
) {
534 assert(link
->n_ref
> 0);
546 Link
*link_ref(Link
*link
) {
550 assert(link
->n_ref
> 0);
557 int link_get(Manager
*m
, int ifindex
, Link
**ret
) {
564 link
= hashmap_get(m
->links
, INT_TO_PTR(ifindex
));
573 static void link_set_state(Link
*link
, LinkState state
) {
576 if (link
->state
== state
)
581 link_send_changed(link
, "AdministrativeState", NULL
);
584 static void link_enter_unmanaged(Link
*link
) {
587 log_link_debug(link
, "Unmanaged");
589 link_set_state(link
, LINK_STATE_UNMANAGED
);
594 static int link_stop_clients(Link
*link
) {
598 assert(link
->manager
);
599 assert(link
->manager
->event
);
601 if (link
->dhcp_client
) {
602 k
= sd_dhcp_client_stop(link
->dhcp_client
);
604 r
= log_link_warning_errno(link
, k
, "Could not stop DHCPv4 client: %m");
608 k
= sd_ipv4ll_stop(link
->ipv4ll
);
610 r
= log_link_warning_errno(link
, k
, "Could not stop IPv4 link-local: %m");
613 if (link
->dhcp6_client
) {
614 k
= sd_dhcp6_client_stop(link
->dhcp6_client
);
616 r
= log_link_warning_errno(link
, k
, "Could not stop DHCPv6 client: %m");
619 if (link
->ndisc_router_discovery
) {
620 k
= sd_ndisc_stop(link
->ndisc_router_discovery
);
622 r
= log_link_warning_errno(link
, k
, "Could not stop IPv6 Router Discovery: %m");
625 link_lldp_emit_stop(link
);
629 void link_enter_failed(Link
*link
) {
632 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
635 log_link_warning(link
, "Failed");
637 link_set_state(link
, LINK_STATE_FAILED
);
639 link_stop_clients(link
);
644 static Address
* link_find_dhcp_server_address(Link
*link
) {
648 assert(link
->network
);
650 /* The first statically configured address if there is any */
651 LIST_FOREACH(addresses
, address
, link
->network
->static_addresses
) {
653 if (address
->family
!= AF_INET
)
656 if (in_addr_is_null(address
->family
, &address
->in_addr
))
662 /* If that didn't work, find a suitable address we got from the pool */
663 LIST_FOREACH(addresses
, address
, link
->pool_addresses
) {
664 if (address
->family
!= AF_INET
)
673 static int link_enter_configured(Link
*link
) {
675 assert(link
->network
);
676 assert(link
->state
== LINK_STATE_SETTING_ROUTES
);
678 log_link_info(link
, "Configured");
680 link_set_state(link
, LINK_STATE_CONFIGURED
);
687 void link_check_ready(Link
*link
) {
693 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
699 if (!link
->static_configured
)
702 if (link_ipv4ll_enabled(link
))
703 if (!link
->ipv4ll_address
||
707 if (link_ipv6ll_enabled(link
))
708 if (in_addr_is_null(AF_INET6
, (const union in_addr_union
*) &link
->ipv6ll_address
) > 0)
711 if ((link_dhcp4_enabled(link
) && !link_dhcp6_enabled(link
) &&
712 !link
->dhcp4_configured
) ||
713 (link_dhcp6_enabled(link
) && !link_dhcp4_enabled(link
) &&
714 !link
->dhcp6_configured
) ||
715 (link_dhcp4_enabled(link
) && link_dhcp6_enabled(link
) &&
716 !link
->dhcp4_configured
&& !link
->dhcp6_configured
))
719 if (link_ipv6_accept_ra_enabled(link
) && !link
->ndisc_configured
)
722 SET_FOREACH(a
, link
->addresses
, i
)
723 if (!address_is_ready(a
))
726 if (link
->state
!= LINK_STATE_CONFIGURED
)
727 link_enter_configured(link
);
732 static int route_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
733 _cleanup_link_unref_ Link
*link
= userdata
;
736 assert(link
->link_messages
> 0);
737 assert(IN_SET(link
->state
, LINK_STATE_SETTING_ADDRESSES
,
738 LINK_STATE_SETTING_ROUTES
, LINK_STATE_FAILED
,
741 link
->link_messages
--;
743 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
746 r
= sd_netlink_message_get_errno(m
);
747 if (r
< 0 && r
!= -EEXIST
)
748 log_link_warning_errno(link
, r
, "Could not set route: %m");
750 if (link
->link_messages
== 0) {
751 log_link_debug(link
, "Routes set");
752 link
->static_configured
= true;
753 link_check_ready(link
);
759 static int link_enter_set_routes(Link
*link
) {
764 assert(link
->network
);
765 assert(link
->state
== LINK_STATE_SETTING_ADDRESSES
);
767 link_set_state(link
, LINK_STATE_SETTING_ROUTES
);
769 LIST_FOREACH(routes
, rt
, link
->network
->static_routes
) {
770 r
= route_configure(rt
, link
, route_handler
);
772 log_link_warning_errno(link
, r
, "Could not set routes: %m");
773 link_enter_failed(link
);
777 link
->link_messages
++;
780 if (link
->link_messages
== 0) {
781 link
->static_configured
= true;
782 link_check_ready(link
);
784 log_link_debug(link
, "Setting routes");
789 int link_route_remove_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
790 _cleanup_link_unref_ Link
*link
= userdata
;
795 assert(link
->ifname
);
797 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
800 r
= sd_netlink_message_get_errno(m
);
801 if (r
< 0 && r
!= -ESRCH
)
802 log_link_warning_errno(link
, r
, "Could not drop route: %m");
807 static int address_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
808 _cleanup_link_unref_ Link
*link
= userdata
;
814 assert(link
->ifname
);
815 assert(link
->link_messages
> 0);
816 assert(IN_SET(link
->state
, LINK_STATE_SETTING_ADDRESSES
,
817 LINK_STATE_FAILED
, LINK_STATE_LINGER
));
819 link
->link_messages
--;
821 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
824 r
= sd_netlink_message_get_errno(m
);
825 if (r
< 0 && r
!= -EEXIST
)
826 log_link_warning_errno(link
, r
, "could not set address: %m");
828 manager_rtnl_process_address(rtnl
, m
, link
->manager
);
830 if (link
->link_messages
== 0) {
831 log_link_debug(link
, "Addresses set");
832 link_enter_set_routes(link
);
838 static int link_push_dns_to_dhcp_server(Link
*link
, sd_dhcp_server
*s
) {
839 _cleanup_free_
struct in_addr
*addresses
= NULL
;
840 size_t n_addresses
= 0, n_allocated
= 0;
843 log_debug("Copying DNS server information from %s", link
->ifname
);
848 STRV_FOREACH(a
, link
->network
->dns
) {
851 /* Only look for IPv4 addresses */
852 if (inet_pton(AF_INET
, *a
, &ia
) <= 0)
855 if (!GREEDY_REALLOC(addresses
, n_allocated
, n_addresses
+ 1))
858 addresses
[n_addresses
++] = ia
;
861 if (link
->network
->dhcp_use_dns
&&
863 const struct in_addr
*da
= NULL
;
866 n
= sd_dhcp_lease_get_dns(link
->dhcp_lease
, &da
);
869 if (!GREEDY_REALLOC(addresses
, n_allocated
, n_addresses
+ n
))
872 memcpy(addresses
+ n_addresses
, da
, n
* sizeof(struct in_addr
));
877 if (n_addresses
<= 0)
880 return sd_dhcp_server_set_dns(s
, addresses
, n_addresses
);
883 static int link_push_ntp_to_dhcp_server(Link
*link
, sd_dhcp_server
*s
) {
884 _cleanup_free_
struct in_addr
*addresses
= NULL
;
885 size_t n_addresses
= 0, n_allocated
= 0;
891 log_debug("Copying NTP server information from %s", link
->ifname
);
893 STRV_FOREACH(a
, link
->network
->ntp
) {
896 /* Only look for IPv4 addresses */
897 if (inet_pton(AF_INET
, *a
, &ia
) <= 0)
900 if (!GREEDY_REALLOC(addresses
, n_allocated
, n_addresses
+ 1))
903 addresses
[n_addresses
++] = ia
;
906 if (link
->network
->dhcp_use_ntp
&&
908 const struct in_addr
*da
= NULL
;
911 n
= sd_dhcp_lease_get_ntp(link
->dhcp_lease
, &da
);
914 if (!GREEDY_REALLOC(addresses
, n_allocated
, n_addresses
+ n
))
917 memcpy(addresses
+ n_addresses
, da
, n
* sizeof(struct in_addr
));
922 if (n_addresses
<= 0)
925 return sd_dhcp_server_set_ntp(s
, addresses
, n_addresses
);
928 static int link_enter_set_addresses(Link
*link
) {
933 assert(link
->network
);
934 assert(link
->state
!= _LINK_STATE_INVALID
);
936 link_set_state(link
, LINK_STATE_SETTING_ADDRESSES
);
938 LIST_FOREACH(addresses
, ad
, link
->network
->static_addresses
) {
939 r
= address_configure(ad
, link
, address_handler
, false);
941 log_link_warning_errno(link
, r
, "Could not set addresses: %m");
942 link_enter_failed(link
);
946 link
->link_messages
++;
949 /* now that we can figure out a default address for the dhcp server,
951 if (link_dhcp4_server_enabled(link
)) {
954 bool acquired_uplink
= false;
956 address
= link_find_dhcp_server_address(link
);
958 log_link_warning(link
, "Failed to find suitable address for DHCPv4 server instance.");
959 link_enter_failed(link
);
963 /* use the server address' subnet as the pool */
964 r
= sd_dhcp_server_configure_pool(link
->dhcp_server
, &address
->in_addr
.in
, address
->prefixlen
,
965 link
->network
->dhcp_server_pool_offset
, link
->network
->dhcp_server_pool_size
);
970 r = sd_dhcp_server_set_router(link->dhcp_server,
971 &main_address->in_addr.in);
976 if (link
->network
->dhcp_server_max_lease_time_usec
> 0) {
977 r
= sd_dhcp_server_set_max_lease_time(
979 DIV_ROUND_UP(link
->network
->dhcp_server_max_lease_time_usec
, USEC_PER_SEC
));
984 if (link
->network
->dhcp_server_default_lease_time_usec
> 0) {
985 r
= sd_dhcp_server_set_default_lease_time(
987 DIV_ROUND_UP(link
->network
->dhcp_server_default_lease_time_usec
, USEC_PER_SEC
));
992 if (link
->network
->dhcp_server_emit_dns
) {
994 if (link
->network
->n_dhcp_server_dns
> 0)
995 r
= sd_dhcp_server_set_dns(link
->dhcp_server
, link
->network
->dhcp_server_dns
, link
->network
->n_dhcp_server_dns
);
997 uplink
= manager_find_uplink(link
->manager
, link
);
998 acquired_uplink
= true;
1001 log_link_debug(link
, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1004 r
= link_push_dns_to_dhcp_server(uplink
, link
->dhcp_server
);
1007 log_link_warning_errno(link
, r
, "Failed to set DNS server for DHCP server, ignoring: %m");
1011 if (link
->network
->dhcp_server_emit_ntp
) {
1013 if (link
->network
->n_dhcp_server_ntp
> 0)
1014 r
= sd_dhcp_server_set_ntp(link
->dhcp_server
, link
->network
->dhcp_server_ntp
, link
->network
->n_dhcp_server_ntp
);
1016 if (!acquired_uplink
)
1017 uplink
= manager_find_uplink(link
->manager
, link
);
1020 log_link_debug(link
, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1023 r
= link_push_ntp_to_dhcp_server(uplink
, link
->dhcp_server
);
1027 log_link_warning_errno(link
, r
, "Failed to set NTP server for DHCP server, ignoring: %m");
1030 r
= sd_dhcp_server_set_emit_router(link
->dhcp_server
, link
->network
->dhcp_server_emit_router
);
1032 log_link_warning_errno(link
, r
, "Failed to set router emission for DHCP server: %m");
1036 if (link
->network
->dhcp_server_emit_timezone
) {
1037 _cleanup_free_
char *buffer
= NULL
;
1038 const char *tz
= NULL
;
1040 if (link
->network
->dhcp_server_timezone
)
1041 tz
= link
->network
->dhcp_server_timezone
;
1043 r
= get_timezone(&buffer
);
1045 log_warning_errno(r
, "Failed to determine timezone: %m");
1051 r
= sd_dhcp_server_set_timezone(link
->dhcp_server
, tz
);
1057 r
= sd_dhcp_server_start(link
->dhcp_server
);
1059 log_link_warning_errno(link
, r
, "Could not start DHCPv4 server instance: %m");
1061 link_enter_failed(link
);
1066 log_link_debug(link
, "Offering DHCPv4 leases");
1069 if (link
->link_messages
== 0)
1070 link_enter_set_routes(link
);
1072 log_link_debug(link
, "Setting addresses");
1077 int link_address_remove_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
1078 _cleanup_link_unref_ Link
*link
= userdata
;
1083 assert(link
->ifname
);
1085 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1088 r
= sd_netlink_message_get_errno(m
);
1089 if (r
< 0 && r
!= -EADDRNOTAVAIL
)
1090 log_link_warning_errno(link
, r
, "Could not drop address: %m");
1095 static int link_set_bridge_fdb(Link
*const link
) {
1096 FdbEntry
*fdb_entry
;
1099 LIST_FOREACH(static_fdb_entries
, fdb_entry
, link
->network
->static_fdb_entries
) {
1100 r
= fdb_entry_configure(link
, fdb_entry
);
1102 log_link_error_errno(link
, r
, "Failed to add MAC entry to static MAC table: %m");
1110 static int link_set_proxy_arp(Link
*const link
) {
1111 const char *p
= NULL
;
1114 if (!link_proxy_arp_enabled(link
))
1117 p
= strjoina("/proc/sys/net/ipv4/conf/", link
->ifname
, "/proxy_arp");
1119 r
= write_string_file(p
, one_zero(link
->network
->proxy_arp
), WRITE_STRING_FILE_VERIFY_ON_FAILURE
);
1121 log_link_warning_errno(link
, r
, "Cannot configure proxy ARP for interface: %m");
1126 static int link_set_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
1127 _cleanup_link_unref_ Link
*link
= userdata
;
1130 log_link_debug(link
, "Set link");
1132 r
= sd_netlink_message_get_errno(m
);
1133 if (r
< 0 && r
!= -EEXIST
) {
1134 log_link_error_errno(link
, r
, "Could not join netdev: %m");
1135 link_enter_failed(link
);
1142 static int set_hostname_handler(sd_bus_message
*m
, void *userdata
, sd_bus_error
*ret_error
) {
1143 _cleanup_link_unref_ Link
*link
= userdata
;
1144 const sd_bus_error
*e
;
1149 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1152 e
= sd_bus_message_get_error(m
);
1154 log_link_warning_errno(link
, sd_bus_error_get_errno(e
), "Could not set hostname: %s", e
->message
);
1159 int link_set_hostname(Link
*link
, const char *hostname
) {
1163 assert(link
->manager
);
1165 log_link_debug(link
, "Setting transient hostname: '%s'", strna(hostname
));
1167 if (!link
->manager
->bus
) {
1168 /* TODO: replace by assert when we can rely on kdbus */
1169 log_link_info(link
, "Not connected to system bus, ignoring transient hostname.");
1173 r
= sd_bus_call_method_async(
1176 "org.freedesktop.hostname1",
1177 "/org/freedesktop/hostname1",
1178 "org.freedesktop.hostname1",
1180 set_hostname_handler
,
1187 return log_link_error_errno(link
, r
, "Could not set transient hostname: %m");
1194 static int set_timezone_handler(sd_bus_message
*m
, void *userdata
, sd_bus_error
*ret_error
) {
1195 _cleanup_link_unref_ Link
*link
= userdata
;
1196 const sd_bus_error
*e
;
1201 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1204 e
= sd_bus_message_get_error(m
);
1206 log_link_warning_errno(link
, sd_bus_error_get_errno(e
), "Could not set timezone: %s", e
->message
);
1211 int link_set_timezone(Link
*link
, const char *tz
) {
1215 assert(link
->manager
);
1218 log_link_debug(link
, "Setting system timezone: '%s'", tz
);
1220 if (!link
->manager
->bus
) {
1221 log_link_info(link
, "Not connected to system bus, ignoring timezone.");
1225 r
= sd_bus_call_method_async(
1228 "org.freedesktop.timedate1",
1229 "/org/freedesktop/timedate1",
1230 "org.freedesktop.timedate1",
1232 set_timezone_handler
,
1238 return log_link_error_errno(link
, r
, "Could not set timezone: %m");
1245 static int set_mtu_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
1246 _cleanup_link_unref_ Link
*link
= userdata
;
1251 assert(link
->ifname
);
1253 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1256 r
= sd_netlink_message_get_errno(m
);
1258 log_link_warning_errno(link
, r
, "Could not set MTU: %m");
1263 int link_set_mtu(Link
*link
, uint32_t mtu
) {
1264 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1268 assert(link
->manager
);
1269 assert(link
->manager
->rtnl
);
1271 log_link_debug(link
, "Setting MTU: %" PRIu32
, mtu
);
1273 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1275 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1277 r
= sd_netlink_message_append_u32(req
, IFLA_MTU
, mtu
);
1279 return log_link_error_errno(link
, r
, "Could not append MTU: %m");
1281 r
= sd_netlink_call_async(link
->manager
->rtnl
, req
, set_mtu_handler
, link
, 0, NULL
);
1283 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1290 static int link_set_bridge(Link
*link
) {
1291 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1295 assert(link
->network
);
1297 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1299 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1301 r
= sd_rtnl_message_link_set_family(req
, PF_BRIDGE
);
1303 return log_link_error_errno(link
, r
, "Could not set message family: %m");
1305 r
= sd_netlink_message_open_container(req
, IFLA_PROTINFO
);
1307 return log_link_error_errno(link
, r
, "Could not append IFLA_PROTINFO attribute: %m");
1309 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_GUARD
, !link
->network
->use_bpdu
);
1311 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1313 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_MODE
, link
->network
->hairpin
);
1315 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_MODE attribute: %m");
1317 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_FAST_LEAVE
, link
->network
->fast_leave
);
1319 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1321 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_PROTECT
, !link
->network
->allow_port_to_be_root
);
1323 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
1325 r
= sd_netlink_message_append_u8(req
, IFLA_BRPORT_UNICAST_FLOOD
, link
->network
->unicast_flood
);
1327 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
1329 if (link
->network
->cost
!= 0) {
1330 r
= sd_netlink_message_append_u32(req
, IFLA_BRPORT_COST
, link
->network
->cost
);
1332 return log_link_error_errno(link
, r
, "Could not append IFLA_BRPORT_COST attribute: %m");
1335 r
= sd_netlink_message_close_container(req
);
1337 return log_link_error_errno(link
, r
, "Could not append IFLA_LINKINFO attribute: %m");
1339 r
= sd_netlink_call_async(link
->manager
->rtnl
, req
, link_set_handler
, link
, 0, NULL
);
1341 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1348 static int link_lldp_save(Link
*link
) {
1349 _cleanup_free_
char *temp_path
= NULL
;
1350 _cleanup_fclose_
FILE *f
= NULL
;
1351 sd_lldp_neighbor
**l
= NULL
;
1355 assert(link
->lldp_file
);
1358 (void) unlink(link
->lldp_file
);
1362 r
= sd_lldp_get_neighbors(link
->lldp
, &l
);
1366 (void) unlink(link
->lldp_file
);
1372 r
= fopen_temporary(link
->lldp_file
, &f
, &temp_path
);
1376 fchmod(fileno(f
), 0644);
1378 for (i
= 0; i
< n
; i
++) {
1383 r
= sd_lldp_neighbor_get_raw(l
[i
], &p
, &sz
);
1388 (void) fwrite(&u
, 1, sizeof(u
), f
);
1389 (void) fwrite(p
, 1, sz
, f
);
1392 r
= fflush_and_check(f
);
1396 if (rename(temp_path
, link
->lldp_file
) < 0) {
1403 (void) unlink(link
->lldp_file
);
1405 (void) unlink(temp_path
);
1407 log_link_error_errno(link
, r
, "Failed to save LLDP data to %s: %m", link
->lldp_file
);
1411 for (i
= 0; i
< n
; i
++)
1412 sd_lldp_neighbor_unref(l
[i
]);
1419 static void lldp_handler(sd_lldp
*lldp
, sd_lldp_event event
, sd_lldp_neighbor
*n
, void *userdata
) {
1420 Link
*link
= userdata
;
1425 (void) link_lldp_save(link
);
1427 if (link_lldp_emit_enabled(link
) && event
== SD_LLDP_EVENT_ADDED
) {
1428 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1430 log_link_debug(link
, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1432 r
= link_lldp_emit_start(link
);
1434 log_link_warning_errno(link
, r
, "Failed to restart LLDP transmission: %m");
1438 static int link_acquire_ipv6_conf(Link
*link
) {
1443 if (link_dhcp6_enabled(link
)) {
1444 assert(link
->dhcp6_client
);
1445 assert(in_addr_is_link_local(AF_INET6
, (const union in_addr_union
*)&link
->ipv6ll_address
) > 0);
1447 /* start DHCPv6 client in stateless mode */
1448 r
= dhcp6_request_address(link
, true);
1449 if (r
< 0 && r
!= -EBUSY
)
1450 return log_link_warning_errno(link
, r
, "Could not acquire DHCPv6 lease: %m");
1452 log_link_debug(link
, "Acquiring DHCPv6 lease");
1455 if (link_ipv6_accept_ra_enabled(link
)) {
1456 assert(link
->ndisc_router_discovery
);
1458 log_link_debug(link
, "Discovering IPv6 routers");
1460 r
= sd_ndisc_router_discovery_start(link
->ndisc_router_discovery
);
1461 if (r
< 0 && r
!= -EBUSY
)
1462 return log_link_warning_errno(link
, r
, "Could not start IPv6 Router Discovery: %m");
1468 static int link_acquire_ipv4_conf(Link
*link
) {
1472 assert(link
->network
);
1473 assert(link
->manager
);
1474 assert(link
->manager
->event
);
1476 if (link_ipv4ll_enabled(link
)) {
1477 assert(link
->ipv4ll
);
1479 log_link_debug(link
, "Acquiring IPv4 link-local address");
1481 r
= sd_ipv4ll_start(link
->ipv4ll
);
1483 return log_link_warning_errno(link
, r
, "Could not acquire IPv4 link-local address: %m");
1486 if (link_dhcp4_enabled(link
)) {
1487 assert(link
->dhcp_client
);
1489 log_link_debug(link
, "Acquiring DHCPv4 lease");
1491 r
= sd_dhcp_client_start(link
->dhcp_client
);
1493 return log_link_warning_errno(link
, r
, "Could not acquire DHCPv4 lease: %m");
1499 static int link_acquire_conf(Link
*link
) {
1504 r
= link_acquire_ipv4_conf(link
);
1508 if (in_addr_is_null(AF_INET6
, (const union in_addr_union
*) &link
->ipv6ll_address
) == 0) {
1509 r
= link_acquire_ipv6_conf(link
);
1514 if (link_lldp_emit_enabled(link
)) {
1515 r
= link_lldp_emit_start(link
);
1517 return log_link_warning_errno(link
, r
, "Failed to start LLDP transmission: %m");
1523 bool link_has_carrier(Link
*link
) {
1524 /* see Documentation/networking/operstates.txt in the kernel sources */
1526 if (link
->kernel_operstate
== IF_OPER_UP
)
1529 if (link
->kernel_operstate
== IF_OPER_UNKNOWN
)
1530 /* operstate may not be implemented, so fall back to flags */
1531 if ((link
->flags
& IFF_LOWER_UP
) && !(link
->flags
& IFF_DORMANT
))
1537 static int link_up_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
1538 _cleanup_link_unref_ Link
*link
= userdata
;
1543 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1546 r
= sd_netlink_message_get_errno(m
);
1548 /* we warn but don't fail the link, as it may be
1550 log_link_warning_errno(link
, r
, "Could not bring up interface: %m");
1555 static int link_up(Link
*link
) {
1556 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1557 uint8_t ipv6ll_mode
;
1561 assert(link
->network
);
1562 assert(link
->manager
);
1563 assert(link
->manager
->rtnl
);
1565 log_link_debug(link
, "Bringing link up");
1567 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
1569 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1571 /* set it free if not enslaved with networkd */
1572 if (!link
->network
->bridge
&& !link
->network
->bond
) {
1573 r
= sd_netlink_message_append_u32(req
, IFLA_MASTER
, 0);
1575 return log_link_error_errno(link
, r
, "Could not append IFLA_MASTER attribute: %m");
1578 r
= sd_rtnl_message_link_set_flags(req
, IFF_UP
, IFF_UP
);
1580 return log_link_error_errno(link
, r
, "Could not set link flags: %m");
1582 if (link
->network
->mac
) {
1583 r
= sd_netlink_message_append_ether_addr(req
, IFLA_ADDRESS
, link
->network
->mac
);
1585 return log_link_error_errno(link
, r
, "Could not set MAC address: %m");
1588 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
1589 for this interface, or if it is a bridge slave, then disable IPv6 else enable it. */
1590 (void) link_enable_ipv6(link
);
1592 if (link
->network
->mtu
) {
1593 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
1594 on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1595 if (link_ipv6_enabled(link
) && link
->network
->mtu
< IPV6_MIN_MTU
) {
1597 log_link_warning(link
, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU
) ", as "
1598 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU
) " bytes: %m");
1600 link
->network
->mtu
= IPV6_MIN_MTU
;
1603 r
= sd_netlink_message_append_u32(req
, IFLA_MTU
, link
->network
->mtu
);
1605 return log_link_error_errno(link
, r
, "Could not set MTU: %m");
1608 r
= sd_netlink_message_open_container(req
, IFLA_AF_SPEC
);
1610 return log_link_error_errno(link
, r
, "Could not open IFLA_AF_SPEC container: %m");
1612 if (link_ipv6_enabled(link
)) {
1613 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1614 r
= sd_netlink_message_open_container(req
, AF_INET6
);
1616 return log_link_error_errno(link
, r
, "Could not open AF_INET6 container: %m");
1618 if (!link_ipv6ll_enabled(link
))
1619 ipv6ll_mode
= IN6_ADDR_GEN_MODE_NONE
;
1621 const char *p
= NULL
;
1622 _cleanup_free_
char *stable_secret
= NULL
;
1624 p
= strjoina("/proc/sys/net/ipv6/conf/", link
->ifname
, "/stable_secret");
1625 r
= read_one_line_file(p
, &stable_secret
);
1628 ipv6ll_mode
= IN6_ADDR_GEN_MODE_EUI64
;
1630 ipv6ll_mode
= IN6_ADDR_GEN_MODE_STABLE_PRIVACY
;
1632 r
= sd_netlink_message_append_u8(req
, IFLA_INET6_ADDR_GEN_MODE
, ipv6ll_mode
);
1634 return log_link_error_errno(link
, r
, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1636 if (!in_addr_is_null(AF_INET6
, &link
->network
->ipv6_token
)) {
1637 r
= sd_netlink_message_append_in6_addr(req
, IFLA_INET6_TOKEN
, &link
->network
->ipv6_token
.in6
);
1639 return log_link_error_errno(link
, r
, "Could not append IFLA_INET6_TOKEN: %m");
1642 r
= sd_netlink_message_close_container(req
);
1644 return log_link_error_errno(link
, r
, "Could not close AF_INET6 container: %m");
1647 r
= sd_netlink_message_close_container(req
);
1649 return log_link_error_errno(link
, r
, "Could not close IFLA_AF_SPEC container: %m");
1651 r
= sd_netlink_call_async(link
->manager
->rtnl
, req
, link_up_handler
, link
, 0, NULL
);
1653 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1660 static int link_down_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
1661 _cleanup_link_unref_ Link
*link
= userdata
;
1666 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1669 r
= sd_netlink_message_get_errno(m
);
1671 log_link_warning_errno(link
, r
, "Could not bring down interface: %m");
1676 static int link_down(Link
*link
) {
1677 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
1681 assert(link
->manager
);
1682 assert(link
->manager
->rtnl
);
1684 log_link_debug(link
, "Bringing link down");
1686 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
,
1687 RTM_SETLINK
, link
->ifindex
);
1689 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
1691 r
= sd_rtnl_message_link_set_flags(req
, 0, IFF_UP
);
1693 return log_link_error_errno(link
, r
, "Could not set link flags: %m");
1695 r
= sd_netlink_call_async(link
->manager
->rtnl
, req
, link_down_handler
, link
, 0, NULL
);
1697 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
1704 static int link_handle_bound_to_list(Link
*link
) {
1708 bool required_up
= false;
1709 bool link_is_up
= false;
1713 if (hashmap_isempty(link
->bound_to_links
))
1716 if (link
->flags
& IFF_UP
)
1719 HASHMAP_FOREACH (l
, link
->bound_to_links
, i
)
1720 if (link_has_carrier(l
)) {
1725 if (!required_up
&& link_is_up
) {
1726 r
= link_down(link
);
1729 } else if (required_up
&& !link_is_up
) {
1738 static int link_handle_bound_by_list(Link
*link
) {
1745 if (hashmap_isempty(link
->bound_by_links
))
1748 HASHMAP_FOREACH (l
, link
->bound_by_links
, i
) {
1749 r
= link_handle_bound_to_list(l
);
1757 static int link_put_carrier(Link
*link
, Link
*carrier
, Hashmap
**h
) {
1763 if (link
== carrier
)
1766 if (hashmap_get(*h
, INT_TO_PTR(carrier
->ifindex
)))
1769 r
= hashmap_ensure_allocated(h
, NULL
);
1773 r
= hashmap_put(*h
, INT_TO_PTR(carrier
->ifindex
), carrier
);
1780 static int link_new_bound_by_list(Link
*link
) {
1785 bool list_updated
= false;
1788 assert(link
->manager
);
1792 HASHMAP_FOREACH(carrier
, m
->links
, i
) {
1793 if (!carrier
->network
)
1796 if (strv_isempty(carrier
->network
->bind_carrier
))
1799 if (strv_fnmatch(carrier
->network
->bind_carrier
, link
->ifname
, 0)) {
1800 r
= link_put_carrier(link
, carrier
, &link
->bound_by_links
);
1804 list_updated
= true;
1811 HASHMAP_FOREACH(carrier
, link
->bound_by_links
, i
) {
1812 r
= link_put_carrier(carrier
, link
, &carrier
->bound_to_links
);
1816 link_dirty(carrier
);
1822 static int link_new_bound_to_list(Link
*link
) {
1827 bool list_updated
= false;
1830 assert(link
->manager
);
1835 if (strv_isempty(link
->network
->bind_carrier
))
1840 HASHMAP_FOREACH (carrier
, m
->links
, i
) {
1841 if (strv_fnmatch(link
->network
->bind_carrier
, carrier
->ifname
, 0)) {
1842 r
= link_put_carrier(link
, carrier
, &link
->bound_to_links
);
1846 list_updated
= true;
1853 HASHMAP_FOREACH (carrier
, link
->bound_to_links
, i
) {
1854 r
= link_put_carrier(carrier
, link
, &carrier
->bound_by_links
);
1858 link_dirty(carrier
);
1864 static int link_new_carrier_maps(Link
*link
) {
1867 r
= link_new_bound_by_list(link
);
1871 r
= link_handle_bound_by_list(link
);
1875 r
= link_new_bound_to_list(link
);
1879 r
= link_handle_bound_to_list(link
);
1886 static void link_free_bound_to_list(Link
*link
) {
1890 HASHMAP_FOREACH (bound_to
, link
->bound_to_links
, i
) {
1891 hashmap_remove(link
->bound_to_links
, INT_TO_PTR(bound_to
->ifindex
));
1893 if (hashmap_remove(bound_to
->bound_by_links
, INT_TO_PTR(link
->ifindex
)))
1894 link_dirty(bound_to
);
1900 static void link_free_bound_by_list(Link
*link
) {
1904 HASHMAP_FOREACH (bound_by
, link
->bound_by_links
, i
) {
1905 hashmap_remove(link
->bound_by_links
, INT_TO_PTR(bound_by
->ifindex
));
1907 if (hashmap_remove(bound_by
->bound_to_links
, INT_TO_PTR(link
->ifindex
))) {
1908 link_dirty(bound_by
);
1909 link_handle_bound_to_list(bound_by
);
1916 static void link_free_carrier_maps(Link
*link
) {
1917 bool list_updated
= false;
1921 if (!hashmap_isempty(link
->bound_to_links
)) {
1922 link_free_bound_to_list(link
);
1923 list_updated
= true;
1926 if (!hashmap_isempty(link
->bound_by_links
)) {
1927 link_free_bound_by_list(link
);
1928 list_updated
= true;
1937 void link_drop(Link
*link
) {
1938 if (!link
|| link
->state
== LINK_STATE_LINGER
)
1941 link_set_state(link
, LINK_STATE_LINGER
);
1943 link_free_carrier_maps(link
);
1945 log_link_debug(link
, "Link removed");
1947 (void)unlink(link
->state_file
);
1953 static int link_joined(Link
*link
) {
1957 assert(link
->network
);
1959 if (!hashmap_isempty(link
->bound_to_links
)) {
1960 r
= link_handle_bound_to_list(link
);
1963 } else if (!(link
->flags
& IFF_UP
)) {
1966 link_enter_failed(link
);
1971 if (link
->network
->bridge
) {
1972 r
= link_set_bridge(link
);
1974 log_link_error_errno(link
, r
, "Could not set bridge message: %m");
1977 return link_enter_set_addresses(link
);
1980 static int netdev_join_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
1981 _cleanup_link_unref_ Link
*link
= userdata
;
1985 assert(link
->network
);
1989 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1992 r
= sd_netlink_message_get_errno(m
);
1993 if (r
< 0 && r
!= -EEXIST
) {
1994 log_link_error_errno(link
, r
, "Could not join netdev: %m");
1995 link_enter_failed(link
);
1998 log_link_debug(link
, "Joined netdev");
2000 if (link
->enslaving
<= 0)
2006 static int link_enter_join_netdev(Link
*link
) {
2012 assert(link
->network
);
2013 assert(link
->state
== LINK_STATE_PENDING
);
2015 link_set_state(link
, LINK_STATE_ENSLAVING
);
2019 if (!link
->network
->bridge
&&
2020 !link
->network
->bond
&&
2021 hashmap_isempty(link
->network
->stacked_netdevs
))
2022 return link_joined(link
);
2024 if (link
->network
->bond
) {
2025 log_struct(LOG_DEBUG
,
2026 LOG_LINK_INTERFACE(link
),
2027 LOG_NETDEV_INTERFACE(link
->network
->bond
),
2028 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", link
->network
->bond
->ifname
),
2031 r
= netdev_join(link
->network
->bond
, link
, netdev_join_handler
);
2033 log_struct_errno(LOG_WARNING
, r
,
2034 LOG_LINK_INTERFACE(link
),
2035 LOG_NETDEV_INTERFACE(link
->network
->bond
),
2036 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", link
->network
->bond
->ifname
),
2039 link_enter_failed(link
);
2046 if (link
->network
->bridge
) {
2047 log_struct(LOG_DEBUG
,
2048 LOG_LINK_INTERFACE(link
),
2049 LOG_NETDEV_INTERFACE(link
->network
->bridge
),
2050 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", link
->network
->bridge
->ifname
),
2053 r
= netdev_join(link
->network
->bridge
, link
, netdev_join_handler
);
2055 log_struct_errno(LOG_WARNING
, r
,
2056 LOG_LINK_INTERFACE(link
),
2057 LOG_NETDEV_INTERFACE(link
->network
->bridge
),
2058 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", link
->network
->bridge
->ifname
),
2060 link_enter_failed(link
);
2067 HASHMAP_FOREACH(netdev
, link
->network
->stacked_netdevs
, i
) {
2069 log_struct(LOG_DEBUG
,
2070 LOG_LINK_INTERFACE(link
),
2071 LOG_NETDEV_INTERFACE(netdev
),
2072 LOG_LINK_MESSAGE(link
, "Enslaving by '%s'", netdev
->ifname
),
2075 r
= netdev_join(netdev
, link
, netdev_join_handler
);
2077 log_struct_errno(LOG_WARNING
, r
,
2078 LOG_LINK_INTERFACE(link
),
2079 LOG_NETDEV_INTERFACE(netdev
),
2080 LOG_LINK_MESSAGE(link
, "Could not join netdev '%s': %m", netdev
->ifname
),
2082 link_enter_failed(link
);
2092 static int link_set_ipv4_forward(Link
*link
) {
2095 if (!link_ipv4_forward_enabled(link
))
2098 /* We propagate the forwarding flag from one interface to the
2099 * global setting one way. This means: as long as at least one
2100 * interface was configured at any time that had IP forwarding
2101 * enabled the setting will stay on for good. We do this
2102 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2103 * somewhat in sync (see below). */
2105 r
= write_string_file("/proc/sys/net/ipv4/ip_forward", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE
);
2107 log_link_warning_errno(link
, r
, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
2112 static int link_set_ipv6_forward(Link
*link
) {
2115 if (!link_ipv6_forward_enabled(link
))
2118 /* On Linux, the IPv6 stack does not not know a per-interface
2119 * packet forwarding setting: either packet forwarding is on
2120 * for all, or off for all. We hence don't bother with a
2121 * per-interface setting, but simply propagate the interface
2122 * flag, if it is set, to the global flag, one-way. Note that
2123 * while IPv4 would allow a per-interface flag, we expose the
2124 * same behaviour there and also propagate the setting from
2125 * one to all, to keep things simple (see above). */
2127 r
= write_string_file("/proc/sys/net/ipv6/conf/all/forwarding", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE
);
2129 log_link_warning_errno(link
, r
, "Cannot configure IPv6 packet forwarding, ignoring: %m");
2134 static int link_set_ipv6_privacy_extensions(Link
*link
) {
2135 char buf
[DECIMAL_STR_MAX(unsigned) + 1];
2136 IPv6PrivacyExtensions s
;
2137 const char *p
= NULL
;
2140 s
= link_ipv6_privacy_extensions(link
);
2144 p
= strjoina("/proc/sys/net/ipv6/conf/", link
->ifname
, "/use_tempaddr");
2145 xsprintf(buf
, "%u", (unsigned) link
->network
->ipv6_privacy_extensions
);
2147 r
= write_string_file(p
, buf
, WRITE_STRING_FILE_VERIFY_ON_FAILURE
);
2149 log_link_warning_errno(link
, r
, "Cannot configure IPv6 privacy extension for interface: %m");
2154 static int link_set_ipv6_accept_ra(Link
*link
) {
2155 const char *p
= NULL
;
2158 /* Make this a NOP if IPv6 is not available */
2159 if (!socket_ipv6_is_supported())
2162 if (link
->flags
& IFF_LOOPBACK
)
2168 p
= strjoina("/proc/sys/net/ipv6/conf/", link
->ifname
, "/accept_ra");
2170 /* We handle router advertisements ourselves, tell the kernel to GTFO */
2171 r
= write_string_file(p
, "0", WRITE_STRING_FILE_VERIFY_ON_FAILURE
);
2173 log_link_warning_errno(link
, r
, "Cannot disable kernel IPv6 accept_ra for interface: %m");
2178 static int link_set_ipv6_dad_transmits(Link
*link
) {
2179 char buf
[DECIMAL_STR_MAX(int) + 1];
2180 const char *p
= NULL
;
2183 /* Make this a NOP if IPv6 is not available */
2184 if (!socket_ipv6_is_supported())
2187 if (link
->flags
& IFF_LOOPBACK
)
2193 if (link
->network
->ipv6_dad_transmits
< 0)
2196 p
= strjoina("/proc/sys/net/ipv6/conf/", link
->ifname
, "/dad_transmits");
2197 xsprintf(buf
, "%i", link
->network
->ipv6_dad_transmits
);
2199 r
= write_string_file(p
, buf
, WRITE_STRING_FILE_VERIFY_ON_FAILURE
);
2201 log_link_warning_errno(link
, r
, "Cannot set IPv6 dad transmits for interface: %m");
2206 static int link_set_ipv6_hop_limit(Link
*link
) {
2207 char buf
[DECIMAL_STR_MAX(int) + 1];
2208 const char *p
= NULL
;
2211 /* Make this a NOP if IPv6 is not available */
2212 if (!socket_ipv6_is_supported())
2215 if (link
->flags
& IFF_LOOPBACK
)
2221 if (link
->network
->ipv6_hop_limit
< 0)
2224 p
= strjoina("/proc/sys/net/ipv6/conf/", link
->ifname
, "/hop_limit");
2225 xsprintf(buf
, "%i", link
->network
->ipv6_hop_limit
);
2227 r
= write_string_file(p
, buf
, WRITE_STRING_FILE_VERIFY_ON_FAILURE
);
2229 log_link_warning_errno(link
, r
, "Cannot set IPv6 hop limit for interface: %m");
2234 static int link_drop_foreign_config(Link
*link
) {
2240 SET_FOREACH(address
, link
->addresses_foreign
, i
) {
2241 /* we consider IPv6LL addresses to be managed by the kernel */
2242 if (address
->family
== AF_INET6
&& in_addr_is_link_local(AF_INET6
, &address
->in_addr
) == 1)
2245 r
= address_remove(address
, link
, link_address_remove_handler
);
2250 SET_FOREACH(route
, link
->routes_foreign
, i
) {
2251 /* do not touch routes managed by the kernel */
2252 if (route
->protocol
== RTPROT_KERNEL
)
2255 r
= route_remove(route
, link
, link_address_remove_handler
);
2263 static int link_update_lldp(Link
*link
) {
2271 if (link
->flags
& IFF_UP
) {
2272 r
= sd_lldp_start(link
->lldp
);
2274 log_link_debug(link
, "Started LLDP.");
2276 r
= sd_lldp_stop(link
->lldp
);
2278 log_link_debug(link
, "Stopped LLDP.");
2284 static int link_configure(Link
*link
) {
2288 assert(link
->network
);
2289 assert(link
->state
== LINK_STATE_PENDING
);
2291 /* Drop foreign config, but ignore loopback or critical devices.
2292 * We do not want to remove loopback address or addresses used for root NFS. */
2293 if (!(link
->flags
& IFF_LOOPBACK
) && !(link
->network
->dhcp_critical
)) {
2294 r
= link_drop_foreign_config(link
);
2299 r
= link_set_bridge_fdb(link
);
2303 r
= link_set_proxy_arp(link
);
2307 r
= link_set_ipv4_forward(link
);
2311 r
= link_set_ipv6_forward(link
);
2315 r
= link_set_ipv6_privacy_extensions(link
);
2319 r
= link_set_ipv6_accept_ra(link
);
2323 r
= link_set_ipv6_dad_transmits(link
);
2327 r
= link_set_ipv6_hop_limit(link
);
2331 if (link_ipv4ll_enabled(link
)) {
2332 r
= ipv4ll_configure(link
);
2337 if (link_dhcp4_enabled(link
)) {
2338 r
= dhcp4_configure(link
);
2343 if (link_dhcp4_server_enabled(link
)) {
2344 r
= sd_dhcp_server_new(&link
->dhcp_server
, link
->ifindex
);
2348 r
= sd_dhcp_server_attach_event(link
->dhcp_server
, NULL
, 0);
2353 if (link_dhcp6_enabled(link
) ||
2354 link_ipv6_accept_ra_enabled(link
)) {
2355 r
= dhcp6_configure(link
);
2360 if (link_ipv6_accept_ra_enabled(link
)) {
2361 r
= ndisc_configure(link
);
2366 if (link_lldp_rx_enabled(link
)) {
2367 r
= sd_lldp_new(&link
->lldp
, link
->ifindex
);
2371 r
= sd_lldp_match_capabilities(link
->lldp
,
2372 link
->network
->lldp_mode
== LLDP_MODE_ROUTERS_ONLY
?
2373 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS
:
2374 SD_LLDP_SYSTEM_CAPABILITIES_ALL
);
2378 r
= sd_lldp_set_filter_address(link
->lldp
, &link
->mac
);
2382 r
= sd_lldp_attach_event(link
->lldp
, NULL
, 0);
2386 r
= sd_lldp_set_callback(link
->lldp
, lldp_handler
, link
);
2390 r
= link_update_lldp(link
);
2395 if (link_has_carrier(link
)) {
2396 r
= link_acquire_conf(link
);
2401 return link_enter_join_netdev(link
);
2404 static int link_initialized_and_synced(sd_netlink
*rtnl
, sd_netlink_message
*m
,
2406 _cleanup_link_unref_ Link
*link
= userdata
;
2411 assert(link
->ifname
);
2412 assert(link
->manager
);
2414 if (link
->state
!= LINK_STATE_PENDING
)
2417 log_link_debug(link
, "Link state is up-to-date");
2419 r
= link_new_bound_by_list(link
);
2423 r
= link_handle_bound_by_list(link
);
2427 if (!link
->network
) {
2428 r
= network_get(link
->manager
, link
->udev_device
, link
->ifname
,
2429 &link
->mac
, &network
);
2431 link_enter_unmanaged(link
);
2436 if (link
->flags
& IFF_LOOPBACK
) {
2437 if (network
->link_local
!= ADDRESS_FAMILY_NO
)
2438 log_link_debug(link
, "Ignoring link-local autoconfiguration for loopback link");
2440 if (network
->dhcp
!= ADDRESS_FAMILY_NO
)
2441 log_link_debug(link
, "Ignoring DHCP clients for loopback link");
2443 if (network
->dhcp_server
)
2444 log_link_debug(link
, "Ignoring DHCP server for loopback link");
2447 r
= network_apply(link
->manager
, network
, link
);
2452 r
= link_new_bound_to_list(link
);
2456 r
= link_configure(link
);
2463 int link_initialized(Link
*link
, struct udev_device
*device
) {
2464 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
2468 assert(link
->manager
);
2469 assert(link
->manager
->rtnl
);
2472 if (link
->state
!= LINK_STATE_PENDING
)
2475 if (link
->udev_device
)
2478 log_link_debug(link
, "udev initialized link");
2480 link
->udev_device
= udev_device_ref(device
);
2482 /* udev has initialized the link, but we don't know if we have yet
2483 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2484 * when it returns we know that the pending NEWLINKs have already been
2485 * processed and that we are up-to-date */
2487 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_GETLINK
,
2492 r
= sd_netlink_call_async(link
->manager
->rtnl
, req
,
2493 link_initialized_and_synced
, link
, 0, NULL
);
2502 static int link_load(Link
*link
) {
2503 _cleanup_free_
char *network_file
= NULL
,
2506 *dhcp4_address
= NULL
,
2507 *ipv4ll_address
= NULL
;
2508 union in_addr_union address
;
2509 union in_addr_union route_dst
;
2515 r
= parse_env_file(link
->state_file
, NEWLINE
,
2516 "NETWORK_FILE", &network_file
,
2517 "ADDRESSES", &addresses
,
2519 "DHCP4_ADDRESS", &dhcp4_address
,
2520 "IPV4LL_ADDRESS", &ipv4ll_address
,
2522 if (r
< 0 && r
!= -ENOENT
)
2523 return log_link_error_errno(link
, r
, "Failed to read %s: %m", link
->state_file
);
2530 suffix
= strrchr(network_file
, '.');
2532 log_link_debug(link
, "Failed to get network name from %s", network_file
);
2533 goto network_file_fail
;
2537 r
= network_get_by_name(link
->manager
, basename(network_file
), &network
);
2539 log_link_debug_errno(link
, r
, "Failed to get network %s: %m", basename(network_file
));
2540 goto network_file_fail
;
2543 r
= network_apply(link
->manager
, network
, link
);
2545 return log_link_error_errno(link
, r
, "Failed to apply network %s: %m", basename(network_file
));
2554 _cleanup_free_
char *address_str
= NULL
;
2555 char *prefixlen_str
;
2557 unsigned char prefixlen
;
2559 r
= extract_first_word(&p
, &address_str
, NULL
, 0);
2561 log_link_debug_errno(link
, r
, "Failed to extract next address string: %m");
2567 prefixlen_str
= strchr(address_str
, '/');
2568 if (!prefixlen_str
) {
2569 log_link_debug(link
, "Failed to parse address and prefix length %s", address_str
);
2573 *prefixlen_str
++ = '\0';
2575 r
= sscanf(prefixlen_str
, "%hhu", &prefixlen
);
2577 log_link_error(link
, "Failed to parse prefixlen %s", prefixlen_str
);
2581 r
= in_addr_from_string_auto(address_str
, &family
, &address
);
2583 log_link_debug_errno(link
, r
, "Failed to parse address %s: %m", address_str
);
2587 r
= address_add(link
, family
, &address
, prefixlen
, NULL
);
2589 return log_link_error_errno(link
, r
, "Failed to add address: %m");
2598 _cleanup_free_
char *route_str
= NULL
;
2599 _cleanup_(sd_event_source_unrefp
) sd_event_source
*expire
= NULL
;
2601 char *prefixlen_str
;
2603 unsigned char prefixlen
, tos
, table
;
2606 r
= extract_first_word(&p
, &route_str
, NULL
, 0);
2608 log_link_debug_errno(link
, r
, "Failed to extract next route string: %m");
2614 prefixlen_str
= strchr(route_str
, '/');
2615 if (!prefixlen_str
) {
2616 log_link_debug(link
, "Failed to parse route %s", route_str
);
2620 *prefixlen_str
++ = '\0';
2622 r
= sscanf(prefixlen_str
, "%hhu/%hhu/%"SCNu32
"/%hhu/"USEC_FMT
, &prefixlen
, &tos
, &priority
, &table
, &lifetime
);
2624 log_link_debug(link
,
2625 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
2630 r
= in_addr_from_string_auto(route_str
, &family
, &route_dst
);
2632 log_link_debug_errno(link
, r
, "Failed to parse route destination %s: %m", route_str
);
2636 r
= route_add(link
, family
, &route_dst
, prefixlen
, tos
, priority
, table
, &route
);
2638 return log_link_error_errno(link
, r
, "Failed to add route: %m");
2640 if (lifetime
!= USEC_INFINITY
) {
2641 r
= sd_event_add_time(link
->manager
->event
, &expire
, clock_boottime_or_monotonic(), lifetime
,
2642 0, route_expire_handler
, route
);
2644 log_link_warning_errno(link
, r
, "Could not arm route expiration handler: %m");
2647 route
->lifetime
= lifetime
;
2648 sd_event_source_unref(route
->expire
);
2649 route
->expire
= expire
;
2654 if (dhcp4_address
) {
2655 r
= in_addr_from_string(AF_INET
, dhcp4_address
, &address
);
2657 log_link_debug_errno(link
, r
, "Falied to parse DHCPv4 address %s: %m", dhcp4_address
);
2658 goto dhcp4_address_fail
;
2661 r
= sd_dhcp_client_new(&link
->dhcp_client
);
2663 return log_link_error_errno(link
, r
, "Falied to create DHCPv4 client: %m");
2665 r
= sd_dhcp_client_set_request_address(link
->dhcp_client
, &address
.in
);
2667 return log_link_error_errno(link
, r
, "Falied to set inital DHCPv4 address %s: %m", dhcp4_address
);
2672 if (ipv4ll_address
) {
2673 r
= in_addr_from_string(AF_INET
, ipv4ll_address
, &address
);
2675 log_link_debug_errno(link
, r
, "Falied to parse IPv4LL address %s: %m", ipv4ll_address
);
2676 goto ipv4ll_address_fail
;
2679 r
= sd_ipv4ll_new(&link
->ipv4ll
);
2681 return log_link_error_errno(link
, r
, "Falied to create IPv4LL client: %m");
2683 r
= sd_ipv4ll_set_address(link
->ipv4ll
, &address
.in
);
2685 return log_link_error_errno(link
, r
, "Falied to set inital IPv4LL address %s: %m", ipv4ll_address
);
2688 ipv4ll_address_fail
:
2693 int link_add(Manager
*m
, sd_netlink_message
*message
, Link
**ret
) {
2695 _cleanup_udev_device_unref_
struct udev_device
*device
= NULL
;
2696 char ifindex_str
[2 + DECIMAL_STR_MAX(int)];
2704 r
= link_new(m
, message
, ret
);
2710 log_link_debug(link
, "Link %d added", link
->ifindex
);
2712 r
= link_load(link
);
2716 if (detect_container() <= 0) {
2717 /* not in a container, udev will be around */
2718 sprintf(ifindex_str
, "n%d", link
->ifindex
);
2719 device
= udev_device_new_from_device_id(m
->udev
, ifindex_str
);
2721 r
= log_link_warning_errno(link
, errno
, "Could not find udev device: %m");
2725 if (udev_device_get_is_initialized(device
) <= 0) {
2727 log_link_debug(link
, "link pending udev initialization...");
2731 r
= link_initialized(link
, device
);
2735 /* we are calling a callback directly, so must take a ref */
2738 r
= link_initialized_and_synced(m
->rtnl
, NULL
, link
);
2745 link_enter_failed(link
);
2749 int link_ipv6ll_gained(Link
*link
, const struct in6_addr
*address
) {
2754 log_link_info(link
, "Gained IPv6LL");
2756 link
->ipv6ll_address
= *address
;
2757 link_check_ready(link
);
2759 if (!IN_SET(link
->state
, LINK_STATE_PENDING
, LINK_STATE_UNMANAGED
, LINK_STATE_FAILED
)) {
2760 r
= link_acquire_ipv6_conf(link
);
2762 link_enter_failed(link
);
2770 static int link_carrier_gained(Link
*link
) {
2775 if (!IN_SET(link
->state
, LINK_STATE_PENDING
, LINK_STATE_UNMANAGED
, LINK_STATE_FAILED
)) {
2776 r
= link_acquire_conf(link
);
2778 link_enter_failed(link
);
2782 r
= link_enter_set_addresses(link
);
2787 r
= link_handle_bound_by_list(link
);
2794 static int link_carrier_lost(Link
*link
) {
2799 r
= link_stop_clients(link
);
2801 link_enter_failed(link
);
2805 r
= link_handle_bound_by_list(link
);
2812 int link_carrier_reset(Link
*link
) {
2817 if (link_has_carrier(link
)) {
2818 r
= link_carrier_lost(link
);
2822 r
= link_carrier_gained(link
);
2826 log_link_info(link
, "Reset carrier");
2832 int link_update(Link
*link
, sd_netlink_message
*m
) {
2833 struct ether_addr mac
;
2836 bool had_carrier
, carrier_gained
, carrier_lost
;
2840 assert(link
->ifname
);
2843 if (link
->state
== LINK_STATE_LINGER
) {
2845 log_link_info(link
, "Link readded");
2846 link_set_state(link
, LINK_STATE_ENSLAVING
);
2848 r
= link_new_carrier_maps(link
);
2853 r
= sd_netlink_message_read_string(m
, IFLA_IFNAME
, &ifname
);
2854 if (r
>= 0 && !streq(ifname
, link
->ifname
)) {
2855 log_link_info(link
, "Renamed to %s", ifname
);
2857 link_free_carrier_maps(link
);
2859 r
= free_and_strdup(&link
->ifname
, ifname
);
2863 r
= link_new_carrier_maps(link
);
2868 r
= sd_netlink_message_read_u32(m
, IFLA_MTU
, &mtu
);
2869 if (r
>= 0 && mtu
> 0) {
2871 if (!link
->original_mtu
) {
2872 link
->original_mtu
= mtu
;
2873 log_link_debug(link
, "Saved original MTU: %" PRIu32
, link
->original_mtu
);
2876 if (link
->dhcp_client
) {
2877 r
= sd_dhcp_client_set_mtu(link
->dhcp_client
,
2880 log_link_warning_errno(link
, r
, "Could not update MTU in DHCP client: %m");
2886 /* The kernel may broadcast NEWLINK messages without the MAC address
2887 set, simply ignore them. */
2888 r
= sd_netlink_message_read_ether_addr(m
, IFLA_ADDRESS
, &mac
);
2890 if (memcmp(link
->mac
.ether_addr_octet
, mac
.ether_addr_octet
,
2893 memcpy(link
->mac
.ether_addr_octet
, mac
.ether_addr_octet
,
2896 log_link_debug(link
, "MAC address: "
2897 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
2898 mac
.ether_addr_octet
[0],
2899 mac
.ether_addr_octet
[1],
2900 mac
.ether_addr_octet
[2],
2901 mac
.ether_addr_octet
[3],
2902 mac
.ether_addr_octet
[4],
2903 mac
.ether_addr_octet
[5]);
2906 r
= sd_ipv4ll_set_mac(link
->ipv4ll
, &link
->mac
);
2908 return log_link_warning_errno(link
, r
, "Could not update MAC address in IPv4LL client: %m");
2911 if (link
->dhcp_client
) {
2912 const DUID
*duid
= link_duid(link
);
2914 r
= sd_dhcp_client_set_mac(link
->dhcp_client
,
2915 (const uint8_t *) &link
->mac
,
2919 return log_link_warning_errno(link
, r
, "Could not update MAC address in DHCP client: %m");
2921 r
= sd_dhcp_client_set_iaid_duid(link
->dhcp_client
,
2922 link
->network
->iaid
,
2924 duid
->raw_data_len
> 0 ? duid
->raw_data
: NULL
,
2925 duid
->raw_data_len
);
2927 return log_link_warning_errno(link
, r
, "Could not update DUID/IAID in DHCP client: %m");
2930 if (link
->dhcp6_client
) {
2931 const DUID
* duid
= link_duid(link
);
2933 r
= sd_dhcp6_client_set_mac(link
->dhcp6_client
,
2934 (const uint8_t *) &link
->mac
,
2938 return log_link_warning_errno(link
, r
, "Could not update MAC address in DHCPv6 client: %m");
2940 r
= sd_dhcp6_client_set_iaid(link
->dhcp6_client
,
2941 link
->network
->iaid
);
2943 return log_link_warning_errno(link
, r
, "Could not update DHCPv6 IAID: %m");
2945 r
= sd_dhcp6_client_set_duid(link
->dhcp6_client
,
2947 duid
->raw_data_len
> 0 ? duid
->raw_data
: NULL
,
2948 duid
->raw_data_len
);
2950 return log_link_warning_errno(link
, r
, "Could not update DHCPv6 DUID: %m");
2955 had_carrier
= link_has_carrier(link
);
2957 r
= link_update_flags(link
, m
);
2961 r
= link_update_lldp(link
);
2965 carrier_gained
= !had_carrier
&& link_has_carrier(link
);
2966 carrier_lost
= had_carrier
&& !link_has_carrier(link
);
2968 if (carrier_gained
) {
2969 log_link_info(link
, "Gained carrier");
2971 r
= link_carrier_gained(link
);
2974 } else if (carrier_lost
) {
2975 log_link_info(link
, "Lost carrier");
2977 r
= link_carrier_lost(link
);
2985 static void print_link_hashmap(FILE *f
, const char *prefix
, Hashmap
* h
) {
2993 if (hashmap_isempty(h
))
2997 HASHMAP_FOREACH(link
, h
, i
) {
3001 fprintf(f
, "%i", link
->ifindex
);
3008 int link_save(Link
*link
) {
3009 _cleanup_free_
char *temp_path
= NULL
;
3010 _cleanup_fclose_
FILE *f
= NULL
;
3011 const char *admin_state
, *oper_state
;
3018 assert(link
->state_file
);
3019 assert(link
->lease_file
);
3020 assert(link
->manager
);
3022 if (link
->state
== LINK_STATE_LINGER
) {
3023 unlink(link
->state_file
);
3027 link_lldp_save(link
);
3029 admin_state
= link_state_to_string(link
->state
);
3030 assert(admin_state
);
3032 oper_state
= link_operstate_to_string(link
->operstate
);
3035 r
= fopen_temporary(link
->state_file
, &f
, &temp_path
);
3039 fchmod(fileno(f
), 0644);
3042 "# This is private data. Do not parse.\n"
3045 admin_state
, oper_state
);
3047 if (link
->network
) {
3049 sd_dhcp6_lease
*dhcp6_lease
= NULL
;
3050 const char *dhcp_domainname
= NULL
;
3051 char **dhcp6_domains
= NULL
;
3053 if (link
->dhcp6_client
) {
3054 r
= sd_dhcp6_client_get_lease(link
->dhcp6_client
, &dhcp6_lease
);
3055 if (r
< 0 && r
!= -ENOMSG
)
3056 log_link_debug(link
, "No DHCPv6 lease");
3059 fprintf(f
, "NETWORK_FILE=%s\n", link
->network
->filename
);
3063 fputstrv(f
, link
->network
->dns
, NULL
, &space
);
3065 if (link
->network
->dhcp_use_dns
&&
3067 const struct in_addr
*addresses
;
3069 r
= sd_dhcp_lease_get_dns(link
->dhcp_lease
, &addresses
);
3073 serialize_in_addrs(f
, addresses
, r
);
3078 if (link
->network
->dhcp_use_dns
&& dhcp6_lease
) {
3079 struct in6_addr
*in6_addrs
;
3081 r
= sd_dhcp6_lease_get_dns(dhcp6_lease
, &in6_addrs
);
3085 serialize_in6_addrs(f
, in6_addrs
, r
);
3093 fputstrv(f
, link
->network
->ntp
, NULL
, &space
);
3095 if (link
->network
->dhcp_use_ntp
&&
3097 const struct in_addr
*addresses
;
3099 r
= sd_dhcp_lease_get_ntp(link
->dhcp_lease
, &addresses
);
3103 serialize_in_addrs(f
, addresses
, r
);
3108 if (link
->network
->dhcp_use_ntp
&& dhcp6_lease
) {
3109 struct in6_addr
*in6_addrs
;
3112 r
= sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease
,
3117 serialize_in6_addrs(f
, in6_addrs
, r
);
3121 r
= sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease
, &hosts
);
3123 fputstrv(f
, hosts
, NULL
, &space
);
3128 if (link
->network
->dhcp_use_domains
!= DHCP_USE_DOMAINS_NO
) {
3129 if (link
->dhcp_lease
)
3130 (void) sd_dhcp_lease_get_domainname(link
->dhcp_lease
, &dhcp_domainname
);
3133 (void) sd_dhcp6_lease_get_domains(dhcp6_lease
, &dhcp6_domains
);
3136 fputs("DOMAINS=", f
);
3137 fputstrv(f
, link
->network
->search_domains
, NULL
, &space
);
3139 if (link
->network
->dhcp_use_domains
== DHCP_USE_DOMAINS_YES
&& dhcp_domainname
)
3140 fputs_with_space(f
, dhcp_domainname
, NULL
, &space
);
3142 if (link
->network
->dhcp_use_domains
== DHCP_USE_DOMAINS_YES
&& dhcp6_domains
)
3143 fputstrv(f
, dhcp6_domains
, NULL
, &space
);
3147 fputs("ROUTE_DOMAINS=", f
);
3148 fputstrv(f
, link
->network
->route_domains
, NULL
, NULL
);
3150 if (link
->network
->dhcp_use_domains
== DHCP_USE_DOMAINS_ROUTE
&& dhcp_domainname
)
3151 fputs_with_space(f
, dhcp_domainname
, NULL
, &space
);
3153 if (link
->network
->dhcp_use_domains
== DHCP_USE_DOMAINS_ROUTE
&& dhcp6_domains
)
3154 fputstrv(f
, dhcp6_domains
, NULL
, &space
);
3158 fprintf(f
, "LLMNR=%s\n",
3159 resolve_support_to_string(link
->network
->llmnr
));
3160 fprintf(f
, "MDNS=%s\n",
3161 resolve_support_to_string(link
->network
->mdns
));
3163 if (link
->network
->dnssec_mode
!= _DNSSEC_MODE_INVALID
)
3164 fprintf(f
, "DNSSEC=%s\n",
3165 dnssec_mode_to_string(link
->network
->dnssec_mode
));
3167 if (!set_isempty(link
->network
->dnssec_negative_trust_anchors
)) {
3170 fputs("DNSSEC_NTA=", f
);
3172 SET_FOREACH(n
, link
->network
->dnssec_negative_trust_anchors
, i
)
3173 fputs_with_space(f
, n
, NULL
, &space
);
3177 fputs("ADDRESSES=", f
);
3179 SET_FOREACH(a
, link
->addresses
, i
) {
3180 _cleanup_free_
char *address_str
= NULL
;
3182 r
= in_addr_to_string(a
->family
, &a
->in_addr
, &address_str
);
3186 fprintf(f
, "%s%s/%u", space
? " " : "", address_str
, a
->prefixlen
);
3191 fputs("ROUTES=", f
);
3193 SET_FOREACH(route
, link
->routes
, i
) {
3194 _cleanup_free_
char *route_str
= NULL
;
3196 r
= in_addr_to_string(route
->family
, &route
->dst
, &route_str
);
3200 fprintf(f
, "%s%s/%hhu/%hhu/%"PRIu32
"/%hhu/"USEC_FMT
, space
? " " : "", route_str
,
3201 route
->dst_prefixlen
, route
->tos
, route
->priority
, route
->table
, route
->lifetime
);
3208 print_link_hashmap(f
, "CARRIER_BOUND_TO=", link
->bound_to_links
);
3209 print_link_hashmap(f
, "CARRIER_BOUND_BY=", link
->bound_by_links
);
3211 if (link
->dhcp_lease
) {
3212 struct in_addr address
;
3213 const char *tz
= NULL
;
3215 assert(link
->network
);
3217 r
= sd_dhcp_lease_get_timezone(link
->dhcp_lease
, &tz
);
3219 fprintf(f
, "TIMEZONE=%s\n", tz
);
3221 r
= sd_dhcp_lease_get_address(link
->dhcp_lease
, &address
);
3223 fputs("DHCP4_ADDRESS=", f
);
3224 serialize_in_addrs(f
, &address
, 1);
3228 r
= dhcp_lease_save(link
->dhcp_lease
, link
->lease_file
);
3236 unlink(link
->lease_file
);
3239 struct in_addr address
;
3241 r
= sd_ipv4ll_get_address(link
->ipv4ll
, &address
);
3243 fputs("IPV4LL_ADDRESS=", f
);
3244 serialize_in_addrs(f
, &address
, 1);
3249 r
= fflush_and_check(f
);
3253 if (rename(temp_path
, link
->state_file
) < 0) {
3261 (void) unlink(link
->state_file
);
3263 (void) unlink(temp_path
);
3265 return log_link_error_errno(link
, r
, "Failed to save link data to %s: %m", link
->state_file
);
3268 /* The serialized state in /run is no longer up-to-date. */
3269 void link_dirty(Link
*link
) {
3274 /* mark manager dirty as link is dirty */
3275 manager_dirty(link
->manager
);
3277 r
= set_ensure_allocated(&link
->manager
->dirty_links
, NULL
);
3279 /* allocation errors are ignored */
3282 r
= set_put(link
->manager
->dirty_links
, link
);
3284 /* don't take another ref if the link was already dirty */
3290 /* The serialized state in /run is up-to-date */
3291 void link_clean(Link
*link
) {
3293 assert(link
->manager
);
3295 set_remove(link
->manager
->dirty_links
, link
);
3299 static const char* const link_state_table
[_LINK_STATE_MAX
] = {
3300 [LINK_STATE_PENDING
] = "pending",
3301 [LINK_STATE_ENSLAVING
] = "configuring",
3302 [LINK_STATE_SETTING_ADDRESSES
] = "configuring",
3303 [LINK_STATE_SETTING_ROUTES
] = "configuring",
3304 [LINK_STATE_CONFIGURED
] = "configured",
3305 [LINK_STATE_UNMANAGED
] = "unmanaged",
3306 [LINK_STATE_FAILED
] = "failed",
3307 [LINK_STATE_LINGER
] = "linger",
3310 DEFINE_STRING_TABLE_LOOKUP(link_state
, LinkState
);
3312 static const char* const link_operstate_table
[_LINK_OPERSTATE_MAX
] = {
3313 [LINK_OPERSTATE_OFF
] = "off",
3314 [LINK_OPERSTATE_NO_CARRIER
] = "no-carrier",
3315 [LINK_OPERSTATE_DORMANT
] = "dormant",
3316 [LINK_OPERSTATE_CARRIER
] = "carrier",
3317 [LINK_OPERSTATE_DEGRADED
] = "degraded",
3318 [LINK_OPERSTATE_ROUTABLE
] = "routable",
3321 DEFINE_STRING_TABLE_LOOKUP(link_operstate
, LinkOperationalState
);