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network: drop [BridgeMDB] entries if Bridge= is not set
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
53e1b683 1/* SPDX-License-Identifier: LGPL-2.1+ */
f579559b 2
9aa5d8ba 3#include <netinet/in.h>
f579559b 4#include <linux/if.h>
8f815e8b 5#include <linux/if_arp.h>
518cd6b5 6#include <linux/if_link.h>
4cc7a82c 7#include <unistd.h>
f579559b 8
b5efdb8a 9#include "alloc-util.h"
737f1405
YW		 10#include "bond.h"
11#include "bridge.h"
1346b1f0 12#include "bus-util.h"
27dfc982 13#include "dhcp-identifier.h"
bd91b83e 14#include "dhcp-lease-internal.h"
686d13b9 15#include "env-file.h"
4bb7cc82 16#include "ethtool-util.h"
3ffd4af2 17#include "fd-util.h"
cf1d700d 18#include "fileio.h"
737f1405 19#include "ipvlan.h"
ef118d00 20#include "missing_network.h"
cf1d700d 21#include "netlink-util.h"
c6f7c917 22#include "network-internal.h"
3ddcbeea 23#include "networkd-can.h"
8fcf1d61 24#include "networkd-dhcp-server.h"
ca5ad760
YW		 25#include "networkd-dhcp4.h"
26#include "networkd-dhcp6.h"
27#include "networkd-ipv4ll.h"
a0e5c15d 28#include "networkd-ipv6-proxy-ndp.h"
6a1af3d4
YW		 29#include "networkd-link-bus.h"
30#include "networkd-link.h"
8e1ad1ea 31#include "networkd-lldp-tx.h"
23f53b99 32#include "networkd-manager.h"
1e7a0e21 33#include "networkd-ndisc.h"
e4a71bf3 34#include "networkd-neighbor.h"
518cd6b5 35#include "networkd-sriov.h"
7465dd22 36#include "networkd-radv.h"
bce67bbe 37#include "networkd-routing-policy-rule.h"
8d968fdd 38#include "networkd-wifi.h"
cf1d700d
TG		 39#include "set.h"
40#include "socket-util.h"
bf331d87 41#include "stat-util.h"
15a5e950 42#include "stdio-util.h"
8b43440b 43#include "string-table.h"
51517f9e 44#include "strv.h"
62e021a9 45#include "sysctl-util.h"
34658df2 46#include "tc.h"
e4de7287 47#include "tmpfile-util.h"
299ad32d 48#include "udev-util.h"
cf1d700d 49#include "util.h"
737f1405 50#include "vrf.h"
fc2f9534 51
bdb9f580
YW		 52uint32_t link_get_vrf_table(Link *link) {
53 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
54}
55
56uint32_t link_get_dhcp_route_table(Link *link) {
57 /* When the interface is part of an VRF use the VRFs routing table, unless
58 * another table is explicitly specified. */
59 if (link->network->dhcp_route_table_set)
60 return link->network->dhcp_route_table;
61 return link_get_vrf_table(link);
62}
63
64uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
65 if (link->network->ipv6_accept_ra_route_table_set)
66 return link->network->ipv6_accept_ra_route_table;
67 return link_get_vrf_table(link);
68}
69
f24648a6
YW		 70DUID* link_get_duid(Link *link) {
71 if (link->network->duid.type != _DUID_TYPE_INVALID)
72 return &link->network->duid;
73 else
74 return &link->manager->duid;
75}
76
b9d74c40
LP		 77static bool link_dhcp6_enabled(Link *link) {
78 assert(link);
79
fa709992
LP		 80 if (!socket_ipv6_is_supported())
81 return false;
82
78c958f8
TG		 83 if (link->flags & IFF_LOOPBACK)
84 return false;
85
86 if (!link->network)
87 return false;
88
f2bfcdb9
YW		 89 if (link->network->bond)
90 return false;
91
500b96eb 92 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 93 return false;
94
e0ee46f2 95 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 96}
97
b9d74c40
LP		 98static bool link_dhcp4_enabled(Link *link) {
99 assert(link);
100
78c958f8
TG		 101 if (link->flags & IFF_LOOPBACK)
102 return false;
103
104 if (!link->network)
105 return false;
106
f2bfcdb9
YW		 107 if (link->network->bond)
108 return false;
109
500b96eb 110 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 111 return false;
112
e0ee46f2 113 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 114}
115
b9d74c40
LP		 116static bool link_dhcp4_server_enabled(Link *link) {
117 assert(link);
118
78c958f8
TG		 119 if (link->flags & IFF_LOOPBACK)
120 return false;
121
122 if (!link->network)
123 return false;
124
f2bfcdb9
YW		 125 if (link->network->bond)
126 return false;
127
500b96eb 128 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 129 return false;
130
78c958f8
TG		 131 return link->network->dhcp_server;
132}
133
2d792895 134bool link_ipv4ll_enabled(Link *link, AddressFamily mask) {
b9d74c40 135 assert(link);
910feb78 136 assert((mask & ~(ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) == 0);
b9d74c40 137
78c958f8
TG		 138 if (link->flags & IFF_LOOPBACK)
139 return false;
140
141 if (!link->network)
142 return false;
143
500b96eb 144 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 145 return false;
146
98d20a17 147 if (STRPTR_IN_SET(link->kind,
148 "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
c6ac3729 149 "vti6", "nlmon", "xfrm"))
a8f5bba6
JD		 150 return false;
151
f410d463
YW		 152 /* L3 or L3S mode do not support ARP. */
153 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
154 return false;
155
f2bfcdb9
YW		 156 if (link->network->bond)
157 return false;
158
910feb78 159 return link->network->link_local & mask;
8bc17bb3
SS		 160}
161
b9d74c40
LP		 162static bool link_ipv6ll_enabled(Link *link) {
163 assert(link);
164
fa709992
LP		 165 if (!socket_ipv6_is_supported())
166 return false;
167
d0d6a4cd
TG		 168 if (link->flags & IFF_LOOPBACK)
169 return false;
170
171 if (!link->network)
172 return false;
173
500b96eb 174 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 175 return false;
176
177 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon"))
a8f5bba6
JD		 178 return false;
179
f2bfcdb9
YW		 180 if (link->network->bond)
181 return false;
182
e0ee46f2 183 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 184}
185
439689c6
SS		 186static bool link_ipv6_enabled(Link *link) {
187 assert(link);
188
189 if (!socket_ipv6_is_supported())
190 return false;
191
b102cdca 192 if (link->network->bond)
2b00a4e0
TY		 193 return false;
194
500b96eb 195 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 196 return false;
197
4cef7fe3 198 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
adfeee49
YW		 199 if (link_ipv6ll_enabled(link))
200 return true;
201
202 if (network_has_static_ipv6_configurations(link->network))
203 return true;
204
205 return false;
439689c6
SS		 206}
207
7465dd22
PF		 208static bool link_radv_enabled(Link *link) {
209 assert(link);
210
211 if (!link_ipv6ll_enabled(link))
212 return false;
213
55a7c78b 214 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 215}
216
769d324c 217static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 218 assert(link);
219
5a8bcb67
LP		 220 if (link->flags & IFF_LOOPBACK)
221 return false;
222
223 if (!link->network)
224 return false;
225
2d792895 226 if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
765afd5c
LP		 227 return false;
228
e0ee46f2 229 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 230}
231
232static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 233 assert(link);
765afd5c
LP		 234
235 if (!socket_ipv6_is_supported())
236 return false;
237
769d324c
LP		 238 if (link->flags & IFF_LOOPBACK)
239 return false;
240
241 if (!link->network)
242 return false;
243
2d792895 244 if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
765afd5c
LP		 245 return false;
246
e0ee46f2 247 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 248}
249
23d8b221
SS		 250static bool link_proxy_arp_enabled(Link *link) {
251 assert(link);
252
253 if (link->flags & IFF_LOOPBACK)
254 return false;
255
256 if (!link->network)
257 return false;
258
259 if (link->network->proxy_arp < 0)
260 return false;
261
262 return true;
263}
264
b9d74c40
LP		 265static bool link_ipv6_accept_ra_enabled(Link *link) {
266 assert(link);
267
fa709992
LP		 268 if (!socket_ipv6_is_supported())
269 return false;
270
f5a8c43f
TG		 271 if (link->flags & IFF_LOOPBACK)
272 return false;
273
274 if (!link->network)
275 return false;
276
702c979f
SS		 277 if (!link_ipv6ll_enabled(link))
278 return false;
279
f5a8c43f
TG		 280 /* If unset use system default (enabled if local forwarding is disabled.
281 * disabled if local forwarding is enabled).
282 * If set, ignore or enforce RA independent of local forwarding state.
283 */
284 if (link->network->ipv6_accept_ra < 0)
285 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
286 return !link_ipv6_forward_enabled(link);
287 else if (link->network->ipv6_accept_ra > 0)
288 /* accept RA even if ip_forward is enabled */
289 return true;
290 else
291 /* ignore RA */
292 return false;
293}
294
1f0d9695 295static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 296 assert(link);
d68e2e59
LP		 297
298 if (!socket_ipv6_is_supported())
299 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
300
49092e22 301 if (link->flags & IFF_LOOPBACK)
1f0d9695 302 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 303
304 if (!link->network)
1f0d9695 305 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 306
307 return link->network->ipv6_privacy_extensions;
308}
309
57ad7607 310static int link_update_ipv6_sysctl(Link *link) {
482efedc 311 bool enabled;
439689c6
SS		 312 int r;
313
314 if (link->flags & IFF_LOOPBACK)
315 return 0;
316
482efedc
SS		 317 enabled = link_ipv6_enabled(link);
318 if (enabled) {
319 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", false);
320 if (r < 0)
57ad7607
ZJS		 321 return log_link_warning_errno(link, r, "Cannot enable IPv6: %m");
322
323 log_link_info(link, "IPv6 successfully enabled");
482efedc 324 }
439689c6
SS		 325
326 return 0;
327}
328
34bf3c00
YW		 329static bool link_is_enslaved(Link *link) {
330 if (link->flags & IFF_SLAVE)
331 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
332 return true;
333
34bf3c00
YW		 334 if (!link->network)
335 return false;
336
bb262ef0 337 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 338 return true;
339
bb262ef0
YW		 340 /* TODO: add conditions for other netdevs. */
341
34bf3c00
YW		 342 return false;
343}
344
45e11abf
YW		 345static void link_update_master_operstate(Link *link, NetDev *netdev) {
346 Link *master;
347
348 if (!netdev)
349 return;
350
7936917e
YW		 351 if (netdev->ifindex <= 0)
352 return;
353
45e11abf
YW		 354 if (link_get(link->manager, netdev->ifindex, &master) < 0)
355 return;
356
357 link_update_operstate(master, true);
358}
359
360void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 361 LinkOperationalState operstate;
1678fbb3
YW		 362 LinkCarrierState carrier_state;
363 LinkAddressState address_state;
35c5a9ca 364 _cleanup_strv_free_ char **p = NULL;
1678fbb3 365 uint8_t scope = RT_SCOPE_NOWHERE;
35c5a9ca 366 bool changed = false;
1678fbb3 367 Address *address;
14153d1b 368
84de38c5
TG		 369 assert(link);
370
371 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 372 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 373 else if (link_has_carrier(link)) {
1678fbb3
YW		 374 if (link_is_enslaved(link))
375 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 376 else
1678fbb3 377 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 378 } else if (link->flags & IFF_UP)
1678fbb3 379 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 380 else
1678fbb3 381 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 382
1678fbb3 383 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 384 Link *slave;
385
90e74a66 386 SET_FOREACH(slave, link->slaves) {
959f65d3 387 link_update_operstate(slave, false);
84de38c5 388
1678fbb3
YW		 389 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
390 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 391 }
959f65d3 392 }
84de38c5 393
90e74a66 394 SET_FOREACH(address, link->addresses) {
1678fbb3
YW		 395 if (!address_is_ready(address))
396 continue;
84de38c5 397
1678fbb3
YW		 398 if (address->scope < scope)
399 scope = address->scope;
400 }
84de38c5 401
1678fbb3 402 /* for operstate we also take foreign addresses into account */
90e74a66 403 SET_FOREACH(address, link->addresses_foreign) {
1678fbb3
YW		 404 if (!address_is_ready(address))
405 continue;
406
407 if (address->scope < scope)
408 scope = address->scope;
409 }
410
411 if (scope < RT_SCOPE_SITE)
412 /* universally accessible addresses found */
413 address_state = LINK_ADDRESS_STATE_ROUTABLE;
414 else if (scope < RT_SCOPE_HOST)
415 /* only link or site local addresses found */
416 address_state = LINK_ADDRESS_STATE_DEGRADED;
84de38c5 417 else
1678fbb3
YW		 418 /* no useful addresses found */
419 address_state = LINK_ADDRESS_STATE_OFF;
420
421 /* Mapping of address and carrier state vs operational state
422 * carrier state
423 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
424 * ------------------------------------------------------------------------------
425 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
426 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
427 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
428 */
84de38c5 429
1678fbb3
YW		 430 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
431 operstate = (LinkOperationalState) carrier_state;
432 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
433 operstate = LINK_OPERSTATE_ROUTABLE;
434 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
435 operstate = LINK_OPERSTATE_DEGRADED;
436 else
14153d1b
YW		 437 operstate = LINK_OPERSTATE_ENSLAVED;
438
35c5a9ca
YW		 439 if (link->carrier_state != carrier_state) {
440 link->carrier_state = carrier_state;
441 changed = true;
442 if (strv_extend(&p, "CarrierState") < 0)
443 log_oom();
444 }
959f65d3 445
35c5a9ca
YW		 446 if (link->address_state != address_state) {
447 link->address_state = address_state;
448 changed = true;
449 if (strv_extend(&p, "AddressState") < 0)
450 log_oom();
959f65d3
YW		 451 }
452
84de38c5
TG		 453 if (link->operstate != operstate) {
454 link->operstate = operstate;
35c5a9ca
YW		 455 changed = true;
456 if (strv_extend(&p, "OperationalState") < 0)
457 log_oom();
84de38c5 458 }
959f65d3 459
35c5a9ca
YW		 460 if (p)
461 link_send_changed_strv(link, p);
462 if (changed)
463 link_dirty(link);
464
45e11abf
YW		 465 if (also_update_master && link->network) {
466 link_update_master_operstate(link, link->network->bond);
467 link_update_master_operstate(link, link->network->bridge);
959f65d3 468 }
84de38c5
TG		 469}
470
51d18171
TG		 471#define FLAG_STRING(string, flag, old, new) \
472 (((old ^ new) & flag) \
473 ? ((old & flag) ? (" -" string) : (" +" string)) \
474 : "")
475
bb262ef0 476static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 477 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
478 uint8_t operstate;
479 int r;
480
481 assert(link);
482
483 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 484 if (r < 0)
485 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 486
1c4baffc 487 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 488 if (r < 0)
489 /* if we got a message without operstate, take it to mean
490 the state was unchanged */
491 operstate = link->kernel_operstate;
492
bb262ef0 493 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 494 return 0;
495
496 if (link->flags != flags) {
6a7a4e4d 497 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",
51d18171
TG		 498 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
499 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
500 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
501 FLAG_STRING("UP", IFF_UP, link->flags, flags),
502 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
503 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
504 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
505 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
506 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
507 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
508 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
509 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
510 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
511 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
512 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
513 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
514 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
515 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
516 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
517
518 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
519 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
520 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
521 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
522 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
523 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
524 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
525 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
526
527 /* link flags are currently at most 18 bits, let's align to
528 * printing 20 */
529 if (unknown_flags_added)
79008bdd 530 log_link_debug(link,
6a7a4e4d 531 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 532 unknown_flags_added);
533
534 if (unknown_flags_removed)
79008bdd 535 log_link_debug(link,
6a7a4e4d 536 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 537 unknown_flags_removed);
538 }
539
540 link->flags = flags;
541 link->kernel_operstate = operstate;
542
959f65d3 543 link_update_operstate(link, true);
51d18171
TG		 544
545 return 0;
546}
547
1c4baffc 548static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 549 _cleanup_(link_unrefp) Link *link = NULL;
6cad256d 550 const char *ifname, *kind = NULL;
b710e6b6 551 unsigned short iftype;
572b21d9
YW		 552 int r, ifindex;
553 uint16_t type;
f579559b 554
0c2f9b84 555 assert(manager);
505f8da7 556 assert(message);
f579559b
TG		 557 assert(ret);
558
6cad256d
TJ		 559 /* check for link kind */
560 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
561 if (r == 0) {
db2f8a2e 562 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 563 r = sd_netlink_message_exit_container(message);
564 if (r < 0)
565 return r;
566 }
567
1c4baffc 568 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 569 if (r < 0)
570 return r;
571 else if (type != RTM_NEWLINK)
572 return -EINVAL;
573
574 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
575 if (r < 0)
576 return r;
577 else if (ifindex <= 0)
578 return -EINVAL;
579
b710e6b6
LP		 580 r = sd_rtnl_message_link_get_type(message, &iftype);
581 if (r < 0)
582 return r;
583
1c4baffc 584 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 585 if (r < 0)
586 return r;
587
17f9c355 588 link = new(Link, 1);
f579559b
TG		 589 if (!link)
590 return -ENOMEM;
591
17f9c355
YW		 592 *link = (Link) {
593 .n_ref = 1,
594 .manager = manager,
595 .state = LINK_STATE_PENDING,
17f9c355
YW		 596 .ifindex = ifindex,
597 .iftype = iftype,
15761549
YW		 598
599 .n_dns = (unsigned) -1,
600 .dns_default_route = -1,
601 .llmnr = _RESOLVE_SUPPORT_INVALID,
602 .mdns = _RESOLVE_SUPPORT_INVALID,
603 .dnssec_mode = _DNSSEC_MODE_INVALID,
604 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
17f9c355
YW		 605 };
606
505f8da7
TG		 607 link->ifname = strdup(ifname);
608 if (!link->ifname)
609 return -ENOMEM;
f579559b 610
6cad256d
TJ		 611 if (kind) {
612 link->kind = strdup(kind);
613 if (!link->kind)
614 return -ENOMEM;
615 }
616
cbff7170
TJ		 617 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
618 if (r < 0)
619 log_link_debug_errno(link, r, "New device has no master, continuing without");
620
1c4baffc 621 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 622 if (r < 0)
34437b4f 623 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 624
c643bda5 625 r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac);
4bb7cc82
YW		 626 if (r < 0)
627 log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
628
c643bda5
YW		 629 r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver);
630 if (r < 0)
631 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
632
572b21d9
YW		 633 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &link->alternative_names);
634 if (r < 0 && r != -ENODATA)
635 return r;
636
34437b4f 637 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 638 return -ENOMEM;
fe8db0c5 639
34437b4f 640 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 641 return -ENOMEM;
642
34437b4f 643 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 644 return -ENOMEM;
645
d5099efc 646 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 647 if (r < 0)
648 return r;
649
650 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 651 if (r < 0)
652 return r;
653
bb262ef0 654 r = link_update_flags(link, message, false);
51d18171
TG		 655 if (r < 0)
656 return r;
657
1cc6c93a 658 *ret = TAKE_PTR(link);
f579559b
TG		 659
660 return 0;
661}
662
15761549
YW		 663void link_ntp_settings_clear(Link *link) {
664 link->ntp = strv_free(link->ntp);
665}
666
667void link_dns_settings_clear(Link *link) {
e77bd3fd
YW		 668 if (link->n_dns != (unsigned) -1)
669 for (unsigned i = 0; i < link->n_dns; i++)
670 in_addr_full_free(link->dns[i]);
15761549
YW		 671 link->dns = mfree(link->dns);
672 link->n_dns = (unsigned) -1;
673
674 link->search_domains = ordered_set_free_free(link->search_domains);
675 link->route_domains = ordered_set_free_free(link->route_domains);
676
677 link->dns_default_route = -1;
678 link->llmnr = _RESOLVE_SUPPORT_INVALID;
679 link->mdns = _RESOLVE_SUPPORT_INVALID;
680 link->dnssec_mode = _DNSSEC_MODE_INVALID;
681 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
682
683 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
684}
685
1a6bb31f
YW		 686static void link_free_engines(Link *link) {
687 if (!link)
688 return;
689
690 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
691 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
692 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
1a6bb31f
YW		 693
694 link->lldp = sd_lldp_unref(link->lldp);
695
696 ndisc_flush(link);
697
698 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
699 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 700 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
1a6bb31f
YW		 701 link->ndisc = sd_ndisc_unref(link->ndisc);
702 link->radv = sd_radv_unref(link->radv);
703}
704
8301aa0b 705static Link *link_free(Link *link) {
428fd0a7
TG		 706 Address *address;
707
8301aa0b 708 assert(link);
f579559b 709
15761549
YW		 710 link_ntp_settings_clear(link);
711 link_dns_settings_clear(link);
712
8eec0b9d
YW		 713 link->routes = set_free(link->routes);
714 link->routes_foreign = set_free(link->routes_foreign);
6e537f62
YW		 715 link->dhcp_routes = set_free(link->dhcp_routes);
716 link->dhcp_routes_old = set_free(link->dhcp_routes_old);
1633c457
YW		 717 link->dhcp6_routes = set_free(link->dhcp6_routes);
718 link->dhcp6_routes_old = set_free(link->dhcp6_routes_old);
719 link->dhcp6_pd_routes = set_free(link->dhcp6_pd_routes);
720 link->dhcp6_pd_routes_old = set_free(link->dhcp6_pd_routes_old);
69203fba 721 link->ndisc_routes = set_free(link->ndisc_routes);
adda1ed9 722
8eec0b9d
YW		 723 link->nexthops = set_free(link->nexthops);
724 link->nexthops_foreign = set_free(link->nexthops_foreign);
c16c7808 725
8eec0b9d
YW		 726 link->neighbors = set_free(link->neighbors);
727 link->neighbors_foreign = set_free(link->neighbors_foreign);
d1bdafd2 728
8eec0b9d
YW		 729 link->addresses = set_free(link->addresses);
730 link->addresses_foreign = set_free(link->addresses_foreign);
e5526518 731 link->static_addresses = set_free(link->static_addresses);
1633c457
YW		 732 link->dhcp6_addresses = set_free(link->dhcp6_addresses);
733 link->dhcp6_addresses_old = set_free(link->dhcp6_addresses_old);
734 link->dhcp6_pd_addresses = set_free(link->dhcp6_pd_addresses);
735 link->dhcp6_pd_addresses_old = set_free(link->dhcp6_pd_addresses_old);
69203fba 736 link->ndisc_addresses = set_free(link->ndisc_addresses);
adda1ed9 737
11bf3cce
LP		 738 while ((address = link->pool_addresses)) {
739 LIST_REMOVE(addresses, link->pool_addresses, address);
740 address_free(address);
741 }
742
7272b25e 743 link_lldp_emit_stop(link);
1a6bb31f 744 link_free_engines(link);
68a8723c 745 free(link->lease_file);
49699bac
SS		 746 free(link->lldp_file);
747
c166a070 748 free(link->ifname);
572b21d9 749 strv_free(link->alternative_names);
ceac4078 750 free(link->kind);
8d968fdd 751 free(link->ssid);
c643bda5 752 free(link->driver);
6cad256d 753
db2f8a2e 754 (void) unlink(link->state_file);
fe8db0c5 755 free(link->state_file);
c166a070 756
51517f9e 757 sd_device_unref(link->sd_device);
b5db00e5 758
0d4ad91d 759 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 760 hashmap_free(link->bound_by_links);
761
5f707e12 762 set_free_with_destructor(link->slaves, link_unref);
033295c1 763
c9c908a6
YW		 764 network_unref(link->network);
765
8301aa0b 766 return mfree(link);
14b746f7
TG		 767}
768
8301aa0b 769DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 770
11a7f229
TG		 771int link_get(Manager *m, int ifindex, Link **ret) {
772 Link *link;
11a7f229
TG		 773
774 assert(m);
e856ed00 775 assert(ifindex > 0);
11a7f229
TG		 776 assert(ret);
777
ae06ab10 778 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 779 if (!link)
780 return -ENODEV;
781
782 *ret = link;
783
784 return 0;
785}
786
af9ba57a 787void link_set_state(Link *link, LinkState state) {
e331e246
TG		 788 assert(link);
789
790 if (link->state == state)
791 return;
792
0beb9542
YW		 793 log_link_debug(link, "State changed: %s -> %s",
794 link_state_to_string(link->state),
795 link_state_to_string(state));
796
e331e246
TG		 797 link->state = state;
798
799 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 800}
801
57bd6899
TG		 802static void link_enter_unmanaged(Link *link) {
803 assert(link);
804
e331e246 805 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 806
84de38c5 807 link_dirty(link);
57bd6899
TG		 808}
809
95355a28 810int link_stop_clients(Link *link, bool may_keep_dhcp) {
111bb8f9 811 int r = 0, k;
051e77ca 812 Address *ad;
111bb8f9
TG		 813
814 assert(link);
815 assert(link->manager);
816 assert(link->manager->event);
817
80060352
ZJS		 818 bool keep_dhcp = may_keep_dhcp &&
819 link->network &&
820 (link->manager->restarting ||
821 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
822
823 if (link->dhcp_client && !keep_dhcp) {
111bb8f9 824 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 825 if (k < 0)
36c7d709 826 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 827 }
828
ba179154 829 if (link->ipv4ll) {
111bb8f9 830 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 831 if (k < 0)
36c7d709 832 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 833 }
834
051e77ca
SS		 835 if (link->network)
836 LIST_FOREACH(addresses, ad, link->network->static_addresses)
837 if (ad->acd && sd_ipv4acd_is_running(ad->acd) == 0) {
838 k = sd_ipv4acd_stop(ad->acd);
839 if (k < 0)
840 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
841 }
842
f5a8c43f
TG		 843 if (link->dhcp6_client) {
844 k = sd_dhcp6_client_stop(link->dhcp6_client);
845 if (k < 0)
36c7d709 846 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 847 }
4138fb2c 848
1633c457
YW		 849 if (link_dhcp6_pd_is_enabled(link)) {
850 k = dhcp6_pd_remove(link);
851 if (k < 0)
852 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
853 }
854
1e7a0e21
LP		 855 if (link->ndisc) {
856 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 857 if (k < 0)
36c7d709 858 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 859 }
860
7465dd22 861 if (link->radv) {
290696e5 862 k = sd_radv_stop(link->radv);
7465dd22
PF		 863 if (k < 0)
864 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
865 }
866
7272b25e 867 link_lldp_emit_stop(link);
111bb8f9
TG		 868 return r;
869}
870
b22d8a00 871void link_enter_failed(Link *link) {
ef1ba606 872 assert(link);
f882c247 873
370e9930 874 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 875 return;
876
6a7a4e4d 877 log_link_warning(link, "Failed");
449f7554 878
e331e246 879 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 880
95355a28 881 link_stop_clients(link, false);
111bb8f9 882
84de38c5 883 link_dirty(link);
f882c247
TG		 884}
885
7033af49
YW		 886static int link_join_netdevs_after_configured(Link *link) {
887 NetDev *netdev;
7033af49
YW		 888 int r;
889
90e74a66 890 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7033af49
YW		 891 if (netdev->ifindex > 0)
892 /* Assume already enslaved. */
893 continue;
894
895 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
896 continue;
897
898 log_struct(LOG_DEBUG,
899 LOG_LINK_INTERFACE(link),
900 LOG_NETDEV_INTERFACE(netdev),
901 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
902
903 r = netdev_join(netdev, link, NULL);
904 if (r < 0)
905 return log_struct_errno(LOG_WARNING, r,
906 LOG_LINK_INTERFACE(link),
907 LOG_NETDEV_INTERFACE(netdev),
908 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
909 }
910
911 return 0;
912}
913
e3a7b048 914static void link_enter_configured(Link *link) {
dd43110f
TG		 915 assert(link);
916 assert(link->network);
e3a7b048 917
289e6774 918 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 919 return;
dd43110f 920
e331e246 921 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 922
7033af49
YW		 923 (void) link_join_netdevs_after_configured(link);
924
84de38c5 925 link_dirty(link);
dd43110f
TG		 926}
927
47079967 928static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 929 RoutingPolicyRule *rule, *rrule = NULL;
930 int r;
931
932 assert(link);
933 assert(link->network);
934
2428613f
YW		 935 link->routing_policy_rules_configured = false;
936
8a9b3a23 937 LIST_FOREACH(rules, rule, link->network->rules) {
b80a511b 938 r = routing_policy_rule_get(link->manager, rule, &rrule);
ff14e2eb
YW		 939 if (r >= 0) {
940 if (r == 0)
941 (void) routing_policy_rule_make_local(link->manager, rrule);
8a9b3a23
SS		 942 continue;
943 }
944
9f08a578 945 r = routing_policy_rule_configure(rule, link, NULL);
4ff296b0
YW		 946 if (r < 0)
947 return log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
7ef7e550
YW		 948 if (r > 0)
949 link->routing_policy_rule_messages++;
8a9b3a23
SS		 950 }
951
952 routing_policy_rule_purge(link->manager, link);
5d976f5f 953 if (link->routing_policy_rule_messages == 0)
7715629e 954 link->routing_policy_rules_configured = true;
5d976f5f 955 else {
7715629e 956 log_link_debug(link, "Setting routing policy rules");
b425c3ae
YW		 957 link_set_state(link, LINK_STATE_CONFIGURING);
958 }
8a9b3a23
SS		 959
960 return 0;
961}
962
c16c7808
SS		 963static int nexthop_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
964 int r;
965
966 assert(link);
967 assert(link->nexthop_messages > 0);
968 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
969 LINK_STATE_FAILED, LINK_STATE_LINGER));
970
971 link->nexthop_messages--;
972
973 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
974 return 1;
975
976 r = sd_netlink_message_get_errno(m);
977 if (r < 0 && r != -EEXIST) {
5ecb131d 978 log_link_message_warning_errno(link, m, r, "Could not set nexthop");
c16c7808
SS		 979 link_enter_failed(link);
980 return 1;
981 }
982
983 if (link->nexthop_messages == 0) {
984 log_link_debug(link, "Nexthop set");
985 link->static_nexthops_configured = true;
986 link_check_ready(link);
987 }
988
989 return 1;
990}
991
eb01a2df 992static int link_request_set_nexthop(Link *link) {
c16c7808
SS		 993 NextHop *nh;
994 int r;
995
0c816fcc
YW		 996 link->static_nexthops_configured = false;
997
c16c7808
SS		 998 LIST_FOREACH(nexthops, nh, link->network->static_nexthops) {
999 r = nexthop_configure(nh, link, nexthop_handler);
1000 if (r < 0)
1001 return log_link_warning_errno(link, r, "Could not set nexthop: %m");
1002 if (r > 0)
1003 link->nexthop_messages++;
1004 }
1005
1006 if (link->nexthop_messages == 0) {
1007 link->static_nexthops_configured = true;
1008 link_check_ready(link);
1009 } else {
1010 log_link_debug(link, "Setting nexthop");
1011 link_set_state(link, LINK_STATE_CONFIGURING);
1012 }
1013
1014 return 1;
1015}
1016
302a796f 1017static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1018 int r;
1019
1046bf9b 1020 assert(link);
7715629e 1021 assert(link->route_messages > 0);
289e6774
WKI		 1022 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
1023 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1024
7715629e 1025 link->route_messages--;
f882c247 1026
77a008c0 1027 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1028 return 1;
1029
1c4baffc 1030 r = sd_netlink_message_get_errno(m);
4ff296b0 1031 if (r < 0 && r != -EEXIST) {
5ecb131d 1032 log_link_message_warning_errno(link, m, r, "Could not set route");
4ff296b0
YW		 1033 link_enter_failed(link);
1034 return 1;
1035 }
f882c247 1036
7715629e 1037 if (link->route_messages == 0) {
6a7a4e4d 1038 log_link_debug(link, "Routes set");
7715629e 1039 link->static_routes_configured = true;
0c816fcc 1040 link_request_set_nexthop(link);
dd3efc09 1041 }
f882c247
TG		 1042
1043 return 1;
1044}
1045
b5799eeb 1046int link_request_set_routes(Link *link) {
bf61b05a
LP		 1047 enum {
1048 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
1049 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
1050 _PHASE_MAX
1051 } phase;
a6cc569e 1052 Route *rt;
f882c247
TG		 1053 int r;
1054
1055 assert(link);
1056 assert(link->network);
289e6774 1057 assert(link->state != _LINK_STATE_INVALID);
f882c247 1058
2428613f 1059 link->static_routes_configured = false;
27c34f73 1060
e5526518
YW		 1061 if (!link->addresses_ready)
1062 return 0;
1063
4e2ef9d9
YW		 1064 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
1065 /* During configuring addresses, the link lost its carrier. As networkd is dropping
1066 * the addresses now, let's not configure the routes either. */
1067 return 0;
1068
47079967 1069 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 1070 if (r < 0)
1071 return r;
f882c247 1072
bf61b05a
LP		 1073 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
1074 for (phase = 0; phase < _PHASE_MAX; phase++)
1075 LIST_FOREACH(routes, rt, link->network->static_routes) {
1985c54f
YW		 1076 if (rt->gateway_from_dhcp)
1077 continue;
0d34228f 1078
6ff5cc6b 1079 if ((in_addr_is_null(rt->family, &rt->gw) && ordered_set_isempty(rt->multipath_routes)) != (phase == PHASE_NON_GATEWAY))
bf61b05a 1080 continue;
a6cc569e 1081
80b0e860 1082 r = route_configure(rt, link, route_handler, NULL);
4ff296b0
YW		 1083 if (r < 0)
1084 return log_link_warning_errno(link, r, "Could not set routes: %m");
c4423317
YW		 1085 if (r > 0)
1086 link->route_messages++;
0d34228f 1087 }
f5be5601 1088
7715629e
ST		 1089 if (link->route_messages == 0) {
1090 link->static_routes_configured = true;
0c816fcc 1091 link_request_set_nexthop(link);
b425c3ae 1092 } else {
6a7a4e4d 1093 log_link_debug(link, "Setting routes");
b425c3ae
YW		 1094 link_set_state(link, LINK_STATE_CONFIGURING);
1095 }
f882c247
TG		 1096
1097 return 0;
1098}
1099
6accfd31
DA		 1100void link_check_ready(Link *link) {
1101 Address *a;
6accfd31
DA		 1102
1103 assert(link);
1104
5f58af25
YW		 1105 if (link->state == LINK_STATE_CONFIGURED)
1106 return;
1107
1108 if (link->state != LINK_STATE_CONFIGURING) {
1109 log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31 1110 return;
39373cb9 1111 }
6accfd31
DA		 1112
1113 if (!link->network)
1114 return;
1115
39373cb9
YW		 1116 if (!link->addresses_configured) {
1117 log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 1118 return;
39373cb9 1119 }
6accfd31 1120
39373cb9
YW		 1121 if (!link->neighbors_configured) {
1122 log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
6accfd31 1123 return;
39373cb9 1124 }
6accfd31 1125
90e74a66 1126 SET_FOREACH(a, link->addresses)
39373cb9
YW		 1127 if (!address_is_ready(a)) {
1128 _cleanup_free_ char *str = NULL;
1129
1130 (void) in_addr_to_string(a->family, &a->in_addr, &str);
1131 log_link_debug(link, "%s(): an address %s/%d is not ready.", __func__, strnull(str), a->prefixlen);
6aa5773b 1132 return;
39373cb9 1133 }
6aa5773b 1134
39373cb9
YW		 1135 if (!link->static_routes_configured) {
1136 log_link_debug(link, "%s(): static routes are not configured.", __func__);
6accfd31 1137 return;
39373cb9 1138 }
6accfd31 1139
39373cb9
YW		 1140 if (!link->static_nexthops_configured) {
1141 log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 1142 return;
39373cb9 1143 }
c16c7808 1144
39373cb9
YW		 1145 if (!link->routing_policy_rules_configured) {
1146 log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 1147 return;
39373cb9 1148 }
6accfd31 1149
39373cb9
YW		 1150 if (!link->tc_configured) {
1151 log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
4ecdcb07 1152 return;
39373cb9 1153 }
4ecdcb07 1154
39373cb9
YW		 1155 if (!link->sr_iov_configured) {
1156 log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 1157 return;
39373cb9 1158 }
518cd6b5 1159
463797c1 1160 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
50550722
YW		 1161 bool has_ndisc_address = false;
1162 NDiscAddress *n;
6accfd31 1163
1c09d84e 1164 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !link->ipv4ll_address_configured) {
39373cb9 1165 log_link_debug(link, "%s(): IPv4LL is not configured.", __func__);
463797c1 1166 return;
39373cb9 1167 }
6accfd31 1168
463797c1 1169 if (link_ipv6ll_enabled(link) &&
39373cb9
YW		 1170 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
1171 log_link_debug(link, "%s(): IPv6LL is not configured.", __func__);
463797c1 1172 return;
39373cb9 1173 }
6accfd31 1174
90e74a66 1175 SET_FOREACH(n, link->ndisc_addresses)
50550722
YW		 1176 if (!n->marked) {
1177 has_ndisc_address = true;
1178 break;
1179 }
1180
15797d6a 1181 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
50550722 1182 !link->dhcp_address && set_isempty(link->dhcp6_addresses) && !has_ndisc_address &&
15797d6a
YW		 1183 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
1184 log_link_debug(link, "%s(): DHCP4 or DHCP6 is enabled but no dynamic address is assigned yet.", __func__);
659ad3a0
YW		 1185 return;
1186 }
1187
1633c457 1188 if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_dhcp6_pd_is_enabled(link) || link_ipv6_accept_ra_enabled(link)) {
39373cb9
YW		 1189 if (!link->dhcp4_configured &&
1190 !(link->dhcp6_address_configured && link->dhcp6_route_configured) &&
1191 !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) &&
d98c546d 1192 !(link->ndisc_addresses_configured && link->ndisc_routes_configured) &&
1c09d84e 1193 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
39373cb9
YW		 1194 /* When DHCP or RA is enabled, at least one protocol must provide an address, or
1195 * an IPv4ll fallback address must be configured. */
1196 log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
1197 return;
1198 }
1199
d98c546d 1200 log_link_debug(link, "%s(): dhcp4:%s dhcp6_addresses:%s dhcp_routes:%s dhcp_pd_addresses:%s dhcp_pd_routes:%s ndisc_addresses:%s ndisc_routes:%s",
39373cb9
YW		 1201 __func__,
1202 yes_no(link->dhcp4_configured),
1203 yes_no(link->dhcp6_address_configured),
1204 yes_no(link->dhcp6_route_configured),
1205 yes_no(link->dhcp6_pd_address_configured),
1206 yes_no(link->dhcp6_pd_route_configured),
d98c546d
YW		 1207 yes_no(link->ndisc_addresses_configured),
1208 yes_no(link->ndisc_routes_configured));
39373cb9 1209 }
463797c1 1210 }
6accfd31 1211
5f58af25 1212 link_enter_configured(link);
6accfd31
DA		 1213
1214 return;
1215}
1216
e4a71bf3
WKI		 1217static int link_request_set_neighbors(Link *link) {
1218 Neighbor *neighbor;
1219 int r;
1220
1221 assert(link);
1222 assert(link->network);
1223 assert(link->state != _LINK_STATE_INVALID);
1224
2428613f 1225 link->neighbors_configured = false;
e4a71bf3
WKI		 1226
1227 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
1228 r = neighbor_configure(neighbor, link, NULL);
4ff296b0
YW		 1229 if (r < 0)
1230 return log_link_warning_errno(link, r, "Could not set neighbor: %m");
e4a71bf3
WKI		 1231 }
1232
1233 if (link->neighbor_messages == 0) {
1234 link->neighbors_configured = true;
1235 link_check_ready(link);
b425c3ae 1236 } else {
e4a71bf3 1237 log_link_debug(link, "Setting neighbors");
b425c3ae
YW		 1238 link_set_state(link, LINK_STATE_CONFIGURING);
1239 }
e4a71bf3
WKI		 1240
1241 return 0;
1242}
1243
e5526518
YW		 1244static int link_set_bridge_fdb(Link *link) {
1245 FdbEntry *fdb_entry;
1246 int r;
1247
1248 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1249 r = fdb_entry_configure(link, fdb_entry);
1250 if (r < 0)
1251 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
1252 }
1253
1254 return 0;
1255}
1256
3db468ea
DM		 1257static int link_set_bridge_mdb(Link *link) {
1258 MdbEntry *mdb_entry;
1259 int r;
1260
1261 if (!link->network)
1262 return 0;
1263
3db468ea
DM		 1264 LIST_FOREACH(static_mdb_entries, mdb_entry, link->network->static_mdb_entries) {
1265 r = mdb_entry_configure(link, mdb_entry);
1266 if (r < 0)
1267 return log_link_error_errno(link, r, "Failed to add entry to multicast group database: %m");
1268 }
1269
1270 return 0;
1271}
1272
e5526518
YW		 1273static int static_address_ready_callback(Address *address) {
1274 Address *a;
e5526518
YW		 1275 Link *link;
1276
1277 assert(address);
1278 assert(address->link);
1279
1280 link = address->link;
1281
1282 if (!link->addresses_configured)
1283 return 0;
1284
90e74a66 1285 SET_FOREACH(a, link->static_addresses)
e5526518
YW		 1286 if (!address_is_ready(a)) {
1287 _cleanup_free_ char *str = NULL;
1288
1289 (void) in_addr_to_string(a->family, &a->in_addr, &str);
1290 log_link_debug(link, "an address %s/%u is not ready", strnull(str), a->prefixlen);
1291 return 0;
1292 }
1293
1294 /* This should not be called again */
90e74a66 1295 SET_FOREACH(a, link->static_addresses)
e5526518
YW		 1296 a->callback = NULL;
1297
1298 link->addresses_ready = true;
1299
1300 return link_request_set_routes(link);
1301}
1302
3650173f 1303static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1304 int r;
1305
4958aee4 1306 assert(rtnl);
f5be5601
TG		 1307 assert(m);
1308 assert(link);
1309 assert(link->ifname);
7715629e 1310 assert(link->address_messages > 0);
289e6774 1311 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1312 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1313
7715629e 1314 link->address_messages--;
f882c247 1315
5da8149f 1316 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1317 return 1;
1318
1c4baffc 1319 r = sd_netlink_message_get_errno(m);
4ff296b0 1320 if (r < 0 && r != -EEXIST) {
5ecb131d 1321 log_link_message_warning_errno(link, m, r, "Could not set address");
4ff296b0
YW		 1322 link_enter_failed(link);
1323 return 1;
1324 } else if (r >= 0)
1325 (void) manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1326
7715629e 1327 if (link->address_messages == 0) {
e5526518
YW		 1328 Address *a;
1329
6a7a4e4d 1330 log_link_debug(link, "Addresses set");
c42ff3a1 1331 link->addresses_configured = true;
e5526518
YW		 1332
1333 /* When all static addresses are already ready, then static_address_ready_callback()
1334 * will not be called automatically. So, call it here. */
1335 a = set_first(link->static_addresses);
1336 if (!a) {
1337 log_link_warning(link, "No static address is stored.");
1338 link_enter_failed(link);
1339 return 1;
1340 }
1341 if (!a->callback) {
1342 log_link_warning(link, "Address ready callback is not set.");
1343 link_enter_failed(link);
1344 return 1;
1345 }
1346 r = a->callback(a);
1347 if (r < 0)
1348 link_enter_failed(link);
dd3efc09 1349 }
f882c247
TG		 1350
1351 return 1;
1352}
1353
e5526518
YW		 1354static int static_address_configure(Address *address, Link *link, bool update) {
1355 Address *ret;
197e2809 1356 int r;
f6bb7ac5 1357
e5526518
YW		 1358 assert(address);
1359 assert(link);
1360
1361 r = address_configure(address, link, address_handler, update, &ret);
1362 if (r < 0)
1363 return log_link_warning_errno(link, r, "Could not configure static address: %m");
1364
1365 link->address_messages++;
1366
1367 r = set_ensure_put(&link->static_addresses, &address_hash_ops, ret);
1368 if (r < 0)
1369 return log_link_warning_errno(link, r, "Failed to store static address: %m");
1370
1371 ret->callback = static_address_ready_callback;
f6bb7ac5 1372
197e2809 1373 return 0;
f6bb7ac5
TJ		 1374}
1375
289e6774 1376static int link_request_set_addresses(Link *link) {
95b74ef6 1377 AddressLabel *label;
a6cc569e 1378 Address *ad;
bd6379ec 1379 Prefix *p;
f882c247
TG		 1380 int r;
1381
1382 assert(link);
1383 assert(link->network);
f5be5601 1384 assert(link->state != _LINK_STATE_INVALID);
f882c247 1385
9b966cee
YW		 1386 if (link->address_remove_messages != 0) {
1387 log_link_debug(link, "Removing old addresses, new addresses will be configured later.");
1388 link->request_static_addresses = true;
1389 return 0;
1390 }
1391
2428613f 1392 /* Reset all *_configured flags we are configuring. */
9b966cee 1393 link->request_static_addresses = false;
2428613f 1394 link->addresses_configured = false;
6aa5773b 1395 link->addresses_ready = false;
2428613f
YW		 1396 link->neighbors_configured = false;
1397 link->static_routes_configured = false;
c16c7808 1398 link->static_nexthops_configured = false;
2428613f
YW		 1399 link->routing_policy_rules_configured = false;
1400
f6bb7ac5
TJ		 1401 r = link_set_bridge_fdb(link);
1402 if (r < 0)
1403 return r;
1404
f3ef324d
YW		 1405 r = link_request_set_neighbors(link);
1406 if (r < 0)
1407 return r;
e4a71bf3 1408
3d3d4255 1409 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1410 bool update;
1411
6f5d73ab
YW		 1412 if (ad->family == AF_INET6 && !in_addr_is_null(ad->family, &ad->in_addr_peer))
1413 update = address_get(link, ad->family, &ad->in_addr_peer, ad->prefixlen, NULL) > 0;
1414 else
1415 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
a47a6dae 1416
e5526518 1417 r = static_address_configure(ad, link, update);
4ff296b0 1418 if (r < 0)
e5526518 1419 return r;
95b74ef6
SS		 1420 }
1421
61c0ef4f 1422 if (link->network->router_prefix_delegation & RADV_PREFIX_DELEGATION_STATIC)
bd6379ec
SS		 1423 LIST_FOREACH(prefixes, p, link->network->static_prefixes) {
1424 _cleanup_(address_freep) Address *address = NULL;
1425
1426 if (!p->assign)
1427 continue;
1428
1429 r = address_new(&address);
1430 if (r < 0)
e5526518 1431 return log_oom();
bd6379ec
SS		 1432
1433 r = sd_radv_prefix_get_prefix(p->radv_prefix, &address->in_addr.in6, &address->prefixlen);
1434 if (r < 0)
e5526518 1435 return log_link_warning_errno(link, r, "Could not get RA prefix: %m");
bd6379ec
SS		 1436
1437 r = generate_ipv6_eui_64_address(link, &address->in_addr.in6);
1438 if (r < 0)
e5526518 1439 return log_link_warning_errno(link, r, "Could not generate EUI64 address: %m");
bd6379ec
SS		 1440
1441 address->family = AF_INET6;
e5526518 1442 r = static_address_configure(address, link, true);
bd6379ec 1443 if (r < 0)
e5526518 1444 return r;
bd6379ec
SS		 1445 }
1446
95b74ef6 1447 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1448 r = address_label_configure(label, link, NULL, false);
4ff296b0
YW		 1449 if (r < 0)
1450 return log_link_warning_errno(link, r, "Could not set address label: %m");
f5be5601 1451
7715629e 1452 link->address_label_messages++;
f882c247
TG		 1453 }
1454
e5526518 1455 /* now that we can figure out a default address for the dhcp server, start it */
708c425d 1456 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
8fcf1d61 1457 r = dhcp4_server_configure(link);
4ff296b0 1458 if (r < 0)
d4cdbea5 1459 return r;
6a7a4e4d 1460 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1461 }
1462
c42ff3a1
WKI		 1463 if (link->address_messages == 0) {
1464 link->addresses_configured = true;
e5526518
YW		 1465 link->addresses_ready = true;
1466 r = link_request_set_routes(link);
1467 if (r < 0)
1468 return r;
b425c3ae 1469 } else {
6a7a4e4d 1470 log_link_debug(link, "Setting addresses");
b425c3ae
YW		 1471 link_set_state(link, LINK_STATE_CONFIGURING);
1472 }
431ca2ce 1473
f882c247
TG		 1474 return 0;
1475}
1476
13b498f9 1477static int link_set_bridge_vlan(Link *link) {
86e2be7b 1478 int r;
13b498f9
TJ		 1479
1480 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1481 if (r < 0)
1482 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1483
1484 return r;
1485}
1486
a60a720c 1487static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1488 int r;
1489
1490 if (!link_proxy_arp_enabled(link))
1491 return 0;
1492
62e021a9 1493 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1494 if (r < 0)
1495 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1496
1497 return 0;
1498}
1499
3a390124 1500static int link_configure_continue(Link *link);
55dc8c4a 1501
302a796f 1502static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1503 int r;
1504
1505 assert(m);
1506 assert(link);
1507 assert(link->ifname);
1508
55dc8c4a
YW		 1509 link->setting_mtu = false;
1510
5da8149f 1511 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1512 return 1;
1513
1c4baffc 1514 r = sd_netlink_message_get_errno(m);
4ff296b0 1515 if (r < 0)
5ecb131d 1516 log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring");
4ff296b0
YW		 1517 else
1518 log_link_debug(link, "Setting MTU done.");
55dc8c4a 1519
4ff296b0 1520 if (link->state == LINK_STATE_INITIALIZED) {
3a390124 1521 r = link_configure_continue(link);
4ff296b0
YW		 1522 if (r < 0)
1523 link_enter_failed(link);
1524 }
4f882b2a
TG		 1525
1526 return 1;
1527}
1528
933c70a0 1529int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1530 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1531 int r;
1532
1533 assert(link);
1534 assert(link->manager);
1535 assert(link->manager->rtnl);
1536
40288ece
YW		 1537 if (mtu == 0 || link->setting_mtu)
1538 return 0;
1539
933c70a0 1540 if (link->mtu == mtu)
ee493106
YW		 1541 return 0;
1542
6a7a4e4d 1543 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1544
6a7a4e4d
LP		 1545 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1546 if (r < 0)
1547 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1548
44b598a1 1549 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1550 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1551 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1552
1553 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
d236718c 1554 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes");
44b598a1 1555
72c2500b 1556 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1557 }
1558
1c4baffc 1559 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1560 if (r < 0)
1561 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1562
302a796f
YW		 1563 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1564 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1565 if (r < 0)
1566 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1567
ae941762 1568 link_ref(link);
1046bf9b 1569 link->setting_mtu = true;
b226d99b 1570
4f882b2a
TG		 1571 return 0;
1572}
1573
f6fcc1c2
YW		 1574static bool link_reduces_vlan_mtu(Link *link) {
1575 /* See netif_reduces_vlan_mtu() in kernel. */
1576 return streq_ptr(link->kind, "macsec");
1577}
1578
1579static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1580 uint32_t mtu = 0;
1581 NetDev *dev;
f6fcc1c2 1582
90e74a66 1583 HASHMAP_FOREACH(dev, link->network->stacked_netdevs)
f6fcc1c2
YW		 1584 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1585 /* See vlan_dev_change_mtu() in kernel. */
1586 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1587
1588 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1589 /* See macvlan_change_mtu() in kernel. */
1590 mtu = dev->mtu;
1591
1592 return mtu;
1593}
1594
1595static int link_configure_mtu(Link *link) {
1596 uint32_t mtu;
1597
1598 assert(link);
1599 assert(link->network);
1600
1601 if (link->network->mtu > 0)
1602 return link_set_mtu(link, link->network->mtu);
1603
1604 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1605 if (link->mtu >= mtu)
1606 return 0;
1607
1608 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1609 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1610 link->mtu, mtu);
1611
1612 return link_set_mtu(link, mtu);
1613}
1614
302a796f 1615static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1616 int r;
1617
1618 assert(m);
1619 assert(link);
1620 assert(link->ifname);
1621
1622 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1623 return 1;
1624
1625 r = sd_netlink_message_get_errno(m);
1626 if (r < 0)
5ecb131d 1627 log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring");
99d2baa2
SS		 1628
1629 return 1;
1630}
1631
1632static int link_set_flags(Link *link) {
1633 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1634 unsigned ifi_change = 0;
1635 unsigned ifi_flags = 0;
1636 int r;
1637
1638 assert(link);
1639 assert(link->manager);
1640 assert(link->manager->rtnl);
1641
1642 if (link->flags & IFF_LOOPBACK)
1643 return 0;
1644
1645 if (!link->network)
1646 return 0;
1647
866e6b7a 1648 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1649 return 0;
1650
1651 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1652 if (r < 0)
1653 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1654
1655 if (link->network->arp >= 0) {
1656 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1657 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1658 }
1659
1660 if (link->network->multicast >= 0) {
1661 ifi_change |= IFF_MULTICAST;
1662 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1663 }
1664
866e6b7a
SS		 1665 if (link->network->allmulticast >= 0) {
1666 ifi_change |= IFF_ALLMULTI;
1667 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1668 }
1669
99d2baa2
SS		 1670 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1671 if (r < 0)
1672 return log_link_error_errno(link, r, "Could not set link flags: %m");
1673
302a796f
YW		 1674 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1675 link_netlink_destroy_callback, link);
99d2baa2
SS		 1676 if (r < 0)
1677 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1678
1679 link_ref(link);
1680
1681 return 0;
1682}
1683
e7ab854c
TG		 1684static int link_acquire_ipv6_conf(Link *link) {
1685 int r;
1686
1687 assert(link);
1688
e7ab854c 1689 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1690 assert(link->ndisc);
e7ab854c
TG		 1691
1692 log_link_debug(link, "Discovering IPv6 routers");
1693
1e7a0e21 1694 r = sd_ndisc_start(link->ndisc);
63348d13 1695 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1696 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1697 }
1698
7465dd22
PF		 1699 if (link_radv_enabled(link)) {
1700 assert(link->radv);
1701 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1702
1703 log_link_debug(link, "Starting IPv6 Router Advertisements");
1704
fd3ef936
YW		 1705 r = radv_emit_dns(link);
1706 if (r < 0)
1707 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
1708
7465dd22
PF		 1709 r = sd_radv_start(link->radv);
1710 if (r < 0 && r != -EBUSY)
1711 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1712 }
1713
838d39af
SS		 1714 if (link_dhcp6_enabled(link) && IN_SET(link->network->dhcp6_without_ra,
1715 DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST,
1716 DHCP6_CLIENT_START_MODE_SOLICIT)) {
cd305af1
SS		 1717 assert(link->dhcp6_client);
1718 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1719
838d39af 1720 r = dhcp6_request_address(link, link->network->dhcp6_without_ra == DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST);
cd305af1 1721 if (r < 0 && r != -EBUSY)
1633c457 1722 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
cd305af1
SS		 1723 else
1724 log_link_debug(link, "Acquiring DHCPv6 lease");
1725 }
1726
1633c457
YW		 1727 r = dhcp6_request_prefix_delegation(link);
1728 if (r < 0)
1729 return log_link_warning_errno(link, r, "Failed to request DHCPv6 prefix delegation: %m");
10752343 1730
e7ab854c
TG		 1731 return 0;
1732}
1733
6fc25497 1734static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1735 int r;
1736
1737 assert(link);
ff254138
TG		 1738 assert(link->manager);
1739 assert(link->manager->event);
1740
910feb78 1741 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1742 assert(link->ipv4ll);
ff254138 1743
6a7a4e4d 1744 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1745
1746 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1747 if (r < 0)
1748 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1749 }
1750
78c958f8 1751 if (link_dhcp4_enabled(link)) {
eb34d4af 1752 assert(link->dhcp_client);
ff254138 1753
6a7a4e4d 1754 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1755
5c1d3fc9 1756 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1757 if (r < 0)
1758 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1759 }
ff254138 1760
6fc25497
SS		 1761 return 0;
1762}
1763
1764static int link_acquire_conf(Link *link) {
1765 int r;
1766
1767 assert(link);
1768
1769 r = link_acquire_ipv4_conf(link);
1770 if (r < 0)
1771 return r;
1772
3f7cc080 1773 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1774 r = link_acquire_ipv6_conf(link);
1775 if (r < 0)
1776 return r;
1777 }
1778
7272b25e
LP		 1779 if (link_lldp_emit_enabled(link)) {
1780 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1781 if (r < 0)
1782 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1783 }
1784
ff254138
TG		 1785 return 0;
1786}
1787
a61bb41c 1788bool link_has_carrier(Link *link) {
deb2e523
TG		 1789 /* see Documentation/networking/operstates.txt in the kernel sources */
1790
a61bb41c 1791 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1792 return true;
1793
a61bb41c 1794 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1795 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1796 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1797 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1798 return true;
1799
1800 return false;
1801}
1802
0e2fdb83
SS		 1803static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1804 int r;
1805
1806 assert(link);
1807
9524014e
DS		 1808 link->setting_genmode = false;
1809
0e2fdb83
SS		 1810 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1811 return 1;
1812
1813 r = sd_netlink_message_get_errno(m);
1814 if (r < 0)
5ecb131d 1815 log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring");
9524014e
DS		 1816 else
1817 log_link_debug(link, "Setting address genmode done.");
1818
1819 if (link->state == LINK_STATE_INITIALIZED) {
1820 r = link_configure_continue(link);
1821 if (r < 0)
1822 link_enter_failed(link);
1823 }
0e2fdb83
SS		 1824
1825 return 1;
1826}
1827
1828static int link_configure_addrgen_mode(Link *link) {
1829 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1830 uint8_t ipv6ll_mode;
1831 int r;
1832
1833 assert(link);
1834 assert(link->network);
1835 assert(link->manager);
1836 assert(link->manager->rtnl);
1837
9524014e 1838 if (!socket_ipv6_is_supported() || link->setting_genmode)
9f6e82e6
YW		 1839 return 0;
1840
0e2fdb83
SS		 1841 log_link_debug(link, "Setting address genmode for link");
1842
1843 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1844 if (r < 0)
1845 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1846
1847 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1848 if (r < 0)
1849 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1850
1851 r = sd_netlink_message_open_container(req, AF_INET6);
1852 if (r < 0)
1853 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1854
1855 if (!link_ipv6ll_enabled(link))
1856 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
6f6296b9 1857 else if (link->network->ipv6ll_address_gen_mode < 0) {
a6f1848a
SS		 1858 r = sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL);
1859 if (r < 0) {
1860 /* The file may not exist. And even if it exists, when stable_secret is unset,
1861 * reading the file fails with EIO. */
1862 log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret: %m");
1863
1864 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1865 } else
1866 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1867 } else
6f6296b9 1868 ipv6ll_mode = link->network->ipv6ll_address_gen_mode;
0e2fdb83
SS		 1869
1870 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1871 if (r < 0)
1872 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1873
1874 r = sd_netlink_message_close_container(req);
1875 if (r < 0)
1876 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1877
1878 r = sd_netlink_message_close_container(req);
1879 if (r < 0)
1880 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1881
1882 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1883 link_netlink_destroy_callback, link);
1884 if (r < 0)
1885 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1886
1887 link_ref(link);
9524014e 1888 link->setting_genmode = true;
0e2fdb83
SS		 1889
1890 return 0;
1891}
1892
302a796f 1893static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1894 int r;
1895
1746cf2a
TG		 1896 assert(link);
1897
5da8149f 1898 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1899 return 1;
1900
1c4baffc 1901 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1902 if (r < 0)
26d6b214 1903 /* we warn but don't fail the link, as it may be brought up later */
5ecb131d 1904 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
45ad2c13 1905
f882c247
TG		 1906 return 1;
1907}
1908
1cc84f3b 1909static int link_up(Link *link) {
4afd3348 1910 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1911 int r;
1912
f882c247 1913 assert(link);
c106cc36 1914 assert(link->network);
f882c247
TG		 1915 assert(link->manager);
1916 assert(link->manager->rtnl);
1917
6a7a4e4d 1918 log_link_debug(link, "Bringing link up");
449f7554 1919
6a7a4e4d
LP		 1920 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1921 if (r < 0)
1922 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1923
2b2d8603 1924 /* set it free if not enslaved with networkd */
6cb955c6 1925 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1926 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1927 if (r < 0)
1928 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1929 }
1930
5d4795f3 1931 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1932 if (r < 0)
1933 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1934
c106cc36 1935 if (link->network->mac) {
1c4baffc 1936 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1937 if (r < 0)
1938 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1939 }
1940
302a796f
YW		 1941 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1942 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1943 if (r < 0)
1944 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1945
b226d99b
TG		 1946 link_ref(link);
1947
f882c247
TG		 1948 return 0;
1949}
1950
302a796f 1951static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1952 int r;
1953
1954 assert(link);
1955
1956 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1957 return 1;
1958
1c4baffc 1959 r = sd_netlink_message_get_errno(m);
0d4ad91d 1960 if (r < 0)
5ecb131d 1961 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
0d4ad91d
AR		 1962
1963 return 1;
1964}
1965
8e54db83 1966int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1967 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1968 int r;
1969
1970 assert(link);
1971 assert(link->manager);
1972 assert(link->manager->rtnl);
1973
6a7a4e4d 1974 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1975
1976 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1977 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1978 if (r < 0)
1979 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1980
1981 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1982 if (r < 0)
1983 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1984
8e54db83
YW		 1985 r = netlink_call_async(link->manager->rtnl, NULL, req,
1986 callback ?: link_down_handler,
302a796f 1987 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1988 if (r < 0)
1989 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1990
1991 link_ref(link);
1992
1993 return 0;
1994}
1995
89fe6535
SS		 1996static int link_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1997 int r;
1998
1999 assert(link);
2000
2001 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2002 return 1;
2003
2004 r = sd_netlink_message_get_errno(m);
2005 if (r < 0)
2006 log_link_message_warning_errno(link, m, r, "Could not set group for the interface");
2007
2008 return 1;
2009}
2010
2011static int link_set_group(Link *link) {
2012 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2013 int r;
2014
2015 assert(link);
2016 assert(link->network);
2017 assert(link->manager);
2018 assert(link->manager->rtnl);
2019
2020 if (link->network->group <= 0)
2021 return 0;
2022
2023 log_link_debug(link, "Setting group");
2024
2025 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
2026 if (r < 0)
2027 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
2028
2029 r = sd_netlink_message_append_u32(req, IFLA_GROUP, link->network->group);
2030 if (r < 0)
2031 return log_link_error_errno(link, r, "Could not set link group: %m");
2032
2033 r = netlink_call_async(link->manager->rtnl, NULL, req, link_group_handler,
2034 link_netlink_destroy_callback, link);
2035 if (r < 0)
2036 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
2037
2038 link_ref(link);
2039
2040 return 0;
2041}
2042
0d4ad91d
AR		 2043static int link_handle_bound_to_list(Link *link) {
2044 Link *l;
0d4ad91d
AR		 2045 int r;
2046 bool required_up = false;
2047 bool link_is_up = false;
2048
2049 assert(link);
2050
2051 if (hashmap_isempty(link->bound_to_links))
2052 return 0;
2053
2054 if (link->flags & IFF_UP)
2055 link_is_up = true;
2056
90e74a66 2057 HASHMAP_FOREACH (l, link->bound_to_links)
0d4ad91d
AR		 2058 if (link_has_carrier(l)) {
2059 required_up = true;
2060 break;
2061 }
2062
2063 if (!required_up && link_is_up) {
8e54db83 2064 r = link_down(link, NULL);
0d4ad91d
AR		 2065 if (r < 0)
2066 return r;
2067 } else if (required_up && !link_is_up) {
2068 r = link_up(link);
2069 if (r < 0)
2070 return r;
2071 }
2072
2073 return 0;
2074}
2075
2076static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 2077 Link *l;
2078 int r;
2079
2080 assert(link);
2081
2082 if (hashmap_isempty(link->bound_by_links))
2083 return 0;
2084
90e74a66 2085 HASHMAP_FOREACH (l, link->bound_by_links) {
0d4ad91d
AR		 2086 r = link_handle_bound_to_list(l);
2087 if (r < 0)
2088 return r;
2089 }
2090
2091 return 0;
2092}
2093
2094static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
2095 int r;
2096
2097 assert(link);
2098 assert(carrier);
2099
2100 if (link == carrier)
2101 return 0;
2102
2103 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
2104 return 0;
2105
2106 r = hashmap_ensure_allocated(h, NULL);
2107 if (r < 0)
2108 return r;
2109
2110 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
2111 if (r < 0)
2112 return r;
2113
2114 return 0;
2115}
2116
2117static int link_new_bound_by_list(Link *link) {
2118 Manager *m;
2119 Link *carrier;
0d4ad91d
AR		 2120 int r;
2121 bool list_updated = false;
2122
2123 assert(link);
2124 assert(link->manager);
2125
2126 m = link->manager;
2127
90e74a66 2128 HASHMAP_FOREACH(carrier, m->links) {
0d4ad91d
AR		 2129 if (!carrier->network)
2130 continue;
2131
2132 if (strv_isempty(carrier->network->bind_carrier))
2133 continue;
2134
191a3f16 2135 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 2136 r = link_put_carrier(link, carrier, &link->bound_by_links);
2137 if (r < 0)
2138 return r;
2139
2140 list_updated = true;
2141 }
2142 }
2143
2144 if (list_updated)
84de38c5 2145 link_dirty(link);
0d4ad91d 2146
90e74a66 2147 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 2148 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2149 if (r < 0)
2150 return r;
2151
84de38c5 2152 link_dirty(carrier);
0d4ad91d
AR		 2153 }
2154
2155 return 0;
2156}
2157
2158static int link_new_bound_to_list(Link *link) {
2159 Manager *m;
2160 Link *carrier;
0d4ad91d
AR		 2161 int r;
2162 bool list_updated = false;
2163
2164 assert(link);
2165 assert(link->manager);
2166
2167 if (!link->network)
2168 return 0;
2169
2170 if (strv_isempty(link->network->bind_carrier))
2171 return 0;
2172
2173 m = link->manager;
2174
90e74a66 2175 HASHMAP_FOREACH (carrier, m->links) {
191a3f16 2176 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 2177 r = link_put_carrier(link, carrier, &link->bound_to_links);
2178 if (r < 0)
2179 return r;
2180
2181 list_updated = true;
2182 }
2183 }
2184
2185 if (list_updated)
84de38c5 2186 link_dirty(link);
0d4ad91d 2187
90e74a66 2188 HASHMAP_FOREACH (carrier, link->bound_to_links) {
0d4ad91d
AR		 2189 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2190 if (r < 0)
2191 return r;
2192
84de38c5 2193 link_dirty(carrier);
0d4ad91d
AR		 2194 }
2195
2196 return 0;
2197}
2198
2199static int link_new_carrier_maps(Link *link) {
2200 int r;
2201
2202 r = link_new_bound_by_list(link);
2203 if (r < 0)
2204 return r;
2205
2206 r = link_handle_bound_by_list(link);
2207 if (r < 0)
2208 return r;
2209
2210 r = link_new_bound_to_list(link);
2211 if (r < 0)
2212 return r;
2213
2214 r = link_handle_bound_to_list(link);
2215 if (r < 0)
2216 return r;
2217
2218 return 0;
2219}
2220
2221static void link_free_bound_to_list(Link *link) {
2222 Link *bound_to;
0d4ad91d 2223
90e74a66 2224 HASHMAP_FOREACH (bound_to, link->bound_to_links) {
0d4ad91d
AR		 2225 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2226
2227 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2228 link_dirty(bound_to);
0d4ad91d
AR		 2229 }
2230
2231 return;
2232}
2233
2234static void link_free_bound_by_list(Link *link) {
2235 Link *bound_by;
0d4ad91d 2236
90e74a66 2237 HASHMAP_FOREACH (bound_by, link->bound_by_links) {
0d4ad91d
AR		 2238 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2239
2240 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2241 link_dirty(bound_by);
0d4ad91d
AR		 2242 link_handle_bound_to_list(bound_by);
2243 }
2244 }
2245
2246 return;
2247}
2248
2249static void link_free_carrier_maps(Link *link) {
2250 bool list_updated = false;
2251
2252 assert(link);
2253
2254 if (!hashmap_isempty(link->bound_to_links)) {
2255 link_free_bound_to_list(link);
2256 list_updated = true;
2257 }
2258
2259 if (!hashmap_isempty(link->bound_by_links)) {
2260 link_free_bound_by_list(link);
2261 list_updated = true;
2262 }
2263
2264 if (list_updated)
84de38c5 2265 link_dirty(link);
0d4ad91d
AR		 2266
2267 return;
2268}
2269
5f707e12
YW		 2270static int link_append_to_master(Link *link, NetDev *netdev) {
2271 Link *master;
2272 int r;
2273
2274 assert(link);
2275 assert(netdev);
2276
2277 r = link_get(link->manager, netdev->ifindex, &master);
2278 if (r < 0)
2279 return r;
2280
de7fef4b 2281 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 2282 if (r <= 0)
5f707e12
YW		 2283 return r;
2284
2285 link_ref(link);
2286 return 0;
2287}
2288
2289static void link_drop_from_master(Link *link, NetDev *netdev) {
2290 Link *master;
2291
2292 assert(link);
2293
2294 if (!link->manager || !netdev)
2295 return;
2296
2297 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2298 return;
2299
2300 link_unref(set_remove(master->slaves, link));
2301}
2302
2303static void link_detach_from_manager(Link *link) {
2304 if (!link || !link->manager)
2305 return;
2306
2307 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2308 link_clean(link);
2309
2310 /* The following must be called at last. */
2311 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2312 link_unref(link);
2313}
2314
0d4ad91d
AR		 2315void link_drop(Link *link) {
2316 if (!link || link->state == LINK_STATE_LINGER)
2317 return;
2318
2319 link_set_state(link, LINK_STATE_LINGER);
2320
2321 link_free_carrier_maps(link);
2322
5f707e12
YW		 2323 if (link->network) {
2324 link_drop_from_master(link, link->network->bridge);
2325 link_drop_from_master(link, link->network->bond);
2326 }
2327
6a7a4e4d 2328 log_link_debug(link, "Link removed");
0d4ad91d 2329
db2f8a2e 2330 (void) unlink(link->state_file);
c4397d94 2331 link_detach_from_manager(link);
0d4ad91d
AR		 2332}
2333
3f265037 2334static int link_joined(Link *link) {
f882c247
TG		 2335 int r;
2336
ef1ba606 2337 assert(link);
f5be5601 2338 assert(link->network);
dd3efc09 2339
0d4ad91d
AR		 2340 if (!hashmap_isempty(link->bound_to_links)) {
2341 r = link_handle_bound_to_list(link);
2342 if (r < 0)
2343 return r;
2344 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2345 r = link_up(link);
2346 if (r < 0) {
2347 link_enter_failed(link);
2348 return r;
2349 }
ef1ba606 2350 }
f882c247 2351
9ed794a3 2352 if (link->network->bridge) {
e1853b00 2353 r = link_set_bridge(link);
6a7a4e4d
LP		 2354 if (r < 0)
2355 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 2356
2357 r = link_append_to_master(link, link->network->bridge);
2358 if (r < 0)
2359 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 2360 }
2361
eb64b435 2362 if (link->network->bond) {
7fcee284 2363 r = link_set_bond(link);
eb64b435
SS		 2364 if (r < 0)
2365 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2366
45e11abf 2367 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2368 if (r < 0)
2369 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2370 }
2371
ffff9abe
TJ		 2372 if (link->network->use_br_vlan &&
2373 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2374 r = link_set_bridge_vlan(link);
2375 if (r < 0)
2376 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2377 }
2378
c1835a42
RM		 2379 /* Skip setting up addresses until it gets carrier,
2380 or it would try to set addresses twice,
2381 which is bad for non-idempotent steps. */
dad2d78e 2382 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2383 return 0;
2384
b425c3ae 2385 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 2386 return link_request_set_addresses(link);
02b59d57
TG		 2387}
2388
302a796f 2389static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2390 int r;
2391
1746cf2a 2392 assert(link);
ef1ba606 2393 assert(link->network);
34bf3c00 2394 assert(link->enslaving > 0);
02b59d57 2395
313cefa1 2396 link->enslaving--;
52433f6b 2397
5da8149f 2398 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2399 return 1;
2400
1c4baffc 2401 r = sd_netlink_message_get_errno(m);
856f962c 2402 if (r < 0 && r != -EEXIST) {
5ecb131d 2403 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG		 2404 link_enter_failed(link);
2405 return 1;
4ff296b0
YW		 2406 }
2407
2408 log_link_debug(link, "Joined netdev");
02b59d57 2409
34bf3c00 2410 if (link->enslaving == 0) {
4ff296b0
YW		 2411 r = link_joined(link);
2412 if (r < 0)
2413 link_enter_failed(link);
34bf3c00 2414 }
02b59d57
TG		 2415
2416 return 1;
2417}
2418
3f265037 2419static int link_enter_join_netdev(Link *link) {
6a0a2f86 2420 NetDev *netdev;
02b59d57
TG		 2421 int r;
2422
2423 assert(link);
2424 assert(link->network);
bd08ce56 2425 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2426
289e6774 2427 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2428
84de38c5 2429 link_dirty(link);
34bf3c00 2430 link->enslaving = 0;
02b59d57 2431
d9c67ea1 2432 if (link->network->bond) {
cbff7170
TJ		 2433 if (link->network->bond->state == NETDEV_STATE_READY &&
2434 link->network->bond->ifindex == link->master_ifindex)
2435 return link_joined(link);
2436
f2341e0a
LP		 2437 log_struct(LOG_DEBUG,
2438 LOG_LINK_INTERFACE(link),
2439 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2440 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2441
34bf3c00
YW		 2442 link->enslaving++;
2443
f2341e0a 2444 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2445 if (r < 0) {
f2341e0a
LP		 2446 log_struct_errno(LOG_WARNING, r,
2447 LOG_LINK_INTERFACE(link),
2448 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2449 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2450 link_enter_failed(link);
2451 return r;
2452 }
0ad6148e
MO		 2453 }
2454
d9c67ea1 2455 if (link->network->bridge) {
f2341e0a
LP		 2456 log_struct(LOG_DEBUG,
2457 LOG_LINK_INTERFACE(link),
2458 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2459 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2460
34bf3c00
YW		 2461 link->enslaving++;
2462
f2341e0a 2463 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2464 if (r < 0) {
f2341e0a
LP		 2465 log_struct_errno(LOG_WARNING, r,
2466 LOG_LINK_INTERFACE(link),
2467 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2468 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2469 link_enter_failed(link);
2470 return r;
2471 }
52433f6b
TG		 2472 }
2473
6cb955c6
AR		 2474 if (link->network->vrf) {
2475 log_struct(LOG_DEBUG,
2476 LOG_LINK_INTERFACE(link),
2477 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2478 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2479
34bf3c00
YW		 2480 link->enslaving++;
2481
6cb955c6
AR		 2482 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2483 if (r < 0) {
2484 log_struct_errno(LOG_WARNING, r,
2485 LOG_LINK_INTERFACE(link),
2486 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2487 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2488 link_enter_failed(link);
2489 return r;
2490 }
6cb955c6
AR		 2491 }
2492
90e74a66 2493 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7951dea2 2494
2b6db913
YW		 2495 if (netdev->ifindex > 0)
2496 /* Assume already enslaved. */
a63e5daa 2497 continue;
a63e5daa 2498
7033af49
YW		 2499 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2500 continue;
2501
f2341e0a
LP		 2502 log_struct(LOG_DEBUG,
2503 LOG_LINK_INTERFACE(link),
2504 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2505 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2506
34bf3c00
YW		 2507 link->enslaving++;
2508
f2341e0a 2509 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2510 if (r < 0) {
f2341e0a
LP		 2511 log_struct_errno(LOG_WARNING, r,
2512 LOG_LINK_INTERFACE(link),
2513 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2514 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2515 link_enter_failed(link);
2516 return r;
2517 }
326cb406
SS		 2518 }
2519
34bf3c00
YW		 2520 if (link->enslaving == 0)
2521 return link_joined(link);
2522
ef1ba606
TG		 2523 return 0;
2524}
2525
769d324c 2526static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2527 int r;
2528
765afd5c 2529 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2530 return 0;
2531
765afd5c
LP		 2532 /* We propagate the forwarding flag from one interface to the
2533 * global setting one way. This means: as long as at least one
2534 * interface was configured at any time that had IP forwarding
2535 * enabled the setting will stay on for good. We do this
2536 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2537 * somewhat in sync (see below). */
15dee3f0 2538
62e021a9 2539 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2540 if (r < 0)
765afd5c 2541 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2542
769d324c
LP		 2543 return 0;
2544}
2545
2546static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2547 int r;
2548
765afd5c 2549 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2550 return 0;
2551
61233823 2552 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2553 * packet forwarding setting: either packet forwarding is on
2554 * for all, or off for all. We hence don't bother with a
2555 * per-interface setting, but simply propagate the interface
2556 * flag, if it is set, to the global flag, one-way. Note that
2557 * while IPv4 would allow a per-interface flag, we expose the
2558 * same behaviour there and also propagate the setting from
2559 * one to all, to keep things simple (see above). */
15dee3f0 2560
62e021a9 2561 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2562 if (r < 0)
765afd5c 2563 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2564
2565 return 0;
2566}
2567
49092e22 2568static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2569 IPv6PrivacyExtensions s;
49092e22
SS		 2570 int r;
2571
1f0d9695 2572 s = link_ipv6_privacy_extensions(link);
66a6bd68 2573 if (s < 0)
49092e22
SS		 2574 return 0;
2575
62e021a9 2576 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2577 if (r < 0)
49092e22
SS		 2578 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2579
2580 return 0;
2581}
2582
4f2e437a 2583static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2584 int r;
2585
2586 /* Make this a NOP if IPv6 is not available */
2587 if (!socket_ipv6_is_supported())
2588 return 0;
2589
2590 if (link->flags & IFF_LOOPBACK)
2591 return 0;
2592
d68e2e59
LP		 2593 if (!link->network)
2594 return 0;
2595
62e021a9 2596 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2597 if (r < 0)
fe307276 2598 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2599
2600 return 0;
2601}
2602
8749cbcd 2603static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2604 int r;
2605
2606 /* Make this a NOP if IPv6 is not available */
2607 if (!socket_ipv6_is_supported())
2608 return 0;
2609
2610 if (link->flags & IFF_LOOPBACK)
2611 return 0;
2612
d68e2e59
LP		 2613 if (!link->network)
2614 return 0;
2615
8749cbcd
SS		 2616 if (link->network->ipv6_dad_transmits < 0)
2617 return 0;
2618
62e021a9 2619 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2620 if (r < 0)
8749cbcd 2621 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2622
2623 return 0;
2624}
2625
b69c3180 2626static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2627 int r;
2628
2629 /* Make this a NOP if IPv6 is not available */
2630 if (!socket_ipv6_is_supported())
2631 return 0;
2632
2633 if (link->flags & IFF_LOOPBACK)
2634 return 0;
2635
d68e2e59
LP		 2636 if (!link->network)
2637 return 0;
2638
b69c3180
SS		 2639 if (link->network->ipv6_hop_limit < 0)
2640 return 0;
2641
62e021a9 2642 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2643 if (r < 0)
b69c3180 2644 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2645
2646 return 0;
2647}
2648
11102cba 2649static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2650 int r;
2651
2652 /* Make this a NOP if IPv6 is not available */
2653 if (!socket_ipv6_is_supported())
2654 return 0;
2655
2656 if (link->flags & IFF_LOOPBACK)
2657 return 0;
2658
2659 if (link->network->ipv6_mtu == 0)
2660 return 0;
2661
d236718c
DS		 2662 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
2663 * on the interface. Bump up IPv6 MTU bytes to IPV6_MTU_MIN. */
2664 if (link->network->ipv6_mtu < IPV6_MIN_MTU) {
2665 log_link_notice(link, "Bumping IPv6 MTU to "STRINGIFY(IPV6_MIN_MTU)" byte minimum required");
2666 link->network->ipv6_mtu = IPV6_MIN_MTU;
2667 }
2668
62e021a9 2669 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
d236718c
DS		 2670 if (r < 0) {
2671 if (link->mtu < link->network->ipv6_mtu)
2672 log_link_warning(link, "Cannot set IPv6 MTU %"PRIu32" higher than device MTU %"PRIu32,
2673 link->network->ipv6_mtu, link->mtu);
2674 else
2675 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2676 }
2677
2678 link->ipv6_mtu_set = true;
11102cba
SS		 2679
2680 return 0;
2681}
2682
94d76d07
YW		 2683static int link_set_ipv4_accept_local(Link *link) {
2684 int r;
2685
2686 if (link->flags & IFF_LOOPBACK)
2687 return 0;
2688
2689 if (link->network->ipv4_accept_local < 0)
2690 return 0;
2691
2692 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "accept_local", link->network->ipv4_accept_local);
2693 if (r < 0)
2694 log_link_warning_errno(link, r, "Cannot set IPv4 accept_local flag for interface: %m");
2695
2696 return 0;
2697}
2698
30226d27
TJ		 2699static bool link_is_static_address_configured(Link *link, Address *address) {
2700 Address *net_address;
2701
2702 assert(link);
2703 assert(address);
2704
2705 if (!link->network)
2706 return false;
2707
2708 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2709 if (address_equal(net_address, address))
2710 return true;
6f5d73ab
YW		 2711 else if (address->family == AF_INET6 && net_address->family == AF_INET6 &&
2712 in_addr_equal(AF_INET6, &address->in_addr, &net_address->in_addr_peer) > 0)
2713 return true;
30226d27
TJ		 2714
2715 return false;
2716}
2717
d1bdafd2
WKI		 2718static bool link_is_neighbor_configured(Link *link, Neighbor *neighbor) {
2719 Neighbor *net_neighbor;
2720
2721 assert(link);
2722 assert(neighbor);
2723
2724 if (!link->network)
2725 return false;
2726
2727 LIST_FOREACH(neighbors, net_neighbor, link->network->neighbors)
2728 if (neighbor_equal(net_neighbor, neighbor))
2729 return true;
2730
2731 return false;
2732}
2733
7ecf0c3e
TJ		 2734static bool link_is_static_route_configured(Link *link, Route *route) {
2735 Route *net_route;
2736
2737 assert(link);
2738 assert(route);
2739
2740 if (!link->network)
2741 return false;
2742
2743 LIST_FOREACH(routes, net_route, link->network->static_routes)
2744 if (route_equal(net_route, route))
2745 return true;
2746
2747 return false;
2748}
2749
db51778f
YW		 2750static bool link_address_is_dynamic(Link *link, Address *address) {
2751 Route *route;
db51778f
YW		 2752
2753 assert(link);
2754 assert(address);
2755
2756 if (address->cinfo.ifa_prefered != CACHE_INFO_INFINITY_LIFE_TIME)
2757 return true;
2758
2759 /* Even when the address is leased from a DHCP server, networkd assign the address
2760 * without lifetime when KeepConfiguration=dhcp. So, let's check that we have
2761 * corresponding routes with RTPROT_DHCP. */
90e74a66 2762 SET_FOREACH(route, link->routes_foreign) {
db51778f
YW		 2763 if (route->protocol != RTPROT_DHCP)
2764 continue;
2765
2766 if (address->family != route->family)
2767 continue;
2768
2769 if (in_addr_equal(address->family, &address->in_addr, &route->prefsrc))
2770 return true;
2771 }
2772
2773 return false;
2774}
2775
0917a271
DS		 2776static int link_enumerate_ipv6_tentative_addresses(Link *link) {
2777 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
2778 sd_netlink_message *addr;
2779 int r;
2780
2781 assert(link);
2782 assert(link->manager);
2783 assert(link->manager->rtnl);
2784
2785 r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_GETADDR, 0, AF_INET6);
2786 if (r < 0)
2787 return r;
2788
2789 r = sd_netlink_call(link->manager->rtnl, req, 0, &reply);
2790 if (r < 0)
2791 return r;
2792
2793 for (addr = reply; addr; addr = sd_netlink_message_next(addr)) {
2794 unsigned char flags;
2795 int ifindex;
2796
2797 r = sd_rtnl_message_addr_get_ifindex(addr, &ifindex);
2798 if (r < 0) {
2799 log_link_warning_errno(link, r, "rtnl: invalid ifindex, ignoring: %m");
2800 continue;
2801 } else if (link->ifindex != ifindex)
2802 continue;
2803
2804 r = sd_rtnl_message_addr_get_flags(addr, &flags);
2805 if (r < 0) {
2806 log_link_warning_errno(link, r, "rtnl: received address message with invalid flags, ignoring: %m");
2807 continue;
2808 } else if (!(flags & IFA_F_TENTATIVE))
2809 continue;
2810
2811 log_link_debug(link, "Found tentative ipv6 link-local address");
2812 (void) manager_rtnl_process_address(link->manager->rtnl, addr, link->manager);
2813 }
2814
2815 return 0;
2816}
2817
5e5b137a
TG		 2818static int link_drop_foreign_config(Link *link) {
2819 Address *address;
d1bdafd2 2820 Neighbor *neighbor;
5e5b137a 2821 Route *route;
5e5b137a
TG		 2822 int r;
2823
0917a271
DS		 2824 /* The kernel doesn't notify us about tentative addresses;
2825 * so if ipv6ll is disabled, we need to enumerate them now so we can drop them below */
2826 if (!link_ipv6ll_enabled(link)) {
2827 r = link_enumerate_ipv6_tentative_addresses(link);
2828 if (r < 0)
2829 return r;
2830 }
2831
90e74a66 2832 SET_FOREACH(address, link->addresses_foreign) {
fe307276 2833 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2834 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
5e5b137a
TG		 2835 continue;
2836
db51778f 2837 if (link_address_is_dynamic(link, address)) {
b1b0b42e 2838 if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
db51778f 2839 continue;
b1b0b42e 2840 } else if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
db51778f
YW		 2841 continue;
2842
30226d27
TJ		 2843 if (link_is_static_address_configured(link, address)) {
2844 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2845 if (r < 0)
2846 return log_link_error_errno(link, r, "Failed to add address: %m");
2847 } else {
63ae0569 2848 r = address_remove(address, link, NULL);
30226d27
TJ		 2849 if (r < 0)
2850 return r;
2851 }
5e5b137a
TG		 2852 }
2853
90e74a66 2854 SET_FOREACH(neighbor, link->neighbors_foreign) {
d1bdafd2
WKI		 2855 if (link_is_neighbor_configured(link, neighbor)) {
2856 r = neighbor_add(link, neighbor->family, &neighbor->in_addr, &neighbor->lladdr, neighbor->lladdr_size, NULL);
2857 if (r < 0)
2858 return r;
2859 } else {
2860 r = neighbor_remove(neighbor, link, NULL);
2861 if (r < 0)
2862 return r;
2863 }
2864 }
2865
90e74a66 2866 SET_FOREACH(route, link->routes_foreign) {
fe307276 2867 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2868 if (route->protocol == RTPROT_KERNEL)
2869 continue;
2870
bd7d6cec
YW		 2871 /* do not touch multicast route added by kernel */
2872 /* FIXME: Why the kernel adds this route with protocol RTPROT_BOOT??? We need to investigate that.
2873 * https://tools.ietf.org/html/rfc4862#section-5.4 may explain why. */
2874 if (route->protocol == RTPROT_BOOT &&
2875 route->family == AF_INET6 &&
2876 route->dst_prefixlen == 8 &&
2877 in_addr_equal(AF_INET6, &route->dst, &(union in_addr_union) { .in6 = {{{ 0xff,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0 }}} }))
2878 continue;
2879
b1b0b42e 2880 if (route->protocol == RTPROT_STATIC && link->network &&
db51778f
YW		 2881 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2882 continue;
2883
b1b0b42e 2884 if (route->protocol == RTPROT_DHCP && link->network &&
db51778f
YW		 2885 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2886 continue;
2887
7ecf0c3e 2888 if (link_is_static_route_configured(link, route)) {
f1368755 2889 r = route_add(link, route, NULL);
7ecf0c3e
TJ		 2890 if (r < 0)
2891 return r;
2892 } else {
4645ad47 2893 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2894 if (r < 0)
2895 return r;
2896 }
5e5b137a
TG		 2897 }
2898
2899 return 0;
2900}
2901
9b966cee
YW		 2902static int remove_static_address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2903 int r;
2904
2905 assert(m);
2906 assert(link);
2907 assert(link->ifname);
2908 assert(link->address_remove_messages > 0);
2909
2910 link->address_remove_messages--;
2911
2912 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2913 return 1;
2914
2915 r = sd_netlink_message_get_errno(m);
2916 if (r < 0 && r != -EADDRNOTAVAIL)
2917 log_link_message_warning_errno(link, m, r, "Could not drop address");
2918 else if (r >= 0)
2919 (void) manager_rtnl_process_address(rtnl, m, link->manager);
2920
2921 if (link->address_remove_messages == 0 && link->request_static_addresses) {
2922 link_set_state(link, LINK_STATE_CONFIGURING);
2923 r = link_request_set_addresses(link);
2924 if (r < 0)
2925 link_enter_failed(link);
2926 }
2927
2928 return 1;
2929}
2930
3104883d 2931static int link_drop_config(Link *link) {
410a7f15 2932 Address *address, *pool_address;
d1bdafd2 2933 Neighbor *neighbor;
3104883d 2934 Route *route;
3104883d
SS		 2935 int r;
2936
90e74a66 2937 SET_FOREACH(address, link->addresses) {
3104883d 2938 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2939 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
3104883d
SS		 2940 continue;
2941
9b966cee 2942 r = address_remove(address, link, remove_static_address_handler);
3104883d
SS		 2943 if (r < 0)
2944 return r;
410a7f15 2945
9b966cee
YW		 2946 link->address_remove_messages++;
2947
410a7f15 2948 /* If this address came from an address pool, clean up the pool */
b6766fb1 2949 LIST_FOREACH(addresses, pool_address, link->pool_addresses)
410a7f15
RM		 2950 if (address_equal(address, pool_address)) {
2951 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2952 address_free(pool_address);
2953 break;
2954 }
3104883d
SS		 2955 }
2956
90e74a66 2957 SET_FOREACH(neighbor, link->neighbors) {
d1bdafd2
WKI		 2958 r = neighbor_remove(neighbor, link, NULL);
2959 if (r < 0)
2960 return r;
2961 }
2962
90e74a66 2963 SET_FOREACH(route, link->routes) {
3104883d
SS		 2964 /* do not touch routes managed by the kernel */
2965 if (route->protocol == RTPROT_KERNEL)
2966 continue;
2967
4645ad47 2968 r = route_remove(route, link, NULL);
3104883d
SS		 2969 if (r < 0)
2970 return r;
2971 }
2972
c69305ff
LP		 2973 ndisc_flush(link);
2974
3104883d
SS		 2975 return 0;
2976}
2977
051e77ca
SS		 2978static int link_configure_ipv4_dad(Link *link) {
2979 Address *address;
2980 int r;
2981
2982 assert(link);
2983 assert(link->network);
2984
2985 LIST_FOREACH(addresses, address, link->network->static_addresses)
2986 if (address->family == AF_INET &&
2987 FLAGS_SET(address->duplicate_address_detection, ADDRESS_FAMILY_IPV4)) {
2988 r = configure_ipv4_duplicate_address_detection(link, address);
2989 if (r < 0)
2990 return log_link_error_errno(link, r, "Failed to configure IPv4ACD: %m");
2991 }
2992
2993 return 0;
2994}
2995
34658df2
YW		 2996static int link_configure_traffic_control(Link *link) {
2997 TrafficControl *tc;
02b59d57
TG		 2998 int r;
2999
34658df2
YW		 3000 link->tc_configured = false;
3001 link->tc_messages = 0;
4ecdcb07 3002
90e74a66 3003 ORDERED_HASHMAP_FOREACH(tc, link->network->tc_by_section) {
34658df2 3004 r = traffic_control_configure(link, tc);
4ecdcb07
YW		 3005 if (r < 0)
3006 return r;
3007 }
3008
34658df2
YW		 3009 if (link->tc_messages == 0)
3010 link->tc_configured = true;
4ecdcb07 3011 else
34658df2 3012 log_link_debug(link, "Configuring traffic control");
4ecdcb07
YW		 3013
3014 return 0;
3015}
3016
518cd6b5
SS		 3017static int link_configure_sr_iov(Link *link) {
3018 SRIOV *sr_iov;
518cd6b5
SS		 3019 int r;
3020
3021 link->sr_iov_configured = false;
3022 link->sr_iov_messages = 0;
3023
90e74a66 3024 ORDERED_HASHMAP_FOREACH(sr_iov, link->network->sr_iov_by_section) {
518cd6b5
SS		 3025 r = sr_iov_configure(link, sr_iov);
3026 if (r < 0)
3027 return r;
3028 }
3029
3030 if (link->sr_iov_messages == 0)
3031 link->sr_iov_configured = true;
3032 else
3033 log_link_debug(link, "Configuring SR-IOV");
3034
3035 return 0;
3036}
3037
4ecdcb07
YW		 3038static int link_configure(Link *link) {
3039 int r;
3040
ef1ba606 3041 assert(link);
b22d8a00 3042 assert(link->network);
bd08ce56 3043 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 3044
34658df2 3045 r = link_configure_traffic_control(link);
4ecdcb07
YW		 3046 if (r < 0)
3047 return r;
3048
518cd6b5
SS		 3049 r = link_configure_sr_iov(link);
3050 if (r < 0)
3051 return r;
3052
500b96eb 3053 if (link->iftype == ARPHRD_CAN)
93ea7750 3054 return link_configure_can(link);
92c918b0 3055
482efedc
SS		 3056 /* If IPv6 configured that is static IPv6 address and IPv6LL autoconfiguration is enabled
3057 * for this interface, then enable IPv6 */
57ad7607 3058 (void) link_update_ipv6_sysctl(link);
482efedc 3059
23d8b221
SS		 3060 r = link_set_proxy_arp(link);
3061 if (r < 0)
3062 return r;
3063
a0e5c15d
FK		 3064 r = ipv6_proxy_ndp_addresses_configure(link);
3065 if (r < 0)
3066 return r;
3067
769d324c
LP		 3068 r = link_set_ipv4_forward(link);
3069 if (r < 0)
3070 return r;
3071
3072 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 3073 if (r < 0)
3074 return r;
3075
49092e22
SS		 3076 r = link_set_ipv6_privacy_extensions(link);
3077 if (r < 0)
3078 return r;
3079
4f2e437a
SS		 3080 r = link_set_ipv6_accept_ra(link);
3081 if (r < 0)
3082 return r;
3083
8749cbcd
SS		 3084 r = link_set_ipv6_dad_transmits(link);
3085 if (r < 0)
3086 return r;
b69c3180
SS		 3087
3088 r = link_set_ipv6_hop_limit(link);
3089 if (r < 0)
3090 return r;
8749cbcd 3091
94d76d07
YW		 3092 r = link_set_ipv4_accept_local(link);
3093 if (r < 0)
3094 return r;
3095
99d2baa2
SS		 3096 r = link_set_flags(link);
3097 if (r < 0)
3098 return r;
3099
89fe6535
SS		 3100 r = link_set_group(link);
3101 if (r < 0)
3102 return r;
3103
910feb78 3104 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
b22d8a00 3105 r = ipv4ll_configure(link);
eb34d4af
TG		 3106 if (r < 0)
3107 return r;
3108 }
3109
78c958f8 3110 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 3111 r = dhcp4_set_promote_secondaries(link);
3112 if (r < 0)
3113 return r;
3114
3c9b8860 3115 r = dhcp4_configure(link);
eb34d4af
TG		 3116 if (r < 0)
3117 return r;
eb34d4af
TG		 3118 }
3119
78c958f8 3120 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 3121 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
3122 if (r < 0)
3123 return r;
3124
3125 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
3126 if (r < 0)
3127 return r;
dd43110f
TG		 3128 }
3129
62379e88
TG		 3130 if (link_dhcp6_enabled(link) ||
3131 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 3132 r = dhcp6_configure(link);
3133 if (r < 0)
3134 return r;
3135 }
3136
3137 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 3138 r = ndisc_configure(link);
4138fb2c
PF		 3139 if (r < 0)
3140 return r;
3141 }
3142
7465dd22
PF		 3143 if (link_radv_enabled(link)) {
3144 r = radv_configure(link);
3145 if (r < 0)
3146 return r;
3147 }
3148
8e1ad1ea 3149 if (link_lldp_rx_enabled(link)) {
7f853950 3150 r = link_lldp_rx_configure(link);
273eec24
LP		 3151 if (r < 0)
3152 return r;
ce43e484
SS		 3153 }
3154
f6fcc1c2 3155 r = link_configure_mtu(link);
40288ece
YW		 3156 if (r < 0)
3157 return r;
44b598a1 3158
9f6e82e6
YW		 3159 r = link_configure_addrgen_mode(link);
3160 if (r < 0)
3161 return r;
0e2fdb83 3162
051e77ca
SS		 3163 r = link_configure_ipv4_dad(link);
3164 if (r < 0)
3165 return r;
3166
3a390124
DS		 3167 return link_configure_continue(link);
3168}
3169
3170/* The configuration continues in this separate function, instead of
3171 * including this in the above link_configure() function, for two
3172 * reasons:
3173 * 1) some devices reset the link when the mtu is set, which caused
3174 * an infinite loop here in networkd; see:
3175 * https://github.com/systemd/systemd/issues/6593
3176 * https://github.com/systemd/systemd/issues/9831
3177 * 2) if ipv6ll is disabled, then bringing the interface up must be
3178 * delayed until after we get confirmation from the kernel that
3179 * the addr_gen_mode parameter has been set (via netlink), see:
3180 * https://github.com/systemd/systemd/issues/13882
3181 */
3182static int link_configure_continue(Link *link) {
55dc8c4a
YW		 3183 int r;
3184
3185 assert(link);
3186 assert(link->network);
bd08ce56 3187 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a 3188
9524014e 3189 if (link->setting_mtu || link->setting_genmode)
55dc8c4a
YW		 3190 return 0;
3191
4c649652
DS		 3192 /* Drop foreign config, but ignore loopback or critical devices.
3193 * We do not want to remove loopback address or addresses used for root NFS. */
3194 if (!(link->flags & IFF_LOOPBACK) &&
3195 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
3196 r = link_drop_foreign_config(link);
3197 if (r < 0)
3198 return r;
3199 }
3200
d236718c
DS		 3201 /* The kernel resets ipv6 mtu after changing device mtu;
3202 * we must set this here, after we've set device mtu */
3203 r = link_set_ipv6_mtu(link);
3204 if (r < 0)
3205 return r;
3206
dad2d78e 3207 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 3208 r = link_acquire_conf(link);
3209 if (r < 0)
3210 return r;
cc544d5f 3211 }
1e9be60b 3212
3f265037 3213 return link_enter_join_netdev(link);
505f8da7
TG		 3214}
3215
27dfc982
YW		 3216static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
3217 assert(duid);
3218
3219 if (duid->raw_data_len > 0)
3220 return 0;
3221
3222 if (duid->type != DUID_TYPE_UUID)
3223 return -EINVAL;
3224
3225 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
3226 duid->raw_data_len = sizeof(sd_id128_t);
3227
3228 return 1;
3229}
3230
3231int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
3232 Manager *manager = userdata;
3233 const sd_bus_error *e;
3234 const void *a;
3235 size_t sz;
3236 DUID *duid;
3237 Link *link;
3238 int r;
3239
3240 assert(m);
3241 assert(manager);
3242
3243 e = sd_bus_message_get_error(m);
3244 if (e) {
3245 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 3246 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 3247 e->message);
3248 goto configure;
3249 }
3250
3251 r = sd_bus_message_read_array(m, 'y', &a, &sz);
3252 if (r < 0)
3253 goto configure;
3254
3255 if (sz != sizeof(sd_id128_t)) {
ab4dd984 3256 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 3257 goto configure;
3258 }
3259
3260 memcpy(&manager->product_uuid, a, sz);
3261 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
3262 (void) duid_set_uuid(duid, manager->product_uuid);
3263
3264 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
3265
3266configure:
3267 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3dc2e7af
YW		 3268 link_unref(link);
3269
27dfc982
YW		 3270 r = link_configure(link);
3271 if (r < 0)
4ff296b0 3272 link_enter_failed(link);
27dfc982
YW		 3273 }
3274
3275 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
3276
3277 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
3278 * even if the method fails. */
3279 manager->has_product_uuid = true;
3280
3281 return 1;
3282}
3283
3284static bool link_requires_uuid(Link *link) {
3285 const DUID *duid;
3286
3287 assert(link);
3288 assert(link->manager);
3289 assert(link->network);
3290
3291 duid = link_get_duid(link);
3292 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
3293 return false;
3294
3295 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
3296 return true;
3297
3298 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
3299 return true;
3300
3301 return false;
3302}
3303
3304static int link_configure_duid(Link *link) {
3305 Manager *m;
3306 DUID *duid;
3307 int r;
3308
3309 assert(link);
3310 assert(link->manager);
3311 assert(link->network);
3312
3313 m = link->manager;
3314 duid = link_get_duid(link);
3315
3316 if (!link_requires_uuid(link))
3317 return 1;
3318
3319 if (m->has_product_uuid) {
3320 (void) duid_set_uuid(duid, m->product_uuid);
3321 return 1;
3322 }
3323
3324 if (!m->links_requesting_uuid) {
3325 r = manager_request_product_uuid(m, link);
3326 if (r < 0) {
3327 if (r == -ENOMEM)
3328 return r;
3329
ab4dd984
ZJS		 3330 log_link_warning_errno(link, r,
3331 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 3332 return 1;
3333 }
3334 } else {
3335 r = set_put(m->links_requesting_uuid, link);
3336 if (r < 0)
3337 return log_oom();
39dbd0c7
ZJS		 3338 if (r > 0)
3339 link_ref(link);
27dfc982
YW		 3340
3341 r = set_put(m->duids_requesting_uuid, duid);
3342 if (r < 0)
3343 return log_oom();
3344 }
3345
3346 return 0;
3347}
3348
572b21d9 3349static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
ad932b15
YW		 3350 Network *network;
3351 int r;
3352
572b21d9
YW		 3353 if (m) {
3354 _cleanup_strv_free_ char **s = NULL;
3355
3356 r = sd_netlink_message_get_errno(m);
3357 if (r < 0)
3358 return r;
3359
3360 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3361 if (r < 0 && r != -ENODATA)
3362 return r;
3363
3364 strv_free_and_replace(link->alternative_names, s);
3365 }
3366
c643bda5
YW		 3367 r = network_get(link->manager, link->iftype, link->sd_device,
3368 link->ifname, link->alternative_names, link->driver,
3369 &link->mac, &link->permanent_mac,
3370 link->wlan_iftype, link->ssid, &link->bssid, &network);
ad932b15
YW		 3371 if (r == -ENOENT) {
3372 link_enter_unmanaged(link);
3373 return 0;
3374 } else if (r == 0 && network->unmanaged) {
3375 link_enter_unmanaged(link);
3376 return 0;
3377 } else if (r < 0)
3378 return r;
3379
99b8517c 3380 if (link->network == network && !force)
ad932b15
YW		 3381 return 0;
3382
3383 log_link_info(link, "Re-configuring with %s", network->filename);
3384
3385 /* Dropping old .network file */
3386 r = link_stop_clients(link, false);
572b21d9 3387 if (r < 0)
ad932b15 3388 return r;
ad932b15
YW		 3389
3390 if (link_dhcp4_server_enabled(link))
3391 (void) sd_dhcp_server_stop(link->dhcp_server);
3392
3393 r = link_drop_config(link);
3394 if (r < 0)
3395 return r;
3396
2c7b826d 3397 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
ad932b15
YW		 3398 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
3399 r = link_drop_foreign_config(link);
3400 if (r < 0)
3401 return r;
3402 }
3403
3404 link_free_carrier_maps(link);
3405 link_free_engines(link);
3406 link->network = network_unref(link->network);
3407
3408 /* Then, apply new .network file */
3409 r = network_apply(network, link);
3410 if (r < 0)
3411 return r;
3412
3413 r = link_new_carrier_maps(link);
3414 if (r < 0)
3415 return r;
3416
3417 link_set_state(link, LINK_STATE_INITIALIZED);
8ae7b8a1 3418 link_dirty(link);
ad932b15
YW		 3419
3420 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3421 * link_configure() is called later asynchronously. */
3422 r = link_configure_duid(link);
3423 if (r <= 0)
3424 return r;
3425
3426 r = link_configure(link);
3427 if (r < 0)
3428 return r;
3429
3430 return 0;
3431}
3432
572b21d9
YW		 3433static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3434 int r;
3435
3436 r = link_reconfigure_internal(link, m, false);
3437 if (r < 0)
3438 link_enter_failed(link);
3439
3440 return 1;
3441}
3442
3443static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3444 int r;
3445
3446 r = link_reconfigure_internal(link, m, true);
3447 if (r < 0)
3448 link_enter_failed(link);
3449
3450 return 1;
3451}
3452
3453int link_reconfigure(Link *link, bool force) {
3454 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
3455 int r;
3456
2c0d7ed3
YW		 3457 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
3458 return 0;
3459
572b21d9
YW		 3460 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3461 link->ifindex);
3462 if (r < 0)
3463 return r;
3464
3465 r = netlink_call_async(link->manager->rtnl, NULL, req,
3466 force ? link_force_reconfigure_handler : link_reconfigure_handler,
3467 link_netlink_destroy_callback, link);
3468 if (r < 0)
3469 return r;
3470
3471 link_ref(link);
3472
3473 return 0;
3474}
3475
e6bf7774 3476static int link_initialized_and_synced(Link *link) {
505f8da7 3477 Network *network;
505f8da7
TG		 3478 int r;
3479
3480 assert(link);
3481 assert(link->ifname);
3482 assert(link->manager);
3483
bd08ce56
YW		 3484 /* We may get called either from the asynchronous netlink callback,
3485 * or directly for link_add() if running in a container. See link_add(). */
3486 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 3487 return 0;
505f8da7 3488
6a7a4e4d 3489 log_link_debug(link, "Link state is up-to-date");
bd08ce56 3490 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 3491
0d4ad91d
AR		 3492 r = link_new_bound_by_list(link);
3493 if (r < 0)
3494 return r;
3495
3496 r = link_handle_bound_by_list(link);
3497 if (r < 0)
3498 return r;
3499
c4a03a56 3500 if (!link->network) {
0894cfe4 3501 r = wifi_get_info(link);
8d968fdd
YW		 3502 if (r < 0)
3503 return r;
3504
c643bda5
YW		 3505 r = network_get(link->manager, link->iftype, link->sd_device,
3506 link->ifname, link->alternative_names, link->driver,
3507 &link->mac, &link->permanent_mac,
3508 link->wlan_iftype, link->ssid, &link->bssid, &network);
c4a03a56
TG		 3509 if (r == -ENOENT) {
3510 link_enter_unmanaged(link);
4232cf04 3511 return 0;
a09dc546
DM		 3512 } else if (r == 0 && network->unmanaged) {
3513 link_enter_unmanaged(link);
3514 return 0;
c4a03a56
TG		 3515 } else if (r < 0)
3516 return r;
505f8da7 3517
c4a03a56
TG		 3518 if (link->flags & IFF_LOOPBACK) {
3519 if (network->link_local != ADDRESS_FAMILY_NO)
3520 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3521
c4a03a56
TG		 3522 if (network->dhcp != ADDRESS_FAMILY_NO)
3523 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3524
c4a03a56
TG		 3525 if (network->dhcp_server)
3526 log_link_debug(link, "Ignoring DHCP server for loopback link");
3527 }
bd2efe92 3528
7d342c03 3529 r = network_apply(network, link);
c4a03a56
TG		 3530 if (r < 0)
3531 return r;
3532 }
505f8da7 3533
0d4ad91d
AR		 3534 r = link_new_bound_to_list(link);
3535 if (r < 0)
3536 return r;
3537
27dfc982
YW		 3538 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3539 * link_configure() is called later asynchronously. */
3540 r = link_configure_duid(link);
3541 if (r <= 0)
3542 return r;
3543
a748b692
TG		 3544 r = link_configure(link);
3545 if (r < 0)
3546 return r;
3547
4232cf04 3548 return 0;
505f8da7
TG		 3549}
3550
302a796f 3551static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
572b21d9 3552 _cleanup_strv_free_ char **s = NULL;
4ff296b0
YW		 3553 int r;
3554
572b21d9
YW		 3555 r = sd_netlink_message_get_errno(m);
3556 if (r < 0) {
40681e5c 3557 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 3558 link_enter_failed(link);
3559 return 0;
3560 }
3561
3562 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3563 if (r < 0 && r != -ENODATA) {
3564 link_enter_failed(link);
3565 return 0;
3566 }
3567
3568 strv_free_and_replace(link->alternative_names, s);
3569
4ff296b0
YW		 3570 r = link_initialized_and_synced(link);
3571 if (r < 0)
3572 link_enter_failed(link);
e6bf7774
YW		 3573 return 1;
3574}
3575
51517f9e 3576int link_initialized(Link *link, sd_device *device) {
4afd3348 3577 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3578 int r;
3579
3580 assert(link);
3581 assert(link->manager);
3582 assert(link->manager->rtnl);
3583 assert(device);
3584
8434fd5c 3585 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3586 return 0;
3587
51517f9e 3588 if (link->sd_device)
679b3605
TG		 3589 return 0;
3590
79008bdd 3591 log_link_debug(link, "udev initialized link");
bd08ce56 3592 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 3593
51517f9e 3594 link->sd_device = sd_device_ref(device);
4f561e8e 3595
3c9b8860
TG		 3596 /* udev has initialized the link, but we don't know if we have yet
3597 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3598 * when it returns we know that the pending NEWLINKs have already been
3599 * processed and that we are up-to-date */
4f561e8e 3600
3c9b8860
TG		 3601 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3602 link->ifindex);
4f561e8e
TG		 3603 if (r < 0)
3604 return r;
3605
302a796f
YW		 3606 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3607 link_netlink_destroy_callback, link);
4f561e8e
TG		 3608 if (r < 0)
3609 return r;
3610
5da8149f
TG		 3611 link_ref(link);
3612
4f561e8e
TG		 3613 return 0;
3614}
3615
c4a03a56 3616static int link_load(Link *link) {
0bc70f1d
TG		 3617 _cleanup_free_ char *network_file = NULL,
3618 *addresses = NULL,
f703cc2c 3619 *routes = NULL,
0bc70f1d
TG		 3620 *dhcp4_address = NULL,
3621 *ipv4ll_address = NULL;
3622 union in_addr_union address;
c4a03a56
TG		 3623 int r;
3624
3625 assert(link);
3626
aa8fbc74 3627 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3628 "NETWORK_FILE", &network_file,
3629 "ADDRESSES", &addresses,
f703cc2c 3630 "ROUTES", &routes,
0bc70f1d 3631 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3632 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3633 if (r < 0 && r != -ENOENT)
3634 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3635
3636 if (network_file) {
3637 Network *network;
3638 char *suffix;
3639
3640 /* drop suffix */
3641 suffix = strrchr(network_file, '.');
3642 if (!suffix) {
3643 log_link_debug(link, "Failed to get network name from %s", network_file);
3644 goto network_file_fail;
3645 }
3646 *suffix = '\0';
3647
3648 r = network_get_by_name(link->manager, basename(network_file), &network);
3649 if (r < 0) {
3650 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3651 goto network_file_fail;
3652 }
3653
7d342c03 3654 r = network_apply(network, link);
c4a03a56
TG		 3655 if (r < 0)
3656 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3657 }
3658
3659network_file_fail:
3660
1f68f772
ZJS		 3661 for (const char *p = addresses; p; ) {
3662 _cleanup_free_ char *address_str = NULL;
3663 char *prefixlen_str;
3664 int family;
3665 unsigned char prefixlen;
c4a03a56 3666
1f68f772
ZJS		 3667 r = extract_first_word(&p, &address_str, NULL, 0);
3668 if (r < 0)
3669 log_link_warning_errno(link, r, "failed to parse ADDRESSES: %m");
3670 if (r <= 0)
3671 break;
c4a03a56 3672
1f68f772
ZJS		 3673 prefixlen_str = strchr(address_str, '/');
3674 if (!prefixlen_str) {
3675 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
3676 continue;
3677 }
3678 *prefixlen_str++ = '\0';
c4a03a56 3679
1f68f772
ZJS		 3680 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3681 if (r != 1) {
3682 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3683 continue;
3684 }
c4a03a56 3685
1f68f772
ZJS		 3686 r = in_addr_from_string_auto(address_str, &family, &address);
3687 if (r < 0) {
3688 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
3689 continue;
c4a03a56 3690 }
c4a03a56 3691
1f68f772
ZJS		 3692 r = address_add(link, family, &address, prefixlen, NULL);
3693 if (r < 0)
3694 return log_link_error_errno(link, r, "Failed to add address: %m");
3695 }
74544b4e 3696
1f68f772
ZJS		 3697 for (const char *p = routes; p; ) {
3698 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
3699 _cleanup_(route_freep) Route *tmp = NULL;
3700 _cleanup_free_ char *route_str = NULL;
3701 char *prefixlen_str;
3702 Route *route;
f703cc2c 3703
1f68f772
ZJS		 3704 r = extract_first_word(&p, &route_str, NULL, 0);
3705 if (r < 0)
3706 log_link_debug_errno(link, r, "failed to parse ROUTES: %m");
3707 if (r <= 0)
3708 break;
c598ac76 3709
1f68f772
ZJS		 3710 prefixlen_str = strchr(route_str, '/');
3711 if (!prefixlen_str) {
3712 log_link_debug(link, "Failed to parse route %s", route_str);
3713 continue;
3714 }
3715 *prefixlen_str++ = '\0';
f703cc2c 3716
1f68f772
ZJS		 3717 r = route_new(&tmp);
3718 if (r < 0)
3719 return log_oom();
f703cc2c 3720
1f68f772
ZJS		 3721 r = sscanf(prefixlen_str,
3722 "%hhu/%hhu/%"SCNu32"/%"PRIu32"/"USEC_FMT,
3723 &tmp->dst_prefixlen,
3724 &tmp->tos,
3725 &tmp->priority,
3726 &tmp->table,
3727 &tmp->lifetime);
3728 if (r != 5) {
3729 log_link_debug(link,
3730 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3731 prefixlen_str);
3732 continue;
3733 }
f1368755 3734
1f68f772
ZJS		 3735 r = in_addr_from_string_auto(route_str, &tmp->family, &tmp->dst);
3736 if (r < 0) {
3737 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
3738 continue;
3739 }
f703cc2c 3740
1f68f772
ZJS		 3741 r = route_add(link, tmp, &route);
3742 if (r < 0)
3743 return log_link_error_errno(link, r, "Failed to add route: %m");
f703cc2c 3744
1f68f772
ZJS		 3745 if (route->lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
3746 r = sd_event_add_time(link->manager->event, &expire,
3747 clock_boottime_or_monotonic(),
3748 route->lifetime, 0, route_expire_handler, route);
f703cc2c 3749 if (r < 0)
1f68f772 3750 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
f703cc2c 3751 }
1f68f772
ZJS		 3752
3753 sd_event_source_unref(route->expire);
3754 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3755 }
3756
0bc70f1d
TG		 3757 if (dhcp4_address) {
3758 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3759 if (r < 0) {
b68d26b8 3760 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3761 goto dhcp4_address_fail;
3762 }
3763
b1c626f6 3764 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3765 if (r < 0)
b68d26b8 3766 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d 3767
1b43e246
DS		 3768 r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0);
3769 if (r < 0)
3770 return log_link_error_errno(link, r, "Failed to attach DHCPv4 event: %m");
3771
0bc70f1d
TG		 3772 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3773 if (r < 0)
b68d26b8 3774 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3775 }
3776
3777dhcp4_address_fail:
3778
3779 if (ipv4ll_address) {
3780 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3781 if (r < 0) {
b68d26b8 3782 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3783 goto ipv4ll_address_fail;
3784 }
3785
3786 r = sd_ipv4ll_new(&link->ipv4ll);
3787 if (r < 0)
b68d26b8 3788 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d 3789
1b43e246
DS		 3790 r = sd_ipv4ll_attach_event(link->ipv4ll, NULL, 0);
3791 if (r < 0)
3792 return log_link_error_errno(link, r, "Failed to attach IPv4LL event: %m");
3793
0bc70f1d
TG		 3794 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3795 if (r < 0)
b68d26b8 3796 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3797 }
3798
3799ipv4ll_address_fail:
3800
c4a03a56
TG		 3801 return 0;
3802}
3803
1c4baffc 3804int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3805 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3806 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3807 Link *link;
5a937ea2 3808 int r;
505f8da7
TG		 3809
3810 assert(m);
fbbeb65a 3811 assert(m->rtnl);
505f8da7
TG		 3812 assert(message);
3813 assert(ret);
3814
3815 r = link_new(m, message, ret);
3816 if (r < 0)
3817 return r;
3818
3819 link = *ret;
3820
6a7a4e4d 3821 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3822
c4a03a56
TG		 3823 r = link_load(link);
3824 if (r < 0)
3825 return r;
3826
bf331d87
YW		 3827 if (path_is_read_only_fs("/sys") <= 0) {
3828 /* udev should be around */
ae06ab10 3829 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3830 r = sd_device_new_from_device_id(&device, ifindex_str);
3831 if (r < 0) {
4d59e14f
YW		 3832 log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m");
3833 return 0;
5c416fc4 3834 }
505f8da7 3835
5a937ea2 3836 r = sd_device_get_is_initialized(device);
51517f9e 3837 if (r < 0) {
bf331d87 3838 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 3839 goto failed;
3840 }
5a937ea2 3841 if (r == 0) {
505f8da7 3842 /* not yet ready */
79008bdd 3843 log_link_debug(link, "link pending udev initialization...");
505f8da7 3844 return 0;
3c4cb064 3845 }
505f8da7 3846
299ad32d
YW		 3847 r = device_is_renaming(device);
3848 if (r < 0) {
bf331d87 3849 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 3850 goto failed;
3851 }
3852 if (r > 0) {
bf331d87 3853 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 3854 return 0;
3855 }
3856
4f561e8e
TG		 3857 r = link_initialized(link, device);
3858 if (r < 0)
5c416fc4 3859 goto failed;
4f561e8e 3860 } else {
e6bf7774 3861 r = link_initialized_and_synced(link);
4f561e8e 3862 if (r < 0)
5c416fc4 3863 goto failed;
4f561e8e 3864 }
505f8da7 3865
a748b692 3866 return 0;
5c416fc4
TG		 3867failed:
3868 link_enter_failed(link);
3869 return r;
a748b692
TG		 3870}
3871
c601ebf7 3872int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3873 int r;
3874
3875 assert(link);
3876
3877 log_link_info(link, "Gained IPv6LL");
3878
c601ebf7 3879 link->ipv6ll_address = *address;
e7ab854c
TG		 3880 link_check_ready(link);
3881
b9ea3d2e 3882 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3883 r = link_acquire_ipv6_conf(link);
3884 if (r < 0) {
3885 link_enter_failed(link);
3886 return r;
3887 }
3888 }
3889
3890 return 0;
3891}
3892
9c0a72f9
TG		 3893static int link_carrier_gained(Link *link) {
3894 int r;
3895
3896 assert(link);
3897
0894cfe4 3898 r = wifi_get_info(link);
8d968fdd
YW		 3899 if (r < 0)
3900 return r;
3901 if (r > 0) {
572b21d9
YW		 3902 r = link_reconfigure_internal(link, NULL, false);
3903 if (r < 0) {
3904 link_enter_failed(link);
8d968fdd 3905 return r;
572b21d9 3906 }
8d968fdd
YW		 3907 }
3908
b9ea3d2e 3909 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3910 r = link_acquire_conf(link);
3911 if (r < 0) {
3912 link_enter_failed(link);
3913 return r;
3914 }
6fc25497 3915
b425c3ae 3916 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 3917 r = link_request_set_addresses(link);
6fc25497
SS		 3918 if (r < 0)
3919 return r;
9c0a72f9
TG		 3920 }
3921
0d4ad91d
AR		 3922 r = link_handle_bound_by_list(link);
3923 if (r < 0)
3924 return r;
3925
3db468ea
DM		 3926 r = link_set_bridge_mdb(link);
3927 if (r < 0)
3928 return r;
3929
9c0a72f9
TG		 3930 return 0;
3931}
3932
3933static int link_carrier_lost(Link *link) {
3934 int r;
3935
3936 assert(link);
3937
25e992ba 3938 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3939 return 0;
3940
fbdb6605 3941 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3942 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3943 * configuration and stop the clients as well. */
97e7fb39
SS		 3944 if (link->setting_mtu)
3945 return 0;
3946
95355a28 3947 r = link_stop_clients(link, false);
9c0a72f9
TG		 3948 if (r < 0) {
3949 link_enter_failed(link);
3950 return r;
3951 }
3952
28464ae0
SS		 3953 if (link_dhcp4_server_enabled(link))
3954 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3955
3104883d
SS		 3956 r = link_drop_config(link);
3957 if (r < 0)
3958 return r;
3959
2c7b826d 3960 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
f258e948 3961 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3962 r = link_drop_foreign_config(link);
3963 if (r < 0)
3964 return r;
3965 }
3104883d 3966
0d4ad91d
AR		 3967 r = link_handle_bound_by_list(link);
3968 if (r < 0)
3969 return r;
3970
9c0a72f9
TG		 3971 return 0;
3972}
3973
3974int link_carrier_reset(Link *link) {
3975 int r;
3976
3977 assert(link);
3978
3979 if (link_has_carrier(link)) {
3980 r = link_carrier_lost(link);
3981 if (r < 0)
3982 return r;
3983
3984 r = link_carrier_gained(link);
3985 if (r < 0)
3986 return r;
3987
6a7a4e4d 3988 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3989 }
3990
3991 return 0;
3992}
3993
d236718c
DS		 3994/* This is called every time an interface admin state changes to up;
3995 * specifically, when IFF_UP flag changes from unset to set */
3996static int link_admin_state_up(Link *link) {
3997 int r;
3998
3999 /* We set the ipv6 mtu after the device mtu, but the kernel resets
4000 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
4001 * ipv6_mtu_set prevents this from trying to set it too early before
4002 * the link->network has been setup; we only need to reset it
4003 * here if we've already set it during normal initialization. */
4004 if (link->ipv6_mtu_set) {
4005 r = link_set_ipv6_mtu(link);
4006 if (r < 0)
4007 return r;
4008 }
4009
4010 return 0;
4011}
4012
1c4baffc 4013int link_update(Link *link, sd_netlink_message *m) {
572b21d9 4014 _cleanup_strv_free_ char **s = NULL;
c49b33ac 4015 struct ether_addr mac;
ca4e095a 4016 const char *ifname;
afe7fd56 4017 uint32_t mtu;
d236718c 4018 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 4019 int old_master, r;
22936833 4020
dd3efc09 4021 assert(link);
b8941f74 4022 assert(link->ifname);
22936833
TG		 4023 assert(m);
4024
7619683b 4025 if (link->state == LINK_STATE_LINGER) {
5238e957 4026 log_link_info(link, "Link re-added");
289e6774 4027 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 4028
4029 r = link_new_carrier_maps(link);
4030 if (r < 0)
4031 return r;
7619683b
TG		 4032 }
4033
1c4baffc 4034 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 4035 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 4036 Manager *manager = link->manager;
b8941f74 4037
30de2b89 4038 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 4039
30de2b89
YW		 4040 link_drop(link);
4041 r = link_add(manager, m, &link);
4042 if (r < 0)
4043 return r;
b8941f74
TG		 4044 }
4045
572b21d9
YW		 4046 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
4047 if (r >= 0)
4048 strv_free_and_replace(link->alternative_names, s);
4049
1c4baffc 4050 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 4051 if (r >= 0 && mtu > 0) {
4052 link->mtu = mtu;
4e964aa0 4053 if (link->original_mtu == 0) {
afe7fd56 4054 link->original_mtu = mtu;
6a7a4e4d 4055 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 4056 }
4057
4058 if (link->dhcp_client) {
3c9b8860
TG		 4059 r = sd_dhcp_client_set_mtu(link->dhcp_client,
4060 link->mtu);
fc95c359
YW		 4061 if (r < 0)
4062 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 4063 }
7465dd22
PF		 4064
4065 if (link->radv) {
4066 r = sd_radv_set_mtu(link->radv, link->mtu);
4067 if (r < 0)
4068 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
4069 }
9842de0d 4070 }
69629de9 4071
e9189a1f
TG		 4072 /* The kernel may broadcast NEWLINK messages without the MAC address
4073 set, simply ignore them. */
1c4baffc 4074 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
807667f7
YW		 4075 if (r >= 0 && memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN) != 0) {
4076
4077 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN);
4078
4079 log_link_debug(link, "Gained new MAC address: "
4080 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
4081 mac.ether_addr_octet[0],
4082 mac.ether_addr_octet[1],
4083 mac.ether_addr_octet[2],
4084 mac.ether_addr_octet[3],
4085 mac.ether_addr_octet[4],
4086 mac.ether_addr_octet[5]);
4087
4088 if (link->ipv4ll) {
4089 bool restart = sd_ipv4ll_is_running(link->ipv4ll) > 0;
4090
4091 if (restart) {
4092 r = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 4093 if (r < 0)
807667f7 4094 return log_link_warning_errno(link, r, "Could not stop IPv4LL client: %m");
c49b33ac 4095 }
c49b33ac 4096
807667f7
YW		 4097 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
4098 if (r < 0)
4099 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
4100
4101 if (restart) {
4102 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d 4103 if (r < 0)
807667f7
YW		 4104 return log_link_warning_errno(link, r, "Could not restart IPv4LL client: %m");
4105 }
4106 }
4107
4108 if (link->dhcp_client) {
4109 r = sd_dhcp_client_set_mac(link->dhcp_client,
4110 (const uint8_t *) &link->mac,
4111 sizeof (link->mac),
4112 ARPHRD_ETHER);
4113 if (r < 0)
4114 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
4115
4116 r = dhcp4_set_client_identifier(link);
4117 if (r < 0)
4118 return log_link_warning_errno(link, r, "Could not set DHCP client identifier: %m");
4119 }
413708d1 4120
807667f7
YW		 4121 if (link->dhcp6_client) {
4122 const DUID* duid = link_get_duid(link);
4123 bool restart = sd_dhcp6_client_is_running(link->dhcp6_client) > 0;
4124
4125 if (restart) {
4126 r = sd_dhcp6_client_stop(link->dhcp6_client);
fff1f40c 4127 if (r < 0)
807667f7 4128 return log_link_warning_errno(link, r, "Could not stop DHCPv6 client: %m");
c49b33ac 4129 }
4138fb2c 4130
807667f7
YW		 4131 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
4132 (const uint8_t *) &link->mac,
4133 sizeof (link->mac),
4134 ARPHRD_ETHER);
4135 if (r < 0)
4136 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
8341a5c3 4137
807667f7
YW		 4138 if (link->network->iaid_set) {
4139 r = sd_dhcp6_client_set_iaid(link->dhcp6_client, link->network->iaid);
6a7a4e4d 4140 if (r < 0)
807667f7
YW		 4141 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
4142 }
4143
4144 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
4145 duid->type,
4146 duid->raw_data_len > 0 ? duid->raw_data : NULL,
4147 duid->raw_data_len);
4148 if (r < 0)
4149 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4150
4151 if (restart) {
4152 r = sd_dhcp6_client_start(link->dhcp6_client);
413708d1 4153 if (r < 0)
807667f7 4154 return log_link_warning_errno(link, r, "Could not restart DHCPv6 client: %m");
4138fb2c 4155 }
807667f7 4156 }
7465dd22 4157
807667f7
YW		 4158 if (link->radv) {
4159 bool restart = sd_radv_is_running(link->radv);
4160
4161 if (restart) {
4162 r = sd_radv_stop(link->radv);
7465dd22 4163 if (r < 0)
807667f7 4164 return log_link_warning_errno(link, r, "Could not stop Router Advertisement: %m");
7465dd22 4165 }
420d2058 4166
807667f7
YW		 4167 r = sd_radv_set_mac(link->radv, &link->mac);
4168 if (r < 0)
4169 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
4170
4171 if (restart) {
4172 r = sd_radv_start(link->radv);
420d2058 4173 if (r < 0)
807667f7 4174 return log_link_warning_errno(link, r, "Could not restart Router Advertisement: %m");
420d2058 4175 }
c49b33ac 4176 }
807667f7
YW		 4177
4178 if (link->ndisc) {
4179 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
4180 if (r < 0)
4181 return log_link_warning_errno(link, r, "Could not update MAC for NDisc: %m");
4182 }
4f882b2a
TG		 4183 }
4184
bb262ef0
YW		 4185 old_master = link->master_ifindex;
4186 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
4187
d236718c 4188 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 4189 had_carrier = link_has_carrier(link);
4190
bb262ef0 4191 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 4192 if (r < 0)
4193 return r;
4194
d236718c
DS		 4195 if (!link_was_admin_up && (link->flags & IFF_UP)) {
4196 log_link_info(link, "Link UP");
4197
4198 r = link_admin_state_up(link);
4199 if (r < 0)
4200 return r;
4201 } else if (link_was_admin_up && !(link->flags & IFF_UP))
4202 log_link_info(link, "Link DOWN");
4203
273eec24
LP		 4204 r = link_update_lldp(link);
4205 if (r < 0)
4206 return r;
4207
a61bb41c
TG		 4208 carrier_gained = !had_carrier && link_has_carrier(link);
4209 carrier_lost = had_carrier && !link_has_carrier(link);
4210
4211 if (carrier_gained) {
6a7a4e4d 4212 log_link_info(link, "Gained carrier");
a61bb41c 4213
9c0a72f9
TG		 4214 r = link_carrier_gained(link);
4215 if (r < 0)
4216 return r;
a61bb41c 4217 } else if (carrier_lost) {
6a7a4e4d 4218 log_link_info(link, "Lost carrier");
a61bb41c 4219
9c0a72f9
TG		 4220 r = link_carrier_lost(link);
4221 if (r < 0)
a61bb41c 4222 return r;
a61bb41c
TG		 4223 }
4224
4225 return 0;
dd3efc09 4226}
fe8db0c5 4227
b295beea
LP		 4228static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
4229 bool space = false;
b295beea
LP		 4230 Link *link;
4231
4232 assert(f);
4233 assert(prefix);
4234
4235 if (hashmap_isempty(h))
4236 return;
4237
0d536673 4238 fputs(prefix, f);
90e74a66 4239 HASHMAP_FOREACH(link, h) {
b295beea 4240 if (space)
0d536673 4241 fputc(' ', f);
b295beea
LP		 4242
4243 fprintf(f, "%i", link->ifindex);
4244 space = true;
4245 }
4246
0d536673 4247 fputc('\n', f);
b295beea
LP		 4248}
4249
64581765 4250static void link_save_dns(Link *link, FILE *f, struct in_addr_full **dns, unsigned n_dns, bool *space) {
dddc8d1e 4251 for (unsigned j = 0; j < n_dns; j++) {
e77bd3fd 4252 const char *str;
15761549 4253
64581765
YW		 4254 if (dns[j]->ifindex != 0 && dns[j]->ifindex != link->ifindex)
4255 continue;
4256
e77bd3fd
YW		 4257 str = in_addr_full_to_string(dns[j]);
4258 if (!str)
15761549 4259 continue;
15761549
YW		 4260
4261 if (*space)
4262 fputc(' ', f);
e77bd3fd 4263 fputs(str, f);
15761549
YW		 4264 *space = true;
4265 }
4266}
4267
d5e172d2
ZJS		 4268static void serialize_addresses(
4269 FILE *f,
4270 const char *lvalue,
4271 bool *space,
4272 char **addresses,
4273 sd_dhcp_lease *lease,
4274 bool conditional,
ddb82ec2 4275 sd_dhcp_lease_server_type what,
d5e172d2
ZJS		 4276 sd_dhcp6_lease *lease6,
4277 bool conditional6,
4278 int (*lease6_get_addr)(sd_dhcp6_lease*, const struct in6_addr**),
4279 int (*lease6_get_fqdn)(sd_dhcp6_lease*, char ***)) {
4280 int r;
4281
4282 bool _space = false;
4283 if (!space)
4284 space = &_space;
4285
4286 if (lvalue)
4287 fprintf(f, "%s=", lvalue);
4288 fputstrv(f, addresses, NULL, space);
4289
4290 if (lease && conditional) {
4291 const struct in_addr *lease_addresses;
4292
4293 r = sd_dhcp_lease_get_servers(lease, what, &lease_addresses);
4294 if (r > 0)
d8bff5cc 4295 serialize_in_addrs(f, lease_addresses, r, space, in4_addr_is_non_local);
d5e172d2
ZJS		 4296 }
4297
4298 if (lease6 && conditional6 && lease6_get_addr) {
4299 const struct in6_addr *in6_addrs;
4300
4301 r = lease6_get_addr(lease6, &in6_addrs);
d8bff5cc
ZJS		 4302 if (r > 0)
4303 serialize_in6_addrs(f, in6_addrs, r, space);
d5e172d2
ZJS		 4304 }
4305
4306 if (lease6 && conditional6 && lease6_get_fqdn) {
4307 char **in6_hosts;
4308
4309 r = lease6_get_fqdn(lease6, &in6_hosts);
4310 if (r > 0)
4311 fputstrv(f, in6_hosts, NULL, space);
4312 }
4313
4314 if (lvalue)
4315 fputc('\n', f);
4316}
4317
fe8db0c5 4318int link_save(Link *link) {
d361b373 4319 const char *admin_state, *oper_state, *carrier_state, *address_state;
68a8723c 4320 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 4321 _cleanup_fclose_ FILE *f = NULL;
c1eb9872 4322 Route *route;
18d8a2cf 4323 Address *a;
fe8db0c5
TG		 4324 int r;
4325
4326 assert(link);
4327 assert(link->state_file);
68a8723c 4328 assert(link->lease_file);
bbf7c048
TG		 4329 assert(link->manager);
4330
370e9930 4331 if (link->state == LINK_STATE_LINGER) {
6990fb6b 4332 (void) unlink(link->state_file);
370e9930
TG		 4333 return 0;
4334 }
4335
34437b4f
LP		 4336 link_lldp_save(link);
4337
deb2e523
TG		 4338 admin_state = link_state_to_string(link->state);
4339 assert(admin_state);
4340
e375dcde
TG		 4341 oper_state = link_operstate_to_string(link->operstate);
4342 assert(oper_state);
deb2e523 4343
ac999bf0
YW		 4344 carrier_state = link_carrier_state_to_string(link->carrier_state);
4345 assert(carrier_state);
4346
4347 address_state = link_address_state_to_string(link->address_state);
4348 assert(address_state);
4349
fe8db0c5
TG		 4350 r = fopen_temporary(link->state_file, &f, &temp_path);
4351 if (r < 0)
6a7a4e4d 4352 goto fail;
fe8db0c5 4353
5512a963 4354 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 4355
4356 fprintf(f,
4357 "# This is private data. Do not parse.\n"
deb2e523 4358 "ADMIN_STATE=%s\n"
ac999bf0
YW		 4359 "OPER_STATE=%s\n"
4360 "CARRIER_STATE=%s\n"
4361 "ADDRESS_STATE=%s\n",
4362 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 4363
bcb7a07e 4364 if (link->network) {
fe0e16db
YW		 4365 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
4366 const char *dhcp_domainname = NULL, *p;
fe0e16db 4367 bool space;
07bdc70d 4368
c1a38904
MTL		 4369 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
4370 yes_no(link->network->required_for_online));
4371
d5e172d2
ZJS		 4372 LinkOperationalStateRange st = link->network->required_operstate_for_online;
4373 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s%s%s\n",
4374 strempty(link_operstate_to_string(st.min)),
4375 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? ":" : "",
4376 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? strempty(link_operstate_to_string(st.max)) : "");
4ac77d63 4377
adc5b2e2
TG		 4378 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
4379
d5e172d2
ZJS		 4380 /************************************************************/
4381
0d536673 4382 fputs("DNS=", f);
ea352b40 4383 space = false;
15761549 4384 if (link->n_dns != (unsigned) -1)
64581765 4385 link_save_dns(link, f, link->dns, link->n_dns, &space);
15761549 4386 else
64581765 4387 link_save_dns(link, f, link->network->dns, link->network->n_dns, &space);
d5314fff 4388
d5e172d2
ZJS		 4389 serialize_addresses(f, NULL, &space,
4390 NULL,
4391 link->dhcp_lease,
4392 link->network->dhcp_use_dns,
ddb82ec2 4393 SD_DHCP_LEASE_DNS,
1633c457 4394 link->dhcp6_lease,
d5e172d2
ZJS		 4395 link->network->dhcp6_use_dns,
4396 sd_dhcp6_lease_get_dns,
4397 NULL);
1e7a0e21 4398
a8c10331 4399 /* Make sure to flush out old entries before we use the NDisc data */
1e7a0e21
LP		 4400 ndisc_vacuum(link);
4401
b296797f 4402 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 4403 NDiscRDNSS *dd;
4404
90e74a66 4405 SET_FOREACH(dd, link->ndisc_rdnss)
d8bff5cc 4406 serialize_in6_addrs(f, &dd->address, 1, &space);
299d578f
SS		 4407 }
4408
4409 fputc('\n', f);
4410
d5e172d2
ZJS		 4411 /************************************************************/
4412
4413 serialize_addresses(f, "NTP", NULL,
4414 link->ntp ?: link->network->ntp,
4415 link->dhcp_lease,
4416 link->network->dhcp_use_ntp,
ddb82ec2 4417 SD_DHCP_LEASE_NTP,
1633c457 4418 link->dhcp6_lease,
d5e172d2
ZJS		 4419 link->network->dhcp6_use_ntp,
4420 sd_dhcp6_lease_get_ntp_addrs,
4421 sd_dhcp6_lease_get_ntp_fqdn);
4422
4423 serialize_addresses(f, "SIP", NULL,
2a71d57f 4424 NULL,
d5e172d2
ZJS		 4425 link->dhcp_lease,
4426 link->network->dhcp_use_sip,
ddb82ec2 4427 SD_DHCP_LEASE_SIP,
2a71d57f 4428 NULL, false, NULL, NULL);
d5e172d2
ZJS		 4429
4430 /************************************************************/
bd8f6538 4431
b2a81c0b 4432 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 4433 if (link->dhcp_lease) {
b2a81c0b 4434 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 4435 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
4436 }
1633c457
YW		 4437 if (link->dhcp6_lease)
4438 (void) sd_dhcp6_lease_get_domains(link->dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 4439 }
4440
fe0e16db
YW		 4441 fputs("DOMAINS=", f);
4442 space = false;
90e74a66 4443 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains)
fe0e16db 4444 fputs_with_space(f, p, NULL, &space);
07bdc70d 4445
1e7a0e21 4446 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP		 4447 if (dhcp_domainname)
4448 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4449 if (dhcp_domains)
4450 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4451 if (dhcp6_domains)
4452 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 4453 }
4454
4455 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
4456 NDiscDNSSL *dd;
1e7a0e21 4457
90e74a66 4458 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 4459 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4460 }
b2a81c0b 4461
0d536673 4462 fputc('\n', f);
6192b846 4463
d5e172d2
ZJS		 4464 /************************************************************/
4465
fe0e16db
YW		 4466 fputs("ROUTE_DOMAINS=", f);
4467 space = false;
90e74a66 4468 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains)
fe0e16db 4469 fputs_with_space(f, p, NULL, &space);
b2a81c0b 4470
1e7a0e21 4471 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
1e7a0e21
LP		 4472 if (dhcp_domainname)
4473 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4474 if (dhcp_domains)
4475 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4476 if (dhcp6_domains)
4477 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 4478 }
4479
4480 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
4481 NDiscDNSSL *dd;
1e7a0e21 4482
90e74a66 4483 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 4484 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4485 }
b2a81c0b 4486
0d536673 4487 fputc('\n', f);
67272d15 4488
d5e172d2
ZJS		 4489 /************************************************************/
4490
3c9b8860 4491 fprintf(f, "LLMNR=%s\n",
15761549 4492 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
d5e172d2
ZJS		 4493
4494 /************************************************************/
4495
aaa297d4 4496 fprintf(f, "MDNS=%s\n",
15761549 4497 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
15761549 4498
d5e172d2
ZJS		 4499 /************************************************************/
4500
4501 int dns_default_route =
4502 link->dns_default_route >= 0 ? link->dns_default_route :
4503 link->network->dns_default_route;
4504 if (dns_default_route >= 0)
4505 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(dns_default_route));
4506
4507 /************************************************************/
4508
4509 DnsOverTlsMode dns_over_tls_mode =
4510 link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID ? link->dns_over_tls_mode :
4511 link->network->dns_over_tls_mode;
4512 if (dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
4513 fprintf(f, "DNS_OVER_TLS=%s\n", dns_over_tls_mode_to_string(dns_over_tls_mode));
4514
4515 /************************************************************/
4516
4517 DnssecMode dnssec_mode =
4518 link->dnssec_mode != _DNSSEC_MODE_INVALID ? link->dnssec_mode :
4519 link->network->dnssec_mode;
4520 if (dnssec_mode != _DNSSEC_MODE_INVALID)
4521 fprintf(f, "DNSSEC=%s\n", dnssec_mode_to_string(dnssec_mode));
4522
4523 /************************************************************/
4524
4525 Set *nta_anchors = link->dnssec_negative_trust_anchors;
4526 if (set_isempty(nta_anchors))
4527 nta_anchors = link->network->dnssec_negative_trust_anchors;
4528
4529 if (!set_isempty(nta_anchors)) {
8a516214
LP		 4530 const char *n;
4531
0d536673 4532 fputs("DNSSEC_NTA=", f);
8a516214 4533 space = false;
90e74a66 4534 SET_FOREACH(n, nta_anchors)
d390f8ef 4535 fputs_with_space(f, n, NULL, &space);
0d536673 4536 fputc('\n', f);
8a516214
LP		 4537 }
4538
d5e172d2
ZJS		 4539 /************************************************************/
4540
0d536673 4541 fputs("ADDRESSES=", f);
e7780c8d 4542 space = false;
90e74a66 4543 SET_FOREACH(a, link->addresses) {
e7780c8d
TG		 4544 _cleanup_free_ char *address_str = NULL;
4545
4546 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
4547 if (r < 0)
4548 goto fail;
4549
e7780c8d
TG		 4550 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
4551 space = true;
4552 }
0d536673 4553 fputc('\n', f);
c1eb9872 4554
d5e172d2
ZJS		 4555 /************************************************************/
4556
0d536673 4557 fputs("ROUTES=", f);
c1eb9872 4558 space = false;
90e74a66 4559 SET_FOREACH(route, link->routes) {
c1eb9872
TG		 4560 _cleanup_free_ char *route_str = NULL;
4561
4562 r = in_addr_to_string(route->family, &route->dst, &route_str);
4563 if (r < 0)
4564 goto fail;
4565
ecc3f340
ZJS		 4566 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
4567 space ? " " : "", route_str,
f833694d 4568 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 4569 space = true;
4570 }
4571
0d536673 4572 fputc('\n', f);
bcb7a07e 4573 }
7374f9d8 4574
b295beea
LP		 4575 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
4576 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 4577
8eb9058d 4578 if (link->dhcp_lease) {
bd91b83e 4579 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 4580 if (r < 0)
c2d6bd61 4581 goto fail;
fe8db0c5 4582
7374f9d8 4583 fprintf(f,
b0e39c82
TG		 4584 "DHCP_LEASE=%s\n",
4585 link->lease_file);
deb2e523 4586 } else
6990fb6b 4587 (void) unlink(link->lease_file);
fe8db0c5 4588
0bc70f1d
TG		 4589 if (link->ipv4ll) {
4590 struct in_addr address;
4591
4592 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
4593 if (r >= 0) {
0d536673 4594 fputs("IPV4LL_ADDRESS=", f);
072320ea 4595 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 4596 fputc('\n', f);
0bc70f1d
TG		 4597 }
4598 }
4599
7e738e7b
SS		 4600 if (link->dhcp6_client) {
4601 _cleanup_free_ char *duid = NULL;
4602 uint32_t iaid;
4603
4604 r = sd_dhcp6_client_get_iaid(link->dhcp6_client, &iaid);
4605 if (r >= 0)
4606 fprintf(f, "DHCP6_CLIENT_IAID=0x%x\n", iaid);
4607
4608 r = sd_dhcp6_client_duid_as_string(link->dhcp6_client, &duid);
4609 if (r >= 0)
4610 fprintf(f, "DHCP6_CLIENT_DUID=%s\n", duid);
4611 }
18d8a2cf 4612
c2d6bd61
LP		 4613 r = fflush_and_check(f);
4614 if (r < 0)
4615 goto fail;
fe8db0c5 4616
c2d6bd61 4617 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 4618 r = -errno;
c2d6bd61 4619 goto fail;
fe8db0c5
TG		 4620 }
4621
c2d6bd61 4622 return 0;
dacd6cee 4623
c2d6bd61 4624fail:
6a7a4e4d 4625 (void) unlink(link->state_file);
6a7a4e4d
LP		 4626 if (temp_path)
4627 (void) unlink(temp_path);
4628
dacd6cee 4629 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 4630}
4631
84de38c5
TG		 4632/* The serialized state in /run is no longer up-to-date. */
4633void link_dirty(Link *link) {
4634 int r;
4635
4636 assert(link);
4637
0c241a37
SS		 4638 /* mark manager dirty as link is dirty */
4639 manager_dirty(link->manager);
4640
de7fef4b 4641 r = set_ensure_put(&link->manager->dirty_links, NULL, link);
0c241a37 4642 if (r <= 0)
de7fef4b 4643 /* Ignore allocation errors and don't take another ref if the link was already dirty */
84de38c5 4644 return;
84de38c5
TG		 4645 link_ref(link);
4646}
4647
4648/* The serialized state in /run is up-to-date */
4649void link_clean(Link *link) {
4650 assert(link);
4651 assert(link->manager);
4652
1046bf9b 4653 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4654}
4655
c2a65950
YW		 4656int link_save_and_clean(Link *link) {
4657 int r;
4658
4659 r = link_save(link);
4660 if (r < 0)
4661 return r;
4662
4663 link_clean(link);
4664 return 0;
4665}
4666
fe8db0c5 4667static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4668 [LINK_STATE_PENDING] = "pending",
bd08ce56 4669 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 4670 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 4671 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4672 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4673 [LINK_STATE_FAILED] = "failed",
370e9930 4674 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4675};
4676
4677DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
5ecb131d
YW		 4678
4679int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg) {
4680 const char *err_msg = NULL;
4681
4682 (void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg);
d157714b
YW		 4683 return log_link_full_errno(link, level, err,
4684 "%s: %s%s%s%m",
4685 msg,
4686 strempty(err_msg),
4687 err_msg && !endswith(err_msg, ".") ? "." : "",
4688 err_msg ? " " : "");
5ecb131d 4689}
Unnamed repository; edit this file 'description' to name the repository.