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network: synchronously save state file when link is being reconfigured
[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>
4cc7a82c 6#include <unistd.h>
f579559b 7
b5efdb8a 8#include "alloc-util.h"
737f1405
YW		 9#include "bond.h"
10#include "bridge.h"
1346b1f0 11#include "bus-util.h"
27dfc982 12#include "dhcp-identifier.h"
bd91b83e 13#include "dhcp-lease-internal.h"
686d13b9 14#include "env-file.h"
4bb7cc82 15#include "ethtool-util.h"
3ffd4af2 16#include "fd-util.h"
cf1d700d 17#include "fileio.h"
737f1405 18#include "ipvlan.h"
ef118d00 19#include "missing_network.h"
cf1d700d 20#include "netlink-util.h"
c6f7c917 21#include "network-internal.h"
3ddcbeea 22#include "networkd-can.h"
8fcf1d61 23#include "networkd-dhcp-server.h"
ca5ad760
YW		 24#include "networkd-dhcp4.h"
25#include "networkd-dhcp6.h"
26#include "networkd-ipv4ll.h"
a0e5c15d 27#include "networkd-ipv6-proxy-ndp.h"
6a1af3d4
YW		 28#include "networkd-link-bus.h"
29#include "networkd-link.h"
8e1ad1ea 30#include "networkd-lldp-tx.h"
23f53b99 31#include "networkd-manager.h"
1e7a0e21 32#include "networkd-ndisc.h"
e4a71bf3 33#include "networkd-neighbor.h"
7465dd22 34#include "networkd-radv.h"
bce67bbe 35#include "networkd-routing-policy-rule.h"
8d968fdd 36#include "networkd-wifi.h"
737f1405 37#include "qdisc.h"
cf1d700d
TG		 38#include "set.h"
39#include "socket-util.h"
bf331d87 40#include "stat-util.h"
15a5e950 41#include "stdio-util.h"
8b43440b 42#include "string-table.h"
51517f9e 43#include "strv.h"
62e021a9 44#include "sysctl-util.h"
e4de7287 45#include "tmpfile-util.h"
299ad32d 46#include "udev-util.h"
cf1d700d 47#include "util.h"
737f1405 48#include "vrf.h"
fc2f9534 49
bdb9f580
YW		 50uint32_t link_get_vrf_table(Link *link) {
51 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
52}
53
54uint32_t link_get_dhcp_route_table(Link *link) {
55 /* When the interface is part of an VRF use the VRFs routing table, unless
56 * another table is explicitly specified. */
57 if (link->network->dhcp_route_table_set)
58 return link->network->dhcp_route_table;
59 return link_get_vrf_table(link);
60}
61
62uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
63 if (link->network->ipv6_accept_ra_route_table_set)
64 return link->network->ipv6_accept_ra_route_table;
65 return link_get_vrf_table(link);
66}
67
f24648a6
YW		 68DUID* link_get_duid(Link *link) {
69 if (link->network->duid.type != _DUID_TYPE_INVALID)
70 return &link->network->duid;
71 else
72 return &link->manager->duid;
73}
74
b9d74c40
LP		 75static bool link_dhcp6_enabled(Link *link) {
76 assert(link);
77
fa709992
LP		 78 if (!socket_ipv6_is_supported())
79 return false;
80
78c958f8
TG		 81 if (link->flags & IFF_LOOPBACK)
82 return false;
83
84 if (!link->network)
85 return false;
86
f2bfcdb9
YW		 87 if (link->network->bond)
88 return false;
89
500b96eb 90 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 91 return false;
92
e0ee46f2 93 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 94}
95
b9d74c40
LP		 96static bool link_dhcp4_enabled(Link *link) {
97 assert(link);
98
78c958f8
TG		 99 if (link->flags & IFF_LOOPBACK)
100 return false;
101
102 if (!link->network)
103 return false;
104
f2bfcdb9
YW		 105 if (link->network->bond)
106 return false;
107
500b96eb 108 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 109 return false;
110
e0ee46f2 111 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 112}
113
b9d74c40
LP		 114static bool link_dhcp4_server_enabled(Link *link) {
115 assert(link);
116
78c958f8
TG		 117 if (link->flags & IFF_LOOPBACK)
118 return false;
119
120 if (!link->network)
121 return false;
122
f2bfcdb9
YW		 123 if (link->network->bond)
124 return false;
125
500b96eb 126 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 127 return false;
128
78c958f8
TG		 129 return link->network->dhcp_server;
130}
131
2d792895 132bool link_ipv4ll_enabled(Link *link, AddressFamily mask) {
b9d74c40 133 assert(link);
910feb78 134 assert((mask & ~(ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) == 0);
b9d74c40 135
78c958f8
TG		 136 if (link->flags & IFF_LOOPBACK)
137 return false;
138
139 if (!link->network)
140 return false;
141
500b96eb 142 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 143 return false;
144
98d20a17 145 if (STRPTR_IN_SET(link->kind,
146 "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
c6ac3729 147 "vti6", "nlmon", "xfrm"))
a8f5bba6
JD		 148 return false;
149
f410d463
YW		 150 /* L3 or L3S mode do not support ARP. */
151 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
152 return false;
153
f2bfcdb9
YW		 154 if (link->network->bond)
155 return false;
156
910feb78 157 return link->network->link_local & mask;
8bc17bb3
SS		 158}
159
b9d74c40
LP		 160static bool link_ipv6ll_enabled(Link *link) {
161 assert(link);
162
fa709992
LP		 163 if (!socket_ipv6_is_supported())
164 return false;
165
d0d6a4cd
TG		 166 if (link->flags & IFF_LOOPBACK)
167 return false;
168
169 if (!link->network)
170 return false;
171
500b96eb 172 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 173 return false;
174
175 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon"))
a8f5bba6
JD		 176 return false;
177
f2bfcdb9
YW		 178 if (link->network->bond)
179 return false;
180
e0ee46f2 181 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 182}
183
439689c6
SS		 184static bool link_ipv6_enabled(Link *link) {
185 assert(link);
186
187 if (!socket_ipv6_is_supported())
188 return false;
189
b102cdca 190 if (link->network->bond)
2b00a4e0
TY		 191 return false;
192
500b96eb 193 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 194 return false;
195
4cef7fe3 196 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
adfeee49
YW		 197 if (link_ipv6ll_enabled(link))
198 return true;
199
200 if (network_has_static_ipv6_configurations(link->network))
201 return true;
202
203 return false;
439689c6
SS		 204}
205
7465dd22
PF		 206static bool link_radv_enabled(Link *link) {
207 assert(link);
208
209 if (!link_ipv6ll_enabled(link))
210 return false;
211
55a7c78b 212 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 213}
214
769d324c 215static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 216 assert(link);
217
5a8bcb67
LP		 218 if (link->flags & IFF_LOOPBACK)
219 return false;
220
221 if (!link->network)
222 return false;
223
2d792895 224 if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
765afd5c
LP		 225 return false;
226
e0ee46f2 227 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 228}
229
230static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 231 assert(link);
765afd5c
LP		 232
233 if (!socket_ipv6_is_supported())
234 return false;
235
769d324c
LP		 236 if (link->flags & IFF_LOOPBACK)
237 return false;
238
239 if (!link->network)
240 return false;
241
2d792895 242 if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
765afd5c
LP		 243 return false;
244
e0ee46f2 245 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 246}
247
23d8b221
SS		 248static bool link_proxy_arp_enabled(Link *link) {
249 assert(link);
250
251 if (link->flags & IFF_LOOPBACK)
252 return false;
253
254 if (!link->network)
255 return false;
256
257 if (link->network->proxy_arp < 0)
258 return false;
259
260 return true;
261}
262
b9d74c40
LP		 263static bool link_ipv6_accept_ra_enabled(Link *link) {
264 assert(link);
265
fa709992
LP		 266 if (!socket_ipv6_is_supported())
267 return false;
268
f5a8c43f
TG		 269 if (link->flags & IFF_LOOPBACK)
270 return false;
271
272 if (!link->network)
273 return false;
274
702c979f
SS		 275 if (!link_ipv6ll_enabled(link))
276 return false;
277
f5a8c43f
TG		 278 /* If unset use system default (enabled if local forwarding is disabled.
279 * disabled if local forwarding is enabled).
280 * If set, ignore or enforce RA independent of local forwarding state.
281 */
282 if (link->network->ipv6_accept_ra < 0)
283 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
284 return !link_ipv6_forward_enabled(link);
285 else if (link->network->ipv6_accept_ra > 0)
286 /* accept RA even if ip_forward is enabled */
287 return true;
288 else
289 /* ignore RA */
290 return false;
291}
292
1f0d9695 293static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 294 assert(link);
d68e2e59
LP		 295
296 if (!socket_ipv6_is_supported())
297 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
298
49092e22 299 if (link->flags & IFF_LOOPBACK)
1f0d9695 300 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 301
302 if (!link->network)
1f0d9695 303 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 304
305 return link->network->ipv6_privacy_extensions;
306}
307
57ad7607 308static int link_update_ipv6_sysctl(Link *link) {
482efedc 309 bool enabled;
439689c6
SS		 310 int r;
311
312 if (link->flags & IFF_LOOPBACK)
313 return 0;
314
482efedc
SS		 315 enabled = link_ipv6_enabled(link);
316 if (enabled) {
317 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", false);
318 if (r < 0)
57ad7607
ZJS		 319 return log_link_warning_errno(link, r, "Cannot enable IPv6: %m");
320
321 log_link_info(link, "IPv6 successfully enabled");
482efedc 322 }
439689c6
SS		 323
324 return 0;
325}
326
34bf3c00
YW		 327static bool link_is_enslaved(Link *link) {
328 if (link->flags & IFF_SLAVE)
329 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
330 return true;
331
34bf3c00
YW		 332 if (!link->network)
333 return false;
334
bb262ef0 335 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 336 return true;
337
bb262ef0
YW		 338 /* TODO: add conditions for other netdevs. */
339
34bf3c00
YW		 340 return false;
341}
342
45e11abf
YW		 343static void link_update_master_operstate(Link *link, NetDev *netdev) {
344 Link *master;
345
346 if (!netdev)
347 return;
348
349 if (link_get(link->manager, netdev->ifindex, &master) < 0)
350 return;
351
352 link_update_operstate(master, true);
353}
354
355void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 356 LinkOperationalState operstate;
1678fbb3
YW		 357 LinkCarrierState carrier_state;
358 LinkAddressState address_state;
35c5a9ca 359 _cleanup_strv_free_ char **p = NULL;
1678fbb3 360 uint8_t scope = RT_SCOPE_NOWHERE;
35c5a9ca 361 bool changed = false;
1678fbb3 362 Address *address;
45e11abf 363 Iterator i;
14153d1b 364
84de38c5
TG		 365 assert(link);
366
367 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 368 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 369 else if (link_has_carrier(link)) {
1678fbb3
YW		 370 if (link_is_enslaved(link))
371 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 372 else
1678fbb3 373 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 374 } else if (link->flags & IFF_UP)
1678fbb3 375 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 376 else
1678fbb3 377 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 378
1678fbb3 379 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 380 Link *slave;
381
5f707e12 382 SET_FOREACH(slave, link->slaves, i) {
959f65d3 383 link_update_operstate(slave, false);
84de38c5 384
1678fbb3
YW		 385 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
386 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 387 }
959f65d3 388 }
84de38c5 389
1678fbb3
YW		 390 SET_FOREACH(address, link->addresses, i) {
391 if (!address_is_ready(address))
392 continue;
84de38c5 393
1678fbb3
YW		 394 if (address->scope < scope)
395 scope = address->scope;
396 }
84de38c5 397
1678fbb3
YW		 398 /* for operstate we also take foreign addresses into account */
399 SET_FOREACH(address, link->addresses_foreign, i) {
400 if (!address_is_ready(address))
401 continue;
402
403 if (address->scope < scope)
404 scope = address->scope;
405 }
406
407 if (scope < RT_SCOPE_SITE)
408 /* universally accessible addresses found */
409 address_state = LINK_ADDRESS_STATE_ROUTABLE;
410 else if (scope < RT_SCOPE_HOST)
411 /* only link or site local addresses found */
412 address_state = LINK_ADDRESS_STATE_DEGRADED;
84de38c5 413 else
1678fbb3
YW		 414 /* no useful addresses found */
415 address_state = LINK_ADDRESS_STATE_OFF;
416
417 /* Mapping of address and carrier state vs operational state
418 * carrier state
419 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
420 * ------------------------------------------------------------------------------
421 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
422 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
423 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
424 */
84de38c5 425
1678fbb3
YW		 426 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
427 operstate = (LinkOperationalState) carrier_state;
428 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
429 operstate = LINK_OPERSTATE_ROUTABLE;
430 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
431 operstate = LINK_OPERSTATE_DEGRADED;
432 else
14153d1b
YW		 433 operstate = LINK_OPERSTATE_ENSLAVED;
434
35c5a9ca
YW		 435 if (link->carrier_state != carrier_state) {
436 link->carrier_state = carrier_state;
437 changed = true;
438 if (strv_extend(&p, "CarrierState") < 0)
439 log_oom();
440 }
959f65d3 441
35c5a9ca
YW		 442 if (link->address_state != address_state) {
443 link->address_state = address_state;
444 changed = true;
445 if (strv_extend(&p, "AddressState") < 0)
446 log_oom();
959f65d3
YW		 447 }
448
84de38c5
TG		 449 if (link->operstate != operstate) {
450 link->operstate = operstate;
35c5a9ca
YW		 451 changed = true;
452 if (strv_extend(&p, "OperationalState") < 0)
453 log_oom();
84de38c5 454 }
959f65d3 455
35c5a9ca
YW		 456 if (p)
457 link_send_changed_strv(link, p);
458 if (changed)
459 link_dirty(link);
460
45e11abf
YW		 461 if (also_update_master && link->network) {
462 link_update_master_operstate(link, link->network->bond);
463 link_update_master_operstate(link, link->network->bridge);
959f65d3 464 }
84de38c5
TG		 465}
466
51d18171
TG		 467#define FLAG_STRING(string, flag, old, new) \
468 (((old ^ new) & flag) \
469 ? ((old & flag) ? (" -" string) : (" +" string)) \
470 : "")
471
bb262ef0 472static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 473 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
474 uint8_t operstate;
475 int r;
476
477 assert(link);
478
479 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 480 if (r < 0)
481 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 482
1c4baffc 483 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 484 if (r < 0)
485 /* if we got a message without operstate, take it to mean
486 the state was unchanged */
487 operstate = link->kernel_operstate;
488
bb262ef0 489 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 490 return 0;
491
492 if (link->flags != flags) {
6a7a4e4d 493 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		 494 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
495 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
496 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
497 FLAG_STRING("UP", IFF_UP, link->flags, flags),
498 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
499 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
500 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
501 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
502 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
503 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
504 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
505 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
506 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
507 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
508 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
509 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
510 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
511 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
512 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
513
514 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
515 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
516 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
517 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
518 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
519 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
520 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
521 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
522
523 /* link flags are currently at most 18 bits, let's align to
524 * printing 20 */
525 if (unknown_flags_added)
79008bdd 526 log_link_debug(link,
6a7a4e4d 527 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 528 unknown_flags_added);
529
530 if (unknown_flags_removed)
79008bdd 531 log_link_debug(link,
6a7a4e4d 532 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 533 unknown_flags_removed);
534 }
535
536 link->flags = flags;
537 link->kernel_operstate = operstate;
538
959f65d3 539 link_update_operstate(link, true);
51d18171
TG		 540
541 return 0;
542}
543
1c4baffc 544static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 545 _cleanup_(link_unrefp) Link *link = NULL;
6cad256d 546 const char *ifname, *kind = NULL;
b710e6b6 547 unsigned short iftype;
572b21d9
YW		 548 int r, ifindex;
549 uint16_t type;
f579559b 550
0c2f9b84 551 assert(manager);
505f8da7 552 assert(message);
f579559b
TG		 553 assert(ret);
554
6cad256d
TJ		 555 /* check for link kind */
556 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
557 if (r == 0) {
db2f8a2e 558 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 559 r = sd_netlink_message_exit_container(message);
560 if (r < 0)
561 return r;
562 }
563
1c4baffc 564 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 565 if (r < 0)
566 return r;
567 else if (type != RTM_NEWLINK)
568 return -EINVAL;
569
570 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
571 if (r < 0)
572 return r;
573 else if (ifindex <= 0)
574 return -EINVAL;
575
b710e6b6
LP		 576 r = sd_rtnl_message_link_get_type(message, &iftype);
577 if (r < 0)
578 return r;
579
1c4baffc 580 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 581 if (r < 0)
582 return r;
583
17f9c355 584 link = new(Link, 1);
f579559b
TG		 585 if (!link)
586 return -ENOMEM;
587
17f9c355
YW		 588 *link = (Link) {
589 .n_ref = 1,
590 .manager = manager,
591 .state = LINK_STATE_PENDING,
17f9c355
YW		 592 .ifindex = ifindex,
593 .iftype = iftype,
15761549
YW		 594
595 .n_dns = (unsigned) -1,
596 .dns_default_route = -1,
597 .llmnr = _RESOLVE_SUPPORT_INVALID,
598 .mdns = _RESOLVE_SUPPORT_INVALID,
599 .dnssec_mode = _DNSSEC_MODE_INVALID,
600 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
17f9c355
YW		 601 };
602
505f8da7
TG		 603 link->ifname = strdup(ifname);
604 if (!link->ifname)
605 return -ENOMEM;
f579559b 606
6cad256d
TJ		 607 if (kind) {
608 link->kind = strdup(kind);
609 if (!link->kind)
610 return -ENOMEM;
611 }
612
cbff7170
TJ		 613 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
614 if (r < 0)
615 log_link_debug_errno(link, r, "New device has no master, continuing without");
616
1c4baffc 617 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 618 if (r < 0)
34437b4f 619 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 620
6666c4fa 621 r = ethtool_get_permanent_macaddr(NULL, link->ifname, &link->permanent_mac);
4bb7cc82
YW		 622 if (r < 0)
623 log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
624
572b21d9
YW		 625 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &link->alternative_names);
626 if (r < 0 && r != -ENODATA)
627 return r;
628
34437b4f 629 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 630 return -ENOMEM;
fe8db0c5 631
34437b4f 632 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 633 return -ENOMEM;
634
34437b4f 635 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 636 return -ENOMEM;
637
d5099efc 638 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 639 if (r < 0)
640 return r;
641
642 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 643 if (r < 0)
644 return r;
645
bb262ef0 646 r = link_update_flags(link, message, false);
51d18171
TG		 647 if (r < 0)
648 return r;
649
1cc6c93a 650 *ret = TAKE_PTR(link);
f579559b
TG		 651
652 return 0;
653}
654
15761549
YW		 655void link_ntp_settings_clear(Link *link) {
656 link->ntp = strv_free(link->ntp);
657}
658
659void link_dns_settings_clear(Link *link) {
660 link->dns = mfree(link->dns);
661 link->n_dns = (unsigned) -1;
662
663 link->search_domains = ordered_set_free_free(link->search_domains);
664 link->route_domains = ordered_set_free_free(link->route_domains);
665
666 link->dns_default_route = -1;
667 link->llmnr = _RESOLVE_SUPPORT_INVALID;
668 link->mdns = _RESOLVE_SUPPORT_INVALID;
669 link->dnssec_mode = _DNSSEC_MODE_INVALID;
670 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
671
672 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
673}
674
1a6bb31f
YW		 675static void link_free_engines(Link *link) {
676 if (!link)
677 return;
678
679 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
680 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
681 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
682 link->dhcp_routes = set_free(link->dhcp_routes);
683
684 link->lldp = sd_lldp_unref(link->lldp);
685
686 ndisc_flush(link);
687
688 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
689 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
690 link->ndisc = sd_ndisc_unref(link->ndisc);
691 link->radv = sd_radv_unref(link->radv);
692}
693
8301aa0b 694static Link *link_free(Link *link) {
428fd0a7
TG		 695 Address *address;
696
8301aa0b 697 assert(link);
f579559b 698
15761549
YW		 699 link_ntp_settings_clear(link);
700 link_dns_settings_clear(link);
701
f535e354
YW		 702 link->routes = set_free_with_destructor(link->routes, route_free);
703 link->routes_foreign = set_free_with_destructor(link->routes_foreign, route_free);
adda1ed9 704
c16c7808
SS		 705 link->nexthops = set_free_with_destructor(link->nexthops, nexthop_free);
706 link->nexthops_foreign = set_free_with_destructor(link->nexthops_foreign, nexthop_free);
707
d1bdafd2
WKI		 708 link->neighbors = set_free_with_destructor(link->neighbors, neighbor_free);
709 link->neighbors_foreign = set_free_with_destructor(link->neighbors_foreign, neighbor_free);
710
f535e354
YW		 711 link->addresses = set_free_with_destructor(link->addresses, address_free);
712 link->addresses_foreign = set_free_with_destructor(link->addresses_foreign, address_free);
adda1ed9 713
11bf3cce
LP		 714 while ((address = link->pool_addresses)) {
715 LIST_REMOVE(addresses, link->pool_addresses, address);
716 address_free(address);
717 }
718
7272b25e 719 link_lldp_emit_stop(link);
1a6bb31f 720 link_free_engines(link);
68a8723c 721 free(link->lease_file);
49699bac
SS		 722 free(link->lldp_file);
723
c166a070 724 free(link->ifname);
572b21d9 725 strv_free(link->alternative_names);
ceac4078 726 free(link->kind);
8d968fdd 727 free(link->ssid);
6cad256d 728
db2f8a2e 729 (void) unlink(link->state_file);
fe8db0c5 730 free(link->state_file);
c166a070 731
51517f9e 732 sd_device_unref(link->sd_device);
b5db00e5 733
0d4ad91d 734 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 735 hashmap_free(link->bound_by_links);
736
5f707e12 737 set_free_with_destructor(link->slaves, link_unref);
033295c1 738
c9c908a6
YW		 739 network_unref(link->network);
740
8301aa0b 741 return mfree(link);
14b746f7
TG		 742}
743
8301aa0b 744DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 745
11a7f229
TG		 746int link_get(Manager *m, int ifindex, Link **ret) {
747 Link *link;
11a7f229
TG		 748
749 assert(m);
11a7f229
TG		 750 assert(ifindex);
751 assert(ret);
752
ae06ab10 753 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 754 if (!link)
755 return -ENODEV;
756
757 *ret = link;
758
759 return 0;
760}
761
af9ba57a 762void link_set_state(Link *link, LinkState state) {
e331e246
TG		 763 assert(link);
764
765 if (link->state == state)
766 return;
767
0beb9542
YW		 768 log_link_debug(link, "State changed: %s -> %s",
769 link_state_to_string(link->state),
770 link_state_to_string(state));
771
e331e246
TG		 772 link->state = state;
773
774 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 775}
776
57bd6899
TG		 777static void link_enter_unmanaged(Link *link) {
778 assert(link);
779
e331e246 780 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 781
84de38c5 782 link_dirty(link);
57bd6899
TG		 783}
784
95355a28 785int link_stop_clients(Link *link, bool may_keep_dhcp) {
111bb8f9 786 int r = 0, k;
051e77ca 787 Address *ad;
111bb8f9
TG		 788
789 assert(link);
790 assert(link->manager);
791 assert(link->manager->event);
792
d03073dd
YW		 793 dhcp4_release_old_lease(link);
794
80060352
ZJS		 795 bool keep_dhcp = may_keep_dhcp &&
796 link->network &&
797 (link->manager->restarting ||
798 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
799
800 if (link->dhcp_client && !keep_dhcp) {
111bb8f9 801 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 802 if (k < 0)
36c7d709 803 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 804 }
805
ba179154 806 if (link->ipv4ll) {
111bb8f9 807 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 808 if (k < 0)
36c7d709 809 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 810 }
811
051e77ca
SS		 812 if (link->network)
813 LIST_FOREACH(addresses, ad, link->network->static_addresses)
814 if (ad->acd && sd_ipv4acd_is_running(ad->acd) == 0) {
815 k = sd_ipv4acd_stop(ad->acd);
816 if (k < 0)
817 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
818 }
819
f5a8c43f
TG		 820 if (link->dhcp6_client) {
821 k = sd_dhcp6_client_stop(link->dhcp6_client);
822 if (k < 0)
36c7d709 823 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 824 }
4138fb2c 825
1e7a0e21
LP		 826 if (link->ndisc) {
827 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 828 if (k < 0)
36c7d709 829 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 830 }
831
7465dd22
PF		 832 if (link->radv) {
833 k = sd_radv_stop(link->radv);
834 if (k < 0)
835 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
836 }
837
7272b25e 838 link_lldp_emit_stop(link);
111bb8f9
TG		 839 return r;
840}
841
b22d8a00 842void link_enter_failed(Link *link) {
ef1ba606 843 assert(link);
f882c247 844
370e9930 845 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 846 return;
847
6a7a4e4d 848 log_link_warning(link, "Failed");
449f7554 849
e331e246 850 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 851
95355a28 852 link_stop_clients(link, false);
111bb8f9 853
84de38c5 854 link_dirty(link);
f882c247
TG		 855}
856
7033af49
YW		 857static int link_join_netdevs_after_configured(Link *link) {
858 NetDev *netdev;
859 Iterator i;
860 int r;
861
862 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
863 if (netdev->ifindex > 0)
864 /* Assume already enslaved. */
865 continue;
866
867 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
868 continue;
869
870 log_struct(LOG_DEBUG,
871 LOG_LINK_INTERFACE(link),
872 LOG_NETDEV_INTERFACE(netdev),
873 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
874
875 r = netdev_join(netdev, link, NULL);
876 if (r < 0)
877 return log_struct_errno(LOG_WARNING, r,
878 LOG_LINK_INTERFACE(link),
879 LOG_NETDEV_INTERFACE(netdev),
880 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
881 }
882
883 return 0;
884}
885
e3a7b048 886static void link_enter_configured(Link *link) {
dd43110f
TG		 887 assert(link);
888 assert(link->network);
e3a7b048 889
289e6774 890 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 891 return;
dd43110f 892
e331e246 893 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 894
7033af49
YW		 895 (void) link_join_netdevs_after_configured(link);
896
84de38c5 897 link_dirty(link);
dd43110f
TG		 898}
899
47079967 900static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 901 RoutingPolicyRule *rule, *rrule = NULL;
902 int r;
903
904 assert(link);
905 assert(link->network);
906
2428613f
YW		 907 link->routing_policy_rules_configured = false;
908
8a9b3a23 909 LIST_FOREACH(rules, rule, link->network->rules) {
b80a511b 910 r = routing_policy_rule_get(link->manager, rule, &rrule);
ff14e2eb
YW		 911 if (r >= 0) {
912 if (r == 0)
913 (void) routing_policy_rule_make_local(link->manager, rrule);
8a9b3a23
SS		 914 continue;
915 }
916
9f08a578 917 r = routing_policy_rule_configure(rule, link, NULL);
4ff296b0
YW		 918 if (r < 0)
919 return log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
7ef7e550
YW		 920 if (r > 0)
921 link->routing_policy_rule_messages++;
8a9b3a23
SS		 922 }
923
924 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 925 if (link->routing_policy_rule_messages == 0) {
926 link->routing_policy_rules_configured = true;
927 link_check_ready(link);
b425c3ae 928 } else {
7715629e 929 log_link_debug(link, "Setting routing policy rules");
b425c3ae
YW		 930 link_set_state(link, LINK_STATE_CONFIGURING);
931 }
8a9b3a23
SS		 932
933 return 0;
934}
935
c16c7808
SS		 936static int nexthop_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
937 int r;
938
939 assert(link);
940 assert(link->nexthop_messages > 0);
941 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
942 LINK_STATE_FAILED, LINK_STATE_LINGER));
943
944 link->nexthop_messages--;
945
946 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
947 return 1;
948
949 r = sd_netlink_message_get_errno(m);
950 if (r < 0 && r != -EEXIST) {
5ecb131d 951 log_link_message_warning_errno(link, m, r, "Could not set nexthop");
c16c7808
SS		 952 link_enter_failed(link);
953 return 1;
954 }
955
956 if (link->nexthop_messages == 0) {
957 log_link_debug(link, "Nexthop set");
958 link->static_nexthops_configured = true;
959 link_check_ready(link);
960 }
961
962 return 1;
963}
964
965int link_request_set_nexthop(Link *link) {
966 NextHop *nh;
967 int r;
968
969 LIST_FOREACH(nexthops, nh, link->network->static_nexthops) {
970 r = nexthop_configure(nh, link, nexthop_handler);
971 if (r < 0)
972 return log_link_warning_errno(link, r, "Could not set nexthop: %m");
973 if (r > 0)
974 link->nexthop_messages++;
975 }
976
977 if (link->nexthop_messages == 0) {
978 link->static_nexthops_configured = true;
979 link_check_ready(link);
980 } else {
981 log_link_debug(link, "Setting nexthop");
982 link_set_state(link, LINK_STATE_CONFIGURING);
983 }
984
985 return 1;
986}
987
302a796f 988static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 989 int r;
990
1046bf9b 991 assert(link);
7715629e 992 assert(link->route_messages > 0);
289e6774
WKI		 993 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
994 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 995
7715629e 996 link->route_messages--;
f882c247 997
77a008c0 998 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 999 return 1;
1000
1c4baffc 1001 r = sd_netlink_message_get_errno(m);
4ff296b0 1002 if (r < 0 && r != -EEXIST) {
5ecb131d 1003 log_link_message_warning_errno(link, m, r, "Could not set route");
4ff296b0
YW		 1004 link_enter_failed(link);
1005 return 1;
1006 }
f882c247 1007
7715629e 1008 if (link->route_messages == 0) {
6a7a4e4d 1009 log_link_debug(link, "Routes set");
7715629e 1010 link->static_routes_configured = true;
8012cd39 1011 link_check_ready(link);
dd3efc09 1012 }
f882c247
TG		 1013
1014 return 1;
1015}
1016
b5799eeb 1017int link_request_set_routes(Link *link) {
bf61b05a
LP		 1018 enum {
1019 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
1020 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
1021 _PHASE_MAX
1022 } phase;
a6cc569e 1023 Route *rt;
f882c247
TG		 1024 int r;
1025
1026 assert(link);
1027 assert(link->network);
c42ff3a1
WKI		 1028 assert(link->addresses_configured);
1029 assert(link->address_messages == 0);
289e6774 1030 assert(link->state != _LINK_STATE_INVALID);
f882c247 1031
2428613f 1032 link->static_routes_configured = false;
c16c7808 1033 link->static_routes_ready = false;
27c34f73 1034
4e2ef9d9
YW		 1035 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
1036 /* During configuring addresses, the link lost its carrier. As networkd is dropping
1037 * the addresses now, let's not configure the routes either. */
1038 return 0;
1039
47079967 1040 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 1041 if (r < 0)
1042 return r;
f882c247 1043
bf61b05a
LP		 1044 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
1045 for (phase = 0; phase < _PHASE_MAX; phase++)
1046 LIST_FOREACH(routes, rt, link->network->static_routes) {
1985c54f
YW		 1047 if (rt->gateway_from_dhcp)
1048 continue;
0d34228f 1049
6ff5cc6b 1050 if ((in_addr_is_null(rt->family, &rt->gw) && ordered_set_isempty(rt->multipath_routes)) != (phase == PHASE_NON_GATEWAY))
bf61b05a 1051 continue;
a6cc569e 1052
0d34228f 1053 r = route_configure(rt, link, route_handler);
4ff296b0
YW		 1054 if (r < 0)
1055 return log_link_warning_errno(link, r, "Could not set routes: %m");
c4423317
YW		 1056 if (r > 0)
1057 link->route_messages++;
0d34228f 1058 }
f5be5601 1059
7715629e
ST		 1060 if (link->route_messages == 0) {
1061 link->static_routes_configured = true;
8012cd39 1062 link_check_ready(link);
b425c3ae 1063 } else {
6a7a4e4d 1064 log_link_debug(link, "Setting routes");
b425c3ae
YW		 1065 link_set_state(link, LINK_STATE_CONFIGURING);
1066 }
f882c247
TG		 1067
1068 return 0;
1069}
1070
6accfd31
DA		 1071void link_check_ready(Link *link) {
1072 Address *a;
1073 Iterator i;
4ff296b0 1074 int r;
6accfd31
DA		 1075
1076 assert(link);
1077
1078 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1079 return;
1080
1081 if (!link->network)
1082 return;
1083
1084 if (!link->addresses_configured)
1085 return;
1086
1087 if (!link->neighbors_configured)
1088 return;
1089
6aa5773b
DA		 1090 SET_FOREACH(a, link->addresses, i)
1091 if (!address_is_ready(a))
1092 return;
1093
1094 if (!link->addresses_ready) {
1095 link->addresses_ready = true;
4ff296b0
YW		 1096 r = link_request_set_routes(link);
1097 if (r < 0)
1098 link_enter_failed(link);
710ce9e5 1099 return;
6aa5773b
DA		 1100 }
1101
6accfd31
DA		 1102 if (!link->static_routes_configured)
1103 return;
1104
c16c7808
SS		 1105 if (!link->static_routes_ready) {
1106 link->static_routes_ready = true;
1107 r = link_request_set_nexthop(link);
1108 if (r < 0)
1109 link_enter_failed(link);
1110 return;
1111 }
1112
1113 if (!link->static_nexthops_configured)
1114 return;
1115
6accfd31
DA		 1116 if (!link->routing_policy_rules_configured)
1117 return;
1118
4ecdcb07
YW		 1119 if (!link->qdiscs_configured)
1120 return;
1121
463797c1 1122 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
6accfd31 1123
2aa7d367 1124 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !link->ipv4ll_address)
463797c1 1125 return;
6accfd31 1126
463797c1
YW		 1127 if (link_ipv6ll_enabled(link) &&
1128 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
1129 return;
6accfd31 1130
463797c1
YW		 1131 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
1132 !link->dhcp4_configured &&
1133 !link->dhcp6_configured &&
2aa7d367 1134 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address))
463797c1
YW		 1135 /* When DHCP is enabled, at least one protocol must provide an address, or
1136 * an IPv4ll fallback address must be configured. */
1137 return;
1138
1139 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
1140 return;
1141 }
6accfd31 1142
6accfd31
DA		 1143 if (link->state != LINK_STATE_CONFIGURED)
1144 link_enter_configured(link);
1145
1146 return;
1147}
1148
e4a71bf3
WKI		 1149static int link_request_set_neighbors(Link *link) {
1150 Neighbor *neighbor;
1151 int r;
1152
1153 assert(link);
1154 assert(link->network);
1155 assert(link->state != _LINK_STATE_INVALID);
1156
2428613f 1157 link->neighbors_configured = false;
e4a71bf3
WKI		 1158
1159 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
1160 r = neighbor_configure(neighbor, link, NULL);
4ff296b0
YW		 1161 if (r < 0)
1162 return log_link_warning_errno(link, r, "Could not set neighbor: %m");
e4a71bf3
WKI		 1163 }
1164
1165 if (link->neighbor_messages == 0) {
1166 link->neighbors_configured = true;
1167 link_check_ready(link);
b425c3ae 1168 } else {
e4a71bf3 1169 log_link_debug(link, "Setting neighbors");
b425c3ae
YW		 1170 link_set_state(link, LINK_STATE_CONFIGURING);
1171 }
e4a71bf3
WKI		 1172
1173 return 0;
1174}
1175
302a796f 1176static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1177 int r;
1178
4958aee4 1179 assert(rtnl);
f5be5601
TG		 1180 assert(m);
1181 assert(link);
1182 assert(link->ifname);
7715629e 1183 assert(link->address_messages > 0);
289e6774 1184 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1185 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1186
7715629e 1187 link->address_messages--;
f882c247 1188
5da8149f 1189 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1190 return 1;
1191
1c4baffc 1192 r = sd_netlink_message_get_errno(m);
4ff296b0 1193 if (r < 0 && r != -EEXIST) {
5ecb131d 1194 log_link_message_warning_errno(link, m, r, "Could not set address");
4ff296b0
YW		 1195 link_enter_failed(link);
1196 return 1;
1197 } else if (r >= 0)
1198 (void) manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1199
7715629e 1200 if (link->address_messages == 0) {
6a7a4e4d 1201 log_link_debug(link, "Addresses set");
c42ff3a1 1202 link->addresses_configured = true;
6aa5773b 1203 link_check_ready(link);
dd3efc09 1204 }
f882c247
TG		 1205
1206 return 1;
1207}
1208
f6bb7ac5
TJ		 1209static int link_set_bridge_fdb(Link *link) {
1210 FdbEntry *fdb_entry;
197e2809 1211 int r;
f6bb7ac5
TJ		 1212
1213 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1214 r = fdb_entry_configure(link, fdb_entry);
197e2809 1215 if (r < 0)
f6bb7ac5 1216 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1217 }
1218
197e2809 1219 return 0;
f6bb7ac5
TJ		 1220}
1221
289e6774 1222static int link_request_set_addresses(Link *link) {
95b74ef6 1223 AddressLabel *label;
a6cc569e 1224 Address *ad;
f882c247
TG		 1225 int r;
1226
1227 assert(link);
1228 assert(link->network);
f5be5601 1229 assert(link->state != _LINK_STATE_INVALID);
f882c247 1230
2428613f
YW		 1231 /* Reset all *_configured flags we are configuring. */
1232 link->addresses_configured = false;
6aa5773b 1233 link->addresses_ready = false;
2428613f
YW		 1234 link->neighbors_configured = false;
1235 link->static_routes_configured = false;
c16c7808
SS		 1236 link->static_routes_ready = false;
1237 link->static_nexthops_configured = false;
2428613f
YW		 1238 link->routing_policy_rules_configured = false;
1239
f6bb7ac5
TJ		 1240 r = link_set_bridge_fdb(link);
1241 if (r < 0)
1242 return r;
1243
f3ef324d
YW		 1244 r = link_request_set_neighbors(link);
1245 if (r < 0)
1246 return r;
e4a71bf3 1247
3d3d4255 1248 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1249 bool update;
1250
1251 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1252
1253 r = address_configure(ad, link, address_handler, update);
4ff296b0
YW		 1254 if (r < 0)
1255 return log_link_warning_errno(link, r, "Could not set addresses: %m");
54a1a535
YW		 1256 if (r > 0)
1257 link->address_messages++;
95b74ef6
SS		 1258 }
1259
1260 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1261 r = address_label_configure(label, link, NULL, false);
4ff296b0
YW		 1262 if (r < 0)
1263 return log_link_warning_errno(link, r, "Could not set address label: %m");
f5be5601 1264
7715629e 1265 link->address_label_messages++;
f882c247
TG		 1266 }
1267
d4cdbea5
TG		 1268 /* now that we can figure out a default address for the dhcp server,
1269 start it */
708c425d 1270 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
8fcf1d61 1271 r = dhcp4_server_configure(link);
4ff296b0 1272 if (r < 0)
d4cdbea5 1273 return r;
6a7a4e4d 1274 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1275 }
1276
c42ff3a1
WKI		 1277 if (link->address_messages == 0) {
1278 link->addresses_configured = true;
6aa5773b 1279 link_check_ready(link);
b425c3ae 1280 } else {
6a7a4e4d 1281 log_link_debug(link, "Setting addresses");
b425c3ae
YW		 1282 link_set_state(link, LINK_STATE_CONFIGURING);
1283 }
431ca2ce 1284
f882c247
TG		 1285 return 0;
1286}
1287
13b498f9 1288static int link_set_bridge_vlan(Link *link) {
86e2be7b 1289 int r;
13b498f9
TJ		 1290
1291 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1292 if (r < 0)
1293 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1294
1295 return r;
1296}
1297
a60a720c 1298static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1299 int r;
1300
1301 if (!link_proxy_arp_enabled(link))
1302 return 0;
1303
62e021a9 1304 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1305 if (r < 0)
1306 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1307
1308 return 0;
1309}
1310
3a390124 1311static int link_configure_continue(Link *link);
55dc8c4a 1312
302a796f 1313static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1314 int r;
1315
1316 assert(m);
1317 assert(link);
1318 assert(link->ifname);
1319
55dc8c4a
YW		 1320 link->setting_mtu = false;
1321
5da8149f 1322 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1323 return 1;
1324
1c4baffc 1325 r = sd_netlink_message_get_errno(m);
4ff296b0 1326 if (r < 0)
5ecb131d 1327 log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring");
4ff296b0
YW		 1328 else
1329 log_link_debug(link, "Setting MTU done.");
55dc8c4a 1330
4ff296b0 1331 if (link->state == LINK_STATE_INITIALIZED) {
3a390124 1332 r = link_configure_continue(link);
4ff296b0
YW		 1333 if (r < 0)
1334 link_enter_failed(link);
1335 }
4f882b2a
TG		 1336
1337 return 1;
1338}
1339
933c70a0 1340int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1341 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1342 int r;
1343
1344 assert(link);
1345 assert(link->manager);
1346 assert(link->manager->rtnl);
1347
40288ece
YW		 1348 if (mtu == 0 || link->setting_mtu)
1349 return 0;
1350
933c70a0 1351 if (link->mtu == mtu)
ee493106
YW		 1352 return 0;
1353
6a7a4e4d 1354 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1355
6a7a4e4d
LP		 1356 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1357 if (r < 0)
1358 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1359
44b598a1 1360 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1361 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1362 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1363
1364 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
d236718c 1365 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes");
44b598a1 1366
72c2500b 1367 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1368 }
1369
1c4baffc 1370 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1371 if (r < 0)
1372 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1373
302a796f
YW		 1374 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1375 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1376 if (r < 0)
1377 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1378
ae941762 1379 link_ref(link);
1046bf9b 1380 link->setting_mtu = true;
b226d99b 1381
4f882b2a
TG		 1382 return 0;
1383}
1384
f6fcc1c2
YW		 1385static bool link_reduces_vlan_mtu(Link *link) {
1386 /* See netif_reduces_vlan_mtu() in kernel. */
1387 return streq_ptr(link->kind, "macsec");
1388}
1389
1390static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1391 uint32_t mtu = 0;
1392 NetDev *dev;
1393 Iterator i;
1394
1395 HASHMAP_FOREACH(dev, link->network->stacked_netdevs, i)
1396 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1397 /* See vlan_dev_change_mtu() in kernel. */
1398 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1399
1400 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1401 /* See macvlan_change_mtu() in kernel. */
1402 mtu = dev->mtu;
1403
1404 return mtu;
1405}
1406
1407static int link_configure_mtu(Link *link) {
1408 uint32_t mtu;
1409
1410 assert(link);
1411 assert(link->network);
1412
1413 if (link->network->mtu > 0)
1414 return link_set_mtu(link, link->network->mtu);
1415
1416 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1417 if (link->mtu >= mtu)
1418 return 0;
1419
1420 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1421 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1422 link->mtu, mtu);
1423
1424 return link_set_mtu(link, mtu);
1425}
1426
302a796f 1427static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1428 int r;
1429
1430 assert(m);
1431 assert(link);
1432 assert(link->ifname);
1433
1434 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1435 return 1;
1436
1437 r = sd_netlink_message_get_errno(m);
1438 if (r < 0)
5ecb131d 1439 log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring");
99d2baa2
SS		 1440
1441 return 1;
1442}
1443
1444static int link_set_flags(Link *link) {
1445 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1446 unsigned ifi_change = 0;
1447 unsigned ifi_flags = 0;
1448 int r;
1449
1450 assert(link);
1451 assert(link->manager);
1452 assert(link->manager->rtnl);
1453
1454 if (link->flags & IFF_LOOPBACK)
1455 return 0;
1456
1457 if (!link->network)
1458 return 0;
1459
866e6b7a 1460 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1461 return 0;
1462
1463 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1464 if (r < 0)
1465 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1466
1467 if (link->network->arp >= 0) {
1468 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1469 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1470 }
1471
1472 if (link->network->multicast >= 0) {
1473 ifi_change |= IFF_MULTICAST;
1474 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1475 }
1476
866e6b7a
SS		 1477 if (link->network->allmulticast >= 0) {
1478 ifi_change |= IFF_ALLMULTI;
1479 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1480 }
1481
99d2baa2
SS		 1482 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1483 if (r < 0)
1484 return log_link_error_errno(link, r, "Could not set link flags: %m");
1485
302a796f
YW		 1486 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1487 link_netlink_destroy_callback, link);
99d2baa2
SS		 1488 if (r < 0)
1489 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1490
1491 link_ref(link);
1492
1493 return 0;
1494}
1495
e7ab854c
TG		 1496static int link_acquire_ipv6_conf(Link *link) {
1497 int r;
1498
1499 assert(link);
1500
e7ab854c 1501 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1502 assert(link->ndisc);
e7ab854c
TG		 1503
1504 log_link_debug(link, "Discovering IPv6 routers");
1505
1e7a0e21 1506 r = sd_ndisc_start(link->ndisc);
63348d13 1507 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1508 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1509 }
1510
7465dd22
PF		 1511 if (link_radv_enabled(link)) {
1512 assert(link->radv);
1513 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1514
1515 log_link_debug(link, "Starting IPv6 Router Advertisements");
1516
1517 r = sd_radv_start(link->radv);
1518 if (r < 0 && r != -EBUSY)
1519 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1520 }
1521
10752343
PF		 1522 (void) dhcp6_request_prefix_delegation(link);
1523
e7ab854c
TG		 1524 return 0;
1525}
1526
6fc25497 1527static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1528 int r;
1529
1530 assert(link);
ff254138
TG		 1531 assert(link->manager);
1532 assert(link->manager->event);
1533
910feb78 1534 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1535 assert(link->ipv4ll);
ff254138 1536
6a7a4e4d 1537 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1538
1539 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1540 if (r < 0)
1541 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1542 }
1543
78c958f8 1544 if (link_dhcp4_enabled(link)) {
eb34d4af 1545 assert(link->dhcp_client);
ff254138 1546
6a7a4e4d 1547 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1548
5c1d3fc9 1549 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1550 if (r < 0)
1551 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1552 }
ff254138 1553
6fc25497
SS		 1554 return 0;
1555}
1556
1557static int link_acquire_conf(Link *link) {
1558 int r;
1559
1560 assert(link);
1561
1562 r = link_acquire_ipv4_conf(link);
1563 if (r < 0)
1564 return r;
1565
3f7cc080 1566 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1567 r = link_acquire_ipv6_conf(link);
1568 if (r < 0)
1569 return r;
1570 }
1571
7272b25e
LP		 1572 if (link_lldp_emit_enabled(link)) {
1573 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1574 if (r < 0)
1575 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1576 }
1577
ff254138
TG		 1578 return 0;
1579}
1580
a61bb41c 1581bool link_has_carrier(Link *link) {
deb2e523
TG		 1582 /* see Documentation/networking/operstates.txt in the kernel sources */
1583
a61bb41c 1584 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1585 return true;
1586
a61bb41c 1587 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1588 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1589 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1590 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1591 return true;
1592
1593 return false;
1594}
1595
0e2fdb83
SS		 1596static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1597 int r;
1598
1599 assert(link);
1600
9524014e
DS		 1601 link->setting_genmode = false;
1602
0e2fdb83
SS		 1603 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1604 return 1;
1605
1606 r = sd_netlink_message_get_errno(m);
1607 if (r < 0)
5ecb131d 1608 log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring");
9524014e
DS		 1609 else
1610 log_link_debug(link, "Setting address genmode done.");
1611
1612 if (link->state == LINK_STATE_INITIALIZED) {
1613 r = link_configure_continue(link);
1614 if (r < 0)
1615 link_enter_failed(link);
1616 }
0e2fdb83
SS		 1617
1618 return 1;
1619}
1620
1621static int link_configure_addrgen_mode(Link *link) {
1622 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1623 uint8_t ipv6ll_mode;
1624 int r;
1625
1626 assert(link);
1627 assert(link->network);
1628 assert(link->manager);
1629 assert(link->manager->rtnl);
1630
9524014e 1631 if (!socket_ipv6_is_supported() || link->setting_genmode)
9f6e82e6
YW		 1632 return 0;
1633
0e2fdb83
SS		 1634 log_link_debug(link, "Setting address genmode for link");
1635
1636 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1637 if (r < 0)
1638 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1639
1640 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1641 if (r < 0)
1642 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1643
1644 r = sd_netlink_message_open_container(req, AF_INET6);
1645 if (r < 0)
1646 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1647
1648 if (!link_ipv6ll_enabled(link))
1649 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
826a3602 1650 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
0e2fdb83 1651 /* The file may not exist. And event if it exists, when stable_secret is unset,
826a3602
YW		 1652 * reading the file fails with EIO. */
1653 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1654 else
1655 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
0e2fdb83
SS		 1656
1657 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1658 if (r < 0)
1659 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1660
1661 r = sd_netlink_message_close_container(req);
1662 if (r < 0)
1663 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1664
1665 r = sd_netlink_message_close_container(req);
1666 if (r < 0)
1667 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1668
1669 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1670 link_netlink_destroy_callback, link);
1671 if (r < 0)
1672 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1673
1674 link_ref(link);
9524014e 1675 link->setting_genmode = true;
0e2fdb83
SS		 1676
1677 return 0;
1678}
1679
302a796f 1680static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1681 int r;
1682
1746cf2a
TG		 1683 assert(link);
1684
5da8149f 1685 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1686 return 1;
1687
1c4baffc 1688 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1689 if (r < 0)
26d6b214 1690 /* we warn but don't fail the link, as it may be brought up later */
5ecb131d 1691 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
45ad2c13 1692
f882c247
TG		 1693 return 1;
1694}
1695
1cc84f3b 1696static int link_up(Link *link) {
4afd3348 1697 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1698 int r;
1699
f882c247 1700 assert(link);
c106cc36 1701 assert(link->network);
f882c247
TG		 1702 assert(link->manager);
1703 assert(link->manager->rtnl);
1704
6a7a4e4d 1705 log_link_debug(link, "Bringing link up");
449f7554 1706
6a7a4e4d
LP		 1707 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1708 if (r < 0)
1709 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1710
2b2d8603 1711 /* set it free if not enslaved with networkd */
6cb955c6 1712 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1713 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1714 if (r < 0)
1715 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1716 }
1717
5d4795f3 1718 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1719 if (r < 0)
1720 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1721
c106cc36 1722 if (link->network->mac) {
1c4baffc 1723 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1724 if (r < 0)
1725 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1726 }
1727
302a796f
YW		 1728 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1729 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1730 if (r < 0)
1731 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1732
b226d99b
TG		 1733 link_ref(link);
1734
f882c247
TG		 1735 return 0;
1736}
1737
302a796f 1738static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1739 int r;
1740
1741 assert(link);
1742
1743 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1744 return 1;
1745
1c4baffc 1746 r = sd_netlink_message_get_errno(m);
0d4ad91d 1747 if (r < 0)
5ecb131d 1748 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
0d4ad91d
AR		 1749
1750 return 1;
1751}
1752
8e54db83 1753int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1754 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1755 int r;
1756
1757 assert(link);
1758 assert(link->manager);
1759 assert(link->manager->rtnl);
1760
6a7a4e4d 1761 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1762
1763 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1764 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1765 if (r < 0)
1766 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1767
1768 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1769 if (r < 0)
1770 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1771
8e54db83
YW		 1772 r = netlink_call_async(link->manager->rtnl, NULL, req,
1773 callback ?: link_down_handler,
302a796f 1774 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1775 if (r < 0)
1776 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1777
1778 link_ref(link);
1779
1780 return 0;
1781}
1782
1783static int link_handle_bound_to_list(Link *link) {
1784 Link *l;
1785 Iterator i;
1786 int r;
1787 bool required_up = false;
1788 bool link_is_up = false;
1789
1790 assert(link);
1791
1792 if (hashmap_isempty(link->bound_to_links))
1793 return 0;
1794
1795 if (link->flags & IFF_UP)
1796 link_is_up = true;
1797
1798 HASHMAP_FOREACH (l, link->bound_to_links, i)
1799 if (link_has_carrier(l)) {
1800 required_up = true;
1801 break;
1802 }
1803
1804 if (!required_up && link_is_up) {
8e54db83 1805 r = link_down(link, NULL);
0d4ad91d
AR		 1806 if (r < 0)
1807 return r;
1808 } else if (required_up && !link_is_up) {
1809 r = link_up(link);
1810 if (r < 0)
1811 return r;
1812 }
1813
1814 return 0;
1815}
1816
1817static int link_handle_bound_by_list(Link *link) {
1818 Iterator i;
1819 Link *l;
1820 int r;
1821
1822 assert(link);
1823
1824 if (hashmap_isempty(link->bound_by_links))
1825 return 0;
1826
1827 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1828 r = link_handle_bound_to_list(l);
1829 if (r < 0)
1830 return r;
1831 }
1832
1833 return 0;
1834}
1835
1836static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1837 int r;
1838
1839 assert(link);
1840 assert(carrier);
1841
1842 if (link == carrier)
1843 return 0;
1844
1845 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1846 return 0;
1847
1848 r = hashmap_ensure_allocated(h, NULL);
1849 if (r < 0)
1850 return r;
1851
1852 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1853 if (r < 0)
1854 return r;
1855
1856 return 0;
1857}
1858
1859static int link_new_bound_by_list(Link *link) {
1860 Manager *m;
1861 Link *carrier;
1862 Iterator i;
1863 int r;
1864 bool list_updated = false;
1865
1866 assert(link);
1867 assert(link->manager);
1868
1869 m = link->manager;
1870
b295beea 1871 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 1872 if (!carrier->network)
1873 continue;
1874
1875 if (strv_isempty(carrier->network->bind_carrier))
1876 continue;
1877
191a3f16 1878 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 1879 r = link_put_carrier(link, carrier, &link->bound_by_links);
1880 if (r < 0)
1881 return r;
1882
1883 list_updated = true;
1884 }
1885 }
1886
1887 if (list_updated)
84de38c5 1888 link_dirty(link);
0d4ad91d 1889
b295beea 1890 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 1891 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1892 if (r < 0)
1893 return r;
1894
84de38c5 1895 link_dirty(carrier);
0d4ad91d
AR		 1896 }
1897
1898 return 0;
1899}
1900
1901static int link_new_bound_to_list(Link *link) {
1902 Manager *m;
1903 Link *carrier;
1904 Iterator i;
1905 int r;
1906 bool list_updated = false;
1907
1908 assert(link);
1909 assert(link->manager);
1910
1911 if (!link->network)
1912 return 0;
1913
1914 if (strv_isempty(link->network->bind_carrier))
1915 return 0;
1916
1917 m = link->manager;
1918
1919 HASHMAP_FOREACH (carrier, m->links, i) {
191a3f16 1920 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 1921 r = link_put_carrier(link, carrier, &link->bound_to_links);
1922 if (r < 0)
1923 return r;
1924
1925 list_updated = true;
1926 }
1927 }
1928
1929 if (list_updated)
84de38c5 1930 link_dirty(link);
0d4ad91d
AR		 1931
1932 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
1933 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1934 if (r < 0)
1935 return r;
1936
84de38c5 1937 link_dirty(carrier);
0d4ad91d
AR		 1938 }
1939
1940 return 0;
1941}
1942
1943static int link_new_carrier_maps(Link *link) {
1944 int r;
1945
1946 r = link_new_bound_by_list(link);
1947 if (r < 0)
1948 return r;
1949
1950 r = link_handle_bound_by_list(link);
1951 if (r < 0)
1952 return r;
1953
1954 r = link_new_bound_to_list(link);
1955 if (r < 0)
1956 return r;
1957
1958 r = link_handle_bound_to_list(link);
1959 if (r < 0)
1960 return r;
1961
1962 return 0;
1963}
1964
1965static void link_free_bound_to_list(Link *link) {
1966 Link *bound_to;
1967 Iterator i;
1968
1969 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
1970 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
1971
1972 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 1973 link_dirty(bound_to);
0d4ad91d
AR		 1974 }
1975
1976 return;
1977}
1978
1979static void link_free_bound_by_list(Link *link) {
1980 Link *bound_by;
1981 Iterator i;
1982
1983 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
1984 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
1985
1986 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 1987 link_dirty(bound_by);
0d4ad91d
AR		 1988 link_handle_bound_to_list(bound_by);
1989 }
1990 }
1991
1992 return;
1993}
1994
1995static void link_free_carrier_maps(Link *link) {
1996 bool list_updated = false;
1997
1998 assert(link);
1999
2000 if (!hashmap_isempty(link->bound_to_links)) {
2001 link_free_bound_to_list(link);
2002 list_updated = true;
2003 }
2004
2005 if (!hashmap_isempty(link->bound_by_links)) {
2006 link_free_bound_by_list(link);
2007 list_updated = true;
2008 }
2009
2010 if (list_updated)
84de38c5 2011 link_dirty(link);
0d4ad91d
AR		 2012
2013 return;
2014}
2015
5f707e12
YW		 2016static int link_append_to_master(Link *link, NetDev *netdev) {
2017 Link *master;
2018 int r;
2019
2020 assert(link);
2021 assert(netdev);
2022
2023 r = link_get(link->manager, netdev->ifindex, &master);
2024 if (r < 0)
2025 return r;
2026
2027 r = set_ensure_allocated(&master->slaves, NULL);
2028 if (r < 0)
2029 return r;
2030
2031 r = set_put(master->slaves, link);
38288f0b 2032 if (r <= 0)
5f707e12
YW		 2033 return r;
2034
2035 link_ref(link);
2036 return 0;
2037}
2038
2039static void link_drop_from_master(Link *link, NetDev *netdev) {
2040 Link *master;
2041
2042 assert(link);
2043
2044 if (!link->manager || !netdev)
2045 return;
2046
2047 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2048 return;
2049
2050 link_unref(set_remove(master->slaves, link));
2051}
2052
2053static void link_detach_from_manager(Link *link) {
2054 if (!link || !link->manager)
2055 return;
2056
2057 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2058 link_clean(link);
2059
2060 /* The following must be called at last. */
2061 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2062 link_unref(link);
2063}
2064
0d4ad91d
AR		 2065void link_drop(Link *link) {
2066 if (!link || link->state == LINK_STATE_LINGER)
2067 return;
2068
2069 link_set_state(link, LINK_STATE_LINGER);
2070
2071 link_free_carrier_maps(link);
2072
5f707e12
YW		 2073 if (link->network) {
2074 link_drop_from_master(link, link->network->bridge);
2075 link_drop_from_master(link, link->network->bond);
2076 }
2077
6a7a4e4d 2078 log_link_debug(link, "Link removed");
0d4ad91d 2079
db2f8a2e 2080 (void) unlink(link->state_file);
c4397d94 2081 link_detach_from_manager(link);
0d4ad91d
AR		 2082}
2083
3f265037 2084static int link_joined(Link *link) {
f882c247
TG		 2085 int r;
2086
ef1ba606 2087 assert(link);
f5be5601 2088 assert(link->network);
dd3efc09 2089
0d4ad91d
AR		 2090 if (!hashmap_isempty(link->bound_to_links)) {
2091 r = link_handle_bound_to_list(link);
2092 if (r < 0)
2093 return r;
2094 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2095 r = link_up(link);
2096 if (r < 0) {
2097 link_enter_failed(link);
2098 return r;
2099 }
ef1ba606 2100 }
f882c247 2101
9ed794a3 2102 if (link->network->bridge) {
e1853b00 2103 r = link_set_bridge(link);
6a7a4e4d
LP		 2104 if (r < 0)
2105 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 2106
2107 r = link_append_to_master(link, link->network->bridge);
2108 if (r < 0)
2109 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 2110 }
2111
eb64b435 2112 if (link->network->bond) {
7fcee284 2113 r = link_set_bond(link);
eb64b435
SS		 2114 if (r < 0)
2115 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2116
45e11abf 2117 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2118 if (r < 0)
2119 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2120 }
2121
ffff9abe
TJ		 2122 if (link->network->use_br_vlan &&
2123 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2124 r = link_set_bridge_vlan(link);
2125 if (r < 0)
2126 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2127 }
2128
c1835a42
RM		 2129 /* Skip setting up addresses until it gets carrier,
2130 or it would try to set addresses twice,
2131 which is bad for non-idempotent steps. */
dad2d78e 2132 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2133 return 0;
2134
b425c3ae 2135 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 2136 return link_request_set_addresses(link);
02b59d57
TG		 2137}
2138
302a796f 2139static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2140 int r;
2141
1746cf2a 2142 assert(link);
ef1ba606 2143 assert(link->network);
34bf3c00 2144 assert(link->enslaving > 0);
02b59d57 2145
313cefa1 2146 link->enslaving--;
52433f6b 2147
5da8149f 2148 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2149 return 1;
2150
1c4baffc 2151 r = sd_netlink_message_get_errno(m);
856f962c 2152 if (r < 0 && r != -EEXIST) {
5ecb131d 2153 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG		 2154 link_enter_failed(link);
2155 return 1;
4ff296b0
YW		 2156 }
2157
2158 log_link_debug(link, "Joined netdev");
02b59d57 2159
34bf3c00 2160 if (link->enslaving == 0) {
4ff296b0
YW		 2161 r = link_joined(link);
2162 if (r < 0)
2163 link_enter_failed(link);
34bf3c00 2164 }
02b59d57
TG		 2165
2166 return 1;
2167}
2168
3f265037 2169static int link_enter_join_netdev(Link *link) {
6a0a2f86 2170 NetDev *netdev;
672682a6 2171 Iterator i;
02b59d57
TG		 2172 int r;
2173
2174 assert(link);
2175 assert(link->network);
bd08ce56 2176 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2177
289e6774 2178 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2179
84de38c5 2180 link_dirty(link);
34bf3c00 2181 link->enslaving = 0;
02b59d57 2182
d9c67ea1 2183 if (link->network->bond) {
cbff7170
TJ		 2184 if (link->network->bond->state == NETDEV_STATE_READY &&
2185 link->network->bond->ifindex == link->master_ifindex)
2186 return link_joined(link);
2187
f2341e0a
LP		 2188 log_struct(LOG_DEBUG,
2189 LOG_LINK_INTERFACE(link),
2190 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2191 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2192
34bf3c00
YW		 2193 link->enslaving++;
2194
f2341e0a 2195 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2196 if (r < 0) {
f2341e0a
LP		 2197 log_struct_errno(LOG_WARNING, r,
2198 LOG_LINK_INTERFACE(link),
2199 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2200 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2201 link_enter_failed(link);
2202 return r;
2203 }
0ad6148e
MO		 2204 }
2205
d9c67ea1 2206 if (link->network->bridge) {
f2341e0a
LP		 2207 log_struct(LOG_DEBUG,
2208 LOG_LINK_INTERFACE(link),
2209 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2210 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2211
34bf3c00
YW		 2212 link->enslaving++;
2213
f2341e0a 2214 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2215 if (r < 0) {
f2341e0a
LP		 2216 log_struct_errno(LOG_WARNING, r,
2217 LOG_LINK_INTERFACE(link),
2218 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2219 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2220 link_enter_failed(link);
2221 return r;
2222 }
52433f6b
TG		 2223 }
2224
6cb955c6
AR		 2225 if (link->network->vrf) {
2226 log_struct(LOG_DEBUG,
2227 LOG_LINK_INTERFACE(link),
2228 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2229 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2230
34bf3c00
YW		 2231 link->enslaving++;
2232
6cb955c6
AR		 2233 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2234 if (r < 0) {
2235 log_struct_errno(LOG_WARNING, r,
2236 LOG_LINK_INTERFACE(link),
2237 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2238 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2239 link_enter_failed(link);
2240 return r;
2241 }
6cb955c6
AR		 2242 }
2243
6a0a2f86 2244 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2245
2b6db913
YW		 2246 if (netdev->ifindex > 0)
2247 /* Assume already enslaved. */
a63e5daa 2248 continue;
a63e5daa 2249
7033af49
YW		 2250 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2251 continue;
2252
f2341e0a
LP		 2253 log_struct(LOG_DEBUG,
2254 LOG_LINK_INTERFACE(link),
2255 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2256 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2257
34bf3c00
YW		 2258 link->enslaving++;
2259
f2341e0a 2260 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2261 if (r < 0) {
f2341e0a
LP		 2262 log_struct_errno(LOG_WARNING, r,
2263 LOG_LINK_INTERFACE(link),
2264 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2265 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2266 link_enter_failed(link);
2267 return r;
2268 }
326cb406
SS		 2269 }
2270
34bf3c00
YW		 2271 if (link->enslaving == 0)
2272 return link_joined(link);
2273
ef1ba606
TG		 2274 return 0;
2275}
2276
769d324c 2277static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2278 int r;
2279
765afd5c 2280 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2281 return 0;
2282
765afd5c
LP		 2283 /* We propagate the forwarding flag from one interface to the
2284 * global setting one way. This means: as long as at least one
2285 * interface was configured at any time that had IP forwarding
2286 * enabled the setting will stay on for good. We do this
2287 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2288 * somewhat in sync (see below). */
15dee3f0 2289
62e021a9 2290 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2291 if (r < 0)
765afd5c 2292 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2293
769d324c
LP		 2294 return 0;
2295}
2296
2297static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2298 int r;
2299
765afd5c 2300 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2301 return 0;
2302
61233823 2303 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2304 * packet forwarding setting: either packet forwarding is on
2305 * for all, or off for all. We hence don't bother with a
2306 * per-interface setting, but simply propagate the interface
2307 * flag, if it is set, to the global flag, one-way. Note that
2308 * while IPv4 would allow a per-interface flag, we expose the
2309 * same behaviour there and also propagate the setting from
2310 * one to all, to keep things simple (see above). */
15dee3f0 2311
62e021a9 2312 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2313 if (r < 0)
765afd5c 2314 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2315
2316 return 0;
2317}
2318
49092e22 2319static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2320 IPv6PrivacyExtensions s;
49092e22
SS		 2321 int r;
2322
1f0d9695 2323 s = link_ipv6_privacy_extensions(link);
66a6bd68 2324 if (s < 0)
49092e22
SS		 2325 return 0;
2326
62e021a9 2327 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2328 if (r < 0)
49092e22
SS		 2329 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2330
2331 return 0;
2332}
2333
4f2e437a 2334static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2335 int r;
2336
2337 /* Make this a NOP if IPv6 is not available */
2338 if (!socket_ipv6_is_supported())
2339 return 0;
2340
2341 if (link->flags & IFF_LOOPBACK)
2342 return 0;
2343
d68e2e59
LP		 2344 if (!link->network)
2345 return 0;
2346
62e021a9 2347 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2348 if (r < 0)
fe307276 2349 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2350
2351 return 0;
2352}
2353
8749cbcd 2354static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2355 int r;
2356
2357 /* Make this a NOP if IPv6 is not available */
2358 if (!socket_ipv6_is_supported())
2359 return 0;
2360
2361 if (link->flags & IFF_LOOPBACK)
2362 return 0;
2363
d68e2e59
LP		 2364 if (!link->network)
2365 return 0;
2366
8749cbcd
SS		 2367 if (link->network->ipv6_dad_transmits < 0)
2368 return 0;
2369
62e021a9 2370 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2371 if (r < 0)
8749cbcd 2372 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2373
2374 return 0;
2375}
2376
b69c3180 2377static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2378 int r;
2379
2380 /* Make this a NOP if IPv6 is not available */
2381 if (!socket_ipv6_is_supported())
2382 return 0;
2383
2384 if (link->flags & IFF_LOOPBACK)
2385 return 0;
2386
d68e2e59
LP		 2387 if (!link->network)
2388 return 0;
2389
b69c3180
SS		 2390 if (link->network->ipv6_hop_limit < 0)
2391 return 0;
2392
62e021a9 2393 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2394 if (r < 0)
b69c3180 2395 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2396
2397 return 0;
2398}
2399
11102cba 2400static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2401 int r;
2402
2403 /* Make this a NOP if IPv6 is not available */
2404 if (!socket_ipv6_is_supported())
2405 return 0;
2406
2407 if (link->flags & IFF_LOOPBACK)
2408 return 0;
2409
2410 if (link->network->ipv6_mtu == 0)
2411 return 0;
2412
d236718c
DS		 2413 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
2414 * on the interface. Bump up IPv6 MTU bytes to IPV6_MTU_MIN. */
2415 if (link->network->ipv6_mtu < IPV6_MIN_MTU) {
2416 log_link_notice(link, "Bumping IPv6 MTU to "STRINGIFY(IPV6_MIN_MTU)" byte minimum required");
2417 link->network->ipv6_mtu = IPV6_MIN_MTU;
2418 }
2419
62e021a9 2420 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
d236718c
DS		 2421 if (r < 0) {
2422 if (link->mtu < link->network->ipv6_mtu)
2423 log_link_warning(link, "Cannot set IPv6 MTU %"PRIu32" higher than device MTU %"PRIu32,
2424 link->network->ipv6_mtu, link->mtu);
2425 else
2426 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2427 }
2428
2429 link->ipv6_mtu_set = true;
11102cba
SS		 2430
2431 return 0;
2432}
2433
30226d27
TJ		 2434static bool link_is_static_address_configured(Link *link, Address *address) {
2435 Address *net_address;
2436
2437 assert(link);
2438 assert(address);
2439
2440 if (!link->network)
2441 return false;
2442
2443 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2444 if (address_equal(net_address, address))
2445 return true;
2446
2447 return false;
2448}
2449
d1bdafd2
WKI		 2450static bool link_is_neighbor_configured(Link *link, Neighbor *neighbor) {
2451 Neighbor *net_neighbor;
2452
2453 assert(link);
2454 assert(neighbor);
2455
2456 if (!link->network)
2457 return false;
2458
2459 LIST_FOREACH(neighbors, net_neighbor, link->network->neighbors)
2460 if (neighbor_equal(net_neighbor, neighbor))
2461 return true;
2462
2463 return false;
2464}
2465
7ecf0c3e
TJ		 2466static bool link_is_static_route_configured(Link *link, Route *route) {
2467 Route *net_route;
2468
2469 assert(link);
2470 assert(route);
2471
2472 if (!link->network)
2473 return false;
2474
2475 LIST_FOREACH(routes, net_route, link->network->static_routes)
2476 if (route_equal(net_route, route))
2477 return true;
2478
2479 return false;
2480}
2481
db51778f
YW		 2482static bool link_address_is_dynamic(Link *link, Address *address) {
2483 Route *route;
2484 Iterator i;
2485
2486 assert(link);
2487 assert(address);
2488
2489 if (address->cinfo.ifa_prefered != CACHE_INFO_INFINITY_LIFE_TIME)
2490 return true;
2491
2492 /* Even when the address is leased from a DHCP server, networkd assign the address
2493 * without lifetime when KeepConfiguration=dhcp. So, let's check that we have
2494 * corresponding routes with RTPROT_DHCP. */
2495 SET_FOREACH(route, link->routes_foreign, i) {
2496 if (route->protocol != RTPROT_DHCP)
2497 continue;
2498
2499 if (address->family != route->family)
2500 continue;
2501
2502 if (in_addr_equal(address->family, &address->in_addr, &route->prefsrc))
2503 return true;
2504 }
2505
2506 return false;
2507}
2508
0917a271
DS		 2509static int link_enumerate_ipv6_tentative_addresses(Link *link) {
2510 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
2511 sd_netlink_message *addr;
2512 int r;
2513
2514 assert(link);
2515 assert(link->manager);
2516 assert(link->manager->rtnl);
2517
2518 r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_GETADDR, 0, AF_INET6);
2519 if (r < 0)
2520 return r;
2521
2522 r = sd_netlink_call(link->manager->rtnl, req, 0, &reply);
2523 if (r < 0)
2524 return r;
2525
2526 for (addr = reply; addr; addr = sd_netlink_message_next(addr)) {
2527 unsigned char flags;
2528 int ifindex;
2529
2530 r = sd_rtnl_message_addr_get_ifindex(addr, &ifindex);
2531 if (r < 0) {
2532 log_link_warning_errno(link, r, "rtnl: invalid ifindex, ignoring: %m");
2533 continue;
2534 } else if (link->ifindex != ifindex)
2535 continue;
2536
2537 r = sd_rtnl_message_addr_get_flags(addr, &flags);
2538 if (r < 0) {
2539 log_link_warning_errno(link, r, "rtnl: received address message with invalid flags, ignoring: %m");
2540 continue;
2541 } else if (!(flags & IFA_F_TENTATIVE))
2542 continue;
2543
2544 log_link_debug(link, "Found tentative ipv6 link-local address");
2545 (void) manager_rtnl_process_address(link->manager->rtnl, addr, link->manager);
2546 }
2547
2548 return 0;
2549}
2550
5e5b137a
TG		 2551static int link_drop_foreign_config(Link *link) {
2552 Address *address;
d1bdafd2 2553 Neighbor *neighbor;
5e5b137a
TG		 2554 Route *route;
2555 Iterator i;
2556 int r;
2557
0917a271
DS		 2558 /* The kernel doesn't notify us about tentative addresses;
2559 * so if ipv6ll is disabled, we need to enumerate them now so we can drop them below */
2560 if (!link_ipv6ll_enabled(link)) {
2561 r = link_enumerate_ipv6_tentative_addresses(link);
2562 if (r < 0)
2563 return r;
2564 }
2565
5e5b137a 2566 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2567 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2568 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
5e5b137a
TG		 2569 continue;
2570
db51778f 2571 if (link_address_is_dynamic(link, address)) {
b1b0b42e 2572 if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
db51778f 2573 continue;
b1b0b42e 2574 } else if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
db51778f
YW		 2575 continue;
2576
30226d27
TJ		 2577 if (link_is_static_address_configured(link, address)) {
2578 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2579 if (r < 0)
2580 return log_link_error_errno(link, r, "Failed to add address: %m");
2581 } else {
63ae0569 2582 r = address_remove(address, link, NULL);
30226d27
TJ		 2583 if (r < 0)
2584 return r;
2585 }
5e5b137a
TG		 2586 }
2587
d1bdafd2
WKI		 2588 SET_FOREACH(neighbor, link->neighbors_foreign, i) {
2589 if (link_is_neighbor_configured(link, neighbor)) {
2590 r = neighbor_add(link, neighbor->family, &neighbor->in_addr, &neighbor->lladdr, neighbor->lladdr_size, NULL);
2591 if (r < 0)
2592 return r;
2593 } else {
2594 r = neighbor_remove(neighbor, link, NULL);
2595 if (r < 0)
2596 return r;
2597 }
2598 }
2599
5e5b137a 2600 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2601 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2602 if (route->protocol == RTPROT_KERNEL)
2603 continue;
2604
bd7d6cec
YW		 2605 /* do not touch multicast route added by kernel */
2606 /* FIXME: Why the kernel adds this route with protocol RTPROT_BOOT??? We need to investigate that.
2607 * https://tools.ietf.org/html/rfc4862#section-5.4 may explain why. */
2608 if (route->protocol == RTPROT_BOOT &&
2609 route->family == AF_INET6 &&
2610 route->dst_prefixlen == 8 &&
2611 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 }}} }))
2612 continue;
2613
b1b0b42e 2614 if (route->protocol == RTPROT_STATIC && link->network &&
db51778f
YW		 2615 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2616 continue;
2617
b1b0b42e 2618 if (route->protocol == RTPROT_DHCP && link->network &&
db51778f
YW		 2619 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2620 continue;
2621
7ecf0c3e 2622 if (link_is_static_route_configured(link, route)) {
f1368755 2623 r = route_add(link, route, NULL);
7ecf0c3e
TJ		 2624 if (r < 0)
2625 return r;
2626 } else {
4645ad47 2627 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2628 if (r < 0)
2629 return r;
2630 }
5e5b137a
TG		 2631 }
2632
2633 return 0;
2634}
2635
3104883d 2636static int link_drop_config(Link *link) {
410a7f15 2637 Address *address, *pool_address;
d1bdafd2 2638 Neighbor *neighbor;
3104883d
SS		 2639 Route *route;
2640 Iterator i;
2641 int r;
2642
2643 SET_FOREACH(address, link->addresses, i) {
2644 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2645 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
3104883d
SS		 2646 continue;
2647
63ae0569 2648 r = address_remove(address, link, NULL);
3104883d
SS		 2649 if (r < 0)
2650 return r;
410a7f15
RM		 2651
2652 /* If this address came from an address pool, clean up the pool */
2653 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2654 if (address_equal(address, pool_address)) {
2655 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2656 address_free(pool_address);
2657 break;
2658 }
2659 }
3104883d
SS		 2660 }
2661
d1bdafd2
WKI		 2662 SET_FOREACH(neighbor, link->neighbors, i) {
2663 r = neighbor_remove(neighbor, link, NULL);
2664 if (r < 0)
2665 return r;
2666 }
2667
3104883d
SS		 2668 SET_FOREACH(route, link->routes, i) {
2669 /* do not touch routes managed by the kernel */
2670 if (route->protocol == RTPROT_KERNEL)
2671 continue;
2672
4645ad47 2673 r = route_remove(route, link, NULL);
3104883d
SS		 2674 if (r < 0)
2675 return r;
2676 }
2677
c69305ff
LP		 2678 ndisc_flush(link);
2679
3104883d
SS		 2680 return 0;
2681}
2682
051e77ca
SS		 2683static int link_configure_ipv4_dad(Link *link) {
2684 Address *address;
2685 int r;
2686
2687 assert(link);
2688 assert(link->network);
2689
2690 LIST_FOREACH(addresses, address, link->network->static_addresses)
2691 if (address->family == AF_INET &&
2692 FLAGS_SET(address->duplicate_address_detection, ADDRESS_FAMILY_IPV4)) {
2693 r = configure_ipv4_duplicate_address_detection(link, address);
2694 if (r < 0)
2695 return log_link_error_errno(link, r, "Failed to configure IPv4ACD: %m");
2696 }
2697
2698 return 0;
2699}
2700
4ecdcb07 2701static int link_configure_qdiscs(Link *link) {
edc54f2f 2702 QDisc *qdisc;
0f5bd7fe 2703 Iterator i;
02b59d57
TG		 2704 int r;
2705
4ecdcb07
YW		 2706 link->qdiscs_configured = false;
2707 link->qdisc_messages = 0;
2708
2709 ORDERED_HASHMAP_FOREACH(qdisc, link->network->qdiscs_by_section, i) {
2710 r = qdisc_configure(link, qdisc);
2711 if (r < 0)
2712 return r;
2713 }
2714
2715 if (link->qdisc_messages == 0)
2716 link->qdiscs_configured = true;
2717 else
edc54f2f 2718 log_link_debug(link, "Configuring queuing discipline (qdisc)");
4ecdcb07
YW		 2719
2720 return 0;
2721}
2722
2723static int link_configure(Link *link) {
2724 int r;
2725
ef1ba606 2726 assert(link);
b22d8a00 2727 assert(link->network);
bd08ce56 2728 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2729
4ecdcb07
YW		 2730 r = link_configure_qdiscs(link);
2731 if (r < 0)
2732 return r;
2733
500b96eb 2734 if (link->iftype == ARPHRD_CAN)
93ea7750 2735 return link_configure_can(link);
92c918b0 2736
482efedc
SS		 2737 /* If IPv6 configured that is static IPv6 address and IPv6LL autoconfiguration is enabled
2738 * for this interface, then enable IPv6 */
57ad7607 2739 (void) link_update_ipv6_sysctl(link);
482efedc 2740
23d8b221
SS		 2741 r = link_set_proxy_arp(link);
2742 if (r < 0)
2743 return r;
2744
a0e5c15d
FK		 2745 r = ipv6_proxy_ndp_addresses_configure(link);
2746 if (r < 0)
2747 return r;
2748
769d324c
LP		 2749 r = link_set_ipv4_forward(link);
2750 if (r < 0)
2751 return r;
2752
2753 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2754 if (r < 0)
2755 return r;
2756
49092e22
SS		 2757 r = link_set_ipv6_privacy_extensions(link);
2758 if (r < 0)
2759 return r;
2760
4f2e437a
SS		 2761 r = link_set_ipv6_accept_ra(link);
2762 if (r < 0)
2763 return r;
2764
8749cbcd
SS		 2765 r = link_set_ipv6_dad_transmits(link);
2766 if (r < 0)
2767 return r;
b69c3180
SS		 2768
2769 r = link_set_ipv6_hop_limit(link);
2770 if (r < 0)
2771 return r;
8749cbcd 2772
99d2baa2
SS		 2773 r = link_set_flags(link);
2774 if (r < 0)
2775 return r;
2776
910feb78 2777 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
b22d8a00 2778 r = ipv4ll_configure(link);
eb34d4af
TG		 2779 if (r < 0)
2780 return r;
2781 }
2782
78c958f8 2783 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2784 r = dhcp4_set_promote_secondaries(link);
2785 if (r < 0)
2786 return r;
2787
3c9b8860 2788 r = dhcp4_configure(link);
eb34d4af
TG		 2789 if (r < 0)
2790 return r;
eb34d4af
TG		 2791 }
2792
78c958f8 2793 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2794 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2795 if (r < 0)
2796 return r;
2797
2798 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2799 if (r < 0)
2800 return r;
dd43110f
TG		 2801 }
2802
62379e88
TG		 2803 if (link_dhcp6_enabled(link) ||
2804 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2805 r = dhcp6_configure(link);
2806 if (r < 0)
2807 return r;
2808 }
2809
2810 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2811 r = ndisc_configure(link);
4138fb2c
PF		 2812 if (r < 0)
2813 return r;
2814 }
2815
7465dd22
PF		 2816 if (link_radv_enabled(link)) {
2817 r = radv_configure(link);
2818 if (r < 0)
2819 return r;
2820 }
2821
8e1ad1ea 2822 if (link_lldp_rx_enabled(link)) {
7f853950 2823 r = link_lldp_rx_configure(link);
273eec24
LP		 2824 if (r < 0)
2825 return r;
ce43e484
SS		 2826 }
2827
f6fcc1c2 2828 r = link_configure_mtu(link);
40288ece
YW		 2829 if (r < 0)
2830 return r;
44b598a1 2831
9f6e82e6
YW		 2832 r = link_configure_addrgen_mode(link);
2833 if (r < 0)
2834 return r;
0e2fdb83 2835
051e77ca
SS		 2836 r = link_configure_ipv4_dad(link);
2837 if (r < 0)
2838 return r;
2839
3a390124
DS		 2840 return link_configure_continue(link);
2841}
2842
2843/* The configuration continues in this separate function, instead of
2844 * including this in the above link_configure() function, for two
2845 * reasons:
2846 * 1) some devices reset the link when the mtu is set, which caused
2847 * an infinite loop here in networkd; see:
2848 * https://github.com/systemd/systemd/issues/6593
2849 * https://github.com/systemd/systemd/issues/9831
2850 * 2) if ipv6ll is disabled, then bringing the interface up must be
2851 * delayed until after we get confirmation from the kernel that
2852 * the addr_gen_mode parameter has been set (via netlink), see:
2853 * https://github.com/systemd/systemd/issues/13882
2854 */
2855static int link_configure_continue(Link *link) {
55dc8c4a
YW		 2856 int r;
2857
2858 assert(link);
2859 assert(link->network);
bd08ce56 2860 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a 2861
9524014e 2862 if (link->setting_mtu || link->setting_genmode)
55dc8c4a
YW		 2863 return 0;
2864
4c649652
DS		 2865 /* Drop foreign config, but ignore loopback or critical devices.
2866 * We do not want to remove loopback address or addresses used for root NFS. */
2867 if (!(link->flags & IFF_LOOPBACK) &&
2868 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
2869 r = link_drop_foreign_config(link);
2870 if (r < 0)
2871 return r;
2872 }
2873
d236718c
DS		 2874 /* The kernel resets ipv6 mtu after changing device mtu;
2875 * we must set this here, after we've set device mtu */
2876 r = link_set_ipv6_mtu(link);
2877 if (r < 0)
2878 return r;
2879
dad2d78e 2880 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2881 r = link_acquire_conf(link);
2882 if (r < 0)
2883 return r;
cc544d5f 2884 }
1e9be60b 2885
3f265037 2886 return link_enter_join_netdev(link);
505f8da7
TG		 2887}
2888
27dfc982
YW		 2889static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2890 assert(duid);
2891
2892 if (duid->raw_data_len > 0)
2893 return 0;
2894
2895 if (duid->type != DUID_TYPE_UUID)
2896 return -EINVAL;
2897
2898 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2899 duid->raw_data_len = sizeof(sd_id128_t);
2900
2901 return 1;
2902}
2903
2904int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2905 Manager *manager = userdata;
2906 const sd_bus_error *e;
2907 const void *a;
2908 size_t sz;
2909 DUID *duid;
2910 Link *link;
2911 int r;
2912
2913 assert(m);
2914 assert(manager);
2915
2916 e = sd_bus_message_get_error(m);
2917 if (e) {
2918 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 2919 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 2920 e->message);
2921 goto configure;
2922 }
2923
2924 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2925 if (r < 0)
2926 goto configure;
2927
2928 if (sz != sizeof(sd_id128_t)) {
ab4dd984 2929 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 2930 goto configure;
2931 }
2932
2933 memcpy(&manager->product_uuid, a, sz);
2934 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2935 (void) duid_set_uuid(duid, manager->product_uuid);
2936
2937 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2938
2939configure:
2940 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3dc2e7af
YW		 2941 link_unref(link);
2942
27dfc982
YW		 2943 r = link_configure(link);
2944 if (r < 0)
4ff296b0 2945 link_enter_failed(link);
27dfc982
YW		 2946 }
2947
2948 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
2949
2950 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2951 * even if the method fails. */
2952 manager->has_product_uuid = true;
2953
2954 return 1;
2955}
2956
2957static bool link_requires_uuid(Link *link) {
2958 const DUID *duid;
2959
2960 assert(link);
2961 assert(link->manager);
2962 assert(link->network);
2963
2964 duid = link_get_duid(link);
2965 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
2966 return false;
2967
2968 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
2969 return true;
2970
2971 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
2972 return true;
2973
2974 return false;
2975}
2976
2977static int link_configure_duid(Link *link) {
2978 Manager *m;
2979 DUID *duid;
2980 int r;
2981
2982 assert(link);
2983 assert(link->manager);
2984 assert(link->network);
2985
2986 m = link->manager;
2987 duid = link_get_duid(link);
2988
2989 if (!link_requires_uuid(link))
2990 return 1;
2991
2992 if (m->has_product_uuid) {
2993 (void) duid_set_uuid(duid, m->product_uuid);
2994 return 1;
2995 }
2996
2997 if (!m->links_requesting_uuid) {
2998 r = manager_request_product_uuid(m, link);
2999 if (r < 0) {
3000 if (r == -ENOMEM)
3001 return r;
3002
ab4dd984
ZJS		 3003 log_link_warning_errno(link, r,
3004 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 3005 return 1;
3006 }
3007 } else {
3008 r = set_put(m->links_requesting_uuid, link);
3009 if (r < 0)
3010 return log_oom();
3011
3012 r = set_put(m->duids_requesting_uuid, duid);
3013 if (r < 0)
3014 return log_oom();
3dc2e7af
YW		 3015
3016 link_ref(link);
27dfc982
YW		 3017 }
3018
3019 return 0;
3020}
3021
572b21d9 3022static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
ad932b15
YW		 3023 Network *network;
3024 int r;
3025
3026 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
3027 return 0;
3028
572b21d9
YW		 3029 if (m) {
3030 _cleanup_strv_free_ char **s = NULL;
3031
3032 r = sd_netlink_message_get_errno(m);
3033 if (r < 0)
3034 return r;
3035
3036 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3037 if (r < 0 && r != -ENODATA)
3038 return r;
3039
3040 strv_free_and_replace(link->alternative_names, s);
3041 }
3042
3043 r = network_get(link->manager, link->sd_device, link->ifname, link->alternative_names,
4bb7cc82 3044 &link->mac, &link->permanent_mac, link->wlan_iftype, link->ssid, &link->bssid, &network);
ad932b15
YW		 3045 if (r == -ENOENT) {
3046 link_enter_unmanaged(link);
3047 return 0;
3048 } else if (r == 0 && network->unmanaged) {
3049 link_enter_unmanaged(link);
3050 return 0;
3051 } else if (r < 0)
3052 return r;
3053
99b8517c 3054 if (link->network == network && !force)
ad932b15
YW		 3055 return 0;
3056
3057 log_link_info(link, "Re-configuring with %s", network->filename);
3058
3059 /* Dropping old .network file */
3060 r = link_stop_clients(link, false);
572b21d9 3061 if (r < 0)
ad932b15 3062 return r;
ad932b15
YW		 3063
3064 if (link_dhcp4_server_enabled(link))
3065 (void) sd_dhcp_server_stop(link->dhcp_server);
3066
3067 r = link_drop_config(link);
3068 if (r < 0)
3069 return r;
3070
2c7b826d 3071 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
ad932b15
YW		 3072 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
3073 r = link_drop_foreign_config(link);
3074 if (r < 0)
3075 return r;
3076 }
3077
3078 link_free_carrier_maps(link);
3079 link_free_engines(link);
3080 link->network = network_unref(link->network);
3081
3082 /* Then, apply new .network file */
3083 r = network_apply(network, link);
3084 if (r < 0)
3085 return r;
3086
3087 r = link_new_carrier_maps(link);
3088 if (r < 0)
3089 return r;
3090
3091 link_set_state(link, LINK_STATE_INITIALIZED);
8ae7b8a1 3092 link_dirty(link);
ad932b15
YW		 3093
3094 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3095 * link_configure() is called later asynchronously. */
3096 r = link_configure_duid(link);
3097 if (r <= 0)
3098 return r;
3099
3100 r = link_configure(link);
3101 if (r < 0)
3102 return r;
3103
3104 return 0;
3105}
3106
572b21d9
YW		 3107static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3108 int r;
3109
3110 r = link_reconfigure_internal(link, m, false);
3111 if (r < 0)
3112 link_enter_failed(link);
3113
3114 return 1;
3115}
3116
3117static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3118 int r;
3119
3120 r = link_reconfigure_internal(link, m, true);
3121 if (r < 0)
3122 link_enter_failed(link);
3123
3124 return 1;
3125}
3126
3127int link_reconfigure(Link *link, bool force) {
3128 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
3129 int r;
3130
3131 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3132 link->ifindex);
3133 if (r < 0)
3134 return r;
3135
3136 r = netlink_call_async(link->manager->rtnl, NULL, req,
3137 force ? link_force_reconfigure_handler : link_reconfigure_handler,
3138 link_netlink_destroy_callback, link);
3139 if (r < 0)
3140 return r;
3141
3142 link_ref(link);
3143
3144 return 0;
3145}
3146
e6bf7774 3147static int link_initialized_and_synced(Link *link) {
505f8da7 3148 Network *network;
505f8da7
TG		 3149 int r;
3150
3151 assert(link);
3152 assert(link->ifname);
3153 assert(link->manager);
3154
bd08ce56
YW		 3155 /* We may get called either from the asynchronous netlink callback,
3156 * or directly for link_add() if running in a container. See link_add(). */
3157 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 3158 return 0;
505f8da7 3159
6a7a4e4d 3160 log_link_debug(link, "Link state is up-to-date");
bd08ce56 3161 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 3162
0d4ad91d
AR		 3163 r = link_new_bound_by_list(link);
3164 if (r < 0)
3165 return r;
3166
3167 r = link_handle_bound_by_list(link);
3168 if (r < 0)
3169 return r;
3170
c4a03a56 3171 if (!link->network) {
0894cfe4 3172 r = wifi_get_info(link);
8d968fdd
YW		 3173 if (r < 0)
3174 return r;
3175
572b21d9 3176 r = network_get(link->manager, link->sd_device, link->ifname, link->alternative_names,
4bb7cc82 3177 &link->mac, &link->permanent_mac, link->wlan_iftype, link->ssid, &link->bssid, &network);
c4a03a56
TG		 3178 if (r == -ENOENT) {
3179 link_enter_unmanaged(link);
4232cf04 3180 return 0;
a09dc546
DM		 3181 } else if (r == 0 && network->unmanaged) {
3182 link_enter_unmanaged(link);
3183 return 0;
c4a03a56
TG		 3184 } else if (r < 0)
3185 return r;
505f8da7 3186
c4a03a56
TG		 3187 if (link->flags & IFF_LOOPBACK) {
3188 if (network->link_local != ADDRESS_FAMILY_NO)
3189 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3190
c4a03a56
TG		 3191 if (network->dhcp != ADDRESS_FAMILY_NO)
3192 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3193
c4a03a56
TG		 3194 if (network->dhcp_server)
3195 log_link_debug(link, "Ignoring DHCP server for loopback link");
3196 }
bd2efe92 3197
7d342c03 3198 r = network_apply(network, link);
c4a03a56
TG		 3199 if (r < 0)
3200 return r;
3201 }
505f8da7 3202
0d4ad91d
AR		 3203 r = link_new_bound_to_list(link);
3204 if (r < 0)
3205 return r;
3206
27dfc982
YW		 3207 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3208 * link_configure() is called later asynchronously. */
3209 r = link_configure_duid(link);
3210 if (r <= 0)
3211 return r;
3212
a748b692
TG		 3213 r = link_configure(link);
3214 if (r < 0)
3215 return r;
3216
4232cf04 3217 return 0;
505f8da7
TG		 3218}
3219
302a796f 3220static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
572b21d9 3221 _cleanup_strv_free_ char **s = NULL;
4ff296b0
YW		 3222 int r;
3223
572b21d9
YW		 3224 r = sd_netlink_message_get_errno(m);
3225 if (r < 0) {
40681e5c 3226 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 3227 link_enter_failed(link);
3228 return 0;
3229 }
3230
3231 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3232 if (r < 0 && r != -ENODATA) {
3233 link_enter_failed(link);
3234 return 0;
3235 }
3236
3237 strv_free_and_replace(link->alternative_names, s);
3238
4ff296b0
YW		 3239 r = link_initialized_and_synced(link);
3240 if (r < 0)
3241 link_enter_failed(link);
e6bf7774
YW		 3242 return 1;
3243}
3244
51517f9e 3245int link_initialized(Link *link, sd_device *device) {
4afd3348 3246 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3247 int r;
3248
3249 assert(link);
3250 assert(link->manager);
3251 assert(link->manager->rtnl);
3252 assert(device);
3253
8434fd5c 3254 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3255 return 0;
3256
51517f9e 3257 if (link->sd_device)
679b3605
TG		 3258 return 0;
3259
79008bdd 3260 log_link_debug(link, "udev initialized link");
bd08ce56 3261 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 3262
51517f9e 3263 link->sd_device = sd_device_ref(device);
4f561e8e 3264
3c9b8860
TG		 3265 /* udev has initialized the link, but we don't know if we have yet
3266 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3267 * when it returns we know that the pending NEWLINKs have already been
3268 * processed and that we are up-to-date */
4f561e8e 3269
3c9b8860
TG		 3270 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3271 link->ifindex);
4f561e8e
TG		 3272 if (r < 0)
3273 return r;
3274
302a796f
YW		 3275 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3276 link_netlink_destroy_callback, link);
4f561e8e
TG		 3277 if (r < 0)
3278 return r;
3279
5da8149f
TG		 3280 link_ref(link);
3281
4f561e8e
TG		 3282 return 0;
3283}
3284
c4a03a56 3285static int link_load(Link *link) {
0bc70f1d
TG		 3286 _cleanup_free_ char *network_file = NULL,
3287 *addresses = NULL,
f703cc2c 3288 *routes = NULL,
0bc70f1d
TG		 3289 *dhcp4_address = NULL,
3290 *ipv4ll_address = NULL;
3291 union in_addr_union address;
c598ac76 3292 const char *p;
c4a03a56
TG		 3293 int r;
3294
3295 assert(link);
3296
aa8fbc74 3297 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3298 "NETWORK_FILE", &network_file,
3299 "ADDRESSES", &addresses,
f703cc2c 3300 "ROUTES", &routes,
0bc70f1d 3301 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3302 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3303 if (r < 0 && r != -ENOENT)
3304 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3305
3306 if (network_file) {
3307 Network *network;
3308 char *suffix;
3309
3310 /* drop suffix */
3311 suffix = strrchr(network_file, '.');
3312 if (!suffix) {
3313 log_link_debug(link, "Failed to get network name from %s", network_file);
3314 goto network_file_fail;
3315 }
3316 *suffix = '\0';
3317
3318 r = network_get_by_name(link->manager, basename(network_file), &network);
3319 if (r < 0) {
3320 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3321 goto network_file_fail;
3322 }
3323
7d342c03 3324 r = network_apply(network, link);
c4a03a56
TG		 3325 if (r < 0)
3326 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3327 }
3328
3329network_file_fail:
3330
3331 if (addresses) {
c598ac76 3332 p = addresses;
c4a03a56 3333
c598ac76
TG		 3334 for (;;) {
3335 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3336 char *prefixlen_str;
3337 int family;
3338 unsigned char prefixlen;
c4a03a56 3339
c598ac76
TG		 3340 r = extract_first_word(&p, &address_str, NULL, 0);
3341 if (r < 0) {
3342 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3343 continue;
928bc597
TA		 3344 }
3345 if (r == 0)
c598ac76
TG		 3346 break;
3347
3348 prefixlen_str = strchr(address_str, '/');
c4a03a56 3349 if (!prefixlen_str) {
c598ac76 3350 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3351 continue;
3352 }
3353
313cefa1 3354 *prefixlen_str++ = '\0';
c4a03a56
TG		 3355
3356 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3357 if (r != 1) {
3358 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3359 continue;
3360 }
3361
c598ac76 3362 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3363 if (r < 0) {
c598ac76 3364 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3365 continue;
3366 }
3367
3368 r = address_add(link, family, &address, prefixlen, NULL);
3369 if (r < 0)
3370 return log_link_error_errno(link, r, "Failed to add address: %m");
3371 }
3372 }
3373
f703cc2c 3374 if (routes) {
74544b4e
TA		 3375 p = routes;
3376
c598ac76 3377 for (;;) {
4afd3348 3378 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f1368755
YW		 3379 _cleanup_(route_freep) Route *tmp = NULL;
3380 _cleanup_free_ char *route_str = NULL;
f703cc2c 3381 char *prefixlen_str;
f1368755 3382 Route *route;
f703cc2c 3383
c598ac76
TG		 3384 r = extract_first_word(&p, &route_str, NULL, 0);
3385 if (r < 0) {
3386 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3387 continue;
928bc597
TA		 3388 }
3389 if (r == 0)
c598ac76
TG		 3390 break;
3391
3392 prefixlen_str = strchr(route_str, '/');
f703cc2c 3393 if (!prefixlen_str) {
c598ac76 3394 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3395 continue;
3396 }
3397
313cefa1 3398 *prefixlen_str++ = '\0';
f703cc2c 3399
f1368755
YW		 3400 r = route_new(&tmp);
3401 if (r < 0)
3402 return log_oom();
3403
3404 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%"PRIu32"/"USEC_FMT, &tmp->dst_prefixlen, &tmp->tos, &tmp->priority, &tmp->table, &tmp->lifetime);
f833694d
TG		 3405 if (r != 5) {
3406 log_link_debug(link,
3407 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3408 prefixlen_str);
f703cc2c
TG		 3409 continue;
3410 }
3411
f1368755 3412 r = in_addr_from_string_auto(route_str, &tmp->family, &tmp->dst);
f703cc2c 3413 if (r < 0) {
c598ac76 3414 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3415 continue;
3416 }
3417
f1368755 3418 r = route_add(link, tmp, &route);
f703cc2c
TG		 3419 if (r < 0)
3420 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3421
f1368755
YW		 3422 if (route->lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
3423 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), route->lifetime,
f833694d
TG		 3424 0, route_expire_handler, route);
3425 if (r < 0)
3426 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3427 }
3428
f833694d 3429 sd_event_source_unref(route->expire);
1cc6c93a 3430 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3431 }
3432 }
3433
0bc70f1d
TG		 3434 if (dhcp4_address) {
3435 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3436 if (r < 0) {
b68d26b8 3437 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3438 goto dhcp4_address_fail;
3439 }
3440
b1c626f6 3441 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3442 if (r < 0)
b68d26b8 3443 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3444
3445 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3446 if (r < 0)
b68d26b8 3447 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3448 }
3449
3450dhcp4_address_fail:
3451
3452 if (ipv4ll_address) {
3453 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3454 if (r < 0) {
b68d26b8 3455 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3456 goto ipv4ll_address_fail;
3457 }
3458
3459 r = sd_ipv4ll_new(&link->ipv4ll);
3460 if (r < 0)
b68d26b8 3461 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3462
3463 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3464 if (r < 0)
b68d26b8 3465 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3466 }
3467
3468ipv4ll_address_fail:
3469
c4a03a56
TG		 3470 return 0;
3471}
3472
1c4baffc 3473int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3474 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3475 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3476 Link *link;
5a937ea2 3477 int r;
505f8da7
TG		 3478
3479 assert(m);
fbbeb65a 3480 assert(m->rtnl);
505f8da7
TG		 3481 assert(message);
3482 assert(ret);
3483
3484 r = link_new(m, message, ret);
3485 if (r < 0)
3486 return r;
3487
3488 link = *ret;
3489
6a7a4e4d 3490 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3491
c4a03a56
TG		 3492 r = link_load(link);
3493 if (r < 0)
3494 return r;
3495
bf331d87
YW		 3496 if (path_is_read_only_fs("/sys") <= 0) {
3497 /* udev should be around */
ae06ab10 3498 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3499 r = sd_device_new_from_device_id(&device, ifindex_str);
3500 if (r < 0) {
4d59e14f
YW		 3501 log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m");
3502 return 0;
5c416fc4 3503 }
505f8da7 3504
5a937ea2 3505 r = sd_device_get_is_initialized(device);
51517f9e 3506 if (r < 0) {
bf331d87 3507 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 3508 goto failed;
3509 }
5a937ea2 3510 if (r == 0) {
505f8da7 3511 /* not yet ready */
79008bdd 3512 log_link_debug(link, "link pending udev initialization...");
505f8da7 3513 return 0;
3c4cb064 3514 }
505f8da7 3515
299ad32d
YW		 3516 r = device_is_renaming(device);
3517 if (r < 0) {
bf331d87 3518 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 3519 goto failed;
3520 }
3521 if (r > 0) {
bf331d87 3522 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 3523 return 0;
3524 }
3525
4f561e8e
TG		 3526 r = link_initialized(link, device);
3527 if (r < 0)
5c416fc4 3528 goto failed;
4f561e8e 3529 } else {
e6bf7774 3530 r = link_initialized_and_synced(link);
4f561e8e 3531 if (r < 0)
5c416fc4 3532 goto failed;
4f561e8e 3533 }
505f8da7 3534
a748b692 3535 return 0;
5c416fc4
TG		 3536failed:
3537 link_enter_failed(link);
3538 return r;
a748b692
TG		 3539}
3540
c601ebf7 3541int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3542 int r;
3543
3544 assert(link);
3545
3546 log_link_info(link, "Gained IPv6LL");
3547
c601ebf7 3548 link->ipv6ll_address = *address;
e7ab854c
TG		 3549 link_check_ready(link);
3550
b9ea3d2e 3551 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3552 r = link_acquire_ipv6_conf(link);
3553 if (r < 0) {
3554 link_enter_failed(link);
3555 return r;
3556 }
3557 }
3558
3559 return 0;
3560}
3561
9c0a72f9
TG		 3562static int link_carrier_gained(Link *link) {
3563 int r;
3564
3565 assert(link);
3566
0894cfe4 3567 r = wifi_get_info(link);
8d968fdd
YW		 3568 if (r < 0)
3569 return r;
3570 if (r > 0) {
572b21d9
YW		 3571 r = link_reconfigure_internal(link, NULL, false);
3572 if (r < 0) {
3573 link_enter_failed(link);
8d968fdd 3574 return r;
572b21d9 3575 }
8d968fdd
YW		 3576 }
3577
b9ea3d2e 3578 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3579 r = link_acquire_conf(link);
3580 if (r < 0) {
3581 link_enter_failed(link);
3582 return r;
3583 }
6fc25497 3584
b425c3ae 3585 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 3586 r = link_request_set_addresses(link);
6fc25497
SS		 3587 if (r < 0)
3588 return r;
9c0a72f9
TG		 3589 }
3590
0d4ad91d
AR		 3591 r = link_handle_bound_by_list(link);
3592 if (r < 0)
3593 return r;
3594
9c0a72f9
TG		 3595 return 0;
3596}
3597
3598static int link_carrier_lost(Link *link) {
3599 int r;
3600
3601 assert(link);
3602
25e992ba 3603 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3604 return 0;
3605
fbdb6605 3606 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3607 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3608 * configuration and stop the clients as well. */
97e7fb39
SS		 3609 if (link->setting_mtu)
3610 return 0;
3611
95355a28 3612 r = link_stop_clients(link, false);
9c0a72f9
TG		 3613 if (r < 0) {
3614 link_enter_failed(link);
3615 return r;
3616 }
3617
28464ae0
SS		 3618 if (link_dhcp4_server_enabled(link))
3619 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3620
3104883d
SS		 3621 r = link_drop_config(link);
3622 if (r < 0)
3623 return r;
3624
2c7b826d 3625 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
f258e948 3626 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3627 r = link_drop_foreign_config(link);
3628 if (r < 0)
3629 return r;
3630 }
3104883d 3631
0d4ad91d
AR		 3632 r = link_handle_bound_by_list(link);
3633 if (r < 0)
3634 return r;
3635
9c0a72f9
TG		 3636 return 0;
3637}
3638
3639int link_carrier_reset(Link *link) {
3640 int r;
3641
3642 assert(link);
3643
3644 if (link_has_carrier(link)) {
3645 r = link_carrier_lost(link);
3646 if (r < 0)
3647 return r;
3648
3649 r = link_carrier_gained(link);
3650 if (r < 0)
3651 return r;
3652
6a7a4e4d 3653 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3654 }
3655
3656 return 0;
3657}
3658
d236718c
DS		 3659/* This is called every time an interface admin state changes to up;
3660 * specifically, when IFF_UP flag changes from unset to set */
3661static int link_admin_state_up(Link *link) {
3662 int r;
3663
3664 /* We set the ipv6 mtu after the device mtu, but the kernel resets
3665 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
3666 * ipv6_mtu_set prevents this from trying to set it too early before
3667 * the link->network has been setup; we only need to reset it
3668 * here if we've already set it during normal initialization. */
3669 if (link->ipv6_mtu_set) {
3670 r = link_set_ipv6_mtu(link);
3671 if (r < 0)
3672 return r;
3673 }
3674
3675 return 0;
3676}
3677
1c4baffc 3678int link_update(Link *link, sd_netlink_message *m) {
572b21d9 3679 _cleanup_strv_free_ char **s = NULL;
c49b33ac 3680 struct ether_addr mac;
ca4e095a 3681 const char *ifname;
afe7fd56 3682 uint32_t mtu;
d236718c 3683 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 3684 int old_master, r;
22936833 3685
dd3efc09 3686 assert(link);
b8941f74 3687 assert(link->ifname);
22936833
TG		 3688 assert(m);
3689
7619683b 3690 if (link->state == LINK_STATE_LINGER) {
5238e957 3691 log_link_info(link, "Link re-added");
289e6774 3692 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3693
3694 r = link_new_carrier_maps(link);
3695 if (r < 0)
3696 return r;
7619683b
TG		 3697 }
3698
1c4baffc 3699 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3700 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3701 Manager *manager = link->manager;
b8941f74 3702
30de2b89 3703 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3704
30de2b89
YW		 3705 link_drop(link);
3706 r = link_add(manager, m, &link);
3707 if (r < 0)
3708 return r;
b8941f74
TG		 3709 }
3710
572b21d9
YW		 3711 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3712 if (r >= 0)
3713 strv_free_and_replace(link->alternative_names, s);
3714
1c4baffc 3715 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3716 if (r >= 0 && mtu > 0) {
3717 link->mtu = mtu;
4e964aa0 3718 if (link->original_mtu == 0) {
afe7fd56 3719 link->original_mtu = mtu;
6a7a4e4d 3720 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3721 }
3722
3723 if (link->dhcp_client) {
3c9b8860
TG		 3724 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3725 link->mtu);
fc95c359
YW		 3726 if (r < 0)
3727 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3728 }
7465dd22
PF		 3729
3730 if (link->radv) {
3731 r = sd_radv_set_mtu(link->radv, link->mtu);
3732 if (r < 0)
3733 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3734 }
9842de0d 3735 }
69629de9 3736
e9189a1f
TG		 3737 /* The kernel may broadcast NEWLINK messages without the MAC address
3738 set, simply ignore them. */
1c4baffc 3739 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3740 if (r >= 0) {
3c9b8860
TG		 3741 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3742 ETH_ALEN)) {
c49b33ac 3743
3c9b8860
TG		 3744 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3745 ETH_ALEN);
c49b33ac 3746
79008bdd 3747 log_link_debug(link, "MAC address: "
20861203
TG		 3748 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3749 mac.ether_addr_octet[0],
3750 mac.ether_addr_octet[1],
3751 mac.ether_addr_octet[2],
3752 mac.ether_addr_octet[3],
3753 mac.ether_addr_octet[4],
3754 mac.ether_addr_octet[5]);
c49b33ac 3755
20861203
TG		 3756 if (link->ipv4ll) {
3757 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3758 if (r < 0)
3759 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3760 }
c49b33ac 3761
20861203 3762 if (link->dhcp_client) {
3c9b8860 3763 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3764 (const uint8_t *) &link->mac,
3765 sizeof (link->mac),
3766 ARPHRD_ETHER);
6a7a4e4d
LP		 3767 if (r < 0)
3768 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3769
fff1f40c
YW		 3770 r = dhcp4_set_client_identifier(link);
3771 if (r < 0)
3772 return r;
c49b33ac 3773 }
4138fb2c
PF		 3774
3775 if (link->dhcp6_client) {
f24648a6 3776 const DUID* duid = link_get_duid(link);
8341a5c3 3777
4138fb2c 3778 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3779 (const uint8_t *) &link->mac,
3780 sizeof (link->mac),
3781 ARPHRD_ETHER);
6a7a4e4d
LP		 3782 if (r < 0)
3783 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3784
8217ed5e
TH		 3785 if (link->network->iaid_set) {
3786 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3787 link->network->iaid);
3788 if (r < 0)
3789 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3790 }
413708d1 3791
8341a5c3
ZJS		 3792 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3793 duid->type,
3794 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3795 duid->raw_data_len);
413708d1
VK		 3796 if (r < 0)
3797 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3798 }
7465dd22
PF		 3799
3800 if (link->radv) {
3801 r = sd_radv_set_mac(link->radv, &link->mac);
3802 if (r < 0)
3803 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3804 }
420d2058
SS		 3805
3806 if (link->ndisc) {
3807 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3808 if (r < 0)
3809 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3810 }
c49b33ac 3811 }
4f882b2a
TG		 3812 }
3813
bb262ef0
YW		 3814 old_master = link->master_ifindex;
3815 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
3816
d236718c 3817 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 3818 had_carrier = link_has_carrier(link);
3819
bb262ef0 3820 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 3821 if (r < 0)
3822 return r;
3823
d236718c
DS		 3824 if (!link_was_admin_up && (link->flags & IFF_UP)) {
3825 log_link_info(link, "Link UP");
3826
3827 r = link_admin_state_up(link);
3828 if (r < 0)
3829 return r;
3830 } else if (link_was_admin_up && !(link->flags & IFF_UP))
3831 log_link_info(link, "Link DOWN");
3832
273eec24
LP		 3833 r = link_update_lldp(link);
3834 if (r < 0)
3835 return r;
3836
a61bb41c
TG		 3837 carrier_gained = !had_carrier && link_has_carrier(link);
3838 carrier_lost = had_carrier && !link_has_carrier(link);
3839
3840 if (carrier_gained) {
6a7a4e4d 3841 log_link_info(link, "Gained carrier");
a61bb41c 3842
9c0a72f9
TG		 3843 r = link_carrier_gained(link);
3844 if (r < 0)
3845 return r;
a61bb41c 3846 } else if (carrier_lost) {
6a7a4e4d 3847 log_link_info(link, "Lost carrier");
a61bb41c 3848
9c0a72f9
TG		 3849 r = link_carrier_lost(link);
3850 if (r < 0)
a61bb41c 3851 return r;
a61bb41c
TG		 3852 }
3853
3854 return 0;
dd3efc09 3855}
fe8db0c5 3856
b295beea
LP		 3857static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3858 bool space = false;
3859 Iterator i;
3860 Link *link;
3861
3862 assert(f);
3863 assert(prefix);
3864
3865 if (hashmap_isempty(h))
3866 return;
3867
0d536673 3868 fputs(prefix, f);
b295beea
LP		 3869 HASHMAP_FOREACH(link, h, i) {
3870 if (space)
0d536673 3871 fputc(' ', f);
b295beea
LP		 3872
3873 fprintf(f, "%i", link->ifindex);
3874 space = true;
3875 }
3876
0d536673 3877 fputc('\n', f);
b295beea
LP		 3878}
3879
15761549
YW		 3880static void link_save_dns(FILE *f, struct in_addr_data *dns, unsigned n_dns, bool *space) {
3881 unsigned j;
3882 int r;
3883
3884 for (j = 0; j < n_dns; j++) {
3885 _cleanup_free_ char *b = NULL;
3886
3887 r = in_addr_to_string(dns[j].family, &dns[j].address, &b);
3888 if (r < 0) {
3889 log_debug_errno(r, "Failed to format address, ignoring: %m");
3890 continue;
3891 }
3892
3893 if (*space)
3894 fputc(' ', f);
3895 fputs(b, f);
3896 *space = true;
3897 }
3898}
3899
fe8db0c5 3900int link_save(Link *link) {
68a8723c 3901 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3902 _cleanup_fclose_ FILE *f = NULL;
ac999bf0 3903 const char *admin_state, *oper_state, *carrier_state, *address_state;
e7780c8d 3904 Address *a;
c1eb9872 3905 Route *route;
e7780c8d 3906 Iterator i;
fe8db0c5
TG		 3907 int r;
3908
3909 assert(link);
3910 assert(link->state_file);
68a8723c 3911 assert(link->lease_file);
bbf7c048
TG		 3912 assert(link->manager);
3913
370e9930 3914 if (link->state == LINK_STATE_LINGER) {
6990fb6b 3915 (void) unlink(link->state_file);
370e9930
TG		 3916 return 0;
3917 }
3918
34437b4f
LP		 3919 link_lldp_save(link);
3920
deb2e523
TG		 3921 admin_state = link_state_to_string(link->state);
3922 assert(admin_state);
3923
e375dcde
TG		 3924 oper_state = link_operstate_to_string(link->operstate);
3925 assert(oper_state);
deb2e523 3926
ac999bf0
YW		 3927 carrier_state = link_carrier_state_to_string(link->carrier_state);
3928 assert(carrier_state);
3929
3930 address_state = link_address_state_to_string(link->address_state);
3931 assert(address_state);
3932
fe8db0c5
TG		 3933 r = fopen_temporary(link->state_file, &f, &temp_path);
3934 if (r < 0)
6a7a4e4d 3935 goto fail;
fe8db0c5 3936
5512a963 3937 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3938
3939 fprintf(f,
3940 "# This is private data. Do not parse.\n"
deb2e523 3941 "ADMIN_STATE=%s\n"
ac999bf0
YW		 3942 "OPER_STATE=%s\n"
3943 "CARRIER_STATE=%s\n"
3944 "ADDRESS_STATE=%s\n",
3945 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 3946
bcb7a07e 3947 if (link->network) {
fe0e16db
YW		 3948 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
3949 const char *dhcp_domainname = NULL, *p;
07bdc70d 3950 sd_dhcp6_lease *dhcp6_lease = NULL;
fe0e16db 3951 bool space;
07bdc70d 3952
c1a38904
MTL		 3953 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3954 yes_no(link->network->required_for_online));
3955
4ac77d63
YW		 3956 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s\n",
3957 strempty(link_operstate_to_string(link->network->required_operstate_for_online)));
3958
07bdc70d 3959 if (link->dhcp6_client) {
4058d339
TG		 3960 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3961 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3962 log_link_debug(link, "No DHCPv6 lease");
3963 }
b0e39c82 3964
adc5b2e2
TG		 3965 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3966
0d536673 3967 fputs("DNS=", f);
ea352b40 3968 space = false;
5512a963 3969
15761549
YW		 3970 if (link->n_dns != (unsigned) -1)
3971 link_save_dns(f, link->dns, link->n_dns, &space);
3972 else
3973 link_save_dns(f, link->network->dns, link->network->n_dns, &space);
d5314fff 3974
27cb34f5 3975 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3976 link->dhcp_lease) {
3977 const struct in_addr *addresses;
3978
3979 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
072320ea
TH		 3980 if (r > 0)
3981 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3982 space = true;
07bdc70d
PF		 3983 }
3984
caa8ca42 3985 if (link->network->dhcp6_use_dns && dhcp6_lease) {
07bdc70d
PF		 3986 struct in6_addr *in6_addrs;
3987
3988 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3989 if (r > 0) {
3990 if (space)
0d536673 3991 fputc(' ', f);
07bdc70d 3992 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3993 space = true;
3994 }
3995 }
3996
3997 /* Make sure to flush out old entries before we use the NDISC data */
3998 ndisc_vacuum(link);
3999
b296797f 4000 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 4001 NDiscRDNSS *dd;
4002
4003 SET_FOREACH(dd, link->ndisc_rdnss, i) {
4004 if (space)
0d536673 4005 fputc(' ', f);
1e7a0e21
LP		 4006
4007 serialize_in6_addrs(f, &dd->address, 1);
4008 space = true;
b0e39c82
TG		 4009 }
4010 }
4011
0d536673 4012 fputc('\n', f);
b0e39c82 4013
0d536673 4014 fputs("NTP=", f);
ea352b40 4015 space = false;
15761549 4016 fputstrv(f, link->ntp ?: link->network->ntp, NULL, &space);
d5314fff 4017
27cb34f5 4018 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 4019 link->dhcp_lease) {
4020 const struct in_addr *addresses;
4021
4022 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
299d578f
SS		 4023 if (r > 0)
4024 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
4025 space = true;
4026 }
4027
4028 fputc('\n', f);
4029
4030 fputs("SIP=", f);
4031 space = false;
4032 fputstrv(f, link->network->sip, NULL, &space);
4033
4034 if (link->network->dhcp_use_sip &&
4035 link->dhcp_lease) {
4036 const struct in_addr *addresses;
4037
4038 r = sd_dhcp_lease_get_sip(link->dhcp_lease, &addresses);
072320ea
TH		 4039 if (r > 0)
4040 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
4041 space = true;
07bdc70d
PF		 4042 }
4043
caa8ca42 4044 if (link->network->dhcp6_use_ntp && dhcp6_lease) {
07bdc70d
PF		 4045 struct in6_addr *in6_addrs;
4046 char **hosts;
07bdc70d
PF		 4047
4048 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
4049 &in6_addrs);
4050 if (r > 0) {
4051 if (space)
0d536673 4052 fputc(' ', f);
07bdc70d
PF		 4053 serialize_in6_addrs(f, in6_addrs, r);
4054 space = true;
4055 }
4056
4057 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 4058 if (r > 0)
4059 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 4060 }
4061
0d536673 4062 fputc('\n', f);
bd8f6538 4063
b2a81c0b 4064 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 4065 if (link->dhcp_lease) {
b2a81c0b 4066 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 4067 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
4068 }
b2a81c0b
LP		 4069 if (dhcp6_lease)
4070 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 4071 }
4072
fe0e16db
YW		 4073 fputs("DOMAINS=", f);
4074 space = false;
15761549 4075 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains, i)
fe0e16db 4076 fputs_with_space(f, p, NULL, &space);
07bdc70d 4077
1e7a0e21 4078 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP		 4079 if (dhcp_domainname)
4080 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4081 if (dhcp_domains)
4082 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4083 if (dhcp6_domains)
4084 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 4085 }
4086
4087 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
4088 NDiscDNSSL *dd;
1e7a0e21
LP		 4089
4090 SET_FOREACH(dd, link->ndisc_dnssl, i)
4091 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4092 }
b2a81c0b 4093
0d536673 4094 fputc('\n', f);
6192b846 4095
fe0e16db
YW		 4096 fputs("ROUTE_DOMAINS=", f);
4097 space = false;
15761549 4098 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains, i)
fe0e16db 4099 fputs_with_space(f, p, NULL, &space);
b2a81c0b 4100
1e7a0e21 4101 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
1e7a0e21
LP		 4102 if (dhcp_domainname)
4103 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4104 if (dhcp_domains)
4105 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4106 if (dhcp6_domains)
4107 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 4108 }
4109
4110 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
4111 NDiscDNSSL *dd;
1e7a0e21
LP		 4112
4113 SET_FOREACH(dd, link->ndisc_dnssl, i)
4114 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4115 }
b2a81c0b 4116
0d536673 4117 fputc('\n', f);
67272d15 4118
3c9b8860 4119 fprintf(f, "LLMNR=%s\n",
15761549 4120 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
aaa297d4 4121 fprintf(f, "MDNS=%s\n",
15761549
YW		 4122 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
4123 if (link->dns_default_route >= 0)
4124 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->dns_default_route));
4125 else if (link->network->dns_default_route >= 0)
7ece6f58 4126 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
e7780c8d 4127
15761549
YW		 4128 if (link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
4129 fprintf(f, "DNS_OVER_TLS=%s\n",
4130 dns_over_tls_mode_to_string(link->dns_over_tls_mode));
4131 else if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
c9299be2
IT		 4132 fprintf(f, "DNS_OVER_TLS=%s\n",
4133 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 4134
15761549
YW		 4135 if (link->dnssec_mode != _DNSSEC_MODE_INVALID)
4136 fprintf(f, "DNSSEC=%s\n",
4137 dnssec_mode_to_string(link->dnssec_mode));
4138 else if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
ad6c0475
LP		 4139 fprintf(f, "DNSSEC=%s\n",
4140 dnssec_mode_to_string(link->network->dnssec_mode));
4141
15761549
YW		 4142 if (!set_isempty(link->dnssec_negative_trust_anchors)) {
4143 const char *n;
4144
4145 fputs("DNSSEC_NTA=", f);
4146 space = false;
4147 SET_FOREACH(n, link->dnssec_negative_trust_anchors, i)
4148 fputs_with_space(f, n, NULL, &space);
4149 fputc('\n', f);
4150 } else if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
8a516214
LP		 4151 const char *n;
4152
0d536673 4153 fputs("DNSSEC_NTA=", f);
8a516214 4154 space = false;
d390f8ef
LP		 4155 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
4156 fputs_with_space(f, n, NULL, &space);
0d536673 4157 fputc('\n', f);
8a516214
LP		 4158 }
4159
0d536673 4160 fputs("ADDRESSES=", f);
e7780c8d
TG		 4161 space = false;
4162 SET_FOREACH(a, link->addresses, i) {
4163 _cleanup_free_ char *address_str = NULL;
4164
4165 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
4166 if (r < 0)
4167 goto fail;
4168
e7780c8d
TG		 4169 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
4170 space = true;
4171 }
0d536673 4172 fputc('\n', f);
c1eb9872 4173
0d536673 4174 fputs("ROUTES=", f);
c1eb9872
TG		 4175 space = false;
4176 SET_FOREACH(route, link->routes, i) {
4177 _cleanup_free_ char *route_str = NULL;
4178
4179 r = in_addr_to_string(route->family, &route->dst, &route_str);
4180 if (r < 0)
4181 goto fail;
4182
ecc3f340
ZJS		 4183 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
4184 space ? " " : "", route_str,
f833694d 4185 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 4186 space = true;
4187 }
4188
0d536673 4189 fputc('\n', f);
bcb7a07e 4190 }
7374f9d8 4191
b295beea
LP		 4192 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
4193 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 4194
8eb9058d 4195 if (link->dhcp_lease) {
0bc70f1d 4196 struct in_addr address;
8eb9058d
LP		 4197 const char *tz = NULL;
4198
0bc70f1d
TG		 4199 assert(link->network);
4200
8eb9058d
LP		 4201 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
4202 if (r >= 0)
4203 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 4204
0bc70f1d
TG		 4205 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
4206 if (r >= 0) {
0d536673 4207 fputs("DHCP4_ADDRESS=", f);
072320ea 4208 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 4209 fputc('\n', f);
0bc70f1d 4210 }
d9876a52 4211
bd91b83e 4212 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 4213 if (r < 0)
c2d6bd61 4214 goto fail;
fe8db0c5 4215
7374f9d8 4216 fprintf(f,
b0e39c82
TG		 4217 "DHCP_LEASE=%s\n",
4218 link->lease_file);
deb2e523 4219 } else
6990fb6b 4220 (void) unlink(link->lease_file);
fe8db0c5 4221
0bc70f1d
TG		 4222 if (link->ipv4ll) {
4223 struct in_addr address;
4224
4225 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
4226 if (r >= 0) {
0d536673 4227 fputs("IPV4LL_ADDRESS=", f);
072320ea 4228 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 4229 fputc('\n', f);
0bc70f1d
TG		 4230 }
4231 }
4232
c2d6bd61
LP		 4233 r = fflush_and_check(f);
4234 if (r < 0)
4235 goto fail;
fe8db0c5 4236
c2d6bd61 4237 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 4238 r = -errno;
c2d6bd61 4239 goto fail;
fe8db0c5
TG		 4240 }
4241
c2d6bd61 4242 return 0;
dacd6cee 4243
c2d6bd61 4244fail:
6a7a4e4d 4245 (void) unlink(link->state_file);
6a7a4e4d
LP		 4246 if (temp_path)
4247 (void) unlink(temp_path);
4248
dacd6cee 4249 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 4250}
4251
84de38c5
TG		 4252/* The serialized state in /run is no longer up-to-date. */
4253void link_dirty(Link *link) {
4254 int r;
4255
4256 assert(link);
4257
0c241a37
SS		 4258 /* mark manager dirty as link is dirty */
4259 manager_dirty(link->manager);
4260
84de38c5
TG		 4261 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
4262 if (r < 0)
4263 /* allocation errors are ignored */
4264 return;
4265
4266 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 4267 if (r <= 0)
4268 /* don't take another ref if the link was already dirty */
84de38c5
TG		 4269 return;
4270
4271 link_ref(link);
4272}
4273
4274/* The serialized state in /run is up-to-date */
4275void link_clean(Link *link) {
4276 assert(link);
4277 assert(link->manager);
4278
1046bf9b 4279 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4280}
4281
fe8db0c5 4282static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4283 [LINK_STATE_PENDING] = "pending",
bd08ce56 4284 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 4285 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 4286 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4287 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4288 [LINK_STATE_FAILED] = "failed",
370e9930 4289 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4290};
4291
4292DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
5ecb131d
YW		 4293
4294int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg) {
4295 const char *err_msg = NULL;
4296
4297 (void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg);
4298 return log_link_full(link, level, err, "%s: %s%s%m", msg, strempty(err_msg), err_msg ? " " : "");
4299}
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