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network: introduce link_set_addresses()
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
53e1b683 1/* SPDX-License-Identifier: LGPL-2.1+ */
f579559b 2
9aa5d8ba 3#include <netinet/in.h>
f579559b 4#include <linux/if.h>
8f815e8b 5#include <linux/if_arp.h>
518cd6b5 6#include <linux/if_link.h>
4cc7a82c 7#include <unistd.h>
f579559b 8
b5efdb8a 9#include "alloc-util.h"
737f1405
YW		 10#include "bond.h"
11#include "bridge.h"
1346b1f0 12#include "bus-util.h"
27dfc982 13#include "dhcp-identifier.h"
bd91b83e 14#include "dhcp-lease-internal.h"
686d13b9 15#include "env-file.h"
4bb7cc82 16#include "ethtool-util.h"
3ffd4af2 17#include "fd-util.h"
cf1d700d 18#include "fileio.h"
737f1405 19#include "ipvlan.h"
ef118d00 20#include "missing_network.h"
cf1d700d 21#include "netlink-util.h"
c6f7c917 22#include "network-internal.h"
fb486c90 23#include "networkd-address-label.h"
3ddcbeea 24#include "networkd-can.h"
8fcf1d61 25#include "networkd-dhcp-server.h"
ca5ad760
YW		 26#include "networkd-dhcp4.h"
27#include "networkd-dhcp6.h"
ee446d57 28#include "networkd-fdb.h"
ca5ad760 29#include "networkd-ipv4ll.h"
a0e5c15d 30#include "networkd-ipv6-proxy-ndp.h"
6a1af3d4
YW		 31#include "networkd-link-bus.h"
32#include "networkd-link.h"
8e1ad1ea 33#include "networkd-lldp-tx.h"
23f53b99 34#include "networkd-manager.h"
dbf63196 35#include "networkd-mdb.h"
1e7a0e21 36#include "networkd-ndisc.h"
e4a71bf3 37#include "networkd-neighbor.h"
75156ccb 38#include "networkd-nexthop.h"
518cd6b5 39#include "networkd-sriov.h"
7465dd22 40#include "networkd-radv.h"
bce67bbe 41#include "networkd-routing-policy-rule.h"
8d968fdd 42#include "networkd-wifi.h"
cf1d700d
TG		 43#include "set.h"
44#include "socket-util.h"
bf331d87 45#include "stat-util.h"
15a5e950 46#include "stdio-util.h"
8b43440b 47#include "string-table.h"
51517f9e 48#include "strv.h"
62e021a9 49#include "sysctl-util.h"
34658df2 50#include "tc.h"
e4de7287 51#include "tmpfile-util.h"
299ad32d 52#include "udev-util.h"
cf1d700d 53#include "util.h"
737f1405 54#include "vrf.h"
fc2f9534 55
bdb9f580
YW		 56uint32_t link_get_vrf_table(Link *link) {
57 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
58}
59
60uint32_t link_get_dhcp_route_table(Link *link) {
61 /* When the interface is part of an VRF use the VRFs routing table, unless
62 * another table is explicitly specified. */
63 if (link->network->dhcp_route_table_set)
64 return link->network->dhcp_route_table;
65 return link_get_vrf_table(link);
66}
67
68uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
69 if (link->network->ipv6_accept_ra_route_table_set)
70 return link->network->ipv6_accept_ra_route_table;
71 return link_get_vrf_table(link);
72}
73
f24648a6
YW		 74DUID* link_get_duid(Link *link) {
75 if (link->network->duid.type != _DUID_TYPE_INVALID)
76 return &link->network->duid;
77 else
78 return &link->manager->duid;
79}
80
b9d74c40
LP		 81static bool link_dhcp6_enabled(Link *link) {
82 assert(link);
83
fa709992
LP		 84 if (!socket_ipv6_is_supported())
85 return false;
86
78c958f8
TG		 87 if (link->flags & IFF_LOOPBACK)
88 return false;
89
90 if (!link->network)
91 return false;
92
f2bfcdb9
YW		 93 if (link->network->bond)
94 return false;
95
500b96eb 96 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 97 return false;
98
e0ee46f2 99 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 100}
101
b9d74c40
LP		 102static bool link_dhcp4_enabled(Link *link) {
103 assert(link);
104
78c958f8
TG		 105 if (link->flags & IFF_LOOPBACK)
106 return false;
107
108 if (!link->network)
109 return false;
110
f2bfcdb9
YW		 111 if (link->network->bond)
112 return false;
113
500b96eb 114 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 115 return false;
116
e0ee46f2 117 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 118}
119
b9d74c40
LP		 120static bool link_dhcp4_server_enabled(Link *link) {
121 assert(link);
122
78c958f8
TG		 123 if (link->flags & IFF_LOOPBACK)
124 return false;
125
126 if (!link->network)
127 return false;
128
f2bfcdb9
YW		 129 if (link->network->bond)
130 return false;
131
500b96eb 132 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 133 return false;
134
78c958f8
TG		 135 return link->network->dhcp_server;
136}
137
2d792895 138bool link_ipv4ll_enabled(Link *link, AddressFamily mask) {
b9d74c40 139 assert(link);
910feb78 140 assert((mask & ~(ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) == 0);
b9d74c40 141
78c958f8
TG		 142 if (link->flags & IFF_LOOPBACK)
143 return false;
144
145 if (!link->network)
146 return false;
147
500b96eb 148 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 149 return false;
150
98d20a17 151 if (STRPTR_IN_SET(link->kind,
152 "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
b0486c73 153 "vti6", "nlmon", "xfrm", "bareudp"))
a8f5bba6
JD		 154 return false;
155
f410d463
YW		 156 /* L3 or L3S mode do not support ARP. */
157 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
158 return false;
159
f2bfcdb9
YW		 160 if (link->network->bond)
161 return false;
162
910feb78 163 return link->network->link_local & mask;
8bc17bb3
SS		 164}
165
b9d74c40
LP		 166static bool link_ipv6ll_enabled(Link *link) {
167 assert(link);
168
fa709992
LP		 169 if (!socket_ipv6_is_supported())
170 return false;
171
d0d6a4cd
TG		 172 if (link->flags & IFF_LOOPBACK)
173 return false;
174
175 if (!link->network)
176 return false;
177
500b96eb 178 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 179 return false;
180
181 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon"))
a8f5bba6
JD		 182 return false;
183
f2bfcdb9
YW		 184 if (link->network->bond)
185 return false;
186
e0ee46f2 187 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 188}
189
439689c6
SS		 190static bool link_ipv6_enabled(Link *link) {
191 assert(link);
192
193 if (!socket_ipv6_is_supported())
194 return false;
195
b102cdca 196 if (link->network->bond)
2b00a4e0
TY		 197 return false;
198
500b96eb 199 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 200 return false;
201
4cef7fe3 202 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
adfeee49
YW		 203 if (link_ipv6ll_enabled(link))
204 return true;
205
206 if (network_has_static_ipv6_configurations(link->network))
207 return true;
208
209 return false;
439689c6
SS		 210}
211
7465dd22
PF		 212static bool link_radv_enabled(Link *link) {
213 assert(link);
214
215 if (!link_ipv6ll_enabled(link))
216 return false;
217
55a7c78b 218 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 219}
220
769d324c 221static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 222 assert(link);
223
5a8bcb67
LP		 224 if (link->flags & IFF_LOOPBACK)
225 return false;
226
227 if (!link->network)
228 return false;
229
2d792895 230 if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
765afd5c
LP		 231 return false;
232
e0ee46f2 233 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 234}
235
236static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 237 assert(link);
765afd5c
LP		 238
239 if (!socket_ipv6_is_supported())
240 return false;
241
769d324c
LP		 242 if (link->flags & IFF_LOOPBACK)
243 return false;
244
245 if (!link->network)
246 return false;
247
2d792895 248 if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
765afd5c
LP		 249 return false;
250
e0ee46f2 251 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 252}
253
23d8b221
SS		 254static bool link_proxy_arp_enabled(Link *link) {
255 assert(link);
256
257 if (link->flags & IFF_LOOPBACK)
258 return false;
259
260 if (!link->network)
261 return false;
262
263 if (link->network->proxy_arp < 0)
264 return false;
265
266 return true;
267}
268
b9d74c40
LP		 269static bool link_ipv6_accept_ra_enabled(Link *link) {
270 assert(link);
271
fa709992
LP		 272 if (!socket_ipv6_is_supported())
273 return false;
274
f5a8c43f
TG		 275 if (link->flags & IFF_LOOPBACK)
276 return false;
277
278 if (!link->network)
279 return false;
280
702c979f
SS		 281 if (!link_ipv6ll_enabled(link))
282 return false;
283
f5a8c43f
TG		 284 /* If unset use system default (enabled if local forwarding is disabled.
285 * disabled if local forwarding is enabled).
286 * If set, ignore or enforce RA independent of local forwarding state.
287 */
288 if (link->network->ipv6_accept_ra < 0)
289 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
290 return !link_ipv6_forward_enabled(link);
291 else if (link->network->ipv6_accept_ra > 0)
292 /* accept RA even if ip_forward is enabled */
293 return true;
294 else
295 /* ignore RA */
296 return false;
297}
298
1f0d9695 299static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 300 assert(link);
d68e2e59
LP		 301
302 if (!socket_ipv6_is_supported())
303 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
304
49092e22 305 if (link->flags & IFF_LOOPBACK)
1f0d9695 306 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 307
308 if (!link->network)
1f0d9695 309 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 310
311 return link->network->ipv6_privacy_extensions;
312}
313
57ad7607 314static int link_update_ipv6_sysctl(Link *link) {
482efedc 315 bool enabled;
439689c6
SS		 316 int r;
317
318 if (link->flags & IFF_LOOPBACK)
319 return 0;
320
482efedc
SS		 321 enabled = link_ipv6_enabled(link);
322 if (enabled) {
323 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", false);
324 if (r < 0)
57ad7607
ZJS		 325 return log_link_warning_errno(link, r, "Cannot enable IPv6: %m");
326
327 log_link_info(link, "IPv6 successfully enabled");
482efedc 328 }
439689c6
SS		 329
330 return 0;
331}
332
34bf3c00
YW		 333static bool link_is_enslaved(Link *link) {
334 if (link->flags & IFF_SLAVE)
335 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
336 return true;
337
34bf3c00
YW		 338 if (!link->network)
339 return false;
340
bb262ef0 341 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 342 return true;
343
bb262ef0
YW		 344 /* TODO: add conditions for other netdevs. */
345
34bf3c00
YW		 346 return false;
347}
348
45e11abf
YW		 349static void link_update_master_operstate(Link *link, NetDev *netdev) {
350 Link *master;
351
352 if (!netdev)
353 return;
354
7936917e
YW		 355 if (netdev->ifindex <= 0)
356 return;
357
45e11abf
YW		 358 if (link_get(link->manager, netdev->ifindex, &master) < 0)
359 return;
360
361 link_update_operstate(master, true);
362}
363
364void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 365 LinkOperationalState operstate;
1678fbb3
YW		 366 LinkCarrierState carrier_state;
367 LinkAddressState address_state;
35c5a9ca 368 _cleanup_strv_free_ char **p = NULL;
1678fbb3 369 uint8_t scope = RT_SCOPE_NOWHERE;
35c5a9ca 370 bool changed = false;
1678fbb3 371 Address *address;
14153d1b 372
84de38c5
TG		 373 assert(link);
374
375 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 376 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 377 else if (link_has_carrier(link)) {
1678fbb3
YW		 378 if (link_is_enslaved(link))
379 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 380 else
1678fbb3 381 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 382 } else if (link->flags & IFF_UP)
1678fbb3 383 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 384 else
1678fbb3 385 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 386
1678fbb3 387 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 388 Link *slave;
389
90e74a66 390 SET_FOREACH(slave, link->slaves) {
959f65d3 391 link_update_operstate(slave, false);
84de38c5 392
1678fbb3
YW		 393 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
394 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 395 }
959f65d3 396 }
84de38c5 397
90e74a66 398 SET_FOREACH(address, link->addresses) {
1678fbb3
YW		 399 if (!address_is_ready(address))
400 continue;
84de38c5 401
1678fbb3
YW		 402 if (address->scope < scope)
403 scope = address->scope;
404 }
84de38c5 405
1678fbb3 406 /* for operstate we also take foreign addresses into account */
90e74a66 407 SET_FOREACH(address, link->addresses_foreign) {
1678fbb3
YW		 408 if (!address_is_ready(address))
409 continue;
410
411 if (address->scope < scope)
412 scope = address->scope;
413 }
414
415 if (scope < RT_SCOPE_SITE)
416 /* universally accessible addresses found */
417 address_state = LINK_ADDRESS_STATE_ROUTABLE;
418 else if (scope < RT_SCOPE_HOST)
419 /* only link or site local addresses found */
420 address_state = LINK_ADDRESS_STATE_DEGRADED;
84de38c5 421 else
1678fbb3
YW		 422 /* no useful addresses found */
423 address_state = LINK_ADDRESS_STATE_OFF;
424
425 /* Mapping of address and carrier state vs operational state
426 * carrier state
427 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
428 * ------------------------------------------------------------------------------
429 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
430 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
431 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
432 */
84de38c5 433
1678fbb3
YW		 434 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
435 operstate = (LinkOperationalState) carrier_state;
436 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
437 operstate = LINK_OPERSTATE_ROUTABLE;
438 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
439 operstate = LINK_OPERSTATE_DEGRADED;
440 else
14153d1b
YW		 441 operstate = LINK_OPERSTATE_ENSLAVED;
442
35c5a9ca
YW		 443 if (link->carrier_state != carrier_state) {
444 link->carrier_state = carrier_state;
445 changed = true;
446 if (strv_extend(&p, "CarrierState") < 0)
447 log_oom();
448 }
959f65d3 449
35c5a9ca
YW		 450 if (link->address_state != address_state) {
451 link->address_state = address_state;
452 changed = true;
453 if (strv_extend(&p, "AddressState") < 0)
454 log_oom();
959f65d3
YW		 455 }
456
84de38c5
TG		 457 if (link->operstate != operstate) {
458 link->operstate = operstate;
35c5a9ca
YW		 459 changed = true;
460 if (strv_extend(&p, "OperationalState") < 0)
461 log_oom();
84de38c5 462 }
959f65d3 463
35c5a9ca
YW		 464 if (p)
465 link_send_changed_strv(link, p);
466 if (changed)
467 link_dirty(link);
468
45e11abf
YW		 469 if (also_update_master && link->network) {
470 link_update_master_operstate(link, link->network->bond);
471 link_update_master_operstate(link, link->network->bridge);
959f65d3 472 }
84de38c5
TG		 473}
474
51d18171
TG		 475#define FLAG_STRING(string, flag, old, new) \
476 (((old ^ new) & flag) \
477 ? ((old & flag) ? (" -" string) : (" +" string)) \
478 : "")
479
bb262ef0 480static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 481 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
482 uint8_t operstate;
483 int r;
484
485 assert(link);
486
487 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 488 if (r < 0)
489 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 490
1c4baffc 491 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 492 if (r < 0)
493 /* if we got a message without operstate, take it to mean
494 the state was unchanged */
495 operstate = link->kernel_operstate;
496
bb262ef0 497 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 498 return 0;
499
500 if (link->flags != flags) {
6a7a4e4d 501 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		 502 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
503 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
504 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
505 FLAG_STRING("UP", IFF_UP, link->flags, flags),
506 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
507 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
508 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
509 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
510 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
511 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
512 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
513 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
514 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
515 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
516 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
517 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
518 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
519 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
520 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
521
522 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
523 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
524 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
525 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
526 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
527 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
528 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
529 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
530
531 /* link flags are currently at most 18 bits, let's align to
532 * printing 20 */
533 if (unknown_flags_added)
79008bdd 534 log_link_debug(link,
6a7a4e4d 535 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 536 unknown_flags_added);
537
538 if (unknown_flags_removed)
79008bdd 539 log_link_debug(link,
6a7a4e4d 540 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 541 unknown_flags_removed);
542 }
543
544 link->flags = flags;
545 link->kernel_operstate = operstate;
546
959f65d3 547 link_update_operstate(link, true);
51d18171
TG		 548
549 return 0;
550}
551
1c4baffc 552static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 553 _cleanup_(link_unrefp) Link *link = NULL;
6cad256d 554 const char *ifname, *kind = NULL;
b710e6b6 555 unsigned short iftype;
572b21d9
YW		 556 int r, ifindex;
557 uint16_t type;
f579559b 558
0c2f9b84 559 assert(manager);
505f8da7 560 assert(message);
f579559b
TG		 561 assert(ret);
562
6cad256d
TJ		 563 /* check for link kind */
564 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
565 if (r == 0) {
db2f8a2e 566 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 567 r = sd_netlink_message_exit_container(message);
568 if (r < 0)
569 return r;
570 }
571
1c4baffc 572 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 573 if (r < 0)
574 return r;
575 else if (type != RTM_NEWLINK)
576 return -EINVAL;
577
578 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
579 if (r < 0)
580 return r;
581 else if (ifindex <= 0)
582 return -EINVAL;
583
b710e6b6
LP		 584 r = sd_rtnl_message_link_get_type(message, &iftype);
585 if (r < 0)
586 return r;
587
1c4baffc 588 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 589 if (r < 0)
590 return r;
591
17f9c355 592 link = new(Link, 1);
f579559b
TG		 593 if (!link)
594 return -ENOMEM;
595
17f9c355
YW		 596 *link = (Link) {
597 .n_ref = 1,
598 .manager = manager,
599 .state = LINK_STATE_PENDING,
17f9c355
YW		 600 .ifindex = ifindex,
601 .iftype = iftype,
15761549
YW		 602
603 .n_dns = (unsigned) -1,
604 .dns_default_route = -1,
605 .llmnr = _RESOLVE_SUPPORT_INVALID,
606 .mdns = _RESOLVE_SUPPORT_INVALID,
607 .dnssec_mode = _DNSSEC_MODE_INVALID,
608 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
17f9c355
YW		 609 };
610
505f8da7
TG		 611 link->ifname = strdup(ifname);
612 if (!link->ifname)
613 return -ENOMEM;
f579559b 614
6cad256d
TJ		 615 if (kind) {
616 link->kind = strdup(kind);
617 if (!link->kind)
618 return -ENOMEM;
619 }
620
cbff7170
TJ		 621 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
622 if (r < 0)
623 log_link_debug_errno(link, r, "New device has no master, continuing without");
624
1c4baffc 625 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 626 if (r < 0)
34437b4f 627 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 628
c643bda5 629 r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac);
4bb7cc82
YW		 630 if (r < 0)
631 log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
632
c643bda5
YW		 633 r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver);
634 if (r < 0)
635 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
636
572b21d9
YW		 637 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &link->alternative_names);
638 if (r < 0 && r != -ENODATA)
639 return r;
640
34437b4f 641 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 642 return -ENOMEM;
fe8db0c5 643
34437b4f 644 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 645 return -ENOMEM;
646
34437b4f 647 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 648 return -ENOMEM;
649
d5099efc 650 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 651 if (r < 0)
652 return r;
653
654 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 655 if (r < 0)
656 return r;
657
bb262ef0 658 r = link_update_flags(link, message, false);
51d18171
TG		 659 if (r < 0)
660 return r;
661
1cc6c93a 662 *ret = TAKE_PTR(link);
f579559b
TG		 663
664 return 0;
665}
666
15761549
YW		 667void link_ntp_settings_clear(Link *link) {
668 link->ntp = strv_free(link->ntp);
669}
670
671void link_dns_settings_clear(Link *link) {
e77bd3fd
YW		 672 if (link->n_dns != (unsigned) -1)
673 for (unsigned i = 0; i < link->n_dns; i++)
674 in_addr_full_free(link->dns[i]);
15761549
YW		 675 link->dns = mfree(link->dns);
676 link->n_dns = (unsigned) -1;
677
678 link->search_domains = ordered_set_free_free(link->search_domains);
679 link->route_domains = ordered_set_free_free(link->route_domains);
680
681 link->dns_default_route = -1;
682 link->llmnr = _RESOLVE_SUPPORT_INVALID;
683 link->mdns = _RESOLVE_SUPPORT_INVALID;
684 link->dnssec_mode = _DNSSEC_MODE_INVALID;
685 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
686
687 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
688}
689
1a6bb31f
YW		 690static void link_free_engines(Link *link) {
691 if (!link)
692 return;
693
694 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
695 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
696 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
1a6bb31f
YW		 697
698 link->lldp = sd_lldp_unref(link->lldp);
699
700 ndisc_flush(link);
701
702 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
703 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 704 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
1a6bb31f
YW		 705 link->ndisc = sd_ndisc_unref(link->ndisc);
706 link->radv = sd_radv_unref(link->radv);
707}
708
8301aa0b 709static Link *link_free(Link *link) {
428fd0a7
TG		 710 Address *address;
711
8301aa0b 712 assert(link);
f579559b 713
15761549
YW		 714 link_ntp_settings_clear(link);
715 link_dns_settings_clear(link);
716
8eec0b9d
YW		 717 link->routes = set_free(link->routes);
718 link->routes_foreign = set_free(link->routes_foreign);
6e537f62
YW		 719 link->dhcp_routes = set_free(link->dhcp_routes);
720 link->dhcp_routes_old = set_free(link->dhcp_routes_old);
1633c457
YW		 721 link->dhcp6_routes = set_free(link->dhcp6_routes);
722 link->dhcp6_routes_old = set_free(link->dhcp6_routes_old);
723 link->dhcp6_pd_routes = set_free(link->dhcp6_pd_routes);
724 link->dhcp6_pd_routes_old = set_free(link->dhcp6_pd_routes_old);
69203fba 725 link->ndisc_routes = set_free(link->ndisc_routes);
adda1ed9 726
8eec0b9d
YW		 727 link->nexthops = set_free(link->nexthops);
728 link->nexthops_foreign = set_free(link->nexthops_foreign);
c16c7808 729
8eec0b9d
YW		 730 link->neighbors = set_free(link->neighbors);
731 link->neighbors_foreign = set_free(link->neighbors_foreign);
d1bdafd2 732
8eec0b9d
YW		 733 link->addresses = set_free(link->addresses);
734 link->addresses_foreign = set_free(link->addresses_foreign);
e5526518 735 link->static_addresses = set_free(link->static_addresses);
1633c457
YW		 736 link->dhcp6_addresses = set_free(link->dhcp6_addresses);
737 link->dhcp6_addresses_old = set_free(link->dhcp6_addresses_old);
738 link->dhcp6_pd_addresses = set_free(link->dhcp6_pd_addresses);
739 link->dhcp6_pd_addresses_old = set_free(link->dhcp6_pd_addresses_old);
69203fba 740 link->ndisc_addresses = set_free(link->ndisc_addresses);
adda1ed9 741
11bf3cce
LP		 742 while ((address = link->pool_addresses)) {
743 LIST_REMOVE(addresses, link->pool_addresses, address);
744 address_free(address);
745 }
746
7272b25e 747 link_lldp_emit_stop(link);
1a6bb31f 748 link_free_engines(link);
68a8723c 749 free(link->lease_file);
49699bac
SS		 750 free(link->lldp_file);
751
c166a070 752 free(link->ifname);
572b21d9 753 strv_free(link->alternative_names);
ceac4078 754 free(link->kind);
8d968fdd 755 free(link->ssid);
c643bda5 756 free(link->driver);
6cad256d 757
db2f8a2e 758 (void) unlink(link->state_file);
fe8db0c5 759 free(link->state_file);
c166a070 760
51517f9e 761 sd_device_unref(link->sd_device);
b5db00e5 762
0d4ad91d 763 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 764 hashmap_free(link->bound_by_links);
765
5f707e12 766 set_free_with_destructor(link->slaves, link_unref);
033295c1 767
c9c908a6
YW		 768 network_unref(link->network);
769
8301aa0b 770 return mfree(link);
14b746f7
TG		 771}
772
8301aa0b 773DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 774
11a7f229
TG		 775int link_get(Manager *m, int ifindex, Link **ret) {
776 Link *link;
11a7f229
TG		 777
778 assert(m);
e856ed00 779 assert(ifindex > 0);
11a7f229
TG		 780 assert(ret);
781
ae06ab10 782 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 783 if (!link)
784 return -ENODEV;
785
786 *ret = link;
787
788 return 0;
789}
790
af9ba57a 791void link_set_state(Link *link, LinkState state) {
e331e246
TG		 792 assert(link);
793
794 if (link->state == state)
795 return;
796
0beb9542
YW		 797 log_link_debug(link, "State changed: %s -> %s",
798 link_state_to_string(link->state),
799 link_state_to_string(state));
800
e331e246
TG		 801 link->state = state;
802
803 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 804}
805
57bd6899
TG		 806static void link_enter_unmanaged(Link *link) {
807 assert(link);
808
e331e246 809 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 810
84de38c5 811 link_dirty(link);
57bd6899
TG		 812}
813
95355a28 814int link_stop_clients(Link *link, bool may_keep_dhcp) {
111bb8f9 815 int r = 0, k;
051e77ca 816 Address *ad;
111bb8f9
TG		 817
818 assert(link);
819 assert(link->manager);
820 assert(link->manager->event);
821
80060352
ZJS		 822 bool keep_dhcp = may_keep_dhcp &&
823 link->network &&
824 (link->manager->restarting ||
825 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
826
827 if (link->dhcp_client && !keep_dhcp) {
111bb8f9 828 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 829 if (k < 0)
36c7d709 830 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 831 }
832
ba179154 833 if (link->ipv4ll) {
111bb8f9 834 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 835 if (k < 0)
36c7d709 836 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 837 }
838
051e77ca
SS		 839 if (link->network)
840 LIST_FOREACH(addresses, ad, link->network->static_addresses)
841 if (ad->acd && sd_ipv4acd_is_running(ad->acd) == 0) {
842 k = sd_ipv4acd_stop(ad->acd);
843 if (k < 0)
844 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
845 }
846
f5a8c43f
TG		 847 if (link->dhcp6_client) {
848 k = sd_dhcp6_client_stop(link->dhcp6_client);
849 if (k < 0)
36c7d709 850 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 851 }
4138fb2c 852
1633c457
YW		 853 if (link_dhcp6_pd_is_enabled(link)) {
854 k = dhcp6_pd_remove(link);
855 if (k < 0)
856 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
857 }
858
1e7a0e21
LP		 859 if (link->ndisc) {
860 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 861 if (k < 0)
36c7d709 862 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 863 }
864
7465dd22 865 if (link->radv) {
290696e5 866 k = sd_radv_stop(link->radv);
7465dd22
PF		 867 if (k < 0)
868 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
869 }
870
7272b25e 871 link_lldp_emit_stop(link);
111bb8f9
TG		 872 return r;
873}
874
b22d8a00 875void link_enter_failed(Link *link) {
ef1ba606 876 assert(link);
f882c247 877
370e9930 878 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 879 return;
880
6a7a4e4d 881 log_link_warning(link, "Failed");
449f7554 882
e331e246 883 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 884
95355a28 885 link_stop_clients(link, false);
111bb8f9 886
84de38c5 887 link_dirty(link);
f882c247
TG		 888}
889
7033af49
YW		 890static int link_join_netdevs_after_configured(Link *link) {
891 NetDev *netdev;
7033af49
YW		 892 int r;
893
90e74a66 894 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7033af49
YW		 895 if (netdev->ifindex > 0)
896 /* Assume already enslaved. */
897 continue;
898
899 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
900 continue;
901
902 log_struct(LOG_DEBUG,
903 LOG_LINK_INTERFACE(link),
904 LOG_NETDEV_INTERFACE(netdev),
905 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
906
907 r = netdev_join(netdev, link, NULL);
908 if (r < 0)
909 return log_struct_errno(LOG_WARNING, r,
910 LOG_LINK_INTERFACE(link),
911 LOG_NETDEV_INTERFACE(netdev),
912 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
913 }
914
915 return 0;
916}
917
e3a7b048 918static void link_enter_configured(Link *link) {
dd43110f
TG		 919 assert(link);
920 assert(link->network);
e3a7b048 921
289e6774 922 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 923 return;
dd43110f 924
e331e246 925 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 926
7033af49
YW		 927 (void) link_join_netdevs_after_configured(link);
928
84de38c5 929 link_dirty(link);
dd43110f
TG		 930}
931
6accfd31
DA		 932void link_check_ready(Link *link) {
933 Address *a;
6accfd31
DA		 934
935 assert(link);
936
5f58af25
YW		 937 if (link->state == LINK_STATE_CONFIGURED)
938 return;
939
940 if (link->state != LINK_STATE_CONFIGURING) {
941 log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31 942 return;
39373cb9 943 }
6accfd31
DA		 944
945 if (!link->network)
946 return;
947
39373cb9
YW		 948 if (!link->addresses_configured) {
949 log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 950 return;
39373cb9 951 }
6accfd31 952
39373cb9
YW		 953 if (!link->neighbors_configured) {
954 log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
6accfd31 955 return;
39373cb9 956 }
6accfd31 957
90e74a66 958 SET_FOREACH(a, link->addresses)
39373cb9
YW		 959 if (!address_is_ready(a)) {
960 _cleanup_free_ char *str = NULL;
961
962 (void) in_addr_to_string(a->family, &a->in_addr, &str);
963 log_link_debug(link, "%s(): an address %s/%d is not ready.", __func__, strnull(str), a->prefixlen);
6aa5773b 964 return;
39373cb9 965 }
6aa5773b 966
39373cb9
YW		 967 if (!link->static_routes_configured) {
968 log_link_debug(link, "%s(): static routes are not configured.", __func__);
6accfd31 969 return;
39373cb9 970 }
6accfd31 971
39373cb9
YW		 972 if (!link->static_nexthops_configured) {
973 log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 974 return;
39373cb9 975 }
c16c7808 976
39373cb9
YW		 977 if (!link->routing_policy_rules_configured) {
978 log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 979 return;
39373cb9 980 }
6accfd31 981
39373cb9
YW		 982 if (!link->tc_configured) {
983 log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
4ecdcb07 984 return;
39373cb9 985 }
4ecdcb07 986
39373cb9
YW		 987 if (!link->sr_iov_configured) {
988 log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 989 return;
39373cb9 990 }
518cd6b5 991
1f241589
YW		 992 if (!link->bridge_mdb_configured) {
993 log_link_debug(link, "%s(): Bridge MDB is not configured.", __func__);
994 return;
995 }
996
463797c1 997 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
50550722
YW		 998 bool has_ndisc_address = false;
999 NDiscAddress *n;
6accfd31 1000
1c09d84e 1001 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !link->ipv4ll_address_configured) {
39373cb9 1002 log_link_debug(link, "%s(): IPv4LL is not configured.", __func__);
463797c1 1003 return;
39373cb9 1004 }
6accfd31 1005
463797c1 1006 if (link_ipv6ll_enabled(link) &&
39373cb9
YW		 1007 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
1008 log_link_debug(link, "%s(): IPv6LL is not configured.", __func__);
463797c1 1009 return;
39373cb9 1010 }
6accfd31 1011
90e74a66 1012 SET_FOREACH(n, link->ndisc_addresses)
50550722
YW		 1013 if (!n->marked) {
1014 has_ndisc_address = true;
1015 break;
1016 }
1017
15797d6a 1018 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
50550722 1019 !link->dhcp_address && set_isempty(link->dhcp6_addresses) && !has_ndisc_address &&
15797d6a
YW		 1020 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
1021 log_link_debug(link, "%s(): DHCP4 or DHCP6 is enabled but no dynamic address is assigned yet.", __func__);
659ad3a0
YW		 1022 return;
1023 }
1024
1633c457 1025 if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_dhcp6_pd_is_enabled(link) || link_ipv6_accept_ra_enabled(link)) {
39373cb9
YW		 1026 if (!link->dhcp4_configured &&
1027 !(link->dhcp6_address_configured && link->dhcp6_route_configured) &&
1028 !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) &&
d98c546d 1029 !(link->ndisc_addresses_configured && link->ndisc_routes_configured) &&
1c09d84e 1030 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
39373cb9
YW		 1031 /* When DHCP or RA is enabled, at least one protocol must provide an address, or
1032 * an IPv4ll fallback address must be configured. */
1033 log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
1034 return;
1035 }
1036
d98c546d 1037 log_link_debug(link, "%s(): dhcp4:%s dhcp6_addresses:%s dhcp_routes:%s dhcp_pd_addresses:%s dhcp_pd_routes:%s ndisc_addresses:%s ndisc_routes:%s",
39373cb9
YW		 1038 __func__,
1039 yes_no(link->dhcp4_configured),
1040 yes_no(link->dhcp6_address_configured),
1041 yes_no(link->dhcp6_route_configured),
1042 yes_no(link->dhcp6_pd_address_configured),
1043 yes_no(link->dhcp6_pd_route_configured),
d98c546d
YW		 1044 yes_no(link->ndisc_addresses_configured),
1045 yes_no(link->ndisc_routes_configured));
39373cb9 1046 }
463797c1 1047 }
6accfd31 1048
5f58af25 1049 link_enter_configured(link);
6accfd31
DA		 1050
1051 return;
1052}
1053
682c65b0 1054static int link_set_static_configs(Link *link) {
f882c247
TG		 1055 int r;
1056
1057 assert(link);
1058 assert(link->network);
f5be5601 1059 assert(link->state != _LINK_STATE_INVALID);
f882c247 1060
2428613f 1061 /* Reset all *_configured flags we are configuring. */
9b966cee 1062 link->request_static_addresses = false;
2428613f 1063 link->addresses_configured = false;
6aa5773b 1064 link->addresses_ready = false;
2428613f
YW		 1065 link->neighbors_configured = false;
1066 link->static_routes_configured = false;
c16c7808 1067 link->static_nexthops_configured = false;
2428613f
YW		 1068 link->routing_policy_rules_configured = false;
1069
f6bb7ac5
TJ		 1070 r = link_set_bridge_fdb(link);
1071 if (r < 0)
1072 return r;
1073
1f241589
YW		 1074 r = link_set_bridge_mdb(link);
1075 if (r < 0)
1076 return r;
1077
58f1fe9a 1078 r = link_set_neighbors(link);
f3ef324d
YW		 1079 if (r < 0)
1080 return r;
e4a71bf3 1081
682c65b0
YW		 1082 r = link_set_addresses(link);
1083 if (r < 0)
1084 return r;
bd6379ec 1085
fe2bc17c
YW		 1086 r = link_set_address_labels(link);
1087 if (r < 0)
1088 return r;
f882c247 1089
e5526518 1090 /* now that we can figure out a default address for the dhcp server, start it */
708c425d 1091 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
8fcf1d61 1092 r = dhcp4_server_configure(link);
4ff296b0 1093 if (r < 0)
d4cdbea5 1094 return r;
6a7a4e4d 1095 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1096 }
1097
f882c247
TG		 1098 return 0;
1099}
1100
13b498f9 1101static int link_set_bridge_vlan(Link *link) {
86e2be7b 1102 int r;
13b498f9
TJ		 1103
1104 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1105 if (r < 0)
1106 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1107
1108 return r;
1109}
1110
a60a720c 1111static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1112 int r;
1113
1114 if (!link_proxy_arp_enabled(link))
1115 return 0;
1116
62e021a9 1117 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1118 if (r < 0)
1119 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1120
1121 return 0;
1122}
1123
3a390124 1124static int link_configure_continue(Link *link);
55dc8c4a 1125
302a796f 1126static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1127 int r;
1128
1129 assert(m);
1130 assert(link);
1131 assert(link->ifname);
1132
55dc8c4a
YW		 1133 link->setting_mtu = false;
1134
5da8149f 1135 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1136 return 1;
1137
1c4baffc 1138 r = sd_netlink_message_get_errno(m);
4ff296b0 1139 if (r < 0)
5ecb131d 1140 log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring");
4ff296b0
YW		 1141 else
1142 log_link_debug(link, "Setting MTU done.");
55dc8c4a 1143
4ff296b0 1144 if (link->state == LINK_STATE_INITIALIZED) {
3a390124 1145 r = link_configure_continue(link);
4ff296b0
YW		 1146 if (r < 0)
1147 link_enter_failed(link);
1148 }
4f882b2a
TG		 1149
1150 return 1;
1151}
1152
933c70a0 1153int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1154 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1155 int r;
1156
1157 assert(link);
1158 assert(link->manager);
1159 assert(link->manager->rtnl);
1160
40288ece
YW		 1161 if (mtu == 0 || link->setting_mtu)
1162 return 0;
1163
933c70a0 1164 if (link->mtu == mtu)
ee493106
YW		 1165 return 0;
1166
6a7a4e4d 1167 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1168
6a7a4e4d
LP		 1169 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1170 if (r < 0)
1171 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1172
44b598a1 1173 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1174 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1175 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1176
1177 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
d236718c 1178 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes");
44b598a1 1179
72c2500b 1180 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1181 }
1182
1c4baffc 1183 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1184 if (r < 0)
1185 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1186
302a796f
YW		 1187 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1188 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1189 if (r < 0)
1190 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1191
ae941762 1192 link_ref(link);
1046bf9b 1193 link->setting_mtu = true;
b226d99b 1194
4f882b2a
TG		 1195 return 0;
1196}
1197
f6fcc1c2
YW		 1198static bool link_reduces_vlan_mtu(Link *link) {
1199 /* See netif_reduces_vlan_mtu() in kernel. */
1200 return streq_ptr(link->kind, "macsec");
1201}
1202
1203static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1204 uint32_t mtu = 0;
1205 NetDev *dev;
f6fcc1c2 1206
90e74a66 1207 HASHMAP_FOREACH(dev, link->network->stacked_netdevs)
f6fcc1c2
YW		 1208 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1209 /* See vlan_dev_change_mtu() in kernel. */
1210 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1211
1212 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1213 /* See macvlan_change_mtu() in kernel. */
1214 mtu = dev->mtu;
1215
1216 return mtu;
1217}
1218
1219static int link_configure_mtu(Link *link) {
1220 uint32_t mtu;
1221
1222 assert(link);
1223 assert(link->network);
1224
1225 if (link->network->mtu > 0)
1226 return link_set_mtu(link, link->network->mtu);
1227
1228 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1229 if (link->mtu >= mtu)
1230 return 0;
1231
1232 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1233 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1234 link->mtu, mtu);
1235
1236 return link_set_mtu(link, mtu);
1237}
1238
302a796f 1239static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1240 int r;
1241
1242 assert(m);
1243 assert(link);
1244 assert(link->ifname);
1245
1246 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1247 return 1;
1248
1249 r = sd_netlink_message_get_errno(m);
1250 if (r < 0)
5ecb131d 1251 log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring");
99d2baa2
SS		 1252
1253 return 1;
1254}
1255
1256static int link_set_flags(Link *link) {
1257 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1258 unsigned ifi_change = 0;
1259 unsigned ifi_flags = 0;
1260 int r;
1261
1262 assert(link);
1263 assert(link->manager);
1264 assert(link->manager->rtnl);
1265
1266 if (link->flags & IFF_LOOPBACK)
1267 return 0;
1268
1269 if (!link->network)
1270 return 0;
1271
866e6b7a 1272 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1273 return 0;
1274
1275 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1276 if (r < 0)
1277 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1278
1279 if (link->network->arp >= 0) {
1280 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1281 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1282 }
1283
1284 if (link->network->multicast >= 0) {
1285 ifi_change |= IFF_MULTICAST;
1286 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1287 }
1288
866e6b7a
SS		 1289 if (link->network->allmulticast >= 0) {
1290 ifi_change |= IFF_ALLMULTI;
1291 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1292 }
1293
99d2baa2
SS		 1294 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1295 if (r < 0)
1296 return log_link_error_errno(link, r, "Could not set link flags: %m");
1297
302a796f
YW		 1298 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1299 link_netlink_destroy_callback, link);
99d2baa2
SS		 1300 if (r < 0)
1301 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1302
1303 link_ref(link);
1304
1305 return 0;
1306}
1307
e7ab854c
TG		 1308static int link_acquire_ipv6_conf(Link *link) {
1309 int r;
1310
1311 assert(link);
1312
e7ab854c 1313 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1314 assert(link->ndisc);
e7ab854c
TG		 1315
1316 log_link_debug(link, "Discovering IPv6 routers");
1317
1e7a0e21 1318 r = sd_ndisc_start(link->ndisc);
63348d13 1319 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1320 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1321 }
1322
7465dd22
PF		 1323 if (link_radv_enabled(link)) {
1324 assert(link->radv);
1325 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1326
1327 log_link_debug(link, "Starting IPv6 Router Advertisements");
1328
fd3ef936
YW		 1329 r = radv_emit_dns(link);
1330 if (r < 0)
1331 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
1332
7465dd22
PF		 1333 r = sd_radv_start(link->radv);
1334 if (r < 0 && r != -EBUSY)
1335 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1336 }
1337
838d39af
SS		 1338 if (link_dhcp6_enabled(link) && IN_SET(link->network->dhcp6_without_ra,
1339 DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST,
1340 DHCP6_CLIENT_START_MODE_SOLICIT)) {
cd305af1
SS		 1341 assert(link->dhcp6_client);
1342 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1343
838d39af 1344 r = dhcp6_request_address(link, link->network->dhcp6_without_ra == DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST);
cd305af1 1345 if (r < 0 && r != -EBUSY)
1633c457 1346 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
cd305af1
SS		 1347 else
1348 log_link_debug(link, "Acquiring DHCPv6 lease");
1349 }
1350
1633c457
YW		 1351 r = dhcp6_request_prefix_delegation(link);
1352 if (r < 0)
1353 return log_link_warning_errno(link, r, "Failed to request DHCPv6 prefix delegation: %m");
10752343 1354
e7ab854c
TG		 1355 return 0;
1356}
1357
6fc25497 1358static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1359 int r;
1360
1361 assert(link);
ff254138
TG		 1362 assert(link->manager);
1363 assert(link->manager->event);
1364
910feb78 1365 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1366 assert(link->ipv4ll);
ff254138 1367
6a7a4e4d 1368 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1369
1370 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1371 if (r < 0)
1372 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1373 }
1374
78c958f8 1375 if (link_dhcp4_enabled(link)) {
eb34d4af 1376 assert(link->dhcp_client);
ff254138 1377
6a7a4e4d 1378 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1379
5c1d3fc9 1380 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1381 if (r < 0)
1382 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1383 }
ff254138 1384
6fc25497
SS		 1385 return 0;
1386}
1387
1388static int link_acquire_conf(Link *link) {
1389 int r;
1390
1391 assert(link);
1392
1393 r = link_acquire_ipv4_conf(link);
1394 if (r < 0)
1395 return r;
1396
3f7cc080 1397 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1398 r = link_acquire_ipv6_conf(link);
1399 if (r < 0)
1400 return r;
1401 }
1402
7272b25e
LP		 1403 if (link_lldp_emit_enabled(link)) {
1404 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1405 if (r < 0)
1406 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1407 }
1408
ff254138
TG		 1409 return 0;
1410}
1411
a61bb41c 1412bool link_has_carrier(Link *link) {
deb2e523
TG		 1413 /* see Documentation/networking/operstates.txt in the kernel sources */
1414
a61bb41c 1415 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1416 return true;
1417
a61bb41c 1418 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1419 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1420 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1421 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1422 return true;
1423
1424 return false;
1425}
1426
0e2fdb83
SS		 1427static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1428 int r;
1429
1430 assert(link);
1431
9524014e
DS		 1432 link->setting_genmode = false;
1433
0e2fdb83
SS		 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 address genmode for interface, ignoring");
9524014e
DS		 1440 else
1441 log_link_debug(link, "Setting address genmode done.");
1442
1443 if (link->state == LINK_STATE_INITIALIZED) {
1444 r = link_configure_continue(link);
1445 if (r < 0)
1446 link_enter_failed(link);
1447 }
0e2fdb83
SS		 1448
1449 return 1;
1450}
1451
1452static int link_configure_addrgen_mode(Link *link) {
1453 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1454 uint8_t ipv6ll_mode;
1455 int r;
1456
1457 assert(link);
1458 assert(link->network);
1459 assert(link->manager);
1460 assert(link->manager->rtnl);
1461
9524014e 1462 if (!socket_ipv6_is_supported() || link->setting_genmode)
9f6e82e6
YW		 1463 return 0;
1464
0e2fdb83
SS		 1465 log_link_debug(link, "Setting address genmode for link");
1466
1467 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1468 if (r < 0)
1469 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1470
1471 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1472 if (r < 0)
1473 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1474
1475 r = sd_netlink_message_open_container(req, AF_INET6);
1476 if (r < 0)
1477 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1478
1479 if (!link_ipv6ll_enabled(link))
1480 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
6f6296b9 1481 else if (link->network->ipv6ll_address_gen_mode < 0) {
a6f1848a
SS		 1482 r = sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL);
1483 if (r < 0) {
1484 /* The file may not exist. And even if it exists, when stable_secret is unset,
1485 * reading the file fails with EIO. */
1486 log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret: %m");
1487
1488 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1489 } else
1490 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1491 } else
6f6296b9 1492 ipv6ll_mode = link->network->ipv6ll_address_gen_mode;
0e2fdb83
SS		 1493
1494 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1495 if (r < 0)
1496 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1497
1498 r = sd_netlink_message_close_container(req);
1499 if (r < 0)
1500 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1501
1502 r = sd_netlink_message_close_container(req);
1503 if (r < 0)
1504 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1505
1506 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1507 link_netlink_destroy_callback, link);
1508 if (r < 0)
1509 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1510
1511 link_ref(link);
9524014e 1512 link->setting_genmode = true;
0e2fdb83
SS		 1513
1514 return 0;
1515}
1516
302a796f 1517static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1518 int r;
1519
1746cf2a
TG		 1520 assert(link);
1521
5da8149f 1522 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1523 return 1;
1524
1c4baffc 1525 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1526 if (r < 0)
26d6b214 1527 /* we warn but don't fail the link, as it may be brought up later */
5ecb131d 1528 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
45ad2c13 1529
f882c247
TG		 1530 return 1;
1531}
1532
1cc84f3b 1533static int link_up(Link *link) {
4afd3348 1534 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1535 int r;
1536
f882c247 1537 assert(link);
c106cc36 1538 assert(link->network);
f882c247
TG		 1539 assert(link->manager);
1540 assert(link->manager->rtnl);
1541
6a7a4e4d 1542 log_link_debug(link, "Bringing link up");
449f7554 1543
6a7a4e4d
LP		 1544 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1545 if (r < 0)
1546 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1547
2b2d8603 1548 /* set it free if not enslaved with networkd */
6cb955c6 1549 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1550 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1551 if (r < 0)
1552 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1553 }
1554
5d4795f3 1555 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1556 if (r < 0)
1557 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1558
c106cc36 1559 if (link->network->mac) {
1c4baffc 1560 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1561 if (r < 0)
1562 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1563 }
1564
302a796f
YW		 1565 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1566 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1567 if (r < 0)
1568 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1569
b226d99b
TG		 1570 link_ref(link);
1571
f882c247
TG		 1572 return 0;
1573}
1574
302a796f 1575static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1576 int r;
1577
1578 assert(link);
1579
1580 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1581 return 1;
1582
1c4baffc 1583 r = sd_netlink_message_get_errno(m);
0d4ad91d 1584 if (r < 0)
5ecb131d 1585 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
0d4ad91d
AR		 1586
1587 return 1;
1588}
1589
8e54db83 1590int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1591 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1592 int r;
1593
1594 assert(link);
1595 assert(link->manager);
1596 assert(link->manager->rtnl);
1597
6a7a4e4d 1598 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1599
1600 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1601 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1602 if (r < 0)
1603 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1604
1605 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1606 if (r < 0)
1607 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1608
8e54db83
YW		 1609 r = netlink_call_async(link->manager->rtnl, NULL, req,
1610 callback ?: link_down_handler,
302a796f 1611 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1612 if (r < 0)
1613 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1614
1615 link_ref(link);
1616
1617 return 0;
1618}
1619
89fe6535
SS		 1620static int link_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1621 int r;
1622
1623 assert(link);
1624
1625 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1626 return 1;
1627
1628 r = sd_netlink_message_get_errno(m);
1629 if (r < 0)
1630 log_link_message_warning_errno(link, m, r, "Could not set group for the interface");
1631
1632 return 1;
1633}
1634
1635static int link_set_group(Link *link) {
1636 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1637 int r;
1638
1639 assert(link);
1640 assert(link->network);
1641 assert(link->manager);
1642 assert(link->manager->rtnl);
1643
1644 if (link->network->group <= 0)
1645 return 0;
1646
1647 log_link_debug(link, "Setting group");
1648
1649 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1650 if (r < 0)
1651 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1652
1653 r = sd_netlink_message_append_u32(req, IFLA_GROUP, link->network->group);
1654 if (r < 0)
1655 return log_link_error_errno(link, r, "Could not set link group: %m");
1656
1657 r = netlink_call_async(link->manager->rtnl, NULL, req, link_group_handler,
1658 link_netlink_destroy_callback, link);
1659 if (r < 0)
1660 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1661
1662 link_ref(link);
1663
1664 return 0;
1665}
1666
0d4ad91d
AR		 1667static int link_handle_bound_to_list(Link *link) {
1668 Link *l;
0d4ad91d
AR		 1669 int r;
1670 bool required_up = false;
1671 bool link_is_up = false;
1672
1673 assert(link);
1674
1675 if (hashmap_isempty(link->bound_to_links))
1676 return 0;
1677
1678 if (link->flags & IFF_UP)
1679 link_is_up = true;
1680
90e74a66 1681 HASHMAP_FOREACH (l, link->bound_to_links)
0d4ad91d
AR		 1682 if (link_has_carrier(l)) {
1683 required_up = true;
1684 break;
1685 }
1686
1687 if (!required_up && link_is_up) {
8e54db83 1688 r = link_down(link, NULL);
0d4ad91d
AR		 1689 if (r < 0)
1690 return r;
1691 } else if (required_up && !link_is_up) {
1692 r = link_up(link);
1693 if (r < 0)
1694 return r;
1695 }
1696
1697 return 0;
1698}
1699
1700static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 1701 Link *l;
1702 int r;
1703
1704 assert(link);
1705
1706 if (hashmap_isempty(link->bound_by_links))
1707 return 0;
1708
90e74a66 1709 HASHMAP_FOREACH (l, link->bound_by_links) {
0d4ad91d
AR		 1710 r = link_handle_bound_to_list(l);
1711 if (r < 0)
1712 return r;
1713 }
1714
1715 return 0;
1716}
1717
1718static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1719 int r;
1720
1721 assert(link);
1722 assert(carrier);
1723
1724 if (link == carrier)
1725 return 0;
1726
1727 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1728 return 0;
1729
1730 r = hashmap_ensure_allocated(h, NULL);
1731 if (r < 0)
1732 return r;
1733
1734 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1735 if (r < 0)
1736 return r;
1737
1738 return 0;
1739}
1740
1741static int link_new_bound_by_list(Link *link) {
1742 Manager *m;
1743 Link *carrier;
0d4ad91d
AR		 1744 int r;
1745 bool list_updated = false;
1746
1747 assert(link);
1748 assert(link->manager);
1749
1750 m = link->manager;
1751
90e74a66 1752 HASHMAP_FOREACH(carrier, m->links) {
0d4ad91d
AR		 1753 if (!carrier->network)
1754 continue;
1755
1756 if (strv_isempty(carrier->network->bind_carrier))
1757 continue;
1758
191a3f16 1759 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 1760 r = link_put_carrier(link, carrier, &link->bound_by_links);
1761 if (r < 0)
1762 return r;
1763
1764 list_updated = true;
1765 }
1766 }
1767
1768 if (list_updated)
84de38c5 1769 link_dirty(link);
0d4ad91d 1770
90e74a66 1771 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 1772 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1773 if (r < 0)
1774 return r;
1775
84de38c5 1776 link_dirty(carrier);
0d4ad91d
AR		 1777 }
1778
1779 return 0;
1780}
1781
1782static int link_new_bound_to_list(Link *link) {
1783 Manager *m;
1784 Link *carrier;
0d4ad91d
AR		 1785 int r;
1786 bool list_updated = false;
1787
1788 assert(link);
1789 assert(link->manager);
1790
1791 if (!link->network)
1792 return 0;
1793
1794 if (strv_isempty(link->network->bind_carrier))
1795 return 0;
1796
1797 m = link->manager;
1798
90e74a66 1799 HASHMAP_FOREACH (carrier, m->links) {
191a3f16 1800 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 1801 r = link_put_carrier(link, carrier, &link->bound_to_links);
1802 if (r < 0)
1803 return r;
1804
1805 list_updated = true;
1806 }
1807 }
1808
1809 if (list_updated)
84de38c5 1810 link_dirty(link);
0d4ad91d 1811
90e74a66 1812 HASHMAP_FOREACH (carrier, link->bound_to_links) {
0d4ad91d
AR		 1813 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1814 if (r < 0)
1815 return r;
1816
84de38c5 1817 link_dirty(carrier);
0d4ad91d
AR		 1818 }
1819
1820 return 0;
1821}
1822
1823static int link_new_carrier_maps(Link *link) {
1824 int r;
1825
1826 r = link_new_bound_by_list(link);
1827 if (r < 0)
1828 return r;
1829
1830 r = link_handle_bound_by_list(link);
1831 if (r < 0)
1832 return r;
1833
1834 r = link_new_bound_to_list(link);
1835 if (r < 0)
1836 return r;
1837
1838 r = link_handle_bound_to_list(link);
1839 if (r < 0)
1840 return r;
1841
1842 return 0;
1843}
1844
1845static void link_free_bound_to_list(Link *link) {
1846 Link *bound_to;
0d4ad91d 1847
90e74a66 1848 HASHMAP_FOREACH (bound_to, link->bound_to_links) {
0d4ad91d
AR		 1849 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
1850
1851 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 1852 link_dirty(bound_to);
0d4ad91d
AR		 1853 }
1854
1855 return;
1856}
1857
1858static void link_free_bound_by_list(Link *link) {
1859 Link *bound_by;
0d4ad91d 1860
90e74a66 1861 HASHMAP_FOREACH (bound_by, link->bound_by_links) {
0d4ad91d
AR		 1862 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
1863
1864 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 1865 link_dirty(bound_by);
0d4ad91d
AR		 1866 link_handle_bound_to_list(bound_by);
1867 }
1868 }
1869
1870 return;
1871}
1872
1873static void link_free_carrier_maps(Link *link) {
1874 bool list_updated = false;
1875
1876 assert(link);
1877
1878 if (!hashmap_isempty(link->bound_to_links)) {
1879 link_free_bound_to_list(link);
1880 list_updated = true;
1881 }
1882
1883 if (!hashmap_isempty(link->bound_by_links)) {
1884 link_free_bound_by_list(link);
1885 list_updated = true;
1886 }
1887
1888 if (list_updated)
84de38c5 1889 link_dirty(link);
0d4ad91d
AR		 1890
1891 return;
1892}
1893
5f707e12
YW		 1894static int link_append_to_master(Link *link, NetDev *netdev) {
1895 Link *master;
1896 int r;
1897
1898 assert(link);
1899 assert(netdev);
1900
1901 r = link_get(link->manager, netdev->ifindex, &master);
1902 if (r < 0)
1903 return r;
1904
de7fef4b 1905 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 1906 if (r <= 0)
5f707e12
YW		 1907 return r;
1908
1909 link_ref(link);
1910 return 0;
1911}
1912
1913static void link_drop_from_master(Link *link, NetDev *netdev) {
1914 Link *master;
1915
1916 assert(link);
1917
1918 if (!link->manager || !netdev)
1919 return;
1920
1921 if (link_get(link->manager, netdev->ifindex, &master) < 0)
1922 return;
1923
1924 link_unref(set_remove(master->slaves, link));
1925}
1926
1927static void link_detach_from_manager(Link *link) {
1928 if (!link || !link->manager)
1929 return;
1930
1931 link_unref(set_remove(link->manager->links_requesting_uuid, link));
1932 link_clean(link);
1933
1934 /* The following must be called at last. */
1935 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
1936 link_unref(link);
1937}
1938
0d4ad91d
AR		 1939void link_drop(Link *link) {
1940 if (!link || link->state == LINK_STATE_LINGER)
1941 return;
1942
1943 link_set_state(link, LINK_STATE_LINGER);
1944
1945 link_free_carrier_maps(link);
1946
5f707e12
YW		 1947 if (link->network) {
1948 link_drop_from_master(link, link->network->bridge);
1949 link_drop_from_master(link, link->network->bond);
1950 }
1951
6a7a4e4d 1952 log_link_debug(link, "Link removed");
0d4ad91d 1953
db2f8a2e 1954 (void) unlink(link->state_file);
c4397d94 1955 link_detach_from_manager(link);
0d4ad91d
AR		 1956}
1957
3f265037 1958static int link_joined(Link *link) {
f882c247
TG		 1959 int r;
1960
ef1ba606 1961 assert(link);
f5be5601 1962 assert(link->network);
dd3efc09 1963
0d4ad91d
AR		 1964 if (!hashmap_isempty(link->bound_to_links)) {
1965 r = link_handle_bound_to_list(link);
1966 if (r < 0)
1967 return r;
1968 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 1969 r = link_up(link);
1970 if (r < 0) {
1971 link_enter_failed(link);
1972 return r;
1973 }
ef1ba606 1974 }
f882c247 1975
9ed794a3 1976 if (link->network->bridge) {
e1853b00 1977 r = link_set_bridge(link);
6a7a4e4d
LP		 1978 if (r < 0)
1979 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 1980
1981 r = link_append_to_master(link, link->network->bridge);
1982 if (r < 0)
1983 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 1984 }
1985
eb64b435 1986 if (link->network->bond) {
7fcee284 1987 r = link_set_bond(link);
eb64b435
SS		 1988 if (r < 0)
1989 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 1990
45e11abf 1991 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 1992 if (r < 0)
1993 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 1994 }
1995
ffff9abe
TJ		 1996 if (link->network->use_br_vlan &&
1997 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 1998 r = link_set_bridge_vlan(link);
1999 if (r < 0)
2000 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2001 }
2002
c1835a42
RM		 2003 /* Skip setting up addresses until it gets carrier,
2004 or it would try to set addresses twice,
2005 which is bad for non-idempotent steps. */
dad2d78e 2006 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2007 return 0;
2008
b425c3ae 2009 link_set_state(link, LINK_STATE_CONFIGURING);
682c65b0 2010 return link_set_static_configs(link);
02b59d57
TG		 2011}
2012
302a796f 2013static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2014 int r;
2015
1746cf2a 2016 assert(link);
ef1ba606 2017 assert(link->network);
34bf3c00 2018 assert(link->enslaving > 0);
02b59d57 2019
313cefa1 2020 link->enslaving--;
52433f6b 2021
5da8149f 2022 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2023 return 1;
2024
1c4baffc 2025 r = sd_netlink_message_get_errno(m);
856f962c 2026 if (r < 0 && r != -EEXIST) {
5ecb131d 2027 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG		 2028 link_enter_failed(link);
2029 return 1;
4ff296b0
YW		 2030 }
2031
2032 log_link_debug(link, "Joined netdev");
02b59d57 2033
34bf3c00 2034 if (link->enslaving == 0) {
4ff296b0
YW		 2035 r = link_joined(link);
2036 if (r < 0)
2037 link_enter_failed(link);
34bf3c00 2038 }
02b59d57
TG		 2039
2040 return 1;
2041}
2042
3f265037 2043static int link_enter_join_netdev(Link *link) {
6a0a2f86 2044 NetDev *netdev;
02b59d57
TG		 2045 int r;
2046
2047 assert(link);
2048 assert(link->network);
bd08ce56 2049 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2050
289e6774 2051 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2052
84de38c5 2053 link_dirty(link);
34bf3c00 2054 link->enslaving = 0;
02b59d57 2055
d9c67ea1 2056 if (link->network->bond) {
cbff7170
TJ		 2057 if (link->network->bond->state == NETDEV_STATE_READY &&
2058 link->network->bond->ifindex == link->master_ifindex)
2059 return link_joined(link);
2060
f2341e0a
LP		 2061 log_struct(LOG_DEBUG,
2062 LOG_LINK_INTERFACE(link),
2063 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2064 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2065
34bf3c00
YW		 2066 link->enslaving++;
2067
f2341e0a 2068 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2069 if (r < 0) {
f2341e0a
LP		 2070 log_struct_errno(LOG_WARNING, r,
2071 LOG_LINK_INTERFACE(link),
2072 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2073 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2074 link_enter_failed(link);
2075 return r;
2076 }
0ad6148e
MO		 2077 }
2078
d9c67ea1 2079 if (link->network->bridge) {
f2341e0a
LP		 2080 log_struct(LOG_DEBUG,
2081 LOG_LINK_INTERFACE(link),
2082 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2083 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2084
34bf3c00
YW		 2085 link->enslaving++;
2086
f2341e0a 2087 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2088 if (r < 0) {
f2341e0a
LP		 2089 log_struct_errno(LOG_WARNING, r,
2090 LOG_LINK_INTERFACE(link),
2091 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2092 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2093 link_enter_failed(link);
2094 return r;
2095 }
52433f6b
TG		 2096 }
2097
6cb955c6
AR		 2098 if (link->network->vrf) {
2099 log_struct(LOG_DEBUG,
2100 LOG_LINK_INTERFACE(link),
2101 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2102 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2103
34bf3c00
YW		 2104 link->enslaving++;
2105
6cb955c6
AR		 2106 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2107 if (r < 0) {
2108 log_struct_errno(LOG_WARNING, r,
2109 LOG_LINK_INTERFACE(link),
2110 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2111 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2112 link_enter_failed(link);
2113 return r;
2114 }
6cb955c6
AR		 2115 }
2116
90e74a66 2117 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7951dea2 2118
2b6db913
YW		 2119 if (netdev->ifindex > 0)
2120 /* Assume already enslaved. */
a63e5daa 2121 continue;
a63e5daa 2122
7033af49
YW		 2123 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2124 continue;
2125
f2341e0a
LP		 2126 log_struct(LOG_DEBUG,
2127 LOG_LINK_INTERFACE(link),
2128 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2129 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2130
34bf3c00
YW		 2131 link->enslaving++;
2132
f2341e0a 2133 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2134 if (r < 0) {
f2341e0a
LP		 2135 log_struct_errno(LOG_WARNING, r,
2136 LOG_LINK_INTERFACE(link),
2137 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2138 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2139 link_enter_failed(link);
2140 return r;
2141 }
326cb406
SS		 2142 }
2143
34bf3c00
YW		 2144 if (link->enslaving == 0)
2145 return link_joined(link);
2146
ef1ba606
TG		 2147 return 0;
2148}
2149
769d324c 2150static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2151 int r;
2152
765afd5c 2153 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2154 return 0;
2155
765afd5c
LP		 2156 /* We propagate the forwarding flag from one interface to the
2157 * global setting one way. This means: as long as at least one
2158 * interface was configured at any time that had IP forwarding
2159 * enabled the setting will stay on for good. We do this
2160 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2161 * somewhat in sync (see below). */
15dee3f0 2162
62e021a9 2163 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2164 if (r < 0)
765afd5c 2165 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2166
769d324c
LP		 2167 return 0;
2168}
2169
2170static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2171 int r;
2172
765afd5c 2173 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2174 return 0;
2175
61233823 2176 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2177 * packet forwarding setting: either packet forwarding is on
2178 * for all, or off for all. We hence don't bother with a
2179 * per-interface setting, but simply propagate the interface
2180 * flag, if it is set, to the global flag, one-way. Note that
2181 * while IPv4 would allow a per-interface flag, we expose the
2182 * same behaviour there and also propagate the setting from
2183 * one to all, to keep things simple (see above). */
15dee3f0 2184
62e021a9 2185 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2186 if (r < 0)
765afd5c 2187 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2188
2189 return 0;
2190}
2191
49092e22 2192static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2193 IPv6PrivacyExtensions s;
49092e22
SS		 2194 int r;
2195
1f0d9695 2196 s = link_ipv6_privacy_extensions(link);
66a6bd68 2197 if (s < 0)
49092e22
SS		 2198 return 0;
2199
62e021a9 2200 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2201 if (r < 0)
49092e22
SS		 2202 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2203
2204 return 0;
2205}
2206
4f2e437a 2207static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2208 int r;
2209
2210 /* Make this a NOP if IPv6 is not available */
2211 if (!socket_ipv6_is_supported())
2212 return 0;
2213
2214 if (link->flags & IFF_LOOPBACK)
2215 return 0;
2216
d68e2e59
LP		 2217 if (!link->network)
2218 return 0;
2219
62e021a9 2220 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2221 if (r < 0)
fe307276 2222 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2223
2224 return 0;
2225}
2226
8749cbcd 2227static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2228 int r;
2229
2230 /* Make this a NOP if IPv6 is not available */
2231 if (!socket_ipv6_is_supported())
2232 return 0;
2233
2234 if (link->flags & IFF_LOOPBACK)
2235 return 0;
2236
d68e2e59
LP		 2237 if (!link->network)
2238 return 0;
2239
8749cbcd
SS		 2240 if (link->network->ipv6_dad_transmits < 0)
2241 return 0;
2242
62e021a9 2243 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2244 if (r < 0)
8749cbcd 2245 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2246
2247 return 0;
2248}
2249
b69c3180 2250static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2251 int r;
2252
2253 /* Make this a NOP if IPv6 is not available */
2254 if (!socket_ipv6_is_supported())
2255 return 0;
2256
2257 if (link->flags & IFF_LOOPBACK)
2258 return 0;
2259
d68e2e59
LP		 2260 if (!link->network)
2261 return 0;
2262
b69c3180
SS		 2263 if (link->network->ipv6_hop_limit < 0)
2264 return 0;
2265
62e021a9 2266 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2267 if (r < 0)
b69c3180 2268 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2269
2270 return 0;
2271}
2272
11102cba 2273static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2274 int r;
2275
2276 /* Make this a NOP if IPv6 is not available */
2277 if (!socket_ipv6_is_supported())
2278 return 0;
2279
2280 if (link->flags & IFF_LOOPBACK)
2281 return 0;
2282
2283 if (link->network->ipv6_mtu == 0)
2284 return 0;
2285
d236718c
DS		 2286 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
2287 * on the interface. Bump up IPv6 MTU bytes to IPV6_MTU_MIN. */
2288 if (link->network->ipv6_mtu < IPV6_MIN_MTU) {
2289 log_link_notice(link, "Bumping IPv6 MTU to "STRINGIFY(IPV6_MIN_MTU)" byte minimum required");
2290 link->network->ipv6_mtu = IPV6_MIN_MTU;
2291 }
2292
62e021a9 2293 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
d236718c
DS		 2294 if (r < 0) {
2295 if (link->mtu < link->network->ipv6_mtu)
2296 log_link_warning(link, "Cannot set IPv6 MTU %"PRIu32" higher than device MTU %"PRIu32,
2297 link->network->ipv6_mtu, link->mtu);
2298 else
2299 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2300 }
2301
2302 link->ipv6_mtu_set = true;
11102cba
SS		 2303
2304 return 0;
2305}
2306
94d76d07
YW		 2307static int link_set_ipv4_accept_local(Link *link) {
2308 int r;
2309
2310 if (link->flags & IFF_LOOPBACK)
2311 return 0;
2312
2313 if (link->network->ipv4_accept_local < 0)
2314 return 0;
2315
2316 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "accept_local", link->network->ipv4_accept_local);
2317 if (r < 0)
2318 log_link_warning_errno(link, r, "Cannot set IPv4 accept_local flag for interface: %m");
2319
2320 return 0;
2321}
2322
30226d27
TJ		 2323static bool link_is_static_address_configured(Link *link, Address *address) {
2324 Address *net_address;
2325
2326 assert(link);
2327 assert(address);
2328
2329 if (!link->network)
2330 return false;
2331
2332 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2333 if (address_equal(net_address, address))
2334 return true;
6f5d73ab
YW		 2335 else if (address->family == AF_INET6 && net_address->family == AF_INET6 &&
2336 in_addr_equal(AF_INET6, &address->in_addr, &net_address->in_addr_peer) > 0)
2337 return true;
30226d27
TJ		 2338
2339 return false;
2340}
2341
db51778f
YW		 2342static bool link_address_is_dynamic(Link *link, Address *address) {
2343 Route *route;
db51778f
YW		 2344
2345 assert(link);
2346 assert(address);
2347
2348 if (address->cinfo.ifa_prefered != CACHE_INFO_INFINITY_LIFE_TIME)
2349 return true;
2350
2351 /* Even when the address is leased from a DHCP server, networkd assign the address
2352 * without lifetime when KeepConfiguration=dhcp. So, let's check that we have
2353 * corresponding routes with RTPROT_DHCP. */
90e74a66 2354 SET_FOREACH(route, link->routes_foreign) {
db51778f
YW		 2355 if (route->protocol != RTPROT_DHCP)
2356 continue;
2357
2358 if (address->family != route->family)
2359 continue;
2360
2361 if (in_addr_equal(address->family, &address->in_addr, &route->prefsrc))
2362 return true;
2363 }
2364
2365 return false;
2366}
2367
0917a271
DS		 2368static int link_enumerate_ipv6_tentative_addresses(Link *link) {
2369 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
2370 sd_netlink_message *addr;
2371 int r;
2372
2373 assert(link);
2374 assert(link->manager);
2375 assert(link->manager->rtnl);
2376
2377 r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_GETADDR, 0, AF_INET6);
2378 if (r < 0)
2379 return r;
2380
2381 r = sd_netlink_call(link->manager->rtnl, req, 0, &reply);
2382 if (r < 0)
2383 return r;
2384
2385 for (addr = reply; addr; addr = sd_netlink_message_next(addr)) {
2386 unsigned char flags;
2387 int ifindex;
2388
2389 r = sd_rtnl_message_addr_get_ifindex(addr, &ifindex);
2390 if (r < 0) {
2391 log_link_warning_errno(link, r, "rtnl: invalid ifindex, ignoring: %m");
2392 continue;
2393 } else if (link->ifindex != ifindex)
2394 continue;
2395
2396 r = sd_rtnl_message_addr_get_flags(addr, &flags);
2397 if (r < 0) {
2398 log_link_warning_errno(link, r, "rtnl: received address message with invalid flags, ignoring: %m");
2399 continue;
2400 } else if (!(flags & IFA_F_TENTATIVE))
2401 continue;
2402
2403 log_link_debug(link, "Found tentative ipv6 link-local address");
2404 (void) manager_rtnl_process_address(link->manager->rtnl, addr, link->manager);
2405 }
2406
2407 return 0;
2408}
2409
5e5b137a
TG		 2410static int link_drop_foreign_config(Link *link) {
2411 Address *address;
5e5b137a
TG		 2412 int r;
2413
0917a271
DS		 2414 /* The kernel doesn't notify us about tentative addresses;
2415 * so if ipv6ll is disabled, we need to enumerate them now so we can drop them below */
2416 if (!link_ipv6ll_enabled(link)) {
2417 r = link_enumerate_ipv6_tentative_addresses(link);
2418 if (r < 0)
2419 return r;
2420 }
2421
90e74a66 2422 SET_FOREACH(address, link->addresses_foreign) {
fe307276 2423 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2424 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
5e5b137a
TG		 2425 continue;
2426
db51778f 2427 if (link_address_is_dynamic(link, address)) {
b1b0b42e 2428 if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
db51778f 2429 continue;
b1b0b42e 2430 } else if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
db51778f
YW		 2431 continue;
2432
30226d27
TJ		 2433 if (link_is_static_address_configured(link, address)) {
2434 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2435 if (r < 0)
2436 return log_link_error_errno(link, r, "Failed to add address: %m");
2437 } else {
63ae0569 2438 r = address_remove(address, link, NULL);
30226d27
TJ		 2439 if (r < 0)
2440 return r;
2441 }
5e5b137a
TG		 2442 }
2443
59048336
YW		 2444 r = link_drop_foreign_neighbors(link);
2445 if (r < 0)
2446 return r;
d1bdafd2 2447
779804dd 2448 return link_drop_foreign_routes(link);
5e5b137a
TG		 2449}
2450
9b966cee
YW		 2451static int remove_static_address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2452 int r;
2453
2454 assert(m);
2455 assert(link);
2456 assert(link->ifname);
2457 assert(link->address_remove_messages > 0);
2458
2459 link->address_remove_messages--;
2460
2461 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2462 return 1;
2463
2464 r = sd_netlink_message_get_errno(m);
2465 if (r < 0 && r != -EADDRNOTAVAIL)
2466 log_link_message_warning_errno(link, m, r, "Could not drop address");
2467 else if (r >= 0)
2468 (void) manager_rtnl_process_address(rtnl, m, link->manager);
2469
2470 if (link->address_remove_messages == 0 && link->request_static_addresses) {
2471 link_set_state(link, LINK_STATE_CONFIGURING);
682c65b0 2472 r = link_set_addresses(link);
9b966cee
YW		 2473 if (r < 0)
2474 link_enter_failed(link);
2475 }
2476
2477 return 1;
2478}
2479
3104883d 2480static int link_drop_config(Link *link) {
410a7f15 2481 Address *address, *pool_address;
3104883d
SS		 2482 int r;
2483
90e74a66 2484 SET_FOREACH(address, link->addresses) {
3104883d 2485 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2486 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
3104883d
SS		 2487 continue;
2488
9b966cee 2489 r = address_remove(address, link, remove_static_address_handler);
3104883d
SS		 2490 if (r < 0)
2491 return r;
410a7f15 2492
9b966cee
YW		 2493 link->address_remove_messages++;
2494
410a7f15 2495 /* If this address came from an address pool, clean up the pool */
b6766fb1 2496 LIST_FOREACH(addresses, pool_address, link->pool_addresses)
410a7f15
RM		 2497 if (address_equal(address, pool_address)) {
2498 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2499 address_free(pool_address);
2500 break;
2501 }
3104883d
SS		 2502 }
2503
59048336
YW		 2504 r = link_drop_neighbors(link);
2505 if (r < 0)
2506 return r;
d1bdafd2 2507
62f0ea5f
YW		 2508 r = link_drop_routes(link);
2509 if (r < 0)
2510 return r;
3104883d 2511
c69305ff
LP		 2512 ndisc_flush(link);
2513
3104883d
SS		 2514 return 0;
2515}
2516
051e77ca
SS		 2517static int link_configure_ipv4_dad(Link *link) {
2518 Address *address;
2519 int r;
2520
2521 assert(link);
2522 assert(link->network);
2523
2524 LIST_FOREACH(addresses, address, link->network->static_addresses)
2525 if (address->family == AF_INET &&
2526 FLAGS_SET(address->duplicate_address_detection, ADDRESS_FAMILY_IPV4)) {
2527 r = configure_ipv4_duplicate_address_detection(link, address);
2528 if (r < 0)
2529 return log_link_error_errno(link, r, "Failed to configure IPv4ACD: %m");
2530 }
2531
2532 return 0;
2533}
2534
34658df2
YW		 2535static int link_configure_traffic_control(Link *link) {
2536 TrafficControl *tc;
02b59d57
TG		 2537 int r;
2538
34658df2
YW		 2539 link->tc_configured = false;
2540 link->tc_messages = 0;
4ecdcb07 2541
90e74a66 2542 ORDERED_HASHMAP_FOREACH(tc, link->network->tc_by_section) {
34658df2 2543 r = traffic_control_configure(link, tc);
4ecdcb07
YW		 2544 if (r < 0)
2545 return r;
2546 }
2547
34658df2
YW		 2548 if (link->tc_messages == 0)
2549 link->tc_configured = true;
4ecdcb07 2550 else
34658df2 2551 log_link_debug(link, "Configuring traffic control");
4ecdcb07
YW		 2552
2553 return 0;
2554}
2555
518cd6b5
SS		 2556static int link_configure_sr_iov(Link *link) {
2557 SRIOV *sr_iov;
518cd6b5
SS		 2558 int r;
2559
2560 link->sr_iov_configured = false;
2561 link->sr_iov_messages = 0;
2562
90e74a66 2563 ORDERED_HASHMAP_FOREACH(sr_iov, link->network->sr_iov_by_section) {
518cd6b5
SS		 2564 r = sr_iov_configure(link, sr_iov);
2565 if (r < 0)
2566 return r;
2567 }
2568
2569 if (link->sr_iov_messages == 0)
2570 link->sr_iov_configured = true;
2571 else
2572 log_link_debug(link, "Configuring SR-IOV");
2573
2574 return 0;
2575}
2576
4ecdcb07
YW		 2577static int link_configure(Link *link) {
2578 int r;
2579
ef1ba606 2580 assert(link);
b22d8a00 2581 assert(link->network);
bd08ce56 2582 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2583
34658df2 2584 r = link_configure_traffic_control(link);
4ecdcb07
YW		 2585 if (r < 0)
2586 return r;
2587
518cd6b5
SS		 2588 r = link_configure_sr_iov(link);
2589 if (r < 0)
2590 return r;
2591
500b96eb 2592 if (link->iftype == ARPHRD_CAN)
93ea7750 2593 return link_configure_can(link);
92c918b0 2594
482efedc
SS		 2595 /* If IPv6 configured that is static IPv6 address and IPv6LL autoconfiguration is enabled
2596 * for this interface, then enable IPv6 */
57ad7607 2597 (void) link_update_ipv6_sysctl(link);
482efedc 2598
23d8b221
SS		 2599 r = link_set_proxy_arp(link);
2600 if (r < 0)
2601 return r;
2602
c16b5821 2603 r = link_set_ipv6_proxy_ndp_addresses(link);
a0e5c15d
FK		 2604 if (r < 0)
2605 return r;
2606
769d324c
LP		 2607 r = link_set_ipv4_forward(link);
2608 if (r < 0)
2609 return r;
2610
2611 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2612 if (r < 0)
2613 return r;
2614
49092e22
SS		 2615 r = link_set_ipv6_privacy_extensions(link);
2616 if (r < 0)
2617 return r;
2618
4f2e437a
SS		 2619 r = link_set_ipv6_accept_ra(link);
2620 if (r < 0)
2621 return r;
2622
8749cbcd
SS		 2623 r = link_set_ipv6_dad_transmits(link);
2624 if (r < 0)
2625 return r;
b69c3180
SS		 2626
2627 r = link_set_ipv6_hop_limit(link);
2628 if (r < 0)
2629 return r;
8749cbcd 2630
94d76d07
YW		 2631 r = link_set_ipv4_accept_local(link);
2632 if (r < 0)
2633 return r;
2634
99d2baa2
SS		 2635 r = link_set_flags(link);
2636 if (r < 0)
2637 return r;
2638
89fe6535
SS		 2639 r = link_set_group(link);
2640 if (r < 0)
2641 return r;
2642
910feb78 2643 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
b22d8a00 2644 r = ipv4ll_configure(link);
eb34d4af
TG		 2645 if (r < 0)
2646 return r;
2647 }
2648
78c958f8 2649 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2650 r = dhcp4_set_promote_secondaries(link);
2651 if (r < 0)
2652 return r;
2653
3c9b8860 2654 r = dhcp4_configure(link);
eb34d4af
TG		 2655 if (r < 0)
2656 return r;
eb34d4af
TG		 2657 }
2658
78c958f8 2659 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2660 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2661 if (r < 0)
2662 return r;
2663
2664 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2665 if (r < 0)
2666 return r;
dd43110f
TG		 2667 }
2668
62379e88
TG		 2669 if (link_dhcp6_enabled(link) ||
2670 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2671 r = dhcp6_configure(link);
2672 if (r < 0)
2673 return r;
2674 }
2675
2676 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2677 r = ndisc_configure(link);
4138fb2c
PF		 2678 if (r < 0)
2679 return r;
2680 }
2681
7465dd22
PF		 2682 if (link_radv_enabled(link)) {
2683 r = radv_configure(link);
2684 if (r < 0)
2685 return r;
2686 }
2687
8e1ad1ea 2688 if (link_lldp_rx_enabled(link)) {
7f853950 2689 r = link_lldp_rx_configure(link);
273eec24
LP		 2690 if (r < 0)
2691 return r;
ce43e484
SS		 2692 }
2693
f6fcc1c2 2694 r = link_configure_mtu(link);
40288ece
YW		 2695 if (r < 0)
2696 return r;
44b598a1 2697
9f6e82e6
YW		 2698 r = link_configure_addrgen_mode(link);
2699 if (r < 0)
2700 return r;
0e2fdb83 2701
051e77ca
SS		 2702 r = link_configure_ipv4_dad(link);
2703 if (r < 0)
2704 return r;
2705
3a390124
DS		 2706 return link_configure_continue(link);
2707}
2708
2709/* The configuration continues in this separate function, instead of
2710 * including this in the above link_configure() function, for two
2711 * reasons:
2712 * 1) some devices reset the link when the mtu is set, which caused
2713 * an infinite loop here in networkd; see:
2714 * https://github.com/systemd/systemd/issues/6593
2715 * https://github.com/systemd/systemd/issues/9831
2716 * 2) if ipv6ll is disabled, then bringing the interface up must be
2717 * delayed until after we get confirmation from the kernel that
2718 * the addr_gen_mode parameter has been set (via netlink), see:
2719 * https://github.com/systemd/systemd/issues/13882
2720 */
2721static int link_configure_continue(Link *link) {
55dc8c4a
YW		 2722 int r;
2723
2724 assert(link);
2725 assert(link->network);
bd08ce56 2726 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a 2727
9524014e 2728 if (link->setting_mtu || link->setting_genmode)
55dc8c4a
YW		 2729 return 0;
2730
4c649652
DS		 2731 /* Drop foreign config, but ignore loopback or critical devices.
2732 * We do not want to remove loopback address or addresses used for root NFS. */
2733 if (!(link->flags & IFF_LOOPBACK) &&
2734 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
2735 r = link_drop_foreign_config(link);
2736 if (r < 0)
2737 return r;
2738 }
2739
d236718c
DS		 2740 /* The kernel resets ipv6 mtu after changing device mtu;
2741 * we must set this here, after we've set device mtu */
2742 r = link_set_ipv6_mtu(link);
2743 if (r < 0)
2744 return r;
2745
dad2d78e 2746 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2747 r = link_acquire_conf(link);
2748 if (r < 0)
2749 return r;
cc544d5f 2750 }
1e9be60b 2751
3f265037 2752 return link_enter_join_netdev(link);
505f8da7
TG		 2753}
2754
27dfc982
YW		 2755static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2756 assert(duid);
2757
2758 if (duid->raw_data_len > 0)
2759 return 0;
2760
2761 if (duid->type != DUID_TYPE_UUID)
2762 return -EINVAL;
2763
2764 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2765 duid->raw_data_len = sizeof(sd_id128_t);
2766
2767 return 1;
2768}
2769
2770int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2771 Manager *manager = userdata;
2772 const sd_bus_error *e;
2773 const void *a;
2774 size_t sz;
2775 DUID *duid;
2776 Link *link;
2777 int r;
2778
2779 assert(m);
2780 assert(manager);
2781
2782 e = sd_bus_message_get_error(m);
2783 if (e) {
2784 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 2785 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 2786 e->message);
2787 goto configure;
2788 }
2789
2790 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2791 if (r < 0)
2792 goto configure;
2793
2794 if (sz != sizeof(sd_id128_t)) {
ab4dd984 2795 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 2796 goto configure;
2797 }
2798
2799 memcpy(&manager->product_uuid, a, sz);
2800 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2801 (void) duid_set_uuid(duid, manager->product_uuid);
2802
2803 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2804
2805configure:
2806 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3dc2e7af
YW		 2807 link_unref(link);
2808
27dfc982
YW		 2809 r = link_configure(link);
2810 if (r < 0)
4ff296b0 2811 link_enter_failed(link);
27dfc982
YW		 2812 }
2813
2814 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
2815
2816 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2817 * even if the method fails. */
2818 manager->has_product_uuid = true;
2819
2820 return 1;
2821}
2822
2823static bool link_requires_uuid(Link *link) {
2824 const DUID *duid;
2825
2826 assert(link);
2827 assert(link->manager);
2828 assert(link->network);
2829
2830 duid = link_get_duid(link);
2831 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
2832 return false;
2833
2834 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
2835 return true;
2836
2837 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
2838 return true;
2839
2840 return false;
2841}
2842
2843static int link_configure_duid(Link *link) {
2844 Manager *m;
2845 DUID *duid;
2846 int r;
2847
2848 assert(link);
2849 assert(link->manager);
2850 assert(link->network);
2851
2852 m = link->manager;
2853 duid = link_get_duid(link);
2854
2855 if (!link_requires_uuid(link))
2856 return 1;
2857
2858 if (m->has_product_uuid) {
2859 (void) duid_set_uuid(duid, m->product_uuid);
2860 return 1;
2861 }
2862
2863 if (!m->links_requesting_uuid) {
2864 r = manager_request_product_uuid(m, link);
2865 if (r < 0) {
2866 if (r == -ENOMEM)
2867 return r;
2868
ab4dd984
ZJS		 2869 log_link_warning_errno(link, r,
2870 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 2871 return 1;
2872 }
2873 } else {
2874 r = set_put(m->links_requesting_uuid, link);
2875 if (r < 0)
2876 return log_oom();
39dbd0c7
ZJS		 2877 if (r > 0)
2878 link_ref(link);
27dfc982
YW		 2879
2880 r = set_put(m->duids_requesting_uuid, duid);
2881 if (r < 0)
2882 return log_oom();
2883 }
2884
2885 return 0;
2886}
2887
572b21d9 2888static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
ad932b15
YW		 2889 Network *network;
2890 int r;
2891
572b21d9
YW		 2892 if (m) {
2893 _cleanup_strv_free_ char **s = NULL;
2894
2895 r = sd_netlink_message_get_errno(m);
2896 if (r < 0)
2897 return r;
2898
2899 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2900 if (r < 0 && r != -ENODATA)
2901 return r;
2902
2903 strv_free_and_replace(link->alternative_names, s);
2904 }
2905
c643bda5
YW		 2906 r = network_get(link->manager, link->iftype, link->sd_device,
2907 link->ifname, link->alternative_names, link->driver,
2908 &link->mac, &link->permanent_mac,
2909 link->wlan_iftype, link->ssid, &link->bssid, &network);
ad932b15
YW		 2910 if (r == -ENOENT) {
2911 link_enter_unmanaged(link);
2912 return 0;
2913 } else if (r == 0 && network->unmanaged) {
2914 link_enter_unmanaged(link);
2915 return 0;
2916 } else if (r < 0)
2917 return r;
2918
99b8517c 2919 if (link->network == network && !force)
ad932b15
YW		 2920 return 0;
2921
2922 log_link_info(link, "Re-configuring with %s", network->filename);
2923
2924 /* Dropping old .network file */
2925 r = link_stop_clients(link, false);
572b21d9 2926 if (r < 0)
ad932b15 2927 return r;
ad932b15
YW		 2928
2929 if (link_dhcp4_server_enabled(link))
2930 (void) sd_dhcp_server_stop(link->dhcp_server);
2931
2932 r = link_drop_config(link);
2933 if (r < 0)
2934 return r;
2935
2c7b826d 2936 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
ad932b15
YW		 2937 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
2938 r = link_drop_foreign_config(link);
2939 if (r < 0)
2940 return r;
2941 }
2942
2943 link_free_carrier_maps(link);
2944 link_free_engines(link);
2945 link->network = network_unref(link->network);
2946
2947 /* Then, apply new .network file */
2948 r = network_apply(network, link);
2949 if (r < 0)
2950 return r;
2951
2952 r = link_new_carrier_maps(link);
2953 if (r < 0)
2954 return r;
2955
2956 link_set_state(link, LINK_STATE_INITIALIZED);
8ae7b8a1 2957 link_dirty(link);
ad932b15
YW		 2958
2959 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2960 * link_configure() is called later asynchronously. */
2961 r = link_configure_duid(link);
2962 if (r <= 0)
2963 return r;
2964
2965 r = link_configure(link);
2966 if (r < 0)
2967 return r;
2968
2969 return 0;
2970}
2971
572b21d9
YW		 2972static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2973 int r;
2974
2975 r = link_reconfigure_internal(link, m, false);
2976 if (r < 0)
2977 link_enter_failed(link);
2978
2979 return 1;
2980}
2981
2982static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2983 int r;
2984
2985 r = link_reconfigure_internal(link, m, true);
2986 if (r < 0)
2987 link_enter_failed(link);
2988
2989 return 1;
2990}
2991
2992int link_reconfigure(Link *link, bool force) {
2993 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2994 int r;
2995
2c0d7ed3
YW		 2996 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
2997 return 0;
2998
572b21d9
YW		 2999 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3000 link->ifindex);
3001 if (r < 0)
3002 return r;
3003
3004 r = netlink_call_async(link->manager->rtnl, NULL, req,
3005 force ? link_force_reconfigure_handler : link_reconfigure_handler,
3006 link_netlink_destroy_callback, link);
3007 if (r < 0)
3008 return r;
3009
3010 link_ref(link);
3011
3012 return 0;
3013}
3014
e6bf7774 3015static int link_initialized_and_synced(Link *link) {
505f8da7 3016 Network *network;
505f8da7
TG		 3017 int r;
3018
3019 assert(link);
3020 assert(link->ifname);
3021 assert(link->manager);
3022
bd08ce56
YW		 3023 /* We may get called either from the asynchronous netlink callback,
3024 * or directly for link_add() if running in a container. See link_add(). */
3025 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 3026 return 0;
505f8da7 3027
6a7a4e4d 3028 log_link_debug(link, "Link state is up-to-date");
bd08ce56 3029 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 3030
0d4ad91d
AR		 3031 r = link_new_bound_by_list(link);
3032 if (r < 0)
3033 return r;
3034
3035 r = link_handle_bound_by_list(link);
3036 if (r < 0)
3037 return r;
3038
c4a03a56 3039 if (!link->network) {
0894cfe4 3040 r = wifi_get_info(link);
8d968fdd
YW		 3041 if (r < 0)
3042 return r;
3043
c643bda5
YW		 3044 r = network_get(link->manager, link->iftype, link->sd_device,
3045 link->ifname, link->alternative_names, link->driver,
3046 &link->mac, &link->permanent_mac,
3047 link->wlan_iftype, link->ssid, &link->bssid, &network);
c4a03a56
TG		 3048 if (r == -ENOENT) {
3049 link_enter_unmanaged(link);
4232cf04 3050 return 0;
a09dc546
DM		 3051 } else if (r == 0 && network->unmanaged) {
3052 link_enter_unmanaged(link);
3053 return 0;
c4a03a56
TG		 3054 } else if (r < 0)
3055 return r;
505f8da7 3056
c4a03a56
TG		 3057 if (link->flags & IFF_LOOPBACK) {
3058 if (network->link_local != ADDRESS_FAMILY_NO)
3059 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3060
c4a03a56
TG		 3061 if (network->dhcp != ADDRESS_FAMILY_NO)
3062 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3063
c4a03a56
TG		 3064 if (network->dhcp_server)
3065 log_link_debug(link, "Ignoring DHCP server for loopback link");
3066 }
bd2efe92 3067
7d342c03 3068 r = network_apply(network, link);
c4a03a56
TG		 3069 if (r < 0)
3070 return r;
3071 }
505f8da7 3072
0d4ad91d
AR		 3073 r = link_new_bound_to_list(link);
3074 if (r < 0)
3075 return r;
3076
27dfc982
YW		 3077 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3078 * link_configure() is called later asynchronously. */
3079 r = link_configure_duid(link);
3080 if (r <= 0)
3081 return r;
3082
a748b692
TG		 3083 r = link_configure(link);
3084 if (r < 0)
3085 return r;
3086
4232cf04 3087 return 0;
505f8da7
TG		 3088}
3089
302a796f 3090static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
572b21d9 3091 _cleanup_strv_free_ char **s = NULL;
4ff296b0
YW		 3092 int r;
3093
572b21d9
YW		 3094 r = sd_netlink_message_get_errno(m);
3095 if (r < 0) {
40681e5c 3096 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 3097 link_enter_failed(link);
3098 return 0;
3099 }
3100
3101 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3102 if (r < 0 && r != -ENODATA) {
3103 link_enter_failed(link);
3104 return 0;
3105 }
3106
3107 strv_free_and_replace(link->alternative_names, s);
3108
4ff296b0
YW		 3109 r = link_initialized_and_synced(link);
3110 if (r < 0)
3111 link_enter_failed(link);
e6bf7774
YW		 3112 return 1;
3113}
3114
51517f9e 3115int link_initialized(Link *link, sd_device *device) {
4afd3348 3116 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3117 int r;
3118
3119 assert(link);
3120 assert(link->manager);
3121 assert(link->manager->rtnl);
3122 assert(device);
3123
8434fd5c 3124 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3125 return 0;
3126
51517f9e 3127 if (link->sd_device)
679b3605
TG		 3128 return 0;
3129
79008bdd 3130 log_link_debug(link, "udev initialized link");
bd08ce56 3131 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 3132
51517f9e 3133 link->sd_device = sd_device_ref(device);
4f561e8e 3134
3c9b8860
TG		 3135 /* udev has initialized the link, but we don't know if we have yet
3136 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3137 * when it returns we know that the pending NEWLINKs have already been
3138 * processed and that we are up-to-date */
4f561e8e 3139
3c9b8860
TG		 3140 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3141 link->ifindex);
4f561e8e
TG		 3142 if (r < 0)
3143 return r;
3144
302a796f
YW		 3145 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3146 link_netlink_destroy_callback, link);
4f561e8e
TG		 3147 if (r < 0)
3148 return r;
3149
5da8149f
TG		 3150 link_ref(link);
3151
4f561e8e
TG		 3152 return 0;
3153}
3154
c4a03a56 3155static int link_load(Link *link) {
0bc70f1d
TG		 3156 _cleanup_free_ char *network_file = NULL,
3157 *addresses = NULL,
f703cc2c 3158 *routes = NULL,
0bc70f1d
TG		 3159 *dhcp4_address = NULL,
3160 *ipv4ll_address = NULL;
3161 union in_addr_union address;
c4a03a56
TG		 3162 int r;
3163
3164 assert(link);
3165
aa8fbc74 3166 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3167 "NETWORK_FILE", &network_file,
3168 "ADDRESSES", &addresses,
f703cc2c 3169 "ROUTES", &routes,
0bc70f1d 3170 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3171 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3172 if (r < 0 && r != -ENOENT)
3173 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3174
3175 if (network_file) {
3176 Network *network;
3177 char *suffix;
3178
3179 /* drop suffix */
3180 suffix = strrchr(network_file, '.');
3181 if (!suffix) {
3182 log_link_debug(link, "Failed to get network name from %s", network_file);
3183 goto network_file_fail;
3184 }
3185 *suffix = '\0';
3186
3187 r = network_get_by_name(link->manager, basename(network_file), &network);
3188 if (r < 0) {
3189 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3190 goto network_file_fail;
3191 }
3192
7d342c03 3193 r = network_apply(network, link);
c4a03a56
TG		 3194 if (r < 0)
3195 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3196 }
3197
3198network_file_fail:
3199
1f68f772
ZJS		 3200 for (const char *p = addresses; p; ) {
3201 _cleanup_free_ char *address_str = NULL;
3202 char *prefixlen_str;
3203 int family;
3204 unsigned char prefixlen;
c4a03a56 3205
1f68f772
ZJS		 3206 r = extract_first_word(&p, &address_str, NULL, 0);
3207 if (r < 0)
3208 log_link_warning_errno(link, r, "failed to parse ADDRESSES: %m");
3209 if (r <= 0)
3210 break;
c4a03a56 3211
1f68f772
ZJS		 3212 prefixlen_str = strchr(address_str, '/');
3213 if (!prefixlen_str) {
3214 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
3215 continue;
3216 }
3217 *prefixlen_str++ = '\0';
c4a03a56 3218
1f68f772
ZJS		 3219 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3220 if (r != 1) {
3221 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3222 continue;
3223 }
c4a03a56 3224
1f68f772
ZJS		 3225 r = in_addr_from_string_auto(address_str, &family, &address);
3226 if (r < 0) {
3227 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
3228 continue;
c4a03a56 3229 }
c4a03a56 3230
1f68f772
ZJS		 3231 r = address_add(link, family, &address, prefixlen, NULL);
3232 if (r < 0)
3233 return log_link_error_errno(link, r, "Failed to add address: %m");
3234 }
74544b4e 3235
731ff05b
YW		 3236 r = link_deserialize_routes(link, routes);
3237 if (r < 0)
3238 log_link_warning_errno(link, r, "Failed to load routes from %s, ignoring: %m", link->state_file);
f703cc2c 3239
0bc70f1d
TG		 3240 if (dhcp4_address) {
3241 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3242 if (r < 0) {
b68d26b8 3243 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3244 goto dhcp4_address_fail;
3245 }
3246
b1c626f6 3247 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3248 if (r < 0)
b68d26b8 3249 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d 3250
1b43e246
DS		 3251 r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0);
3252 if (r < 0)
3253 return log_link_error_errno(link, r, "Failed to attach DHCPv4 event: %m");
3254
0bc70f1d
TG		 3255 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3256 if (r < 0)
b68d26b8 3257 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3258 }
3259
3260dhcp4_address_fail:
3261
3262 if (ipv4ll_address) {
3263 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3264 if (r < 0) {
b68d26b8 3265 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3266 goto ipv4ll_address_fail;
3267 }
3268
3269 r = sd_ipv4ll_new(&link->ipv4ll);
3270 if (r < 0)
b68d26b8 3271 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d 3272
1b43e246
DS		 3273 r = sd_ipv4ll_attach_event(link->ipv4ll, NULL, 0);
3274 if (r < 0)
3275 return log_link_error_errno(link, r, "Failed to attach IPv4LL event: %m");
3276
0bc70f1d
TG		 3277 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3278 if (r < 0)
b68d26b8 3279 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3280 }
3281
3282ipv4ll_address_fail:
3283
c4a03a56
TG		 3284 return 0;
3285}
3286
1c4baffc 3287int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3288 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3289 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3290 Link *link;
5a937ea2 3291 int r;
505f8da7
TG		 3292
3293 assert(m);
fbbeb65a 3294 assert(m->rtnl);
505f8da7
TG		 3295 assert(message);
3296 assert(ret);
3297
3298 r = link_new(m, message, ret);
3299 if (r < 0)
3300 return r;
3301
3302 link = *ret;
3303
6a7a4e4d 3304 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3305
c4a03a56
TG		 3306 r = link_load(link);
3307 if (r < 0)
3308 return r;
3309
bf331d87
YW		 3310 if (path_is_read_only_fs("/sys") <= 0) {
3311 /* udev should be around */
ae06ab10 3312 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3313 r = sd_device_new_from_device_id(&device, ifindex_str);
3314 if (r < 0) {
4d59e14f
YW		 3315 log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m");
3316 return 0;
5c416fc4 3317 }
505f8da7 3318
5a937ea2 3319 r = sd_device_get_is_initialized(device);
51517f9e 3320 if (r < 0) {
bf331d87 3321 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 3322 goto failed;
3323 }
5a937ea2 3324 if (r == 0) {
505f8da7 3325 /* not yet ready */
79008bdd 3326 log_link_debug(link, "link pending udev initialization...");
505f8da7 3327 return 0;
3c4cb064 3328 }
505f8da7 3329
299ad32d
YW		 3330 r = device_is_renaming(device);
3331 if (r < 0) {
bf331d87 3332 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 3333 goto failed;
3334 }
3335 if (r > 0) {
bf331d87 3336 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 3337 return 0;
3338 }
3339
4f561e8e
TG		 3340 r = link_initialized(link, device);
3341 if (r < 0)
5c416fc4 3342 goto failed;
4f561e8e 3343 } else {
e6bf7774 3344 r = link_initialized_and_synced(link);
4f561e8e 3345 if (r < 0)
5c416fc4 3346 goto failed;
4f561e8e 3347 }
505f8da7 3348
a748b692 3349 return 0;
5c416fc4
TG		 3350failed:
3351 link_enter_failed(link);
3352 return r;
a748b692
TG		 3353}
3354
c601ebf7 3355int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3356 int r;
3357
3358 assert(link);
3359
3360 log_link_info(link, "Gained IPv6LL");
3361
c601ebf7 3362 link->ipv6ll_address = *address;
e7ab854c
TG		 3363 link_check_ready(link);
3364
b9ea3d2e 3365 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3366 r = link_acquire_ipv6_conf(link);
3367 if (r < 0) {
3368 link_enter_failed(link);
3369 return r;
3370 }
3371 }
3372
3373 return 0;
3374}
3375
9c0a72f9
TG		 3376static int link_carrier_gained(Link *link) {
3377 int r;
3378
3379 assert(link);
3380
0894cfe4 3381 r = wifi_get_info(link);
8d968fdd
YW		 3382 if (r < 0)
3383 return r;
3384 if (r > 0) {
572b21d9
YW		 3385 r = link_reconfigure_internal(link, NULL, false);
3386 if (r < 0) {
3387 link_enter_failed(link);
8d968fdd 3388 return r;
572b21d9 3389 }
8d968fdd
YW		 3390 }
3391
b9ea3d2e 3392 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3393 r = link_acquire_conf(link);
3394 if (r < 0) {
3395 link_enter_failed(link);
3396 return r;
3397 }
6fc25497 3398
b425c3ae 3399 link_set_state(link, LINK_STATE_CONFIGURING);
682c65b0 3400 r = link_set_static_configs(link);
6fc25497
SS		 3401 if (r < 0)
3402 return r;
9c0a72f9
TG		 3403 }
3404
0d4ad91d
AR		 3405 r = link_handle_bound_by_list(link);
3406 if (r < 0)
3407 return r;
3408
1f241589
YW		 3409 if (!link->bridge_mdb_configured) {
3410 r = link_set_bridge_mdb(link);
3411 if (r < 0)
3412 return r;
3413 }
3414
3415 if (streq_ptr(link->kind, "bridge")) {
3416 Link *slave;
3417
3418 SET_FOREACH(slave, link->slaves) {
3419 if (slave->bridge_mdb_configured)
3420 continue;
3421
3422 r = link_set_bridge_mdb(slave);
3423 if (r < 0)
3424 link_enter_failed(slave);
3425 }
3426 }
3db468ea 3427
9c0a72f9
TG		 3428 return 0;
3429}
3430
3431static int link_carrier_lost(Link *link) {
3432 int r;
3433
3434 assert(link);
3435
25e992ba 3436 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3437 return 0;
3438
fbdb6605 3439 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3440 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3441 * configuration and stop the clients as well. */
97e7fb39
SS		 3442 if (link->setting_mtu)
3443 return 0;
3444
95355a28 3445 r = link_stop_clients(link, false);
9c0a72f9
TG		 3446 if (r < 0) {
3447 link_enter_failed(link);
3448 return r;
3449 }
3450
28464ae0
SS		 3451 if (link_dhcp4_server_enabled(link))
3452 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3453
3104883d
SS		 3454 r = link_drop_config(link);
3455 if (r < 0)
3456 return r;
3457
2c7b826d 3458 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
f258e948 3459 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3460 r = link_drop_foreign_config(link);
3461 if (r < 0)
3462 return r;
3463 }
3104883d 3464
0d4ad91d
AR		 3465 r = link_handle_bound_by_list(link);
3466 if (r < 0)
3467 return r;
3468
9c0a72f9
TG		 3469 return 0;
3470}
3471
3472int link_carrier_reset(Link *link) {
3473 int r;
3474
3475 assert(link);
3476
3477 if (link_has_carrier(link)) {
3478 r = link_carrier_lost(link);
3479 if (r < 0)
3480 return r;
3481
3482 r = link_carrier_gained(link);
3483 if (r < 0)
3484 return r;
3485
6a7a4e4d 3486 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3487 }
3488
3489 return 0;
3490}
3491
d236718c
DS		 3492/* This is called every time an interface admin state changes to up;
3493 * specifically, when IFF_UP flag changes from unset to set */
3494static int link_admin_state_up(Link *link) {
3495 int r;
3496
3497 /* We set the ipv6 mtu after the device mtu, but the kernel resets
3498 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
3499 * ipv6_mtu_set prevents this from trying to set it too early before
3500 * the link->network has been setup; we only need to reset it
3501 * here if we've already set it during normal initialization. */
3502 if (link->ipv6_mtu_set) {
3503 r = link_set_ipv6_mtu(link);
3504 if (r < 0)
3505 return r;
3506 }
3507
3508 return 0;
3509}
3510
1c4baffc 3511int link_update(Link *link, sd_netlink_message *m) {
572b21d9 3512 _cleanup_strv_free_ char **s = NULL;
c49b33ac 3513 struct ether_addr mac;
ca4e095a 3514 const char *ifname;
afe7fd56 3515 uint32_t mtu;
d236718c 3516 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 3517 int old_master, r;
22936833 3518
dd3efc09 3519 assert(link);
b8941f74 3520 assert(link->ifname);
22936833
TG		 3521 assert(m);
3522
7619683b 3523 if (link->state == LINK_STATE_LINGER) {
5238e957 3524 log_link_info(link, "Link re-added");
289e6774 3525 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3526
3527 r = link_new_carrier_maps(link);
3528 if (r < 0)
3529 return r;
7619683b
TG		 3530 }
3531
1c4baffc 3532 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3533 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3534 Manager *manager = link->manager;
b8941f74 3535
30de2b89 3536 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3537
30de2b89
YW		 3538 link_drop(link);
3539 r = link_add(manager, m, &link);
3540 if (r < 0)
3541 return r;
b8941f74
TG		 3542 }
3543
572b21d9
YW		 3544 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3545 if (r >= 0)
3546 strv_free_and_replace(link->alternative_names, s);
3547
1c4baffc 3548 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3549 if (r >= 0 && mtu > 0) {
3550 link->mtu = mtu;
4e964aa0 3551 if (link->original_mtu == 0) {
afe7fd56 3552 link->original_mtu = mtu;
6a7a4e4d 3553 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3554 }
3555
3556 if (link->dhcp_client) {
3c9b8860
TG		 3557 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3558 link->mtu);
fc95c359
YW		 3559 if (r < 0)
3560 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3561 }
7465dd22
PF		 3562
3563 if (link->radv) {
3564 r = sd_radv_set_mtu(link->radv, link->mtu);
3565 if (r < 0)
3566 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3567 }
9842de0d 3568 }
69629de9 3569
e9189a1f
TG		 3570 /* The kernel may broadcast NEWLINK messages without the MAC address
3571 set, simply ignore them. */
1c4baffc 3572 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
807667f7
YW		 3573 if (r >= 0 && memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN) != 0) {
3574
3575 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN);
3576
3577 log_link_debug(link, "Gained new MAC address: "
3578 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3579 mac.ether_addr_octet[0],
3580 mac.ether_addr_octet[1],
3581 mac.ether_addr_octet[2],
3582 mac.ether_addr_octet[3],
3583 mac.ether_addr_octet[4],
3584 mac.ether_addr_octet[5]);
3585
3586 if (link->ipv4ll) {
3587 bool restart = sd_ipv4ll_is_running(link->ipv4ll) > 0;
3588
3589 if (restart) {
3590 r = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 3591 if (r < 0)
807667f7 3592 return log_link_warning_errno(link, r, "Could not stop IPv4LL client: %m");
c49b33ac 3593 }
c49b33ac 3594
807667f7
YW		 3595 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
3596 if (r < 0)
3597 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
3598
3599 if (restart) {
3600 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d 3601 if (r < 0)
807667f7
YW		 3602 return log_link_warning_errno(link, r, "Could not restart IPv4LL client: %m");
3603 }
3604 }
3605
3606 if (link->dhcp_client) {
3607 r = sd_dhcp_client_set_mac(link->dhcp_client,
3608 (const uint8_t *) &link->mac,
3609 sizeof (link->mac),
3610 ARPHRD_ETHER);
3611 if (r < 0)
3612 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
3613
3614 r = dhcp4_set_client_identifier(link);
3615 if (r < 0)
3616 return log_link_warning_errno(link, r, "Could not set DHCP client identifier: %m");
3617 }
413708d1 3618
807667f7
YW		 3619 if (link->dhcp6_client) {
3620 const DUID* duid = link_get_duid(link);
3621 bool restart = sd_dhcp6_client_is_running(link->dhcp6_client) > 0;
3622
3623 if (restart) {
3624 r = sd_dhcp6_client_stop(link->dhcp6_client);
fff1f40c 3625 if (r < 0)
807667f7 3626 return log_link_warning_errno(link, r, "Could not stop DHCPv6 client: %m");
c49b33ac 3627 }
4138fb2c 3628
807667f7
YW		 3629 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
3630 (const uint8_t *) &link->mac,
3631 sizeof (link->mac),
3632 ARPHRD_ETHER);
3633 if (r < 0)
3634 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
8341a5c3 3635
807667f7
YW		 3636 if (link->network->iaid_set) {
3637 r = sd_dhcp6_client_set_iaid(link->dhcp6_client, link->network->iaid);
6a7a4e4d 3638 if (r < 0)
807667f7
YW		 3639 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3640 }
3641
3642 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3643 duid->type,
3644 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3645 duid->raw_data_len);
3646 if (r < 0)
3647 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
3648
3649 if (restart) {
3650 r = sd_dhcp6_client_start(link->dhcp6_client);
413708d1 3651 if (r < 0)
807667f7 3652 return log_link_warning_errno(link, r, "Could not restart DHCPv6 client: %m");
4138fb2c 3653 }
807667f7 3654 }
7465dd22 3655
807667f7
YW		 3656 if (link->radv) {
3657 bool restart = sd_radv_is_running(link->radv);
3658
3659 if (restart) {
3660 r = sd_radv_stop(link->radv);
7465dd22 3661 if (r < 0)
807667f7 3662 return log_link_warning_errno(link, r, "Could not stop Router Advertisement: %m");
7465dd22 3663 }
420d2058 3664
807667f7
YW		 3665 r = sd_radv_set_mac(link->radv, &link->mac);
3666 if (r < 0)
3667 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3668
3669 if (restart) {
3670 r = sd_radv_start(link->radv);
420d2058 3671 if (r < 0)
807667f7 3672 return log_link_warning_errno(link, r, "Could not restart Router Advertisement: %m");
420d2058 3673 }
c49b33ac 3674 }
807667f7
YW		 3675
3676 if (link->ndisc) {
3677 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3678 if (r < 0)
3679 return log_link_warning_errno(link, r, "Could not update MAC for NDisc: %m");
3680 }
4f882b2a
TG		 3681 }
3682
bb262ef0
YW		 3683 old_master = link->master_ifindex;
3684 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
3685
d236718c 3686 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 3687 had_carrier = link_has_carrier(link);
3688
bb262ef0 3689 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 3690 if (r < 0)
3691 return r;
3692
d236718c
DS		 3693 if (!link_was_admin_up && (link->flags & IFF_UP)) {
3694 log_link_info(link, "Link UP");
3695
3696 r = link_admin_state_up(link);
3697 if (r < 0)
3698 return r;
3699 } else if (link_was_admin_up && !(link->flags & IFF_UP))
3700 log_link_info(link, "Link DOWN");
3701
273eec24
LP		 3702 r = link_update_lldp(link);
3703 if (r < 0)
3704 return r;
3705
a61bb41c
TG		 3706 carrier_gained = !had_carrier && link_has_carrier(link);
3707 carrier_lost = had_carrier && !link_has_carrier(link);
3708
3709 if (carrier_gained) {
6a7a4e4d 3710 log_link_info(link, "Gained carrier");
a61bb41c 3711
9c0a72f9
TG		 3712 r = link_carrier_gained(link);
3713 if (r < 0)
3714 return r;
a61bb41c 3715 } else if (carrier_lost) {
6a7a4e4d 3716 log_link_info(link, "Lost carrier");
a61bb41c 3717
9c0a72f9
TG		 3718 r = link_carrier_lost(link);
3719 if (r < 0)
a61bb41c 3720 return r;
a61bb41c
TG		 3721 }
3722
3723 return 0;
dd3efc09 3724}
fe8db0c5 3725
b295beea
LP		 3726static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3727 bool space = false;
b295beea
LP		 3728 Link *link;
3729
3730 assert(f);
3731 assert(prefix);
3732
3733 if (hashmap_isempty(h))
3734 return;
3735
0d536673 3736 fputs(prefix, f);
90e74a66 3737 HASHMAP_FOREACH(link, h) {
b295beea 3738 if (space)
0d536673 3739 fputc(' ', f);
b295beea
LP		 3740
3741 fprintf(f, "%i", link->ifindex);
3742 space = true;
3743 }
3744
0d536673 3745 fputc('\n', f);
b295beea
LP		 3746}
3747
64581765 3748static void link_save_dns(Link *link, FILE *f, struct in_addr_full **dns, unsigned n_dns, bool *space) {
dddc8d1e 3749 for (unsigned j = 0; j < n_dns; j++) {
e77bd3fd 3750 const char *str;
15761549 3751
64581765
YW		 3752 if (dns[j]->ifindex != 0 && dns[j]->ifindex != link->ifindex)
3753 continue;
3754
e77bd3fd
YW		 3755 str = in_addr_full_to_string(dns[j]);
3756 if (!str)
15761549 3757 continue;
15761549
YW		 3758
3759 if (*space)
3760 fputc(' ', f);
e77bd3fd 3761 fputs(str, f);
15761549
YW		 3762 *space = true;
3763 }
3764}
3765
d5e172d2
ZJS		 3766static void serialize_addresses(
3767 FILE *f,
3768 const char *lvalue,
3769 bool *space,
3770 char **addresses,
3771 sd_dhcp_lease *lease,
3772 bool conditional,
ddb82ec2 3773 sd_dhcp_lease_server_type what,
d5e172d2
ZJS		 3774 sd_dhcp6_lease *lease6,
3775 bool conditional6,
3776 int (*lease6_get_addr)(sd_dhcp6_lease*, const struct in6_addr**),
3777 int (*lease6_get_fqdn)(sd_dhcp6_lease*, char ***)) {
3778 int r;
3779
3780 bool _space = false;
3781 if (!space)
3782 space = &_space;
3783
3784 if (lvalue)
3785 fprintf(f, "%s=", lvalue);
3786 fputstrv(f, addresses, NULL, space);
3787
3788 if (lease && conditional) {
3789 const struct in_addr *lease_addresses;
3790
3791 r = sd_dhcp_lease_get_servers(lease, what, &lease_addresses);
3792 if (r > 0)
d8bff5cc 3793 serialize_in_addrs(f, lease_addresses, r, space, in4_addr_is_non_local);
d5e172d2
ZJS		 3794 }
3795
3796 if (lease6 && conditional6 && lease6_get_addr) {
3797 const struct in6_addr *in6_addrs;
3798
3799 r = lease6_get_addr(lease6, &in6_addrs);
d8bff5cc
ZJS		 3800 if (r > 0)
3801 serialize_in6_addrs(f, in6_addrs, r, space);
d5e172d2
ZJS		 3802 }
3803
3804 if (lease6 && conditional6 && lease6_get_fqdn) {
3805 char **in6_hosts;
3806
3807 r = lease6_get_fqdn(lease6, &in6_hosts);
3808 if (r > 0)
3809 fputstrv(f, in6_hosts, NULL, space);
3810 }
3811
3812 if (lvalue)
3813 fputc('\n', f);
3814}
3815
fe8db0c5 3816int link_save(Link *link) {
d361b373 3817 const char *admin_state, *oper_state, *carrier_state, *address_state;
68a8723c 3818 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3819 _cleanup_fclose_ FILE *f = NULL;
18d8a2cf 3820 Address *a;
fe8db0c5
TG		 3821 int r;
3822
3823 assert(link);
3824 assert(link->state_file);
68a8723c 3825 assert(link->lease_file);
bbf7c048
TG		 3826 assert(link->manager);
3827
370e9930 3828 if (link->state == LINK_STATE_LINGER) {
6990fb6b 3829 (void) unlink(link->state_file);
370e9930
TG		 3830 return 0;
3831 }
3832
34437b4f
LP		 3833 link_lldp_save(link);
3834
deb2e523
TG		 3835 admin_state = link_state_to_string(link->state);
3836 assert(admin_state);
3837
e375dcde
TG		 3838 oper_state = link_operstate_to_string(link->operstate);
3839 assert(oper_state);
deb2e523 3840
ac999bf0
YW		 3841 carrier_state = link_carrier_state_to_string(link->carrier_state);
3842 assert(carrier_state);
3843
3844 address_state = link_address_state_to_string(link->address_state);
3845 assert(address_state);
3846
fe8db0c5
TG		 3847 r = fopen_temporary(link->state_file, &f, &temp_path);
3848 if (r < 0)
6a7a4e4d 3849 goto fail;
fe8db0c5 3850
5512a963 3851 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3852
3853 fprintf(f,
3854 "# This is private data. Do not parse.\n"
deb2e523 3855 "ADMIN_STATE=%s\n"
ac999bf0
YW		 3856 "OPER_STATE=%s\n"
3857 "CARRIER_STATE=%s\n"
3858 "ADDRESS_STATE=%s\n",
3859 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 3860
bcb7a07e 3861 if (link->network) {
fe0e16db
YW		 3862 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
3863 const char *dhcp_domainname = NULL, *p;
fe0e16db 3864 bool space;
07bdc70d 3865
c1a38904
MTL		 3866 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3867 yes_no(link->network->required_for_online));
3868
d5e172d2
ZJS		 3869 LinkOperationalStateRange st = link->network->required_operstate_for_online;
3870 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s%s%s\n",
3871 strempty(link_operstate_to_string(st.min)),
3872 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? ":" : "",
3873 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? strempty(link_operstate_to_string(st.max)) : "");
4ac77d63 3874
adc5b2e2
TG		 3875 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3876
d5e172d2
ZJS		 3877 /************************************************************/
3878
0d536673 3879 fputs("DNS=", f);
ea352b40 3880 space = false;
15761549 3881 if (link->n_dns != (unsigned) -1)
64581765 3882 link_save_dns(link, f, link->dns, link->n_dns, &space);
15761549 3883 else
64581765 3884 link_save_dns(link, f, link->network->dns, link->network->n_dns, &space);
d5314fff 3885
d5e172d2
ZJS		 3886 serialize_addresses(f, NULL, &space,
3887 NULL,
3888 link->dhcp_lease,
3889 link->network->dhcp_use_dns,
ddb82ec2 3890 SD_DHCP_LEASE_DNS,
1633c457 3891 link->dhcp6_lease,
d5e172d2
ZJS		 3892 link->network->dhcp6_use_dns,
3893 sd_dhcp6_lease_get_dns,
3894 NULL);
1e7a0e21 3895
a8c10331 3896 /* Make sure to flush out old entries before we use the NDisc data */
1e7a0e21
LP		 3897 ndisc_vacuum(link);
3898
b296797f 3899 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3900 NDiscRDNSS *dd;
3901
90e74a66 3902 SET_FOREACH(dd, link->ndisc_rdnss)
d8bff5cc 3903 serialize_in6_addrs(f, &dd->address, 1, &space);
299d578f
SS		 3904 }
3905
3906 fputc('\n', f);
3907
d5e172d2
ZJS		 3908 /************************************************************/
3909
3910 serialize_addresses(f, "NTP", NULL,
3911 link->ntp ?: link->network->ntp,
3912 link->dhcp_lease,
3913 link->network->dhcp_use_ntp,
ddb82ec2 3914 SD_DHCP_LEASE_NTP,
1633c457 3915 link->dhcp6_lease,
d5e172d2
ZJS		 3916 link->network->dhcp6_use_ntp,
3917 sd_dhcp6_lease_get_ntp_addrs,
3918 sd_dhcp6_lease_get_ntp_fqdn);
3919
3920 serialize_addresses(f, "SIP", NULL,
2a71d57f 3921 NULL,
d5e172d2
ZJS		 3922 link->dhcp_lease,
3923 link->network->dhcp_use_sip,
ddb82ec2 3924 SD_DHCP_LEASE_SIP,
2a71d57f 3925 NULL, false, NULL, NULL);
d5e172d2
ZJS		 3926
3927 /************************************************************/
bd8f6538 3928
b2a81c0b 3929 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3930 if (link->dhcp_lease) {
b2a81c0b 3931 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3932 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3933 }
1633c457
YW		 3934 if (link->dhcp6_lease)
3935 (void) sd_dhcp6_lease_get_domains(link->dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3936 }
3937
fe0e16db
YW		 3938 fputs("DOMAINS=", f);
3939 space = false;
90e74a66 3940 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains)
fe0e16db 3941 fputs_with_space(f, p, NULL, &space);
07bdc70d 3942
1e7a0e21 3943 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP		 3944 if (dhcp_domainname)
3945 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3946 if (dhcp_domains)
3947 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3948 if (dhcp6_domains)
3949 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 3950 }
3951
3952 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
3953 NDiscDNSSL *dd;
1e7a0e21 3954
90e74a66 3955 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 3956 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3957 }
b2a81c0b 3958
0d536673 3959 fputc('\n', f);
6192b846 3960
d5e172d2
ZJS		 3961 /************************************************************/
3962
fe0e16db
YW		 3963 fputs("ROUTE_DOMAINS=", f);
3964 space = false;
90e74a66 3965 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains)
fe0e16db 3966 fputs_with_space(f, p, NULL, &space);
b2a81c0b 3967
1e7a0e21 3968 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
1e7a0e21
LP		 3969 if (dhcp_domainname)
3970 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3971 if (dhcp_domains)
3972 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3973 if (dhcp6_domains)
3974 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 3975 }
3976
3977 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3978 NDiscDNSSL *dd;
1e7a0e21 3979
90e74a66 3980 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 3981 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3982 }
b2a81c0b 3983
0d536673 3984 fputc('\n', f);
67272d15 3985
d5e172d2
ZJS		 3986 /************************************************************/
3987
3c9b8860 3988 fprintf(f, "LLMNR=%s\n",
15761549 3989 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
d5e172d2
ZJS		 3990
3991 /************************************************************/
3992
aaa297d4 3993 fprintf(f, "MDNS=%s\n",
15761549 3994 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
15761549 3995
d5e172d2
ZJS		 3996 /************************************************************/
3997
3998 int dns_default_route =
3999 link->dns_default_route >= 0 ? link->dns_default_route :
4000 link->network->dns_default_route;
4001 if (dns_default_route >= 0)
4002 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(dns_default_route));
4003
4004 /************************************************************/
4005
4006 DnsOverTlsMode dns_over_tls_mode =
4007 link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID ? link->dns_over_tls_mode :
4008 link->network->dns_over_tls_mode;
4009 if (dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
4010 fprintf(f, "DNS_OVER_TLS=%s\n", dns_over_tls_mode_to_string(dns_over_tls_mode));
4011
4012 /************************************************************/
4013
4014 DnssecMode dnssec_mode =
4015 link->dnssec_mode != _DNSSEC_MODE_INVALID ? link->dnssec_mode :
4016 link->network->dnssec_mode;
4017 if (dnssec_mode != _DNSSEC_MODE_INVALID)
4018 fprintf(f, "DNSSEC=%s\n", dnssec_mode_to_string(dnssec_mode));
4019
4020 /************************************************************/
4021
4022 Set *nta_anchors = link->dnssec_negative_trust_anchors;
4023 if (set_isempty(nta_anchors))
4024 nta_anchors = link->network->dnssec_negative_trust_anchors;
4025
4026 if (!set_isempty(nta_anchors)) {
8a516214
LP		 4027 const char *n;
4028
0d536673 4029 fputs("DNSSEC_NTA=", f);
8a516214 4030 space = false;
90e74a66 4031 SET_FOREACH(n, nta_anchors)
d390f8ef 4032 fputs_with_space(f, n, NULL, &space);
0d536673 4033 fputc('\n', f);
8a516214
LP		 4034 }
4035
d5e172d2
ZJS		 4036 /************************************************************/
4037
0d536673 4038 fputs("ADDRESSES=", f);
e7780c8d 4039 space = false;
90e74a66 4040 SET_FOREACH(a, link->addresses) {
e7780c8d
TG		 4041 _cleanup_free_ char *address_str = NULL;
4042
4043 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
4044 if (r < 0)
4045 goto fail;
4046
e7780c8d
TG		 4047 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
4048 space = true;
4049 }
0d536673 4050 fputc('\n', f);
c1eb9872 4051
d5e172d2
ZJS		 4052 /************************************************************/
4053
56519412
YW		 4054 r = link_serialize_routes(link, f);
4055 if (r < 0)
4056 goto fail;
bcb7a07e 4057 }
7374f9d8 4058
b295beea
LP		 4059 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
4060 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 4061
8eb9058d 4062 if (link->dhcp_lease) {
bd91b83e 4063 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 4064 if (r < 0)
c2d6bd61 4065 goto fail;
fe8db0c5 4066
7374f9d8 4067 fprintf(f,
b0e39c82
TG		 4068 "DHCP_LEASE=%s\n",
4069 link->lease_file);
deb2e523 4070 } else
6990fb6b 4071 (void) unlink(link->lease_file);
fe8db0c5 4072
0bc70f1d
TG		 4073 if (link->ipv4ll) {
4074 struct in_addr address;
4075
4076 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
4077 if (r >= 0) {
0d536673 4078 fputs("IPV4LL_ADDRESS=", f);
072320ea 4079 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 4080 fputc('\n', f);
0bc70f1d
TG		 4081 }
4082 }
4083
7e738e7b
SS		 4084 if (link->dhcp6_client) {
4085 _cleanup_free_ char *duid = NULL;
4086 uint32_t iaid;
4087
4088 r = sd_dhcp6_client_get_iaid(link->dhcp6_client, &iaid);
4089 if (r >= 0)
4090 fprintf(f, "DHCP6_CLIENT_IAID=0x%x\n", iaid);
4091
4092 r = sd_dhcp6_client_duid_as_string(link->dhcp6_client, &duid);
4093 if (r >= 0)
4094 fprintf(f, "DHCP6_CLIENT_DUID=%s\n", duid);
4095 }
18d8a2cf 4096
c2d6bd61
LP		 4097 r = fflush_and_check(f);
4098 if (r < 0)
4099 goto fail;
fe8db0c5 4100
c2d6bd61 4101 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 4102 r = -errno;
c2d6bd61 4103 goto fail;
fe8db0c5
TG		 4104 }
4105
c2d6bd61 4106 return 0;
dacd6cee 4107
c2d6bd61 4108fail:
6a7a4e4d 4109 (void) unlink(link->state_file);
6a7a4e4d
LP		 4110 if (temp_path)
4111 (void) unlink(temp_path);
4112
dacd6cee 4113 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 4114}
4115
84de38c5
TG		 4116/* The serialized state in /run is no longer up-to-date. */
4117void link_dirty(Link *link) {
4118 int r;
4119
4120 assert(link);
4121
0c241a37
SS		 4122 /* mark manager dirty as link is dirty */
4123 manager_dirty(link->manager);
4124
de7fef4b 4125 r = set_ensure_put(&link->manager->dirty_links, NULL, link);
0c241a37 4126 if (r <= 0)
de7fef4b 4127 /* Ignore allocation errors and don't take another ref if the link was already dirty */
84de38c5 4128 return;
84de38c5
TG		 4129 link_ref(link);
4130}
4131
4132/* The serialized state in /run is up-to-date */
4133void link_clean(Link *link) {
4134 assert(link);
4135 assert(link->manager);
4136
1046bf9b 4137 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4138}
4139
c2a65950
YW		 4140int link_save_and_clean(Link *link) {
4141 int r;
4142
4143 r = link_save(link);
4144 if (r < 0)
4145 return r;
4146
4147 link_clean(link);
4148 return 0;
4149}
4150
fe8db0c5 4151static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4152 [LINK_STATE_PENDING] = "pending",
bd08ce56 4153 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 4154 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 4155 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4156 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4157 [LINK_STATE_FAILED] = "failed",
370e9930 4158 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4159};
4160
4161DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
5ecb131d
YW		 4162
4163int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg) {
4164 const char *err_msg = NULL;
4165
4166 (void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg);
d157714b
YW		 4167 return log_link_full_errno(link, level, err,
4168 "%s: %s%s%s%m",
4169 msg,
4170 strempty(err_msg),
4171 err_msg && !endswith(err_msg, ".") ? "." : "",
4172 err_msg ? " " : "");
5ecb131d 4173}
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