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network: move link_configure_ipv4_dad()
[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
f8f2f880 166bool link_ipv6ll_enabled(Link *link) {
b9d74c40
LP		 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
0917a271
DS		 2323static int link_enumerate_ipv6_tentative_addresses(Link *link) {
2324 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
2325 sd_netlink_message *addr;
2326 int r;
2327
2328 assert(link);
2329 assert(link->manager);
2330 assert(link->manager->rtnl);
2331
2332 r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_GETADDR, 0, AF_INET6);
2333 if (r < 0)
2334 return r;
2335
2336 r = sd_netlink_call(link->manager->rtnl, req, 0, &reply);
2337 if (r < 0)
2338 return r;
2339
2340 for (addr = reply; addr; addr = sd_netlink_message_next(addr)) {
2341 unsigned char flags;
2342 int ifindex;
2343
2344 r = sd_rtnl_message_addr_get_ifindex(addr, &ifindex);
2345 if (r < 0) {
2346 log_link_warning_errno(link, r, "rtnl: invalid ifindex, ignoring: %m");
2347 continue;
2348 } else if (link->ifindex != ifindex)
2349 continue;
2350
2351 r = sd_rtnl_message_addr_get_flags(addr, &flags);
2352 if (r < 0) {
2353 log_link_warning_errno(link, r, "rtnl: received address message with invalid flags, ignoring: %m");
2354 continue;
2355 } else if (!(flags & IFA_F_TENTATIVE))
2356 continue;
2357
2358 log_link_debug(link, "Found tentative ipv6 link-local address");
2359 (void) manager_rtnl_process_address(link->manager->rtnl, addr, link->manager);
2360 }
2361
2362 return 0;
2363}
2364
5e5b137a 2365static int link_drop_foreign_config(Link *link) {
5e5b137a
TG		 2366 int r;
2367
0917a271
DS		 2368 /* The kernel doesn't notify us about tentative addresses;
2369 * so if ipv6ll is disabled, we need to enumerate them now so we can drop them below */
2370 if (!link_ipv6ll_enabled(link)) {
2371 r = link_enumerate_ipv6_tentative_addresses(link);
2372 if (r < 0)
2373 return r;
2374 }
2375
f8f2f880
YW		 2376 r = link_drop_foreign_addresses(link);
2377 if (r < 0)
2378 return r;
5e5b137a 2379
59048336
YW		 2380 r = link_drop_foreign_neighbors(link);
2381 if (r < 0)
2382 return r;
d1bdafd2 2383
779804dd 2384 return link_drop_foreign_routes(link);
5e5b137a
TG		 2385}
2386
3104883d 2387static int link_drop_config(Link *link) {
3104883d
SS		 2388 int r;
2389
d7fbb9f5
YW		 2390 r = link_drop_addresses(link);
2391 if (r < 0)
2392 return r;
3104883d 2393
59048336
YW		 2394 r = link_drop_neighbors(link);
2395 if (r < 0)
2396 return r;
d1bdafd2 2397
62f0ea5f
YW		 2398 r = link_drop_routes(link);
2399 if (r < 0)
2400 return r;
3104883d 2401
c69305ff
LP		 2402 ndisc_flush(link);
2403
3104883d
SS		 2404 return 0;
2405}
2406
34658df2
YW		 2407static int link_configure_traffic_control(Link *link) {
2408 TrafficControl *tc;
02b59d57
TG		 2409 int r;
2410
34658df2
YW		 2411 link->tc_configured = false;
2412 link->tc_messages = 0;
4ecdcb07 2413
90e74a66 2414 ORDERED_HASHMAP_FOREACH(tc, link->network->tc_by_section) {
34658df2 2415 r = traffic_control_configure(link, tc);
4ecdcb07
YW		 2416 if (r < 0)
2417 return r;
2418 }
2419
34658df2
YW		 2420 if (link->tc_messages == 0)
2421 link->tc_configured = true;
4ecdcb07 2422 else
34658df2 2423 log_link_debug(link, "Configuring traffic control");
4ecdcb07
YW		 2424
2425 return 0;
2426}
2427
518cd6b5
SS		 2428static int link_configure_sr_iov(Link *link) {
2429 SRIOV *sr_iov;
518cd6b5
SS		 2430 int r;
2431
2432 link->sr_iov_configured = false;
2433 link->sr_iov_messages = 0;
2434
90e74a66 2435 ORDERED_HASHMAP_FOREACH(sr_iov, link->network->sr_iov_by_section) {
518cd6b5
SS		 2436 r = sr_iov_configure(link, sr_iov);
2437 if (r < 0)
2438 return r;
2439 }
2440
2441 if (link->sr_iov_messages == 0)
2442 link->sr_iov_configured = true;
2443 else
2444 log_link_debug(link, "Configuring SR-IOV");
2445
2446 return 0;
2447}
2448
4ecdcb07
YW		 2449static int link_configure(Link *link) {
2450 int r;
2451
ef1ba606 2452 assert(link);
b22d8a00 2453 assert(link->network);
bd08ce56 2454 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2455
34658df2 2456 r = link_configure_traffic_control(link);
4ecdcb07
YW		 2457 if (r < 0)
2458 return r;
2459
518cd6b5
SS		 2460 r = link_configure_sr_iov(link);
2461 if (r < 0)
2462 return r;
2463
500b96eb 2464 if (link->iftype == ARPHRD_CAN)
93ea7750 2465 return link_configure_can(link);
92c918b0 2466
482efedc
SS		 2467 /* If IPv6 configured that is static IPv6 address and IPv6LL autoconfiguration is enabled
2468 * for this interface, then enable IPv6 */
57ad7607 2469 (void) link_update_ipv6_sysctl(link);
482efedc 2470
23d8b221
SS		 2471 r = link_set_proxy_arp(link);
2472 if (r < 0)
2473 return r;
2474
c16b5821 2475 r = link_set_ipv6_proxy_ndp_addresses(link);
a0e5c15d
FK		 2476 if (r < 0)
2477 return r;
2478
769d324c
LP		 2479 r = link_set_ipv4_forward(link);
2480 if (r < 0)
2481 return r;
2482
2483 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2484 if (r < 0)
2485 return r;
2486
49092e22
SS		 2487 r = link_set_ipv6_privacy_extensions(link);
2488 if (r < 0)
2489 return r;
2490
4f2e437a
SS		 2491 r = link_set_ipv6_accept_ra(link);
2492 if (r < 0)
2493 return r;
2494
8749cbcd
SS		 2495 r = link_set_ipv6_dad_transmits(link);
2496 if (r < 0)
2497 return r;
b69c3180
SS		 2498
2499 r = link_set_ipv6_hop_limit(link);
2500 if (r < 0)
2501 return r;
8749cbcd 2502
94d76d07
YW		 2503 r = link_set_ipv4_accept_local(link);
2504 if (r < 0)
2505 return r;
2506
99d2baa2
SS		 2507 r = link_set_flags(link);
2508 if (r < 0)
2509 return r;
2510
89fe6535
SS		 2511 r = link_set_group(link);
2512 if (r < 0)
2513 return r;
2514
910feb78 2515 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
b22d8a00 2516 r = ipv4ll_configure(link);
eb34d4af
TG		 2517 if (r < 0)
2518 return r;
2519 }
2520
78c958f8 2521 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2522 r = dhcp4_set_promote_secondaries(link);
2523 if (r < 0)
2524 return r;
2525
3c9b8860 2526 r = dhcp4_configure(link);
eb34d4af
TG		 2527 if (r < 0)
2528 return r;
eb34d4af
TG		 2529 }
2530
78c958f8 2531 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2532 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2533 if (r < 0)
2534 return r;
2535
2536 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2537 if (r < 0)
2538 return r;
dd43110f
TG		 2539 }
2540
62379e88
TG		 2541 if (link_dhcp6_enabled(link) ||
2542 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2543 r = dhcp6_configure(link);
2544 if (r < 0)
2545 return r;
2546 }
2547
2548 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2549 r = ndisc_configure(link);
4138fb2c
PF		 2550 if (r < 0)
2551 return r;
2552 }
2553
7465dd22
PF		 2554 if (link_radv_enabled(link)) {
2555 r = radv_configure(link);
2556 if (r < 0)
2557 return r;
2558 }
2559
8e1ad1ea 2560 if (link_lldp_rx_enabled(link)) {
7f853950 2561 r = link_lldp_rx_configure(link);
273eec24
LP		 2562 if (r < 0)
2563 return r;
ce43e484
SS		 2564 }
2565
f6fcc1c2 2566 r = link_configure_mtu(link);
40288ece
YW		 2567 if (r < 0)
2568 return r;
44b598a1 2569
9f6e82e6
YW		 2570 r = link_configure_addrgen_mode(link);
2571 if (r < 0)
2572 return r;
0e2fdb83 2573
051e77ca
SS		 2574 r = link_configure_ipv4_dad(link);
2575 if (r < 0)
2576 return r;
2577
3a390124
DS		 2578 return link_configure_continue(link);
2579}
2580
2581/* The configuration continues in this separate function, instead of
2582 * including this in the above link_configure() function, for two
2583 * reasons:
2584 * 1) some devices reset the link when the mtu is set, which caused
2585 * an infinite loop here in networkd; see:
2586 * https://github.com/systemd/systemd/issues/6593
2587 * https://github.com/systemd/systemd/issues/9831
2588 * 2) if ipv6ll is disabled, then bringing the interface up must be
2589 * delayed until after we get confirmation from the kernel that
2590 * the addr_gen_mode parameter has been set (via netlink), see:
2591 * https://github.com/systemd/systemd/issues/13882
2592 */
2593static int link_configure_continue(Link *link) {
55dc8c4a
YW		 2594 int r;
2595
2596 assert(link);
2597 assert(link->network);
bd08ce56 2598 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a 2599
9524014e 2600 if (link->setting_mtu || link->setting_genmode)
55dc8c4a
YW		 2601 return 0;
2602
4c649652
DS		 2603 /* Drop foreign config, but ignore loopback or critical devices.
2604 * We do not want to remove loopback address or addresses used for root NFS. */
2605 if (!(link->flags & IFF_LOOPBACK) &&
2606 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
2607 r = link_drop_foreign_config(link);
2608 if (r < 0)
2609 return r;
2610 }
2611
d236718c
DS		 2612 /* The kernel resets ipv6 mtu after changing device mtu;
2613 * we must set this here, after we've set device mtu */
2614 r = link_set_ipv6_mtu(link);
2615 if (r < 0)
2616 return r;
2617
dad2d78e 2618 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2619 r = link_acquire_conf(link);
2620 if (r < 0)
2621 return r;
cc544d5f 2622 }
1e9be60b 2623
3f265037 2624 return link_enter_join_netdev(link);
505f8da7
TG		 2625}
2626
27dfc982
YW		 2627static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2628 assert(duid);
2629
2630 if (duid->raw_data_len > 0)
2631 return 0;
2632
2633 if (duid->type != DUID_TYPE_UUID)
2634 return -EINVAL;
2635
2636 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2637 duid->raw_data_len = sizeof(sd_id128_t);
2638
2639 return 1;
2640}
2641
2642int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2643 Manager *manager = userdata;
2644 const sd_bus_error *e;
2645 const void *a;
2646 size_t sz;
2647 DUID *duid;
2648 Link *link;
2649 int r;
2650
2651 assert(m);
2652 assert(manager);
2653
2654 e = sd_bus_message_get_error(m);
2655 if (e) {
2656 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 2657 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 2658 e->message);
2659 goto configure;
2660 }
2661
2662 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2663 if (r < 0)
2664 goto configure;
2665
2666 if (sz != sizeof(sd_id128_t)) {
ab4dd984 2667 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 2668 goto configure;
2669 }
2670
2671 memcpy(&manager->product_uuid, a, sz);
2672 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2673 (void) duid_set_uuid(duid, manager->product_uuid);
2674
2675 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2676
2677configure:
2678 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3dc2e7af
YW		 2679 link_unref(link);
2680
27dfc982
YW		 2681 r = link_configure(link);
2682 if (r < 0)
4ff296b0 2683 link_enter_failed(link);
27dfc982
YW		 2684 }
2685
2686 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
2687
2688 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2689 * even if the method fails. */
2690 manager->has_product_uuid = true;
2691
2692 return 1;
2693}
2694
2695static bool link_requires_uuid(Link *link) {
2696 const DUID *duid;
2697
2698 assert(link);
2699 assert(link->manager);
2700 assert(link->network);
2701
2702 duid = link_get_duid(link);
2703 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
2704 return false;
2705
2706 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
2707 return true;
2708
2709 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
2710 return true;
2711
2712 return false;
2713}
2714
2715static int link_configure_duid(Link *link) {
2716 Manager *m;
2717 DUID *duid;
2718 int r;
2719
2720 assert(link);
2721 assert(link->manager);
2722 assert(link->network);
2723
2724 m = link->manager;
2725 duid = link_get_duid(link);
2726
2727 if (!link_requires_uuid(link))
2728 return 1;
2729
2730 if (m->has_product_uuid) {
2731 (void) duid_set_uuid(duid, m->product_uuid);
2732 return 1;
2733 }
2734
2735 if (!m->links_requesting_uuid) {
2736 r = manager_request_product_uuid(m, link);
2737 if (r < 0) {
2738 if (r == -ENOMEM)
2739 return r;
2740
ab4dd984
ZJS		 2741 log_link_warning_errno(link, r,
2742 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 2743 return 1;
2744 }
2745 } else {
2746 r = set_put(m->links_requesting_uuid, link);
2747 if (r < 0)
2748 return log_oom();
39dbd0c7
ZJS		 2749 if (r > 0)
2750 link_ref(link);
27dfc982
YW		 2751
2752 r = set_put(m->duids_requesting_uuid, duid);
2753 if (r < 0)
2754 return log_oom();
2755 }
2756
2757 return 0;
2758}
2759
572b21d9 2760static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
ad932b15
YW		 2761 Network *network;
2762 int r;
2763
572b21d9
YW		 2764 if (m) {
2765 _cleanup_strv_free_ char **s = NULL;
2766
2767 r = sd_netlink_message_get_errno(m);
2768 if (r < 0)
2769 return r;
2770
2771 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2772 if (r < 0 && r != -ENODATA)
2773 return r;
2774
2775 strv_free_and_replace(link->alternative_names, s);
2776 }
2777
c643bda5
YW		 2778 r = network_get(link->manager, link->iftype, link->sd_device,
2779 link->ifname, link->alternative_names, link->driver,
2780 &link->mac, &link->permanent_mac,
2781 link->wlan_iftype, link->ssid, &link->bssid, &network);
ad932b15
YW		 2782 if (r == -ENOENT) {
2783 link_enter_unmanaged(link);
2784 return 0;
2785 } else if (r == 0 && network->unmanaged) {
2786 link_enter_unmanaged(link);
2787 return 0;
2788 } else if (r < 0)
2789 return r;
2790
99b8517c 2791 if (link->network == network && !force)
ad932b15
YW		 2792 return 0;
2793
2794 log_link_info(link, "Re-configuring with %s", network->filename);
2795
2796 /* Dropping old .network file */
2797 r = link_stop_clients(link, false);
572b21d9 2798 if (r < 0)
ad932b15 2799 return r;
ad932b15
YW		 2800
2801 if (link_dhcp4_server_enabled(link))
2802 (void) sd_dhcp_server_stop(link->dhcp_server);
2803
2804 r = link_drop_config(link);
2805 if (r < 0)
2806 return r;
2807
2c7b826d 2808 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
ad932b15
YW		 2809 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
2810 r = link_drop_foreign_config(link);
2811 if (r < 0)
2812 return r;
2813 }
2814
2815 link_free_carrier_maps(link);
2816 link_free_engines(link);
2817 link->network = network_unref(link->network);
2818
2819 /* Then, apply new .network file */
2820 r = network_apply(network, link);
2821 if (r < 0)
2822 return r;
2823
2824 r = link_new_carrier_maps(link);
2825 if (r < 0)
2826 return r;
2827
2828 link_set_state(link, LINK_STATE_INITIALIZED);
8ae7b8a1 2829 link_dirty(link);
ad932b15
YW		 2830
2831 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2832 * link_configure() is called later asynchronously. */
2833 r = link_configure_duid(link);
2834 if (r <= 0)
2835 return r;
2836
2837 r = link_configure(link);
2838 if (r < 0)
2839 return r;
2840
2841 return 0;
2842}
2843
572b21d9
YW		 2844static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2845 int r;
2846
2847 r = link_reconfigure_internal(link, m, false);
2848 if (r < 0)
2849 link_enter_failed(link);
2850
2851 return 1;
2852}
2853
2854static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2855 int r;
2856
2857 r = link_reconfigure_internal(link, m, true);
2858 if (r < 0)
2859 link_enter_failed(link);
2860
2861 return 1;
2862}
2863
2864int link_reconfigure(Link *link, bool force) {
2865 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2866 int r;
2867
2c0d7ed3
YW		 2868 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
2869 return 0;
2870
572b21d9
YW		 2871 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2872 link->ifindex);
2873 if (r < 0)
2874 return r;
2875
2876 r = netlink_call_async(link->manager->rtnl, NULL, req,
2877 force ? link_force_reconfigure_handler : link_reconfigure_handler,
2878 link_netlink_destroy_callback, link);
2879 if (r < 0)
2880 return r;
2881
2882 link_ref(link);
2883
2884 return 0;
2885}
2886
e6bf7774 2887static int link_initialized_and_synced(Link *link) {
505f8da7 2888 Network *network;
505f8da7
TG		 2889 int r;
2890
2891 assert(link);
2892 assert(link->ifname);
2893 assert(link->manager);
2894
bd08ce56
YW		 2895 /* We may get called either from the asynchronous netlink callback,
2896 * or directly for link_add() if running in a container. See link_add(). */
2897 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2898 return 0;
505f8da7 2899
6a7a4e4d 2900 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2901 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2902
0d4ad91d
AR		 2903 r = link_new_bound_by_list(link);
2904 if (r < 0)
2905 return r;
2906
2907 r = link_handle_bound_by_list(link);
2908 if (r < 0)
2909 return r;
2910
c4a03a56 2911 if (!link->network) {
0894cfe4 2912 r = wifi_get_info(link);
8d968fdd
YW		 2913 if (r < 0)
2914 return r;
2915
c643bda5
YW		 2916 r = network_get(link->manager, link->iftype, link->sd_device,
2917 link->ifname, link->alternative_names, link->driver,
2918 &link->mac, &link->permanent_mac,
2919 link->wlan_iftype, link->ssid, &link->bssid, &network);
c4a03a56
TG		 2920 if (r == -ENOENT) {
2921 link_enter_unmanaged(link);
4232cf04 2922 return 0;
a09dc546
DM		 2923 } else if (r == 0 && network->unmanaged) {
2924 link_enter_unmanaged(link);
2925 return 0;
c4a03a56
TG		 2926 } else if (r < 0)
2927 return r;
505f8da7 2928
c4a03a56
TG		 2929 if (link->flags & IFF_LOOPBACK) {
2930 if (network->link_local != ADDRESS_FAMILY_NO)
2931 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2932
c4a03a56
TG		 2933 if (network->dhcp != ADDRESS_FAMILY_NO)
2934 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2935
c4a03a56
TG		 2936 if (network->dhcp_server)
2937 log_link_debug(link, "Ignoring DHCP server for loopback link");
2938 }
bd2efe92 2939
7d342c03 2940 r = network_apply(network, link);
c4a03a56
TG		 2941 if (r < 0)
2942 return r;
2943 }
505f8da7 2944
0d4ad91d
AR		 2945 r = link_new_bound_to_list(link);
2946 if (r < 0)
2947 return r;
2948
27dfc982
YW		 2949 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2950 * link_configure() is called later asynchronously. */
2951 r = link_configure_duid(link);
2952 if (r <= 0)
2953 return r;
2954
a748b692
TG		 2955 r = link_configure(link);
2956 if (r < 0)
2957 return r;
2958
4232cf04 2959 return 0;
505f8da7
TG		 2960}
2961
302a796f 2962static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
572b21d9 2963 _cleanup_strv_free_ char **s = NULL;
4ff296b0
YW		 2964 int r;
2965
572b21d9
YW		 2966 r = sd_netlink_message_get_errno(m);
2967 if (r < 0) {
40681e5c 2968 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 2969 link_enter_failed(link);
2970 return 0;
2971 }
2972
2973 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2974 if (r < 0 && r != -ENODATA) {
2975 link_enter_failed(link);
2976 return 0;
2977 }
2978
2979 strv_free_and_replace(link->alternative_names, s);
2980
4ff296b0
YW		 2981 r = link_initialized_and_synced(link);
2982 if (r < 0)
2983 link_enter_failed(link);
e6bf7774
YW		 2984 return 1;
2985}
2986
51517f9e 2987int link_initialized(Link *link, sd_device *device) {
4afd3348 2988 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2989 int r;
2990
2991 assert(link);
2992 assert(link->manager);
2993 assert(link->manager->rtnl);
2994 assert(device);
2995
8434fd5c 2996 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2997 return 0;
2998
51517f9e 2999 if (link->sd_device)
679b3605
TG		 3000 return 0;
3001
79008bdd 3002 log_link_debug(link, "udev initialized link");
bd08ce56 3003 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 3004
51517f9e 3005 link->sd_device = sd_device_ref(device);
4f561e8e 3006
3c9b8860
TG		 3007 /* udev has initialized the link, but we don't know if we have yet
3008 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3009 * when it returns we know that the pending NEWLINKs have already been
3010 * processed and that we are up-to-date */
4f561e8e 3011
3c9b8860
TG		 3012 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3013 link->ifindex);
4f561e8e
TG		 3014 if (r < 0)
3015 return r;
3016
302a796f
YW		 3017 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3018 link_netlink_destroy_callback, link);
4f561e8e
TG		 3019 if (r < 0)
3020 return r;
3021
5da8149f
TG		 3022 link_ref(link);
3023
4f561e8e
TG		 3024 return 0;
3025}
3026
c4a03a56 3027static int link_load(Link *link) {
0bc70f1d
TG		 3028 _cleanup_free_ char *network_file = NULL,
3029 *addresses = NULL,
f703cc2c 3030 *routes = NULL,
0bc70f1d
TG		 3031 *dhcp4_address = NULL,
3032 *ipv4ll_address = NULL;
3033 union in_addr_union address;
c4a03a56
TG		 3034 int r;
3035
3036 assert(link);
3037
aa8fbc74 3038 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3039 "NETWORK_FILE", &network_file,
3040 "ADDRESSES", &addresses,
f703cc2c 3041 "ROUTES", &routes,
0bc70f1d 3042 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3043 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3044 if (r < 0 && r != -ENOENT)
3045 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3046
3047 if (network_file) {
3048 Network *network;
3049 char *suffix;
3050
3051 /* drop suffix */
3052 suffix = strrchr(network_file, '.');
3053 if (!suffix) {
3054 log_link_debug(link, "Failed to get network name from %s", network_file);
3055 goto network_file_fail;
3056 }
3057 *suffix = '\0';
3058
3059 r = network_get_by_name(link->manager, basename(network_file), &network);
3060 if (r < 0) {
3061 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3062 goto network_file_fail;
3063 }
3064
7d342c03 3065 r = network_apply(network, link);
c4a03a56
TG		 3066 if (r < 0)
3067 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3068 }
3069
3070network_file_fail:
3071
da4d3a61
YW		 3072 r = link_deserialize_addresses(link, addresses);
3073 if (r < 0)
3074 log_link_warning_errno(link, r, "Failed to load addresses from %s, ignoring: %m", link->state_file);
74544b4e 3075
731ff05b
YW		 3076 r = link_deserialize_routes(link, routes);
3077 if (r < 0)
3078 log_link_warning_errno(link, r, "Failed to load routes from %s, ignoring: %m", link->state_file);
f703cc2c 3079
0bc70f1d
TG		 3080 if (dhcp4_address) {
3081 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3082 if (r < 0) {
b68d26b8 3083 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3084 goto dhcp4_address_fail;
3085 }
3086
b1c626f6 3087 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3088 if (r < 0)
b68d26b8 3089 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d 3090
1b43e246
DS		 3091 r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0);
3092 if (r < 0)
3093 return log_link_error_errno(link, r, "Failed to attach DHCPv4 event: %m");
3094
0bc70f1d
TG		 3095 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3096 if (r < 0)
b68d26b8 3097 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3098 }
3099
3100dhcp4_address_fail:
3101
3102 if (ipv4ll_address) {
3103 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3104 if (r < 0) {
b68d26b8 3105 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3106 goto ipv4ll_address_fail;
3107 }
3108
3109 r = sd_ipv4ll_new(&link->ipv4ll);
3110 if (r < 0)
b68d26b8 3111 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d 3112
1b43e246
DS		 3113 r = sd_ipv4ll_attach_event(link->ipv4ll, NULL, 0);
3114 if (r < 0)
3115 return log_link_error_errno(link, r, "Failed to attach IPv4LL event: %m");
3116
0bc70f1d
TG		 3117 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3118 if (r < 0)
b68d26b8 3119 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3120 }
3121
3122ipv4ll_address_fail:
3123
c4a03a56
TG		 3124 return 0;
3125}
3126
1c4baffc 3127int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3128 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3129 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3130 Link *link;
5a937ea2 3131 int r;
505f8da7
TG		 3132
3133 assert(m);
fbbeb65a 3134 assert(m->rtnl);
505f8da7
TG		 3135 assert(message);
3136 assert(ret);
3137
3138 r = link_new(m, message, ret);
3139 if (r < 0)
3140 return r;
3141
3142 link = *ret;
3143
6a7a4e4d 3144 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3145
c4a03a56
TG		 3146 r = link_load(link);
3147 if (r < 0)
3148 return r;
3149
bf331d87
YW		 3150 if (path_is_read_only_fs("/sys") <= 0) {
3151 /* udev should be around */
ae06ab10 3152 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3153 r = sd_device_new_from_device_id(&device, ifindex_str);
3154 if (r < 0) {
4d59e14f
YW		 3155 log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m");
3156 return 0;
5c416fc4 3157 }
505f8da7 3158
5a937ea2 3159 r = sd_device_get_is_initialized(device);
51517f9e 3160 if (r < 0) {
bf331d87 3161 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 3162 goto failed;
3163 }
5a937ea2 3164 if (r == 0) {
505f8da7 3165 /* not yet ready */
79008bdd 3166 log_link_debug(link, "link pending udev initialization...");
505f8da7 3167 return 0;
3c4cb064 3168 }
505f8da7 3169
299ad32d
YW		 3170 r = device_is_renaming(device);
3171 if (r < 0) {
bf331d87 3172 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 3173 goto failed;
3174 }
3175 if (r > 0) {
bf331d87 3176 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 3177 return 0;
3178 }
3179
4f561e8e
TG		 3180 r = link_initialized(link, device);
3181 if (r < 0)
5c416fc4 3182 goto failed;
4f561e8e 3183 } else {
e6bf7774 3184 r = link_initialized_and_synced(link);
4f561e8e 3185 if (r < 0)
5c416fc4 3186 goto failed;
4f561e8e 3187 }
505f8da7 3188
a748b692 3189 return 0;
5c416fc4
TG		 3190failed:
3191 link_enter_failed(link);
3192 return r;
a748b692
TG		 3193}
3194
c601ebf7 3195int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3196 int r;
3197
3198 assert(link);
3199
3200 log_link_info(link, "Gained IPv6LL");
3201
c601ebf7 3202 link->ipv6ll_address = *address;
e7ab854c
TG		 3203 link_check_ready(link);
3204
b9ea3d2e 3205 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3206 r = link_acquire_ipv6_conf(link);
3207 if (r < 0) {
3208 link_enter_failed(link);
3209 return r;
3210 }
3211 }
3212
3213 return 0;
3214}
3215
9c0a72f9
TG		 3216static int link_carrier_gained(Link *link) {
3217 int r;
3218
3219 assert(link);
3220
0894cfe4 3221 r = wifi_get_info(link);
8d968fdd
YW		 3222 if (r < 0)
3223 return r;
3224 if (r > 0) {
572b21d9
YW		 3225 r = link_reconfigure_internal(link, NULL, false);
3226 if (r < 0) {
3227 link_enter_failed(link);
8d968fdd 3228 return r;
572b21d9 3229 }
8d968fdd
YW		 3230 }
3231
b9ea3d2e 3232 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3233 r = link_acquire_conf(link);
3234 if (r < 0) {
3235 link_enter_failed(link);
3236 return r;
3237 }
6fc25497 3238
b425c3ae 3239 link_set_state(link, LINK_STATE_CONFIGURING);
682c65b0 3240 r = link_set_static_configs(link);
6fc25497
SS		 3241 if (r < 0)
3242 return r;
9c0a72f9
TG		 3243 }
3244
0d4ad91d
AR		 3245 r = link_handle_bound_by_list(link);
3246 if (r < 0)
3247 return r;
3248
1f241589
YW		 3249 if (!link->bridge_mdb_configured) {
3250 r = link_set_bridge_mdb(link);
3251 if (r < 0)
3252 return r;
3253 }
3254
3255 if (streq_ptr(link->kind, "bridge")) {
3256 Link *slave;
3257
3258 SET_FOREACH(slave, link->slaves) {
3259 if (slave->bridge_mdb_configured)
3260 continue;
3261
3262 r = link_set_bridge_mdb(slave);
3263 if (r < 0)
3264 link_enter_failed(slave);
3265 }
3266 }
3db468ea 3267
9c0a72f9
TG		 3268 return 0;
3269}
3270
3271static int link_carrier_lost(Link *link) {
3272 int r;
3273
3274 assert(link);
3275
25e992ba 3276 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3277 return 0;
3278
fbdb6605 3279 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3280 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3281 * configuration and stop the clients as well. */
97e7fb39
SS		 3282 if (link->setting_mtu)
3283 return 0;
3284
95355a28 3285 r = link_stop_clients(link, false);
9c0a72f9
TG		 3286 if (r < 0) {
3287 link_enter_failed(link);
3288 return r;
3289 }
3290
28464ae0
SS		 3291 if (link_dhcp4_server_enabled(link))
3292 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3293
3104883d
SS		 3294 r = link_drop_config(link);
3295 if (r < 0)
3296 return r;
3297
2c7b826d 3298 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
f258e948 3299 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3300 r = link_drop_foreign_config(link);
3301 if (r < 0)
3302 return r;
3303 }
3104883d 3304
0d4ad91d
AR		 3305 r = link_handle_bound_by_list(link);
3306 if (r < 0)
3307 return r;
3308
9c0a72f9
TG		 3309 return 0;
3310}
3311
3312int link_carrier_reset(Link *link) {
3313 int r;
3314
3315 assert(link);
3316
3317 if (link_has_carrier(link)) {
3318 r = link_carrier_lost(link);
3319 if (r < 0)
3320 return r;
3321
3322 r = link_carrier_gained(link);
3323 if (r < 0)
3324 return r;
3325
6a7a4e4d 3326 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3327 }
3328
3329 return 0;
3330}
3331
d236718c
DS		 3332/* This is called every time an interface admin state changes to up;
3333 * specifically, when IFF_UP flag changes from unset to set */
3334static int link_admin_state_up(Link *link) {
3335 int r;
3336
3337 /* We set the ipv6 mtu after the device mtu, but the kernel resets
3338 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
3339 * ipv6_mtu_set prevents this from trying to set it too early before
3340 * the link->network has been setup; we only need to reset it
3341 * here if we've already set it during normal initialization. */
3342 if (link->ipv6_mtu_set) {
3343 r = link_set_ipv6_mtu(link);
3344 if (r < 0)
3345 return r;
3346 }
3347
3348 return 0;
3349}
3350
1c4baffc 3351int link_update(Link *link, sd_netlink_message *m) {
572b21d9 3352 _cleanup_strv_free_ char **s = NULL;
c49b33ac 3353 struct ether_addr mac;
ca4e095a 3354 const char *ifname;
afe7fd56 3355 uint32_t mtu;
d236718c 3356 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 3357 int old_master, r;
22936833 3358
dd3efc09 3359 assert(link);
b8941f74 3360 assert(link->ifname);
22936833
TG		 3361 assert(m);
3362
7619683b 3363 if (link->state == LINK_STATE_LINGER) {
5238e957 3364 log_link_info(link, "Link re-added");
289e6774 3365 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3366
3367 r = link_new_carrier_maps(link);
3368 if (r < 0)
3369 return r;
7619683b
TG		 3370 }
3371
1c4baffc 3372 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3373 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3374 Manager *manager = link->manager;
b8941f74 3375
30de2b89 3376 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3377
30de2b89
YW		 3378 link_drop(link);
3379 r = link_add(manager, m, &link);
3380 if (r < 0)
3381 return r;
b8941f74
TG		 3382 }
3383
572b21d9
YW		 3384 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3385 if (r >= 0)
3386 strv_free_and_replace(link->alternative_names, s);
3387
1c4baffc 3388 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3389 if (r >= 0 && mtu > 0) {
3390 link->mtu = mtu;
4e964aa0 3391 if (link->original_mtu == 0) {
afe7fd56 3392 link->original_mtu = mtu;
6a7a4e4d 3393 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3394 }
3395
3396 if (link->dhcp_client) {
3c9b8860
TG		 3397 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3398 link->mtu);
fc95c359
YW		 3399 if (r < 0)
3400 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3401 }
7465dd22
PF		 3402
3403 if (link->radv) {
3404 r = sd_radv_set_mtu(link->radv, link->mtu);
3405 if (r < 0)
3406 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3407 }
9842de0d 3408 }
69629de9 3409
e9189a1f
TG		 3410 /* The kernel may broadcast NEWLINK messages without the MAC address
3411 set, simply ignore them. */
1c4baffc 3412 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
807667f7
YW		 3413 if (r >= 0 && memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN) != 0) {
3414
3415 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN);
3416
3417 log_link_debug(link, "Gained new MAC address: "
3418 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3419 mac.ether_addr_octet[0],
3420 mac.ether_addr_octet[1],
3421 mac.ether_addr_octet[2],
3422 mac.ether_addr_octet[3],
3423 mac.ether_addr_octet[4],
3424 mac.ether_addr_octet[5]);
3425
3426 if (link->ipv4ll) {
3427 bool restart = sd_ipv4ll_is_running(link->ipv4ll) > 0;
3428
3429 if (restart) {
3430 r = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 3431 if (r < 0)
807667f7 3432 return log_link_warning_errno(link, r, "Could not stop IPv4LL client: %m");
c49b33ac 3433 }
c49b33ac 3434
807667f7
YW		 3435 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
3436 if (r < 0)
3437 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
3438
3439 if (restart) {
3440 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d 3441 if (r < 0)
807667f7
YW		 3442 return log_link_warning_errno(link, r, "Could not restart IPv4LL client: %m");
3443 }
3444 }
3445
3446 if (link->dhcp_client) {
3447 r = sd_dhcp_client_set_mac(link->dhcp_client,
3448 (const uint8_t *) &link->mac,
3449 sizeof (link->mac),
3450 ARPHRD_ETHER);
3451 if (r < 0)
3452 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
3453
3454 r = dhcp4_set_client_identifier(link);
3455 if (r < 0)
3456 return log_link_warning_errno(link, r, "Could not set DHCP client identifier: %m");
3457 }
413708d1 3458
807667f7
YW		 3459 if (link->dhcp6_client) {
3460 const DUID* duid = link_get_duid(link);
3461 bool restart = sd_dhcp6_client_is_running(link->dhcp6_client) > 0;
3462
3463 if (restart) {
3464 r = sd_dhcp6_client_stop(link->dhcp6_client);
fff1f40c 3465 if (r < 0)
807667f7 3466 return log_link_warning_errno(link, r, "Could not stop DHCPv6 client: %m");
c49b33ac 3467 }
4138fb2c 3468
807667f7
YW		 3469 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
3470 (const uint8_t *) &link->mac,
3471 sizeof (link->mac),
3472 ARPHRD_ETHER);
3473 if (r < 0)
3474 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
8341a5c3 3475
807667f7
YW		 3476 if (link->network->iaid_set) {
3477 r = sd_dhcp6_client_set_iaid(link->dhcp6_client, link->network->iaid);
6a7a4e4d 3478 if (r < 0)
807667f7
YW		 3479 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3480 }
3481
3482 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3483 duid->type,
3484 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3485 duid->raw_data_len);
3486 if (r < 0)
3487 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
3488
3489 if (restart) {
3490 r = sd_dhcp6_client_start(link->dhcp6_client);
413708d1 3491 if (r < 0)
807667f7 3492 return log_link_warning_errno(link, r, "Could not restart DHCPv6 client: %m");
4138fb2c 3493 }
807667f7 3494 }
7465dd22 3495
807667f7
YW		 3496 if (link->radv) {
3497 bool restart = sd_radv_is_running(link->radv);
3498
3499 if (restart) {
3500 r = sd_radv_stop(link->radv);
7465dd22 3501 if (r < 0)
807667f7 3502 return log_link_warning_errno(link, r, "Could not stop Router Advertisement: %m");
7465dd22 3503 }
420d2058 3504
807667f7
YW		 3505 r = sd_radv_set_mac(link->radv, &link->mac);
3506 if (r < 0)
3507 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3508
3509 if (restart) {
3510 r = sd_radv_start(link->radv);
420d2058 3511 if (r < 0)
807667f7 3512 return log_link_warning_errno(link, r, "Could not restart Router Advertisement: %m");
420d2058 3513 }
c49b33ac 3514 }
807667f7
YW		 3515
3516 if (link->ndisc) {
3517 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3518 if (r < 0)
3519 return log_link_warning_errno(link, r, "Could not update MAC for NDisc: %m");
3520 }
4f882b2a
TG		 3521 }
3522
bb262ef0
YW		 3523 old_master = link->master_ifindex;
3524 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
3525
d236718c 3526 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 3527 had_carrier = link_has_carrier(link);
3528
bb262ef0 3529 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 3530 if (r < 0)
3531 return r;
3532
d236718c
DS		 3533 if (!link_was_admin_up && (link->flags & IFF_UP)) {
3534 log_link_info(link, "Link UP");
3535
3536 r = link_admin_state_up(link);
3537 if (r < 0)
3538 return r;
3539 } else if (link_was_admin_up && !(link->flags & IFF_UP))
3540 log_link_info(link, "Link DOWN");
3541
273eec24
LP		 3542 r = link_update_lldp(link);
3543 if (r < 0)
3544 return r;
3545
a61bb41c
TG		 3546 carrier_gained = !had_carrier && link_has_carrier(link);
3547 carrier_lost = had_carrier && !link_has_carrier(link);
3548
3549 if (carrier_gained) {
6a7a4e4d 3550 log_link_info(link, "Gained carrier");
a61bb41c 3551
9c0a72f9
TG		 3552 r = link_carrier_gained(link);
3553 if (r < 0)
3554 return r;
a61bb41c 3555 } else if (carrier_lost) {
6a7a4e4d 3556 log_link_info(link, "Lost carrier");
a61bb41c 3557
9c0a72f9
TG		 3558 r = link_carrier_lost(link);
3559 if (r < 0)
a61bb41c 3560 return r;
a61bb41c
TG		 3561 }
3562
3563 return 0;
dd3efc09 3564}
fe8db0c5 3565
b295beea
LP		 3566static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3567 bool space = false;
b295beea
LP		 3568 Link *link;
3569
3570 assert(f);
3571 assert(prefix);
3572
3573 if (hashmap_isempty(h))
3574 return;
3575
0d536673 3576 fputs(prefix, f);
90e74a66 3577 HASHMAP_FOREACH(link, h) {
b295beea 3578 if (space)
0d536673 3579 fputc(' ', f);
b295beea
LP		 3580
3581 fprintf(f, "%i", link->ifindex);
3582 space = true;
3583 }
3584
0d536673 3585 fputc('\n', f);
b295beea
LP		 3586}
3587
64581765 3588static void link_save_dns(Link *link, FILE *f, struct in_addr_full **dns, unsigned n_dns, bool *space) {
dddc8d1e 3589 for (unsigned j = 0; j < n_dns; j++) {
e77bd3fd 3590 const char *str;
15761549 3591
64581765
YW		 3592 if (dns[j]->ifindex != 0 && dns[j]->ifindex != link->ifindex)
3593 continue;
3594
e77bd3fd
YW		 3595 str = in_addr_full_to_string(dns[j]);
3596 if (!str)
15761549 3597 continue;
15761549
YW		 3598
3599 if (*space)
3600 fputc(' ', f);
e77bd3fd 3601 fputs(str, f);
15761549
YW		 3602 *space = true;
3603 }
3604}
3605
d5e172d2
ZJS		 3606static void serialize_addresses(
3607 FILE *f,
3608 const char *lvalue,
3609 bool *space,
3610 char **addresses,
3611 sd_dhcp_lease *lease,
3612 bool conditional,
ddb82ec2 3613 sd_dhcp_lease_server_type what,
d5e172d2
ZJS		 3614 sd_dhcp6_lease *lease6,
3615 bool conditional6,
3616 int (*lease6_get_addr)(sd_dhcp6_lease*, const struct in6_addr**),
3617 int (*lease6_get_fqdn)(sd_dhcp6_lease*, char ***)) {
3618 int r;
3619
3620 bool _space = false;
3621 if (!space)
3622 space = &_space;
3623
3624 if (lvalue)
3625 fprintf(f, "%s=", lvalue);
3626 fputstrv(f, addresses, NULL, space);
3627
3628 if (lease && conditional) {
3629 const struct in_addr *lease_addresses;
3630
3631 r = sd_dhcp_lease_get_servers(lease, what, &lease_addresses);
3632 if (r > 0)
d8bff5cc 3633 serialize_in_addrs(f, lease_addresses, r, space, in4_addr_is_non_local);
d5e172d2
ZJS		 3634 }
3635
3636 if (lease6 && conditional6 && lease6_get_addr) {
3637 const struct in6_addr *in6_addrs;
3638
3639 r = lease6_get_addr(lease6, &in6_addrs);
d8bff5cc
ZJS		 3640 if (r > 0)
3641 serialize_in6_addrs(f, in6_addrs, r, space);
d5e172d2
ZJS		 3642 }
3643
3644 if (lease6 && conditional6 && lease6_get_fqdn) {
3645 char **in6_hosts;
3646
3647 r = lease6_get_fqdn(lease6, &in6_hosts);
3648 if (r > 0)
3649 fputstrv(f, in6_hosts, NULL, space);
3650 }
3651
3652 if (lvalue)
3653 fputc('\n', f);
3654}
3655
fe8db0c5 3656int link_save(Link *link) {
d361b373 3657 const char *admin_state, *oper_state, *carrier_state, *address_state;
68a8723c 3658 _cleanup_free_ char *temp_path = NULL;
fe8db0c5
TG		 3659 _cleanup_fclose_ FILE *f = NULL;
3660 int r;
3661
3662 assert(link);
3663 assert(link->state_file);
68a8723c 3664 assert(link->lease_file);
bbf7c048
TG		 3665 assert(link->manager);
3666
370e9930 3667 if (link->state == LINK_STATE_LINGER) {
6990fb6b 3668 (void) unlink(link->state_file);
370e9930
TG		 3669 return 0;
3670 }
3671
34437b4f
LP		 3672 link_lldp_save(link);
3673
deb2e523
TG		 3674 admin_state = link_state_to_string(link->state);
3675 assert(admin_state);
3676
e375dcde
TG		 3677 oper_state = link_operstate_to_string(link->operstate);
3678 assert(oper_state);
deb2e523 3679
ac999bf0
YW		 3680 carrier_state = link_carrier_state_to_string(link->carrier_state);
3681 assert(carrier_state);
3682
3683 address_state = link_address_state_to_string(link->address_state);
3684 assert(address_state);
3685
fe8db0c5
TG		 3686 r = fopen_temporary(link->state_file, &f, &temp_path);
3687 if (r < 0)
6a7a4e4d 3688 goto fail;
fe8db0c5 3689
5512a963 3690 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3691
3692 fprintf(f,
3693 "# This is private data. Do not parse.\n"
deb2e523 3694 "ADMIN_STATE=%s\n"
ac999bf0
YW		 3695 "OPER_STATE=%s\n"
3696 "CARRIER_STATE=%s\n"
3697 "ADDRESS_STATE=%s\n",
3698 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 3699
bcb7a07e 3700 if (link->network) {
fe0e16db
YW		 3701 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
3702 const char *dhcp_domainname = NULL, *p;
fe0e16db 3703 bool space;
07bdc70d 3704
c1a38904
MTL		 3705 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3706 yes_no(link->network->required_for_online));
3707
d5e172d2
ZJS		 3708 LinkOperationalStateRange st = link->network->required_operstate_for_online;
3709 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s%s%s\n",
3710 strempty(link_operstate_to_string(st.min)),
3711 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? ":" : "",
3712 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? strempty(link_operstate_to_string(st.max)) : "");
4ac77d63 3713
adc5b2e2
TG		 3714 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3715
d5e172d2
ZJS		 3716 /************************************************************/
3717
0d536673 3718 fputs("DNS=", f);
ea352b40 3719 space = false;
15761549 3720 if (link->n_dns != (unsigned) -1)
64581765 3721 link_save_dns(link, f, link->dns, link->n_dns, &space);
15761549 3722 else
64581765 3723 link_save_dns(link, f, link->network->dns, link->network->n_dns, &space);
d5314fff 3724
d5e172d2
ZJS		 3725 serialize_addresses(f, NULL, &space,
3726 NULL,
3727 link->dhcp_lease,
3728 link->network->dhcp_use_dns,
ddb82ec2 3729 SD_DHCP_LEASE_DNS,
1633c457 3730 link->dhcp6_lease,
d5e172d2
ZJS		 3731 link->network->dhcp6_use_dns,
3732 sd_dhcp6_lease_get_dns,
3733 NULL);
1e7a0e21 3734
a8c10331 3735 /* Make sure to flush out old entries before we use the NDisc data */
1e7a0e21
LP		 3736 ndisc_vacuum(link);
3737
b296797f 3738 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3739 NDiscRDNSS *dd;
3740
90e74a66 3741 SET_FOREACH(dd, link->ndisc_rdnss)
d8bff5cc 3742 serialize_in6_addrs(f, &dd->address, 1, &space);
299d578f
SS		 3743 }
3744
3745 fputc('\n', f);
3746
d5e172d2
ZJS		 3747 /************************************************************/
3748
3749 serialize_addresses(f, "NTP", NULL,
3750 link->ntp ?: link->network->ntp,
3751 link->dhcp_lease,
3752 link->network->dhcp_use_ntp,
ddb82ec2 3753 SD_DHCP_LEASE_NTP,
1633c457 3754 link->dhcp6_lease,
d5e172d2
ZJS		 3755 link->network->dhcp6_use_ntp,
3756 sd_dhcp6_lease_get_ntp_addrs,
3757 sd_dhcp6_lease_get_ntp_fqdn);
3758
3759 serialize_addresses(f, "SIP", NULL,
2a71d57f 3760 NULL,
d5e172d2
ZJS		 3761 link->dhcp_lease,
3762 link->network->dhcp_use_sip,
ddb82ec2 3763 SD_DHCP_LEASE_SIP,
2a71d57f 3764 NULL, false, NULL, NULL);
d5e172d2
ZJS		 3765
3766 /************************************************************/
bd8f6538 3767
b2a81c0b 3768 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3769 if (link->dhcp_lease) {
b2a81c0b 3770 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3771 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3772 }
1633c457
YW		 3773 if (link->dhcp6_lease)
3774 (void) sd_dhcp6_lease_get_domains(link->dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3775 }
3776
fe0e16db
YW		 3777 fputs("DOMAINS=", f);
3778 space = false;
90e74a66 3779 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains)
fe0e16db 3780 fputs_with_space(f, p, NULL, &space);
07bdc70d 3781
1e7a0e21 3782 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP		 3783 if (dhcp_domainname)
3784 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3785 if (dhcp_domains)
3786 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3787 if (dhcp6_domains)
3788 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 3789 }
3790
3791 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
3792 NDiscDNSSL *dd;
1e7a0e21 3793
90e74a66 3794 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 3795 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3796 }
b2a81c0b 3797
0d536673 3798 fputc('\n', f);
6192b846 3799
d5e172d2
ZJS		 3800 /************************************************************/
3801
fe0e16db
YW		 3802 fputs("ROUTE_DOMAINS=", f);
3803 space = false;
90e74a66 3804 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains)
fe0e16db 3805 fputs_with_space(f, p, NULL, &space);
b2a81c0b 3806
1e7a0e21 3807 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
1e7a0e21
LP		 3808 if (dhcp_domainname)
3809 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3810 if (dhcp_domains)
3811 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3812 if (dhcp6_domains)
3813 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 3814 }
3815
3816 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3817 NDiscDNSSL *dd;
1e7a0e21 3818
90e74a66 3819 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 3820 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3821 }
b2a81c0b 3822
0d536673 3823 fputc('\n', f);
67272d15 3824
d5e172d2
ZJS		 3825 /************************************************************/
3826
3c9b8860 3827 fprintf(f, "LLMNR=%s\n",
15761549 3828 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
d5e172d2
ZJS		 3829
3830 /************************************************************/
3831
aaa297d4 3832 fprintf(f, "MDNS=%s\n",
15761549 3833 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
15761549 3834
d5e172d2
ZJS		 3835 /************************************************************/
3836
3837 int dns_default_route =
3838 link->dns_default_route >= 0 ? link->dns_default_route :
3839 link->network->dns_default_route;
3840 if (dns_default_route >= 0)
3841 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(dns_default_route));
3842
3843 /************************************************************/
3844
3845 DnsOverTlsMode dns_over_tls_mode =
3846 link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID ? link->dns_over_tls_mode :
3847 link->network->dns_over_tls_mode;
3848 if (dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3849 fprintf(f, "DNS_OVER_TLS=%s\n", dns_over_tls_mode_to_string(dns_over_tls_mode));
3850
3851 /************************************************************/
3852
3853 DnssecMode dnssec_mode =
3854 link->dnssec_mode != _DNSSEC_MODE_INVALID ? link->dnssec_mode :
3855 link->network->dnssec_mode;
3856 if (dnssec_mode != _DNSSEC_MODE_INVALID)
3857 fprintf(f, "DNSSEC=%s\n", dnssec_mode_to_string(dnssec_mode));
3858
3859 /************************************************************/
3860
3861 Set *nta_anchors = link->dnssec_negative_trust_anchors;
3862 if (set_isempty(nta_anchors))
3863 nta_anchors = link->network->dnssec_negative_trust_anchors;
3864
3865 if (!set_isempty(nta_anchors)) {
8a516214
LP		 3866 const char *n;
3867
0d536673 3868 fputs("DNSSEC_NTA=", f);
8a516214 3869 space = false;
90e74a66 3870 SET_FOREACH(n, nta_anchors)
d390f8ef 3871 fputs_with_space(f, n, NULL, &space);
0d536673 3872 fputc('\n', f);
8a516214
LP		 3873 }
3874
d5e172d2
ZJS		 3875 /************************************************************/
3876
3b31e2b7
YW		 3877 r = link_serialize_addresses(link, f);
3878 if (r < 0)
3879 goto fail;
c1eb9872 3880
d5e172d2
ZJS		 3881 /************************************************************/
3882
56519412
YW		 3883 r = link_serialize_routes(link, f);
3884 if (r < 0)
3885 goto fail;
bcb7a07e 3886 }
7374f9d8 3887
b295beea
LP		 3888 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3889 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3890
8eb9058d 3891 if (link->dhcp_lease) {
bd91b83e 3892 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3893 if (r < 0)
c2d6bd61 3894 goto fail;
fe8db0c5 3895
7374f9d8 3896 fprintf(f,
b0e39c82
TG		 3897 "DHCP_LEASE=%s\n",
3898 link->lease_file);
deb2e523 3899 } else
6990fb6b 3900 (void) unlink(link->lease_file);
fe8db0c5 3901
0bc70f1d
TG		 3902 if (link->ipv4ll) {
3903 struct in_addr address;
3904
3905 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3906 if (r >= 0) {
0d536673 3907 fputs("IPV4LL_ADDRESS=", f);
072320ea 3908 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3909 fputc('\n', f);
0bc70f1d
TG		 3910 }
3911 }
3912
7e738e7b
SS		 3913 if (link->dhcp6_client) {
3914 _cleanup_free_ char *duid = NULL;
3915 uint32_t iaid;
3916
3917 r = sd_dhcp6_client_get_iaid(link->dhcp6_client, &iaid);
3918 if (r >= 0)
3919 fprintf(f, "DHCP6_CLIENT_IAID=0x%x\n", iaid);
3920
3921 r = sd_dhcp6_client_duid_as_string(link->dhcp6_client, &duid);
3922 if (r >= 0)
3923 fprintf(f, "DHCP6_CLIENT_DUID=%s\n", duid);
3924 }
18d8a2cf 3925
c2d6bd61
LP		 3926 r = fflush_and_check(f);
3927 if (r < 0)
3928 goto fail;
fe8db0c5 3929
c2d6bd61 3930 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3931 r = -errno;
c2d6bd61 3932 goto fail;
fe8db0c5
TG		 3933 }
3934
c2d6bd61 3935 return 0;
dacd6cee 3936
c2d6bd61 3937fail:
6a7a4e4d 3938 (void) unlink(link->state_file);
6a7a4e4d
LP		 3939 if (temp_path)
3940 (void) unlink(temp_path);
3941
dacd6cee 3942 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3943}
3944
84de38c5
TG		 3945/* The serialized state in /run is no longer up-to-date. */
3946void link_dirty(Link *link) {
3947 int r;
3948
3949 assert(link);
3950
0c241a37
SS		 3951 /* mark manager dirty as link is dirty */
3952 manager_dirty(link->manager);
3953
de7fef4b 3954 r = set_ensure_put(&link->manager->dirty_links, NULL, link);
0c241a37 3955 if (r <= 0)
de7fef4b 3956 /* Ignore allocation errors and don't take another ref if the link was already dirty */
84de38c5 3957 return;
84de38c5
TG		 3958 link_ref(link);
3959}
3960
3961/* The serialized state in /run is up-to-date */
3962void link_clean(Link *link) {
3963 assert(link);
3964 assert(link->manager);
3965
1046bf9b 3966 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 3967}
3968
c2a65950
YW		 3969int link_save_and_clean(Link *link) {
3970 int r;
3971
3972 r = link_save(link);
3973 if (r < 0)
3974 return r;
3975
3976 link_clean(link);
3977 return 0;
3978}
3979
fe8db0c5 3980static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3981 [LINK_STATE_PENDING] = "pending",
bd08ce56 3982 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 3983 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 3984 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3985 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3986 [LINK_STATE_FAILED] = "failed",
370e9930 3987 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3988};
3989
3990DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
5ecb131d
YW		 3991
3992int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg) {
3993 const char *err_msg = NULL;
3994
3995 (void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg);
d157714b
YW		 3996 return log_link_full_errno(link, level, err,
3997 "%s: %s%s%s%m",
3998 msg,
3999 strempty(err_msg),
4000 err_msg && !endswith(err_msg, ".") ? "." : "",
4001 err_msg ? " " : "");
5ecb131d 4002}
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