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network: introduce network_verify_mdb_entries()
[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"
1e7a0e21 35#include "networkd-ndisc.h"
e4a71bf3 36#include "networkd-neighbor.h"
75156ccb 37#include "networkd-nexthop.h"
518cd6b5 38#include "networkd-sriov.h"
7465dd22 39#include "networkd-radv.h"
bce67bbe 40#include "networkd-routing-policy-rule.h"
8d968fdd 41#include "networkd-wifi.h"
cf1d700d
TG
42#include "set.h"
43#include "socket-util.h"
bf331d87 44#include "stat-util.h"
15a5e950 45#include "stdio-util.h"
8b43440b 46#include "string-table.h"
51517f9e 47#include "strv.h"
62e021a9 48#include "sysctl-util.h"
34658df2 49#include "tc.h"
e4de7287 50#include "tmpfile-util.h"
299ad32d 51#include "udev-util.h"
cf1d700d 52#include "util.h"
737f1405 53#include "vrf.h"
fc2f9534 54
bdb9f580
YW
55uint32_t link_get_vrf_table(Link *link) {
56 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
57}
58
59uint32_t link_get_dhcp_route_table(Link *link) {
60 /* When the interface is part of an VRF use the VRFs routing table, unless
61 * another table is explicitly specified. */
62 if (link->network->dhcp_route_table_set)
63 return link->network->dhcp_route_table;
64 return link_get_vrf_table(link);
65}
66
67uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
68 if (link->network->ipv6_accept_ra_route_table_set)
69 return link->network->ipv6_accept_ra_route_table;
70 return link_get_vrf_table(link);
71}
72
f24648a6
YW
73DUID* link_get_duid(Link *link) {
74 if (link->network->duid.type != _DUID_TYPE_INVALID)
75 return &link->network->duid;
76 else
77 return &link->manager->duid;
78}
79
b9d74c40
LP
80static bool link_dhcp6_enabled(Link *link) {
81 assert(link);
82
fa709992
LP
83 if (!socket_ipv6_is_supported())
84 return false;
85
78c958f8
TG
86 if (link->flags & IFF_LOOPBACK)
87 return false;
88
89 if (!link->network)
90 return false;
91
f2bfcdb9
YW
92 if (link->network->bond)
93 return false;
94
500b96eb 95 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW
96 return false;
97
e0ee46f2 98 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG
99}
100
b9d74c40
LP
101static bool link_dhcp4_enabled(Link *link) {
102 assert(link);
103
78c958f8
TG
104 if (link->flags & IFF_LOOPBACK)
105 return false;
106
107 if (!link->network)
108 return false;
109
f2bfcdb9
YW
110 if (link->network->bond)
111 return false;
112
500b96eb 113 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW
114 return false;
115
e0ee46f2 116 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG
117}
118
b9d74c40
LP
119static bool link_dhcp4_server_enabled(Link *link) {
120 assert(link);
121
78c958f8
TG
122 if (link->flags & IFF_LOOPBACK)
123 return false;
124
125 if (!link->network)
126 return false;
127
f2bfcdb9
YW
128 if (link->network->bond)
129 return false;
130
500b96eb 131 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW
132 return false;
133
78c958f8
TG
134 return link->network->dhcp_server;
135}
136
2d792895 137bool link_ipv4ll_enabled(Link *link, AddressFamily mask) {
b9d74c40 138 assert(link);
910feb78 139 assert((mask & ~(ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) == 0);
b9d74c40 140
78c958f8
TG
141 if (link->flags & IFF_LOOPBACK)
142 return false;
143
144 if (!link->network)
145 return false;
146
500b96eb 147 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW
148 return false;
149
98d20a17 150 if (STRPTR_IN_SET(link->kind,
151 "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
b0486c73 152 "vti6", "nlmon", "xfrm", "bareudp"))
a8f5bba6
JD
153 return false;
154
f410d463
YW
155 /* L3 or L3S mode do not support ARP. */
156 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
157 return false;
158
f2bfcdb9
YW
159 if (link->network->bond)
160 return false;
161
910feb78 162 return link->network->link_local & mask;
8bc17bb3
SS
163}
164
b9d74c40
LP
165static bool link_ipv6ll_enabled(Link *link) {
166 assert(link);
167
fa709992
LP
168 if (!socket_ipv6_is_supported())
169 return false;
170
d0d6a4cd
TG
171 if (link->flags & IFF_LOOPBACK)
172 return false;
173
174 if (!link->network)
175 return false;
176
500b96eb 177 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW
178 return false;
179
180 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon"))
a8f5bba6
JD
181 return false;
182
f2bfcdb9
YW
183 if (link->network->bond)
184 return false;
185
e0ee46f2 186 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG
187}
188
439689c6
SS
189static bool link_ipv6_enabled(Link *link) {
190 assert(link);
191
192 if (!socket_ipv6_is_supported())
193 return false;
194
b102cdca 195 if (link->network->bond)
2b00a4e0
TY
196 return false;
197
500b96eb 198 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW
199 return false;
200
4cef7fe3 201 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
adfeee49
YW
202 if (link_ipv6ll_enabled(link))
203 return true;
204
205 if (network_has_static_ipv6_configurations(link->network))
206 return true;
207
208 return false;
439689c6
SS
209}
210
7465dd22
PF
211static bool link_radv_enabled(Link *link) {
212 assert(link);
213
214 if (!link_ipv6ll_enabled(link))
215 return false;
216
55a7c78b 217 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF
218}
219
769d324c 220static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP
221 assert(link);
222
5a8bcb67
LP
223 if (link->flags & IFF_LOOPBACK)
224 return false;
225
226 if (!link->network)
227 return false;
228
2d792895 229 if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
765afd5c
LP
230 return false;
231
e0ee46f2 232 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP
233}
234
235static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 236 assert(link);
765afd5c
LP
237
238 if (!socket_ipv6_is_supported())
239 return false;
240
769d324c
LP
241 if (link->flags & IFF_LOOPBACK)
242 return false;
243
244 if (!link->network)
245 return false;
246
2d792895 247 if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
765afd5c
LP
248 return false;
249
e0ee46f2 250 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP
251}
252
23d8b221
SS
253static bool link_proxy_arp_enabled(Link *link) {
254 assert(link);
255
256 if (link->flags & IFF_LOOPBACK)
257 return false;
258
259 if (!link->network)
260 return false;
261
262 if (link->network->proxy_arp < 0)
263 return false;
264
265 return true;
266}
267
b9d74c40
LP
268static bool link_ipv6_accept_ra_enabled(Link *link) {
269 assert(link);
270
fa709992
LP
271 if (!socket_ipv6_is_supported())
272 return false;
273
f5a8c43f
TG
274 if (link->flags & IFF_LOOPBACK)
275 return false;
276
277 if (!link->network)
278 return false;
279
702c979f
SS
280 if (!link_ipv6ll_enabled(link))
281 return false;
282
f5a8c43f
TG
283 /* If unset use system default (enabled if local forwarding is disabled.
284 * disabled if local forwarding is enabled).
285 * If set, ignore or enforce RA independent of local forwarding state.
286 */
287 if (link->network->ipv6_accept_ra < 0)
288 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
289 return !link_ipv6_forward_enabled(link);
290 else if (link->network->ipv6_accept_ra > 0)
291 /* accept RA even if ip_forward is enabled */
292 return true;
293 else
294 /* ignore RA */
295 return false;
296}
297
1f0d9695 298static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 299 assert(link);
d68e2e59
LP
300
301 if (!socket_ipv6_is_supported())
302 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
303
49092e22 304 if (link->flags & IFF_LOOPBACK)
1f0d9695 305 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS
306
307 if (!link->network)
1f0d9695 308 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS
309
310 return link->network->ipv6_privacy_extensions;
311}
312
57ad7607 313static int link_update_ipv6_sysctl(Link *link) {
482efedc 314 bool enabled;
439689c6
SS
315 int r;
316
317 if (link->flags & IFF_LOOPBACK)
318 return 0;
319
482efedc
SS
320 enabled = link_ipv6_enabled(link);
321 if (enabled) {
322 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", false);
323 if (r < 0)
57ad7607
ZJS
324 return log_link_warning_errno(link, r, "Cannot enable IPv6: %m");
325
326 log_link_info(link, "IPv6 successfully enabled");
482efedc 327 }
439689c6
SS
328
329 return 0;
330}
331
34bf3c00
YW
332static bool link_is_enslaved(Link *link) {
333 if (link->flags & IFF_SLAVE)
334 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
335 return true;
336
34bf3c00
YW
337 if (!link->network)
338 return false;
339
bb262ef0 340 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW
341 return true;
342
bb262ef0
YW
343 /* TODO: add conditions for other netdevs. */
344
34bf3c00
YW
345 return false;
346}
347
45e11abf
YW
348static void link_update_master_operstate(Link *link, NetDev *netdev) {
349 Link *master;
350
351 if (!netdev)
352 return;
353
7936917e
YW
354 if (netdev->ifindex <= 0)
355 return;
356
45e11abf
YW
357 if (link_get(link->manager, netdev->ifindex, &master) < 0)
358 return;
359
360 link_update_operstate(master, true);
361}
362
363void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 364 LinkOperationalState operstate;
1678fbb3
YW
365 LinkCarrierState carrier_state;
366 LinkAddressState address_state;
35c5a9ca 367 _cleanup_strv_free_ char **p = NULL;
1678fbb3 368 uint8_t scope = RT_SCOPE_NOWHERE;
35c5a9ca 369 bool changed = false;
1678fbb3 370 Address *address;
14153d1b 371
84de38c5
TG
372 assert(link);
373
374 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 375 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 376 else if (link_has_carrier(link)) {
1678fbb3
YW
377 if (link_is_enslaved(link))
378 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 379 else
1678fbb3 380 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 381 } else if (link->flags & IFF_UP)
1678fbb3 382 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 383 else
1678fbb3 384 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 385
1678fbb3 386 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW
387 Link *slave;
388
90e74a66 389 SET_FOREACH(slave, link->slaves) {
959f65d3 390 link_update_operstate(slave, false);
84de38c5 391
1678fbb3
YW
392 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
393 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 394 }
959f65d3 395 }
84de38c5 396
90e74a66 397 SET_FOREACH(address, link->addresses) {
1678fbb3
YW
398 if (!address_is_ready(address))
399 continue;
84de38c5 400
1678fbb3
YW
401 if (address->scope < scope)
402 scope = address->scope;
403 }
84de38c5 404
1678fbb3 405 /* for operstate we also take foreign addresses into account */
90e74a66 406 SET_FOREACH(address, link->addresses_foreign) {
1678fbb3
YW
407 if (!address_is_ready(address))
408 continue;
409
410 if (address->scope < scope)
411 scope = address->scope;
412 }
413
414 if (scope < RT_SCOPE_SITE)
415 /* universally accessible addresses found */
416 address_state = LINK_ADDRESS_STATE_ROUTABLE;
417 else if (scope < RT_SCOPE_HOST)
418 /* only link or site local addresses found */
419 address_state = LINK_ADDRESS_STATE_DEGRADED;
84de38c5 420 else
1678fbb3
YW
421 /* no useful addresses found */
422 address_state = LINK_ADDRESS_STATE_OFF;
423
424 /* Mapping of address and carrier state vs operational state
425 * carrier state
426 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
427 * ------------------------------------------------------------------------------
428 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
429 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
430 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
431 */
84de38c5 432
1678fbb3
YW
433 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
434 operstate = (LinkOperationalState) carrier_state;
435 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
436 operstate = LINK_OPERSTATE_ROUTABLE;
437 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
438 operstate = LINK_OPERSTATE_DEGRADED;
439 else
14153d1b
YW
440 operstate = LINK_OPERSTATE_ENSLAVED;
441
35c5a9ca
YW
442 if (link->carrier_state != carrier_state) {
443 link->carrier_state = carrier_state;
444 changed = true;
445 if (strv_extend(&p, "CarrierState") < 0)
446 log_oom();
447 }
959f65d3 448
35c5a9ca
YW
449 if (link->address_state != address_state) {
450 link->address_state = address_state;
451 changed = true;
452 if (strv_extend(&p, "AddressState") < 0)
453 log_oom();
959f65d3
YW
454 }
455
84de38c5
TG
456 if (link->operstate != operstate) {
457 link->operstate = operstate;
35c5a9ca
YW
458 changed = true;
459 if (strv_extend(&p, "OperationalState") < 0)
460 log_oom();
84de38c5 461 }
959f65d3 462
35c5a9ca
YW
463 if (p)
464 link_send_changed_strv(link, p);
465 if (changed)
466 link_dirty(link);
467
45e11abf
YW
468 if (also_update_master && link->network) {
469 link_update_master_operstate(link, link->network->bond);
470 link_update_master_operstate(link, link->network->bridge);
959f65d3 471 }
84de38c5
TG
472}
473
51d18171
TG
474#define FLAG_STRING(string, flag, old, new) \
475 (((old ^ new) & flag) \
476 ? ((old & flag) ? (" -" string) : (" +" string)) \
477 : "")
478
bb262ef0 479static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG
480 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
481 uint8_t operstate;
482 int r;
483
484 assert(link);
485
486 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP
487 if (r < 0)
488 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 489
1c4baffc 490 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG
491 if (r < 0)
492 /* if we got a message without operstate, take it to mean
493 the state was unchanged */
494 operstate = link->kernel_operstate;
495
bb262ef0 496 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG
497 return 0;
498
499 if (link->flags != flags) {
6a7a4e4d 500 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
501 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
502 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
503 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
504 FLAG_STRING("UP", IFF_UP, link->flags, flags),
505 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
506 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
507 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
508 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
509 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
510 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
511 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
512 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
513 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
514 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
515 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
516 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
517 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
518 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
519 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
520
521 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
522 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
523 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
524 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
525 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
526 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
527 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
528 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
529
530 /* link flags are currently at most 18 bits, let's align to
531 * printing 20 */
532 if (unknown_flags_added)
79008bdd 533 log_link_debug(link,
6a7a4e4d 534 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG
535 unknown_flags_added);
536
537 if (unknown_flags_removed)
79008bdd 538 log_link_debug(link,
6a7a4e4d 539 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG
540 unknown_flags_removed);
541 }
542
543 link->flags = flags;
544 link->kernel_operstate = operstate;
545
959f65d3 546 link_update_operstate(link, true);
51d18171
TG
547
548 return 0;
549}
550
1c4baffc 551static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 552 _cleanup_(link_unrefp) Link *link = NULL;
6cad256d 553 const char *ifname, *kind = NULL;
b710e6b6 554 unsigned short iftype;
572b21d9
YW
555 int r, ifindex;
556 uint16_t type;
f579559b 557
0c2f9b84 558 assert(manager);
505f8da7 559 assert(message);
f579559b
TG
560 assert(ret);
561
6cad256d
TJ
562 /* check for link kind */
563 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
564 if (r == 0) {
db2f8a2e 565 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ
566 r = sd_netlink_message_exit_container(message);
567 if (r < 0)
568 return r;
569 }
570
1c4baffc 571 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG
572 if (r < 0)
573 return r;
574 else if (type != RTM_NEWLINK)
575 return -EINVAL;
576
577 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
578 if (r < 0)
579 return r;
580 else if (ifindex <= 0)
581 return -EINVAL;
582
b710e6b6
LP
583 r = sd_rtnl_message_link_get_type(message, &iftype);
584 if (r < 0)
585 return r;
586
1c4baffc 587 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG
588 if (r < 0)
589 return r;
590
17f9c355 591 link = new(Link, 1);
f579559b
TG
592 if (!link)
593 return -ENOMEM;
594
17f9c355
YW
595 *link = (Link) {
596 .n_ref = 1,
597 .manager = manager,
598 .state = LINK_STATE_PENDING,
17f9c355
YW
599 .ifindex = ifindex,
600 .iftype = iftype,
15761549
YW
601
602 .n_dns = (unsigned) -1,
603 .dns_default_route = -1,
604 .llmnr = _RESOLVE_SUPPORT_INVALID,
605 .mdns = _RESOLVE_SUPPORT_INVALID,
606 .dnssec_mode = _DNSSEC_MODE_INVALID,
607 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
17f9c355
YW
608 };
609
505f8da7
TG
610 link->ifname = strdup(ifname);
611 if (!link->ifname)
612 return -ENOMEM;
f579559b 613
6cad256d
TJ
614 if (kind) {
615 link->kind = strdup(kind);
616 if (!link->kind)
617 return -ENOMEM;
618 }
619
cbff7170
TJ
620 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
621 if (r < 0)
622 log_link_debug_errno(link, r, "New device has no master, continuing without");
623
1c4baffc 624 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 625 if (r < 0)
34437b4f 626 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 627
c643bda5 628 r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac);
4bb7cc82
YW
629 if (r < 0)
630 log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
631
c643bda5
YW
632 r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver);
633 if (r < 0)
634 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
635
572b21d9
YW
636 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &link->alternative_names);
637 if (r < 0 && r != -ENODATA)
638 return r;
639
34437b4f 640 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 641 return -ENOMEM;
fe8db0c5 642
34437b4f 643 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG
644 return -ENOMEM;
645
34437b4f 646 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS
647 return -ENOMEM;
648
d5099efc 649 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG
650 if (r < 0)
651 return r;
652
653 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG
654 if (r < 0)
655 return r;
656
bb262ef0 657 r = link_update_flags(link, message, false);
51d18171
TG
658 if (r < 0)
659 return r;
660
1cc6c93a 661 *ret = TAKE_PTR(link);
f579559b
TG
662
663 return 0;
664}
665
15761549
YW
666void link_ntp_settings_clear(Link *link) {
667 link->ntp = strv_free(link->ntp);
668}
669
670void link_dns_settings_clear(Link *link) {
e77bd3fd
YW
671 if (link->n_dns != (unsigned) -1)
672 for (unsigned i = 0; i < link->n_dns; i++)
673 in_addr_full_free(link->dns[i]);
15761549
YW
674 link->dns = mfree(link->dns);
675 link->n_dns = (unsigned) -1;
676
677 link->search_domains = ordered_set_free_free(link->search_domains);
678 link->route_domains = ordered_set_free_free(link->route_domains);
679
680 link->dns_default_route = -1;
681 link->llmnr = _RESOLVE_SUPPORT_INVALID;
682 link->mdns = _RESOLVE_SUPPORT_INVALID;
683 link->dnssec_mode = _DNSSEC_MODE_INVALID;
684 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
685
686 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
687}
688
1a6bb31f
YW
689static void link_free_engines(Link *link) {
690 if (!link)
691 return;
692
693 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
694 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
695 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
1a6bb31f
YW
696
697 link->lldp = sd_lldp_unref(link->lldp);
698
699 ndisc_flush(link);
700
701 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
702 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 703 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
1a6bb31f
YW
704 link->ndisc = sd_ndisc_unref(link->ndisc);
705 link->radv = sd_radv_unref(link->radv);
706}
707
8301aa0b 708static Link *link_free(Link *link) {
428fd0a7
TG
709 Address *address;
710
8301aa0b 711 assert(link);
f579559b 712
15761549
YW
713 link_ntp_settings_clear(link);
714 link_dns_settings_clear(link);
715
8eec0b9d
YW
716 link->routes = set_free(link->routes);
717 link->routes_foreign = set_free(link->routes_foreign);
6e537f62
YW
718 link->dhcp_routes = set_free(link->dhcp_routes);
719 link->dhcp_routes_old = set_free(link->dhcp_routes_old);
1633c457
YW
720 link->dhcp6_routes = set_free(link->dhcp6_routes);
721 link->dhcp6_routes_old = set_free(link->dhcp6_routes_old);
722 link->dhcp6_pd_routes = set_free(link->dhcp6_pd_routes);
723 link->dhcp6_pd_routes_old = set_free(link->dhcp6_pd_routes_old);
69203fba 724 link->ndisc_routes = set_free(link->ndisc_routes);
adda1ed9 725
8eec0b9d
YW
726 link->nexthops = set_free(link->nexthops);
727 link->nexthops_foreign = set_free(link->nexthops_foreign);
c16c7808 728
8eec0b9d
YW
729 link->neighbors = set_free(link->neighbors);
730 link->neighbors_foreign = set_free(link->neighbors_foreign);
d1bdafd2 731
8eec0b9d
YW
732 link->addresses = set_free(link->addresses);
733 link->addresses_foreign = set_free(link->addresses_foreign);
e5526518 734 link->static_addresses = set_free(link->static_addresses);
1633c457
YW
735 link->dhcp6_addresses = set_free(link->dhcp6_addresses);
736 link->dhcp6_addresses_old = set_free(link->dhcp6_addresses_old);
737 link->dhcp6_pd_addresses = set_free(link->dhcp6_pd_addresses);
738 link->dhcp6_pd_addresses_old = set_free(link->dhcp6_pd_addresses_old);
69203fba 739 link->ndisc_addresses = set_free(link->ndisc_addresses);
adda1ed9 740
11bf3cce
LP
741 while ((address = link->pool_addresses)) {
742 LIST_REMOVE(addresses, link->pool_addresses, address);
743 address_free(address);
744 }
745
7272b25e 746 link_lldp_emit_stop(link);
1a6bb31f 747 link_free_engines(link);
68a8723c 748 free(link->lease_file);
49699bac
SS
749 free(link->lldp_file);
750
c166a070 751 free(link->ifname);
572b21d9 752 strv_free(link->alternative_names);
ceac4078 753 free(link->kind);
8d968fdd 754 free(link->ssid);
c643bda5 755 free(link->driver);
6cad256d 756
db2f8a2e 757 (void) unlink(link->state_file);
fe8db0c5 758 free(link->state_file);
c166a070 759
51517f9e 760 sd_device_unref(link->sd_device);
b5db00e5 761
0d4ad91d 762 hashmap_free(link->bound_to_links);
0d4ad91d
AR
763 hashmap_free(link->bound_by_links);
764
5f707e12 765 set_free_with_destructor(link->slaves, link_unref);
033295c1 766
c9c908a6
YW
767 network_unref(link->network);
768
8301aa0b 769 return mfree(link);
14b746f7
TG
770}
771
8301aa0b 772DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 773
11a7f229
TG
774int link_get(Manager *m, int ifindex, Link **ret) {
775 Link *link;
11a7f229
TG
776
777 assert(m);
e856ed00 778 assert(ifindex > 0);
11a7f229
TG
779 assert(ret);
780
ae06ab10 781 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG
782 if (!link)
783 return -ENODEV;
784
785 *ret = link;
786
787 return 0;
788}
789
af9ba57a 790void link_set_state(Link *link, LinkState state) {
e331e246
TG
791 assert(link);
792
793 if (link->state == state)
794 return;
795
0beb9542
YW
796 log_link_debug(link, "State changed: %s -> %s",
797 link_state_to_string(link->state),
798 link_state_to_string(state));
799
e331e246
TG
800 link->state = state;
801
802 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG
803}
804
57bd6899
TG
805static void link_enter_unmanaged(Link *link) {
806 assert(link);
807
e331e246 808 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 809
84de38c5 810 link_dirty(link);
57bd6899
TG
811}
812
95355a28 813int link_stop_clients(Link *link, bool may_keep_dhcp) {
111bb8f9 814 int r = 0, k;
051e77ca 815 Address *ad;
111bb8f9
TG
816
817 assert(link);
818 assert(link->manager);
819 assert(link->manager->event);
820
80060352
ZJS
821 bool keep_dhcp = may_keep_dhcp &&
822 link->network &&
823 (link->manager->restarting ||
824 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
825
826 if (link->dhcp_client && !keep_dhcp) {
111bb8f9 827 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 828 if (k < 0)
36c7d709 829 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG
830 }
831
ba179154 832 if (link->ipv4ll) {
111bb8f9 833 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 834 if (k < 0)
36c7d709 835 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG
836 }
837
051e77ca
SS
838 if (link->network)
839 LIST_FOREACH(addresses, ad, link->network->static_addresses)
840 if (ad->acd && sd_ipv4acd_is_running(ad->acd) == 0) {
841 k = sd_ipv4acd_stop(ad->acd);
842 if (k < 0)
843 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
844 }
845
f5a8c43f
TG
846 if (link->dhcp6_client) {
847 k = sd_dhcp6_client_stop(link->dhcp6_client);
848 if (k < 0)
36c7d709 849 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 850 }
4138fb2c 851
1633c457
YW
852 if (link_dhcp6_pd_is_enabled(link)) {
853 k = dhcp6_pd_remove(link);
854 if (k < 0)
855 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
856 }
857
1e7a0e21
LP
858 if (link->ndisc) {
859 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 860 if (k < 0)
36c7d709 861 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF
862 }
863
7465dd22 864 if (link->radv) {
290696e5 865 k = sd_radv_stop(link->radv);
7465dd22
PF
866 if (k < 0)
867 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
868 }
869
7272b25e 870 link_lldp_emit_stop(link);
111bb8f9
TG
871 return r;
872}
873
b22d8a00 874void link_enter_failed(Link *link) {
ef1ba606 875 assert(link);
f882c247 876
370e9930 877 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG
878 return;
879
6a7a4e4d 880 log_link_warning(link, "Failed");
449f7554 881
e331e246 882 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 883
95355a28 884 link_stop_clients(link, false);
111bb8f9 885
84de38c5 886 link_dirty(link);
f882c247
TG
887}
888
7033af49
YW
889static int link_join_netdevs_after_configured(Link *link) {
890 NetDev *netdev;
7033af49
YW
891 int r;
892
90e74a66 893 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7033af49
YW
894 if (netdev->ifindex > 0)
895 /* Assume already enslaved. */
896 continue;
897
898 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
899 continue;
900
901 log_struct(LOG_DEBUG,
902 LOG_LINK_INTERFACE(link),
903 LOG_NETDEV_INTERFACE(netdev),
904 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
905
906 r = netdev_join(netdev, link, NULL);
907 if (r < 0)
908 return log_struct_errno(LOG_WARNING, r,
909 LOG_LINK_INTERFACE(link),
910 LOG_NETDEV_INTERFACE(netdev),
911 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
912 }
913
914 return 0;
915}
916
e3a7b048 917static void link_enter_configured(Link *link) {
dd43110f
TG
918 assert(link);
919 assert(link->network);
e3a7b048 920
289e6774 921 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 922 return;
dd43110f 923
e331e246 924 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 925
7033af49
YW
926 (void) link_join_netdevs_after_configured(link);
927
84de38c5 928 link_dirty(link);
dd43110f
TG
929}
930
302a796f 931static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG
932 int r;
933
1046bf9b 934 assert(link);
7715629e 935 assert(link->route_messages > 0);
289e6774
WKI
936 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
937 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 938
7715629e 939 link->route_messages--;
f882c247 940
77a008c0 941 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG
942 return 1;
943
1c4baffc 944 r = sd_netlink_message_get_errno(m);
4ff296b0 945 if (r < 0 && r != -EEXIST) {
5ecb131d 946 log_link_message_warning_errno(link, m, r, "Could not set route");
4ff296b0
YW
947 link_enter_failed(link);
948 return 1;
949 }
f882c247 950
7715629e 951 if (link->route_messages == 0) {
6a7a4e4d 952 log_link_debug(link, "Routes set");
7715629e 953 link->static_routes_configured = true;
c133770a 954 link_set_nexthop(link);
dd3efc09 955 }
f882c247
TG
956
957 return 1;
958}
959
b5799eeb 960int link_request_set_routes(Link *link) {
bf61b05a
LP
961 enum {
962 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
963 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
964 _PHASE_MAX
965 } phase;
a6cc569e 966 Route *rt;
f882c247
TG
967 int r;
968
969 assert(link);
970 assert(link->network);
289e6774 971 assert(link->state != _LINK_STATE_INVALID);
f882c247 972
2428613f 973 link->static_routes_configured = false;
27c34f73 974
e5526518
YW
975 if (!link->addresses_ready)
976 return 0;
977
4e2ef9d9
YW
978 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
979 /* During configuring addresses, the link lost its carrier. As networkd is dropping
980 * the addresses now, let's not configure the routes either. */
981 return 0;
982
c0ec4746 983 r = link_set_routing_policy_rules(link);
f3ef324d
YW
984 if (r < 0)
985 return r;
f882c247 986
bf61b05a
LP
987 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
988 for (phase = 0; phase < _PHASE_MAX; phase++)
989 LIST_FOREACH(routes, rt, link->network->static_routes) {
1985c54f
YW
990 if (rt->gateway_from_dhcp)
991 continue;
0d34228f 992
6ff5cc6b 993 if ((in_addr_is_null(rt->family, &rt->gw) && ordered_set_isempty(rt->multipath_routes)) != (phase == PHASE_NON_GATEWAY))
bf61b05a 994 continue;
a6cc569e 995
80b0e860 996 r = route_configure(rt, link, route_handler, NULL);
4ff296b0
YW
997 if (r < 0)
998 return log_link_warning_errno(link, r, "Could not set routes: %m");
c4423317
YW
999 if (r > 0)
1000 link->route_messages++;
0d34228f 1001 }
f5be5601 1002
7715629e
ST
1003 if (link->route_messages == 0) {
1004 link->static_routes_configured = true;
c133770a 1005 link_set_nexthop(link);
b425c3ae 1006 } else {
6a7a4e4d 1007 log_link_debug(link, "Setting routes");
b425c3ae
YW
1008 link_set_state(link, LINK_STATE_CONFIGURING);
1009 }
f882c247
TG
1010
1011 return 0;
1012}
1013
6accfd31
DA
1014void link_check_ready(Link *link) {
1015 Address *a;
6accfd31
DA
1016
1017 assert(link);
1018
5f58af25
YW
1019 if (link->state == LINK_STATE_CONFIGURED)
1020 return;
1021
1022 if (link->state != LINK_STATE_CONFIGURING) {
1023 log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31 1024 return;
39373cb9 1025 }
6accfd31
DA
1026
1027 if (!link->network)
1028 return;
1029
39373cb9
YW
1030 if (!link->addresses_configured) {
1031 log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 1032 return;
39373cb9 1033 }
6accfd31 1034
39373cb9
YW
1035 if (!link->neighbors_configured) {
1036 log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
6accfd31 1037 return;
39373cb9 1038 }
6accfd31 1039
90e74a66 1040 SET_FOREACH(a, link->addresses)
39373cb9
YW
1041 if (!address_is_ready(a)) {
1042 _cleanup_free_ char *str = NULL;
1043
1044 (void) in_addr_to_string(a->family, &a->in_addr, &str);
1045 log_link_debug(link, "%s(): an address %s/%d is not ready.", __func__, strnull(str), a->prefixlen);
6aa5773b 1046 return;
39373cb9 1047 }
6aa5773b 1048
39373cb9
YW
1049 if (!link->static_routes_configured) {
1050 log_link_debug(link, "%s(): static routes are not configured.", __func__);
6accfd31 1051 return;
39373cb9 1052 }
6accfd31 1053
39373cb9
YW
1054 if (!link->static_nexthops_configured) {
1055 log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 1056 return;
39373cb9 1057 }
c16c7808 1058
39373cb9
YW
1059 if (!link->routing_policy_rules_configured) {
1060 log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 1061 return;
39373cb9 1062 }
6accfd31 1063
39373cb9
YW
1064 if (!link->tc_configured) {
1065 log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
4ecdcb07 1066 return;
39373cb9 1067 }
4ecdcb07 1068
39373cb9
YW
1069 if (!link->sr_iov_configured) {
1070 log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 1071 return;
39373cb9 1072 }
518cd6b5 1073
1f241589
YW
1074 if (!link->bridge_mdb_configured) {
1075 log_link_debug(link, "%s(): Bridge MDB is not configured.", __func__);
1076 return;
1077 }
1078
463797c1 1079 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
50550722
YW
1080 bool has_ndisc_address = false;
1081 NDiscAddress *n;
6accfd31 1082
1c09d84e 1083 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !link->ipv4ll_address_configured) {
39373cb9 1084 log_link_debug(link, "%s(): IPv4LL is not configured.", __func__);
463797c1 1085 return;
39373cb9 1086 }
6accfd31 1087
463797c1 1088 if (link_ipv6ll_enabled(link) &&
39373cb9
YW
1089 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
1090 log_link_debug(link, "%s(): IPv6LL is not configured.", __func__);
463797c1 1091 return;
39373cb9 1092 }
6accfd31 1093
90e74a66 1094 SET_FOREACH(n, link->ndisc_addresses)
50550722
YW
1095 if (!n->marked) {
1096 has_ndisc_address = true;
1097 break;
1098 }
1099
15797d6a 1100 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
50550722 1101 !link->dhcp_address && set_isempty(link->dhcp6_addresses) && !has_ndisc_address &&
15797d6a
YW
1102 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
1103 log_link_debug(link, "%s(): DHCP4 or DHCP6 is enabled but no dynamic address is assigned yet.", __func__);
659ad3a0
YW
1104 return;
1105 }
1106
1633c457 1107 if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_dhcp6_pd_is_enabled(link) || link_ipv6_accept_ra_enabled(link)) {
39373cb9
YW
1108 if (!link->dhcp4_configured &&
1109 !(link->dhcp6_address_configured && link->dhcp6_route_configured) &&
1110 !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) &&
d98c546d 1111 !(link->ndisc_addresses_configured && link->ndisc_routes_configured) &&
1c09d84e 1112 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
39373cb9
YW
1113 /* When DHCP or RA is enabled, at least one protocol must provide an address, or
1114 * an IPv4ll fallback address must be configured. */
1115 log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
1116 return;
1117 }
1118
d98c546d 1119 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
1120 __func__,
1121 yes_no(link->dhcp4_configured),
1122 yes_no(link->dhcp6_address_configured),
1123 yes_no(link->dhcp6_route_configured),
1124 yes_no(link->dhcp6_pd_address_configured),
1125 yes_no(link->dhcp6_pd_route_configured),
d98c546d
YW
1126 yes_no(link->ndisc_addresses_configured),
1127 yes_no(link->ndisc_routes_configured));
39373cb9 1128 }
463797c1 1129 }
6accfd31 1130
5f58af25 1131 link_enter_configured(link);
6accfd31
DA
1132
1133 return;
1134}
1135
e5526518
YW
1136static int static_address_ready_callback(Address *address) {
1137 Address *a;
e5526518
YW
1138 Link *link;
1139
1140 assert(address);
1141 assert(address->link);
1142
1143 link = address->link;
1144
1145 if (!link->addresses_configured)
1146 return 0;
1147
90e74a66 1148 SET_FOREACH(a, link->static_addresses)
e5526518
YW
1149 if (!address_is_ready(a)) {
1150 _cleanup_free_ char *str = NULL;
1151
1152 (void) in_addr_to_string(a->family, &a->in_addr, &str);
1153 log_link_debug(link, "an address %s/%u is not ready", strnull(str), a->prefixlen);
1154 return 0;
1155 }
1156
1157 /* This should not be called again */
90e74a66 1158 SET_FOREACH(a, link->static_addresses)
e5526518
YW
1159 a->callback = NULL;
1160
1161 link->addresses_ready = true;
1162
1163 return link_request_set_routes(link);
1164}
1165
3650173f 1166static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG
1167 int r;
1168
4958aee4 1169 assert(rtnl);
f5be5601
TG
1170 assert(m);
1171 assert(link);
1172 assert(link->ifname);
7715629e 1173 assert(link->address_messages > 0);
289e6774 1174 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1175 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1176
7715629e 1177 link->address_messages--;
f882c247 1178
5da8149f 1179 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG
1180 return 1;
1181
1c4baffc 1182 r = sd_netlink_message_get_errno(m);
4ff296b0 1183 if (r < 0 && r != -EEXIST) {
5ecb131d 1184 log_link_message_warning_errno(link, m, r, "Could not set address");
4ff296b0
YW
1185 link_enter_failed(link);
1186 return 1;
1187 } else if (r >= 0)
1188 (void) manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1189
7715629e 1190 if (link->address_messages == 0) {
e5526518
YW
1191 Address *a;
1192
6a7a4e4d 1193 log_link_debug(link, "Addresses set");
c42ff3a1 1194 link->addresses_configured = true;
e5526518
YW
1195
1196 /* When all static addresses are already ready, then static_address_ready_callback()
1197 * will not be called automatically. So, call it here. */
1198 a = set_first(link->static_addresses);
1199 if (!a) {
1200 log_link_warning(link, "No static address is stored.");
1201 link_enter_failed(link);
1202 return 1;
1203 }
1204 if (!a->callback) {
1205 log_link_warning(link, "Address ready callback is not set.");
1206 link_enter_failed(link);
1207 return 1;
1208 }
1209 r = a->callback(a);
1210 if (r < 0)
1211 link_enter_failed(link);
dd3efc09 1212 }
f882c247
TG
1213
1214 return 1;
1215}
1216
e5526518
YW
1217static int static_address_configure(Address *address, Link *link, bool update) {
1218 Address *ret;
197e2809 1219 int r;
f6bb7ac5 1220
e5526518
YW
1221 assert(address);
1222 assert(link);
1223
1224 r = address_configure(address, link, address_handler, update, &ret);
1225 if (r < 0)
1226 return log_link_warning_errno(link, r, "Could not configure static address: %m");
1227
1228 link->address_messages++;
1229
1230 r = set_ensure_put(&link->static_addresses, &address_hash_ops, ret);
1231 if (r < 0)
1232 return log_link_warning_errno(link, r, "Failed to store static address: %m");
1233
1234 ret->callback = static_address_ready_callback;
f6bb7ac5 1235
197e2809 1236 return 0;
f6bb7ac5
TJ
1237}
1238
289e6774 1239static int link_request_set_addresses(Link *link) {
a6cc569e 1240 Address *ad;
bd6379ec 1241 Prefix *p;
f882c247
TG
1242 int r;
1243
1244 assert(link);
1245 assert(link->network);
f5be5601 1246 assert(link->state != _LINK_STATE_INVALID);
f882c247 1247
9b966cee
YW
1248 if (link->address_remove_messages != 0) {
1249 log_link_debug(link, "Removing old addresses, new addresses will be configured later.");
1250 link->request_static_addresses = true;
1251 return 0;
1252 }
1253
2428613f 1254 /* Reset all *_configured flags we are configuring. */
9b966cee 1255 link->request_static_addresses = false;
2428613f 1256 link->addresses_configured = false;
6aa5773b 1257 link->addresses_ready = false;
2428613f
YW
1258 link->neighbors_configured = false;
1259 link->static_routes_configured = false;
c16c7808 1260 link->static_nexthops_configured = false;
2428613f
YW
1261 link->routing_policy_rules_configured = false;
1262
f6bb7ac5
TJ
1263 r = link_set_bridge_fdb(link);
1264 if (r < 0)
1265 return r;
1266
1f241589
YW
1267 r = link_set_bridge_mdb(link);
1268 if (r < 0)
1269 return r;
1270
58f1fe9a 1271 r = link_set_neighbors(link);
f3ef324d
YW
1272 if (r < 0)
1273 return r;
e4a71bf3 1274
3d3d4255 1275 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW
1276 bool update;
1277
6f5d73ab
YW
1278 if (ad->family == AF_INET6 && !in_addr_is_null(ad->family, &ad->in_addr_peer))
1279 update = address_get(link, ad->family, &ad->in_addr_peer, ad->prefixlen, NULL) > 0;
1280 else
1281 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
a47a6dae 1282
e5526518 1283 r = static_address_configure(ad, link, update);
4ff296b0 1284 if (r < 0)
e5526518 1285 return r;
95b74ef6
SS
1286 }
1287
61c0ef4f 1288 if (link->network->router_prefix_delegation & RADV_PREFIX_DELEGATION_STATIC)
bd6379ec
SS
1289 LIST_FOREACH(prefixes, p, link->network->static_prefixes) {
1290 _cleanup_(address_freep) Address *address = NULL;
1291
1292 if (!p->assign)
1293 continue;
1294
1295 r = address_new(&address);
1296 if (r < 0)
e5526518 1297 return log_oom();
bd6379ec
SS
1298
1299 r = sd_radv_prefix_get_prefix(p->radv_prefix, &address->in_addr.in6, &address->prefixlen);
1300 if (r < 0)
e5526518 1301 return log_link_warning_errno(link, r, "Could not get RA prefix: %m");
bd6379ec
SS
1302
1303 r = generate_ipv6_eui_64_address(link, &address->in_addr.in6);
1304 if (r < 0)
e5526518 1305 return log_link_warning_errno(link, r, "Could not generate EUI64 address: %m");
bd6379ec
SS
1306
1307 address->family = AF_INET6;
e5526518 1308 r = static_address_configure(address, link, true);
bd6379ec 1309 if (r < 0)
e5526518 1310 return r;
bd6379ec
SS
1311 }
1312
fe2bc17c
YW
1313 r = link_set_address_labels(link);
1314 if (r < 0)
1315 return r;
f882c247 1316
e5526518 1317 /* now that we can figure out a default address for the dhcp server, start it */
708c425d 1318 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
8fcf1d61 1319 r = dhcp4_server_configure(link);
4ff296b0 1320 if (r < 0)
d4cdbea5 1321 return r;
6a7a4e4d 1322 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG
1323 }
1324
c42ff3a1
WKI
1325 if (link->address_messages == 0) {
1326 link->addresses_configured = true;
e5526518
YW
1327 link->addresses_ready = true;
1328 r = link_request_set_routes(link);
1329 if (r < 0)
1330 return r;
b425c3ae 1331 } else {
6a7a4e4d 1332 log_link_debug(link, "Setting addresses");
b425c3ae
YW
1333 link_set_state(link, LINK_STATE_CONFIGURING);
1334 }
431ca2ce 1335
f882c247
TG
1336 return 0;
1337}
1338
13b498f9 1339static int link_set_bridge_vlan(Link *link) {
86e2be7b 1340 int r;
13b498f9
TJ
1341
1342 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1343 if (r < 0)
1344 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1345
1346 return r;
1347}
1348
a60a720c 1349static int link_set_proxy_arp(Link *link) {
23d8b221
SS
1350 int r;
1351
1352 if (!link_proxy_arp_enabled(link))
1353 return 0;
1354
62e021a9 1355 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS
1356 if (r < 0)
1357 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1358
1359 return 0;
1360}
1361
3a390124 1362static int link_configure_continue(Link *link);
55dc8c4a 1363
302a796f 1364static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG
1365 int r;
1366
1367 assert(m);
1368 assert(link);
1369 assert(link->ifname);
1370
55dc8c4a
YW
1371 link->setting_mtu = false;
1372
5da8149f 1373 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG
1374 return 1;
1375
1c4baffc 1376 r = sd_netlink_message_get_errno(m);
4ff296b0 1377 if (r < 0)
5ecb131d 1378 log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring");
4ff296b0
YW
1379 else
1380 log_link_debug(link, "Setting MTU done.");
55dc8c4a 1381
4ff296b0 1382 if (link->state == LINK_STATE_INITIALIZED) {
3a390124 1383 r = link_configure_continue(link);
4ff296b0
YW
1384 if (r < 0)
1385 link_enter_failed(link);
1386 }
4f882b2a
TG
1387
1388 return 1;
1389}
1390
933c70a0 1391int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1392 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG
1393 int r;
1394
1395 assert(link);
1396 assert(link->manager);
1397 assert(link->manager->rtnl);
1398
40288ece
YW
1399 if (mtu == 0 || link->setting_mtu)
1400 return 0;
1401
933c70a0 1402 if (link->mtu == mtu)
ee493106
YW
1403 return 0;
1404
6a7a4e4d 1405 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1406
6a7a4e4d
LP
1407 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1408 if (r < 0)
1409 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1410
44b598a1 1411 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW
1412 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1413 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS
1414
1415 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
d236718c 1416 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes");
44b598a1 1417
72c2500b 1418 mtu = IPV6_MIN_MTU;
44b598a1
SS
1419 }
1420
1c4baffc 1421 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP
1422 if (r < 0)
1423 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1424
302a796f
YW
1425 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1426 link_netlink_destroy_callback, link);
6a7a4e4d
LP
1427 if (r < 0)
1428 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1429
ae941762 1430 link_ref(link);
1046bf9b 1431 link->setting_mtu = true;
b226d99b 1432
4f882b2a
TG
1433 return 0;
1434}
1435
f6fcc1c2
YW
1436static bool link_reduces_vlan_mtu(Link *link) {
1437 /* See netif_reduces_vlan_mtu() in kernel. */
1438 return streq_ptr(link->kind, "macsec");
1439}
1440
1441static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1442 uint32_t mtu = 0;
1443 NetDev *dev;
f6fcc1c2 1444
90e74a66 1445 HASHMAP_FOREACH(dev, link->network->stacked_netdevs)
f6fcc1c2
YW
1446 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1447 /* See vlan_dev_change_mtu() in kernel. */
1448 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1449
1450 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1451 /* See macvlan_change_mtu() in kernel. */
1452 mtu = dev->mtu;
1453
1454 return mtu;
1455}
1456
1457static int link_configure_mtu(Link *link) {
1458 uint32_t mtu;
1459
1460 assert(link);
1461 assert(link->network);
1462
1463 if (link->network->mtu > 0)
1464 return link_set_mtu(link, link->network->mtu);
1465
1466 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1467 if (link->mtu >= mtu)
1468 return 0;
1469
1470 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1471 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1472 link->mtu, mtu);
1473
1474 return link_set_mtu(link, mtu);
1475}
1476
302a796f 1477static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS
1478 int r;
1479
1480 assert(m);
1481 assert(link);
1482 assert(link->ifname);
1483
1484 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1485 return 1;
1486
1487 r = sd_netlink_message_get_errno(m);
1488 if (r < 0)
5ecb131d 1489 log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring");
99d2baa2
SS
1490
1491 return 1;
1492}
1493
1494static int link_set_flags(Link *link) {
1495 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1496 unsigned ifi_change = 0;
1497 unsigned ifi_flags = 0;
1498 int r;
1499
1500 assert(link);
1501 assert(link->manager);
1502 assert(link->manager->rtnl);
1503
1504 if (link->flags & IFF_LOOPBACK)
1505 return 0;
1506
1507 if (!link->network)
1508 return 0;
1509
866e6b7a 1510 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS
1511 return 0;
1512
1513 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1514 if (r < 0)
1515 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1516
1517 if (link->network->arp >= 0) {
1518 ifi_change |= IFF_NOARP;
e6ebebbe
SS
1519 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1520 }
1521
1522 if (link->network->multicast >= 0) {
1523 ifi_change |= IFF_MULTICAST;
1524 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS
1525 }
1526
866e6b7a
SS
1527 if (link->network->allmulticast >= 0) {
1528 ifi_change |= IFF_ALLMULTI;
1529 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1530 }
1531
99d2baa2
SS
1532 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1533 if (r < 0)
1534 return log_link_error_errno(link, r, "Could not set link flags: %m");
1535
302a796f
YW
1536 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1537 link_netlink_destroy_callback, link);
99d2baa2
SS
1538 if (r < 0)
1539 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1540
1541 link_ref(link);
1542
1543 return 0;
1544}
1545
e7ab854c
TG
1546static int link_acquire_ipv6_conf(Link *link) {
1547 int r;
1548
1549 assert(link);
1550
e7ab854c 1551 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1552 assert(link->ndisc);
e7ab854c
TG
1553
1554 log_link_debug(link, "Discovering IPv6 routers");
1555
1e7a0e21 1556 r = sd_ndisc_start(link->ndisc);
63348d13 1557 if (r < 0 && r != -EBUSY)
e7ab854c
TG
1558 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1559 }
1560
7465dd22
PF
1561 if (link_radv_enabled(link)) {
1562 assert(link->radv);
1563 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1564
1565 log_link_debug(link, "Starting IPv6 Router Advertisements");
1566
fd3ef936
YW
1567 r = radv_emit_dns(link);
1568 if (r < 0)
1569 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
1570
7465dd22
PF
1571 r = sd_radv_start(link->radv);
1572 if (r < 0 && r != -EBUSY)
1573 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1574 }
1575
838d39af
SS
1576 if (link_dhcp6_enabled(link) && IN_SET(link->network->dhcp6_without_ra,
1577 DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST,
1578 DHCP6_CLIENT_START_MODE_SOLICIT)) {
cd305af1
SS
1579 assert(link->dhcp6_client);
1580 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1581
838d39af 1582 r = dhcp6_request_address(link, link->network->dhcp6_without_ra == DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST);
cd305af1 1583 if (r < 0 && r != -EBUSY)
1633c457 1584 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
cd305af1
SS
1585 else
1586 log_link_debug(link, "Acquiring DHCPv6 lease");
1587 }
1588
1633c457
YW
1589 r = dhcp6_request_prefix_delegation(link);
1590 if (r < 0)
1591 return log_link_warning_errno(link, r, "Failed to request DHCPv6 prefix delegation: %m");
10752343 1592
e7ab854c
TG
1593 return 0;
1594}
1595
6fc25497 1596static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG
1597 int r;
1598
1599 assert(link);
ff254138
TG
1600 assert(link->manager);
1601 assert(link->manager->event);
1602
910feb78 1603 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1604 assert(link->ipv4ll);
ff254138 1605
6a7a4e4d 1606 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL
1607
1608 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP
1609 if (r < 0)
1610 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL
1611 }
1612
78c958f8 1613 if (link_dhcp4_enabled(link)) {
eb34d4af 1614 assert(link->dhcp_client);
ff254138 1615
6a7a4e4d 1616 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1617
5c1d3fc9 1618 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP
1619 if (r < 0)
1620 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1621 }
ff254138 1622
6fc25497
SS
1623 return 0;
1624}
1625
1626static int link_acquire_conf(Link *link) {
1627 int r;
1628
1629 assert(link);
1630
1631 r = link_acquire_ipv4_conf(link);
1632 if (r < 0)
1633 return r;
1634
3f7cc080 1635 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS
1636 r = link_acquire_ipv6_conf(link);
1637 if (r < 0)
1638 return r;
1639 }
1640
7272b25e
LP
1641 if (link_lldp_emit_enabled(link)) {
1642 r = link_lldp_emit_start(link);
8e1ad1ea
LP
1643 if (r < 0)
1644 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1645 }
1646
ff254138
TG
1647 return 0;
1648}
1649
a61bb41c 1650bool link_has_carrier(Link *link) {
deb2e523
TG
1651 /* see Documentation/networking/operstates.txt in the kernel sources */
1652
a61bb41c 1653 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG
1654 return true;
1655
a61bb41c 1656 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1657 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW
1658 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1659 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG
1660 return true;
1661
1662 return false;
1663}
1664
0e2fdb83
SS
1665static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1666 int r;
1667
1668 assert(link);
1669
9524014e
DS
1670 link->setting_genmode = false;
1671
0e2fdb83
SS
1672 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1673 return 1;
1674
1675 r = sd_netlink_message_get_errno(m);
1676 if (r < 0)
5ecb131d 1677 log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring");
9524014e
DS
1678 else
1679 log_link_debug(link, "Setting address genmode done.");
1680
1681 if (link->state == LINK_STATE_INITIALIZED) {
1682 r = link_configure_continue(link);
1683 if (r < 0)
1684 link_enter_failed(link);
1685 }
0e2fdb83
SS
1686
1687 return 1;
1688}
1689
1690static int link_configure_addrgen_mode(Link *link) {
1691 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1692 uint8_t ipv6ll_mode;
1693 int r;
1694
1695 assert(link);
1696 assert(link->network);
1697 assert(link->manager);
1698 assert(link->manager->rtnl);
1699
9524014e 1700 if (!socket_ipv6_is_supported() || link->setting_genmode)
9f6e82e6
YW
1701 return 0;
1702
0e2fdb83
SS
1703 log_link_debug(link, "Setting address genmode for link");
1704
1705 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1706 if (r < 0)
1707 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1708
1709 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1710 if (r < 0)
1711 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1712
1713 r = sd_netlink_message_open_container(req, AF_INET6);
1714 if (r < 0)
1715 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1716
1717 if (!link_ipv6ll_enabled(link))
1718 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
6f6296b9 1719 else if (link->network->ipv6ll_address_gen_mode < 0) {
a6f1848a
SS
1720 r = sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL);
1721 if (r < 0) {
1722 /* The file may not exist. And even if it exists, when stable_secret is unset,
1723 * reading the file fails with EIO. */
1724 log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret: %m");
1725
1726 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1727 } else
1728 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1729 } else
6f6296b9 1730 ipv6ll_mode = link->network->ipv6ll_address_gen_mode;
0e2fdb83
SS
1731
1732 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1733 if (r < 0)
1734 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1735
1736 r = sd_netlink_message_close_container(req);
1737 if (r < 0)
1738 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1739
1740 r = sd_netlink_message_close_container(req);
1741 if (r < 0)
1742 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1743
1744 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1745 link_netlink_destroy_callback, link);
1746 if (r < 0)
1747 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1748
1749 link_ref(link);
9524014e 1750 link->setting_genmode = true;
0e2fdb83
SS
1751
1752 return 0;
1753}
1754
302a796f 1755static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG
1756 int r;
1757
1746cf2a
TG
1758 assert(link);
1759
5da8149f 1760 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG
1761 return 1;
1762
1c4baffc 1763 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1764 if (r < 0)
26d6b214 1765 /* we warn but don't fail the link, as it may be brought up later */
5ecb131d 1766 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
45ad2c13 1767
f882c247
TG
1768 return 1;
1769}
1770
1cc84f3b 1771static int link_up(Link *link) {
4afd3348 1772 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG
1773 int r;
1774
f882c247 1775 assert(link);
c106cc36 1776 assert(link->network);
f882c247
TG
1777 assert(link->manager);
1778 assert(link->manager->rtnl);
1779
6a7a4e4d 1780 log_link_debug(link, "Bringing link up");
449f7554 1781
6a7a4e4d
LP
1782 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1783 if (r < 0)
1784 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1785
2b2d8603 1786 /* set it free if not enslaved with networkd */
6cb955c6 1787 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY
1788 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1789 if (r < 0)
1790 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1791 }
1792
5d4795f3 1793 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP
1794 if (r < 0)
1795 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1796
c106cc36 1797 if (link->network->mac) {
1c4baffc 1798 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP
1799 if (r < 0)
1800 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG
1801 }
1802
302a796f
YW
1803 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1804 link_netlink_destroy_callback, link);
6a7a4e4d
LP
1805 if (r < 0)
1806 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1807
b226d99b
TG
1808 link_ref(link);
1809
f882c247
TG
1810 return 0;
1811}
1812
302a796f 1813static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR
1814 int r;
1815
1816 assert(link);
1817
1818 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1819 return 1;
1820
1c4baffc 1821 r = sd_netlink_message_get_errno(m);
0d4ad91d 1822 if (r < 0)
5ecb131d 1823 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
0d4ad91d
AR
1824
1825 return 1;
1826}
1827
8e54db83 1828int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1829 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR
1830 int r;
1831
1832 assert(link);
1833 assert(link->manager);
1834 assert(link->manager->rtnl);
1835
6a7a4e4d 1836 log_link_debug(link, "Bringing link down");
0d4ad91d
AR
1837
1838 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1839 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP
1840 if (r < 0)
1841 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR
1842
1843 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP
1844 if (r < 0)
1845 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1846
8e54db83
YW
1847 r = netlink_call_async(link->manager->rtnl, NULL, req,
1848 callback ?: link_down_handler,
302a796f 1849 link_netlink_destroy_callback, link);
6a7a4e4d
LP
1850 if (r < 0)
1851 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR
1852
1853 link_ref(link);
1854
1855 return 0;
1856}
1857
89fe6535
SS
1858static int link_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1859 int r;
1860
1861 assert(link);
1862
1863 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1864 return 1;
1865
1866 r = sd_netlink_message_get_errno(m);
1867 if (r < 0)
1868 log_link_message_warning_errno(link, m, r, "Could not set group for the interface");
1869
1870 return 1;
1871}
1872
1873static int link_set_group(Link *link) {
1874 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1875 int r;
1876
1877 assert(link);
1878 assert(link->network);
1879 assert(link->manager);
1880 assert(link->manager->rtnl);
1881
1882 if (link->network->group <= 0)
1883 return 0;
1884
1885 log_link_debug(link, "Setting group");
1886
1887 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1888 if (r < 0)
1889 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1890
1891 r = sd_netlink_message_append_u32(req, IFLA_GROUP, link->network->group);
1892 if (r < 0)
1893 return log_link_error_errno(link, r, "Could not set link group: %m");
1894
1895 r = netlink_call_async(link->manager->rtnl, NULL, req, link_group_handler,
1896 link_netlink_destroy_callback, link);
1897 if (r < 0)
1898 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1899
1900 link_ref(link);
1901
1902 return 0;
1903}
1904
0d4ad91d
AR
1905static int link_handle_bound_to_list(Link *link) {
1906 Link *l;
0d4ad91d
AR
1907 int r;
1908 bool required_up = false;
1909 bool link_is_up = false;
1910
1911 assert(link);
1912
1913 if (hashmap_isempty(link->bound_to_links))
1914 return 0;
1915
1916 if (link->flags & IFF_UP)
1917 link_is_up = true;
1918
90e74a66 1919 HASHMAP_FOREACH (l, link->bound_to_links)
0d4ad91d
AR
1920 if (link_has_carrier(l)) {
1921 required_up = true;
1922 break;
1923 }
1924
1925 if (!required_up && link_is_up) {
8e54db83 1926 r = link_down(link, NULL);
0d4ad91d
AR
1927 if (r < 0)
1928 return r;
1929 } else if (required_up && !link_is_up) {
1930 r = link_up(link);
1931 if (r < 0)
1932 return r;
1933 }
1934
1935 return 0;
1936}
1937
1938static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR
1939 Link *l;
1940 int r;
1941
1942 assert(link);
1943
1944 if (hashmap_isempty(link->bound_by_links))
1945 return 0;
1946
90e74a66 1947 HASHMAP_FOREACH (l, link->bound_by_links) {
0d4ad91d
AR
1948 r = link_handle_bound_to_list(l);
1949 if (r < 0)
1950 return r;
1951 }
1952
1953 return 0;
1954}
1955
1956static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1957 int r;
1958
1959 assert(link);
1960 assert(carrier);
1961
1962 if (link == carrier)
1963 return 0;
1964
1965 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1966 return 0;
1967
1968 r = hashmap_ensure_allocated(h, NULL);
1969 if (r < 0)
1970 return r;
1971
1972 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1973 if (r < 0)
1974 return r;
1975
1976 return 0;
1977}
1978
1979static int link_new_bound_by_list(Link *link) {
1980 Manager *m;
1981 Link *carrier;
0d4ad91d
AR
1982 int r;
1983 bool list_updated = false;
1984
1985 assert(link);
1986 assert(link->manager);
1987
1988 m = link->manager;
1989
90e74a66 1990 HASHMAP_FOREACH(carrier, m->links) {
0d4ad91d
AR
1991 if (!carrier->network)
1992 continue;
1993
1994 if (strv_isempty(carrier->network->bind_carrier))
1995 continue;
1996
191a3f16 1997 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR
1998 r = link_put_carrier(link, carrier, &link->bound_by_links);
1999 if (r < 0)
2000 return r;
2001
2002 list_updated = true;
2003 }
2004 }
2005
2006 if (list_updated)
84de38c5 2007 link_dirty(link);
0d4ad91d 2008
90e74a66 2009 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR
2010 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2011 if (r < 0)
2012 return r;
2013
84de38c5 2014 link_dirty(carrier);
0d4ad91d
AR
2015 }
2016
2017 return 0;
2018}
2019
2020static int link_new_bound_to_list(Link *link) {
2021 Manager *m;
2022 Link *carrier;
0d4ad91d
AR
2023 int r;
2024 bool list_updated = false;
2025
2026 assert(link);
2027 assert(link->manager);
2028
2029 if (!link->network)
2030 return 0;
2031
2032 if (strv_isempty(link->network->bind_carrier))
2033 return 0;
2034
2035 m = link->manager;
2036
90e74a66 2037 HASHMAP_FOREACH (carrier, m->links) {
191a3f16 2038 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR
2039 r = link_put_carrier(link, carrier, &link->bound_to_links);
2040 if (r < 0)
2041 return r;
2042
2043 list_updated = true;
2044 }
2045 }
2046
2047 if (list_updated)
84de38c5 2048 link_dirty(link);
0d4ad91d 2049
90e74a66 2050 HASHMAP_FOREACH (carrier, link->bound_to_links) {
0d4ad91d
AR
2051 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2052 if (r < 0)
2053 return r;
2054
84de38c5 2055 link_dirty(carrier);
0d4ad91d
AR
2056 }
2057
2058 return 0;
2059}
2060
2061static int link_new_carrier_maps(Link *link) {
2062 int r;
2063
2064 r = link_new_bound_by_list(link);
2065 if (r < 0)
2066 return r;
2067
2068 r = link_handle_bound_by_list(link);
2069 if (r < 0)
2070 return r;
2071
2072 r = link_new_bound_to_list(link);
2073 if (r < 0)
2074 return r;
2075
2076 r = link_handle_bound_to_list(link);
2077 if (r < 0)
2078 return r;
2079
2080 return 0;
2081}
2082
2083static void link_free_bound_to_list(Link *link) {
2084 Link *bound_to;
0d4ad91d 2085
90e74a66 2086 HASHMAP_FOREACH (bound_to, link->bound_to_links) {
0d4ad91d
AR
2087 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2088
2089 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2090 link_dirty(bound_to);
0d4ad91d
AR
2091 }
2092
2093 return;
2094}
2095
2096static void link_free_bound_by_list(Link *link) {
2097 Link *bound_by;
0d4ad91d 2098
90e74a66 2099 HASHMAP_FOREACH (bound_by, link->bound_by_links) {
0d4ad91d
AR
2100 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2101
2102 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2103 link_dirty(bound_by);
0d4ad91d
AR
2104 link_handle_bound_to_list(bound_by);
2105 }
2106 }
2107
2108 return;
2109}
2110
2111static void link_free_carrier_maps(Link *link) {
2112 bool list_updated = false;
2113
2114 assert(link);
2115
2116 if (!hashmap_isempty(link->bound_to_links)) {
2117 link_free_bound_to_list(link);
2118 list_updated = true;
2119 }
2120
2121 if (!hashmap_isempty(link->bound_by_links)) {
2122 link_free_bound_by_list(link);
2123 list_updated = true;
2124 }
2125
2126 if (list_updated)
84de38c5 2127 link_dirty(link);
0d4ad91d
AR
2128
2129 return;
2130}
2131
5f707e12
YW
2132static int link_append_to_master(Link *link, NetDev *netdev) {
2133 Link *master;
2134 int r;
2135
2136 assert(link);
2137 assert(netdev);
2138
2139 r = link_get(link->manager, netdev->ifindex, &master);
2140 if (r < 0)
2141 return r;
2142
de7fef4b 2143 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 2144 if (r <= 0)
5f707e12
YW
2145 return r;
2146
2147 link_ref(link);
2148 return 0;
2149}
2150
2151static void link_drop_from_master(Link *link, NetDev *netdev) {
2152 Link *master;
2153
2154 assert(link);
2155
2156 if (!link->manager || !netdev)
2157 return;
2158
2159 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2160 return;
2161
2162 link_unref(set_remove(master->slaves, link));
2163}
2164
2165static void link_detach_from_manager(Link *link) {
2166 if (!link || !link->manager)
2167 return;
2168
2169 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2170 link_clean(link);
2171
2172 /* The following must be called at last. */
2173 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2174 link_unref(link);
2175}
2176
0d4ad91d
AR
2177void link_drop(Link *link) {
2178 if (!link || link->state == LINK_STATE_LINGER)
2179 return;
2180
2181 link_set_state(link, LINK_STATE_LINGER);
2182
2183 link_free_carrier_maps(link);
2184
5f707e12
YW
2185 if (link->network) {
2186 link_drop_from_master(link, link->network->bridge);
2187 link_drop_from_master(link, link->network->bond);
2188 }
2189
6a7a4e4d 2190 log_link_debug(link, "Link removed");
0d4ad91d 2191
db2f8a2e 2192 (void) unlink(link->state_file);
c4397d94 2193 link_detach_from_manager(link);
0d4ad91d
AR
2194}
2195
3f265037 2196static int link_joined(Link *link) {
f882c247
TG
2197 int r;
2198
ef1ba606 2199 assert(link);
f5be5601 2200 assert(link->network);
dd3efc09 2201
0d4ad91d
AR
2202 if (!hashmap_isempty(link->bound_to_links)) {
2203 r = link_handle_bound_to_list(link);
2204 if (r < 0)
2205 return r;
2206 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG
2207 r = link_up(link);
2208 if (r < 0) {
2209 link_enter_failed(link);
2210 return r;
2211 }
ef1ba606 2212 }
f882c247 2213
9ed794a3 2214 if (link->network->bridge) {
e1853b00 2215 r = link_set_bridge(link);
6a7a4e4d
LP
2216 if (r < 0)
2217 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW
2218
2219 r = link_append_to_master(link, link->network->bridge);
2220 if (r < 0)
2221 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS
2222 }
2223
eb64b435 2224 if (link->network->bond) {
7fcee284 2225 r = link_set_bond(link);
eb64b435
SS
2226 if (r < 0)
2227 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2228
45e11abf 2229 r = link_append_to_master(link, link->network->bond);
959f65d3
YW
2230 if (r < 0)
2231 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS
2232 }
2233
ffff9abe
TJ
2234 if (link->network->use_br_vlan &&
2235 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ
2236 r = link_set_bridge_vlan(link);
2237 if (r < 0)
2238 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2239 }
2240
c1835a42
RM
2241 /* Skip setting up addresses until it gets carrier,
2242 or it would try to set addresses twice,
2243 which is bad for non-idempotent steps. */
dad2d78e 2244 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM
2245 return 0;
2246
b425c3ae 2247 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 2248 return link_request_set_addresses(link);
02b59d57
TG
2249}
2250
302a796f 2251static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG
2252 int r;
2253
1746cf2a 2254 assert(link);
ef1ba606 2255 assert(link->network);
34bf3c00 2256 assert(link->enslaving > 0);
02b59d57 2257
313cefa1 2258 link->enslaving--;
52433f6b 2259
5da8149f 2260 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG
2261 return 1;
2262
1c4baffc 2263 r = sd_netlink_message_get_errno(m);
856f962c 2264 if (r < 0 && r != -EEXIST) {
5ecb131d 2265 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG
2266 link_enter_failed(link);
2267 return 1;
4ff296b0
YW
2268 }
2269
2270 log_link_debug(link, "Joined netdev");
02b59d57 2271
34bf3c00 2272 if (link->enslaving == 0) {
4ff296b0
YW
2273 r = link_joined(link);
2274 if (r < 0)
2275 link_enter_failed(link);
34bf3c00 2276 }
02b59d57
TG
2277
2278 return 1;
2279}
2280
3f265037 2281static int link_enter_join_netdev(Link *link) {
6a0a2f86 2282 NetDev *netdev;
02b59d57
TG
2283 int r;
2284
2285 assert(link);
2286 assert(link->network);
bd08ce56 2287 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2288
289e6774 2289 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2290
84de38c5 2291 link_dirty(link);
34bf3c00 2292 link->enslaving = 0;
02b59d57 2293
d9c67ea1 2294 if (link->network->bond) {
cbff7170
TJ
2295 if (link->network->bond->state == NETDEV_STATE_READY &&
2296 link->network->bond->ifindex == link->master_ifindex)
2297 return link_joined(link);
2298
f2341e0a
LP
2299 log_struct(LOG_DEBUG,
2300 LOG_LINK_INTERFACE(link),
2301 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2302 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2303
34bf3c00
YW
2304 link->enslaving++;
2305
f2341e0a 2306 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2307 if (r < 0) {
f2341e0a
LP
2308 log_struct_errno(LOG_WARNING, r,
2309 LOG_LINK_INTERFACE(link),
2310 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2311 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG
2312 link_enter_failed(link);
2313 return r;
2314 }
0ad6148e
MO
2315 }
2316
d9c67ea1 2317 if (link->network->bridge) {
f2341e0a
LP
2318 log_struct(LOG_DEBUG,
2319 LOG_LINK_INTERFACE(link),
2320 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2321 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2322
34bf3c00
YW
2323 link->enslaving++;
2324
f2341e0a 2325 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2326 if (r < 0) {
f2341e0a
LP
2327 log_struct_errno(LOG_WARNING, r,
2328 LOG_LINK_INTERFACE(link),
2329 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2330 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO
2331 link_enter_failed(link);
2332 return r;
2333 }
52433f6b
TG
2334 }
2335
6cb955c6
AR
2336 if (link->network->vrf) {
2337 log_struct(LOG_DEBUG,
2338 LOG_LINK_INTERFACE(link),
2339 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS
2340 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2341
34bf3c00
YW
2342 link->enslaving++;
2343
6cb955c6
AR
2344 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2345 if (r < 0) {
2346 log_struct_errno(LOG_WARNING, r,
2347 LOG_LINK_INTERFACE(link),
2348 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2349 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR
2350 link_enter_failed(link);
2351 return r;
2352 }
6cb955c6
AR
2353 }
2354
90e74a66 2355 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7951dea2 2356
2b6db913
YW
2357 if (netdev->ifindex > 0)
2358 /* Assume already enslaved. */
a63e5daa 2359 continue;
a63e5daa 2360
7033af49
YW
2361 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2362 continue;
2363
f2341e0a
LP
2364 log_struct(LOG_DEBUG,
2365 LOG_LINK_INTERFACE(link),
2366 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2367 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2368
34bf3c00
YW
2369 link->enslaving++;
2370
f2341e0a 2371 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2372 if (r < 0) {
f2341e0a
LP
2373 log_struct_errno(LOG_WARNING, r,
2374 LOG_LINK_INTERFACE(link),
2375 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2376 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS
2377 link_enter_failed(link);
2378 return r;
2379 }
326cb406
SS
2380 }
2381
34bf3c00
YW
2382 if (link->enslaving == 0)
2383 return link_joined(link);
2384
ef1ba606
TG
2385 return 0;
2386}
2387
769d324c 2388static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP
2389 int r;
2390
765afd5c 2391 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP
2392 return 0;
2393
765afd5c
LP
2394 /* We propagate the forwarding flag from one interface to the
2395 * global setting one way. This means: as long as at least one
2396 * interface was configured at any time that had IP forwarding
2397 * enabled the setting will stay on for good. We do this
2398 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2399 * somewhat in sync (see below). */
15dee3f0 2400
62e021a9 2401 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2402 if (r < 0)
765afd5c 2403 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2404
769d324c
LP
2405 return 0;
2406}
2407
2408static int link_set_ipv6_forward(Link *link) {
769d324c
LP
2409 int r;
2410
765afd5c 2411 if (!link_ipv6_forward_enabled(link))
8add5f79
NO
2412 return 0;
2413
61233823 2414 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP
2415 * packet forwarding setting: either packet forwarding is on
2416 * for all, or off for all. We hence don't bother with a
2417 * per-interface setting, but simply propagate the interface
2418 * flag, if it is set, to the global flag, one-way. Note that
2419 * while IPv4 would allow a per-interface flag, we expose the
2420 * same behaviour there and also propagate the setting from
2421 * one to all, to keep things simple (see above). */
15dee3f0 2422
62e021a9 2423 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2424 if (r < 0)
765afd5c 2425 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP
2426
2427 return 0;
2428}
2429
49092e22 2430static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2431 IPv6PrivacyExtensions s;
49092e22
SS
2432 int r;
2433
1f0d9695 2434 s = link_ipv6_privacy_extensions(link);
66a6bd68 2435 if (s < 0)
49092e22
SS
2436 return 0;
2437
62e021a9 2438 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2439 if (r < 0)
49092e22
SS
2440 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2441
2442 return 0;
2443}
2444
4f2e437a 2445static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS
2446 int r;
2447
2448 /* Make this a NOP if IPv6 is not available */
2449 if (!socket_ipv6_is_supported())
2450 return 0;
2451
2452 if (link->flags & IFF_LOOPBACK)
2453 return 0;
2454
d68e2e59
LP
2455 if (!link->network)
2456 return 0;
2457
62e021a9 2458 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2459 if (r < 0)
fe307276 2460 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS
2461
2462 return 0;
2463}
2464
8749cbcd 2465static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS
2466 int r;
2467
2468 /* Make this a NOP if IPv6 is not available */
2469 if (!socket_ipv6_is_supported())
2470 return 0;
2471
2472 if (link->flags & IFF_LOOPBACK)
2473 return 0;
2474
d68e2e59
LP
2475 if (!link->network)
2476 return 0;
2477
8749cbcd
SS
2478 if (link->network->ipv6_dad_transmits < 0)
2479 return 0;
2480
62e021a9 2481 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2482 if (r < 0)
8749cbcd 2483 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS
2484
2485 return 0;
2486}
2487
b69c3180 2488static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS
2489 int r;
2490
2491 /* Make this a NOP if IPv6 is not available */
2492 if (!socket_ipv6_is_supported())
2493 return 0;
2494
2495 if (link->flags & IFF_LOOPBACK)
2496 return 0;
2497
d68e2e59
LP
2498 if (!link->network)
2499 return 0;
2500
b69c3180
SS
2501 if (link->network->ipv6_hop_limit < 0)
2502 return 0;
2503
62e021a9 2504 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2505 if (r < 0)
b69c3180 2506 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS
2507
2508 return 0;
2509}
2510
11102cba 2511static int link_set_ipv6_mtu(Link *link) {
11102cba
SS
2512 int r;
2513
2514 /* Make this a NOP if IPv6 is not available */
2515 if (!socket_ipv6_is_supported())
2516 return 0;
2517
2518 if (link->flags & IFF_LOOPBACK)
2519 return 0;
2520
2521 if (link->network->ipv6_mtu == 0)
2522 return 0;
2523
d236718c
DS
2524 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
2525 * on the interface. Bump up IPv6 MTU bytes to IPV6_MTU_MIN. */
2526 if (link->network->ipv6_mtu < IPV6_MIN_MTU) {
2527 log_link_notice(link, "Bumping IPv6 MTU to "STRINGIFY(IPV6_MIN_MTU)" byte minimum required");
2528 link->network->ipv6_mtu = IPV6_MIN_MTU;
2529 }
2530
62e021a9 2531 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
d236718c
DS
2532 if (r < 0) {
2533 if (link->mtu < link->network->ipv6_mtu)
2534 log_link_warning(link, "Cannot set IPv6 MTU %"PRIu32" higher than device MTU %"PRIu32,
2535 link->network->ipv6_mtu, link->mtu);
2536 else
2537 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2538 }
2539
2540 link->ipv6_mtu_set = true;
11102cba
SS
2541
2542 return 0;
2543}
2544
94d76d07
YW
2545static int link_set_ipv4_accept_local(Link *link) {
2546 int r;
2547
2548 if (link->flags & IFF_LOOPBACK)
2549 return 0;
2550
2551 if (link->network->ipv4_accept_local < 0)
2552 return 0;
2553
2554 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "accept_local", link->network->ipv4_accept_local);
2555 if (r < 0)
2556 log_link_warning_errno(link, r, "Cannot set IPv4 accept_local flag for interface: %m");
2557
2558 return 0;
2559}
2560
30226d27
TJ
2561static bool link_is_static_address_configured(Link *link, Address *address) {
2562 Address *net_address;
2563
2564 assert(link);
2565 assert(address);
2566
2567 if (!link->network)
2568 return false;
2569
2570 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2571 if (address_equal(net_address, address))
2572 return true;
6f5d73ab
YW
2573 else if (address->family == AF_INET6 && net_address->family == AF_INET6 &&
2574 in_addr_equal(AF_INET6, &address->in_addr, &net_address->in_addr_peer) > 0)
2575 return true;
30226d27
TJ
2576
2577 return false;
2578}
2579
7ecf0c3e
TJ
2580static bool link_is_static_route_configured(Link *link, Route *route) {
2581 Route *net_route;
2582
2583 assert(link);
2584 assert(route);
2585
2586 if (!link->network)
2587 return false;
2588
2589 LIST_FOREACH(routes, net_route, link->network->static_routes)
2590 if (route_equal(net_route, route))
2591 return true;
2592
2593 return false;
2594}
2595
db51778f
YW
2596static bool link_address_is_dynamic(Link *link, Address *address) {
2597 Route *route;
db51778f
YW
2598
2599 assert(link);
2600 assert(address);
2601
2602 if (address->cinfo.ifa_prefered != CACHE_INFO_INFINITY_LIFE_TIME)
2603 return true;
2604
2605 /* Even when the address is leased from a DHCP server, networkd assign the address
2606 * without lifetime when KeepConfiguration=dhcp. So, let's check that we have
2607 * corresponding routes with RTPROT_DHCP. */
90e74a66 2608 SET_FOREACH(route, link->routes_foreign) {
db51778f
YW
2609 if (route->protocol != RTPROT_DHCP)
2610 continue;
2611
2612 if (address->family != route->family)
2613 continue;
2614
2615 if (in_addr_equal(address->family, &address->in_addr, &route->prefsrc))
2616 return true;
2617 }
2618
2619 return false;
2620}
2621
0917a271
DS
2622static int link_enumerate_ipv6_tentative_addresses(Link *link) {
2623 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
2624 sd_netlink_message *addr;
2625 int r;
2626
2627 assert(link);
2628 assert(link->manager);
2629 assert(link->manager->rtnl);
2630
2631 r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_GETADDR, 0, AF_INET6);
2632 if (r < 0)
2633 return r;
2634
2635 r = sd_netlink_call(link->manager->rtnl, req, 0, &reply);
2636 if (r < 0)
2637 return r;
2638
2639 for (addr = reply; addr; addr = sd_netlink_message_next(addr)) {
2640 unsigned char flags;
2641 int ifindex;
2642
2643 r = sd_rtnl_message_addr_get_ifindex(addr, &ifindex);
2644 if (r < 0) {
2645 log_link_warning_errno(link, r, "rtnl: invalid ifindex, ignoring: %m");
2646 continue;
2647 } else if (link->ifindex != ifindex)
2648 continue;
2649
2650 r = sd_rtnl_message_addr_get_flags(addr, &flags);
2651 if (r < 0) {
2652 log_link_warning_errno(link, r, "rtnl: received address message with invalid flags, ignoring: %m");
2653 continue;
2654 } else if (!(flags & IFA_F_TENTATIVE))
2655 continue;
2656
2657 log_link_debug(link, "Found tentative ipv6 link-local address");
2658 (void) manager_rtnl_process_address(link->manager->rtnl, addr, link->manager);
2659 }
2660
2661 return 0;
2662}
2663
5e5b137a
TG
2664static int link_drop_foreign_config(Link *link) {
2665 Address *address;
2666 Route *route;
5e5b137a
TG
2667 int r;
2668
0917a271
DS
2669 /* The kernel doesn't notify us about tentative addresses;
2670 * so if ipv6ll is disabled, we need to enumerate them now so we can drop them below */
2671 if (!link_ipv6ll_enabled(link)) {
2672 r = link_enumerate_ipv6_tentative_addresses(link);
2673 if (r < 0)
2674 return r;
2675 }
2676
90e74a66 2677 SET_FOREACH(address, link->addresses_foreign) {
fe307276 2678 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2679 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
5e5b137a
TG
2680 continue;
2681
db51778f 2682 if (link_address_is_dynamic(link, address)) {
b1b0b42e 2683 if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
db51778f 2684 continue;
b1b0b42e 2685 } else if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
db51778f
YW
2686 continue;
2687
30226d27
TJ
2688 if (link_is_static_address_configured(link, address)) {
2689 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2690 if (r < 0)
2691 return log_link_error_errno(link, r, "Failed to add address: %m");
2692 } else {
63ae0569 2693 r = address_remove(address, link, NULL);
30226d27
TJ
2694 if (r < 0)
2695 return r;
2696 }
5e5b137a
TG
2697 }
2698
59048336
YW
2699 r = link_drop_foreign_neighbors(link);
2700 if (r < 0)
2701 return r;
d1bdafd2 2702
90e74a66 2703 SET_FOREACH(route, link->routes_foreign) {
fe307276 2704 /* do not touch routes managed by the kernel */
5e5b137a
TG
2705 if (route->protocol == RTPROT_KERNEL)
2706 continue;
2707
bd7d6cec
YW
2708 /* do not touch multicast route added by kernel */
2709 /* FIXME: Why the kernel adds this route with protocol RTPROT_BOOT??? We need to investigate that.
2710 * https://tools.ietf.org/html/rfc4862#section-5.4 may explain why. */
2711 if (route->protocol == RTPROT_BOOT &&
2712 route->family == AF_INET6 &&
2713 route->dst_prefixlen == 8 &&
2714 in_addr_equal(AF_INET6, &route->dst, &(union in_addr_union) { .in6 = {{{ 0xff,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0 }}} }))
2715 continue;
2716
b1b0b42e 2717 if (route->protocol == RTPROT_STATIC && link->network &&
db51778f
YW
2718 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2719 continue;
2720
b1b0b42e 2721 if (route->protocol == RTPROT_DHCP && link->network &&
db51778f
YW
2722 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2723 continue;
2724
7ecf0c3e 2725 if (link_is_static_route_configured(link, route)) {
f1368755 2726 r = route_add(link, route, NULL);
7ecf0c3e
TJ
2727 if (r < 0)
2728 return r;
2729 } else {
4645ad47 2730 r = route_remove(route, link, NULL);
7ecf0c3e
TJ
2731 if (r < 0)
2732 return r;
2733 }
5e5b137a
TG
2734 }
2735
2736 return 0;
2737}
2738
9b966cee
YW
2739static int remove_static_address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2740 int r;
2741
2742 assert(m);
2743 assert(link);
2744 assert(link->ifname);
2745 assert(link->address_remove_messages > 0);
2746
2747 link->address_remove_messages--;
2748
2749 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2750 return 1;
2751
2752 r = sd_netlink_message_get_errno(m);
2753 if (r < 0 && r != -EADDRNOTAVAIL)
2754 log_link_message_warning_errno(link, m, r, "Could not drop address");
2755 else if (r >= 0)
2756 (void) manager_rtnl_process_address(rtnl, m, link->manager);
2757
2758 if (link->address_remove_messages == 0 && link->request_static_addresses) {
2759 link_set_state(link, LINK_STATE_CONFIGURING);
2760 r = link_request_set_addresses(link);
2761 if (r < 0)
2762 link_enter_failed(link);
2763 }
2764
2765 return 1;
2766}
2767
3104883d 2768static int link_drop_config(Link *link) {
410a7f15 2769 Address *address, *pool_address;
3104883d 2770 Route *route;
3104883d
SS
2771 int r;
2772
90e74a66 2773 SET_FOREACH(address, link->addresses) {
3104883d 2774 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2775 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
3104883d
SS
2776 continue;
2777
9b966cee 2778 r = address_remove(address, link, remove_static_address_handler);
3104883d
SS
2779 if (r < 0)
2780 return r;
410a7f15 2781
9b966cee
YW
2782 link->address_remove_messages++;
2783
410a7f15 2784 /* If this address came from an address pool, clean up the pool */
b6766fb1 2785 LIST_FOREACH(addresses, pool_address, link->pool_addresses)
410a7f15
RM
2786 if (address_equal(address, pool_address)) {
2787 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2788 address_free(pool_address);
2789 break;
2790 }
3104883d
SS
2791 }
2792
59048336
YW
2793 r = link_drop_neighbors(link);
2794 if (r < 0)
2795 return r;
d1bdafd2 2796
90e74a66 2797 SET_FOREACH(route, link->routes) {
3104883d
SS
2798 /* do not touch routes managed by the kernel */
2799 if (route->protocol == RTPROT_KERNEL)
2800 continue;
2801
4645ad47 2802 r = route_remove(route, link, NULL);
3104883d
SS
2803 if (r < 0)
2804 return r;
2805 }
2806
c69305ff
LP
2807 ndisc_flush(link);
2808
3104883d
SS
2809 return 0;
2810}
2811
051e77ca
SS
2812static int link_configure_ipv4_dad(Link *link) {
2813 Address *address;
2814 int r;
2815
2816 assert(link);
2817 assert(link->network);
2818
2819 LIST_FOREACH(addresses, address, link->network->static_addresses)
2820 if (address->family == AF_INET &&
2821 FLAGS_SET(address->duplicate_address_detection, ADDRESS_FAMILY_IPV4)) {
2822 r = configure_ipv4_duplicate_address_detection(link, address);
2823 if (r < 0)
2824 return log_link_error_errno(link, r, "Failed to configure IPv4ACD: %m");
2825 }
2826
2827 return 0;
2828}
2829
34658df2
YW
2830static int link_configure_traffic_control(Link *link) {
2831 TrafficControl *tc;
02b59d57
TG
2832 int r;
2833
34658df2
YW
2834 link->tc_configured = false;
2835 link->tc_messages = 0;
4ecdcb07 2836
90e74a66 2837 ORDERED_HASHMAP_FOREACH(tc, link->network->tc_by_section) {
34658df2 2838 r = traffic_control_configure(link, tc);
4ecdcb07
YW
2839 if (r < 0)
2840 return r;
2841 }
2842
34658df2
YW
2843 if (link->tc_messages == 0)
2844 link->tc_configured = true;
4ecdcb07 2845 else
34658df2 2846 log_link_debug(link, "Configuring traffic control");
4ecdcb07
YW
2847
2848 return 0;
2849}
2850
518cd6b5
SS
2851static int link_configure_sr_iov(Link *link) {
2852 SRIOV *sr_iov;
518cd6b5
SS
2853 int r;
2854
2855 link->sr_iov_configured = false;
2856 link->sr_iov_messages = 0;
2857
90e74a66 2858 ORDERED_HASHMAP_FOREACH(sr_iov, link->network->sr_iov_by_section) {
518cd6b5
SS
2859 r = sr_iov_configure(link, sr_iov);
2860 if (r < 0)
2861 return r;
2862 }
2863
2864 if (link->sr_iov_messages == 0)
2865 link->sr_iov_configured = true;
2866 else
2867 log_link_debug(link, "Configuring SR-IOV");
2868
2869 return 0;
2870}
2871
4ecdcb07
YW
2872static int link_configure(Link *link) {
2873 int r;
2874
ef1ba606 2875 assert(link);
b22d8a00 2876 assert(link->network);
bd08ce56 2877 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2878
34658df2 2879 r = link_configure_traffic_control(link);
4ecdcb07
YW
2880 if (r < 0)
2881 return r;
2882
518cd6b5
SS
2883 r = link_configure_sr_iov(link);
2884 if (r < 0)
2885 return r;
2886
500b96eb 2887 if (link->iftype == ARPHRD_CAN)
93ea7750 2888 return link_configure_can(link);
92c918b0 2889
482efedc
SS
2890 /* If IPv6 configured that is static IPv6 address and IPv6LL autoconfiguration is enabled
2891 * for this interface, then enable IPv6 */
57ad7607 2892 (void) link_update_ipv6_sysctl(link);
482efedc 2893
23d8b221
SS
2894 r = link_set_proxy_arp(link);
2895 if (r < 0)
2896 return r;
2897
a0e5c15d
FK
2898 r = ipv6_proxy_ndp_addresses_configure(link);
2899 if (r < 0)
2900 return r;
2901
769d324c
LP
2902 r = link_set_ipv4_forward(link);
2903 if (r < 0)
2904 return r;
2905
2906 r = link_set_ipv6_forward(link);
5a8bcb67
LP
2907 if (r < 0)
2908 return r;
2909
49092e22
SS
2910 r = link_set_ipv6_privacy_extensions(link);
2911 if (r < 0)
2912 return r;
2913
4f2e437a
SS
2914 r = link_set_ipv6_accept_ra(link);
2915 if (r < 0)
2916 return r;
2917
8749cbcd
SS
2918 r = link_set_ipv6_dad_transmits(link);
2919 if (r < 0)
2920 return r;
b69c3180
SS
2921
2922 r = link_set_ipv6_hop_limit(link);
2923 if (r < 0)
2924 return r;
8749cbcd 2925
94d76d07
YW
2926 r = link_set_ipv4_accept_local(link);
2927 if (r < 0)
2928 return r;
2929
99d2baa2
SS
2930 r = link_set_flags(link);
2931 if (r < 0)
2932 return r;
2933
89fe6535
SS
2934 r = link_set_group(link);
2935 if (r < 0)
2936 return r;
2937
910feb78 2938 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
b22d8a00 2939 r = ipv4ll_configure(link);
eb34d4af
TG
2940 if (r < 0)
2941 return r;
2942 }
2943
78c958f8 2944 if (link_dhcp4_enabled(link)) {
64b21ece
MV
2945 r = dhcp4_set_promote_secondaries(link);
2946 if (r < 0)
2947 return r;
2948
3c9b8860 2949 r = dhcp4_configure(link);
eb34d4af
TG
2950 if (r < 0)
2951 return r;
eb34d4af
TG
2952 }
2953
78c958f8 2954 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG
2955 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2956 if (r < 0)
2957 return r;
2958
2959 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2960 if (r < 0)
2961 return r;
dd43110f
TG
2962 }
2963
62379e88
TG
2964 if (link_dhcp6_enabled(link) ||
2965 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG
2966 r = dhcp6_configure(link);
2967 if (r < 0)
2968 return r;
2969 }
2970
2971 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2972 r = ndisc_configure(link);
4138fb2c
PF
2973 if (r < 0)
2974 return r;
2975 }
2976
7465dd22
PF
2977 if (link_radv_enabled(link)) {
2978 r = radv_configure(link);
2979 if (r < 0)
2980 return r;
2981 }
2982
8e1ad1ea 2983 if (link_lldp_rx_enabled(link)) {
7f853950 2984 r = link_lldp_rx_configure(link);
273eec24
LP
2985 if (r < 0)
2986 return r;
ce43e484
SS
2987 }
2988
f6fcc1c2 2989 r = link_configure_mtu(link);
40288ece
YW
2990 if (r < 0)
2991 return r;
44b598a1 2992
9f6e82e6
YW
2993 r = link_configure_addrgen_mode(link);
2994 if (r < 0)
2995 return r;
0e2fdb83 2996
051e77ca
SS
2997 r = link_configure_ipv4_dad(link);
2998 if (r < 0)
2999 return r;
3000
3a390124
DS
3001 return link_configure_continue(link);
3002}
3003
3004/* The configuration continues in this separate function, instead of
3005 * including this in the above link_configure() function, for two
3006 * reasons:
3007 * 1) some devices reset the link when the mtu is set, which caused
3008 * an infinite loop here in networkd; see:
3009 * https://github.com/systemd/systemd/issues/6593
3010 * https://github.com/systemd/systemd/issues/9831
3011 * 2) if ipv6ll is disabled, then bringing the interface up must be
3012 * delayed until after we get confirmation from the kernel that
3013 * the addr_gen_mode parameter has been set (via netlink), see:
3014 * https://github.com/systemd/systemd/issues/13882
3015 */
3016static int link_configure_continue(Link *link) {
55dc8c4a
YW
3017 int r;
3018
3019 assert(link);
3020 assert(link->network);
bd08ce56 3021 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a 3022
9524014e 3023 if (link->setting_mtu || link->setting_genmode)
55dc8c4a
YW
3024 return 0;
3025
4c649652
DS
3026 /* Drop foreign config, but ignore loopback or critical devices.
3027 * We do not want to remove loopback address or addresses used for root NFS. */
3028 if (!(link->flags & IFF_LOOPBACK) &&
3029 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
3030 r = link_drop_foreign_config(link);
3031 if (r < 0)
3032 return r;
3033 }
3034
d236718c
DS
3035 /* The kernel resets ipv6 mtu after changing device mtu;
3036 * we must set this here, after we've set device mtu */
3037 r = link_set_ipv6_mtu(link);
3038 if (r < 0)
3039 return r;
3040
dad2d78e 3041 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG
3042 r = link_acquire_conf(link);
3043 if (r < 0)
3044 return r;
cc544d5f 3045 }
1e9be60b 3046
3f265037 3047 return link_enter_join_netdev(link);
505f8da7
TG
3048}
3049
27dfc982
YW
3050static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
3051 assert(duid);
3052
3053 if (duid->raw_data_len > 0)
3054 return 0;
3055
3056 if (duid->type != DUID_TYPE_UUID)
3057 return -EINVAL;
3058
3059 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
3060 duid->raw_data_len = sizeof(sd_id128_t);
3061
3062 return 1;
3063}
3064
3065int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
3066 Manager *manager = userdata;
3067 const sd_bus_error *e;
3068 const void *a;
3069 size_t sz;
3070 DUID *duid;
3071 Link *link;
3072 int r;
3073
3074 assert(m);
3075 assert(manager);
3076
3077 e = sd_bus_message_get_error(m);
3078 if (e) {
3079 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 3080 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW
3081 e->message);
3082 goto configure;
3083 }
3084
3085 r = sd_bus_message_read_array(m, 'y', &a, &sz);
3086 if (r < 0)
3087 goto configure;
3088
3089 if (sz != sizeof(sd_id128_t)) {
ab4dd984 3090 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW
3091 goto configure;
3092 }
3093
3094 memcpy(&manager->product_uuid, a, sz);
3095 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
3096 (void) duid_set_uuid(duid, manager->product_uuid);
3097
3098 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
3099
3100configure:
3101 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3dc2e7af
YW
3102 link_unref(link);
3103
27dfc982
YW
3104 r = link_configure(link);
3105 if (r < 0)
4ff296b0 3106 link_enter_failed(link);
27dfc982
YW
3107 }
3108
3109 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
3110
3111 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
3112 * even if the method fails. */
3113 manager->has_product_uuid = true;
3114
3115 return 1;
3116}
3117
3118static bool link_requires_uuid(Link *link) {
3119 const DUID *duid;
3120
3121 assert(link);
3122 assert(link->manager);
3123 assert(link->network);
3124
3125 duid = link_get_duid(link);
3126 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
3127 return false;
3128
3129 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
3130 return true;
3131
3132 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
3133 return true;
3134
3135 return false;
3136}
3137
3138static int link_configure_duid(Link *link) {
3139 Manager *m;
3140 DUID *duid;
3141 int r;
3142
3143 assert(link);
3144 assert(link->manager);
3145 assert(link->network);
3146
3147 m = link->manager;
3148 duid = link_get_duid(link);
3149
3150 if (!link_requires_uuid(link))
3151 return 1;
3152
3153 if (m->has_product_uuid) {
3154 (void) duid_set_uuid(duid, m->product_uuid);
3155 return 1;
3156 }
3157
3158 if (!m->links_requesting_uuid) {
3159 r = manager_request_product_uuid(m, link);
3160 if (r < 0) {
3161 if (r == -ENOMEM)
3162 return r;
3163
ab4dd984
ZJS
3164 log_link_warning_errno(link, r,
3165 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW
3166 return 1;
3167 }
3168 } else {
3169 r = set_put(m->links_requesting_uuid, link);
3170 if (r < 0)
3171 return log_oom();
39dbd0c7
ZJS
3172 if (r > 0)
3173 link_ref(link);
27dfc982
YW
3174
3175 r = set_put(m->duids_requesting_uuid, duid);
3176 if (r < 0)
3177 return log_oom();
3178 }
3179
3180 return 0;
3181}
3182
572b21d9 3183static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
ad932b15
YW
3184 Network *network;
3185 int r;
3186
572b21d9
YW
3187 if (m) {
3188 _cleanup_strv_free_ char **s = NULL;
3189
3190 r = sd_netlink_message_get_errno(m);
3191 if (r < 0)
3192 return r;
3193
3194 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3195 if (r < 0 && r != -ENODATA)
3196 return r;
3197
3198 strv_free_and_replace(link->alternative_names, s);
3199 }
3200
c643bda5
YW
3201 r = network_get(link->manager, link->iftype, link->sd_device,
3202 link->ifname, link->alternative_names, link->driver,
3203 &link->mac, &link->permanent_mac,
3204 link->wlan_iftype, link->ssid, &link->bssid, &network);
ad932b15
YW
3205 if (r == -ENOENT) {
3206 link_enter_unmanaged(link);
3207 return 0;
3208 } else if (r == 0 && network->unmanaged) {
3209 link_enter_unmanaged(link);
3210 return 0;
3211 } else if (r < 0)
3212 return r;
3213
99b8517c 3214 if (link->network == network && !force)
ad932b15
YW
3215 return 0;
3216
3217 log_link_info(link, "Re-configuring with %s", network->filename);
3218
3219 /* Dropping old .network file */
3220 r = link_stop_clients(link, false);
572b21d9 3221 if (r < 0)
ad932b15 3222 return r;
ad932b15
YW
3223
3224 if (link_dhcp4_server_enabled(link))
3225 (void) sd_dhcp_server_stop(link->dhcp_server);
3226
3227 r = link_drop_config(link);
3228 if (r < 0)
3229 return r;
3230
2c7b826d 3231 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
ad932b15
YW
3232 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
3233 r = link_drop_foreign_config(link);
3234 if (r < 0)
3235 return r;
3236 }
3237
3238 link_free_carrier_maps(link);
3239 link_free_engines(link);
3240 link->network = network_unref(link->network);
3241
3242 /* Then, apply new .network file */
3243 r = network_apply(network, link);
3244 if (r < 0)
3245 return r;
3246
3247 r = link_new_carrier_maps(link);
3248 if (r < 0)
3249 return r;
3250
3251 link_set_state(link, LINK_STATE_INITIALIZED);
8ae7b8a1 3252 link_dirty(link);
ad932b15
YW
3253
3254 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3255 * link_configure() is called later asynchronously. */
3256 r = link_configure_duid(link);
3257 if (r <= 0)
3258 return r;
3259
3260 r = link_configure(link);
3261 if (r < 0)
3262 return r;
3263
3264 return 0;
3265}
3266
572b21d9
YW
3267static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3268 int r;
3269
3270 r = link_reconfigure_internal(link, m, false);
3271 if (r < 0)
3272 link_enter_failed(link);
3273
3274 return 1;
3275}
3276
3277static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3278 int r;
3279
3280 r = link_reconfigure_internal(link, m, true);
3281 if (r < 0)
3282 link_enter_failed(link);
3283
3284 return 1;
3285}
3286
3287int link_reconfigure(Link *link, bool force) {
3288 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
3289 int r;
3290
2c0d7ed3
YW
3291 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
3292 return 0;
3293
572b21d9
YW
3294 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3295 link->ifindex);
3296 if (r < 0)
3297 return r;
3298
3299 r = netlink_call_async(link->manager->rtnl, NULL, req,
3300 force ? link_force_reconfigure_handler : link_reconfigure_handler,
3301 link_netlink_destroy_callback, link);
3302 if (r < 0)
3303 return r;
3304
3305 link_ref(link);
3306
3307 return 0;
3308}
3309
e6bf7774 3310static int link_initialized_and_synced(Link *link) {
505f8da7 3311 Network *network;
505f8da7
TG
3312 int r;
3313
3314 assert(link);
3315 assert(link->ifname);
3316 assert(link->manager);
3317
bd08ce56
YW
3318 /* We may get called either from the asynchronous netlink callback,
3319 * or directly for link_add() if running in a container. See link_add(). */
3320 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 3321 return 0;
505f8da7 3322
6a7a4e4d 3323 log_link_debug(link, "Link state is up-to-date");
bd08ce56 3324 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 3325
0d4ad91d
AR
3326 r = link_new_bound_by_list(link);
3327 if (r < 0)
3328 return r;
3329
3330 r = link_handle_bound_by_list(link);
3331 if (r < 0)
3332 return r;
3333
c4a03a56 3334 if (!link->network) {
0894cfe4 3335 r = wifi_get_info(link);
8d968fdd
YW
3336 if (r < 0)
3337 return r;
3338
c643bda5
YW
3339 r = network_get(link->manager, link->iftype, link->sd_device,
3340 link->ifname, link->alternative_names, link->driver,
3341 &link->mac, &link->permanent_mac,
3342 link->wlan_iftype, link->ssid, &link->bssid, &network);
c4a03a56
TG
3343 if (r == -ENOENT) {
3344 link_enter_unmanaged(link);
4232cf04 3345 return 0;
a09dc546
DM
3346 } else if (r == 0 && network->unmanaged) {
3347 link_enter_unmanaged(link);
3348 return 0;
c4a03a56
TG
3349 } else if (r < 0)
3350 return r;
505f8da7 3351
c4a03a56
TG
3352 if (link->flags & IFF_LOOPBACK) {
3353 if (network->link_local != ADDRESS_FAMILY_NO)
3354 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3355
c4a03a56
TG
3356 if (network->dhcp != ADDRESS_FAMILY_NO)
3357 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3358
c4a03a56
TG
3359 if (network->dhcp_server)
3360 log_link_debug(link, "Ignoring DHCP server for loopback link");
3361 }
bd2efe92 3362
7d342c03 3363 r = network_apply(network, link);
c4a03a56
TG
3364 if (r < 0)
3365 return r;
3366 }
505f8da7 3367
0d4ad91d
AR
3368 r = link_new_bound_to_list(link);
3369 if (r < 0)
3370 return r;
3371
27dfc982
YW
3372 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3373 * link_configure() is called later asynchronously. */
3374 r = link_configure_duid(link);
3375 if (r <= 0)
3376 return r;
3377
a748b692
TG
3378 r = link_configure(link);
3379 if (r < 0)
3380 return r;
3381
4232cf04 3382 return 0;
505f8da7
TG
3383}
3384
302a796f 3385static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
572b21d9 3386 _cleanup_strv_free_ char **s = NULL;
4ff296b0
YW
3387 int r;
3388
572b21d9
YW
3389 r = sd_netlink_message_get_errno(m);
3390 if (r < 0) {
40681e5c 3391 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW
3392 link_enter_failed(link);
3393 return 0;
3394 }
3395
3396 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3397 if (r < 0 && r != -ENODATA) {
3398 link_enter_failed(link);
3399 return 0;
3400 }
3401
3402 strv_free_and_replace(link->alternative_names, s);
3403
4ff296b0
YW
3404 r = link_initialized_and_synced(link);
3405 if (r < 0)
3406 link_enter_failed(link);
e6bf7774
YW
3407 return 1;
3408}
3409
51517f9e 3410int link_initialized(Link *link, sd_device *device) {
4afd3348 3411 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG
3412 int r;
3413
3414 assert(link);
3415 assert(link->manager);
3416 assert(link->manager->rtnl);
3417 assert(device);
3418
8434fd5c 3419 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG
3420 return 0;
3421
51517f9e 3422 if (link->sd_device)
679b3605
TG
3423 return 0;
3424
79008bdd 3425 log_link_debug(link, "udev initialized link");
bd08ce56 3426 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 3427
51517f9e 3428 link->sd_device = sd_device_ref(device);
4f561e8e 3429
3c9b8860
TG
3430 /* udev has initialized the link, but we don't know if we have yet
3431 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3432 * when it returns we know that the pending NEWLINKs have already been
3433 * processed and that we are up-to-date */
4f561e8e 3434
3c9b8860
TG
3435 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3436 link->ifindex);
4f561e8e
TG
3437 if (r < 0)
3438 return r;
3439
302a796f
YW
3440 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3441 link_netlink_destroy_callback, link);
4f561e8e
TG
3442 if (r < 0)
3443 return r;
3444
5da8149f
TG
3445 link_ref(link);
3446
4f561e8e
TG
3447 return 0;
3448}
3449
c4a03a56 3450static int link_load(Link *link) {
0bc70f1d
TG
3451 _cleanup_free_ char *network_file = NULL,
3452 *addresses = NULL,
f703cc2c 3453 *routes = NULL,
0bc70f1d
TG
3454 *dhcp4_address = NULL,
3455 *ipv4ll_address = NULL;
3456 union in_addr_union address;
c4a03a56
TG
3457 int r;
3458
3459 assert(link);
3460
aa8fbc74 3461 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG
3462 "NETWORK_FILE", &network_file,
3463 "ADDRESSES", &addresses,
f703cc2c 3464 "ROUTES", &routes,
0bc70f1d 3465 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3466 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG
3467 if (r < 0 && r != -ENOENT)
3468 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3469
3470 if (network_file) {
3471 Network *network;
3472 char *suffix;
3473
3474 /* drop suffix */
3475 suffix = strrchr(network_file, '.');
3476 if (!suffix) {
3477 log_link_debug(link, "Failed to get network name from %s", network_file);
3478 goto network_file_fail;
3479 }
3480 *suffix = '\0';
3481
3482 r = network_get_by_name(link->manager, basename(network_file), &network);
3483 if (r < 0) {
3484 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3485 goto network_file_fail;
3486 }
3487
7d342c03 3488 r = network_apply(network, link);
c4a03a56
TG
3489 if (r < 0)
3490 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3491 }
3492
3493network_file_fail:
3494
1f68f772
ZJS
3495 for (const char *p = addresses; p; ) {
3496 _cleanup_free_ char *address_str = NULL;
3497 char *prefixlen_str;
3498 int family;
3499 unsigned char prefixlen;
c4a03a56 3500
1f68f772
ZJS
3501 r = extract_first_word(&p, &address_str, NULL, 0);
3502 if (r < 0)
3503 log_link_warning_errno(link, r, "failed to parse ADDRESSES: %m");
3504 if (r <= 0)
3505 break;
c4a03a56 3506
1f68f772
ZJS
3507 prefixlen_str = strchr(address_str, '/');
3508 if (!prefixlen_str) {
3509 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
3510 continue;
3511 }
3512 *prefixlen_str++ = '\0';
c4a03a56 3513
1f68f772
ZJS
3514 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3515 if (r != 1) {
3516 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3517 continue;
3518 }
c4a03a56 3519
1f68f772
ZJS
3520 r = in_addr_from_string_auto(address_str, &family, &address);
3521 if (r < 0) {
3522 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
3523 continue;
c4a03a56 3524 }
c4a03a56 3525
1f68f772
ZJS
3526 r = address_add(link, family, &address, prefixlen, NULL);
3527 if (r < 0)
3528 return log_link_error_errno(link, r, "Failed to add address: %m");
3529 }
74544b4e 3530
1f68f772
ZJS
3531 for (const char *p = routes; p; ) {
3532 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
3533 _cleanup_(route_freep) Route *tmp = NULL;
3534 _cleanup_free_ char *route_str = NULL;
3535 char *prefixlen_str;
3536 Route *route;
f703cc2c 3537
1f68f772
ZJS
3538 r = extract_first_word(&p, &route_str, NULL, 0);
3539 if (r < 0)
3540 log_link_debug_errno(link, r, "failed to parse ROUTES: %m");
3541 if (r <= 0)
3542 break;
c598ac76 3543
1f68f772
ZJS
3544 prefixlen_str = strchr(route_str, '/');
3545 if (!prefixlen_str) {
3546 log_link_debug(link, "Failed to parse route %s", route_str);
3547 continue;
3548 }
3549 *prefixlen_str++ = '\0';
f703cc2c 3550
1f68f772
ZJS
3551 r = route_new(&tmp);
3552 if (r < 0)
3553 return log_oom();
f703cc2c 3554
1f68f772
ZJS
3555 r = sscanf(prefixlen_str,
3556 "%hhu/%hhu/%"SCNu32"/%"PRIu32"/"USEC_FMT,
3557 &tmp->dst_prefixlen,
3558 &tmp->tos,
3559 &tmp->priority,
3560 &tmp->table,
3561 &tmp->lifetime);
3562 if (r != 5) {
3563 log_link_debug(link,
3564 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3565 prefixlen_str);
3566 continue;
3567 }
f1368755 3568
1f68f772
ZJS
3569 r = in_addr_from_string_auto(route_str, &tmp->family, &tmp->dst);
3570 if (r < 0) {
3571 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
3572 continue;
3573 }
f703cc2c 3574
1f68f772
ZJS
3575 r = route_add(link, tmp, &route);
3576 if (r < 0)
3577 return log_link_error_errno(link, r, "Failed to add route: %m");
f703cc2c 3578
1f68f772
ZJS
3579 if (route->lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
3580 r = sd_event_add_time(link->manager->event, &expire,
3581 clock_boottime_or_monotonic(),
3582 route->lifetime, 0, route_expire_handler, route);
f703cc2c 3583 if (r < 0)
1f68f772 3584 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
f703cc2c 3585 }
1f68f772
ZJS
3586
3587 sd_event_source_unref(route->expire);
3588 route->expire = TAKE_PTR(expire);
f703cc2c
TG
3589 }
3590
0bc70f1d
TG
3591 if (dhcp4_address) {
3592 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3593 if (r < 0) {
b68d26b8 3594 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG
3595 goto dhcp4_address_fail;
3596 }
3597
b1c626f6 3598 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3599 if (r < 0)
b68d26b8 3600 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d 3601
1b43e246
DS
3602 r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0);
3603 if (r < 0)
3604 return log_link_error_errno(link, r, "Failed to attach DHCPv4 event: %m");
3605
0bc70f1d
TG
3606 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3607 if (r < 0)
b68d26b8 3608 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG
3609 }
3610
3611dhcp4_address_fail:
3612
3613 if (ipv4ll_address) {
3614 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3615 if (r < 0) {
b68d26b8 3616 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG
3617 goto ipv4ll_address_fail;
3618 }
3619
3620 r = sd_ipv4ll_new(&link->ipv4ll);
3621 if (r < 0)
b68d26b8 3622 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d 3623
1b43e246
DS
3624 r = sd_ipv4ll_attach_event(link->ipv4ll, NULL, 0);
3625 if (r < 0)
3626 return log_link_error_errno(link, r, "Failed to attach IPv4LL event: %m");
3627
0bc70f1d
TG
3628 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3629 if (r < 0)
b68d26b8 3630 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG
3631 }
3632
3633ipv4ll_address_fail:
3634
c4a03a56
TG
3635 return 0;
3636}
3637
1c4baffc 3638int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3639 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3640 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3641 Link *link;
5a937ea2 3642 int r;
505f8da7
TG
3643
3644 assert(m);
fbbeb65a 3645 assert(m->rtnl);
505f8da7
TG
3646 assert(message);
3647 assert(ret);
3648
3649 r = link_new(m, message, ret);
3650 if (r < 0)
3651 return r;
3652
3653 link = *ret;
3654
6a7a4e4d 3655 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3656
c4a03a56
TG
3657 r = link_load(link);
3658 if (r < 0)
3659 return r;
3660
bf331d87
YW
3661 if (path_is_read_only_fs("/sys") <= 0) {
3662 /* udev should be around */
ae06ab10 3663 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW
3664 r = sd_device_new_from_device_id(&device, ifindex_str);
3665 if (r < 0) {
4d59e14f
YW
3666 log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m");
3667 return 0;
5c416fc4 3668 }
505f8da7 3669
5a937ea2 3670 r = sd_device_get_is_initialized(device);
51517f9e 3671 if (r < 0) {
bf331d87 3672 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW
3673 goto failed;
3674 }
5a937ea2 3675 if (r == 0) {
505f8da7 3676 /* not yet ready */
79008bdd 3677 log_link_debug(link, "link pending udev initialization...");
505f8da7 3678 return 0;
3c4cb064 3679 }
505f8da7 3680
299ad32d
YW
3681 r = device_is_renaming(device);
3682 if (r < 0) {
bf331d87 3683 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW
3684 goto failed;
3685 }
3686 if (r > 0) {
bf331d87 3687 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW
3688 return 0;
3689 }
3690
4f561e8e
TG
3691 r = link_initialized(link, device);
3692 if (r < 0)
5c416fc4 3693 goto failed;
4f561e8e 3694 } else {
e6bf7774 3695 r = link_initialized_and_synced(link);
4f561e8e 3696 if (r < 0)
5c416fc4 3697 goto failed;
4f561e8e 3698 }
505f8da7 3699
a748b692 3700 return 0;
5c416fc4
TG
3701failed:
3702 link_enter_failed(link);
3703 return r;
a748b692
TG
3704}
3705
c601ebf7 3706int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG
3707 int r;
3708
3709 assert(link);
3710
3711 log_link_info(link, "Gained IPv6LL");
3712
c601ebf7 3713 link->ipv6ll_address = *address;
e7ab854c
TG
3714 link_check_ready(link);
3715
b9ea3d2e 3716 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG
3717 r = link_acquire_ipv6_conf(link);
3718 if (r < 0) {
3719 link_enter_failed(link);
3720 return r;
3721 }
3722 }
3723
3724 return 0;
3725}
3726
9c0a72f9
TG
3727static int link_carrier_gained(Link *link) {
3728 int r;
3729
3730 assert(link);
3731
0894cfe4 3732 r = wifi_get_info(link);
8d968fdd
YW
3733 if (r < 0)
3734 return r;
3735 if (r > 0) {
572b21d9
YW
3736 r = link_reconfigure_internal(link, NULL, false);
3737 if (r < 0) {
3738 link_enter_failed(link);
8d968fdd 3739 return r;
572b21d9 3740 }
8d968fdd
YW
3741 }
3742
b9ea3d2e 3743 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG
3744 r = link_acquire_conf(link);
3745 if (r < 0) {
3746 link_enter_failed(link);
3747 return r;
3748 }
6fc25497 3749
b425c3ae 3750 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 3751 r = link_request_set_addresses(link);
6fc25497
SS
3752 if (r < 0)
3753 return r;
9c0a72f9
TG
3754 }
3755
0d4ad91d
AR
3756 r = link_handle_bound_by_list(link);
3757 if (r < 0)
3758 return r;
3759
1f241589
YW
3760 if (!link->bridge_mdb_configured) {
3761 r = link_set_bridge_mdb(link);
3762 if (r < 0)
3763 return r;
3764 }
3765
3766 if (streq_ptr(link->kind, "bridge")) {
3767 Link *slave;
3768
3769 SET_FOREACH(slave, link->slaves) {
3770 if (slave->bridge_mdb_configured)
3771 continue;
3772
3773 r = link_set_bridge_mdb(slave);
3774 if (r < 0)
3775 link_enter_failed(slave);
3776 }
3777 }
3db468ea 3778
9c0a72f9
TG
3779 return 0;
3780}
3781
3782static int link_carrier_lost(Link *link) {
3783 int r;
3784
3785 assert(link);
3786
25e992ba 3787 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS
3788 return 0;
3789
fbdb6605 3790 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW
3791 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3792 * configuration and stop the clients as well. */
97e7fb39
SS
3793 if (link->setting_mtu)
3794 return 0;
3795
95355a28 3796 r = link_stop_clients(link, false);
9c0a72f9
TG
3797 if (r < 0) {
3798 link_enter_failed(link);
3799 return r;
3800 }
3801
28464ae0
SS
3802 if (link_dhcp4_server_enabled(link))
3803 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3804
3104883d
SS
3805 r = link_drop_config(link);
3806 if (r < 0)
3807 return r;
3808
2c7b826d 3809 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
f258e948 3810 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM
3811 r = link_drop_foreign_config(link);
3812 if (r < 0)
3813 return r;
3814 }
3104883d 3815
0d4ad91d
AR
3816 r = link_handle_bound_by_list(link);
3817 if (r < 0)
3818 return r;
3819
9c0a72f9
TG
3820 return 0;
3821}
3822
3823int link_carrier_reset(Link *link) {
3824 int r;
3825
3826 assert(link);
3827
3828 if (link_has_carrier(link)) {
3829 r = link_carrier_lost(link);
3830 if (r < 0)
3831 return r;
3832
3833 r = link_carrier_gained(link);
3834 if (r < 0)
3835 return r;
3836
6a7a4e4d 3837 log_link_info(link, "Reset carrier");
9c0a72f9
TG
3838 }
3839
3840 return 0;
3841}
3842
d236718c
DS
3843/* This is called every time an interface admin state changes to up;
3844 * specifically, when IFF_UP flag changes from unset to set */
3845static int link_admin_state_up(Link *link) {
3846 int r;
3847
3848 /* We set the ipv6 mtu after the device mtu, but the kernel resets
3849 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
3850 * ipv6_mtu_set prevents this from trying to set it too early before
3851 * the link->network has been setup; we only need to reset it
3852 * here if we've already set it during normal initialization. */
3853 if (link->ipv6_mtu_set) {
3854 r = link_set_ipv6_mtu(link);
3855 if (r < 0)
3856 return r;
3857 }
3858
3859 return 0;
3860}
3861
1c4baffc 3862int link_update(Link *link, sd_netlink_message *m) {
572b21d9 3863 _cleanup_strv_free_ char **s = NULL;
c49b33ac 3864 struct ether_addr mac;
ca4e095a 3865 const char *ifname;
afe7fd56 3866 uint32_t mtu;
d236718c 3867 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 3868 int old_master, r;
22936833 3869
dd3efc09 3870 assert(link);
b8941f74 3871 assert(link->ifname);
22936833
TG
3872 assert(m);
3873
7619683b 3874 if (link->state == LINK_STATE_LINGER) {
5238e957 3875 log_link_info(link, "Link re-added");
289e6774 3876 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR
3877
3878 r = link_new_carrier_maps(link);
3879 if (r < 0)
3880 return r;
7619683b
TG
3881 }
3882
1c4baffc 3883 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3884 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3885 Manager *manager = link->manager;
b8941f74 3886
30de2b89 3887 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3888
30de2b89
YW
3889 link_drop(link);
3890 r = link_add(manager, m, &link);
3891 if (r < 0)
3892 return r;
b8941f74
TG
3893 }
3894
572b21d9
YW
3895 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3896 if (r >= 0)
3897 strv_free_and_replace(link->alternative_names, s);
3898
1c4baffc 3899 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG
3900 if (r >= 0 && mtu > 0) {
3901 link->mtu = mtu;
4e964aa0 3902 if (link->original_mtu == 0) {
afe7fd56 3903 link->original_mtu = mtu;
6a7a4e4d 3904 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG
3905 }
3906
3907 if (link->dhcp_client) {
3c9b8860
TG
3908 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3909 link->mtu);
fc95c359
YW
3910 if (r < 0)
3911 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3912 }
7465dd22
PF
3913
3914 if (link->radv) {
3915 r = sd_radv_set_mtu(link->radv, link->mtu);
3916 if (r < 0)
3917 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3918 }
9842de0d 3919 }
69629de9 3920
e9189a1f
TG
3921 /* The kernel may broadcast NEWLINK messages without the MAC address
3922 set, simply ignore them. */
1c4baffc 3923 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
807667f7
YW
3924 if (r >= 0 && memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN) != 0) {
3925
3926 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN);
3927
3928 log_link_debug(link, "Gained new MAC address: "
3929 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3930 mac.ether_addr_octet[0],
3931 mac.ether_addr_octet[1],
3932 mac.ether_addr_octet[2],
3933 mac.ether_addr_octet[3],
3934 mac.ether_addr_octet[4],
3935 mac.ether_addr_octet[5]);
3936
3937 if (link->ipv4ll) {
3938 bool restart = sd_ipv4ll_is_running(link->ipv4ll) > 0;
3939
3940 if (restart) {
3941 r = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 3942 if (r < 0)
807667f7 3943 return log_link_warning_errno(link, r, "Could not stop IPv4LL client: %m");
c49b33ac 3944 }
c49b33ac 3945
807667f7
YW
3946 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
3947 if (r < 0)
3948 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
3949
3950 if (restart) {
3951 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d 3952 if (r < 0)
807667f7
YW
3953 return log_link_warning_errno(link, r, "Could not restart IPv4LL client: %m");
3954 }
3955 }
3956
3957 if (link->dhcp_client) {
3958 r = sd_dhcp_client_set_mac(link->dhcp_client,
3959 (const uint8_t *) &link->mac,
3960 sizeof (link->mac),
3961 ARPHRD_ETHER);
3962 if (r < 0)
3963 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
3964
3965 r = dhcp4_set_client_identifier(link);
3966 if (r < 0)
3967 return log_link_warning_errno(link, r, "Could not set DHCP client identifier: %m");
3968 }
413708d1 3969
807667f7
YW
3970 if (link->dhcp6_client) {
3971 const DUID* duid = link_get_duid(link);
3972 bool restart = sd_dhcp6_client_is_running(link->dhcp6_client) > 0;
3973
3974 if (restart) {
3975 r = sd_dhcp6_client_stop(link->dhcp6_client);
fff1f40c 3976 if (r < 0)
807667f7 3977 return log_link_warning_errno(link, r, "Could not stop DHCPv6 client: %m");
c49b33ac 3978 }
4138fb2c 3979
807667f7
YW
3980 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
3981 (const uint8_t *) &link->mac,
3982 sizeof (link->mac),
3983 ARPHRD_ETHER);
3984 if (r < 0)
3985 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
8341a5c3 3986
807667f7
YW
3987 if (link->network->iaid_set) {
3988 r = sd_dhcp6_client_set_iaid(link->dhcp6_client, link->network->iaid);
6a7a4e4d 3989 if (r < 0)
807667f7
YW
3990 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3991 }
3992
3993 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3994 duid->type,
3995 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3996 duid->raw_data_len);
3997 if (r < 0)
3998 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
3999
4000 if (restart) {
4001 r = sd_dhcp6_client_start(link->dhcp6_client);
413708d1 4002 if (r < 0)
807667f7 4003 return log_link_warning_errno(link, r, "Could not restart DHCPv6 client: %m");
4138fb2c 4004 }
807667f7 4005 }
7465dd22 4006
807667f7
YW
4007 if (link->radv) {
4008 bool restart = sd_radv_is_running(link->radv);
4009
4010 if (restart) {
4011 r = sd_radv_stop(link->radv);
7465dd22 4012 if (r < 0)
807667f7 4013 return log_link_warning_errno(link, r, "Could not stop Router Advertisement: %m");
7465dd22 4014 }
420d2058 4015
807667f7
YW
4016 r = sd_radv_set_mac(link->radv, &link->mac);
4017 if (r < 0)
4018 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
4019
4020 if (restart) {
4021 r = sd_radv_start(link->radv);
420d2058 4022 if (r < 0)
807667f7 4023 return log_link_warning_errno(link, r, "Could not restart Router Advertisement: %m");
420d2058 4024 }
c49b33ac 4025 }
807667f7
YW
4026
4027 if (link->ndisc) {
4028 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
4029 if (r < 0)
4030 return log_link_warning_errno(link, r, "Could not update MAC for NDisc: %m");
4031 }
4f882b2a
TG
4032 }
4033
bb262ef0
YW
4034 old_master = link->master_ifindex;
4035 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
4036
d236718c 4037 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG
4038 had_carrier = link_has_carrier(link);
4039
bb262ef0 4040 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG
4041 if (r < 0)
4042 return r;
4043
d236718c
DS
4044 if (!link_was_admin_up && (link->flags & IFF_UP)) {
4045 log_link_info(link, "Link UP");
4046
4047 r = link_admin_state_up(link);
4048 if (r < 0)
4049 return r;
4050 } else if (link_was_admin_up && !(link->flags & IFF_UP))
4051 log_link_info(link, "Link DOWN");
4052
273eec24
LP
4053 r = link_update_lldp(link);
4054 if (r < 0)
4055 return r;
4056
a61bb41c
TG
4057 carrier_gained = !had_carrier && link_has_carrier(link);
4058 carrier_lost = had_carrier && !link_has_carrier(link);
4059
4060 if (carrier_gained) {
6a7a4e4d 4061 log_link_info(link, "Gained carrier");
a61bb41c 4062
9c0a72f9
TG
4063 r = link_carrier_gained(link);
4064 if (r < 0)
4065 return r;
a61bb41c 4066 } else if (carrier_lost) {
6a7a4e4d 4067 log_link_info(link, "Lost carrier");
a61bb41c 4068
9c0a72f9
TG
4069 r = link_carrier_lost(link);
4070 if (r < 0)
a61bb41c 4071 return r;
a61bb41c
TG
4072 }
4073
4074 return 0;
dd3efc09 4075}
fe8db0c5 4076
b295beea
LP
4077static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
4078 bool space = false;
b295beea
LP
4079 Link *link;
4080
4081 assert(f);
4082 assert(prefix);
4083
4084 if (hashmap_isempty(h))
4085 return;
4086
0d536673 4087 fputs(prefix, f);
90e74a66 4088 HASHMAP_FOREACH(link, h) {
b295beea 4089 if (space)
0d536673 4090 fputc(' ', f);
b295beea
LP
4091
4092 fprintf(f, "%i", link->ifindex);
4093 space = true;
4094 }
4095
0d536673 4096 fputc('\n', f);
b295beea
LP
4097}
4098
64581765 4099static void link_save_dns(Link *link, FILE *f, struct in_addr_full **dns, unsigned n_dns, bool *space) {
dddc8d1e 4100 for (unsigned j = 0; j < n_dns; j++) {
e77bd3fd 4101 const char *str;
15761549 4102
64581765
YW
4103 if (dns[j]->ifindex != 0 && dns[j]->ifindex != link->ifindex)
4104 continue;
4105
e77bd3fd
YW
4106 str = in_addr_full_to_string(dns[j]);
4107 if (!str)
15761549 4108 continue;
15761549
YW
4109
4110 if (*space)
4111 fputc(' ', f);
e77bd3fd 4112 fputs(str, f);
15761549
YW
4113 *space = true;
4114 }
4115}
4116
d5e172d2
ZJS
4117static void serialize_addresses(
4118 FILE *f,
4119 const char *lvalue,
4120 bool *space,
4121 char **addresses,
4122 sd_dhcp_lease *lease,
4123 bool conditional,
ddb82ec2 4124 sd_dhcp_lease_server_type what,
d5e172d2
ZJS
4125 sd_dhcp6_lease *lease6,
4126 bool conditional6,
4127 int (*lease6_get_addr)(sd_dhcp6_lease*, const struct in6_addr**),
4128 int (*lease6_get_fqdn)(sd_dhcp6_lease*, char ***)) {
4129 int r;
4130
4131 bool _space = false;
4132 if (!space)
4133 space = &_space;
4134
4135 if (lvalue)
4136 fprintf(f, "%s=", lvalue);
4137 fputstrv(f, addresses, NULL, space);
4138
4139 if (lease && conditional) {
4140 const struct in_addr *lease_addresses;
4141
4142 r = sd_dhcp_lease_get_servers(lease, what, &lease_addresses);
4143 if (r > 0)
d8bff5cc 4144 serialize_in_addrs(f, lease_addresses, r, space, in4_addr_is_non_local);
d5e172d2
ZJS
4145 }
4146
4147 if (lease6 && conditional6 && lease6_get_addr) {
4148 const struct in6_addr *in6_addrs;
4149
4150 r = lease6_get_addr(lease6, &in6_addrs);
d8bff5cc
ZJS
4151 if (r > 0)
4152 serialize_in6_addrs(f, in6_addrs, r, space);
d5e172d2
ZJS
4153 }
4154
4155 if (lease6 && conditional6 && lease6_get_fqdn) {
4156 char **in6_hosts;
4157
4158 r = lease6_get_fqdn(lease6, &in6_hosts);
4159 if (r > 0)
4160 fputstrv(f, in6_hosts, NULL, space);
4161 }
4162
4163 if (lvalue)
4164 fputc('\n', f);
4165}
4166
fe8db0c5 4167int link_save(Link *link) {
d361b373 4168 const char *admin_state, *oper_state, *carrier_state, *address_state;
68a8723c 4169 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 4170 _cleanup_fclose_ FILE *f = NULL;
c1eb9872 4171 Route *route;
18d8a2cf 4172 Address *a;
fe8db0c5
TG
4173 int r;
4174
4175 assert(link);
4176 assert(link->state_file);
68a8723c 4177 assert(link->lease_file);
bbf7c048
TG
4178 assert(link->manager);
4179
370e9930 4180 if (link->state == LINK_STATE_LINGER) {
6990fb6b 4181 (void) unlink(link->state_file);
370e9930
TG
4182 return 0;
4183 }
4184
34437b4f
LP
4185 link_lldp_save(link);
4186
deb2e523
TG
4187 admin_state = link_state_to_string(link->state);
4188 assert(admin_state);
4189
e375dcde
TG
4190 oper_state = link_operstate_to_string(link->operstate);
4191 assert(oper_state);
deb2e523 4192
ac999bf0
YW
4193 carrier_state = link_carrier_state_to_string(link->carrier_state);
4194 assert(carrier_state);
4195
4196 address_state = link_address_state_to_string(link->address_state);
4197 assert(address_state);
4198
fe8db0c5
TG
4199 r = fopen_temporary(link->state_file, &f, &temp_path);
4200 if (r < 0)
6a7a4e4d 4201 goto fail;
fe8db0c5 4202
5512a963 4203 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG
4204
4205 fprintf(f,
4206 "# This is private data. Do not parse.\n"
deb2e523 4207 "ADMIN_STATE=%s\n"
ac999bf0
YW
4208 "OPER_STATE=%s\n"
4209 "CARRIER_STATE=%s\n"
4210 "ADDRESS_STATE=%s\n",
4211 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 4212
bcb7a07e 4213 if (link->network) {
fe0e16db
YW
4214 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
4215 const char *dhcp_domainname = NULL, *p;
fe0e16db 4216 bool space;
07bdc70d 4217
c1a38904
MTL
4218 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
4219 yes_no(link->network->required_for_online));
4220
d5e172d2
ZJS
4221 LinkOperationalStateRange st = link->network->required_operstate_for_online;
4222 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s%s%s\n",
4223 strempty(link_operstate_to_string(st.min)),
4224 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? ":" : "",
4225 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? strempty(link_operstate_to_string(st.max)) : "");
4ac77d63 4226
adc5b2e2
TG
4227 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
4228
d5e172d2
ZJS
4229 /************************************************************/
4230
0d536673 4231 fputs("DNS=", f);
ea352b40 4232 space = false;
15761549 4233 if (link->n_dns != (unsigned) -1)
64581765 4234 link_save_dns(link, f, link->dns, link->n_dns, &space);
15761549 4235 else
64581765 4236 link_save_dns(link, f, link->network->dns, link->network->n_dns, &space);
d5314fff 4237
d5e172d2
ZJS
4238 serialize_addresses(f, NULL, &space,
4239 NULL,
4240 link->dhcp_lease,
4241 link->network->dhcp_use_dns,
ddb82ec2 4242 SD_DHCP_LEASE_DNS,
1633c457 4243 link->dhcp6_lease,
d5e172d2
ZJS
4244 link->network->dhcp6_use_dns,
4245 sd_dhcp6_lease_get_dns,
4246 NULL);
1e7a0e21 4247
a8c10331 4248 /* Make sure to flush out old entries before we use the NDisc data */
1e7a0e21
LP
4249 ndisc_vacuum(link);
4250
b296797f 4251 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP
4252 NDiscRDNSS *dd;
4253
90e74a66 4254 SET_FOREACH(dd, link->ndisc_rdnss)
d8bff5cc 4255 serialize_in6_addrs(f, &dd->address, 1, &space);
299d578f
SS
4256 }
4257
4258 fputc('\n', f);
4259
d5e172d2
ZJS
4260 /************************************************************/
4261
4262 serialize_addresses(f, "NTP", NULL,
4263 link->ntp ?: link->network->ntp,
4264 link->dhcp_lease,
4265 link->network->dhcp_use_ntp,
ddb82ec2 4266 SD_DHCP_LEASE_NTP,
1633c457 4267 link->dhcp6_lease,
d5e172d2
ZJS
4268 link->network->dhcp6_use_ntp,
4269 sd_dhcp6_lease_get_ntp_addrs,
4270 sd_dhcp6_lease_get_ntp_fqdn);
4271
4272 serialize_addresses(f, "SIP", NULL,
2a71d57f 4273 NULL,
d5e172d2
ZJS
4274 link->dhcp_lease,
4275 link->network->dhcp_use_sip,
ddb82ec2 4276 SD_DHCP_LEASE_SIP,
2a71d57f 4277 NULL, false, NULL, NULL);
d5e172d2
ZJS
4278
4279 /************************************************************/
bd8f6538 4280
b2a81c0b 4281 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 4282 if (link->dhcp_lease) {
b2a81c0b 4283 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW
4284 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
4285 }
1633c457
YW
4286 if (link->dhcp6_lease)
4287 (void) sd_dhcp6_lease_get_domains(link->dhcp6_lease, &dhcp6_domains);
07bdc70d
PF
4288 }
4289
fe0e16db
YW
4290 fputs("DOMAINS=", f);
4291 space = false;
90e74a66 4292 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains)
fe0e16db 4293 fputs_with_space(f, p, NULL, &space);
07bdc70d 4294
1e7a0e21 4295 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP
4296 if (dhcp_domainname)
4297 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW
4298 if (dhcp_domains)
4299 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP
4300 if (dhcp6_domains)
4301 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW
4302 }
4303
4304 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
4305 NDiscDNSSL *dd;
1e7a0e21 4306
90e74a66 4307 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP
4308 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4309 }
b2a81c0b 4310
0d536673 4311 fputc('\n', f);
6192b846 4312
d5e172d2
ZJS
4313 /************************************************************/
4314
fe0e16db
YW
4315 fputs("ROUTE_DOMAINS=", f);
4316 space = false;
90e74a66 4317 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains)
fe0e16db 4318 fputs_with_space(f, p, NULL, &space);
b2a81c0b 4319
1e7a0e21 4320 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
1e7a0e21
LP
4321 if (dhcp_domainname)
4322 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW
4323 if (dhcp_domains)
4324 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP
4325 if (dhcp6_domains)
4326 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW
4327 }
4328
4329 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
4330 NDiscDNSSL *dd;
1e7a0e21 4331
90e74a66 4332 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP
4333 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4334 }
b2a81c0b 4335
0d536673 4336 fputc('\n', f);
67272d15 4337
d5e172d2
ZJS
4338 /************************************************************/
4339
3c9b8860 4340 fprintf(f, "LLMNR=%s\n",
15761549 4341 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
d5e172d2
ZJS
4342
4343 /************************************************************/
4344
aaa297d4 4345 fprintf(f, "MDNS=%s\n",
15761549 4346 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
15761549 4347
d5e172d2
ZJS
4348 /************************************************************/
4349
4350 int dns_default_route =
4351 link->dns_default_route >= 0 ? link->dns_default_route :
4352 link->network->dns_default_route;
4353 if (dns_default_route >= 0)
4354 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(dns_default_route));
4355
4356 /************************************************************/
4357
4358 DnsOverTlsMode dns_over_tls_mode =
4359 link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID ? link->dns_over_tls_mode :
4360 link->network->dns_over_tls_mode;
4361 if (dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
4362 fprintf(f, "DNS_OVER_TLS=%s\n", dns_over_tls_mode_to_string(dns_over_tls_mode));
4363
4364 /************************************************************/
4365
4366 DnssecMode dnssec_mode =
4367 link->dnssec_mode != _DNSSEC_MODE_INVALID ? link->dnssec_mode :
4368 link->network->dnssec_mode;
4369 if (dnssec_mode != _DNSSEC_MODE_INVALID)
4370 fprintf(f, "DNSSEC=%s\n", dnssec_mode_to_string(dnssec_mode));
4371
4372 /************************************************************/
4373
4374 Set *nta_anchors = link->dnssec_negative_trust_anchors;
4375 if (set_isempty(nta_anchors))
4376 nta_anchors = link->network->dnssec_negative_trust_anchors;
4377
4378 if (!set_isempty(nta_anchors)) {
8a516214
LP
4379 const char *n;
4380
0d536673 4381 fputs("DNSSEC_NTA=", f);
8a516214 4382 space = false;
90e74a66 4383 SET_FOREACH(n, nta_anchors)
d390f8ef 4384 fputs_with_space(f, n, NULL, &space);
0d536673 4385 fputc('\n', f);
8a516214
LP
4386 }
4387
d5e172d2
ZJS
4388 /************************************************************/
4389
0d536673 4390 fputs("ADDRESSES=", f);
e7780c8d 4391 space = false;
90e74a66 4392 SET_FOREACH(a, link->addresses) {
e7780c8d
TG
4393 _cleanup_free_ char *address_str = NULL;
4394
4395 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
4396 if (r < 0)
4397 goto fail;
4398
e7780c8d
TG
4399 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
4400 space = true;
4401 }
0d536673 4402 fputc('\n', f);
c1eb9872 4403
d5e172d2
ZJS
4404 /************************************************************/
4405
0d536673 4406 fputs("ROUTES=", f);
c1eb9872 4407 space = false;
90e74a66 4408 SET_FOREACH(route, link->routes) {
c1eb9872
TG
4409 _cleanup_free_ char *route_str = NULL;
4410
4411 r = in_addr_to_string(route->family, &route->dst, &route_str);
4412 if (r < 0)
4413 goto fail;
4414
ecc3f340
ZJS
4415 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
4416 space ? " " : "", route_str,
f833694d 4417 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG
4418 space = true;
4419 }
4420
0d536673 4421 fputc('\n', f);
bcb7a07e 4422 }
7374f9d8 4423
b295beea
LP
4424 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
4425 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 4426
8eb9058d 4427 if (link->dhcp_lease) {
bd91b83e 4428 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 4429 if (r < 0)
c2d6bd61 4430 goto fail;
fe8db0c5 4431
7374f9d8 4432 fprintf(f,
b0e39c82
TG
4433 "DHCP_LEASE=%s\n",
4434 link->lease_file);
deb2e523 4435 } else
6990fb6b 4436 (void) unlink(link->lease_file);
fe8db0c5 4437
0bc70f1d
TG
4438 if (link->ipv4ll) {
4439 struct in_addr address;
4440
4441 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
4442 if (r >= 0) {
0d536673 4443 fputs("IPV4LL_ADDRESS=", f);
072320ea 4444 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 4445 fputc('\n', f);
0bc70f1d
TG
4446 }
4447 }
4448
7e738e7b
SS
4449 if (link->dhcp6_client) {
4450 _cleanup_free_ char *duid = NULL;
4451 uint32_t iaid;
4452
4453 r = sd_dhcp6_client_get_iaid(link->dhcp6_client, &iaid);
4454 if (r >= 0)
4455 fprintf(f, "DHCP6_CLIENT_IAID=0x%x\n", iaid);
4456
4457 r = sd_dhcp6_client_duid_as_string(link->dhcp6_client, &duid);
4458 if (r >= 0)
4459 fprintf(f, "DHCP6_CLIENT_DUID=%s\n", duid);
4460 }
18d8a2cf 4461
c2d6bd61
LP
4462 r = fflush_and_check(f);
4463 if (r < 0)
4464 goto fail;
fe8db0c5 4465
c2d6bd61 4466 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 4467 r = -errno;
c2d6bd61 4468 goto fail;
fe8db0c5
TG
4469 }
4470
c2d6bd61 4471 return 0;
dacd6cee 4472
c2d6bd61 4473fail:
6a7a4e4d 4474 (void) unlink(link->state_file);
6a7a4e4d
LP
4475 if (temp_path)
4476 (void) unlink(temp_path);
4477
dacd6cee 4478 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG
4479}
4480
84de38c5
TG
4481/* The serialized state in /run is no longer up-to-date. */
4482void link_dirty(Link *link) {
4483 int r;
4484
4485 assert(link);
4486
0c241a37
SS
4487 /* mark manager dirty as link is dirty */
4488 manager_dirty(link->manager);
4489
de7fef4b 4490 r = set_ensure_put(&link->manager->dirty_links, NULL, link);
0c241a37 4491 if (r <= 0)
de7fef4b 4492 /* Ignore allocation errors and don't take another ref if the link was already dirty */
84de38c5 4493 return;
84de38c5
TG
4494 link_ref(link);
4495}
4496
4497/* The serialized state in /run is up-to-date */
4498void link_clean(Link *link) {
4499 assert(link);
4500 assert(link->manager);
4501
1046bf9b 4502 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG
4503}
4504
c2a65950
YW
4505int link_save_and_clean(Link *link) {
4506 int r;
4507
4508 r = link_save(link);
4509 if (r < 0)
4510 return r;
4511
4512 link_clean(link);
4513 return 0;
4514}
4515
fe8db0c5 4516static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4517 [LINK_STATE_PENDING] = "pending",
bd08ce56 4518 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 4519 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 4520 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4521 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4522 [LINK_STATE_FAILED] = "failed",
370e9930 4523 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG
4524};
4525
4526DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
5ecb131d
YW
4527
4528int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg) {
4529 const char *err_msg = NULL;
4530
4531 (void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg);
d157714b
YW
4532 return log_link_full_errno(link, level, err,
4533 "%s: %s%s%s%m",
4534 msg,
4535 strempty(err_msg),
4536 err_msg && !endswith(err_msg, ".") ? "." : "",
4537 err_msg ? " " : "");
5ecb131d 4538}