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network: introduce link_set_address_labels()
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
53e1b683 1/* SPDX-License-Identifier: LGPL-2.1+ */
f579559b 2
9aa5d8ba 3#include <netinet/in.h>
f579559b 4#include <linux/if.h>
8f815e8b 5#include <linux/if_arp.h>
518cd6b5 6#include <linux/if_link.h>
4cc7a82c 7#include <unistd.h>
f579559b 8
b5efdb8a 9#include "alloc-util.h"
737f1405
YW		 10#include "bond.h"
11#include "bridge.h"
1346b1f0 12#include "bus-util.h"
27dfc982 13#include "dhcp-identifier.h"
bd91b83e 14#include "dhcp-lease-internal.h"
686d13b9 15#include "env-file.h"
4bb7cc82 16#include "ethtool-util.h"
3ffd4af2 17#include "fd-util.h"
cf1d700d 18#include "fileio.h"
737f1405 19#include "ipvlan.h"
ef118d00 20#include "missing_network.h"
cf1d700d 21#include "netlink-util.h"
c6f7c917 22#include "network-internal.h"
3ddcbeea 23#include "networkd-can.h"
8fcf1d61 24#include "networkd-dhcp-server.h"
ca5ad760
YW		 25#include "networkd-dhcp4.h"
26#include "networkd-dhcp6.h"
27#include "networkd-ipv4ll.h"
a0e5c15d 28#include "networkd-ipv6-proxy-ndp.h"
6a1af3d4
YW		 29#include "networkd-link-bus.h"
30#include "networkd-link.h"
8e1ad1ea 31#include "networkd-lldp-tx.h"
23f53b99 32#include "networkd-manager.h"
1e7a0e21 33#include "networkd-ndisc.h"
e4a71bf3 34#include "networkd-neighbor.h"
75156ccb 35#include "networkd-nexthop.h"
518cd6b5 36#include "networkd-sriov.h"
7465dd22 37#include "networkd-radv.h"
bce67bbe 38#include "networkd-routing-policy-rule.h"
8d968fdd 39#include "networkd-wifi.h"
cf1d700d
TG		 40#include "set.h"
41#include "socket-util.h"
bf331d87 42#include "stat-util.h"
15a5e950 43#include "stdio-util.h"
8b43440b 44#include "string-table.h"
51517f9e 45#include "strv.h"
62e021a9 46#include "sysctl-util.h"
34658df2 47#include "tc.h"
e4de7287 48#include "tmpfile-util.h"
299ad32d 49#include "udev-util.h"
cf1d700d 50#include "util.h"
737f1405 51#include "vrf.h"
fc2f9534 52
bdb9f580
YW		 53uint32_t link_get_vrf_table(Link *link) {
54 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
55}
56
57uint32_t link_get_dhcp_route_table(Link *link) {
58 /* When the interface is part of an VRF use the VRFs routing table, unless
59 * another table is explicitly specified. */
60 if (link->network->dhcp_route_table_set)
61 return link->network->dhcp_route_table;
62 return link_get_vrf_table(link);
63}
64
65uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
66 if (link->network->ipv6_accept_ra_route_table_set)
67 return link->network->ipv6_accept_ra_route_table;
68 return link_get_vrf_table(link);
69}
70
f24648a6
YW		 71DUID* link_get_duid(Link *link) {
72 if (link->network->duid.type != _DUID_TYPE_INVALID)
73 return &link->network->duid;
74 else
75 return &link->manager->duid;
76}
77
b9d74c40
LP		 78static bool link_dhcp6_enabled(Link *link) {
79 assert(link);
80
fa709992
LP		 81 if (!socket_ipv6_is_supported())
82 return false;
83
78c958f8
TG		 84 if (link->flags & IFF_LOOPBACK)
85 return false;
86
87 if (!link->network)
88 return false;
89
f2bfcdb9
YW		 90 if (link->network->bond)
91 return false;
92
500b96eb 93 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 94 return false;
95
e0ee46f2 96 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 97}
98
b9d74c40
LP		 99static bool link_dhcp4_enabled(Link *link) {
100 assert(link);
101
78c958f8
TG		 102 if (link->flags & IFF_LOOPBACK)
103 return false;
104
105 if (!link->network)
106 return false;
107
f2bfcdb9
YW		 108 if (link->network->bond)
109 return false;
110
500b96eb 111 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 112 return false;
113
e0ee46f2 114 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 115}
116
b9d74c40
LP		 117static bool link_dhcp4_server_enabled(Link *link) {
118 assert(link);
119
78c958f8
TG		 120 if (link->flags & IFF_LOOPBACK)
121 return false;
122
123 if (!link->network)
124 return false;
125
f2bfcdb9
YW		 126 if (link->network->bond)
127 return false;
128
500b96eb 129 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 130 return false;
131
78c958f8
TG		 132 return link->network->dhcp_server;
133}
134
2d792895 135bool link_ipv4ll_enabled(Link *link, AddressFamily mask) {
b9d74c40 136 assert(link);
910feb78 137 assert((mask & ~(ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) == 0);
b9d74c40 138
78c958f8
TG		 139 if (link->flags & IFF_LOOPBACK)
140 return false;
141
142 if (!link->network)
143 return false;
144
500b96eb 145 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 146 return false;
147
98d20a17 148 if (STRPTR_IN_SET(link->kind,
149 "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
b0486c73 150 "vti6", "nlmon", "xfrm", "bareudp"))
a8f5bba6
JD		 151 return false;
152
f410d463
YW		 153 /* L3 or L3S mode do not support ARP. */
154 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
155 return false;
156
f2bfcdb9
YW		 157 if (link->network->bond)
158 return false;
159
910feb78 160 return link->network->link_local & mask;
8bc17bb3
SS		 161}
162
b9d74c40
LP		 163static bool link_ipv6ll_enabled(Link *link) {
164 assert(link);
165
fa709992
LP		 166 if (!socket_ipv6_is_supported())
167 return false;
168
d0d6a4cd
TG		 169 if (link->flags & IFF_LOOPBACK)
170 return false;
171
172 if (!link->network)
173 return false;
174
500b96eb 175 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 176 return false;
177
178 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon"))
a8f5bba6
JD		 179 return false;
180
f2bfcdb9
YW		 181 if (link->network->bond)
182 return false;
183
e0ee46f2 184 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 185}
186
439689c6
SS		 187static bool link_ipv6_enabled(Link *link) {
188 assert(link);
189
190 if (!socket_ipv6_is_supported())
191 return false;
192
b102cdca 193 if (link->network->bond)
2b00a4e0
TY		 194 return false;
195
500b96eb 196 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 197 return false;
198
4cef7fe3 199 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
adfeee49
YW		 200 if (link_ipv6ll_enabled(link))
201 return true;
202
203 if (network_has_static_ipv6_configurations(link->network))
204 return true;
205
206 return false;
439689c6
SS		 207}
208
7465dd22
PF		 209static bool link_radv_enabled(Link *link) {
210 assert(link);
211
212 if (!link_ipv6ll_enabled(link))
213 return false;
214
55a7c78b 215 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 216}
217
769d324c 218static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 219 assert(link);
220
5a8bcb67
LP		 221 if (link->flags & IFF_LOOPBACK)
222 return false;
223
224 if (!link->network)
225 return false;
226
2d792895 227 if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
765afd5c
LP		 228 return false;
229
e0ee46f2 230 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 231}
232
233static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 234 assert(link);
765afd5c
LP		 235
236 if (!socket_ipv6_is_supported())
237 return false;
238
769d324c
LP		 239 if (link->flags & IFF_LOOPBACK)
240 return false;
241
242 if (!link->network)
243 return false;
244
2d792895 245 if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
765afd5c
LP		 246 return false;
247
e0ee46f2 248 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 249}
250
23d8b221
SS		 251static bool link_proxy_arp_enabled(Link *link) {
252 assert(link);
253
254 if (link->flags & IFF_LOOPBACK)
255 return false;
256
257 if (!link->network)
258 return false;
259
260 if (link->network->proxy_arp < 0)
261 return false;
262
263 return true;
264}
265
b9d74c40
LP		 266static bool link_ipv6_accept_ra_enabled(Link *link) {
267 assert(link);
268
fa709992
LP		 269 if (!socket_ipv6_is_supported())
270 return false;
271
f5a8c43f
TG		 272 if (link->flags & IFF_LOOPBACK)
273 return false;
274
275 if (!link->network)
276 return false;
277
702c979f
SS		 278 if (!link_ipv6ll_enabled(link))
279 return false;
280
f5a8c43f
TG		 281 /* If unset use system default (enabled if local forwarding is disabled.
282 * disabled if local forwarding is enabled).
283 * If set, ignore or enforce RA independent of local forwarding state.
284 */
285 if (link->network->ipv6_accept_ra < 0)
286 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
287 return !link_ipv6_forward_enabled(link);
288 else if (link->network->ipv6_accept_ra > 0)
289 /* accept RA even if ip_forward is enabled */
290 return true;
291 else
292 /* ignore RA */
293 return false;
294}
295
1f0d9695 296static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 297 assert(link);
d68e2e59
LP		 298
299 if (!socket_ipv6_is_supported())
300 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
301
49092e22 302 if (link->flags & IFF_LOOPBACK)
1f0d9695 303 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 304
305 if (!link->network)
1f0d9695 306 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 307
308 return link->network->ipv6_privacy_extensions;
309}
310
57ad7607 311static int link_update_ipv6_sysctl(Link *link) {
482efedc 312 bool enabled;
439689c6
SS		 313 int r;
314
315 if (link->flags & IFF_LOOPBACK)
316 return 0;
317
482efedc
SS		 318 enabled = link_ipv6_enabled(link);
319 if (enabled) {
320 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", false);
321 if (r < 0)
57ad7607
ZJS		 322 return log_link_warning_errno(link, r, "Cannot enable IPv6: %m");
323
324 log_link_info(link, "IPv6 successfully enabled");
482efedc 325 }
439689c6
SS		 326
327 return 0;
328}
329
34bf3c00
YW		 330static bool link_is_enslaved(Link *link) {
331 if (link->flags & IFF_SLAVE)
332 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
333 return true;
334
34bf3c00
YW		 335 if (!link->network)
336 return false;
337
bb262ef0 338 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 339 return true;
340
bb262ef0
YW		 341 /* TODO: add conditions for other netdevs. */
342
34bf3c00
YW		 343 return false;
344}
345
45e11abf
YW		 346static void link_update_master_operstate(Link *link, NetDev *netdev) {
347 Link *master;
348
349 if (!netdev)
350 return;
351
7936917e
YW		 352 if (netdev->ifindex <= 0)
353 return;
354
45e11abf
YW		 355 if (link_get(link->manager, netdev->ifindex, &master) < 0)
356 return;
357
358 link_update_operstate(master, true);
359}
360
361void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 362 LinkOperationalState operstate;
1678fbb3
YW		 363 LinkCarrierState carrier_state;
364 LinkAddressState address_state;
35c5a9ca 365 _cleanup_strv_free_ char **p = NULL;
1678fbb3 366 uint8_t scope = RT_SCOPE_NOWHERE;
35c5a9ca 367 bool changed = false;
1678fbb3 368 Address *address;
14153d1b 369
84de38c5
TG		 370 assert(link);
371
372 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 373 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 374 else if (link_has_carrier(link)) {
1678fbb3
YW		 375 if (link_is_enslaved(link))
376 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 377 else
1678fbb3 378 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 379 } else if (link->flags & IFF_UP)
1678fbb3 380 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 381 else
1678fbb3 382 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 383
1678fbb3 384 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 385 Link *slave;
386
90e74a66 387 SET_FOREACH(slave, link->slaves) {
959f65d3 388 link_update_operstate(slave, false);
84de38c5 389
1678fbb3
YW		 390 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
391 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 392 }
959f65d3 393 }
84de38c5 394
90e74a66 395 SET_FOREACH(address, link->addresses) {
1678fbb3
YW		 396 if (!address_is_ready(address))
397 continue;
84de38c5 398
1678fbb3
YW		 399 if (address->scope < scope)
400 scope = address->scope;
401 }
84de38c5 402
1678fbb3 403 /* for operstate we also take foreign addresses into account */
90e74a66 404 SET_FOREACH(address, link->addresses_foreign) {
1678fbb3
YW		 405 if (!address_is_ready(address))
406 continue;
407
408 if (address->scope < scope)
409 scope = address->scope;
410 }
411
412 if (scope < RT_SCOPE_SITE)
413 /* universally accessible addresses found */
414 address_state = LINK_ADDRESS_STATE_ROUTABLE;
415 else if (scope < RT_SCOPE_HOST)
416 /* only link or site local addresses found */
417 address_state = LINK_ADDRESS_STATE_DEGRADED;
84de38c5 418 else
1678fbb3
YW		 419 /* no useful addresses found */
420 address_state = LINK_ADDRESS_STATE_OFF;
421
422 /* Mapping of address and carrier state vs operational state
423 * carrier state
424 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
425 * ------------------------------------------------------------------------------
426 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
427 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
428 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
429 */
84de38c5 430
1678fbb3
YW		 431 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
432 operstate = (LinkOperationalState) carrier_state;
433 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
434 operstate = LINK_OPERSTATE_ROUTABLE;
435 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
436 operstate = LINK_OPERSTATE_DEGRADED;
437 else
14153d1b
YW		 438 operstate = LINK_OPERSTATE_ENSLAVED;
439
35c5a9ca
YW		 440 if (link->carrier_state != carrier_state) {
441 link->carrier_state = carrier_state;
442 changed = true;
443 if (strv_extend(&p, "CarrierState") < 0)
444 log_oom();
445 }
959f65d3 446
35c5a9ca
YW		 447 if (link->address_state != address_state) {
448 link->address_state = address_state;
449 changed = true;
450 if (strv_extend(&p, "AddressState") < 0)
451 log_oom();
959f65d3
YW		 452 }
453
84de38c5
TG		 454 if (link->operstate != operstate) {
455 link->operstate = operstate;
35c5a9ca
YW		 456 changed = true;
457 if (strv_extend(&p, "OperationalState") < 0)
458 log_oom();
84de38c5 459 }
959f65d3 460
35c5a9ca
YW		 461 if (p)
462 link_send_changed_strv(link, p);
463 if (changed)
464 link_dirty(link);
465
45e11abf
YW		 466 if (also_update_master && link->network) {
467 link_update_master_operstate(link, link->network->bond);
468 link_update_master_operstate(link, link->network->bridge);
959f65d3 469 }
84de38c5
TG		 470}
471
51d18171
TG		 472#define FLAG_STRING(string, flag, old, new) \
473 (((old ^ new) & flag) \
474 ? ((old & flag) ? (" -" string) : (" +" string)) \
475 : "")
476
bb262ef0 477static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 478 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
479 uint8_t operstate;
480 int r;
481
482 assert(link);
483
484 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 485 if (r < 0)
486 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 487
1c4baffc 488 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 489 if (r < 0)
490 /* if we got a message without operstate, take it to mean
491 the state was unchanged */
492 operstate = link->kernel_operstate;
493
bb262ef0 494 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 495 return 0;
496
497 if (link->flags != flags) {
6a7a4e4d 498 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		 499 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
500 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
501 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
502 FLAG_STRING("UP", IFF_UP, link->flags, flags),
503 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
504 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
505 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
506 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
507 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
508 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
509 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
510 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
511 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
512 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
513 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
514 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
515 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
516 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
517 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
518
519 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
520 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
521 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
522 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
523 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
524 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
525 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
526 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
527
528 /* link flags are currently at most 18 bits, let's align to
529 * printing 20 */
530 if (unknown_flags_added)
79008bdd 531 log_link_debug(link,
6a7a4e4d 532 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 533 unknown_flags_added);
534
535 if (unknown_flags_removed)
79008bdd 536 log_link_debug(link,
6a7a4e4d 537 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 538 unknown_flags_removed);
539 }
540
541 link->flags = flags;
542 link->kernel_operstate = operstate;
543
959f65d3 544 link_update_operstate(link, true);
51d18171
TG		 545
546 return 0;
547}
548
1c4baffc 549static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 550 _cleanup_(link_unrefp) Link *link = NULL;
6cad256d 551 const char *ifname, *kind = NULL;
b710e6b6 552 unsigned short iftype;
572b21d9
YW		 553 int r, ifindex;
554 uint16_t type;
f579559b 555
0c2f9b84 556 assert(manager);
505f8da7 557 assert(message);
f579559b
TG		 558 assert(ret);
559
6cad256d
TJ		 560 /* check for link kind */
561 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
562 if (r == 0) {
db2f8a2e 563 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 564 r = sd_netlink_message_exit_container(message);
565 if (r < 0)
566 return r;
567 }
568
1c4baffc 569 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 570 if (r < 0)
571 return r;
572 else if (type != RTM_NEWLINK)
573 return -EINVAL;
574
575 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
576 if (r < 0)
577 return r;
578 else if (ifindex <= 0)
579 return -EINVAL;
580
b710e6b6
LP		 581 r = sd_rtnl_message_link_get_type(message, &iftype);
582 if (r < 0)
583 return r;
584
1c4baffc 585 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 586 if (r < 0)
587 return r;
588
17f9c355 589 link = new(Link, 1);
f579559b
TG		 590 if (!link)
591 return -ENOMEM;
592
17f9c355
YW		 593 *link = (Link) {
594 .n_ref = 1,
595 .manager = manager,
596 .state = LINK_STATE_PENDING,
17f9c355
YW		 597 .ifindex = ifindex,
598 .iftype = iftype,
15761549
YW		 599
600 .n_dns = (unsigned) -1,
601 .dns_default_route = -1,
602 .llmnr = _RESOLVE_SUPPORT_INVALID,
603 .mdns = _RESOLVE_SUPPORT_INVALID,
604 .dnssec_mode = _DNSSEC_MODE_INVALID,
605 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
17f9c355
YW		 606 };
607
505f8da7
TG		 608 link->ifname = strdup(ifname);
609 if (!link->ifname)
610 return -ENOMEM;
f579559b 611
6cad256d
TJ		 612 if (kind) {
613 link->kind = strdup(kind);
614 if (!link->kind)
615 return -ENOMEM;
616 }
617
cbff7170
TJ		 618 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
619 if (r < 0)
620 log_link_debug_errno(link, r, "New device has no master, continuing without");
621
1c4baffc 622 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 623 if (r < 0)
34437b4f 624 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 625
c643bda5 626 r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac);
4bb7cc82
YW		 627 if (r < 0)
628 log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
629
c643bda5
YW		 630 r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver);
631 if (r < 0)
632 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
633
572b21d9
YW		 634 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &link->alternative_names);
635 if (r < 0 && r != -ENODATA)
636 return r;
637
34437b4f 638 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 639 return -ENOMEM;
fe8db0c5 640
34437b4f 641 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 642 return -ENOMEM;
643
34437b4f 644 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 645 return -ENOMEM;
646
d5099efc 647 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 648 if (r < 0)
649 return r;
650
651 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 652 if (r < 0)
653 return r;
654
bb262ef0 655 r = link_update_flags(link, message, false);
51d18171
TG		 656 if (r < 0)
657 return r;
658
1cc6c93a 659 *ret = TAKE_PTR(link);
f579559b
TG		 660
661 return 0;
662}
663
15761549
YW		 664void link_ntp_settings_clear(Link *link) {
665 link->ntp = strv_free(link->ntp);
666}
667
668void link_dns_settings_clear(Link *link) {
e77bd3fd
YW		 669 if (link->n_dns != (unsigned) -1)
670 for (unsigned i = 0; i < link->n_dns; i++)
671 in_addr_full_free(link->dns[i]);
15761549
YW		 672 link->dns = mfree(link->dns);
673 link->n_dns = (unsigned) -1;
674
675 link->search_domains = ordered_set_free_free(link->search_domains);
676 link->route_domains = ordered_set_free_free(link->route_domains);
677
678 link->dns_default_route = -1;
679 link->llmnr = _RESOLVE_SUPPORT_INVALID;
680 link->mdns = _RESOLVE_SUPPORT_INVALID;
681 link->dnssec_mode = _DNSSEC_MODE_INVALID;
682 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
683
684 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
685}
686
1a6bb31f
YW		 687static void link_free_engines(Link *link) {
688 if (!link)
689 return;
690
691 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
692 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
693 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
1a6bb31f
YW		 694
695 link->lldp = sd_lldp_unref(link->lldp);
696
697 ndisc_flush(link);
698
699 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
700 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 701 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
1a6bb31f
YW		 702 link->ndisc = sd_ndisc_unref(link->ndisc);
703 link->radv = sd_radv_unref(link->radv);
704}
705
8301aa0b 706static Link *link_free(Link *link) {
428fd0a7
TG		 707 Address *address;
708
8301aa0b 709 assert(link);
f579559b 710
15761549
YW		 711 link_ntp_settings_clear(link);
712 link_dns_settings_clear(link);
713
8eec0b9d
YW		 714 link->routes = set_free(link->routes);
715 link->routes_foreign = set_free(link->routes_foreign);
6e537f62
YW		 716 link->dhcp_routes = set_free(link->dhcp_routes);
717 link->dhcp_routes_old = set_free(link->dhcp_routes_old);
1633c457
YW		 718 link->dhcp6_routes = set_free(link->dhcp6_routes);
719 link->dhcp6_routes_old = set_free(link->dhcp6_routes_old);
720 link->dhcp6_pd_routes = set_free(link->dhcp6_pd_routes);
721 link->dhcp6_pd_routes_old = set_free(link->dhcp6_pd_routes_old);
69203fba 722 link->ndisc_routes = set_free(link->ndisc_routes);
adda1ed9 723
8eec0b9d
YW		 724 link->nexthops = set_free(link->nexthops);
725 link->nexthops_foreign = set_free(link->nexthops_foreign);
c16c7808 726
8eec0b9d
YW		 727 link->neighbors = set_free(link->neighbors);
728 link->neighbors_foreign = set_free(link->neighbors_foreign);
d1bdafd2 729
8eec0b9d
YW		 730 link->addresses = set_free(link->addresses);
731 link->addresses_foreign = set_free(link->addresses_foreign);
e5526518 732 link->static_addresses = set_free(link->static_addresses);
1633c457
YW		 733 link->dhcp6_addresses = set_free(link->dhcp6_addresses);
734 link->dhcp6_addresses_old = set_free(link->dhcp6_addresses_old);
735 link->dhcp6_pd_addresses = set_free(link->dhcp6_pd_addresses);
736 link->dhcp6_pd_addresses_old = set_free(link->dhcp6_pd_addresses_old);
69203fba 737 link->ndisc_addresses = set_free(link->ndisc_addresses);
adda1ed9 738
11bf3cce
LP		 739 while ((address = link->pool_addresses)) {
740 LIST_REMOVE(addresses, link->pool_addresses, address);
741 address_free(address);
742 }
743
7272b25e 744 link_lldp_emit_stop(link);
1a6bb31f 745 link_free_engines(link);
68a8723c 746 free(link->lease_file);
49699bac
SS		 747 free(link->lldp_file);
748
c166a070 749 free(link->ifname);
572b21d9 750 strv_free(link->alternative_names);
ceac4078 751 free(link->kind);
8d968fdd 752 free(link->ssid);
c643bda5 753 free(link->driver);
6cad256d 754
db2f8a2e 755 (void) unlink(link->state_file);
fe8db0c5 756 free(link->state_file);
c166a070 757
51517f9e 758 sd_device_unref(link->sd_device);
b5db00e5 759
0d4ad91d 760 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 761 hashmap_free(link->bound_by_links);
762
5f707e12 763 set_free_with_destructor(link->slaves, link_unref);
033295c1 764
c9c908a6
YW		 765 network_unref(link->network);
766
8301aa0b 767 return mfree(link);
14b746f7
TG		 768}
769
8301aa0b 770DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 771
11a7f229
TG		 772int link_get(Manager *m, int ifindex, Link **ret) {
773 Link *link;
11a7f229
TG		 774
775 assert(m);
e856ed00 776 assert(ifindex > 0);
11a7f229
TG		 777 assert(ret);
778
ae06ab10 779 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 780 if (!link)
781 return -ENODEV;
782
783 *ret = link;
784
785 return 0;
786}
787
af9ba57a 788void link_set_state(Link *link, LinkState state) {
e331e246
TG		 789 assert(link);
790
791 if (link->state == state)
792 return;
793
0beb9542
YW		 794 log_link_debug(link, "State changed: %s -> %s",
795 link_state_to_string(link->state),
796 link_state_to_string(state));
797
e331e246
TG		 798 link->state = state;
799
800 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 801}
802
57bd6899
TG		 803static void link_enter_unmanaged(Link *link) {
804 assert(link);
805
e331e246 806 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 807
84de38c5 808 link_dirty(link);
57bd6899
TG		 809}
810
95355a28 811int link_stop_clients(Link *link, bool may_keep_dhcp) {
111bb8f9 812 int r = 0, k;
051e77ca 813 Address *ad;
111bb8f9
TG		 814
815 assert(link);
816 assert(link->manager);
817 assert(link->manager->event);
818
80060352
ZJS		 819 bool keep_dhcp = may_keep_dhcp &&
820 link->network &&
821 (link->manager->restarting ||
822 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
823
824 if (link->dhcp_client && !keep_dhcp) {
111bb8f9 825 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 826 if (k < 0)
36c7d709 827 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 828 }
829
ba179154 830 if (link->ipv4ll) {
111bb8f9 831 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 832 if (k < 0)
36c7d709 833 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 834 }
835
051e77ca
SS		 836 if (link->network)
837 LIST_FOREACH(addresses, ad, link->network->static_addresses)
838 if (ad->acd && sd_ipv4acd_is_running(ad->acd) == 0) {
839 k = sd_ipv4acd_stop(ad->acd);
840 if (k < 0)
841 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
842 }
843
f5a8c43f
TG		 844 if (link->dhcp6_client) {
845 k = sd_dhcp6_client_stop(link->dhcp6_client);
846 if (k < 0)
36c7d709 847 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 848 }
4138fb2c 849
1633c457
YW		 850 if (link_dhcp6_pd_is_enabled(link)) {
851 k = dhcp6_pd_remove(link);
852 if (k < 0)
853 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
854 }
855
1e7a0e21
LP		 856 if (link->ndisc) {
857 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 858 if (k < 0)
36c7d709 859 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 860 }
861
7465dd22 862 if (link->radv) {
290696e5 863 k = sd_radv_stop(link->radv);
7465dd22
PF		 864 if (k < 0)
865 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
866 }
867
7272b25e 868 link_lldp_emit_stop(link);
111bb8f9
TG		 869 return r;
870}
871
b22d8a00 872void link_enter_failed(Link *link) {
ef1ba606 873 assert(link);
f882c247 874
370e9930 875 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 876 return;
877
6a7a4e4d 878 log_link_warning(link, "Failed");
449f7554 879
e331e246 880 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 881
95355a28 882 link_stop_clients(link, false);
111bb8f9 883
84de38c5 884 link_dirty(link);
f882c247
TG		 885}
886
7033af49
YW		 887static int link_join_netdevs_after_configured(Link *link) {
888 NetDev *netdev;
7033af49
YW		 889 int r;
890
90e74a66 891 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7033af49
YW		 892 if (netdev->ifindex > 0)
893 /* Assume already enslaved. */
894 continue;
895
896 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
897 continue;
898
899 log_struct(LOG_DEBUG,
900 LOG_LINK_INTERFACE(link),
901 LOG_NETDEV_INTERFACE(netdev),
902 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
903
904 r = netdev_join(netdev, link, NULL);
905 if (r < 0)
906 return log_struct_errno(LOG_WARNING, r,
907 LOG_LINK_INTERFACE(link),
908 LOG_NETDEV_INTERFACE(netdev),
909 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
910 }
911
912 return 0;
913}
914
e3a7b048 915static void link_enter_configured(Link *link) {
dd43110f
TG		 916 assert(link);
917 assert(link->network);
e3a7b048 918
289e6774 919 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 920 return;
dd43110f 921
e331e246 922 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 923
7033af49
YW		 924 (void) link_join_netdevs_after_configured(link);
925
84de38c5 926 link_dirty(link);
dd43110f
TG		 927}
928
302a796f 929static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 930 int r;
931
1046bf9b 932 assert(link);
7715629e 933 assert(link->route_messages > 0);
289e6774
WKI		 934 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
935 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 936
7715629e 937 link->route_messages--;
f882c247 938
77a008c0 939 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 940 return 1;
941
1c4baffc 942 r = sd_netlink_message_get_errno(m);
4ff296b0 943 if (r < 0 && r != -EEXIST) {
5ecb131d 944 log_link_message_warning_errno(link, m, r, "Could not set route");
4ff296b0
YW		 945 link_enter_failed(link);
946 return 1;
947 }
f882c247 948
7715629e 949 if (link->route_messages == 0) {
6a7a4e4d 950 log_link_debug(link, "Routes set");
7715629e 951 link->static_routes_configured = true;
c133770a 952 link_set_nexthop(link);
dd3efc09 953 }
f882c247
TG		 954
955 return 1;
956}
957
b5799eeb 958int link_request_set_routes(Link *link) {
bf61b05a
LP		 959 enum {
960 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
961 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
962 _PHASE_MAX
963 } phase;
a6cc569e 964 Route *rt;
f882c247
TG		 965 int r;
966
967 assert(link);
968 assert(link->network);
289e6774 969 assert(link->state != _LINK_STATE_INVALID);
f882c247 970
2428613f 971 link->static_routes_configured = false;
27c34f73 972
e5526518
YW		 973 if (!link->addresses_ready)
974 return 0;
975
4e2ef9d9
YW		 976 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
977 /* During configuring addresses, the link lost its carrier. As networkd is dropping
978 * the addresses now, let's not configure the routes either. */
979 return 0;
980
c0ec4746 981 r = link_set_routing_policy_rules(link);
f3ef324d
YW		 982 if (r < 0)
983 return r;
f882c247 984
bf61b05a
LP		 985 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
986 for (phase = 0; phase < _PHASE_MAX; phase++)
987 LIST_FOREACH(routes, rt, link->network->static_routes) {
1985c54f
YW		 988 if (rt->gateway_from_dhcp)
989 continue;
0d34228f 990
6ff5cc6b 991 if ((in_addr_is_null(rt->family, &rt->gw) && ordered_set_isempty(rt->multipath_routes)) != (phase == PHASE_NON_GATEWAY))
bf61b05a 992 continue;
a6cc569e 993
80b0e860 994 r = route_configure(rt, link, route_handler, NULL);
4ff296b0
YW		 995 if (r < 0)
996 return log_link_warning_errno(link, r, "Could not set routes: %m");
c4423317
YW		 997 if (r > 0)
998 link->route_messages++;
0d34228f 999 }
f5be5601 1000
7715629e
ST		 1001 if (link->route_messages == 0) {
1002 link->static_routes_configured = true;
c133770a 1003 link_set_nexthop(link);
b425c3ae 1004 } else {
6a7a4e4d 1005 log_link_debug(link, "Setting routes");
b425c3ae
YW		 1006 link_set_state(link, LINK_STATE_CONFIGURING);
1007 }
f882c247
TG		 1008
1009 return 0;
1010}
1011
6accfd31
DA		 1012void link_check_ready(Link *link) {
1013 Address *a;
6accfd31
DA		 1014
1015 assert(link);
1016
5f58af25
YW		 1017 if (link->state == LINK_STATE_CONFIGURED)
1018 return;
1019
1020 if (link->state != LINK_STATE_CONFIGURING) {
1021 log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31 1022 return;
39373cb9 1023 }
6accfd31
DA		 1024
1025 if (!link->network)
1026 return;
1027
39373cb9
YW		 1028 if (!link->addresses_configured) {
1029 log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 1030 return;
39373cb9 1031 }
6accfd31 1032
39373cb9
YW		 1033 if (!link->neighbors_configured) {
1034 log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
6accfd31 1035 return;
39373cb9 1036 }
6accfd31 1037
90e74a66 1038 SET_FOREACH(a, link->addresses)
39373cb9
YW		 1039 if (!address_is_ready(a)) {
1040 _cleanup_free_ char *str = NULL;
1041
1042 (void) in_addr_to_string(a->family, &a->in_addr, &str);
1043 log_link_debug(link, "%s(): an address %s/%d is not ready.", __func__, strnull(str), a->prefixlen);
6aa5773b 1044 return;
39373cb9 1045 }
6aa5773b 1046
39373cb9
YW		 1047 if (!link->static_routes_configured) {
1048 log_link_debug(link, "%s(): static routes are not configured.", __func__);
6accfd31 1049 return;
39373cb9 1050 }
6accfd31 1051
39373cb9
YW		 1052 if (!link->static_nexthops_configured) {
1053 log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 1054 return;
39373cb9 1055 }
c16c7808 1056
39373cb9
YW		 1057 if (!link->routing_policy_rules_configured) {
1058 log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 1059 return;
39373cb9 1060 }
6accfd31 1061
39373cb9
YW		 1062 if (!link->tc_configured) {
1063 log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
4ecdcb07 1064 return;
39373cb9 1065 }
4ecdcb07 1066
39373cb9
YW		 1067 if (!link->sr_iov_configured) {
1068 log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 1069 return;
39373cb9 1070 }
518cd6b5 1071
1f241589
YW		 1072 if (!link->bridge_mdb_configured) {
1073 log_link_debug(link, "%s(): Bridge MDB is not configured.", __func__);
1074 return;
1075 }
1076
463797c1 1077 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
50550722
YW		 1078 bool has_ndisc_address = false;
1079 NDiscAddress *n;
6accfd31 1080
1c09d84e 1081 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !link->ipv4ll_address_configured) {
39373cb9 1082 log_link_debug(link, "%s(): IPv4LL is not configured.", __func__);
463797c1 1083 return;
39373cb9 1084 }
6accfd31 1085
463797c1 1086 if (link_ipv6ll_enabled(link) &&
39373cb9
YW		 1087 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
1088 log_link_debug(link, "%s(): IPv6LL is not configured.", __func__);
463797c1 1089 return;
39373cb9 1090 }
6accfd31 1091
90e74a66 1092 SET_FOREACH(n, link->ndisc_addresses)
50550722
YW		 1093 if (!n->marked) {
1094 has_ndisc_address = true;
1095 break;
1096 }
1097
15797d6a 1098 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
50550722 1099 !link->dhcp_address && set_isempty(link->dhcp6_addresses) && !has_ndisc_address &&
15797d6a
YW		 1100 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
1101 log_link_debug(link, "%s(): DHCP4 or DHCP6 is enabled but no dynamic address is assigned yet.", __func__);
659ad3a0
YW		 1102 return;
1103 }
1104
1633c457 1105 if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_dhcp6_pd_is_enabled(link) || link_ipv6_accept_ra_enabled(link)) {
39373cb9
YW		 1106 if (!link->dhcp4_configured &&
1107 !(link->dhcp6_address_configured && link->dhcp6_route_configured) &&
1108 !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) &&
d98c546d 1109 !(link->ndisc_addresses_configured && link->ndisc_routes_configured) &&
1c09d84e 1110 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
39373cb9
YW		 1111 /* When DHCP or RA is enabled, at least one protocol must provide an address, or
1112 * an IPv4ll fallback address must be configured. */
1113 log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
1114 return;
1115 }
1116
d98c546d 1117 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		 1118 __func__,
1119 yes_no(link->dhcp4_configured),
1120 yes_no(link->dhcp6_address_configured),
1121 yes_no(link->dhcp6_route_configured),
1122 yes_no(link->dhcp6_pd_address_configured),
1123 yes_no(link->dhcp6_pd_route_configured),
d98c546d
YW		 1124 yes_no(link->ndisc_addresses_configured),
1125 yes_no(link->ndisc_routes_configured));
39373cb9 1126 }
463797c1 1127 }
6accfd31 1128
5f58af25 1129 link_enter_configured(link);
6accfd31
DA		 1130
1131 return;
1132}
1133
e5526518
YW		 1134static int link_set_bridge_fdb(Link *link) {
1135 FdbEntry *fdb_entry;
1136 int r;
1137
1138 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1139 r = fdb_entry_configure(link, fdb_entry);
1140 if (r < 0)
1141 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
1142 }
1143
1144 return 0;
1145}
1146
1147static int static_address_ready_callback(Address *address) {
1148 Address *a;
e5526518
YW		 1149 Link *link;
1150
1151 assert(address);
1152 assert(address->link);
1153
1154 link = address->link;
1155
1156 if (!link->addresses_configured)
1157 return 0;
1158
90e74a66 1159 SET_FOREACH(a, link->static_addresses)
e5526518
YW		 1160 if (!address_is_ready(a)) {
1161 _cleanup_free_ char *str = NULL;
1162
1163 (void) in_addr_to_string(a->family, &a->in_addr, &str);
1164 log_link_debug(link, "an address %s/%u is not ready", strnull(str), a->prefixlen);
1165 return 0;
1166 }
1167
1168 /* This should not be called again */
90e74a66 1169 SET_FOREACH(a, link->static_addresses)
e5526518
YW		 1170 a->callback = NULL;
1171
1172 link->addresses_ready = true;
1173
1174 return link_request_set_routes(link);
1175}
1176
3650173f 1177static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1178 int r;
1179
4958aee4 1180 assert(rtnl);
f5be5601
TG		 1181 assert(m);
1182 assert(link);
1183 assert(link->ifname);
7715629e 1184 assert(link->address_messages > 0);
289e6774 1185 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1186 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1187
7715629e 1188 link->address_messages--;
f882c247 1189
5da8149f 1190 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1191 return 1;
1192
1c4baffc 1193 r = sd_netlink_message_get_errno(m);
4ff296b0 1194 if (r < 0 && r != -EEXIST) {
5ecb131d 1195 log_link_message_warning_errno(link, m, r, "Could not set address");
4ff296b0
YW		 1196 link_enter_failed(link);
1197 return 1;
1198 } else if (r >= 0)
1199 (void) manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1200
7715629e 1201 if (link->address_messages == 0) {
e5526518
YW		 1202 Address *a;
1203
6a7a4e4d 1204 log_link_debug(link, "Addresses set");
c42ff3a1 1205 link->addresses_configured = true;
e5526518
YW		 1206
1207 /* When all static addresses are already ready, then static_address_ready_callback()
1208 * will not be called automatically. So, call it here. */
1209 a = set_first(link->static_addresses);
1210 if (!a) {
1211 log_link_warning(link, "No static address is stored.");
1212 link_enter_failed(link);
1213 return 1;
1214 }
1215 if (!a->callback) {
1216 log_link_warning(link, "Address ready callback is not set.");
1217 link_enter_failed(link);
1218 return 1;
1219 }
1220 r = a->callback(a);
1221 if (r < 0)
1222 link_enter_failed(link);
dd3efc09 1223 }
f882c247
TG		 1224
1225 return 1;
1226}
1227
e5526518
YW		 1228static int static_address_configure(Address *address, Link *link, bool update) {
1229 Address *ret;
197e2809 1230 int r;
f6bb7ac5 1231
e5526518
YW		 1232 assert(address);
1233 assert(link);
1234
1235 r = address_configure(address, link, address_handler, update, &ret);
1236 if (r < 0)
1237 return log_link_warning_errno(link, r, "Could not configure static address: %m");
1238
1239 link->address_messages++;
1240
1241 r = set_ensure_put(&link->static_addresses, &address_hash_ops, ret);
1242 if (r < 0)
1243 return log_link_warning_errno(link, r, "Failed to store static address: %m");
1244
1245 ret->callback = static_address_ready_callback;
f6bb7ac5 1246
197e2809 1247 return 0;
f6bb7ac5
TJ		 1248}
1249
289e6774 1250static int link_request_set_addresses(Link *link) {
a6cc569e 1251 Address *ad;
bd6379ec 1252 Prefix *p;
f882c247
TG		 1253 int r;
1254
1255 assert(link);
1256 assert(link->network);
f5be5601 1257 assert(link->state != _LINK_STATE_INVALID);
f882c247 1258
9b966cee
YW		 1259 if (link->address_remove_messages != 0) {
1260 log_link_debug(link, "Removing old addresses, new addresses will be configured later.");
1261 link->request_static_addresses = true;
1262 return 0;
1263 }
1264
2428613f 1265 /* Reset all *_configured flags we are configuring. */
9b966cee 1266 link->request_static_addresses = false;
2428613f 1267 link->addresses_configured = false;
6aa5773b 1268 link->addresses_ready = false;
2428613f
YW		 1269 link->neighbors_configured = false;
1270 link->static_routes_configured = false;
c16c7808 1271 link->static_nexthops_configured = false;
2428613f
YW		 1272 link->routing_policy_rules_configured = false;
1273
f6bb7ac5
TJ		 1274 r = link_set_bridge_fdb(link);
1275 if (r < 0)
1276 return r;
1277
1f241589
YW		 1278 r = link_set_bridge_mdb(link);
1279 if (r < 0)
1280 return r;
1281
58f1fe9a 1282 r = link_set_neighbors(link);
f3ef324d
YW		 1283 if (r < 0)
1284 return r;
e4a71bf3 1285
3d3d4255 1286 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1287 bool update;
1288
6f5d73ab
YW		 1289 if (ad->family == AF_INET6 && !in_addr_is_null(ad->family, &ad->in_addr_peer))
1290 update = address_get(link, ad->family, &ad->in_addr_peer, ad->prefixlen, NULL) > 0;
1291 else
1292 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
a47a6dae 1293
e5526518 1294 r = static_address_configure(ad, link, update);
4ff296b0 1295 if (r < 0)
e5526518 1296 return r;
95b74ef6
SS		 1297 }
1298
61c0ef4f 1299 if (link->network->router_prefix_delegation & RADV_PREFIX_DELEGATION_STATIC)
bd6379ec
SS		 1300 LIST_FOREACH(prefixes, p, link->network->static_prefixes) {
1301 _cleanup_(address_freep) Address *address = NULL;
1302
1303 if (!p->assign)
1304 continue;
1305
1306 r = address_new(&address);
1307 if (r < 0)
e5526518 1308 return log_oom();
bd6379ec
SS		 1309
1310 r = sd_radv_prefix_get_prefix(p->radv_prefix, &address->in_addr.in6, &address->prefixlen);
1311 if (r < 0)
e5526518 1312 return log_link_warning_errno(link, r, "Could not get RA prefix: %m");
bd6379ec
SS		 1313
1314 r = generate_ipv6_eui_64_address(link, &address->in_addr.in6);
1315 if (r < 0)
e5526518 1316 return log_link_warning_errno(link, r, "Could not generate EUI64 address: %m");
bd6379ec
SS		 1317
1318 address->family = AF_INET6;
e5526518 1319 r = static_address_configure(address, link, true);
bd6379ec 1320 if (r < 0)
e5526518 1321 return r;
bd6379ec
SS		 1322 }
1323
fe2bc17c
YW		 1324 r = link_set_address_labels(link);
1325 if (r < 0)
1326 return r;
f882c247 1327
e5526518 1328 /* now that we can figure out a default address for the dhcp server, start it */
708c425d 1329 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
8fcf1d61 1330 r = dhcp4_server_configure(link);
4ff296b0 1331 if (r < 0)
d4cdbea5 1332 return r;
6a7a4e4d 1333 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1334 }
1335
c42ff3a1
WKI		 1336 if (link->address_messages == 0) {
1337 link->addresses_configured = true;
e5526518
YW		 1338 link->addresses_ready = true;
1339 r = link_request_set_routes(link);
1340 if (r < 0)
1341 return r;
b425c3ae 1342 } else {
6a7a4e4d 1343 log_link_debug(link, "Setting addresses");
b425c3ae
YW		 1344 link_set_state(link, LINK_STATE_CONFIGURING);
1345 }
431ca2ce 1346
f882c247
TG		 1347 return 0;
1348}
1349
13b498f9 1350static int link_set_bridge_vlan(Link *link) {
86e2be7b 1351 int r;
13b498f9
TJ		 1352
1353 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1354 if (r < 0)
1355 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1356
1357 return r;
1358}
1359
a60a720c 1360static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1361 int r;
1362
1363 if (!link_proxy_arp_enabled(link))
1364 return 0;
1365
62e021a9 1366 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1367 if (r < 0)
1368 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1369
1370 return 0;
1371}
1372
3a390124 1373static int link_configure_continue(Link *link);
55dc8c4a 1374
302a796f 1375static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1376 int r;
1377
1378 assert(m);
1379 assert(link);
1380 assert(link->ifname);
1381
55dc8c4a
YW		 1382 link->setting_mtu = false;
1383
5da8149f 1384 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1385 return 1;
1386
1c4baffc 1387 r = sd_netlink_message_get_errno(m);
4ff296b0 1388 if (r < 0)
5ecb131d 1389 log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring");
4ff296b0
YW		 1390 else
1391 log_link_debug(link, "Setting MTU done.");
55dc8c4a 1392
4ff296b0 1393 if (link->state == LINK_STATE_INITIALIZED) {
3a390124 1394 r = link_configure_continue(link);
4ff296b0
YW		 1395 if (r < 0)
1396 link_enter_failed(link);
1397 }
4f882b2a
TG		 1398
1399 return 1;
1400}
1401
933c70a0 1402int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1403 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1404 int r;
1405
1406 assert(link);
1407 assert(link->manager);
1408 assert(link->manager->rtnl);
1409
40288ece
YW		 1410 if (mtu == 0 || link->setting_mtu)
1411 return 0;
1412
933c70a0 1413 if (link->mtu == mtu)
ee493106
YW		 1414 return 0;
1415
6a7a4e4d 1416 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1417
6a7a4e4d
LP		 1418 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1419 if (r < 0)
1420 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1421
44b598a1 1422 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1423 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1424 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1425
1426 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
d236718c 1427 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes");
44b598a1 1428
72c2500b 1429 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1430 }
1431
1c4baffc 1432 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1433 if (r < 0)
1434 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1435
302a796f
YW		 1436 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1437 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1438 if (r < 0)
1439 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1440
ae941762 1441 link_ref(link);
1046bf9b 1442 link->setting_mtu = true;
b226d99b 1443
4f882b2a
TG		 1444 return 0;
1445}
1446
f6fcc1c2
YW		 1447static bool link_reduces_vlan_mtu(Link *link) {
1448 /* See netif_reduces_vlan_mtu() in kernel. */
1449 return streq_ptr(link->kind, "macsec");
1450}
1451
1452static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1453 uint32_t mtu = 0;
1454 NetDev *dev;
f6fcc1c2 1455
90e74a66 1456 HASHMAP_FOREACH(dev, link->network->stacked_netdevs)
f6fcc1c2
YW		 1457 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1458 /* See vlan_dev_change_mtu() in kernel. */
1459 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1460
1461 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1462 /* See macvlan_change_mtu() in kernel. */
1463 mtu = dev->mtu;
1464
1465 return mtu;
1466}
1467
1468static int link_configure_mtu(Link *link) {
1469 uint32_t mtu;
1470
1471 assert(link);
1472 assert(link->network);
1473
1474 if (link->network->mtu > 0)
1475 return link_set_mtu(link, link->network->mtu);
1476
1477 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1478 if (link->mtu >= mtu)
1479 return 0;
1480
1481 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1482 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1483 link->mtu, mtu);
1484
1485 return link_set_mtu(link, mtu);
1486}
1487
302a796f 1488static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1489 int r;
1490
1491 assert(m);
1492 assert(link);
1493 assert(link->ifname);
1494
1495 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1496 return 1;
1497
1498 r = sd_netlink_message_get_errno(m);
1499 if (r < 0)
5ecb131d 1500 log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring");
99d2baa2
SS		 1501
1502 return 1;
1503}
1504
1505static int link_set_flags(Link *link) {
1506 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1507 unsigned ifi_change = 0;
1508 unsigned ifi_flags = 0;
1509 int r;
1510
1511 assert(link);
1512 assert(link->manager);
1513 assert(link->manager->rtnl);
1514
1515 if (link->flags & IFF_LOOPBACK)
1516 return 0;
1517
1518 if (!link->network)
1519 return 0;
1520
866e6b7a 1521 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1522 return 0;
1523
1524 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1525 if (r < 0)
1526 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1527
1528 if (link->network->arp >= 0) {
1529 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1530 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1531 }
1532
1533 if (link->network->multicast >= 0) {
1534 ifi_change |= IFF_MULTICAST;
1535 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1536 }
1537
866e6b7a
SS		 1538 if (link->network->allmulticast >= 0) {
1539 ifi_change |= IFF_ALLMULTI;
1540 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1541 }
1542
99d2baa2
SS		 1543 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1544 if (r < 0)
1545 return log_link_error_errno(link, r, "Could not set link flags: %m");
1546
302a796f
YW		 1547 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1548 link_netlink_destroy_callback, link);
99d2baa2
SS		 1549 if (r < 0)
1550 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1551
1552 link_ref(link);
1553
1554 return 0;
1555}
1556
e7ab854c
TG		 1557static int link_acquire_ipv6_conf(Link *link) {
1558 int r;
1559
1560 assert(link);
1561
e7ab854c 1562 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1563 assert(link->ndisc);
e7ab854c
TG		 1564
1565 log_link_debug(link, "Discovering IPv6 routers");
1566
1e7a0e21 1567 r = sd_ndisc_start(link->ndisc);
63348d13 1568 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1569 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1570 }
1571
7465dd22
PF		 1572 if (link_radv_enabled(link)) {
1573 assert(link->radv);
1574 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1575
1576 log_link_debug(link, "Starting IPv6 Router Advertisements");
1577
fd3ef936
YW		 1578 r = radv_emit_dns(link);
1579 if (r < 0)
1580 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
1581
7465dd22
PF		 1582 r = sd_radv_start(link->radv);
1583 if (r < 0 && r != -EBUSY)
1584 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1585 }
1586
838d39af
SS		 1587 if (link_dhcp6_enabled(link) && IN_SET(link->network->dhcp6_without_ra,
1588 DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST,
1589 DHCP6_CLIENT_START_MODE_SOLICIT)) {
cd305af1
SS		 1590 assert(link->dhcp6_client);
1591 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1592
838d39af 1593 r = dhcp6_request_address(link, link->network->dhcp6_without_ra == DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST);
cd305af1 1594 if (r < 0 && r != -EBUSY)
1633c457 1595 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
cd305af1
SS		 1596 else
1597 log_link_debug(link, "Acquiring DHCPv6 lease");
1598 }
1599
1633c457
YW		 1600 r = dhcp6_request_prefix_delegation(link);
1601 if (r < 0)
1602 return log_link_warning_errno(link, r, "Failed to request DHCPv6 prefix delegation: %m");
10752343 1603
e7ab854c
TG		 1604 return 0;
1605}
1606
6fc25497 1607static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1608 int r;
1609
1610 assert(link);
ff254138
TG		 1611 assert(link->manager);
1612 assert(link->manager->event);
1613
910feb78 1614 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1615 assert(link->ipv4ll);
ff254138 1616
6a7a4e4d 1617 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1618
1619 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1620 if (r < 0)
1621 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1622 }
1623
78c958f8 1624 if (link_dhcp4_enabled(link)) {
eb34d4af 1625 assert(link->dhcp_client);
ff254138 1626
6a7a4e4d 1627 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1628
5c1d3fc9 1629 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1630 if (r < 0)
1631 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1632 }
ff254138 1633
6fc25497
SS		 1634 return 0;
1635}
1636
1637static int link_acquire_conf(Link *link) {
1638 int r;
1639
1640 assert(link);
1641
1642 r = link_acquire_ipv4_conf(link);
1643 if (r < 0)
1644 return r;
1645
3f7cc080 1646 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1647 r = link_acquire_ipv6_conf(link);
1648 if (r < 0)
1649 return r;
1650 }
1651
7272b25e
LP		 1652 if (link_lldp_emit_enabled(link)) {
1653 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1654 if (r < 0)
1655 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1656 }
1657
ff254138
TG		 1658 return 0;
1659}
1660
a61bb41c 1661bool link_has_carrier(Link *link) {
deb2e523
TG		 1662 /* see Documentation/networking/operstates.txt in the kernel sources */
1663
a61bb41c 1664 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1665 return true;
1666
a61bb41c 1667 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1668 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1669 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1670 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1671 return true;
1672
1673 return false;
1674}
1675
0e2fdb83
SS		 1676static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1677 int r;
1678
1679 assert(link);
1680
9524014e
DS		 1681 link->setting_genmode = false;
1682
0e2fdb83
SS		 1683 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1684 return 1;
1685
1686 r = sd_netlink_message_get_errno(m);
1687 if (r < 0)
5ecb131d 1688 log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring");
9524014e
DS		 1689 else
1690 log_link_debug(link, "Setting address genmode done.");
1691
1692 if (link->state == LINK_STATE_INITIALIZED) {
1693 r = link_configure_continue(link);
1694 if (r < 0)
1695 link_enter_failed(link);
1696 }
0e2fdb83
SS		 1697
1698 return 1;
1699}
1700
1701static int link_configure_addrgen_mode(Link *link) {
1702 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1703 uint8_t ipv6ll_mode;
1704 int r;
1705
1706 assert(link);
1707 assert(link->network);
1708 assert(link->manager);
1709 assert(link->manager->rtnl);
1710
9524014e 1711 if (!socket_ipv6_is_supported() || link->setting_genmode)
9f6e82e6
YW		 1712 return 0;
1713
0e2fdb83
SS		 1714 log_link_debug(link, "Setting address genmode for link");
1715
1716 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1717 if (r < 0)
1718 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1719
1720 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1721 if (r < 0)
1722 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1723
1724 r = sd_netlink_message_open_container(req, AF_INET6);
1725 if (r < 0)
1726 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1727
1728 if (!link_ipv6ll_enabled(link))
1729 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
6f6296b9 1730 else if (link->network->ipv6ll_address_gen_mode < 0) {
a6f1848a
SS		 1731 r = sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL);
1732 if (r < 0) {
1733 /* The file may not exist. And even if it exists, when stable_secret is unset,
1734 * reading the file fails with EIO. */
1735 log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret: %m");
1736
1737 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1738 } else
1739 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1740 } else
6f6296b9 1741 ipv6ll_mode = link->network->ipv6ll_address_gen_mode;
0e2fdb83
SS		 1742
1743 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1744 if (r < 0)
1745 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1746
1747 r = sd_netlink_message_close_container(req);
1748 if (r < 0)
1749 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1750
1751 r = sd_netlink_message_close_container(req);
1752 if (r < 0)
1753 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1754
1755 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1756 link_netlink_destroy_callback, link);
1757 if (r < 0)
1758 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1759
1760 link_ref(link);
9524014e 1761 link->setting_genmode = true;
0e2fdb83
SS		 1762
1763 return 0;
1764}
1765
302a796f 1766static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1767 int r;
1768
1746cf2a
TG		 1769 assert(link);
1770
5da8149f 1771 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1772 return 1;
1773
1c4baffc 1774 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1775 if (r < 0)
26d6b214 1776 /* we warn but don't fail the link, as it may be brought up later */
5ecb131d 1777 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
45ad2c13 1778
f882c247
TG		 1779 return 1;
1780}
1781
1cc84f3b 1782static int link_up(Link *link) {
4afd3348 1783 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1784 int r;
1785
f882c247 1786 assert(link);
c106cc36 1787 assert(link->network);
f882c247
TG		 1788 assert(link->manager);
1789 assert(link->manager->rtnl);
1790
6a7a4e4d 1791 log_link_debug(link, "Bringing link up");
449f7554 1792
6a7a4e4d
LP		 1793 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1794 if (r < 0)
1795 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1796
2b2d8603 1797 /* set it free if not enslaved with networkd */
6cb955c6 1798 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1799 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1800 if (r < 0)
1801 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1802 }
1803
5d4795f3 1804 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1805 if (r < 0)
1806 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1807
c106cc36 1808 if (link->network->mac) {
1c4baffc 1809 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1810 if (r < 0)
1811 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1812 }
1813
302a796f
YW		 1814 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1815 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1816 if (r < 0)
1817 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1818
b226d99b
TG		 1819 link_ref(link);
1820
f882c247
TG		 1821 return 0;
1822}
1823
302a796f 1824static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1825 int r;
1826
1827 assert(link);
1828
1829 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1830 return 1;
1831
1c4baffc 1832 r = sd_netlink_message_get_errno(m);
0d4ad91d 1833 if (r < 0)
5ecb131d 1834 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
0d4ad91d
AR		 1835
1836 return 1;
1837}
1838
8e54db83 1839int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1840 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1841 int r;
1842
1843 assert(link);
1844 assert(link->manager);
1845 assert(link->manager->rtnl);
1846
6a7a4e4d 1847 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1848
1849 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1850 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1851 if (r < 0)
1852 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1853
1854 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1855 if (r < 0)
1856 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1857
8e54db83
YW		 1858 r = netlink_call_async(link->manager->rtnl, NULL, req,
1859 callback ?: link_down_handler,
302a796f 1860 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1861 if (r < 0)
1862 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1863
1864 link_ref(link);
1865
1866 return 0;
1867}
1868
89fe6535
SS		 1869static int link_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1870 int r;
1871
1872 assert(link);
1873
1874 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1875 return 1;
1876
1877 r = sd_netlink_message_get_errno(m);
1878 if (r < 0)
1879 log_link_message_warning_errno(link, m, r, "Could not set group for the interface");
1880
1881 return 1;
1882}
1883
1884static int link_set_group(Link *link) {
1885 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1886 int r;
1887
1888 assert(link);
1889 assert(link->network);
1890 assert(link->manager);
1891 assert(link->manager->rtnl);
1892
1893 if (link->network->group <= 0)
1894 return 0;
1895
1896 log_link_debug(link, "Setting group");
1897
1898 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1899 if (r < 0)
1900 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1901
1902 r = sd_netlink_message_append_u32(req, IFLA_GROUP, link->network->group);
1903 if (r < 0)
1904 return log_link_error_errno(link, r, "Could not set link group: %m");
1905
1906 r = netlink_call_async(link->manager->rtnl, NULL, req, link_group_handler,
1907 link_netlink_destroy_callback, link);
1908 if (r < 0)
1909 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1910
1911 link_ref(link);
1912
1913 return 0;
1914}
1915
0d4ad91d
AR		 1916static int link_handle_bound_to_list(Link *link) {
1917 Link *l;
0d4ad91d
AR		 1918 int r;
1919 bool required_up = false;
1920 bool link_is_up = false;
1921
1922 assert(link);
1923
1924 if (hashmap_isempty(link->bound_to_links))
1925 return 0;
1926
1927 if (link->flags & IFF_UP)
1928 link_is_up = true;
1929
90e74a66 1930 HASHMAP_FOREACH (l, link->bound_to_links)
0d4ad91d
AR		 1931 if (link_has_carrier(l)) {
1932 required_up = true;
1933 break;
1934 }
1935
1936 if (!required_up && link_is_up) {
8e54db83 1937 r = link_down(link, NULL);
0d4ad91d
AR		 1938 if (r < 0)
1939 return r;
1940 } else if (required_up && !link_is_up) {
1941 r = link_up(link);
1942 if (r < 0)
1943 return r;
1944 }
1945
1946 return 0;
1947}
1948
1949static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 1950 Link *l;
1951 int r;
1952
1953 assert(link);
1954
1955 if (hashmap_isempty(link->bound_by_links))
1956 return 0;
1957
90e74a66 1958 HASHMAP_FOREACH (l, link->bound_by_links) {
0d4ad91d
AR		 1959 r = link_handle_bound_to_list(l);
1960 if (r < 0)
1961 return r;
1962 }
1963
1964 return 0;
1965}
1966
1967static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1968 int r;
1969
1970 assert(link);
1971 assert(carrier);
1972
1973 if (link == carrier)
1974 return 0;
1975
1976 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1977 return 0;
1978
1979 r = hashmap_ensure_allocated(h, NULL);
1980 if (r < 0)
1981 return r;
1982
1983 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1984 if (r < 0)
1985 return r;
1986
1987 return 0;
1988}
1989
1990static int link_new_bound_by_list(Link *link) {
1991 Manager *m;
1992 Link *carrier;
0d4ad91d
AR		 1993 int r;
1994 bool list_updated = false;
1995
1996 assert(link);
1997 assert(link->manager);
1998
1999 m = link->manager;
2000
90e74a66 2001 HASHMAP_FOREACH(carrier, m->links) {
0d4ad91d
AR		 2002 if (!carrier->network)
2003 continue;
2004
2005 if (strv_isempty(carrier->network->bind_carrier))
2006 continue;
2007
191a3f16 2008 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 2009 r = link_put_carrier(link, carrier, &link->bound_by_links);
2010 if (r < 0)
2011 return r;
2012
2013 list_updated = true;
2014 }
2015 }
2016
2017 if (list_updated)
84de38c5 2018 link_dirty(link);
0d4ad91d 2019
90e74a66 2020 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 2021 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2022 if (r < 0)
2023 return r;
2024
84de38c5 2025 link_dirty(carrier);
0d4ad91d
AR		 2026 }
2027
2028 return 0;
2029}
2030
2031static int link_new_bound_to_list(Link *link) {
2032 Manager *m;
2033 Link *carrier;
0d4ad91d
AR		 2034 int r;
2035 bool list_updated = false;
2036
2037 assert(link);
2038 assert(link->manager);
2039
2040 if (!link->network)
2041 return 0;
2042
2043 if (strv_isempty(link->network->bind_carrier))
2044 return 0;
2045
2046 m = link->manager;
2047
90e74a66 2048 HASHMAP_FOREACH (carrier, m->links) {
191a3f16 2049 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 2050 r = link_put_carrier(link, carrier, &link->bound_to_links);
2051 if (r < 0)
2052 return r;
2053
2054 list_updated = true;
2055 }
2056 }
2057
2058 if (list_updated)
84de38c5 2059 link_dirty(link);
0d4ad91d 2060
90e74a66 2061 HASHMAP_FOREACH (carrier, link->bound_to_links) {
0d4ad91d
AR		 2062 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2063 if (r < 0)
2064 return r;
2065
84de38c5 2066 link_dirty(carrier);
0d4ad91d
AR		 2067 }
2068
2069 return 0;
2070}
2071
2072static int link_new_carrier_maps(Link *link) {
2073 int r;
2074
2075 r = link_new_bound_by_list(link);
2076 if (r < 0)
2077 return r;
2078
2079 r = link_handle_bound_by_list(link);
2080 if (r < 0)
2081 return r;
2082
2083 r = link_new_bound_to_list(link);
2084 if (r < 0)
2085 return r;
2086
2087 r = link_handle_bound_to_list(link);
2088 if (r < 0)
2089 return r;
2090
2091 return 0;
2092}
2093
2094static void link_free_bound_to_list(Link *link) {
2095 Link *bound_to;
0d4ad91d 2096
90e74a66 2097 HASHMAP_FOREACH (bound_to, link->bound_to_links) {
0d4ad91d
AR		 2098 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2099
2100 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2101 link_dirty(bound_to);
0d4ad91d
AR		 2102 }
2103
2104 return;
2105}
2106
2107static void link_free_bound_by_list(Link *link) {
2108 Link *bound_by;
0d4ad91d 2109
90e74a66 2110 HASHMAP_FOREACH (bound_by, link->bound_by_links) {
0d4ad91d
AR		 2111 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2112
2113 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2114 link_dirty(bound_by);
0d4ad91d
AR		 2115 link_handle_bound_to_list(bound_by);
2116 }
2117 }
2118
2119 return;
2120}
2121
2122static void link_free_carrier_maps(Link *link) {
2123 bool list_updated = false;
2124
2125 assert(link);
2126
2127 if (!hashmap_isempty(link->bound_to_links)) {
2128 link_free_bound_to_list(link);
2129 list_updated = true;
2130 }
2131
2132 if (!hashmap_isempty(link->bound_by_links)) {
2133 link_free_bound_by_list(link);
2134 list_updated = true;
2135 }
2136
2137 if (list_updated)
84de38c5 2138 link_dirty(link);
0d4ad91d
AR		 2139
2140 return;
2141}
2142
5f707e12
YW		 2143static int link_append_to_master(Link *link, NetDev *netdev) {
2144 Link *master;
2145 int r;
2146
2147 assert(link);
2148 assert(netdev);
2149
2150 r = link_get(link->manager, netdev->ifindex, &master);
2151 if (r < 0)
2152 return r;
2153
de7fef4b 2154 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 2155 if (r <= 0)
5f707e12
YW		 2156 return r;
2157
2158 link_ref(link);
2159 return 0;
2160}
2161
2162static void link_drop_from_master(Link *link, NetDev *netdev) {
2163 Link *master;
2164
2165 assert(link);
2166
2167 if (!link->manager || !netdev)
2168 return;
2169
2170 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2171 return;
2172
2173 link_unref(set_remove(master->slaves, link));
2174}
2175
2176static void link_detach_from_manager(Link *link) {
2177 if (!link || !link->manager)
2178 return;
2179
2180 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2181 link_clean(link);
2182
2183 /* The following must be called at last. */
2184 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2185 link_unref(link);
2186}
2187
0d4ad91d
AR		 2188void link_drop(Link *link) {
2189 if (!link || link->state == LINK_STATE_LINGER)
2190 return;
2191
2192 link_set_state(link, LINK_STATE_LINGER);
2193
2194 link_free_carrier_maps(link);
2195
5f707e12
YW		 2196 if (link->network) {
2197 link_drop_from_master(link, link->network->bridge);
2198 link_drop_from_master(link, link->network->bond);
2199 }
2200
6a7a4e4d 2201 log_link_debug(link, "Link removed");
0d4ad91d 2202
db2f8a2e 2203 (void) unlink(link->state_file);
c4397d94 2204 link_detach_from_manager(link);
0d4ad91d
AR		 2205}
2206
3f265037 2207static int link_joined(Link *link) {
f882c247
TG		 2208 int r;
2209
ef1ba606 2210 assert(link);
f5be5601 2211 assert(link->network);
dd3efc09 2212
0d4ad91d
AR		 2213 if (!hashmap_isempty(link->bound_to_links)) {
2214 r = link_handle_bound_to_list(link);
2215 if (r < 0)
2216 return r;
2217 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2218 r = link_up(link);
2219 if (r < 0) {
2220 link_enter_failed(link);
2221 return r;
2222 }
ef1ba606 2223 }
f882c247 2224
9ed794a3 2225 if (link->network->bridge) {
e1853b00 2226 r = link_set_bridge(link);
6a7a4e4d
LP		 2227 if (r < 0)
2228 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 2229
2230 r = link_append_to_master(link, link->network->bridge);
2231 if (r < 0)
2232 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 2233 }
2234
eb64b435 2235 if (link->network->bond) {
7fcee284 2236 r = link_set_bond(link);
eb64b435
SS		 2237 if (r < 0)
2238 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2239
45e11abf 2240 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2241 if (r < 0)
2242 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2243 }
2244
ffff9abe
TJ		 2245 if (link->network->use_br_vlan &&
2246 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2247 r = link_set_bridge_vlan(link);
2248 if (r < 0)
2249 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2250 }
2251
c1835a42
RM		 2252 /* Skip setting up addresses until it gets carrier,
2253 or it would try to set addresses twice,
2254 which is bad for non-idempotent steps. */
dad2d78e 2255 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2256 return 0;
2257
b425c3ae 2258 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 2259 return link_request_set_addresses(link);
02b59d57
TG		 2260}
2261
302a796f 2262static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2263 int r;
2264
1746cf2a 2265 assert(link);
ef1ba606 2266 assert(link->network);
34bf3c00 2267 assert(link->enslaving > 0);
02b59d57 2268
313cefa1 2269 link->enslaving--;
52433f6b 2270
5da8149f 2271 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2272 return 1;
2273
1c4baffc 2274 r = sd_netlink_message_get_errno(m);
856f962c 2275 if (r < 0 && r != -EEXIST) {
5ecb131d 2276 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG		 2277 link_enter_failed(link);
2278 return 1;
4ff296b0
YW		 2279 }
2280
2281 log_link_debug(link, "Joined netdev");
02b59d57 2282
34bf3c00 2283 if (link->enslaving == 0) {
4ff296b0
YW		 2284 r = link_joined(link);
2285 if (r < 0)
2286 link_enter_failed(link);
34bf3c00 2287 }
02b59d57
TG		 2288
2289 return 1;
2290}
2291
3f265037 2292static int link_enter_join_netdev(Link *link) {
6a0a2f86 2293 NetDev *netdev;
02b59d57
TG		 2294 int r;
2295
2296 assert(link);
2297 assert(link->network);
bd08ce56 2298 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2299
289e6774 2300 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2301
84de38c5 2302 link_dirty(link);
34bf3c00 2303 link->enslaving = 0;
02b59d57 2304
d9c67ea1 2305 if (link->network->bond) {
cbff7170
TJ		 2306 if (link->network->bond->state == NETDEV_STATE_READY &&
2307 link->network->bond->ifindex == link->master_ifindex)
2308 return link_joined(link);
2309
f2341e0a
LP		 2310 log_struct(LOG_DEBUG,
2311 LOG_LINK_INTERFACE(link),
2312 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2313 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2314
34bf3c00
YW		 2315 link->enslaving++;
2316
f2341e0a 2317 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2318 if (r < 0) {
f2341e0a
LP		 2319 log_struct_errno(LOG_WARNING, r,
2320 LOG_LINK_INTERFACE(link),
2321 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2322 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2323 link_enter_failed(link);
2324 return r;
2325 }
0ad6148e
MO		 2326 }
2327
d9c67ea1 2328 if (link->network->bridge) {
f2341e0a
LP		 2329 log_struct(LOG_DEBUG,
2330 LOG_LINK_INTERFACE(link),
2331 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2332 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2333
34bf3c00
YW		 2334 link->enslaving++;
2335
f2341e0a 2336 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2337 if (r < 0) {
f2341e0a
LP		 2338 log_struct_errno(LOG_WARNING, r,
2339 LOG_LINK_INTERFACE(link),
2340 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2341 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2342 link_enter_failed(link);
2343 return r;
2344 }
52433f6b
TG		 2345 }
2346
6cb955c6
AR		 2347 if (link->network->vrf) {
2348 log_struct(LOG_DEBUG,
2349 LOG_LINK_INTERFACE(link),
2350 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2351 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2352
34bf3c00
YW		 2353 link->enslaving++;
2354
6cb955c6
AR		 2355 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2356 if (r < 0) {
2357 log_struct_errno(LOG_WARNING, r,
2358 LOG_LINK_INTERFACE(link),
2359 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2360 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2361 link_enter_failed(link);
2362 return r;
2363 }
6cb955c6
AR		 2364 }
2365
90e74a66 2366 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7951dea2 2367
2b6db913
YW		 2368 if (netdev->ifindex > 0)
2369 /* Assume already enslaved. */
a63e5daa 2370 continue;
a63e5daa 2371
7033af49
YW		 2372 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2373 continue;
2374
f2341e0a
LP		 2375 log_struct(LOG_DEBUG,
2376 LOG_LINK_INTERFACE(link),
2377 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2378 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2379
34bf3c00
YW		 2380 link->enslaving++;
2381
f2341e0a 2382 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2383 if (r < 0) {
f2341e0a
LP		 2384 log_struct_errno(LOG_WARNING, r,
2385 LOG_LINK_INTERFACE(link),
2386 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2387 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2388 link_enter_failed(link);
2389 return r;
2390 }
326cb406
SS		 2391 }
2392
34bf3c00
YW		 2393 if (link->enslaving == 0)
2394 return link_joined(link);
2395
ef1ba606
TG		 2396 return 0;
2397}
2398
769d324c 2399static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2400 int r;
2401
765afd5c 2402 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2403 return 0;
2404
765afd5c
LP		 2405 /* We propagate the forwarding flag from one interface to the
2406 * global setting one way. This means: as long as at least one
2407 * interface was configured at any time that had IP forwarding
2408 * enabled the setting will stay on for good. We do this
2409 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2410 * somewhat in sync (see below). */
15dee3f0 2411
62e021a9 2412 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2413 if (r < 0)
765afd5c 2414 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2415
769d324c
LP		 2416 return 0;
2417}
2418
2419static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2420 int r;
2421
765afd5c 2422 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2423 return 0;
2424
61233823 2425 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2426 * packet forwarding setting: either packet forwarding is on
2427 * for all, or off for all. We hence don't bother with a
2428 * per-interface setting, but simply propagate the interface
2429 * flag, if it is set, to the global flag, one-way. Note that
2430 * while IPv4 would allow a per-interface flag, we expose the
2431 * same behaviour there and also propagate the setting from
2432 * one to all, to keep things simple (see above). */
15dee3f0 2433
62e021a9 2434 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2435 if (r < 0)
765afd5c 2436 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2437
2438 return 0;
2439}
2440
49092e22 2441static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2442 IPv6PrivacyExtensions s;
49092e22
SS		 2443 int r;
2444
1f0d9695 2445 s = link_ipv6_privacy_extensions(link);
66a6bd68 2446 if (s < 0)
49092e22
SS		 2447 return 0;
2448
62e021a9 2449 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2450 if (r < 0)
49092e22
SS		 2451 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2452
2453 return 0;
2454}
2455
4f2e437a 2456static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2457 int r;
2458
2459 /* Make this a NOP if IPv6 is not available */
2460 if (!socket_ipv6_is_supported())
2461 return 0;
2462
2463 if (link->flags & IFF_LOOPBACK)
2464 return 0;
2465
d68e2e59
LP		 2466 if (!link->network)
2467 return 0;
2468
62e021a9 2469 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2470 if (r < 0)
fe307276 2471 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2472
2473 return 0;
2474}
2475
8749cbcd 2476static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2477 int r;
2478
2479 /* Make this a NOP if IPv6 is not available */
2480 if (!socket_ipv6_is_supported())
2481 return 0;
2482
2483 if (link->flags & IFF_LOOPBACK)
2484 return 0;
2485
d68e2e59
LP		 2486 if (!link->network)
2487 return 0;
2488
8749cbcd
SS		 2489 if (link->network->ipv6_dad_transmits < 0)
2490 return 0;
2491
62e021a9 2492 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2493 if (r < 0)
8749cbcd 2494 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2495
2496 return 0;
2497}
2498
b69c3180 2499static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2500 int r;
2501
2502 /* Make this a NOP if IPv6 is not available */
2503 if (!socket_ipv6_is_supported())
2504 return 0;
2505
2506 if (link->flags & IFF_LOOPBACK)
2507 return 0;
2508
d68e2e59
LP		 2509 if (!link->network)
2510 return 0;
2511
b69c3180
SS		 2512 if (link->network->ipv6_hop_limit < 0)
2513 return 0;
2514
62e021a9 2515 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2516 if (r < 0)
b69c3180 2517 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2518
2519 return 0;
2520}
2521
11102cba 2522static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2523 int r;
2524
2525 /* Make this a NOP if IPv6 is not available */
2526 if (!socket_ipv6_is_supported())
2527 return 0;
2528
2529 if (link->flags & IFF_LOOPBACK)
2530 return 0;
2531
2532 if (link->network->ipv6_mtu == 0)
2533 return 0;
2534
d236718c
DS		 2535 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
2536 * on the interface. Bump up IPv6 MTU bytes to IPV6_MTU_MIN. */
2537 if (link->network->ipv6_mtu < IPV6_MIN_MTU) {
2538 log_link_notice(link, "Bumping IPv6 MTU to "STRINGIFY(IPV6_MIN_MTU)" byte minimum required");
2539 link->network->ipv6_mtu = IPV6_MIN_MTU;
2540 }
2541
62e021a9 2542 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
d236718c
DS		 2543 if (r < 0) {
2544 if (link->mtu < link->network->ipv6_mtu)
2545 log_link_warning(link, "Cannot set IPv6 MTU %"PRIu32" higher than device MTU %"PRIu32,
2546 link->network->ipv6_mtu, link->mtu);
2547 else
2548 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2549 }
2550
2551 link->ipv6_mtu_set = true;
11102cba
SS		 2552
2553 return 0;
2554}
2555
94d76d07
YW		 2556static int link_set_ipv4_accept_local(Link *link) {
2557 int r;
2558
2559 if (link->flags & IFF_LOOPBACK)
2560 return 0;
2561
2562 if (link->network->ipv4_accept_local < 0)
2563 return 0;
2564
2565 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "accept_local", link->network->ipv4_accept_local);
2566 if (r < 0)
2567 log_link_warning_errno(link, r, "Cannot set IPv4 accept_local flag for interface: %m");
2568
2569 return 0;
2570}
2571
30226d27
TJ		 2572static bool link_is_static_address_configured(Link *link, Address *address) {
2573 Address *net_address;
2574
2575 assert(link);
2576 assert(address);
2577
2578 if (!link->network)
2579 return false;
2580
2581 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2582 if (address_equal(net_address, address))
2583 return true;
6f5d73ab
YW		 2584 else if (address->family == AF_INET6 && net_address->family == AF_INET6 &&
2585 in_addr_equal(AF_INET6, &address->in_addr, &net_address->in_addr_peer) > 0)
2586 return true;
30226d27
TJ		 2587
2588 return false;
2589}
2590
7ecf0c3e
TJ		 2591static bool link_is_static_route_configured(Link *link, Route *route) {
2592 Route *net_route;
2593
2594 assert(link);
2595 assert(route);
2596
2597 if (!link->network)
2598 return false;
2599
2600 LIST_FOREACH(routes, net_route, link->network->static_routes)
2601 if (route_equal(net_route, route))
2602 return true;
2603
2604 return false;
2605}
2606
db51778f
YW		 2607static bool link_address_is_dynamic(Link *link, Address *address) {
2608 Route *route;
db51778f
YW		 2609
2610 assert(link);
2611 assert(address);
2612
2613 if (address->cinfo.ifa_prefered != CACHE_INFO_INFINITY_LIFE_TIME)
2614 return true;
2615
2616 /* Even when the address is leased from a DHCP server, networkd assign the address
2617 * without lifetime when KeepConfiguration=dhcp. So, let's check that we have
2618 * corresponding routes with RTPROT_DHCP. */
90e74a66 2619 SET_FOREACH(route, link->routes_foreign) {
db51778f
YW		 2620 if (route->protocol != RTPROT_DHCP)
2621 continue;
2622
2623 if (address->family != route->family)
2624 continue;
2625
2626 if (in_addr_equal(address->family, &address->in_addr, &route->prefsrc))
2627 return true;
2628 }
2629
2630 return false;
2631}
2632
0917a271
DS		 2633static int link_enumerate_ipv6_tentative_addresses(Link *link) {
2634 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
2635 sd_netlink_message *addr;
2636 int r;
2637
2638 assert(link);
2639 assert(link->manager);
2640 assert(link->manager->rtnl);
2641
2642 r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_GETADDR, 0, AF_INET6);
2643 if (r < 0)
2644 return r;
2645
2646 r = sd_netlink_call(link->manager->rtnl, req, 0, &reply);
2647 if (r < 0)
2648 return r;
2649
2650 for (addr = reply; addr; addr = sd_netlink_message_next(addr)) {
2651 unsigned char flags;
2652 int ifindex;
2653
2654 r = sd_rtnl_message_addr_get_ifindex(addr, &ifindex);
2655 if (r < 0) {
2656 log_link_warning_errno(link, r, "rtnl: invalid ifindex, ignoring: %m");
2657 continue;
2658 } else if (link->ifindex != ifindex)
2659 continue;
2660
2661 r = sd_rtnl_message_addr_get_flags(addr, &flags);
2662 if (r < 0) {
2663 log_link_warning_errno(link, r, "rtnl: received address message with invalid flags, ignoring: %m");
2664 continue;
2665 } else if (!(flags & IFA_F_TENTATIVE))
2666 continue;
2667
2668 log_link_debug(link, "Found tentative ipv6 link-local address");
2669 (void) manager_rtnl_process_address(link->manager->rtnl, addr, link->manager);
2670 }
2671
2672 return 0;
2673}
2674
5e5b137a
TG		 2675static int link_drop_foreign_config(Link *link) {
2676 Address *address;
2677 Route *route;
5e5b137a
TG		 2678 int r;
2679
0917a271
DS		 2680 /* The kernel doesn't notify us about tentative addresses;
2681 * so if ipv6ll is disabled, we need to enumerate them now so we can drop them below */
2682 if (!link_ipv6ll_enabled(link)) {
2683 r = link_enumerate_ipv6_tentative_addresses(link);
2684 if (r < 0)
2685 return r;
2686 }
2687
90e74a66 2688 SET_FOREACH(address, link->addresses_foreign) {
fe307276 2689 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2690 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
5e5b137a
TG		 2691 continue;
2692
db51778f 2693 if (link_address_is_dynamic(link, address)) {
b1b0b42e 2694 if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
db51778f 2695 continue;
b1b0b42e 2696 } else if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
db51778f
YW		 2697 continue;
2698
30226d27
TJ		 2699 if (link_is_static_address_configured(link, address)) {
2700 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2701 if (r < 0)
2702 return log_link_error_errno(link, r, "Failed to add address: %m");
2703 } else {
63ae0569 2704 r = address_remove(address, link, NULL);
30226d27
TJ		 2705 if (r < 0)
2706 return r;
2707 }
5e5b137a
TG		 2708 }
2709
59048336
YW		 2710 r = link_drop_foreign_neighbors(link);
2711 if (r < 0)
2712 return r;
d1bdafd2 2713
90e74a66 2714 SET_FOREACH(route, link->routes_foreign) {
fe307276 2715 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2716 if (route->protocol == RTPROT_KERNEL)
2717 continue;
2718
bd7d6cec
YW		 2719 /* do not touch multicast route added by kernel */
2720 /* FIXME: Why the kernel adds this route with protocol RTPROT_BOOT??? We need to investigate that.
2721 * https://tools.ietf.org/html/rfc4862#section-5.4 may explain why. */
2722 if (route->protocol == RTPROT_BOOT &&
2723 route->family == AF_INET6 &&
2724 route->dst_prefixlen == 8 &&
2725 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 }}} }))
2726 continue;
2727
b1b0b42e 2728 if (route->protocol == RTPROT_STATIC && link->network &&
db51778f
YW		 2729 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2730 continue;
2731
b1b0b42e 2732 if (route->protocol == RTPROT_DHCP && link->network &&
db51778f
YW		 2733 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2734 continue;
2735
7ecf0c3e 2736 if (link_is_static_route_configured(link, route)) {
f1368755 2737 r = route_add(link, route, NULL);
7ecf0c3e
TJ		 2738 if (r < 0)
2739 return r;
2740 } else {
4645ad47 2741 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2742 if (r < 0)
2743 return r;
2744 }
5e5b137a
TG		 2745 }
2746
2747 return 0;
2748}
2749
9b966cee
YW		 2750static int remove_static_address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2751 int r;
2752
2753 assert(m);
2754 assert(link);
2755 assert(link->ifname);
2756 assert(link->address_remove_messages > 0);
2757
2758 link->address_remove_messages--;
2759
2760 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2761 return 1;
2762
2763 r = sd_netlink_message_get_errno(m);
2764 if (r < 0 && r != -EADDRNOTAVAIL)
2765 log_link_message_warning_errno(link, m, r, "Could not drop address");
2766 else if (r >= 0)
2767 (void) manager_rtnl_process_address(rtnl, m, link->manager);
2768
2769 if (link->address_remove_messages == 0 && link->request_static_addresses) {
2770 link_set_state(link, LINK_STATE_CONFIGURING);
2771 r = link_request_set_addresses(link);
2772 if (r < 0)
2773 link_enter_failed(link);
2774 }
2775
2776 return 1;
2777}
2778
3104883d 2779static int link_drop_config(Link *link) {
410a7f15 2780 Address *address, *pool_address;
3104883d 2781 Route *route;
3104883d
SS		 2782 int r;
2783
90e74a66 2784 SET_FOREACH(address, link->addresses) {
3104883d 2785 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2786 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
3104883d
SS		 2787 continue;
2788
9b966cee 2789 r = address_remove(address, link, remove_static_address_handler);
3104883d
SS		 2790 if (r < 0)
2791 return r;
410a7f15 2792
9b966cee
YW		 2793 link->address_remove_messages++;
2794
410a7f15 2795 /* If this address came from an address pool, clean up the pool */
b6766fb1 2796 LIST_FOREACH(addresses, pool_address, link->pool_addresses)
410a7f15
RM		 2797 if (address_equal(address, pool_address)) {
2798 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2799 address_free(pool_address);
2800 break;
2801 }
3104883d
SS		 2802 }
2803
59048336
YW		 2804 r = link_drop_neighbors(link);
2805 if (r < 0)
2806 return r;
d1bdafd2 2807
90e74a66 2808 SET_FOREACH(route, link->routes) {
3104883d
SS		 2809 /* do not touch routes managed by the kernel */
2810 if (route->protocol == RTPROT_KERNEL)
2811 continue;
2812
4645ad47 2813 r = route_remove(route, link, NULL);
3104883d
SS		 2814 if (r < 0)
2815 return r;
2816 }
2817
c69305ff
LP		 2818 ndisc_flush(link);
2819
3104883d
SS		 2820 return 0;
2821}
2822
051e77ca
SS		 2823static int link_configure_ipv4_dad(Link *link) {
2824 Address *address;
2825 int r;
2826
2827 assert(link);
2828 assert(link->network);
2829
2830 LIST_FOREACH(addresses, address, link->network->static_addresses)
2831 if (address->family == AF_INET &&
2832 FLAGS_SET(address->duplicate_address_detection, ADDRESS_FAMILY_IPV4)) {
2833 r = configure_ipv4_duplicate_address_detection(link, address);
2834 if (r < 0)
2835 return log_link_error_errno(link, r, "Failed to configure IPv4ACD: %m");
2836 }
2837
2838 return 0;
2839}
2840
34658df2
YW		 2841static int link_configure_traffic_control(Link *link) {
2842 TrafficControl *tc;
02b59d57
TG		 2843 int r;
2844
34658df2
YW		 2845 link->tc_configured = false;
2846 link->tc_messages = 0;
4ecdcb07 2847
90e74a66 2848 ORDERED_HASHMAP_FOREACH(tc, link->network->tc_by_section) {
34658df2 2849 r = traffic_control_configure(link, tc);
4ecdcb07
YW		 2850 if (r < 0)
2851 return r;
2852 }
2853
34658df2
YW		 2854 if (link->tc_messages == 0)
2855 link->tc_configured = true;
4ecdcb07 2856 else
34658df2 2857 log_link_debug(link, "Configuring traffic control");
4ecdcb07
YW		 2858
2859 return 0;
2860}
2861
518cd6b5
SS		 2862static int link_configure_sr_iov(Link *link) {
2863 SRIOV *sr_iov;
518cd6b5
SS		 2864 int r;
2865
2866 link->sr_iov_configured = false;
2867 link->sr_iov_messages = 0;
2868
90e74a66 2869 ORDERED_HASHMAP_FOREACH(sr_iov, link->network->sr_iov_by_section) {
518cd6b5
SS		 2870 r = sr_iov_configure(link, sr_iov);
2871 if (r < 0)
2872 return r;
2873 }
2874
2875 if (link->sr_iov_messages == 0)
2876 link->sr_iov_configured = true;
2877 else
2878 log_link_debug(link, "Configuring SR-IOV");
2879
2880 return 0;
2881}
2882
4ecdcb07
YW		 2883static int link_configure(Link *link) {
2884 int r;
2885
ef1ba606 2886 assert(link);
b22d8a00 2887 assert(link->network);
bd08ce56 2888 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2889
34658df2 2890 r = link_configure_traffic_control(link);
4ecdcb07
YW		 2891 if (r < 0)
2892 return r;
2893
518cd6b5
SS		 2894 r = link_configure_sr_iov(link);
2895 if (r < 0)
2896 return r;
2897
500b96eb 2898 if (link->iftype == ARPHRD_CAN)
93ea7750 2899 return link_configure_can(link);
92c918b0 2900
482efedc
SS		 2901 /* If IPv6 configured that is static IPv6 address and IPv6LL autoconfiguration is enabled
2902 * for this interface, then enable IPv6 */
57ad7607 2903 (void) link_update_ipv6_sysctl(link);
482efedc 2904
23d8b221
SS		 2905 r = link_set_proxy_arp(link);
2906 if (r < 0)
2907 return r;
2908
a0e5c15d
FK		 2909 r = ipv6_proxy_ndp_addresses_configure(link);
2910 if (r < 0)
2911 return r;
2912
769d324c
LP		 2913 r = link_set_ipv4_forward(link);
2914 if (r < 0)
2915 return r;
2916
2917 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2918 if (r < 0)
2919 return r;
2920
49092e22
SS		 2921 r = link_set_ipv6_privacy_extensions(link);
2922 if (r < 0)
2923 return r;
2924
4f2e437a
SS		 2925 r = link_set_ipv6_accept_ra(link);
2926 if (r < 0)
2927 return r;
2928
8749cbcd
SS		 2929 r = link_set_ipv6_dad_transmits(link);
2930 if (r < 0)
2931 return r;
b69c3180
SS		 2932
2933 r = link_set_ipv6_hop_limit(link);
2934 if (r < 0)
2935 return r;
8749cbcd 2936
94d76d07
YW		 2937 r = link_set_ipv4_accept_local(link);
2938 if (r < 0)
2939 return r;
2940
99d2baa2
SS		 2941 r = link_set_flags(link);
2942 if (r < 0)
2943 return r;
2944
89fe6535
SS		 2945 r = link_set_group(link);
2946 if (r < 0)
2947 return r;
2948
910feb78 2949 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
b22d8a00 2950 r = ipv4ll_configure(link);
eb34d4af
TG		 2951 if (r < 0)
2952 return r;
2953 }
2954
78c958f8 2955 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2956 r = dhcp4_set_promote_secondaries(link);
2957 if (r < 0)
2958 return r;
2959
3c9b8860 2960 r = dhcp4_configure(link);
eb34d4af
TG		 2961 if (r < 0)
2962 return r;
eb34d4af
TG		 2963 }
2964
78c958f8 2965 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2966 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2967 if (r < 0)
2968 return r;
2969
2970 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2971 if (r < 0)
2972 return r;
dd43110f
TG		 2973 }
2974
62379e88
TG		 2975 if (link_dhcp6_enabled(link) ||
2976 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2977 r = dhcp6_configure(link);
2978 if (r < 0)
2979 return r;
2980 }
2981
2982 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2983 r = ndisc_configure(link);
4138fb2c
PF		 2984 if (r < 0)
2985 return r;
2986 }
2987
7465dd22
PF		 2988 if (link_radv_enabled(link)) {
2989 r = radv_configure(link);
2990 if (r < 0)
2991 return r;
2992 }
2993
8e1ad1ea 2994 if (link_lldp_rx_enabled(link)) {
7f853950 2995 r = link_lldp_rx_configure(link);
273eec24
LP		 2996 if (r < 0)
2997 return r;
ce43e484
SS		 2998 }
2999
f6fcc1c2 3000 r = link_configure_mtu(link);
40288ece
YW		 3001 if (r < 0)
3002 return r;
44b598a1 3003
9f6e82e6
YW		 3004 r = link_configure_addrgen_mode(link);
3005 if (r < 0)
3006 return r;
0e2fdb83 3007
051e77ca
SS		 3008 r = link_configure_ipv4_dad(link);
3009 if (r < 0)
3010 return r;
3011
3a390124
DS		 3012 return link_configure_continue(link);
3013}
3014
3015/* The configuration continues in this separate function, instead of
3016 * including this in the above link_configure() function, for two
3017 * reasons:
3018 * 1) some devices reset the link when the mtu is set, which caused
3019 * an infinite loop here in networkd; see:
3020 * https://github.com/systemd/systemd/issues/6593
3021 * https://github.com/systemd/systemd/issues/9831
3022 * 2) if ipv6ll is disabled, then bringing the interface up must be
3023 * delayed until after we get confirmation from the kernel that
3024 * the addr_gen_mode parameter has been set (via netlink), see:
3025 * https://github.com/systemd/systemd/issues/13882
3026 */
3027static int link_configure_continue(Link *link) {
55dc8c4a
YW		 3028 int r;
3029
3030 assert(link);
3031 assert(link->network);
bd08ce56 3032 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a 3033
9524014e 3034 if (link->setting_mtu || link->setting_genmode)
55dc8c4a
YW		 3035 return 0;
3036
4c649652
DS		 3037 /* Drop foreign config, but ignore loopback or critical devices.
3038 * We do not want to remove loopback address or addresses used for root NFS. */
3039 if (!(link->flags & IFF_LOOPBACK) &&
3040 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
3041 r = link_drop_foreign_config(link);
3042 if (r < 0)
3043 return r;
3044 }
3045
d236718c
DS		 3046 /* The kernel resets ipv6 mtu after changing device mtu;
3047 * we must set this here, after we've set device mtu */
3048 r = link_set_ipv6_mtu(link);
3049 if (r < 0)
3050 return r;
3051
dad2d78e 3052 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 3053 r = link_acquire_conf(link);
3054 if (r < 0)
3055 return r;
cc544d5f 3056 }
1e9be60b 3057
3f265037 3058 return link_enter_join_netdev(link);
505f8da7
TG		 3059}
3060
27dfc982
YW		 3061static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
3062 assert(duid);
3063
3064 if (duid->raw_data_len > 0)
3065 return 0;
3066
3067 if (duid->type != DUID_TYPE_UUID)
3068 return -EINVAL;
3069
3070 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
3071 duid->raw_data_len = sizeof(sd_id128_t);
3072
3073 return 1;
3074}
3075
3076int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
3077 Manager *manager = userdata;
3078 const sd_bus_error *e;
3079 const void *a;
3080 size_t sz;
3081 DUID *duid;
3082 Link *link;
3083 int r;
3084
3085 assert(m);
3086 assert(manager);
3087
3088 e = sd_bus_message_get_error(m);
3089 if (e) {
3090 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 3091 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 3092 e->message);
3093 goto configure;
3094 }
3095
3096 r = sd_bus_message_read_array(m, 'y', &a, &sz);
3097 if (r < 0)
3098 goto configure;
3099
3100 if (sz != sizeof(sd_id128_t)) {
ab4dd984 3101 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 3102 goto configure;
3103 }
3104
3105 memcpy(&manager->product_uuid, a, sz);
3106 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
3107 (void) duid_set_uuid(duid, manager->product_uuid);
3108
3109 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
3110
3111configure:
3112 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3dc2e7af
YW		 3113 link_unref(link);
3114
27dfc982
YW		 3115 r = link_configure(link);
3116 if (r < 0)
4ff296b0 3117 link_enter_failed(link);
27dfc982
YW		 3118 }
3119
3120 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
3121
3122 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
3123 * even if the method fails. */
3124 manager->has_product_uuid = true;
3125
3126 return 1;
3127}
3128
3129static bool link_requires_uuid(Link *link) {
3130 const DUID *duid;
3131
3132 assert(link);
3133 assert(link->manager);
3134 assert(link->network);
3135
3136 duid = link_get_duid(link);
3137 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
3138 return false;
3139
3140 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
3141 return true;
3142
3143 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
3144 return true;
3145
3146 return false;
3147}
3148
3149static int link_configure_duid(Link *link) {
3150 Manager *m;
3151 DUID *duid;
3152 int r;
3153
3154 assert(link);
3155 assert(link->manager);
3156 assert(link->network);
3157
3158 m = link->manager;
3159 duid = link_get_duid(link);
3160
3161 if (!link_requires_uuid(link))
3162 return 1;
3163
3164 if (m->has_product_uuid) {
3165 (void) duid_set_uuid(duid, m->product_uuid);
3166 return 1;
3167 }
3168
3169 if (!m->links_requesting_uuid) {
3170 r = manager_request_product_uuid(m, link);
3171 if (r < 0) {
3172 if (r == -ENOMEM)
3173 return r;
3174
ab4dd984
ZJS		 3175 log_link_warning_errno(link, r,
3176 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 3177 return 1;
3178 }
3179 } else {
3180 r = set_put(m->links_requesting_uuid, link);
3181 if (r < 0)
3182 return log_oom();
39dbd0c7
ZJS		 3183 if (r > 0)
3184 link_ref(link);
27dfc982
YW		 3185
3186 r = set_put(m->duids_requesting_uuid, duid);
3187 if (r < 0)
3188 return log_oom();
3189 }
3190
3191 return 0;
3192}
3193
572b21d9 3194static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
ad932b15
YW		 3195 Network *network;
3196 int r;
3197
572b21d9
YW		 3198 if (m) {
3199 _cleanup_strv_free_ char **s = NULL;
3200
3201 r = sd_netlink_message_get_errno(m);
3202 if (r < 0)
3203 return r;
3204
3205 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3206 if (r < 0 && r != -ENODATA)
3207 return r;
3208
3209 strv_free_and_replace(link->alternative_names, s);
3210 }
3211
c643bda5
YW		 3212 r = network_get(link->manager, link->iftype, link->sd_device,
3213 link->ifname, link->alternative_names, link->driver,
3214 &link->mac, &link->permanent_mac,
3215 link->wlan_iftype, link->ssid, &link->bssid, &network);
ad932b15
YW		 3216 if (r == -ENOENT) {
3217 link_enter_unmanaged(link);
3218 return 0;
3219 } else if (r == 0 && network->unmanaged) {
3220 link_enter_unmanaged(link);
3221 return 0;
3222 } else if (r < 0)
3223 return r;
3224
99b8517c 3225 if (link->network == network && !force)
ad932b15
YW		 3226 return 0;
3227
3228 log_link_info(link, "Re-configuring with %s", network->filename);
3229
3230 /* Dropping old .network file */
3231 r = link_stop_clients(link, false);
572b21d9 3232 if (r < 0)
ad932b15 3233 return r;
ad932b15
YW		 3234
3235 if (link_dhcp4_server_enabled(link))
3236 (void) sd_dhcp_server_stop(link->dhcp_server);
3237
3238 r = link_drop_config(link);
3239 if (r < 0)
3240 return r;
3241
2c7b826d 3242 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
ad932b15
YW		 3243 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
3244 r = link_drop_foreign_config(link);
3245 if (r < 0)
3246 return r;
3247 }
3248
3249 link_free_carrier_maps(link);
3250 link_free_engines(link);
3251 link->network = network_unref(link->network);
3252
3253 /* Then, apply new .network file */
3254 r = network_apply(network, link);
3255 if (r < 0)
3256 return r;
3257
3258 r = link_new_carrier_maps(link);
3259 if (r < 0)
3260 return r;
3261
3262 link_set_state(link, LINK_STATE_INITIALIZED);
8ae7b8a1 3263 link_dirty(link);
ad932b15
YW		 3264
3265 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3266 * link_configure() is called later asynchronously. */
3267 r = link_configure_duid(link);
3268 if (r <= 0)
3269 return r;
3270
3271 r = link_configure(link);
3272 if (r < 0)
3273 return r;
3274
3275 return 0;
3276}
3277
572b21d9
YW		 3278static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3279 int r;
3280
3281 r = link_reconfigure_internal(link, m, false);
3282 if (r < 0)
3283 link_enter_failed(link);
3284
3285 return 1;
3286}
3287
3288static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3289 int r;
3290
3291 r = link_reconfigure_internal(link, m, true);
3292 if (r < 0)
3293 link_enter_failed(link);
3294
3295 return 1;
3296}
3297
3298int link_reconfigure(Link *link, bool force) {
3299 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
3300 int r;
3301
2c0d7ed3
YW		 3302 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
3303 return 0;
3304
572b21d9
YW		 3305 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3306 link->ifindex);
3307 if (r < 0)
3308 return r;
3309
3310 r = netlink_call_async(link->manager->rtnl, NULL, req,
3311 force ? link_force_reconfigure_handler : link_reconfigure_handler,
3312 link_netlink_destroy_callback, link);
3313 if (r < 0)
3314 return r;
3315
3316 link_ref(link);
3317
3318 return 0;
3319}
3320
e6bf7774 3321static int link_initialized_and_synced(Link *link) {
505f8da7 3322 Network *network;
505f8da7
TG		 3323 int r;
3324
3325 assert(link);
3326 assert(link->ifname);
3327 assert(link->manager);
3328
bd08ce56
YW		 3329 /* We may get called either from the asynchronous netlink callback,
3330 * or directly for link_add() if running in a container. See link_add(). */
3331 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 3332 return 0;
505f8da7 3333
6a7a4e4d 3334 log_link_debug(link, "Link state is up-to-date");
bd08ce56 3335 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 3336
0d4ad91d
AR		 3337 r = link_new_bound_by_list(link);
3338 if (r < 0)
3339 return r;
3340
3341 r = link_handle_bound_by_list(link);
3342 if (r < 0)
3343 return r;
3344
c4a03a56 3345 if (!link->network) {
0894cfe4 3346 r = wifi_get_info(link);
8d968fdd
YW		 3347 if (r < 0)
3348 return r;
3349
c643bda5
YW		 3350 r = network_get(link->manager, link->iftype, link->sd_device,
3351 link->ifname, link->alternative_names, link->driver,
3352 &link->mac, &link->permanent_mac,
3353 link->wlan_iftype, link->ssid, &link->bssid, &network);
c4a03a56
TG		 3354 if (r == -ENOENT) {
3355 link_enter_unmanaged(link);
4232cf04 3356 return 0;
a09dc546
DM		 3357 } else if (r == 0 && network->unmanaged) {
3358 link_enter_unmanaged(link);
3359 return 0;
c4a03a56
TG		 3360 } else if (r < 0)
3361 return r;
505f8da7 3362
c4a03a56
TG		 3363 if (link->flags & IFF_LOOPBACK) {
3364 if (network->link_local != ADDRESS_FAMILY_NO)
3365 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3366
c4a03a56
TG		 3367 if (network->dhcp != ADDRESS_FAMILY_NO)
3368 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3369
c4a03a56
TG		 3370 if (network->dhcp_server)
3371 log_link_debug(link, "Ignoring DHCP server for loopback link");
3372 }
bd2efe92 3373
7d342c03 3374 r = network_apply(network, link);
c4a03a56
TG		 3375 if (r < 0)
3376 return r;
3377 }
505f8da7 3378
0d4ad91d
AR		 3379 r = link_new_bound_to_list(link);
3380 if (r < 0)
3381 return r;
3382
27dfc982
YW		 3383 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3384 * link_configure() is called later asynchronously. */
3385 r = link_configure_duid(link);
3386 if (r <= 0)
3387 return r;
3388
a748b692
TG		 3389 r = link_configure(link);
3390 if (r < 0)
3391 return r;
3392
4232cf04 3393 return 0;
505f8da7
TG		 3394}
3395
302a796f 3396static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
572b21d9 3397 _cleanup_strv_free_ char **s = NULL;
4ff296b0
YW		 3398 int r;
3399
572b21d9
YW		 3400 r = sd_netlink_message_get_errno(m);
3401 if (r < 0) {
40681e5c 3402 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 3403 link_enter_failed(link);
3404 return 0;
3405 }
3406
3407 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3408 if (r < 0 && r != -ENODATA) {
3409 link_enter_failed(link);
3410 return 0;
3411 }
3412
3413 strv_free_and_replace(link->alternative_names, s);
3414
4ff296b0
YW		 3415 r = link_initialized_and_synced(link);
3416 if (r < 0)
3417 link_enter_failed(link);
e6bf7774
YW		 3418 return 1;
3419}
3420
51517f9e 3421int link_initialized(Link *link, sd_device *device) {
4afd3348 3422 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3423 int r;
3424
3425 assert(link);
3426 assert(link->manager);
3427 assert(link->manager->rtnl);
3428 assert(device);
3429
8434fd5c 3430 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3431 return 0;
3432
51517f9e 3433 if (link->sd_device)
679b3605
TG		 3434 return 0;
3435
79008bdd 3436 log_link_debug(link, "udev initialized link");
bd08ce56 3437 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 3438
51517f9e 3439 link->sd_device = sd_device_ref(device);
4f561e8e 3440
3c9b8860
TG		 3441 /* udev has initialized the link, but we don't know if we have yet
3442 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3443 * when it returns we know that the pending NEWLINKs have already been
3444 * processed and that we are up-to-date */
4f561e8e 3445
3c9b8860
TG		 3446 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3447 link->ifindex);
4f561e8e
TG		 3448 if (r < 0)
3449 return r;
3450
302a796f
YW		 3451 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3452 link_netlink_destroy_callback, link);
4f561e8e
TG		 3453 if (r < 0)
3454 return r;
3455
5da8149f
TG		 3456 link_ref(link);
3457
4f561e8e
TG		 3458 return 0;
3459}
3460
c4a03a56 3461static int link_load(Link *link) {
0bc70f1d
TG		 3462 _cleanup_free_ char *network_file = NULL,
3463 *addresses = NULL,
f703cc2c 3464 *routes = NULL,
0bc70f1d
TG		 3465 *dhcp4_address = NULL,
3466 *ipv4ll_address = NULL;
3467 union in_addr_union address;
c4a03a56
TG		 3468 int r;
3469
3470 assert(link);
3471
aa8fbc74 3472 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3473 "NETWORK_FILE", &network_file,
3474 "ADDRESSES", &addresses,
f703cc2c 3475 "ROUTES", &routes,
0bc70f1d 3476 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3477 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3478 if (r < 0 && r != -ENOENT)
3479 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3480
3481 if (network_file) {
3482 Network *network;
3483 char *suffix;
3484
3485 /* drop suffix */
3486 suffix = strrchr(network_file, '.');
3487 if (!suffix) {
3488 log_link_debug(link, "Failed to get network name from %s", network_file);
3489 goto network_file_fail;
3490 }
3491 *suffix = '\0';
3492
3493 r = network_get_by_name(link->manager, basename(network_file), &network);
3494 if (r < 0) {
3495 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3496 goto network_file_fail;
3497 }
3498
7d342c03 3499 r = network_apply(network, link);
c4a03a56
TG		 3500 if (r < 0)
3501 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3502 }
3503
3504network_file_fail:
3505
1f68f772
ZJS		 3506 for (const char *p = addresses; p; ) {
3507 _cleanup_free_ char *address_str = NULL;
3508 char *prefixlen_str;
3509 int family;
3510 unsigned char prefixlen;
c4a03a56 3511
1f68f772
ZJS		 3512 r = extract_first_word(&p, &address_str, NULL, 0);
3513 if (r < 0)
3514 log_link_warning_errno(link, r, "failed to parse ADDRESSES: %m");
3515 if (r <= 0)
3516 break;
c4a03a56 3517
1f68f772
ZJS		 3518 prefixlen_str = strchr(address_str, '/');
3519 if (!prefixlen_str) {
3520 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
3521 continue;
3522 }
3523 *prefixlen_str++ = '\0';
c4a03a56 3524
1f68f772
ZJS		 3525 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3526 if (r != 1) {
3527 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3528 continue;
3529 }
c4a03a56 3530
1f68f772
ZJS		 3531 r = in_addr_from_string_auto(address_str, &family, &address);
3532 if (r < 0) {
3533 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
3534 continue;
c4a03a56 3535 }
c4a03a56 3536
1f68f772
ZJS		 3537 r = address_add(link, family, &address, prefixlen, NULL);
3538 if (r < 0)
3539 return log_link_error_errno(link, r, "Failed to add address: %m");
3540 }
74544b4e 3541
1f68f772
ZJS		 3542 for (const char *p = routes; p; ) {
3543 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
3544 _cleanup_(route_freep) Route *tmp = NULL;
3545 _cleanup_free_ char *route_str = NULL;
3546 char *prefixlen_str;
3547 Route *route;
f703cc2c 3548
1f68f772
ZJS		 3549 r = extract_first_word(&p, &route_str, NULL, 0);
3550 if (r < 0)
3551 log_link_debug_errno(link, r, "failed to parse ROUTES: %m");
3552 if (r <= 0)
3553 break;
c598ac76 3554
1f68f772
ZJS		 3555 prefixlen_str = strchr(route_str, '/');
3556 if (!prefixlen_str) {
3557 log_link_debug(link, "Failed to parse route %s", route_str);
3558 continue;
3559 }
3560 *prefixlen_str++ = '\0';
f703cc2c 3561
1f68f772
ZJS		 3562 r = route_new(&tmp);
3563 if (r < 0)
3564 return log_oom();
f703cc2c 3565
1f68f772
ZJS		 3566 r = sscanf(prefixlen_str,
3567 "%hhu/%hhu/%"SCNu32"/%"PRIu32"/"USEC_FMT,
3568 &tmp->dst_prefixlen,
3569 &tmp->tos,
3570 &tmp->priority,
3571 &tmp->table,
3572 &tmp->lifetime);
3573 if (r != 5) {
3574 log_link_debug(link,
3575 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3576 prefixlen_str);
3577 continue;
3578 }
f1368755 3579
1f68f772
ZJS		 3580 r = in_addr_from_string_auto(route_str, &tmp->family, &tmp->dst);
3581 if (r < 0) {
3582 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
3583 continue;
3584 }
f703cc2c 3585
1f68f772
ZJS		 3586 r = route_add(link, tmp, &route);
3587 if (r < 0)
3588 return log_link_error_errno(link, r, "Failed to add route: %m");
f703cc2c 3589
1f68f772
ZJS		 3590 if (route->lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
3591 r = sd_event_add_time(link->manager->event, &expire,
3592 clock_boottime_or_monotonic(),
3593 route->lifetime, 0, route_expire_handler, route);
f703cc2c 3594 if (r < 0)
1f68f772 3595 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
f703cc2c 3596 }
1f68f772
ZJS		 3597
3598 sd_event_source_unref(route->expire);
3599 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3600 }
3601
0bc70f1d
TG		 3602 if (dhcp4_address) {
3603 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3604 if (r < 0) {
b68d26b8 3605 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3606 goto dhcp4_address_fail;
3607 }
3608
b1c626f6 3609 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3610 if (r < 0)
b68d26b8 3611 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d 3612
1b43e246
DS		 3613 r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0);
3614 if (r < 0)
3615 return log_link_error_errno(link, r, "Failed to attach DHCPv4 event: %m");
3616
0bc70f1d
TG		 3617 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3618 if (r < 0)
b68d26b8 3619 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3620 }
3621
3622dhcp4_address_fail:
3623
3624 if (ipv4ll_address) {
3625 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3626 if (r < 0) {
b68d26b8 3627 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3628 goto ipv4ll_address_fail;
3629 }
3630
3631 r = sd_ipv4ll_new(&link->ipv4ll);
3632 if (r < 0)
b68d26b8 3633 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d 3634
1b43e246
DS		 3635 r = sd_ipv4ll_attach_event(link->ipv4ll, NULL, 0);
3636 if (r < 0)
3637 return log_link_error_errno(link, r, "Failed to attach IPv4LL event: %m");
3638
0bc70f1d
TG		 3639 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3640 if (r < 0)
b68d26b8 3641 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3642 }
3643
3644ipv4ll_address_fail:
3645
c4a03a56
TG		 3646 return 0;
3647}
3648
1c4baffc 3649int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3650 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3651 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3652 Link *link;
5a937ea2 3653 int r;
505f8da7
TG		 3654
3655 assert(m);
fbbeb65a 3656 assert(m->rtnl);
505f8da7
TG		 3657 assert(message);
3658 assert(ret);
3659
3660 r = link_new(m, message, ret);
3661 if (r < 0)
3662 return r;
3663
3664 link = *ret;
3665
6a7a4e4d 3666 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3667
c4a03a56
TG		 3668 r = link_load(link);
3669 if (r < 0)
3670 return r;
3671
bf331d87
YW		 3672 if (path_is_read_only_fs("/sys") <= 0) {
3673 /* udev should be around */
ae06ab10 3674 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3675 r = sd_device_new_from_device_id(&device, ifindex_str);
3676 if (r < 0) {
4d59e14f
YW		 3677 log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m");
3678 return 0;
5c416fc4 3679 }
505f8da7 3680
5a937ea2 3681 r = sd_device_get_is_initialized(device);
51517f9e 3682 if (r < 0) {
bf331d87 3683 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 3684 goto failed;
3685 }
5a937ea2 3686 if (r == 0) {
505f8da7 3687 /* not yet ready */
79008bdd 3688 log_link_debug(link, "link pending udev initialization...");
505f8da7 3689 return 0;
3c4cb064 3690 }
505f8da7 3691
299ad32d
YW		 3692 r = device_is_renaming(device);
3693 if (r < 0) {
bf331d87 3694 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 3695 goto failed;
3696 }
3697 if (r > 0) {
bf331d87 3698 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 3699 return 0;
3700 }
3701
4f561e8e
TG		 3702 r = link_initialized(link, device);
3703 if (r < 0)
5c416fc4 3704 goto failed;
4f561e8e 3705 } else {
e6bf7774 3706 r = link_initialized_and_synced(link);
4f561e8e 3707 if (r < 0)
5c416fc4 3708 goto failed;
4f561e8e 3709 }
505f8da7 3710
a748b692 3711 return 0;
5c416fc4
TG		 3712failed:
3713 link_enter_failed(link);
3714 return r;
a748b692
TG		 3715}
3716
c601ebf7 3717int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3718 int r;
3719
3720 assert(link);
3721
3722 log_link_info(link, "Gained IPv6LL");
3723
c601ebf7 3724 link->ipv6ll_address = *address;
e7ab854c
TG		 3725 link_check_ready(link);
3726
b9ea3d2e 3727 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3728 r = link_acquire_ipv6_conf(link);
3729 if (r < 0) {
3730 link_enter_failed(link);
3731 return r;
3732 }
3733 }
3734
3735 return 0;
3736}
3737
9c0a72f9
TG		 3738static int link_carrier_gained(Link *link) {
3739 int r;
3740
3741 assert(link);
3742
0894cfe4 3743 r = wifi_get_info(link);
8d968fdd
YW		 3744 if (r < 0)
3745 return r;
3746 if (r > 0) {
572b21d9
YW		 3747 r = link_reconfigure_internal(link, NULL, false);
3748 if (r < 0) {
3749 link_enter_failed(link);
8d968fdd 3750 return r;
572b21d9 3751 }
8d968fdd
YW		 3752 }
3753
b9ea3d2e 3754 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3755 r = link_acquire_conf(link);
3756 if (r < 0) {
3757 link_enter_failed(link);
3758 return r;
3759 }
6fc25497 3760
b425c3ae 3761 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 3762 r = link_request_set_addresses(link);
6fc25497
SS		 3763 if (r < 0)
3764 return r;
9c0a72f9
TG		 3765 }
3766
0d4ad91d
AR		 3767 r = link_handle_bound_by_list(link);
3768 if (r < 0)
3769 return r;
3770
1f241589
YW		 3771 if (!link->bridge_mdb_configured) {
3772 r = link_set_bridge_mdb(link);
3773 if (r < 0)
3774 return r;
3775 }
3776
3777 if (streq_ptr(link->kind, "bridge")) {
3778 Link *slave;
3779
3780 SET_FOREACH(slave, link->slaves) {
3781 if (slave->bridge_mdb_configured)
3782 continue;
3783
3784 r = link_set_bridge_mdb(slave);
3785 if (r < 0)
3786 link_enter_failed(slave);
3787 }
3788 }
3db468ea 3789
9c0a72f9
TG		 3790 return 0;
3791}
3792
3793static int link_carrier_lost(Link *link) {
3794 int r;
3795
3796 assert(link);
3797
25e992ba 3798 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3799 return 0;
3800
fbdb6605 3801 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3802 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3803 * configuration and stop the clients as well. */
97e7fb39
SS		 3804 if (link->setting_mtu)
3805 return 0;
3806
95355a28 3807 r = link_stop_clients(link, false);
9c0a72f9
TG		 3808 if (r < 0) {
3809 link_enter_failed(link);
3810 return r;
3811 }
3812
28464ae0
SS		 3813 if (link_dhcp4_server_enabled(link))
3814 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3815
3104883d
SS		 3816 r = link_drop_config(link);
3817 if (r < 0)
3818 return r;
3819
2c7b826d 3820 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
f258e948 3821 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3822 r = link_drop_foreign_config(link);
3823 if (r < 0)
3824 return r;
3825 }
3104883d 3826
0d4ad91d
AR		 3827 r = link_handle_bound_by_list(link);
3828 if (r < 0)
3829 return r;
3830
9c0a72f9
TG		 3831 return 0;
3832}
3833
3834int link_carrier_reset(Link *link) {
3835 int r;
3836
3837 assert(link);
3838
3839 if (link_has_carrier(link)) {
3840 r = link_carrier_lost(link);
3841 if (r < 0)
3842 return r;
3843
3844 r = link_carrier_gained(link);
3845 if (r < 0)
3846 return r;
3847
6a7a4e4d 3848 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3849 }
3850
3851 return 0;
3852}
3853
d236718c
DS		 3854/* This is called every time an interface admin state changes to up;
3855 * specifically, when IFF_UP flag changes from unset to set */
3856static int link_admin_state_up(Link *link) {
3857 int r;
3858
3859 /* We set the ipv6 mtu after the device mtu, but the kernel resets
3860 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
3861 * ipv6_mtu_set prevents this from trying to set it too early before
3862 * the link->network has been setup; we only need to reset it
3863 * here if we've already set it during normal initialization. */
3864 if (link->ipv6_mtu_set) {
3865 r = link_set_ipv6_mtu(link);
3866 if (r < 0)
3867 return r;
3868 }
3869
3870 return 0;
3871}
3872
1c4baffc 3873int link_update(Link *link, sd_netlink_message *m) {
572b21d9 3874 _cleanup_strv_free_ char **s = NULL;
c49b33ac 3875 struct ether_addr mac;
ca4e095a 3876 const char *ifname;
afe7fd56 3877 uint32_t mtu;
d236718c 3878 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 3879 int old_master, r;
22936833 3880
dd3efc09 3881 assert(link);
b8941f74 3882 assert(link->ifname);
22936833
TG		 3883 assert(m);
3884
7619683b 3885 if (link->state == LINK_STATE_LINGER) {
5238e957 3886 log_link_info(link, "Link re-added");
289e6774 3887 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3888
3889 r = link_new_carrier_maps(link);
3890 if (r < 0)
3891 return r;
7619683b
TG		 3892 }
3893
1c4baffc 3894 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3895 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3896 Manager *manager = link->manager;
b8941f74 3897
30de2b89 3898 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3899
30de2b89
YW		 3900 link_drop(link);
3901 r = link_add(manager, m, &link);
3902 if (r < 0)
3903 return r;
b8941f74
TG		 3904 }
3905
572b21d9
YW		 3906 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3907 if (r >= 0)
3908 strv_free_and_replace(link->alternative_names, s);
3909
1c4baffc 3910 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3911 if (r >= 0 && mtu > 0) {
3912 link->mtu = mtu;
4e964aa0 3913 if (link->original_mtu == 0) {
afe7fd56 3914 link->original_mtu = mtu;
6a7a4e4d 3915 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3916 }
3917
3918 if (link->dhcp_client) {
3c9b8860
TG		 3919 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3920 link->mtu);
fc95c359
YW		 3921 if (r < 0)
3922 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3923 }
7465dd22
PF		 3924
3925 if (link->radv) {
3926 r = sd_radv_set_mtu(link->radv, link->mtu);
3927 if (r < 0)
3928 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3929 }
9842de0d 3930 }
69629de9 3931
e9189a1f
TG		 3932 /* The kernel may broadcast NEWLINK messages without the MAC address
3933 set, simply ignore them. */
1c4baffc 3934 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
807667f7
YW		 3935 if (r >= 0 && memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN) != 0) {
3936
3937 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN);
3938
3939 log_link_debug(link, "Gained new MAC address: "
3940 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3941 mac.ether_addr_octet[0],
3942 mac.ether_addr_octet[1],
3943 mac.ether_addr_octet[2],
3944 mac.ether_addr_octet[3],
3945 mac.ether_addr_octet[4],
3946 mac.ether_addr_octet[5]);
3947
3948 if (link->ipv4ll) {
3949 bool restart = sd_ipv4ll_is_running(link->ipv4ll) > 0;
3950
3951 if (restart) {
3952 r = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 3953 if (r < 0)
807667f7 3954 return log_link_warning_errno(link, r, "Could not stop IPv4LL client: %m");
c49b33ac 3955 }
c49b33ac 3956
807667f7
YW		 3957 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
3958 if (r < 0)
3959 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
3960
3961 if (restart) {
3962 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d 3963 if (r < 0)
807667f7
YW		 3964 return log_link_warning_errno(link, r, "Could not restart IPv4LL client: %m");
3965 }
3966 }
3967
3968 if (link->dhcp_client) {
3969 r = sd_dhcp_client_set_mac(link->dhcp_client,
3970 (const uint8_t *) &link->mac,
3971 sizeof (link->mac),
3972 ARPHRD_ETHER);
3973 if (r < 0)
3974 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
3975
3976 r = dhcp4_set_client_identifier(link);
3977 if (r < 0)
3978 return log_link_warning_errno(link, r, "Could not set DHCP client identifier: %m");
3979 }
413708d1 3980
807667f7
YW		 3981 if (link->dhcp6_client) {
3982 const DUID* duid = link_get_duid(link);
3983 bool restart = sd_dhcp6_client_is_running(link->dhcp6_client) > 0;
3984
3985 if (restart) {
3986 r = sd_dhcp6_client_stop(link->dhcp6_client);
fff1f40c 3987 if (r < 0)
807667f7 3988 return log_link_warning_errno(link, r, "Could not stop DHCPv6 client: %m");
c49b33ac 3989 }
4138fb2c 3990
807667f7
YW		 3991 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
3992 (const uint8_t *) &link->mac,
3993 sizeof (link->mac),
3994 ARPHRD_ETHER);
3995 if (r < 0)
3996 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
8341a5c3 3997
807667f7
YW		 3998 if (link->network->iaid_set) {
3999 r = sd_dhcp6_client_set_iaid(link->dhcp6_client, link->network->iaid);
6a7a4e4d 4000 if (r < 0)
807667f7
YW		 4001 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
4002 }
4003
4004 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
4005 duid->type,
4006 duid->raw_data_len > 0 ? duid->raw_data : NULL,
4007 duid->raw_data_len);
4008 if (r < 0)
4009 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4010
4011 if (restart) {
4012 r = sd_dhcp6_client_start(link->dhcp6_client);
413708d1 4013 if (r < 0)
807667f7 4014 return log_link_warning_errno(link, r, "Could not restart DHCPv6 client: %m");
4138fb2c 4015 }
807667f7 4016 }
7465dd22 4017
807667f7
YW		 4018 if (link->radv) {
4019 bool restart = sd_radv_is_running(link->radv);
4020
4021 if (restart) {
4022 r = sd_radv_stop(link->radv);
7465dd22 4023 if (r < 0)
807667f7 4024 return log_link_warning_errno(link, r, "Could not stop Router Advertisement: %m");
7465dd22 4025 }
420d2058 4026
807667f7
YW		 4027 r = sd_radv_set_mac(link->radv, &link->mac);
4028 if (r < 0)
4029 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
4030
4031 if (restart) {
4032 r = sd_radv_start(link->radv);
420d2058 4033 if (r < 0)
807667f7 4034 return log_link_warning_errno(link, r, "Could not restart Router Advertisement: %m");
420d2058 4035 }
c49b33ac 4036 }
807667f7
YW		 4037
4038 if (link->ndisc) {
4039 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
4040 if (r < 0)
4041 return log_link_warning_errno(link, r, "Could not update MAC for NDisc: %m");
4042 }
4f882b2a
TG		 4043 }
4044
bb262ef0
YW		 4045 old_master = link->master_ifindex;
4046 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
4047
d236718c 4048 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 4049 had_carrier = link_has_carrier(link);
4050
bb262ef0 4051 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 4052 if (r < 0)
4053 return r;
4054
d236718c
DS		 4055 if (!link_was_admin_up && (link->flags & IFF_UP)) {
4056 log_link_info(link, "Link UP");
4057
4058 r = link_admin_state_up(link);
4059 if (r < 0)
4060 return r;
4061 } else if (link_was_admin_up && !(link->flags & IFF_UP))
4062 log_link_info(link, "Link DOWN");
4063
273eec24
LP		 4064 r = link_update_lldp(link);
4065 if (r < 0)
4066 return r;
4067
a61bb41c
TG		 4068 carrier_gained = !had_carrier && link_has_carrier(link);
4069 carrier_lost = had_carrier && !link_has_carrier(link);
4070
4071 if (carrier_gained) {
6a7a4e4d 4072 log_link_info(link, "Gained carrier");
a61bb41c 4073
9c0a72f9
TG		 4074 r = link_carrier_gained(link);
4075 if (r < 0)
4076 return r;
a61bb41c 4077 } else if (carrier_lost) {
6a7a4e4d 4078 log_link_info(link, "Lost carrier");
a61bb41c 4079
9c0a72f9
TG		 4080 r = link_carrier_lost(link);
4081 if (r < 0)
a61bb41c 4082 return r;
a61bb41c
TG		 4083 }
4084
4085 return 0;
dd3efc09 4086}
fe8db0c5 4087
b295beea
LP		 4088static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
4089 bool space = false;
b295beea
LP		 4090 Link *link;
4091
4092 assert(f);
4093 assert(prefix);
4094
4095 if (hashmap_isempty(h))
4096 return;
4097
0d536673 4098 fputs(prefix, f);
90e74a66 4099 HASHMAP_FOREACH(link, h) {
b295beea 4100 if (space)
0d536673 4101 fputc(' ', f);
b295beea
LP		 4102
4103 fprintf(f, "%i", link->ifindex);
4104 space = true;
4105 }
4106
0d536673 4107 fputc('\n', f);
b295beea
LP		 4108}
4109
64581765 4110static void link_save_dns(Link *link, FILE *f, struct in_addr_full **dns, unsigned n_dns, bool *space) {
dddc8d1e 4111 for (unsigned j = 0; j < n_dns; j++) {
e77bd3fd 4112 const char *str;
15761549 4113
64581765
YW		 4114 if (dns[j]->ifindex != 0 && dns[j]->ifindex != link->ifindex)
4115 continue;
4116
e77bd3fd
YW		 4117 str = in_addr_full_to_string(dns[j]);
4118 if (!str)
15761549 4119 continue;
15761549
YW		 4120
4121 if (*space)
4122 fputc(' ', f);
e77bd3fd 4123 fputs(str, f);
15761549
YW		 4124 *space = true;
4125 }
4126}
4127
d5e172d2
ZJS		 4128static void serialize_addresses(
4129 FILE *f,
4130 const char *lvalue,
4131 bool *space,
4132 char **addresses,
4133 sd_dhcp_lease *lease,
4134 bool conditional,
ddb82ec2 4135 sd_dhcp_lease_server_type what,
d5e172d2
ZJS		 4136 sd_dhcp6_lease *lease6,
4137 bool conditional6,
4138 int (*lease6_get_addr)(sd_dhcp6_lease*, const struct in6_addr**),
4139 int (*lease6_get_fqdn)(sd_dhcp6_lease*, char ***)) {
4140 int r;
4141
4142 bool _space = false;
4143 if (!space)
4144 space = &_space;
4145
4146 if (lvalue)
4147 fprintf(f, "%s=", lvalue);
4148 fputstrv(f, addresses, NULL, space);
4149
4150 if (lease && conditional) {
4151 const struct in_addr *lease_addresses;
4152
4153 r = sd_dhcp_lease_get_servers(lease, what, &lease_addresses);
4154 if (r > 0)
d8bff5cc 4155 serialize_in_addrs(f, lease_addresses, r, space, in4_addr_is_non_local);
d5e172d2
ZJS		 4156 }
4157
4158 if (lease6 && conditional6 && lease6_get_addr) {
4159 const struct in6_addr *in6_addrs;
4160
4161 r = lease6_get_addr(lease6, &in6_addrs);
d8bff5cc
ZJS		 4162 if (r > 0)
4163 serialize_in6_addrs(f, in6_addrs, r, space);
d5e172d2
ZJS		 4164 }
4165
4166 if (lease6 && conditional6 && lease6_get_fqdn) {
4167 char **in6_hosts;
4168
4169 r = lease6_get_fqdn(lease6, &in6_hosts);
4170 if (r > 0)
4171 fputstrv(f, in6_hosts, NULL, space);
4172 }
4173
4174 if (lvalue)
4175 fputc('\n', f);
4176}
4177
fe8db0c5 4178int link_save(Link *link) {
d361b373 4179 const char *admin_state, *oper_state, *carrier_state, *address_state;
68a8723c 4180 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 4181 _cleanup_fclose_ FILE *f = NULL;
c1eb9872 4182 Route *route;
18d8a2cf 4183 Address *a;
fe8db0c5
TG		 4184 int r;
4185
4186 assert(link);
4187 assert(link->state_file);
68a8723c 4188 assert(link->lease_file);
bbf7c048
TG		 4189 assert(link->manager);
4190
370e9930 4191 if (link->state == LINK_STATE_LINGER) {
6990fb6b 4192 (void) unlink(link->state_file);
370e9930
TG		 4193 return 0;
4194 }
4195
34437b4f
LP		 4196 link_lldp_save(link);
4197
deb2e523
TG		 4198 admin_state = link_state_to_string(link->state);
4199 assert(admin_state);
4200
e375dcde
TG		 4201 oper_state = link_operstate_to_string(link->operstate);
4202 assert(oper_state);
deb2e523 4203
ac999bf0
YW		 4204 carrier_state = link_carrier_state_to_string(link->carrier_state);
4205 assert(carrier_state);
4206
4207 address_state = link_address_state_to_string(link->address_state);
4208 assert(address_state);
4209
fe8db0c5
TG		 4210 r = fopen_temporary(link->state_file, &f, &temp_path);
4211 if (r < 0)
6a7a4e4d 4212 goto fail;
fe8db0c5 4213
5512a963 4214 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 4215
4216 fprintf(f,
4217 "# This is private data. Do not parse.\n"
deb2e523 4218 "ADMIN_STATE=%s\n"
ac999bf0
YW		 4219 "OPER_STATE=%s\n"
4220 "CARRIER_STATE=%s\n"
4221 "ADDRESS_STATE=%s\n",
4222 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 4223
bcb7a07e 4224 if (link->network) {
fe0e16db
YW		 4225 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
4226 const char *dhcp_domainname = NULL, *p;
fe0e16db 4227 bool space;
07bdc70d 4228
c1a38904
MTL		 4229 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
4230 yes_no(link->network->required_for_online));
4231
d5e172d2
ZJS		 4232 LinkOperationalStateRange st = link->network->required_operstate_for_online;
4233 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s%s%s\n",
4234 strempty(link_operstate_to_string(st.min)),
4235 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? ":" : "",
4236 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? strempty(link_operstate_to_string(st.max)) : "");
4ac77d63 4237
adc5b2e2
TG		 4238 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
4239
d5e172d2
ZJS		 4240 /************************************************************/
4241
0d536673 4242 fputs("DNS=", f);
ea352b40 4243 space = false;
15761549 4244 if (link->n_dns != (unsigned) -1)
64581765 4245 link_save_dns(link, f, link->dns, link->n_dns, &space);
15761549 4246 else
64581765 4247 link_save_dns(link, f, link->network->dns, link->network->n_dns, &space);
d5314fff 4248
d5e172d2
ZJS		 4249 serialize_addresses(f, NULL, &space,
4250 NULL,
4251 link->dhcp_lease,
4252 link->network->dhcp_use_dns,
ddb82ec2 4253 SD_DHCP_LEASE_DNS,
1633c457 4254 link->dhcp6_lease,
d5e172d2
ZJS		 4255 link->network->dhcp6_use_dns,
4256 sd_dhcp6_lease_get_dns,
4257 NULL);
1e7a0e21 4258
a8c10331 4259 /* Make sure to flush out old entries before we use the NDisc data */
1e7a0e21
LP		 4260 ndisc_vacuum(link);
4261
b296797f 4262 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 4263 NDiscRDNSS *dd;
4264
90e74a66 4265 SET_FOREACH(dd, link->ndisc_rdnss)
d8bff5cc 4266 serialize_in6_addrs(f, &dd->address, 1, &space);
299d578f
SS		 4267 }
4268
4269 fputc('\n', f);
4270
d5e172d2
ZJS		 4271 /************************************************************/
4272
4273 serialize_addresses(f, "NTP", NULL,
4274 link->ntp ?: link->network->ntp,
4275 link->dhcp_lease,
4276 link->network->dhcp_use_ntp,
ddb82ec2 4277 SD_DHCP_LEASE_NTP,
1633c457 4278 link->dhcp6_lease,
d5e172d2
ZJS		 4279 link->network->dhcp6_use_ntp,
4280 sd_dhcp6_lease_get_ntp_addrs,
4281 sd_dhcp6_lease_get_ntp_fqdn);
4282
4283 serialize_addresses(f, "SIP", NULL,
2a71d57f 4284 NULL,
d5e172d2
ZJS		 4285 link->dhcp_lease,
4286 link->network->dhcp_use_sip,
ddb82ec2 4287 SD_DHCP_LEASE_SIP,
2a71d57f 4288 NULL, false, NULL, NULL);
d5e172d2
ZJS		 4289
4290 /************************************************************/
bd8f6538 4291
b2a81c0b 4292 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 4293 if (link->dhcp_lease) {
b2a81c0b 4294 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 4295 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
4296 }
1633c457
YW		 4297 if (link->dhcp6_lease)
4298 (void) sd_dhcp6_lease_get_domains(link->dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 4299 }
4300
fe0e16db
YW		 4301 fputs("DOMAINS=", f);
4302 space = false;
90e74a66 4303 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains)
fe0e16db 4304 fputs_with_space(f, p, NULL, &space);
07bdc70d 4305
1e7a0e21 4306 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP		 4307 if (dhcp_domainname)
4308 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4309 if (dhcp_domains)
4310 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4311 if (dhcp6_domains)
4312 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 4313 }
4314
4315 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
4316 NDiscDNSSL *dd;
1e7a0e21 4317
90e74a66 4318 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 4319 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4320 }
b2a81c0b 4321
0d536673 4322 fputc('\n', f);
6192b846 4323
d5e172d2
ZJS		 4324 /************************************************************/
4325
fe0e16db
YW		 4326 fputs("ROUTE_DOMAINS=", f);
4327 space = false;
90e74a66 4328 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains)
fe0e16db 4329 fputs_with_space(f, p, NULL, &space);
b2a81c0b 4330
1e7a0e21 4331 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
1e7a0e21
LP		 4332 if (dhcp_domainname)
4333 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4334 if (dhcp_domains)
4335 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4336 if (dhcp6_domains)
4337 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 4338 }
4339
4340 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
4341 NDiscDNSSL *dd;
1e7a0e21 4342
90e74a66 4343 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 4344 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4345 }
b2a81c0b 4346
0d536673 4347 fputc('\n', f);
67272d15 4348
d5e172d2
ZJS		 4349 /************************************************************/
4350
3c9b8860 4351 fprintf(f, "LLMNR=%s\n",
15761549 4352 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
d5e172d2
ZJS		 4353
4354 /************************************************************/
4355
aaa297d4 4356 fprintf(f, "MDNS=%s\n",
15761549 4357 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
15761549 4358
d5e172d2
ZJS		 4359 /************************************************************/
4360
4361 int dns_default_route =
4362 link->dns_default_route >= 0 ? link->dns_default_route :
4363 link->network->dns_default_route;
4364 if (dns_default_route >= 0)
4365 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(dns_default_route));
4366
4367 /************************************************************/
4368
4369 DnsOverTlsMode dns_over_tls_mode =
4370 link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID ? link->dns_over_tls_mode :
4371 link->network->dns_over_tls_mode;
4372 if (dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
4373 fprintf(f, "DNS_OVER_TLS=%s\n", dns_over_tls_mode_to_string(dns_over_tls_mode));
4374
4375 /************************************************************/
4376
4377 DnssecMode dnssec_mode =
4378 link->dnssec_mode != _DNSSEC_MODE_INVALID ? link->dnssec_mode :
4379 link->network->dnssec_mode;
4380 if (dnssec_mode != _DNSSEC_MODE_INVALID)
4381 fprintf(f, "DNSSEC=%s\n", dnssec_mode_to_string(dnssec_mode));
4382
4383 /************************************************************/
4384
4385 Set *nta_anchors = link->dnssec_negative_trust_anchors;
4386 if (set_isempty(nta_anchors))
4387 nta_anchors = link->network->dnssec_negative_trust_anchors;
4388
4389 if (!set_isempty(nta_anchors)) {
8a516214
LP		 4390 const char *n;
4391
0d536673 4392 fputs("DNSSEC_NTA=", f);
8a516214 4393 space = false;
90e74a66 4394 SET_FOREACH(n, nta_anchors)
d390f8ef 4395 fputs_with_space(f, n, NULL, &space);
0d536673 4396 fputc('\n', f);
8a516214
LP		 4397 }
4398
d5e172d2
ZJS		 4399 /************************************************************/
4400
0d536673 4401 fputs("ADDRESSES=", f);
e7780c8d 4402 space = false;
90e74a66 4403 SET_FOREACH(a, link->addresses) {
e7780c8d
TG		 4404 _cleanup_free_ char *address_str = NULL;
4405
4406 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
4407 if (r < 0)
4408 goto fail;
4409
e7780c8d
TG		 4410 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
4411 space = true;
4412 }
0d536673 4413 fputc('\n', f);
c1eb9872 4414
d5e172d2
ZJS		 4415 /************************************************************/
4416
0d536673 4417 fputs("ROUTES=", f);
c1eb9872 4418 space = false;
90e74a66 4419 SET_FOREACH(route, link->routes) {
c1eb9872
TG		 4420 _cleanup_free_ char *route_str = NULL;
4421
4422 r = in_addr_to_string(route->family, &route->dst, &route_str);
4423 if (r < 0)
4424 goto fail;
4425
ecc3f340
ZJS		 4426 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
4427 space ? " " : "", route_str,
f833694d 4428 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 4429 space = true;
4430 }
4431
0d536673 4432 fputc('\n', f);
bcb7a07e 4433 }
7374f9d8 4434
b295beea
LP		 4435 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
4436 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 4437
8eb9058d 4438 if (link->dhcp_lease) {
bd91b83e 4439 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 4440 if (r < 0)
c2d6bd61 4441 goto fail;
fe8db0c5 4442
7374f9d8 4443 fprintf(f,
b0e39c82
TG		 4444 "DHCP_LEASE=%s\n",
4445 link->lease_file);
deb2e523 4446 } else
6990fb6b 4447 (void) unlink(link->lease_file);
fe8db0c5 4448
0bc70f1d
TG		 4449 if (link->ipv4ll) {
4450 struct in_addr address;
4451
4452 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
4453 if (r >= 0) {
0d536673 4454 fputs("IPV4LL_ADDRESS=", f);
072320ea 4455 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 4456 fputc('\n', f);
0bc70f1d
TG		 4457 }
4458 }
4459
7e738e7b
SS		 4460 if (link->dhcp6_client) {
4461 _cleanup_free_ char *duid = NULL;
4462 uint32_t iaid;
4463
4464 r = sd_dhcp6_client_get_iaid(link->dhcp6_client, &iaid);
4465 if (r >= 0)
4466 fprintf(f, "DHCP6_CLIENT_IAID=0x%x\n", iaid);
4467
4468 r = sd_dhcp6_client_duid_as_string(link->dhcp6_client, &duid);
4469 if (r >= 0)
4470 fprintf(f, "DHCP6_CLIENT_DUID=%s\n", duid);
4471 }
18d8a2cf 4472
c2d6bd61
LP		 4473 r = fflush_and_check(f);
4474 if (r < 0)
4475 goto fail;
fe8db0c5 4476
c2d6bd61 4477 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 4478 r = -errno;
c2d6bd61 4479 goto fail;
fe8db0c5
TG		 4480 }
4481
c2d6bd61 4482 return 0;
dacd6cee 4483
c2d6bd61 4484fail:
6a7a4e4d 4485 (void) unlink(link->state_file);
6a7a4e4d
LP		 4486 if (temp_path)
4487 (void) unlink(temp_path);
4488
dacd6cee 4489 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 4490}
4491
84de38c5
TG		 4492/* The serialized state in /run is no longer up-to-date. */
4493void link_dirty(Link *link) {
4494 int r;
4495
4496 assert(link);
4497
0c241a37
SS		 4498 /* mark manager dirty as link is dirty */
4499 manager_dirty(link->manager);
4500
de7fef4b 4501 r = set_ensure_put(&link->manager->dirty_links, NULL, link);
0c241a37 4502 if (r <= 0)
de7fef4b 4503 /* Ignore allocation errors and don't take another ref if the link was already dirty */
84de38c5 4504 return;
84de38c5
TG		 4505 link_ref(link);
4506}
4507
4508/* The serialized state in /run is up-to-date */
4509void link_clean(Link *link) {
4510 assert(link);
4511 assert(link->manager);
4512
1046bf9b 4513 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4514}
4515
c2a65950
YW		 4516int link_save_and_clean(Link *link) {
4517 int r;
4518
4519 r = link_save(link);
4520 if (r < 0)
4521 return r;
4522
4523 link_clean(link);
4524 return 0;
4525}
4526
fe8db0c5 4527static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4528 [LINK_STATE_PENDING] = "pending",
bd08ce56 4529 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 4530 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 4531 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4532 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4533 [LINK_STATE_FAILED] = "failed",
370e9930 4534 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4535};
4536
4537DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
5ecb131d
YW		 4538
4539int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg) {
4540 const char *err_msg = NULL;
4541
4542 (void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg);
d157714b
YW		 4543 return log_link_full_errno(link, level, err,
4544 "%s: %s%s%s%m",
4545 msg,
4546 strempty(err_msg),
4547 err_msg && !endswith(err_msg, ".") ? "." : "",
4548 err_msg ? " " : "");
5ecb131d 4549}
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