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network: simplify how initial space is handled
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
53e1b683 1/* SPDX-License-Identifier: LGPL-2.1+ */
f579559b 2
9aa5d8ba 3#include <netinet/in.h>
f579559b 4#include <linux/if.h>
8f815e8b 5#include <linux/if_arp.h>
4cc7a82c 6#include <unistd.h>
f579559b 7
b5efdb8a 8#include "alloc-util.h"
737f1405
YW		 9#include "bond.h"
10#include "bridge.h"
1346b1f0 11#include "bus-util.h"
27dfc982 12#include "dhcp-identifier.h"
bd91b83e 13#include "dhcp-lease-internal.h"
686d13b9 14#include "env-file.h"
4bb7cc82 15#include "ethtool-util.h"
3ffd4af2 16#include "fd-util.h"
cf1d700d 17#include "fileio.h"
737f1405 18#include "ipvlan.h"
ef118d00 19#include "missing_network.h"
cf1d700d 20#include "netlink-util.h"
c6f7c917 21#include "network-internal.h"
3ddcbeea 22#include "networkd-can.h"
8fcf1d61 23#include "networkd-dhcp-server.h"
ca5ad760
YW		 24#include "networkd-dhcp4.h"
25#include "networkd-dhcp6.h"
26#include "networkd-ipv4ll.h"
a0e5c15d 27#include "networkd-ipv6-proxy-ndp.h"
6a1af3d4
YW		 28#include "networkd-link-bus.h"
29#include "networkd-link.h"
8e1ad1ea 30#include "networkd-lldp-tx.h"
23f53b99 31#include "networkd-manager.h"
1e7a0e21 32#include "networkd-ndisc.h"
e4a71bf3 33#include "networkd-neighbor.h"
7465dd22 34#include "networkd-radv.h"
bce67bbe 35#include "networkd-routing-policy-rule.h"
8d968fdd 36#include "networkd-wifi.h"
cf1d700d
TG		 37#include "set.h"
38#include "socket-util.h"
bf331d87 39#include "stat-util.h"
15a5e950 40#include "stdio-util.h"
8b43440b 41#include "string-table.h"
51517f9e 42#include "strv.h"
62e021a9 43#include "sysctl-util.h"
34658df2 44#include "tc.h"
e4de7287 45#include "tmpfile-util.h"
299ad32d 46#include "udev-util.h"
cf1d700d 47#include "util.h"
737f1405 48#include "vrf.h"
fc2f9534 49
bdb9f580
YW		 50uint32_t link_get_vrf_table(Link *link) {
51 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
52}
53
54uint32_t link_get_dhcp_route_table(Link *link) {
55 /* When the interface is part of an VRF use the VRFs routing table, unless
56 * another table is explicitly specified. */
57 if (link->network->dhcp_route_table_set)
58 return link->network->dhcp_route_table;
59 return link_get_vrf_table(link);
60}
61
62uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
63 if (link->network->ipv6_accept_ra_route_table_set)
64 return link->network->ipv6_accept_ra_route_table;
65 return link_get_vrf_table(link);
66}
67
f24648a6
YW		 68DUID* link_get_duid(Link *link) {
69 if (link->network->duid.type != _DUID_TYPE_INVALID)
70 return &link->network->duid;
71 else
72 return &link->manager->duid;
73}
74
b9d74c40
LP		 75static bool link_dhcp6_enabled(Link *link) {
76 assert(link);
77
fa709992
LP		 78 if (!socket_ipv6_is_supported())
79 return false;
80
78c958f8
TG		 81 if (link->flags & IFF_LOOPBACK)
82 return false;
83
84 if (!link->network)
85 return false;
86
f2bfcdb9
YW		 87 if (link->network->bond)
88 return false;
89
500b96eb 90 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 91 return false;
92
e0ee46f2 93 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 94}
95
b9d74c40
LP		 96static bool link_dhcp4_enabled(Link *link) {
97 assert(link);
98
78c958f8
TG		 99 if (link->flags & IFF_LOOPBACK)
100 return false;
101
102 if (!link->network)
103 return false;
104
f2bfcdb9
YW		 105 if (link->network->bond)
106 return false;
107
500b96eb 108 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 109 return false;
110
e0ee46f2 111 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 112}
113
b9d74c40
LP		 114static bool link_dhcp4_server_enabled(Link *link) {
115 assert(link);
116
78c958f8
TG		 117 if (link->flags & IFF_LOOPBACK)
118 return false;
119
120 if (!link->network)
121 return false;
122
f2bfcdb9
YW		 123 if (link->network->bond)
124 return false;
125
500b96eb 126 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 127 return false;
128
78c958f8
TG		 129 return link->network->dhcp_server;
130}
131
2d792895 132bool link_ipv4ll_enabled(Link *link, AddressFamily mask) {
b9d74c40 133 assert(link);
910feb78 134 assert((mask & ~(ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) == 0);
b9d74c40 135
78c958f8
TG		 136 if (link->flags & IFF_LOOPBACK)
137 return false;
138
139 if (!link->network)
140 return false;
141
500b96eb 142 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 143 return false;
144
98d20a17 145 if (STRPTR_IN_SET(link->kind,
146 "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
c6ac3729 147 "vti6", "nlmon", "xfrm"))
a8f5bba6
JD		 148 return false;
149
f410d463
YW		 150 /* L3 or L3S mode do not support ARP. */
151 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
152 return false;
153
f2bfcdb9
YW		 154 if (link->network->bond)
155 return false;
156
910feb78 157 return link->network->link_local & mask;
8bc17bb3
SS		 158}
159
b9d74c40
LP		 160static bool link_ipv6ll_enabled(Link *link) {
161 assert(link);
162
fa709992
LP		 163 if (!socket_ipv6_is_supported())
164 return false;
165
d0d6a4cd
TG		 166 if (link->flags & IFF_LOOPBACK)
167 return false;
168
169 if (!link->network)
170 return false;
171
500b96eb 172 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 173 return false;
174
175 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon"))
a8f5bba6
JD		 176 return false;
177
f2bfcdb9
YW		 178 if (link->network->bond)
179 return false;
180
e0ee46f2 181 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 182}
183
439689c6
SS		 184static bool link_ipv6_enabled(Link *link) {
185 assert(link);
186
187 if (!socket_ipv6_is_supported())
188 return false;
189
b102cdca 190 if (link->network->bond)
2b00a4e0
TY		 191 return false;
192
500b96eb 193 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 194 return false;
195
4cef7fe3 196 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
adfeee49
YW		 197 if (link_ipv6ll_enabled(link))
198 return true;
199
200 if (network_has_static_ipv6_configurations(link->network))
201 return true;
202
203 return false;
439689c6
SS		 204}
205
7465dd22
PF		 206static bool link_radv_enabled(Link *link) {
207 assert(link);
208
209 if (!link_ipv6ll_enabled(link))
210 return false;
211
55a7c78b 212 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 213}
214
769d324c 215static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 216 assert(link);
217
5a8bcb67
LP		 218 if (link->flags & IFF_LOOPBACK)
219 return false;
220
221 if (!link->network)
222 return false;
223
2d792895 224 if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
765afd5c
LP		 225 return false;
226
e0ee46f2 227 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 228}
229
230static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 231 assert(link);
765afd5c
LP		 232
233 if (!socket_ipv6_is_supported())
234 return false;
235
769d324c
LP		 236 if (link->flags & IFF_LOOPBACK)
237 return false;
238
239 if (!link->network)
240 return false;
241
2d792895 242 if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
765afd5c
LP		 243 return false;
244
e0ee46f2 245 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 246}
247
23d8b221
SS		 248static bool link_proxy_arp_enabled(Link *link) {
249 assert(link);
250
251 if (link->flags & IFF_LOOPBACK)
252 return false;
253
254 if (!link->network)
255 return false;
256
257 if (link->network->proxy_arp < 0)
258 return false;
259
260 return true;
261}
262
b9d74c40
LP		 263static bool link_ipv6_accept_ra_enabled(Link *link) {
264 assert(link);
265
fa709992
LP		 266 if (!socket_ipv6_is_supported())
267 return false;
268
f5a8c43f
TG		 269 if (link->flags & IFF_LOOPBACK)
270 return false;
271
272 if (!link->network)
273 return false;
274
702c979f
SS		 275 if (!link_ipv6ll_enabled(link))
276 return false;
277
f5a8c43f
TG		 278 /* If unset use system default (enabled if local forwarding is disabled.
279 * disabled if local forwarding is enabled).
280 * If set, ignore or enforce RA independent of local forwarding state.
281 */
282 if (link->network->ipv6_accept_ra < 0)
283 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
284 return !link_ipv6_forward_enabled(link);
285 else if (link->network->ipv6_accept_ra > 0)
286 /* accept RA even if ip_forward is enabled */
287 return true;
288 else
289 /* ignore RA */
290 return false;
291}
292
1f0d9695 293static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 294 assert(link);
d68e2e59
LP		 295
296 if (!socket_ipv6_is_supported())
297 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
298
49092e22 299 if (link->flags & IFF_LOOPBACK)
1f0d9695 300 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 301
302 if (!link->network)
1f0d9695 303 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 304
305 return link->network->ipv6_privacy_extensions;
306}
307
57ad7607 308static int link_update_ipv6_sysctl(Link *link) {
482efedc 309 bool enabled;
439689c6
SS		 310 int r;
311
312 if (link->flags & IFF_LOOPBACK)
313 return 0;
314
482efedc
SS		 315 enabled = link_ipv6_enabled(link);
316 if (enabled) {
317 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", false);
318 if (r < 0)
57ad7607
ZJS		 319 return log_link_warning_errno(link, r, "Cannot enable IPv6: %m");
320
321 log_link_info(link, "IPv6 successfully enabled");
482efedc 322 }
439689c6
SS		 323
324 return 0;
325}
326
34bf3c00
YW		 327static bool link_is_enslaved(Link *link) {
328 if (link->flags & IFF_SLAVE)
329 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
330 return true;
331
34bf3c00
YW		 332 if (!link->network)
333 return false;
334
bb262ef0 335 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 336 return true;
337
bb262ef0
YW		 338 /* TODO: add conditions for other netdevs. */
339
34bf3c00
YW		 340 return false;
341}
342
45e11abf
YW		 343static void link_update_master_operstate(Link *link, NetDev *netdev) {
344 Link *master;
345
346 if (!netdev)
347 return;
348
349 if (link_get(link->manager, netdev->ifindex, &master) < 0)
350 return;
351
352 link_update_operstate(master, true);
353}
354
355void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 356 LinkOperationalState operstate;
1678fbb3
YW		 357 LinkCarrierState carrier_state;
358 LinkAddressState address_state;
35c5a9ca 359 _cleanup_strv_free_ char **p = NULL;
1678fbb3 360 uint8_t scope = RT_SCOPE_NOWHERE;
35c5a9ca 361 bool changed = false;
1678fbb3 362 Address *address;
45e11abf 363 Iterator i;
14153d1b 364
84de38c5
TG		 365 assert(link);
366
367 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 368 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 369 else if (link_has_carrier(link)) {
1678fbb3
YW		 370 if (link_is_enslaved(link))
371 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 372 else
1678fbb3 373 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 374 } else if (link->flags & IFF_UP)
1678fbb3 375 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 376 else
1678fbb3 377 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 378
1678fbb3 379 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 380 Link *slave;
381
5f707e12 382 SET_FOREACH(slave, link->slaves, i) {
959f65d3 383 link_update_operstate(slave, false);
84de38c5 384
1678fbb3
YW		 385 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
386 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 387 }
959f65d3 388 }
84de38c5 389
1678fbb3
YW		 390 SET_FOREACH(address, link->addresses, i) {
391 if (!address_is_ready(address))
392 continue;
84de38c5 393
1678fbb3
YW		 394 if (address->scope < scope)
395 scope = address->scope;
396 }
84de38c5 397
1678fbb3
YW		 398 /* for operstate we also take foreign addresses into account */
399 SET_FOREACH(address, link->addresses_foreign, i) {
400 if (!address_is_ready(address))
401 continue;
402
403 if (address->scope < scope)
404 scope = address->scope;
405 }
406
407 if (scope < RT_SCOPE_SITE)
408 /* universally accessible addresses found */
409 address_state = LINK_ADDRESS_STATE_ROUTABLE;
410 else if (scope < RT_SCOPE_HOST)
411 /* only link or site local addresses found */
412 address_state = LINK_ADDRESS_STATE_DEGRADED;
84de38c5 413 else
1678fbb3
YW		 414 /* no useful addresses found */
415 address_state = LINK_ADDRESS_STATE_OFF;
416
417 /* Mapping of address and carrier state vs operational state
418 * carrier state
419 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
420 * ------------------------------------------------------------------------------
421 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
422 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
423 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
424 */
84de38c5 425
1678fbb3
YW		 426 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
427 operstate = (LinkOperationalState) carrier_state;
428 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
429 operstate = LINK_OPERSTATE_ROUTABLE;
430 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
431 operstate = LINK_OPERSTATE_DEGRADED;
432 else
14153d1b
YW		 433 operstate = LINK_OPERSTATE_ENSLAVED;
434
35c5a9ca
YW		 435 if (link->carrier_state != carrier_state) {
436 link->carrier_state = carrier_state;
437 changed = true;
438 if (strv_extend(&p, "CarrierState") < 0)
439 log_oom();
440 }
959f65d3 441
35c5a9ca
YW		 442 if (link->address_state != address_state) {
443 link->address_state = address_state;
444 changed = true;
445 if (strv_extend(&p, "AddressState") < 0)
446 log_oom();
959f65d3
YW		 447 }
448
84de38c5
TG		 449 if (link->operstate != operstate) {
450 link->operstate = operstate;
35c5a9ca
YW		 451 changed = true;
452 if (strv_extend(&p, "OperationalState") < 0)
453 log_oom();
84de38c5 454 }
959f65d3 455
35c5a9ca
YW		 456 if (p)
457 link_send_changed_strv(link, p);
458 if (changed)
459 link_dirty(link);
460
45e11abf
YW		 461 if (also_update_master && link->network) {
462 link_update_master_operstate(link, link->network->bond);
463 link_update_master_operstate(link, link->network->bridge);
959f65d3 464 }
84de38c5
TG		 465}
466
51d18171
TG		 467#define FLAG_STRING(string, flag, old, new) \
468 (((old ^ new) & flag) \
469 ? ((old & flag) ? (" -" string) : (" +" string)) \
470 : "")
471
bb262ef0 472static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 473 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
474 uint8_t operstate;
475 int r;
476
477 assert(link);
478
479 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 480 if (r < 0)
481 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 482
1c4baffc 483 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 484 if (r < 0)
485 /* if we got a message without operstate, take it to mean
486 the state was unchanged */
487 operstate = link->kernel_operstate;
488
bb262ef0 489 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 490 return 0;
491
492 if (link->flags != flags) {
6a7a4e4d 493 log_link_debug(link, "Flags change:%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
51d18171
TG		 494 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
495 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
496 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
497 FLAG_STRING("UP", IFF_UP, link->flags, flags),
498 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
499 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
500 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
501 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
502 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
503 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
504 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
505 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
506 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
507 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
508 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
509 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
510 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
511 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
512 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
513
514 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
515 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
516 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
517 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
518 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
519 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
520 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
521 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
522
523 /* link flags are currently at most 18 bits, let's align to
524 * printing 20 */
525 if (unknown_flags_added)
79008bdd 526 log_link_debug(link,
6a7a4e4d 527 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 528 unknown_flags_added);
529
530 if (unknown_flags_removed)
79008bdd 531 log_link_debug(link,
6a7a4e4d 532 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 533 unknown_flags_removed);
534 }
535
536 link->flags = flags;
537 link->kernel_operstate = operstate;
538
959f65d3 539 link_update_operstate(link, true);
51d18171
TG		 540
541 return 0;
542}
543
1c4baffc 544static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 545 _cleanup_(link_unrefp) Link *link = NULL;
6cad256d 546 const char *ifname, *kind = NULL;
b710e6b6 547 unsigned short iftype;
572b21d9
YW		 548 int r, ifindex;
549 uint16_t type;
f579559b 550
0c2f9b84 551 assert(manager);
505f8da7 552 assert(message);
f579559b
TG		 553 assert(ret);
554
6cad256d
TJ		 555 /* check for link kind */
556 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
557 if (r == 0) {
db2f8a2e 558 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 559 r = sd_netlink_message_exit_container(message);
560 if (r < 0)
561 return r;
562 }
563
1c4baffc 564 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 565 if (r < 0)
566 return r;
567 else if (type != RTM_NEWLINK)
568 return -EINVAL;
569
570 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
571 if (r < 0)
572 return r;
573 else if (ifindex <= 0)
574 return -EINVAL;
575
b710e6b6
LP		 576 r = sd_rtnl_message_link_get_type(message, &iftype);
577 if (r < 0)
578 return r;
579
1c4baffc 580 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 581 if (r < 0)
582 return r;
583
17f9c355 584 link = new(Link, 1);
f579559b
TG		 585 if (!link)
586 return -ENOMEM;
587
17f9c355
YW		 588 *link = (Link) {
589 .n_ref = 1,
590 .manager = manager,
591 .state = LINK_STATE_PENDING,
17f9c355
YW		 592 .ifindex = ifindex,
593 .iftype = iftype,
15761549
YW		 594
595 .n_dns = (unsigned) -1,
596 .dns_default_route = -1,
597 .llmnr = _RESOLVE_SUPPORT_INVALID,
598 .mdns = _RESOLVE_SUPPORT_INVALID,
599 .dnssec_mode = _DNSSEC_MODE_INVALID,
600 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
17f9c355
YW		 601 };
602
505f8da7
TG		 603 link->ifname = strdup(ifname);
604 if (!link->ifname)
605 return -ENOMEM;
f579559b 606
6cad256d
TJ		 607 if (kind) {
608 link->kind = strdup(kind);
609 if (!link->kind)
610 return -ENOMEM;
611 }
612
cbff7170
TJ		 613 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
614 if (r < 0)
615 log_link_debug_errno(link, r, "New device has no master, continuing without");
616
1c4baffc 617 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 618 if (r < 0)
34437b4f 619 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 620
6666c4fa 621 r = ethtool_get_permanent_macaddr(NULL, link->ifname, &link->permanent_mac);
4bb7cc82
YW		 622 if (r < 0)
623 log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
624
572b21d9
YW		 625 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &link->alternative_names);
626 if (r < 0 && r != -ENODATA)
627 return r;
628
34437b4f 629 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 630 return -ENOMEM;
fe8db0c5 631
34437b4f 632 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 633 return -ENOMEM;
634
34437b4f 635 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 636 return -ENOMEM;
637
d5099efc 638 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 639 if (r < 0)
640 return r;
641
642 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 643 if (r < 0)
644 return r;
645
bb262ef0 646 r = link_update_flags(link, message, false);
51d18171
TG		 647 if (r < 0)
648 return r;
649
1cc6c93a 650 *ret = TAKE_PTR(link);
f579559b
TG		 651
652 return 0;
653}
654
15761549
YW		 655void link_ntp_settings_clear(Link *link) {
656 link->ntp = strv_free(link->ntp);
657}
658
659void link_dns_settings_clear(Link *link) {
660 link->dns = mfree(link->dns);
661 link->n_dns = (unsigned) -1;
662
663 link->search_domains = ordered_set_free_free(link->search_domains);
664 link->route_domains = ordered_set_free_free(link->route_domains);
665
666 link->dns_default_route = -1;
667 link->llmnr = _RESOLVE_SUPPORT_INVALID;
668 link->mdns = _RESOLVE_SUPPORT_INVALID;
669 link->dnssec_mode = _DNSSEC_MODE_INVALID;
670 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
671
672 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
673}
674
1a6bb31f
YW		 675static void link_free_engines(Link *link) {
676 if (!link)
677 return;
678
679 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
680 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
681 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
682 link->dhcp_routes = set_free(link->dhcp_routes);
683
684 link->lldp = sd_lldp_unref(link->lldp);
685
686 ndisc_flush(link);
687
688 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
689 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
690 link->ndisc = sd_ndisc_unref(link->ndisc);
691 link->radv = sd_radv_unref(link->radv);
692}
693
8301aa0b 694static Link *link_free(Link *link) {
428fd0a7
TG		 695 Address *address;
696
8301aa0b 697 assert(link);
f579559b 698
15761549
YW		 699 link_ntp_settings_clear(link);
700 link_dns_settings_clear(link);
701
f535e354
YW		 702 link->routes = set_free_with_destructor(link->routes, route_free);
703 link->routes_foreign = set_free_with_destructor(link->routes_foreign, route_free);
adda1ed9 704
c16c7808
SS		 705 link->nexthops = set_free_with_destructor(link->nexthops, nexthop_free);
706 link->nexthops_foreign = set_free_with_destructor(link->nexthops_foreign, nexthop_free);
707
d1bdafd2
WKI		 708 link->neighbors = set_free_with_destructor(link->neighbors, neighbor_free);
709 link->neighbors_foreign = set_free_with_destructor(link->neighbors_foreign, neighbor_free);
710
f535e354
YW		 711 link->addresses = set_free_with_destructor(link->addresses, address_free);
712 link->addresses_foreign = set_free_with_destructor(link->addresses_foreign, address_free);
adda1ed9 713
11bf3cce
LP		 714 while ((address = link->pool_addresses)) {
715 LIST_REMOVE(addresses, link->pool_addresses, address);
716 address_free(address);
717 }
718
7272b25e 719 link_lldp_emit_stop(link);
1a6bb31f 720 link_free_engines(link);
68a8723c 721 free(link->lease_file);
49699bac
SS		 722 free(link->lldp_file);
723
c166a070 724 free(link->ifname);
572b21d9 725 strv_free(link->alternative_names);
ceac4078 726 free(link->kind);
8d968fdd 727 free(link->ssid);
6cad256d 728
db2f8a2e 729 (void) unlink(link->state_file);
fe8db0c5 730 free(link->state_file);
c166a070 731
51517f9e 732 sd_device_unref(link->sd_device);
b5db00e5 733
0d4ad91d 734 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 735 hashmap_free(link->bound_by_links);
736
5f707e12 737 set_free_with_destructor(link->slaves, link_unref);
033295c1 738
c9c908a6
YW		 739 network_unref(link->network);
740
8301aa0b 741 return mfree(link);
14b746f7
TG		 742}
743
8301aa0b 744DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 745
11a7f229
TG		 746int link_get(Manager *m, int ifindex, Link **ret) {
747 Link *link;
11a7f229
TG		 748
749 assert(m);
11a7f229
TG		 750 assert(ifindex);
751 assert(ret);
752
ae06ab10 753 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 754 if (!link)
755 return -ENODEV;
756
757 *ret = link;
758
759 return 0;
760}
761
af9ba57a 762void link_set_state(Link *link, LinkState state) {
e331e246
TG		 763 assert(link);
764
765 if (link->state == state)
766 return;
767
0beb9542
YW		 768 log_link_debug(link, "State changed: %s -> %s",
769 link_state_to_string(link->state),
770 link_state_to_string(state));
771
e331e246
TG		 772 link->state = state;
773
774 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 775}
776
57bd6899
TG		 777static void link_enter_unmanaged(Link *link) {
778 assert(link);
779
e331e246 780 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 781
84de38c5 782 link_dirty(link);
57bd6899
TG		 783}
784
95355a28 785int link_stop_clients(Link *link, bool may_keep_dhcp) {
111bb8f9 786 int r = 0, k;
051e77ca 787 Address *ad;
111bb8f9
TG		 788
789 assert(link);
790 assert(link->manager);
791 assert(link->manager->event);
792
d03073dd
YW		 793 dhcp4_release_old_lease(link);
794
80060352
ZJS		 795 bool keep_dhcp = may_keep_dhcp &&
796 link->network &&
797 (link->manager->restarting ||
798 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
799
800 if (link->dhcp_client && !keep_dhcp) {
111bb8f9 801 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 802 if (k < 0)
36c7d709 803 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 804 }
805
ba179154 806 if (link->ipv4ll) {
111bb8f9 807 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 808 if (k < 0)
36c7d709 809 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 810 }
811
051e77ca
SS		 812 if (link->network)
813 LIST_FOREACH(addresses, ad, link->network->static_addresses)
814 if (ad->acd && sd_ipv4acd_is_running(ad->acd) == 0) {
815 k = sd_ipv4acd_stop(ad->acd);
816 if (k < 0)
817 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
818 }
819
f5a8c43f
TG		 820 if (link->dhcp6_client) {
821 k = sd_dhcp6_client_stop(link->dhcp6_client);
822 if (k < 0)
36c7d709 823 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 824 }
4138fb2c 825
1e7a0e21
LP		 826 if (link->ndisc) {
827 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 828 if (k < 0)
36c7d709 829 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 830 }
831
7465dd22
PF		 832 if (link->radv) {
833 k = sd_radv_stop(link->radv);
834 if (k < 0)
835 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
836 }
837
7272b25e 838 link_lldp_emit_stop(link);
111bb8f9
TG		 839 return r;
840}
841
b22d8a00 842void link_enter_failed(Link *link) {
ef1ba606 843 assert(link);
f882c247 844
370e9930 845 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 846 return;
847
6a7a4e4d 848 log_link_warning(link, "Failed");
449f7554 849
e331e246 850 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 851
95355a28 852 link_stop_clients(link, false);
111bb8f9 853
84de38c5 854 link_dirty(link);
f882c247
TG		 855}
856
7033af49
YW		 857static int link_join_netdevs_after_configured(Link *link) {
858 NetDev *netdev;
859 Iterator i;
860 int r;
861
862 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
863 if (netdev->ifindex > 0)
864 /* Assume already enslaved. */
865 continue;
866
867 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
868 continue;
869
870 log_struct(LOG_DEBUG,
871 LOG_LINK_INTERFACE(link),
872 LOG_NETDEV_INTERFACE(netdev),
873 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
874
875 r = netdev_join(netdev, link, NULL);
876 if (r < 0)
877 return log_struct_errno(LOG_WARNING, r,
878 LOG_LINK_INTERFACE(link),
879 LOG_NETDEV_INTERFACE(netdev),
880 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
881 }
882
883 return 0;
884}
885
e3a7b048 886static void link_enter_configured(Link *link) {
dd43110f
TG		 887 assert(link);
888 assert(link->network);
e3a7b048 889
289e6774 890 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 891 return;
dd43110f 892
e331e246 893 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 894
7033af49
YW		 895 (void) link_join_netdevs_after_configured(link);
896
84de38c5 897 link_dirty(link);
dd43110f
TG		 898}
899
47079967 900static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 901 RoutingPolicyRule *rule, *rrule = NULL;
902 int r;
903
904 assert(link);
905 assert(link->network);
906
2428613f
YW		 907 link->routing_policy_rules_configured = false;
908
8a9b3a23 909 LIST_FOREACH(rules, rule, link->network->rules) {
b80a511b 910 r = routing_policy_rule_get(link->manager, rule, &rrule);
ff14e2eb
YW		 911 if (r >= 0) {
912 if (r == 0)
913 (void) routing_policy_rule_make_local(link->manager, rrule);
8a9b3a23
SS		 914 continue;
915 }
916
9f08a578 917 r = routing_policy_rule_configure(rule, link, NULL);
4ff296b0
YW		 918 if (r < 0)
919 return log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
7ef7e550
YW		 920 if (r > 0)
921 link->routing_policy_rule_messages++;
8a9b3a23
SS		 922 }
923
924 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 925 if (link->routing_policy_rule_messages == 0) {
926 link->routing_policy_rules_configured = true;
927 link_check_ready(link);
b425c3ae 928 } else {
7715629e 929 log_link_debug(link, "Setting routing policy rules");
b425c3ae
YW		 930 link_set_state(link, LINK_STATE_CONFIGURING);
931 }
8a9b3a23
SS		 932
933 return 0;
934}
935
c16c7808
SS		 936static int nexthop_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
937 int r;
938
939 assert(link);
940 assert(link->nexthop_messages > 0);
941 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
942 LINK_STATE_FAILED, LINK_STATE_LINGER));
943
944 link->nexthop_messages--;
945
946 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
947 return 1;
948
949 r = sd_netlink_message_get_errno(m);
950 if (r < 0 && r != -EEXIST) {
5ecb131d 951 log_link_message_warning_errno(link, m, r, "Could not set nexthop");
c16c7808
SS		 952 link_enter_failed(link);
953 return 1;
954 }
955
956 if (link->nexthop_messages == 0) {
957 log_link_debug(link, "Nexthop set");
958 link->static_nexthops_configured = true;
959 link_check_ready(link);
960 }
961
962 return 1;
963}
964
965int link_request_set_nexthop(Link *link) {
966 NextHop *nh;
967 int r;
968
969 LIST_FOREACH(nexthops, nh, link->network->static_nexthops) {
970 r = nexthop_configure(nh, link, nexthop_handler);
971 if (r < 0)
972 return log_link_warning_errno(link, r, "Could not set nexthop: %m");
973 if (r > 0)
974 link->nexthop_messages++;
975 }
976
977 if (link->nexthop_messages == 0) {
978 link->static_nexthops_configured = true;
979 link_check_ready(link);
980 } else {
981 log_link_debug(link, "Setting nexthop");
982 link_set_state(link, LINK_STATE_CONFIGURING);
983 }
984
985 return 1;
986}
987
302a796f 988static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 989 int r;
990
1046bf9b 991 assert(link);
7715629e 992 assert(link->route_messages > 0);
289e6774
WKI		 993 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
994 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 995
7715629e 996 link->route_messages--;
f882c247 997
77a008c0 998 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 999 return 1;
1000
1c4baffc 1001 r = sd_netlink_message_get_errno(m);
4ff296b0 1002 if (r < 0 && r != -EEXIST) {
5ecb131d 1003 log_link_message_warning_errno(link, m, r, "Could not set route");
4ff296b0
YW		 1004 link_enter_failed(link);
1005 return 1;
1006 }
f882c247 1007
7715629e 1008 if (link->route_messages == 0) {
6a7a4e4d 1009 log_link_debug(link, "Routes set");
7715629e 1010 link->static_routes_configured = true;
8012cd39 1011 link_check_ready(link);
dd3efc09 1012 }
f882c247
TG		 1013
1014 return 1;
1015}
1016
b5799eeb 1017int link_request_set_routes(Link *link) {
bf61b05a
LP		 1018 enum {
1019 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
1020 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
1021 _PHASE_MAX
1022 } phase;
a6cc569e 1023 Route *rt;
f882c247
TG		 1024 int r;
1025
1026 assert(link);
1027 assert(link->network);
c42ff3a1
WKI		 1028 assert(link->addresses_configured);
1029 assert(link->address_messages == 0);
289e6774 1030 assert(link->state != _LINK_STATE_INVALID);
f882c247 1031
2428613f 1032 link->static_routes_configured = false;
c16c7808 1033 link->static_routes_ready = false;
27c34f73 1034
4e2ef9d9
YW		 1035 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
1036 /* During configuring addresses, the link lost its carrier. As networkd is dropping
1037 * the addresses now, let's not configure the routes either. */
1038 return 0;
1039
47079967 1040 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 1041 if (r < 0)
1042 return r;
f882c247 1043
bf61b05a
LP		 1044 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
1045 for (phase = 0; phase < _PHASE_MAX; phase++)
1046 LIST_FOREACH(routes, rt, link->network->static_routes) {
1985c54f
YW		 1047 if (rt->gateway_from_dhcp)
1048 continue;
0d34228f 1049
6ff5cc6b 1050 if ((in_addr_is_null(rt->family, &rt->gw) && ordered_set_isempty(rt->multipath_routes)) != (phase == PHASE_NON_GATEWAY))
bf61b05a 1051 continue;
a6cc569e 1052
0d34228f 1053 r = route_configure(rt, link, route_handler);
4ff296b0
YW		 1054 if (r < 0)
1055 return log_link_warning_errno(link, r, "Could not set routes: %m");
c4423317
YW		 1056 if (r > 0)
1057 link->route_messages++;
0d34228f 1058 }
f5be5601 1059
7715629e
ST		 1060 if (link->route_messages == 0) {
1061 link->static_routes_configured = true;
8012cd39 1062 link_check_ready(link);
b425c3ae 1063 } else {
6a7a4e4d 1064 log_link_debug(link, "Setting routes");
b425c3ae
YW		 1065 link_set_state(link, LINK_STATE_CONFIGURING);
1066 }
f882c247
TG		 1067
1068 return 0;
1069}
1070
6accfd31
DA		 1071void link_check_ready(Link *link) {
1072 Address *a;
1073 Iterator i;
4ff296b0 1074 int r;
6accfd31
DA		 1075
1076 assert(link);
1077
1078 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1079 return;
1080
1081 if (!link->network)
1082 return;
1083
1084 if (!link->addresses_configured)
1085 return;
1086
1087 if (!link->neighbors_configured)
1088 return;
1089
6aa5773b
DA		 1090 SET_FOREACH(a, link->addresses, i)
1091 if (!address_is_ready(a))
1092 return;
1093
1094 if (!link->addresses_ready) {
1095 link->addresses_ready = true;
4ff296b0
YW		 1096 r = link_request_set_routes(link);
1097 if (r < 0)
1098 link_enter_failed(link);
710ce9e5 1099 return;
6aa5773b
DA		 1100 }
1101
6accfd31
DA		 1102 if (!link->static_routes_configured)
1103 return;
1104
c16c7808
SS		 1105 if (!link->static_routes_ready) {
1106 link->static_routes_ready = true;
1107 r = link_request_set_nexthop(link);
1108 if (r < 0)
1109 link_enter_failed(link);
1110 return;
1111 }
1112
1113 if (!link->static_nexthops_configured)
1114 return;
1115
6accfd31
DA		 1116 if (!link->routing_policy_rules_configured)
1117 return;
1118
34658df2 1119 if (!link->tc_configured)
4ecdcb07
YW		 1120 return;
1121
463797c1 1122 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
6accfd31 1123
2aa7d367 1124 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !link->ipv4ll_address)
463797c1 1125 return;
6accfd31 1126
463797c1
YW		 1127 if (link_ipv6ll_enabled(link) &&
1128 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
1129 return;
6accfd31 1130
463797c1
YW		 1131 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
1132 !link->dhcp4_configured &&
1133 !link->dhcp6_configured &&
2aa7d367 1134 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address))
463797c1
YW		 1135 /* When DHCP is enabled, at least one protocol must provide an address, or
1136 * an IPv4ll fallback address must be configured. */
1137 return;
1138
1139 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
1140 return;
1141 }
6accfd31 1142
6accfd31
DA		 1143 if (link->state != LINK_STATE_CONFIGURED)
1144 link_enter_configured(link);
1145
1146 return;
1147}
1148
e4a71bf3
WKI		 1149static int link_request_set_neighbors(Link *link) {
1150 Neighbor *neighbor;
1151 int r;
1152
1153 assert(link);
1154 assert(link->network);
1155 assert(link->state != _LINK_STATE_INVALID);
1156
2428613f 1157 link->neighbors_configured = false;
e4a71bf3
WKI		 1158
1159 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
1160 r = neighbor_configure(neighbor, link, NULL);
4ff296b0
YW		 1161 if (r < 0)
1162 return log_link_warning_errno(link, r, "Could not set neighbor: %m");
e4a71bf3
WKI		 1163 }
1164
1165 if (link->neighbor_messages == 0) {
1166 link->neighbors_configured = true;
1167 link_check_ready(link);
b425c3ae 1168 } else {
e4a71bf3 1169 log_link_debug(link, "Setting neighbors");
b425c3ae
YW		 1170 link_set_state(link, LINK_STATE_CONFIGURING);
1171 }
e4a71bf3
WKI		 1172
1173 return 0;
1174}
1175
302a796f 1176static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1177 int r;
1178
4958aee4 1179 assert(rtnl);
f5be5601
TG		 1180 assert(m);
1181 assert(link);
1182 assert(link->ifname);
7715629e 1183 assert(link->address_messages > 0);
289e6774 1184 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1185 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1186
7715629e 1187 link->address_messages--;
f882c247 1188
5da8149f 1189 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1190 return 1;
1191
1c4baffc 1192 r = sd_netlink_message_get_errno(m);
4ff296b0 1193 if (r < 0 && r != -EEXIST) {
5ecb131d 1194 log_link_message_warning_errno(link, m, r, "Could not set address");
4ff296b0
YW		 1195 link_enter_failed(link);
1196 return 1;
1197 } else if (r >= 0)
1198 (void) manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1199
7715629e 1200 if (link->address_messages == 0) {
6a7a4e4d 1201 log_link_debug(link, "Addresses set");
c42ff3a1 1202 link->addresses_configured = true;
6aa5773b 1203 link_check_ready(link);
dd3efc09 1204 }
f882c247
TG		 1205
1206 return 1;
1207}
1208
f6bb7ac5
TJ		 1209static int link_set_bridge_fdb(Link *link) {
1210 FdbEntry *fdb_entry;
197e2809 1211 int r;
f6bb7ac5
TJ		 1212
1213 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1214 r = fdb_entry_configure(link, fdb_entry);
197e2809 1215 if (r < 0)
f6bb7ac5 1216 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1217 }
1218
197e2809 1219 return 0;
f6bb7ac5
TJ		 1220}
1221
289e6774 1222static int link_request_set_addresses(Link *link) {
95b74ef6 1223 AddressLabel *label;
a6cc569e 1224 Address *ad;
bd6379ec 1225 Prefix *p;
f882c247
TG		 1226 int r;
1227
1228 assert(link);
1229 assert(link->network);
f5be5601 1230 assert(link->state != _LINK_STATE_INVALID);
f882c247 1231
2428613f
YW		 1232 /* Reset all *_configured flags we are configuring. */
1233 link->addresses_configured = false;
6aa5773b 1234 link->addresses_ready = false;
2428613f
YW		 1235 link->neighbors_configured = false;
1236 link->static_routes_configured = false;
c16c7808
SS		 1237 link->static_routes_ready = false;
1238 link->static_nexthops_configured = false;
2428613f
YW		 1239 link->routing_policy_rules_configured = false;
1240
f6bb7ac5
TJ		 1241 r = link_set_bridge_fdb(link);
1242 if (r < 0)
1243 return r;
1244
f3ef324d
YW		 1245 r = link_request_set_neighbors(link);
1246 if (r < 0)
1247 return r;
e4a71bf3 1248
3d3d4255 1249 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1250 bool update;
1251
1252 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1253
1254 r = address_configure(ad, link, address_handler, update);
4ff296b0
YW		 1255 if (r < 0)
1256 return log_link_warning_errno(link, r, "Could not set addresses: %m");
54a1a535
YW		 1257 if (r > 0)
1258 link->address_messages++;
95b74ef6
SS		 1259 }
1260
bd6379ec
SS		 1261 if (IN_SET(link->network->router_prefix_delegation,
1262 RADV_PREFIX_DELEGATION_STATIC,
1263 RADV_PREFIX_DELEGATION_BOTH))
1264 LIST_FOREACH(prefixes, p, link->network->static_prefixes) {
1265 _cleanup_(address_freep) Address *address = NULL;
1266
1267 if (!p->assign)
1268 continue;
1269
1270 r = address_new(&address);
1271 if (r < 0)
1272 return log_link_error_errno(link, r, "Could not allocate address: %m");
1273
1274 r = sd_radv_prefix_get_prefix(p->radv_prefix, &address->in_addr.in6, &address->prefixlen);
1275 if (r < 0)
1276 return r;
1277
1278 r = generate_ipv6_eui_64_address(link, &address->in_addr.in6);
1279 if (r < 0)
1280 return r;
1281
1282 address->family = AF_INET6;
1283 r = address_configure(address, link, address_handler, true);
1284 if (r < 0)
1285 return log_link_warning_errno(link, r, "Could not set addresses: %m");
1286 if (r > 0)
1287 link->address_messages++;
1288 }
1289
95b74ef6 1290 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1291 r = address_label_configure(label, link, NULL, false);
4ff296b0
YW		 1292 if (r < 0)
1293 return log_link_warning_errno(link, r, "Could not set address label: %m");
f5be5601 1294
7715629e 1295 link->address_label_messages++;
f882c247
TG		 1296 }
1297
d4cdbea5
TG		 1298 /* now that we can figure out a default address for the dhcp server,
1299 start it */
708c425d 1300 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
8fcf1d61 1301 r = dhcp4_server_configure(link);
4ff296b0 1302 if (r < 0)
d4cdbea5 1303 return r;
6a7a4e4d 1304 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1305 }
1306
c42ff3a1
WKI		 1307 if (link->address_messages == 0) {
1308 link->addresses_configured = true;
6aa5773b 1309 link_check_ready(link);
b425c3ae 1310 } else {
6a7a4e4d 1311 log_link_debug(link, "Setting addresses");
b425c3ae
YW		 1312 link_set_state(link, LINK_STATE_CONFIGURING);
1313 }
431ca2ce 1314
f882c247
TG		 1315 return 0;
1316}
1317
13b498f9 1318static int link_set_bridge_vlan(Link *link) {
86e2be7b 1319 int r;
13b498f9
TJ		 1320
1321 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1322 if (r < 0)
1323 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1324
1325 return r;
1326}
1327
a60a720c 1328static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1329 int r;
1330
1331 if (!link_proxy_arp_enabled(link))
1332 return 0;
1333
62e021a9 1334 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1335 if (r < 0)
1336 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1337
1338 return 0;
1339}
1340
3a390124 1341static int link_configure_continue(Link *link);
55dc8c4a 1342
302a796f 1343static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1344 int r;
1345
1346 assert(m);
1347 assert(link);
1348 assert(link->ifname);
1349
55dc8c4a
YW		 1350 link->setting_mtu = false;
1351
5da8149f 1352 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1353 return 1;
1354
1c4baffc 1355 r = sd_netlink_message_get_errno(m);
4ff296b0 1356 if (r < 0)
5ecb131d 1357 log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring");
4ff296b0
YW		 1358 else
1359 log_link_debug(link, "Setting MTU done.");
55dc8c4a 1360
4ff296b0 1361 if (link->state == LINK_STATE_INITIALIZED) {
3a390124 1362 r = link_configure_continue(link);
4ff296b0
YW		 1363 if (r < 0)
1364 link_enter_failed(link);
1365 }
4f882b2a
TG		 1366
1367 return 1;
1368}
1369
933c70a0 1370int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1371 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1372 int r;
1373
1374 assert(link);
1375 assert(link->manager);
1376 assert(link->manager->rtnl);
1377
40288ece
YW		 1378 if (mtu == 0 || link->setting_mtu)
1379 return 0;
1380
933c70a0 1381 if (link->mtu == mtu)
ee493106
YW		 1382 return 0;
1383
6a7a4e4d 1384 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1385
6a7a4e4d
LP		 1386 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1387 if (r < 0)
1388 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1389
44b598a1 1390 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1391 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1392 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1393
1394 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
d236718c 1395 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes");
44b598a1 1396
72c2500b 1397 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1398 }
1399
1c4baffc 1400 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1401 if (r < 0)
1402 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1403
302a796f
YW		 1404 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1405 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1406 if (r < 0)
1407 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1408
ae941762 1409 link_ref(link);
1046bf9b 1410 link->setting_mtu = true;
b226d99b 1411
4f882b2a
TG		 1412 return 0;
1413}
1414
f6fcc1c2
YW		 1415static bool link_reduces_vlan_mtu(Link *link) {
1416 /* See netif_reduces_vlan_mtu() in kernel. */
1417 return streq_ptr(link->kind, "macsec");
1418}
1419
1420static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1421 uint32_t mtu = 0;
1422 NetDev *dev;
1423 Iterator i;
1424
1425 HASHMAP_FOREACH(dev, link->network->stacked_netdevs, i)
1426 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1427 /* See vlan_dev_change_mtu() in kernel. */
1428 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1429
1430 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1431 /* See macvlan_change_mtu() in kernel. */
1432 mtu = dev->mtu;
1433
1434 return mtu;
1435}
1436
1437static int link_configure_mtu(Link *link) {
1438 uint32_t mtu;
1439
1440 assert(link);
1441 assert(link->network);
1442
1443 if (link->network->mtu > 0)
1444 return link_set_mtu(link, link->network->mtu);
1445
1446 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1447 if (link->mtu >= mtu)
1448 return 0;
1449
1450 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1451 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1452 link->mtu, mtu);
1453
1454 return link_set_mtu(link, mtu);
1455}
1456
302a796f 1457static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1458 int r;
1459
1460 assert(m);
1461 assert(link);
1462 assert(link->ifname);
1463
1464 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1465 return 1;
1466
1467 r = sd_netlink_message_get_errno(m);
1468 if (r < 0)
5ecb131d 1469 log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring");
99d2baa2
SS		 1470
1471 return 1;
1472}
1473
1474static int link_set_flags(Link *link) {
1475 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1476 unsigned ifi_change = 0;
1477 unsigned ifi_flags = 0;
1478 int r;
1479
1480 assert(link);
1481 assert(link->manager);
1482 assert(link->manager->rtnl);
1483
1484 if (link->flags & IFF_LOOPBACK)
1485 return 0;
1486
1487 if (!link->network)
1488 return 0;
1489
866e6b7a 1490 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1491 return 0;
1492
1493 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1494 if (r < 0)
1495 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1496
1497 if (link->network->arp >= 0) {
1498 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1499 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1500 }
1501
1502 if (link->network->multicast >= 0) {
1503 ifi_change |= IFF_MULTICAST;
1504 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1505 }
1506
866e6b7a
SS		 1507 if (link->network->allmulticast >= 0) {
1508 ifi_change |= IFF_ALLMULTI;
1509 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1510 }
1511
99d2baa2
SS		 1512 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1513 if (r < 0)
1514 return log_link_error_errno(link, r, "Could not set link flags: %m");
1515
302a796f
YW		 1516 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1517 link_netlink_destroy_callback, link);
99d2baa2
SS		 1518 if (r < 0)
1519 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1520
1521 link_ref(link);
1522
1523 return 0;
1524}
1525
e7ab854c
TG		 1526static int link_acquire_ipv6_conf(Link *link) {
1527 int r;
1528
1529 assert(link);
1530
e7ab854c 1531 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1532 assert(link->ndisc);
e7ab854c
TG		 1533
1534 log_link_debug(link, "Discovering IPv6 routers");
1535
1e7a0e21 1536 r = sd_ndisc_start(link->ndisc);
63348d13 1537 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1538 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1539 }
1540
7465dd22
PF		 1541 if (link_radv_enabled(link)) {
1542 assert(link->radv);
1543 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1544
1545 log_link_debug(link, "Starting IPv6 Router Advertisements");
1546
fd3ef936
YW		 1547 r = radv_emit_dns(link);
1548 if (r < 0)
1549 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
1550
7465dd22
PF		 1551 r = sd_radv_start(link->radv);
1552 if (r < 0 && r != -EBUSY)
1553 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1554 }
1555
cd305af1
SS		 1556 if (link_dhcp6_enabled(link) && link->network->dhcp6_without_ra) {
1557 assert(link->dhcp6_client);
1558 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1559
1560 r = dhcp6_request_address(link, true);
1561 if (r < 0 && r != -EBUSY)
1562 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
1563 else
1564 log_link_debug(link, "Acquiring DHCPv6 lease");
1565 }
1566
10752343
PF		 1567 (void) dhcp6_request_prefix_delegation(link);
1568
e7ab854c
TG		 1569 return 0;
1570}
1571
6fc25497 1572static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1573 int r;
1574
1575 assert(link);
ff254138
TG		 1576 assert(link->manager);
1577 assert(link->manager->event);
1578
910feb78 1579 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1580 assert(link->ipv4ll);
ff254138 1581
6a7a4e4d 1582 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1583
1584 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1585 if (r < 0)
1586 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1587 }
1588
78c958f8 1589 if (link_dhcp4_enabled(link)) {
eb34d4af 1590 assert(link->dhcp_client);
ff254138 1591
6a7a4e4d 1592 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1593
5c1d3fc9 1594 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1595 if (r < 0)
1596 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1597 }
ff254138 1598
6fc25497
SS		 1599 return 0;
1600}
1601
1602static int link_acquire_conf(Link *link) {
1603 int r;
1604
1605 assert(link);
1606
1607 r = link_acquire_ipv4_conf(link);
1608 if (r < 0)
1609 return r;
1610
3f7cc080 1611 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1612 r = link_acquire_ipv6_conf(link);
1613 if (r < 0)
1614 return r;
1615 }
1616
7272b25e
LP		 1617 if (link_lldp_emit_enabled(link)) {
1618 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1619 if (r < 0)
1620 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1621 }
1622
ff254138
TG		 1623 return 0;
1624}
1625
a61bb41c 1626bool link_has_carrier(Link *link) {
deb2e523
TG		 1627 /* see Documentation/networking/operstates.txt in the kernel sources */
1628
a61bb41c 1629 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1630 return true;
1631
a61bb41c 1632 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1633 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1634 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1635 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1636 return true;
1637
1638 return false;
1639}
1640
0e2fdb83
SS		 1641static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1642 int r;
1643
1644 assert(link);
1645
9524014e
DS		 1646 link->setting_genmode = false;
1647
0e2fdb83
SS		 1648 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1649 return 1;
1650
1651 r = sd_netlink_message_get_errno(m);
1652 if (r < 0)
5ecb131d 1653 log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring");
9524014e
DS		 1654 else
1655 log_link_debug(link, "Setting address genmode done.");
1656
1657 if (link->state == LINK_STATE_INITIALIZED) {
1658 r = link_configure_continue(link);
1659 if (r < 0)
1660 link_enter_failed(link);
1661 }
0e2fdb83
SS		 1662
1663 return 1;
1664}
1665
1666static int link_configure_addrgen_mode(Link *link) {
1667 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1668 uint8_t ipv6ll_mode;
1669 int r;
1670
1671 assert(link);
1672 assert(link->network);
1673 assert(link->manager);
1674 assert(link->manager->rtnl);
1675
9524014e 1676 if (!socket_ipv6_is_supported() || link->setting_genmode)
9f6e82e6
YW		 1677 return 0;
1678
0e2fdb83
SS		 1679 log_link_debug(link, "Setting address genmode for link");
1680
1681 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1682 if (r < 0)
1683 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1684
1685 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1686 if (r < 0)
1687 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1688
1689 r = sd_netlink_message_open_container(req, AF_INET6);
1690 if (r < 0)
1691 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1692
1693 if (!link_ipv6ll_enabled(link))
1694 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
826a3602 1695 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
8956caf3 1696 /* The file may not exist. And even if it exists, when stable_secret is unset,
826a3602
YW		 1697 * reading the file fails with EIO. */
1698 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1699 else
1700 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
0e2fdb83
SS		 1701
1702 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1703 if (r < 0)
1704 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1705
1706 r = sd_netlink_message_close_container(req);
1707 if (r < 0)
1708 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1709
1710 r = sd_netlink_message_close_container(req);
1711 if (r < 0)
1712 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1713
1714 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1715 link_netlink_destroy_callback, link);
1716 if (r < 0)
1717 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1718
1719 link_ref(link);
9524014e 1720 link->setting_genmode = true;
0e2fdb83
SS		 1721
1722 return 0;
1723}
1724
302a796f 1725static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1726 int r;
1727
1746cf2a
TG		 1728 assert(link);
1729
5da8149f 1730 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1731 return 1;
1732
1c4baffc 1733 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1734 if (r < 0)
26d6b214 1735 /* we warn but don't fail the link, as it may be brought up later */
5ecb131d 1736 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
45ad2c13 1737
f882c247
TG		 1738 return 1;
1739}
1740
1cc84f3b 1741static int link_up(Link *link) {
4afd3348 1742 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1743 int r;
1744
f882c247 1745 assert(link);
c106cc36 1746 assert(link->network);
f882c247
TG		 1747 assert(link->manager);
1748 assert(link->manager->rtnl);
1749
6a7a4e4d 1750 log_link_debug(link, "Bringing link up");
449f7554 1751
6a7a4e4d
LP		 1752 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1753 if (r < 0)
1754 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1755
2b2d8603 1756 /* set it free if not enslaved with networkd */
6cb955c6 1757 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1758 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1759 if (r < 0)
1760 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1761 }
1762
5d4795f3 1763 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1764 if (r < 0)
1765 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1766
c106cc36 1767 if (link->network->mac) {
1c4baffc 1768 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1769 if (r < 0)
1770 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1771 }
1772
302a796f
YW		 1773 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1774 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1775 if (r < 0)
1776 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1777
b226d99b
TG		 1778 link_ref(link);
1779
f882c247
TG		 1780 return 0;
1781}
1782
302a796f 1783static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1784 int r;
1785
1786 assert(link);
1787
1788 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1789 return 1;
1790
1c4baffc 1791 r = sd_netlink_message_get_errno(m);
0d4ad91d 1792 if (r < 0)
5ecb131d 1793 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
0d4ad91d
AR		 1794
1795 return 1;
1796}
1797
8e54db83 1798int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1799 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1800 int r;
1801
1802 assert(link);
1803 assert(link->manager);
1804 assert(link->manager->rtnl);
1805
6a7a4e4d 1806 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1807
1808 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1809 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1810 if (r < 0)
1811 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1812
1813 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1814 if (r < 0)
1815 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1816
8e54db83
YW		 1817 r = netlink_call_async(link->manager->rtnl, NULL, req,
1818 callback ?: link_down_handler,
302a796f 1819 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1820 if (r < 0)
1821 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1822
1823 link_ref(link);
1824
1825 return 0;
1826}
1827
89fe6535
SS		 1828static int link_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1829 int r;
1830
1831 assert(link);
1832
1833 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1834 return 1;
1835
1836 r = sd_netlink_message_get_errno(m);
1837 if (r < 0)
1838 log_link_message_warning_errno(link, m, r, "Could not set group for the interface");
1839
1840 return 1;
1841}
1842
1843static int link_set_group(Link *link) {
1844 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1845 int r;
1846
1847 assert(link);
1848 assert(link->network);
1849 assert(link->manager);
1850 assert(link->manager->rtnl);
1851
1852 if (link->network->group <= 0)
1853 return 0;
1854
1855 log_link_debug(link, "Setting group");
1856
1857 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1858 if (r < 0)
1859 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1860
1861 r = sd_netlink_message_append_u32(req, IFLA_GROUP, link->network->group);
1862 if (r < 0)
1863 return log_link_error_errno(link, r, "Could not set link group: %m");
1864
1865 r = netlink_call_async(link->manager->rtnl, NULL, req, link_group_handler,
1866 link_netlink_destroy_callback, link);
1867 if (r < 0)
1868 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1869
1870 link_ref(link);
1871
1872 return 0;
1873}
1874
0d4ad91d
AR		 1875static int link_handle_bound_to_list(Link *link) {
1876 Link *l;
1877 Iterator i;
1878 int r;
1879 bool required_up = false;
1880 bool link_is_up = false;
1881
1882 assert(link);
1883
1884 if (hashmap_isempty(link->bound_to_links))
1885 return 0;
1886
1887 if (link->flags & IFF_UP)
1888 link_is_up = true;
1889
1890 HASHMAP_FOREACH (l, link->bound_to_links, i)
1891 if (link_has_carrier(l)) {
1892 required_up = true;
1893 break;
1894 }
1895
1896 if (!required_up && link_is_up) {
8e54db83 1897 r = link_down(link, NULL);
0d4ad91d
AR		 1898 if (r < 0)
1899 return r;
1900 } else if (required_up && !link_is_up) {
1901 r = link_up(link);
1902 if (r < 0)
1903 return r;
1904 }
1905
1906 return 0;
1907}
1908
1909static int link_handle_bound_by_list(Link *link) {
1910 Iterator i;
1911 Link *l;
1912 int r;
1913
1914 assert(link);
1915
1916 if (hashmap_isempty(link->bound_by_links))
1917 return 0;
1918
1919 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1920 r = link_handle_bound_to_list(l);
1921 if (r < 0)
1922 return r;
1923 }
1924
1925 return 0;
1926}
1927
1928static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1929 int r;
1930
1931 assert(link);
1932 assert(carrier);
1933
1934 if (link == carrier)
1935 return 0;
1936
1937 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1938 return 0;
1939
1940 r = hashmap_ensure_allocated(h, NULL);
1941 if (r < 0)
1942 return r;
1943
1944 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1945 if (r < 0)
1946 return r;
1947
1948 return 0;
1949}
1950
1951static int link_new_bound_by_list(Link *link) {
1952 Manager *m;
1953 Link *carrier;
1954 Iterator i;
1955 int r;
1956 bool list_updated = false;
1957
1958 assert(link);
1959 assert(link->manager);
1960
1961 m = link->manager;
1962
b295beea 1963 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 1964 if (!carrier->network)
1965 continue;
1966
1967 if (strv_isempty(carrier->network->bind_carrier))
1968 continue;
1969
191a3f16 1970 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 1971 r = link_put_carrier(link, carrier, &link->bound_by_links);
1972 if (r < 0)
1973 return r;
1974
1975 list_updated = true;
1976 }
1977 }
1978
1979 if (list_updated)
84de38c5 1980 link_dirty(link);
0d4ad91d 1981
b295beea 1982 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 1983 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1984 if (r < 0)
1985 return r;
1986
84de38c5 1987 link_dirty(carrier);
0d4ad91d
AR		 1988 }
1989
1990 return 0;
1991}
1992
1993static int link_new_bound_to_list(Link *link) {
1994 Manager *m;
1995 Link *carrier;
1996 Iterator i;
1997 int r;
1998 bool list_updated = false;
1999
2000 assert(link);
2001 assert(link->manager);
2002
2003 if (!link->network)
2004 return 0;
2005
2006 if (strv_isempty(link->network->bind_carrier))
2007 return 0;
2008
2009 m = link->manager;
2010
2011 HASHMAP_FOREACH (carrier, m->links, i) {
191a3f16 2012 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 2013 r = link_put_carrier(link, carrier, &link->bound_to_links);
2014 if (r < 0)
2015 return r;
2016
2017 list_updated = true;
2018 }
2019 }
2020
2021 if (list_updated)
84de38c5 2022 link_dirty(link);
0d4ad91d
AR		 2023
2024 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2025 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2026 if (r < 0)
2027 return r;
2028
84de38c5 2029 link_dirty(carrier);
0d4ad91d
AR		 2030 }
2031
2032 return 0;
2033}
2034
2035static int link_new_carrier_maps(Link *link) {
2036 int r;
2037
2038 r = link_new_bound_by_list(link);
2039 if (r < 0)
2040 return r;
2041
2042 r = link_handle_bound_by_list(link);
2043 if (r < 0)
2044 return r;
2045
2046 r = link_new_bound_to_list(link);
2047 if (r < 0)
2048 return r;
2049
2050 r = link_handle_bound_to_list(link);
2051 if (r < 0)
2052 return r;
2053
2054 return 0;
2055}
2056
2057static void link_free_bound_to_list(Link *link) {
2058 Link *bound_to;
2059 Iterator i;
2060
2061 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2062 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2063
2064 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2065 link_dirty(bound_to);
0d4ad91d
AR		 2066 }
2067
2068 return;
2069}
2070
2071static void link_free_bound_by_list(Link *link) {
2072 Link *bound_by;
2073 Iterator i;
2074
2075 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2076 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2077
2078 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2079 link_dirty(bound_by);
0d4ad91d
AR		 2080 link_handle_bound_to_list(bound_by);
2081 }
2082 }
2083
2084 return;
2085}
2086
2087static void link_free_carrier_maps(Link *link) {
2088 bool list_updated = false;
2089
2090 assert(link);
2091
2092 if (!hashmap_isempty(link->bound_to_links)) {
2093 link_free_bound_to_list(link);
2094 list_updated = true;
2095 }
2096
2097 if (!hashmap_isempty(link->bound_by_links)) {
2098 link_free_bound_by_list(link);
2099 list_updated = true;
2100 }
2101
2102 if (list_updated)
84de38c5 2103 link_dirty(link);
0d4ad91d
AR		 2104
2105 return;
2106}
2107
5f707e12
YW		 2108static int link_append_to_master(Link *link, NetDev *netdev) {
2109 Link *master;
2110 int r;
2111
2112 assert(link);
2113 assert(netdev);
2114
2115 r = link_get(link->manager, netdev->ifindex, &master);
2116 if (r < 0)
2117 return r;
2118
2119 r = set_ensure_allocated(&master->slaves, NULL);
2120 if (r < 0)
2121 return r;
2122
2123 r = set_put(master->slaves, link);
38288f0b 2124 if (r <= 0)
5f707e12
YW		 2125 return r;
2126
2127 link_ref(link);
2128 return 0;
2129}
2130
2131static void link_drop_from_master(Link *link, NetDev *netdev) {
2132 Link *master;
2133
2134 assert(link);
2135
2136 if (!link->manager || !netdev)
2137 return;
2138
2139 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2140 return;
2141
2142 link_unref(set_remove(master->slaves, link));
2143}
2144
2145static void link_detach_from_manager(Link *link) {
2146 if (!link || !link->manager)
2147 return;
2148
2149 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2150 link_clean(link);
2151
2152 /* The following must be called at last. */
2153 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2154 link_unref(link);
2155}
2156
0d4ad91d
AR		 2157void link_drop(Link *link) {
2158 if (!link || link->state == LINK_STATE_LINGER)
2159 return;
2160
2161 link_set_state(link, LINK_STATE_LINGER);
2162
2163 link_free_carrier_maps(link);
2164
5f707e12
YW		 2165 if (link->network) {
2166 link_drop_from_master(link, link->network->bridge);
2167 link_drop_from_master(link, link->network->bond);
2168 }
2169
6a7a4e4d 2170 log_link_debug(link, "Link removed");
0d4ad91d 2171
db2f8a2e 2172 (void) unlink(link->state_file);
c4397d94 2173 link_detach_from_manager(link);
0d4ad91d
AR		 2174}
2175
3f265037 2176static int link_joined(Link *link) {
f882c247
TG		 2177 int r;
2178
ef1ba606 2179 assert(link);
f5be5601 2180 assert(link->network);
dd3efc09 2181
0d4ad91d
AR		 2182 if (!hashmap_isempty(link->bound_to_links)) {
2183 r = link_handle_bound_to_list(link);
2184 if (r < 0)
2185 return r;
2186 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2187 r = link_up(link);
2188 if (r < 0) {
2189 link_enter_failed(link);
2190 return r;
2191 }
ef1ba606 2192 }
f882c247 2193
9ed794a3 2194 if (link->network->bridge) {
e1853b00 2195 r = link_set_bridge(link);
6a7a4e4d
LP		 2196 if (r < 0)
2197 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 2198
2199 r = link_append_to_master(link, link->network->bridge);
2200 if (r < 0)
2201 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 2202 }
2203
eb64b435 2204 if (link->network->bond) {
7fcee284 2205 r = link_set_bond(link);
eb64b435
SS		 2206 if (r < 0)
2207 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2208
45e11abf 2209 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2210 if (r < 0)
2211 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2212 }
2213
ffff9abe
TJ		 2214 if (link->network->use_br_vlan &&
2215 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2216 r = link_set_bridge_vlan(link);
2217 if (r < 0)
2218 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2219 }
2220
c1835a42
RM		 2221 /* Skip setting up addresses until it gets carrier,
2222 or it would try to set addresses twice,
2223 which is bad for non-idempotent steps. */
dad2d78e 2224 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2225 return 0;
2226
b425c3ae 2227 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 2228 return link_request_set_addresses(link);
02b59d57
TG		 2229}
2230
302a796f 2231static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2232 int r;
2233
1746cf2a 2234 assert(link);
ef1ba606 2235 assert(link->network);
34bf3c00 2236 assert(link->enslaving > 0);
02b59d57 2237
313cefa1 2238 link->enslaving--;
52433f6b 2239
5da8149f 2240 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2241 return 1;
2242
1c4baffc 2243 r = sd_netlink_message_get_errno(m);
856f962c 2244 if (r < 0 && r != -EEXIST) {
5ecb131d 2245 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG		 2246 link_enter_failed(link);
2247 return 1;
4ff296b0
YW		 2248 }
2249
2250 log_link_debug(link, "Joined netdev");
02b59d57 2251
34bf3c00 2252 if (link->enslaving == 0) {
4ff296b0
YW		 2253 r = link_joined(link);
2254 if (r < 0)
2255 link_enter_failed(link);
34bf3c00 2256 }
02b59d57
TG		 2257
2258 return 1;
2259}
2260
3f265037 2261static int link_enter_join_netdev(Link *link) {
6a0a2f86 2262 NetDev *netdev;
672682a6 2263 Iterator i;
02b59d57
TG		 2264 int r;
2265
2266 assert(link);
2267 assert(link->network);
bd08ce56 2268 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2269
289e6774 2270 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2271
84de38c5 2272 link_dirty(link);
34bf3c00 2273 link->enslaving = 0;
02b59d57 2274
d9c67ea1 2275 if (link->network->bond) {
cbff7170
TJ		 2276 if (link->network->bond->state == NETDEV_STATE_READY &&
2277 link->network->bond->ifindex == link->master_ifindex)
2278 return link_joined(link);
2279
f2341e0a
LP		 2280 log_struct(LOG_DEBUG,
2281 LOG_LINK_INTERFACE(link),
2282 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2283 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2284
34bf3c00
YW		 2285 link->enslaving++;
2286
f2341e0a 2287 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2288 if (r < 0) {
f2341e0a
LP		 2289 log_struct_errno(LOG_WARNING, r,
2290 LOG_LINK_INTERFACE(link),
2291 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2292 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2293 link_enter_failed(link);
2294 return r;
2295 }
0ad6148e
MO		 2296 }
2297
d9c67ea1 2298 if (link->network->bridge) {
f2341e0a
LP		 2299 log_struct(LOG_DEBUG,
2300 LOG_LINK_INTERFACE(link),
2301 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2302 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2303
34bf3c00
YW		 2304 link->enslaving++;
2305
f2341e0a 2306 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2307 if (r < 0) {
f2341e0a
LP		 2308 log_struct_errno(LOG_WARNING, r,
2309 LOG_LINK_INTERFACE(link),
2310 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2311 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2312 link_enter_failed(link);
2313 return r;
2314 }
52433f6b
TG		 2315 }
2316
6cb955c6
AR		 2317 if (link->network->vrf) {
2318 log_struct(LOG_DEBUG,
2319 LOG_LINK_INTERFACE(link),
2320 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2321 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2322
34bf3c00
YW		 2323 link->enslaving++;
2324
6cb955c6
AR		 2325 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2326 if (r < 0) {
2327 log_struct_errno(LOG_WARNING, r,
2328 LOG_LINK_INTERFACE(link),
2329 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2330 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2331 link_enter_failed(link);
2332 return r;
2333 }
6cb955c6
AR		 2334 }
2335
6a0a2f86 2336 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2337
2b6db913
YW		 2338 if (netdev->ifindex > 0)
2339 /* Assume already enslaved. */
a63e5daa 2340 continue;
a63e5daa 2341
7033af49
YW		 2342 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2343 continue;
2344
f2341e0a
LP		 2345 log_struct(LOG_DEBUG,
2346 LOG_LINK_INTERFACE(link),
2347 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2348 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2349
34bf3c00
YW		 2350 link->enslaving++;
2351
f2341e0a 2352 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2353 if (r < 0) {
f2341e0a
LP		 2354 log_struct_errno(LOG_WARNING, r,
2355 LOG_LINK_INTERFACE(link),
2356 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2357 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2358 link_enter_failed(link);
2359 return r;
2360 }
326cb406
SS		 2361 }
2362
34bf3c00
YW		 2363 if (link->enslaving == 0)
2364 return link_joined(link);
2365
ef1ba606
TG		 2366 return 0;
2367}
2368
769d324c 2369static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2370 int r;
2371
765afd5c 2372 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2373 return 0;
2374
765afd5c
LP		 2375 /* We propagate the forwarding flag from one interface to the
2376 * global setting one way. This means: as long as at least one
2377 * interface was configured at any time that had IP forwarding
2378 * enabled the setting will stay on for good. We do this
2379 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2380 * somewhat in sync (see below). */
15dee3f0 2381
62e021a9 2382 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2383 if (r < 0)
765afd5c 2384 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2385
769d324c
LP		 2386 return 0;
2387}
2388
2389static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2390 int r;
2391
765afd5c 2392 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2393 return 0;
2394
61233823 2395 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2396 * packet forwarding setting: either packet forwarding is on
2397 * for all, or off for all. We hence don't bother with a
2398 * per-interface setting, but simply propagate the interface
2399 * flag, if it is set, to the global flag, one-way. Note that
2400 * while IPv4 would allow a per-interface flag, we expose the
2401 * same behaviour there and also propagate the setting from
2402 * one to all, to keep things simple (see above). */
15dee3f0 2403
62e021a9 2404 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2405 if (r < 0)
765afd5c 2406 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2407
2408 return 0;
2409}
2410
49092e22 2411static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2412 IPv6PrivacyExtensions s;
49092e22
SS		 2413 int r;
2414
1f0d9695 2415 s = link_ipv6_privacy_extensions(link);
66a6bd68 2416 if (s < 0)
49092e22
SS		 2417 return 0;
2418
62e021a9 2419 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2420 if (r < 0)
49092e22
SS		 2421 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2422
2423 return 0;
2424}
2425
4f2e437a 2426static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2427 int r;
2428
2429 /* Make this a NOP if IPv6 is not available */
2430 if (!socket_ipv6_is_supported())
2431 return 0;
2432
2433 if (link->flags & IFF_LOOPBACK)
2434 return 0;
2435
d68e2e59
LP		 2436 if (!link->network)
2437 return 0;
2438
62e021a9 2439 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2440 if (r < 0)
fe307276 2441 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2442
2443 return 0;
2444}
2445
8749cbcd 2446static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2447 int r;
2448
2449 /* Make this a NOP if IPv6 is not available */
2450 if (!socket_ipv6_is_supported())
2451 return 0;
2452
2453 if (link->flags & IFF_LOOPBACK)
2454 return 0;
2455
d68e2e59
LP		 2456 if (!link->network)
2457 return 0;
2458
8749cbcd
SS		 2459 if (link->network->ipv6_dad_transmits < 0)
2460 return 0;
2461
62e021a9 2462 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2463 if (r < 0)
8749cbcd 2464 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2465
2466 return 0;
2467}
2468
b69c3180 2469static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2470 int r;
2471
2472 /* Make this a NOP if IPv6 is not available */
2473 if (!socket_ipv6_is_supported())
2474 return 0;
2475
2476 if (link->flags & IFF_LOOPBACK)
2477 return 0;
2478
d68e2e59
LP		 2479 if (!link->network)
2480 return 0;
2481
b69c3180
SS		 2482 if (link->network->ipv6_hop_limit < 0)
2483 return 0;
2484
62e021a9 2485 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2486 if (r < 0)
b69c3180 2487 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2488
2489 return 0;
2490}
2491
11102cba 2492static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2493 int r;
2494
2495 /* Make this a NOP if IPv6 is not available */
2496 if (!socket_ipv6_is_supported())
2497 return 0;
2498
2499 if (link->flags & IFF_LOOPBACK)
2500 return 0;
2501
2502 if (link->network->ipv6_mtu == 0)
2503 return 0;
2504
d236718c
DS		 2505 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
2506 * on the interface. Bump up IPv6 MTU bytes to IPV6_MTU_MIN. */
2507 if (link->network->ipv6_mtu < IPV6_MIN_MTU) {
2508 log_link_notice(link, "Bumping IPv6 MTU to "STRINGIFY(IPV6_MIN_MTU)" byte minimum required");
2509 link->network->ipv6_mtu = IPV6_MIN_MTU;
2510 }
2511
62e021a9 2512 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
d236718c
DS		 2513 if (r < 0) {
2514 if (link->mtu < link->network->ipv6_mtu)
2515 log_link_warning(link, "Cannot set IPv6 MTU %"PRIu32" higher than device MTU %"PRIu32,
2516 link->network->ipv6_mtu, link->mtu);
2517 else
2518 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2519 }
2520
2521 link->ipv6_mtu_set = true;
11102cba
SS		 2522
2523 return 0;
2524}
2525
30226d27
TJ		 2526static bool link_is_static_address_configured(Link *link, Address *address) {
2527 Address *net_address;
2528
2529 assert(link);
2530 assert(address);
2531
2532 if (!link->network)
2533 return false;
2534
2535 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2536 if (address_equal(net_address, address))
2537 return true;
2538
2539 return false;
2540}
2541
d1bdafd2
WKI		 2542static bool link_is_neighbor_configured(Link *link, Neighbor *neighbor) {
2543 Neighbor *net_neighbor;
2544
2545 assert(link);
2546 assert(neighbor);
2547
2548 if (!link->network)
2549 return false;
2550
2551 LIST_FOREACH(neighbors, net_neighbor, link->network->neighbors)
2552 if (neighbor_equal(net_neighbor, neighbor))
2553 return true;
2554
2555 return false;
2556}
2557
7ecf0c3e
TJ		 2558static bool link_is_static_route_configured(Link *link, Route *route) {
2559 Route *net_route;
2560
2561 assert(link);
2562 assert(route);
2563
2564 if (!link->network)
2565 return false;
2566
2567 LIST_FOREACH(routes, net_route, link->network->static_routes)
2568 if (route_equal(net_route, route))
2569 return true;
2570
2571 return false;
2572}
2573
db51778f
YW		 2574static bool link_address_is_dynamic(Link *link, Address *address) {
2575 Route *route;
2576 Iterator i;
2577
2578 assert(link);
2579 assert(address);
2580
2581 if (address->cinfo.ifa_prefered != CACHE_INFO_INFINITY_LIFE_TIME)
2582 return true;
2583
2584 /* Even when the address is leased from a DHCP server, networkd assign the address
2585 * without lifetime when KeepConfiguration=dhcp. So, let's check that we have
2586 * corresponding routes with RTPROT_DHCP. */
2587 SET_FOREACH(route, link->routes_foreign, i) {
2588 if (route->protocol != RTPROT_DHCP)
2589 continue;
2590
2591 if (address->family != route->family)
2592 continue;
2593
2594 if (in_addr_equal(address->family, &address->in_addr, &route->prefsrc))
2595 return true;
2596 }
2597
2598 return false;
2599}
2600
0917a271
DS		 2601static int link_enumerate_ipv6_tentative_addresses(Link *link) {
2602 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
2603 sd_netlink_message *addr;
2604 int r;
2605
2606 assert(link);
2607 assert(link->manager);
2608 assert(link->manager->rtnl);
2609
2610 r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_GETADDR, 0, AF_INET6);
2611 if (r < 0)
2612 return r;
2613
2614 r = sd_netlink_call(link->manager->rtnl, req, 0, &reply);
2615 if (r < 0)
2616 return r;
2617
2618 for (addr = reply; addr; addr = sd_netlink_message_next(addr)) {
2619 unsigned char flags;
2620 int ifindex;
2621
2622 r = sd_rtnl_message_addr_get_ifindex(addr, &ifindex);
2623 if (r < 0) {
2624 log_link_warning_errno(link, r, "rtnl: invalid ifindex, ignoring: %m");
2625 continue;
2626 } else if (link->ifindex != ifindex)
2627 continue;
2628
2629 r = sd_rtnl_message_addr_get_flags(addr, &flags);
2630 if (r < 0) {
2631 log_link_warning_errno(link, r, "rtnl: received address message with invalid flags, ignoring: %m");
2632 continue;
2633 } else if (!(flags & IFA_F_TENTATIVE))
2634 continue;
2635
2636 log_link_debug(link, "Found tentative ipv6 link-local address");
2637 (void) manager_rtnl_process_address(link->manager->rtnl, addr, link->manager);
2638 }
2639
2640 return 0;
2641}
2642
5e5b137a
TG		 2643static int link_drop_foreign_config(Link *link) {
2644 Address *address;
d1bdafd2 2645 Neighbor *neighbor;
5e5b137a
TG		 2646 Route *route;
2647 Iterator i;
2648 int r;
2649
0917a271
DS		 2650 /* The kernel doesn't notify us about tentative addresses;
2651 * so if ipv6ll is disabled, we need to enumerate them now so we can drop them below */
2652 if (!link_ipv6ll_enabled(link)) {
2653 r = link_enumerate_ipv6_tentative_addresses(link);
2654 if (r < 0)
2655 return r;
2656 }
2657
5e5b137a 2658 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2659 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2660 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
5e5b137a
TG		 2661 continue;
2662
db51778f 2663 if (link_address_is_dynamic(link, address)) {
b1b0b42e 2664 if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
db51778f 2665 continue;
b1b0b42e 2666 } else if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
db51778f
YW		 2667 continue;
2668
30226d27
TJ		 2669 if (link_is_static_address_configured(link, address)) {
2670 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2671 if (r < 0)
2672 return log_link_error_errno(link, r, "Failed to add address: %m");
2673 } else {
63ae0569 2674 r = address_remove(address, link, NULL);
30226d27
TJ		 2675 if (r < 0)
2676 return r;
2677 }
5e5b137a
TG		 2678 }
2679
d1bdafd2
WKI		 2680 SET_FOREACH(neighbor, link->neighbors_foreign, i) {
2681 if (link_is_neighbor_configured(link, neighbor)) {
2682 r = neighbor_add(link, neighbor->family, &neighbor->in_addr, &neighbor->lladdr, neighbor->lladdr_size, NULL);
2683 if (r < 0)
2684 return r;
2685 } else {
2686 r = neighbor_remove(neighbor, link, NULL);
2687 if (r < 0)
2688 return r;
2689 }
2690 }
2691
5e5b137a 2692 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2693 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2694 if (route->protocol == RTPROT_KERNEL)
2695 continue;
2696
bd7d6cec
YW		 2697 /* do not touch multicast route added by kernel */
2698 /* FIXME: Why the kernel adds this route with protocol RTPROT_BOOT??? We need to investigate that.
2699 * https://tools.ietf.org/html/rfc4862#section-5.4 may explain why. */
2700 if (route->protocol == RTPROT_BOOT &&
2701 route->family == AF_INET6 &&
2702 route->dst_prefixlen == 8 &&
2703 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 }}} }))
2704 continue;
2705
b1b0b42e 2706 if (route->protocol == RTPROT_STATIC && link->network &&
db51778f
YW		 2707 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2708 continue;
2709
b1b0b42e 2710 if (route->protocol == RTPROT_DHCP && link->network &&
db51778f
YW		 2711 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2712 continue;
2713
7ecf0c3e 2714 if (link_is_static_route_configured(link, route)) {
f1368755 2715 r = route_add(link, route, NULL);
7ecf0c3e
TJ		 2716 if (r < 0)
2717 return r;
2718 } else {
4645ad47 2719 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2720 if (r < 0)
2721 return r;
2722 }
5e5b137a
TG		 2723 }
2724
2725 return 0;
2726}
2727
3104883d 2728static int link_drop_config(Link *link) {
410a7f15 2729 Address *address, *pool_address;
d1bdafd2 2730 Neighbor *neighbor;
3104883d
SS		 2731 Route *route;
2732 Iterator i;
2733 int r;
2734
2735 SET_FOREACH(address, link->addresses, i) {
2736 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2737 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
3104883d
SS		 2738 continue;
2739
63ae0569 2740 r = address_remove(address, link, NULL);
3104883d
SS		 2741 if (r < 0)
2742 return r;
410a7f15
RM		 2743
2744 /* If this address came from an address pool, clean up the pool */
2745 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2746 if (address_equal(address, pool_address)) {
2747 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2748 address_free(pool_address);
2749 break;
2750 }
2751 }
3104883d
SS		 2752 }
2753
d1bdafd2
WKI		 2754 SET_FOREACH(neighbor, link->neighbors, i) {
2755 r = neighbor_remove(neighbor, link, NULL);
2756 if (r < 0)
2757 return r;
2758 }
2759
3104883d
SS		 2760 SET_FOREACH(route, link->routes, i) {
2761 /* do not touch routes managed by the kernel */
2762 if (route->protocol == RTPROT_KERNEL)
2763 continue;
2764
4645ad47 2765 r = route_remove(route, link, NULL);
3104883d
SS		 2766 if (r < 0)
2767 return r;
2768 }
2769
c69305ff
LP		 2770 ndisc_flush(link);
2771
3104883d
SS		 2772 return 0;
2773}
2774
051e77ca
SS		 2775static int link_configure_ipv4_dad(Link *link) {
2776 Address *address;
2777 int r;
2778
2779 assert(link);
2780 assert(link->network);
2781
2782 LIST_FOREACH(addresses, address, link->network->static_addresses)
2783 if (address->family == AF_INET &&
2784 FLAGS_SET(address->duplicate_address_detection, ADDRESS_FAMILY_IPV4)) {
2785 r = configure_ipv4_duplicate_address_detection(link, address);
2786 if (r < 0)
2787 return log_link_error_errno(link, r, "Failed to configure IPv4ACD: %m");
2788 }
2789
2790 return 0;
2791}
2792
34658df2
YW		 2793static int link_configure_traffic_control(Link *link) {
2794 TrafficControl *tc;
0f5bd7fe 2795 Iterator i;
02b59d57
TG		 2796 int r;
2797
34658df2
YW		 2798 link->tc_configured = false;
2799 link->tc_messages = 0;
4ecdcb07 2800
34658df2
YW		 2801 ORDERED_HASHMAP_FOREACH(tc, link->network->tc_by_section, i) {
2802 r = traffic_control_configure(link, tc);
4ecdcb07
YW		 2803 if (r < 0)
2804 return r;
2805 }
2806
34658df2
YW		 2807 if (link->tc_messages == 0)
2808 link->tc_configured = true;
4ecdcb07 2809 else
34658df2 2810 log_link_debug(link, "Configuring traffic control");
4ecdcb07
YW		 2811
2812 return 0;
2813}
2814
2815static int link_configure(Link *link) {
2816 int r;
2817
ef1ba606 2818 assert(link);
b22d8a00 2819 assert(link->network);
bd08ce56 2820 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2821
34658df2 2822 r = link_configure_traffic_control(link);
4ecdcb07
YW		 2823 if (r < 0)
2824 return r;
2825
500b96eb 2826 if (link->iftype == ARPHRD_CAN)
93ea7750 2827 return link_configure_can(link);
92c918b0 2828
482efedc
SS		 2829 /* If IPv6 configured that is static IPv6 address and IPv6LL autoconfiguration is enabled
2830 * for this interface, then enable IPv6 */
57ad7607 2831 (void) link_update_ipv6_sysctl(link);
482efedc 2832
23d8b221
SS		 2833 r = link_set_proxy_arp(link);
2834 if (r < 0)
2835 return r;
2836
a0e5c15d
FK		 2837 r = ipv6_proxy_ndp_addresses_configure(link);
2838 if (r < 0)
2839 return r;
2840
769d324c
LP		 2841 r = link_set_ipv4_forward(link);
2842 if (r < 0)
2843 return r;
2844
2845 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2846 if (r < 0)
2847 return r;
2848
49092e22
SS		 2849 r = link_set_ipv6_privacy_extensions(link);
2850 if (r < 0)
2851 return r;
2852
4f2e437a
SS		 2853 r = link_set_ipv6_accept_ra(link);
2854 if (r < 0)
2855 return r;
2856
8749cbcd
SS		 2857 r = link_set_ipv6_dad_transmits(link);
2858 if (r < 0)
2859 return r;
b69c3180
SS		 2860
2861 r = link_set_ipv6_hop_limit(link);
2862 if (r < 0)
2863 return r;
8749cbcd 2864
99d2baa2
SS		 2865 r = link_set_flags(link);
2866 if (r < 0)
2867 return r;
2868
89fe6535
SS		 2869 r = link_set_group(link);
2870 if (r < 0)
2871 return r;
2872
910feb78 2873 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
b22d8a00 2874 r = ipv4ll_configure(link);
eb34d4af
TG		 2875 if (r < 0)
2876 return r;
2877 }
2878
78c958f8 2879 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2880 r = dhcp4_set_promote_secondaries(link);
2881 if (r < 0)
2882 return r;
2883
3c9b8860 2884 r = dhcp4_configure(link);
eb34d4af
TG		 2885 if (r < 0)
2886 return r;
eb34d4af
TG		 2887 }
2888
78c958f8 2889 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2890 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2891 if (r < 0)
2892 return r;
2893
2894 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2895 if (r < 0)
2896 return r;
dd43110f
TG		 2897 }
2898
62379e88
TG		 2899 if (link_dhcp6_enabled(link) ||
2900 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2901 r = dhcp6_configure(link);
2902 if (r < 0)
2903 return r;
2904 }
2905
2906 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2907 r = ndisc_configure(link);
4138fb2c
PF		 2908 if (r < 0)
2909 return r;
2910 }
2911
7465dd22
PF		 2912 if (link_radv_enabled(link)) {
2913 r = radv_configure(link);
2914 if (r < 0)
2915 return r;
2916 }
2917
8e1ad1ea 2918 if (link_lldp_rx_enabled(link)) {
7f853950 2919 r = link_lldp_rx_configure(link);
273eec24
LP		 2920 if (r < 0)
2921 return r;
ce43e484
SS		 2922 }
2923
f6fcc1c2 2924 r = link_configure_mtu(link);
40288ece
YW		 2925 if (r < 0)
2926 return r;
44b598a1 2927
9f6e82e6
YW		 2928 r = link_configure_addrgen_mode(link);
2929 if (r < 0)
2930 return r;
0e2fdb83 2931
051e77ca
SS		 2932 r = link_configure_ipv4_dad(link);
2933 if (r < 0)
2934 return r;
2935
3a390124
DS		 2936 return link_configure_continue(link);
2937}
2938
2939/* The configuration continues in this separate function, instead of
2940 * including this in the above link_configure() function, for two
2941 * reasons:
2942 * 1) some devices reset the link when the mtu is set, which caused
2943 * an infinite loop here in networkd; see:
2944 * https://github.com/systemd/systemd/issues/6593
2945 * https://github.com/systemd/systemd/issues/9831
2946 * 2) if ipv6ll is disabled, then bringing the interface up must be
2947 * delayed until after we get confirmation from the kernel that
2948 * the addr_gen_mode parameter has been set (via netlink), see:
2949 * https://github.com/systemd/systemd/issues/13882
2950 */
2951static int link_configure_continue(Link *link) {
55dc8c4a
YW		 2952 int r;
2953
2954 assert(link);
2955 assert(link->network);
bd08ce56 2956 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a 2957
9524014e 2958 if (link->setting_mtu || link->setting_genmode)
55dc8c4a
YW		 2959 return 0;
2960
4c649652
DS		 2961 /* Drop foreign config, but ignore loopback or critical devices.
2962 * We do not want to remove loopback address or addresses used for root NFS. */
2963 if (!(link->flags & IFF_LOOPBACK) &&
2964 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
2965 r = link_drop_foreign_config(link);
2966 if (r < 0)
2967 return r;
2968 }
2969
d236718c
DS		 2970 /* The kernel resets ipv6 mtu after changing device mtu;
2971 * we must set this here, after we've set device mtu */
2972 r = link_set_ipv6_mtu(link);
2973 if (r < 0)
2974 return r;
2975
dad2d78e 2976 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2977 r = link_acquire_conf(link);
2978 if (r < 0)
2979 return r;
cc544d5f 2980 }
1e9be60b 2981
3f265037 2982 return link_enter_join_netdev(link);
505f8da7
TG		 2983}
2984
27dfc982
YW		 2985static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2986 assert(duid);
2987
2988 if (duid->raw_data_len > 0)
2989 return 0;
2990
2991 if (duid->type != DUID_TYPE_UUID)
2992 return -EINVAL;
2993
2994 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2995 duid->raw_data_len = sizeof(sd_id128_t);
2996
2997 return 1;
2998}
2999
3000int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
3001 Manager *manager = userdata;
3002 const sd_bus_error *e;
3003 const void *a;
3004 size_t sz;
3005 DUID *duid;
3006 Link *link;
3007 int r;
3008
3009 assert(m);
3010 assert(manager);
3011
3012 e = sd_bus_message_get_error(m);
3013 if (e) {
3014 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 3015 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 3016 e->message);
3017 goto configure;
3018 }
3019
3020 r = sd_bus_message_read_array(m, 'y', &a, &sz);
3021 if (r < 0)
3022 goto configure;
3023
3024 if (sz != sizeof(sd_id128_t)) {
ab4dd984 3025 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 3026 goto configure;
3027 }
3028
3029 memcpy(&manager->product_uuid, a, sz);
3030 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
3031 (void) duid_set_uuid(duid, manager->product_uuid);
3032
3033 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
3034
3035configure:
3036 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3dc2e7af
YW		 3037 link_unref(link);
3038
27dfc982
YW		 3039 r = link_configure(link);
3040 if (r < 0)
4ff296b0 3041 link_enter_failed(link);
27dfc982
YW		 3042 }
3043
3044 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
3045
3046 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
3047 * even if the method fails. */
3048 manager->has_product_uuid = true;
3049
3050 return 1;
3051}
3052
3053static bool link_requires_uuid(Link *link) {
3054 const DUID *duid;
3055
3056 assert(link);
3057 assert(link->manager);
3058 assert(link->network);
3059
3060 duid = link_get_duid(link);
3061 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
3062 return false;
3063
3064 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
3065 return true;
3066
3067 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
3068 return true;
3069
3070 return false;
3071}
3072
3073static int link_configure_duid(Link *link) {
3074 Manager *m;
3075 DUID *duid;
3076 int r;
3077
3078 assert(link);
3079 assert(link->manager);
3080 assert(link->network);
3081
3082 m = link->manager;
3083 duid = link_get_duid(link);
3084
3085 if (!link_requires_uuid(link))
3086 return 1;
3087
3088 if (m->has_product_uuid) {
3089 (void) duid_set_uuid(duid, m->product_uuid);
3090 return 1;
3091 }
3092
3093 if (!m->links_requesting_uuid) {
3094 r = manager_request_product_uuid(m, link);
3095 if (r < 0) {
3096 if (r == -ENOMEM)
3097 return r;
3098
ab4dd984
ZJS		 3099 log_link_warning_errno(link, r,
3100 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 3101 return 1;
3102 }
3103 } else {
3104 r = set_put(m->links_requesting_uuid, link);
3105 if (r < 0)
3106 return log_oom();
3107
3108 r = set_put(m->duids_requesting_uuid, duid);
3109 if (r < 0)
3110 return log_oom();
3dc2e7af
YW		 3111
3112 link_ref(link);
27dfc982
YW		 3113 }
3114
3115 return 0;
3116}
3117
572b21d9 3118static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
ad932b15
YW		 3119 Network *network;
3120 int r;
3121
572b21d9
YW		 3122 if (m) {
3123 _cleanup_strv_free_ char **s = NULL;
3124
3125 r = sd_netlink_message_get_errno(m);
3126 if (r < 0)
3127 return r;
3128
3129 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3130 if (r < 0 && r != -ENODATA)
3131 return r;
3132
3133 strv_free_and_replace(link->alternative_names, s);
3134 }
3135
ef62949a 3136 r = network_get(link->manager, link->iftype, link->sd_device, link->ifname, link->alternative_names,
4bb7cc82 3137 &link->mac, &link->permanent_mac, link->wlan_iftype, link->ssid, &link->bssid, &network);
ad932b15
YW		 3138 if (r == -ENOENT) {
3139 link_enter_unmanaged(link);
3140 return 0;
3141 } else if (r == 0 && network->unmanaged) {
3142 link_enter_unmanaged(link);
3143 return 0;
3144 } else if (r < 0)
3145 return r;
3146
99b8517c 3147 if (link->network == network && !force)
ad932b15
YW		 3148 return 0;
3149
3150 log_link_info(link, "Re-configuring with %s", network->filename);
3151
3152 /* Dropping old .network file */
3153 r = link_stop_clients(link, false);
572b21d9 3154 if (r < 0)
ad932b15 3155 return r;
ad932b15
YW		 3156
3157 if (link_dhcp4_server_enabled(link))
3158 (void) sd_dhcp_server_stop(link->dhcp_server);
3159
3160 r = link_drop_config(link);
3161 if (r < 0)
3162 return r;
3163
2c7b826d 3164 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
ad932b15
YW		 3165 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
3166 r = link_drop_foreign_config(link);
3167 if (r < 0)
3168 return r;
3169 }
3170
3171 link_free_carrier_maps(link);
3172 link_free_engines(link);
3173 link->network = network_unref(link->network);
3174
3175 /* Then, apply new .network file */
3176 r = network_apply(network, link);
3177 if (r < 0)
3178 return r;
3179
3180 r = link_new_carrier_maps(link);
3181 if (r < 0)
3182 return r;
3183
3184 link_set_state(link, LINK_STATE_INITIALIZED);
8ae7b8a1 3185 link_dirty(link);
ad932b15
YW		 3186
3187 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3188 * link_configure() is called later asynchronously. */
3189 r = link_configure_duid(link);
3190 if (r <= 0)
3191 return r;
3192
3193 r = link_configure(link);
3194 if (r < 0)
3195 return r;
3196
3197 return 0;
3198}
3199
572b21d9
YW		 3200static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3201 int r;
3202
3203 r = link_reconfigure_internal(link, m, false);
3204 if (r < 0)
3205 link_enter_failed(link);
3206
3207 return 1;
3208}
3209
3210static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3211 int r;
3212
3213 r = link_reconfigure_internal(link, m, true);
3214 if (r < 0)
3215 link_enter_failed(link);
3216
3217 return 1;
3218}
3219
3220int link_reconfigure(Link *link, bool force) {
3221 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
3222 int r;
3223
2c0d7ed3
YW		 3224 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
3225 return 0;
3226
572b21d9
YW		 3227 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3228 link->ifindex);
3229 if (r < 0)
3230 return r;
3231
3232 r = netlink_call_async(link->manager->rtnl, NULL, req,
3233 force ? link_force_reconfigure_handler : link_reconfigure_handler,
3234 link_netlink_destroy_callback, link);
3235 if (r < 0)
3236 return r;
3237
3238 link_ref(link);
3239
3240 return 0;
3241}
3242
e6bf7774 3243static int link_initialized_and_synced(Link *link) {
505f8da7 3244 Network *network;
505f8da7
TG		 3245 int r;
3246
3247 assert(link);
3248 assert(link->ifname);
3249 assert(link->manager);
3250
bd08ce56
YW		 3251 /* We may get called either from the asynchronous netlink callback,
3252 * or directly for link_add() if running in a container. See link_add(). */
3253 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 3254 return 0;
505f8da7 3255
6a7a4e4d 3256 log_link_debug(link, "Link state is up-to-date");
bd08ce56 3257 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 3258
0d4ad91d
AR		 3259 r = link_new_bound_by_list(link);
3260 if (r < 0)
3261 return r;
3262
3263 r = link_handle_bound_by_list(link);
3264 if (r < 0)
3265 return r;
3266
c4a03a56 3267 if (!link->network) {
0894cfe4 3268 r = wifi_get_info(link);
8d968fdd
YW		 3269 if (r < 0)
3270 return r;
3271
ef62949a 3272 r = network_get(link->manager, link->iftype, link->sd_device, link->ifname, link->alternative_names,
4bb7cc82 3273 &link->mac, &link->permanent_mac, link->wlan_iftype, link->ssid, &link->bssid, &network);
c4a03a56
TG		 3274 if (r == -ENOENT) {
3275 link_enter_unmanaged(link);
4232cf04 3276 return 0;
a09dc546
DM		 3277 } else if (r == 0 && network->unmanaged) {
3278 link_enter_unmanaged(link);
3279 return 0;
c4a03a56
TG		 3280 } else if (r < 0)
3281 return r;
505f8da7 3282
c4a03a56
TG		 3283 if (link->flags & IFF_LOOPBACK) {
3284 if (network->link_local != ADDRESS_FAMILY_NO)
3285 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3286
c4a03a56
TG		 3287 if (network->dhcp != ADDRESS_FAMILY_NO)
3288 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3289
c4a03a56
TG		 3290 if (network->dhcp_server)
3291 log_link_debug(link, "Ignoring DHCP server for loopback link");
3292 }
bd2efe92 3293
7d342c03 3294 r = network_apply(network, link);
c4a03a56
TG		 3295 if (r < 0)
3296 return r;
3297 }
505f8da7 3298
0d4ad91d
AR		 3299 r = link_new_bound_to_list(link);
3300 if (r < 0)
3301 return r;
3302
27dfc982
YW		 3303 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3304 * link_configure() is called later asynchronously. */
3305 r = link_configure_duid(link);
3306 if (r <= 0)
3307 return r;
3308
a748b692
TG		 3309 r = link_configure(link);
3310 if (r < 0)
3311 return r;
3312
4232cf04 3313 return 0;
505f8da7
TG		 3314}
3315
302a796f 3316static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
572b21d9 3317 _cleanup_strv_free_ char **s = NULL;
4ff296b0
YW		 3318 int r;
3319
572b21d9
YW		 3320 r = sd_netlink_message_get_errno(m);
3321 if (r < 0) {
40681e5c 3322 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 3323 link_enter_failed(link);
3324 return 0;
3325 }
3326
3327 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3328 if (r < 0 && r != -ENODATA) {
3329 link_enter_failed(link);
3330 return 0;
3331 }
3332
3333 strv_free_and_replace(link->alternative_names, s);
3334
4ff296b0
YW		 3335 r = link_initialized_and_synced(link);
3336 if (r < 0)
3337 link_enter_failed(link);
e6bf7774
YW		 3338 return 1;
3339}
3340
51517f9e 3341int link_initialized(Link *link, sd_device *device) {
4afd3348 3342 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3343 int r;
3344
3345 assert(link);
3346 assert(link->manager);
3347 assert(link->manager->rtnl);
3348 assert(device);
3349
8434fd5c 3350 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3351 return 0;
3352
51517f9e 3353 if (link->sd_device)
679b3605
TG		 3354 return 0;
3355
79008bdd 3356 log_link_debug(link, "udev initialized link");
bd08ce56 3357 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 3358
51517f9e 3359 link->sd_device = sd_device_ref(device);
4f561e8e 3360
3c9b8860
TG		 3361 /* udev has initialized the link, but we don't know if we have yet
3362 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3363 * when it returns we know that the pending NEWLINKs have already been
3364 * processed and that we are up-to-date */
4f561e8e 3365
3c9b8860
TG		 3366 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3367 link->ifindex);
4f561e8e
TG		 3368 if (r < 0)
3369 return r;
3370
302a796f
YW		 3371 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3372 link_netlink_destroy_callback, link);
4f561e8e
TG		 3373 if (r < 0)
3374 return r;
3375
5da8149f
TG		 3376 link_ref(link);
3377
4f561e8e
TG		 3378 return 0;
3379}
3380
c4a03a56 3381static int link_load(Link *link) {
0bc70f1d
TG		 3382 _cleanup_free_ char *network_file = NULL,
3383 *addresses = NULL,
f703cc2c 3384 *routes = NULL,
0bc70f1d
TG		 3385 *dhcp4_address = NULL,
3386 *ipv4ll_address = NULL;
3387 union in_addr_union address;
c598ac76 3388 const char *p;
c4a03a56
TG		 3389 int r;
3390
3391 assert(link);
3392
aa8fbc74 3393 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3394 "NETWORK_FILE", &network_file,
3395 "ADDRESSES", &addresses,
f703cc2c 3396 "ROUTES", &routes,
0bc70f1d 3397 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3398 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3399 if (r < 0 && r != -ENOENT)
3400 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3401
3402 if (network_file) {
3403 Network *network;
3404 char *suffix;
3405
3406 /* drop suffix */
3407 suffix = strrchr(network_file, '.');
3408 if (!suffix) {
3409 log_link_debug(link, "Failed to get network name from %s", network_file);
3410 goto network_file_fail;
3411 }
3412 *suffix = '\0';
3413
3414 r = network_get_by_name(link->manager, basename(network_file), &network);
3415 if (r < 0) {
3416 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3417 goto network_file_fail;
3418 }
3419
7d342c03 3420 r = network_apply(network, link);
c4a03a56
TG		 3421 if (r < 0)
3422 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3423 }
3424
3425network_file_fail:
3426
3427 if (addresses) {
c598ac76 3428 p = addresses;
c4a03a56 3429
c598ac76
TG		 3430 for (;;) {
3431 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3432 char *prefixlen_str;
3433 int family;
3434 unsigned char prefixlen;
c4a03a56 3435
c598ac76
TG		 3436 r = extract_first_word(&p, &address_str, NULL, 0);
3437 if (r < 0) {
3438 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3439 continue;
928bc597
TA		 3440 }
3441 if (r == 0)
c598ac76
TG		 3442 break;
3443
3444 prefixlen_str = strchr(address_str, '/');
c4a03a56 3445 if (!prefixlen_str) {
c598ac76 3446 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3447 continue;
3448 }
3449
313cefa1 3450 *prefixlen_str++ = '\0';
c4a03a56
TG		 3451
3452 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3453 if (r != 1) {
3454 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3455 continue;
3456 }
3457
c598ac76 3458 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3459 if (r < 0) {
c598ac76 3460 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3461 continue;
3462 }
3463
3464 r = address_add(link, family, &address, prefixlen, NULL);
3465 if (r < 0)
3466 return log_link_error_errno(link, r, "Failed to add address: %m");
3467 }
3468 }
3469
f703cc2c 3470 if (routes) {
74544b4e
TA		 3471 p = routes;
3472
c598ac76 3473 for (;;) {
4afd3348 3474 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f1368755
YW		 3475 _cleanup_(route_freep) Route *tmp = NULL;
3476 _cleanup_free_ char *route_str = NULL;
f703cc2c 3477 char *prefixlen_str;
f1368755 3478 Route *route;
f703cc2c 3479
c598ac76
TG		 3480 r = extract_first_word(&p, &route_str, NULL, 0);
3481 if (r < 0) {
3482 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3483 continue;
928bc597
TA		 3484 }
3485 if (r == 0)
c598ac76
TG		 3486 break;
3487
3488 prefixlen_str = strchr(route_str, '/');
f703cc2c 3489 if (!prefixlen_str) {
c598ac76 3490 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3491 continue;
3492 }
3493
313cefa1 3494 *prefixlen_str++ = '\0';
f703cc2c 3495
f1368755
YW		 3496 r = route_new(&tmp);
3497 if (r < 0)
3498 return log_oom();
3499
3500 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%"PRIu32"/"USEC_FMT, &tmp->dst_prefixlen, &tmp->tos, &tmp->priority, &tmp->table, &tmp->lifetime);
f833694d
TG		 3501 if (r != 5) {
3502 log_link_debug(link,
3503 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3504 prefixlen_str);
f703cc2c
TG		 3505 continue;
3506 }
3507
f1368755 3508 r = in_addr_from_string_auto(route_str, &tmp->family, &tmp->dst);
f703cc2c 3509 if (r < 0) {
c598ac76 3510 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3511 continue;
3512 }
3513
f1368755 3514 r = route_add(link, tmp, &route);
f703cc2c
TG		 3515 if (r < 0)
3516 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3517
f1368755
YW		 3518 if (route->lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
3519 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), route->lifetime,
f833694d
TG		 3520 0, route_expire_handler, route);
3521 if (r < 0)
3522 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3523 }
3524
f833694d 3525 sd_event_source_unref(route->expire);
1cc6c93a 3526 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3527 }
3528 }
3529
0bc70f1d
TG		 3530 if (dhcp4_address) {
3531 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3532 if (r < 0) {
b68d26b8 3533 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3534 goto dhcp4_address_fail;
3535 }
3536
b1c626f6 3537 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3538 if (r < 0)
b68d26b8 3539 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d 3540
1b43e246
DS		 3541 r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0);
3542 if (r < 0)
3543 return log_link_error_errno(link, r, "Failed to attach DHCPv4 event: %m");
3544
0bc70f1d
TG		 3545 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3546 if (r < 0)
b68d26b8 3547 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3548 }
3549
3550dhcp4_address_fail:
3551
3552 if (ipv4ll_address) {
3553 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3554 if (r < 0) {
b68d26b8 3555 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3556 goto ipv4ll_address_fail;
3557 }
3558
3559 r = sd_ipv4ll_new(&link->ipv4ll);
3560 if (r < 0)
b68d26b8 3561 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d 3562
1b43e246
DS		 3563 r = sd_ipv4ll_attach_event(link->ipv4ll, NULL, 0);
3564 if (r < 0)
3565 return log_link_error_errno(link, r, "Failed to attach IPv4LL event: %m");
3566
0bc70f1d
TG		 3567 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3568 if (r < 0)
b68d26b8 3569 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3570 }
3571
3572ipv4ll_address_fail:
3573
c4a03a56
TG		 3574 return 0;
3575}
3576
1c4baffc 3577int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3578 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3579 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3580 Link *link;
5a937ea2 3581 int r;
505f8da7
TG		 3582
3583 assert(m);
fbbeb65a 3584 assert(m->rtnl);
505f8da7
TG		 3585 assert(message);
3586 assert(ret);
3587
3588 r = link_new(m, message, ret);
3589 if (r < 0)
3590 return r;
3591
3592 link = *ret;
3593
6a7a4e4d 3594 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3595
c4a03a56
TG		 3596 r = link_load(link);
3597 if (r < 0)
3598 return r;
3599
bf331d87
YW		 3600 if (path_is_read_only_fs("/sys") <= 0) {
3601 /* udev should be around */
ae06ab10 3602 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3603 r = sd_device_new_from_device_id(&device, ifindex_str);
3604 if (r < 0) {
4d59e14f
YW		 3605 log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m");
3606 return 0;
5c416fc4 3607 }
505f8da7 3608
5a937ea2 3609 r = sd_device_get_is_initialized(device);
51517f9e 3610 if (r < 0) {
bf331d87 3611 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 3612 goto failed;
3613 }
5a937ea2 3614 if (r == 0) {
505f8da7 3615 /* not yet ready */
79008bdd 3616 log_link_debug(link, "link pending udev initialization...");
505f8da7 3617 return 0;
3c4cb064 3618 }
505f8da7 3619
299ad32d
YW		 3620 r = device_is_renaming(device);
3621 if (r < 0) {
bf331d87 3622 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 3623 goto failed;
3624 }
3625 if (r > 0) {
bf331d87 3626 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 3627 return 0;
3628 }
3629
4f561e8e
TG		 3630 r = link_initialized(link, device);
3631 if (r < 0)
5c416fc4 3632 goto failed;
4f561e8e 3633 } else {
e6bf7774 3634 r = link_initialized_and_synced(link);
4f561e8e 3635 if (r < 0)
5c416fc4 3636 goto failed;
4f561e8e 3637 }
505f8da7 3638
a748b692 3639 return 0;
5c416fc4
TG		 3640failed:
3641 link_enter_failed(link);
3642 return r;
a748b692
TG		 3643}
3644
c601ebf7 3645int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3646 int r;
3647
3648 assert(link);
3649
3650 log_link_info(link, "Gained IPv6LL");
3651
c601ebf7 3652 link->ipv6ll_address = *address;
e7ab854c
TG		 3653 link_check_ready(link);
3654
b9ea3d2e 3655 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3656 r = link_acquire_ipv6_conf(link);
3657 if (r < 0) {
3658 link_enter_failed(link);
3659 return r;
3660 }
3661 }
3662
3663 return 0;
3664}
3665
9c0a72f9
TG		 3666static int link_carrier_gained(Link *link) {
3667 int r;
3668
3669 assert(link);
3670
0894cfe4 3671 r = wifi_get_info(link);
8d968fdd
YW		 3672 if (r < 0)
3673 return r;
3674 if (r > 0) {
572b21d9
YW		 3675 r = link_reconfigure_internal(link, NULL, false);
3676 if (r < 0) {
3677 link_enter_failed(link);
8d968fdd 3678 return r;
572b21d9 3679 }
8d968fdd
YW		 3680 }
3681
b9ea3d2e 3682 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3683 r = link_acquire_conf(link);
3684 if (r < 0) {
3685 link_enter_failed(link);
3686 return r;
3687 }
6fc25497 3688
b425c3ae 3689 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 3690 r = link_request_set_addresses(link);
6fc25497
SS		 3691 if (r < 0)
3692 return r;
9c0a72f9
TG		 3693 }
3694
0d4ad91d
AR		 3695 r = link_handle_bound_by_list(link);
3696 if (r < 0)
3697 return r;
3698
9c0a72f9
TG		 3699 return 0;
3700}
3701
3702static int link_carrier_lost(Link *link) {
3703 int r;
3704
3705 assert(link);
3706
25e992ba 3707 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3708 return 0;
3709
fbdb6605 3710 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3711 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3712 * configuration and stop the clients as well. */
97e7fb39
SS		 3713 if (link->setting_mtu)
3714 return 0;
3715
95355a28 3716 r = link_stop_clients(link, false);
9c0a72f9
TG		 3717 if (r < 0) {
3718 link_enter_failed(link);
3719 return r;
3720 }
3721
28464ae0
SS		 3722 if (link_dhcp4_server_enabled(link))
3723 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3724
3104883d
SS		 3725 r = link_drop_config(link);
3726 if (r < 0)
3727 return r;
3728
2c7b826d 3729 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
f258e948 3730 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3731 r = link_drop_foreign_config(link);
3732 if (r < 0)
3733 return r;
3734 }
3104883d 3735
0d4ad91d
AR		 3736 r = link_handle_bound_by_list(link);
3737 if (r < 0)
3738 return r;
3739
9c0a72f9
TG		 3740 return 0;
3741}
3742
3743int link_carrier_reset(Link *link) {
3744 int r;
3745
3746 assert(link);
3747
3748 if (link_has_carrier(link)) {
3749 r = link_carrier_lost(link);
3750 if (r < 0)
3751 return r;
3752
3753 r = link_carrier_gained(link);
3754 if (r < 0)
3755 return r;
3756
6a7a4e4d 3757 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3758 }
3759
3760 return 0;
3761}
3762
d236718c
DS		 3763/* This is called every time an interface admin state changes to up;
3764 * specifically, when IFF_UP flag changes from unset to set */
3765static int link_admin_state_up(Link *link) {
3766 int r;
3767
3768 /* We set the ipv6 mtu after the device mtu, but the kernel resets
3769 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
3770 * ipv6_mtu_set prevents this from trying to set it too early before
3771 * the link->network has been setup; we only need to reset it
3772 * here if we've already set it during normal initialization. */
3773 if (link->ipv6_mtu_set) {
3774 r = link_set_ipv6_mtu(link);
3775 if (r < 0)
3776 return r;
3777 }
3778
3779 return 0;
3780}
3781
1c4baffc 3782int link_update(Link *link, sd_netlink_message *m) {
572b21d9 3783 _cleanup_strv_free_ char **s = NULL;
c49b33ac 3784 struct ether_addr mac;
ca4e095a 3785 const char *ifname;
afe7fd56 3786 uint32_t mtu;
d236718c 3787 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 3788 int old_master, r;
22936833 3789
dd3efc09 3790 assert(link);
b8941f74 3791 assert(link->ifname);
22936833
TG		 3792 assert(m);
3793
7619683b 3794 if (link->state == LINK_STATE_LINGER) {
5238e957 3795 log_link_info(link, "Link re-added");
289e6774 3796 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3797
3798 r = link_new_carrier_maps(link);
3799 if (r < 0)
3800 return r;
7619683b
TG		 3801 }
3802
1c4baffc 3803 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3804 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3805 Manager *manager = link->manager;
b8941f74 3806
30de2b89 3807 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3808
30de2b89
YW		 3809 link_drop(link);
3810 r = link_add(manager, m, &link);
3811 if (r < 0)
3812 return r;
b8941f74
TG		 3813 }
3814
572b21d9
YW		 3815 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3816 if (r >= 0)
3817 strv_free_and_replace(link->alternative_names, s);
3818
1c4baffc 3819 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3820 if (r >= 0 && mtu > 0) {
3821 link->mtu = mtu;
4e964aa0 3822 if (link->original_mtu == 0) {
afe7fd56 3823 link->original_mtu = mtu;
6a7a4e4d 3824 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3825 }
3826
3827 if (link->dhcp_client) {
3c9b8860
TG		 3828 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3829 link->mtu);
fc95c359
YW		 3830 if (r < 0)
3831 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3832 }
7465dd22
PF		 3833
3834 if (link->radv) {
3835 r = sd_radv_set_mtu(link->radv, link->mtu);
3836 if (r < 0)
3837 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3838 }
9842de0d 3839 }
69629de9 3840
e9189a1f
TG		 3841 /* The kernel may broadcast NEWLINK messages without the MAC address
3842 set, simply ignore them. */
1c4baffc 3843 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3844 if (r >= 0) {
3c9b8860
TG		 3845 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3846 ETH_ALEN)) {
c49b33ac 3847
3c9b8860
TG		 3848 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3849 ETH_ALEN);
c49b33ac 3850
79008bdd 3851 log_link_debug(link, "MAC address: "
20861203
TG		 3852 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3853 mac.ether_addr_octet[0],
3854 mac.ether_addr_octet[1],
3855 mac.ether_addr_octet[2],
3856 mac.ether_addr_octet[3],
3857 mac.ether_addr_octet[4],
3858 mac.ether_addr_octet[5]);
c49b33ac 3859
20861203
TG		 3860 if (link->ipv4ll) {
3861 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3862 if (r < 0)
3863 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3864 }
c49b33ac 3865
20861203 3866 if (link->dhcp_client) {
3c9b8860 3867 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3868 (const uint8_t *) &link->mac,
3869 sizeof (link->mac),
3870 ARPHRD_ETHER);
6a7a4e4d
LP		 3871 if (r < 0)
3872 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3873
fff1f40c
YW		 3874 r = dhcp4_set_client_identifier(link);
3875 if (r < 0)
3876 return r;
c49b33ac 3877 }
4138fb2c
PF		 3878
3879 if (link->dhcp6_client) {
f24648a6 3880 const DUID* duid = link_get_duid(link);
8341a5c3 3881
4138fb2c 3882 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3883 (const uint8_t *) &link->mac,
3884 sizeof (link->mac),
3885 ARPHRD_ETHER);
6a7a4e4d
LP		 3886 if (r < 0)
3887 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3888
8217ed5e
TH		 3889 if (link->network->iaid_set) {
3890 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3891 link->network->iaid);
3892 if (r < 0)
3893 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3894 }
413708d1 3895
8341a5c3
ZJS		 3896 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3897 duid->type,
3898 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3899 duid->raw_data_len);
413708d1
VK		 3900 if (r < 0)
3901 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3902 }
7465dd22
PF		 3903
3904 if (link->radv) {
3905 r = sd_radv_set_mac(link->radv, &link->mac);
3906 if (r < 0)
3907 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3908 }
420d2058
SS		 3909
3910 if (link->ndisc) {
3911 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3912 if (r < 0)
3913 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3914 }
c49b33ac 3915 }
4f882b2a
TG		 3916 }
3917
bb262ef0
YW		 3918 old_master = link->master_ifindex;
3919 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
3920
d236718c 3921 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 3922 had_carrier = link_has_carrier(link);
3923
bb262ef0 3924 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 3925 if (r < 0)
3926 return r;
3927
d236718c
DS		 3928 if (!link_was_admin_up && (link->flags & IFF_UP)) {
3929 log_link_info(link, "Link UP");
3930
3931 r = link_admin_state_up(link);
3932 if (r < 0)
3933 return r;
3934 } else if (link_was_admin_up && !(link->flags & IFF_UP))
3935 log_link_info(link, "Link DOWN");
3936
273eec24
LP		 3937 r = link_update_lldp(link);
3938 if (r < 0)
3939 return r;
3940
a61bb41c
TG		 3941 carrier_gained = !had_carrier && link_has_carrier(link);
3942 carrier_lost = had_carrier && !link_has_carrier(link);
3943
3944 if (carrier_gained) {
6a7a4e4d 3945 log_link_info(link, "Gained carrier");
a61bb41c 3946
9c0a72f9
TG		 3947 r = link_carrier_gained(link);
3948 if (r < 0)
3949 return r;
a61bb41c 3950 } else if (carrier_lost) {
6a7a4e4d 3951 log_link_info(link, "Lost carrier");
a61bb41c 3952
9c0a72f9
TG		 3953 r = link_carrier_lost(link);
3954 if (r < 0)
a61bb41c 3955 return r;
a61bb41c
TG		 3956 }
3957
3958 return 0;
dd3efc09 3959}
fe8db0c5 3960
b295beea
LP		 3961static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3962 bool space = false;
3963 Iterator i;
3964 Link *link;
3965
3966 assert(f);
3967 assert(prefix);
3968
3969 if (hashmap_isempty(h))
3970 return;
3971
0d536673 3972 fputs(prefix, f);
b295beea
LP		 3973 HASHMAP_FOREACH(link, h, i) {
3974 if (space)
0d536673 3975 fputc(' ', f);
b295beea
LP		 3976
3977 fprintf(f, "%i", link->ifindex);
3978 space = true;
3979 }
3980
0d536673 3981 fputc('\n', f);
b295beea
LP		 3982}
3983
15761549 3984static void link_save_dns(FILE *f, struct in_addr_data *dns, unsigned n_dns, bool *space) {
dddc8d1e 3985 for (unsigned j = 0; j < n_dns; j++) {
15761549 3986 _cleanup_free_ char *b = NULL;
dddc8d1e 3987 int r;
15761549
YW		 3988
3989 r = in_addr_to_string(dns[j].family, &dns[j].address, &b);
3990 if (r < 0) {
3991 log_debug_errno(r, "Failed to format address, ignoring: %m");
3992 continue;
3993 }
3994
3995 if (*space)
3996 fputc(' ', f);
3997 fputs(b, f);
3998 *space = true;
3999 }
4000}
4001
d5e172d2
ZJS		 4002static void serialize_addresses(
4003 FILE *f,
4004 const char *lvalue,
4005 bool *space,
4006 char **addresses,
4007 sd_dhcp_lease *lease,
4008 bool conditional,
4009 sd_dhcp_lease_info what,
4010 sd_dhcp6_lease *lease6,
4011 bool conditional6,
4012 int (*lease6_get_addr)(sd_dhcp6_lease*, const struct in6_addr**),
4013 int (*lease6_get_fqdn)(sd_dhcp6_lease*, char ***)) {
4014 int r;
4015
4016 bool _space = false;
4017 if (!space)
4018 space = &_space;
4019
4020 if (lvalue)
4021 fprintf(f, "%s=", lvalue);
4022 fputstrv(f, addresses, NULL, space);
4023
4024 if (lease && conditional) {
4025 const struct in_addr *lease_addresses;
4026
4027 r = sd_dhcp_lease_get_servers(lease, what, &lease_addresses);
4028 if (r > 0)
d8bff5cc 4029 serialize_in_addrs(f, lease_addresses, r, space, in4_addr_is_non_local);
d5e172d2
ZJS		 4030 }
4031
4032 if (lease6 && conditional6 && lease6_get_addr) {
4033 const struct in6_addr *in6_addrs;
4034
4035 r = lease6_get_addr(lease6, &in6_addrs);
d8bff5cc
ZJS		 4036 if (r > 0)
4037 serialize_in6_addrs(f, in6_addrs, r, space);
d5e172d2
ZJS		 4038 }
4039
4040 if (lease6 && conditional6 && lease6_get_fqdn) {
4041 char **in6_hosts;
4042
4043 r = lease6_get_fqdn(lease6, &in6_hosts);
4044 if (r > 0)
4045 fputstrv(f, in6_hosts, NULL, space);
4046 }
4047
4048 if (lvalue)
4049 fputc('\n', f);
4050}
4051
fe8db0c5 4052int link_save(Link *link) {
d361b373 4053 const char *admin_state, *oper_state, *carrier_state, *address_state;
68a8723c 4054 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 4055 _cleanup_fclose_ FILE *f = NULL;
e7780c8d 4056 Address *a;
c1eb9872 4057 Route *route;
e7780c8d 4058 Iterator i;
fe8db0c5
TG		 4059 int r;
4060
4061 assert(link);
4062 assert(link->state_file);
68a8723c 4063 assert(link->lease_file);
bbf7c048
TG		 4064 assert(link->manager);
4065
370e9930 4066 if (link->state == LINK_STATE_LINGER) {
6990fb6b 4067 (void) unlink(link->state_file);
370e9930
TG		 4068 return 0;
4069 }
4070
34437b4f
LP		 4071 link_lldp_save(link);
4072
deb2e523
TG		 4073 admin_state = link_state_to_string(link->state);
4074 assert(admin_state);
4075
e375dcde
TG		 4076 oper_state = link_operstate_to_string(link->operstate);
4077 assert(oper_state);
deb2e523 4078
ac999bf0
YW		 4079 carrier_state = link_carrier_state_to_string(link->carrier_state);
4080 assert(carrier_state);
4081
4082 address_state = link_address_state_to_string(link->address_state);
4083 assert(address_state);
4084
fe8db0c5
TG		 4085 r = fopen_temporary(link->state_file, &f, &temp_path);
4086 if (r < 0)
6a7a4e4d 4087 goto fail;
fe8db0c5 4088
5512a963 4089 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 4090
4091 fprintf(f,
4092 "# This is private data. Do not parse.\n"
deb2e523 4093 "ADMIN_STATE=%s\n"
ac999bf0
YW		 4094 "OPER_STATE=%s\n"
4095 "CARRIER_STATE=%s\n"
4096 "ADDRESS_STATE=%s\n",
4097 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 4098
bcb7a07e 4099 if (link->network) {
fe0e16db
YW		 4100 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
4101 const char *dhcp_domainname = NULL, *p;
07bdc70d 4102 sd_dhcp6_lease *dhcp6_lease = NULL;
fe0e16db 4103 bool space;
07bdc70d 4104
c1a38904
MTL		 4105 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
4106 yes_no(link->network->required_for_online));
4107
d5e172d2
ZJS		 4108 LinkOperationalStateRange st = link->network->required_operstate_for_online;
4109 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s%s%s\n",
4110 strempty(link_operstate_to_string(st.min)),
4111 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? ":" : "",
4112 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? strempty(link_operstate_to_string(st.max)) : "");
4ac77d63 4113
07bdc70d 4114 if (link->dhcp6_client) {
4058d339
TG		 4115 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
4116 if (r < 0 && r != -ENOMSG)
2206aa5c 4117 log_link_debug_errno(link, r, "Failed to get DHCPv6 lease: %m");
07bdc70d 4118 }
b0e39c82 4119
adc5b2e2
TG		 4120 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
4121
d5e172d2
ZJS		 4122 /************************************************************/
4123
0d536673 4124 fputs("DNS=", f);
ea352b40 4125 space = false;
15761549
YW		 4126 if (link->n_dns != (unsigned) -1)
4127 link_save_dns(f, link->dns, link->n_dns, &space);
4128 else
4129 link_save_dns(f, link->network->dns, link->network->n_dns, &space);
d5314fff 4130
d5e172d2
ZJS		 4131 serialize_addresses(f, NULL, &space,
4132 NULL,
4133 link->dhcp_lease,
4134 link->network->dhcp_use_dns,
4135 SD_DHCP_LEASE_DNS_SERVERS,
4136 dhcp6_lease,
4137 link->network->dhcp6_use_dns,
4138 sd_dhcp6_lease_get_dns,
4139 NULL);
1e7a0e21
LP		 4140
4141 /* Make sure to flush out old entries before we use the NDISC data */
4142 ndisc_vacuum(link);
4143
b296797f 4144 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 4145 NDiscRDNSS *dd;
4146
d8bff5cc
ZJS		 4147 SET_FOREACH(dd, link->ndisc_rdnss, i)
4148 serialize_in6_addrs(f, &dd->address, 1, &space);
b0e39c82
TG		 4149 }
4150
0d536673 4151 fputc('\n', f);
b0e39c82 4152
d5e172d2
ZJS		 4153 /************************************************************/
4154
4155 serialize_addresses(f, "NTP", NULL,
4156 link->ntp ?: link->network->ntp,
4157 link->dhcp_lease,
4158 link->network->dhcp_use_ntp,
4159 SD_DHCP_LEASE_NTP_SERVERS,
4160 dhcp6_lease,
4161 link->network->dhcp6_use_ntp,
4162 sd_dhcp6_lease_get_ntp_addrs,
4163 sd_dhcp6_lease_get_ntp_fqdn);
4164
4165 serialize_addresses(f, "SIP", NULL,
4166 link->network->sip,
4167 link->dhcp_lease,
4168 link->network->dhcp_use_sip,
4169 SD_DHCP_LEASE_SIP_SERVERS,
4170 false, NULL, NULL, NULL);
4171
4172 serialize_addresses(f, "POP3_SERVERS", NULL,
4173 link->network->pop3,
4174 link->dhcp_lease,
4175 true,
4176 SD_DHCP_LEASE_POP3_SERVERS,
4177 false, NULL, NULL, NULL);
4178
4179 serialize_addresses(f, "SMTP_SERVERS", NULL,
4180 link->network->smtp,
4181 link->dhcp_lease,
4182 true,
4183 SD_DHCP_LEASE_SMTP_SERVERS,
4184 false, NULL, NULL, NULL);
4185
4186 serialize_addresses(f, "LPR_SERVERS", NULL,
4187 link->network->lpr,
4188 link->dhcp_lease,
4189 true,
4190 SD_DHCP_LEASE_LPR_SERVERS,
4191 false, NULL, NULL, NULL);
4192
4193 /************************************************************/
bd8f6538 4194
b2a81c0b 4195 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 4196 if (link->dhcp_lease) {
b2a81c0b 4197 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 4198 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
4199 }
b2a81c0b
LP		 4200 if (dhcp6_lease)
4201 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 4202 }
4203
fe0e16db
YW		 4204 fputs("DOMAINS=", f);
4205 space = false;
15761549 4206 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains, i)
fe0e16db 4207 fputs_with_space(f, p, NULL, &space);
07bdc70d 4208
1e7a0e21 4209 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP		 4210 if (dhcp_domainname)
4211 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4212 if (dhcp_domains)
4213 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4214 if (dhcp6_domains)
4215 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 4216 }
4217
4218 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
4219 NDiscDNSSL *dd;
1e7a0e21
LP		 4220
4221 SET_FOREACH(dd, link->ndisc_dnssl, i)
4222 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4223 }
b2a81c0b 4224
0d536673 4225 fputc('\n', f);
6192b846 4226
d5e172d2
ZJS		 4227 /************************************************************/
4228
fe0e16db
YW		 4229 fputs("ROUTE_DOMAINS=", f);
4230 space = false;
15761549 4231 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains, i)
fe0e16db 4232 fputs_with_space(f, p, NULL, &space);
b2a81c0b 4233
1e7a0e21 4234 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
1e7a0e21
LP		 4235 if (dhcp_domainname)
4236 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4237 if (dhcp_domains)
4238 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4239 if (dhcp6_domains)
4240 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 4241 }
4242
4243 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
4244 NDiscDNSSL *dd;
1e7a0e21
LP		 4245
4246 SET_FOREACH(dd, link->ndisc_dnssl, i)
4247 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4248 }
b2a81c0b 4249
0d536673 4250 fputc('\n', f);
67272d15 4251
d5e172d2
ZJS		 4252 /************************************************************/
4253
3c9b8860 4254 fprintf(f, "LLMNR=%s\n",
15761549 4255 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
d5e172d2
ZJS		 4256
4257 /************************************************************/
4258
aaa297d4 4259 fprintf(f, "MDNS=%s\n",
15761549 4260 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
15761549 4261
d5e172d2
ZJS		 4262 /************************************************************/
4263
4264 int dns_default_route =
4265 link->dns_default_route >= 0 ? link->dns_default_route :
4266 link->network->dns_default_route;
4267 if (dns_default_route >= 0)
4268 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(dns_default_route));
4269
4270 /************************************************************/
4271
4272 DnsOverTlsMode dns_over_tls_mode =
4273 link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID ? link->dns_over_tls_mode :
4274 link->network->dns_over_tls_mode;
4275 if (dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
4276 fprintf(f, "DNS_OVER_TLS=%s\n", dns_over_tls_mode_to_string(dns_over_tls_mode));
4277
4278 /************************************************************/
4279
4280 DnssecMode dnssec_mode =
4281 link->dnssec_mode != _DNSSEC_MODE_INVALID ? link->dnssec_mode :
4282 link->network->dnssec_mode;
4283 if (dnssec_mode != _DNSSEC_MODE_INVALID)
4284 fprintf(f, "DNSSEC=%s\n", dnssec_mode_to_string(dnssec_mode));
4285
4286 /************************************************************/
4287
4288 Set *nta_anchors = link->dnssec_negative_trust_anchors;
4289 if (set_isempty(nta_anchors))
4290 nta_anchors = link->network->dnssec_negative_trust_anchors;
4291
4292 if (!set_isempty(nta_anchors)) {
8a516214
LP		 4293 const char *n;
4294
0d536673 4295 fputs("DNSSEC_NTA=", f);
8a516214 4296 space = false;
d5e172d2 4297 SET_FOREACH(n, nta_anchors, i)
d390f8ef 4298 fputs_with_space(f, n, NULL, &space);
0d536673 4299 fputc('\n', f);
8a516214
LP		 4300 }
4301
d5e172d2
ZJS		 4302 /************************************************************/
4303
0d536673 4304 fputs("ADDRESSES=", f);
e7780c8d
TG		 4305 space = false;
4306 SET_FOREACH(a, link->addresses, i) {
4307 _cleanup_free_ char *address_str = NULL;
4308
4309 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
4310 if (r < 0)
4311 goto fail;
4312
e7780c8d
TG		 4313 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
4314 space = true;
4315 }
0d536673 4316 fputc('\n', f);
c1eb9872 4317
d5e172d2
ZJS		 4318 /************************************************************/
4319
0d536673 4320 fputs("ROUTES=", f);
c1eb9872
TG		 4321 space = false;
4322 SET_FOREACH(route, link->routes, i) {
4323 _cleanup_free_ char *route_str = NULL;
4324
4325 r = in_addr_to_string(route->family, &route->dst, &route_str);
4326 if (r < 0)
4327 goto fail;
4328
ecc3f340
ZJS		 4329 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
4330 space ? " " : "", route_str,
f833694d 4331 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 4332 space = true;
4333 }
4334
0d536673 4335 fputc('\n', f);
bcb7a07e 4336 }
7374f9d8 4337
b295beea
LP		 4338 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
4339 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 4340
8eb9058d 4341 if (link->dhcp_lease) {
0bc70f1d 4342 struct in_addr address;
8eb9058d
LP		 4343 const char *tz = NULL;
4344
0bc70f1d
TG		 4345 assert(link->network);
4346
8eb9058d
LP		 4347 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
4348 if (r >= 0)
4349 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 4350
0bc70f1d
TG		 4351 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
4352 if (r >= 0) {
0d536673 4353 fputs("DHCP4_ADDRESS=", f);
d8bff5cc 4354 serialize_in_addrs(f, &address, 1, NULL, NULL);
0d536673 4355 fputc('\n', f);
0bc70f1d 4356 }
d9876a52 4357
bd91b83e 4358 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 4359 if (r < 0)
c2d6bd61 4360 goto fail;
fe8db0c5 4361
7374f9d8 4362 fprintf(f,
b0e39c82
TG		 4363 "DHCP_LEASE=%s\n",
4364 link->lease_file);
deb2e523 4365 } else
6990fb6b 4366 (void) unlink(link->lease_file);
fe8db0c5 4367
0bc70f1d
TG		 4368 if (link->ipv4ll) {
4369 struct in_addr address;
4370
4371 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
4372 if (r >= 0) {
0d536673 4373 fputs("IPV4LL_ADDRESS=", f);
072320ea 4374 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 4375 fputc('\n', f);
0bc70f1d
TG		 4376 }
4377 }
4378
c2d6bd61
LP		 4379 r = fflush_and_check(f);
4380 if (r < 0)
4381 goto fail;
fe8db0c5 4382
c2d6bd61 4383 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 4384 r = -errno;
c2d6bd61 4385 goto fail;
fe8db0c5
TG		 4386 }
4387
c2d6bd61 4388 return 0;
dacd6cee 4389
c2d6bd61 4390fail:
6a7a4e4d 4391 (void) unlink(link->state_file);
6a7a4e4d
LP		 4392 if (temp_path)
4393 (void) unlink(temp_path);
4394
dacd6cee 4395 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 4396}
4397
84de38c5
TG		 4398/* The serialized state in /run is no longer up-to-date. */
4399void link_dirty(Link *link) {
4400 int r;
4401
4402 assert(link);
4403
0c241a37
SS		 4404 /* mark manager dirty as link is dirty */
4405 manager_dirty(link->manager);
4406
84de38c5
TG		 4407 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
4408 if (r < 0)
4409 /* allocation errors are ignored */
4410 return;
4411
4412 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 4413 if (r <= 0)
4414 /* don't take another ref if the link was already dirty */
84de38c5
TG		 4415 return;
4416
4417 link_ref(link);
4418}
4419
4420/* The serialized state in /run is up-to-date */
4421void link_clean(Link *link) {
4422 assert(link);
4423 assert(link->manager);
4424
1046bf9b 4425 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4426}
4427
fe8db0c5 4428static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4429 [LINK_STATE_PENDING] = "pending",
bd08ce56 4430 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 4431 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 4432 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4433 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4434 [LINK_STATE_FAILED] = "failed",
370e9930 4435 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4436};
4437
4438DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
5ecb131d
YW		 4439
4440int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg) {
4441 const char *err_msg = NULL;
4442
4443 (void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg);
ab119e63
YW		 4444 return log_link_full(link, level, err,
4445 "%s: %s%s%s%m",
4446 msg,
4447 strempty(err_msg),
4448 err_msg && !endswith(err_msg, ".") ? "." : "",
4449 err_msg ? " " : "");
5ecb131d 4450}
Unnamed repository; edit this file 'description' to name the repository.