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Merge pull request #16316 from yuwata/backlight-use-actual-brightness
[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
7936917e
YW		 349 if (netdev->ifindex <= 0)
350 return;
351
45e11abf
YW		 352 if (link_get(link->manager, netdev->ifindex, &master) < 0)
353 return;
354
355 link_update_operstate(master, true);
356}
357
358void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 359 LinkOperationalState operstate;
1678fbb3
YW		 360 LinkCarrierState carrier_state;
361 LinkAddressState address_state;
35c5a9ca 362 _cleanup_strv_free_ char **p = NULL;
1678fbb3 363 uint8_t scope = RT_SCOPE_NOWHERE;
35c5a9ca 364 bool changed = false;
1678fbb3 365 Address *address;
45e11abf 366 Iterator i;
14153d1b 367
84de38c5
TG		 368 assert(link);
369
370 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 371 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 372 else if (link_has_carrier(link)) {
1678fbb3
YW		 373 if (link_is_enslaved(link))
374 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 375 else
1678fbb3 376 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 377 } else if (link->flags & IFF_UP)
1678fbb3 378 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 379 else
1678fbb3 380 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 381
1678fbb3 382 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 383 Link *slave;
384
5f707e12 385 SET_FOREACH(slave, link->slaves, i) {
959f65d3 386 link_update_operstate(slave, false);
84de38c5 387
1678fbb3
YW		 388 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
389 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 390 }
959f65d3 391 }
84de38c5 392
1678fbb3
YW		 393 SET_FOREACH(address, link->addresses, i) {
394 if (!address_is_ready(address))
395 continue;
84de38c5 396
1678fbb3
YW		 397 if (address->scope < scope)
398 scope = address->scope;
399 }
84de38c5 400
1678fbb3
YW		 401 /* for operstate we also take foreign addresses into account */
402 SET_FOREACH(address, link->addresses_foreign, i) {
403 if (!address_is_ready(address))
404 continue;
405
406 if (address->scope < scope)
407 scope = address->scope;
408 }
409
410 if (scope < RT_SCOPE_SITE)
411 /* universally accessible addresses found */
412 address_state = LINK_ADDRESS_STATE_ROUTABLE;
413 else if (scope < RT_SCOPE_HOST)
414 /* only link or site local addresses found */
415 address_state = LINK_ADDRESS_STATE_DEGRADED;
84de38c5 416 else
1678fbb3
YW		 417 /* no useful addresses found */
418 address_state = LINK_ADDRESS_STATE_OFF;
419
420 /* Mapping of address and carrier state vs operational state
421 * carrier state
422 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
423 * ------------------------------------------------------------------------------
424 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
425 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
426 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
427 */
84de38c5 428
1678fbb3
YW		 429 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
430 operstate = (LinkOperationalState) carrier_state;
431 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
432 operstate = LINK_OPERSTATE_ROUTABLE;
433 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
434 operstate = LINK_OPERSTATE_DEGRADED;
435 else
14153d1b
YW		 436 operstate = LINK_OPERSTATE_ENSLAVED;
437
35c5a9ca
YW		 438 if (link->carrier_state != carrier_state) {
439 link->carrier_state = carrier_state;
440 changed = true;
441 if (strv_extend(&p, "CarrierState") < 0)
442 log_oom();
443 }
959f65d3 444
35c5a9ca
YW		 445 if (link->address_state != address_state) {
446 link->address_state = address_state;
447 changed = true;
448 if (strv_extend(&p, "AddressState") < 0)
449 log_oom();
959f65d3
YW		 450 }
451
84de38c5
TG		 452 if (link->operstate != operstate) {
453 link->operstate = operstate;
35c5a9ca
YW		 454 changed = true;
455 if (strv_extend(&p, "OperationalState") < 0)
456 log_oom();
84de38c5 457 }
959f65d3 458
35c5a9ca
YW		 459 if (p)
460 link_send_changed_strv(link, p);
461 if (changed)
462 link_dirty(link);
463
45e11abf
YW		 464 if (also_update_master && link->network) {
465 link_update_master_operstate(link, link->network->bond);
466 link_update_master_operstate(link, link->network->bridge);
959f65d3 467 }
84de38c5
TG		 468}
469
51d18171
TG		 470#define FLAG_STRING(string, flag, old, new) \
471 (((old ^ new) & flag) \
472 ? ((old & flag) ? (" -" string) : (" +" string)) \
473 : "")
474
bb262ef0 475static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 476 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
477 uint8_t operstate;
478 int r;
479
480 assert(link);
481
482 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 483 if (r < 0)
484 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 485
1c4baffc 486 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 487 if (r < 0)
488 /* if we got a message without operstate, take it to mean
489 the state was unchanged */
490 operstate = link->kernel_operstate;
491
bb262ef0 492 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 493 return 0;
494
495 if (link->flags != flags) {
6a7a4e4d 496 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		 497 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
498 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
499 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
500 FLAG_STRING("UP", IFF_UP, link->flags, flags),
501 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
502 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
503 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
504 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
505 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
506 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
507 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
508 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
509 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
510 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
511 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
512 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
513 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
514 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
515 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
516
517 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
518 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
519 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
520 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
521 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
522 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
523 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
524 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
525
526 /* link flags are currently at most 18 bits, let's align to
527 * printing 20 */
528 if (unknown_flags_added)
79008bdd 529 log_link_debug(link,
6a7a4e4d 530 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 531 unknown_flags_added);
532
533 if (unknown_flags_removed)
79008bdd 534 log_link_debug(link,
6a7a4e4d 535 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 536 unknown_flags_removed);
537 }
538
539 link->flags = flags;
540 link->kernel_operstate = operstate;
541
959f65d3 542 link_update_operstate(link, true);
51d18171
TG		 543
544 return 0;
545}
546
1c4baffc 547static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 548 _cleanup_(link_unrefp) Link *link = NULL;
6cad256d 549 const char *ifname, *kind = NULL;
b710e6b6 550 unsigned short iftype;
572b21d9
YW		 551 int r, ifindex;
552 uint16_t type;
f579559b 553
0c2f9b84 554 assert(manager);
505f8da7 555 assert(message);
f579559b
TG		 556 assert(ret);
557
6cad256d
TJ		 558 /* check for link kind */
559 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
560 if (r == 0) {
db2f8a2e 561 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 562 r = sd_netlink_message_exit_container(message);
563 if (r < 0)
564 return r;
565 }
566
1c4baffc 567 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 568 if (r < 0)
569 return r;
570 else if (type != RTM_NEWLINK)
571 return -EINVAL;
572
573 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
574 if (r < 0)
575 return r;
576 else if (ifindex <= 0)
577 return -EINVAL;
578
b710e6b6
LP		 579 r = sd_rtnl_message_link_get_type(message, &iftype);
580 if (r < 0)
581 return r;
582
1c4baffc 583 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 584 if (r < 0)
585 return r;
586
17f9c355 587 link = new(Link, 1);
f579559b
TG		 588 if (!link)
589 return -ENOMEM;
590
17f9c355
YW		 591 *link = (Link) {
592 .n_ref = 1,
593 .manager = manager,
594 .state = LINK_STATE_PENDING,
17f9c355
YW		 595 .ifindex = ifindex,
596 .iftype = iftype,
15761549
YW		 597
598 .n_dns = (unsigned) -1,
599 .dns_default_route = -1,
600 .llmnr = _RESOLVE_SUPPORT_INVALID,
601 .mdns = _RESOLVE_SUPPORT_INVALID,
602 .dnssec_mode = _DNSSEC_MODE_INVALID,
603 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
17f9c355
YW		 604 };
605
505f8da7
TG		 606 link->ifname = strdup(ifname);
607 if (!link->ifname)
608 return -ENOMEM;
f579559b 609
6cad256d
TJ		 610 if (kind) {
611 link->kind = strdup(kind);
612 if (!link->kind)
613 return -ENOMEM;
614 }
615
cbff7170
TJ		 616 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
617 if (r < 0)
618 log_link_debug_errno(link, r, "New device has no master, continuing without");
619
1c4baffc 620 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 621 if (r < 0)
34437b4f 622 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 623
c643bda5 624 r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac);
4bb7cc82
YW		 625 if (r < 0)
626 log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
627
c643bda5
YW		 628 r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver);
629 if (r < 0)
630 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
631
572b21d9
YW		 632 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &link->alternative_names);
633 if (r < 0 && r != -ENODATA)
634 return r;
635
34437b4f 636 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 637 return -ENOMEM;
fe8db0c5 638
34437b4f 639 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 640 return -ENOMEM;
641
34437b4f 642 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 643 return -ENOMEM;
644
d5099efc 645 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 646 if (r < 0)
647 return r;
648
649 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 650 if (r < 0)
651 return r;
652
bb262ef0 653 r = link_update_flags(link, message, false);
51d18171
TG		 654 if (r < 0)
655 return r;
656
1cc6c93a 657 *ret = TAKE_PTR(link);
f579559b
TG		 658
659 return 0;
660}
661
15761549
YW		 662void link_ntp_settings_clear(Link *link) {
663 link->ntp = strv_free(link->ntp);
664}
665
666void link_dns_settings_clear(Link *link) {
667 link->dns = mfree(link->dns);
668 link->n_dns = (unsigned) -1;
669
670 link->search_domains = ordered_set_free_free(link->search_domains);
671 link->route_domains = ordered_set_free_free(link->route_domains);
672
673 link->dns_default_route = -1;
674 link->llmnr = _RESOLVE_SUPPORT_INVALID;
675 link->mdns = _RESOLVE_SUPPORT_INVALID;
676 link->dnssec_mode = _DNSSEC_MODE_INVALID;
677 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
678
679 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
680}
681
1a6bb31f
YW		 682static void link_free_engines(Link *link) {
683 if (!link)
684 return;
685
686 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
687 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
688 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
689 link->dhcp_routes = set_free(link->dhcp_routes);
690
691 link->lldp = sd_lldp_unref(link->lldp);
692
693 ndisc_flush(link);
694
695 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
696 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
697 link->ndisc = sd_ndisc_unref(link->ndisc);
698 link->radv = sd_radv_unref(link->radv);
699}
700
8301aa0b 701static Link *link_free(Link *link) {
428fd0a7
TG		 702 Address *address;
703
8301aa0b 704 assert(link);
f579559b 705
15761549
YW		 706 link_ntp_settings_clear(link);
707 link_dns_settings_clear(link);
708
f535e354
YW		 709 link->routes = set_free_with_destructor(link->routes, route_free);
710 link->routes_foreign = set_free_with_destructor(link->routes_foreign, route_free);
adda1ed9 711
c16c7808
SS		 712 link->nexthops = set_free_with_destructor(link->nexthops, nexthop_free);
713 link->nexthops_foreign = set_free_with_destructor(link->nexthops_foreign, nexthop_free);
714
d1bdafd2
WKI		 715 link->neighbors = set_free_with_destructor(link->neighbors, neighbor_free);
716 link->neighbors_foreign = set_free_with_destructor(link->neighbors_foreign, neighbor_free);
717
f535e354
YW		 718 link->addresses = set_free_with_destructor(link->addresses, address_free);
719 link->addresses_foreign = set_free_with_destructor(link->addresses_foreign, address_free);
adda1ed9 720
11bf3cce
LP		 721 while ((address = link->pool_addresses)) {
722 LIST_REMOVE(addresses, link->pool_addresses, address);
723 address_free(address);
724 }
725
7272b25e 726 link_lldp_emit_stop(link);
1a6bb31f 727 link_free_engines(link);
68a8723c 728 free(link->lease_file);
49699bac
SS		 729 free(link->lldp_file);
730
c166a070 731 free(link->ifname);
572b21d9 732 strv_free(link->alternative_names);
ceac4078 733 free(link->kind);
8d968fdd 734 free(link->ssid);
c643bda5 735 free(link->driver);
6cad256d 736
db2f8a2e 737 (void) unlink(link->state_file);
fe8db0c5 738 free(link->state_file);
c166a070 739
51517f9e 740 sd_device_unref(link->sd_device);
b5db00e5 741
0d4ad91d 742 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 743 hashmap_free(link->bound_by_links);
744
5f707e12 745 set_free_with_destructor(link->slaves, link_unref);
033295c1 746
c9c908a6
YW		 747 network_unref(link->network);
748
8301aa0b 749 return mfree(link);
14b746f7
TG		 750}
751
8301aa0b 752DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 753
11a7f229
TG		 754int link_get(Manager *m, int ifindex, Link **ret) {
755 Link *link;
11a7f229
TG		 756
757 assert(m);
e856ed00 758 assert(ifindex > 0);
11a7f229
TG		 759 assert(ret);
760
ae06ab10 761 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 762 if (!link)
763 return -ENODEV;
764
765 *ret = link;
766
767 return 0;
768}
769
af9ba57a 770void link_set_state(Link *link, LinkState state) {
e331e246
TG		 771 assert(link);
772
773 if (link->state == state)
774 return;
775
0beb9542
YW		 776 log_link_debug(link, "State changed: %s -> %s",
777 link_state_to_string(link->state),
778 link_state_to_string(state));
779
e331e246
TG		 780 link->state = state;
781
782 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 783}
784
57bd6899
TG		 785static void link_enter_unmanaged(Link *link) {
786 assert(link);
787
e331e246 788 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 789
84de38c5 790 link_dirty(link);
57bd6899
TG		 791}
792
95355a28 793int link_stop_clients(Link *link, bool may_keep_dhcp) {
111bb8f9 794 int r = 0, k;
051e77ca 795 Address *ad;
111bb8f9
TG		 796
797 assert(link);
798 assert(link->manager);
799 assert(link->manager->event);
800
d03073dd
YW		 801 dhcp4_release_old_lease(link);
802
80060352
ZJS		 803 bool keep_dhcp = may_keep_dhcp &&
804 link->network &&
805 (link->manager->restarting ||
806 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
807
808 if (link->dhcp_client && !keep_dhcp) {
111bb8f9 809 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 810 if (k < 0)
36c7d709 811 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 812 }
813
ba179154 814 if (link->ipv4ll) {
111bb8f9 815 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 816 if (k < 0)
36c7d709 817 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 818 }
819
051e77ca
SS		 820 if (link->network)
821 LIST_FOREACH(addresses, ad, link->network->static_addresses)
822 if (ad->acd && sd_ipv4acd_is_running(ad->acd) == 0) {
823 k = sd_ipv4acd_stop(ad->acd);
824 if (k < 0)
825 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
826 }
827
f5a8c43f
TG		 828 if (link->dhcp6_client) {
829 k = sd_dhcp6_client_stop(link->dhcp6_client);
830 if (k < 0)
36c7d709 831 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 832 }
4138fb2c 833
1e7a0e21
LP		 834 if (link->ndisc) {
835 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 836 if (k < 0)
36c7d709 837 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 838 }
839
7465dd22
PF		 840 if (link->radv) {
841 k = sd_radv_stop(link->radv);
842 if (k < 0)
843 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
844 }
845
7272b25e 846 link_lldp_emit_stop(link);
111bb8f9
TG		 847 return r;
848}
849
b22d8a00 850void link_enter_failed(Link *link) {
ef1ba606 851 assert(link);
f882c247 852
370e9930 853 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 854 return;
855
6a7a4e4d 856 log_link_warning(link, "Failed");
449f7554 857
e331e246 858 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 859
95355a28 860 link_stop_clients(link, false);
111bb8f9 861
84de38c5 862 link_dirty(link);
f882c247
TG		 863}
864
7033af49
YW		 865static int link_join_netdevs_after_configured(Link *link) {
866 NetDev *netdev;
867 Iterator i;
868 int r;
869
870 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
871 if (netdev->ifindex > 0)
872 /* Assume already enslaved. */
873 continue;
874
875 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
876 continue;
877
878 log_struct(LOG_DEBUG,
879 LOG_LINK_INTERFACE(link),
880 LOG_NETDEV_INTERFACE(netdev),
881 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
882
883 r = netdev_join(netdev, link, NULL);
884 if (r < 0)
885 return log_struct_errno(LOG_WARNING, r,
886 LOG_LINK_INTERFACE(link),
887 LOG_NETDEV_INTERFACE(netdev),
888 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
889 }
890
891 return 0;
892}
893
e3a7b048 894static void link_enter_configured(Link *link) {
dd43110f
TG		 895 assert(link);
896 assert(link->network);
e3a7b048 897
289e6774 898 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 899 return;
dd43110f 900
e331e246 901 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 902
7033af49
YW		 903 (void) link_join_netdevs_after_configured(link);
904
84de38c5 905 link_dirty(link);
dd43110f
TG		 906}
907
47079967 908static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 909 RoutingPolicyRule *rule, *rrule = NULL;
910 int r;
911
912 assert(link);
913 assert(link->network);
914
2428613f
YW		 915 link->routing_policy_rules_configured = false;
916
8a9b3a23 917 LIST_FOREACH(rules, rule, link->network->rules) {
b80a511b 918 r = routing_policy_rule_get(link->manager, rule, &rrule);
ff14e2eb
YW		 919 if (r >= 0) {
920 if (r == 0)
921 (void) routing_policy_rule_make_local(link->manager, rrule);
8a9b3a23
SS		 922 continue;
923 }
924
9f08a578 925 r = routing_policy_rule_configure(rule, link, NULL);
4ff296b0
YW		 926 if (r < 0)
927 return log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
7ef7e550
YW		 928 if (r > 0)
929 link->routing_policy_rule_messages++;
8a9b3a23
SS		 930 }
931
932 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 933 if (link->routing_policy_rule_messages == 0) {
934 link->routing_policy_rules_configured = true;
935 link_check_ready(link);
b425c3ae 936 } else {
7715629e 937 log_link_debug(link, "Setting routing policy rules");
b425c3ae
YW		 938 link_set_state(link, LINK_STATE_CONFIGURING);
939 }
8a9b3a23
SS		 940
941 return 0;
942}
943
c16c7808
SS		 944static int nexthop_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
945 int r;
946
947 assert(link);
948 assert(link->nexthop_messages > 0);
949 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
950 LINK_STATE_FAILED, LINK_STATE_LINGER));
951
952 link->nexthop_messages--;
953
954 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
955 return 1;
956
957 r = sd_netlink_message_get_errno(m);
958 if (r < 0 && r != -EEXIST) {
5ecb131d 959 log_link_message_warning_errno(link, m, r, "Could not set nexthop");
c16c7808
SS		 960 link_enter_failed(link);
961 return 1;
962 }
963
964 if (link->nexthop_messages == 0) {
965 log_link_debug(link, "Nexthop set");
966 link->static_nexthops_configured = true;
967 link_check_ready(link);
968 }
969
970 return 1;
971}
972
973int link_request_set_nexthop(Link *link) {
974 NextHop *nh;
975 int r;
976
977 LIST_FOREACH(nexthops, nh, link->network->static_nexthops) {
978 r = nexthop_configure(nh, link, nexthop_handler);
979 if (r < 0)
980 return log_link_warning_errno(link, r, "Could not set nexthop: %m");
981 if (r > 0)
982 link->nexthop_messages++;
983 }
984
985 if (link->nexthop_messages == 0) {
986 link->static_nexthops_configured = true;
987 link_check_ready(link);
988 } else {
989 log_link_debug(link, "Setting nexthop");
990 link_set_state(link, LINK_STATE_CONFIGURING);
991 }
992
993 return 1;
994}
995
302a796f 996static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 997 int r;
998
1046bf9b 999 assert(link);
7715629e 1000 assert(link->route_messages > 0);
289e6774
WKI		 1001 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
1002 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1003
7715629e 1004 link->route_messages--;
f882c247 1005
77a008c0 1006 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1007 return 1;
1008
1c4baffc 1009 r = sd_netlink_message_get_errno(m);
4ff296b0 1010 if (r < 0 && r != -EEXIST) {
5ecb131d 1011 log_link_message_warning_errno(link, m, r, "Could not set route");
4ff296b0
YW		 1012 link_enter_failed(link);
1013 return 1;
1014 }
f882c247 1015
7715629e 1016 if (link->route_messages == 0) {
6a7a4e4d 1017 log_link_debug(link, "Routes set");
7715629e 1018 link->static_routes_configured = true;
8012cd39 1019 link_check_ready(link);
dd3efc09 1020 }
f882c247
TG		 1021
1022 return 1;
1023}
1024
b5799eeb 1025int link_request_set_routes(Link *link) {
bf61b05a
LP		 1026 enum {
1027 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
1028 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
1029 _PHASE_MAX
1030 } phase;
a6cc569e 1031 Route *rt;
f882c247
TG		 1032 int r;
1033
1034 assert(link);
1035 assert(link->network);
c42ff3a1
WKI		 1036 assert(link->addresses_configured);
1037 assert(link->address_messages == 0);
289e6774 1038 assert(link->state != _LINK_STATE_INVALID);
f882c247 1039
2428613f 1040 link->static_routes_configured = false;
c16c7808 1041 link->static_routes_ready = false;
27c34f73 1042
4e2ef9d9
YW		 1043 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
1044 /* During configuring addresses, the link lost its carrier. As networkd is dropping
1045 * the addresses now, let's not configure the routes either. */
1046 return 0;
1047
47079967 1048 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 1049 if (r < 0)
1050 return r;
f882c247 1051
bf61b05a
LP		 1052 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
1053 for (phase = 0; phase < _PHASE_MAX; phase++)
1054 LIST_FOREACH(routes, rt, link->network->static_routes) {
1985c54f
YW		 1055 if (rt->gateway_from_dhcp)
1056 continue;
0d34228f 1057
6ff5cc6b 1058 if ((in_addr_is_null(rt->family, &rt->gw) && ordered_set_isempty(rt->multipath_routes)) != (phase == PHASE_NON_GATEWAY))
bf61b05a 1059 continue;
a6cc569e 1060
0d34228f 1061 r = route_configure(rt, link, route_handler);
4ff296b0
YW		 1062 if (r < 0)
1063 return log_link_warning_errno(link, r, "Could not set routes: %m");
c4423317
YW		 1064 if (r > 0)
1065 link->route_messages++;
0d34228f 1066 }
f5be5601 1067
7715629e
ST		 1068 if (link->route_messages == 0) {
1069 link->static_routes_configured = true;
8012cd39 1070 link_check_ready(link);
b425c3ae 1071 } else {
6a7a4e4d 1072 log_link_debug(link, "Setting routes");
b425c3ae
YW		 1073 link_set_state(link, LINK_STATE_CONFIGURING);
1074 }
f882c247
TG		 1075
1076 return 0;
1077}
1078
6accfd31
DA		 1079void link_check_ready(Link *link) {
1080 Address *a;
1081 Iterator i;
4ff296b0 1082 int r;
6accfd31
DA		 1083
1084 assert(link);
1085
1086 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1087 return;
1088
1089 if (!link->network)
1090 return;
1091
1092 if (!link->addresses_configured)
1093 return;
1094
1095 if (!link->neighbors_configured)
1096 return;
1097
6aa5773b
DA		 1098 SET_FOREACH(a, link->addresses, i)
1099 if (!address_is_ready(a))
1100 return;
1101
1102 if (!link->addresses_ready) {
1103 link->addresses_ready = true;
4ff296b0
YW		 1104 r = link_request_set_routes(link);
1105 if (r < 0)
1106 link_enter_failed(link);
710ce9e5 1107 return;
6aa5773b
DA		 1108 }
1109
6accfd31
DA		 1110 if (!link->static_routes_configured)
1111 return;
1112
c16c7808
SS		 1113 if (!link->static_routes_ready) {
1114 link->static_routes_ready = true;
1115 r = link_request_set_nexthop(link);
1116 if (r < 0)
1117 link_enter_failed(link);
1118 return;
1119 }
1120
1121 if (!link->static_nexthops_configured)
1122 return;
1123
6accfd31
DA		 1124 if (!link->routing_policy_rules_configured)
1125 return;
1126
34658df2 1127 if (!link->tc_configured)
4ecdcb07
YW		 1128 return;
1129
463797c1 1130 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
6accfd31 1131
2aa7d367 1132 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !link->ipv4ll_address)
463797c1 1133 return;
6accfd31 1134
463797c1
YW		 1135 if (link_ipv6ll_enabled(link) &&
1136 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
1137 return;
6accfd31 1138
3cd5924c 1139 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link)) &&
463797c1
YW		 1140 !link->dhcp4_configured &&
1141 !link->dhcp6_configured &&
3cd5924c 1142 !link->ndisc_configured &&
2aa7d367 1143 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address))
3cd5924c 1144 /* When DHCP or RA is enabled, at least one protocol must provide an address, or
463797c1
YW		 1145 * an IPv4ll fallback address must be configured. */
1146 return;
463797c1 1147 }
6accfd31 1148
6accfd31
DA		 1149 if (link->state != LINK_STATE_CONFIGURED)
1150 link_enter_configured(link);
1151
1152 return;
1153}
1154
e4a71bf3
WKI		 1155static int link_request_set_neighbors(Link *link) {
1156 Neighbor *neighbor;
1157 int r;
1158
1159 assert(link);
1160 assert(link->network);
1161 assert(link->state != _LINK_STATE_INVALID);
1162
2428613f 1163 link->neighbors_configured = false;
e4a71bf3
WKI		 1164
1165 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
1166 r = neighbor_configure(neighbor, link, NULL);
4ff296b0
YW		 1167 if (r < 0)
1168 return log_link_warning_errno(link, r, "Could not set neighbor: %m");
e4a71bf3
WKI		 1169 }
1170
1171 if (link->neighbor_messages == 0) {
1172 link->neighbors_configured = true;
1173 link_check_ready(link);
b425c3ae 1174 } else {
e4a71bf3 1175 log_link_debug(link, "Setting neighbors");
b425c3ae
YW		 1176 link_set_state(link, LINK_STATE_CONFIGURING);
1177 }
e4a71bf3
WKI		 1178
1179 return 0;
1180}
1181
9efa8a3c 1182int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1183 int r;
1184
4958aee4 1185 assert(rtnl);
f5be5601
TG		 1186 assert(m);
1187 assert(link);
1188 assert(link->ifname);
7715629e 1189 assert(link->address_messages > 0);
289e6774 1190 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1191 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1192
7715629e 1193 link->address_messages--;
f882c247 1194
5da8149f 1195 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1196 return 1;
1197
1c4baffc 1198 r = sd_netlink_message_get_errno(m);
4ff296b0 1199 if (r < 0 && r != -EEXIST) {
5ecb131d 1200 log_link_message_warning_errno(link, m, r, "Could not set address");
4ff296b0
YW		 1201 link_enter_failed(link);
1202 return 1;
1203 } else if (r >= 0)
1204 (void) manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1205
7715629e 1206 if (link->address_messages == 0) {
6a7a4e4d 1207 log_link_debug(link, "Addresses set");
c42ff3a1 1208 link->addresses_configured = true;
6aa5773b 1209 link_check_ready(link);
dd3efc09 1210 }
f882c247
TG		 1211
1212 return 1;
1213}
1214
f6bb7ac5
TJ		 1215static int link_set_bridge_fdb(Link *link) {
1216 FdbEntry *fdb_entry;
197e2809 1217 int r;
f6bb7ac5
TJ		 1218
1219 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1220 r = fdb_entry_configure(link, fdb_entry);
197e2809 1221 if (r < 0)
f6bb7ac5 1222 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1223 }
1224
197e2809 1225 return 0;
f6bb7ac5
TJ		 1226}
1227
289e6774 1228static int link_request_set_addresses(Link *link) {
95b74ef6 1229 AddressLabel *label;
a6cc569e 1230 Address *ad;
bd6379ec 1231 Prefix *p;
f882c247
TG		 1232 int r;
1233
1234 assert(link);
1235 assert(link->network);
f5be5601 1236 assert(link->state != _LINK_STATE_INVALID);
f882c247 1237
2428613f
YW		 1238 /* Reset all *_configured flags we are configuring. */
1239 link->addresses_configured = false;
6aa5773b 1240 link->addresses_ready = false;
2428613f
YW		 1241 link->neighbors_configured = false;
1242 link->static_routes_configured = false;
c16c7808
SS		 1243 link->static_routes_ready = false;
1244 link->static_nexthops_configured = false;
2428613f
YW		 1245 link->routing_policy_rules_configured = false;
1246
f6bb7ac5
TJ		 1247 r = link_set_bridge_fdb(link);
1248 if (r < 0)
1249 return r;
1250
f3ef324d
YW		 1251 r = link_request_set_neighbors(link);
1252 if (r < 0)
1253 return r;
e4a71bf3 1254
3d3d4255 1255 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1256 bool update;
1257
1258 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1259
1260 r = address_configure(ad, link, address_handler, update);
4ff296b0
YW		 1261 if (r < 0)
1262 return log_link_warning_errno(link, r, "Could not set addresses: %m");
54a1a535
YW		 1263 if (r > 0)
1264 link->address_messages++;
95b74ef6
SS		 1265 }
1266
bd6379ec
SS		 1267 if (IN_SET(link->network->router_prefix_delegation,
1268 RADV_PREFIX_DELEGATION_STATIC,
1269 RADV_PREFIX_DELEGATION_BOTH))
1270 LIST_FOREACH(prefixes, p, link->network->static_prefixes) {
1271 _cleanup_(address_freep) Address *address = NULL;
1272
1273 if (!p->assign)
1274 continue;
1275
1276 r = address_new(&address);
1277 if (r < 0)
1278 return log_link_error_errno(link, r, "Could not allocate address: %m");
1279
1280 r = sd_radv_prefix_get_prefix(p->radv_prefix, &address->in_addr.in6, &address->prefixlen);
1281 if (r < 0)
1282 return r;
1283
1284 r = generate_ipv6_eui_64_address(link, &address->in_addr.in6);
1285 if (r < 0)
1286 return r;
1287
1288 address->family = AF_INET6;
1289 r = address_configure(address, link, address_handler, true);
1290 if (r < 0)
1291 return log_link_warning_errno(link, r, "Could not set addresses: %m");
1292 if (r > 0)
1293 link->address_messages++;
1294 }
1295
95b74ef6 1296 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1297 r = address_label_configure(label, link, NULL, false);
4ff296b0
YW		 1298 if (r < 0)
1299 return log_link_warning_errno(link, r, "Could not set address label: %m");
f5be5601 1300
7715629e 1301 link->address_label_messages++;
f882c247
TG		 1302 }
1303
d4cdbea5
TG		 1304 /* now that we can figure out a default address for the dhcp server,
1305 start it */
708c425d 1306 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
8fcf1d61 1307 r = dhcp4_server_configure(link);
4ff296b0 1308 if (r < 0)
d4cdbea5 1309 return r;
6a7a4e4d 1310 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1311 }
1312
c42ff3a1
WKI		 1313 if (link->address_messages == 0) {
1314 link->addresses_configured = true;
6aa5773b 1315 link_check_ready(link);
b425c3ae 1316 } else {
6a7a4e4d 1317 log_link_debug(link, "Setting addresses");
b425c3ae
YW		 1318 link_set_state(link, LINK_STATE_CONFIGURING);
1319 }
431ca2ce 1320
f882c247
TG		 1321 return 0;
1322}
1323
13b498f9 1324static int link_set_bridge_vlan(Link *link) {
86e2be7b 1325 int r;
13b498f9
TJ		 1326
1327 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1328 if (r < 0)
1329 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1330
1331 return r;
1332}
1333
a60a720c 1334static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1335 int r;
1336
1337 if (!link_proxy_arp_enabled(link))
1338 return 0;
1339
62e021a9 1340 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1341 if (r < 0)
1342 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1343
1344 return 0;
1345}
1346
3a390124 1347static int link_configure_continue(Link *link);
55dc8c4a 1348
302a796f 1349static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1350 int r;
1351
1352 assert(m);
1353 assert(link);
1354 assert(link->ifname);
1355
55dc8c4a
YW		 1356 link->setting_mtu = false;
1357
5da8149f 1358 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1359 return 1;
1360
1c4baffc 1361 r = sd_netlink_message_get_errno(m);
4ff296b0 1362 if (r < 0)
5ecb131d 1363 log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring");
4ff296b0
YW		 1364 else
1365 log_link_debug(link, "Setting MTU done.");
55dc8c4a 1366
4ff296b0 1367 if (link->state == LINK_STATE_INITIALIZED) {
3a390124 1368 r = link_configure_continue(link);
4ff296b0
YW		 1369 if (r < 0)
1370 link_enter_failed(link);
1371 }
4f882b2a
TG		 1372
1373 return 1;
1374}
1375
933c70a0 1376int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1377 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1378 int r;
1379
1380 assert(link);
1381 assert(link->manager);
1382 assert(link->manager->rtnl);
1383
40288ece
YW		 1384 if (mtu == 0 || link->setting_mtu)
1385 return 0;
1386
933c70a0 1387 if (link->mtu == mtu)
ee493106
YW		 1388 return 0;
1389
6a7a4e4d 1390 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1391
6a7a4e4d
LP		 1392 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1393 if (r < 0)
1394 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1395
44b598a1 1396 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1397 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1398 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1399
1400 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
d236718c 1401 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes");
44b598a1 1402
72c2500b 1403 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1404 }
1405
1c4baffc 1406 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1407 if (r < 0)
1408 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1409
302a796f
YW		 1410 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1411 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1412 if (r < 0)
1413 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1414
ae941762 1415 link_ref(link);
1046bf9b 1416 link->setting_mtu = true;
b226d99b 1417
4f882b2a
TG		 1418 return 0;
1419}
1420
f6fcc1c2
YW		 1421static bool link_reduces_vlan_mtu(Link *link) {
1422 /* See netif_reduces_vlan_mtu() in kernel. */
1423 return streq_ptr(link->kind, "macsec");
1424}
1425
1426static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1427 uint32_t mtu = 0;
1428 NetDev *dev;
1429 Iterator i;
1430
1431 HASHMAP_FOREACH(dev, link->network->stacked_netdevs, i)
1432 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1433 /* See vlan_dev_change_mtu() in kernel. */
1434 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1435
1436 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1437 /* See macvlan_change_mtu() in kernel. */
1438 mtu = dev->mtu;
1439
1440 return mtu;
1441}
1442
1443static int link_configure_mtu(Link *link) {
1444 uint32_t mtu;
1445
1446 assert(link);
1447 assert(link->network);
1448
1449 if (link->network->mtu > 0)
1450 return link_set_mtu(link, link->network->mtu);
1451
1452 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1453 if (link->mtu >= mtu)
1454 return 0;
1455
1456 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1457 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1458 link->mtu, mtu);
1459
1460 return link_set_mtu(link, mtu);
1461}
1462
302a796f 1463static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1464 int r;
1465
1466 assert(m);
1467 assert(link);
1468 assert(link->ifname);
1469
1470 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1471 return 1;
1472
1473 r = sd_netlink_message_get_errno(m);
1474 if (r < 0)
5ecb131d 1475 log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring");
99d2baa2
SS		 1476
1477 return 1;
1478}
1479
1480static int link_set_flags(Link *link) {
1481 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1482 unsigned ifi_change = 0;
1483 unsigned ifi_flags = 0;
1484 int r;
1485
1486 assert(link);
1487 assert(link->manager);
1488 assert(link->manager->rtnl);
1489
1490 if (link->flags & IFF_LOOPBACK)
1491 return 0;
1492
1493 if (!link->network)
1494 return 0;
1495
866e6b7a 1496 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1497 return 0;
1498
1499 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1500 if (r < 0)
1501 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1502
1503 if (link->network->arp >= 0) {
1504 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1505 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1506 }
1507
1508 if (link->network->multicast >= 0) {
1509 ifi_change |= IFF_MULTICAST;
1510 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1511 }
1512
866e6b7a
SS		 1513 if (link->network->allmulticast >= 0) {
1514 ifi_change |= IFF_ALLMULTI;
1515 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1516 }
1517
99d2baa2
SS		 1518 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1519 if (r < 0)
1520 return log_link_error_errno(link, r, "Could not set link flags: %m");
1521
302a796f
YW		 1522 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1523 link_netlink_destroy_callback, link);
99d2baa2
SS		 1524 if (r < 0)
1525 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1526
1527 link_ref(link);
1528
1529 return 0;
1530}
1531
e7ab854c
TG		 1532static int link_acquire_ipv6_conf(Link *link) {
1533 int r;
1534
1535 assert(link);
1536
e7ab854c 1537 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1538 assert(link->ndisc);
e7ab854c
TG		 1539
1540 log_link_debug(link, "Discovering IPv6 routers");
1541
1e7a0e21 1542 r = sd_ndisc_start(link->ndisc);
63348d13 1543 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1544 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1545 }
1546
7465dd22
PF		 1547 if (link_radv_enabled(link)) {
1548 assert(link->radv);
1549 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1550
1551 log_link_debug(link, "Starting IPv6 Router Advertisements");
1552
fd3ef936
YW		 1553 r = radv_emit_dns(link);
1554 if (r < 0)
1555 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
1556
7465dd22
PF		 1557 r = sd_radv_start(link->radv);
1558 if (r < 0 && r != -EBUSY)
1559 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1560 }
1561
cd305af1
SS		 1562 if (link_dhcp6_enabled(link) && link->network->dhcp6_without_ra) {
1563 assert(link->dhcp6_client);
1564 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1565
1566 r = dhcp6_request_address(link, true);
1567 if (r < 0 && r != -EBUSY)
1568 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
1569 else
1570 log_link_debug(link, "Acquiring DHCPv6 lease");
1571 }
1572
10752343
PF		 1573 (void) dhcp6_request_prefix_delegation(link);
1574
e7ab854c
TG		 1575 return 0;
1576}
1577
6fc25497 1578static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1579 int r;
1580
1581 assert(link);
ff254138
TG		 1582 assert(link->manager);
1583 assert(link->manager->event);
1584
910feb78 1585 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1586 assert(link->ipv4ll);
ff254138 1587
6a7a4e4d 1588 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1589
1590 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1591 if (r < 0)
1592 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1593 }
1594
78c958f8 1595 if (link_dhcp4_enabled(link)) {
eb34d4af 1596 assert(link->dhcp_client);
ff254138 1597
6a7a4e4d 1598 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1599
5c1d3fc9 1600 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1601 if (r < 0)
1602 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1603 }
ff254138 1604
6fc25497
SS		 1605 return 0;
1606}
1607
1608static int link_acquire_conf(Link *link) {
1609 int r;
1610
1611 assert(link);
1612
1613 r = link_acquire_ipv4_conf(link);
1614 if (r < 0)
1615 return r;
1616
3f7cc080 1617 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1618 r = link_acquire_ipv6_conf(link);
1619 if (r < 0)
1620 return r;
1621 }
1622
7272b25e
LP		 1623 if (link_lldp_emit_enabled(link)) {
1624 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1625 if (r < 0)
1626 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1627 }
1628
ff254138
TG		 1629 return 0;
1630}
1631
a61bb41c 1632bool link_has_carrier(Link *link) {
deb2e523
TG		 1633 /* see Documentation/networking/operstates.txt in the kernel sources */
1634
a61bb41c 1635 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1636 return true;
1637
a61bb41c 1638 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1639 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1640 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1641 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1642 return true;
1643
1644 return false;
1645}
1646
0e2fdb83
SS		 1647static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1648 int r;
1649
1650 assert(link);
1651
9524014e
DS		 1652 link->setting_genmode = false;
1653
0e2fdb83
SS		 1654 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1655 return 1;
1656
1657 r = sd_netlink_message_get_errno(m);
1658 if (r < 0)
5ecb131d 1659 log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring");
9524014e
DS		 1660 else
1661 log_link_debug(link, "Setting address genmode done.");
1662
1663 if (link->state == LINK_STATE_INITIALIZED) {
1664 r = link_configure_continue(link);
1665 if (r < 0)
1666 link_enter_failed(link);
1667 }
0e2fdb83
SS		 1668
1669 return 1;
1670}
1671
1672static int link_configure_addrgen_mode(Link *link) {
1673 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1674 uint8_t ipv6ll_mode;
1675 int r;
1676
1677 assert(link);
1678 assert(link->network);
1679 assert(link->manager);
1680 assert(link->manager->rtnl);
1681
9524014e 1682 if (!socket_ipv6_is_supported() || link->setting_genmode)
9f6e82e6
YW		 1683 return 0;
1684
0e2fdb83
SS		 1685 log_link_debug(link, "Setting address genmode for link");
1686
1687 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1688 if (r < 0)
1689 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1690
1691 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1692 if (r < 0)
1693 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1694
1695 r = sd_netlink_message_open_container(req, AF_INET6);
1696 if (r < 0)
1697 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1698
1699 if (!link_ipv6ll_enabled(link))
1700 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
6f6296b9 1701 else if (link->network->ipv6ll_address_gen_mode < 0) {
a6f1848a
SS		 1702 r = sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL);
1703 if (r < 0) {
1704 /* The file may not exist. And even if it exists, when stable_secret is unset,
1705 * reading the file fails with EIO. */
1706 log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret: %m");
1707
1708 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1709 } else
1710 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1711 } else
6f6296b9 1712 ipv6ll_mode = link->network->ipv6ll_address_gen_mode;
0e2fdb83
SS		 1713
1714 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1715 if (r < 0)
1716 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1717
1718 r = sd_netlink_message_close_container(req);
1719 if (r < 0)
1720 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1721
1722 r = sd_netlink_message_close_container(req);
1723 if (r < 0)
1724 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1725
1726 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1727 link_netlink_destroy_callback, link);
1728 if (r < 0)
1729 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1730
1731 link_ref(link);
9524014e 1732 link->setting_genmode = true;
0e2fdb83
SS		 1733
1734 return 0;
1735}
1736
302a796f 1737static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1738 int r;
1739
1746cf2a
TG		 1740 assert(link);
1741
5da8149f 1742 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1743 return 1;
1744
1c4baffc 1745 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1746 if (r < 0)
26d6b214 1747 /* we warn but don't fail the link, as it may be brought up later */
5ecb131d 1748 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
45ad2c13 1749
f882c247
TG		 1750 return 1;
1751}
1752
1cc84f3b 1753static int link_up(Link *link) {
4afd3348 1754 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1755 int r;
1756
f882c247 1757 assert(link);
c106cc36 1758 assert(link->network);
f882c247
TG		 1759 assert(link->manager);
1760 assert(link->manager->rtnl);
1761
6a7a4e4d 1762 log_link_debug(link, "Bringing link up");
449f7554 1763
6a7a4e4d
LP		 1764 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1765 if (r < 0)
1766 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1767
2b2d8603 1768 /* set it free if not enslaved with networkd */
6cb955c6 1769 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1770 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1771 if (r < 0)
1772 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1773 }
1774
5d4795f3 1775 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1776 if (r < 0)
1777 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1778
c106cc36 1779 if (link->network->mac) {
1c4baffc 1780 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1781 if (r < 0)
1782 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1783 }
1784
302a796f
YW		 1785 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1786 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1787 if (r < 0)
1788 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1789
b226d99b
TG		 1790 link_ref(link);
1791
f882c247
TG		 1792 return 0;
1793}
1794
302a796f 1795static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1796 int r;
1797
1798 assert(link);
1799
1800 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1801 return 1;
1802
1c4baffc 1803 r = sd_netlink_message_get_errno(m);
0d4ad91d 1804 if (r < 0)
5ecb131d 1805 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
0d4ad91d
AR		 1806
1807 return 1;
1808}
1809
8e54db83 1810int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1811 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1812 int r;
1813
1814 assert(link);
1815 assert(link->manager);
1816 assert(link->manager->rtnl);
1817
6a7a4e4d 1818 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1819
1820 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1821 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1822 if (r < 0)
1823 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1824
1825 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1826 if (r < 0)
1827 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1828
8e54db83
YW		 1829 r = netlink_call_async(link->manager->rtnl, NULL, req,
1830 callback ?: link_down_handler,
302a796f 1831 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1832 if (r < 0)
1833 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1834
1835 link_ref(link);
1836
1837 return 0;
1838}
1839
89fe6535
SS		 1840static int link_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1841 int r;
1842
1843 assert(link);
1844
1845 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1846 return 1;
1847
1848 r = sd_netlink_message_get_errno(m);
1849 if (r < 0)
1850 log_link_message_warning_errno(link, m, r, "Could not set group for the interface");
1851
1852 return 1;
1853}
1854
1855static int link_set_group(Link *link) {
1856 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1857 int r;
1858
1859 assert(link);
1860 assert(link->network);
1861 assert(link->manager);
1862 assert(link->manager->rtnl);
1863
1864 if (link->network->group <= 0)
1865 return 0;
1866
1867 log_link_debug(link, "Setting group");
1868
1869 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1870 if (r < 0)
1871 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1872
1873 r = sd_netlink_message_append_u32(req, IFLA_GROUP, link->network->group);
1874 if (r < 0)
1875 return log_link_error_errno(link, r, "Could not set link group: %m");
1876
1877 r = netlink_call_async(link->manager->rtnl, NULL, req, link_group_handler,
1878 link_netlink_destroy_callback, link);
1879 if (r < 0)
1880 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1881
1882 link_ref(link);
1883
1884 return 0;
1885}
1886
0d4ad91d
AR		 1887static int link_handle_bound_to_list(Link *link) {
1888 Link *l;
1889 Iterator i;
1890 int r;
1891 bool required_up = false;
1892 bool link_is_up = false;
1893
1894 assert(link);
1895
1896 if (hashmap_isempty(link->bound_to_links))
1897 return 0;
1898
1899 if (link->flags & IFF_UP)
1900 link_is_up = true;
1901
1902 HASHMAP_FOREACH (l, link->bound_to_links, i)
1903 if (link_has_carrier(l)) {
1904 required_up = true;
1905 break;
1906 }
1907
1908 if (!required_up && link_is_up) {
8e54db83 1909 r = link_down(link, NULL);
0d4ad91d
AR		 1910 if (r < 0)
1911 return r;
1912 } else if (required_up && !link_is_up) {
1913 r = link_up(link);
1914 if (r < 0)
1915 return r;
1916 }
1917
1918 return 0;
1919}
1920
1921static int link_handle_bound_by_list(Link *link) {
1922 Iterator i;
1923 Link *l;
1924 int r;
1925
1926 assert(link);
1927
1928 if (hashmap_isempty(link->bound_by_links))
1929 return 0;
1930
1931 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1932 r = link_handle_bound_to_list(l);
1933 if (r < 0)
1934 return r;
1935 }
1936
1937 return 0;
1938}
1939
1940static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1941 int r;
1942
1943 assert(link);
1944 assert(carrier);
1945
1946 if (link == carrier)
1947 return 0;
1948
1949 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1950 return 0;
1951
1952 r = hashmap_ensure_allocated(h, NULL);
1953 if (r < 0)
1954 return r;
1955
1956 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1957 if (r < 0)
1958 return r;
1959
1960 return 0;
1961}
1962
1963static int link_new_bound_by_list(Link *link) {
1964 Manager *m;
1965 Link *carrier;
1966 Iterator i;
1967 int r;
1968 bool list_updated = false;
1969
1970 assert(link);
1971 assert(link->manager);
1972
1973 m = link->manager;
1974
b295beea 1975 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 1976 if (!carrier->network)
1977 continue;
1978
1979 if (strv_isempty(carrier->network->bind_carrier))
1980 continue;
1981
191a3f16 1982 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 1983 r = link_put_carrier(link, carrier, &link->bound_by_links);
1984 if (r < 0)
1985 return r;
1986
1987 list_updated = true;
1988 }
1989 }
1990
1991 if (list_updated)
84de38c5 1992 link_dirty(link);
0d4ad91d 1993
b295beea 1994 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 1995 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1996 if (r < 0)
1997 return r;
1998
84de38c5 1999 link_dirty(carrier);
0d4ad91d
AR		 2000 }
2001
2002 return 0;
2003}
2004
2005static int link_new_bound_to_list(Link *link) {
2006 Manager *m;
2007 Link *carrier;
2008 Iterator i;
2009 int r;
2010 bool list_updated = false;
2011
2012 assert(link);
2013 assert(link->manager);
2014
2015 if (!link->network)
2016 return 0;
2017
2018 if (strv_isempty(link->network->bind_carrier))
2019 return 0;
2020
2021 m = link->manager;
2022
2023 HASHMAP_FOREACH (carrier, m->links, i) {
191a3f16 2024 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 2025 r = link_put_carrier(link, carrier, &link->bound_to_links);
2026 if (r < 0)
2027 return r;
2028
2029 list_updated = true;
2030 }
2031 }
2032
2033 if (list_updated)
84de38c5 2034 link_dirty(link);
0d4ad91d
AR		 2035
2036 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2037 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2038 if (r < 0)
2039 return r;
2040
84de38c5 2041 link_dirty(carrier);
0d4ad91d
AR		 2042 }
2043
2044 return 0;
2045}
2046
2047static int link_new_carrier_maps(Link *link) {
2048 int r;
2049
2050 r = link_new_bound_by_list(link);
2051 if (r < 0)
2052 return r;
2053
2054 r = link_handle_bound_by_list(link);
2055 if (r < 0)
2056 return r;
2057
2058 r = link_new_bound_to_list(link);
2059 if (r < 0)
2060 return r;
2061
2062 r = link_handle_bound_to_list(link);
2063 if (r < 0)
2064 return r;
2065
2066 return 0;
2067}
2068
2069static void link_free_bound_to_list(Link *link) {
2070 Link *bound_to;
2071 Iterator i;
2072
2073 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2074 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2075
2076 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2077 link_dirty(bound_to);
0d4ad91d
AR		 2078 }
2079
2080 return;
2081}
2082
2083static void link_free_bound_by_list(Link *link) {
2084 Link *bound_by;
2085 Iterator i;
2086
2087 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2088 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2089
2090 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2091 link_dirty(bound_by);
0d4ad91d
AR		 2092 link_handle_bound_to_list(bound_by);
2093 }
2094 }
2095
2096 return;
2097}
2098
2099static void link_free_carrier_maps(Link *link) {
2100 bool list_updated = false;
2101
2102 assert(link);
2103
2104 if (!hashmap_isempty(link->bound_to_links)) {
2105 link_free_bound_to_list(link);
2106 list_updated = true;
2107 }
2108
2109 if (!hashmap_isempty(link->bound_by_links)) {
2110 link_free_bound_by_list(link);
2111 list_updated = true;
2112 }
2113
2114 if (list_updated)
84de38c5 2115 link_dirty(link);
0d4ad91d
AR		 2116
2117 return;
2118}
2119
5f707e12
YW		 2120static int link_append_to_master(Link *link, NetDev *netdev) {
2121 Link *master;
2122 int r;
2123
2124 assert(link);
2125 assert(netdev);
2126
2127 r = link_get(link->manager, netdev->ifindex, &master);
2128 if (r < 0)
2129 return r;
2130
de7fef4b 2131 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 2132 if (r <= 0)
5f707e12
YW		 2133 return r;
2134
2135 link_ref(link);
2136 return 0;
2137}
2138
2139static void link_drop_from_master(Link *link, NetDev *netdev) {
2140 Link *master;
2141
2142 assert(link);
2143
2144 if (!link->manager || !netdev)
2145 return;
2146
2147 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2148 return;
2149
2150 link_unref(set_remove(master->slaves, link));
2151}
2152
2153static void link_detach_from_manager(Link *link) {
2154 if (!link || !link->manager)
2155 return;
2156
2157 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2158 link_clean(link);
2159
2160 /* The following must be called at last. */
2161 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2162 link_unref(link);
2163}
2164
0d4ad91d
AR		 2165void link_drop(Link *link) {
2166 if (!link || link->state == LINK_STATE_LINGER)
2167 return;
2168
2169 link_set_state(link, LINK_STATE_LINGER);
2170
2171 link_free_carrier_maps(link);
2172
5f707e12
YW		 2173 if (link->network) {
2174 link_drop_from_master(link, link->network->bridge);
2175 link_drop_from_master(link, link->network->bond);
2176 }
2177
6a7a4e4d 2178 log_link_debug(link, "Link removed");
0d4ad91d 2179
db2f8a2e 2180 (void) unlink(link->state_file);
c4397d94 2181 link_detach_from_manager(link);
0d4ad91d
AR		 2182}
2183
3f265037 2184static int link_joined(Link *link) {
f882c247
TG		 2185 int r;
2186
ef1ba606 2187 assert(link);
f5be5601 2188 assert(link->network);
dd3efc09 2189
0d4ad91d
AR		 2190 if (!hashmap_isempty(link->bound_to_links)) {
2191 r = link_handle_bound_to_list(link);
2192 if (r < 0)
2193 return r;
2194 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2195 r = link_up(link);
2196 if (r < 0) {
2197 link_enter_failed(link);
2198 return r;
2199 }
ef1ba606 2200 }
f882c247 2201
9ed794a3 2202 if (link->network->bridge) {
e1853b00 2203 r = link_set_bridge(link);
6a7a4e4d
LP		 2204 if (r < 0)
2205 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 2206
2207 r = link_append_to_master(link, link->network->bridge);
2208 if (r < 0)
2209 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 2210 }
2211
eb64b435 2212 if (link->network->bond) {
7fcee284 2213 r = link_set_bond(link);
eb64b435
SS		 2214 if (r < 0)
2215 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2216
45e11abf 2217 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2218 if (r < 0)
2219 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2220 }
2221
ffff9abe
TJ		 2222 if (link->network->use_br_vlan &&
2223 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2224 r = link_set_bridge_vlan(link);
2225 if (r < 0)
2226 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2227 }
2228
c1835a42
RM		 2229 /* Skip setting up addresses until it gets carrier,
2230 or it would try to set addresses twice,
2231 which is bad for non-idempotent steps. */
dad2d78e 2232 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2233 return 0;
2234
b425c3ae 2235 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 2236 return link_request_set_addresses(link);
02b59d57
TG		 2237}
2238
302a796f 2239static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2240 int r;
2241
1746cf2a 2242 assert(link);
ef1ba606 2243 assert(link->network);
34bf3c00 2244 assert(link->enslaving > 0);
02b59d57 2245
313cefa1 2246 link->enslaving--;
52433f6b 2247
5da8149f 2248 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2249 return 1;
2250
1c4baffc 2251 r = sd_netlink_message_get_errno(m);
856f962c 2252 if (r < 0 && r != -EEXIST) {
5ecb131d 2253 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG		 2254 link_enter_failed(link);
2255 return 1;
4ff296b0
YW		 2256 }
2257
2258 log_link_debug(link, "Joined netdev");
02b59d57 2259
34bf3c00 2260 if (link->enslaving == 0) {
4ff296b0
YW		 2261 r = link_joined(link);
2262 if (r < 0)
2263 link_enter_failed(link);
34bf3c00 2264 }
02b59d57
TG		 2265
2266 return 1;
2267}
2268
3f265037 2269static int link_enter_join_netdev(Link *link) {
6a0a2f86 2270 NetDev *netdev;
672682a6 2271 Iterator i;
02b59d57
TG		 2272 int r;
2273
2274 assert(link);
2275 assert(link->network);
bd08ce56 2276 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2277
289e6774 2278 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2279
84de38c5 2280 link_dirty(link);
34bf3c00 2281 link->enslaving = 0;
02b59d57 2282
d9c67ea1 2283 if (link->network->bond) {
cbff7170
TJ		 2284 if (link->network->bond->state == NETDEV_STATE_READY &&
2285 link->network->bond->ifindex == link->master_ifindex)
2286 return link_joined(link);
2287
f2341e0a
LP		 2288 log_struct(LOG_DEBUG,
2289 LOG_LINK_INTERFACE(link),
2290 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2291 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2292
34bf3c00
YW		 2293 link->enslaving++;
2294
f2341e0a 2295 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2296 if (r < 0) {
f2341e0a
LP		 2297 log_struct_errno(LOG_WARNING, r,
2298 LOG_LINK_INTERFACE(link),
2299 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2300 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2301 link_enter_failed(link);
2302 return r;
2303 }
0ad6148e
MO		 2304 }
2305
d9c67ea1 2306 if (link->network->bridge) {
f2341e0a
LP		 2307 log_struct(LOG_DEBUG,
2308 LOG_LINK_INTERFACE(link),
2309 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2310 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2311
34bf3c00
YW		 2312 link->enslaving++;
2313
f2341e0a 2314 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2315 if (r < 0) {
f2341e0a
LP		 2316 log_struct_errno(LOG_WARNING, r,
2317 LOG_LINK_INTERFACE(link),
2318 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2319 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2320 link_enter_failed(link);
2321 return r;
2322 }
52433f6b
TG		 2323 }
2324
6cb955c6
AR		 2325 if (link->network->vrf) {
2326 log_struct(LOG_DEBUG,
2327 LOG_LINK_INTERFACE(link),
2328 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2329 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2330
34bf3c00
YW		 2331 link->enslaving++;
2332
6cb955c6
AR		 2333 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2334 if (r < 0) {
2335 log_struct_errno(LOG_WARNING, r,
2336 LOG_LINK_INTERFACE(link),
2337 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2338 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2339 link_enter_failed(link);
2340 return r;
2341 }
6cb955c6
AR		 2342 }
2343
6a0a2f86 2344 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2345
2b6db913
YW		 2346 if (netdev->ifindex > 0)
2347 /* Assume already enslaved. */
a63e5daa 2348 continue;
a63e5daa 2349
7033af49
YW		 2350 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2351 continue;
2352
f2341e0a
LP		 2353 log_struct(LOG_DEBUG,
2354 LOG_LINK_INTERFACE(link),
2355 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2356 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2357
34bf3c00
YW		 2358 link->enslaving++;
2359
f2341e0a 2360 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2361 if (r < 0) {
f2341e0a
LP		 2362 log_struct_errno(LOG_WARNING, r,
2363 LOG_LINK_INTERFACE(link),
2364 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2365 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2366 link_enter_failed(link);
2367 return r;
2368 }
326cb406
SS		 2369 }
2370
34bf3c00
YW		 2371 if (link->enslaving == 0)
2372 return link_joined(link);
2373
ef1ba606
TG		 2374 return 0;
2375}
2376
769d324c 2377static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2378 int r;
2379
765afd5c 2380 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2381 return 0;
2382
765afd5c
LP		 2383 /* We propagate the forwarding flag from one interface to the
2384 * global setting one way. This means: as long as at least one
2385 * interface was configured at any time that had IP forwarding
2386 * enabled the setting will stay on for good. We do this
2387 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2388 * somewhat in sync (see below). */
15dee3f0 2389
62e021a9 2390 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2391 if (r < 0)
765afd5c 2392 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2393
769d324c
LP		 2394 return 0;
2395}
2396
2397static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2398 int r;
2399
765afd5c 2400 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2401 return 0;
2402
61233823 2403 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2404 * packet forwarding setting: either packet forwarding is on
2405 * for all, or off for all. We hence don't bother with a
2406 * per-interface setting, but simply propagate the interface
2407 * flag, if it is set, to the global flag, one-way. Note that
2408 * while IPv4 would allow a per-interface flag, we expose the
2409 * same behaviour there and also propagate the setting from
2410 * one to all, to keep things simple (see above). */
15dee3f0 2411
62e021a9 2412 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2413 if (r < 0)
765afd5c 2414 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2415
2416 return 0;
2417}
2418
49092e22 2419static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2420 IPv6PrivacyExtensions s;
49092e22
SS		 2421 int r;
2422
1f0d9695 2423 s = link_ipv6_privacy_extensions(link);
66a6bd68 2424 if (s < 0)
49092e22
SS		 2425 return 0;
2426
62e021a9 2427 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2428 if (r < 0)
49092e22
SS		 2429 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2430
2431 return 0;
2432}
2433
4f2e437a 2434static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2435 int r;
2436
2437 /* Make this a NOP if IPv6 is not available */
2438 if (!socket_ipv6_is_supported())
2439 return 0;
2440
2441 if (link->flags & IFF_LOOPBACK)
2442 return 0;
2443
d68e2e59
LP		 2444 if (!link->network)
2445 return 0;
2446
62e021a9 2447 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2448 if (r < 0)
fe307276 2449 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2450
2451 return 0;
2452}
2453
8749cbcd 2454static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2455 int r;
2456
2457 /* Make this a NOP if IPv6 is not available */
2458 if (!socket_ipv6_is_supported())
2459 return 0;
2460
2461 if (link->flags & IFF_LOOPBACK)
2462 return 0;
2463
d68e2e59
LP		 2464 if (!link->network)
2465 return 0;
2466
8749cbcd
SS		 2467 if (link->network->ipv6_dad_transmits < 0)
2468 return 0;
2469
62e021a9 2470 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2471 if (r < 0)
8749cbcd 2472 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2473
2474 return 0;
2475}
2476
b69c3180 2477static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2478 int r;
2479
2480 /* Make this a NOP if IPv6 is not available */
2481 if (!socket_ipv6_is_supported())
2482 return 0;
2483
2484 if (link->flags & IFF_LOOPBACK)
2485 return 0;
2486
d68e2e59
LP		 2487 if (!link->network)
2488 return 0;
2489
b69c3180
SS		 2490 if (link->network->ipv6_hop_limit < 0)
2491 return 0;
2492
62e021a9 2493 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2494 if (r < 0)
b69c3180 2495 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2496
2497 return 0;
2498}
2499
11102cba 2500static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2501 int r;
2502
2503 /* Make this a NOP if IPv6 is not available */
2504 if (!socket_ipv6_is_supported())
2505 return 0;
2506
2507 if (link->flags & IFF_LOOPBACK)
2508 return 0;
2509
2510 if (link->network->ipv6_mtu == 0)
2511 return 0;
2512
d236718c
DS		 2513 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
2514 * on the interface. Bump up IPv6 MTU bytes to IPV6_MTU_MIN. */
2515 if (link->network->ipv6_mtu < IPV6_MIN_MTU) {
2516 log_link_notice(link, "Bumping IPv6 MTU to "STRINGIFY(IPV6_MIN_MTU)" byte minimum required");
2517 link->network->ipv6_mtu = IPV6_MIN_MTU;
2518 }
2519
62e021a9 2520 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
d236718c
DS		 2521 if (r < 0) {
2522 if (link->mtu < link->network->ipv6_mtu)
2523 log_link_warning(link, "Cannot set IPv6 MTU %"PRIu32" higher than device MTU %"PRIu32,
2524 link->network->ipv6_mtu, link->mtu);
2525 else
2526 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2527 }
2528
2529 link->ipv6_mtu_set = true;
11102cba
SS		 2530
2531 return 0;
2532}
2533
94d76d07
YW		 2534static int link_set_ipv4_accept_local(Link *link) {
2535 int r;
2536
2537 if (link->flags & IFF_LOOPBACK)
2538 return 0;
2539
2540 if (link->network->ipv4_accept_local < 0)
2541 return 0;
2542
2543 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "accept_local", link->network->ipv4_accept_local);
2544 if (r < 0)
2545 log_link_warning_errno(link, r, "Cannot set IPv4 accept_local flag for interface: %m");
2546
2547 return 0;
2548}
2549
30226d27
TJ		 2550static bool link_is_static_address_configured(Link *link, Address *address) {
2551 Address *net_address;
2552
2553 assert(link);
2554 assert(address);
2555
2556 if (!link->network)
2557 return false;
2558
2559 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2560 if (address_equal(net_address, address))
2561 return true;
2562
2563 return false;
2564}
2565
d1bdafd2
WKI		 2566static bool link_is_neighbor_configured(Link *link, Neighbor *neighbor) {
2567 Neighbor *net_neighbor;
2568
2569 assert(link);
2570 assert(neighbor);
2571
2572 if (!link->network)
2573 return false;
2574
2575 LIST_FOREACH(neighbors, net_neighbor, link->network->neighbors)
2576 if (neighbor_equal(net_neighbor, neighbor))
2577 return true;
2578
2579 return false;
2580}
2581
7ecf0c3e
TJ		 2582static bool link_is_static_route_configured(Link *link, Route *route) {
2583 Route *net_route;
2584
2585 assert(link);
2586 assert(route);
2587
2588 if (!link->network)
2589 return false;
2590
2591 LIST_FOREACH(routes, net_route, link->network->static_routes)
2592 if (route_equal(net_route, route))
2593 return true;
2594
2595 return false;
2596}
2597
db51778f
YW		 2598static bool link_address_is_dynamic(Link *link, Address *address) {
2599 Route *route;
2600 Iterator i;
2601
2602 assert(link);
2603 assert(address);
2604
2605 if (address->cinfo.ifa_prefered != CACHE_INFO_INFINITY_LIFE_TIME)
2606 return true;
2607
2608 /* Even when the address is leased from a DHCP server, networkd assign the address
2609 * without lifetime when KeepConfiguration=dhcp. So, let's check that we have
2610 * corresponding routes with RTPROT_DHCP. */
2611 SET_FOREACH(route, link->routes_foreign, i) {
2612 if (route->protocol != RTPROT_DHCP)
2613 continue;
2614
2615 if (address->family != route->family)
2616 continue;
2617
2618 if (in_addr_equal(address->family, &address->in_addr, &route->prefsrc))
2619 return true;
2620 }
2621
2622 return false;
2623}
2624
0917a271
DS		 2625static int link_enumerate_ipv6_tentative_addresses(Link *link) {
2626 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
2627 sd_netlink_message *addr;
2628 int r;
2629
2630 assert(link);
2631 assert(link->manager);
2632 assert(link->manager->rtnl);
2633
2634 r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_GETADDR, 0, AF_INET6);
2635 if (r < 0)
2636 return r;
2637
2638 r = sd_netlink_call(link->manager->rtnl, req, 0, &reply);
2639 if (r < 0)
2640 return r;
2641
2642 for (addr = reply; addr; addr = sd_netlink_message_next(addr)) {
2643 unsigned char flags;
2644 int ifindex;
2645
2646 r = sd_rtnl_message_addr_get_ifindex(addr, &ifindex);
2647 if (r < 0) {
2648 log_link_warning_errno(link, r, "rtnl: invalid ifindex, ignoring: %m");
2649 continue;
2650 } else if (link->ifindex != ifindex)
2651 continue;
2652
2653 r = sd_rtnl_message_addr_get_flags(addr, &flags);
2654 if (r < 0) {
2655 log_link_warning_errno(link, r, "rtnl: received address message with invalid flags, ignoring: %m");
2656 continue;
2657 } else if (!(flags & IFA_F_TENTATIVE))
2658 continue;
2659
2660 log_link_debug(link, "Found tentative ipv6 link-local address");
2661 (void) manager_rtnl_process_address(link->manager->rtnl, addr, link->manager);
2662 }
2663
2664 return 0;
2665}
2666
5e5b137a
TG		 2667static int link_drop_foreign_config(Link *link) {
2668 Address *address;
d1bdafd2 2669 Neighbor *neighbor;
5e5b137a
TG		 2670 Route *route;
2671 Iterator i;
2672 int r;
2673
0917a271
DS		 2674 /* The kernel doesn't notify us about tentative addresses;
2675 * so if ipv6ll is disabled, we need to enumerate them now so we can drop them below */
2676 if (!link_ipv6ll_enabled(link)) {
2677 r = link_enumerate_ipv6_tentative_addresses(link);
2678 if (r < 0)
2679 return r;
2680 }
2681
5e5b137a 2682 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2683 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2684 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
5e5b137a
TG		 2685 continue;
2686
db51778f 2687 if (link_address_is_dynamic(link, address)) {
b1b0b42e 2688 if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
db51778f 2689 continue;
b1b0b42e 2690 } else if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
db51778f
YW		 2691 continue;
2692
30226d27
TJ		 2693 if (link_is_static_address_configured(link, address)) {
2694 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2695 if (r < 0)
2696 return log_link_error_errno(link, r, "Failed to add address: %m");
2697 } else {
63ae0569 2698 r = address_remove(address, link, NULL);
30226d27
TJ		 2699 if (r < 0)
2700 return r;
2701 }
5e5b137a
TG		 2702 }
2703
d1bdafd2
WKI		 2704 SET_FOREACH(neighbor, link->neighbors_foreign, i) {
2705 if (link_is_neighbor_configured(link, neighbor)) {
2706 r = neighbor_add(link, neighbor->family, &neighbor->in_addr, &neighbor->lladdr, neighbor->lladdr_size, NULL);
2707 if (r < 0)
2708 return r;
2709 } else {
2710 r = neighbor_remove(neighbor, link, NULL);
2711 if (r < 0)
2712 return r;
2713 }
2714 }
2715
5e5b137a 2716 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2717 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2718 if (route->protocol == RTPROT_KERNEL)
2719 continue;
2720
bd7d6cec
YW		 2721 /* do not touch multicast route added by kernel */
2722 /* FIXME: Why the kernel adds this route with protocol RTPROT_BOOT??? We need to investigate that.
2723 * https://tools.ietf.org/html/rfc4862#section-5.4 may explain why. */
2724 if (route->protocol == RTPROT_BOOT &&
2725 route->family == AF_INET6 &&
2726 route->dst_prefixlen == 8 &&
2727 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 }}} }))
2728 continue;
2729
b1b0b42e 2730 if (route->protocol == RTPROT_STATIC && link->network &&
db51778f
YW		 2731 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2732 continue;
2733
b1b0b42e 2734 if (route->protocol == RTPROT_DHCP && link->network &&
db51778f
YW		 2735 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2736 continue;
2737
7ecf0c3e 2738 if (link_is_static_route_configured(link, route)) {
f1368755 2739 r = route_add(link, route, NULL);
7ecf0c3e
TJ		 2740 if (r < 0)
2741 return r;
2742 } else {
4645ad47 2743 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2744 if (r < 0)
2745 return r;
2746 }
5e5b137a
TG		 2747 }
2748
2749 return 0;
2750}
2751
3104883d 2752static int link_drop_config(Link *link) {
410a7f15 2753 Address *address, *pool_address;
d1bdafd2 2754 Neighbor *neighbor;
3104883d
SS		 2755 Route *route;
2756 Iterator i;
2757 int r;
2758
2759 SET_FOREACH(address, link->addresses, i) {
2760 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2761 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
3104883d
SS		 2762 continue;
2763
63ae0569 2764 r = address_remove(address, link, NULL);
3104883d
SS		 2765 if (r < 0)
2766 return r;
410a7f15
RM		 2767
2768 /* If this address came from an address pool, clean up the pool */
2769 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2770 if (address_equal(address, pool_address)) {
2771 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2772 address_free(pool_address);
2773 break;
2774 }
2775 }
3104883d
SS		 2776 }
2777
d1bdafd2
WKI		 2778 SET_FOREACH(neighbor, link->neighbors, i) {
2779 r = neighbor_remove(neighbor, link, NULL);
2780 if (r < 0)
2781 return r;
2782 }
2783
3104883d
SS		 2784 SET_FOREACH(route, link->routes, i) {
2785 /* do not touch routes managed by the kernel */
2786 if (route->protocol == RTPROT_KERNEL)
2787 continue;
2788
4645ad47 2789 r = route_remove(route, link, NULL);
3104883d
SS		 2790 if (r < 0)
2791 return r;
2792 }
2793
c69305ff
LP		 2794 ndisc_flush(link);
2795
3104883d
SS		 2796 return 0;
2797}
2798
051e77ca
SS		 2799static int link_configure_ipv4_dad(Link *link) {
2800 Address *address;
2801 int r;
2802
2803 assert(link);
2804 assert(link->network);
2805
2806 LIST_FOREACH(addresses, address, link->network->static_addresses)
2807 if (address->family == AF_INET &&
2808 FLAGS_SET(address->duplicate_address_detection, ADDRESS_FAMILY_IPV4)) {
2809 r = configure_ipv4_duplicate_address_detection(link, address);
2810 if (r < 0)
2811 return log_link_error_errno(link, r, "Failed to configure IPv4ACD: %m");
2812 }
2813
2814 return 0;
2815}
2816
34658df2
YW		 2817static int link_configure_traffic_control(Link *link) {
2818 TrafficControl *tc;
0f5bd7fe 2819 Iterator i;
02b59d57
TG		 2820 int r;
2821
34658df2
YW		 2822 link->tc_configured = false;
2823 link->tc_messages = 0;
4ecdcb07 2824
34658df2
YW		 2825 ORDERED_HASHMAP_FOREACH(tc, link->network->tc_by_section, i) {
2826 r = traffic_control_configure(link, tc);
4ecdcb07
YW		 2827 if (r < 0)
2828 return r;
2829 }
2830
34658df2
YW		 2831 if (link->tc_messages == 0)
2832 link->tc_configured = true;
4ecdcb07 2833 else
34658df2 2834 log_link_debug(link, "Configuring traffic control");
4ecdcb07
YW		 2835
2836 return 0;
2837}
2838
2839static int link_configure(Link *link) {
2840 int r;
2841
ef1ba606 2842 assert(link);
b22d8a00 2843 assert(link->network);
bd08ce56 2844 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2845
34658df2 2846 r = link_configure_traffic_control(link);
4ecdcb07
YW		 2847 if (r < 0)
2848 return r;
2849
500b96eb 2850 if (link->iftype == ARPHRD_CAN)
93ea7750 2851 return link_configure_can(link);
92c918b0 2852
482efedc
SS		 2853 /* If IPv6 configured that is static IPv6 address and IPv6LL autoconfiguration is enabled
2854 * for this interface, then enable IPv6 */
57ad7607 2855 (void) link_update_ipv6_sysctl(link);
482efedc 2856
23d8b221
SS		 2857 r = link_set_proxy_arp(link);
2858 if (r < 0)
2859 return r;
2860
a0e5c15d
FK		 2861 r = ipv6_proxy_ndp_addresses_configure(link);
2862 if (r < 0)
2863 return r;
2864
769d324c
LP		 2865 r = link_set_ipv4_forward(link);
2866 if (r < 0)
2867 return r;
2868
2869 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2870 if (r < 0)
2871 return r;
2872
49092e22
SS		 2873 r = link_set_ipv6_privacy_extensions(link);
2874 if (r < 0)
2875 return r;
2876
4f2e437a
SS		 2877 r = link_set_ipv6_accept_ra(link);
2878 if (r < 0)
2879 return r;
2880
8749cbcd
SS		 2881 r = link_set_ipv6_dad_transmits(link);
2882 if (r < 0)
2883 return r;
b69c3180
SS		 2884
2885 r = link_set_ipv6_hop_limit(link);
2886 if (r < 0)
2887 return r;
8749cbcd 2888
94d76d07
YW		 2889 r = link_set_ipv4_accept_local(link);
2890 if (r < 0)
2891 return r;
2892
99d2baa2
SS		 2893 r = link_set_flags(link);
2894 if (r < 0)
2895 return r;
2896
89fe6535
SS		 2897 r = link_set_group(link);
2898 if (r < 0)
2899 return r;
2900
910feb78 2901 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
b22d8a00 2902 r = ipv4ll_configure(link);
eb34d4af
TG		 2903 if (r < 0)
2904 return r;
2905 }
2906
78c958f8 2907 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2908 r = dhcp4_set_promote_secondaries(link);
2909 if (r < 0)
2910 return r;
2911
3c9b8860 2912 r = dhcp4_configure(link);
eb34d4af
TG		 2913 if (r < 0)
2914 return r;
eb34d4af
TG		 2915 }
2916
78c958f8 2917 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2918 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2919 if (r < 0)
2920 return r;
2921
2922 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2923 if (r < 0)
2924 return r;
dd43110f
TG		 2925 }
2926
62379e88
TG		 2927 if (link_dhcp6_enabled(link) ||
2928 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2929 r = dhcp6_configure(link);
2930 if (r < 0)
2931 return r;
2932 }
2933
2934 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2935 r = ndisc_configure(link);
4138fb2c
PF		 2936 if (r < 0)
2937 return r;
2938 }
2939
7465dd22
PF		 2940 if (link_radv_enabled(link)) {
2941 r = radv_configure(link);
2942 if (r < 0)
2943 return r;
2944 }
2945
8e1ad1ea 2946 if (link_lldp_rx_enabled(link)) {
7f853950 2947 r = link_lldp_rx_configure(link);
273eec24
LP		 2948 if (r < 0)
2949 return r;
ce43e484
SS		 2950 }
2951
f6fcc1c2 2952 r = link_configure_mtu(link);
40288ece
YW		 2953 if (r < 0)
2954 return r;
44b598a1 2955
9f6e82e6
YW		 2956 r = link_configure_addrgen_mode(link);
2957 if (r < 0)
2958 return r;
0e2fdb83 2959
051e77ca
SS		 2960 r = link_configure_ipv4_dad(link);
2961 if (r < 0)
2962 return r;
2963
3a390124
DS		 2964 return link_configure_continue(link);
2965}
2966
2967/* The configuration continues in this separate function, instead of
2968 * including this in the above link_configure() function, for two
2969 * reasons:
2970 * 1) some devices reset the link when the mtu is set, which caused
2971 * an infinite loop here in networkd; see:
2972 * https://github.com/systemd/systemd/issues/6593
2973 * https://github.com/systemd/systemd/issues/9831
2974 * 2) if ipv6ll is disabled, then bringing the interface up must be
2975 * delayed until after we get confirmation from the kernel that
2976 * the addr_gen_mode parameter has been set (via netlink), see:
2977 * https://github.com/systemd/systemd/issues/13882
2978 */
2979static int link_configure_continue(Link *link) {
55dc8c4a
YW		 2980 int r;
2981
2982 assert(link);
2983 assert(link->network);
bd08ce56 2984 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a 2985
9524014e 2986 if (link->setting_mtu || link->setting_genmode)
55dc8c4a
YW		 2987 return 0;
2988
4c649652
DS		 2989 /* Drop foreign config, but ignore loopback or critical devices.
2990 * We do not want to remove loopback address or addresses used for root NFS. */
2991 if (!(link->flags & IFF_LOOPBACK) &&
2992 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
2993 r = link_drop_foreign_config(link);
2994 if (r < 0)
2995 return r;
2996 }
2997
d236718c
DS		 2998 /* The kernel resets ipv6 mtu after changing device mtu;
2999 * we must set this here, after we've set device mtu */
3000 r = link_set_ipv6_mtu(link);
3001 if (r < 0)
3002 return r;
3003
dad2d78e 3004 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 3005 r = link_acquire_conf(link);
3006 if (r < 0)
3007 return r;
cc544d5f 3008 }
1e9be60b 3009
3f265037 3010 return link_enter_join_netdev(link);
505f8da7
TG		 3011}
3012
27dfc982
YW		 3013static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
3014 assert(duid);
3015
3016 if (duid->raw_data_len > 0)
3017 return 0;
3018
3019 if (duid->type != DUID_TYPE_UUID)
3020 return -EINVAL;
3021
3022 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
3023 duid->raw_data_len = sizeof(sd_id128_t);
3024
3025 return 1;
3026}
3027
3028int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
3029 Manager *manager = userdata;
3030 const sd_bus_error *e;
3031 const void *a;
3032 size_t sz;
3033 DUID *duid;
3034 Link *link;
3035 int r;
3036
3037 assert(m);
3038 assert(manager);
3039
3040 e = sd_bus_message_get_error(m);
3041 if (e) {
3042 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 3043 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 3044 e->message);
3045 goto configure;
3046 }
3047
3048 r = sd_bus_message_read_array(m, 'y', &a, &sz);
3049 if (r < 0)
3050 goto configure;
3051
3052 if (sz != sizeof(sd_id128_t)) {
ab4dd984 3053 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 3054 goto configure;
3055 }
3056
3057 memcpy(&manager->product_uuid, a, sz);
3058 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
3059 (void) duid_set_uuid(duid, manager->product_uuid);
3060
3061 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
3062
3063configure:
3064 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3dc2e7af
YW		 3065 link_unref(link);
3066
27dfc982
YW		 3067 r = link_configure(link);
3068 if (r < 0)
4ff296b0 3069 link_enter_failed(link);
27dfc982
YW		 3070 }
3071
3072 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
3073
3074 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
3075 * even if the method fails. */
3076 manager->has_product_uuid = true;
3077
3078 return 1;
3079}
3080
3081static bool link_requires_uuid(Link *link) {
3082 const DUID *duid;
3083
3084 assert(link);
3085 assert(link->manager);
3086 assert(link->network);
3087
3088 duid = link_get_duid(link);
3089 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
3090 return false;
3091
3092 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
3093 return true;
3094
3095 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
3096 return true;
3097
3098 return false;
3099}
3100
3101static int link_configure_duid(Link *link) {
3102 Manager *m;
3103 DUID *duid;
3104 int r;
3105
3106 assert(link);
3107 assert(link->manager);
3108 assert(link->network);
3109
3110 m = link->manager;
3111 duid = link_get_duid(link);
3112
3113 if (!link_requires_uuid(link))
3114 return 1;
3115
3116 if (m->has_product_uuid) {
3117 (void) duid_set_uuid(duid, m->product_uuid);
3118 return 1;
3119 }
3120
3121 if (!m->links_requesting_uuid) {
3122 r = manager_request_product_uuid(m, link);
3123 if (r < 0) {
3124 if (r == -ENOMEM)
3125 return r;
3126
ab4dd984
ZJS		 3127 log_link_warning_errno(link, r,
3128 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 3129 return 1;
3130 }
3131 } else {
3132 r = set_put(m->links_requesting_uuid, link);
3133 if (r < 0)
3134 return log_oom();
39dbd0c7
ZJS		 3135 if (r > 0)
3136 link_ref(link);
27dfc982
YW		 3137
3138 r = set_put(m->duids_requesting_uuid, duid);
3139 if (r < 0)
3140 return log_oom();
3141 }
3142
3143 return 0;
3144}
3145
572b21d9 3146static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
ad932b15
YW		 3147 Network *network;
3148 int r;
3149
572b21d9
YW		 3150 if (m) {
3151 _cleanup_strv_free_ char **s = NULL;
3152
3153 r = sd_netlink_message_get_errno(m);
3154 if (r < 0)
3155 return r;
3156
3157 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3158 if (r < 0 && r != -ENODATA)
3159 return r;
3160
3161 strv_free_and_replace(link->alternative_names, s);
3162 }
3163
c643bda5
YW		 3164 r = network_get(link->manager, link->iftype, link->sd_device,
3165 link->ifname, link->alternative_names, link->driver,
3166 &link->mac, &link->permanent_mac,
3167 link->wlan_iftype, link->ssid, &link->bssid, &network);
ad932b15
YW		 3168 if (r == -ENOENT) {
3169 link_enter_unmanaged(link);
3170 return 0;
3171 } else if (r == 0 && network->unmanaged) {
3172 link_enter_unmanaged(link);
3173 return 0;
3174 } else if (r < 0)
3175 return r;
3176
99b8517c 3177 if (link->network == network && !force)
ad932b15
YW		 3178 return 0;
3179
3180 log_link_info(link, "Re-configuring with %s", network->filename);
3181
3182 /* Dropping old .network file */
3183 r = link_stop_clients(link, false);
572b21d9 3184 if (r < 0)
ad932b15 3185 return r;
ad932b15
YW		 3186
3187 if (link_dhcp4_server_enabled(link))
3188 (void) sd_dhcp_server_stop(link->dhcp_server);
3189
3190 r = link_drop_config(link);
3191 if (r < 0)
3192 return r;
3193
2c7b826d 3194 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
ad932b15
YW		 3195 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
3196 r = link_drop_foreign_config(link);
3197 if (r < 0)
3198 return r;
3199 }
3200
3201 link_free_carrier_maps(link);
3202 link_free_engines(link);
3203 link->network = network_unref(link->network);
3204
3205 /* Then, apply new .network file */
3206 r = network_apply(network, link);
3207 if (r < 0)
3208 return r;
3209
3210 r = link_new_carrier_maps(link);
3211 if (r < 0)
3212 return r;
3213
3214 link_set_state(link, LINK_STATE_INITIALIZED);
8ae7b8a1 3215 link_dirty(link);
ad932b15
YW		 3216
3217 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3218 * link_configure() is called later asynchronously. */
3219 r = link_configure_duid(link);
3220 if (r <= 0)
3221 return r;
3222
3223 r = link_configure(link);
3224 if (r < 0)
3225 return r;
3226
3227 return 0;
3228}
3229
572b21d9
YW		 3230static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3231 int r;
3232
3233 r = link_reconfigure_internal(link, m, false);
3234 if (r < 0)
3235 link_enter_failed(link);
3236
3237 return 1;
3238}
3239
3240static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3241 int r;
3242
3243 r = link_reconfigure_internal(link, m, true);
3244 if (r < 0)
3245 link_enter_failed(link);
3246
3247 return 1;
3248}
3249
3250int link_reconfigure(Link *link, bool force) {
3251 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
3252 int r;
3253
2c0d7ed3
YW		 3254 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
3255 return 0;
3256
572b21d9
YW		 3257 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3258 link->ifindex);
3259 if (r < 0)
3260 return r;
3261
3262 r = netlink_call_async(link->manager->rtnl, NULL, req,
3263 force ? link_force_reconfigure_handler : link_reconfigure_handler,
3264 link_netlink_destroy_callback, link);
3265 if (r < 0)
3266 return r;
3267
3268 link_ref(link);
3269
3270 return 0;
3271}
3272
e6bf7774 3273static int link_initialized_and_synced(Link *link) {
505f8da7 3274 Network *network;
505f8da7
TG		 3275 int r;
3276
3277 assert(link);
3278 assert(link->ifname);
3279 assert(link->manager);
3280
bd08ce56
YW		 3281 /* We may get called either from the asynchronous netlink callback,
3282 * or directly for link_add() if running in a container. See link_add(). */
3283 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 3284 return 0;
505f8da7 3285
6a7a4e4d 3286 log_link_debug(link, "Link state is up-to-date");
bd08ce56 3287 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 3288
0d4ad91d
AR		 3289 r = link_new_bound_by_list(link);
3290 if (r < 0)
3291 return r;
3292
3293 r = link_handle_bound_by_list(link);
3294 if (r < 0)
3295 return r;
3296
c4a03a56 3297 if (!link->network) {
0894cfe4 3298 r = wifi_get_info(link);
8d968fdd
YW		 3299 if (r < 0)
3300 return r;
3301
c643bda5
YW		 3302 r = network_get(link->manager, link->iftype, link->sd_device,
3303 link->ifname, link->alternative_names, link->driver,
3304 &link->mac, &link->permanent_mac,
3305 link->wlan_iftype, link->ssid, &link->bssid, &network);
c4a03a56
TG		 3306 if (r == -ENOENT) {
3307 link_enter_unmanaged(link);
4232cf04 3308 return 0;
a09dc546
DM		 3309 } else if (r == 0 && network->unmanaged) {
3310 link_enter_unmanaged(link);
3311 return 0;
c4a03a56
TG		 3312 } else if (r < 0)
3313 return r;
505f8da7 3314
c4a03a56
TG		 3315 if (link->flags & IFF_LOOPBACK) {
3316 if (network->link_local != ADDRESS_FAMILY_NO)
3317 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3318
c4a03a56
TG		 3319 if (network->dhcp != ADDRESS_FAMILY_NO)
3320 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3321
c4a03a56
TG		 3322 if (network->dhcp_server)
3323 log_link_debug(link, "Ignoring DHCP server for loopback link");
3324 }
bd2efe92 3325
7d342c03 3326 r = network_apply(network, link);
c4a03a56
TG		 3327 if (r < 0)
3328 return r;
3329 }
505f8da7 3330
0d4ad91d
AR		 3331 r = link_new_bound_to_list(link);
3332 if (r < 0)
3333 return r;
3334
27dfc982
YW		 3335 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3336 * link_configure() is called later asynchronously. */
3337 r = link_configure_duid(link);
3338 if (r <= 0)
3339 return r;
3340
a748b692
TG		 3341 r = link_configure(link);
3342 if (r < 0)
3343 return r;
3344
4232cf04 3345 return 0;
505f8da7
TG		 3346}
3347
302a796f 3348static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
572b21d9 3349 _cleanup_strv_free_ char **s = NULL;
4ff296b0
YW		 3350 int r;
3351
572b21d9
YW		 3352 r = sd_netlink_message_get_errno(m);
3353 if (r < 0) {
40681e5c 3354 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 3355 link_enter_failed(link);
3356 return 0;
3357 }
3358
3359 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3360 if (r < 0 && r != -ENODATA) {
3361 link_enter_failed(link);
3362 return 0;
3363 }
3364
3365 strv_free_and_replace(link->alternative_names, s);
3366
4ff296b0
YW		 3367 r = link_initialized_and_synced(link);
3368 if (r < 0)
3369 link_enter_failed(link);
e6bf7774
YW		 3370 return 1;
3371}
3372
51517f9e 3373int link_initialized(Link *link, sd_device *device) {
4afd3348 3374 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3375 int r;
3376
3377 assert(link);
3378 assert(link->manager);
3379 assert(link->manager->rtnl);
3380 assert(device);
3381
8434fd5c 3382 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3383 return 0;
3384
51517f9e 3385 if (link->sd_device)
679b3605
TG		 3386 return 0;
3387
79008bdd 3388 log_link_debug(link, "udev initialized link");
bd08ce56 3389 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 3390
51517f9e 3391 link->sd_device = sd_device_ref(device);
4f561e8e 3392
3c9b8860
TG		 3393 /* udev has initialized the link, but we don't know if we have yet
3394 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3395 * when it returns we know that the pending NEWLINKs have already been
3396 * processed and that we are up-to-date */
4f561e8e 3397
3c9b8860
TG		 3398 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3399 link->ifindex);
4f561e8e
TG		 3400 if (r < 0)
3401 return r;
3402
302a796f
YW		 3403 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3404 link_netlink_destroy_callback, link);
4f561e8e
TG		 3405 if (r < 0)
3406 return r;
3407
5da8149f
TG		 3408 link_ref(link);
3409
4f561e8e
TG		 3410 return 0;
3411}
3412
c4a03a56 3413static int link_load(Link *link) {
0bc70f1d
TG		 3414 _cleanup_free_ char *network_file = NULL,
3415 *addresses = NULL,
f703cc2c 3416 *routes = NULL,
0bc70f1d
TG		 3417 *dhcp4_address = NULL,
3418 *ipv4ll_address = NULL;
3419 union in_addr_union address;
c598ac76 3420 const char *p;
c4a03a56
TG		 3421 int r;
3422
3423 assert(link);
3424
aa8fbc74 3425 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3426 "NETWORK_FILE", &network_file,
3427 "ADDRESSES", &addresses,
f703cc2c 3428 "ROUTES", &routes,
0bc70f1d 3429 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3430 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3431 if (r < 0 && r != -ENOENT)
3432 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3433
3434 if (network_file) {
3435 Network *network;
3436 char *suffix;
3437
3438 /* drop suffix */
3439 suffix = strrchr(network_file, '.');
3440 if (!suffix) {
3441 log_link_debug(link, "Failed to get network name from %s", network_file);
3442 goto network_file_fail;
3443 }
3444 *suffix = '\0';
3445
3446 r = network_get_by_name(link->manager, basename(network_file), &network);
3447 if (r < 0) {
3448 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3449 goto network_file_fail;
3450 }
3451
7d342c03 3452 r = network_apply(network, link);
c4a03a56
TG		 3453 if (r < 0)
3454 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3455 }
3456
3457network_file_fail:
3458
3459 if (addresses) {
c598ac76 3460 p = addresses;
c4a03a56 3461
c598ac76
TG		 3462 for (;;) {
3463 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3464 char *prefixlen_str;
3465 int family;
3466 unsigned char prefixlen;
c4a03a56 3467
c598ac76
TG		 3468 r = extract_first_word(&p, &address_str, NULL, 0);
3469 if (r < 0) {
3470 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3471 continue;
928bc597
TA		 3472 }
3473 if (r == 0)
c598ac76
TG		 3474 break;
3475
3476 prefixlen_str = strchr(address_str, '/');
c4a03a56 3477 if (!prefixlen_str) {
c598ac76 3478 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3479 continue;
3480 }
3481
313cefa1 3482 *prefixlen_str++ = '\0';
c4a03a56
TG		 3483
3484 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3485 if (r != 1) {
3486 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3487 continue;
3488 }
3489
c598ac76 3490 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3491 if (r < 0) {
c598ac76 3492 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3493 continue;
3494 }
3495
3496 r = address_add(link, family, &address, prefixlen, NULL);
3497 if (r < 0)
3498 return log_link_error_errno(link, r, "Failed to add address: %m");
3499 }
3500 }
3501
f703cc2c 3502 if (routes) {
74544b4e
TA		 3503 p = routes;
3504
c598ac76 3505 for (;;) {
4afd3348 3506 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f1368755
YW		 3507 _cleanup_(route_freep) Route *tmp = NULL;
3508 _cleanup_free_ char *route_str = NULL;
f703cc2c 3509 char *prefixlen_str;
f1368755 3510 Route *route;
f703cc2c 3511
c598ac76
TG		 3512 r = extract_first_word(&p, &route_str, NULL, 0);
3513 if (r < 0) {
3514 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3515 continue;
928bc597
TA		 3516 }
3517 if (r == 0)
c598ac76
TG		 3518 break;
3519
3520 prefixlen_str = strchr(route_str, '/');
f703cc2c 3521 if (!prefixlen_str) {
c598ac76 3522 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3523 continue;
3524 }
3525
313cefa1 3526 *prefixlen_str++ = '\0';
f703cc2c 3527
f1368755
YW		 3528 r = route_new(&tmp);
3529 if (r < 0)
3530 return log_oom();
3531
3532 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%"PRIu32"/"USEC_FMT, &tmp->dst_prefixlen, &tmp->tos, &tmp->priority, &tmp->table, &tmp->lifetime);
f833694d
TG		 3533 if (r != 5) {
3534 log_link_debug(link,
3535 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3536 prefixlen_str);
f703cc2c
TG		 3537 continue;
3538 }
3539
f1368755 3540 r = in_addr_from_string_auto(route_str, &tmp->family, &tmp->dst);
f703cc2c 3541 if (r < 0) {
c598ac76 3542 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3543 continue;
3544 }
3545
f1368755 3546 r = route_add(link, tmp, &route);
f703cc2c
TG		 3547 if (r < 0)
3548 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3549
f1368755
YW		 3550 if (route->lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
3551 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), route->lifetime,
f833694d
TG		 3552 0, route_expire_handler, route);
3553 if (r < 0)
3554 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3555 }
3556
f833694d 3557 sd_event_source_unref(route->expire);
1cc6c93a 3558 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3559 }
3560 }
3561
0bc70f1d
TG		 3562 if (dhcp4_address) {
3563 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3564 if (r < 0) {
b68d26b8 3565 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3566 goto dhcp4_address_fail;
3567 }
3568
b1c626f6 3569 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3570 if (r < 0)
b68d26b8 3571 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d 3572
1b43e246
DS		 3573 r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0);
3574 if (r < 0)
3575 return log_link_error_errno(link, r, "Failed to attach DHCPv4 event: %m");
3576
0bc70f1d
TG		 3577 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3578 if (r < 0)
b68d26b8 3579 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3580 }
3581
3582dhcp4_address_fail:
3583
3584 if (ipv4ll_address) {
3585 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3586 if (r < 0) {
b68d26b8 3587 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3588 goto ipv4ll_address_fail;
3589 }
3590
3591 r = sd_ipv4ll_new(&link->ipv4ll);
3592 if (r < 0)
b68d26b8 3593 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d 3594
1b43e246
DS		 3595 r = sd_ipv4ll_attach_event(link->ipv4ll, NULL, 0);
3596 if (r < 0)
3597 return log_link_error_errno(link, r, "Failed to attach IPv4LL event: %m");
3598
0bc70f1d
TG		 3599 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3600 if (r < 0)
b68d26b8 3601 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3602 }
3603
3604ipv4ll_address_fail:
3605
c4a03a56
TG		 3606 return 0;
3607}
3608
1c4baffc 3609int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3610 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3611 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3612 Link *link;
5a937ea2 3613 int r;
505f8da7
TG		 3614
3615 assert(m);
fbbeb65a 3616 assert(m->rtnl);
505f8da7
TG		 3617 assert(message);
3618 assert(ret);
3619
3620 r = link_new(m, message, ret);
3621 if (r < 0)
3622 return r;
3623
3624 link = *ret;
3625
6a7a4e4d 3626 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3627
c4a03a56
TG		 3628 r = link_load(link);
3629 if (r < 0)
3630 return r;
3631
bf331d87
YW		 3632 if (path_is_read_only_fs("/sys") <= 0) {
3633 /* udev should be around */
ae06ab10 3634 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3635 r = sd_device_new_from_device_id(&device, ifindex_str);
3636 if (r < 0) {
4d59e14f
YW		 3637 log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m");
3638 return 0;
5c416fc4 3639 }
505f8da7 3640
5a937ea2 3641 r = sd_device_get_is_initialized(device);
51517f9e 3642 if (r < 0) {
bf331d87 3643 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 3644 goto failed;
3645 }
5a937ea2 3646 if (r == 0) {
505f8da7 3647 /* not yet ready */
79008bdd 3648 log_link_debug(link, "link pending udev initialization...");
505f8da7 3649 return 0;
3c4cb064 3650 }
505f8da7 3651
299ad32d
YW		 3652 r = device_is_renaming(device);
3653 if (r < 0) {
bf331d87 3654 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 3655 goto failed;
3656 }
3657 if (r > 0) {
bf331d87 3658 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 3659 return 0;
3660 }
3661
4f561e8e
TG		 3662 r = link_initialized(link, device);
3663 if (r < 0)
5c416fc4 3664 goto failed;
4f561e8e 3665 } else {
e6bf7774 3666 r = link_initialized_and_synced(link);
4f561e8e 3667 if (r < 0)
5c416fc4 3668 goto failed;
4f561e8e 3669 }
505f8da7 3670
a748b692 3671 return 0;
5c416fc4
TG		 3672failed:
3673 link_enter_failed(link);
3674 return r;
a748b692
TG		 3675}
3676
c601ebf7 3677int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3678 int r;
3679
3680 assert(link);
3681
3682 log_link_info(link, "Gained IPv6LL");
3683
c601ebf7 3684 link->ipv6ll_address = *address;
e7ab854c
TG		 3685 link_check_ready(link);
3686
b9ea3d2e 3687 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3688 r = link_acquire_ipv6_conf(link);
3689 if (r < 0) {
3690 link_enter_failed(link);
3691 return r;
3692 }
3693 }
3694
3695 return 0;
3696}
3697
9c0a72f9
TG		 3698static int link_carrier_gained(Link *link) {
3699 int r;
3700
3701 assert(link);
3702
0894cfe4 3703 r = wifi_get_info(link);
8d968fdd
YW		 3704 if (r < 0)
3705 return r;
3706 if (r > 0) {
572b21d9
YW		 3707 r = link_reconfigure_internal(link, NULL, false);
3708 if (r < 0) {
3709 link_enter_failed(link);
8d968fdd 3710 return r;
572b21d9 3711 }
8d968fdd
YW		 3712 }
3713
b9ea3d2e 3714 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3715 r = link_acquire_conf(link);
3716 if (r < 0) {
3717 link_enter_failed(link);
3718 return r;
3719 }
6fc25497 3720
b425c3ae 3721 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 3722 r = link_request_set_addresses(link);
6fc25497
SS		 3723 if (r < 0)
3724 return r;
9c0a72f9
TG		 3725 }
3726
0d4ad91d
AR		 3727 r = link_handle_bound_by_list(link);
3728 if (r < 0)
3729 return r;
3730
9c0a72f9
TG		 3731 return 0;
3732}
3733
3734static int link_carrier_lost(Link *link) {
3735 int r;
3736
3737 assert(link);
3738
25e992ba 3739 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3740 return 0;
3741
fbdb6605 3742 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3743 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3744 * configuration and stop the clients as well. */
97e7fb39
SS		 3745 if (link->setting_mtu)
3746 return 0;
3747
95355a28 3748 r = link_stop_clients(link, false);
9c0a72f9
TG		 3749 if (r < 0) {
3750 link_enter_failed(link);
3751 return r;
3752 }
3753
28464ae0
SS		 3754 if (link_dhcp4_server_enabled(link))
3755 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3756
3104883d
SS		 3757 r = link_drop_config(link);
3758 if (r < 0)
3759 return r;
3760
2c7b826d 3761 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
f258e948 3762 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3763 r = link_drop_foreign_config(link);
3764 if (r < 0)
3765 return r;
3766 }
3104883d 3767
0d4ad91d
AR		 3768 r = link_handle_bound_by_list(link);
3769 if (r < 0)
3770 return r;
3771
9c0a72f9
TG		 3772 return 0;
3773}
3774
3775int link_carrier_reset(Link *link) {
3776 int r;
3777
3778 assert(link);
3779
3780 if (link_has_carrier(link)) {
3781 r = link_carrier_lost(link);
3782 if (r < 0)
3783 return r;
3784
3785 r = link_carrier_gained(link);
3786 if (r < 0)
3787 return r;
3788
6a7a4e4d 3789 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3790 }
3791
3792 return 0;
3793}
3794
d236718c
DS		 3795/* This is called every time an interface admin state changes to up;
3796 * specifically, when IFF_UP flag changes from unset to set */
3797static int link_admin_state_up(Link *link) {
3798 int r;
3799
3800 /* We set the ipv6 mtu after the device mtu, but the kernel resets
3801 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
3802 * ipv6_mtu_set prevents this from trying to set it too early before
3803 * the link->network has been setup; we only need to reset it
3804 * here if we've already set it during normal initialization. */
3805 if (link->ipv6_mtu_set) {
3806 r = link_set_ipv6_mtu(link);
3807 if (r < 0)
3808 return r;
3809 }
3810
3811 return 0;
3812}
3813
1c4baffc 3814int link_update(Link *link, sd_netlink_message *m) {
572b21d9 3815 _cleanup_strv_free_ char **s = NULL;
c49b33ac 3816 struct ether_addr mac;
ca4e095a 3817 const char *ifname;
afe7fd56 3818 uint32_t mtu;
d236718c 3819 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 3820 int old_master, r;
22936833 3821
dd3efc09 3822 assert(link);
b8941f74 3823 assert(link->ifname);
22936833
TG		 3824 assert(m);
3825
7619683b 3826 if (link->state == LINK_STATE_LINGER) {
5238e957 3827 log_link_info(link, "Link re-added");
289e6774 3828 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3829
3830 r = link_new_carrier_maps(link);
3831 if (r < 0)
3832 return r;
7619683b
TG		 3833 }
3834
1c4baffc 3835 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3836 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3837 Manager *manager = link->manager;
b8941f74 3838
30de2b89 3839 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3840
30de2b89
YW		 3841 link_drop(link);
3842 r = link_add(manager, m, &link);
3843 if (r < 0)
3844 return r;
b8941f74
TG		 3845 }
3846
572b21d9
YW		 3847 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3848 if (r >= 0)
3849 strv_free_and_replace(link->alternative_names, s);
3850
1c4baffc 3851 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3852 if (r >= 0 && mtu > 0) {
3853 link->mtu = mtu;
4e964aa0 3854 if (link->original_mtu == 0) {
afe7fd56 3855 link->original_mtu = mtu;
6a7a4e4d 3856 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3857 }
3858
3859 if (link->dhcp_client) {
3c9b8860
TG		 3860 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3861 link->mtu);
fc95c359
YW		 3862 if (r < 0)
3863 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3864 }
7465dd22
PF		 3865
3866 if (link->radv) {
3867 r = sd_radv_set_mtu(link->radv, link->mtu);
3868 if (r < 0)
3869 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3870 }
9842de0d 3871 }
69629de9 3872
e9189a1f
TG		 3873 /* The kernel may broadcast NEWLINK messages without the MAC address
3874 set, simply ignore them. */
1c4baffc 3875 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3876 if (r >= 0) {
3c9b8860
TG		 3877 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3878 ETH_ALEN)) {
c49b33ac 3879
3c9b8860
TG		 3880 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3881 ETH_ALEN);
c49b33ac 3882
79008bdd 3883 log_link_debug(link, "MAC address: "
20861203
TG		 3884 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3885 mac.ether_addr_octet[0],
3886 mac.ether_addr_octet[1],
3887 mac.ether_addr_octet[2],
3888 mac.ether_addr_octet[3],
3889 mac.ether_addr_octet[4],
3890 mac.ether_addr_octet[5]);
c49b33ac 3891
20861203
TG		 3892 if (link->ipv4ll) {
3893 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3894 if (r < 0)
3895 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3896 }
c49b33ac 3897
20861203 3898 if (link->dhcp_client) {
3c9b8860 3899 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3900 (const uint8_t *) &link->mac,
3901 sizeof (link->mac),
3902 ARPHRD_ETHER);
6a7a4e4d
LP		 3903 if (r < 0)
3904 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3905
fff1f40c
YW		 3906 r = dhcp4_set_client_identifier(link);
3907 if (r < 0)
3908 return r;
c49b33ac 3909 }
4138fb2c
PF		 3910
3911 if (link->dhcp6_client) {
f24648a6 3912 const DUID* duid = link_get_duid(link);
8341a5c3 3913
4138fb2c 3914 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3915 (const uint8_t *) &link->mac,
3916 sizeof (link->mac),
3917 ARPHRD_ETHER);
6a7a4e4d
LP		 3918 if (r < 0)
3919 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3920
8217ed5e
TH		 3921 if (link->network->iaid_set) {
3922 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3923 link->network->iaid);
3924 if (r < 0)
3925 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3926 }
413708d1 3927
8341a5c3
ZJS		 3928 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3929 duid->type,
3930 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3931 duid->raw_data_len);
413708d1
VK		 3932 if (r < 0)
3933 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3934 }
7465dd22
PF		 3935
3936 if (link->radv) {
3937 r = sd_radv_set_mac(link->radv, &link->mac);
3938 if (r < 0)
3939 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3940 }
420d2058
SS		 3941
3942 if (link->ndisc) {
3943 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3944 if (r < 0)
3945 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3946 }
c49b33ac 3947 }
4f882b2a
TG		 3948 }
3949
bb262ef0
YW		 3950 old_master = link->master_ifindex;
3951 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
3952
d236718c 3953 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 3954 had_carrier = link_has_carrier(link);
3955
bb262ef0 3956 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 3957 if (r < 0)
3958 return r;
3959
d236718c
DS		 3960 if (!link_was_admin_up && (link->flags & IFF_UP)) {
3961 log_link_info(link, "Link UP");
3962
3963 r = link_admin_state_up(link);
3964 if (r < 0)
3965 return r;
3966 } else if (link_was_admin_up && !(link->flags & IFF_UP))
3967 log_link_info(link, "Link DOWN");
3968
273eec24
LP		 3969 r = link_update_lldp(link);
3970 if (r < 0)
3971 return r;
3972
a61bb41c
TG		 3973 carrier_gained = !had_carrier && link_has_carrier(link);
3974 carrier_lost = had_carrier && !link_has_carrier(link);
3975
3976 if (carrier_gained) {
6a7a4e4d 3977 log_link_info(link, "Gained carrier");
a61bb41c 3978
9c0a72f9
TG		 3979 r = link_carrier_gained(link);
3980 if (r < 0)
3981 return r;
a61bb41c 3982 } else if (carrier_lost) {
6a7a4e4d 3983 log_link_info(link, "Lost carrier");
a61bb41c 3984
9c0a72f9
TG		 3985 r = link_carrier_lost(link);
3986 if (r < 0)
a61bb41c 3987 return r;
a61bb41c
TG		 3988 }
3989
3990 return 0;
dd3efc09 3991}
fe8db0c5 3992
b295beea
LP		 3993static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3994 bool space = false;
3995 Iterator i;
3996 Link *link;
3997
3998 assert(f);
3999 assert(prefix);
4000
4001 if (hashmap_isempty(h))
4002 return;
4003
0d536673 4004 fputs(prefix, f);
b295beea
LP		 4005 HASHMAP_FOREACH(link, h, i) {
4006 if (space)
0d536673 4007 fputc(' ', f);
b295beea
LP		 4008
4009 fprintf(f, "%i", link->ifindex);
4010 space = true;
4011 }
4012
0d536673 4013 fputc('\n', f);
b295beea
LP		 4014}
4015
15761549 4016static void link_save_dns(FILE *f, struct in_addr_data *dns, unsigned n_dns, bool *space) {
dddc8d1e 4017 for (unsigned j = 0; j < n_dns; j++) {
15761549 4018 _cleanup_free_ char *b = NULL;
dddc8d1e 4019 int r;
15761549
YW		 4020
4021 r = in_addr_to_string(dns[j].family, &dns[j].address, &b);
4022 if (r < 0) {
4023 log_debug_errno(r, "Failed to format address, ignoring: %m");
4024 continue;
4025 }
4026
4027 if (*space)
4028 fputc(' ', f);
4029 fputs(b, f);
4030 *space = true;
4031 }
4032}
4033
d5e172d2
ZJS		 4034static void serialize_addresses(
4035 FILE *f,
4036 const char *lvalue,
4037 bool *space,
4038 char **addresses,
4039 sd_dhcp_lease *lease,
4040 bool conditional,
ddb82ec2 4041 sd_dhcp_lease_server_type what,
d5e172d2
ZJS		 4042 sd_dhcp6_lease *lease6,
4043 bool conditional6,
4044 int (*lease6_get_addr)(sd_dhcp6_lease*, const struct in6_addr**),
4045 int (*lease6_get_fqdn)(sd_dhcp6_lease*, char ***)) {
4046 int r;
4047
4048 bool _space = false;
4049 if (!space)
4050 space = &_space;
4051
4052 if (lvalue)
4053 fprintf(f, "%s=", lvalue);
4054 fputstrv(f, addresses, NULL, space);
4055
4056 if (lease && conditional) {
4057 const struct in_addr *lease_addresses;
4058
4059 r = sd_dhcp_lease_get_servers(lease, what, &lease_addresses);
4060 if (r > 0)
d8bff5cc 4061 serialize_in_addrs(f, lease_addresses, r, space, in4_addr_is_non_local);
d5e172d2
ZJS		 4062 }
4063
4064 if (lease6 && conditional6 && lease6_get_addr) {
4065 const struct in6_addr *in6_addrs;
4066
4067 r = lease6_get_addr(lease6, &in6_addrs);
d8bff5cc
ZJS		 4068 if (r > 0)
4069 serialize_in6_addrs(f, in6_addrs, r, space);
d5e172d2
ZJS		 4070 }
4071
4072 if (lease6 && conditional6 && lease6_get_fqdn) {
4073 char **in6_hosts;
4074
4075 r = lease6_get_fqdn(lease6, &in6_hosts);
4076 if (r > 0)
4077 fputstrv(f, in6_hosts, NULL, space);
4078 }
4079
4080 if (lvalue)
4081 fputc('\n', f);
4082}
4083
fe8db0c5 4084int link_save(Link *link) {
d361b373 4085 const char *admin_state, *oper_state, *carrier_state, *address_state;
68a8723c 4086 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 4087 _cleanup_fclose_ FILE *f = NULL;
c1eb9872 4088 Route *route;
18d8a2cf 4089 Address *a;
e7780c8d 4090 Iterator i;
fe8db0c5
TG		 4091 int r;
4092
4093 assert(link);
4094 assert(link->state_file);
68a8723c 4095 assert(link->lease_file);
bbf7c048
TG		 4096 assert(link->manager);
4097
370e9930 4098 if (link->state == LINK_STATE_LINGER) {
6990fb6b 4099 (void) unlink(link->state_file);
370e9930
TG		 4100 return 0;
4101 }
4102
34437b4f
LP		 4103 link_lldp_save(link);
4104
deb2e523
TG		 4105 admin_state = link_state_to_string(link->state);
4106 assert(admin_state);
4107
e375dcde
TG		 4108 oper_state = link_operstate_to_string(link->operstate);
4109 assert(oper_state);
deb2e523 4110
ac999bf0
YW		 4111 carrier_state = link_carrier_state_to_string(link->carrier_state);
4112 assert(carrier_state);
4113
4114 address_state = link_address_state_to_string(link->address_state);
4115 assert(address_state);
4116
fe8db0c5
TG		 4117 r = fopen_temporary(link->state_file, &f, &temp_path);
4118 if (r < 0)
6a7a4e4d 4119 goto fail;
fe8db0c5 4120
5512a963 4121 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 4122
4123 fprintf(f,
4124 "# This is private data. Do not parse.\n"
deb2e523 4125 "ADMIN_STATE=%s\n"
ac999bf0
YW		 4126 "OPER_STATE=%s\n"
4127 "CARRIER_STATE=%s\n"
4128 "ADDRESS_STATE=%s\n",
4129 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 4130
bcb7a07e 4131 if (link->network) {
fe0e16db
YW		 4132 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
4133 const char *dhcp_domainname = NULL, *p;
07bdc70d 4134 sd_dhcp6_lease *dhcp6_lease = NULL;
fe0e16db 4135 bool space;
07bdc70d 4136
c1a38904
MTL		 4137 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
4138 yes_no(link->network->required_for_online));
4139
d5e172d2
ZJS		 4140 LinkOperationalStateRange st = link->network->required_operstate_for_online;
4141 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s%s%s\n",
4142 strempty(link_operstate_to_string(st.min)),
4143 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? ":" : "",
4144 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? strempty(link_operstate_to_string(st.max)) : "");
4ac77d63 4145
07bdc70d 4146 if (link->dhcp6_client) {
4058d339
TG		 4147 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
4148 if (r < 0 && r != -ENOMSG)
2206aa5c 4149 log_link_debug_errno(link, r, "Failed to get DHCPv6 lease: %m");
07bdc70d 4150 }
b0e39c82 4151
adc5b2e2
TG		 4152 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
4153
d5e172d2
ZJS		 4154 /************************************************************/
4155
0d536673 4156 fputs("DNS=", f);
ea352b40 4157 space = false;
15761549
YW		 4158 if (link->n_dns != (unsigned) -1)
4159 link_save_dns(f, link->dns, link->n_dns, &space);
4160 else
4161 link_save_dns(f, link->network->dns, link->network->n_dns, &space);
d5314fff 4162
d5e172d2
ZJS		 4163 serialize_addresses(f, NULL, &space,
4164 NULL,
4165 link->dhcp_lease,
4166 link->network->dhcp_use_dns,
ddb82ec2 4167 SD_DHCP_LEASE_DNS,
d5e172d2
ZJS		 4168 dhcp6_lease,
4169 link->network->dhcp6_use_dns,
4170 sd_dhcp6_lease_get_dns,
4171 NULL);
1e7a0e21
LP		 4172
4173 /* Make sure to flush out old entries before we use the NDISC data */
4174 ndisc_vacuum(link);
4175
b296797f 4176 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 4177 NDiscRDNSS *dd;
4178
d8bff5cc
ZJS		 4179 SET_FOREACH(dd, link->ndisc_rdnss, i)
4180 serialize_in6_addrs(f, &dd->address, 1, &space);
299d578f
SS		 4181 }
4182
4183 fputc('\n', f);
4184
d5e172d2
ZJS		 4185 /************************************************************/
4186
4187 serialize_addresses(f, "NTP", NULL,
4188 link->ntp ?: link->network->ntp,
4189 link->dhcp_lease,
4190 link->network->dhcp_use_ntp,
ddb82ec2 4191 SD_DHCP_LEASE_NTP,
d5e172d2
ZJS		 4192 dhcp6_lease,
4193 link->network->dhcp6_use_ntp,
4194 sd_dhcp6_lease_get_ntp_addrs,
4195 sd_dhcp6_lease_get_ntp_fqdn);
4196
4197 serialize_addresses(f, "SIP", NULL,
2a71d57f 4198 NULL,
d5e172d2
ZJS		 4199 link->dhcp_lease,
4200 link->network->dhcp_use_sip,
ddb82ec2 4201 SD_DHCP_LEASE_SIP,
2a71d57f 4202 NULL, false, NULL, NULL);
d5e172d2
ZJS		 4203
4204 /************************************************************/
bd8f6538 4205
b2a81c0b 4206 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 4207 if (link->dhcp_lease) {
b2a81c0b 4208 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 4209 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
4210 }
b2a81c0b
LP		 4211 if (dhcp6_lease)
4212 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 4213 }
4214
fe0e16db
YW		 4215 fputs("DOMAINS=", f);
4216 space = false;
15761549 4217 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains, i)
fe0e16db 4218 fputs_with_space(f, p, NULL, &space);
07bdc70d 4219
1e7a0e21 4220 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP		 4221 if (dhcp_domainname)
4222 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4223 if (dhcp_domains)
4224 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4225 if (dhcp6_domains)
4226 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 4227 }
4228
4229 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
4230 NDiscDNSSL *dd;
1e7a0e21
LP		 4231
4232 SET_FOREACH(dd, link->ndisc_dnssl, i)
4233 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4234 }
b2a81c0b 4235
0d536673 4236 fputc('\n', f);
6192b846 4237
d5e172d2
ZJS		 4238 /************************************************************/
4239
fe0e16db
YW		 4240 fputs("ROUTE_DOMAINS=", f);
4241 space = false;
15761549 4242 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains, i)
fe0e16db 4243 fputs_with_space(f, p, NULL, &space);
b2a81c0b 4244
1e7a0e21 4245 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
1e7a0e21
LP		 4246 if (dhcp_domainname)
4247 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4248 if (dhcp_domains)
4249 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4250 if (dhcp6_domains)
4251 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 4252 }
4253
4254 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
4255 NDiscDNSSL *dd;
1e7a0e21
LP		 4256
4257 SET_FOREACH(dd, link->ndisc_dnssl, i)
4258 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4259 }
b2a81c0b 4260
0d536673 4261 fputc('\n', f);
67272d15 4262
d5e172d2
ZJS		 4263 /************************************************************/
4264
3c9b8860 4265 fprintf(f, "LLMNR=%s\n",
15761549 4266 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
d5e172d2
ZJS		 4267
4268 /************************************************************/
4269
aaa297d4 4270 fprintf(f, "MDNS=%s\n",
15761549 4271 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
15761549 4272
d5e172d2
ZJS		 4273 /************************************************************/
4274
4275 int dns_default_route =
4276 link->dns_default_route >= 0 ? link->dns_default_route :
4277 link->network->dns_default_route;
4278 if (dns_default_route >= 0)
4279 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(dns_default_route));
4280
4281 /************************************************************/
4282
4283 DnsOverTlsMode dns_over_tls_mode =
4284 link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID ? link->dns_over_tls_mode :
4285 link->network->dns_over_tls_mode;
4286 if (dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
4287 fprintf(f, "DNS_OVER_TLS=%s\n", dns_over_tls_mode_to_string(dns_over_tls_mode));
4288
4289 /************************************************************/
4290
4291 DnssecMode dnssec_mode =
4292 link->dnssec_mode != _DNSSEC_MODE_INVALID ? link->dnssec_mode :
4293 link->network->dnssec_mode;
4294 if (dnssec_mode != _DNSSEC_MODE_INVALID)
4295 fprintf(f, "DNSSEC=%s\n", dnssec_mode_to_string(dnssec_mode));
4296
4297 /************************************************************/
4298
4299 Set *nta_anchors = link->dnssec_negative_trust_anchors;
4300 if (set_isempty(nta_anchors))
4301 nta_anchors = link->network->dnssec_negative_trust_anchors;
4302
4303 if (!set_isempty(nta_anchors)) {
8a516214
LP		 4304 const char *n;
4305
0d536673 4306 fputs("DNSSEC_NTA=", f);
8a516214 4307 space = false;
d5e172d2 4308 SET_FOREACH(n, nta_anchors, i)
d390f8ef 4309 fputs_with_space(f, n, NULL, &space);
0d536673 4310 fputc('\n', f);
8a516214
LP		 4311 }
4312
d5e172d2
ZJS		 4313 /************************************************************/
4314
0d536673 4315 fputs("ADDRESSES=", f);
e7780c8d
TG		 4316 space = false;
4317 SET_FOREACH(a, link->addresses, i) {
4318 _cleanup_free_ char *address_str = NULL;
4319
4320 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
4321 if (r < 0)
4322 goto fail;
4323
e7780c8d
TG		 4324 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
4325 space = true;
4326 }
0d536673 4327 fputc('\n', f);
c1eb9872 4328
d5e172d2
ZJS		 4329 /************************************************************/
4330
0d536673 4331 fputs("ROUTES=", f);
c1eb9872
TG		 4332 space = false;
4333 SET_FOREACH(route, link->routes, i) {
4334 _cleanup_free_ char *route_str = NULL;
4335
4336 r = in_addr_to_string(route->family, &route->dst, &route_str);
4337 if (r < 0)
4338 goto fail;
4339
ecc3f340
ZJS		 4340 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
4341 space ? " " : "", route_str,
f833694d 4342 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 4343 space = true;
4344 }
4345
0d536673 4346 fputc('\n', f);
bcb7a07e 4347 }
7374f9d8 4348
b295beea
LP		 4349 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
4350 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 4351
8eb9058d 4352 if (link->dhcp_lease) {
bd91b83e 4353 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 4354 if (r < 0)
c2d6bd61 4355 goto fail;
fe8db0c5 4356
7374f9d8 4357 fprintf(f,
b0e39c82
TG		 4358 "DHCP_LEASE=%s\n",
4359 link->lease_file);
deb2e523 4360 } else
6990fb6b 4361 (void) unlink(link->lease_file);
fe8db0c5 4362
0bc70f1d
TG		 4363 if (link->ipv4ll) {
4364 struct in_addr address;
4365
4366 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
4367 if (r >= 0) {
0d536673 4368 fputs("IPV4LL_ADDRESS=", f);
072320ea 4369 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 4370 fputc('\n', f);
0bc70f1d
TG		 4371 }
4372 }
4373
7e738e7b
SS		 4374 if (link->dhcp6_client) {
4375 _cleanup_free_ char *duid = NULL;
4376 uint32_t iaid;
4377
4378 r = sd_dhcp6_client_get_iaid(link->dhcp6_client, &iaid);
4379 if (r >= 0)
4380 fprintf(f, "DHCP6_CLIENT_IAID=0x%x\n", iaid);
4381
4382 r = sd_dhcp6_client_duid_as_string(link->dhcp6_client, &duid);
4383 if (r >= 0)
4384 fprintf(f, "DHCP6_CLIENT_DUID=%s\n", duid);
4385 }
18d8a2cf 4386
c2d6bd61
LP		 4387 r = fflush_and_check(f);
4388 if (r < 0)
4389 goto fail;
fe8db0c5 4390
c2d6bd61 4391 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 4392 r = -errno;
c2d6bd61 4393 goto fail;
fe8db0c5
TG		 4394 }
4395
c2d6bd61 4396 return 0;
dacd6cee 4397
c2d6bd61 4398fail:
6a7a4e4d 4399 (void) unlink(link->state_file);
6a7a4e4d
LP		 4400 if (temp_path)
4401 (void) unlink(temp_path);
4402
dacd6cee 4403 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 4404}
4405
84de38c5
TG		 4406/* The serialized state in /run is no longer up-to-date. */
4407void link_dirty(Link *link) {
4408 int r;
4409
4410 assert(link);
4411
0c241a37
SS		 4412 /* mark manager dirty as link is dirty */
4413 manager_dirty(link->manager);
4414
de7fef4b 4415 r = set_ensure_put(&link->manager->dirty_links, NULL, link);
0c241a37 4416 if (r <= 0)
de7fef4b 4417 /* Ignore allocation errors and don't take another ref if the link was already dirty */
84de38c5 4418 return;
84de38c5
TG		 4419 link_ref(link);
4420}
4421
4422/* The serialized state in /run is up-to-date */
4423void link_clean(Link *link) {
4424 assert(link);
4425 assert(link->manager);
4426
1046bf9b 4427 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4428}
4429
fe8db0c5 4430static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4431 [LINK_STATE_PENDING] = "pending",
bd08ce56 4432 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 4433 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 4434 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4435 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4436 [LINK_STATE_FAILED] = "failed",
370e9930 4437 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4438};
4439
4440DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
5ecb131d
YW		 4441
4442int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg) {
4443 const char *err_msg = NULL;
4444
4445 (void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg);
ab119e63
YW		 4446 return log_link_full(link, level, err,
4447 "%s: %s%s%s%m",
4448 msg,
4449 strempty(err_msg),
4450 err_msg && !endswith(err_msg, ".") ? "." : "",
4451 err_msg ? " " : "");
5ecb131d 4452}
Unnamed repository; edit this file 'description' to name the repository.