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network: add debugging log why link is not in configured state yet
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
53e1b683 1/* SPDX-License-Identifier: LGPL-2.1+ */
f579559b 2
9aa5d8ba 3#include <netinet/in.h>
f579559b 4#include <linux/if.h>
8f815e8b 5#include <linux/if_arp.h>
518cd6b5 6#include <linux/if_link.h>
4cc7a82c 7#include <unistd.h>
f579559b 8
b5efdb8a 9#include "alloc-util.h"
737f1405
YW		 10#include "bond.h"
11#include "bridge.h"
1346b1f0 12#include "bus-util.h"
27dfc982 13#include "dhcp-identifier.h"
bd91b83e 14#include "dhcp-lease-internal.h"
686d13b9 15#include "env-file.h"
4bb7cc82 16#include "ethtool-util.h"
3ffd4af2 17#include "fd-util.h"
cf1d700d 18#include "fileio.h"
737f1405 19#include "ipvlan.h"
ef118d00 20#include "missing_network.h"
cf1d700d 21#include "netlink-util.h"
c6f7c917 22#include "network-internal.h"
3ddcbeea 23#include "networkd-can.h"
8fcf1d61 24#include "networkd-dhcp-server.h"
ca5ad760
YW		 25#include "networkd-dhcp4.h"
26#include "networkd-dhcp6.h"
27#include "networkd-ipv4ll.h"
a0e5c15d 28#include "networkd-ipv6-proxy-ndp.h"
6a1af3d4
YW		 29#include "networkd-link-bus.h"
30#include "networkd-link.h"
8e1ad1ea 31#include "networkd-lldp-tx.h"
23f53b99 32#include "networkd-manager.h"
1e7a0e21 33#include "networkd-ndisc.h"
e4a71bf3 34#include "networkd-neighbor.h"
518cd6b5 35#include "networkd-sriov.h"
7465dd22 36#include "networkd-radv.h"
bce67bbe 37#include "networkd-routing-policy-rule.h"
8d968fdd 38#include "networkd-wifi.h"
cf1d700d
TG		 39#include "set.h"
40#include "socket-util.h"
bf331d87 41#include "stat-util.h"
15a5e950 42#include "stdio-util.h"
8b43440b 43#include "string-table.h"
51517f9e 44#include "strv.h"
62e021a9 45#include "sysctl-util.h"
34658df2 46#include "tc.h"
e4de7287 47#include "tmpfile-util.h"
299ad32d 48#include "udev-util.h"
cf1d700d 49#include "util.h"
737f1405 50#include "vrf.h"
fc2f9534 51
bdb9f580
YW		 52uint32_t link_get_vrf_table(Link *link) {
53 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
54}
55
56uint32_t link_get_dhcp_route_table(Link *link) {
57 /* When the interface is part of an VRF use the VRFs routing table, unless
58 * another table is explicitly specified. */
59 if (link->network->dhcp_route_table_set)
60 return link->network->dhcp_route_table;
61 return link_get_vrf_table(link);
62}
63
64uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
65 if (link->network->ipv6_accept_ra_route_table_set)
66 return link->network->ipv6_accept_ra_route_table;
67 return link_get_vrf_table(link);
68}
69
f24648a6
YW		 70DUID* link_get_duid(Link *link) {
71 if (link->network->duid.type != _DUID_TYPE_INVALID)
72 return &link->network->duid;
73 else
74 return &link->manager->duid;
75}
76
b9d74c40
LP		 77static bool link_dhcp6_enabled(Link *link) {
78 assert(link);
79
fa709992
LP		 80 if (!socket_ipv6_is_supported())
81 return false;
82
78c958f8
TG		 83 if (link->flags & IFF_LOOPBACK)
84 return false;
85
86 if (!link->network)
87 return false;
88
f2bfcdb9
YW		 89 if (link->network->bond)
90 return false;
91
500b96eb 92 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 93 return false;
94
e0ee46f2 95 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 96}
97
b9d74c40
LP		 98static bool link_dhcp4_enabled(Link *link) {
99 assert(link);
100
78c958f8
TG		 101 if (link->flags & IFF_LOOPBACK)
102 return false;
103
104 if (!link->network)
105 return false;
106
f2bfcdb9
YW		 107 if (link->network->bond)
108 return false;
109
500b96eb 110 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 111 return false;
112
e0ee46f2 113 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 114}
115
b9d74c40
LP		 116static bool link_dhcp4_server_enabled(Link *link) {
117 assert(link);
118
78c958f8
TG		 119 if (link->flags & IFF_LOOPBACK)
120 return false;
121
122 if (!link->network)
123 return false;
124
f2bfcdb9
YW		 125 if (link->network->bond)
126 return false;
127
500b96eb 128 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 129 return false;
130
78c958f8
TG		 131 return link->network->dhcp_server;
132}
133
2d792895 134bool link_ipv4ll_enabled(Link *link, AddressFamily mask) {
b9d74c40 135 assert(link);
910feb78 136 assert((mask & ~(ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) == 0);
b9d74c40 137
78c958f8
TG		 138 if (link->flags & IFF_LOOPBACK)
139 return false;
140
141 if (!link->network)
142 return false;
143
500b96eb 144 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 145 return false;
146
98d20a17 147 if (STRPTR_IN_SET(link->kind,
148 "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
c6ac3729 149 "vti6", "nlmon", "xfrm"))
a8f5bba6
JD		 150 return false;
151
f410d463
YW		 152 /* L3 or L3S mode do not support ARP. */
153 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
154 return false;
155
f2bfcdb9
YW		 156 if (link->network->bond)
157 return false;
158
910feb78 159 return link->network->link_local & mask;
8bc17bb3
SS		 160}
161
b9d74c40
LP		 162static bool link_ipv6ll_enabled(Link *link) {
163 assert(link);
164
fa709992
LP		 165 if (!socket_ipv6_is_supported())
166 return false;
167
d0d6a4cd
TG		 168 if (link->flags & IFF_LOOPBACK)
169 return false;
170
171 if (!link->network)
172 return false;
173
500b96eb 174 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 175 return false;
176
177 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon"))
a8f5bba6
JD		 178 return false;
179
f2bfcdb9
YW		 180 if (link->network->bond)
181 return false;
182
e0ee46f2 183 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 184}
185
439689c6
SS		 186static bool link_ipv6_enabled(Link *link) {
187 assert(link);
188
189 if (!socket_ipv6_is_supported())
190 return false;
191
b102cdca 192 if (link->network->bond)
2b00a4e0
TY		 193 return false;
194
500b96eb 195 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 196 return false;
197
4cef7fe3 198 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
adfeee49
YW		 199 if (link_ipv6ll_enabled(link))
200 return true;
201
202 if (network_has_static_ipv6_configurations(link->network))
203 return true;
204
205 return false;
439689c6
SS		 206}
207
7465dd22
PF		 208static bool link_radv_enabled(Link *link) {
209 assert(link);
210
211 if (!link_ipv6ll_enabled(link))
212 return false;
213
55a7c78b 214 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 215}
216
769d324c 217static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 218 assert(link);
219
5a8bcb67
LP		 220 if (link->flags & IFF_LOOPBACK)
221 return false;
222
223 if (!link->network)
224 return false;
225
2d792895 226 if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
765afd5c
LP		 227 return false;
228
e0ee46f2 229 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 230}
231
232static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 233 assert(link);
765afd5c
LP		 234
235 if (!socket_ipv6_is_supported())
236 return false;
237
769d324c
LP		 238 if (link->flags & IFF_LOOPBACK)
239 return false;
240
241 if (!link->network)
242 return false;
243
2d792895 244 if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
765afd5c
LP		 245 return false;
246
e0ee46f2 247 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 248}
249
23d8b221
SS		 250static bool link_proxy_arp_enabled(Link *link) {
251 assert(link);
252
253 if (link->flags & IFF_LOOPBACK)
254 return false;
255
256 if (!link->network)
257 return false;
258
259 if (link->network->proxy_arp < 0)
260 return false;
261
262 return true;
263}
264
b9d74c40
LP		 265static bool link_ipv6_accept_ra_enabled(Link *link) {
266 assert(link);
267
fa709992
LP		 268 if (!socket_ipv6_is_supported())
269 return false;
270
f5a8c43f
TG		 271 if (link->flags & IFF_LOOPBACK)
272 return false;
273
274 if (!link->network)
275 return false;
276
702c979f
SS		 277 if (!link_ipv6ll_enabled(link))
278 return false;
279
f5a8c43f
TG		 280 /* If unset use system default (enabled if local forwarding is disabled.
281 * disabled if local forwarding is enabled).
282 * If set, ignore or enforce RA independent of local forwarding state.
283 */
284 if (link->network->ipv6_accept_ra < 0)
285 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
286 return !link_ipv6_forward_enabled(link);
287 else if (link->network->ipv6_accept_ra > 0)
288 /* accept RA even if ip_forward is enabled */
289 return true;
290 else
291 /* ignore RA */
292 return false;
293}
294
1f0d9695 295static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 296 assert(link);
d68e2e59
LP		 297
298 if (!socket_ipv6_is_supported())
299 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
300
49092e22 301 if (link->flags & IFF_LOOPBACK)
1f0d9695 302 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 303
304 if (!link->network)
1f0d9695 305 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 306
307 return link->network->ipv6_privacy_extensions;
308}
309
57ad7607 310static int link_update_ipv6_sysctl(Link *link) {
482efedc 311 bool enabled;
439689c6
SS		 312 int r;
313
314 if (link->flags & IFF_LOOPBACK)
315 return 0;
316
482efedc
SS		 317 enabled = link_ipv6_enabled(link);
318 if (enabled) {
319 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", false);
320 if (r < 0)
57ad7607
ZJS		 321 return log_link_warning_errno(link, r, "Cannot enable IPv6: %m");
322
323 log_link_info(link, "IPv6 successfully enabled");
482efedc 324 }
439689c6
SS		 325
326 return 0;
327}
328
34bf3c00
YW		 329static bool link_is_enslaved(Link *link) {
330 if (link->flags & IFF_SLAVE)
331 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
332 return true;
333
34bf3c00
YW		 334 if (!link->network)
335 return false;
336
bb262ef0 337 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 338 return true;
339
bb262ef0
YW		 340 /* TODO: add conditions for other netdevs. */
341
34bf3c00
YW		 342 return false;
343}
344
45e11abf
YW		 345static void link_update_master_operstate(Link *link, NetDev *netdev) {
346 Link *master;
347
348 if (!netdev)
349 return;
350
7936917e
YW		 351 if (netdev->ifindex <= 0)
352 return;
353
45e11abf
YW		 354 if (link_get(link->manager, netdev->ifindex, &master) < 0)
355 return;
356
357 link_update_operstate(master, true);
358}
359
360void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 361 LinkOperationalState operstate;
1678fbb3
YW		 362 LinkCarrierState carrier_state;
363 LinkAddressState address_state;
35c5a9ca 364 _cleanup_strv_free_ char **p = NULL;
1678fbb3 365 uint8_t scope = RT_SCOPE_NOWHERE;
35c5a9ca 366 bool changed = false;
1678fbb3 367 Address *address;
45e11abf 368 Iterator i;
14153d1b 369
84de38c5
TG		 370 assert(link);
371
372 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 373 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 374 else if (link_has_carrier(link)) {
1678fbb3
YW		 375 if (link_is_enslaved(link))
376 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 377 else
1678fbb3 378 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 379 } else if (link->flags & IFF_UP)
1678fbb3 380 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 381 else
1678fbb3 382 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 383
1678fbb3 384 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 385 Link *slave;
386
5f707e12 387 SET_FOREACH(slave, link->slaves, i) {
959f65d3 388 link_update_operstate(slave, false);
84de38c5 389
1678fbb3
YW		 390 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
391 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 392 }
959f65d3 393 }
84de38c5 394
1678fbb3
YW		 395 SET_FOREACH(address, link->addresses, i) {
396 if (!address_is_ready(address))
397 continue;
84de38c5 398
1678fbb3
YW		 399 if (address->scope < scope)
400 scope = address->scope;
401 }
84de38c5 402
1678fbb3
YW		 403 /* for operstate we also take foreign addresses into account */
404 SET_FOREACH(address, link->addresses_foreign, i) {
405 if (!address_is_ready(address))
406 continue;
407
408 if (address->scope < scope)
409 scope = address->scope;
410 }
411
412 if (scope < RT_SCOPE_SITE)
413 /* universally accessible addresses found */
414 address_state = LINK_ADDRESS_STATE_ROUTABLE;
415 else if (scope < RT_SCOPE_HOST)
416 /* only link or site local addresses found */
417 address_state = LINK_ADDRESS_STATE_DEGRADED;
84de38c5 418 else
1678fbb3
YW		 419 /* no useful addresses found */
420 address_state = LINK_ADDRESS_STATE_OFF;
421
422 /* Mapping of address and carrier state vs operational state
423 * carrier state
424 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
425 * ------------------------------------------------------------------------------
426 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
427 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
428 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
429 */
84de38c5 430
1678fbb3
YW		 431 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
432 operstate = (LinkOperationalState) carrier_state;
433 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
434 operstate = LINK_OPERSTATE_ROUTABLE;
435 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
436 operstate = LINK_OPERSTATE_DEGRADED;
437 else
14153d1b
YW		 438 operstate = LINK_OPERSTATE_ENSLAVED;
439
35c5a9ca
YW		 440 if (link->carrier_state != carrier_state) {
441 link->carrier_state = carrier_state;
442 changed = true;
443 if (strv_extend(&p, "CarrierState") < 0)
444 log_oom();
445 }
959f65d3 446
35c5a9ca
YW		 447 if (link->address_state != address_state) {
448 link->address_state = address_state;
449 changed = true;
450 if (strv_extend(&p, "AddressState") < 0)
451 log_oom();
959f65d3
YW		 452 }
453
84de38c5
TG		 454 if (link->operstate != operstate) {
455 link->operstate = operstate;
35c5a9ca
YW		 456 changed = true;
457 if (strv_extend(&p, "OperationalState") < 0)
458 log_oom();
84de38c5 459 }
959f65d3 460
35c5a9ca
YW		 461 if (p)
462 link_send_changed_strv(link, p);
463 if (changed)
464 link_dirty(link);
465
45e11abf
YW		 466 if (also_update_master && link->network) {
467 link_update_master_operstate(link, link->network->bond);
468 link_update_master_operstate(link, link->network->bridge);
959f65d3 469 }
84de38c5
TG		 470}
471
51d18171
TG		 472#define FLAG_STRING(string, flag, old, new) \
473 (((old ^ new) & flag) \
474 ? ((old & flag) ? (" -" string) : (" +" string)) \
475 : "")
476
bb262ef0 477static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 478 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
479 uint8_t operstate;
480 int r;
481
482 assert(link);
483
484 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 485 if (r < 0)
486 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 487
1c4baffc 488 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 489 if (r < 0)
490 /* if we got a message without operstate, take it to mean
491 the state was unchanged */
492 operstate = link->kernel_operstate;
493
bb262ef0 494 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 495 return 0;
496
497 if (link->flags != flags) {
6a7a4e4d 498 log_link_debug(link, "Flags change:%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
51d18171
TG		 499 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
500 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
501 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
502 FLAG_STRING("UP", IFF_UP, link->flags, flags),
503 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
504 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
505 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
506 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
507 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
508 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
509 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
510 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
511 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
512 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
513 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
514 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
515 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
516 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
517 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
518
519 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
520 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
521 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
522 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
523 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
524 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
525 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
526 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
527
528 /* link flags are currently at most 18 bits, let's align to
529 * printing 20 */
530 if (unknown_flags_added)
79008bdd 531 log_link_debug(link,
6a7a4e4d 532 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 533 unknown_flags_added);
534
535 if (unknown_flags_removed)
79008bdd 536 log_link_debug(link,
6a7a4e4d 537 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 538 unknown_flags_removed);
539 }
540
541 link->flags = flags;
542 link->kernel_operstate = operstate;
543
959f65d3 544 link_update_operstate(link, true);
51d18171
TG		 545
546 return 0;
547}
548
1c4baffc 549static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 550 _cleanup_(link_unrefp) Link *link = NULL;
6cad256d 551 const char *ifname, *kind = NULL;
b710e6b6 552 unsigned short iftype;
572b21d9
YW		 553 int r, ifindex;
554 uint16_t type;
f579559b 555
0c2f9b84 556 assert(manager);
505f8da7 557 assert(message);
f579559b
TG		 558 assert(ret);
559
6cad256d
TJ		 560 /* check for link kind */
561 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
562 if (r == 0) {
db2f8a2e 563 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 564 r = sd_netlink_message_exit_container(message);
565 if (r < 0)
566 return r;
567 }
568
1c4baffc 569 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 570 if (r < 0)
571 return r;
572 else if (type != RTM_NEWLINK)
573 return -EINVAL;
574
575 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
576 if (r < 0)
577 return r;
578 else if (ifindex <= 0)
579 return -EINVAL;
580
b710e6b6
LP		 581 r = sd_rtnl_message_link_get_type(message, &iftype);
582 if (r < 0)
583 return r;
584
1c4baffc 585 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 586 if (r < 0)
587 return r;
588
17f9c355 589 link = new(Link, 1);
f579559b
TG		 590 if (!link)
591 return -ENOMEM;
592
17f9c355
YW		 593 *link = (Link) {
594 .n_ref = 1,
595 .manager = manager,
596 .state = LINK_STATE_PENDING,
17f9c355
YW		 597 .ifindex = ifindex,
598 .iftype = iftype,
15761549
YW		 599
600 .n_dns = (unsigned) -1,
601 .dns_default_route = -1,
602 .llmnr = _RESOLVE_SUPPORT_INVALID,
603 .mdns = _RESOLVE_SUPPORT_INVALID,
604 .dnssec_mode = _DNSSEC_MODE_INVALID,
605 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
17f9c355
YW		 606 };
607
505f8da7
TG		 608 link->ifname = strdup(ifname);
609 if (!link->ifname)
610 return -ENOMEM;
f579559b 611
6cad256d
TJ		 612 if (kind) {
613 link->kind = strdup(kind);
614 if (!link->kind)
615 return -ENOMEM;
616 }
617
cbff7170
TJ		 618 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
619 if (r < 0)
620 log_link_debug_errno(link, r, "New device has no master, continuing without");
621
1c4baffc 622 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 623 if (r < 0)
34437b4f 624 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 625
c643bda5 626 r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac);
4bb7cc82
YW		 627 if (r < 0)
628 log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
629
c643bda5
YW		 630 r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver);
631 if (r < 0)
632 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
633
572b21d9
YW		 634 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &link->alternative_names);
635 if (r < 0 && r != -ENODATA)
636 return r;
637
34437b4f 638 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 639 return -ENOMEM;
fe8db0c5 640
34437b4f 641 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 642 return -ENOMEM;
643
34437b4f 644 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 645 return -ENOMEM;
646
d5099efc 647 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 648 if (r < 0)
649 return r;
650
651 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 652 if (r < 0)
653 return r;
654
bb262ef0 655 r = link_update_flags(link, message, false);
51d18171
TG		 656 if (r < 0)
657 return r;
658
1cc6c93a 659 *ret = TAKE_PTR(link);
f579559b
TG		 660
661 return 0;
662}
663
15761549
YW		 664void link_ntp_settings_clear(Link *link) {
665 link->ntp = strv_free(link->ntp);
666}
667
668void link_dns_settings_clear(Link *link) {
669 link->dns = mfree(link->dns);
670 link->n_dns = (unsigned) -1;
671
672 link->search_domains = ordered_set_free_free(link->search_domains);
673 link->route_domains = ordered_set_free_free(link->route_domains);
674
675 link->dns_default_route = -1;
676 link->llmnr = _RESOLVE_SUPPORT_INVALID;
677 link->mdns = _RESOLVE_SUPPORT_INVALID;
678 link->dnssec_mode = _DNSSEC_MODE_INVALID;
679 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
680
681 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
682}
683
1a6bb31f
YW		 684static void link_free_engines(Link *link) {
685 if (!link)
686 return;
687
688 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
689 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
690 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
691 link->dhcp_routes = set_free(link->dhcp_routes);
692
693 link->lldp = sd_lldp_unref(link->lldp);
694
695 ndisc_flush(link);
696
697 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
698 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
699 link->ndisc = sd_ndisc_unref(link->ndisc);
700 link->radv = sd_radv_unref(link->radv);
701}
702
8301aa0b 703static Link *link_free(Link *link) {
428fd0a7
TG		 704 Address *address;
705
8301aa0b 706 assert(link);
f579559b 707
15761549
YW		 708 link_ntp_settings_clear(link);
709 link_dns_settings_clear(link);
710
f535e354
YW		 711 link->routes = set_free_with_destructor(link->routes, route_free);
712 link->routes_foreign = set_free_with_destructor(link->routes_foreign, route_free);
adda1ed9 713
c16c7808
SS		 714 link->nexthops = set_free_with_destructor(link->nexthops, nexthop_free);
715 link->nexthops_foreign = set_free_with_destructor(link->nexthops_foreign, nexthop_free);
716
d1bdafd2
WKI		 717 link->neighbors = set_free_with_destructor(link->neighbors, neighbor_free);
718 link->neighbors_foreign = set_free_with_destructor(link->neighbors_foreign, neighbor_free);
719
f535e354
YW		 720 link->addresses = set_free_with_destructor(link->addresses, address_free);
721 link->addresses_foreign = set_free_with_destructor(link->addresses_foreign, address_free);
adda1ed9 722
11bf3cce
LP		 723 while ((address = link->pool_addresses)) {
724 LIST_REMOVE(addresses, link->pool_addresses, address);
725 address_free(address);
726 }
727
7272b25e 728 link_lldp_emit_stop(link);
1a6bb31f 729 link_free_engines(link);
68a8723c 730 free(link->lease_file);
49699bac
SS		 731 free(link->lldp_file);
732
c166a070 733 free(link->ifname);
572b21d9 734 strv_free(link->alternative_names);
ceac4078 735 free(link->kind);
8d968fdd 736 free(link->ssid);
c643bda5 737 free(link->driver);
6cad256d 738
db2f8a2e 739 (void) unlink(link->state_file);
fe8db0c5 740 free(link->state_file);
c166a070 741
51517f9e 742 sd_device_unref(link->sd_device);
b5db00e5 743
0d4ad91d 744 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 745 hashmap_free(link->bound_by_links);
746
5f707e12 747 set_free_with_destructor(link->slaves, link_unref);
033295c1 748
c9c908a6
YW		 749 network_unref(link->network);
750
8301aa0b 751 return mfree(link);
14b746f7
TG		 752}
753
8301aa0b 754DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 755
11a7f229
TG		 756int link_get(Manager *m, int ifindex, Link **ret) {
757 Link *link;
11a7f229
TG		 758
759 assert(m);
e856ed00 760 assert(ifindex > 0);
11a7f229
TG		 761 assert(ret);
762
ae06ab10 763 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 764 if (!link)
765 return -ENODEV;
766
767 *ret = link;
768
769 return 0;
770}
771
af9ba57a 772void link_set_state(Link *link, LinkState state) {
e331e246
TG		 773 assert(link);
774
775 if (link->state == state)
776 return;
777
0beb9542
YW		 778 log_link_debug(link, "State changed: %s -> %s",
779 link_state_to_string(link->state),
780 link_state_to_string(state));
781
e331e246
TG		 782 link->state = state;
783
784 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 785}
786
57bd6899
TG		 787static void link_enter_unmanaged(Link *link) {
788 assert(link);
789
e331e246 790 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 791
84de38c5 792 link_dirty(link);
57bd6899
TG		 793}
794
95355a28 795int link_stop_clients(Link *link, bool may_keep_dhcp) {
111bb8f9 796 int r = 0, k;
051e77ca 797 Address *ad;
111bb8f9
TG		 798
799 assert(link);
800 assert(link->manager);
801 assert(link->manager->event);
802
d03073dd
YW		 803 dhcp4_release_old_lease(link);
804
80060352
ZJS		 805 bool keep_dhcp = may_keep_dhcp &&
806 link->network &&
807 (link->manager->restarting ||
808 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
809
810 if (link->dhcp_client && !keep_dhcp) {
111bb8f9 811 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 812 if (k < 0)
36c7d709 813 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 814 }
815
ba179154 816 if (link->ipv4ll) {
111bb8f9 817 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 818 if (k < 0)
36c7d709 819 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 820 }
821
051e77ca
SS		 822 if (link->network)
823 LIST_FOREACH(addresses, ad, link->network->static_addresses)
824 if (ad->acd && sd_ipv4acd_is_running(ad->acd) == 0) {
825 k = sd_ipv4acd_stop(ad->acd);
826 if (k < 0)
827 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
828 }
829
f5a8c43f
TG		 830 if (link->dhcp6_client) {
831 k = sd_dhcp6_client_stop(link->dhcp6_client);
832 if (k < 0)
36c7d709 833 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 834 }
4138fb2c 835
1e7a0e21
LP		 836 if (link->ndisc) {
837 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 838 if (k < 0)
36c7d709 839 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 840 }
841
7465dd22 842 if (link->radv) {
290696e5 843 k = sd_radv_stop(link->radv);
7465dd22
PF		 844 if (k < 0)
845 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
846 }
847
7272b25e 848 link_lldp_emit_stop(link);
111bb8f9
TG		 849 return r;
850}
851
b22d8a00 852void link_enter_failed(Link *link) {
ef1ba606 853 assert(link);
f882c247 854
370e9930 855 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 856 return;
857
6a7a4e4d 858 log_link_warning(link, "Failed");
449f7554 859
e331e246 860 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 861
95355a28 862 link_stop_clients(link, false);
111bb8f9 863
84de38c5 864 link_dirty(link);
f882c247
TG		 865}
866
7033af49
YW		 867static int link_join_netdevs_after_configured(Link *link) {
868 NetDev *netdev;
869 Iterator i;
870 int r;
871
872 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
873 if (netdev->ifindex > 0)
874 /* Assume already enslaved. */
875 continue;
876
877 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
878 continue;
879
880 log_struct(LOG_DEBUG,
881 LOG_LINK_INTERFACE(link),
882 LOG_NETDEV_INTERFACE(netdev),
883 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
884
885 r = netdev_join(netdev, link, NULL);
886 if (r < 0)
887 return log_struct_errno(LOG_WARNING, r,
888 LOG_LINK_INTERFACE(link),
889 LOG_NETDEV_INTERFACE(netdev),
890 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
891 }
892
893 return 0;
894}
895
e3a7b048 896static void link_enter_configured(Link *link) {
dd43110f
TG		 897 assert(link);
898 assert(link->network);
e3a7b048 899
289e6774 900 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 901 return;
dd43110f 902
e331e246 903 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 904
7033af49
YW		 905 (void) link_join_netdevs_after_configured(link);
906
84de38c5 907 link_dirty(link);
dd43110f
TG		 908}
909
47079967 910static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 911 RoutingPolicyRule *rule, *rrule = NULL;
912 int r;
913
914 assert(link);
915 assert(link->network);
916
2428613f
YW		 917 link->routing_policy_rules_configured = false;
918
8a9b3a23 919 LIST_FOREACH(rules, rule, link->network->rules) {
b80a511b 920 r = routing_policy_rule_get(link->manager, rule, &rrule);
ff14e2eb
YW		 921 if (r >= 0) {
922 if (r == 0)
923 (void) routing_policy_rule_make_local(link->manager, rrule);
8a9b3a23
SS		 924 continue;
925 }
926
9f08a578 927 r = routing_policy_rule_configure(rule, link, NULL);
4ff296b0
YW		 928 if (r < 0)
929 return log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
7ef7e550
YW		 930 if (r > 0)
931 link->routing_policy_rule_messages++;
8a9b3a23
SS		 932 }
933
934 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 935 if (link->routing_policy_rule_messages == 0) {
936 link->routing_policy_rules_configured = true;
937 link_check_ready(link);
b425c3ae 938 } else {
7715629e 939 log_link_debug(link, "Setting routing policy rules");
b425c3ae
YW		 940 link_set_state(link, LINK_STATE_CONFIGURING);
941 }
8a9b3a23
SS		 942
943 return 0;
944}
945
c16c7808
SS		 946static int nexthop_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
947 int r;
948
949 assert(link);
950 assert(link->nexthop_messages > 0);
951 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
952 LINK_STATE_FAILED, LINK_STATE_LINGER));
953
954 link->nexthop_messages--;
955
956 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
957 return 1;
958
959 r = sd_netlink_message_get_errno(m);
960 if (r < 0 && r != -EEXIST) {
5ecb131d 961 log_link_message_warning_errno(link, m, r, "Could not set nexthop");
c16c7808
SS		 962 link_enter_failed(link);
963 return 1;
964 }
965
966 if (link->nexthop_messages == 0) {
967 log_link_debug(link, "Nexthop set");
968 link->static_nexthops_configured = true;
969 link_check_ready(link);
970 }
971
972 return 1;
973}
974
eb01a2df 975static int link_request_set_nexthop(Link *link) {
c16c7808
SS		 976 NextHop *nh;
977 int r;
978
979 LIST_FOREACH(nexthops, nh, link->network->static_nexthops) {
980 r = nexthop_configure(nh, link, nexthop_handler);
981 if (r < 0)
982 return log_link_warning_errno(link, r, "Could not set nexthop: %m");
983 if (r > 0)
984 link->nexthop_messages++;
985 }
986
987 if (link->nexthop_messages == 0) {
988 link->static_nexthops_configured = true;
989 link_check_ready(link);
990 } else {
991 log_link_debug(link, "Setting nexthop");
992 link_set_state(link, LINK_STATE_CONFIGURING);
993 }
994
995 return 1;
996}
997
302a796f 998static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 999 int r;
1000
1046bf9b 1001 assert(link);
7715629e 1002 assert(link->route_messages > 0);
289e6774
WKI		 1003 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
1004 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1005
7715629e 1006 link->route_messages--;
f882c247 1007
77a008c0 1008 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1009 return 1;
1010
1c4baffc 1011 r = sd_netlink_message_get_errno(m);
4ff296b0 1012 if (r < 0 && r != -EEXIST) {
5ecb131d 1013 log_link_message_warning_errno(link, m, r, "Could not set route");
4ff296b0
YW		 1014 link_enter_failed(link);
1015 return 1;
1016 }
f882c247 1017
7715629e 1018 if (link->route_messages == 0) {
6a7a4e4d 1019 log_link_debug(link, "Routes set");
7715629e 1020 link->static_routes_configured = true;
8012cd39 1021 link_check_ready(link);
dd3efc09 1022 }
f882c247
TG		 1023
1024 return 1;
1025}
1026
b5799eeb 1027int link_request_set_routes(Link *link) {
bf61b05a
LP		 1028 enum {
1029 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
1030 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
1031 _PHASE_MAX
1032 } phase;
a6cc569e 1033 Route *rt;
f882c247
TG		 1034 int r;
1035
1036 assert(link);
1037 assert(link->network);
c42ff3a1
WKI		 1038 assert(link->addresses_configured);
1039 assert(link->address_messages == 0);
289e6774 1040 assert(link->state != _LINK_STATE_INVALID);
f882c247 1041
2428613f 1042 link->static_routes_configured = false;
c16c7808 1043 link->static_routes_ready = false;
27c34f73 1044
4e2ef9d9
YW		 1045 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
1046 /* During configuring addresses, the link lost its carrier. As networkd is dropping
1047 * the addresses now, let's not configure the routes either. */
1048 return 0;
1049
47079967 1050 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 1051 if (r < 0)
1052 return r;
f882c247 1053
bf61b05a
LP		 1054 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
1055 for (phase = 0; phase < _PHASE_MAX; phase++)
1056 LIST_FOREACH(routes, rt, link->network->static_routes) {
1985c54f
YW		 1057 if (rt->gateway_from_dhcp)
1058 continue;
0d34228f 1059
6ff5cc6b 1060 if ((in_addr_is_null(rt->family, &rt->gw) && ordered_set_isempty(rt->multipath_routes)) != (phase == PHASE_NON_GATEWAY))
bf61b05a 1061 continue;
a6cc569e 1062
0d34228f 1063 r = route_configure(rt, link, route_handler);
4ff296b0
YW		 1064 if (r < 0)
1065 return log_link_warning_errno(link, r, "Could not set routes: %m");
c4423317
YW		 1066 if (r > 0)
1067 link->route_messages++;
0d34228f 1068 }
f5be5601 1069
7715629e
ST		 1070 if (link->route_messages == 0) {
1071 link->static_routes_configured = true;
8012cd39 1072 link_check_ready(link);
b425c3ae 1073 } else {
6a7a4e4d 1074 log_link_debug(link, "Setting routes");
b425c3ae
YW		 1075 link_set_state(link, LINK_STATE_CONFIGURING);
1076 }
f882c247
TG		 1077
1078 return 0;
1079}
1080
6accfd31
DA		 1081void link_check_ready(Link *link) {
1082 Address *a;
1083 Iterator i;
4ff296b0 1084 int r;
6accfd31
DA		 1085
1086 assert(link);
1087
39373cb9
YW		 1088 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) {
1089 log_link_debug(link, "%s(): link is in failed or linger state.", __func__);
6accfd31 1090 return;
39373cb9 1091 }
6accfd31
DA		 1092
1093 if (!link->network)
1094 return;
1095
39373cb9
YW		 1096 if (!link->addresses_configured) {
1097 log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 1098 return;
39373cb9 1099 }
6accfd31 1100
39373cb9
YW		 1101 if (!link->neighbors_configured) {
1102 log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
6accfd31 1103 return;
39373cb9 1104 }
6accfd31 1105
6aa5773b 1106 SET_FOREACH(a, link->addresses, i)
39373cb9
YW		 1107 if (!address_is_ready(a)) {
1108 _cleanup_free_ char *str = NULL;
1109
1110 (void) in_addr_to_string(a->family, &a->in_addr, &str);
1111 log_link_debug(link, "%s(): an address %s/%d is not ready.", __func__, strnull(str), a->prefixlen);
6aa5773b 1112 return;
39373cb9 1113 }
6aa5773b
DA		 1114
1115 if (!link->addresses_ready) {
1116 link->addresses_ready = true;
4ff296b0
YW		 1117 r = link_request_set_routes(link);
1118 if (r < 0)
1119 link_enter_failed(link);
39373cb9 1120 log_link_debug(link, "%s(): static addresses are configured. Configuring static routes.", __func__);
710ce9e5 1121 return;
6aa5773b
DA		 1122 }
1123
39373cb9
YW		 1124 if (!link->static_routes_configured) {
1125 log_link_debug(link, "%s(): static routes are not configured.", __func__);
6accfd31 1126 return;
39373cb9 1127 }
6accfd31 1128
c16c7808
SS		 1129 if (!link->static_routes_ready) {
1130 link->static_routes_ready = true;
1131 r = link_request_set_nexthop(link);
1132 if (r < 0)
1133 link_enter_failed(link);
39373cb9 1134 log_link_debug(link, "%s(): static routes are configured. Configuring static nexthops.", __func__);
c16c7808
SS		 1135 return;
1136 }
1137
39373cb9
YW		 1138 if (!link->static_nexthops_configured) {
1139 log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 1140 return;
39373cb9 1141 }
c16c7808 1142
39373cb9
YW		 1143 if (!link->routing_policy_rules_configured) {
1144 log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 1145 return;
39373cb9 1146 }
6accfd31 1147
39373cb9
YW		 1148 if (!link->tc_configured) {
1149 log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
4ecdcb07 1150 return;
39373cb9 1151 }
4ecdcb07 1152
39373cb9
YW		 1153 if (!link->sr_iov_configured) {
1154 log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 1155 return;
39373cb9 1156 }
518cd6b5 1157
463797c1 1158 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
6accfd31 1159
39373cb9
YW		 1160 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !link->ipv4ll_address) {
1161 log_link_debug(link, "%s(): IPv4LL is not configured.", __func__);
463797c1 1162 return;
39373cb9 1163 }
6accfd31 1164
463797c1 1165 if (link_ipv6ll_enabled(link) &&
39373cb9
YW		 1166 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
1167 log_link_debug(link, "%s(): IPv6LL is not configured.", __func__);
463797c1 1168 return;
39373cb9 1169 }
6accfd31 1170
39373cb9
YW		 1171 if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || dhcp6_get_prefix_delegation(link) || link_ipv6_accept_ra_enabled(link)) {
1172 if (!link->dhcp4_configured &&
1173 !(link->dhcp6_address_configured && link->dhcp6_route_configured) &&
1174 !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) &&
1175 !link->ndisc_configured &&
1176 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address)) {
1177 /* When DHCP or RA is enabled, at least one protocol must provide an address, or
1178 * an IPv4ll fallback address must be configured. */
1179 log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
1180 return;
1181 }
1182
1183 log_link_debug(link, "%s(): dhcp4:%s dhcp6_addresses:%s dhcp_routes:%s dhcp_pd_addresses:%s dhcp_pd_routes:%s ndisc:%s",
1184 __func__,
1185 yes_no(link->dhcp4_configured),
1186 yes_no(link->dhcp6_address_configured),
1187 yes_no(link->dhcp6_route_configured),
1188 yes_no(link->dhcp6_pd_address_configured),
1189 yes_no(link->dhcp6_pd_route_configured),
1190 yes_no(link->ndisc_configured));
1191 }
463797c1 1192 }
6accfd31 1193
6accfd31
DA		 1194 if (link->state != LINK_STATE_CONFIGURED)
1195 link_enter_configured(link);
1196
1197 return;
1198}
1199
e4a71bf3
WKI		 1200static int link_request_set_neighbors(Link *link) {
1201 Neighbor *neighbor;
1202 int r;
1203
1204 assert(link);
1205 assert(link->network);
1206 assert(link->state != _LINK_STATE_INVALID);
1207
2428613f 1208 link->neighbors_configured = false;
e4a71bf3
WKI		 1209
1210 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
1211 r = neighbor_configure(neighbor, link, NULL);
4ff296b0
YW		 1212 if (r < 0)
1213 return log_link_warning_errno(link, r, "Could not set neighbor: %m");
e4a71bf3
WKI		 1214 }
1215
1216 if (link->neighbor_messages == 0) {
1217 link->neighbors_configured = true;
1218 link_check_ready(link);
b425c3ae 1219 } else {
e4a71bf3 1220 log_link_debug(link, "Setting neighbors");
b425c3ae
YW		 1221 link_set_state(link, LINK_STATE_CONFIGURING);
1222 }
e4a71bf3
WKI		 1223
1224 return 0;
1225}
1226
3650173f 1227static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1228 int r;
1229
4958aee4 1230 assert(rtnl);
f5be5601
TG		 1231 assert(m);
1232 assert(link);
1233 assert(link->ifname);
7715629e 1234 assert(link->address_messages > 0);
289e6774 1235 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1236 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1237
7715629e 1238 link->address_messages--;
f882c247 1239
5da8149f 1240 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1241 return 1;
1242
1c4baffc 1243 r = sd_netlink_message_get_errno(m);
4ff296b0 1244 if (r < 0 && r != -EEXIST) {
5ecb131d 1245 log_link_message_warning_errno(link, m, r, "Could not set address");
4ff296b0
YW		 1246 link_enter_failed(link);
1247 return 1;
1248 } else if (r >= 0)
1249 (void) manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1250
7715629e 1251 if (link->address_messages == 0) {
6a7a4e4d 1252 log_link_debug(link, "Addresses set");
c42ff3a1 1253 link->addresses_configured = true;
6aa5773b 1254 link_check_ready(link);
dd3efc09 1255 }
f882c247
TG		 1256
1257 return 1;
1258}
1259
f6bb7ac5
TJ		 1260static int link_set_bridge_fdb(Link *link) {
1261 FdbEntry *fdb_entry;
197e2809 1262 int r;
f6bb7ac5
TJ		 1263
1264 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1265 r = fdb_entry_configure(link, fdb_entry);
197e2809 1266 if (r < 0)
f6bb7ac5 1267 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1268 }
1269
197e2809 1270 return 0;
f6bb7ac5
TJ		 1271}
1272
289e6774 1273static int link_request_set_addresses(Link *link) {
95b74ef6 1274 AddressLabel *label;
a6cc569e 1275 Address *ad;
bd6379ec 1276 Prefix *p;
f882c247
TG		 1277 int r;
1278
1279 assert(link);
1280 assert(link->network);
f5be5601 1281 assert(link->state != _LINK_STATE_INVALID);
f882c247 1282
2428613f
YW		 1283 /* Reset all *_configured flags we are configuring. */
1284 link->addresses_configured = false;
6aa5773b 1285 link->addresses_ready = false;
2428613f
YW		 1286 link->neighbors_configured = false;
1287 link->static_routes_configured = false;
c16c7808
SS		 1288 link->static_routes_ready = false;
1289 link->static_nexthops_configured = false;
2428613f
YW		 1290 link->routing_policy_rules_configured = false;
1291
f6bb7ac5
TJ		 1292 r = link_set_bridge_fdb(link);
1293 if (r < 0)
1294 return r;
1295
f3ef324d
YW		 1296 r = link_request_set_neighbors(link);
1297 if (r < 0)
1298 return r;
e4a71bf3 1299
3d3d4255 1300 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1301 bool update;
1302
1303 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1304
1305 r = address_configure(ad, link, address_handler, update);
4ff296b0
YW		 1306 if (r < 0)
1307 return log_link_warning_errno(link, r, "Could not set addresses: %m");
54a1a535
YW		 1308 if (r > 0)
1309 link->address_messages++;
95b74ef6
SS		 1310 }
1311
bd6379ec
SS		 1312 if (IN_SET(link->network->router_prefix_delegation,
1313 RADV_PREFIX_DELEGATION_STATIC,
1314 RADV_PREFIX_DELEGATION_BOTH))
1315 LIST_FOREACH(prefixes, p, link->network->static_prefixes) {
1316 _cleanup_(address_freep) Address *address = NULL;
1317
1318 if (!p->assign)
1319 continue;
1320
1321 r = address_new(&address);
1322 if (r < 0)
1323 return log_link_error_errno(link, r, "Could not allocate address: %m");
1324
1325 r = sd_radv_prefix_get_prefix(p->radv_prefix, &address->in_addr.in6, &address->prefixlen);
1326 if (r < 0)
1327 return r;
1328
1329 r = generate_ipv6_eui_64_address(link, &address->in_addr.in6);
1330 if (r < 0)
1331 return r;
1332
1333 address->family = AF_INET6;
1334 r = address_configure(address, link, address_handler, true);
1335 if (r < 0)
1336 return log_link_warning_errno(link, r, "Could not set addresses: %m");
1337 if (r > 0)
1338 link->address_messages++;
1339 }
1340
95b74ef6 1341 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1342 r = address_label_configure(label, link, NULL, false);
4ff296b0
YW		 1343 if (r < 0)
1344 return log_link_warning_errno(link, r, "Could not set address label: %m");
f5be5601 1345
7715629e 1346 link->address_label_messages++;
f882c247
TG		 1347 }
1348
d4cdbea5
TG		 1349 /* now that we can figure out a default address for the dhcp server,
1350 start it */
708c425d 1351 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
8fcf1d61 1352 r = dhcp4_server_configure(link);
4ff296b0 1353 if (r < 0)
d4cdbea5 1354 return r;
6a7a4e4d 1355 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1356 }
1357
c42ff3a1
WKI		 1358 if (link->address_messages == 0) {
1359 link->addresses_configured = true;
6aa5773b 1360 link_check_ready(link);
b425c3ae 1361 } else {
6a7a4e4d 1362 log_link_debug(link, "Setting addresses");
b425c3ae
YW		 1363 link_set_state(link, LINK_STATE_CONFIGURING);
1364 }
431ca2ce 1365
f882c247
TG		 1366 return 0;
1367}
1368
13b498f9 1369static int link_set_bridge_vlan(Link *link) {
86e2be7b 1370 int r;
13b498f9
TJ		 1371
1372 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1373 if (r < 0)
1374 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1375
1376 return r;
1377}
1378
a60a720c 1379static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1380 int r;
1381
1382 if (!link_proxy_arp_enabled(link))
1383 return 0;
1384
62e021a9 1385 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1386 if (r < 0)
1387 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1388
1389 return 0;
1390}
1391
3a390124 1392static int link_configure_continue(Link *link);
55dc8c4a 1393
302a796f 1394static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1395 int r;
1396
1397 assert(m);
1398 assert(link);
1399 assert(link->ifname);
1400
55dc8c4a
YW		 1401 link->setting_mtu = false;
1402
5da8149f 1403 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1404 return 1;
1405
1c4baffc 1406 r = sd_netlink_message_get_errno(m);
4ff296b0 1407 if (r < 0)
5ecb131d 1408 log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring");
4ff296b0
YW		 1409 else
1410 log_link_debug(link, "Setting MTU done.");
55dc8c4a 1411
4ff296b0 1412 if (link->state == LINK_STATE_INITIALIZED) {
3a390124 1413 r = link_configure_continue(link);
4ff296b0
YW		 1414 if (r < 0)
1415 link_enter_failed(link);
1416 }
4f882b2a
TG		 1417
1418 return 1;
1419}
1420
933c70a0 1421int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1422 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1423 int r;
1424
1425 assert(link);
1426 assert(link->manager);
1427 assert(link->manager->rtnl);
1428
40288ece
YW		 1429 if (mtu == 0 || link->setting_mtu)
1430 return 0;
1431
933c70a0 1432 if (link->mtu == mtu)
ee493106
YW		 1433 return 0;
1434
6a7a4e4d 1435 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1436
6a7a4e4d
LP		 1437 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1438 if (r < 0)
1439 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1440
44b598a1 1441 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1442 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1443 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1444
1445 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
d236718c 1446 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes");
44b598a1 1447
72c2500b 1448 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1449 }
1450
1c4baffc 1451 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1452 if (r < 0)
1453 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1454
302a796f
YW		 1455 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1456 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1457 if (r < 0)
1458 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1459
ae941762 1460 link_ref(link);
1046bf9b 1461 link->setting_mtu = true;
b226d99b 1462
4f882b2a
TG		 1463 return 0;
1464}
1465
f6fcc1c2
YW		 1466static bool link_reduces_vlan_mtu(Link *link) {
1467 /* See netif_reduces_vlan_mtu() in kernel. */
1468 return streq_ptr(link->kind, "macsec");
1469}
1470
1471static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1472 uint32_t mtu = 0;
1473 NetDev *dev;
1474 Iterator i;
1475
1476 HASHMAP_FOREACH(dev, link->network->stacked_netdevs, i)
1477 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1478 /* See vlan_dev_change_mtu() in kernel. */
1479 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1480
1481 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1482 /* See macvlan_change_mtu() in kernel. */
1483 mtu = dev->mtu;
1484
1485 return mtu;
1486}
1487
1488static int link_configure_mtu(Link *link) {
1489 uint32_t mtu;
1490
1491 assert(link);
1492 assert(link->network);
1493
1494 if (link->network->mtu > 0)
1495 return link_set_mtu(link, link->network->mtu);
1496
1497 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1498 if (link->mtu >= mtu)
1499 return 0;
1500
1501 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1502 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1503 link->mtu, mtu);
1504
1505 return link_set_mtu(link, mtu);
1506}
1507
302a796f 1508static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1509 int r;
1510
1511 assert(m);
1512 assert(link);
1513 assert(link->ifname);
1514
1515 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1516 return 1;
1517
1518 r = sd_netlink_message_get_errno(m);
1519 if (r < 0)
5ecb131d 1520 log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring");
99d2baa2
SS		 1521
1522 return 1;
1523}
1524
1525static int link_set_flags(Link *link) {
1526 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1527 unsigned ifi_change = 0;
1528 unsigned ifi_flags = 0;
1529 int r;
1530
1531 assert(link);
1532 assert(link->manager);
1533 assert(link->manager->rtnl);
1534
1535 if (link->flags & IFF_LOOPBACK)
1536 return 0;
1537
1538 if (!link->network)
1539 return 0;
1540
866e6b7a 1541 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1542 return 0;
1543
1544 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1545 if (r < 0)
1546 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1547
1548 if (link->network->arp >= 0) {
1549 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1550 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1551 }
1552
1553 if (link->network->multicast >= 0) {
1554 ifi_change |= IFF_MULTICAST;
1555 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1556 }
1557
866e6b7a
SS		 1558 if (link->network->allmulticast >= 0) {
1559 ifi_change |= IFF_ALLMULTI;
1560 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1561 }
1562
99d2baa2
SS		 1563 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1564 if (r < 0)
1565 return log_link_error_errno(link, r, "Could not set link flags: %m");
1566
302a796f
YW		 1567 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1568 link_netlink_destroy_callback, link);
99d2baa2
SS		 1569 if (r < 0)
1570 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1571
1572 link_ref(link);
1573
1574 return 0;
1575}
1576
e7ab854c
TG		 1577static int link_acquire_ipv6_conf(Link *link) {
1578 int r;
1579
1580 assert(link);
1581
e7ab854c 1582 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1583 assert(link->ndisc);
e7ab854c
TG		 1584
1585 log_link_debug(link, "Discovering IPv6 routers");
1586
1e7a0e21 1587 r = sd_ndisc_start(link->ndisc);
63348d13 1588 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1589 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1590 }
1591
7465dd22
PF		 1592 if (link_radv_enabled(link)) {
1593 assert(link->radv);
1594 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1595
1596 log_link_debug(link, "Starting IPv6 Router Advertisements");
1597
fd3ef936
YW		 1598 r = radv_emit_dns(link);
1599 if (r < 0)
1600 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
1601
7465dd22
PF		 1602 r = sd_radv_start(link->radv);
1603 if (r < 0 && r != -EBUSY)
1604 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1605 }
1606
838d39af
SS		 1607 if (link_dhcp6_enabled(link) && IN_SET(link->network->dhcp6_without_ra,
1608 DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST,
1609 DHCP6_CLIENT_START_MODE_SOLICIT)) {
cd305af1
SS		 1610 assert(link->dhcp6_client);
1611 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1612
838d39af 1613 r = dhcp6_request_address(link, link->network->dhcp6_without_ra == DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST);
cd305af1
SS		 1614 if (r < 0 && r != -EBUSY)
1615 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
1616 else
1617 log_link_debug(link, "Acquiring DHCPv6 lease");
1618 }
1619
10752343
PF		 1620 (void) dhcp6_request_prefix_delegation(link);
1621
e7ab854c
TG		 1622 return 0;
1623}
1624
6fc25497 1625static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1626 int r;
1627
1628 assert(link);
ff254138
TG		 1629 assert(link->manager);
1630 assert(link->manager->event);
1631
910feb78 1632 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1633 assert(link->ipv4ll);
ff254138 1634
6a7a4e4d 1635 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1636
1637 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1638 if (r < 0)
1639 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1640 }
1641
78c958f8 1642 if (link_dhcp4_enabled(link)) {
eb34d4af 1643 assert(link->dhcp_client);
ff254138 1644
6a7a4e4d 1645 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1646
5c1d3fc9 1647 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1648 if (r < 0)
1649 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1650 }
ff254138 1651
6fc25497
SS		 1652 return 0;
1653}
1654
1655static int link_acquire_conf(Link *link) {
1656 int r;
1657
1658 assert(link);
1659
1660 r = link_acquire_ipv4_conf(link);
1661 if (r < 0)
1662 return r;
1663
3f7cc080 1664 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1665 r = link_acquire_ipv6_conf(link);
1666 if (r < 0)
1667 return r;
1668 }
1669
7272b25e
LP		 1670 if (link_lldp_emit_enabled(link)) {
1671 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1672 if (r < 0)
1673 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1674 }
1675
ff254138
TG		 1676 return 0;
1677}
1678
a61bb41c 1679bool link_has_carrier(Link *link) {
deb2e523
TG		 1680 /* see Documentation/networking/operstates.txt in the kernel sources */
1681
a61bb41c 1682 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1683 return true;
1684
a61bb41c 1685 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1686 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1687 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1688 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1689 return true;
1690
1691 return false;
1692}
1693
0e2fdb83
SS		 1694static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1695 int r;
1696
1697 assert(link);
1698
9524014e
DS		 1699 link->setting_genmode = false;
1700
0e2fdb83
SS		 1701 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1702 return 1;
1703
1704 r = sd_netlink_message_get_errno(m);
1705 if (r < 0)
5ecb131d 1706 log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring");
9524014e
DS		 1707 else
1708 log_link_debug(link, "Setting address genmode done.");
1709
1710 if (link->state == LINK_STATE_INITIALIZED) {
1711 r = link_configure_continue(link);
1712 if (r < 0)
1713 link_enter_failed(link);
1714 }
0e2fdb83
SS		 1715
1716 return 1;
1717}
1718
1719static int link_configure_addrgen_mode(Link *link) {
1720 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1721 uint8_t ipv6ll_mode;
1722 int r;
1723
1724 assert(link);
1725 assert(link->network);
1726 assert(link->manager);
1727 assert(link->manager->rtnl);
1728
9524014e 1729 if (!socket_ipv6_is_supported() || link->setting_genmode)
9f6e82e6
YW		 1730 return 0;
1731
0e2fdb83
SS		 1732 log_link_debug(link, "Setting address genmode for link");
1733
1734 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1735 if (r < 0)
1736 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1737
1738 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1739 if (r < 0)
1740 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1741
1742 r = sd_netlink_message_open_container(req, AF_INET6);
1743 if (r < 0)
1744 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1745
1746 if (!link_ipv6ll_enabled(link))
1747 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
6f6296b9 1748 else if (link->network->ipv6ll_address_gen_mode < 0) {
a6f1848a
SS		 1749 r = sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL);
1750 if (r < 0) {
1751 /* The file may not exist. And even if it exists, when stable_secret is unset,
1752 * reading the file fails with EIO. */
1753 log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret: %m");
1754
1755 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1756 } else
1757 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1758 } else
6f6296b9 1759 ipv6ll_mode = link->network->ipv6ll_address_gen_mode;
0e2fdb83
SS		 1760
1761 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1762 if (r < 0)
1763 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1764
1765 r = sd_netlink_message_close_container(req);
1766 if (r < 0)
1767 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1768
1769 r = sd_netlink_message_close_container(req);
1770 if (r < 0)
1771 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1772
1773 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1774 link_netlink_destroy_callback, link);
1775 if (r < 0)
1776 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1777
1778 link_ref(link);
9524014e 1779 link->setting_genmode = true;
0e2fdb83
SS		 1780
1781 return 0;
1782}
1783
302a796f 1784static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1785 int r;
1786
1746cf2a
TG		 1787 assert(link);
1788
5da8149f 1789 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1790 return 1;
1791
1c4baffc 1792 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1793 if (r < 0)
26d6b214 1794 /* we warn but don't fail the link, as it may be brought up later */
5ecb131d 1795 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
45ad2c13 1796
f882c247
TG		 1797 return 1;
1798}
1799
1cc84f3b 1800static int link_up(Link *link) {
4afd3348 1801 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1802 int r;
1803
f882c247 1804 assert(link);
c106cc36 1805 assert(link->network);
f882c247
TG		 1806 assert(link->manager);
1807 assert(link->manager->rtnl);
1808
6a7a4e4d 1809 log_link_debug(link, "Bringing link up");
449f7554 1810
6a7a4e4d
LP		 1811 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1812 if (r < 0)
1813 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1814
2b2d8603 1815 /* set it free if not enslaved with networkd */
6cb955c6 1816 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1817 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1818 if (r < 0)
1819 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1820 }
1821
5d4795f3 1822 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1823 if (r < 0)
1824 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1825
c106cc36 1826 if (link->network->mac) {
1c4baffc 1827 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1828 if (r < 0)
1829 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1830 }
1831
302a796f
YW		 1832 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1833 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1834 if (r < 0)
1835 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1836
b226d99b
TG		 1837 link_ref(link);
1838
f882c247
TG		 1839 return 0;
1840}
1841
302a796f 1842static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1843 int r;
1844
1845 assert(link);
1846
1847 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1848 return 1;
1849
1c4baffc 1850 r = sd_netlink_message_get_errno(m);
0d4ad91d 1851 if (r < 0)
5ecb131d 1852 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
0d4ad91d
AR		 1853
1854 return 1;
1855}
1856
8e54db83 1857int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1858 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1859 int r;
1860
1861 assert(link);
1862 assert(link->manager);
1863 assert(link->manager->rtnl);
1864
6a7a4e4d 1865 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1866
1867 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1868 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1869 if (r < 0)
1870 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1871
1872 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1873 if (r < 0)
1874 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1875
8e54db83
YW		 1876 r = netlink_call_async(link->manager->rtnl, NULL, req,
1877 callback ?: link_down_handler,
302a796f 1878 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1879 if (r < 0)
1880 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1881
1882 link_ref(link);
1883
1884 return 0;
1885}
1886
89fe6535
SS		 1887static int link_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1888 int r;
1889
1890 assert(link);
1891
1892 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1893 return 1;
1894
1895 r = sd_netlink_message_get_errno(m);
1896 if (r < 0)
1897 log_link_message_warning_errno(link, m, r, "Could not set group for the interface");
1898
1899 return 1;
1900}
1901
1902static int link_set_group(Link *link) {
1903 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1904 int r;
1905
1906 assert(link);
1907 assert(link->network);
1908 assert(link->manager);
1909 assert(link->manager->rtnl);
1910
1911 if (link->network->group <= 0)
1912 return 0;
1913
1914 log_link_debug(link, "Setting group");
1915
1916 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1917 if (r < 0)
1918 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1919
1920 r = sd_netlink_message_append_u32(req, IFLA_GROUP, link->network->group);
1921 if (r < 0)
1922 return log_link_error_errno(link, r, "Could not set link group: %m");
1923
1924 r = netlink_call_async(link->manager->rtnl, NULL, req, link_group_handler,
1925 link_netlink_destroy_callback, link);
1926 if (r < 0)
1927 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1928
1929 link_ref(link);
1930
1931 return 0;
1932}
1933
0d4ad91d
AR		 1934static int link_handle_bound_to_list(Link *link) {
1935 Link *l;
1936 Iterator i;
1937 int r;
1938 bool required_up = false;
1939 bool link_is_up = false;
1940
1941 assert(link);
1942
1943 if (hashmap_isempty(link->bound_to_links))
1944 return 0;
1945
1946 if (link->flags & IFF_UP)
1947 link_is_up = true;
1948
1949 HASHMAP_FOREACH (l, link->bound_to_links, i)
1950 if (link_has_carrier(l)) {
1951 required_up = true;
1952 break;
1953 }
1954
1955 if (!required_up && link_is_up) {
8e54db83 1956 r = link_down(link, NULL);
0d4ad91d
AR		 1957 if (r < 0)
1958 return r;
1959 } else if (required_up && !link_is_up) {
1960 r = link_up(link);
1961 if (r < 0)
1962 return r;
1963 }
1964
1965 return 0;
1966}
1967
1968static int link_handle_bound_by_list(Link *link) {
1969 Iterator i;
1970 Link *l;
1971 int r;
1972
1973 assert(link);
1974
1975 if (hashmap_isempty(link->bound_by_links))
1976 return 0;
1977
1978 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1979 r = link_handle_bound_to_list(l);
1980 if (r < 0)
1981 return r;
1982 }
1983
1984 return 0;
1985}
1986
1987static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1988 int r;
1989
1990 assert(link);
1991 assert(carrier);
1992
1993 if (link == carrier)
1994 return 0;
1995
1996 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1997 return 0;
1998
1999 r = hashmap_ensure_allocated(h, NULL);
2000 if (r < 0)
2001 return r;
2002
2003 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
2004 if (r < 0)
2005 return r;
2006
2007 return 0;
2008}
2009
2010static int link_new_bound_by_list(Link *link) {
2011 Manager *m;
2012 Link *carrier;
2013 Iterator i;
2014 int r;
2015 bool list_updated = false;
2016
2017 assert(link);
2018 assert(link->manager);
2019
2020 m = link->manager;
2021
b295beea 2022 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 2023 if (!carrier->network)
2024 continue;
2025
2026 if (strv_isempty(carrier->network->bind_carrier))
2027 continue;
2028
191a3f16 2029 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 2030 r = link_put_carrier(link, carrier, &link->bound_by_links);
2031 if (r < 0)
2032 return r;
2033
2034 list_updated = true;
2035 }
2036 }
2037
2038 if (list_updated)
84de38c5 2039 link_dirty(link);
0d4ad91d 2040
b295beea 2041 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 2042 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2043 if (r < 0)
2044 return r;
2045
84de38c5 2046 link_dirty(carrier);
0d4ad91d
AR		 2047 }
2048
2049 return 0;
2050}
2051
2052static int link_new_bound_to_list(Link *link) {
2053 Manager *m;
2054 Link *carrier;
2055 Iterator i;
2056 int r;
2057 bool list_updated = false;
2058
2059 assert(link);
2060 assert(link->manager);
2061
2062 if (!link->network)
2063 return 0;
2064
2065 if (strv_isempty(link->network->bind_carrier))
2066 return 0;
2067
2068 m = link->manager;
2069
2070 HASHMAP_FOREACH (carrier, m->links, i) {
191a3f16 2071 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 2072 r = link_put_carrier(link, carrier, &link->bound_to_links);
2073 if (r < 0)
2074 return r;
2075
2076 list_updated = true;
2077 }
2078 }
2079
2080 if (list_updated)
84de38c5 2081 link_dirty(link);
0d4ad91d
AR		 2082
2083 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2084 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2085 if (r < 0)
2086 return r;
2087
84de38c5 2088 link_dirty(carrier);
0d4ad91d
AR		 2089 }
2090
2091 return 0;
2092}
2093
2094static int link_new_carrier_maps(Link *link) {
2095 int r;
2096
2097 r = link_new_bound_by_list(link);
2098 if (r < 0)
2099 return r;
2100
2101 r = link_handle_bound_by_list(link);
2102 if (r < 0)
2103 return r;
2104
2105 r = link_new_bound_to_list(link);
2106 if (r < 0)
2107 return r;
2108
2109 r = link_handle_bound_to_list(link);
2110 if (r < 0)
2111 return r;
2112
2113 return 0;
2114}
2115
2116static void link_free_bound_to_list(Link *link) {
2117 Link *bound_to;
2118 Iterator i;
2119
2120 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2121 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2122
2123 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2124 link_dirty(bound_to);
0d4ad91d
AR		 2125 }
2126
2127 return;
2128}
2129
2130static void link_free_bound_by_list(Link *link) {
2131 Link *bound_by;
2132 Iterator i;
2133
2134 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2135 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2136
2137 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2138 link_dirty(bound_by);
0d4ad91d
AR		 2139 link_handle_bound_to_list(bound_by);
2140 }
2141 }
2142
2143 return;
2144}
2145
2146static void link_free_carrier_maps(Link *link) {
2147 bool list_updated = false;
2148
2149 assert(link);
2150
2151 if (!hashmap_isempty(link->bound_to_links)) {
2152 link_free_bound_to_list(link);
2153 list_updated = true;
2154 }
2155
2156 if (!hashmap_isempty(link->bound_by_links)) {
2157 link_free_bound_by_list(link);
2158 list_updated = true;
2159 }
2160
2161 if (list_updated)
84de38c5 2162 link_dirty(link);
0d4ad91d
AR		 2163
2164 return;
2165}
2166
5f707e12
YW		 2167static int link_append_to_master(Link *link, NetDev *netdev) {
2168 Link *master;
2169 int r;
2170
2171 assert(link);
2172 assert(netdev);
2173
2174 r = link_get(link->manager, netdev->ifindex, &master);
2175 if (r < 0)
2176 return r;
2177
de7fef4b 2178 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 2179 if (r <= 0)
5f707e12
YW		 2180 return r;
2181
2182 link_ref(link);
2183 return 0;
2184}
2185
2186static void link_drop_from_master(Link *link, NetDev *netdev) {
2187 Link *master;
2188
2189 assert(link);
2190
2191 if (!link->manager || !netdev)
2192 return;
2193
2194 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2195 return;
2196
2197 link_unref(set_remove(master->slaves, link));
2198}
2199
2200static void link_detach_from_manager(Link *link) {
2201 if (!link || !link->manager)
2202 return;
2203
2204 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2205 link_clean(link);
2206
2207 /* The following must be called at last. */
2208 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2209 link_unref(link);
2210}
2211
0d4ad91d
AR		 2212void link_drop(Link *link) {
2213 if (!link || link->state == LINK_STATE_LINGER)
2214 return;
2215
2216 link_set_state(link, LINK_STATE_LINGER);
2217
2218 link_free_carrier_maps(link);
2219
5f707e12
YW		 2220 if (link->network) {
2221 link_drop_from_master(link, link->network->bridge);
2222 link_drop_from_master(link, link->network->bond);
2223 }
2224
6a7a4e4d 2225 log_link_debug(link, "Link removed");
0d4ad91d 2226
db2f8a2e 2227 (void) unlink(link->state_file);
c4397d94 2228 link_detach_from_manager(link);
0d4ad91d
AR		 2229}
2230
3f265037 2231static int link_joined(Link *link) {
f882c247
TG		 2232 int r;
2233
ef1ba606 2234 assert(link);
f5be5601 2235 assert(link->network);
dd3efc09 2236
0d4ad91d
AR		 2237 if (!hashmap_isempty(link->bound_to_links)) {
2238 r = link_handle_bound_to_list(link);
2239 if (r < 0)
2240 return r;
2241 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2242 r = link_up(link);
2243 if (r < 0) {
2244 link_enter_failed(link);
2245 return r;
2246 }
ef1ba606 2247 }
f882c247 2248
9ed794a3 2249 if (link->network->bridge) {
e1853b00 2250 r = link_set_bridge(link);
6a7a4e4d
LP		 2251 if (r < 0)
2252 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 2253
2254 r = link_append_to_master(link, link->network->bridge);
2255 if (r < 0)
2256 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 2257 }
2258
eb64b435 2259 if (link->network->bond) {
7fcee284 2260 r = link_set_bond(link);
eb64b435
SS		 2261 if (r < 0)
2262 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2263
45e11abf 2264 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2265 if (r < 0)
2266 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2267 }
2268
ffff9abe
TJ		 2269 if (link->network->use_br_vlan &&
2270 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2271 r = link_set_bridge_vlan(link);
2272 if (r < 0)
2273 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2274 }
2275
c1835a42
RM		 2276 /* Skip setting up addresses until it gets carrier,
2277 or it would try to set addresses twice,
2278 which is bad for non-idempotent steps. */
dad2d78e 2279 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2280 return 0;
2281
b425c3ae 2282 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 2283 return link_request_set_addresses(link);
02b59d57
TG		 2284}
2285
302a796f 2286static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2287 int r;
2288
1746cf2a 2289 assert(link);
ef1ba606 2290 assert(link->network);
34bf3c00 2291 assert(link->enslaving > 0);
02b59d57 2292
313cefa1 2293 link->enslaving--;
52433f6b 2294
5da8149f 2295 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2296 return 1;
2297
1c4baffc 2298 r = sd_netlink_message_get_errno(m);
856f962c 2299 if (r < 0 && r != -EEXIST) {
5ecb131d 2300 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG		 2301 link_enter_failed(link);
2302 return 1;
4ff296b0
YW		 2303 }
2304
2305 log_link_debug(link, "Joined netdev");
02b59d57 2306
34bf3c00 2307 if (link->enslaving == 0) {
4ff296b0
YW		 2308 r = link_joined(link);
2309 if (r < 0)
2310 link_enter_failed(link);
34bf3c00 2311 }
02b59d57
TG		 2312
2313 return 1;
2314}
2315
3f265037 2316static int link_enter_join_netdev(Link *link) {
6a0a2f86 2317 NetDev *netdev;
672682a6 2318 Iterator i;
02b59d57
TG		 2319 int r;
2320
2321 assert(link);
2322 assert(link->network);
bd08ce56 2323 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2324
289e6774 2325 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2326
84de38c5 2327 link_dirty(link);
34bf3c00 2328 link->enslaving = 0;
02b59d57 2329
d9c67ea1 2330 if (link->network->bond) {
cbff7170
TJ		 2331 if (link->network->bond->state == NETDEV_STATE_READY &&
2332 link->network->bond->ifindex == link->master_ifindex)
2333 return link_joined(link);
2334
f2341e0a
LP		 2335 log_struct(LOG_DEBUG,
2336 LOG_LINK_INTERFACE(link),
2337 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2338 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2339
34bf3c00
YW		 2340 link->enslaving++;
2341
f2341e0a 2342 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2343 if (r < 0) {
f2341e0a
LP		 2344 log_struct_errno(LOG_WARNING, r,
2345 LOG_LINK_INTERFACE(link),
2346 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2347 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2348 link_enter_failed(link);
2349 return r;
2350 }
0ad6148e
MO		 2351 }
2352
d9c67ea1 2353 if (link->network->bridge) {
f2341e0a
LP		 2354 log_struct(LOG_DEBUG,
2355 LOG_LINK_INTERFACE(link),
2356 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2357 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2358
34bf3c00
YW		 2359 link->enslaving++;
2360
f2341e0a 2361 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2362 if (r < 0) {
f2341e0a
LP		 2363 log_struct_errno(LOG_WARNING, r,
2364 LOG_LINK_INTERFACE(link),
2365 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2366 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2367 link_enter_failed(link);
2368 return r;
2369 }
52433f6b
TG		 2370 }
2371
6cb955c6
AR		 2372 if (link->network->vrf) {
2373 log_struct(LOG_DEBUG,
2374 LOG_LINK_INTERFACE(link),
2375 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2376 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2377
34bf3c00
YW		 2378 link->enslaving++;
2379
6cb955c6
AR		 2380 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2381 if (r < 0) {
2382 log_struct_errno(LOG_WARNING, r,
2383 LOG_LINK_INTERFACE(link),
2384 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2385 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2386 link_enter_failed(link);
2387 return r;
2388 }
6cb955c6
AR		 2389 }
2390
6a0a2f86 2391 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2392
2b6db913
YW		 2393 if (netdev->ifindex > 0)
2394 /* Assume already enslaved. */
a63e5daa 2395 continue;
a63e5daa 2396
7033af49
YW		 2397 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2398 continue;
2399
f2341e0a
LP		 2400 log_struct(LOG_DEBUG,
2401 LOG_LINK_INTERFACE(link),
2402 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2403 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2404
34bf3c00
YW		 2405 link->enslaving++;
2406
f2341e0a 2407 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2408 if (r < 0) {
f2341e0a
LP		 2409 log_struct_errno(LOG_WARNING, r,
2410 LOG_LINK_INTERFACE(link),
2411 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2412 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2413 link_enter_failed(link);
2414 return r;
2415 }
326cb406
SS		 2416 }
2417
34bf3c00
YW		 2418 if (link->enslaving == 0)
2419 return link_joined(link);
2420
ef1ba606
TG		 2421 return 0;
2422}
2423
769d324c 2424static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2425 int r;
2426
765afd5c 2427 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2428 return 0;
2429
765afd5c
LP		 2430 /* We propagate the forwarding flag from one interface to the
2431 * global setting one way. This means: as long as at least one
2432 * interface was configured at any time that had IP forwarding
2433 * enabled the setting will stay on for good. We do this
2434 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2435 * somewhat in sync (see below). */
15dee3f0 2436
62e021a9 2437 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2438 if (r < 0)
765afd5c 2439 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2440
769d324c
LP		 2441 return 0;
2442}
2443
2444static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2445 int r;
2446
765afd5c 2447 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2448 return 0;
2449
61233823 2450 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2451 * packet forwarding setting: either packet forwarding is on
2452 * for all, or off for all. We hence don't bother with a
2453 * per-interface setting, but simply propagate the interface
2454 * flag, if it is set, to the global flag, one-way. Note that
2455 * while IPv4 would allow a per-interface flag, we expose the
2456 * same behaviour there and also propagate the setting from
2457 * one to all, to keep things simple (see above). */
15dee3f0 2458
62e021a9 2459 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2460 if (r < 0)
765afd5c 2461 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2462
2463 return 0;
2464}
2465
49092e22 2466static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2467 IPv6PrivacyExtensions s;
49092e22
SS		 2468 int r;
2469
1f0d9695 2470 s = link_ipv6_privacy_extensions(link);
66a6bd68 2471 if (s < 0)
49092e22
SS		 2472 return 0;
2473
62e021a9 2474 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2475 if (r < 0)
49092e22
SS		 2476 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2477
2478 return 0;
2479}
2480
4f2e437a 2481static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2482 int r;
2483
2484 /* Make this a NOP if IPv6 is not available */
2485 if (!socket_ipv6_is_supported())
2486 return 0;
2487
2488 if (link->flags & IFF_LOOPBACK)
2489 return 0;
2490
d68e2e59
LP		 2491 if (!link->network)
2492 return 0;
2493
62e021a9 2494 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2495 if (r < 0)
fe307276 2496 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2497
2498 return 0;
2499}
2500
8749cbcd 2501static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2502 int r;
2503
2504 /* Make this a NOP if IPv6 is not available */
2505 if (!socket_ipv6_is_supported())
2506 return 0;
2507
2508 if (link->flags & IFF_LOOPBACK)
2509 return 0;
2510
d68e2e59
LP		 2511 if (!link->network)
2512 return 0;
2513
8749cbcd
SS		 2514 if (link->network->ipv6_dad_transmits < 0)
2515 return 0;
2516
62e021a9 2517 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2518 if (r < 0)
8749cbcd 2519 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2520
2521 return 0;
2522}
2523
b69c3180 2524static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2525 int r;
2526
2527 /* Make this a NOP if IPv6 is not available */
2528 if (!socket_ipv6_is_supported())
2529 return 0;
2530
2531 if (link->flags & IFF_LOOPBACK)
2532 return 0;
2533
d68e2e59
LP		 2534 if (!link->network)
2535 return 0;
2536
b69c3180
SS		 2537 if (link->network->ipv6_hop_limit < 0)
2538 return 0;
2539
62e021a9 2540 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2541 if (r < 0)
b69c3180 2542 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2543
2544 return 0;
2545}
2546
11102cba 2547static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2548 int r;
2549
2550 /* Make this a NOP if IPv6 is not available */
2551 if (!socket_ipv6_is_supported())
2552 return 0;
2553
2554 if (link->flags & IFF_LOOPBACK)
2555 return 0;
2556
2557 if (link->network->ipv6_mtu == 0)
2558 return 0;
2559
d236718c
DS		 2560 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
2561 * on the interface. Bump up IPv6 MTU bytes to IPV6_MTU_MIN. */
2562 if (link->network->ipv6_mtu < IPV6_MIN_MTU) {
2563 log_link_notice(link, "Bumping IPv6 MTU to "STRINGIFY(IPV6_MIN_MTU)" byte minimum required");
2564 link->network->ipv6_mtu = IPV6_MIN_MTU;
2565 }
2566
62e021a9 2567 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
d236718c
DS		 2568 if (r < 0) {
2569 if (link->mtu < link->network->ipv6_mtu)
2570 log_link_warning(link, "Cannot set IPv6 MTU %"PRIu32" higher than device MTU %"PRIu32,
2571 link->network->ipv6_mtu, link->mtu);
2572 else
2573 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2574 }
2575
2576 link->ipv6_mtu_set = true;
11102cba
SS		 2577
2578 return 0;
2579}
2580
94d76d07
YW		 2581static int link_set_ipv4_accept_local(Link *link) {
2582 int r;
2583
2584 if (link->flags & IFF_LOOPBACK)
2585 return 0;
2586
2587 if (link->network->ipv4_accept_local < 0)
2588 return 0;
2589
2590 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "accept_local", link->network->ipv4_accept_local);
2591 if (r < 0)
2592 log_link_warning_errno(link, r, "Cannot set IPv4 accept_local flag for interface: %m");
2593
2594 return 0;
2595}
2596
30226d27
TJ		 2597static bool link_is_static_address_configured(Link *link, Address *address) {
2598 Address *net_address;
2599
2600 assert(link);
2601 assert(address);
2602
2603 if (!link->network)
2604 return false;
2605
2606 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2607 if (address_equal(net_address, address))
2608 return true;
2609
2610 return false;
2611}
2612
d1bdafd2
WKI		 2613static bool link_is_neighbor_configured(Link *link, Neighbor *neighbor) {
2614 Neighbor *net_neighbor;
2615
2616 assert(link);
2617 assert(neighbor);
2618
2619 if (!link->network)
2620 return false;
2621
2622 LIST_FOREACH(neighbors, net_neighbor, link->network->neighbors)
2623 if (neighbor_equal(net_neighbor, neighbor))
2624 return true;
2625
2626 return false;
2627}
2628
7ecf0c3e
TJ		 2629static bool link_is_static_route_configured(Link *link, Route *route) {
2630 Route *net_route;
2631
2632 assert(link);
2633 assert(route);
2634
2635 if (!link->network)
2636 return false;
2637
2638 LIST_FOREACH(routes, net_route, link->network->static_routes)
2639 if (route_equal(net_route, route))
2640 return true;
2641
2642 return false;
2643}
2644
db51778f
YW		 2645static bool link_address_is_dynamic(Link *link, Address *address) {
2646 Route *route;
2647 Iterator i;
2648
2649 assert(link);
2650 assert(address);
2651
2652 if (address->cinfo.ifa_prefered != CACHE_INFO_INFINITY_LIFE_TIME)
2653 return true;
2654
2655 /* Even when the address is leased from a DHCP server, networkd assign the address
2656 * without lifetime when KeepConfiguration=dhcp. So, let's check that we have
2657 * corresponding routes with RTPROT_DHCP. */
2658 SET_FOREACH(route, link->routes_foreign, i) {
2659 if (route->protocol != RTPROT_DHCP)
2660 continue;
2661
2662 if (address->family != route->family)
2663 continue;
2664
2665 if (in_addr_equal(address->family, &address->in_addr, &route->prefsrc))
2666 return true;
2667 }
2668
2669 return false;
2670}
2671
0917a271
DS		 2672static int link_enumerate_ipv6_tentative_addresses(Link *link) {
2673 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
2674 sd_netlink_message *addr;
2675 int r;
2676
2677 assert(link);
2678 assert(link->manager);
2679 assert(link->manager->rtnl);
2680
2681 r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_GETADDR, 0, AF_INET6);
2682 if (r < 0)
2683 return r;
2684
2685 r = sd_netlink_call(link->manager->rtnl, req, 0, &reply);
2686 if (r < 0)
2687 return r;
2688
2689 for (addr = reply; addr; addr = sd_netlink_message_next(addr)) {
2690 unsigned char flags;
2691 int ifindex;
2692
2693 r = sd_rtnl_message_addr_get_ifindex(addr, &ifindex);
2694 if (r < 0) {
2695 log_link_warning_errno(link, r, "rtnl: invalid ifindex, ignoring: %m");
2696 continue;
2697 } else if (link->ifindex != ifindex)
2698 continue;
2699
2700 r = sd_rtnl_message_addr_get_flags(addr, &flags);
2701 if (r < 0) {
2702 log_link_warning_errno(link, r, "rtnl: received address message with invalid flags, ignoring: %m");
2703 continue;
2704 } else if (!(flags & IFA_F_TENTATIVE))
2705 continue;
2706
2707 log_link_debug(link, "Found tentative ipv6 link-local address");
2708 (void) manager_rtnl_process_address(link->manager->rtnl, addr, link->manager);
2709 }
2710
2711 return 0;
2712}
2713
5e5b137a
TG		 2714static int link_drop_foreign_config(Link *link) {
2715 Address *address;
d1bdafd2 2716 Neighbor *neighbor;
5e5b137a
TG		 2717 Route *route;
2718 Iterator i;
2719 int r;
2720
0917a271
DS		 2721 /* The kernel doesn't notify us about tentative addresses;
2722 * so if ipv6ll is disabled, we need to enumerate them now so we can drop them below */
2723 if (!link_ipv6ll_enabled(link)) {
2724 r = link_enumerate_ipv6_tentative_addresses(link);
2725 if (r < 0)
2726 return r;
2727 }
2728
5e5b137a 2729 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2730 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2731 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
5e5b137a
TG		 2732 continue;
2733
db51778f 2734 if (link_address_is_dynamic(link, address)) {
b1b0b42e 2735 if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
db51778f 2736 continue;
b1b0b42e 2737 } else if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
db51778f
YW		 2738 continue;
2739
30226d27
TJ		 2740 if (link_is_static_address_configured(link, address)) {
2741 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2742 if (r < 0)
2743 return log_link_error_errno(link, r, "Failed to add address: %m");
2744 } else {
63ae0569 2745 r = address_remove(address, link, NULL);
30226d27
TJ		 2746 if (r < 0)
2747 return r;
2748 }
5e5b137a
TG		 2749 }
2750
d1bdafd2
WKI		 2751 SET_FOREACH(neighbor, link->neighbors_foreign, i) {
2752 if (link_is_neighbor_configured(link, neighbor)) {
2753 r = neighbor_add(link, neighbor->family, &neighbor->in_addr, &neighbor->lladdr, neighbor->lladdr_size, NULL);
2754 if (r < 0)
2755 return r;
2756 } else {
2757 r = neighbor_remove(neighbor, link, NULL);
2758 if (r < 0)
2759 return r;
2760 }
2761 }
2762
5e5b137a 2763 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2764 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2765 if (route->protocol == RTPROT_KERNEL)
2766 continue;
2767
bd7d6cec
YW		 2768 /* do not touch multicast route added by kernel */
2769 /* FIXME: Why the kernel adds this route with protocol RTPROT_BOOT??? We need to investigate that.
2770 * https://tools.ietf.org/html/rfc4862#section-5.4 may explain why. */
2771 if (route->protocol == RTPROT_BOOT &&
2772 route->family == AF_INET6 &&
2773 route->dst_prefixlen == 8 &&
2774 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 }}} }))
2775 continue;
2776
b1b0b42e 2777 if (route->protocol == RTPROT_STATIC && link->network &&
db51778f
YW		 2778 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2779 continue;
2780
b1b0b42e 2781 if (route->protocol == RTPROT_DHCP && link->network &&
db51778f
YW		 2782 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2783 continue;
2784
7ecf0c3e 2785 if (link_is_static_route_configured(link, route)) {
f1368755 2786 r = route_add(link, route, NULL);
7ecf0c3e
TJ		 2787 if (r < 0)
2788 return r;
2789 } else {
4645ad47 2790 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2791 if (r < 0)
2792 return r;
2793 }
5e5b137a
TG		 2794 }
2795
2796 return 0;
2797}
2798
3104883d 2799static int link_drop_config(Link *link) {
410a7f15 2800 Address *address, *pool_address;
d1bdafd2 2801 Neighbor *neighbor;
3104883d
SS		 2802 Route *route;
2803 Iterator i;
2804 int r;
2805
2806 SET_FOREACH(address, link->addresses, i) {
2807 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2808 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
3104883d
SS		 2809 continue;
2810
63ae0569 2811 r = address_remove(address, link, NULL);
3104883d
SS		 2812 if (r < 0)
2813 return r;
410a7f15
RM		 2814
2815 /* If this address came from an address pool, clean up the pool */
2816 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2817 if (address_equal(address, pool_address)) {
2818 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2819 address_free(pool_address);
2820 break;
2821 }
2822 }
3104883d
SS		 2823 }
2824
d1bdafd2
WKI		 2825 SET_FOREACH(neighbor, link->neighbors, i) {
2826 r = neighbor_remove(neighbor, link, NULL);
2827 if (r < 0)
2828 return r;
2829 }
2830
3104883d
SS		 2831 SET_FOREACH(route, link->routes, i) {
2832 /* do not touch routes managed by the kernel */
2833 if (route->protocol == RTPROT_KERNEL)
2834 continue;
2835
4645ad47 2836 r = route_remove(route, link, NULL);
3104883d
SS		 2837 if (r < 0)
2838 return r;
2839 }
2840
c69305ff
LP		 2841 ndisc_flush(link);
2842
3104883d
SS		 2843 return 0;
2844}
2845
051e77ca
SS		 2846static int link_configure_ipv4_dad(Link *link) {
2847 Address *address;
2848 int r;
2849
2850 assert(link);
2851 assert(link->network);
2852
2853 LIST_FOREACH(addresses, address, link->network->static_addresses)
2854 if (address->family == AF_INET &&
2855 FLAGS_SET(address->duplicate_address_detection, ADDRESS_FAMILY_IPV4)) {
2856 r = configure_ipv4_duplicate_address_detection(link, address);
2857 if (r < 0)
2858 return log_link_error_errno(link, r, "Failed to configure IPv4ACD: %m");
2859 }
2860
2861 return 0;
2862}
2863
34658df2
YW		 2864static int link_configure_traffic_control(Link *link) {
2865 TrafficControl *tc;
0f5bd7fe 2866 Iterator i;
02b59d57
TG		 2867 int r;
2868
34658df2
YW		 2869 link->tc_configured = false;
2870 link->tc_messages = 0;
4ecdcb07 2871
34658df2
YW		 2872 ORDERED_HASHMAP_FOREACH(tc, link->network->tc_by_section, i) {
2873 r = traffic_control_configure(link, tc);
4ecdcb07
YW		 2874 if (r < 0)
2875 return r;
2876 }
2877
34658df2
YW		 2878 if (link->tc_messages == 0)
2879 link->tc_configured = true;
4ecdcb07 2880 else
34658df2 2881 log_link_debug(link, "Configuring traffic control");
4ecdcb07
YW		 2882
2883 return 0;
2884}
2885
518cd6b5
SS		 2886static int link_configure_sr_iov(Link *link) {
2887 SRIOV *sr_iov;
2888 Iterator i;
2889 int r;
2890
2891 link->sr_iov_configured = false;
2892 link->sr_iov_messages = 0;
2893
2894 ORDERED_HASHMAP_FOREACH(sr_iov, link->network->sr_iov_by_section, i) {
2895 r = sr_iov_configure(link, sr_iov);
2896 if (r < 0)
2897 return r;
2898 }
2899
2900 if (link->sr_iov_messages == 0)
2901 link->sr_iov_configured = true;
2902 else
2903 log_link_debug(link, "Configuring SR-IOV");
2904
2905 return 0;
2906}
2907
4ecdcb07
YW		 2908static int link_configure(Link *link) {
2909 int r;
2910
ef1ba606 2911 assert(link);
b22d8a00 2912 assert(link->network);
bd08ce56 2913 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2914
34658df2 2915 r = link_configure_traffic_control(link);
4ecdcb07
YW		 2916 if (r < 0)
2917 return r;
2918
518cd6b5
SS		 2919 r = link_configure_sr_iov(link);
2920 if (r < 0)
2921 return r;
2922
500b96eb 2923 if (link->iftype == ARPHRD_CAN)
93ea7750 2924 return link_configure_can(link);
92c918b0 2925
482efedc
SS		 2926 /* If IPv6 configured that is static IPv6 address and IPv6LL autoconfiguration is enabled
2927 * for this interface, then enable IPv6 */
57ad7607 2928 (void) link_update_ipv6_sysctl(link);
482efedc 2929
23d8b221
SS		 2930 r = link_set_proxy_arp(link);
2931 if (r < 0)
2932 return r;
2933
a0e5c15d
FK		 2934 r = ipv6_proxy_ndp_addresses_configure(link);
2935 if (r < 0)
2936 return r;
2937
769d324c
LP		 2938 r = link_set_ipv4_forward(link);
2939 if (r < 0)
2940 return r;
2941
2942 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2943 if (r < 0)
2944 return r;
2945
49092e22
SS		 2946 r = link_set_ipv6_privacy_extensions(link);
2947 if (r < 0)
2948 return r;
2949
4f2e437a
SS		 2950 r = link_set_ipv6_accept_ra(link);
2951 if (r < 0)
2952 return r;
2953
8749cbcd
SS		 2954 r = link_set_ipv6_dad_transmits(link);
2955 if (r < 0)
2956 return r;
b69c3180
SS		 2957
2958 r = link_set_ipv6_hop_limit(link);
2959 if (r < 0)
2960 return r;
8749cbcd 2961
94d76d07
YW		 2962 r = link_set_ipv4_accept_local(link);
2963 if (r < 0)
2964 return r;
2965
99d2baa2
SS		 2966 r = link_set_flags(link);
2967 if (r < 0)
2968 return r;
2969
89fe6535
SS		 2970 r = link_set_group(link);
2971 if (r < 0)
2972 return r;
2973
910feb78 2974 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
b22d8a00 2975 r = ipv4ll_configure(link);
eb34d4af
TG		 2976 if (r < 0)
2977 return r;
2978 }
2979
78c958f8 2980 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2981 r = dhcp4_set_promote_secondaries(link);
2982 if (r < 0)
2983 return r;
2984
3c9b8860 2985 r = dhcp4_configure(link);
eb34d4af
TG		 2986 if (r < 0)
2987 return r;
eb34d4af
TG		 2988 }
2989
78c958f8 2990 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2991 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2992 if (r < 0)
2993 return r;
2994
2995 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2996 if (r < 0)
2997 return r;
dd43110f
TG		 2998 }
2999
62379e88
TG		 3000 if (link_dhcp6_enabled(link) ||
3001 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 3002 r = dhcp6_configure(link);
3003 if (r < 0)
3004 return r;
3005 }
3006
3007 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 3008 r = ndisc_configure(link);
4138fb2c
PF		 3009 if (r < 0)
3010 return r;
3011 }
3012
7465dd22
PF		 3013 if (link_radv_enabled(link)) {
3014 r = radv_configure(link);
3015 if (r < 0)
3016 return r;
3017 }
3018
8e1ad1ea 3019 if (link_lldp_rx_enabled(link)) {
7f853950 3020 r = link_lldp_rx_configure(link);
273eec24
LP		 3021 if (r < 0)
3022 return r;
ce43e484
SS		 3023 }
3024
f6fcc1c2 3025 r = link_configure_mtu(link);
40288ece
YW		 3026 if (r < 0)
3027 return r;
44b598a1 3028
9f6e82e6
YW		 3029 r = link_configure_addrgen_mode(link);
3030 if (r < 0)
3031 return r;
0e2fdb83 3032
051e77ca
SS		 3033 r = link_configure_ipv4_dad(link);
3034 if (r < 0)
3035 return r;
3036
3a390124
DS		 3037 return link_configure_continue(link);
3038}
3039
3040/* The configuration continues in this separate function, instead of
3041 * including this in the above link_configure() function, for two
3042 * reasons:
3043 * 1) some devices reset the link when the mtu is set, which caused
3044 * an infinite loop here in networkd; see:
3045 * https://github.com/systemd/systemd/issues/6593
3046 * https://github.com/systemd/systemd/issues/9831
3047 * 2) if ipv6ll is disabled, then bringing the interface up must be
3048 * delayed until after we get confirmation from the kernel that
3049 * the addr_gen_mode parameter has been set (via netlink), see:
3050 * https://github.com/systemd/systemd/issues/13882
3051 */
3052static int link_configure_continue(Link *link) {
55dc8c4a
YW		 3053 int r;
3054
3055 assert(link);
3056 assert(link->network);
bd08ce56 3057 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a 3058
9524014e 3059 if (link->setting_mtu || link->setting_genmode)
55dc8c4a
YW		 3060 return 0;
3061
4c649652
DS		 3062 /* Drop foreign config, but ignore loopback or critical devices.
3063 * We do not want to remove loopback address or addresses used for root NFS. */
3064 if (!(link->flags & IFF_LOOPBACK) &&
3065 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
3066 r = link_drop_foreign_config(link);
3067 if (r < 0)
3068 return r;
3069 }
3070
d236718c
DS		 3071 /* The kernel resets ipv6 mtu after changing device mtu;
3072 * we must set this here, after we've set device mtu */
3073 r = link_set_ipv6_mtu(link);
3074 if (r < 0)
3075 return r;
3076
dad2d78e 3077 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 3078 r = link_acquire_conf(link);
3079 if (r < 0)
3080 return r;
cc544d5f 3081 }
1e9be60b 3082
3f265037 3083 return link_enter_join_netdev(link);
505f8da7
TG		 3084}
3085
27dfc982
YW		 3086static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
3087 assert(duid);
3088
3089 if (duid->raw_data_len > 0)
3090 return 0;
3091
3092 if (duid->type != DUID_TYPE_UUID)
3093 return -EINVAL;
3094
3095 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
3096 duid->raw_data_len = sizeof(sd_id128_t);
3097
3098 return 1;
3099}
3100
3101int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
3102 Manager *manager = userdata;
3103 const sd_bus_error *e;
3104 const void *a;
3105 size_t sz;
3106 DUID *duid;
3107 Link *link;
3108 int r;
3109
3110 assert(m);
3111 assert(manager);
3112
3113 e = sd_bus_message_get_error(m);
3114 if (e) {
3115 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 3116 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 3117 e->message);
3118 goto configure;
3119 }
3120
3121 r = sd_bus_message_read_array(m, 'y', &a, &sz);
3122 if (r < 0)
3123 goto configure;
3124
3125 if (sz != sizeof(sd_id128_t)) {
ab4dd984 3126 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 3127 goto configure;
3128 }
3129
3130 memcpy(&manager->product_uuid, a, sz);
3131 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
3132 (void) duid_set_uuid(duid, manager->product_uuid);
3133
3134 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
3135
3136configure:
3137 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3dc2e7af
YW		 3138 link_unref(link);
3139
27dfc982
YW		 3140 r = link_configure(link);
3141 if (r < 0)
4ff296b0 3142 link_enter_failed(link);
27dfc982
YW		 3143 }
3144
3145 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
3146
3147 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
3148 * even if the method fails. */
3149 manager->has_product_uuid = true;
3150
3151 return 1;
3152}
3153
3154static bool link_requires_uuid(Link *link) {
3155 const DUID *duid;
3156
3157 assert(link);
3158 assert(link->manager);
3159 assert(link->network);
3160
3161 duid = link_get_duid(link);
3162 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
3163 return false;
3164
3165 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
3166 return true;
3167
3168 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
3169 return true;
3170
3171 return false;
3172}
3173
3174static int link_configure_duid(Link *link) {
3175 Manager *m;
3176 DUID *duid;
3177 int r;
3178
3179 assert(link);
3180 assert(link->manager);
3181 assert(link->network);
3182
3183 m = link->manager;
3184 duid = link_get_duid(link);
3185
3186 if (!link_requires_uuid(link))
3187 return 1;
3188
3189 if (m->has_product_uuid) {
3190 (void) duid_set_uuid(duid, m->product_uuid);
3191 return 1;
3192 }
3193
3194 if (!m->links_requesting_uuid) {
3195 r = manager_request_product_uuid(m, link);
3196 if (r < 0) {
3197 if (r == -ENOMEM)
3198 return r;
3199
ab4dd984
ZJS		 3200 log_link_warning_errno(link, r,
3201 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 3202 return 1;
3203 }
3204 } else {
3205 r = set_put(m->links_requesting_uuid, link);
3206 if (r < 0)
3207 return log_oom();
39dbd0c7
ZJS		 3208 if (r > 0)
3209 link_ref(link);
27dfc982
YW		 3210
3211 r = set_put(m->duids_requesting_uuid, duid);
3212 if (r < 0)
3213 return log_oom();
3214 }
3215
3216 return 0;
3217}
3218
572b21d9 3219static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
ad932b15
YW		 3220 Network *network;
3221 int r;
3222
572b21d9
YW		 3223 if (m) {
3224 _cleanup_strv_free_ char **s = NULL;
3225
3226 r = sd_netlink_message_get_errno(m);
3227 if (r < 0)
3228 return r;
3229
3230 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3231 if (r < 0 && r != -ENODATA)
3232 return r;
3233
3234 strv_free_and_replace(link->alternative_names, s);
3235 }
3236
c643bda5
YW		 3237 r = network_get(link->manager, link->iftype, link->sd_device,
3238 link->ifname, link->alternative_names, link->driver,
3239 &link->mac, &link->permanent_mac,
3240 link->wlan_iftype, link->ssid, &link->bssid, &network);
ad932b15
YW		 3241 if (r == -ENOENT) {
3242 link_enter_unmanaged(link);
3243 return 0;
3244 } else if (r == 0 && network->unmanaged) {
3245 link_enter_unmanaged(link);
3246 return 0;
3247 } else if (r < 0)
3248 return r;
3249
99b8517c 3250 if (link->network == network && !force)
ad932b15
YW		 3251 return 0;
3252
3253 log_link_info(link, "Re-configuring with %s", network->filename);
3254
3255 /* Dropping old .network file */
3256 r = link_stop_clients(link, false);
572b21d9 3257 if (r < 0)
ad932b15 3258 return r;
ad932b15
YW		 3259
3260 if (link_dhcp4_server_enabled(link))
3261 (void) sd_dhcp_server_stop(link->dhcp_server);
3262
3263 r = link_drop_config(link);
3264 if (r < 0)
3265 return r;
3266
2c7b826d 3267 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
ad932b15
YW		 3268 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
3269 r = link_drop_foreign_config(link);
3270 if (r < 0)
3271 return r;
3272 }
3273
3274 link_free_carrier_maps(link);
3275 link_free_engines(link);
3276 link->network = network_unref(link->network);
3277
3278 /* Then, apply new .network file */
3279 r = network_apply(network, link);
3280 if (r < 0)
3281 return r;
3282
3283 r = link_new_carrier_maps(link);
3284 if (r < 0)
3285 return r;
3286
3287 link_set_state(link, LINK_STATE_INITIALIZED);
8ae7b8a1 3288 link_dirty(link);
ad932b15
YW		 3289
3290 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3291 * link_configure() is called later asynchronously. */
3292 r = link_configure_duid(link);
3293 if (r <= 0)
3294 return r;
3295
3296 r = link_configure(link);
3297 if (r < 0)
3298 return r;
3299
3300 return 0;
3301}
3302
572b21d9
YW		 3303static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3304 int r;
3305
3306 r = link_reconfigure_internal(link, m, false);
3307 if (r < 0)
3308 link_enter_failed(link);
3309
3310 return 1;
3311}
3312
3313static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3314 int r;
3315
3316 r = link_reconfigure_internal(link, m, true);
3317 if (r < 0)
3318 link_enter_failed(link);
3319
3320 return 1;
3321}
3322
3323int link_reconfigure(Link *link, bool force) {
3324 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
3325 int r;
3326
2c0d7ed3
YW		 3327 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
3328 return 0;
3329
572b21d9
YW		 3330 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3331 link->ifindex);
3332 if (r < 0)
3333 return r;
3334
3335 r = netlink_call_async(link->manager->rtnl, NULL, req,
3336 force ? link_force_reconfigure_handler : link_reconfigure_handler,
3337 link_netlink_destroy_callback, link);
3338 if (r < 0)
3339 return r;
3340
3341 link_ref(link);
3342
3343 return 0;
3344}
3345
e6bf7774 3346static int link_initialized_and_synced(Link *link) {
505f8da7 3347 Network *network;
505f8da7
TG		 3348 int r;
3349
3350 assert(link);
3351 assert(link->ifname);
3352 assert(link->manager);
3353
bd08ce56
YW		 3354 /* We may get called either from the asynchronous netlink callback,
3355 * or directly for link_add() if running in a container. See link_add(). */
3356 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 3357 return 0;
505f8da7 3358
6a7a4e4d 3359 log_link_debug(link, "Link state is up-to-date");
bd08ce56 3360 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 3361
0d4ad91d
AR		 3362 r = link_new_bound_by_list(link);
3363 if (r < 0)
3364 return r;
3365
3366 r = link_handle_bound_by_list(link);
3367 if (r < 0)
3368 return r;
3369
c4a03a56 3370 if (!link->network) {
0894cfe4 3371 r = wifi_get_info(link);
8d968fdd
YW		 3372 if (r < 0)
3373 return r;
3374
c643bda5
YW		 3375 r = network_get(link->manager, link->iftype, link->sd_device,
3376 link->ifname, link->alternative_names, link->driver,
3377 &link->mac, &link->permanent_mac,
3378 link->wlan_iftype, link->ssid, &link->bssid, &network);
c4a03a56
TG		 3379 if (r == -ENOENT) {
3380 link_enter_unmanaged(link);
4232cf04 3381 return 0;
a09dc546
DM		 3382 } else if (r == 0 && network->unmanaged) {
3383 link_enter_unmanaged(link);
3384 return 0;
c4a03a56
TG		 3385 } else if (r < 0)
3386 return r;
505f8da7 3387
c4a03a56
TG		 3388 if (link->flags & IFF_LOOPBACK) {
3389 if (network->link_local != ADDRESS_FAMILY_NO)
3390 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3391
c4a03a56
TG		 3392 if (network->dhcp != ADDRESS_FAMILY_NO)
3393 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3394
c4a03a56
TG		 3395 if (network->dhcp_server)
3396 log_link_debug(link, "Ignoring DHCP server for loopback link");
3397 }
bd2efe92 3398
7d342c03 3399 r = network_apply(network, link);
c4a03a56
TG		 3400 if (r < 0)
3401 return r;
3402 }
505f8da7 3403
0d4ad91d
AR		 3404 r = link_new_bound_to_list(link);
3405 if (r < 0)
3406 return r;
3407
27dfc982
YW		 3408 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3409 * link_configure() is called later asynchronously. */
3410 r = link_configure_duid(link);
3411 if (r <= 0)
3412 return r;
3413
a748b692
TG		 3414 r = link_configure(link);
3415 if (r < 0)
3416 return r;
3417
4232cf04 3418 return 0;
505f8da7
TG		 3419}
3420
302a796f 3421static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
572b21d9 3422 _cleanup_strv_free_ char **s = NULL;
4ff296b0
YW		 3423 int r;
3424
572b21d9
YW		 3425 r = sd_netlink_message_get_errno(m);
3426 if (r < 0) {
40681e5c 3427 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 3428 link_enter_failed(link);
3429 return 0;
3430 }
3431
3432 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3433 if (r < 0 && r != -ENODATA) {
3434 link_enter_failed(link);
3435 return 0;
3436 }
3437
3438 strv_free_and_replace(link->alternative_names, s);
3439
4ff296b0
YW		 3440 r = link_initialized_and_synced(link);
3441 if (r < 0)
3442 link_enter_failed(link);
e6bf7774
YW		 3443 return 1;
3444}
3445
51517f9e 3446int link_initialized(Link *link, sd_device *device) {
4afd3348 3447 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3448 int r;
3449
3450 assert(link);
3451 assert(link->manager);
3452 assert(link->manager->rtnl);
3453 assert(device);
3454
8434fd5c 3455 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3456 return 0;
3457
51517f9e 3458 if (link->sd_device)
679b3605
TG		 3459 return 0;
3460
79008bdd 3461 log_link_debug(link, "udev initialized link");
bd08ce56 3462 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 3463
51517f9e 3464 link->sd_device = sd_device_ref(device);
4f561e8e 3465
3c9b8860
TG		 3466 /* udev has initialized the link, but we don't know if we have yet
3467 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3468 * when it returns we know that the pending NEWLINKs have already been
3469 * processed and that we are up-to-date */
4f561e8e 3470
3c9b8860
TG		 3471 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3472 link->ifindex);
4f561e8e
TG		 3473 if (r < 0)
3474 return r;
3475
302a796f
YW		 3476 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3477 link_netlink_destroy_callback, link);
4f561e8e
TG		 3478 if (r < 0)
3479 return r;
3480
5da8149f
TG		 3481 link_ref(link);
3482
4f561e8e
TG		 3483 return 0;
3484}
3485
c4a03a56 3486static int link_load(Link *link) {
0bc70f1d
TG		 3487 _cleanup_free_ char *network_file = NULL,
3488 *addresses = NULL,
f703cc2c 3489 *routes = NULL,
0bc70f1d
TG		 3490 *dhcp4_address = NULL,
3491 *ipv4ll_address = NULL;
3492 union in_addr_union address;
c4a03a56
TG		 3493 int r;
3494
3495 assert(link);
3496
aa8fbc74 3497 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3498 "NETWORK_FILE", &network_file,
3499 "ADDRESSES", &addresses,
f703cc2c 3500 "ROUTES", &routes,
0bc70f1d 3501 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3502 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3503 if (r < 0 && r != -ENOENT)
3504 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3505
3506 if (network_file) {
3507 Network *network;
3508 char *suffix;
3509
3510 /* drop suffix */
3511 suffix = strrchr(network_file, '.');
3512 if (!suffix) {
3513 log_link_debug(link, "Failed to get network name from %s", network_file);
3514 goto network_file_fail;
3515 }
3516 *suffix = '\0';
3517
3518 r = network_get_by_name(link->manager, basename(network_file), &network);
3519 if (r < 0) {
3520 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3521 goto network_file_fail;
3522 }
3523
7d342c03 3524 r = network_apply(network, link);
c4a03a56
TG		 3525 if (r < 0)
3526 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3527 }
3528
3529network_file_fail:
3530
1f68f772
ZJS		 3531 for (const char *p = addresses; p; ) {
3532 _cleanup_free_ char *address_str = NULL;
3533 char *prefixlen_str;
3534 int family;
3535 unsigned char prefixlen;
c4a03a56 3536
1f68f772
ZJS		 3537 r = extract_first_word(&p, &address_str, NULL, 0);
3538 if (r < 0)
3539 log_link_warning_errno(link, r, "failed to parse ADDRESSES: %m");
3540 if (r <= 0)
3541 break;
c4a03a56 3542
1f68f772
ZJS		 3543 prefixlen_str = strchr(address_str, '/');
3544 if (!prefixlen_str) {
3545 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
3546 continue;
3547 }
3548 *prefixlen_str++ = '\0';
c4a03a56 3549
1f68f772
ZJS		 3550 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3551 if (r != 1) {
3552 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3553 continue;
3554 }
c4a03a56 3555
1f68f772
ZJS		 3556 r = in_addr_from_string_auto(address_str, &family, &address);
3557 if (r < 0) {
3558 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
3559 continue;
c4a03a56 3560 }
c4a03a56 3561
1f68f772
ZJS		 3562 r = address_add(link, family, &address, prefixlen, NULL);
3563 if (r < 0)
3564 return log_link_error_errno(link, r, "Failed to add address: %m");
3565 }
74544b4e 3566
1f68f772
ZJS		 3567 for (const char *p = routes; p; ) {
3568 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
3569 _cleanup_(route_freep) Route *tmp = NULL;
3570 _cleanup_free_ char *route_str = NULL;
3571 char *prefixlen_str;
3572 Route *route;
f703cc2c 3573
1f68f772
ZJS		 3574 r = extract_first_word(&p, &route_str, NULL, 0);
3575 if (r < 0)
3576 log_link_debug_errno(link, r, "failed to parse ROUTES: %m");
3577 if (r <= 0)
3578 break;
c598ac76 3579
1f68f772
ZJS		 3580 prefixlen_str = strchr(route_str, '/');
3581 if (!prefixlen_str) {
3582 log_link_debug(link, "Failed to parse route %s", route_str);
3583 continue;
3584 }
3585 *prefixlen_str++ = '\0';
f703cc2c 3586
1f68f772
ZJS		 3587 r = route_new(&tmp);
3588 if (r < 0)
3589 return log_oom();
f703cc2c 3590
1f68f772
ZJS		 3591 r = sscanf(prefixlen_str,
3592 "%hhu/%hhu/%"SCNu32"/%"PRIu32"/"USEC_FMT,
3593 &tmp->dst_prefixlen,
3594 &tmp->tos,
3595 &tmp->priority,
3596 &tmp->table,
3597 &tmp->lifetime);
3598 if (r != 5) {
3599 log_link_debug(link,
3600 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3601 prefixlen_str);
3602 continue;
3603 }
f1368755 3604
1f68f772
ZJS		 3605 r = in_addr_from_string_auto(route_str, &tmp->family, &tmp->dst);
3606 if (r < 0) {
3607 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
3608 continue;
3609 }
f703cc2c 3610
1f68f772
ZJS		 3611 r = route_add(link, tmp, &route);
3612 if (r < 0)
3613 return log_link_error_errno(link, r, "Failed to add route: %m");
f703cc2c 3614
1f68f772
ZJS		 3615 if (route->lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
3616 r = sd_event_add_time(link->manager->event, &expire,
3617 clock_boottime_or_monotonic(),
3618 route->lifetime, 0, route_expire_handler, route);
f703cc2c 3619 if (r < 0)
1f68f772 3620 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
f703cc2c 3621 }
1f68f772
ZJS		 3622
3623 sd_event_source_unref(route->expire);
3624 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3625 }
3626
0bc70f1d
TG		 3627 if (dhcp4_address) {
3628 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3629 if (r < 0) {
b68d26b8 3630 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3631 goto dhcp4_address_fail;
3632 }
3633
b1c626f6 3634 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3635 if (r < 0)
b68d26b8 3636 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d 3637
1b43e246
DS		 3638 r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0);
3639 if (r < 0)
3640 return log_link_error_errno(link, r, "Failed to attach DHCPv4 event: %m");
3641
0bc70f1d
TG		 3642 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3643 if (r < 0)
b68d26b8 3644 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3645 }
3646
3647dhcp4_address_fail:
3648
3649 if (ipv4ll_address) {
3650 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3651 if (r < 0) {
b68d26b8 3652 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3653 goto ipv4ll_address_fail;
3654 }
3655
3656 r = sd_ipv4ll_new(&link->ipv4ll);
3657 if (r < 0)
b68d26b8 3658 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d 3659
1b43e246
DS		 3660 r = sd_ipv4ll_attach_event(link->ipv4ll, NULL, 0);
3661 if (r < 0)
3662 return log_link_error_errno(link, r, "Failed to attach IPv4LL event: %m");
3663
0bc70f1d
TG		 3664 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3665 if (r < 0)
b68d26b8 3666 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3667 }
3668
3669ipv4ll_address_fail:
3670
c4a03a56
TG		 3671 return 0;
3672}
3673
1c4baffc 3674int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3675 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3676 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3677 Link *link;
5a937ea2 3678 int r;
505f8da7
TG		 3679
3680 assert(m);
fbbeb65a 3681 assert(m->rtnl);
505f8da7
TG		 3682 assert(message);
3683 assert(ret);
3684
3685 r = link_new(m, message, ret);
3686 if (r < 0)
3687 return r;
3688
3689 link = *ret;
3690
6a7a4e4d 3691 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3692
c4a03a56
TG		 3693 r = link_load(link);
3694 if (r < 0)
3695 return r;
3696
bf331d87
YW		 3697 if (path_is_read_only_fs("/sys") <= 0) {
3698 /* udev should be around */
ae06ab10 3699 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3700 r = sd_device_new_from_device_id(&device, ifindex_str);
3701 if (r < 0) {
4d59e14f
YW		 3702 log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m");
3703 return 0;
5c416fc4 3704 }
505f8da7 3705
5a937ea2 3706 r = sd_device_get_is_initialized(device);
51517f9e 3707 if (r < 0) {
bf331d87 3708 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 3709 goto failed;
3710 }
5a937ea2 3711 if (r == 0) {
505f8da7 3712 /* not yet ready */
79008bdd 3713 log_link_debug(link, "link pending udev initialization...");
505f8da7 3714 return 0;
3c4cb064 3715 }
505f8da7 3716
299ad32d
YW		 3717 r = device_is_renaming(device);
3718 if (r < 0) {
bf331d87 3719 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 3720 goto failed;
3721 }
3722 if (r > 0) {
bf331d87 3723 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 3724 return 0;
3725 }
3726
4f561e8e
TG		 3727 r = link_initialized(link, device);
3728 if (r < 0)
5c416fc4 3729 goto failed;
4f561e8e 3730 } else {
e6bf7774 3731 r = link_initialized_and_synced(link);
4f561e8e 3732 if (r < 0)
5c416fc4 3733 goto failed;
4f561e8e 3734 }
505f8da7 3735
a748b692 3736 return 0;
5c416fc4
TG		 3737failed:
3738 link_enter_failed(link);
3739 return r;
a748b692
TG		 3740}
3741
c601ebf7 3742int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3743 int r;
3744
3745 assert(link);
3746
3747 log_link_info(link, "Gained IPv6LL");
3748
c601ebf7 3749 link->ipv6ll_address = *address;
e7ab854c
TG		 3750 link_check_ready(link);
3751
b9ea3d2e 3752 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3753 r = link_acquire_ipv6_conf(link);
3754 if (r < 0) {
3755 link_enter_failed(link);
3756 return r;
3757 }
3758 }
3759
3760 return 0;
3761}
3762
9c0a72f9
TG		 3763static int link_carrier_gained(Link *link) {
3764 int r;
3765
3766 assert(link);
3767
0894cfe4 3768 r = wifi_get_info(link);
8d968fdd
YW		 3769 if (r < 0)
3770 return r;
3771 if (r > 0) {
572b21d9
YW		 3772 r = link_reconfigure_internal(link, NULL, false);
3773 if (r < 0) {
3774 link_enter_failed(link);
8d968fdd 3775 return r;
572b21d9 3776 }
8d968fdd
YW		 3777 }
3778
b9ea3d2e 3779 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3780 r = link_acquire_conf(link);
3781 if (r < 0) {
3782 link_enter_failed(link);
3783 return r;
3784 }
6fc25497 3785
b425c3ae 3786 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 3787 r = link_request_set_addresses(link);
6fc25497
SS		 3788 if (r < 0)
3789 return r;
9c0a72f9
TG		 3790 }
3791
0d4ad91d
AR		 3792 r = link_handle_bound_by_list(link);
3793 if (r < 0)
3794 return r;
3795
9c0a72f9
TG		 3796 return 0;
3797}
3798
3799static int link_carrier_lost(Link *link) {
3800 int r;
3801
3802 assert(link);
3803
25e992ba 3804 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3805 return 0;
3806
fbdb6605 3807 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3808 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3809 * configuration and stop the clients as well. */
97e7fb39
SS		 3810 if (link->setting_mtu)
3811 return 0;
3812
95355a28 3813 r = link_stop_clients(link, false);
9c0a72f9
TG		 3814 if (r < 0) {
3815 link_enter_failed(link);
3816 return r;
3817 }
3818
28464ae0
SS		 3819 if (link_dhcp4_server_enabled(link))
3820 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3821
3104883d
SS		 3822 r = link_drop_config(link);
3823 if (r < 0)
3824 return r;
3825
2c7b826d 3826 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
f258e948 3827 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3828 r = link_drop_foreign_config(link);
3829 if (r < 0)
3830 return r;
3831 }
3104883d 3832
0d4ad91d
AR		 3833 r = link_handle_bound_by_list(link);
3834 if (r < 0)
3835 return r;
3836
9c0a72f9
TG		 3837 return 0;
3838}
3839
3840int link_carrier_reset(Link *link) {
3841 int r;
3842
3843 assert(link);
3844
3845 if (link_has_carrier(link)) {
3846 r = link_carrier_lost(link);
3847 if (r < 0)
3848 return r;
3849
3850 r = link_carrier_gained(link);
3851 if (r < 0)
3852 return r;
3853
6a7a4e4d 3854 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3855 }
3856
3857 return 0;
3858}
3859
d236718c
DS		 3860/* This is called every time an interface admin state changes to up;
3861 * specifically, when IFF_UP flag changes from unset to set */
3862static int link_admin_state_up(Link *link) {
3863 int r;
3864
3865 /* We set the ipv6 mtu after the device mtu, but the kernel resets
3866 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
3867 * ipv6_mtu_set prevents this from trying to set it too early before
3868 * the link->network has been setup; we only need to reset it
3869 * here if we've already set it during normal initialization. */
3870 if (link->ipv6_mtu_set) {
3871 r = link_set_ipv6_mtu(link);
3872 if (r < 0)
3873 return r;
3874 }
3875
3876 return 0;
3877}
3878
1c4baffc 3879int link_update(Link *link, sd_netlink_message *m) {
572b21d9 3880 _cleanup_strv_free_ char **s = NULL;
c49b33ac 3881 struct ether_addr mac;
ca4e095a 3882 const char *ifname;
afe7fd56 3883 uint32_t mtu;
d236718c 3884 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 3885 int old_master, r;
22936833 3886
dd3efc09 3887 assert(link);
b8941f74 3888 assert(link->ifname);
22936833
TG		 3889 assert(m);
3890
7619683b 3891 if (link->state == LINK_STATE_LINGER) {
5238e957 3892 log_link_info(link, "Link re-added");
289e6774 3893 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3894
3895 r = link_new_carrier_maps(link);
3896 if (r < 0)
3897 return r;
7619683b
TG		 3898 }
3899
1c4baffc 3900 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3901 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3902 Manager *manager = link->manager;
b8941f74 3903
30de2b89 3904 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3905
30de2b89
YW		 3906 link_drop(link);
3907 r = link_add(manager, m, &link);
3908 if (r < 0)
3909 return r;
b8941f74
TG		 3910 }
3911
572b21d9
YW		 3912 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3913 if (r >= 0)
3914 strv_free_and_replace(link->alternative_names, s);
3915
1c4baffc 3916 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3917 if (r >= 0 && mtu > 0) {
3918 link->mtu = mtu;
4e964aa0 3919 if (link->original_mtu == 0) {
afe7fd56 3920 link->original_mtu = mtu;
6a7a4e4d 3921 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3922 }
3923
3924 if (link->dhcp_client) {
3c9b8860
TG		 3925 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3926 link->mtu);
fc95c359
YW		 3927 if (r < 0)
3928 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3929 }
7465dd22
PF		 3930
3931 if (link->radv) {
3932 r = sd_radv_set_mtu(link->radv, link->mtu);
3933 if (r < 0)
3934 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3935 }
9842de0d 3936 }
69629de9 3937
e9189a1f
TG		 3938 /* The kernel may broadcast NEWLINK messages without the MAC address
3939 set, simply ignore them. */
1c4baffc 3940 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3941 if (r >= 0) {
3c9b8860
TG		 3942 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3943 ETH_ALEN)) {
c49b33ac 3944
3c9b8860
TG		 3945 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3946 ETH_ALEN);
c49b33ac 3947
79008bdd 3948 log_link_debug(link, "MAC address: "
20861203
TG		 3949 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3950 mac.ether_addr_octet[0],
3951 mac.ether_addr_octet[1],
3952 mac.ether_addr_octet[2],
3953 mac.ether_addr_octet[3],
3954 mac.ether_addr_octet[4],
3955 mac.ether_addr_octet[5]);
c49b33ac 3956
20861203
TG		 3957 if (link->ipv4ll) {
3958 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3959 if (r < 0)
3960 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3961 }
c49b33ac 3962
20861203 3963 if (link->dhcp_client) {
3c9b8860 3964 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3965 (const uint8_t *) &link->mac,
3966 sizeof (link->mac),
3967 ARPHRD_ETHER);
6a7a4e4d
LP		 3968 if (r < 0)
3969 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3970
fff1f40c
YW		 3971 r = dhcp4_set_client_identifier(link);
3972 if (r < 0)
3973 return r;
c49b33ac 3974 }
4138fb2c
PF		 3975
3976 if (link->dhcp6_client) {
f24648a6 3977 const DUID* duid = link_get_duid(link);
8341a5c3 3978
4138fb2c 3979 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3980 (const uint8_t *) &link->mac,
3981 sizeof (link->mac),
3982 ARPHRD_ETHER);
6a7a4e4d
LP		 3983 if (r < 0)
3984 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3985
8217ed5e
TH		 3986 if (link->network->iaid_set) {
3987 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3988 link->network->iaid);
3989 if (r < 0)
3990 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3991 }
413708d1 3992
8341a5c3
ZJS		 3993 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3994 duid->type,
3995 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3996 duid->raw_data_len);
413708d1
VK		 3997 if (r < 0)
3998 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3999 }
7465dd22
PF		 4000
4001 if (link->radv) {
4002 r = sd_radv_set_mac(link->radv, &link->mac);
4003 if (r < 0)
4004 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
4005 }
420d2058
SS		 4006
4007 if (link->ndisc) {
4008 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
4009 if (r < 0)
4010 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
4011 }
c49b33ac 4012 }
4f882b2a
TG		 4013 }
4014
bb262ef0
YW		 4015 old_master = link->master_ifindex;
4016 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
4017
d236718c 4018 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 4019 had_carrier = link_has_carrier(link);
4020
bb262ef0 4021 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 4022 if (r < 0)
4023 return r;
4024
d236718c
DS		 4025 if (!link_was_admin_up && (link->flags & IFF_UP)) {
4026 log_link_info(link, "Link UP");
4027
4028 r = link_admin_state_up(link);
4029 if (r < 0)
4030 return r;
4031 } else if (link_was_admin_up && !(link->flags & IFF_UP))
4032 log_link_info(link, "Link DOWN");
4033
273eec24
LP		 4034 r = link_update_lldp(link);
4035 if (r < 0)
4036 return r;
4037
a61bb41c
TG		 4038 carrier_gained = !had_carrier && link_has_carrier(link);
4039 carrier_lost = had_carrier && !link_has_carrier(link);
4040
4041 if (carrier_gained) {
6a7a4e4d 4042 log_link_info(link, "Gained carrier");
a61bb41c 4043
9c0a72f9
TG		 4044 r = link_carrier_gained(link);
4045 if (r < 0)
4046 return r;
a61bb41c 4047 } else if (carrier_lost) {
6a7a4e4d 4048 log_link_info(link, "Lost carrier");
a61bb41c 4049
9c0a72f9
TG		 4050 r = link_carrier_lost(link);
4051 if (r < 0)
a61bb41c 4052 return r;
a61bb41c
TG		 4053 }
4054
4055 return 0;
dd3efc09 4056}
fe8db0c5 4057
b295beea
LP		 4058static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
4059 bool space = false;
4060 Iterator i;
4061 Link *link;
4062
4063 assert(f);
4064 assert(prefix);
4065
4066 if (hashmap_isempty(h))
4067 return;
4068
0d536673 4069 fputs(prefix, f);
b295beea
LP		 4070 HASHMAP_FOREACH(link, h, i) {
4071 if (space)
0d536673 4072 fputc(' ', f);
b295beea
LP		 4073
4074 fprintf(f, "%i", link->ifindex);
4075 space = true;
4076 }
4077
0d536673 4078 fputc('\n', f);
b295beea
LP		 4079}
4080
15761549 4081static void link_save_dns(FILE *f, struct in_addr_data *dns, unsigned n_dns, bool *space) {
dddc8d1e 4082 for (unsigned j = 0; j < n_dns; j++) {
15761549 4083 _cleanup_free_ char *b = NULL;
dddc8d1e 4084 int r;
15761549
YW		 4085
4086 r = in_addr_to_string(dns[j].family, &dns[j].address, &b);
4087 if (r < 0) {
4088 log_debug_errno(r, "Failed to format address, ignoring: %m");
4089 continue;
4090 }
4091
4092 if (*space)
4093 fputc(' ', f);
4094 fputs(b, f);
4095 *space = true;
4096 }
4097}
4098
d5e172d2
ZJS		 4099static void serialize_addresses(
4100 FILE *f,
4101 const char *lvalue,
4102 bool *space,
4103 char **addresses,
4104 sd_dhcp_lease *lease,
4105 bool conditional,
ddb82ec2 4106 sd_dhcp_lease_server_type what,
d5e172d2
ZJS		 4107 sd_dhcp6_lease *lease6,
4108 bool conditional6,
4109 int (*lease6_get_addr)(sd_dhcp6_lease*, const struct in6_addr**),
4110 int (*lease6_get_fqdn)(sd_dhcp6_lease*, char ***)) {
4111 int r;
4112
4113 bool _space = false;
4114 if (!space)
4115 space = &_space;
4116
4117 if (lvalue)
4118 fprintf(f, "%s=", lvalue);
4119 fputstrv(f, addresses, NULL, space);
4120
4121 if (lease && conditional) {
4122 const struct in_addr *lease_addresses;
4123
4124 r = sd_dhcp_lease_get_servers(lease, what, &lease_addresses);
4125 if (r > 0)
d8bff5cc 4126 serialize_in_addrs(f, lease_addresses, r, space, in4_addr_is_non_local);
d5e172d2
ZJS		 4127 }
4128
4129 if (lease6 && conditional6 && lease6_get_addr) {
4130 const struct in6_addr *in6_addrs;
4131
4132 r = lease6_get_addr(lease6, &in6_addrs);
d8bff5cc
ZJS		 4133 if (r > 0)
4134 serialize_in6_addrs(f, in6_addrs, r, space);
d5e172d2
ZJS		 4135 }
4136
4137 if (lease6 && conditional6 && lease6_get_fqdn) {
4138 char **in6_hosts;
4139
4140 r = lease6_get_fqdn(lease6, &in6_hosts);
4141 if (r > 0)
4142 fputstrv(f, in6_hosts, NULL, space);
4143 }
4144
4145 if (lvalue)
4146 fputc('\n', f);
4147}
4148
fe8db0c5 4149int link_save(Link *link) {
d361b373 4150 const char *admin_state, *oper_state, *carrier_state, *address_state;
68a8723c 4151 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 4152 _cleanup_fclose_ FILE *f = NULL;
c1eb9872 4153 Route *route;
18d8a2cf 4154 Address *a;
e7780c8d 4155 Iterator i;
fe8db0c5
TG		 4156 int r;
4157
4158 assert(link);
4159 assert(link->state_file);
68a8723c 4160 assert(link->lease_file);
bbf7c048
TG		 4161 assert(link->manager);
4162
370e9930 4163 if (link->state == LINK_STATE_LINGER) {
6990fb6b 4164 (void) unlink(link->state_file);
370e9930
TG		 4165 return 0;
4166 }
4167
34437b4f
LP		 4168 link_lldp_save(link);
4169
deb2e523
TG		 4170 admin_state = link_state_to_string(link->state);
4171 assert(admin_state);
4172
e375dcde
TG		 4173 oper_state = link_operstate_to_string(link->operstate);
4174 assert(oper_state);
deb2e523 4175
ac999bf0
YW		 4176 carrier_state = link_carrier_state_to_string(link->carrier_state);
4177 assert(carrier_state);
4178
4179 address_state = link_address_state_to_string(link->address_state);
4180 assert(address_state);
4181
fe8db0c5
TG		 4182 r = fopen_temporary(link->state_file, &f, &temp_path);
4183 if (r < 0)
6a7a4e4d 4184 goto fail;
fe8db0c5 4185
5512a963 4186 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 4187
4188 fprintf(f,
4189 "# This is private data. Do not parse.\n"
deb2e523 4190 "ADMIN_STATE=%s\n"
ac999bf0
YW		 4191 "OPER_STATE=%s\n"
4192 "CARRIER_STATE=%s\n"
4193 "ADDRESS_STATE=%s\n",
4194 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 4195
bcb7a07e 4196 if (link->network) {
fe0e16db
YW		 4197 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
4198 const char *dhcp_domainname = NULL, *p;
07bdc70d 4199 sd_dhcp6_lease *dhcp6_lease = NULL;
fe0e16db 4200 bool space;
07bdc70d 4201
c1a38904
MTL		 4202 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
4203 yes_no(link->network->required_for_online));
4204
d5e172d2
ZJS		 4205 LinkOperationalStateRange st = link->network->required_operstate_for_online;
4206 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s%s%s\n",
4207 strempty(link_operstate_to_string(st.min)),
4208 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? ":" : "",
4209 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? strempty(link_operstate_to_string(st.max)) : "");
4ac77d63 4210
07bdc70d 4211 if (link->dhcp6_client) {
4058d339
TG		 4212 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
4213 if (r < 0 && r != -ENOMSG)
2206aa5c 4214 log_link_debug_errno(link, r, "Failed to get DHCPv6 lease: %m");
07bdc70d 4215 }
b0e39c82 4216
adc5b2e2
TG		 4217 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
4218
d5e172d2
ZJS		 4219 /************************************************************/
4220
0d536673 4221 fputs("DNS=", f);
ea352b40 4222 space = false;
15761549
YW		 4223 if (link->n_dns != (unsigned) -1)
4224 link_save_dns(f, link->dns, link->n_dns, &space);
4225 else
4226 link_save_dns(f, link->network->dns, link->network->n_dns, &space);
d5314fff 4227
d5e172d2
ZJS		 4228 serialize_addresses(f, NULL, &space,
4229 NULL,
4230 link->dhcp_lease,
4231 link->network->dhcp_use_dns,
ddb82ec2 4232 SD_DHCP_LEASE_DNS,
d5e172d2
ZJS		 4233 dhcp6_lease,
4234 link->network->dhcp6_use_dns,
4235 sd_dhcp6_lease_get_dns,
4236 NULL);
1e7a0e21
LP		 4237
4238 /* Make sure to flush out old entries before we use the NDISC data */
4239 ndisc_vacuum(link);
4240
b296797f 4241 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 4242 NDiscRDNSS *dd;
4243
d8bff5cc
ZJS		 4244 SET_FOREACH(dd, link->ndisc_rdnss, i)
4245 serialize_in6_addrs(f, &dd->address, 1, &space);
299d578f
SS		 4246 }
4247
4248 fputc('\n', f);
4249
d5e172d2
ZJS		 4250 /************************************************************/
4251
4252 serialize_addresses(f, "NTP", NULL,
4253 link->ntp ?: link->network->ntp,
4254 link->dhcp_lease,
4255 link->network->dhcp_use_ntp,
ddb82ec2 4256 SD_DHCP_LEASE_NTP,
d5e172d2
ZJS		 4257 dhcp6_lease,
4258 link->network->dhcp6_use_ntp,
4259 sd_dhcp6_lease_get_ntp_addrs,
4260 sd_dhcp6_lease_get_ntp_fqdn);
4261
4262 serialize_addresses(f, "SIP", NULL,
2a71d57f 4263 NULL,
d5e172d2
ZJS		 4264 link->dhcp_lease,
4265 link->network->dhcp_use_sip,
ddb82ec2 4266 SD_DHCP_LEASE_SIP,
2a71d57f 4267 NULL, false, NULL, NULL);
d5e172d2
ZJS		 4268
4269 /************************************************************/
bd8f6538 4270
b2a81c0b 4271 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 4272 if (link->dhcp_lease) {
b2a81c0b 4273 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 4274 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
4275 }
b2a81c0b
LP		 4276 if (dhcp6_lease)
4277 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 4278 }
4279
fe0e16db
YW		 4280 fputs("DOMAINS=", f);
4281 space = false;
15761549 4282 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains, i)
fe0e16db 4283 fputs_with_space(f, p, NULL, &space);
07bdc70d 4284
1e7a0e21 4285 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP		 4286 if (dhcp_domainname)
4287 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4288 if (dhcp_domains)
4289 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4290 if (dhcp6_domains)
4291 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 4292 }
4293
4294 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
4295 NDiscDNSSL *dd;
1e7a0e21
LP		 4296
4297 SET_FOREACH(dd, link->ndisc_dnssl, i)
4298 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4299 }
b2a81c0b 4300
0d536673 4301 fputc('\n', f);
6192b846 4302
d5e172d2
ZJS		 4303 /************************************************************/
4304
fe0e16db
YW		 4305 fputs("ROUTE_DOMAINS=", f);
4306 space = false;
15761549 4307 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains, i)
fe0e16db 4308 fputs_with_space(f, p, NULL, &space);
b2a81c0b 4309
1e7a0e21 4310 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
1e7a0e21
LP		 4311 if (dhcp_domainname)
4312 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4313 if (dhcp_domains)
4314 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4315 if (dhcp6_domains)
4316 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 4317 }
4318
4319 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
4320 NDiscDNSSL *dd;
1e7a0e21
LP		 4321
4322 SET_FOREACH(dd, link->ndisc_dnssl, i)
4323 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4324 }
b2a81c0b 4325
0d536673 4326 fputc('\n', f);
67272d15 4327
d5e172d2
ZJS		 4328 /************************************************************/
4329
3c9b8860 4330 fprintf(f, "LLMNR=%s\n",
15761549 4331 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
d5e172d2
ZJS		 4332
4333 /************************************************************/
4334
aaa297d4 4335 fprintf(f, "MDNS=%s\n",
15761549 4336 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
15761549 4337
d5e172d2
ZJS		 4338 /************************************************************/
4339
4340 int dns_default_route =
4341 link->dns_default_route >= 0 ? link->dns_default_route :
4342 link->network->dns_default_route;
4343 if (dns_default_route >= 0)
4344 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(dns_default_route));
4345
4346 /************************************************************/
4347
4348 DnsOverTlsMode dns_over_tls_mode =
4349 link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID ? link->dns_over_tls_mode :
4350 link->network->dns_over_tls_mode;
4351 if (dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
4352 fprintf(f, "DNS_OVER_TLS=%s\n", dns_over_tls_mode_to_string(dns_over_tls_mode));
4353
4354 /************************************************************/
4355
4356 DnssecMode dnssec_mode =
4357 link->dnssec_mode != _DNSSEC_MODE_INVALID ? link->dnssec_mode :
4358 link->network->dnssec_mode;
4359 if (dnssec_mode != _DNSSEC_MODE_INVALID)
4360 fprintf(f, "DNSSEC=%s\n", dnssec_mode_to_string(dnssec_mode));
4361
4362 /************************************************************/
4363
4364 Set *nta_anchors = link->dnssec_negative_trust_anchors;
4365 if (set_isempty(nta_anchors))
4366 nta_anchors = link->network->dnssec_negative_trust_anchors;
4367
4368 if (!set_isempty(nta_anchors)) {
8a516214
LP		 4369 const char *n;
4370
0d536673 4371 fputs("DNSSEC_NTA=", f);
8a516214 4372 space = false;
d5e172d2 4373 SET_FOREACH(n, nta_anchors, i)
d390f8ef 4374 fputs_with_space(f, n, NULL, &space);
0d536673 4375 fputc('\n', f);
8a516214
LP		 4376 }
4377
d5e172d2
ZJS		 4378 /************************************************************/
4379
0d536673 4380 fputs("ADDRESSES=", f);
e7780c8d
TG		 4381 space = false;
4382 SET_FOREACH(a, link->addresses, i) {
4383 _cleanup_free_ char *address_str = NULL;
4384
4385 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
4386 if (r < 0)
4387 goto fail;
4388
e7780c8d
TG		 4389 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
4390 space = true;
4391 }
0d536673 4392 fputc('\n', f);
c1eb9872 4393
d5e172d2
ZJS		 4394 /************************************************************/
4395
0d536673 4396 fputs("ROUTES=", f);
c1eb9872
TG		 4397 space = false;
4398 SET_FOREACH(route, link->routes, i) {
4399 _cleanup_free_ char *route_str = NULL;
4400
4401 r = in_addr_to_string(route->family, &route->dst, &route_str);
4402 if (r < 0)
4403 goto fail;
4404
ecc3f340
ZJS		 4405 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
4406 space ? " " : "", route_str,
f833694d 4407 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 4408 space = true;
4409 }
4410
0d536673 4411 fputc('\n', f);
bcb7a07e 4412 }
7374f9d8 4413
b295beea
LP		 4414 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
4415 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 4416
8eb9058d 4417 if (link->dhcp_lease) {
bd91b83e 4418 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 4419 if (r < 0)
c2d6bd61 4420 goto fail;
fe8db0c5 4421
7374f9d8 4422 fprintf(f,
b0e39c82
TG		 4423 "DHCP_LEASE=%s\n",
4424 link->lease_file);
deb2e523 4425 } else
6990fb6b 4426 (void) unlink(link->lease_file);
fe8db0c5 4427
0bc70f1d
TG		 4428 if (link->ipv4ll) {
4429 struct in_addr address;
4430
4431 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
4432 if (r >= 0) {
0d536673 4433 fputs("IPV4LL_ADDRESS=", f);
072320ea 4434 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 4435 fputc('\n', f);
0bc70f1d
TG		 4436 }
4437 }
4438
7e738e7b
SS		 4439 if (link->dhcp6_client) {
4440 _cleanup_free_ char *duid = NULL;
4441 uint32_t iaid;
4442
4443 r = sd_dhcp6_client_get_iaid(link->dhcp6_client, &iaid);
4444 if (r >= 0)
4445 fprintf(f, "DHCP6_CLIENT_IAID=0x%x\n", iaid);
4446
4447 r = sd_dhcp6_client_duid_as_string(link->dhcp6_client, &duid);
4448 if (r >= 0)
4449 fprintf(f, "DHCP6_CLIENT_DUID=%s\n", duid);
4450 }
18d8a2cf 4451
c2d6bd61
LP		 4452 r = fflush_and_check(f);
4453 if (r < 0)
4454 goto fail;
fe8db0c5 4455
c2d6bd61 4456 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 4457 r = -errno;
c2d6bd61 4458 goto fail;
fe8db0c5
TG		 4459 }
4460
c2d6bd61 4461 return 0;
dacd6cee 4462
c2d6bd61 4463fail:
6a7a4e4d 4464 (void) unlink(link->state_file);
6a7a4e4d
LP		 4465 if (temp_path)
4466 (void) unlink(temp_path);
4467
dacd6cee 4468 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 4469}
4470
84de38c5
TG		 4471/* The serialized state in /run is no longer up-to-date. */
4472void link_dirty(Link *link) {
4473 int r;
4474
4475 assert(link);
4476
0c241a37
SS		 4477 /* mark manager dirty as link is dirty */
4478 manager_dirty(link->manager);
4479
de7fef4b 4480 r = set_ensure_put(&link->manager->dirty_links, NULL, link);
0c241a37 4481 if (r <= 0)
de7fef4b 4482 /* Ignore allocation errors and don't take another ref if the link was already dirty */
84de38c5 4483 return;
84de38c5
TG		 4484 link_ref(link);
4485}
4486
4487/* The serialized state in /run is up-to-date */
4488void link_clean(Link *link) {
4489 assert(link);
4490 assert(link->manager);
4491
1046bf9b 4492 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4493}
4494
fe8db0c5 4495static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4496 [LINK_STATE_PENDING] = "pending",
bd08ce56 4497 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 4498 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 4499 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4500 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4501 [LINK_STATE_FAILED] = "failed",
370e9930 4502 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4503};
4504
4505DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
5ecb131d
YW		 4506
4507int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg) {
4508 const char *err_msg = NULL;
4509
4510 (void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg);
ab119e63
YW		 4511 return log_link_full(link, level, err,
4512 "%s: %s%s%s%m",
4513 msg,
4514 strempty(err_msg),
4515 err_msg && !endswith(err_msg, ".") ? "." : "",
4516 err_msg ? " " : "");
5ecb131d 4517}
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