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tree-wide: define iterator inside of the macro
[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;
14153d1b 368
84de38c5
TG		 369 assert(link);
370
371 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 372 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 373 else if (link_has_carrier(link)) {
1678fbb3
YW		 374 if (link_is_enslaved(link))
375 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 376 else
1678fbb3 377 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 378 } else if (link->flags & IFF_UP)
1678fbb3 379 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 380 else
1678fbb3 381 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 382
1678fbb3 383 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 384 Link *slave;
385
90e74a66 386 SET_FOREACH(slave, link->slaves) {
959f65d3 387 link_update_operstate(slave, false);
84de38c5 388
1678fbb3
YW		 389 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
390 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 391 }
959f65d3 392 }
84de38c5 393
90e74a66 394 SET_FOREACH(address, link->addresses) {
1678fbb3
YW		 395 if (!address_is_ready(address))
396 continue;
84de38c5 397
1678fbb3
YW		 398 if (address->scope < scope)
399 scope = address->scope;
400 }
84de38c5 401
1678fbb3 402 /* for operstate we also take foreign addresses into account */
90e74a66 403 SET_FOREACH(address, link->addresses_foreign) {
1678fbb3
YW		 404 if (!address_is_ready(address))
405 continue;
406
407 if (address->scope < scope)
408 scope = address->scope;
409 }
410
411 if (scope < RT_SCOPE_SITE)
412 /* universally accessible addresses found */
413 address_state = LINK_ADDRESS_STATE_ROUTABLE;
414 else if (scope < RT_SCOPE_HOST)
415 /* only link or site local addresses found */
416 address_state = LINK_ADDRESS_STATE_DEGRADED;
84de38c5 417 else
1678fbb3
YW		 418 /* no useful addresses found */
419 address_state = LINK_ADDRESS_STATE_OFF;
420
421 /* Mapping of address and carrier state vs operational state
422 * carrier state
423 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
424 * ------------------------------------------------------------------------------
425 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
426 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
427 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
428 */
84de38c5 429
1678fbb3
YW		 430 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
431 operstate = (LinkOperationalState) carrier_state;
432 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
433 operstate = LINK_OPERSTATE_ROUTABLE;
434 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
435 operstate = LINK_OPERSTATE_DEGRADED;
436 else
14153d1b
YW		 437 operstate = LINK_OPERSTATE_ENSLAVED;
438
35c5a9ca
YW		 439 if (link->carrier_state != carrier_state) {
440 link->carrier_state = carrier_state;
441 changed = true;
442 if (strv_extend(&p, "CarrierState") < 0)
443 log_oom();
444 }
959f65d3 445
35c5a9ca
YW		 446 if (link->address_state != address_state) {
447 link->address_state = address_state;
448 changed = true;
449 if (strv_extend(&p, "AddressState") < 0)
450 log_oom();
959f65d3
YW		 451 }
452
84de38c5
TG		 453 if (link->operstate != operstate) {
454 link->operstate = operstate;
35c5a9ca
YW		 455 changed = true;
456 if (strv_extend(&p, "OperationalState") < 0)
457 log_oom();
84de38c5 458 }
959f65d3 459
35c5a9ca
YW		 460 if (p)
461 link_send_changed_strv(link, p);
462 if (changed)
463 link_dirty(link);
464
45e11abf
YW		 465 if (also_update_master && link->network) {
466 link_update_master_operstate(link, link->network->bond);
467 link_update_master_operstate(link, link->network->bridge);
959f65d3 468 }
84de38c5
TG		 469}
470
51d18171
TG		 471#define FLAG_STRING(string, flag, old, new) \
472 (((old ^ new) & flag) \
473 ? ((old & flag) ? (" -" string) : (" +" string)) \
474 : "")
475
bb262ef0 476static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 477 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
478 uint8_t operstate;
479 int r;
480
481 assert(link);
482
483 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 484 if (r < 0)
485 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 486
1c4baffc 487 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 488 if (r < 0)
489 /* if we got a message without operstate, take it to mean
490 the state was unchanged */
491 operstate = link->kernel_operstate;
492
bb262ef0 493 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 494 return 0;
495
496 if (link->flags != flags) {
6a7a4e4d 497 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		 498 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
499 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
500 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
501 FLAG_STRING("UP", IFF_UP, link->flags, flags),
502 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
503 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
504 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
505 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
506 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
507 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
508 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
509 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
510 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
511 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
512 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
513 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
514 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
515 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
516 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
517
518 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
519 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
520 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
521 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
522 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
523 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
524 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
525 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
526
527 /* link flags are currently at most 18 bits, let's align to
528 * printing 20 */
529 if (unknown_flags_added)
79008bdd 530 log_link_debug(link,
6a7a4e4d 531 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 532 unknown_flags_added);
533
534 if (unknown_flags_removed)
79008bdd 535 log_link_debug(link,
6a7a4e4d 536 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 537 unknown_flags_removed);
538 }
539
540 link->flags = flags;
541 link->kernel_operstate = operstate;
542
959f65d3 543 link_update_operstate(link, true);
51d18171
TG		 544
545 return 0;
546}
547
1c4baffc 548static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 549 _cleanup_(link_unrefp) Link *link = NULL;
6cad256d 550 const char *ifname, *kind = NULL;
b710e6b6 551 unsigned short iftype;
572b21d9
YW		 552 int r, ifindex;
553 uint16_t type;
f579559b 554
0c2f9b84 555 assert(manager);
505f8da7 556 assert(message);
f579559b
TG		 557 assert(ret);
558
6cad256d
TJ		 559 /* check for link kind */
560 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
561 if (r == 0) {
db2f8a2e 562 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 563 r = sd_netlink_message_exit_container(message);
564 if (r < 0)
565 return r;
566 }
567
1c4baffc 568 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 569 if (r < 0)
570 return r;
571 else if (type != RTM_NEWLINK)
572 return -EINVAL;
573
574 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
575 if (r < 0)
576 return r;
577 else if (ifindex <= 0)
578 return -EINVAL;
579
b710e6b6
LP		 580 r = sd_rtnl_message_link_get_type(message, &iftype);
581 if (r < 0)
582 return r;
583
1c4baffc 584 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 585 if (r < 0)
586 return r;
587
17f9c355 588 link = new(Link, 1);
f579559b
TG		 589 if (!link)
590 return -ENOMEM;
591
17f9c355
YW		 592 *link = (Link) {
593 .n_ref = 1,
594 .manager = manager,
595 .state = LINK_STATE_PENDING,
17f9c355
YW		 596 .ifindex = ifindex,
597 .iftype = iftype,
15761549
YW		 598
599 .n_dns = (unsigned) -1,
600 .dns_default_route = -1,
601 .llmnr = _RESOLVE_SUPPORT_INVALID,
602 .mdns = _RESOLVE_SUPPORT_INVALID,
603 .dnssec_mode = _DNSSEC_MODE_INVALID,
604 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
17f9c355
YW		 605 };
606
505f8da7
TG		 607 link->ifname = strdup(ifname);
608 if (!link->ifname)
609 return -ENOMEM;
f579559b 610
6cad256d
TJ		 611 if (kind) {
612 link->kind = strdup(kind);
613 if (!link->kind)
614 return -ENOMEM;
615 }
616
cbff7170
TJ		 617 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
618 if (r < 0)
619 log_link_debug_errno(link, r, "New device has no master, continuing without");
620
1c4baffc 621 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 622 if (r < 0)
34437b4f 623 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 624
c643bda5 625 r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac);
4bb7cc82
YW		 626 if (r < 0)
627 log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
628
c643bda5
YW		 629 r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver);
630 if (r < 0)
631 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
632
572b21d9
YW		 633 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &link->alternative_names);
634 if (r < 0 && r != -ENODATA)
635 return r;
636
34437b4f 637 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 638 return -ENOMEM;
fe8db0c5 639
34437b4f 640 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 641 return -ENOMEM;
642
34437b4f 643 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 644 return -ENOMEM;
645
d5099efc 646 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 647 if (r < 0)
648 return r;
649
650 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 651 if (r < 0)
652 return r;
653
bb262ef0 654 r = link_update_flags(link, message, false);
51d18171
TG		 655 if (r < 0)
656 return r;
657
1cc6c93a 658 *ret = TAKE_PTR(link);
f579559b
TG		 659
660 return 0;
661}
662
15761549
YW		 663void link_ntp_settings_clear(Link *link) {
664 link->ntp = strv_free(link->ntp);
665}
666
667void link_dns_settings_clear(Link *link) {
e77bd3fd
YW		 668 if (link->n_dns != (unsigned) -1)
669 for (unsigned i = 0; i < link->n_dns; i++)
670 in_addr_full_free(link->dns[i]);
15761549
YW		 671 link->dns = mfree(link->dns);
672 link->n_dns = (unsigned) -1;
673
674 link->search_domains = ordered_set_free_free(link->search_domains);
675 link->route_domains = ordered_set_free_free(link->route_domains);
676
677 link->dns_default_route = -1;
678 link->llmnr = _RESOLVE_SUPPORT_INVALID;
679 link->mdns = _RESOLVE_SUPPORT_INVALID;
680 link->dnssec_mode = _DNSSEC_MODE_INVALID;
681 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
682
683 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
684}
685
1a6bb31f
YW		 686static void link_free_engines(Link *link) {
687 if (!link)
688 return;
689
690 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
691 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
692 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
1a6bb31f
YW		 693
694 link->lldp = sd_lldp_unref(link->lldp);
695
696 ndisc_flush(link);
697
698 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
699 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 700 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
1a6bb31f
YW		 701 link->ndisc = sd_ndisc_unref(link->ndisc);
702 link->radv = sd_radv_unref(link->radv);
703}
704
8301aa0b 705static Link *link_free(Link *link) {
428fd0a7
TG		 706 Address *address;
707
8301aa0b 708 assert(link);
f579559b 709
15761549
YW		 710 link_ntp_settings_clear(link);
711 link_dns_settings_clear(link);
712
8eec0b9d
YW		 713 link->routes = set_free(link->routes);
714 link->routes_foreign = set_free(link->routes_foreign);
6e537f62
YW		 715 link->dhcp_routes = set_free(link->dhcp_routes);
716 link->dhcp_routes_old = set_free(link->dhcp_routes_old);
1633c457
YW		 717 link->dhcp6_routes = set_free(link->dhcp6_routes);
718 link->dhcp6_routes_old = set_free(link->dhcp6_routes_old);
719 link->dhcp6_pd_routes = set_free(link->dhcp6_pd_routes);
720 link->dhcp6_pd_routes_old = set_free(link->dhcp6_pd_routes_old);
69203fba 721 link->ndisc_routes = set_free(link->ndisc_routes);
adda1ed9 722
8eec0b9d
YW		 723 link->nexthops = set_free(link->nexthops);
724 link->nexthops_foreign = set_free(link->nexthops_foreign);
c16c7808 725
8eec0b9d
YW		 726 link->neighbors = set_free(link->neighbors);
727 link->neighbors_foreign = set_free(link->neighbors_foreign);
d1bdafd2 728
8eec0b9d
YW		 729 link->addresses = set_free(link->addresses);
730 link->addresses_foreign = set_free(link->addresses_foreign);
e5526518 731 link->static_addresses = set_free(link->static_addresses);
1633c457
YW		 732 link->dhcp6_addresses = set_free(link->dhcp6_addresses);
733 link->dhcp6_addresses_old = set_free(link->dhcp6_addresses_old);
734 link->dhcp6_pd_addresses = set_free(link->dhcp6_pd_addresses);
735 link->dhcp6_pd_addresses_old = set_free(link->dhcp6_pd_addresses_old);
69203fba 736 link->ndisc_addresses = set_free(link->ndisc_addresses);
adda1ed9 737
11bf3cce
LP		 738 while ((address = link->pool_addresses)) {
739 LIST_REMOVE(addresses, link->pool_addresses, address);
740 address_free(address);
741 }
742
7272b25e 743 link_lldp_emit_stop(link);
1a6bb31f 744 link_free_engines(link);
68a8723c 745 free(link->lease_file);
49699bac
SS		 746 free(link->lldp_file);
747
c166a070 748 free(link->ifname);
572b21d9 749 strv_free(link->alternative_names);
ceac4078 750 free(link->kind);
8d968fdd 751 free(link->ssid);
c643bda5 752 free(link->driver);
6cad256d 753
db2f8a2e 754 (void) unlink(link->state_file);
fe8db0c5 755 free(link->state_file);
c166a070 756
51517f9e 757 sd_device_unref(link->sd_device);
b5db00e5 758
0d4ad91d 759 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 760 hashmap_free(link->bound_by_links);
761
5f707e12 762 set_free_with_destructor(link->slaves, link_unref);
033295c1 763
c9c908a6
YW		 764 network_unref(link->network);
765
8301aa0b 766 return mfree(link);
14b746f7
TG		 767}
768
8301aa0b 769DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 770
11a7f229
TG		 771int link_get(Manager *m, int ifindex, Link **ret) {
772 Link *link;
11a7f229
TG		 773
774 assert(m);
e856ed00 775 assert(ifindex > 0);
11a7f229
TG		 776 assert(ret);
777
ae06ab10 778 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 779 if (!link)
780 return -ENODEV;
781
782 *ret = link;
783
784 return 0;
785}
786
af9ba57a 787void link_set_state(Link *link, LinkState state) {
e331e246
TG		 788 assert(link);
789
790 if (link->state == state)
791 return;
792
0beb9542
YW		 793 log_link_debug(link, "State changed: %s -> %s",
794 link_state_to_string(link->state),
795 link_state_to_string(state));
796
e331e246
TG		 797 link->state = state;
798
799 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 800}
801
57bd6899
TG		 802static void link_enter_unmanaged(Link *link) {
803 assert(link);
804
e331e246 805 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 806
84de38c5 807 link_dirty(link);
57bd6899
TG		 808}
809
95355a28 810int link_stop_clients(Link *link, bool may_keep_dhcp) {
111bb8f9 811 int r = 0, k;
051e77ca 812 Address *ad;
111bb8f9
TG		 813
814 assert(link);
815 assert(link->manager);
816 assert(link->manager->event);
817
80060352
ZJS		 818 bool keep_dhcp = may_keep_dhcp &&
819 link->network &&
820 (link->manager->restarting ||
821 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
822
823 if (link->dhcp_client && !keep_dhcp) {
111bb8f9 824 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 825 if (k < 0)
36c7d709 826 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 827 }
828
ba179154 829 if (link->ipv4ll) {
111bb8f9 830 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 831 if (k < 0)
36c7d709 832 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 833 }
834
051e77ca
SS		 835 if (link->network)
836 LIST_FOREACH(addresses, ad, link->network->static_addresses)
837 if (ad->acd && sd_ipv4acd_is_running(ad->acd) == 0) {
838 k = sd_ipv4acd_stop(ad->acd);
839 if (k < 0)
840 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
841 }
842
f5a8c43f
TG		 843 if (link->dhcp6_client) {
844 k = sd_dhcp6_client_stop(link->dhcp6_client);
845 if (k < 0)
36c7d709 846 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 847 }
4138fb2c 848
1633c457
YW		 849 if (link_dhcp6_pd_is_enabled(link)) {
850 k = dhcp6_pd_remove(link);
851 if (k < 0)
852 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
853 }
854
1e7a0e21
LP		 855 if (link->ndisc) {
856 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 857 if (k < 0)
36c7d709 858 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 859 }
860
7465dd22 861 if (link->radv) {
290696e5 862 k = sd_radv_stop(link->radv);
7465dd22
PF		 863 if (k < 0)
864 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
865 }
866
7272b25e 867 link_lldp_emit_stop(link);
111bb8f9
TG		 868 return r;
869}
870
b22d8a00 871void link_enter_failed(Link *link) {
ef1ba606 872 assert(link);
f882c247 873
370e9930 874 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 875 return;
876
6a7a4e4d 877 log_link_warning(link, "Failed");
449f7554 878
e331e246 879 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 880
95355a28 881 link_stop_clients(link, false);
111bb8f9 882
84de38c5 883 link_dirty(link);
f882c247
TG		 884}
885
7033af49
YW		 886static int link_join_netdevs_after_configured(Link *link) {
887 NetDev *netdev;
7033af49
YW		 888 int r;
889
90e74a66 890 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7033af49
YW		 891 if (netdev->ifindex > 0)
892 /* Assume already enslaved. */
893 continue;
894
895 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
896 continue;
897
898 log_struct(LOG_DEBUG,
899 LOG_LINK_INTERFACE(link),
900 LOG_NETDEV_INTERFACE(netdev),
901 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
902
903 r = netdev_join(netdev, link, NULL);
904 if (r < 0)
905 return log_struct_errno(LOG_WARNING, r,
906 LOG_LINK_INTERFACE(link),
907 LOG_NETDEV_INTERFACE(netdev),
908 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
909 }
910
911 return 0;
912}
913
e3a7b048 914static void link_enter_configured(Link *link) {
dd43110f
TG		 915 assert(link);
916 assert(link->network);
e3a7b048 917
289e6774 918 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 919 return;
dd43110f 920
e331e246 921 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 922
7033af49
YW		 923 (void) link_join_netdevs_after_configured(link);
924
84de38c5 925 link_dirty(link);
dd43110f
TG		 926}
927
47079967 928static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 929 RoutingPolicyRule *rule, *rrule = NULL;
930 int r;
931
932 assert(link);
933 assert(link->network);
934
2428613f
YW		 935 link->routing_policy_rules_configured = false;
936
8a9b3a23 937 LIST_FOREACH(rules, rule, link->network->rules) {
b80a511b 938 r = routing_policy_rule_get(link->manager, rule, &rrule);
ff14e2eb
YW		 939 if (r >= 0) {
940 if (r == 0)
941 (void) routing_policy_rule_make_local(link->manager, rrule);
8a9b3a23
SS		 942 continue;
943 }
944
9f08a578 945 r = routing_policy_rule_configure(rule, link, NULL);
4ff296b0
YW		 946 if (r < 0)
947 return log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
7ef7e550
YW		 948 if (r > 0)
949 link->routing_policy_rule_messages++;
8a9b3a23
SS		 950 }
951
952 routing_policy_rule_purge(link->manager, link);
5d976f5f 953 if (link->routing_policy_rule_messages == 0)
7715629e 954 link->routing_policy_rules_configured = true;
5d976f5f 955 else {
7715629e 956 log_link_debug(link, "Setting routing policy rules");
b425c3ae
YW		 957 link_set_state(link, LINK_STATE_CONFIGURING);
958 }
8a9b3a23
SS		 959
960 return 0;
961}
962
c16c7808
SS		 963static int nexthop_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
964 int r;
965
966 assert(link);
967 assert(link->nexthop_messages > 0);
968 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
969 LINK_STATE_FAILED, LINK_STATE_LINGER));
970
971 link->nexthop_messages--;
972
973 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
974 return 1;
975
976 r = sd_netlink_message_get_errno(m);
977 if (r < 0 && r != -EEXIST) {
5ecb131d 978 log_link_message_warning_errno(link, m, r, "Could not set nexthop");
c16c7808
SS		 979 link_enter_failed(link);
980 return 1;
981 }
982
983 if (link->nexthop_messages == 0) {
984 log_link_debug(link, "Nexthop set");
985 link->static_nexthops_configured = true;
986 link_check_ready(link);
987 }
988
989 return 1;
990}
991
eb01a2df 992static int link_request_set_nexthop(Link *link) {
c16c7808
SS		 993 NextHop *nh;
994 int r;
995
0c816fcc
YW		 996 link->static_nexthops_configured = false;
997
c16c7808
SS		 998 LIST_FOREACH(nexthops, nh, link->network->static_nexthops) {
999 r = nexthop_configure(nh, link, nexthop_handler);
1000 if (r < 0)
1001 return log_link_warning_errno(link, r, "Could not set nexthop: %m");
1002 if (r > 0)
1003 link->nexthop_messages++;
1004 }
1005
1006 if (link->nexthop_messages == 0) {
1007 link->static_nexthops_configured = true;
1008 link_check_ready(link);
1009 } else {
1010 log_link_debug(link, "Setting nexthop");
1011 link_set_state(link, LINK_STATE_CONFIGURING);
1012 }
1013
1014 return 1;
1015}
1016
302a796f 1017static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1018 int r;
1019
1046bf9b 1020 assert(link);
7715629e 1021 assert(link->route_messages > 0);
289e6774
WKI		 1022 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
1023 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1024
7715629e 1025 link->route_messages--;
f882c247 1026
77a008c0 1027 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1028 return 1;
1029
1c4baffc 1030 r = sd_netlink_message_get_errno(m);
4ff296b0 1031 if (r < 0 && r != -EEXIST) {
5ecb131d 1032 log_link_message_warning_errno(link, m, r, "Could not set route");
4ff296b0
YW		 1033 link_enter_failed(link);
1034 return 1;
1035 }
f882c247 1036
7715629e 1037 if (link->route_messages == 0) {
6a7a4e4d 1038 log_link_debug(link, "Routes set");
7715629e 1039 link->static_routes_configured = true;
0c816fcc 1040 link_request_set_nexthop(link);
dd3efc09 1041 }
f882c247
TG		 1042
1043 return 1;
1044}
1045
b5799eeb 1046int link_request_set_routes(Link *link) {
bf61b05a
LP		 1047 enum {
1048 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
1049 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
1050 _PHASE_MAX
1051 } phase;
a6cc569e 1052 Route *rt;
f882c247
TG		 1053 int r;
1054
1055 assert(link);
1056 assert(link->network);
289e6774 1057 assert(link->state != _LINK_STATE_INVALID);
f882c247 1058
2428613f 1059 link->static_routes_configured = false;
27c34f73 1060
e5526518
YW		 1061 if (!link->addresses_ready)
1062 return 0;
1063
4e2ef9d9
YW		 1064 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
1065 /* During configuring addresses, the link lost its carrier. As networkd is dropping
1066 * the addresses now, let's not configure the routes either. */
1067 return 0;
1068
47079967 1069 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 1070 if (r < 0)
1071 return r;
f882c247 1072
bf61b05a
LP		 1073 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
1074 for (phase = 0; phase < _PHASE_MAX; phase++)
1075 LIST_FOREACH(routes, rt, link->network->static_routes) {
1985c54f
YW		 1076 if (rt->gateway_from_dhcp)
1077 continue;
0d34228f 1078
6ff5cc6b 1079 if ((in_addr_is_null(rt->family, &rt->gw) && ordered_set_isempty(rt->multipath_routes)) != (phase == PHASE_NON_GATEWAY))
bf61b05a 1080 continue;
a6cc569e 1081
80b0e860 1082 r = route_configure(rt, link, route_handler, NULL);
4ff296b0
YW		 1083 if (r < 0)
1084 return log_link_warning_errno(link, r, "Could not set routes: %m");
c4423317
YW		 1085 if (r > 0)
1086 link->route_messages++;
0d34228f 1087 }
f5be5601 1088
7715629e
ST		 1089 if (link->route_messages == 0) {
1090 link->static_routes_configured = true;
0c816fcc 1091 link_request_set_nexthop(link);
b425c3ae 1092 } else {
6a7a4e4d 1093 log_link_debug(link, "Setting routes");
b425c3ae
YW		 1094 link_set_state(link, LINK_STATE_CONFIGURING);
1095 }
f882c247
TG		 1096
1097 return 0;
1098}
1099
6accfd31
DA		 1100void link_check_ready(Link *link) {
1101 Address *a;
6accfd31
DA		 1102
1103 assert(link);
1104
5f58af25
YW		 1105 if (link->state == LINK_STATE_CONFIGURED)
1106 return;
1107
1108 if (link->state != LINK_STATE_CONFIGURING) {
1109 log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31 1110 return;
39373cb9 1111 }
6accfd31
DA		 1112
1113 if (!link->network)
1114 return;
1115
39373cb9
YW		 1116 if (!link->addresses_configured) {
1117 log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 1118 return;
39373cb9 1119 }
6accfd31 1120
39373cb9
YW		 1121 if (!link->neighbors_configured) {
1122 log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
6accfd31 1123 return;
39373cb9 1124 }
6accfd31 1125
90e74a66 1126 SET_FOREACH(a, link->addresses)
39373cb9
YW		 1127 if (!address_is_ready(a)) {
1128 _cleanup_free_ char *str = NULL;
1129
1130 (void) in_addr_to_string(a->family, &a->in_addr, &str);
1131 log_link_debug(link, "%s(): an address %s/%d is not ready.", __func__, strnull(str), a->prefixlen);
6aa5773b 1132 return;
39373cb9 1133 }
6aa5773b 1134
39373cb9
YW		 1135 if (!link->static_routes_configured) {
1136 log_link_debug(link, "%s(): static routes are not configured.", __func__);
6accfd31 1137 return;
39373cb9 1138 }
6accfd31 1139
39373cb9
YW		 1140 if (!link->static_nexthops_configured) {
1141 log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 1142 return;
39373cb9 1143 }
c16c7808 1144
39373cb9
YW		 1145 if (!link->routing_policy_rules_configured) {
1146 log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 1147 return;
39373cb9 1148 }
6accfd31 1149
39373cb9
YW		 1150 if (!link->tc_configured) {
1151 log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
4ecdcb07 1152 return;
39373cb9 1153 }
4ecdcb07 1154
39373cb9
YW		 1155 if (!link->sr_iov_configured) {
1156 log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 1157 return;
39373cb9 1158 }
518cd6b5 1159
463797c1 1160 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
50550722
YW		 1161 bool has_ndisc_address = false;
1162 NDiscAddress *n;
6accfd31 1163
1c09d84e 1164 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !link->ipv4ll_address_configured) {
39373cb9 1165 log_link_debug(link, "%s(): IPv4LL is not configured.", __func__);
463797c1 1166 return;
39373cb9 1167 }
6accfd31 1168
463797c1 1169 if (link_ipv6ll_enabled(link) &&
39373cb9
YW		 1170 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
1171 log_link_debug(link, "%s(): IPv6LL is not configured.", __func__);
463797c1 1172 return;
39373cb9 1173 }
6accfd31 1174
90e74a66 1175 SET_FOREACH(n, link->ndisc_addresses)
50550722
YW		 1176 if (!n->marked) {
1177 has_ndisc_address = true;
1178 break;
1179 }
1180
15797d6a 1181 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
50550722 1182 !link->dhcp_address && set_isempty(link->dhcp6_addresses) && !has_ndisc_address &&
15797d6a
YW		 1183 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
1184 log_link_debug(link, "%s(): DHCP4 or DHCP6 is enabled but no dynamic address is assigned yet.", __func__);
659ad3a0
YW		 1185 return;
1186 }
1187
1633c457 1188 if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_dhcp6_pd_is_enabled(link) || link_ipv6_accept_ra_enabled(link)) {
39373cb9
YW		 1189 if (!link->dhcp4_configured &&
1190 !(link->dhcp6_address_configured && link->dhcp6_route_configured) &&
1191 !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) &&
d98c546d 1192 !(link->ndisc_addresses_configured && link->ndisc_routes_configured) &&
1c09d84e 1193 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
39373cb9
YW		 1194 /* When DHCP or RA is enabled, at least one protocol must provide an address, or
1195 * an IPv4ll fallback address must be configured. */
1196 log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
1197 return;
1198 }
1199
d98c546d 1200 log_link_debug(link, "%s(): dhcp4:%s dhcp6_addresses:%s dhcp_routes:%s dhcp_pd_addresses:%s dhcp_pd_routes:%s ndisc_addresses:%s ndisc_routes:%s",
39373cb9
YW		 1201 __func__,
1202 yes_no(link->dhcp4_configured),
1203 yes_no(link->dhcp6_address_configured),
1204 yes_no(link->dhcp6_route_configured),
1205 yes_no(link->dhcp6_pd_address_configured),
1206 yes_no(link->dhcp6_pd_route_configured),
d98c546d
YW		 1207 yes_no(link->ndisc_addresses_configured),
1208 yes_no(link->ndisc_routes_configured));
39373cb9 1209 }
463797c1 1210 }
6accfd31 1211
5f58af25 1212 link_enter_configured(link);
6accfd31
DA		 1213
1214 return;
1215}
1216
e4a71bf3
WKI		 1217static int link_request_set_neighbors(Link *link) {
1218 Neighbor *neighbor;
1219 int r;
1220
1221 assert(link);
1222 assert(link->network);
1223 assert(link->state != _LINK_STATE_INVALID);
1224
2428613f 1225 link->neighbors_configured = false;
e4a71bf3
WKI		 1226
1227 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
1228 r = neighbor_configure(neighbor, link, NULL);
4ff296b0
YW		 1229 if (r < 0)
1230 return log_link_warning_errno(link, r, "Could not set neighbor: %m");
e4a71bf3
WKI		 1231 }
1232
1233 if (link->neighbor_messages == 0) {
1234 link->neighbors_configured = true;
1235 link_check_ready(link);
b425c3ae 1236 } else {
e4a71bf3 1237 log_link_debug(link, "Setting neighbors");
b425c3ae
YW		 1238 link_set_state(link, LINK_STATE_CONFIGURING);
1239 }
e4a71bf3
WKI		 1240
1241 return 0;
1242}
1243
e5526518
YW		 1244static int link_set_bridge_fdb(Link *link) {
1245 FdbEntry *fdb_entry;
1246 int r;
1247
1248 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1249 r = fdb_entry_configure(link, fdb_entry);
1250 if (r < 0)
1251 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
1252 }
1253
1254 return 0;
1255}
1256
1257static int static_address_ready_callback(Address *address) {
1258 Address *a;
e5526518
YW		 1259 Link *link;
1260
1261 assert(address);
1262 assert(address->link);
1263
1264 link = address->link;
1265
1266 if (!link->addresses_configured)
1267 return 0;
1268
90e74a66 1269 SET_FOREACH(a, link->static_addresses)
e5526518
YW		 1270 if (!address_is_ready(a)) {
1271 _cleanup_free_ char *str = NULL;
1272
1273 (void) in_addr_to_string(a->family, &a->in_addr, &str);
1274 log_link_debug(link, "an address %s/%u is not ready", strnull(str), a->prefixlen);
1275 return 0;
1276 }
1277
1278 /* This should not be called again */
90e74a66 1279 SET_FOREACH(a, link->static_addresses)
e5526518
YW		 1280 a->callback = NULL;
1281
1282 link->addresses_ready = true;
1283
1284 return link_request_set_routes(link);
1285}
1286
3650173f 1287static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1288 int r;
1289
4958aee4 1290 assert(rtnl);
f5be5601
TG		 1291 assert(m);
1292 assert(link);
1293 assert(link->ifname);
7715629e 1294 assert(link->address_messages > 0);
289e6774 1295 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1296 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1297
7715629e 1298 link->address_messages--;
f882c247 1299
5da8149f 1300 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1301 return 1;
1302
1c4baffc 1303 r = sd_netlink_message_get_errno(m);
4ff296b0 1304 if (r < 0 && r != -EEXIST) {
5ecb131d 1305 log_link_message_warning_errno(link, m, r, "Could not set address");
4ff296b0
YW		 1306 link_enter_failed(link);
1307 return 1;
1308 } else if (r >= 0)
1309 (void) manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1310
7715629e 1311 if (link->address_messages == 0) {
e5526518
YW		 1312 Address *a;
1313
6a7a4e4d 1314 log_link_debug(link, "Addresses set");
c42ff3a1 1315 link->addresses_configured = true;
e5526518
YW		 1316
1317 /* When all static addresses are already ready, then static_address_ready_callback()
1318 * will not be called automatically. So, call it here. */
1319 a = set_first(link->static_addresses);
1320 if (!a) {
1321 log_link_warning(link, "No static address is stored.");
1322 link_enter_failed(link);
1323 return 1;
1324 }
1325 if (!a->callback) {
1326 log_link_warning(link, "Address ready callback is not set.");
1327 link_enter_failed(link);
1328 return 1;
1329 }
1330 r = a->callback(a);
1331 if (r < 0)
1332 link_enter_failed(link);
dd3efc09 1333 }
f882c247
TG		 1334
1335 return 1;
1336}
1337
e5526518
YW		 1338static int static_address_configure(Address *address, Link *link, bool update) {
1339 Address *ret;
197e2809 1340 int r;
f6bb7ac5 1341
e5526518
YW		 1342 assert(address);
1343 assert(link);
1344
1345 r = address_configure(address, link, address_handler, update, &ret);
1346 if (r < 0)
1347 return log_link_warning_errno(link, r, "Could not configure static address: %m");
1348
1349 link->address_messages++;
1350
1351 r = set_ensure_put(&link->static_addresses, &address_hash_ops, ret);
1352 if (r < 0)
1353 return log_link_warning_errno(link, r, "Failed to store static address: %m");
1354
1355 ret->callback = static_address_ready_callback;
f6bb7ac5 1356
197e2809 1357 return 0;
f6bb7ac5
TJ		 1358}
1359
289e6774 1360static int link_request_set_addresses(Link *link) {
95b74ef6 1361 AddressLabel *label;
a6cc569e 1362 Address *ad;
bd6379ec 1363 Prefix *p;
f882c247
TG		 1364 int r;
1365
1366 assert(link);
1367 assert(link->network);
f5be5601 1368 assert(link->state != _LINK_STATE_INVALID);
f882c247 1369
9b966cee
YW		 1370 if (link->address_remove_messages != 0) {
1371 log_link_debug(link, "Removing old addresses, new addresses will be configured later.");
1372 link->request_static_addresses = true;
1373 return 0;
1374 }
1375
2428613f 1376 /* Reset all *_configured flags we are configuring. */
9b966cee 1377 link->request_static_addresses = false;
2428613f 1378 link->addresses_configured = false;
6aa5773b 1379 link->addresses_ready = false;
2428613f
YW		 1380 link->neighbors_configured = false;
1381 link->static_routes_configured = false;
c16c7808 1382 link->static_nexthops_configured = false;
2428613f
YW		 1383 link->routing_policy_rules_configured = false;
1384
f6bb7ac5
TJ		 1385 r = link_set_bridge_fdb(link);
1386 if (r < 0)
1387 return r;
1388
f3ef324d
YW		 1389 r = link_request_set_neighbors(link);
1390 if (r < 0)
1391 return r;
e4a71bf3 1392
3d3d4255 1393 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1394 bool update;
1395
6f5d73ab
YW		 1396 if (ad->family == AF_INET6 && !in_addr_is_null(ad->family, &ad->in_addr_peer))
1397 update = address_get(link, ad->family, &ad->in_addr_peer, ad->prefixlen, NULL) > 0;
1398 else
1399 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
a47a6dae 1400
e5526518 1401 r = static_address_configure(ad, link, update);
4ff296b0 1402 if (r < 0)
e5526518 1403 return r;
95b74ef6
SS		 1404 }
1405
61c0ef4f 1406 if (link->network->router_prefix_delegation & RADV_PREFIX_DELEGATION_STATIC)
bd6379ec
SS		 1407 LIST_FOREACH(prefixes, p, link->network->static_prefixes) {
1408 _cleanup_(address_freep) Address *address = NULL;
1409
1410 if (!p->assign)
1411 continue;
1412
1413 r = address_new(&address);
1414 if (r < 0)
e5526518 1415 return log_oom();
bd6379ec
SS		 1416
1417 r = sd_radv_prefix_get_prefix(p->radv_prefix, &address->in_addr.in6, &address->prefixlen);
1418 if (r < 0)
e5526518 1419 return log_link_warning_errno(link, r, "Could not get RA prefix: %m");
bd6379ec
SS		 1420
1421 r = generate_ipv6_eui_64_address(link, &address->in_addr.in6);
1422 if (r < 0)
e5526518 1423 return log_link_warning_errno(link, r, "Could not generate EUI64 address: %m");
bd6379ec
SS		 1424
1425 address->family = AF_INET6;
e5526518 1426 r = static_address_configure(address, link, true);
bd6379ec 1427 if (r < 0)
e5526518 1428 return r;
bd6379ec
SS		 1429 }
1430
95b74ef6 1431 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1432 r = address_label_configure(label, link, NULL, false);
4ff296b0
YW		 1433 if (r < 0)
1434 return log_link_warning_errno(link, r, "Could not set address label: %m");
f5be5601 1435
7715629e 1436 link->address_label_messages++;
f882c247
TG		 1437 }
1438
e5526518 1439 /* now that we can figure out a default address for the dhcp server, start it */
708c425d 1440 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
8fcf1d61 1441 r = dhcp4_server_configure(link);
4ff296b0 1442 if (r < 0)
d4cdbea5 1443 return r;
6a7a4e4d 1444 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1445 }
1446
c42ff3a1
WKI		 1447 if (link->address_messages == 0) {
1448 link->addresses_configured = true;
e5526518
YW		 1449 link->addresses_ready = true;
1450 r = link_request_set_routes(link);
1451 if (r < 0)
1452 return r;
b425c3ae 1453 } else {
6a7a4e4d 1454 log_link_debug(link, "Setting addresses");
b425c3ae
YW		 1455 link_set_state(link, LINK_STATE_CONFIGURING);
1456 }
431ca2ce 1457
f882c247
TG		 1458 return 0;
1459}
1460
13b498f9 1461static int link_set_bridge_vlan(Link *link) {
86e2be7b 1462 int r;
13b498f9
TJ		 1463
1464 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1465 if (r < 0)
1466 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1467
1468 return r;
1469}
1470
a60a720c 1471static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1472 int r;
1473
1474 if (!link_proxy_arp_enabled(link))
1475 return 0;
1476
62e021a9 1477 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1478 if (r < 0)
1479 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1480
1481 return 0;
1482}
1483
3a390124 1484static int link_configure_continue(Link *link);
55dc8c4a 1485
302a796f 1486static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1487 int r;
1488
1489 assert(m);
1490 assert(link);
1491 assert(link->ifname);
1492
55dc8c4a
YW		 1493 link->setting_mtu = false;
1494
5da8149f 1495 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1496 return 1;
1497
1c4baffc 1498 r = sd_netlink_message_get_errno(m);
4ff296b0 1499 if (r < 0)
5ecb131d 1500 log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring");
4ff296b0
YW		 1501 else
1502 log_link_debug(link, "Setting MTU done.");
55dc8c4a 1503
4ff296b0 1504 if (link->state == LINK_STATE_INITIALIZED) {
3a390124 1505 r = link_configure_continue(link);
4ff296b0
YW		 1506 if (r < 0)
1507 link_enter_failed(link);
1508 }
4f882b2a
TG		 1509
1510 return 1;
1511}
1512
933c70a0 1513int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1514 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1515 int r;
1516
1517 assert(link);
1518 assert(link->manager);
1519 assert(link->manager->rtnl);
1520
40288ece
YW		 1521 if (mtu == 0 || link->setting_mtu)
1522 return 0;
1523
933c70a0 1524 if (link->mtu == mtu)
ee493106
YW		 1525 return 0;
1526
6a7a4e4d 1527 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1528
6a7a4e4d
LP		 1529 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1530 if (r < 0)
1531 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1532
44b598a1 1533 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1534 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1535 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1536
1537 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
d236718c 1538 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes");
44b598a1 1539
72c2500b 1540 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1541 }
1542
1c4baffc 1543 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1544 if (r < 0)
1545 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1546
302a796f
YW		 1547 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1548 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1549 if (r < 0)
1550 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1551
ae941762 1552 link_ref(link);
1046bf9b 1553 link->setting_mtu = true;
b226d99b 1554
4f882b2a
TG		 1555 return 0;
1556}
1557
f6fcc1c2
YW		 1558static bool link_reduces_vlan_mtu(Link *link) {
1559 /* See netif_reduces_vlan_mtu() in kernel. */
1560 return streq_ptr(link->kind, "macsec");
1561}
1562
1563static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1564 uint32_t mtu = 0;
1565 NetDev *dev;
f6fcc1c2 1566
90e74a66 1567 HASHMAP_FOREACH(dev, link->network->stacked_netdevs)
f6fcc1c2
YW		 1568 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1569 /* See vlan_dev_change_mtu() in kernel. */
1570 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1571
1572 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1573 /* See macvlan_change_mtu() in kernel. */
1574 mtu = dev->mtu;
1575
1576 return mtu;
1577}
1578
1579static int link_configure_mtu(Link *link) {
1580 uint32_t mtu;
1581
1582 assert(link);
1583 assert(link->network);
1584
1585 if (link->network->mtu > 0)
1586 return link_set_mtu(link, link->network->mtu);
1587
1588 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1589 if (link->mtu >= mtu)
1590 return 0;
1591
1592 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1593 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1594 link->mtu, mtu);
1595
1596 return link_set_mtu(link, mtu);
1597}
1598
302a796f 1599static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1600 int r;
1601
1602 assert(m);
1603 assert(link);
1604 assert(link->ifname);
1605
1606 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1607 return 1;
1608
1609 r = sd_netlink_message_get_errno(m);
1610 if (r < 0)
5ecb131d 1611 log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring");
99d2baa2
SS		 1612
1613 return 1;
1614}
1615
1616static int link_set_flags(Link *link) {
1617 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1618 unsigned ifi_change = 0;
1619 unsigned ifi_flags = 0;
1620 int r;
1621
1622 assert(link);
1623 assert(link->manager);
1624 assert(link->manager->rtnl);
1625
1626 if (link->flags & IFF_LOOPBACK)
1627 return 0;
1628
1629 if (!link->network)
1630 return 0;
1631
866e6b7a 1632 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1633 return 0;
1634
1635 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1636 if (r < 0)
1637 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1638
1639 if (link->network->arp >= 0) {
1640 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1641 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1642 }
1643
1644 if (link->network->multicast >= 0) {
1645 ifi_change |= IFF_MULTICAST;
1646 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1647 }
1648
866e6b7a
SS		 1649 if (link->network->allmulticast >= 0) {
1650 ifi_change |= IFF_ALLMULTI;
1651 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1652 }
1653
99d2baa2
SS		 1654 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1655 if (r < 0)
1656 return log_link_error_errno(link, r, "Could not set link flags: %m");
1657
302a796f
YW		 1658 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1659 link_netlink_destroy_callback, link);
99d2baa2
SS		 1660 if (r < 0)
1661 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1662
1663 link_ref(link);
1664
1665 return 0;
1666}
1667
e7ab854c
TG		 1668static int link_acquire_ipv6_conf(Link *link) {
1669 int r;
1670
1671 assert(link);
1672
e7ab854c 1673 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1674 assert(link->ndisc);
e7ab854c
TG		 1675
1676 log_link_debug(link, "Discovering IPv6 routers");
1677
1e7a0e21 1678 r = sd_ndisc_start(link->ndisc);
63348d13 1679 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1680 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1681 }
1682
7465dd22
PF		 1683 if (link_radv_enabled(link)) {
1684 assert(link->radv);
1685 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1686
1687 log_link_debug(link, "Starting IPv6 Router Advertisements");
1688
fd3ef936
YW		 1689 r = radv_emit_dns(link);
1690 if (r < 0)
1691 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
1692
7465dd22
PF		 1693 r = sd_radv_start(link->radv);
1694 if (r < 0 && r != -EBUSY)
1695 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1696 }
1697
838d39af
SS		 1698 if (link_dhcp6_enabled(link) && IN_SET(link->network->dhcp6_without_ra,
1699 DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST,
1700 DHCP6_CLIENT_START_MODE_SOLICIT)) {
cd305af1
SS		 1701 assert(link->dhcp6_client);
1702 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1703
838d39af 1704 r = dhcp6_request_address(link, link->network->dhcp6_without_ra == DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST);
cd305af1 1705 if (r < 0 && r != -EBUSY)
1633c457 1706 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
cd305af1
SS		 1707 else
1708 log_link_debug(link, "Acquiring DHCPv6 lease");
1709 }
1710
1633c457
YW		 1711 r = dhcp6_request_prefix_delegation(link);
1712 if (r < 0)
1713 return log_link_warning_errno(link, r, "Failed to request DHCPv6 prefix delegation: %m");
10752343 1714
e7ab854c
TG		 1715 return 0;
1716}
1717
6fc25497 1718static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1719 int r;
1720
1721 assert(link);
ff254138
TG		 1722 assert(link->manager);
1723 assert(link->manager->event);
1724
910feb78 1725 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1726 assert(link->ipv4ll);
ff254138 1727
6a7a4e4d 1728 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1729
1730 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1731 if (r < 0)
1732 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1733 }
1734
78c958f8 1735 if (link_dhcp4_enabled(link)) {
eb34d4af 1736 assert(link->dhcp_client);
ff254138 1737
6a7a4e4d 1738 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1739
5c1d3fc9 1740 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1741 if (r < 0)
1742 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1743 }
ff254138 1744
6fc25497
SS		 1745 return 0;
1746}
1747
1748static int link_acquire_conf(Link *link) {
1749 int r;
1750
1751 assert(link);
1752
1753 r = link_acquire_ipv4_conf(link);
1754 if (r < 0)
1755 return r;
1756
3f7cc080 1757 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1758 r = link_acquire_ipv6_conf(link);
1759 if (r < 0)
1760 return r;
1761 }
1762
7272b25e
LP		 1763 if (link_lldp_emit_enabled(link)) {
1764 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1765 if (r < 0)
1766 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1767 }
1768
ff254138
TG		 1769 return 0;
1770}
1771
a61bb41c 1772bool link_has_carrier(Link *link) {
deb2e523
TG		 1773 /* see Documentation/networking/operstates.txt in the kernel sources */
1774
a61bb41c 1775 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1776 return true;
1777
a61bb41c 1778 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1779 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1780 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1781 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1782 return true;
1783
1784 return false;
1785}
1786
0e2fdb83
SS		 1787static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1788 int r;
1789
1790 assert(link);
1791
9524014e
DS		 1792 link->setting_genmode = false;
1793
0e2fdb83
SS		 1794 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1795 return 1;
1796
1797 r = sd_netlink_message_get_errno(m);
1798 if (r < 0)
5ecb131d 1799 log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring");
9524014e
DS		 1800 else
1801 log_link_debug(link, "Setting address genmode done.");
1802
1803 if (link->state == LINK_STATE_INITIALIZED) {
1804 r = link_configure_continue(link);
1805 if (r < 0)
1806 link_enter_failed(link);
1807 }
0e2fdb83
SS		 1808
1809 return 1;
1810}
1811
1812static int link_configure_addrgen_mode(Link *link) {
1813 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1814 uint8_t ipv6ll_mode;
1815 int r;
1816
1817 assert(link);
1818 assert(link->network);
1819 assert(link->manager);
1820 assert(link->manager->rtnl);
1821
9524014e 1822 if (!socket_ipv6_is_supported() || link->setting_genmode)
9f6e82e6
YW		 1823 return 0;
1824
0e2fdb83
SS		 1825 log_link_debug(link, "Setting address genmode for link");
1826
1827 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1828 if (r < 0)
1829 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1830
1831 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1832 if (r < 0)
1833 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1834
1835 r = sd_netlink_message_open_container(req, AF_INET6);
1836 if (r < 0)
1837 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1838
1839 if (!link_ipv6ll_enabled(link))
1840 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
6f6296b9 1841 else if (link->network->ipv6ll_address_gen_mode < 0) {
a6f1848a
SS		 1842 r = sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL);
1843 if (r < 0) {
1844 /* The file may not exist. And even if it exists, when stable_secret is unset,
1845 * reading the file fails with EIO. */
1846 log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret: %m");
1847
1848 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1849 } else
1850 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1851 } else
6f6296b9 1852 ipv6ll_mode = link->network->ipv6ll_address_gen_mode;
0e2fdb83
SS		 1853
1854 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1855 if (r < 0)
1856 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1857
1858 r = sd_netlink_message_close_container(req);
1859 if (r < 0)
1860 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1861
1862 r = sd_netlink_message_close_container(req);
1863 if (r < 0)
1864 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1865
1866 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1867 link_netlink_destroy_callback, link);
1868 if (r < 0)
1869 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1870
1871 link_ref(link);
9524014e 1872 link->setting_genmode = true;
0e2fdb83
SS		 1873
1874 return 0;
1875}
1876
302a796f 1877static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1878 int r;
1879
1746cf2a
TG		 1880 assert(link);
1881
5da8149f 1882 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1883 return 1;
1884
1c4baffc 1885 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1886 if (r < 0)
26d6b214 1887 /* we warn but don't fail the link, as it may be brought up later */
5ecb131d 1888 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
45ad2c13 1889
f882c247
TG		 1890 return 1;
1891}
1892
1cc84f3b 1893static int link_up(Link *link) {
4afd3348 1894 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1895 int r;
1896
f882c247 1897 assert(link);
c106cc36 1898 assert(link->network);
f882c247
TG		 1899 assert(link->manager);
1900 assert(link->manager->rtnl);
1901
6a7a4e4d 1902 log_link_debug(link, "Bringing link up");
449f7554 1903
6a7a4e4d
LP		 1904 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1905 if (r < 0)
1906 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1907
2b2d8603 1908 /* set it free if not enslaved with networkd */
6cb955c6 1909 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1910 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1911 if (r < 0)
1912 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1913 }
1914
5d4795f3 1915 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1916 if (r < 0)
1917 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1918
c106cc36 1919 if (link->network->mac) {
1c4baffc 1920 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1921 if (r < 0)
1922 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1923 }
1924
302a796f
YW		 1925 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1926 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1927 if (r < 0)
1928 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1929
b226d99b
TG		 1930 link_ref(link);
1931
f882c247
TG		 1932 return 0;
1933}
1934
302a796f 1935static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1936 int r;
1937
1938 assert(link);
1939
1940 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1941 return 1;
1942
1c4baffc 1943 r = sd_netlink_message_get_errno(m);
0d4ad91d 1944 if (r < 0)
5ecb131d 1945 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
0d4ad91d
AR		 1946
1947 return 1;
1948}
1949
8e54db83 1950int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1951 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1952 int r;
1953
1954 assert(link);
1955 assert(link->manager);
1956 assert(link->manager->rtnl);
1957
6a7a4e4d 1958 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1959
1960 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1961 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1962 if (r < 0)
1963 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1964
1965 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1966 if (r < 0)
1967 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1968
8e54db83
YW		 1969 r = netlink_call_async(link->manager->rtnl, NULL, req,
1970 callback ?: link_down_handler,
302a796f 1971 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1972 if (r < 0)
1973 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1974
1975 link_ref(link);
1976
1977 return 0;
1978}
1979
89fe6535
SS		 1980static int link_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1981 int r;
1982
1983 assert(link);
1984
1985 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1986 return 1;
1987
1988 r = sd_netlink_message_get_errno(m);
1989 if (r < 0)
1990 log_link_message_warning_errno(link, m, r, "Could not set group for the interface");
1991
1992 return 1;
1993}
1994
1995static int link_set_group(Link *link) {
1996 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1997 int r;
1998
1999 assert(link);
2000 assert(link->network);
2001 assert(link->manager);
2002 assert(link->manager->rtnl);
2003
2004 if (link->network->group <= 0)
2005 return 0;
2006
2007 log_link_debug(link, "Setting group");
2008
2009 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
2010 if (r < 0)
2011 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
2012
2013 r = sd_netlink_message_append_u32(req, IFLA_GROUP, link->network->group);
2014 if (r < 0)
2015 return log_link_error_errno(link, r, "Could not set link group: %m");
2016
2017 r = netlink_call_async(link->manager->rtnl, NULL, req, link_group_handler,
2018 link_netlink_destroy_callback, link);
2019 if (r < 0)
2020 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
2021
2022 link_ref(link);
2023
2024 return 0;
2025}
2026
0d4ad91d
AR		 2027static int link_handle_bound_to_list(Link *link) {
2028 Link *l;
0d4ad91d
AR		 2029 int r;
2030 bool required_up = false;
2031 bool link_is_up = false;
2032
2033 assert(link);
2034
2035 if (hashmap_isempty(link->bound_to_links))
2036 return 0;
2037
2038 if (link->flags & IFF_UP)
2039 link_is_up = true;
2040
90e74a66 2041 HASHMAP_FOREACH (l, link->bound_to_links)
0d4ad91d
AR		 2042 if (link_has_carrier(l)) {
2043 required_up = true;
2044 break;
2045 }
2046
2047 if (!required_up && link_is_up) {
8e54db83 2048 r = link_down(link, NULL);
0d4ad91d
AR		 2049 if (r < 0)
2050 return r;
2051 } else if (required_up && !link_is_up) {
2052 r = link_up(link);
2053 if (r < 0)
2054 return r;
2055 }
2056
2057 return 0;
2058}
2059
2060static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 2061 Link *l;
2062 int r;
2063
2064 assert(link);
2065
2066 if (hashmap_isempty(link->bound_by_links))
2067 return 0;
2068
90e74a66 2069 HASHMAP_FOREACH (l, link->bound_by_links) {
0d4ad91d
AR		 2070 r = link_handle_bound_to_list(l);
2071 if (r < 0)
2072 return r;
2073 }
2074
2075 return 0;
2076}
2077
2078static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
2079 int r;
2080
2081 assert(link);
2082 assert(carrier);
2083
2084 if (link == carrier)
2085 return 0;
2086
2087 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
2088 return 0;
2089
2090 r = hashmap_ensure_allocated(h, NULL);
2091 if (r < 0)
2092 return r;
2093
2094 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
2095 if (r < 0)
2096 return r;
2097
2098 return 0;
2099}
2100
2101static int link_new_bound_by_list(Link *link) {
2102 Manager *m;
2103 Link *carrier;
0d4ad91d
AR		 2104 int r;
2105 bool list_updated = false;
2106
2107 assert(link);
2108 assert(link->manager);
2109
2110 m = link->manager;
2111
90e74a66 2112 HASHMAP_FOREACH(carrier, m->links) {
0d4ad91d
AR		 2113 if (!carrier->network)
2114 continue;
2115
2116 if (strv_isempty(carrier->network->bind_carrier))
2117 continue;
2118
191a3f16 2119 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 2120 r = link_put_carrier(link, carrier, &link->bound_by_links);
2121 if (r < 0)
2122 return r;
2123
2124 list_updated = true;
2125 }
2126 }
2127
2128 if (list_updated)
84de38c5 2129 link_dirty(link);
0d4ad91d 2130
90e74a66 2131 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 2132 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2133 if (r < 0)
2134 return r;
2135
84de38c5 2136 link_dirty(carrier);
0d4ad91d
AR		 2137 }
2138
2139 return 0;
2140}
2141
2142static int link_new_bound_to_list(Link *link) {
2143 Manager *m;
2144 Link *carrier;
0d4ad91d
AR		 2145 int r;
2146 bool list_updated = false;
2147
2148 assert(link);
2149 assert(link->manager);
2150
2151 if (!link->network)
2152 return 0;
2153
2154 if (strv_isempty(link->network->bind_carrier))
2155 return 0;
2156
2157 m = link->manager;
2158
90e74a66 2159 HASHMAP_FOREACH (carrier, m->links) {
191a3f16 2160 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 2161 r = link_put_carrier(link, carrier, &link->bound_to_links);
2162 if (r < 0)
2163 return r;
2164
2165 list_updated = true;
2166 }
2167 }
2168
2169 if (list_updated)
84de38c5 2170 link_dirty(link);
0d4ad91d 2171
90e74a66 2172 HASHMAP_FOREACH (carrier, link->bound_to_links) {
0d4ad91d
AR		 2173 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2174 if (r < 0)
2175 return r;
2176
84de38c5 2177 link_dirty(carrier);
0d4ad91d
AR		 2178 }
2179
2180 return 0;
2181}
2182
2183static int link_new_carrier_maps(Link *link) {
2184 int r;
2185
2186 r = link_new_bound_by_list(link);
2187 if (r < 0)
2188 return r;
2189
2190 r = link_handle_bound_by_list(link);
2191 if (r < 0)
2192 return r;
2193
2194 r = link_new_bound_to_list(link);
2195 if (r < 0)
2196 return r;
2197
2198 r = link_handle_bound_to_list(link);
2199 if (r < 0)
2200 return r;
2201
2202 return 0;
2203}
2204
2205static void link_free_bound_to_list(Link *link) {
2206 Link *bound_to;
0d4ad91d 2207
90e74a66 2208 HASHMAP_FOREACH (bound_to, link->bound_to_links) {
0d4ad91d
AR		 2209 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2210
2211 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2212 link_dirty(bound_to);
0d4ad91d
AR		 2213 }
2214
2215 return;
2216}
2217
2218static void link_free_bound_by_list(Link *link) {
2219 Link *bound_by;
0d4ad91d 2220
90e74a66 2221 HASHMAP_FOREACH (bound_by, link->bound_by_links) {
0d4ad91d
AR		 2222 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2223
2224 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2225 link_dirty(bound_by);
0d4ad91d
AR		 2226 link_handle_bound_to_list(bound_by);
2227 }
2228 }
2229
2230 return;
2231}
2232
2233static void link_free_carrier_maps(Link *link) {
2234 bool list_updated = false;
2235
2236 assert(link);
2237
2238 if (!hashmap_isempty(link->bound_to_links)) {
2239 link_free_bound_to_list(link);
2240 list_updated = true;
2241 }
2242
2243 if (!hashmap_isempty(link->bound_by_links)) {
2244 link_free_bound_by_list(link);
2245 list_updated = true;
2246 }
2247
2248 if (list_updated)
84de38c5 2249 link_dirty(link);
0d4ad91d
AR		 2250
2251 return;
2252}
2253
5f707e12
YW		 2254static int link_append_to_master(Link *link, NetDev *netdev) {
2255 Link *master;
2256 int r;
2257
2258 assert(link);
2259 assert(netdev);
2260
2261 r = link_get(link->manager, netdev->ifindex, &master);
2262 if (r < 0)
2263 return r;
2264
de7fef4b 2265 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 2266 if (r <= 0)
5f707e12
YW		 2267 return r;
2268
2269 link_ref(link);
2270 return 0;
2271}
2272
2273static void link_drop_from_master(Link *link, NetDev *netdev) {
2274 Link *master;
2275
2276 assert(link);
2277
2278 if (!link->manager || !netdev)
2279 return;
2280
2281 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2282 return;
2283
2284 link_unref(set_remove(master->slaves, link));
2285}
2286
2287static void link_detach_from_manager(Link *link) {
2288 if (!link || !link->manager)
2289 return;
2290
2291 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2292 link_clean(link);
2293
2294 /* The following must be called at last. */
2295 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2296 link_unref(link);
2297}
2298
0d4ad91d
AR		 2299void link_drop(Link *link) {
2300 if (!link || link->state == LINK_STATE_LINGER)
2301 return;
2302
2303 link_set_state(link, LINK_STATE_LINGER);
2304
2305 link_free_carrier_maps(link);
2306
5f707e12
YW		 2307 if (link->network) {
2308 link_drop_from_master(link, link->network->bridge);
2309 link_drop_from_master(link, link->network->bond);
2310 }
2311
6a7a4e4d 2312 log_link_debug(link, "Link removed");
0d4ad91d 2313
db2f8a2e 2314 (void) unlink(link->state_file);
c4397d94 2315 link_detach_from_manager(link);
0d4ad91d
AR		 2316}
2317
3f265037 2318static int link_joined(Link *link) {
f882c247
TG		 2319 int r;
2320
ef1ba606 2321 assert(link);
f5be5601 2322 assert(link->network);
dd3efc09 2323
0d4ad91d
AR		 2324 if (!hashmap_isempty(link->bound_to_links)) {
2325 r = link_handle_bound_to_list(link);
2326 if (r < 0)
2327 return r;
2328 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2329 r = link_up(link);
2330 if (r < 0) {
2331 link_enter_failed(link);
2332 return r;
2333 }
ef1ba606 2334 }
f882c247 2335
9ed794a3 2336 if (link->network->bridge) {
e1853b00 2337 r = link_set_bridge(link);
6a7a4e4d
LP		 2338 if (r < 0)
2339 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 2340
2341 r = link_append_to_master(link, link->network->bridge);
2342 if (r < 0)
2343 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 2344 }
2345
eb64b435 2346 if (link->network->bond) {
7fcee284 2347 r = link_set_bond(link);
eb64b435
SS		 2348 if (r < 0)
2349 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2350
45e11abf 2351 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2352 if (r < 0)
2353 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2354 }
2355
ffff9abe
TJ		 2356 if (link->network->use_br_vlan &&
2357 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2358 r = link_set_bridge_vlan(link);
2359 if (r < 0)
2360 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2361 }
2362
c1835a42
RM		 2363 /* Skip setting up addresses until it gets carrier,
2364 or it would try to set addresses twice,
2365 which is bad for non-idempotent steps. */
dad2d78e 2366 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2367 return 0;
2368
b425c3ae 2369 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 2370 return link_request_set_addresses(link);
02b59d57
TG		 2371}
2372
302a796f 2373static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2374 int r;
2375
1746cf2a 2376 assert(link);
ef1ba606 2377 assert(link->network);
34bf3c00 2378 assert(link->enslaving > 0);
02b59d57 2379
313cefa1 2380 link->enslaving--;
52433f6b 2381
5da8149f 2382 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2383 return 1;
2384
1c4baffc 2385 r = sd_netlink_message_get_errno(m);
856f962c 2386 if (r < 0 && r != -EEXIST) {
5ecb131d 2387 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG		 2388 link_enter_failed(link);
2389 return 1;
4ff296b0
YW		 2390 }
2391
2392 log_link_debug(link, "Joined netdev");
02b59d57 2393
34bf3c00 2394 if (link->enslaving == 0) {
4ff296b0
YW		 2395 r = link_joined(link);
2396 if (r < 0)
2397 link_enter_failed(link);
34bf3c00 2398 }
02b59d57
TG		 2399
2400 return 1;
2401}
2402
3f265037 2403static int link_enter_join_netdev(Link *link) {
6a0a2f86 2404 NetDev *netdev;
02b59d57
TG		 2405 int r;
2406
2407 assert(link);
2408 assert(link->network);
bd08ce56 2409 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2410
289e6774 2411 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2412
84de38c5 2413 link_dirty(link);
34bf3c00 2414 link->enslaving = 0;
02b59d57 2415
d9c67ea1 2416 if (link->network->bond) {
cbff7170
TJ		 2417 if (link->network->bond->state == NETDEV_STATE_READY &&
2418 link->network->bond->ifindex == link->master_ifindex)
2419 return link_joined(link);
2420
f2341e0a
LP		 2421 log_struct(LOG_DEBUG,
2422 LOG_LINK_INTERFACE(link),
2423 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2424 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2425
34bf3c00
YW		 2426 link->enslaving++;
2427
f2341e0a 2428 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2429 if (r < 0) {
f2341e0a
LP		 2430 log_struct_errno(LOG_WARNING, r,
2431 LOG_LINK_INTERFACE(link),
2432 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2433 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2434 link_enter_failed(link);
2435 return r;
2436 }
0ad6148e
MO		 2437 }
2438
d9c67ea1 2439 if (link->network->bridge) {
f2341e0a
LP		 2440 log_struct(LOG_DEBUG,
2441 LOG_LINK_INTERFACE(link),
2442 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2443 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2444
34bf3c00
YW		 2445 link->enslaving++;
2446
f2341e0a 2447 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2448 if (r < 0) {
f2341e0a
LP		 2449 log_struct_errno(LOG_WARNING, r,
2450 LOG_LINK_INTERFACE(link),
2451 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2452 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2453 link_enter_failed(link);
2454 return r;
2455 }
52433f6b
TG		 2456 }
2457
6cb955c6
AR		 2458 if (link->network->vrf) {
2459 log_struct(LOG_DEBUG,
2460 LOG_LINK_INTERFACE(link),
2461 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2462 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2463
34bf3c00
YW		 2464 link->enslaving++;
2465
6cb955c6
AR		 2466 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2467 if (r < 0) {
2468 log_struct_errno(LOG_WARNING, r,
2469 LOG_LINK_INTERFACE(link),
2470 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2471 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2472 link_enter_failed(link);
2473 return r;
2474 }
6cb955c6
AR		 2475 }
2476
90e74a66 2477 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7951dea2 2478
2b6db913
YW		 2479 if (netdev->ifindex > 0)
2480 /* Assume already enslaved. */
a63e5daa 2481 continue;
a63e5daa 2482
7033af49
YW		 2483 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2484 continue;
2485
f2341e0a
LP		 2486 log_struct(LOG_DEBUG,
2487 LOG_LINK_INTERFACE(link),
2488 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2489 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2490
34bf3c00
YW		 2491 link->enslaving++;
2492
f2341e0a 2493 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2494 if (r < 0) {
f2341e0a
LP		 2495 log_struct_errno(LOG_WARNING, r,
2496 LOG_LINK_INTERFACE(link),
2497 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2498 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2499 link_enter_failed(link);
2500 return r;
2501 }
326cb406
SS		 2502 }
2503
34bf3c00
YW		 2504 if (link->enslaving == 0)
2505 return link_joined(link);
2506
ef1ba606
TG		 2507 return 0;
2508}
2509
769d324c 2510static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2511 int r;
2512
765afd5c 2513 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2514 return 0;
2515
765afd5c
LP		 2516 /* We propagate the forwarding flag from one interface to the
2517 * global setting one way. This means: as long as at least one
2518 * interface was configured at any time that had IP forwarding
2519 * enabled the setting will stay on for good. We do this
2520 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2521 * somewhat in sync (see below). */
15dee3f0 2522
62e021a9 2523 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2524 if (r < 0)
765afd5c 2525 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2526
769d324c
LP		 2527 return 0;
2528}
2529
2530static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2531 int r;
2532
765afd5c 2533 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2534 return 0;
2535
61233823 2536 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2537 * packet forwarding setting: either packet forwarding is on
2538 * for all, or off for all. We hence don't bother with a
2539 * per-interface setting, but simply propagate the interface
2540 * flag, if it is set, to the global flag, one-way. Note that
2541 * while IPv4 would allow a per-interface flag, we expose the
2542 * same behaviour there and also propagate the setting from
2543 * one to all, to keep things simple (see above). */
15dee3f0 2544
62e021a9 2545 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2546 if (r < 0)
765afd5c 2547 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2548
2549 return 0;
2550}
2551
49092e22 2552static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2553 IPv6PrivacyExtensions s;
49092e22
SS		 2554 int r;
2555
1f0d9695 2556 s = link_ipv6_privacy_extensions(link);
66a6bd68 2557 if (s < 0)
49092e22
SS		 2558 return 0;
2559
62e021a9 2560 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2561 if (r < 0)
49092e22
SS		 2562 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2563
2564 return 0;
2565}
2566
4f2e437a 2567static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2568 int r;
2569
2570 /* Make this a NOP if IPv6 is not available */
2571 if (!socket_ipv6_is_supported())
2572 return 0;
2573
2574 if (link->flags & IFF_LOOPBACK)
2575 return 0;
2576
d68e2e59
LP		 2577 if (!link->network)
2578 return 0;
2579
62e021a9 2580 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2581 if (r < 0)
fe307276 2582 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2583
2584 return 0;
2585}
2586
8749cbcd 2587static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2588 int r;
2589
2590 /* Make this a NOP if IPv6 is not available */
2591 if (!socket_ipv6_is_supported())
2592 return 0;
2593
2594 if (link->flags & IFF_LOOPBACK)
2595 return 0;
2596
d68e2e59
LP		 2597 if (!link->network)
2598 return 0;
2599
8749cbcd
SS		 2600 if (link->network->ipv6_dad_transmits < 0)
2601 return 0;
2602
62e021a9 2603 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2604 if (r < 0)
8749cbcd 2605 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2606
2607 return 0;
2608}
2609
b69c3180 2610static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2611 int r;
2612
2613 /* Make this a NOP if IPv6 is not available */
2614 if (!socket_ipv6_is_supported())
2615 return 0;
2616
2617 if (link->flags & IFF_LOOPBACK)
2618 return 0;
2619
d68e2e59
LP		 2620 if (!link->network)
2621 return 0;
2622
b69c3180
SS		 2623 if (link->network->ipv6_hop_limit < 0)
2624 return 0;
2625
62e021a9 2626 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2627 if (r < 0)
b69c3180 2628 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2629
2630 return 0;
2631}
2632
11102cba 2633static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2634 int r;
2635
2636 /* Make this a NOP if IPv6 is not available */
2637 if (!socket_ipv6_is_supported())
2638 return 0;
2639
2640 if (link->flags & IFF_LOOPBACK)
2641 return 0;
2642
2643 if (link->network->ipv6_mtu == 0)
2644 return 0;
2645
d236718c
DS		 2646 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
2647 * on the interface. Bump up IPv6 MTU bytes to IPV6_MTU_MIN. */
2648 if (link->network->ipv6_mtu < IPV6_MIN_MTU) {
2649 log_link_notice(link, "Bumping IPv6 MTU to "STRINGIFY(IPV6_MIN_MTU)" byte minimum required");
2650 link->network->ipv6_mtu = IPV6_MIN_MTU;
2651 }
2652
62e021a9 2653 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
d236718c
DS		 2654 if (r < 0) {
2655 if (link->mtu < link->network->ipv6_mtu)
2656 log_link_warning(link, "Cannot set IPv6 MTU %"PRIu32" higher than device MTU %"PRIu32,
2657 link->network->ipv6_mtu, link->mtu);
2658 else
2659 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2660 }
2661
2662 link->ipv6_mtu_set = true;
11102cba
SS		 2663
2664 return 0;
2665}
2666
94d76d07
YW		 2667static int link_set_ipv4_accept_local(Link *link) {
2668 int r;
2669
2670 if (link->flags & IFF_LOOPBACK)
2671 return 0;
2672
2673 if (link->network->ipv4_accept_local < 0)
2674 return 0;
2675
2676 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "accept_local", link->network->ipv4_accept_local);
2677 if (r < 0)
2678 log_link_warning_errno(link, r, "Cannot set IPv4 accept_local flag for interface: %m");
2679
2680 return 0;
2681}
2682
30226d27
TJ		 2683static bool link_is_static_address_configured(Link *link, Address *address) {
2684 Address *net_address;
2685
2686 assert(link);
2687 assert(address);
2688
2689 if (!link->network)
2690 return false;
2691
2692 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2693 if (address_equal(net_address, address))
2694 return true;
6f5d73ab
YW		 2695 else if (address->family == AF_INET6 && net_address->family == AF_INET6 &&
2696 in_addr_equal(AF_INET6, &address->in_addr, &net_address->in_addr_peer) > 0)
2697 return true;
30226d27
TJ		 2698
2699 return false;
2700}
2701
d1bdafd2
WKI		 2702static bool link_is_neighbor_configured(Link *link, Neighbor *neighbor) {
2703 Neighbor *net_neighbor;
2704
2705 assert(link);
2706 assert(neighbor);
2707
2708 if (!link->network)
2709 return false;
2710
2711 LIST_FOREACH(neighbors, net_neighbor, link->network->neighbors)
2712 if (neighbor_equal(net_neighbor, neighbor))
2713 return true;
2714
2715 return false;
2716}
2717
7ecf0c3e
TJ		 2718static bool link_is_static_route_configured(Link *link, Route *route) {
2719 Route *net_route;
2720
2721 assert(link);
2722 assert(route);
2723
2724 if (!link->network)
2725 return false;
2726
2727 LIST_FOREACH(routes, net_route, link->network->static_routes)
2728 if (route_equal(net_route, route))
2729 return true;
2730
2731 return false;
2732}
2733
db51778f
YW		 2734static bool link_address_is_dynamic(Link *link, Address *address) {
2735 Route *route;
db51778f
YW		 2736
2737 assert(link);
2738 assert(address);
2739
2740 if (address->cinfo.ifa_prefered != CACHE_INFO_INFINITY_LIFE_TIME)
2741 return true;
2742
2743 /* Even when the address is leased from a DHCP server, networkd assign the address
2744 * without lifetime when KeepConfiguration=dhcp. So, let's check that we have
2745 * corresponding routes with RTPROT_DHCP. */
90e74a66 2746 SET_FOREACH(route, link->routes_foreign) {
db51778f
YW		 2747 if (route->protocol != RTPROT_DHCP)
2748 continue;
2749
2750 if (address->family != route->family)
2751 continue;
2752
2753 if (in_addr_equal(address->family, &address->in_addr, &route->prefsrc))
2754 return true;
2755 }
2756
2757 return false;
2758}
2759
0917a271
DS		 2760static int link_enumerate_ipv6_tentative_addresses(Link *link) {
2761 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
2762 sd_netlink_message *addr;
2763 int r;
2764
2765 assert(link);
2766 assert(link->manager);
2767 assert(link->manager->rtnl);
2768
2769 r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_GETADDR, 0, AF_INET6);
2770 if (r < 0)
2771 return r;
2772
2773 r = sd_netlink_call(link->manager->rtnl, req, 0, &reply);
2774 if (r < 0)
2775 return r;
2776
2777 for (addr = reply; addr; addr = sd_netlink_message_next(addr)) {
2778 unsigned char flags;
2779 int ifindex;
2780
2781 r = sd_rtnl_message_addr_get_ifindex(addr, &ifindex);
2782 if (r < 0) {
2783 log_link_warning_errno(link, r, "rtnl: invalid ifindex, ignoring: %m");
2784 continue;
2785 } else if (link->ifindex != ifindex)
2786 continue;
2787
2788 r = sd_rtnl_message_addr_get_flags(addr, &flags);
2789 if (r < 0) {
2790 log_link_warning_errno(link, r, "rtnl: received address message with invalid flags, ignoring: %m");
2791 continue;
2792 } else if (!(flags & IFA_F_TENTATIVE))
2793 continue;
2794
2795 log_link_debug(link, "Found tentative ipv6 link-local address");
2796 (void) manager_rtnl_process_address(link->manager->rtnl, addr, link->manager);
2797 }
2798
2799 return 0;
2800}
2801
5e5b137a
TG		 2802static int link_drop_foreign_config(Link *link) {
2803 Address *address;
d1bdafd2 2804 Neighbor *neighbor;
5e5b137a 2805 Route *route;
5e5b137a
TG		 2806 int r;
2807
0917a271
DS		 2808 /* The kernel doesn't notify us about tentative addresses;
2809 * so if ipv6ll is disabled, we need to enumerate them now so we can drop them below */
2810 if (!link_ipv6ll_enabled(link)) {
2811 r = link_enumerate_ipv6_tentative_addresses(link);
2812 if (r < 0)
2813 return r;
2814 }
2815
90e74a66 2816 SET_FOREACH(address, link->addresses_foreign) {
fe307276 2817 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2818 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
5e5b137a
TG		 2819 continue;
2820
db51778f 2821 if (link_address_is_dynamic(link, address)) {
b1b0b42e 2822 if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
db51778f 2823 continue;
b1b0b42e 2824 } else if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
db51778f
YW		 2825 continue;
2826
30226d27
TJ		 2827 if (link_is_static_address_configured(link, address)) {
2828 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2829 if (r < 0)
2830 return log_link_error_errno(link, r, "Failed to add address: %m");
2831 } else {
63ae0569 2832 r = address_remove(address, link, NULL);
30226d27
TJ		 2833 if (r < 0)
2834 return r;
2835 }
5e5b137a
TG		 2836 }
2837
90e74a66 2838 SET_FOREACH(neighbor, link->neighbors_foreign) {
d1bdafd2
WKI		 2839 if (link_is_neighbor_configured(link, neighbor)) {
2840 r = neighbor_add(link, neighbor->family, &neighbor->in_addr, &neighbor->lladdr, neighbor->lladdr_size, NULL);
2841 if (r < 0)
2842 return r;
2843 } else {
2844 r = neighbor_remove(neighbor, link, NULL);
2845 if (r < 0)
2846 return r;
2847 }
2848 }
2849
90e74a66 2850 SET_FOREACH(route, link->routes_foreign) {
fe307276 2851 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2852 if (route->protocol == RTPROT_KERNEL)
2853 continue;
2854
bd7d6cec
YW		 2855 /* do not touch multicast route added by kernel */
2856 /* FIXME: Why the kernel adds this route with protocol RTPROT_BOOT??? We need to investigate that.
2857 * https://tools.ietf.org/html/rfc4862#section-5.4 may explain why. */
2858 if (route->protocol == RTPROT_BOOT &&
2859 route->family == AF_INET6 &&
2860 route->dst_prefixlen == 8 &&
2861 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 }}} }))
2862 continue;
2863
b1b0b42e 2864 if (route->protocol == RTPROT_STATIC && link->network &&
db51778f
YW		 2865 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2866 continue;
2867
b1b0b42e 2868 if (route->protocol == RTPROT_DHCP && link->network &&
db51778f
YW		 2869 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2870 continue;
2871
7ecf0c3e 2872 if (link_is_static_route_configured(link, route)) {
f1368755 2873 r = route_add(link, route, NULL);
7ecf0c3e
TJ		 2874 if (r < 0)
2875 return r;
2876 } else {
4645ad47 2877 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2878 if (r < 0)
2879 return r;
2880 }
5e5b137a
TG		 2881 }
2882
2883 return 0;
2884}
2885
9b966cee
YW		 2886static int remove_static_address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2887 int r;
2888
2889 assert(m);
2890 assert(link);
2891 assert(link->ifname);
2892 assert(link->address_remove_messages > 0);
2893
2894 link->address_remove_messages--;
2895
2896 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2897 return 1;
2898
2899 r = sd_netlink_message_get_errno(m);
2900 if (r < 0 && r != -EADDRNOTAVAIL)
2901 log_link_message_warning_errno(link, m, r, "Could not drop address");
2902 else if (r >= 0)
2903 (void) manager_rtnl_process_address(rtnl, m, link->manager);
2904
2905 if (link->address_remove_messages == 0 && link->request_static_addresses) {
2906 link_set_state(link, LINK_STATE_CONFIGURING);
2907 r = link_request_set_addresses(link);
2908 if (r < 0)
2909 link_enter_failed(link);
2910 }
2911
2912 return 1;
2913}
2914
3104883d 2915static int link_drop_config(Link *link) {
410a7f15 2916 Address *address, *pool_address;
d1bdafd2 2917 Neighbor *neighbor;
3104883d 2918 Route *route;
3104883d
SS		 2919 int r;
2920
90e74a66 2921 SET_FOREACH(address, link->addresses) {
3104883d 2922 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2923 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
3104883d
SS		 2924 continue;
2925
9b966cee 2926 r = address_remove(address, link, remove_static_address_handler);
3104883d
SS		 2927 if (r < 0)
2928 return r;
410a7f15 2929
9b966cee
YW		 2930 link->address_remove_messages++;
2931
410a7f15 2932 /* If this address came from an address pool, clean up the pool */
b6766fb1 2933 LIST_FOREACH(addresses, pool_address, link->pool_addresses)
410a7f15
RM		 2934 if (address_equal(address, pool_address)) {
2935 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2936 address_free(pool_address);
2937 break;
2938 }
3104883d
SS		 2939 }
2940
90e74a66 2941 SET_FOREACH(neighbor, link->neighbors) {
d1bdafd2
WKI		 2942 r = neighbor_remove(neighbor, link, NULL);
2943 if (r < 0)
2944 return r;
2945 }
2946
90e74a66 2947 SET_FOREACH(route, link->routes) {
3104883d
SS		 2948 /* do not touch routes managed by the kernel */
2949 if (route->protocol == RTPROT_KERNEL)
2950 continue;
2951
4645ad47 2952 r = route_remove(route, link, NULL);
3104883d
SS		 2953 if (r < 0)
2954 return r;
2955 }
2956
c69305ff
LP		 2957 ndisc_flush(link);
2958
3104883d
SS		 2959 return 0;
2960}
2961
051e77ca
SS		 2962static int link_configure_ipv4_dad(Link *link) {
2963 Address *address;
2964 int r;
2965
2966 assert(link);
2967 assert(link->network);
2968
2969 LIST_FOREACH(addresses, address, link->network->static_addresses)
2970 if (address->family == AF_INET &&
2971 FLAGS_SET(address->duplicate_address_detection, ADDRESS_FAMILY_IPV4)) {
2972 r = configure_ipv4_duplicate_address_detection(link, address);
2973 if (r < 0)
2974 return log_link_error_errno(link, r, "Failed to configure IPv4ACD: %m");
2975 }
2976
2977 return 0;
2978}
2979
34658df2
YW		 2980static int link_configure_traffic_control(Link *link) {
2981 TrafficControl *tc;
02b59d57
TG		 2982 int r;
2983
34658df2
YW		 2984 link->tc_configured = false;
2985 link->tc_messages = 0;
4ecdcb07 2986
90e74a66 2987 ORDERED_HASHMAP_FOREACH(tc, link->network->tc_by_section) {
34658df2 2988 r = traffic_control_configure(link, tc);
4ecdcb07
YW		 2989 if (r < 0)
2990 return r;
2991 }
2992
34658df2
YW		 2993 if (link->tc_messages == 0)
2994 link->tc_configured = true;
4ecdcb07 2995 else
34658df2 2996 log_link_debug(link, "Configuring traffic control");
4ecdcb07
YW		 2997
2998 return 0;
2999}
3000
518cd6b5
SS		 3001static int link_configure_sr_iov(Link *link) {
3002 SRIOV *sr_iov;
518cd6b5
SS		 3003 int r;
3004
3005 link->sr_iov_configured = false;
3006 link->sr_iov_messages = 0;
3007
90e74a66 3008 ORDERED_HASHMAP_FOREACH(sr_iov, link->network->sr_iov_by_section) {
518cd6b5
SS		 3009 r = sr_iov_configure(link, sr_iov);
3010 if (r < 0)
3011 return r;
3012 }
3013
3014 if (link->sr_iov_messages == 0)
3015 link->sr_iov_configured = true;
3016 else
3017 log_link_debug(link, "Configuring SR-IOV");
3018
3019 return 0;
3020}
3021
4ecdcb07
YW		 3022static int link_configure(Link *link) {
3023 int r;
3024
ef1ba606 3025 assert(link);
b22d8a00 3026 assert(link->network);
bd08ce56 3027 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 3028
34658df2 3029 r = link_configure_traffic_control(link);
4ecdcb07
YW		 3030 if (r < 0)
3031 return r;
3032
518cd6b5
SS		 3033 r = link_configure_sr_iov(link);
3034 if (r < 0)
3035 return r;
3036
500b96eb 3037 if (link->iftype == ARPHRD_CAN)
93ea7750 3038 return link_configure_can(link);
92c918b0 3039
482efedc
SS		 3040 /* If IPv6 configured that is static IPv6 address and IPv6LL autoconfiguration is enabled
3041 * for this interface, then enable IPv6 */
57ad7607 3042 (void) link_update_ipv6_sysctl(link);
482efedc 3043
23d8b221
SS		 3044 r = link_set_proxy_arp(link);
3045 if (r < 0)
3046 return r;
3047
a0e5c15d
FK		 3048 r = ipv6_proxy_ndp_addresses_configure(link);
3049 if (r < 0)
3050 return r;
3051
769d324c
LP		 3052 r = link_set_ipv4_forward(link);
3053 if (r < 0)
3054 return r;
3055
3056 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 3057 if (r < 0)
3058 return r;
3059
49092e22
SS		 3060 r = link_set_ipv6_privacy_extensions(link);
3061 if (r < 0)
3062 return r;
3063
4f2e437a
SS		 3064 r = link_set_ipv6_accept_ra(link);
3065 if (r < 0)
3066 return r;
3067
8749cbcd
SS		 3068 r = link_set_ipv6_dad_transmits(link);
3069 if (r < 0)
3070 return r;
b69c3180
SS		 3071
3072 r = link_set_ipv6_hop_limit(link);
3073 if (r < 0)
3074 return r;
8749cbcd 3075
94d76d07
YW		 3076 r = link_set_ipv4_accept_local(link);
3077 if (r < 0)
3078 return r;
3079
99d2baa2
SS		 3080 r = link_set_flags(link);
3081 if (r < 0)
3082 return r;
3083
89fe6535
SS		 3084 r = link_set_group(link);
3085 if (r < 0)
3086 return r;
3087
910feb78 3088 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
b22d8a00 3089 r = ipv4ll_configure(link);
eb34d4af
TG		 3090 if (r < 0)
3091 return r;
3092 }
3093
78c958f8 3094 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 3095 r = dhcp4_set_promote_secondaries(link);
3096 if (r < 0)
3097 return r;
3098
3c9b8860 3099 r = dhcp4_configure(link);
eb34d4af
TG		 3100 if (r < 0)
3101 return r;
eb34d4af
TG		 3102 }
3103
78c958f8 3104 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 3105 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
3106 if (r < 0)
3107 return r;
3108
3109 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
3110 if (r < 0)
3111 return r;
dd43110f
TG		 3112 }
3113
62379e88
TG		 3114 if (link_dhcp6_enabled(link) ||
3115 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 3116 r = dhcp6_configure(link);
3117 if (r < 0)
3118 return r;
3119 }
3120
3121 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 3122 r = ndisc_configure(link);
4138fb2c
PF		 3123 if (r < 0)
3124 return r;
3125 }
3126
7465dd22
PF		 3127 if (link_radv_enabled(link)) {
3128 r = radv_configure(link);
3129 if (r < 0)
3130 return r;
3131 }
3132
8e1ad1ea 3133 if (link_lldp_rx_enabled(link)) {
7f853950 3134 r = link_lldp_rx_configure(link);
273eec24
LP		 3135 if (r < 0)
3136 return r;
ce43e484
SS		 3137 }
3138
f6fcc1c2 3139 r = link_configure_mtu(link);
40288ece
YW		 3140 if (r < 0)
3141 return r;
44b598a1 3142
9f6e82e6
YW		 3143 r = link_configure_addrgen_mode(link);
3144 if (r < 0)
3145 return r;
0e2fdb83 3146
051e77ca
SS		 3147 r = link_configure_ipv4_dad(link);
3148 if (r < 0)
3149 return r;
3150
3a390124
DS		 3151 return link_configure_continue(link);
3152}
3153
3154/* The configuration continues in this separate function, instead of
3155 * including this in the above link_configure() function, for two
3156 * reasons:
3157 * 1) some devices reset the link when the mtu is set, which caused
3158 * an infinite loop here in networkd; see:
3159 * https://github.com/systemd/systemd/issues/6593
3160 * https://github.com/systemd/systemd/issues/9831
3161 * 2) if ipv6ll is disabled, then bringing the interface up must be
3162 * delayed until after we get confirmation from the kernel that
3163 * the addr_gen_mode parameter has been set (via netlink), see:
3164 * https://github.com/systemd/systemd/issues/13882
3165 */
3166static int link_configure_continue(Link *link) {
55dc8c4a
YW		 3167 int r;
3168
3169 assert(link);
3170 assert(link->network);
bd08ce56 3171 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a 3172
9524014e 3173 if (link->setting_mtu || link->setting_genmode)
55dc8c4a
YW		 3174 return 0;
3175
4c649652
DS		 3176 /* Drop foreign config, but ignore loopback or critical devices.
3177 * We do not want to remove loopback address or addresses used for root NFS. */
3178 if (!(link->flags & IFF_LOOPBACK) &&
3179 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
3180 r = link_drop_foreign_config(link);
3181 if (r < 0)
3182 return r;
3183 }
3184
d236718c
DS		 3185 /* The kernel resets ipv6 mtu after changing device mtu;
3186 * we must set this here, after we've set device mtu */
3187 r = link_set_ipv6_mtu(link);
3188 if (r < 0)
3189 return r;
3190
dad2d78e 3191 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 3192 r = link_acquire_conf(link);
3193 if (r < 0)
3194 return r;
cc544d5f 3195 }
1e9be60b 3196
3f265037 3197 return link_enter_join_netdev(link);
505f8da7
TG		 3198}
3199
27dfc982
YW		 3200static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
3201 assert(duid);
3202
3203 if (duid->raw_data_len > 0)
3204 return 0;
3205
3206 if (duid->type != DUID_TYPE_UUID)
3207 return -EINVAL;
3208
3209 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
3210 duid->raw_data_len = sizeof(sd_id128_t);
3211
3212 return 1;
3213}
3214
3215int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
3216 Manager *manager = userdata;
3217 const sd_bus_error *e;
3218 const void *a;
3219 size_t sz;
3220 DUID *duid;
3221 Link *link;
3222 int r;
3223
3224 assert(m);
3225 assert(manager);
3226
3227 e = sd_bus_message_get_error(m);
3228 if (e) {
3229 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 3230 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 3231 e->message);
3232 goto configure;
3233 }
3234
3235 r = sd_bus_message_read_array(m, 'y', &a, &sz);
3236 if (r < 0)
3237 goto configure;
3238
3239 if (sz != sizeof(sd_id128_t)) {
ab4dd984 3240 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 3241 goto configure;
3242 }
3243
3244 memcpy(&manager->product_uuid, a, sz);
3245 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
3246 (void) duid_set_uuid(duid, manager->product_uuid);
3247
3248 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
3249
3250configure:
3251 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3dc2e7af
YW		 3252 link_unref(link);
3253
27dfc982
YW		 3254 r = link_configure(link);
3255 if (r < 0)
4ff296b0 3256 link_enter_failed(link);
27dfc982
YW		 3257 }
3258
3259 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
3260
3261 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
3262 * even if the method fails. */
3263 manager->has_product_uuid = true;
3264
3265 return 1;
3266}
3267
3268static bool link_requires_uuid(Link *link) {
3269 const DUID *duid;
3270
3271 assert(link);
3272 assert(link->manager);
3273 assert(link->network);
3274
3275 duid = link_get_duid(link);
3276 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
3277 return false;
3278
3279 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
3280 return true;
3281
3282 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
3283 return true;
3284
3285 return false;
3286}
3287
3288static int link_configure_duid(Link *link) {
3289 Manager *m;
3290 DUID *duid;
3291 int r;
3292
3293 assert(link);
3294 assert(link->manager);
3295 assert(link->network);
3296
3297 m = link->manager;
3298 duid = link_get_duid(link);
3299
3300 if (!link_requires_uuid(link))
3301 return 1;
3302
3303 if (m->has_product_uuid) {
3304 (void) duid_set_uuid(duid, m->product_uuid);
3305 return 1;
3306 }
3307
3308 if (!m->links_requesting_uuid) {
3309 r = manager_request_product_uuid(m, link);
3310 if (r < 0) {
3311 if (r == -ENOMEM)
3312 return r;
3313
ab4dd984
ZJS		 3314 log_link_warning_errno(link, r,
3315 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 3316 return 1;
3317 }
3318 } else {
3319 r = set_put(m->links_requesting_uuid, link);
3320 if (r < 0)
3321 return log_oom();
39dbd0c7
ZJS		 3322 if (r > 0)
3323 link_ref(link);
27dfc982
YW		 3324
3325 r = set_put(m->duids_requesting_uuid, duid);
3326 if (r < 0)
3327 return log_oom();
3328 }
3329
3330 return 0;
3331}
3332
572b21d9 3333static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
ad932b15
YW		 3334 Network *network;
3335 int r;
3336
572b21d9
YW		 3337 if (m) {
3338 _cleanup_strv_free_ char **s = NULL;
3339
3340 r = sd_netlink_message_get_errno(m);
3341 if (r < 0)
3342 return r;
3343
3344 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3345 if (r < 0 && r != -ENODATA)
3346 return r;
3347
3348 strv_free_and_replace(link->alternative_names, s);
3349 }
3350
c643bda5
YW		 3351 r = network_get(link->manager, link->iftype, link->sd_device,
3352 link->ifname, link->alternative_names, link->driver,
3353 &link->mac, &link->permanent_mac,
3354 link->wlan_iftype, link->ssid, &link->bssid, &network);
ad932b15
YW		 3355 if (r == -ENOENT) {
3356 link_enter_unmanaged(link);
3357 return 0;
3358 } else if (r == 0 && network->unmanaged) {
3359 link_enter_unmanaged(link);
3360 return 0;
3361 } else if (r < 0)
3362 return r;
3363
99b8517c 3364 if (link->network == network && !force)
ad932b15
YW		 3365 return 0;
3366
3367 log_link_info(link, "Re-configuring with %s", network->filename);
3368
3369 /* Dropping old .network file */
3370 r = link_stop_clients(link, false);
572b21d9 3371 if (r < 0)
ad932b15 3372 return r;
ad932b15
YW		 3373
3374 if (link_dhcp4_server_enabled(link))
3375 (void) sd_dhcp_server_stop(link->dhcp_server);
3376
3377 r = link_drop_config(link);
3378 if (r < 0)
3379 return r;
3380
2c7b826d 3381 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
ad932b15
YW		 3382 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
3383 r = link_drop_foreign_config(link);
3384 if (r < 0)
3385 return r;
3386 }
3387
3388 link_free_carrier_maps(link);
3389 link_free_engines(link);
3390 link->network = network_unref(link->network);
3391
3392 /* Then, apply new .network file */
3393 r = network_apply(network, link);
3394 if (r < 0)
3395 return r;
3396
3397 r = link_new_carrier_maps(link);
3398 if (r < 0)
3399 return r;
3400
3401 link_set_state(link, LINK_STATE_INITIALIZED);
8ae7b8a1 3402 link_dirty(link);
ad932b15
YW		 3403
3404 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3405 * link_configure() is called later asynchronously. */
3406 r = link_configure_duid(link);
3407 if (r <= 0)
3408 return r;
3409
3410 r = link_configure(link);
3411 if (r < 0)
3412 return r;
3413
3414 return 0;
3415}
3416
572b21d9
YW		 3417static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3418 int r;
3419
3420 r = link_reconfigure_internal(link, m, false);
3421 if (r < 0)
3422 link_enter_failed(link);
3423
3424 return 1;
3425}
3426
3427static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3428 int r;
3429
3430 r = link_reconfigure_internal(link, m, true);
3431 if (r < 0)
3432 link_enter_failed(link);
3433
3434 return 1;
3435}
3436
3437int link_reconfigure(Link *link, bool force) {
3438 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
3439 int r;
3440
2c0d7ed3
YW		 3441 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
3442 return 0;
3443
572b21d9
YW		 3444 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3445 link->ifindex);
3446 if (r < 0)
3447 return r;
3448
3449 r = netlink_call_async(link->manager->rtnl, NULL, req,
3450 force ? link_force_reconfigure_handler : link_reconfigure_handler,
3451 link_netlink_destroy_callback, link);
3452 if (r < 0)
3453 return r;
3454
3455 link_ref(link);
3456
3457 return 0;
3458}
3459
e6bf7774 3460static int link_initialized_and_synced(Link *link) {
505f8da7 3461 Network *network;
505f8da7
TG		 3462 int r;
3463
3464 assert(link);
3465 assert(link->ifname);
3466 assert(link->manager);
3467
bd08ce56
YW		 3468 /* We may get called either from the asynchronous netlink callback,
3469 * or directly for link_add() if running in a container. See link_add(). */
3470 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 3471 return 0;
505f8da7 3472
6a7a4e4d 3473 log_link_debug(link, "Link state is up-to-date");
bd08ce56 3474 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 3475
0d4ad91d
AR		 3476 r = link_new_bound_by_list(link);
3477 if (r < 0)
3478 return r;
3479
3480 r = link_handle_bound_by_list(link);
3481 if (r < 0)
3482 return r;
3483
c4a03a56 3484 if (!link->network) {
0894cfe4 3485 r = wifi_get_info(link);
8d968fdd
YW		 3486 if (r < 0)
3487 return r;
3488
c643bda5
YW		 3489 r = network_get(link->manager, link->iftype, link->sd_device,
3490 link->ifname, link->alternative_names, link->driver,
3491 &link->mac, &link->permanent_mac,
3492 link->wlan_iftype, link->ssid, &link->bssid, &network);
c4a03a56
TG		 3493 if (r == -ENOENT) {
3494 link_enter_unmanaged(link);
4232cf04 3495 return 0;
a09dc546
DM		 3496 } else if (r == 0 && network->unmanaged) {
3497 link_enter_unmanaged(link);
3498 return 0;
c4a03a56
TG		 3499 } else if (r < 0)
3500 return r;
505f8da7 3501
c4a03a56
TG		 3502 if (link->flags & IFF_LOOPBACK) {
3503 if (network->link_local != ADDRESS_FAMILY_NO)
3504 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3505
c4a03a56
TG		 3506 if (network->dhcp != ADDRESS_FAMILY_NO)
3507 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3508
c4a03a56
TG		 3509 if (network->dhcp_server)
3510 log_link_debug(link, "Ignoring DHCP server for loopback link");
3511 }
bd2efe92 3512
7d342c03 3513 r = network_apply(network, link);
c4a03a56
TG		 3514 if (r < 0)
3515 return r;
3516 }
505f8da7 3517
0d4ad91d
AR		 3518 r = link_new_bound_to_list(link);
3519 if (r < 0)
3520 return r;
3521
27dfc982
YW		 3522 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3523 * link_configure() is called later asynchronously. */
3524 r = link_configure_duid(link);
3525 if (r <= 0)
3526 return r;
3527
a748b692
TG		 3528 r = link_configure(link);
3529 if (r < 0)
3530 return r;
3531
4232cf04 3532 return 0;
505f8da7
TG		 3533}
3534
302a796f 3535static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
572b21d9 3536 _cleanup_strv_free_ char **s = NULL;
4ff296b0
YW		 3537 int r;
3538
572b21d9
YW		 3539 r = sd_netlink_message_get_errno(m);
3540 if (r < 0) {
40681e5c 3541 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 3542 link_enter_failed(link);
3543 return 0;
3544 }
3545
3546 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3547 if (r < 0 && r != -ENODATA) {
3548 link_enter_failed(link);
3549 return 0;
3550 }
3551
3552 strv_free_and_replace(link->alternative_names, s);
3553
4ff296b0
YW		 3554 r = link_initialized_and_synced(link);
3555 if (r < 0)
3556 link_enter_failed(link);
e6bf7774
YW		 3557 return 1;
3558}
3559
51517f9e 3560int link_initialized(Link *link, sd_device *device) {
4afd3348 3561 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3562 int r;
3563
3564 assert(link);
3565 assert(link->manager);
3566 assert(link->manager->rtnl);
3567 assert(device);
3568
8434fd5c 3569 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3570 return 0;
3571
51517f9e 3572 if (link->sd_device)
679b3605
TG		 3573 return 0;
3574
79008bdd 3575 log_link_debug(link, "udev initialized link");
bd08ce56 3576 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 3577
51517f9e 3578 link->sd_device = sd_device_ref(device);
4f561e8e 3579
3c9b8860
TG		 3580 /* udev has initialized the link, but we don't know if we have yet
3581 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3582 * when it returns we know that the pending NEWLINKs have already been
3583 * processed and that we are up-to-date */
4f561e8e 3584
3c9b8860
TG		 3585 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3586 link->ifindex);
4f561e8e
TG		 3587 if (r < 0)
3588 return r;
3589
302a796f
YW		 3590 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3591 link_netlink_destroy_callback, link);
4f561e8e
TG		 3592 if (r < 0)
3593 return r;
3594
5da8149f
TG		 3595 link_ref(link);
3596
4f561e8e
TG		 3597 return 0;
3598}
3599
c4a03a56 3600static int link_load(Link *link) {
0bc70f1d
TG		 3601 _cleanup_free_ char *network_file = NULL,
3602 *addresses = NULL,
f703cc2c 3603 *routes = NULL,
0bc70f1d
TG		 3604 *dhcp4_address = NULL,
3605 *ipv4ll_address = NULL;
3606 union in_addr_union address;
c4a03a56
TG		 3607 int r;
3608
3609 assert(link);
3610
aa8fbc74 3611 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3612 "NETWORK_FILE", &network_file,
3613 "ADDRESSES", &addresses,
f703cc2c 3614 "ROUTES", &routes,
0bc70f1d 3615 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3616 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3617 if (r < 0 && r != -ENOENT)
3618 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3619
3620 if (network_file) {
3621 Network *network;
3622 char *suffix;
3623
3624 /* drop suffix */
3625 suffix = strrchr(network_file, '.');
3626 if (!suffix) {
3627 log_link_debug(link, "Failed to get network name from %s", network_file);
3628 goto network_file_fail;
3629 }
3630 *suffix = '\0';
3631
3632 r = network_get_by_name(link->manager, basename(network_file), &network);
3633 if (r < 0) {
3634 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3635 goto network_file_fail;
3636 }
3637
7d342c03 3638 r = network_apply(network, link);
c4a03a56
TG		 3639 if (r < 0)
3640 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3641 }
3642
3643network_file_fail:
3644
1f68f772
ZJS		 3645 for (const char *p = addresses; p; ) {
3646 _cleanup_free_ char *address_str = NULL;
3647 char *prefixlen_str;
3648 int family;
3649 unsigned char prefixlen;
c4a03a56 3650
1f68f772
ZJS		 3651 r = extract_first_word(&p, &address_str, NULL, 0);
3652 if (r < 0)
3653 log_link_warning_errno(link, r, "failed to parse ADDRESSES: %m");
3654 if (r <= 0)
3655 break;
c4a03a56 3656
1f68f772
ZJS		 3657 prefixlen_str = strchr(address_str, '/');
3658 if (!prefixlen_str) {
3659 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
3660 continue;
3661 }
3662 *prefixlen_str++ = '\0';
c4a03a56 3663
1f68f772
ZJS		 3664 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3665 if (r != 1) {
3666 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3667 continue;
3668 }
c4a03a56 3669
1f68f772
ZJS		 3670 r = in_addr_from_string_auto(address_str, &family, &address);
3671 if (r < 0) {
3672 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
3673 continue;
c4a03a56 3674 }
c4a03a56 3675
1f68f772
ZJS		 3676 r = address_add(link, family, &address, prefixlen, NULL);
3677 if (r < 0)
3678 return log_link_error_errno(link, r, "Failed to add address: %m");
3679 }
74544b4e 3680
1f68f772
ZJS		 3681 for (const char *p = routes; p; ) {
3682 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
3683 _cleanup_(route_freep) Route *tmp = NULL;
3684 _cleanup_free_ char *route_str = NULL;
3685 char *prefixlen_str;
3686 Route *route;
f703cc2c 3687
1f68f772
ZJS		 3688 r = extract_first_word(&p, &route_str, NULL, 0);
3689 if (r < 0)
3690 log_link_debug_errno(link, r, "failed to parse ROUTES: %m");
3691 if (r <= 0)
3692 break;
c598ac76 3693
1f68f772
ZJS		 3694 prefixlen_str = strchr(route_str, '/');
3695 if (!prefixlen_str) {
3696 log_link_debug(link, "Failed to parse route %s", route_str);
3697 continue;
3698 }
3699 *prefixlen_str++ = '\0';
f703cc2c 3700
1f68f772
ZJS		 3701 r = route_new(&tmp);
3702 if (r < 0)
3703 return log_oom();
f703cc2c 3704
1f68f772
ZJS		 3705 r = sscanf(prefixlen_str,
3706 "%hhu/%hhu/%"SCNu32"/%"PRIu32"/"USEC_FMT,
3707 &tmp->dst_prefixlen,
3708 &tmp->tos,
3709 &tmp->priority,
3710 &tmp->table,
3711 &tmp->lifetime);
3712 if (r != 5) {
3713 log_link_debug(link,
3714 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3715 prefixlen_str);
3716 continue;
3717 }
f1368755 3718
1f68f772
ZJS		 3719 r = in_addr_from_string_auto(route_str, &tmp->family, &tmp->dst);
3720 if (r < 0) {
3721 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
3722 continue;
3723 }
f703cc2c 3724
1f68f772
ZJS		 3725 r = route_add(link, tmp, &route);
3726 if (r < 0)
3727 return log_link_error_errno(link, r, "Failed to add route: %m");
f703cc2c 3728
1f68f772
ZJS		 3729 if (route->lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
3730 r = sd_event_add_time(link->manager->event, &expire,
3731 clock_boottime_or_monotonic(),
3732 route->lifetime, 0, route_expire_handler, route);
f703cc2c 3733 if (r < 0)
1f68f772 3734 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
f703cc2c 3735 }
1f68f772
ZJS		 3736
3737 sd_event_source_unref(route->expire);
3738 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3739 }
3740
0bc70f1d
TG		 3741 if (dhcp4_address) {
3742 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3743 if (r < 0) {
b68d26b8 3744 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3745 goto dhcp4_address_fail;
3746 }
3747
b1c626f6 3748 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3749 if (r < 0)
b68d26b8 3750 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d 3751
1b43e246
DS		 3752 r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0);
3753 if (r < 0)
3754 return log_link_error_errno(link, r, "Failed to attach DHCPv4 event: %m");
3755
0bc70f1d
TG		 3756 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3757 if (r < 0)
b68d26b8 3758 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3759 }
3760
3761dhcp4_address_fail:
3762
3763 if (ipv4ll_address) {
3764 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3765 if (r < 0) {
b68d26b8 3766 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3767 goto ipv4ll_address_fail;
3768 }
3769
3770 r = sd_ipv4ll_new(&link->ipv4ll);
3771 if (r < 0)
b68d26b8 3772 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d 3773
1b43e246
DS		 3774 r = sd_ipv4ll_attach_event(link->ipv4ll, NULL, 0);
3775 if (r < 0)
3776 return log_link_error_errno(link, r, "Failed to attach IPv4LL event: %m");
3777
0bc70f1d
TG		 3778 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3779 if (r < 0)
b68d26b8 3780 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3781 }
3782
3783ipv4ll_address_fail:
3784
c4a03a56
TG		 3785 return 0;
3786}
3787
1c4baffc 3788int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3789 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3790 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3791 Link *link;
5a937ea2 3792 int r;
505f8da7
TG		 3793
3794 assert(m);
fbbeb65a 3795 assert(m->rtnl);
505f8da7
TG		 3796 assert(message);
3797 assert(ret);
3798
3799 r = link_new(m, message, ret);
3800 if (r < 0)
3801 return r;
3802
3803 link = *ret;
3804
6a7a4e4d 3805 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3806
c4a03a56
TG		 3807 r = link_load(link);
3808 if (r < 0)
3809 return r;
3810
bf331d87
YW		 3811 if (path_is_read_only_fs("/sys") <= 0) {
3812 /* udev should be around */
ae06ab10 3813 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3814 r = sd_device_new_from_device_id(&device, ifindex_str);
3815 if (r < 0) {
4d59e14f
YW		 3816 log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m");
3817 return 0;
5c416fc4 3818 }
505f8da7 3819
5a937ea2 3820 r = sd_device_get_is_initialized(device);
51517f9e 3821 if (r < 0) {
bf331d87 3822 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 3823 goto failed;
3824 }
5a937ea2 3825 if (r == 0) {
505f8da7 3826 /* not yet ready */
79008bdd 3827 log_link_debug(link, "link pending udev initialization...");
505f8da7 3828 return 0;
3c4cb064 3829 }
505f8da7 3830
299ad32d
YW		 3831 r = device_is_renaming(device);
3832 if (r < 0) {
bf331d87 3833 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 3834 goto failed;
3835 }
3836 if (r > 0) {
bf331d87 3837 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 3838 return 0;
3839 }
3840
4f561e8e
TG		 3841 r = link_initialized(link, device);
3842 if (r < 0)
5c416fc4 3843 goto failed;
4f561e8e 3844 } else {
e6bf7774 3845 r = link_initialized_and_synced(link);
4f561e8e 3846 if (r < 0)
5c416fc4 3847 goto failed;
4f561e8e 3848 }
505f8da7 3849
a748b692 3850 return 0;
5c416fc4
TG		 3851failed:
3852 link_enter_failed(link);
3853 return r;
a748b692
TG		 3854}
3855
c601ebf7 3856int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3857 int r;
3858
3859 assert(link);
3860
3861 log_link_info(link, "Gained IPv6LL");
3862
c601ebf7 3863 link->ipv6ll_address = *address;
e7ab854c
TG		 3864 link_check_ready(link);
3865
b9ea3d2e 3866 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3867 r = link_acquire_ipv6_conf(link);
3868 if (r < 0) {
3869 link_enter_failed(link);
3870 return r;
3871 }
3872 }
3873
3874 return 0;
3875}
3876
9c0a72f9
TG		 3877static int link_carrier_gained(Link *link) {
3878 int r;
3879
3880 assert(link);
3881
0894cfe4 3882 r = wifi_get_info(link);
8d968fdd
YW		 3883 if (r < 0)
3884 return r;
3885 if (r > 0) {
572b21d9
YW		 3886 r = link_reconfigure_internal(link, NULL, false);
3887 if (r < 0) {
3888 link_enter_failed(link);
8d968fdd 3889 return r;
572b21d9 3890 }
8d968fdd
YW		 3891 }
3892
b9ea3d2e 3893 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3894 r = link_acquire_conf(link);
3895 if (r < 0) {
3896 link_enter_failed(link);
3897 return r;
3898 }
6fc25497 3899
b425c3ae 3900 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 3901 r = link_request_set_addresses(link);
6fc25497
SS		 3902 if (r < 0)
3903 return r;
9c0a72f9
TG		 3904 }
3905
0d4ad91d
AR		 3906 r = link_handle_bound_by_list(link);
3907 if (r < 0)
3908 return r;
3909
9c0a72f9
TG		 3910 return 0;
3911}
3912
3913static int link_carrier_lost(Link *link) {
3914 int r;
3915
3916 assert(link);
3917
25e992ba 3918 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3919 return 0;
3920
fbdb6605 3921 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3922 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3923 * configuration and stop the clients as well. */
97e7fb39
SS		 3924 if (link->setting_mtu)
3925 return 0;
3926
95355a28 3927 r = link_stop_clients(link, false);
9c0a72f9
TG		 3928 if (r < 0) {
3929 link_enter_failed(link);
3930 return r;
3931 }
3932
28464ae0
SS		 3933 if (link_dhcp4_server_enabled(link))
3934 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3935
3104883d
SS		 3936 r = link_drop_config(link);
3937 if (r < 0)
3938 return r;
3939
2c7b826d 3940 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
f258e948 3941 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3942 r = link_drop_foreign_config(link);
3943 if (r < 0)
3944 return r;
3945 }
3104883d 3946
0d4ad91d
AR		 3947 r = link_handle_bound_by_list(link);
3948 if (r < 0)
3949 return r;
3950
9c0a72f9
TG		 3951 return 0;
3952}
3953
3954int link_carrier_reset(Link *link) {
3955 int r;
3956
3957 assert(link);
3958
3959 if (link_has_carrier(link)) {
3960 r = link_carrier_lost(link);
3961 if (r < 0)
3962 return r;
3963
3964 r = link_carrier_gained(link);
3965 if (r < 0)
3966 return r;
3967
6a7a4e4d 3968 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3969 }
3970
3971 return 0;
3972}
3973
d236718c
DS		 3974/* This is called every time an interface admin state changes to up;
3975 * specifically, when IFF_UP flag changes from unset to set */
3976static int link_admin_state_up(Link *link) {
3977 int r;
3978
3979 /* We set the ipv6 mtu after the device mtu, but the kernel resets
3980 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
3981 * ipv6_mtu_set prevents this from trying to set it too early before
3982 * the link->network has been setup; we only need to reset it
3983 * here if we've already set it during normal initialization. */
3984 if (link->ipv6_mtu_set) {
3985 r = link_set_ipv6_mtu(link);
3986 if (r < 0)
3987 return r;
3988 }
3989
3990 return 0;
3991}
3992
1c4baffc 3993int link_update(Link *link, sd_netlink_message *m) {
572b21d9 3994 _cleanup_strv_free_ char **s = NULL;
c49b33ac 3995 struct ether_addr mac;
ca4e095a 3996 const char *ifname;
afe7fd56 3997 uint32_t mtu;
d236718c 3998 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 3999 int old_master, r;
22936833 4000
dd3efc09 4001 assert(link);
b8941f74 4002 assert(link->ifname);
22936833
TG		 4003 assert(m);
4004
7619683b 4005 if (link->state == LINK_STATE_LINGER) {
5238e957 4006 log_link_info(link, "Link re-added");
289e6774 4007 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 4008
4009 r = link_new_carrier_maps(link);
4010 if (r < 0)
4011 return r;
7619683b
TG		 4012 }
4013
1c4baffc 4014 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 4015 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 4016 Manager *manager = link->manager;
b8941f74 4017
30de2b89 4018 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 4019
30de2b89
YW		 4020 link_drop(link);
4021 r = link_add(manager, m, &link);
4022 if (r < 0)
4023 return r;
b8941f74
TG		 4024 }
4025
572b21d9
YW		 4026 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
4027 if (r >= 0)
4028 strv_free_and_replace(link->alternative_names, s);
4029
1c4baffc 4030 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 4031 if (r >= 0 && mtu > 0) {
4032 link->mtu = mtu;
4e964aa0 4033 if (link->original_mtu == 0) {
afe7fd56 4034 link->original_mtu = mtu;
6a7a4e4d 4035 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 4036 }
4037
4038 if (link->dhcp_client) {
3c9b8860
TG		 4039 r = sd_dhcp_client_set_mtu(link->dhcp_client,
4040 link->mtu);
fc95c359
YW		 4041 if (r < 0)
4042 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 4043 }
7465dd22
PF		 4044
4045 if (link->radv) {
4046 r = sd_radv_set_mtu(link->radv, link->mtu);
4047 if (r < 0)
4048 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
4049 }
9842de0d 4050 }
69629de9 4051
e9189a1f
TG		 4052 /* The kernel may broadcast NEWLINK messages without the MAC address
4053 set, simply ignore them. */
1c4baffc 4054 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
807667f7
YW		 4055 if (r >= 0 && memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN) != 0) {
4056
4057 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN);
4058
4059 log_link_debug(link, "Gained new MAC address: "
4060 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
4061 mac.ether_addr_octet[0],
4062 mac.ether_addr_octet[1],
4063 mac.ether_addr_octet[2],
4064 mac.ether_addr_octet[3],
4065 mac.ether_addr_octet[4],
4066 mac.ether_addr_octet[5]);
4067
4068 if (link->ipv4ll) {
4069 bool restart = sd_ipv4ll_is_running(link->ipv4ll) > 0;
4070
4071 if (restart) {
4072 r = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 4073 if (r < 0)
807667f7 4074 return log_link_warning_errno(link, r, "Could not stop IPv4LL client: %m");
c49b33ac 4075 }
c49b33ac 4076
807667f7
YW		 4077 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
4078 if (r < 0)
4079 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
4080
4081 if (restart) {
4082 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d 4083 if (r < 0)
807667f7
YW		 4084 return log_link_warning_errno(link, r, "Could not restart IPv4LL client: %m");
4085 }
4086 }
4087
4088 if (link->dhcp_client) {
4089 r = sd_dhcp_client_set_mac(link->dhcp_client,
4090 (const uint8_t *) &link->mac,
4091 sizeof (link->mac),
4092 ARPHRD_ETHER);
4093 if (r < 0)
4094 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
4095
4096 r = dhcp4_set_client_identifier(link);
4097 if (r < 0)
4098 return log_link_warning_errno(link, r, "Could not set DHCP client identifier: %m");
4099 }
413708d1 4100
807667f7
YW		 4101 if (link->dhcp6_client) {
4102 const DUID* duid = link_get_duid(link);
4103 bool restart = sd_dhcp6_client_is_running(link->dhcp6_client) > 0;
4104
4105 if (restart) {
4106 r = sd_dhcp6_client_stop(link->dhcp6_client);
fff1f40c 4107 if (r < 0)
807667f7 4108 return log_link_warning_errno(link, r, "Could not stop DHCPv6 client: %m");
c49b33ac 4109 }
4138fb2c 4110
807667f7
YW		 4111 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
4112 (const uint8_t *) &link->mac,
4113 sizeof (link->mac),
4114 ARPHRD_ETHER);
4115 if (r < 0)
4116 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
8341a5c3 4117
807667f7
YW		 4118 if (link->network->iaid_set) {
4119 r = sd_dhcp6_client_set_iaid(link->dhcp6_client, link->network->iaid);
6a7a4e4d 4120 if (r < 0)
807667f7
YW		 4121 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
4122 }
4123
4124 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
4125 duid->type,
4126 duid->raw_data_len > 0 ? duid->raw_data : NULL,
4127 duid->raw_data_len);
4128 if (r < 0)
4129 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4130
4131 if (restart) {
4132 r = sd_dhcp6_client_start(link->dhcp6_client);
413708d1 4133 if (r < 0)
807667f7 4134 return log_link_warning_errno(link, r, "Could not restart DHCPv6 client: %m");
4138fb2c 4135 }
807667f7 4136 }
7465dd22 4137
807667f7
YW		 4138 if (link->radv) {
4139 bool restart = sd_radv_is_running(link->radv);
4140
4141 if (restart) {
4142 r = sd_radv_stop(link->radv);
7465dd22 4143 if (r < 0)
807667f7 4144 return log_link_warning_errno(link, r, "Could not stop Router Advertisement: %m");
7465dd22 4145 }
420d2058 4146
807667f7
YW		 4147 r = sd_radv_set_mac(link->radv, &link->mac);
4148 if (r < 0)
4149 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
4150
4151 if (restart) {
4152 r = sd_radv_start(link->radv);
420d2058 4153 if (r < 0)
807667f7 4154 return log_link_warning_errno(link, r, "Could not restart Router Advertisement: %m");
420d2058 4155 }
c49b33ac 4156 }
807667f7
YW		 4157
4158 if (link->ndisc) {
4159 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
4160 if (r < 0)
4161 return log_link_warning_errno(link, r, "Could not update MAC for NDisc: %m");
4162 }
4f882b2a
TG		 4163 }
4164
bb262ef0
YW		 4165 old_master = link->master_ifindex;
4166 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
4167
d236718c 4168 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 4169 had_carrier = link_has_carrier(link);
4170
bb262ef0 4171 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 4172 if (r < 0)
4173 return r;
4174
d236718c
DS		 4175 if (!link_was_admin_up && (link->flags & IFF_UP)) {
4176 log_link_info(link, "Link UP");
4177
4178 r = link_admin_state_up(link);
4179 if (r < 0)
4180 return r;
4181 } else if (link_was_admin_up && !(link->flags & IFF_UP))
4182 log_link_info(link, "Link DOWN");
4183
273eec24
LP		 4184 r = link_update_lldp(link);
4185 if (r < 0)
4186 return r;
4187
a61bb41c
TG		 4188 carrier_gained = !had_carrier && link_has_carrier(link);
4189 carrier_lost = had_carrier && !link_has_carrier(link);
4190
4191 if (carrier_gained) {
6a7a4e4d 4192 log_link_info(link, "Gained carrier");
a61bb41c 4193
9c0a72f9
TG		 4194 r = link_carrier_gained(link);
4195 if (r < 0)
4196 return r;
a61bb41c 4197 } else if (carrier_lost) {
6a7a4e4d 4198 log_link_info(link, "Lost carrier");
a61bb41c 4199
9c0a72f9
TG		 4200 r = link_carrier_lost(link);
4201 if (r < 0)
a61bb41c 4202 return r;
a61bb41c
TG		 4203 }
4204
4205 return 0;
dd3efc09 4206}
fe8db0c5 4207
b295beea
LP		 4208static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
4209 bool space = false;
b295beea
LP		 4210 Link *link;
4211
4212 assert(f);
4213 assert(prefix);
4214
4215 if (hashmap_isempty(h))
4216 return;
4217
0d536673 4218 fputs(prefix, f);
90e74a66 4219 HASHMAP_FOREACH(link, h) {
b295beea 4220 if (space)
0d536673 4221 fputc(' ', f);
b295beea
LP		 4222
4223 fprintf(f, "%i", link->ifindex);
4224 space = true;
4225 }
4226
0d536673 4227 fputc('\n', f);
b295beea
LP		 4228}
4229
64581765 4230static void link_save_dns(Link *link, FILE *f, struct in_addr_full **dns, unsigned n_dns, bool *space) {
dddc8d1e 4231 for (unsigned j = 0; j < n_dns; j++) {
e77bd3fd 4232 const char *str;
15761549 4233
64581765
YW		 4234 if (dns[j]->ifindex != 0 && dns[j]->ifindex != link->ifindex)
4235 continue;
4236
e77bd3fd
YW		 4237 str = in_addr_full_to_string(dns[j]);
4238 if (!str)
15761549 4239 continue;
15761549
YW		 4240
4241 if (*space)
4242 fputc(' ', f);
e77bd3fd 4243 fputs(str, f);
15761549
YW		 4244 *space = true;
4245 }
4246}
4247
d5e172d2
ZJS		 4248static void serialize_addresses(
4249 FILE *f,
4250 const char *lvalue,
4251 bool *space,
4252 char **addresses,
4253 sd_dhcp_lease *lease,
4254 bool conditional,
ddb82ec2 4255 sd_dhcp_lease_server_type what,
d5e172d2
ZJS		 4256 sd_dhcp6_lease *lease6,
4257 bool conditional6,
4258 int (*lease6_get_addr)(sd_dhcp6_lease*, const struct in6_addr**),
4259 int (*lease6_get_fqdn)(sd_dhcp6_lease*, char ***)) {
4260 int r;
4261
4262 bool _space = false;
4263 if (!space)
4264 space = &_space;
4265
4266 if (lvalue)
4267 fprintf(f, "%s=", lvalue);
4268 fputstrv(f, addresses, NULL, space);
4269
4270 if (lease && conditional) {
4271 const struct in_addr *lease_addresses;
4272
4273 r = sd_dhcp_lease_get_servers(lease, what, &lease_addresses);
4274 if (r > 0)
d8bff5cc 4275 serialize_in_addrs(f, lease_addresses, r, space, in4_addr_is_non_local);
d5e172d2
ZJS		 4276 }
4277
4278 if (lease6 && conditional6 && lease6_get_addr) {
4279 const struct in6_addr *in6_addrs;
4280
4281 r = lease6_get_addr(lease6, &in6_addrs);
d8bff5cc
ZJS		 4282 if (r > 0)
4283 serialize_in6_addrs(f, in6_addrs, r, space);
d5e172d2
ZJS		 4284 }
4285
4286 if (lease6 && conditional6 && lease6_get_fqdn) {
4287 char **in6_hosts;
4288
4289 r = lease6_get_fqdn(lease6, &in6_hosts);
4290 if (r > 0)
4291 fputstrv(f, in6_hosts, NULL, space);
4292 }
4293
4294 if (lvalue)
4295 fputc('\n', f);
4296}
4297
fe8db0c5 4298int link_save(Link *link) {
d361b373 4299 const char *admin_state, *oper_state, *carrier_state, *address_state;
68a8723c 4300 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 4301 _cleanup_fclose_ FILE *f = NULL;
c1eb9872 4302 Route *route;
18d8a2cf 4303 Address *a;
fe8db0c5
TG		 4304 int r;
4305
4306 assert(link);
4307 assert(link->state_file);
68a8723c 4308 assert(link->lease_file);
bbf7c048
TG		 4309 assert(link->manager);
4310
370e9930 4311 if (link->state == LINK_STATE_LINGER) {
6990fb6b 4312 (void) unlink(link->state_file);
370e9930
TG		 4313 return 0;
4314 }
4315
34437b4f
LP		 4316 link_lldp_save(link);
4317
deb2e523
TG		 4318 admin_state = link_state_to_string(link->state);
4319 assert(admin_state);
4320
e375dcde
TG		 4321 oper_state = link_operstate_to_string(link->operstate);
4322 assert(oper_state);
deb2e523 4323
ac999bf0
YW		 4324 carrier_state = link_carrier_state_to_string(link->carrier_state);
4325 assert(carrier_state);
4326
4327 address_state = link_address_state_to_string(link->address_state);
4328 assert(address_state);
4329
fe8db0c5
TG		 4330 r = fopen_temporary(link->state_file, &f, &temp_path);
4331 if (r < 0)
6a7a4e4d 4332 goto fail;
fe8db0c5 4333
5512a963 4334 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 4335
4336 fprintf(f,
4337 "# This is private data. Do not parse.\n"
deb2e523 4338 "ADMIN_STATE=%s\n"
ac999bf0
YW		 4339 "OPER_STATE=%s\n"
4340 "CARRIER_STATE=%s\n"
4341 "ADDRESS_STATE=%s\n",
4342 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 4343
bcb7a07e 4344 if (link->network) {
fe0e16db
YW		 4345 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
4346 const char *dhcp_domainname = NULL, *p;
fe0e16db 4347 bool space;
07bdc70d 4348
c1a38904
MTL		 4349 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
4350 yes_no(link->network->required_for_online));
4351
d5e172d2
ZJS		 4352 LinkOperationalStateRange st = link->network->required_operstate_for_online;
4353 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s%s%s\n",
4354 strempty(link_operstate_to_string(st.min)),
4355 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? ":" : "",
4356 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? strempty(link_operstate_to_string(st.max)) : "");
4ac77d63 4357
adc5b2e2
TG		 4358 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
4359
d5e172d2
ZJS		 4360 /************************************************************/
4361
0d536673 4362 fputs("DNS=", f);
ea352b40 4363 space = false;
15761549 4364 if (link->n_dns != (unsigned) -1)
64581765 4365 link_save_dns(link, f, link->dns, link->n_dns, &space);
15761549 4366 else
64581765 4367 link_save_dns(link, f, link->network->dns, link->network->n_dns, &space);
d5314fff 4368
d5e172d2
ZJS		 4369 serialize_addresses(f, NULL, &space,
4370 NULL,
4371 link->dhcp_lease,
4372 link->network->dhcp_use_dns,
ddb82ec2 4373 SD_DHCP_LEASE_DNS,
1633c457 4374 link->dhcp6_lease,
d5e172d2
ZJS		 4375 link->network->dhcp6_use_dns,
4376 sd_dhcp6_lease_get_dns,
4377 NULL);
1e7a0e21 4378
a8c10331 4379 /* Make sure to flush out old entries before we use the NDisc data */
1e7a0e21
LP		 4380 ndisc_vacuum(link);
4381
b296797f 4382 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 4383 NDiscRDNSS *dd;
4384
90e74a66 4385 SET_FOREACH(dd, link->ndisc_rdnss)
d8bff5cc 4386 serialize_in6_addrs(f, &dd->address, 1, &space);
299d578f
SS		 4387 }
4388
4389 fputc('\n', f);
4390
d5e172d2
ZJS		 4391 /************************************************************/
4392
4393 serialize_addresses(f, "NTP", NULL,
4394 link->ntp ?: link->network->ntp,
4395 link->dhcp_lease,
4396 link->network->dhcp_use_ntp,
ddb82ec2 4397 SD_DHCP_LEASE_NTP,
1633c457 4398 link->dhcp6_lease,
d5e172d2
ZJS		 4399 link->network->dhcp6_use_ntp,
4400 sd_dhcp6_lease_get_ntp_addrs,
4401 sd_dhcp6_lease_get_ntp_fqdn);
4402
4403 serialize_addresses(f, "SIP", NULL,
2a71d57f 4404 NULL,
d5e172d2
ZJS		 4405 link->dhcp_lease,
4406 link->network->dhcp_use_sip,
ddb82ec2 4407 SD_DHCP_LEASE_SIP,
2a71d57f 4408 NULL, false, NULL, NULL);
d5e172d2
ZJS		 4409
4410 /************************************************************/
bd8f6538 4411
b2a81c0b 4412 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 4413 if (link->dhcp_lease) {
b2a81c0b 4414 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 4415 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
4416 }
1633c457
YW		 4417 if (link->dhcp6_lease)
4418 (void) sd_dhcp6_lease_get_domains(link->dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 4419 }
4420
fe0e16db
YW		 4421 fputs("DOMAINS=", f);
4422 space = false;
90e74a66 4423 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains)
fe0e16db 4424 fputs_with_space(f, p, NULL, &space);
07bdc70d 4425
1e7a0e21 4426 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP		 4427 if (dhcp_domainname)
4428 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4429 if (dhcp_domains)
4430 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4431 if (dhcp6_domains)
4432 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 4433 }
4434
4435 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
4436 NDiscDNSSL *dd;
1e7a0e21 4437
90e74a66 4438 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 4439 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4440 }
b2a81c0b 4441
0d536673 4442 fputc('\n', f);
6192b846 4443
d5e172d2
ZJS		 4444 /************************************************************/
4445
fe0e16db
YW		 4446 fputs("ROUTE_DOMAINS=", f);
4447 space = false;
90e74a66 4448 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains)
fe0e16db 4449 fputs_with_space(f, p, NULL, &space);
b2a81c0b 4450
1e7a0e21 4451 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
1e7a0e21
LP		 4452 if (dhcp_domainname)
4453 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4454 if (dhcp_domains)
4455 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4456 if (dhcp6_domains)
4457 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 4458 }
4459
4460 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
4461 NDiscDNSSL *dd;
1e7a0e21 4462
90e74a66 4463 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 4464 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4465 }
b2a81c0b 4466
0d536673 4467 fputc('\n', f);
67272d15 4468
d5e172d2
ZJS		 4469 /************************************************************/
4470
3c9b8860 4471 fprintf(f, "LLMNR=%s\n",
15761549 4472 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
d5e172d2
ZJS		 4473
4474 /************************************************************/
4475
aaa297d4 4476 fprintf(f, "MDNS=%s\n",
15761549 4477 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
15761549 4478
d5e172d2
ZJS		 4479 /************************************************************/
4480
4481 int dns_default_route =
4482 link->dns_default_route >= 0 ? link->dns_default_route :
4483 link->network->dns_default_route;
4484 if (dns_default_route >= 0)
4485 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(dns_default_route));
4486
4487 /************************************************************/
4488
4489 DnsOverTlsMode dns_over_tls_mode =
4490 link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID ? link->dns_over_tls_mode :
4491 link->network->dns_over_tls_mode;
4492 if (dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
4493 fprintf(f, "DNS_OVER_TLS=%s\n", dns_over_tls_mode_to_string(dns_over_tls_mode));
4494
4495 /************************************************************/
4496
4497 DnssecMode dnssec_mode =
4498 link->dnssec_mode != _DNSSEC_MODE_INVALID ? link->dnssec_mode :
4499 link->network->dnssec_mode;
4500 if (dnssec_mode != _DNSSEC_MODE_INVALID)
4501 fprintf(f, "DNSSEC=%s\n", dnssec_mode_to_string(dnssec_mode));
4502
4503 /************************************************************/
4504
4505 Set *nta_anchors = link->dnssec_negative_trust_anchors;
4506 if (set_isempty(nta_anchors))
4507 nta_anchors = link->network->dnssec_negative_trust_anchors;
4508
4509 if (!set_isempty(nta_anchors)) {
8a516214
LP		 4510 const char *n;
4511
0d536673 4512 fputs("DNSSEC_NTA=", f);
8a516214 4513 space = false;
90e74a66 4514 SET_FOREACH(n, nta_anchors)
d390f8ef 4515 fputs_with_space(f, n, NULL, &space);
0d536673 4516 fputc('\n', f);
8a516214
LP		 4517 }
4518
d5e172d2
ZJS		 4519 /************************************************************/
4520
0d536673 4521 fputs("ADDRESSES=", f);
e7780c8d 4522 space = false;
90e74a66 4523 SET_FOREACH(a, link->addresses) {
e7780c8d
TG		 4524 _cleanup_free_ char *address_str = NULL;
4525
4526 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
4527 if (r < 0)
4528 goto fail;
4529
e7780c8d
TG		 4530 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
4531 space = true;
4532 }
0d536673 4533 fputc('\n', f);
c1eb9872 4534
d5e172d2
ZJS		 4535 /************************************************************/
4536
0d536673 4537 fputs("ROUTES=", f);
c1eb9872 4538 space = false;
90e74a66 4539 SET_FOREACH(route, link->routes) {
c1eb9872
TG		 4540 _cleanup_free_ char *route_str = NULL;
4541
4542 r = in_addr_to_string(route->family, &route->dst, &route_str);
4543 if (r < 0)
4544 goto fail;
4545
ecc3f340
ZJS		 4546 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
4547 space ? " " : "", route_str,
f833694d 4548 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 4549 space = true;
4550 }
4551
0d536673 4552 fputc('\n', f);
bcb7a07e 4553 }
7374f9d8 4554
b295beea
LP		 4555 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
4556 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 4557
8eb9058d 4558 if (link->dhcp_lease) {
bd91b83e 4559 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 4560 if (r < 0)
c2d6bd61 4561 goto fail;
fe8db0c5 4562
7374f9d8 4563 fprintf(f,
b0e39c82
TG		 4564 "DHCP_LEASE=%s\n",
4565 link->lease_file);
deb2e523 4566 } else
6990fb6b 4567 (void) unlink(link->lease_file);
fe8db0c5 4568
0bc70f1d
TG		 4569 if (link->ipv4ll) {
4570 struct in_addr address;
4571
4572 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
4573 if (r >= 0) {
0d536673 4574 fputs("IPV4LL_ADDRESS=", f);
072320ea 4575 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 4576 fputc('\n', f);
0bc70f1d
TG		 4577 }
4578 }
4579
7e738e7b
SS		 4580 if (link->dhcp6_client) {
4581 _cleanup_free_ char *duid = NULL;
4582 uint32_t iaid;
4583
4584 r = sd_dhcp6_client_get_iaid(link->dhcp6_client, &iaid);
4585 if (r >= 0)
4586 fprintf(f, "DHCP6_CLIENT_IAID=0x%x\n", iaid);
4587
4588 r = sd_dhcp6_client_duid_as_string(link->dhcp6_client, &duid);
4589 if (r >= 0)
4590 fprintf(f, "DHCP6_CLIENT_DUID=%s\n", duid);
4591 }
18d8a2cf 4592
c2d6bd61
LP		 4593 r = fflush_and_check(f);
4594 if (r < 0)
4595 goto fail;
fe8db0c5 4596
c2d6bd61 4597 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 4598 r = -errno;
c2d6bd61 4599 goto fail;
fe8db0c5
TG		 4600 }
4601
c2d6bd61 4602 return 0;
dacd6cee 4603
c2d6bd61 4604fail:
6a7a4e4d 4605 (void) unlink(link->state_file);
6a7a4e4d
LP		 4606 if (temp_path)
4607 (void) unlink(temp_path);
4608
dacd6cee 4609 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 4610}
4611
84de38c5
TG		 4612/* The serialized state in /run is no longer up-to-date. */
4613void link_dirty(Link *link) {
4614 int r;
4615
4616 assert(link);
4617
0c241a37
SS		 4618 /* mark manager dirty as link is dirty */
4619 manager_dirty(link->manager);
4620
de7fef4b 4621 r = set_ensure_put(&link->manager->dirty_links, NULL, link);
0c241a37 4622 if (r <= 0)
de7fef4b 4623 /* Ignore allocation errors and don't take another ref if the link was already dirty */
84de38c5 4624 return;
84de38c5
TG		 4625 link_ref(link);
4626}
4627
4628/* The serialized state in /run is up-to-date */
4629void link_clean(Link *link) {
4630 assert(link);
4631 assert(link->manager);
4632
1046bf9b 4633 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4634}
4635
c2a65950
YW		 4636int link_save_and_clean(Link *link) {
4637 int r;
4638
4639 r = link_save(link);
4640 if (r < 0)
4641 return r;
4642
4643 link_clean(link);
4644 return 0;
4645}
4646
fe8db0c5 4647static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4648 [LINK_STATE_PENDING] = "pending",
bd08ce56 4649 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 4650 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 4651 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4652 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4653 [LINK_STATE_FAILED] = "failed",
370e9930 4654 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4655};
4656
4657DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
5ecb131d
YW		 4658
4659int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg) {
4660 const char *err_msg = NULL;
4661
4662 (void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg);
ab119e63
YW		 4663 return log_link_full(link, level, err,
4664 "%s: %s%s%s%m",
4665 msg,
4666 strempty(err_msg),
4667 err_msg && !endswith(err_msg, ".") ? "." : "",
4668 err_msg ? " " : "");
5ecb131d 4669}
Unnamed repository; edit this file 'description' to name the repository.