]> git.ipfire.org Git - thirdparty/systemd.git/blame - src/network/networkd-link.c
projects / thirdparty / systemd.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
network: ndisc: split ndisc_configured flag into for addresses and routes
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
53e1b683 1/* SPDX-License-Identifier: LGPL-2.1+ */
f579559b 2
9aa5d8ba 3#include <netinet/in.h>
f579559b 4#include <linux/if.h>
8f815e8b 5#include <linux/if_arp.h>
518cd6b5 6#include <linux/if_link.h>
4cc7a82c 7#include <unistd.h>
f579559b 8
b5efdb8a 9#include "alloc-util.h"
737f1405
YW		 10#include "bond.h"
11#include "bridge.h"
1346b1f0 12#include "bus-util.h"
27dfc982 13#include "dhcp-identifier.h"
bd91b83e 14#include "dhcp-lease-internal.h"
686d13b9 15#include "env-file.h"
4bb7cc82 16#include "ethtool-util.h"
3ffd4af2 17#include "fd-util.h"
cf1d700d 18#include "fileio.h"
737f1405 19#include "ipvlan.h"
ef118d00 20#include "missing_network.h"
cf1d700d 21#include "netlink-util.h"
c6f7c917 22#include "network-internal.h"
3ddcbeea 23#include "networkd-can.h"
8fcf1d61 24#include "networkd-dhcp-server.h"
ca5ad760
YW		 25#include "networkd-dhcp4.h"
26#include "networkd-dhcp6.h"
27#include "networkd-ipv4ll.h"
a0e5c15d 28#include "networkd-ipv6-proxy-ndp.h"
6a1af3d4
YW		 29#include "networkd-link-bus.h"
30#include "networkd-link.h"
8e1ad1ea 31#include "networkd-lldp-tx.h"
23f53b99 32#include "networkd-manager.h"
1e7a0e21 33#include "networkd-ndisc.h"
e4a71bf3 34#include "networkd-neighbor.h"
518cd6b5 35#include "networkd-sriov.h"
7465dd22 36#include "networkd-radv.h"
bce67bbe 37#include "networkd-routing-policy-rule.h"
8d968fdd 38#include "networkd-wifi.h"
cf1d700d
TG		 39#include "set.h"
40#include "socket-util.h"
bf331d87 41#include "stat-util.h"
15a5e950 42#include "stdio-util.h"
8b43440b 43#include "string-table.h"
51517f9e 44#include "strv.h"
62e021a9 45#include "sysctl-util.h"
34658df2 46#include "tc.h"
e4de7287 47#include "tmpfile-util.h"
299ad32d 48#include "udev-util.h"
cf1d700d 49#include "util.h"
737f1405 50#include "vrf.h"
fc2f9534 51
bdb9f580
YW		 52uint32_t link_get_vrf_table(Link *link) {
53 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
54}
55
56uint32_t link_get_dhcp_route_table(Link *link) {
57 /* When the interface is part of an VRF use the VRFs routing table, unless
58 * another table is explicitly specified. */
59 if (link->network->dhcp_route_table_set)
60 return link->network->dhcp_route_table;
61 return link_get_vrf_table(link);
62}
63
64uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
65 if (link->network->ipv6_accept_ra_route_table_set)
66 return link->network->ipv6_accept_ra_route_table;
67 return link_get_vrf_table(link);
68}
69
f24648a6
YW		 70DUID* link_get_duid(Link *link) {
71 if (link->network->duid.type != _DUID_TYPE_INVALID)
72 return &link->network->duid;
73 else
74 return &link->manager->duid;
75}
76
b9d74c40
LP		 77static bool link_dhcp6_enabled(Link *link) {
78 assert(link);
79
fa709992
LP		 80 if (!socket_ipv6_is_supported())
81 return false;
82
78c958f8
TG		 83 if (link->flags & IFF_LOOPBACK)
84 return false;
85
86 if (!link->network)
87 return false;
88
f2bfcdb9
YW		 89 if (link->network->bond)
90 return false;
91
500b96eb 92 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 93 return false;
94
e0ee46f2 95 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 96}
97
b9d74c40
LP		 98static bool link_dhcp4_enabled(Link *link) {
99 assert(link);
100
78c958f8
TG		 101 if (link->flags & IFF_LOOPBACK)
102 return false;
103
104 if (!link->network)
105 return false;
106
f2bfcdb9
YW		 107 if (link->network->bond)
108 return false;
109
500b96eb 110 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 111 return false;
112
e0ee46f2 113 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 114}
115
b9d74c40
LP		 116static bool link_dhcp4_server_enabled(Link *link) {
117 assert(link);
118
78c958f8
TG		 119 if (link->flags & IFF_LOOPBACK)
120 return false;
121
122 if (!link->network)
123 return false;
124
f2bfcdb9
YW		 125 if (link->network->bond)
126 return false;
127
500b96eb 128 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 129 return false;
130
78c958f8
TG		 131 return link->network->dhcp_server;
132}
133
2d792895 134bool link_ipv4ll_enabled(Link *link, AddressFamily mask) {
b9d74c40 135 assert(link);
910feb78 136 assert((mask & ~(ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) == 0);
b9d74c40 137
78c958f8
TG		 138 if (link->flags & IFF_LOOPBACK)
139 return false;
140
141 if (!link->network)
142 return false;
143
500b96eb 144 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 145 return false;
146
98d20a17 147 if (STRPTR_IN_SET(link->kind,
148 "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
c6ac3729 149 "vti6", "nlmon", "xfrm"))
a8f5bba6
JD		 150 return false;
151
f410d463
YW		 152 /* L3 or L3S mode do not support ARP. */
153 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
154 return false;
155
f2bfcdb9
YW		 156 if (link->network->bond)
157 return false;
158
910feb78 159 return link->network->link_local & mask;
8bc17bb3
SS		 160}
161
b9d74c40
LP		 162static bool link_ipv6ll_enabled(Link *link) {
163 assert(link);
164
fa709992
LP		 165 if (!socket_ipv6_is_supported())
166 return false;
167
d0d6a4cd
TG		 168 if (link->flags & IFF_LOOPBACK)
169 return false;
170
171 if (!link->network)
172 return false;
173
500b96eb 174 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 175 return false;
176
177 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon"))
a8f5bba6
JD		 178 return false;
179
f2bfcdb9
YW		 180 if (link->network->bond)
181 return false;
182
e0ee46f2 183 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 184}
185
439689c6
SS		 186static bool link_ipv6_enabled(Link *link) {
187 assert(link);
188
189 if (!socket_ipv6_is_supported())
190 return false;
191
b102cdca 192 if (link->network->bond)
2b00a4e0
TY		 193 return false;
194
500b96eb 195 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 196 return false;
197
4cef7fe3 198 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
adfeee49
YW		 199 if (link_ipv6ll_enabled(link))
200 return true;
201
202 if (network_has_static_ipv6_configurations(link->network))
203 return true;
204
205 return false;
439689c6
SS		 206}
207
7465dd22
PF		 208static bool link_radv_enabled(Link *link) {
209 assert(link);
210
211 if (!link_ipv6ll_enabled(link))
212 return false;
213
55a7c78b 214 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 215}
216
769d324c 217static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 218 assert(link);
219
5a8bcb67
LP		 220 if (link->flags & IFF_LOOPBACK)
221 return false;
222
223 if (!link->network)
224 return false;
225
2d792895 226 if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
765afd5c
LP		 227 return false;
228
e0ee46f2 229 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 230}
231
232static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 233 assert(link);
765afd5c
LP		 234
235 if (!socket_ipv6_is_supported())
236 return false;
237
769d324c
LP		 238 if (link->flags & IFF_LOOPBACK)
239 return false;
240
241 if (!link->network)
242 return false;
243
2d792895 244 if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
765afd5c
LP		 245 return false;
246
e0ee46f2 247 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 248}
249
23d8b221
SS		 250static bool link_proxy_arp_enabled(Link *link) {
251 assert(link);
252
253 if (link->flags & IFF_LOOPBACK)
254 return false;
255
256 if (!link->network)
257 return false;
258
259 if (link->network->proxy_arp < 0)
260 return false;
261
262 return true;
263}
264
b9d74c40
LP		 265static bool link_ipv6_accept_ra_enabled(Link *link) {
266 assert(link);
267
fa709992
LP		 268 if (!socket_ipv6_is_supported())
269 return false;
270
f5a8c43f
TG		 271 if (link->flags & IFF_LOOPBACK)
272 return false;
273
274 if (!link->network)
275 return false;
276
702c979f
SS		 277 if (!link_ipv6ll_enabled(link))
278 return false;
279
f5a8c43f
TG		 280 /* If unset use system default (enabled if local forwarding is disabled.
281 * disabled if local forwarding is enabled).
282 * If set, ignore or enforce RA independent of local forwarding state.
283 */
284 if (link->network->ipv6_accept_ra < 0)
285 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
286 return !link_ipv6_forward_enabled(link);
287 else if (link->network->ipv6_accept_ra > 0)
288 /* accept RA even if ip_forward is enabled */
289 return true;
290 else
291 /* ignore RA */
292 return false;
293}
294
1f0d9695 295static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 296 assert(link);
d68e2e59
LP		 297
298 if (!socket_ipv6_is_supported())
299 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
300
49092e22 301 if (link->flags & IFF_LOOPBACK)
1f0d9695 302 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 303
304 if (!link->network)
1f0d9695 305 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 306
307 return link->network->ipv6_privacy_extensions;
308}
309
57ad7607 310static int link_update_ipv6_sysctl(Link *link) {
482efedc 311 bool enabled;
439689c6
SS		 312 int r;
313
314 if (link->flags & IFF_LOOPBACK)
315 return 0;
316
482efedc
SS		 317 enabled = link_ipv6_enabled(link);
318 if (enabled) {
319 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", false);
320 if (r < 0)
57ad7607
ZJS		 321 return log_link_warning_errno(link, r, "Cannot enable IPv6: %m");
322
323 log_link_info(link, "IPv6 successfully enabled");
482efedc 324 }
439689c6
SS		 325
326 return 0;
327}
328
34bf3c00
YW		 329static bool link_is_enslaved(Link *link) {
330 if (link->flags & IFF_SLAVE)
331 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
332 return true;
333
34bf3c00
YW		 334 if (!link->network)
335 return false;
336
bb262ef0 337 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 338 return true;
339
bb262ef0
YW		 340 /* TODO: add conditions for other netdevs. */
341
34bf3c00
YW		 342 return false;
343}
344
45e11abf
YW		 345static void link_update_master_operstate(Link *link, NetDev *netdev) {
346 Link *master;
347
348 if (!netdev)
349 return;
350
7936917e
YW		 351 if (netdev->ifindex <= 0)
352 return;
353
45e11abf
YW		 354 if (link_get(link->manager, netdev->ifindex, &master) < 0)
355 return;
356
357 link_update_operstate(master, true);
358}
359
360void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 361 LinkOperationalState operstate;
1678fbb3
YW		 362 LinkCarrierState carrier_state;
363 LinkAddressState address_state;
35c5a9ca 364 _cleanup_strv_free_ char **p = NULL;
1678fbb3 365 uint8_t scope = RT_SCOPE_NOWHERE;
35c5a9ca 366 bool changed = false;
1678fbb3 367 Address *address;
45e11abf 368 Iterator i;
14153d1b 369
84de38c5
TG		 370 assert(link);
371
372 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 373 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 374 else if (link_has_carrier(link)) {
1678fbb3
YW		 375 if (link_is_enslaved(link))
376 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 377 else
1678fbb3 378 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 379 } else if (link->flags & IFF_UP)
1678fbb3 380 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 381 else
1678fbb3 382 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 383
1678fbb3 384 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 385 Link *slave;
386
5f707e12 387 SET_FOREACH(slave, link->slaves, i) {
959f65d3 388 link_update_operstate(slave, false);
84de38c5 389
1678fbb3
YW		 390 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
391 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 392 }
959f65d3 393 }
84de38c5 394
1678fbb3
YW		 395 SET_FOREACH(address, link->addresses, i) {
396 if (!address_is_ready(address))
397 continue;
84de38c5 398
1678fbb3
YW		 399 if (address->scope < scope)
400 scope = address->scope;
401 }
84de38c5 402
1678fbb3
YW		 403 /* for operstate we also take foreign addresses into account */
404 SET_FOREACH(address, link->addresses_foreign, i) {
405 if (!address_is_ready(address))
406 continue;
407
408 if (address->scope < scope)
409 scope = address->scope;
410 }
411
412 if (scope < RT_SCOPE_SITE)
413 /* universally accessible addresses found */
414 address_state = LINK_ADDRESS_STATE_ROUTABLE;
415 else if (scope < RT_SCOPE_HOST)
416 /* only link or site local addresses found */
417 address_state = LINK_ADDRESS_STATE_DEGRADED;
84de38c5 418 else
1678fbb3
YW		 419 /* no useful addresses found */
420 address_state = LINK_ADDRESS_STATE_OFF;
421
422 /* Mapping of address and carrier state vs operational state
423 * carrier state
424 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
425 * ------------------------------------------------------------------------------
426 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
427 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
428 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
429 */
84de38c5 430
1678fbb3
YW		 431 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
432 operstate = (LinkOperationalState) carrier_state;
433 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
434 operstate = LINK_OPERSTATE_ROUTABLE;
435 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
436 operstate = LINK_OPERSTATE_DEGRADED;
437 else
14153d1b
YW		 438 operstate = LINK_OPERSTATE_ENSLAVED;
439
35c5a9ca
YW		 440 if (link->carrier_state != carrier_state) {
441 link->carrier_state = carrier_state;
442 changed = true;
443 if (strv_extend(&p, "CarrierState") < 0)
444 log_oom();
445 }
959f65d3 446
35c5a9ca
YW		 447 if (link->address_state != address_state) {
448 link->address_state = address_state;
449 changed = true;
450 if (strv_extend(&p, "AddressState") < 0)
451 log_oom();
959f65d3
YW		 452 }
453
84de38c5
TG		 454 if (link->operstate != operstate) {
455 link->operstate = operstate;
35c5a9ca
YW		 456 changed = true;
457 if (strv_extend(&p, "OperationalState") < 0)
458 log_oom();
84de38c5 459 }
959f65d3 460
35c5a9ca
YW		 461 if (p)
462 link_send_changed_strv(link, p);
463 if (changed)
464 link_dirty(link);
465
45e11abf
YW		 466 if (also_update_master && link->network) {
467 link_update_master_operstate(link, link->network->bond);
468 link_update_master_operstate(link, link->network->bridge);
959f65d3 469 }
84de38c5
TG		 470}
471
51d18171
TG		 472#define FLAG_STRING(string, flag, old, new) \
473 (((old ^ new) & flag) \
474 ? ((old & flag) ? (" -" string) : (" +" string)) \
475 : "")
476
bb262ef0 477static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 478 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
479 uint8_t operstate;
480 int r;
481
482 assert(link);
483
484 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 485 if (r < 0)
486 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 487
1c4baffc 488 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 489 if (r < 0)
490 /* if we got a message without operstate, take it to mean
491 the state was unchanged */
492 operstate = link->kernel_operstate;
493
bb262ef0 494 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 495 return 0;
496
497 if (link->flags != flags) {
6a7a4e4d 498 log_link_debug(link, "Flags change:%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
51d18171
TG		 499 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
500 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
501 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
502 FLAG_STRING("UP", IFF_UP, link->flags, flags),
503 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
504 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
505 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
506 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
507 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
508 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
509 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
510 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
511 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
512 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
513 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
514 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
515 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
516 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
517 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
518
519 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
520 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
521 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
522 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
523 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
524 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
525 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
526 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
527
528 /* link flags are currently at most 18 bits, let's align to
529 * printing 20 */
530 if (unknown_flags_added)
79008bdd 531 log_link_debug(link,
6a7a4e4d 532 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 533 unknown_flags_added);
534
535 if (unknown_flags_removed)
79008bdd 536 log_link_debug(link,
6a7a4e4d 537 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 538 unknown_flags_removed);
539 }
540
541 link->flags = flags;
542 link->kernel_operstate = operstate;
543
959f65d3 544 link_update_operstate(link, true);
51d18171
TG		 545
546 return 0;
547}
548
1c4baffc 549static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 550 _cleanup_(link_unrefp) Link *link = NULL;
6cad256d 551 const char *ifname, *kind = NULL;
b710e6b6 552 unsigned short iftype;
572b21d9
YW		 553 int r, ifindex;
554 uint16_t type;
f579559b 555
0c2f9b84 556 assert(manager);
505f8da7 557 assert(message);
f579559b
TG		 558 assert(ret);
559
6cad256d
TJ		 560 /* check for link kind */
561 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
562 if (r == 0) {
db2f8a2e 563 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 564 r = sd_netlink_message_exit_container(message);
565 if (r < 0)
566 return r;
567 }
568
1c4baffc 569 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 570 if (r < 0)
571 return r;
572 else if (type != RTM_NEWLINK)
573 return -EINVAL;
574
575 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
576 if (r < 0)
577 return r;
578 else if (ifindex <= 0)
579 return -EINVAL;
580
b710e6b6
LP		 581 r = sd_rtnl_message_link_get_type(message, &iftype);
582 if (r < 0)
583 return r;
584
1c4baffc 585 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 586 if (r < 0)
587 return r;
588
17f9c355 589 link = new(Link, 1);
f579559b
TG		 590 if (!link)
591 return -ENOMEM;
592
17f9c355
YW		 593 *link = (Link) {
594 .n_ref = 1,
595 .manager = manager,
596 .state = LINK_STATE_PENDING,
17f9c355
YW		 597 .ifindex = ifindex,
598 .iftype = iftype,
15761549
YW		 599
600 .n_dns = (unsigned) -1,
601 .dns_default_route = -1,
602 .llmnr = _RESOLVE_SUPPORT_INVALID,
603 .mdns = _RESOLVE_SUPPORT_INVALID,
604 .dnssec_mode = _DNSSEC_MODE_INVALID,
605 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
17f9c355
YW		 606 };
607
505f8da7
TG		 608 link->ifname = strdup(ifname);
609 if (!link->ifname)
610 return -ENOMEM;
f579559b 611
6cad256d
TJ		 612 if (kind) {
613 link->kind = strdup(kind);
614 if (!link->kind)
615 return -ENOMEM;
616 }
617
cbff7170
TJ		 618 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
619 if (r < 0)
620 log_link_debug_errno(link, r, "New device has no master, continuing without");
621
1c4baffc 622 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 623 if (r < 0)
34437b4f 624 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 625
c643bda5 626 r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac);
4bb7cc82
YW		 627 if (r < 0)
628 log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
629
c643bda5
YW		 630 r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver);
631 if (r < 0)
632 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
633
572b21d9
YW		 634 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &link->alternative_names);
635 if (r < 0 && r != -ENODATA)
636 return r;
637
34437b4f 638 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 639 return -ENOMEM;
fe8db0c5 640
34437b4f 641 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 642 return -ENOMEM;
643
34437b4f 644 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 645 return -ENOMEM;
646
d5099efc 647 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 648 if (r < 0)
649 return r;
650
651 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 652 if (r < 0)
653 return r;
654
bb262ef0 655 r = link_update_flags(link, message, false);
51d18171
TG		 656 if (r < 0)
657 return r;
658
1cc6c93a 659 *ret = TAKE_PTR(link);
f579559b
TG		 660
661 return 0;
662}
663
15761549
YW		 664void link_ntp_settings_clear(Link *link) {
665 link->ntp = strv_free(link->ntp);
666}
667
668void link_dns_settings_clear(Link *link) {
669 link->dns = mfree(link->dns);
670 link->n_dns = (unsigned) -1;
671
672 link->search_domains = ordered_set_free_free(link->search_domains);
673 link->route_domains = ordered_set_free_free(link->route_domains);
674
675 link->dns_default_route = -1;
676 link->llmnr = _RESOLVE_SUPPORT_INVALID;
677 link->mdns = _RESOLVE_SUPPORT_INVALID;
678 link->dnssec_mode = _DNSSEC_MODE_INVALID;
679 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
680
681 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
682}
683
1a6bb31f
YW		 684static void link_free_engines(Link *link) {
685 if (!link)
686 return;
687
688 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
689 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
690 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
691 link->dhcp_routes = set_free(link->dhcp_routes);
692
693 link->lldp = sd_lldp_unref(link->lldp);
694
695 ndisc_flush(link);
696
697 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
698 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
699 link->ndisc = sd_ndisc_unref(link->ndisc);
700 link->radv = sd_radv_unref(link->radv);
701}
702
8301aa0b 703static Link *link_free(Link *link) {
428fd0a7
TG		 704 Address *address;
705
8301aa0b 706 assert(link);
f579559b 707
15761549
YW		 708 link_ntp_settings_clear(link);
709 link_dns_settings_clear(link);
710
f535e354
YW		 711 link->routes = set_free_with_destructor(link->routes, route_free);
712 link->routes_foreign = set_free_with_destructor(link->routes_foreign, route_free);
adda1ed9 713
c16c7808
SS		 714 link->nexthops = set_free_with_destructor(link->nexthops, nexthop_free);
715 link->nexthops_foreign = set_free_with_destructor(link->nexthops_foreign, nexthop_free);
716
d1bdafd2
WKI		 717 link->neighbors = set_free_with_destructor(link->neighbors, neighbor_free);
718 link->neighbors_foreign = set_free_with_destructor(link->neighbors_foreign, neighbor_free);
719
f535e354
YW		 720 link->addresses = set_free_with_destructor(link->addresses, address_free);
721 link->addresses_foreign = set_free_with_destructor(link->addresses_foreign, address_free);
adda1ed9 722
11bf3cce
LP		 723 while ((address = link->pool_addresses)) {
724 LIST_REMOVE(addresses, link->pool_addresses, address);
725 address_free(address);
726 }
727
7272b25e 728 link_lldp_emit_stop(link);
1a6bb31f 729 link_free_engines(link);
68a8723c 730 free(link->lease_file);
49699bac
SS		 731 free(link->lldp_file);
732
c166a070 733 free(link->ifname);
572b21d9 734 strv_free(link->alternative_names);
ceac4078 735 free(link->kind);
8d968fdd 736 free(link->ssid);
c643bda5 737 free(link->driver);
6cad256d 738
db2f8a2e 739 (void) unlink(link->state_file);
fe8db0c5 740 free(link->state_file);
c166a070 741
51517f9e 742 sd_device_unref(link->sd_device);
b5db00e5 743
0d4ad91d 744 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 745 hashmap_free(link->bound_by_links);
746
5f707e12 747 set_free_with_destructor(link->slaves, link_unref);
033295c1 748
c9c908a6
YW		 749 network_unref(link->network);
750
8301aa0b 751 return mfree(link);
14b746f7
TG		 752}
753
8301aa0b 754DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 755
11a7f229
TG		 756int link_get(Manager *m, int ifindex, Link **ret) {
757 Link *link;
11a7f229
TG		 758
759 assert(m);
e856ed00 760 assert(ifindex > 0);
11a7f229
TG		 761 assert(ret);
762
ae06ab10 763 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 764 if (!link)
765 return -ENODEV;
766
767 *ret = link;
768
769 return 0;
770}
771
af9ba57a 772void link_set_state(Link *link, LinkState state) {
e331e246
TG		 773 assert(link);
774
775 if (link->state == state)
776 return;
777
0beb9542
YW		 778 log_link_debug(link, "State changed: %s -> %s",
779 link_state_to_string(link->state),
780 link_state_to_string(state));
781
e331e246
TG		 782 link->state = state;
783
784 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 785}
786
57bd6899
TG		 787static void link_enter_unmanaged(Link *link) {
788 assert(link);
789
e331e246 790 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 791
84de38c5 792 link_dirty(link);
57bd6899
TG		 793}
794
95355a28 795int link_stop_clients(Link *link, bool may_keep_dhcp) {
111bb8f9 796 int r = 0, k;
051e77ca 797 Address *ad;
111bb8f9
TG		 798
799 assert(link);
800 assert(link->manager);
801 assert(link->manager->event);
802
d03073dd
YW		 803 dhcp4_release_old_lease(link);
804
80060352
ZJS		 805 bool keep_dhcp = may_keep_dhcp &&
806 link->network &&
807 (link->manager->restarting ||
808 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
809
810 if (link->dhcp_client && !keep_dhcp) {
111bb8f9 811 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 812 if (k < 0)
36c7d709 813 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 814 }
815
ba179154 816 if (link->ipv4ll) {
111bb8f9 817 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 818 if (k < 0)
36c7d709 819 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 820 }
821
051e77ca
SS		 822 if (link->network)
823 LIST_FOREACH(addresses, ad, link->network->static_addresses)
824 if (ad->acd && sd_ipv4acd_is_running(ad->acd) == 0) {
825 k = sd_ipv4acd_stop(ad->acd);
826 if (k < 0)
827 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
828 }
829
f5a8c43f
TG		 830 if (link->dhcp6_client) {
831 k = sd_dhcp6_client_stop(link->dhcp6_client);
832 if (k < 0)
36c7d709 833 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 834 }
4138fb2c 835
1e7a0e21
LP		 836 if (link->ndisc) {
837 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 838 if (k < 0)
36c7d709 839 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 840 }
841
7465dd22 842 if (link->radv) {
290696e5 843 k = sd_radv_stop(link->radv);
7465dd22
PF		 844 if (k < 0)
845 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
846 }
847
7272b25e 848 link_lldp_emit_stop(link);
111bb8f9
TG		 849 return r;
850}
851
b22d8a00 852void link_enter_failed(Link *link) {
ef1ba606 853 assert(link);
f882c247 854
370e9930 855 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 856 return;
857
6a7a4e4d 858 log_link_warning(link, "Failed");
449f7554 859
e331e246 860 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 861
95355a28 862 link_stop_clients(link, false);
111bb8f9 863
84de38c5 864 link_dirty(link);
f882c247
TG		 865}
866
7033af49
YW		 867static int link_join_netdevs_after_configured(Link *link) {
868 NetDev *netdev;
869 Iterator i;
870 int r;
871
872 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
873 if (netdev->ifindex > 0)
874 /* Assume already enslaved. */
875 continue;
876
877 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
878 continue;
879
880 log_struct(LOG_DEBUG,
881 LOG_LINK_INTERFACE(link),
882 LOG_NETDEV_INTERFACE(netdev),
883 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
884
885 r = netdev_join(netdev, link, NULL);
886 if (r < 0)
887 return log_struct_errno(LOG_WARNING, r,
888 LOG_LINK_INTERFACE(link),
889 LOG_NETDEV_INTERFACE(netdev),
890 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
891 }
892
893 return 0;
894}
895
e3a7b048 896static void link_enter_configured(Link *link) {
dd43110f
TG		 897 assert(link);
898 assert(link->network);
e3a7b048 899
289e6774 900 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 901 return;
dd43110f 902
e331e246 903 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 904
7033af49
YW		 905 (void) link_join_netdevs_after_configured(link);
906
84de38c5 907 link_dirty(link);
dd43110f
TG		 908}
909
47079967 910static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 911 RoutingPolicyRule *rule, *rrule = NULL;
912 int r;
913
914 assert(link);
915 assert(link->network);
916
2428613f
YW		 917 link->routing_policy_rules_configured = false;
918
8a9b3a23 919 LIST_FOREACH(rules, rule, link->network->rules) {
b80a511b 920 r = routing_policy_rule_get(link->manager, rule, &rrule);
ff14e2eb
YW		 921 if (r >= 0) {
922 if (r == 0)
923 (void) routing_policy_rule_make_local(link->manager, rrule);
8a9b3a23
SS		 924 continue;
925 }
926
9f08a578 927 r = routing_policy_rule_configure(rule, link, NULL);
4ff296b0
YW		 928 if (r < 0)
929 return log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
7ef7e550
YW		 930 if (r > 0)
931 link->routing_policy_rule_messages++;
8a9b3a23
SS		 932 }
933
934 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 935 if (link->routing_policy_rule_messages == 0) {
936 link->routing_policy_rules_configured = true;
937 link_check_ready(link);
b425c3ae 938 } else {
7715629e 939 log_link_debug(link, "Setting routing policy rules");
b425c3ae
YW		 940 link_set_state(link, LINK_STATE_CONFIGURING);
941 }
8a9b3a23
SS		 942
943 return 0;
944}
945
c16c7808
SS		 946static int nexthop_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
947 int r;
948
949 assert(link);
950 assert(link->nexthop_messages > 0);
951 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
952 LINK_STATE_FAILED, LINK_STATE_LINGER));
953
954 link->nexthop_messages--;
955
956 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
957 return 1;
958
959 r = sd_netlink_message_get_errno(m);
960 if (r < 0 && r != -EEXIST) {
5ecb131d 961 log_link_message_warning_errno(link, m, r, "Could not set nexthop");
c16c7808
SS		 962 link_enter_failed(link);
963 return 1;
964 }
965
966 if (link->nexthop_messages == 0) {
967 log_link_debug(link, "Nexthop set");
968 link->static_nexthops_configured = true;
969 link_check_ready(link);
970 }
971
972 return 1;
973}
974
eb01a2df 975static int link_request_set_nexthop(Link *link) {
c16c7808
SS		 976 NextHop *nh;
977 int r;
978
979 LIST_FOREACH(nexthops, nh, link->network->static_nexthops) {
980 r = nexthop_configure(nh, link, nexthop_handler);
981 if (r < 0)
982 return log_link_warning_errno(link, r, "Could not set nexthop: %m");
983 if (r > 0)
984 link->nexthop_messages++;
985 }
986
987 if (link->nexthop_messages == 0) {
988 link->static_nexthops_configured = true;
989 link_check_ready(link);
990 } else {
991 log_link_debug(link, "Setting nexthop");
992 link_set_state(link, LINK_STATE_CONFIGURING);
993 }
994
995 return 1;
996}
997
302a796f 998static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 999 int r;
1000
1046bf9b 1001 assert(link);
7715629e 1002 assert(link->route_messages > 0);
289e6774
WKI		 1003 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
1004 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1005
7715629e 1006 link->route_messages--;
f882c247 1007
77a008c0 1008 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1009 return 1;
1010
1c4baffc 1011 r = sd_netlink_message_get_errno(m);
4ff296b0 1012 if (r < 0 && r != -EEXIST) {
5ecb131d 1013 log_link_message_warning_errno(link, m, r, "Could not set route");
4ff296b0
YW		 1014 link_enter_failed(link);
1015 return 1;
1016 }
f882c247 1017
7715629e 1018 if (link->route_messages == 0) {
6a7a4e4d 1019 log_link_debug(link, "Routes set");
7715629e 1020 link->static_routes_configured = true;
8012cd39 1021 link_check_ready(link);
dd3efc09 1022 }
f882c247
TG		 1023
1024 return 1;
1025}
1026
b5799eeb 1027int link_request_set_routes(Link *link) {
bf61b05a
LP		 1028 enum {
1029 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
1030 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
1031 _PHASE_MAX
1032 } phase;
a6cc569e 1033 Route *rt;
f882c247
TG		 1034 int r;
1035
1036 assert(link);
1037 assert(link->network);
c42ff3a1
WKI		 1038 assert(link->addresses_configured);
1039 assert(link->address_messages == 0);
289e6774 1040 assert(link->state != _LINK_STATE_INVALID);
f882c247 1041
2428613f 1042 link->static_routes_configured = false;
c16c7808 1043 link->static_routes_ready = false;
27c34f73 1044
4e2ef9d9
YW		 1045 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
1046 /* During configuring addresses, the link lost its carrier. As networkd is dropping
1047 * the addresses now, let's not configure the routes either. */
1048 return 0;
1049
47079967 1050 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 1051 if (r < 0)
1052 return r;
f882c247 1053
bf61b05a
LP		 1054 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
1055 for (phase = 0; phase < _PHASE_MAX; phase++)
1056 LIST_FOREACH(routes, rt, link->network->static_routes) {
1985c54f
YW		 1057 if (rt->gateway_from_dhcp)
1058 continue;
0d34228f 1059
6ff5cc6b 1060 if ((in_addr_is_null(rt->family, &rt->gw) && ordered_set_isempty(rt->multipath_routes)) != (phase == PHASE_NON_GATEWAY))
bf61b05a 1061 continue;
a6cc569e 1062
0d34228f 1063 r = route_configure(rt, link, route_handler);
4ff296b0
YW		 1064 if (r < 0)
1065 return log_link_warning_errno(link, r, "Could not set routes: %m");
c4423317
YW		 1066 if (r > 0)
1067 link->route_messages++;
0d34228f 1068 }
f5be5601 1069
7715629e
ST		 1070 if (link->route_messages == 0) {
1071 link->static_routes_configured = true;
8012cd39 1072 link_check_ready(link);
b425c3ae 1073 } else {
6a7a4e4d 1074 log_link_debug(link, "Setting routes");
b425c3ae
YW		 1075 link_set_state(link, LINK_STATE_CONFIGURING);
1076 }
f882c247
TG		 1077
1078 return 0;
1079}
1080
6accfd31
DA		 1081void link_check_ready(Link *link) {
1082 Address *a;
1083 Iterator i;
4ff296b0 1084 int r;
6accfd31
DA		 1085
1086 assert(link);
1087
39373cb9
YW		 1088 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) {
1089 log_link_debug(link, "%s(): link is in failed or linger state.", __func__);
6accfd31 1090 return;
39373cb9 1091 }
6accfd31
DA		 1092
1093 if (!link->network)
1094 return;
1095
39373cb9
YW		 1096 if (!link->addresses_configured) {
1097 log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 1098 return;
39373cb9 1099 }
6accfd31 1100
39373cb9
YW		 1101 if (!link->neighbors_configured) {
1102 log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
6accfd31 1103 return;
39373cb9 1104 }
6accfd31 1105
6aa5773b 1106 SET_FOREACH(a, link->addresses, i)
39373cb9
YW		 1107 if (!address_is_ready(a)) {
1108 _cleanup_free_ char *str = NULL;
1109
1110 (void) in_addr_to_string(a->family, &a->in_addr, &str);
1111 log_link_debug(link, "%s(): an address %s/%d is not ready.", __func__, strnull(str), a->prefixlen);
6aa5773b 1112 return;
39373cb9 1113 }
6aa5773b
DA		 1114
1115 if (!link->addresses_ready) {
1116 link->addresses_ready = true;
4ff296b0
YW		 1117 r = link_request_set_routes(link);
1118 if (r < 0)
1119 link_enter_failed(link);
39373cb9 1120 log_link_debug(link, "%s(): static addresses are configured. Configuring static routes.", __func__);
710ce9e5 1121 return;
6aa5773b
DA		 1122 }
1123
39373cb9
YW		 1124 if (!link->static_routes_configured) {
1125 log_link_debug(link, "%s(): static routes are not configured.", __func__);
6accfd31 1126 return;
39373cb9 1127 }
6accfd31 1128
c16c7808
SS		 1129 if (!link->static_routes_ready) {
1130 link->static_routes_ready = true;
1131 r = link_request_set_nexthop(link);
1132 if (r < 0)
1133 link_enter_failed(link);
39373cb9 1134 log_link_debug(link, "%s(): static routes are configured. Configuring static nexthops.", __func__);
c16c7808
SS		 1135 return;
1136 }
1137
39373cb9
YW		 1138 if (!link->static_nexthops_configured) {
1139 log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 1140 return;
39373cb9 1141 }
c16c7808 1142
39373cb9
YW		 1143 if (!link->routing_policy_rules_configured) {
1144 log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 1145 return;
39373cb9 1146 }
6accfd31 1147
39373cb9
YW		 1148 if (!link->tc_configured) {
1149 log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
4ecdcb07 1150 return;
39373cb9 1151 }
4ecdcb07 1152
39373cb9
YW		 1153 if (!link->sr_iov_configured) {
1154 log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 1155 return;
39373cb9 1156 }
518cd6b5 1157
463797c1 1158 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
6accfd31 1159
39373cb9
YW		 1160 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !link->ipv4ll_address) {
1161 log_link_debug(link, "%s(): IPv4LL is not configured.", __func__);
463797c1 1162 return;
39373cb9 1163 }
6accfd31 1164
463797c1 1165 if (link_ipv6ll_enabled(link) &&
39373cb9
YW		 1166 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
1167 log_link_debug(link, "%s(): IPv6LL is not configured.", __func__);
463797c1 1168 return;
39373cb9 1169 }
6accfd31 1170
39373cb9
YW		 1171 if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || dhcp6_get_prefix_delegation(link) || link_ipv6_accept_ra_enabled(link)) {
1172 if (!link->dhcp4_configured &&
1173 !(link->dhcp6_address_configured && link->dhcp6_route_configured) &&
1174 !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) &&
d98c546d 1175 !(link->ndisc_addresses_configured && link->ndisc_routes_configured) &&
39373cb9
YW		 1176 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address)) {
1177 /* When DHCP or RA is enabled, at least one protocol must provide an address, or
1178 * an IPv4ll fallback address must be configured. */
1179 log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
1180 return;
1181 }
1182
d98c546d 1183 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		 1184 __func__,
1185 yes_no(link->dhcp4_configured),
1186 yes_no(link->dhcp6_address_configured),
1187 yes_no(link->dhcp6_route_configured),
1188 yes_no(link->dhcp6_pd_address_configured),
1189 yes_no(link->dhcp6_pd_route_configured),
d98c546d
YW		 1190 yes_no(link->ndisc_addresses_configured),
1191 yes_no(link->ndisc_routes_configured));
39373cb9 1192 }
463797c1 1193 }
6accfd31 1194
6accfd31
DA		 1195 if (link->state != LINK_STATE_CONFIGURED)
1196 link_enter_configured(link);
1197
1198 return;
1199}
1200
e4a71bf3
WKI		 1201static int link_request_set_neighbors(Link *link) {
1202 Neighbor *neighbor;
1203 int r;
1204
1205 assert(link);
1206 assert(link->network);
1207 assert(link->state != _LINK_STATE_INVALID);
1208
2428613f 1209 link->neighbors_configured = false;
e4a71bf3
WKI		 1210
1211 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
1212 r = neighbor_configure(neighbor, link, NULL);
4ff296b0
YW		 1213 if (r < 0)
1214 return log_link_warning_errno(link, r, "Could not set neighbor: %m");
e4a71bf3
WKI		 1215 }
1216
1217 if (link->neighbor_messages == 0) {
1218 link->neighbors_configured = true;
1219 link_check_ready(link);
b425c3ae 1220 } else {
e4a71bf3 1221 log_link_debug(link, "Setting neighbors");
b425c3ae
YW		 1222 link_set_state(link, LINK_STATE_CONFIGURING);
1223 }
e4a71bf3
WKI		 1224
1225 return 0;
1226}
1227
3650173f 1228static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1229 int r;
1230
4958aee4 1231 assert(rtnl);
f5be5601
TG		 1232 assert(m);
1233 assert(link);
1234 assert(link->ifname);
7715629e 1235 assert(link->address_messages > 0);
289e6774 1236 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1237 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1238
7715629e 1239 link->address_messages--;
f882c247 1240
5da8149f 1241 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1242 return 1;
1243
1c4baffc 1244 r = sd_netlink_message_get_errno(m);
4ff296b0 1245 if (r < 0 && r != -EEXIST) {
5ecb131d 1246 log_link_message_warning_errno(link, m, r, "Could not set address");
4ff296b0
YW		 1247 link_enter_failed(link);
1248 return 1;
1249 } else if (r >= 0)
1250 (void) manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1251
7715629e 1252 if (link->address_messages == 0) {
6a7a4e4d 1253 log_link_debug(link, "Addresses set");
c42ff3a1 1254 link->addresses_configured = true;
6aa5773b 1255 link_check_ready(link);
dd3efc09 1256 }
f882c247
TG		 1257
1258 return 1;
1259}
1260
f6bb7ac5
TJ		 1261static int link_set_bridge_fdb(Link *link) {
1262 FdbEntry *fdb_entry;
197e2809 1263 int r;
f6bb7ac5
TJ		 1264
1265 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1266 r = fdb_entry_configure(link, fdb_entry);
197e2809 1267 if (r < 0)
f6bb7ac5 1268 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1269 }
1270
197e2809 1271 return 0;
f6bb7ac5
TJ		 1272}
1273
289e6774 1274static int link_request_set_addresses(Link *link) {
95b74ef6 1275 AddressLabel *label;
a6cc569e 1276 Address *ad;
bd6379ec 1277 Prefix *p;
f882c247
TG		 1278 int r;
1279
1280 assert(link);
1281 assert(link->network);
f5be5601 1282 assert(link->state != _LINK_STATE_INVALID);
f882c247 1283
2428613f
YW		 1284 /* Reset all *_configured flags we are configuring. */
1285 link->addresses_configured = false;
6aa5773b 1286 link->addresses_ready = false;
2428613f
YW		 1287 link->neighbors_configured = false;
1288 link->static_routes_configured = false;
c16c7808
SS		 1289 link->static_routes_ready = false;
1290 link->static_nexthops_configured = false;
2428613f
YW		 1291 link->routing_policy_rules_configured = false;
1292
f6bb7ac5
TJ		 1293 r = link_set_bridge_fdb(link);
1294 if (r < 0)
1295 return r;
1296
f3ef324d
YW		 1297 r = link_request_set_neighbors(link);
1298 if (r < 0)
1299 return r;
e4a71bf3 1300
3d3d4255 1301 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1302 bool update;
1303
1304 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1305
1306 r = address_configure(ad, link, address_handler, update);
4ff296b0
YW		 1307 if (r < 0)
1308 return log_link_warning_errno(link, r, "Could not set addresses: %m");
54a1a535
YW		 1309 if (r > 0)
1310 link->address_messages++;
95b74ef6
SS		 1311 }
1312
bd6379ec
SS		 1313 if (IN_SET(link->network->router_prefix_delegation,
1314 RADV_PREFIX_DELEGATION_STATIC,
1315 RADV_PREFIX_DELEGATION_BOTH))
1316 LIST_FOREACH(prefixes, p, link->network->static_prefixes) {
1317 _cleanup_(address_freep) Address *address = NULL;
1318
1319 if (!p->assign)
1320 continue;
1321
1322 r = address_new(&address);
1323 if (r < 0)
1324 return log_link_error_errno(link, r, "Could not allocate address: %m");
1325
1326 r = sd_radv_prefix_get_prefix(p->radv_prefix, &address->in_addr.in6, &address->prefixlen);
1327 if (r < 0)
1328 return r;
1329
1330 r = generate_ipv6_eui_64_address(link, &address->in_addr.in6);
1331 if (r < 0)
1332 return r;
1333
1334 address->family = AF_INET6;
1335 r = address_configure(address, link, address_handler, true);
1336 if (r < 0)
1337 return log_link_warning_errno(link, r, "Could not set addresses: %m");
1338 if (r > 0)
1339 link->address_messages++;
1340 }
1341
95b74ef6 1342 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1343 r = address_label_configure(label, link, NULL, false);
4ff296b0
YW		 1344 if (r < 0)
1345 return log_link_warning_errno(link, r, "Could not set address label: %m");
f5be5601 1346
7715629e 1347 link->address_label_messages++;
f882c247
TG		 1348 }
1349
d4cdbea5
TG		 1350 /* now that we can figure out a default address for the dhcp server,
1351 start it */
708c425d 1352 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
8fcf1d61 1353 r = dhcp4_server_configure(link);
4ff296b0 1354 if (r < 0)
d4cdbea5 1355 return r;
6a7a4e4d 1356 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1357 }
1358
c42ff3a1
WKI		 1359 if (link->address_messages == 0) {
1360 link->addresses_configured = true;
6aa5773b 1361 link_check_ready(link);
b425c3ae 1362 } else {
6a7a4e4d 1363 log_link_debug(link, "Setting addresses");
b425c3ae
YW		 1364 link_set_state(link, LINK_STATE_CONFIGURING);
1365 }
431ca2ce 1366
f882c247
TG		 1367 return 0;
1368}
1369
13b498f9 1370static int link_set_bridge_vlan(Link *link) {
86e2be7b 1371 int r;
13b498f9
TJ		 1372
1373 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1374 if (r < 0)
1375 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1376
1377 return r;
1378}
1379
a60a720c 1380static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1381 int r;
1382
1383 if (!link_proxy_arp_enabled(link))
1384 return 0;
1385
62e021a9 1386 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1387 if (r < 0)
1388 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1389
1390 return 0;
1391}
1392
3a390124 1393static int link_configure_continue(Link *link);
55dc8c4a 1394
302a796f 1395static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1396 int r;
1397
1398 assert(m);
1399 assert(link);
1400 assert(link->ifname);
1401
55dc8c4a
YW		 1402 link->setting_mtu = false;
1403
5da8149f 1404 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1405 return 1;
1406
1c4baffc 1407 r = sd_netlink_message_get_errno(m);
4ff296b0 1408 if (r < 0)
5ecb131d 1409 log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring");
4ff296b0
YW		 1410 else
1411 log_link_debug(link, "Setting MTU done.");
55dc8c4a 1412
4ff296b0 1413 if (link->state == LINK_STATE_INITIALIZED) {
3a390124 1414 r = link_configure_continue(link);
4ff296b0
YW		 1415 if (r < 0)
1416 link_enter_failed(link);
1417 }
4f882b2a
TG		 1418
1419 return 1;
1420}
1421
933c70a0 1422int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1423 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1424 int r;
1425
1426 assert(link);
1427 assert(link->manager);
1428 assert(link->manager->rtnl);
1429
40288ece
YW		 1430 if (mtu == 0 || link->setting_mtu)
1431 return 0;
1432
933c70a0 1433 if (link->mtu == mtu)
ee493106
YW		 1434 return 0;
1435
6a7a4e4d 1436 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1437
6a7a4e4d
LP		 1438 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1439 if (r < 0)
1440 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1441
44b598a1 1442 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1443 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1444 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1445
1446 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
d236718c 1447 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes");
44b598a1 1448
72c2500b 1449 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1450 }
1451
1c4baffc 1452 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1453 if (r < 0)
1454 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1455
302a796f
YW		 1456 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1457 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1458 if (r < 0)
1459 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1460
ae941762 1461 link_ref(link);
1046bf9b 1462 link->setting_mtu = true;
b226d99b 1463
4f882b2a
TG		 1464 return 0;
1465}
1466
f6fcc1c2
YW		 1467static bool link_reduces_vlan_mtu(Link *link) {
1468 /* See netif_reduces_vlan_mtu() in kernel. */
1469 return streq_ptr(link->kind, "macsec");
1470}
1471
1472static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1473 uint32_t mtu = 0;
1474 NetDev *dev;
1475 Iterator i;
1476
1477 HASHMAP_FOREACH(dev, link->network->stacked_netdevs, i)
1478 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1479 /* See vlan_dev_change_mtu() in kernel. */
1480 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1481
1482 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1483 /* See macvlan_change_mtu() in kernel. */
1484 mtu = dev->mtu;
1485
1486 return mtu;
1487}
1488
1489static int link_configure_mtu(Link *link) {
1490 uint32_t mtu;
1491
1492 assert(link);
1493 assert(link->network);
1494
1495 if (link->network->mtu > 0)
1496 return link_set_mtu(link, link->network->mtu);
1497
1498 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1499 if (link->mtu >= mtu)
1500 return 0;
1501
1502 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1503 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1504 link->mtu, mtu);
1505
1506 return link_set_mtu(link, mtu);
1507}
1508
302a796f 1509static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1510 int r;
1511
1512 assert(m);
1513 assert(link);
1514 assert(link->ifname);
1515
1516 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1517 return 1;
1518
1519 r = sd_netlink_message_get_errno(m);
1520 if (r < 0)
5ecb131d 1521 log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring");
99d2baa2
SS		 1522
1523 return 1;
1524}
1525
1526static int link_set_flags(Link *link) {
1527 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1528 unsigned ifi_change = 0;
1529 unsigned ifi_flags = 0;
1530 int r;
1531
1532 assert(link);
1533 assert(link->manager);
1534 assert(link->manager->rtnl);
1535
1536 if (link->flags & IFF_LOOPBACK)
1537 return 0;
1538
1539 if (!link->network)
1540 return 0;
1541
866e6b7a 1542 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1543 return 0;
1544
1545 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1546 if (r < 0)
1547 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1548
1549 if (link->network->arp >= 0) {
1550 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1551 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1552 }
1553
1554 if (link->network->multicast >= 0) {
1555 ifi_change |= IFF_MULTICAST;
1556 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1557 }
1558
866e6b7a
SS		 1559 if (link->network->allmulticast >= 0) {
1560 ifi_change |= IFF_ALLMULTI;
1561 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1562 }
1563
99d2baa2
SS		 1564 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1565 if (r < 0)
1566 return log_link_error_errno(link, r, "Could not set link flags: %m");
1567
302a796f
YW		 1568 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1569 link_netlink_destroy_callback, link);
99d2baa2
SS		 1570 if (r < 0)
1571 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1572
1573 link_ref(link);
1574
1575 return 0;
1576}
1577
e7ab854c
TG		 1578static int link_acquire_ipv6_conf(Link *link) {
1579 int r;
1580
1581 assert(link);
1582
e7ab854c 1583 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1584 assert(link->ndisc);
e7ab854c
TG		 1585
1586 log_link_debug(link, "Discovering IPv6 routers");
1587
1e7a0e21 1588 r = sd_ndisc_start(link->ndisc);
63348d13 1589 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1590 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1591 }
1592
7465dd22
PF		 1593 if (link_radv_enabled(link)) {
1594 assert(link->radv);
1595 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1596
1597 log_link_debug(link, "Starting IPv6 Router Advertisements");
1598
fd3ef936
YW		 1599 r = radv_emit_dns(link);
1600 if (r < 0)
1601 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
1602
7465dd22
PF		 1603 r = sd_radv_start(link->radv);
1604 if (r < 0 && r != -EBUSY)
1605 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1606 }
1607
838d39af
SS		 1608 if (link_dhcp6_enabled(link) && IN_SET(link->network->dhcp6_without_ra,
1609 DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST,
1610 DHCP6_CLIENT_START_MODE_SOLICIT)) {
cd305af1
SS		 1611 assert(link->dhcp6_client);
1612 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1613
838d39af 1614 r = dhcp6_request_address(link, link->network->dhcp6_without_ra == DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST);
cd305af1
SS		 1615 if (r < 0 && r != -EBUSY)
1616 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
1617 else
1618 log_link_debug(link, "Acquiring DHCPv6 lease");
1619 }
1620
10752343
PF		 1621 (void) dhcp6_request_prefix_delegation(link);
1622
e7ab854c
TG		 1623 return 0;
1624}
1625
6fc25497 1626static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1627 int r;
1628
1629 assert(link);
ff254138
TG		 1630 assert(link->manager);
1631 assert(link->manager->event);
1632
910feb78 1633 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1634 assert(link->ipv4ll);
ff254138 1635
6a7a4e4d 1636 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1637
1638 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1639 if (r < 0)
1640 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1641 }
1642
78c958f8 1643 if (link_dhcp4_enabled(link)) {
eb34d4af 1644 assert(link->dhcp_client);
ff254138 1645
6a7a4e4d 1646 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1647
5c1d3fc9 1648 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1649 if (r < 0)
1650 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1651 }
ff254138 1652
6fc25497
SS		 1653 return 0;
1654}
1655
1656static int link_acquire_conf(Link *link) {
1657 int r;
1658
1659 assert(link);
1660
1661 r = link_acquire_ipv4_conf(link);
1662 if (r < 0)
1663 return r;
1664
3f7cc080 1665 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1666 r = link_acquire_ipv6_conf(link);
1667 if (r < 0)
1668 return r;
1669 }
1670
7272b25e
LP		 1671 if (link_lldp_emit_enabled(link)) {
1672 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1673 if (r < 0)
1674 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1675 }
1676
ff254138
TG		 1677 return 0;
1678}
1679
a61bb41c 1680bool link_has_carrier(Link *link) {
deb2e523
TG		 1681 /* see Documentation/networking/operstates.txt in the kernel sources */
1682
a61bb41c 1683 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1684 return true;
1685
a61bb41c 1686 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1687 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1688 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1689 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1690 return true;
1691
1692 return false;
1693}
1694
0e2fdb83
SS		 1695static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1696 int r;
1697
1698 assert(link);
1699
9524014e
DS		 1700 link->setting_genmode = false;
1701
0e2fdb83
SS		 1702 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1703 return 1;
1704
1705 r = sd_netlink_message_get_errno(m);
1706 if (r < 0)
5ecb131d 1707 log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring");
9524014e
DS		 1708 else
1709 log_link_debug(link, "Setting address genmode done.");
1710
1711 if (link->state == LINK_STATE_INITIALIZED) {
1712 r = link_configure_continue(link);
1713 if (r < 0)
1714 link_enter_failed(link);
1715 }
0e2fdb83
SS		 1716
1717 return 1;
1718}
1719
1720static int link_configure_addrgen_mode(Link *link) {
1721 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1722 uint8_t ipv6ll_mode;
1723 int r;
1724
1725 assert(link);
1726 assert(link->network);
1727 assert(link->manager);
1728 assert(link->manager->rtnl);
1729
9524014e 1730 if (!socket_ipv6_is_supported() || link->setting_genmode)
9f6e82e6
YW		 1731 return 0;
1732
0e2fdb83
SS		 1733 log_link_debug(link, "Setting address genmode for link");
1734
1735 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1736 if (r < 0)
1737 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1738
1739 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1740 if (r < 0)
1741 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1742
1743 r = sd_netlink_message_open_container(req, AF_INET6);
1744 if (r < 0)
1745 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1746
1747 if (!link_ipv6ll_enabled(link))
1748 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
6f6296b9 1749 else if (link->network->ipv6ll_address_gen_mode < 0) {
a6f1848a
SS		 1750 r = sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL);
1751 if (r < 0) {
1752 /* The file may not exist. And even if it exists, when stable_secret is unset,
1753 * reading the file fails with EIO. */
1754 log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret: %m");
1755
1756 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1757 } else
1758 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1759 } else
6f6296b9 1760 ipv6ll_mode = link->network->ipv6ll_address_gen_mode;
0e2fdb83
SS		 1761
1762 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1763 if (r < 0)
1764 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1765
1766 r = sd_netlink_message_close_container(req);
1767 if (r < 0)
1768 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1769
1770 r = sd_netlink_message_close_container(req);
1771 if (r < 0)
1772 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1773
1774 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1775 link_netlink_destroy_callback, link);
1776 if (r < 0)
1777 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1778
1779 link_ref(link);
9524014e 1780 link->setting_genmode = true;
0e2fdb83
SS		 1781
1782 return 0;
1783}
1784
302a796f 1785static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1786 int r;
1787
1746cf2a
TG		 1788 assert(link);
1789
5da8149f 1790 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1791 return 1;
1792
1c4baffc 1793 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1794 if (r < 0)
26d6b214 1795 /* we warn but don't fail the link, as it may be brought up later */
5ecb131d 1796 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
45ad2c13 1797
f882c247
TG		 1798 return 1;
1799}
1800
1cc84f3b 1801static int link_up(Link *link) {
4afd3348 1802 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1803 int r;
1804
f882c247 1805 assert(link);
c106cc36 1806 assert(link->network);
f882c247
TG		 1807 assert(link->manager);
1808 assert(link->manager->rtnl);
1809
6a7a4e4d 1810 log_link_debug(link, "Bringing link up");
449f7554 1811
6a7a4e4d
LP		 1812 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1813 if (r < 0)
1814 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1815
2b2d8603 1816 /* set it free if not enslaved with networkd */
6cb955c6 1817 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1818 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1819 if (r < 0)
1820 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1821 }
1822
5d4795f3 1823 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1824 if (r < 0)
1825 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1826
c106cc36 1827 if (link->network->mac) {
1c4baffc 1828 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1829 if (r < 0)
1830 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1831 }
1832
302a796f
YW		 1833 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1834 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1835 if (r < 0)
1836 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1837
b226d99b
TG		 1838 link_ref(link);
1839
f882c247
TG		 1840 return 0;
1841}
1842
302a796f 1843static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1844 int r;
1845
1846 assert(link);
1847
1848 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1849 return 1;
1850
1c4baffc 1851 r = sd_netlink_message_get_errno(m);
0d4ad91d 1852 if (r < 0)
5ecb131d 1853 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
0d4ad91d
AR		 1854
1855 return 1;
1856}
1857
8e54db83 1858int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1859 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1860 int r;
1861
1862 assert(link);
1863 assert(link->manager);
1864 assert(link->manager->rtnl);
1865
6a7a4e4d 1866 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1867
1868 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1869 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1870 if (r < 0)
1871 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1872
1873 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1874 if (r < 0)
1875 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1876
8e54db83
YW		 1877 r = netlink_call_async(link->manager->rtnl, NULL, req,
1878 callback ?: link_down_handler,
302a796f 1879 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1880 if (r < 0)
1881 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1882
1883 link_ref(link);
1884
1885 return 0;
1886}
1887
89fe6535
SS		 1888static int link_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1889 int r;
1890
1891 assert(link);
1892
1893 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1894 return 1;
1895
1896 r = sd_netlink_message_get_errno(m);
1897 if (r < 0)
1898 log_link_message_warning_errno(link, m, r, "Could not set group for the interface");
1899
1900 return 1;
1901}
1902
1903static int link_set_group(Link *link) {
1904 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1905 int r;
1906
1907 assert(link);
1908 assert(link->network);
1909 assert(link->manager);
1910 assert(link->manager->rtnl);
1911
1912 if (link->network->group <= 0)
1913 return 0;
1914
1915 log_link_debug(link, "Setting group");
1916
1917 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1918 if (r < 0)
1919 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1920
1921 r = sd_netlink_message_append_u32(req, IFLA_GROUP, link->network->group);
1922 if (r < 0)
1923 return log_link_error_errno(link, r, "Could not set link group: %m");
1924
1925 r = netlink_call_async(link->manager->rtnl, NULL, req, link_group_handler,
1926 link_netlink_destroy_callback, link);
1927 if (r < 0)
1928 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1929
1930 link_ref(link);
1931
1932 return 0;
1933}
1934
0d4ad91d
AR		 1935static int link_handle_bound_to_list(Link *link) {
1936 Link *l;
1937 Iterator i;
1938 int r;
1939 bool required_up = false;
1940 bool link_is_up = false;
1941
1942 assert(link);
1943
1944 if (hashmap_isempty(link->bound_to_links))
1945 return 0;
1946
1947 if (link->flags & IFF_UP)
1948 link_is_up = true;
1949
1950 HASHMAP_FOREACH (l, link->bound_to_links, i)
1951 if (link_has_carrier(l)) {
1952 required_up = true;
1953 break;
1954 }
1955
1956 if (!required_up && link_is_up) {
8e54db83 1957 r = link_down(link, NULL);
0d4ad91d
AR		 1958 if (r < 0)
1959 return r;
1960 } else if (required_up && !link_is_up) {
1961 r = link_up(link);
1962 if (r < 0)
1963 return r;
1964 }
1965
1966 return 0;
1967}
1968
1969static int link_handle_bound_by_list(Link *link) {
1970 Iterator i;
1971 Link *l;
1972 int r;
1973
1974 assert(link);
1975
1976 if (hashmap_isempty(link->bound_by_links))
1977 return 0;
1978
1979 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1980 r = link_handle_bound_to_list(l);
1981 if (r < 0)
1982 return r;
1983 }
1984
1985 return 0;
1986}
1987
1988static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1989 int r;
1990
1991 assert(link);
1992 assert(carrier);
1993
1994 if (link == carrier)
1995 return 0;
1996
1997 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1998 return 0;
1999
2000 r = hashmap_ensure_allocated(h, NULL);
2001 if (r < 0)
2002 return r;
2003
2004 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
2005 if (r < 0)
2006 return r;
2007
2008 return 0;
2009}
2010
2011static int link_new_bound_by_list(Link *link) {
2012 Manager *m;
2013 Link *carrier;
2014 Iterator i;
2015 int r;
2016 bool list_updated = false;
2017
2018 assert(link);
2019 assert(link->manager);
2020
2021 m = link->manager;
2022
b295beea 2023 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 2024 if (!carrier->network)
2025 continue;
2026
2027 if (strv_isempty(carrier->network->bind_carrier))
2028 continue;
2029
191a3f16 2030 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 2031 r = link_put_carrier(link, carrier, &link->bound_by_links);
2032 if (r < 0)
2033 return r;
2034
2035 list_updated = true;
2036 }
2037 }
2038
2039 if (list_updated)
84de38c5 2040 link_dirty(link);
0d4ad91d 2041
b295beea 2042 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 2043 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2044 if (r < 0)
2045 return r;
2046
84de38c5 2047 link_dirty(carrier);
0d4ad91d
AR		 2048 }
2049
2050 return 0;
2051}
2052
2053static int link_new_bound_to_list(Link *link) {
2054 Manager *m;
2055 Link *carrier;
2056 Iterator i;
2057 int r;
2058 bool list_updated = false;
2059
2060 assert(link);
2061 assert(link->manager);
2062
2063 if (!link->network)
2064 return 0;
2065
2066 if (strv_isempty(link->network->bind_carrier))
2067 return 0;
2068
2069 m = link->manager;
2070
2071 HASHMAP_FOREACH (carrier, m->links, i) {
191a3f16 2072 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 2073 r = link_put_carrier(link, carrier, &link->bound_to_links);
2074 if (r < 0)
2075 return r;
2076
2077 list_updated = true;
2078 }
2079 }
2080
2081 if (list_updated)
84de38c5 2082 link_dirty(link);
0d4ad91d
AR		 2083
2084 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2085 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2086 if (r < 0)
2087 return r;
2088
84de38c5 2089 link_dirty(carrier);
0d4ad91d
AR		 2090 }
2091
2092 return 0;
2093}
2094
2095static int link_new_carrier_maps(Link *link) {
2096 int r;
2097
2098 r = link_new_bound_by_list(link);
2099 if (r < 0)
2100 return r;
2101
2102 r = link_handle_bound_by_list(link);
2103 if (r < 0)
2104 return r;
2105
2106 r = link_new_bound_to_list(link);
2107 if (r < 0)
2108 return r;
2109
2110 r = link_handle_bound_to_list(link);
2111 if (r < 0)
2112 return r;
2113
2114 return 0;
2115}
2116
2117static void link_free_bound_to_list(Link *link) {
2118 Link *bound_to;
2119 Iterator i;
2120
2121 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2122 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2123
2124 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2125 link_dirty(bound_to);
0d4ad91d
AR		 2126 }
2127
2128 return;
2129}
2130
2131static void link_free_bound_by_list(Link *link) {
2132 Link *bound_by;
2133 Iterator i;
2134
2135 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2136 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2137
2138 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2139 link_dirty(bound_by);
0d4ad91d
AR		 2140 link_handle_bound_to_list(bound_by);
2141 }
2142 }
2143
2144 return;
2145}
2146
2147static void link_free_carrier_maps(Link *link) {
2148 bool list_updated = false;
2149
2150 assert(link);
2151
2152 if (!hashmap_isempty(link->bound_to_links)) {
2153 link_free_bound_to_list(link);
2154 list_updated = true;
2155 }
2156
2157 if (!hashmap_isempty(link->bound_by_links)) {
2158 link_free_bound_by_list(link);
2159 list_updated = true;
2160 }
2161
2162 if (list_updated)
84de38c5 2163 link_dirty(link);
0d4ad91d
AR		 2164
2165 return;
2166}
2167
5f707e12
YW		 2168static int link_append_to_master(Link *link, NetDev *netdev) {
2169 Link *master;
2170 int r;
2171
2172 assert(link);
2173 assert(netdev);
2174
2175 r = link_get(link->manager, netdev->ifindex, &master);
2176 if (r < 0)
2177 return r;
2178
de7fef4b 2179 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 2180 if (r <= 0)
5f707e12
YW		 2181 return r;
2182
2183 link_ref(link);
2184 return 0;
2185}
2186
2187static void link_drop_from_master(Link *link, NetDev *netdev) {
2188 Link *master;
2189
2190 assert(link);
2191
2192 if (!link->manager || !netdev)
2193 return;
2194
2195 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2196 return;
2197
2198 link_unref(set_remove(master->slaves, link));
2199}
2200
2201static void link_detach_from_manager(Link *link) {
2202 if (!link || !link->manager)
2203 return;
2204
2205 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2206 link_clean(link);
2207
2208 /* The following must be called at last. */
2209 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2210 link_unref(link);
2211}
2212
0d4ad91d
AR		 2213void link_drop(Link *link) {
2214 if (!link || link->state == LINK_STATE_LINGER)
2215 return;
2216
2217 link_set_state(link, LINK_STATE_LINGER);
2218
2219 link_free_carrier_maps(link);
2220
5f707e12
YW		 2221 if (link->network) {
2222 link_drop_from_master(link, link->network->bridge);
2223 link_drop_from_master(link, link->network->bond);
2224 }
2225
6a7a4e4d 2226 log_link_debug(link, "Link removed");
0d4ad91d 2227
db2f8a2e 2228 (void) unlink(link->state_file);
c4397d94 2229 link_detach_from_manager(link);
0d4ad91d
AR		 2230}
2231
3f265037 2232static int link_joined(Link *link) {
f882c247
TG		 2233 int r;
2234
ef1ba606 2235 assert(link);
f5be5601 2236 assert(link->network);
dd3efc09 2237
0d4ad91d
AR		 2238 if (!hashmap_isempty(link->bound_to_links)) {
2239 r = link_handle_bound_to_list(link);
2240 if (r < 0)
2241 return r;
2242 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2243 r = link_up(link);
2244 if (r < 0) {
2245 link_enter_failed(link);
2246 return r;
2247 }
ef1ba606 2248 }
f882c247 2249
9ed794a3 2250 if (link->network->bridge) {
e1853b00 2251 r = link_set_bridge(link);
6a7a4e4d
LP		 2252 if (r < 0)
2253 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 2254
2255 r = link_append_to_master(link, link->network->bridge);
2256 if (r < 0)
2257 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 2258 }
2259
eb64b435 2260 if (link->network->bond) {
7fcee284 2261 r = link_set_bond(link);
eb64b435
SS		 2262 if (r < 0)
2263 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2264
45e11abf 2265 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2266 if (r < 0)
2267 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2268 }
2269
ffff9abe
TJ		 2270 if (link->network->use_br_vlan &&
2271 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2272 r = link_set_bridge_vlan(link);
2273 if (r < 0)
2274 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2275 }
2276
c1835a42
RM		 2277 /* Skip setting up addresses until it gets carrier,
2278 or it would try to set addresses twice,
2279 which is bad for non-idempotent steps. */
dad2d78e 2280 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2281 return 0;
2282
b425c3ae 2283 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 2284 return link_request_set_addresses(link);
02b59d57
TG		 2285}
2286
302a796f 2287static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2288 int r;
2289
1746cf2a 2290 assert(link);
ef1ba606 2291 assert(link->network);
34bf3c00 2292 assert(link->enslaving > 0);
02b59d57 2293
313cefa1 2294 link->enslaving--;
52433f6b 2295
5da8149f 2296 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2297 return 1;
2298
1c4baffc 2299 r = sd_netlink_message_get_errno(m);
856f962c 2300 if (r < 0 && r != -EEXIST) {
5ecb131d 2301 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG		 2302 link_enter_failed(link);
2303 return 1;
4ff296b0
YW		 2304 }
2305
2306 log_link_debug(link, "Joined netdev");
02b59d57 2307
34bf3c00 2308 if (link->enslaving == 0) {
4ff296b0
YW		 2309 r = link_joined(link);
2310 if (r < 0)
2311 link_enter_failed(link);
34bf3c00 2312 }
02b59d57
TG		 2313
2314 return 1;
2315}
2316
3f265037 2317static int link_enter_join_netdev(Link *link) {
6a0a2f86 2318 NetDev *netdev;
672682a6 2319 Iterator i;
02b59d57
TG		 2320 int r;
2321
2322 assert(link);
2323 assert(link->network);
bd08ce56 2324 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2325
289e6774 2326 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2327
84de38c5 2328 link_dirty(link);
34bf3c00 2329 link->enslaving = 0;
02b59d57 2330
d9c67ea1 2331 if (link->network->bond) {
cbff7170
TJ		 2332 if (link->network->bond->state == NETDEV_STATE_READY &&
2333 link->network->bond->ifindex == link->master_ifindex)
2334 return link_joined(link);
2335
f2341e0a
LP		 2336 log_struct(LOG_DEBUG,
2337 LOG_LINK_INTERFACE(link),
2338 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2339 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2340
34bf3c00
YW		 2341 link->enslaving++;
2342
f2341e0a 2343 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2344 if (r < 0) {
f2341e0a
LP		 2345 log_struct_errno(LOG_WARNING, r,
2346 LOG_LINK_INTERFACE(link),
2347 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2348 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2349 link_enter_failed(link);
2350 return r;
2351 }
0ad6148e
MO		 2352 }
2353
d9c67ea1 2354 if (link->network->bridge) {
f2341e0a
LP		 2355 log_struct(LOG_DEBUG,
2356 LOG_LINK_INTERFACE(link),
2357 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2358 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2359
34bf3c00
YW		 2360 link->enslaving++;
2361
f2341e0a 2362 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2363 if (r < 0) {
f2341e0a
LP		 2364 log_struct_errno(LOG_WARNING, r,
2365 LOG_LINK_INTERFACE(link),
2366 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2367 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2368 link_enter_failed(link);
2369 return r;
2370 }
52433f6b
TG		 2371 }
2372
6cb955c6
AR		 2373 if (link->network->vrf) {
2374 log_struct(LOG_DEBUG,
2375 LOG_LINK_INTERFACE(link),
2376 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2377 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2378
34bf3c00
YW		 2379 link->enslaving++;
2380
6cb955c6
AR		 2381 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2382 if (r < 0) {
2383 log_struct_errno(LOG_WARNING, r,
2384 LOG_LINK_INTERFACE(link),
2385 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2386 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2387 link_enter_failed(link);
2388 return r;
2389 }
6cb955c6
AR		 2390 }
2391
6a0a2f86 2392 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2393
2b6db913
YW		 2394 if (netdev->ifindex > 0)
2395 /* Assume already enslaved. */
a63e5daa 2396 continue;
a63e5daa 2397
7033af49
YW		 2398 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2399 continue;
2400
f2341e0a
LP		 2401 log_struct(LOG_DEBUG,
2402 LOG_LINK_INTERFACE(link),
2403 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2404 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2405
34bf3c00
YW		 2406 link->enslaving++;
2407
f2341e0a 2408 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2409 if (r < 0) {
f2341e0a
LP		 2410 log_struct_errno(LOG_WARNING, r,
2411 LOG_LINK_INTERFACE(link),
2412 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2413 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2414 link_enter_failed(link);
2415 return r;
2416 }
326cb406
SS		 2417 }
2418
34bf3c00
YW		 2419 if (link->enslaving == 0)
2420 return link_joined(link);
2421
ef1ba606
TG		 2422 return 0;
2423}
2424
769d324c 2425static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2426 int r;
2427
765afd5c 2428 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2429 return 0;
2430
765afd5c
LP		 2431 /* We propagate the forwarding flag from one interface to the
2432 * global setting one way. This means: as long as at least one
2433 * interface was configured at any time that had IP forwarding
2434 * enabled the setting will stay on for good. We do this
2435 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2436 * somewhat in sync (see below). */
15dee3f0 2437
62e021a9 2438 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2439 if (r < 0)
765afd5c 2440 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2441
769d324c
LP		 2442 return 0;
2443}
2444
2445static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2446 int r;
2447
765afd5c 2448 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2449 return 0;
2450
61233823 2451 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2452 * packet forwarding setting: either packet forwarding is on
2453 * for all, or off for all. We hence don't bother with a
2454 * per-interface setting, but simply propagate the interface
2455 * flag, if it is set, to the global flag, one-way. Note that
2456 * while IPv4 would allow a per-interface flag, we expose the
2457 * same behaviour there and also propagate the setting from
2458 * one to all, to keep things simple (see above). */
15dee3f0 2459
62e021a9 2460 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2461 if (r < 0)
765afd5c 2462 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2463
2464 return 0;
2465}
2466
49092e22 2467static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2468 IPv6PrivacyExtensions s;
49092e22
SS		 2469 int r;
2470
1f0d9695 2471 s = link_ipv6_privacy_extensions(link);
66a6bd68 2472 if (s < 0)
49092e22
SS		 2473 return 0;
2474
62e021a9 2475 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2476 if (r < 0)
49092e22
SS		 2477 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2478
2479 return 0;
2480}
2481
4f2e437a 2482static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2483 int r;
2484
2485 /* Make this a NOP if IPv6 is not available */
2486 if (!socket_ipv6_is_supported())
2487 return 0;
2488
2489 if (link->flags & IFF_LOOPBACK)
2490 return 0;
2491
d68e2e59
LP		 2492 if (!link->network)
2493 return 0;
2494
62e021a9 2495 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2496 if (r < 0)
fe307276 2497 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2498
2499 return 0;
2500}
2501
8749cbcd 2502static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2503 int r;
2504
2505 /* Make this a NOP if IPv6 is not available */
2506 if (!socket_ipv6_is_supported())
2507 return 0;
2508
2509 if (link->flags & IFF_LOOPBACK)
2510 return 0;
2511
d68e2e59
LP		 2512 if (!link->network)
2513 return 0;
2514
8749cbcd
SS		 2515 if (link->network->ipv6_dad_transmits < 0)
2516 return 0;
2517
62e021a9 2518 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2519 if (r < 0)
8749cbcd 2520 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2521
2522 return 0;
2523}
2524
b69c3180 2525static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2526 int r;
2527
2528 /* Make this a NOP if IPv6 is not available */
2529 if (!socket_ipv6_is_supported())
2530 return 0;
2531
2532 if (link->flags & IFF_LOOPBACK)
2533 return 0;
2534
d68e2e59
LP		 2535 if (!link->network)
2536 return 0;
2537
b69c3180
SS		 2538 if (link->network->ipv6_hop_limit < 0)
2539 return 0;
2540
62e021a9 2541 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2542 if (r < 0)
b69c3180 2543 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2544
2545 return 0;
2546}
2547
11102cba 2548static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2549 int r;
2550
2551 /* Make this a NOP if IPv6 is not available */
2552 if (!socket_ipv6_is_supported())
2553 return 0;
2554
2555 if (link->flags & IFF_LOOPBACK)
2556 return 0;
2557
2558 if (link->network->ipv6_mtu == 0)
2559 return 0;
2560
d236718c
DS		 2561 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
2562 * on the interface. Bump up IPv6 MTU bytes to IPV6_MTU_MIN. */
2563 if (link->network->ipv6_mtu < IPV6_MIN_MTU) {
2564 log_link_notice(link, "Bumping IPv6 MTU to "STRINGIFY(IPV6_MIN_MTU)" byte minimum required");
2565 link->network->ipv6_mtu = IPV6_MIN_MTU;
2566 }
2567
62e021a9 2568 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
d236718c
DS		 2569 if (r < 0) {
2570 if (link->mtu < link->network->ipv6_mtu)
2571 log_link_warning(link, "Cannot set IPv6 MTU %"PRIu32" higher than device MTU %"PRIu32,
2572 link->network->ipv6_mtu, link->mtu);
2573 else
2574 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2575 }
2576
2577 link->ipv6_mtu_set = true;
11102cba
SS		 2578
2579 return 0;
2580}
2581
94d76d07
YW		 2582static int link_set_ipv4_accept_local(Link *link) {
2583 int r;
2584
2585 if (link->flags & IFF_LOOPBACK)
2586 return 0;
2587
2588 if (link->network->ipv4_accept_local < 0)
2589 return 0;
2590
2591 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "accept_local", link->network->ipv4_accept_local);
2592 if (r < 0)
2593 log_link_warning_errno(link, r, "Cannot set IPv4 accept_local flag for interface: %m");
2594
2595 return 0;
2596}
2597
30226d27
TJ		 2598static bool link_is_static_address_configured(Link *link, Address *address) {
2599 Address *net_address;
2600
2601 assert(link);
2602 assert(address);
2603
2604 if (!link->network)
2605 return false;
2606
2607 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2608 if (address_equal(net_address, address))
2609 return true;
2610
2611 return false;
2612}
2613
d1bdafd2
WKI		 2614static bool link_is_neighbor_configured(Link *link, Neighbor *neighbor) {
2615 Neighbor *net_neighbor;
2616
2617 assert(link);
2618 assert(neighbor);
2619
2620 if (!link->network)
2621 return false;
2622
2623 LIST_FOREACH(neighbors, net_neighbor, link->network->neighbors)
2624 if (neighbor_equal(net_neighbor, neighbor))
2625 return true;
2626
2627 return false;
2628}
2629
7ecf0c3e
TJ		 2630static bool link_is_static_route_configured(Link *link, Route *route) {
2631 Route *net_route;
2632
2633 assert(link);
2634 assert(route);
2635
2636 if (!link->network)
2637 return false;
2638
2639 LIST_FOREACH(routes, net_route, link->network->static_routes)
2640 if (route_equal(net_route, route))
2641 return true;
2642
2643 return false;
2644}
2645
db51778f
YW		 2646static bool link_address_is_dynamic(Link *link, Address *address) {
2647 Route *route;
2648 Iterator i;
2649
2650 assert(link);
2651 assert(address);
2652
2653 if (address->cinfo.ifa_prefered != CACHE_INFO_INFINITY_LIFE_TIME)
2654 return true;
2655
2656 /* Even when the address is leased from a DHCP server, networkd assign the address
2657 * without lifetime when KeepConfiguration=dhcp. So, let's check that we have
2658 * corresponding routes with RTPROT_DHCP. */
2659 SET_FOREACH(route, link->routes_foreign, i) {
2660 if (route->protocol != RTPROT_DHCP)
2661 continue;
2662
2663 if (address->family != route->family)
2664 continue;
2665
2666 if (in_addr_equal(address->family, &address->in_addr, &route->prefsrc))
2667 return true;
2668 }
2669
2670 return false;
2671}
2672
0917a271
DS		 2673static int link_enumerate_ipv6_tentative_addresses(Link *link) {
2674 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
2675 sd_netlink_message *addr;
2676 int r;
2677
2678 assert(link);
2679 assert(link->manager);
2680 assert(link->manager->rtnl);
2681
2682 r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_GETADDR, 0, AF_INET6);
2683 if (r < 0)
2684 return r;
2685
2686 r = sd_netlink_call(link->manager->rtnl, req, 0, &reply);
2687 if (r < 0)
2688 return r;
2689
2690 for (addr = reply; addr; addr = sd_netlink_message_next(addr)) {
2691 unsigned char flags;
2692 int ifindex;
2693
2694 r = sd_rtnl_message_addr_get_ifindex(addr, &ifindex);
2695 if (r < 0) {
2696 log_link_warning_errno(link, r, "rtnl: invalid ifindex, ignoring: %m");
2697 continue;
2698 } else if (link->ifindex != ifindex)
2699 continue;
2700
2701 r = sd_rtnl_message_addr_get_flags(addr, &flags);
2702 if (r < 0) {
2703 log_link_warning_errno(link, r, "rtnl: received address message with invalid flags, ignoring: %m");
2704 continue;
2705 } else if (!(flags & IFA_F_TENTATIVE))
2706 continue;
2707
2708 log_link_debug(link, "Found tentative ipv6 link-local address");
2709 (void) manager_rtnl_process_address(link->manager->rtnl, addr, link->manager);
2710 }
2711
2712 return 0;
2713}
2714
5e5b137a
TG		 2715static int link_drop_foreign_config(Link *link) {
2716 Address *address;
d1bdafd2 2717 Neighbor *neighbor;
5e5b137a
TG		 2718 Route *route;
2719 Iterator i;
2720 int r;
2721
0917a271
DS		 2722 /* The kernel doesn't notify us about tentative addresses;
2723 * so if ipv6ll is disabled, we need to enumerate them now so we can drop them below */
2724 if (!link_ipv6ll_enabled(link)) {
2725 r = link_enumerate_ipv6_tentative_addresses(link);
2726 if (r < 0)
2727 return r;
2728 }
2729
5e5b137a 2730 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2731 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2732 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
5e5b137a
TG		 2733 continue;
2734
db51778f 2735 if (link_address_is_dynamic(link, address)) {
b1b0b42e 2736 if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
db51778f 2737 continue;
b1b0b42e 2738 } else if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
db51778f
YW		 2739 continue;
2740
30226d27
TJ		 2741 if (link_is_static_address_configured(link, address)) {
2742 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2743 if (r < 0)
2744 return log_link_error_errno(link, r, "Failed to add address: %m");
2745 } else {
63ae0569 2746 r = address_remove(address, link, NULL);
30226d27
TJ		 2747 if (r < 0)
2748 return r;
2749 }
5e5b137a
TG		 2750 }
2751
d1bdafd2
WKI		 2752 SET_FOREACH(neighbor, link->neighbors_foreign, i) {
2753 if (link_is_neighbor_configured(link, neighbor)) {
2754 r = neighbor_add(link, neighbor->family, &neighbor->in_addr, &neighbor->lladdr, neighbor->lladdr_size, NULL);
2755 if (r < 0)
2756 return r;
2757 } else {
2758 r = neighbor_remove(neighbor, link, NULL);
2759 if (r < 0)
2760 return r;
2761 }
2762 }
2763
5e5b137a 2764 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2765 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2766 if (route->protocol == RTPROT_KERNEL)
2767 continue;
2768
bd7d6cec
YW		 2769 /* do not touch multicast route added by kernel */
2770 /* FIXME: Why the kernel adds this route with protocol RTPROT_BOOT??? We need to investigate that.
2771 * https://tools.ietf.org/html/rfc4862#section-5.4 may explain why. */
2772 if (route->protocol == RTPROT_BOOT &&
2773 route->family == AF_INET6 &&
2774 route->dst_prefixlen == 8 &&
2775 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 }}} }))
2776 continue;
2777
b1b0b42e 2778 if (route->protocol == RTPROT_STATIC && link->network &&
db51778f
YW		 2779 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2780 continue;
2781
b1b0b42e 2782 if (route->protocol == RTPROT_DHCP && link->network &&
db51778f
YW		 2783 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2784 continue;
2785
7ecf0c3e 2786 if (link_is_static_route_configured(link, route)) {
f1368755 2787 r = route_add(link, route, NULL);
7ecf0c3e
TJ		 2788 if (r < 0)
2789 return r;
2790 } else {
4645ad47 2791 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2792 if (r < 0)
2793 return r;
2794 }
5e5b137a
TG		 2795 }
2796
2797 return 0;
2798}
2799
3104883d 2800static int link_drop_config(Link *link) {
410a7f15 2801 Address *address, *pool_address;
d1bdafd2 2802 Neighbor *neighbor;
3104883d
SS		 2803 Route *route;
2804 Iterator i;
2805 int r;
2806
2807 SET_FOREACH(address, link->addresses, i) {
2808 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2809 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
3104883d
SS		 2810 continue;
2811
63ae0569 2812 r = address_remove(address, link, NULL);
3104883d
SS		 2813 if (r < 0)
2814 return r;
410a7f15
RM		 2815
2816 /* If this address came from an address pool, clean up the pool */
2817 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2818 if (address_equal(address, pool_address)) {
2819 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2820 address_free(pool_address);
2821 break;
2822 }
2823 }
3104883d
SS		 2824 }
2825
d1bdafd2
WKI		 2826 SET_FOREACH(neighbor, link->neighbors, i) {
2827 r = neighbor_remove(neighbor, link, NULL);
2828 if (r < 0)
2829 return r;
2830 }
2831
3104883d
SS		 2832 SET_FOREACH(route, link->routes, i) {
2833 /* do not touch routes managed by the kernel */
2834 if (route->protocol == RTPROT_KERNEL)
2835 continue;
2836
4645ad47 2837 r = route_remove(route, link, NULL);
3104883d
SS		 2838 if (r < 0)
2839 return r;
2840 }
2841
c69305ff
LP		 2842 ndisc_flush(link);
2843
3104883d
SS		 2844 return 0;
2845}
2846
051e77ca
SS		 2847static int link_configure_ipv4_dad(Link *link) {
2848 Address *address;
2849 int r;
2850
2851 assert(link);
2852 assert(link->network);
2853
2854 LIST_FOREACH(addresses, address, link->network->static_addresses)
2855 if (address->family == AF_INET &&
2856 FLAGS_SET(address->duplicate_address_detection, ADDRESS_FAMILY_IPV4)) {
2857 r = configure_ipv4_duplicate_address_detection(link, address);
2858 if (r < 0)
2859 return log_link_error_errno(link, r, "Failed to configure IPv4ACD: %m");
2860 }
2861
2862 return 0;
2863}
2864
34658df2
YW		 2865static int link_configure_traffic_control(Link *link) {
2866 TrafficControl *tc;
0f5bd7fe 2867 Iterator i;
02b59d57
TG		 2868 int r;
2869
34658df2
YW		 2870 link->tc_configured = false;
2871 link->tc_messages = 0;
4ecdcb07 2872
34658df2
YW		 2873 ORDERED_HASHMAP_FOREACH(tc, link->network->tc_by_section, i) {
2874 r = traffic_control_configure(link, tc);
4ecdcb07
YW		 2875 if (r < 0)
2876 return r;
2877 }
2878
34658df2
YW		 2879 if (link->tc_messages == 0)
2880 link->tc_configured = true;
4ecdcb07 2881 else
34658df2 2882 log_link_debug(link, "Configuring traffic control");
4ecdcb07
YW		 2883
2884 return 0;
2885}
2886
518cd6b5
SS		 2887static int link_configure_sr_iov(Link *link) {
2888 SRIOV *sr_iov;
2889 Iterator i;
2890 int r;
2891
2892 link->sr_iov_configured = false;
2893 link->sr_iov_messages = 0;
2894
2895 ORDERED_HASHMAP_FOREACH(sr_iov, link->network->sr_iov_by_section, i) {
2896 r = sr_iov_configure(link, sr_iov);
2897 if (r < 0)
2898 return r;
2899 }
2900
2901 if (link->sr_iov_messages == 0)
2902 link->sr_iov_configured = true;
2903 else
2904 log_link_debug(link, "Configuring SR-IOV");
2905
2906 return 0;
2907}
2908
4ecdcb07
YW		 2909static int link_configure(Link *link) {
2910 int r;
2911
ef1ba606 2912 assert(link);
b22d8a00 2913 assert(link->network);
bd08ce56 2914 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2915
34658df2 2916 r = link_configure_traffic_control(link);
4ecdcb07
YW		 2917 if (r < 0)
2918 return r;
2919
518cd6b5
SS		 2920 r = link_configure_sr_iov(link);
2921 if (r < 0)
2922 return r;
2923
500b96eb 2924 if (link->iftype == ARPHRD_CAN)
93ea7750 2925 return link_configure_can(link);
92c918b0 2926
482efedc
SS		 2927 /* If IPv6 configured that is static IPv6 address and IPv6LL autoconfiguration is enabled
2928 * for this interface, then enable IPv6 */
57ad7607 2929 (void) link_update_ipv6_sysctl(link);
482efedc 2930
23d8b221
SS		 2931 r = link_set_proxy_arp(link);
2932 if (r < 0)
2933 return r;
2934
a0e5c15d
FK		 2935 r = ipv6_proxy_ndp_addresses_configure(link);
2936 if (r < 0)
2937 return r;
2938
769d324c
LP		 2939 r = link_set_ipv4_forward(link);
2940 if (r < 0)
2941 return r;
2942
2943 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2944 if (r < 0)
2945 return r;
2946
49092e22
SS		 2947 r = link_set_ipv6_privacy_extensions(link);
2948 if (r < 0)
2949 return r;
2950
4f2e437a
SS		 2951 r = link_set_ipv6_accept_ra(link);
2952 if (r < 0)
2953 return r;
2954
8749cbcd
SS		 2955 r = link_set_ipv6_dad_transmits(link);
2956 if (r < 0)
2957 return r;
b69c3180
SS		 2958
2959 r = link_set_ipv6_hop_limit(link);
2960 if (r < 0)
2961 return r;
8749cbcd 2962
94d76d07
YW		 2963 r = link_set_ipv4_accept_local(link);
2964 if (r < 0)
2965 return r;
2966
99d2baa2
SS		 2967 r = link_set_flags(link);
2968 if (r < 0)
2969 return r;
2970
89fe6535
SS		 2971 r = link_set_group(link);
2972 if (r < 0)
2973 return r;
2974
910feb78 2975 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
b22d8a00 2976 r = ipv4ll_configure(link);
eb34d4af
TG		 2977 if (r < 0)
2978 return r;
2979 }
2980
78c958f8 2981 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2982 r = dhcp4_set_promote_secondaries(link);
2983 if (r < 0)
2984 return r;
2985
3c9b8860 2986 r = dhcp4_configure(link);
eb34d4af
TG		 2987 if (r < 0)
2988 return r;
eb34d4af
TG		 2989 }
2990
78c958f8 2991 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2992 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2993 if (r < 0)
2994 return r;
2995
2996 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2997 if (r < 0)
2998 return r;
dd43110f
TG		 2999 }
3000
62379e88
TG		 3001 if (link_dhcp6_enabled(link) ||
3002 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 3003 r = dhcp6_configure(link);
3004 if (r < 0)
3005 return r;
3006 }
3007
3008 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 3009 r = ndisc_configure(link);
4138fb2c
PF		 3010 if (r < 0)
3011 return r;
3012 }
3013
7465dd22
PF		 3014 if (link_radv_enabled(link)) {
3015 r = radv_configure(link);
3016 if (r < 0)
3017 return r;
3018 }
3019
8e1ad1ea 3020 if (link_lldp_rx_enabled(link)) {
7f853950 3021 r = link_lldp_rx_configure(link);
273eec24
LP		 3022 if (r < 0)
3023 return r;
ce43e484
SS		 3024 }
3025
f6fcc1c2 3026 r = link_configure_mtu(link);
40288ece
YW		 3027 if (r < 0)
3028 return r;
44b598a1 3029
9f6e82e6
YW		 3030 r = link_configure_addrgen_mode(link);
3031 if (r < 0)
3032 return r;
0e2fdb83 3033
051e77ca
SS		 3034 r = link_configure_ipv4_dad(link);
3035 if (r < 0)
3036 return r;
3037
3a390124
DS		 3038 return link_configure_continue(link);
3039}
3040
3041/* The configuration continues in this separate function, instead of
3042 * including this in the above link_configure() function, for two
3043 * reasons:
3044 * 1) some devices reset the link when the mtu is set, which caused
3045 * an infinite loop here in networkd; see:
3046 * https://github.com/systemd/systemd/issues/6593
3047 * https://github.com/systemd/systemd/issues/9831
3048 * 2) if ipv6ll is disabled, then bringing the interface up must be
3049 * delayed until after we get confirmation from the kernel that
3050 * the addr_gen_mode parameter has been set (via netlink), see:
3051 * https://github.com/systemd/systemd/issues/13882
3052 */
3053static int link_configure_continue(Link *link) {
55dc8c4a
YW		 3054 int r;
3055
3056 assert(link);
3057 assert(link->network);
bd08ce56 3058 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a 3059
9524014e 3060 if (link->setting_mtu || link->setting_genmode)
55dc8c4a
YW		 3061 return 0;
3062
4c649652
DS		 3063 /* Drop foreign config, but ignore loopback or critical devices.
3064 * We do not want to remove loopback address or addresses used for root NFS. */
3065 if (!(link->flags & IFF_LOOPBACK) &&
3066 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
3067 r = link_drop_foreign_config(link);
3068 if (r < 0)
3069 return r;
3070 }
3071
d236718c
DS		 3072 /* The kernel resets ipv6 mtu after changing device mtu;
3073 * we must set this here, after we've set device mtu */
3074 r = link_set_ipv6_mtu(link);
3075 if (r < 0)
3076 return r;
3077
dad2d78e 3078 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 3079 r = link_acquire_conf(link);
3080 if (r < 0)
3081 return r;
cc544d5f 3082 }
1e9be60b 3083
3f265037 3084 return link_enter_join_netdev(link);
505f8da7
TG		 3085}
3086
27dfc982
YW		 3087static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
3088 assert(duid);
3089
3090 if (duid->raw_data_len > 0)
3091 return 0;
3092
3093 if (duid->type != DUID_TYPE_UUID)
3094 return -EINVAL;
3095
3096 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
3097 duid->raw_data_len = sizeof(sd_id128_t);
3098
3099 return 1;
3100}
3101
3102int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
3103 Manager *manager = userdata;
3104 const sd_bus_error *e;
3105 const void *a;
3106 size_t sz;
3107 DUID *duid;
3108 Link *link;
3109 int r;
3110
3111 assert(m);
3112 assert(manager);
3113
3114 e = sd_bus_message_get_error(m);
3115 if (e) {
3116 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 3117 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 3118 e->message);
3119 goto configure;
3120 }
3121
3122 r = sd_bus_message_read_array(m, 'y', &a, &sz);
3123 if (r < 0)
3124 goto configure;
3125
3126 if (sz != sizeof(sd_id128_t)) {
ab4dd984 3127 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 3128 goto configure;
3129 }
3130
3131 memcpy(&manager->product_uuid, a, sz);
3132 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
3133 (void) duid_set_uuid(duid, manager->product_uuid);
3134
3135 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
3136
3137configure:
3138 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3dc2e7af
YW		 3139 link_unref(link);
3140
27dfc982
YW		 3141 r = link_configure(link);
3142 if (r < 0)
4ff296b0 3143 link_enter_failed(link);
27dfc982
YW		 3144 }
3145
3146 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
3147
3148 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
3149 * even if the method fails. */
3150 manager->has_product_uuid = true;
3151
3152 return 1;
3153}
3154
3155static bool link_requires_uuid(Link *link) {
3156 const DUID *duid;
3157
3158 assert(link);
3159 assert(link->manager);
3160 assert(link->network);
3161
3162 duid = link_get_duid(link);
3163 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
3164 return false;
3165
3166 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
3167 return true;
3168
3169 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
3170 return true;
3171
3172 return false;
3173}
3174
3175static int link_configure_duid(Link *link) {
3176 Manager *m;
3177 DUID *duid;
3178 int r;
3179
3180 assert(link);
3181 assert(link->manager);
3182 assert(link->network);
3183
3184 m = link->manager;
3185 duid = link_get_duid(link);
3186
3187 if (!link_requires_uuid(link))
3188 return 1;
3189
3190 if (m->has_product_uuid) {
3191 (void) duid_set_uuid(duid, m->product_uuid);
3192 return 1;
3193 }
3194
3195 if (!m->links_requesting_uuid) {
3196 r = manager_request_product_uuid(m, link);
3197 if (r < 0) {
3198 if (r == -ENOMEM)
3199 return r;
3200
ab4dd984
ZJS		 3201 log_link_warning_errno(link, r,
3202 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 3203 return 1;
3204 }
3205 } else {
3206 r = set_put(m->links_requesting_uuid, link);
3207 if (r < 0)
3208 return log_oom();
39dbd0c7
ZJS		 3209 if (r > 0)
3210 link_ref(link);
27dfc982
YW		 3211
3212 r = set_put(m->duids_requesting_uuid, duid);
3213 if (r < 0)
3214 return log_oom();
3215 }
3216
3217 return 0;
3218}
3219
572b21d9 3220static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
ad932b15
YW		 3221 Network *network;
3222 int r;
3223
572b21d9
YW		 3224 if (m) {
3225 _cleanup_strv_free_ char **s = NULL;
3226
3227 r = sd_netlink_message_get_errno(m);
3228 if (r < 0)
3229 return r;
3230
3231 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3232 if (r < 0 && r != -ENODATA)
3233 return r;
3234
3235 strv_free_and_replace(link->alternative_names, s);
3236 }
3237
c643bda5
YW		 3238 r = network_get(link->manager, link->iftype, link->sd_device,
3239 link->ifname, link->alternative_names, link->driver,
3240 &link->mac, &link->permanent_mac,
3241 link->wlan_iftype, link->ssid, &link->bssid, &network);
ad932b15
YW		 3242 if (r == -ENOENT) {
3243 link_enter_unmanaged(link);
3244 return 0;
3245 } else if (r == 0 && network->unmanaged) {
3246 link_enter_unmanaged(link);
3247 return 0;
3248 } else if (r < 0)
3249 return r;
3250
99b8517c 3251 if (link->network == network && !force)
ad932b15
YW		 3252 return 0;
3253
3254 log_link_info(link, "Re-configuring with %s", network->filename);
3255
3256 /* Dropping old .network file */
3257 r = link_stop_clients(link, false);
572b21d9 3258 if (r < 0)
ad932b15 3259 return r;
ad932b15
YW		 3260
3261 if (link_dhcp4_server_enabled(link))
3262 (void) sd_dhcp_server_stop(link->dhcp_server);
3263
3264 r = link_drop_config(link);
3265 if (r < 0)
3266 return r;
3267
2c7b826d 3268 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
ad932b15
YW		 3269 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
3270 r = link_drop_foreign_config(link);
3271 if (r < 0)
3272 return r;
3273 }
3274
3275 link_free_carrier_maps(link);
3276 link_free_engines(link);
3277 link->network = network_unref(link->network);
3278
3279 /* Then, apply new .network file */
3280 r = network_apply(network, link);
3281 if (r < 0)
3282 return r;
3283
3284 r = link_new_carrier_maps(link);
3285 if (r < 0)
3286 return r;
3287
3288 link_set_state(link, LINK_STATE_INITIALIZED);
8ae7b8a1 3289 link_dirty(link);
ad932b15
YW		 3290
3291 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3292 * link_configure() is called later asynchronously. */
3293 r = link_configure_duid(link);
3294 if (r <= 0)
3295 return r;
3296
3297 r = link_configure(link);
3298 if (r < 0)
3299 return r;
3300
3301 return 0;
3302}
3303
572b21d9
YW		 3304static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3305 int r;
3306
3307 r = link_reconfigure_internal(link, m, false);
3308 if (r < 0)
3309 link_enter_failed(link);
3310
3311 return 1;
3312}
3313
3314static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3315 int r;
3316
3317 r = link_reconfigure_internal(link, m, true);
3318 if (r < 0)
3319 link_enter_failed(link);
3320
3321 return 1;
3322}
3323
3324int link_reconfigure(Link *link, bool force) {
3325 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
3326 int r;
3327
2c0d7ed3
YW		 3328 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
3329 return 0;
3330
572b21d9
YW		 3331 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3332 link->ifindex);
3333 if (r < 0)
3334 return r;
3335
3336 r = netlink_call_async(link->manager->rtnl, NULL, req,
3337 force ? link_force_reconfigure_handler : link_reconfigure_handler,
3338 link_netlink_destroy_callback, link);
3339 if (r < 0)
3340 return r;
3341
3342 link_ref(link);
3343
3344 return 0;
3345}
3346
e6bf7774 3347static int link_initialized_and_synced(Link *link) {
505f8da7 3348 Network *network;
505f8da7
TG		 3349 int r;
3350
3351 assert(link);
3352 assert(link->ifname);
3353 assert(link->manager);
3354
bd08ce56
YW		 3355 /* We may get called either from the asynchronous netlink callback,
3356 * or directly for link_add() if running in a container. See link_add(). */
3357 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 3358 return 0;
505f8da7 3359
6a7a4e4d 3360 log_link_debug(link, "Link state is up-to-date");
bd08ce56 3361 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 3362
0d4ad91d
AR		 3363 r = link_new_bound_by_list(link);
3364 if (r < 0)
3365 return r;
3366
3367 r = link_handle_bound_by_list(link);
3368 if (r < 0)
3369 return r;
3370
c4a03a56 3371 if (!link->network) {
0894cfe4 3372 r = wifi_get_info(link);
8d968fdd
YW		 3373 if (r < 0)
3374 return r;
3375
c643bda5
YW		 3376 r = network_get(link->manager, link->iftype, link->sd_device,
3377 link->ifname, link->alternative_names, link->driver,
3378 &link->mac, &link->permanent_mac,
3379 link->wlan_iftype, link->ssid, &link->bssid, &network);
c4a03a56
TG		 3380 if (r == -ENOENT) {
3381 link_enter_unmanaged(link);
4232cf04 3382 return 0;
a09dc546
DM		 3383 } else if (r == 0 && network->unmanaged) {
3384 link_enter_unmanaged(link);
3385 return 0;
c4a03a56
TG		 3386 } else if (r < 0)
3387 return r;
505f8da7 3388
c4a03a56
TG		 3389 if (link->flags & IFF_LOOPBACK) {
3390 if (network->link_local != ADDRESS_FAMILY_NO)
3391 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3392
c4a03a56
TG		 3393 if (network->dhcp != ADDRESS_FAMILY_NO)
3394 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3395
c4a03a56
TG		 3396 if (network->dhcp_server)
3397 log_link_debug(link, "Ignoring DHCP server for loopback link");
3398 }
bd2efe92 3399
7d342c03 3400 r = network_apply(network, link);
c4a03a56
TG		 3401 if (r < 0)
3402 return r;
3403 }
505f8da7 3404
0d4ad91d
AR		 3405 r = link_new_bound_to_list(link);
3406 if (r < 0)
3407 return r;
3408
27dfc982
YW		 3409 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3410 * link_configure() is called later asynchronously. */
3411 r = link_configure_duid(link);
3412 if (r <= 0)
3413 return r;
3414
a748b692
TG		 3415 r = link_configure(link);
3416 if (r < 0)
3417 return r;
3418
4232cf04 3419 return 0;
505f8da7
TG		 3420}
3421
302a796f 3422static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
572b21d9 3423 _cleanup_strv_free_ char **s = NULL;
4ff296b0
YW		 3424 int r;
3425
572b21d9
YW		 3426 r = sd_netlink_message_get_errno(m);
3427 if (r < 0) {
40681e5c 3428 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 3429 link_enter_failed(link);
3430 return 0;
3431 }
3432
3433 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3434 if (r < 0 && r != -ENODATA) {
3435 link_enter_failed(link);
3436 return 0;
3437 }
3438
3439 strv_free_and_replace(link->alternative_names, s);
3440
4ff296b0
YW		 3441 r = link_initialized_and_synced(link);
3442 if (r < 0)
3443 link_enter_failed(link);
e6bf7774
YW		 3444 return 1;
3445}
3446
51517f9e 3447int link_initialized(Link *link, sd_device *device) {
4afd3348 3448 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3449 int r;
3450
3451 assert(link);
3452 assert(link->manager);
3453 assert(link->manager->rtnl);
3454 assert(device);
3455
8434fd5c 3456 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3457 return 0;
3458
51517f9e 3459 if (link->sd_device)
679b3605
TG		 3460 return 0;
3461
79008bdd 3462 log_link_debug(link, "udev initialized link");
bd08ce56 3463 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 3464
51517f9e 3465 link->sd_device = sd_device_ref(device);
4f561e8e 3466
3c9b8860
TG		 3467 /* udev has initialized the link, but we don't know if we have yet
3468 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3469 * when it returns we know that the pending NEWLINKs have already been
3470 * processed and that we are up-to-date */
4f561e8e 3471
3c9b8860
TG		 3472 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3473 link->ifindex);
4f561e8e
TG		 3474 if (r < 0)
3475 return r;
3476
302a796f
YW		 3477 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3478 link_netlink_destroy_callback, link);
4f561e8e
TG		 3479 if (r < 0)
3480 return r;
3481
5da8149f
TG		 3482 link_ref(link);
3483
4f561e8e
TG		 3484 return 0;
3485}
3486
c4a03a56 3487static int link_load(Link *link) {
0bc70f1d
TG		 3488 _cleanup_free_ char *network_file = NULL,
3489 *addresses = NULL,
f703cc2c 3490 *routes = NULL,
0bc70f1d
TG		 3491 *dhcp4_address = NULL,
3492 *ipv4ll_address = NULL;
3493 union in_addr_union address;
c4a03a56
TG		 3494 int r;
3495
3496 assert(link);
3497
aa8fbc74 3498 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3499 "NETWORK_FILE", &network_file,
3500 "ADDRESSES", &addresses,
f703cc2c 3501 "ROUTES", &routes,
0bc70f1d 3502 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3503 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3504 if (r < 0 && r != -ENOENT)
3505 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3506
3507 if (network_file) {
3508 Network *network;
3509 char *suffix;
3510
3511 /* drop suffix */
3512 suffix = strrchr(network_file, '.');
3513 if (!suffix) {
3514 log_link_debug(link, "Failed to get network name from %s", network_file);
3515 goto network_file_fail;
3516 }
3517 *suffix = '\0';
3518
3519 r = network_get_by_name(link->manager, basename(network_file), &network);
3520 if (r < 0) {
3521 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3522 goto network_file_fail;
3523 }
3524
7d342c03 3525 r = network_apply(network, link);
c4a03a56
TG		 3526 if (r < 0)
3527 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3528 }
3529
3530network_file_fail:
3531
1f68f772
ZJS		 3532 for (const char *p = addresses; p; ) {
3533 _cleanup_free_ char *address_str = NULL;
3534 char *prefixlen_str;
3535 int family;
3536 unsigned char prefixlen;
c4a03a56 3537
1f68f772
ZJS		 3538 r = extract_first_word(&p, &address_str, NULL, 0);
3539 if (r < 0)
3540 log_link_warning_errno(link, r, "failed to parse ADDRESSES: %m");
3541 if (r <= 0)
3542 break;
c4a03a56 3543
1f68f772
ZJS		 3544 prefixlen_str = strchr(address_str, '/');
3545 if (!prefixlen_str) {
3546 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
3547 continue;
3548 }
3549 *prefixlen_str++ = '\0';
c4a03a56 3550
1f68f772
ZJS		 3551 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3552 if (r != 1) {
3553 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3554 continue;
3555 }
c4a03a56 3556
1f68f772
ZJS		 3557 r = in_addr_from_string_auto(address_str, &family, &address);
3558 if (r < 0) {
3559 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
3560 continue;
c4a03a56 3561 }
c4a03a56 3562
1f68f772
ZJS		 3563 r = address_add(link, family, &address, prefixlen, NULL);
3564 if (r < 0)
3565 return log_link_error_errno(link, r, "Failed to add address: %m");
3566 }
74544b4e 3567
1f68f772
ZJS		 3568 for (const char *p = routes; p; ) {
3569 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
3570 _cleanup_(route_freep) Route *tmp = NULL;
3571 _cleanup_free_ char *route_str = NULL;
3572 char *prefixlen_str;
3573 Route *route;
f703cc2c 3574
1f68f772
ZJS		 3575 r = extract_first_word(&p, &route_str, NULL, 0);
3576 if (r < 0)
3577 log_link_debug_errno(link, r, "failed to parse ROUTES: %m");
3578 if (r <= 0)
3579 break;
c598ac76 3580
1f68f772
ZJS		 3581 prefixlen_str = strchr(route_str, '/');
3582 if (!prefixlen_str) {
3583 log_link_debug(link, "Failed to parse route %s", route_str);
3584 continue;
3585 }
3586 *prefixlen_str++ = '\0';
f703cc2c 3587
1f68f772
ZJS		 3588 r = route_new(&tmp);
3589 if (r < 0)
3590 return log_oom();
f703cc2c 3591
1f68f772
ZJS		 3592 r = sscanf(prefixlen_str,
3593 "%hhu/%hhu/%"SCNu32"/%"PRIu32"/"USEC_FMT,
3594 &tmp->dst_prefixlen,
3595 &tmp->tos,
3596 &tmp->priority,
3597 &tmp->table,
3598 &tmp->lifetime);
3599 if (r != 5) {
3600 log_link_debug(link,
3601 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3602 prefixlen_str);
3603 continue;
3604 }
f1368755 3605
1f68f772
ZJS		 3606 r = in_addr_from_string_auto(route_str, &tmp->family, &tmp->dst);
3607 if (r < 0) {
3608 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
3609 continue;
3610 }
f703cc2c 3611
1f68f772
ZJS		 3612 r = route_add(link, tmp, &route);
3613 if (r < 0)
3614 return log_link_error_errno(link, r, "Failed to add route: %m");
f703cc2c 3615
1f68f772
ZJS		 3616 if (route->lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
3617 r = sd_event_add_time(link->manager->event, &expire,
3618 clock_boottime_or_monotonic(),
3619 route->lifetime, 0, route_expire_handler, route);
f703cc2c 3620 if (r < 0)
1f68f772 3621 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
f703cc2c 3622 }
1f68f772
ZJS		 3623
3624 sd_event_source_unref(route->expire);
3625 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3626 }
3627
0bc70f1d
TG		 3628 if (dhcp4_address) {
3629 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3630 if (r < 0) {
b68d26b8 3631 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3632 goto dhcp4_address_fail;
3633 }
3634
b1c626f6 3635 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3636 if (r < 0)
b68d26b8 3637 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d 3638
1b43e246
DS		 3639 r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0);
3640 if (r < 0)
3641 return log_link_error_errno(link, r, "Failed to attach DHCPv4 event: %m");
3642
0bc70f1d
TG		 3643 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3644 if (r < 0)
b68d26b8 3645 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3646 }
3647
3648dhcp4_address_fail:
3649
3650 if (ipv4ll_address) {
3651 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3652 if (r < 0) {
b68d26b8 3653 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3654 goto ipv4ll_address_fail;
3655 }
3656
3657 r = sd_ipv4ll_new(&link->ipv4ll);
3658 if (r < 0)
b68d26b8 3659 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d 3660
1b43e246
DS		 3661 r = sd_ipv4ll_attach_event(link->ipv4ll, NULL, 0);
3662 if (r < 0)
3663 return log_link_error_errno(link, r, "Failed to attach IPv4LL event: %m");
3664
0bc70f1d
TG		 3665 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3666 if (r < 0)
b68d26b8 3667 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3668 }
3669
3670ipv4ll_address_fail:
3671
c4a03a56
TG		 3672 return 0;
3673}
3674
1c4baffc 3675int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3676 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3677 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3678 Link *link;
5a937ea2 3679 int r;
505f8da7
TG		 3680
3681 assert(m);
fbbeb65a 3682 assert(m->rtnl);
505f8da7
TG		 3683 assert(message);
3684 assert(ret);
3685
3686 r = link_new(m, message, ret);
3687 if (r < 0)
3688 return r;
3689
3690 link = *ret;
3691
6a7a4e4d 3692 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3693
c4a03a56
TG		 3694 r = link_load(link);
3695 if (r < 0)
3696 return r;
3697
bf331d87
YW		 3698 if (path_is_read_only_fs("/sys") <= 0) {
3699 /* udev should be around */
ae06ab10 3700 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3701 r = sd_device_new_from_device_id(&device, ifindex_str);
3702 if (r < 0) {
4d59e14f
YW		 3703 log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m");
3704 return 0;
5c416fc4 3705 }
505f8da7 3706
5a937ea2 3707 r = sd_device_get_is_initialized(device);
51517f9e 3708 if (r < 0) {
bf331d87 3709 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 3710 goto failed;
3711 }
5a937ea2 3712 if (r == 0) {
505f8da7 3713 /* not yet ready */
79008bdd 3714 log_link_debug(link, "link pending udev initialization...");
505f8da7 3715 return 0;
3c4cb064 3716 }
505f8da7 3717
299ad32d
YW		 3718 r = device_is_renaming(device);
3719 if (r < 0) {
bf331d87 3720 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 3721 goto failed;
3722 }
3723 if (r > 0) {
bf331d87 3724 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 3725 return 0;
3726 }
3727
4f561e8e
TG		 3728 r = link_initialized(link, device);
3729 if (r < 0)
5c416fc4 3730 goto failed;
4f561e8e 3731 } else {
e6bf7774 3732 r = link_initialized_and_synced(link);
4f561e8e 3733 if (r < 0)
5c416fc4 3734 goto failed;
4f561e8e 3735 }
505f8da7 3736
a748b692 3737 return 0;
5c416fc4
TG		 3738failed:
3739 link_enter_failed(link);
3740 return r;
a748b692
TG		 3741}
3742
c601ebf7 3743int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3744 int r;
3745
3746 assert(link);
3747
3748 log_link_info(link, "Gained IPv6LL");
3749
c601ebf7 3750 link->ipv6ll_address = *address;
e7ab854c
TG		 3751 link_check_ready(link);
3752
b9ea3d2e 3753 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3754 r = link_acquire_ipv6_conf(link);
3755 if (r < 0) {
3756 link_enter_failed(link);
3757 return r;
3758 }
3759 }
3760
3761 return 0;
3762}
3763
9c0a72f9
TG		 3764static int link_carrier_gained(Link *link) {
3765 int r;
3766
3767 assert(link);
3768
0894cfe4 3769 r = wifi_get_info(link);
8d968fdd
YW		 3770 if (r < 0)
3771 return r;
3772 if (r > 0) {
572b21d9
YW		 3773 r = link_reconfigure_internal(link, NULL, false);
3774 if (r < 0) {
3775 link_enter_failed(link);
8d968fdd 3776 return r;
572b21d9 3777 }
8d968fdd
YW		 3778 }
3779
b9ea3d2e 3780 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3781 r = link_acquire_conf(link);
3782 if (r < 0) {
3783 link_enter_failed(link);
3784 return r;
3785 }
6fc25497 3786
b425c3ae 3787 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 3788 r = link_request_set_addresses(link);
6fc25497
SS		 3789 if (r < 0)
3790 return r;
9c0a72f9
TG		 3791 }
3792
0d4ad91d
AR		 3793 r = link_handle_bound_by_list(link);
3794 if (r < 0)
3795 return r;
3796
9c0a72f9
TG		 3797 return 0;
3798}
3799
3800static int link_carrier_lost(Link *link) {
3801 int r;
3802
3803 assert(link);
3804
25e992ba 3805 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3806 return 0;
3807
fbdb6605 3808 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3809 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3810 * configuration and stop the clients as well. */
97e7fb39
SS		 3811 if (link->setting_mtu)
3812 return 0;
3813
95355a28 3814 r = link_stop_clients(link, false);
9c0a72f9
TG		 3815 if (r < 0) {
3816 link_enter_failed(link);
3817 return r;
3818 }
3819
28464ae0
SS		 3820 if (link_dhcp4_server_enabled(link))
3821 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3822
3104883d
SS		 3823 r = link_drop_config(link);
3824 if (r < 0)
3825 return r;
3826
2c7b826d 3827 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
f258e948 3828 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3829 r = link_drop_foreign_config(link);
3830 if (r < 0)
3831 return r;
3832 }
3104883d 3833
0d4ad91d
AR		 3834 r = link_handle_bound_by_list(link);
3835 if (r < 0)
3836 return r;
3837
9c0a72f9
TG		 3838 return 0;
3839}
3840
3841int link_carrier_reset(Link *link) {
3842 int r;
3843
3844 assert(link);
3845
3846 if (link_has_carrier(link)) {
3847 r = link_carrier_lost(link);
3848 if (r < 0)
3849 return r;
3850
3851 r = link_carrier_gained(link);
3852 if (r < 0)
3853 return r;
3854
6a7a4e4d 3855 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3856 }
3857
3858 return 0;
3859}
3860
d236718c
DS		 3861/* This is called every time an interface admin state changes to up;
3862 * specifically, when IFF_UP flag changes from unset to set */
3863static int link_admin_state_up(Link *link) {
3864 int r;
3865
3866 /* We set the ipv6 mtu after the device mtu, but the kernel resets
3867 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
3868 * ipv6_mtu_set prevents this from trying to set it too early before
3869 * the link->network has been setup; we only need to reset it
3870 * here if we've already set it during normal initialization. */
3871 if (link->ipv6_mtu_set) {
3872 r = link_set_ipv6_mtu(link);
3873 if (r < 0)
3874 return r;
3875 }
3876
3877 return 0;
3878}
3879
1c4baffc 3880int link_update(Link *link, sd_netlink_message *m) {
572b21d9 3881 _cleanup_strv_free_ char **s = NULL;
c49b33ac 3882 struct ether_addr mac;
ca4e095a 3883 const char *ifname;
afe7fd56 3884 uint32_t mtu;
d236718c 3885 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 3886 int old_master, r;
22936833 3887
dd3efc09 3888 assert(link);
b8941f74 3889 assert(link->ifname);
22936833
TG		 3890 assert(m);
3891
7619683b 3892 if (link->state == LINK_STATE_LINGER) {
5238e957 3893 log_link_info(link, "Link re-added");
289e6774 3894 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3895
3896 r = link_new_carrier_maps(link);
3897 if (r < 0)
3898 return r;
7619683b
TG		 3899 }
3900
1c4baffc 3901 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3902 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3903 Manager *manager = link->manager;
b8941f74 3904
30de2b89 3905 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3906
30de2b89
YW		 3907 link_drop(link);
3908 r = link_add(manager, m, &link);
3909 if (r < 0)
3910 return r;
b8941f74
TG		 3911 }
3912
572b21d9
YW		 3913 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3914 if (r >= 0)
3915 strv_free_and_replace(link->alternative_names, s);
3916
1c4baffc 3917 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3918 if (r >= 0 && mtu > 0) {
3919 link->mtu = mtu;
4e964aa0 3920 if (link->original_mtu == 0) {
afe7fd56 3921 link->original_mtu = mtu;
6a7a4e4d 3922 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3923 }
3924
3925 if (link->dhcp_client) {
3c9b8860
TG		 3926 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3927 link->mtu);
fc95c359
YW		 3928 if (r < 0)
3929 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3930 }
7465dd22
PF		 3931
3932 if (link->radv) {
3933 r = sd_radv_set_mtu(link->radv, link->mtu);
3934 if (r < 0)
3935 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3936 }
9842de0d 3937 }
69629de9 3938
e9189a1f
TG		 3939 /* The kernel may broadcast NEWLINK messages without the MAC address
3940 set, simply ignore them. */
1c4baffc 3941 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3942 if (r >= 0) {
3c9b8860
TG		 3943 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3944 ETH_ALEN)) {
c49b33ac 3945
3c9b8860
TG		 3946 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3947 ETH_ALEN);
c49b33ac 3948
79008bdd 3949 log_link_debug(link, "MAC address: "
20861203
TG		 3950 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3951 mac.ether_addr_octet[0],
3952 mac.ether_addr_octet[1],
3953 mac.ether_addr_octet[2],
3954 mac.ether_addr_octet[3],
3955 mac.ether_addr_octet[4],
3956 mac.ether_addr_octet[5]);
c49b33ac 3957
20861203
TG		 3958 if (link->ipv4ll) {
3959 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3960 if (r < 0)
3961 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3962 }
c49b33ac 3963
20861203 3964 if (link->dhcp_client) {
3c9b8860 3965 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3966 (const uint8_t *) &link->mac,
3967 sizeof (link->mac),
3968 ARPHRD_ETHER);
6a7a4e4d
LP		 3969 if (r < 0)
3970 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3971
fff1f40c
YW		 3972 r = dhcp4_set_client_identifier(link);
3973 if (r < 0)
3974 return r;
c49b33ac 3975 }
4138fb2c
PF		 3976
3977 if (link->dhcp6_client) {
f24648a6 3978 const DUID* duid = link_get_duid(link);
8341a5c3 3979
4138fb2c 3980 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3981 (const uint8_t *) &link->mac,
3982 sizeof (link->mac),
3983 ARPHRD_ETHER);
6a7a4e4d
LP		 3984 if (r < 0)
3985 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3986
8217ed5e
TH		 3987 if (link->network->iaid_set) {
3988 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3989 link->network->iaid);
3990 if (r < 0)
3991 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3992 }
413708d1 3993
8341a5c3
ZJS		 3994 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3995 duid->type,
3996 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3997 duid->raw_data_len);
413708d1
VK		 3998 if (r < 0)
3999 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 4000 }
7465dd22
PF		 4001
4002 if (link->radv) {
4003 r = sd_radv_set_mac(link->radv, &link->mac);
4004 if (r < 0)
4005 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
4006 }
420d2058
SS		 4007
4008 if (link->ndisc) {
4009 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
4010 if (r < 0)
4011 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
4012 }
c49b33ac 4013 }
4f882b2a
TG		 4014 }
4015
bb262ef0
YW		 4016 old_master = link->master_ifindex;
4017 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
4018
d236718c 4019 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 4020 had_carrier = link_has_carrier(link);
4021
bb262ef0 4022 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 4023 if (r < 0)
4024 return r;
4025
d236718c
DS		 4026 if (!link_was_admin_up && (link->flags & IFF_UP)) {
4027 log_link_info(link, "Link UP");
4028
4029 r = link_admin_state_up(link);
4030 if (r < 0)
4031 return r;
4032 } else if (link_was_admin_up && !(link->flags & IFF_UP))
4033 log_link_info(link, "Link DOWN");
4034
273eec24
LP		 4035 r = link_update_lldp(link);
4036 if (r < 0)
4037 return r;
4038
a61bb41c
TG		 4039 carrier_gained = !had_carrier && link_has_carrier(link);
4040 carrier_lost = had_carrier && !link_has_carrier(link);
4041
4042 if (carrier_gained) {
6a7a4e4d 4043 log_link_info(link, "Gained carrier");
a61bb41c 4044
9c0a72f9
TG		 4045 r = link_carrier_gained(link);
4046 if (r < 0)
4047 return r;
a61bb41c 4048 } else if (carrier_lost) {
6a7a4e4d 4049 log_link_info(link, "Lost carrier");
a61bb41c 4050
9c0a72f9
TG		 4051 r = link_carrier_lost(link);
4052 if (r < 0)
a61bb41c 4053 return r;
a61bb41c
TG		 4054 }
4055
4056 return 0;
dd3efc09 4057}
fe8db0c5 4058
b295beea
LP		 4059static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
4060 bool space = false;
4061 Iterator i;
4062 Link *link;
4063
4064 assert(f);
4065 assert(prefix);
4066
4067 if (hashmap_isempty(h))
4068 return;
4069
0d536673 4070 fputs(prefix, f);
b295beea
LP		 4071 HASHMAP_FOREACH(link, h, i) {
4072 if (space)
0d536673 4073 fputc(' ', f);
b295beea
LP		 4074
4075 fprintf(f, "%i", link->ifindex);
4076 space = true;
4077 }
4078
0d536673 4079 fputc('\n', f);
b295beea
LP		 4080}
4081
15761549 4082static void link_save_dns(FILE *f, struct in_addr_data *dns, unsigned n_dns, bool *space) {
dddc8d1e 4083 for (unsigned j = 0; j < n_dns; j++) {
15761549 4084 _cleanup_free_ char *b = NULL;
dddc8d1e 4085 int r;
15761549
YW		 4086
4087 r = in_addr_to_string(dns[j].family, &dns[j].address, &b);
4088 if (r < 0) {
4089 log_debug_errno(r, "Failed to format address, ignoring: %m");
4090 continue;
4091 }
4092
4093 if (*space)
4094 fputc(' ', f);
4095 fputs(b, f);
4096 *space = true;
4097 }
4098}
4099
d5e172d2
ZJS		 4100static void serialize_addresses(
4101 FILE *f,
4102 const char *lvalue,
4103 bool *space,
4104 char **addresses,
4105 sd_dhcp_lease *lease,
4106 bool conditional,
ddb82ec2 4107 sd_dhcp_lease_server_type what,
d5e172d2
ZJS		 4108 sd_dhcp6_lease *lease6,
4109 bool conditional6,
4110 int (*lease6_get_addr)(sd_dhcp6_lease*, const struct in6_addr**),
4111 int (*lease6_get_fqdn)(sd_dhcp6_lease*, char ***)) {
4112 int r;
4113
4114 bool _space = false;
4115 if (!space)
4116 space = &_space;
4117
4118 if (lvalue)
4119 fprintf(f, "%s=", lvalue);
4120 fputstrv(f, addresses, NULL, space);
4121
4122 if (lease && conditional) {
4123 const struct in_addr *lease_addresses;
4124
4125 r = sd_dhcp_lease_get_servers(lease, what, &lease_addresses);
4126 if (r > 0)
d8bff5cc 4127 serialize_in_addrs(f, lease_addresses, r, space, in4_addr_is_non_local);
d5e172d2
ZJS		 4128 }
4129
4130 if (lease6 && conditional6 && lease6_get_addr) {
4131 const struct in6_addr *in6_addrs;
4132
4133 r = lease6_get_addr(lease6, &in6_addrs);
d8bff5cc
ZJS		 4134 if (r > 0)
4135 serialize_in6_addrs(f, in6_addrs, r, space);
d5e172d2
ZJS		 4136 }
4137
4138 if (lease6 && conditional6 && lease6_get_fqdn) {
4139 char **in6_hosts;
4140
4141 r = lease6_get_fqdn(lease6, &in6_hosts);
4142 if (r > 0)
4143 fputstrv(f, in6_hosts, NULL, space);
4144 }
4145
4146 if (lvalue)
4147 fputc('\n', f);
4148}
4149
fe8db0c5 4150int link_save(Link *link) {
d361b373 4151 const char *admin_state, *oper_state, *carrier_state, *address_state;
68a8723c 4152 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 4153 _cleanup_fclose_ FILE *f = NULL;
c1eb9872 4154 Route *route;
18d8a2cf 4155 Address *a;
e7780c8d 4156 Iterator i;
fe8db0c5
TG		 4157 int r;
4158
4159 assert(link);
4160 assert(link->state_file);
68a8723c 4161 assert(link->lease_file);
bbf7c048
TG		 4162 assert(link->manager);
4163
370e9930 4164 if (link->state == LINK_STATE_LINGER) {
6990fb6b 4165 (void) unlink(link->state_file);
370e9930
TG		 4166 return 0;
4167 }
4168
34437b4f
LP		 4169 link_lldp_save(link);
4170
deb2e523
TG		 4171 admin_state = link_state_to_string(link->state);
4172 assert(admin_state);
4173
e375dcde
TG		 4174 oper_state = link_operstate_to_string(link->operstate);
4175 assert(oper_state);
deb2e523 4176
ac999bf0
YW		 4177 carrier_state = link_carrier_state_to_string(link->carrier_state);
4178 assert(carrier_state);
4179
4180 address_state = link_address_state_to_string(link->address_state);
4181 assert(address_state);
4182
fe8db0c5
TG		 4183 r = fopen_temporary(link->state_file, &f, &temp_path);
4184 if (r < 0)
6a7a4e4d 4185 goto fail;
fe8db0c5 4186
5512a963 4187 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 4188
4189 fprintf(f,
4190 "# This is private data. Do not parse.\n"
deb2e523 4191 "ADMIN_STATE=%s\n"
ac999bf0
YW		 4192 "OPER_STATE=%s\n"
4193 "CARRIER_STATE=%s\n"
4194 "ADDRESS_STATE=%s\n",
4195 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 4196
bcb7a07e 4197 if (link->network) {
fe0e16db
YW		 4198 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
4199 const char *dhcp_domainname = NULL, *p;
07bdc70d 4200 sd_dhcp6_lease *dhcp6_lease = NULL;
fe0e16db 4201 bool space;
07bdc70d 4202
c1a38904
MTL		 4203 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
4204 yes_no(link->network->required_for_online));
4205
d5e172d2
ZJS		 4206 LinkOperationalStateRange st = link->network->required_operstate_for_online;
4207 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s%s%s\n",
4208 strempty(link_operstate_to_string(st.min)),
4209 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? ":" : "",
4210 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? strempty(link_operstate_to_string(st.max)) : "");
4ac77d63 4211
07bdc70d 4212 if (link->dhcp6_client) {
4058d339
TG		 4213 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
4214 if (r < 0 && r != -ENOMSG)
2206aa5c 4215 log_link_debug_errno(link, r, "Failed to get DHCPv6 lease: %m");
07bdc70d 4216 }
b0e39c82 4217
adc5b2e2
TG		 4218 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
4219
d5e172d2
ZJS		 4220 /************************************************************/
4221
0d536673 4222 fputs("DNS=", f);
ea352b40 4223 space = false;
15761549
YW		 4224 if (link->n_dns != (unsigned) -1)
4225 link_save_dns(f, link->dns, link->n_dns, &space);
4226 else
4227 link_save_dns(f, link->network->dns, link->network->n_dns, &space);
d5314fff 4228
d5e172d2
ZJS		 4229 serialize_addresses(f, NULL, &space,
4230 NULL,
4231 link->dhcp_lease,
4232 link->network->dhcp_use_dns,
ddb82ec2 4233 SD_DHCP_LEASE_DNS,
d5e172d2
ZJS		 4234 dhcp6_lease,
4235 link->network->dhcp6_use_dns,
4236 sd_dhcp6_lease_get_dns,
4237 NULL);
1e7a0e21
LP		 4238
4239 /* Make sure to flush out old entries before we use the NDISC data */
4240 ndisc_vacuum(link);
4241
b296797f 4242 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 4243 NDiscRDNSS *dd;
4244
d8bff5cc
ZJS		 4245 SET_FOREACH(dd, link->ndisc_rdnss, i)
4246 serialize_in6_addrs(f, &dd->address, 1, &space);
299d578f
SS		 4247 }
4248
4249 fputc('\n', f);
4250
d5e172d2
ZJS		 4251 /************************************************************/
4252
4253 serialize_addresses(f, "NTP", NULL,
4254 link->ntp ?: link->network->ntp,
4255 link->dhcp_lease,
4256 link->network->dhcp_use_ntp,
ddb82ec2 4257 SD_DHCP_LEASE_NTP,
d5e172d2
ZJS		 4258 dhcp6_lease,
4259 link->network->dhcp6_use_ntp,
4260 sd_dhcp6_lease_get_ntp_addrs,
4261 sd_dhcp6_lease_get_ntp_fqdn);
4262
4263 serialize_addresses(f, "SIP", NULL,
2a71d57f 4264 NULL,
d5e172d2
ZJS		 4265 link->dhcp_lease,
4266 link->network->dhcp_use_sip,
ddb82ec2 4267 SD_DHCP_LEASE_SIP,
2a71d57f 4268 NULL, false, NULL, NULL);
d5e172d2
ZJS		 4269
4270 /************************************************************/
bd8f6538 4271
b2a81c0b 4272 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 4273 if (link->dhcp_lease) {
b2a81c0b 4274 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 4275 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
4276 }
b2a81c0b
LP		 4277 if (dhcp6_lease)
4278 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 4279 }
4280
fe0e16db
YW		 4281 fputs("DOMAINS=", f);
4282 space = false;
15761549 4283 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains, i)
fe0e16db 4284 fputs_with_space(f, p, NULL, &space);
07bdc70d 4285
1e7a0e21 4286 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP		 4287 if (dhcp_domainname)
4288 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4289 if (dhcp_domains)
4290 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4291 if (dhcp6_domains)
4292 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 4293 }
4294
4295 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
4296 NDiscDNSSL *dd;
1e7a0e21
LP		 4297
4298 SET_FOREACH(dd, link->ndisc_dnssl, i)
4299 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4300 }
b2a81c0b 4301
0d536673 4302 fputc('\n', f);
6192b846 4303
d5e172d2
ZJS		 4304 /************************************************************/
4305
fe0e16db
YW		 4306 fputs("ROUTE_DOMAINS=", f);
4307 space = false;
15761549 4308 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains, i)
fe0e16db 4309 fputs_with_space(f, p, NULL, &space);
b2a81c0b 4310
1e7a0e21 4311 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
1e7a0e21
LP		 4312 if (dhcp_domainname)
4313 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4314 if (dhcp_domains)
4315 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4316 if (dhcp6_domains)
4317 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 4318 }
4319
4320 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
4321 NDiscDNSSL *dd;
1e7a0e21
LP		 4322
4323 SET_FOREACH(dd, link->ndisc_dnssl, i)
4324 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4325 }
b2a81c0b 4326
0d536673 4327 fputc('\n', f);
67272d15 4328
d5e172d2
ZJS		 4329 /************************************************************/
4330
3c9b8860 4331 fprintf(f, "LLMNR=%s\n",
15761549 4332 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
d5e172d2
ZJS		 4333
4334 /************************************************************/
4335
aaa297d4 4336 fprintf(f, "MDNS=%s\n",
15761549 4337 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
15761549 4338
d5e172d2
ZJS		 4339 /************************************************************/
4340
4341 int dns_default_route =
4342 link->dns_default_route >= 0 ? link->dns_default_route :
4343 link->network->dns_default_route;
4344 if (dns_default_route >= 0)
4345 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(dns_default_route));
4346
4347 /************************************************************/
4348
4349 DnsOverTlsMode dns_over_tls_mode =
4350 link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID ? link->dns_over_tls_mode :
4351 link->network->dns_over_tls_mode;
4352 if (dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
4353 fprintf(f, "DNS_OVER_TLS=%s\n", dns_over_tls_mode_to_string(dns_over_tls_mode));
4354
4355 /************************************************************/
4356
4357 DnssecMode dnssec_mode =
4358 link->dnssec_mode != _DNSSEC_MODE_INVALID ? link->dnssec_mode :
4359 link->network->dnssec_mode;
4360 if (dnssec_mode != _DNSSEC_MODE_INVALID)
4361 fprintf(f, "DNSSEC=%s\n", dnssec_mode_to_string(dnssec_mode));
4362
4363 /************************************************************/
4364
4365 Set *nta_anchors = link->dnssec_negative_trust_anchors;
4366 if (set_isempty(nta_anchors))
4367 nta_anchors = link->network->dnssec_negative_trust_anchors;
4368
4369 if (!set_isempty(nta_anchors)) {
8a516214
LP		 4370 const char *n;
4371
0d536673 4372 fputs("DNSSEC_NTA=", f);
8a516214 4373 space = false;
d5e172d2 4374 SET_FOREACH(n, nta_anchors, i)
d390f8ef 4375 fputs_with_space(f, n, NULL, &space);
0d536673 4376 fputc('\n', f);
8a516214
LP		 4377 }
4378
d5e172d2
ZJS		 4379 /************************************************************/
4380
0d536673 4381 fputs("ADDRESSES=", f);
e7780c8d
TG		 4382 space = false;
4383 SET_FOREACH(a, link->addresses, i) {
4384 _cleanup_free_ char *address_str = NULL;
4385
4386 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
4387 if (r < 0)
4388 goto fail;
4389
e7780c8d
TG		 4390 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
4391 space = true;
4392 }
0d536673 4393 fputc('\n', f);
c1eb9872 4394
d5e172d2
ZJS		 4395 /************************************************************/
4396
0d536673 4397 fputs("ROUTES=", f);
c1eb9872
TG		 4398 space = false;
4399 SET_FOREACH(route, link->routes, i) {
4400 _cleanup_free_ char *route_str = NULL;
4401
4402 r = in_addr_to_string(route->family, &route->dst, &route_str);
4403 if (r < 0)
4404 goto fail;
4405
ecc3f340
ZJS		 4406 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
4407 space ? " " : "", route_str,
f833694d 4408 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 4409 space = true;
4410 }
4411
0d536673 4412 fputc('\n', f);
bcb7a07e 4413 }
7374f9d8 4414
b295beea
LP		 4415 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
4416 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 4417
8eb9058d 4418 if (link->dhcp_lease) {
bd91b83e 4419 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 4420 if (r < 0)
c2d6bd61 4421 goto fail;
fe8db0c5 4422
7374f9d8 4423 fprintf(f,
b0e39c82
TG		 4424 "DHCP_LEASE=%s\n",
4425 link->lease_file);
deb2e523 4426 } else
6990fb6b 4427 (void) unlink(link->lease_file);
fe8db0c5 4428
0bc70f1d
TG		 4429 if (link->ipv4ll) {
4430 struct in_addr address;
4431
4432 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
4433 if (r >= 0) {
0d536673 4434 fputs("IPV4LL_ADDRESS=", f);
072320ea 4435 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 4436 fputc('\n', f);
0bc70f1d
TG		 4437 }
4438 }
4439
7e738e7b
SS		 4440 if (link->dhcp6_client) {
4441 _cleanup_free_ char *duid = NULL;
4442 uint32_t iaid;
4443
4444 r = sd_dhcp6_client_get_iaid(link->dhcp6_client, &iaid);
4445 if (r >= 0)
4446 fprintf(f, "DHCP6_CLIENT_IAID=0x%x\n", iaid);
4447
4448 r = sd_dhcp6_client_duid_as_string(link->dhcp6_client, &duid);
4449 if (r >= 0)
4450 fprintf(f, "DHCP6_CLIENT_DUID=%s\n", duid);
4451 }
18d8a2cf 4452
c2d6bd61
LP		 4453 r = fflush_and_check(f);
4454 if (r < 0)
4455 goto fail;
fe8db0c5 4456
c2d6bd61 4457 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 4458 r = -errno;
c2d6bd61 4459 goto fail;
fe8db0c5
TG		 4460 }
4461
c2d6bd61 4462 return 0;
dacd6cee 4463
c2d6bd61 4464fail:
6a7a4e4d 4465 (void) unlink(link->state_file);
6a7a4e4d
LP		 4466 if (temp_path)
4467 (void) unlink(temp_path);
4468
dacd6cee 4469 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 4470}
4471
84de38c5
TG		 4472/* The serialized state in /run is no longer up-to-date. */
4473void link_dirty(Link *link) {
4474 int r;
4475
4476 assert(link);
4477
0c241a37
SS		 4478 /* mark manager dirty as link is dirty */
4479 manager_dirty(link->manager);
4480
de7fef4b 4481 r = set_ensure_put(&link->manager->dirty_links, NULL, link);
0c241a37 4482 if (r <= 0)
de7fef4b 4483 /* Ignore allocation errors and don't take another ref if the link was already dirty */
84de38c5 4484 return;
84de38c5
TG		 4485 link_ref(link);
4486}
4487
4488/* The serialized state in /run is up-to-date */
4489void link_clean(Link *link) {
4490 assert(link);
4491 assert(link->manager);
4492
1046bf9b 4493 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4494}
4495
fe8db0c5 4496static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4497 [LINK_STATE_PENDING] = "pending",
bd08ce56 4498 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 4499 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 4500 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4501 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4502 [LINK_STATE_FAILED] = "failed",
370e9930 4503 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4504};
4505
4506DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
5ecb131d
YW		 4507
4508int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg) {
4509 const char *err_msg = NULL;
4510
4511 (void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg);
ab119e63
YW		 4512 return log_link_full(link, level, err,
4513 "%s: %s%s%s%m",
4514 msg,
4515 strempty(err_msg),
4516 err_msg && !endswith(err_msg, ".") ? "." : "",
4517 err_msg ? " " : "");
5ecb131d 4518}
Unnamed repository; edit this file 'description' to name the repository.