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network: drop unnecessary bracket
[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) {
e77bd3fd
YW		 669 if (link->n_dns != (unsigned) -1)
670 for (unsigned i = 0; i < link->n_dns; i++)
671 in_addr_full_free(link->dns[i]);
15761549
YW		 672 link->dns = mfree(link->dns);
673 link->n_dns = (unsigned) -1;
674
675 link->search_domains = ordered_set_free_free(link->search_domains);
676 link->route_domains = ordered_set_free_free(link->route_domains);
677
678 link->dns_default_route = -1;
679 link->llmnr = _RESOLVE_SUPPORT_INVALID;
680 link->mdns = _RESOLVE_SUPPORT_INVALID;
681 link->dnssec_mode = _DNSSEC_MODE_INVALID;
682 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
683
684 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
685}
686
1a6bb31f
YW		 687static void link_free_engines(Link *link) {
688 if (!link)
689 return;
690
691 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
692 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
693 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
1a6bb31f
YW		 694
695 link->lldp = sd_lldp_unref(link->lldp);
696
697 ndisc_flush(link);
698
699 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
700 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 701 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
1a6bb31f
YW		 702 link->ndisc = sd_ndisc_unref(link->ndisc);
703 link->radv = sd_radv_unref(link->radv);
704}
705
8301aa0b 706static Link *link_free(Link *link) {
428fd0a7
TG		 707 Address *address;
708
8301aa0b 709 assert(link);
f579559b 710
15761549
YW		 711 link_ntp_settings_clear(link);
712 link_dns_settings_clear(link);
713
8eec0b9d
YW		 714 link->routes = set_free(link->routes);
715 link->routes_foreign = set_free(link->routes_foreign);
6e537f62
YW		 716 link->dhcp_routes = set_free(link->dhcp_routes);
717 link->dhcp_routes_old = set_free(link->dhcp_routes_old);
1633c457
YW		 718 link->dhcp6_routes = set_free(link->dhcp6_routes);
719 link->dhcp6_routes_old = set_free(link->dhcp6_routes_old);
720 link->dhcp6_pd_routes = set_free(link->dhcp6_pd_routes);
721 link->dhcp6_pd_routes_old = set_free(link->dhcp6_pd_routes_old);
69203fba
YW		 722 link->ndisc_routes = set_free(link->ndisc_routes);
723 link->ndisc_routes_old = set_free(link->ndisc_routes_old);
adda1ed9 724
8eec0b9d
YW		 725 link->nexthops = set_free(link->nexthops);
726 link->nexthops_foreign = set_free(link->nexthops_foreign);
c16c7808 727
8eec0b9d
YW		 728 link->neighbors = set_free(link->neighbors);
729 link->neighbors_foreign = set_free(link->neighbors_foreign);
d1bdafd2 730
8eec0b9d
YW		 731 link->addresses = set_free(link->addresses);
732 link->addresses_foreign = set_free(link->addresses_foreign);
e5526518 733 link->static_addresses = set_free(link->static_addresses);
1633c457
YW		 734 link->dhcp6_addresses = set_free(link->dhcp6_addresses);
735 link->dhcp6_addresses_old = set_free(link->dhcp6_addresses_old);
736 link->dhcp6_pd_addresses = set_free(link->dhcp6_pd_addresses);
737 link->dhcp6_pd_addresses_old = set_free(link->dhcp6_pd_addresses_old);
69203fba
YW		 738 link->ndisc_addresses = set_free(link->ndisc_addresses);
739 link->ndisc_addresses_old = set_free(link->ndisc_addresses_old);
adda1ed9 740
11bf3cce
LP		 741 while ((address = link->pool_addresses)) {
742 LIST_REMOVE(addresses, link->pool_addresses, address);
743 address_free(address);
744 }
745
7272b25e 746 link_lldp_emit_stop(link);
1a6bb31f 747 link_free_engines(link);
68a8723c 748 free(link->lease_file);
49699bac
SS		 749 free(link->lldp_file);
750
c166a070 751 free(link->ifname);
572b21d9 752 strv_free(link->alternative_names);
ceac4078 753 free(link->kind);
8d968fdd 754 free(link->ssid);
c643bda5 755 free(link->driver);
6cad256d 756
db2f8a2e 757 (void) unlink(link->state_file);
fe8db0c5 758 free(link->state_file);
c166a070 759
51517f9e 760 sd_device_unref(link->sd_device);
b5db00e5 761
0d4ad91d 762 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 763 hashmap_free(link->bound_by_links);
764
5f707e12 765 set_free_with_destructor(link->slaves, link_unref);
033295c1 766
c9c908a6
YW		 767 network_unref(link->network);
768
8301aa0b 769 return mfree(link);
14b746f7
TG		 770}
771
8301aa0b 772DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 773
11a7f229
TG		 774int link_get(Manager *m, int ifindex, Link **ret) {
775 Link *link;
11a7f229
TG		 776
777 assert(m);
e856ed00 778 assert(ifindex > 0);
11a7f229
TG		 779 assert(ret);
780
ae06ab10 781 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 782 if (!link)
783 return -ENODEV;
784
785 *ret = link;
786
787 return 0;
788}
789
af9ba57a 790void link_set_state(Link *link, LinkState state) {
e331e246
TG		 791 assert(link);
792
793 if (link->state == state)
794 return;
795
0beb9542
YW		 796 log_link_debug(link, "State changed: %s -> %s",
797 link_state_to_string(link->state),
798 link_state_to_string(state));
799
e331e246
TG		 800 link->state = state;
801
802 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 803}
804
57bd6899
TG		 805static void link_enter_unmanaged(Link *link) {
806 assert(link);
807
e331e246 808 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 809
84de38c5 810 link_dirty(link);
57bd6899
TG		 811}
812
95355a28 813int link_stop_clients(Link *link, bool may_keep_dhcp) {
111bb8f9 814 int r = 0, k;
051e77ca 815 Address *ad;
111bb8f9
TG		 816
817 assert(link);
818 assert(link->manager);
819 assert(link->manager->event);
820
80060352
ZJS		 821 bool keep_dhcp = may_keep_dhcp &&
822 link->network &&
823 (link->manager->restarting ||
824 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
825
826 if (link->dhcp_client && !keep_dhcp) {
111bb8f9 827 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 828 if (k < 0)
36c7d709 829 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 830 }
831
ba179154 832 if (link->ipv4ll) {
111bb8f9 833 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 834 if (k < 0)
36c7d709 835 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 836 }
837
051e77ca
SS		 838 if (link->network)
839 LIST_FOREACH(addresses, ad, link->network->static_addresses)
840 if (ad->acd && sd_ipv4acd_is_running(ad->acd) == 0) {
841 k = sd_ipv4acd_stop(ad->acd);
842 if (k < 0)
843 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
844 }
845
f5a8c43f
TG		 846 if (link->dhcp6_client) {
847 k = sd_dhcp6_client_stop(link->dhcp6_client);
848 if (k < 0)
36c7d709 849 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 850 }
4138fb2c 851
1633c457
YW		 852 if (link_dhcp6_pd_is_enabled(link)) {
853 k = dhcp6_pd_remove(link);
854 if (k < 0)
855 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
856 }
857
1e7a0e21
LP		 858 if (link->ndisc) {
859 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 860 if (k < 0)
36c7d709 861 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 862 }
863
7465dd22 864 if (link->radv) {
290696e5 865 k = sd_radv_stop(link->radv);
7465dd22
PF		 866 if (k < 0)
867 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
868 }
869
7272b25e 870 link_lldp_emit_stop(link);
111bb8f9
TG		 871 return r;
872}
873
b22d8a00 874void link_enter_failed(Link *link) {
ef1ba606 875 assert(link);
f882c247 876
370e9930 877 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 878 return;
879
6a7a4e4d 880 log_link_warning(link, "Failed");
449f7554 881
e331e246 882 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 883
95355a28 884 link_stop_clients(link, false);
111bb8f9 885
84de38c5 886 link_dirty(link);
f882c247
TG		 887}
888
7033af49
YW		 889static int link_join_netdevs_after_configured(Link *link) {
890 NetDev *netdev;
891 Iterator i;
892 int r;
893
894 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
895 if (netdev->ifindex > 0)
896 /* Assume already enslaved. */
897 continue;
898
899 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
900 continue;
901
902 log_struct(LOG_DEBUG,
903 LOG_LINK_INTERFACE(link),
904 LOG_NETDEV_INTERFACE(netdev),
905 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
906
907 r = netdev_join(netdev, link, NULL);
908 if (r < 0)
909 return log_struct_errno(LOG_WARNING, r,
910 LOG_LINK_INTERFACE(link),
911 LOG_NETDEV_INTERFACE(netdev),
912 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
913 }
914
915 return 0;
916}
917
e3a7b048 918static void link_enter_configured(Link *link) {
dd43110f
TG		 919 assert(link);
920 assert(link->network);
e3a7b048 921
289e6774 922 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 923 return;
dd43110f 924
e331e246 925 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 926
7033af49
YW		 927 (void) link_join_netdevs_after_configured(link);
928
84de38c5 929 link_dirty(link);
dd43110f
TG		 930}
931
47079967 932static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 933 RoutingPolicyRule *rule, *rrule = NULL;
934 int r;
935
936 assert(link);
937 assert(link->network);
938
2428613f
YW		 939 link->routing_policy_rules_configured = false;
940
8a9b3a23 941 LIST_FOREACH(rules, rule, link->network->rules) {
b80a511b 942 r = routing_policy_rule_get(link->manager, rule, &rrule);
ff14e2eb
YW		 943 if (r >= 0) {
944 if (r == 0)
945 (void) routing_policy_rule_make_local(link->manager, rrule);
8a9b3a23
SS		 946 continue;
947 }
948
9f08a578 949 r = routing_policy_rule_configure(rule, link, NULL);
4ff296b0
YW		 950 if (r < 0)
951 return log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
7ef7e550
YW		 952 if (r > 0)
953 link->routing_policy_rule_messages++;
8a9b3a23
SS		 954 }
955
956 routing_policy_rule_purge(link->manager, link);
5d976f5f 957 if (link->routing_policy_rule_messages == 0)
7715629e 958 link->routing_policy_rules_configured = true;
5d976f5f 959 else {
7715629e 960 log_link_debug(link, "Setting routing policy rules");
b425c3ae
YW		 961 link_set_state(link, LINK_STATE_CONFIGURING);
962 }
8a9b3a23
SS		 963
964 return 0;
965}
966
c16c7808
SS		 967static int nexthop_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
968 int r;
969
970 assert(link);
971 assert(link->nexthop_messages > 0);
972 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
973 LINK_STATE_FAILED, LINK_STATE_LINGER));
974
975 link->nexthop_messages--;
976
977 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
978 return 1;
979
980 r = sd_netlink_message_get_errno(m);
981 if (r < 0 && r != -EEXIST) {
5ecb131d 982 log_link_message_warning_errno(link, m, r, "Could not set nexthop");
c16c7808
SS		 983 link_enter_failed(link);
984 return 1;
985 }
986
987 if (link->nexthop_messages == 0) {
988 log_link_debug(link, "Nexthop set");
989 link->static_nexthops_configured = true;
990 link_check_ready(link);
991 }
992
993 return 1;
994}
995
eb01a2df 996static int link_request_set_nexthop(Link *link) {
c16c7808
SS		 997 NextHop *nh;
998 int r;
999
0c816fcc
YW		 1000 link->static_nexthops_configured = false;
1001
c16c7808
SS		 1002 LIST_FOREACH(nexthops, nh, link->network->static_nexthops) {
1003 r = nexthop_configure(nh, link, nexthop_handler);
1004 if (r < 0)
1005 return log_link_warning_errno(link, r, "Could not set nexthop: %m");
1006 if (r > 0)
1007 link->nexthop_messages++;
1008 }
1009
1010 if (link->nexthop_messages == 0) {
1011 link->static_nexthops_configured = true;
1012 link_check_ready(link);
1013 } else {
1014 log_link_debug(link, "Setting nexthop");
1015 link_set_state(link, LINK_STATE_CONFIGURING);
1016 }
1017
1018 return 1;
1019}
1020
302a796f 1021static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1022 int r;
1023
1046bf9b 1024 assert(link);
7715629e 1025 assert(link->route_messages > 0);
289e6774
WKI		 1026 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
1027 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1028
7715629e 1029 link->route_messages--;
f882c247 1030
77a008c0 1031 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1032 return 1;
1033
1c4baffc 1034 r = sd_netlink_message_get_errno(m);
4ff296b0 1035 if (r < 0 && r != -EEXIST) {
5ecb131d 1036 log_link_message_warning_errno(link, m, r, "Could not set route");
4ff296b0
YW		 1037 link_enter_failed(link);
1038 return 1;
1039 }
f882c247 1040
7715629e 1041 if (link->route_messages == 0) {
6a7a4e4d 1042 log_link_debug(link, "Routes set");
7715629e 1043 link->static_routes_configured = true;
0c816fcc 1044 link_request_set_nexthop(link);
dd3efc09 1045 }
f882c247
TG		 1046
1047 return 1;
1048}
1049
b5799eeb 1050int link_request_set_routes(Link *link) {
bf61b05a
LP		 1051 enum {
1052 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
1053 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
1054 _PHASE_MAX
1055 } phase;
a6cc569e 1056 Route *rt;
f882c247
TG		 1057 int r;
1058
1059 assert(link);
1060 assert(link->network);
289e6774 1061 assert(link->state != _LINK_STATE_INVALID);
f882c247 1062
2428613f 1063 link->static_routes_configured = false;
27c34f73 1064
e5526518
YW		 1065 if (!link->addresses_ready)
1066 return 0;
1067
4e2ef9d9
YW		 1068 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
1069 /* During configuring addresses, the link lost its carrier. As networkd is dropping
1070 * the addresses now, let's not configure the routes either. */
1071 return 0;
1072
47079967 1073 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 1074 if (r < 0)
1075 return r;
f882c247 1076
bf61b05a
LP		 1077 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
1078 for (phase = 0; phase < _PHASE_MAX; phase++)
1079 LIST_FOREACH(routes, rt, link->network->static_routes) {
1985c54f
YW		 1080 if (rt->gateway_from_dhcp)
1081 continue;
0d34228f 1082
6ff5cc6b 1083 if ((in_addr_is_null(rt->family, &rt->gw) && ordered_set_isempty(rt->multipath_routes)) != (phase == PHASE_NON_GATEWAY))
bf61b05a 1084 continue;
a6cc569e 1085
80b0e860 1086 r = route_configure(rt, link, route_handler, NULL);
4ff296b0
YW		 1087 if (r < 0)
1088 return log_link_warning_errno(link, r, "Could not set routes: %m");
c4423317
YW		 1089 if (r > 0)
1090 link->route_messages++;
0d34228f 1091 }
f5be5601 1092
7715629e
ST		 1093 if (link->route_messages == 0) {
1094 link->static_routes_configured = true;
0c816fcc 1095 link_request_set_nexthop(link);
b425c3ae 1096 } else {
6a7a4e4d 1097 log_link_debug(link, "Setting routes");
b425c3ae
YW		 1098 link_set_state(link, LINK_STATE_CONFIGURING);
1099 }
f882c247
TG		 1100
1101 return 0;
1102}
1103
6accfd31
DA		 1104void link_check_ready(Link *link) {
1105 Address *a;
1106 Iterator i;
1107
1108 assert(link);
1109
5f58af25
YW		 1110 if (link->state == LINK_STATE_CONFIGURED)
1111 return;
1112
1113 if (link->state != LINK_STATE_CONFIGURING) {
1114 log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31 1115 return;
39373cb9 1116 }
6accfd31
DA		 1117
1118 if (!link->network)
1119 return;
1120
39373cb9
YW		 1121 if (!link->addresses_configured) {
1122 log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 1123 return;
39373cb9 1124 }
6accfd31 1125
39373cb9
YW		 1126 if (!link->neighbors_configured) {
1127 log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
6accfd31 1128 return;
39373cb9 1129 }
6accfd31 1130
6aa5773b 1131 SET_FOREACH(a, link->addresses, i)
39373cb9
YW		 1132 if (!address_is_ready(a)) {
1133 _cleanup_free_ char *str = NULL;
1134
1135 (void) in_addr_to_string(a->family, &a->in_addr, &str);
1136 log_link_debug(link, "%s(): an address %s/%d is not ready.", __func__, strnull(str), a->prefixlen);
6aa5773b 1137 return;
39373cb9 1138 }
6aa5773b 1139
39373cb9
YW		 1140 if (!link->static_routes_configured) {
1141 log_link_debug(link, "%s(): static routes are not configured.", __func__);
6accfd31 1142 return;
39373cb9 1143 }
6accfd31 1144
39373cb9
YW		 1145 if (!link->static_nexthops_configured) {
1146 log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 1147 return;
39373cb9 1148 }
c16c7808 1149
39373cb9
YW		 1150 if (!link->routing_policy_rules_configured) {
1151 log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 1152 return;
39373cb9 1153 }
6accfd31 1154
39373cb9
YW		 1155 if (!link->tc_configured) {
1156 log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
4ecdcb07 1157 return;
39373cb9 1158 }
4ecdcb07 1159
39373cb9
YW		 1160 if (!link->sr_iov_configured) {
1161 log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 1162 return;
39373cb9 1163 }
518cd6b5 1164
463797c1 1165 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
6accfd31 1166
1c09d84e 1167 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !link->ipv4ll_address_configured) {
39373cb9 1168 log_link_debug(link, "%s(): IPv4LL is not configured.", __func__);
463797c1 1169 return;
39373cb9 1170 }
6accfd31 1171
463797c1 1172 if (link_ipv6ll_enabled(link) &&
39373cb9
YW		 1173 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
1174 log_link_debug(link, "%s(): IPv6LL is not configured.", __func__);
463797c1 1175 return;
39373cb9 1176 }
6accfd31 1177
15797d6a
YW		 1178 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
1179 !link->dhcp_address && set_isempty(link->dhcp6_addresses) && set_isempty(link->ndisc_addresses) &&
1180 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
1181 log_link_debug(link, "%s(): DHCP4 or DHCP6 is enabled but no dynamic address is assigned yet.", __func__);
659ad3a0
YW		 1182 return;
1183 }
1184
1633c457 1185 if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_dhcp6_pd_is_enabled(link) || link_ipv6_accept_ra_enabled(link)) {
39373cb9
YW		 1186 if (!link->dhcp4_configured &&
1187 !(link->dhcp6_address_configured && link->dhcp6_route_configured) &&
1188 !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) &&
d98c546d 1189 !(link->ndisc_addresses_configured && link->ndisc_routes_configured) &&
1c09d84e 1190 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
39373cb9
YW		 1191 /* When DHCP or RA is enabled, at least one protocol must provide an address, or
1192 * an IPv4ll fallback address must be configured. */
1193 log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
1194 return;
1195 }
1196
d98c546d 1197 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		 1198 __func__,
1199 yes_no(link->dhcp4_configured),
1200 yes_no(link->dhcp6_address_configured),
1201 yes_no(link->dhcp6_route_configured),
1202 yes_no(link->dhcp6_pd_address_configured),
1203 yes_no(link->dhcp6_pd_route_configured),
d98c546d
YW		 1204 yes_no(link->ndisc_addresses_configured),
1205 yes_no(link->ndisc_routes_configured));
39373cb9 1206 }
463797c1 1207 }
6accfd31 1208
5f58af25 1209 link_enter_configured(link);
6accfd31
DA		 1210
1211 return;
1212}
1213
e4a71bf3
WKI		 1214static int link_request_set_neighbors(Link *link) {
1215 Neighbor *neighbor;
1216 int r;
1217
1218 assert(link);
1219 assert(link->network);
1220 assert(link->state != _LINK_STATE_INVALID);
1221
2428613f 1222 link->neighbors_configured = false;
e4a71bf3
WKI		 1223
1224 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
1225 r = neighbor_configure(neighbor, link, NULL);
4ff296b0
YW		 1226 if (r < 0)
1227 return log_link_warning_errno(link, r, "Could not set neighbor: %m");
e4a71bf3
WKI		 1228 }
1229
1230 if (link->neighbor_messages == 0) {
1231 link->neighbors_configured = true;
1232 link_check_ready(link);
b425c3ae 1233 } else {
e4a71bf3 1234 log_link_debug(link, "Setting neighbors");
b425c3ae
YW		 1235 link_set_state(link, LINK_STATE_CONFIGURING);
1236 }
e4a71bf3
WKI		 1237
1238 return 0;
1239}
1240
e5526518
YW		 1241static int link_set_bridge_fdb(Link *link) {
1242 FdbEntry *fdb_entry;
1243 int r;
1244
1245 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1246 r = fdb_entry_configure(link, fdb_entry);
1247 if (r < 0)
1248 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
1249 }
1250
1251 return 0;
1252}
1253
1254static int static_address_ready_callback(Address *address) {
1255 Address *a;
1256 Iterator i;
1257 Link *link;
1258
1259 assert(address);
1260 assert(address->link);
1261
1262 link = address->link;
1263
1264 if (!link->addresses_configured)
1265 return 0;
1266
1267 SET_FOREACH(a, link->static_addresses, i)
1268 if (!address_is_ready(a)) {
1269 _cleanup_free_ char *str = NULL;
1270
1271 (void) in_addr_to_string(a->family, &a->in_addr, &str);
1272 log_link_debug(link, "an address %s/%u is not ready", strnull(str), a->prefixlen);
1273 return 0;
1274 }
1275
1276 /* This should not be called again */
1277 SET_FOREACH(a, link->static_addresses, i)
1278 a->callback = NULL;
1279
1280 link->addresses_ready = true;
1281
1282 return link_request_set_routes(link);
1283}
1284
3650173f 1285static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1286 int r;
1287
4958aee4 1288 assert(rtnl);
f5be5601
TG		 1289 assert(m);
1290 assert(link);
1291 assert(link->ifname);
7715629e 1292 assert(link->address_messages > 0);
289e6774 1293 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1294 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1295
7715629e 1296 link->address_messages--;
f882c247 1297
5da8149f 1298 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1299 return 1;
1300
1c4baffc 1301 r = sd_netlink_message_get_errno(m);
4ff296b0 1302 if (r < 0 && r != -EEXIST) {
5ecb131d 1303 log_link_message_warning_errno(link, m, r, "Could not set address");
4ff296b0
YW		 1304 link_enter_failed(link);
1305 return 1;
1306 } else if (r >= 0)
1307 (void) manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1308
7715629e 1309 if (link->address_messages == 0) {
e5526518
YW		 1310 Address *a;
1311
6a7a4e4d 1312 log_link_debug(link, "Addresses set");
c42ff3a1 1313 link->addresses_configured = true;
e5526518
YW		 1314
1315 /* When all static addresses are already ready, then static_address_ready_callback()
1316 * will not be called automatically. So, call it here. */
1317 a = set_first(link->static_addresses);
1318 if (!a) {
1319 log_link_warning(link, "No static address is stored.");
1320 link_enter_failed(link);
1321 return 1;
1322 }
1323 if (!a->callback) {
1324 log_link_warning(link, "Address ready callback is not set.");
1325 link_enter_failed(link);
1326 return 1;
1327 }
1328 r = a->callback(a);
1329 if (r < 0)
1330 link_enter_failed(link);
dd3efc09 1331 }
f882c247
TG		 1332
1333 return 1;
1334}
1335
e5526518
YW		 1336static int static_address_configure(Address *address, Link *link, bool update) {
1337 Address *ret;
197e2809 1338 int r;
f6bb7ac5 1339
e5526518
YW		 1340 assert(address);
1341 assert(link);
1342
1343 r = address_configure(address, link, address_handler, update, &ret);
1344 if (r < 0)
1345 return log_link_warning_errno(link, r, "Could not configure static address: %m");
1346
1347 link->address_messages++;
1348
1349 r = set_ensure_put(&link->static_addresses, &address_hash_ops, ret);
1350 if (r < 0)
1351 return log_link_warning_errno(link, r, "Failed to store static address: %m");
1352
1353 ret->callback = static_address_ready_callback;
f6bb7ac5 1354
197e2809 1355 return 0;
f6bb7ac5
TJ		 1356}
1357
289e6774 1358static int link_request_set_addresses(Link *link) {
95b74ef6 1359 AddressLabel *label;
a6cc569e 1360 Address *ad;
bd6379ec 1361 Prefix *p;
f882c247
TG		 1362 int r;
1363
1364 assert(link);
1365 assert(link->network);
f5be5601 1366 assert(link->state != _LINK_STATE_INVALID);
f882c247 1367
2428613f
YW		 1368 /* Reset all *_configured flags we are configuring. */
1369 link->addresses_configured = false;
6aa5773b 1370 link->addresses_ready = false;
2428613f
YW		 1371 link->neighbors_configured = false;
1372 link->static_routes_configured = false;
c16c7808 1373 link->static_nexthops_configured = false;
2428613f
YW		 1374 link->routing_policy_rules_configured = false;
1375
f6bb7ac5
TJ		 1376 r = link_set_bridge_fdb(link);
1377 if (r < 0)
1378 return r;
1379
f3ef324d
YW		 1380 r = link_request_set_neighbors(link);
1381 if (r < 0)
1382 return r;
e4a71bf3 1383
3d3d4255 1384 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1385 bool update;
1386
6f5d73ab
YW		 1387 if (ad->family == AF_INET6 && !in_addr_is_null(ad->family, &ad->in_addr_peer))
1388 update = address_get(link, ad->family, &ad->in_addr_peer, ad->prefixlen, NULL) > 0;
1389 else
1390 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
a47a6dae 1391
e5526518 1392 r = static_address_configure(ad, link, update);
4ff296b0 1393 if (r < 0)
e5526518 1394 return r;
95b74ef6
SS		 1395 }
1396
61c0ef4f 1397 if (link->network->router_prefix_delegation & RADV_PREFIX_DELEGATION_STATIC)
bd6379ec
SS		 1398 LIST_FOREACH(prefixes, p, link->network->static_prefixes) {
1399 _cleanup_(address_freep) Address *address = NULL;
1400
1401 if (!p->assign)
1402 continue;
1403
1404 r = address_new(&address);
1405 if (r < 0)
e5526518 1406 return log_oom();
bd6379ec
SS		 1407
1408 r = sd_radv_prefix_get_prefix(p->radv_prefix, &address->in_addr.in6, &address->prefixlen);
1409 if (r < 0)
e5526518 1410 return log_link_warning_errno(link, r, "Could not get RA prefix: %m");
bd6379ec
SS		 1411
1412 r = generate_ipv6_eui_64_address(link, &address->in_addr.in6);
1413 if (r < 0)
e5526518 1414 return log_link_warning_errno(link, r, "Could not generate EUI64 address: %m");
bd6379ec
SS		 1415
1416 address->family = AF_INET6;
e5526518 1417 r = static_address_configure(address, link, true);
bd6379ec 1418 if (r < 0)
e5526518 1419 return r;
bd6379ec
SS		 1420 }
1421
95b74ef6 1422 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1423 r = address_label_configure(label, link, NULL, false);
4ff296b0
YW		 1424 if (r < 0)
1425 return log_link_warning_errno(link, r, "Could not set address label: %m");
f5be5601 1426
7715629e 1427 link->address_label_messages++;
f882c247
TG		 1428 }
1429
e5526518 1430 /* now that we can figure out a default address for the dhcp server, start it */
708c425d 1431 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
8fcf1d61 1432 r = dhcp4_server_configure(link);
4ff296b0 1433 if (r < 0)
d4cdbea5 1434 return r;
6a7a4e4d 1435 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1436 }
1437
c42ff3a1
WKI		 1438 if (link->address_messages == 0) {
1439 link->addresses_configured = true;
e5526518
YW		 1440 link->addresses_ready = true;
1441 r = link_request_set_routes(link);
1442 if (r < 0)
1443 return r;
b425c3ae 1444 } else {
6a7a4e4d 1445 log_link_debug(link, "Setting addresses");
b425c3ae
YW		 1446 link_set_state(link, LINK_STATE_CONFIGURING);
1447 }
431ca2ce 1448
f882c247
TG		 1449 return 0;
1450}
1451
13b498f9 1452static int link_set_bridge_vlan(Link *link) {
86e2be7b 1453 int r;
13b498f9
TJ		 1454
1455 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1456 if (r < 0)
1457 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1458
1459 return r;
1460}
1461
a60a720c 1462static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1463 int r;
1464
1465 if (!link_proxy_arp_enabled(link))
1466 return 0;
1467
62e021a9 1468 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1469 if (r < 0)
1470 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1471
1472 return 0;
1473}
1474
3a390124 1475static int link_configure_continue(Link *link);
55dc8c4a 1476
302a796f 1477static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1478 int r;
1479
1480 assert(m);
1481 assert(link);
1482 assert(link->ifname);
1483
55dc8c4a
YW		 1484 link->setting_mtu = false;
1485
5da8149f 1486 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1487 return 1;
1488
1c4baffc 1489 r = sd_netlink_message_get_errno(m);
4ff296b0 1490 if (r < 0)
5ecb131d 1491 log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring");
4ff296b0
YW		 1492 else
1493 log_link_debug(link, "Setting MTU done.");
55dc8c4a 1494
4ff296b0 1495 if (link->state == LINK_STATE_INITIALIZED) {
3a390124 1496 r = link_configure_continue(link);
4ff296b0
YW		 1497 if (r < 0)
1498 link_enter_failed(link);
1499 }
4f882b2a
TG		 1500
1501 return 1;
1502}
1503
933c70a0 1504int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1505 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1506 int r;
1507
1508 assert(link);
1509 assert(link->manager);
1510 assert(link->manager->rtnl);
1511
40288ece
YW		 1512 if (mtu == 0 || link->setting_mtu)
1513 return 0;
1514
933c70a0 1515 if (link->mtu == mtu)
ee493106
YW		 1516 return 0;
1517
6a7a4e4d 1518 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1519
6a7a4e4d
LP		 1520 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1521 if (r < 0)
1522 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1523
44b598a1 1524 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1525 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1526 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1527
1528 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
d236718c 1529 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes");
44b598a1 1530
72c2500b 1531 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1532 }
1533
1c4baffc 1534 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1535 if (r < 0)
1536 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1537
302a796f
YW		 1538 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1539 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1540 if (r < 0)
1541 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1542
ae941762 1543 link_ref(link);
1046bf9b 1544 link->setting_mtu = true;
b226d99b 1545
4f882b2a
TG		 1546 return 0;
1547}
1548
f6fcc1c2
YW		 1549static bool link_reduces_vlan_mtu(Link *link) {
1550 /* See netif_reduces_vlan_mtu() in kernel. */
1551 return streq_ptr(link->kind, "macsec");
1552}
1553
1554static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1555 uint32_t mtu = 0;
1556 NetDev *dev;
1557 Iterator i;
1558
1559 HASHMAP_FOREACH(dev, link->network->stacked_netdevs, i)
1560 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1561 /* See vlan_dev_change_mtu() in kernel. */
1562 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1563
1564 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1565 /* See macvlan_change_mtu() in kernel. */
1566 mtu = dev->mtu;
1567
1568 return mtu;
1569}
1570
1571static int link_configure_mtu(Link *link) {
1572 uint32_t mtu;
1573
1574 assert(link);
1575 assert(link->network);
1576
1577 if (link->network->mtu > 0)
1578 return link_set_mtu(link, link->network->mtu);
1579
1580 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1581 if (link->mtu >= mtu)
1582 return 0;
1583
1584 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1585 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1586 link->mtu, mtu);
1587
1588 return link_set_mtu(link, mtu);
1589}
1590
302a796f 1591static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1592 int r;
1593
1594 assert(m);
1595 assert(link);
1596 assert(link->ifname);
1597
1598 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1599 return 1;
1600
1601 r = sd_netlink_message_get_errno(m);
1602 if (r < 0)
5ecb131d 1603 log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring");
99d2baa2
SS		 1604
1605 return 1;
1606}
1607
1608static int link_set_flags(Link *link) {
1609 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1610 unsigned ifi_change = 0;
1611 unsigned ifi_flags = 0;
1612 int r;
1613
1614 assert(link);
1615 assert(link->manager);
1616 assert(link->manager->rtnl);
1617
1618 if (link->flags & IFF_LOOPBACK)
1619 return 0;
1620
1621 if (!link->network)
1622 return 0;
1623
866e6b7a 1624 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1625 return 0;
1626
1627 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1628 if (r < 0)
1629 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1630
1631 if (link->network->arp >= 0) {
1632 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1633 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1634 }
1635
1636 if (link->network->multicast >= 0) {
1637 ifi_change |= IFF_MULTICAST;
1638 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1639 }
1640
866e6b7a
SS		 1641 if (link->network->allmulticast >= 0) {
1642 ifi_change |= IFF_ALLMULTI;
1643 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1644 }
1645
99d2baa2
SS		 1646 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1647 if (r < 0)
1648 return log_link_error_errno(link, r, "Could not set link flags: %m");
1649
302a796f
YW		 1650 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1651 link_netlink_destroy_callback, link);
99d2baa2
SS		 1652 if (r < 0)
1653 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1654
1655 link_ref(link);
1656
1657 return 0;
1658}
1659
e7ab854c
TG		 1660static int link_acquire_ipv6_conf(Link *link) {
1661 int r;
1662
1663 assert(link);
1664
e7ab854c 1665 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1666 assert(link->ndisc);
e7ab854c
TG		 1667
1668 log_link_debug(link, "Discovering IPv6 routers");
1669
1e7a0e21 1670 r = sd_ndisc_start(link->ndisc);
63348d13 1671 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1672 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1673 }
1674
7465dd22
PF		 1675 if (link_radv_enabled(link)) {
1676 assert(link->radv);
1677 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1678
1679 log_link_debug(link, "Starting IPv6 Router Advertisements");
1680
fd3ef936
YW		 1681 r = radv_emit_dns(link);
1682 if (r < 0)
1683 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
1684
7465dd22
PF		 1685 r = sd_radv_start(link->radv);
1686 if (r < 0 && r != -EBUSY)
1687 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1688 }
1689
838d39af
SS		 1690 if (link_dhcp6_enabled(link) && IN_SET(link->network->dhcp6_without_ra,
1691 DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST,
1692 DHCP6_CLIENT_START_MODE_SOLICIT)) {
cd305af1
SS		 1693 assert(link->dhcp6_client);
1694 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1695
838d39af 1696 r = dhcp6_request_address(link, link->network->dhcp6_without_ra == DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST);
cd305af1 1697 if (r < 0 && r != -EBUSY)
1633c457 1698 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
cd305af1
SS		 1699 else
1700 log_link_debug(link, "Acquiring DHCPv6 lease");
1701 }
1702
1633c457
YW		 1703 r = dhcp6_request_prefix_delegation(link);
1704 if (r < 0)
1705 return log_link_warning_errno(link, r, "Failed to request DHCPv6 prefix delegation: %m");
10752343 1706
e7ab854c
TG		 1707 return 0;
1708}
1709
6fc25497 1710static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1711 int r;
1712
1713 assert(link);
ff254138
TG		 1714 assert(link->manager);
1715 assert(link->manager->event);
1716
910feb78 1717 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1718 assert(link->ipv4ll);
ff254138 1719
6a7a4e4d 1720 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1721
1722 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1723 if (r < 0)
1724 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1725 }
1726
78c958f8 1727 if (link_dhcp4_enabled(link)) {
eb34d4af 1728 assert(link->dhcp_client);
ff254138 1729
6a7a4e4d 1730 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1731
5c1d3fc9 1732 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1733 if (r < 0)
1734 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1735 }
ff254138 1736
6fc25497
SS		 1737 return 0;
1738}
1739
1740static int link_acquire_conf(Link *link) {
1741 int r;
1742
1743 assert(link);
1744
1745 r = link_acquire_ipv4_conf(link);
1746 if (r < 0)
1747 return r;
1748
3f7cc080 1749 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1750 r = link_acquire_ipv6_conf(link);
1751 if (r < 0)
1752 return r;
1753 }
1754
7272b25e
LP		 1755 if (link_lldp_emit_enabled(link)) {
1756 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1757 if (r < 0)
1758 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1759 }
1760
ff254138
TG		 1761 return 0;
1762}
1763
a61bb41c 1764bool link_has_carrier(Link *link) {
deb2e523
TG		 1765 /* see Documentation/networking/operstates.txt in the kernel sources */
1766
a61bb41c 1767 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1768 return true;
1769
a61bb41c 1770 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1771 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1772 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1773 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1774 return true;
1775
1776 return false;
1777}
1778
0e2fdb83
SS		 1779static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1780 int r;
1781
1782 assert(link);
1783
9524014e
DS		 1784 link->setting_genmode = false;
1785
0e2fdb83
SS		 1786 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1787 return 1;
1788
1789 r = sd_netlink_message_get_errno(m);
1790 if (r < 0)
5ecb131d 1791 log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring");
9524014e
DS		 1792 else
1793 log_link_debug(link, "Setting address genmode done.");
1794
1795 if (link->state == LINK_STATE_INITIALIZED) {
1796 r = link_configure_continue(link);
1797 if (r < 0)
1798 link_enter_failed(link);
1799 }
0e2fdb83
SS		 1800
1801 return 1;
1802}
1803
1804static int link_configure_addrgen_mode(Link *link) {
1805 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1806 uint8_t ipv6ll_mode;
1807 int r;
1808
1809 assert(link);
1810 assert(link->network);
1811 assert(link->manager);
1812 assert(link->manager->rtnl);
1813
9524014e 1814 if (!socket_ipv6_is_supported() || link->setting_genmode)
9f6e82e6
YW		 1815 return 0;
1816
0e2fdb83
SS		 1817 log_link_debug(link, "Setting address genmode for link");
1818
1819 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1820 if (r < 0)
1821 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1822
1823 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1824 if (r < 0)
1825 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1826
1827 r = sd_netlink_message_open_container(req, AF_INET6);
1828 if (r < 0)
1829 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1830
1831 if (!link_ipv6ll_enabled(link))
1832 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
6f6296b9 1833 else if (link->network->ipv6ll_address_gen_mode < 0) {
a6f1848a
SS		 1834 r = sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL);
1835 if (r < 0) {
1836 /* The file may not exist. And even if it exists, when stable_secret is unset,
1837 * reading the file fails with EIO. */
1838 log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret: %m");
1839
1840 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1841 } else
1842 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1843 } else
6f6296b9 1844 ipv6ll_mode = link->network->ipv6ll_address_gen_mode;
0e2fdb83
SS		 1845
1846 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1847 if (r < 0)
1848 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1849
1850 r = sd_netlink_message_close_container(req);
1851 if (r < 0)
1852 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1853
1854 r = sd_netlink_message_close_container(req);
1855 if (r < 0)
1856 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1857
1858 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1859 link_netlink_destroy_callback, link);
1860 if (r < 0)
1861 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1862
1863 link_ref(link);
9524014e 1864 link->setting_genmode = true;
0e2fdb83
SS		 1865
1866 return 0;
1867}
1868
302a796f 1869static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1870 int r;
1871
1746cf2a
TG		 1872 assert(link);
1873
5da8149f 1874 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1875 return 1;
1876
1c4baffc 1877 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1878 if (r < 0)
26d6b214 1879 /* we warn but don't fail the link, as it may be brought up later */
5ecb131d 1880 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
45ad2c13 1881
f882c247
TG		 1882 return 1;
1883}
1884
1cc84f3b 1885static int link_up(Link *link) {
4afd3348 1886 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1887 int r;
1888
f882c247 1889 assert(link);
c106cc36 1890 assert(link->network);
f882c247
TG		 1891 assert(link->manager);
1892 assert(link->manager->rtnl);
1893
6a7a4e4d 1894 log_link_debug(link, "Bringing link up");
449f7554 1895
6a7a4e4d
LP		 1896 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1897 if (r < 0)
1898 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1899
2b2d8603 1900 /* set it free if not enslaved with networkd */
6cb955c6 1901 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1902 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1903 if (r < 0)
1904 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1905 }
1906
5d4795f3 1907 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1908 if (r < 0)
1909 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1910
c106cc36 1911 if (link->network->mac) {
1c4baffc 1912 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1913 if (r < 0)
1914 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1915 }
1916
302a796f
YW		 1917 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1918 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1919 if (r < 0)
1920 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1921
b226d99b
TG		 1922 link_ref(link);
1923
f882c247
TG		 1924 return 0;
1925}
1926
302a796f 1927static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1928 int r;
1929
1930 assert(link);
1931
1932 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1933 return 1;
1934
1c4baffc 1935 r = sd_netlink_message_get_errno(m);
0d4ad91d 1936 if (r < 0)
5ecb131d 1937 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
0d4ad91d
AR		 1938
1939 return 1;
1940}
1941
8e54db83 1942int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1943 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1944 int r;
1945
1946 assert(link);
1947 assert(link->manager);
1948 assert(link->manager->rtnl);
1949
6a7a4e4d 1950 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1951
1952 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1953 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1954 if (r < 0)
1955 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1956
1957 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1958 if (r < 0)
1959 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1960
8e54db83
YW		 1961 r = netlink_call_async(link->manager->rtnl, NULL, req,
1962 callback ?: link_down_handler,
302a796f 1963 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1964 if (r < 0)
1965 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1966
1967 link_ref(link);
1968
1969 return 0;
1970}
1971
89fe6535
SS		 1972static int link_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1973 int r;
1974
1975 assert(link);
1976
1977 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1978 return 1;
1979
1980 r = sd_netlink_message_get_errno(m);
1981 if (r < 0)
1982 log_link_message_warning_errno(link, m, r, "Could not set group for the interface");
1983
1984 return 1;
1985}
1986
1987static int link_set_group(Link *link) {
1988 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1989 int r;
1990
1991 assert(link);
1992 assert(link->network);
1993 assert(link->manager);
1994 assert(link->manager->rtnl);
1995
1996 if (link->network->group <= 0)
1997 return 0;
1998
1999 log_link_debug(link, "Setting group");
2000
2001 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
2002 if (r < 0)
2003 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
2004
2005 r = sd_netlink_message_append_u32(req, IFLA_GROUP, link->network->group);
2006 if (r < 0)
2007 return log_link_error_errno(link, r, "Could not set link group: %m");
2008
2009 r = netlink_call_async(link->manager->rtnl, NULL, req, link_group_handler,
2010 link_netlink_destroy_callback, link);
2011 if (r < 0)
2012 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
2013
2014 link_ref(link);
2015
2016 return 0;
2017}
2018
0d4ad91d
AR		 2019static int link_handle_bound_to_list(Link *link) {
2020 Link *l;
2021 Iterator i;
2022 int r;
2023 bool required_up = false;
2024 bool link_is_up = false;
2025
2026 assert(link);
2027
2028 if (hashmap_isempty(link->bound_to_links))
2029 return 0;
2030
2031 if (link->flags & IFF_UP)
2032 link_is_up = true;
2033
2034 HASHMAP_FOREACH (l, link->bound_to_links, i)
2035 if (link_has_carrier(l)) {
2036 required_up = true;
2037 break;
2038 }
2039
2040 if (!required_up && link_is_up) {
8e54db83 2041 r = link_down(link, NULL);
0d4ad91d
AR		 2042 if (r < 0)
2043 return r;
2044 } else if (required_up && !link_is_up) {
2045 r = link_up(link);
2046 if (r < 0)
2047 return r;
2048 }
2049
2050 return 0;
2051}
2052
2053static int link_handle_bound_by_list(Link *link) {
2054 Iterator i;
2055 Link *l;
2056 int r;
2057
2058 assert(link);
2059
2060 if (hashmap_isempty(link->bound_by_links))
2061 return 0;
2062
2063 HASHMAP_FOREACH (l, link->bound_by_links, i) {
2064 r = link_handle_bound_to_list(l);
2065 if (r < 0)
2066 return r;
2067 }
2068
2069 return 0;
2070}
2071
2072static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
2073 int r;
2074
2075 assert(link);
2076 assert(carrier);
2077
2078 if (link == carrier)
2079 return 0;
2080
2081 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
2082 return 0;
2083
2084 r = hashmap_ensure_allocated(h, NULL);
2085 if (r < 0)
2086 return r;
2087
2088 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
2089 if (r < 0)
2090 return r;
2091
2092 return 0;
2093}
2094
2095static int link_new_bound_by_list(Link *link) {
2096 Manager *m;
2097 Link *carrier;
2098 Iterator i;
2099 int r;
2100 bool list_updated = false;
2101
2102 assert(link);
2103 assert(link->manager);
2104
2105 m = link->manager;
2106
b295beea 2107 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 2108 if (!carrier->network)
2109 continue;
2110
2111 if (strv_isempty(carrier->network->bind_carrier))
2112 continue;
2113
191a3f16 2114 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 2115 r = link_put_carrier(link, carrier, &link->bound_by_links);
2116 if (r < 0)
2117 return r;
2118
2119 list_updated = true;
2120 }
2121 }
2122
2123 if (list_updated)
84de38c5 2124 link_dirty(link);
0d4ad91d 2125
b295beea 2126 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 2127 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2128 if (r < 0)
2129 return r;
2130
84de38c5 2131 link_dirty(carrier);
0d4ad91d
AR		 2132 }
2133
2134 return 0;
2135}
2136
2137static int link_new_bound_to_list(Link *link) {
2138 Manager *m;
2139 Link *carrier;
2140 Iterator i;
2141 int r;
2142 bool list_updated = false;
2143
2144 assert(link);
2145 assert(link->manager);
2146
2147 if (!link->network)
2148 return 0;
2149
2150 if (strv_isempty(link->network->bind_carrier))
2151 return 0;
2152
2153 m = link->manager;
2154
2155 HASHMAP_FOREACH (carrier, m->links, i) {
191a3f16 2156 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 2157 r = link_put_carrier(link, carrier, &link->bound_to_links);
2158 if (r < 0)
2159 return r;
2160
2161 list_updated = true;
2162 }
2163 }
2164
2165 if (list_updated)
84de38c5 2166 link_dirty(link);
0d4ad91d
AR		 2167
2168 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2169 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2170 if (r < 0)
2171 return r;
2172
84de38c5 2173 link_dirty(carrier);
0d4ad91d
AR		 2174 }
2175
2176 return 0;
2177}
2178
2179static int link_new_carrier_maps(Link *link) {
2180 int r;
2181
2182 r = link_new_bound_by_list(link);
2183 if (r < 0)
2184 return r;
2185
2186 r = link_handle_bound_by_list(link);
2187 if (r < 0)
2188 return r;
2189
2190 r = link_new_bound_to_list(link);
2191 if (r < 0)
2192 return r;
2193
2194 r = link_handle_bound_to_list(link);
2195 if (r < 0)
2196 return r;
2197
2198 return 0;
2199}
2200
2201static void link_free_bound_to_list(Link *link) {
2202 Link *bound_to;
2203 Iterator i;
2204
2205 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2206 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2207
2208 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2209 link_dirty(bound_to);
0d4ad91d
AR		 2210 }
2211
2212 return;
2213}
2214
2215static void link_free_bound_by_list(Link *link) {
2216 Link *bound_by;
2217 Iterator i;
2218
2219 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2220 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2221
2222 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2223 link_dirty(bound_by);
0d4ad91d
AR		 2224 link_handle_bound_to_list(bound_by);
2225 }
2226 }
2227
2228 return;
2229}
2230
2231static void link_free_carrier_maps(Link *link) {
2232 bool list_updated = false;
2233
2234 assert(link);
2235
2236 if (!hashmap_isempty(link->bound_to_links)) {
2237 link_free_bound_to_list(link);
2238 list_updated = true;
2239 }
2240
2241 if (!hashmap_isempty(link->bound_by_links)) {
2242 link_free_bound_by_list(link);
2243 list_updated = true;
2244 }
2245
2246 if (list_updated)
84de38c5 2247 link_dirty(link);
0d4ad91d
AR		 2248
2249 return;
2250}
2251
5f707e12
YW		 2252static int link_append_to_master(Link *link, NetDev *netdev) {
2253 Link *master;
2254 int r;
2255
2256 assert(link);
2257 assert(netdev);
2258
2259 r = link_get(link->manager, netdev->ifindex, &master);
2260 if (r < 0)
2261 return r;
2262
de7fef4b 2263 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 2264 if (r <= 0)
5f707e12
YW		 2265 return r;
2266
2267 link_ref(link);
2268 return 0;
2269}
2270
2271static void link_drop_from_master(Link *link, NetDev *netdev) {
2272 Link *master;
2273
2274 assert(link);
2275
2276 if (!link->manager || !netdev)
2277 return;
2278
2279 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2280 return;
2281
2282 link_unref(set_remove(master->slaves, link));
2283}
2284
2285static void link_detach_from_manager(Link *link) {
2286 if (!link || !link->manager)
2287 return;
2288
2289 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2290 link_clean(link);
2291
2292 /* The following must be called at last. */
2293 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2294 link_unref(link);
2295}
2296
0d4ad91d
AR		 2297void link_drop(Link *link) {
2298 if (!link || link->state == LINK_STATE_LINGER)
2299 return;
2300
2301 link_set_state(link, LINK_STATE_LINGER);
2302
2303 link_free_carrier_maps(link);
2304
5f707e12
YW		 2305 if (link->network) {
2306 link_drop_from_master(link, link->network->bridge);
2307 link_drop_from_master(link, link->network->bond);
2308 }
2309
6a7a4e4d 2310 log_link_debug(link, "Link removed");
0d4ad91d 2311
db2f8a2e 2312 (void) unlink(link->state_file);
c4397d94 2313 link_detach_from_manager(link);
0d4ad91d
AR		 2314}
2315
3f265037 2316static int link_joined(Link *link) {
f882c247
TG		 2317 int r;
2318
ef1ba606 2319 assert(link);
f5be5601 2320 assert(link->network);
dd3efc09 2321
0d4ad91d
AR		 2322 if (!hashmap_isempty(link->bound_to_links)) {
2323 r = link_handle_bound_to_list(link);
2324 if (r < 0)
2325 return r;
2326 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2327 r = link_up(link);
2328 if (r < 0) {
2329 link_enter_failed(link);
2330 return r;
2331 }
ef1ba606 2332 }
f882c247 2333
9ed794a3 2334 if (link->network->bridge) {
e1853b00 2335 r = link_set_bridge(link);
6a7a4e4d
LP		 2336 if (r < 0)
2337 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 2338
2339 r = link_append_to_master(link, link->network->bridge);
2340 if (r < 0)
2341 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 2342 }
2343
eb64b435 2344 if (link->network->bond) {
7fcee284 2345 r = link_set_bond(link);
eb64b435
SS		 2346 if (r < 0)
2347 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2348
45e11abf 2349 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2350 if (r < 0)
2351 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2352 }
2353
ffff9abe
TJ		 2354 if (link->network->use_br_vlan &&
2355 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2356 r = link_set_bridge_vlan(link);
2357 if (r < 0)
2358 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2359 }
2360
c1835a42
RM		 2361 /* Skip setting up addresses until it gets carrier,
2362 or it would try to set addresses twice,
2363 which is bad for non-idempotent steps. */
dad2d78e 2364 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2365 return 0;
2366
b425c3ae 2367 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 2368 return link_request_set_addresses(link);
02b59d57
TG		 2369}
2370
302a796f 2371static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2372 int r;
2373
1746cf2a 2374 assert(link);
ef1ba606 2375 assert(link->network);
34bf3c00 2376 assert(link->enslaving > 0);
02b59d57 2377
313cefa1 2378 link->enslaving--;
52433f6b 2379
5da8149f 2380 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2381 return 1;
2382
1c4baffc 2383 r = sd_netlink_message_get_errno(m);
856f962c 2384 if (r < 0 && r != -EEXIST) {
5ecb131d 2385 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG		 2386 link_enter_failed(link);
2387 return 1;
4ff296b0
YW		 2388 }
2389
2390 log_link_debug(link, "Joined netdev");
02b59d57 2391
34bf3c00 2392 if (link->enslaving == 0) {
4ff296b0
YW		 2393 r = link_joined(link);
2394 if (r < 0)
2395 link_enter_failed(link);
34bf3c00 2396 }
02b59d57
TG		 2397
2398 return 1;
2399}
2400
3f265037 2401static int link_enter_join_netdev(Link *link) {
6a0a2f86 2402 NetDev *netdev;
672682a6 2403 Iterator i;
02b59d57
TG		 2404 int r;
2405
2406 assert(link);
2407 assert(link->network);
bd08ce56 2408 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2409
289e6774 2410 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2411
84de38c5 2412 link_dirty(link);
34bf3c00 2413 link->enslaving = 0;
02b59d57 2414
d9c67ea1 2415 if (link->network->bond) {
cbff7170
TJ		 2416 if (link->network->bond->state == NETDEV_STATE_READY &&
2417 link->network->bond->ifindex == link->master_ifindex)
2418 return link_joined(link);
2419
f2341e0a
LP		 2420 log_struct(LOG_DEBUG,
2421 LOG_LINK_INTERFACE(link),
2422 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2423 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2424
34bf3c00
YW		 2425 link->enslaving++;
2426
f2341e0a 2427 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2428 if (r < 0) {
f2341e0a
LP		 2429 log_struct_errno(LOG_WARNING, r,
2430 LOG_LINK_INTERFACE(link),
2431 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2432 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2433 link_enter_failed(link);
2434 return r;
2435 }
0ad6148e
MO		 2436 }
2437
d9c67ea1 2438 if (link->network->bridge) {
f2341e0a
LP		 2439 log_struct(LOG_DEBUG,
2440 LOG_LINK_INTERFACE(link),
2441 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2442 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2443
34bf3c00
YW		 2444 link->enslaving++;
2445
f2341e0a 2446 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2447 if (r < 0) {
f2341e0a
LP		 2448 log_struct_errno(LOG_WARNING, r,
2449 LOG_LINK_INTERFACE(link),
2450 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2451 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2452 link_enter_failed(link);
2453 return r;
2454 }
52433f6b
TG		 2455 }
2456
6cb955c6
AR		 2457 if (link->network->vrf) {
2458 log_struct(LOG_DEBUG,
2459 LOG_LINK_INTERFACE(link),
2460 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2461 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2462
34bf3c00
YW		 2463 link->enslaving++;
2464
6cb955c6
AR		 2465 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2466 if (r < 0) {
2467 log_struct_errno(LOG_WARNING, r,
2468 LOG_LINK_INTERFACE(link),
2469 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2470 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2471 link_enter_failed(link);
2472 return r;
2473 }
6cb955c6
AR		 2474 }
2475
6a0a2f86 2476 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2477
2b6db913
YW		 2478 if (netdev->ifindex > 0)
2479 /* Assume already enslaved. */
a63e5daa 2480 continue;
a63e5daa 2481
7033af49
YW		 2482 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2483 continue;
2484
f2341e0a
LP		 2485 log_struct(LOG_DEBUG,
2486 LOG_LINK_INTERFACE(link),
2487 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2488 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2489
34bf3c00
YW		 2490 link->enslaving++;
2491
f2341e0a 2492 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2493 if (r < 0) {
f2341e0a
LP		 2494 log_struct_errno(LOG_WARNING, r,
2495 LOG_LINK_INTERFACE(link),
2496 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2497 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2498 link_enter_failed(link);
2499 return r;
2500 }
326cb406
SS		 2501 }
2502
34bf3c00
YW		 2503 if (link->enslaving == 0)
2504 return link_joined(link);
2505
ef1ba606
TG		 2506 return 0;
2507}
2508
769d324c 2509static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2510 int r;
2511
765afd5c 2512 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2513 return 0;
2514
765afd5c
LP		 2515 /* We propagate the forwarding flag from one interface to the
2516 * global setting one way. This means: as long as at least one
2517 * interface was configured at any time that had IP forwarding
2518 * enabled the setting will stay on for good. We do this
2519 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2520 * somewhat in sync (see below). */
15dee3f0 2521
62e021a9 2522 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2523 if (r < 0)
765afd5c 2524 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2525
769d324c
LP		 2526 return 0;
2527}
2528
2529static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2530 int r;
2531
765afd5c 2532 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2533 return 0;
2534
61233823 2535 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2536 * packet forwarding setting: either packet forwarding is on
2537 * for all, or off for all. We hence don't bother with a
2538 * per-interface setting, but simply propagate the interface
2539 * flag, if it is set, to the global flag, one-way. Note that
2540 * while IPv4 would allow a per-interface flag, we expose the
2541 * same behaviour there and also propagate the setting from
2542 * one to all, to keep things simple (see above). */
15dee3f0 2543
62e021a9 2544 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2545 if (r < 0)
765afd5c 2546 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2547
2548 return 0;
2549}
2550
49092e22 2551static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2552 IPv6PrivacyExtensions s;
49092e22
SS		 2553 int r;
2554
1f0d9695 2555 s = link_ipv6_privacy_extensions(link);
66a6bd68 2556 if (s < 0)
49092e22
SS		 2557 return 0;
2558
62e021a9 2559 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2560 if (r < 0)
49092e22
SS		 2561 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2562
2563 return 0;
2564}
2565
4f2e437a 2566static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2567 int r;
2568
2569 /* Make this a NOP if IPv6 is not available */
2570 if (!socket_ipv6_is_supported())
2571 return 0;
2572
2573 if (link->flags & IFF_LOOPBACK)
2574 return 0;
2575
d68e2e59
LP		 2576 if (!link->network)
2577 return 0;
2578
62e021a9 2579 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2580 if (r < 0)
fe307276 2581 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2582
2583 return 0;
2584}
2585
8749cbcd 2586static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2587 int r;
2588
2589 /* Make this a NOP if IPv6 is not available */
2590 if (!socket_ipv6_is_supported())
2591 return 0;
2592
2593 if (link->flags & IFF_LOOPBACK)
2594 return 0;
2595
d68e2e59
LP		 2596 if (!link->network)
2597 return 0;
2598
8749cbcd
SS		 2599 if (link->network->ipv6_dad_transmits < 0)
2600 return 0;
2601
62e021a9 2602 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2603 if (r < 0)
8749cbcd 2604 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2605
2606 return 0;
2607}
2608
b69c3180 2609static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2610 int r;
2611
2612 /* Make this a NOP if IPv6 is not available */
2613 if (!socket_ipv6_is_supported())
2614 return 0;
2615
2616 if (link->flags & IFF_LOOPBACK)
2617 return 0;
2618
d68e2e59
LP		 2619 if (!link->network)
2620 return 0;
2621
b69c3180
SS		 2622 if (link->network->ipv6_hop_limit < 0)
2623 return 0;
2624
62e021a9 2625 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2626 if (r < 0)
b69c3180 2627 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2628
2629 return 0;
2630}
2631
11102cba 2632static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2633 int r;
2634
2635 /* Make this a NOP if IPv6 is not available */
2636 if (!socket_ipv6_is_supported())
2637 return 0;
2638
2639 if (link->flags & IFF_LOOPBACK)
2640 return 0;
2641
2642 if (link->network->ipv6_mtu == 0)
2643 return 0;
2644
d236718c
DS		 2645 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
2646 * on the interface. Bump up IPv6 MTU bytes to IPV6_MTU_MIN. */
2647 if (link->network->ipv6_mtu < IPV6_MIN_MTU) {
2648 log_link_notice(link, "Bumping IPv6 MTU to "STRINGIFY(IPV6_MIN_MTU)" byte minimum required");
2649 link->network->ipv6_mtu = IPV6_MIN_MTU;
2650 }
2651
62e021a9 2652 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
d236718c
DS		 2653 if (r < 0) {
2654 if (link->mtu < link->network->ipv6_mtu)
2655 log_link_warning(link, "Cannot set IPv6 MTU %"PRIu32" higher than device MTU %"PRIu32,
2656 link->network->ipv6_mtu, link->mtu);
2657 else
2658 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2659 }
2660
2661 link->ipv6_mtu_set = true;
11102cba
SS		 2662
2663 return 0;
2664}
2665
94d76d07
YW		 2666static int link_set_ipv4_accept_local(Link *link) {
2667 int r;
2668
2669 if (link->flags & IFF_LOOPBACK)
2670 return 0;
2671
2672 if (link->network->ipv4_accept_local < 0)
2673 return 0;
2674
2675 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "accept_local", link->network->ipv4_accept_local);
2676 if (r < 0)
2677 log_link_warning_errno(link, r, "Cannot set IPv4 accept_local flag for interface: %m");
2678
2679 return 0;
2680}
2681
30226d27
TJ		 2682static bool link_is_static_address_configured(Link *link, Address *address) {
2683 Address *net_address;
2684
2685 assert(link);
2686 assert(address);
2687
2688 if (!link->network)
2689 return false;
2690
2691 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2692 if (address_equal(net_address, address))
2693 return true;
6f5d73ab
YW		 2694 else if (address->family == AF_INET6 && net_address->family == AF_INET6 &&
2695 in_addr_equal(AF_INET6, &address->in_addr, &net_address->in_addr_peer) > 0)
2696 return true;
30226d27
TJ		 2697
2698 return false;
2699}
2700
d1bdafd2
WKI		 2701static bool link_is_neighbor_configured(Link *link, Neighbor *neighbor) {
2702 Neighbor *net_neighbor;
2703
2704 assert(link);
2705 assert(neighbor);
2706
2707 if (!link->network)
2708 return false;
2709
2710 LIST_FOREACH(neighbors, net_neighbor, link->network->neighbors)
2711 if (neighbor_equal(net_neighbor, neighbor))
2712 return true;
2713
2714 return false;
2715}
2716
7ecf0c3e
TJ		 2717static bool link_is_static_route_configured(Link *link, Route *route) {
2718 Route *net_route;
2719
2720 assert(link);
2721 assert(route);
2722
2723 if (!link->network)
2724 return false;
2725
2726 LIST_FOREACH(routes, net_route, link->network->static_routes)
2727 if (route_equal(net_route, route))
2728 return true;
2729
2730 return false;
2731}
2732
db51778f
YW		 2733static bool link_address_is_dynamic(Link *link, Address *address) {
2734 Route *route;
2735 Iterator i;
2736
2737 assert(link);
2738 assert(address);
2739
2740 if (address->cinfo.ifa_prefered != CACHE_INFO_INFINITY_LIFE_TIME)
2741 return true;
2742
2743 /* Even when the address is leased from a DHCP server, networkd assign the address
2744 * without lifetime when KeepConfiguration=dhcp. So, let's check that we have
2745 * corresponding routes with RTPROT_DHCP. */
2746 SET_FOREACH(route, link->routes_foreign, i) {
2747 if (route->protocol != RTPROT_DHCP)
2748 continue;
2749
2750 if (address->family != route->family)
2751 continue;
2752
2753 if (in_addr_equal(address->family, &address->in_addr, &route->prefsrc))
2754 return true;
2755 }
2756
2757 return false;
2758}
2759
0917a271
DS		 2760static int link_enumerate_ipv6_tentative_addresses(Link *link) {
2761 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
2762 sd_netlink_message *addr;
2763 int r;
2764
2765 assert(link);
2766 assert(link->manager);
2767 assert(link->manager->rtnl);
2768
2769 r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_GETADDR, 0, AF_INET6);
2770 if (r < 0)
2771 return r;
2772
2773 r = sd_netlink_call(link->manager->rtnl, req, 0, &reply);
2774 if (r < 0)
2775 return r;
2776
2777 for (addr = reply; addr; addr = sd_netlink_message_next(addr)) {
2778 unsigned char flags;
2779 int ifindex;
2780
2781 r = sd_rtnl_message_addr_get_ifindex(addr, &ifindex);
2782 if (r < 0) {
2783 log_link_warning_errno(link, r, "rtnl: invalid ifindex, ignoring: %m");
2784 continue;
2785 } else if (link->ifindex != ifindex)
2786 continue;
2787
2788 r = sd_rtnl_message_addr_get_flags(addr, &flags);
2789 if (r < 0) {
2790 log_link_warning_errno(link, r, "rtnl: received address message with invalid flags, ignoring: %m");
2791 continue;
2792 } else if (!(flags & IFA_F_TENTATIVE))
2793 continue;
2794
2795 log_link_debug(link, "Found tentative ipv6 link-local address");
2796 (void) manager_rtnl_process_address(link->manager->rtnl, addr, link->manager);
2797 }
2798
2799 return 0;
2800}
2801
5e5b137a
TG		 2802static int link_drop_foreign_config(Link *link) {
2803 Address *address;
d1bdafd2 2804 Neighbor *neighbor;
5e5b137a
TG		 2805 Route *route;
2806 Iterator i;
2807 int r;
2808
0917a271
DS		 2809 /* The kernel doesn't notify us about tentative addresses;
2810 * so if ipv6ll is disabled, we need to enumerate them now so we can drop them below */
2811 if (!link_ipv6ll_enabled(link)) {
2812 r = link_enumerate_ipv6_tentative_addresses(link);
2813 if (r < 0)
2814 return r;
2815 }
2816
5e5b137a 2817 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2818 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2819 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
5e5b137a
TG		 2820 continue;
2821
db51778f 2822 if (link_address_is_dynamic(link, address)) {
b1b0b42e 2823 if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
db51778f 2824 continue;
b1b0b42e 2825 } else if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
db51778f
YW		 2826 continue;
2827
30226d27
TJ		 2828 if (link_is_static_address_configured(link, address)) {
2829 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2830 if (r < 0)
2831 return log_link_error_errno(link, r, "Failed to add address: %m");
2832 } else {
63ae0569 2833 r = address_remove(address, link, NULL);
30226d27
TJ		 2834 if (r < 0)
2835 return r;
2836 }
5e5b137a
TG		 2837 }
2838
d1bdafd2
WKI		 2839 SET_FOREACH(neighbor, link->neighbors_foreign, i) {
2840 if (link_is_neighbor_configured(link, neighbor)) {
2841 r = neighbor_add(link, neighbor->family, &neighbor->in_addr, &neighbor->lladdr, neighbor->lladdr_size, NULL);
2842 if (r < 0)
2843 return r;
2844 } else {
2845 r = neighbor_remove(neighbor, link, NULL);
2846 if (r < 0)
2847 return r;
2848 }
2849 }
2850
5e5b137a 2851 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2852 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2853 if (route->protocol == RTPROT_KERNEL)
2854 continue;
2855
bd7d6cec
YW		 2856 /* do not touch multicast route added by kernel */
2857 /* FIXME: Why the kernel adds this route with protocol RTPROT_BOOT??? We need to investigate that.
2858 * https://tools.ietf.org/html/rfc4862#section-5.4 may explain why. */
2859 if (route->protocol == RTPROT_BOOT &&
2860 route->family == AF_INET6 &&
2861 route->dst_prefixlen == 8 &&
2862 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 }}} }))
2863 continue;
2864
b1b0b42e 2865 if (route->protocol == RTPROT_STATIC && link->network &&
db51778f
YW		 2866 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2867 continue;
2868
b1b0b42e 2869 if (route->protocol == RTPROT_DHCP && link->network &&
db51778f
YW		 2870 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2871 continue;
2872
7ecf0c3e 2873 if (link_is_static_route_configured(link, route)) {
f1368755 2874 r = route_add(link, route, NULL);
7ecf0c3e
TJ		 2875 if (r < 0)
2876 return r;
2877 } else {
4645ad47 2878 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2879 if (r < 0)
2880 return r;
2881 }
5e5b137a
TG		 2882 }
2883
2884 return 0;
2885}
2886
3104883d 2887static int link_drop_config(Link *link) {
410a7f15 2888 Address *address, *pool_address;
d1bdafd2 2889 Neighbor *neighbor;
3104883d
SS		 2890 Route *route;
2891 Iterator i;
2892 int r;
2893
2894 SET_FOREACH(address, link->addresses, i) {
2895 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2896 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
3104883d
SS		 2897 continue;
2898
63ae0569 2899 r = address_remove(address, link, NULL);
3104883d
SS		 2900 if (r < 0)
2901 return r;
410a7f15
RM		 2902
2903 /* If this address came from an address pool, clean up the pool */
b6766fb1 2904 LIST_FOREACH(addresses, pool_address, link->pool_addresses)
410a7f15
RM		 2905 if (address_equal(address, pool_address)) {
2906 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2907 address_free(pool_address);
2908 break;
2909 }
3104883d
SS		 2910 }
2911
d1bdafd2
WKI		 2912 SET_FOREACH(neighbor, link->neighbors, i) {
2913 r = neighbor_remove(neighbor, link, NULL);
2914 if (r < 0)
2915 return r;
2916 }
2917
3104883d
SS		 2918 SET_FOREACH(route, link->routes, i) {
2919 /* do not touch routes managed by the kernel */
2920 if (route->protocol == RTPROT_KERNEL)
2921 continue;
2922
4645ad47 2923 r = route_remove(route, link, NULL);
3104883d
SS		 2924 if (r < 0)
2925 return r;
2926 }
2927
c69305ff
LP		 2928 ndisc_flush(link);
2929
3104883d
SS		 2930 return 0;
2931}
2932
051e77ca
SS		 2933static int link_configure_ipv4_dad(Link *link) {
2934 Address *address;
2935 int r;
2936
2937 assert(link);
2938 assert(link->network);
2939
2940 LIST_FOREACH(addresses, address, link->network->static_addresses)
2941 if (address->family == AF_INET &&
2942 FLAGS_SET(address->duplicate_address_detection, ADDRESS_FAMILY_IPV4)) {
2943 r = configure_ipv4_duplicate_address_detection(link, address);
2944 if (r < 0)
2945 return log_link_error_errno(link, r, "Failed to configure IPv4ACD: %m");
2946 }
2947
2948 return 0;
2949}
2950
34658df2
YW		 2951static int link_configure_traffic_control(Link *link) {
2952 TrafficControl *tc;
0f5bd7fe 2953 Iterator i;
02b59d57
TG		 2954 int r;
2955
34658df2
YW		 2956 link->tc_configured = false;
2957 link->tc_messages = 0;
4ecdcb07 2958
34658df2
YW		 2959 ORDERED_HASHMAP_FOREACH(tc, link->network->tc_by_section, i) {
2960 r = traffic_control_configure(link, tc);
4ecdcb07
YW		 2961 if (r < 0)
2962 return r;
2963 }
2964
34658df2
YW		 2965 if (link->tc_messages == 0)
2966 link->tc_configured = true;
4ecdcb07 2967 else
34658df2 2968 log_link_debug(link, "Configuring traffic control");
4ecdcb07
YW		 2969
2970 return 0;
2971}
2972
518cd6b5
SS		 2973static int link_configure_sr_iov(Link *link) {
2974 SRIOV *sr_iov;
2975 Iterator i;
2976 int r;
2977
2978 link->sr_iov_configured = false;
2979 link->sr_iov_messages = 0;
2980
2981 ORDERED_HASHMAP_FOREACH(sr_iov, link->network->sr_iov_by_section, i) {
2982 r = sr_iov_configure(link, sr_iov);
2983 if (r < 0)
2984 return r;
2985 }
2986
2987 if (link->sr_iov_messages == 0)
2988 link->sr_iov_configured = true;
2989 else
2990 log_link_debug(link, "Configuring SR-IOV");
2991
2992 return 0;
2993}
2994
4ecdcb07
YW		 2995static int link_configure(Link *link) {
2996 int r;
2997
ef1ba606 2998 assert(link);
b22d8a00 2999 assert(link->network);
bd08ce56 3000 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 3001
34658df2 3002 r = link_configure_traffic_control(link);
4ecdcb07
YW		 3003 if (r < 0)
3004 return r;
3005
518cd6b5
SS		 3006 r = link_configure_sr_iov(link);
3007 if (r < 0)
3008 return r;
3009
500b96eb 3010 if (link->iftype == ARPHRD_CAN)
93ea7750 3011 return link_configure_can(link);
92c918b0 3012
482efedc
SS		 3013 /* If IPv6 configured that is static IPv6 address and IPv6LL autoconfiguration is enabled
3014 * for this interface, then enable IPv6 */
57ad7607 3015 (void) link_update_ipv6_sysctl(link);
482efedc 3016
23d8b221
SS		 3017 r = link_set_proxy_arp(link);
3018 if (r < 0)
3019 return r;
3020
a0e5c15d
FK		 3021 r = ipv6_proxy_ndp_addresses_configure(link);
3022 if (r < 0)
3023 return r;
3024
769d324c
LP		 3025 r = link_set_ipv4_forward(link);
3026 if (r < 0)
3027 return r;
3028
3029 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 3030 if (r < 0)
3031 return r;
3032
49092e22
SS		 3033 r = link_set_ipv6_privacy_extensions(link);
3034 if (r < 0)
3035 return r;
3036
4f2e437a
SS		 3037 r = link_set_ipv6_accept_ra(link);
3038 if (r < 0)
3039 return r;
3040
8749cbcd
SS		 3041 r = link_set_ipv6_dad_transmits(link);
3042 if (r < 0)
3043 return r;
b69c3180
SS		 3044
3045 r = link_set_ipv6_hop_limit(link);
3046 if (r < 0)
3047 return r;
8749cbcd 3048
94d76d07
YW		 3049 r = link_set_ipv4_accept_local(link);
3050 if (r < 0)
3051 return r;
3052
99d2baa2
SS		 3053 r = link_set_flags(link);
3054 if (r < 0)
3055 return r;
3056
89fe6535
SS		 3057 r = link_set_group(link);
3058 if (r < 0)
3059 return r;
3060
910feb78 3061 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
b22d8a00 3062 r = ipv4ll_configure(link);
eb34d4af
TG		 3063 if (r < 0)
3064 return r;
3065 }
3066
78c958f8 3067 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 3068 r = dhcp4_set_promote_secondaries(link);
3069 if (r < 0)
3070 return r;
3071
3c9b8860 3072 r = dhcp4_configure(link);
eb34d4af
TG		 3073 if (r < 0)
3074 return r;
eb34d4af
TG		 3075 }
3076
78c958f8 3077 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 3078 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
3079 if (r < 0)
3080 return r;
3081
3082 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
3083 if (r < 0)
3084 return r;
dd43110f
TG		 3085 }
3086
62379e88
TG		 3087 if (link_dhcp6_enabled(link) ||
3088 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 3089 r = dhcp6_configure(link);
3090 if (r < 0)
3091 return r;
3092 }
3093
3094 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 3095 r = ndisc_configure(link);
4138fb2c
PF		 3096 if (r < 0)
3097 return r;
3098 }
3099
7465dd22
PF		 3100 if (link_radv_enabled(link)) {
3101 r = radv_configure(link);
3102 if (r < 0)
3103 return r;
3104 }
3105
8e1ad1ea 3106 if (link_lldp_rx_enabled(link)) {
7f853950 3107 r = link_lldp_rx_configure(link);
273eec24
LP		 3108 if (r < 0)
3109 return r;
ce43e484
SS		 3110 }
3111
f6fcc1c2 3112 r = link_configure_mtu(link);
40288ece
YW		 3113 if (r < 0)
3114 return r;
44b598a1 3115
9f6e82e6
YW		 3116 r = link_configure_addrgen_mode(link);
3117 if (r < 0)
3118 return r;
0e2fdb83 3119
051e77ca
SS		 3120 r = link_configure_ipv4_dad(link);
3121 if (r < 0)
3122 return r;
3123
3a390124
DS		 3124 return link_configure_continue(link);
3125}
3126
3127/* The configuration continues in this separate function, instead of
3128 * including this in the above link_configure() function, for two
3129 * reasons:
3130 * 1) some devices reset the link when the mtu is set, which caused
3131 * an infinite loop here in networkd; see:
3132 * https://github.com/systemd/systemd/issues/6593
3133 * https://github.com/systemd/systemd/issues/9831
3134 * 2) if ipv6ll is disabled, then bringing the interface up must be
3135 * delayed until after we get confirmation from the kernel that
3136 * the addr_gen_mode parameter has been set (via netlink), see:
3137 * https://github.com/systemd/systemd/issues/13882
3138 */
3139static int link_configure_continue(Link *link) {
55dc8c4a
YW		 3140 int r;
3141
3142 assert(link);
3143 assert(link->network);
bd08ce56 3144 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a 3145
9524014e 3146 if (link->setting_mtu || link->setting_genmode)
55dc8c4a
YW		 3147 return 0;
3148
4c649652
DS		 3149 /* Drop foreign config, but ignore loopback or critical devices.
3150 * We do not want to remove loopback address or addresses used for root NFS. */
3151 if (!(link->flags & IFF_LOOPBACK) &&
3152 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
3153 r = link_drop_foreign_config(link);
3154 if (r < 0)
3155 return r;
3156 }
3157
d236718c
DS		 3158 /* The kernel resets ipv6 mtu after changing device mtu;
3159 * we must set this here, after we've set device mtu */
3160 r = link_set_ipv6_mtu(link);
3161 if (r < 0)
3162 return r;
3163
dad2d78e 3164 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 3165 r = link_acquire_conf(link);
3166 if (r < 0)
3167 return r;
cc544d5f 3168 }
1e9be60b 3169
3f265037 3170 return link_enter_join_netdev(link);
505f8da7
TG		 3171}
3172
27dfc982
YW		 3173static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
3174 assert(duid);
3175
3176 if (duid->raw_data_len > 0)
3177 return 0;
3178
3179 if (duid->type != DUID_TYPE_UUID)
3180 return -EINVAL;
3181
3182 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
3183 duid->raw_data_len = sizeof(sd_id128_t);
3184
3185 return 1;
3186}
3187
3188int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
3189 Manager *manager = userdata;
3190 const sd_bus_error *e;
3191 const void *a;
3192 size_t sz;
3193 DUID *duid;
3194 Link *link;
3195 int r;
3196
3197 assert(m);
3198 assert(manager);
3199
3200 e = sd_bus_message_get_error(m);
3201 if (e) {
3202 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 3203 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 3204 e->message);
3205 goto configure;
3206 }
3207
3208 r = sd_bus_message_read_array(m, 'y', &a, &sz);
3209 if (r < 0)
3210 goto configure;
3211
3212 if (sz != sizeof(sd_id128_t)) {
ab4dd984 3213 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 3214 goto configure;
3215 }
3216
3217 memcpy(&manager->product_uuid, a, sz);
3218 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
3219 (void) duid_set_uuid(duid, manager->product_uuid);
3220
3221 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
3222
3223configure:
3224 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3dc2e7af
YW		 3225 link_unref(link);
3226
27dfc982
YW		 3227 r = link_configure(link);
3228 if (r < 0)
4ff296b0 3229 link_enter_failed(link);
27dfc982
YW		 3230 }
3231
3232 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
3233
3234 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
3235 * even if the method fails. */
3236 manager->has_product_uuid = true;
3237
3238 return 1;
3239}
3240
3241static bool link_requires_uuid(Link *link) {
3242 const DUID *duid;
3243
3244 assert(link);
3245 assert(link->manager);
3246 assert(link->network);
3247
3248 duid = link_get_duid(link);
3249 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
3250 return false;
3251
3252 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
3253 return true;
3254
3255 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
3256 return true;
3257
3258 return false;
3259}
3260
3261static int link_configure_duid(Link *link) {
3262 Manager *m;
3263 DUID *duid;
3264 int r;
3265
3266 assert(link);
3267 assert(link->manager);
3268 assert(link->network);
3269
3270 m = link->manager;
3271 duid = link_get_duid(link);
3272
3273 if (!link_requires_uuid(link))
3274 return 1;
3275
3276 if (m->has_product_uuid) {
3277 (void) duid_set_uuid(duid, m->product_uuid);
3278 return 1;
3279 }
3280
3281 if (!m->links_requesting_uuid) {
3282 r = manager_request_product_uuid(m, link);
3283 if (r < 0) {
3284 if (r == -ENOMEM)
3285 return r;
3286
ab4dd984
ZJS		 3287 log_link_warning_errno(link, r,
3288 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 3289 return 1;
3290 }
3291 } else {
3292 r = set_put(m->links_requesting_uuid, link);
3293 if (r < 0)
3294 return log_oom();
39dbd0c7
ZJS		 3295 if (r > 0)
3296 link_ref(link);
27dfc982
YW		 3297
3298 r = set_put(m->duids_requesting_uuid, duid);
3299 if (r < 0)
3300 return log_oom();
3301 }
3302
3303 return 0;
3304}
3305
572b21d9 3306static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
ad932b15
YW		 3307 Network *network;
3308 int r;
3309
572b21d9
YW		 3310 if (m) {
3311 _cleanup_strv_free_ char **s = NULL;
3312
3313 r = sd_netlink_message_get_errno(m);
3314 if (r < 0)
3315 return r;
3316
3317 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3318 if (r < 0 && r != -ENODATA)
3319 return r;
3320
3321 strv_free_and_replace(link->alternative_names, s);
3322 }
3323
c643bda5
YW		 3324 r = network_get(link->manager, link->iftype, link->sd_device,
3325 link->ifname, link->alternative_names, link->driver,
3326 &link->mac, &link->permanent_mac,
3327 link->wlan_iftype, link->ssid, &link->bssid, &network);
ad932b15
YW		 3328 if (r == -ENOENT) {
3329 link_enter_unmanaged(link);
3330 return 0;
3331 } else if (r == 0 && network->unmanaged) {
3332 link_enter_unmanaged(link);
3333 return 0;
3334 } else if (r < 0)
3335 return r;
3336
99b8517c 3337 if (link->network == network && !force)
ad932b15
YW		 3338 return 0;
3339
3340 log_link_info(link, "Re-configuring with %s", network->filename);
3341
3342 /* Dropping old .network file */
3343 r = link_stop_clients(link, false);
572b21d9 3344 if (r < 0)
ad932b15 3345 return r;
ad932b15
YW		 3346
3347 if (link_dhcp4_server_enabled(link))
3348 (void) sd_dhcp_server_stop(link->dhcp_server);
3349
3350 r = link_drop_config(link);
3351 if (r < 0)
3352 return r;
3353
2c7b826d 3354 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
ad932b15
YW		 3355 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
3356 r = link_drop_foreign_config(link);
3357 if (r < 0)
3358 return r;
3359 }
3360
3361 link_free_carrier_maps(link);
3362 link_free_engines(link);
3363 link->network = network_unref(link->network);
3364
3365 /* Then, apply new .network file */
3366 r = network_apply(network, link);
3367 if (r < 0)
3368 return r;
3369
3370 r = link_new_carrier_maps(link);
3371 if (r < 0)
3372 return r;
3373
3374 link_set_state(link, LINK_STATE_INITIALIZED);
8ae7b8a1 3375 link_dirty(link);
ad932b15
YW		 3376
3377 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3378 * link_configure() is called later asynchronously. */
3379 r = link_configure_duid(link);
3380 if (r <= 0)
3381 return r;
3382
3383 r = link_configure(link);
3384 if (r < 0)
3385 return r;
3386
3387 return 0;
3388}
3389
572b21d9
YW		 3390static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3391 int r;
3392
3393 r = link_reconfigure_internal(link, m, false);
3394 if (r < 0)
3395 link_enter_failed(link);
3396
3397 return 1;
3398}
3399
3400static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3401 int r;
3402
3403 r = link_reconfigure_internal(link, m, true);
3404 if (r < 0)
3405 link_enter_failed(link);
3406
3407 return 1;
3408}
3409
3410int link_reconfigure(Link *link, bool force) {
3411 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
3412 int r;
3413
2c0d7ed3
YW		 3414 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
3415 return 0;
3416
572b21d9
YW		 3417 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3418 link->ifindex);
3419 if (r < 0)
3420 return r;
3421
3422 r = netlink_call_async(link->manager->rtnl, NULL, req,
3423 force ? link_force_reconfigure_handler : link_reconfigure_handler,
3424 link_netlink_destroy_callback, link);
3425 if (r < 0)
3426 return r;
3427
3428 link_ref(link);
3429
3430 return 0;
3431}
3432
e6bf7774 3433static int link_initialized_and_synced(Link *link) {
505f8da7 3434 Network *network;
505f8da7
TG		 3435 int r;
3436
3437 assert(link);
3438 assert(link->ifname);
3439 assert(link->manager);
3440
bd08ce56
YW		 3441 /* We may get called either from the asynchronous netlink callback,
3442 * or directly for link_add() if running in a container. See link_add(). */
3443 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 3444 return 0;
505f8da7 3445
6a7a4e4d 3446 log_link_debug(link, "Link state is up-to-date");
bd08ce56 3447 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 3448
0d4ad91d
AR		 3449 r = link_new_bound_by_list(link);
3450 if (r < 0)
3451 return r;
3452
3453 r = link_handle_bound_by_list(link);
3454 if (r < 0)
3455 return r;
3456
c4a03a56 3457 if (!link->network) {
0894cfe4 3458 r = wifi_get_info(link);
8d968fdd
YW		 3459 if (r < 0)
3460 return r;
3461
c643bda5
YW		 3462 r = network_get(link->manager, link->iftype, link->sd_device,
3463 link->ifname, link->alternative_names, link->driver,
3464 &link->mac, &link->permanent_mac,
3465 link->wlan_iftype, link->ssid, &link->bssid, &network);
c4a03a56
TG		 3466 if (r == -ENOENT) {
3467 link_enter_unmanaged(link);
4232cf04 3468 return 0;
a09dc546
DM		 3469 } else if (r == 0 && network->unmanaged) {
3470 link_enter_unmanaged(link);
3471 return 0;
c4a03a56
TG		 3472 } else if (r < 0)
3473 return r;
505f8da7 3474
c4a03a56
TG		 3475 if (link->flags & IFF_LOOPBACK) {
3476 if (network->link_local != ADDRESS_FAMILY_NO)
3477 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3478
c4a03a56
TG		 3479 if (network->dhcp != ADDRESS_FAMILY_NO)
3480 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3481
c4a03a56
TG		 3482 if (network->dhcp_server)
3483 log_link_debug(link, "Ignoring DHCP server for loopback link");
3484 }
bd2efe92 3485
7d342c03 3486 r = network_apply(network, link);
c4a03a56
TG		 3487 if (r < 0)
3488 return r;
3489 }
505f8da7 3490
0d4ad91d
AR		 3491 r = link_new_bound_to_list(link);
3492 if (r < 0)
3493 return r;
3494
27dfc982
YW		 3495 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3496 * link_configure() is called later asynchronously. */
3497 r = link_configure_duid(link);
3498 if (r <= 0)
3499 return r;
3500
a748b692
TG		 3501 r = link_configure(link);
3502 if (r < 0)
3503 return r;
3504
4232cf04 3505 return 0;
505f8da7
TG		 3506}
3507
302a796f 3508static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
572b21d9 3509 _cleanup_strv_free_ char **s = NULL;
4ff296b0
YW		 3510 int r;
3511
572b21d9
YW		 3512 r = sd_netlink_message_get_errno(m);
3513 if (r < 0) {
40681e5c 3514 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 3515 link_enter_failed(link);
3516 return 0;
3517 }
3518
3519 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3520 if (r < 0 && r != -ENODATA) {
3521 link_enter_failed(link);
3522 return 0;
3523 }
3524
3525 strv_free_and_replace(link->alternative_names, s);
3526
4ff296b0
YW		 3527 r = link_initialized_and_synced(link);
3528 if (r < 0)
3529 link_enter_failed(link);
e6bf7774
YW		 3530 return 1;
3531}
3532
51517f9e 3533int link_initialized(Link *link, sd_device *device) {
4afd3348 3534 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3535 int r;
3536
3537 assert(link);
3538 assert(link->manager);
3539 assert(link->manager->rtnl);
3540 assert(device);
3541
8434fd5c 3542 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3543 return 0;
3544
51517f9e 3545 if (link->sd_device)
679b3605
TG		 3546 return 0;
3547
79008bdd 3548 log_link_debug(link, "udev initialized link");
bd08ce56 3549 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 3550
51517f9e 3551 link->sd_device = sd_device_ref(device);
4f561e8e 3552
3c9b8860
TG		 3553 /* udev has initialized the link, but we don't know if we have yet
3554 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3555 * when it returns we know that the pending NEWLINKs have already been
3556 * processed and that we are up-to-date */
4f561e8e 3557
3c9b8860
TG		 3558 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3559 link->ifindex);
4f561e8e
TG		 3560 if (r < 0)
3561 return r;
3562
302a796f
YW		 3563 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3564 link_netlink_destroy_callback, link);
4f561e8e
TG		 3565 if (r < 0)
3566 return r;
3567
5da8149f
TG		 3568 link_ref(link);
3569
4f561e8e
TG		 3570 return 0;
3571}
3572
c4a03a56 3573static int link_load(Link *link) {
0bc70f1d
TG		 3574 _cleanup_free_ char *network_file = NULL,
3575 *addresses = NULL,
f703cc2c 3576 *routes = NULL,
0bc70f1d
TG		 3577 *dhcp4_address = NULL,
3578 *ipv4ll_address = NULL;
3579 union in_addr_union address;
c4a03a56
TG		 3580 int r;
3581
3582 assert(link);
3583
aa8fbc74 3584 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3585 "NETWORK_FILE", &network_file,
3586 "ADDRESSES", &addresses,
f703cc2c 3587 "ROUTES", &routes,
0bc70f1d 3588 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3589 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3590 if (r < 0 && r != -ENOENT)
3591 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3592
3593 if (network_file) {
3594 Network *network;
3595 char *suffix;
3596
3597 /* drop suffix */
3598 suffix = strrchr(network_file, '.');
3599 if (!suffix) {
3600 log_link_debug(link, "Failed to get network name from %s", network_file);
3601 goto network_file_fail;
3602 }
3603 *suffix = '\0';
3604
3605 r = network_get_by_name(link->manager, basename(network_file), &network);
3606 if (r < 0) {
3607 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3608 goto network_file_fail;
3609 }
3610
7d342c03 3611 r = network_apply(network, link);
c4a03a56
TG		 3612 if (r < 0)
3613 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3614 }
3615
3616network_file_fail:
3617
1f68f772
ZJS		 3618 for (const char *p = addresses; p; ) {
3619 _cleanup_free_ char *address_str = NULL;
3620 char *prefixlen_str;
3621 int family;
3622 unsigned char prefixlen;
c4a03a56 3623
1f68f772
ZJS		 3624 r = extract_first_word(&p, &address_str, NULL, 0);
3625 if (r < 0)
3626 log_link_warning_errno(link, r, "failed to parse ADDRESSES: %m");
3627 if (r <= 0)
3628 break;
c4a03a56 3629
1f68f772
ZJS		 3630 prefixlen_str = strchr(address_str, '/');
3631 if (!prefixlen_str) {
3632 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
3633 continue;
3634 }
3635 *prefixlen_str++ = '\0';
c4a03a56 3636
1f68f772
ZJS		 3637 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3638 if (r != 1) {
3639 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3640 continue;
3641 }
c4a03a56 3642
1f68f772
ZJS		 3643 r = in_addr_from_string_auto(address_str, &family, &address);
3644 if (r < 0) {
3645 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
3646 continue;
c4a03a56 3647 }
c4a03a56 3648
1f68f772
ZJS		 3649 r = address_add(link, family, &address, prefixlen, NULL);
3650 if (r < 0)
3651 return log_link_error_errno(link, r, "Failed to add address: %m");
3652 }
74544b4e 3653
1f68f772
ZJS		 3654 for (const char *p = routes; p; ) {
3655 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
3656 _cleanup_(route_freep) Route *tmp = NULL;
3657 _cleanup_free_ char *route_str = NULL;
3658 char *prefixlen_str;
3659 Route *route;
f703cc2c 3660
1f68f772
ZJS		 3661 r = extract_first_word(&p, &route_str, NULL, 0);
3662 if (r < 0)
3663 log_link_debug_errno(link, r, "failed to parse ROUTES: %m");
3664 if (r <= 0)
3665 break;
c598ac76 3666
1f68f772
ZJS		 3667 prefixlen_str = strchr(route_str, '/');
3668 if (!prefixlen_str) {
3669 log_link_debug(link, "Failed to parse route %s", route_str);
3670 continue;
3671 }
3672 *prefixlen_str++ = '\0';
f703cc2c 3673
1f68f772
ZJS		 3674 r = route_new(&tmp);
3675 if (r < 0)
3676 return log_oom();
f703cc2c 3677
1f68f772
ZJS		 3678 r = sscanf(prefixlen_str,
3679 "%hhu/%hhu/%"SCNu32"/%"PRIu32"/"USEC_FMT,
3680 &tmp->dst_prefixlen,
3681 &tmp->tos,
3682 &tmp->priority,
3683 &tmp->table,
3684 &tmp->lifetime);
3685 if (r != 5) {
3686 log_link_debug(link,
3687 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3688 prefixlen_str);
3689 continue;
3690 }
f1368755 3691
1f68f772
ZJS		 3692 r = in_addr_from_string_auto(route_str, &tmp->family, &tmp->dst);
3693 if (r < 0) {
3694 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
3695 continue;
3696 }
f703cc2c 3697
1f68f772
ZJS		 3698 r = route_add(link, tmp, &route);
3699 if (r < 0)
3700 return log_link_error_errno(link, r, "Failed to add route: %m");
f703cc2c 3701
1f68f772
ZJS		 3702 if (route->lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
3703 r = sd_event_add_time(link->manager->event, &expire,
3704 clock_boottime_or_monotonic(),
3705 route->lifetime, 0, route_expire_handler, route);
f703cc2c 3706 if (r < 0)
1f68f772 3707 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
f703cc2c 3708 }
1f68f772
ZJS		 3709
3710 sd_event_source_unref(route->expire);
3711 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3712 }
3713
0bc70f1d
TG		 3714 if (dhcp4_address) {
3715 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3716 if (r < 0) {
b68d26b8 3717 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3718 goto dhcp4_address_fail;
3719 }
3720
b1c626f6 3721 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3722 if (r < 0)
b68d26b8 3723 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d 3724
1b43e246
DS		 3725 r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0);
3726 if (r < 0)
3727 return log_link_error_errno(link, r, "Failed to attach DHCPv4 event: %m");
3728
0bc70f1d
TG		 3729 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3730 if (r < 0)
b68d26b8 3731 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3732 }
3733
3734dhcp4_address_fail:
3735
3736 if (ipv4ll_address) {
3737 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3738 if (r < 0) {
b68d26b8 3739 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3740 goto ipv4ll_address_fail;
3741 }
3742
3743 r = sd_ipv4ll_new(&link->ipv4ll);
3744 if (r < 0)
b68d26b8 3745 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d 3746
1b43e246
DS		 3747 r = sd_ipv4ll_attach_event(link->ipv4ll, NULL, 0);
3748 if (r < 0)
3749 return log_link_error_errno(link, r, "Failed to attach IPv4LL event: %m");
3750
0bc70f1d
TG		 3751 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3752 if (r < 0)
b68d26b8 3753 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3754 }
3755
3756ipv4ll_address_fail:
3757
c4a03a56
TG		 3758 return 0;
3759}
3760
1c4baffc 3761int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3762 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3763 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3764 Link *link;
5a937ea2 3765 int r;
505f8da7
TG		 3766
3767 assert(m);
fbbeb65a 3768 assert(m->rtnl);
505f8da7
TG		 3769 assert(message);
3770 assert(ret);
3771
3772 r = link_new(m, message, ret);
3773 if (r < 0)
3774 return r;
3775
3776 link = *ret;
3777
6a7a4e4d 3778 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3779
c4a03a56
TG		 3780 r = link_load(link);
3781 if (r < 0)
3782 return r;
3783
bf331d87
YW		 3784 if (path_is_read_only_fs("/sys") <= 0) {
3785 /* udev should be around */
ae06ab10 3786 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3787 r = sd_device_new_from_device_id(&device, ifindex_str);
3788 if (r < 0) {
4d59e14f
YW		 3789 log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m");
3790 return 0;
5c416fc4 3791 }
505f8da7 3792
5a937ea2 3793 r = sd_device_get_is_initialized(device);
51517f9e 3794 if (r < 0) {
bf331d87 3795 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 3796 goto failed;
3797 }
5a937ea2 3798 if (r == 0) {
505f8da7 3799 /* not yet ready */
79008bdd 3800 log_link_debug(link, "link pending udev initialization...");
505f8da7 3801 return 0;
3c4cb064 3802 }
505f8da7 3803
299ad32d
YW		 3804 r = device_is_renaming(device);
3805 if (r < 0) {
bf331d87 3806 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 3807 goto failed;
3808 }
3809 if (r > 0) {
bf331d87 3810 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 3811 return 0;
3812 }
3813
4f561e8e
TG		 3814 r = link_initialized(link, device);
3815 if (r < 0)
5c416fc4 3816 goto failed;
4f561e8e 3817 } else {
e6bf7774 3818 r = link_initialized_and_synced(link);
4f561e8e 3819 if (r < 0)
5c416fc4 3820 goto failed;
4f561e8e 3821 }
505f8da7 3822
a748b692 3823 return 0;
5c416fc4
TG		 3824failed:
3825 link_enter_failed(link);
3826 return r;
a748b692
TG		 3827}
3828
c601ebf7 3829int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3830 int r;
3831
3832 assert(link);
3833
3834 log_link_info(link, "Gained IPv6LL");
3835
c601ebf7 3836 link->ipv6ll_address = *address;
e7ab854c
TG		 3837 link_check_ready(link);
3838
b9ea3d2e 3839 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3840 r = link_acquire_ipv6_conf(link);
3841 if (r < 0) {
3842 link_enter_failed(link);
3843 return r;
3844 }
3845 }
3846
3847 return 0;
3848}
3849
9c0a72f9
TG		 3850static int link_carrier_gained(Link *link) {
3851 int r;
3852
3853 assert(link);
3854
0894cfe4 3855 r = wifi_get_info(link);
8d968fdd
YW		 3856 if (r < 0)
3857 return r;
3858 if (r > 0) {
572b21d9
YW		 3859 r = link_reconfigure_internal(link, NULL, false);
3860 if (r < 0) {
3861 link_enter_failed(link);
8d968fdd 3862 return r;
572b21d9 3863 }
8d968fdd
YW		 3864 }
3865
b9ea3d2e 3866 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3867 r = link_acquire_conf(link);
3868 if (r < 0) {
3869 link_enter_failed(link);
3870 return r;
3871 }
6fc25497 3872
b425c3ae 3873 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 3874 r = link_request_set_addresses(link);
6fc25497
SS		 3875 if (r < 0)
3876 return r;
9c0a72f9
TG		 3877 }
3878
0d4ad91d
AR		 3879 r = link_handle_bound_by_list(link);
3880 if (r < 0)
3881 return r;
3882
9c0a72f9
TG		 3883 return 0;
3884}
3885
3886static int link_carrier_lost(Link *link) {
3887 int r;
3888
3889 assert(link);
3890
25e992ba 3891 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3892 return 0;
3893
fbdb6605 3894 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3895 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3896 * configuration and stop the clients as well. */
97e7fb39
SS		 3897 if (link->setting_mtu)
3898 return 0;
3899
95355a28 3900 r = link_stop_clients(link, false);
9c0a72f9
TG		 3901 if (r < 0) {
3902 link_enter_failed(link);
3903 return r;
3904 }
3905
28464ae0
SS		 3906 if (link_dhcp4_server_enabled(link))
3907 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3908
3104883d
SS		 3909 r = link_drop_config(link);
3910 if (r < 0)
3911 return r;
3912
2c7b826d 3913 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
f258e948 3914 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3915 r = link_drop_foreign_config(link);
3916 if (r < 0)
3917 return r;
3918 }
3104883d 3919
0d4ad91d
AR		 3920 r = link_handle_bound_by_list(link);
3921 if (r < 0)
3922 return r;
3923
9c0a72f9
TG		 3924 return 0;
3925}
3926
3927int link_carrier_reset(Link *link) {
3928 int r;
3929
3930 assert(link);
3931
3932 if (link_has_carrier(link)) {
3933 r = link_carrier_lost(link);
3934 if (r < 0)
3935 return r;
3936
3937 r = link_carrier_gained(link);
3938 if (r < 0)
3939 return r;
3940
6a7a4e4d 3941 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3942 }
3943
3944 return 0;
3945}
3946
d236718c
DS		 3947/* This is called every time an interface admin state changes to up;
3948 * specifically, when IFF_UP flag changes from unset to set */
3949static int link_admin_state_up(Link *link) {
3950 int r;
3951
3952 /* We set the ipv6 mtu after the device mtu, but the kernel resets
3953 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
3954 * ipv6_mtu_set prevents this from trying to set it too early before
3955 * the link->network has been setup; we only need to reset it
3956 * here if we've already set it during normal initialization. */
3957 if (link->ipv6_mtu_set) {
3958 r = link_set_ipv6_mtu(link);
3959 if (r < 0)
3960 return r;
3961 }
3962
3963 return 0;
3964}
3965
1c4baffc 3966int link_update(Link *link, sd_netlink_message *m) {
572b21d9 3967 _cleanup_strv_free_ char **s = NULL;
c49b33ac 3968 struct ether_addr mac;
ca4e095a 3969 const char *ifname;
afe7fd56 3970 uint32_t mtu;
d236718c 3971 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 3972 int old_master, r;
22936833 3973
dd3efc09 3974 assert(link);
b8941f74 3975 assert(link->ifname);
22936833
TG		 3976 assert(m);
3977
7619683b 3978 if (link->state == LINK_STATE_LINGER) {
5238e957 3979 log_link_info(link, "Link re-added");
289e6774 3980 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3981
3982 r = link_new_carrier_maps(link);
3983 if (r < 0)
3984 return r;
7619683b
TG		 3985 }
3986
1c4baffc 3987 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3988 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3989 Manager *manager = link->manager;
b8941f74 3990
30de2b89 3991 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3992
30de2b89
YW		 3993 link_drop(link);
3994 r = link_add(manager, m, &link);
3995 if (r < 0)
3996 return r;
b8941f74
TG		 3997 }
3998
572b21d9
YW		 3999 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
4000 if (r >= 0)
4001 strv_free_and_replace(link->alternative_names, s);
4002
1c4baffc 4003 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 4004 if (r >= 0 && mtu > 0) {
4005 link->mtu = mtu;
4e964aa0 4006 if (link->original_mtu == 0) {
afe7fd56 4007 link->original_mtu = mtu;
6a7a4e4d 4008 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 4009 }
4010
4011 if (link->dhcp_client) {
3c9b8860
TG		 4012 r = sd_dhcp_client_set_mtu(link->dhcp_client,
4013 link->mtu);
fc95c359
YW		 4014 if (r < 0)
4015 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 4016 }
7465dd22
PF		 4017
4018 if (link->radv) {
4019 r = sd_radv_set_mtu(link->radv, link->mtu);
4020 if (r < 0)
4021 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
4022 }
9842de0d 4023 }
69629de9 4024
e9189a1f
TG		 4025 /* The kernel may broadcast NEWLINK messages without the MAC address
4026 set, simply ignore them. */
1c4baffc 4027 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
807667f7
YW		 4028 if (r >= 0 && memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN) != 0) {
4029
4030 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN);
4031
4032 log_link_debug(link, "Gained new MAC address: "
4033 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
4034 mac.ether_addr_octet[0],
4035 mac.ether_addr_octet[1],
4036 mac.ether_addr_octet[2],
4037 mac.ether_addr_octet[3],
4038 mac.ether_addr_octet[4],
4039 mac.ether_addr_octet[5]);
4040
4041 if (link->ipv4ll) {
4042 bool restart = sd_ipv4ll_is_running(link->ipv4ll) > 0;
4043
4044 if (restart) {
4045 r = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 4046 if (r < 0)
807667f7 4047 return log_link_warning_errno(link, r, "Could not stop IPv4LL client: %m");
c49b33ac 4048 }
c49b33ac 4049
807667f7
YW		 4050 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
4051 if (r < 0)
4052 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
4053
4054 if (restart) {
4055 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d 4056 if (r < 0)
807667f7
YW		 4057 return log_link_warning_errno(link, r, "Could not restart IPv4LL client: %m");
4058 }
4059 }
4060
4061 if (link->dhcp_client) {
4062 r = sd_dhcp_client_set_mac(link->dhcp_client,
4063 (const uint8_t *) &link->mac,
4064 sizeof (link->mac),
4065 ARPHRD_ETHER);
4066 if (r < 0)
4067 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
4068
4069 r = dhcp4_set_client_identifier(link);
4070 if (r < 0)
4071 return log_link_warning_errno(link, r, "Could not set DHCP client identifier: %m");
4072 }
413708d1 4073
807667f7
YW		 4074 if (link->dhcp6_client) {
4075 const DUID* duid = link_get_duid(link);
4076 bool restart = sd_dhcp6_client_is_running(link->dhcp6_client) > 0;
4077
4078 if (restart) {
4079 r = sd_dhcp6_client_stop(link->dhcp6_client);
fff1f40c 4080 if (r < 0)
807667f7 4081 return log_link_warning_errno(link, r, "Could not stop DHCPv6 client: %m");
c49b33ac 4082 }
4138fb2c 4083
807667f7
YW		 4084 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
4085 (const uint8_t *) &link->mac,
4086 sizeof (link->mac),
4087 ARPHRD_ETHER);
4088 if (r < 0)
4089 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
8341a5c3 4090
807667f7
YW		 4091 if (link->network->iaid_set) {
4092 r = sd_dhcp6_client_set_iaid(link->dhcp6_client, link->network->iaid);
6a7a4e4d 4093 if (r < 0)
807667f7
YW		 4094 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
4095 }
4096
4097 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
4098 duid->type,
4099 duid->raw_data_len > 0 ? duid->raw_data : NULL,
4100 duid->raw_data_len);
4101 if (r < 0)
4102 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4103
4104 if (restart) {
4105 r = sd_dhcp6_client_start(link->dhcp6_client);
413708d1 4106 if (r < 0)
807667f7 4107 return log_link_warning_errno(link, r, "Could not restart DHCPv6 client: %m");
4138fb2c 4108 }
807667f7 4109 }
7465dd22 4110
807667f7
YW		 4111 if (link->radv) {
4112 bool restart = sd_radv_is_running(link->radv);
4113
4114 if (restart) {
4115 r = sd_radv_stop(link->radv);
7465dd22 4116 if (r < 0)
807667f7 4117 return log_link_warning_errno(link, r, "Could not stop Router Advertisement: %m");
7465dd22 4118 }
420d2058 4119
807667f7
YW		 4120 r = sd_radv_set_mac(link->radv, &link->mac);
4121 if (r < 0)
4122 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
4123
4124 if (restart) {
4125 r = sd_radv_start(link->radv);
420d2058 4126 if (r < 0)
807667f7 4127 return log_link_warning_errno(link, r, "Could not restart Router Advertisement: %m");
420d2058 4128 }
c49b33ac 4129 }
807667f7
YW		 4130
4131 if (link->ndisc) {
4132 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
4133 if (r < 0)
4134 return log_link_warning_errno(link, r, "Could not update MAC for NDisc: %m");
4135 }
4f882b2a
TG		 4136 }
4137
bb262ef0
YW		 4138 old_master = link->master_ifindex;
4139 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
4140
d236718c 4141 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 4142 had_carrier = link_has_carrier(link);
4143
bb262ef0 4144 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 4145 if (r < 0)
4146 return r;
4147
d236718c
DS		 4148 if (!link_was_admin_up && (link->flags & IFF_UP)) {
4149 log_link_info(link, "Link UP");
4150
4151 r = link_admin_state_up(link);
4152 if (r < 0)
4153 return r;
4154 } else if (link_was_admin_up && !(link->flags & IFF_UP))
4155 log_link_info(link, "Link DOWN");
4156
273eec24
LP		 4157 r = link_update_lldp(link);
4158 if (r < 0)
4159 return r;
4160
a61bb41c
TG		 4161 carrier_gained = !had_carrier && link_has_carrier(link);
4162 carrier_lost = had_carrier && !link_has_carrier(link);
4163
4164 if (carrier_gained) {
6a7a4e4d 4165 log_link_info(link, "Gained carrier");
a61bb41c 4166
9c0a72f9
TG		 4167 r = link_carrier_gained(link);
4168 if (r < 0)
4169 return r;
a61bb41c 4170 } else if (carrier_lost) {
6a7a4e4d 4171 log_link_info(link, "Lost carrier");
a61bb41c 4172
9c0a72f9
TG		 4173 r = link_carrier_lost(link);
4174 if (r < 0)
a61bb41c 4175 return r;
a61bb41c
TG		 4176 }
4177
4178 return 0;
dd3efc09 4179}
fe8db0c5 4180
b295beea
LP		 4181static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
4182 bool space = false;
4183 Iterator i;
4184 Link *link;
4185
4186 assert(f);
4187 assert(prefix);
4188
4189 if (hashmap_isempty(h))
4190 return;
4191
0d536673 4192 fputs(prefix, f);
b295beea
LP		 4193 HASHMAP_FOREACH(link, h, i) {
4194 if (space)
0d536673 4195 fputc(' ', f);
b295beea
LP		 4196
4197 fprintf(f, "%i", link->ifindex);
4198 space = true;
4199 }
4200
0d536673 4201 fputc('\n', f);
b295beea
LP		 4202}
4203
64581765 4204static void link_save_dns(Link *link, FILE *f, struct in_addr_full **dns, unsigned n_dns, bool *space) {
dddc8d1e 4205 for (unsigned j = 0; j < n_dns; j++) {
e77bd3fd 4206 const char *str;
15761549 4207
64581765
YW		 4208 if (dns[j]->ifindex != 0 && dns[j]->ifindex != link->ifindex)
4209 continue;
4210
e77bd3fd
YW		 4211 str = in_addr_full_to_string(dns[j]);
4212 if (!str)
15761549 4213 continue;
15761549
YW		 4214
4215 if (*space)
4216 fputc(' ', f);
e77bd3fd 4217 fputs(str, f);
15761549
YW		 4218 *space = true;
4219 }
4220}
4221
d5e172d2
ZJS		 4222static void serialize_addresses(
4223 FILE *f,
4224 const char *lvalue,
4225 bool *space,
4226 char **addresses,
4227 sd_dhcp_lease *lease,
4228 bool conditional,
ddb82ec2 4229 sd_dhcp_lease_server_type what,
d5e172d2
ZJS		 4230 sd_dhcp6_lease *lease6,
4231 bool conditional6,
4232 int (*lease6_get_addr)(sd_dhcp6_lease*, const struct in6_addr**),
4233 int (*lease6_get_fqdn)(sd_dhcp6_lease*, char ***)) {
4234 int r;
4235
4236 bool _space = false;
4237 if (!space)
4238 space = &_space;
4239
4240 if (lvalue)
4241 fprintf(f, "%s=", lvalue);
4242 fputstrv(f, addresses, NULL, space);
4243
4244 if (lease && conditional) {
4245 const struct in_addr *lease_addresses;
4246
4247 r = sd_dhcp_lease_get_servers(lease, what, &lease_addresses);
4248 if (r > 0)
d8bff5cc 4249 serialize_in_addrs(f, lease_addresses, r, space, in4_addr_is_non_local);
d5e172d2
ZJS		 4250 }
4251
4252 if (lease6 && conditional6 && lease6_get_addr) {
4253 const struct in6_addr *in6_addrs;
4254
4255 r = lease6_get_addr(lease6, &in6_addrs);
d8bff5cc
ZJS		 4256 if (r > 0)
4257 serialize_in6_addrs(f, in6_addrs, r, space);
d5e172d2
ZJS		 4258 }
4259
4260 if (lease6 && conditional6 && lease6_get_fqdn) {
4261 char **in6_hosts;
4262
4263 r = lease6_get_fqdn(lease6, &in6_hosts);
4264 if (r > 0)
4265 fputstrv(f, in6_hosts, NULL, space);
4266 }
4267
4268 if (lvalue)
4269 fputc('\n', f);
4270}
4271
fe8db0c5 4272int link_save(Link *link) {
d361b373 4273 const char *admin_state, *oper_state, *carrier_state, *address_state;
68a8723c 4274 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 4275 _cleanup_fclose_ FILE *f = NULL;
c1eb9872 4276 Route *route;
18d8a2cf 4277 Address *a;
e7780c8d 4278 Iterator i;
fe8db0c5
TG		 4279 int r;
4280
4281 assert(link);
4282 assert(link->state_file);
68a8723c 4283 assert(link->lease_file);
bbf7c048
TG		 4284 assert(link->manager);
4285
370e9930 4286 if (link->state == LINK_STATE_LINGER) {
6990fb6b 4287 (void) unlink(link->state_file);
370e9930
TG		 4288 return 0;
4289 }
4290
34437b4f
LP		 4291 link_lldp_save(link);
4292
deb2e523
TG		 4293 admin_state = link_state_to_string(link->state);
4294 assert(admin_state);
4295
e375dcde
TG		 4296 oper_state = link_operstate_to_string(link->operstate);
4297 assert(oper_state);
deb2e523 4298
ac999bf0
YW		 4299 carrier_state = link_carrier_state_to_string(link->carrier_state);
4300 assert(carrier_state);
4301
4302 address_state = link_address_state_to_string(link->address_state);
4303 assert(address_state);
4304
fe8db0c5
TG		 4305 r = fopen_temporary(link->state_file, &f, &temp_path);
4306 if (r < 0)
6a7a4e4d 4307 goto fail;
fe8db0c5 4308
5512a963 4309 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 4310
4311 fprintf(f,
4312 "# This is private data. Do not parse.\n"
deb2e523 4313 "ADMIN_STATE=%s\n"
ac999bf0
YW		 4314 "OPER_STATE=%s\n"
4315 "CARRIER_STATE=%s\n"
4316 "ADDRESS_STATE=%s\n",
4317 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 4318
bcb7a07e 4319 if (link->network) {
fe0e16db
YW		 4320 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
4321 const char *dhcp_domainname = NULL, *p;
fe0e16db 4322 bool space;
07bdc70d 4323
c1a38904
MTL		 4324 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
4325 yes_no(link->network->required_for_online));
4326
d5e172d2
ZJS		 4327 LinkOperationalStateRange st = link->network->required_operstate_for_online;
4328 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s%s%s\n",
4329 strempty(link_operstate_to_string(st.min)),
4330 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? ":" : "",
4331 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? strempty(link_operstate_to_string(st.max)) : "");
4ac77d63 4332
adc5b2e2
TG		 4333 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
4334
d5e172d2
ZJS		 4335 /************************************************************/
4336
0d536673 4337 fputs("DNS=", f);
ea352b40 4338 space = false;
15761549 4339 if (link->n_dns != (unsigned) -1)
64581765 4340 link_save_dns(link, f, link->dns, link->n_dns, &space);
15761549 4341 else
64581765 4342 link_save_dns(link, f, link->network->dns, link->network->n_dns, &space);
d5314fff 4343
d5e172d2
ZJS		 4344 serialize_addresses(f, NULL, &space,
4345 NULL,
4346 link->dhcp_lease,
4347 link->network->dhcp_use_dns,
ddb82ec2 4348 SD_DHCP_LEASE_DNS,
1633c457 4349 link->dhcp6_lease,
d5e172d2
ZJS		 4350 link->network->dhcp6_use_dns,
4351 sd_dhcp6_lease_get_dns,
4352 NULL);
1e7a0e21 4353
a8c10331 4354 /* Make sure to flush out old entries before we use the NDisc data */
1e7a0e21
LP		 4355 ndisc_vacuum(link);
4356
b296797f 4357 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 4358 NDiscRDNSS *dd;
4359
d8bff5cc
ZJS		 4360 SET_FOREACH(dd, link->ndisc_rdnss, i)
4361 serialize_in6_addrs(f, &dd->address, 1, &space);
299d578f
SS		 4362 }
4363
4364 fputc('\n', f);
4365
d5e172d2
ZJS		 4366 /************************************************************/
4367
4368 serialize_addresses(f, "NTP", NULL,
4369 link->ntp ?: link->network->ntp,
4370 link->dhcp_lease,
4371 link->network->dhcp_use_ntp,
ddb82ec2 4372 SD_DHCP_LEASE_NTP,
1633c457 4373 link->dhcp6_lease,
d5e172d2
ZJS		 4374 link->network->dhcp6_use_ntp,
4375 sd_dhcp6_lease_get_ntp_addrs,
4376 sd_dhcp6_lease_get_ntp_fqdn);
4377
4378 serialize_addresses(f, "SIP", NULL,
2a71d57f 4379 NULL,
d5e172d2
ZJS		 4380 link->dhcp_lease,
4381 link->network->dhcp_use_sip,
ddb82ec2 4382 SD_DHCP_LEASE_SIP,
2a71d57f 4383 NULL, false, NULL, NULL);
d5e172d2
ZJS		 4384
4385 /************************************************************/
bd8f6538 4386
b2a81c0b 4387 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 4388 if (link->dhcp_lease) {
b2a81c0b 4389 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 4390 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
4391 }
1633c457
YW		 4392 if (link->dhcp6_lease)
4393 (void) sd_dhcp6_lease_get_domains(link->dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 4394 }
4395
fe0e16db
YW		 4396 fputs("DOMAINS=", f);
4397 space = false;
15761549 4398 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains, i)
fe0e16db 4399 fputs_with_space(f, p, NULL, &space);
07bdc70d 4400
1e7a0e21 4401 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP		 4402 if (dhcp_domainname)
4403 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4404 if (dhcp_domains)
4405 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4406 if (dhcp6_domains)
4407 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 4408 }
4409
4410 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
4411 NDiscDNSSL *dd;
1e7a0e21
LP		 4412
4413 SET_FOREACH(dd, link->ndisc_dnssl, i)
4414 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4415 }
b2a81c0b 4416
0d536673 4417 fputc('\n', f);
6192b846 4418
d5e172d2
ZJS		 4419 /************************************************************/
4420
fe0e16db
YW		 4421 fputs("ROUTE_DOMAINS=", f);
4422 space = false;
15761549 4423 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains, i)
fe0e16db 4424 fputs_with_space(f, p, NULL, &space);
b2a81c0b 4425
1e7a0e21 4426 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
1e7a0e21
LP		 4427 if (dhcp_domainname)
4428 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4429 if (dhcp_domains)
4430 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4431 if (dhcp6_domains)
4432 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 4433 }
4434
4435 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
4436 NDiscDNSSL *dd;
1e7a0e21
LP		 4437
4438 SET_FOREACH(dd, link->ndisc_dnssl, i)
4439 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4440 }
b2a81c0b 4441
0d536673 4442 fputc('\n', f);
67272d15 4443
d5e172d2
ZJS		 4444 /************************************************************/
4445
3c9b8860 4446 fprintf(f, "LLMNR=%s\n",
15761549 4447 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
d5e172d2
ZJS		 4448
4449 /************************************************************/
4450
aaa297d4 4451 fprintf(f, "MDNS=%s\n",
15761549 4452 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
15761549 4453
d5e172d2
ZJS		 4454 /************************************************************/
4455
4456 int dns_default_route =
4457 link->dns_default_route >= 0 ? link->dns_default_route :
4458 link->network->dns_default_route;
4459 if (dns_default_route >= 0)
4460 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(dns_default_route));
4461
4462 /************************************************************/
4463
4464 DnsOverTlsMode dns_over_tls_mode =
4465 link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID ? link->dns_over_tls_mode :
4466 link->network->dns_over_tls_mode;
4467 if (dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
4468 fprintf(f, "DNS_OVER_TLS=%s\n", dns_over_tls_mode_to_string(dns_over_tls_mode));
4469
4470 /************************************************************/
4471
4472 DnssecMode dnssec_mode =
4473 link->dnssec_mode != _DNSSEC_MODE_INVALID ? link->dnssec_mode :
4474 link->network->dnssec_mode;
4475 if (dnssec_mode != _DNSSEC_MODE_INVALID)
4476 fprintf(f, "DNSSEC=%s\n", dnssec_mode_to_string(dnssec_mode));
4477
4478 /************************************************************/
4479
4480 Set *nta_anchors = link->dnssec_negative_trust_anchors;
4481 if (set_isempty(nta_anchors))
4482 nta_anchors = link->network->dnssec_negative_trust_anchors;
4483
4484 if (!set_isempty(nta_anchors)) {
8a516214
LP		 4485 const char *n;
4486
0d536673 4487 fputs("DNSSEC_NTA=", f);
8a516214 4488 space = false;
d5e172d2 4489 SET_FOREACH(n, nta_anchors, i)
d390f8ef 4490 fputs_with_space(f, n, NULL, &space);
0d536673 4491 fputc('\n', f);
8a516214
LP		 4492 }
4493
d5e172d2
ZJS		 4494 /************************************************************/
4495
0d536673 4496 fputs("ADDRESSES=", f);
e7780c8d
TG		 4497 space = false;
4498 SET_FOREACH(a, link->addresses, i) {
4499 _cleanup_free_ char *address_str = NULL;
4500
4501 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
4502 if (r < 0)
4503 goto fail;
4504
e7780c8d
TG		 4505 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
4506 space = true;
4507 }
0d536673 4508 fputc('\n', f);
c1eb9872 4509
d5e172d2
ZJS		 4510 /************************************************************/
4511
0d536673 4512 fputs("ROUTES=", f);
c1eb9872
TG		 4513 space = false;
4514 SET_FOREACH(route, link->routes, i) {
4515 _cleanup_free_ char *route_str = NULL;
4516
4517 r = in_addr_to_string(route->family, &route->dst, &route_str);
4518 if (r < 0)
4519 goto fail;
4520
ecc3f340
ZJS		 4521 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
4522 space ? " " : "", route_str,
f833694d 4523 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 4524 space = true;
4525 }
4526
0d536673 4527 fputc('\n', f);
bcb7a07e 4528 }
7374f9d8 4529
b295beea
LP		 4530 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
4531 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 4532
8eb9058d 4533 if (link->dhcp_lease) {
bd91b83e 4534 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 4535 if (r < 0)
c2d6bd61 4536 goto fail;
fe8db0c5 4537
7374f9d8 4538 fprintf(f,
b0e39c82
TG		 4539 "DHCP_LEASE=%s\n",
4540 link->lease_file);
deb2e523 4541 } else
6990fb6b 4542 (void) unlink(link->lease_file);
fe8db0c5 4543
0bc70f1d
TG		 4544 if (link->ipv4ll) {
4545 struct in_addr address;
4546
4547 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
4548 if (r >= 0) {
0d536673 4549 fputs("IPV4LL_ADDRESS=", f);
072320ea 4550 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 4551 fputc('\n', f);
0bc70f1d
TG		 4552 }
4553 }
4554
7e738e7b
SS		 4555 if (link->dhcp6_client) {
4556 _cleanup_free_ char *duid = NULL;
4557 uint32_t iaid;
4558
4559 r = sd_dhcp6_client_get_iaid(link->dhcp6_client, &iaid);
4560 if (r >= 0)
4561 fprintf(f, "DHCP6_CLIENT_IAID=0x%x\n", iaid);
4562
4563 r = sd_dhcp6_client_duid_as_string(link->dhcp6_client, &duid);
4564 if (r >= 0)
4565 fprintf(f, "DHCP6_CLIENT_DUID=%s\n", duid);
4566 }
18d8a2cf 4567
c2d6bd61
LP		 4568 r = fflush_and_check(f);
4569 if (r < 0)
4570 goto fail;
fe8db0c5 4571
c2d6bd61 4572 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 4573 r = -errno;
c2d6bd61 4574 goto fail;
fe8db0c5
TG		 4575 }
4576
c2d6bd61 4577 return 0;
dacd6cee 4578
c2d6bd61 4579fail:
6a7a4e4d 4580 (void) unlink(link->state_file);
6a7a4e4d
LP		 4581 if (temp_path)
4582 (void) unlink(temp_path);
4583
dacd6cee 4584 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 4585}
4586
84de38c5
TG		 4587/* The serialized state in /run is no longer up-to-date. */
4588void link_dirty(Link *link) {
4589 int r;
4590
4591 assert(link);
4592
0c241a37
SS		 4593 /* mark manager dirty as link is dirty */
4594 manager_dirty(link->manager);
4595
de7fef4b 4596 r = set_ensure_put(&link->manager->dirty_links, NULL, link);
0c241a37 4597 if (r <= 0)
de7fef4b 4598 /* Ignore allocation errors and don't take another ref if the link was already dirty */
84de38c5 4599 return;
84de38c5
TG		 4600 link_ref(link);
4601}
4602
4603/* The serialized state in /run is up-to-date */
4604void link_clean(Link *link) {
4605 assert(link);
4606 assert(link->manager);
4607
1046bf9b 4608 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4609}
4610
c2a65950
YW		 4611int link_save_and_clean(Link *link) {
4612 int r;
4613
4614 r = link_save(link);
4615 if (r < 0)
4616 return r;
4617
4618 link_clean(link);
4619 return 0;
4620}
4621
fe8db0c5 4622static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4623 [LINK_STATE_PENDING] = "pending",
bd08ce56 4624 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 4625 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 4626 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4627 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4628 [LINK_STATE_FAILED] = "failed",
370e9930 4629 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4630};
4631
4632DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
5ecb131d
YW		 4633
4634int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg) {
4635 const char *err_msg = NULL;
4636
4637 (void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg);
ab119e63
YW		 4638 return log_link_full(link, level, err,
4639 "%s: %s%s%s%m",
4640 msg,
4641 strempty(err_msg),
4642 err_msg && !endswith(err_msg, ".") ? "." : "",
4643 err_msg ? " " : "");
5ecb131d 4644}
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