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[thirdparty/systemd.git] / src / network / networkd-link.c
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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"
75156ccb 35#include "networkd-nexthop.h"
518cd6b5 36#include "networkd-sriov.h"
7465dd22 37#include "networkd-radv.h"
bce67bbe 38#include "networkd-routing-policy-rule.h"
8d968fdd 39#include "networkd-wifi.h"
cf1d700d
TG		 40#include "set.h"
41#include "socket-util.h"
bf331d87 42#include "stat-util.h"
15a5e950 43#include "stdio-util.h"
8b43440b 44#include "string-table.h"
51517f9e 45#include "strv.h"
62e021a9 46#include "sysctl-util.h"
34658df2 47#include "tc.h"
e4de7287 48#include "tmpfile-util.h"
299ad32d 49#include "udev-util.h"
cf1d700d 50#include "util.h"
737f1405 51#include "vrf.h"
fc2f9534 52
bdb9f580
YW		 53uint32_t link_get_vrf_table(Link *link) {
54 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
55}
56
57uint32_t link_get_dhcp_route_table(Link *link) {
58 /* When the interface is part of an VRF use the VRFs routing table, unless
59 * another table is explicitly specified. */
60 if (link->network->dhcp_route_table_set)
61 return link->network->dhcp_route_table;
62 return link_get_vrf_table(link);
63}
64
65uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
66 if (link->network->ipv6_accept_ra_route_table_set)
67 return link->network->ipv6_accept_ra_route_table;
68 return link_get_vrf_table(link);
69}
70
f24648a6
YW		 71DUID* link_get_duid(Link *link) {
72 if (link->network->duid.type != _DUID_TYPE_INVALID)
73 return &link->network->duid;
74 else
75 return &link->manager->duid;
76}
77
b9d74c40
LP		 78static bool link_dhcp6_enabled(Link *link) {
79 assert(link);
80
fa709992
LP		 81 if (!socket_ipv6_is_supported())
82 return false;
83
78c958f8
TG		 84 if (link->flags & IFF_LOOPBACK)
85 return false;
86
87 if (!link->network)
88 return false;
89
f2bfcdb9
YW		 90 if (link->network->bond)
91 return false;
92
500b96eb 93 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 94 return false;
95
e0ee46f2 96 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 97}
98
b9d74c40
LP		 99static bool link_dhcp4_enabled(Link *link) {
100 assert(link);
101
78c958f8
TG		 102 if (link->flags & IFF_LOOPBACK)
103 return false;
104
105 if (!link->network)
106 return false;
107
f2bfcdb9
YW		 108 if (link->network->bond)
109 return false;
110
500b96eb 111 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 112 return false;
113
e0ee46f2 114 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 115}
116
b9d74c40
LP		 117static bool link_dhcp4_server_enabled(Link *link) {
118 assert(link);
119
78c958f8
TG		 120 if (link->flags & IFF_LOOPBACK)
121 return false;
122
123 if (!link->network)
124 return false;
125
f2bfcdb9
YW		 126 if (link->network->bond)
127 return false;
128
500b96eb 129 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 130 return false;
131
78c958f8
TG		 132 return link->network->dhcp_server;
133}
134
2d792895 135bool link_ipv4ll_enabled(Link *link, AddressFamily mask) {
b9d74c40 136 assert(link);
910feb78 137 assert((mask & ~(ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) == 0);
b9d74c40 138
78c958f8
TG		 139 if (link->flags & IFF_LOOPBACK)
140 return false;
141
142 if (!link->network)
143 return false;
144
500b96eb 145 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 146 return false;
147
98d20a17 148 if (STRPTR_IN_SET(link->kind,
149 "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
b0486c73 150 "vti6", "nlmon", "xfrm", "bareudp"))
a8f5bba6
JD		 151 return false;
152
f410d463
YW		 153 /* L3 or L3S mode do not support ARP. */
154 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
155 return false;
156
f2bfcdb9
YW		 157 if (link->network->bond)
158 return false;
159
910feb78 160 return link->network->link_local & mask;
8bc17bb3
SS		 161}
162
b9d74c40
LP		 163static bool link_ipv6ll_enabled(Link *link) {
164 assert(link);
165
fa709992
LP		 166 if (!socket_ipv6_is_supported())
167 return false;
168
d0d6a4cd
TG		 169 if (link->flags & IFF_LOOPBACK)
170 return false;
171
172 if (!link->network)
173 return false;
174
500b96eb 175 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 176 return false;
177
178 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon"))
a8f5bba6
JD		 179 return false;
180
f2bfcdb9
YW		 181 if (link->network->bond)
182 return false;
183
e0ee46f2 184 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 185}
186
439689c6
SS		 187static bool link_ipv6_enabled(Link *link) {
188 assert(link);
189
190 if (!socket_ipv6_is_supported())
191 return false;
192
b102cdca 193 if (link->network->bond)
2b00a4e0
TY		 194 return false;
195
500b96eb 196 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 197 return false;
198
4cef7fe3 199 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
adfeee49
YW		 200 if (link_ipv6ll_enabled(link))
201 return true;
202
203 if (network_has_static_ipv6_configurations(link->network))
204 return true;
205
206 return false;
439689c6
SS		 207}
208
7465dd22
PF		 209static bool link_radv_enabled(Link *link) {
210 assert(link);
211
212 if (!link_ipv6ll_enabled(link))
213 return false;
214
55a7c78b 215 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 216}
217
769d324c 218static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 219 assert(link);
220
5a8bcb67
LP		 221 if (link->flags & IFF_LOOPBACK)
222 return false;
223
224 if (!link->network)
225 return false;
226
2d792895 227 if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
765afd5c
LP		 228 return false;
229
e0ee46f2 230 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 231}
232
233static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 234 assert(link);
765afd5c
LP		 235
236 if (!socket_ipv6_is_supported())
237 return false;
238
769d324c
LP		 239 if (link->flags & IFF_LOOPBACK)
240 return false;
241
242 if (!link->network)
243 return false;
244
2d792895 245 if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
765afd5c
LP		 246 return false;
247
e0ee46f2 248 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 249}
250
23d8b221
SS		 251static bool link_proxy_arp_enabled(Link *link) {
252 assert(link);
253
254 if (link->flags & IFF_LOOPBACK)
255 return false;
256
257 if (!link->network)
258 return false;
259
260 if (link->network->proxy_arp < 0)
261 return false;
262
263 return true;
264}
265
b9d74c40
LP		 266static bool link_ipv6_accept_ra_enabled(Link *link) {
267 assert(link);
268
fa709992
LP		 269 if (!socket_ipv6_is_supported())
270 return false;
271
f5a8c43f
TG		 272 if (link->flags & IFF_LOOPBACK)
273 return false;
274
275 if (!link->network)
276 return false;
277
702c979f
SS		 278 if (!link_ipv6ll_enabled(link))
279 return false;
280
f5a8c43f
TG		 281 /* If unset use system default (enabled if local forwarding is disabled.
282 * disabled if local forwarding is enabled).
283 * If set, ignore or enforce RA independent of local forwarding state.
284 */
285 if (link->network->ipv6_accept_ra < 0)
286 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
287 return !link_ipv6_forward_enabled(link);
288 else if (link->network->ipv6_accept_ra > 0)
289 /* accept RA even if ip_forward is enabled */
290 return true;
291 else
292 /* ignore RA */
293 return false;
294}
295
1f0d9695 296static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 297 assert(link);
d68e2e59
LP		 298
299 if (!socket_ipv6_is_supported())
300 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
301
49092e22 302 if (link->flags & IFF_LOOPBACK)
1f0d9695 303 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 304
305 if (!link->network)
1f0d9695 306 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 307
308 return link->network->ipv6_privacy_extensions;
309}
310
57ad7607 311static int link_update_ipv6_sysctl(Link *link) {
482efedc 312 bool enabled;
439689c6
SS		 313 int r;
314
315 if (link->flags & IFF_LOOPBACK)
316 return 0;
317
482efedc
SS		 318 enabled = link_ipv6_enabled(link);
319 if (enabled) {
320 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", false);
321 if (r < 0)
57ad7607
ZJS		 322 return log_link_warning_errno(link, r, "Cannot enable IPv6: %m");
323
324 log_link_info(link, "IPv6 successfully enabled");
482efedc 325 }
439689c6
SS		 326
327 return 0;
328}
329
34bf3c00
YW		 330static bool link_is_enslaved(Link *link) {
331 if (link->flags & IFF_SLAVE)
332 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
333 return true;
334
34bf3c00
YW		 335 if (!link->network)
336 return false;
337
bb262ef0 338 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 339 return true;
340
bb262ef0
YW		 341 /* TODO: add conditions for other netdevs. */
342
34bf3c00
YW		 343 return false;
344}
345
45e11abf
YW		 346static void link_update_master_operstate(Link *link, NetDev *netdev) {
347 Link *master;
348
349 if (!netdev)
350 return;
351
7936917e
YW		 352 if (netdev->ifindex <= 0)
353 return;
354
45e11abf
YW		 355 if (link_get(link->manager, netdev->ifindex, &master) < 0)
356 return;
357
358 link_update_operstate(master, true);
359}
360
361void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 362 LinkOperationalState operstate;
1678fbb3
YW		 363 LinkCarrierState carrier_state;
364 LinkAddressState address_state;
35c5a9ca 365 _cleanup_strv_free_ char **p = NULL;
1678fbb3 366 uint8_t scope = RT_SCOPE_NOWHERE;
35c5a9ca 367 bool changed = false;
1678fbb3 368 Address *address;
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
90e74a66 387 SET_FOREACH(slave, link->slaves) {
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
90e74a66 395 SET_FOREACH(address, link->addresses) {
1678fbb3
YW		 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 403 /* for operstate we also take foreign addresses into account */
90e74a66 404 SET_FOREACH(address, link->addresses_foreign) {
1678fbb3
YW		 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 722 link->ndisc_routes = set_free(link->ndisc_routes);
adda1ed9 723
8eec0b9d
YW		 724 link->nexthops = set_free(link->nexthops);
725 link->nexthops_foreign = set_free(link->nexthops_foreign);
c16c7808 726
8eec0b9d
YW		 727 link->neighbors = set_free(link->neighbors);
728 link->neighbors_foreign = set_free(link->neighbors_foreign);
d1bdafd2 729
8eec0b9d
YW		 730 link->addresses = set_free(link->addresses);
731 link->addresses_foreign = set_free(link->addresses_foreign);
e5526518 732 link->static_addresses = set_free(link->static_addresses);
1633c457
YW		 733 link->dhcp6_addresses = set_free(link->dhcp6_addresses);
734 link->dhcp6_addresses_old = set_free(link->dhcp6_addresses_old);
735 link->dhcp6_pd_addresses = set_free(link->dhcp6_pd_addresses);
736 link->dhcp6_pd_addresses_old = set_free(link->dhcp6_pd_addresses_old);
69203fba 737 link->ndisc_addresses = set_free(link->ndisc_addresses);
adda1ed9 738
11bf3cce
LP		 739 while ((address = link->pool_addresses)) {
740 LIST_REMOVE(addresses, link->pool_addresses, address);
741 address_free(address);
742 }
743
7272b25e 744 link_lldp_emit_stop(link);
1a6bb31f 745 link_free_engines(link);
68a8723c 746 free(link->lease_file);
49699bac
SS		 747 free(link->lldp_file);
748
c166a070 749 free(link->ifname);
572b21d9 750 strv_free(link->alternative_names);
ceac4078 751 free(link->kind);
8d968fdd 752 free(link->ssid);
c643bda5 753 free(link->driver);
6cad256d 754
db2f8a2e 755 (void) unlink(link->state_file);
fe8db0c5 756 free(link->state_file);
c166a070 757
51517f9e 758 sd_device_unref(link->sd_device);
b5db00e5 759
0d4ad91d 760 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 761 hashmap_free(link->bound_by_links);
762
5f707e12 763 set_free_with_destructor(link->slaves, link_unref);
033295c1 764
c9c908a6
YW		 765 network_unref(link->network);
766
8301aa0b 767 return mfree(link);
14b746f7
TG		 768}
769
8301aa0b 770DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 771
11a7f229
TG		 772int link_get(Manager *m, int ifindex, Link **ret) {
773 Link *link;
11a7f229
TG		 774
775 assert(m);
e856ed00 776 assert(ifindex > 0);
11a7f229
TG		 777 assert(ret);
778
ae06ab10 779 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 780 if (!link)
781 return -ENODEV;
782
783 *ret = link;
784
785 return 0;
786}
787
af9ba57a 788void link_set_state(Link *link, LinkState state) {
e331e246
TG		 789 assert(link);
790
791 if (link->state == state)
792 return;
793
0beb9542
YW		 794 log_link_debug(link, "State changed: %s -> %s",
795 link_state_to_string(link->state),
796 link_state_to_string(state));
797
e331e246
TG		 798 link->state = state;
799
800 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 801}
802
57bd6899
TG		 803static void link_enter_unmanaged(Link *link) {
804 assert(link);
805
e331e246 806 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 807
84de38c5 808 link_dirty(link);
57bd6899
TG		 809}
810
95355a28 811int link_stop_clients(Link *link, bool may_keep_dhcp) {
111bb8f9 812 int r = 0, k;
051e77ca 813 Address *ad;
111bb8f9
TG		 814
815 assert(link);
816 assert(link->manager);
817 assert(link->manager->event);
818
80060352
ZJS		 819 bool keep_dhcp = may_keep_dhcp &&
820 link->network &&
821 (link->manager->restarting ||
822 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
823
824 if (link->dhcp_client && !keep_dhcp) {
111bb8f9 825 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 826 if (k < 0)
36c7d709 827 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 828 }
829
ba179154 830 if (link->ipv4ll) {
111bb8f9 831 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 832 if (k < 0)
36c7d709 833 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 834 }
835
051e77ca
SS		 836 if (link->network)
837 LIST_FOREACH(addresses, ad, link->network->static_addresses)
838 if (ad->acd && sd_ipv4acd_is_running(ad->acd) == 0) {
839 k = sd_ipv4acd_stop(ad->acd);
840 if (k < 0)
841 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
842 }
843
f5a8c43f
TG		 844 if (link->dhcp6_client) {
845 k = sd_dhcp6_client_stop(link->dhcp6_client);
846 if (k < 0)
36c7d709 847 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 848 }
4138fb2c 849
1633c457
YW		 850 if (link_dhcp6_pd_is_enabled(link)) {
851 k = dhcp6_pd_remove(link);
852 if (k < 0)
853 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
854 }
855
1e7a0e21
LP		 856 if (link->ndisc) {
857 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 858 if (k < 0)
36c7d709 859 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 860 }
861
7465dd22 862 if (link->radv) {
290696e5 863 k = sd_radv_stop(link->radv);
7465dd22
PF		 864 if (k < 0)
865 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
866 }
867
7272b25e 868 link_lldp_emit_stop(link);
111bb8f9
TG		 869 return r;
870}
871
b22d8a00 872void link_enter_failed(Link *link) {
ef1ba606 873 assert(link);
f882c247 874
370e9930 875 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 876 return;
877
6a7a4e4d 878 log_link_warning(link, "Failed");
449f7554 879
e331e246 880 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 881
95355a28 882 link_stop_clients(link, false);
111bb8f9 883
84de38c5 884 link_dirty(link);
f882c247
TG		 885}
886
7033af49
YW		 887static int link_join_netdevs_after_configured(Link *link) {
888 NetDev *netdev;
7033af49
YW		 889 int r;
890
90e74a66 891 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7033af49
YW		 892 if (netdev->ifindex > 0)
893 /* Assume already enslaved. */
894 continue;
895
896 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
897 continue;
898
899 log_struct(LOG_DEBUG,
900 LOG_LINK_INTERFACE(link),
901 LOG_NETDEV_INTERFACE(netdev),
902 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
903
904 r = netdev_join(netdev, link, NULL);
905 if (r < 0)
906 return log_struct_errno(LOG_WARNING, r,
907 LOG_LINK_INTERFACE(link),
908 LOG_NETDEV_INTERFACE(netdev),
909 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
910 }
911
912 return 0;
913}
914
e3a7b048 915static void link_enter_configured(Link *link) {
dd43110f
TG		 916 assert(link);
917 assert(link->network);
e3a7b048 918
289e6774 919 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 920 return;
dd43110f 921
e331e246 922 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 923
7033af49
YW		 924 (void) link_join_netdevs_after_configured(link);
925
84de38c5 926 link_dirty(link);
dd43110f
TG		 927}
928
302a796f 929static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 930 int r;
931
1046bf9b 932 assert(link);
7715629e 933 assert(link->route_messages > 0);
289e6774
WKI		 934 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
935 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 936
7715629e 937 link->route_messages--;
f882c247 938
77a008c0 939 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 940 return 1;
941
1c4baffc 942 r = sd_netlink_message_get_errno(m);
4ff296b0 943 if (r < 0 && r != -EEXIST) {
5ecb131d 944 log_link_message_warning_errno(link, m, r, "Could not set route");
4ff296b0
YW		 945 link_enter_failed(link);
946 return 1;
947 }
f882c247 948
7715629e 949 if (link->route_messages == 0) {
6a7a4e4d 950 log_link_debug(link, "Routes set");
7715629e 951 link->static_routes_configured = true;
c133770a 952 link_set_nexthop(link);
dd3efc09 953 }
f882c247
TG		 954
955 return 1;
956}
957
b5799eeb 958int link_request_set_routes(Link *link) {
bf61b05a
LP		 959 enum {
960 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
961 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
962 _PHASE_MAX
963 } phase;
a6cc569e 964 Route *rt;
f882c247
TG		 965 int r;
966
967 assert(link);
968 assert(link->network);
289e6774 969 assert(link->state != _LINK_STATE_INVALID);
f882c247 970
2428613f 971 link->static_routes_configured = false;
27c34f73 972
e5526518
YW		 973 if (!link->addresses_ready)
974 return 0;
975
4e2ef9d9
YW		 976 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
977 /* During configuring addresses, the link lost its carrier. As networkd is dropping
978 * the addresses now, let's not configure the routes either. */
979 return 0;
980
c0ec4746 981 r = link_set_routing_policy_rules(link);
f3ef324d
YW		 982 if (r < 0)
983 return r;
f882c247 984
bf61b05a
LP		 985 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
986 for (phase = 0; phase < _PHASE_MAX; phase++)
987 LIST_FOREACH(routes, rt, link->network->static_routes) {
1985c54f
YW		 988 if (rt->gateway_from_dhcp)
989 continue;
0d34228f 990
6ff5cc6b 991 if ((in_addr_is_null(rt->family, &rt->gw) && ordered_set_isempty(rt->multipath_routes)) != (phase == PHASE_NON_GATEWAY))
bf61b05a 992 continue;
a6cc569e 993
80b0e860 994 r = route_configure(rt, link, route_handler, NULL);
4ff296b0
YW		 995 if (r < 0)
996 return log_link_warning_errno(link, r, "Could not set routes: %m");
c4423317
YW		 997 if (r > 0)
998 link->route_messages++;
0d34228f 999 }
f5be5601 1000
7715629e
ST		 1001 if (link->route_messages == 0) {
1002 link->static_routes_configured = true;
c133770a 1003 link_set_nexthop(link);
b425c3ae 1004 } else {
6a7a4e4d 1005 log_link_debug(link, "Setting routes");
b425c3ae
YW		 1006 link_set_state(link, LINK_STATE_CONFIGURING);
1007 }
f882c247
TG		 1008
1009 return 0;
1010}
1011
6accfd31
DA		 1012void link_check_ready(Link *link) {
1013 Address *a;
6accfd31
DA		 1014
1015 assert(link);
1016
5f58af25
YW		 1017 if (link->state == LINK_STATE_CONFIGURED)
1018 return;
1019
1020 if (link->state != LINK_STATE_CONFIGURING) {
1021 log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31 1022 return;
39373cb9 1023 }
6accfd31
DA		 1024
1025 if (!link->network)
1026 return;
1027
39373cb9
YW		 1028 if (!link->addresses_configured) {
1029 log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 1030 return;
39373cb9 1031 }
6accfd31 1032
39373cb9
YW		 1033 if (!link->neighbors_configured) {
1034 log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
6accfd31 1035 return;
39373cb9 1036 }
6accfd31 1037
90e74a66 1038 SET_FOREACH(a, link->addresses)
39373cb9
YW		 1039 if (!address_is_ready(a)) {
1040 _cleanup_free_ char *str = NULL;
1041
1042 (void) in_addr_to_string(a->family, &a->in_addr, &str);
1043 log_link_debug(link, "%s(): an address %s/%d is not ready.", __func__, strnull(str), a->prefixlen);
6aa5773b 1044 return;
39373cb9 1045 }
6aa5773b 1046
39373cb9
YW		 1047 if (!link->static_routes_configured) {
1048 log_link_debug(link, "%s(): static routes are not configured.", __func__);
6accfd31 1049 return;
39373cb9 1050 }
6accfd31 1051
39373cb9
YW		 1052 if (!link->static_nexthops_configured) {
1053 log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 1054 return;
39373cb9 1055 }
c16c7808 1056
39373cb9
YW		 1057 if (!link->routing_policy_rules_configured) {
1058 log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 1059 return;
39373cb9 1060 }
6accfd31 1061
39373cb9
YW		 1062 if (!link->tc_configured) {
1063 log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
4ecdcb07 1064 return;
39373cb9 1065 }
4ecdcb07 1066
39373cb9
YW		 1067 if (!link->sr_iov_configured) {
1068 log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 1069 return;
39373cb9 1070 }
518cd6b5 1071
1f241589
YW		 1072 if (!link->bridge_mdb_configured) {
1073 log_link_debug(link, "%s(): Bridge MDB is not configured.", __func__);
1074 return;
1075 }
1076
463797c1 1077 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
50550722
YW		 1078 bool has_ndisc_address = false;
1079 NDiscAddress *n;
6accfd31 1080
1c09d84e 1081 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !link->ipv4ll_address_configured) {
39373cb9 1082 log_link_debug(link, "%s(): IPv4LL is not configured.", __func__);
463797c1 1083 return;
39373cb9 1084 }
6accfd31 1085
463797c1 1086 if (link_ipv6ll_enabled(link) &&
39373cb9
YW		 1087 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
1088 log_link_debug(link, "%s(): IPv6LL is not configured.", __func__);
463797c1 1089 return;
39373cb9 1090 }
6accfd31 1091
90e74a66 1092 SET_FOREACH(n, link->ndisc_addresses)
50550722
YW		 1093 if (!n->marked) {
1094 has_ndisc_address = true;
1095 break;
1096 }
1097
15797d6a 1098 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
50550722 1099 !link->dhcp_address && set_isempty(link->dhcp6_addresses) && !has_ndisc_address &&
15797d6a
YW		 1100 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
1101 log_link_debug(link, "%s(): DHCP4 or DHCP6 is enabled but no dynamic address is assigned yet.", __func__);
659ad3a0
YW		 1102 return;
1103 }
1104
1633c457 1105 if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_dhcp6_pd_is_enabled(link) || link_ipv6_accept_ra_enabled(link)) {
39373cb9
YW		 1106 if (!link->dhcp4_configured &&
1107 !(link->dhcp6_address_configured && link->dhcp6_route_configured) &&
1108 !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) &&
d98c546d 1109 !(link->ndisc_addresses_configured && link->ndisc_routes_configured) &&
1c09d84e 1110 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
39373cb9
YW		 1111 /* When DHCP or RA is enabled, at least one protocol must provide an address, or
1112 * an IPv4ll fallback address must be configured. */
1113 log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
1114 return;
1115 }
1116
d98c546d 1117 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		 1118 __func__,
1119 yes_no(link->dhcp4_configured),
1120 yes_no(link->dhcp6_address_configured),
1121 yes_no(link->dhcp6_route_configured),
1122 yes_no(link->dhcp6_pd_address_configured),
1123 yes_no(link->dhcp6_pd_route_configured),
d98c546d
YW		 1124 yes_no(link->ndisc_addresses_configured),
1125 yes_no(link->ndisc_routes_configured));
39373cb9 1126 }
463797c1 1127 }
6accfd31 1128
5f58af25 1129 link_enter_configured(link);
6accfd31
DA		 1130
1131 return;
1132}
1133
e4a71bf3
WKI		 1134static int link_request_set_neighbors(Link *link) {
1135 Neighbor *neighbor;
1136 int r;
1137
1138 assert(link);
1139 assert(link->network);
1140 assert(link->state != _LINK_STATE_INVALID);
1141
2428613f 1142 link->neighbors_configured = false;
e4a71bf3
WKI		 1143
1144 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
1145 r = neighbor_configure(neighbor, link, NULL);
4ff296b0
YW		 1146 if (r < 0)
1147 return log_link_warning_errno(link, r, "Could not set neighbor: %m");
e4a71bf3
WKI		 1148 }
1149
1150 if (link->neighbor_messages == 0) {
1151 link->neighbors_configured = true;
1152 link_check_ready(link);
b425c3ae 1153 } else {
e4a71bf3 1154 log_link_debug(link, "Setting neighbors");
b425c3ae
YW		 1155 link_set_state(link, LINK_STATE_CONFIGURING);
1156 }
e4a71bf3
WKI		 1157
1158 return 0;
1159}
1160
e5526518
YW		 1161static int link_set_bridge_fdb(Link *link) {
1162 FdbEntry *fdb_entry;
1163 int r;
1164
1165 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1166 r = fdb_entry_configure(link, fdb_entry);
1167 if (r < 0)
1168 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
1169 }
1170
1171 return 0;
1172}
1173
1174static int static_address_ready_callback(Address *address) {
1175 Address *a;
e5526518
YW		 1176 Link *link;
1177
1178 assert(address);
1179 assert(address->link);
1180
1181 link = address->link;
1182
1183 if (!link->addresses_configured)
1184 return 0;
1185
90e74a66 1186 SET_FOREACH(a, link->static_addresses)
e5526518
YW		 1187 if (!address_is_ready(a)) {
1188 _cleanup_free_ char *str = NULL;
1189
1190 (void) in_addr_to_string(a->family, &a->in_addr, &str);
1191 log_link_debug(link, "an address %s/%u is not ready", strnull(str), a->prefixlen);
1192 return 0;
1193 }
1194
1195 /* This should not be called again */
90e74a66 1196 SET_FOREACH(a, link->static_addresses)
e5526518
YW		 1197 a->callback = NULL;
1198
1199 link->addresses_ready = true;
1200
1201 return link_request_set_routes(link);
1202}
1203
3650173f 1204static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1205 int r;
1206
4958aee4 1207 assert(rtnl);
f5be5601
TG		 1208 assert(m);
1209 assert(link);
1210 assert(link->ifname);
7715629e 1211 assert(link->address_messages > 0);
289e6774 1212 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1213 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1214
7715629e 1215 link->address_messages--;
f882c247 1216
5da8149f 1217 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1218 return 1;
1219
1c4baffc 1220 r = sd_netlink_message_get_errno(m);
4ff296b0 1221 if (r < 0 && r != -EEXIST) {
5ecb131d 1222 log_link_message_warning_errno(link, m, r, "Could not set address");
4ff296b0
YW		 1223 link_enter_failed(link);
1224 return 1;
1225 } else if (r >= 0)
1226 (void) manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1227
7715629e 1228 if (link->address_messages == 0) {
e5526518
YW		 1229 Address *a;
1230
6a7a4e4d 1231 log_link_debug(link, "Addresses set");
c42ff3a1 1232 link->addresses_configured = true;
e5526518
YW		 1233
1234 /* When all static addresses are already ready, then static_address_ready_callback()
1235 * will not be called automatically. So, call it here. */
1236 a = set_first(link->static_addresses);
1237 if (!a) {
1238 log_link_warning(link, "No static address is stored.");
1239 link_enter_failed(link);
1240 return 1;
1241 }
1242 if (!a->callback) {
1243 log_link_warning(link, "Address ready callback is not set.");
1244 link_enter_failed(link);
1245 return 1;
1246 }
1247 r = a->callback(a);
1248 if (r < 0)
1249 link_enter_failed(link);
dd3efc09 1250 }
f882c247
TG		 1251
1252 return 1;
1253}
1254
e5526518
YW		 1255static int static_address_configure(Address *address, Link *link, bool update) {
1256 Address *ret;
197e2809 1257 int r;
f6bb7ac5 1258
e5526518
YW		 1259 assert(address);
1260 assert(link);
1261
1262 r = address_configure(address, link, address_handler, update, &ret);
1263 if (r < 0)
1264 return log_link_warning_errno(link, r, "Could not configure static address: %m");
1265
1266 link->address_messages++;
1267
1268 r = set_ensure_put(&link->static_addresses, &address_hash_ops, ret);
1269 if (r < 0)
1270 return log_link_warning_errno(link, r, "Failed to store static address: %m");
1271
1272 ret->callback = static_address_ready_callback;
f6bb7ac5 1273
197e2809 1274 return 0;
f6bb7ac5
TJ		 1275}
1276
289e6774 1277static int link_request_set_addresses(Link *link) {
95b74ef6 1278 AddressLabel *label;
a6cc569e 1279 Address *ad;
bd6379ec 1280 Prefix *p;
f882c247
TG		 1281 int r;
1282
1283 assert(link);
1284 assert(link->network);
f5be5601 1285 assert(link->state != _LINK_STATE_INVALID);
f882c247 1286
9b966cee
YW		 1287 if (link->address_remove_messages != 0) {
1288 log_link_debug(link, "Removing old addresses, new addresses will be configured later.");
1289 link->request_static_addresses = true;
1290 return 0;
1291 }
1292
2428613f 1293 /* Reset all *_configured flags we are configuring. */
9b966cee 1294 link->request_static_addresses = false;
2428613f 1295 link->addresses_configured = false;
6aa5773b 1296 link->addresses_ready = false;
2428613f
YW		 1297 link->neighbors_configured = false;
1298 link->static_routes_configured = false;
c16c7808 1299 link->static_nexthops_configured = false;
2428613f
YW		 1300 link->routing_policy_rules_configured = false;
1301
f6bb7ac5
TJ		 1302 r = link_set_bridge_fdb(link);
1303 if (r < 0)
1304 return r;
1305
1f241589
YW		 1306 r = link_set_bridge_mdb(link);
1307 if (r < 0)
1308 return r;
1309
f3ef324d
YW		 1310 r = link_request_set_neighbors(link);
1311 if (r < 0)
1312 return r;
e4a71bf3 1313
3d3d4255 1314 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1315 bool update;
1316
6f5d73ab
YW		 1317 if (ad->family == AF_INET6 && !in_addr_is_null(ad->family, &ad->in_addr_peer))
1318 update = address_get(link, ad->family, &ad->in_addr_peer, ad->prefixlen, NULL) > 0;
1319 else
1320 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
a47a6dae 1321
e5526518 1322 r = static_address_configure(ad, link, update);
4ff296b0 1323 if (r < 0)
e5526518 1324 return r;
95b74ef6
SS		 1325 }
1326
61c0ef4f 1327 if (link->network->router_prefix_delegation & RADV_PREFIX_DELEGATION_STATIC)
bd6379ec
SS		 1328 LIST_FOREACH(prefixes, p, link->network->static_prefixes) {
1329 _cleanup_(address_freep) Address *address = NULL;
1330
1331 if (!p->assign)
1332 continue;
1333
1334 r = address_new(&address);
1335 if (r < 0)
e5526518 1336 return log_oom();
bd6379ec
SS		 1337
1338 r = sd_radv_prefix_get_prefix(p->radv_prefix, &address->in_addr.in6, &address->prefixlen);
1339 if (r < 0)
e5526518 1340 return log_link_warning_errno(link, r, "Could not get RA prefix: %m");
bd6379ec
SS		 1341
1342 r = generate_ipv6_eui_64_address(link, &address->in_addr.in6);
1343 if (r < 0)
e5526518 1344 return log_link_warning_errno(link, r, "Could not generate EUI64 address: %m");
bd6379ec
SS		 1345
1346 address->family = AF_INET6;
e5526518 1347 r = static_address_configure(address, link, true);
bd6379ec 1348 if (r < 0)
e5526518 1349 return r;
bd6379ec
SS		 1350 }
1351
95b74ef6 1352 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1353 r = address_label_configure(label, link, NULL, false);
4ff296b0
YW		 1354 if (r < 0)
1355 return log_link_warning_errno(link, r, "Could not set address label: %m");
f5be5601 1356
7715629e 1357 link->address_label_messages++;
f882c247
TG		 1358 }
1359
e5526518 1360 /* now that we can figure out a default address for the dhcp server, start it */
708c425d 1361 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
8fcf1d61 1362 r = dhcp4_server_configure(link);
4ff296b0 1363 if (r < 0)
d4cdbea5 1364 return r;
6a7a4e4d 1365 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1366 }
1367
c42ff3a1
WKI		 1368 if (link->address_messages == 0) {
1369 link->addresses_configured = true;
e5526518
YW		 1370 link->addresses_ready = true;
1371 r = link_request_set_routes(link);
1372 if (r < 0)
1373 return r;
b425c3ae 1374 } else {
6a7a4e4d 1375 log_link_debug(link, "Setting addresses");
b425c3ae
YW		 1376 link_set_state(link, LINK_STATE_CONFIGURING);
1377 }
431ca2ce 1378
f882c247
TG		 1379 return 0;
1380}
1381
13b498f9 1382static int link_set_bridge_vlan(Link *link) {
86e2be7b 1383 int r;
13b498f9
TJ		 1384
1385 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1386 if (r < 0)
1387 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1388
1389 return r;
1390}
1391
a60a720c 1392static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1393 int r;
1394
1395 if (!link_proxy_arp_enabled(link))
1396 return 0;
1397
62e021a9 1398 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1399 if (r < 0)
1400 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1401
1402 return 0;
1403}
1404
3a390124 1405static int link_configure_continue(Link *link);
55dc8c4a 1406
302a796f 1407static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1408 int r;
1409
1410 assert(m);
1411 assert(link);
1412 assert(link->ifname);
1413
55dc8c4a
YW		 1414 link->setting_mtu = false;
1415
5da8149f 1416 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1417 return 1;
1418
1c4baffc 1419 r = sd_netlink_message_get_errno(m);
4ff296b0 1420 if (r < 0)
5ecb131d 1421 log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring");
4ff296b0
YW		 1422 else
1423 log_link_debug(link, "Setting MTU done.");
55dc8c4a 1424
4ff296b0 1425 if (link->state == LINK_STATE_INITIALIZED) {
3a390124 1426 r = link_configure_continue(link);
4ff296b0
YW		 1427 if (r < 0)
1428 link_enter_failed(link);
1429 }
4f882b2a
TG		 1430
1431 return 1;
1432}
1433
933c70a0 1434int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1435 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1436 int r;
1437
1438 assert(link);
1439 assert(link->manager);
1440 assert(link->manager->rtnl);
1441
40288ece
YW		 1442 if (mtu == 0 || link->setting_mtu)
1443 return 0;
1444
933c70a0 1445 if (link->mtu == mtu)
ee493106
YW		 1446 return 0;
1447
6a7a4e4d 1448 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1449
6a7a4e4d
LP		 1450 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1451 if (r < 0)
1452 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1453
44b598a1 1454 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1455 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1456 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1457
1458 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
d236718c 1459 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes");
44b598a1 1460
72c2500b 1461 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1462 }
1463
1c4baffc 1464 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1465 if (r < 0)
1466 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1467
302a796f
YW		 1468 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1469 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1470 if (r < 0)
1471 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1472
ae941762 1473 link_ref(link);
1046bf9b 1474 link->setting_mtu = true;
b226d99b 1475
4f882b2a
TG		 1476 return 0;
1477}
1478
f6fcc1c2
YW		 1479static bool link_reduces_vlan_mtu(Link *link) {
1480 /* See netif_reduces_vlan_mtu() in kernel. */
1481 return streq_ptr(link->kind, "macsec");
1482}
1483
1484static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1485 uint32_t mtu = 0;
1486 NetDev *dev;
f6fcc1c2 1487
90e74a66 1488 HASHMAP_FOREACH(dev, link->network->stacked_netdevs)
f6fcc1c2
YW		 1489 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1490 /* See vlan_dev_change_mtu() in kernel. */
1491 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1492
1493 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1494 /* See macvlan_change_mtu() in kernel. */
1495 mtu = dev->mtu;
1496
1497 return mtu;
1498}
1499
1500static int link_configure_mtu(Link *link) {
1501 uint32_t mtu;
1502
1503 assert(link);
1504 assert(link->network);
1505
1506 if (link->network->mtu > 0)
1507 return link_set_mtu(link, link->network->mtu);
1508
1509 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1510 if (link->mtu >= mtu)
1511 return 0;
1512
1513 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1514 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1515 link->mtu, mtu);
1516
1517 return link_set_mtu(link, mtu);
1518}
1519
302a796f 1520static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1521 int r;
1522
1523 assert(m);
1524 assert(link);
1525 assert(link->ifname);
1526
1527 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1528 return 1;
1529
1530 r = sd_netlink_message_get_errno(m);
1531 if (r < 0)
5ecb131d 1532 log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring");
99d2baa2
SS		 1533
1534 return 1;
1535}
1536
1537static int link_set_flags(Link *link) {
1538 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1539 unsigned ifi_change = 0;
1540 unsigned ifi_flags = 0;
1541 int r;
1542
1543 assert(link);
1544 assert(link->manager);
1545 assert(link->manager->rtnl);
1546
1547 if (link->flags & IFF_LOOPBACK)
1548 return 0;
1549
1550 if (!link->network)
1551 return 0;
1552
866e6b7a 1553 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1554 return 0;
1555
1556 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1557 if (r < 0)
1558 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1559
1560 if (link->network->arp >= 0) {
1561 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1562 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1563 }
1564
1565 if (link->network->multicast >= 0) {
1566 ifi_change |= IFF_MULTICAST;
1567 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1568 }
1569
866e6b7a
SS		 1570 if (link->network->allmulticast >= 0) {
1571 ifi_change |= IFF_ALLMULTI;
1572 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1573 }
1574
99d2baa2
SS		 1575 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1576 if (r < 0)
1577 return log_link_error_errno(link, r, "Could not set link flags: %m");
1578
302a796f
YW		 1579 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1580 link_netlink_destroy_callback, link);
99d2baa2
SS		 1581 if (r < 0)
1582 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1583
1584 link_ref(link);
1585
1586 return 0;
1587}
1588
e7ab854c
TG		 1589static int link_acquire_ipv6_conf(Link *link) {
1590 int r;
1591
1592 assert(link);
1593
e7ab854c 1594 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1595 assert(link->ndisc);
e7ab854c
TG		 1596
1597 log_link_debug(link, "Discovering IPv6 routers");
1598
1e7a0e21 1599 r = sd_ndisc_start(link->ndisc);
63348d13 1600 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1601 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1602 }
1603
7465dd22
PF		 1604 if (link_radv_enabled(link)) {
1605 assert(link->radv);
1606 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1607
1608 log_link_debug(link, "Starting IPv6 Router Advertisements");
1609
fd3ef936
YW		 1610 r = radv_emit_dns(link);
1611 if (r < 0)
1612 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
1613
7465dd22
PF		 1614 r = sd_radv_start(link->radv);
1615 if (r < 0 && r != -EBUSY)
1616 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1617 }
1618
838d39af
SS		 1619 if (link_dhcp6_enabled(link) && IN_SET(link->network->dhcp6_without_ra,
1620 DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST,
1621 DHCP6_CLIENT_START_MODE_SOLICIT)) {
cd305af1
SS		 1622 assert(link->dhcp6_client);
1623 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1624
838d39af 1625 r = dhcp6_request_address(link, link->network->dhcp6_without_ra == DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST);
cd305af1 1626 if (r < 0 && r != -EBUSY)
1633c457 1627 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
cd305af1
SS		 1628 else
1629 log_link_debug(link, "Acquiring DHCPv6 lease");
1630 }
1631
1633c457
YW		 1632 r = dhcp6_request_prefix_delegation(link);
1633 if (r < 0)
1634 return log_link_warning_errno(link, r, "Failed to request DHCPv6 prefix delegation: %m");
10752343 1635
e7ab854c
TG		 1636 return 0;
1637}
1638
6fc25497 1639static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1640 int r;
1641
1642 assert(link);
ff254138
TG		 1643 assert(link->manager);
1644 assert(link->manager->event);
1645
910feb78 1646 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1647 assert(link->ipv4ll);
ff254138 1648
6a7a4e4d 1649 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1650
1651 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1652 if (r < 0)
1653 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1654 }
1655
78c958f8 1656 if (link_dhcp4_enabled(link)) {
eb34d4af 1657 assert(link->dhcp_client);
ff254138 1658
6a7a4e4d 1659 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1660
5c1d3fc9 1661 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1662 if (r < 0)
1663 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1664 }
ff254138 1665
6fc25497
SS		 1666 return 0;
1667}
1668
1669static int link_acquire_conf(Link *link) {
1670 int r;
1671
1672 assert(link);
1673
1674 r = link_acquire_ipv4_conf(link);
1675 if (r < 0)
1676 return r;
1677
3f7cc080 1678 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1679 r = link_acquire_ipv6_conf(link);
1680 if (r < 0)
1681 return r;
1682 }
1683
7272b25e
LP		 1684 if (link_lldp_emit_enabled(link)) {
1685 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1686 if (r < 0)
1687 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1688 }
1689
ff254138
TG		 1690 return 0;
1691}
1692
a61bb41c 1693bool link_has_carrier(Link *link) {
deb2e523
TG		 1694 /* see Documentation/networking/operstates.txt in the kernel sources */
1695
a61bb41c 1696 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1697 return true;
1698
a61bb41c 1699 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1700 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1701 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1702 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1703 return true;
1704
1705 return false;
1706}
1707
0e2fdb83
SS		 1708static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1709 int r;
1710
1711 assert(link);
1712
9524014e
DS		 1713 link->setting_genmode = false;
1714
0e2fdb83
SS		 1715 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1716 return 1;
1717
1718 r = sd_netlink_message_get_errno(m);
1719 if (r < 0)
5ecb131d 1720 log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring");
9524014e
DS		 1721 else
1722 log_link_debug(link, "Setting address genmode done.");
1723
1724 if (link->state == LINK_STATE_INITIALIZED) {
1725 r = link_configure_continue(link);
1726 if (r < 0)
1727 link_enter_failed(link);
1728 }
0e2fdb83
SS		 1729
1730 return 1;
1731}
1732
1733static int link_configure_addrgen_mode(Link *link) {
1734 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1735 uint8_t ipv6ll_mode;
1736 int r;
1737
1738 assert(link);
1739 assert(link->network);
1740 assert(link->manager);
1741 assert(link->manager->rtnl);
1742
9524014e 1743 if (!socket_ipv6_is_supported() || link->setting_genmode)
9f6e82e6
YW		 1744 return 0;
1745
0e2fdb83
SS		 1746 log_link_debug(link, "Setting address genmode for link");
1747
1748 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1749 if (r < 0)
1750 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1751
1752 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1753 if (r < 0)
1754 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1755
1756 r = sd_netlink_message_open_container(req, AF_INET6);
1757 if (r < 0)
1758 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1759
1760 if (!link_ipv6ll_enabled(link))
1761 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
6f6296b9 1762 else if (link->network->ipv6ll_address_gen_mode < 0) {
a6f1848a
SS		 1763 r = sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL);
1764 if (r < 0) {
1765 /* The file may not exist. And even if it exists, when stable_secret is unset,
1766 * reading the file fails with EIO. */
1767 log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret: %m");
1768
1769 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1770 } else
1771 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1772 } else
6f6296b9 1773 ipv6ll_mode = link->network->ipv6ll_address_gen_mode;
0e2fdb83
SS		 1774
1775 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1776 if (r < 0)
1777 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1778
1779 r = sd_netlink_message_close_container(req);
1780 if (r < 0)
1781 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1782
1783 r = sd_netlink_message_close_container(req);
1784 if (r < 0)
1785 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1786
1787 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1788 link_netlink_destroy_callback, link);
1789 if (r < 0)
1790 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1791
1792 link_ref(link);
9524014e 1793 link->setting_genmode = true;
0e2fdb83
SS		 1794
1795 return 0;
1796}
1797
302a796f 1798static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1799 int r;
1800
1746cf2a
TG		 1801 assert(link);
1802
5da8149f 1803 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1804 return 1;
1805
1c4baffc 1806 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1807 if (r < 0)
26d6b214 1808 /* we warn but don't fail the link, as it may be brought up later */
5ecb131d 1809 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
45ad2c13 1810
f882c247
TG		 1811 return 1;
1812}
1813
1cc84f3b 1814static int link_up(Link *link) {
4afd3348 1815 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1816 int r;
1817
f882c247 1818 assert(link);
c106cc36 1819 assert(link->network);
f882c247
TG		 1820 assert(link->manager);
1821 assert(link->manager->rtnl);
1822
6a7a4e4d 1823 log_link_debug(link, "Bringing link up");
449f7554 1824
6a7a4e4d
LP		 1825 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1826 if (r < 0)
1827 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1828
2b2d8603 1829 /* set it free if not enslaved with networkd */
6cb955c6 1830 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1831 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1832 if (r < 0)
1833 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1834 }
1835
5d4795f3 1836 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1837 if (r < 0)
1838 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1839
c106cc36 1840 if (link->network->mac) {
1c4baffc 1841 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1842 if (r < 0)
1843 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1844 }
1845
302a796f
YW		 1846 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1847 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1848 if (r < 0)
1849 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1850
b226d99b
TG		 1851 link_ref(link);
1852
f882c247
TG		 1853 return 0;
1854}
1855
302a796f 1856static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1857 int r;
1858
1859 assert(link);
1860
1861 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1862 return 1;
1863
1c4baffc 1864 r = sd_netlink_message_get_errno(m);
0d4ad91d 1865 if (r < 0)
5ecb131d 1866 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
0d4ad91d
AR		 1867
1868 return 1;
1869}
1870
8e54db83 1871int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1872 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1873 int r;
1874
1875 assert(link);
1876 assert(link->manager);
1877 assert(link->manager->rtnl);
1878
6a7a4e4d 1879 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1880
1881 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1882 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1883 if (r < 0)
1884 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1885
1886 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1887 if (r < 0)
1888 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1889
8e54db83
YW		 1890 r = netlink_call_async(link->manager->rtnl, NULL, req,
1891 callback ?: link_down_handler,
302a796f 1892 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1893 if (r < 0)
1894 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1895
1896 link_ref(link);
1897
1898 return 0;
1899}
1900
89fe6535
SS		 1901static int link_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1902 int r;
1903
1904 assert(link);
1905
1906 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1907 return 1;
1908
1909 r = sd_netlink_message_get_errno(m);
1910 if (r < 0)
1911 log_link_message_warning_errno(link, m, r, "Could not set group for the interface");
1912
1913 return 1;
1914}
1915
1916static int link_set_group(Link *link) {
1917 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1918 int r;
1919
1920 assert(link);
1921 assert(link->network);
1922 assert(link->manager);
1923 assert(link->manager->rtnl);
1924
1925 if (link->network->group <= 0)
1926 return 0;
1927
1928 log_link_debug(link, "Setting group");
1929
1930 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1931 if (r < 0)
1932 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1933
1934 r = sd_netlink_message_append_u32(req, IFLA_GROUP, link->network->group);
1935 if (r < 0)
1936 return log_link_error_errno(link, r, "Could not set link group: %m");
1937
1938 r = netlink_call_async(link->manager->rtnl, NULL, req, link_group_handler,
1939 link_netlink_destroy_callback, link);
1940 if (r < 0)
1941 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1942
1943 link_ref(link);
1944
1945 return 0;
1946}
1947
0d4ad91d
AR		 1948static int link_handle_bound_to_list(Link *link) {
1949 Link *l;
0d4ad91d
AR		 1950 int r;
1951 bool required_up = false;
1952 bool link_is_up = false;
1953
1954 assert(link);
1955
1956 if (hashmap_isempty(link->bound_to_links))
1957 return 0;
1958
1959 if (link->flags & IFF_UP)
1960 link_is_up = true;
1961
90e74a66 1962 HASHMAP_FOREACH (l, link->bound_to_links)
0d4ad91d
AR		 1963 if (link_has_carrier(l)) {
1964 required_up = true;
1965 break;
1966 }
1967
1968 if (!required_up && link_is_up) {
8e54db83 1969 r = link_down(link, NULL);
0d4ad91d
AR		 1970 if (r < 0)
1971 return r;
1972 } else if (required_up && !link_is_up) {
1973 r = link_up(link);
1974 if (r < 0)
1975 return r;
1976 }
1977
1978 return 0;
1979}
1980
1981static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 1982 Link *l;
1983 int r;
1984
1985 assert(link);
1986
1987 if (hashmap_isempty(link->bound_by_links))
1988 return 0;
1989
90e74a66 1990 HASHMAP_FOREACH (l, link->bound_by_links) {
0d4ad91d
AR		 1991 r = link_handle_bound_to_list(l);
1992 if (r < 0)
1993 return r;
1994 }
1995
1996 return 0;
1997}
1998
1999static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
2000 int r;
2001
2002 assert(link);
2003 assert(carrier);
2004
2005 if (link == carrier)
2006 return 0;
2007
2008 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
2009 return 0;
2010
2011 r = hashmap_ensure_allocated(h, NULL);
2012 if (r < 0)
2013 return r;
2014
2015 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
2016 if (r < 0)
2017 return r;
2018
2019 return 0;
2020}
2021
2022static int link_new_bound_by_list(Link *link) {
2023 Manager *m;
2024 Link *carrier;
0d4ad91d
AR		 2025 int r;
2026 bool list_updated = false;
2027
2028 assert(link);
2029 assert(link->manager);
2030
2031 m = link->manager;
2032
90e74a66 2033 HASHMAP_FOREACH(carrier, m->links) {
0d4ad91d
AR		 2034 if (!carrier->network)
2035 continue;
2036
2037 if (strv_isempty(carrier->network->bind_carrier))
2038 continue;
2039
191a3f16 2040 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 2041 r = link_put_carrier(link, carrier, &link->bound_by_links);
2042 if (r < 0)
2043 return r;
2044
2045 list_updated = true;
2046 }
2047 }
2048
2049 if (list_updated)
84de38c5 2050 link_dirty(link);
0d4ad91d 2051
90e74a66 2052 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 2053 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2054 if (r < 0)
2055 return r;
2056
84de38c5 2057 link_dirty(carrier);
0d4ad91d
AR		 2058 }
2059
2060 return 0;
2061}
2062
2063static int link_new_bound_to_list(Link *link) {
2064 Manager *m;
2065 Link *carrier;
0d4ad91d
AR		 2066 int r;
2067 bool list_updated = false;
2068
2069 assert(link);
2070 assert(link->manager);
2071
2072 if (!link->network)
2073 return 0;
2074
2075 if (strv_isempty(link->network->bind_carrier))
2076 return 0;
2077
2078 m = link->manager;
2079
90e74a66 2080 HASHMAP_FOREACH (carrier, m->links) {
191a3f16 2081 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 2082 r = link_put_carrier(link, carrier, &link->bound_to_links);
2083 if (r < 0)
2084 return r;
2085
2086 list_updated = true;
2087 }
2088 }
2089
2090 if (list_updated)
84de38c5 2091 link_dirty(link);
0d4ad91d 2092
90e74a66 2093 HASHMAP_FOREACH (carrier, link->bound_to_links) {
0d4ad91d
AR		 2094 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2095 if (r < 0)
2096 return r;
2097
84de38c5 2098 link_dirty(carrier);
0d4ad91d
AR		 2099 }
2100
2101 return 0;
2102}
2103
2104static int link_new_carrier_maps(Link *link) {
2105 int r;
2106
2107 r = link_new_bound_by_list(link);
2108 if (r < 0)
2109 return r;
2110
2111 r = link_handle_bound_by_list(link);
2112 if (r < 0)
2113 return r;
2114
2115 r = link_new_bound_to_list(link);
2116 if (r < 0)
2117 return r;
2118
2119 r = link_handle_bound_to_list(link);
2120 if (r < 0)
2121 return r;
2122
2123 return 0;
2124}
2125
2126static void link_free_bound_to_list(Link *link) {
2127 Link *bound_to;
0d4ad91d 2128
90e74a66 2129 HASHMAP_FOREACH (bound_to, link->bound_to_links) {
0d4ad91d
AR		 2130 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2131
2132 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2133 link_dirty(bound_to);
0d4ad91d
AR		 2134 }
2135
2136 return;
2137}
2138
2139static void link_free_bound_by_list(Link *link) {
2140 Link *bound_by;
0d4ad91d 2141
90e74a66 2142 HASHMAP_FOREACH (bound_by, link->bound_by_links) {
0d4ad91d
AR		 2143 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2144
2145 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2146 link_dirty(bound_by);
0d4ad91d
AR		 2147 link_handle_bound_to_list(bound_by);
2148 }
2149 }
2150
2151 return;
2152}
2153
2154static void link_free_carrier_maps(Link *link) {
2155 bool list_updated = false;
2156
2157 assert(link);
2158
2159 if (!hashmap_isempty(link->bound_to_links)) {
2160 link_free_bound_to_list(link);
2161 list_updated = true;
2162 }
2163
2164 if (!hashmap_isempty(link->bound_by_links)) {
2165 link_free_bound_by_list(link);
2166 list_updated = true;
2167 }
2168
2169 if (list_updated)
84de38c5 2170 link_dirty(link);
0d4ad91d
AR		 2171
2172 return;
2173}
2174
5f707e12
YW		 2175static int link_append_to_master(Link *link, NetDev *netdev) {
2176 Link *master;
2177 int r;
2178
2179 assert(link);
2180 assert(netdev);
2181
2182 r = link_get(link->manager, netdev->ifindex, &master);
2183 if (r < 0)
2184 return r;
2185
de7fef4b 2186 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 2187 if (r <= 0)
5f707e12
YW		 2188 return r;
2189
2190 link_ref(link);
2191 return 0;
2192}
2193
2194static void link_drop_from_master(Link *link, NetDev *netdev) {
2195 Link *master;
2196
2197 assert(link);
2198
2199 if (!link->manager || !netdev)
2200 return;
2201
2202 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2203 return;
2204
2205 link_unref(set_remove(master->slaves, link));
2206}
2207
2208static void link_detach_from_manager(Link *link) {
2209 if (!link || !link->manager)
2210 return;
2211
2212 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2213 link_clean(link);
2214
2215 /* The following must be called at last. */
2216 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2217 link_unref(link);
2218}
2219
0d4ad91d
AR		 2220void link_drop(Link *link) {
2221 if (!link || link->state == LINK_STATE_LINGER)
2222 return;
2223
2224 link_set_state(link, LINK_STATE_LINGER);
2225
2226 link_free_carrier_maps(link);
2227
5f707e12
YW		 2228 if (link->network) {
2229 link_drop_from_master(link, link->network->bridge);
2230 link_drop_from_master(link, link->network->bond);
2231 }
2232
6a7a4e4d 2233 log_link_debug(link, "Link removed");
0d4ad91d 2234
db2f8a2e 2235 (void) unlink(link->state_file);
c4397d94 2236 link_detach_from_manager(link);
0d4ad91d
AR		 2237}
2238
3f265037 2239static int link_joined(Link *link) {
f882c247
TG		 2240 int r;
2241
ef1ba606 2242 assert(link);
f5be5601 2243 assert(link->network);
dd3efc09 2244
0d4ad91d
AR		 2245 if (!hashmap_isempty(link->bound_to_links)) {
2246 r = link_handle_bound_to_list(link);
2247 if (r < 0)
2248 return r;
2249 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2250 r = link_up(link);
2251 if (r < 0) {
2252 link_enter_failed(link);
2253 return r;
2254 }
ef1ba606 2255 }
f882c247 2256
9ed794a3 2257 if (link->network->bridge) {
e1853b00 2258 r = link_set_bridge(link);
6a7a4e4d
LP		 2259 if (r < 0)
2260 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 2261
2262 r = link_append_to_master(link, link->network->bridge);
2263 if (r < 0)
2264 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 2265 }
2266
eb64b435 2267 if (link->network->bond) {
7fcee284 2268 r = link_set_bond(link);
eb64b435
SS		 2269 if (r < 0)
2270 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2271
45e11abf 2272 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2273 if (r < 0)
2274 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2275 }
2276
ffff9abe
TJ		 2277 if (link->network->use_br_vlan &&
2278 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2279 r = link_set_bridge_vlan(link);
2280 if (r < 0)
2281 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2282 }
2283
c1835a42
RM		 2284 /* Skip setting up addresses until it gets carrier,
2285 or it would try to set addresses twice,
2286 which is bad for non-idempotent steps. */
dad2d78e 2287 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2288 return 0;
2289
b425c3ae 2290 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 2291 return link_request_set_addresses(link);
02b59d57
TG		 2292}
2293
302a796f 2294static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2295 int r;
2296
1746cf2a 2297 assert(link);
ef1ba606 2298 assert(link->network);
34bf3c00 2299 assert(link->enslaving > 0);
02b59d57 2300
313cefa1 2301 link->enslaving--;
52433f6b 2302
5da8149f 2303 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2304 return 1;
2305
1c4baffc 2306 r = sd_netlink_message_get_errno(m);
856f962c 2307 if (r < 0 && r != -EEXIST) {
5ecb131d 2308 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG		 2309 link_enter_failed(link);
2310 return 1;
4ff296b0
YW		 2311 }
2312
2313 log_link_debug(link, "Joined netdev");
02b59d57 2314
34bf3c00 2315 if (link->enslaving == 0) {
4ff296b0
YW		 2316 r = link_joined(link);
2317 if (r < 0)
2318 link_enter_failed(link);
34bf3c00 2319 }
02b59d57
TG		 2320
2321 return 1;
2322}
2323
3f265037 2324static int link_enter_join_netdev(Link *link) {
6a0a2f86 2325 NetDev *netdev;
02b59d57
TG		 2326 int r;
2327
2328 assert(link);
2329 assert(link->network);
bd08ce56 2330 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2331
289e6774 2332 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2333
84de38c5 2334 link_dirty(link);
34bf3c00 2335 link->enslaving = 0;
02b59d57 2336
d9c67ea1 2337 if (link->network->bond) {
cbff7170
TJ		 2338 if (link->network->bond->state == NETDEV_STATE_READY &&
2339 link->network->bond->ifindex == link->master_ifindex)
2340 return link_joined(link);
2341
f2341e0a
LP		 2342 log_struct(LOG_DEBUG,
2343 LOG_LINK_INTERFACE(link),
2344 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2345 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2346
34bf3c00
YW		 2347 link->enslaving++;
2348
f2341e0a 2349 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2350 if (r < 0) {
f2341e0a
LP		 2351 log_struct_errno(LOG_WARNING, r,
2352 LOG_LINK_INTERFACE(link),
2353 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2354 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2355 link_enter_failed(link);
2356 return r;
2357 }
0ad6148e
MO		 2358 }
2359
d9c67ea1 2360 if (link->network->bridge) {
f2341e0a
LP		 2361 log_struct(LOG_DEBUG,
2362 LOG_LINK_INTERFACE(link),
2363 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2364 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2365
34bf3c00
YW		 2366 link->enslaving++;
2367
f2341e0a 2368 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2369 if (r < 0) {
f2341e0a
LP		 2370 log_struct_errno(LOG_WARNING, r,
2371 LOG_LINK_INTERFACE(link),
2372 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2373 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2374 link_enter_failed(link);
2375 return r;
2376 }
52433f6b
TG		 2377 }
2378
6cb955c6
AR		 2379 if (link->network->vrf) {
2380 log_struct(LOG_DEBUG,
2381 LOG_LINK_INTERFACE(link),
2382 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2383 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2384
34bf3c00
YW		 2385 link->enslaving++;
2386
6cb955c6
AR		 2387 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2388 if (r < 0) {
2389 log_struct_errno(LOG_WARNING, r,
2390 LOG_LINK_INTERFACE(link),
2391 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2392 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2393 link_enter_failed(link);
2394 return r;
2395 }
6cb955c6
AR		 2396 }
2397
90e74a66 2398 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7951dea2 2399
2b6db913
YW		 2400 if (netdev->ifindex > 0)
2401 /* Assume already enslaved. */
a63e5daa 2402 continue;
a63e5daa 2403
7033af49
YW		 2404 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2405 continue;
2406
f2341e0a
LP		 2407 log_struct(LOG_DEBUG,
2408 LOG_LINK_INTERFACE(link),
2409 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2410 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2411
34bf3c00
YW		 2412 link->enslaving++;
2413
f2341e0a 2414 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2415 if (r < 0) {
f2341e0a
LP		 2416 log_struct_errno(LOG_WARNING, r,
2417 LOG_LINK_INTERFACE(link),
2418 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2419 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2420 link_enter_failed(link);
2421 return r;
2422 }
326cb406
SS		 2423 }
2424
34bf3c00
YW		 2425 if (link->enslaving == 0)
2426 return link_joined(link);
2427
ef1ba606
TG		 2428 return 0;
2429}
2430
769d324c 2431static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2432 int r;
2433
765afd5c 2434 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2435 return 0;
2436
765afd5c
LP		 2437 /* We propagate the forwarding flag from one interface to the
2438 * global setting one way. This means: as long as at least one
2439 * interface was configured at any time that had IP forwarding
2440 * enabled the setting will stay on for good. We do this
2441 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2442 * somewhat in sync (see below). */
15dee3f0 2443
62e021a9 2444 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2445 if (r < 0)
765afd5c 2446 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2447
769d324c
LP		 2448 return 0;
2449}
2450
2451static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2452 int r;
2453
765afd5c 2454 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2455 return 0;
2456
61233823 2457 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2458 * packet forwarding setting: either packet forwarding is on
2459 * for all, or off for all. We hence don't bother with a
2460 * per-interface setting, but simply propagate the interface
2461 * flag, if it is set, to the global flag, one-way. Note that
2462 * while IPv4 would allow a per-interface flag, we expose the
2463 * same behaviour there and also propagate the setting from
2464 * one to all, to keep things simple (see above). */
15dee3f0 2465
62e021a9 2466 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2467 if (r < 0)
765afd5c 2468 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2469
2470 return 0;
2471}
2472
49092e22 2473static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2474 IPv6PrivacyExtensions s;
49092e22
SS		 2475 int r;
2476
1f0d9695 2477 s = link_ipv6_privacy_extensions(link);
66a6bd68 2478 if (s < 0)
49092e22
SS		 2479 return 0;
2480
62e021a9 2481 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2482 if (r < 0)
49092e22
SS		 2483 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2484
2485 return 0;
2486}
2487
4f2e437a 2488static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2489 int r;
2490
2491 /* Make this a NOP if IPv6 is not available */
2492 if (!socket_ipv6_is_supported())
2493 return 0;
2494
2495 if (link->flags & IFF_LOOPBACK)
2496 return 0;
2497
d68e2e59
LP		 2498 if (!link->network)
2499 return 0;
2500
62e021a9 2501 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2502 if (r < 0)
fe307276 2503 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2504
2505 return 0;
2506}
2507
8749cbcd 2508static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2509 int r;
2510
2511 /* Make this a NOP if IPv6 is not available */
2512 if (!socket_ipv6_is_supported())
2513 return 0;
2514
2515 if (link->flags & IFF_LOOPBACK)
2516 return 0;
2517
d68e2e59
LP		 2518 if (!link->network)
2519 return 0;
2520
8749cbcd
SS		 2521 if (link->network->ipv6_dad_transmits < 0)
2522 return 0;
2523
62e021a9 2524 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2525 if (r < 0)
8749cbcd 2526 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2527
2528 return 0;
2529}
2530
b69c3180 2531static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2532 int r;
2533
2534 /* Make this a NOP if IPv6 is not available */
2535 if (!socket_ipv6_is_supported())
2536 return 0;
2537
2538 if (link->flags & IFF_LOOPBACK)
2539 return 0;
2540
d68e2e59
LP		 2541 if (!link->network)
2542 return 0;
2543
b69c3180
SS		 2544 if (link->network->ipv6_hop_limit < 0)
2545 return 0;
2546
62e021a9 2547 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2548 if (r < 0)
b69c3180 2549 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2550
2551 return 0;
2552}
2553
11102cba 2554static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2555 int r;
2556
2557 /* Make this a NOP if IPv6 is not available */
2558 if (!socket_ipv6_is_supported())
2559 return 0;
2560
2561 if (link->flags & IFF_LOOPBACK)
2562 return 0;
2563
2564 if (link->network->ipv6_mtu == 0)
2565 return 0;
2566
d236718c
DS		 2567 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
2568 * on the interface. Bump up IPv6 MTU bytes to IPV6_MTU_MIN. */
2569 if (link->network->ipv6_mtu < IPV6_MIN_MTU) {
2570 log_link_notice(link, "Bumping IPv6 MTU to "STRINGIFY(IPV6_MIN_MTU)" byte minimum required");
2571 link->network->ipv6_mtu = IPV6_MIN_MTU;
2572 }
2573
62e021a9 2574 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
d236718c
DS		 2575 if (r < 0) {
2576 if (link->mtu < link->network->ipv6_mtu)
2577 log_link_warning(link, "Cannot set IPv6 MTU %"PRIu32" higher than device MTU %"PRIu32,
2578 link->network->ipv6_mtu, link->mtu);
2579 else
2580 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2581 }
2582
2583 link->ipv6_mtu_set = true;
11102cba
SS		 2584
2585 return 0;
2586}
2587
94d76d07
YW		 2588static int link_set_ipv4_accept_local(Link *link) {
2589 int r;
2590
2591 if (link->flags & IFF_LOOPBACK)
2592 return 0;
2593
2594 if (link->network->ipv4_accept_local < 0)
2595 return 0;
2596
2597 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "accept_local", link->network->ipv4_accept_local);
2598 if (r < 0)
2599 log_link_warning_errno(link, r, "Cannot set IPv4 accept_local flag for interface: %m");
2600
2601 return 0;
2602}
2603
30226d27
TJ		 2604static bool link_is_static_address_configured(Link *link, Address *address) {
2605 Address *net_address;
2606
2607 assert(link);
2608 assert(address);
2609
2610 if (!link->network)
2611 return false;
2612
2613 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2614 if (address_equal(net_address, address))
2615 return true;
6f5d73ab
YW		 2616 else if (address->family == AF_INET6 && net_address->family == AF_INET6 &&
2617 in_addr_equal(AF_INET6, &address->in_addr, &net_address->in_addr_peer) > 0)
2618 return true;
30226d27
TJ		 2619
2620 return false;
2621}
2622
d1bdafd2
WKI		 2623static bool link_is_neighbor_configured(Link *link, Neighbor *neighbor) {
2624 Neighbor *net_neighbor;
2625
2626 assert(link);
2627 assert(neighbor);
2628
2629 if (!link->network)
2630 return false;
2631
2632 LIST_FOREACH(neighbors, net_neighbor, link->network->neighbors)
2633 if (neighbor_equal(net_neighbor, neighbor))
2634 return true;
2635
2636 return false;
2637}
2638
7ecf0c3e
TJ		 2639static bool link_is_static_route_configured(Link *link, Route *route) {
2640 Route *net_route;
2641
2642 assert(link);
2643 assert(route);
2644
2645 if (!link->network)
2646 return false;
2647
2648 LIST_FOREACH(routes, net_route, link->network->static_routes)
2649 if (route_equal(net_route, route))
2650 return true;
2651
2652 return false;
2653}
2654
db51778f
YW		 2655static bool link_address_is_dynamic(Link *link, Address *address) {
2656 Route *route;
db51778f
YW		 2657
2658 assert(link);
2659 assert(address);
2660
2661 if (address->cinfo.ifa_prefered != CACHE_INFO_INFINITY_LIFE_TIME)
2662 return true;
2663
2664 /* Even when the address is leased from a DHCP server, networkd assign the address
2665 * without lifetime when KeepConfiguration=dhcp. So, let's check that we have
2666 * corresponding routes with RTPROT_DHCP. */
90e74a66 2667 SET_FOREACH(route, link->routes_foreign) {
db51778f
YW		 2668 if (route->protocol != RTPROT_DHCP)
2669 continue;
2670
2671 if (address->family != route->family)
2672 continue;
2673
2674 if (in_addr_equal(address->family, &address->in_addr, &route->prefsrc))
2675 return true;
2676 }
2677
2678 return false;
2679}
2680
0917a271
DS		 2681static int link_enumerate_ipv6_tentative_addresses(Link *link) {
2682 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
2683 sd_netlink_message *addr;
2684 int r;
2685
2686 assert(link);
2687 assert(link->manager);
2688 assert(link->manager->rtnl);
2689
2690 r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_GETADDR, 0, AF_INET6);
2691 if (r < 0)
2692 return r;
2693
2694 r = sd_netlink_call(link->manager->rtnl, req, 0, &reply);
2695 if (r < 0)
2696 return r;
2697
2698 for (addr = reply; addr; addr = sd_netlink_message_next(addr)) {
2699 unsigned char flags;
2700 int ifindex;
2701
2702 r = sd_rtnl_message_addr_get_ifindex(addr, &ifindex);
2703 if (r < 0) {
2704 log_link_warning_errno(link, r, "rtnl: invalid ifindex, ignoring: %m");
2705 continue;
2706 } else if (link->ifindex != ifindex)
2707 continue;
2708
2709 r = sd_rtnl_message_addr_get_flags(addr, &flags);
2710 if (r < 0) {
2711 log_link_warning_errno(link, r, "rtnl: received address message with invalid flags, ignoring: %m");
2712 continue;
2713 } else if (!(flags & IFA_F_TENTATIVE))
2714 continue;
2715
2716 log_link_debug(link, "Found tentative ipv6 link-local address");
2717 (void) manager_rtnl_process_address(link->manager->rtnl, addr, link->manager);
2718 }
2719
2720 return 0;
2721}
2722
5e5b137a
TG		 2723static int link_drop_foreign_config(Link *link) {
2724 Address *address;
d1bdafd2 2725 Neighbor *neighbor;
5e5b137a 2726 Route *route;
5e5b137a
TG		 2727 int r;
2728
0917a271
DS		 2729 /* The kernel doesn't notify us about tentative addresses;
2730 * so if ipv6ll is disabled, we need to enumerate them now so we can drop them below */
2731 if (!link_ipv6ll_enabled(link)) {
2732 r = link_enumerate_ipv6_tentative_addresses(link);
2733 if (r < 0)
2734 return r;
2735 }
2736
90e74a66 2737 SET_FOREACH(address, link->addresses_foreign) {
fe307276 2738 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2739 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
5e5b137a
TG		 2740 continue;
2741
db51778f 2742 if (link_address_is_dynamic(link, address)) {
b1b0b42e 2743 if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
db51778f 2744 continue;
b1b0b42e 2745 } else if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
db51778f
YW		 2746 continue;
2747
30226d27
TJ		 2748 if (link_is_static_address_configured(link, address)) {
2749 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2750 if (r < 0)
2751 return log_link_error_errno(link, r, "Failed to add address: %m");
2752 } else {
63ae0569 2753 r = address_remove(address, link, NULL);
30226d27
TJ		 2754 if (r < 0)
2755 return r;
2756 }
5e5b137a
TG		 2757 }
2758
90e74a66 2759 SET_FOREACH(neighbor, link->neighbors_foreign) {
d1bdafd2
WKI		 2760 if (link_is_neighbor_configured(link, neighbor)) {
2761 r = neighbor_add(link, neighbor->family, &neighbor->in_addr, &neighbor->lladdr, neighbor->lladdr_size, NULL);
2762 if (r < 0)
2763 return r;
2764 } else {
2765 r = neighbor_remove(neighbor, link, NULL);
2766 if (r < 0)
2767 return r;
2768 }
2769 }
2770
90e74a66 2771 SET_FOREACH(route, link->routes_foreign) {
fe307276 2772 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2773 if (route->protocol == RTPROT_KERNEL)
2774 continue;
2775
bd7d6cec
YW		 2776 /* do not touch multicast route added by kernel */
2777 /* FIXME: Why the kernel adds this route with protocol RTPROT_BOOT??? We need to investigate that.
2778 * https://tools.ietf.org/html/rfc4862#section-5.4 may explain why. */
2779 if (route->protocol == RTPROT_BOOT &&
2780 route->family == AF_INET6 &&
2781 route->dst_prefixlen == 8 &&
2782 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 }}} }))
2783 continue;
2784
b1b0b42e 2785 if (route->protocol == RTPROT_STATIC && link->network &&
db51778f
YW		 2786 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2787 continue;
2788
b1b0b42e 2789 if (route->protocol == RTPROT_DHCP && link->network &&
db51778f
YW		 2790 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2791 continue;
2792
7ecf0c3e 2793 if (link_is_static_route_configured(link, route)) {
f1368755 2794 r = route_add(link, route, NULL);
7ecf0c3e
TJ		 2795 if (r < 0)
2796 return r;
2797 } else {
4645ad47 2798 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2799 if (r < 0)
2800 return r;
2801 }
5e5b137a
TG		 2802 }
2803
2804 return 0;
2805}
2806
9b966cee
YW		 2807static int remove_static_address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2808 int r;
2809
2810 assert(m);
2811 assert(link);
2812 assert(link->ifname);
2813 assert(link->address_remove_messages > 0);
2814
2815 link->address_remove_messages--;
2816
2817 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2818 return 1;
2819
2820 r = sd_netlink_message_get_errno(m);
2821 if (r < 0 && r != -EADDRNOTAVAIL)
2822 log_link_message_warning_errno(link, m, r, "Could not drop address");
2823 else if (r >= 0)
2824 (void) manager_rtnl_process_address(rtnl, m, link->manager);
2825
2826 if (link->address_remove_messages == 0 && link->request_static_addresses) {
2827 link_set_state(link, LINK_STATE_CONFIGURING);
2828 r = link_request_set_addresses(link);
2829 if (r < 0)
2830 link_enter_failed(link);
2831 }
2832
2833 return 1;
2834}
2835
3104883d 2836static int link_drop_config(Link *link) {
410a7f15 2837 Address *address, *pool_address;
d1bdafd2 2838 Neighbor *neighbor;
3104883d 2839 Route *route;
3104883d
SS		 2840 int r;
2841
90e74a66 2842 SET_FOREACH(address, link->addresses) {
3104883d 2843 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2844 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
3104883d
SS		 2845 continue;
2846
9b966cee 2847 r = address_remove(address, link, remove_static_address_handler);
3104883d
SS		 2848 if (r < 0)
2849 return r;
410a7f15 2850
9b966cee
YW		 2851 link->address_remove_messages++;
2852
410a7f15 2853 /* If this address came from an address pool, clean up the pool */
b6766fb1 2854 LIST_FOREACH(addresses, pool_address, link->pool_addresses)
410a7f15
RM		 2855 if (address_equal(address, pool_address)) {
2856 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2857 address_free(pool_address);
2858 break;
2859 }
3104883d
SS		 2860 }
2861
90e74a66 2862 SET_FOREACH(neighbor, link->neighbors) {
d1bdafd2
WKI		 2863 r = neighbor_remove(neighbor, link, NULL);
2864 if (r < 0)
2865 return r;
2866 }
2867
90e74a66 2868 SET_FOREACH(route, link->routes) {
3104883d
SS		 2869 /* do not touch routes managed by the kernel */
2870 if (route->protocol == RTPROT_KERNEL)
2871 continue;
2872
4645ad47 2873 r = route_remove(route, link, NULL);
3104883d
SS		 2874 if (r < 0)
2875 return r;
2876 }
2877
c69305ff
LP		 2878 ndisc_flush(link);
2879
3104883d
SS		 2880 return 0;
2881}
2882
051e77ca
SS		 2883static int link_configure_ipv4_dad(Link *link) {
2884 Address *address;
2885 int r;
2886
2887 assert(link);
2888 assert(link->network);
2889
2890 LIST_FOREACH(addresses, address, link->network->static_addresses)
2891 if (address->family == AF_INET &&
2892 FLAGS_SET(address->duplicate_address_detection, ADDRESS_FAMILY_IPV4)) {
2893 r = configure_ipv4_duplicate_address_detection(link, address);
2894 if (r < 0)
2895 return log_link_error_errno(link, r, "Failed to configure IPv4ACD: %m");
2896 }
2897
2898 return 0;
2899}
2900
34658df2
YW		 2901static int link_configure_traffic_control(Link *link) {
2902 TrafficControl *tc;
02b59d57
TG		 2903 int r;
2904
34658df2
YW		 2905 link->tc_configured = false;
2906 link->tc_messages = 0;
4ecdcb07 2907
90e74a66 2908 ORDERED_HASHMAP_FOREACH(tc, link->network->tc_by_section) {
34658df2 2909 r = traffic_control_configure(link, tc);
4ecdcb07
YW		 2910 if (r < 0)
2911 return r;
2912 }
2913
34658df2
YW		 2914 if (link->tc_messages == 0)
2915 link->tc_configured = true;
4ecdcb07 2916 else
34658df2 2917 log_link_debug(link, "Configuring traffic control");
4ecdcb07
YW		 2918
2919 return 0;
2920}
2921
518cd6b5
SS		 2922static int link_configure_sr_iov(Link *link) {
2923 SRIOV *sr_iov;
518cd6b5
SS		 2924 int r;
2925
2926 link->sr_iov_configured = false;
2927 link->sr_iov_messages = 0;
2928
90e74a66 2929 ORDERED_HASHMAP_FOREACH(sr_iov, link->network->sr_iov_by_section) {
518cd6b5
SS		 2930 r = sr_iov_configure(link, sr_iov);
2931 if (r < 0)
2932 return r;
2933 }
2934
2935 if (link->sr_iov_messages == 0)
2936 link->sr_iov_configured = true;
2937 else
2938 log_link_debug(link, "Configuring SR-IOV");
2939
2940 return 0;
2941}
2942
4ecdcb07
YW		 2943static int link_configure(Link *link) {
2944 int r;
2945
ef1ba606 2946 assert(link);
b22d8a00 2947 assert(link->network);
bd08ce56 2948 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2949
34658df2 2950 r = link_configure_traffic_control(link);
4ecdcb07
YW		 2951 if (r < 0)
2952 return r;
2953
518cd6b5
SS		 2954 r = link_configure_sr_iov(link);
2955 if (r < 0)
2956 return r;
2957
500b96eb 2958 if (link->iftype == ARPHRD_CAN)
93ea7750 2959 return link_configure_can(link);
92c918b0 2960
482efedc
SS		 2961 /* If IPv6 configured that is static IPv6 address and IPv6LL autoconfiguration is enabled
2962 * for this interface, then enable IPv6 */
57ad7607 2963 (void) link_update_ipv6_sysctl(link);
482efedc 2964
23d8b221
SS		 2965 r = link_set_proxy_arp(link);
2966 if (r < 0)
2967 return r;
2968
a0e5c15d
FK		 2969 r = ipv6_proxy_ndp_addresses_configure(link);
2970 if (r < 0)
2971 return r;
2972
769d324c
LP		 2973 r = link_set_ipv4_forward(link);
2974 if (r < 0)
2975 return r;
2976
2977 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2978 if (r < 0)
2979 return r;
2980
49092e22
SS		 2981 r = link_set_ipv6_privacy_extensions(link);
2982 if (r < 0)
2983 return r;
2984
4f2e437a
SS		 2985 r = link_set_ipv6_accept_ra(link);
2986 if (r < 0)
2987 return r;
2988
8749cbcd
SS		 2989 r = link_set_ipv6_dad_transmits(link);
2990 if (r < 0)
2991 return r;
b69c3180
SS		 2992
2993 r = link_set_ipv6_hop_limit(link);
2994 if (r < 0)
2995 return r;
8749cbcd 2996
94d76d07
YW		 2997 r = link_set_ipv4_accept_local(link);
2998 if (r < 0)
2999 return r;
3000
99d2baa2
SS		 3001 r = link_set_flags(link);
3002 if (r < 0)
3003 return r;
3004
89fe6535
SS		 3005 r = link_set_group(link);
3006 if (r < 0)
3007 return r;
3008
910feb78 3009 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
b22d8a00 3010 r = ipv4ll_configure(link);
eb34d4af
TG		 3011 if (r < 0)
3012 return r;
3013 }
3014
78c958f8 3015 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 3016 r = dhcp4_set_promote_secondaries(link);
3017 if (r < 0)
3018 return r;
3019
3c9b8860 3020 r = dhcp4_configure(link);
eb34d4af
TG		 3021 if (r < 0)
3022 return r;
eb34d4af
TG		 3023 }
3024
78c958f8 3025 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 3026 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
3027 if (r < 0)
3028 return r;
3029
3030 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
3031 if (r < 0)
3032 return r;
dd43110f
TG		 3033 }
3034
62379e88
TG		 3035 if (link_dhcp6_enabled(link) ||
3036 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 3037 r = dhcp6_configure(link);
3038 if (r < 0)
3039 return r;
3040 }
3041
3042 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 3043 r = ndisc_configure(link);
4138fb2c
PF		 3044 if (r < 0)
3045 return r;
3046 }
3047
7465dd22
PF		 3048 if (link_radv_enabled(link)) {
3049 r = radv_configure(link);
3050 if (r < 0)
3051 return r;
3052 }
3053
8e1ad1ea 3054 if (link_lldp_rx_enabled(link)) {
7f853950 3055 r = link_lldp_rx_configure(link);
273eec24
LP		 3056 if (r < 0)
3057 return r;
ce43e484
SS		 3058 }
3059
f6fcc1c2 3060 r = link_configure_mtu(link);
40288ece
YW		 3061 if (r < 0)
3062 return r;
44b598a1 3063
9f6e82e6
YW		 3064 r = link_configure_addrgen_mode(link);
3065 if (r < 0)
3066 return r;
0e2fdb83 3067
051e77ca
SS		 3068 r = link_configure_ipv4_dad(link);
3069 if (r < 0)
3070 return r;
3071
3a390124
DS		 3072 return link_configure_continue(link);
3073}
3074
3075/* The configuration continues in this separate function, instead of
3076 * including this in the above link_configure() function, for two
3077 * reasons:
3078 * 1) some devices reset the link when the mtu is set, which caused
3079 * an infinite loop here in networkd; see:
3080 * https://github.com/systemd/systemd/issues/6593
3081 * https://github.com/systemd/systemd/issues/9831
3082 * 2) if ipv6ll is disabled, then bringing the interface up must be
3083 * delayed until after we get confirmation from the kernel that
3084 * the addr_gen_mode parameter has been set (via netlink), see:
3085 * https://github.com/systemd/systemd/issues/13882
3086 */
3087static int link_configure_continue(Link *link) {
55dc8c4a
YW		 3088 int r;
3089
3090 assert(link);
3091 assert(link->network);
bd08ce56 3092 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a 3093
9524014e 3094 if (link->setting_mtu || link->setting_genmode)
55dc8c4a
YW		 3095 return 0;
3096
4c649652
DS		 3097 /* Drop foreign config, but ignore loopback or critical devices.
3098 * We do not want to remove loopback address or addresses used for root NFS. */
3099 if (!(link->flags & IFF_LOOPBACK) &&
3100 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
3101 r = link_drop_foreign_config(link);
3102 if (r < 0)
3103 return r;
3104 }
3105
d236718c
DS		 3106 /* The kernel resets ipv6 mtu after changing device mtu;
3107 * we must set this here, after we've set device mtu */
3108 r = link_set_ipv6_mtu(link);
3109 if (r < 0)
3110 return r;
3111
dad2d78e 3112 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 3113 r = link_acquire_conf(link);
3114 if (r < 0)
3115 return r;
cc544d5f 3116 }
1e9be60b 3117
3f265037 3118 return link_enter_join_netdev(link);
505f8da7
TG		 3119}
3120
27dfc982
YW		 3121static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
3122 assert(duid);
3123
3124 if (duid->raw_data_len > 0)
3125 return 0;
3126
3127 if (duid->type != DUID_TYPE_UUID)
3128 return -EINVAL;
3129
3130 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
3131 duid->raw_data_len = sizeof(sd_id128_t);
3132
3133 return 1;
3134}
3135
3136int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
3137 Manager *manager = userdata;
3138 const sd_bus_error *e;
3139 const void *a;
3140 size_t sz;
3141 DUID *duid;
3142 Link *link;
3143 int r;
3144
3145 assert(m);
3146 assert(manager);
3147
3148 e = sd_bus_message_get_error(m);
3149 if (e) {
3150 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 3151 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 3152 e->message);
3153 goto configure;
3154 }
3155
3156 r = sd_bus_message_read_array(m, 'y', &a, &sz);
3157 if (r < 0)
3158 goto configure;
3159
3160 if (sz != sizeof(sd_id128_t)) {
ab4dd984 3161 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 3162 goto configure;
3163 }
3164
3165 memcpy(&manager->product_uuid, a, sz);
3166 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
3167 (void) duid_set_uuid(duid, manager->product_uuid);
3168
3169 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
3170
3171configure:
3172 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3dc2e7af
YW		 3173 link_unref(link);
3174
27dfc982
YW		 3175 r = link_configure(link);
3176 if (r < 0)
4ff296b0 3177 link_enter_failed(link);
27dfc982
YW		 3178 }
3179
3180 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
3181
3182 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
3183 * even if the method fails. */
3184 manager->has_product_uuid = true;
3185
3186 return 1;
3187}
3188
3189static bool link_requires_uuid(Link *link) {
3190 const DUID *duid;
3191
3192 assert(link);
3193 assert(link->manager);
3194 assert(link->network);
3195
3196 duid = link_get_duid(link);
3197 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
3198 return false;
3199
3200 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
3201 return true;
3202
3203 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
3204 return true;
3205
3206 return false;
3207}
3208
3209static int link_configure_duid(Link *link) {
3210 Manager *m;
3211 DUID *duid;
3212 int r;
3213
3214 assert(link);
3215 assert(link->manager);
3216 assert(link->network);
3217
3218 m = link->manager;
3219 duid = link_get_duid(link);
3220
3221 if (!link_requires_uuid(link))
3222 return 1;
3223
3224 if (m->has_product_uuid) {
3225 (void) duid_set_uuid(duid, m->product_uuid);
3226 return 1;
3227 }
3228
3229 if (!m->links_requesting_uuid) {
3230 r = manager_request_product_uuid(m, link);
3231 if (r < 0) {
3232 if (r == -ENOMEM)
3233 return r;
3234
ab4dd984
ZJS		 3235 log_link_warning_errno(link, r,
3236 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 3237 return 1;
3238 }
3239 } else {
3240 r = set_put(m->links_requesting_uuid, link);
3241 if (r < 0)
3242 return log_oom();
39dbd0c7
ZJS		 3243 if (r > 0)
3244 link_ref(link);
27dfc982
YW		 3245
3246 r = set_put(m->duids_requesting_uuid, duid);
3247 if (r < 0)
3248 return log_oom();
3249 }
3250
3251 return 0;
3252}
3253
572b21d9 3254static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
ad932b15
YW		 3255 Network *network;
3256 int r;
3257
572b21d9
YW		 3258 if (m) {
3259 _cleanup_strv_free_ char **s = NULL;
3260
3261 r = sd_netlink_message_get_errno(m);
3262 if (r < 0)
3263 return r;
3264
3265 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3266 if (r < 0 && r != -ENODATA)
3267 return r;
3268
3269 strv_free_and_replace(link->alternative_names, s);
3270 }
3271
c643bda5
YW		 3272 r = network_get(link->manager, link->iftype, link->sd_device,
3273 link->ifname, link->alternative_names, link->driver,
3274 &link->mac, &link->permanent_mac,
3275 link->wlan_iftype, link->ssid, &link->bssid, &network);
ad932b15
YW		 3276 if (r == -ENOENT) {
3277 link_enter_unmanaged(link);
3278 return 0;
3279 } else if (r == 0 && network->unmanaged) {
3280 link_enter_unmanaged(link);
3281 return 0;
3282 } else if (r < 0)
3283 return r;
3284
99b8517c 3285 if (link->network == network && !force)
ad932b15
YW		 3286 return 0;
3287
3288 log_link_info(link, "Re-configuring with %s", network->filename);
3289
3290 /* Dropping old .network file */
3291 r = link_stop_clients(link, false);
572b21d9 3292 if (r < 0)
ad932b15 3293 return r;
ad932b15
YW		 3294
3295 if (link_dhcp4_server_enabled(link))
3296 (void) sd_dhcp_server_stop(link->dhcp_server);
3297
3298 r = link_drop_config(link);
3299 if (r < 0)
3300 return r;
3301
2c7b826d 3302 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
ad932b15
YW		 3303 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
3304 r = link_drop_foreign_config(link);
3305 if (r < 0)
3306 return r;
3307 }
3308
3309 link_free_carrier_maps(link);
3310 link_free_engines(link);
3311 link->network = network_unref(link->network);
3312
3313 /* Then, apply new .network file */
3314 r = network_apply(network, link);
3315 if (r < 0)
3316 return r;
3317
3318 r = link_new_carrier_maps(link);
3319 if (r < 0)
3320 return r;
3321
3322 link_set_state(link, LINK_STATE_INITIALIZED);
8ae7b8a1 3323 link_dirty(link);
ad932b15
YW		 3324
3325 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3326 * link_configure() is called later asynchronously. */
3327 r = link_configure_duid(link);
3328 if (r <= 0)
3329 return r;
3330
3331 r = link_configure(link);
3332 if (r < 0)
3333 return r;
3334
3335 return 0;
3336}
3337
572b21d9
YW		 3338static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3339 int r;
3340
3341 r = link_reconfigure_internal(link, m, false);
3342 if (r < 0)
3343 link_enter_failed(link);
3344
3345 return 1;
3346}
3347
3348static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3349 int r;
3350
3351 r = link_reconfigure_internal(link, m, true);
3352 if (r < 0)
3353 link_enter_failed(link);
3354
3355 return 1;
3356}
3357
3358int link_reconfigure(Link *link, bool force) {
3359 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
3360 int r;
3361
2c0d7ed3
YW		 3362 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
3363 return 0;
3364
572b21d9
YW		 3365 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3366 link->ifindex);
3367 if (r < 0)
3368 return r;
3369
3370 r = netlink_call_async(link->manager->rtnl, NULL, req,
3371 force ? link_force_reconfigure_handler : link_reconfigure_handler,
3372 link_netlink_destroy_callback, link);
3373 if (r < 0)
3374 return r;
3375
3376 link_ref(link);
3377
3378 return 0;
3379}
3380
e6bf7774 3381static int link_initialized_and_synced(Link *link) {
505f8da7 3382 Network *network;
505f8da7
TG		 3383 int r;
3384
3385 assert(link);
3386 assert(link->ifname);
3387 assert(link->manager);
3388
bd08ce56
YW		 3389 /* We may get called either from the asynchronous netlink callback,
3390 * or directly for link_add() if running in a container. See link_add(). */
3391 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 3392 return 0;
505f8da7 3393
6a7a4e4d 3394 log_link_debug(link, "Link state is up-to-date");
bd08ce56 3395 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 3396
0d4ad91d
AR		 3397 r = link_new_bound_by_list(link);
3398 if (r < 0)
3399 return r;
3400
3401 r = link_handle_bound_by_list(link);
3402 if (r < 0)
3403 return r;
3404
c4a03a56 3405 if (!link->network) {
0894cfe4 3406 r = wifi_get_info(link);
8d968fdd
YW		 3407 if (r < 0)
3408 return r;
3409
c643bda5
YW		 3410 r = network_get(link->manager, link->iftype, link->sd_device,
3411 link->ifname, link->alternative_names, link->driver,
3412 &link->mac, &link->permanent_mac,
3413 link->wlan_iftype, link->ssid, &link->bssid, &network);
c4a03a56
TG		 3414 if (r == -ENOENT) {
3415 link_enter_unmanaged(link);
4232cf04 3416 return 0;
a09dc546
DM		 3417 } else if (r == 0 && network->unmanaged) {
3418 link_enter_unmanaged(link);
3419 return 0;
c4a03a56
TG		 3420 } else if (r < 0)
3421 return r;
505f8da7 3422
c4a03a56
TG		 3423 if (link->flags & IFF_LOOPBACK) {
3424 if (network->link_local != ADDRESS_FAMILY_NO)
3425 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3426
c4a03a56
TG		 3427 if (network->dhcp != ADDRESS_FAMILY_NO)
3428 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3429
c4a03a56
TG		 3430 if (network->dhcp_server)
3431 log_link_debug(link, "Ignoring DHCP server for loopback link");
3432 }
bd2efe92 3433
7d342c03 3434 r = network_apply(network, link);
c4a03a56
TG		 3435 if (r < 0)
3436 return r;
3437 }
505f8da7 3438
0d4ad91d
AR		 3439 r = link_new_bound_to_list(link);
3440 if (r < 0)
3441 return r;
3442
27dfc982
YW		 3443 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3444 * link_configure() is called later asynchronously. */
3445 r = link_configure_duid(link);
3446 if (r <= 0)
3447 return r;
3448
a748b692
TG		 3449 r = link_configure(link);
3450 if (r < 0)
3451 return r;
3452
4232cf04 3453 return 0;
505f8da7
TG		 3454}
3455
302a796f 3456static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
572b21d9 3457 _cleanup_strv_free_ char **s = NULL;
4ff296b0
YW		 3458 int r;
3459
572b21d9
YW		 3460 r = sd_netlink_message_get_errno(m);
3461 if (r < 0) {
40681e5c 3462 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 3463 link_enter_failed(link);
3464 return 0;
3465 }
3466
3467 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3468 if (r < 0 && r != -ENODATA) {
3469 link_enter_failed(link);
3470 return 0;
3471 }
3472
3473 strv_free_and_replace(link->alternative_names, s);
3474
4ff296b0
YW		 3475 r = link_initialized_and_synced(link);
3476 if (r < 0)
3477 link_enter_failed(link);
e6bf7774
YW		 3478 return 1;
3479}
3480
51517f9e 3481int link_initialized(Link *link, sd_device *device) {
4afd3348 3482 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3483 int r;
3484
3485 assert(link);
3486 assert(link->manager);
3487 assert(link->manager->rtnl);
3488 assert(device);
3489
8434fd5c 3490 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3491 return 0;
3492
51517f9e 3493 if (link->sd_device)
679b3605
TG		 3494 return 0;
3495
79008bdd 3496 log_link_debug(link, "udev initialized link");
bd08ce56 3497 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 3498
51517f9e 3499 link->sd_device = sd_device_ref(device);
4f561e8e 3500
3c9b8860
TG		 3501 /* udev has initialized the link, but we don't know if we have yet
3502 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3503 * when it returns we know that the pending NEWLINKs have already been
3504 * processed and that we are up-to-date */
4f561e8e 3505
3c9b8860
TG		 3506 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3507 link->ifindex);
4f561e8e
TG		 3508 if (r < 0)
3509 return r;
3510
302a796f
YW		 3511 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3512 link_netlink_destroy_callback, link);
4f561e8e
TG		 3513 if (r < 0)
3514 return r;
3515
5da8149f
TG		 3516 link_ref(link);
3517
4f561e8e
TG		 3518 return 0;
3519}
3520
c4a03a56 3521static int link_load(Link *link) {
0bc70f1d
TG		 3522 _cleanup_free_ char *network_file = NULL,
3523 *addresses = NULL,
f703cc2c 3524 *routes = NULL,
0bc70f1d
TG		 3525 *dhcp4_address = NULL,
3526 *ipv4ll_address = NULL;
3527 union in_addr_union address;
c4a03a56
TG		 3528 int r;
3529
3530 assert(link);
3531
aa8fbc74 3532 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3533 "NETWORK_FILE", &network_file,
3534 "ADDRESSES", &addresses,
f703cc2c 3535 "ROUTES", &routes,
0bc70f1d 3536 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3537 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3538 if (r < 0 && r != -ENOENT)
3539 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3540
3541 if (network_file) {
3542 Network *network;
3543 char *suffix;
3544
3545 /* drop suffix */
3546 suffix = strrchr(network_file, '.');
3547 if (!suffix) {
3548 log_link_debug(link, "Failed to get network name from %s", network_file);
3549 goto network_file_fail;
3550 }
3551 *suffix = '\0';
3552
3553 r = network_get_by_name(link->manager, basename(network_file), &network);
3554 if (r < 0) {
3555 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3556 goto network_file_fail;
3557 }
3558
7d342c03 3559 r = network_apply(network, link);
c4a03a56
TG		 3560 if (r < 0)
3561 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3562 }
3563
3564network_file_fail:
3565
1f68f772
ZJS		 3566 for (const char *p = addresses; p; ) {
3567 _cleanup_free_ char *address_str = NULL;
3568 char *prefixlen_str;
3569 int family;
3570 unsigned char prefixlen;
c4a03a56 3571
1f68f772
ZJS		 3572 r = extract_first_word(&p, &address_str, NULL, 0);
3573 if (r < 0)
3574 log_link_warning_errno(link, r, "failed to parse ADDRESSES: %m");
3575 if (r <= 0)
3576 break;
c4a03a56 3577
1f68f772
ZJS		 3578 prefixlen_str = strchr(address_str, '/');
3579 if (!prefixlen_str) {
3580 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
3581 continue;
3582 }
3583 *prefixlen_str++ = '\0';
c4a03a56 3584
1f68f772
ZJS		 3585 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3586 if (r != 1) {
3587 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3588 continue;
3589 }
c4a03a56 3590
1f68f772
ZJS		 3591 r = in_addr_from_string_auto(address_str, &family, &address);
3592 if (r < 0) {
3593 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
3594 continue;
c4a03a56 3595 }
c4a03a56 3596
1f68f772
ZJS		 3597 r = address_add(link, family, &address, prefixlen, NULL);
3598 if (r < 0)
3599 return log_link_error_errno(link, r, "Failed to add address: %m");
3600 }
74544b4e 3601
1f68f772
ZJS		 3602 for (const char *p = routes; p; ) {
3603 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
3604 _cleanup_(route_freep) Route *tmp = NULL;
3605 _cleanup_free_ char *route_str = NULL;
3606 char *prefixlen_str;
3607 Route *route;
f703cc2c 3608
1f68f772
ZJS		 3609 r = extract_first_word(&p, &route_str, NULL, 0);
3610 if (r < 0)
3611 log_link_debug_errno(link, r, "failed to parse ROUTES: %m");
3612 if (r <= 0)
3613 break;
c598ac76 3614
1f68f772
ZJS		 3615 prefixlen_str = strchr(route_str, '/');
3616 if (!prefixlen_str) {
3617 log_link_debug(link, "Failed to parse route %s", route_str);
3618 continue;
3619 }
3620 *prefixlen_str++ = '\0';
f703cc2c 3621
1f68f772
ZJS		 3622 r = route_new(&tmp);
3623 if (r < 0)
3624 return log_oom();
f703cc2c 3625
1f68f772
ZJS		 3626 r = sscanf(prefixlen_str,
3627 "%hhu/%hhu/%"SCNu32"/%"PRIu32"/"USEC_FMT,
3628 &tmp->dst_prefixlen,
3629 &tmp->tos,
3630 &tmp->priority,
3631 &tmp->table,
3632 &tmp->lifetime);
3633 if (r != 5) {
3634 log_link_debug(link,
3635 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3636 prefixlen_str);
3637 continue;
3638 }
f1368755 3639
1f68f772
ZJS		 3640 r = in_addr_from_string_auto(route_str, &tmp->family, &tmp->dst);
3641 if (r < 0) {
3642 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
3643 continue;
3644 }
f703cc2c 3645
1f68f772
ZJS		 3646 r = route_add(link, tmp, &route);
3647 if (r < 0)
3648 return log_link_error_errno(link, r, "Failed to add route: %m");
f703cc2c 3649
1f68f772
ZJS		 3650 if (route->lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
3651 r = sd_event_add_time(link->manager->event, &expire,
3652 clock_boottime_or_monotonic(),
3653 route->lifetime, 0, route_expire_handler, route);
f703cc2c 3654 if (r < 0)
1f68f772 3655 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
f703cc2c 3656 }
1f68f772
ZJS		 3657
3658 sd_event_source_unref(route->expire);
3659 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3660 }
3661
0bc70f1d
TG		 3662 if (dhcp4_address) {
3663 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3664 if (r < 0) {
b68d26b8 3665 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3666 goto dhcp4_address_fail;
3667 }
3668
b1c626f6 3669 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3670 if (r < 0)
b68d26b8 3671 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d 3672
1b43e246
DS		 3673 r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0);
3674 if (r < 0)
3675 return log_link_error_errno(link, r, "Failed to attach DHCPv4 event: %m");
3676
0bc70f1d
TG		 3677 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3678 if (r < 0)
b68d26b8 3679 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3680 }
3681
3682dhcp4_address_fail:
3683
3684 if (ipv4ll_address) {
3685 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3686 if (r < 0) {
b68d26b8 3687 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3688 goto ipv4ll_address_fail;
3689 }
3690
3691 r = sd_ipv4ll_new(&link->ipv4ll);
3692 if (r < 0)
b68d26b8 3693 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d 3694
1b43e246
DS		 3695 r = sd_ipv4ll_attach_event(link->ipv4ll, NULL, 0);
3696 if (r < 0)
3697 return log_link_error_errno(link, r, "Failed to attach IPv4LL event: %m");
3698
0bc70f1d
TG		 3699 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3700 if (r < 0)
b68d26b8 3701 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3702 }
3703
3704ipv4ll_address_fail:
3705
c4a03a56
TG		 3706 return 0;
3707}
3708
1c4baffc 3709int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3710 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3711 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3712 Link *link;
5a937ea2 3713 int r;
505f8da7
TG		 3714
3715 assert(m);
fbbeb65a 3716 assert(m->rtnl);
505f8da7
TG		 3717 assert(message);
3718 assert(ret);
3719
3720 r = link_new(m, message, ret);
3721 if (r < 0)
3722 return r;
3723
3724 link = *ret;
3725
6a7a4e4d 3726 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3727
c4a03a56
TG		 3728 r = link_load(link);
3729 if (r < 0)
3730 return r;
3731
bf331d87
YW		 3732 if (path_is_read_only_fs("/sys") <= 0) {
3733 /* udev should be around */
ae06ab10 3734 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3735 r = sd_device_new_from_device_id(&device, ifindex_str);
3736 if (r < 0) {
4d59e14f
YW		 3737 log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m");
3738 return 0;
5c416fc4 3739 }
505f8da7 3740
5a937ea2 3741 r = sd_device_get_is_initialized(device);
51517f9e 3742 if (r < 0) {
bf331d87 3743 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 3744 goto failed;
3745 }
5a937ea2 3746 if (r == 0) {
505f8da7 3747 /* not yet ready */
79008bdd 3748 log_link_debug(link, "link pending udev initialization...");
505f8da7 3749 return 0;
3c4cb064 3750 }
505f8da7 3751
299ad32d
YW		 3752 r = device_is_renaming(device);
3753 if (r < 0) {
bf331d87 3754 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 3755 goto failed;
3756 }
3757 if (r > 0) {
bf331d87 3758 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 3759 return 0;
3760 }
3761
4f561e8e
TG		 3762 r = link_initialized(link, device);
3763 if (r < 0)
5c416fc4 3764 goto failed;
4f561e8e 3765 } else {
e6bf7774 3766 r = link_initialized_and_synced(link);
4f561e8e 3767 if (r < 0)
5c416fc4 3768 goto failed;
4f561e8e 3769 }
505f8da7 3770
a748b692 3771 return 0;
5c416fc4
TG		 3772failed:
3773 link_enter_failed(link);
3774 return r;
a748b692
TG		 3775}
3776
c601ebf7 3777int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3778 int r;
3779
3780 assert(link);
3781
3782 log_link_info(link, "Gained IPv6LL");
3783
c601ebf7 3784 link->ipv6ll_address = *address;
e7ab854c
TG		 3785 link_check_ready(link);
3786
b9ea3d2e 3787 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3788 r = link_acquire_ipv6_conf(link);
3789 if (r < 0) {
3790 link_enter_failed(link);
3791 return r;
3792 }
3793 }
3794
3795 return 0;
3796}
3797
9c0a72f9
TG		 3798static int link_carrier_gained(Link *link) {
3799 int r;
3800
3801 assert(link);
3802
0894cfe4 3803 r = wifi_get_info(link);
8d968fdd
YW		 3804 if (r < 0)
3805 return r;
3806 if (r > 0) {
572b21d9
YW		 3807 r = link_reconfigure_internal(link, NULL, false);
3808 if (r < 0) {
3809 link_enter_failed(link);
8d968fdd 3810 return r;
572b21d9 3811 }
8d968fdd
YW		 3812 }
3813
b9ea3d2e 3814 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3815 r = link_acquire_conf(link);
3816 if (r < 0) {
3817 link_enter_failed(link);
3818 return r;
3819 }
6fc25497 3820
b425c3ae 3821 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 3822 r = link_request_set_addresses(link);
6fc25497
SS		 3823 if (r < 0)
3824 return r;
9c0a72f9
TG		 3825 }
3826
0d4ad91d
AR		 3827 r = link_handle_bound_by_list(link);
3828 if (r < 0)
3829 return r;
3830
1f241589
YW		 3831 if (!link->bridge_mdb_configured) {
3832 r = link_set_bridge_mdb(link);
3833 if (r < 0)
3834 return r;
3835 }
3836
3837 if (streq_ptr(link->kind, "bridge")) {
3838 Link *slave;
3839
3840 SET_FOREACH(slave, link->slaves) {
3841 if (slave->bridge_mdb_configured)
3842 continue;
3843
3844 r = link_set_bridge_mdb(slave);
3845 if (r < 0)
3846 link_enter_failed(slave);
3847 }
3848 }
3db468ea 3849
9c0a72f9
TG		 3850 return 0;
3851}
3852
3853static int link_carrier_lost(Link *link) {
3854 int r;
3855
3856 assert(link);
3857
25e992ba 3858 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3859 return 0;
3860
fbdb6605 3861 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3862 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3863 * configuration and stop the clients as well. */
97e7fb39
SS		 3864 if (link->setting_mtu)
3865 return 0;
3866
95355a28 3867 r = link_stop_clients(link, false);
9c0a72f9
TG		 3868 if (r < 0) {
3869 link_enter_failed(link);
3870 return r;
3871 }
3872
28464ae0
SS		 3873 if (link_dhcp4_server_enabled(link))
3874 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3875
3104883d
SS		 3876 r = link_drop_config(link);
3877 if (r < 0)
3878 return r;
3879
2c7b826d 3880 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
f258e948 3881 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3882 r = link_drop_foreign_config(link);
3883 if (r < 0)
3884 return r;
3885 }
3104883d 3886
0d4ad91d
AR		 3887 r = link_handle_bound_by_list(link);
3888 if (r < 0)
3889 return r;
3890
9c0a72f9
TG		 3891 return 0;
3892}
3893
3894int link_carrier_reset(Link *link) {
3895 int r;
3896
3897 assert(link);
3898
3899 if (link_has_carrier(link)) {
3900 r = link_carrier_lost(link);
3901 if (r < 0)
3902 return r;
3903
3904 r = link_carrier_gained(link);
3905 if (r < 0)
3906 return r;
3907
6a7a4e4d 3908 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3909 }
3910
3911 return 0;
3912}
3913
d236718c
DS		 3914/* This is called every time an interface admin state changes to up;
3915 * specifically, when IFF_UP flag changes from unset to set */
3916static int link_admin_state_up(Link *link) {
3917 int r;
3918
3919 /* We set the ipv6 mtu after the device mtu, but the kernel resets
3920 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
3921 * ipv6_mtu_set prevents this from trying to set it too early before
3922 * the link->network has been setup; we only need to reset it
3923 * here if we've already set it during normal initialization. */
3924 if (link->ipv6_mtu_set) {
3925 r = link_set_ipv6_mtu(link);
3926 if (r < 0)
3927 return r;
3928 }
3929
3930 return 0;
3931}
3932
1c4baffc 3933int link_update(Link *link, sd_netlink_message *m) {
572b21d9 3934 _cleanup_strv_free_ char **s = NULL;
c49b33ac 3935 struct ether_addr mac;
ca4e095a 3936 const char *ifname;
afe7fd56 3937 uint32_t mtu;
d236718c 3938 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 3939 int old_master, r;
22936833 3940
dd3efc09 3941 assert(link);
b8941f74 3942 assert(link->ifname);
22936833
TG		 3943 assert(m);
3944
7619683b 3945 if (link->state == LINK_STATE_LINGER) {
5238e957 3946 log_link_info(link, "Link re-added");
289e6774 3947 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3948
3949 r = link_new_carrier_maps(link);
3950 if (r < 0)
3951 return r;
7619683b
TG		 3952 }
3953
1c4baffc 3954 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3955 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3956 Manager *manager = link->manager;
b8941f74 3957
30de2b89 3958 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3959
30de2b89
YW		 3960 link_drop(link);
3961 r = link_add(manager, m, &link);
3962 if (r < 0)
3963 return r;
b8941f74
TG		 3964 }
3965
572b21d9
YW		 3966 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3967 if (r >= 0)
3968 strv_free_and_replace(link->alternative_names, s);
3969
1c4baffc 3970 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3971 if (r >= 0 && mtu > 0) {
3972 link->mtu = mtu;
4e964aa0 3973 if (link->original_mtu == 0) {
afe7fd56 3974 link->original_mtu = mtu;
6a7a4e4d 3975 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3976 }
3977
3978 if (link->dhcp_client) {
3c9b8860
TG		 3979 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3980 link->mtu);
fc95c359
YW		 3981 if (r < 0)
3982 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3983 }
7465dd22
PF		 3984
3985 if (link->radv) {
3986 r = sd_radv_set_mtu(link->radv, link->mtu);
3987 if (r < 0)
3988 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3989 }
9842de0d 3990 }
69629de9 3991
e9189a1f
TG		 3992 /* The kernel may broadcast NEWLINK messages without the MAC address
3993 set, simply ignore them. */
1c4baffc 3994 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
807667f7
YW		 3995 if (r >= 0 && memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN) != 0) {
3996
3997 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN);
3998
3999 log_link_debug(link, "Gained new MAC address: "
4000 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
4001 mac.ether_addr_octet[0],
4002 mac.ether_addr_octet[1],
4003 mac.ether_addr_octet[2],
4004 mac.ether_addr_octet[3],
4005 mac.ether_addr_octet[4],
4006 mac.ether_addr_octet[5]);
4007
4008 if (link->ipv4ll) {
4009 bool restart = sd_ipv4ll_is_running(link->ipv4ll) > 0;
4010
4011 if (restart) {
4012 r = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 4013 if (r < 0)
807667f7 4014 return log_link_warning_errno(link, r, "Could not stop IPv4LL client: %m");
c49b33ac 4015 }
c49b33ac 4016
807667f7
YW		 4017 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
4018 if (r < 0)
4019 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
4020
4021 if (restart) {
4022 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d 4023 if (r < 0)
807667f7
YW		 4024 return log_link_warning_errno(link, r, "Could not restart IPv4LL client: %m");
4025 }
4026 }
4027
4028 if (link->dhcp_client) {
4029 r = sd_dhcp_client_set_mac(link->dhcp_client,
4030 (const uint8_t *) &link->mac,
4031 sizeof (link->mac),
4032 ARPHRD_ETHER);
4033 if (r < 0)
4034 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
4035
4036 r = dhcp4_set_client_identifier(link);
4037 if (r < 0)
4038 return log_link_warning_errno(link, r, "Could not set DHCP client identifier: %m");
4039 }
413708d1 4040
807667f7
YW		 4041 if (link->dhcp6_client) {
4042 const DUID* duid = link_get_duid(link);
4043 bool restart = sd_dhcp6_client_is_running(link->dhcp6_client) > 0;
4044
4045 if (restart) {
4046 r = sd_dhcp6_client_stop(link->dhcp6_client);
fff1f40c 4047 if (r < 0)
807667f7 4048 return log_link_warning_errno(link, r, "Could not stop DHCPv6 client: %m");
c49b33ac 4049 }
4138fb2c 4050
807667f7
YW		 4051 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
4052 (const uint8_t *) &link->mac,
4053 sizeof (link->mac),
4054 ARPHRD_ETHER);
4055 if (r < 0)
4056 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
8341a5c3 4057
807667f7
YW		 4058 if (link->network->iaid_set) {
4059 r = sd_dhcp6_client_set_iaid(link->dhcp6_client, link->network->iaid);
6a7a4e4d 4060 if (r < 0)
807667f7
YW		 4061 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
4062 }
4063
4064 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
4065 duid->type,
4066 duid->raw_data_len > 0 ? duid->raw_data : NULL,
4067 duid->raw_data_len);
4068 if (r < 0)
4069 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4070
4071 if (restart) {
4072 r = sd_dhcp6_client_start(link->dhcp6_client);
413708d1 4073 if (r < 0)
807667f7 4074 return log_link_warning_errno(link, r, "Could not restart DHCPv6 client: %m");
4138fb2c 4075 }
807667f7 4076 }
7465dd22 4077
807667f7
YW		 4078 if (link->radv) {
4079 bool restart = sd_radv_is_running(link->radv);
4080
4081 if (restart) {
4082 r = sd_radv_stop(link->radv);
7465dd22 4083 if (r < 0)
807667f7 4084 return log_link_warning_errno(link, r, "Could not stop Router Advertisement: %m");
7465dd22 4085 }
420d2058 4086
807667f7
YW		 4087 r = sd_radv_set_mac(link->radv, &link->mac);
4088 if (r < 0)
4089 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
4090
4091 if (restart) {
4092 r = sd_radv_start(link->radv);
420d2058 4093 if (r < 0)
807667f7 4094 return log_link_warning_errno(link, r, "Could not restart Router Advertisement: %m");
420d2058 4095 }
c49b33ac 4096 }
807667f7
YW		 4097
4098 if (link->ndisc) {
4099 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
4100 if (r < 0)
4101 return log_link_warning_errno(link, r, "Could not update MAC for NDisc: %m");
4102 }
4f882b2a
TG		 4103 }
4104
bb262ef0
YW		 4105 old_master = link->master_ifindex;
4106 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
4107
d236718c 4108 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 4109 had_carrier = link_has_carrier(link);
4110
bb262ef0 4111 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 4112 if (r < 0)
4113 return r;
4114
d236718c
DS		 4115 if (!link_was_admin_up && (link->flags & IFF_UP)) {
4116 log_link_info(link, "Link UP");
4117
4118 r = link_admin_state_up(link);
4119 if (r < 0)
4120 return r;
4121 } else if (link_was_admin_up && !(link->flags & IFF_UP))
4122 log_link_info(link, "Link DOWN");
4123
273eec24
LP		 4124 r = link_update_lldp(link);
4125 if (r < 0)
4126 return r;
4127
a61bb41c
TG		 4128 carrier_gained = !had_carrier && link_has_carrier(link);
4129 carrier_lost = had_carrier && !link_has_carrier(link);
4130
4131 if (carrier_gained) {
6a7a4e4d 4132 log_link_info(link, "Gained carrier");
a61bb41c 4133
9c0a72f9
TG		 4134 r = link_carrier_gained(link);
4135 if (r < 0)
4136 return r;
a61bb41c 4137 } else if (carrier_lost) {
6a7a4e4d 4138 log_link_info(link, "Lost carrier");
a61bb41c 4139
9c0a72f9
TG		 4140 r = link_carrier_lost(link);
4141 if (r < 0)
a61bb41c 4142 return r;
a61bb41c
TG		 4143 }
4144
4145 return 0;
dd3efc09 4146}
fe8db0c5 4147
b295beea
LP		 4148static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
4149 bool space = false;
b295beea
LP		 4150 Link *link;
4151
4152 assert(f);
4153 assert(prefix);
4154
4155 if (hashmap_isempty(h))
4156 return;
4157
0d536673 4158 fputs(prefix, f);
90e74a66 4159 HASHMAP_FOREACH(link, h) {
b295beea 4160 if (space)
0d536673 4161 fputc(' ', f);
b295beea
LP		 4162
4163 fprintf(f, "%i", link->ifindex);
4164 space = true;
4165 }
4166
0d536673 4167 fputc('\n', f);
b295beea
LP		 4168}
4169
64581765 4170static void link_save_dns(Link *link, FILE *f, struct in_addr_full **dns, unsigned n_dns, bool *space) {
dddc8d1e 4171 for (unsigned j = 0; j < n_dns; j++) {
e77bd3fd 4172 const char *str;
15761549 4173
64581765
YW		 4174 if (dns[j]->ifindex != 0 && dns[j]->ifindex != link->ifindex)
4175 continue;
4176
e77bd3fd
YW		 4177 str = in_addr_full_to_string(dns[j]);
4178 if (!str)
15761549 4179 continue;
15761549
YW		 4180
4181 if (*space)
4182 fputc(' ', f);
e77bd3fd 4183 fputs(str, f);
15761549
YW		 4184 *space = true;
4185 }
4186}
4187
d5e172d2
ZJS		 4188static void serialize_addresses(
4189 FILE *f,
4190 const char *lvalue,
4191 bool *space,
4192 char **addresses,
4193 sd_dhcp_lease *lease,
4194 bool conditional,
ddb82ec2 4195 sd_dhcp_lease_server_type what,
d5e172d2
ZJS		 4196 sd_dhcp6_lease *lease6,
4197 bool conditional6,
4198 int (*lease6_get_addr)(sd_dhcp6_lease*, const struct in6_addr**),
4199 int (*lease6_get_fqdn)(sd_dhcp6_lease*, char ***)) {
4200 int r;
4201
4202 bool _space = false;
4203 if (!space)
4204 space = &_space;
4205
4206 if (lvalue)
4207 fprintf(f, "%s=", lvalue);
4208 fputstrv(f, addresses, NULL, space);
4209
4210 if (lease && conditional) {
4211 const struct in_addr *lease_addresses;
4212
4213 r = sd_dhcp_lease_get_servers(lease, what, &lease_addresses);
4214 if (r > 0)
d8bff5cc 4215 serialize_in_addrs(f, lease_addresses, r, space, in4_addr_is_non_local);
d5e172d2
ZJS		 4216 }
4217
4218 if (lease6 && conditional6 && lease6_get_addr) {
4219 const struct in6_addr *in6_addrs;
4220
4221 r = lease6_get_addr(lease6, &in6_addrs);
d8bff5cc
ZJS		 4222 if (r > 0)
4223 serialize_in6_addrs(f, in6_addrs, r, space);
d5e172d2
ZJS		 4224 }
4225
4226 if (lease6 && conditional6 && lease6_get_fqdn) {
4227 char **in6_hosts;
4228
4229 r = lease6_get_fqdn(lease6, &in6_hosts);
4230 if (r > 0)
4231 fputstrv(f, in6_hosts, NULL, space);
4232 }
4233
4234 if (lvalue)
4235 fputc('\n', f);
4236}
4237
fe8db0c5 4238int link_save(Link *link) {
d361b373 4239 const char *admin_state, *oper_state, *carrier_state, *address_state;
68a8723c 4240 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 4241 _cleanup_fclose_ FILE *f = NULL;
c1eb9872 4242 Route *route;
18d8a2cf 4243 Address *a;
fe8db0c5
TG		 4244 int r;
4245
4246 assert(link);
4247 assert(link->state_file);
68a8723c 4248 assert(link->lease_file);
bbf7c048
TG		 4249 assert(link->manager);
4250
370e9930 4251 if (link->state == LINK_STATE_LINGER) {
6990fb6b 4252 (void) unlink(link->state_file);
370e9930
TG		 4253 return 0;
4254 }
4255
34437b4f
LP		 4256 link_lldp_save(link);
4257
deb2e523
TG		 4258 admin_state = link_state_to_string(link->state);
4259 assert(admin_state);
4260
e375dcde
TG		 4261 oper_state = link_operstate_to_string(link->operstate);
4262 assert(oper_state);
deb2e523 4263
ac999bf0
YW		 4264 carrier_state = link_carrier_state_to_string(link->carrier_state);
4265 assert(carrier_state);
4266
4267 address_state = link_address_state_to_string(link->address_state);
4268 assert(address_state);
4269
fe8db0c5
TG		 4270 r = fopen_temporary(link->state_file, &f, &temp_path);
4271 if (r < 0)
6a7a4e4d 4272 goto fail;
fe8db0c5 4273
5512a963 4274 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 4275
4276 fprintf(f,
4277 "# This is private data. Do not parse.\n"
deb2e523 4278 "ADMIN_STATE=%s\n"
ac999bf0
YW		 4279 "OPER_STATE=%s\n"
4280 "CARRIER_STATE=%s\n"
4281 "ADDRESS_STATE=%s\n",
4282 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 4283
bcb7a07e 4284 if (link->network) {
fe0e16db
YW		 4285 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
4286 const char *dhcp_domainname = NULL, *p;
fe0e16db 4287 bool space;
07bdc70d 4288
c1a38904
MTL		 4289 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
4290 yes_no(link->network->required_for_online));
4291
d5e172d2
ZJS		 4292 LinkOperationalStateRange st = link->network->required_operstate_for_online;
4293 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s%s%s\n",
4294 strempty(link_operstate_to_string(st.min)),
4295 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? ":" : "",
4296 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? strempty(link_operstate_to_string(st.max)) : "");
4ac77d63 4297
adc5b2e2
TG		 4298 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
4299
d5e172d2
ZJS		 4300 /************************************************************/
4301
0d536673 4302 fputs("DNS=", f);
ea352b40 4303 space = false;
15761549 4304 if (link->n_dns != (unsigned) -1)
64581765 4305 link_save_dns(link, f, link->dns, link->n_dns, &space);
15761549 4306 else
64581765 4307 link_save_dns(link, f, link->network->dns, link->network->n_dns, &space);
d5314fff 4308
d5e172d2
ZJS		 4309 serialize_addresses(f, NULL, &space,
4310 NULL,
4311 link->dhcp_lease,
4312 link->network->dhcp_use_dns,
ddb82ec2 4313 SD_DHCP_LEASE_DNS,
1633c457 4314 link->dhcp6_lease,
d5e172d2
ZJS		 4315 link->network->dhcp6_use_dns,
4316 sd_dhcp6_lease_get_dns,
4317 NULL);
1e7a0e21 4318
a8c10331 4319 /* Make sure to flush out old entries before we use the NDisc data */
1e7a0e21
LP		 4320 ndisc_vacuum(link);
4321
b296797f 4322 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 4323 NDiscRDNSS *dd;
4324
90e74a66 4325 SET_FOREACH(dd, link->ndisc_rdnss)
d8bff5cc 4326 serialize_in6_addrs(f, &dd->address, 1, &space);
299d578f
SS		 4327 }
4328
4329 fputc('\n', f);
4330
d5e172d2
ZJS		 4331 /************************************************************/
4332
4333 serialize_addresses(f, "NTP", NULL,
4334 link->ntp ?: link->network->ntp,
4335 link->dhcp_lease,
4336 link->network->dhcp_use_ntp,
ddb82ec2 4337 SD_DHCP_LEASE_NTP,
1633c457 4338 link->dhcp6_lease,
d5e172d2
ZJS		 4339 link->network->dhcp6_use_ntp,
4340 sd_dhcp6_lease_get_ntp_addrs,
4341 sd_dhcp6_lease_get_ntp_fqdn);
4342
4343 serialize_addresses(f, "SIP", NULL,
2a71d57f 4344 NULL,
d5e172d2
ZJS		 4345 link->dhcp_lease,
4346 link->network->dhcp_use_sip,
ddb82ec2 4347 SD_DHCP_LEASE_SIP,
2a71d57f 4348 NULL, false, NULL, NULL);
d5e172d2
ZJS		 4349
4350 /************************************************************/
bd8f6538 4351
b2a81c0b 4352 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 4353 if (link->dhcp_lease) {
b2a81c0b 4354 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 4355 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
4356 }
1633c457
YW		 4357 if (link->dhcp6_lease)
4358 (void) sd_dhcp6_lease_get_domains(link->dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 4359 }
4360
fe0e16db
YW		 4361 fputs("DOMAINS=", f);
4362 space = false;
90e74a66 4363 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains)
fe0e16db 4364 fputs_with_space(f, p, NULL, &space);
07bdc70d 4365
1e7a0e21 4366 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP		 4367 if (dhcp_domainname)
4368 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4369 if (dhcp_domains)
4370 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4371 if (dhcp6_domains)
4372 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 4373 }
4374
4375 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
4376 NDiscDNSSL *dd;
1e7a0e21 4377
90e74a66 4378 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 4379 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4380 }
b2a81c0b 4381
0d536673 4382 fputc('\n', f);
6192b846 4383
d5e172d2
ZJS		 4384 /************************************************************/
4385
fe0e16db
YW		 4386 fputs("ROUTE_DOMAINS=", f);
4387 space = false;
90e74a66 4388 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains)
fe0e16db 4389 fputs_with_space(f, p, NULL, &space);
b2a81c0b 4390
1e7a0e21 4391 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
1e7a0e21
LP		 4392 if (dhcp_domainname)
4393 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4394 if (dhcp_domains)
4395 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4396 if (dhcp6_domains)
4397 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 4398 }
4399
4400 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
4401 NDiscDNSSL *dd;
1e7a0e21 4402
90e74a66 4403 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 4404 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4405 }
b2a81c0b 4406
0d536673 4407 fputc('\n', f);
67272d15 4408
d5e172d2
ZJS		 4409 /************************************************************/
4410
3c9b8860 4411 fprintf(f, "LLMNR=%s\n",
15761549 4412 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
d5e172d2
ZJS		 4413
4414 /************************************************************/
4415
aaa297d4 4416 fprintf(f, "MDNS=%s\n",
15761549 4417 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
15761549 4418
d5e172d2
ZJS		 4419 /************************************************************/
4420
4421 int dns_default_route =
4422 link->dns_default_route >= 0 ? link->dns_default_route :
4423 link->network->dns_default_route;
4424 if (dns_default_route >= 0)
4425 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(dns_default_route));
4426
4427 /************************************************************/
4428
4429 DnsOverTlsMode dns_over_tls_mode =
4430 link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID ? link->dns_over_tls_mode :
4431 link->network->dns_over_tls_mode;
4432 if (dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
4433 fprintf(f, "DNS_OVER_TLS=%s\n", dns_over_tls_mode_to_string(dns_over_tls_mode));
4434
4435 /************************************************************/
4436
4437 DnssecMode dnssec_mode =
4438 link->dnssec_mode != _DNSSEC_MODE_INVALID ? link->dnssec_mode :
4439 link->network->dnssec_mode;
4440 if (dnssec_mode != _DNSSEC_MODE_INVALID)
4441 fprintf(f, "DNSSEC=%s\n", dnssec_mode_to_string(dnssec_mode));
4442
4443 /************************************************************/
4444
4445 Set *nta_anchors = link->dnssec_negative_trust_anchors;
4446 if (set_isempty(nta_anchors))
4447 nta_anchors = link->network->dnssec_negative_trust_anchors;
4448
4449 if (!set_isempty(nta_anchors)) {
8a516214
LP		 4450 const char *n;
4451
0d536673 4452 fputs("DNSSEC_NTA=", f);
8a516214 4453 space = false;
90e74a66 4454 SET_FOREACH(n, nta_anchors)
d390f8ef 4455 fputs_with_space(f, n, NULL, &space);
0d536673 4456 fputc('\n', f);
8a516214
LP		 4457 }
4458
d5e172d2
ZJS		 4459 /************************************************************/
4460
0d536673 4461 fputs("ADDRESSES=", f);
e7780c8d 4462 space = false;
90e74a66 4463 SET_FOREACH(a, link->addresses) {
e7780c8d
TG		 4464 _cleanup_free_ char *address_str = NULL;
4465
4466 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
4467 if (r < 0)
4468 goto fail;
4469
e7780c8d
TG		 4470 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
4471 space = true;
4472 }
0d536673 4473 fputc('\n', f);
c1eb9872 4474
d5e172d2
ZJS		 4475 /************************************************************/
4476
0d536673 4477 fputs("ROUTES=", f);
c1eb9872 4478 space = false;
90e74a66 4479 SET_FOREACH(route, link->routes) {
c1eb9872
TG		 4480 _cleanup_free_ char *route_str = NULL;
4481
4482 r = in_addr_to_string(route->family, &route->dst, &route_str);
4483 if (r < 0)
4484 goto fail;
4485
ecc3f340
ZJS		 4486 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
4487 space ? " " : "", route_str,
f833694d 4488 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 4489 space = true;
4490 }
4491
0d536673 4492 fputc('\n', f);
bcb7a07e 4493 }
7374f9d8 4494
b295beea
LP		 4495 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
4496 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 4497
8eb9058d 4498 if (link->dhcp_lease) {
bd91b83e 4499 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 4500 if (r < 0)
c2d6bd61 4501 goto fail;
fe8db0c5 4502
7374f9d8 4503 fprintf(f,
b0e39c82
TG		 4504 "DHCP_LEASE=%s\n",
4505 link->lease_file);
deb2e523 4506 } else
6990fb6b 4507 (void) unlink(link->lease_file);
fe8db0c5 4508
0bc70f1d
TG		 4509 if (link->ipv4ll) {
4510 struct in_addr address;
4511
4512 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
4513 if (r >= 0) {
0d536673 4514 fputs("IPV4LL_ADDRESS=", f);
072320ea 4515 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 4516 fputc('\n', f);
0bc70f1d
TG		 4517 }
4518 }
4519
7e738e7b
SS		 4520 if (link->dhcp6_client) {
4521 _cleanup_free_ char *duid = NULL;
4522 uint32_t iaid;
4523
4524 r = sd_dhcp6_client_get_iaid(link->dhcp6_client, &iaid);
4525 if (r >= 0)
4526 fprintf(f, "DHCP6_CLIENT_IAID=0x%x\n", iaid);
4527
4528 r = sd_dhcp6_client_duid_as_string(link->dhcp6_client, &duid);
4529 if (r >= 0)
4530 fprintf(f, "DHCP6_CLIENT_DUID=%s\n", duid);
4531 }
18d8a2cf 4532
c2d6bd61
LP		 4533 r = fflush_and_check(f);
4534 if (r < 0)
4535 goto fail;
fe8db0c5 4536
c2d6bd61 4537 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 4538 r = -errno;
c2d6bd61 4539 goto fail;
fe8db0c5
TG		 4540 }
4541
c2d6bd61 4542 return 0;
dacd6cee 4543
c2d6bd61 4544fail:
6a7a4e4d 4545 (void) unlink(link->state_file);
6a7a4e4d
LP		 4546 if (temp_path)
4547 (void) unlink(temp_path);
4548
dacd6cee 4549 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 4550}
4551
84de38c5
TG		 4552/* The serialized state in /run is no longer up-to-date. */
4553void link_dirty(Link *link) {
4554 int r;
4555
4556 assert(link);
4557
0c241a37
SS		 4558 /* mark manager dirty as link is dirty */
4559 manager_dirty(link->manager);
4560
de7fef4b 4561 r = set_ensure_put(&link->manager->dirty_links, NULL, link);
0c241a37 4562 if (r <= 0)
de7fef4b 4563 /* Ignore allocation errors and don't take another ref if the link was already dirty */
84de38c5 4564 return;
84de38c5
TG		 4565 link_ref(link);
4566}
4567
4568/* The serialized state in /run is up-to-date */
4569void link_clean(Link *link) {
4570 assert(link);
4571 assert(link->manager);
4572
1046bf9b 4573 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4574}
4575
c2a65950
YW		 4576int link_save_and_clean(Link *link) {
4577 int r;
4578
4579 r = link_save(link);
4580 if (r < 0)
4581 return r;
4582
4583 link_clean(link);
4584 return 0;
4585}
4586
fe8db0c5 4587static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4588 [LINK_STATE_PENDING] = "pending",
bd08ce56 4589 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 4590 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 4591 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4592 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4593 [LINK_STATE_FAILED] = "failed",
370e9930 4594 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4595};
4596
4597DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
5ecb131d
YW		 4598
4599int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg) {
4600 const char *err_msg = NULL;
4601
4602 (void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg);
d157714b
YW		 4603 return log_link_full_errno(link, level, err,
4604 "%s: %s%s%s%m",
4605 msg,
4606 strempty(err_msg),
4607 err_msg && !endswith(err_msg, ".") ? "." : "",
4608 err_msg ? " " : "");
5ecb131d 4609}
Unnamed repository; edit this file 'description' to name the repository.