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network: introduce address_exists() helper function
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
53e1b683 1/* SPDX-License-Identifier: LGPL-2.1+ */
f579559b 2
9aa5d8ba 3#include <netinet/in.h>
f579559b 4#include <linux/if.h>
8f815e8b 5#include <linux/if_arp.h>
518cd6b5 6#include <linux/if_link.h>
4cc7a82c 7#include <unistd.h>
f579559b 8
b5efdb8a 9#include "alloc-util.h"
737f1405
YW		 10#include "bond.h"
11#include "bridge.h"
1346b1f0 12#include "bus-util.h"
27dfc982 13#include "dhcp-identifier.h"
bd91b83e 14#include "dhcp-lease-internal.h"
686d13b9 15#include "env-file.h"
4bb7cc82 16#include "ethtool-util.h"
3ffd4af2 17#include "fd-util.h"
cf1d700d 18#include "fileio.h"
737f1405 19#include "ipvlan.h"
ef118d00 20#include "missing_network.h"
cf1d700d 21#include "netlink-util.h"
c6f7c917 22#include "network-internal.h"
3ddcbeea 23#include "networkd-can.h"
8fcf1d61 24#include "networkd-dhcp-server.h"
ca5ad760
YW		 25#include "networkd-dhcp4.h"
26#include "networkd-dhcp6.h"
27#include "networkd-ipv4ll.h"
a0e5c15d 28#include "networkd-ipv6-proxy-ndp.h"
6a1af3d4
YW		 29#include "networkd-link-bus.h"
30#include "networkd-link.h"
8e1ad1ea 31#include "networkd-lldp-tx.h"
23f53b99 32#include "networkd-manager.h"
1e7a0e21 33#include "networkd-ndisc.h"
e4a71bf3 34#include "networkd-neighbor.h"
518cd6b5 35#include "networkd-sriov.h"
7465dd22 36#include "networkd-radv.h"
bce67bbe 37#include "networkd-routing-policy-rule.h"
8d968fdd 38#include "networkd-wifi.h"
cf1d700d
TG		 39#include "set.h"
40#include "socket-util.h"
bf331d87 41#include "stat-util.h"
15a5e950 42#include "stdio-util.h"
8b43440b 43#include "string-table.h"
51517f9e 44#include "strv.h"
62e021a9 45#include "sysctl-util.h"
34658df2 46#include "tc.h"
e4de7287 47#include "tmpfile-util.h"
299ad32d 48#include "udev-util.h"
cf1d700d 49#include "util.h"
737f1405 50#include "vrf.h"
fc2f9534 51
bdb9f580
YW		 52uint32_t link_get_vrf_table(Link *link) {
53 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
54}
55
56uint32_t link_get_dhcp_route_table(Link *link) {
57 /* When the interface is part of an VRF use the VRFs routing table, unless
58 * another table is explicitly specified. */
59 if (link->network->dhcp_route_table_set)
60 return link->network->dhcp_route_table;
61 return link_get_vrf_table(link);
62}
63
64uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
65 if (link->network->ipv6_accept_ra_route_table_set)
66 return link->network->ipv6_accept_ra_route_table;
67 return link_get_vrf_table(link);
68}
69
f24648a6
YW		 70DUID* link_get_duid(Link *link) {
71 if (link->network->duid.type != _DUID_TYPE_INVALID)
72 return &link->network->duid;
73 else
74 return &link->manager->duid;
75}
76
b9d74c40
LP		 77static bool link_dhcp6_enabled(Link *link) {
78 assert(link);
79
fa709992
LP		 80 if (!socket_ipv6_is_supported())
81 return false;
82
78c958f8
TG		 83 if (link->flags & IFF_LOOPBACK)
84 return false;
85
86 if (!link->network)
87 return false;
88
f2bfcdb9
YW		 89 if (link->network->bond)
90 return false;
91
500b96eb 92 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 93 return false;
94
e0ee46f2 95 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 96}
97
b9d74c40
LP		 98static bool link_dhcp4_enabled(Link *link) {
99 assert(link);
100
78c958f8
TG		 101 if (link->flags & IFF_LOOPBACK)
102 return false;
103
104 if (!link->network)
105 return false;
106
f2bfcdb9
YW		 107 if (link->network->bond)
108 return false;
109
500b96eb 110 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 111 return false;
112
e0ee46f2 113 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 114}
115
b9d74c40
LP		 116static bool link_dhcp4_server_enabled(Link *link) {
117 assert(link);
118
78c958f8
TG		 119 if (link->flags & IFF_LOOPBACK)
120 return false;
121
122 if (!link->network)
123 return false;
124
f2bfcdb9
YW		 125 if (link->network->bond)
126 return false;
127
500b96eb 128 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 129 return false;
130
78c958f8
TG		 131 return link->network->dhcp_server;
132}
133
2d792895 134bool link_ipv4ll_enabled(Link *link, AddressFamily mask) {
b9d74c40 135 assert(link);
910feb78 136 assert((mask & ~(ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) == 0);
b9d74c40 137
78c958f8
TG		 138 if (link->flags & IFF_LOOPBACK)
139 return false;
140
141 if (!link->network)
142 return false;
143
500b96eb 144 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 145 return false;
146
98d20a17 147 if (STRPTR_IN_SET(link->kind,
148 "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
c6ac3729 149 "vti6", "nlmon", "xfrm"))
a8f5bba6
JD		 150 return false;
151
f410d463
YW		 152 /* L3 or L3S mode do not support ARP. */
153 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
154 return false;
155
f2bfcdb9
YW		 156 if (link->network->bond)
157 return false;
158
910feb78 159 return link->network->link_local & mask;
8bc17bb3
SS		 160}
161
b9d74c40
LP		 162static bool link_ipv6ll_enabled(Link *link) {
163 assert(link);
164
fa709992
LP		 165 if (!socket_ipv6_is_supported())
166 return false;
167
d0d6a4cd
TG		 168 if (link->flags & IFF_LOOPBACK)
169 return false;
170
171 if (!link->network)
172 return false;
173
500b96eb 174 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 175 return false;
176
177 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon"))
a8f5bba6
JD		 178 return false;
179
f2bfcdb9
YW		 180 if (link->network->bond)
181 return false;
182
e0ee46f2 183 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 184}
185
439689c6
SS		 186static bool link_ipv6_enabled(Link *link) {
187 assert(link);
188
189 if (!socket_ipv6_is_supported())
190 return false;
191
b102cdca 192 if (link->network->bond)
2b00a4e0
TY		 193 return false;
194
500b96eb 195 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 196 return false;
197
4cef7fe3 198 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
adfeee49
YW		 199 if (link_ipv6ll_enabled(link))
200 return true;
201
202 if (network_has_static_ipv6_configurations(link->network))
203 return true;
204
205 return false;
439689c6
SS		 206}
207
7465dd22
PF		 208static bool link_radv_enabled(Link *link) {
209 assert(link);
210
211 if (!link_ipv6ll_enabled(link))
212 return false;
213
55a7c78b 214 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 215}
216
769d324c 217static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 218 assert(link);
219
5a8bcb67
LP		 220 if (link->flags & IFF_LOOPBACK)
221 return false;
222
223 if (!link->network)
224 return false;
225
2d792895 226 if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
765afd5c
LP		 227 return false;
228
e0ee46f2 229 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 230}
231
232static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 233 assert(link);
765afd5c
LP		 234
235 if (!socket_ipv6_is_supported())
236 return false;
237
769d324c
LP		 238 if (link->flags & IFF_LOOPBACK)
239 return false;
240
241 if (!link->network)
242 return false;
243
2d792895 244 if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
765afd5c
LP		 245 return false;
246
e0ee46f2 247 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 248}
249
23d8b221
SS		 250static bool link_proxy_arp_enabled(Link *link) {
251 assert(link);
252
253 if (link->flags & IFF_LOOPBACK)
254 return false;
255
256 if (!link->network)
257 return false;
258
259 if (link->network->proxy_arp < 0)
260 return false;
261
262 return true;
263}
264
b9d74c40
LP		 265static bool link_ipv6_accept_ra_enabled(Link *link) {
266 assert(link);
267
fa709992
LP		 268 if (!socket_ipv6_is_supported())
269 return false;
270
f5a8c43f
TG		 271 if (link->flags & IFF_LOOPBACK)
272 return false;
273
274 if (!link->network)
275 return false;
276
702c979f
SS		 277 if (!link_ipv6ll_enabled(link))
278 return false;
279
f5a8c43f
TG		 280 /* If unset use system default (enabled if local forwarding is disabled.
281 * disabled if local forwarding is enabled).
282 * If set, ignore or enforce RA independent of local forwarding state.
283 */
284 if (link->network->ipv6_accept_ra < 0)
285 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
286 return !link_ipv6_forward_enabled(link);
287 else if (link->network->ipv6_accept_ra > 0)
288 /* accept RA even if ip_forward is enabled */
289 return true;
290 else
291 /* ignore RA */
292 return false;
293}
294
1f0d9695 295static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 296 assert(link);
d68e2e59
LP		 297
298 if (!socket_ipv6_is_supported())
299 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
300
49092e22 301 if (link->flags & IFF_LOOPBACK)
1f0d9695 302 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 303
304 if (!link->network)
1f0d9695 305 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 306
307 return link->network->ipv6_privacy_extensions;
308}
309
57ad7607 310static int link_update_ipv6_sysctl(Link *link) {
482efedc 311 bool enabled;
439689c6
SS		 312 int r;
313
314 if (link->flags & IFF_LOOPBACK)
315 return 0;
316
482efedc
SS		 317 enabled = link_ipv6_enabled(link);
318 if (enabled) {
319 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", false);
320 if (r < 0)
57ad7607
ZJS		 321 return log_link_warning_errno(link, r, "Cannot enable IPv6: %m");
322
323 log_link_info(link, "IPv6 successfully enabled");
482efedc 324 }
439689c6
SS		 325
326 return 0;
327}
328
34bf3c00
YW		 329static bool link_is_enslaved(Link *link) {
330 if (link->flags & IFF_SLAVE)
331 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
332 return true;
333
34bf3c00
YW		 334 if (!link->network)
335 return false;
336
bb262ef0 337 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 338 return true;
339
bb262ef0
YW		 340 /* TODO: add conditions for other netdevs. */
341
34bf3c00
YW		 342 return false;
343}
344
45e11abf
YW		 345static void link_update_master_operstate(Link *link, NetDev *netdev) {
346 Link *master;
347
348 if (!netdev)
349 return;
350
7936917e
YW		 351 if (netdev->ifindex <= 0)
352 return;
353
45e11abf
YW		 354 if (link_get(link->manager, netdev->ifindex, &master) < 0)
355 return;
356
357 link_update_operstate(master, true);
358}
359
360void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 361 LinkOperationalState operstate;
1678fbb3
YW		 362 LinkCarrierState carrier_state;
363 LinkAddressState address_state;
35c5a9ca 364 _cleanup_strv_free_ char **p = NULL;
1678fbb3 365 uint8_t scope = RT_SCOPE_NOWHERE;
35c5a9ca 366 bool changed = false;
1678fbb3 367 Address *address;
45e11abf 368 Iterator i;
14153d1b 369
84de38c5
TG		 370 assert(link);
371
372 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 373 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 374 else if (link_has_carrier(link)) {
1678fbb3
YW		 375 if (link_is_enslaved(link))
376 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 377 else
1678fbb3 378 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 379 } else if (link->flags & IFF_UP)
1678fbb3 380 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 381 else
1678fbb3 382 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 383
1678fbb3 384 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 385 Link *slave;
386
5f707e12 387 SET_FOREACH(slave, link->slaves, i) {
959f65d3 388 link_update_operstate(slave, false);
84de38c5 389
1678fbb3
YW		 390 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
391 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 392 }
959f65d3 393 }
84de38c5 394
1678fbb3
YW		 395 SET_FOREACH(address, link->addresses, i) {
396 if (!address_is_ready(address))
397 continue;
84de38c5 398
1678fbb3
YW		 399 if (address->scope < scope)
400 scope = address->scope;
401 }
84de38c5 402
1678fbb3
YW		 403 /* for operstate we also take foreign addresses into account */
404 SET_FOREACH(address, link->addresses_foreign, i) {
405 if (!address_is_ready(address))
406 continue;
407
408 if (address->scope < scope)
409 scope = address->scope;
410 }
411
412 if (scope < RT_SCOPE_SITE)
413 /* universally accessible addresses found */
414 address_state = LINK_ADDRESS_STATE_ROUTABLE;
415 else if (scope < RT_SCOPE_HOST)
416 /* only link or site local addresses found */
417 address_state = LINK_ADDRESS_STATE_DEGRADED;
84de38c5 418 else
1678fbb3
YW		 419 /* no useful addresses found */
420 address_state = LINK_ADDRESS_STATE_OFF;
421
422 /* Mapping of address and carrier state vs operational state
423 * carrier state
424 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
425 * ------------------------------------------------------------------------------
426 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
427 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
428 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
429 */
84de38c5 430
1678fbb3
YW		 431 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
432 operstate = (LinkOperationalState) carrier_state;
433 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
434 operstate = LINK_OPERSTATE_ROUTABLE;
435 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
436 operstate = LINK_OPERSTATE_DEGRADED;
437 else
14153d1b
YW		 438 operstate = LINK_OPERSTATE_ENSLAVED;
439
35c5a9ca
YW		 440 if (link->carrier_state != carrier_state) {
441 link->carrier_state = carrier_state;
442 changed = true;
443 if (strv_extend(&p, "CarrierState") < 0)
444 log_oom();
445 }
959f65d3 446
35c5a9ca
YW		 447 if (link->address_state != address_state) {
448 link->address_state = address_state;
449 changed = true;
450 if (strv_extend(&p, "AddressState") < 0)
451 log_oom();
959f65d3
YW		 452 }
453
84de38c5
TG		 454 if (link->operstate != operstate) {
455 link->operstate = operstate;
35c5a9ca
YW		 456 changed = true;
457 if (strv_extend(&p, "OperationalState") < 0)
458 log_oom();
84de38c5 459 }
959f65d3 460
35c5a9ca
YW		 461 if (p)
462 link_send_changed_strv(link, p);
463 if (changed)
464 link_dirty(link);
465
45e11abf
YW		 466 if (also_update_master && link->network) {
467 link_update_master_operstate(link, link->network->bond);
468 link_update_master_operstate(link, link->network->bridge);
959f65d3 469 }
84de38c5
TG		 470}
471
51d18171
TG		 472#define FLAG_STRING(string, flag, old, new) \
473 (((old ^ new) & flag) \
474 ? ((old & flag) ? (" -" string) : (" +" string)) \
475 : "")
476
bb262ef0 477static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 478 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
479 uint8_t operstate;
480 int r;
481
482 assert(link);
483
484 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 485 if (r < 0)
486 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 487
1c4baffc 488 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 489 if (r < 0)
490 /* if we got a message without operstate, take it to mean
491 the state was unchanged */
492 operstate = link->kernel_operstate;
493
bb262ef0 494 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 495 return 0;
496
497 if (link->flags != flags) {
6a7a4e4d 498 log_link_debug(link, "Flags change:%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
51d18171
TG		 499 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
500 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
501 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
502 FLAG_STRING("UP", IFF_UP, link->flags, flags),
503 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
504 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
505 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
506 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
507 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
508 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
509 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
510 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
511 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
512 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
513 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
514 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
515 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
516 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
517 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
518
519 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
520 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
521 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
522 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
523 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
524 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
525 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
526 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
527
528 /* link flags are currently at most 18 bits, let's align to
529 * printing 20 */
530 if (unknown_flags_added)
79008bdd 531 log_link_debug(link,
6a7a4e4d 532 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 533 unknown_flags_added);
534
535 if (unknown_flags_removed)
79008bdd 536 log_link_debug(link,
6a7a4e4d 537 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 538 unknown_flags_removed);
539 }
540
541 link->flags = flags;
542 link->kernel_operstate = operstate;
543
959f65d3 544 link_update_operstate(link, true);
51d18171
TG		 545
546 return 0;
547}
548
1c4baffc 549static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 550 _cleanup_(link_unrefp) Link *link = NULL;
6cad256d 551 const char *ifname, *kind = NULL;
b710e6b6 552 unsigned short iftype;
572b21d9
YW		 553 int r, ifindex;
554 uint16_t type;
f579559b 555
0c2f9b84 556 assert(manager);
505f8da7 557 assert(message);
f579559b
TG		 558 assert(ret);
559
6cad256d
TJ		 560 /* check for link kind */
561 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
562 if (r == 0) {
db2f8a2e 563 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 564 r = sd_netlink_message_exit_container(message);
565 if (r < 0)
566 return r;
567 }
568
1c4baffc 569 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 570 if (r < 0)
571 return r;
572 else if (type != RTM_NEWLINK)
573 return -EINVAL;
574
575 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
576 if (r < 0)
577 return r;
578 else if (ifindex <= 0)
579 return -EINVAL;
580
b710e6b6
LP		 581 r = sd_rtnl_message_link_get_type(message, &iftype);
582 if (r < 0)
583 return r;
584
1c4baffc 585 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 586 if (r < 0)
587 return r;
588
17f9c355 589 link = new(Link, 1);
f579559b
TG		 590 if (!link)
591 return -ENOMEM;
592
17f9c355
YW		 593 *link = (Link) {
594 .n_ref = 1,
595 .manager = manager,
596 .state = LINK_STATE_PENDING,
17f9c355
YW		 597 .ifindex = ifindex,
598 .iftype = iftype,
15761549
YW		 599
600 .n_dns = (unsigned) -1,
601 .dns_default_route = -1,
602 .llmnr = _RESOLVE_SUPPORT_INVALID,
603 .mdns = _RESOLVE_SUPPORT_INVALID,
604 .dnssec_mode = _DNSSEC_MODE_INVALID,
605 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
17f9c355
YW		 606 };
607
505f8da7
TG		 608 link->ifname = strdup(ifname);
609 if (!link->ifname)
610 return -ENOMEM;
f579559b 611
6cad256d
TJ		 612 if (kind) {
613 link->kind = strdup(kind);
614 if (!link->kind)
615 return -ENOMEM;
616 }
617
cbff7170
TJ		 618 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
619 if (r < 0)
620 log_link_debug_errno(link, r, "New device has no master, continuing without");
621
1c4baffc 622 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 623 if (r < 0)
34437b4f 624 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 625
c643bda5 626 r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac);
4bb7cc82
YW		 627 if (r < 0)
628 log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
629
c643bda5
YW		 630 r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver);
631 if (r < 0)
632 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
633
572b21d9
YW		 634 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &link->alternative_names);
635 if (r < 0 && r != -ENODATA)
636 return r;
637
34437b4f 638 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 639 return -ENOMEM;
fe8db0c5 640
34437b4f 641 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 642 return -ENOMEM;
643
34437b4f 644 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 645 return -ENOMEM;
646
d5099efc 647 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 648 if (r < 0)
649 return r;
650
651 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 652 if (r < 0)
653 return r;
654
bb262ef0 655 r = link_update_flags(link, message, false);
51d18171
TG		 656 if (r < 0)
657 return r;
658
1cc6c93a 659 *ret = TAKE_PTR(link);
f579559b
TG		 660
661 return 0;
662}
663
15761549
YW		 664void link_ntp_settings_clear(Link *link) {
665 link->ntp = strv_free(link->ntp);
666}
667
668void link_dns_settings_clear(Link *link) {
669 link->dns = mfree(link->dns);
670 link->n_dns = (unsigned) -1;
671
672 link->search_domains = ordered_set_free_free(link->search_domains);
673 link->route_domains = ordered_set_free_free(link->route_domains);
674
675 link->dns_default_route = -1;
676 link->llmnr = _RESOLVE_SUPPORT_INVALID;
677 link->mdns = _RESOLVE_SUPPORT_INVALID;
678 link->dnssec_mode = _DNSSEC_MODE_INVALID;
679 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
680
681 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
682}
683
1a6bb31f
YW		 684static void link_free_engines(Link *link) {
685 if (!link)
686 return;
687
688 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
689 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
690 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
691 link->dhcp_routes = set_free(link->dhcp_routes);
692
693 link->lldp = sd_lldp_unref(link->lldp);
694
695 ndisc_flush(link);
696
697 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
698 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
699 link->ndisc = sd_ndisc_unref(link->ndisc);
700 link->radv = sd_radv_unref(link->radv);
701}
702
8301aa0b 703static Link *link_free(Link *link) {
428fd0a7
TG		 704 Address *address;
705
8301aa0b 706 assert(link);
f579559b 707
15761549
YW		 708 link_ntp_settings_clear(link);
709 link_dns_settings_clear(link);
710
f535e354
YW		 711 link->routes = set_free_with_destructor(link->routes, route_free);
712 link->routes_foreign = set_free_with_destructor(link->routes_foreign, route_free);
adda1ed9 713
c16c7808
SS		 714 link->nexthops = set_free_with_destructor(link->nexthops, nexthop_free);
715 link->nexthops_foreign = set_free_with_destructor(link->nexthops_foreign, nexthop_free);
716
d1bdafd2
WKI		 717 link->neighbors = set_free_with_destructor(link->neighbors, neighbor_free);
718 link->neighbors_foreign = set_free_with_destructor(link->neighbors_foreign, neighbor_free);
719
f535e354
YW		 720 link->addresses = set_free_with_destructor(link->addresses, address_free);
721 link->addresses_foreign = set_free_with_destructor(link->addresses_foreign, address_free);
adda1ed9 722
11bf3cce
LP		 723 while ((address = link->pool_addresses)) {
724 LIST_REMOVE(addresses, link->pool_addresses, address);
725 address_free(address);
726 }
727
7272b25e 728 link_lldp_emit_stop(link);
1a6bb31f 729 link_free_engines(link);
68a8723c 730 free(link->lease_file);
49699bac
SS		 731 free(link->lldp_file);
732
c166a070 733 free(link->ifname);
572b21d9 734 strv_free(link->alternative_names);
ceac4078 735 free(link->kind);
8d968fdd 736 free(link->ssid);
c643bda5 737 free(link->driver);
6cad256d 738
db2f8a2e 739 (void) unlink(link->state_file);
fe8db0c5 740 free(link->state_file);
c166a070 741
51517f9e 742 sd_device_unref(link->sd_device);
b5db00e5 743
0d4ad91d 744 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 745 hashmap_free(link->bound_by_links);
746
5f707e12 747 set_free_with_destructor(link->slaves, link_unref);
033295c1 748
c9c908a6
YW		 749 network_unref(link->network);
750
8301aa0b 751 return mfree(link);
14b746f7
TG		 752}
753
8301aa0b 754DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 755
11a7f229
TG		 756int link_get(Manager *m, int ifindex, Link **ret) {
757 Link *link;
11a7f229
TG		 758
759 assert(m);
e856ed00 760 assert(ifindex > 0);
11a7f229
TG		 761 assert(ret);
762
ae06ab10 763 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 764 if (!link)
765 return -ENODEV;
766
767 *ret = link;
768
769 return 0;
770}
771
af9ba57a 772void link_set_state(Link *link, LinkState state) {
e331e246
TG		 773 assert(link);
774
775 if (link->state == state)
776 return;
777
0beb9542
YW		 778 log_link_debug(link, "State changed: %s -> %s",
779 link_state_to_string(link->state),
780 link_state_to_string(state));
781
e331e246
TG		 782 link->state = state;
783
784 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 785}
786
57bd6899
TG		 787static void link_enter_unmanaged(Link *link) {
788 assert(link);
789
e331e246 790 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 791
84de38c5 792 link_dirty(link);
57bd6899
TG		 793}
794
95355a28 795int link_stop_clients(Link *link, bool may_keep_dhcp) {
111bb8f9 796 int r = 0, k;
051e77ca 797 Address *ad;
111bb8f9
TG		 798
799 assert(link);
800 assert(link->manager);
801 assert(link->manager->event);
802
80060352
ZJS		 803 bool keep_dhcp = may_keep_dhcp &&
804 link->network &&
805 (link->manager->restarting ||
806 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
807
808 if (link->dhcp_client && !keep_dhcp) {
111bb8f9 809 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 810 if (k < 0)
36c7d709 811 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 812 }
813
ba179154 814 if (link->ipv4ll) {
111bb8f9 815 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 816 if (k < 0)
36c7d709 817 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 818 }
819
051e77ca
SS		 820 if (link->network)
821 LIST_FOREACH(addresses, ad, link->network->static_addresses)
822 if (ad->acd && sd_ipv4acd_is_running(ad->acd) == 0) {
823 k = sd_ipv4acd_stop(ad->acd);
824 if (k < 0)
825 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
826 }
827
f5a8c43f
TG		 828 if (link->dhcp6_client) {
829 k = sd_dhcp6_client_stop(link->dhcp6_client);
830 if (k < 0)
36c7d709 831 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 832 }
4138fb2c 833
1e7a0e21
LP		 834 if (link->ndisc) {
835 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 836 if (k < 0)
36c7d709 837 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 838 }
839
7465dd22 840 if (link->radv) {
290696e5 841 k = sd_radv_stop(link->radv);
7465dd22
PF		 842 if (k < 0)
843 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
844 }
845
7272b25e 846 link_lldp_emit_stop(link);
111bb8f9
TG		 847 return r;
848}
849
b22d8a00 850void link_enter_failed(Link *link) {
ef1ba606 851 assert(link);
f882c247 852
370e9930 853 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 854 return;
855
6a7a4e4d 856 log_link_warning(link, "Failed");
449f7554 857
e331e246 858 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 859
95355a28 860 link_stop_clients(link, false);
111bb8f9 861
84de38c5 862 link_dirty(link);
f882c247
TG		 863}
864
7033af49
YW		 865static int link_join_netdevs_after_configured(Link *link) {
866 NetDev *netdev;
867 Iterator i;
868 int r;
869
870 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
871 if (netdev->ifindex > 0)
872 /* Assume already enslaved. */
873 continue;
874
875 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
876 continue;
877
878 log_struct(LOG_DEBUG,
879 LOG_LINK_INTERFACE(link),
880 LOG_NETDEV_INTERFACE(netdev),
881 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
882
883 r = netdev_join(netdev, link, NULL);
884 if (r < 0)
885 return log_struct_errno(LOG_WARNING, r,
886 LOG_LINK_INTERFACE(link),
887 LOG_NETDEV_INTERFACE(netdev),
888 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
889 }
890
891 return 0;
892}
893
e3a7b048 894static void link_enter_configured(Link *link) {
dd43110f
TG		 895 assert(link);
896 assert(link->network);
e3a7b048 897
289e6774 898 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 899 return;
dd43110f 900
e331e246 901 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 902
7033af49
YW		 903 (void) link_join_netdevs_after_configured(link);
904
84de38c5 905 link_dirty(link);
dd43110f
TG		 906}
907
47079967 908static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 909 RoutingPolicyRule *rule, *rrule = NULL;
910 int r;
911
912 assert(link);
913 assert(link->network);
914
2428613f
YW		 915 link->routing_policy_rules_configured = false;
916
8a9b3a23 917 LIST_FOREACH(rules, rule, link->network->rules) {
b80a511b 918 r = routing_policy_rule_get(link->manager, rule, &rrule);
ff14e2eb
YW		 919 if (r >= 0) {
920 if (r == 0)
921 (void) routing_policy_rule_make_local(link->manager, rrule);
8a9b3a23
SS		 922 continue;
923 }
924
9f08a578 925 r = routing_policy_rule_configure(rule, link, NULL);
4ff296b0
YW		 926 if (r < 0)
927 return log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
7ef7e550
YW		 928 if (r > 0)
929 link->routing_policy_rule_messages++;
8a9b3a23
SS		 930 }
931
932 routing_policy_rule_purge(link->manager, link);
5d976f5f 933 if (link->routing_policy_rule_messages == 0)
7715629e 934 link->routing_policy_rules_configured = true;
5d976f5f 935 else {
7715629e 936 log_link_debug(link, "Setting routing policy rules");
b425c3ae
YW		 937 link_set_state(link, LINK_STATE_CONFIGURING);
938 }
8a9b3a23
SS		 939
940 return 0;
941}
942
c16c7808
SS		 943static int nexthop_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
944 int r;
945
946 assert(link);
947 assert(link->nexthop_messages > 0);
948 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
949 LINK_STATE_FAILED, LINK_STATE_LINGER));
950
951 link->nexthop_messages--;
952
953 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
954 return 1;
955
956 r = sd_netlink_message_get_errno(m);
957 if (r < 0 && r != -EEXIST) {
5ecb131d 958 log_link_message_warning_errno(link, m, r, "Could not set nexthop");
c16c7808
SS		 959 link_enter_failed(link);
960 return 1;
961 }
962
963 if (link->nexthop_messages == 0) {
964 log_link_debug(link, "Nexthop set");
965 link->static_nexthops_configured = true;
966 link_check_ready(link);
967 }
968
969 return 1;
970}
971
eb01a2df 972static int link_request_set_nexthop(Link *link) {
c16c7808
SS		 973 NextHop *nh;
974 int r;
975
0c816fcc
YW		 976 link->static_nexthops_configured = false;
977
c16c7808
SS		 978 LIST_FOREACH(nexthops, nh, link->network->static_nexthops) {
979 r = nexthop_configure(nh, link, nexthop_handler);
980 if (r < 0)
981 return log_link_warning_errno(link, r, "Could not set nexthop: %m");
982 if (r > 0)
983 link->nexthop_messages++;
984 }
985
986 if (link->nexthop_messages == 0) {
987 link->static_nexthops_configured = true;
988 link_check_ready(link);
989 } else {
990 log_link_debug(link, "Setting nexthop");
991 link_set_state(link, LINK_STATE_CONFIGURING);
992 }
993
994 return 1;
995}
996
302a796f 997static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 998 int r;
999
1046bf9b 1000 assert(link);
7715629e 1001 assert(link->route_messages > 0);
289e6774
WKI		 1002 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
1003 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1004
7715629e 1005 link->route_messages--;
f882c247 1006
77a008c0 1007 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1008 return 1;
1009
1c4baffc 1010 r = sd_netlink_message_get_errno(m);
4ff296b0 1011 if (r < 0 && r != -EEXIST) {
5ecb131d 1012 log_link_message_warning_errno(link, m, r, "Could not set route");
4ff296b0
YW		 1013 link_enter_failed(link);
1014 return 1;
1015 }
f882c247 1016
7715629e 1017 if (link->route_messages == 0) {
6a7a4e4d 1018 log_link_debug(link, "Routes set");
7715629e 1019 link->static_routes_configured = true;
0c816fcc 1020 link_request_set_nexthop(link);
dd3efc09 1021 }
f882c247
TG		 1022
1023 return 1;
1024}
1025
b5799eeb 1026int link_request_set_routes(Link *link) {
bf61b05a
LP		 1027 enum {
1028 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
1029 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
1030 _PHASE_MAX
1031 } phase;
a6cc569e 1032 Route *rt;
f882c247
TG		 1033 int r;
1034
1035 assert(link);
1036 assert(link->network);
c42ff3a1
WKI		 1037 assert(link->addresses_configured);
1038 assert(link->address_messages == 0);
289e6774 1039 assert(link->state != _LINK_STATE_INVALID);
f882c247 1040
2428613f 1041 link->static_routes_configured = false;
27c34f73 1042
4e2ef9d9
YW		 1043 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
1044 /* During configuring addresses, the link lost its carrier. As networkd is dropping
1045 * the addresses now, let's not configure the routes either. */
1046 return 0;
1047
47079967 1048 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 1049 if (r < 0)
1050 return r;
f882c247 1051
bf61b05a
LP		 1052 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
1053 for (phase = 0; phase < _PHASE_MAX; phase++)
1054 LIST_FOREACH(routes, rt, link->network->static_routes) {
1985c54f
YW		 1055 if (rt->gateway_from_dhcp)
1056 continue;
0d34228f 1057
6ff5cc6b 1058 if ((in_addr_is_null(rt->family, &rt->gw) && ordered_set_isempty(rt->multipath_routes)) != (phase == PHASE_NON_GATEWAY))
bf61b05a 1059 continue;
a6cc569e 1060
0d34228f 1061 r = route_configure(rt, link, route_handler);
4ff296b0
YW		 1062 if (r < 0)
1063 return log_link_warning_errno(link, r, "Could not set routes: %m");
c4423317
YW		 1064 if (r > 0)
1065 link->route_messages++;
0d34228f 1066 }
f5be5601 1067
7715629e
ST		 1068 if (link->route_messages == 0) {
1069 link->static_routes_configured = true;
0c816fcc 1070 link_request_set_nexthop(link);
b425c3ae 1071 } else {
6a7a4e4d 1072 log_link_debug(link, "Setting routes");
b425c3ae
YW		 1073 link_set_state(link, LINK_STATE_CONFIGURING);
1074 }
f882c247
TG		 1075
1076 return 0;
1077}
1078
6accfd31
DA		 1079void link_check_ready(Link *link) {
1080 Address *a;
1081 Iterator i;
4ff296b0 1082 int r;
6accfd31
DA		 1083
1084 assert(link);
1085
39373cb9
YW		 1086 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) {
1087 log_link_debug(link, "%s(): link is in failed or linger state.", __func__);
6accfd31 1088 return;
39373cb9 1089 }
6accfd31
DA		 1090
1091 if (!link->network)
1092 return;
1093
39373cb9
YW		 1094 if (!link->addresses_configured) {
1095 log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 1096 return;
39373cb9 1097 }
6accfd31 1098
39373cb9
YW		 1099 if (!link->neighbors_configured) {
1100 log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
6accfd31 1101 return;
39373cb9 1102 }
6accfd31 1103
6aa5773b 1104 SET_FOREACH(a, link->addresses, i)
39373cb9
YW		 1105 if (!address_is_ready(a)) {
1106 _cleanup_free_ char *str = NULL;
1107
1108 (void) in_addr_to_string(a->family, &a->in_addr, &str);
1109 log_link_debug(link, "%s(): an address %s/%d is not ready.", __func__, strnull(str), a->prefixlen);
6aa5773b 1110 return;
39373cb9 1111 }
6aa5773b
DA		 1112
1113 if (!link->addresses_ready) {
1114 link->addresses_ready = true;
4ff296b0
YW		 1115 r = link_request_set_routes(link);
1116 if (r < 0)
1117 link_enter_failed(link);
39373cb9 1118 log_link_debug(link, "%s(): static addresses are configured. Configuring static routes.", __func__);
710ce9e5 1119 return;
6aa5773b
DA		 1120 }
1121
39373cb9
YW		 1122 if (!link->static_routes_configured) {
1123 log_link_debug(link, "%s(): static routes are not configured.", __func__);
6accfd31 1124 return;
39373cb9 1125 }
6accfd31 1126
39373cb9
YW		 1127 if (!link->static_nexthops_configured) {
1128 log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 1129 return;
39373cb9 1130 }
c16c7808 1131
39373cb9
YW		 1132 if (!link->routing_policy_rules_configured) {
1133 log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 1134 return;
39373cb9 1135 }
6accfd31 1136
39373cb9
YW		 1137 if (!link->tc_configured) {
1138 log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
4ecdcb07 1139 return;
39373cb9 1140 }
4ecdcb07 1141
39373cb9
YW		 1142 if (!link->sr_iov_configured) {
1143 log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 1144 return;
39373cb9 1145 }
518cd6b5 1146
463797c1 1147 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
6accfd31 1148
39373cb9
YW		 1149 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !link->ipv4ll_address) {
1150 log_link_debug(link, "%s(): IPv4LL is not configured.", __func__);
463797c1 1151 return;
39373cb9 1152 }
6accfd31 1153
463797c1 1154 if (link_ipv6ll_enabled(link) &&
39373cb9
YW		 1155 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
1156 log_link_debug(link, "%s(): IPv6LL is not configured.", __func__);
463797c1 1157 return;
39373cb9 1158 }
6accfd31 1159
659ad3a0
YW		 1160 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) && set_isempty(link->addresses)) {
1161 log_link_debug(link, "%s(): DHCP4 or DHCP6 is enabled but no address is assigned yet.", __func__);
1162 return;
1163 }
1164
39373cb9
YW		 1165 if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || dhcp6_get_prefix_delegation(link) || link_ipv6_accept_ra_enabled(link)) {
1166 if (!link->dhcp4_configured &&
1167 !(link->dhcp6_address_configured && link->dhcp6_route_configured) &&
1168 !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) &&
d98c546d 1169 !(link->ndisc_addresses_configured && link->ndisc_routes_configured) &&
39373cb9
YW		 1170 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address)) {
1171 /* When DHCP or RA is enabled, at least one protocol must provide an address, or
1172 * an IPv4ll fallback address must be configured. */
1173 log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
1174 return;
1175 }
1176
d98c546d 1177 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		 1178 __func__,
1179 yes_no(link->dhcp4_configured),
1180 yes_no(link->dhcp6_address_configured),
1181 yes_no(link->dhcp6_route_configured),
1182 yes_no(link->dhcp6_pd_address_configured),
1183 yes_no(link->dhcp6_pd_route_configured),
d98c546d
YW		 1184 yes_no(link->ndisc_addresses_configured),
1185 yes_no(link->ndisc_routes_configured));
39373cb9 1186 }
463797c1 1187 }
6accfd31 1188
6accfd31
DA		 1189 if (link->state != LINK_STATE_CONFIGURED)
1190 link_enter_configured(link);
1191
1192 return;
1193}
1194
e4a71bf3
WKI		 1195static int link_request_set_neighbors(Link *link) {
1196 Neighbor *neighbor;
1197 int r;
1198
1199 assert(link);
1200 assert(link->network);
1201 assert(link->state != _LINK_STATE_INVALID);
1202
2428613f 1203 link->neighbors_configured = false;
e4a71bf3
WKI		 1204
1205 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
1206 r = neighbor_configure(neighbor, link, NULL);
4ff296b0
YW		 1207 if (r < 0)
1208 return log_link_warning_errno(link, r, "Could not set neighbor: %m");
e4a71bf3
WKI		 1209 }
1210
1211 if (link->neighbor_messages == 0) {
1212 link->neighbors_configured = true;
1213 link_check_ready(link);
b425c3ae 1214 } else {
e4a71bf3 1215 log_link_debug(link, "Setting neighbors");
b425c3ae
YW		 1216 link_set_state(link, LINK_STATE_CONFIGURING);
1217 }
e4a71bf3
WKI		 1218
1219 return 0;
1220}
1221
3650173f 1222static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1223 int r;
1224
4958aee4 1225 assert(rtnl);
f5be5601
TG		 1226 assert(m);
1227 assert(link);
1228 assert(link->ifname);
7715629e 1229 assert(link->address_messages > 0);
289e6774 1230 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1231 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1232
7715629e 1233 link->address_messages--;
f882c247 1234
5da8149f 1235 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1236 return 1;
1237
1c4baffc 1238 r = sd_netlink_message_get_errno(m);
4ff296b0 1239 if (r < 0 && r != -EEXIST) {
5ecb131d 1240 log_link_message_warning_errno(link, m, r, "Could not set address");
4ff296b0
YW		 1241 link_enter_failed(link);
1242 return 1;
1243 } else if (r >= 0)
1244 (void) manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1245
7715629e 1246 if (link->address_messages == 0) {
6a7a4e4d 1247 log_link_debug(link, "Addresses set");
c42ff3a1 1248 link->addresses_configured = true;
6aa5773b 1249 link_check_ready(link);
dd3efc09 1250 }
f882c247
TG		 1251
1252 return 1;
1253}
1254
f6bb7ac5
TJ		 1255static int link_set_bridge_fdb(Link *link) {
1256 FdbEntry *fdb_entry;
197e2809 1257 int r;
f6bb7ac5
TJ		 1258
1259 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1260 r = fdb_entry_configure(link, fdb_entry);
197e2809 1261 if (r < 0)
f6bb7ac5 1262 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1263 }
1264
197e2809 1265 return 0;
f6bb7ac5
TJ		 1266}
1267
289e6774 1268static int link_request_set_addresses(Link *link) {
95b74ef6 1269 AddressLabel *label;
a6cc569e 1270 Address *ad;
bd6379ec 1271 Prefix *p;
f882c247
TG		 1272 int r;
1273
1274 assert(link);
1275 assert(link->network);
f5be5601 1276 assert(link->state != _LINK_STATE_INVALID);
f882c247 1277
2428613f
YW		 1278 /* Reset all *_configured flags we are configuring. */
1279 link->addresses_configured = false;
6aa5773b 1280 link->addresses_ready = false;
2428613f
YW		 1281 link->neighbors_configured = false;
1282 link->static_routes_configured = false;
c16c7808 1283 link->static_nexthops_configured = false;
2428613f
YW		 1284 link->routing_policy_rules_configured = false;
1285
f6bb7ac5
TJ		 1286 r = link_set_bridge_fdb(link);
1287 if (r < 0)
1288 return r;
1289
f3ef324d
YW		 1290 r = link_request_set_neighbors(link);
1291 if (r < 0)
1292 return r;
e4a71bf3 1293
3d3d4255 1294 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1295 bool update;
1296
1297 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1298
1299 r = address_configure(ad, link, address_handler, update);
4ff296b0
YW		 1300 if (r < 0)
1301 return log_link_warning_errno(link, r, "Could not set addresses: %m");
54a1a535
YW		 1302 if (r > 0)
1303 link->address_messages++;
95b74ef6
SS		 1304 }
1305
bd6379ec
SS		 1306 if (IN_SET(link->network->router_prefix_delegation,
1307 RADV_PREFIX_DELEGATION_STATIC,
1308 RADV_PREFIX_DELEGATION_BOTH))
1309 LIST_FOREACH(prefixes, p, link->network->static_prefixes) {
1310 _cleanup_(address_freep) Address *address = NULL;
1311
1312 if (!p->assign)
1313 continue;
1314
1315 r = address_new(&address);
1316 if (r < 0)
1317 return log_link_error_errno(link, r, "Could not allocate address: %m");
1318
1319 r = sd_radv_prefix_get_prefix(p->radv_prefix, &address->in_addr.in6, &address->prefixlen);
1320 if (r < 0)
1321 return r;
1322
1323 r = generate_ipv6_eui_64_address(link, &address->in_addr.in6);
1324 if (r < 0)
1325 return r;
1326
1327 address->family = AF_INET6;
1328 r = address_configure(address, link, address_handler, true);
1329 if (r < 0)
1330 return log_link_warning_errno(link, r, "Could not set addresses: %m");
1331 if (r > 0)
1332 link->address_messages++;
1333 }
1334
95b74ef6 1335 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1336 r = address_label_configure(label, link, NULL, false);
4ff296b0
YW		 1337 if (r < 0)
1338 return log_link_warning_errno(link, r, "Could not set address label: %m");
f5be5601 1339
7715629e 1340 link->address_label_messages++;
f882c247
TG		 1341 }
1342
d4cdbea5
TG		 1343 /* now that we can figure out a default address for the dhcp server,
1344 start it */
708c425d 1345 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
8fcf1d61 1346 r = dhcp4_server_configure(link);
4ff296b0 1347 if (r < 0)
d4cdbea5 1348 return r;
6a7a4e4d 1349 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1350 }
1351
c42ff3a1
WKI		 1352 if (link->address_messages == 0) {
1353 link->addresses_configured = true;
6aa5773b 1354 link_check_ready(link);
b425c3ae 1355 } else {
6a7a4e4d 1356 log_link_debug(link, "Setting addresses");
b425c3ae
YW		 1357 link_set_state(link, LINK_STATE_CONFIGURING);
1358 }
431ca2ce 1359
f882c247
TG		 1360 return 0;
1361}
1362
13b498f9 1363static int link_set_bridge_vlan(Link *link) {
86e2be7b 1364 int r;
13b498f9
TJ		 1365
1366 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1367 if (r < 0)
1368 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1369
1370 return r;
1371}
1372
a60a720c 1373static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1374 int r;
1375
1376 if (!link_proxy_arp_enabled(link))
1377 return 0;
1378
62e021a9 1379 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1380 if (r < 0)
1381 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1382
1383 return 0;
1384}
1385
3a390124 1386static int link_configure_continue(Link *link);
55dc8c4a 1387
302a796f 1388static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1389 int r;
1390
1391 assert(m);
1392 assert(link);
1393 assert(link->ifname);
1394
55dc8c4a
YW		 1395 link->setting_mtu = false;
1396
5da8149f 1397 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1398 return 1;
1399
1c4baffc 1400 r = sd_netlink_message_get_errno(m);
4ff296b0 1401 if (r < 0)
5ecb131d 1402 log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring");
4ff296b0
YW		 1403 else
1404 log_link_debug(link, "Setting MTU done.");
55dc8c4a 1405
4ff296b0 1406 if (link->state == LINK_STATE_INITIALIZED) {
3a390124 1407 r = link_configure_continue(link);
4ff296b0
YW		 1408 if (r < 0)
1409 link_enter_failed(link);
1410 }
4f882b2a
TG		 1411
1412 return 1;
1413}
1414
933c70a0 1415int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1416 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1417 int r;
1418
1419 assert(link);
1420 assert(link->manager);
1421 assert(link->manager->rtnl);
1422
40288ece
YW		 1423 if (mtu == 0 || link->setting_mtu)
1424 return 0;
1425
933c70a0 1426 if (link->mtu == mtu)
ee493106
YW		 1427 return 0;
1428
6a7a4e4d 1429 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1430
6a7a4e4d
LP		 1431 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1432 if (r < 0)
1433 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1434
44b598a1 1435 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1436 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1437 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1438
1439 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
d236718c 1440 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes");
44b598a1 1441
72c2500b 1442 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1443 }
1444
1c4baffc 1445 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1446 if (r < 0)
1447 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1448
302a796f
YW		 1449 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1450 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1451 if (r < 0)
1452 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1453
ae941762 1454 link_ref(link);
1046bf9b 1455 link->setting_mtu = true;
b226d99b 1456
4f882b2a
TG		 1457 return 0;
1458}
1459
f6fcc1c2
YW		 1460static bool link_reduces_vlan_mtu(Link *link) {
1461 /* See netif_reduces_vlan_mtu() in kernel. */
1462 return streq_ptr(link->kind, "macsec");
1463}
1464
1465static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1466 uint32_t mtu = 0;
1467 NetDev *dev;
1468 Iterator i;
1469
1470 HASHMAP_FOREACH(dev, link->network->stacked_netdevs, i)
1471 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1472 /* See vlan_dev_change_mtu() in kernel. */
1473 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1474
1475 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1476 /* See macvlan_change_mtu() in kernel. */
1477 mtu = dev->mtu;
1478
1479 return mtu;
1480}
1481
1482static int link_configure_mtu(Link *link) {
1483 uint32_t mtu;
1484
1485 assert(link);
1486 assert(link->network);
1487
1488 if (link->network->mtu > 0)
1489 return link_set_mtu(link, link->network->mtu);
1490
1491 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1492 if (link->mtu >= mtu)
1493 return 0;
1494
1495 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1496 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1497 link->mtu, mtu);
1498
1499 return link_set_mtu(link, mtu);
1500}
1501
302a796f 1502static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1503 int r;
1504
1505 assert(m);
1506 assert(link);
1507 assert(link->ifname);
1508
1509 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1510 return 1;
1511
1512 r = sd_netlink_message_get_errno(m);
1513 if (r < 0)
5ecb131d 1514 log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring");
99d2baa2
SS		 1515
1516 return 1;
1517}
1518
1519static int link_set_flags(Link *link) {
1520 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1521 unsigned ifi_change = 0;
1522 unsigned ifi_flags = 0;
1523 int r;
1524
1525 assert(link);
1526 assert(link->manager);
1527 assert(link->manager->rtnl);
1528
1529 if (link->flags & IFF_LOOPBACK)
1530 return 0;
1531
1532 if (!link->network)
1533 return 0;
1534
866e6b7a 1535 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1536 return 0;
1537
1538 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1539 if (r < 0)
1540 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1541
1542 if (link->network->arp >= 0) {
1543 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1544 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1545 }
1546
1547 if (link->network->multicast >= 0) {
1548 ifi_change |= IFF_MULTICAST;
1549 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1550 }
1551
866e6b7a
SS		 1552 if (link->network->allmulticast >= 0) {
1553 ifi_change |= IFF_ALLMULTI;
1554 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1555 }
1556
99d2baa2
SS		 1557 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1558 if (r < 0)
1559 return log_link_error_errno(link, r, "Could not set link flags: %m");
1560
302a796f
YW		 1561 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1562 link_netlink_destroy_callback, link);
99d2baa2
SS		 1563 if (r < 0)
1564 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1565
1566 link_ref(link);
1567
1568 return 0;
1569}
1570
e7ab854c
TG		 1571static int link_acquire_ipv6_conf(Link *link) {
1572 int r;
1573
1574 assert(link);
1575
e7ab854c 1576 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1577 assert(link->ndisc);
e7ab854c
TG		 1578
1579 log_link_debug(link, "Discovering IPv6 routers");
1580
1e7a0e21 1581 r = sd_ndisc_start(link->ndisc);
63348d13 1582 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1583 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1584 }
1585
7465dd22
PF		 1586 if (link_radv_enabled(link)) {
1587 assert(link->radv);
1588 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1589
1590 log_link_debug(link, "Starting IPv6 Router Advertisements");
1591
fd3ef936
YW		 1592 r = radv_emit_dns(link);
1593 if (r < 0)
1594 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
1595
7465dd22
PF		 1596 r = sd_radv_start(link->radv);
1597 if (r < 0 && r != -EBUSY)
1598 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1599 }
1600
838d39af
SS		 1601 if (link_dhcp6_enabled(link) && IN_SET(link->network->dhcp6_without_ra,
1602 DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST,
1603 DHCP6_CLIENT_START_MODE_SOLICIT)) {
cd305af1
SS		 1604 assert(link->dhcp6_client);
1605 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1606
838d39af 1607 r = dhcp6_request_address(link, link->network->dhcp6_without_ra == DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST);
cd305af1
SS		 1608 if (r < 0 && r != -EBUSY)
1609 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
1610 else
1611 log_link_debug(link, "Acquiring DHCPv6 lease");
1612 }
1613
10752343
PF		 1614 (void) dhcp6_request_prefix_delegation(link);
1615
e7ab854c
TG		 1616 return 0;
1617}
1618
6fc25497 1619static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1620 int r;
1621
1622 assert(link);
ff254138
TG		 1623 assert(link->manager);
1624 assert(link->manager->event);
1625
910feb78 1626 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1627 assert(link->ipv4ll);
ff254138 1628
6a7a4e4d 1629 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1630
1631 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1632 if (r < 0)
1633 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1634 }
1635
78c958f8 1636 if (link_dhcp4_enabled(link)) {
eb34d4af 1637 assert(link->dhcp_client);
ff254138 1638
6a7a4e4d 1639 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1640
5c1d3fc9 1641 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1642 if (r < 0)
1643 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1644 }
ff254138 1645
6fc25497
SS		 1646 return 0;
1647}
1648
1649static int link_acquire_conf(Link *link) {
1650 int r;
1651
1652 assert(link);
1653
1654 r = link_acquire_ipv4_conf(link);
1655 if (r < 0)
1656 return r;
1657
3f7cc080 1658 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1659 r = link_acquire_ipv6_conf(link);
1660 if (r < 0)
1661 return r;
1662 }
1663
7272b25e
LP		 1664 if (link_lldp_emit_enabled(link)) {
1665 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1666 if (r < 0)
1667 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1668 }
1669
ff254138
TG		 1670 return 0;
1671}
1672
a61bb41c 1673bool link_has_carrier(Link *link) {
deb2e523
TG		 1674 /* see Documentation/networking/operstates.txt in the kernel sources */
1675
a61bb41c 1676 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1677 return true;
1678
a61bb41c 1679 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1680 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1681 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1682 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1683 return true;
1684
1685 return false;
1686}
1687
0e2fdb83
SS		 1688static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1689 int r;
1690
1691 assert(link);
1692
9524014e
DS		 1693 link->setting_genmode = false;
1694
0e2fdb83
SS		 1695 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1696 return 1;
1697
1698 r = sd_netlink_message_get_errno(m);
1699 if (r < 0)
5ecb131d 1700 log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring");
9524014e
DS		 1701 else
1702 log_link_debug(link, "Setting address genmode done.");
1703
1704 if (link->state == LINK_STATE_INITIALIZED) {
1705 r = link_configure_continue(link);
1706 if (r < 0)
1707 link_enter_failed(link);
1708 }
0e2fdb83
SS		 1709
1710 return 1;
1711}
1712
1713static int link_configure_addrgen_mode(Link *link) {
1714 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1715 uint8_t ipv6ll_mode;
1716 int r;
1717
1718 assert(link);
1719 assert(link->network);
1720 assert(link->manager);
1721 assert(link->manager->rtnl);
1722
9524014e 1723 if (!socket_ipv6_is_supported() || link->setting_genmode)
9f6e82e6
YW		 1724 return 0;
1725
0e2fdb83
SS		 1726 log_link_debug(link, "Setting address genmode for link");
1727
1728 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1729 if (r < 0)
1730 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1731
1732 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1733 if (r < 0)
1734 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1735
1736 r = sd_netlink_message_open_container(req, AF_INET6);
1737 if (r < 0)
1738 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1739
1740 if (!link_ipv6ll_enabled(link))
1741 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
6f6296b9 1742 else if (link->network->ipv6ll_address_gen_mode < 0) {
a6f1848a
SS		 1743 r = sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL);
1744 if (r < 0) {
1745 /* The file may not exist. And even if it exists, when stable_secret is unset,
1746 * reading the file fails with EIO. */
1747 log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret: %m");
1748
1749 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1750 } else
1751 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1752 } else
6f6296b9 1753 ipv6ll_mode = link->network->ipv6ll_address_gen_mode;
0e2fdb83
SS		 1754
1755 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1756 if (r < 0)
1757 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1758
1759 r = sd_netlink_message_close_container(req);
1760 if (r < 0)
1761 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1762
1763 r = sd_netlink_message_close_container(req);
1764 if (r < 0)
1765 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1766
1767 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1768 link_netlink_destroy_callback, link);
1769 if (r < 0)
1770 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1771
1772 link_ref(link);
9524014e 1773 link->setting_genmode = true;
0e2fdb83
SS		 1774
1775 return 0;
1776}
1777
302a796f 1778static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1779 int r;
1780
1746cf2a
TG		 1781 assert(link);
1782
5da8149f 1783 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1784 return 1;
1785
1c4baffc 1786 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1787 if (r < 0)
26d6b214 1788 /* we warn but don't fail the link, as it may be brought up later */
5ecb131d 1789 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
45ad2c13 1790
f882c247
TG		 1791 return 1;
1792}
1793
1cc84f3b 1794static int link_up(Link *link) {
4afd3348 1795 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1796 int r;
1797
f882c247 1798 assert(link);
c106cc36 1799 assert(link->network);
f882c247
TG		 1800 assert(link->manager);
1801 assert(link->manager->rtnl);
1802
6a7a4e4d 1803 log_link_debug(link, "Bringing link up");
449f7554 1804
6a7a4e4d
LP		 1805 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1806 if (r < 0)
1807 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1808
2b2d8603 1809 /* set it free if not enslaved with networkd */
6cb955c6 1810 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1811 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1812 if (r < 0)
1813 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1814 }
1815
5d4795f3 1816 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1817 if (r < 0)
1818 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1819
c106cc36 1820 if (link->network->mac) {
1c4baffc 1821 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1822 if (r < 0)
1823 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1824 }
1825
302a796f
YW		 1826 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1827 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1828 if (r < 0)
1829 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1830
b226d99b
TG		 1831 link_ref(link);
1832
f882c247
TG		 1833 return 0;
1834}
1835
302a796f 1836static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1837 int r;
1838
1839 assert(link);
1840
1841 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1842 return 1;
1843
1c4baffc 1844 r = sd_netlink_message_get_errno(m);
0d4ad91d 1845 if (r < 0)
5ecb131d 1846 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
0d4ad91d
AR		 1847
1848 return 1;
1849}
1850
8e54db83 1851int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1852 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1853 int r;
1854
1855 assert(link);
1856 assert(link->manager);
1857 assert(link->manager->rtnl);
1858
6a7a4e4d 1859 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1860
1861 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1862 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1863 if (r < 0)
1864 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1865
1866 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1867 if (r < 0)
1868 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1869
8e54db83
YW		 1870 r = netlink_call_async(link->manager->rtnl, NULL, req,
1871 callback ?: link_down_handler,
302a796f 1872 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1873 if (r < 0)
1874 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1875
1876 link_ref(link);
1877
1878 return 0;
1879}
1880
89fe6535
SS		 1881static int link_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1882 int r;
1883
1884 assert(link);
1885
1886 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1887 return 1;
1888
1889 r = sd_netlink_message_get_errno(m);
1890 if (r < 0)
1891 log_link_message_warning_errno(link, m, r, "Could not set group for the interface");
1892
1893 return 1;
1894}
1895
1896static int link_set_group(Link *link) {
1897 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1898 int r;
1899
1900 assert(link);
1901 assert(link->network);
1902 assert(link->manager);
1903 assert(link->manager->rtnl);
1904
1905 if (link->network->group <= 0)
1906 return 0;
1907
1908 log_link_debug(link, "Setting group");
1909
1910 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1911 if (r < 0)
1912 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1913
1914 r = sd_netlink_message_append_u32(req, IFLA_GROUP, link->network->group);
1915 if (r < 0)
1916 return log_link_error_errno(link, r, "Could not set link group: %m");
1917
1918 r = netlink_call_async(link->manager->rtnl, NULL, req, link_group_handler,
1919 link_netlink_destroy_callback, link);
1920 if (r < 0)
1921 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1922
1923 link_ref(link);
1924
1925 return 0;
1926}
1927
0d4ad91d
AR		 1928static int link_handle_bound_to_list(Link *link) {
1929 Link *l;
1930 Iterator i;
1931 int r;
1932 bool required_up = false;
1933 bool link_is_up = false;
1934
1935 assert(link);
1936
1937 if (hashmap_isempty(link->bound_to_links))
1938 return 0;
1939
1940 if (link->flags & IFF_UP)
1941 link_is_up = true;
1942
1943 HASHMAP_FOREACH (l, link->bound_to_links, i)
1944 if (link_has_carrier(l)) {
1945 required_up = true;
1946 break;
1947 }
1948
1949 if (!required_up && link_is_up) {
8e54db83 1950 r = link_down(link, NULL);
0d4ad91d
AR		 1951 if (r < 0)
1952 return r;
1953 } else if (required_up && !link_is_up) {
1954 r = link_up(link);
1955 if (r < 0)
1956 return r;
1957 }
1958
1959 return 0;
1960}
1961
1962static int link_handle_bound_by_list(Link *link) {
1963 Iterator i;
1964 Link *l;
1965 int r;
1966
1967 assert(link);
1968
1969 if (hashmap_isempty(link->bound_by_links))
1970 return 0;
1971
1972 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1973 r = link_handle_bound_to_list(l);
1974 if (r < 0)
1975 return r;
1976 }
1977
1978 return 0;
1979}
1980
1981static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1982 int r;
1983
1984 assert(link);
1985 assert(carrier);
1986
1987 if (link == carrier)
1988 return 0;
1989
1990 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1991 return 0;
1992
1993 r = hashmap_ensure_allocated(h, NULL);
1994 if (r < 0)
1995 return r;
1996
1997 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1998 if (r < 0)
1999 return r;
2000
2001 return 0;
2002}
2003
2004static int link_new_bound_by_list(Link *link) {
2005 Manager *m;
2006 Link *carrier;
2007 Iterator i;
2008 int r;
2009 bool list_updated = false;
2010
2011 assert(link);
2012 assert(link->manager);
2013
2014 m = link->manager;
2015
b295beea 2016 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 2017 if (!carrier->network)
2018 continue;
2019
2020 if (strv_isempty(carrier->network->bind_carrier))
2021 continue;
2022
191a3f16 2023 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 2024 r = link_put_carrier(link, carrier, &link->bound_by_links);
2025 if (r < 0)
2026 return r;
2027
2028 list_updated = true;
2029 }
2030 }
2031
2032 if (list_updated)
84de38c5 2033 link_dirty(link);
0d4ad91d 2034
b295beea 2035 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 2036 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2037 if (r < 0)
2038 return r;
2039
84de38c5 2040 link_dirty(carrier);
0d4ad91d
AR		 2041 }
2042
2043 return 0;
2044}
2045
2046static int link_new_bound_to_list(Link *link) {
2047 Manager *m;
2048 Link *carrier;
2049 Iterator i;
2050 int r;
2051 bool list_updated = false;
2052
2053 assert(link);
2054 assert(link->manager);
2055
2056 if (!link->network)
2057 return 0;
2058
2059 if (strv_isempty(link->network->bind_carrier))
2060 return 0;
2061
2062 m = link->manager;
2063
2064 HASHMAP_FOREACH (carrier, m->links, i) {
191a3f16 2065 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 2066 r = link_put_carrier(link, carrier, &link->bound_to_links);
2067 if (r < 0)
2068 return r;
2069
2070 list_updated = true;
2071 }
2072 }
2073
2074 if (list_updated)
84de38c5 2075 link_dirty(link);
0d4ad91d
AR		 2076
2077 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2078 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2079 if (r < 0)
2080 return r;
2081
84de38c5 2082 link_dirty(carrier);
0d4ad91d
AR		 2083 }
2084
2085 return 0;
2086}
2087
2088static int link_new_carrier_maps(Link *link) {
2089 int r;
2090
2091 r = link_new_bound_by_list(link);
2092 if (r < 0)
2093 return r;
2094
2095 r = link_handle_bound_by_list(link);
2096 if (r < 0)
2097 return r;
2098
2099 r = link_new_bound_to_list(link);
2100 if (r < 0)
2101 return r;
2102
2103 r = link_handle_bound_to_list(link);
2104 if (r < 0)
2105 return r;
2106
2107 return 0;
2108}
2109
2110static void link_free_bound_to_list(Link *link) {
2111 Link *bound_to;
2112 Iterator i;
2113
2114 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2115 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2116
2117 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2118 link_dirty(bound_to);
0d4ad91d
AR		 2119 }
2120
2121 return;
2122}
2123
2124static void link_free_bound_by_list(Link *link) {
2125 Link *bound_by;
2126 Iterator i;
2127
2128 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2129 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2130
2131 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2132 link_dirty(bound_by);
0d4ad91d
AR		 2133 link_handle_bound_to_list(bound_by);
2134 }
2135 }
2136
2137 return;
2138}
2139
2140static void link_free_carrier_maps(Link *link) {
2141 bool list_updated = false;
2142
2143 assert(link);
2144
2145 if (!hashmap_isempty(link->bound_to_links)) {
2146 link_free_bound_to_list(link);
2147 list_updated = true;
2148 }
2149
2150 if (!hashmap_isempty(link->bound_by_links)) {
2151 link_free_bound_by_list(link);
2152 list_updated = true;
2153 }
2154
2155 if (list_updated)
84de38c5 2156 link_dirty(link);
0d4ad91d
AR		 2157
2158 return;
2159}
2160
5f707e12
YW		 2161static int link_append_to_master(Link *link, NetDev *netdev) {
2162 Link *master;
2163 int r;
2164
2165 assert(link);
2166 assert(netdev);
2167
2168 r = link_get(link->manager, netdev->ifindex, &master);
2169 if (r < 0)
2170 return r;
2171
de7fef4b 2172 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 2173 if (r <= 0)
5f707e12
YW		 2174 return r;
2175
2176 link_ref(link);
2177 return 0;
2178}
2179
2180static void link_drop_from_master(Link *link, NetDev *netdev) {
2181 Link *master;
2182
2183 assert(link);
2184
2185 if (!link->manager || !netdev)
2186 return;
2187
2188 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2189 return;
2190
2191 link_unref(set_remove(master->slaves, link));
2192}
2193
2194static void link_detach_from_manager(Link *link) {
2195 if (!link || !link->manager)
2196 return;
2197
2198 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2199 link_clean(link);
2200
2201 /* The following must be called at last. */
2202 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2203 link_unref(link);
2204}
2205
0d4ad91d
AR		 2206void link_drop(Link *link) {
2207 if (!link || link->state == LINK_STATE_LINGER)
2208 return;
2209
2210 link_set_state(link, LINK_STATE_LINGER);
2211
2212 link_free_carrier_maps(link);
2213
5f707e12
YW		 2214 if (link->network) {
2215 link_drop_from_master(link, link->network->bridge);
2216 link_drop_from_master(link, link->network->bond);
2217 }
2218
6a7a4e4d 2219 log_link_debug(link, "Link removed");
0d4ad91d 2220
db2f8a2e 2221 (void) unlink(link->state_file);
c4397d94 2222 link_detach_from_manager(link);
0d4ad91d
AR		 2223}
2224
3f265037 2225static int link_joined(Link *link) {
f882c247
TG		 2226 int r;
2227
ef1ba606 2228 assert(link);
f5be5601 2229 assert(link->network);
dd3efc09 2230
0d4ad91d
AR		 2231 if (!hashmap_isempty(link->bound_to_links)) {
2232 r = link_handle_bound_to_list(link);
2233 if (r < 0)
2234 return r;
2235 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2236 r = link_up(link);
2237 if (r < 0) {
2238 link_enter_failed(link);
2239 return r;
2240 }
ef1ba606 2241 }
f882c247 2242
9ed794a3 2243 if (link->network->bridge) {
e1853b00 2244 r = link_set_bridge(link);
6a7a4e4d
LP		 2245 if (r < 0)
2246 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 2247
2248 r = link_append_to_master(link, link->network->bridge);
2249 if (r < 0)
2250 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 2251 }
2252
eb64b435 2253 if (link->network->bond) {
7fcee284 2254 r = link_set_bond(link);
eb64b435
SS		 2255 if (r < 0)
2256 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2257
45e11abf 2258 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2259 if (r < 0)
2260 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2261 }
2262
ffff9abe
TJ		 2263 if (link->network->use_br_vlan &&
2264 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2265 r = link_set_bridge_vlan(link);
2266 if (r < 0)
2267 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2268 }
2269
c1835a42
RM		 2270 /* Skip setting up addresses until it gets carrier,
2271 or it would try to set addresses twice,
2272 which is bad for non-idempotent steps. */
dad2d78e 2273 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2274 return 0;
2275
b425c3ae 2276 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 2277 return link_request_set_addresses(link);
02b59d57
TG		 2278}
2279
302a796f 2280static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2281 int r;
2282
1746cf2a 2283 assert(link);
ef1ba606 2284 assert(link->network);
34bf3c00 2285 assert(link->enslaving > 0);
02b59d57 2286
313cefa1 2287 link->enslaving--;
52433f6b 2288
5da8149f 2289 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2290 return 1;
2291
1c4baffc 2292 r = sd_netlink_message_get_errno(m);
856f962c 2293 if (r < 0 && r != -EEXIST) {
5ecb131d 2294 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG		 2295 link_enter_failed(link);
2296 return 1;
4ff296b0
YW		 2297 }
2298
2299 log_link_debug(link, "Joined netdev");
02b59d57 2300
34bf3c00 2301 if (link->enslaving == 0) {
4ff296b0
YW		 2302 r = link_joined(link);
2303 if (r < 0)
2304 link_enter_failed(link);
34bf3c00 2305 }
02b59d57
TG		 2306
2307 return 1;
2308}
2309
3f265037 2310static int link_enter_join_netdev(Link *link) {
6a0a2f86 2311 NetDev *netdev;
672682a6 2312 Iterator i;
02b59d57
TG		 2313 int r;
2314
2315 assert(link);
2316 assert(link->network);
bd08ce56 2317 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2318
289e6774 2319 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2320
84de38c5 2321 link_dirty(link);
34bf3c00 2322 link->enslaving = 0;
02b59d57 2323
d9c67ea1 2324 if (link->network->bond) {
cbff7170
TJ		 2325 if (link->network->bond->state == NETDEV_STATE_READY &&
2326 link->network->bond->ifindex == link->master_ifindex)
2327 return link_joined(link);
2328
f2341e0a
LP		 2329 log_struct(LOG_DEBUG,
2330 LOG_LINK_INTERFACE(link),
2331 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2332 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2333
34bf3c00
YW		 2334 link->enslaving++;
2335
f2341e0a 2336 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2337 if (r < 0) {
f2341e0a
LP		 2338 log_struct_errno(LOG_WARNING, r,
2339 LOG_LINK_INTERFACE(link),
2340 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2341 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2342 link_enter_failed(link);
2343 return r;
2344 }
0ad6148e
MO		 2345 }
2346
d9c67ea1 2347 if (link->network->bridge) {
f2341e0a
LP		 2348 log_struct(LOG_DEBUG,
2349 LOG_LINK_INTERFACE(link),
2350 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2351 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2352
34bf3c00
YW		 2353 link->enslaving++;
2354
f2341e0a 2355 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2356 if (r < 0) {
f2341e0a
LP		 2357 log_struct_errno(LOG_WARNING, r,
2358 LOG_LINK_INTERFACE(link),
2359 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2360 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2361 link_enter_failed(link);
2362 return r;
2363 }
52433f6b
TG		 2364 }
2365
6cb955c6
AR		 2366 if (link->network->vrf) {
2367 log_struct(LOG_DEBUG,
2368 LOG_LINK_INTERFACE(link),
2369 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2370 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2371
34bf3c00
YW		 2372 link->enslaving++;
2373
6cb955c6
AR		 2374 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2375 if (r < 0) {
2376 log_struct_errno(LOG_WARNING, r,
2377 LOG_LINK_INTERFACE(link),
2378 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2379 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2380 link_enter_failed(link);
2381 return r;
2382 }
6cb955c6
AR		 2383 }
2384
6a0a2f86 2385 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2386
2b6db913
YW		 2387 if (netdev->ifindex > 0)
2388 /* Assume already enslaved. */
a63e5daa 2389 continue;
a63e5daa 2390
7033af49
YW		 2391 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2392 continue;
2393
f2341e0a
LP		 2394 log_struct(LOG_DEBUG,
2395 LOG_LINK_INTERFACE(link),
2396 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2397 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2398
34bf3c00
YW		 2399 link->enslaving++;
2400
f2341e0a 2401 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2402 if (r < 0) {
f2341e0a
LP		 2403 log_struct_errno(LOG_WARNING, r,
2404 LOG_LINK_INTERFACE(link),
2405 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2406 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2407 link_enter_failed(link);
2408 return r;
2409 }
326cb406
SS		 2410 }
2411
34bf3c00
YW		 2412 if (link->enslaving == 0)
2413 return link_joined(link);
2414
ef1ba606
TG		 2415 return 0;
2416}
2417
769d324c 2418static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2419 int r;
2420
765afd5c 2421 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2422 return 0;
2423
765afd5c
LP		 2424 /* We propagate the forwarding flag from one interface to the
2425 * global setting one way. This means: as long as at least one
2426 * interface was configured at any time that had IP forwarding
2427 * enabled the setting will stay on for good. We do this
2428 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2429 * somewhat in sync (see below). */
15dee3f0 2430
62e021a9 2431 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2432 if (r < 0)
765afd5c 2433 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2434
769d324c
LP		 2435 return 0;
2436}
2437
2438static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2439 int r;
2440
765afd5c 2441 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2442 return 0;
2443
61233823 2444 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2445 * packet forwarding setting: either packet forwarding is on
2446 * for all, or off for all. We hence don't bother with a
2447 * per-interface setting, but simply propagate the interface
2448 * flag, if it is set, to the global flag, one-way. Note that
2449 * while IPv4 would allow a per-interface flag, we expose the
2450 * same behaviour there and also propagate the setting from
2451 * one to all, to keep things simple (see above). */
15dee3f0 2452
62e021a9 2453 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2454 if (r < 0)
765afd5c 2455 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2456
2457 return 0;
2458}
2459
49092e22 2460static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2461 IPv6PrivacyExtensions s;
49092e22
SS		 2462 int r;
2463
1f0d9695 2464 s = link_ipv6_privacy_extensions(link);
66a6bd68 2465 if (s < 0)
49092e22
SS		 2466 return 0;
2467
62e021a9 2468 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2469 if (r < 0)
49092e22
SS		 2470 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2471
2472 return 0;
2473}
2474
4f2e437a 2475static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2476 int r;
2477
2478 /* Make this a NOP if IPv6 is not available */
2479 if (!socket_ipv6_is_supported())
2480 return 0;
2481
2482 if (link->flags & IFF_LOOPBACK)
2483 return 0;
2484
d68e2e59
LP		 2485 if (!link->network)
2486 return 0;
2487
62e021a9 2488 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2489 if (r < 0)
fe307276 2490 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2491
2492 return 0;
2493}
2494
8749cbcd 2495static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2496 int r;
2497
2498 /* Make this a NOP if IPv6 is not available */
2499 if (!socket_ipv6_is_supported())
2500 return 0;
2501
2502 if (link->flags & IFF_LOOPBACK)
2503 return 0;
2504
d68e2e59
LP		 2505 if (!link->network)
2506 return 0;
2507
8749cbcd
SS		 2508 if (link->network->ipv6_dad_transmits < 0)
2509 return 0;
2510
62e021a9 2511 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2512 if (r < 0)
8749cbcd 2513 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2514
2515 return 0;
2516}
2517
b69c3180 2518static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2519 int r;
2520
2521 /* Make this a NOP if IPv6 is not available */
2522 if (!socket_ipv6_is_supported())
2523 return 0;
2524
2525 if (link->flags & IFF_LOOPBACK)
2526 return 0;
2527
d68e2e59
LP		 2528 if (!link->network)
2529 return 0;
2530
b69c3180
SS		 2531 if (link->network->ipv6_hop_limit < 0)
2532 return 0;
2533
62e021a9 2534 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2535 if (r < 0)
b69c3180 2536 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2537
2538 return 0;
2539}
2540
11102cba 2541static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2542 int r;
2543
2544 /* Make this a NOP if IPv6 is not available */
2545 if (!socket_ipv6_is_supported())
2546 return 0;
2547
2548 if (link->flags & IFF_LOOPBACK)
2549 return 0;
2550
2551 if (link->network->ipv6_mtu == 0)
2552 return 0;
2553
d236718c
DS		 2554 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
2555 * on the interface. Bump up IPv6 MTU bytes to IPV6_MTU_MIN. */
2556 if (link->network->ipv6_mtu < IPV6_MIN_MTU) {
2557 log_link_notice(link, "Bumping IPv6 MTU to "STRINGIFY(IPV6_MIN_MTU)" byte minimum required");
2558 link->network->ipv6_mtu = IPV6_MIN_MTU;
2559 }
2560
62e021a9 2561 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
d236718c
DS		 2562 if (r < 0) {
2563 if (link->mtu < link->network->ipv6_mtu)
2564 log_link_warning(link, "Cannot set IPv6 MTU %"PRIu32" higher than device MTU %"PRIu32,
2565 link->network->ipv6_mtu, link->mtu);
2566 else
2567 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2568 }
2569
2570 link->ipv6_mtu_set = true;
11102cba
SS		 2571
2572 return 0;
2573}
2574
94d76d07
YW		 2575static int link_set_ipv4_accept_local(Link *link) {
2576 int r;
2577
2578 if (link->flags & IFF_LOOPBACK)
2579 return 0;
2580
2581 if (link->network->ipv4_accept_local < 0)
2582 return 0;
2583
2584 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "accept_local", link->network->ipv4_accept_local);
2585 if (r < 0)
2586 log_link_warning_errno(link, r, "Cannot set IPv4 accept_local flag for interface: %m");
2587
2588 return 0;
2589}
2590
30226d27
TJ		 2591static bool link_is_static_address_configured(Link *link, Address *address) {
2592 Address *net_address;
2593
2594 assert(link);
2595 assert(address);
2596
2597 if (!link->network)
2598 return false;
2599
2600 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2601 if (address_equal(net_address, address))
2602 return true;
2603
2604 return false;
2605}
2606
d1bdafd2
WKI		 2607static bool link_is_neighbor_configured(Link *link, Neighbor *neighbor) {
2608 Neighbor *net_neighbor;
2609
2610 assert(link);
2611 assert(neighbor);
2612
2613 if (!link->network)
2614 return false;
2615
2616 LIST_FOREACH(neighbors, net_neighbor, link->network->neighbors)
2617 if (neighbor_equal(net_neighbor, neighbor))
2618 return true;
2619
2620 return false;
2621}
2622
7ecf0c3e
TJ		 2623static bool link_is_static_route_configured(Link *link, Route *route) {
2624 Route *net_route;
2625
2626 assert(link);
2627 assert(route);
2628
2629 if (!link->network)
2630 return false;
2631
2632 LIST_FOREACH(routes, net_route, link->network->static_routes)
2633 if (route_equal(net_route, route))
2634 return true;
2635
2636 return false;
2637}
2638
db51778f
YW		 2639static bool link_address_is_dynamic(Link *link, Address *address) {
2640 Route *route;
2641 Iterator i;
2642
2643 assert(link);
2644 assert(address);
2645
2646 if (address->cinfo.ifa_prefered != CACHE_INFO_INFINITY_LIFE_TIME)
2647 return true;
2648
2649 /* Even when the address is leased from a DHCP server, networkd assign the address
2650 * without lifetime when KeepConfiguration=dhcp. So, let's check that we have
2651 * corresponding routes with RTPROT_DHCP. */
2652 SET_FOREACH(route, link->routes_foreign, i) {
2653 if (route->protocol != RTPROT_DHCP)
2654 continue;
2655
2656 if (address->family != route->family)
2657 continue;
2658
2659 if (in_addr_equal(address->family, &address->in_addr, &route->prefsrc))
2660 return true;
2661 }
2662
2663 return false;
2664}
2665
0917a271
DS		 2666static int link_enumerate_ipv6_tentative_addresses(Link *link) {
2667 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
2668 sd_netlink_message *addr;
2669 int r;
2670
2671 assert(link);
2672 assert(link->manager);
2673 assert(link->manager->rtnl);
2674
2675 r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_GETADDR, 0, AF_INET6);
2676 if (r < 0)
2677 return r;
2678
2679 r = sd_netlink_call(link->manager->rtnl, req, 0, &reply);
2680 if (r < 0)
2681 return r;
2682
2683 for (addr = reply; addr; addr = sd_netlink_message_next(addr)) {
2684 unsigned char flags;
2685 int ifindex;
2686
2687 r = sd_rtnl_message_addr_get_ifindex(addr, &ifindex);
2688 if (r < 0) {
2689 log_link_warning_errno(link, r, "rtnl: invalid ifindex, ignoring: %m");
2690 continue;
2691 } else if (link->ifindex != ifindex)
2692 continue;
2693
2694 r = sd_rtnl_message_addr_get_flags(addr, &flags);
2695 if (r < 0) {
2696 log_link_warning_errno(link, r, "rtnl: received address message with invalid flags, ignoring: %m");
2697 continue;
2698 } else if (!(flags & IFA_F_TENTATIVE))
2699 continue;
2700
2701 log_link_debug(link, "Found tentative ipv6 link-local address");
2702 (void) manager_rtnl_process_address(link->manager->rtnl, addr, link->manager);
2703 }
2704
2705 return 0;
2706}
2707
5e5b137a
TG		 2708static int link_drop_foreign_config(Link *link) {
2709 Address *address;
d1bdafd2 2710 Neighbor *neighbor;
5e5b137a
TG		 2711 Route *route;
2712 Iterator i;
2713 int r;
2714
0917a271
DS		 2715 /* The kernel doesn't notify us about tentative addresses;
2716 * so if ipv6ll is disabled, we need to enumerate them now so we can drop them below */
2717 if (!link_ipv6ll_enabled(link)) {
2718 r = link_enumerate_ipv6_tentative_addresses(link);
2719 if (r < 0)
2720 return r;
2721 }
2722
5e5b137a 2723 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2724 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2725 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
5e5b137a
TG		 2726 continue;
2727
db51778f 2728 if (link_address_is_dynamic(link, address)) {
b1b0b42e 2729 if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
db51778f 2730 continue;
b1b0b42e 2731 } else if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
db51778f
YW		 2732 continue;
2733
30226d27
TJ		 2734 if (link_is_static_address_configured(link, address)) {
2735 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2736 if (r < 0)
2737 return log_link_error_errno(link, r, "Failed to add address: %m");
2738 } else {
63ae0569 2739 r = address_remove(address, link, NULL);
30226d27
TJ		 2740 if (r < 0)
2741 return r;
2742 }
5e5b137a
TG		 2743 }
2744
d1bdafd2
WKI		 2745 SET_FOREACH(neighbor, link->neighbors_foreign, i) {
2746 if (link_is_neighbor_configured(link, neighbor)) {
2747 r = neighbor_add(link, neighbor->family, &neighbor->in_addr, &neighbor->lladdr, neighbor->lladdr_size, NULL);
2748 if (r < 0)
2749 return r;
2750 } else {
2751 r = neighbor_remove(neighbor, link, NULL);
2752 if (r < 0)
2753 return r;
2754 }
2755 }
2756
5e5b137a 2757 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2758 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2759 if (route->protocol == RTPROT_KERNEL)
2760 continue;
2761
bd7d6cec
YW		 2762 /* do not touch multicast route added by kernel */
2763 /* FIXME: Why the kernel adds this route with protocol RTPROT_BOOT??? We need to investigate that.
2764 * https://tools.ietf.org/html/rfc4862#section-5.4 may explain why. */
2765 if (route->protocol == RTPROT_BOOT &&
2766 route->family == AF_INET6 &&
2767 route->dst_prefixlen == 8 &&
2768 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 }}} }))
2769 continue;
2770
b1b0b42e 2771 if (route->protocol == RTPROT_STATIC && link->network &&
db51778f
YW		 2772 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2773 continue;
2774
b1b0b42e 2775 if (route->protocol == RTPROT_DHCP && link->network &&
db51778f
YW		 2776 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2777 continue;
2778
7ecf0c3e 2779 if (link_is_static_route_configured(link, route)) {
f1368755 2780 r = route_add(link, route, NULL);
7ecf0c3e
TJ		 2781 if (r < 0)
2782 return r;
2783 } else {
4645ad47 2784 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2785 if (r < 0)
2786 return r;
2787 }
5e5b137a
TG		 2788 }
2789
2790 return 0;
2791}
2792
3104883d 2793static int link_drop_config(Link *link) {
410a7f15 2794 Address *address, *pool_address;
d1bdafd2 2795 Neighbor *neighbor;
3104883d
SS		 2796 Route *route;
2797 Iterator i;
2798 int r;
2799
2800 SET_FOREACH(address, link->addresses, i) {
2801 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2802 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
3104883d
SS		 2803 continue;
2804
63ae0569 2805 r = address_remove(address, link, NULL);
3104883d
SS		 2806 if (r < 0)
2807 return r;
410a7f15
RM		 2808
2809 /* If this address came from an address pool, clean up the pool */
2810 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2811 if (address_equal(address, pool_address)) {
2812 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2813 address_free(pool_address);
2814 break;
2815 }
2816 }
3104883d
SS		 2817 }
2818
d1bdafd2
WKI		 2819 SET_FOREACH(neighbor, link->neighbors, i) {
2820 r = neighbor_remove(neighbor, link, NULL);
2821 if (r < 0)
2822 return r;
2823 }
2824
3104883d
SS		 2825 SET_FOREACH(route, link->routes, i) {
2826 /* do not touch routes managed by the kernel */
2827 if (route->protocol == RTPROT_KERNEL)
2828 continue;
2829
4645ad47 2830 r = route_remove(route, link, NULL);
3104883d
SS		 2831 if (r < 0)
2832 return r;
2833 }
2834
c69305ff
LP		 2835 ndisc_flush(link);
2836
3104883d
SS		 2837 return 0;
2838}
2839
051e77ca
SS		 2840static int link_configure_ipv4_dad(Link *link) {
2841 Address *address;
2842 int r;
2843
2844 assert(link);
2845 assert(link->network);
2846
2847 LIST_FOREACH(addresses, address, link->network->static_addresses)
2848 if (address->family == AF_INET &&
2849 FLAGS_SET(address->duplicate_address_detection, ADDRESS_FAMILY_IPV4)) {
2850 r = configure_ipv4_duplicate_address_detection(link, address);
2851 if (r < 0)
2852 return log_link_error_errno(link, r, "Failed to configure IPv4ACD: %m");
2853 }
2854
2855 return 0;
2856}
2857
34658df2
YW		 2858static int link_configure_traffic_control(Link *link) {
2859 TrafficControl *tc;
0f5bd7fe 2860 Iterator i;
02b59d57
TG		 2861 int r;
2862
34658df2
YW		 2863 link->tc_configured = false;
2864 link->tc_messages = 0;
4ecdcb07 2865
34658df2
YW		 2866 ORDERED_HASHMAP_FOREACH(tc, link->network->tc_by_section, i) {
2867 r = traffic_control_configure(link, tc);
4ecdcb07
YW		 2868 if (r < 0)
2869 return r;
2870 }
2871
34658df2
YW		 2872 if (link->tc_messages == 0)
2873 link->tc_configured = true;
4ecdcb07 2874 else
34658df2 2875 log_link_debug(link, "Configuring traffic control");
4ecdcb07
YW		 2876
2877 return 0;
2878}
2879
518cd6b5
SS		 2880static int link_configure_sr_iov(Link *link) {
2881 SRIOV *sr_iov;
2882 Iterator i;
2883 int r;
2884
2885 link->sr_iov_configured = false;
2886 link->sr_iov_messages = 0;
2887
2888 ORDERED_HASHMAP_FOREACH(sr_iov, link->network->sr_iov_by_section, i) {
2889 r = sr_iov_configure(link, sr_iov);
2890 if (r < 0)
2891 return r;
2892 }
2893
2894 if (link->sr_iov_messages == 0)
2895 link->sr_iov_configured = true;
2896 else
2897 log_link_debug(link, "Configuring SR-IOV");
2898
2899 return 0;
2900}
2901
4ecdcb07
YW		 2902static int link_configure(Link *link) {
2903 int r;
2904
ef1ba606 2905 assert(link);
b22d8a00 2906 assert(link->network);
bd08ce56 2907 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2908
34658df2 2909 r = link_configure_traffic_control(link);
4ecdcb07
YW		 2910 if (r < 0)
2911 return r;
2912
518cd6b5
SS		 2913 r = link_configure_sr_iov(link);
2914 if (r < 0)
2915 return r;
2916
500b96eb 2917 if (link->iftype == ARPHRD_CAN)
93ea7750 2918 return link_configure_can(link);
92c918b0 2919
482efedc
SS		 2920 /* If IPv6 configured that is static IPv6 address and IPv6LL autoconfiguration is enabled
2921 * for this interface, then enable IPv6 */
57ad7607 2922 (void) link_update_ipv6_sysctl(link);
482efedc 2923
23d8b221
SS		 2924 r = link_set_proxy_arp(link);
2925 if (r < 0)
2926 return r;
2927
a0e5c15d
FK		 2928 r = ipv6_proxy_ndp_addresses_configure(link);
2929 if (r < 0)
2930 return r;
2931
769d324c
LP		 2932 r = link_set_ipv4_forward(link);
2933 if (r < 0)
2934 return r;
2935
2936 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2937 if (r < 0)
2938 return r;
2939
49092e22
SS		 2940 r = link_set_ipv6_privacy_extensions(link);
2941 if (r < 0)
2942 return r;
2943
4f2e437a
SS		 2944 r = link_set_ipv6_accept_ra(link);
2945 if (r < 0)
2946 return r;
2947
8749cbcd
SS		 2948 r = link_set_ipv6_dad_transmits(link);
2949 if (r < 0)
2950 return r;
b69c3180
SS		 2951
2952 r = link_set_ipv6_hop_limit(link);
2953 if (r < 0)
2954 return r;
8749cbcd 2955
94d76d07
YW		 2956 r = link_set_ipv4_accept_local(link);
2957 if (r < 0)
2958 return r;
2959
99d2baa2
SS		 2960 r = link_set_flags(link);
2961 if (r < 0)
2962 return r;
2963
89fe6535
SS		 2964 r = link_set_group(link);
2965 if (r < 0)
2966 return r;
2967
910feb78 2968 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
b22d8a00 2969 r = ipv4ll_configure(link);
eb34d4af
TG		 2970 if (r < 0)
2971 return r;
2972 }
2973
78c958f8 2974 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2975 r = dhcp4_set_promote_secondaries(link);
2976 if (r < 0)
2977 return r;
2978
3c9b8860 2979 r = dhcp4_configure(link);
eb34d4af
TG		 2980 if (r < 0)
2981 return r;
eb34d4af
TG		 2982 }
2983
78c958f8 2984 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2985 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2986 if (r < 0)
2987 return r;
2988
2989 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2990 if (r < 0)
2991 return r;
dd43110f
TG		 2992 }
2993
62379e88
TG		 2994 if (link_dhcp6_enabled(link) ||
2995 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2996 r = dhcp6_configure(link);
2997 if (r < 0)
2998 return r;
2999 }
3000
3001 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 3002 r = ndisc_configure(link);
4138fb2c
PF		 3003 if (r < 0)
3004 return r;
3005 }
3006
7465dd22
PF		 3007 if (link_radv_enabled(link)) {
3008 r = radv_configure(link);
3009 if (r < 0)
3010 return r;
3011 }
3012
8e1ad1ea 3013 if (link_lldp_rx_enabled(link)) {
7f853950 3014 r = link_lldp_rx_configure(link);
273eec24
LP		 3015 if (r < 0)
3016 return r;
ce43e484
SS		 3017 }
3018
f6fcc1c2 3019 r = link_configure_mtu(link);
40288ece
YW		 3020 if (r < 0)
3021 return r;
44b598a1 3022
9f6e82e6
YW		 3023 r = link_configure_addrgen_mode(link);
3024 if (r < 0)
3025 return r;
0e2fdb83 3026
051e77ca
SS		 3027 r = link_configure_ipv4_dad(link);
3028 if (r < 0)
3029 return r;
3030
3a390124
DS		 3031 return link_configure_continue(link);
3032}
3033
3034/* The configuration continues in this separate function, instead of
3035 * including this in the above link_configure() function, for two
3036 * reasons:
3037 * 1) some devices reset the link when the mtu is set, which caused
3038 * an infinite loop here in networkd; see:
3039 * https://github.com/systemd/systemd/issues/6593
3040 * https://github.com/systemd/systemd/issues/9831
3041 * 2) if ipv6ll is disabled, then bringing the interface up must be
3042 * delayed until after we get confirmation from the kernel that
3043 * the addr_gen_mode parameter has been set (via netlink), see:
3044 * https://github.com/systemd/systemd/issues/13882
3045 */
3046static int link_configure_continue(Link *link) {
55dc8c4a
YW		 3047 int r;
3048
3049 assert(link);
3050 assert(link->network);
bd08ce56 3051 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a 3052
9524014e 3053 if (link->setting_mtu || link->setting_genmode)
55dc8c4a
YW		 3054 return 0;
3055
4c649652
DS		 3056 /* Drop foreign config, but ignore loopback or critical devices.
3057 * We do not want to remove loopback address or addresses used for root NFS. */
3058 if (!(link->flags & IFF_LOOPBACK) &&
3059 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
3060 r = link_drop_foreign_config(link);
3061 if (r < 0)
3062 return r;
3063 }
3064
d236718c
DS		 3065 /* The kernel resets ipv6 mtu after changing device mtu;
3066 * we must set this here, after we've set device mtu */
3067 r = link_set_ipv6_mtu(link);
3068 if (r < 0)
3069 return r;
3070
dad2d78e 3071 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 3072 r = link_acquire_conf(link);
3073 if (r < 0)
3074 return r;
cc544d5f 3075 }
1e9be60b 3076
3f265037 3077 return link_enter_join_netdev(link);
505f8da7
TG		 3078}
3079
27dfc982
YW		 3080static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
3081 assert(duid);
3082
3083 if (duid->raw_data_len > 0)
3084 return 0;
3085
3086 if (duid->type != DUID_TYPE_UUID)
3087 return -EINVAL;
3088
3089 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
3090 duid->raw_data_len = sizeof(sd_id128_t);
3091
3092 return 1;
3093}
3094
3095int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
3096 Manager *manager = userdata;
3097 const sd_bus_error *e;
3098 const void *a;
3099 size_t sz;
3100 DUID *duid;
3101 Link *link;
3102 int r;
3103
3104 assert(m);
3105 assert(manager);
3106
3107 e = sd_bus_message_get_error(m);
3108 if (e) {
3109 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 3110 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 3111 e->message);
3112 goto configure;
3113 }
3114
3115 r = sd_bus_message_read_array(m, 'y', &a, &sz);
3116 if (r < 0)
3117 goto configure;
3118
3119 if (sz != sizeof(sd_id128_t)) {
ab4dd984 3120 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 3121 goto configure;
3122 }
3123
3124 memcpy(&manager->product_uuid, a, sz);
3125 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
3126 (void) duid_set_uuid(duid, manager->product_uuid);
3127
3128 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
3129
3130configure:
3131 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3dc2e7af
YW		 3132 link_unref(link);
3133
27dfc982
YW		 3134 r = link_configure(link);
3135 if (r < 0)
4ff296b0 3136 link_enter_failed(link);
27dfc982
YW		 3137 }
3138
3139 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
3140
3141 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
3142 * even if the method fails. */
3143 manager->has_product_uuid = true;
3144
3145 return 1;
3146}
3147
3148static bool link_requires_uuid(Link *link) {
3149 const DUID *duid;
3150
3151 assert(link);
3152 assert(link->manager);
3153 assert(link->network);
3154
3155 duid = link_get_duid(link);
3156 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
3157 return false;
3158
3159 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
3160 return true;
3161
3162 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
3163 return true;
3164
3165 return false;
3166}
3167
3168static int link_configure_duid(Link *link) {
3169 Manager *m;
3170 DUID *duid;
3171 int r;
3172
3173 assert(link);
3174 assert(link->manager);
3175 assert(link->network);
3176
3177 m = link->manager;
3178 duid = link_get_duid(link);
3179
3180 if (!link_requires_uuid(link))
3181 return 1;
3182
3183 if (m->has_product_uuid) {
3184 (void) duid_set_uuid(duid, m->product_uuid);
3185 return 1;
3186 }
3187
3188 if (!m->links_requesting_uuid) {
3189 r = manager_request_product_uuid(m, link);
3190 if (r < 0) {
3191 if (r == -ENOMEM)
3192 return r;
3193
ab4dd984
ZJS		 3194 log_link_warning_errno(link, r,
3195 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 3196 return 1;
3197 }
3198 } else {
3199 r = set_put(m->links_requesting_uuid, link);
3200 if (r < 0)
3201 return log_oom();
39dbd0c7
ZJS		 3202 if (r > 0)
3203 link_ref(link);
27dfc982
YW		 3204
3205 r = set_put(m->duids_requesting_uuid, duid);
3206 if (r < 0)
3207 return log_oom();
3208 }
3209
3210 return 0;
3211}
3212
572b21d9 3213static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
ad932b15
YW		 3214 Network *network;
3215 int r;
3216
572b21d9
YW		 3217 if (m) {
3218 _cleanup_strv_free_ char **s = NULL;
3219
3220 r = sd_netlink_message_get_errno(m);
3221 if (r < 0)
3222 return r;
3223
3224 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3225 if (r < 0 && r != -ENODATA)
3226 return r;
3227
3228 strv_free_and_replace(link->alternative_names, s);
3229 }
3230
c643bda5
YW		 3231 r = network_get(link->manager, link->iftype, link->sd_device,
3232 link->ifname, link->alternative_names, link->driver,
3233 &link->mac, &link->permanent_mac,
3234 link->wlan_iftype, link->ssid, &link->bssid, &network);
ad932b15
YW		 3235 if (r == -ENOENT) {
3236 link_enter_unmanaged(link);
3237 return 0;
3238 } else if (r == 0 && network->unmanaged) {
3239 link_enter_unmanaged(link);
3240 return 0;
3241 } else if (r < 0)
3242 return r;
3243
99b8517c 3244 if (link->network == network && !force)
ad932b15
YW		 3245 return 0;
3246
3247 log_link_info(link, "Re-configuring with %s", network->filename);
3248
3249 /* Dropping old .network file */
3250 r = link_stop_clients(link, false);
572b21d9 3251 if (r < 0)
ad932b15 3252 return r;
ad932b15
YW		 3253
3254 if (link_dhcp4_server_enabled(link))
3255 (void) sd_dhcp_server_stop(link->dhcp_server);
3256
3257 r = link_drop_config(link);
3258 if (r < 0)
3259 return r;
3260
2c7b826d 3261 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
ad932b15
YW		 3262 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
3263 r = link_drop_foreign_config(link);
3264 if (r < 0)
3265 return r;
3266 }
3267
3268 link_free_carrier_maps(link);
3269 link_free_engines(link);
3270 link->network = network_unref(link->network);
3271
3272 /* Then, apply new .network file */
3273 r = network_apply(network, link);
3274 if (r < 0)
3275 return r;
3276
3277 r = link_new_carrier_maps(link);
3278 if (r < 0)
3279 return r;
3280
3281 link_set_state(link, LINK_STATE_INITIALIZED);
8ae7b8a1 3282 link_dirty(link);
ad932b15
YW		 3283
3284 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3285 * link_configure() is called later asynchronously. */
3286 r = link_configure_duid(link);
3287 if (r <= 0)
3288 return r;
3289
3290 r = link_configure(link);
3291 if (r < 0)
3292 return r;
3293
3294 return 0;
3295}
3296
572b21d9
YW		 3297static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3298 int r;
3299
3300 r = link_reconfigure_internal(link, m, false);
3301 if (r < 0)
3302 link_enter_failed(link);
3303
3304 return 1;
3305}
3306
3307static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3308 int r;
3309
3310 r = link_reconfigure_internal(link, m, true);
3311 if (r < 0)
3312 link_enter_failed(link);
3313
3314 return 1;
3315}
3316
3317int link_reconfigure(Link *link, bool force) {
3318 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
3319 int r;
3320
2c0d7ed3
YW		 3321 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
3322 return 0;
3323
572b21d9
YW		 3324 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3325 link->ifindex);
3326 if (r < 0)
3327 return r;
3328
3329 r = netlink_call_async(link->manager->rtnl, NULL, req,
3330 force ? link_force_reconfigure_handler : link_reconfigure_handler,
3331 link_netlink_destroy_callback, link);
3332 if (r < 0)
3333 return r;
3334
3335 link_ref(link);
3336
3337 return 0;
3338}
3339
e6bf7774 3340static int link_initialized_and_synced(Link *link) {
505f8da7 3341 Network *network;
505f8da7
TG		 3342 int r;
3343
3344 assert(link);
3345 assert(link->ifname);
3346 assert(link->manager);
3347
bd08ce56
YW		 3348 /* We may get called either from the asynchronous netlink callback,
3349 * or directly for link_add() if running in a container. See link_add(). */
3350 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 3351 return 0;
505f8da7 3352
6a7a4e4d 3353 log_link_debug(link, "Link state is up-to-date");
bd08ce56 3354 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 3355
0d4ad91d
AR		 3356 r = link_new_bound_by_list(link);
3357 if (r < 0)
3358 return r;
3359
3360 r = link_handle_bound_by_list(link);
3361 if (r < 0)
3362 return r;
3363
c4a03a56 3364 if (!link->network) {
0894cfe4 3365 r = wifi_get_info(link);
8d968fdd
YW		 3366 if (r < 0)
3367 return r;
3368
c643bda5
YW		 3369 r = network_get(link->manager, link->iftype, link->sd_device,
3370 link->ifname, link->alternative_names, link->driver,
3371 &link->mac, &link->permanent_mac,
3372 link->wlan_iftype, link->ssid, &link->bssid, &network);
c4a03a56
TG		 3373 if (r == -ENOENT) {
3374 link_enter_unmanaged(link);
4232cf04 3375 return 0;
a09dc546
DM		 3376 } else if (r == 0 && network->unmanaged) {
3377 link_enter_unmanaged(link);
3378 return 0;
c4a03a56
TG		 3379 } else if (r < 0)
3380 return r;
505f8da7 3381
c4a03a56
TG		 3382 if (link->flags & IFF_LOOPBACK) {
3383 if (network->link_local != ADDRESS_FAMILY_NO)
3384 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3385
c4a03a56
TG		 3386 if (network->dhcp != ADDRESS_FAMILY_NO)
3387 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3388
c4a03a56
TG		 3389 if (network->dhcp_server)
3390 log_link_debug(link, "Ignoring DHCP server for loopback link");
3391 }
bd2efe92 3392
7d342c03 3393 r = network_apply(network, link);
c4a03a56
TG		 3394 if (r < 0)
3395 return r;
3396 }
505f8da7 3397
0d4ad91d
AR		 3398 r = link_new_bound_to_list(link);
3399 if (r < 0)
3400 return r;
3401
27dfc982
YW		 3402 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3403 * link_configure() is called later asynchronously. */
3404 r = link_configure_duid(link);
3405 if (r <= 0)
3406 return r;
3407
a748b692
TG		 3408 r = link_configure(link);
3409 if (r < 0)
3410 return r;
3411
4232cf04 3412 return 0;
505f8da7
TG		 3413}
3414
302a796f 3415static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
572b21d9 3416 _cleanup_strv_free_ char **s = NULL;
4ff296b0
YW		 3417 int r;
3418
572b21d9
YW		 3419 r = sd_netlink_message_get_errno(m);
3420 if (r < 0) {
40681e5c 3421 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 3422 link_enter_failed(link);
3423 return 0;
3424 }
3425
3426 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3427 if (r < 0 && r != -ENODATA) {
3428 link_enter_failed(link);
3429 return 0;
3430 }
3431
3432 strv_free_and_replace(link->alternative_names, s);
3433
4ff296b0
YW		 3434 r = link_initialized_and_synced(link);
3435 if (r < 0)
3436 link_enter_failed(link);
e6bf7774
YW		 3437 return 1;
3438}
3439
51517f9e 3440int link_initialized(Link *link, sd_device *device) {
4afd3348 3441 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3442 int r;
3443
3444 assert(link);
3445 assert(link->manager);
3446 assert(link->manager->rtnl);
3447 assert(device);
3448
8434fd5c 3449 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3450 return 0;
3451
51517f9e 3452 if (link->sd_device)
679b3605
TG		 3453 return 0;
3454
79008bdd 3455 log_link_debug(link, "udev initialized link");
bd08ce56 3456 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 3457
51517f9e 3458 link->sd_device = sd_device_ref(device);
4f561e8e 3459
3c9b8860
TG		 3460 /* udev has initialized the link, but we don't know if we have yet
3461 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3462 * when it returns we know that the pending NEWLINKs have already been
3463 * processed and that we are up-to-date */
4f561e8e 3464
3c9b8860
TG		 3465 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3466 link->ifindex);
4f561e8e
TG		 3467 if (r < 0)
3468 return r;
3469
302a796f
YW		 3470 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3471 link_netlink_destroy_callback, link);
4f561e8e
TG		 3472 if (r < 0)
3473 return r;
3474
5da8149f
TG		 3475 link_ref(link);
3476
4f561e8e
TG		 3477 return 0;
3478}
3479
c4a03a56 3480static int link_load(Link *link) {
0bc70f1d
TG		 3481 _cleanup_free_ char *network_file = NULL,
3482 *addresses = NULL,
f703cc2c 3483 *routes = NULL,
0bc70f1d
TG		 3484 *dhcp4_address = NULL,
3485 *ipv4ll_address = NULL;
3486 union in_addr_union address;
c4a03a56
TG		 3487 int r;
3488
3489 assert(link);
3490
aa8fbc74 3491 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3492 "NETWORK_FILE", &network_file,
3493 "ADDRESSES", &addresses,
f703cc2c 3494 "ROUTES", &routes,
0bc70f1d 3495 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3496 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3497 if (r < 0 && r != -ENOENT)
3498 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3499
3500 if (network_file) {
3501 Network *network;
3502 char *suffix;
3503
3504 /* drop suffix */
3505 suffix = strrchr(network_file, '.');
3506 if (!suffix) {
3507 log_link_debug(link, "Failed to get network name from %s", network_file);
3508 goto network_file_fail;
3509 }
3510 *suffix = '\0';
3511
3512 r = network_get_by_name(link->manager, basename(network_file), &network);
3513 if (r < 0) {
3514 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3515 goto network_file_fail;
3516 }
3517
7d342c03 3518 r = network_apply(network, link);
c4a03a56
TG		 3519 if (r < 0)
3520 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3521 }
3522
3523network_file_fail:
3524
1f68f772
ZJS		 3525 for (const char *p = addresses; p; ) {
3526 _cleanup_free_ char *address_str = NULL;
3527 char *prefixlen_str;
3528 int family;
3529 unsigned char prefixlen;
c4a03a56 3530
1f68f772
ZJS		 3531 r = extract_first_word(&p, &address_str, NULL, 0);
3532 if (r < 0)
3533 log_link_warning_errno(link, r, "failed to parse ADDRESSES: %m");
3534 if (r <= 0)
3535 break;
c4a03a56 3536
1f68f772
ZJS		 3537 prefixlen_str = strchr(address_str, '/');
3538 if (!prefixlen_str) {
3539 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
3540 continue;
3541 }
3542 *prefixlen_str++ = '\0';
c4a03a56 3543
1f68f772
ZJS		 3544 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3545 if (r != 1) {
3546 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3547 continue;
3548 }
c4a03a56 3549
1f68f772
ZJS		 3550 r = in_addr_from_string_auto(address_str, &family, &address);
3551 if (r < 0) {
3552 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
3553 continue;
c4a03a56 3554 }
c4a03a56 3555
1f68f772
ZJS		 3556 r = address_add(link, family, &address, prefixlen, NULL);
3557 if (r < 0)
3558 return log_link_error_errno(link, r, "Failed to add address: %m");
3559 }
74544b4e 3560
1f68f772
ZJS		 3561 for (const char *p = routes; p; ) {
3562 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
3563 _cleanup_(route_freep) Route *tmp = NULL;
3564 _cleanup_free_ char *route_str = NULL;
3565 char *prefixlen_str;
3566 Route *route;
f703cc2c 3567
1f68f772
ZJS		 3568 r = extract_first_word(&p, &route_str, NULL, 0);
3569 if (r < 0)
3570 log_link_debug_errno(link, r, "failed to parse ROUTES: %m");
3571 if (r <= 0)
3572 break;
c598ac76 3573
1f68f772
ZJS		 3574 prefixlen_str = strchr(route_str, '/');
3575 if (!prefixlen_str) {
3576 log_link_debug(link, "Failed to parse route %s", route_str);
3577 continue;
3578 }
3579 *prefixlen_str++ = '\0';
f703cc2c 3580
1f68f772
ZJS		 3581 r = route_new(&tmp);
3582 if (r < 0)
3583 return log_oom();
f703cc2c 3584
1f68f772
ZJS		 3585 r = sscanf(prefixlen_str,
3586 "%hhu/%hhu/%"SCNu32"/%"PRIu32"/"USEC_FMT,
3587 &tmp->dst_prefixlen,
3588 &tmp->tos,
3589 &tmp->priority,
3590 &tmp->table,
3591 &tmp->lifetime);
3592 if (r != 5) {
3593 log_link_debug(link,
3594 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3595 prefixlen_str);
3596 continue;
3597 }
f1368755 3598
1f68f772
ZJS		 3599 r = in_addr_from_string_auto(route_str, &tmp->family, &tmp->dst);
3600 if (r < 0) {
3601 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
3602 continue;
3603 }
f703cc2c 3604
1f68f772
ZJS		 3605 r = route_add(link, tmp, &route);
3606 if (r < 0)
3607 return log_link_error_errno(link, r, "Failed to add route: %m");
f703cc2c 3608
1f68f772
ZJS		 3609 if (route->lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
3610 r = sd_event_add_time(link->manager->event, &expire,
3611 clock_boottime_or_monotonic(),
3612 route->lifetime, 0, route_expire_handler, route);
f703cc2c 3613 if (r < 0)
1f68f772 3614 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
f703cc2c 3615 }
1f68f772
ZJS		 3616
3617 sd_event_source_unref(route->expire);
3618 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3619 }
3620
0bc70f1d
TG		 3621 if (dhcp4_address) {
3622 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3623 if (r < 0) {
b68d26b8 3624 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3625 goto dhcp4_address_fail;
3626 }
3627
b1c626f6 3628 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3629 if (r < 0)
b68d26b8 3630 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d 3631
1b43e246
DS		 3632 r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0);
3633 if (r < 0)
3634 return log_link_error_errno(link, r, "Failed to attach DHCPv4 event: %m");
3635
0bc70f1d
TG		 3636 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3637 if (r < 0)
b68d26b8 3638 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3639 }
3640
3641dhcp4_address_fail:
3642
3643 if (ipv4ll_address) {
3644 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3645 if (r < 0) {
b68d26b8 3646 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3647 goto ipv4ll_address_fail;
3648 }
3649
3650 r = sd_ipv4ll_new(&link->ipv4ll);
3651 if (r < 0)
b68d26b8 3652 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d 3653
1b43e246
DS		 3654 r = sd_ipv4ll_attach_event(link->ipv4ll, NULL, 0);
3655 if (r < 0)
3656 return log_link_error_errno(link, r, "Failed to attach IPv4LL event: %m");
3657
0bc70f1d
TG		 3658 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3659 if (r < 0)
b68d26b8 3660 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3661 }
3662
3663ipv4ll_address_fail:
3664
c4a03a56
TG		 3665 return 0;
3666}
3667
1c4baffc 3668int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3669 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3670 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3671 Link *link;
5a937ea2 3672 int r;
505f8da7
TG		 3673
3674 assert(m);
fbbeb65a 3675 assert(m->rtnl);
505f8da7
TG		 3676 assert(message);
3677 assert(ret);
3678
3679 r = link_new(m, message, ret);
3680 if (r < 0)
3681 return r;
3682
3683 link = *ret;
3684
6a7a4e4d 3685 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3686
c4a03a56
TG		 3687 r = link_load(link);
3688 if (r < 0)
3689 return r;
3690
bf331d87
YW		 3691 if (path_is_read_only_fs("/sys") <= 0) {
3692 /* udev should be around */
ae06ab10 3693 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3694 r = sd_device_new_from_device_id(&device, ifindex_str);
3695 if (r < 0) {
4d59e14f
YW		 3696 log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m");
3697 return 0;
5c416fc4 3698 }
505f8da7 3699
5a937ea2 3700 r = sd_device_get_is_initialized(device);
51517f9e 3701 if (r < 0) {
bf331d87 3702 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 3703 goto failed;
3704 }
5a937ea2 3705 if (r == 0) {
505f8da7 3706 /* not yet ready */
79008bdd 3707 log_link_debug(link, "link pending udev initialization...");
505f8da7 3708 return 0;
3c4cb064 3709 }
505f8da7 3710
299ad32d
YW		 3711 r = device_is_renaming(device);
3712 if (r < 0) {
bf331d87 3713 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 3714 goto failed;
3715 }
3716 if (r > 0) {
bf331d87 3717 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 3718 return 0;
3719 }
3720
4f561e8e
TG		 3721 r = link_initialized(link, device);
3722 if (r < 0)
5c416fc4 3723 goto failed;
4f561e8e 3724 } else {
e6bf7774 3725 r = link_initialized_and_synced(link);
4f561e8e 3726 if (r < 0)
5c416fc4 3727 goto failed;
4f561e8e 3728 }
505f8da7 3729
a748b692 3730 return 0;
5c416fc4
TG		 3731failed:
3732 link_enter_failed(link);
3733 return r;
a748b692
TG		 3734}
3735
c601ebf7 3736int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3737 int r;
3738
3739 assert(link);
3740
3741 log_link_info(link, "Gained IPv6LL");
3742
c601ebf7 3743 link->ipv6ll_address = *address;
e7ab854c
TG		 3744 link_check_ready(link);
3745
b9ea3d2e 3746 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3747 r = link_acquire_ipv6_conf(link);
3748 if (r < 0) {
3749 link_enter_failed(link);
3750 return r;
3751 }
3752 }
3753
3754 return 0;
3755}
3756
9c0a72f9
TG		 3757static int link_carrier_gained(Link *link) {
3758 int r;
3759
3760 assert(link);
3761
0894cfe4 3762 r = wifi_get_info(link);
8d968fdd
YW		 3763 if (r < 0)
3764 return r;
3765 if (r > 0) {
572b21d9
YW		 3766 r = link_reconfigure_internal(link, NULL, false);
3767 if (r < 0) {
3768 link_enter_failed(link);
8d968fdd 3769 return r;
572b21d9 3770 }
8d968fdd
YW		 3771 }
3772
b9ea3d2e 3773 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3774 r = link_acquire_conf(link);
3775 if (r < 0) {
3776 link_enter_failed(link);
3777 return r;
3778 }
6fc25497 3779
b425c3ae 3780 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 3781 r = link_request_set_addresses(link);
6fc25497
SS		 3782 if (r < 0)
3783 return r;
9c0a72f9
TG		 3784 }
3785
0d4ad91d
AR		 3786 r = link_handle_bound_by_list(link);
3787 if (r < 0)
3788 return r;
3789
9c0a72f9
TG		 3790 return 0;
3791}
3792
3793static int link_carrier_lost(Link *link) {
3794 int r;
3795
3796 assert(link);
3797
25e992ba 3798 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3799 return 0;
3800
fbdb6605 3801 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3802 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3803 * configuration and stop the clients as well. */
97e7fb39
SS		 3804 if (link->setting_mtu)
3805 return 0;
3806
95355a28 3807 r = link_stop_clients(link, false);
9c0a72f9
TG		 3808 if (r < 0) {
3809 link_enter_failed(link);
3810 return r;
3811 }
3812
28464ae0
SS		 3813 if (link_dhcp4_server_enabled(link))
3814 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3815
3104883d
SS		 3816 r = link_drop_config(link);
3817 if (r < 0)
3818 return r;
3819
2c7b826d 3820 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
f258e948 3821 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3822 r = link_drop_foreign_config(link);
3823 if (r < 0)
3824 return r;
3825 }
3104883d 3826
0d4ad91d
AR		 3827 r = link_handle_bound_by_list(link);
3828 if (r < 0)
3829 return r;
3830
9c0a72f9
TG		 3831 return 0;
3832}
3833
3834int link_carrier_reset(Link *link) {
3835 int r;
3836
3837 assert(link);
3838
3839 if (link_has_carrier(link)) {
3840 r = link_carrier_lost(link);
3841 if (r < 0)
3842 return r;
3843
3844 r = link_carrier_gained(link);
3845 if (r < 0)
3846 return r;
3847
6a7a4e4d 3848 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3849 }
3850
3851 return 0;
3852}
3853
d236718c
DS		 3854/* This is called every time an interface admin state changes to up;
3855 * specifically, when IFF_UP flag changes from unset to set */
3856static int link_admin_state_up(Link *link) {
3857 int r;
3858
3859 /* We set the ipv6 mtu after the device mtu, but the kernel resets
3860 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
3861 * ipv6_mtu_set prevents this from trying to set it too early before
3862 * the link->network has been setup; we only need to reset it
3863 * here if we've already set it during normal initialization. */
3864 if (link->ipv6_mtu_set) {
3865 r = link_set_ipv6_mtu(link);
3866 if (r < 0)
3867 return r;
3868 }
3869
3870 return 0;
3871}
3872
1c4baffc 3873int link_update(Link *link, sd_netlink_message *m) {
572b21d9 3874 _cleanup_strv_free_ char **s = NULL;
c49b33ac 3875 struct ether_addr mac;
ca4e095a 3876 const char *ifname;
afe7fd56 3877 uint32_t mtu;
d236718c 3878 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 3879 int old_master, r;
22936833 3880
dd3efc09 3881 assert(link);
b8941f74 3882 assert(link->ifname);
22936833
TG		 3883 assert(m);
3884
7619683b 3885 if (link->state == LINK_STATE_LINGER) {
5238e957 3886 log_link_info(link, "Link re-added");
289e6774 3887 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3888
3889 r = link_new_carrier_maps(link);
3890 if (r < 0)
3891 return r;
7619683b
TG		 3892 }
3893
1c4baffc 3894 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3895 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3896 Manager *manager = link->manager;
b8941f74 3897
30de2b89 3898 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3899
30de2b89
YW		 3900 link_drop(link);
3901 r = link_add(manager, m, &link);
3902 if (r < 0)
3903 return r;
b8941f74
TG		 3904 }
3905
572b21d9
YW		 3906 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3907 if (r >= 0)
3908 strv_free_and_replace(link->alternative_names, s);
3909
1c4baffc 3910 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3911 if (r >= 0 && mtu > 0) {
3912 link->mtu = mtu;
4e964aa0 3913 if (link->original_mtu == 0) {
afe7fd56 3914 link->original_mtu = mtu;
6a7a4e4d 3915 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3916 }
3917
3918 if (link->dhcp_client) {
3c9b8860
TG		 3919 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3920 link->mtu);
fc95c359
YW		 3921 if (r < 0)
3922 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3923 }
7465dd22
PF		 3924
3925 if (link->radv) {
3926 r = sd_radv_set_mtu(link->radv, link->mtu);
3927 if (r < 0)
3928 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3929 }
9842de0d 3930 }
69629de9 3931
e9189a1f
TG		 3932 /* The kernel may broadcast NEWLINK messages without the MAC address
3933 set, simply ignore them. */
1c4baffc 3934 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3935 if (r >= 0) {
3c9b8860
TG		 3936 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3937 ETH_ALEN)) {
c49b33ac 3938
3c9b8860
TG		 3939 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3940 ETH_ALEN);
c49b33ac 3941
79008bdd 3942 log_link_debug(link, "MAC address: "
20861203
TG		 3943 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3944 mac.ether_addr_octet[0],
3945 mac.ether_addr_octet[1],
3946 mac.ether_addr_octet[2],
3947 mac.ether_addr_octet[3],
3948 mac.ether_addr_octet[4],
3949 mac.ether_addr_octet[5]);
c49b33ac 3950
20861203
TG		 3951 if (link->ipv4ll) {
3952 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3953 if (r < 0)
3954 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3955 }
c49b33ac 3956
20861203 3957 if (link->dhcp_client) {
3c9b8860 3958 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3959 (const uint8_t *) &link->mac,
3960 sizeof (link->mac),
3961 ARPHRD_ETHER);
6a7a4e4d
LP		 3962 if (r < 0)
3963 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3964
fff1f40c
YW		 3965 r = dhcp4_set_client_identifier(link);
3966 if (r < 0)
3967 return r;
c49b33ac 3968 }
4138fb2c
PF		 3969
3970 if (link->dhcp6_client) {
f24648a6 3971 const DUID* duid = link_get_duid(link);
8341a5c3 3972
4138fb2c 3973 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3974 (const uint8_t *) &link->mac,
3975 sizeof (link->mac),
3976 ARPHRD_ETHER);
6a7a4e4d
LP		 3977 if (r < 0)
3978 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3979
8217ed5e
TH		 3980 if (link->network->iaid_set) {
3981 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3982 link->network->iaid);
3983 if (r < 0)
3984 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3985 }
413708d1 3986
8341a5c3
ZJS		 3987 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3988 duid->type,
3989 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3990 duid->raw_data_len);
413708d1
VK		 3991 if (r < 0)
3992 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3993 }
7465dd22
PF		 3994
3995 if (link->radv) {
3996 r = sd_radv_set_mac(link->radv, &link->mac);
3997 if (r < 0)
3998 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3999 }
420d2058
SS		 4000
4001 if (link->ndisc) {
4002 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
4003 if (r < 0)
4004 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
4005 }
c49b33ac 4006 }
4f882b2a
TG		 4007 }
4008
bb262ef0
YW		 4009 old_master = link->master_ifindex;
4010 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
4011
d236718c 4012 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 4013 had_carrier = link_has_carrier(link);
4014
bb262ef0 4015 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 4016 if (r < 0)
4017 return r;
4018
d236718c
DS		 4019 if (!link_was_admin_up && (link->flags & IFF_UP)) {
4020 log_link_info(link, "Link UP");
4021
4022 r = link_admin_state_up(link);
4023 if (r < 0)
4024 return r;
4025 } else if (link_was_admin_up && !(link->flags & IFF_UP))
4026 log_link_info(link, "Link DOWN");
4027
273eec24
LP		 4028 r = link_update_lldp(link);
4029 if (r < 0)
4030 return r;
4031
a61bb41c
TG		 4032 carrier_gained = !had_carrier && link_has_carrier(link);
4033 carrier_lost = had_carrier && !link_has_carrier(link);
4034
4035 if (carrier_gained) {
6a7a4e4d 4036 log_link_info(link, "Gained carrier");
a61bb41c 4037
9c0a72f9
TG		 4038 r = link_carrier_gained(link);
4039 if (r < 0)
4040 return r;
a61bb41c 4041 } else if (carrier_lost) {
6a7a4e4d 4042 log_link_info(link, "Lost carrier");
a61bb41c 4043
9c0a72f9
TG		 4044 r = link_carrier_lost(link);
4045 if (r < 0)
a61bb41c 4046 return r;
a61bb41c
TG		 4047 }
4048
4049 return 0;
dd3efc09 4050}
fe8db0c5 4051
b295beea
LP		 4052static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
4053 bool space = false;
4054 Iterator i;
4055 Link *link;
4056
4057 assert(f);
4058 assert(prefix);
4059
4060 if (hashmap_isempty(h))
4061 return;
4062
0d536673 4063 fputs(prefix, f);
b295beea
LP		 4064 HASHMAP_FOREACH(link, h, i) {
4065 if (space)
0d536673 4066 fputc(' ', f);
b295beea
LP		 4067
4068 fprintf(f, "%i", link->ifindex);
4069 space = true;
4070 }
4071
0d536673 4072 fputc('\n', f);
b295beea
LP		 4073}
4074
15761549 4075static void link_save_dns(FILE *f, struct in_addr_data *dns, unsigned n_dns, bool *space) {
dddc8d1e 4076 for (unsigned j = 0; j < n_dns; j++) {
15761549 4077 _cleanup_free_ char *b = NULL;
dddc8d1e 4078 int r;
15761549
YW		 4079
4080 r = in_addr_to_string(dns[j].family, &dns[j].address, &b);
4081 if (r < 0) {
4082 log_debug_errno(r, "Failed to format address, ignoring: %m");
4083 continue;
4084 }
4085
4086 if (*space)
4087 fputc(' ', f);
4088 fputs(b, f);
4089 *space = true;
4090 }
4091}
4092
d5e172d2
ZJS		 4093static void serialize_addresses(
4094 FILE *f,
4095 const char *lvalue,
4096 bool *space,
4097 char **addresses,
4098 sd_dhcp_lease *lease,
4099 bool conditional,
ddb82ec2 4100 sd_dhcp_lease_server_type what,
d5e172d2
ZJS		 4101 sd_dhcp6_lease *lease6,
4102 bool conditional6,
4103 int (*lease6_get_addr)(sd_dhcp6_lease*, const struct in6_addr**),
4104 int (*lease6_get_fqdn)(sd_dhcp6_lease*, char ***)) {
4105 int r;
4106
4107 bool _space = false;
4108 if (!space)
4109 space = &_space;
4110
4111 if (lvalue)
4112 fprintf(f, "%s=", lvalue);
4113 fputstrv(f, addresses, NULL, space);
4114
4115 if (lease && conditional) {
4116 const struct in_addr *lease_addresses;
4117
4118 r = sd_dhcp_lease_get_servers(lease, what, &lease_addresses);
4119 if (r > 0)
d8bff5cc 4120 serialize_in_addrs(f, lease_addresses, r, space, in4_addr_is_non_local);
d5e172d2
ZJS		 4121 }
4122
4123 if (lease6 && conditional6 && lease6_get_addr) {
4124 const struct in6_addr *in6_addrs;
4125
4126 r = lease6_get_addr(lease6, &in6_addrs);
d8bff5cc
ZJS		 4127 if (r > 0)
4128 serialize_in6_addrs(f, in6_addrs, r, space);
d5e172d2
ZJS		 4129 }
4130
4131 if (lease6 && conditional6 && lease6_get_fqdn) {
4132 char **in6_hosts;
4133
4134 r = lease6_get_fqdn(lease6, &in6_hosts);
4135 if (r > 0)
4136 fputstrv(f, in6_hosts, NULL, space);
4137 }
4138
4139 if (lvalue)
4140 fputc('\n', f);
4141}
4142
fe8db0c5 4143int link_save(Link *link) {
d361b373 4144 const char *admin_state, *oper_state, *carrier_state, *address_state;
68a8723c 4145 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 4146 _cleanup_fclose_ FILE *f = NULL;
c1eb9872 4147 Route *route;
18d8a2cf 4148 Address *a;
e7780c8d 4149 Iterator i;
fe8db0c5
TG		 4150 int r;
4151
4152 assert(link);
4153 assert(link->state_file);
68a8723c 4154 assert(link->lease_file);
bbf7c048
TG		 4155 assert(link->manager);
4156
370e9930 4157 if (link->state == LINK_STATE_LINGER) {
6990fb6b 4158 (void) unlink(link->state_file);
370e9930
TG		 4159 return 0;
4160 }
4161
34437b4f
LP		 4162 link_lldp_save(link);
4163
deb2e523
TG		 4164 admin_state = link_state_to_string(link->state);
4165 assert(admin_state);
4166
e375dcde
TG		 4167 oper_state = link_operstate_to_string(link->operstate);
4168 assert(oper_state);
deb2e523 4169
ac999bf0
YW		 4170 carrier_state = link_carrier_state_to_string(link->carrier_state);
4171 assert(carrier_state);
4172
4173 address_state = link_address_state_to_string(link->address_state);
4174 assert(address_state);
4175
fe8db0c5
TG		 4176 r = fopen_temporary(link->state_file, &f, &temp_path);
4177 if (r < 0)
6a7a4e4d 4178 goto fail;
fe8db0c5 4179
5512a963 4180 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 4181
4182 fprintf(f,
4183 "# This is private data. Do not parse.\n"
deb2e523 4184 "ADMIN_STATE=%s\n"
ac999bf0
YW		 4185 "OPER_STATE=%s\n"
4186 "CARRIER_STATE=%s\n"
4187 "ADDRESS_STATE=%s\n",
4188 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 4189
bcb7a07e 4190 if (link->network) {
fe0e16db
YW		 4191 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
4192 const char *dhcp_domainname = NULL, *p;
07bdc70d 4193 sd_dhcp6_lease *dhcp6_lease = NULL;
fe0e16db 4194 bool space;
07bdc70d 4195
c1a38904
MTL		 4196 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
4197 yes_no(link->network->required_for_online));
4198
d5e172d2
ZJS		 4199 LinkOperationalStateRange st = link->network->required_operstate_for_online;
4200 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s%s%s\n",
4201 strempty(link_operstate_to_string(st.min)),
4202 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? ":" : "",
4203 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? strempty(link_operstate_to_string(st.max)) : "");
4ac77d63 4204
07bdc70d 4205 if (link->dhcp6_client) {
4058d339
TG		 4206 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
4207 if (r < 0 && r != -ENOMSG)
2206aa5c 4208 log_link_debug_errno(link, r, "Failed to get DHCPv6 lease: %m");
07bdc70d 4209 }
b0e39c82 4210
adc5b2e2
TG		 4211 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
4212
d5e172d2
ZJS		 4213 /************************************************************/
4214
0d536673 4215 fputs("DNS=", f);
ea352b40 4216 space = false;
15761549
YW		 4217 if (link->n_dns != (unsigned) -1)
4218 link_save_dns(f, link->dns, link->n_dns, &space);
4219 else
4220 link_save_dns(f, link->network->dns, link->network->n_dns, &space);
d5314fff 4221
d5e172d2
ZJS		 4222 serialize_addresses(f, NULL, &space,
4223 NULL,
4224 link->dhcp_lease,
4225 link->network->dhcp_use_dns,
ddb82ec2 4226 SD_DHCP_LEASE_DNS,
d5e172d2
ZJS		 4227 dhcp6_lease,
4228 link->network->dhcp6_use_dns,
4229 sd_dhcp6_lease_get_dns,
4230 NULL);
1e7a0e21
LP		 4231
4232 /* Make sure to flush out old entries before we use the NDISC data */
4233 ndisc_vacuum(link);
4234
b296797f 4235 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 4236 NDiscRDNSS *dd;
4237
d8bff5cc
ZJS		 4238 SET_FOREACH(dd, link->ndisc_rdnss, i)
4239 serialize_in6_addrs(f, &dd->address, 1, &space);
299d578f
SS		 4240 }
4241
4242 fputc('\n', f);
4243
d5e172d2
ZJS		 4244 /************************************************************/
4245
4246 serialize_addresses(f, "NTP", NULL,
4247 link->ntp ?: link->network->ntp,
4248 link->dhcp_lease,
4249 link->network->dhcp_use_ntp,
ddb82ec2 4250 SD_DHCP_LEASE_NTP,
d5e172d2
ZJS		 4251 dhcp6_lease,
4252 link->network->dhcp6_use_ntp,
4253 sd_dhcp6_lease_get_ntp_addrs,
4254 sd_dhcp6_lease_get_ntp_fqdn);
4255
4256 serialize_addresses(f, "SIP", NULL,
2a71d57f 4257 NULL,
d5e172d2
ZJS		 4258 link->dhcp_lease,
4259 link->network->dhcp_use_sip,
ddb82ec2 4260 SD_DHCP_LEASE_SIP,
2a71d57f 4261 NULL, false, NULL, NULL);
d5e172d2
ZJS		 4262
4263 /************************************************************/
bd8f6538 4264
b2a81c0b 4265 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 4266 if (link->dhcp_lease) {
b2a81c0b 4267 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 4268 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
4269 }
b2a81c0b
LP		 4270 if (dhcp6_lease)
4271 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 4272 }
4273
fe0e16db
YW		 4274 fputs("DOMAINS=", f);
4275 space = false;
15761549 4276 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains, i)
fe0e16db 4277 fputs_with_space(f, p, NULL, &space);
07bdc70d 4278
1e7a0e21 4279 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP		 4280 if (dhcp_domainname)
4281 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4282 if (dhcp_domains)
4283 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4284 if (dhcp6_domains)
4285 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 4286 }
4287
4288 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
4289 NDiscDNSSL *dd;
1e7a0e21
LP		 4290
4291 SET_FOREACH(dd, link->ndisc_dnssl, i)
4292 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4293 }
b2a81c0b 4294
0d536673 4295 fputc('\n', f);
6192b846 4296
d5e172d2
ZJS		 4297 /************************************************************/
4298
fe0e16db
YW		 4299 fputs("ROUTE_DOMAINS=", f);
4300 space = false;
15761549 4301 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains, i)
fe0e16db 4302 fputs_with_space(f, p, NULL, &space);
b2a81c0b 4303
1e7a0e21 4304 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
1e7a0e21
LP		 4305 if (dhcp_domainname)
4306 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4307 if (dhcp_domains)
4308 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4309 if (dhcp6_domains)
4310 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 4311 }
4312
4313 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
4314 NDiscDNSSL *dd;
1e7a0e21
LP		 4315
4316 SET_FOREACH(dd, link->ndisc_dnssl, i)
4317 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4318 }
b2a81c0b 4319
0d536673 4320 fputc('\n', f);
67272d15 4321
d5e172d2
ZJS		 4322 /************************************************************/
4323
3c9b8860 4324 fprintf(f, "LLMNR=%s\n",
15761549 4325 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
d5e172d2
ZJS		 4326
4327 /************************************************************/
4328
aaa297d4 4329 fprintf(f, "MDNS=%s\n",
15761549 4330 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
15761549 4331
d5e172d2
ZJS		 4332 /************************************************************/
4333
4334 int dns_default_route =
4335 link->dns_default_route >= 0 ? link->dns_default_route :
4336 link->network->dns_default_route;
4337 if (dns_default_route >= 0)
4338 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(dns_default_route));
4339
4340 /************************************************************/
4341
4342 DnsOverTlsMode dns_over_tls_mode =
4343 link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID ? link->dns_over_tls_mode :
4344 link->network->dns_over_tls_mode;
4345 if (dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
4346 fprintf(f, "DNS_OVER_TLS=%s\n", dns_over_tls_mode_to_string(dns_over_tls_mode));
4347
4348 /************************************************************/
4349
4350 DnssecMode dnssec_mode =
4351 link->dnssec_mode != _DNSSEC_MODE_INVALID ? link->dnssec_mode :
4352 link->network->dnssec_mode;
4353 if (dnssec_mode != _DNSSEC_MODE_INVALID)
4354 fprintf(f, "DNSSEC=%s\n", dnssec_mode_to_string(dnssec_mode));
4355
4356 /************************************************************/
4357
4358 Set *nta_anchors = link->dnssec_negative_trust_anchors;
4359 if (set_isempty(nta_anchors))
4360 nta_anchors = link->network->dnssec_negative_trust_anchors;
4361
4362 if (!set_isempty(nta_anchors)) {
8a516214
LP		 4363 const char *n;
4364
0d536673 4365 fputs("DNSSEC_NTA=", f);
8a516214 4366 space = false;
d5e172d2 4367 SET_FOREACH(n, nta_anchors, i)
d390f8ef 4368 fputs_with_space(f, n, NULL, &space);
0d536673 4369 fputc('\n', f);
8a516214
LP		 4370 }
4371
d5e172d2
ZJS		 4372 /************************************************************/
4373
0d536673 4374 fputs("ADDRESSES=", f);
e7780c8d
TG		 4375 space = false;
4376 SET_FOREACH(a, link->addresses, i) {
4377 _cleanup_free_ char *address_str = NULL;
4378
4379 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
4380 if (r < 0)
4381 goto fail;
4382
e7780c8d
TG		 4383 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
4384 space = true;
4385 }
0d536673 4386 fputc('\n', f);
c1eb9872 4387
d5e172d2
ZJS		 4388 /************************************************************/
4389
0d536673 4390 fputs("ROUTES=", f);
c1eb9872
TG		 4391 space = false;
4392 SET_FOREACH(route, link->routes, i) {
4393 _cleanup_free_ char *route_str = NULL;
4394
4395 r = in_addr_to_string(route->family, &route->dst, &route_str);
4396 if (r < 0)
4397 goto fail;
4398
ecc3f340
ZJS		 4399 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
4400 space ? " " : "", route_str,
f833694d 4401 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 4402 space = true;
4403 }
4404
0d536673 4405 fputc('\n', f);
bcb7a07e 4406 }
7374f9d8 4407
b295beea
LP		 4408 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
4409 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 4410
8eb9058d 4411 if (link->dhcp_lease) {
bd91b83e 4412 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 4413 if (r < 0)
c2d6bd61 4414 goto fail;
fe8db0c5 4415
7374f9d8 4416 fprintf(f,
b0e39c82
TG		 4417 "DHCP_LEASE=%s\n",
4418 link->lease_file);
deb2e523 4419 } else
6990fb6b 4420 (void) unlink(link->lease_file);
fe8db0c5 4421
0bc70f1d
TG		 4422 if (link->ipv4ll) {
4423 struct in_addr address;
4424
4425 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
4426 if (r >= 0) {
0d536673 4427 fputs("IPV4LL_ADDRESS=", f);
072320ea 4428 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 4429 fputc('\n', f);
0bc70f1d
TG		 4430 }
4431 }
4432
7e738e7b
SS		 4433 if (link->dhcp6_client) {
4434 _cleanup_free_ char *duid = NULL;
4435 uint32_t iaid;
4436
4437 r = sd_dhcp6_client_get_iaid(link->dhcp6_client, &iaid);
4438 if (r >= 0)
4439 fprintf(f, "DHCP6_CLIENT_IAID=0x%x\n", iaid);
4440
4441 r = sd_dhcp6_client_duid_as_string(link->dhcp6_client, &duid);
4442 if (r >= 0)
4443 fprintf(f, "DHCP6_CLIENT_DUID=%s\n", duid);
4444 }
18d8a2cf 4445
c2d6bd61
LP		 4446 r = fflush_and_check(f);
4447 if (r < 0)
4448 goto fail;
fe8db0c5 4449
c2d6bd61 4450 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 4451 r = -errno;
c2d6bd61 4452 goto fail;
fe8db0c5
TG		 4453 }
4454
c2d6bd61 4455 return 0;
dacd6cee 4456
c2d6bd61 4457fail:
6a7a4e4d 4458 (void) unlink(link->state_file);
6a7a4e4d
LP		 4459 if (temp_path)
4460 (void) unlink(temp_path);
4461
dacd6cee 4462 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 4463}
4464
84de38c5
TG		 4465/* The serialized state in /run is no longer up-to-date. */
4466void link_dirty(Link *link) {
4467 int r;
4468
4469 assert(link);
4470
0c241a37
SS		 4471 /* mark manager dirty as link is dirty */
4472 manager_dirty(link->manager);
4473
de7fef4b 4474 r = set_ensure_put(&link->manager->dirty_links, NULL, link);
0c241a37 4475 if (r <= 0)
de7fef4b 4476 /* Ignore allocation errors and don't take another ref if the link was already dirty */
84de38c5 4477 return;
84de38c5
TG		 4478 link_ref(link);
4479}
4480
4481/* The serialized state in /run is up-to-date */
4482void link_clean(Link *link) {
4483 assert(link);
4484 assert(link->manager);
4485
1046bf9b 4486 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4487}
4488
fe8db0c5 4489static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4490 [LINK_STATE_PENDING] = "pending",
bd08ce56 4491 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 4492 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 4493 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4494 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4495 [LINK_STATE_FAILED] = "failed",
370e9930 4496 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4497};
4498
4499DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
5ecb131d
YW		 4500
4501int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg) {
4502 const char *err_msg = NULL;
4503
4504 (void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg);
ab119e63
YW		 4505 return log_link_full(link, level, err,
4506 "%s: %s%s%s%m",
4507 msg,
4508 strempty(err_msg),
4509 err_msg && !endswith(err_msg, ".") ? "." : "",
4510 err_msg ? " " : "");
5ecb131d 4511}
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