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test-network: wait for bridge slave to be enslaved in test_bridge_ignore_carrier_loss...
[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>
4cc7a82c 5#include <unistd.h>
f579559b 6
b5efdb8a 7#include "alloc-util.h"
1346b1f0 8#include "bus-util.h"
27dfc982 9#include "dhcp-identifier.h"
bd91b83e 10#include "dhcp-lease-internal.h"
686d13b9 11#include "env-file.h"
3ffd4af2 12#include "fd-util.h"
cf1d700d 13#include "fileio.h"
ef118d00 14#include "missing_network.h"
4799f19e 15#include "netdev/bond.h"
9a81f119 16#include "netdev/bridge.h"
f410d463 17#include "netdev/ipvlan.h"
bdb9f580 18#include "netdev/vrf.h"
cf1d700d 19#include "netlink-util.h"
c6f7c917 20#include "network-internal.h"
3ddcbeea 21#include "networkd-can.h"
a0e5c15d 22#include "networkd-ipv6-proxy-ndp.h"
8e1ad1ea 23#include "networkd-lldp-tx.h"
23f53b99 24#include "networkd-manager.h"
1e7a0e21 25#include "networkd-ndisc.h"
e4a71bf3 26#include "networkd-neighbor.h"
7465dd22 27#include "networkd-radv.h"
bce67bbe 28#include "networkd-routing-policy-rule.h"
cf1d700d
TG		 29#include "set.h"
30#include "socket-util.h"
15a5e950 31#include "stdio-util.h"
8b43440b 32#include "string-table.h"
51517f9e 33#include "strv.h"
62e021a9 34#include "sysctl-util.h"
e4de7287 35#include "tmpfile-util.h"
299ad32d 36#include "udev-util.h"
cf1d700d
TG		 37#include "util.h"
38#include "virt.h"
fc2f9534 39
bdb9f580
YW		 40uint32_t link_get_vrf_table(Link *link) {
41 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
42}
43
44uint32_t link_get_dhcp_route_table(Link *link) {
45 /* When the interface is part of an VRF use the VRFs routing table, unless
46 * another table is explicitly specified. */
47 if (link->network->dhcp_route_table_set)
48 return link->network->dhcp_route_table;
49 return link_get_vrf_table(link);
50}
51
52uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
53 if (link->network->ipv6_accept_ra_route_table_set)
54 return link->network->ipv6_accept_ra_route_table;
55 return link_get_vrf_table(link);
56}
57
f24648a6
YW		 58DUID* link_get_duid(Link *link) {
59 if (link->network->duid.type != _DUID_TYPE_INVALID)
60 return &link->network->duid;
61 else
62 return &link->manager->duid;
63}
64
b9d74c40
LP		 65static bool link_dhcp6_enabled(Link *link) {
66 assert(link);
67
fa709992
LP		 68 if (!socket_ipv6_is_supported())
69 return false;
70
78c958f8
TG		 71 if (link->flags & IFF_LOOPBACK)
72 return false;
73
74 if (!link->network)
75 return false;
76
f2bfcdb9
YW		 77 if (link->network->bond)
78 return false;
79
af9ba57a
YW		 80 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
81 return false;
82
4b600505
YW		 83 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
84 return false;
85
e0ee46f2 86 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 87}
88
b9d74c40
LP		 89static bool link_dhcp4_enabled(Link *link) {
90 assert(link);
91
78c958f8
TG		 92 if (link->flags & IFF_LOOPBACK)
93 return false;
94
95 if (!link->network)
96 return false;
97
f2bfcdb9
YW		 98 if (link->network->bond)
99 return false;
100
af9ba57a
YW		 101 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
102 return false;
103
e0ee46f2 104 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 105}
106
b9d74c40
LP		 107static bool link_dhcp4_server_enabled(Link *link) {
108 assert(link);
109
78c958f8
TG		 110 if (link->flags & IFF_LOOPBACK)
111 return false;
112
113 if (!link->network)
114 return false;
115
f2bfcdb9
YW		 116 if (link->network->bond)
117 return false;
118
af9ba57a
YW		 119 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
120 return false;
121
78c958f8
TG		 122 return link->network->dhcp_server;
123}
124
8bc17bb3 125bool link_ipv4ll_enabled(Link *link) {
b9d74c40
LP		 126 assert(link);
127
78c958f8
TG		 128 if (link->flags & IFF_LOOPBACK)
129 return false;
130
131 if (!link->network)
132 return false;
133
af9ba57a 134 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "ip6gre", "ip6tnl", "sit", "vti", "vti6", "can", "vcan"))
a8f5bba6
JD		 135 return false;
136
f410d463
YW		 137 /* L3 or L3S mode do not support ARP. */
138 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
139 return false;
140
f2bfcdb9
YW		 141 if (link->network->bond)
142 return false;
143
e0ee46f2 144 return link->network->link_local & ADDRESS_FAMILY_IPV4;
d0d6a4cd
TG		 145}
146
8bc17bb3
SS		 147bool link_ipv4ll_fallback_enabled(Link *link) {
148 assert(link);
149
150 if (link->flags & IFF_LOOPBACK)
151 return false;
152
153 if (!link->network)
154 return false;
155
af9ba57a 156 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "ip6gre", "ip6tnl", "sit", "vti", "vti6", "can", "vcan"))
8bc17bb3
SS		 157 return false;
158
f410d463
YW		 159 /* L3 or L3S mode do not support ARP. */
160 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
161 return false;
162
8bc17bb3
SS		 163 if (link->network->bond)
164 return false;
165
166 return link->network->link_local & ADDRESS_FAMILY_FALLBACK_IPV4;
167}
168
b9d74c40
LP		 169static bool link_ipv6ll_enabled(Link *link) {
170 assert(link);
171
fa709992
LP		 172 if (!socket_ipv6_is_supported())
173 return false;
174
d0d6a4cd
TG		 175 if (link->flags & IFF_LOOPBACK)
176 return false;
177
178 if (!link->network)
179 return false;
180
af9ba57a 181 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "can", "vcan"))
a8f5bba6
JD		 182 return false;
183
f2bfcdb9
YW		 184 if (link->network->bond)
185 return false;
186
4b600505
YW		 187 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
188 return false;
189
e0ee46f2 190 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 191}
192
439689c6
SS		 193static bool link_ipv6_enabled(Link *link) {
194 assert(link);
195
196 if (!socket_ipv6_is_supported())
197 return false;
198
b102cdca 199 if (link->network->bond)
2b00a4e0
TY		 200 return false;
201
4b600505
YW		 202 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
203 return false;
204
af9ba57a
YW		 205 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
206 return false;
207
4cef7fe3
TY		 208 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
209 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
439689c6
SS		 210}
211
7465dd22
PF		 212static bool link_radv_enabled(Link *link) {
213 assert(link);
214
215 if (!link_ipv6ll_enabled(link))
216 return false;
217
55a7c78b 218 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 219}
220
769d324c 221static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 222 assert(link);
223
5a8bcb67
LP		 224 if (link->flags & IFF_LOOPBACK)
225 return false;
226
227 if (!link->network)
228 return false;
229
765afd5c
LP		 230 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
231 return false;
232
e0ee46f2 233 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 234}
235
236static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 237 assert(link);
765afd5c
LP		 238
239 if (!socket_ipv6_is_supported())
240 return false;
241
769d324c
LP		 242 if (link->flags & IFF_LOOPBACK)
243 return false;
244
245 if (!link->network)
246 return false;
247
765afd5c
LP		 248 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
249 return false;
250
4b600505
YW		 251 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
252 return false;
253
e0ee46f2 254 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 255}
256
23d8b221
SS		 257static bool link_proxy_arp_enabled(Link *link) {
258 assert(link);
259
260 if (link->flags & IFF_LOOPBACK)
261 return false;
262
263 if (!link->network)
264 return false;
265
266 if (link->network->proxy_arp < 0)
267 return false;
268
269 return true;
270}
271
b9d74c40
LP		 272static bool link_ipv6_accept_ra_enabled(Link *link) {
273 assert(link);
274
fa709992
LP		 275 if (!socket_ipv6_is_supported())
276 return false;
277
f5a8c43f
TG		 278 if (link->flags & IFF_LOOPBACK)
279 return false;
280
281 if (!link->network)
282 return false;
283
702c979f
SS		 284 if (!link_ipv6ll_enabled(link))
285 return false;
286
f5a8c43f
TG		 287 /* If unset use system default (enabled if local forwarding is disabled.
288 * disabled if local forwarding is enabled).
289 * If set, ignore or enforce RA independent of local forwarding state.
290 */
291 if (link->network->ipv6_accept_ra < 0)
292 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
293 return !link_ipv6_forward_enabled(link);
294 else if (link->network->ipv6_accept_ra > 0)
295 /* accept RA even if ip_forward is enabled */
296 return true;
297 else
298 /* ignore RA */
299 return false;
300}
301
1f0d9695 302static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 303 assert(link);
d68e2e59
LP		 304
305 if (!socket_ipv6_is_supported())
306 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
307
49092e22 308 if (link->flags & IFF_LOOPBACK)
1f0d9695 309 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 310
311 if (!link->network)
1f0d9695 312 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 313
314 return link->network->ipv6_privacy_extensions;
315}
316
439689c6 317static int link_enable_ipv6(Link *link) {
439689c6
SS		 318 bool disabled;
319 int r;
320
321 if (link->flags & IFF_LOOPBACK)
322 return 0;
323
324 disabled = !link_ipv6_enabled(link);
325
62e021a9 326 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", disabled);
439689c6 327 if (r < 0)
c98b3545 328 log_link_warning_errno(link, r, "Cannot %s IPv6: %m", enable_disable(!disabled));
2d37cd53 329 else
b106c586 330 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
439689c6
SS		 331
332 return 0;
333}
334
34bf3c00
YW		 335static bool link_is_enslaved(Link *link) {
336 if (link->flags & IFF_SLAVE)
337 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
338 return true;
339
34bf3c00
YW		 340 if (!link->network)
341 return false;
342
bb262ef0 343 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 344 return true;
345
bb262ef0
YW		 346 /* TODO: add conditions for other netdevs. */
347
34bf3c00
YW		 348 return false;
349}
350
45e11abf
YW		 351static void link_update_master_operstate(Link *link, NetDev *netdev) {
352 Link *master;
353
354 if (!netdev)
355 return;
356
357 if (link_get(link->manager, netdev->ifindex, &master) < 0)
358 return;
359
360 link_update_operstate(master, true);
361}
362
363void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 364 LinkOperationalState operstate;
45e11abf 365 Iterator i;
14153d1b 366
84de38c5
TG		 367 assert(link);
368
369 if (link->kernel_operstate == IF_OPER_DORMANT)
370 operstate = LINK_OPERSTATE_DORMANT;
371 else if (link_has_carrier(link)) {
372 Address *address;
373 uint8_t scope = RT_SCOPE_NOWHERE;
84de38c5
TG		 374
375 /* if we have carrier, check what addresses we have */
376 SET_FOREACH(address, link->addresses, i) {
377 if (!address_is_ready(address))
378 continue;
379
380 if (address->scope < scope)
381 scope = address->scope;
382 }
383
384 /* for operstate we also take foreign addresses into account */
385 SET_FOREACH(address, link->addresses_foreign, i) {
386 if (!address_is_ready(address))
387 continue;
388
389 if (address->scope < scope)
390 scope = address->scope;
391 }
392
393 if (scope < RT_SCOPE_SITE)
394 /* universally accessible addresses found */
395 operstate = LINK_OPERSTATE_ROUTABLE;
396 else if (scope < RT_SCOPE_HOST)
397 /* only link or site local addresses found */
398 operstate = LINK_OPERSTATE_DEGRADED;
399 else
400 /* no useful addresses found */
401 operstate = LINK_OPERSTATE_CARRIER;
402 } else if (link->flags & IFF_UP)
403 operstate = LINK_OPERSTATE_NO_CARRIER;
404 else
405 operstate = LINK_OPERSTATE_OFF;
406
14153d1b 407 if (IN_SET(operstate, LINK_OPERSTATE_DEGRADED, LINK_OPERSTATE_CARRIER) &&
34bf3c00 408 link_is_enslaved(link))
14153d1b
YW		 409 operstate = LINK_OPERSTATE_ENSLAVED;
410
c9cc0383 411 if (operstate >= LINK_OPERSTATE_CARRIER) {
959f65d3
YW		 412 Link *slave;
413
5f707e12 414 SET_FOREACH(slave, link->slaves, i) {
959f65d3
YW		 415 link_update_operstate(slave, false);
416
c9cc0383
YW		 417 if (slave->operstate < LINK_OPERSTATE_CARRIER)
418 operstate = LINK_OPERSTATE_DEGRADED_CARRIER;
959f65d3
YW		 419 }
420 }
421
84de38c5
TG		 422 if (link->operstate != operstate) {
423 link->operstate = operstate;
424 link_send_changed(link, "OperationalState", NULL);
425 link_dirty(link);
84de38c5 426 }
959f65d3 427
45e11abf
YW		 428 if (also_update_master && link->network) {
429 link_update_master_operstate(link, link->network->bond);
430 link_update_master_operstate(link, link->network->bridge);
959f65d3 431 }
84de38c5
TG		 432}
433
51d18171
TG		 434#define FLAG_STRING(string, flag, old, new) \
435 (((old ^ new) & flag) \
436 ? ((old & flag) ? (" -" string) : (" +" string)) \
437 : "")
438
bb262ef0 439static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 440 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
441 uint8_t operstate;
442 int r;
443
444 assert(link);
445
446 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 447 if (r < 0)
448 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 449
1c4baffc 450 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 451 if (r < 0)
452 /* if we got a message without operstate, take it to mean
453 the state was unchanged */
454 operstate = link->kernel_operstate;
455
bb262ef0 456 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 457 return 0;
458
459 if (link->flags != flags) {
6a7a4e4d 460 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		 461 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
462 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
463 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
464 FLAG_STRING("UP", IFF_UP, link->flags, flags),
465 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
466 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
467 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
468 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
469 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
470 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
471 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
472 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
473 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
474 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
475 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
476 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
477 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
478 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
479 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
480
481 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
482 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
483 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
484 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
485 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
486 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
487 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
488 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
489
490 /* link flags are currently at most 18 bits, let's align to
491 * printing 20 */
492 if (unknown_flags_added)
79008bdd 493 log_link_debug(link,
6a7a4e4d 494 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 495 unknown_flags_added);
496
497 if (unknown_flags_removed)
79008bdd 498 log_link_debug(link,
6a7a4e4d 499 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 500 unknown_flags_removed);
501 }
502
503 link->flags = flags;
504 link->kernel_operstate = operstate;
505
959f65d3 506 link_update_operstate(link, true);
51d18171
TG		 507
508 return 0;
509}
510
1c4baffc 511static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 512 _cleanup_(link_unrefp) Link *link = NULL;
505f8da7 513 uint16_t type;
6cad256d 514 const char *ifname, *kind = NULL;
505f8da7 515 int r, ifindex;
b710e6b6 516 unsigned short iftype;
f579559b 517
0c2f9b84 518 assert(manager);
505f8da7 519 assert(message);
f579559b
TG		 520 assert(ret);
521
6cad256d
TJ		 522 /* check for link kind */
523 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
524 if (r == 0) {
db2f8a2e 525 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 526 r = sd_netlink_message_exit_container(message);
527 if (r < 0)
528 return r;
529 }
530
1c4baffc 531 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 532 if (r < 0)
533 return r;
534 else if (type != RTM_NEWLINK)
535 return -EINVAL;
536
537 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
538 if (r < 0)
539 return r;
540 else if (ifindex <= 0)
541 return -EINVAL;
542
b710e6b6
LP		 543 r = sd_rtnl_message_link_get_type(message, &iftype);
544 if (r < 0)
545 return r;
546
1c4baffc 547 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 548 if (r < 0)
549 return r;
550
17f9c355 551 link = new(Link, 1);
f579559b
TG		 552 if (!link)
553 return -ENOMEM;
554
17f9c355
YW		 555 *link = (Link) {
556 .n_ref = 1,
557 .manager = manager,
558 .state = LINK_STATE_PENDING,
559 .rtnl_extended_attrs = true,
560 .ifindex = ifindex,
561 .iftype = iftype,
562 };
563
505f8da7
TG		 564 link->ifname = strdup(ifname);
565 if (!link->ifname)
566 return -ENOMEM;
f579559b 567
6cad256d
TJ		 568 if (kind) {
569 link->kind = strdup(kind);
570 if (!link->kind)
571 return -ENOMEM;
572 }
573
cbff7170
TJ		 574 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
575 if (r < 0)
576 log_link_debug_errno(link, r, "New device has no master, continuing without");
577
1c4baffc 578 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 579 if (r < 0)
34437b4f 580 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 581
34437b4f 582 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 583 return -ENOMEM;
fe8db0c5 584
34437b4f 585 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 586 return -ENOMEM;
587
34437b4f 588 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 589 return -ENOMEM;
590
d5099efc 591 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 592 if (r < 0)
593 return r;
594
595 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 596 if (r < 0)
597 return r;
598
bb262ef0 599 r = link_update_flags(link, message, false);
51d18171
TG		 600 if (r < 0)
601 return r;
602
1cc6c93a 603 *ret = TAKE_PTR(link);
f579559b
TG		 604
605 return 0;
606}
607
8301aa0b 608static Link *link_free(Link *link) {
428fd0a7
TG		 609 Address *address;
610
8301aa0b 611 assert(link);
f579559b 612
f535e354
YW		 613 link->routes = set_free_with_destructor(link->routes, route_free);
614 link->routes_foreign = set_free_with_destructor(link->routes_foreign, route_free);
adda1ed9 615
f535e354
YW		 616 link->addresses = set_free_with_destructor(link->addresses, address_free);
617 link->addresses_foreign = set_free_with_destructor(link->addresses_foreign, address_free);
adda1ed9 618
11bf3cce
LP		 619 while ((address = link->pool_addresses)) {
620 LIST_REMOVE(addresses, link->pool_addresses, address);
621 address_free(address);
622 }
623
bfcdba8d 624 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 625 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 626 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 627
7272b25e 628 link_lldp_emit_stop(link);
8e1ad1ea 629
68a8723c
TG		 630 free(link->lease_file);
631
4afd3348 632 sd_lldp_unref(link->lldp);
49699bac
SS		 633 free(link->lldp_file);
634
c69305ff
LP		 635 ndisc_flush(link);
636
56cd007a 637 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 638 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 639 sd_ndisc_unref(link->ndisc);
7465dd22 640 sd_radv_unref(link->radv);
1e7a0e21 641
c166a070 642 free(link->ifname);
ceac4078 643 free(link->kind);
6cad256d 644
db2f8a2e 645 (void) unlink(link->state_file);
fe8db0c5 646 free(link->state_file);
c166a070 647
51517f9e 648 sd_device_unref(link->sd_device);
b5db00e5 649
0d4ad91d 650 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 651 hashmap_free(link->bound_by_links);
652
5f707e12 653 set_free_with_destructor(link->slaves, link_unref);
033295c1 654
c9c908a6
YW		 655 network_unref(link->network);
656
8301aa0b 657 return mfree(link);
14b746f7
TG		 658}
659
8301aa0b 660DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 661
11a7f229
TG		 662int link_get(Manager *m, int ifindex, Link **ret) {
663 Link *link;
11a7f229
TG		 664
665 assert(m);
11a7f229
TG		 666 assert(ifindex);
667 assert(ret);
668
ae06ab10 669 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 670 if (!link)
671 return -ENODEV;
672
673 *ret = link;
674
675 return 0;
676}
677
af9ba57a 678void link_set_state(Link *link, LinkState state) {
e331e246
TG		 679 assert(link);
680
681 if (link->state == state)
682 return;
683
0beb9542
YW		 684 log_link_debug(link, "State changed: %s -> %s",
685 link_state_to_string(link->state),
686 link_state_to_string(state));
687
e331e246
TG		 688 link->state = state;
689
690 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 691}
692
57bd6899
TG		 693static void link_enter_unmanaged(Link *link) {
694 assert(link);
695
e331e246 696 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 697
84de38c5 698 link_dirty(link);
57bd6899
TG		 699}
700
946f8e14 701int link_stop_clients(Link *link) {
111bb8f9
TG		 702 int r = 0, k;
703
704 assert(link);
705 assert(link->manager);
706 assert(link->manager->event);
707
ba179154 708 if (link->dhcp_client) {
111bb8f9 709 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 710 if (k < 0)
36c7d709 711 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 712 }
713
ba179154 714 if (link->ipv4ll) {
111bb8f9 715 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 716 if (k < 0)
36c7d709 717 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 718 }
719
f5a8c43f
TG		 720 if (link->dhcp6_client) {
721 k = sd_dhcp6_client_stop(link->dhcp6_client);
722 if (k < 0)
36c7d709 723 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 724 }
4138fb2c 725
1e7a0e21
LP		 726 if (link->ndisc) {
727 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 728 if (k < 0)
36c7d709 729 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 730 }
731
7465dd22
PF		 732 if (link->radv) {
733 k = sd_radv_stop(link->radv);
734 if (k < 0)
735 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
736 }
737
7272b25e 738 link_lldp_emit_stop(link);
111bb8f9
TG		 739 return r;
740}
741
b22d8a00 742void link_enter_failed(Link *link) {
ef1ba606 743 assert(link);
f882c247 744
370e9930 745 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 746 return;
747
6a7a4e4d 748 log_link_warning(link, "Failed");
449f7554 749
e331e246 750 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 751
111bb8f9
TG		 752 link_stop_clients(link);
753
84de38c5 754 link_dirty(link);
f882c247
TG		 755}
756
4f434938
LP		 757static Address* link_find_dhcp_server_address(Link *link) {
758 Address *address;
759
760 assert(link);
761 assert(link->network);
762
d4cdbea5 763 /* The first statically configured address if there is any */
4f434938
LP		 764 LIST_FOREACH(addresses, address, link->network->static_addresses) {
765
766 if (address->family != AF_INET)
767 continue;
768
af93291c 769 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 770 continue;
771
772 return address;
773 }
774
775 /* If that didn't work, find a suitable address we got from the pool */
776 LIST_FOREACH(addresses, address, link->pool_addresses) {
777 if (address->family != AF_INET)
778 continue;
779
780 return address;
781 }
782
783 return NULL;
784}
785
7033af49
YW		 786static int link_join_netdevs_after_configured(Link *link) {
787 NetDev *netdev;
788 Iterator i;
789 int r;
790
791 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
792 if (netdev->ifindex > 0)
793 /* Assume already enslaved. */
794 continue;
795
796 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
797 continue;
798
799 log_struct(LOG_DEBUG,
800 LOG_LINK_INTERFACE(link),
801 LOG_NETDEV_INTERFACE(netdev),
802 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
803
804 r = netdev_join(netdev, link, NULL);
805 if (r < 0)
806 return log_struct_errno(LOG_WARNING, r,
807 LOG_LINK_INTERFACE(link),
808 LOG_NETDEV_INTERFACE(netdev),
809 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
810 }
811
812 return 0;
813}
814
e3a7b048 815static void link_enter_configured(Link *link) {
dd43110f
TG		 816 assert(link);
817 assert(link->network);
e3a7b048 818
289e6774 819 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 820 return;
dd43110f 821
6a7a4e4d 822 log_link_info(link, "Configured");
dd43110f 823
e331e246 824 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 825
7033af49
YW		 826 (void) link_join_netdevs_after_configured(link);
827
84de38c5 828 link_dirty(link);
dd43110f
TG		 829}
830
47079967 831static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 832 RoutingPolicyRule *rule, *rrule = NULL;
833 int r;
834
835 assert(link);
836 assert(link->network);
837
2428613f
YW		 838 link_set_state(link, LINK_STATE_CONFIGURING);
839 link->routing_policy_rules_configured = false;
840
8a9b3a23
SS		 841 LIST_FOREACH(rules, rule, link->network->rules) {
842 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
926062f0
SS		 843 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif,
844 rule->protocol, &rule->sport, &rule->dport, &rrule);
e6b65ab7 845 if (r == 0) {
8a9b3a23
SS		 846 (void) routing_policy_rule_make_local(link->manager, rrule);
847 continue;
848 }
849
29889b4d 850 r = routing_policy_rule_configure(rule, link, NULL, false);
8a9b3a23
SS		 851 if (r < 0) {
852 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
853 link_enter_failed(link);
854 return r;
855 }
856
7715629e 857 link->routing_policy_rule_messages++;
8a9b3a23
SS		 858 }
859
860 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 861 if (link->routing_policy_rule_messages == 0) {
862 link->routing_policy_rules_configured = true;
863 link_check_ready(link);
864 } else
865 log_link_debug(link, "Setting routing policy rules");
8a9b3a23
SS		 866
867 return 0;
868}
869
302a796f 870static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 871 int r;
872
1046bf9b 873 assert(link);
7715629e 874 assert(link->route_messages > 0);
289e6774
WKI		 875 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
876 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 877
7715629e 878 link->route_messages--;
f882c247 879
77a008c0 880 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 881 return 1;
882
1c4baffc 883 r = sd_netlink_message_get_errno(m);
c166a070 884 if (r < 0 && r != -EEXIST)
a2fae7bb 885 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 886
7715629e 887 if (link->route_messages == 0) {
6a7a4e4d 888 log_link_debug(link, "Routes set");
7715629e 889 link->static_routes_configured = true;
8012cd39 890 link_check_ready(link);
dd3efc09 891 }
f882c247
TG		 892
893 return 1;
894}
895
b5799eeb 896int link_request_set_routes(Link *link) {
bf61b05a
LP		 897 enum {
898 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
899 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
900 _PHASE_MAX
901 } phase;
a6cc569e 902 Route *rt;
f882c247
TG		 903 int r;
904
905 assert(link);
906 assert(link->network);
c42ff3a1
WKI		 907 assert(link->addresses_configured);
908 assert(link->address_messages == 0);
289e6774 909 assert(link->state != _LINK_STATE_INVALID);
f882c247 910
289e6774 911 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 912 link->static_routes_configured = false;
27c34f73 913
47079967 914 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 915 if (r < 0)
916 return r;
f882c247 917
bf61b05a
LP		 918 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
919 for (phase = 0; phase < _PHASE_MAX; phase++)
920 LIST_FOREACH(routes, rt, link->network->static_routes) {
0d34228f 921
bf61b05a
LP		 922 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
923 continue;
a6cc569e 924
0d34228f
SS		 925 r = route_configure(rt, link, route_handler);
926 if (r < 0) {
927 log_link_warning_errno(link, r, "Could not set routes: %m");
928 link_enter_failed(link);
929 return r;
930 }
931
932 link->route_messages++;
933 }
f5be5601 934
7715629e
ST		 935 if (link->route_messages == 0) {
936 link->static_routes_configured = true;
8012cd39 937 link_check_ready(link);
431ca2ce 938 } else
6a7a4e4d 939 log_link_debug(link, "Setting routes");
f882c247
TG		 940
941 return 0;
942}
943
6accfd31
DA		 944void link_check_ready(Link *link) {
945 Address *a;
946 Iterator i;
947
948 assert(link);
949
950 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
951 return;
952
953 if (!link->network)
954 return;
955
956 if (!link->addresses_configured)
957 return;
958
959 if (!link->neighbors_configured)
960 return;
961
6aa5773b
DA		 962 SET_FOREACH(a, link->addresses, i)
963 if (!address_is_ready(a))
964 return;
965
966 if (!link->addresses_ready) {
967 link->addresses_ready = true;
968 link_request_set_routes(link);
710ce9e5 969 return;
6aa5773b
DA		 970 }
971
6accfd31
DA		 972 if (!link->static_routes_configured)
973 return;
974
975 if (!link->routing_policy_rules_configured)
976 return;
977
6c0c041a
YW		 978 if (link_ipv4ll_enabled(link) && !(link->ipv4ll_address && link->ipv4ll_route))
979 return;
6accfd31 980
b102cdca
YW		 981 if (link_ipv6ll_enabled(link) &&
982 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
983 return;
6accfd31 984
552081a4 985 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
6c0c041a
YW		 986 !(link->dhcp4_configured || link->dhcp6_configured) &&
987 !(link_ipv4ll_fallback_enabled(link) && link->ipv4ll_address && link->ipv4ll_route))
988 /* When DHCP is enabled, at least one protocol must provide an address, or
989 * an IPv4ll fallback address must be configured. */
b102cdca 990 return;
6accfd31 991
b102cdca
YW		 992 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
993 return;
6accfd31 994
6accfd31
DA		 995 if (link->state != LINK_STATE_CONFIGURED)
996 link_enter_configured(link);
997
998 return;
999}
1000
e4a71bf3
WKI		 1001static int link_request_set_neighbors(Link *link) {
1002 Neighbor *neighbor;
1003 int r;
1004
1005 assert(link);
1006 assert(link->network);
1007 assert(link->state != _LINK_STATE_INVALID);
1008
1009 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 1010 link->neighbors_configured = false;
e4a71bf3
WKI		 1011
1012 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
1013 r = neighbor_configure(neighbor, link, NULL);
1014 if (r < 0) {
1015 log_link_warning_errno(link, r, "Could not set neighbor: %m");
1016 link_enter_failed(link);
1017 return r;
1018 }
1019 }
1020
1021 if (link->neighbor_messages == 0) {
1022 link->neighbors_configured = true;
1023 link_check_ready(link);
1024 } else
1025 log_link_debug(link, "Setting neighbors");
1026
1027 return 0;
1028}
1029
302a796f 1030static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1031 int r;
1032
4958aee4 1033 assert(rtnl);
f5be5601
TG		 1034 assert(m);
1035 assert(link);
1036 assert(link->ifname);
7715629e 1037 assert(link->address_messages > 0);
289e6774 1038 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1039 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1040
7715629e 1041 link->address_messages--;
f882c247 1042
5da8149f 1043 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1044 return 1;
1045
1c4baffc 1046 r = sd_netlink_message_get_errno(m);
c166a070 1047 if (r < 0 && r != -EEXIST)
a2fae7bb 1048 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 1049 else if (r >= 0)
200a0868 1050 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1051
7715629e 1052 if (link->address_messages == 0) {
6a7a4e4d 1053 log_link_debug(link, "Addresses set");
c42ff3a1 1054 link->addresses_configured = true;
6aa5773b 1055 link_check_ready(link);
dd3efc09 1056 }
f882c247
TG		 1057
1058 return 1;
1059}
1060
a380b2d4 1061static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1062 _cleanup_free_ struct in_addr *addresses = NULL;
1063 size_t n_addresses = 0, n_allocated = 0;
5512a963 1064 unsigned i;
4f5f911e
LP		 1065
1066 log_debug("Copying DNS server information from %s", link->ifname);
1067
1068 if (!link->network)
1069 return 0;
1070
5512a963 1071 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 1072 struct in_addr ia;
4f5f911e
LP		 1073
1074 /* Only look for IPv4 addresses */
5512a963 1075 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 1076 continue;
1077
49ad6829
LP		 1078 ia = link->network->dns[i].address.in;
1079
1080 /* Never propagate obviously borked data */
1081 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1082 continue;
1083
4f5f911e
LP		 1084 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1085 return log_oom();
1086
49ad6829 1087 addresses[n_addresses++] = ia;
4f5f911e
LP		 1088 }
1089
5512a963 1090 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e 1091 const struct in_addr *da = NULL;
072320ea 1092 int j, n;
4f5f911e
LP		 1093
1094 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
1095 if (n > 0) {
1096
1097 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1098 return log_oom();
1099
072320ea
TH		 1100 for (j = 0; j < n; j++)
1101 if (in4_addr_is_non_local(&da[j]))
1102 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1103 }
1104 }
1105
1106 if (n_addresses <= 0)
1107 return 0;
1108
1109 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
1110}
1111
a380b2d4 1112static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1113 _cleanup_free_ struct in_addr *addresses = NULL;
1114 size_t n_addresses = 0, n_allocated = 0;
1115 char **a;
1116
1117 if (!link->network)
1118 return 0;
1119
1120 log_debug("Copying NTP server information from %s", link->ifname);
1121
1122 STRV_FOREACH(a, link->network->ntp) {
004aadca 1123 union in_addr_union ia;
4f5f911e
LP		 1124
1125 /* Only look for IPv4 addresses */
004aadca 1126 if (in_addr_from_string(AF_INET, *a, &ia) <= 0)
4f5f911e 1127 continue;
49ad6829
LP		 1128
1129 /* Never propagate obviously borked data */
004aadca 1130 if (in4_addr_is_null(&ia.in) || in4_addr_is_localhost(&ia.in))
49ad6829 1131 continue;
4f5f911e
LP		 1132
1133 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1134 return log_oom();
1135
004aadca 1136 addresses[n_addresses++] = ia.in;
4f5f911e
LP		 1137 }
1138
5512a963 1139 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e 1140 const struct in_addr *da = NULL;
072320ea 1141 int j, n;
4f5f911e
LP		 1142
1143 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1144 if (n > 0) {
1145
1146 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1147 return log_oom();
1148
072320ea
TH		 1149 for (j = 0; j < n; j++)
1150 if (in4_addr_is_non_local(&da[j]))
1151 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1152 }
1153 }
1154
1155 if (n_addresses <= 0)
1156 return 0;
1157
1158 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1159}
1160
f6bb7ac5
TJ		 1161static int link_set_bridge_fdb(Link *link) {
1162 FdbEntry *fdb_entry;
197e2809 1163 int r;
f6bb7ac5
TJ		 1164
1165 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1166 r = fdb_entry_configure(link, fdb_entry);
197e2809 1167 if (r < 0)
f6bb7ac5 1168 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1169 }
1170
197e2809 1171 return 0;
f6bb7ac5
TJ		 1172}
1173
289e6774 1174static int link_request_set_addresses(Link *link) {
95b74ef6 1175 AddressLabel *label;
a6cc569e 1176 Address *ad;
f882c247
TG		 1177 int r;
1178
1179 assert(link);
1180 assert(link->network);
f5be5601 1181 assert(link->state != _LINK_STATE_INVALID);
f882c247 1182
2428613f
YW		 1183 link_set_state(link, LINK_STATE_CONFIGURING);
1184
1185 /* Reset all *_configured flags we are configuring. */
1186 link->addresses_configured = false;
6aa5773b 1187 link->addresses_ready = false;
2428613f
YW		 1188 link->neighbors_configured = false;
1189 link->static_routes_configured = false;
1190 link->routing_policy_rules_configured = false;
1191
f6bb7ac5
TJ		 1192 r = link_set_bridge_fdb(link);
1193 if (r < 0)
1194 return r;
1195
f3ef324d
YW		 1196 r = link_request_set_neighbors(link);
1197 if (r < 0)
1198 return r;
e4a71bf3 1199
3d3d4255 1200 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1201 bool update;
1202
1203 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1204
1205 r = address_configure(ad, link, address_handler, update);
dd3efc09 1206 if (r < 0) {
5a8bcb67 1207 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1208 link_enter_failed(link);
95b74ef6
SS		 1209 return r;
1210 }
1211
7715629e 1212 link->address_messages++;
95b74ef6
SS		 1213 }
1214
1215 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1216 r = address_label_configure(label, link, NULL, false);
95b74ef6
SS		 1217 if (r < 0) {
1218 log_link_warning_errno(link, r, "Could not set address label: %m");
1219 link_enter_failed(link);
f5be5601
TG		 1220 return r;
1221 }
1222
7715629e 1223 link->address_label_messages++;
f882c247
TG		 1224 }
1225
d4cdbea5
TG		 1226 /* now that we can figure out a default address for the dhcp server,
1227 start it */
708c425d 1228 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
d4cdbea5 1229 Address *address;
4f5f911e
LP		 1230 Link *uplink = NULL;
1231 bool acquired_uplink = false;
d4cdbea5
TG		 1232
1233 address = link_find_dhcp_server_address(link);
1234 if (!address) {
6a7a4e4d 1235 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1236 link_enter_failed(link);
1237 return 0;
1238 }
1239
61986155 1240 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1241 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1242 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1243 if (r < 0)
1244 return r;
1245
1246 /* TODO:
1247 r = sd_dhcp_server_set_router(link->dhcp_server,
1248 &main_address->in_addr.in);
1249 if (r < 0)
1250 return r;
d4cdbea5
TG		 1251 */
1252
586ac6f7
LP		 1253 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1254 r = sd_dhcp_server_set_max_lease_time(
1255 link->dhcp_server,
1256 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1257 if (r < 0)
1258 return r;
1259 }
1260
1261 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1262 r = sd_dhcp_server_set_default_lease_time(
1263 link->dhcp_server,
1264 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1265 if (r < 0)
1266 return r;
1267 }
1268
1a04db0f
LP		 1269 if (link->network->dhcp_server_emit_dns) {
1270
4f5f911e 1271 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1272 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1273 else {
1274 uplink = manager_find_uplink(link->manager, link);
1275 acquired_uplink = true;
1276
1277 if (!uplink) {
1278 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1279 r = 0;
1280 } else
a380b2d4 1281 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1282 }
1283 if (r < 0)
1284 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1285 }
1286
1a04db0f
LP		 1287 if (link->network->dhcp_server_emit_ntp) {
1288
4f5f911e 1289 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1290 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1291 else {
1292 if (!acquired_uplink)
1293 uplink = manager_find_uplink(link->manager, link);
1294
1295 if (!uplink) {
1296 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1297 r = 0;
1298 } else
a380b2d4 1299 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1300
1301 }
1302 if (r < 0)
1303 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1304 }
1305
77ff6022 1306 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
fc95c359
YW		 1307 if (r < 0)
1308 return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
77ff6022 1309
8eb9058d
LP		 1310 if (link->network->dhcp_server_emit_timezone) {
1311 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1312 const char *tz = NULL;
8eb9058d
LP		 1313
1314 if (link->network->dhcp_server_timezone)
1315 tz = link->network->dhcp_server_timezone;
1316 else {
1317 r = get_timezone(&buffer);
1318 if (r < 0)
1319 log_warning_errno(r, "Failed to determine timezone: %m");
1320 else
1321 tz = buffer;
1322 }
1323
1324 if (tz) {
1325 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1326 if (r < 0)
1327 return r;
1328 }
1329 }
7da7340a
RJ		 1330 if (!sd_dhcp_server_is_running(link->dhcp_server)) {
1331 r = sd_dhcp_server_start(link->dhcp_server);
1332 if (r < 0) {
1333 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
8eb9058d 1334
7da7340a 1335 link_enter_failed(link);
d4cdbea5 1336
7da7340a
RJ		 1337 return 0;
1338 }
f3ef324d 1339 }
d4cdbea5 1340
6a7a4e4d 1341 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1342 }
1343
c42ff3a1
WKI		 1344 if (link->address_messages == 0) {
1345 link->addresses_configured = true;
6aa5773b 1346 link_check_ready(link);
c42ff3a1 1347 } else
6a7a4e4d 1348 log_link_debug(link, "Setting addresses");
431ca2ce 1349
f882c247
TG		 1350 return 0;
1351}
1352
13b498f9 1353static int link_set_bridge_vlan(Link *link) {
86e2be7b 1354 int r;
13b498f9
TJ		 1355
1356 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1357 if (r < 0)
1358 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1359
1360 return r;
1361}
1362
a60a720c 1363static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1364 int r;
1365
1366 if (!link_proxy_arp_enabled(link))
1367 return 0;
1368
62e021a9 1369 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1370 if (r < 0)
1371 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1372
1373 return 0;
1374}
1375
55dc8c4a
YW		 1376static int link_configure_after_setting_mtu(Link *link);
1377
302a796f 1378static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1379 int r;
1380
1381 assert(m);
1382 assert(link);
1383 assert(link->ifname);
1384
55dc8c4a
YW		 1385 link->setting_mtu = false;
1386
5da8149f 1387 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1388 return 1;
1389
1c4baffc 1390 r = sd_netlink_message_get_errno(m);
55dc8c4a 1391 if (r < 0) {
a2fae7bb 1392 log_link_warning_errno(link, r, "Could not set MTU: %m");
55dc8c4a
YW		 1393 return 1;
1394 }
1395
1396 log_link_debug(link, "Setting MTU done.");
1397
bd08ce56 1398 if (link->state == LINK_STATE_INITIALIZED)
55dc8c4a 1399 (void) link_configure_after_setting_mtu(link);
4f882b2a
TG		 1400
1401 return 1;
1402}
1403
933c70a0 1404int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1405 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1406 int r;
1407
1408 assert(link);
1409 assert(link->manager);
1410 assert(link->manager->rtnl);
1411
40288ece
YW		 1412 if (mtu == 0 || link->setting_mtu)
1413 return 0;
1414
933c70a0 1415 if (link->mtu == mtu)
ee493106
YW		 1416 return 0;
1417
6a7a4e4d 1418 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1419
6a7a4e4d
LP		 1420 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1421 if (r < 0)
1422 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1423
44b598a1 1424 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
b102cdca 1425 * for this interface, then disable IPv6 else enable it. */
44b598a1
SS		 1426 (void) link_enable_ipv6(link);
1427
1428 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1429 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1430 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1431
1432 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1433 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1434
72c2500b 1435 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1436 }
1437
1c4baffc 1438 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1439 if (r < 0)
1440 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1441
302a796f
YW		 1442 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1443 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1444 if (r < 0)
1445 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1446
ae941762 1447 link_ref(link);
1046bf9b 1448 link->setting_mtu = true;
b226d99b 1449
4f882b2a
TG		 1450 return 0;
1451}
1452
f6fcc1c2
YW		 1453static bool link_reduces_vlan_mtu(Link *link) {
1454 /* See netif_reduces_vlan_mtu() in kernel. */
1455 return streq_ptr(link->kind, "macsec");
1456}
1457
1458static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1459 uint32_t mtu = 0;
1460 NetDev *dev;
1461 Iterator i;
1462
1463 HASHMAP_FOREACH(dev, link->network->stacked_netdevs, i)
1464 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1465 /* See vlan_dev_change_mtu() in kernel. */
1466 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1467
1468 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1469 /* See macvlan_change_mtu() in kernel. */
1470 mtu = dev->mtu;
1471
1472 return mtu;
1473}
1474
1475static int link_configure_mtu(Link *link) {
1476 uint32_t mtu;
1477
1478 assert(link);
1479 assert(link->network);
1480
1481 if (link->network->mtu > 0)
1482 return link_set_mtu(link, link->network->mtu);
1483
1484 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1485 if (link->mtu >= mtu)
1486 return 0;
1487
1488 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1489 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1490 link->mtu, mtu);
1491
1492 return link_set_mtu(link, mtu);
1493}
1494
302a796f 1495static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1496 int r;
1497
1498 assert(m);
1499 assert(link);
1500 assert(link->ifname);
1501
1502 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1503 return 1;
1504
1505 r = sd_netlink_message_get_errno(m);
1506 if (r < 0)
1507 log_link_warning_errno(link, r, "Could not set link flags: %m");
1508
1509 return 1;
1510}
1511
1512static int link_set_flags(Link *link) {
1513 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1514 unsigned ifi_change = 0;
1515 unsigned ifi_flags = 0;
1516 int r;
1517
1518 assert(link);
1519 assert(link->manager);
1520 assert(link->manager->rtnl);
1521
1522 if (link->flags & IFF_LOOPBACK)
1523 return 0;
1524
1525 if (!link->network)
1526 return 0;
1527
866e6b7a 1528 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1529 return 0;
1530
1531 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1532 if (r < 0)
1533 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1534
1535 if (link->network->arp >= 0) {
1536 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1537 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1538 }
1539
1540 if (link->network->multicast >= 0) {
1541 ifi_change |= IFF_MULTICAST;
1542 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1543 }
1544
866e6b7a
SS		 1545 if (link->network->allmulticast >= 0) {
1546 ifi_change |= IFF_ALLMULTI;
1547 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1548 }
1549
99d2baa2
SS		 1550 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1551 if (r < 0)
1552 return log_link_error_errno(link, r, "Could not set link flags: %m");
1553
302a796f
YW		 1554 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1555 link_netlink_destroy_callback, link);
99d2baa2
SS		 1556 if (r < 0)
1557 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1558
1559 link_ref(link);
1560
1561 return 0;
1562}
1563
e7ab854c
TG		 1564static int link_acquire_ipv6_conf(Link *link) {
1565 int r;
1566
1567 assert(link);
1568
e7ab854c 1569 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1570 assert(link->ndisc);
e7ab854c
TG		 1571
1572 log_link_debug(link, "Discovering IPv6 routers");
1573
1e7a0e21 1574 r = sd_ndisc_start(link->ndisc);
63348d13 1575 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1576 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1577 }
1578
7465dd22
PF		 1579 if (link_radv_enabled(link)) {
1580 assert(link->radv);
1581 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1582
1583 log_link_debug(link, "Starting IPv6 Router Advertisements");
1584
1585 r = sd_radv_start(link->radv);
1586 if (r < 0 && r != -EBUSY)
1587 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1588 }
1589
10752343
PF		 1590 (void) dhcp6_request_prefix_delegation(link);
1591
e7ab854c
TG		 1592 return 0;
1593}
1594
6fc25497 1595static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1596 int r;
1597
1598 assert(link);
ff254138
TG		 1599 assert(link->manager);
1600 assert(link->manager->event);
1601
78c958f8 1602 if (link_ipv4ll_enabled(link)) {
eb34d4af 1603 assert(link->ipv4ll);
ff254138 1604
6a7a4e4d 1605 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1606
1607 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1608 if (r < 0)
1609 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1610 }
1611
78c958f8 1612 if (link_dhcp4_enabled(link)) {
eb34d4af 1613 assert(link->dhcp_client);
ff254138 1614
6a7a4e4d 1615 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1616
5c1d3fc9 1617 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1618 if (r < 0)
1619 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1620 }
ff254138 1621
6fc25497
SS		 1622 return 0;
1623}
1624
1625static int link_acquire_conf(Link *link) {
1626 int r;
1627
1628 assert(link);
1629
1630 r = link_acquire_ipv4_conf(link);
1631 if (r < 0)
1632 return r;
1633
3f7cc080 1634 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1635 r = link_acquire_ipv6_conf(link);
1636 if (r < 0)
1637 return r;
1638 }
1639
7272b25e
LP		 1640 if (link_lldp_emit_enabled(link)) {
1641 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1642 if (r < 0)
1643 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1644 }
1645
ff254138
TG		 1646 return 0;
1647}
1648
a61bb41c 1649bool link_has_carrier(Link *link) {
deb2e523
TG		 1650 /* see Documentation/networking/operstates.txt in the kernel sources */
1651
a61bb41c 1652 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1653 return true;
1654
a61bb41c 1655 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1656 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1657 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1658 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1659 return true;
1660
1661 return false;
1662}
1663
0e2fdb83
SS		 1664static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1665 int r;
1666
1667 assert(link);
1668
1669 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1670 return 1;
1671
1672 r = sd_netlink_message_get_errno(m);
1673 if (r < 0)
1674 log_link_warning_errno(link, r, "Could not set address genmode for interface: %m");
1675
1676 return 1;
1677}
1678
1679static int link_configure_addrgen_mode(Link *link) {
1680 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1681 uint8_t ipv6ll_mode;
1682 int r;
1683
1684 assert(link);
1685 assert(link->network);
1686 assert(link->manager);
1687 assert(link->manager->rtnl);
1688
9f6e82e6
YW		 1689 if (!socket_ipv6_is_supported())
1690 return 0;
1691
0e2fdb83
SS		 1692 log_link_debug(link, "Setting address genmode for link");
1693
1694 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1695 if (r < 0)
1696 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1697
1698 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1699 if (r < 0)
1700 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1701
1702 r = sd_netlink_message_open_container(req, AF_INET6);
1703 if (r < 0)
1704 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1705
1706 if (!link_ipv6ll_enabled(link))
1707 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
826a3602 1708 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
0e2fdb83 1709 /* The file may not exist. And event if it exists, when stable_secret is unset,
826a3602
YW		 1710 * reading the file fails with EIO. */
1711 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1712 else
1713 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
0e2fdb83
SS		 1714
1715 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1716 if (r < 0)
1717 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1718
1719 r = sd_netlink_message_close_container(req);
1720 if (r < 0)
1721 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1722
1723 r = sd_netlink_message_close_container(req);
1724 if (r < 0)
1725 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1726
1727 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1728 link_netlink_destroy_callback, link);
1729 if (r < 0)
1730 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1731
1732 link_ref(link);
1733
1734 return 0;
1735}
1736
302a796f 1737static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1738 int r;
1739
1746cf2a
TG		 1740 assert(link);
1741
5da8149f 1742 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1743 return 1;
1744
1c4baffc 1745 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1746 if (r < 0)
26d6b214 1747 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 1748 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1749
f882c247
TG		 1750 return 1;
1751}
1752
1cc84f3b 1753static int link_up(Link *link) {
4afd3348 1754 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1755 int r;
1756
f882c247 1757 assert(link);
c106cc36 1758 assert(link->network);
f882c247
TG		 1759 assert(link->manager);
1760 assert(link->manager->rtnl);
1761
6a7a4e4d 1762 log_link_debug(link, "Bringing link up");
449f7554 1763
6a7a4e4d
LP		 1764 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1765 if (r < 0)
1766 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1767
2b2d8603 1768 /* set it free if not enslaved with networkd */
6cb955c6 1769 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1770 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1771 if (r < 0)
1772 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1773 }
1774
5d4795f3 1775 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1776 if (r < 0)
1777 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1778
c106cc36 1779 if (link->network->mac) {
1c4baffc 1780 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1781 if (r < 0)
1782 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1783 }
1784
302a796f
YW		 1785 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1786 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1787 if (r < 0)
1788 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1789
b226d99b
TG		 1790 link_ref(link);
1791
f882c247
TG		 1792 return 0;
1793}
1794
302a796f 1795static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1796 int r;
1797
1798 assert(link);
1799
1800 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1801 return 1;
1802
1c4baffc 1803 r = sd_netlink_message_get_errno(m);
0d4ad91d 1804 if (r < 0)
a2fae7bb 1805 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d
AR		 1806
1807 return 1;
1808}
1809
8e54db83 1810int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1811 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1812 int r;
1813
1814 assert(link);
1815 assert(link->manager);
1816 assert(link->manager->rtnl);
1817
6a7a4e4d 1818 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1819
1820 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1821 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1822 if (r < 0)
1823 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1824
1825 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1826 if (r < 0)
1827 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1828
8e54db83
YW		 1829 r = netlink_call_async(link->manager->rtnl, NULL, req,
1830 callback ?: link_down_handler,
302a796f 1831 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1832 if (r < 0)
1833 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1834
1835 link_ref(link);
1836
1837 return 0;
1838}
1839
1840static int link_handle_bound_to_list(Link *link) {
1841 Link *l;
1842 Iterator i;
1843 int r;
1844 bool required_up = false;
1845 bool link_is_up = false;
1846
1847 assert(link);
1848
1849 if (hashmap_isempty(link->bound_to_links))
1850 return 0;
1851
1852 if (link->flags & IFF_UP)
1853 link_is_up = true;
1854
1855 HASHMAP_FOREACH (l, link->bound_to_links, i)
1856 if (link_has_carrier(l)) {
1857 required_up = true;
1858 break;
1859 }
1860
1861 if (!required_up && link_is_up) {
8e54db83 1862 r = link_down(link, NULL);
0d4ad91d
AR		 1863 if (r < 0)
1864 return r;
1865 } else if (required_up && !link_is_up) {
1866 r = link_up(link);
1867 if (r < 0)
1868 return r;
1869 }
1870
1871 return 0;
1872}
1873
1874static int link_handle_bound_by_list(Link *link) {
1875 Iterator i;
1876 Link *l;
1877 int r;
1878
1879 assert(link);
1880
1881 if (hashmap_isempty(link->bound_by_links))
1882 return 0;
1883
1884 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1885 r = link_handle_bound_to_list(l);
1886 if (r < 0)
1887 return r;
1888 }
1889
1890 return 0;
1891}
1892
1893static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1894 int r;
1895
1896 assert(link);
1897 assert(carrier);
1898
1899 if (link == carrier)
1900 return 0;
1901
1902 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1903 return 0;
1904
1905 r = hashmap_ensure_allocated(h, NULL);
1906 if (r < 0)
1907 return r;
1908
1909 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1910 if (r < 0)
1911 return r;
1912
1913 return 0;
1914}
1915
1916static int link_new_bound_by_list(Link *link) {
1917 Manager *m;
1918 Link *carrier;
1919 Iterator i;
1920 int r;
1921 bool list_updated = false;
1922
1923 assert(link);
1924 assert(link->manager);
1925
1926 m = link->manager;
1927
b295beea 1928 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 1929 if (!carrier->network)
1930 continue;
1931
1932 if (strv_isempty(carrier->network->bind_carrier))
1933 continue;
1934
1935 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
1936 r = link_put_carrier(link, carrier, &link->bound_by_links);
1937 if (r < 0)
1938 return r;
1939
1940 list_updated = true;
1941 }
1942 }
1943
1944 if (list_updated)
84de38c5 1945 link_dirty(link);
0d4ad91d 1946
b295beea 1947 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 1948 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1949 if (r < 0)
1950 return r;
1951
84de38c5 1952 link_dirty(carrier);
0d4ad91d
AR		 1953 }
1954
1955 return 0;
1956}
1957
1958static int link_new_bound_to_list(Link *link) {
1959 Manager *m;
1960 Link *carrier;
1961 Iterator i;
1962 int r;
1963 bool list_updated = false;
1964
1965 assert(link);
1966 assert(link->manager);
1967
1968 if (!link->network)
1969 return 0;
1970
1971 if (strv_isempty(link->network->bind_carrier))
1972 return 0;
1973
1974 m = link->manager;
1975
1976 HASHMAP_FOREACH (carrier, m->links, i) {
1977 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
1978 r = link_put_carrier(link, carrier, &link->bound_to_links);
1979 if (r < 0)
1980 return r;
1981
1982 list_updated = true;
1983 }
1984 }
1985
1986 if (list_updated)
84de38c5 1987 link_dirty(link);
0d4ad91d
AR		 1988
1989 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
1990 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1991 if (r < 0)
1992 return r;
1993
84de38c5 1994 link_dirty(carrier);
0d4ad91d
AR		 1995 }
1996
1997 return 0;
1998}
1999
2000static int link_new_carrier_maps(Link *link) {
2001 int r;
2002
2003 r = link_new_bound_by_list(link);
2004 if (r < 0)
2005 return r;
2006
2007 r = link_handle_bound_by_list(link);
2008 if (r < 0)
2009 return r;
2010
2011 r = link_new_bound_to_list(link);
2012 if (r < 0)
2013 return r;
2014
2015 r = link_handle_bound_to_list(link);
2016 if (r < 0)
2017 return r;
2018
2019 return 0;
2020}
2021
2022static void link_free_bound_to_list(Link *link) {
2023 Link *bound_to;
2024 Iterator i;
2025
2026 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2027 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2028
2029 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2030 link_dirty(bound_to);
0d4ad91d
AR		 2031 }
2032
2033 return;
2034}
2035
2036static void link_free_bound_by_list(Link *link) {
2037 Link *bound_by;
2038 Iterator i;
2039
2040 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2041 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2042
2043 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2044 link_dirty(bound_by);
0d4ad91d
AR		 2045 link_handle_bound_to_list(bound_by);
2046 }
2047 }
2048
2049 return;
2050}
2051
2052static void link_free_carrier_maps(Link *link) {
2053 bool list_updated = false;
2054
2055 assert(link);
2056
2057 if (!hashmap_isempty(link->bound_to_links)) {
2058 link_free_bound_to_list(link);
2059 list_updated = true;
2060 }
2061
2062 if (!hashmap_isempty(link->bound_by_links)) {
2063 link_free_bound_by_list(link);
2064 list_updated = true;
2065 }
2066
2067 if (list_updated)
84de38c5 2068 link_dirty(link);
0d4ad91d
AR		 2069
2070 return;
2071}
2072
5f707e12
YW		 2073static int link_append_to_master(Link *link, NetDev *netdev) {
2074 Link *master;
2075 int r;
2076
2077 assert(link);
2078 assert(netdev);
2079
2080 r = link_get(link->manager, netdev->ifindex, &master);
2081 if (r < 0)
2082 return r;
2083
2084 r = set_ensure_allocated(&master->slaves, NULL);
2085 if (r < 0)
2086 return r;
2087
2088 r = set_put(master->slaves, link);
2089 if (r < 0)
2090 return r;
2091
2092 link_ref(link);
2093 return 0;
2094}
2095
2096static void link_drop_from_master(Link *link, NetDev *netdev) {
2097 Link *master;
2098
2099 assert(link);
2100
2101 if (!link->manager || !netdev)
2102 return;
2103
2104 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2105 return;
2106
2107 link_unref(set_remove(master->slaves, link));
2108}
2109
2110static void link_detach_from_manager(Link *link) {
2111 if (!link || !link->manager)
2112 return;
2113
2114 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2115 link_clean(link);
2116
2117 /* The following must be called at last. */
2118 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2119 link_unref(link);
2120}
2121
0d4ad91d
AR		 2122void link_drop(Link *link) {
2123 if (!link || link->state == LINK_STATE_LINGER)
2124 return;
2125
2126 link_set_state(link, LINK_STATE_LINGER);
2127
2128 link_free_carrier_maps(link);
2129
5f707e12
YW		 2130 if (link->network) {
2131 link_drop_from_master(link, link->network->bridge);
2132 link_drop_from_master(link, link->network->bond);
2133 }
2134
6a7a4e4d 2135 log_link_debug(link, "Link removed");
0d4ad91d 2136
db2f8a2e 2137 (void) unlink(link->state_file);
c4397d94 2138 link_detach_from_manager(link);
0d4ad91d
AR		 2139}
2140
3f265037 2141static int link_joined(Link *link) {
f882c247
TG		 2142 int r;
2143
ef1ba606 2144 assert(link);
f5be5601 2145 assert(link->network);
dd3efc09 2146
0d4ad91d
AR		 2147 if (!hashmap_isempty(link->bound_to_links)) {
2148 r = link_handle_bound_to_list(link);
2149 if (r < 0)
2150 return r;
2151 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2152 r = link_up(link);
2153 if (r < 0) {
2154 link_enter_failed(link);
2155 return r;
2156 }
ef1ba606 2157 }
f882c247 2158
9ed794a3 2159 if (link->network->bridge) {
e1853b00 2160 r = link_set_bridge(link);
6a7a4e4d
LP		 2161 if (r < 0)
2162 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 2163
2164 r = link_append_to_master(link, link->network->bridge);
2165 if (r < 0)
2166 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 2167 }
2168
eb64b435 2169 if (link->network->bond) {
7fcee284 2170 r = link_set_bond(link);
eb64b435
SS		 2171 if (r < 0)
2172 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2173
45e11abf 2174 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2175 if (r < 0)
2176 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2177 }
2178
ffff9abe
TJ		 2179 if (link->network->use_br_vlan &&
2180 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2181 r = link_set_bridge_vlan(link);
2182 if (r < 0)
2183 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2184 }
2185
c1835a42
RM		 2186 /* Skip setting up addresses until it gets carrier,
2187 or it would try to set addresses twice,
2188 which is bad for non-idempotent steps. */
dad2d78e 2189 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2190 return 0;
2191
289e6774 2192 return link_request_set_addresses(link);
02b59d57
TG		 2193}
2194
302a796f 2195static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2196 int r;
2197
1746cf2a 2198 assert(link);
ef1ba606 2199 assert(link->network);
34bf3c00 2200 assert(link->enslaving > 0);
02b59d57 2201
313cefa1 2202 link->enslaving--;
52433f6b 2203
5da8149f 2204 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2205 return 1;
2206
1c4baffc 2207 r = sd_netlink_message_get_errno(m);
856f962c 2208 if (r < 0 && r != -EEXIST) {
a2fae7bb 2209 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2210 link_enter_failed(link);
2211 return 1;
ba179154 2212 } else
6a7a4e4d 2213 log_link_debug(link, "Joined netdev");
02b59d57 2214
34bf3c00 2215 if (link->enslaving == 0) {
3f265037 2216 link_joined(link);
34bf3c00 2217 }
02b59d57
TG		 2218
2219 return 1;
2220}
2221
3f265037 2222static int link_enter_join_netdev(Link *link) {
6a0a2f86 2223 NetDev *netdev;
672682a6 2224 Iterator i;
02b59d57
TG		 2225 int r;
2226
2227 assert(link);
2228 assert(link->network);
bd08ce56 2229 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2230
289e6774 2231 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2232
84de38c5 2233 link_dirty(link);
34bf3c00 2234 link->enslaving = 0;
02b59d57 2235
d9c67ea1 2236 if (link->network->bond) {
cbff7170
TJ		 2237 if (link->network->bond->state == NETDEV_STATE_READY &&
2238 link->network->bond->ifindex == link->master_ifindex)
2239 return link_joined(link);
2240
f2341e0a
LP		 2241 log_struct(LOG_DEBUG,
2242 LOG_LINK_INTERFACE(link),
2243 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2244 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2245
34bf3c00
YW		 2246 link->enslaving++;
2247
f2341e0a 2248 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2249 if (r < 0) {
f2341e0a
LP		 2250 log_struct_errno(LOG_WARNING, r,
2251 LOG_LINK_INTERFACE(link),
2252 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2253 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2254 link_enter_failed(link);
2255 return r;
2256 }
0ad6148e
MO		 2257 }
2258
d9c67ea1 2259 if (link->network->bridge) {
f2341e0a
LP		 2260 log_struct(LOG_DEBUG,
2261 LOG_LINK_INTERFACE(link),
2262 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2263 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2264
34bf3c00
YW		 2265 link->enslaving++;
2266
f2341e0a 2267 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2268 if (r < 0) {
f2341e0a
LP		 2269 log_struct_errno(LOG_WARNING, r,
2270 LOG_LINK_INTERFACE(link),
2271 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2272 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2273 link_enter_failed(link);
2274 return r;
2275 }
52433f6b
TG		 2276 }
2277
6cb955c6
AR		 2278 if (link->network->vrf) {
2279 log_struct(LOG_DEBUG,
2280 LOG_LINK_INTERFACE(link),
2281 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2282 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2283
34bf3c00
YW		 2284 link->enslaving++;
2285
6cb955c6
AR		 2286 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2287 if (r < 0) {
2288 log_struct_errno(LOG_WARNING, r,
2289 LOG_LINK_INTERFACE(link),
2290 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2291 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2292 link_enter_failed(link);
2293 return r;
2294 }
6cb955c6
AR		 2295 }
2296
6a0a2f86 2297 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2298
2b6db913
YW		 2299 if (netdev->ifindex > 0)
2300 /* Assume already enslaved. */
a63e5daa 2301 continue;
a63e5daa 2302
7033af49
YW		 2303 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2304 continue;
2305
f2341e0a
LP		 2306 log_struct(LOG_DEBUG,
2307 LOG_LINK_INTERFACE(link),
2308 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2309 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2310
34bf3c00
YW		 2311 link->enslaving++;
2312
f2341e0a 2313 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2314 if (r < 0) {
f2341e0a
LP		 2315 log_struct_errno(LOG_WARNING, r,
2316 LOG_LINK_INTERFACE(link),
2317 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2318 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2319 link_enter_failed(link);
2320 return r;
2321 }
326cb406
SS		 2322 }
2323
34bf3c00
YW		 2324 if (link->enslaving == 0)
2325 return link_joined(link);
2326
ef1ba606
TG		 2327 return 0;
2328}
2329
769d324c 2330static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2331 int r;
2332
765afd5c 2333 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2334 return 0;
2335
765afd5c
LP		 2336 /* We propagate the forwarding flag from one interface to the
2337 * global setting one way. This means: as long as at least one
2338 * interface was configured at any time that had IP forwarding
2339 * enabled the setting will stay on for good. We do this
2340 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2341 * somewhat in sync (see below). */
15dee3f0 2342
62e021a9 2343 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2344 if (r < 0)
765afd5c 2345 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2346
769d324c
LP		 2347 return 0;
2348}
2349
2350static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2351 int r;
2352
765afd5c 2353 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2354 return 0;
2355
61233823 2356 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2357 * packet forwarding setting: either packet forwarding is on
2358 * for all, or off for all. We hence don't bother with a
2359 * per-interface setting, but simply propagate the interface
2360 * flag, if it is set, to the global flag, one-way. Note that
2361 * while IPv4 would allow a per-interface flag, we expose the
2362 * same behaviour there and also propagate the setting from
2363 * one to all, to keep things simple (see above). */
15dee3f0 2364
62e021a9 2365 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2366 if (r < 0)
765afd5c 2367 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2368
2369 return 0;
2370}
2371
49092e22 2372static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2373 IPv6PrivacyExtensions s;
49092e22
SS		 2374 int r;
2375
1f0d9695 2376 s = link_ipv6_privacy_extensions(link);
66a6bd68 2377 if (s < 0)
49092e22
SS		 2378 return 0;
2379
62e021a9 2380 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2381 if (r < 0)
49092e22
SS		 2382 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2383
2384 return 0;
2385}
2386
4f2e437a 2387static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2388 int r;
2389
2390 /* Make this a NOP if IPv6 is not available */
2391 if (!socket_ipv6_is_supported())
2392 return 0;
2393
2394 if (link->flags & IFF_LOOPBACK)
2395 return 0;
2396
d68e2e59
LP		 2397 if (!link->network)
2398 return 0;
2399
62e021a9 2400 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2401 if (r < 0)
fe307276 2402 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2403
2404 return 0;
2405}
2406
8749cbcd 2407static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2408 int r;
2409
2410 /* Make this a NOP if IPv6 is not available */
2411 if (!socket_ipv6_is_supported())
2412 return 0;
2413
2414 if (link->flags & IFF_LOOPBACK)
2415 return 0;
2416
d68e2e59
LP		 2417 if (!link->network)
2418 return 0;
2419
8749cbcd
SS		 2420 if (link->network->ipv6_dad_transmits < 0)
2421 return 0;
2422
62e021a9 2423 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2424 if (r < 0)
8749cbcd 2425 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2426
2427 return 0;
2428}
2429
b69c3180 2430static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2431 int r;
2432
2433 /* Make this a NOP if IPv6 is not available */
2434 if (!socket_ipv6_is_supported())
2435 return 0;
2436
2437 if (link->flags & IFF_LOOPBACK)
2438 return 0;
2439
d68e2e59
LP		 2440 if (!link->network)
2441 return 0;
2442
b69c3180
SS		 2443 if (link->network->ipv6_hop_limit < 0)
2444 return 0;
2445
62e021a9 2446 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2447 if (r < 0)
b69c3180 2448 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2449
2450 return 0;
2451}
2452
11102cba 2453static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2454 int r;
2455
2456 /* Make this a NOP if IPv6 is not available */
2457 if (!socket_ipv6_is_supported())
2458 return 0;
2459
2460 if (link->flags & IFF_LOOPBACK)
2461 return 0;
2462
2463 if (link->network->ipv6_mtu == 0)
2464 return 0;
2465
62e021a9 2466 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
11102cba
SS		 2467 if (r < 0)
2468 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2469
2470 return 0;
2471}
2472
30226d27
TJ		 2473static bool link_is_static_address_configured(Link *link, Address *address) {
2474 Address *net_address;
2475
2476 assert(link);
2477 assert(address);
2478
2479 if (!link->network)
2480 return false;
2481
2482 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2483 if (address_equal(net_address, address))
2484 return true;
2485
2486 return false;
2487}
2488
7ecf0c3e
TJ		 2489static bool link_is_static_route_configured(Link *link, Route *route) {
2490 Route *net_route;
2491
2492 assert(link);
2493 assert(route);
2494
2495 if (!link->network)
2496 return false;
2497
2498 LIST_FOREACH(routes, net_route, link->network->static_routes)
2499 if (route_equal(net_route, route))
2500 return true;
2501
2502 return false;
2503}
2504
5e5b137a
TG		 2505static int link_drop_foreign_config(Link *link) {
2506 Address *address;
2507 Route *route;
2508 Iterator i;
2509 int r;
2510
2511 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2512 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2513 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2514 continue;
2515
30226d27
TJ		 2516 if (link_is_static_address_configured(link, address)) {
2517 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2518 if (r < 0)
2519 return log_link_error_errno(link, r, "Failed to add address: %m");
2520 } else {
63ae0569 2521 r = address_remove(address, link, NULL);
30226d27
TJ		 2522 if (r < 0)
2523 return r;
2524 }
5e5b137a
TG		 2525 }
2526
2527 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2528 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2529 if (route->protocol == RTPROT_KERNEL)
2530 continue;
2531
7ecf0c3e
TJ		 2532 if (link_is_static_route_configured(link, route)) {
2533 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2534 if (r < 0)
2535 return r;
2536 } else {
4645ad47 2537 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2538 if (r < 0)
2539 return r;
2540 }
5e5b137a
TG		 2541 }
2542
2543 return 0;
2544}
2545
3104883d 2546static int link_drop_config(Link *link) {
410a7f15 2547 Address *address, *pool_address;
3104883d
SS		 2548 Route *route;
2549 Iterator i;
2550 int r;
2551
2552 SET_FOREACH(address, link->addresses, i) {
2553 /* we consider IPv6LL addresses to be managed by the kernel */
2554 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2555 continue;
2556
63ae0569 2557 r = address_remove(address, link, NULL);
3104883d
SS		 2558 if (r < 0)
2559 return r;
410a7f15
RM		 2560
2561 /* If this address came from an address pool, clean up the pool */
2562 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2563 if (address_equal(address, pool_address)) {
2564 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2565 address_free(pool_address);
2566 break;
2567 }
2568 }
3104883d
SS		 2569 }
2570
2571 SET_FOREACH(route, link->routes, i) {
2572 /* do not touch routes managed by the kernel */
2573 if (route->protocol == RTPROT_KERNEL)
2574 continue;
2575
4645ad47 2576 r = route_remove(route, link, NULL);
3104883d
SS		 2577 if (r < 0)
2578 return r;
2579 }
2580
c69305ff
LP		 2581 ndisc_flush(link);
2582
3104883d
SS		 2583 return 0;
2584}
2585
a748b692 2586static int link_configure(Link *link) {
02b59d57
TG		 2587 int r;
2588
ef1ba606 2589 assert(link);
b22d8a00 2590 assert(link->network);
bd08ce56 2591 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2592
06828bb6 2593 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
93ea7750 2594 return link_configure_can(link);
92c918b0 2595
02e28621
ДГ		 2596 /* Drop foreign config, but ignore loopback or critical devices.
2597 * We do not want to remove loopback address or addresses used for root NFS. */
2598 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 2599 r = link_drop_foreign_config(link);
2600 if (r < 0)
2601 return r;
2602 }
5e5b137a 2603
23d8b221
SS		 2604 r = link_set_proxy_arp(link);
2605 if (r < 0)
2606 return r;
2607
a0e5c15d
FK		 2608 r = ipv6_proxy_ndp_addresses_configure(link);
2609 if (r < 0)
2610 return r;
2611
769d324c
LP		 2612 r = link_set_ipv4_forward(link);
2613 if (r < 0)
2614 return r;
2615
2616 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2617 if (r < 0)
2618 return r;
2619
49092e22
SS		 2620 r = link_set_ipv6_privacy_extensions(link);
2621 if (r < 0)
2622 return r;
2623
4f2e437a
SS		 2624 r = link_set_ipv6_accept_ra(link);
2625 if (r < 0)
2626 return r;
2627
8749cbcd
SS		 2628 r = link_set_ipv6_dad_transmits(link);
2629 if (r < 0)
2630 return r;
b69c3180
SS		 2631
2632 r = link_set_ipv6_hop_limit(link);
2633 if (r < 0)
2634 return r;
8749cbcd 2635
99d2baa2
SS		 2636 r = link_set_flags(link);
2637 if (r < 0)
2638 return r;
2639
11102cba
SS		 2640 r = link_set_ipv6_mtu(link);
2641 if (r < 0)
2642 return r;
2643
8bc17bb3 2644 if (link_ipv4ll_enabled(link) || link_ipv4ll_fallback_enabled(link)) {
b22d8a00 2645 r = ipv4ll_configure(link);
eb34d4af
TG		 2646 if (r < 0)
2647 return r;
2648 }
2649
78c958f8 2650 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2651 r = dhcp4_set_promote_secondaries(link);
2652 if (r < 0)
2653 return r;
2654
3c9b8860 2655 r = dhcp4_configure(link);
eb34d4af
TG		 2656 if (r < 0)
2657 return r;
eb34d4af
TG		 2658 }
2659
78c958f8 2660 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2661 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2662 if (r < 0)
2663 return r;
2664
2665 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2666 if (r < 0)
2667 return r;
dd43110f
TG		 2668 }
2669
62379e88
TG		 2670 if (link_dhcp6_enabled(link) ||
2671 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2672 r = dhcp6_configure(link);
2673 if (r < 0)
2674 return r;
2675 }
2676
2677 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2678 r = ndisc_configure(link);
4138fb2c
PF		 2679 if (r < 0)
2680 return r;
2681 }
2682
7465dd22
PF		 2683 if (link_radv_enabled(link)) {
2684 r = radv_configure(link);
2685 if (r < 0)
2686 return r;
2687 }
2688
8e1ad1ea 2689 if (link_lldp_rx_enabled(link)) {
7f853950 2690 r = link_lldp_rx_configure(link);
273eec24
LP		 2691 if (r < 0)
2692 return r;
ce43e484
SS		 2693 }
2694
f6fcc1c2 2695 r = link_configure_mtu(link);
40288ece
YW		 2696 if (r < 0)
2697 return r;
44b598a1 2698
9f6e82e6
YW		 2699 r = link_configure_addrgen_mode(link);
2700 if (r < 0)
2701 return r;
0e2fdb83 2702
55dc8c4a
YW		 2703 return link_configure_after_setting_mtu(link);
2704}
2705
2706static int link_configure_after_setting_mtu(Link *link) {
2707 int r;
2708
2709 assert(link);
2710 assert(link->network);
bd08ce56 2711 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a
YW		 2712
2713 if (link->setting_mtu)
2714 return 0;
2715
dad2d78e 2716 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2717 r = link_acquire_conf(link);
2718 if (r < 0)
2719 return r;
cc544d5f 2720 }
1e9be60b 2721
3f265037 2722 return link_enter_join_netdev(link);
505f8da7
TG		 2723}
2724
27dfc982
YW		 2725static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2726 assert(duid);
2727
2728 if (duid->raw_data_len > 0)
2729 return 0;
2730
2731 if (duid->type != DUID_TYPE_UUID)
2732 return -EINVAL;
2733
2734 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2735 duid->raw_data_len = sizeof(sd_id128_t);
2736
2737 return 1;
2738}
2739
2740int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2741 Manager *manager = userdata;
2742 const sd_bus_error *e;
2743 const void *a;
2744 size_t sz;
2745 DUID *duid;
2746 Link *link;
2747 int r;
2748
2749 assert(m);
2750 assert(manager);
2751
2752 e = sd_bus_message_get_error(m);
2753 if (e) {
2754 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 2755 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 2756 e->message);
2757 goto configure;
2758 }
2759
2760 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2761 if (r < 0)
2762 goto configure;
2763
2764 if (sz != sizeof(sd_id128_t)) {
ab4dd984 2765 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 2766 goto configure;
2767 }
2768
2769 memcpy(&manager->product_uuid, a, sz);
2770 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2771 (void) duid_set_uuid(duid, manager->product_uuid);
2772
2773 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2774
2775configure:
2776 while ((link = set_steal_first(manager->links_requesting_uuid))) {
2777 r = link_configure(link);
2778 if (r < 0)
2779 log_link_error_errno(link, r, "Failed to configure link: %m");
2780 }
2781
2782 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
2783
2784 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2785 * even if the method fails. */
2786 manager->has_product_uuid = true;
2787
2788 return 1;
2789}
2790
2791static bool link_requires_uuid(Link *link) {
2792 const DUID *duid;
2793
2794 assert(link);
2795 assert(link->manager);
2796 assert(link->network);
2797
2798 duid = link_get_duid(link);
2799 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
2800 return false;
2801
2802 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
2803 return true;
2804
2805 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
2806 return true;
2807
2808 return false;
2809}
2810
2811static int link_configure_duid(Link *link) {
2812 Manager *m;
2813 DUID *duid;
2814 int r;
2815
2816 assert(link);
2817 assert(link->manager);
2818 assert(link->network);
2819
2820 m = link->manager;
2821 duid = link_get_duid(link);
2822
2823 if (!link_requires_uuid(link))
2824 return 1;
2825
2826 if (m->has_product_uuid) {
2827 (void) duid_set_uuid(duid, m->product_uuid);
2828 return 1;
2829 }
2830
2831 if (!m->links_requesting_uuid) {
2832 r = manager_request_product_uuid(m, link);
2833 if (r < 0) {
2834 if (r == -ENOMEM)
2835 return r;
2836
ab4dd984
ZJS		 2837 log_link_warning_errno(link, r,
2838 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 2839 return 1;
2840 }
2841 } else {
2842 r = set_put(m->links_requesting_uuid, link);
2843 if (r < 0)
2844 return log_oom();
2845
2846 r = set_put(m->duids_requesting_uuid, duid);
2847 if (r < 0)
2848 return log_oom();
2849 }
2850
2851 return 0;
2852}
2853
e6bf7774 2854static int link_initialized_and_synced(Link *link) {
505f8da7 2855 Network *network;
505f8da7
TG		 2856 int r;
2857
2858 assert(link);
2859 assert(link->ifname);
2860 assert(link->manager);
2861
bd08ce56
YW		 2862 /* We may get called either from the asynchronous netlink callback,
2863 * or directly for link_add() if running in a container. See link_add(). */
2864 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2865 return 0;
505f8da7 2866
6a7a4e4d 2867 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2868 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2869
0d4ad91d
AR		 2870 r = link_new_bound_by_list(link);
2871 if (r < 0)
2872 return r;
2873
2874 r = link_handle_bound_by_list(link);
2875 if (r < 0)
2876 return r;
2877
c4a03a56 2878 if (!link->network) {
51517f9e 2879 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 2880 &link->mac, &network);
2881 if (r == -ENOENT) {
2882 link_enter_unmanaged(link);
4232cf04 2883 return 0;
a09dc546
DM		 2884 } else if (r == 0 && network->unmanaged) {
2885 link_enter_unmanaged(link);
2886 return 0;
c4a03a56
TG		 2887 } else if (r < 0)
2888 return r;
505f8da7 2889
c4a03a56
TG		 2890 if (link->flags & IFF_LOOPBACK) {
2891 if (network->link_local != ADDRESS_FAMILY_NO)
2892 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2893
c4a03a56
TG		 2894 if (network->dhcp != ADDRESS_FAMILY_NO)
2895 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2896
c4a03a56
TG		 2897 if (network->dhcp_server)
2898 log_link_debug(link, "Ignoring DHCP server for loopback link");
2899 }
bd2efe92 2900
7d342c03 2901 r = network_apply(network, link);
c4a03a56
TG		 2902 if (r < 0)
2903 return r;
2904 }
505f8da7 2905
0d4ad91d
AR		 2906 r = link_new_bound_to_list(link);
2907 if (r < 0)
2908 return r;
2909
27dfc982
YW		 2910 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2911 * link_configure() is called later asynchronously. */
2912 r = link_configure_duid(link);
2913 if (r <= 0)
2914 return r;
2915
a748b692
TG		 2916 r = link_configure(link);
2917 if (r < 0)
2918 return r;
2919
4232cf04 2920 return 0;
505f8da7
TG		 2921}
2922
302a796f
YW		 2923static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2924 (void) link_initialized_and_synced(link);
e6bf7774
YW		 2925 return 1;
2926}
2927
51517f9e 2928int link_initialized(Link *link, sd_device *device) {
4afd3348 2929 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2930 int r;
2931
2932 assert(link);
2933 assert(link->manager);
2934 assert(link->manager->rtnl);
2935 assert(device);
2936
8434fd5c 2937 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2938 return 0;
2939
51517f9e 2940 if (link->sd_device)
679b3605
TG		 2941 return 0;
2942
79008bdd 2943 log_link_debug(link, "udev initialized link");
bd08ce56 2944 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 2945
51517f9e 2946 link->sd_device = sd_device_ref(device);
4f561e8e 2947
3c9b8860
TG		 2948 /* udev has initialized the link, but we don't know if we have yet
2949 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2950 * when it returns we know that the pending NEWLINKs have already been
2951 * processed and that we are up-to-date */
4f561e8e 2952
3c9b8860
TG		 2953 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2954 link->ifindex);
4f561e8e
TG		 2955 if (r < 0)
2956 return r;
2957
302a796f
YW		 2958 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
2959 link_netlink_destroy_callback, link);
4f561e8e
TG		 2960 if (r < 0)
2961 return r;
2962
5da8149f
TG		 2963 link_ref(link);
2964
4f561e8e
TG		 2965 return 0;
2966}
2967
c4a03a56 2968static int link_load(Link *link) {
0bc70f1d
TG		 2969 _cleanup_free_ char *network_file = NULL,
2970 *addresses = NULL,
f703cc2c 2971 *routes = NULL,
0bc70f1d
TG		 2972 *dhcp4_address = NULL,
2973 *ipv4ll_address = NULL;
2974 union in_addr_union address;
f703cc2c 2975 union in_addr_union route_dst;
c598ac76 2976 const char *p;
c4a03a56
TG		 2977 int r;
2978
2979 assert(link);
2980
aa8fbc74 2981 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 2982 "NETWORK_FILE", &network_file,
2983 "ADDRESSES", &addresses,
f703cc2c 2984 "ROUTES", &routes,
0bc70f1d 2985 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 2986 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 2987 if (r < 0 && r != -ENOENT)
2988 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
2989
2990 if (network_file) {
2991 Network *network;
2992 char *suffix;
2993
2994 /* drop suffix */
2995 suffix = strrchr(network_file, '.');
2996 if (!suffix) {
2997 log_link_debug(link, "Failed to get network name from %s", network_file);
2998 goto network_file_fail;
2999 }
3000 *suffix = '\0';
3001
3002 r = network_get_by_name(link->manager, basename(network_file), &network);
3003 if (r < 0) {
3004 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3005 goto network_file_fail;
3006 }
3007
7d342c03 3008 r = network_apply(network, link);
c4a03a56
TG		 3009 if (r < 0)
3010 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3011 }
3012
3013network_file_fail:
3014
3015 if (addresses) {
c598ac76 3016 p = addresses;
c4a03a56 3017
c598ac76
TG		 3018 for (;;) {
3019 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3020 char *prefixlen_str;
3021 int family;
3022 unsigned char prefixlen;
c4a03a56 3023
c598ac76
TG		 3024 r = extract_first_word(&p, &address_str, NULL, 0);
3025 if (r < 0) {
3026 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3027 continue;
928bc597
TA		 3028 }
3029 if (r == 0)
c598ac76
TG		 3030 break;
3031
3032 prefixlen_str = strchr(address_str, '/');
c4a03a56 3033 if (!prefixlen_str) {
c598ac76 3034 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3035 continue;
3036 }
3037
313cefa1 3038 *prefixlen_str++ = '\0';
c4a03a56
TG		 3039
3040 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3041 if (r != 1) {
3042 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3043 continue;
3044 }
3045
c598ac76 3046 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3047 if (r < 0) {
c598ac76 3048 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3049 continue;
3050 }
3051
3052 r = address_add(link, family, &address, prefixlen, NULL);
3053 if (r < 0)
3054 return log_link_error_errno(link, r, "Failed to add address: %m");
3055 }
3056 }
3057
f703cc2c 3058 if (routes) {
74544b4e
TA		 3059 p = routes;
3060
c598ac76 3061 for (;;) {
f833694d 3062 Route *route;
c598ac76 3063 _cleanup_free_ char *route_str = NULL;
4afd3348 3064 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 3065 usec_t lifetime;
f703cc2c
TG		 3066 char *prefixlen_str;
3067 int family;
3068 unsigned char prefixlen, tos, table;
3069 uint32_t priority;
3070
c598ac76
TG		 3071 r = extract_first_word(&p, &route_str, NULL, 0);
3072 if (r < 0) {
3073 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3074 continue;
928bc597
TA		 3075 }
3076 if (r == 0)
c598ac76
TG		 3077 break;
3078
3079 prefixlen_str = strchr(route_str, '/');
f703cc2c 3080 if (!prefixlen_str) {
c598ac76 3081 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3082 continue;
3083 }
3084
313cefa1 3085 *prefixlen_str++ = '\0';
f703cc2c 3086
f833694d
TG		 3087 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3088 if (r != 5) {
3089 log_link_debug(link,
3090 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3091 prefixlen_str);
f703cc2c
TG		 3092 continue;
3093 }
3094
c598ac76 3095 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3096 if (r < 0) {
c598ac76 3097 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3098 continue;
3099 }
3100
f833694d 3101 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3102 if (r < 0)
3103 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3104
f02ba163 3105 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3106 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3107 0, route_expire_handler, route);
3108 if (r < 0)
3109 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3110 }
3111
3112 route->lifetime = lifetime;
3113 sd_event_source_unref(route->expire);
1cc6c93a 3114 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3115 }
3116 }
3117
0bc70f1d
TG		 3118 if (dhcp4_address) {
3119 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3120 if (r < 0) {
b68d26b8 3121 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3122 goto dhcp4_address_fail;
3123 }
3124
b1c626f6 3125 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3126 if (r < 0)
b68d26b8 3127 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3128
3129 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3130 if (r < 0)
b68d26b8 3131 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3132 }
3133
3134dhcp4_address_fail:
3135
3136 if (ipv4ll_address) {
3137 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3138 if (r < 0) {
b68d26b8 3139 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3140 goto ipv4ll_address_fail;
3141 }
3142
3143 r = sd_ipv4ll_new(&link->ipv4ll);
3144 if (r < 0)
b68d26b8 3145 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3146
3147 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3148 if (r < 0)
b68d26b8 3149 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3150 }
3151
3152ipv4ll_address_fail:
3153
c4a03a56
TG		 3154 return 0;
3155}
3156
1c4baffc 3157int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3158 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3159 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3160 Link *link;
5a937ea2 3161 int r;
505f8da7
TG		 3162
3163 assert(m);
fbbeb65a 3164 assert(m->rtnl);
505f8da7
TG		 3165 assert(message);
3166 assert(ret);
3167
3168 r = link_new(m, message, ret);
3169 if (r < 0)
3170 return r;
3171
3172 link = *ret;
3173
6a7a4e4d 3174 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3175
c4a03a56
TG		 3176 r = link_load(link);
3177 if (r < 0)
3178 return r;
3179
75f86906 3180 if (detect_container() <= 0) {
505f8da7 3181 /* not in a container, udev will be around */
ae06ab10 3182 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3183 r = sd_device_new_from_device_id(&device, ifindex_str);
3184 if (r < 0) {
3185 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3186 goto failed;
3187 }
505f8da7 3188
5a937ea2 3189 r = sd_device_get_is_initialized(device);
51517f9e
YW		 3190 if (r < 0) {
3191 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3192 goto failed;
3193 }
5a937ea2 3194 if (r == 0) {
505f8da7 3195 /* not yet ready */
79008bdd 3196 log_link_debug(link, "link pending udev initialization...");
505f8da7 3197 return 0;
3c4cb064 3198 }
505f8da7 3199
299ad32d
YW		 3200 r = device_is_renaming(device);
3201 if (r < 0) {
3202 log_link_warning_errno(link, r, "Failed to determine the device is renamed or not: %m");
3203 goto failed;
3204 }
3205 if (r > 0) {
3206 log_link_debug(link, "Interface is under renaming, pending initialization.");
3207 return 0;
3208 }
3209
4f561e8e
TG		 3210 r = link_initialized(link, device);
3211 if (r < 0)
5c416fc4 3212 goto failed;
4f561e8e 3213 } else {
e6bf7774 3214 r = link_initialized_and_synced(link);
4f561e8e 3215 if (r < 0)
5c416fc4 3216 goto failed;
4f561e8e 3217 }
505f8da7 3218
a748b692 3219 return 0;
5c416fc4
TG		 3220failed:
3221 link_enter_failed(link);
3222 return r;
a748b692
TG		 3223}
3224
c601ebf7 3225int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3226 int r;
3227
3228 assert(link);
3229
3230 log_link_info(link, "Gained IPv6LL");
3231
c601ebf7 3232 link->ipv6ll_address = *address;
e7ab854c
TG		 3233 link_check_ready(link);
3234
b9ea3d2e 3235 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3236 r = link_acquire_ipv6_conf(link);
3237 if (r < 0) {
3238 link_enter_failed(link);
3239 return r;
3240 }
3241 }
3242
3243 return 0;
3244}
3245
9c0a72f9
TG		 3246static int link_carrier_gained(Link *link) {
3247 int r;
3248
3249 assert(link);
3250
b9ea3d2e 3251 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3252 r = link_acquire_conf(link);
3253 if (r < 0) {
3254 link_enter_failed(link);
3255 return r;
3256 }
6fc25497 3257
289e6774 3258 r = link_request_set_addresses(link);
6fc25497
SS		 3259 if (r < 0)
3260 return r;
9c0a72f9
TG		 3261 }
3262
0d4ad91d
AR		 3263 r = link_handle_bound_by_list(link);
3264 if (r < 0)
3265 return r;
3266
9c0a72f9
TG		 3267 return 0;
3268}
3269
3270static int link_carrier_lost(Link *link) {
3271 int r;
3272
3273 assert(link);
3274
25e992ba 3275 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3276 return 0;
3277
fbdb6605 3278 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3279 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3280 * configuration and stop the clients as well. */
97e7fb39
SS		 3281 if (link->setting_mtu)
3282 return 0;
3283
9c0a72f9
TG		 3284 r = link_stop_clients(link);
3285 if (r < 0) {
3286 link_enter_failed(link);
3287 return r;
3288 }
3289
28464ae0
SS		 3290 if (link_dhcp4_server_enabled(link))
3291 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3292
3104883d
SS		 3293 r = link_drop_config(link);
3294 if (r < 0)
3295 return r;
3296
f258e948
MP		 3297 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3298 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3299 r = link_drop_foreign_config(link);
3300 if (r < 0)
3301 return r;
3302 }
3104883d 3303
0d4ad91d
AR		 3304 r = link_handle_bound_by_list(link);
3305 if (r < 0)
3306 return r;
3307
9c0a72f9
TG		 3308 return 0;
3309}
3310
3311int link_carrier_reset(Link *link) {
3312 int r;
3313
3314 assert(link);
3315
3316 if (link_has_carrier(link)) {
3317 r = link_carrier_lost(link);
3318 if (r < 0)
3319 return r;
3320
3321 r = link_carrier_gained(link);
3322 if (r < 0)
3323 return r;
3324
6a7a4e4d 3325 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3326 }
3327
3328 return 0;
3329}
3330
1c4baffc 3331int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3332 struct ether_addr mac;
ca4e095a 3333 const char *ifname;
afe7fd56 3334 uint32_t mtu;
a61bb41c 3335 bool had_carrier, carrier_gained, carrier_lost;
bb262ef0 3336 int old_master, r;
22936833 3337
dd3efc09 3338 assert(link);
b8941f74 3339 assert(link->ifname);
22936833
TG		 3340 assert(m);
3341
7619683b 3342 if (link->state == LINK_STATE_LINGER) {
5238e957 3343 log_link_info(link, "Link re-added");
289e6774 3344 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3345
3346 r = link_new_carrier_maps(link);
3347 if (r < 0)
3348 return r;
7619683b
TG		 3349 }
3350
1c4baffc 3351 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3352 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3353 Manager *manager = link->manager;
b8941f74 3354
30de2b89 3355 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3356
30de2b89
YW		 3357 link_drop(link);
3358 r = link_add(manager, m, &link);
3359 if (r < 0)
3360 return r;
b8941f74
TG		 3361 }
3362
1c4baffc 3363 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3364 if (r >= 0 && mtu > 0) {
3365 link->mtu = mtu;
4e964aa0 3366 if (link->original_mtu == 0) {
afe7fd56 3367 link->original_mtu = mtu;
6a7a4e4d 3368 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3369 }
3370
3371 if (link->dhcp_client) {
3c9b8860
TG		 3372 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3373 link->mtu);
fc95c359
YW		 3374 if (r < 0)
3375 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3376 }
7465dd22
PF		 3377
3378 if (link->radv) {
3379 r = sd_radv_set_mtu(link->radv, link->mtu);
3380 if (r < 0)
3381 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3382 }
9842de0d 3383 }
69629de9 3384
e9189a1f
TG		 3385 /* The kernel may broadcast NEWLINK messages without the MAC address
3386 set, simply ignore them. */
1c4baffc 3387 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3388 if (r >= 0) {
3c9b8860
TG		 3389 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3390 ETH_ALEN)) {
c49b33ac 3391
3c9b8860
TG		 3392 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3393 ETH_ALEN);
c49b33ac 3394
79008bdd 3395 log_link_debug(link, "MAC address: "
20861203
TG		 3396 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3397 mac.ether_addr_octet[0],
3398 mac.ether_addr_octet[1],
3399 mac.ether_addr_octet[2],
3400 mac.ether_addr_octet[3],
3401 mac.ether_addr_octet[4],
3402 mac.ether_addr_octet[5]);
c49b33ac 3403
20861203
TG		 3404 if (link->ipv4ll) {
3405 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3406 if (r < 0)
3407 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3408 }
c49b33ac 3409
20861203 3410 if (link->dhcp_client) {
3c9b8860 3411 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3412 (const uint8_t *) &link->mac,
3413 sizeof (link->mac),
3414 ARPHRD_ETHER);
6a7a4e4d
LP		 3415 if (r < 0)
3416 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3417
fff1f40c
YW		 3418 r = dhcp4_set_client_identifier(link);
3419 if (r < 0)
3420 return r;
c49b33ac 3421 }
4138fb2c
PF		 3422
3423 if (link->dhcp6_client) {
f24648a6 3424 const DUID* duid = link_get_duid(link);
8341a5c3 3425
4138fb2c 3426 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3427 (const uint8_t *) &link->mac,
3428 sizeof (link->mac),
3429 ARPHRD_ETHER);
6a7a4e4d
LP		 3430 if (r < 0)
3431 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3432
8217ed5e
TH		 3433 if (link->network->iaid_set) {
3434 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3435 link->network->iaid);
3436 if (r < 0)
3437 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3438 }
413708d1 3439
8341a5c3
ZJS		 3440 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3441 duid->type,
3442 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3443 duid->raw_data_len);
413708d1
VK		 3444 if (r < 0)
3445 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3446 }
7465dd22
PF		 3447
3448 if (link->radv) {
3449 r = sd_radv_set_mac(link->radv, &link->mac);
3450 if (r < 0)
3451 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3452 }
420d2058
SS		 3453
3454 if (link->ndisc) {
3455 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3456 if (r < 0)
3457 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3458 }
c49b33ac 3459 }
4f882b2a
TG		 3460 }
3461
bb262ef0
YW		 3462 old_master = link->master_ifindex;
3463 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
3464
a61bb41c
TG		 3465 had_carrier = link_has_carrier(link);
3466
bb262ef0 3467 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 3468 if (r < 0)
3469 return r;
3470
273eec24
LP		 3471 r = link_update_lldp(link);
3472 if (r < 0)
3473 return r;
3474
a61bb41c
TG		 3475 carrier_gained = !had_carrier && link_has_carrier(link);
3476 carrier_lost = had_carrier && !link_has_carrier(link);
3477
3478 if (carrier_gained) {
6a7a4e4d 3479 log_link_info(link, "Gained carrier");
a61bb41c 3480
9c0a72f9
TG		 3481 r = link_carrier_gained(link);
3482 if (r < 0)
3483 return r;
a61bb41c 3484 } else if (carrier_lost) {
6a7a4e4d 3485 log_link_info(link, "Lost carrier");
a61bb41c 3486
9c0a72f9
TG		 3487 r = link_carrier_lost(link);
3488 if (r < 0)
a61bb41c 3489 return r;
a61bb41c
TG		 3490 }
3491
3492 return 0;
dd3efc09 3493}
fe8db0c5 3494
b295beea
LP		 3495static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3496 bool space = false;
3497 Iterator i;
3498 Link *link;
3499
3500 assert(f);
3501 assert(prefix);
3502
3503 if (hashmap_isempty(h))
3504 return;
3505
0d536673 3506 fputs(prefix, f);
b295beea
LP		 3507 HASHMAP_FOREACH(link, h, i) {
3508 if (space)
0d536673 3509 fputc(' ', f);
b295beea
LP		 3510
3511 fprintf(f, "%i", link->ifindex);
3512 space = true;
3513 }
3514
0d536673 3515 fputc('\n', f);
b295beea
LP		 3516}
3517
fe8db0c5 3518int link_save(Link *link) {
68a8723c 3519 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3520 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3521 const char *admin_state, *oper_state;
e7780c8d 3522 Address *a;
c1eb9872 3523 Route *route;
e7780c8d 3524 Iterator i;
fe8db0c5
TG		 3525 int r;
3526
3527 assert(link);
3528 assert(link->state_file);
68a8723c 3529 assert(link->lease_file);
bbf7c048
TG		 3530 assert(link->manager);
3531
370e9930 3532 if (link->state == LINK_STATE_LINGER) {
6990fb6b 3533 (void) unlink(link->state_file);
370e9930
TG		 3534 return 0;
3535 }
3536
34437b4f
LP		 3537 link_lldp_save(link);
3538
deb2e523
TG		 3539 admin_state = link_state_to_string(link->state);
3540 assert(admin_state);
3541
e375dcde
TG		 3542 oper_state = link_operstate_to_string(link->operstate);
3543 assert(oper_state);
deb2e523 3544
fe8db0c5
TG		 3545 r = fopen_temporary(link->state_file, &f, &temp_path);
3546 if (r < 0)
6a7a4e4d 3547 goto fail;
fe8db0c5 3548
5512a963 3549 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3550
3551 fprintf(f,
3552 "# This is private data. Do not parse.\n"
deb2e523 3553 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3554 "OPER_STATE=%s\n",
3555 admin_state, oper_state);
fe8db0c5 3556
bcb7a07e 3557 if (link->network) {
fe0e16db
YW		 3558 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
3559 const char *dhcp_domainname = NULL, *p;
07bdc70d 3560 sd_dhcp6_lease *dhcp6_lease = NULL;
5512a963 3561 unsigned j;
fe0e16db 3562 bool space;
07bdc70d 3563
c1a38904
MTL		 3564 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3565 yes_no(link->network->required_for_online));
3566
4ac77d63
YW		 3567 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s\n",
3568 strempty(link_operstate_to_string(link->network->required_operstate_for_online)));
3569
07bdc70d 3570 if (link->dhcp6_client) {
4058d339
TG		 3571 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3572 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3573 log_link_debug(link, "No DHCPv6 lease");
3574 }
b0e39c82 3575
adc5b2e2
TG		 3576 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3577
0d536673 3578 fputs("DNS=", f);
ea352b40 3579 space = false;
5512a963
LP		 3580
3581 for (j = 0; j < link->network->n_dns; j++) {
3582 _cleanup_free_ char *b = NULL;
3583
3584 r = in_addr_to_string(link->network->dns[j].family,
3585 &link->network->dns[j].address, &b);
3586 if (r < 0) {
3587 log_debug_errno(r, "Failed to format address, ignoring: %m");
3588 continue;
3589 }
3590
3591 if (space)
0d536673
LP		 3592 fputc(' ', f);
3593 fputs(b, f);
5512a963
LP		 3594 space = true;
3595 }
d5314fff 3596
27cb34f5 3597 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3598 link->dhcp_lease) {
3599 const struct in_addr *addresses;
3600
3601 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
072320ea
TH		 3602 if (r > 0)
3603 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3604 space = true;
07bdc70d
PF		 3605 }
3606
27cb34f5 3607 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3608 struct in6_addr *in6_addrs;
3609
3610 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3611 if (r > 0) {
3612 if (space)
0d536673 3613 fputc(' ', f);
07bdc70d 3614 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3615 space = true;
3616 }
3617 }
3618
3619 /* Make sure to flush out old entries before we use the NDISC data */
3620 ndisc_vacuum(link);
3621
b296797f 3622 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3623 NDiscRDNSS *dd;
3624
3625 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3626 if (space)
0d536673 3627 fputc(' ', f);
1e7a0e21
LP		 3628
3629 serialize_in6_addrs(f, &dd->address, 1);
3630 space = true;
b0e39c82
TG		 3631 }
3632 }
3633
0d536673 3634 fputc('\n', f);
b0e39c82 3635
0d536673 3636 fputs("NTP=", f);
ea352b40 3637 space = false;
3df9bec5 3638 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3639
27cb34f5 3640 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3641 link->dhcp_lease) {
3642 const struct in_addr *addresses;
3643
3644 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
072320ea
TH		 3645 if (r > 0)
3646 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3647 space = true;
07bdc70d
PF		 3648 }
3649
27cb34f5 3650 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3651 struct in6_addr *in6_addrs;
3652 char **hosts;
07bdc70d
PF		 3653
3654 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3655 &in6_addrs);
3656 if (r > 0) {
3657 if (space)
0d536673 3658 fputc(' ', f);
07bdc70d
PF		 3659 serialize_in6_addrs(f, in6_addrs, r);
3660 space = true;
3661 }
3662
3663 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3664 if (r > 0)
3665 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3666 }
3667
0d536673 3668 fputc('\n', f);
bd8f6538 3669
b2a81c0b 3670 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3671 if (link->dhcp_lease) {
b2a81c0b 3672 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3673 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3674 }
b2a81c0b
LP		 3675 if (dhcp6_lease)
3676 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3677 }
3678
fe0e16db
YW		 3679 fputs("DOMAINS=", f);
3680 space = false;
3681 ORDERED_SET_FOREACH(p, link->network->search_domains, i)
3682 fputs_with_space(f, p, NULL, &space);
07bdc70d 3683
1e7a0e21
LP		 3684 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3685 NDiscDNSSL *dd;
9b4d1882 3686
1e7a0e21
LP		 3687 if (dhcp_domainname)
3688 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3689 if (dhcp_domains)
3690 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3691 if (dhcp6_domains)
3692 fputstrv(f, dhcp6_domains, NULL, &space);
3693
3694 SET_FOREACH(dd, link->ndisc_dnssl, i)
3695 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3696 }
b2a81c0b 3697
0d536673 3698 fputc('\n', f);
6192b846 3699
fe0e16db
YW		 3700 fputs("ROUTE_DOMAINS=", f);
3701 space = false;
3702 ORDERED_SET_FOREACH(p, link->network->route_domains, i)
3703 fputs_with_space(f, p, NULL, &space);
b2a81c0b 3704
1e7a0e21
LP		 3705 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3706 NDiscDNSSL *dd;
b2a81c0b 3707
1e7a0e21
LP		 3708 if (dhcp_domainname)
3709 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3710 if (dhcp_domains)
3711 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3712 if (dhcp6_domains)
3713 fputstrv(f, dhcp6_domains, NULL, &space);
3714
3715 SET_FOREACH(dd, link->ndisc_dnssl, i)
3716 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3717 }
b2a81c0b 3718
0d536673 3719 fputc('\n', f);
67272d15 3720
3c9b8860 3721 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3722 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3723 fprintf(f, "MDNS=%s\n",
3724 resolve_support_to_string(link->network->mdns));
7ece6f58
LP		 3725 if (link->network->dns_default_route >= 0)
3726 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
e7780c8d 3727
c9299be2
IT		 3728 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3729 fprintf(f, "DNS_OVER_TLS=%s\n",
3730 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 3731
ad6c0475
LP		 3732 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3733 fprintf(f, "DNSSEC=%s\n",
3734 dnssec_mode_to_string(link->network->dnssec_mode));
3735
8a516214
LP		 3736 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3737 const char *n;
3738
0d536673 3739 fputs("DNSSEC_NTA=", f);
8a516214 3740 space = false;
d390f8ef
LP		 3741 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3742 fputs_with_space(f, n, NULL, &space);
0d536673 3743 fputc('\n', f);
8a516214
LP		 3744 }
3745
0d536673 3746 fputs("ADDRESSES=", f);
e7780c8d
TG		 3747 space = false;
3748 SET_FOREACH(a, link->addresses, i) {
3749 _cleanup_free_ char *address_str = NULL;
3750
3751 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3752 if (r < 0)
3753 goto fail;
3754
e7780c8d
TG		 3755 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3756 space = true;
3757 }
0d536673 3758 fputc('\n', f);
c1eb9872 3759
0d536673 3760 fputs("ROUTES=", f);
c1eb9872
TG		 3761 space = false;
3762 SET_FOREACH(route, link->routes, i) {
3763 _cleanup_free_ char *route_str = NULL;
3764
3765 r = in_addr_to_string(route->family, &route->dst, &route_str);
3766 if (r < 0)
3767 goto fail;
3768
ecc3f340
ZJS		 3769 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3770 space ? " " : "", route_str,
f833694d 3771 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3772 space = true;
3773 }
3774
0d536673 3775 fputc('\n', f);
bcb7a07e 3776 }
7374f9d8 3777
b295beea
LP		 3778 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3779 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3780
8eb9058d 3781 if (link->dhcp_lease) {
0bc70f1d 3782 struct in_addr address;
8eb9058d
LP		 3783 const char *tz = NULL;
3784
0bc70f1d
TG		 3785 assert(link->network);
3786
8eb9058d
LP		 3787 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3788 if (r >= 0)
3789 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3790
0bc70f1d
TG		 3791 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3792 if (r >= 0) {
0d536673 3793 fputs("DHCP4_ADDRESS=", f);
072320ea 3794 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3795 fputc('\n', f);
0bc70f1d 3796 }
d9876a52 3797
bd91b83e 3798 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3799 if (r < 0)
c2d6bd61 3800 goto fail;
fe8db0c5 3801
7374f9d8 3802 fprintf(f,
b0e39c82
TG		 3803 "DHCP_LEASE=%s\n",
3804 link->lease_file);
deb2e523 3805 } else
6990fb6b 3806 (void) unlink(link->lease_file);
fe8db0c5 3807
0bc70f1d
TG		 3808 if (link->ipv4ll) {
3809 struct in_addr address;
3810
3811 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3812 if (r >= 0) {
0d536673 3813 fputs("IPV4LL_ADDRESS=", f);
072320ea 3814 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3815 fputc('\n', f);
0bc70f1d
TG		 3816 }
3817 }
3818
c2d6bd61
LP		 3819 r = fflush_and_check(f);
3820 if (r < 0)
3821 goto fail;
fe8db0c5 3822
c2d6bd61 3823 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3824 r = -errno;
c2d6bd61 3825 goto fail;
fe8db0c5
TG		 3826 }
3827
c2d6bd61 3828 return 0;
dacd6cee 3829
c2d6bd61 3830fail:
6a7a4e4d 3831 (void) unlink(link->state_file);
6a7a4e4d
LP		 3832 if (temp_path)
3833 (void) unlink(temp_path);
3834
dacd6cee 3835 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3836}
3837
84de38c5
TG		 3838/* The serialized state in /run is no longer up-to-date. */
3839void link_dirty(Link *link) {
3840 int r;
3841
3842 assert(link);
3843
0c241a37
SS		 3844 /* mark manager dirty as link is dirty */
3845 manager_dirty(link->manager);
3846
84de38c5
TG		 3847 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
3848 if (r < 0)
3849 /* allocation errors are ignored */
3850 return;
3851
3852 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 3853 if (r <= 0)
3854 /* don't take another ref if the link was already dirty */
84de38c5
TG		 3855 return;
3856
3857 link_ref(link);
3858}
3859
3860/* The serialized state in /run is up-to-date */
3861void link_clean(Link *link) {
3862 assert(link);
3863 assert(link->manager);
3864
1046bf9b 3865 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 3866}
3867
fe8db0c5 3868static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3869 [LINK_STATE_PENDING] = "pending",
bd08ce56 3870 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 3871 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 3872 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3873 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3874 [LINK_STATE_FAILED] = "failed",
370e9930 3875 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3876};
3877
3878DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
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