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test-user-util: add simple test for make_salt()
[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
cab042b8 80 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
af9ba57a
YW		 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
cab042b8 101 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
af9ba57a
YW		 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
cab042b8 119 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
af9ba57a
YW		 120 return false;
121
78c958f8
TG		 122 return link->network->dhcp_server;
123}
124
910feb78 125bool link_ipv4ll_enabled(Link *link, AddressFamilyBoolean mask) {
b9d74c40 126 assert(link);
910feb78 127 assert((mask & ~(ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) == 0);
b9d74c40 128
78c958f8
TG		 129 if (link->flags & IFF_LOOPBACK)
130 return false;
131
132 if (!link->network)
133 return false;
134
d61e4c5b 135 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "ip6gre", "ip6tnl", "sit", "vti", "vti6", "can", "vcan", "vxcan", "nlmon"))
a8f5bba6
JD		 136 return false;
137
f410d463
YW		 138 /* L3 or L3S mode do not support ARP. */
139 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
140 return false;
141
f2bfcdb9
YW		 142 if (link->network->bond)
143 return false;
144
d61e4c5b
YW		 145 if (link->network->bond)
146 return false;
147
910feb78 148 return link->network->link_local & mask;
8bc17bb3
SS		 149}
150
b9d74c40
LP		 151static bool link_ipv6ll_enabled(Link *link) {
152 assert(link);
153
fa709992
LP		 154 if (!socket_ipv6_is_supported())
155 return false;
156
d0d6a4cd
TG		 157 if (link->flags & IFF_LOOPBACK)
158 return false;
159
160 if (!link->network)
161 return false;
162
d61e4c5b 163 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "can", "vcan", "vxcan", "nlmon"))
a8f5bba6
JD		 164 return false;
165
f2bfcdb9
YW		 166 if (link->network->bond)
167 return false;
168
4b600505
YW		 169 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
170 return false;
171
e0ee46f2 172 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 173}
174
439689c6
SS		 175static bool link_ipv6_enabled(Link *link) {
176 assert(link);
177
178 if (!socket_ipv6_is_supported())
179 return false;
180
b102cdca 181 if (link->network->bond)
2b00a4e0
TY		 182 return false;
183
4b600505
YW		 184 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
185 return false;
186
cab042b8 187 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
af9ba57a
YW		 188 return false;
189
4cef7fe3
TY		 190 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
191 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
439689c6
SS		 192}
193
7465dd22
PF		 194static bool link_radv_enabled(Link *link) {
195 assert(link);
196
197 if (!link_ipv6ll_enabled(link))
198 return false;
199
55a7c78b 200 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 201}
202
769d324c 203static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 204 assert(link);
205
5a8bcb67
LP		 206 if (link->flags & IFF_LOOPBACK)
207 return false;
208
209 if (!link->network)
210 return false;
211
765afd5c
LP		 212 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
213 return false;
214
e0ee46f2 215 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 216}
217
218static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 219 assert(link);
765afd5c
LP		 220
221 if (!socket_ipv6_is_supported())
222 return false;
223
769d324c
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
4b600505
YW		 233 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
234 return false;
235
e0ee46f2 236 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 237}
238
23d8b221
SS		 239static bool link_proxy_arp_enabled(Link *link) {
240 assert(link);
241
242 if (link->flags & IFF_LOOPBACK)
243 return false;
244
245 if (!link->network)
246 return false;
247
248 if (link->network->proxy_arp < 0)
249 return false;
250
251 return true;
252}
253
b9d74c40
LP		 254static bool link_ipv6_accept_ra_enabled(Link *link) {
255 assert(link);
256
fa709992
LP		 257 if (!socket_ipv6_is_supported())
258 return false;
259
f5a8c43f
TG		 260 if (link->flags & IFF_LOOPBACK)
261 return false;
262
263 if (!link->network)
264 return false;
265
702c979f
SS		 266 if (!link_ipv6ll_enabled(link))
267 return false;
268
f5a8c43f
TG		 269 /* If unset use system default (enabled if local forwarding is disabled.
270 * disabled if local forwarding is enabled).
271 * If set, ignore or enforce RA independent of local forwarding state.
272 */
273 if (link->network->ipv6_accept_ra < 0)
274 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
275 return !link_ipv6_forward_enabled(link);
276 else if (link->network->ipv6_accept_ra > 0)
277 /* accept RA even if ip_forward is enabled */
278 return true;
279 else
280 /* ignore RA */
281 return false;
282}
283
1f0d9695 284static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 285 assert(link);
d68e2e59
LP		 286
287 if (!socket_ipv6_is_supported())
288 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
289
49092e22 290 if (link->flags & IFF_LOOPBACK)
1f0d9695 291 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 292
293 if (!link->network)
1f0d9695 294 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 295
296 return link->network->ipv6_privacy_extensions;
297}
298
439689c6 299static int link_enable_ipv6(Link *link) {
439689c6
SS		 300 bool disabled;
301 int r;
302
303 if (link->flags & IFF_LOOPBACK)
304 return 0;
305
306 disabled = !link_ipv6_enabled(link);
307
62e021a9 308 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", disabled);
439689c6 309 if (r < 0)
c98b3545 310 log_link_warning_errno(link, r, "Cannot %s IPv6: %m", enable_disable(!disabled));
2d37cd53 311 else
b106c586 312 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
439689c6
SS		 313
314 return 0;
315}
316
34bf3c00
YW		 317static bool link_is_enslaved(Link *link) {
318 if (link->flags & IFF_SLAVE)
319 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
320 return true;
321
34bf3c00
YW		 322 if (!link->network)
323 return false;
324
bb262ef0 325 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 326 return true;
327
bb262ef0
YW		 328 /* TODO: add conditions for other netdevs. */
329
34bf3c00
YW		 330 return false;
331}
332
45e11abf
YW		 333static void link_update_master_operstate(Link *link, NetDev *netdev) {
334 Link *master;
335
336 if (!netdev)
337 return;
338
339 if (link_get(link->manager, netdev->ifindex, &master) < 0)
340 return;
341
342 link_update_operstate(master, true);
343}
344
345void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 346 LinkOperationalState operstate;
45e11abf 347 Iterator i;
14153d1b 348
84de38c5
TG		 349 assert(link);
350
351 if (link->kernel_operstate == IF_OPER_DORMANT)
352 operstate = LINK_OPERSTATE_DORMANT;
353 else if (link_has_carrier(link)) {
354 Address *address;
355 uint8_t scope = RT_SCOPE_NOWHERE;
84de38c5
TG		 356
357 /* if we have carrier, check what addresses we have */
358 SET_FOREACH(address, link->addresses, i) {
359 if (!address_is_ready(address))
360 continue;
361
362 if (address->scope < scope)
363 scope = address->scope;
364 }
365
366 /* for operstate we also take foreign addresses into account */
367 SET_FOREACH(address, link->addresses_foreign, i) {
368 if (!address_is_ready(address))
369 continue;
370
371 if (address->scope < scope)
372 scope = address->scope;
373 }
374
375 if (scope < RT_SCOPE_SITE)
376 /* universally accessible addresses found */
377 operstate = LINK_OPERSTATE_ROUTABLE;
378 else if (scope < RT_SCOPE_HOST)
379 /* only link or site local addresses found */
380 operstate = LINK_OPERSTATE_DEGRADED;
381 else
382 /* no useful addresses found */
383 operstate = LINK_OPERSTATE_CARRIER;
384 } else if (link->flags & IFF_UP)
385 operstate = LINK_OPERSTATE_NO_CARRIER;
386 else
387 operstate = LINK_OPERSTATE_OFF;
388
14153d1b 389 if (IN_SET(operstate, LINK_OPERSTATE_DEGRADED, LINK_OPERSTATE_CARRIER) &&
34bf3c00 390 link_is_enslaved(link))
14153d1b
YW		 391 operstate = LINK_OPERSTATE_ENSLAVED;
392
c9cc0383 393 if (operstate >= LINK_OPERSTATE_CARRIER) {
959f65d3
YW		 394 Link *slave;
395
5f707e12 396 SET_FOREACH(slave, link->slaves, i) {
959f65d3
YW		 397 link_update_operstate(slave, false);
398
c9cc0383
YW		 399 if (slave->operstate < LINK_OPERSTATE_CARRIER)
400 operstate = LINK_OPERSTATE_DEGRADED_CARRIER;
959f65d3
YW		 401 }
402 }
403
84de38c5
TG		 404 if (link->operstate != operstate) {
405 link->operstate = operstate;
406 link_send_changed(link, "OperationalState", NULL);
407 link_dirty(link);
84de38c5 408 }
959f65d3 409
45e11abf
YW		 410 if (also_update_master && link->network) {
411 link_update_master_operstate(link, link->network->bond);
412 link_update_master_operstate(link, link->network->bridge);
959f65d3 413 }
84de38c5
TG		 414}
415
51d18171
TG		 416#define FLAG_STRING(string, flag, old, new) \
417 (((old ^ new) & flag) \
418 ? ((old & flag) ? (" -" string) : (" +" string)) \
419 : "")
420
bb262ef0 421static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 422 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
423 uint8_t operstate;
424 int r;
425
426 assert(link);
427
428 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 429 if (r < 0)
430 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 431
1c4baffc 432 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 433 if (r < 0)
434 /* if we got a message without operstate, take it to mean
435 the state was unchanged */
436 operstate = link->kernel_operstate;
437
bb262ef0 438 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 439 return 0;
440
441 if (link->flags != flags) {
6a7a4e4d 442 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		 443 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
444 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
445 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
446 FLAG_STRING("UP", IFF_UP, link->flags, flags),
447 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
448 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
449 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
450 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
451 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
452 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
453 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
454 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
455 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
456 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
457 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
458 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
459 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
460 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
461 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
462
463 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
464 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
465 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
466 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
467 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
468 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
469 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
470 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
471
472 /* link flags are currently at most 18 bits, let's align to
473 * printing 20 */
474 if (unknown_flags_added)
79008bdd 475 log_link_debug(link,
6a7a4e4d 476 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 477 unknown_flags_added);
478
479 if (unknown_flags_removed)
79008bdd 480 log_link_debug(link,
6a7a4e4d 481 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 482 unknown_flags_removed);
483 }
484
485 link->flags = flags;
486 link->kernel_operstate = operstate;
487
959f65d3 488 link_update_operstate(link, true);
51d18171
TG		 489
490 return 0;
491}
492
1c4baffc 493static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 494 _cleanup_(link_unrefp) Link *link = NULL;
505f8da7 495 uint16_t type;
6cad256d 496 const char *ifname, *kind = NULL;
505f8da7 497 int r, ifindex;
b710e6b6 498 unsigned short iftype;
f579559b 499
0c2f9b84 500 assert(manager);
505f8da7 501 assert(message);
f579559b
TG		 502 assert(ret);
503
6cad256d
TJ		 504 /* check for link kind */
505 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
506 if (r == 0) {
db2f8a2e 507 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 508 r = sd_netlink_message_exit_container(message);
509 if (r < 0)
510 return r;
511 }
512
1c4baffc 513 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 514 if (r < 0)
515 return r;
516 else if (type != RTM_NEWLINK)
517 return -EINVAL;
518
519 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
520 if (r < 0)
521 return r;
522 else if (ifindex <= 0)
523 return -EINVAL;
524
b710e6b6
LP		 525 r = sd_rtnl_message_link_get_type(message, &iftype);
526 if (r < 0)
527 return r;
528
1c4baffc 529 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 530 if (r < 0)
531 return r;
532
17f9c355 533 link = new(Link, 1);
f579559b
TG		 534 if (!link)
535 return -ENOMEM;
536
17f9c355
YW		 537 *link = (Link) {
538 .n_ref = 1,
539 .manager = manager,
540 .state = LINK_STATE_PENDING,
541 .rtnl_extended_attrs = true,
542 .ifindex = ifindex,
543 .iftype = iftype,
544 };
545
505f8da7
TG		 546 link->ifname = strdup(ifname);
547 if (!link->ifname)
548 return -ENOMEM;
f579559b 549
6cad256d
TJ		 550 if (kind) {
551 link->kind = strdup(kind);
552 if (!link->kind)
553 return -ENOMEM;
554 }
555
cbff7170
TJ		 556 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
557 if (r < 0)
558 log_link_debug_errno(link, r, "New device has no master, continuing without");
559
1c4baffc 560 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 561 if (r < 0)
34437b4f 562 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 563
34437b4f 564 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 565 return -ENOMEM;
fe8db0c5 566
34437b4f 567 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 568 return -ENOMEM;
569
34437b4f 570 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 571 return -ENOMEM;
572
d5099efc 573 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 574 if (r < 0)
575 return r;
576
577 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 578 if (r < 0)
579 return r;
580
bb262ef0 581 r = link_update_flags(link, message, false);
51d18171
TG		 582 if (r < 0)
583 return r;
584
1cc6c93a 585 *ret = TAKE_PTR(link);
f579559b
TG		 586
587 return 0;
588}
589
8301aa0b 590static Link *link_free(Link *link) {
428fd0a7
TG		 591 Address *address;
592
8301aa0b 593 assert(link);
f579559b 594
f535e354
YW		 595 link->routes = set_free_with_destructor(link->routes, route_free);
596 link->routes_foreign = set_free_with_destructor(link->routes_foreign, route_free);
adda1ed9 597
f535e354
YW		 598 link->addresses = set_free_with_destructor(link->addresses, address_free);
599 link->addresses_foreign = set_free_with_destructor(link->addresses_foreign, address_free);
adda1ed9 600
11bf3cce
LP		 601 while ((address = link->pool_addresses)) {
602 LIST_REMOVE(addresses, link->pool_addresses, address);
603 address_free(address);
604 }
605
bfcdba8d 606 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 607 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 608 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 609
7272b25e 610 link_lldp_emit_stop(link);
8e1ad1ea 611
68a8723c
TG		 612 free(link->lease_file);
613
4afd3348 614 sd_lldp_unref(link->lldp);
49699bac
SS		 615 free(link->lldp_file);
616
c69305ff
LP		 617 ndisc_flush(link);
618
56cd007a 619 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 620 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 621 sd_ndisc_unref(link->ndisc);
7465dd22 622 sd_radv_unref(link->radv);
1e7a0e21 623
c166a070 624 free(link->ifname);
ceac4078 625 free(link->kind);
6cad256d 626
db2f8a2e 627 (void) unlink(link->state_file);
fe8db0c5 628 free(link->state_file);
c166a070 629
51517f9e 630 sd_device_unref(link->sd_device);
b5db00e5 631
0d4ad91d 632 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 633 hashmap_free(link->bound_by_links);
634
5f707e12 635 set_free_with_destructor(link->slaves, link_unref);
033295c1 636
c9c908a6
YW		 637 network_unref(link->network);
638
8301aa0b 639 return mfree(link);
14b746f7
TG		 640}
641
8301aa0b 642DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 643
11a7f229
TG		 644int link_get(Manager *m, int ifindex, Link **ret) {
645 Link *link;
11a7f229
TG		 646
647 assert(m);
11a7f229
TG		 648 assert(ifindex);
649 assert(ret);
650
ae06ab10 651 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 652 if (!link)
653 return -ENODEV;
654
655 *ret = link;
656
657 return 0;
658}
659
af9ba57a 660void link_set_state(Link *link, LinkState state) {
e331e246
TG		 661 assert(link);
662
663 if (link->state == state)
664 return;
665
0beb9542
YW		 666 log_link_debug(link, "State changed: %s -> %s",
667 link_state_to_string(link->state),
668 link_state_to_string(state));
669
e331e246
TG		 670 link->state = state;
671
672 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 673}
674
57bd6899
TG		 675static void link_enter_unmanaged(Link *link) {
676 assert(link);
677
e331e246 678 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 679
84de38c5 680 link_dirty(link);
57bd6899
TG		 681}
682
946f8e14 683int link_stop_clients(Link *link) {
111bb8f9
TG		 684 int r = 0, k;
685
686 assert(link);
687 assert(link->manager);
688 assert(link->manager->event);
689
ba179154 690 if (link->dhcp_client) {
111bb8f9 691 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 692 if (k < 0)
36c7d709 693 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 694 }
695
ba179154 696 if (link->ipv4ll) {
111bb8f9 697 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 698 if (k < 0)
36c7d709 699 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 700 }
701
f5a8c43f
TG		 702 if (link->dhcp6_client) {
703 k = sd_dhcp6_client_stop(link->dhcp6_client);
704 if (k < 0)
36c7d709 705 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 706 }
4138fb2c 707
1e7a0e21
LP		 708 if (link->ndisc) {
709 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 710 if (k < 0)
36c7d709 711 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 712 }
713
7465dd22
PF		 714 if (link->radv) {
715 k = sd_radv_stop(link->radv);
716 if (k < 0)
717 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
718 }
719
7272b25e 720 link_lldp_emit_stop(link);
111bb8f9
TG		 721 return r;
722}
723
b22d8a00 724void link_enter_failed(Link *link) {
ef1ba606 725 assert(link);
f882c247 726
370e9930 727 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 728 return;
729
6a7a4e4d 730 log_link_warning(link, "Failed");
449f7554 731
e331e246 732 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 733
111bb8f9
TG		 734 link_stop_clients(link);
735
84de38c5 736 link_dirty(link);
f882c247
TG		 737}
738
4f434938
LP		 739static Address* link_find_dhcp_server_address(Link *link) {
740 Address *address;
741
742 assert(link);
743 assert(link->network);
744
d4cdbea5 745 /* The first statically configured address if there is any */
4f434938
LP		 746 LIST_FOREACH(addresses, address, link->network->static_addresses) {
747
748 if (address->family != AF_INET)
749 continue;
750
af93291c 751 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 752 continue;
753
754 return address;
755 }
756
757 /* If that didn't work, find a suitable address we got from the pool */
758 LIST_FOREACH(addresses, address, link->pool_addresses) {
759 if (address->family != AF_INET)
760 continue;
761
762 return address;
763 }
764
765 return NULL;
766}
767
7033af49
YW		 768static int link_join_netdevs_after_configured(Link *link) {
769 NetDev *netdev;
770 Iterator i;
771 int r;
772
773 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
774 if (netdev->ifindex > 0)
775 /* Assume already enslaved. */
776 continue;
777
778 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
779 continue;
780
781 log_struct(LOG_DEBUG,
782 LOG_LINK_INTERFACE(link),
783 LOG_NETDEV_INTERFACE(netdev),
784 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
785
786 r = netdev_join(netdev, link, NULL);
787 if (r < 0)
788 return log_struct_errno(LOG_WARNING, r,
789 LOG_LINK_INTERFACE(link),
790 LOG_NETDEV_INTERFACE(netdev),
791 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
792 }
793
794 return 0;
795}
796
e3a7b048 797static void link_enter_configured(Link *link) {
dd43110f
TG		 798 assert(link);
799 assert(link->network);
e3a7b048 800
289e6774 801 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 802 return;
dd43110f 803
6a7a4e4d 804 log_link_info(link, "Configured");
dd43110f 805
e331e246 806 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 807
7033af49
YW		 808 (void) link_join_netdevs_after_configured(link);
809
84de38c5 810 link_dirty(link);
dd43110f
TG		 811}
812
47079967 813static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 814 RoutingPolicyRule *rule, *rrule = NULL;
815 int r;
816
817 assert(link);
818 assert(link->network);
819
2428613f
YW		 820 link_set_state(link, LINK_STATE_CONFIGURING);
821 link->routing_policy_rules_configured = false;
822
8a9b3a23
SS		 823 LIST_FOREACH(rules, rule, link->network->rules) {
824 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
926062f0
SS		 825 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif,
826 rule->protocol, &rule->sport, &rule->dport, &rrule);
e6b65ab7 827 if (r == 0) {
8a9b3a23
SS		 828 (void) routing_policy_rule_make_local(link->manager, rrule);
829 continue;
830 }
831
29889b4d 832 r = routing_policy_rule_configure(rule, link, NULL, false);
8a9b3a23
SS		 833 if (r < 0) {
834 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
835 link_enter_failed(link);
836 return r;
837 }
838
7715629e 839 link->routing_policy_rule_messages++;
8a9b3a23
SS		 840 }
841
842 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 843 if (link->routing_policy_rule_messages == 0) {
844 link->routing_policy_rules_configured = true;
845 link_check_ready(link);
846 } else
847 log_link_debug(link, "Setting routing policy rules");
8a9b3a23
SS		 848
849 return 0;
850}
851
302a796f 852static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 853 int r;
854
1046bf9b 855 assert(link);
7715629e 856 assert(link->route_messages > 0);
289e6774
WKI		 857 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
858 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 859
7715629e 860 link->route_messages--;
f882c247 861
77a008c0 862 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 863 return 1;
864
1c4baffc 865 r = sd_netlink_message_get_errno(m);
c166a070 866 if (r < 0 && r != -EEXIST)
a2fae7bb 867 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 868
7715629e 869 if (link->route_messages == 0) {
6a7a4e4d 870 log_link_debug(link, "Routes set");
7715629e 871 link->static_routes_configured = true;
8012cd39 872 link_check_ready(link);
dd3efc09 873 }
f882c247
TG		 874
875 return 1;
876}
877
b5799eeb 878int link_request_set_routes(Link *link) {
bf61b05a
LP		 879 enum {
880 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
881 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
882 _PHASE_MAX
883 } phase;
a6cc569e 884 Route *rt;
f882c247
TG		 885 int r;
886
887 assert(link);
888 assert(link->network);
c42ff3a1
WKI		 889 assert(link->addresses_configured);
890 assert(link->address_messages == 0);
289e6774 891 assert(link->state != _LINK_STATE_INVALID);
f882c247 892
289e6774 893 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 894 link->static_routes_configured = false;
27c34f73 895
47079967 896 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 897 if (r < 0)
898 return r;
f882c247 899
bf61b05a
LP		 900 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
901 for (phase = 0; phase < _PHASE_MAX; phase++)
902 LIST_FOREACH(routes, rt, link->network->static_routes) {
0d34228f 903
bf61b05a
LP		 904 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
905 continue;
a6cc569e 906
0d34228f
SS		 907 r = route_configure(rt, link, route_handler);
908 if (r < 0) {
909 log_link_warning_errno(link, r, "Could not set routes: %m");
910 link_enter_failed(link);
911 return r;
912 }
913
914 link->route_messages++;
915 }
f5be5601 916
7715629e
ST		 917 if (link->route_messages == 0) {
918 link->static_routes_configured = true;
8012cd39 919 link_check_ready(link);
431ca2ce 920 } else
6a7a4e4d 921 log_link_debug(link, "Setting routes");
f882c247
TG		 922
923 return 0;
924}
925
6accfd31
DA		 926void link_check_ready(Link *link) {
927 Address *a;
928 Iterator i;
929
930 assert(link);
931
932 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
933 return;
934
935 if (!link->network)
936 return;
937
938 if (!link->addresses_configured)
939 return;
940
941 if (!link->neighbors_configured)
942 return;
943
6aa5773b
DA		 944 SET_FOREACH(a, link->addresses, i)
945 if (!address_is_ready(a))
946 return;
947
948 if (!link->addresses_ready) {
949 link->addresses_ready = true;
950 link_request_set_routes(link);
710ce9e5 951 return;
6aa5773b
DA		 952 }
953
6accfd31
DA		 954 if (!link->static_routes_configured)
955 return;
956
957 if (!link->routing_policy_rules_configured)
958 return;
959
910feb78 960 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !(link->ipv4ll_address && link->ipv4ll_route))
6c0c041a 961 return;
6accfd31 962
b102cdca
YW		 963 if (link_ipv6ll_enabled(link) &&
964 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
965 return;
6accfd31 966
552081a4 967 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
6c0c041a 968 !(link->dhcp4_configured || link->dhcp6_configured) &&
910feb78 969 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address && link->ipv4ll_route))
6c0c041a
YW		 970 /* When DHCP is enabled, at least one protocol must provide an address, or
971 * an IPv4ll fallback address must be configured. */
b102cdca 972 return;
6accfd31 973
b102cdca
YW		 974 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
975 return;
6accfd31 976
6accfd31
DA		 977 if (link->state != LINK_STATE_CONFIGURED)
978 link_enter_configured(link);
979
980 return;
981}
982
e4a71bf3
WKI		 983static int link_request_set_neighbors(Link *link) {
984 Neighbor *neighbor;
985 int r;
986
987 assert(link);
988 assert(link->network);
989 assert(link->state != _LINK_STATE_INVALID);
990
991 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 992 link->neighbors_configured = false;
e4a71bf3
WKI		 993
994 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
995 r = neighbor_configure(neighbor, link, NULL);
996 if (r < 0) {
997 log_link_warning_errno(link, r, "Could not set neighbor: %m");
998 link_enter_failed(link);
999 return r;
1000 }
1001 }
1002
1003 if (link->neighbor_messages == 0) {
1004 link->neighbors_configured = true;
1005 link_check_ready(link);
1006 } else
1007 log_link_debug(link, "Setting neighbors");
1008
1009 return 0;
1010}
1011
302a796f 1012static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1013 int r;
1014
4958aee4 1015 assert(rtnl);
f5be5601
TG		 1016 assert(m);
1017 assert(link);
1018 assert(link->ifname);
7715629e 1019 assert(link->address_messages > 0);
289e6774 1020 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1021 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1022
7715629e 1023 link->address_messages--;
f882c247 1024
5da8149f 1025 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1026 return 1;
1027
1c4baffc 1028 r = sd_netlink_message_get_errno(m);
c166a070 1029 if (r < 0 && r != -EEXIST)
a2fae7bb 1030 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 1031 else if (r >= 0)
200a0868 1032 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1033
7715629e 1034 if (link->address_messages == 0) {
6a7a4e4d 1035 log_link_debug(link, "Addresses set");
c42ff3a1 1036 link->addresses_configured = true;
6aa5773b 1037 link_check_ready(link);
dd3efc09 1038 }
f882c247
TG		 1039
1040 return 1;
1041}
1042
a380b2d4 1043static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1044 _cleanup_free_ struct in_addr *addresses = NULL;
1045 size_t n_addresses = 0, n_allocated = 0;
5512a963 1046 unsigned i;
4f5f911e
LP		 1047
1048 log_debug("Copying DNS server information from %s", link->ifname);
1049
1050 if (!link->network)
1051 return 0;
1052
5512a963 1053 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 1054 struct in_addr ia;
4f5f911e
LP		 1055
1056 /* Only look for IPv4 addresses */
5512a963 1057 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 1058 continue;
1059
49ad6829
LP		 1060 ia = link->network->dns[i].address.in;
1061
1062 /* Never propagate obviously borked data */
1063 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1064 continue;
1065
4f5f911e
LP		 1066 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1067 return log_oom();
1068
49ad6829 1069 addresses[n_addresses++] = ia;
4f5f911e
LP		 1070 }
1071
5512a963 1072 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e 1073 const struct in_addr *da = NULL;
072320ea 1074 int j, n;
4f5f911e
LP		 1075
1076 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
1077 if (n > 0) {
1078
1079 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1080 return log_oom();
1081
072320ea
TH		 1082 for (j = 0; j < n; j++)
1083 if (in4_addr_is_non_local(&da[j]))
1084 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1085 }
1086 }
1087
1088 if (n_addresses <= 0)
1089 return 0;
1090
1091 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
1092}
1093
a380b2d4 1094static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1095 _cleanup_free_ struct in_addr *addresses = NULL;
1096 size_t n_addresses = 0, n_allocated = 0;
1097 char **a;
1098
1099 if (!link->network)
1100 return 0;
1101
1102 log_debug("Copying NTP server information from %s", link->ifname);
1103
1104 STRV_FOREACH(a, link->network->ntp) {
004aadca 1105 union in_addr_union ia;
4f5f911e
LP		 1106
1107 /* Only look for IPv4 addresses */
004aadca 1108 if (in_addr_from_string(AF_INET, *a, &ia) <= 0)
4f5f911e 1109 continue;
49ad6829
LP		 1110
1111 /* Never propagate obviously borked data */
004aadca 1112 if (in4_addr_is_null(&ia.in) || in4_addr_is_localhost(&ia.in))
49ad6829 1113 continue;
4f5f911e
LP		 1114
1115 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1116 return log_oom();
1117
004aadca 1118 addresses[n_addresses++] = ia.in;
4f5f911e
LP		 1119 }
1120
5512a963 1121 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e 1122 const struct in_addr *da = NULL;
072320ea 1123 int j, n;
4f5f911e
LP		 1124
1125 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1126 if (n > 0) {
1127
1128 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1129 return log_oom();
1130
072320ea
TH		 1131 for (j = 0; j < n; j++)
1132 if (in4_addr_is_non_local(&da[j]))
1133 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1134 }
1135 }
1136
1137 if (n_addresses <= 0)
1138 return 0;
1139
1140 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1141}
1142
f6bb7ac5
TJ		 1143static int link_set_bridge_fdb(Link *link) {
1144 FdbEntry *fdb_entry;
197e2809 1145 int r;
f6bb7ac5
TJ		 1146
1147 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1148 r = fdb_entry_configure(link, fdb_entry);
197e2809 1149 if (r < 0)
f6bb7ac5 1150 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1151 }
1152
197e2809 1153 return 0;
f6bb7ac5
TJ		 1154}
1155
289e6774 1156static int link_request_set_addresses(Link *link) {
95b74ef6 1157 AddressLabel *label;
a6cc569e 1158 Address *ad;
f882c247
TG		 1159 int r;
1160
1161 assert(link);
1162 assert(link->network);
f5be5601 1163 assert(link->state != _LINK_STATE_INVALID);
f882c247 1164
2428613f
YW		 1165 link_set_state(link, LINK_STATE_CONFIGURING);
1166
1167 /* Reset all *_configured flags we are configuring. */
1168 link->addresses_configured = false;
6aa5773b 1169 link->addresses_ready = false;
2428613f
YW		 1170 link->neighbors_configured = false;
1171 link->static_routes_configured = false;
1172 link->routing_policy_rules_configured = false;
1173
f6bb7ac5
TJ		 1174 r = link_set_bridge_fdb(link);
1175 if (r < 0)
1176 return r;
1177
f3ef324d
YW		 1178 r = link_request_set_neighbors(link);
1179 if (r < 0)
1180 return r;
e4a71bf3 1181
3d3d4255 1182 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1183 bool update;
1184
1185 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1186
1187 r = address_configure(ad, link, address_handler, update);
dd3efc09 1188 if (r < 0) {
5a8bcb67 1189 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1190 link_enter_failed(link);
95b74ef6
SS		 1191 return r;
1192 }
1193
7715629e 1194 link->address_messages++;
95b74ef6
SS		 1195 }
1196
1197 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1198 r = address_label_configure(label, link, NULL, false);
95b74ef6
SS		 1199 if (r < 0) {
1200 log_link_warning_errno(link, r, "Could not set address label: %m");
1201 link_enter_failed(link);
f5be5601
TG		 1202 return r;
1203 }
1204
7715629e 1205 link->address_label_messages++;
f882c247
TG		 1206 }
1207
d4cdbea5
TG		 1208 /* now that we can figure out a default address for the dhcp server,
1209 start it */
708c425d 1210 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
d4cdbea5 1211 Address *address;
4f5f911e
LP		 1212 Link *uplink = NULL;
1213 bool acquired_uplink = false;
d4cdbea5
TG		 1214
1215 address = link_find_dhcp_server_address(link);
1216 if (!address) {
6a7a4e4d 1217 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1218 link_enter_failed(link);
1219 return 0;
1220 }
1221
61986155 1222 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1223 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1224 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1225 if (r < 0)
1226 return r;
1227
1228 /* TODO:
1229 r = sd_dhcp_server_set_router(link->dhcp_server,
1230 &main_address->in_addr.in);
1231 if (r < 0)
1232 return r;
d4cdbea5
TG		 1233 */
1234
586ac6f7
LP		 1235 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1236 r = sd_dhcp_server_set_max_lease_time(
1237 link->dhcp_server,
1238 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1239 if (r < 0)
1240 return r;
1241 }
1242
1243 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1244 r = sd_dhcp_server_set_default_lease_time(
1245 link->dhcp_server,
1246 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1247 if (r < 0)
1248 return r;
1249 }
1250
1a04db0f
LP		 1251 if (link->network->dhcp_server_emit_dns) {
1252
4f5f911e 1253 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1254 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1255 else {
1256 uplink = manager_find_uplink(link->manager, link);
1257 acquired_uplink = true;
1258
1259 if (!uplink) {
1260 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1261 r = 0;
1262 } else
a380b2d4 1263 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1264 }
1265 if (r < 0)
1266 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1267 }
1268
1a04db0f
LP		 1269 if (link->network->dhcp_server_emit_ntp) {
1270
4f5f911e 1271 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1272 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1273 else {
1274 if (!acquired_uplink)
1275 uplink = manager_find_uplink(link->manager, link);
1276
1277 if (!uplink) {
1278 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1279 r = 0;
1280 } else
a380b2d4 1281 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1282
1283 }
1284 if (r < 0)
1285 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1286 }
1287
77ff6022 1288 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
fc95c359
YW		 1289 if (r < 0)
1290 return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
77ff6022 1291
8eb9058d
LP		 1292 if (link->network->dhcp_server_emit_timezone) {
1293 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1294 const char *tz = NULL;
8eb9058d
LP		 1295
1296 if (link->network->dhcp_server_timezone)
1297 tz = link->network->dhcp_server_timezone;
1298 else {
1299 r = get_timezone(&buffer);
1300 if (r < 0)
1301 log_warning_errno(r, "Failed to determine timezone: %m");
1302 else
1303 tz = buffer;
1304 }
1305
1306 if (tz) {
1307 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1308 if (r < 0)
1309 return r;
1310 }
1311 }
7da7340a
RJ		 1312 if (!sd_dhcp_server_is_running(link->dhcp_server)) {
1313 r = sd_dhcp_server_start(link->dhcp_server);
1314 if (r < 0) {
1315 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
8eb9058d 1316
7da7340a 1317 link_enter_failed(link);
d4cdbea5 1318
7da7340a
RJ		 1319 return 0;
1320 }
f3ef324d 1321 }
d4cdbea5 1322
6a7a4e4d 1323 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1324 }
1325
c42ff3a1
WKI		 1326 if (link->address_messages == 0) {
1327 link->addresses_configured = true;
6aa5773b 1328 link_check_ready(link);
c42ff3a1 1329 } else
6a7a4e4d 1330 log_link_debug(link, "Setting addresses");
431ca2ce 1331
f882c247
TG		 1332 return 0;
1333}
1334
13b498f9 1335static int link_set_bridge_vlan(Link *link) {
86e2be7b 1336 int r;
13b498f9
TJ		 1337
1338 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1339 if (r < 0)
1340 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1341
1342 return r;
1343}
1344
a60a720c 1345static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1346 int r;
1347
1348 if (!link_proxy_arp_enabled(link))
1349 return 0;
1350
62e021a9 1351 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1352 if (r < 0)
1353 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1354
1355 return 0;
1356}
1357
55dc8c4a
YW		 1358static int link_configure_after_setting_mtu(Link *link);
1359
302a796f 1360static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1361 int r;
1362
1363 assert(m);
1364 assert(link);
1365 assert(link->ifname);
1366
55dc8c4a
YW		 1367 link->setting_mtu = false;
1368
5da8149f 1369 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1370 return 1;
1371
1c4baffc 1372 r = sd_netlink_message_get_errno(m);
55dc8c4a 1373 if (r < 0) {
a2fae7bb 1374 log_link_warning_errno(link, r, "Could not set MTU: %m");
55dc8c4a
YW		 1375 return 1;
1376 }
1377
1378 log_link_debug(link, "Setting MTU done.");
1379
bd08ce56 1380 if (link->state == LINK_STATE_INITIALIZED)
55dc8c4a 1381 (void) link_configure_after_setting_mtu(link);
4f882b2a
TG		 1382
1383 return 1;
1384}
1385
933c70a0 1386int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1387 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1388 int r;
1389
1390 assert(link);
1391 assert(link->manager);
1392 assert(link->manager->rtnl);
1393
40288ece
YW		 1394 if (mtu == 0 || link->setting_mtu)
1395 return 0;
1396
933c70a0 1397 if (link->mtu == mtu)
ee493106
YW		 1398 return 0;
1399
6a7a4e4d 1400 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1401
6a7a4e4d
LP		 1402 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1403 if (r < 0)
1404 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1405
44b598a1 1406 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
b102cdca 1407 * for this interface, then disable IPv6 else enable it. */
44b598a1
SS		 1408 (void) link_enable_ipv6(link);
1409
1410 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1411 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1412 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1413
1414 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1415 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1416
72c2500b 1417 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1418 }
1419
1c4baffc 1420 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1421 if (r < 0)
1422 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1423
302a796f
YW		 1424 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1425 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1426 if (r < 0)
1427 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1428
ae941762 1429 link_ref(link);
1046bf9b 1430 link->setting_mtu = true;
b226d99b 1431
4f882b2a
TG		 1432 return 0;
1433}
1434
f6fcc1c2
YW		 1435static bool link_reduces_vlan_mtu(Link *link) {
1436 /* See netif_reduces_vlan_mtu() in kernel. */
1437 return streq_ptr(link->kind, "macsec");
1438}
1439
1440static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1441 uint32_t mtu = 0;
1442 NetDev *dev;
1443 Iterator i;
1444
1445 HASHMAP_FOREACH(dev, link->network->stacked_netdevs, i)
1446 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1447 /* See vlan_dev_change_mtu() in kernel. */
1448 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1449
1450 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1451 /* See macvlan_change_mtu() in kernel. */
1452 mtu = dev->mtu;
1453
1454 return mtu;
1455}
1456
1457static int link_configure_mtu(Link *link) {
1458 uint32_t mtu;
1459
1460 assert(link);
1461 assert(link->network);
1462
1463 if (link->network->mtu > 0)
1464 return link_set_mtu(link, link->network->mtu);
1465
1466 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1467 if (link->mtu >= mtu)
1468 return 0;
1469
1470 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1471 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1472 link->mtu, mtu);
1473
1474 return link_set_mtu(link, mtu);
1475}
1476
302a796f 1477static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1478 int r;
1479
1480 assert(m);
1481 assert(link);
1482 assert(link->ifname);
1483
1484 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1485 return 1;
1486
1487 r = sd_netlink_message_get_errno(m);
1488 if (r < 0)
1489 log_link_warning_errno(link, r, "Could not set link flags: %m");
1490
1491 return 1;
1492}
1493
1494static int link_set_flags(Link *link) {
1495 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1496 unsigned ifi_change = 0;
1497 unsigned ifi_flags = 0;
1498 int r;
1499
1500 assert(link);
1501 assert(link->manager);
1502 assert(link->manager->rtnl);
1503
1504 if (link->flags & IFF_LOOPBACK)
1505 return 0;
1506
1507 if (!link->network)
1508 return 0;
1509
866e6b7a 1510 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1511 return 0;
1512
1513 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1514 if (r < 0)
1515 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1516
1517 if (link->network->arp >= 0) {
1518 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1519 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1520 }
1521
1522 if (link->network->multicast >= 0) {
1523 ifi_change |= IFF_MULTICAST;
1524 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1525 }
1526
866e6b7a
SS		 1527 if (link->network->allmulticast >= 0) {
1528 ifi_change |= IFF_ALLMULTI;
1529 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1530 }
1531
99d2baa2
SS		 1532 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1533 if (r < 0)
1534 return log_link_error_errno(link, r, "Could not set link flags: %m");
1535
302a796f
YW		 1536 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1537 link_netlink_destroy_callback, link);
99d2baa2
SS		 1538 if (r < 0)
1539 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1540
1541 link_ref(link);
1542
1543 return 0;
1544}
1545
e7ab854c
TG		 1546static int link_acquire_ipv6_conf(Link *link) {
1547 int r;
1548
1549 assert(link);
1550
e7ab854c 1551 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1552 assert(link->ndisc);
e7ab854c
TG		 1553
1554 log_link_debug(link, "Discovering IPv6 routers");
1555
1e7a0e21 1556 r = sd_ndisc_start(link->ndisc);
63348d13 1557 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1558 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1559 }
1560
7465dd22
PF		 1561 if (link_radv_enabled(link)) {
1562 assert(link->radv);
1563 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1564
1565 log_link_debug(link, "Starting IPv6 Router Advertisements");
1566
1567 r = sd_radv_start(link->radv);
1568 if (r < 0 && r != -EBUSY)
1569 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1570 }
1571
10752343
PF		 1572 (void) dhcp6_request_prefix_delegation(link);
1573
e7ab854c
TG		 1574 return 0;
1575}
1576
6fc25497 1577static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1578 int r;
1579
1580 assert(link);
ff254138
TG		 1581 assert(link->manager);
1582 assert(link->manager->event);
1583
910feb78 1584 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1585 assert(link->ipv4ll);
ff254138 1586
6a7a4e4d 1587 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1588
1589 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1590 if (r < 0)
1591 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1592 }
1593
78c958f8 1594 if (link_dhcp4_enabled(link)) {
eb34d4af 1595 assert(link->dhcp_client);
ff254138 1596
6a7a4e4d 1597 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1598
5c1d3fc9 1599 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1600 if (r < 0)
1601 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1602 }
ff254138 1603
6fc25497
SS		 1604 return 0;
1605}
1606
1607static int link_acquire_conf(Link *link) {
1608 int r;
1609
1610 assert(link);
1611
1612 r = link_acquire_ipv4_conf(link);
1613 if (r < 0)
1614 return r;
1615
3f7cc080 1616 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1617 r = link_acquire_ipv6_conf(link);
1618 if (r < 0)
1619 return r;
1620 }
1621
7272b25e
LP		 1622 if (link_lldp_emit_enabled(link)) {
1623 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1624 if (r < 0)
1625 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1626 }
1627
ff254138
TG		 1628 return 0;
1629}
1630
a61bb41c 1631bool link_has_carrier(Link *link) {
deb2e523
TG		 1632 /* see Documentation/networking/operstates.txt in the kernel sources */
1633
a61bb41c 1634 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1635 return true;
1636
a61bb41c 1637 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1638 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1639 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1640 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1641 return true;
1642
1643 return false;
1644}
1645
0e2fdb83
SS		 1646static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1647 int r;
1648
1649 assert(link);
1650
1651 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1652 return 1;
1653
1654 r = sd_netlink_message_get_errno(m);
1655 if (r < 0)
1656 log_link_warning_errno(link, r, "Could not set address genmode for interface: %m");
1657
1658 return 1;
1659}
1660
1661static int link_configure_addrgen_mode(Link *link) {
1662 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1663 uint8_t ipv6ll_mode;
1664 int r;
1665
1666 assert(link);
1667 assert(link->network);
1668 assert(link->manager);
1669 assert(link->manager->rtnl);
1670
9f6e82e6
YW		 1671 if (!socket_ipv6_is_supported())
1672 return 0;
1673
0e2fdb83
SS		 1674 log_link_debug(link, "Setting address genmode for link");
1675
1676 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1677 if (r < 0)
1678 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1679
1680 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1681 if (r < 0)
1682 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1683
1684 r = sd_netlink_message_open_container(req, AF_INET6);
1685 if (r < 0)
1686 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1687
1688 if (!link_ipv6ll_enabled(link))
1689 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
826a3602 1690 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
0e2fdb83 1691 /* The file may not exist. And event if it exists, when stable_secret is unset,
826a3602
YW		 1692 * reading the file fails with EIO. */
1693 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1694 else
1695 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
0e2fdb83
SS		 1696
1697 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1698 if (r < 0)
1699 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1700
1701 r = sd_netlink_message_close_container(req);
1702 if (r < 0)
1703 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1704
1705 r = sd_netlink_message_close_container(req);
1706 if (r < 0)
1707 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1708
1709 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1710 link_netlink_destroy_callback, link);
1711 if (r < 0)
1712 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1713
1714 link_ref(link);
1715
1716 return 0;
1717}
1718
302a796f 1719static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1720 int r;
1721
1746cf2a
TG		 1722 assert(link);
1723
5da8149f 1724 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1725 return 1;
1726
1c4baffc 1727 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1728 if (r < 0)
26d6b214 1729 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 1730 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1731
f882c247
TG		 1732 return 1;
1733}
1734
1cc84f3b 1735static int link_up(Link *link) {
4afd3348 1736 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1737 int r;
1738
f882c247 1739 assert(link);
c106cc36 1740 assert(link->network);
f882c247
TG		 1741 assert(link->manager);
1742 assert(link->manager->rtnl);
1743
6a7a4e4d 1744 log_link_debug(link, "Bringing link up");
449f7554 1745
6a7a4e4d
LP		 1746 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1747 if (r < 0)
1748 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1749
2b2d8603 1750 /* set it free if not enslaved with networkd */
6cb955c6 1751 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1752 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1753 if (r < 0)
1754 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1755 }
1756
5d4795f3 1757 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1758 if (r < 0)
1759 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1760
c106cc36 1761 if (link->network->mac) {
1c4baffc 1762 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1763 if (r < 0)
1764 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1765 }
1766
302a796f
YW		 1767 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1768 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1769 if (r < 0)
1770 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1771
b226d99b
TG		 1772 link_ref(link);
1773
f882c247
TG		 1774 return 0;
1775}
1776
302a796f 1777static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1778 int r;
1779
1780 assert(link);
1781
1782 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1783 return 1;
1784
1c4baffc 1785 r = sd_netlink_message_get_errno(m);
0d4ad91d 1786 if (r < 0)
a2fae7bb 1787 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d
AR		 1788
1789 return 1;
1790}
1791
8e54db83 1792int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1793 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1794 int r;
1795
1796 assert(link);
1797 assert(link->manager);
1798 assert(link->manager->rtnl);
1799
6a7a4e4d 1800 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1801
1802 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1803 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1804 if (r < 0)
1805 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1806
1807 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1808 if (r < 0)
1809 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1810
8e54db83
YW		 1811 r = netlink_call_async(link->manager->rtnl, NULL, req,
1812 callback ?: link_down_handler,
302a796f 1813 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1814 if (r < 0)
1815 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1816
1817 link_ref(link);
1818
1819 return 0;
1820}
1821
1822static int link_handle_bound_to_list(Link *link) {
1823 Link *l;
1824 Iterator i;
1825 int r;
1826 bool required_up = false;
1827 bool link_is_up = false;
1828
1829 assert(link);
1830
1831 if (hashmap_isempty(link->bound_to_links))
1832 return 0;
1833
1834 if (link->flags & IFF_UP)
1835 link_is_up = true;
1836
1837 HASHMAP_FOREACH (l, link->bound_to_links, i)
1838 if (link_has_carrier(l)) {
1839 required_up = true;
1840 break;
1841 }
1842
1843 if (!required_up && link_is_up) {
8e54db83 1844 r = link_down(link, NULL);
0d4ad91d
AR		 1845 if (r < 0)
1846 return r;
1847 } else if (required_up && !link_is_up) {
1848 r = link_up(link);
1849 if (r < 0)
1850 return r;
1851 }
1852
1853 return 0;
1854}
1855
1856static int link_handle_bound_by_list(Link *link) {
1857 Iterator i;
1858 Link *l;
1859 int r;
1860
1861 assert(link);
1862
1863 if (hashmap_isempty(link->bound_by_links))
1864 return 0;
1865
1866 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1867 r = link_handle_bound_to_list(l);
1868 if (r < 0)
1869 return r;
1870 }
1871
1872 return 0;
1873}
1874
1875static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1876 int r;
1877
1878 assert(link);
1879 assert(carrier);
1880
1881 if (link == carrier)
1882 return 0;
1883
1884 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1885 return 0;
1886
1887 r = hashmap_ensure_allocated(h, NULL);
1888 if (r < 0)
1889 return r;
1890
1891 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1892 if (r < 0)
1893 return r;
1894
1895 return 0;
1896}
1897
1898static int link_new_bound_by_list(Link *link) {
1899 Manager *m;
1900 Link *carrier;
1901 Iterator i;
1902 int r;
1903 bool list_updated = false;
1904
1905 assert(link);
1906 assert(link->manager);
1907
1908 m = link->manager;
1909
b295beea 1910 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 1911 if (!carrier->network)
1912 continue;
1913
1914 if (strv_isempty(carrier->network->bind_carrier))
1915 continue;
1916
1917 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
1918 r = link_put_carrier(link, carrier, &link->bound_by_links);
1919 if (r < 0)
1920 return r;
1921
1922 list_updated = true;
1923 }
1924 }
1925
1926 if (list_updated)
84de38c5 1927 link_dirty(link);
0d4ad91d 1928
b295beea 1929 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 1930 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1931 if (r < 0)
1932 return r;
1933
84de38c5 1934 link_dirty(carrier);
0d4ad91d
AR		 1935 }
1936
1937 return 0;
1938}
1939
1940static int link_new_bound_to_list(Link *link) {
1941 Manager *m;
1942 Link *carrier;
1943 Iterator i;
1944 int r;
1945 bool list_updated = false;
1946
1947 assert(link);
1948 assert(link->manager);
1949
1950 if (!link->network)
1951 return 0;
1952
1953 if (strv_isempty(link->network->bind_carrier))
1954 return 0;
1955
1956 m = link->manager;
1957
1958 HASHMAP_FOREACH (carrier, m->links, i) {
1959 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
1960 r = link_put_carrier(link, carrier, &link->bound_to_links);
1961 if (r < 0)
1962 return r;
1963
1964 list_updated = true;
1965 }
1966 }
1967
1968 if (list_updated)
84de38c5 1969 link_dirty(link);
0d4ad91d
AR		 1970
1971 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
1972 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1973 if (r < 0)
1974 return r;
1975
84de38c5 1976 link_dirty(carrier);
0d4ad91d
AR		 1977 }
1978
1979 return 0;
1980}
1981
1982static int link_new_carrier_maps(Link *link) {
1983 int r;
1984
1985 r = link_new_bound_by_list(link);
1986 if (r < 0)
1987 return r;
1988
1989 r = link_handle_bound_by_list(link);
1990 if (r < 0)
1991 return r;
1992
1993 r = link_new_bound_to_list(link);
1994 if (r < 0)
1995 return r;
1996
1997 r = link_handle_bound_to_list(link);
1998 if (r < 0)
1999 return r;
2000
2001 return 0;
2002}
2003
2004static void link_free_bound_to_list(Link *link) {
2005 Link *bound_to;
2006 Iterator i;
2007
2008 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2009 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2010
2011 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2012 link_dirty(bound_to);
0d4ad91d
AR		 2013 }
2014
2015 return;
2016}
2017
2018static void link_free_bound_by_list(Link *link) {
2019 Link *bound_by;
2020 Iterator i;
2021
2022 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2023 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2024
2025 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2026 link_dirty(bound_by);
0d4ad91d
AR		 2027 link_handle_bound_to_list(bound_by);
2028 }
2029 }
2030
2031 return;
2032}
2033
2034static void link_free_carrier_maps(Link *link) {
2035 bool list_updated = false;
2036
2037 assert(link);
2038
2039 if (!hashmap_isempty(link->bound_to_links)) {
2040 link_free_bound_to_list(link);
2041 list_updated = true;
2042 }
2043
2044 if (!hashmap_isempty(link->bound_by_links)) {
2045 link_free_bound_by_list(link);
2046 list_updated = true;
2047 }
2048
2049 if (list_updated)
84de38c5 2050 link_dirty(link);
0d4ad91d
AR		 2051
2052 return;
2053}
2054
5f707e12
YW		 2055static int link_append_to_master(Link *link, NetDev *netdev) {
2056 Link *master;
2057 int r;
2058
2059 assert(link);
2060 assert(netdev);
2061
2062 r = link_get(link->manager, netdev->ifindex, &master);
2063 if (r < 0)
2064 return r;
2065
2066 r = set_ensure_allocated(&master->slaves, NULL);
2067 if (r < 0)
2068 return r;
2069
2070 r = set_put(master->slaves, link);
2071 if (r < 0)
2072 return r;
2073
2074 link_ref(link);
2075 return 0;
2076}
2077
2078static void link_drop_from_master(Link *link, NetDev *netdev) {
2079 Link *master;
2080
2081 assert(link);
2082
2083 if (!link->manager || !netdev)
2084 return;
2085
2086 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2087 return;
2088
2089 link_unref(set_remove(master->slaves, link));
2090}
2091
2092static void link_detach_from_manager(Link *link) {
2093 if (!link || !link->manager)
2094 return;
2095
2096 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2097 link_clean(link);
2098
2099 /* The following must be called at last. */
2100 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2101 link_unref(link);
2102}
2103
0d4ad91d
AR		 2104void link_drop(Link *link) {
2105 if (!link || link->state == LINK_STATE_LINGER)
2106 return;
2107
2108 link_set_state(link, LINK_STATE_LINGER);
2109
2110 link_free_carrier_maps(link);
2111
5f707e12
YW		 2112 if (link->network) {
2113 link_drop_from_master(link, link->network->bridge);
2114 link_drop_from_master(link, link->network->bond);
2115 }
2116
6a7a4e4d 2117 log_link_debug(link, "Link removed");
0d4ad91d 2118
db2f8a2e 2119 (void) unlink(link->state_file);
c4397d94 2120 link_detach_from_manager(link);
0d4ad91d
AR		 2121}
2122
3f265037 2123static int link_joined(Link *link) {
f882c247
TG		 2124 int r;
2125
ef1ba606 2126 assert(link);
f5be5601 2127 assert(link->network);
dd3efc09 2128
0d4ad91d
AR		 2129 if (!hashmap_isempty(link->bound_to_links)) {
2130 r = link_handle_bound_to_list(link);
2131 if (r < 0)
2132 return r;
2133 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2134 r = link_up(link);
2135 if (r < 0) {
2136 link_enter_failed(link);
2137 return r;
2138 }
ef1ba606 2139 }
f882c247 2140
9ed794a3 2141 if (link->network->bridge) {
e1853b00 2142 r = link_set_bridge(link);
6a7a4e4d
LP		 2143 if (r < 0)
2144 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 2145
2146 r = link_append_to_master(link, link->network->bridge);
2147 if (r < 0)
2148 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 2149 }
2150
eb64b435 2151 if (link->network->bond) {
7fcee284 2152 r = link_set_bond(link);
eb64b435
SS		 2153 if (r < 0)
2154 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2155
45e11abf 2156 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2157 if (r < 0)
2158 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2159 }
2160
ffff9abe
TJ		 2161 if (link->network->use_br_vlan &&
2162 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2163 r = link_set_bridge_vlan(link);
2164 if (r < 0)
2165 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2166 }
2167
c1835a42
RM		 2168 /* Skip setting up addresses until it gets carrier,
2169 or it would try to set addresses twice,
2170 which is bad for non-idempotent steps. */
dad2d78e 2171 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2172 return 0;
2173
289e6774 2174 return link_request_set_addresses(link);
02b59d57
TG		 2175}
2176
302a796f 2177static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2178 int r;
2179
1746cf2a 2180 assert(link);
ef1ba606 2181 assert(link->network);
34bf3c00 2182 assert(link->enslaving > 0);
02b59d57 2183
313cefa1 2184 link->enslaving--;
52433f6b 2185
5da8149f 2186 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2187 return 1;
2188
1c4baffc 2189 r = sd_netlink_message_get_errno(m);
856f962c 2190 if (r < 0 && r != -EEXIST) {
a2fae7bb 2191 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2192 link_enter_failed(link);
2193 return 1;
ba179154 2194 } else
6a7a4e4d 2195 log_link_debug(link, "Joined netdev");
02b59d57 2196
34bf3c00 2197 if (link->enslaving == 0) {
3f265037 2198 link_joined(link);
34bf3c00 2199 }
02b59d57
TG		 2200
2201 return 1;
2202}
2203
3f265037 2204static int link_enter_join_netdev(Link *link) {
6a0a2f86 2205 NetDev *netdev;
672682a6 2206 Iterator i;
02b59d57
TG		 2207 int r;
2208
2209 assert(link);
2210 assert(link->network);
bd08ce56 2211 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2212
289e6774 2213 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2214
84de38c5 2215 link_dirty(link);
34bf3c00 2216 link->enslaving = 0;
02b59d57 2217
d9c67ea1 2218 if (link->network->bond) {
cbff7170
TJ		 2219 if (link->network->bond->state == NETDEV_STATE_READY &&
2220 link->network->bond->ifindex == link->master_ifindex)
2221 return link_joined(link);
2222
f2341e0a
LP		 2223 log_struct(LOG_DEBUG,
2224 LOG_LINK_INTERFACE(link),
2225 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2226 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2227
34bf3c00
YW		 2228 link->enslaving++;
2229
f2341e0a 2230 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2231 if (r < 0) {
f2341e0a
LP		 2232 log_struct_errno(LOG_WARNING, r,
2233 LOG_LINK_INTERFACE(link),
2234 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2235 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2236 link_enter_failed(link);
2237 return r;
2238 }
0ad6148e
MO		 2239 }
2240
d9c67ea1 2241 if (link->network->bridge) {
f2341e0a
LP		 2242 log_struct(LOG_DEBUG,
2243 LOG_LINK_INTERFACE(link),
2244 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2245 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2246
34bf3c00
YW		 2247 link->enslaving++;
2248
f2341e0a 2249 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2250 if (r < 0) {
f2341e0a
LP		 2251 log_struct_errno(LOG_WARNING, r,
2252 LOG_LINK_INTERFACE(link),
2253 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2254 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2255 link_enter_failed(link);
2256 return r;
2257 }
52433f6b
TG		 2258 }
2259
6cb955c6
AR		 2260 if (link->network->vrf) {
2261 log_struct(LOG_DEBUG,
2262 LOG_LINK_INTERFACE(link),
2263 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2264 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2265
34bf3c00
YW		 2266 link->enslaving++;
2267
6cb955c6
AR		 2268 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2269 if (r < 0) {
2270 log_struct_errno(LOG_WARNING, r,
2271 LOG_LINK_INTERFACE(link),
2272 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2273 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2274 link_enter_failed(link);
2275 return r;
2276 }
6cb955c6
AR		 2277 }
2278
6a0a2f86 2279 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2280
2b6db913
YW		 2281 if (netdev->ifindex > 0)
2282 /* Assume already enslaved. */
a63e5daa 2283 continue;
a63e5daa 2284
7033af49
YW		 2285 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2286 continue;
2287
f2341e0a
LP		 2288 log_struct(LOG_DEBUG,
2289 LOG_LINK_INTERFACE(link),
2290 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2291 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2292
34bf3c00
YW		 2293 link->enslaving++;
2294
f2341e0a 2295 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2296 if (r < 0) {
f2341e0a
LP		 2297 log_struct_errno(LOG_WARNING, r,
2298 LOG_LINK_INTERFACE(link),
2299 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2300 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2301 link_enter_failed(link);
2302 return r;
2303 }
326cb406
SS		 2304 }
2305
34bf3c00
YW		 2306 if (link->enslaving == 0)
2307 return link_joined(link);
2308
ef1ba606
TG		 2309 return 0;
2310}
2311
769d324c 2312static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2313 int r;
2314
765afd5c 2315 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2316 return 0;
2317
765afd5c
LP		 2318 /* We propagate the forwarding flag from one interface to the
2319 * global setting one way. This means: as long as at least one
2320 * interface was configured at any time that had IP forwarding
2321 * enabled the setting will stay on for good. We do this
2322 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2323 * somewhat in sync (see below). */
15dee3f0 2324
62e021a9 2325 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2326 if (r < 0)
765afd5c 2327 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2328
769d324c
LP		 2329 return 0;
2330}
2331
2332static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2333 int r;
2334
765afd5c 2335 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2336 return 0;
2337
61233823 2338 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2339 * packet forwarding setting: either packet forwarding is on
2340 * for all, or off for all. We hence don't bother with a
2341 * per-interface setting, but simply propagate the interface
2342 * flag, if it is set, to the global flag, one-way. Note that
2343 * while IPv4 would allow a per-interface flag, we expose the
2344 * same behaviour there and also propagate the setting from
2345 * one to all, to keep things simple (see above). */
15dee3f0 2346
62e021a9 2347 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2348 if (r < 0)
765afd5c 2349 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2350
2351 return 0;
2352}
2353
49092e22 2354static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2355 IPv6PrivacyExtensions s;
49092e22
SS		 2356 int r;
2357
1f0d9695 2358 s = link_ipv6_privacy_extensions(link);
66a6bd68 2359 if (s < 0)
49092e22
SS		 2360 return 0;
2361
62e021a9 2362 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2363 if (r < 0)
49092e22
SS		 2364 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2365
2366 return 0;
2367}
2368
4f2e437a 2369static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2370 int r;
2371
2372 /* Make this a NOP if IPv6 is not available */
2373 if (!socket_ipv6_is_supported())
2374 return 0;
2375
2376 if (link->flags & IFF_LOOPBACK)
2377 return 0;
2378
d68e2e59
LP		 2379 if (!link->network)
2380 return 0;
2381
62e021a9 2382 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2383 if (r < 0)
fe307276 2384 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2385
2386 return 0;
2387}
2388
8749cbcd 2389static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2390 int r;
2391
2392 /* Make this a NOP if IPv6 is not available */
2393 if (!socket_ipv6_is_supported())
2394 return 0;
2395
2396 if (link->flags & IFF_LOOPBACK)
2397 return 0;
2398
d68e2e59
LP		 2399 if (!link->network)
2400 return 0;
2401
8749cbcd
SS		 2402 if (link->network->ipv6_dad_transmits < 0)
2403 return 0;
2404
62e021a9 2405 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2406 if (r < 0)
8749cbcd 2407 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2408
2409 return 0;
2410}
2411
b69c3180 2412static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2413 int r;
2414
2415 /* Make this a NOP if IPv6 is not available */
2416 if (!socket_ipv6_is_supported())
2417 return 0;
2418
2419 if (link->flags & IFF_LOOPBACK)
2420 return 0;
2421
d68e2e59
LP		 2422 if (!link->network)
2423 return 0;
2424
b69c3180
SS		 2425 if (link->network->ipv6_hop_limit < 0)
2426 return 0;
2427
62e021a9 2428 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2429 if (r < 0)
b69c3180 2430 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2431
2432 return 0;
2433}
2434
11102cba 2435static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2436 int r;
2437
2438 /* Make this a NOP if IPv6 is not available */
2439 if (!socket_ipv6_is_supported())
2440 return 0;
2441
2442 if (link->flags & IFF_LOOPBACK)
2443 return 0;
2444
2445 if (link->network->ipv6_mtu == 0)
2446 return 0;
2447
62e021a9 2448 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
11102cba
SS		 2449 if (r < 0)
2450 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2451
2452 return 0;
2453}
2454
30226d27
TJ		 2455static bool link_is_static_address_configured(Link *link, Address *address) {
2456 Address *net_address;
2457
2458 assert(link);
2459 assert(address);
2460
2461 if (!link->network)
2462 return false;
2463
2464 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2465 if (address_equal(net_address, address))
2466 return true;
2467
2468 return false;
2469}
2470
7ecf0c3e
TJ		 2471static bool link_is_static_route_configured(Link *link, Route *route) {
2472 Route *net_route;
2473
2474 assert(link);
2475 assert(route);
2476
2477 if (!link->network)
2478 return false;
2479
2480 LIST_FOREACH(routes, net_route, link->network->static_routes)
2481 if (route_equal(net_route, route))
2482 return true;
2483
2484 return false;
2485}
2486
5e5b137a
TG		 2487static int link_drop_foreign_config(Link *link) {
2488 Address *address;
2489 Route *route;
2490 Iterator i;
2491 int r;
2492
2493 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2494 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2495 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2496 continue;
2497
30226d27
TJ		 2498 if (link_is_static_address_configured(link, address)) {
2499 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2500 if (r < 0)
2501 return log_link_error_errno(link, r, "Failed to add address: %m");
2502 } else {
63ae0569 2503 r = address_remove(address, link, NULL);
30226d27
TJ		 2504 if (r < 0)
2505 return r;
2506 }
5e5b137a
TG		 2507 }
2508
2509 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2510 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2511 if (route->protocol == RTPROT_KERNEL)
2512 continue;
2513
7ecf0c3e
TJ		 2514 if (link_is_static_route_configured(link, route)) {
2515 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2516 if (r < 0)
2517 return r;
2518 } else {
4645ad47 2519 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2520 if (r < 0)
2521 return r;
2522 }
5e5b137a
TG		 2523 }
2524
2525 return 0;
2526}
2527
3104883d 2528static int link_drop_config(Link *link) {
410a7f15 2529 Address *address, *pool_address;
3104883d
SS		 2530 Route *route;
2531 Iterator i;
2532 int r;
2533
2534 SET_FOREACH(address, link->addresses, i) {
2535 /* we consider IPv6LL addresses to be managed by the kernel */
2536 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2537 continue;
2538
63ae0569 2539 r = address_remove(address, link, NULL);
3104883d
SS		 2540 if (r < 0)
2541 return r;
410a7f15
RM		 2542
2543 /* If this address came from an address pool, clean up the pool */
2544 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2545 if (address_equal(address, pool_address)) {
2546 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2547 address_free(pool_address);
2548 break;
2549 }
2550 }
3104883d
SS		 2551 }
2552
2553 SET_FOREACH(route, link->routes, i) {
2554 /* do not touch routes managed by the kernel */
2555 if (route->protocol == RTPROT_KERNEL)
2556 continue;
2557
4645ad47 2558 r = route_remove(route, link, NULL);
3104883d
SS		 2559 if (r < 0)
2560 return r;
2561 }
2562
c69305ff
LP		 2563 ndisc_flush(link);
2564
3104883d
SS		 2565 return 0;
2566}
2567
a748b692 2568static int link_configure(Link *link) {
02b59d57
TG		 2569 int r;
2570
ef1ba606 2571 assert(link);
b22d8a00 2572 assert(link->network);
bd08ce56 2573 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2574
cab042b8 2575 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
93ea7750 2576 return link_configure_can(link);
92c918b0 2577
02e28621
ДГ		 2578 /* Drop foreign config, but ignore loopback or critical devices.
2579 * We do not want to remove loopback address or addresses used for root NFS. */
2580 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 2581 r = link_drop_foreign_config(link);
2582 if (r < 0)
2583 return r;
2584 }
5e5b137a 2585
23d8b221
SS		 2586 r = link_set_proxy_arp(link);
2587 if (r < 0)
2588 return r;
2589
a0e5c15d
FK		 2590 r = ipv6_proxy_ndp_addresses_configure(link);
2591 if (r < 0)
2592 return r;
2593
769d324c
LP		 2594 r = link_set_ipv4_forward(link);
2595 if (r < 0)
2596 return r;
2597
2598 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2599 if (r < 0)
2600 return r;
2601
49092e22
SS		 2602 r = link_set_ipv6_privacy_extensions(link);
2603 if (r < 0)
2604 return r;
2605
4f2e437a
SS		 2606 r = link_set_ipv6_accept_ra(link);
2607 if (r < 0)
2608 return r;
2609
8749cbcd
SS		 2610 r = link_set_ipv6_dad_transmits(link);
2611 if (r < 0)
2612 return r;
b69c3180
SS		 2613
2614 r = link_set_ipv6_hop_limit(link);
2615 if (r < 0)
2616 return r;
8749cbcd 2617
99d2baa2
SS		 2618 r = link_set_flags(link);
2619 if (r < 0)
2620 return r;
2621
11102cba
SS		 2622 r = link_set_ipv6_mtu(link);
2623 if (r < 0)
2624 return r;
2625
910feb78 2626 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
b22d8a00 2627 r = ipv4ll_configure(link);
eb34d4af
TG		 2628 if (r < 0)
2629 return r;
2630 }
2631
78c958f8 2632 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2633 r = dhcp4_set_promote_secondaries(link);
2634 if (r < 0)
2635 return r;
2636
3c9b8860 2637 r = dhcp4_configure(link);
eb34d4af
TG		 2638 if (r < 0)
2639 return r;
eb34d4af
TG		 2640 }
2641
78c958f8 2642 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2643 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2644 if (r < 0)
2645 return r;
2646
2647 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2648 if (r < 0)
2649 return r;
dd43110f
TG		 2650 }
2651
62379e88
TG		 2652 if (link_dhcp6_enabled(link) ||
2653 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2654 r = dhcp6_configure(link);
2655 if (r < 0)
2656 return r;
2657 }
2658
2659 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2660 r = ndisc_configure(link);
4138fb2c
PF		 2661 if (r < 0)
2662 return r;
2663 }
2664
7465dd22
PF		 2665 if (link_radv_enabled(link)) {
2666 r = radv_configure(link);
2667 if (r < 0)
2668 return r;
2669 }
2670
8e1ad1ea 2671 if (link_lldp_rx_enabled(link)) {
7f853950 2672 r = link_lldp_rx_configure(link);
273eec24
LP		 2673 if (r < 0)
2674 return r;
ce43e484
SS		 2675 }
2676
f6fcc1c2 2677 r = link_configure_mtu(link);
40288ece
YW		 2678 if (r < 0)
2679 return r;
44b598a1 2680
9f6e82e6
YW		 2681 r = link_configure_addrgen_mode(link);
2682 if (r < 0)
2683 return r;
0e2fdb83 2684
55dc8c4a
YW		 2685 return link_configure_after_setting_mtu(link);
2686}
2687
2688static int link_configure_after_setting_mtu(Link *link) {
2689 int r;
2690
2691 assert(link);
2692 assert(link->network);
bd08ce56 2693 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a
YW		 2694
2695 if (link->setting_mtu)
2696 return 0;
2697
dad2d78e 2698 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2699 r = link_acquire_conf(link);
2700 if (r < 0)
2701 return r;
cc544d5f 2702 }
1e9be60b 2703
3f265037 2704 return link_enter_join_netdev(link);
505f8da7
TG		 2705}
2706
27dfc982
YW		 2707static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2708 assert(duid);
2709
2710 if (duid->raw_data_len > 0)
2711 return 0;
2712
2713 if (duid->type != DUID_TYPE_UUID)
2714 return -EINVAL;
2715
2716 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2717 duid->raw_data_len = sizeof(sd_id128_t);
2718
2719 return 1;
2720}
2721
2722int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2723 Manager *manager = userdata;
2724 const sd_bus_error *e;
2725 const void *a;
2726 size_t sz;
2727 DUID *duid;
2728 Link *link;
2729 int r;
2730
2731 assert(m);
2732 assert(manager);
2733
2734 e = sd_bus_message_get_error(m);
2735 if (e) {
2736 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 2737 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 2738 e->message);
2739 goto configure;
2740 }
2741
2742 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2743 if (r < 0)
2744 goto configure;
2745
2746 if (sz != sizeof(sd_id128_t)) {
ab4dd984 2747 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 2748 goto configure;
2749 }
2750
2751 memcpy(&manager->product_uuid, a, sz);
2752 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2753 (void) duid_set_uuid(duid, manager->product_uuid);
2754
2755 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2756
2757configure:
2758 while ((link = set_steal_first(manager->links_requesting_uuid))) {
2759 r = link_configure(link);
2760 if (r < 0)
2761 log_link_error_errno(link, r, "Failed to configure link: %m");
2762 }
2763
2764 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
2765
2766 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2767 * even if the method fails. */
2768 manager->has_product_uuid = true;
2769
2770 return 1;
2771}
2772
2773static bool link_requires_uuid(Link *link) {
2774 const DUID *duid;
2775
2776 assert(link);
2777 assert(link->manager);
2778 assert(link->network);
2779
2780 duid = link_get_duid(link);
2781 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
2782 return false;
2783
2784 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
2785 return true;
2786
2787 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
2788 return true;
2789
2790 return false;
2791}
2792
2793static int link_configure_duid(Link *link) {
2794 Manager *m;
2795 DUID *duid;
2796 int r;
2797
2798 assert(link);
2799 assert(link->manager);
2800 assert(link->network);
2801
2802 m = link->manager;
2803 duid = link_get_duid(link);
2804
2805 if (!link_requires_uuid(link))
2806 return 1;
2807
2808 if (m->has_product_uuid) {
2809 (void) duid_set_uuid(duid, m->product_uuid);
2810 return 1;
2811 }
2812
2813 if (!m->links_requesting_uuid) {
2814 r = manager_request_product_uuid(m, link);
2815 if (r < 0) {
2816 if (r == -ENOMEM)
2817 return r;
2818
ab4dd984
ZJS		 2819 log_link_warning_errno(link, r,
2820 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 2821 return 1;
2822 }
2823 } else {
2824 r = set_put(m->links_requesting_uuid, link);
2825 if (r < 0)
2826 return log_oom();
2827
2828 r = set_put(m->duids_requesting_uuid, duid);
2829 if (r < 0)
2830 return log_oom();
2831 }
2832
2833 return 0;
2834}
2835
e6bf7774 2836static int link_initialized_and_synced(Link *link) {
505f8da7 2837 Network *network;
505f8da7
TG		 2838 int r;
2839
2840 assert(link);
2841 assert(link->ifname);
2842 assert(link->manager);
2843
bd08ce56
YW		 2844 /* We may get called either from the asynchronous netlink callback,
2845 * or directly for link_add() if running in a container. See link_add(). */
2846 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2847 return 0;
505f8da7 2848
6a7a4e4d 2849 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2850 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2851
0d4ad91d
AR		 2852 r = link_new_bound_by_list(link);
2853 if (r < 0)
2854 return r;
2855
2856 r = link_handle_bound_by_list(link);
2857 if (r < 0)
2858 return r;
2859
c4a03a56 2860 if (!link->network) {
51517f9e 2861 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 2862 &link->mac, &network);
2863 if (r == -ENOENT) {
2864 link_enter_unmanaged(link);
4232cf04 2865 return 0;
a09dc546
DM		 2866 } else if (r == 0 && network->unmanaged) {
2867 link_enter_unmanaged(link);
2868 return 0;
c4a03a56
TG		 2869 } else if (r < 0)
2870 return r;
505f8da7 2871
c4a03a56
TG		 2872 if (link->flags & IFF_LOOPBACK) {
2873 if (network->link_local != ADDRESS_FAMILY_NO)
2874 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2875
c4a03a56
TG		 2876 if (network->dhcp != ADDRESS_FAMILY_NO)
2877 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2878
c4a03a56
TG		 2879 if (network->dhcp_server)
2880 log_link_debug(link, "Ignoring DHCP server for loopback link");
2881 }
bd2efe92 2882
7d342c03 2883 r = network_apply(network, link);
c4a03a56
TG		 2884 if (r < 0)
2885 return r;
2886 }
505f8da7 2887
0d4ad91d
AR		 2888 r = link_new_bound_to_list(link);
2889 if (r < 0)
2890 return r;
2891
27dfc982
YW		 2892 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2893 * link_configure() is called later asynchronously. */
2894 r = link_configure_duid(link);
2895 if (r <= 0)
2896 return r;
2897
a748b692
TG		 2898 r = link_configure(link);
2899 if (r < 0)
2900 return r;
2901
4232cf04 2902 return 0;
505f8da7
TG		 2903}
2904
302a796f
YW		 2905static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2906 (void) link_initialized_and_synced(link);
e6bf7774
YW		 2907 return 1;
2908}
2909
51517f9e 2910int link_initialized(Link *link, sd_device *device) {
4afd3348 2911 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2912 int r;
2913
2914 assert(link);
2915 assert(link->manager);
2916 assert(link->manager->rtnl);
2917 assert(device);
2918
8434fd5c 2919 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2920 return 0;
2921
51517f9e 2922 if (link->sd_device)
679b3605
TG		 2923 return 0;
2924
79008bdd 2925 log_link_debug(link, "udev initialized link");
bd08ce56 2926 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 2927
51517f9e 2928 link->sd_device = sd_device_ref(device);
4f561e8e 2929
3c9b8860
TG		 2930 /* udev has initialized the link, but we don't know if we have yet
2931 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2932 * when it returns we know that the pending NEWLINKs have already been
2933 * processed and that we are up-to-date */
4f561e8e 2934
3c9b8860
TG		 2935 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2936 link->ifindex);
4f561e8e
TG		 2937 if (r < 0)
2938 return r;
2939
302a796f
YW		 2940 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
2941 link_netlink_destroy_callback, link);
4f561e8e
TG		 2942 if (r < 0)
2943 return r;
2944
5da8149f
TG		 2945 link_ref(link);
2946
4f561e8e
TG		 2947 return 0;
2948}
2949
c4a03a56 2950static int link_load(Link *link) {
0bc70f1d
TG		 2951 _cleanup_free_ char *network_file = NULL,
2952 *addresses = NULL,
f703cc2c 2953 *routes = NULL,
0bc70f1d
TG		 2954 *dhcp4_address = NULL,
2955 *ipv4ll_address = NULL;
2956 union in_addr_union address;
f703cc2c 2957 union in_addr_union route_dst;
c598ac76 2958 const char *p;
c4a03a56
TG		 2959 int r;
2960
2961 assert(link);
2962
aa8fbc74 2963 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 2964 "NETWORK_FILE", &network_file,
2965 "ADDRESSES", &addresses,
f703cc2c 2966 "ROUTES", &routes,
0bc70f1d 2967 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 2968 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 2969 if (r < 0 && r != -ENOENT)
2970 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
2971
2972 if (network_file) {
2973 Network *network;
2974 char *suffix;
2975
2976 /* drop suffix */
2977 suffix = strrchr(network_file, '.');
2978 if (!suffix) {
2979 log_link_debug(link, "Failed to get network name from %s", network_file);
2980 goto network_file_fail;
2981 }
2982 *suffix = '\0';
2983
2984 r = network_get_by_name(link->manager, basename(network_file), &network);
2985 if (r < 0) {
2986 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
2987 goto network_file_fail;
2988 }
2989
7d342c03 2990 r = network_apply(network, link);
c4a03a56
TG		 2991 if (r < 0)
2992 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
2993 }
2994
2995network_file_fail:
2996
2997 if (addresses) {
c598ac76 2998 p = addresses;
c4a03a56 2999
c598ac76
TG		 3000 for (;;) {
3001 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3002 char *prefixlen_str;
3003 int family;
3004 unsigned char prefixlen;
c4a03a56 3005
c598ac76
TG		 3006 r = extract_first_word(&p, &address_str, NULL, 0);
3007 if (r < 0) {
3008 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3009 continue;
928bc597
TA		 3010 }
3011 if (r == 0)
c598ac76
TG		 3012 break;
3013
3014 prefixlen_str = strchr(address_str, '/');
c4a03a56 3015 if (!prefixlen_str) {
c598ac76 3016 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3017 continue;
3018 }
3019
313cefa1 3020 *prefixlen_str++ = '\0';
c4a03a56
TG		 3021
3022 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3023 if (r != 1) {
3024 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3025 continue;
3026 }
3027
c598ac76 3028 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3029 if (r < 0) {
c598ac76 3030 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3031 continue;
3032 }
3033
3034 r = address_add(link, family, &address, prefixlen, NULL);
3035 if (r < 0)
3036 return log_link_error_errno(link, r, "Failed to add address: %m");
3037 }
3038 }
3039
f703cc2c 3040 if (routes) {
74544b4e
TA		 3041 p = routes;
3042
c598ac76 3043 for (;;) {
f833694d 3044 Route *route;
c598ac76 3045 _cleanup_free_ char *route_str = NULL;
4afd3348 3046 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 3047 usec_t lifetime;
f703cc2c
TG		 3048 char *prefixlen_str;
3049 int family;
3050 unsigned char prefixlen, tos, table;
3051 uint32_t priority;
3052
c598ac76
TG		 3053 r = extract_first_word(&p, &route_str, NULL, 0);
3054 if (r < 0) {
3055 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3056 continue;
928bc597
TA		 3057 }
3058 if (r == 0)
c598ac76
TG		 3059 break;
3060
3061 prefixlen_str = strchr(route_str, '/');
f703cc2c 3062 if (!prefixlen_str) {
c598ac76 3063 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3064 continue;
3065 }
3066
313cefa1 3067 *prefixlen_str++ = '\0';
f703cc2c 3068
f833694d
TG		 3069 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3070 if (r != 5) {
3071 log_link_debug(link,
3072 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3073 prefixlen_str);
f703cc2c
TG		 3074 continue;
3075 }
3076
c598ac76 3077 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3078 if (r < 0) {
c598ac76 3079 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3080 continue;
3081 }
3082
f833694d 3083 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3084 if (r < 0)
3085 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3086
f02ba163 3087 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3088 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3089 0, route_expire_handler, route);
3090 if (r < 0)
3091 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3092 }
3093
3094 route->lifetime = lifetime;
3095 sd_event_source_unref(route->expire);
1cc6c93a 3096 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3097 }
3098 }
3099
0bc70f1d
TG		 3100 if (dhcp4_address) {
3101 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3102 if (r < 0) {
b68d26b8 3103 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3104 goto dhcp4_address_fail;
3105 }
3106
b1c626f6 3107 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3108 if (r < 0)
b68d26b8 3109 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3110
3111 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3112 if (r < 0)
b68d26b8 3113 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3114 }
3115
3116dhcp4_address_fail:
3117
3118 if (ipv4ll_address) {
3119 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3120 if (r < 0) {
b68d26b8 3121 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3122 goto ipv4ll_address_fail;
3123 }
3124
3125 r = sd_ipv4ll_new(&link->ipv4ll);
3126 if (r < 0)
b68d26b8 3127 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3128
3129 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3130 if (r < 0)
b68d26b8 3131 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3132 }
3133
3134ipv4ll_address_fail:
3135
c4a03a56
TG		 3136 return 0;
3137}
3138
1c4baffc 3139int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3140 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3141 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3142 Link *link;
5a937ea2 3143 int r;
505f8da7
TG		 3144
3145 assert(m);
fbbeb65a 3146 assert(m->rtnl);
505f8da7
TG		 3147 assert(message);
3148 assert(ret);
3149
3150 r = link_new(m, message, ret);
3151 if (r < 0)
3152 return r;
3153
3154 link = *ret;
3155
6a7a4e4d 3156 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3157
c4a03a56
TG		 3158 r = link_load(link);
3159 if (r < 0)
3160 return r;
3161
75f86906 3162 if (detect_container() <= 0) {
505f8da7 3163 /* not in a container, udev will be around */
ae06ab10 3164 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3165 r = sd_device_new_from_device_id(&device, ifindex_str);
3166 if (r < 0) {
3167 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3168 goto failed;
3169 }
505f8da7 3170
5a937ea2 3171 r = sd_device_get_is_initialized(device);
51517f9e
YW		 3172 if (r < 0) {
3173 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3174 goto failed;
3175 }
5a937ea2 3176 if (r == 0) {
505f8da7 3177 /* not yet ready */
79008bdd 3178 log_link_debug(link, "link pending udev initialization...");
505f8da7 3179 return 0;
3c4cb064 3180 }
505f8da7 3181
299ad32d
YW		 3182 r = device_is_renaming(device);
3183 if (r < 0) {
3184 log_link_warning_errno(link, r, "Failed to determine the device is renamed or not: %m");
3185 goto failed;
3186 }
3187 if (r > 0) {
3188 log_link_debug(link, "Interface is under renaming, pending initialization.");
3189 return 0;
3190 }
3191
4f561e8e
TG		 3192 r = link_initialized(link, device);
3193 if (r < 0)
5c416fc4 3194 goto failed;
4f561e8e 3195 } else {
e6bf7774 3196 r = link_initialized_and_synced(link);
4f561e8e 3197 if (r < 0)
5c416fc4 3198 goto failed;
4f561e8e 3199 }
505f8da7 3200
a748b692 3201 return 0;
5c416fc4
TG		 3202failed:
3203 link_enter_failed(link);
3204 return r;
a748b692
TG		 3205}
3206
c601ebf7 3207int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3208 int r;
3209
3210 assert(link);
3211
3212 log_link_info(link, "Gained IPv6LL");
3213
c601ebf7 3214 link->ipv6ll_address = *address;
e7ab854c
TG		 3215 link_check_ready(link);
3216
b9ea3d2e 3217 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3218 r = link_acquire_ipv6_conf(link);
3219 if (r < 0) {
3220 link_enter_failed(link);
3221 return r;
3222 }
3223 }
3224
3225 return 0;
3226}
3227
9c0a72f9
TG		 3228static int link_carrier_gained(Link *link) {
3229 int r;
3230
3231 assert(link);
3232
b9ea3d2e 3233 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3234 r = link_acquire_conf(link);
3235 if (r < 0) {
3236 link_enter_failed(link);
3237 return r;
3238 }
6fc25497 3239
289e6774 3240 r = link_request_set_addresses(link);
6fc25497
SS		 3241 if (r < 0)
3242 return r;
9c0a72f9
TG		 3243 }
3244
0d4ad91d
AR		 3245 r = link_handle_bound_by_list(link);
3246 if (r < 0)
3247 return r;
3248
9c0a72f9
TG		 3249 return 0;
3250}
3251
3252static int link_carrier_lost(Link *link) {
3253 int r;
3254
3255 assert(link);
3256
25e992ba 3257 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3258 return 0;
3259
fbdb6605 3260 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3261 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3262 * configuration and stop the clients as well. */
97e7fb39
SS		 3263 if (link->setting_mtu)
3264 return 0;
3265
9c0a72f9
TG		 3266 r = link_stop_clients(link);
3267 if (r < 0) {
3268 link_enter_failed(link);
3269 return r;
3270 }
3271
28464ae0
SS		 3272 if (link_dhcp4_server_enabled(link))
3273 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3274
3104883d
SS		 3275 r = link_drop_config(link);
3276 if (r < 0)
3277 return r;
3278
f258e948
MP		 3279 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3280 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3281 r = link_drop_foreign_config(link);
3282 if (r < 0)
3283 return r;
3284 }
3104883d 3285
0d4ad91d
AR		 3286 r = link_handle_bound_by_list(link);
3287 if (r < 0)
3288 return r;
3289
9c0a72f9
TG		 3290 return 0;
3291}
3292
3293int link_carrier_reset(Link *link) {
3294 int r;
3295
3296 assert(link);
3297
3298 if (link_has_carrier(link)) {
3299 r = link_carrier_lost(link);
3300 if (r < 0)
3301 return r;
3302
3303 r = link_carrier_gained(link);
3304 if (r < 0)
3305 return r;
3306
6a7a4e4d 3307 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3308 }
3309
3310 return 0;
3311}
3312
1c4baffc 3313int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3314 struct ether_addr mac;
ca4e095a 3315 const char *ifname;
afe7fd56 3316 uint32_t mtu;
a61bb41c 3317 bool had_carrier, carrier_gained, carrier_lost;
bb262ef0 3318 int old_master, r;
22936833 3319
dd3efc09 3320 assert(link);
b8941f74 3321 assert(link->ifname);
22936833
TG		 3322 assert(m);
3323
7619683b 3324 if (link->state == LINK_STATE_LINGER) {
5238e957 3325 log_link_info(link, "Link re-added");
289e6774 3326 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3327
3328 r = link_new_carrier_maps(link);
3329 if (r < 0)
3330 return r;
7619683b
TG		 3331 }
3332
1c4baffc 3333 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3334 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3335 Manager *manager = link->manager;
b8941f74 3336
30de2b89 3337 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3338
30de2b89
YW		 3339 link_drop(link);
3340 r = link_add(manager, m, &link);
3341 if (r < 0)
3342 return r;
b8941f74
TG		 3343 }
3344
1c4baffc 3345 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3346 if (r >= 0 && mtu > 0) {
3347 link->mtu = mtu;
4e964aa0 3348 if (link->original_mtu == 0) {
afe7fd56 3349 link->original_mtu = mtu;
6a7a4e4d 3350 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3351 }
3352
3353 if (link->dhcp_client) {
3c9b8860
TG		 3354 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3355 link->mtu);
fc95c359
YW		 3356 if (r < 0)
3357 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3358 }
7465dd22
PF		 3359
3360 if (link->radv) {
3361 r = sd_radv_set_mtu(link->radv, link->mtu);
3362 if (r < 0)
3363 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3364 }
9842de0d 3365 }
69629de9 3366
e9189a1f
TG		 3367 /* The kernel may broadcast NEWLINK messages without the MAC address
3368 set, simply ignore them. */
1c4baffc 3369 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3370 if (r >= 0) {
3c9b8860
TG		 3371 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3372 ETH_ALEN)) {
c49b33ac 3373
3c9b8860
TG		 3374 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3375 ETH_ALEN);
c49b33ac 3376
79008bdd 3377 log_link_debug(link, "MAC address: "
20861203
TG		 3378 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3379 mac.ether_addr_octet[0],
3380 mac.ether_addr_octet[1],
3381 mac.ether_addr_octet[2],
3382 mac.ether_addr_octet[3],
3383 mac.ether_addr_octet[4],
3384 mac.ether_addr_octet[5]);
c49b33ac 3385
20861203
TG		 3386 if (link->ipv4ll) {
3387 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3388 if (r < 0)
3389 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3390 }
c49b33ac 3391
20861203 3392 if (link->dhcp_client) {
3c9b8860 3393 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3394 (const uint8_t *) &link->mac,
3395 sizeof (link->mac),
3396 ARPHRD_ETHER);
6a7a4e4d
LP		 3397 if (r < 0)
3398 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3399
fff1f40c
YW		 3400 r = dhcp4_set_client_identifier(link);
3401 if (r < 0)
3402 return r;
c49b33ac 3403 }
4138fb2c
PF		 3404
3405 if (link->dhcp6_client) {
f24648a6 3406 const DUID* duid = link_get_duid(link);
8341a5c3 3407
4138fb2c 3408 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3409 (const uint8_t *) &link->mac,
3410 sizeof (link->mac),
3411 ARPHRD_ETHER);
6a7a4e4d
LP		 3412 if (r < 0)
3413 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3414
8217ed5e
TH		 3415 if (link->network->iaid_set) {
3416 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3417 link->network->iaid);
3418 if (r < 0)
3419 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3420 }
413708d1 3421
8341a5c3
ZJS		 3422 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3423 duid->type,
3424 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3425 duid->raw_data_len);
413708d1
VK		 3426 if (r < 0)
3427 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3428 }
7465dd22
PF		 3429
3430 if (link->radv) {
3431 r = sd_radv_set_mac(link->radv, &link->mac);
3432 if (r < 0)
3433 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3434 }
420d2058
SS		 3435
3436 if (link->ndisc) {
3437 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3438 if (r < 0)
3439 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3440 }
c49b33ac 3441 }
4f882b2a
TG		 3442 }
3443
bb262ef0
YW		 3444 old_master = link->master_ifindex;
3445 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
3446
a61bb41c
TG		 3447 had_carrier = link_has_carrier(link);
3448
bb262ef0 3449 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 3450 if (r < 0)
3451 return r;
3452
273eec24
LP		 3453 r = link_update_lldp(link);
3454 if (r < 0)
3455 return r;
3456
a61bb41c
TG		 3457 carrier_gained = !had_carrier && link_has_carrier(link);
3458 carrier_lost = had_carrier && !link_has_carrier(link);
3459
3460 if (carrier_gained) {
6a7a4e4d 3461 log_link_info(link, "Gained carrier");
a61bb41c 3462
9c0a72f9
TG		 3463 r = link_carrier_gained(link);
3464 if (r < 0)
3465 return r;
a61bb41c 3466 } else if (carrier_lost) {
6a7a4e4d 3467 log_link_info(link, "Lost carrier");
a61bb41c 3468
9c0a72f9
TG		 3469 r = link_carrier_lost(link);
3470 if (r < 0)
a61bb41c 3471 return r;
a61bb41c
TG		 3472 }
3473
3474 return 0;
dd3efc09 3475}
fe8db0c5 3476
b295beea
LP		 3477static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3478 bool space = false;
3479 Iterator i;
3480 Link *link;
3481
3482 assert(f);
3483 assert(prefix);
3484
3485 if (hashmap_isempty(h))
3486 return;
3487
0d536673 3488 fputs(prefix, f);
b295beea
LP		 3489 HASHMAP_FOREACH(link, h, i) {
3490 if (space)
0d536673 3491 fputc(' ', f);
b295beea
LP		 3492
3493 fprintf(f, "%i", link->ifindex);
3494 space = true;
3495 }
3496
0d536673 3497 fputc('\n', f);
b295beea
LP		 3498}
3499
fe8db0c5 3500int link_save(Link *link) {
68a8723c 3501 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3502 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3503 const char *admin_state, *oper_state;
e7780c8d 3504 Address *a;
c1eb9872 3505 Route *route;
e7780c8d 3506 Iterator i;
fe8db0c5
TG		 3507 int r;
3508
3509 assert(link);
3510 assert(link->state_file);
68a8723c 3511 assert(link->lease_file);
bbf7c048
TG		 3512 assert(link->manager);
3513
370e9930 3514 if (link->state == LINK_STATE_LINGER) {
6990fb6b 3515 (void) unlink(link->state_file);
370e9930
TG		 3516 return 0;
3517 }
3518
34437b4f
LP		 3519 link_lldp_save(link);
3520
deb2e523
TG		 3521 admin_state = link_state_to_string(link->state);
3522 assert(admin_state);
3523
e375dcde
TG		 3524 oper_state = link_operstate_to_string(link->operstate);
3525 assert(oper_state);
deb2e523 3526
fe8db0c5
TG		 3527 r = fopen_temporary(link->state_file, &f, &temp_path);
3528 if (r < 0)
6a7a4e4d 3529 goto fail;
fe8db0c5 3530
5512a963 3531 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3532
3533 fprintf(f,
3534 "# This is private data. Do not parse.\n"
deb2e523 3535 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3536 "OPER_STATE=%s\n",
3537 admin_state, oper_state);
fe8db0c5 3538
bcb7a07e 3539 if (link->network) {
fe0e16db
YW		 3540 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
3541 const char *dhcp_domainname = NULL, *p;
07bdc70d 3542 sd_dhcp6_lease *dhcp6_lease = NULL;
5512a963 3543 unsigned j;
fe0e16db 3544 bool space;
07bdc70d 3545
c1a38904
MTL		 3546 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3547 yes_no(link->network->required_for_online));
3548
4ac77d63
YW		 3549 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s\n",
3550 strempty(link_operstate_to_string(link->network->required_operstate_for_online)));
3551
07bdc70d 3552 if (link->dhcp6_client) {
4058d339
TG		 3553 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3554 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3555 log_link_debug(link, "No DHCPv6 lease");
3556 }
b0e39c82 3557
adc5b2e2
TG		 3558 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3559
0d536673 3560 fputs("DNS=", f);
ea352b40 3561 space = false;
5512a963
LP		 3562
3563 for (j = 0; j < link->network->n_dns; j++) {
3564 _cleanup_free_ char *b = NULL;
3565
3566 r = in_addr_to_string(link->network->dns[j].family,
3567 &link->network->dns[j].address, &b);
3568 if (r < 0) {
3569 log_debug_errno(r, "Failed to format address, ignoring: %m");
3570 continue;
3571 }
3572
3573 if (space)
0d536673
LP		 3574 fputc(' ', f);
3575 fputs(b, f);
5512a963
LP		 3576 space = true;
3577 }
d5314fff 3578
27cb34f5 3579 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3580 link->dhcp_lease) {
3581 const struct in_addr *addresses;
3582
3583 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
072320ea
TH		 3584 if (r > 0)
3585 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3586 space = true;
07bdc70d
PF		 3587 }
3588
27cb34f5 3589 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3590 struct in6_addr *in6_addrs;
3591
3592 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3593 if (r > 0) {
3594 if (space)
0d536673 3595 fputc(' ', f);
07bdc70d 3596 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3597 space = true;
3598 }
3599 }
3600
3601 /* Make sure to flush out old entries before we use the NDISC data */
3602 ndisc_vacuum(link);
3603
b296797f 3604 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3605 NDiscRDNSS *dd;
3606
3607 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3608 if (space)
0d536673 3609 fputc(' ', f);
1e7a0e21
LP		 3610
3611 serialize_in6_addrs(f, &dd->address, 1);
3612 space = true;
b0e39c82
TG		 3613 }
3614 }
3615
0d536673 3616 fputc('\n', f);
b0e39c82 3617
0d536673 3618 fputs("NTP=", f);
ea352b40 3619 space = false;
3df9bec5 3620 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3621
27cb34f5 3622 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3623 link->dhcp_lease) {
3624 const struct in_addr *addresses;
3625
3626 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
072320ea
TH		 3627 if (r > 0)
3628 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3629 space = true;
07bdc70d
PF		 3630 }
3631
27cb34f5 3632 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3633 struct in6_addr *in6_addrs;
3634 char **hosts;
07bdc70d
PF		 3635
3636 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3637 &in6_addrs);
3638 if (r > 0) {
3639 if (space)
0d536673 3640 fputc(' ', f);
07bdc70d
PF		 3641 serialize_in6_addrs(f, in6_addrs, r);
3642 space = true;
3643 }
3644
3645 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3646 if (r > 0)
3647 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3648 }
3649
0d536673 3650 fputc('\n', f);
bd8f6538 3651
b2a81c0b 3652 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3653 if (link->dhcp_lease) {
b2a81c0b 3654 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3655 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3656 }
b2a81c0b
LP		 3657 if (dhcp6_lease)
3658 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3659 }
3660
fe0e16db
YW		 3661 fputs("DOMAINS=", f);
3662 space = false;
3663 ORDERED_SET_FOREACH(p, link->network->search_domains, i)
3664 fputs_with_space(f, p, NULL, &space);
07bdc70d 3665
1e7a0e21
LP		 3666 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3667 NDiscDNSSL *dd;
9b4d1882 3668
1e7a0e21
LP		 3669 if (dhcp_domainname)
3670 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3671 if (dhcp_domains)
3672 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3673 if (dhcp6_domains)
3674 fputstrv(f, dhcp6_domains, NULL, &space);
3675
3676 SET_FOREACH(dd, link->ndisc_dnssl, i)
3677 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3678 }
b2a81c0b 3679
0d536673 3680 fputc('\n', f);
6192b846 3681
fe0e16db
YW		 3682 fputs("ROUTE_DOMAINS=", f);
3683 space = false;
3684 ORDERED_SET_FOREACH(p, link->network->route_domains, i)
3685 fputs_with_space(f, p, NULL, &space);
b2a81c0b 3686
1e7a0e21
LP		 3687 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3688 NDiscDNSSL *dd;
b2a81c0b 3689
1e7a0e21
LP		 3690 if (dhcp_domainname)
3691 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3692 if (dhcp_domains)
3693 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3694 if (dhcp6_domains)
3695 fputstrv(f, dhcp6_domains, NULL, &space);
3696
3697 SET_FOREACH(dd, link->ndisc_dnssl, i)
3698 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3699 }
b2a81c0b 3700
0d536673 3701 fputc('\n', f);
67272d15 3702
3c9b8860 3703 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3704 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3705 fprintf(f, "MDNS=%s\n",
3706 resolve_support_to_string(link->network->mdns));
7ece6f58
LP		 3707 if (link->network->dns_default_route >= 0)
3708 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
e7780c8d 3709
c9299be2
IT		 3710 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3711 fprintf(f, "DNS_OVER_TLS=%s\n",
3712 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 3713
ad6c0475
LP		 3714 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3715 fprintf(f, "DNSSEC=%s\n",
3716 dnssec_mode_to_string(link->network->dnssec_mode));
3717
8a516214
LP		 3718 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3719 const char *n;
3720
0d536673 3721 fputs("DNSSEC_NTA=", f);
8a516214 3722 space = false;
d390f8ef
LP		 3723 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3724 fputs_with_space(f, n, NULL, &space);
0d536673 3725 fputc('\n', f);
8a516214
LP		 3726 }
3727
0d536673 3728 fputs("ADDRESSES=", f);
e7780c8d
TG		 3729 space = false;
3730 SET_FOREACH(a, link->addresses, i) {
3731 _cleanup_free_ char *address_str = NULL;
3732
3733 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3734 if (r < 0)
3735 goto fail;
3736
e7780c8d
TG		 3737 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3738 space = true;
3739 }
0d536673 3740 fputc('\n', f);
c1eb9872 3741
0d536673 3742 fputs("ROUTES=", f);
c1eb9872
TG		 3743 space = false;
3744 SET_FOREACH(route, link->routes, i) {
3745 _cleanup_free_ char *route_str = NULL;
3746
3747 r = in_addr_to_string(route->family, &route->dst, &route_str);
3748 if (r < 0)
3749 goto fail;
3750
ecc3f340
ZJS		 3751 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3752 space ? " " : "", route_str,
f833694d 3753 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3754 space = true;
3755 }
3756
0d536673 3757 fputc('\n', f);
bcb7a07e 3758 }
7374f9d8 3759
b295beea
LP		 3760 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3761 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3762
8eb9058d 3763 if (link->dhcp_lease) {
0bc70f1d 3764 struct in_addr address;
8eb9058d
LP		 3765 const char *tz = NULL;
3766
0bc70f1d
TG		 3767 assert(link->network);
3768
8eb9058d
LP		 3769 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3770 if (r >= 0)
3771 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3772
0bc70f1d
TG		 3773 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3774 if (r >= 0) {
0d536673 3775 fputs("DHCP4_ADDRESS=", f);
072320ea 3776 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3777 fputc('\n', f);
0bc70f1d 3778 }
d9876a52 3779
bd91b83e 3780 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3781 if (r < 0)
c2d6bd61 3782 goto fail;
fe8db0c5 3783
7374f9d8 3784 fprintf(f,
b0e39c82
TG		 3785 "DHCP_LEASE=%s\n",
3786 link->lease_file);
deb2e523 3787 } else
6990fb6b 3788 (void) unlink(link->lease_file);
fe8db0c5 3789
0bc70f1d
TG		 3790 if (link->ipv4ll) {
3791 struct in_addr address;
3792
3793 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3794 if (r >= 0) {
0d536673 3795 fputs("IPV4LL_ADDRESS=", f);
072320ea 3796 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3797 fputc('\n', f);
0bc70f1d
TG		 3798 }
3799 }
3800
c2d6bd61
LP		 3801 r = fflush_and_check(f);
3802 if (r < 0)
3803 goto fail;
fe8db0c5 3804
c2d6bd61 3805 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3806 r = -errno;
c2d6bd61 3807 goto fail;
fe8db0c5
TG		 3808 }
3809
c2d6bd61 3810 return 0;
dacd6cee 3811
c2d6bd61 3812fail:
6a7a4e4d 3813 (void) unlink(link->state_file);
6a7a4e4d
LP		 3814 if (temp_path)
3815 (void) unlink(temp_path);
3816
dacd6cee 3817 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3818}
3819
84de38c5
TG		 3820/* The serialized state in /run is no longer up-to-date. */
3821void link_dirty(Link *link) {
3822 int r;
3823
3824 assert(link);
3825
0c241a37
SS		 3826 /* mark manager dirty as link is dirty */
3827 manager_dirty(link->manager);
3828
84de38c5
TG		 3829 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
3830 if (r < 0)
3831 /* allocation errors are ignored */
3832 return;
3833
3834 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 3835 if (r <= 0)
3836 /* don't take another ref if the link was already dirty */
84de38c5
TG		 3837 return;
3838
3839 link_ref(link);
3840}
3841
3842/* The serialized state in /run is up-to-date */
3843void link_clean(Link *link) {
3844 assert(link);
3845 assert(link->manager);
3846
1046bf9b 3847 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 3848}
3849
fe8db0c5 3850static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3851 [LINK_STATE_PENDING] = "pending",
bd08ce56 3852 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 3853 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 3854 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3855 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3856 [LINK_STATE_FAILED] = "failed",
370e9930 3857 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3858};
3859
3860DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
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