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network: stop DHCPv4 server in link_stop_clients()
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
53e1b683 1/* SPDX-License-Identifier: LGPL-2.1+ */
f579559b 2
9aa5d8ba 3#include <netinet/in.h>
f579559b 4#include <linux/if.h>
8f815e8b 5#include <linux/if_arp.h>
518cd6b5 6#include <linux/if_link.h>
4cc7a82c 7#include <unistd.h>
f579559b 8
b5efdb8a 9#include "alloc-util.h"
737f1405
YW		 10#include "bond.h"
11#include "bridge.h"
1346b1f0 12#include "bus-util.h"
27dfc982 13#include "dhcp-identifier.h"
bd91b83e 14#include "dhcp-lease-internal.h"
686d13b9 15#include "env-file.h"
4bb7cc82 16#include "ethtool-util.h"
3ffd4af2 17#include "fd-util.h"
cf1d700d 18#include "fileio.h"
737f1405 19#include "ipvlan.h"
ef118d00 20#include "missing_network.h"
cf1d700d 21#include "netlink-util.h"
c6f7c917 22#include "network-internal.h"
fb486c90 23#include "networkd-address-label.h"
093e3533 24#include "networkd-address.h"
3ddcbeea 25#include "networkd-can.h"
8fcf1d61 26#include "networkd-dhcp-server.h"
ca5ad760
YW		 27#include "networkd-dhcp4.h"
28#include "networkd-dhcp6.h"
ee446d57 29#include "networkd-fdb.h"
ca5ad760 30#include "networkd-ipv4ll.h"
a0e5c15d 31#include "networkd-ipv6-proxy-ndp.h"
6a1af3d4
YW		 32#include "networkd-link-bus.h"
33#include "networkd-link.h"
8e1ad1ea 34#include "networkd-lldp-tx.h"
23f53b99 35#include "networkd-manager.h"
dbf63196 36#include "networkd-mdb.h"
1e7a0e21 37#include "networkd-ndisc.h"
e4a71bf3 38#include "networkd-neighbor.h"
75156ccb 39#include "networkd-nexthop.h"
518cd6b5 40#include "networkd-sriov.h"
5e0534f1 41#include "networkd-sysctl.h"
7465dd22 42#include "networkd-radv.h"
bce67bbe 43#include "networkd-routing-policy-rule.h"
8d968fdd 44#include "networkd-wifi.h"
cf1d700d
TG		 45#include "set.h"
46#include "socket-util.h"
bf331d87 47#include "stat-util.h"
15a5e950 48#include "stdio-util.h"
8b43440b 49#include "string-table.h"
51517f9e 50#include "strv.h"
62e021a9 51#include "sysctl-util.h"
34658df2 52#include "tc.h"
e4de7287 53#include "tmpfile-util.h"
299ad32d 54#include "udev-util.h"
cf1d700d 55#include "util.h"
737f1405 56#include "vrf.h"
fc2f9534 57
2d792895 58bool link_ipv4ll_enabled(Link *link, AddressFamily mask) {
b9d74c40 59 assert(link);
910feb78 60 assert((mask & ~(ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) == 0);
b9d74c40 61
78c958f8
TG		 62 if (link->flags & IFF_LOOPBACK)
63 return false;
64
65 if (!link->network)
66 return false;
67
500b96eb 68 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 69 return false;
70
98d20a17 71 if (STRPTR_IN_SET(link->kind,
72 "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
b0486c73 73 "vti6", "nlmon", "xfrm", "bareudp"))
a8f5bba6
JD		 74 return false;
75
f410d463
YW		 76 /* L3 or L3S mode do not support ARP. */
77 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
78 return false;
79
f2bfcdb9
YW		 80 if (link->network->bond)
81 return false;
82
910feb78 83 return link->network->link_local & mask;
8bc17bb3
SS		 84}
85
f8f2f880 86bool link_ipv6ll_enabled(Link *link) {
b9d74c40
LP		 87 assert(link);
88
fa709992
LP		 89 if (!socket_ipv6_is_supported())
90 return false;
91
d0d6a4cd
TG		 92 if (link->flags & IFF_LOOPBACK)
93 return false;
94
95 if (!link->network)
96 return false;
97
500b96eb 98 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 99 return false;
100
101 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon"))
a8f5bba6
JD		 102 return false;
103
f2bfcdb9
YW		 104 if (link->network->bond)
105 return false;
106
e0ee46f2 107 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 108}
109
5e0534f1 110bool link_ipv6_enabled(Link *link) {
439689c6
SS		 111 assert(link);
112
113 if (!socket_ipv6_is_supported())
114 return false;
115
b102cdca 116 if (link->network->bond)
2b00a4e0
TY		 117 return false;
118
500b96eb 119 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 120 return false;
121
4cef7fe3 122 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
adfeee49
YW		 123 if (link_ipv6ll_enabled(link))
124 return true;
125
126 if (network_has_static_ipv6_configurations(link->network))
127 return true;
128
129 return false;
439689c6
SS		 130}
131
34bf3c00
YW		 132static bool link_is_enslaved(Link *link) {
133 if (link->flags & IFF_SLAVE)
134 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
135 return true;
136
34bf3c00
YW		 137 if (!link->network)
138 return false;
139
bb262ef0 140 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 141 return true;
142
bb262ef0
YW		 143 /* TODO: add conditions for other netdevs. */
144
34bf3c00
YW		 145 return false;
146}
147
45e11abf
YW		 148static void link_update_master_operstate(Link *link, NetDev *netdev) {
149 Link *master;
150
151 if (!netdev)
152 return;
153
7936917e
YW		 154 if (netdev->ifindex <= 0)
155 return;
156
45e11abf
YW		 157 if (link_get(link->manager, netdev->ifindex, &master) < 0)
158 return;
159
160 link_update_operstate(master, true);
161}
162
163void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 164 LinkOperationalState operstate;
1678fbb3
YW		 165 LinkCarrierState carrier_state;
166 LinkAddressState address_state;
35c5a9ca 167 _cleanup_strv_free_ char **p = NULL;
1678fbb3 168 uint8_t scope = RT_SCOPE_NOWHERE;
35c5a9ca 169 bool changed = false;
1678fbb3 170 Address *address;
14153d1b 171
84de38c5
TG		 172 assert(link);
173
174 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 175 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 176 else if (link_has_carrier(link)) {
1678fbb3
YW		 177 if (link_is_enslaved(link))
178 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 179 else
1678fbb3 180 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 181 } else if (link->flags & IFF_UP)
1678fbb3 182 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 183 else
1678fbb3 184 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 185
1678fbb3 186 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 187 Link *slave;
188
90e74a66 189 SET_FOREACH(slave, link->slaves) {
959f65d3 190 link_update_operstate(slave, false);
84de38c5 191
1678fbb3
YW		 192 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
193 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 194 }
959f65d3 195 }
84de38c5 196
90e74a66 197 SET_FOREACH(address, link->addresses) {
1678fbb3
YW		 198 if (!address_is_ready(address))
199 continue;
84de38c5 200
1678fbb3
YW		 201 if (address->scope < scope)
202 scope = address->scope;
203 }
84de38c5 204
1678fbb3 205 /* for operstate we also take foreign addresses into account */
90e74a66 206 SET_FOREACH(address, link->addresses_foreign) {
1678fbb3
YW		 207 if (!address_is_ready(address))
208 continue;
209
210 if (address->scope < scope)
211 scope = address->scope;
212 }
213
214 if (scope < RT_SCOPE_SITE)
215 /* universally accessible addresses found */
216 address_state = LINK_ADDRESS_STATE_ROUTABLE;
217 else if (scope < RT_SCOPE_HOST)
218 /* only link or site local addresses found */
219 address_state = LINK_ADDRESS_STATE_DEGRADED;
84de38c5 220 else
1678fbb3
YW		 221 /* no useful addresses found */
222 address_state = LINK_ADDRESS_STATE_OFF;
223
224 /* Mapping of address and carrier state vs operational state
225 * carrier state
226 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
227 * ------------------------------------------------------------------------------
228 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
229 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
230 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
231 */
84de38c5 232
1678fbb3
YW		 233 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
234 operstate = (LinkOperationalState) carrier_state;
235 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
236 operstate = LINK_OPERSTATE_ROUTABLE;
237 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
238 operstate = LINK_OPERSTATE_DEGRADED;
239 else
14153d1b
YW		 240 operstate = LINK_OPERSTATE_ENSLAVED;
241
35c5a9ca
YW		 242 if (link->carrier_state != carrier_state) {
243 link->carrier_state = carrier_state;
244 changed = true;
245 if (strv_extend(&p, "CarrierState") < 0)
246 log_oom();
247 }
959f65d3 248
35c5a9ca
YW		 249 if (link->address_state != address_state) {
250 link->address_state = address_state;
251 changed = true;
252 if (strv_extend(&p, "AddressState") < 0)
253 log_oom();
959f65d3
YW		 254 }
255
84de38c5
TG		 256 if (link->operstate != operstate) {
257 link->operstate = operstate;
35c5a9ca
YW		 258 changed = true;
259 if (strv_extend(&p, "OperationalState") < 0)
260 log_oom();
84de38c5 261 }
959f65d3 262
35c5a9ca
YW		 263 if (p)
264 link_send_changed_strv(link, p);
265 if (changed)
266 link_dirty(link);
267
45e11abf
YW		 268 if (also_update_master && link->network) {
269 link_update_master_operstate(link, link->network->bond);
270 link_update_master_operstate(link, link->network->bridge);
959f65d3 271 }
84de38c5
TG		 272}
273
51d18171
TG		 274#define FLAG_STRING(string, flag, old, new) \
275 (((old ^ new) & flag) \
276 ? ((old & flag) ? (" -" string) : (" +" string)) \
277 : "")
278
bb262ef0 279static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 280 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
281 uint8_t operstate;
282 int r;
283
284 assert(link);
285
286 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 287 if (r < 0)
288 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 289
1c4baffc 290 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 291 if (r < 0)
292 /* if we got a message without operstate, take it to mean
293 the state was unchanged */
294 operstate = link->kernel_operstate;
295
bb262ef0 296 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 297 return 0;
298
299 if (link->flags != flags) {
6a7a4e4d 300 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		 301 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
302 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
303 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
304 FLAG_STRING("UP", IFF_UP, link->flags, flags),
305 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
306 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
307 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
308 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
309 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
310 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
311 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
312 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
313 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
314 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
315 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
316 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
317 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
318 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
319 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
320
321 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
322 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
323 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
324 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
325 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
326 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
327 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
328 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
329
330 /* link flags are currently at most 18 bits, let's align to
331 * printing 20 */
332 if (unknown_flags_added)
79008bdd 333 log_link_debug(link,
6a7a4e4d 334 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 335 unknown_flags_added);
336
337 if (unknown_flags_removed)
79008bdd 338 log_link_debug(link,
6a7a4e4d 339 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 340 unknown_flags_removed);
341 }
342
343 link->flags = flags;
344 link->kernel_operstate = operstate;
345
959f65d3 346 link_update_operstate(link, true);
51d18171
TG		 347
348 return 0;
349}
350
1c4baffc 351static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 352 _cleanup_(link_unrefp) Link *link = NULL;
6cad256d 353 const char *ifname, *kind = NULL;
b710e6b6 354 unsigned short iftype;
572b21d9
YW		 355 int r, ifindex;
356 uint16_t type;
f579559b 357
0c2f9b84 358 assert(manager);
505f8da7 359 assert(message);
f579559b
TG		 360 assert(ret);
361
6cad256d
TJ		 362 /* check for link kind */
363 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
364 if (r == 0) {
db2f8a2e 365 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 366 r = sd_netlink_message_exit_container(message);
367 if (r < 0)
368 return r;
369 }
370
1c4baffc 371 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 372 if (r < 0)
373 return r;
374 else if (type != RTM_NEWLINK)
375 return -EINVAL;
376
377 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
378 if (r < 0)
379 return r;
380 else if (ifindex <= 0)
381 return -EINVAL;
382
b710e6b6
LP		 383 r = sd_rtnl_message_link_get_type(message, &iftype);
384 if (r < 0)
385 return r;
386
1c4baffc 387 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 388 if (r < 0)
389 return r;
390
17f9c355 391 link = new(Link, 1);
f579559b
TG		 392 if (!link)
393 return -ENOMEM;
394
17f9c355
YW		 395 *link = (Link) {
396 .n_ref = 1,
397 .manager = manager,
398 .state = LINK_STATE_PENDING,
17f9c355
YW		 399 .ifindex = ifindex,
400 .iftype = iftype,
15761549
YW		 401
402 .n_dns = (unsigned) -1,
403 .dns_default_route = -1,
404 .llmnr = _RESOLVE_SUPPORT_INVALID,
405 .mdns = _RESOLVE_SUPPORT_INVALID,
406 .dnssec_mode = _DNSSEC_MODE_INVALID,
407 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
17f9c355
YW		 408 };
409
505f8da7
TG		 410 link->ifname = strdup(ifname);
411 if (!link->ifname)
412 return -ENOMEM;
f579559b 413
6cad256d
TJ		 414 if (kind) {
415 link->kind = strdup(kind);
416 if (!link->kind)
417 return -ENOMEM;
418 }
419
cbff7170
TJ		 420 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
421 if (r < 0)
422 log_link_debug_errno(link, r, "New device has no master, continuing without");
423
1c4baffc 424 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 425 if (r < 0)
34437b4f 426 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 427
c643bda5 428 r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac);
4bb7cc82
YW		 429 if (r < 0)
430 log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
431
c643bda5
YW		 432 r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver);
433 if (r < 0)
434 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
435
572b21d9
YW		 436 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &link->alternative_names);
437 if (r < 0 && r != -ENODATA)
438 return r;
439
34437b4f 440 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 441 return -ENOMEM;
fe8db0c5 442
34437b4f 443 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 444 return -ENOMEM;
445
34437b4f 446 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 447 return -ENOMEM;
448
d5099efc 449 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 450 if (r < 0)
451 return r;
452
453 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 454 if (r < 0)
455 return r;
456
bb262ef0 457 r = link_update_flags(link, message, false);
51d18171
TG		 458 if (r < 0)
459 return r;
460
1cc6c93a 461 *ret = TAKE_PTR(link);
f579559b
TG		 462
463 return 0;
464}
465
15761549
YW		 466void link_ntp_settings_clear(Link *link) {
467 link->ntp = strv_free(link->ntp);
468}
469
470void link_dns_settings_clear(Link *link) {
e77bd3fd
YW		 471 if (link->n_dns != (unsigned) -1)
472 for (unsigned i = 0; i < link->n_dns; i++)
473 in_addr_full_free(link->dns[i]);
15761549
YW		 474 link->dns = mfree(link->dns);
475 link->n_dns = (unsigned) -1;
476
477 link->search_domains = ordered_set_free_free(link->search_domains);
478 link->route_domains = ordered_set_free_free(link->route_domains);
479
480 link->dns_default_route = -1;
481 link->llmnr = _RESOLVE_SUPPORT_INVALID;
482 link->mdns = _RESOLVE_SUPPORT_INVALID;
483 link->dnssec_mode = _DNSSEC_MODE_INVALID;
484 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
485
486 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
487}
488
1a6bb31f
YW		 489static void link_free_engines(Link *link) {
490 if (!link)
491 return;
492
493 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
494 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
495 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
1a6bb31f
YW		 496
497 link->lldp = sd_lldp_unref(link->lldp);
498
499 ndisc_flush(link);
500
501 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
502 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 503 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
1a6bb31f
YW		 504 link->ndisc = sd_ndisc_unref(link->ndisc);
505 link->radv = sd_radv_unref(link->radv);
10fa21c0 506 link->dhcp_acd = sd_ipv4acd_unref(link->dhcp_acd);
1a6bb31f
YW		 507}
508
8301aa0b 509static Link *link_free(Link *link) {
8301aa0b 510 assert(link);
f579559b 511
15761549
YW		 512 link_ntp_settings_clear(link);
513 link_dns_settings_clear(link);
514
8eec0b9d
YW		 515 link->routes = set_free(link->routes);
516 link->routes_foreign = set_free(link->routes_foreign);
6e537f62
YW		 517 link->dhcp_routes = set_free(link->dhcp_routes);
518 link->dhcp_routes_old = set_free(link->dhcp_routes_old);
1633c457
YW		 519 link->dhcp6_routes = set_free(link->dhcp6_routes);
520 link->dhcp6_routes_old = set_free(link->dhcp6_routes_old);
521 link->dhcp6_pd_routes = set_free(link->dhcp6_pd_routes);
522 link->dhcp6_pd_routes_old = set_free(link->dhcp6_pd_routes_old);
69203fba 523 link->ndisc_routes = set_free(link->ndisc_routes);
adda1ed9 524
8eec0b9d
YW		 525 link->nexthops = set_free(link->nexthops);
526 link->nexthops_foreign = set_free(link->nexthops_foreign);
c16c7808 527
8eec0b9d
YW		 528 link->neighbors = set_free(link->neighbors);
529 link->neighbors_foreign = set_free(link->neighbors_foreign);
d1bdafd2 530
8eec0b9d
YW		 531 link->addresses = set_free(link->addresses);
532 link->addresses_foreign = set_free(link->addresses_foreign);
aa651e88 533 link->pool_addresses = set_free(link->pool_addresses);
e5526518 534 link->static_addresses = set_free(link->static_addresses);
1633c457
YW		 535 link->dhcp6_addresses = set_free(link->dhcp6_addresses);
536 link->dhcp6_addresses_old = set_free(link->dhcp6_addresses_old);
537 link->dhcp6_pd_addresses = set_free(link->dhcp6_pd_addresses);
538 link->dhcp6_pd_addresses_old = set_free(link->dhcp6_pd_addresses_old);
69203fba 539 link->ndisc_addresses = set_free(link->ndisc_addresses);
adda1ed9 540
7272b25e 541 link_lldp_emit_stop(link);
1a6bb31f 542 link_free_engines(link);
68a8723c 543 free(link->lease_file);
49699bac
SS		 544 free(link->lldp_file);
545
c166a070 546 free(link->ifname);
572b21d9 547 strv_free(link->alternative_names);
ceac4078 548 free(link->kind);
8d968fdd 549 free(link->ssid);
c643bda5 550 free(link->driver);
6cad256d 551
db2f8a2e 552 (void) unlink(link->state_file);
fe8db0c5 553 free(link->state_file);
c166a070 554
51517f9e 555 sd_device_unref(link->sd_device);
b5db00e5 556
0d4ad91d 557 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 558 hashmap_free(link->bound_by_links);
559
5f707e12 560 set_free_with_destructor(link->slaves, link_unref);
033295c1 561
c9c908a6
YW		 562 network_unref(link->network);
563
8301aa0b 564 return mfree(link);
14b746f7
TG		 565}
566
8301aa0b 567DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 568
11a7f229
TG		 569int link_get(Manager *m, int ifindex, Link **ret) {
570 Link *link;
11a7f229
TG		 571
572 assert(m);
e856ed00 573 assert(ifindex > 0);
11a7f229
TG		 574 assert(ret);
575
ae06ab10 576 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 577 if (!link)
578 return -ENODEV;
579
580 *ret = link;
581
582 return 0;
583}
584
af9ba57a 585void link_set_state(Link *link, LinkState state) {
e331e246
TG		 586 assert(link);
587
588 if (link->state == state)
589 return;
590
0beb9542
YW		 591 log_link_debug(link, "State changed: %s -> %s",
592 link_state_to_string(link->state),
593 link_state_to_string(state));
594
e331e246
TG		 595 link->state = state;
596
597 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 598}
599
57bd6899
TG		 600static void link_enter_unmanaged(Link *link) {
601 assert(link);
602
e331e246 603 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 604
84de38c5 605 link_dirty(link);
57bd6899
TG		 606}
607
2a99eed0 608int link_stop_engines(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 609 int r = 0, k;
610
611 assert(link);
612 assert(link->manager);
613 assert(link->manager->event);
614
80060352
ZJS		 615 bool keep_dhcp = may_keep_dhcp &&
616 link->network &&
617 (link->manager->restarting ||
618 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
619
84add3cd 620 if (!keep_dhcp) {
111bb8f9 621 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 622 if (k < 0)
36c7d709 623 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 624 }
625
84add3cd
YW		 626 k = sd_ipv4acd_stop(link->dhcp_acd);
627 if (k < 0)
628 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client for DHCPv4: %m");
a7df5cae 629
2a99eed0
YW		 630 k = sd_dhcp_server_stop(link->dhcp_server);
631 if (k < 0)
632 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 server: %m");
633
84add3cd
YW		 634 k = sd_ipv4ll_stop(link->ipv4ll);
635 if (k < 0)
636 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f 637
490ccbd5 638 k = ipv4_dad_stop(link);
2488e4d9
YW		 639 if (k < 0)
640 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
051e77ca 641
84add3cd
YW		 642 k = sd_dhcp6_client_stop(link->dhcp6_client);
643 if (k < 0)
644 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
4138fb2c 645
2ffd6d73
YW		 646 k = dhcp6_pd_remove(link);
647 if (k < 0)
648 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
1633c457 649
84add3cd
YW		 650 k = sd_ndisc_stop(link->ndisc);
651 if (k < 0)
652 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c 653
84add3cd
YW		 654 k = sd_radv_stop(link->radv);
655 if (k < 0)
656 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
7465dd22 657
7272b25e 658 link_lldp_emit_stop(link);
111bb8f9
TG		 659 return r;
660}
661
b22d8a00 662void link_enter_failed(Link *link) {
ef1ba606 663 assert(link);
f882c247 664
370e9930 665 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 666 return;
667
6a7a4e4d 668 log_link_warning(link, "Failed");
449f7554 669
e331e246 670 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 671
2a99eed0 672 (void) link_stop_engines(link, false);
111bb8f9 673
84de38c5 674 link_dirty(link);
f882c247
TG		 675}
676
7033af49
YW		 677static int link_join_netdevs_after_configured(Link *link) {
678 NetDev *netdev;
7033af49
YW		 679 int r;
680
90e74a66 681 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7033af49
YW		 682 if (netdev->ifindex > 0)
683 /* Assume already enslaved. */
684 continue;
685
686 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
687 continue;
688
689 log_struct(LOG_DEBUG,
690 LOG_LINK_INTERFACE(link),
691 LOG_NETDEV_INTERFACE(netdev),
692 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
693
694 r = netdev_join(netdev, link, NULL);
695 if (r < 0)
696 return log_struct_errno(LOG_WARNING, r,
697 LOG_LINK_INTERFACE(link),
698 LOG_NETDEV_INTERFACE(netdev),
699 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
700 }
701
702 return 0;
703}
704
e3a7b048 705static void link_enter_configured(Link *link) {
dd43110f
TG		 706 assert(link);
707 assert(link->network);
e3a7b048 708
289e6774 709 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 710 return;
dd43110f 711
e331e246 712 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 713
7033af49
YW		 714 (void) link_join_netdevs_after_configured(link);
715
84de38c5 716 link_dirty(link);
dd43110f
TG		 717}
718
6accfd31
DA		 719void link_check_ready(Link *link) {
720 Address *a;
6accfd31
DA		 721
722 assert(link);
723
5f58af25
YW		 724 if (link->state == LINK_STATE_CONFIGURED)
725 return;
726
727 if (link->state != LINK_STATE_CONFIGURING) {
728 log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31 729 return;
39373cb9 730 }
6accfd31
DA		 731
732 if (!link->network)
733 return;
734
39373cb9
YW		 735 if (!link->addresses_configured) {
736 log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 737 return;
39373cb9 738 }
6accfd31 739
39373cb9
YW		 740 if (!link->neighbors_configured) {
741 log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
6accfd31 742 return;
39373cb9 743 }
6accfd31 744
90e74a66 745 SET_FOREACH(a, link->addresses)
39373cb9
YW		 746 if (!address_is_ready(a)) {
747 _cleanup_free_ char *str = NULL;
748
749 (void) in_addr_to_string(a->family, &a->in_addr, &str);
750 log_link_debug(link, "%s(): an address %s/%d is not ready.", __func__, strnull(str), a->prefixlen);
6aa5773b 751 return;
39373cb9 752 }
6aa5773b 753
39373cb9
YW		 754 if (!link->static_routes_configured) {
755 log_link_debug(link, "%s(): static routes are not configured.", __func__);
6accfd31 756 return;
39373cb9 757 }
6accfd31 758
39373cb9
YW		 759 if (!link->static_nexthops_configured) {
760 log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 761 return;
39373cb9 762 }
c16c7808 763
39373cb9
YW		 764 if (!link->routing_policy_rules_configured) {
765 log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 766 return;
39373cb9 767 }
6accfd31 768
39373cb9
YW		 769 if (!link->tc_configured) {
770 log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
4ecdcb07 771 return;
39373cb9 772 }
4ecdcb07 773
39373cb9
YW		 774 if (!link->sr_iov_configured) {
775 log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 776 return;
39373cb9 777 }
518cd6b5 778
1f241589
YW		 779 if (!link->bridge_mdb_configured) {
780 log_link_debug(link, "%s(): Bridge MDB is not configured.", __func__);
781 return;
782 }
783
463797c1 784 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
50550722
YW		 785 bool has_ndisc_address = false;
786 NDiscAddress *n;
6accfd31 787
1c09d84e 788 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !link->ipv4ll_address_configured) {
39373cb9 789 log_link_debug(link, "%s(): IPv4LL is not configured.", __func__);
463797c1 790 return;
39373cb9 791 }
6accfd31 792
463797c1 793 if (link_ipv6ll_enabled(link) &&
39373cb9
YW		 794 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
795 log_link_debug(link, "%s(): IPv6LL is not configured.", __func__);
463797c1 796 return;
39373cb9 797 }
6accfd31 798
90e74a66 799 SET_FOREACH(n, link->ndisc_addresses)
50550722
YW		 800 if (!n->marked) {
801 has_ndisc_address = true;
802 break;
803 }
804
15797d6a 805 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
50550722 806 !link->dhcp_address && set_isempty(link->dhcp6_addresses) && !has_ndisc_address &&
15797d6a
YW		 807 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
808 log_link_debug(link, "%s(): DHCP4 or DHCP6 is enabled but no dynamic address is assigned yet.", __func__);
659ad3a0
YW		 809 return;
810 }
811
1633c457 812 if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_dhcp6_pd_is_enabled(link) || link_ipv6_accept_ra_enabled(link)) {
39373cb9
YW		 813 if (!link->dhcp4_configured &&
814 !(link->dhcp6_address_configured && link->dhcp6_route_configured) &&
815 !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) &&
d98c546d 816 !(link->ndisc_addresses_configured && link->ndisc_routes_configured) &&
1c09d84e 817 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
39373cb9
YW		 818 /* When DHCP or RA is enabled, at least one protocol must provide an address, or
819 * an IPv4ll fallback address must be configured. */
820 log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
821 return;
822 }
823
d98c546d 824 log_link_debug(link, "%s(): dhcp4:%s dhcp6_addresses:%s dhcp_routes:%s dhcp_pd_addresses:%s dhcp_pd_routes:%s ndisc_addresses:%s ndisc_routes:%s",
39373cb9
YW		 825 __func__,
826 yes_no(link->dhcp4_configured),
827 yes_no(link->dhcp6_address_configured),
828 yes_no(link->dhcp6_route_configured),
829 yes_no(link->dhcp6_pd_address_configured),
830 yes_no(link->dhcp6_pd_route_configured),
d98c546d
YW		 831 yes_no(link->ndisc_addresses_configured),
832 yes_no(link->ndisc_routes_configured));
39373cb9 833 }
463797c1 834 }
6accfd31 835
5f58af25 836 link_enter_configured(link);
6accfd31
DA		 837
838 return;
839}
840
682c65b0 841static int link_set_static_configs(Link *link) {
f882c247
TG		 842 int r;
843
844 assert(link);
845 assert(link->network);
f5be5601 846 assert(link->state != _LINK_STATE_INVALID);
f882c247 847
2428613f 848 /* Reset all *_configured flags we are configuring. */
9b966cee 849 link->request_static_addresses = false;
2428613f 850 link->addresses_configured = false;
6aa5773b 851 link->addresses_ready = false;
2428613f
YW		 852 link->neighbors_configured = false;
853 link->static_routes_configured = false;
c16c7808 854 link->static_nexthops_configured = false;
2428613f
YW		 855 link->routing_policy_rules_configured = false;
856
f6bb7ac5
TJ		 857 r = link_set_bridge_fdb(link);
858 if (r < 0)
859 return r;
860
1f241589
YW		 861 r = link_set_bridge_mdb(link);
862 if (r < 0)
863 return r;
864
58f1fe9a 865 r = link_set_neighbors(link);
f3ef324d
YW		 866 if (r < 0)
867 return r;
e4a71bf3 868
682c65b0
YW		 869 r = link_set_addresses(link);
870 if (r < 0)
871 return r;
bd6379ec 872
fe2bc17c
YW		 873 r = link_set_address_labels(link);
874 if (r < 0)
875 return r;
f882c247 876
e5526518 877 /* now that we can figure out a default address for the dhcp server, start it */
5ae0fb7f
YW		 878 r = dhcp4_server_configure(link);
879 if (r < 0)
880 return r;
d4cdbea5 881
f882c247
TG		 882 return 0;
883}
884
3a390124 885static int link_configure_continue(Link *link);
55dc8c4a 886
302a796f 887static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 888 int r;
889
890 assert(m);
891 assert(link);
892 assert(link->ifname);
893
55dc8c4a
YW		 894 link->setting_mtu = false;
895
5da8149f 896 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 897 return 1;
898
1c4baffc 899 r = sd_netlink_message_get_errno(m);
4ff296b0 900 if (r < 0)
5ecb131d 901 log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring");
4ff296b0
YW		 902 else
903 log_link_debug(link, "Setting MTU done.");
55dc8c4a 904
4ff296b0 905 if (link->state == LINK_STATE_INITIALIZED) {
3a390124 906 r = link_configure_continue(link);
4ff296b0
YW		 907 if (r < 0)
908 link_enter_failed(link);
909 }
4f882b2a
TG		 910
911 return 1;
912}
913
933c70a0 914int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 915 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 916 int r;
917
918 assert(link);
919 assert(link->manager);
920 assert(link->manager->rtnl);
921
40288ece
YW		 922 if (mtu == 0 || link->setting_mtu)
923 return 0;
924
933c70a0 925 if (link->mtu == mtu)
ee493106
YW		 926 return 0;
927
6a7a4e4d 928 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 929
6a7a4e4d
LP		 930 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
931 if (r < 0)
932 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 933
44b598a1 934 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 935 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
936 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 937
938 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
d236718c 939 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes");
44b598a1 940
72c2500b 941 mtu = IPV6_MIN_MTU;
44b598a1
SS		 942 }
943
1c4baffc 944 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 945 if (r < 0)
946 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 947
302a796f
YW		 948 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
949 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 950 if (r < 0)
951 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 952
ae941762 953 link_ref(link);
1046bf9b 954 link->setting_mtu = true;
b226d99b 955
4f882b2a
TG		 956 return 0;
957}
958
f6fcc1c2
YW		 959static bool link_reduces_vlan_mtu(Link *link) {
960 /* See netif_reduces_vlan_mtu() in kernel. */
961 return streq_ptr(link->kind, "macsec");
962}
963
964static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
965 uint32_t mtu = 0;
966 NetDev *dev;
f6fcc1c2 967
90e74a66 968 HASHMAP_FOREACH(dev, link->network->stacked_netdevs)
f6fcc1c2
YW		 969 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
970 /* See vlan_dev_change_mtu() in kernel. */
971 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
972
973 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
974 /* See macvlan_change_mtu() in kernel. */
975 mtu = dev->mtu;
976
977 return mtu;
978}
979
980static int link_configure_mtu(Link *link) {
981 uint32_t mtu;
982
983 assert(link);
984 assert(link->network);
985
986 if (link->network->mtu > 0)
987 return link_set_mtu(link, link->network->mtu);
988
989 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
990 if (link->mtu >= mtu)
991 return 0;
992
993 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
994 "If it is not desired, then please explicitly specify MTUBytes= setting.",
995 link->mtu, mtu);
996
997 return link_set_mtu(link, mtu);
998}
999
302a796f 1000static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1001 int r;
1002
1003 assert(m);
1004 assert(link);
1005 assert(link->ifname);
1006
1007 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1008 return 1;
1009
1010 r = sd_netlink_message_get_errno(m);
1011 if (r < 0)
5ecb131d 1012 log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring");
99d2baa2
SS		 1013
1014 return 1;
1015}
1016
1017static int link_set_flags(Link *link) {
1018 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1019 unsigned ifi_change = 0;
1020 unsigned ifi_flags = 0;
1021 int r;
1022
1023 assert(link);
1024 assert(link->manager);
1025 assert(link->manager->rtnl);
1026
1027 if (link->flags & IFF_LOOPBACK)
1028 return 0;
1029
1030 if (!link->network)
1031 return 0;
1032
866e6b7a 1033 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1034 return 0;
1035
1036 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1037 if (r < 0)
1038 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1039
1040 if (link->network->arp >= 0) {
1041 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1042 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1043 }
1044
1045 if (link->network->multicast >= 0) {
1046 ifi_change |= IFF_MULTICAST;
1047 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1048 }
1049
866e6b7a
SS		 1050 if (link->network->allmulticast >= 0) {
1051 ifi_change |= IFF_ALLMULTI;
1052 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1053 }
1054
99d2baa2
SS		 1055 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1056 if (r < 0)
1057 return log_link_error_errno(link, r, "Could not set link flags: %m");
1058
302a796f
YW		 1059 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1060 link_netlink_destroy_callback, link);
99d2baa2
SS		 1061 if (r < 0)
1062 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1063
1064 link_ref(link);
1065
1066 return 0;
1067}
1068
e7ab854c
TG		 1069static int link_acquire_ipv6_conf(Link *link) {
1070 int r;
1071
1072 assert(link);
1073
2ffd6d73 1074 if (link->ndisc) {
e7ab854c
TG		 1075 log_link_debug(link, "Discovering IPv6 routers");
1076
1e7a0e21 1077 r = sd_ndisc_start(link->ndisc);
63348d13 1078 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1079 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1080 }
1081
086b8853 1082 if (link->radv) {
7465dd22
PF		 1083 assert(link->radv);
1084 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1085
1086 log_link_debug(link, "Starting IPv6 Router Advertisements");
1087
fd3ef936
YW		 1088 r = radv_emit_dns(link);
1089 if (r < 0)
1090 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
1091
7465dd22
PF		 1092 r = sd_radv_start(link->radv);
1093 if (r < 0 && r != -EBUSY)
1094 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1095 }
1096
838d39af
SS		 1097 if (link_dhcp6_enabled(link) && IN_SET(link->network->dhcp6_without_ra,
1098 DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST,
1099 DHCP6_CLIENT_START_MODE_SOLICIT)) {
cd305af1
SS		 1100 assert(link->dhcp6_client);
1101 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1102
838d39af 1103 r = dhcp6_request_address(link, link->network->dhcp6_without_ra == DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST);
cd305af1 1104 if (r < 0 && r != -EBUSY)
1633c457 1105 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
cd305af1
SS		 1106 else
1107 log_link_debug(link, "Acquiring DHCPv6 lease");
1108 }
1109
1633c457
YW		 1110 r = dhcp6_request_prefix_delegation(link);
1111 if (r < 0)
1112 return log_link_warning_errno(link, r, "Failed to request DHCPv6 prefix delegation: %m");
10752343 1113
e7ab854c
TG		 1114 return 0;
1115}
1116
6fc25497 1117static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1118 int r;
1119
1120 assert(link);
ff254138
TG		 1121 assert(link->manager);
1122 assert(link->manager->event);
1123
910feb78 1124 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1125 assert(link->ipv4ll);
ff254138 1126
6a7a4e4d 1127 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1128
1129 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1130 if (r < 0)
1131 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1132 }
1133
2ffd6d73 1134 if (link->dhcp_client) {
6a7a4e4d 1135 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1136
5c1d3fc9 1137 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1138 if (r < 0)
1139 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1140 }
ff254138 1141
6fc25497
SS		 1142 return 0;
1143}
1144
1145static int link_acquire_conf(Link *link) {
1146 int r;
1147
1148 assert(link);
1149
1150 r = link_acquire_ipv4_conf(link);
1151 if (r < 0)
1152 return r;
1153
3f7cc080 1154 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1155 r = link_acquire_ipv6_conf(link);
1156 if (r < 0)
1157 return r;
1158 }
1159
2ffd6d73
YW		 1160 r = link_lldp_emit_start(link);
1161 if (r < 0)
1162 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
8e1ad1ea 1163
ff254138
TG		 1164 return 0;
1165}
1166
a61bb41c 1167bool link_has_carrier(Link *link) {
deb2e523
TG		 1168 /* see Documentation/networking/operstates.txt in the kernel sources */
1169
a61bb41c 1170 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1171 return true;
1172
a61bb41c 1173 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1174 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1175 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1176 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1177 return true;
1178
1179 return false;
1180}
1181
0e2fdb83
SS		 1182static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1183 int r;
1184
1185 assert(link);
1186
9524014e
DS		 1187 link->setting_genmode = false;
1188
0e2fdb83
SS		 1189 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1190 return 1;
1191
1192 r = sd_netlink_message_get_errno(m);
1193 if (r < 0)
5ecb131d 1194 log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring");
9524014e
DS		 1195 else
1196 log_link_debug(link, "Setting address genmode done.");
1197
1198 if (link->state == LINK_STATE_INITIALIZED) {
1199 r = link_configure_continue(link);
1200 if (r < 0)
1201 link_enter_failed(link);
1202 }
0e2fdb83
SS		 1203
1204 return 1;
1205}
1206
1207static int link_configure_addrgen_mode(Link *link) {
1208 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1209 uint8_t ipv6ll_mode;
1210 int r;
1211
1212 assert(link);
1213 assert(link->network);
1214 assert(link->manager);
1215 assert(link->manager->rtnl);
1216
9524014e 1217 if (!socket_ipv6_is_supported() || link->setting_genmode)
9f6e82e6
YW		 1218 return 0;
1219
0e2fdb83
SS		 1220 log_link_debug(link, "Setting address genmode for link");
1221
1222 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1223 if (r < 0)
1224 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1225
1226 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1227 if (r < 0)
1228 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1229
1230 r = sd_netlink_message_open_container(req, AF_INET6);
1231 if (r < 0)
1232 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1233
1234 if (!link_ipv6ll_enabled(link))
1235 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
6f6296b9 1236 else if (link->network->ipv6ll_address_gen_mode < 0) {
a6f1848a
SS		 1237 r = sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL);
1238 if (r < 0) {
1239 /* The file may not exist. And even if it exists, when stable_secret is unset,
1240 * reading the file fails with EIO. */
1241 log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret: %m");
1242
1243 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1244 } else
1245 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1246 } else
6f6296b9 1247 ipv6ll_mode = link->network->ipv6ll_address_gen_mode;
0e2fdb83
SS		 1248
1249 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1250 if (r < 0)
1251 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1252
1253 r = sd_netlink_message_close_container(req);
1254 if (r < 0)
1255 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1256
1257 r = sd_netlink_message_close_container(req);
1258 if (r < 0)
1259 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1260
1261 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1262 link_netlink_destroy_callback, link);
1263 if (r < 0)
1264 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1265
1266 link_ref(link);
9524014e 1267 link->setting_genmode = true;
0e2fdb83
SS		 1268
1269 return 0;
1270}
1271
302a796f 1272static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1273 int r;
1274
1746cf2a
TG		 1275 assert(link);
1276
5da8149f 1277 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1278 return 1;
1279
1c4baffc 1280 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1281 if (r < 0)
26d6b214 1282 /* we warn but don't fail the link, as it may be brought up later */
5ecb131d 1283 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
45ad2c13 1284
f882c247
TG		 1285 return 1;
1286}
1287
1cc84f3b 1288static int link_up(Link *link) {
4afd3348 1289 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1290 int r;
1291
f882c247 1292 assert(link);
c106cc36 1293 assert(link->network);
f882c247
TG		 1294 assert(link->manager);
1295 assert(link->manager->rtnl);
1296
6a7a4e4d 1297 log_link_debug(link, "Bringing link up");
449f7554 1298
6a7a4e4d
LP		 1299 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1300 if (r < 0)
1301 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1302
2b2d8603 1303 /* set it free if not enslaved with networkd */
6cb955c6 1304 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1305 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1306 if (r < 0)
1307 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1308 }
1309
5d4795f3 1310 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1311 if (r < 0)
1312 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1313
c106cc36 1314 if (link->network->mac) {
1c4baffc 1315 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1316 if (r < 0)
1317 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1318 }
1319
302a796f
YW		 1320 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1321 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1322 if (r < 0)
1323 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1324
b226d99b
TG		 1325 link_ref(link);
1326
f882c247
TG		 1327 return 0;
1328}
1329
302a796f 1330static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1331 int r;
1332
1333 assert(link);
1334
1335 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1336 return 1;
1337
1c4baffc 1338 r = sd_netlink_message_get_errno(m);
0d4ad91d 1339 if (r < 0)
5ecb131d 1340 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
0d4ad91d
AR		 1341
1342 return 1;
1343}
1344
8e54db83 1345int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1346 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1347 int r;
1348
1349 assert(link);
1350 assert(link->manager);
1351 assert(link->manager->rtnl);
1352
6a7a4e4d 1353 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1354
1355 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1356 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1357 if (r < 0)
1358 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1359
1360 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1361 if (r < 0)
1362 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1363
8e54db83
YW		 1364 r = netlink_call_async(link->manager->rtnl, NULL, req,
1365 callback ?: link_down_handler,
302a796f 1366 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1367 if (r < 0)
1368 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1369
1370 link_ref(link);
1371
1372 return 0;
1373}
1374
89fe6535
SS		 1375static int link_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1376 int r;
1377
1378 assert(link);
1379
1380 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1381 return 1;
1382
1383 r = sd_netlink_message_get_errno(m);
1384 if (r < 0)
1385 log_link_message_warning_errno(link, m, r, "Could not set group for the interface");
1386
1387 return 1;
1388}
1389
1390static int link_set_group(Link *link) {
1391 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1392 int r;
1393
1394 assert(link);
1395 assert(link->network);
1396 assert(link->manager);
1397 assert(link->manager->rtnl);
1398
1399 if (link->network->group <= 0)
1400 return 0;
1401
1402 log_link_debug(link, "Setting group");
1403
1404 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1405 if (r < 0)
1406 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1407
1408 r = sd_netlink_message_append_u32(req, IFLA_GROUP, link->network->group);
1409 if (r < 0)
1410 return log_link_error_errno(link, r, "Could not set link group: %m");
1411
1412 r = netlink_call_async(link->manager->rtnl, NULL, req, link_group_handler,
1413 link_netlink_destroy_callback, link);
1414 if (r < 0)
1415 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1416
1417 link_ref(link);
1418
1419 return 0;
1420}
1421
0d4ad91d
AR		 1422static int link_handle_bound_to_list(Link *link) {
1423 Link *l;
0d4ad91d
AR		 1424 int r;
1425 bool required_up = false;
1426 bool link_is_up = false;
1427
1428 assert(link);
1429
1430 if (hashmap_isempty(link->bound_to_links))
1431 return 0;
1432
1433 if (link->flags & IFF_UP)
1434 link_is_up = true;
1435
90e74a66 1436 HASHMAP_FOREACH (l, link->bound_to_links)
0d4ad91d
AR		 1437 if (link_has_carrier(l)) {
1438 required_up = true;
1439 break;
1440 }
1441
1442 if (!required_up && link_is_up) {
8e54db83 1443 r = link_down(link, NULL);
0d4ad91d
AR		 1444 if (r < 0)
1445 return r;
1446 } else if (required_up && !link_is_up) {
1447 r = link_up(link);
1448 if (r < 0)
1449 return r;
1450 }
1451
1452 return 0;
1453}
1454
1455static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 1456 Link *l;
1457 int r;
1458
1459 assert(link);
1460
1461 if (hashmap_isempty(link->bound_by_links))
1462 return 0;
1463
90e74a66 1464 HASHMAP_FOREACH (l, link->bound_by_links) {
0d4ad91d
AR		 1465 r = link_handle_bound_to_list(l);
1466 if (r < 0)
1467 return r;
1468 }
1469
1470 return 0;
1471}
1472
1473static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1474 int r;
1475
1476 assert(link);
1477 assert(carrier);
1478
1479 if (link == carrier)
1480 return 0;
1481
1482 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1483 return 0;
1484
1485 r = hashmap_ensure_allocated(h, NULL);
1486 if (r < 0)
1487 return r;
1488
1489 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1490 if (r < 0)
1491 return r;
1492
1493 return 0;
1494}
1495
1496static int link_new_bound_by_list(Link *link) {
1497 Manager *m;
1498 Link *carrier;
0d4ad91d
AR		 1499 int r;
1500 bool list_updated = false;
1501
1502 assert(link);
1503 assert(link->manager);
1504
1505 m = link->manager;
1506
90e74a66 1507 HASHMAP_FOREACH(carrier, m->links) {
0d4ad91d
AR		 1508 if (!carrier->network)
1509 continue;
1510
1511 if (strv_isempty(carrier->network->bind_carrier))
1512 continue;
1513
191a3f16 1514 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 1515 r = link_put_carrier(link, carrier, &link->bound_by_links);
1516 if (r < 0)
1517 return r;
1518
1519 list_updated = true;
1520 }
1521 }
1522
1523 if (list_updated)
84de38c5 1524 link_dirty(link);
0d4ad91d 1525
90e74a66 1526 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 1527 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1528 if (r < 0)
1529 return r;
1530
84de38c5 1531 link_dirty(carrier);
0d4ad91d
AR		 1532 }
1533
1534 return 0;
1535}
1536
1537static int link_new_bound_to_list(Link *link) {
1538 Manager *m;
1539 Link *carrier;
0d4ad91d
AR		 1540 int r;
1541 bool list_updated = false;
1542
1543 assert(link);
1544 assert(link->manager);
1545
1546 if (!link->network)
1547 return 0;
1548
1549 if (strv_isempty(link->network->bind_carrier))
1550 return 0;
1551
1552 m = link->manager;
1553
90e74a66 1554 HASHMAP_FOREACH (carrier, m->links) {
191a3f16 1555 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 1556 r = link_put_carrier(link, carrier, &link->bound_to_links);
1557 if (r < 0)
1558 return r;
1559
1560 list_updated = true;
1561 }
1562 }
1563
1564 if (list_updated)
84de38c5 1565 link_dirty(link);
0d4ad91d 1566
90e74a66 1567 HASHMAP_FOREACH (carrier, link->bound_to_links) {
0d4ad91d
AR		 1568 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1569 if (r < 0)
1570 return r;
1571
84de38c5 1572 link_dirty(carrier);
0d4ad91d
AR		 1573 }
1574
1575 return 0;
1576}
1577
1578static int link_new_carrier_maps(Link *link) {
1579 int r;
1580
1581 r = link_new_bound_by_list(link);
1582 if (r < 0)
1583 return r;
1584
1585 r = link_handle_bound_by_list(link);
1586 if (r < 0)
1587 return r;
1588
1589 r = link_new_bound_to_list(link);
1590 if (r < 0)
1591 return r;
1592
1593 r = link_handle_bound_to_list(link);
1594 if (r < 0)
1595 return r;
1596
1597 return 0;
1598}
1599
1600static void link_free_bound_to_list(Link *link) {
1601 Link *bound_to;
0d4ad91d 1602
90e74a66 1603 HASHMAP_FOREACH (bound_to, link->bound_to_links) {
0d4ad91d
AR		 1604 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
1605
1606 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 1607 link_dirty(bound_to);
0d4ad91d
AR		 1608 }
1609
1610 return;
1611}
1612
1613static void link_free_bound_by_list(Link *link) {
1614 Link *bound_by;
0d4ad91d 1615
90e74a66 1616 HASHMAP_FOREACH (bound_by, link->bound_by_links) {
0d4ad91d
AR		 1617 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
1618
1619 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 1620 link_dirty(bound_by);
0d4ad91d
AR		 1621 link_handle_bound_to_list(bound_by);
1622 }
1623 }
1624
1625 return;
1626}
1627
1628static void link_free_carrier_maps(Link *link) {
1629 bool list_updated = false;
1630
1631 assert(link);
1632
1633 if (!hashmap_isempty(link->bound_to_links)) {
1634 link_free_bound_to_list(link);
1635 list_updated = true;
1636 }
1637
1638 if (!hashmap_isempty(link->bound_by_links)) {
1639 link_free_bound_by_list(link);
1640 list_updated = true;
1641 }
1642
1643 if (list_updated)
84de38c5 1644 link_dirty(link);
0d4ad91d
AR		 1645
1646 return;
1647}
1648
5f707e12
YW		 1649static int link_append_to_master(Link *link, NetDev *netdev) {
1650 Link *master;
1651 int r;
1652
1653 assert(link);
1654 assert(netdev);
1655
1656 r = link_get(link->manager, netdev->ifindex, &master);
1657 if (r < 0)
1658 return r;
1659
de7fef4b 1660 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 1661 if (r <= 0)
5f707e12
YW		 1662 return r;
1663
1664 link_ref(link);
1665 return 0;
1666}
1667
1668static void link_drop_from_master(Link *link, NetDev *netdev) {
1669 Link *master;
1670
1671 assert(link);
1672
1673 if (!link->manager || !netdev)
1674 return;
1675
1676 if (link_get(link->manager, netdev->ifindex, &master) < 0)
1677 return;
1678
1679 link_unref(set_remove(master->slaves, link));
1680}
1681
1682static void link_detach_from_manager(Link *link) {
1683 if (!link || !link->manager)
1684 return;
1685
1686 link_unref(set_remove(link->manager->links_requesting_uuid, link));
1687 link_clean(link);
1688
1689 /* The following must be called at last. */
1690 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
1691 link_unref(link);
1692}
1693
0d4ad91d
AR		 1694void link_drop(Link *link) {
1695 if (!link || link->state == LINK_STATE_LINGER)
1696 return;
1697
1698 link_set_state(link, LINK_STATE_LINGER);
1699
1700 link_free_carrier_maps(link);
1701
5f707e12
YW		 1702 if (link->network) {
1703 link_drop_from_master(link, link->network->bridge);
1704 link_drop_from_master(link, link->network->bond);
1705 }
1706
6a7a4e4d 1707 log_link_debug(link, "Link removed");
0d4ad91d 1708
db2f8a2e 1709 (void) unlink(link->state_file);
c4397d94 1710 link_detach_from_manager(link);
0d4ad91d
AR		 1711}
1712
3f265037 1713static int link_joined(Link *link) {
f882c247
TG		 1714 int r;
1715
ef1ba606 1716 assert(link);
f5be5601 1717 assert(link->network);
dd3efc09 1718
0d4ad91d
AR		 1719 if (!hashmap_isempty(link->bound_to_links)) {
1720 r = link_handle_bound_to_list(link);
1721 if (r < 0)
1722 return r;
1723 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 1724 r = link_up(link);
1725 if (r < 0) {
1726 link_enter_failed(link);
1727 return r;
1728 }
ef1ba606 1729 }
f882c247 1730
9ed794a3 1731 if (link->network->bridge) {
e1853b00 1732 r = link_set_bridge(link);
6a7a4e4d
LP		 1733 if (r < 0)
1734 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 1735
1736 r = link_append_to_master(link, link->network->bridge);
1737 if (r < 0)
1738 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 1739 }
1740
eb64b435 1741 if (link->network->bond) {
7fcee284 1742 r = link_set_bond(link);
eb64b435
SS		 1743 if (r < 0)
1744 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 1745
45e11abf 1746 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 1747 if (r < 0)
1748 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 1749 }
1750
34d7f2c9
YW		 1751 r = link_set_bridge_vlan(link);
1752 if (r < 0)
1753 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
13b498f9 1754
c1835a42
RM		 1755 /* Skip setting up addresses until it gets carrier,
1756 or it would try to set addresses twice,
1757 which is bad for non-idempotent steps. */
dad2d78e 1758 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 1759 return 0;
1760
b425c3ae 1761 link_set_state(link, LINK_STATE_CONFIGURING);
0e569a43
YW		 1762
1763 r = link_acquire_conf(link);
1764 if (r < 0)
1765 return r;
1766
682c65b0 1767 return link_set_static_configs(link);
02b59d57
TG		 1768}
1769
302a796f 1770static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 1771 int r;
1772
1746cf2a 1773 assert(link);
ef1ba606 1774 assert(link->network);
34bf3c00 1775 assert(link->enslaving > 0);
02b59d57 1776
313cefa1 1777 link->enslaving--;
52433f6b 1778
5da8149f 1779 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 1780 return 1;
1781
1c4baffc 1782 r = sd_netlink_message_get_errno(m);
856f962c 1783 if (r < 0 && r != -EEXIST) {
5ecb131d 1784 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG		 1785 link_enter_failed(link);
1786 return 1;
4ff296b0
YW		 1787 }
1788
1789 log_link_debug(link, "Joined netdev");
02b59d57 1790
34bf3c00 1791 if (link->enslaving == 0) {
4ff296b0
YW		 1792 r = link_joined(link);
1793 if (r < 0)
1794 link_enter_failed(link);
34bf3c00 1795 }
02b59d57
TG		 1796
1797 return 1;
1798}
1799
3f265037 1800static int link_enter_join_netdev(Link *link) {
6a0a2f86 1801 NetDev *netdev;
02b59d57
TG		 1802 int r;
1803
1804 assert(link);
1805 assert(link->network);
bd08ce56 1806 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 1807
289e6774 1808 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 1809
84de38c5 1810 link_dirty(link);
34bf3c00 1811 link->enslaving = 0;
02b59d57 1812
d9c67ea1 1813 if (link->network->bond) {
cbff7170
TJ		 1814 if (link->network->bond->state == NETDEV_STATE_READY &&
1815 link->network->bond->ifindex == link->master_ifindex)
1816 return link_joined(link);
1817
f2341e0a
LP		 1818 log_struct(LOG_DEBUG,
1819 LOG_LINK_INTERFACE(link),
1820 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1821 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 1822
34bf3c00
YW		 1823 link->enslaving++;
1824
f2341e0a 1825 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 1826 if (r < 0) {
f2341e0a
LP		 1827 log_struct_errno(LOG_WARNING, r,
1828 LOG_LINK_INTERFACE(link),
1829 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1830 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 1831 link_enter_failed(link);
1832 return r;
1833 }
0ad6148e
MO		 1834 }
1835
d9c67ea1 1836 if (link->network->bridge) {
f2341e0a
LP		 1837 log_struct(LOG_DEBUG,
1838 LOG_LINK_INTERFACE(link),
1839 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1840 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 1841
34bf3c00
YW		 1842 link->enslaving++;
1843
f2341e0a 1844 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 1845 if (r < 0) {
f2341e0a
LP		 1846 log_struct_errno(LOG_WARNING, r,
1847 LOG_LINK_INTERFACE(link),
1848 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1849 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 1850 link_enter_failed(link);
1851 return r;
1852 }
52433f6b
TG		 1853 }
1854
6cb955c6
AR		 1855 if (link->network->vrf) {
1856 log_struct(LOG_DEBUG,
1857 LOG_LINK_INTERFACE(link),
1858 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 1859 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
1860
34bf3c00
YW		 1861 link->enslaving++;
1862
6cb955c6
AR		 1863 r = netdev_join(link->network->vrf, link, netdev_join_handler);
1864 if (r < 0) {
1865 log_struct_errno(LOG_WARNING, r,
1866 LOG_LINK_INTERFACE(link),
1867 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 1868 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 1869 link_enter_failed(link);
1870 return r;
1871 }
6cb955c6
AR		 1872 }
1873
90e74a66 1874 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7951dea2 1875
2b6db913
YW		 1876 if (netdev->ifindex > 0)
1877 /* Assume already enslaved. */
a63e5daa 1878 continue;
a63e5daa 1879
7033af49
YW		 1880 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
1881 continue;
1882
f2341e0a
LP		 1883 log_struct(LOG_DEBUG,
1884 LOG_LINK_INTERFACE(link),
1885 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 1886 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 1887
34bf3c00
YW		 1888 link->enslaving++;
1889
f2341e0a 1890 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 1891 if (r < 0) {
f2341e0a
LP		 1892 log_struct_errno(LOG_WARNING, r,
1893 LOG_LINK_INTERFACE(link),
1894 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 1895 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 1896 link_enter_failed(link);
1897 return r;
1898 }
326cb406
SS		 1899 }
1900
34bf3c00
YW		 1901 if (link->enslaving == 0)
1902 return link_joined(link);
1903
ef1ba606
TG		 1904 return 0;
1905}
1906
5e5b137a 1907static int link_drop_foreign_config(Link *link) {
5e5b137a
TG		 1908 int r;
1909
f8f2f880
YW		 1910 r = link_drop_foreign_addresses(link);
1911 if (r < 0)
1912 return r;
5e5b137a 1913
59048336
YW		 1914 r = link_drop_foreign_neighbors(link);
1915 if (r < 0)
1916 return r;
d1bdafd2 1917
779804dd 1918 return link_drop_foreign_routes(link);
5e5b137a
TG		 1919}
1920
3104883d 1921static int link_drop_config(Link *link) {
3104883d
SS		 1922 int r;
1923
d7fbb9f5
YW		 1924 r = link_drop_addresses(link);
1925 if (r < 0)
1926 return r;
3104883d 1927
59048336
YW		 1928 r = link_drop_neighbors(link);
1929 if (r < 0)
1930 return r;
d1bdafd2 1931
62f0ea5f
YW		 1932 r = link_drop_routes(link);
1933 if (r < 0)
1934 return r;
3104883d 1935
c69305ff
LP		 1936 ndisc_flush(link);
1937
3104883d
SS		 1938 return 0;
1939}
1940
256c75fd 1941int link_configure(Link *link) {
4ecdcb07
YW		 1942 int r;
1943
ef1ba606 1944 assert(link);
b22d8a00 1945 assert(link->network);
bd08ce56 1946 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 1947
34658df2 1948 r = link_configure_traffic_control(link);
4ecdcb07
YW		 1949 if (r < 0)
1950 return r;
1951
518cd6b5
SS		 1952 r = link_configure_sr_iov(link);
1953 if (r < 0)
1954 return r;
1955
500b96eb 1956 if (link->iftype == ARPHRD_CAN)
93ea7750 1957 return link_configure_can(link);
92c918b0 1958
5e0534f1 1959 r = link_set_sysctl(link);
b69c3180
SS		 1960 if (r < 0)
1961 return r;
8749cbcd 1962
5e0534f1 1963 r = link_set_ipv6_proxy_ndp_addresses(link);
94d76d07
YW		 1964 if (r < 0)
1965 return r;
1966
99d2baa2
SS		 1967 r = link_set_flags(link);
1968 if (r < 0)
1969 return r;
1970
89fe6535
SS		 1971 r = link_set_group(link);
1972 if (r < 0)
1973 return r;
1974
2ffd6d73
YW		 1975 r = ipv4ll_configure(link);
1976 if (r < 0)
1977 return r;
64b21ece 1978
2ffd6d73
YW		 1979 r = dhcp4_configure(link);
1980 if (r < 0)
1981 return r;
eb34d4af 1982
2ffd6d73
YW		 1983 r = dhcp6_configure(link);
1984 if (r < 0)
1985 return r;
f5a8c43f 1986
2ffd6d73
YW		 1987 r = ndisc_configure(link);
1988 if (r < 0)
1989 return r;
4138fb2c 1990
086b8853
YW		 1991 r = radv_configure(link);
1992 if (r < 0)
1993 return r;
7465dd22 1994
2ffd6d73
YW		 1995 r = link_lldp_rx_configure(link);
1996 if (r < 0)
1997 return r;
ce43e484 1998
f6fcc1c2 1999 r = link_configure_mtu(link);
40288ece
YW		 2000 if (r < 0)
2001 return r;
44b598a1 2002
9f6e82e6
YW		 2003 r = link_configure_addrgen_mode(link);
2004 if (r < 0)
2005 return r;
0e2fdb83 2006
3a390124
DS		 2007 return link_configure_continue(link);
2008}
2009
2010/* The configuration continues in this separate function, instead of
2011 * including this in the above link_configure() function, for two
2012 * reasons:
2013 * 1) some devices reset the link when the mtu is set, which caused
2014 * an infinite loop here in networkd; see:
2015 * https://github.com/systemd/systemd/issues/6593
2016 * https://github.com/systemd/systemd/issues/9831
2017 * 2) if ipv6ll is disabled, then bringing the interface up must be
2018 * delayed until after we get confirmation from the kernel that
2019 * the addr_gen_mode parameter has been set (via netlink), see:
2020 * https://github.com/systemd/systemd/issues/13882
2021 */
2022static int link_configure_continue(Link *link) {
55dc8c4a
YW		 2023 int r;
2024
2025 assert(link);
2026 assert(link->network);
bd08ce56 2027 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a 2028
9524014e 2029 if (link->setting_mtu || link->setting_genmode)
55dc8c4a
YW		 2030 return 0;
2031
4c649652
DS		 2032 /* Drop foreign config, but ignore loopback or critical devices.
2033 * We do not want to remove loopback address or addresses used for root NFS. */
2034 if (!(link->flags & IFF_LOOPBACK) &&
2035 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
2036 r = link_drop_foreign_config(link);
2037 if (r < 0)
2038 return r;
2039 }
2040
d236718c
DS		 2041 /* The kernel resets ipv6 mtu after changing device mtu;
2042 * we must set this here, after we've set device mtu */
2043 r = link_set_ipv6_mtu(link);
2044 if (r < 0)
5e0534f1 2045 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface, ignoring: %m");
d236718c 2046
3f265037 2047 return link_enter_join_netdev(link);
505f8da7
TG		 2048}
2049
572b21d9 2050static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
ad932b15
YW		 2051 Network *network;
2052 int r;
2053
572b21d9
YW		 2054 if (m) {
2055 _cleanup_strv_free_ char **s = NULL;
2056
2057 r = sd_netlink_message_get_errno(m);
2058 if (r < 0)
2059 return r;
2060
2061 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2062 if (r < 0 && r != -ENODATA)
2063 return r;
2064
2065 strv_free_and_replace(link->alternative_names, s);
2066 }
2067
c643bda5
YW		 2068 r = network_get(link->manager, link->iftype, link->sd_device,
2069 link->ifname, link->alternative_names, link->driver,
2070 &link->mac, &link->permanent_mac,
2071 link->wlan_iftype, link->ssid, &link->bssid, &network);
ad932b15
YW		 2072 if (r == -ENOENT) {
2073 link_enter_unmanaged(link);
2074 return 0;
2075 } else if (r == 0 && network->unmanaged) {
2076 link_enter_unmanaged(link);
2077 return 0;
2078 } else if (r < 0)
2079 return r;
2080
99b8517c 2081 if (link->network == network && !force)
ad932b15
YW		 2082 return 0;
2083
2084 log_link_info(link, "Re-configuring with %s", network->filename);
2085
2086 /* Dropping old .network file */
2a99eed0 2087 r = link_stop_engines(link, false);
572b21d9 2088 if (r < 0)
ad932b15 2089 return r;
ad932b15 2090
ad932b15
YW		 2091 r = link_drop_config(link);
2092 if (r < 0)
2093 return r;
2094
2c7b826d 2095 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
ad932b15
YW		 2096 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
2097 r = link_drop_foreign_config(link);
2098 if (r < 0)
2099 return r;
2100 }
2101
2102 link_free_carrier_maps(link);
2103 link_free_engines(link);
2104 link->network = network_unref(link->network);
2105
2106 /* Then, apply new .network file */
2107 r = network_apply(network, link);
2108 if (r < 0)
2109 return r;
2110
2111 r = link_new_carrier_maps(link);
2112 if (r < 0)
2113 return r;
2114
2115 link_set_state(link, LINK_STATE_INITIALIZED);
8ae7b8a1 2116 link_dirty(link);
ad932b15
YW		 2117
2118 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2119 * link_configure() is called later asynchronously. */
2120 r = link_configure_duid(link);
2121 if (r <= 0)
2122 return r;
2123
2124 r = link_configure(link);
2125 if (r < 0)
2126 return r;
2127
2128 return 0;
2129}
2130
572b21d9
YW		 2131static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2132 int r;
2133
2134 r = link_reconfigure_internal(link, m, false);
2135 if (r < 0)
2136 link_enter_failed(link);
2137
2138 return 1;
2139}
2140
2141static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2142 int r;
2143
2144 r = link_reconfigure_internal(link, m, true);
2145 if (r < 0)
2146 link_enter_failed(link);
2147
2148 return 1;
2149}
2150
2151int link_reconfigure(Link *link, bool force) {
2152 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2153 int r;
2154
2c0d7ed3
YW		 2155 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
2156 return 0;
2157
572b21d9
YW		 2158 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2159 link->ifindex);
2160 if (r < 0)
2161 return r;
2162
2163 r = netlink_call_async(link->manager->rtnl, NULL, req,
2164 force ? link_force_reconfigure_handler : link_reconfigure_handler,
2165 link_netlink_destroy_callback, link);
2166 if (r < 0)
2167 return r;
2168
2169 link_ref(link);
2170
2171 return 0;
2172}
2173
e6bf7774 2174static int link_initialized_and_synced(Link *link) {
505f8da7 2175 Network *network;
505f8da7
TG		 2176 int r;
2177
2178 assert(link);
2179 assert(link->ifname);
2180 assert(link->manager);
2181
bd08ce56
YW		 2182 /* We may get called either from the asynchronous netlink callback,
2183 * or directly for link_add() if running in a container. See link_add(). */
2184 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2185 return 0;
505f8da7 2186
6a7a4e4d 2187 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2188 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2189
0d4ad91d
AR		 2190 r = link_new_bound_by_list(link);
2191 if (r < 0)
2192 return r;
2193
2194 r = link_handle_bound_by_list(link);
2195 if (r < 0)
2196 return r;
2197
c4a03a56 2198 if (!link->network) {
0894cfe4 2199 r = wifi_get_info(link);
8d968fdd
YW		 2200 if (r < 0)
2201 return r;
2202
c643bda5
YW		 2203 r = network_get(link->manager, link->iftype, link->sd_device,
2204 link->ifname, link->alternative_names, link->driver,
2205 &link->mac, &link->permanent_mac,
2206 link->wlan_iftype, link->ssid, &link->bssid, &network);
c4a03a56
TG		 2207 if (r == -ENOENT) {
2208 link_enter_unmanaged(link);
4232cf04 2209 return 0;
a09dc546
DM		 2210 } else if (r == 0 && network->unmanaged) {
2211 link_enter_unmanaged(link);
2212 return 0;
c4a03a56
TG		 2213 } else if (r < 0)
2214 return r;
505f8da7 2215
c4a03a56
TG		 2216 if (link->flags & IFF_LOOPBACK) {
2217 if (network->link_local != ADDRESS_FAMILY_NO)
2218 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2219
c4a03a56
TG		 2220 if (network->dhcp != ADDRESS_FAMILY_NO)
2221 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2222
c4a03a56
TG		 2223 if (network->dhcp_server)
2224 log_link_debug(link, "Ignoring DHCP server for loopback link");
2225 }
bd2efe92 2226
7d342c03 2227 r = network_apply(network, link);
c4a03a56
TG		 2228 if (r < 0)
2229 return r;
2230 }
505f8da7 2231
0d4ad91d
AR		 2232 r = link_new_bound_to_list(link);
2233 if (r < 0)
2234 return r;
2235
27dfc982
YW		 2236 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2237 * link_configure() is called later asynchronously. */
2238 r = link_configure_duid(link);
2239 if (r <= 0)
2240 return r;
2241
a748b692
TG		 2242 r = link_configure(link);
2243 if (r < 0)
2244 return r;
2245
4232cf04 2246 return 0;
505f8da7
TG		 2247}
2248
302a796f 2249static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
572b21d9 2250 _cleanup_strv_free_ char **s = NULL;
4ff296b0
YW		 2251 int r;
2252
572b21d9
YW		 2253 r = sd_netlink_message_get_errno(m);
2254 if (r < 0) {
40681e5c 2255 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 2256 link_enter_failed(link);
2257 return 0;
2258 }
2259
2260 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2261 if (r < 0 && r != -ENODATA) {
2262 link_enter_failed(link);
2263 return 0;
2264 }
2265
2266 strv_free_and_replace(link->alternative_names, s);
2267
4ff296b0
YW		 2268 r = link_initialized_and_synced(link);
2269 if (r < 0)
2270 link_enter_failed(link);
e6bf7774
YW		 2271 return 1;
2272}
2273
51517f9e 2274int link_initialized(Link *link, sd_device *device) {
4afd3348 2275 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2276 int r;
2277
2278 assert(link);
2279 assert(link->manager);
2280 assert(link->manager->rtnl);
2281 assert(device);
2282
8434fd5c 2283 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2284 return 0;
2285
51517f9e 2286 if (link->sd_device)
679b3605
TG		 2287 return 0;
2288
79008bdd 2289 log_link_debug(link, "udev initialized link");
bd08ce56 2290 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 2291
51517f9e 2292 link->sd_device = sd_device_ref(device);
4f561e8e 2293
3c9b8860
TG		 2294 /* udev has initialized the link, but we don't know if we have yet
2295 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2296 * when it returns we know that the pending NEWLINKs have already been
2297 * processed and that we are up-to-date */
4f561e8e 2298
3c9b8860
TG		 2299 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2300 link->ifindex);
4f561e8e
TG		 2301 if (r < 0)
2302 return r;
2303
302a796f
YW		 2304 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
2305 link_netlink_destroy_callback, link);
4f561e8e
TG		 2306 if (r < 0)
2307 return r;
2308
5da8149f
TG		 2309 link_ref(link);
2310
4f561e8e
TG		 2311 return 0;
2312}
2313
c4a03a56 2314static int link_load(Link *link) {
0bc70f1d
TG		 2315 _cleanup_free_ char *network_file = NULL,
2316 *addresses = NULL,
f703cc2c 2317 *routes = NULL,
0bc70f1d
TG		 2318 *dhcp4_address = NULL,
2319 *ipv4ll_address = NULL;
c4a03a56
TG		 2320 int r;
2321
2322 assert(link);
2323
aa8fbc74 2324 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 2325 "NETWORK_FILE", &network_file,
2326 "ADDRESSES", &addresses,
f703cc2c 2327 "ROUTES", &routes,
0bc70f1d 2328 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 2329 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 2330 if (r < 0 && r != -ENOENT)
2331 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
2332
2333 if (network_file) {
2334 Network *network;
2335 char *suffix;
2336
2337 /* drop suffix */
2338 suffix = strrchr(network_file, '.');
2339 if (!suffix) {
2340 log_link_debug(link, "Failed to get network name from %s", network_file);
2341 goto network_file_fail;
2342 }
2343 *suffix = '\0';
2344
2345 r = network_get_by_name(link->manager, basename(network_file), &network);
2346 if (r < 0) {
2347 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
2348 goto network_file_fail;
2349 }
2350
7d342c03 2351 r = network_apply(network, link);
c4a03a56
TG		 2352 if (r < 0)
2353 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
2354 }
2355
2356network_file_fail:
2357
da4d3a61
YW		 2358 r = link_deserialize_addresses(link, addresses);
2359 if (r < 0)
2360 log_link_warning_errno(link, r, "Failed to load addresses from %s, ignoring: %m", link->state_file);
74544b4e 2361
731ff05b
YW		 2362 r = link_deserialize_routes(link, routes);
2363 if (r < 0)
2364 log_link_warning_errno(link, r, "Failed to load routes from %s, ignoring: %m", link->state_file);
f703cc2c 2365
571eeba9
YW		 2366 r = link_deserialize_dhcp4(link, dhcp4_address);
2367 if (r < 0)
2368 log_link_warning_errno(link, r, "Failed to load DHCPv4 address from %s, ignoring: %m", link->state_file);
0bc70f1d 2369
daad60d1
YW		 2370 r = link_deserialize_ipv4ll(link, ipv4ll_address);
2371 if (r < 0)
2372 log_link_warning_errno(link, r, "Failed to load IPv4LL address from %s, ignoring: %m", link->state_file);
0bc70f1d 2373
c4a03a56
TG		 2374 return 0;
2375}
2376
1c4baffc 2377int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 2378 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 2379 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 2380 Link *link;
5a937ea2 2381 int r;
505f8da7
TG		 2382
2383 assert(m);
fbbeb65a 2384 assert(m->rtnl);
505f8da7
TG		 2385 assert(message);
2386 assert(ret);
2387
2388 r = link_new(m, message, ret);
2389 if (r < 0)
2390 return r;
2391
2392 link = *ret;
2393
6a7a4e4d 2394 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 2395
c4a03a56
TG		 2396 r = link_load(link);
2397 if (r < 0)
2398 return r;
2399
bf331d87
YW		 2400 if (path_is_read_only_fs("/sys") <= 0) {
2401 /* udev should be around */
ae06ab10 2402 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 2403 r = sd_device_new_from_device_id(&device, ifindex_str);
2404 if (r < 0) {
4d59e14f
YW		 2405 log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m");
2406 return 0;
5c416fc4 2407 }
505f8da7 2408
5a937ea2 2409 r = sd_device_get_is_initialized(device);
51517f9e 2410 if (r < 0) {
bf331d87 2411 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 2412 goto failed;
2413 }
5a937ea2 2414 if (r == 0) {
505f8da7 2415 /* not yet ready */
79008bdd 2416 log_link_debug(link, "link pending udev initialization...");
505f8da7 2417 return 0;
3c4cb064 2418 }
505f8da7 2419
299ad32d
YW		 2420 r = device_is_renaming(device);
2421 if (r < 0) {
bf331d87 2422 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 2423 goto failed;
2424 }
2425 if (r > 0) {
bf331d87 2426 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 2427 return 0;
2428 }
2429
4f561e8e
TG		 2430 r = link_initialized(link, device);
2431 if (r < 0)
5c416fc4 2432 goto failed;
4f561e8e 2433 } else {
e6bf7774 2434 r = link_initialized_and_synced(link);
4f561e8e 2435 if (r < 0)
5c416fc4 2436 goto failed;
4f561e8e 2437 }
505f8da7 2438
a748b692 2439 return 0;
5c416fc4
TG		 2440failed:
2441 link_enter_failed(link);
2442 return r;
a748b692
TG		 2443}
2444
c601ebf7 2445int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 2446 int r;
2447
2448 assert(link);
2449
2450 log_link_info(link, "Gained IPv6LL");
2451
c601ebf7 2452 link->ipv6ll_address = *address;
e7ab854c
TG		 2453 link_check_ready(link);
2454
b9ea3d2e 2455 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 2456 r = link_acquire_ipv6_conf(link);
2457 if (r < 0) {
2458 link_enter_failed(link);
2459 return r;
2460 }
2461 }
2462
2463 return 0;
2464}
2465
9c0a72f9
TG		 2466static int link_carrier_gained(Link *link) {
2467 int r;
2468
2469 assert(link);
2470
0894cfe4 2471 r = wifi_get_info(link);
8d968fdd
YW		 2472 if (r < 0)
2473 return r;
2474 if (r > 0) {
572b21d9
YW		 2475 r = link_reconfigure_internal(link, NULL, false);
2476 if (r < 0) {
2477 link_enter_failed(link);
8d968fdd 2478 return r;
572b21d9 2479 }
8d968fdd
YW		 2480 }
2481
b9ea3d2e 2482 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 2483 r = link_acquire_conf(link);
2484 if (r < 0) {
2485 link_enter_failed(link);
2486 return r;
2487 }
6fc25497 2488
b425c3ae 2489 link_set_state(link, LINK_STATE_CONFIGURING);
682c65b0 2490 r = link_set_static_configs(link);
6fc25497
SS		 2491 if (r < 0)
2492 return r;
9c0a72f9
TG		 2493 }
2494
0d4ad91d
AR		 2495 r = link_handle_bound_by_list(link);
2496 if (r < 0)
2497 return r;
2498
1f241589
YW		 2499 if (!link->bridge_mdb_configured) {
2500 r = link_set_bridge_mdb(link);
2501 if (r < 0)
2502 return r;
2503 }
2504
2505 if (streq_ptr(link->kind, "bridge")) {
2506 Link *slave;
2507
2508 SET_FOREACH(slave, link->slaves) {
2509 if (slave->bridge_mdb_configured)
2510 continue;
2511
2512 r = link_set_bridge_mdb(slave);
2513 if (r < 0)
2514 link_enter_failed(slave);
2515 }
2516 }
3db468ea 2517
9c0a72f9
TG		 2518 return 0;
2519}
2520
2521static int link_carrier_lost(Link *link) {
2522 int r;
2523
2524 assert(link);
2525
25e992ba 2526 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 2527 return 0;
2528
fbdb6605 2529 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 2530 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
2531 * configuration and stop the clients as well. */
97e7fb39
SS		 2532 if (link->setting_mtu)
2533 return 0;
2534
2a99eed0 2535 r = link_stop_engines(link, false);
9c0a72f9
TG		 2536 if (r < 0) {
2537 link_enter_failed(link);
2538 return r;
2539 }
2540
3104883d
SS		 2541 r = link_drop_config(link);
2542 if (r < 0)
2543 return r;
2544
2c7b826d 2545 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
f258e948 2546 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 2547 r = link_drop_foreign_config(link);
2548 if (r < 0)
2549 return r;
2550 }
3104883d 2551
0d4ad91d
AR		 2552 r = link_handle_bound_by_list(link);
2553 if (r < 0)
2554 return r;
2555
9c0a72f9
TG		 2556 return 0;
2557}
2558
2559int link_carrier_reset(Link *link) {
2560 int r;
2561
2562 assert(link);
2563
2564 if (link_has_carrier(link)) {
2565 r = link_carrier_lost(link);
2566 if (r < 0)
2567 return r;
2568
2569 r = link_carrier_gained(link);
2570 if (r < 0)
2571 return r;
2572
6a7a4e4d 2573 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 2574 }
2575
2576 return 0;
2577}
2578
d236718c
DS		 2579/* This is called every time an interface admin state changes to up;
2580 * specifically, when IFF_UP flag changes from unset to set */
2581static int link_admin_state_up(Link *link) {
2582 int r;
2583
2584 /* We set the ipv6 mtu after the device mtu, but the kernel resets
2585 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
2586 * ipv6_mtu_set prevents this from trying to set it too early before
2587 * the link->network has been setup; we only need to reset it
2588 * here if we've already set it during normal initialization. */
2589 if (link->ipv6_mtu_set) {
2590 r = link_set_ipv6_mtu(link);
2591 if (r < 0)
2592 return r;
2593 }
2594
2595 return 0;
2596}
2597
1c4baffc 2598int link_update(Link *link, sd_netlink_message *m) {
572b21d9 2599 _cleanup_strv_free_ char **s = NULL;
c49b33ac 2600 struct ether_addr mac;
ca4e095a 2601 const char *ifname;
afe7fd56 2602 uint32_t mtu;
d236718c 2603 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 2604 int old_master, r;
22936833 2605
dd3efc09 2606 assert(link);
b8941f74 2607 assert(link->ifname);
22936833
TG		 2608 assert(m);
2609
7619683b 2610 if (link->state == LINK_STATE_LINGER) {
5238e957 2611 log_link_info(link, "Link re-added");
289e6774 2612 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 2613
2614 r = link_new_carrier_maps(link);
2615 if (r < 0)
2616 return r;
7619683b
TG		 2617 }
2618
1c4baffc 2619 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 2620 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 2621 Manager *manager = link->manager;
b8941f74 2622
30de2b89 2623 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 2624
30de2b89
YW		 2625 link_drop(link);
2626 r = link_add(manager, m, &link);
2627 if (r < 0)
2628 return r;
b8941f74
TG		 2629 }
2630
572b21d9
YW		 2631 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2632 if (r >= 0)
2633 strv_free_and_replace(link->alternative_names, s);
2634
1c4baffc 2635 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 2636 if (r >= 0 && mtu > 0) {
2637 link->mtu = mtu;
4e964aa0 2638 if (link->original_mtu == 0) {
afe7fd56 2639 link->original_mtu = mtu;
6a7a4e4d 2640 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 2641 }
2642
2643 if (link->dhcp_client) {
3c9b8860
TG		 2644 r = sd_dhcp_client_set_mtu(link->dhcp_client,
2645 link->mtu);
fc95c359
YW		 2646 if (r < 0)
2647 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 2648 }
7465dd22
PF		 2649
2650 if (link->radv) {
2651 r = sd_radv_set_mtu(link->radv, link->mtu);
2652 if (r < 0)
2653 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
2654 }
9842de0d 2655 }
69629de9 2656
e9189a1f
TG		 2657 /* The kernel may broadcast NEWLINK messages without the MAC address
2658 set, simply ignore them. */
1c4baffc 2659 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
807667f7
YW		 2660 if (r >= 0 && memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN) != 0) {
2661
2662 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN);
2663
2664 log_link_debug(link, "Gained new MAC address: "
2665 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
2666 mac.ether_addr_octet[0],
2667 mac.ether_addr_octet[1],
2668 mac.ether_addr_octet[2],
2669 mac.ether_addr_octet[3],
2670 mac.ether_addr_octet[4],
2671 mac.ether_addr_octet[5]);
2672
a3adb4a6
YW		 2673 r = ipv4ll_update_mac(link);
2674 if (r < 0)
2675 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
807667f7 2676
d947f7f9
YW		 2677 r = dhcp4_update_mac(link);
2678 if (r < 0)
2679 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 2680
eebba6dc
YW		 2681 r = dhcp6_update_mac(link);
2682 if (r < 0)
2683 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
7465dd22 2684
be9363cc
YW		 2685 r = dhcp6_update_mac(link);
2686 if (r < 0)
2687 return log_link_warning_errno(link, r, "Could not update MAC address for Router Advertisement: %m");
807667f7
YW		 2688
2689 if (link->ndisc) {
2690 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
2691 if (r < 0)
2692 return log_link_warning_errno(link, r, "Could not update MAC for NDisc: %m");
2693 }
d93d655c
YW		 2694
2695 r = ipv4_dad_update_mac(link);
2696 if (r < 0)
2697 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m");
4f882b2a
TG		 2698 }
2699
bb262ef0
YW		 2700 old_master = link->master_ifindex;
2701 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
2702
d236718c 2703 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 2704 had_carrier = link_has_carrier(link);
2705
bb262ef0 2706 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 2707 if (r < 0)
2708 return r;
2709
d236718c
DS		 2710 if (!link_was_admin_up && (link->flags & IFF_UP)) {
2711 log_link_info(link, "Link UP");
2712
2713 r = link_admin_state_up(link);
2714 if (r < 0)
2715 return r;
2716 } else if (link_was_admin_up && !(link->flags & IFF_UP))
2717 log_link_info(link, "Link DOWN");
2718
273eec24
LP		 2719 r = link_update_lldp(link);
2720 if (r < 0)
2721 return r;
2722
a61bb41c
TG		 2723 carrier_gained = !had_carrier && link_has_carrier(link);
2724 carrier_lost = had_carrier && !link_has_carrier(link);
2725
2726 if (carrier_gained) {
6a7a4e4d 2727 log_link_info(link, "Gained carrier");
a61bb41c 2728
9c0a72f9
TG		 2729 r = link_carrier_gained(link);
2730 if (r < 0)
2731 return r;
a61bb41c 2732 } else if (carrier_lost) {
6a7a4e4d 2733 log_link_info(link, "Lost carrier");
a61bb41c 2734
9c0a72f9
TG		 2735 r = link_carrier_lost(link);
2736 if (r < 0)
a61bb41c 2737 return r;
a61bb41c
TG		 2738 }
2739
2740 return 0;
dd3efc09 2741}
fe8db0c5 2742
b295beea
LP		 2743static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
2744 bool space = false;
b295beea
LP		 2745 Link *link;
2746
2747 assert(f);
2748 assert(prefix);
2749
2750 if (hashmap_isempty(h))
2751 return;
2752
0d536673 2753 fputs(prefix, f);
90e74a66 2754 HASHMAP_FOREACH(link, h) {
b295beea 2755 if (space)
0d536673 2756 fputc(' ', f);
b295beea
LP		 2757
2758 fprintf(f, "%i", link->ifindex);
2759 space = true;
2760 }
2761
0d536673 2762 fputc('\n', f);
b295beea
LP		 2763}
2764
64581765 2765static void link_save_dns(Link *link, FILE *f, struct in_addr_full **dns, unsigned n_dns, bool *space) {
dddc8d1e 2766 for (unsigned j = 0; j < n_dns; j++) {
e77bd3fd 2767 const char *str;
15761549 2768
64581765
YW		 2769 if (dns[j]->ifindex != 0 && dns[j]->ifindex != link->ifindex)
2770 continue;
2771
e77bd3fd
YW		 2772 str = in_addr_full_to_string(dns[j]);
2773 if (!str)
15761549 2774 continue;
15761549
YW		 2775
2776 if (*space)
2777 fputc(' ', f);
e77bd3fd 2778 fputs(str, f);
15761549
YW		 2779 *space = true;
2780 }
2781}
2782
d5e172d2
ZJS		 2783static void serialize_addresses(
2784 FILE *f,
2785 const char *lvalue,
2786 bool *space,
2787 char **addresses,
2788 sd_dhcp_lease *lease,
2789 bool conditional,
ddb82ec2 2790 sd_dhcp_lease_server_type what,
d5e172d2
ZJS		 2791 sd_dhcp6_lease *lease6,
2792 bool conditional6,
2793 int (*lease6_get_addr)(sd_dhcp6_lease*, const struct in6_addr**),
2794 int (*lease6_get_fqdn)(sd_dhcp6_lease*, char ***)) {
2795 int r;
2796
2797 bool _space = false;
2798 if (!space)
2799 space = &_space;
2800
2801 if (lvalue)
2802 fprintf(f, "%s=", lvalue);
2803 fputstrv(f, addresses, NULL, space);
2804
2805 if (lease && conditional) {
2806 const struct in_addr *lease_addresses;
2807
2808 r = sd_dhcp_lease_get_servers(lease, what, &lease_addresses);
2809 if (r > 0)
d8bff5cc 2810 serialize_in_addrs(f, lease_addresses, r, space, in4_addr_is_non_local);
d5e172d2
ZJS		 2811 }
2812
2813 if (lease6 && conditional6 && lease6_get_addr) {
2814 const struct in6_addr *in6_addrs;
2815
2816 r = lease6_get_addr(lease6, &in6_addrs);
d8bff5cc
ZJS		 2817 if (r > 0)
2818 serialize_in6_addrs(f, in6_addrs, r, space);
d5e172d2
ZJS		 2819 }
2820
2821 if (lease6 && conditional6 && lease6_get_fqdn) {
2822 char **in6_hosts;
2823
2824 r = lease6_get_fqdn(lease6, &in6_hosts);
2825 if (r > 0)
2826 fputstrv(f, in6_hosts, NULL, space);
2827 }
2828
2829 if (lvalue)
2830 fputc('\n', f);
2831}
2832
fe8db0c5 2833int link_save(Link *link) {
d361b373 2834 const char *admin_state, *oper_state, *carrier_state, *address_state;
68a8723c 2835 _cleanup_free_ char *temp_path = NULL;
fe8db0c5
TG		 2836 _cleanup_fclose_ FILE *f = NULL;
2837 int r;
2838
2839 assert(link);
2840 assert(link->state_file);
68a8723c 2841 assert(link->lease_file);
bbf7c048
TG		 2842 assert(link->manager);
2843
370e9930 2844 if (link->state == LINK_STATE_LINGER) {
6990fb6b 2845 (void) unlink(link->state_file);
370e9930
TG		 2846 return 0;
2847 }
2848
34437b4f
LP		 2849 link_lldp_save(link);
2850
deb2e523
TG		 2851 admin_state = link_state_to_string(link->state);
2852 assert(admin_state);
2853
e375dcde
TG		 2854 oper_state = link_operstate_to_string(link->operstate);
2855 assert(oper_state);
deb2e523 2856
ac999bf0
YW		 2857 carrier_state = link_carrier_state_to_string(link->carrier_state);
2858 assert(carrier_state);
2859
2860 address_state = link_address_state_to_string(link->address_state);
2861 assert(address_state);
2862
fe8db0c5
TG		 2863 r = fopen_temporary(link->state_file, &f, &temp_path);
2864 if (r < 0)
6a7a4e4d 2865 goto fail;
fe8db0c5 2866
5512a963 2867 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 2868
2869 fprintf(f,
2870 "# This is private data. Do not parse.\n"
deb2e523 2871 "ADMIN_STATE=%s\n"
ac999bf0
YW		 2872 "OPER_STATE=%s\n"
2873 "CARRIER_STATE=%s\n"
2874 "ADDRESS_STATE=%s\n",
2875 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 2876
bcb7a07e 2877 if (link->network) {
fe0e16db
YW		 2878 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
2879 const char *dhcp_domainname = NULL, *p;
fe0e16db 2880 bool space;
07bdc70d 2881
c1a38904
MTL		 2882 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
2883 yes_no(link->network->required_for_online));
2884
d5e172d2
ZJS		 2885 LinkOperationalStateRange st = link->network->required_operstate_for_online;
2886 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s%s%s\n",
2887 strempty(link_operstate_to_string(st.min)),
2888 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? ":" : "",
2889 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? strempty(link_operstate_to_string(st.max)) : "");
4ac77d63 2890
adc5b2e2
TG		 2891 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
2892
d5e172d2
ZJS		 2893 /************************************************************/
2894
0d536673 2895 fputs("DNS=", f);
ea352b40 2896 space = false;
15761549 2897 if (link->n_dns != (unsigned) -1)
64581765 2898 link_save_dns(link, f, link->dns, link->n_dns, &space);
15761549 2899 else
64581765 2900 link_save_dns(link, f, link->network->dns, link->network->n_dns, &space);
d5314fff 2901
d5e172d2
ZJS		 2902 serialize_addresses(f, NULL, &space,
2903 NULL,
2904 link->dhcp_lease,
2905 link->network->dhcp_use_dns,
ddb82ec2 2906 SD_DHCP_LEASE_DNS,
1633c457 2907 link->dhcp6_lease,
d5e172d2
ZJS		 2908 link->network->dhcp6_use_dns,
2909 sd_dhcp6_lease_get_dns,
2910 NULL);
1e7a0e21 2911
a8c10331 2912 /* Make sure to flush out old entries before we use the NDisc data */
1e7a0e21
LP		 2913 ndisc_vacuum(link);
2914
b296797f 2915 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 2916 NDiscRDNSS *dd;
2917
90e74a66 2918 SET_FOREACH(dd, link->ndisc_rdnss)
d8bff5cc 2919 serialize_in6_addrs(f, &dd->address, 1, &space);
299d578f
SS		 2920 }
2921
2922 fputc('\n', f);
2923
d5e172d2
ZJS		 2924 /************************************************************/
2925
2926 serialize_addresses(f, "NTP", NULL,
2927 link->ntp ?: link->network->ntp,
2928 link->dhcp_lease,
2929 link->network->dhcp_use_ntp,
ddb82ec2 2930 SD_DHCP_LEASE_NTP,
1633c457 2931 link->dhcp6_lease,
d5e172d2
ZJS		 2932 link->network->dhcp6_use_ntp,
2933 sd_dhcp6_lease_get_ntp_addrs,
2934 sd_dhcp6_lease_get_ntp_fqdn);
2935
2936 serialize_addresses(f, "SIP", NULL,
2a71d57f 2937 NULL,
d5e172d2
ZJS		 2938 link->dhcp_lease,
2939 link->network->dhcp_use_sip,
ddb82ec2 2940 SD_DHCP_LEASE_SIP,
2a71d57f 2941 NULL, false, NULL, NULL);
d5e172d2
ZJS		 2942
2943 /************************************************************/
bd8f6538 2944
b2a81c0b 2945 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 2946 if (link->dhcp_lease) {
b2a81c0b 2947 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 2948 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
2949 }
1633c457
YW		 2950 if (link->dhcp6_lease)
2951 (void) sd_dhcp6_lease_get_domains(link->dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 2952 }
2953
fe0e16db
YW		 2954 fputs("DOMAINS=", f);
2955 space = false;
90e74a66 2956 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains)
fe0e16db 2957 fputs_with_space(f, p, NULL, &space);
07bdc70d 2958
1e7a0e21 2959 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP		 2960 if (dhcp_domainname)
2961 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 2962 if (dhcp_domains)
2963 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 2964 if (dhcp6_domains)
2965 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 2966 }
2967
2968 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
2969 NDiscDNSSL *dd;
1e7a0e21 2970
90e74a66 2971 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 2972 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
2973 }
b2a81c0b 2974
0d536673 2975 fputc('\n', f);
6192b846 2976
d5e172d2
ZJS		 2977 /************************************************************/
2978
fe0e16db
YW		 2979 fputs("ROUTE_DOMAINS=", f);
2980 space = false;
90e74a66 2981 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains)
fe0e16db 2982 fputs_with_space(f, p, NULL, &space);
b2a81c0b 2983
1e7a0e21 2984 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
1e7a0e21
LP		 2985 if (dhcp_domainname)
2986 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 2987 if (dhcp_domains)
2988 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 2989 if (dhcp6_domains)
2990 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 2991 }
2992
2993 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
2994 NDiscDNSSL *dd;
1e7a0e21 2995
90e74a66 2996 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 2997 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
2998 }
b2a81c0b 2999
0d536673 3000 fputc('\n', f);
67272d15 3001
d5e172d2
ZJS		 3002 /************************************************************/
3003
3c9b8860 3004 fprintf(f, "LLMNR=%s\n",
15761549 3005 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
d5e172d2
ZJS		 3006
3007 /************************************************************/
3008
aaa297d4 3009 fprintf(f, "MDNS=%s\n",
15761549 3010 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
15761549 3011
d5e172d2
ZJS		 3012 /************************************************************/
3013
3014 int dns_default_route =
3015 link->dns_default_route >= 0 ? link->dns_default_route :
3016 link->network->dns_default_route;
3017 if (dns_default_route >= 0)
3018 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(dns_default_route));
3019
3020 /************************************************************/
3021
3022 DnsOverTlsMode dns_over_tls_mode =
3023 link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID ? link->dns_over_tls_mode :
3024 link->network->dns_over_tls_mode;
3025 if (dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3026 fprintf(f, "DNS_OVER_TLS=%s\n", dns_over_tls_mode_to_string(dns_over_tls_mode));
3027
3028 /************************************************************/
3029
3030 DnssecMode dnssec_mode =
3031 link->dnssec_mode != _DNSSEC_MODE_INVALID ? link->dnssec_mode :
3032 link->network->dnssec_mode;
3033 if (dnssec_mode != _DNSSEC_MODE_INVALID)
3034 fprintf(f, "DNSSEC=%s\n", dnssec_mode_to_string(dnssec_mode));
3035
3036 /************************************************************/
3037
3038 Set *nta_anchors = link->dnssec_negative_trust_anchors;
3039 if (set_isempty(nta_anchors))
3040 nta_anchors = link->network->dnssec_negative_trust_anchors;
3041
3042 if (!set_isempty(nta_anchors)) {
8a516214
LP		 3043 const char *n;
3044
0d536673 3045 fputs("DNSSEC_NTA=", f);
8a516214 3046 space = false;
90e74a66 3047 SET_FOREACH(n, nta_anchors)
d390f8ef 3048 fputs_with_space(f, n, NULL, &space);
0d536673 3049 fputc('\n', f);
8a516214
LP		 3050 }
3051
d5e172d2
ZJS		 3052 /************************************************************/
3053
3b31e2b7
YW		 3054 r = link_serialize_addresses(link, f);
3055 if (r < 0)
3056 goto fail;
c1eb9872 3057
d5e172d2
ZJS		 3058 /************************************************************/
3059
56519412
YW		 3060 r = link_serialize_routes(link, f);
3061 if (r < 0)
3062 goto fail;
bcb7a07e 3063 }
7374f9d8 3064
b295beea
LP		 3065 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3066 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3067
8eb9058d 3068 if (link->dhcp_lease) {
bd91b83e 3069 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3070 if (r < 0)
c2d6bd61 3071 goto fail;
fe8db0c5 3072
7374f9d8 3073 fprintf(f,
b0e39c82
TG		 3074 "DHCP_LEASE=%s\n",
3075 link->lease_file);
deb2e523 3076 } else
6990fb6b 3077 (void) unlink(link->lease_file);
fe8db0c5 3078
ca21a19a
YW		 3079 r = link_serialize_ipv4ll(link, f);
3080 if (r < 0)
3081 goto fail;
0bc70f1d 3082
5460bde5
YW		 3083 r = link_serialize_dhcp6_client(link, f);
3084 if (r < 0)
3085 goto fail;
18d8a2cf 3086
c2d6bd61
LP		 3087 r = fflush_and_check(f);
3088 if (r < 0)
3089 goto fail;
fe8db0c5 3090
c2d6bd61 3091 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3092 r = -errno;
c2d6bd61 3093 goto fail;
fe8db0c5
TG		 3094 }
3095
c2d6bd61 3096 return 0;
dacd6cee 3097
c2d6bd61 3098fail:
6a7a4e4d 3099 (void) unlink(link->state_file);
6a7a4e4d
LP		 3100 if (temp_path)
3101 (void) unlink(temp_path);
3102
dacd6cee 3103 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3104}
3105
84de38c5
TG		 3106/* The serialized state in /run is no longer up-to-date. */
3107void link_dirty(Link *link) {
3108 int r;
3109
3110 assert(link);
3111
0c241a37
SS		 3112 /* mark manager dirty as link is dirty */
3113 manager_dirty(link->manager);
3114
de7fef4b 3115 r = set_ensure_put(&link->manager->dirty_links, NULL, link);
0c241a37 3116 if (r <= 0)
de7fef4b 3117 /* Ignore allocation errors and don't take another ref if the link was already dirty */
84de38c5 3118 return;
84de38c5
TG		 3119 link_ref(link);
3120}
3121
3122/* The serialized state in /run is up-to-date */
3123void link_clean(Link *link) {
3124 assert(link);
3125 assert(link->manager);
3126
1046bf9b 3127 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 3128}
3129
c2a65950
YW		 3130int link_save_and_clean(Link *link) {
3131 int r;
3132
3133 r = link_save(link);
3134 if (r < 0)
3135 return r;
3136
3137 link_clean(link);
3138 return 0;
3139}
3140
fe8db0c5 3141static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3142 [LINK_STATE_PENDING] = "pending",
bd08ce56 3143 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 3144 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 3145 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3146 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3147 [LINK_STATE_FAILED] = "failed",
370e9930 3148 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3149};
3150
3151DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
5ecb131d
YW		 3152
3153int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg) {
3154 const char *err_msg = NULL;
3155
3156 (void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg);
d157714b
YW		 3157 return log_link_full_errno(link, level, err,
3158 "%s: %s%s%s%m",
3159 msg,
3160 strempty(err_msg),
3161 err_msg && !endswith(err_msg, ".") ? "." : "",
3162 err_msg ? " " : "");
5ecb131d 3163}
Unnamed repository; edit this file 'description' to name the repository.