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resolved: don't discard mDNS queries with bad flags
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
db9ecf05 1/* SPDX-License-Identifier: LGPL-2.1-or-later */
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"
af664001 19#include "fs-util.h"
737f1405 20#include "ipvlan.h"
ef118d00 21#include "missing_network.h"
cf1d700d 22#include "netlink-util.h"
c6f7c917 23#include "network-internal.h"
fb486c90 24#include "networkd-address-label.h"
093e3533 25#include "networkd-address.h"
3ddcbeea 26#include "networkd-can.h"
8fcf1d61 27#include "networkd-dhcp-server.h"
ca5ad760
YW		 28#include "networkd-dhcp4.h"
29#include "networkd-dhcp6.h"
ee446d57 30#include "networkd-fdb.h"
ca5ad760 31#include "networkd-ipv4ll.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
3ca1fab7 58bool link_ipv4ll_enabled(Link *link) {
b9d74c40
LP		 59 assert(link);
60
78c958f8
TG		 61 if (link->flags & IFF_LOOPBACK)
62 return false;
63
64 if (!link->network)
65 return false;
66
500b96eb 67 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 68 return false;
69
98d20a17 70 if (STRPTR_IN_SET(link->kind,
71 "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
b0486c73 72 "vti6", "nlmon", "xfrm", "bareudp"))
a8f5bba6
JD		 73 return false;
74
f410d463
YW		 75 /* L3 or L3S mode do not support ARP. */
76 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
77 return false;
78
f2bfcdb9
YW		 79 if (link->network->bond)
80 return false;
81
3ca1fab7 82 return link->network->link_local & ADDRESS_FAMILY_IPV4;
8bc17bb3
SS		 83}
84
f8f2f880 85bool link_ipv6ll_enabled(Link *link) {
b9d74c40
LP		 86 assert(link);
87
fa709992
LP		 88 if (!socket_ipv6_is_supported())
89 return false;
90
d0d6a4cd
TG		 91 if (link->flags & IFF_LOOPBACK)
92 return false;
93
94 if (!link->network)
95 return false;
96
500b96eb 97 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 98 return false;
99
100 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon"))
a8f5bba6
JD		 101 return false;
102
f2bfcdb9
YW		 103 if (link->network->bond)
104 return false;
105
e0ee46f2 106 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 107}
108
5e0534f1 109bool link_ipv6_enabled(Link *link) {
439689c6
SS		 110 assert(link);
111
112 if (!socket_ipv6_is_supported())
113 return false;
114
b102cdca 115 if (link->network->bond)
2b00a4e0
TY		 116 return false;
117
500b96eb 118 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 119 return false;
120
4cef7fe3 121 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
adfeee49
YW		 122 if (link_ipv6ll_enabled(link))
123 return true;
124
125 if (network_has_static_ipv6_configurations(link->network))
126 return true;
127
128 return false;
439689c6
SS		 129}
130
34bf3c00
YW		 131static bool link_is_enslaved(Link *link) {
132 if (link->flags & IFF_SLAVE)
133 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
134 return true;
135
34bf3c00
YW		 136 if (!link->network)
137 return false;
138
bb262ef0 139 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 140 return true;
141
bb262ef0
YW		 142 /* TODO: add conditions for other netdevs. */
143
34bf3c00
YW		 144 return false;
145}
146
45e11abf
YW		 147static void link_update_master_operstate(Link *link, NetDev *netdev) {
148 Link *master;
149
150 if (!netdev)
151 return;
152
7936917e
YW		 153 if (netdev->ifindex <= 0)
154 return;
155
45e11abf
YW		 156 if (link_get(link->manager, netdev->ifindex, &master) < 0)
157 return;
158
159 link_update_operstate(master, true);
160}
161
162void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 163 LinkOperationalState operstate;
1678fbb3
YW		 164 LinkCarrierState carrier_state;
165 LinkAddressState address_state;
35c5a9ca 166 _cleanup_strv_free_ char **p = NULL;
1678fbb3 167 uint8_t scope = RT_SCOPE_NOWHERE;
35c5a9ca 168 bool changed = false;
1678fbb3 169 Address *address;
14153d1b 170
84de38c5
TG		 171 assert(link);
172
173 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 174 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 175 else if (link_has_carrier(link)) {
1678fbb3
YW		 176 if (link_is_enslaved(link))
177 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 178 else
1678fbb3 179 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 180 } else if (link->flags & IFF_UP)
1678fbb3 181 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 182 else
1678fbb3 183 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 184
1678fbb3 185 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 186 Link *slave;
187
90e74a66 188 SET_FOREACH(slave, link->slaves) {
959f65d3 189 link_update_operstate(slave, false);
84de38c5 190
1678fbb3
YW		 191 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
192 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 193 }
959f65d3 194 }
84de38c5 195
90e74a66 196 SET_FOREACH(address, link->addresses) {
1678fbb3
YW		 197 if (!address_is_ready(address))
198 continue;
84de38c5 199
1678fbb3
YW		 200 if (address->scope < scope)
201 scope = address->scope;
202 }
84de38c5 203
1678fbb3 204 /* for operstate we also take foreign addresses into account */
90e74a66 205 SET_FOREACH(address, link->addresses_foreign) {
1678fbb3
YW		 206 if (!address_is_ready(address))
207 continue;
208
209 if (address->scope < scope)
210 scope = address->scope;
211 }
212
213 if (scope < RT_SCOPE_SITE)
214 /* universally accessible addresses found */
215 address_state = LINK_ADDRESS_STATE_ROUTABLE;
216 else if (scope < RT_SCOPE_HOST)
217 /* only link or site local addresses found */
218 address_state = LINK_ADDRESS_STATE_DEGRADED;
84de38c5 219 else
1678fbb3
YW		 220 /* no useful addresses found */
221 address_state = LINK_ADDRESS_STATE_OFF;
222
223 /* Mapping of address and carrier state vs operational state
224 * carrier state
225 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
226 * ------------------------------------------------------------------------------
227 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
228 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
229 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
230 */
84de38c5 231
1678fbb3
YW		 232 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
233 operstate = (LinkOperationalState) carrier_state;
234 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
235 operstate = LINK_OPERSTATE_ROUTABLE;
236 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
237 operstate = LINK_OPERSTATE_DEGRADED;
238 else
14153d1b
YW		 239 operstate = LINK_OPERSTATE_ENSLAVED;
240
35c5a9ca
YW		 241 if (link->carrier_state != carrier_state) {
242 link->carrier_state = carrier_state;
243 changed = true;
244 if (strv_extend(&p, "CarrierState") < 0)
245 log_oom();
246 }
959f65d3 247
35c5a9ca
YW		 248 if (link->address_state != address_state) {
249 link->address_state = address_state;
250 changed = true;
251 if (strv_extend(&p, "AddressState") < 0)
252 log_oom();
959f65d3
YW		 253 }
254
84de38c5
TG		 255 if (link->operstate != operstate) {
256 link->operstate = operstate;
35c5a9ca
YW		 257 changed = true;
258 if (strv_extend(&p, "OperationalState") < 0)
259 log_oom();
84de38c5 260 }
959f65d3 261
35c5a9ca
YW		 262 if (p)
263 link_send_changed_strv(link, p);
264 if (changed)
265 link_dirty(link);
266
45e11abf
YW		 267 if (also_update_master && link->network) {
268 link_update_master_operstate(link, link->network->bond);
269 link_update_master_operstate(link, link->network->bridge);
959f65d3 270 }
84de38c5
TG		 271}
272
51d18171
TG		 273#define FLAG_STRING(string, flag, old, new) \
274 (((old ^ new) & flag) \
275 ? ((old & flag) ? (" -" string) : (" +" string)) \
276 : "")
277
bb262ef0 278static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 279 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
280 uint8_t operstate;
281 int r;
282
283 assert(link);
284
285 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 286 if (r < 0)
287 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 288
1c4baffc 289 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 290 if (r < 0)
291 /* if we got a message without operstate, take it to mean
292 the state was unchanged */
293 operstate = link->kernel_operstate;
294
bb262ef0 295 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 296 return 0;
297
298 if (link->flags != flags) {
6a7a4e4d 299 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		 300 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
301 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
302 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
303 FLAG_STRING("UP", IFF_UP, link->flags, flags),
304 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
305 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
306 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
307 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
308 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
309 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
310 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
311 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
312 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
313 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
314 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
315 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
316 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
317 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
318 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
319
320 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
321 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
322 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
323 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
324 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
325 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
326 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
327 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
328
329 /* link flags are currently at most 18 bits, let's align to
330 * printing 20 */
331 if (unknown_flags_added)
79008bdd 332 log_link_debug(link,
6a7a4e4d 333 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 334 unknown_flags_added);
335
336 if (unknown_flags_removed)
79008bdd 337 log_link_debug(link,
6a7a4e4d 338 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 339 unknown_flags_removed);
340 }
341
342 link->flags = flags;
343 link->kernel_operstate = operstate;
344
959f65d3 345 link_update_operstate(link, true);
51d18171
TG		 346
347 return 0;
348}
349
1c4baffc 350static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 351 _cleanup_(link_unrefp) Link *link = NULL;
6cad256d 352 const char *ifname, *kind = NULL;
b710e6b6 353 unsigned short iftype;
572b21d9
YW		 354 int r, ifindex;
355 uint16_t type;
f579559b 356
0c2f9b84 357 assert(manager);
505f8da7 358 assert(message);
f579559b
TG		 359 assert(ret);
360
6cad256d
TJ		 361 /* check for link kind */
362 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
363 if (r == 0) {
db2f8a2e 364 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 365 r = sd_netlink_message_exit_container(message);
366 if (r < 0)
367 return r;
368 }
369
1c4baffc 370 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 371 if (r < 0)
372 return r;
373 else if (type != RTM_NEWLINK)
374 return -EINVAL;
375
376 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
377 if (r < 0)
378 return r;
379 else if (ifindex <= 0)
380 return -EINVAL;
381
b710e6b6
LP		 382 r = sd_rtnl_message_link_get_type(message, &iftype);
383 if (r < 0)
384 return r;
385
1c4baffc 386 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 387 if (r < 0)
388 return r;
389
17f9c355 390 link = new(Link, 1);
f579559b
TG		 391 if (!link)
392 return -ENOMEM;
393
17f9c355
YW		 394 *link = (Link) {
395 .n_ref = 1,
396 .manager = manager,
397 .state = LINK_STATE_PENDING,
17f9c355
YW		 398 .ifindex = ifindex,
399 .iftype = iftype,
15761549
YW		 400
401 .n_dns = (unsigned) -1,
402 .dns_default_route = -1,
403 .llmnr = _RESOLVE_SUPPORT_INVALID,
404 .mdns = _RESOLVE_SUPPORT_INVALID,
405 .dnssec_mode = _DNSSEC_MODE_INVALID,
406 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
17f9c355
YW		 407 };
408
505f8da7
TG		 409 link->ifname = strdup(ifname);
410 if (!link->ifname)
411 return -ENOMEM;
f579559b 412
6cad256d
TJ		 413 if (kind) {
414 link->kind = strdup(kind);
415 if (!link->kind)
416 return -ENOMEM;
417 }
418
cbff7170
TJ		 419 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
420 if (r < 0)
421 log_link_debug_errno(link, r, "New device has no master, continuing without");
422
b8162cd2 423 r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, &link->hw_addr);
512922f8 424 if (r < 0)
b8162cd2 425 log_link_debug_errno(link, r, "Hardware address not found for new device, continuing without");
512922f8 426
14b66dbc
TR		 427 r = netlink_message_read_hw_addr(message, IFLA_BROADCAST, &link->bcast_addr);
428 if (r < 0)
429 log_link_debug_errno(link, r, "Broadcast address not found for new device, continuing without");
430
c643bda5 431 r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac);
4bb7cc82
YW		 432 if (r < 0)
433 log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
434
c643bda5
YW		 435 r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver);
436 if (r < 0)
437 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
438
572b21d9
YW		 439 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &link->alternative_names);
440 if (r < 0 && r != -ENODATA)
441 return r;
442
34437b4f 443 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 444 return -ENOMEM;
fe8db0c5 445
34437b4f 446 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 447 return -ENOMEM;
448
34437b4f 449 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 450 return -ENOMEM;
451
967d72ed 452 r = hashmap_ensure_put(&manager->links, NULL, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 453 if (r < 0)
454 return r;
455
bb262ef0 456 r = link_update_flags(link, message, false);
51d18171
TG		 457 if (r < 0)
458 return r;
459
1cc6c93a 460 *ret = TAKE_PTR(link);
f579559b
TG		 461
462 return 0;
463}
464
15761549
YW		 465void link_ntp_settings_clear(Link *link) {
466 link->ntp = strv_free(link->ntp);
467}
468
469void link_dns_settings_clear(Link *link) {
e77bd3fd
YW		 470 if (link->n_dns != (unsigned) -1)
471 for (unsigned i = 0; i < link->n_dns; i++)
472 in_addr_full_free(link->dns[i]);
15761549
YW		 473 link->dns = mfree(link->dns);
474 link->n_dns = (unsigned) -1;
475
476 link->search_domains = ordered_set_free_free(link->search_domains);
477 link->route_domains = ordered_set_free_free(link->route_domains);
478
479 link->dns_default_route = -1;
480 link->llmnr = _RESOLVE_SUPPORT_INVALID;
481 link->mdns = _RESOLVE_SUPPORT_INVALID;
482 link->dnssec_mode = _DNSSEC_MODE_INVALID;
483 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
484
485 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
486}
487
1a6bb31f
YW		 488static void link_free_engines(Link *link) {
489 if (!link)
490 return;
491
492 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
493 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
494 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
1c494872 495 link->dhcp_acd = sd_ipv4acd_unref(link->dhcp_acd);
1a6bb31f
YW		 496
497 link->lldp = sd_lldp_unref(link->lldp);
1c494872 498 link_lldp_emit_stop(link);
1a6bb31f
YW		 499
500 ndisc_flush(link);
501
502 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
503 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 504 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
1a6bb31f
YW		 505 link->ndisc = sd_ndisc_unref(link->ndisc);
506 link->radv = sd_radv_unref(link->radv);
7abe175c
YW		 507
508 ipv4_dad_unref(link);
1a6bb31f
YW		 509}
510
8301aa0b 511static Link *link_free(Link *link) {
8301aa0b 512 assert(link);
f579559b 513
15761549
YW		 514 link_ntp_settings_clear(link);
515 link_dns_settings_clear(link);
516
8eec0b9d
YW		 517 link->routes = set_free(link->routes);
518 link->routes_foreign = set_free(link->routes_foreign);
6e537f62
YW		 519 link->dhcp_routes = set_free(link->dhcp_routes);
520 link->dhcp_routes_old = set_free(link->dhcp_routes_old);
1633c457
YW		 521 link->dhcp6_routes = set_free(link->dhcp6_routes);
522 link->dhcp6_routes_old = set_free(link->dhcp6_routes_old);
523 link->dhcp6_pd_routes = set_free(link->dhcp6_pd_routes);
524 link->dhcp6_pd_routes_old = set_free(link->dhcp6_pd_routes_old);
69203fba 525 link->ndisc_routes = set_free(link->ndisc_routes);
adda1ed9 526
8eec0b9d
YW		 527 link->nexthops = set_free(link->nexthops);
528 link->nexthops_foreign = set_free(link->nexthops_foreign);
c16c7808 529
8eec0b9d
YW		 530 link->neighbors = set_free(link->neighbors);
531 link->neighbors_foreign = set_free(link->neighbors_foreign);
d1bdafd2 532
8eec0b9d
YW		 533 link->addresses = set_free(link->addresses);
534 link->addresses_foreign = set_free(link->addresses_foreign);
aa651e88 535 link->pool_addresses = set_free(link->pool_addresses);
e5526518 536 link->static_addresses = set_free(link->static_addresses);
1633c457
YW		 537 link->dhcp6_addresses = set_free(link->dhcp6_addresses);
538 link->dhcp6_addresses_old = set_free(link->dhcp6_addresses_old);
539 link->dhcp6_pd_addresses = set_free(link->dhcp6_pd_addresses);
540 link->dhcp6_pd_addresses_old = set_free(link->dhcp6_pd_addresses_old);
69203fba 541 link->ndisc_addresses = set_free(link->ndisc_addresses);
adda1ed9 542
1a6bb31f 543 link_free_engines(link);
68a8723c 544 free(link->lease_file);
49699bac
SS		 545 free(link->lldp_file);
546
c166a070 547 free(link->ifname);
572b21d9 548 strv_free(link->alternative_names);
ceac4078 549 free(link->kind);
8d968fdd 550 free(link->ssid);
c643bda5 551 free(link->driver);
6cad256d 552
db2f8a2e 553 (void) unlink(link->state_file);
fe8db0c5 554 free(link->state_file);
c166a070 555
51517f9e 556 sd_device_unref(link->sd_device);
b5db00e5 557
0d4ad91d 558 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 559 hashmap_free(link->bound_by_links);
560
5f707e12 561 set_free_with_destructor(link->slaves, link_unref);
033295c1 562
c9c908a6
YW		 563 network_unref(link->network);
564
8301aa0b 565 return mfree(link);
14b746f7
TG		 566}
567
8301aa0b 568DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 569
11a7f229
TG		 570int link_get(Manager *m, int ifindex, Link **ret) {
571 Link *link;
11a7f229
TG		 572
573 assert(m);
e856ed00 574 assert(ifindex > 0);
11a7f229
TG		 575 assert(ret);
576
ae06ab10 577 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 578 if (!link)
579 return -ENODEV;
580
581 *ret = link;
582
583 return 0;
584}
585
af9ba57a 586void link_set_state(Link *link, LinkState state) {
e331e246
TG		 587 assert(link);
588
589 if (link->state == state)
590 return;
591
0beb9542
YW		 592 log_link_debug(link, "State changed: %s -> %s",
593 link_state_to_string(link->state),
594 link_state_to_string(state));
595
e331e246
TG		 596 link->state = state;
597
598 link_send_changed(link, "AdministrativeState", NULL);
9092113d 599 link_dirty(link);
e331e246
TG		 600}
601
57bd6899
TG		 602static void link_enter_unmanaged(Link *link) {
603 assert(link);
604
e331e246 605 link_set_state(link, LINK_STATE_UNMANAGED);
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
9cc65242
YW		 634 k = sd_lldp_stop(link->lldp);
635 if (k < 0)
636 r = log_link_warning_errno(link, k, "Could not stop LLDP: %m");
637
84add3cd
YW		 638 k = sd_ipv4ll_stop(link->ipv4ll);
639 if (k < 0)
640 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f 641
490ccbd5 642 k = ipv4_dad_stop(link);
2488e4d9
YW		 643 if (k < 0)
644 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
051e77ca 645
84add3cd
YW		 646 k = sd_dhcp6_client_stop(link->dhcp6_client);
647 if (k < 0)
648 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
4138fb2c 649
2ffd6d73
YW		 650 k = dhcp6_pd_remove(link);
651 if (k < 0)
652 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
1633c457 653
84add3cd
YW		 654 k = sd_ndisc_stop(link->ndisc);
655 if (k < 0)
656 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c 657
84add3cd
YW		 658 k = sd_radv_stop(link->radv);
659 if (k < 0)
660 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
7465dd22 661
7272b25e 662 link_lldp_emit_stop(link);
111bb8f9
TG		 663 return r;
664}
665
b22d8a00 666void link_enter_failed(Link *link) {
ef1ba606 667 assert(link);
f882c247 668
370e9930 669 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 670 return;
671
6a7a4e4d 672 log_link_warning(link, "Failed");
449f7554 673
e331e246 674 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 675
2a99eed0 676 (void) link_stop_engines(link, false);
f882c247
TG		 677}
678
7033af49
YW		 679static int link_join_netdevs_after_configured(Link *link) {
680 NetDev *netdev;
7033af49
YW		 681 int r;
682
90e74a66 683 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7033af49
YW		 684 if (netdev->ifindex > 0)
685 /* Assume already enslaved. */
686 continue;
687
688 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
689 continue;
690
691 log_struct(LOG_DEBUG,
692 LOG_LINK_INTERFACE(link),
693 LOG_NETDEV_INTERFACE(netdev),
694 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
695
696 r = netdev_join(netdev, link, NULL);
697 if (r < 0)
698 return log_struct_errno(LOG_WARNING, r,
699 LOG_LINK_INTERFACE(link),
700 LOG_NETDEV_INTERFACE(netdev),
701 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
702 }
703
704 return 0;
705}
706
e3a7b048 707static void link_enter_configured(Link *link) {
dd43110f
TG		 708 assert(link);
709 assert(link->network);
e3a7b048 710
289e6774 711 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 712 return;
dd43110f 713
e331e246 714 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 715
7033af49 716 (void) link_join_netdevs_after_configured(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
d19b9939
YW		 727 if (link->state != LINK_STATE_CONFIGURING)
728 return (void) log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31
DA		 729
730 if (!link->network)
731 return;
732
d19b9939
YW		 733 if (!link->addresses_configured)
734 return (void) log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 735
d19b9939
YW		 736 if (!link->neighbors_configured)
737 return (void) log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
6accfd31 738
90e74a66 739 SET_FOREACH(a, link->addresses)
39373cb9
YW		 740 if (!address_is_ready(a)) {
741 _cleanup_free_ char *str = NULL;
742
5380707a
YW		 743 (void) in_addr_prefix_to_string(a->family, &a->in_addr, a->prefixlen, &str);
744 return (void) log_link_debug(link, "%s(): an address %s is not ready.", __func__, strna(str));
39373cb9 745 }
6aa5773b 746
d19b9939
YW		 747 if (!link->static_routes_configured)
748 return (void) log_link_debug(link, "%s(): static routes are not configured.", __func__);
6accfd31 749
d19b9939
YW		 750 if (!link->static_nexthops_configured)
751 return (void) log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 752
d19b9939
YW		 753 if (!link->routing_policy_rules_configured)
754 return (void) log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 755
d19b9939
YW		 756 if (!link->tc_configured)
757 return (void) log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
4ecdcb07 758
d19b9939
YW		 759 if (!link->sr_iov_configured)
760 return (void) log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 761
d19b9939
YW		 762 if (!link->bridge_mdb_configured)
763 return (void) log_link_debug(link, "%s(): Bridge MDB is not configured.", __func__);
1f241589 764
463797c1 765 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
50550722
YW		 766 bool has_ndisc_address = false;
767 NDiscAddress *n;
6accfd31 768
94876904
YW		 769 if (link_ipv6ll_enabled(link) && !in6_addr_is_set(&link->ipv6ll_address))
770 return (void) log_link_debug(link, "%s(): IPv6LL is not configured yet.", __func__);
6accfd31 771
90e74a66 772 SET_FOREACH(n, link->ndisc_addresses)
50550722
YW		 773 if (!n->marked) {
774 has_ndisc_address = true;
775 break;
776 }
777
0d0799da 778 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_ipv4ll_enabled(link)) &&
50550722 779 !link->dhcp_address && set_isempty(link->dhcp6_addresses) && !has_ndisc_address &&
0d0799da
YW		 780 !link->ipv4ll_address_configured)
781 /* When DHCP[46] or IPv4LL is enabled, at least one address is acquired by them. */
782 return (void) log_link_debug(link, "%s(): DHCP4, DHCP6 or IPv4LL is enabled but no dynamic address is assigned yet.", __func__);
659ad3a0 783
0d0799da
YW		 784 if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_dhcp6_pd_is_enabled(link) ||
785 link_ipv6_accept_ra_enabled(link) || link_ipv4ll_enabled(link)) {
39373cb9
YW		 786 if (!link->dhcp4_configured &&
787 !(link->dhcp6_address_configured && link->dhcp6_route_configured) &&
788 !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) &&
d98c546d 789 !(link->ndisc_addresses_configured && link->ndisc_routes_configured) &&
0d0799da
YW		 790 !link->ipv4ll_address_configured)
791 /* When DHCP[46], NDisc, or IPv4LL is enabled, at least one protocol must be finished. */
d19b9939 792 return (void) log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
39373cb9 793
0d0799da 794 log_link_debug(link, "%s(): dhcp4:%s ipv4ll:%s dhcp6_addresses:%s dhcp_routes:%s dhcp_pd_addresses:%s dhcp_pd_routes:%s ndisc_addresses:%s ndisc_routes:%s",
39373cb9
YW		 795 __func__,
796 yes_no(link->dhcp4_configured),
0d0799da 797 yes_no(link->ipv4ll_address_configured),
39373cb9
YW		 798 yes_no(link->dhcp6_address_configured),
799 yes_no(link->dhcp6_route_configured),
800 yes_no(link->dhcp6_pd_address_configured),
801 yes_no(link->dhcp6_pd_route_configured),
d98c546d
YW		 802 yes_no(link->ndisc_addresses_configured),
803 yes_no(link->ndisc_routes_configured));
39373cb9 804 }
463797c1 805 }
6accfd31 806
5f58af25 807 link_enter_configured(link);
6accfd31
DA		 808}
809
682c65b0 810static int link_set_static_configs(Link *link) {
f882c247
TG		 811 int r;
812
813 assert(link);
814 assert(link->network);
f5be5601 815 assert(link->state != _LINK_STATE_INVALID);
f882c247 816
2428613f 817 /* Reset all *_configured flags we are configuring. */
9b966cee 818 link->request_static_addresses = false;
2428613f 819 link->addresses_configured = false;
6aa5773b 820 link->addresses_ready = false;
2428613f
YW		 821 link->neighbors_configured = false;
822 link->static_routes_configured = false;
c16c7808 823 link->static_nexthops_configured = false;
2428613f
YW		 824 link->routing_policy_rules_configured = false;
825
f6bb7ac5
TJ		 826 r = link_set_bridge_fdb(link);
827 if (r < 0)
828 return r;
829
1f241589
YW		 830 r = link_set_bridge_mdb(link);
831 if (r < 0)
832 return r;
833
58f1fe9a 834 r = link_set_neighbors(link);
f3ef324d
YW		 835 if (r < 0)
836 return r;
e4a71bf3 837
682c65b0
YW		 838 r = link_set_addresses(link);
839 if (r < 0)
840 return r;
bd6379ec 841
fe2bc17c
YW		 842 r = link_set_address_labels(link);
843 if (r < 0)
844 return r;
f882c247 845
e5526518 846 /* now that we can figure out a default address for the dhcp server, start it */
5ae0fb7f
YW		 847 r = dhcp4_server_configure(link);
848 if (r < 0)
849 return r;
d4cdbea5 850
f882c247
TG		 851 return 0;
852}
853
3a390124 854static int link_configure_continue(Link *link);
55dc8c4a 855
e16e4b3b
DS		 856static int link_mac_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
857 int r;
858
859 assert(link);
860
861 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
862 return 1;
863
864 r = sd_netlink_message_get_errno(m);
865 if (r < 0)
866 log_link_message_warning_errno(link, m, r, "Could not set MAC address, ignoring");
867 else
868 log_link_debug(link, "Setting MAC address done.");
869
870 return 1;
871}
872
873static int link_set_mac(Link *link) {
874 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
875 int r;
876
877 assert(link);
878 assert(link->network);
879 assert(link->manager);
880 assert(link->manager->rtnl);
881
882 if (!link->network->mac)
883 return 0;
884
885 log_link_debug(link, "Setting MAC address");
886
887 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
888 if (r < 0)
889 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
890
891 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
892 if (r < 0)
893 return log_link_error_errno(link, r, "Could not set MAC address: %m");
894
895 r = netlink_call_async(link->manager->rtnl, NULL, req, link_mac_handler,
896 link_netlink_destroy_callback, link);
897 if (r < 0)
898 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
899
900 link_ref(link);
901
902 return 0;
903}
904
905static int link_nomaster_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
906 int r;
907
908 assert(link);
909
910 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
911 return 1;
912
913 r = sd_netlink_message_get_errno(m);
914 if (r < 0)
915 log_link_message_warning_errno(link, m, r, "Could not set nomaster, ignoring");
916 else
917 log_link_debug(link, "Setting nomaster done.");
918
919 return 1;
920}
921
922static int link_set_nomaster(Link *link) {
923 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
924 int r;
925
926 assert(link);
927 assert(link->network);
928 assert(link->manager);
929 assert(link->manager->rtnl);
930
931 /* set it free if not enslaved with networkd */
932 if (link->network->bridge || link->network->bond || link->network->vrf)
933 return 0;
934
935 log_link_debug(link, "Setting nomaster");
936
937 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
938 if (r < 0)
939 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
940
941 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
942 if (r < 0)
943 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
944
945 r = netlink_call_async(link->manager->rtnl, NULL, req, link_nomaster_handler,
946 link_netlink_destroy_callback, link);
947 if (r < 0)
948 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
949
950 link_ref(link);
951
952 return 0;
953}
954
302a796f 955static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 956 int r;
957
958 assert(m);
959 assert(link);
960 assert(link->ifname);
961
55dc8c4a
YW		 962 link->setting_mtu = false;
963
5da8149f 964 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 965 return 1;
966
1c4baffc 967 r = sd_netlink_message_get_errno(m);
4ff296b0 968 if (r < 0)
5ecb131d 969 log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring");
4ff296b0
YW		 970 else
971 log_link_debug(link, "Setting MTU done.");
55dc8c4a 972
4ff296b0 973 if (link->state == LINK_STATE_INITIALIZED) {
3a390124 974 r = link_configure_continue(link);
4ff296b0
YW		 975 if (r < 0)
976 link_enter_failed(link);
977 }
4f882b2a
TG		 978
979 return 1;
980}
981
933c70a0 982int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 983 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 984 int r;
985
986 assert(link);
987 assert(link->manager);
988 assert(link->manager->rtnl);
989
40288ece
YW		 990 if (mtu == 0 || link->setting_mtu)
991 return 0;
992
933c70a0 993 if (link->mtu == mtu)
ee493106
YW		 994 return 0;
995
6a7a4e4d 996 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 997
6a7a4e4d
LP		 998 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
999 if (r < 0)
1000 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1001
44b598a1 1002 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1003 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1004 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1005
1006 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
d236718c 1007 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes");
44b598a1 1008
72c2500b 1009 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1010 }
1011
1c4baffc 1012 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1013 if (r < 0)
1014 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1015
302a796f
YW		 1016 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1017 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1018 if (r < 0)
1019 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1020
ae941762 1021 link_ref(link);
1046bf9b 1022 link->setting_mtu = true;
b226d99b 1023
4f882b2a
TG		 1024 return 0;
1025}
1026
f6fcc1c2
YW		 1027static bool link_reduces_vlan_mtu(Link *link) {
1028 /* See netif_reduces_vlan_mtu() in kernel. */
1029 return streq_ptr(link->kind, "macsec");
1030}
1031
1032static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1033 uint32_t mtu = 0;
1034 NetDev *dev;
f6fcc1c2 1035
90e74a66 1036 HASHMAP_FOREACH(dev, link->network->stacked_netdevs)
f6fcc1c2
YW		 1037 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1038 /* See vlan_dev_change_mtu() in kernel. */
1039 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1040
1041 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1042 /* See macvlan_change_mtu() in kernel. */
1043 mtu = dev->mtu;
1044
1045 return mtu;
1046}
1047
1048static int link_configure_mtu(Link *link) {
1049 uint32_t mtu;
1050
1051 assert(link);
1052 assert(link->network);
1053
1054 if (link->network->mtu > 0)
1055 return link_set_mtu(link, link->network->mtu);
1056
1057 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1058 if (link->mtu >= mtu)
1059 return 0;
1060
1061 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1062 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1063 link->mtu, mtu);
1064
1065 return link_set_mtu(link, mtu);
1066}
1067
302a796f 1068static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1069 int r;
1070
1071 assert(m);
1072 assert(link);
1073 assert(link->ifname);
1074
1075 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1076 return 1;
1077
1078 r = sd_netlink_message_get_errno(m);
1079 if (r < 0)
5ecb131d 1080 log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring");
99d2baa2
SS		 1081
1082 return 1;
1083}
1084
1085static int link_set_flags(Link *link) {
1086 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1087 unsigned ifi_change = 0;
1088 unsigned ifi_flags = 0;
1089 int r;
1090
1091 assert(link);
1092 assert(link->manager);
1093 assert(link->manager->rtnl);
1094
1095 if (link->flags & IFF_LOOPBACK)
1096 return 0;
1097
1098 if (!link->network)
1099 return 0;
1100
937e305e
SS		 1101 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0 &&
1102 link->network->promiscuous < 0)
99d2baa2
SS		 1103 return 0;
1104
1105 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1106 if (r < 0)
1107 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1108
1109 if (link->network->arp >= 0) {
1110 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1111 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1112 }
1113
1114 if (link->network->multicast >= 0) {
1115 ifi_change |= IFF_MULTICAST;
1116 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1117 }
1118
866e6b7a
SS		 1119 if (link->network->allmulticast >= 0) {
1120 ifi_change |= IFF_ALLMULTI;
1121 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1122 }
1123
937e305e
SS		 1124 if (link->network->promiscuous >= 0) {
1125 ifi_change |= IFF_PROMISC;
1126 SET_FLAG(ifi_flags, IFF_PROMISC, link->network->promiscuous);
1127 }
1128
99d2baa2
SS		 1129 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1130 if (r < 0)
1131 return log_link_error_errno(link, r, "Could not set link flags: %m");
1132
302a796f
YW		 1133 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1134 link_netlink_destroy_callback, link);
99d2baa2
SS		 1135 if (r < 0)
1136 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1137
1138 link_ref(link);
1139
1140 return 0;
1141}
1142
e7ab854c
TG		 1143static int link_acquire_ipv6_conf(Link *link) {
1144 int r;
1145
1146 assert(link);
1147
2ffd6d73 1148 if (link->ndisc) {
e7ab854c
TG		 1149 log_link_debug(link, "Discovering IPv6 routers");
1150
1e7a0e21 1151 r = sd_ndisc_start(link->ndisc);
63348d13 1152 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1153 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1154 }
1155
086b8853 1156 if (link->radv) {
7465dd22 1157 assert(link->radv);
94876904 1158 assert(in6_addr_is_link_local(&link->ipv6ll_address));
7465dd22
PF		 1159
1160 log_link_debug(link, "Starting IPv6 Router Advertisements");
1161
fd3ef936
YW		 1162 r = radv_emit_dns(link);
1163 if (r < 0)
1164 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
1165
7465dd22
PF		 1166 r = sd_radv_start(link->radv);
1167 if (r < 0 && r != -EBUSY)
1168 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1169 }
1170
838d39af
SS		 1171 if (link_dhcp6_enabled(link) && IN_SET(link->network->dhcp6_without_ra,
1172 DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST,
1173 DHCP6_CLIENT_START_MODE_SOLICIT)) {
cd305af1 1174 assert(link->dhcp6_client);
94876904 1175 assert(in6_addr_is_link_local(&link->ipv6ll_address));
cd305af1 1176
838d39af 1177 r = dhcp6_request_address(link, link->network->dhcp6_without_ra == DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST);
cd305af1 1178 if (r < 0 && r != -EBUSY)
1633c457 1179 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
cd305af1
SS		 1180 else
1181 log_link_debug(link, "Acquiring DHCPv6 lease");
1182 }
1183
1633c457
YW		 1184 r = dhcp6_request_prefix_delegation(link);
1185 if (r < 0)
1186 return log_link_warning_errno(link, r, "Failed to request DHCPv6 prefix delegation: %m");
10752343 1187
e7ab854c
TG		 1188 return 0;
1189}
1190
6fc25497 1191static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1192 int r;
1193
1194 assert(link);
ff254138
TG		 1195 assert(link->manager);
1196 assert(link->manager->event);
1197
0107b769
ZJS		 1198 if (link->dhcp_client) {
1199 log_link_debug(link, "Acquiring DHCPv4 lease");
1200
1201 r = sd_dhcp_client_start(link->dhcp_client);
1202 if (r < 0)
1203 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
1204
0b4b66cc 1205 } else if (link->ipv4ll) {
6a7a4e4d 1206 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1207
1208 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1209 if (r < 0)
1210 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1211 }
1212
6fc25497
SS		 1213 return 0;
1214}
1215
1216static int link_acquire_conf(Link *link) {
1217 int r;
1218
1219 assert(link);
1220
1221 r = link_acquire_ipv4_conf(link);
1222 if (r < 0)
1223 return r;
1224
94876904 1225 if (in6_addr_is_set(&link->ipv6ll_address)) {
6fc25497
SS		 1226 r = link_acquire_ipv6_conf(link);
1227 if (r < 0)
1228 return r;
1229 }
1230
2ffd6d73
YW		 1231 r = link_lldp_emit_start(link);
1232 if (r < 0)
1233 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
8e1ad1ea 1234
ff254138
TG		 1235 return 0;
1236}
1237
a61bb41c 1238bool link_has_carrier(Link *link) {
deb2e523
TG		 1239 /* see Documentation/networking/operstates.txt in the kernel sources */
1240
a61bb41c 1241 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1242 return true;
1243
a61bb41c 1244 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1245 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1246 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1247 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1248 return true;
1249
1250 return false;
1251}
1252
0e2fdb83
SS		 1253static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1254 int r;
1255
1256 assert(link);
1257
9524014e
DS		 1258 link->setting_genmode = false;
1259
0e2fdb83
SS		 1260 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1261 return 1;
1262
1263 r = sd_netlink_message_get_errno(m);
1264 if (r < 0)
5ecb131d 1265 log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring");
9524014e
DS		 1266 else
1267 log_link_debug(link, "Setting address genmode done.");
1268
1269 if (link->state == LINK_STATE_INITIALIZED) {
1270 r = link_configure_continue(link);
1271 if (r < 0)
1272 link_enter_failed(link);
1273 }
0e2fdb83
SS		 1274
1275 return 1;
1276}
1277
1278static int link_configure_addrgen_mode(Link *link) {
1279 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1280 uint8_t ipv6ll_mode;
1281 int r;
1282
1283 assert(link);
1284 assert(link->network);
1285 assert(link->manager);
1286 assert(link->manager->rtnl);
1287
9524014e 1288 if (!socket_ipv6_is_supported() || link->setting_genmode)
9f6e82e6
YW		 1289 return 0;
1290
0e2fdb83
SS		 1291 log_link_debug(link, "Setting address genmode for link");
1292
1293 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1294 if (r < 0)
1295 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1296
1297 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1298 if (r < 0)
1299 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1300
1301 r = sd_netlink_message_open_container(req, AF_INET6);
1302 if (r < 0)
1303 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1304
1305 if (!link_ipv6ll_enabled(link))
1306 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
6f6296b9 1307 else if (link->network->ipv6ll_address_gen_mode < 0) {
a6f1848a
SS		 1308 r = sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL);
1309 if (r < 0) {
1310 /* The file may not exist. And even if it exists, when stable_secret is unset,
1311 * reading the file fails with EIO. */
1312 log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret: %m");
1313
1314 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1315 } else
1316 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1317 } else
6f6296b9 1318 ipv6ll_mode = link->network->ipv6ll_address_gen_mode;
0e2fdb83
SS		 1319
1320 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1321 if (r < 0)
1322 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1323
1324 r = sd_netlink_message_close_container(req);
1325 if (r < 0)
1326 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1327
1328 r = sd_netlink_message_close_container(req);
1329 if (r < 0)
1330 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1331
1332 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1333 link_netlink_destroy_callback, link);
1334 if (r < 0)
1335 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1336
1337 link_ref(link);
9524014e 1338 link->setting_genmode = true;
0e2fdb83
SS		 1339
1340 return 0;
1341}
1342
302a796f 1343static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1344 int r;
1345
1746cf2a
TG		 1346 assert(link);
1347
5da8149f 1348 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1349 return 1;
1350
1c4baffc 1351 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1352 if (r < 0)
26d6b214 1353 /* we warn but don't fail the link, as it may be brought up later */
5ecb131d 1354 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
45ad2c13 1355
f882c247
TG		 1356 return 1;
1357}
1358
1cc84f3b 1359static int link_up(Link *link) {
4afd3348 1360 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1361 int r;
1362
f882c247 1363 assert(link);
c106cc36 1364 assert(link->network);
f882c247
TG		 1365 assert(link->manager);
1366 assert(link->manager->rtnl);
1367
6a7a4e4d 1368 log_link_debug(link, "Bringing link up");
449f7554 1369
6a7a4e4d
LP		 1370 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1371 if (r < 0)
1372 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1373
5d4795f3 1374 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1375 if (r < 0)
1376 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1377
302a796f
YW		 1378 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1379 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1380 if (r < 0)
1381 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1382
b226d99b
TG		 1383 link_ref(link);
1384
f882c247
TG		 1385 return 0;
1386}
1387
302a796f 1388static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1389 int r;
1390
1391 assert(link);
1392
1393 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1394 return 1;
1395
1c4baffc 1396 r = sd_netlink_message_get_errno(m);
0d4ad91d 1397 if (r < 0)
5ecb131d 1398 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
0d4ad91d
AR		 1399
1400 return 1;
1401}
1402
8e54db83 1403int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1404 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1405 int r;
1406
1407 assert(link);
1408 assert(link->manager);
1409 assert(link->manager->rtnl);
1410
6a7a4e4d 1411 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1412
1413 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1414 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1415 if (r < 0)
1416 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1417
1418 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1419 if (r < 0)
1420 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1421
8e54db83
YW		 1422 r = netlink_call_async(link->manager->rtnl, NULL, req,
1423 callback ?: link_down_handler,
302a796f 1424 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1425 if (r < 0)
1426 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1427
1428 link_ref(link);
1429
1430 return 0;
1431}
1432
89fe6535
SS		 1433static int link_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1434 int r;
1435
1436 assert(link);
1437
1438 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1439 return 1;
1440
1441 r = sd_netlink_message_get_errno(m);
1442 if (r < 0)
1443 log_link_message_warning_errno(link, m, r, "Could not set group for the interface");
1444
1445 return 1;
1446}
1447
1448static int link_set_group(Link *link) {
1449 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1450 int r;
1451
1452 assert(link);
1453 assert(link->network);
1454 assert(link->manager);
1455 assert(link->manager->rtnl);
1456
1457 if (link->network->group <= 0)
1458 return 0;
1459
1460 log_link_debug(link, "Setting group");
1461
1462 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1463 if (r < 0)
1464 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1465
1466 r = sd_netlink_message_append_u32(req, IFLA_GROUP, link->network->group);
1467 if (r < 0)
1468 return log_link_error_errno(link, r, "Could not set link group: %m");
1469
1470 r = netlink_call_async(link->manager->rtnl, NULL, req, link_group_handler,
1471 link_netlink_destroy_callback, link);
1472 if (r < 0)
1473 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1474
1475 link_ref(link);
1476
1477 return 0;
1478}
1479
0d4ad91d
AR		 1480static int link_handle_bound_to_list(Link *link) {
1481 Link *l;
0d4ad91d
AR		 1482 int r;
1483 bool required_up = false;
1484 bool link_is_up = false;
1485
1486 assert(link);
1487
1488 if (hashmap_isempty(link->bound_to_links))
1489 return 0;
1490
1491 if (link->flags & IFF_UP)
1492 link_is_up = true;
1493
90e74a66 1494 HASHMAP_FOREACH (l, link->bound_to_links)
0d4ad91d
AR		 1495 if (link_has_carrier(l)) {
1496 required_up = true;
1497 break;
1498 }
1499
1500 if (!required_up && link_is_up) {
8e54db83 1501 r = link_down(link, NULL);
0d4ad91d
AR		 1502 if (r < 0)
1503 return r;
1504 } else if (required_up && !link_is_up) {
1505 r = link_up(link);
1506 if (r < 0)
1507 return r;
1508 }
1509
1510 return 0;
1511}
1512
1513static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 1514 Link *l;
1515 int r;
1516
1517 assert(link);
1518
1519 if (hashmap_isempty(link->bound_by_links))
1520 return 0;
1521
90e74a66 1522 HASHMAP_FOREACH (l, link->bound_by_links) {
0d4ad91d
AR		 1523 r = link_handle_bound_to_list(l);
1524 if (r < 0)
1525 return r;
1526 }
1527
1528 return 0;
1529}
1530
1531static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1532 int r;
1533
1534 assert(link);
1535 assert(carrier);
1536
1537 if (link == carrier)
1538 return 0;
1539
1540 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1541 return 0;
1542
190b3b5c 1543 r = hashmap_ensure_put(h, NULL, INT_TO_PTR(carrier->ifindex), carrier);
0d4ad91d
AR		 1544 if (r < 0)
1545 return r;
1546
9092113d
YW		 1547 link_dirty(link);
1548
0d4ad91d
AR		 1549 return 0;
1550}
1551
1552static int link_new_bound_by_list(Link *link) {
1553 Manager *m;
1554 Link *carrier;
0d4ad91d 1555 int r;
0d4ad91d
AR		 1556
1557 assert(link);
1558 assert(link->manager);
1559
1560 m = link->manager;
1561
90e74a66 1562 HASHMAP_FOREACH(carrier, m->links) {
0d4ad91d
AR		 1563 if (!carrier->network)
1564 continue;
1565
1566 if (strv_isempty(carrier->network->bind_carrier))
1567 continue;
1568
191a3f16 1569 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 1570 r = link_put_carrier(link, carrier, &link->bound_by_links);
1571 if (r < 0)
1572 return r;
0d4ad91d
AR		 1573 }
1574 }
1575
90e74a66 1576 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 1577 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1578 if (r < 0)
1579 return r;
0d4ad91d
AR		 1580 }
1581
1582 return 0;
1583}
1584
1585static int link_new_bound_to_list(Link *link) {
1586 Manager *m;
1587 Link *carrier;
0d4ad91d 1588 int r;
0d4ad91d
AR		 1589
1590 assert(link);
1591 assert(link->manager);
1592
1593 if (!link->network)
1594 return 0;
1595
1596 if (strv_isempty(link->network->bind_carrier))
1597 return 0;
1598
1599 m = link->manager;
1600
90e74a66 1601 HASHMAP_FOREACH (carrier, m->links) {
191a3f16 1602 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 1603 r = link_put_carrier(link, carrier, &link->bound_to_links);
1604 if (r < 0)
1605 return r;
0d4ad91d
AR		 1606 }
1607 }
1608
90e74a66 1609 HASHMAP_FOREACH (carrier, link->bound_to_links) {
0d4ad91d
AR		 1610 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1611 if (r < 0)
1612 return r;
0d4ad91d
AR		 1613 }
1614
1615 return 0;
1616}
1617
1618static int link_new_carrier_maps(Link *link) {
1619 int r;
1620
1621 r = link_new_bound_by_list(link);
1622 if (r < 0)
1623 return r;
1624
1625 r = link_handle_bound_by_list(link);
1626 if (r < 0)
1627 return r;
1628
1629 r = link_new_bound_to_list(link);
1630 if (r < 0)
1631 return r;
1632
1633 r = link_handle_bound_to_list(link);
1634 if (r < 0)
1635 return r;
1636
1637 return 0;
1638}
1639
1640static void link_free_bound_to_list(Link *link) {
9092113d 1641 bool updated = false;
0d4ad91d 1642 Link *bound_to;
0d4ad91d 1643
9092113d
YW		 1644 assert(link);
1645
1646 while ((bound_to = hashmap_steal_first(link->bound_to_links))) {
1647 updated = true;
0d4ad91d
AR		 1648
1649 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 1650 link_dirty(bound_to);
0d4ad91d
AR		 1651 }
1652
9092113d
YW		 1653 if (updated)
1654 link_dirty(link);
1655
0d4ad91d
AR		 1656 return;
1657}
1658
1659static void link_free_bound_by_list(Link *link) {
9092113d 1660 bool updated = false;
0d4ad91d 1661 Link *bound_by;
0d4ad91d 1662
9092113d
YW		 1663 assert(link);
1664
1665 while ((bound_by = hashmap_steal_first(link->bound_by_links))) {
1666 updated = true;
0d4ad91d
AR		 1667
1668 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 1669 link_dirty(bound_by);
0d4ad91d
AR		 1670 link_handle_bound_to_list(bound_by);
1671 }
1672 }
1673
9092113d
YW		 1674 if (updated)
1675 link_dirty(link);
1676
0d4ad91d
AR		 1677 return;
1678}
1679
1680static void link_free_carrier_maps(Link *link) {
0d4ad91d
AR		 1681 assert(link);
1682
9092113d
YW		 1683 link_free_bound_to_list(link);
1684 link_free_bound_by_list(link);
0d4ad91d
AR		 1685
1686 return;
1687}
1688
5f707e12
YW		 1689static int link_append_to_master(Link *link, NetDev *netdev) {
1690 Link *master;
1691 int r;
1692
1693 assert(link);
1694 assert(netdev);
1695
1696 r = link_get(link->manager, netdev->ifindex, &master);
1697 if (r < 0)
1698 return r;
1699
de7fef4b 1700 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 1701 if (r <= 0)
5f707e12
YW		 1702 return r;
1703
1704 link_ref(link);
1705 return 0;
1706}
1707
1708static void link_drop_from_master(Link *link, NetDev *netdev) {
1709 Link *master;
1710
1711 assert(link);
1712
1713 if (!link->manager || !netdev)
1714 return;
1715
1716 if (link_get(link->manager, netdev->ifindex, &master) < 0)
1717 return;
1718
1719 link_unref(set_remove(master->slaves, link));
1720}
1721
1722static void link_detach_from_manager(Link *link) {
1723 if (!link || !link->manager)
1724 return;
1725
1726 link_unref(set_remove(link->manager->links_requesting_uuid, link));
1727 link_clean(link);
1728
1729 /* The following must be called at last. */
1730 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
1731 link_unref(link);
1732}
1733
0d4ad91d
AR		 1734void link_drop(Link *link) {
1735 if (!link || link->state == LINK_STATE_LINGER)
1736 return;
1737
1738 link_set_state(link, LINK_STATE_LINGER);
1739
1740 link_free_carrier_maps(link);
1741
5f707e12
YW		 1742 if (link->network) {
1743 link_drop_from_master(link, link->network->bridge);
1744 link_drop_from_master(link, link->network->bond);
1745 }
1746
6a7a4e4d 1747 log_link_debug(link, "Link removed");
0d4ad91d 1748
db2f8a2e 1749 (void) unlink(link->state_file);
c4397d94 1750 link_detach_from_manager(link);
0d4ad91d
AR		 1751}
1752
3f265037 1753static int link_joined(Link *link) {
f882c247
TG		 1754 int r;
1755
ef1ba606 1756 assert(link);
f5be5601 1757 assert(link->network);
dd3efc09 1758
61135582
DS		 1759 switch (link->network->activation_policy) {
1760 case ACTIVATION_POLICY_BOUND:
0d4ad91d
AR		 1761 r = link_handle_bound_to_list(link);
1762 if (r < 0)
1763 return r;
61135582
DS		 1764 break;
1765 case ACTIVATION_POLICY_UP:
1766 if (link->activated)
1767 break;
1768 _fallthrough_;
1769 case ACTIVATION_POLICY_ALWAYS_UP:
505f8da7
TG		 1770 r = link_up(link);
1771 if (r < 0) {
1772 link_enter_failed(link);
1773 return r;
1774 }
61135582
DS		 1775 break;
1776 case ACTIVATION_POLICY_DOWN:
1777 if (link->activated)
1778 break;
1779 _fallthrough_;
1780 case ACTIVATION_POLICY_ALWAYS_DOWN:
1781 r = link_down(link, NULL);
1782 if (r < 0) {
1783 link_enter_failed(link);
1784 return r;
1785 }
1786 break;
1787 default:
1788 break;
ef1ba606 1789 }
61135582 1790 link->activated = true;
f882c247 1791
9ed794a3 1792 if (link->network->bridge) {
e1853b00 1793 r = link_set_bridge(link);
6a7a4e4d
LP		 1794 if (r < 0)
1795 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 1796
1797 r = link_append_to_master(link, link->network->bridge);
1798 if (r < 0)
1799 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 1800 }
1801
eb64b435 1802 if (link->network->bond) {
7fcee284 1803 r = link_set_bond(link);
eb64b435
SS		 1804 if (r < 0)
1805 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 1806
45e11abf 1807 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 1808 if (r < 0)
1809 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 1810 }
1811
34d7f2c9
YW		 1812 r = link_set_bridge_vlan(link);
1813 if (r < 0)
1814 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
13b498f9 1815
c1835a42
RM		 1816 /* Skip setting up addresses until it gets carrier,
1817 or it would try to set addresses twice,
1818 which is bad for non-idempotent steps. */
dad2d78e 1819 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 1820 return 0;
1821
b425c3ae 1822 link_set_state(link, LINK_STATE_CONFIGURING);
0e569a43
YW		 1823
1824 r = link_acquire_conf(link);
1825 if (r < 0)
1826 return r;
1827
682c65b0 1828 return link_set_static_configs(link);
02b59d57
TG		 1829}
1830
302a796f 1831static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 1832 int r;
1833
1746cf2a 1834 assert(link);
ef1ba606 1835 assert(link->network);
34bf3c00 1836 assert(link->enslaving > 0);
02b59d57 1837
313cefa1 1838 link->enslaving--;
52433f6b 1839
5da8149f 1840 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 1841 return 1;
1842
1c4baffc 1843 r = sd_netlink_message_get_errno(m);
856f962c 1844 if (r < 0 && r != -EEXIST) {
5ecb131d 1845 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG		 1846 link_enter_failed(link);
1847 return 1;
4ff296b0
YW		 1848 }
1849
1850 log_link_debug(link, "Joined netdev");
02b59d57 1851
34bf3c00 1852 if (link->enslaving == 0) {
4ff296b0
YW		 1853 r = link_joined(link);
1854 if (r < 0)
1855 link_enter_failed(link);
34bf3c00 1856 }
02b59d57
TG		 1857
1858 return 1;
1859}
1860
3f265037 1861static int link_enter_join_netdev(Link *link) {
6a0a2f86 1862 NetDev *netdev;
02b59d57
TG		 1863 int r;
1864
1865 assert(link);
1866 assert(link->network);
bd08ce56 1867 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 1868
289e6774 1869 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 1870
34bf3c00 1871 link->enslaving = 0;
02b59d57 1872
d9c67ea1 1873 if (link->network->bond) {
cbff7170
TJ		 1874 if (link->network->bond->state == NETDEV_STATE_READY &&
1875 link->network->bond->ifindex == link->master_ifindex)
1876 return link_joined(link);
1877
f2341e0a
LP		 1878 log_struct(LOG_DEBUG,
1879 LOG_LINK_INTERFACE(link),
1880 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1881 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 1882
34bf3c00
YW		 1883 link->enslaving++;
1884
f2341e0a 1885 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 1886 if (r < 0) {
f2341e0a
LP		 1887 log_struct_errno(LOG_WARNING, r,
1888 LOG_LINK_INTERFACE(link),
1889 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1890 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 1891 link_enter_failed(link);
1892 return r;
1893 }
0ad6148e
MO		 1894 }
1895
d9c67ea1 1896 if (link->network->bridge) {
f2341e0a
LP		 1897 log_struct(LOG_DEBUG,
1898 LOG_LINK_INTERFACE(link),
1899 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1900 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 1901
34bf3c00
YW		 1902 link->enslaving++;
1903
f2341e0a 1904 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 1905 if (r < 0) {
f2341e0a
LP		 1906 log_struct_errno(LOG_WARNING, r,
1907 LOG_LINK_INTERFACE(link),
1908 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1909 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 1910 link_enter_failed(link);
1911 return r;
1912 }
52433f6b
TG		 1913 }
1914
6cb955c6
AR		 1915 if (link->network->vrf) {
1916 log_struct(LOG_DEBUG,
1917 LOG_LINK_INTERFACE(link),
1918 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 1919 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
1920
34bf3c00
YW		 1921 link->enslaving++;
1922
6cb955c6
AR		 1923 r = netdev_join(link->network->vrf, link, netdev_join_handler);
1924 if (r < 0) {
1925 log_struct_errno(LOG_WARNING, r,
1926 LOG_LINK_INTERFACE(link),
1927 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 1928 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 1929 link_enter_failed(link);
1930 return r;
1931 }
6cb955c6
AR		 1932 }
1933
90e74a66 1934 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7951dea2 1935
2b6db913
YW		 1936 if (netdev->ifindex > 0)
1937 /* Assume already enslaved. */
a63e5daa 1938 continue;
a63e5daa 1939
7033af49
YW		 1940 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
1941 continue;
1942
f2341e0a
LP		 1943 log_struct(LOG_DEBUG,
1944 LOG_LINK_INTERFACE(link),
1945 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 1946 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 1947
34bf3c00
YW		 1948 link->enslaving++;
1949
f2341e0a 1950 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 1951 if (r < 0) {
f2341e0a
LP		 1952 log_struct_errno(LOG_WARNING, r,
1953 LOG_LINK_INTERFACE(link),
1954 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 1955 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 1956 link_enter_failed(link);
1957 return r;
1958 }
326cb406
SS		 1959 }
1960
34bf3c00
YW		 1961 if (link->enslaving == 0)
1962 return link_joined(link);
1963
ef1ba606
TG		 1964 return 0;
1965}
1966
5e5b137a 1967static int link_drop_foreign_config(Link *link) {
0b81225e
YW		 1968 int k, r;
1969
1970 assert(link);
1971 assert(link->manager);
5e5b137a 1972
f8f2f880 1973 r = link_drop_foreign_addresses(link);
5e5b137a 1974
0b81225e
YW		 1975 k = link_drop_foreign_neighbors(link);
1976 if (k < 0 && r >= 0)
1977 r = k;
1978
1979 k = link_drop_foreign_routes(link);
1980 if (k < 0 && r >= 0)
1981 r = k;
d1bdafd2 1982
25b82b6e
YW		 1983 k = link_drop_foreign_nexthops(link);
1984 if (k < 0 && r >= 0)
1985 r = k;
1986
0b81225e
YW		 1987 k = manager_drop_foreign_routing_policy_rules(link->manager);
1988 if (k < 0 && r >= 0)
1989 r = k;
1990
1991 return r;
5e5b137a
TG		 1992}
1993
3104883d 1994static int link_drop_config(Link *link) {
0b81225e
YW		 1995 int k, r;
1996
1997 assert(link);
1998 assert(link->manager);
3104883d 1999
d7fbb9f5 2000 r = link_drop_addresses(link);
3104883d 2001
0b81225e
YW		 2002 k = link_drop_neighbors(link);
2003 if (k < 0 && r >= 0)
2004 r = k;
d1bdafd2 2005
0b81225e
YW		 2006 k = link_drop_routes(link);
2007 if (k < 0 && r >= 0)
2008 r = k;
2009
25b82b6e
YW		 2010 k = link_drop_nexthops(link);
2011 if (k < 0 && r >= 0)
2012 r = k;
2013
0b81225e
YW		 2014 k = manager_drop_routing_policy_rules(link->manager, link);
2015 if (k < 0 && r >= 0)
2016 r = k;
3104883d 2017
c69305ff
LP		 2018 ndisc_flush(link);
2019
0b81225e 2020 return r;
3104883d
SS		 2021}
2022
256c75fd 2023int link_configure(Link *link) {
4ecdcb07
YW		 2024 int r;
2025
ef1ba606 2026 assert(link);
b22d8a00 2027 assert(link->network);
bd08ce56 2028 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2029
34658df2 2030 r = link_configure_traffic_control(link);
4ecdcb07
YW		 2031 if (r < 0)
2032 return r;
2033
518cd6b5
SS		 2034 r = link_configure_sr_iov(link);
2035 if (r < 0)
2036 return r;
2037
500b96eb 2038 if (link->iftype == ARPHRD_CAN)
93ea7750 2039 return link_configure_can(link);
92c918b0 2040
5e0534f1 2041 r = link_set_sysctl(link);
b69c3180
SS		 2042 if (r < 0)
2043 return r;
8749cbcd 2044
e16e4b3b
DS		 2045 r = link_set_mac(link);
2046 if (r < 0)
2047 return r;
2048
2049 r = link_set_nomaster(link);
2050 if (r < 0)
2051 return r;
2052
99d2baa2
SS		 2053 r = link_set_flags(link);
2054 if (r < 0)
2055 return r;
2056
89fe6535
SS		 2057 r = link_set_group(link);
2058 if (r < 0)
2059 return r;
2060
2ffd6d73
YW		 2061 r = ipv4ll_configure(link);
2062 if (r < 0)
2063 return r;
64b21ece 2064
2ffd6d73
YW		 2065 r = dhcp4_configure(link);
2066 if (r < 0)
2067 return r;
eb34d4af 2068
2ffd6d73
YW		 2069 r = dhcp6_configure(link);
2070 if (r < 0)
2071 return r;
f5a8c43f 2072
2ffd6d73
YW		 2073 r = ndisc_configure(link);
2074 if (r < 0)
2075 return r;
4138fb2c 2076
086b8853
YW		 2077 r = radv_configure(link);
2078 if (r < 0)
2079 return r;
7465dd22 2080
2ffd6d73
YW		 2081 r = link_lldp_rx_configure(link);
2082 if (r < 0)
2083 return r;
ce43e484 2084
f6fcc1c2 2085 r = link_configure_mtu(link);
40288ece
YW		 2086 if (r < 0)
2087 return r;
44b598a1 2088
9f6e82e6
YW		 2089 r = link_configure_addrgen_mode(link);
2090 if (r < 0)
2091 return r;
0e2fdb83 2092
3a390124
DS		 2093 return link_configure_continue(link);
2094}
2095
2096/* The configuration continues in this separate function, instead of
2097 * including this in the above link_configure() function, for two
2098 * reasons:
2099 * 1) some devices reset the link when the mtu is set, which caused
2100 * an infinite loop here in networkd; see:
2101 * https://github.com/systemd/systemd/issues/6593
2102 * https://github.com/systemd/systemd/issues/9831
2103 * 2) if ipv6ll is disabled, then bringing the interface up must be
2104 * delayed until after we get confirmation from the kernel that
2105 * the addr_gen_mode parameter has been set (via netlink), see:
2106 * https://github.com/systemd/systemd/issues/13882
2107 */
2108static int link_configure_continue(Link *link) {
55dc8c4a
YW		 2109 int r;
2110
2111 assert(link);
2112 assert(link->network);
bd08ce56 2113 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a 2114
9524014e 2115 if (link->setting_mtu || link->setting_genmode)
55dc8c4a
YW		 2116 return 0;
2117
4c649652
DS		 2118 /* Drop foreign config, but ignore loopback or critical devices.
2119 * We do not want to remove loopback address or addresses used for root NFS. */
2120 if (!(link->flags & IFF_LOOPBACK) &&
2121 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
2122 r = link_drop_foreign_config(link);
2123 if (r < 0)
2124 return r;
2125 }
2126
d236718c
DS		 2127 /* The kernel resets ipv6 mtu after changing device mtu;
2128 * we must set this here, after we've set device mtu */
2129 r = link_set_ipv6_mtu(link);
2130 if (r < 0)
5e0534f1 2131 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface, ignoring: %m");
d236718c 2132
3f265037 2133 return link_enter_join_netdev(link);
505f8da7
TG		 2134}
2135
572b21d9 2136static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
8bceafa7 2137 _cleanup_strv_free_ char **s = NULL;
ad932b15
YW		 2138 Network *network;
2139 int r;
2140
8bceafa7 2141 assert(m);
572b21d9 2142
8bceafa7
YW		 2143 r = sd_netlink_message_get_errno(m);
2144 if (r < 0)
2145 return r;
572b21d9 2146
8bceafa7
YW		 2147 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2148 if (r < 0 && r != -ENODATA)
2149 return r;
572b21d9 2150
8bceafa7 2151 strv_free_and_replace(link->alternative_names, s);
572b21d9 2152
c643bda5
YW		 2153 r = network_get(link->manager, link->iftype, link->sd_device,
2154 link->ifname, link->alternative_names, link->driver,
b8162cd2 2155 &link->hw_addr.addr.ether, &link->permanent_mac,
c643bda5 2156 link->wlan_iftype, link->ssid, &link->bssid, &network);
ad932b15
YW		 2157 if (r == -ENOENT) {
2158 link_enter_unmanaged(link);
2159 return 0;
2160 } else if (r == 0 && network->unmanaged) {
2161 link_enter_unmanaged(link);
2162 return 0;
2163 } else if (r < 0)
2164 return r;
2165
99b8517c 2166 if (link->network == network && !force)
ad932b15
YW		 2167 return 0;
2168
2169 log_link_info(link, "Re-configuring with %s", network->filename);
2170
2171 /* Dropping old .network file */
2a99eed0 2172 r = link_stop_engines(link, false);
572b21d9 2173 if (r < 0)
ad932b15 2174 return r;
ad932b15 2175
ad932b15
YW		 2176 r = link_drop_config(link);
2177 if (r < 0)
2178 return r;
2179
2c7b826d 2180 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
ad932b15
YW		 2181 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
2182 r = link_drop_foreign_config(link);
2183 if (r < 0)
2184 return r;
2185 }
2186
2187 link_free_carrier_maps(link);
2188 link_free_engines(link);
2189 link->network = network_unref(link->network);
59c31eba 2190 link_unref(set_remove(link->manager->links_requesting_uuid, link));
ad932b15
YW		 2191
2192 /* Then, apply new .network file */
9092113d
YW		 2193 link->network = network_ref(network);
2194 link_dirty(link);
ad932b15
YW		 2195
2196 r = link_new_carrier_maps(link);
2197 if (r < 0)
2198 return r;
2199
2200 link_set_state(link, LINK_STATE_INITIALIZED);
61135582 2201 link->activated = false;
ad932b15
YW		 2202
2203 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2204 * link_configure() is called later asynchronously. */
2205 r = link_configure_duid(link);
2206 if (r <= 0)
2207 return r;
2208
2209 r = link_configure(link);
2210 if (r < 0)
2211 return r;
2212
2213 return 0;
2214}
2215
572b21d9
YW		 2216static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2217 int r;
2218
2219 r = link_reconfigure_internal(link, m, false);
2220 if (r < 0)
2221 link_enter_failed(link);
2222
2223 return 1;
2224}
2225
2226static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2227 int r;
2228
2229 r = link_reconfigure_internal(link, m, true);
2230 if (r < 0)
2231 link_enter_failed(link);
2232
2233 return 1;
2234}
2235
2236int link_reconfigure(Link *link, bool force) {
2237 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2238 int r;
2239
8bceafa7 2240 /* When link in pending or initialized state, then link_configure() will be called. To prevent
f8dd4077
ZJS		 2241 * the function from being called multiple times simultaneously, refuse to reconfigure the
2242 * interface in these cases. */
8bceafa7 2243 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED, LINK_STATE_LINGER))
f8dd4077 2244 return 0; /* 0 means no-op. */
2c0d7ed3 2245
572b21d9
YW		 2246 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2247 link->ifindex);
2248 if (r < 0)
2249 return r;
2250
2251 r = netlink_call_async(link->manager->rtnl, NULL, req,
2252 force ? link_force_reconfigure_handler : link_reconfigure_handler,
2253 link_netlink_destroy_callback, link);
2254 if (r < 0)
2255 return r;
2256
2257 link_ref(link);
2258
8bceafa7 2259 return 1; /* 1 means the interface will be reconfigured. */
572b21d9
YW		 2260}
2261
e6bf7774 2262static int link_initialized_and_synced(Link *link) {
505f8da7 2263 Network *network;
505f8da7
TG		 2264 int r;
2265
2266 assert(link);
2267 assert(link->ifname);
2268 assert(link->manager);
2269
bd08ce56
YW		 2270 /* We may get called either from the asynchronous netlink callback,
2271 * or directly for link_add() if running in a container. See link_add(). */
2272 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2273 return 0;
505f8da7 2274
6a7a4e4d 2275 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2276 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2277
0d4ad91d
AR		 2278 r = link_new_bound_by_list(link);
2279 if (r < 0)
2280 return r;
2281
2282 r = link_handle_bound_by_list(link);
2283 if (r < 0)
2284 return r;
2285
c4a03a56 2286 if (!link->network) {
0894cfe4 2287 r = wifi_get_info(link);
8d968fdd
YW		 2288 if (r < 0)
2289 return r;
2290
c643bda5
YW		 2291 r = network_get(link->manager, link->iftype, link->sd_device,
2292 link->ifname, link->alternative_names, link->driver,
b8162cd2 2293 &link->hw_addr.addr.ether, &link->permanent_mac,
c643bda5 2294 link->wlan_iftype, link->ssid, &link->bssid, &network);
c4a03a56
TG		 2295 if (r == -ENOENT) {
2296 link_enter_unmanaged(link);
4232cf04 2297 return 0;
a09dc546
DM		 2298 } else if (r == 0 && network->unmanaged) {
2299 link_enter_unmanaged(link);
2300 return 0;
c4a03a56
TG		 2301 } else if (r < 0)
2302 return r;
505f8da7 2303
c4a03a56
TG		 2304 if (link->flags & IFF_LOOPBACK) {
2305 if (network->link_local != ADDRESS_FAMILY_NO)
2306 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2307
c4a03a56
TG		 2308 if (network->dhcp != ADDRESS_FAMILY_NO)
2309 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2310
c4a03a56
TG		 2311 if (network->dhcp_server)
2312 log_link_debug(link, "Ignoring DHCP server for loopback link");
2313 }
bd2efe92 2314
9092113d
YW		 2315 link->network = network_ref(network);
2316 link_dirty(link);
c4a03a56 2317 }
505f8da7 2318
0d4ad91d
AR		 2319 r = link_new_bound_to_list(link);
2320 if (r < 0)
2321 return r;
2322
27dfc982
YW		 2323 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2324 * link_configure() is called later asynchronously. */
2325 r = link_configure_duid(link);
2326 if (r <= 0)
2327 return r;
2328
a748b692
TG		 2329 r = link_configure(link);
2330 if (r < 0)
2331 return r;
2332
4232cf04 2333 return 0;
505f8da7
TG		 2334}
2335
302a796f 2336static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
572b21d9 2337 _cleanup_strv_free_ char **s = NULL;
4ff296b0
YW		 2338 int r;
2339
572b21d9
YW		 2340 r = sd_netlink_message_get_errno(m);
2341 if (r < 0) {
40681e5c 2342 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 2343 link_enter_failed(link);
2344 return 0;
2345 }
2346
2347 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2348 if (r < 0 && r != -ENODATA) {
2349 link_enter_failed(link);
2350 return 0;
2351 }
2352
2353 strv_free_and_replace(link->alternative_names, s);
2354
4ff296b0
YW		 2355 r = link_initialized_and_synced(link);
2356 if (r < 0)
2357 link_enter_failed(link);
e6bf7774
YW		 2358 return 1;
2359}
2360
51517f9e 2361int link_initialized(Link *link, sd_device *device) {
4afd3348 2362 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2363 int r;
2364
2365 assert(link);
2366 assert(link->manager);
2367 assert(link->manager->rtnl);
2368 assert(device);
2369
8434fd5c 2370 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2371 return 0;
2372
51517f9e 2373 if (link->sd_device)
679b3605
TG		 2374 return 0;
2375
79008bdd 2376 log_link_debug(link, "udev initialized link");
bd08ce56 2377 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 2378
51517f9e 2379 link->sd_device = sd_device_ref(device);
4f561e8e 2380
3c9b8860
TG		 2381 /* udev has initialized the link, but we don't know if we have yet
2382 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2383 * when it returns we know that the pending NEWLINKs have already been
2384 * processed and that we are up-to-date */
4f561e8e 2385
3c9b8860
TG		 2386 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2387 link->ifindex);
4f561e8e
TG		 2388 if (r < 0)
2389 return r;
2390
302a796f
YW		 2391 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
2392 link_netlink_destroy_callback, link);
4f561e8e
TG		 2393 if (r < 0)
2394 return r;
2395
5da8149f
TG		 2396 link_ref(link);
2397
4f561e8e
TG		 2398 return 0;
2399}
2400
1c4baffc 2401int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 2402 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 2403 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 2404 Link *link;
5a937ea2 2405 int r;
505f8da7
TG		 2406
2407 assert(m);
fbbeb65a 2408 assert(m->rtnl);
505f8da7
TG		 2409 assert(message);
2410 assert(ret);
2411
2412 r = link_new(m, message, ret);
2413 if (r < 0)
2414 return r;
2415
2416 link = *ret;
2417
6a7a4e4d 2418 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 2419
bf331d87
YW		 2420 if (path_is_read_only_fs("/sys") <= 0) {
2421 /* udev should be around */
ae06ab10 2422 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 2423 r = sd_device_new_from_device_id(&device, ifindex_str);
2424 if (r < 0) {
4d59e14f
YW		 2425 log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m");
2426 return 0;
5c416fc4 2427 }
505f8da7 2428
5a937ea2 2429 r = sd_device_get_is_initialized(device);
51517f9e 2430 if (r < 0) {
bf331d87 2431 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 2432 goto failed;
2433 }
5a937ea2 2434 if (r == 0) {
505f8da7 2435 /* not yet ready */
79008bdd 2436 log_link_debug(link, "link pending udev initialization...");
505f8da7 2437 return 0;
3c4cb064 2438 }
505f8da7 2439
299ad32d
YW		 2440 r = device_is_renaming(device);
2441 if (r < 0) {
bf331d87 2442 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 2443 goto failed;
2444 }
2445 if (r > 0) {
bf331d87 2446 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 2447 return 0;
2448 }
2449
4f561e8e
TG		 2450 r = link_initialized(link, device);
2451 if (r < 0)
5c416fc4 2452 goto failed;
4f561e8e 2453 } else {
e6bf7774 2454 r = link_initialized_and_synced(link);
4f561e8e 2455 if (r < 0)
5c416fc4 2456 goto failed;
4f561e8e 2457 }
505f8da7 2458
a748b692 2459 return 0;
5c416fc4
TG		 2460failed:
2461 link_enter_failed(link);
2462 return r;
a748b692
TG		 2463}
2464
c601ebf7 2465int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 2466 int r;
2467
2468 assert(link);
2469
2470 log_link_info(link, "Gained IPv6LL");
2471
c601ebf7 2472 link->ipv6ll_address = *address;
e7ab854c
TG		 2473 link_check_ready(link);
2474
b9ea3d2e 2475 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 2476 r = link_acquire_ipv6_conf(link);
2477 if (r < 0) {
2478 link_enter_failed(link);
2479 return r;
2480 }
2481 }
2482
2483 return 0;
2484}
2485
9c0a72f9
TG		 2486static int link_carrier_gained(Link *link) {
2487 int r;
2488
2489 assert(link);
2490
0894cfe4 2491 r = wifi_get_info(link);
8d968fdd
YW		 2492 if (r < 0)
2493 return r;
2494 if (r > 0) {
8bceafa7 2495 r = link_reconfigure(link, false);
572b21d9
YW		 2496 if (r < 0) {
2497 link_enter_failed(link);
8d968fdd 2498 return r;
572b21d9 2499 }
8d968fdd
YW		 2500 }
2501
b9ea3d2e 2502 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 2503 r = link_acquire_conf(link);
2504 if (r < 0) {
2505 link_enter_failed(link);
2506 return r;
2507 }
6fc25497 2508
b425c3ae 2509 link_set_state(link, LINK_STATE_CONFIGURING);
682c65b0 2510 r = link_set_static_configs(link);
6fc25497
SS		 2511 if (r < 0)
2512 return r;
9c0a72f9
TG		 2513 }
2514
0d4ad91d
AR		 2515 r = link_handle_bound_by_list(link);
2516 if (r < 0)
2517 return r;
2518
1f241589
YW		 2519 if (!link->bridge_mdb_configured) {
2520 r = link_set_bridge_mdb(link);
2521 if (r < 0)
2522 return r;
2523 }
2524
2525 if (streq_ptr(link->kind, "bridge")) {
2526 Link *slave;
2527
2528 SET_FOREACH(slave, link->slaves) {
2529 if (slave->bridge_mdb_configured)
2530 continue;
2531
2532 r = link_set_bridge_mdb(slave);
2533 if (r < 0)
2534 link_enter_failed(slave);
2535 }
2536 }
3db468ea 2537
9c0a72f9
TG		 2538 return 0;
2539}
2540
2541static int link_carrier_lost(Link *link) {
2542 int r;
2543
2544 assert(link);
2545
25e992ba 2546 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 2547 return 0;
2548
fbdb6605 2549 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 2550 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
2551 * configuration and stop the clients as well. */
97e7fb39
SS		 2552 if (link->setting_mtu)
2553 return 0;
2554
2a99eed0 2555 r = link_stop_engines(link, false);
9c0a72f9
TG		 2556 if (r < 0) {
2557 link_enter_failed(link);
2558 return r;
2559 }
2560
3104883d
SS		 2561 r = link_drop_config(link);
2562 if (r < 0)
2563 return r;
2564
2c7b826d 2565 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
f258e948 2566 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 2567 r = link_drop_foreign_config(link);
2568 if (r < 0)
2569 return r;
2570 }
3104883d 2571
0d4ad91d
AR		 2572 r = link_handle_bound_by_list(link);
2573 if (r < 0)
2574 return r;
2575
9c0a72f9
TG		 2576 return 0;
2577}
2578
2579int link_carrier_reset(Link *link) {
2580 int r;
2581
2582 assert(link);
2583
2584 if (link_has_carrier(link)) {
2585 r = link_carrier_lost(link);
2586 if (r < 0)
2587 return r;
2588
2589 r = link_carrier_gained(link);
2590 if (r < 0)
2591 return r;
2592
6a7a4e4d 2593 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 2594 }
2595
2596 return 0;
2597}
2598
d236718c
DS		 2599/* This is called every time an interface admin state changes to up;
2600 * specifically, when IFF_UP flag changes from unset to set */
2601static int link_admin_state_up(Link *link) {
2602 int r;
2603
61135582
DS		 2604 assert(link);
2605
2606 if (!link->network)
2607 return 0;
2608
2609 if (link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_DOWN) {
2610 log_link_info(link, "ActivationPolicy is \"always-off\", forcing link down");
2611 return link_down(link, NULL);
2612 }
2613
d236718c
DS		 2614 /* We set the ipv6 mtu after the device mtu, but the kernel resets
2615 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
2616 * ipv6_mtu_set prevents this from trying to set it too early before
2617 * the link->network has been setup; we only need to reset it
2618 * here if we've already set it during normal initialization. */
2619 if (link->ipv6_mtu_set) {
2620 r = link_set_ipv6_mtu(link);
2621 if (r < 0)
2622 return r;
2623 }
2624
2625 return 0;
2626}
2627
61135582
DS		 2628static int link_admin_state_down(Link *link) {
2629
2630 assert(link);
2631
2632 if (!link->network)
2633 return 0;
2634
2635 if (link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_UP) {
2636 log_link_info(link, "ActivationPolicy is \"always-on\", forcing link up");
2637 return link_up(link);
2638 }
2639
2640 return 0;
2641}
2642
1c4baffc 2643int link_update(Link *link, sd_netlink_message *m) {
572b21d9 2644 _cleanup_strv_free_ char **s = NULL;
b8162cd2 2645 hw_addr_data hw_addr;
ca4e095a 2646 const char *ifname;
afe7fd56 2647 uint32_t mtu;
d236718c 2648 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 2649 int old_master, r;
22936833 2650
dd3efc09 2651 assert(link);
b8941f74 2652 assert(link->ifname);
22936833
TG		 2653 assert(m);
2654
7619683b 2655 if (link->state == LINK_STATE_LINGER) {
5238e957 2656 log_link_info(link, "Link re-added");
289e6774 2657 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 2658
2659 r = link_new_carrier_maps(link);
2660 if (r < 0)
2661 return r;
7619683b
TG		 2662 }
2663
1c4baffc 2664 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 2665 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 2666 Manager *manager = link->manager;
b8941f74 2667
30de2b89 2668 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 2669
30de2b89
YW		 2670 link_drop(link);
2671 r = link_add(manager, m, &link);
2672 if (r < 0)
2673 return r;
b8941f74
TG		 2674 }
2675
572b21d9
YW		 2676 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2677 if (r >= 0)
2678 strv_free_and_replace(link->alternative_names, s);
2679
1c4baffc 2680 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 2681 if (r >= 0 && mtu > 0) {
2682 link->mtu = mtu;
4e964aa0 2683 if (link->original_mtu == 0) {
afe7fd56 2684 link->original_mtu = mtu;
6a7a4e4d 2685 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 2686 }
2687
2688 if (link->dhcp_client) {
3c9b8860
TG		 2689 r = sd_dhcp_client_set_mtu(link->dhcp_client,
2690 link->mtu);
fc95c359
YW		 2691 if (r < 0)
2692 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 2693 }
7465dd22
PF		 2694
2695 if (link->radv) {
2696 r = sd_radv_set_mtu(link->radv, link->mtu);
2697 if (r < 0)
2698 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
2699 }
9842de0d 2700 }
69629de9 2701
e9189a1f
TG		 2702 /* The kernel may broadcast NEWLINK messages without the MAC address
2703 set, simply ignore them. */
b8162cd2
TR		 2704 r = netlink_message_read_hw_addr(m, IFLA_ADDRESS, &hw_addr);
2705 if (r >= 0 && (link->hw_addr.length != hw_addr.length ||
2706 memcmp(link->hw_addr.addr.bytes, hw_addr.addr.bytes, hw_addr.length) != 0)) {
807667f7 2707
b8162cd2 2708 memcpy(link->hw_addr.addr.bytes, hw_addr.addr.bytes, hw_addr.length);
807667f7 2709
b8162cd2 2710 log_link_debug(link, "Gained new hardware address: %s", HW_ADDR_TO_STR(&hw_addr));
807667f7 2711
a3adb4a6
YW		 2712 r = ipv4ll_update_mac(link);
2713 if (r < 0)
2714 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
807667f7 2715
d947f7f9
YW		 2716 r = dhcp4_update_mac(link);
2717 if (r < 0)
2718 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 2719
eebba6dc
YW		 2720 r = dhcp6_update_mac(link);
2721 if (r < 0)
2722 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
7465dd22 2723
d0c4275c 2724 r = radv_update_mac(link);
be9363cc
YW		 2725 if (r < 0)
2726 return log_link_warning_errno(link, r, "Could not update MAC address for Router Advertisement: %m");
807667f7
YW		 2727
2728 if (link->ndisc) {
b8162cd2 2729 r = sd_ndisc_set_mac(link->ndisc, &link->hw_addr.addr.ether);
807667f7
YW		 2730 if (r < 0)
2731 return log_link_warning_errno(link, r, "Could not update MAC for NDisc: %m");
2732 }
d93d655c
YW		 2733
2734 r = ipv4_dad_update_mac(link);
2735 if (r < 0)
2736 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m");
4f882b2a
TG		 2737 }
2738
bb262ef0
YW		 2739 old_master = link->master_ifindex;
2740 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
2741
d236718c 2742 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 2743 had_carrier = link_has_carrier(link);
2744
bb262ef0 2745 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 2746 if (r < 0)
2747 return r;
2748
d236718c
DS		 2749 if (!link_was_admin_up && (link->flags & IFF_UP)) {
2750 log_link_info(link, "Link UP");
2751
2752 r = link_admin_state_up(link);
2753 if (r < 0)
2754 return r;
61135582 2755 } else if (link_was_admin_up && !(link->flags & IFF_UP)) {
d236718c
DS		 2756 log_link_info(link, "Link DOWN");
2757
61135582
DS		 2758 r = link_admin_state_down(link);
2759 if (r < 0)
2760 return r;
2761 }
2762
273eec24
LP		 2763 r = link_update_lldp(link);
2764 if (r < 0)
2765 return r;
2766
a61bb41c
TG		 2767 carrier_gained = !had_carrier && link_has_carrier(link);
2768 carrier_lost = had_carrier && !link_has_carrier(link);
2769
2770 if (carrier_gained) {
6a7a4e4d 2771 log_link_info(link, "Gained carrier");
a61bb41c 2772
9c0a72f9
TG		 2773 r = link_carrier_gained(link);
2774 if (r < 0)
2775 return r;
a61bb41c 2776 } else if (carrier_lost) {
6a7a4e4d 2777 log_link_info(link, "Lost carrier");
a61bb41c 2778
9c0a72f9
TG		 2779 r = link_carrier_lost(link);
2780 if (r < 0)
a61bb41c 2781 return r;
a61bb41c
TG		 2782 }
2783
2784 return 0;
dd3efc09 2785}
fe8db0c5 2786
b295beea
LP		 2787static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
2788 bool space = false;
b295beea
LP		 2789 Link *link;
2790
2791 assert(f);
2792 assert(prefix);
2793
2794 if (hashmap_isempty(h))
2795 return;
2796
0d536673 2797 fputs(prefix, f);
90e74a66 2798 HASHMAP_FOREACH(link, h) {
b295beea 2799 if (space)
0d536673 2800 fputc(' ', f);
b295beea
LP		 2801
2802 fprintf(f, "%i", link->ifindex);
2803 space = true;
2804 }
2805
0d536673 2806 fputc('\n', f);
b295beea
LP		 2807}
2808
64581765 2809static void link_save_dns(Link *link, FILE *f, struct in_addr_full **dns, unsigned n_dns, bool *space) {
dddc8d1e 2810 for (unsigned j = 0; j < n_dns; j++) {
e77bd3fd 2811 const char *str;
15761549 2812
64581765
YW		 2813 if (dns[j]->ifindex != 0 && dns[j]->ifindex != link->ifindex)
2814 continue;
2815
e77bd3fd
YW		 2816 str = in_addr_full_to_string(dns[j]);
2817 if (!str)
15761549 2818 continue;
15761549
YW		 2819
2820 if (*space)
2821 fputc(' ', f);
e77bd3fd 2822 fputs(str, f);
15761549
YW		 2823 *space = true;
2824 }
2825}
2826
d5e172d2
ZJS		 2827static void serialize_addresses(
2828 FILE *f,
2829 const char *lvalue,
2830 bool *space,
2831 char **addresses,
2832 sd_dhcp_lease *lease,
2833 bool conditional,
2324fd3a 2834 sd_dhcp_lease_server_type_t what,
d5e172d2
ZJS		 2835 sd_dhcp6_lease *lease6,
2836 bool conditional6,
2837 int (*lease6_get_addr)(sd_dhcp6_lease*, const struct in6_addr**),
2838 int (*lease6_get_fqdn)(sd_dhcp6_lease*, char ***)) {
2839 int r;
2840
2841 bool _space = false;
2842 if (!space)
2843 space = &_space;
2844
2845 if (lvalue)
2846 fprintf(f, "%s=", lvalue);
2847 fputstrv(f, addresses, NULL, space);
2848
2849 if (lease && conditional) {
2850 const struct in_addr *lease_addresses;
2851
2852 r = sd_dhcp_lease_get_servers(lease, what, &lease_addresses);
2853 if (r > 0)
d8bff5cc 2854 serialize_in_addrs(f, lease_addresses, r, space, in4_addr_is_non_local);
d5e172d2
ZJS		 2855 }
2856
2857 if (lease6 && conditional6 && lease6_get_addr) {
2858 const struct in6_addr *in6_addrs;
2859
2860 r = lease6_get_addr(lease6, &in6_addrs);
d8bff5cc
ZJS		 2861 if (r > 0)
2862 serialize_in6_addrs(f, in6_addrs, r, space);
d5e172d2
ZJS		 2863 }
2864
2865 if (lease6 && conditional6 && lease6_get_fqdn) {
2866 char **in6_hosts;
2867
2868 r = lease6_get_fqdn(lease6, &in6_hosts);
2869 if (r > 0)
2870 fputstrv(f, in6_hosts, NULL, space);
2871 }
2872
2873 if (lvalue)
2874 fputc('\n', f);
2875}
2876
fe8db0c5 2877int link_save(Link *link) {
d361b373 2878 const char *admin_state, *oper_state, *carrier_state, *address_state;
68a8723c 2879 _cleanup_free_ char *temp_path = NULL;
fe8db0c5
TG		 2880 _cleanup_fclose_ FILE *f = NULL;
2881 int r;
2882
2883 assert(link);
2884 assert(link->state_file);
68a8723c 2885 assert(link->lease_file);
bbf7c048
TG		 2886 assert(link->manager);
2887
370e9930 2888 if (link->state == LINK_STATE_LINGER) {
6990fb6b 2889 (void) unlink(link->state_file);
370e9930
TG		 2890 return 0;
2891 }
2892
34437b4f
LP		 2893 link_lldp_save(link);
2894
deb2e523
TG		 2895 admin_state = link_state_to_string(link->state);
2896 assert(admin_state);
2897
e375dcde
TG		 2898 oper_state = link_operstate_to_string(link->operstate);
2899 assert(oper_state);
deb2e523 2900
ac999bf0
YW		 2901 carrier_state = link_carrier_state_to_string(link->carrier_state);
2902 assert(carrier_state);
2903
2904 address_state = link_address_state_to_string(link->address_state);
2905 assert(address_state);
2906
fe8db0c5
TG		 2907 r = fopen_temporary(link->state_file, &f, &temp_path);
2908 if (r < 0)
6a7a4e4d 2909 goto fail;
fe8db0c5 2910
5512a963 2911 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 2912
2913 fprintf(f,
2914 "# This is private data. Do not parse.\n"
deb2e523 2915 "ADMIN_STATE=%s\n"
ac999bf0
YW		 2916 "OPER_STATE=%s\n"
2917 "CARRIER_STATE=%s\n"
2918 "ADDRESS_STATE=%s\n",
2919 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 2920
bcb7a07e 2921 if (link->network) {
fe0e16db
YW		 2922 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
2923 const char *dhcp_domainname = NULL, *p;
fe0e16db 2924 bool space;
07bdc70d 2925
c1a38904
MTL		 2926 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
2927 yes_no(link->network->required_for_online));
2928
d5e172d2
ZJS		 2929 LinkOperationalStateRange st = link->network->required_operstate_for_online;
2930 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s%s%s\n",
2931 strempty(link_operstate_to_string(st.min)),
2932 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? ":" : "",
2933 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? strempty(link_operstate_to_string(st.max)) : "");
4ac77d63 2934
a853652a
DS		 2935 fprintf(f, "ACTIVATION_POLICY=%s\n",
2936 activation_policy_to_string(link->network->activation_policy));
2937
adc5b2e2
TG		 2938 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
2939
d5e172d2
ZJS		 2940 /************************************************************/
2941
0d536673 2942 fputs("DNS=", f);
ea352b40 2943 space = false;
15761549 2944 if (link->n_dns != (unsigned) -1)
64581765 2945 link_save_dns(link, f, link->dns, link->n_dns, &space);
15761549 2946 else
64581765 2947 link_save_dns(link, f, link->network->dns, link->network->n_dns, &space);
d5314fff 2948
d5e172d2
ZJS		 2949 serialize_addresses(f, NULL, &space,
2950 NULL,
2951 link->dhcp_lease,
2952 link->network->dhcp_use_dns,
ddb82ec2 2953 SD_DHCP_LEASE_DNS,
1633c457 2954 link->dhcp6_lease,
d5e172d2
ZJS		 2955 link->network->dhcp6_use_dns,
2956 sd_dhcp6_lease_get_dns,
2957 NULL);
1e7a0e21 2958
a8c10331 2959 /* Make sure to flush out old entries before we use the NDisc data */
1e7a0e21
LP		 2960 ndisc_vacuum(link);
2961
b296797f 2962 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 2963 NDiscRDNSS *dd;
2964
90e74a66 2965 SET_FOREACH(dd, link->ndisc_rdnss)
d8bff5cc 2966 serialize_in6_addrs(f, &dd->address, 1, &space);
299d578f
SS		 2967 }
2968
2969 fputc('\n', f);
2970
d5e172d2
ZJS		 2971 /************************************************************/
2972
2973 serialize_addresses(f, "NTP", NULL,
2974 link->ntp ?: link->network->ntp,
2975 link->dhcp_lease,
2976 link->network->dhcp_use_ntp,
ddb82ec2 2977 SD_DHCP_LEASE_NTP,
1633c457 2978 link->dhcp6_lease,
d5e172d2
ZJS		 2979 link->network->dhcp6_use_ntp,
2980 sd_dhcp6_lease_get_ntp_addrs,
2981 sd_dhcp6_lease_get_ntp_fqdn);
2982
2983 serialize_addresses(f, "SIP", NULL,
2a71d57f 2984 NULL,
d5e172d2
ZJS		 2985 link->dhcp_lease,
2986 link->network->dhcp_use_sip,
ddb82ec2 2987 SD_DHCP_LEASE_SIP,
2a71d57f 2988 NULL, false, NULL, NULL);
d5e172d2
ZJS		 2989
2990 /************************************************************/
bd8f6538 2991
b2a81c0b 2992 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 2993 if (link->dhcp_lease) {
b2a81c0b 2994 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 2995 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
2996 }
1633c457
YW		 2997 if (link->dhcp6_lease)
2998 (void) sd_dhcp6_lease_get_domains(link->dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 2999 }
3000
fe0e16db
YW		 3001 fputs("DOMAINS=", f);
3002 space = false;
90e74a66 3003 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains)
fe0e16db 3004 fputs_with_space(f, p, NULL, &space);
07bdc70d 3005
1e7a0e21 3006 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP		 3007 if (dhcp_domainname)
3008 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3009 if (dhcp_domains)
3010 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3011 if (dhcp6_domains)
3012 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 3013 }
3014
3015 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
3016 NDiscDNSSL *dd;
1e7a0e21 3017
90e74a66 3018 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 3019 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3020 }
b2a81c0b 3021
0d536673 3022 fputc('\n', f);
6192b846 3023
d5e172d2
ZJS		 3024 /************************************************************/
3025
fe0e16db
YW		 3026 fputs("ROUTE_DOMAINS=", f);
3027 space = false;
90e74a66 3028 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains)
fe0e16db 3029 fputs_with_space(f, p, NULL, &space);
b2a81c0b 3030
1e7a0e21 3031 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
1e7a0e21
LP		 3032 if (dhcp_domainname)
3033 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3034 if (dhcp_domains)
3035 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3036 if (dhcp6_domains)
3037 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 3038 }
3039
3040 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3041 NDiscDNSSL *dd;
1e7a0e21 3042
90e74a66 3043 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 3044 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3045 }
b2a81c0b 3046
0d536673 3047 fputc('\n', f);
67272d15 3048
d5e172d2
ZJS		 3049 /************************************************************/
3050
3c9b8860 3051 fprintf(f, "LLMNR=%s\n",
15761549 3052 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
d5e172d2
ZJS		 3053
3054 /************************************************************/
3055
aaa297d4 3056 fprintf(f, "MDNS=%s\n",
15761549 3057 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
15761549 3058
d5e172d2
ZJS		 3059 /************************************************************/
3060
3061 int dns_default_route =
3062 link->dns_default_route >= 0 ? link->dns_default_route :
3063 link->network->dns_default_route;
3064 if (dns_default_route >= 0)
3065 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(dns_default_route));
3066
3067 /************************************************************/
3068
3069 DnsOverTlsMode dns_over_tls_mode =
3070 link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID ? link->dns_over_tls_mode :
3071 link->network->dns_over_tls_mode;
3072 if (dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3073 fprintf(f, "DNS_OVER_TLS=%s\n", dns_over_tls_mode_to_string(dns_over_tls_mode));
3074
3075 /************************************************************/
3076
3077 DnssecMode dnssec_mode =
3078 link->dnssec_mode != _DNSSEC_MODE_INVALID ? link->dnssec_mode :
3079 link->network->dnssec_mode;
3080 if (dnssec_mode != _DNSSEC_MODE_INVALID)
3081 fprintf(f, "DNSSEC=%s\n", dnssec_mode_to_string(dnssec_mode));
3082
3083 /************************************************************/
3084
3085 Set *nta_anchors = link->dnssec_negative_trust_anchors;
3086 if (set_isempty(nta_anchors))
3087 nta_anchors = link->network->dnssec_negative_trust_anchors;
3088
3089 if (!set_isempty(nta_anchors)) {
8a516214
LP		 3090 const char *n;
3091
0d536673 3092 fputs("DNSSEC_NTA=", f);
8a516214 3093 space = false;
90e74a66 3094 SET_FOREACH(n, nta_anchors)
d390f8ef 3095 fputs_with_space(f, n, NULL, &space);
0d536673 3096 fputc('\n', f);
8a516214 3097 }
bcb7a07e 3098 }
7374f9d8 3099
b295beea
LP		 3100 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3101 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3102
8eb9058d 3103 if (link->dhcp_lease) {
bd91b83e 3104 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3105 if (r < 0)
c2d6bd61 3106 goto fail;
fe8db0c5 3107
7374f9d8 3108 fprintf(f,
b0e39c82
TG		 3109 "DHCP_LEASE=%s\n",
3110 link->lease_file);
deb2e523 3111 } else
6990fb6b 3112 (void) unlink(link->lease_file);
fe8db0c5 3113
5460bde5
YW		 3114 r = link_serialize_dhcp6_client(link, f);
3115 if (r < 0)
3116 goto fail;
18d8a2cf 3117
c2d6bd61
LP		 3118 r = fflush_and_check(f);
3119 if (r < 0)
3120 goto fail;
fe8db0c5 3121
af664001
YW		 3122 r = conservative_rename(temp_path, link->state_file);
3123 if (r < 0)
c2d6bd61 3124 goto fail;
fe8db0c5 3125
c2d6bd61 3126 return 0;
dacd6cee 3127
c2d6bd61 3128fail:
6a7a4e4d 3129 (void) unlink(link->state_file);
6a7a4e4d
LP		 3130 if (temp_path)
3131 (void) unlink(temp_path);
3132
dacd6cee 3133 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3134}
3135
84de38c5
TG		 3136/* The serialized state in /run is no longer up-to-date. */
3137void link_dirty(Link *link) {
3138 int r;
3139
3140 assert(link);
3141
0c241a37
SS		 3142 /* mark manager dirty as link is dirty */
3143 manager_dirty(link->manager);
3144
de7fef4b 3145 r = set_ensure_put(&link->manager->dirty_links, NULL, link);
0c241a37 3146 if (r <= 0)
de7fef4b 3147 /* Ignore allocation errors and don't take another ref if the link was already dirty */
84de38c5 3148 return;
84de38c5
TG		 3149 link_ref(link);
3150}
3151
3152/* The serialized state in /run is up-to-date */
3153void link_clean(Link *link) {
3154 assert(link);
3155 assert(link->manager);
3156
1046bf9b 3157 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 3158}
3159
c2a65950
YW		 3160int link_save_and_clean(Link *link) {
3161 int r;
3162
3163 r = link_save(link);
3164 if (r < 0)
3165 return r;
3166
3167 link_clean(link);
3168 return 0;
3169}
3170
fe8db0c5 3171static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3172 [LINK_STATE_PENDING] = "pending",
bd08ce56 3173 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 3174 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 3175 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3176 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3177 [LINK_STATE_FAILED] = "failed",
370e9930 3178 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3179};
3180
3181DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
5ecb131d
YW		 3182
3183int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg) {
3184 const char *err_msg = NULL;
3185
3186 (void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg);
d157714b
YW		 3187 return log_link_full_errno(link, level, err,
3188 "%s: %s%s%s%m",
3189 msg,
3190 strempty(err_msg),
3191 err_msg && !endswith(err_msg, ".") ? "." : "",
3192 err_msg ? " " : "");
5ecb131d 3193}
Unnamed repository; edit this file 'description' to name the repository.