]> git.ipfire.org Git - thirdparty/systemd.git/blame - src/network/networkd-link.c
projects / thirdparty / systemd.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
network: move link_dhcp4_server_enabled()
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
53e1b683 1/* SPDX-License-Identifier: LGPL-2.1+ */
f579559b 2
9aa5d8ba 3#include <netinet/in.h>
f579559b 4#include <linux/if.h>
8f815e8b 5#include <linux/if_arp.h>
518cd6b5 6#include <linux/if_link.h>
4cc7a82c 7#include <unistd.h>
f579559b 8
b5efdb8a 9#include "alloc-util.h"
737f1405
YW		 10#include "bond.h"
11#include "bridge.h"
1346b1f0 12#include "bus-util.h"
27dfc982 13#include "dhcp-identifier.h"
bd91b83e 14#include "dhcp-lease-internal.h"
686d13b9 15#include "env-file.h"
4bb7cc82 16#include "ethtool-util.h"
3ffd4af2 17#include "fd-util.h"
cf1d700d 18#include "fileio.h"
737f1405 19#include "ipvlan.h"
ef118d00 20#include "missing_network.h"
cf1d700d 21#include "netlink-util.h"
c6f7c917 22#include "network-internal.h"
fb486c90 23#include "networkd-address-label.h"
093e3533 24#include "networkd-address.h"
3ddcbeea 25#include "networkd-can.h"
8fcf1d61 26#include "networkd-dhcp-server.h"
ca5ad760
YW		 27#include "networkd-dhcp4.h"
28#include "networkd-dhcp6.h"
ee446d57 29#include "networkd-fdb.h"
ca5ad760 30#include "networkd-ipv4ll.h"
a0e5c15d 31#include "networkd-ipv6-proxy-ndp.h"
6a1af3d4
YW		 32#include "networkd-link-bus.h"
33#include "networkd-link.h"
8e1ad1ea 34#include "networkd-lldp-tx.h"
23f53b99 35#include "networkd-manager.h"
dbf63196 36#include "networkd-mdb.h"
1e7a0e21 37#include "networkd-ndisc.h"
e4a71bf3 38#include "networkd-neighbor.h"
75156ccb 39#include "networkd-nexthop.h"
518cd6b5 40#include "networkd-sriov.h"
7465dd22 41#include "networkd-radv.h"
bce67bbe 42#include "networkd-routing-policy-rule.h"
8d968fdd 43#include "networkd-wifi.h"
cf1d700d
TG		 44#include "set.h"
45#include "socket-util.h"
bf331d87 46#include "stat-util.h"
15a5e950 47#include "stdio-util.h"
8b43440b 48#include "string-table.h"
51517f9e 49#include "strv.h"
62e021a9 50#include "sysctl-util.h"
34658df2 51#include "tc.h"
e4de7287 52#include "tmpfile-util.h"
299ad32d 53#include "udev-util.h"
cf1d700d 54#include "util.h"
737f1405 55#include "vrf.h"
fc2f9534 56
f24648a6
YW		 57DUID* link_get_duid(Link *link) {
58 if (link->network->duid.type != _DUID_TYPE_INVALID)
59 return &link->network->duid;
60 else
61 return &link->manager->duid;
62}
63
2d792895 64bool link_ipv4ll_enabled(Link *link, AddressFamily mask) {
b9d74c40 65 assert(link);
910feb78 66 assert((mask & ~(ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) == 0);
b9d74c40 67
78c958f8
TG		 68 if (link->flags & IFF_LOOPBACK)
69 return false;
70
71 if (!link->network)
72 return false;
73
500b96eb 74 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 75 return false;
76
98d20a17 77 if (STRPTR_IN_SET(link->kind,
78 "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
b0486c73 79 "vti6", "nlmon", "xfrm", "bareudp"))
a8f5bba6
JD		 80 return false;
81
f410d463
YW		 82 /* L3 or L3S mode do not support ARP. */
83 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
84 return false;
85
f2bfcdb9
YW		 86 if (link->network->bond)
87 return false;
88
910feb78 89 return link->network->link_local & mask;
8bc17bb3
SS		 90}
91
f8f2f880 92bool link_ipv6ll_enabled(Link *link) {
b9d74c40
LP		 93 assert(link);
94
fa709992
LP		 95 if (!socket_ipv6_is_supported())
96 return false;
97
d0d6a4cd
TG		 98 if (link->flags & IFF_LOOPBACK)
99 return false;
100
101 if (!link->network)
102 return false;
103
500b96eb 104 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 105 return false;
106
107 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon"))
a8f5bba6
JD		 108 return false;
109
f2bfcdb9
YW		 110 if (link->network->bond)
111 return false;
112
e0ee46f2 113 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 114}
115
439689c6
SS		 116static bool link_ipv6_enabled(Link *link) {
117 assert(link);
118
119 if (!socket_ipv6_is_supported())
120 return false;
121
b102cdca 122 if (link->network->bond)
2b00a4e0
TY		 123 return false;
124
500b96eb 125 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 126 return false;
127
4cef7fe3 128 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
adfeee49
YW		 129 if (link_ipv6ll_enabled(link))
130 return true;
131
132 if (network_has_static_ipv6_configurations(link->network))
133 return true;
134
135 return false;
439689c6
SS		 136}
137
7465dd22
PF		 138static bool link_radv_enabled(Link *link) {
139 assert(link);
140
141 if (!link_ipv6ll_enabled(link))
142 return false;
143
55a7c78b 144 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 145}
146
6f7a17ff 147bool link_ip_forward_enabled(Link *link, int family) {
b9d74c40 148 assert(link);
6f7a17ff 149 assert(IN_SET(family, AF_INET, AF_INET6));
b9d74c40 150
6f7a17ff 151 if (family == AF_INET6 && !socket_ipv6_is_supported())
765afd5c
LP		 152 return false;
153
769d324c
LP		 154 if (link->flags & IFF_LOOPBACK)
155 return false;
156
157 if (!link->network)
158 return false;
159
6f7a17ff 160 return link->network->ip_forward & (family == AF_INET ? ADDRESS_FAMILY_IPV4 : ADDRESS_FAMILY_IPV6);
5a8bcb67
LP		 161}
162
23d8b221
SS		 163static bool link_proxy_arp_enabled(Link *link) {
164 assert(link);
165
166 if (link->flags & IFF_LOOPBACK)
167 return false;
168
169 if (!link->network)
170 return false;
171
172 if (link->network->proxy_arp < 0)
173 return false;
174
175 return true;
176}
177
1f0d9695 178static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 179 assert(link);
d68e2e59
LP		 180
181 if (!socket_ipv6_is_supported())
182 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
183
49092e22 184 if (link->flags & IFF_LOOPBACK)
1f0d9695 185 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 186
187 if (!link->network)
1f0d9695 188 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 189
190 return link->network->ipv6_privacy_extensions;
191}
192
57ad7607 193static int link_update_ipv6_sysctl(Link *link) {
482efedc 194 bool enabled;
439689c6
SS		 195 int r;
196
197 if (link->flags & IFF_LOOPBACK)
198 return 0;
199
482efedc
SS		 200 enabled = link_ipv6_enabled(link);
201 if (enabled) {
202 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", false);
203 if (r < 0)
57ad7607
ZJS		 204 return log_link_warning_errno(link, r, "Cannot enable IPv6: %m");
205
206 log_link_info(link, "IPv6 successfully enabled");
482efedc 207 }
439689c6
SS		 208
209 return 0;
210}
211
34bf3c00
YW		 212static bool link_is_enslaved(Link *link) {
213 if (link->flags & IFF_SLAVE)
214 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
215 return true;
216
34bf3c00
YW		 217 if (!link->network)
218 return false;
219
bb262ef0 220 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 221 return true;
222
bb262ef0
YW		 223 /* TODO: add conditions for other netdevs. */
224
34bf3c00
YW		 225 return false;
226}
227
45e11abf
YW		 228static void link_update_master_operstate(Link *link, NetDev *netdev) {
229 Link *master;
230
231 if (!netdev)
232 return;
233
7936917e
YW		 234 if (netdev->ifindex <= 0)
235 return;
236
45e11abf
YW		 237 if (link_get(link->manager, netdev->ifindex, &master) < 0)
238 return;
239
240 link_update_operstate(master, true);
241}
242
243void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 244 LinkOperationalState operstate;
1678fbb3
YW		 245 LinkCarrierState carrier_state;
246 LinkAddressState address_state;
35c5a9ca 247 _cleanup_strv_free_ char **p = NULL;
1678fbb3 248 uint8_t scope = RT_SCOPE_NOWHERE;
35c5a9ca 249 bool changed = false;
1678fbb3 250 Address *address;
14153d1b 251
84de38c5
TG		 252 assert(link);
253
254 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 255 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 256 else if (link_has_carrier(link)) {
1678fbb3
YW		 257 if (link_is_enslaved(link))
258 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 259 else
1678fbb3 260 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 261 } else if (link->flags & IFF_UP)
1678fbb3 262 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 263 else
1678fbb3 264 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 265
1678fbb3 266 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 267 Link *slave;
268
90e74a66 269 SET_FOREACH(slave, link->slaves) {
959f65d3 270 link_update_operstate(slave, false);
84de38c5 271
1678fbb3
YW		 272 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
273 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 274 }
959f65d3 275 }
84de38c5 276
90e74a66 277 SET_FOREACH(address, link->addresses) {
1678fbb3
YW		 278 if (!address_is_ready(address))
279 continue;
84de38c5 280
1678fbb3
YW		 281 if (address->scope < scope)
282 scope = address->scope;
283 }
84de38c5 284
1678fbb3 285 /* for operstate we also take foreign addresses into account */
90e74a66 286 SET_FOREACH(address, link->addresses_foreign) {
1678fbb3
YW		 287 if (!address_is_ready(address))
288 continue;
289
290 if (address->scope < scope)
291 scope = address->scope;
292 }
293
294 if (scope < RT_SCOPE_SITE)
295 /* universally accessible addresses found */
296 address_state = LINK_ADDRESS_STATE_ROUTABLE;
297 else if (scope < RT_SCOPE_HOST)
298 /* only link or site local addresses found */
299 address_state = LINK_ADDRESS_STATE_DEGRADED;
84de38c5 300 else
1678fbb3
YW		 301 /* no useful addresses found */
302 address_state = LINK_ADDRESS_STATE_OFF;
303
304 /* Mapping of address and carrier state vs operational state
305 * carrier state
306 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
307 * ------------------------------------------------------------------------------
308 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
309 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
310 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
311 */
84de38c5 312
1678fbb3
YW		 313 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
314 operstate = (LinkOperationalState) carrier_state;
315 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
316 operstate = LINK_OPERSTATE_ROUTABLE;
317 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
318 operstate = LINK_OPERSTATE_DEGRADED;
319 else
14153d1b
YW		 320 operstate = LINK_OPERSTATE_ENSLAVED;
321
35c5a9ca
YW		 322 if (link->carrier_state != carrier_state) {
323 link->carrier_state = carrier_state;
324 changed = true;
325 if (strv_extend(&p, "CarrierState") < 0)
326 log_oom();
327 }
959f65d3 328
35c5a9ca
YW		 329 if (link->address_state != address_state) {
330 link->address_state = address_state;
331 changed = true;
332 if (strv_extend(&p, "AddressState") < 0)
333 log_oom();
959f65d3
YW		 334 }
335
84de38c5
TG		 336 if (link->operstate != operstate) {
337 link->operstate = operstate;
35c5a9ca
YW		 338 changed = true;
339 if (strv_extend(&p, "OperationalState") < 0)
340 log_oom();
84de38c5 341 }
959f65d3 342
35c5a9ca
YW		 343 if (p)
344 link_send_changed_strv(link, p);
345 if (changed)
346 link_dirty(link);
347
45e11abf
YW		 348 if (also_update_master && link->network) {
349 link_update_master_operstate(link, link->network->bond);
350 link_update_master_operstate(link, link->network->bridge);
959f65d3 351 }
84de38c5
TG		 352}
353
51d18171
TG		 354#define FLAG_STRING(string, flag, old, new) \
355 (((old ^ new) & flag) \
356 ? ((old & flag) ? (" -" string) : (" +" string)) \
357 : "")
358
bb262ef0 359static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 360 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
361 uint8_t operstate;
362 int r;
363
364 assert(link);
365
366 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 367 if (r < 0)
368 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 369
1c4baffc 370 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 371 if (r < 0)
372 /* if we got a message without operstate, take it to mean
373 the state was unchanged */
374 operstate = link->kernel_operstate;
375
bb262ef0 376 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 377 return 0;
378
379 if (link->flags != flags) {
6a7a4e4d 380 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		 381 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
382 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
383 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
384 FLAG_STRING("UP", IFF_UP, link->flags, flags),
385 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
386 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
387 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
388 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
389 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
390 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
391 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
392 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
393 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
394 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
395 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
396 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
397 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
398 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
399 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
400
401 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
402 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
403 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
404 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
405 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
406 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
407 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
408 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
409
410 /* link flags are currently at most 18 bits, let's align to
411 * printing 20 */
412 if (unknown_flags_added)
79008bdd 413 log_link_debug(link,
6a7a4e4d 414 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 415 unknown_flags_added);
416
417 if (unknown_flags_removed)
79008bdd 418 log_link_debug(link,
6a7a4e4d 419 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 420 unknown_flags_removed);
421 }
422
423 link->flags = flags;
424 link->kernel_operstate = operstate;
425
959f65d3 426 link_update_operstate(link, true);
51d18171
TG		 427
428 return 0;
429}
430
1c4baffc 431static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 432 _cleanup_(link_unrefp) Link *link = NULL;
6cad256d 433 const char *ifname, *kind = NULL;
b710e6b6 434 unsigned short iftype;
572b21d9
YW		 435 int r, ifindex;
436 uint16_t type;
f579559b 437
0c2f9b84 438 assert(manager);
505f8da7 439 assert(message);
f579559b
TG		 440 assert(ret);
441
6cad256d
TJ		 442 /* check for link kind */
443 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
444 if (r == 0) {
db2f8a2e 445 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 446 r = sd_netlink_message_exit_container(message);
447 if (r < 0)
448 return r;
449 }
450
1c4baffc 451 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 452 if (r < 0)
453 return r;
454 else if (type != RTM_NEWLINK)
455 return -EINVAL;
456
457 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
458 if (r < 0)
459 return r;
460 else if (ifindex <= 0)
461 return -EINVAL;
462
b710e6b6
LP		 463 r = sd_rtnl_message_link_get_type(message, &iftype);
464 if (r < 0)
465 return r;
466
1c4baffc 467 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 468 if (r < 0)
469 return r;
470
17f9c355 471 link = new(Link, 1);
f579559b
TG		 472 if (!link)
473 return -ENOMEM;
474
17f9c355
YW		 475 *link = (Link) {
476 .n_ref = 1,
477 .manager = manager,
478 .state = LINK_STATE_PENDING,
17f9c355
YW		 479 .ifindex = ifindex,
480 .iftype = iftype,
15761549
YW		 481
482 .n_dns = (unsigned) -1,
483 .dns_default_route = -1,
484 .llmnr = _RESOLVE_SUPPORT_INVALID,
485 .mdns = _RESOLVE_SUPPORT_INVALID,
486 .dnssec_mode = _DNSSEC_MODE_INVALID,
487 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
17f9c355
YW		 488 };
489
505f8da7
TG		 490 link->ifname = strdup(ifname);
491 if (!link->ifname)
492 return -ENOMEM;
f579559b 493
6cad256d
TJ		 494 if (kind) {
495 link->kind = strdup(kind);
496 if (!link->kind)
497 return -ENOMEM;
498 }
499
cbff7170
TJ		 500 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
501 if (r < 0)
502 log_link_debug_errno(link, r, "New device has no master, continuing without");
503
1c4baffc 504 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 505 if (r < 0)
34437b4f 506 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 507
c643bda5 508 r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac);
4bb7cc82
YW		 509 if (r < 0)
510 log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
511
c643bda5
YW		 512 r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver);
513 if (r < 0)
514 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
515
572b21d9
YW		 516 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &link->alternative_names);
517 if (r < 0 && r != -ENODATA)
518 return r;
519
34437b4f 520 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 521 return -ENOMEM;
fe8db0c5 522
34437b4f 523 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 524 return -ENOMEM;
525
34437b4f 526 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 527 return -ENOMEM;
528
d5099efc 529 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 530 if (r < 0)
531 return r;
532
533 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 534 if (r < 0)
535 return r;
536
bb262ef0 537 r = link_update_flags(link, message, false);
51d18171
TG		 538 if (r < 0)
539 return r;
540
1cc6c93a 541 *ret = TAKE_PTR(link);
f579559b
TG		 542
543 return 0;
544}
545
15761549
YW		 546void link_ntp_settings_clear(Link *link) {
547 link->ntp = strv_free(link->ntp);
548}
549
550void link_dns_settings_clear(Link *link) {
e77bd3fd
YW		 551 if (link->n_dns != (unsigned) -1)
552 for (unsigned i = 0; i < link->n_dns; i++)
553 in_addr_full_free(link->dns[i]);
15761549
YW		 554 link->dns = mfree(link->dns);
555 link->n_dns = (unsigned) -1;
556
557 link->search_domains = ordered_set_free_free(link->search_domains);
558 link->route_domains = ordered_set_free_free(link->route_domains);
559
560 link->dns_default_route = -1;
561 link->llmnr = _RESOLVE_SUPPORT_INVALID;
562 link->mdns = _RESOLVE_SUPPORT_INVALID;
563 link->dnssec_mode = _DNSSEC_MODE_INVALID;
564 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
565
566 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
567}
568
1a6bb31f
YW		 569static void link_free_engines(Link *link) {
570 if (!link)
571 return;
572
573 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
574 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
575 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
1a6bb31f
YW		 576
577 link->lldp = sd_lldp_unref(link->lldp);
578
579 ndisc_flush(link);
580
581 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
582 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 583 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
1a6bb31f
YW		 584 link->ndisc = sd_ndisc_unref(link->ndisc);
585 link->radv = sd_radv_unref(link->radv);
586}
587
8301aa0b 588static Link *link_free(Link *link) {
8301aa0b 589 assert(link);
f579559b 590
15761549
YW		 591 link_ntp_settings_clear(link);
592 link_dns_settings_clear(link);
593
8eec0b9d
YW		 594 link->routes = set_free(link->routes);
595 link->routes_foreign = set_free(link->routes_foreign);
6e537f62
YW		 596 link->dhcp_routes = set_free(link->dhcp_routes);
597 link->dhcp_routes_old = set_free(link->dhcp_routes_old);
1633c457
YW		 598 link->dhcp6_routes = set_free(link->dhcp6_routes);
599 link->dhcp6_routes_old = set_free(link->dhcp6_routes_old);
600 link->dhcp6_pd_routes = set_free(link->dhcp6_pd_routes);
601 link->dhcp6_pd_routes_old = set_free(link->dhcp6_pd_routes_old);
69203fba 602 link->ndisc_routes = set_free(link->ndisc_routes);
adda1ed9 603
8eec0b9d
YW		 604 link->nexthops = set_free(link->nexthops);
605 link->nexthops_foreign = set_free(link->nexthops_foreign);
c16c7808 606
8eec0b9d
YW		 607 link->neighbors = set_free(link->neighbors);
608 link->neighbors_foreign = set_free(link->neighbors_foreign);
d1bdafd2 609
8eec0b9d
YW		 610 link->addresses = set_free(link->addresses);
611 link->addresses_foreign = set_free(link->addresses_foreign);
aa651e88 612 link->pool_addresses = set_free(link->pool_addresses);
e5526518 613 link->static_addresses = set_free(link->static_addresses);
1633c457
YW		 614 link->dhcp6_addresses = set_free(link->dhcp6_addresses);
615 link->dhcp6_addresses_old = set_free(link->dhcp6_addresses_old);
616 link->dhcp6_pd_addresses = set_free(link->dhcp6_pd_addresses);
617 link->dhcp6_pd_addresses_old = set_free(link->dhcp6_pd_addresses_old);
69203fba 618 link->ndisc_addresses = set_free(link->ndisc_addresses);
adda1ed9 619
7272b25e 620 link_lldp_emit_stop(link);
1a6bb31f 621 link_free_engines(link);
68a8723c 622 free(link->lease_file);
49699bac
SS		 623 free(link->lldp_file);
624
c166a070 625 free(link->ifname);
572b21d9 626 strv_free(link->alternative_names);
ceac4078 627 free(link->kind);
8d968fdd 628 free(link->ssid);
c643bda5 629 free(link->driver);
6cad256d 630
db2f8a2e 631 (void) unlink(link->state_file);
fe8db0c5 632 free(link->state_file);
c166a070 633
51517f9e 634 sd_device_unref(link->sd_device);
b5db00e5 635
0d4ad91d 636 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 637 hashmap_free(link->bound_by_links);
638
5f707e12 639 set_free_with_destructor(link->slaves, link_unref);
033295c1 640
c9c908a6
YW		 641 network_unref(link->network);
642
8301aa0b 643 return mfree(link);
14b746f7
TG		 644}
645
8301aa0b 646DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 647
11a7f229
TG		 648int link_get(Manager *m, int ifindex, Link **ret) {
649 Link *link;
11a7f229
TG		 650
651 assert(m);
e856ed00 652 assert(ifindex > 0);
11a7f229
TG		 653 assert(ret);
654
ae06ab10 655 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 656 if (!link)
657 return -ENODEV;
658
659 *ret = link;
660
661 return 0;
662}
663
af9ba57a 664void link_set_state(Link *link, LinkState state) {
e331e246
TG		 665 assert(link);
666
667 if (link->state == state)
668 return;
669
0beb9542
YW		 670 log_link_debug(link, "State changed: %s -> %s",
671 link_state_to_string(link->state),
672 link_state_to_string(state));
673
e331e246
TG		 674 link->state = state;
675
676 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 677}
678
57bd6899
TG		 679static void link_enter_unmanaged(Link *link) {
680 assert(link);
681
e331e246 682 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 683
84de38c5 684 link_dirty(link);
57bd6899
TG		 685}
686
95355a28 687int link_stop_clients(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 688 int r = 0, k;
689
690 assert(link);
691 assert(link->manager);
692 assert(link->manager->event);
693
80060352
ZJS		 694 bool keep_dhcp = may_keep_dhcp &&
695 link->network &&
696 (link->manager->restarting ||
697 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
698
699 if (link->dhcp_client && !keep_dhcp) {
111bb8f9 700 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 701 if (k < 0)
36c7d709 702 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 703 }
704
ba179154 705 if (link->ipv4ll) {
111bb8f9 706 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 707 if (k < 0)
36c7d709 708 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 709 }
710
2488e4d9
YW		 711 k = link_stop_ipv4_dad(link);
712 if (k < 0)
713 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
051e77ca 714
f5a8c43f
TG		 715 if (link->dhcp6_client) {
716 k = sd_dhcp6_client_stop(link->dhcp6_client);
717 if (k < 0)
36c7d709 718 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 719 }
4138fb2c 720
1633c457
YW		 721 if (link_dhcp6_pd_is_enabled(link)) {
722 k = dhcp6_pd_remove(link);
723 if (k < 0)
724 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
725 }
726
1e7a0e21
LP		 727 if (link->ndisc) {
728 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 729 if (k < 0)
36c7d709 730 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 731 }
732
7465dd22 733 if (link->radv) {
290696e5 734 k = sd_radv_stop(link->radv);
7465dd22
PF		 735 if (k < 0)
736 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
737 }
738
7272b25e 739 link_lldp_emit_stop(link);
111bb8f9
TG		 740 return r;
741}
742
b22d8a00 743void link_enter_failed(Link *link) {
ef1ba606 744 assert(link);
f882c247 745
370e9930 746 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 747 return;
748
6a7a4e4d 749 log_link_warning(link, "Failed");
449f7554 750
e331e246 751 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 752
95355a28 753 link_stop_clients(link, false);
111bb8f9 754
84de38c5 755 link_dirty(link);
f882c247
TG		 756}
757
7033af49
YW		 758static int link_join_netdevs_after_configured(Link *link) {
759 NetDev *netdev;
7033af49
YW		 760 int r;
761
90e74a66 762 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7033af49
YW		 763 if (netdev->ifindex > 0)
764 /* Assume already enslaved. */
765 continue;
766
767 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
768 continue;
769
770 log_struct(LOG_DEBUG,
771 LOG_LINK_INTERFACE(link),
772 LOG_NETDEV_INTERFACE(netdev),
773 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
774
775 r = netdev_join(netdev, link, NULL);
776 if (r < 0)
777 return log_struct_errno(LOG_WARNING, r,
778 LOG_LINK_INTERFACE(link),
779 LOG_NETDEV_INTERFACE(netdev),
780 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
781 }
782
783 return 0;
784}
785
e3a7b048 786static void link_enter_configured(Link *link) {
dd43110f
TG		 787 assert(link);
788 assert(link->network);
e3a7b048 789
289e6774 790 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 791 return;
dd43110f 792
e331e246 793 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 794
7033af49
YW		 795 (void) link_join_netdevs_after_configured(link);
796
84de38c5 797 link_dirty(link);
dd43110f
TG		 798}
799
6accfd31
DA		 800void link_check_ready(Link *link) {
801 Address *a;
6accfd31
DA		 802
803 assert(link);
804
5f58af25
YW		 805 if (link->state == LINK_STATE_CONFIGURED)
806 return;
807
808 if (link->state != LINK_STATE_CONFIGURING) {
809 log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31 810 return;
39373cb9 811 }
6accfd31
DA		 812
813 if (!link->network)
814 return;
815
39373cb9
YW		 816 if (!link->addresses_configured) {
817 log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 818 return;
39373cb9 819 }
6accfd31 820
39373cb9
YW		 821 if (!link->neighbors_configured) {
822 log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
6accfd31 823 return;
39373cb9 824 }
6accfd31 825
90e74a66 826 SET_FOREACH(a, link->addresses)
39373cb9
YW		 827 if (!address_is_ready(a)) {
828 _cleanup_free_ char *str = NULL;
829
830 (void) in_addr_to_string(a->family, &a->in_addr, &str);
831 log_link_debug(link, "%s(): an address %s/%d is not ready.", __func__, strnull(str), a->prefixlen);
6aa5773b 832 return;
39373cb9 833 }
6aa5773b 834
39373cb9
YW		 835 if (!link->static_routes_configured) {
836 log_link_debug(link, "%s(): static routes are not configured.", __func__);
6accfd31 837 return;
39373cb9 838 }
6accfd31 839
39373cb9
YW		 840 if (!link->static_nexthops_configured) {
841 log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 842 return;
39373cb9 843 }
c16c7808 844
39373cb9
YW		 845 if (!link->routing_policy_rules_configured) {
846 log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 847 return;
39373cb9 848 }
6accfd31 849
39373cb9
YW		 850 if (!link->tc_configured) {
851 log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
4ecdcb07 852 return;
39373cb9 853 }
4ecdcb07 854
39373cb9
YW		 855 if (!link->sr_iov_configured) {
856 log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 857 return;
39373cb9 858 }
518cd6b5 859
1f241589
YW		 860 if (!link->bridge_mdb_configured) {
861 log_link_debug(link, "%s(): Bridge MDB is not configured.", __func__);
862 return;
863 }
864
463797c1 865 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
50550722
YW		 866 bool has_ndisc_address = false;
867 NDiscAddress *n;
6accfd31 868
1c09d84e 869 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !link->ipv4ll_address_configured) {
39373cb9 870 log_link_debug(link, "%s(): IPv4LL is not configured.", __func__);
463797c1 871 return;
39373cb9 872 }
6accfd31 873
463797c1 874 if (link_ipv6ll_enabled(link) &&
39373cb9
YW		 875 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
876 log_link_debug(link, "%s(): IPv6LL is not configured.", __func__);
463797c1 877 return;
39373cb9 878 }
6accfd31 879
90e74a66 880 SET_FOREACH(n, link->ndisc_addresses)
50550722
YW		 881 if (!n->marked) {
882 has_ndisc_address = true;
883 break;
884 }
885
15797d6a 886 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
50550722 887 !link->dhcp_address && set_isempty(link->dhcp6_addresses) && !has_ndisc_address &&
15797d6a
YW		 888 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
889 log_link_debug(link, "%s(): DHCP4 or DHCP6 is enabled but no dynamic address is assigned yet.", __func__);
659ad3a0
YW		 890 return;
891 }
892
1633c457 893 if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_dhcp6_pd_is_enabled(link) || link_ipv6_accept_ra_enabled(link)) {
39373cb9
YW		 894 if (!link->dhcp4_configured &&
895 !(link->dhcp6_address_configured && link->dhcp6_route_configured) &&
896 !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) &&
d98c546d 897 !(link->ndisc_addresses_configured && link->ndisc_routes_configured) &&
1c09d84e 898 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
39373cb9
YW		 899 /* When DHCP or RA is enabled, at least one protocol must provide an address, or
900 * an IPv4ll fallback address must be configured. */
901 log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
902 return;
903 }
904
d98c546d 905 log_link_debug(link, "%s(): dhcp4:%s dhcp6_addresses:%s dhcp_routes:%s dhcp_pd_addresses:%s dhcp_pd_routes:%s ndisc_addresses:%s ndisc_routes:%s",
39373cb9
YW		 906 __func__,
907 yes_no(link->dhcp4_configured),
908 yes_no(link->dhcp6_address_configured),
909 yes_no(link->dhcp6_route_configured),
910 yes_no(link->dhcp6_pd_address_configured),
911 yes_no(link->dhcp6_pd_route_configured),
d98c546d
YW		 912 yes_no(link->ndisc_addresses_configured),
913 yes_no(link->ndisc_routes_configured));
39373cb9 914 }
463797c1 915 }
6accfd31 916
5f58af25 917 link_enter_configured(link);
6accfd31
DA		 918
919 return;
920}
921
682c65b0 922static int link_set_static_configs(Link *link) {
f882c247
TG		 923 int r;
924
925 assert(link);
926 assert(link->network);
f5be5601 927 assert(link->state != _LINK_STATE_INVALID);
f882c247 928
2428613f 929 /* Reset all *_configured flags we are configuring. */
9b966cee 930 link->request_static_addresses = false;
2428613f 931 link->addresses_configured = false;
6aa5773b 932 link->addresses_ready = false;
2428613f
YW		 933 link->neighbors_configured = false;
934 link->static_routes_configured = false;
c16c7808 935 link->static_nexthops_configured = false;
2428613f
YW		 936 link->routing_policy_rules_configured = false;
937
f6bb7ac5
TJ		 938 r = link_set_bridge_fdb(link);
939 if (r < 0)
940 return r;
941
1f241589
YW		 942 r = link_set_bridge_mdb(link);
943 if (r < 0)
944 return r;
945
58f1fe9a 946 r = link_set_neighbors(link);
f3ef324d
YW		 947 if (r < 0)
948 return r;
e4a71bf3 949
682c65b0
YW		 950 r = link_set_addresses(link);
951 if (r < 0)
952 return r;
bd6379ec 953
fe2bc17c
YW		 954 r = link_set_address_labels(link);
955 if (r < 0)
956 return r;
f882c247 957
e5526518 958 /* now that we can figure out a default address for the dhcp server, start it */
5ae0fb7f
YW		 959 r = dhcp4_server_configure(link);
960 if (r < 0)
961 return r;
d4cdbea5 962
f882c247
TG		 963 return 0;
964}
965
13b498f9 966static int link_set_bridge_vlan(Link *link) {
86e2be7b 967 int r;
13b498f9
TJ		 968
969 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
970 if (r < 0)
971 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
972
973 return r;
974}
975
a60a720c 976static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 977 int r;
978
979 if (!link_proxy_arp_enabled(link))
980 return 0;
981
62e021a9 982 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 983 if (r < 0)
984 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
985
986 return 0;
987}
988
3a390124 989static int link_configure_continue(Link *link);
55dc8c4a 990
302a796f 991static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 992 int r;
993
994 assert(m);
995 assert(link);
996 assert(link->ifname);
997
55dc8c4a
YW		 998 link->setting_mtu = false;
999
5da8149f 1000 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1001 return 1;
1002
1c4baffc 1003 r = sd_netlink_message_get_errno(m);
4ff296b0 1004 if (r < 0)
5ecb131d 1005 log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring");
4ff296b0
YW		 1006 else
1007 log_link_debug(link, "Setting MTU done.");
55dc8c4a 1008
4ff296b0 1009 if (link->state == LINK_STATE_INITIALIZED) {
3a390124 1010 r = link_configure_continue(link);
4ff296b0
YW		 1011 if (r < 0)
1012 link_enter_failed(link);
1013 }
4f882b2a
TG		 1014
1015 return 1;
1016}
1017
933c70a0 1018int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1019 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1020 int r;
1021
1022 assert(link);
1023 assert(link->manager);
1024 assert(link->manager->rtnl);
1025
40288ece
YW		 1026 if (mtu == 0 || link->setting_mtu)
1027 return 0;
1028
933c70a0 1029 if (link->mtu == mtu)
ee493106
YW		 1030 return 0;
1031
6a7a4e4d 1032 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1033
6a7a4e4d
LP		 1034 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1035 if (r < 0)
1036 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1037
44b598a1 1038 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1039 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1040 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1041
1042 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
d236718c 1043 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes");
44b598a1 1044
72c2500b 1045 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1046 }
1047
1c4baffc 1048 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1049 if (r < 0)
1050 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1051
302a796f
YW		 1052 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1053 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1054 if (r < 0)
1055 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1056
ae941762 1057 link_ref(link);
1046bf9b 1058 link->setting_mtu = true;
b226d99b 1059
4f882b2a
TG		 1060 return 0;
1061}
1062
f6fcc1c2
YW		 1063static bool link_reduces_vlan_mtu(Link *link) {
1064 /* See netif_reduces_vlan_mtu() in kernel. */
1065 return streq_ptr(link->kind, "macsec");
1066}
1067
1068static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1069 uint32_t mtu = 0;
1070 NetDev *dev;
f6fcc1c2 1071
90e74a66 1072 HASHMAP_FOREACH(dev, link->network->stacked_netdevs)
f6fcc1c2
YW		 1073 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1074 /* See vlan_dev_change_mtu() in kernel. */
1075 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1076
1077 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1078 /* See macvlan_change_mtu() in kernel. */
1079 mtu = dev->mtu;
1080
1081 return mtu;
1082}
1083
1084static int link_configure_mtu(Link *link) {
1085 uint32_t mtu;
1086
1087 assert(link);
1088 assert(link->network);
1089
1090 if (link->network->mtu > 0)
1091 return link_set_mtu(link, link->network->mtu);
1092
1093 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1094 if (link->mtu >= mtu)
1095 return 0;
1096
1097 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1098 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1099 link->mtu, mtu);
1100
1101 return link_set_mtu(link, mtu);
1102}
1103
302a796f 1104static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1105 int r;
1106
1107 assert(m);
1108 assert(link);
1109 assert(link->ifname);
1110
1111 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1112 return 1;
1113
1114 r = sd_netlink_message_get_errno(m);
1115 if (r < 0)
5ecb131d 1116 log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring");
99d2baa2
SS		 1117
1118 return 1;
1119}
1120
1121static int link_set_flags(Link *link) {
1122 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1123 unsigned ifi_change = 0;
1124 unsigned ifi_flags = 0;
1125 int r;
1126
1127 assert(link);
1128 assert(link->manager);
1129 assert(link->manager->rtnl);
1130
1131 if (link->flags & IFF_LOOPBACK)
1132 return 0;
1133
1134 if (!link->network)
1135 return 0;
1136
866e6b7a 1137 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1138 return 0;
1139
1140 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1141 if (r < 0)
1142 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1143
1144 if (link->network->arp >= 0) {
1145 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1146 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1147 }
1148
1149 if (link->network->multicast >= 0) {
1150 ifi_change |= IFF_MULTICAST;
1151 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1152 }
1153
866e6b7a
SS		 1154 if (link->network->allmulticast >= 0) {
1155 ifi_change |= IFF_ALLMULTI;
1156 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1157 }
1158
99d2baa2
SS		 1159 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1160 if (r < 0)
1161 return log_link_error_errno(link, r, "Could not set link flags: %m");
1162
302a796f
YW		 1163 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1164 link_netlink_destroy_callback, link);
99d2baa2
SS		 1165 if (r < 0)
1166 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1167
1168 link_ref(link);
1169
1170 return 0;
1171}
1172
e7ab854c
TG		 1173static int link_acquire_ipv6_conf(Link *link) {
1174 int r;
1175
1176 assert(link);
1177
e7ab854c 1178 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1179 assert(link->ndisc);
e7ab854c
TG		 1180
1181 log_link_debug(link, "Discovering IPv6 routers");
1182
1e7a0e21 1183 r = sd_ndisc_start(link->ndisc);
63348d13 1184 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1185 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1186 }
1187
7465dd22
PF		 1188 if (link_radv_enabled(link)) {
1189 assert(link->radv);
1190 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1191
1192 log_link_debug(link, "Starting IPv6 Router Advertisements");
1193
fd3ef936
YW		 1194 r = radv_emit_dns(link);
1195 if (r < 0)
1196 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
1197
7465dd22
PF		 1198 r = sd_radv_start(link->radv);
1199 if (r < 0 && r != -EBUSY)
1200 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1201 }
1202
838d39af
SS		 1203 if (link_dhcp6_enabled(link) && IN_SET(link->network->dhcp6_without_ra,
1204 DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST,
1205 DHCP6_CLIENT_START_MODE_SOLICIT)) {
cd305af1
SS		 1206 assert(link->dhcp6_client);
1207 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1208
838d39af 1209 r = dhcp6_request_address(link, link->network->dhcp6_without_ra == DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST);
cd305af1 1210 if (r < 0 && r != -EBUSY)
1633c457 1211 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
cd305af1
SS		 1212 else
1213 log_link_debug(link, "Acquiring DHCPv6 lease");
1214 }
1215
1633c457
YW		 1216 r = dhcp6_request_prefix_delegation(link);
1217 if (r < 0)
1218 return log_link_warning_errno(link, r, "Failed to request DHCPv6 prefix delegation: %m");
10752343 1219
e7ab854c
TG		 1220 return 0;
1221}
1222
6fc25497 1223static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1224 int r;
1225
1226 assert(link);
ff254138
TG		 1227 assert(link->manager);
1228 assert(link->manager->event);
1229
910feb78 1230 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1231 assert(link->ipv4ll);
ff254138 1232
6a7a4e4d 1233 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1234
1235 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1236 if (r < 0)
1237 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1238 }
1239
78c958f8 1240 if (link_dhcp4_enabled(link)) {
eb34d4af 1241 assert(link->dhcp_client);
ff254138 1242
6a7a4e4d 1243 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1244
5c1d3fc9 1245 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1246 if (r < 0)
1247 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1248 }
ff254138 1249
6fc25497
SS		 1250 return 0;
1251}
1252
1253static int link_acquire_conf(Link *link) {
1254 int r;
1255
1256 assert(link);
1257
1258 r = link_acquire_ipv4_conf(link);
1259 if (r < 0)
1260 return r;
1261
3f7cc080 1262 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1263 r = link_acquire_ipv6_conf(link);
1264 if (r < 0)
1265 return r;
1266 }
1267
7272b25e
LP		 1268 if (link_lldp_emit_enabled(link)) {
1269 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1270 if (r < 0)
1271 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1272 }
1273
ff254138
TG		 1274 return 0;
1275}
1276
a61bb41c 1277bool link_has_carrier(Link *link) {
deb2e523
TG		 1278 /* see Documentation/networking/operstates.txt in the kernel sources */
1279
a61bb41c 1280 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1281 return true;
1282
a61bb41c 1283 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1284 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1285 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1286 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1287 return true;
1288
1289 return false;
1290}
1291
0e2fdb83
SS		 1292static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1293 int r;
1294
1295 assert(link);
1296
9524014e
DS		 1297 link->setting_genmode = false;
1298
0e2fdb83
SS		 1299 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1300 return 1;
1301
1302 r = sd_netlink_message_get_errno(m);
1303 if (r < 0)
5ecb131d 1304 log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring");
9524014e
DS		 1305 else
1306 log_link_debug(link, "Setting address genmode done.");
1307
1308 if (link->state == LINK_STATE_INITIALIZED) {
1309 r = link_configure_continue(link);
1310 if (r < 0)
1311 link_enter_failed(link);
1312 }
0e2fdb83
SS		 1313
1314 return 1;
1315}
1316
1317static int link_configure_addrgen_mode(Link *link) {
1318 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1319 uint8_t ipv6ll_mode;
1320 int r;
1321
1322 assert(link);
1323 assert(link->network);
1324 assert(link->manager);
1325 assert(link->manager->rtnl);
1326
9524014e 1327 if (!socket_ipv6_is_supported() || link->setting_genmode)
9f6e82e6
YW		 1328 return 0;
1329
0e2fdb83
SS		 1330 log_link_debug(link, "Setting address genmode for link");
1331
1332 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1333 if (r < 0)
1334 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1335
1336 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1337 if (r < 0)
1338 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1339
1340 r = sd_netlink_message_open_container(req, AF_INET6);
1341 if (r < 0)
1342 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1343
1344 if (!link_ipv6ll_enabled(link))
1345 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
6f6296b9 1346 else if (link->network->ipv6ll_address_gen_mode < 0) {
a6f1848a
SS		 1347 r = sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL);
1348 if (r < 0) {
1349 /* The file may not exist. And even if it exists, when stable_secret is unset,
1350 * reading the file fails with EIO. */
1351 log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret: %m");
1352
1353 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1354 } else
1355 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1356 } else
6f6296b9 1357 ipv6ll_mode = link->network->ipv6ll_address_gen_mode;
0e2fdb83
SS		 1358
1359 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1360 if (r < 0)
1361 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1362
1363 r = sd_netlink_message_close_container(req);
1364 if (r < 0)
1365 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1366
1367 r = sd_netlink_message_close_container(req);
1368 if (r < 0)
1369 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1370
1371 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1372 link_netlink_destroy_callback, link);
1373 if (r < 0)
1374 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1375
1376 link_ref(link);
9524014e 1377 link->setting_genmode = true;
0e2fdb83
SS		 1378
1379 return 0;
1380}
1381
302a796f 1382static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1383 int r;
1384
1746cf2a
TG		 1385 assert(link);
1386
5da8149f 1387 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1388 return 1;
1389
1c4baffc 1390 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1391 if (r < 0)
26d6b214 1392 /* we warn but don't fail the link, as it may be brought up later */
5ecb131d 1393 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
45ad2c13 1394
f882c247
TG		 1395 return 1;
1396}
1397
1cc84f3b 1398static int link_up(Link *link) {
4afd3348 1399 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1400 int r;
1401
f882c247 1402 assert(link);
c106cc36 1403 assert(link->network);
f882c247
TG		 1404 assert(link->manager);
1405 assert(link->manager->rtnl);
1406
6a7a4e4d 1407 log_link_debug(link, "Bringing link up");
449f7554 1408
6a7a4e4d
LP		 1409 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1410 if (r < 0)
1411 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1412
2b2d8603 1413 /* set it free if not enslaved with networkd */
6cb955c6 1414 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1415 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1416 if (r < 0)
1417 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1418 }
1419
5d4795f3 1420 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1421 if (r < 0)
1422 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1423
c106cc36 1424 if (link->network->mac) {
1c4baffc 1425 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1426 if (r < 0)
1427 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1428 }
1429
302a796f
YW		 1430 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1431 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1432 if (r < 0)
1433 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1434
b226d99b
TG		 1435 link_ref(link);
1436
f882c247
TG		 1437 return 0;
1438}
1439
302a796f 1440static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1441 int r;
1442
1443 assert(link);
1444
1445 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1446 return 1;
1447
1c4baffc 1448 r = sd_netlink_message_get_errno(m);
0d4ad91d 1449 if (r < 0)
5ecb131d 1450 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
0d4ad91d
AR		 1451
1452 return 1;
1453}
1454
8e54db83 1455int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1456 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1457 int r;
1458
1459 assert(link);
1460 assert(link->manager);
1461 assert(link->manager->rtnl);
1462
6a7a4e4d 1463 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1464
1465 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1466 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1467 if (r < 0)
1468 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1469
1470 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1471 if (r < 0)
1472 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1473
8e54db83
YW		 1474 r = netlink_call_async(link->manager->rtnl, NULL, req,
1475 callback ?: link_down_handler,
302a796f 1476 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1477 if (r < 0)
1478 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1479
1480 link_ref(link);
1481
1482 return 0;
1483}
1484
89fe6535
SS		 1485static int link_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1486 int r;
1487
1488 assert(link);
1489
1490 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1491 return 1;
1492
1493 r = sd_netlink_message_get_errno(m);
1494 if (r < 0)
1495 log_link_message_warning_errno(link, m, r, "Could not set group for the interface");
1496
1497 return 1;
1498}
1499
1500static int link_set_group(Link *link) {
1501 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1502 int r;
1503
1504 assert(link);
1505 assert(link->network);
1506 assert(link->manager);
1507 assert(link->manager->rtnl);
1508
1509 if (link->network->group <= 0)
1510 return 0;
1511
1512 log_link_debug(link, "Setting group");
1513
1514 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1515 if (r < 0)
1516 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1517
1518 r = sd_netlink_message_append_u32(req, IFLA_GROUP, link->network->group);
1519 if (r < 0)
1520 return log_link_error_errno(link, r, "Could not set link group: %m");
1521
1522 r = netlink_call_async(link->manager->rtnl, NULL, req, link_group_handler,
1523 link_netlink_destroy_callback, link);
1524 if (r < 0)
1525 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1526
1527 link_ref(link);
1528
1529 return 0;
1530}
1531
0d4ad91d
AR		 1532static int link_handle_bound_to_list(Link *link) {
1533 Link *l;
0d4ad91d
AR		 1534 int r;
1535 bool required_up = false;
1536 bool link_is_up = false;
1537
1538 assert(link);
1539
1540 if (hashmap_isempty(link->bound_to_links))
1541 return 0;
1542
1543 if (link->flags & IFF_UP)
1544 link_is_up = true;
1545
90e74a66 1546 HASHMAP_FOREACH (l, link->bound_to_links)
0d4ad91d
AR		 1547 if (link_has_carrier(l)) {
1548 required_up = true;
1549 break;
1550 }
1551
1552 if (!required_up && link_is_up) {
8e54db83 1553 r = link_down(link, NULL);
0d4ad91d
AR		 1554 if (r < 0)
1555 return r;
1556 } else if (required_up && !link_is_up) {
1557 r = link_up(link);
1558 if (r < 0)
1559 return r;
1560 }
1561
1562 return 0;
1563}
1564
1565static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 1566 Link *l;
1567 int r;
1568
1569 assert(link);
1570
1571 if (hashmap_isempty(link->bound_by_links))
1572 return 0;
1573
90e74a66 1574 HASHMAP_FOREACH (l, link->bound_by_links) {
0d4ad91d
AR		 1575 r = link_handle_bound_to_list(l);
1576 if (r < 0)
1577 return r;
1578 }
1579
1580 return 0;
1581}
1582
1583static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1584 int r;
1585
1586 assert(link);
1587 assert(carrier);
1588
1589 if (link == carrier)
1590 return 0;
1591
1592 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1593 return 0;
1594
1595 r = hashmap_ensure_allocated(h, NULL);
1596 if (r < 0)
1597 return r;
1598
1599 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1600 if (r < 0)
1601 return r;
1602
1603 return 0;
1604}
1605
1606static int link_new_bound_by_list(Link *link) {
1607 Manager *m;
1608 Link *carrier;
0d4ad91d
AR		 1609 int r;
1610 bool list_updated = false;
1611
1612 assert(link);
1613 assert(link->manager);
1614
1615 m = link->manager;
1616
90e74a66 1617 HASHMAP_FOREACH(carrier, m->links) {
0d4ad91d
AR		 1618 if (!carrier->network)
1619 continue;
1620
1621 if (strv_isempty(carrier->network->bind_carrier))
1622 continue;
1623
191a3f16 1624 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 1625 r = link_put_carrier(link, carrier, &link->bound_by_links);
1626 if (r < 0)
1627 return r;
1628
1629 list_updated = true;
1630 }
1631 }
1632
1633 if (list_updated)
84de38c5 1634 link_dirty(link);
0d4ad91d 1635
90e74a66 1636 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 1637 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1638 if (r < 0)
1639 return r;
1640
84de38c5 1641 link_dirty(carrier);
0d4ad91d
AR		 1642 }
1643
1644 return 0;
1645}
1646
1647static int link_new_bound_to_list(Link *link) {
1648 Manager *m;
1649 Link *carrier;
0d4ad91d
AR		 1650 int r;
1651 bool list_updated = false;
1652
1653 assert(link);
1654 assert(link->manager);
1655
1656 if (!link->network)
1657 return 0;
1658
1659 if (strv_isempty(link->network->bind_carrier))
1660 return 0;
1661
1662 m = link->manager;
1663
90e74a66 1664 HASHMAP_FOREACH (carrier, m->links) {
191a3f16 1665 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 1666 r = link_put_carrier(link, carrier, &link->bound_to_links);
1667 if (r < 0)
1668 return r;
1669
1670 list_updated = true;
1671 }
1672 }
1673
1674 if (list_updated)
84de38c5 1675 link_dirty(link);
0d4ad91d 1676
90e74a66 1677 HASHMAP_FOREACH (carrier, link->bound_to_links) {
0d4ad91d
AR		 1678 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1679 if (r < 0)
1680 return r;
1681
84de38c5 1682 link_dirty(carrier);
0d4ad91d
AR		 1683 }
1684
1685 return 0;
1686}
1687
1688static int link_new_carrier_maps(Link *link) {
1689 int r;
1690
1691 r = link_new_bound_by_list(link);
1692 if (r < 0)
1693 return r;
1694
1695 r = link_handle_bound_by_list(link);
1696 if (r < 0)
1697 return r;
1698
1699 r = link_new_bound_to_list(link);
1700 if (r < 0)
1701 return r;
1702
1703 r = link_handle_bound_to_list(link);
1704 if (r < 0)
1705 return r;
1706
1707 return 0;
1708}
1709
1710static void link_free_bound_to_list(Link *link) {
1711 Link *bound_to;
0d4ad91d 1712
90e74a66 1713 HASHMAP_FOREACH (bound_to, link->bound_to_links) {
0d4ad91d
AR		 1714 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
1715
1716 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 1717 link_dirty(bound_to);
0d4ad91d
AR		 1718 }
1719
1720 return;
1721}
1722
1723static void link_free_bound_by_list(Link *link) {
1724 Link *bound_by;
0d4ad91d 1725
90e74a66 1726 HASHMAP_FOREACH (bound_by, link->bound_by_links) {
0d4ad91d
AR		 1727 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
1728
1729 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 1730 link_dirty(bound_by);
0d4ad91d
AR		 1731 link_handle_bound_to_list(bound_by);
1732 }
1733 }
1734
1735 return;
1736}
1737
1738static void link_free_carrier_maps(Link *link) {
1739 bool list_updated = false;
1740
1741 assert(link);
1742
1743 if (!hashmap_isempty(link->bound_to_links)) {
1744 link_free_bound_to_list(link);
1745 list_updated = true;
1746 }
1747
1748 if (!hashmap_isempty(link->bound_by_links)) {
1749 link_free_bound_by_list(link);
1750 list_updated = true;
1751 }
1752
1753 if (list_updated)
84de38c5 1754 link_dirty(link);
0d4ad91d
AR		 1755
1756 return;
1757}
1758
5f707e12
YW		 1759static int link_append_to_master(Link *link, NetDev *netdev) {
1760 Link *master;
1761 int r;
1762
1763 assert(link);
1764 assert(netdev);
1765
1766 r = link_get(link->manager, netdev->ifindex, &master);
1767 if (r < 0)
1768 return r;
1769
de7fef4b 1770 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 1771 if (r <= 0)
5f707e12
YW		 1772 return r;
1773
1774 link_ref(link);
1775 return 0;
1776}
1777
1778static void link_drop_from_master(Link *link, NetDev *netdev) {
1779 Link *master;
1780
1781 assert(link);
1782
1783 if (!link->manager || !netdev)
1784 return;
1785
1786 if (link_get(link->manager, netdev->ifindex, &master) < 0)
1787 return;
1788
1789 link_unref(set_remove(master->slaves, link));
1790}
1791
1792static void link_detach_from_manager(Link *link) {
1793 if (!link || !link->manager)
1794 return;
1795
1796 link_unref(set_remove(link->manager->links_requesting_uuid, link));
1797 link_clean(link);
1798
1799 /* The following must be called at last. */
1800 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
1801 link_unref(link);
1802}
1803
0d4ad91d
AR		 1804void link_drop(Link *link) {
1805 if (!link || link->state == LINK_STATE_LINGER)
1806 return;
1807
1808 link_set_state(link, LINK_STATE_LINGER);
1809
1810 link_free_carrier_maps(link);
1811
5f707e12
YW		 1812 if (link->network) {
1813 link_drop_from_master(link, link->network->bridge);
1814 link_drop_from_master(link, link->network->bond);
1815 }
1816
6a7a4e4d 1817 log_link_debug(link, "Link removed");
0d4ad91d 1818
db2f8a2e 1819 (void) unlink(link->state_file);
c4397d94 1820 link_detach_from_manager(link);
0d4ad91d
AR		 1821}
1822
3f265037 1823static int link_joined(Link *link) {
f882c247
TG		 1824 int r;
1825
ef1ba606 1826 assert(link);
f5be5601 1827 assert(link->network);
dd3efc09 1828
0d4ad91d
AR		 1829 if (!hashmap_isempty(link->bound_to_links)) {
1830 r = link_handle_bound_to_list(link);
1831 if (r < 0)
1832 return r;
1833 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 1834 r = link_up(link);
1835 if (r < 0) {
1836 link_enter_failed(link);
1837 return r;
1838 }
ef1ba606 1839 }
f882c247 1840
9ed794a3 1841 if (link->network->bridge) {
e1853b00 1842 r = link_set_bridge(link);
6a7a4e4d
LP		 1843 if (r < 0)
1844 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 1845
1846 r = link_append_to_master(link, link->network->bridge);
1847 if (r < 0)
1848 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 1849 }
1850
eb64b435 1851 if (link->network->bond) {
7fcee284 1852 r = link_set_bond(link);
eb64b435
SS		 1853 if (r < 0)
1854 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 1855
45e11abf 1856 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 1857 if (r < 0)
1858 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 1859 }
1860
ffff9abe
TJ		 1861 if (link->network->use_br_vlan &&
1862 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 1863 r = link_set_bridge_vlan(link);
1864 if (r < 0)
1865 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
1866 }
1867
c1835a42
RM		 1868 /* Skip setting up addresses until it gets carrier,
1869 or it would try to set addresses twice,
1870 which is bad for non-idempotent steps. */
dad2d78e 1871 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 1872 return 0;
1873
b425c3ae 1874 link_set_state(link, LINK_STATE_CONFIGURING);
682c65b0 1875 return link_set_static_configs(link);
02b59d57
TG		 1876}
1877
302a796f 1878static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 1879 int r;
1880
1746cf2a 1881 assert(link);
ef1ba606 1882 assert(link->network);
34bf3c00 1883 assert(link->enslaving > 0);
02b59d57 1884
313cefa1 1885 link->enslaving--;
52433f6b 1886
5da8149f 1887 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 1888 return 1;
1889
1c4baffc 1890 r = sd_netlink_message_get_errno(m);
856f962c 1891 if (r < 0 && r != -EEXIST) {
5ecb131d 1892 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG		 1893 link_enter_failed(link);
1894 return 1;
4ff296b0
YW		 1895 }
1896
1897 log_link_debug(link, "Joined netdev");
02b59d57 1898
34bf3c00 1899 if (link->enslaving == 0) {
4ff296b0
YW		 1900 r = link_joined(link);
1901 if (r < 0)
1902 link_enter_failed(link);
34bf3c00 1903 }
02b59d57
TG		 1904
1905 return 1;
1906}
1907
3f265037 1908static int link_enter_join_netdev(Link *link) {
6a0a2f86 1909 NetDev *netdev;
02b59d57
TG		 1910 int r;
1911
1912 assert(link);
1913 assert(link->network);
bd08ce56 1914 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 1915
289e6774 1916 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 1917
84de38c5 1918 link_dirty(link);
34bf3c00 1919 link->enslaving = 0;
02b59d57 1920
d9c67ea1 1921 if (link->network->bond) {
cbff7170
TJ		 1922 if (link->network->bond->state == NETDEV_STATE_READY &&
1923 link->network->bond->ifindex == link->master_ifindex)
1924 return link_joined(link);
1925
f2341e0a
LP		 1926 log_struct(LOG_DEBUG,
1927 LOG_LINK_INTERFACE(link),
1928 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1929 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 1930
34bf3c00
YW		 1931 link->enslaving++;
1932
f2341e0a 1933 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 1934 if (r < 0) {
f2341e0a
LP		 1935 log_struct_errno(LOG_WARNING, r,
1936 LOG_LINK_INTERFACE(link),
1937 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1938 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 1939 link_enter_failed(link);
1940 return r;
1941 }
0ad6148e
MO		 1942 }
1943
d9c67ea1 1944 if (link->network->bridge) {
f2341e0a
LP		 1945 log_struct(LOG_DEBUG,
1946 LOG_LINK_INTERFACE(link),
1947 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1948 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 1949
34bf3c00
YW		 1950 link->enslaving++;
1951
f2341e0a 1952 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 1953 if (r < 0) {
f2341e0a
LP		 1954 log_struct_errno(LOG_WARNING, r,
1955 LOG_LINK_INTERFACE(link),
1956 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1957 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 1958 link_enter_failed(link);
1959 return r;
1960 }
52433f6b
TG		 1961 }
1962
6cb955c6
AR		 1963 if (link->network->vrf) {
1964 log_struct(LOG_DEBUG,
1965 LOG_LINK_INTERFACE(link),
1966 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 1967 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
1968
34bf3c00
YW		 1969 link->enslaving++;
1970
6cb955c6
AR		 1971 r = netdev_join(link->network->vrf, link, netdev_join_handler);
1972 if (r < 0) {
1973 log_struct_errno(LOG_WARNING, r,
1974 LOG_LINK_INTERFACE(link),
1975 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 1976 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 1977 link_enter_failed(link);
1978 return r;
1979 }
6cb955c6
AR		 1980 }
1981
90e74a66 1982 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7951dea2 1983
2b6db913
YW		 1984 if (netdev->ifindex > 0)
1985 /* Assume already enslaved. */
a63e5daa 1986 continue;
a63e5daa 1987
7033af49
YW		 1988 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
1989 continue;
1990
f2341e0a
LP		 1991 log_struct(LOG_DEBUG,
1992 LOG_LINK_INTERFACE(link),
1993 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 1994 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 1995
34bf3c00
YW		 1996 link->enslaving++;
1997
f2341e0a 1998 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 1999 if (r < 0) {
f2341e0a
LP		 2000 log_struct_errno(LOG_WARNING, r,
2001 LOG_LINK_INTERFACE(link),
2002 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2003 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2004 link_enter_failed(link);
2005 return r;
2006 }
326cb406
SS		 2007 }
2008
34bf3c00
YW		 2009 if (link->enslaving == 0)
2010 return link_joined(link);
2011
ef1ba606
TG		 2012 return 0;
2013}
2014
769d324c 2015static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2016 int r;
2017
765afd5c 2018 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2019 return 0;
2020
765afd5c
LP		 2021 /* We propagate the forwarding flag from one interface to the
2022 * global setting one way. This means: as long as at least one
2023 * interface was configured at any time that had IP forwarding
2024 * enabled the setting will stay on for good. We do this
2025 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2026 * somewhat in sync (see below). */
15dee3f0 2027
62e021a9 2028 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2029 if (r < 0)
765afd5c 2030 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2031
769d324c
LP		 2032 return 0;
2033}
2034
2035static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2036 int r;
2037
765afd5c 2038 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2039 return 0;
2040
61233823 2041 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2042 * packet forwarding setting: either packet forwarding is on
2043 * for all, or off for all. We hence don't bother with a
2044 * per-interface setting, but simply propagate the interface
2045 * flag, if it is set, to the global flag, one-way. Note that
2046 * while IPv4 would allow a per-interface flag, we expose the
2047 * same behaviour there and also propagate the setting from
2048 * one to all, to keep things simple (see above). */
15dee3f0 2049
62e021a9 2050 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2051 if (r < 0)
765afd5c 2052 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2053
2054 return 0;
2055}
2056
49092e22 2057static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2058 IPv6PrivacyExtensions s;
49092e22
SS		 2059 int r;
2060
1f0d9695 2061 s = link_ipv6_privacy_extensions(link);
66a6bd68 2062 if (s < 0)
49092e22
SS		 2063 return 0;
2064
62e021a9 2065 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2066 if (r < 0)
49092e22
SS		 2067 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2068
2069 return 0;
2070}
2071
4f2e437a 2072static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2073 int r;
2074
2075 /* Make this a NOP if IPv6 is not available */
2076 if (!socket_ipv6_is_supported())
2077 return 0;
2078
2079 if (link->flags & IFF_LOOPBACK)
2080 return 0;
2081
d68e2e59
LP		 2082 if (!link->network)
2083 return 0;
2084
62e021a9 2085 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2086 if (r < 0)
fe307276 2087 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2088
2089 return 0;
2090}
2091
8749cbcd 2092static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2093 int r;
2094
2095 /* Make this a NOP if IPv6 is not available */
2096 if (!socket_ipv6_is_supported())
2097 return 0;
2098
2099 if (link->flags & IFF_LOOPBACK)
2100 return 0;
2101
d68e2e59
LP		 2102 if (!link->network)
2103 return 0;
2104
8749cbcd
SS		 2105 if (link->network->ipv6_dad_transmits < 0)
2106 return 0;
2107
62e021a9 2108 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2109 if (r < 0)
8749cbcd 2110 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2111
2112 return 0;
2113}
2114
b69c3180 2115static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2116 int r;
2117
2118 /* Make this a NOP if IPv6 is not available */
2119 if (!socket_ipv6_is_supported())
2120 return 0;
2121
2122 if (link->flags & IFF_LOOPBACK)
2123 return 0;
2124
d68e2e59
LP		 2125 if (!link->network)
2126 return 0;
2127
b69c3180
SS		 2128 if (link->network->ipv6_hop_limit < 0)
2129 return 0;
2130
62e021a9 2131 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2132 if (r < 0)
b69c3180 2133 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2134
2135 return 0;
2136}
2137
11102cba 2138static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2139 int r;
2140
2141 /* Make this a NOP if IPv6 is not available */
2142 if (!socket_ipv6_is_supported())
2143 return 0;
2144
2145 if (link->flags & IFF_LOOPBACK)
2146 return 0;
2147
2148 if (link->network->ipv6_mtu == 0)
2149 return 0;
2150
d236718c
DS		 2151 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
2152 * on the interface. Bump up IPv6 MTU bytes to IPV6_MTU_MIN. */
2153 if (link->network->ipv6_mtu < IPV6_MIN_MTU) {
2154 log_link_notice(link, "Bumping IPv6 MTU to "STRINGIFY(IPV6_MIN_MTU)" byte minimum required");
2155 link->network->ipv6_mtu = IPV6_MIN_MTU;
2156 }
2157
62e021a9 2158 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
d236718c
DS		 2159 if (r < 0) {
2160 if (link->mtu < link->network->ipv6_mtu)
2161 log_link_warning(link, "Cannot set IPv6 MTU %"PRIu32" higher than device MTU %"PRIu32,
2162 link->network->ipv6_mtu, link->mtu);
2163 else
2164 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2165 }
2166
2167 link->ipv6_mtu_set = true;
11102cba
SS		 2168
2169 return 0;
2170}
2171
94d76d07
YW		 2172static int link_set_ipv4_accept_local(Link *link) {
2173 int r;
2174
2175 if (link->flags & IFF_LOOPBACK)
2176 return 0;
2177
2178 if (link->network->ipv4_accept_local < 0)
2179 return 0;
2180
2181 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "accept_local", link->network->ipv4_accept_local);
2182 if (r < 0)
2183 log_link_warning_errno(link, r, "Cannot set IPv4 accept_local flag for interface: %m");
2184
2185 return 0;
2186}
2187
0917a271
DS		 2188static int link_enumerate_ipv6_tentative_addresses(Link *link) {
2189 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
2190 sd_netlink_message *addr;
2191 int r;
2192
2193 assert(link);
2194 assert(link->manager);
2195 assert(link->manager->rtnl);
2196
2197 r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_GETADDR, 0, AF_INET6);
2198 if (r < 0)
2199 return r;
2200
2201 r = sd_netlink_call(link->manager->rtnl, req, 0, &reply);
2202 if (r < 0)
2203 return r;
2204
2205 for (addr = reply; addr; addr = sd_netlink_message_next(addr)) {
2206 unsigned char flags;
2207 int ifindex;
2208
2209 r = sd_rtnl_message_addr_get_ifindex(addr, &ifindex);
2210 if (r < 0) {
2211 log_link_warning_errno(link, r, "rtnl: invalid ifindex, ignoring: %m");
2212 continue;
2213 } else if (link->ifindex != ifindex)
2214 continue;
2215
2216 r = sd_rtnl_message_addr_get_flags(addr, &flags);
2217 if (r < 0) {
2218 log_link_warning_errno(link, r, "rtnl: received address message with invalid flags, ignoring: %m");
2219 continue;
2220 } else if (!(flags & IFA_F_TENTATIVE))
2221 continue;
2222
2223 log_link_debug(link, "Found tentative ipv6 link-local address");
2224 (void) manager_rtnl_process_address(link->manager->rtnl, addr, link->manager);
2225 }
2226
2227 return 0;
2228}
2229
5e5b137a 2230static int link_drop_foreign_config(Link *link) {
5e5b137a
TG		 2231 int r;
2232
0917a271
DS		 2233 /* The kernel doesn't notify us about tentative addresses;
2234 * so if ipv6ll is disabled, we need to enumerate them now so we can drop them below */
2235 if (!link_ipv6ll_enabled(link)) {
2236 r = link_enumerate_ipv6_tentative_addresses(link);
2237 if (r < 0)
2238 return r;
2239 }
2240
f8f2f880
YW		 2241 r = link_drop_foreign_addresses(link);
2242 if (r < 0)
2243 return r;
5e5b137a 2244
59048336
YW		 2245 r = link_drop_foreign_neighbors(link);
2246 if (r < 0)
2247 return r;
d1bdafd2 2248
779804dd 2249 return link_drop_foreign_routes(link);
5e5b137a
TG		 2250}
2251
3104883d 2252static int link_drop_config(Link *link) {
3104883d
SS		 2253 int r;
2254
d7fbb9f5
YW		 2255 r = link_drop_addresses(link);
2256 if (r < 0)
2257 return r;
3104883d 2258
59048336
YW		 2259 r = link_drop_neighbors(link);
2260 if (r < 0)
2261 return r;
d1bdafd2 2262
62f0ea5f
YW		 2263 r = link_drop_routes(link);
2264 if (r < 0)
2265 return r;
3104883d 2266
c69305ff
LP		 2267 ndisc_flush(link);
2268
3104883d
SS		 2269 return 0;
2270}
2271
34658df2
YW		 2272static int link_configure_traffic_control(Link *link) {
2273 TrafficControl *tc;
02b59d57
TG		 2274 int r;
2275
34658df2
YW		 2276 link->tc_configured = false;
2277 link->tc_messages = 0;
4ecdcb07 2278
90e74a66 2279 ORDERED_HASHMAP_FOREACH(tc, link->network->tc_by_section) {
34658df2 2280 r = traffic_control_configure(link, tc);
4ecdcb07
YW		 2281 if (r < 0)
2282 return r;
2283 }
2284
34658df2
YW		 2285 if (link->tc_messages == 0)
2286 link->tc_configured = true;
4ecdcb07 2287 else
34658df2 2288 log_link_debug(link, "Configuring traffic control");
4ecdcb07
YW		 2289
2290 return 0;
2291}
2292
518cd6b5
SS		 2293static int link_configure_sr_iov(Link *link) {
2294 SRIOV *sr_iov;
518cd6b5
SS		 2295 int r;
2296
2297 link->sr_iov_configured = false;
2298 link->sr_iov_messages = 0;
2299
90e74a66 2300 ORDERED_HASHMAP_FOREACH(sr_iov, link->network->sr_iov_by_section) {
518cd6b5
SS		 2301 r = sr_iov_configure(link, sr_iov);
2302 if (r < 0)
2303 return r;
2304 }
2305
2306 if (link->sr_iov_messages == 0)
2307 link->sr_iov_configured = true;
2308 else
2309 log_link_debug(link, "Configuring SR-IOV");
2310
2311 return 0;
2312}
2313
4ecdcb07
YW		 2314static int link_configure(Link *link) {
2315 int r;
2316
ef1ba606 2317 assert(link);
b22d8a00 2318 assert(link->network);
bd08ce56 2319 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2320
34658df2 2321 r = link_configure_traffic_control(link);
4ecdcb07
YW		 2322 if (r < 0)
2323 return r;
2324
518cd6b5
SS		 2325 r = link_configure_sr_iov(link);
2326 if (r < 0)
2327 return r;
2328
500b96eb 2329 if (link->iftype == ARPHRD_CAN)
93ea7750 2330 return link_configure_can(link);
92c918b0 2331
482efedc
SS		 2332 /* If IPv6 configured that is static IPv6 address and IPv6LL autoconfiguration is enabled
2333 * for this interface, then enable IPv6 */
57ad7607 2334 (void) link_update_ipv6_sysctl(link);
482efedc 2335
23d8b221
SS		 2336 r = link_set_proxy_arp(link);
2337 if (r < 0)
2338 return r;
2339
c16b5821 2340 r = link_set_ipv6_proxy_ndp_addresses(link);
a0e5c15d
FK		 2341 if (r < 0)
2342 return r;
2343
769d324c
LP		 2344 r = link_set_ipv4_forward(link);
2345 if (r < 0)
2346 return r;
2347
2348 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2349 if (r < 0)
2350 return r;
2351
49092e22
SS		 2352 r = link_set_ipv6_privacy_extensions(link);
2353 if (r < 0)
2354 return r;
2355
4f2e437a
SS		 2356 r = link_set_ipv6_accept_ra(link);
2357 if (r < 0)
2358 return r;
2359
8749cbcd
SS		 2360 r = link_set_ipv6_dad_transmits(link);
2361 if (r < 0)
2362 return r;
b69c3180
SS		 2363
2364 r = link_set_ipv6_hop_limit(link);
2365 if (r < 0)
2366 return r;
8749cbcd 2367
94d76d07
YW		 2368 r = link_set_ipv4_accept_local(link);
2369 if (r < 0)
2370 return r;
2371
99d2baa2
SS		 2372 r = link_set_flags(link);
2373 if (r < 0)
2374 return r;
2375
89fe6535
SS		 2376 r = link_set_group(link);
2377 if (r < 0)
2378 return r;
2379
910feb78 2380 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
b22d8a00 2381 r = ipv4ll_configure(link);
eb34d4af
TG		 2382 if (r < 0)
2383 return r;
2384 }
2385
78c958f8 2386 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2387 r = dhcp4_set_promote_secondaries(link);
2388 if (r < 0)
2389 return r;
2390
3c9b8860 2391 r = dhcp4_configure(link);
eb34d4af
TG		 2392 if (r < 0)
2393 return r;
eb34d4af
TG		 2394 }
2395
62379e88
TG		 2396 if (link_dhcp6_enabled(link) ||
2397 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2398 r = dhcp6_configure(link);
2399 if (r < 0)
2400 return r;
2401 }
2402
2403 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2404 r = ndisc_configure(link);
4138fb2c
PF		 2405 if (r < 0)
2406 return r;
2407 }
2408
7465dd22
PF		 2409 if (link_radv_enabled(link)) {
2410 r = radv_configure(link);
2411 if (r < 0)
2412 return r;
2413 }
2414
8e1ad1ea 2415 if (link_lldp_rx_enabled(link)) {
7f853950 2416 r = link_lldp_rx_configure(link);
273eec24
LP		 2417 if (r < 0)
2418 return r;
ce43e484
SS		 2419 }
2420
f6fcc1c2 2421 r = link_configure_mtu(link);
40288ece
YW		 2422 if (r < 0)
2423 return r;
44b598a1 2424
9f6e82e6
YW		 2425 r = link_configure_addrgen_mode(link);
2426 if (r < 0)
2427 return r;
0e2fdb83 2428
051e77ca
SS		 2429 r = link_configure_ipv4_dad(link);
2430 if (r < 0)
2431 return r;
2432
3a390124
DS		 2433 return link_configure_continue(link);
2434}
2435
2436/* The configuration continues in this separate function, instead of
2437 * including this in the above link_configure() function, for two
2438 * reasons:
2439 * 1) some devices reset the link when the mtu is set, which caused
2440 * an infinite loop here in networkd; see:
2441 * https://github.com/systemd/systemd/issues/6593
2442 * https://github.com/systemd/systemd/issues/9831
2443 * 2) if ipv6ll is disabled, then bringing the interface up must be
2444 * delayed until after we get confirmation from the kernel that
2445 * the addr_gen_mode parameter has been set (via netlink), see:
2446 * https://github.com/systemd/systemd/issues/13882
2447 */
2448static int link_configure_continue(Link *link) {
55dc8c4a
YW		 2449 int r;
2450
2451 assert(link);
2452 assert(link->network);
bd08ce56 2453 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a 2454
9524014e 2455 if (link->setting_mtu || link->setting_genmode)
55dc8c4a
YW		 2456 return 0;
2457
4c649652
DS		 2458 /* Drop foreign config, but ignore loopback or critical devices.
2459 * We do not want to remove loopback address or addresses used for root NFS. */
2460 if (!(link->flags & IFF_LOOPBACK) &&
2461 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
2462 r = link_drop_foreign_config(link);
2463 if (r < 0)
2464 return r;
2465 }
2466
d236718c
DS		 2467 /* The kernel resets ipv6 mtu after changing device mtu;
2468 * we must set this here, after we've set device mtu */
2469 r = link_set_ipv6_mtu(link);
2470 if (r < 0)
2471 return r;
2472
dad2d78e 2473 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2474 r = link_acquire_conf(link);
2475 if (r < 0)
2476 return r;
cc544d5f 2477 }
1e9be60b 2478
3f265037 2479 return link_enter_join_netdev(link);
505f8da7
TG		 2480}
2481
27dfc982
YW		 2482static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2483 assert(duid);
2484
2485 if (duid->raw_data_len > 0)
2486 return 0;
2487
2488 if (duid->type != DUID_TYPE_UUID)
2489 return -EINVAL;
2490
2491 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2492 duid->raw_data_len = sizeof(sd_id128_t);
2493
2494 return 1;
2495}
2496
2497int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2498 Manager *manager = userdata;
2499 const sd_bus_error *e;
2500 const void *a;
2501 size_t sz;
2502 DUID *duid;
2503 Link *link;
2504 int r;
2505
2506 assert(m);
2507 assert(manager);
2508
2509 e = sd_bus_message_get_error(m);
2510 if (e) {
2511 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 2512 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 2513 e->message);
2514 goto configure;
2515 }
2516
2517 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2518 if (r < 0)
2519 goto configure;
2520
2521 if (sz != sizeof(sd_id128_t)) {
ab4dd984 2522 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 2523 goto configure;
2524 }
2525
2526 memcpy(&manager->product_uuid, a, sz);
2527 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2528 (void) duid_set_uuid(duid, manager->product_uuid);
2529
2530 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2531
2532configure:
2533 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3dc2e7af
YW		 2534 link_unref(link);
2535
27dfc982
YW		 2536 r = link_configure(link);
2537 if (r < 0)
4ff296b0 2538 link_enter_failed(link);
27dfc982
YW		 2539 }
2540
2541 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
2542
2543 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2544 * even if the method fails. */
2545 manager->has_product_uuid = true;
2546
2547 return 1;
2548}
2549
2550static bool link_requires_uuid(Link *link) {
2551 const DUID *duid;
2552
2553 assert(link);
2554 assert(link->manager);
2555 assert(link->network);
2556
2557 duid = link_get_duid(link);
2558 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
2559 return false;
2560
2561 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
2562 return true;
2563
2564 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
2565 return true;
2566
2567 return false;
2568}
2569
2570static int link_configure_duid(Link *link) {
2571 Manager *m;
2572 DUID *duid;
2573 int r;
2574
2575 assert(link);
2576 assert(link->manager);
2577 assert(link->network);
2578
2579 m = link->manager;
2580 duid = link_get_duid(link);
2581
2582 if (!link_requires_uuid(link))
2583 return 1;
2584
2585 if (m->has_product_uuid) {
2586 (void) duid_set_uuid(duid, m->product_uuid);
2587 return 1;
2588 }
2589
2590 if (!m->links_requesting_uuid) {
2591 r = manager_request_product_uuid(m, link);
2592 if (r < 0) {
2593 if (r == -ENOMEM)
2594 return r;
2595
ab4dd984
ZJS		 2596 log_link_warning_errno(link, r,
2597 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 2598 return 1;
2599 }
2600 } else {
2601 r = set_put(m->links_requesting_uuid, link);
2602 if (r < 0)
2603 return log_oom();
39dbd0c7
ZJS		 2604 if (r > 0)
2605 link_ref(link);
27dfc982
YW		 2606
2607 r = set_put(m->duids_requesting_uuid, duid);
2608 if (r < 0)
2609 return log_oom();
2610 }
2611
2612 return 0;
2613}
2614
572b21d9 2615static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
ad932b15
YW		 2616 Network *network;
2617 int r;
2618
572b21d9
YW		 2619 if (m) {
2620 _cleanup_strv_free_ char **s = NULL;
2621
2622 r = sd_netlink_message_get_errno(m);
2623 if (r < 0)
2624 return r;
2625
2626 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2627 if (r < 0 && r != -ENODATA)
2628 return r;
2629
2630 strv_free_and_replace(link->alternative_names, s);
2631 }
2632
c643bda5
YW		 2633 r = network_get(link->manager, link->iftype, link->sd_device,
2634 link->ifname, link->alternative_names, link->driver,
2635 &link->mac, &link->permanent_mac,
2636 link->wlan_iftype, link->ssid, &link->bssid, &network);
ad932b15
YW		 2637 if (r == -ENOENT) {
2638 link_enter_unmanaged(link);
2639 return 0;
2640 } else if (r == 0 && network->unmanaged) {
2641 link_enter_unmanaged(link);
2642 return 0;
2643 } else if (r < 0)
2644 return r;
2645
99b8517c 2646 if (link->network == network && !force)
ad932b15
YW		 2647 return 0;
2648
2649 log_link_info(link, "Re-configuring with %s", network->filename);
2650
2651 /* Dropping old .network file */
2652 r = link_stop_clients(link, false);
572b21d9 2653 if (r < 0)
ad932b15 2654 return r;
ad932b15 2655
5ae0fb7f 2656 if (link->dhcp_server)
ad932b15
YW		 2657 (void) sd_dhcp_server_stop(link->dhcp_server);
2658
2659 r = link_drop_config(link);
2660 if (r < 0)
2661 return r;
2662
2c7b826d 2663 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
ad932b15
YW		 2664 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
2665 r = link_drop_foreign_config(link);
2666 if (r < 0)
2667 return r;
2668 }
2669
2670 link_free_carrier_maps(link);
2671 link_free_engines(link);
2672 link->network = network_unref(link->network);
2673
2674 /* Then, apply new .network file */
2675 r = network_apply(network, link);
2676 if (r < 0)
2677 return r;
2678
2679 r = link_new_carrier_maps(link);
2680 if (r < 0)
2681 return r;
2682
2683 link_set_state(link, LINK_STATE_INITIALIZED);
8ae7b8a1 2684 link_dirty(link);
ad932b15
YW		 2685
2686 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2687 * link_configure() is called later asynchronously. */
2688 r = link_configure_duid(link);
2689 if (r <= 0)
2690 return r;
2691
2692 r = link_configure(link);
2693 if (r < 0)
2694 return r;
2695
2696 return 0;
2697}
2698
572b21d9
YW		 2699static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2700 int r;
2701
2702 r = link_reconfigure_internal(link, m, false);
2703 if (r < 0)
2704 link_enter_failed(link);
2705
2706 return 1;
2707}
2708
2709static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2710 int r;
2711
2712 r = link_reconfigure_internal(link, m, true);
2713 if (r < 0)
2714 link_enter_failed(link);
2715
2716 return 1;
2717}
2718
2719int link_reconfigure(Link *link, bool force) {
2720 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2721 int r;
2722
2c0d7ed3
YW		 2723 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
2724 return 0;
2725
572b21d9
YW		 2726 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2727 link->ifindex);
2728 if (r < 0)
2729 return r;
2730
2731 r = netlink_call_async(link->manager->rtnl, NULL, req,
2732 force ? link_force_reconfigure_handler : link_reconfigure_handler,
2733 link_netlink_destroy_callback, link);
2734 if (r < 0)
2735 return r;
2736
2737 link_ref(link);
2738
2739 return 0;
2740}
2741
e6bf7774 2742static int link_initialized_and_synced(Link *link) {
505f8da7 2743 Network *network;
505f8da7
TG		 2744 int r;
2745
2746 assert(link);
2747 assert(link->ifname);
2748 assert(link->manager);
2749
bd08ce56
YW		 2750 /* We may get called either from the asynchronous netlink callback,
2751 * or directly for link_add() if running in a container. See link_add(). */
2752 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2753 return 0;
505f8da7 2754
6a7a4e4d 2755 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2756 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2757
0d4ad91d
AR		 2758 r = link_new_bound_by_list(link);
2759 if (r < 0)
2760 return r;
2761
2762 r = link_handle_bound_by_list(link);
2763 if (r < 0)
2764 return r;
2765
c4a03a56 2766 if (!link->network) {
0894cfe4 2767 r = wifi_get_info(link);
8d968fdd
YW		 2768 if (r < 0)
2769 return r;
2770
c643bda5
YW		 2771 r = network_get(link->manager, link->iftype, link->sd_device,
2772 link->ifname, link->alternative_names, link->driver,
2773 &link->mac, &link->permanent_mac,
2774 link->wlan_iftype, link->ssid, &link->bssid, &network);
c4a03a56
TG		 2775 if (r == -ENOENT) {
2776 link_enter_unmanaged(link);
4232cf04 2777 return 0;
a09dc546
DM		 2778 } else if (r == 0 && network->unmanaged) {
2779 link_enter_unmanaged(link);
2780 return 0;
c4a03a56
TG		 2781 } else if (r < 0)
2782 return r;
505f8da7 2783
c4a03a56
TG		 2784 if (link->flags & IFF_LOOPBACK) {
2785 if (network->link_local != ADDRESS_FAMILY_NO)
2786 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2787
c4a03a56
TG		 2788 if (network->dhcp != ADDRESS_FAMILY_NO)
2789 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2790
c4a03a56
TG		 2791 if (network->dhcp_server)
2792 log_link_debug(link, "Ignoring DHCP server for loopback link");
2793 }
bd2efe92 2794
7d342c03 2795 r = network_apply(network, link);
c4a03a56
TG		 2796 if (r < 0)
2797 return r;
2798 }
505f8da7 2799
0d4ad91d
AR		 2800 r = link_new_bound_to_list(link);
2801 if (r < 0)
2802 return r;
2803
27dfc982
YW		 2804 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2805 * link_configure() is called later asynchronously. */
2806 r = link_configure_duid(link);
2807 if (r <= 0)
2808 return r;
2809
a748b692
TG		 2810 r = link_configure(link);
2811 if (r < 0)
2812 return r;
2813
4232cf04 2814 return 0;
505f8da7
TG		 2815}
2816
302a796f 2817static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
572b21d9 2818 _cleanup_strv_free_ char **s = NULL;
4ff296b0
YW		 2819 int r;
2820
572b21d9
YW		 2821 r = sd_netlink_message_get_errno(m);
2822 if (r < 0) {
40681e5c 2823 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 2824 link_enter_failed(link);
2825 return 0;
2826 }
2827
2828 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2829 if (r < 0 && r != -ENODATA) {
2830 link_enter_failed(link);
2831 return 0;
2832 }
2833
2834 strv_free_and_replace(link->alternative_names, s);
2835
4ff296b0
YW		 2836 r = link_initialized_and_synced(link);
2837 if (r < 0)
2838 link_enter_failed(link);
e6bf7774
YW		 2839 return 1;
2840}
2841
51517f9e 2842int link_initialized(Link *link, sd_device *device) {
4afd3348 2843 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2844 int r;
2845
2846 assert(link);
2847 assert(link->manager);
2848 assert(link->manager->rtnl);
2849 assert(device);
2850
8434fd5c 2851 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2852 return 0;
2853
51517f9e 2854 if (link->sd_device)
679b3605
TG		 2855 return 0;
2856
79008bdd 2857 log_link_debug(link, "udev initialized link");
bd08ce56 2858 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 2859
51517f9e 2860 link->sd_device = sd_device_ref(device);
4f561e8e 2861
3c9b8860
TG		 2862 /* udev has initialized the link, but we don't know if we have yet
2863 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2864 * when it returns we know that the pending NEWLINKs have already been
2865 * processed and that we are up-to-date */
4f561e8e 2866
3c9b8860
TG		 2867 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2868 link->ifindex);
4f561e8e
TG		 2869 if (r < 0)
2870 return r;
2871
302a796f
YW		 2872 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
2873 link_netlink_destroy_callback, link);
4f561e8e
TG		 2874 if (r < 0)
2875 return r;
2876
5da8149f
TG		 2877 link_ref(link);
2878
4f561e8e
TG		 2879 return 0;
2880}
2881
c4a03a56 2882static int link_load(Link *link) {
0bc70f1d
TG		 2883 _cleanup_free_ char *network_file = NULL,
2884 *addresses = NULL,
f703cc2c 2885 *routes = NULL,
0bc70f1d
TG		 2886 *dhcp4_address = NULL,
2887 *ipv4ll_address = NULL;
2888 union in_addr_union address;
c4a03a56
TG		 2889 int r;
2890
2891 assert(link);
2892
aa8fbc74 2893 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 2894 "NETWORK_FILE", &network_file,
2895 "ADDRESSES", &addresses,
f703cc2c 2896 "ROUTES", &routes,
0bc70f1d 2897 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 2898 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 2899 if (r < 0 && r != -ENOENT)
2900 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
2901
2902 if (network_file) {
2903 Network *network;
2904 char *suffix;
2905
2906 /* drop suffix */
2907 suffix = strrchr(network_file, '.');
2908 if (!suffix) {
2909 log_link_debug(link, "Failed to get network name from %s", network_file);
2910 goto network_file_fail;
2911 }
2912 *suffix = '\0';
2913
2914 r = network_get_by_name(link->manager, basename(network_file), &network);
2915 if (r < 0) {
2916 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
2917 goto network_file_fail;
2918 }
2919
7d342c03 2920 r = network_apply(network, link);
c4a03a56
TG		 2921 if (r < 0)
2922 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
2923 }
2924
2925network_file_fail:
2926
da4d3a61
YW		 2927 r = link_deserialize_addresses(link, addresses);
2928 if (r < 0)
2929 log_link_warning_errno(link, r, "Failed to load addresses from %s, ignoring: %m", link->state_file);
74544b4e 2930
731ff05b
YW		 2931 r = link_deserialize_routes(link, routes);
2932 if (r < 0)
2933 log_link_warning_errno(link, r, "Failed to load routes from %s, ignoring: %m", link->state_file);
f703cc2c 2934
0bc70f1d
TG		 2935 if (dhcp4_address) {
2936 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
2937 if (r < 0) {
b68d26b8 2938 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 2939 goto dhcp4_address_fail;
2940 }
2941
b1c626f6 2942 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 2943 if (r < 0)
b68d26b8 2944 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d 2945
1b43e246
DS		 2946 r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0);
2947 if (r < 0)
2948 return log_link_error_errno(link, r, "Failed to attach DHCPv4 event: %m");
2949
0bc70f1d
TG		 2950 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
2951 if (r < 0)
b68d26b8 2952 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 2953 }
2954
2955dhcp4_address_fail:
2956
2957 if (ipv4ll_address) {
2958 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
2959 if (r < 0) {
b68d26b8 2960 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 2961 goto ipv4ll_address_fail;
2962 }
2963
2964 r = sd_ipv4ll_new(&link->ipv4ll);
2965 if (r < 0)
b68d26b8 2966 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d 2967
1b43e246
DS		 2968 r = sd_ipv4ll_attach_event(link->ipv4ll, NULL, 0);
2969 if (r < 0)
2970 return log_link_error_errno(link, r, "Failed to attach IPv4LL event: %m");
2971
0bc70f1d
TG		 2972 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
2973 if (r < 0)
b68d26b8 2974 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 2975 }
2976
2977ipv4ll_address_fail:
2978
c4a03a56
TG		 2979 return 0;
2980}
2981
1c4baffc 2982int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 2983 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 2984 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 2985 Link *link;
5a937ea2 2986 int r;
505f8da7
TG		 2987
2988 assert(m);
fbbeb65a 2989 assert(m->rtnl);
505f8da7
TG		 2990 assert(message);
2991 assert(ret);
2992
2993 r = link_new(m, message, ret);
2994 if (r < 0)
2995 return r;
2996
2997 link = *ret;
2998
6a7a4e4d 2999 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3000
c4a03a56
TG		 3001 r = link_load(link);
3002 if (r < 0)
3003 return r;
3004
bf331d87
YW		 3005 if (path_is_read_only_fs("/sys") <= 0) {
3006 /* udev should be around */
ae06ab10 3007 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3008 r = sd_device_new_from_device_id(&device, ifindex_str);
3009 if (r < 0) {
4d59e14f
YW		 3010 log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m");
3011 return 0;
5c416fc4 3012 }
505f8da7 3013
5a937ea2 3014 r = sd_device_get_is_initialized(device);
51517f9e 3015 if (r < 0) {
bf331d87 3016 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 3017 goto failed;
3018 }
5a937ea2 3019 if (r == 0) {
505f8da7 3020 /* not yet ready */
79008bdd 3021 log_link_debug(link, "link pending udev initialization...");
505f8da7 3022 return 0;
3c4cb064 3023 }
505f8da7 3024
299ad32d
YW		 3025 r = device_is_renaming(device);
3026 if (r < 0) {
bf331d87 3027 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 3028 goto failed;
3029 }
3030 if (r > 0) {
bf331d87 3031 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 3032 return 0;
3033 }
3034
4f561e8e
TG		 3035 r = link_initialized(link, device);
3036 if (r < 0)
5c416fc4 3037 goto failed;
4f561e8e 3038 } else {
e6bf7774 3039 r = link_initialized_and_synced(link);
4f561e8e 3040 if (r < 0)
5c416fc4 3041 goto failed;
4f561e8e 3042 }
505f8da7 3043
a748b692 3044 return 0;
5c416fc4
TG		 3045failed:
3046 link_enter_failed(link);
3047 return r;
a748b692
TG		 3048}
3049
c601ebf7 3050int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3051 int r;
3052
3053 assert(link);
3054
3055 log_link_info(link, "Gained IPv6LL");
3056
c601ebf7 3057 link->ipv6ll_address = *address;
e7ab854c
TG		 3058 link_check_ready(link);
3059
b9ea3d2e 3060 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3061 r = link_acquire_ipv6_conf(link);
3062 if (r < 0) {
3063 link_enter_failed(link);
3064 return r;
3065 }
3066 }
3067
3068 return 0;
3069}
3070
9c0a72f9
TG		 3071static int link_carrier_gained(Link *link) {
3072 int r;
3073
3074 assert(link);
3075
0894cfe4 3076 r = wifi_get_info(link);
8d968fdd
YW		 3077 if (r < 0)
3078 return r;
3079 if (r > 0) {
572b21d9
YW		 3080 r = link_reconfigure_internal(link, NULL, false);
3081 if (r < 0) {
3082 link_enter_failed(link);
8d968fdd 3083 return r;
572b21d9 3084 }
8d968fdd
YW		 3085 }
3086
b9ea3d2e 3087 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3088 r = link_acquire_conf(link);
3089 if (r < 0) {
3090 link_enter_failed(link);
3091 return r;
3092 }
6fc25497 3093
b425c3ae 3094 link_set_state(link, LINK_STATE_CONFIGURING);
682c65b0 3095 r = link_set_static_configs(link);
6fc25497
SS		 3096 if (r < 0)
3097 return r;
9c0a72f9
TG		 3098 }
3099
0d4ad91d
AR		 3100 r = link_handle_bound_by_list(link);
3101 if (r < 0)
3102 return r;
3103
1f241589
YW		 3104 if (!link->bridge_mdb_configured) {
3105 r = link_set_bridge_mdb(link);
3106 if (r < 0)
3107 return r;
3108 }
3109
3110 if (streq_ptr(link->kind, "bridge")) {
3111 Link *slave;
3112
3113 SET_FOREACH(slave, link->slaves) {
3114 if (slave->bridge_mdb_configured)
3115 continue;
3116
3117 r = link_set_bridge_mdb(slave);
3118 if (r < 0)
3119 link_enter_failed(slave);
3120 }
3121 }
3db468ea 3122
9c0a72f9
TG		 3123 return 0;
3124}
3125
3126static int link_carrier_lost(Link *link) {
3127 int r;
3128
3129 assert(link);
3130
25e992ba 3131 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3132 return 0;
3133
fbdb6605 3134 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3135 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3136 * configuration and stop the clients as well. */
97e7fb39
SS		 3137 if (link->setting_mtu)
3138 return 0;
3139
95355a28 3140 r = link_stop_clients(link, false);
9c0a72f9
TG		 3141 if (r < 0) {
3142 link_enter_failed(link);
3143 return r;
3144 }
3145
5ae0fb7f 3146 if (link->dhcp_server)
28464ae0 3147 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3148
3104883d
SS		 3149 r = link_drop_config(link);
3150 if (r < 0)
3151 return r;
3152
2c7b826d 3153 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
f258e948 3154 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3155 r = link_drop_foreign_config(link);
3156 if (r < 0)
3157 return r;
3158 }
3104883d 3159
0d4ad91d
AR		 3160 r = link_handle_bound_by_list(link);
3161 if (r < 0)
3162 return r;
3163
9c0a72f9
TG		 3164 return 0;
3165}
3166
3167int link_carrier_reset(Link *link) {
3168 int r;
3169
3170 assert(link);
3171
3172 if (link_has_carrier(link)) {
3173 r = link_carrier_lost(link);
3174 if (r < 0)
3175 return r;
3176
3177 r = link_carrier_gained(link);
3178 if (r < 0)
3179 return r;
3180
6a7a4e4d 3181 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3182 }
3183
3184 return 0;
3185}
3186
d236718c
DS		 3187/* This is called every time an interface admin state changes to up;
3188 * specifically, when IFF_UP flag changes from unset to set */
3189static int link_admin_state_up(Link *link) {
3190 int r;
3191
3192 /* We set the ipv6 mtu after the device mtu, but the kernel resets
3193 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
3194 * ipv6_mtu_set prevents this from trying to set it too early before
3195 * the link->network has been setup; we only need to reset it
3196 * here if we've already set it during normal initialization. */
3197 if (link->ipv6_mtu_set) {
3198 r = link_set_ipv6_mtu(link);
3199 if (r < 0)
3200 return r;
3201 }
3202
3203 return 0;
3204}
3205
1c4baffc 3206int link_update(Link *link, sd_netlink_message *m) {
572b21d9 3207 _cleanup_strv_free_ char **s = NULL;
c49b33ac 3208 struct ether_addr mac;
ca4e095a 3209 const char *ifname;
afe7fd56 3210 uint32_t mtu;
d236718c 3211 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 3212 int old_master, r;
22936833 3213
dd3efc09 3214 assert(link);
b8941f74 3215 assert(link->ifname);
22936833
TG		 3216 assert(m);
3217
7619683b 3218 if (link->state == LINK_STATE_LINGER) {
5238e957 3219 log_link_info(link, "Link re-added");
289e6774 3220 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3221
3222 r = link_new_carrier_maps(link);
3223 if (r < 0)
3224 return r;
7619683b
TG		 3225 }
3226
1c4baffc 3227 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3228 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3229 Manager *manager = link->manager;
b8941f74 3230
30de2b89 3231 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3232
30de2b89
YW		 3233 link_drop(link);
3234 r = link_add(manager, m, &link);
3235 if (r < 0)
3236 return r;
b8941f74
TG		 3237 }
3238
572b21d9
YW		 3239 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3240 if (r >= 0)
3241 strv_free_and_replace(link->alternative_names, s);
3242
1c4baffc 3243 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3244 if (r >= 0 && mtu > 0) {
3245 link->mtu = mtu;
4e964aa0 3246 if (link->original_mtu == 0) {
afe7fd56 3247 link->original_mtu = mtu;
6a7a4e4d 3248 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3249 }
3250
3251 if (link->dhcp_client) {
3c9b8860
TG		 3252 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3253 link->mtu);
fc95c359
YW		 3254 if (r < 0)
3255 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3256 }
7465dd22
PF		 3257
3258 if (link->radv) {
3259 r = sd_radv_set_mtu(link->radv, link->mtu);
3260 if (r < 0)
3261 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3262 }
9842de0d 3263 }
69629de9 3264
e9189a1f
TG		 3265 /* The kernel may broadcast NEWLINK messages without the MAC address
3266 set, simply ignore them. */
1c4baffc 3267 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
807667f7
YW		 3268 if (r >= 0 && memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN) != 0) {
3269
3270 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN);
3271
3272 log_link_debug(link, "Gained new MAC address: "
3273 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3274 mac.ether_addr_octet[0],
3275 mac.ether_addr_octet[1],
3276 mac.ether_addr_octet[2],
3277 mac.ether_addr_octet[3],
3278 mac.ether_addr_octet[4],
3279 mac.ether_addr_octet[5]);
3280
3281 if (link->ipv4ll) {
3282 bool restart = sd_ipv4ll_is_running(link->ipv4ll) > 0;
3283
3284 if (restart) {
3285 r = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 3286 if (r < 0)
807667f7 3287 return log_link_warning_errno(link, r, "Could not stop IPv4LL client: %m");
c49b33ac 3288 }
c49b33ac 3289
807667f7
YW		 3290 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
3291 if (r < 0)
3292 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
3293
3294 if (restart) {
3295 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d 3296 if (r < 0)
807667f7
YW		 3297 return log_link_warning_errno(link, r, "Could not restart IPv4LL client: %m");
3298 }
3299 }
3300
3301 if (link->dhcp_client) {
3302 r = sd_dhcp_client_set_mac(link->dhcp_client,
3303 (const uint8_t *) &link->mac,
3304 sizeof (link->mac),
3305 ARPHRD_ETHER);
3306 if (r < 0)
3307 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
3308
3309 r = dhcp4_set_client_identifier(link);
3310 if (r < 0)
3311 return log_link_warning_errno(link, r, "Could not set DHCP client identifier: %m");
3312 }
413708d1 3313
807667f7
YW		 3314 if (link->dhcp6_client) {
3315 const DUID* duid = link_get_duid(link);
3316 bool restart = sd_dhcp6_client_is_running(link->dhcp6_client) > 0;
3317
3318 if (restart) {
3319 r = sd_dhcp6_client_stop(link->dhcp6_client);
fff1f40c 3320 if (r < 0)
807667f7 3321 return log_link_warning_errno(link, r, "Could not stop DHCPv6 client: %m");
c49b33ac 3322 }
4138fb2c 3323
807667f7
YW		 3324 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
3325 (const uint8_t *) &link->mac,
3326 sizeof (link->mac),
3327 ARPHRD_ETHER);
3328 if (r < 0)
3329 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
8341a5c3 3330
807667f7
YW		 3331 if (link->network->iaid_set) {
3332 r = sd_dhcp6_client_set_iaid(link->dhcp6_client, link->network->iaid);
6a7a4e4d 3333 if (r < 0)
807667f7
YW		 3334 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3335 }
3336
3337 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3338 duid->type,
3339 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3340 duid->raw_data_len);
3341 if (r < 0)
3342 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
3343
3344 if (restart) {
3345 r = sd_dhcp6_client_start(link->dhcp6_client);
413708d1 3346 if (r < 0)
807667f7 3347 return log_link_warning_errno(link, r, "Could not restart DHCPv6 client: %m");
4138fb2c 3348 }
807667f7 3349 }
7465dd22 3350
807667f7
YW		 3351 if (link->radv) {
3352 bool restart = sd_radv_is_running(link->radv);
3353
3354 if (restart) {
3355 r = sd_radv_stop(link->radv);
7465dd22 3356 if (r < 0)
807667f7 3357 return log_link_warning_errno(link, r, "Could not stop Router Advertisement: %m");
7465dd22 3358 }
420d2058 3359
807667f7
YW		 3360 r = sd_radv_set_mac(link->radv, &link->mac);
3361 if (r < 0)
3362 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3363
3364 if (restart) {
3365 r = sd_radv_start(link->radv);
420d2058 3366 if (r < 0)
807667f7 3367 return log_link_warning_errno(link, r, "Could not restart Router Advertisement: %m");
420d2058 3368 }
c49b33ac 3369 }
807667f7
YW		 3370
3371 if (link->ndisc) {
3372 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3373 if (r < 0)
3374 return log_link_warning_errno(link, r, "Could not update MAC for NDisc: %m");
3375 }
4f882b2a
TG		 3376 }
3377
bb262ef0
YW		 3378 old_master = link->master_ifindex;
3379 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
3380
d236718c 3381 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 3382 had_carrier = link_has_carrier(link);
3383
bb262ef0 3384 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 3385 if (r < 0)
3386 return r;
3387
d236718c
DS		 3388 if (!link_was_admin_up && (link->flags & IFF_UP)) {
3389 log_link_info(link, "Link UP");
3390
3391 r = link_admin_state_up(link);
3392 if (r < 0)
3393 return r;
3394 } else if (link_was_admin_up && !(link->flags & IFF_UP))
3395 log_link_info(link, "Link DOWN");
3396
273eec24
LP		 3397 r = link_update_lldp(link);
3398 if (r < 0)
3399 return r;
3400
a61bb41c
TG		 3401 carrier_gained = !had_carrier && link_has_carrier(link);
3402 carrier_lost = had_carrier && !link_has_carrier(link);
3403
3404 if (carrier_gained) {
6a7a4e4d 3405 log_link_info(link, "Gained carrier");
a61bb41c 3406
9c0a72f9
TG		 3407 r = link_carrier_gained(link);
3408 if (r < 0)
3409 return r;
a61bb41c 3410 } else if (carrier_lost) {
6a7a4e4d 3411 log_link_info(link, "Lost carrier");
a61bb41c 3412
9c0a72f9
TG		 3413 r = link_carrier_lost(link);
3414 if (r < 0)
a61bb41c 3415 return r;
a61bb41c
TG		 3416 }
3417
3418 return 0;
dd3efc09 3419}
fe8db0c5 3420
b295beea
LP		 3421static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3422 bool space = false;
b295beea
LP		 3423 Link *link;
3424
3425 assert(f);
3426 assert(prefix);
3427
3428 if (hashmap_isempty(h))
3429 return;
3430
0d536673 3431 fputs(prefix, f);
90e74a66 3432 HASHMAP_FOREACH(link, h) {
b295beea 3433 if (space)
0d536673 3434 fputc(' ', f);
b295beea
LP		 3435
3436 fprintf(f, "%i", link->ifindex);
3437 space = true;
3438 }
3439
0d536673 3440 fputc('\n', f);
b295beea
LP		 3441}
3442
64581765 3443static void link_save_dns(Link *link, FILE *f, struct in_addr_full **dns, unsigned n_dns, bool *space) {
dddc8d1e 3444 for (unsigned j = 0; j < n_dns; j++) {
e77bd3fd 3445 const char *str;
15761549 3446
64581765
YW		 3447 if (dns[j]->ifindex != 0 && dns[j]->ifindex != link->ifindex)
3448 continue;
3449
e77bd3fd
YW		 3450 str = in_addr_full_to_string(dns[j]);
3451 if (!str)
15761549 3452 continue;
15761549
YW		 3453
3454 if (*space)
3455 fputc(' ', f);
e77bd3fd 3456 fputs(str, f);
15761549
YW		 3457 *space = true;
3458 }
3459}
3460
d5e172d2
ZJS		 3461static void serialize_addresses(
3462 FILE *f,
3463 const char *lvalue,
3464 bool *space,
3465 char **addresses,
3466 sd_dhcp_lease *lease,
3467 bool conditional,
ddb82ec2 3468 sd_dhcp_lease_server_type what,
d5e172d2
ZJS		 3469 sd_dhcp6_lease *lease6,
3470 bool conditional6,
3471 int (*lease6_get_addr)(sd_dhcp6_lease*, const struct in6_addr**),
3472 int (*lease6_get_fqdn)(sd_dhcp6_lease*, char ***)) {
3473 int r;
3474
3475 bool _space = false;
3476 if (!space)
3477 space = &_space;
3478
3479 if (lvalue)
3480 fprintf(f, "%s=", lvalue);
3481 fputstrv(f, addresses, NULL, space);
3482
3483 if (lease && conditional) {
3484 const struct in_addr *lease_addresses;
3485
3486 r = sd_dhcp_lease_get_servers(lease, what, &lease_addresses);
3487 if (r > 0)
d8bff5cc 3488 serialize_in_addrs(f, lease_addresses, r, space, in4_addr_is_non_local);
d5e172d2
ZJS		 3489 }
3490
3491 if (lease6 && conditional6 && lease6_get_addr) {
3492 const struct in6_addr *in6_addrs;
3493
3494 r = lease6_get_addr(lease6, &in6_addrs);
d8bff5cc
ZJS		 3495 if (r > 0)
3496 serialize_in6_addrs(f, in6_addrs, r, space);
d5e172d2
ZJS		 3497 }
3498
3499 if (lease6 && conditional6 && lease6_get_fqdn) {
3500 char **in6_hosts;
3501
3502 r = lease6_get_fqdn(lease6, &in6_hosts);
3503 if (r > 0)
3504 fputstrv(f, in6_hosts, NULL, space);
3505 }
3506
3507 if (lvalue)
3508 fputc('\n', f);
3509}
3510
fe8db0c5 3511int link_save(Link *link) {
d361b373 3512 const char *admin_state, *oper_state, *carrier_state, *address_state;
68a8723c 3513 _cleanup_free_ char *temp_path = NULL;
fe8db0c5
TG		 3514 _cleanup_fclose_ FILE *f = NULL;
3515 int r;
3516
3517 assert(link);
3518 assert(link->state_file);
68a8723c 3519 assert(link->lease_file);
bbf7c048
TG		 3520 assert(link->manager);
3521
370e9930 3522 if (link->state == LINK_STATE_LINGER) {
6990fb6b 3523 (void) unlink(link->state_file);
370e9930
TG		 3524 return 0;
3525 }
3526
34437b4f
LP		 3527 link_lldp_save(link);
3528
deb2e523
TG		 3529 admin_state = link_state_to_string(link->state);
3530 assert(admin_state);
3531
e375dcde
TG		 3532 oper_state = link_operstate_to_string(link->operstate);
3533 assert(oper_state);
deb2e523 3534
ac999bf0
YW		 3535 carrier_state = link_carrier_state_to_string(link->carrier_state);
3536 assert(carrier_state);
3537
3538 address_state = link_address_state_to_string(link->address_state);
3539 assert(address_state);
3540
fe8db0c5
TG		 3541 r = fopen_temporary(link->state_file, &f, &temp_path);
3542 if (r < 0)
6a7a4e4d 3543 goto fail;
fe8db0c5 3544
5512a963 3545 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3546
3547 fprintf(f,
3548 "# This is private data. Do not parse.\n"
deb2e523 3549 "ADMIN_STATE=%s\n"
ac999bf0
YW		 3550 "OPER_STATE=%s\n"
3551 "CARRIER_STATE=%s\n"
3552 "ADDRESS_STATE=%s\n",
3553 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 3554
bcb7a07e 3555 if (link->network) {
fe0e16db
YW		 3556 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
3557 const char *dhcp_domainname = NULL, *p;
fe0e16db 3558 bool space;
07bdc70d 3559
c1a38904
MTL		 3560 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3561 yes_no(link->network->required_for_online));
3562
d5e172d2
ZJS		 3563 LinkOperationalStateRange st = link->network->required_operstate_for_online;
3564 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s%s%s\n",
3565 strempty(link_operstate_to_string(st.min)),
3566 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? ":" : "",
3567 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? strempty(link_operstate_to_string(st.max)) : "");
4ac77d63 3568
adc5b2e2
TG		 3569 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3570
d5e172d2
ZJS		 3571 /************************************************************/
3572
0d536673 3573 fputs("DNS=", f);
ea352b40 3574 space = false;
15761549 3575 if (link->n_dns != (unsigned) -1)
64581765 3576 link_save_dns(link, f, link->dns, link->n_dns, &space);
15761549 3577 else
64581765 3578 link_save_dns(link, f, link->network->dns, link->network->n_dns, &space);
d5314fff 3579
d5e172d2
ZJS		 3580 serialize_addresses(f, NULL, &space,
3581 NULL,
3582 link->dhcp_lease,
3583 link->network->dhcp_use_dns,
ddb82ec2 3584 SD_DHCP_LEASE_DNS,
1633c457 3585 link->dhcp6_lease,
d5e172d2
ZJS		 3586 link->network->dhcp6_use_dns,
3587 sd_dhcp6_lease_get_dns,
3588 NULL);
1e7a0e21 3589
a8c10331 3590 /* Make sure to flush out old entries before we use the NDisc data */
1e7a0e21
LP		 3591 ndisc_vacuum(link);
3592
b296797f 3593 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3594 NDiscRDNSS *dd;
3595
90e74a66 3596 SET_FOREACH(dd, link->ndisc_rdnss)
d8bff5cc 3597 serialize_in6_addrs(f, &dd->address, 1, &space);
299d578f
SS		 3598 }
3599
3600 fputc('\n', f);
3601
d5e172d2
ZJS		 3602 /************************************************************/
3603
3604 serialize_addresses(f, "NTP", NULL,
3605 link->ntp ?: link->network->ntp,
3606 link->dhcp_lease,
3607 link->network->dhcp_use_ntp,
ddb82ec2 3608 SD_DHCP_LEASE_NTP,
1633c457 3609 link->dhcp6_lease,
d5e172d2
ZJS		 3610 link->network->dhcp6_use_ntp,
3611 sd_dhcp6_lease_get_ntp_addrs,
3612 sd_dhcp6_lease_get_ntp_fqdn);
3613
3614 serialize_addresses(f, "SIP", NULL,
2a71d57f 3615 NULL,
d5e172d2
ZJS		 3616 link->dhcp_lease,
3617 link->network->dhcp_use_sip,
ddb82ec2 3618 SD_DHCP_LEASE_SIP,
2a71d57f 3619 NULL, false, NULL, NULL);
d5e172d2
ZJS		 3620
3621 /************************************************************/
bd8f6538 3622
b2a81c0b 3623 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3624 if (link->dhcp_lease) {
b2a81c0b 3625 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3626 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3627 }
1633c457
YW		 3628 if (link->dhcp6_lease)
3629 (void) sd_dhcp6_lease_get_domains(link->dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3630 }
3631
fe0e16db
YW		 3632 fputs("DOMAINS=", f);
3633 space = false;
90e74a66 3634 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains)
fe0e16db 3635 fputs_with_space(f, p, NULL, &space);
07bdc70d 3636
1e7a0e21 3637 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP		 3638 if (dhcp_domainname)
3639 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3640 if (dhcp_domains)
3641 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3642 if (dhcp6_domains)
3643 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 3644 }
3645
3646 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
3647 NDiscDNSSL *dd;
1e7a0e21 3648
90e74a66 3649 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 3650 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3651 }
b2a81c0b 3652
0d536673 3653 fputc('\n', f);
6192b846 3654
d5e172d2
ZJS		 3655 /************************************************************/
3656
fe0e16db
YW		 3657 fputs("ROUTE_DOMAINS=", f);
3658 space = false;
90e74a66 3659 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains)
fe0e16db 3660 fputs_with_space(f, p, NULL, &space);
b2a81c0b 3661
1e7a0e21 3662 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
1e7a0e21
LP		 3663 if (dhcp_domainname)
3664 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3665 if (dhcp_domains)
3666 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3667 if (dhcp6_domains)
3668 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 3669 }
3670
3671 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3672 NDiscDNSSL *dd;
1e7a0e21 3673
90e74a66 3674 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 3675 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3676 }
b2a81c0b 3677
0d536673 3678 fputc('\n', f);
67272d15 3679
d5e172d2
ZJS		 3680 /************************************************************/
3681
3c9b8860 3682 fprintf(f, "LLMNR=%s\n",
15761549 3683 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
d5e172d2
ZJS		 3684
3685 /************************************************************/
3686
aaa297d4 3687 fprintf(f, "MDNS=%s\n",
15761549 3688 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
15761549 3689
d5e172d2
ZJS		 3690 /************************************************************/
3691
3692 int dns_default_route =
3693 link->dns_default_route >= 0 ? link->dns_default_route :
3694 link->network->dns_default_route;
3695 if (dns_default_route >= 0)
3696 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(dns_default_route));
3697
3698 /************************************************************/
3699
3700 DnsOverTlsMode dns_over_tls_mode =
3701 link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID ? link->dns_over_tls_mode :
3702 link->network->dns_over_tls_mode;
3703 if (dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3704 fprintf(f, "DNS_OVER_TLS=%s\n", dns_over_tls_mode_to_string(dns_over_tls_mode));
3705
3706 /************************************************************/
3707
3708 DnssecMode dnssec_mode =
3709 link->dnssec_mode != _DNSSEC_MODE_INVALID ? link->dnssec_mode :
3710 link->network->dnssec_mode;
3711 if (dnssec_mode != _DNSSEC_MODE_INVALID)
3712 fprintf(f, "DNSSEC=%s\n", dnssec_mode_to_string(dnssec_mode));
3713
3714 /************************************************************/
3715
3716 Set *nta_anchors = link->dnssec_negative_trust_anchors;
3717 if (set_isempty(nta_anchors))
3718 nta_anchors = link->network->dnssec_negative_trust_anchors;
3719
3720 if (!set_isempty(nta_anchors)) {
8a516214
LP		 3721 const char *n;
3722
0d536673 3723 fputs("DNSSEC_NTA=", f);
8a516214 3724 space = false;
90e74a66 3725 SET_FOREACH(n, nta_anchors)
d390f8ef 3726 fputs_with_space(f, n, NULL, &space);
0d536673 3727 fputc('\n', f);
8a516214
LP		 3728 }
3729
d5e172d2
ZJS		 3730 /************************************************************/
3731
3b31e2b7
YW		 3732 r = link_serialize_addresses(link, f);
3733 if (r < 0)
3734 goto fail;
c1eb9872 3735
d5e172d2
ZJS		 3736 /************************************************************/
3737
56519412
YW		 3738 r = link_serialize_routes(link, f);
3739 if (r < 0)
3740 goto fail;
bcb7a07e 3741 }
7374f9d8 3742
b295beea
LP		 3743 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3744 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3745
8eb9058d 3746 if (link->dhcp_lease) {
bd91b83e 3747 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3748 if (r < 0)
c2d6bd61 3749 goto fail;
fe8db0c5 3750
7374f9d8 3751 fprintf(f,
b0e39c82
TG		 3752 "DHCP_LEASE=%s\n",
3753 link->lease_file);
deb2e523 3754 } else
6990fb6b 3755 (void) unlink(link->lease_file);
fe8db0c5 3756
0bc70f1d
TG		 3757 if (link->ipv4ll) {
3758 struct in_addr address;
3759
3760 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3761 if (r >= 0) {
0d536673 3762 fputs("IPV4LL_ADDRESS=", f);
072320ea 3763 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3764 fputc('\n', f);
0bc70f1d
TG		 3765 }
3766 }
3767
7e738e7b
SS		 3768 if (link->dhcp6_client) {
3769 _cleanup_free_ char *duid = NULL;
3770 uint32_t iaid;
3771
3772 r = sd_dhcp6_client_get_iaid(link->dhcp6_client, &iaid);
3773 if (r >= 0)
3774 fprintf(f, "DHCP6_CLIENT_IAID=0x%x\n", iaid);
3775
3776 r = sd_dhcp6_client_duid_as_string(link->dhcp6_client, &duid);
3777 if (r >= 0)
3778 fprintf(f, "DHCP6_CLIENT_DUID=%s\n", duid);
3779 }
18d8a2cf 3780
c2d6bd61
LP		 3781 r = fflush_and_check(f);
3782 if (r < 0)
3783 goto fail;
fe8db0c5 3784
c2d6bd61 3785 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3786 r = -errno;
c2d6bd61 3787 goto fail;
fe8db0c5
TG		 3788 }
3789
c2d6bd61 3790 return 0;
dacd6cee 3791
c2d6bd61 3792fail:
6a7a4e4d 3793 (void) unlink(link->state_file);
6a7a4e4d
LP		 3794 if (temp_path)
3795 (void) unlink(temp_path);
3796
dacd6cee 3797 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3798}
3799
84de38c5
TG		 3800/* The serialized state in /run is no longer up-to-date. */
3801void link_dirty(Link *link) {
3802 int r;
3803
3804 assert(link);
3805
0c241a37
SS		 3806 /* mark manager dirty as link is dirty */
3807 manager_dirty(link->manager);
3808
de7fef4b 3809 r = set_ensure_put(&link->manager->dirty_links, NULL, link);
0c241a37 3810 if (r <= 0)
de7fef4b 3811 /* Ignore allocation errors and don't take another ref if the link was already dirty */
84de38c5 3812 return;
84de38c5
TG		 3813 link_ref(link);
3814}
3815
3816/* The serialized state in /run is up-to-date */
3817void link_clean(Link *link) {
3818 assert(link);
3819 assert(link->manager);
3820
1046bf9b 3821 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 3822}
3823
c2a65950
YW		 3824int link_save_and_clean(Link *link) {
3825 int r;
3826
3827 r = link_save(link);
3828 if (r < 0)
3829 return r;
3830
3831 link_clean(link);
3832 return 0;
3833}
3834
fe8db0c5 3835static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3836 [LINK_STATE_PENDING] = "pending",
bd08ce56 3837 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 3838 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 3839 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3840 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3841 [LINK_STATE_FAILED] = "failed",
370e9930 3842 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3843};
3844
3845DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
5ecb131d
YW		 3846
3847int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg) {
3848 const char *err_msg = NULL;
3849
3850 (void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg);
d157714b
YW		 3851 return log_link_full_errno(link, level, err,
3852 "%s: %s%s%s%m",
3853 msg,
3854 strempty(err_msg),
3855 err_msg && !endswith(err_msg, ".") ? "." : "",
3856 err_msg ? " " : "");
5ecb131d 3857}
Unnamed repository; edit this file 'description' to name the repository.