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network: move link_radv_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
6f7a17ff 138bool link_ip_forward_enabled(Link *link, int family) {
b9d74c40 139 assert(link);
6f7a17ff 140 assert(IN_SET(family, AF_INET, AF_INET6));
b9d74c40 141
6f7a17ff 142 if (family == AF_INET6 && !socket_ipv6_is_supported())
765afd5c
LP		 143 return false;
144
769d324c
LP		 145 if (link->flags & IFF_LOOPBACK)
146 return false;
147
148 if (!link->network)
149 return false;
150
6f7a17ff 151 return link->network->ip_forward & (family == AF_INET ? ADDRESS_FAMILY_IPV4 : ADDRESS_FAMILY_IPV6);
5a8bcb67
LP		 152}
153
23d8b221
SS		 154static bool link_proxy_arp_enabled(Link *link) {
155 assert(link);
156
157 if (link->flags & IFF_LOOPBACK)
158 return false;
159
160 if (!link->network)
161 return false;
162
163 if (link->network->proxy_arp < 0)
164 return false;
165
166 return true;
167}
168
1f0d9695 169static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 170 assert(link);
d68e2e59
LP		 171
172 if (!socket_ipv6_is_supported())
173 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
174
49092e22 175 if (link->flags & IFF_LOOPBACK)
1f0d9695 176 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 177
178 if (!link->network)
1f0d9695 179 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 180
181 return link->network->ipv6_privacy_extensions;
182}
183
57ad7607 184static int link_update_ipv6_sysctl(Link *link) {
482efedc 185 bool enabled;
439689c6
SS		 186 int r;
187
188 if (link->flags & IFF_LOOPBACK)
189 return 0;
190
482efedc
SS		 191 enabled = link_ipv6_enabled(link);
192 if (enabled) {
193 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", false);
194 if (r < 0)
57ad7607
ZJS		 195 return log_link_warning_errno(link, r, "Cannot enable IPv6: %m");
196
197 log_link_info(link, "IPv6 successfully enabled");
482efedc 198 }
439689c6
SS		 199
200 return 0;
201}
202
34bf3c00
YW		 203static bool link_is_enslaved(Link *link) {
204 if (link->flags & IFF_SLAVE)
205 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
206 return true;
207
34bf3c00
YW		 208 if (!link->network)
209 return false;
210
bb262ef0 211 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 212 return true;
213
bb262ef0
YW		 214 /* TODO: add conditions for other netdevs. */
215
34bf3c00
YW		 216 return false;
217}
218
45e11abf
YW		 219static void link_update_master_operstate(Link *link, NetDev *netdev) {
220 Link *master;
221
222 if (!netdev)
223 return;
224
7936917e
YW		 225 if (netdev->ifindex <= 0)
226 return;
227
45e11abf
YW		 228 if (link_get(link->manager, netdev->ifindex, &master) < 0)
229 return;
230
231 link_update_operstate(master, true);
232}
233
234void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 235 LinkOperationalState operstate;
1678fbb3
YW		 236 LinkCarrierState carrier_state;
237 LinkAddressState address_state;
35c5a9ca 238 _cleanup_strv_free_ char **p = NULL;
1678fbb3 239 uint8_t scope = RT_SCOPE_NOWHERE;
35c5a9ca 240 bool changed = false;
1678fbb3 241 Address *address;
14153d1b 242
84de38c5
TG		 243 assert(link);
244
245 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 246 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 247 else if (link_has_carrier(link)) {
1678fbb3
YW		 248 if (link_is_enslaved(link))
249 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 250 else
1678fbb3 251 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 252 } else if (link->flags & IFF_UP)
1678fbb3 253 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 254 else
1678fbb3 255 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 256
1678fbb3 257 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 258 Link *slave;
259
90e74a66 260 SET_FOREACH(slave, link->slaves) {
959f65d3 261 link_update_operstate(slave, false);
84de38c5 262
1678fbb3
YW		 263 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
264 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 265 }
959f65d3 266 }
84de38c5 267
90e74a66 268 SET_FOREACH(address, link->addresses) {
1678fbb3
YW		 269 if (!address_is_ready(address))
270 continue;
84de38c5 271
1678fbb3
YW		 272 if (address->scope < scope)
273 scope = address->scope;
274 }
84de38c5 275
1678fbb3 276 /* for operstate we also take foreign addresses into account */
90e74a66 277 SET_FOREACH(address, link->addresses_foreign) {
1678fbb3
YW		 278 if (!address_is_ready(address))
279 continue;
280
281 if (address->scope < scope)
282 scope = address->scope;
283 }
284
285 if (scope < RT_SCOPE_SITE)
286 /* universally accessible addresses found */
287 address_state = LINK_ADDRESS_STATE_ROUTABLE;
288 else if (scope < RT_SCOPE_HOST)
289 /* only link or site local addresses found */
290 address_state = LINK_ADDRESS_STATE_DEGRADED;
84de38c5 291 else
1678fbb3
YW		 292 /* no useful addresses found */
293 address_state = LINK_ADDRESS_STATE_OFF;
294
295 /* Mapping of address and carrier state vs operational state
296 * carrier state
297 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
298 * ------------------------------------------------------------------------------
299 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
300 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
301 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
302 */
84de38c5 303
1678fbb3
YW		 304 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
305 operstate = (LinkOperationalState) carrier_state;
306 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
307 operstate = LINK_OPERSTATE_ROUTABLE;
308 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
309 operstate = LINK_OPERSTATE_DEGRADED;
310 else
14153d1b
YW		 311 operstate = LINK_OPERSTATE_ENSLAVED;
312
35c5a9ca
YW		 313 if (link->carrier_state != carrier_state) {
314 link->carrier_state = carrier_state;
315 changed = true;
316 if (strv_extend(&p, "CarrierState") < 0)
317 log_oom();
318 }
959f65d3 319
35c5a9ca
YW		 320 if (link->address_state != address_state) {
321 link->address_state = address_state;
322 changed = true;
323 if (strv_extend(&p, "AddressState") < 0)
324 log_oom();
959f65d3
YW		 325 }
326
84de38c5
TG		 327 if (link->operstate != operstate) {
328 link->operstate = operstate;
35c5a9ca
YW		 329 changed = true;
330 if (strv_extend(&p, "OperationalState") < 0)
331 log_oom();
84de38c5 332 }
959f65d3 333
35c5a9ca
YW		 334 if (p)
335 link_send_changed_strv(link, p);
336 if (changed)
337 link_dirty(link);
338
45e11abf
YW		 339 if (also_update_master && link->network) {
340 link_update_master_operstate(link, link->network->bond);
341 link_update_master_operstate(link, link->network->bridge);
959f65d3 342 }
84de38c5
TG		 343}
344
51d18171
TG		 345#define FLAG_STRING(string, flag, old, new) \
346 (((old ^ new) & flag) \
347 ? ((old & flag) ? (" -" string) : (" +" string)) \
348 : "")
349
bb262ef0 350static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 351 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
352 uint8_t operstate;
353 int r;
354
355 assert(link);
356
357 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 358 if (r < 0)
359 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 360
1c4baffc 361 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 362 if (r < 0)
363 /* if we got a message without operstate, take it to mean
364 the state was unchanged */
365 operstate = link->kernel_operstate;
366
bb262ef0 367 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 368 return 0;
369
370 if (link->flags != flags) {
6a7a4e4d 371 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		 372 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
373 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
374 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
375 FLAG_STRING("UP", IFF_UP, link->flags, flags),
376 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
377 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
378 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
379 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
380 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
381 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
382 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
383 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
384 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
385 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
386 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
387 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
388 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
389 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
390 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
391
392 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
393 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
394 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
395 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
396 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
397 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
398 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
399 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
400
401 /* link flags are currently at most 18 bits, let's align to
402 * printing 20 */
403 if (unknown_flags_added)
79008bdd 404 log_link_debug(link,
6a7a4e4d 405 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 406 unknown_flags_added);
407
408 if (unknown_flags_removed)
79008bdd 409 log_link_debug(link,
6a7a4e4d 410 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 411 unknown_flags_removed);
412 }
413
414 link->flags = flags;
415 link->kernel_operstate = operstate;
416
959f65d3 417 link_update_operstate(link, true);
51d18171
TG		 418
419 return 0;
420}
421
1c4baffc 422static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 423 _cleanup_(link_unrefp) Link *link = NULL;
6cad256d 424 const char *ifname, *kind = NULL;
b710e6b6 425 unsigned short iftype;
572b21d9
YW		 426 int r, ifindex;
427 uint16_t type;
f579559b 428
0c2f9b84 429 assert(manager);
505f8da7 430 assert(message);
f579559b
TG		 431 assert(ret);
432
6cad256d
TJ		 433 /* check for link kind */
434 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
435 if (r == 0) {
db2f8a2e 436 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 437 r = sd_netlink_message_exit_container(message);
438 if (r < 0)
439 return r;
440 }
441
1c4baffc 442 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 443 if (r < 0)
444 return r;
445 else if (type != RTM_NEWLINK)
446 return -EINVAL;
447
448 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
449 if (r < 0)
450 return r;
451 else if (ifindex <= 0)
452 return -EINVAL;
453
b710e6b6
LP		 454 r = sd_rtnl_message_link_get_type(message, &iftype);
455 if (r < 0)
456 return r;
457
1c4baffc 458 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 459 if (r < 0)
460 return r;
461
17f9c355 462 link = new(Link, 1);
f579559b
TG		 463 if (!link)
464 return -ENOMEM;
465
17f9c355
YW		 466 *link = (Link) {
467 .n_ref = 1,
468 .manager = manager,
469 .state = LINK_STATE_PENDING,
17f9c355
YW		 470 .ifindex = ifindex,
471 .iftype = iftype,
15761549
YW		 472
473 .n_dns = (unsigned) -1,
474 .dns_default_route = -1,
475 .llmnr = _RESOLVE_SUPPORT_INVALID,
476 .mdns = _RESOLVE_SUPPORT_INVALID,
477 .dnssec_mode = _DNSSEC_MODE_INVALID,
478 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
17f9c355
YW		 479 };
480
505f8da7
TG		 481 link->ifname = strdup(ifname);
482 if (!link->ifname)
483 return -ENOMEM;
f579559b 484
6cad256d
TJ		 485 if (kind) {
486 link->kind = strdup(kind);
487 if (!link->kind)
488 return -ENOMEM;
489 }
490
cbff7170
TJ		 491 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
492 if (r < 0)
493 log_link_debug_errno(link, r, "New device has no master, continuing without");
494
1c4baffc 495 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 496 if (r < 0)
34437b4f 497 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 498
c643bda5 499 r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac);
4bb7cc82
YW		 500 if (r < 0)
501 log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
502
c643bda5
YW		 503 r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver);
504 if (r < 0)
505 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
506
572b21d9
YW		 507 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &link->alternative_names);
508 if (r < 0 && r != -ENODATA)
509 return r;
510
34437b4f 511 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 512 return -ENOMEM;
fe8db0c5 513
34437b4f 514 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 515 return -ENOMEM;
516
34437b4f 517 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 518 return -ENOMEM;
519
d5099efc 520 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 521 if (r < 0)
522 return r;
523
524 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 525 if (r < 0)
526 return r;
527
bb262ef0 528 r = link_update_flags(link, message, false);
51d18171
TG		 529 if (r < 0)
530 return r;
531
1cc6c93a 532 *ret = TAKE_PTR(link);
f579559b
TG		 533
534 return 0;
535}
536
15761549
YW		 537void link_ntp_settings_clear(Link *link) {
538 link->ntp = strv_free(link->ntp);
539}
540
541void link_dns_settings_clear(Link *link) {
e77bd3fd
YW		 542 if (link->n_dns != (unsigned) -1)
543 for (unsigned i = 0; i < link->n_dns; i++)
544 in_addr_full_free(link->dns[i]);
15761549
YW		 545 link->dns = mfree(link->dns);
546 link->n_dns = (unsigned) -1;
547
548 link->search_domains = ordered_set_free_free(link->search_domains);
549 link->route_domains = ordered_set_free_free(link->route_domains);
550
551 link->dns_default_route = -1;
552 link->llmnr = _RESOLVE_SUPPORT_INVALID;
553 link->mdns = _RESOLVE_SUPPORT_INVALID;
554 link->dnssec_mode = _DNSSEC_MODE_INVALID;
555 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
556
557 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
558}
559
1a6bb31f
YW		 560static void link_free_engines(Link *link) {
561 if (!link)
562 return;
563
564 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
565 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
566 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
1a6bb31f
YW		 567
568 link->lldp = sd_lldp_unref(link->lldp);
569
570 ndisc_flush(link);
571
572 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
573 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 574 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
1a6bb31f
YW		 575 link->ndisc = sd_ndisc_unref(link->ndisc);
576 link->radv = sd_radv_unref(link->radv);
577}
578
8301aa0b 579static Link *link_free(Link *link) {
8301aa0b 580 assert(link);
f579559b 581
15761549
YW		 582 link_ntp_settings_clear(link);
583 link_dns_settings_clear(link);
584
8eec0b9d
YW		 585 link->routes = set_free(link->routes);
586 link->routes_foreign = set_free(link->routes_foreign);
6e537f62
YW		 587 link->dhcp_routes = set_free(link->dhcp_routes);
588 link->dhcp_routes_old = set_free(link->dhcp_routes_old);
1633c457
YW		 589 link->dhcp6_routes = set_free(link->dhcp6_routes);
590 link->dhcp6_routes_old = set_free(link->dhcp6_routes_old);
591 link->dhcp6_pd_routes = set_free(link->dhcp6_pd_routes);
592 link->dhcp6_pd_routes_old = set_free(link->dhcp6_pd_routes_old);
69203fba 593 link->ndisc_routes = set_free(link->ndisc_routes);
adda1ed9 594
8eec0b9d
YW		 595 link->nexthops = set_free(link->nexthops);
596 link->nexthops_foreign = set_free(link->nexthops_foreign);
c16c7808 597
8eec0b9d
YW		 598 link->neighbors = set_free(link->neighbors);
599 link->neighbors_foreign = set_free(link->neighbors_foreign);
d1bdafd2 600
8eec0b9d
YW		 601 link->addresses = set_free(link->addresses);
602 link->addresses_foreign = set_free(link->addresses_foreign);
aa651e88 603 link->pool_addresses = set_free(link->pool_addresses);
e5526518 604 link->static_addresses = set_free(link->static_addresses);
1633c457
YW		 605 link->dhcp6_addresses = set_free(link->dhcp6_addresses);
606 link->dhcp6_addresses_old = set_free(link->dhcp6_addresses_old);
607 link->dhcp6_pd_addresses = set_free(link->dhcp6_pd_addresses);
608 link->dhcp6_pd_addresses_old = set_free(link->dhcp6_pd_addresses_old);
69203fba 609 link->ndisc_addresses = set_free(link->ndisc_addresses);
adda1ed9 610
7272b25e 611 link_lldp_emit_stop(link);
1a6bb31f 612 link_free_engines(link);
68a8723c 613 free(link->lease_file);
49699bac
SS		 614 free(link->lldp_file);
615
c166a070 616 free(link->ifname);
572b21d9 617 strv_free(link->alternative_names);
ceac4078 618 free(link->kind);
8d968fdd 619 free(link->ssid);
c643bda5 620 free(link->driver);
6cad256d 621
db2f8a2e 622 (void) unlink(link->state_file);
fe8db0c5 623 free(link->state_file);
c166a070 624
51517f9e 625 sd_device_unref(link->sd_device);
b5db00e5 626
0d4ad91d 627 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 628 hashmap_free(link->bound_by_links);
629
5f707e12 630 set_free_with_destructor(link->slaves, link_unref);
033295c1 631
c9c908a6
YW		 632 network_unref(link->network);
633
8301aa0b 634 return mfree(link);
14b746f7
TG		 635}
636
8301aa0b 637DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 638
11a7f229
TG		 639int link_get(Manager *m, int ifindex, Link **ret) {
640 Link *link;
11a7f229
TG		 641
642 assert(m);
e856ed00 643 assert(ifindex > 0);
11a7f229
TG		 644 assert(ret);
645
ae06ab10 646 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 647 if (!link)
648 return -ENODEV;
649
650 *ret = link;
651
652 return 0;
653}
654
af9ba57a 655void link_set_state(Link *link, LinkState state) {
e331e246
TG		 656 assert(link);
657
658 if (link->state == state)
659 return;
660
0beb9542
YW		 661 log_link_debug(link, "State changed: %s -> %s",
662 link_state_to_string(link->state),
663 link_state_to_string(state));
664
e331e246
TG		 665 link->state = state;
666
667 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 668}
669
57bd6899
TG		 670static void link_enter_unmanaged(Link *link) {
671 assert(link);
672
e331e246 673 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 674
84de38c5 675 link_dirty(link);
57bd6899
TG		 676}
677
95355a28 678int link_stop_clients(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 679 int r = 0, k;
680
681 assert(link);
682 assert(link->manager);
683 assert(link->manager->event);
684
80060352
ZJS		 685 bool keep_dhcp = may_keep_dhcp &&
686 link->network &&
687 (link->manager->restarting ||
688 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
689
690 if (link->dhcp_client && !keep_dhcp) {
111bb8f9 691 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 692 if (k < 0)
36c7d709 693 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 694 }
695
ba179154 696 if (link->ipv4ll) {
111bb8f9 697 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 698 if (k < 0)
36c7d709 699 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 700 }
701
2488e4d9
YW		 702 k = link_stop_ipv4_dad(link);
703 if (k < 0)
704 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
051e77ca 705
f5a8c43f
TG		 706 if (link->dhcp6_client) {
707 k = sd_dhcp6_client_stop(link->dhcp6_client);
708 if (k < 0)
36c7d709 709 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 710 }
4138fb2c 711
1633c457
YW		 712 if (link_dhcp6_pd_is_enabled(link)) {
713 k = dhcp6_pd_remove(link);
714 if (k < 0)
715 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
716 }
717
1e7a0e21
LP		 718 if (link->ndisc) {
719 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 720 if (k < 0)
36c7d709 721 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 722 }
723
7465dd22 724 if (link->radv) {
290696e5 725 k = sd_radv_stop(link->radv);
7465dd22
PF		 726 if (k < 0)
727 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
728 }
729
7272b25e 730 link_lldp_emit_stop(link);
111bb8f9
TG		 731 return r;
732}
733
b22d8a00 734void link_enter_failed(Link *link) {
ef1ba606 735 assert(link);
f882c247 736
370e9930 737 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 738 return;
739
6a7a4e4d 740 log_link_warning(link, "Failed");
449f7554 741
e331e246 742 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 743
95355a28 744 link_stop_clients(link, false);
111bb8f9 745
84de38c5 746 link_dirty(link);
f882c247
TG		 747}
748
7033af49
YW		 749static int link_join_netdevs_after_configured(Link *link) {
750 NetDev *netdev;
7033af49
YW		 751 int r;
752
90e74a66 753 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7033af49
YW		 754 if (netdev->ifindex > 0)
755 /* Assume already enslaved. */
756 continue;
757
758 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
759 continue;
760
761 log_struct(LOG_DEBUG,
762 LOG_LINK_INTERFACE(link),
763 LOG_NETDEV_INTERFACE(netdev),
764 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
765
766 r = netdev_join(netdev, link, NULL);
767 if (r < 0)
768 return log_struct_errno(LOG_WARNING, r,
769 LOG_LINK_INTERFACE(link),
770 LOG_NETDEV_INTERFACE(netdev),
771 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
772 }
773
774 return 0;
775}
776
e3a7b048 777static void link_enter_configured(Link *link) {
dd43110f
TG		 778 assert(link);
779 assert(link->network);
e3a7b048 780
289e6774 781 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 782 return;
dd43110f 783
e331e246 784 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 785
7033af49
YW		 786 (void) link_join_netdevs_after_configured(link);
787
84de38c5 788 link_dirty(link);
dd43110f
TG		 789}
790
6accfd31
DA		 791void link_check_ready(Link *link) {
792 Address *a;
6accfd31
DA		 793
794 assert(link);
795
5f58af25
YW		 796 if (link->state == LINK_STATE_CONFIGURED)
797 return;
798
799 if (link->state != LINK_STATE_CONFIGURING) {
800 log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31 801 return;
39373cb9 802 }
6accfd31
DA		 803
804 if (!link->network)
805 return;
806
39373cb9
YW		 807 if (!link->addresses_configured) {
808 log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 809 return;
39373cb9 810 }
6accfd31 811
39373cb9
YW		 812 if (!link->neighbors_configured) {
813 log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
6accfd31 814 return;
39373cb9 815 }
6accfd31 816
90e74a66 817 SET_FOREACH(a, link->addresses)
39373cb9
YW		 818 if (!address_is_ready(a)) {
819 _cleanup_free_ char *str = NULL;
820
821 (void) in_addr_to_string(a->family, &a->in_addr, &str);
822 log_link_debug(link, "%s(): an address %s/%d is not ready.", __func__, strnull(str), a->prefixlen);
6aa5773b 823 return;
39373cb9 824 }
6aa5773b 825
39373cb9
YW		 826 if (!link->static_routes_configured) {
827 log_link_debug(link, "%s(): static routes are not configured.", __func__);
6accfd31 828 return;
39373cb9 829 }
6accfd31 830
39373cb9
YW		 831 if (!link->static_nexthops_configured) {
832 log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 833 return;
39373cb9 834 }
c16c7808 835
39373cb9
YW		 836 if (!link->routing_policy_rules_configured) {
837 log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 838 return;
39373cb9 839 }
6accfd31 840
39373cb9
YW		 841 if (!link->tc_configured) {
842 log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
4ecdcb07 843 return;
39373cb9 844 }
4ecdcb07 845
39373cb9
YW		 846 if (!link->sr_iov_configured) {
847 log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 848 return;
39373cb9 849 }
518cd6b5 850
1f241589
YW		 851 if (!link->bridge_mdb_configured) {
852 log_link_debug(link, "%s(): Bridge MDB is not configured.", __func__);
853 return;
854 }
855
463797c1 856 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
50550722
YW		 857 bool has_ndisc_address = false;
858 NDiscAddress *n;
6accfd31 859
1c09d84e 860 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !link->ipv4ll_address_configured) {
39373cb9 861 log_link_debug(link, "%s(): IPv4LL is not configured.", __func__);
463797c1 862 return;
39373cb9 863 }
6accfd31 864
463797c1 865 if (link_ipv6ll_enabled(link) &&
39373cb9
YW		 866 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
867 log_link_debug(link, "%s(): IPv6LL is not configured.", __func__);
463797c1 868 return;
39373cb9 869 }
6accfd31 870
90e74a66 871 SET_FOREACH(n, link->ndisc_addresses)
50550722
YW		 872 if (!n->marked) {
873 has_ndisc_address = true;
874 break;
875 }
876
15797d6a 877 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
50550722 878 !link->dhcp_address && set_isempty(link->dhcp6_addresses) && !has_ndisc_address &&
15797d6a
YW		 879 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
880 log_link_debug(link, "%s(): DHCP4 or DHCP6 is enabled but no dynamic address is assigned yet.", __func__);
659ad3a0
YW		 881 return;
882 }
883
1633c457 884 if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_dhcp6_pd_is_enabled(link) || link_ipv6_accept_ra_enabled(link)) {
39373cb9
YW		 885 if (!link->dhcp4_configured &&
886 !(link->dhcp6_address_configured && link->dhcp6_route_configured) &&
887 !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) &&
d98c546d 888 !(link->ndisc_addresses_configured && link->ndisc_routes_configured) &&
1c09d84e 889 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
39373cb9
YW		 890 /* When DHCP or RA is enabled, at least one protocol must provide an address, or
891 * an IPv4ll fallback address must be configured. */
892 log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
893 return;
894 }
895
d98c546d 896 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		 897 __func__,
898 yes_no(link->dhcp4_configured),
899 yes_no(link->dhcp6_address_configured),
900 yes_no(link->dhcp6_route_configured),
901 yes_no(link->dhcp6_pd_address_configured),
902 yes_no(link->dhcp6_pd_route_configured),
d98c546d
YW		 903 yes_no(link->ndisc_addresses_configured),
904 yes_no(link->ndisc_routes_configured));
39373cb9 905 }
463797c1 906 }
6accfd31 907
5f58af25 908 link_enter_configured(link);
6accfd31
DA		 909
910 return;
911}
912
682c65b0 913static int link_set_static_configs(Link *link) {
f882c247
TG		 914 int r;
915
916 assert(link);
917 assert(link->network);
f5be5601 918 assert(link->state != _LINK_STATE_INVALID);
f882c247 919
2428613f 920 /* Reset all *_configured flags we are configuring. */
9b966cee 921 link->request_static_addresses = false;
2428613f 922 link->addresses_configured = false;
6aa5773b 923 link->addresses_ready = false;
2428613f
YW		 924 link->neighbors_configured = false;
925 link->static_routes_configured = false;
c16c7808 926 link->static_nexthops_configured = false;
2428613f
YW		 927 link->routing_policy_rules_configured = false;
928
f6bb7ac5
TJ		 929 r = link_set_bridge_fdb(link);
930 if (r < 0)
931 return r;
932
1f241589
YW		 933 r = link_set_bridge_mdb(link);
934 if (r < 0)
935 return r;
936
58f1fe9a 937 r = link_set_neighbors(link);
f3ef324d
YW		 938 if (r < 0)
939 return r;
e4a71bf3 940
682c65b0
YW		 941 r = link_set_addresses(link);
942 if (r < 0)
943 return r;
bd6379ec 944
fe2bc17c
YW		 945 r = link_set_address_labels(link);
946 if (r < 0)
947 return r;
f882c247 948
e5526518 949 /* now that we can figure out a default address for the dhcp server, start it */
5ae0fb7f
YW		 950 r = dhcp4_server_configure(link);
951 if (r < 0)
952 return r;
d4cdbea5 953
f882c247
TG		 954 return 0;
955}
956
13b498f9 957static int link_set_bridge_vlan(Link *link) {
86e2be7b 958 int r;
13b498f9
TJ		 959
960 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
961 if (r < 0)
962 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
963
964 return r;
965}
966
a60a720c 967static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 968 int r;
969
970 if (!link_proxy_arp_enabled(link))
971 return 0;
972
62e021a9 973 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 974 if (r < 0)
975 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
976
977 return 0;
978}
979
3a390124 980static int link_configure_continue(Link *link);
55dc8c4a 981
302a796f 982static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 983 int r;
984
985 assert(m);
986 assert(link);
987 assert(link->ifname);
988
55dc8c4a
YW		 989 link->setting_mtu = false;
990
5da8149f 991 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 992 return 1;
993
1c4baffc 994 r = sd_netlink_message_get_errno(m);
4ff296b0 995 if (r < 0)
5ecb131d 996 log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring");
4ff296b0
YW		 997 else
998 log_link_debug(link, "Setting MTU done.");
55dc8c4a 999
4ff296b0 1000 if (link->state == LINK_STATE_INITIALIZED) {
3a390124 1001 r = link_configure_continue(link);
4ff296b0
YW		 1002 if (r < 0)
1003 link_enter_failed(link);
1004 }
4f882b2a
TG		 1005
1006 return 1;
1007}
1008
933c70a0 1009int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1010 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1011 int r;
1012
1013 assert(link);
1014 assert(link->manager);
1015 assert(link->manager->rtnl);
1016
40288ece
YW		 1017 if (mtu == 0 || link->setting_mtu)
1018 return 0;
1019
933c70a0 1020 if (link->mtu == mtu)
ee493106
YW		 1021 return 0;
1022
6a7a4e4d 1023 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1024
6a7a4e4d
LP		 1025 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1026 if (r < 0)
1027 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1028
44b598a1 1029 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1030 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1031 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1032
1033 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
d236718c 1034 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes");
44b598a1 1035
72c2500b 1036 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1037 }
1038
1c4baffc 1039 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1040 if (r < 0)
1041 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1042
302a796f
YW		 1043 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1044 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1045 if (r < 0)
1046 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1047
ae941762 1048 link_ref(link);
1046bf9b 1049 link->setting_mtu = true;
b226d99b 1050
4f882b2a
TG		 1051 return 0;
1052}
1053
f6fcc1c2
YW		 1054static bool link_reduces_vlan_mtu(Link *link) {
1055 /* See netif_reduces_vlan_mtu() in kernel. */
1056 return streq_ptr(link->kind, "macsec");
1057}
1058
1059static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1060 uint32_t mtu = 0;
1061 NetDev *dev;
f6fcc1c2 1062
90e74a66 1063 HASHMAP_FOREACH(dev, link->network->stacked_netdevs)
f6fcc1c2
YW		 1064 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1065 /* See vlan_dev_change_mtu() in kernel. */
1066 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1067
1068 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1069 /* See macvlan_change_mtu() in kernel. */
1070 mtu = dev->mtu;
1071
1072 return mtu;
1073}
1074
1075static int link_configure_mtu(Link *link) {
1076 uint32_t mtu;
1077
1078 assert(link);
1079 assert(link->network);
1080
1081 if (link->network->mtu > 0)
1082 return link_set_mtu(link, link->network->mtu);
1083
1084 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1085 if (link->mtu >= mtu)
1086 return 0;
1087
1088 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1089 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1090 link->mtu, mtu);
1091
1092 return link_set_mtu(link, mtu);
1093}
1094
302a796f 1095static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1096 int r;
1097
1098 assert(m);
1099 assert(link);
1100 assert(link->ifname);
1101
1102 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1103 return 1;
1104
1105 r = sd_netlink_message_get_errno(m);
1106 if (r < 0)
5ecb131d 1107 log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring");
99d2baa2
SS		 1108
1109 return 1;
1110}
1111
1112static int link_set_flags(Link *link) {
1113 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1114 unsigned ifi_change = 0;
1115 unsigned ifi_flags = 0;
1116 int r;
1117
1118 assert(link);
1119 assert(link->manager);
1120 assert(link->manager->rtnl);
1121
1122 if (link->flags & IFF_LOOPBACK)
1123 return 0;
1124
1125 if (!link->network)
1126 return 0;
1127
866e6b7a 1128 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1129 return 0;
1130
1131 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1132 if (r < 0)
1133 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1134
1135 if (link->network->arp >= 0) {
1136 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1137 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1138 }
1139
1140 if (link->network->multicast >= 0) {
1141 ifi_change |= IFF_MULTICAST;
1142 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1143 }
1144
866e6b7a
SS		 1145 if (link->network->allmulticast >= 0) {
1146 ifi_change |= IFF_ALLMULTI;
1147 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1148 }
1149
99d2baa2
SS		 1150 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1151 if (r < 0)
1152 return log_link_error_errno(link, r, "Could not set link flags: %m");
1153
302a796f
YW		 1154 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1155 link_netlink_destroy_callback, link);
99d2baa2
SS		 1156 if (r < 0)
1157 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1158
1159 link_ref(link);
1160
1161 return 0;
1162}
1163
e7ab854c
TG		 1164static int link_acquire_ipv6_conf(Link *link) {
1165 int r;
1166
1167 assert(link);
1168
e7ab854c 1169 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1170 assert(link->ndisc);
e7ab854c
TG		 1171
1172 log_link_debug(link, "Discovering IPv6 routers");
1173
1e7a0e21 1174 r = sd_ndisc_start(link->ndisc);
63348d13 1175 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1176 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1177 }
1178
086b8853 1179 if (link->radv) {
7465dd22
PF		 1180 assert(link->radv);
1181 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1182
1183 log_link_debug(link, "Starting IPv6 Router Advertisements");
1184
fd3ef936
YW		 1185 r = radv_emit_dns(link);
1186 if (r < 0)
1187 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
1188
7465dd22
PF		 1189 r = sd_radv_start(link->radv);
1190 if (r < 0 && r != -EBUSY)
1191 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1192 }
1193
838d39af
SS		 1194 if (link_dhcp6_enabled(link) && IN_SET(link->network->dhcp6_without_ra,
1195 DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST,
1196 DHCP6_CLIENT_START_MODE_SOLICIT)) {
cd305af1
SS		 1197 assert(link->dhcp6_client);
1198 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1199
838d39af 1200 r = dhcp6_request_address(link, link->network->dhcp6_without_ra == DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST);
cd305af1 1201 if (r < 0 && r != -EBUSY)
1633c457 1202 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
cd305af1
SS		 1203 else
1204 log_link_debug(link, "Acquiring DHCPv6 lease");
1205 }
1206
1633c457
YW		 1207 r = dhcp6_request_prefix_delegation(link);
1208 if (r < 0)
1209 return log_link_warning_errno(link, r, "Failed to request DHCPv6 prefix delegation: %m");
10752343 1210
e7ab854c
TG		 1211 return 0;
1212}
1213
6fc25497 1214static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1215 int r;
1216
1217 assert(link);
ff254138
TG		 1218 assert(link->manager);
1219 assert(link->manager->event);
1220
910feb78 1221 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1222 assert(link->ipv4ll);
ff254138 1223
6a7a4e4d 1224 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1225
1226 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1227 if (r < 0)
1228 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1229 }
1230
78c958f8 1231 if (link_dhcp4_enabled(link)) {
eb34d4af 1232 assert(link->dhcp_client);
ff254138 1233
6a7a4e4d 1234 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1235
5c1d3fc9 1236 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1237 if (r < 0)
1238 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1239 }
ff254138 1240
6fc25497
SS		 1241 return 0;
1242}
1243
1244static int link_acquire_conf(Link *link) {
1245 int r;
1246
1247 assert(link);
1248
1249 r = link_acquire_ipv4_conf(link);
1250 if (r < 0)
1251 return r;
1252
3f7cc080 1253 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1254 r = link_acquire_ipv6_conf(link);
1255 if (r < 0)
1256 return r;
1257 }
1258
7272b25e
LP		 1259 if (link_lldp_emit_enabled(link)) {
1260 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1261 if (r < 0)
1262 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1263 }
1264
ff254138
TG		 1265 return 0;
1266}
1267
a61bb41c 1268bool link_has_carrier(Link *link) {
deb2e523
TG		 1269 /* see Documentation/networking/operstates.txt in the kernel sources */
1270
a61bb41c 1271 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1272 return true;
1273
a61bb41c 1274 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1275 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1276 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1277 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1278 return true;
1279
1280 return false;
1281}
1282
0e2fdb83
SS		 1283static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1284 int r;
1285
1286 assert(link);
1287
9524014e
DS		 1288 link->setting_genmode = false;
1289
0e2fdb83
SS		 1290 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1291 return 1;
1292
1293 r = sd_netlink_message_get_errno(m);
1294 if (r < 0)
5ecb131d 1295 log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring");
9524014e
DS		 1296 else
1297 log_link_debug(link, "Setting address genmode done.");
1298
1299 if (link->state == LINK_STATE_INITIALIZED) {
1300 r = link_configure_continue(link);
1301 if (r < 0)
1302 link_enter_failed(link);
1303 }
0e2fdb83
SS		 1304
1305 return 1;
1306}
1307
1308static int link_configure_addrgen_mode(Link *link) {
1309 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1310 uint8_t ipv6ll_mode;
1311 int r;
1312
1313 assert(link);
1314 assert(link->network);
1315 assert(link->manager);
1316 assert(link->manager->rtnl);
1317
9524014e 1318 if (!socket_ipv6_is_supported() || link->setting_genmode)
9f6e82e6
YW		 1319 return 0;
1320
0e2fdb83
SS		 1321 log_link_debug(link, "Setting address genmode for link");
1322
1323 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1324 if (r < 0)
1325 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1326
1327 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1328 if (r < 0)
1329 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1330
1331 r = sd_netlink_message_open_container(req, AF_INET6);
1332 if (r < 0)
1333 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1334
1335 if (!link_ipv6ll_enabled(link))
1336 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
6f6296b9 1337 else if (link->network->ipv6ll_address_gen_mode < 0) {
a6f1848a
SS		 1338 r = sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL);
1339 if (r < 0) {
1340 /* The file may not exist. And even if it exists, when stable_secret is unset,
1341 * reading the file fails with EIO. */
1342 log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret: %m");
1343
1344 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1345 } else
1346 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1347 } else
6f6296b9 1348 ipv6ll_mode = link->network->ipv6ll_address_gen_mode;
0e2fdb83
SS		 1349
1350 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1351 if (r < 0)
1352 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1353
1354 r = sd_netlink_message_close_container(req);
1355 if (r < 0)
1356 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1357
1358 r = sd_netlink_message_close_container(req);
1359 if (r < 0)
1360 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1361
1362 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1363 link_netlink_destroy_callback, link);
1364 if (r < 0)
1365 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1366
1367 link_ref(link);
9524014e 1368 link->setting_genmode = true;
0e2fdb83
SS		 1369
1370 return 0;
1371}
1372
302a796f 1373static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1374 int r;
1375
1746cf2a
TG		 1376 assert(link);
1377
5da8149f 1378 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1379 return 1;
1380
1c4baffc 1381 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1382 if (r < 0)
26d6b214 1383 /* we warn but don't fail the link, as it may be brought up later */
5ecb131d 1384 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
45ad2c13 1385
f882c247
TG		 1386 return 1;
1387}
1388
1cc84f3b 1389static int link_up(Link *link) {
4afd3348 1390 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1391 int r;
1392
f882c247 1393 assert(link);
c106cc36 1394 assert(link->network);
f882c247
TG		 1395 assert(link->manager);
1396 assert(link->manager->rtnl);
1397
6a7a4e4d 1398 log_link_debug(link, "Bringing link up");
449f7554 1399
6a7a4e4d
LP		 1400 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1401 if (r < 0)
1402 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1403
2b2d8603 1404 /* set it free if not enslaved with networkd */
6cb955c6 1405 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1406 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1407 if (r < 0)
1408 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1409 }
1410
5d4795f3 1411 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1412 if (r < 0)
1413 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1414
c106cc36 1415 if (link->network->mac) {
1c4baffc 1416 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1417 if (r < 0)
1418 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1419 }
1420
302a796f
YW		 1421 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1422 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1423 if (r < 0)
1424 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1425
b226d99b
TG		 1426 link_ref(link);
1427
f882c247
TG		 1428 return 0;
1429}
1430
302a796f 1431static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1432 int r;
1433
1434 assert(link);
1435
1436 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1437 return 1;
1438
1c4baffc 1439 r = sd_netlink_message_get_errno(m);
0d4ad91d 1440 if (r < 0)
5ecb131d 1441 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
0d4ad91d
AR		 1442
1443 return 1;
1444}
1445
8e54db83 1446int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1447 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1448 int r;
1449
1450 assert(link);
1451 assert(link->manager);
1452 assert(link->manager->rtnl);
1453
6a7a4e4d 1454 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1455
1456 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1457 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1458 if (r < 0)
1459 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1460
1461 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1462 if (r < 0)
1463 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1464
8e54db83
YW		 1465 r = netlink_call_async(link->manager->rtnl, NULL, req,
1466 callback ?: link_down_handler,
302a796f 1467 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1468 if (r < 0)
1469 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1470
1471 link_ref(link);
1472
1473 return 0;
1474}
1475
89fe6535
SS		 1476static int link_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1477 int r;
1478
1479 assert(link);
1480
1481 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1482 return 1;
1483
1484 r = sd_netlink_message_get_errno(m);
1485 if (r < 0)
1486 log_link_message_warning_errno(link, m, r, "Could not set group for the interface");
1487
1488 return 1;
1489}
1490
1491static int link_set_group(Link *link) {
1492 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1493 int r;
1494
1495 assert(link);
1496 assert(link->network);
1497 assert(link->manager);
1498 assert(link->manager->rtnl);
1499
1500 if (link->network->group <= 0)
1501 return 0;
1502
1503 log_link_debug(link, "Setting group");
1504
1505 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1506 if (r < 0)
1507 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1508
1509 r = sd_netlink_message_append_u32(req, IFLA_GROUP, link->network->group);
1510 if (r < 0)
1511 return log_link_error_errno(link, r, "Could not set link group: %m");
1512
1513 r = netlink_call_async(link->manager->rtnl, NULL, req, link_group_handler,
1514 link_netlink_destroy_callback, link);
1515 if (r < 0)
1516 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1517
1518 link_ref(link);
1519
1520 return 0;
1521}
1522
0d4ad91d
AR		 1523static int link_handle_bound_to_list(Link *link) {
1524 Link *l;
0d4ad91d
AR		 1525 int r;
1526 bool required_up = false;
1527 bool link_is_up = false;
1528
1529 assert(link);
1530
1531 if (hashmap_isempty(link->bound_to_links))
1532 return 0;
1533
1534 if (link->flags & IFF_UP)
1535 link_is_up = true;
1536
90e74a66 1537 HASHMAP_FOREACH (l, link->bound_to_links)
0d4ad91d
AR		 1538 if (link_has_carrier(l)) {
1539 required_up = true;
1540 break;
1541 }
1542
1543 if (!required_up && link_is_up) {
8e54db83 1544 r = link_down(link, NULL);
0d4ad91d
AR		 1545 if (r < 0)
1546 return r;
1547 } else if (required_up && !link_is_up) {
1548 r = link_up(link);
1549 if (r < 0)
1550 return r;
1551 }
1552
1553 return 0;
1554}
1555
1556static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 1557 Link *l;
1558 int r;
1559
1560 assert(link);
1561
1562 if (hashmap_isempty(link->bound_by_links))
1563 return 0;
1564
90e74a66 1565 HASHMAP_FOREACH (l, link->bound_by_links) {
0d4ad91d
AR		 1566 r = link_handle_bound_to_list(l);
1567 if (r < 0)
1568 return r;
1569 }
1570
1571 return 0;
1572}
1573
1574static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1575 int r;
1576
1577 assert(link);
1578 assert(carrier);
1579
1580 if (link == carrier)
1581 return 0;
1582
1583 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1584 return 0;
1585
1586 r = hashmap_ensure_allocated(h, NULL);
1587 if (r < 0)
1588 return r;
1589
1590 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1591 if (r < 0)
1592 return r;
1593
1594 return 0;
1595}
1596
1597static int link_new_bound_by_list(Link *link) {
1598 Manager *m;
1599 Link *carrier;
0d4ad91d
AR		 1600 int r;
1601 bool list_updated = false;
1602
1603 assert(link);
1604 assert(link->manager);
1605
1606 m = link->manager;
1607
90e74a66 1608 HASHMAP_FOREACH(carrier, m->links) {
0d4ad91d
AR		 1609 if (!carrier->network)
1610 continue;
1611
1612 if (strv_isempty(carrier->network->bind_carrier))
1613 continue;
1614
191a3f16 1615 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 1616 r = link_put_carrier(link, carrier, &link->bound_by_links);
1617 if (r < 0)
1618 return r;
1619
1620 list_updated = true;
1621 }
1622 }
1623
1624 if (list_updated)
84de38c5 1625 link_dirty(link);
0d4ad91d 1626
90e74a66 1627 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 1628 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1629 if (r < 0)
1630 return r;
1631
84de38c5 1632 link_dirty(carrier);
0d4ad91d
AR		 1633 }
1634
1635 return 0;
1636}
1637
1638static int link_new_bound_to_list(Link *link) {
1639 Manager *m;
1640 Link *carrier;
0d4ad91d
AR		 1641 int r;
1642 bool list_updated = false;
1643
1644 assert(link);
1645 assert(link->manager);
1646
1647 if (!link->network)
1648 return 0;
1649
1650 if (strv_isempty(link->network->bind_carrier))
1651 return 0;
1652
1653 m = link->manager;
1654
90e74a66 1655 HASHMAP_FOREACH (carrier, m->links) {
191a3f16 1656 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 1657 r = link_put_carrier(link, carrier, &link->bound_to_links);
1658 if (r < 0)
1659 return r;
1660
1661 list_updated = true;
1662 }
1663 }
1664
1665 if (list_updated)
84de38c5 1666 link_dirty(link);
0d4ad91d 1667
90e74a66 1668 HASHMAP_FOREACH (carrier, link->bound_to_links) {
0d4ad91d
AR		 1669 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1670 if (r < 0)
1671 return r;
1672
84de38c5 1673 link_dirty(carrier);
0d4ad91d
AR		 1674 }
1675
1676 return 0;
1677}
1678
1679static int link_new_carrier_maps(Link *link) {
1680 int r;
1681
1682 r = link_new_bound_by_list(link);
1683 if (r < 0)
1684 return r;
1685
1686 r = link_handle_bound_by_list(link);
1687 if (r < 0)
1688 return r;
1689
1690 r = link_new_bound_to_list(link);
1691 if (r < 0)
1692 return r;
1693
1694 r = link_handle_bound_to_list(link);
1695 if (r < 0)
1696 return r;
1697
1698 return 0;
1699}
1700
1701static void link_free_bound_to_list(Link *link) {
1702 Link *bound_to;
0d4ad91d 1703
90e74a66 1704 HASHMAP_FOREACH (bound_to, link->bound_to_links) {
0d4ad91d
AR		 1705 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
1706
1707 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 1708 link_dirty(bound_to);
0d4ad91d
AR		 1709 }
1710
1711 return;
1712}
1713
1714static void link_free_bound_by_list(Link *link) {
1715 Link *bound_by;
0d4ad91d 1716
90e74a66 1717 HASHMAP_FOREACH (bound_by, link->bound_by_links) {
0d4ad91d
AR		 1718 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
1719
1720 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 1721 link_dirty(bound_by);
0d4ad91d
AR		 1722 link_handle_bound_to_list(bound_by);
1723 }
1724 }
1725
1726 return;
1727}
1728
1729static void link_free_carrier_maps(Link *link) {
1730 bool list_updated = false;
1731
1732 assert(link);
1733
1734 if (!hashmap_isempty(link->bound_to_links)) {
1735 link_free_bound_to_list(link);
1736 list_updated = true;
1737 }
1738
1739 if (!hashmap_isempty(link->bound_by_links)) {
1740 link_free_bound_by_list(link);
1741 list_updated = true;
1742 }
1743
1744 if (list_updated)
84de38c5 1745 link_dirty(link);
0d4ad91d
AR		 1746
1747 return;
1748}
1749
5f707e12
YW		 1750static int link_append_to_master(Link *link, NetDev *netdev) {
1751 Link *master;
1752 int r;
1753
1754 assert(link);
1755 assert(netdev);
1756
1757 r = link_get(link->manager, netdev->ifindex, &master);
1758 if (r < 0)
1759 return r;
1760
de7fef4b 1761 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 1762 if (r <= 0)
5f707e12
YW		 1763 return r;
1764
1765 link_ref(link);
1766 return 0;
1767}
1768
1769static void link_drop_from_master(Link *link, NetDev *netdev) {
1770 Link *master;
1771
1772 assert(link);
1773
1774 if (!link->manager || !netdev)
1775 return;
1776
1777 if (link_get(link->manager, netdev->ifindex, &master) < 0)
1778 return;
1779
1780 link_unref(set_remove(master->slaves, link));
1781}
1782
1783static void link_detach_from_manager(Link *link) {
1784 if (!link || !link->manager)
1785 return;
1786
1787 link_unref(set_remove(link->manager->links_requesting_uuid, link));
1788 link_clean(link);
1789
1790 /* The following must be called at last. */
1791 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
1792 link_unref(link);
1793}
1794
0d4ad91d
AR		 1795void link_drop(Link *link) {
1796 if (!link || link->state == LINK_STATE_LINGER)
1797 return;
1798
1799 link_set_state(link, LINK_STATE_LINGER);
1800
1801 link_free_carrier_maps(link);
1802
5f707e12
YW		 1803 if (link->network) {
1804 link_drop_from_master(link, link->network->bridge);
1805 link_drop_from_master(link, link->network->bond);
1806 }
1807
6a7a4e4d 1808 log_link_debug(link, "Link removed");
0d4ad91d 1809
db2f8a2e 1810 (void) unlink(link->state_file);
c4397d94 1811 link_detach_from_manager(link);
0d4ad91d
AR		 1812}
1813
3f265037 1814static int link_joined(Link *link) {
f882c247
TG		 1815 int r;
1816
ef1ba606 1817 assert(link);
f5be5601 1818 assert(link->network);
dd3efc09 1819
0d4ad91d
AR		 1820 if (!hashmap_isempty(link->bound_to_links)) {
1821 r = link_handle_bound_to_list(link);
1822 if (r < 0)
1823 return r;
1824 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 1825 r = link_up(link);
1826 if (r < 0) {
1827 link_enter_failed(link);
1828 return r;
1829 }
ef1ba606 1830 }
f882c247 1831
9ed794a3 1832 if (link->network->bridge) {
e1853b00 1833 r = link_set_bridge(link);
6a7a4e4d
LP		 1834 if (r < 0)
1835 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 1836
1837 r = link_append_to_master(link, link->network->bridge);
1838 if (r < 0)
1839 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 1840 }
1841
eb64b435 1842 if (link->network->bond) {
7fcee284 1843 r = link_set_bond(link);
eb64b435
SS		 1844 if (r < 0)
1845 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 1846
45e11abf 1847 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 1848 if (r < 0)
1849 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 1850 }
1851
ffff9abe
TJ		 1852 if (link->network->use_br_vlan &&
1853 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 1854 r = link_set_bridge_vlan(link);
1855 if (r < 0)
1856 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
1857 }
1858
c1835a42
RM		 1859 /* Skip setting up addresses until it gets carrier,
1860 or it would try to set addresses twice,
1861 which is bad for non-idempotent steps. */
dad2d78e 1862 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 1863 return 0;
1864
b425c3ae 1865 link_set_state(link, LINK_STATE_CONFIGURING);
682c65b0 1866 return link_set_static_configs(link);
02b59d57
TG		 1867}
1868
302a796f 1869static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 1870 int r;
1871
1746cf2a 1872 assert(link);
ef1ba606 1873 assert(link->network);
34bf3c00 1874 assert(link->enslaving > 0);
02b59d57 1875
313cefa1 1876 link->enslaving--;
52433f6b 1877
5da8149f 1878 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 1879 return 1;
1880
1c4baffc 1881 r = sd_netlink_message_get_errno(m);
856f962c 1882 if (r < 0 && r != -EEXIST) {
5ecb131d 1883 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG		 1884 link_enter_failed(link);
1885 return 1;
4ff296b0
YW		 1886 }
1887
1888 log_link_debug(link, "Joined netdev");
02b59d57 1889
34bf3c00 1890 if (link->enslaving == 0) {
4ff296b0
YW		 1891 r = link_joined(link);
1892 if (r < 0)
1893 link_enter_failed(link);
34bf3c00 1894 }
02b59d57
TG		 1895
1896 return 1;
1897}
1898
3f265037 1899static int link_enter_join_netdev(Link *link) {
6a0a2f86 1900 NetDev *netdev;
02b59d57
TG		 1901 int r;
1902
1903 assert(link);
1904 assert(link->network);
bd08ce56 1905 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 1906
289e6774 1907 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 1908
84de38c5 1909 link_dirty(link);
34bf3c00 1910 link->enslaving = 0;
02b59d57 1911
d9c67ea1 1912 if (link->network->bond) {
cbff7170
TJ		 1913 if (link->network->bond->state == NETDEV_STATE_READY &&
1914 link->network->bond->ifindex == link->master_ifindex)
1915 return link_joined(link);
1916
f2341e0a
LP		 1917 log_struct(LOG_DEBUG,
1918 LOG_LINK_INTERFACE(link),
1919 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1920 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 1921
34bf3c00
YW		 1922 link->enslaving++;
1923
f2341e0a 1924 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 1925 if (r < 0) {
f2341e0a
LP		 1926 log_struct_errno(LOG_WARNING, r,
1927 LOG_LINK_INTERFACE(link),
1928 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1929 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 1930 link_enter_failed(link);
1931 return r;
1932 }
0ad6148e
MO		 1933 }
1934
d9c67ea1 1935 if (link->network->bridge) {
f2341e0a
LP		 1936 log_struct(LOG_DEBUG,
1937 LOG_LINK_INTERFACE(link),
1938 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1939 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 1940
34bf3c00
YW		 1941 link->enslaving++;
1942
f2341e0a 1943 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 1944 if (r < 0) {
f2341e0a
LP		 1945 log_struct_errno(LOG_WARNING, r,
1946 LOG_LINK_INTERFACE(link),
1947 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1948 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 1949 link_enter_failed(link);
1950 return r;
1951 }
52433f6b
TG		 1952 }
1953
6cb955c6
AR		 1954 if (link->network->vrf) {
1955 log_struct(LOG_DEBUG,
1956 LOG_LINK_INTERFACE(link),
1957 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 1958 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
1959
34bf3c00
YW		 1960 link->enslaving++;
1961
6cb955c6
AR		 1962 r = netdev_join(link->network->vrf, link, netdev_join_handler);
1963 if (r < 0) {
1964 log_struct_errno(LOG_WARNING, r,
1965 LOG_LINK_INTERFACE(link),
1966 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 1967 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 1968 link_enter_failed(link);
1969 return r;
1970 }
6cb955c6
AR		 1971 }
1972
90e74a66 1973 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7951dea2 1974
2b6db913
YW		 1975 if (netdev->ifindex > 0)
1976 /* Assume already enslaved. */
a63e5daa 1977 continue;
a63e5daa 1978
7033af49
YW		 1979 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
1980 continue;
1981
f2341e0a
LP		 1982 log_struct(LOG_DEBUG,
1983 LOG_LINK_INTERFACE(link),
1984 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 1985 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 1986
34bf3c00
YW		 1987 link->enslaving++;
1988
f2341e0a 1989 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 1990 if (r < 0) {
f2341e0a
LP		 1991 log_struct_errno(LOG_WARNING, r,
1992 LOG_LINK_INTERFACE(link),
1993 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 1994 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 1995 link_enter_failed(link);
1996 return r;
1997 }
326cb406
SS		 1998 }
1999
34bf3c00
YW		 2000 if (link->enslaving == 0)
2001 return link_joined(link);
2002
ef1ba606
TG		 2003 return 0;
2004}
2005
769d324c 2006static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2007 int r;
2008
765afd5c 2009 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2010 return 0;
2011
765afd5c
LP		 2012 /* We propagate the forwarding flag from one interface to the
2013 * global setting one way. This means: as long as at least one
2014 * interface was configured at any time that had IP forwarding
2015 * enabled the setting will stay on for good. We do this
2016 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2017 * somewhat in sync (see below). */
15dee3f0 2018
62e021a9 2019 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2020 if (r < 0)
765afd5c 2021 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2022
769d324c
LP		 2023 return 0;
2024}
2025
2026static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2027 int r;
2028
765afd5c 2029 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2030 return 0;
2031
61233823 2032 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2033 * packet forwarding setting: either packet forwarding is on
2034 * for all, or off for all. We hence don't bother with a
2035 * per-interface setting, but simply propagate the interface
2036 * flag, if it is set, to the global flag, one-way. Note that
2037 * while IPv4 would allow a per-interface flag, we expose the
2038 * same behaviour there and also propagate the setting from
2039 * one to all, to keep things simple (see above). */
15dee3f0 2040
62e021a9 2041 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2042 if (r < 0)
765afd5c 2043 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2044
2045 return 0;
2046}
2047
49092e22 2048static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2049 IPv6PrivacyExtensions s;
49092e22
SS		 2050 int r;
2051
1f0d9695 2052 s = link_ipv6_privacy_extensions(link);
66a6bd68 2053 if (s < 0)
49092e22
SS		 2054 return 0;
2055
62e021a9 2056 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2057 if (r < 0)
49092e22
SS		 2058 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2059
2060 return 0;
2061}
2062
4f2e437a 2063static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2064 int r;
2065
2066 /* Make this a NOP if IPv6 is not available */
2067 if (!socket_ipv6_is_supported())
2068 return 0;
2069
2070 if (link->flags & IFF_LOOPBACK)
2071 return 0;
2072
d68e2e59
LP		 2073 if (!link->network)
2074 return 0;
2075
62e021a9 2076 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2077 if (r < 0)
fe307276 2078 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2079
2080 return 0;
2081}
2082
8749cbcd 2083static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2084 int r;
2085
2086 /* Make this a NOP if IPv6 is not available */
2087 if (!socket_ipv6_is_supported())
2088 return 0;
2089
2090 if (link->flags & IFF_LOOPBACK)
2091 return 0;
2092
d68e2e59
LP		 2093 if (!link->network)
2094 return 0;
2095
8749cbcd
SS		 2096 if (link->network->ipv6_dad_transmits < 0)
2097 return 0;
2098
62e021a9 2099 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2100 if (r < 0)
8749cbcd 2101 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2102
2103 return 0;
2104}
2105
b69c3180 2106static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2107 int r;
2108
2109 /* Make this a NOP if IPv6 is not available */
2110 if (!socket_ipv6_is_supported())
2111 return 0;
2112
2113 if (link->flags & IFF_LOOPBACK)
2114 return 0;
2115
d68e2e59
LP		 2116 if (!link->network)
2117 return 0;
2118
b69c3180
SS		 2119 if (link->network->ipv6_hop_limit < 0)
2120 return 0;
2121
62e021a9 2122 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2123 if (r < 0)
b69c3180 2124 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2125
2126 return 0;
2127}
2128
11102cba 2129static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2130 int r;
2131
2132 /* Make this a NOP if IPv6 is not available */
2133 if (!socket_ipv6_is_supported())
2134 return 0;
2135
2136 if (link->flags & IFF_LOOPBACK)
2137 return 0;
2138
2139 if (link->network->ipv6_mtu == 0)
2140 return 0;
2141
d236718c
DS		 2142 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
2143 * on the interface. Bump up IPv6 MTU bytes to IPV6_MTU_MIN. */
2144 if (link->network->ipv6_mtu < IPV6_MIN_MTU) {
2145 log_link_notice(link, "Bumping IPv6 MTU to "STRINGIFY(IPV6_MIN_MTU)" byte minimum required");
2146 link->network->ipv6_mtu = IPV6_MIN_MTU;
2147 }
2148
62e021a9 2149 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
d236718c
DS		 2150 if (r < 0) {
2151 if (link->mtu < link->network->ipv6_mtu)
2152 log_link_warning(link, "Cannot set IPv6 MTU %"PRIu32" higher than device MTU %"PRIu32,
2153 link->network->ipv6_mtu, link->mtu);
2154 else
2155 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2156 }
2157
2158 link->ipv6_mtu_set = true;
11102cba
SS		 2159
2160 return 0;
2161}
2162
94d76d07
YW		 2163static int link_set_ipv4_accept_local(Link *link) {
2164 int r;
2165
2166 if (link->flags & IFF_LOOPBACK)
2167 return 0;
2168
2169 if (link->network->ipv4_accept_local < 0)
2170 return 0;
2171
2172 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "accept_local", link->network->ipv4_accept_local);
2173 if (r < 0)
2174 log_link_warning_errno(link, r, "Cannot set IPv4 accept_local flag for interface: %m");
2175
2176 return 0;
2177}
2178
0917a271
DS		 2179static int link_enumerate_ipv6_tentative_addresses(Link *link) {
2180 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
2181 sd_netlink_message *addr;
2182 int r;
2183
2184 assert(link);
2185 assert(link->manager);
2186 assert(link->manager->rtnl);
2187
2188 r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_GETADDR, 0, AF_INET6);
2189 if (r < 0)
2190 return r;
2191
2192 r = sd_netlink_call(link->manager->rtnl, req, 0, &reply);
2193 if (r < 0)
2194 return r;
2195
2196 for (addr = reply; addr; addr = sd_netlink_message_next(addr)) {
2197 unsigned char flags;
2198 int ifindex;
2199
2200 r = sd_rtnl_message_addr_get_ifindex(addr, &ifindex);
2201 if (r < 0) {
2202 log_link_warning_errno(link, r, "rtnl: invalid ifindex, ignoring: %m");
2203 continue;
2204 } else if (link->ifindex != ifindex)
2205 continue;
2206
2207 r = sd_rtnl_message_addr_get_flags(addr, &flags);
2208 if (r < 0) {
2209 log_link_warning_errno(link, r, "rtnl: received address message with invalid flags, ignoring: %m");
2210 continue;
2211 } else if (!(flags & IFA_F_TENTATIVE))
2212 continue;
2213
2214 log_link_debug(link, "Found tentative ipv6 link-local address");
2215 (void) manager_rtnl_process_address(link->manager->rtnl, addr, link->manager);
2216 }
2217
2218 return 0;
2219}
2220
5e5b137a 2221static int link_drop_foreign_config(Link *link) {
5e5b137a
TG		 2222 int r;
2223
0917a271
DS		 2224 /* The kernel doesn't notify us about tentative addresses;
2225 * so if ipv6ll is disabled, we need to enumerate them now so we can drop them below */
2226 if (!link_ipv6ll_enabled(link)) {
2227 r = link_enumerate_ipv6_tentative_addresses(link);
2228 if (r < 0)
2229 return r;
2230 }
2231
f8f2f880
YW		 2232 r = link_drop_foreign_addresses(link);
2233 if (r < 0)
2234 return r;
5e5b137a 2235
59048336
YW		 2236 r = link_drop_foreign_neighbors(link);
2237 if (r < 0)
2238 return r;
d1bdafd2 2239
779804dd 2240 return link_drop_foreign_routes(link);
5e5b137a
TG		 2241}
2242
3104883d 2243static int link_drop_config(Link *link) {
3104883d
SS		 2244 int r;
2245
d7fbb9f5
YW		 2246 r = link_drop_addresses(link);
2247 if (r < 0)
2248 return r;
3104883d 2249
59048336
YW		 2250 r = link_drop_neighbors(link);
2251 if (r < 0)
2252 return r;
d1bdafd2 2253
62f0ea5f
YW		 2254 r = link_drop_routes(link);
2255 if (r < 0)
2256 return r;
3104883d 2257
c69305ff
LP		 2258 ndisc_flush(link);
2259
3104883d
SS		 2260 return 0;
2261}
2262
34658df2
YW		 2263static int link_configure_traffic_control(Link *link) {
2264 TrafficControl *tc;
02b59d57
TG		 2265 int r;
2266
34658df2
YW		 2267 link->tc_configured = false;
2268 link->tc_messages = 0;
4ecdcb07 2269
90e74a66 2270 ORDERED_HASHMAP_FOREACH(tc, link->network->tc_by_section) {
34658df2 2271 r = traffic_control_configure(link, tc);
4ecdcb07
YW		 2272 if (r < 0)
2273 return r;
2274 }
2275
34658df2
YW		 2276 if (link->tc_messages == 0)
2277 link->tc_configured = true;
4ecdcb07 2278 else
34658df2 2279 log_link_debug(link, "Configuring traffic control");
4ecdcb07
YW		 2280
2281 return 0;
2282}
2283
518cd6b5
SS		 2284static int link_configure_sr_iov(Link *link) {
2285 SRIOV *sr_iov;
518cd6b5
SS		 2286 int r;
2287
2288 link->sr_iov_configured = false;
2289 link->sr_iov_messages = 0;
2290
90e74a66 2291 ORDERED_HASHMAP_FOREACH(sr_iov, link->network->sr_iov_by_section) {
518cd6b5
SS		 2292 r = sr_iov_configure(link, sr_iov);
2293 if (r < 0)
2294 return r;
2295 }
2296
2297 if (link->sr_iov_messages == 0)
2298 link->sr_iov_configured = true;
2299 else
2300 log_link_debug(link, "Configuring SR-IOV");
2301
2302 return 0;
2303}
2304
4ecdcb07
YW		 2305static int link_configure(Link *link) {
2306 int r;
2307
ef1ba606 2308 assert(link);
b22d8a00 2309 assert(link->network);
bd08ce56 2310 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2311
34658df2 2312 r = link_configure_traffic_control(link);
4ecdcb07
YW		 2313 if (r < 0)
2314 return r;
2315
518cd6b5
SS		 2316 r = link_configure_sr_iov(link);
2317 if (r < 0)
2318 return r;
2319
500b96eb 2320 if (link->iftype == ARPHRD_CAN)
93ea7750 2321 return link_configure_can(link);
92c918b0 2322
482efedc
SS		 2323 /* If IPv6 configured that is static IPv6 address and IPv6LL autoconfiguration is enabled
2324 * for this interface, then enable IPv6 */
57ad7607 2325 (void) link_update_ipv6_sysctl(link);
482efedc 2326
23d8b221
SS		 2327 r = link_set_proxy_arp(link);
2328 if (r < 0)
2329 return r;
2330
c16b5821 2331 r = link_set_ipv6_proxy_ndp_addresses(link);
a0e5c15d
FK		 2332 if (r < 0)
2333 return r;
2334
769d324c
LP		 2335 r = link_set_ipv4_forward(link);
2336 if (r < 0)
2337 return r;
2338
2339 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2340 if (r < 0)
2341 return r;
2342
49092e22
SS		 2343 r = link_set_ipv6_privacy_extensions(link);
2344 if (r < 0)
2345 return r;
2346
4f2e437a
SS		 2347 r = link_set_ipv6_accept_ra(link);
2348 if (r < 0)
2349 return r;
2350
8749cbcd
SS		 2351 r = link_set_ipv6_dad_transmits(link);
2352 if (r < 0)
2353 return r;
b69c3180
SS		 2354
2355 r = link_set_ipv6_hop_limit(link);
2356 if (r < 0)
2357 return r;
8749cbcd 2358
94d76d07
YW		 2359 r = link_set_ipv4_accept_local(link);
2360 if (r < 0)
2361 return r;
2362
99d2baa2
SS		 2363 r = link_set_flags(link);
2364 if (r < 0)
2365 return r;
2366
89fe6535
SS		 2367 r = link_set_group(link);
2368 if (r < 0)
2369 return r;
2370
910feb78 2371 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
b22d8a00 2372 r = ipv4ll_configure(link);
eb34d4af
TG		 2373 if (r < 0)
2374 return r;
2375 }
2376
78c958f8 2377 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2378 r = dhcp4_set_promote_secondaries(link);
2379 if (r < 0)
2380 return r;
2381
3c9b8860 2382 r = dhcp4_configure(link);
eb34d4af
TG		 2383 if (r < 0)
2384 return r;
eb34d4af
TG		 2385 }
2386
62379e88
TG		 2387 if (link_dhcp6_enabled(link) ||
2388 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2389 r = dhcp6_configure(link);
2390 if (r < 0)
2391 return r;
2392 }
2393
2394 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2395 r = ndisc_configure(link);
4138fb2c
PF		 2396 if (r < 0)
2397 return r;
2398 }
2399
086b8853
YW		 2400 r = radv_configure(link);
2401 if (r < 0)
2402 return r;
7465dd22 2403
8e1ad1ea 2404 if (link_lldp_rx_enabled(link)) {
7f853950 2405 r = link_lldp_rx_configure(link);
273eec24
LP		 2406 if (r < 0)
2407 return r;
ce43e484
SS		 2408 }
2409
f6fcc1c2 2410 r = link_configure_mtu(link);
40288ece
YW		 2411 if (r < 0)
2412 return r;
44b598a1 2413
9f6e82e6
YW		 2414 r = link_configure_addrgen_mode(link);
2415 if (r < 0)
2416 return r;
0e2fdb83 2417
051e77ca
SS		 2418 r = link_configure_ipv4_dad(link);
2419 if (r < 0)
2420 return r;
2421
3a390124
DS		 2422 return link_configure_continue(link);
2423}
2424
2425/* The configuration continues in this separate function, instead of
2426 * including this in the above link_configure() function, for two
2427 * reasons:
2428 * 1) some devices reset the link when the mtu is set, which caused
2429 * an infinite loop here in networkd; see:
2430 * https://github.com/systemd/systemd/issues/6593
2431 * https://github.com/systemd/systemd/issues/9831
2432 * 2) if ipv6ll is disabled, then bringing the interface up must be
2433 * delayed until after we get confirmation from the kernel that
2434 * the addr_gen_mode parameter has been set (via netlink), see:
2435 * https://github.com/systemd/systemd/issues/13882
2436 */
2437static int link_configure_continue(Link *link) {
55dc8c4a
YW		 2438 int r;
2439
2440 assert(link);
2441 assert(link->network);
bd08ce56 2442 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a 2443
9524014e 2444 if (link->setting_mtu || link->setting_genmode)
55dc8c4a
YW		 2445 return 0;
2446
4c649652
DS		 2447 /* Drop foreign config, but ignore loopback or critical devices.
2448 * We do not want to remove loopback address or addresses used for root NFS. */
2449 if (!(link->flags & IFF_LOOPBACK) &&
2450 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
2451 r = link_drop_foreign_config(link);
2452 if (r < 0)
2453 return r;
2454 }
2455
d236718c
DS		 2456 /* The kernel resets ipv6 mtu after changing device mtu;
2457 * we must set this here, after we've set device mtu */
2458 r = link_set_ipv6_mtu(link);
2459 if (r < 0)
2460 return r;
2461
dad2d78e 2462 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2463 r = link_acquire_conf(link);
2464 if (r < 0)
2465 return r;
cc544d5f 2466 }
1e9be60b 2467
3f265037 2468 return link_enter_join_netdev(link);
505f8da7
TG		 2469}
2470
27dfc982
YW		 2471static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2472 assert(duid);
2473
2474 if (duid->raw_data_len > 0)
2475 return 0;
2476
2477 if (duid->type != DUID_TYPE_UUID)
2478 return -EINVAL;
2479
2480 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2481 duid->raw_data_len = sizeof(sd_id128_t);
2482
2483 return 1;
2484}
2485
2486int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2487 Manager *manager = userdata;
2488 const sd_bus_error *e;
2489 const void *a;
2490 size_t sz;
2491 DUID *duid;
2492 Link *link;
2493 int r;
2494
2495 assert(m);
2496 assert(manager);
2497
2498 e = sd_bus_message_get_error(m);
2499 if (e) {
2500 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 2501 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 2502 e->message);
2503 goto configure;
2504 }
2505
2506 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2507 if (r < 0)
2508 goto configure;
2509
2510 if (sz != sizeof(sd_id128_t)) {
ab4dd984 2511 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 2512 goto configure;
2513 }
2514
2515 memcpy(&manager->product_uuid, a, sz);
2516 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2517 (void) duid_set_uuid(duid, manager->product_uuid);
2518
2519 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2520
2521configure:
2522 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3dc2e7af
YW		 2523 link_unref(link);
2524
27dfc982
YW		 2525 r = link_configure(link);
2526 if (r < 0)
4ff296b0 2527 link_enter_failed(link);
27dfc982
YW		 2528 }
2529
2530 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
2531
2532 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2533 * even if the method fails. */
2534 manager->has_product_uuid = true;
2535
2536 return 1;
2537}
2538
2539static bool link_requires_uuid(Link *link) {
2540 const DUID *duid;
2541
2542 assert(link);
2543 assert(link->manager);
2544 assert(link->network);
2545
2546 duid = link_get_duid(link);
2547 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
2548 return false;
2549
2550 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
2551 return true;
2552
2553 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
2554 return true;
2555
2556 return false;
2557}
2558
2559static int link_configure_duid(Link *link) {
2560 Manager *m;
2561 DUID *duid;
2562 int r;
2563
2564 assert(link);
2565 assert(link->manager);
2566 assert(link->network);
2567
2568 m = link->manager;
2569 duid = link_get_duid(link);
2570
2571 if (!link_requires_uuid(link))
2572 return 1;
2573
2574 if (m->has_product_uuid) {
2575 (void) duid_set_uuid(duid, m->product_uuid);
2576 return 1;
2577 }
2578
2579 if (!m->links_requesting_uuid) {
2580 r = manager_request_product_uuid(m, link);
2581 if (r < 0) {
2582 if (r == -ENOMEM)
2583 return r;
2584
ab4dd984
ZJS		 2585 log_link_warning_errno(link, r,
2586 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 2587 return 1;
2588 }
2589 } else {
2590 r = set_put(m->links_requesting_uuid, link);
2591 if (r < 0)
2592 return log_oom();
39dbd0c7
ZJS		 2593 if (r > 0)
2594 link_ref(link);
27dfc982
YW		 2595
2596 r = set_put(m->duids_requesting_uuid, duid);
2597 if (r < 0)
2598 return log_oom();
2599 }
2600
2601 return 0;
2602}
2603
572b21d9 2604static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
ad932b15
YW		 2605 Network *network;
2606 int r;
2607
572b21d9
YW		 2608 if (m) {
2609 _cleanup_strv_free_ char **s = NULL;
2610
2611 r = sd_netlink_message_get_errno(m);
2612 if (r < 0)
2613 return r;
2614
2615 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2616 if (r < 0 && r != -ENODATA)
2617 return r;
2618
2619 strv_free_and_replace(link->alternative_names, s);
2620 }
2621
c643bda5
YW		 2622 r = network_get(link->manager, link->iftype, link->sd_device,
2623 link->ifname, link->alternative_names, link->driver,
2624 &link->mac, &link->permanent_mac,
2625 link->wlan_iftype, link->ssid, &link->bssid, &network);
ad932b15
YW		 2626 if (r == -ENOENT) {
2627 link_enter_unmanaged(link);
2628 return 0;
2629 } else if (r == 0 && network->unmanaged) {
2630 link_enter_unmanaged(link);
2631 return 0;
2632 } else if (r < 0)
2633 return r;
2634
99b8517c 2635 if (link->network == network && !force)
ad932b15
YW		 2636 return 0;
2637
2638 log_link_info(link, "Re-configuring with %s", network->filename);
2639
2640 /* Dropping old .network file */
2641 r = link_stop_clients(link, false);
572b21d9 2642 if (r < 0)
ad932b15 2643 return r;
ad932b15 2644
5ae0fb7f 2645 if (link->dhcp_server)
ad932b15
YW		 2646 (void) sd_dhcp_server_stop(link->dhcp_server);
2647
2648 r = link_drop_config(link);
2649 if (r < 0)
2650 return r;
2651
2c7b826d 2652 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
ad932b15
YW		 2653 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
2654 r = link_drop_foreign_config(link);
2655 if (r < 0)
2656 return r;
2657 }
2658
2659 link_free_carrier_maps(link);
2660 link_free_engines(link);
2661 link->network = network_unref(link->network);
2662
2663 /* Then, apply new .network file */
2664 r = network_apply(network, link);
2665 if (r < 0)
2666 return r;
2667
2668 r = link_new_carrier_maps(link);
2669 if (r < 0)
2670 return r;
2671
2672 link_set_state(link, LINK_STATE_INITIALIZED);
8ae7b8a1 2673 link_dirty(link);
ad932b15
YW		 2674
2675 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2676 * link_configure() is called later asynchronously. */
2677 r = link_configure_duid(link);
2678 if (r <= 0)
2679 return r;
2680
2681 r = link_configure(link);
2682 if (r < 0)
2683 return r;
2684
2685 return 0;
2686}
2687
572b21d9
YW		 2688static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2689 int r;
2690
2691 r = link_reconfigure_internal(link, m, false);
2692 if (r < 0)
2693 link_enter_failed(link);
2694
2695 return 1;
2696}
2697
2698static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2699 int r;
2700
2701 r = link_reconfigure_internal(link, m, true);
2702 if (r < 0)
2703 link_enter_failed(link);
2704
2705 return 1;
2706}
2707
2708int link_reconfigure(Link *link, bool force) {
2709 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2710 int r;
2711
2c0d7ed3
YW		 2712 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
2713 return 0;
2714
572b21d9
YW		 2715 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2716 link->ifindex);
2717 if (r < 0)
2718 return r;
2719
2720 r = netlink_call_async(link->manager->rtnl, NULL, req,
2721 force ? link_force_reconfigure_handler : link_reconfigure_handler,
2722 link_netlink_destroy_callback, link);
2723 if (r < 0)
2724 return r;
2725
2726 link_ref(link);
2727
2728 return 0;
2729}
2730
e6bf7774 2731static int link_initialized_and_synced(Link *link) {
505f8da7 2732 Network *network;
505f8da7
TG		 2733 int r;
2734
2735 assert(link);
2736 assert(link->ifname);
2737 assert(link->manager);
2738
bd08ce56
YW		 2739 /* We may get called either from the asynchronous netlink callback,
2740 * or directly for link_add() if running in a container. See link_add(). */
2741 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2742 return 0;
505f8da7 2743
6a7a4e4d 2744 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2745 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2746
0d4ad91d
AR		 2747 r = link_new_bound_by_list(link);
2748 if (r < 0)
2749 return r;
2750
2751 r = link_handle_bound_by_list(link);
2752 if (r < 0)
2753 return r;
2754
c4a03a56 2755 if (!link->network) {
0894cfe4 2756 r = wifi_get_info(link);
8d968fdd
YW		 2757 if (r < 0)
2758 return r;
2759
c643bda5
YW		 2760 r = network_get(link->manager, link->iftype, link->sd_device,
2761 link->ifname, link->alternative_names, link->driver,
2762 &link->mac, &link->permanent_mac,
2763 link->wlan_iftype, link->ssid, &link->bssid, &network);
c4a03a56
TG		 2764 if (r == -ENOENT) {
2765 link_enter_unmanaged(link);
4232cf04 2766 return 0;
a09dc546
DM		 2767 } else if (r == 0 && network->unmanaged) {
2768 link_enter_unmanaged(link);
2769 return 0;
c4a03a56
TG		 2770 } else if (r < 0)
2771 return r;
505f8da7 2772
c4a03a56
TG		 2773 if (link->flags & IFF_LOOPBACK) {
2774 if (network->link_local != ADDRESS_FAMILY_NO)
2775 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2776
c4a03a56
TG		 2777 if (network->dhcp != ADDRESS_FAMILY_NO)
2778 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2779
c4a03a56
TG		 2780 if (network->dhcp_server)
2781 log_link_debug(link, "Ignoring DHCP server for loopback link");
2782 }
bd2efe92 2783
7d342c03 2784 r = network_apply(network, link);
c4a03a56
TG		 2785 if (r < 0)
2786 return r;
2787 }
505f8da7 2788
0d4ad91d
AR		 2789 r = link_new_bound_to_list(link);
2790 if (r < 0)
2791 return r;
2792
27dfc982
YW		 2793 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2794 * link_configure() is called later asynchronously. */
2795 r = link_configure_duid(link);
2796 if (r <= 0)
2797 return r;
2798
a748b692
TG		 2799 r = link_configure(link);
2800 if (r < 0)
2801 return r;
2802
4232cf04 2803 return 0;
505f8da7
TG		 2804}
2805
302a796f 2806static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
572b21d9 2807 _cleanup_strv_free_ char **s = NULL;
4ff296b0
YW		 2808 int r;
2809
572b21d9
YW		 2810 r = sd_netlink_message_get_errno(m);
2811 if (r < 0) {
40681e5c 2812 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 2813 link_enter_failed(link);
2814 return 0;
2815 }
2816
2817 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2818 if (r < 0 && r != -ENODATA) {
2819 link_enter_failed(link);
2820 return 0;
2821 }
2822
2823 strv_free_and_replace(link->alternative_names, s);
2824
4ff296b0
YW		 2825 r = link_initialized_and_synced(link);
2826 if (r < 0)
2827 link_enter_failed(link);
e6bf7774
YW		 2828 return 1;
2829}
2830
51517f9e 2831int link_initialized(Link *link, sd_device *device) {
4afd3348 2832 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2833 int r;
2834
2835 assert(link);
2836 assert(link->manager);
2837 assert(link->manager->rtnl);
2838 assert(device);
2839
8434fd5c 2840 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2841 return 0;
2842
51517f9e 2843 if (link->sd_device)
679b3605
TG		 2844 return 0;
2845
79008bdd 2846 log_link_debug(link, "udev initialized link");
bd08ce56 2847 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 2848
51517f9e 2849 link->sd_device = sd_device_ref(device);
4f561e8e 2850
3c9b8860
TG		 2851 /* udev has initialized the link, but we don't know if we have yet
2852 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2853 * when it returns we know that the pending NEWLINKs have already been
2854 * processed and that we are up-to-date */
4f561e8e 2855
3c9b8860
TG		 2856 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2857 link->ifindex);
4f561e8e
TG		 2858 if (r < 0)
2859 return r;
2860
302a796f
YW		 2861 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
2862 link_netlink_destroy_callback, link);
4f561e8e
TG		 2863 if (r < 0)
2864 return r;
2865
5da8149f
TG		 2866 link_ref(link);
2867
4f561e8e
TG		 2868 return 0;
2869}
2870
c4a03a56 2871static int link_load(Link *link) {
0bc70f1d
TG		 2872 _cleanup_free_ char *network_file = NULL,
2873 *addresses = NULL,
f703cc2c 2874 *routes = NULL,
0bc70f1d
TG		 2875 *dhcp4_address = NULL,
2876 *ipv4ll_address = NULL;
2877 union in_addr_union address;
c4a03a56
TG		 2878 int r;
2879
2880 assert(link);
2881
aa8fbc74 2882 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 2883 "NETWORK_FILE", &network_file,
2884 "ADDRESSES", &addresses,
f703cc2c 2885 "ROUTES", &routes,
0bc70f1d 2886 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 2887 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 2888 if (r < 0 && r != -ENOENT)
2889 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
2890
2891 if (network_file) {
2892 Network *network;
2893 char *suffix;
2894
2895 /* drop suffix */
2896 suffix = strrchr(network_file, '.');
2897 if (!suffix) {
2898 log_link_debug(link, "Failed to get network name from %s", network_file);
2899 goto network_file_fail;
2900 }
2901 *suffix = '\0';
2902
2903 r = network_get_by_name(link->manager, basename(network_file), &network);
2904 if (r < 0) {
2905 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
2906 goto network_file_fail;
2907 }
2908
7d342c03 2909 r = network_apply(network, link);
c4a03a56
TG		 2910 if (r < 0)
2911 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
2912 }
2913
2914network_file_fail:
2915
da4d3a61
YW		 2916 r = link_deserialize_addresses(link, addresses);
2917 if (r < 0)
2918 log_link_warning_errno(link, r, "Failed to load addresses from %s, ignoring: %m", link->state_file);
74544b4e 2919
731ff05b
YW		 2920 r = link_deserialize_routes(link, routes);
2921 if (r < 0)
2922 log_link_warning_errno(link, r, "Failed to load routes from %s, ignoring: %m", link->state_file);
f703cc2c 2923
0bc70f1d
TG		 2924 if (dhcp4_address) {
2925 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
2926 if (r < 0) {
b68d26b8 2927 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 2928 goto dhcp4_address_fail;
2929 }
2930
b1c626f6 2931 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 2932 if (r < 0)
b68d26b8 2933 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d 2934
1b43e246
DS		 2935 r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0);
2936 if (r < 0)
2937 return log_link_error_errno(link, r, "Failed to attach DHCPv4 event: %m");
2938
0bc70f1d
TG		 2939 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
2940 if (r < 0)
b68d26b8 2941 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 2942 }
2943
2944dhcp4_address_fail:
2945
2946 if (ipv4ll_address) {
2947 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
2948 if (r < 0) {
b68d26b8 2949 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 2950 goto ipv4ll_address_fail;
2951 }
2952
2953 r = sd_ipv4ll_new(&link->ipv4ll);
2954 if (r < 0)
b68d26b8 2955 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d 2956
1b43e246
DS		 2957 r = sd_ipv4ll_attach_event(link->ipv4ll, NULL, 0);
2958 if (r < 0)
2959 return log_link_error_errno(link, r, "Failed to attach IPv4LL event: %m");
2960
0bc70f1d
TG		 2961 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
2962 if (r < 0)
b68d26b8 2963 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 2964 }
2965
2966ipv4ll_address_fail:
2967
c4a03a56
TG		 2968 return 0;
2969}
2970
1c4baffc 2971int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 2972 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 2973 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 2974 Link *link;
5a937ea2 2975 int r;
505f8da7
TG		 2976
2977 assert(m);
fbbeb65a 2978 assert(m->rtnl);
505f8da7
TG		 2979 assert(message);
2980 assert(ret);
2981
2982 r = link_new(m, message, ret);
2983 if (r < 0)
2984 return r;
2985
2986 link = *ret;
2987
6a7a4e4d 2988 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 2989
c4a03a56
TG		 2990 r = link_load(link);
2991 if (r < 0)
2992 return r;
2993
bf331d87
YW		 2994 if (path_is_read_only_fs("/sys") <= 0) {
2995 /* udev should be around */
ae06ab10 2996 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 2997 r = sd_device_new_from_device_id(&device, ifindex_str);
2998 if (r < 0) {
4d59e14f
YW		 2999 log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m");
3000 return 0;
5c416fc4 3001 }
505f8da7 3002
5a937ea2 3003 r = sd_device_get_is_initialized(device);
51517f9e 3004 if (r < 0) {
bf331d87 3005 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 3006 goto failed;
3007 }
5a937ea2 3008 if (r == 0) {
505f8da7 3009 /* not yet ready */
79008bdd 3010 log_link_debug(link, "link pending udev initialization...");
505f8da7 3011 return 0;
3c4cb064 3012 }
505f8da7 3013
299ad32d
YW		 3014 r = device_is_renaming(device);
3015 if (r < 0) {
bf331d87 3016 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 3017 goto failed;
3018 }
3019 if (r > 0) {
bf331d87 3020 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 3021 return 0;
3022 }
3023
4f561e8e
TG		 3024 r = link_initialized(link, device);
3025 if (r < 0)
5c416fc4 3026 goto failed;
4f561e8e 3027 } else {
e6bf7774 3028 r = link_initialized_and_synced(link);
4f561e8e 3029 if (r < 0)
5c416fc4 3030 goto failed;
4f561e8e 3031 }
505f8da7 3032
a748b692 3033 return 0;
5c416fc4
TG		 3034failed:
3035 link_enter_failed(link);
3036 return r;
a748b692
TG		 3037}
3038
c601ebf7 3039int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3040 int r;
3041
3042 assert(link);
3043
3044 log_link_info(link, "Gained IPv6LL");
3045
c601ebf7 3046 link->ipv6ll_address = *address;
e7ab854c
TG		 3047 link_check_ready(link);
3048
b9ea3d2e 3049 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3050 r = link_acquire_ipv6_conf(link);
3051 if (r < 0) {
3052 link_enter_failed(link);
3053 return r;
3054 }
3055 }
3056
3057 return 0;
3058}
3059
9c0a72f9
TG		 3060static int link_carrier_gained(Link *link) {
3061 int r;
3062
3063 assert(link);
3064
0894cfe4 3065 r = wifi_get_info(link);
8d968fdd
YW		 3066 if (r < 0)
3067 return r;
3068 if (r > 0) {
572b21d9
YW		 3069 r = link_reconfigure_internal(link, NULL, false);
3070 if (r < 0) {
3071 link_enter_failed(link);
8d968fdd 3072 return r;
572b21d9 3073 }
8d968fdd
YW		 3074 }
3075
b9ea3d2e 3076 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3077 r = link_acquire_conf(link);
3078 if (r < 0) {
3079 link_enter_failed(link);
3080 return r;
3081 }
6fc25497 3082
b425c3ae 3083 link_set_state(link, LINK_STATE_CONFIGURING);
682c65b0 3084 r = link_set_static_configs(link);
6fc25497
SS		 3085 if (r < 0)
3086 return r;
9c0a72f9
TG		 3087 }
3088
0d4ad91d
AR		 3089 r = link_handle_bound_by_list(link);
3090 if (r < 0)
3091 return r;
3092
1f241589
YW		 3093 if (!link->bridge_mdb_configured) {
3094 r = link_set_bridge_mdb(link);
3095 if (r < 0)
3096 return r;
3097 }
3098
3099 if (streq_ptr(link->kind, "bridge")) {
3100 Link *slave;
3101
3102 SET_FOREACH(slave, link->slaves) {
3103 if (slave->bridge_mdb_configured)
3104 continue;
3105
3106 r = link_set_bridge_mdb(slave);
3107 if (r < 0)
3108 link_enter_failed(slave);
3109 }
3110 }
3db468ea 3111
9c0a72f9
TG		 3112 return 0;
3113}
3114
3115static int link_carrier_lost(Link *link) {
3116 int r;
3117
3118 assert(link);
3119
25e992ba 3120 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3121 return 0;
3122
fbdb6605 3123 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3124 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3125 * configuration and stop the clients as well. */
97e7fb39
SS		 3126 if (link->setting_mtu)
3127 return 0;
3128
95355a28 3129 r = link_stop_clients(link, false);
9c0a72f9
TG		 3130 if (r < 0) {
3131 link_enter_failed(link);
3132 return r;
3133 }
3134
5ae0fb7f 3135 if (link->dhcp_server)
28464ae0 3136 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3137
3104883d
SS		 3138 r = link_drop_config(link);
3139 if (r < 0)
3140 return r;
3141
2c7b826d 3142 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
f258e948 3143 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3144 r = link_drop_foreign_config(link);
3145 if (r < 0)
3146 return r;
3147 }
3104883d 3148
0d4ad91d
AR		 3149 r = link_handle_bound_by_list(link);
3150 if (r < 0)
3151 return r;
3152
9c0a72f9
TG		 3153 return 0;
3154}
3155
3156int link_carrier_reset(Link *link) {
3157 int r;
3158
3159 assert(link);
3160
3161 if (link_has_carrier(link)) {
3162 r = link_carrier_lost(link);
3163 if (r < 0)
3164 return r;
3165
3166 r = link_carrier_gained(link);
3167 if (r < 0)
3168 return r;
3169
6a7a4e4d 3170 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3171 }
3172
3173 return 0;
3174}
3175
d236718c
DS		 3176/* This is called every time an interface admin state changes to up;
3177 * specifically, when IFF_UP flag changes from unset to set */
3178static int link_admin_state_up(Link *link) {
3179 int r;
3180
3181 /* We set the ipv6 mtu after the device mtu, but the kernel resets
3182 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
3183 * ipv6_mtu_set prevents this from trying to set it too early before
3184 * the link->network has been setup; we only need to reset it
3185 * here if we've already set it during normal initialization. */
3186 if (link->ipv6_mtu_set) {
3187 r = link_set_ipv6_mtu(link);
3188 if (r < 0)
3189 return r;
3190 }
3191
3192 return 0;
3193}
3194
1c4baffc 3195int link_update(Link *link, sd_netlink_message *m) {
572b21d9 3196 _cleanup_strv_free_ char **s = NULL;
c49b33ac 3197 struct ether_addr mac;
ca4e095a 3198 const char *ifname;
afe7fd56 3199 uint32_t mtu;
d236718c 3200 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 3201 int old_master, r;
22936833 3202
dd3efc09 3203 assert(link);
b8941f74 3204 assert(link->ifname);
22936833
TG		 3205 assert(m);
3206
7619683b 3207 if (link->state == LINK_STATE_LINGER) {
5238e957 3208 log_link_info(link, "Link re-added");
289e6774 3209 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3210
3211 r = link_new_carrier_maps(link);
3212 if (r < 0)
3213 return r;
7619683b
TG		 3214 }
3215
1c4baffc 3216 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3217 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3218 Manager *manager = link->manager;
b8941f74 3219
30de2b89 3220 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3221
30de2b89
YW		 3222 link_drop(link);
3223 r = link_add(manager, m, &link);
3224 if (r < 0)
3225 return r;
b8941f74
TG		 3226 }
3227
572b21d9
YW		 3228 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3229 if (r >= 0)
3230 strv_free_and_replace(link->alternative_names, s);
3231
1c4baffc 3232 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3233 if (r >= 0 && mtu > 0) {
3234 link->mtu = mtu;
4e964aa0 3235 if (link->original_mtu == 0) {
afe7fd56 3236 link->original_mtu = mtu;
6a7a4e4d 3237 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3238 }
3239
3240 if (link->dhcp_client) {
3c9b8860
TG		 3241 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3242 link->mtu);
fc95c359
YW		 3243 if (r < 0)
3244 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3245 }
7465dd22
PF		 3246
3247 if (link->radv) {
3248 r = sd_radv_set_mtu(link->radv, link->mtu);
3249 if (r < 0)
3250 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3251 }
9842de0d 3252 }
69629de9 3253
e9189a1f
TG		 3254 /* The kernel may broadcast NEWLINK messages without the MAC address
3255 set, simply ignore them. */
1c4baffc 3256 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
807667f7
YW		 3257 if (r >= 0 && memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN) != 0) {
3258
3259 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN);
3260
3261 log_link_debug(link, "Gained new MAC address: "
3262 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3263 mac.ether_addr_octet[0],
3264 mac.ether_addr_octet[1],
3265 mac.ether_addr_octet[2],
3266 mac.ether_addr_octet[3],
3267 mac.ether_addr_octet[4],
3268 mac.ether_addr_octet[5]);
3269
3270 if (link->ipv4ll) {
3271 bool restart = sd_ipv4ll_is_running(link->ipv4ll) > 0;
3272
3273 if (restart) {
3274 r = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 3275 if (r < 0)
807667f7 3276 return log_link_warning_errno(link, r, "Could not stop IPv4LL client: %m");
c49b33ac 3277 }
c49b33ac 3278
807667f7
YW		 3279 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
3280 if (r < 0)
3281 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
3282
3283 if (restart) {
3284 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d 3285 if (r < 0)
807667f7
YW		 3286 return log_link_warning_errno(link, r, "Could not restart IPv4LL client: %m");
3287 }
3288 }
3289
3290 if (link->dhcp_client) {
3291 r = sd_dhcp_client_set_mac(link->dhcp_client,
3292 (const uint8_t *) &link->mac,
3293 sizeof (link->mac),
3294 ARPHRD_ETHER);
3295 if (r < 0)
3296 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
3297
3298 r = dhcp4_set_client_identifier(link);
3299 if (r < 0)
3300 return log_link_warning_errno(link, r, "Could not set DHCP client identifier: %m");
3301 }
413708d1 3302
807667f7
YW		 3303 if (link->dhcp6_client) {
3304 const DUID* duid = link_get_duid(link);
3305 bool restart = sd_dhcp6_client_is_running(link->dhcp6_client) > 0;
3306
3307 if (restart) {
3308 r = sd_dhcp6_client_stop(link->dhcp6_client);
fff1f40c 3309 if (r < 0)
807667f7 3310 return log_link_warning_errno(link, r, "Could not stop DHCPv6 client: %m");
c49b33ac 3311 }
4138fb2c 3312
807667f7
YW		 3313 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
3314 (const uint8_t *) &link->mac,
3315 sizeof (link->mac),
3316 ARPHRD_ETHER);
3317 if (r < 0)
3318 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
8341a5c3 3319
807667f7
YW		 3320 if (link->network->iaid_set) {
3321 r = sd_dhcp6_client_set_iaid(link->dhcp6_client, link->network->iaid);
6a7a4e4d 3322 if (r < 0)
807667f7
YW		 3323 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3324 }
3325
3326 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3327 duid->type,
3328 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3329 duid->raw_data_len);
3330 if (r < 0)
3331 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
3332
3333 if (restart) {
3334 r = sd_dhcp6_client_start(link->dhcp6_client);
413708d1 3335 if (r < 0)
807667f7 3336 return log_link_warning_errno(link, r, "Could not restart DHCPv6 client: %m");
4138fb2c 3337 }
807667f7 3338 }
7465dd22 3339
807667f7
YW		 3340 if (link->radv) {
3341 bool restart = sd_radv_is_running(link->radv);
3342
3343 if (restart) {
3344 r = sd_radv_stop(link->radv);
7465dd22 3345 if (r < 0)
807667f7 3346 return log_link_warning_errno(link, r, "Could not stop Router Advertisement: %m");
7465dd22 3347 }
420d2058 3348
807667f7
YW		 3349 r = sd_radv_set_mac(link->radv, &link->mac);
3350 if (r < 0)
3351 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3352
3353 if (restart) {
3354 r = sd_radv_start(link->radv);
420d2058 3355 if (r < 0)
807667f7 3356 return log_link_warning_errno(link, r, "Could not restart Router Advertisement: %m");
420d2058 3357 }
c49b33ac 3358 }
807667f7
YW		 3359
3360 if (link->ndisc) {
3361 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3362 if (r < 0)
3363 return log_link_warning_errno(link, r, "Could not update MAC for NDisc: %m");
3364 }
4f882b2a
TG		 3365 }
3366
bb262ef0
YW		 3367 old_master = link->master_ifindex;
3368 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
3369
d236718c 3370 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 3371 had_carrier = link_has_carrier(link);
3372
bb262ef0 3373 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 3374 if (r < 0)
3375 return r;
3376
d236718c
DS		 3377 if (!link_was_admin_up && (link->flags & IFF_UP)) {
3378 log_link_info(link, "Link UP");
3379
3380 r = link_admin_state_up(link);
3381 if (r < 0)
3382 return r;
3383 } else if (link_was_admin_up && !(link->flags & IFF_UP))
3384 log_link_info(link, "Link DOWN");
3385
273eec24
LP		 3386 r = link_update_lldp(link);
3387 if (r < 0)
3388 return r;
3389
a61bb41c
TG		 3390 carrier_gained = !had_carrier && link_has_carrier(link);
3391 carrier_lost = had_carrier && !link_has_carrier(link);
3392
3393 if (carrier_gained) {
6a7a4e4d 3394 log_link_info(link, "Gained carrier");
a61bb41c 3395
9c0a72f9
TG		 3396 r = link_carrier_gained(link);
3397 if (r < 0)
3398 return r;
a61bb41c 3399 } else if (carrier_lost) {
6a7a4e4d 3400 log_link_info(link, "Lost carrier");
a61bb41c 3401
9c0a72f9
TG		 3402 r = link_carrier_lost(link);
3403 if (r < 0)
a61bb41c 3404 return r;
a61bb41c
TG		 3405 }
3406
3407 return 0;
dd3efc09 3408}
fe8db0c5 3409
b295beea
LP		 3410static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3411 bool space = false;
b295beea
LP		 3412 Link *link;
3413
3414 assert(f);
3415 assert(prefix);
3416
3417 if (hashmap_isempty(h))
3418 return;
3419
0d536673 3420 fputs(prefix, f);
90e74a66 3421 HASHMAP_FOREACH(link, h) {
b295beea 3422 if (space)
0d536673 3423 fputc(' ', f);
b295beea
LP		 3424
3425 fprintf(f, "%i", link->ifindex);
3426 space = true;
3427 }
3428
0d536673 3429 fputc('\n', f);
b295beea
LP		 3430}
3431
64581765 3432static void link_save_dns(Link *link, FILE *f, struct in_addr_full **dns, unsigned n_dns, bool *space) {
dddc8d1e 3433 for (unsigned j = 0; j < n_dns; j++) {
e77bd3fd 3434 const char *str;
15761549 3435
64581765
YW		 3436 if (dns[j]->ifindex != 0 && dns[j]->ifindex != link->ifindex)
3437 continue;
3438
e77bd3fd
YW		 3439 str = in_addr_full_to_string(dns[j]);
3440 if (!str)
15761549 3441 continue;
15761549
YW		 3442
3443 if (*space)
3444 fputc(' ', f);
e77bd3fd 3445 fputs(str, f);
15761549
YW		 3446 *space = true;
3447 }
3448}
3449
d5e172d2
ZJS		 3450static void serialize_addresses(
3451 FILE *f,
3452 const char *lvalue,
3453 bool *space,
3454 char **addresses,
3455 sd_dhcp_lease *lease,
3456 bool conditional,
ddb82ec2 3457 sd_dhcp_lease_server_type what,
d5e172d2
ZJS		 3458 sd_dhcp6_lease *lease6,
3459 bool conditional6,
3460 int (*lease6_get_addr)(sd_dhcp6_lease*, const struct in6_addr**),
3461 int (*lease6_get_fqdn)(sd_dhcp6_lease*, char ***)) {
3462 int r;
3463
3464 bool _space = false;
3465 if (!space)
3466 space = &_space;
3467
3468 if (lvalue)
3469 fprintf(f, "%s=", lvalue);
3470 fputstrv(f, addresses, NULL, space);
3471
3472 if (lease && conditional) {
3473 const struct in_addr *lease_addresses;
3474
3475 r = sd_dhcp_lease_get_servers(lease, what, &lease_addresses);
3476 if (r > 0)
d8bff5cc 3477 serialize_in_addrs(f, lease_addresses, r, space, in4_addr_is_non_local);
d5e172d2
ZJS		 3478 }
3479
3480 if (lease6 && conditional6 && lease6_get_addr) {
3481 const struct in6_addr *in6_addrs;
3482
3483 r = lease6_get_addr(lease6, &in6_addrs);
d8bff5cc
ZJS		 3484 if (r > 0)
3485 serialize_in6_addrs(f, in6_addrs, r, space);
d5e172d2
ZJS		 3486 }
3487
3488 if (lease6 && conditional6 && lease6_get_fqdn) {
3489 char **in6_hosts;
3490
3491 r = lease6_get_fqdn(lease6, &in6_hosts);
3492 if (r > 0)
3493 fputstrv(f, in6_hosts, NULL, space);
3494 }
3495
3496 if (lvalue)
3497 fputc('\n', f);
3498}
3499
fe8db0c5 3500int link_save(Link *link) {
d361b373 3501 const char *admin_state, *oper_state, *carrier_state, *address_state;
68a8723c 3502 _cleanup_free_ char *temp_path = NULL;
fe8db0c5
TG		 3503 _cleanup_fclose_ FILE *f = NULL;
3504 int r;
3505
3506 assert(link);
3507 assert(link->state_file);
68a8723c 3508 assert(link->lease_file);
bbf7c048
TG		 3509 assert(link->manager);
3510
370e9930 3511 if (link->state == LINK_STATE_LINGER) {
6990fb6b 3512 (void) unlink(link->state_file);
370e9930
TG		 3513 return 0;
3514 }
3515
34437b4f
LP		 3516 link_lldp_save(link);
3517
deb2e523
TG		 3518 admin_state = link_state_to_string(link->state);
3519 assert(admin_state);
3520
e375dcde
TG		 3521 oper_state = link_operstate_to_string(link->operstate);
3522 assert(oper_state);
deb2e523 3523
ac999bf0
YW		 3524 carrier_state = link_carrier_state_to_string(link->carrier_state);
3525 assert(carrier_state);
3526
3527 address_state = link_address_state_to_string(link->address_state);
3528 assert(address_state);
3529
fe8db0c5
TG		 3530 r = fopen_temporary(link->state_file, &f, &temp_path);
3531 if (r < 0)
6a7a4e4d 3532 goto fail;
fe8db0c5 3533
5512a963 3534 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3535
3536 fprintf(f,
3537 "# This is private data. Do not parse.\n"
deb2e523 3538 "ADMIN_STATE=%s\n"
ac999bf0
YW		 3539 "OPER_STATE=%s\n"
3540 "CARRIER_STATE=%s\n"
3541 "ADDRESS_STATE=%s\n",
3542 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 3543
bcb7a07e 3544 if (link->network) {
fe0e16db
YW		 3545 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
3546 const char *dhcp_domainname = NULL, *p;
fe0e16db 3547 bool space;
07bdc70d 3548
c1a38904
MTL		 3549 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3550 yes_no(link->network->required_for_online));
3551
d5e172d2
ZJS		 3552 LinkOperationalStateRange st = link->network->required_operstate_for_online;
3553 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s%s%s\n",
3554 strempty(link_operstate_to_string(st.min)),
3555 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? ":" : "",
3556 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? strempty(link_operstate_to_string(st.max)) : "");
4ac77d63 3557
adc5b2e2
TG		 3558 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3559
d5e172d2
ZJS		 3560 /************************************************************/
3561
0d536673 3562 fputs("DNS=", f);
ea352b40 3563 space = false;
15761549 3564 if (link->n_dns != (unsigned) -1)
64581765 3565 link_save_dns(link, f, link->dns, link->n_dns, &space);
15761549 3566 else
64581765 3567 link_save_dns(link, f, link->network->dns, link->network->n_dns, &space);
d5314fff 3568
d5e172d2
ZJS		 3569 serialize_addresses(f, NULL, &space,
3570 NULL,
3571 link->dhcp_lease,
3572 link->network->dhcp_use_dns,
ddb82ec2 3573 SD_DHCP_LEASE_DNS,
1633c457 3574 link->dhcp6_lease,
d5e172d2
ZJS		 3575 link->network->dhcp6_use_dns,
3576 sd_dhcp6_lease_get_dns,
3577 NULL);
1e7a0e21 3578
a8c10331 3579 /* Make sure to flush out old entries before we use the NDisc data */
1e7a0e21
LP		 3580 ndisc_vacuum(link);
3581
b296797f 3582 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3583 NDiscRDNSS *dd;
3584
90e74a66 3585 SET_FOREACH(dd, link->ndisc_rdnss)
d8bff5cc 3586 serialize_in6_addrs(f, &dd->address, 1, &space);
299d578f
SS		 3587 }
3588
3589 fputc('\n', f);
3590
d5e172d2
ZJS		 3591 /************************************************************/
3592
3593 serialize_addresses(f, "NTP", NULL,
3594 link->ntp ?: link->network->ntp,
3595 link->dhcp_lease,
3596 link->network->dhcp_use_ntp,
ddb82ec2 3597 SD_DHCP_LEASE_NTP,
1633c457 3598 link->dhcp6_lease,
d5e172d2
ZJS		 3599 link->network->dhcp6_use_ntp,
3600 sd_dhcp6_lease_get_ntp_addrs,
3601 sd_dhcp6_lease_get_ntp_fqdn);
3602
3603 serialize_addresses(f, "SIP", NULL,
2a71d57f 3604 NULL,
d5e172d2
ZJS		 3605 link->dhcp_lease,
3606 link->network->dhcp_use_sip,
ddb82ec2 3607 SD_DHCP_LEASE_SIP,
2a71d57f 3608 NULL, false, NULL, NULL);
d5e172d2
ZJS		 3609
3610 /************************************************************/
bd8f6538 3611
b2a81c0b 3612 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3613 if (link->dhcp_lease) {
b2a81c0b 3614 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3615 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3616 }
1633c457
YW		 3617 if (link->dhcp6_lease)
3618 (void) sd_dhcp6_lease_get_domains(link->dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3619 }
3620
fe0e16db
YW		 3621 fputs("DOMAINS=", f);
3622 space = false;
90e74a66 3623 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains)
fe0e16db 3624 fputs_with_space(f, p, NULL, &space);
07bdc70d 3625
1e7a0e21 3626 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP		 3627 if (dhcp_domainname)
3628 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3629 if (dhcp_domains)
3630 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3631 if (dhcp6_domains)
3632 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 3633 }
3634
3635 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
3636 NDiscDNSSL *dd;
1e7a0e21 3637
90e74a66 3638 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 3639 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3640 }
b2a81c0b 3641
0d536673 3642 fputc('\n', f);
6192b846 3643
d5e172d2
ZJS		 3644 /************************************************************/
3645
fe0e16db
YW		 3646 fputs("ROUTE_DOMAINS=", f);
3647 space = false;
90e74a66 3648 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains)
fe0e16db 3649 fputs_with_space(f, p, NULL, &space);
b2a81c0b 3650
1e7a0e21 3651 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
1e7a0e21
LP		 3652 if (dhcp_domainname)
3653 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3654 if (dhcp_domains)
3655 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3656 if (dhcp6_domains)
3657 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 3658 }
3659
3660 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3661 NDiscDNSSL *dd;
1e7a0e21 3662
90e74a66 3663 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 3664 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3665 }
b2a81c0b 3666
0d536673 3667 fputc('\n', f);
67272d15 3668
d5e172d2
ZJS		 3669 /************************************************************/
3670
3c9b8860 3671 fprintf(f, "LLMNR=%s\n",
15761549 3672 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
d5e172d2
ZJS		 3673
3674 /************************************************************/
3675
aaa297d4 3676 fprintf(f, "MDNS=%s\n",
15761549 3677 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
15761549 3678
d5e172d2
ZJS		 3679 /************************************************************/
3680
3681 int dns_default_route =
3682 link->dns_default_route >= 0 ? link->dns_default_route :
3683 link->network->dns_default_route;
3684 if (dns_default_route >= 0)
3685 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(dns_default_route));
3686
3687 /************************************************************/
3688
3689 DnsOverTlsMode dns_over_tls_mode =
3690 link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID ? link->dns_over_tls_mode :
3691 link->network->dns_over_tls_mode;
3692 if (dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3693 fprintf(f, "DNS_OVER_TLS=%s\n", dns_over_tls_mode_to_string(dns_over_tls_mode));
3694
3695 /************************************************************/
3696
3697 DnssecMode dnssec_mode =
3698 link->dnssec_mode != _DNSSEC_MODE_INVALID ? link->dnssec_mode :
3699 link->network->dnssec_mode;
3700 if (dnssec_mode != _DNSSEC_MODE_INVALID)
3701 fprintf(f, "DNSSEC=%s\n", dnssec_mode_to_string(dnssec_mode));
3702
3703 /************************************************************/
3704
3705 Set *nta_anchors = link->dnssec_negative_trust_anchors;
3706 if (set_isempty(nta_anchors))
3707 nta_anchors = link->network->dnssec_negative_trust_anchors;
3708
3709 if (!set_isempty(nta_anchors)) {
8a516214
LP		 3710 const char *n;
3711
0d536673 3712 fputs("DNSSEC_NTA=", f);
8a516214 3713 space = false;
90e74a66 3714 SET_FOREACH(n, nta_anchors)
d390f8ef 3715 fputs_with_space(f, n, NULL, &space);
0d536673 3716 fputc('\n', f);
8a516214
LP		 3717 }
3718
d5e172d2
ZJS		 3719 /************************************************************/
3720
3b31e2b7
YW		 3721 r = link_serialize_addresses(link, f);
3722 if (r < 0)
3723 goto fail;
c1eb9872 3724
d5e172d2
ZJS		 3725 /************************************************************/
3726
56519412
YW		 3727 r = link_serialize_routes(link, f);
3728 if (r < 0)
3729 goto fail;
bcb7a07e 3730 }
7374f9d8 3731
b295beea
LP		 3732 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3733 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3734
8eb9058d 3735 if (link->dhcp_lease) {
bd91b83e 3736 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3737 if (r < 0)
c2d6bd61 3738 goto fail;
fe8db0c5 3739
7374f9d8 3740 fprintf(f,
b0e39c82
TG		 3741 "DHCP_LEASE=%s\n",
3742 link->lease_file);
deb2e523 3743 } else
6990fb6b 3744 (void) unlink(link->lease_file);
fe8db0c5 3745
0bc70f1d
TG		 3746 if (link->ipv4ll) {
3747 struct in_addr address;
3748
3749 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3750 if (r >= 0) {
0d536673 3751 fputs("IPV4LL_ADDRESS=", f);
072320ea 3752 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3753 fputc('\n', f);
0bc70f1d
TG		 3754 }
3755 }
3756
7e738e7b
SS		 3757 if (link->dhcp6_client) {
3758 _cleanup_free_ char *duid = NULL;
3759 uint32_t iaid;
3760
3761 r = sd_dhcp6_client_get_iaid(link->dhcp6_client, &iaid);
3762 if (r >= 0)
3763 fprintf(f, "DHCP6_CLIENT_IAID=0x%x\n", iaid);
3764
3765 r = sd_dhcp6_client_duid_as_string(link->dhcp6_client, &duid);
3766 if (r >= 0)
3767 fprintf(f, "DHCP6_CLIENT_DUID=%s\n", duid);
3768 }
18d8a2cf 3769
c2d6bd61
LP		 3770 r = fflush_and_check(f);
3771 if (r < 0)
3772 goto fail;
fe8db0c5 3773
c2d6bd61 3774 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3775 r = -errno;
c2d6bd61 3776 goto fail;
fe8db0c5
TG		 3777 }
3778
c2d6bd61 3779 return 0;
dacd6cee 3780
c2d6bd61 3781fail:
6a7a4e4d 3782 (void) unlink(link->state_file);
6a7a4e4d
LP		 3783 if (temp_path)
3784 (void) unlink(temp_path);
3785
dacd6cee 3786 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3787}
3788
84de38c5
TG		 3789/* The serialized state in /run is no longer up-to-date. */
3790void link_dirty(Link *link) {
3791 int r;
3792
3793 assert(link);
3794
0c241a37
SS		 3795 /* mark manager dirty as link is dirty */
3796 manager_dirty(link->manager);
3797
de7fef4b 3798 r = set_ensure_put(&link->manager->dirty_links, NULL, link);
0c241a37 3799 if (r <= 0)
de7fef4b 3800 /* Ignore allocation errors and don't take another ref if the link was already dirty */
84de38c5 3801 return;
84de38c5
TG		 3802 link_ref(link);
3803}
3804
3805/* The serialized state in /run is up-to-date */
3806void link_clean(Link *link) {
3807 assert(link);
3808 assert(link->manager);
3809
1046bf9b 3810 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 3811}
3812
c2a65950
YW		 3813int link_save_and_clean(Link *link) {
3814 int r;
3815
3816 r = link_save(link);
3817 if (r < 0)
3818 return r;
3819
3820 link_clean(link);
3821 return 0;
3822}
3823
fe8db0c5 3824static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3825 [LINK_STATE_PENDING] = "pending",
bd08ce56 3826 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 3827 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 3828 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3829 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3830 [LINK_STATE_FAILED] = "failed",
370e9930 3831 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3832};
3833
3834DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
5ecb131d
YW		 3835
3836int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg) {
3837 const char *err_msg = NULL;
3838
3839 (void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg);
d157714b
YW		 3840 return log_link_full_errno(link, level, err,
3841 "%s: %s%s%s%m",
3842 msg,
3843 strempty(err_msg),
3844 err_msg && !endswith(err_msg, ".") ? "." : "",
3845 err_msg ? " " : "");
5ecb131d 3846}
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