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network: move link_ipv6_accept_ra_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
b9d74c40
LP		 64static bool link_dhcp4_server_enabled(Link *link) {
65 assert(link);
66
78c958f8
TG		 67 if (link->flags & IFF_LOOPBACK)
68 return false;
69
70 if (!link->network)
71 return false;
72
f2bfcdb9
YW		 73 if (link->network->bond)
74 return false;
75
500b96eb 76 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 77 return false;
78
78c958f8
TG		 79 return link->network->dhcp_server;
80}
81
2d792895 82bool link_ipv4ll_enabled(Link *link, AddressFamily mask) {
b9d74c40 83 assert(link);
910feb78 84 assert((mask & ~(ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) == 0);
b9d74c40 85
78c958f8
TG		 86 if (link->flags & IFF_LOOPBACK)
87 return false;
88
89 if (!link->network)
90 return false;
91
500b96eb 92 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 93 return false;
94
98d20a17 95 if (STRPTR_IN_SET(link->kind,
96 "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
b0486c73 97 "vti6", "nlmon", "xfrm", "bareudp"))
a8f5bba6
JD		 98 return false;
99
f410d463
YW		 100 /* L3 or L3S mode do not support ARP. */
101 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
102 return false;
103
f2bfcdb9
YW		 104 if (link->network->bond)
105 return false;
106
910feb78 107 return link->network->link_local & mask;
8bc17bb3
SS		 108}
109
f8f2f880 110bool link_ipv6ll_enabled(Link *link) {
b9d74c40
LP		 111 assert(link);
112
fa709992
LP		 113 if (!socket_ipv6_is_supported())
114 return false;
115
d0d6a4cd
TG		 116 if (link->flags & IFF_LOOPBACK)
117 return false;
118
119 if (!link->network)
120 return false;
121
500b96eb 122 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 123 return false;
124
125 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon"))
a8f5bba6
JD		 126 return false;
127
f2bfcdb9
YW		 128 if (link->network->bond)
129 return false;
130
e0ee46f2 131 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 132}
133
439689c6
SS		 134static bool link_ipv6_enabled(Link *link) {
135 assert(link);
136
137 if (!socket_ipv6_is_supported())
138 return false;
139
b102cdca 140 if (link->network->bond)
2b00a4e0
TY		 141 return false;
142
500b96eb 143 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 144 return false;
145
4cef7fe3 146 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
adfeee49
YW		 147 if (link_ipv6ll_enabled(link))
148 return true;
149
150 if (network_has_static_ipv6_configurations(link->network))
151 return true;
152
153 return false;
439689c6
SS		 154}
155
7465dd22
PF		 156static bool link_radv_enabled(Link *link) {
157 assert(link);
158
159 if (!link_ipv6ll_enabled(link))
160 return false;
161
55a7c78b 162 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 163}
164
6f7a17ff 165bool link_ip_forward_enabled(Link *link, int family) {
b9d74c40 166 assert(link);
6f7a17ff 167 assert(IN_SET(family, AF_INET, AF_INET6));
b9d74c40 168
6f7a17ff 169 if (family == AF_INET6 && !socket_ipv6_is_supported())
765afd5c
LP		 170 return false;
171
769d324c
LP		 172 if (link->flags & IFF_LOOPBACK)
173 return false;
174
175 if (!link->network)
176 return false;
177
6f7a17ff 178 return link->network->ip_forward & (family == AF_INET ? ADDRESS_FAMILY_IPV4 : ADDRESS_FAMILY_IPV6);
5a8bcb67
LP		 179}
180
23d8b221
SS		 181static bool link_proxy_arp_enabled(Link *link) {
182 assert(link);
183
184 if (link->flags & IFF_LOOPBACK)
185 return false;
186
187 if (!link->network)
188 return false;
189
190 if (link->network->proxy_arp < 0)
191 return false;
192
193 return true;
194}
195
1f0d9695 196static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 197 assert(link);
d68e2e59
LP		 198
199 if (!socket_ipv6_is_supported())
200 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
201
49092e22 202 if (link->flags & IFF_LOOPBACK)
1f0d9695 203 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 204
205 if (!link->network)
1f0d9695 206 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 207
208 return link->network->ipv6_privacy_extensions;
209}
210
57ad7607 211static int link_update_ipv6_sysctl(Link *link) {
482efedc 212 bool enabled;
439689c6
SS		 213 int r;
214
215 if (link->flags & IFF_LOOPBACK)
216 return 0;
217
482efedc
SS		 218 enabled = link_ipv6_enabled(link);
219 if (enabled) {
220 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", false);
221 if (r < 0)
57ad7607
ZJS		 222 return log_link_warning_errno(link, r, "Cannot enable IPv6: %m");
223
224 log_link_info(link, "IPv6 successfully enabled");
482efedc 225 }
439689c6
SS		 226
227 return 0;
228}
229
34bf3c00
YW		 230static bool link_is_enslaved(Link *link) {
231 if (link->flags & IFF_SLAVE)
232 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
233 return true;
234
34bf3c00
YW		 235 if (!link->network)
236 return false;
237
bb262ef0 238 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 239 return true;
240
bb262ef0
YW		 241 /* TODO: add conditions for other netdevs. */
242
34bf3c00
YW		 243 return false;
244}
245
45e11abf
YW		 246static void link_update_master_operstate(Link *link, NetDev *netdev) {
247 Link *master;
248
249 if (!netdev)
250 return;
251
7936917e
YW		 252 if (netdev->ifindex <= 0)
253 return;
254
45e11abf
YW		 255 if (link_get(link->manager, netdev->ifindex, &master) < 0)
256 return;
257
258 link_update_operstate(master, true);
259}
260
261void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 262 LinkOperationalState operstate;
1678fbb3
YW		 263 LinkCarrierState carrier_state;
264 LinkAddressState address_state;
35c5a9ca 265 _cleanup_strv_free_ char **p = NULL;
1678fbb3 266 uint8_t scope = RT_SCOPE_NOWHERE;
35c5a9ca 267 bool changed = false;
1678fbb3 268 Address *address;
14153d1b 269
84de38c5
TG		 270 assert(link);
271
272 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 273 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 274 else if (link_has_carrier(link)) {
1678fbb3
YW		 275 if (link_is_enslaved(link))
276 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 277 else
1678fbb3 278 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 279 } else if (link->flags & IFF_UP)
1678fbb3 280 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 281 else
1678fbb3 282 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 283
1678fbb3 284 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 285 Link *slave;
286
90e74a66 287 SET_FOREACH(slave, link->slaves) {
959f65d3 288 link_update_operstate(slave, false);
84de38c5 289
1678fbb3
YW		 290 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
291 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 292 }
959f65d3 293 }
84de38c5 294
90e74a66 295 SET_FOREACH(address, link->addresses) {
1678fbb3
YW		 296 if (!address_is_ready(address))
297 continue;
84de38c5 298
1678fbb3
YW		 299 if (address->scope < scope)
300 scope = address->scope;
301 }
84de38c5 302
1678fbb3 303 /* for operstate we also take foreign addresses into account */
90e74a66 304 SET_FOREACH(address, link->addresses_foreign) {
1678fbb3
YW		 305 if (!address_is_ready(address))
306 continue;
307
308 if (address->scope < scope)
309 scope = address->scope;
310 }
311
312 if (scope < RT_SCOPE_SITE)
313 /* universally accessible addresses found */
314 address_state = LINK_ADDRESS_STATE_ROUTABLE;
315 else if (scope < RT_SCOPE_HOST)
316 /* only link or site local addresses found */
317 address_state = LINK_ADDRESS_STATE_DEGRADED;
84de38c5 318 else
1678fbb3
YW		 319 /* no useful addresses found */
320 address_state = LINK_ADDRESS_STATE_OFF;
321
322 /* Mapping of address and carrier state vs operational state
323 * carrier state
324 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
325 * ------------------------------------------------------------------------------
326 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
327 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
328 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
329 */
84de38c5 330
1678fbb3
YW		 331 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
332 operstate = (LinkOperationalState) carrier_state;
333 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
334 operstate = LINK_OPERSTATE_ROUTABLE;
335 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
336 operstate = LINK_OPERSTATE_DEGRADED;
337 else
14153d1b
YW		 338 operstate = LINK_OPERSTATE_ENSLAVED;
339
35c5a9ca
YW		 340 if (link->carrier_state != carrier_state) {
341 link->carrier_state = carrier_state;
342 changed = true;
343 if (strv_extend(&p, "CarrierState") < 0)
344 log_oom();
345 }
959f65d3 346
35c5a9ca
YW		 347 if (link->address_state != address_state) {
348 link->address_state = address_state;
349 changed = true;
350 if (strv_extend(&p, "AddressState") < 0)
351 log_oom();
959f65d3
YW		 352 }
353
84de38c5
TG		 354 if (link->operstate != operstate) {
355 link->operstate = operstate;
35c5a9ca
YW		 356 changed = true;
357 if (strv_extend(&p, "OperationalState") < 0)
358 log_oom();
84de38c5 359 }
959f65d3 360
35c5a9ca
YW		 361 if (p)
362 link_send_changed_strv(link, p);
363 if (changed)
364 link_dirty(link);
365
45e11abf
YW		 366 if (also_update_master && link->network) {
367 link_update_master_operstate(link, link->network->bond);
368 link_update_master_operstate(link, link->network->bridge);
959f65d3 369 }
84de38c5
TG		 370}
371
51d18171
TG		 372#define FLAG_STRING(string, flag, old, new) \
373 (((old ^ new) & flag) \
374 ? ((old & flag) ? (" -" string) : (" +" string)) \
375 : "")
376
bb262ef0 377static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 378 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
379 uint8_t operstate;
380 int r;
381
382 assert(link);
383
384 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 385 if (r < 0)
386 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 387
1c4baffc 388 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 389 if (r < 0)
390 /* if we got a message without operstate, take it to mean
391 the state was unchanged */
392 operstate = link->kernel_operstate;
393
bb262ef0 394 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 395 return 0;
396
397 if (link->flags != flags) {
6a7a4e4d 398 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		 399 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
400 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
401 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
402 FLAG_STRING("UP", IFF_UP, link->flags, flags),
403 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
404 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
405 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
406 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
407 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
408 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
409 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
410 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
411 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
412 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
413 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
414 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
415 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
416 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
417 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
418
419 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
420 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
421 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
422 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
423 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
424 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
425 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
426 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
427
428 /* link flags are currently at most 18 bits, let's align to
429 * printing 20 */
430 if (unknown_flags_added)
79008bdd 431 log_link_debug(link,
6a7a4e4d 432 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 433 unknown_flags_added);
434
435 if (unknown_flags_removed)
79008bdd 436 log_link_debug(link,
6a7a4e4d 437 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 438 unknown_flags_removed);
439 }
440
441 link->flags = flags;
442 link->kernel_operstate = operstate;
443
959f65d3 444 link_update_operstate(link, true);
51d18171
TG		 445
446 return 0;
447}
448
1c4baffc 449static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 450 _cleanup_(link_unrefp) Link *link = NULL;
6cad256d 451 const char *ifname, *kind = NULL;
b710e6b6 452 unsigned short iftype;
572b21d9
YW		 453 int r, ifindex;
454 uint16_t type;
f579559b 455
0c2f9b84 456 assert(manager);
505f8da7 457 assert(message);
f579559b
TG		 458 assert(ret);
459
6cad256d
TJ		 460 /* check for link kind */
461 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
462 if (r == 0) {
db2f8a2e 463 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 464 r = sd_netlink_message_exit_container(message);
465 if (r < 0)
466 return r;
467 }
468
1c4baffc 469 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 470 if (r < 0)
471 return r;
472 else if (type != RTM_NEWLINK)
473 return -EINVAL;
474
475 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
476 if (r < 0)
477 return r;
478 else if (ifindex <= 0)
479 return -EINVAL;
480
b710e6b6
LP		 481 r = sd_rtnl_message_link_get_type(message, &iftype);
482 if (r < 0)
483 return r;
484
1c4baffc 485 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 486 if (r < 0)
487 return r;
488
17f9c355 489 link = new(Link, 1);
f579559b
TG		 490 if (!link)
491 return -ENOMEM;
492
17f9c355
YW		 493 *link = (Link) {
494 .n_ref = 1,
495 .manager = manager,
496 .state = LINK_STATE_PENDING,
17f9c355
YW		 497 .ifindex = ifindex,
498 .iftype = iftype,
15761549
YW		 499
500 .n_dns = (unsigned) -1,
501 .dns_default_route = -1,
502 .llmnr = _RESOLVE_SUPPORT_INVALID,
503 .mdns = _RESOLVE_SUPPORT_INVALID,
504 .dnssec_mode = _DNSSEC_MODE_INVALID,
505 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
17f9c355
YW		 506 };
507
505f8da7
TG		 508 link->ifname = strdup(ifname);
509 if (!link->ifname)
510 return -ENOMEM;
f579559b 511
6cad256d
TJ		 512 if (kind) {
513 link->kind = strdup(kind);
514 if (!link->kind)
515 return -ENOMEM;
516 }
517
cbff7170
TJ		 518 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
519 if (r < 0)
520 log_link_debug_errno(link, r, "New device has no master, continuing without");
521
1c4baffc 522 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 523 if (r < 0)
34437b4f 524 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 525
c643bda5 526 r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac);
4bb7cc82
YW		 527 if (r < 0)
528 log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
529
c643bda5
YW		 530 r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver);
531 if (r < 0)
532 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
533
572b21d9
YW		 534 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &link->alternative_names);
535 if (r < 0 && r != -ENODATA)
536 return r;
537
34437b4f 538 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 539 return -ENOMEM;
fe8db0c5 540
34437b4f 541 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 542 return -ENOMEM;
543
34437b4f 544 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 545 return -ENOMEM;
546
d5099efc 547 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 548 if (r < 0)
549 return r;
550
551 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 552 if (r < 0)
553 return r;
554
bb262ef0 555 r = link_update_flags(link, message, false);
51d18171
TG		 556 if (r < 0)
557 return r;
558
1cc6c93a 559 *ret = TAKE_PTR(link);
f579559b
TG		 560
561 return 0;
562}
563
15761549
YW		 564void link_ntp_settings_clear(Link *link) {
565 link->ntp = strv_free(link->ntp);
566}
567
568void link_dns_settings_clear(Link *link) {
e77bd3fd
YW		 569 if (link->n_dns != (unsigned) -1)
570 for (unsigned i = 0; i < link->n_dns; i++)
571 in_addr_full_free(link->dns[i]);
15761549
YW		 572 link->dns = mfree(link->dns);
573 link->n_dns = (unsigned) -1;
574
575 link->search_domains = ordered_set_free_free(link->search_domains);
576 link->route_domains = ordered_set_free_free(link->route_domains);
577
578 link->dns_default_route = -1;
579 link->llmnr = _RESOLVE_SUPPORT_INVALID;
580 link->mdns = _RESOLVE_SUPPORT_INVALID;
581 link->dnssec_mode = _DNSSEC_MODE_INVALID;
582 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
583
584 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
585}
586
1a6bb31f
YW		 587static void link_free_engines(Link *link) {
588 if (!link)
589 return;
590
591 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
592 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
593 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
1a6bb31f
YW		 594
595 link->lldp = sd_lldp_unref(link->lldp);
596
597 ndisc_flush(link);
598
599 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
600 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 601 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
1a6bb31f
YW		 602 link->ndisc = sd_ndisc_unref(link->ndisc);
603 link->radv = sd_radv_unref(link->radv);
604}
605
8301aa0b 606static Link *link_free(Link *link) {
8301aa0b 607 assert(link);
f579559b 608
15761549
YW		 609 link_ntp_settings_clear(link);
610 link_dns_settings_clear(link);
611
8eec0b9d
YW		 612 link->routes = set_free(link->routes);
613 link->routes_foreign = set_free(link->routes_foreign);
6e537f62
YW		 614 link->dhcp_routes = set_free(link->dhcp_routes);
615 link->dhcp_routes_old = set_free(link->dhcp_routes_old);
1633c457
YW		 616 link->dhcp6_routes = set_free(link->dhcp6_routes);
617 link->dhcp6_routes_old = set_free(link->dhcp6_routes_old);
618 link->dhcp6_pd_routes = set_free(link->dhcp6_pd_routes);
619 link->dhcp6_pd_routes_old = set_free(link->dhcp6_pd_routes_old);
69203fba 620 link->ndisc_routes = set_free(link->ndisc_routes);
adda1ed9 621
8eec0b9d
YW		 622 link->nexthops = set_free(link->nexthops);
623 link->nexthops_foreign = set_free(link->nexthops_foreign);
c16c7808 624
8eec0b9d
YW		 625 link->neighbors = set_free(link->neighbors);
626 link->neighbors_foreign = set_free(link->neighbors_foreign);
d1bdafd2 627
8eec0b9d
YW		 628 link->addresses = set_free(link->addresses);
629 link->addresses_foreign = set_free(link->addresses_foreign);
aa651e88 630 link->pool_addresses = set_free(link->pool_addresses);
e5526518 631 link->static_addresses = set_free(link->static_addresses);
1633c457
YW		 632 link->dhcp6_addresses = set_free(link->dhcp6_addresses);
633 link->dhcp6_addresses_old = set_free(link->dhcp6_addresses_old);
634 link->dhcp6_pd_addresses = set_free(link->dhcp6_pd_addresses);
635 link->dhcp6_pd_addresses_old = set_free(link->dhcp6_pd_addresses_old);
69203fba 636 link->ndisc_addresses = set_free(link->ndisc_addresses);
adda1ed9 637
7272b25e 638 link_lldp_emit_stop(link);
1a6bb31f 639 link_free_engines(link);
68a8723c 640 free(link->lease_file);
49699bac
SS		 641 free(link->lldp_file);
642
c166a070 643 free(link->ifname);
572b21d9 644 strv_free(link->alternative_names);
ceac4078 645 free(link->kind);
8d968fdd 646 free(link->ssid);
c643bda5 647 free(link->driver);
6cad256d 648
db2f8a2e 649 (void) unlink(link->state_file);
fe8db0c5 650 free(link->state_file);
c166a070 651
51517f9e 652 sd_device_unref(link->sd_device);
b5db00e5 653
0d4ad91d 654 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 655 hashmap_free(link->bound_by_links);
656
5f707e12 657 set_free_with_destructor(link->slaves, link_unref);
033295c1 658
c9c908a6
YW		 659 network_unref(link->network);
660
8301aa0b 661 return mfree(link);
14b746f7
TG		 662}
663
8301aa0b 664DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 665
11a7f229
TG		 666int link_get(Manager *m, int ifindex, Link **ret) {
667 Link *link;
11a7f229
TG		 668
669 assert(m);
e856ed00 670 assert(ifindex > 0);
11a7f229
TG		 671 assert(ret);
672
ae06ab10 673 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 674 if (!link)
675 return -ENODEV;
676
677 *ret = link;
678
679 return 0;
680}
681
af9ba57a 682void link_set_state(Link *link, LinkState state) {
e331e246
TG		 683 assert(link);
684
685 if (link->state == state)
686 return;
687
0beb9542
YW		 688 log_link_debug(link, "State changed: %s -> %s",
689 link_state_to_string(link->state),
690 link_state_to_string(state));
691
e331e246
TG		 692 link->state = state;
693
694 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 695}
696
57bd6899
TG		 697static void link_enter_unmanaged(Link *link) {
698 assert(link);
699
e331e246 700 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 701
84de38c5 702 link_dirty(link);
57bd6899
TG		 703}
704
95355a28 705int link_stop_clients(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 706 int r = 0, k;
707
708 assert(link);
709 assert(link->manager);
710 assert(link->manager->event);
711
80060352
ZJS		 712 bool keep_dhcp = may_keep_dhcp &&
713 link->network &&
714 (link->manager->restarting ||
715 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
716
717 if (link->dhcp_client && !keep_dhcp) {
111bb8f9 718 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 719 if (k < 0)
36c7d709 720 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 721 }
722
ba179154 723 if (link->ipv4ll) {
111bb8f9 724 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 725 if (k < 0)
36c7d709 726 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 727 }
728
2488e4d9
YW		 729 k = link_stop_ipv4_dad(link);
730 if (k < 0)
731 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
051e77ca 732
f5a8c43f
TG		 733 if (link->dhcp6_client) {
734 k = sd_dhcp6_client_stop(link->dhcp6_client);
735 if (k < 0)
36c7d709 736 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 737 }
4138fb2c 738
1633c457
YW		 739 if (link_dhcp6_pd_is_enabled(link)) {
740 k = dhcp6_pd_remove(link);
741 if (k < 0)
742 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
743 }
744
1e7a0e21
LP		 745 if (link->ndisc) {
746 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 747 if (k < 0)
36c7d709 748 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 749 }
750
7465dd22 751 if (link->radv) {
290696e5 752 k = sd_radv_stop(link->radv);
7465dd22
PF		 753 if (k < 0)
754 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
755 }
756
7272b25e 757 link_lldp_emit_stop(link);
111bb8f9
TG		 758 return r;
759}
760
b22d8a00 761void link_enter_failed(Link *link) {
ef1ba606 762 assert(link);
f882c247 763
370e9930 764 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 765 return;
766
6a7a4e4d 767 log_link_warning(link, "Failed");
449f7554 768
e331e246 769 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 770
95355a28 771 link_stop_clients(link, false);
111bb8f9 772
84de38c5 773 link_dirty(link);
f882c247
TG		 774}
775
7033af49
YW		 776static int link_join_netdevs_after_configured(Link *link) {
777 NetDev *netdev;
7033af49
YW		 778 int r;
779
90e74a66 780 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7033af49
YW		 781 if (netdev->ifindex > 0)
782 /* Assume already enslaved. */
783 continue;
784
785 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
786 continue;
787
788 log_struct(LOG_DEBUG,
789 LOG_LINK_INTERFACE(link),
790 LOG_NETDEV_INTERFACE(netdev),
791 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
792
793 r = netdev_join(netdev, link, NULL);
794 if (r < 0)
795 return log_struct_errno(LOG_WARNING, r,
796 LOG_LINK_INTERFACE(link),
797 LOG_NETDEV_INTERFACE(netdev),
798 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
799 }
800
801 return 0;
802}
803
e3a7b048 804static void link_enter_configured(Link *link) {
dd43110f
TG		 805 assert(link);
806 assert(link->network);
e3a7b048 807
289e6774 808 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 809 return;
dd43110f 810
e331e246 811 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 812
7033af49
YW		 813 (void) link_join_netdevs_after_configured(link);
814
84de38c5 815 link_dirty(link);
dd43110f
TG		 816}
817
6accfd31
DA		 818void link_check_ready(Link *link) {
819 Address *a;
6accfd31
DA		 820
821 assert(link);
822
5f58af25
YW		 823 if (link->state == LINK_STATE_CONFIGURED)
824 return;
825
826 if (link->state != LINK_STATE_CONFIGURING) {
827 log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31 828 return;
39373cb9 829 }
6accfd31
DA		 830
831 if (!link->network)
832 return;
833
39373cb9
YW		 834 if (!link->addresses_configured) {
835 log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 836 return;
39373cb9 837 }
6accfd31 838
39373cb9
YW		 839 if (!link->neighbors_configured) {
840 log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
6accfd31 841 return;
39373cb9 842 }
6accfd31 843
90e74a66 844 SET_FOREACH(a, link->addresses)
39373cb9
YW		 845 if (!address_is_ready(a)) {
846 _cleanup_free_ char *str = NULL;
847
848 (void) in_addr_to_string(a->family, &a->in_addr, &str);
849 log_link_debug(link, "%s(): an address %s/%d is not ready.", __func__, strnull(str), a->prefixlen);
6aa5773b 850 return;
39373cb9 851 }
6aa5773b 852
39373cb9
YW		 853 if (!link->static_routes_configured) {
854 log_link_debug(link, "%s(): static routes are not configured.", __func__);
6accfd31 855 return;
39373cb9 856 }
6accfd31 857
39373cb9
YW		 858 if (!link->static_nexthops_configured) {
859 log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 860 return;
39373cb9 861 }
c16c7808 862
39373cb9
YW		 863 if (!link->routing_policy_rules_configured) {
864 log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 865 return;
39373cb9 866 }
6accfd31 867
39373cb9
YW		 868 if (!link->tc_configured) {
869 log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
4ecdcb07 870 return;
39373cb9 871 }
4ecdcb07 872
39373cb9
YW		 873 if (!link->sr_iov_configured) {
874 log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 875 return;
39373cb9 876 }
518cd6b5 877
1f241589
YW		 878 if (!link->bridge_mdb_configured) {
879 log_link_debug(link, "%s(): Bridge MDB is not configured.", __func__);
880 return;
881 }
882
463797c1 883 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
50550722
YW		 884 bool has_ndisc_address = false;
885 NDiscAddress *n;
6accfd31 886
1c09d84e 887 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !link->ipv4ll_address_configured) {
39373cb9 888 log_link_debug(link, "%s(): IPv4LL is not configured.", __func__);
463797c1 889 return;
39373cb9 890 }
6accfd31 891
463797c1 892 if (link_ipv6ll_enabled(link) &&
39373cb9
YW		 893 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
894 log_link_debug(link, "%s(): IPv6LL is not configured.", __func__);
463797c1 895 return;
39373cb9 896 }
6accfd31 897
90e74a66 898 SET_FOREACH(n, link->ndisc_addresses)
50550722
YW		 899 if (!n->marked) {
900 has_ndisc_address = true;
901 break;
902 }
903
15797d6a 904 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
50550722 905 !link->dhcp_address && set_isempty(link->dhcp6_addresses) && !has_ndisc_address &&
15797d6a
YW		 906 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
907 log_link_debug(link, "%s(): DHCP4 or DHCP6 is enabled but no dynamic address is assigned yet.", __func__);
659ad3a0
YW		 908 return;
909 }
910
1633c457 911 if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_dhcp6_pd_is_enabled(link) || link_ipv6_accept_ra_enabled(link)) {
39373cb9
YW		 912 if (!link->dhcp4_configured &&
913 !(link->dhcp6_address_configured && link->dhcp6_route_configured) &&
914 !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) &&
d98c546d 915 !(link->ndisc_addresses_configured && link->ndisc_routes_configured) &&
1c09d84e 916 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
39373cb9
YW		 917 /* When DHCP or RA is enabled, at least one protocol must provide an address, or
918 * an IPv4ll fallback address must be configured. */
919 log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
920 return;
921 }
922
d98c546d 923 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		 924 __func__,
925 yes_no(link->dhcp4_configured),
926 yes_no(link->dhcp6_address_configured),
927 yes_no(link->dhcp6_route_configured),
928 yes_no(link->dhcp6_pd_address_configured),
929 yes_no(link->dhcp6_pd_route_configured),
d98c546d
YW		 930 yes_no(link->ndisc_addresses_configured),
931 yes_no(link->ndisc_routes_configured));
39373cb9 932 }
463797c1 933 }
6accfd31 934
5f58af25 935 link_enter_configured(link);
6accfd31
DA		 936
937 return;
938}
939
682c65b0 940static int link_set_static_configs(Link *link) {
f882c247
TG		 941 int r;
942
943 assert(link);
944 assert(link->network);
f5be5601 945 assert(link->state != _LINK_STATE_INVALID);
f882c247 946
2428613f 947 /* Reset all *_configured flags we are configuring. */
9b966cee 948 link->request_static_addresses = false;
2428613f 949 link->addresses_configured = false;
6aa5773b 950 link->addresses_ready = false;
2428613f
YW		 951 link->neighbors_configured = false;
952 link->static_routes_configured = false;
c16c7808 953 link->static_nexthops_configured = false;
2428613f
YW		 954 link->routing_policy_rules_configured = false;
955
f6bb7ac5
TJ		 956 r = link_set_bridge_fdb(link);
957 if (r < 0)
958 return r;
959
1f241589
YW		 960 r = link_set_bridge_mdb(link);
961 if (r < 0)
962 return r;
963
58f1fe9a 964 r = link_set_neighbors(link);
f3ef324d
YW		 965 if (r < 0)
966 return r;
e4a71bf3 967
682c65b0
YW		 968 r = link_set_addresses(link);
969 if (r < 0)
970 return r;
bd6379ec 971
fe2bc17c
YW		 972 r = link_set_address_labels(link);
973 if (r < 0)
974 return r;
f882c247 975
e5526518 976 /* now that we can figure out a default address for the dhcp server, start it */
708c425d 977 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
8fcf1d61 978 r = dhcp4_server_configure(link);
4ff296b0 979 if (r < 0)
d4cdbea5 980 return r;
6a7a4e4d 981 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 982 }
983
f882c247
TG		 984 return 0;
985}
986
13b498f9 987static int link_set_bridge_vlan(Link *link) {
86e2be7b 988 int r;
13b498f9
TJ		 989
990 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
991 if (r < 0)
992 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
993
994 return r;
995}
996
a60a720c 997static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 998 int r;
999
1000 if (!link_proxy_arp_enabled(link))
1001 return 0;
1002
62e021a9 1003 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1004 if (r < 0)
1005 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1006
1007 return 0;
1008}
1009
3a390124 1010static int link_configure_continue(Link *link);
55dc8c4a 1011
302a796f 1012static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1013 int r;
1014
1015 assert(m);
1016 assert(link);
1017 assert(link->ifname);
1018
55dc8c4a
YW		 1019 link->setting_mtu = false;
1020
5da8149f 1021 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1022 return 1;
1023
1c4baffc 1024 r = sd_netlink_message_get_errno(m);
4ff296b0 1025 if (r < 0)
5ecb131d 1026 log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring");
4ff296b0
YW		 1027 else
1028 log_link_debug(link, "Setting MTU done.");
55dc8c4a 1029
4ff296b0 1030 if (link->state == LINK_STATE_INITIALIZED) {
3a390124 1031 r = link_configure_continue(link);
4ff296b0
YW		 1032 if (r < 0)
1033 link_enter_failed(link);
1034 }
4f882b2a
TG		 1035
1036 return 1;
1037}
1038
933c70a0 1039int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1040 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1041 int r;
1042
1043 assert(link);
1044 assert(link->manager);
1045 assert(link->manager->rtnl);
1046
40288ece
YW		 1047 if (mtu == 0 || link->setting_mtu)
1048 return 0;
1049
933c70a0 1050 if (link->mtu == mtu)
ee493106
YW		 1051 return 0;
1052
6a7a4e4d 1053 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1054
6a7a4e4d
LP		 1055 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1056 if (r < 0)
1057 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1058
44b598a1 1059 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1060 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1061 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1062
1063 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
d236718c 1064 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes");
44b598a1 1065
72c2500b 1066 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1067 }
1068
1c4baffc 1069 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1070 if (r < 0)
1071 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1072
302a796f
YW		 1073 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1074 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1075 if (r < 0)
1076 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1077
ae941762 1078 link_ref(link);
1046bf9b 1079 link->setting_mtu = true;
b226d99b 1080
4f882b2a
TG		 1081 return 0;
1082}
1083
f6fcc1c2
YW		 1084static bool link_reduces_vlan_mtu(Link *link) {
1085 /* See netif_reduces_vlan_mtu() in kernel. */
1086 return streq_ptr(link->kind, "macsec");
1087}
1088
1089static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1090 uint32_t mtu = 0;
1091 NetDev *dev;
f6fcc1c2 1092
90e74a66 1093 HASHMAP_FOREACH(dev, link->network->stacked_netdevs)
f6fcc1c2
YW		 1094 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1095 /* See vlan_dev_change_mtu() in kernel. */
1096 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1097
1098 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1099 /* See macvlan_change_mtu() in kernel. */
1100 mtu = dev->mtu;
1101
1102 return mtu;
1103}
1104
1105static int link_configure_mtu(Link *link) {
1106 uint32_t mtu;
1107
1108 assert(link);
1109 assert(link->network);
1110
1111 if (link->network->mtu > 0)
1112 return link_set_mtu(link, link->network->mtu);
1113
1114 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1115 if (link->mtu >= mtu)
1116 return 0;
1117
1118 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1119 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1120 link->mtu, mtu);
1121
1122 return link_set_mtu(link, mtu);
1123}
1124
302a796f 1125static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1126 int r;
1127
1128 assert(m);
1129 assert(link);
1130 assert(link->ifname);
1131
1132 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1133 return 1;
1134
1135 r = sd_netlink_message_get_errno(m);
1136 if (r < 0)
5ecb131d 1137 log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring");
99d2baa2
SS		 1138
1139 return 1;
1140}
1141
1142static int link_set_flags(Link *link) {
1143 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1144 unsigned ifi_change = 0;
1145 unsigned ifi_flags = 0;
1146 int r;
1147
1148 assert(link);
1149 assert(link->manager);
1150 assert(link->manager->rtnl);
1151
1152 if (link->flags & IFF_LOOPBACK)
1153 return 0;
1154
1155 if (!link->network)
1156 return 0;
1157
866e6b7a 1158 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1159 return 0;
1160
1161 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1162 if (r < 0)
1163 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1164
1165 if (link->network->arp >= 0) {
1166 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1167 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1168 }
1169
1170 if (link->network->multicast >= 0) {
1171 ifi_change |= IFF_MULTICAST;
1172 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1173 }
1174
866e6b7a
SS		 1175 if (link->network->allmulticast >= 0) {
1176 ifi_change |= IFF_ALLMULTI;
1177 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1178 }
1179
99d2baa2
SS		 1180 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1181 if (r < 0)
1182 return log_link_error_errno(link, r, "Could not set link flags: %m");
1183
302a796f
YW		 1184 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1185 link_netlink_destroy_callback, link);
99d2baa2
SS		 1186 if (r < 0)
1187 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1188
1189 link_ref(link);
1190
1191 return 0;
1192}
1193
e7ab854c
TG		 1194static int link_acquire_ipv6_conf(Link *link) {
1195 int r;
1196
1197 assert(link);
1198
e7ab854c 1199 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1200 assert(link->ndisc);
e7ab854c
TG		 1201
1202 log_link_debug(link, "Discovering IPv6 routers");
1203
1e7a0e21 1204 r = sd_ndisc_start(link->ndisc);
63348d13 1205 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1206 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1207 }
1208
7465dd22
PF		 1209 if (link_radv_enabled(link)) {
1210 assert(link->radv);
1211 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1212
1213 log_link_debug(link, "Starting IPv6 Router Advertisements");
1214
fd3ef936
YW		 1215 r = radv_emit_dns(link);
1216 if (r < 0)
1217 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
1218
7465dd22
PF		 1219 r = sd_radv_start(link->radv);
1220 if (r < 0 && r != -EBUSY)
1221 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1222 }
1223
838d39af
SS		 1224 if (link_dhcp6_enabled(link) && IN_SET(link->network->dhcp6_without_ra,
1225 DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST,
1226 DHCP6_CLIENT_START_MODE_SOLICIT)) {
cd305af1
SS		 1227 assert(link->dhcp6_client);
1228 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1229
838d39af 1230 r = dhcp6_request_address(link, link->network->dhcp6_without_ra == DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST);
cd305af1 1231 if (r < 0 && r != -EBUSY)
1633c457 1232 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
cd305af1
SS		 1233 else
1234 log_link_debug(link, "Acquiring DHCPv6 lease");
1235 }
1236
1633c457
YW		 1237 r = dhcp6_request_prefix_delegation(link);
1238 if (r < 0)
1239 return log_link_warning_errno(link, r, "Failed to request DHCPv6 prefix delegation: %m");
10752343 1240
e7ab854c
TG		 1241 return 0;
1242}
1243
6fc25497 1244static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1245 int r;
1246
1247 assert(link);
ff254138
TG		 1248 assert(link->manager);
1249 assert(link->manager->event);
1250
910feb78 1251 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1252 assert(link->ipv4ll);
ff254138 1253
6a7a4e4d 1254 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1255
1256 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1257 if (r < 0)
1258 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1259 }
1260
78c958f8 1261 if (link_dhcp4_enabled(link)) {
eb34d4af 1262 assert(link->dhcp_client);
ff254138 1263
6a7a4e4d 1264 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1265
5c1d3fc9 1266 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1267 if (r < 0)
1268 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1269 }
ff254138 1270
6fc25497
SS		 1271 return 0;
1272}
1273
1274static int link_acquire_conf(Link *link) {
1275 int r;
1276
1277 assert(link);
1278
1279 r = link_acquire_ipv4_conf(link);
1280 if (r < 0)
1281 return r;
1282
3f7cc080 1283 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1284 r = link_acquire_ipv6_conf(link);
1285 if (r < 0)
1286 return r;
1287 }
1288
7272b25e
LP		 1289 if (link_lldp_emit_enabled(link)) {
1290 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1291 if (r < 0)
1292 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1293 }
1294
ff254138
TG		 1295 return 0;
1296}
1297
a61bb41c 1298bool link_has_carrier(Link *link) {
deb2e523
TG		 1299 /* see Documentation/networking/operstates.txt in the kernel sources */
1300
a61bb41c 1301 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1302 return true;
1303
a61bb41c 1304 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1305 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1306 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1307 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1308 return true;
1309
1310 return false;
1311}
1312
0e2fdb83
SS		 1313static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1314 int r;
1315
1316 assert(link);
1317
9524014e
DS		 1318 link->setting_genmode = false;
1319
0e2fdb83
SS		 1320 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1321 return 1;
1322
1323 r = sd_netlink_message_get_errno(m);
1324 if (r < 0)
5ecb131d 1325 log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring");
9524014e
DS		 1326 else
1327 log_link_debug(link, "Setting address genmode done.");
1328
1329 if (link->state == LINK_STATE_INITIALIZED) {
1330 r = link_configure_continue(link);
1331 if (r < 0)
1332 link_enter_failed(link);
1333 }
0e2fdb83
SS		 1334
1335 return 1;
1336}
1337
1338static int link_configure_addrgen_mode(Link *link) {
1339 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1340 uint8_t ipv6ll_mode;
1341 int r;
1342
1343 assert(link);
1344 assert(link->network);
1345 assert(link->manager);
1346 assert(link->manager->rtnl);
1347
9524014e 1348 if (!socket_ipv6_is_supported() || link->setting_genmode)
9f6e82e6
YW		 1349 return 0;
1350
0e2fdb83
SS		 1351 log_link_debug(link, "Setting address genmode for link");
1352
1353 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1354 if (r < 0)
1355 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1356
1357 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1358 if (r < 0)
1359 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1360
1361 r = sd_netlink_message_open_container(req, AF_INET6);
1362 if (r < 0)
1363 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1364
1365 if (!link_ipv6ll_enabled(link))
1366 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
6f6296b9 1367 else if (link->network->ipv6ll_address_gen_mode < 0) {
a6f1848a
SS		 1368 r = sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL);
1369 if (r < 0) {
1370 /* The file may not exist. And even if it exists, when stable_secret is unset,
1371 * reading the file fails with EIO. */
1372 log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret: %m");
1373
1374 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1375 } else
1376 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1377 } else
6f6296b9 1378 ipv6ll_mode = link->network->ipv6ll_address_gen_mode;
0e2fdb83
SS		 1379
1380 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1381 if (r < 0)
1382 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1383
1384 r = sd_netlink_message_close_container(req);
1385 if (r < 0)
1386 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1387
1388 r = sd_netlink_message_close_container(req);
1389 if (r < 0)
1390 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1391
1392 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1393 link_netlink_destroy_callback, link);
1394 if (r < 0)
1395 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1396
1397 link_ref(link);
9524014e 1398 link->setting_genmode = true;
0e2fdb83
SS		 1399
1400 return 0;
1401}
1402
302a796f 1403static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1404 int r;
1405
1746cf2a
TG		 1406 assert(link);
1407
5da8149f 1408 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1409 return 1;
1410
1c4baffc 1411 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1412 if (r < 0)
26d6b214 1413 /* we warn but don't fail the link, as it may be brought up later */
5ecb131d 1414 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
45ad2c13 1415
f882c247
TG		 1416 return 1;
1417}
1418
1cc84f3b 1419static int link_up(Link *link) {
4afd3348 1420 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1421 int r;
1422
f882c247 1423 assert(link);
c106cc36 1424 assert(link->network);
f882c247
TG		 1425 assert(link->manager);
1426 assert(link->manager->rtnl);
1427
6a7a4e4d 1428 log_link_debug(link, "Bringing link up");
449f7554 1429
6a7a4e4d
LP		 1430 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1431 if (r < 0)
1432 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1433
2b2d8603 1434 /* set it free if not enslaved with networkd */
6cb955c6 1435 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1436 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1437 if (r < 0)
1438 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1439 }
1440
5d4795f3 1441 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1442 if (r < 0)
1443 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1444
c106cc36 1445 if (link->network->mac) {
1c4baffc 1446 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1447 if (r < 0)
1448 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1449 }
1450
302a796f
YW		 1451 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1452 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1453 if (r < 0)
1454 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1455
b226d99b
TG		 1456 link_ref(link);
1457
f882c247
TG		 1458 return 0;
1459}
1460
302a796f 1461static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1462 int r;
1463
1464 assert(link);
1465
1466 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1467 return 1;
1468
1c4baffc 1469 r = sd_netlink_message_get_errno(m);
0d4ad91d 1470 if (r < 0)
5ecb131d 1471 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
0d4ad91d
AR		 1472
1473 return 1;
1474}
1475
8e54db83 1476int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1477 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1478 int r;
1479
1480 assert(link);
1481 assert(link->manager);
1482 assert(link->manager->rtnl);
1483
6a7a4e4d 1484 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1485
1486 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1487 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1488 if (r < 0)
1489 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1490
1491 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1492 if (r < 0)
1493 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1494
8e54db83
YW		 1495 r = netlink_call_async(link->manager->rtnl, NULL, req,
1496 callback ?: link_down_handler,
302a796f 1497 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1498 if (r < 0)
1499 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1500
1501 link_ref(link);
1502
1503 return 0;
1504}
1505
89fe6535
SS		 1506static int link_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1507 int r;
1508
1509 assert(link);
1510
1511 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1512 return 1;
1513
1514 r = sd_netlink_message_get_errno(m);
1515 if (r < 0)
1516 log_link_message_warning_errno(link, m, r, "Could not set group for the interface");
1517
1518 return 1;
1519}
1520
1521static int link_set_group(Link *link) {
1522 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1523 int r;
1524
1525 assert(link);
1526 assert(link->network);
1527 assert(link->manager);
1528 assert(link->manager->rtnl);
1529
1530 if (link->network->group <= 0)
1531 return 0;
1532
1533 log_link_debug(link, "Setting group");
1534
1535 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1536 if (r < 0)
1537 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1538
1539 r = sd_netlink_message_append_u32(req, IFLA_GROUP, link->network->group);
1540 if (r < 0)
1541 return log_link_error_errno(link, r, "Could not set link group: %m");
1542
1543 r = netlink_call_async(link->manager->rtnl, NULL, req, link_group_handler,
1544 link_netlink_destroy_callback, link);
1545 if (r < 0)
1546 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1547
1548 link_ref(link);
1549
1550 return 0;
1551}
1552
0d4ad91d
AR		 1553static int link_handle_bound_to_list(Link *link) {
1554 Link *l;
0d4ad91d
AR		 1555 int r;
1556 bool required_up = false;
1557 bool link_is_up = false;
1558
1559 assert(link);
1560
1561 if (hashmap_isempty(link->bound_to_links))
1562 return 0;
1563
1564 if (link->flags & IFF_UP)
1565 link_is_up = true;
1566
90e74a66 1567 HASHMAP_FOREACH (l, link->bound_to_links)
0d4ad91d
AR		 1568 if (link_has_carrier(l)) {
1569 required_up = true;
1570 break;
1571 }
1572
1573 if (!required_up && link_is_up) {
8e54db83 1574 r = link_down(link, NULL);
0d4ad91d
AR		 1575 if (r < 0)
1576 return r;
1577 } else if (required_up && !link_is_up) {
1578 r = link_up(link);
1579 if (r < 0)
1580 return r;
1581 }
1582
1583 return 0;
1584}
1585
1586static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 1587 Link *l;
1588 int r;
1589
1590 assert(link);
1591
1592 if (hashmap_isempty(link->bound_by_links))
1593 return 0;
1594
90e74a66 1595 HASHMAP_FOREACH (l, link->bound_by_links) {
0d4ad91d
AR		 1596 r = link_handle_bound_to_list(l);
1597 if (r < 0)
1598 return r;
1599 }
1600
1601 return 0;
1602}
1603
1604static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1605 int r;
1606
1607 assert(link);
1608 assert(carrier);
1609
1610 if (link == carrier)
1611 return 0;
1612
1613 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1614 return 0;
1615
1616 r = hashmap_ensure_allocated(h, NULL);
1617 if (r < 0)
1618 return r;
1619
1620 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1621 if (r < 0)
1622 return r;
1623
1624 return 0;
1625}
1626
1627static int link_new_bound_by_list(Link *link) {
1628 Manager *m;
1629 Link *carrier;
0d4ad91d
AR		 1630 int r;
1631 bool list_updated = false;
1632
1633 assert(link);
1634 assert(link->manager);
1635
1636 m = link->manager;
1637
90e74a66 1638 HASHMAP_FOREACH(carrier, m->links) {
0d4ad91d
AR		 1639 if (!carrier->network)
1640 continue;
1641
1642 if (strv_isempty(carrier->network->bind_carrier))
1643 continue;
1644
191a3f16 1645 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 1646 r = link_put_carrier(link, carrier, &link->bound_by_links);
1647 if (r < 0)
1648 return r;
1649
1650 list_updated = true;
1651 }
1652 }
1653
1654 if (list_updated)
84de38c5 1655 link_dirty(link);
0d4ad91d 1656
90e74a66 1657 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 1658 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1659 if (r < 0)
1660 return r;
1661
84de38c5 1662 link_dirty(carrier);
0d4ad91d
AR		 1663 }
1664
1665 return 0;
1666}
1667
1668static int link_new_bound_to_list(Link *link) {
1669 Manager *m;
1670 Link *carrier;
0d4ad91d
AR		 1671 int r;
1672 bool list_updated = false;
1673
1674 assert(link);
1675 assert(link->manager);
1676
1677 if (!link->network)
1678 return 0;
1679
1680 if (strv_isempty(link->network->bind_carrier))
1681 return 0;
1682
1683 m = link->manager;
1684
90e74a66 1685 HASHMAP_FOREACH (carrier, m->links) {
191a3f16 1686 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 1687 r = link_put_carrier(link, carrier, &link->bound_to_links);
1688 if (r < 0)
1689 return r;
1690
1691 list_updated = true;
1692 }
1693 }
1694
1695 if (list_updated)
84de38c5 1696 link_dirty(link);
0d4ad91d 1697
90e74a66 1698 HASHMAP_FOREACH (carrier, link->bound_to_links) {
0d4ad91d
AR		 1699 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1700 if (r < 0)
1701 return r;
1702
84de38c5 1703 link_dirty(carrier);
0d4ad91d
AR		 1704 }
1705
1706 return 0;
1707}
1708
1709static int link_new_carrier_maps(Link *link) {
1710 int r;
1711
1712 r = link_new_bound_by_list(link);
1713 if (r < 0)
1714 return r;
1715
1716 r = link_handle_bound_by_list(link);
1717 if (r < 0)
1718 return r;
1719
1720 r = link_new_bound_to_list(link);
1721 if (r < 0)
1722 return r;
1723
1724 r = link_handle_bound_to_list(link);
1725 if (r < 0)
1726 return r;
1727
1728 return 0;
1729}
1730
1731static void link_free_bound_to_list(Link *link) {
1732 Link *bound_to;
0d4ad91d 1733
90e74a66 1734 HASHMAP_FOREACH (bound_to, link->bound_to_links) {
0d4ad91d
AR		 1735 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
1736
1737 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 1738 link_dirty(bound_to);
0d4ad91d
AR		 1739 }
1740
1741 return;
1742}
1743
1744static void link_free_bound_by_list(Link *link) {
1745 Link *bound_by;
0d4ad91d 1746
90e74a66 1747 HASHMAP_FOREACH (bound_by, link->bound_by_links) {
0d4ad91d
AR		 1748 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
1749
1750 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 1751 link_dirty(bound_by);
0d4ad91d
AR		 1752 link_handle_bound_to_list(bound_by);
1753 }
1754 }
1755
1756 return;
1757}
1758
1759static void link_free_carrier_maps(Link *link) {
1760 bool list_updated = false;
1761
1762 assert(link);
1763
1764 if (!hashmap_isempty(link->bound_to_links)) {
1765 link_free_bound_to_list(link);
1766 list_updated = true;
1767 }
1768
1769 if (!hashmap_isempty(link->bound_by_links)) {
1770 link_free_bound_by_list(link);
1771 list_updated = true;
1772 }
1773
1774 if (list_updated)
84de38c5 1775 link_dirty(link);
0d4ad91d
AR		 1776
1777 return;
1778}
1779
5f707e12
YW		 1780static int link_append_to_master(Link *link, NetDev *netdev) {
1781 Link *master;
1782 int r;
1783
1784 assert(link);
1785 assert(netdev);
1786
1787 r = link_get(link->manager, netdev->ifindex, &master);
1788 if (r < 0)
1789 return r;
1790
de7fef4b 1791 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 1792 if (r <= 0)
5f707e12
YW		 1793 return r;
1794
1795 link_ref(link);
1796 return 0;
1797}
1798
1799static void link_drop_from_master(Link *link, NetDev *netdev) {
1800 Link *master;
1801
1802 assert(link);
1803
1804 if (!link->manager || !netdev)
1805 return;
1806
1807 if (link_get(link->manager, netdev->ifindex, &master) < 0)
1808 return;
1809
1810 link_unref(set_remove(master->slaves, link));
1811}
1812
1813static void link_detach_from_manager(Link *link) {
1814 if (!link || !link->manager)
1815 return;
1816
1817 link_unref(set_remove(link->manager->links_requesting_uuid, link));
1818 link_clean(link);
1819
1820 /* The following must be called at last. */
1821 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
1822 link_unref(link);
1823}
1824
0d4ad91d
AR		 1825void link_drop(Link *link) {
1826 if (!link || link->state == LINK_STATE_LINGER)
1827 return;
1828
1829 link_set_state(link, LINK_STATE_LINGER);
1830
1831 link_free_carrier_maps(link);
1832
5f707e12
YW		 1833 if (link->network) {
1834 link_drop_from_master(link, link->network->bridge);
1835 link_drop_from_master(link, link->network->bond);
1836 }
1837
6a7a4e4d 1838 log_link_debug(link, "Link removed");
0d4ad91d 1839
db2f8a2e 1840 (void) unlink(link->state_file);
c4397d94 1841 link_detach_from_manager(link);
0d4ad91d
AR		 1842}
1843
3f265037 1844static int link_joined(Link *link) {
f882c247
TG		 1845 int r;
1846
ef1ba606 1847 assert(link);
f5be5601 1848 assert(link->network);
dd3efc09 1849
0d4ad91d
AR		 1850 if (!hashmap_isempty(link->bound_to_links)) {
1851 r = link_handle_bound_to_list(link);
1852 if (r < 0)
1853 return r;
1854 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 1855 r = link_up(link);
1856 if (r < 0) {
1857 link_enter_failed(link);
1858 return r;
1859 }
ef1ba606 1860 }
f882c247 1861
9ed794a3 1862 if (link->network->bridge) {
e1853b00 1863 r = link_set_bridge(link);
6a7a4e4d
LP		 1864 if (r < 0)
1865 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 1866
1867 r = link_append_to_master(link, link->network->bridge);
1868 if (r < 0)
1869 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 1870 }
1871
eb64b435 1872 if (link->network->bond) {
7fcee284 1873 r = link_set_bond(link);
eb64b435
SS		 1874 if (r < 0)
1875 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 1876
45e11abf 1877 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 1878 if (r < 0)
1879 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 1880 }
1881
ffff9abe
TJ		 1882 if (link->network->use_br_vlan &&
1883 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 1884 r = link_set_bridge_vlan(link);
1885 if (r < 0)
1886 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
1887 }
1888
c1835a42
RM		 1889 /* Skip setting up addresses until it gets carrier,
1890 or it would try to set addresses twice,
1891 which is bad for non-idempotent steps. */
dad2d78e 1892 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 1893 return 0;
1894
b425c3ae 1895 link_set_state(link, LINK_STATE_CONFIGURING);
682c65b0 1896 return link_set_static_configs(link);
02b59d57
TG		 1897}
1898
302a796f 1899static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 1900 int r;
1901
1746cf2a 1902 assert(link);
ef1ba606 1903 assert(link->network);
34bf3c00 1904 assert(link->enslaving > 0);
02b59d57 1905
313cefa1 1906 link->enslaving--;
52433f6b 1907
5da8149f 1908 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 1909 return 1;
1910
1c4baffc 1911 r = sd_netlink_message_get_errno(m);
856f962c 1912 if (r < 0 && r != -EEXIST) {
5ecb131d 1913 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG		 1914 link_enter_failed(link);
1915 return 1;
4ff296b0
YW		 1916 }
1917
1918 log_link_debug(link, "Joined netdev");
02b59d57 1919
34bf3c00 1920 if (link->enslaving == 0) {
4ff296b0
YW		 1921 r = link_joined(link);
1922 if (r < 0)
1923 link_enter_failed(link);
34bf3c00 1924 }
02b59d57
TG		 1925
1926 return 1;
1927}
1928
3f265037 1929static int link_enter_join_netdev(Link *link) {
6a0a2f86 1930 NetDev *netdev;
02b59d57
TG		 1931 int r;
1932
1933 assert(link);
1934 assert(link->network);
bd08ce56 1935 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 1936
289e6774 1937 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 1938
84de38c5 1939 link_dirty(link);
34bf3c00 1940 link->enslaving = 0;
02b59d57 1941
d9c67ea1 1942 if (link->network->bond) {
cbff7170
TJ		 1943 if (link->network->bond->state == NETDEV_STATE_READY &&
1944 link->network->bond->ifindex == link->master_ifindex)
1945 return link_joined(link);
1946
f2341e0a
LP		 1947 log_struct(LOG_DEBUG,
1948 LOG_LINK_INTERFACE(link),
1949 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1950 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 1951
34bf3c00
YW		 1952 link->enslaving++;
1953
f2341e0a 1954 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 1955 if (r < 0) {
f2341e0a
LP		 1956 log_struct_errno(LOG_WARNING, r,
1957 LOG_LINK_INTERFACE(link),
1958 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1959 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 1960 link_enter_failed(link);
1961 return r;
1962 }
0ad6148e
MO		 1963 }
1964
d9c67ea1 1965 if (link->network->bridge) {
f2341e0a
LP		 1966 log_struct(LOG_DEBUG,
1967 LOG_LINK_INTERFACE(link),
1968 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1969 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 1970
34bf3c00
YW		 1971 link->enslaving++;
1972
f2341e0a 1973 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 1974 if (r < 0) {
f2341e0a
LP		 1975 log_struct_errno(LOG_WARNING, r,
1976 LOG_LINK_INTERFACE(link),
1977 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1978 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 1979 link_enter_failed(link);
1980 return r;
1981 }
52433f6b
TG		 1982 }
1983
6cb955c6
AR		 1984 if (link->network->vrf) {
1985 log_struct(LOG_DEBUG,
1986 LOG_LINK_INTERFACE(link),
1987 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 1988 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
1989
34bf3c00
YW		 1990 link->enslaving++;
1991
6cb955c6
AR		 1992 r = netdev_join(link->network->vrf, link, netdev_join_handler);
1993 if (r < 0) {
1994 log_struct_errno(LOG_WARNING, r,
1995 LOG_LINK_INTERFACE(link),
1996 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 1997 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 1998 link_enter_failed(link);
1999 return r;
2000 }
6cb955c6
AR		 2001 }
2002
90e74a66 2003 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7951dea2 2004
2b6db913
YW		 2005 if (netdev->ifindex > 0)
2006 /* Assume already enslaved. */
a63e5daa 2007 continue;
a63e5daa 2008
7033af49
YW		 2009 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2010 continue;
2011
f2341e0a
LP		 2012 log_struct(LOG_DEBUG,
2013 LOG_LINK_INTERFACE(link),
2014 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2015 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2016
34bf3c00
YW		 2017 link->enslaving++;
2018
f2341e0a 2019 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2020 if (r < 0) {
f2341e0a
LP		 2021 log_struct_errno(LOG_WARNING, r,
2022 LOG_LINK_INTERFACE(link),
2023 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2024 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2025 link_enter_failed(link);
2026 return r;
2027 }
326cb406
SS		 2028 }
2029
34bf3c00
YW		 2030 if (link->enslaving == 0)
2031 return link_joined(link);
2032
ef1ba606
TG		 2033 return 0;
2034}
2035
769d324c 2036static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2037 int r;
2038
765afd5c 2039 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2040 return 0;
2041
765afd5c
LP		 2042 /* We propagate the forwarding flag from one interface to the
2043 * global setting one way. This means: as long as at least one
2044 * interface was configured at any time that had IP forwarding
2045 * enabled the setting will stay on for good. We do this
2046 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2047 * somewhat in sync (see below). */
15dee3f0 2048
62e021a9 2049 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2050 if (r < 0)
765afd5c 2051 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2052
769d324c
LP		 2053 return 0;
2054}
2055
2056static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2057 int r;
2058
765afd5c 2059 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2060 return 0;
2061
61233823 2062 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2063 * packet forwarding setting: either packet forwarding is on
2064 * for all, or off for all. We hence don't bother with a
2065 * per-interface setting, but simply propagate the interface
2066 * flag, if it is set, to the global flag, one-way. Note that
2067 * while IPv4 would allow a per-interface flag, we expose the
2068 * same behaviour there and also propagate the setting from
2069 * one to all, to keep things simple (see above). */
15dee3f0 2070
62e021a9 2071 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2072 if (r < 0)
765afd5c 2073 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2074
2075 return 0;
2076}
2077
49092e22 2078static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2079 IPv6PrivacyExtensions s;
49092e22
SS		 2080 int r;
2081
1f0d9695 2082 s = link_ipv6_privacy_extensions(link);
66a6bd68 2083 if (s < 0)
49092e22
SS		 2084 return 0;
2085
62e021a9 2086 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2087 if (r < 0)
49092e22
SS		 2088 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2089
2090 return 0;
2091}
2092
4f2e437a 2093static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2094 int r;
2095
2096 /* Make this a NOP if IPv6 is not available */
2097 if (!socket_ipv6_is_supported())
2098 return 0;
2099
2100 if (link->flags & IFF_LOOPBACK)
2101 return 0;
2102
d68e2e59
LP		 2103 if (!link->network)
2104 return 0;
2105
62e021a9 2106 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2107 if (r < 0)
fe307276 2108 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2109
2110 return 0;
2111}
2112
8749cbcd 2113static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2114 int r;
2115
2116 /* Make this a NOP if IPv6 is not available */
2117 if (!socket_ipv6_is_supported())
2118 return 0;
2119
2120 if (link->flags & IFF_LOOPBACK)
2121 return 0;
2122
d68e2e59
LP		 2123 if (!link->network)
2124 return 0;
2125
8749cbcd
SS		 2126 if (link->network->ipv6_dad_transmits < 0)
2127 return 0;
2128
62e021a9 2129 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2130 if (r < 0)
8749cbcd 2131 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2132
2133 return 0;
2134}
2135
b69c3180 2136static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2137 int r;
2138
2139 /* Make this a NOP if IPv6 is not available */
2140 if (!socket_ipv6_is_supported())
2141 return 0;
2142
2143 if (link->flags & IFF_LOOPBACK)
2144 return 0;
2145
d68e2e59
LP		 2146 if (!link->network)
2147 return 0;
2148
b69c3180
SS		 2149 if (link->network->ipv6_hop_limit < 0)
2150 return 0;
2151
62e021a9 2152 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2153 if (r < 0)
b69c3180 2154 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2155
2156 return 0;
2157}
2158
11102cba 2159static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2160 int r;
2161
2162 /* Make this a NOP if IPv6 is not available */
2163 if (!socket_ipv6_is_supported())
2164 return 0;
2165
2166 if (link->flags & IFF_LOOPBACK)
2167 return 0;
2168
2169 if (link->network->ipv6_mtu == 0)
2170 return 0;
2171
d236718c
DS		 2172 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
2173 * on the interface. Bump up IPv6 MTU bytes to IPV6_MTU_MIN. */
2174 if (link->network->ipv6_mtu < IPV6_MIN_MTU) {
2175 log_link_notice(link, "Bumping IPv6 MTU to "STRINGIFY(IPV6_MIN_MTU)" byte minimum required");
2176 link->network->ipv6_mtu = IPV6_MIN_MTU;
2177 }
2178
62e021a9 2179 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
d236718c
DS		 2180 if (r < 0) {
2181 if (link->mtu < link->network->ipv6_mtu)
2182 log_link_warning(link, "Cannot set IPv6 MTU %"PRIu32" higher than device MTU %"PRIu32,
2183 link->network->ipv6_mtu, link->mtu);
2184 else
2185 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2186 }
2187
2188 link->ipv6_mtu_set = true;
11102cba
SS		 2189
2190 return 0;
2191}
2192
94d76d07
YW		 2193static int link_set_ipv4_accept_local(Link *link) {
2194 int r;
2195
2196 if (link->flags & IFF_LOOPBACK)
2197 return 0;
2198
2199 if (link->network->ipv4_accept_local < 0)
2200 return 0;
2201
2202 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "accept_local", link->network->ipv4_accept_local);
2203 if (r < 0)
2204 log_link_warning_errno(link, r, "Cannot set IPv4 accept_local flag for interface: %m");
2205
2206 return 0;
2207}
2208
0917a271
DS		 2209static int link_enumerate_ipv6_tentative_addresses(Link *link) {
2210 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
2211 sd_netlink_message *addr;
2212 int r;
2213
2214 assert(link);
2215 assert(link->manager);
2216 assert(link->manager->rtnl);
2217
2218 r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_GETADDR, 0, AF_INET6);
2219 if (r < 0)
2220 return r;
2221
2222 r = sd_netlink_call(link->manager->rtnl, req, 0, &reply);
2223 if (r < 0)
2224 return r;
2225
2226 for (addr = reply; addr; addr = sd_netlink_message_next(addr)) {
2227 unsigned char flags;
2228 int ifindex;
2229
2230 r = sd_rtnl_message_addr_get_ifindex(addr, &ifindex);
2231 if (r < 0) {
2232 log_link_warning_errno(link, r, "rtnl: invalid ifindex, ignoring: %m");
2233 continue;
2234 } else if (link->ifindex != ifindex)
2235 continue;
2236
2237 r = sd_rtnl_message_addr_get_flags(addr, &flags);
2238 if (r < 0) {
2239 log_link_warning_errno(link, r, "rtnl: received address message with invalid flags, ignoring: %m");
2240 continue;
2241 } else if (!(flags & IFA_F_TENTATIVE))
2242 continue;
2243
2244 log_link_debug(link, "Found tentative ipv6 link-local address");
2245 (void) manager_rtnl_process_address(link->manager->rtnl, addr, link->manager);
2246 }
2247
2248 return 0;
2249}
2250
5e5b137a 2251static int link_drop_foreign_config(Link *link) {
5e5b137a
TG		 2252 int r;
2253
0917a271
DS		 2254 /* The kernel doesn't notify us about tentative addresses;
2255 * so if ipv6ll is disabled, we need to enumerate them now so we can drop them below */
2256 if (!link_ipv6ll_enabled(link)) {
2257 r = link_enumerate_ipv6_tentative_addresses(link);
2258 if (r < 0)
2259 return r;
2260 }
2261
f8f2f880
YW		 2262 r = link_drop_foreign_addresses(link);
2263 if (r < 0)
2264 return r;
5e5b137a 2265
59048336
YW		 2266 r = link_drop_foreign_neighbors(link);
2267 if (r < 0)
2268 return r;
d1bdafd2 2269
779804dd 2270 return link_drop_foreign_routes(link);
5e5b137a
TG		 2271}
2272
3104883d 2273static int link_drop_config(Link *link) {
3104883d
SS		 2274 int r;
2275
d7fbb9f5
YW		 2276 r = link_drop_addresses(link);
2277 if (r < 0)
2278 return r;
3104883d 2279
59048336
YW		 2280 r = link_drop_neighbors(link);
2281 if (r < 0)
2282 return r;
d1bdafd2 2283
62f0ea5f
YW		 2284 r = link_drop_routes(link);
2285 if (r < 0)
2286 return r;
3104883d 2287
c69305ff
LP		 2288 ndisc_flush(link);
2289
3104883d
SS		 2290 return 0;
2291}
2292
34658df2
YW		 2293static int link_configure_traffic_control(Link *link) {
2294 TrafficControl *tc;
02b59d57
TG		 2295 int r;
2296
34658df2
YW		 2297 link->tc_configured = false;
2298 link->tc_messages = 0;
4ecdcb07 2299
90e74a66 2300 ORDERED_HASHMAP_FOREACH(tc, link->network->tc_by_section) {
34658df2 2301 r = traffic_control_configure(link, tc);
4ecdcb07
YW		 2302 if (r < 0)
2303 return r;
2304 }
2305
34658df2
YW		 2306 if (link->tc_messages == 0)
2307 link->tc_configured = true;
4ecdcb07 2308 else
34658df2 2309 log_link_debug(link, "Configuring traffic control");
4ecdcb07
YW		 2310
2311 return 0;
2312}
2313
518cd6b5
SS		 2314static int link_configure_sr_iov(Link *link) {
2315 SRIOV *sr_iov;
518cd6b5
SS		 2316 int r;
2317
2318 link->sr_iov_configured = false;
2319 link->sr_iov_messages = 0;
2320
90e74a66 2321 ORDERED_HASHMAP_FOREACH(sr_iov, link->network->sr_iov_by_section) {
518cd6b5
SS		 2322 r = sr_iov_configure(link, sr_iov);
2323 if (r < 0)
2324 return r;
2325 }
2326
2327 if (link->sr_iov_messages == 0)
2328 link->sr_iov_configured = true;
2329 else
2330 log_link_debug(link, "Configuring SR-IOV");
2331
2332 return 0;
2333}
2334
4ecdcb07
YW		 2335static int link_configure(Link *link) {
2336 int r;
2337
ef1ba606 2338 assert(link);
b22d8a00 2339 assert(link->network);
bd08ce56 2340 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2341
34658df2 2342 r = link_configure_traffic_control(link);
4ecdcb07
YW		 2343 if (r < 0)
2344 return r;
2345
518cd6b5
SS		 2346 r = link_configure_sr_iov(link);
2347 if (r < 0)
2348 return r;
2349
500b96eb 2350 if (link->iftype == ARPHRD_CAN)
93ea7750 2351 return link_configure_can(link);
92c918b0 2352
482efedc
SS		 2353 /* If IPv6 configured that is static IPv6 address and IPv6LL autoconfiguration is enabled
2354 * for this interface, then enable IPv6 */
57ad7607 2355 (void) link_update_ipv6_sysctl(link);
482efedc 2356
23d8b221
SS		 2357 r = link_set_proxy_arp(link);
2358 if (r < 0)
2359 return r;
2360
c16b5821 2361 r = link_set_ipv6_proxy_ndp_addresses(link);
a0e5c15d
FK		 2362 if (r < 0)
2363 return r;
2364
769d324c
LP		 2365 r = link_set_ipv4_forward(link);
2366 if (r < 0)
2367 return r;
2368
2369 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2370 if (r < 0)
2371 return r;
2372
49092e22
SS		 2373 r = link_set_ipv6_privacy_extensions(link);
2374 if (r < 0)
2375 return r;
2376
4f2e437a
SS		 2377 r = link_set_ipv6_accept_ra(link);
2378 if (r < 0)
2379 return r;
2380
8749cbcd
SS		 2381 r = link_set_ipv6_dad_transmits(link);
2382 if (r < 0)
2383 return r;
b69c3180
SS		 2384
2385 r = link_set_ipv6_hop_limit(link);
2386 if (r < 0)
2387 return r;
8749cbcd 2388
94d76d07
YW		 2389 r = link_set_ipv4_accept_local(link);
2390 if (r < 0)
2391 return r;
2392
99d2baa2
SS		 2393 r = link_set_flags(link);
2394 if (r < 0)
2395 return r;
2396
89fe6535
SS		 2397 r = link_set_group(link);
2398 if (r < 0)
2399 return r;
2400
910feb78 2401 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
b22d8a00 2402 r = ipv4ll_configure(link);
eb34d4af
TG		 2403 if (r < 0)
2404 return r;
2405 }
2406
78c958f8 2407 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2408 r = dhcp4_set_promote_secondaries(link);
2409 if (r < 0)
2410 return r;
2411
3c9b8860 2412 r = dhcp4_configure(link);
eb34d4af
TG		 2413 if (r < 0)
2414 return r;
eb34d4af
TG		 2415 }
2416
78c958f8 2417 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2418 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2419 if (r < 0)
2420 return r;
2421
2422 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2423 if (r < 0)
2424 return r;
dd43110f
TG		 2425 }
2426
62379e88
TG		 2427 if (link_dhcp6_enabled(link) ||
2428 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2429 r = dhcp6_configure(link);
2430 if (r < 0)
2431 return r;
2432 }
2433
2434 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2435 r = ndisc_configure(link);
4138fb2c
PF		 2436 if (r < 0)
2437 return r;
2438 }
2439
7465dd22
PF		 2440 if (link_radv_enabled(link)) {
2441 r = radv_configure(link);
2442 if (r < 0)
2443 return r;
2444 }
2445
8e1ad1ea 2446 if (link_lldp_rx_enabled(link)) {
7f853950 2447 r = link_lldp_rx_configure(link);
273eec24
LP		 2448 if (r < 0)
2449 return r;
ce43e484
SS		 2450 }
2451
f6fcc1c2 2452 r = link_configure_mtu(link);
40288ece
YW		 2453 if (r < 0)
2454 return r;
44b598a1 2455
9f6e82e6
YW		 2456 r = link_configure_addrgen_mode(link);
2457 if (r < 0)
2458 return r;
0e2fdb83 2459
051e77ca
SS		 2460 r = link_configure_ipv4_dad(link);
2461 if (r < 0)
2462 return r;
2463
3a390124
DS		 2464 return link_configure_continue(link);
2465}
2466
2467/* The configuration continues in this separate function, instead of
2468 * including this in the above link_configure() function, for two
2469 * reasons:
2470 * 1) some devices reset the link when the mtu is set, which caused
2471 * an infinite loop here in networkd; see:
2472 * https://github.com/systemd/systemd/issues/6593
2473 * https://github.com/systemd/systemd/issues/9831
2474 * 2) if ipv6ll is disabled, then bringing the interface up must be
2475 * delayed until after we get confirmation from the kernel that
2476 * the addr_gen_mode parameter has been set (via netlink), see:
2477 * https://github.com/systemd/systemd/issues/13882
2478 */
2479static int link_configure_continue(Link *link) {
55dc8c4a
YW		 2480 int r;
2481
2482 assert(link);
2483 assert(link->network);
bd08ce56 2484 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a 2485
9524014e 2486 if (link->setting_mtu || link->setting_genmode)
55dc8c4a
YW		 2487 return 0;
2488
4c649652
DS		 2489 /* Drop foreign config, but ignore loopback or critical devices.
2490 * We do not want to remove loopback address or addresses used for root NFS. */
2491 if (!(link->flags & IFF_LOOPBACK) &&
2492 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
2493 r = link_drop_foreign_config(link);
2494 if (r < 0)
2495 return r;
2496 }
2497
d236718c
DS		 2498 /* The kernel resets ipv6 mtu after changing device mtu;
2499 * we must set this here, after we've set device mtu */
2500 r = link_set_ipv6_mtu(link);
2501 if (r < 0)
2502 return r;
2503
dad2d78e 2504 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2505 r = link_acquire_conf(link);
2506 if (r < 0)
2507 return r;
cc544d5f 2508 }
1e9be60b 2509
3f265037 2510 return link_enter_join_netdev(link);
505f8da7
TG		 2511}
2512
27dfc982
YW		 2513static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2514 assert(duid);
2515
2516 if (duid->raw_data_len > 0)
2517 return 0;
2518
2519 if (duid->type != DUID_TYPE_UUID)
2520 return -EINVAL;
2521
2522 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2523 duid->raw_data_len = sizeof(sd_id128_t);
2524
2525 return 1;
2526}
2527
2528int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2529 Manager *manager = userdata;
2530 const sd_bus_error *e;
2531 const void *a;
2532 size_t sz;
2533 DUID *duid;
2534 Link *link;
2535 int r;
2536
2537 assert(m);
2538 assert(manager);
2539
2540 e = sd_bus_message_get_error(m);
2541 if (e) {
2542 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 2543 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 2544 e->message);
2545 goto configure;
2546 }
2547
2548 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2549 if (r < 0)
2550 goto configure;
2551
2552 if (sz != sizeof(sd_id128_t)) {
ab4dd984 2553 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 2554 goto configure;
2555 }
2556
2557 memcpy(&manager->product_uuid, a, sz);
2558 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2559 (void) duid_set_uuid(duid, manager->product_uuid);
2560
2561 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2562
2563configure:
2564 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3dc2e7af
YW		 2565 link_unref(link);
2566
27dfc982
YW		 2567 r = link_configure(link);
2568 if (r < 0)
4ff296b0 2569 link_enter_failed(link);
27dfc982
YW		 2570 }
2571
2572 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
2573
2574 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2575 * even if the method fails. */
2576 manager->has_product_uuid = true;
2577
2578 return 1;
2579}
2580
2581static bool link_requires_uuid(Link *link) {
2582 const DUID *duid;
2583
2584 assert(link);
2585 assert(link->manager);
2586 assert(link->network);
2587
2588 duid = link_get_duid(link);
2589 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
2590 return false;
2591
2592 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
2593 return true;
2594
2595 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
2596 return true;
2597
2598 return false;
2599}
2600
2601static int link_configure_duid(Link *link) {
2602 Manager *m;
2603 DUID *duid;
2604 int r;
2605
2606 assert(link);
2607 assert(link->manager);
2608 assert(link->network);
2609
2610 m = link->manager;
2611 duid = link_get_duid(link);
2612
2613 if (!link_requires_uuid(link))
2614 return 1;
2615
2616 if (m->has_product_uuid) {
2617 (void) duid_set_uuid(duid, m->product_uuid);
2618 return 1;
2619 }
2620
2621 if (!m->links_requesting_uuid) {
2622 r = manager_request_product_uuid(m, link);
2623 if (r < 0) {
2624 if (r == -ENOMEM)
2625 return r;
2626
ab4dd984
ZJS		 2627 log_link_warning_errno(link, r,
2628 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 2629 return 1;
2630 }
2631 } else {
2632 r = set_put(m->links_requesting_uuid, link);
2633 if (r < 0)
2634 return log_oom();
39dbd0c7
ZJS		 2635 if (r > 0)
2636 link_ref(link);
27dfc982
YW		 2637
2638 r = set_put(m->duids_requesting_uuid, duid);
2639 if (r < 0)
2640 return log_oom();
2641 }
2642
2643 return 0;
2644}
2645
572b21d9 2646static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
ad932b15
YW		 2647 Network *network;
2648 int r;
2649
572b21d9
YW		 2650 if (m) {
2651 _cleanup_strv_free_ char **s = NULL;
2652
2653 r = sd_netlink_message_get_errno(m);
2654 if (r < 0)
2655 return r;
2656
2657 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2658 if (r < 0 && r != -ENODATA)
2659 return r;
2660
2661 strv_free_and_replace(link->alternative_names, s);
2662 }
2663
c643bda5
YW		 2664 r = network_get(link->manager, link->iftype, link->sd_device,
2665 link->ifname, link->alternative_names, link->driver,
2666 &link->mac, &link->permanent_mac,
2667 link->wlan_iftype, link->ssid, &link->bssid, &network);
ad932b15
YW		 2668 if (r == -ENOENT) {
2669 link_enter_unmanaged(link);
2670 return 0;
2671 } else if (r == 0 && network->unmanaged) {
2672 link_enter_unmanaged(link);
2673 return 0;
2674 } else if (r < 0)
2675 return r;
2676
99b8517c 2677 if (link->network == network && !force)
ad932b15
YW		 2678 return 0;
2679
2680 log_link_info(link, "Re-configuring with %s", network->filename);
2681
2682 /* Dropping old .network file */
2683 r = link_stop_clients(link, false);
572b21d9 2684 if (r < 0)
ad932b15 2685 return r;
ad932b15
YW		 2686
2687 if (link_dhcp4_server_enabled(link))
2688 (void) sd_dhcp_server_stop(link->dhcp_server);
2689
2690 r = link_drop_config(link);
2691 if (r < 0)
2692 return r;
2693
2c7b826d 2694 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
ad932b15
YW		 2695 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
2696 r = link_drop_foreign_config(link);
2697 if (r < 0)
2698 return r;
2699 }
2700
2701 link_free_carrier_maps(link);
2702 link_free_engines(link);
2703 link->network = network_unref(link->network);
2704
2705 /* Then, apply new .network file */
2706 r = network_apply(network, link);
2707 if (r < 0)
2708 return r;
2709
2710 r = link_new_carrier_maps(link);
2711 if (r < 0)
2712 return r;
2713
2714 link_set_state(link, LINK_STATE_INITIALIZED);
8ae7b8a1 2715 link_dirty(link);
ad932b15
YW		 2716
2717 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2718 * link_configure() is called later asynchronously. */
2719 r = link_configure_duid(link);
2720 if (r <= 0)
2721 return r;
2722
2723 r = link_configure(link);
2724 if (r < 0)
2725 return r;
2726
2727 return 0;
2728}
2729
572b21d9
YW		 2730static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2731 int r;
2732
2733 r = link_reconfigure_internal(link, m, false);
2734 if (r < 0)
2735 link_enter_failed(link);
2736
2737 return 1;
2738}
2739
2740static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2741 int r;
2742
2743 r = link_reconfigure_internal(link, m, true);
2744 if (r < 0)
2745 link_enter_failed(link);
2746
2747 return 1;
2748}
2749
2750int link_reconfigure(Link *link, bool force) {
2751 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2752 int r;
2753
2c0d7ed3
YW		 2754 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
2755 return 0;
2756
572b21d9
YW		 2757 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2758 link->ifindex);
2759 if (r < 0)
2760 return r;
2761
2762 r = netlink_call_async(link->manager->rtnl, NULL, req,
2763 force ? link_force_reconfigure_handler : link_reconfigure_handler,
2764 link_netlink_destroy_callback, link);
2765 if (r < 0)
2766 return r;
2767
2768 link_ref(link);
2769
2770 return 0;
2771}
2772
e6bf7774 2773static int link_initialized_and_synced(Link *link) {
505f8da7 2774 Network *network;
505f8da7
TG		 2775 int r;
2776
2777 assert(link);
2778 assert(link->ifname);
2779 assert(link->manager);
2780
bd08ce56
YW		 2781 /* We may get called either from the asynchronous netlink callback,
2782 * or directly for link_add() if running in a container. See link_add(). */
2783 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2784 return 0;
505f8da7 2785
6a7a4e4d 2786 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2787 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2788
0d4ad91d
AR		 2789 r = link_new_bound_by_list(link);
2790 if (r < 0)
2791 return r;
2792
2793 r = link_handle_bound_by_list(link);
2794 if (r < 0)
2795 return r;
2796
c4a03a56 2797 if (!link->network) {
0894cfe4 2798 r = wifi_get_info(link);
8d968fdd
YW		 2799 if (r < 0)
2800 return r;
2801
c643bda5
YW		 2802 r = network_get(link->manager, link->iftype, link->sd_device,
2803 link->ifname, link->alternative_names, link->driver,
2804 &link->mac, &link->permanent_mac,
2805 link->wlan_iftype, link->ssid, &link->bssid, &network);
c4a03a56
TG		 2806 if (r == -ENOENT) {
2807 link_enter_unmanaged(link);
4232cf04 2808 return 0;
a09dc546
DM		 2809 } else if (r == 0 && network->unmanaged) {
2810 link_enter_unmanaged(link);
2811 return 0;
c4a03a56
TG		 2812 } else if (r < 0)
2813 return r;
505f8da7 2814
c4a03a56
TG		 2815 if (link->flags & IFF_LOOPBACK) {
2816 if (network->link_local != ADDRESS_FAMILY_NO)
2817 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2818
c4a03a56
TG		 2819 if (network->dhcp != ADDRESS_FAMILY_NO)
2820 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2821
c4a03a56
TG		 2822 if (network->dhcp_server)
2823 log_link_debug(link, "Ignoring DHCP server for loopback link");
2824 }
bd2efe92 2825
7d342c03 2826 r = network_apply(network, link);
c4a03a56
TG		 2827 if (r < 0)
2828 return r;
2829 }
505f8da7 2830
0d4ad91d
AR		 2831 r = link_new_bound_to_list(link);
2832 if (r < 0)
2833 return r;
2834
27dfc982
YW		 2835 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2836 * link_configure() is called later asynchronously. */
2837 r = link_configure_duid(link);
2838 if (r <= 0)
2839 return r;
2840
a748b692
TG		 2841 r = link_configure(link);
2842 if (r < 0)
2843 return r;
2844
4232cf04 2845 return 0;
505f8da7
TG		 2846}
2847
302a796f 2848static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
572b21d9 2849 _cleanup_strv_free_ char **s = NULL;
4ff296b0
YW		 2850 int r;
2851
572b21d9
YW		 2852 r = sd_netlink_message_get_errno(m);
2853 if (r < 0) {
40681e5c 2854 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 2855 link_enter_failed(link);
2856 return 0;
2857 }
2858
2859 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2860 if (r < 0 && r != -ENODATA) {
2861 link_enter_failed(link);
2862 return 0;
2863 }
2864
2865 strv_free_and_replace(link->alternative_names, s);
2866
4ff296b0
YW		 2867 r = link_initialized_and_synced(link);
2868 if (r < 0)
2869 link_enter_failed(link);
e6bf7774
YW		 2870 return 1;
2871}
2872
51517f9e 2873int link_initialized(Link *link, sd_device *device) {
4afd3348 2874 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2875 int r;
2876
2877 assert(link);
2878 assert(link->manager);
2879 assert(link->manager->rtnl);
2880 assert(device);
2881
8434fd5c 2882 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2883 return 0;
2884
51517f9e 2885 if (link->sd_device)
679b3605
TG		 2886 return 0;
2887
79008bdd 2888 log_link_debug(link, "udev initialized link");
bd08ce56 2889 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 2890
51517f9e 2891 link->sd_device = sd_device_ref(device);
4f561e8e 2892
3c9b8860
TG		 2893 /* udev has initialized the link, but we don't know if we have yet
2894 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2895 * when it returns we know that the pending NEWLINKs have already been
2896 * processed and that we are up-to-date */
4f561e8e 2897
3c9b8860
TG		 2898 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2899 link->ifindex);
4f561e8e
TG		 2900 if (r < 0)
2901 return r;
2902
302a796f
YW		 2903 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
2904 link_netlink_destroy_callback, link);
4f561e8e
TG		 2905 if (r < 0)
2906 return r;
2907
5da8149f
TG		 2908 link_ref(link);
2909
4f561e8e
TG		 2910 return 0;
2911}
2912
c4a03a56 2913static int link_load(Link *link) {
0bc70f1d
TG		 2914 _cleanup_free_ char *network_file = NULL,
2915 *addresses = NULL,
f703cc2c 2916 *routes = NULL,
0bc70f1d
TG		 2917 *dhcp4_address = NULL,
2918 *ipv4ll_address = NULL;
2919 union in_addr_union address;
c4a03a56
TG		 2920 int r;
2921
2922 assert(link);
2923
aa8fbc74 2924 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 2925 "NETWORK_FILE", &network_file,
2926 "ADDRESSES", &addresses,
f703cc2c 2927 "ROUTES", &routes,
0bc70f1d 2928 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 2929 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 2930 if (r < 0 && r != -ENOENT)
2931 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
2932
2933 if (network_file) {
2934 Network *network;
2935 char *suffix;
2936
2937 /* drop suffix */
2938 suffix = strrchr(network_file, '.');
2939 if (!suffix) {
2940 log_link_debug(link, "Failed to get network name from %s", network_file);
2941 goto network_file_fail;
2942 }
2943 *suffix = '\0';
2944
2945 r = network_get_by_name(link->manager, basename(network_file), &network);
2946 if (r < 0) {
2947 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
2948 goto network_file_fail;
2949 }
2950
7d342c03 2951 r = network_apply(network, link);
c4a03a56
TG		 2952 if (r < 0)
2953 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
2954 }
2955
2956network_file_fail:
2957
da4d3a61
YW		 2958 r = link_deserialize_addresses(link, addresses);
2959 if (r < 0)
2960 log_link_warning_errno(link, r, "Failed to load addresses from %s, ignoring: %m", link->state_file);
74544b4e 2961
731ff05b
YW		 2962 r = link_deserialize_routes(link, routes);
2963 if (r < 0)
2964 log_link_warning_errno(link, r, "Failed to load routes from %s, ignoring: %m", link->state_file);
f703cc2c 2965
0bc70f1d
TG		 2966 if (dhcp4_address) {
2967 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
2968 if (r < 0) {
b68d26b8 2969 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 2970 goto dhcp4_address_fail;
2971 }
2972
b1c626f6 2973 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 2974 if (r < 0)
b68d26b8 2975 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d 2976
1b43e246
DS		 2977 r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0);
2978 if (r < 0)
2979 return log_link_error_errno(link, r, "Failed to attach DHCPv4 event: %m");
2980
0bc70f1d
TG		 2981 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
2982 if (r < 0)
b68d26b8 2983 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 2984 }
2985
2986dhcp4_address_fail:
2987
2988 if (ipv4ll_address) {
2989 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
2990 if (r < 0) {
b68d26b8 2991 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 2992 goto ipv4ll_address_fail;
2993 }
2994
2995 r = sd_ipv4ll_new(&link->ipv4ll);
2996 if (r < 0)
b68d26b8 2997 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d 2998
1b43e246
DS		 2999 r = sd_ipv4ll_attach_event(link->ipv4ll, NULL, 0);
3000 if (r < 0)
3001 return log_link_error_errno(link, r, "Failed to attach IPv4LL event: %m");
3002
0bc70f1d
TG		 3003 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3004 if (r < 0)
b68d26b8 3005 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3006 }
3007
3008ipv4ll_address_fail:
3009
c4a03a56
TG		 3010 return 0;
3011}
3012
1c4baffc 3013int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3014 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3015 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3016 Link *link;
5a937ea2 3017 int r;
505f8da7
TG		 3018
3019 assert(m);
fbbeb65a 3020 assert(m->rtnl);
505f8da7
TG		 3021 assert(message);
3022 assert(ret);
3023
3024 r = link_new(m, message, ret);
3025 if (r < 0)
3026 return r;
3027
3028 link = *ret;
3029
6a7a4e4d 3030 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3031
c4a03a56
TG		 3032 r = link_load(link);
3033 if (r < 0)
3034 return r;
3035
bf331d87
YW		 3036 if (path_is_read_only_fs("/sys") <= 0) {
3037 /* udev should be around */
ae06ab10 3038 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3039 r = sd_device_new_from_device_id(&device, ifindex_str);
3040 if (r < 0) {
4d59e14f
YW		 3041 log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m");
3042 return 0;
5c416fc4 3043 }
505f8da7 3044
5a937ea2 3045 r = sd_device_get_is_initialized(device);
51517f9e 3046 if (r < 0) {
bf331d87 3047 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 3048 goto failed;
3049 }
5a937ea2 3050 if (r == 0) {
505f8da7 3051 /* not yet ready */
79008bdd 3052 log_link_debug(link, "link pending udev initialization...");
505f8da7 3053 return 0;
3c4cb064 3054 }
505f8da7 3055
299ad32d
YW		 3056 r = device_is_renaming(device);
3057 if (r < 0) {
bf331d87 3058 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 3059 goto failed;
3060 }
3061 if (r > 0) {
bf331d87 3062 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 3063 return 0;
3064 }
3065
4f561e8e
TG		 3066 r = link_initialized(link, device);
3067 if (r < 0)
5c416fc4 3068 goto failed;
4f561e8e 3069 } else {
e6bf7774 3070 r = link_initialized_and_synced(link);
4f561e8e 3071 if (r < 0)
5c416fc4 3072 goto failed;
4f561e8e 3073 }
505f8da7 3074
a748b692 3075 return 0;
5c416fc4
TG		 3076failed:
3077 link_enter_failed(link);
3078 return r;
a748b692
TG		 3079}
3080
c601ebf7 3081int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3082 int r;
3083
3084 assert(link);
3085
3086 log_link_info(link, "Gained IPv6LL");
3087
c601ebf7 3088 link->ipv6ll_address = *address;
e7ab854c
TG		 3089 link_check_ready(link);
3090
b9ea3d2e 3091 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3092 r = link_acquire_ipv6_conf(link);
3093 if (r < 0) {
3094 link_enter_failed(link);
3095 return r;
3096 }
3097 }
3098
3099 return 0;
3100}
3101
9c0a72f9
TG		 3102static int link_carrier_gained(Link *link) {
3103 int r;
3104
3105 assert(link);
3106
0894cfe4 3107 r = wifi_get_info(link);
8d968fdd
YW		 3108 if (r < 0)
3109 return r;
3110 if (r > 0) {
572b21d9
YW		 3111 r = link_reconfigure_internal(link, NULL, false);
3112 if (r < 0) {
3113 link_enter_failed(link);
8d968fdd 3114 return r;
572b21d9 3115 }
8d968fdd
YW		 3116 }
3117
b9ea3d2e 3118 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3119 r = link_acquire_conf(link);
3120 if (r < 0) {
3121 link_enter_failed(link);
3122 return r;
3123 }
6fc25497 3124
b425c3ae 3125 link_set_state(link, LINK_STATE_CONFIGURING);
682c65b0 3126 r = link_set_static_configs(link);
6fc25497
SS		 3127 if (r < 0)
3128 return r;
9c0a72f9
TG		 3129 }
3130
0d4ad91d
AR		 3131 r = link_handle_bound_by_list(link);
3132 if (r < 0)
3133 return r;
3134
1f241589
YW		 3135 if (!link->bridge_mdb_configured) {
3136 r = link_set_bridge_mdb(link);
3137 if (r < 0)
3138 return r;
3139 }
3140
3141 if (streq_ptr(link->kind, "bridge")) {
3142 Link *slave;
3143
3144 SET_FOREACH(slave, link->slaves) {
3145 if (slave->bridge_mdb_configured)
3146 continue;
3147
3148 r = link_set_bridge_mdb(slave);
3149 if (r < 0)
3150 link_enter_failed(slave);
3151 }
3152 }
3db468ea 3153
9c0a72f9
TG		 3154 return 0;
3155}
3156
3157static int link_carrier_lost(Link *link) {
3158 int r;
3159
3160 assert(link);
3161
25e992ba 3162 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3163 return 0;
3164
fbdb6605 3165 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3166 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3167 * configuration and stop the clients as well. */
97e7fb39
SS		 3168 if (link->setting_mtu)
3169 return 0;
3170
95355a28 3171 r = link_stop_clients(link, false);
9c0a72f9
TG		 3172 if (r < 0) {
3173 link_enter_failed(link);
3174 return r;
3175 }
3176
28464ae0
SS		 3177 if (link_dhcp4_server_enabled(link))
3178 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3179
3104883d
SS		 3180 r = link_drop_config(link);
3181 if (r < 0)
3182 return r;
3183
2c7b826d 3184 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
f258e948 3185 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3186 r = link_drop_foreign_config(link);
3187 if (r < 0)
3188 return r;
3189 }
3104883d 3190
0d4ad91d
AR		 3191 r = link_handle_bound_by_list(link);
3192 if (r < 0)
3193 return r;
3194
9c0a72f9
TG		 3195 return 0;
3196}
3197
3198int link_carrier_reset(Link *link) {
3199 int r;
3200
3201 assert(link);
3202
3203 if (link_has_carrier(link)) {
3204 r = link_carrier_lost(link);
3205 if (r < 0)
3206 return r;
3207
3208 r = link_carrier_gained(link);
3209 if (r < 0)
3210 return r;
3211
6a7a4e4d 3212 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3213 }
3214
3215 return 0;
3216}
3217
d236718c
DS		 3218/* This is called every time an interface admin state changes to up;
3219 * specifically, when IFF_UP flag changes from unset to set */
3220static int link_admin_state_up(Link *link) {
3221 int r;
3222
3223 /* We set the ipv6 mtu after the device mtu, but the kernel resets
3224 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
3225 * ipv6_mtu_set prevents this from trying to set it too early before
3226 * the link->network has been setup; we only need to reset it
3227 * here if we've already set it during normal initialization. */
3228 if (link->ipv6_mtu_set) {
3229 r = link_set_ipv6_mtu(link);
3230 if (r < 0)
3231 return r;
3232 }
3233
3234 return 0;
3235}
3236
1c4baffc 3237int link_update(Link *link, sd_netlink_message *m) {
572b21d9 3238 _cleanup_strv_free_ char **s = NULL;
c49b33ac 3239 struct ether_addr mac;
ca4e095a 3240 const char *ifname;
afe7fd56 3241 uint32_t mtu;
d236718c 3242 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 3243 int old_master, r;
22936833 3244
dd3efc09 3245 assert(link);
b8941f74 3246 assert(link->ifname);
22936833
TG		 3247 assert(m);
3248
7619683b 3249 if (link->state == LINK_STATE_LINGER) {
5238e957 3250 log_link_info(link, "Link re-added");
289e6774 3251 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3252
3253 r = link_new_carrier_maps(link);
3254 if (r < 0)
3255 return r;
7619683b
TG		 3256 }
3257
1c4baffc 3258 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3259 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3260 Manager *manager = link->manager;
b8941f74 3261
30de2b89 3262 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3263
30de2b89
YW		 3264 link_drop(link);
3265 r = link_add(manager, m, &link);
3266 if (r < 0)
3267 return r;
b8941f74
TG		 3268 }
3269
572b21d9
YW		 3270 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3271 if (r >= 0)
3272 strv_free_and_replace(link->alternative_names, s);
3273
1c4baffc 3274 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3275 if (r >= 0 && mtu > 0) {
3276 link->mtu = mtu;
4e964aa0 3277 if (link->original_mtu == 0) {
afe7fd56 3278 link->original_mtu = mtu;
6a7a4e4d 3279 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3280 }
3281
3282 if (link->dhcp_client) {
3c9b8860
TG		 3283 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3284 link->mtu);
fc95c359
YW		 3285 if (r < 0)
3286 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3287 }
7465dd22
PF		 3288
3289 if (link->radv) {
3290 r = sd_radv_set_mtu(link->radv, link->mtu);
3291 if (r < 0)
3292 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3293 }
9842de0d 3294 }
69629de9 3295
e9189a1f
TG		 3296 /* The kernel may broadcast NEWLINK messages without the MAC address
3297 set, simply ignore them. */
1c4baffc 3298 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
807667f7
YW		 3299 if (r >= 0 && memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN) != 0) {
3300
3301 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN);
3302
3303 log_link_debug(link, "Gained new MAC address: "
3304 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3305 mac.ether_addr_octet[0],
3306 mac.ether_addr_octet[1],
3307 mac.ether_addr_octet[2],
3308 mac.ether_addr_octet[3],
3309 mac.ether_addr_octet[4],
3310 mac.ether_addr_octet[5]);
3311
3312 if (link->ipv4ll) {
3313 bool restart = sd_ipv4ll_is_running(link->ipv4ll) > 0;
3314
3315 if (restart) {
3316 r = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 3317 if (r < 0)
807667f7 3318 return log_link_warning_errno(link, r, "Could not stop IPv4LL client: %m");
c49b33ac 3319 }
c49b33ac 3320
807667f7
YW		 3321 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
3322 if (r < 0)
3323 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
3324
3325 if (restart) {
3326 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d 3327 if (r < 0)
807667f7
YW		 3328 return log_link_warning_errno(link, r, "Could not restart IPv4LL client: %m");
3329 }
3330 }
3331
3332 if (link->dhcp_client) {
3333 r = sd_dhcp_client_set_mac(link->dhcp_client,
3334 (const uint8_t *) &link->mac,
3335 sizeof (link->mac),
3336 ARPHRD_ETHER);
3337 if (r < 0)
3338 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
3339
3340 r = dhcp4_set_client_identifier(link);
3341 if (r < 0)
3342 return log_link_warning_errno(link, r, "Could not set DHCP client identifier: %m");
3343 }
413708d1 3344
807667f7
YW		 3345 if (link->dhcp6_client) {
3346 const DUID* duid = link_get_duid(link);
3347 bool restart = sd_dhcp6_client_is_running(link->dhcp6_client) > 0;
3348
3349 if (restart) {
3350 r = sd_dhcp6_client_stop(link->dhcp6_client);
fff1f40c 3351 if (r < 0)
807667f7 3352 return log_link_warning_errno(link, r, "Could not stop DHCPv6 client: %m");
c49b33ac 3353 }
4138fb2c 3354
807667f7
YW		 3355 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
3356 (const uint8_t *) &link->mac,
3357 sizeof (link->mac),
3358 ARPHRD_ETHER);
3359 if (r < 0)
3360 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
8341a5c3 3361
807667f7
YW		 3362 if (link->network->iaid_set) {
3363 r = sd_dhcp6_client_set_iaid(link->dhcp6_client, link->network->iaid);
6a7a4e4d 3364 if (r < 0)
807667f7
YW		 3365 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3366 }
3367
3368 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3369 duid->type,
3370 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3371 duid->raw_data_len);
3372 if (r < 0)
3373 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
3374
3375 if (restart) {
3376 r = sd_dhcp6_client_start(link->dhcp6_client);
413708d1 3377 if (r < 0)
807667f7 3378 return log_link_warning_errno(link, r, "Could not restart DHCPv6 client: %m");
4138fb2c 3379 }
807667f7 3380 }
7465dd22 3381
807667f7
YW		 3382 if (link->radv) {
3383 bool restart = sd_radv_is_running(link->radv);
3384
3385 if (restart) {
3386 r = sd_radv_stop(link->radv);
7465dd22 3387 if (r < 0)
807667f7 3388 return log_link_warning_errno(link, r, "Could not stop Router Advertisement: %m");
7465dd22 3389 }
420d2058 3390
807667f7
YW		 3391 r = sd_radv_set_mac(link->radv, &link->mac);
3392 if (r < 0)
3393 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3394
3395 if (restart) {
3396 r = sd_radv_start(link->radv);
420d2058 3397 if (r < 0)
807667f7 3398 return log_link_warning_errno(link, r, "Could not restart Router Advertisement: %m");
420d2058 3399 }
c49b33ac 3400 }
807667f7
YW		 3401
3402 if (link->ndisc) {
3403 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3404 if (r < 0)
3405 return log_link_warning_errno(link, r, "Could not update MAC for NDisc: %m");
3406 }
4f882b2a
TG		 3407 }
3408
bb262ef0
YW		 3409 old_master = link->master_ifindex;
3410 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
3411
d236718c 3412 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 3413 had_carrier = link_has_carrier(link);
3414
bb262ef0 3415 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 3416 if (r < 0)
3417 return r;
3418
d236718c
DS		 3419 if (!link_was_admin_up && (link->flags & IFF_UP)) {
3420 log_link_info(link, "Link UP");
3421
3422 r = link_admin_state_up(link);
3423 if (r < 0)
3424 return r;
3425 } else if (link_was_admin_up && !(link->flags & IFF_UP))
3426 log_link_info(link, "Link DOWN");
3427
273eec24
LP		 3428 r = link_update_lldp(link);
3429 if (r < 0)
3430 return r;
3431
a61bb41c
TG		 3432 carrier_gained = !had_carrier && link_has_carrier(link);
3433 carrier_lost = had_carrier && !link_has_carrier(link);
3434
3435 if (carrier_gained) {
6a7a4e4d 3436 log_link_info(link, "Gained carrier");
a61bb41c 3437
9c0a72f9
TG		 3438 r = link_carrier_gained(link);
3439 if (r < 0)
3440 return r;
a61bb41c 3441 } else if (carrier_lost) {
6a7a4e4d 3442 log_link_info(link, "Lost carrier");
a61bb41c 3443
9c0a72f9
TG		 3444 r = link_carrier_lost(link);
3445 if (r < 0)
a61bb41c 3446 return r;
a61bb41c
TG		 3447 }
3448
3449 return 0;
dd3efc09 3450}
fe8db0c5 3451
b295beea
LP		 3452static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3453 bool space = false;
b295beea
LP		 3454 Link *link;
3455
3456 assert(f);
3457 assert(prefix);
3458
3459 if (hashmap_isempty(h))
3460 return;
3461
0d536673 3462 fputs(prefix, f);
90e74a66 3463 HASHMAP_FOREACH(link, h) {
b295beea 3464 if (space)
0d536673 3465 fputc(' ', f);
b295beea
LP		 3466
3467 fprintf(f, "%i", link->ifindex);
3468 space = true;
3469 }
3470
0d536673 3471 fputc('\n', f);
b295beea
LP		 3472}
3473
64581765 3474static void link_save_dns(Link *link, FILE *f, struct in_addr_full **dns, unsigned n_dns, bool *space) {
dddc8d1e 3475 for (unsigned j = 0; j < n_dns; j++) {
e77bd3fd 3476 const char *str;
15761549 3477
64581765
YW		 3478 if (dns[j]->ifindex != 0 && dns[j]->ifindex != link->ifindex)
3479 continue;
3480
e77bd3fd
YW		 3481 str = in_addr_full_to_string(dns[j]);
3482 if (!str)
15761549 3483 continue;
15761549
YW		 3484
3485 if (*space)
3486 fputc(' ', f);
e77bd3fd 3487 fputs(str, f);
15761549
YW		 3488 *space = true;
3489 }
3490}
3491
d5e172d2
ZJS		 3492static void serialize_addresses(
3493 FILE *f,
3494 const char *lvalue,
3495 bool *space,
3496 char **addresses,
3497 sd_dhcp_lease *lease,
3498 bool conditional,
ddb82ec2 3499 sd_dhcp_lease_server_type what,
d5e172d2
ZJS		 3500 sd_dhcp6_lease *lease6,
3501 bool conditional6,
3502 int (*lease6_get_addr)(sd_dhcp6_lease*, const struct in6_addr**),
3503 int (*lease6_get_fqdn)(sd_dhcp6_lease*, char ***)) {
3504 int r;
3505
3506 bool _space = false;
3507 if (!space)
3508 space = &_space;
3509
3510 if (lvalue)
3511 fprintf(f, "%s=", lvalue);
3512 fputstrv(f, addresses, NULL, space);
3513
3514 if (lease && conditional) {
3515 const struct in_addr *lease_addresses;
3516
3517 r = sd_dhcp_lease_get_servers(lease, what, &lease_addresses);
3518 if (r > 0)
d8bff5cc 3519 serialize_in_addrs(f, lease_addresses, r, space, in4_addr_is_non_local);
d5e172d2
ZJS		 3520 }
3521
3522 if (lease6 && conditional6 && lease6_get_addr) {
3523 const struct in6_addr *in6_addrs;
3524
3525 r = lease6_get_addr(lease6, &in6_addrs);
d8bff5cc
ZJS		 3526 if (r > 0)
3527 serialize_in6_addrs(f, in6_addrs, r, space);
d5e172d2
ZJS		 3528 }
3529
3530 if (lease6 && conditional6 && lease6_get_fqdn) {
3531 char **in6_hosts;
3532
3533 r = lease6_get_fqdn(lease6, &in6_hosts);
3534 if (r > 0)
3535 fputstrv(f, in6_hosts, NULL, space);
3536 }
3537
3538 if (lvalue)
3539 fputc('\n', f);
3540}
3541
fe8db0c5 3542int link_save(Link *link) {
d361b373 3543 const char *admin_state, *oper_state, *carrier_state, *address_state;
68a8723c 3544 _cleanup_free_ char *temp_path = NULL;
fe8db0c5
TG		 3545 _cleanup_fclose_ FILE *f = NULL;
3546 int r;
3547
3548 assert(link);
3549 assert(link->state_file);
68a8723c 3550 assert(link->lease_file);
bbf7c048
TG		 3551 assert(link->manager);
3552
370e9930 3553 if (link->state == LINK_STATE_LINGER) {
6990fb6b 3554 (void) unlink(link->state_file);
370e9930
TG		 3555 return 0;
3556 }
3557
34437b4f
LP		 3558 link_lldp_save(link);
3559
deb2e523
TG		 3560 admin_state = link_state_to_string(link->state);
3561 assert(admin_state);
3562
e375dcde
TG		 3563 oper_state = link_operstate_to_string(link->operstate);
3564 assert(oper_state);
deb2e523 3565
ac999bf0
YW		 3566 carrier_state = link_carrier_state_to_string(link->carrier_state);
3567 assert(carrier_state);
3568
3569 address_state = link_address_state_to_string(link->address_state);
3570 assert(address_state);
3571
fe8db0c5
TG		 3572 r = fopen_temporary(link->state_file, &f, &temp_path);
3573 if (r < 0)
6a7a4e4d 3574 goto fail;
fe8db0c5 3575
5512a963 3576 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3577
3578 fprintf(f,
3579 "# This is private data. Do not parse.\n"
deb2e523 3580 "ADMIN_STATE=%s\n"
ac999bf0
YW		 3581 "OPER_STATE=%s\n"
3582 "CARRIER_STATE=%s\n"
3583 "ADDRESS_STATE=%s\n",
3584 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 3585
bcb7a07e 3586 if (link->network) {
fe0e16db
YW		 3587 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
3588 const char *dhcp_domainname = NULL, *p;
fe0e16db 3589 bool space;
07bdc70d 3590
c1a38904
MTL		 3591 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3592 yes_no(link->network->required_for_online));
3593
d5e172d2
ZJS		 3594 LinkOperationalStateRange st = link->network->required_operstate_for_online;
3595 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s%s%s\n",
3596 strempty(link_operstate_to_string(st.min)),
3597 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? ":" : "",
3598 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? strempty(link_operstate_to_string(st.max)) : "");
4ac77d63 3599
adc5b2e2
TG		 3600 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3601
d5e172d2
ZJS		 3602 /************************************************************/
3603
0d536673 3604 fputs("DNS=", f);
ea352b40 3605 space = false;
15761549 3606 if (link->n_dns != (unsigned) -1)
64581765 3607 link_save_dns(link, f, link->dns, link->n_dns, &space);
15761549 3608 else
64581765 3609 link_save_dns(link, f, link->network->dns, link->network->n_dns, &space);
d5314fff 3610
d5e172d2
ZJS		 3611 serialize_addresses(f, NULL, &space,
3612 NULL,
3613 link->dhcp_lease,
3614 link->network->dhcp_use_dns,
ddb82ec2 3615 SD_DHCP_LEASE_DNS,
1633c457 3616 link->dhcp6_lease,
d5e172d2
ZJS		 3617 link->network->dhcp6_use_dns,
3618 sd_dhcp6_lease_get_dns,
3619 NULL);
1e7a0e21 3620
a8c10331 3621 /* Make sure to flush out old entries before we use the NDisc data */
1e7a0e21
LP		 3622 ndisc_vacuum(link);
3623
b296797f 3624 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3625 NDiscRDNSS *dd;
3626
90e74a66 3627 SET_FOREACH(dd, link->ndisc_rdnss)
d8bff5cc 3628 serialize_in6_addrs(f, &dd->address, 1, &space);
299d578f
SS		 3629 }
3630
3631 fputc('\n', f);
3632
d5e172d2
ZJS		 3633 /************************************************************/
3634
3635 serialize_addresses(f, "NTP", NULL,
3636 link->ntp ?: link->network->ntp,
3637 link->dhcp_lease,
3638 link->network->dhcp_use_ntp,
ddb82ec2 3639 SD_DHCP_LEASE_NTP,
1633c457 3640 link->dhcp6_lease,
d5e172d2
ZJS		 3641 link->network->dhcp6_use_ntp,
3642 sd_dhcp6_lease_get_ntp_addrs,
3643 sd_dhcp6_lease_get_ntp_fqdn);
3644
3645 serialize_addresses(f, "SIP", NULL,
2a71d57f 3646 NULL,
d5e172d2
ZJS		 3647 link->dhcp_lease,
3648 link->network->dhcp_use_sip,
ddb82ec2 3649 SD_DHCP_LEASE_SIP,
2a71d57f 3650 NULL, false, NULL, NULL);
d5e172d2
ZJS		 3651
3652 /************************************************************/
bd8f6538 3653
b2a81c0b 3654 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3655 if (link->dhcp_lease) {
b2a81c0b 3656 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3657 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3658 }
1633c457
YW		 3659 if (link->dhcp6_lease)
3660 (void) sd_dhcp6_lease_get_domains(link->dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3661 }
3662
fe0e16db
YW		 3663 fputs("DOMAINS=", f);
3664 space = false;
90e74a66 3665 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains)
fe0e16db 3666 fputs_with_space(f, p, NULL, &space);
07bdc70d 3667
1e7a0e21 3668 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP		 3669 if (dhcp_domainname)
3670 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3671 if (dhcp_domains)
3672 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3673 if (dhcp6_domains)
3674 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 3675 }
3676
3677 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
3678 NDiscDNSSL *dd;
1e7a0e21 3679
90e74a66 3680 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 3681 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3682 }
b2a81c0b 3683
0d536673 3684 fputc('\n', f);
6192b846 3685
d5e172d2
ZJS		 3686 /************************************************************/
3687
fe0e16db
YW		 3688 fputs("ROUTE_DOMAINS=", f);
3689 space = false;
90e74a66 3690 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains)
fe0e16db 3691 fputs_with_space(f, p, NULL, &space);
b2a81c0b 3692
1e7a0e21 3693 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
1e7a0e21
LP		 3694 if (dhcp_domainname)
3695 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3696 if (dhcp_domains)
3697 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3698 if (dhcp6_domains)
3699 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 3700 }
3701
3702 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3703 NDiscDNSSL *dd;
1e7a0e21 3704
90e74a66 3705 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 3706 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3707 }
b2a81c0b 3708
0d536673 3709 fputc('\n', f);
67272d15 3710
d5e172d2
ZJS		 3711 /************************************************************/
3712
3c9b8860 3713 fprintf(f, "LLMNR=%s\n",
15761549 3714 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
d5e172d2
ZJS		 3715
3716 /************************************************************/
3717
aaa297d4 3718 fprintf(f, "MDNS=%s\n",
15761549 3719 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
15761549 3720
d5e172d2
ZJS		 3721 /************************************************************/
3722
3723 int dns_default_route =
3724 link->dns_default_route >= 0 ? link->dns_default_route :
3725 link->network->dns_default_route;
3726 if (dns_default_route >= 0)
3727 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(dns_default_route));
3728
3729 /************************************************************/
3730
3731 DnsOverTlsMode dns_over_tls_mode =
3732 link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID ? link->dns_over_tls_mode :
3733 link->network->dns_over_tls_mode;
3734 if (dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3735 fprintf(f, "DNS_OVER_TLS=%s\n", dns_over_tls_mode_to_string(dns_over_tls_mode));
3736
3737 /************************************************************/
3738
3739 DnssecMode dnssec_mode =
3740 link->dnssec_mode != _DNSSEC_MODE_INVALID ? link->dnssec_mode :
3741 link->network->dnssec_mode;
3742 if (dnssec_mode != _DNSSEC_MODE_INVALID)
3743 fprintf(f, "DNSSEC=%s\n", dnssec_mode_to_string(dnssec_mode));
3744
3745 /************************************************************/
3746
3747 Set *nta_anchors = link->dnssec_negative_trust_anchors;
3748 if (set_isempty(nta_anchors))
3749 nta_anchors = link->network->dnssec_negative_trust_anchors;
3750
3751 if (!set_isempty(nta_anchors)) {
8a516214
LP		 3752 const char *n;
3753
0d536673 3754 fputs("DNSSEC_NTA=", f);
8a516214 3755 space = false;
90e74a66 3756 SET_FOREACH(n, nta_anchors)
d390f8ef 3757 fputs_with_space(f, n, NULL, &space);
0d536673 3758 fputc('\n', f);
8a516214
LP		 3759 }
3760
d5e172d2
ZJS		 3761 /************************************************************/
3762
3b31e2b7
YW		 3763 r = link_serialize_addresses(link, f);
3764 if (r < 0)
3765 goto fail;
c1eb9872 3766
d5e172d2
ZJS		 3767 /************************************************************/
3768
56519412
YW		 3769 r = link_serialize_routes(link, f);
3770 if (r < 0)
3771 goto fail;
bcb7a07e 3772 }
7374f9d8 3773
b295beea
LP		 3774 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3775 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3776
8eb9058d 3777 if (link->dhcp_lease) {
bd91b83e 3778 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3779 if (r < 0)
c2d6bd61 3780 goto fail;
fe8db0c5 3781
7374f9d8 3782 fprintf(f,
b0e39c82
TG		 3783 "DHCP_LEASE=%s\n",
3784 link->lease_file);
deb2e523 3785 } else
6990fb6b 3786 (void) unlink(link->lease_file);
fe8db0c5 3787
0bc70f1d
TG		 3788 if (link->ipv4ll) {
3789 struct in_addr address;
3790
3791 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3792 if (r >= 0) {
0d536673 3793 fputs("IPV4LL_ADDRESS=", f);
072320ea 3794 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3795 fputc('\n', f);
0bc70f1d
TG		 3796 }
3797 }
3798
7e738e7b
SS		 3799 if (link->dhcp6_client) {
3800 _cleanup_free_ char *duid = NULL;
3801 uint32_t iaid;
3802
3803 r = sd_dhcp6_client_get_iaid(link->dhcp6_client, &iaid);
3804 if (r >= 0)
3805 fprintf(f, "DHCP6_CLIENT_IAID=0x%x\n", iaid);
3806
3807 r = sd_dhcp6_client_duid_as_string(link->dhcp6_client, &duid);
3808 if (r >= 0)
3809 fprintf(f, "DHCP6_CLIENT_DUID=%s\n", duid);
3810 }
18d8a2cf 3811
c2d6bd61
LP		 3812 r = fflush_and_check(f);
3813 if (r < 0)
3814 goto fail;
fe8db0c5 3815
c2d6bd61 3816 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3817 r = -errno;
c2d6bd61 3818 goto fail;
fe8db0c5
TG		 3819 }
3820
c2d6bd61 3821 return 0;
dacd6cee 3822
c2d6bd61 3823fail:
6a7a4e4d 3824 (void) unlink(link->state_file);
6a7a4e4d
LP		 3825 if (temp_path)
3826 (void) unlink(temp_path);
3827
dacd6cee 3828 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3829}
3830
84de38c5
TG		 3831/* The serialized state in /run is no longer up-to-date. */
3832void link_dirty(Link *link) {
3833 int r;
3834
3835 assert(link);
3836
0c241a37
SS		 3837 /* mark manager dirty as link is dirty */
3838 manager_dirty(link->manager);
3839
de7fef4b 3840 r = set_ensure_put(&link->manager->dirty_links, NULL, link);
0c241a37 3841 if (r <= 0)
de7fef4b 3842 /* Ignore allocation errors and don't take another ref if the link was already dirty */
84de38c5 3843 return;
84de38c5
TG		 3844 link_ref(link);
3845}
3846
3847/* The serialized state in /run is up-to-date */
3848void link_clean(Link *link) {
3849 assert(link);
3850 assert(link->manager);
3851
1046bf9b 3852 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 3853}
3854
c2a65950
YW		 3855int link_save_and_clean(Link *link) {
3856 int r;
3857
3858 r = link_save(link);
3859 if (r < 0)
3860 return r;
3861
3862 link_clean(link);
3863 return 0;
3864}
3865
fe8db0c5 3866static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3867 [LINK_STATE_PENDING] = "pending",
bd08ce56 3868 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 3869 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 3870 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3871 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3872 [LINK_STATE_FAILED] = "failed",
370e9930 3873 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3874};
3875
3876DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
5ecb131d
YW		 3877
3878int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg) {
3879 const char *err_msg = NULL;
3880
3881 (void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg);
d157714b
YW		 3882 return log_link_full_errno(link, level, err,
3883 "%s: %s%s%s%m",
3884 msg,
3885 strempty(err_msg),
3886 err_msg && !endswith(err_msg, ".") ? "." : "",
3887 err_msg ? " " : "");
5ecb131d 3888}
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