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[thirdparty/systemd.git] / src / network / networkd-link.c
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53e1b683 1/* SPDX-License-Identifier: LGPL-2.1+ */
f579559b 2
9aa5d8ba 3#include <netinet/in.h>
f579559b 4#include <linux/if.h>
4cc7a82c 5#include <unistd.h>
f579559b 6
b5efdb8a 7#include "alloc-util.h"
1346b1f0 8#include "bus-util.h"
27dfc982 9#include "dhcp-identifier.h"
bd91b83e 10#include "dhcp-lease-internal.h"
686d13b9 11#include "env-file.h"
3ffd4af2 12#include "fd-util.h"
cf1d700d 13#include "fileio.h"
ef118d00 14#include "missing_network.h"
4799f19e 15#include "netdev/bond.h"
9a81f119 16#include "netdev/bridge.h"
f410d463 17#include "netdev/ipvlan.h"
bdb9f580 18#include "netdev/vrf.h"
cf1d700d 19#include "netlink-util.h"
c6f7c917 20#include "network-internal.h"
3ddcbeea 21#include "networkd-can.h"
8fcf1d61 22#include "networkd-dhcp-server.h"
ca5ad760
YW		 23#include "networkd-dhcp4.h"
24#include "networkd-dhcp6.h"
25#include "networkd-ipv4ll.h"
a0e5c15d 26#include "networkd-ipv6-proxy-ndp.h"
6a1af3d4
YW		 27#include "networkd-link-bus.h"
28#include "networkd-link.h"
8e1ad1ea 29#include "networkd-lldp-tx.h"
23f53b99 30#include "networkd-manager.h"
1e7a0e21 31#include "networkd-ndisc.h"
e4a71bf3 32#include "networkd-neighbor.h"
7465dd22 33#include "networkd-radv.h"
bce67bbe 34#include "networkd-routing-policy-rule.h"
cf1d700d
TG		 35#include "set.h"
36#include "socket-util.h"
15a5e950 37#include "stdio-util.h"
8b43440b 38#include "string-table.h"
51517f9e 39#include "strv.h"
62e021a9 40#include "sysctl-util.h"
e4de7287 41#include "tmpfile-util.h"
299ad32d 42#include "udev-util.h"
cf1d700d
TG		 43#include "util.h"
44#include "virt.h"
fc2f9534 45
bdb9f580
YW		 46uint32_t link_get_vrf_table(Link *link) {
47 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
48}
49
50uint32_t link_get_dhcp_route_table(Link *link) {
51 /* When the interface is part of an VRF use the VRFs routing table, unless
52 * another table is explicitly specified. */
53 if (link->network->dhcp_route_table_set)
54 return link->network->dhcp_route_table;
55 return link_get_vrf_table(link);
56}
57
58uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
59 if (link->network->ipv6_accept_ra_route_table_set)
60 return link->network->ipv6_accept_ra_route_table;
61 return link_get_vrf_table(link);
62}
63
f24648a6
YW		 64DUID* link_get_duid(Link *link) {
65 if (link->network->duid.type != _DUID_TYPE_INVALID)
66 return &link->network->duid;
67 else
68 return &link->manager->duid;
69}
70
bafa9641
YW		 71int link_sysctl_ipv6_enabled(Link *link) {
72 _cleanup_free_ char *value = NULL;
73 int r;
74
593aee8f
YW		 75 assert(link);
76 assert(link->ifname);
77
78 if (link->sysctl_ipv6_enabled >= 0)
79 return link->sysctl_ipv6_enabled;
80
573e9a33
ZJS		 81 const char *ifname = link->ifname; /* work around bogus gcc warning */
82 r = sysctl_read_ip_property(AF_INET6, ifname, "disable_ipv6", &value);
bafa9641
YW		 83 if (r < 0)
84 return log_link_warning_errno(link, r,
85 "Failed to read net.ipv6.conf.%s.disable_ipv6 sysctl property: %m",
573e9a33 86 ifname);
bafa9641
YW		 87
88 link->sysctl_ipv6_enabled = value[0] == '0';
89 return link->sysctl_ipv6_enabled;
90}
91
b9d74c40
LP		 92static bool link_dhcp6_enabled(Link *link) {
93 assert(link);
94
fa709992
LP		 95 if (!socket_ipv6_is_supported())
96 return false;
97
78c958f8
TG		 98 if (link->flags & IFF_LOOPBACK)
99 return false;
100
101 if (!link->network)
102 return false;
103
f2bfcdb9
YW		 104 if (link->network->bond)
105 return false;
106
cab042b8 107 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
af9ba57a
YW		 108 return false;
109
bafa9641 110 if (link_sysctl_ipv6_enabled(link) == 0)
4b600505
YW		 111 return false;
112
e0ee46f2 113 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 114}
115
b9d74c40
LP		 116static bool link_dhcp4_enabled(Link *link) {
117 assert(link);
118
78c958f8
TG		 119 if (link->flags & IFF_LOOPBACK)
120 return false;
121
122 if (!link->network)
123 return false;
124
f2bfcdb9
YW		 125 if (link->network->bond)
126 return false;
127
cab042b8 128 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
af9ba57a
YW		 129 return false;
130
e0ee46f2 131 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 132}
133
b9d74c40
LP		 134static bool link_dhcp4_server_enabled(Link *link) {
135 assert(link);
136
78c958f8
TG		 137 if (link->flags & IFF_LOOPBACK)
138 return false;
139
140 if (!link->network)
141 return false;
142
f2bfcdb9
YW		 143 if (link->network->bond)
144 return false;
145
cab042b8 146 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
af9ba57a
YW		 147 return false;
148
78c958f8
TG		 149 return link->network->dhcp_server;
150}
151
910feb78 152bool link_ipv4ll_enabled(Link *link, AddressFamilyBoolean mask) {
b9d74c40 153 assert(link);
910feb78 154 assert((mask & ~(ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) == 0);
b9d74c40 155
78c958f8
TG		 156 if (link->flags & IFF_LOOPBACK)
157 return false;
158
159 if (!link->network)
160 return false;
161
98d20a17 162 if (STRPTR_IN_SET(link->kind,
163 "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
164 "vti6", "can", "vcan", "vxcan", "nlmon", "xfrm"))
a8f5bba6
JD		 165 return false;
166
f410d463
YW		 167 /* L3 or L3S mode do not support ARP. */
168 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
169 return false;
170
f2bfcdb9
YW		 171 if (link->network->bond)
172 return false;
173
910feb78 174 return link->network->link_local & mask;
8bc17bb3
SS		 175}
176
b9d74c40
LP		 177static bool link_ipv6ll_enabled(Link *link) {
178 assert(link);
179
fa709992
LP		 180 if (!socket_ipv6_is_supported())
181 return false;
182
d0d6a4cd
TG		 183 if (link->flags & IFF_LOOPBACK)
184 return false;
185
186 if (!link->network)
187 return false;
188
d61e4c5b 189 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "can", "vcan", "vxcan", "nlmon"))
a8f5bba6
JD		 190 return false;
191
f2bfcdb9
YW		 192 if (link->network->bond)
193 return false;
194
bafa9641 195 if (link_sysctl_ipv6_enabled(link) == 0)
4b600505
YW		 196 return false;
197
e0ee46f2 198 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 199}
200
439689c6
SS		 201static bool link_ipv6_enabled(Link *link) {
202 assert(link);
203
204 if (!socket_ipv6_is_supported())
205 return false;
206
b102cdca 207 if (link->network->bond)
2b00a4e0
TY		 208 return false;
209
bafa9641 210 if (link_sysctl_ipv6_enabled(link) == 0)
4b600505
YW		 211 return false;
212
cab042b8 213 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
af9ba57a
YW		 214 return false;
215
4cef7fe3
TY		 216 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
217 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
439689c6
SS		 218}
219
7465dd22
PF		 220static bool link_radv_enabled(Link *link) {
221 assert(link);
222
223 if (!link_ipv6ll_enabled(link))
224 return false;
225
55a7c78b 226 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 227}
228
769d324c 229static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 230 assert(link);
231
5a8bcb67
LP		 232 if (link->flags & IFF_LOOPBACK)
233 return false;
234
235 if (!link->network)
236 return false;
237
765afd5c
LP		 238 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
239 return false;
240
e0ee46f2 241 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 242}
243
244static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 245 assert(link);
765afd5c
LP		 246
247 if (!socket_ipv6_is_supported())
248 return false;
249
769d324c
LP		 250 if (link->flags & IFF_LOOPBACK)
251 return false;
252
253 if (!link->network)
254 return false;
255
765afd5c
LP		 256 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
257 return false;
258
bafa9641 259 if (link_sysctl_ipv6_enabled(link) == 0)
4b600505
YW		 260 return false;
261
e0ee46f2 262 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 263}
264
23d8b221
SS		 265static bool link_proxy_arp_enabled(Link *link) {
266 assert(link);
267
268 if (link->flags & IFF_LOOPBACK)
269 return false;
270
271 if (!link->network)
272 return false;
273
274 if (link->network->proxy_arp < 0)
275 return false;
276
277 return true;
278}
279
b9d74c40
LP		 280static bool link_ipv6_accept_ra_enabled(Link *link) {
281 assert(link);
282
fa709992
LP		 283 if (!socket_ipv6_is_supported())
284 return false;
285
f5a8c43f
TG		 286 if (link->flags & IFF_LOOPBACK)
287 return false;
288
289 if (!link->network)
290 return false;
291
702c979f
SS		 292 if (!link_ipv6ll_enabled(link))
293 return false;
294
f5a8c43f
TG		 295 /* If unset use system default (enabled if local forwarding is disabled.
296 * disabled if local forwarding is enabled).
297 * If set, ignore or enforce RA independent of local forwarding state.
298 */
299 if (link->network->ipv6_accept_ra < 0)
300 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
301 return !link_ipv6_forward_enabled(link);
302 else if (link->network->ipv6_accept_ra > 0)
303 /* accept RA even if ip_forward is enabled */
304 return true;
305 else
306 /* ignore RA */
307 return false;
308}
309
1f0d9695 310static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 311 assert(link);
d68e2e59
LP		 312
313 if (!socket_ipv6_is_supported())
314 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
315
49092e22 316 if (link->flags & IFF_LOOPBACK)
1f0d9695 317 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 318
319 if (!link->network)
1f0d9695 320 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 321
322 return link->network->ipv6_privacy_extensions;
323}
324
439689c6 325static int link_enable_ipv6(Link *link) {
439689c6
SS		 326 bool disabled;
327 int r;
328
329 if (link->flags & IFF_LOOPBACK)
330 return 0;
331
332 disabled = !link_ipv6_enabled(link);
333
62e021a9 334 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", disabled);
439689c6 335 if (r < 0)
c98b3545 336 log_link_warning_errno(link, r, "Cannot %s IPv6: %m", enable_disable(!disabled));
2d37cd53 337 else
b106c586 338 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
439689c6
SS		 339
340 return 0;
341}
342
34bf3c00
YW		 343static bool link_is_enslaved(Link *link) {
344 if (link->flags & IFF_SLAVE)
345 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
346 return true;
347
34bf3c00
YW		 348 if (!link->network)
349 return false;
350
bb262ef0 351 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 352 return true;
353
bb262ef0
YW		 354 /* TODO: add conditions for other netdevs. */
355
34bf3c00
YW		 356 return false;
357}
358
45e11abf
YW		 359static void link_update_master_operstate(Link *link, NetDev *netdev) {
360 Link *master;
361
362 if (!netdev)
363 return;
364
365 if (link_get(link->manager, netdev->ifindex, &master) < 0)
366 return;
367
368 link_update_operstate(master, true);
369}
370
371void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 372 LinkOperationalState operstate;
1678fbb3
YW		 373 LinkCarrierState carrier_state;
374 LinkAddressState address_state;
35c5a9ca 375 _cleanup_strv_free_ char **p = NULL;
1678fbb3 376 uint8_t scope = RT_SCOPE_NOWHERE;
35c5a9ca 377 bool changed = false;
1678fbb3 378 Address *address;
45e11abf 379 Iterator i;
14153d1b 380
84de38c5
TG		 381 assert(link);
382
383 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 384 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 385 else if (link_has_carrier(link)) {
1678fbb3
YW		 386 if (link_is_enslaved(link))
387 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 388 else
1678fbb3 389 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 390 } else if (link->flags & IFF_UP)
1678fbb3 391 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 392 else
1678fbb3 393 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 394
1678fbb3 395 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 396 Link *slave;
397
5f707e12 398 SET_FOREACH(slave, link->slaves, i) {
959f65d3 399 link_update_operstate(slave, false);
84de38c5 400
1678fbb3
YW		 401 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
402 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 403 }
959f65d3 404 }
84de38c5 405
1678fbb3
YW		 406 SET_FOREACH(address, link->addresses, i) {
407 if (!address_is_ready(address))
408 continue;
84de38c5 409
1678fbb3
YW		 410 if (address->scope < scope)
411 scope = address->scope;
412 }
84de38c5 413
1678fbb3
YW		 414 /* for operstate we also take foreign addresses into account */
415 SET_FOREACH(address, link->addresses_foreign, i) {
416 if (!address_is_ready(address))
417 continue;
418
419 if (address->scope < scope)
420 scope = address->scope;
421 }
422
423 if (scope < RT_SCOPE_SITE)
424 /* universally accessible addresses found */
425 address_state = LINK_ADDRESS_STATE_ROUTABLE;
426 else if (scope < RT_SCOPE_HOST)
427 /* only link or site local addresses found */
428 address_state = LINK_ADDRESS_STATE_DEGRADED;
84de38c5 429 else
1678fbb3
YW		 430 /* no useful addresses found */
431 address_state = LINK_ADDRESS_STATE_OFF;
432
433 /* Mapping of address and carrier state vs operational state
434 * carrier state
435 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
436 * ------------------------------------------------------------------------------
437 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
438 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
439 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
440 */
84de38c5 441
1678fbb3
YW		 442 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
443 operstate = (LinkOperationalState) carrier_state;
444 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
445 operstate = LINK_OPERSTATE_ROUTABLE;
446 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
447 operstate = LINK_OPERSTATE_DEGRADED;
448 else
14153d1b
YW		 449 operstate = LINK_OPERSTATE_ENSLAVED;
450
35c5a9ca
YW		 451 if (link->carrier_state != carrier_state) {
452 link->carrier_state = carrier_state;
453 changed = true;
454 if (strv_extend(&p, "CarrierState") < 0)
455 log_oom();
456 }
959f65d3 457
35c5a9ca
YW		 458 if (link->address_state != address_state) {
459 link->address_state = address_state;
460 changed = true;
461 if (strv_extend(&p, "AddressState") < 0)
462 log_oom();
959f65d3
YW		 463 }
464
84de38c5
TG		 465 if (link->operstate != operstate) {
466 link->operstate = operstate;
35c5a9ca
YW		 467 changed = true;
468 if (strv_extend(&p, "OperationalState") < 0)
469 log_oom();
84de38c5 470 }
959f65d3 471
35c5a9ca
YW		 472 if (p)
473 link_send_changed_strv(link, p);
474 if (changed)
475 link_dirty(link);
476
45e11abf
YW		 477 if (also_update_master && link->network) {
478 link_update_master_operstate(link, link->network->bond);
479 link_update_master_operstate(link, link->network->bridge);
959f65d3 480 }
84de38c5
TG		 481}
482
51d18171
TG		 483#define FLAG_STRING(string, flag, old, new) \
484 (((old ^ new) & flag) \
485 ? ((old & flag) ? (" -" string) : (" +" string)) \
486 : "")
487
bb262ef0 488static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 489 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
490 uint8_t operstate;
491 int r;
492
493 assert(link);
494
495 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 496 if (r < 0)
497 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 498
1c4baffc 499 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 500 if (r < 0)
501 /* if we got a message without operstate, take it to mean
502 the state was unchanged */
503 operstate = link->kernel_operstate;
504
bb262ef0 505 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 506 return 0;
507
508 if (link->flags != flags) {
6a7a4e4d 509 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		 510 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
511 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
512 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
513 FLAG_STRING("UP", IFF_UP, link->flags, flags),
514 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
515 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
516 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
517 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
518 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
519 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
520 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
521 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
522 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
523 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
524 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
525 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
526 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
527 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
528 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
529
530 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
531 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
532 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
533 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
534 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
535 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
536 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
537 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
538
539 /* link flags are currently at most 18 bits, let's align to
540 * printing 20 */
541 if (unknown_flags_added)
79008bdd 542 log_link_debug(link,
6a7a4e4d 543 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 544 unknown_flags_added);
545
546 if (unknown_flags_removed)
79008bdd 547 log_link_debug(link,
6a7a4e4d 548 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 549 unknown_flags_removed);
550 }
551
552 link->flags = flags;
553 link->kernel_operstate = operstate;
554
959f65d3 555 link_update_operstate(link, true);
51d18171
TG		 556
557 return 0;
558}
559
1c4baffc 560static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 561 _cleanup_(link_unrefp) Link *link = NULL;
505f8da7 562 uint16_t type;
6cad256d 563 const char *ifname, *kind = NULL;
505f8da7 564 int r, ifindex;
b710e6b6 565 unsigned short iftype;
f579559b 566
0c2f9b84 567 assert(manager);
505f8da7 568 assert(message);
f579559b
TG		 569 assert(ret);
570
6cad256d
TJ		 571 /* check for link kind */
572 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
573 if (r == 0) {
db2f8a2e 574 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 575 r = sd_netlink_message_exit_container(message);
576 if (r < 0)
577 return r;
578 }
579
1c4baffc 580 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 581 if (r < 0)
582 return r;
583 else if (type != RTM_NEWLINK)
584 return -EINVAL;
585
586 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
587 if (r < 0)
588 return r;
589 else if (ifindex <= 0)
590 return -EINVAL;
591
b710e6b6
LP		 592 r = sd_rtnl_message_link_get_type(message, &iftype);
593 if (r < 0)
594 return r;
595
1c4baffc 596 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 597 if (r < 0)
598 return r;
599
17f9c355 600 link = new(Link, 1);
f579559b
TG		 601 if (!link)
602 return -ENOMEM;
603
17f9c355
YW		 604 *link = (Link) {
605 .n_ref = 1,
606 .manager = manager,
607 .state = LINK_STATE_PENDING,
608 .rtnl_extended_attrs = true,
609 .ifindex = ifindex,
610 .iftype = iftype,
bafa9641 611 .sysctl_ipv6_enabled = -1,
17f9c355
YW		 612 };
613
505f8da7
TG		 614 link->ifname = strdup(ifname);
615 if (!link->ifname)
616 return -ENOMEM;
f579559b 617
6cad256d
TJ		 618 if (kind) {
619 link->kind = strdup(kind);
620 if (!link->kind)
621 return -ENOMEM;
622 }
623
cbff7170
TJ		 624 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
625 if (r < 0)
626 log_link_debug_errno(link, r, "New device has no master, continuing without");
627
1c4baffc 628 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 629 if (r < 0)
34437b4f 630 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 631
34437b4f 632 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 633 return -ENOMEM;
fe8db0c5 634
34437b4f 635 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 636 return -ENOMEM;
637
34437b4f 638 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 639 return -ENOMEM;
640
d5099efc 641 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 642 if (r < 0)
643 return r;
644
645 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 646 if (r < 0)
647 return r;
648
bb262ef0 649 r = link_update_flags(link, message, false);
51d18171
TG		 650 if (r < 0)
651 return r;
652
1cc6c93a 653 *ret = TAKE_PTR(link);
f579559b
TG		 654
655 return 0;
656}
657
8301aa0b 658static Link *link_free(Link *link) {
428fd0a7
TG		 659 Address *address;
660
8301aa0b 661 assert(link);
f579559b 662
f535e354
YW		 663 link->routes = set_free_with_destructor(link->routes, route_free);
664 link->routes_foreign = set_free_with_destructor(link->routes_foreign, route_free);
adda1ed9 665
f535e354
YW		 666 link->addresses = set_free_with_destructor(link->addresses, address_free);
667 link->addresses_foreign = set_free_with_destructor(link->addresses_foreign, address_free);
adda1ed9 668
11bf3cce
LP		 669 while ((address = link->pool_addresses)) {
670 LIST_REMOVE(addresses, link->pool_addresses, address);
671 address_free(address);
672 }
673
bfcdba8d 674 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 675 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 676 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 677
7272b25e 678 link_lldp_emit_stop(link);
8e1ad1ea 679
68a8723c
TG		 680 free(link->lease_file);
681
4afd3348 682 sd_lldp_unref(link->lldp);
49699bac
SS		 683 free(link->lldp_file);
684
c69305ff
LP		 685 ndisc_flush(link);
686
56cd007a 687 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 688 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 689 sd_ndisc_unref(link->ndisc);
7465dd22 690 sd_radv_unref(link->radv);
1e7a0e21 691
c166a070 692 free(link->ifname);
ceac4078 693 free(link->kind);
6cad256d 694
db2f8a2e 695 (void) unlink(link->state_file);
fe8db0c5 696 free(link->state_file);
c166a070 697
51517f9e 698 sd_device_unref(link->sd_device);
b5db00e5 699
0d4ad91d 700 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 701 hashmap_free(link->bound_by_links);
702
5f707e12 703 set_free_with_destructor(link->slaves, link_unref);
033295c1 704
c9c908a6
YW		 705 network_unref(link->network);
706
8301aa0b 707 return mfree(link);
14b746f7
TG		 708}
709
8301aa0b 710DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 711
11a7f229
TG		 712int link_get(Manager *m, int ifindex, Link **ret) {
713 Link *link;
11a7f229
TG		 714
715 assert(m);
11a7f229
TG		 716 assert(ifindex);
717 assert(ret);
718
ae06ab10 719 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 720 if (!link)
721 return -ENODEV;
722
723 *ret = link;
724
725 return 0;
726}
727
af9ba57a 728void link_set_state(Link *link, LinkState state) {
e331e246
TG		 729 assert(link);
730
731 if (link->state == state)
732 return;
733
0beb9542
YW		 734 log_link_debug(link, "State changed: %s -> %s",
735 link_state_to_string(link->state),
736 link_state_to_string(state));
737
e331e246
TG		 738 link->state = state;
739
740 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 741}
742
57bd6899
TG		 743static void link_enter_unmanaged(Link *link) {
744 assert(link);
745
e331e246 746 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 747
84de38c5 748 link_dirty(link);
57bd6899
TG		 749}
750
95355a28 751int link_stop_clients(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 752 int r = 0, k;
753
754 assert(link);
755 assert(link->manager);
756 assert(link->manager->event);
757
d03073dd
YW		 758 dhcp4_release_old_lease(link);
759
95355a28
YW		 760 if (link->dhcp_client && (!may_keep_dhcp || !link->network ||
761 !FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP))) {
111bb8f9 762 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 763 if (k < 0)
36c7d709 764 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 765 }
766
ba179154 767 if (link->ipv4ll) {
111bb8f9 768 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 769 if (k < 0)
36c7d709 770 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 771 }
772
f5a8c43f
TG		 773 if (link->dhcp6_client) {
774 k = sd_dhcp6_client_stop(link->dhcp6_client);
775 if (k < 0)
36c7d709 776 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 777 }
4138fb2c 778
1e7a0e21
LP		 779 if (link->ndisc) {
780 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 781 if (k < 0)
36c7d709 782 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 783 }
784
7465dd22
PF		 785 if (link->radv) {
786 k = sd_radv_stop(link->radv);
787 if (k < 0)
788 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
789 }
790
7272b25e 791 link_lldp_emit_stop(link);
111bb8f9
TG		 792 return r;
793}
794
b22d8a00 795void link_enter_failed(Link *link) {
ef1ba606 796 assert(link);
f882c247 797
370e9930 798 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 799 return;
800
6a7a4e4d 801 log_link_warning(link, "Failed");
449f7554 802
e331e246 803 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 804
95355a28 805 link_stop_clients(link, false);
111bb8f9 806
84de38c5 807 link_dirty(link);
f882c247
TG		 808}
809
7033af49
YW		 810static int link_join_netdevs_after_configured(Link *link) {
811 NetDev *netdev;
812 Iterator i;
813 int r;
814
815 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
816 if (netdev->ifindex > 0)
817 /* Assume already enslaved. */
818 continue;
819
820 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
821 continue;
822
823 log_struct(LOG_DEBUG,
824 LOG_LINK_INTERFACE(link),
825 LOG_NETDEV_INTERFACE(netdev),
826 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
827
828 r = netdev_join(netdev, link, NULL);
829 if (r < 0)
830 return log_struct_errno(LOG_WARNING, r,
831 LOG_LINK_INTERFACE(link),
832 LOG_NETDEV_INTERFACE(netdev),
833 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
834 }
835
836 return 0;
837}
838
e3a7b048 839static void link_enter_configured(Link *link) {
dd43110f
TG		 840 assert(link);
841 assert(link->network);
e3a7b048 842
289e6774 843 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 844 return;
dd43110f 845
6a7a4e4d 846 log_link_info(link, "Configured");
dd43110f 847
e331e246 848 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 849
7033af49
YW		 850 (void) link_join_netdevs_after_configured(link);
851
84de38c5 852 link_dirty(link);
dd43110f
TG		 853}
854
47079967 855static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 856 RoutingPolicyRule *rule, *rrule = NULL;
857 int r;
858
859 assert(link);
860 assert(link->network);
861
2428613f
YW		 862 link_set_state(link, LINK_STATE_CONFIGURING);
863 link->routing_policy_rules_configured = false;
864
8a9b3a23 865 LIST_FOREACH(rules, rule, link->network->rules) {
b80a511b 866 r = routing_policy_rule_get(link->manager, rule, &rrule);
ff14e2eb
YW		 867 if (r >= 0) {
868 if (r == 0)
869 (void) routing_policy_rule_make_local(link->manager, rrule);
8a9b3a23
SS		 870 continue;
871 }
872
9f08a578 873 r = routing_policy_rule_configure(rule, link, NULL);
8a9b3a23
SS		 874 if (r < 0) {
875 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
876 link_enter_failed(link);
877 return r;
878 }
7ef7e550
YW		 879 if (r > 0)
880 link->routing_policy_rule_messages++;
8a9b3a23
SS		 881 }
882
883 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 884 if (link->routing_policy_rule_messages == 0) {
885 link->routing_policy_rules_configured = true;
886 link_check_ready(link);
887 } else
888 log_link_debug(link, "Setting routing policy rules");
8a9b3a23
SS		 889
890 return 0;
891}
892
302a796f 893static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 894 int r;
895
1046bf9b 896 assert(link);
7715629e 897 assert(link->route_messages > 0);
289e6774
WKI		 898 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
899 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 900
7715629e 901 link->route_messages--;
f882c247 902
77a008c0 903 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 904 return 1;
905
1c4baffc 906 r = sd_netlink_message_get_errno(m);
c166a070 907 if (r < 0 && r != -EEXIST)
a2fae7bb 908 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 909
7715629e 910 if (link->route_messages == 0) {
6a7a4e4d 911 log_link_debug(link, "Routes set");
7715629e 912 link->static_routes_configured = true;
8012cd39 913 link_check_ready(link);
dd3efc09 914 }
f882c247
TG		 915
916 return 1;
917}
918
b5799eeb 919int link_request_set_routes(Link *link) {
bf61b05a
LP		 920 enum {
921 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
922 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
923 _PHASE_MAX
924 } phase;
a6cc569e 925 Route *rt;
f882c247
TG		 926 int r;
927
928 assert(link);
929 assert(link->network);
c42ff3a1
WKI		 930 assert(link->addresses_configured);
931 assert(link->address_messages == 0);
289e6774 932 assert(link->state != _LINK_STATE_INVALID);
f882c247 933
289e6774 934 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 935 link->static_routes_configured = false;
27c34f73 936
47079967 937 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 938 if (r < 0)
939 return r;
f882c247 940
bf61b05a
LP		 941 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
942 for (phase = 0; phase < _PHASE_MAX; phase++)
943 LIST_FOREACH(routes, rt, link->network->static_routes) {
0d34228f 944
bf61b05a
LP		 945 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
946 continue;
a6cc569e 947
0d34228f
SS		 948 r = route_configure(rt, link, route_handler);
949 if (r < 0) {
950 log_link_warning_errno(link, r, "Could not set routes: %m");
951 link_enter_failed(link);
952 return r;
953 }
c4423317
YW		 954 if (r > 0)
955 link->route_messages++;
0d34228f 956 }
f5be5601 957
7715629e
ST		 958 if (link->route_messages == 0) {
959 link->static_routes_configured = true;
8012cd39 960 link_check_ready(link);
431ca2ce 961 } else
6a7a4e4d 962 log_link_debug(link, "Setting routes");
f882c247
TG		 963
964 return 0;
965}
966
6accfd31
DA		 967void link_check_ready(Link *link) {
968 Address *a;
969 Iterator i;
970
971 assert(link);
972
973 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
974 return;
975
976 if (!link->network)
977 return;
978
979 if (!link->addresses_configured)
980 return;
981
982 if (!link->neighbors_configured)
983 return;
984
6aa5773b
DA		 985 SET_FOREACH(a, link->addresses, i)
986 if (!address_is_ready(a))
987 return;
988
989 if (!link->addresses_ready) {
990 link->addresses_ready = true;
991 link_request_set_routes(link);
710ce9e5 992 return;
6aa5773b
DA		 993 }
994
6accfd31
DA		 995 if (!link->static_routes_configured)
996 return;
997
998 if (!link->routing_policy_rules_configured)
999 return;
1000
463797c1 1001 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
6accfd31 1002
463797c1
YW		 1003 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !(link->ipv4ll_address && link->ipv4ll_route))
1004 return;
6accfd31 1005
463797c1
YW		 1006 if (link_ipv6ll_enabled(link) &&
1007 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
1008 return;
6accfd31 1009
463797c1
YW		 1010 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
1011 !link->dhcp4_configured &&
1012 !link->dhcp6_configured &&
1013 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address && link->ipv4ll_route))
1014 /* When DHCP is enabled, at least one protocol must provide an address, or
1015 * an IPv4ll fallback address must be configured. */
1016 return;
1017
1018 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
1019 return;
1020 }
6accfd31 1021
6accfd31
DA		 1022 if (link->state != LINK_STATE_CONFIGURED)
1023 link_enter_configured(link);
1024
1025 return;
1026}
1027
e4a71bf3
WKI		 1028static int link_request_set_neighbors(Link *link) {
1029 Neighbor *neighbor;
1030 int r;
1031
1032 assert(link);
1033 assert(link->network);
1034 assert(link->state != _LINK_STATE_INVALID);
1035
1036 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 1037 link->neighbors_configured = false;
e4a71bf3
WKI		 1038
1039 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
1040 r = neighbor_configure(neighbor, link, NULL);
1041 if (r < 0) {
1042 log_link_warning_errno(link, r, "Could not set neighbor: %m");
1043 link_enter_failed(link);
1044 return r;
1045 }
1046 }
1047
1048 if (link->neighbor_messages == 0) {
1049 link->neighbors_configured = true;
1050 link_check_ready(link);
1051 } else
1052 log_link_debug(link, "Setting neighbors");
1053
1054 return 0;
1055}
1056
302a796f 1057static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1058 int r;
1059
4958aee4 1060 assert(rtnl);
f5be5601
TG		 1061 assert(m);
1062 assert(link);
1063 assert(link->ifname);
7715629e 1064 assert(link->address_messages > 0);
289e6774 1065 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1066 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1067
7715629e 1068 link->address_messages--;
f882c247 1069
5da8149f 1070 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1071 return 1;
1072
1c4baffc 1073 r = sd_netlink_message_get_errno(m);
c166a070 1074 if (r < 0 && r != -EEXIST)
a2fae7bb 1075 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 1076 else if (r >= 0)
200a0868 1077 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1078
7715629e 1079 if (link->address_messages == 0) {
6a7a4e4d 1080 log_link_debug(link, "Addresses set");
c42ff3a1 1081 link->addresses_configured = true;
6aa5773b 1082 link_check_ready(link);
dd3efc09 1083 }
f882c247
TG		 1084
1085 return 1;
1086}
1087
f6bb7ac5
TJ		 1088static int link_set_bridge_fdb(Link *link) {
1089 FdbEntry *fdb_entry;
197e2809 1090 int r;
f6bb7ac5
TJ		 1091
1092 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1093 r = fdb_entry_configure(link, fdb_entry);
197e2809 1094 if (r < 0)
f6bb7ac5 1095 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1096 }
1097
197e2809 1098 return 0;
f6bb7ac5
TJ		 1099}
1100
289e6774 1101static int link_request_set_addresses(Link *link) {
95b74ef6 1102 AddressLabel *label;
a6cc569e 1103 Address *ad;
f882c247
TG		 1104 int r;
1105
1106 assert(link);
1107 assert(link->network);
f5be5601 1108 assert(link->state != _LINK_STATE_INVALID);
f882c247 1109
2428613f
YW		 1110 link_set_state(link, LINK_STATE_CONFIGURING);
1111
1112 /* Reset all *_configured flags we are configuring. */
1113 link->addresses_configured = false;
6aa5773b 1114 link->addresses_ready = false;
2428613f
YW		 1115 link->neighbors_configured = false;
1116 link->static_routes_configured = false;
1117 link->routing_policy_rules_configured = false;
1118
f6bb7ac5
TJ		 1119 r = link_set_bridge_fdb(link);
1120 if (r < 0)
1121 return r;
1122
f3ef324d
YW		 1123 r = link_request_set_neighbors(link);
1124 if (r < 0)
1125 return r;
e4a71bf3 1126
3d3d4255 1127 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1128 bool update;
1129
1130 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1131
1132 r = address_configure(ad, link, address_handler, update);
dd3efc09 1133 if (r < 0) {
5a8bcb67 1134 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1135 link_enter_failed(link);
95b74ef6
SS		 1136 return r;
1137 }
54a1a535
YW		 1138 if (r > 0)
1139 link->address_messages++;
95b74ef6
SS		 1140 }
1141
1142 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1143 r = address_label_configure(label, link, NULL, false);
95b74ef6
SS		 1144 if (r < 0) {
1145 log_link_warning_errno(link, r, "Could not set address label: %m");
1146 link_enter_failed(link);
f5be5601
TG		 1147 return r;
1148 }
1149
7715629e 1150 link->address_label_messages++;
f882c247
TG		 1151 }
1152
d4cdbea5
TG		 1153 /* now that we can figure out a default address for the dhcp server,
1154 start it */
708c425d 1155 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
8fcf1d61
YW		 1156 r = dhcp4_server_configure(link);
1157 if (r < 0) {
d4cdbea5 1158 link_enter_failed(link);
d4cdbea5 1159 return r;
586ac6f7 1160 }
6a7a4e4d 1161 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1162 }
1163
c42ff3a1
WKI		 1164 if (link->address_messages == 0) {
1165 link->addresses_configured = true;
6aa5773b 1166 link_check_ready(link);
c42ff3a1 1167 } else
6a7a4e4d 1168 log_link_debug(link, "Setting addresses");
431ca2ce 1169
f882c247
TG		 1170 return 0;
1171}
1172
13b498f9 1173static int link_set_bridge_vlan(Link *link) {
86e2be7b 1174 int r;
13b498f9
TJ		 1175
1176 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1177 if (r < 0)
1178 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1179
1180 return r;
1181}
1182
a60a720c 1183static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1184 int r;
1185
1186 if (!link_proxy_arp_enabled(link))
1187 return 0;
1188
62e021a9 1189 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1190 if (r < 0)
1191 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1192
1193 return 0;
1194}
1195
55dc8c4a
YW		 1196static int link_configure_after_setting_mtu(Link *link);
1197
302a796f 1198static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1199 int r;
1200
1201 assert(m);
1202 assert(link);
1203 assert(link->ifname);
1204
55dc8c4a
YW		 1205 link->setting_mtu = false;
1206
5da8149f 1207 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1208 return 1;
1209
1c4baffc 1210 r = sd_netlink_message_get_errno(m);
55dc8c4a 1211 if (r < 0) {
a2fae7bb 1212 log_link_warning_errno(link, r, "Could not set MTU: %m");
55dc8c4a
YW		 1213 return 1;
1214 }
1215
1216 log_link_debug(link, "Setting MTU done.");
1217
bd08ce56 1218 if (link->state == LINK_STATE_INITIALIZED)
55dc8c4a 1219 (void) link_configure_after_setting_mtu(link);
4f882b2a
TG		 1220
1221 return 1;
1222}
1223
933c70a0 1224int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1225 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1226 int r;
1227
1228 assert(link);
1229 assert(link->manager);
1230 assert(link->manager->rtnl);
1231
40288ece
YW		 1232 if (mtu == 0 || link->setting_mtu)
1233 return 0;
1234
933c70a0 1235 if (link->mtu == mtu)
ee493106
YW		 1236 return 0;
1237
6a7a4e4d 1238 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1239
6a7a4e4d
LP		 1240 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1241 if (r < 0)
1242 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1243
44b598a1 1244 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
b102cdca 1245 * for this interface, then disable IPv6 else enable it. */
44b598a1
SS		 1246 (void) link_enable_ipv6(link);
1247
1248 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1249 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1250 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1251
1252 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1253 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1254
72c2500b 1255 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1256 }
1257
1c4baffc 1258 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1259 if (r < 0)
1260 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1261
302a796f
YW		 1262 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1263 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1264 if (r < 0)
1265 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1266
ae941762 1267 link_ref(link);
1046bf9b 1268 link->setting_mtu = true;
b226d99b 1269
4f882b2a
TG		 1270 return 0;
1271}
1272
f6fcc1c2
YW		 1273static bool link_reduces_vlan_mtu(Link *link) {
1274 /* See netif_reduces_vlan_mtu() in kernel. */
1275 return streq_ptr(link->kind, "macsec");
1276}
1277
1278static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1279 uint32_t mtu = 0;
1280 NetDev *dev;
1281 Iterator i;
1282
1283 HASHMAP_FOREACH(dev, link->network->stacked_netdevs, i)
1284 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1285 /* See vlan_dev_change_mtu() in kernel. */
1286 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1287
1288 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1289 /* See macvlan_change_mtu() in kernel. */
1290 mtu = dev->mtu;
1291
1292 return mtu;
1293}
1294
1295static int link_configure_mtu(Link *link) {
1296 uint32_t mtu;
1297
1298 assert(link);
1299 assert(link->network);
1300
1301 if (link->network->mtu > 0)
1302 return link_set_mtu(link, link->network->mtu);
1303
1304 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1305 if (link->mtu >= mtu)
1306 return 0;
1307
1308 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1309 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1310 link->mtu, mtu);
1311
1312 return link_set_mtu(link, mtu);
1313}
1314
302a796f 1315static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1316 int r;
1317
1318 assert(m);
1319 assert(link);
1320 assert(link->ifname);
1321
1322 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1323 return 1;
1324
1325 r = sd_netlink_message_get_errno(m);
1326 if (r < 0)
1327 log_link_warning_errno(link, r, "Could not set link flags: %m");
1328
1329 return 1;
1330}
1331
1332static int link_set_flags(Link *link) {
1333 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1334 unsigned ifi_change = 0;
1335 unsigned ifi_flags = 0;
1336 int r;
1337
1338 assert(link);
1339 assert(link->manager);
1340 assert(link->manager->rtnl);
1341
1342 if (link->flags & IFF_LOOPBACK)
1343 return 0;
1344
1345 if (!link->network)
1346 return 0;
1347
866e6b7a 1348 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1349 return 0;
1350
1351 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1352 if (r < 0)
1353 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1354
1355 if (link->network->arp >= 0) {
1356 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1357 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1358 }
1359
1360 if (link->network->multicast >= 0) {
1361 ifi_change |= IFF_MULTICAST;
1362 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1363 }
1364
866e6b7a
SS		 1365 if (link->network->allmulticast >= 0) {
1366 ifi_change |= IFF_ALLMULTI;
1367 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1368 }
1369
99d2baa2
SS		 1370 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1371 if (r < 0)
1372 return log_link_error_errno(link, r, "Could not set link flags: %m");
1373
302a796f
YW		 1374 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1375 link_netlink_destroy_callback, link);
99d2baa2
SS		 1376 if (r < 0)
1377 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1378
1379 link_ref(link);
1380
1381 return 0;
1382}
1383
e7ab854c
TG		 1384static int link_acquire_ipv6_conf(Link *link) {
1385 int r;
1386
1387 assert(link);
1388
e7ab854c 1389 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1390 assert(link->ndisc);
e7ab854c
TG		 1391
1392 log_link_debug(link, "Discovering IPv6 routers");
1393
1e7a0e21 1394 r = sd_ndisc_start(link->ndisc);
63348d13 1395 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1396 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1397 }
1398
7465dd22
PF		 1399 if (link_radv_enabled(link)) {
1400 assert(link->radv);
1401 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1402
1403 log_link_debug(link, "Starting IPv6 Router Advertisements");
1404
1405 r = sd_radv_start(link->radv);
1406 if (r < 0 && r != -EBUSY)
1407 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1408 }
1409
10752343
PF		 1410 (void) dhcp6_request_prefix_delegation(link);
1411
e7ab854c
TG		 1412 return 0;
1413}
1414
6fc25497 1415static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1416 int r;
1417
1418 assert(link);
ff254138
TG		 1419 assert(link->manager);
1420 assert(link->manager->event);
1421
910feb78 1422 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1423 assert(link->ipv4ll);
ff254138 1424
6a7a4e4d 1425 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1426
1427 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1428 if (r < 0)
1429 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1430 }
1431
78c958f8 1432 if (link_dhcp4_enabled(link)) {
eb34d4af 1433 assert(link->dhcp_client);
ff254138 1434
6a7a4e4d 1435 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1436
5c1d3fc9 1437 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1438 if (r < 0)
1439 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1440 }
ff254138 1441
6fc25497
SS		 1442 return 0;
1443}
1444
1445static int link_acquire_conf(Link *link) {
1446 int r;
1447
1448 assert(link);
1449
1450 r = link_acquire_ipv4_conf(link);
1451 if (r < 0)
1452 return r;
1453
3f7cc080 1454 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1455 r = link_acquire_ipv6_conf(link);
1456 if (r < 0)
1457 return r;
1458 }
1459
7272b25e
LP		 1460 if (link_lldp_emit_enabled(link)) {
1461 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1462 if (r < 0)
1463 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1464 }
1465
ff254138
TG		 1466 return 0;
1467}
1468
a61bb41c 1469bool link_has_carrier(Link *link) {
deb2e523
TG		 1470 /* see Documentation/networking/operstates.txt in the kernel sources */
1471
a61bb41c 1472 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1473 return true;
1474
a61bb41c 1475 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1476 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1477 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1478 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1479 return true;
1480
1481 return false;
1482}
1483
0e2fdb83
SS		 1484static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1485 int r;
1486
1487 assert(link);
1488
1489 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1490 return 1;
1491
1492 r = sd_netlink_message_get_errno(m);
1493 if (r < 0)
1494 log_link_warning_errno(link, r, "Could not set address genmode for interface: %m");
1495
1496 return 1;
1497}
1498
1499static int link_configure_addrgen_mode(Link *link) {
1500 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1501 uint8_t ipv6ll_mode;
1502 int r;
1503
1504 assert(link);
1505 assert(link->network);
1506 assert(link->manager);
1507 assert(link->manager->rtnl);
1508
9f6e82e6
YW		 1509 if (!socket_ipv6_is_supported())
1510 return 0;
1511
0e2fdb83
SS		 1512 log_link_debug(link, "Setting address genmode for link");
1513
1514 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1515 if (r < 0)
1516 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1517
1518 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1519 if (r < 0)
1520 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1521
1522 r = sd_netlink_message_open_container(req, AF_INET6);
1523 if (r < 0)
1524 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1525
1526 if (!link_ipv6ll_enabled(link))
1527 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
826a3602 1528 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
0e2fdb83 1529 /* The file may not exist. And event if it exists, when stable_secret is unset,
826a3602
YW		 1530 * reading the file fails with EIO. */
1531 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1532 else
1533 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
0e2fdb83
SS		 1534
1535 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1536 if (r < 0)
1537 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1538
1539 r = sd_netlink_message_close_container(req);
1540 if (r < 0)
1541 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1542
1543 r = sd_netlink_message_close_container(req);
1544 if (r < 0)
1545 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1546
1547 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1548 link_netlink_destroy_callback, link);
1549 if (r < 0)
1550 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1551
1552 link_ref(link);
1553
1554 return 0;
1555}
1556
302a796f 1557static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1558 int r;
1559
1746cf2a
TG		 1560 assert(link);
1561
5da8149f 1562 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1563 return 1;
1564
1c4baffc 1565 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1566 if (r < 0)
26d6b214 1567 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 1568 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1569
f882c247
TG		 1570 return 1;
1571}
1572
1cc84f3b 1573static int link_up(Link *link) {
4afd3348 1574 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1575 int r;
1576
f882c247 1577 assert(link);
c106cc36 1578 assert(link->network);
f882c247
TG		 1579 assert(link->manager);
1580 assert(link->manager->rtnl);
1581
6a7a4e4d 1582 log_link_debug(link, "Bringing link up");
449f7554 1583
6a7a4e4d
LP		 1584 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1585 if (r < 0)
1586 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1587
2b2d8603 1588 /* set it free if not enslaved with networkd */
6cb955c6 1589 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1590 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1591 if (r < 0)
1592 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1593 }
1594
5d4795f3 1595 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1596 if (r < 0)
1597 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1598
c106cc36 1599 if (link->network->mac) {
1c4baffc 1600 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1601 if (r < 0)
1602 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1603 }
1604
302a796f
YW		 1605 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1606 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1607 if (r < 0)
1608 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1609
b226d99b
TG		 1610 link_ref(link);
1611
f882c247
TG		 1612 return 0;
1613}
1614
302a796f 1615static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1616 int r;
1617
1618 assert(link);
1619
1620 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1621 return 1;
1622
1c4baffc 1623 r = sd_netlink_message_get_errno(m);
0d4ad91d 1624 if (r < 0)
a2fae7bb 1625 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d
AR		 1626
1627 return 1;
1628}
1629
8e54db83 1630int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1631 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1632 int r;
1633
1634 assert(link);
1635 assert(link->manager);
1636 assert(link->manager->rtnl);
1637
6a7a4e4d 1638 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1639
1640 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1641 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1642 if (r < 0)
1643 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1644
1645 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1646 if (r < 0)
1647 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1648
8e54db83
YW		 1649 r = netlink_call_async(link->manager->rtnl, NULL, req,
1650 callback ?: link_down_handler,
302a796f 1651 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1652 if (r < 0)
1653 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1654
1655 link_ref(link);
1656
1657 return 0;
1658}
1659
1660static int link_handle_bound_to_list(Link *link) {
1661 Link *l;
1662 Iterator i;
1663 int r;
1664 bool required_up = false;
1665 bool link_is_up = false;
1666
1667 assert(link);
1668
1669 if (hashmap_isempty(link->bound_to_links))
1670 return 0;
1671
1672 if (link->flags & IFF_UP)
1673 link_is_up = true;
1674
1675 HASHMAP_FOREACH (l, link->bound_to_links, i)
1676 if (link_has_carrier(l)) {
1677 required_up = true;
1678 break;
1679 }
1680
1681 if (!required_up && link_is_up) {
8e54db83 1682 r = link_down(link, NULL);
0d4ad91d
AR		 1683 if (r < 0)
1684 return r;
1685 } else if (required_up && !link_is_up) {
1686 r = link_up(link);
1687 if (r < 0)
1688 return r;
1689 }
1690
1691 return 0;
1692}
1693
1694static int link_handle_bound_by_list(Link *link) {
1695 Iterator i;
1696 Link *l;
1697 int r;
1698
1699 assert(link);
1700
1701 if (hashmap_isempty(link->bound_by_links))
1702 return 0;
1703
1704 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1705 r = link_handle_bound_to_list(l);
1706 if (r < 0)
1707 return r;
1708 }
1709
1710 return 0;
1711}
1712
1713static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1714 int r;
1715
1716 assert(link);
1717 assert(carrier);
1718
1719 if (link == carrier)
1720 return 0;
1721
1722 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1723 return 0;
1724
1725 r = hashmap_ensure_allocated(h, NULL);
1726 if (r < 0)
1727 return r;
1728
1729 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1730 if (r < 0)
1731 return r;
1732
1733 return 0;
1734}
1735
1736static int link_new_bound_by_list(Link *link) {
1737 Manager *m;
1738 Link *carrier;
1739 Iterator i;
1740 int r;
1741 bool list_updated = false;
1742
1743 assert(link);
1744 assert(link->manager);
1745
1746 m = link->manager;
1747
b295beea 1748 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 1749 if (!carrier->network)
1750 continue;
1751
1752 if (strv_isempty(carrier->network->bind_carrier))
1753 continue;
1754
1755 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
1756 r = link_put_carrier(link, carrier, &link->bound_by_links);
1757 if (r < 0)
1758 return r;
1759
1760 list_updated = true;
1761 }
1762 }
1763
1764 if (list_updated)
84de38c5 1765 link_dirty(link);
0d4ad91d 1766
b295beea 1767 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 1768 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1769 if (r < 0)
1770 return r;
1771
84de38c5 1772 link_dirty(carrier);
0d4ad91d
AR		 1773 }
1774
1775 return 0;
1776}
1777
1778static int link_new_bound_to_list(Link *link) {
1779 Manager *m;
1780 Link *carrier;
1781 Iterator i;
1782 int r;
1783 bool list_updated = false;
1784
1785 assert(link);
1786 assert(link->manager);
1787
1788 if (!link->network)
1789 return 0;
1790
1791 if (strv_isempty(link->network->bind_carrier))
1792 return 0;
1793
1794 m = link->manager;
1795
1796 HASHMAP_FOREACH (carrier, m->links, i) {
1797 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
1798 r = link_put_carrier(link, carrier, &link->bound_to_links);
1799 if (r < 0)
1800 return r;
1801
1802 list_updated = true;
1803 }
1804 }
1805
1806 if (list_updated)
84de38c5 1807 link_dirty(link);
0d4ad91d
AR		 1808
1809 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
1810 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1811 if (r < 0)
1812 return r;
1813
84de38c5 1814 link_dirty(carrier);
0d4ad91d
AR		 1815 }
1816
1817 return 0;
1818}
1819
1820static int link_new_carrier_maps(Link *link) {
1821 int r;
1822
1823 r = link_new_bound_by_list(link);
1824 if (r < 0)
1825 return r;
1826
1827 r = link_handle_bound_by_list(link);
1828 if (r < 0)
1829 return r;
1830
1831 r = link_new_bound_to_list(link);
1832 if (r < 0)
1833 return r;
1834
1835 r = link_handle_bound_to_list(link);
1836 if (r < 0)
1837 return r;
1838
1839 return 0;
1840}
1841
1842static void link_free_bound_to_list(Link *link) {
1843 Link *bound_to;
1844 Iterator i;
1845
1846 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
1847 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
1848
1849 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 1850 link_dirty(bound_to);
0d4ad91d
AR		 1851 }
1852
1853 return;
1854}
1855
1856static void link_free_bound_by_list(Link *link) {
1857 Link *bound_by;
1858 Iterator i;
1859
1860 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
1861 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
1862
1863 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 1864 link_dirty(bound_by);
0d4ad91d
AR		 1865 link_handle_bound_to_list(bound_by);
1866 }
1867 }
1868
1869 return;
1870}
1871
1872static void link_free_carrier_maps(Link *link) {
1873 bool list_updated = false;
1874
1875 assert(link);
1876
1877 if (!hashmap_isempty(link->bound_to_links)) {
1878 link_free_bound_to_list(link);
1879 list_updated = true;
1880 }
1881
1882 if (!hashmap_isempty(link->bound_by_links)) {
1883 link_free_bound_by_list(link);
1884 list_updated = true;
1885 }
1886
1887 if (list_updated)
84de38c5 1888 link_dirty(link);
0d4ad91d
AR		 1889
1890 return;
1891}
1892
5f707e12
YW		 1893static int link_append_to_master(Link *link, NetDev *netdev) {
1894 Link *master;
1895 int r;
1896
1897 assert(link);
1898 assert(netdev);
1899
1900 r = link_get(link->manager, netdev->ifindex, &master);
1901 if (r < 0)
1902 return r;
1903
1904 r = set_ensure_allocated(&master->slaves, NULL);
1905 if (r < 0)
1906 return r;
1907
1908 r = set_put(master->slaves, link);
1909 if (r < 0)
1910 return r;
1911
1912 link_ref(link);
1913 return 0;
1914}
1915
1916static void link_drop_from_master(Link *link, NetDev *netdev) {
1917 Link *master;
1918
1919 assert(link);
1920
1921 if (!link->manager || !netdev)
1922 return;
1923
1924 if (link_get(link->manager, netdev->ifindex, &master) < 0)
1925 return;
1926
1927 link_unref(set_remove(master->slaves, link));
1928}
1929
1930static void link_detach_from_manager(Link *link) {
1931 if (!link || !link->manager)
1932 return;
1933
1934 link_unref(set_remove(link->manager->links_requesting_uuid, link));
1935 link_clean(link);
1936
1937 /* The following must be called at last. */
1938 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
1939 link_unref(link);
1940}
1941
0d4ad91d
AR		 1942void link_drop(Link *link) {
1943 if (!link || link->state == LINK_STATE_LINGER)
1944 return;
1945
1946 link_set_state(link, LINK_STATE_LINGER);
1947
1948 link_free_carrier_maps(link);
1949
5f707e12
YW		 1950 if (link->network) {
1951 link_drop_from_master(link, link->network->bridge);
1952 link_drop_from_master(link, link->network->bond);
1953 }
1954
6a7a4e4d 1955 log_link_debug(link, "Link removed");
0d4ad91d 1956
db2f8a2e 1957 (void) unlink(link->state_file);
c4397d94 1958 link_detach_from_manager(link);
0d4ad91d
AR		 1959}
1960
3f265037 1961static int link_joined(Link *link) {
f882c247
TG		 1962 int r;
1963
ef1ba606 1964 assert(link);
f5be5601 1965 assert(link->network);
dd3efc09 1966
0d4ad91d
AR		 1967 if (!hashmap_isempty(link->bound_to_links)) {
1968 r = link_handle_bound_to_list(link);
1969 if (r < 0)
1970 return r;
1971 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 1972 r = link_up(link);
1973 if (r < 0) {
1974 link_enter_failed(link);
1975 return r;
1976 }
ef1ba606 1977 }
f882c247 1978
9ed794a3 1979 if (link->network->bridge) {
e1853b00 1980 r = link_set_bridge(link);
6a7a4e4d
LP		 1981 if (r < 0)
1982 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 1983
1984 r = link_append_to_master(link, link->network->bridge);
1985 if (r < 0)
1986 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 1987 }
1988
eb64b435 1989 if (link->network->bond) {
7fcee284 1990 r = link_set_bond(link);
eb64b435
SS		 1991 if (r < 0)
1992 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 1993
45e11abf 1994 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 1995 if (r < 0)
1996 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 1997 }
1998
ffff9abe
TJ		 1999 if (link->network->use_br_vlan &&
2000 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2001 r = link_set_bridge_vlan(link);
2002 if (r < 0)
2003 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2004 }
2005
c1835a42
RM		 2006 /* Skip setting up addresses until it gets carrier,
2007 or it would try to set addresses twice,
2008 which is bad for non-idempotent steps. */
dad2d78e 2009 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2010 return 0;
2011
289e6774 2012 return link_request_set_addresses(link);
02b59d57
TG		 2013}
2014
302a796f 2015static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2016 int r;
2017
1746cf2a 2018 assert(link);
ef1ba606 2019 assert(link->network);
34bf3c00 2020 assert(link->enslaving > 0);
02b59d57 2021
313cefa1 2022 link->enslaving--;
52433f6b 2023
5da8149f 2024 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2025 return 1;
2026
1c4baffc 2027 r = sd_netlink_message_get_errno(m);
856f962c 2028 if (r < 0 && r != -EEXIST) {
a2fae7bb 2029 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2030 link_enter_failed(link);
2031 return 1;
ba179154 2032 } else
6a7a4e4d 2033 log_link_debug(link, "Joined netdev");
02b59d57 2034
34bf3c00 2035 if (link->enslaving == 0) {
3f265037 2036 link_joined(link);
34bf3c00 2037 }
02b59d57
TG		 2038
2039 return 1;
2040}
2041
3f265037 2042static int link_enter_join_netdev(Link *link) {
6a0a2f86 2043 NetDev *netdev;
672682a6 2044 Iterator i;
02b59d57
TG		 2045 int r;
2046
2047 assert(link);
2048 assert(link->network);
bd08ce56 2049 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2050
289e6774 2051 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2052
84de38c5 2053 link_dirty(link);
34bf3c00 2054 link->enslaving = 0;
02b59d57 2055
d9c67ea1 2056 if (link->network->bond) {
cbff7170
TJ		 2057 if (link->network->bond->state == NETDEV_STATE_READY &&
2058 link->network->bond->ifindex == link->master_ifindex)
2059 return link_joined(link);
2060
f2341e0a
LP		 2061 log_struct(LOG_DEBUG,
2062 LOG_LINK_INTERFACE(link),
2063 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2064 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2065
34bf3c00
YW		 2066 link->enslaving++;
2067
f2341e0a 2068 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2069 if (r < 0) {
f2341e0a
LP		 2070 log_struct_errno(LOG_WARNING, r,
2071 LOG_LINK_INTERFACE(link),
2072 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2073 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2074 link_enter_failed(link);
2075 return r;
2076 }
0ad6148e
MO		 2077 }
2078
d9c67ea1 2079 if (link->network->bridge) {
f2341e0a
LP		 2080 log_struct(LOG_DEBUG,
2081 LOG_LINK_INTERFACE(link),
2082 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2083 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2084
34bf3c00
YW		 2085 link->enslaving++;
2086
f2341e0a 2087 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2088 if (r < 0) {
f2341e0a
LP		 2089 log_struct_errno(LOG_WARNING, r,
2090 LOG_LINK_INTERFACE(link),
2091 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2092 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2093 link_enter_failed(link);
2094 return r;
2095 }
52433f6b
TG		 2096 }
2097
6cb955c6
AR		 2098 if (link->network->vrf) {
2099 log_struct(LOG_DEBUG,
2100 LOG_LINK_INTERFACE(link),
2101 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2102 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2103
34bf3c00
YW		 2104 link->enslaving++;
2105
6cb955c6
AR		 2106 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2107 if (r < 0) {
2108 log_struct_errno(LOG_WARNING, r,
2109 LOG_LINK_INTERFACE(link),
2110 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2111 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2112 link_enter_failed(link);
2113 return r;
2114 }
6cb955c6
AR		 2115 }
2116
6a0a2f86 2117 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2118
2b6db913
YW		 2119 if (netdev->ifindex > 0)
2120 /* Assume already enslaved. */
a63e5daa 2121 continue;
a63e5daa 2122
7033af49
YW		 2123 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2124 continue;
2125
f2341e0a
LP		 2126 log_struct(LOG_DEBUG,
2127 LOG_LINK_INTERFACE(link),
2128 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2129 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2130
34bf3c00
YW		 2131 link->enslaving++;
2132
f2341e0a 2133 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2134 if (r < 0) {
f2341e0a
LP		 2135 log_struct_errno(LOG_WARNING, r,
2136 LOG_LINK_INTERFACE(link),
2137 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2138 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2139 link_enter_failed(link);
2140 return r;
2141 }
326cb406
SS		 2142 }
2143
34bf3c00
YW		 2144 if (link->enslaving == 0)
2145 return link_joined(link);
2146
ef1ba606
TG		 2147 return 0;
2148}
2149
769d324c 2150static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2151 int r;
2152
765afd5c 2153 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2154 return 0;
2155
765afd5c
LP		 2156 /* We propagate the forwarding flag from one interface to the
2157 * global setting one way. This means: as long as at least one
2158 * interface was configured at any time that had IP forwarding
2159 * enabled the setting will stay on for good. We do this
2160 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2161 * somewhat in sync (see below). */
15dee3f0 2162
62e021a9 2163 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2164 if (r < 0)
765afd5c 2165 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2166
769d324c
LP		 2167 return 0;
2168}
2169
2170static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2171 int r;
2172
765afd5c 2173 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2174 return 0;
2175
61233823 2176 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2177 * packet forwarding setting: either packet forwarding is on
2178 * for all, or off for all. We hence don't bother with a
2179 * per-interface setting, but simply propagate the interface
2180 * flag, if it is set, to the global flag, one-way. Note that
2181 * while IPv4 would allow a per-interface flag, we expose the
2182 * same behaviour there and also propagate the setting from
2183 * one to all, to keep things simple (see above). */
15dee3f0 2184
62e021a9 2185 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2186 if (r < 0)
765afd5c 2187 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2188
2189 return 0;
2190}
2191
49092e22 2192static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2193 IPv6PrivacyExtensions s;
49092e22
SS		 2194 int r;
2195
1f0d9695 2196 s = link_ipv6_privacy_extensions(link);
66a6bd68 2197 if (s < 0)
49092e22
SS		 2198 return 0;
2199
62e021a9 2200 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2201 if (r < 0)
49092e22
SS		 2202 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2203
2204 return 0;
2205}
2206
4f2e437a 2207static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2208 int r;
2209
2210 /* Make this a NOP if IPv6 is not available */
2211 if (!socket_ipv6_is_supported())
2212 return 0;
2213
2214 if (link->flags & IFF_LOOPBACK)
2215 return 0;
2216
d68e2e59
LP		 2217 if (!link->network)
2218 return 0;
2219
62e021a9 2220 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2221 if (r < 0)
fe307276 2222 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2223
2224 return 0;
2225}
2226
8749cbcd 2227static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2228 int r;
2229
2230 /* Make this a NOP if IPv6 is not available */
2231 if (!socket_ipv6_is_supported())
2232 return 0;
2233
2234 if (link->flags & IFF_LOOPBACK)
2235 return 0;
2236
d68e2e59
LP		 2237 if (!link->network)
2238 return 0;
2239
8749cbcd
SS		 2240 if (link->network->ipv6_dad_transmits < 0)
2241 return 0;
2242
62e021a9 2243 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2244 if (r < 0)
8749cbcd 2245 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2246
2247 return 0;
2248}
2249
b69c3180 2250static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2251 int r;
2252
2253 /* Make this a NOP if IPv6 is not available */
2254 if (!socket_ipv6_is_supported())
2255 return 0;
2256
2257 if (link->flags & IFF_LOOPBACK)
2258 return 0;
2259
d68e2e59
LP		 2260 if (!link->network)
2261 return 0;
2262
b69c3180
SS		 2263 if (link->network->ipv6_hop_limit < 0)
2264 return 0;
2265
62e021a9 2266 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2267 if (r < 0)
b69c3180 2268 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2269
2270 return 0;
2271}
2272
11102cba 2273static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2274 int r;
2275
2276 /* Make this a NOP if IPv6 is not available */
2277 if (!socket_ipv6_is_supported())
2278 return 0;
2279
2280 if (link->flags & IFF_LOOPBACK)
2281 return 0;
2282
2283 if (link->network->ipv6_mtu == 0)
2284 return 0;
2285
62e021a9 2286 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
11102cba
SS		 2287 if (r < 0)
2288 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2289
2290 return 0;
2291}
2292
30226d27
TJ		 2293static bool link_is_static_address_configured(Link *link, Address *address) {
2294 Address *net_address;
2295
2296 assert(link);
2297 assert(address);
2298
2299 if (!link->network)
2300 return false;
2301
2302 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2303 if (address_equal(net_address, address))
2304 return true;
2305
2306 return false;
2307}
2308
7ecf0c3e
TJ		 2309static bool link_is_static_route_configured(Link *link, Route *route) {
2310 Route *net_route;
2311
2312 assert(link);
2313 assert(route);
2314
2315 if (!link->network)
2316 return false;
2317
2318 LIST_FOREACH(routes, net_route, link->network->static_routes)
2319 if (route_equal(net_route, route))
2320 return true;
2321
2322 return false;
2323}
2324
db51778f
YW		 2325static bool link_address_is_dynamic(Link *link, Address *address) {
2326 Route *route;
2327 Iterator i;
2328
2329 assert(link);
2330 assert(address);
2331
2332 if (address->cinfo.ifa_prefered != CACHE_INFO_INFINITY_LIFE_TIME)
2333 return true;
2334
2335 /* Even when the address is leased from a DHCP server, networkd assign the address
2336 * without lifetime when KeepConfiguration=dhcp. So, let's check that we have
2337 * corresponding routes with RTPROT_DHCP. */
2338 SET_FOREACH(route, link->routes_foreign, i) {
2339 if (route->protocol != RTPROT_DHCP)
2340 continue;
2341
2342 if (address->family != route->family)
2343 continue;
2344
2345 if (in_addr_equal(address->family, &address->in_addr, &route->prefsrc))
2346 return true;
2347 }
2348
2349 return false;
2350}
2351
5e5b137a
TG		 2352static int link_drop_foreign_config(Link *link) {
2353 Address *address;
2354 Route *route;
2355 Iterator i;
2356 int r;
2357
2358 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2359 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2360 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2361 continue;
2362
db51778f
YW		 2363 if (link_address_is_dynamic(link, address)) {
2364 if (FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2365 continue;
2366 } else if (FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2367 continue;
2368
30226d27
TJ		 2369 if (link_is_static_address_configured(link, address)) {
2370 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2371 if (r < 0)
2372 return log_link_error_errno(link, r, "Failed to add address: %m");
2373 } else {
63ae0569 2374 r = address_remove(address, link, NULL);
30226d27
TJ		 2375 if (r < 0)
2376 return r;
2377 }
5e5b137a
TG		 2378 }
2379
2380 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2381 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2382 if (route->protocol == RTPROT_KERNEL)
2383 continue;
2384
db51778f
YW		 2385 if (route->protocol == RTPROT_STATIC &&
2386 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2387 continue;
2388
2389 if (route->protocol == RTPROT_DHCP &&
2390 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2391 continue;
2392
7ecf0c3e
TJ		 2393 if (link_is_static_route_configured(link, route)) {
2394 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2395 if (r < 0)
2396 return r;
2397 } else {
4645ad47 2398 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2399 if (r < 0)
2400 return r;
2401 }
5e5b137a
TG		 2402 }
2403
2404 return 0;
2405}
2406
3104883d 2407static int link_drop_config(Link *link) {
410a7f15 2408 Address *address, *pool_address;
3104883d
SS		 2409 Route *route;
2410 Iterator i;
2411 int r;
2412
2413 SET_FOREACH(address, link->addresses, i) {
2414 /* we consider IPv6LL addresses to be managed by the kernel */
2415 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2416 continue;
2417
63ae0569 2418 r = address_remove(address, link, NULL);
3104883d
SS		 2419 if (r < 0)
2420 return r;
410a7f15
RM		 2421
2422 /* If this address came from an address pool, clean up the pool */
2423 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2424 if (address_equal(address, pool_address)) {
2425 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2426 address_free(pool_address);
2427 break;
2428 }
2429 }
3104883d
SS		 2430 }
2431
2432 SET_FOREACH(route, link->routes, i) {
2433 /* do not touch routes managed by the kernel */
2434 if (route->protocol == RTPROT_KERNEL)
2435 continue;
2436
4645ad47 2437 r = route_remove(route, link, NULL);
3104883d
SS		 2438 if (r < 0)
2439 return r;
2440 }
2441
c69305ff
LP		 2442 ndisc_flush(link);
2443
3104883d
SS		 2444 return 0;
2445}
2446
a748b692 2447static int link_configure(Link *link) {
02b59d57
TG		 2448 int r;
2449
ef1ba606 2450 assert(link);
b22d8a00 2451 assert(link->network);
bd08ce56 2452 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2453
cab042b8 2454 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
93ea7750 2455 return link_configure_can(link);
92c918b0 2456
02e28621
ДГ		 2457 /* Drop foreign config, but ignore loopback or critical devices.
2458 * We do not want to remove loopback address or addresses used for root NFS. */
7da377ef 2459 if (!(link->flags & IFF_LOOPBACK) &&
db51778f 2460 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
e5d44b34
CH		 2461 r = link_drop_foreign_config(link);
2462 if (r < 0)
2463 return r;
2464 }
5e5b137a 2465
23d8b221
SS		 2466 r = link_set_proxy_arp(link);
2467 if (r < 0)
2468 return r;
2469
a0e5c15d
FK		 2470 r = ipv6_proxy_ndp_addresses_configure(link);
2471 if (r < 0)
2472 return r;
2473
769d324c
LP		 2474 r = link_set_ipv4_forward(link);
2475 if (r < 0)
2476 return r;
2477
2478 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2479 if (r < 0)
2480 return r;
2481
49092e22
SS		 2482 r = link_set_ipv6_privacy_extensions(link);
2483 if (r < 0)
2484 return r;
2485
4f2e437a
SS		 2486 r = link_set_ipv6_accept_ra(link);
2487 if (r < 0)
2488 return r;
2489
8749cbcd
SS		 2490 r = link_set_ipv6_dad_transmits(link);
2491 if (r < 0)
2492 return r;
b69c3180
SS		 2493
2494 r = link_set_ipv6_hop_limit(link);
2495 if (r < 0)
2496 return r;
8749cbcd 2497
99d2baa2
SS		 2498 r = link_set_flags(link);
2499 if (r < 0)
2500 return r;
2501
11102cba
SS		 2502 r = link_set_ipv6_mtu(link);
2503 if (r < 0)
2504 return r;
2505
910feb78 2506 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
b22d8a00 2507 r = ipv4ll_configure(link);
eb34d4af
TG		 2508 if (r < 0)
2509 return r;
2510 }
2511
78c958f8 2512 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2513 r = dhcp4_set_promote_secondaries(link);
2514 if (r < 0)
2515 return r;
2516
3c9b8860 2517 r = dhcp4_configure(link);
eb34d4af
TG		 2518 if (r < 0)
2519 return r;
eb34d4af
TG		 2520 }
2521
78c958f8 2522 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2523 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2524 if (r < 0)
2525 return r;
2526
2527 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2528 if (r < 0)
2529 return r;
dd43110f
TG		 2530 }
2531
62379e88
TG		 2532 if (link_dhcp6_enabled(link) ||
2533 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2534 r = dhcp6_configure(link);
2535 if (r < 0)
2536 return r;
2537 }
2538
2539 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2540 r = ndisc_configure(link);
4138fb2c
PF		 2541 if (r < 0)
2542 return r;
2543 }
2544
7465dd22
PF		 2545 if (link_radv_enabled(link)) {
2546 r = radv_configure(link);
2547 if (r < 0)
2548 return r;
2549 }
2550
8e1ad1ea 2551 if (link_lldp_rx_enabled(link)) {
7f853950 2552 r = link_lldp_rx_configure(link);
273eec24
LP		 2553 if (r < 0)
2554 return r;
ce43e484
SS		 2555 }
2556
f6fcc1c2 2557 r = link_configure_mtu(link);
40288ece
YW		 2558 if (r < 0)
2559 return r;
44b598a1 2560
9f6e82e6
YW		 2561 r = link_configure_addrgen_mode(link);
2562 if (r < 0)
2563 return r;
0e2fdb83 2564
55dc8c4a
YW		 2565 return link_configure_after_setting_mtu(link);
2566}
2567
2568static int link_configure_after_setting_mtu(Link *link) {
2569 int r;
2570
2571 assert(link);
2572 assert(link->network);
bd08ce56 2573 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a
YW		 2574
2575 if (link->setting_mtu)
2576 return 0;
2577
dad2d78e 2578 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2579 r = link_acquire_conf(link);
2580 if (r < 0)
2581 return r;
cc544d5f 2582 }
1e9be60b 2583
3f265037 2584 return link_enter_join_netdev(link);
505f8da7
TG		 2585}
2586
27dfc982
YW		 2587static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2588 assert(duid);
2589
2590 if (duid->raw_data_len > 0)
2591 return 0;
2592
2593 if (duid->type != DUID_TYPE_UUID)
2594 return -EINVAL;
2595
2596 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2597 duid->raw_data_len = sizeof(sd_id128_t);
2598
2599 return 1;
2600}
2601
2602int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2603 Manager *manager = userdata;
2604 const sd_bus_error *e;
2605 const void *a;
2606 size_t sz;
2607 DUID *duid;
2608 Link *link;
2609 int r;
2610
2611 assert(m);
2612 assert(manager);
2613
2614 e = sd_bus_message_get_error(m);
2615 if (e) {
2616 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 2617 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 2618 e->message);
2619 goto configure;
2620 }
2621
2622 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2623 if (r < 0)
2624 goto configure;
2625
2626 if (sz != sizeof(sd_id128_t)) {
ab4dd984 2627 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 2628 goto configure;
2629 }
2630
2631 memcpy(&manager->product_uuid, a, sz);
2632 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2633 (void) duid_set_uuid(duid, manager->product_uuid);
2634
2635 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2636
2637configure:
2638 while ((link = set_steal_first(manager->links_requesting_uuid))) {
2639 r = link_configure(link);
2640 if (r < 0)
2641 log_link_error_errno(link, r, "Failed to configure link: %m");
2642 }
2643
2644 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
2645
2646 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2647 * even if the method fails. */
2648 manager->has_product_uuid = true;
2649
2650 return 1;
2651}
2652
2653static bool link_requires_uuid(Link *link) {
2654 const DUID *duid;
2655
2656 assert(link);
2657 assert(link->manager);
2658 assert(link->network);
2659
2660 duid = link_get_duid(link);
2661 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
2662 return false;
2663
2664 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
2665 return true;
2666
2667 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
2668 return true;
2669
2670 return false;
2671}
2672
2673static int link_configure_duid(Link *link) {
2674 Manager *m;
2675 DUID *duid;
2676 int r;
2677
2678 assert(link);
2679 assert(link->manager);
2680 assert(link->network);
2681
2682 m = link->manager;
2683 duid = link_get_duid(link);
2684
2685 if (!link_requires_uuid(link))
2686 return 1;
2687
2688 if (m->has_product_uuid) {
2689 (void) duid_set_uuid(duid, m->product_uuid);
2690 return 1;
2691 }
2692
2693 if (!m->links_requesting_uuid) {
2694 r = manager_request_product_uuid(m, link);
2695 if (r < 0) {
2696 if (r == -ENOMEM)
2697 return r;
2698
ab4dd984
ZJS		 2699 log_link_warning_errno(link, r,
2700 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 2701 return 1;
2702 }
2703 } else {
2704 r = set_put(m->links_requesting_uuid, link);
2705 if (r < 0)
2706 return log_oom();
2707
2708 r = set_put(m->duids_requesting_uuid, duid);
2709 if (r < 0)
2710 return log_oom();
2711 }
2712
2713 return 0;
2714}
2715
e6bf7774 2716static int link_initialized_and_synced(Link *link) {
505f8da7 2717 Network *network;
505f8da7
TG		 2718 int r;
2719
2720 assert(link);
2721 assert(link->ifname);
2722 assert(link->manager);
2723
bd08ce56
YW		 2724 /* We may get called either from the asynchronous netlink callback,
2725 * or directly for link_add() if running in a container. See link_add(). */
2726 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2727 return 0;
505f8da7 2728
6a7a4e4d 2729 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2730 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2731
0d4ad91d
AR		 2732 r = link_new_bound_by_list(link);
2733 if (r < 0)
2734 return r;
2735
2736 r = link_handle_bound_by_list(link);
2737 if (r < 0)
2738 return r;
2739
c4a03a56 2740 if (!link->network) {
51517f9e 2741 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 2742 &link->mac, &network);
2743 if (r == -ENOENT) {
2744 link_enter_unmanaged(link);
4232cf04 2745 return 0;
a09dc546
DM		 2746 } else if (r == 0 && network->unmanaged) {
2747 link_enter_unmanaged(link);
2748 return 0;
c4a03a56
TG		 2749 } else if (r < 0)
2750 return r;
505f8da7 2751
c4a03a56
TG		 2752 if (link->flags & IFF_LOOPBACK) {
2753 if (network->link_local != ADDRESS_FAMILY_NO)
2754 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2755
c4a03a56
TG		 2756 if (network->dhcp != ADDRESS_FAMILY_NO)
2757 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2758
c4a03a56
TG		 2759 if (network->dhcp_server)
2760 log_link_debug(link, "Ignoring DHCP server for loopback link");
2761 }
bd2efe92 2762
7d342c03 2763 r = network_apply(network, link);
c4a03a56
TG		 2764 if (r < 0)
2765 return r;
2766 }
505f8da7 2767
0d4ad91d
AR		 2768 r = link_new_bound_to_list(link);
2769 if (r < 0)
2770 return r;
2771
27dfc982
YW		 2772 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2773 * link_configure() is called later asynchronously. */
2774 r = link_configure_duid(link);
2775 if (r <= 0)
2776 return r;
2777
a748b692
TG		 2778 r = link_configure(link);
2779 if (r < 0)
2780 return r;
2781
4232cf04 2782 return 0;
505f8da7
TG		 2783}
2784
302a796f
YW		 2785static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2786 (void) link_initialized_and_synced(link);
e6bf7774
YW		 2787 return 1;
2788}
2789
51517f9e 2790int link_initialized(Link *link, sd_device *device) {
4afd3348 2791 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2792 int r;
2793
2794 assert(link);
2795 assert(link->manager);
2796 assert(link->manager->rtnl);
2797 assert(device);
2798
8434fd5c 2799 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2800 return 0;
2801
51517f9e 2802 if (link->sd_device)
679b3605
TG		 2803 return 0;
2804
79008bdd 2805 log_link_debug(link, "udev initialized link");
bd08ce56 2806 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 2807
51517f9e 2808 link->sd_device = sd_device_ref(device);
4f561e8e 2809
3c9b8860
TG		 2810 /* udev has initialized the link, but we don't know if we have yet
2811 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2812 * when it returns we know that the pending NEWLINKs have already been
2813 * processed and that we are up-to-date */
4f561e8e 2814
3c9b8860
TG		 2815 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2816 link->ifindex);
4f561e8e
TG		 2817 if (r < 0)
2818 return r;
2819
302a796f
YW		 2820 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
2821 link_netlink_destroy_callback, link);
4f561e8e
TG		 2822 if (r < 0)
2823 return r;
2824
5da8149f
TG		 2825 link_ref(link);
2826
4f561e8e
TG		 2827 return 0;
2828}
2829
c4a03a56 2830static int link_load(Link *link) {
0bc70f1d
TG		 2831 _cleanup_free_ char *network_file = NULL,
2832 *addresses = NULL,
f703cc2c 2833 *routes = NULL,
0bc70f1d
TG		 2834 *dhcp4_address = NULL,
2835 *ipv4ll_address = NULL;
2836 union in_addr_union address;
f703cc2c 2837 union in_addr_union route_dst;
c598ac76 2838 const char *p;
c4a03a56
TG		 2839 int r;
2840
2841 assert(link);
2842
aa8fbc74 2843 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 2844 "NETWORK_FILE", &network_file,
2845 "ADDRESSES", &addresses,
f703cc2c 2846 "ROUTES", &routes,
0bc70f1d 2847 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 2848 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 2849 if (r < 0 && r != -ENOENT)
2850 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
2851
2852 if (network_file) {
2853 Network *network;
2854 char *suffix;
2855
2856 /* drop suffix */
2857 suffix = strrchr(network_file, '.');
2858 if (!suffix) {
2859 log_link_debug(link, "Failed to get network name from %s", network_file);
2860 goto network_file_fail;
2861 }
2862 *suffix = '\0';
2863
2864 r = network_get_by_name(link->manager, basename(network_file), &network);
2865 if (r < 0) {
2866 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
2867 goto network_file_fail;
2868 }
2869
7d342c03 2870 r = network_apply(network, link);
c4a03a56
TG		 2871 if (r < 0)
2872 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
2873 }
2874
2875network_file_fail:
2876
2877 if (addresses) {
c598ac76 2878 p = addresses;
c4a03a56 2879
c598ac76
TG		 2880 for (;;) {
2881 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 2882 char *prefixlen_str;
2883 int family;
2884 unsigned char prefixlen;
c4a03a56 2885
c598ac76
TG		 2886 r = extract_first_word(&p, &address_str, NULL, 0);
2887 if (r < 0) {
2888 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
2889 continue;
928bc597
TA		 2890 }
2891 if (r == 0)
c598ac76
TG		 2892 break;
2893
2894 prefixlen_str = strchr(address_str, '/');
c4a03a56 2895 if (!prefixlen_str) {
c598ac76 2896 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 2897 continue;
2898 }
2899
313cefa1 2900 *prefixlen_str++ = '\0';
c4a03a56
TG		 2901
2902 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
2903 if (r != 1) {
2904 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
2905 continue;
2906 }
2907
c598ac76 2908 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 2909 if (r < 0) {
c598ac76 2910 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 2911 continue;
2912 }
2913
2914 r = address_add(link, family, &address, prefixlen, NULL);
2915 if (r < 0)
2916 return log_link_error_errno(link, r, "Failed to add address: %m");
2917 }
2918 }
2919
f703cc2c 2920 if (routes) {
74544b4e
TA		 2921 p = routes;
2922
c598ac76 2923 for (;;) {
f833694d 2924 Route *route;
c598ac76 2925 _cleanup_free_ char *route_str = NULL;
4afd3348 2926 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 2927 usec_t lifetime;
f703cc2c
TG		 2928 char *prefixlen_str;
2929 int family;
2930 unsigned char prefixlen, tos, table;
2931 uint32_t priority;
2932
c598ac76
TG		 2933 r = extract_first_word(&p, &route_str, NULL, 0);
2934 if (r < 0) {
2935 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
2936 continue;
928bc597
TA		 2937 }
2938 if (r == 0)
c598ac76
TG		 2939 break;
2940
2941 prefixlen_str = strchr(route_str, '/');
f703cc2c 2942 if (!prefixlen_str) {
c598ac76 2943 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 2944 continue;
2945 }
2946
313cefa1 2947 *prefixlen_str++ = '\0';
f703cc2c 2948
f833694d
TG		 2949 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
2950 if (r != 5) {
2951 log_link_debug(link,
2952 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
2953 prefixlen_str);
f703cc2c
TG		 2954 continue;
2955 }
2956
c598ac76 2957 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 2958 if (r < 0) {
c598ac76 2959 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 2960 continue;
2961 }
2962
f833694d 2963 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 2964 if (r < 0)
2965 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 2966
f02ba163 2967 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 2968 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
2969 0, route_expire_handler, route);
2970 if (r < 0)
2971 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
2972 }
2973
2974 route->lifetime = lifetime;
2975 sd_event_source_unref(route->expire);
1cc6c93a 2976 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 2977 }
2978 }
2979
0bc70f1d
TG		 2980 if (dhcp4_address) {
2981 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
2982 if (r < 0) {
b68d26b8 2983 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 2984 goto dhcp4_address_fail;
2985 }
2986
b1c626f6 2987 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 2988 if (r < 0)
b68d26b8 2989 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 2990
2991 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
2992 if (r < 0)
b68d26b8 2993 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 2994 }
2995
2996dhcp4_address_fail:
2997
2998 if (ipv4ll_address) {
2999 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3000 if (r < 0) {
b68d26b8 3001 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3002 goto ipv4ll_address_fail;
3003 }
3004
3005 r = sd_ipv4ll_new(&link->ipv4ll);
3006 if (r < 0)
b68d26b8 3007 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3008
3009 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3010 if (r < 0)
b68d26b8 3011 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3012 }
3013
3014ipv4ll_address_fail:
3015
c4a03a56
TG		 3016 return 0;
3017}
3018
1c4baffc 3019int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3020 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3021 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3022 Link *link;
5a937ea2 3023 int r;
505f8da7
TG		 3024
3025 assert(m);
fbbeb65a 3026 assert(m->rtnl);
505f8da7
TG		 3027 assert(message);
3028 assert(ret);
3029
3030 r = link_new(m, message, ret);
3031 if (r < 0)
3032 return r;
3033
3034 link = *ret;
3035
6a7a4e4d 3036 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3037
c4a03a56
TG		 3038 r = link_load(link);
3039 if (r < 0)
3040 return r;
3041
75f86906 3042 if (detect_container() <= 0) {
505f8da7 3043 /* not in a container, udev will be around */
ae06ab10 3044 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3045 r = sd_device_new_from_device_id(&device, ifindex_str);
3046 if (r < 0) {
3047 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3048 goto failed;
3049 }
505f8da7 3050
5a937ea2 3051 r = sd_device_get_is_initialized(device);
51517f9e
YW		 3052 if (r < 0) {
3053 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3054 goto failed;
3055 }
5a937ea2 3056 if (r == 0) {
505f8da7 3057 /* not yet ready */
79008bdd 3058 log_link_debug(link, "link pending udev initialization...");
505f8da7 3059 return 0;
3c4cb064 3060 }
505f8da7 3061
299ad32d
YW		 3062 r = device_is_renaming(device);
3063 if (r < 0) {
3064 log_link_warning_errno(link, r, "Failed to determine the device is renamed or not: %m");
3065 goto failed;
3066 }
3067 if (r > 0) {
3068 log_link_debug(link, "Interface is under renaming, pending initialization.");
3069 return 0;
3070 }
3071
4f561e8e
TG		 3072 r = link_initialized(link, device);
3073 if (r < 0)
5c416fc4 3074 goto failed;
4f561e8e 3075 } else {
e6bf7774 3076 r = link_initialized_and_synced(link);
4f561e8e 3077 if (r < 0)
5c416fc4 3078 goto failed;
4f561e8e 3079 }
505f8da7 3080
a748b692 3081 return 0;
5c416fc4
TG		 3082failed:
3083 link_enter_failed(link);
3084 return r;
a748b692
TG		 3085}
3086
c601ebf7 3087int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3088 int r;
3089
3090 assert(link);
3091
3092 log_link_info(link, "Gained IPv6LL");
3093
c601ebf7 3094 link->ipv6ll_address = *address;
e7ab854c
TG		 3095 link_check_ready(link);
3096
b9ea3d2e 3097 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3098 r = link_acquire_ipv6_conf(link);
3099 if (r < 0) {
3100 link_enter_failed(link);
3101 return r;
3102 }
3103 }
3104
3105 return 0;
3106}
3107
9c0a72f9
TG		 3108static int link_carrier_gained(Link *link) {
3109 int r;
3110
3111 assert(link);
3112
b9ea3d2e 3113 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3114 r = link_acquire_conf(link);
3115 if (r < 0) {
3116 link_enter_failed(link);
3117 return r;
3118 }
6fc25497 3119
289e6774 3120 r = link_request_set_addresses(link);
6fc25497
SS		 3121 if (r < 0)
3122 return r;
9c0a72f9
TG		 3123 }
3124
0d4ad91d
AR		 3125 r = link_handle_bound_by_list(link);
3126 if (r < 0)
3127 return r;
3128
9c0a72f9
TG		 3129 return 0;
3130}
3131
3132static int link_carrier_lost(Link *link) {
3133 int r;
3134
3135 assert(link);
3136
25e992ba 3137 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3138 return 0;
3139
fbdb6605 3140 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3141 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3142 * configuration and stop the clients as well. */
97e7fb39
SS		 3143 if (link->setting_mtu)
3144 return 0;
3145
95355a28 3146 r = link_stop_clients(link, false);
9c0a72f9
TG		 3147 if (r < 0) {
3148 link_enter_failed(link);
3149 return r;
3150 }
3151
28464ae0
SS		 3152 if (link_dhcp4_server_enabled(link))
3153 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3154
3104883d
SS		 3155 r = link_drop_config(link);
3156 if (r < 0)
3157 return r;
3158
f258e948
MP		 3159 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3160 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3161 r = link_drop_foreign_config(link);
3162 if (r < 0)
3163 return r;
3164 }
3104883d 3165
0d4ad91d
AR		 3166 r = link_handle_bound_by_list(link);
3167 if (r < 0)
3168 return r;
3169
9c0a72f9
TG		 3170 return 0;
3171}
3172
3173int link_carrier_reset(Link *link) {
3174 int r;
3175
3176 assert(link);
3177
3178 if (link_has_carrier(link)) {
3179 r = link_carrier_lost(link);
3180 if (r < 0)
3181 return r;
3182
3183 r = link_carrier_gained(link);
3184 if (r < 0)
3185 return r;
3186
6a7a4e4d 3187 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3188 }
3189
3190 return 0;
3191}
3192
1c4baffc 3193int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3194 struct ether_addr mac;
ca4e095a 3195 const char *ifname;
afe7fd56 3196 uint32_t mtu;
a61bb41c 3197 bool had_carrier, carrier_gained, carrier_lost;
bb262ef0 3198 int old_master, r;
22936833 3199
dd3efc09 3200 assert(link);
b8941f74 3201 assert(link->ifname);
22936833
TG		 3202 assert(m);
3203
7619683b 3204 if (link->state == LINK_STATE_LINGER) {
5238e957 3205 log_link_info(link, "Link re-added");
289e6774 3206 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3207
3208 r = link_new_carrier_maps(link);
3209 if (r < 0)
3210 return r;
7619683b
TG		 3211 }
3212
1c4baffc 3213 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3214 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3215 Manager *manager = link->manager;
b8941f74 3216
30de2b89 3217 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3218
30de2b89
YW		 3219 link_drop(link);
3220 r = link_add(manager, m, &link);
3221 if (r < 0)
3222 return r;
b8941f74
TG		 3223 }
3224
1c4baffc 3225 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3226 if (r >= 0 && mtu > 0) {
3227 link->mtu = mtu;
4e964aa0 3228 if (link->original_mtu == 0) {
afe7fd56 3229 link->original_mtu = mtu;
6a7a4e4d 3230 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3231 }
3232
3233 if (link->dhcp_client) {
3c9b8860
TG		 3234 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3235 link->mtu);
fc95c359
YW		 3236 if (r < 0)
3237 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3238 }
7465dd22
PF		 3239
3240 if (link->radv) {
3241 r = sd_radv_set_mtu(link->radv, link->mtu);
3242 if (r < 0)
3243 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3244 }
9842de0d 3245 }
69629de9 3246
e9189a1f
TG		 3247 /* The kernel may broadcast NEWLINK messages without the MAC address
3248 set, simply ignore them. */
1c4baffc 3249 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3250 if (r >= 0) {
3c9b8860
TG		 3251 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3252 ETH_ALEN)) {
c49b33ac 3253
3c9b8860
TG		 3254 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3255 ETH_ALEN);
c49b33ac 3256
79008bdd 3257 log_link_debug(link, "MAC address: "
20861203
TG		 3258 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3259 mac.ether_addr_octet[0],
3260 mac.ether_addr_octet[1],
3261 mac.ether_addr_octet[2],
3262 mac.ether_addr_octet[3],
3263 mac.ether_addr_octet[4],
3264 mac.ether_addr_octet[5]);
c49b33ac 3265
20861203
TG		 3266 if (link->ipv4ll) {
3267 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3268 if (r < 0)
3269 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3270 }
c49b33ac 3271
20861203 3272 if (link->dhcp_client) {
3c9b8860 3273 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3274 (const uint8_t *) &link->mac,
3275 sizeof (link->mac),
3276 ARPHRD_ETHER);
6a7a4e4d
LP		 3277 if (r < 0)
3278 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3279
fff1f40c
YW		 3280 r = dhcp4_set_client_identifier(link);
3281 if (r < 0)
3282 return r;
c49b33ac 3283 }
4138fb2c
PF		 3284
3285 if (link->dhcp6_client) {
f24648a6 3286 const DUID* duid = link_get_duid(link);
8341a5c3 3287
4138fb2c 3288 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3289 (const uint8_t *) &link->mac,
3290 sizeof (link->mac),
3291 ARPHRD_ETHER);
6a7a4e4d
LP		 3292 if (r < 0)
3293 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3294
8217ed5e
TH		 3295 if (link->network->iaid_set) {
3296 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3297 link->network->iaid);
3298 if (r < 0)
3299 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3300 }
413708d1 3301
8341a5c3
ZJS		 3302 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3303 duid->type,
3304 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3305 duid->raw_data_len);
413708d1
VK		 3306 if (r < 0)
3307 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3308 }
7465dd22
PF		 3309
3310 if (link->radv) {
3311 r = sd_radv_set_mac(link->radv, &link->mac);
3312 if (r < 0)
3313 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3314 }
420d2058
SS		 3315
3316 if (link->ndisc) {
3317 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3318 if (r < 0)
3319 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3320 }
c49b33ac 3321 }
4f882b2a
TG		 3322 }
3323
bb262ef0
YW		 3324 old_master = link->master_ifindex;
3325 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
3326
a61bb41c
TG		 3327 had_carrier = link_has_carrier(link);
3328
bb262ef0 3329 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 3330 if (r < 0)
3331 return r;
3332
273eec24
LP		 3333 r = link_update_lldp(link);
3334 if (r < 0)
3335 return r;
3336
a61bb41c
TG		 3337 carrier_gained = !had_carrier && link_has_carrier(link);
3338 carrier_lost = had_carrier && !link_has_carrier(link);
3339
3340 if (carrier_gained) {
6a7a4e4d 3341 log_link_info(link, "Gained carrier");
a61bb41c 3342
9c0a72f9
TG		 3343 r = link_carrier_gained(link);
3344 if (r < 0)
3345 return r;
a61bb41c 3346 } else if (carrier_lost) {
6a7a4e4d 3347 log_link_info(link, "Lost carrier");
a61bb41c 3348
9c0a72f9
TG		 3349 r = link_carrier_lost(link);
3350 if (r < 0)
a61bb41c 3351 return r;
a61bb41c
TG		 3352 }
3353
3354 return 0;
dd3efc09 3355}
fe8db0c5 3356
b295beea
LP		 3357static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3358 bool space = false;
3359 Iterator i;
3360 Link *link;
3361
3362 assert(f);
3363 assert(prefix);
3364
3365 if (hashmap_isempty(h))
3366 return;
3367
0d536673 3368 fputs(prefix, f);
b295beea
LP		 3369 HASHMAP_FOREACH(link, h, i) {
3370 if (space)
0d536673 3371 fputc(' ', f);
b295beea
LP		 3372
3373 fprintf(f, "%i", link->ifindex);
3374 space = true;
3375 }
3376
0d536673 3377 fputc('\n', f);
b295beea
LP		 3378}
3379
fe8db0c5 3380int link_save(Link *link) {
68a8723c 3381 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3382 _cleanup_fclose_ FILE *f = NULL;
ac999bf0 3383 const char *admin_state, *oper_state, *carrier_state, *address_state;
e7780c8d 3384 Address *a;
c1eb9872 3385 Route *route;
e7780c8d 3386 Iterator i;
fe8db0c5
TG		 3387 int r;
3388
3389 assert(link);
3390 assert(link->state_file);
68a8723c 3391 assert(link->lease_file);
bbf7c048
TG		 3392 assert(link->manager);
3393
370e9930 3394 if (link->state == LINK_STATE_LINGER) {
6990fb6b 3395 (void) unlink(link->state_file);
370e9930
TG		 3396 return 0;
3397 }
3398
34437b4f
LP		 3399 link_lldp_save(link);
3400
deb2e523
TG		 3401 admin_state = link_state_to_string(link->state);
3402 assert(admin_state);
3403
e375dcde
TG		 3404 oper_state = link_operstate_to_string(link->operstate);
3405 assert(oper_state);
deb2e523 3406
ac999bf0
YW		 3407 carrier_state = link_carrier_state_to_string(link->carrier_state);
3408 assert(carrier_state);
3409
3410 address_state = link_address_state_to_string(link->address_state);
3411 assert(address_state);
3412
fe8db0c5
TG		 3413 r = fopen_temporary(link->state_file, &f, &temp_path);
3414 if (r < 0)
6a7a4e4d 3415 goto fail;
fe8db0c5 3416
5512a963 3417 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3418
3419 fprintf(f,
3420 "# This is private data. Do not parse.\n"
deb2e523 3421 "ADMIN_STATE=%s\n"
ac999bf0
YW		 3422 "OPER_STATE=%s\n"
3423 "CARRIER_STATE=%s\n"
3424 "ADDRESS_STATE=%s\n",
3425 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 3426
bcb7a07e 3427 if (link->network) {
fe0e16db
YW		 3428 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
3429 const char *dhcp_domainname = NULL, *p;
07bdc70d 3430 sd_dhcp6_lease *dhcp6_lease = NULL;
5512a963 3431 unsigned j;
fe0e16db 3432 bool space;
07bdc70d 3433
c1a38904
MTL		 3434 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3435 yes_no(link->network->required_for_online));
3436
4ac77d63
YW		 3437 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s\n",
3438 strempty(link_operstate_to_string(link->network->required_operstate_for_online)));
3439
07bdc70d 3440 if (link->dhcp6_client) {
4058d339
TG		 3441 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3442 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3443 log_link_debug(link, "No DHCPv6 lease");
3444 }
b0e39c82 3445
adc5b2e2
TG		 3446 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3447
0d536673 3448 fputs("DNS=", f);
ea352b40 3449 space = false;
5512a963
LP		 3450
3451 for (j = 0; j < link->network->n_dns; j++) {
3452 _cleanup_free_ char *b = NULL;
3453
3454 r = in_addr_to_string(link->network->dns[j].family,
3455 &link->network->dns[j].address, &b);
3456 if (r < 0) {
3457 log_debug_errno(r, "Failed to format address, ignoring: %m");
3458 continue;
3459 }
3460
3461 if (space)
0d536673
LP		 3462 fputc(' ', f);
3463 fputs(b, f);
5512a963
LP		 3464 space = true;
3465 }
d5314fff 3466
27cb34f5 3467 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3468 link->dhcp_lease) {
3469 const struct in_addr *addresses;
3470
3471 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
072320ea
TH		 3472 if (r > 0)
3473 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3474 space = true;
07bdc70d
PF		 3475 }
3476
caa8ca42 3477 if (link->network->dhcp6_use_dns && dhcp6_lease) {
07bdc70d
PF		 3478 struct in6_addr *in6_addrs;
3479
3480 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3481 if (r > 0) {
3482 if (space)
0d536673 3483 fputc(' ', f);
07bdc70d 3484 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3485 space = true;
3486 }
3487 }
3488
3489 /* Make sure to flush out old entries before we use the NDISC data */
3490 ndisc_vacuum(link);
3491
b296797f 3492 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3493 NDiscRDNSS *dd;
3494
3495 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3496 if (space)
0d536673 3497 fputc(' ', f);
1e7a0e21
LP		 3498
3499 serialize_in6_addrs(f, &dd->address, 1);
3500 space = true;
b0e39c82
TG		 3501 }
3502 }
3503
0d536673 3504 fputc('\n', f);
b0e39c82 3505
0d536673 3506 fputs("NTP=", f);
ea352b40 3507 space = false;
3df9bec5 3508 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3509
27cb34f5 3510 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3511 link->dhcp_lease) {
3512 const struct in_addr *addresses;
3513
3514 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
072320ea
TH		 3515 if (r > 0)
3516 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3517 space = true;
07bdc70d
PF		 3518 }
3519
caa8ca42 3520 if (link->network->dhcp6_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3521 struct in6_addr *in6_addrs;
3522 char **hosts;
07bdc70d
PF		 3523
3524 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3525 &in6_addrs);
3526 if (r > 0) {
3527 if (space)
0d536673 3528 fputc(' ', f);
07bdc70d
PF		 3529 serialize_in6_addrs(f, in6_addrs, r);
3530 space = true;
3531 }
3532
3533 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3534 if (r > 0)
3535 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3536 }
3537
0d536673 3538 fputc('\n', f);
bd8f6538 3539
b2a81c0b 3540 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3541 if (link->dhcp_lease) {
b2a81c0b 3542 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3543 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3544 }
b2a81c0b
LP		 3545 if (dhcp6_lease)
3546 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3547 }
3548
fe0e16db
YW		 3549 fputs("DOMAINS=", f);
3550 space = false;
3551 ORDERED_SET_FOREACH(p, link->network->search_domains, i)
3552 fputs_with_space(f, p, NULL, &space);
07bdc70d 3553
1e7a0e21
LP		 3554 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3555 NDiscDNSSL *dd;
9b4d1882 3556
1e7a0e21
LP		 3557 if (dhcp_domainname)
3558 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3559 if (dhcp_domains)
3560 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3561 if (dhcp6_domains)
3562 fputstrv(f, dhcp6_domains, NULL, &space);
3563
3564 SET_FOREACH(dd, link->ndisc_dnssl, i)
3565 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3566 }
b2a81c0b 3567
0d536673 3568 fputc('\n', f);
6192b846 3569
fe0e16db
YW		 3570 fputs("ROUTE_DOMAINS=", f);
3571 space = false;
3572 ORDERED_SET_FOREACH(p, link->network->route_domains, i)
3573 fputs_with_space(f, p, NULL, &space);
b2a81c0b 3574
1e7a0e21
LP		 3575 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3576 NDiscDNSSL *dd;
b2a81c0b 3577
1e7a0e21
LP		 3578 if (dhcp_domainname)
3579 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3580 if (dhcp_domains)
3581 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3582 if (dhcp6_domains)
3583 fputstrv(f, dhcp6_domains, NULL, &space);
3584
3585 SET_FOREACH(dd, link->ndisc_dnssl, i)
3586 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3587 }
b2a81c0b 3588
0d536673 3589 fputc('\n', f);
67272d15 3590
3c9b8860 3591 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3592 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3593 fprintf(f, "MDNS=%s\n",
3594 resolve_support_to_string(link->network->mdns));
7ece6f58
LP		 3595 if (link->network->dns_default_route >= 0)
3596 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
e7780c8d 3597
c9299be2
IT		 3598 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3599 fprintf(f, "DNS_OVER_TLS=%s\n",
3600 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 3601
ad6c0475
LP		 3602 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3603 fprintf(f, "DNSSEC=%s\n",
3604 dnssec_mode_to_string(link->network->dnssec_mode));
3605
8a516214
LP		 3606 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3607 const char *n;
3608
0d536673 3609 fputs("DNSSEC_NTA=", f);
8a516214 3610 space = false;
d390f8ef
LP		 3611 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3612 fputs_with_space(f, n, NULL, &space);
0d536673 3613 fputc('\n', f);
8a516214
LP		 3614 }
3615
0d536673 3616 fputs("ADDRESSES=", f);
e7780c8d
TG		 3617 space = false;
3618 SET_FOREACH(a, link->addresses, i) {
3619 _cleanup_free_ char *address_str = NULL;
3620
3621 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3622 if (r < 0)
3623 goto fail;
3624
e7780c8d
TG		 3625 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3626 space = true;
3627 }
0d536673 3628 fputc('\n', f);
c1eb9872 3629
0d536673 3630 fputs("ROUTES=", f);
c1eb9872
TG		 3631 space = false;
3632 SET_FOREACH(route, link->routes, i) {
3633 _cleanup_free_ char *route_str = NULL;
3634
3635 r = in_addr_to_string(route->family, &route->dst, &route_str);
3636 if (r < 0)
3637 goto fail;
3638
ecc3f340
ZJS		 3639 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3640 space ? " " : "", route_str,
f833694d 3641 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3642 space = true;
3643 }
3644
0d536673 3645 fputc('\n', f);
bcb7a07e 3646 }
7374f9d8 3647
b295beea
LP		 3648 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3649 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3650
8eb9058d 3651 if (link->dhcp_lease) {
0bc70f1d 3652 struct in_addr address;
8eb9058d
LP		 3653 const char *tz = NULL;
3654
0bc70f1d
TG		 3655 assert(link->network);
3656
8eb9058d
LP		 3657 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3658 if (r >= 0)
3659 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3660
0bc70f1d
TG		 3661 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3662 if (r >= 0) {
0d536673 3663 fputs("DHCP4_ADDRESS=", f);
072320ea 3664 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3665 fputc('\n', f);
0bc70f1d 3666 }
d9876a52 3667
bd91b83e 3668 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3669 if (r < 0)
c2d6bd61 3670 goto fail;
fe8db0c5 3671
7374f9d8 3672 fprintf(f,
b0e39c82
TG		 3673 "DHCP_LEASE=%s\n",
3674 link->lease_file);
deb2e523 3675 } else
6990fb6b 3676 (void) unlink(link->lease_file);
fe8db0c5 3677
0bc70f1d
TG		 3678 if (link->ipv4ll) {
3679 struct in_addr address;
3680
3681 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3682 if (r >= 0) {
0d536673 3683 fputs("IPV4LL_ADDRESS=", f);
072320ea 3684 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3685 fputc('\n', f);
0bc70f1d
TG		 3686 }
3687 }
3688
c2d6bd61
LP		 3689 r = fflush_and_check(f);
3690 if (r < 0)
3691 goto fail;
fe8db0c5 3692
c2d6bd61 3693 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3694 r = -errno;
c2d6bd61 3695 goto fail;
fe8db0c5
TG		 3696 }
3697
c2d6bd61 3698 return 0;
dacd6cee 3699
c2d6bd61 3700fail:
6a7a4e4d 3701 (void) unlink(link->state_file);
6a7a4e4d
LP		 3702 if (temp_path)
3703 (void) unlink(temp_path);
3704
dacd6cee 3705 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3706}
3707
84de38c5
TG		 3708/* The serialized state in /run is no longer up-to-date. */
3709void link_dirty(Link *link) {
3710 int r;
3711
3712 assert(link);
3713
0c241a37
SS		 3714 /* mark manager dirty as link is dirty */
3715 manager_dirty(link->manager);
3716
84de38c5
TG		 3717 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
3718 if (r < 0)
3719 /* allocation errors are ignored */
3720 return;
3721
3722 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 3723 if (r <= 0)
3724 /* don't take another ref if the link was already dirty */
84de38c5
TG		 3725 return;
3726
3727 link_ref(link);
3728}
3729
3730/* The serialized state in /run is up-to-date */
3731void link_clean(Link *link) {
3732 assert(link);
3733 assert(link->manager);
3734
1046bf9b 3735 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 3736}
3737
fe8db0c5 3738static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3739 [LINK_STATE_PENDING] = "pending",
bd08ce56 3740 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 3741 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 3742 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3743 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3744 [LINK_STATE_FAILED] = "failed",
370e9930 3745 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3746};
3747
3748DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
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