Line data Source code
1 : /* SPDX-License-Identifier: LGPL-2.1+ */
2 :
3 : #include <netinet/in.h>
4 : #include <linux/if.h>
5 : #include <linux/if_arp.h>
6 : #include <unistd.h>
7 :
8 : #include "alloc-util.h"
9 : #include "bus-util.h"
10 : #include "dhcp-identifier.h"
11 : #include "dhcp-lease-internal.h"
12 : #include "env-file.h"
13 : #include "fd-util.h"
14 : #include "fileio.h"
15 : #include "missing_network.h"
16 : #include "netdev/bond.h"
17 : #include "netdev/bridge.h"
18 : #include "netdev/ipvlan.h"
19 : #include "netdev/vrf.h"
20 : #include "netlink-util.h"
21 : #include "network-internal.h"
22 : #include "networkd-can.h"
23 : #include "networkd-dhcp-server.h"
24 : #include "networkd-dhcp4.h"
25 : #include "networkd-dhcp6.h"
26 : #include "networkd-ipv4ll.h"
27 : #include "networkd-ipv6-proxy-ndp.h"
28 : #include "networkd-link-bus.h"
29 : #include "networkd-link.h"
30 : #include "networkd-lldp-tx.h"
31 : #include "networkd-manager.h"
32 : #include "networkd-ndisc.h"
33 : #include "networkd-neighbor.h"
34 : #include "networkd-radv.h"
35 : #include "networkd-routing-policy-rule.h"
36 : #include "set.h"
37 : #include "socket-util.h"
38 : #include "stdio-util.h"
39 : #include "string-table.h"
40 : #include "strv.h"
41 : #include "sysctl-util.h"
42 : #include "tmpfile-util.h"
43 : #include "udev-util.h"
44 : #include "util.h"
45 : #include "virt.h"
46 :
47 0 : uint32_t link_get_vrf_table(Link *link) {
48 0 : return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
49 : }
50 :
51 0 : uint32_t link_get_dhcp_route_table(Link *link) {
52 : /* When the interface is part of an VRF use the VRFs routing table, unless
53 : * another table is explicitly specified. */
54 0 : if (link->network->dhcp_route_table_set)
55 0 : return link->network->dhcp_route_table;
56 0 : return link_get_vrf_table(link);
57 : }
58 :
59 0 : uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
60 0 : if (link->network->ipv6_accept_ra_route_table_set)
61 0 : return link->network->ipv6_accept_ra_route_table;
62 0 : return link_get_vrf_table(link);
63 : }
64 :
65 0 : DUID* link_get_duid(Link *link) {
66 0 : if (link->network->duid.type != _DUID_TYPE_INVALID)
67 0 : return &link->network->duid;
68 : else
69 0 : return &link->manager->duid;
70 : }
71 :
72 0 : int link_sysctl_ipv6_enabled(Link *link) {
73 0 : _cleanup_free_ char *value = NULL;
74 : int r;
75 :
76 0 : assert(link);
77 0 : assert(link->ifname);
78 :
79 0 : if (link->sysctl_ipv6_enabled >= 0)
80 0 : return link->sysctl_ipv6_enabled;
81 :
82 0 : const char *ifname = link->ifname; /* work around bogus gcc warning */
83 0 : r = sysctl_read_ip_property(AF_INET6, ifname, "disable_ipv6", &value);
84 0 : if (r < 0)
85 0 : return log_link_warning_errno(link, r,
86 : "Failed to read net.ipv6.conf.%s.disable_ipv6 sysctl property: %m",
87 : ifname);
88 :
89 0 : link->sysctl_ipv6_enabled = value[0] == '0';
90 0 : return link->sysctl_ipv6_enabled;
91 : }
92 :
93 0 : static bool link_dhcp6_enabled(Link *link) {
94 0 : assert(link);
95 :
96 0 : if (!socket_ipv6_is_supported())
97 0 : return false;
98 :
99 0 : if (link->flags & IFF_LOOPBACK)
100 0 : return false;
101 :
102 0 : if (!link->network)
103 0 : return false;
104 :
105 0 : if (link->network->bond)
106 0 : return false;
107 :
108 0 : if (link->iftype == ARPHRD_CAN)
109 0 : return false;
110 :
111 0 : if (link_sysctl_ipv6_enabled(link) == 0)
112 0 : return false;
113 :
114 0 : return link->network->dhcp & ADDRESS_FAMILY_IPV6;
115 : }
116 :
117 0 : static bool link_dhcp4_enabled(Link *link) {
118 0 : assert(link);
119 :
120 0 : if (link->flags & IFF_LOOPBACK)
121 0 : return false;
122 :
123 0 : if (!link->network)
124 0 : return false;
125 :
126 0 : if (link->network->bond)
127 0 : return false;
128 :
129 0 : if (link->iftype == ARPHRD_CAN)
130 0 : return false;
131 :
132 0 : return link->network->dhcp & ADDRESS_FAMILY_IPV4;
133 : }
134 :
135 0 : static bool link_dhcp4_server_enabled(Link *link) {
136 0 : assert(link);
137 :
138 0 : if (link->flags & IFF_LOOPBACK)
139 0 : return false;
140 :
141 0 : if (!link->network)
142 0 : return false;
143 :
144 0 : if (link->network->bond)
145 0 : return false;
146 :
147 0 : if (link->iftype == ARPHRD_CAN)
148 0 : return false;
149 :
150 0 : return link->network->dhcp_server;
151 : }
152 :
153 0 : bool link_ipv4ll_enabled(Link *link, AddressFamily mask) {
154 0 : assert(link);
155 0 : assert((mask & ~(ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) == 0);
156 :
157 0 : if (link->flags & IFF_LOOPBACK)
158 0 : return false;
159 :
160 0 : if (!link->network)
161 0 : return false;
162 :
163 0 : if (link->iftype == ARPHRD_CAN)
164 0 : return false;
165 :
166 0 : if (STRPTR_IN_SET(link->kind,
167 : "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
168 : "vti6", "nlmon", "xfrm"))
169 0 : return false;
170 :
171 : /* L3 or L3S mode do not support ARP. */
172 0 : if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
173 0 : return false;
174 :
175 0 : if (link->network->bond)
176 0 : return false;
177 :
178 0 : return link->network->link_local & mask;
179 : }
180 :
181 0 : static bool link_ipv6ll_enabled(Link *link) {
182 0 : assert(link);
183 :
184 0 : if (!socket_ipv6_is_supported())
185 0 : return false;
186 :
187 0 : if (link->flags & IFF_LOOPBACK)
188 0 : return false;
189 :
190 0 : if (!link->network)
191 0 : return false;
192 :
193 0 : if (link->iftype == ARPHRD_CAN)
194 0 : return false;
195 :
196 0 : if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon"))
197 0 : return false;
198 :
199 0 : if (link->network->bond)
200 0 : return false;
201 :
202 0 : if (link_sysctl_ipv6_enabled(link) == 0)
203 0 : return false;
204 :
205 0 : return link->network->link_local & ADDRESS_FAMILY_IPV6;
206 : }
207 :
208 0 : static bool link_ipv6_enabled(Link *link) {
209 0 : assert(link);
210 :
211 0 : if (!socket_ipv6_is_supported())
212 0 : return false;
213 :
214 0 : if (link->network->bond)
215 0 : return false;
216 :
217 0 : if (link_sysctl_ipv6_enabled(link) == 0)
218 0 : return false;
219 :
220 0 : if (link->iftype == ARPHRD_CAN)
221 0 : return false;
222 :
223 : /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
224 0 : return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
225 : }
226 :
227 0 : static bool link_radv_enabled(Link *link) {
228 0 : assert(link);
229 :
230 0 : if (!link_ipv6ll_enabled(link))
231 0 : return false;
232 :
233 0 : return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
234 : }
235 :
236 0 : static bool link_ipv4_forward_enabled(Link *link) {
237 0 : assert(link);
238 :
239 0 : if (link->flags & IFF_LOOPBACK)
240 0 : return false;
241 :
242 0 : if (!link->network)
243 0 : return false;
244 :
245 0 : if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
246 0 : return false;
247 :
248 0 : return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
249 : }
250 :
251 0 : static bool link_ipv6_forward_enabled(Link *link) {
252 0 : assert(link);
253 :
254 0 : if (!socket_ipv6_is_supported())
255 0 : return false;
256 :
257 0 : if (link->flags & IFF_LOOPBACK)
258 0 : return false;
259 :
260 0 : if (!link->network)
261 0 : return false;
262 :
263 0 : if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
264 0 : return false;
265 :
266 0 : if (link_sysctl_ipv6_enabled(link) == 0)
267 0 : return false;
268 :
269 0 : return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
270 : }
271 :
272 0 : static bool link_proxy_arp_enabled(Link *link) {
273 0 : assert(link);
274 :
275 0 : if (link->flags & IFF_LOOPBACK)
276 0 : return false;
277 :
278 0 : if (!link->network)
279 0 : return false;
280 :
281 0 : if (link->network->proxy_arp < 0)
282 0 : return false;
283 :
284 0 : return true;
285 : }
286 :
287 0 : static bool link_ipv6_accept_ra_enabled(Link *link) {
288 0 : assert(link);
289 :
290 0 : if (!socket_ipv6_is_supported())
291 0 : return false;
292 :
293 0 : if (link->flags & IFF_LOOPBACK)
294 0 : return false;
295 :
296 0 : if (!link->network)
297 0 : return false;
298 :
299 0 : if (!link_ipv6ll_enabled(link))
300 0 : return false;
301 :
302 : /* If unset use system default (enabled if local forwarding is disabled.
303 : * disabled if local forwarding is enabled).
304 : * If set, ignore or enforce RA independent of local forwarding state.
305 : */
306 0 : if (link->network->ipv6_accept_ra < 0)
307 : /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
308 0 : return !link_ipv6_forward_enabled(link);
309 0 : else if (link->network->ipv6_accept_ra > 0)
310 : /* accept RA even if ip_forward is enabled */
311 0 : return true;
312 : else
313 : /* ignore RA */
314 0 : return false;
315 : }
316 :
317 0 : static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
318 0 : assert(link);
319 :
320 0 : if (!socket_ipv6_is_supported())
321 0 : return _IPV6_PRIVACY_EXTENSIONS_INVALID;
322 :
323 0 : if (link->flags & IFF_LOOPBACK)
324 0 : return _IPV6_PRIVACY_EXTENSIONS_INVALID;
325 :
326 0 : if (!link->network)
327 0 : return _IPV6_PRIVACY_EXTENSIONS_INVALID;
328 :
329 0 : return link->network->ipv6_privacy_extensions;
330 : }
331 :
332 0 : static int link_enable_ipv6(Link *link) {
333 : bool disabled;
334 : int r;
335 :
336 0 : if (link->flags & IFF_LOOPBACK)
337 0 : return 0;
338 :
339 0 : disabled = !link_ipv6_enabled(link);
340 :
341 0 : r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", disabled);
342 0 : if (r < 0)
343 0 : log_link_warning_errno(link, r, "Cannot %s IPv6: %m", enable_disable(!disabled));
344 : else
345 0 : log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
346 :
347 0 : return 0;
348 : }
349 :
350 3 : static bool link_is_enslaved(Link *link) {
351 3 : if (link->flags & IFF_SLAVE)
352 : /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
353 0 : return true;
354 :
355 3 : if (!link->network)
356 3 : return false;
357 :
358 0 : if (link->master_ifindex > 0 && link->network->bridge)
359 0 : return true;
360 :
361 : /* TODO: add conditions for other netdevs. */
362 :
363 0 : return false;
364 : }
365 :
366 0 : static void link_update_master_operstate(Link *link, NetDev *netdev) {
367 : Link *master;
368 :
369 0 : if (!netdev)
370 0 : return;
371 :
372 0 : if (link_get(link->manager, netdev->ifindex, &master) < 0)
373 0 : return;
374 :
375 0 : link_update_operstate(master, true);
376 : }
377 :
378 6 : void link_update_operstate(Link *link, bool also_update_master) {
379 : LinkOperationalState operstate;
380 : LinkCarrierState carrier_state;
381 : LinkAddressState address_state;
382 6 : _cleanup_strv_free_ char **p = NULL;
383 6 : uint8_t scope = RT_SCOPE_NOWHERE;
384 6 : bool changed = false;
385 : Address *address;
386 : Iterator i;
387 :
388 6 : assert(link);
389 :
390 6 : if (link->kernel_operstate == IF_OPER_DORMANT)
391 0 : carrier_state = LINK_CARRIER_STATE_DORMANT;
392 6 : else if (link_has_carrier(link)) {
393 3 : if (link_is_enslaved(link))
394 0 : carrier_state = LINK_CARRIER_STATE_ENSLAVED;
395 : else
396 3 : carrier_state = LINK_CARRIER_STATE_CARRIER;
397 3 : } else if (link->flags & IFF_UP)
398 2 : carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
399 : else
400 1 : carrier_state = LINK_CARRIER_STATE_OFF;
401 :
402 6 : if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
403 : Link *slave;
404 :
405 3 : SET_FOREACH(slave, link->slaves, i) {
406 0 : link_update_operstate(slave, false);
407 :
408 0 : if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
409 0 : carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
410 : }
411 : }
412 :
413 6 : SET_FOREACH(address, link->addresses, i) {
414 0 : if (!address_is_ready(address))
415 0 : continue;
416 :
417 0 : if (address->scope < scope)
418 0 : scope = address->scope;
419 : }
420 :
421 : /* for operstate we also take foreign addresses into account */
422 6 : SET_FOREACH(address, link->addresses_foreign, i) {
423 0 : if (!address_is_ready(address))
424 0 : continue;
425 :
426 0 : if (address->scope < scope)
427 0 : scope = address->scope;
428 : }
429 :
430 6 : if (scope < RT_SCOPE_SITE)
431 : /* universally accessible addresses found */
432 0 : address_state = LINK_ADDRESS_STATE_ROUTABLE;
433 6 : else if (scope < RT_SCOPE_HOST)
434 : /* only link or site local addresses found */
435 0 : address_state = LINK_ADDRESS_STATE_DEGRADED;
436 : else
437 : /* no useful addresses found */
438 6 : address_state = LINK_ADDRESS_STATE_OFF;
439 :
440 : /* Mapping of address and carrier state vs operational state
441 : * carrier state
442 : * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
443 : * ------------------------------------------------------------------------------
444 : * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
445 : * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
446 : * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
447 : */
448 :
449 6 : if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
450 6 : operstate = (LinkOperationalState) carrier_state;
451 0 : else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
452 0 : operstate = LINK_OPERSTATE_ROUTABLE;
453 0 : else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
454 0 : operstate = LINK_OPERSTATE_DEGRADED;
455 : else
456 0 : operstate = LINK_OPERSTATE_ENSLAVED;
457 :
458 6 : if (link->carrier_state != carrier_state) {
459 5 : link->carrier_state = carrier_state;
460 5 : changed = true;
461 5 : if (strv_extend(&p, "CarrierState") < 0)
462 0 : log_oom();
463 : }
464 :
465 6 : if (link->address_state != address_state) {
466 0 : link->address_state = address_state;
467 0 : changed = true;
468 0 : if (strv_extend(&p, "AddressState") < 0)
469 0 : log_oom();
470 : }
471 :
472 6 : if (link->operstate != operstate) {
473 5 : link->operstate = operstate;
474 5 : changed = true;
475 5 : if (strv_extend(&p, "OperationalState") < 0)
476 0 : log_oom();
477 : }
478 :
479 6 : if (p)
480 5 : link_send_changed_strv(link, p);
481 6 : if (changed)
482 5 : link_dirty(link);
483 :
484 6 : if (also_update_master && link->network) {
485 0 : link_update_master_operstate(link, link->network->bond);
486 0 : link_update_master_operstate(link, link->network->bridge);
487 : }
488 6 : }
489 :
490 : #define FLAG_STRING(string, flag, old, new) \
491 : (((old ^ new) & flag) \
492 : ? ((old & flag) ? (" -" string) : (" +" string)) \
493 : : "")
494 :
495 12 : static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
496 : unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
497 : uint8_t operstate;
498 : int r;
499 :
500 12 : assert(link);
501 :
502 12 : r = sd_rtnl_message_link_get_flags(m, &flags);
503 12 : if (r < 0)
504 0 : return log_link_warning_errno(link, r, "Could not get link flags: %m");
505 :
506 12 : r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
507 12 : if (r < 0)
508 : /* if we got a message without operstate, take it to mean
509 : the state was unchanged */
510 0 : operstate = link->kernel_operstate;
511 :
512 12 : if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
513 6 : return 0;
514 :
515 6 : if (link->flags != flags) {
516 6 : 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",
517 : FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
518 : FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
519 : FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
520 : FLAG_STRING("UP", IFF_UP, link->flags, flags),
521 : FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
522 : FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
523 : FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
524 : FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
525 : FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
526 : FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
527 : FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
528 : FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
529 : FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
530 : FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
531 : FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
532 : FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
533 : FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
534 : FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
535 : FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
536 :
537 6 : unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
538 : IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
539 : IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
540 : IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
541 : IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
542 : IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
543 6 : unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
544 6 : unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
545 :
546 : /* link flags are currently at most 18 bits, let's align to
547 : * printing 20 */
548 6 : if (unknown_flags_added)
549 0 : log_link_debug(link,
550 : "Unknown link flags gained: %#.5x (ignoring)",
551 : unknown_flags_added);
552 :
553 6 : if (unknown_flags_removed)
554 0 : log_link_debug(link,
555 : "Unknown link flags lost: %#.5x (ignoring)",
556 : unknown_flags_removed);
557 : }
558 :
559 6 : link->flags = flags;
560 6 : link->kernel_operstate = operstate;
561 :
562 6 : link_update_operstate(link, true);
563 :
564 6 : return 0;
565 : }
566 :
567 6 : static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
568 6 : _cleanup_(link_unrefp) Link *link = NULL;
569 : uint16_t type;
570 6 : const char *ifname, *kind = NULL;
571 : int r, ifindex;
572 : unsigned short iftype;
573 :
574 6 : assert(manager);
575 6 : assert(message);
576 6 : assert(ret);
577 :
578 : /* check for link kind */
579 6 : r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
580 6 : if (r == 0) {
581 3 : (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
582 3 : r = sd_netlink_message_exit_container(message);
583 3 : if (r < 0)
584 0 : return r;
585 : }
586 :
587 6 : r = sd_netlink_message_get_type(message, &type);
588 6 : if (r < 0)
589 0 : return r;
590 6 : else if (type != RTM_NEWLINK)
591 0 : return -EINVAL;
592 :
593 6 : r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
594 6 : if (r < 0)
595 0 : return r;
596 6 : else if (ifindex <= 0)
597 0 : return -EINVAL;
598 :
599 6 : r = sd_rtnl_message_link_get_type(message, &iftype);
600 6 : if (r < 0)
601 0 : return r;
602 :
603 6 : r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
604 6 : if (r < 0)
605 0 : return r;
606 :
607 6 : link = new(Link, 1);
608 6 : if (!link)
609 0 : return -ENOMEM;
610 :
611 6 : *link = (Link) {
612 : .n_ref = 1,
613 : .manager = manager,
614 : .state = LINK_STATE_PENDING,
615 : .ifindex = ifindex,
616 : .iftype = iftype,
617 : .sysctl_ipv6_enabled = -1,
618 :
619 : .n_dns = (unsigned) -1,
620 : .dns_default_route = -1,
621 : .llmnr = _RESOLVE_SUPPORT_INVALID,
622 : .mdns = _RESOLVE_SUPPORT_INVALID,
623 : .dnssec_mode = _DNSSEC_MODE_INVALID,
624 : .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
625 : };
626 :
627 6 : link->ifname = strdup(ifname);
628 6 : if (!link->ifname)
629 0 : return -ENOMEM;
630 :
631 6 : if (kind) {
632 3 : link->kind = strdup(kind);
633 3 : if (!link->kind)
634 0 : return -ENOMEM;
635 : }
636 :
637 6 : r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
638 6 : if (r < 0)
639 5 : log_link_debug_errno(link, r, "New device has no master, continuing without");
640 :
641 6 : r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
642 6 : if (r < 0)
643 1 : log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
644 :
645 6 : if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
646 0 : return -ENOMEM;
647 :
648 6 : if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
649 0 : return -ENOMEM;
650 :
651 6 : if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
652 0 : return -ENOMEM;
653 :
654 6 : r = hashmap_ensure_allocated(&manager->links, NULL);
655 6 : if (r < 0)
656 0 : return r;
657 :
658 6 : r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
659 6 : if (r < 0)
660 0 : return r;
661 :
662 6 : r = link_update_flags(link, message, false);
663 6 : if (r < 0)
664 0 : return r;
665 :
666 6 : *ret = TAKE_PTR(link);
667 :
668 6 : return 0;
669 : }
670 :
671 6 : void link_ntp_settings_clear(Link *link) {
672 6 : link->ntp = strv_free(link->ntp);
673 6 : }
674 :
675 6 : void link_dns_settings_clear(Link *link) {
676 6 : link->dns = mfree(link->dns);
677 6 : link->n_dns = (unsigned) -1;
678 :
679 6 : link->search_domains = ordered_set_free_free(link->search_domains);
680 6 : link->route_domains = ordered_set_free_free(link->route_domains);
681 :
682 6 : link->dns_default_route = -1;
683 6 : link->llmnr = _RESOLVE_SUPPORT_INVALID;
684 6 : link->mdns = _RESOLVE_SUPPORT_INVALID;
685 6 : link->dnssec_mode = _DNSSEC_MODE_INVALID;
686 6 : link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
687 :
688 6 : link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
689 6 : }
690 :
691 6 : static Link *link_free(Link *link) {
692 : Address *address;
693 :
694 6 : assert(link);
695 :
696 6 : link_ntp_settings_clear(link);
697 6 : link_dns_settings_clear(link);
698 :
699 6 : link->routes = set_free_with_destructor(link->routes, route_free);
700 6 : link->routes_foreign = set_free_with_destructor(link->routes_foreign, route_free);
701 :
702 6 : link->neighbors = set_free_with_destructor(link->neighbors, neighbor_free);
703 6 : link->neighbors_foreign = set_free_with_destructor(link->neighbors_foreign, neighbor_free);
704 :
705 6 : link->addresses = set_free_with_destructor(link->addresses, address_free);
706 6 : link->addresses_foreign = set_free_with_destructor(link->addresses_foreign, address_free);
707 :
708 6 : while ((address = link->pool_addresses)) {
709 0 : LIST_REMOVE(addresses, link->pool_addresses, address);
710 0 : address_free(address);
711 : }
712 :
713 6 : sd_dhcp_server_unref(link->dhcp_server);
714 6 : sd_dhcp_client_unref(link->dhcp_client);
715 6 : sd_dhcp_lease_unref(link->dhcp_lease);
716 6 : set_free(link->dhcp_routes);
717 :
718 6 : link_lldp_emit_stop(link);
719 :
720 6 : free(link->lease_file);
721 :
722 6 : sd_lldp_unref(link->lldp);
723 6 : free(link->lldp_file);
724 :
725 6 : ndisc_flush(link);
726 :
727 6 : sd_ipv4ll_unref(link->ipv4ll);
728 6 : sd_dhcp6_client_unref(link->dhcp6_client);
729 6 : sd_ndisc_unref(link->ndisc);
730 6 : sd_radv_unref(link->radv);
731 :
732 6 : free(link->ifname);
733 6 : free(link->kind);
734 :
735 6 : (void) unlink(link->state_file);
736 6 : free(link->state_file);
737 :
738 6 : sd_device_unref(link->sd_device);
739 :
740 6 : hashmap_free(link->bound_to_links);
741 6 : hashmap_free(link->bound_by_links);
742 :
743 6 : set_free_with_destructor(link->slaves, link_unref);
744 :
745 6 : network_unref(link->network);
746 :
747 6 : return mfree(link);
748 : }
749 :
750 28 : DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
751 :
752 6 : int link_get(Manager *m, int ifindex, Link **ret) {
753 : Link *link;
754 :
755 6 : assert(m);
756 6 : assert(ifindex);
757 6 : assert(ret);
758 :
759 6 : link = hashmap_get(m->links, INT_TO_PTR(ifindex));
760 6 : if (!link)
761 6 : return -ENODEV;
762 :
763 0 : *ret = link;
764 :
765 0 : return 0;
766 : }
767 :
768 6 : void link_set_state(Link *link, LinkState state) {
769 6 : assert(link);
770 :
771 6 : if (link->state == state)
772 0 : return;
773 :
774 6 : log_link_debug(link, "State changed: %s -> %s",
775 : link_state_to_string(link->state),
776 : link_state_to_string(state));
777 :
778 6 : link->state = state;
779 :
780 6 : link_send_changed(link, "AdministrativeState", NULL);
781 : }
782 :
783 0 : static void link_enter_unmanaged(Link *link) {
784 0 : assert(link);
785 :
786 0 : link_set_state(link, LINK_STATE_UNMANAGED);
787 :
788 0 : link_dirty(link);
789 0 : }
790 :
791 6 : int link_stop_clients(Link *link, bool may_keep_dhcp) {
792 6 : int r = 0, k;
793 :
794 6 : assert(link);
795 6 : assert(link->manager);
796 6 : assert(link->manager->event);
797 :
798 6 : dhcp4_release_old_lease(link);
799 :
800 6 : if (link->dhcp_client && (!may_keep_dhcp || !link->network ||
801 0 : !FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP))) {
802 0 : k = sd_dhcp_client_stop(link->dhcp_client);
803 0 : if (k < 0)
804 0 : r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
805 : }
806 :
807 6 : if (link->ipv4ll) {
808 0 : k = sd_ipv4ll_stop(link->ipv4ll);
809 0 : if (k < 0)
810 0 : r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
811 : }
812 :
813 6 : if (link->dhcp6_client) {
814 0 : k = sd_dhcp6_client_stop(link->dhcp6_client);
815 0 : if (k < 0)
816 0 : r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
817 : }
818 :
819 6 : if (link->ndisc) {
820 0 : k = sd_ndisc_stop(link->ndisc);
821 0 : if (k < 0)
822 0 : r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
823 : }
824 :
825 6 : if (link->radv) {
826 0 : k = sd_radv_stop(link->radv);
827 0 : if (k < 0)
828 0 : r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
829 : }
830 :
831 6 : link_lldp_emit_stop(link);
832 6 : return r;
833 : }
834 :
835 0 : void link_enter_failed(Link *link) {
836 0 : assert(link);
837 :
838 0 : if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
839 0 : return;
840 :
841 0 : log_link_warning(link, "Failed");
842 :
843 0 : link_set_state(link, LINK_STATE_FAILED);
844 :
845 0 : link_stop_clients(link, false);
846 :
847 0 : link_dirty(link);
848 : }
849 :
850 0 : static int link_join_netdevs_after_configured(Link *link) {
851 : NetDev *netdev;
852 : Iterator i;
853 : int r;
854 :
855 0 : HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
856 0 : if (netdev->ifindex > 0)
857 : /* Assume already enslaved. */
858 0 : continue;
859 :
860 0 : if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
861 0 : continue;
862 :
863 0 : log_struct(LOG_DEBUG,
864 : LOG_LINK_INTERFACE(link),
865 : LOG_NETDEV_INTERFACE(netdev),
866 : LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
867 :
868 0 : r = netdev_join(netdev, link, NULL);
869 0 : if (r < 0)
870 0 : return log_struct_errno(LOG_WARNING, r,
871 : LOG_LINK_INTERFACE(link),
872 : LOG_NETDEV_INTERFACE(netdev),
873 : LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
874 : }
875 :
876 0 : return 0;
877 : }
878 :
879 0 : static void link_enter_configured(Link *link) {
880 0 : assert(link);
881 0 : assert(link->network);
882 :
883 0 : if (link->state != LINK_STATE_CONFIGURING)
884 0 : return;
885 :
886 0 : log_link_info(link, "Configured");
887 :
888 0 : link_set_state(link, LINK_STATE_CONFIGURED);
889 :
890 0 : (void) link_join_netdevs_after_configured(link);
891 :
892 0 : link_dirty(link);
893 : }
894 :
895 0 : static int link_request_set_routing_policy_rule(Link *link) {
896 0 : RoutingPolicyRule *rule, *rrule = NULL;
897 : int r;
898 :
899 0 : assert(link);
900 0 : assert(link->network);
901 :
902 0 : link->routing_policy_rules_configured = false;
903 :
904 0 : LIST_FOREACH(rules, rule, link->network->rules) {
905 0 : r = routing_policy_rule_get(link->manager, rule, &rrule);
906 0 : if (r >= 0) {
907 0 : if (r == 0)
908 0 : (void) routing_policy_rule_make_local(link->manager, rrule);
909 0 : continue;
910 : }
911 :
912 0 : r = routing_policy_rule_configure(rule, link, NULL);
913 0 : if (r < 0)
914 0 : return log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
915 0 : if (r > 0)
916 0 : link->routing_policy_rule_messages++;
917 : }
918 :
919 0 : routing_policy_rule_purge(link->manager, link);
920 0 : if (link->routing_policy_rule_messages == 0) {
921 0 : link->routing_policy_rules_configured = true;
922 0 : link_check_ready(link);
923 : } else {
924 0 : log_link_debug(link, "Setting routing policy rules");
925 0 : link_set_state(link, LINK_STATE_CONFIGURING);
926 : }
927 :
928 0 : return 0;
929 : }
930 :
931 0 : static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
932 : int r;
933 :
934 0 : assert(link);
935 0 : assert(link->route_messages > 0);
936 0 : assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
937 : LINK_STATE_FAILED, LINK_STATE_LINGER));
938 :
939 0 : link->route_messages--;
940 :
941 0 : if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
942 0 : return 1;
943 :
944 0 : r = sd_netlink_message_get_errno(m);
945 0 : if (r < 0 && r != -EEXIST) {
946 0 : log_link_warning_errno(link, r, "Could not set route: %m");
947 0 : link_enter_failed(link);
948 0 : return 1;
949 : }
950 :
951 0 : if (link->route_messages == 0) {
952 0 : log_link_debug(link, "Routes set");
953 0 : link->static_routes_configured = true;
954 0 : link_check_ready(link);
955 : }
956 :
957 0 : return 1;
958 : }
959 :
960 0 : int link_request_set_routes(Link *link) {
961 : enum {
962 : PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
963 : PHASE_GATEWAY, /* Second phase: Routes with a gateway */
964 : _PHASE_MAX
965 : } phase;
966 : Route *rt;
967 : int r;
968 :
969 0 : assert(link);
970 0 : assert(link->network);
971 0 : assert(link->addresses_configured);
972 0 : assert(link->address_messages == 0);
973 0 : assert(link->state != _LINK_STATE_INVALID);
974 :
975 0 : link->static_routes_configured = false;
976 :
977 0 : if (!link_has_carrier(link) && !link->network->configure_without_carrier)
978 : /* During configuring addresses, the link lost its carrier. As networkd is dropping
979 : * the addresses now, let's not configure the routes either. */
980 0 : return 0;
981 :
982 0 : r = link_request_set_routing_policy_rule(link);
983 0 : if (r < 0)
984 0 : return r;
985 :
986 : /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
987 0 : for (phase = 0; phase < _PHASE_MAX; phase++)
988 0 : LIST_FOREACH(routes, rt, link->network->static_routes) {
989 :
990 0 : if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
991 0 : continue;
992 :
993 0 : r = route_configure(rt, link, route_handler);
994 0 : if (r < 0)
995 0 : return log_link_warning_errno(link, r, "Could not set routes: %m");
996 0 : if (r > 0)
997 0 : link->route_messages++;
998 : }
999 :
1000 0 : if (link->route_messages == 0) {
1001 0 : link->static_routes_configured = true;
1002 0 : link_check_ready(link);
1003 : } else {
1004 0 : log_link_debug(link, "Setting routes");
1005 0 : link_set_state(link, LINK_STATE_CONFIGURING);
1006 : }
1007 :
1008 0 : return 0;
1009 : }
1010 :
1011 0 : void link_check_ready(Link *link) {
1012 : Address *a;
1013 : Iterator i;
1014 : int r;
1015 :
1016 0 : assert(link);
1017 :
1018 0 : if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1019 0 : return;
1020 :
1021 0 : if (!link->network)
1022 0 : return;
1023 :
1024 0 : if (!link->addresses_configured)
1025 0 : return;
1026 :
1027 0 : if (!link->neighbors_configured)
1028 0 : return;
1029 :
1030 0 : SET_FOREACH(a, link->addresses, i)
1031 0 : if (!address_is_ready(a))
1032 0 : return;
1033 :
1034 0 : if (!link->addresses_ready) {
1035 0 : link->addresses_ready = true;
1036 0 : r = link_request_set_routes(link);
1037 0 : if (r < 0)
1038 0 : link_enter_failed(link);
1039 0 : return;
1040 : }
1041 :
1042 0 : if (!link->static_routes_configured)
1043 0 : return;
1044 :
1045 0 : if (!link->routing_policy_rules_configured)
1046 0 : return;
1047 :
1048 0 : if (link_has_carrier(link) || !link->network->configure_without_carrier) {
1049 :
1050 0 : if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !(link->ipv4ll_address && link->ipv4ll_route))
1051 0 : return;
1052 :
1053 0 : if (link_ipv6ll_enabled(link) &&
1054 0 : in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
1055 0 : return;
1056 :
1057 0 : if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
1058 0 : !link->dhcp4_configured &&
1059 0 : !link->dhcp6_configured &&
1060 0 : !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address && link->ipv4ll_route))
1061 : /* When DHCP is enabled, at least one protocol must provide an address, or
1062 : * an IPv4ll fallback address must be configured. */
1063 0 : return;
1064 :
1065 0 : if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
1066 0 : return;
1067 : }
1068 :
1069 0 : if (link->state != LINK_STATE_CONFIGURED)
1070 0 : link_enter_configured(link);
1071 :
1072 0 : return;
1073 : }
1074 :
1075 0 : static int link_request_set_neighbors(Link *link) {
1076 : Neighbor *neighbor;
1077 : int r;
1078 :
1079 0 : assert(link);
1080 0 : assert(link->network);
1081 0 : assert(link->state != _LINK_STATE_INVALID);
1082 :
1083 0 : link->neighbors_configured = false;
1084 :
1085 0 : LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
1086 0 : r = neighbor_configure(neighbor, link, NULL);
1087 0 : if (r < 0)
1088 0 : return log_link_warning_errno(link, r, "Could not set neighbor: %m");
1089 : }
1090 :
1091 0 : if (link->neighbor_messages == 0) {
1092 0 : link->neighbors_configured = true;
1093 0 : link_check_ready(link);
1094 : } else {
1095 0 : log_link_debug(link, "Setting neighbors");
1096 0 : link_set_state(link, LINK_STATE_CONFIGURING);
1097 : }
1098 :
1099 0 : return 0;
1100 : }
1101 :
1102 0 : static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1103 : int r;
1104 :
1105 0 : assert(rtnl);
1106 0 : assert(m);
1107 0 : assert(link);
1108 0 : assert(link->ifname);
1109 0 : assert(link->address_messages > 0);
1110 0 : assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
1111 : LINK_STATE_FAILED, LINK_STATE_LINGER));
1112 :
1113 0 : link->address_messages--;
1114 :
1115 0 : if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1116 0 : return 1;
1117 :
1118 0 : r = sd_netlink_message_get_errno(m);
1119 0 : if (r < 0 && r != -EEXIST) {
1120 0 : log_link_warning_errno(link, r, "could not set address: %m");
1121 0 : link_enter_failed(link);
1122 0 : return 1;
1123 0 : } else if (r >= 0)
1124 0 : (void) manager_rtnl_process_address(rtnl, m, link->manager);
1125 :
1126 0 : if (link->address_messages == 0) {
1127 0 : log_link_debug(link, "Addresses set");
1128 0 : link->addresses_configured = true;
1129 0 : link_check_ready(link);
1130 : }
1131 :
1132 0 : return 1;
1133 : }
1134 :
1135 0 : static int link_set_bridge_fdb(Link *link) {
1136 : FdbEntry *fdb_entry;
1137 : int r;
1138 :
1139 0 : LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1140 0 : r = fdb_entry_configure(link, fdb_entry);
1141 0 : if (r < 0)
1142 0 : return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
1143 : }
1144 :
1145 0 : return 0;
1146 : }
1147 :
1148 0 : static int link_request_set_addresses(Link *link) {
1149 : AddressLabel *label;
1150 : Address *ad;
1151 : int r;
1152 :
1153 0 : assert(link);
1154 0 : assert(link->network);
1155 0 : assert(link->state != _LINK_STATE_INVALID);
1156 :
1157 : /* Reset all *_configured flags we are configuring. */
1158 0 : link->addresses_configured = false;
1159 0 : link->addresses_ready = false;
1160 0 : link->neighbors_configured = false;
1161 0 : link->static_routes_configured = false;
1162 0 : link->routing_policy_rules_configured = false;
1163 :
1164 0 : r = link_set_bridge_fdb(link);
1165 0 : if (r < 0)
1166 0 : return r;
1167 :
1168 0 : r = link_request_set_neighbors(link);
1169 0 : if (r < 0)
1170 0 : return r;
1171 :
1172 0 : LIST_FOREACH(addresses, ad, link->network->static_addresses) {
1173 : bool update;
1174 :
1175 0 : update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1176 :
1177 0 : r = address_configure(ad, link, address_handler, update);
1178 0 : if (r < 0)
1179 0 : return log_link_warning_errno(link, r, "Could not set addresses: %m");
1180 0 : if (r > 0)
1181 0 : link->address_messages++;
1182 : }
1183 :
1184 0 : LIST_FOREACH(labels, label, link->network->address_labels) {
1185 0 : r = address_label_configure(label, link, NULL, false);
1186 0 : if (r < 0)
1187 0 : return log_link_warning_errno(link, r, "Could not set address label: %m");
1188 :
1189 0 : link->address_label_messages++;
1190 : }
1191 :
1192 : /* now that we can figure out a default address for the dhcp server,
1193 : start it */
1194 0 : if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
1195 0 : r = dhcp4_server_configure(link);
1196 0 : if (r < 0)
1197 0 : return r;
1198 0 : log_link_debug(link, "Offering DHCPv4 leases");
1199 : }
1200 :
1201 0 : if (link->address_messages == 0) {
1202 0 : link->addresses_configured = true;
1203 0 : link_check_ready(link);
1204 : } else {
1205 0 : log_link_debug(link, "Setting addresses");
1206 0 : link_set_state(link, LINK_STATE_CONFIGURING);
1207 : }
1208 :
1209 0 : return 0;
1210 : }
1211 :
1212 0 : static int link_set_bridge_vlan(Link *link) {
1213 : int r;
1214 :
1215 0 : r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1216 0 : if (r < 0)
1217 0 : log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1218 :
1219 0 : return r;
1220 : }
1221 :
1222 0 : static int link_set_proxy_arp(Link *link) {
1223 : int r;
1224 :
1225 0 : if (!link_proxy_arp_enabled(link))
1226 0 : return 0;
1227 :
1228 0 : r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
1229 0 : if (r < 0)
1230 0 : log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1231 :
1232 0 : return 0;
1233 : }
1234 :
1235 : static int link_configure_after_setting_mtu(Link *link);
1236 :
1237 0 : static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1238 : int r;
1239 :
1240 0 : assert(m);
1241 0 : assert(link);
1242 0 : assert(link->ifname);
1243 :
1244 0 : link->setting_mtu = false;
1245 :
1246 0 : if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1247 0 : return 1;
1248 :
1249 0 : r = sd_netlink_message_get_errno(m);
1250 0 : if (r < 0)
1251 0 : log_link_warning_errno(link, r, "Could not set MTU, ignoring: %m");
1252 : else
1253 0 : log_link_debug(link, "Setting MTU done.");
1254 :
1255 0 : if (link->state == LINK_STATE_INITIALIZED) {
1256 0 : r = link_configure_after_setting_mtu(link);
1257 0 : if (r < 0)
1258 0 : link_enter_failed(link);
1259 : }
1260 :
1261 0 : return 1;
1262 : }
1263 :
1264 0 : int link_set_mtu(Link *link, uint32_t mtu) {
1265 0 : _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1266 : int r;
1267 :
1268 0 : assert(link);
1269 0 : assert(link->manager);
1270 0 : assert(link->manager->rtnl);
1271 :
1272 0 : if (mtu == 0 || link->setting_mtu)
1273 0 : return 0;
1274 :
1275 0 : if (link->mtu == mtu)
1276 0 : return 0;
1277 :
1278 0 : log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
1279 :
1280 0 : r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1281 0 : if (r < 0)
1282 0 : return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1283 :
1284 : /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
1285 : * for this interface, then disable IPv6 else enable it. */
1286 0 : (void) link_enable_ipv6(link);
1287 :
1288 : /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
1289 : * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1290 0 : if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
1291 :
1292 0 : log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1293 : "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1294 :
1295 0 : mtu = IPV6_MIN_MTU;
1296 : }
1297 :
1298 0 : r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
1299 0 : if (r < 0)
1300 0 : return log_link_error_errno(link, r, "Could not append MTU: %m");
1301 :
1302 0 : r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1303 : link_netlink_destroy_callback, link);
1304 0 : if (r < 0)
1305 0 : return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1306 :
1307 0 : link_ref(link);
1308 0 : link->setting_mtu = true;
1309 :
1310 0 : return 0;
1311 : }
1312 :
1313 0 : static bool link_reduces_vlan_mtu(Link *link) {
1314 : /* See netif_reduces_vlan_mtu() in kernel. */
1315 0 : return streq_ptr(link->kind, "macsec");
1316 : }
1317 :
1318 0 : static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1319 0 : uint32_t mtu = 0;
1320 : NetDev *dev;
1321 : Iterator i;
1322 :
1323 0 : HASHMAP_FOREACH(dev, link->network->stacked_netdevs, i)
1324 0 : if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1325 : /* See vlan_dev_change_mtu() in kernel. */
1326 0 : mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1327 :
1328 0 : else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1329 : /* See macvlan_change_mtu() in kernel. */
1330 0 : mtu = dev->mtu;
1331 :
1332 0 : return mtu;
1333 : }
1334 :
1335 0 : static int link_configure_mtu(Link *link) {
1336 : uint32_t mtu;
1337 :
1338 0 : assert(link);
1339 0 : assert(link->network);
1340 :
1341 0 : if (link->network->mtu > 0)
1342 0 : return link_set_mtu(link, link->network->mtu);
1343 :
1344 0 : mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1345 0 : if (link->mtu >= mtu)
1346 0 : return 0;
1347 :
1348 0 : log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1349 : "If it is not desired, then please explicitly specify MTUBytes= setting.",
1350 : link->mtu, mtu);
1351 :
1352 0 : return link_set_mtu(link, mtu);
1353 : }
1354 :
1355 0 : static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1356 : int r;
1357 :
1358 0 : assert(m);
1359 0 : assert(link);
1360 0 : assert(link->ifname);
1361 :
1362 0 : if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1363 0 : return 1;
1364 :
1365 0 : r = sd_netlink_message_get_errno(m);
1366 0 : if (r < 0)
1367 0 : log_link_warning_errno(link, r, "Could not set link flags, ignoring: %m");
1368 :
1369 0 : return 1;
1370 : }
1371 :
1372 0 : static int link_set_flags(Link *link) {
1373 0 : _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1374 0 : unsigned ifi_change = 0;
1375 0 : unsigned ifi_flags = 0;
1376 : int r;
1377 :
1378 0 : assert(link);
1379 0 : assert(link->manager);
1380 0 : assert(link->manager->rtnl);
1381 :
1382 0 : if (link->flags & IFF_LOOPBACK)
1383 0 : return 0;
1384 :
1385 0 : if (!link->network)
1386 0 : return 0;
1387 :
1388 0 : if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
1389 0 : return 0;
1390 :
1391 0 : r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1392 0 : if (r < 0)
1393 0 : return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1394 :
1395 0 : if (link->network->arp >= 0) {
1396 0 : ifi_change |= IFF_NOARP;
1397 0 : SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1398 : }
1399 :
1400 0 : if (link->network->multicast >= 0) {
1401 0 : ifi_change |= IFF_MULTICAST;
1402 0 : SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
1403 : }
1404 :
1405 0 : if (link->network->allmulticast >= 0) {
1406 0 : ifi_change |= IFF_ALLMULTI;
1407 0 : SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1408 : }
1409 :
1410 0 : r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1411 0 : if (r < 0)
1412 0 : return log_link_error_errno(link, r, "Could not set link flags: %m");
1413 :
1414 0 : r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1415 : link_netlink_destroy_callback, link);
1416 0 : if (r < 0)
1417 0 : return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1418 :
1419 0 : link_ref(link);
1420 :
1421 0 : return 0;
1422 : }
1423 :
1424 0 : static int link_acquire_ipv6_conf(Link *link) {
1425 : int r;
1426 :
1427 0 : assert(link);
1428 :
1429 0 : if (link_ipv6_accept_ra_enabled(link)) {
1430 0 : assert(link->ndisc);
1431 :
1432 0 : log_link_debug(link, "Discovering IPv6 routers");
1433 :
1434 0 : r = sd_ndisc_start(link->ndisc);
1435 0 : if (r < 0 && r != -EBUSY)
1436 0 : return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1437 : }
1438 :
1439 0 : if (link_radv_enabled(link)) {
1440 0 : assert(link->radv);
1441 0 : assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1442 :
1443 0 : log_link_debug(link, "Starting IPv6 Router Advertisements");
1444 :
1445 0 : r = sd_radv_start(link->radv);
1446 0 : if (r < 0 && r != -EBUSY)
1447 0 : return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1448 : }
1449 :
1450 0 : (void) dhcp6_request_prefix_delegation(link);
1451 :
1452 0 : return 0;
1453 : }
1454 :
1455 0 : static int link_acquire_ipv4_conf(Link *link) {
1456 : int r;
1457 :
1458 0 : assert(link);
1459 0 : assert(link->manager);
1460 0 : assert(link->manager->event);
1461 :
1462 0 : if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
1463 0 : assert(link->ipv4ll);
1464 :
1465 0 : log_link_debug(link, "Acquiring IPv4 link-local address");
1466 :
1467 0 : r = sd_ipv4ll_start(link->ipv4ll);
1468 0 : if (r < 0)
1469 0 : return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
1470 : }
1471 :
1472 0 : if (link_dhcp4_enabled(link)) {
1473 0 : assert(link->dhcp_client);
1474 :
1475 0 : log_link_debug(link, "Acquiring DHCPv4 lease");
1476 :
1477 0 : r = sd_dhcp_client_start(link->dhcp_client);
1478 0 : if (r < 0)
1479 0 : return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
1480 : }
1481 :
1482 0 : return 0;
1483 : }
1484 :
1485 0 : static int link_acquire_conf(Link *link) {
1486 : int r;
1487 :
1488 0 : assert(link);
1489 :
1490 0 : r = link_acquire_ipv4_conf(link);
1491 0 : if (r < 0)
1492 0 : return r;
1493 :
1494 0 : if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
1495 0 : r = link_acquire_ipv6_conf(link);
1496 0 : if (r < 0)
1497 0 : return r;
1498 : }
1499 :
1500 0 : if (link_lldp_emit_enabled(link)) {
1501 0 : r = link_lldp_emit_start(link);
1502 0 : if (r < 0)
1503 0 : return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1504 : }
1505 :
1506 0 : return 0;
1507 : }
1508 :
1509 18 : bool link_has_carrier(Link *link) {
1510 : /* see Documentation/networking/operstates.txt in the kernel sources */
1511 :
1512 18 : if (link->kernel_operstate == IF_OPER_UP)
1513 3 : return true;
1514 :
1515 15 : if (link->kernel_operstate == IF_OPER_UNKNOWN)
1516 : /* operstate may not be implemented, so fall back to flags */
1517 6 : if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1518 6 : !FLAGS_SET(link->flags, IFF_DORMANT))
1519 6 : return true;
1520 :
1521 9 : return false;
1522 : }
1523 :
1524 0 : static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1525 : int r;
1526 :
1527 0 : assert(link);
1528 :
1529 0 : if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1530 0 : return 1;
1531 :
1532 0 : r = sd_netlink_message_get_errno(m);
1533 0 : if (r < 0)
1534 0 : log_link_warning_errno(link, r, "Could not set address genmode for interface, ignoring: %m");
1535 :
1536 0 : return 1;
1537 : }
1538 :
1539 0 : static int link_configure_addrgen_mode(Link *link) {
1540 0 : _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1541 : uint8_t ipv6ll_mode;
1542 : int r;
1543 :
1544 0 : assert(link);
1545 0 : assert(link->network);
1546 0 : assert(link->manager);
1547 0 : assert(link->manager->rtnl);
1548 :
1549 0 : if (!socket_ipv6_is_supported())
1550 0 : return 0;
1551 :
1552 0 : log_link_debug(link, "Setting address genmode for link");
1553 :
1554 0 : r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1555 0 : if (r < 0)
1556 0 : return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1557 :
1558 0 : r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1559 0 : if (r < 0)
1560 0 : return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1561 :
1562 0 : r = sd_netlink_message_open_container(req, AF_INET6);
1563 0 : if (r < 0)
1564 0 : return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1565 :
1566 0 : if (!link_ipv6ll_enabled(link))
1567 0 : ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1568 0 : else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
1569 : /* The file may not exist. And event if it exists, when stable_secret is unset,
1570 : * reading the file fails with EIO. */
1571 0 : ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1572 : else
1573 0 : ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1574 :
1575 0 : r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1576 0 : if (r < 0)
1577 0 : return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1578 :
1579 0 : r = sd_netlink_message_close_container(req);
1580 0 : if (r < 0)
1581 0 : return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1582 :
1583 0 : r = sd_netlink_message_close_container(req);
1584 0 : if (r < 0)
1585 0 : return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1586 :
1587 0 : r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1588 : link_netlink_destroy_callback, link);
1589 0 : if (r < 0)
1590 0 : return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1591 :
1592 0 : link_ref(link);
1593 :
1594 0 : return 0;
1595 : }
1596 :
1597 0 : static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1598 : int r;
1599 :
1600 0 : assert(link);
1601 :
1602 0 : if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1603 0 : return 1;
1604 :
1605 0 : r = sd_netlink_message_get_errno(m);
1606 0 : if (r < 0)
1607 : /* we warn but don't fail the link, as it may be brought up later */
1608 0 : log_link_warning_errno(link, r, "Could not bring up interface: %m");
1609 :
1610 0 : return 1;
1611 : }
1612 :
1613 0 : static int link_up(Link *link) {
1614 0 : _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1615 : int r;
1616 :
1617 0 : assert(link);
1618 0 : assert(link->network);
1619 0 : assert(link->manager);
1620 0 : assert(link->manager->rtnl);
1621 :
1622 0 : log_link_debug(link, "Bringing link up");
1623 :
1624 0 : r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1625 0 : if (r < 0)
1626 0 : return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1627 :
1628 : /* set it free if not enslaved with networkd */
1629 0 : if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
1630 0 : r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1631 0 : if (r < 0)
1632 0 : return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1633 : }
1634 :
1635 0 : r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
1636 0 : if (r < 0)
1637 0 : return log_link_error_errno(link, r, "Could not set link flags: %m");
1638 :
1639 0 : if (link->network->mac) {
1640 0 : r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
1641 0 : if (r < 0)
1642 0 : return log_link_error_errno(link, r, "Could not set MAC address: %m");
1643 : }
1644 :
1645 0 : r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1646 : link_netlink_destroy_callback, link);
1647 0 : if (r < 0)
1648 0 : return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1649 :
1650 0 : link_ref(link);
1651 :
1652 0 : return 0;
1653 : }
1654 :
1655 0 : static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1656 : int r;
1657 :
1658 0 : assert(link);
1659 :
1660 0 : if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1661 0 : return 1;
1662 :
1663 0 : r = sd_netlink_message_get_errno(m);
1664 0 : if (r < 0)
1665 0 : log_link_warning_errno(link, r, "Could not bring down interface: %m");
1666 :
1667 0 : return 1;
1668 : }
1669 :
1670 0 : int link_down(Link *link, link_netlink_message_handler_t callback) {
1671 0 : _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1672 : int r;
1673 :
1674 0 : assert(link);
1675 0 : assert(link->manager);
1676 0 : assert(link->manager->rtnl);
1677 :
1678 0 : log_link_debug(link, "Bringing link down");
1679 :
1680 0 : r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1681 : RTM_SETLINK, link->ifindex);
1682 0 : if (r < 0)
1683 0 : return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1684 :
1685 0 : r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
1686 0 : if (r < 0)
1687 0 : return log_link_error_errno(link, r, "Could not set link flags: %m");
1688 :
1689 0 : r = netlink_call_async(link->manager->rtnl, NULL, req,
1690 : callback ?: link_down_handler,
1691 : link_netlink_destroy_callback, link);
1692 0 : if (r < 0)
1693 0 : return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1694 :
1695 0 : link_ref(link);
1696 :
1697 0 : return 0;
1698 : }
1699 :
1700 0 : static int link_handle_bound_to_list(Link *link) {
1701 : Link *l;
1702 : Iterator i;
1703 : int r;
1704 0 : bool required_up = false;
1705 0 : bool link_is_up = false;
1706 :
1707 0 : assert(link);
1708 :
1709 0 : if (hashmap_isempty(link->bound_to_links))
1710 0 : return 0;
1711 :
1712 0 : if (link->flags & IFF_UP)
1713 0 : link_is_up = true;
1714 :
1715 0 : HASHMAP_FOREACH (l, link->bound_to_links, i)
1716 0 : if (link_has_carrier(l)) {
1717 0 : required_up = true;
1718 0 : break;
1719 : }
1720 :
1721 0 : if (!required_up && link_is_up) {
1722 0 : r = link_down(link, NULL);
1723 0 : if (r < 0)
1724 0 : return r;
1725 0 : } else if (required_up && !link_is_up) {
1726 0 : r = link_up(link);
1727 0 : if (r < 0)
1728 0 : return r;
1729 : }
1730 :
1731 0 : return 0;
1732 : }
1733 :
1734 0 : static int link_handle_bound_by_list(Link *link) {
1735 : Iterator i;
1736 : Link *l;
1737 : int r;
1738 :
1739 0 : assert(link);
1740 :
1741 0 : if (hashmap_isempty(link->bound_by_links))
1742 0 : return 0;
1743 :
1744 0 : HASHMAP_FOREACH (l, link->bound_by_links, i) {
1745 0 : r = link_handle_bound_to_list(l);
1746 0 : if (r < 0)
1747 0 : return r;
1748 : }
1749 :
1750 0 : return 0;
1751 : }
1752 :
1753 0 : static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1754 : int r;
1755 :
1756 0 : assert(link);
1757 0 : assert(carrier);
1758 :
1759 0 : if (link == carrier)
1760 0 : return 0;
1761 :
1762 0 : if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1763 0 : return 0;
1764 :
1765 0 : r = hashmap_ensure_allocated(h, NULL);
1766 0 : if (r < 0)
1767 0 : return r;
1768 :
1769 0 : r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1770 0 : if (r < 0)
1771 0 : return r;
1772 :
1773 0 : return 0;
1774 : }
1775 :
1776 0 : static int link_new_bound_by_list(Link *link) {
1777 : Manager *m;
1778 : Link *carrier;
1779 : Iterator i;
1780 : int r;
1781 0 : bool list_updated = false;
1782 :
1783 0 : assert(link);
1784 0 : assert(link->manager);
1785 :
1786 0 : m = link->manager;
1787 :
1788 0 : HASHMAP_FOREACH(carrier, m->links, i) {
1789 0 : if (!carrier->network)
1790 0 : continue;
1791 :
1792 0 : if (strv_isempty(carrier->network->bind_carrier))
1793 0 : continue;
1794 :
1795 0 : if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
1796 0 : r = link_put_carrier(link, carrier, &link->bound_by_links);
1797 0 : if (r < 0)
1798 0 : return r;
1799 :
1800 0 : list_updated = true;
1801 : }
1802 : }
1803 :
1804 0 : if (list_updated)
1805 0 : link_dirty(link);
1806 :
1807 0 : HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
1808 0 : r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1809 0 : if (r < 0)
1810 0 : return r;
1811 :
1812 0 : link_dirty(carrier);
1813 : }
1814 :
1815 0 : return 0;
1816 : }
1817 :
1818 0 : static int link_new_bound_to_list(Link *link) {
1819 : Manager *m;
1820 : Link *carrier;
1821 : Iterator i;
1822 : int r;
1823 0 : bool list_updated = false;
1824 :
1825 0 : assert(link);
1826 0 : assert(link->manager);
1827 :
1828 0 : if (!link->network)
1829 0 : return 0;
1830 :
1831 0 : if (strv_isempty(link->network->bind_carrier))
1832 0 : return 0;
1833 :
1834 0 : m = link->manager;
1835 :
1836 0 : HASHMAP_FOREACH (carrier, m->links, i) {
1837 0 : if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
1838 0 : r = link_put_carrier(link, carrier, &link->bound_to_links);
1839 0 : if (r < 0)
1840 0 : return r;
1841 :
1842 0 : list_updated = true;
1843 : }
1844 : }
1845 :
1846 0 : if (list_updated)
1847 0 : link_dirty(link);
1848 :
1849 0 : HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
1850 0 : r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1851 0 : if (r < 0)
1852 0 : return r;
1853 :
1854 0 : link_dirty(carrier);
1855 : }
1856 :
1857 0 : return 0;
1858 : }
1859 :
1860 0 : static int link_new_carrier_maps(Link *link) {
1861 : int r;
1862 :
1863 0 : r = link_new_bound_by_list(link);
1864 0 : if (r < 0)
1865 0 : return r;
1866 :
1867 0 : r = link_handle_bound_by_list(link);
1868 0 : if (r < 0)
1869 0 : return r;
1870 :
1871 0 : r = link_new_bound_to_list(link);
1872 0 : if (r < 0)
1873 0 : return r;
1874 :
1875 0 : r = link_handle_bound_to_list(link);
1876 0 : if (r < 0)
1877 0 : return r;
1878 :
1879 0 : return 0;
1880 : }
1881 :
1882 0 : static void link_free_bound_to_list(Link *link) {
1883 : Link *bound_to;
1884 : Iterator i;
1885 :
1886 0 : HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
1887 0 : hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
1888 :
1889 0 : if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
1890 0 : link_dirty(bound_to);
1891 : }
1892 :
1893 0 : return;
1894 : }
1895 :
1896 0 : static void link_free_bound_by_list(Link *link) {
1897 : Link *bound_by;
1898 : Iterator i;
1899 :
1900 0 : HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
1901 0 : hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
1902 :
1903 0 : if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
1904 0 : link_dirty(bound_by);
1905 0 : link_handle_bound_to_list(bound_by);
1906 : }
1907 : }
1908 :
1909 0 : return;
1910 : }
1911 :
1912 0 : static void link_free_carrier_maps(Link *link) {
1913 0 : bool list_updated = false;
1914 :
1915 0 : assert(link);
1916 :
1917 0 : if (!hashmap_isempty(link->bound_to_links)) {
1918 0 : link_free_bound_to_list(link);
1919 0 : list_updated = true;
1920 : }
1921 :
1922 0 : if (!hashmap_isempty(link->bound_by_links)) {
1923 0 : link_free_bound_by_list(link);
1924 0 : list_updated = true;
1925 : }
1926 :
1927 0 : if (list_updated)
1928 0 : link_dirty(link);
1929 :
1930 0 : return;
1931 : }
1932 :
1933 0 : static int link_append_to_master(Link *link, NetDev *netdev) {
1934 : Link *master;
1935 : int r;
1936 :
1937 0 : assert(link);
1938 0 : assert(netdev);
1939 :
1940 0 : r = link_get(link->manager, netdev->ifindex, &master);
1941 0 : if (r < 0)
1942 0 : return r;
1943 :
1944 0 : r = set_ensure_allocated(&master->slaves, NULL);
1945 0 : if (r < 0)
1946 0 : return r;
1947 :
1948 0 : r = set_put(master->slaves, link);
1949 0 : if (r < 0)
1950 0 : return r;
1951 0 : if (r == 0)
1952 0 : return 0;
1953 :
1954 0 : link_ref(link);
1955 0 : return 0;
1956 : }
1957 :
1958 0 : static void link_drop_from_master(Link *link, NetDev *netdev) {
1959 : Link *master;
1960 :
1961 0 : assert(link);
1962 :
1963 0 : if (!link->manager || !netdev)
1964 0 : return;
1965 :
1966 0 : if (link_get(link->manager, netdev->ifindex, &master) < 0)
1967 0 : return;
1968 :
1969 0 : link_unref(set_remove(master->slaves, link));
1970 : }
1971 :
1972 0 : static void link_detach_from_manager(Link *link) {
1973 0 : if (!link || !link->manager)
1974 0 : return;
1975 :
1976 0 : link_unref(set_remove(link->manager->links_requesting_uuid, link));
1977 0 : link_clean(link);
1978 :
1979 : /* The following must be called at last. */
1980 0 : assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
1981 0 : link_unref(link);
1982 : }
1983 :
1984 0 : void link_drop(Link *link) {
1985 0 : if (!link || link->state == LINK_STATE_LINGER)
1986 0 : return;
1987 :
1988 0 : link_set_state(link, LINK_STATE_LINGER);
1989 :
1990 0 : link_free_carrier_maps(link);
1991 :
1992 0 : if (link->network) {
1993 0 : link_drop_from_master(link, link->network->bridge);
1994 0 : link_drop_from_master(link, link->network->bond);
1995 : }
1996 :
1997 0 : log_link_debug(link, "Link removed");
1998 :
1999 0 : (void) unlink(link->state_file);
2000 0 : link_detach_from_manager(link);
2001 : }
2002 :
2003 0 : static int link_joined(Link *link) {
2004 : int r;
2005 :
2006 0 : assert(link);
2007 0 : assert(link->network);
2008 :
2009 0 : if (!hashmap_isempty(link->bound_to_links)) {
2010 0 : r = link_handle_bound_to_list(link);
2011 0 : if (r < 0)
2012 0 : return r;
2013 0 : } else if (!(link->flags & IFF_UP)) {
2014 0 : r = link_up(link);
2015 0 : if (r < 0) {
2016 0 : link_enter_failed(link);
2017 0 : return r;
2018 : }
2019 : }
2020 :
2021 0 : if (link->network->bridge) {
2022 0 : r = link_set_bridge(link);
2023 0 : if (r < 0)
2024 0 : log_link_error_errno(link, r, "Could not set bridge message: %m");
2025 :
2026 0 : r = link_append_to_master(link, link->network->bridge);
2027 0 : if (r < 0)
2028 0 : log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
2029 : }
2030 :
2031 0 : if (link->network->bond) {
2032 0 : r = link_set_bond(link);
2033 0 : if (r < 0)
2034 0 : log_link_error_errno(link, r, "Could not set bond message: %m");
2035 :
2036 0 : r = link_append_to_master(link, link->network->bond);
2037 0 : if (r < 0)
2038 0 : log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
2039 : }
2040 :
2041 0 : if (link->network->use_br_vlan &&
2042 0 : (link->network->bridge || streq_ptr("bridge", link->kind))) {
2043 0 : r = link_set_bridge_vlan(link);
2044 0 : if (r < 0)
2045 0 : log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2046 : }
2047 :
2048 : /* Skip setting up addresses until it gets carrier,
2049 : or it would try to set addresses twice,
2050 : which is bad for non-idempotent steps. */
2051 0 : if (!link_has_carrier(link) && !link->network->configure_without_carrier)
2052 0 : return 0;
2053 :
2054 0 : link_set_state(link, LINK_STATE_CONFIGURING);
2055 0 : return link_request_set_addresses(link);
2056 : }
2057 :
2058 0 : static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2059 : int r;
2060 :
2061 0 : assert(link);
2062 0 : assert(link->network);
2063 0 : assert(link->enslaving > 0);
2064 :
2065 0 : link->enslaving--;
2066 :
2067 0 : if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2068 0 : return 1;
2069 :
2070 0 : r = sd_netlink_message_get_errno(m);
2071 0 : if (r < 0 && r != -EEXIST) {
2072 0 : log_link_error_errno(link, r, "Could not join netdev: %m");
2073 0 : link_enter_failed(link);
2074 0 : return 1;
2075 : }
2076 :
2077 0 : log_link_debug(link, "Joined netdev");
2078 :
2079 0 : if (link->enslaving == 0) {
2080 0 : r = link_joined(link);
2081 0 : if (r < 0)
2082 0 : link_enter_failed(link);
2083 : }
2084 :
2085 0 : return 1;
2086 : }
2087 :
2088 0 : static int link_enter_join_netdev(Link *link) {
2089 : NetDev *netdev;
2090 : Iterator i;
2091 : int r;
2092 :
2093 0 : assert(link);
2094 0 : assert(link->network);
2095 0 : assert(link->state == LINK_STATE_INITIALIZED);
2096 :
2097 0 : link_set_state(link, LINK_STATE_CONFIGURING);
2098 :
2099 0 : link_dirty(link);
2100 0 : link->enslaving = 0;
2101 :
2102 0 : if (link->network->bond) {
2103 0 : if (link->network->bond->state == NETDEV_STATE_READY &&
2104 0 : link->network->bond->ifindex == link->master_ifindex)
2105 0 : return link_joined(link);
2106 :
2107 0 : log_struct(LOG_DEBUG,
2108 : LOG_LINK_INTERFACE(link),
2109 : LOG_NETDEV_INTERFACE(link->network->bond),
2110 : LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
2111 :
2112 0 : link->enslaving++;
2113 :
2114 0 : r = netdev_join(link->network->bond, link, netdev_join_handler);
2115 0 : if (r < 0) {
2116 0 : log_struct_errno(LOG_WARNING, r,
2117 : LOG_LINK_INTERFACE(link),
2118 : LOG_NETDEV_INTERFACE(link->network->bond),
2119 : LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
2120 0 : link_enter_failed(link);
2121 0 : return r;
2122 : }
2123 : }
2124 :
2125 0 : if (link->network->bridge) {
2126 0 : log_struct(LOG_DEBUG,
2127 : LOG_LINK_INTERFACE(link),
2128 : LOG_NETDEV_INTERFACE(link->network->bridge),
2129 : LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
2130 :
2131 0 : link->enslaving++;
2132 :
2133 0 : r = netdev_join(link->network->bridge, link, netdev_join_handler);
2134 0 : if (r < 0) {
2135 0 : log_struct_errno(LOG_WARNING, r,
2136 : LOG_LINK_INTERFACE(link),
2137 : LOG_NETDEV_INTERFACE(link->network->bridge),
2138 : LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
2139 0 : link_enter_failed(link);
2140 0 : return r;
2141 : }
2142 : }
2143 :
2144 0 : if (link->network->vrf) {
2145 0 : log_struct(LOG_DEBUG,
2146 : LOG_LINK_INTERFACE(link),
2147 : LOG_NETDEV_INTERFACE(link->network->vrf),
2148 : LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2149 :
2150 0 : link->enslaving++;
2151 :
2152 0 : r = netdev_join(link->network->vrf, link, netdev_join_handler);
2153 0 : if (r < 0) {
2154 0 : log_struct_errno(LOG_WARNING, r,
2155 : LOG_LINK_INTERFACE(link),
2156 : LOG_NETDEV_INTERFACE(link->network->vrf),
2157 : LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
2158 0 : link_enter_failed(link);
2159 0 : return r;
2160 : }
2161 : }
2162 :
2163 0 : HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
2164 :
2165 0 : if (netdev->ifindex > 0)
2166 : /* Assume already enslaved. */
2167 0 : continue;
2168 :
2169 0 : if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2170 0 : continue;
2171 :
2172 0 : log_struct(LOG_DEBUG,
2173 : LOG_LINK_INTERFACE(link),
2174 : LOG_NETDEV_INTERFACE(netdev),
2175 : LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
2176 :
2177 0 : link->enslaving++;
2178 :
2179 0 : r = netdev_join(netdev, link, netdev_join_handler);
2180 0 : if (r < 0) {
2181 0 : log_struct_errno(LOG_WARNING, r,
2182 : LOG_LINK_INTERFACE(link),
2183 : LOG_NETDEV_INTERFACE(netdev),
2184 : LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
2185 0 : link_enter_failed(link);
2186 0 : return r;
2187 : }
2188 : }
2189 :
2190 0 : if (link->enslaving == 0)
2191 0 : return link_joined(link);
2192 :
2193 0 : return 0;
2194 : }
2195 :
2196 0 : static int link_set_ipv4_forward(Link *link) {
2197 : int r;
2198 :
2199 0 : if (!link_ipv4_forward_enabled(link))
2200 0 : return 0;
2201 :
2202 : /* We propagate the forwarding flag from one interface to the
2203 : * global setting one way. This means: as long as at least one
2204 : * interface was configured at any time that had IP forwarding
2205 : * enabled the setting will stay on for good. We do this
2206 : * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2207 : * somewhat in sync (see below). */
2208 :
2209 0 : r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
2210 0 : if (r < 0)
2211 0 : log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
2212 :
2213 0 : return 0;
2214 : }
2215 :
2216 0 : static int link_set_ipv6_forward(Link *link) {
2217 : int r;
2218 :
2219 0 : if (!link_ipv6_forward_enabled(link))
2220 0 : return 0;
2221 :
2222 : /* On Linux, the IPv6 stack does not know a per-interface
2223 : * packet forwarding setting: either packet forwarding is on
2224 : * for all, or off for all. We hence don't bother with a
2225 : * per-interface setting, but simply propagate the interface
2226 : * flag, if it is set, to the global flag, one-way. Note that
2227 : * while IPv4 would allow a per-interface flag, we expose the
2228 : * same behaviour there and also propagate the setting from
2229 : * one to all, to keep things simple (see above). */
2230 :
2231 0 : r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
2232 0 : if (r < 0)
2233 0 : log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
2234 :
2235 0 : return 0;
2236 : }
2237 :
2238 0 : static int link_set_ipv6_privacy_extensions(Link *link) {
2239 : IPv6PrivacyExtensions s;
2240 : int r;
2241 :
2242 0 : s = link_ipv6_privacy_extensions(link);
2243 0 : if (s < 0)
2244 0 : return 0;
2245 :
2246 0 : r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
2247 0 : if (r < 0)
2248 0 : log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2249 :
2250 0 : return 0;
2251 : }
2252 :
2253 0 : static int link_set_ipv6_accept_ra(Link *link) {
2254 : int r;
2255 :
2256 : /* Make this a NOP if IPv6 is not available */
2257 0 : if (!socket_ipv6_is_supported())
2258 0 : return 0;
2259 :
2260 0 : if (link->flags & IFF_LOOPBACK)
2261 0 : return 0;
2262 :
2263 0 : if (!link->network)
2264 0 : return 0;
2265 :
2266 0 : r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
2267 0 : if (r < 0)
2268 0 : log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
2269 :
2270 0 : return 0;
2271 : }
2272 :
2273 0 : static int link_set_ipv6_dad_transmits(Link *link) {
2274 : int r;
2275 :
2276 : /* Make this a NOP if IPv6 is not available */
2277 0 : if (!socket_ipv6_is_supported())
2278 0 : return 0;
2279 :
2280 0 : if (link->flags & IFF_LOOPBACK)
2281 0 : return 0;
2282 :
2283 0 : if (!link->network)
2284 0 : return 0;
2285 :
2286 0 : if (link->network->ipv6_dad_transmits < 0)
2287 0 : return 0;
2288 :
2289 0 : r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
2290 0 : if (r < 0)
2291 0 : log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
2292 :
2293 0 : return 0;
2294 : }
2295 :
2296 0 : static int link_set_ipv6_hop_limit(Link *link) {
2297 : int r;
2298 :
2299 : /* Make this a NOP if IPv6 is not available */
2300 0 : if (!socket_ipv6_is_supported())
2301 0 : return 0;
2302 :
2303 0 : if (link->flags & IFF_LOOPBACK)
2304 0 : return 0;
2305 :
2306 0 : if (!link->network)
2307 0 : return 0;
2308 :
2309 0 : if (link->network->ipv6_hop_limit < 0)
2310 0 : return 0;
2311 :
2312 0 : r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
2313 0 : if (r < 0)
2314 0 : log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
2315 :
2316 0 : return 0;
2317 : }
2318 :
2319 0 : static int link_set_ipv6_mtu(Link *link) {
2320 : int r;
2321 :
2322 : /* Make this a NOP if IPv6 is not available */
2323 0 : if (!socket_ipv6_is_supported())
2324 0 : return 0;
2325 :
2326 0 : if (link->flags & IFF_LOOPBACK)
2327 0 : return 0;
2328 :
2329 0 : if (link->network->ipv6_mtu == 0)
2330 0 : return 0;
2331 :
2332 0 : r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
2333 0 : if (r < 0)
2334 0 : log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2335 :
2336 0 : return 0;
2337 : }
2338 :
2339 0 : static bool link_is_static_address_configured(Link *link, Address *address) {
2340 : Address *net_address;
2341 :
2342 0 : assert(link);
2343 0 : assert(address);
2344 :
2345 0 : if (!link->network)
2346 0 : return false;
2347 :
2348 0 : LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2349 0 : if (address_equal(net_address, address))
2350 0 : return true;
2351 :
2352 0 : return false;
2353 : }
2354 :
2355 0 : static bool link_is_neighbor_configured(Link *link, Neighbor *neighbor) {
2356 : Neighbor *net_neighbor;
2357 :
2358 0 : assert(link);
2359 0 : assert(neighbor);
2360 :
2361 0 : if (!link->network)
2362 0 : return false;
2363 :
2364 0 : LIST_FOREACH(neighbors, net_neighbor, link->network->neighbors)
2365 0 : if (neighbor_equal(net_neighbor, neighbor))
2366 0 : return true;
2367 :
2368 0 : return false;
2369 : }
2370 :
2371 0 : static bool link_is_static_route_configured(Link *link, Route *route) {
2372 : Route *net_route;
2373 :
2374 0 : assert(link);
2375 0 : assert(route);
2376 :
2377 0 : if (!link->network)
2378 0 : return false;
2379 :
2380 0 : LIST_FOREACH(routes, net_route, link->network->static_routes)
2381 0 : if (route_equal(net_route, route))
2382 0 : return true;
2383 :
2384 0 : return false;
2385 : }
2386 :
2387 0 : static bool link_address_is_dynamic(Link *link, Address *address) {
2388 : Route *route;
2389 : Iterator i;
2390 :
2391 0 : assert(link);
2392 0 : assert(address);
2393 :
2394 0 : if (address->cinfo.ifa_prefered != CACHE_INFO_INFINITY_LIFE_TIME)
2395 0 : return true;
2396 :
2397 : /* Even when the address is leased from a DHCP server, networkd assign the address
2398 : * without lifetime when KeepConfiguration=dhcp. So, let's check that we have
2399 : * corresponding routes with RTPROT_DHCP. */
2400 0 : SET_FOREACH(route, link->routes_foreign, i) {
2401 0 : if (route->protocol != RTPROT_DHCP)
2402 0 : continue;
2403 :
2404 0 : if (address->family != route->family)
2405 0 : continue;
2406 :
2407 0 : if (in_addr_equal(address->family, &address->in_addr, &route->prefsrc))
2408 0 : return true;
2409 : }
2410 :
2411 0 : return false;
2412 : }
2413 :
2414 0 : static int link_drop_foreign_config(Link *link) {
2415 : Address *address;
2416 : Neighbor *neighbor;
2417 : Route *route;
2418 : Iterator i;
2419 : int r;
2420 :
2421 0 : SET_FOREACH(address, link->addresses_foreign, i) {
2422 : /* we consider IPv6LL addresses to be managed by the kernel */
2423 0 : if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2424 0 : continue;
2425 :
2426 0 : if (link_address_is_dynamic(link, address)) {
2427 0 : if (FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2428 0 : continue;
2429 0 : } else if (FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2430 0 : continue;
2431 :
2432 0 : if (link_is_static_address_configured(link, address)) {
2433 0 : r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2434 0 : if (r < 0)
2435 0 : return log_link_error_errno(link, r, "Failed to add address: %m");
2436 : } else {
2437 0 : r = address_remove(address, link, NULL);
2438 0 : if (r < 0)
2439 0 : return r;
2440 : }
2441 : }
2442 :
2443 0 : SET_FOREACH(neighbor, link->neighbors_foreign, i) {
2444 0 : if (link_is_neighbor_configured(link, neighbor)) {
2445 0 : r = neighbor_add(link, neighbor->family, &neighbor->in_addr, &neighbor->lladdr, neighbor->lladdr_size, NULL);
2446 0 : if (r < 0)
2447 0 : return r;
2448 : } else {
2449 0 : r = neighbor_remove(neighbor, link, NULL);
2450 0 : if (r < 0)
2451 0 : return r;
2452 : }
2453 : }
2454 :
2455 0 : SET_FOREACH(route, link->routes_foreign, i) {
2456 : /* do not touch routes managed by the kernel */
2457 0 : if (route->protocol == RTPROT_KERNEL)
2458 0 : continue;
2459 :
2460 : /* do not touch multicast route added by kernel */
2461 : /* FIXME: Why the kernel adds this route with protocol RTPROT_BOOT??? We need to investigate that.
2462 : * https://tools.ietf.org/html/rfc4862#section-5.4 may explain why. */
2463 0 : if (route->protocol == RTPROT_BOOT &&
2464 0 : route->family == AF_INET6 &&
2465 0 : route->dst_prefixlen == 8 &&
2466 0 : in_addr_equal(AF_INET6, &route->dst, &(union in_addr_union) { .in6 = {{{ 0xff,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0 }}} }))
2467 0 : continue;
2468 :
2469 0 : if (route->protocol == RTPROT_STATIC &&
2470 0 : FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2471 0 : continue;
2472 :
2473 0 : if (route->protocol == RTPROT_DHCP &&
2474 0 : FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2475 0 : continue;
2476 :
2477 0 : if (link_is_static_route_configured(link, route)) {
2478 0 : r = route_add(link, route->family, &route->dst, route->dst_prefixlen, &route->gw, route->tos, route->priority, route->table, NULL);
2479 0 : if (r < 0)
2480 0 : return r;
2481 : } else {
2482 0 : r = route_remove(route, link, NULL);
2483 0 : if (r < 0)
2484 0 : return r;
2485 : }
2486 : }
2487 :
2488 0 : return 0;
2489 : }
2490 :
2491 0 : static int link_drop_config(Link *link) {
2492 : Address *address, *pool_address;
2493 : Neighbor *neighbor;
2494 : Route *route;
2495 : Iterator i;
2496 : int r;
2497 :
2498 0 : SET_FOREACH(address, link->addresses, i) {
2499 : /* we consider IPv6LL addresses to be managed by the kernel */
2500 0 : if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2501 0 : continue;
2502 :
2503 0 : r = address_remove(address, link, NULL);
2504 0 : if (r < 0)
2505 0 : return r;
2506 :
2507 : /* If this address came from an address pool, clean up the pool */
2508 0 : LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2509 0 : if (address_equal(address, pool_address)) {
2510 0 : LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2511 0 : address_free(pool_address);
2512 0 : break;
2513 : }
2514 : }
2515 : }
2516 :
2517 0 : SET_FOREACH(neighbor, link->neighbors, i) {
2518 0 : r = neighbor_remove(neighbor, link, NULL);
2519 0 : if (r < 0)
2520 0 : return r;
2521 : }
2522 :
2523 0 : SET_FOREACH(route, link->routes, i) {
2524 : /* do not touch routes managed by the kernel */
2525 0 : if (route->protocol == RTPROT_KERNEL)
2526 0 : continue;
2527 :
2528 0 : r = route_remove(route, link, NULL);
2529 0 : if (r < 0)
2530 0 : return r;
2531 : }
2532 :
2533 0 : ndisc_flush(link);
2534 :
2535 0 : return 0;
2536 : }
2537 :
2538 0 : static int link_configure(Link *link) {
2539 : int r;
2540 :
2541 0 : assert(link);
2542 0 : assert(link->network);
2543 0 : assert(link->state == LINK_STATE_INITIALIZED);
2544 :
2545 0 : if (link->iftype == ARPHRD_CAN)
2546 0 : return link_configure_can(link);
2547 :
2548 : /* Drop foreign config, but ignore loopback or critical devices.
2549 : * We do not want to remove loopback address or addresses used for root NFS. */
2550 0 : if (!(link->flags & IFF_LOOPBACK) &&
2551 0 : link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
2552 0 : r = link_drop_foreign_config(link);
2553 0 : if (r < 0)
2554 0 : return r;
2555 : }
2556 :
2557 0 : r = link_set_proxy_arp(link);
2558 0 : if (r < 0)
2559 0 : return r;
2560 :
2561 0 : r = ipv6_proxy_ndp_addresses_configure(link);
2562 0 : if (r < 0)
2563 0 : return r;
2564 :
2565 0 : r = link_set_ipv4_forward(link);
2566 0 : if (r < 0)
2567 0 : return r;
2568 :
2569 0 : r = link_set_ipv6_forward(link);
2570 0 : if (r < 0)
2571 0 : return r;
2572 :
2573 0 : r = link_set_ipv6_privacy_extensions(link);
2574 0 : if (r < 0)
2575 0 : return r;
2576 :
2577 0 : r = link_set_ipv6_accept_ra(link);
2578 0 : if (r < 0)
2579 0 : return r;
2580 :
2581 0 : r = link_set_ipv6_dad_transmits(link);
2582 0 : if (r < 0)
2583 0 : return r;
2584 :
2585 0 : r = link_set_ipv6_hop_limit(link);
2586 0 : if (r < 0)
2587 0 : return r;
2588 :
2589 0 : r = link_set_flags(link);
2590 0 : if (r < 0)
2591 0 : return r;
2592 :
2593 0 : r = link_set_ipv6_mtu(link);
2594 0 : if (r < 0)
2595 0 : return r;
2596 :
2597 0 : if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
2598 0 : r = ipv4ll_configure(link);
2599 0 : if (r < 0)
2600 0 : return r;
2601 : }
2602 :
2603 0 : if (link_dhcp4_enabled(link)) {
2604 0 : r = dhcp4_set_promote_secondaries(link);
2605 0 : if (r < 0)
2606 0 : return r;
2607 :
2608 0 : r = dhcp4_configure(link);
2609 0 : if (r < 0)
2610 0 : return r;
2611 : }
2612 :
2613 0 : if (link_dhcp4_server_enabled(link)) {
2614 0 : r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2615 0 : if (r < 0)
2616 0 : return r;
2617 :
2618 0 : r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2619 0 : if (r < 0)
2620 0 : return r;
2621 : }
2622 :
2623 0 : if (link_dhcp6_enabled(link) ||
2624 0 : link_ipv6_accept_ra_enabled(link)) {
2625 0 : r = dhcp6_configure(link);
2626 0 : if (r < 0)
2627 0 : return r;
2628 : }
2629 :
2630 0 : if (link_ipv6_accept_ra_enabled(link)) {
2631 0 : r = ndisc_configure(link);
2632 0 : if (r < 0)
2633 0 : return r;
2634 : }
2635 :
2636 0 : if (link_radv_enabled(link)) {
2637 0 : r = radv_configure(link);
2638 0 : if (r < 0)
2639 0 : return r;
2640 : }
2641 :
2642 0 : if (link_lldp_rx_enabled(link)) {
2643 0 : r = link_lldp_rx_configure(link);
2644 0 : if (r < 0)
2645 0 : return r;
2646 : }
2647 :
2648 0 : r = link_configure_mtu(link);
2649 0 : if (r < 0)
2650 0 : return r;
2651 :
2652 0 : r = link_configure_addrgen_mode(link);
2653 0 : if (r < 0)
2654 0 : return r;
2655 :
2656 0 : return link_configure_after_setting_mtu(link);
2657 : }
2658 :
2659 0 : static int link_configure_after_setting_mtu(Link *link) {
2660 : int r;
2661 :
2662 0 : assert(link);
2663 0 : assert(link->network);
2664 0 : assert(link->state == LINK_STATE_INITIALIZED);
2665 :
2666 0 : if (link->setting_mtu)
2667 0 : return 0;
2668 :
2669 0 : if (link_has_carrier(link) || link->network->configure_without_carrier) {
2670 0 : r = link_acquire_conf(link);
2671 0 : if (r < 0)
2672 0 : return r;
2673 : }
2674 :
2675 0 : return link_enter_join_netdev(link);
2676 : }
2677 :
2678 0 : static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2679 0 : assert(duid);
2680 :
2681 0 : if (duid->raw_data_len > 0)
2682 0 : return 0;
2683 :
2684 0 : if (duid->type != DUID_TYPE_UUID)
2685 0 : return -EINVAL;
2686 :
2687 0 : memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2688 0 : duid->raw_data_len = sizeof(sd_id128_t);
2689 :
2690 0 : return 1;
2691 : }
2692 :
2693 0 : int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2694 0 : Manager *manager = userdata;
2695 : const sd_bus_error *e;
2696 : const void *a;
2697 : size_t sz;
2698 : DUID *duid;
2699 : Link *link;
2700 : int r;
2701 :
2702 0 : assert(m);
2703 0 : assert(manager);
2704 :
2705 0 : e = sd_bus_message_get_error(m);
2706 0 : if (e) {
2707 0 : log_error_errno(sd_bus_error_get_errno(e),
2708 : "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
2709 : e->message);
2710 0 : goto configure;
2711 : }
2712 :
2713 0 : r = sd_bus_message_read_array(m, 'y', &a, &sz);
2714 0 : if (r < 0)
2715 0 : goto configure;
2716 :
2717 0 : if (sz != sizeof(sd_id128_t)) {
2718 0 : log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
2719 0 : goto configure;
2720 : }
2721 :
2722 0 : memcpy(&manager->product_uuid, a, sz);
2723 0 : while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2724 0 : (void) duid_set_uuid(duid, manager->product_uuid);
2725 :
2726 0 : manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2727 :
2728 0 : configure:
2729 0 : while ((link = set_steal_first(manager->links_requesting_uuid))) {
2730 0 : link_unref(link);
2731 :
2732 0 : r = link_configure(link);
2733 0 : if (r < 0)
2734 0 : link_enter_failed(link);
2735 : }
2736 :
2737 0 : manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
2738 :
2739 : /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2740 : * even if the method fails. */
2741 0 : manager->has_product_uuid = true;
2742 :
2743 0 : return 1;
2744 : }
2745 :
2746 0 : static bool link_requires_uuid(Link *link) {
2747 : const DUID *duid;
2748 :
2749 0 : assert(link);
2750 0 : assert(link->manager);
2751 0 : assert(link->network);
2752 :
2753 0 : duid = link_get_duid(link);
2754 0 : if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
2755 0 : return false;
2756 :
2757 0 : if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
2758 0 : return true;
2759 :
2760 0 : if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
2761 0 : return true;
2762 :
2763 0 : return false;
2764 : }
2765 :
2766 0 : static int link_configure_duid(Link *link) {
2767 : Manager *m;
2768 : DUID *duid;
2769 : int r;
2770 :
2771 0 : assert(link);
2772 0 : assert(link->manager);
2773 0 : assert(link->network);
2774 :
2775 0 : m = link->manager;
2776 0 : duid = link_get_duid(link);
2777 :
2778 0 : if (!link_requires_uuid(link))
2779 0 : return 1;
2780 :
2781 0 : if (m->has_product_uuid) {
2782 0 : (void) duid_set_uuid(duid, m->product_uuid);
2783 0 : return 1;
2784 : }
2785 :
2786 0 : if (!m->links_requesting_uuid) {
2787 0 : r = manager_request_product_uuid(m, link);
2788 0 : if (r < 0) {
2789 0 : if (r == -ENOMEM)
2790 0 : return r;
2791 :
2792 0 : log_link_warning_errno(link, r,
2793 : "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
2794 0 : return 1;
2795 : }
2796 : } else {
2797 0 : r = set_put(m->links_requesting_uuid, link);
2798 0 : if (r < 0)
2799 0 : return log_oom();
2800 :
2801 0 : r = set_put(m->duids_requesting_uuid, duid);
2802 0 : if (r < 0)
2803 0 : return log_oom();
2804 :
2805 0 : link_ref(link);
2806 : }
2807 :
2808 0 : return 0;
2809 : }
2810 :
2811 0 : static int link_initialized_and_synced(Link *link) {
2812 : Network *network;
2813 : int r;
2814 :
2815 0 : assert(link);
2816 0 : assert(link->ifname);
2817 0 : assert(link->manager);
2818 :
2819 : /* We may get called either from the asynchronous netlink callback,
2820 : * or directly for link_add() if running in a container. See link_add(). */
2821 0 : if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
2822 0 : return 0;
2823 :
2824 0 : log_link_debug(link, "Link state is up-to-date");
2825 0 : link_set_state(link, LINK_STATE_INITIALIZED);
2826 :
2827 0 : r = link_new_bound_by_list(link);
2828 0 : if (r < 0)
2829 0 : return r;
2830 :
2831 0 : r = link_handle_bound_by_list(link);
2832 0 : if (r < 0)
2833 0 : return r;
2834 :
2835 0 : if (!link->network) {
2836 0 : r = network_get(link->manager, link->sd_device, link->ifname,
2837 0 : &link->mac, &network);
2838 0 : if (r == -ENOENT) {
2839 0 : link_enter_unmanaged(link);
2840 0 : return 0;
2841 0 : } else if (r == 0 && network->unmanaged) {
2842 0 : link_enter_unmanaged(link);
2843 0 : return 0;
2844 0 : } else if (r < 0)
2845 0 : return r;
2846 :
2847 0 : if (link->flags & IFF_LOOPBACK) {
2848 0 : if (network->link_local != ADDRESS_FAMILY_NO)
2849 0 : log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
2850 :
2851 0 : if (network->dhcp != ADDRESS_FAMILY_NO)
2852 0 : log_link_debug(link, "Ignoring DHCP clients for loopback link");
2853 :
2854 0 : if (network->dhcp_server)
2855 0 : log_link_debug(link, "Ignoring DHCP server for loopback link");
2856 : }
2857 :
2858 0 : r = network_apply(network, link);
2859 0 : if (r < 0)
2860 0 : return r;
2861 : }
2862 :
2863 0 : r = link_new_bound_to_list(link);
2864 0 : if (r < 0)
2865 0 : return r;
2866 :
2867 : /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2868 : * link_configure() is called later asynchronously. */
2869 0 : r = link_configure_duid(link);
2870 0 : if (r <= 0)
2871 0 : return r;
2872 :
2873 0 : r = link_configure(link);
2874 0 : if (r < 0)
2875 0 : return r;
2876 :
2877 0 : return 0;
2878 : }
2879 :
2880 0 : static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2881 : int r;
2882 :
2883 0 : r = link_initialized_and_synced(link);
2884 0 : if (r < 0)
2885 0 : link_enter_failed(link);
2886 0 : return 1;
2887 : }
2888 :
2889 6 : int link_initialized(Link *link, sd_device *device) {
2890 6 : _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2891 : int r;
2892 :
2893 6 : assert(link);
2894 6 : assert(link->manager);
2895 6 : assert(link->manager->rtnl);
2896 6 : assert(device);
2897 :
2898 6 : if (link->state != LINK_STATE_PENDING)
2899 0 : return 0;
2900 :
2901 6 : if (link->sd_device)
2902 0 : return 0;
2903 :
2904 6 : log_link_debug(link, "udev initialized link");
2905 6 : link_set_state(link, LINK_STATE_INITIALIZED);
2906 :
2907 6 : link->sd_device = sd_device_ref(device);
2908 :
2909 : /* udev has initialized the link, but we don't know if we have yet
2910 : * processed the NEWLINK messages with the latest state. Do a GETLINK,
2911 : * when it returns we know that the pending NEWLINKs have already been
2912 : * processed and that we are up-to-date */
2913 :
2914 6 : r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2915 : link->ifindex);
2916 6 : if (r < 0)
2917 0 : return r;
2918 :
2919 6 : r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
2920 : link_netlink_destroy_callback, link);
2921 6 : if (r < 0)
2922 0 : return r;
2923 :
2924 6 : link_ref(link);
2925 :
2926 6 : return 0;
2927 : }
2928 :
2929 6 : static int link_load(Link *link) {
2930 6 : _cleanup_free_ char *network_file = NULL,
2931 6 : *addresses = NULL,
2932 6 : *routes = NULL,
2933 6 : *dhcp4_address = NULL,
2934 6 : *ipv4ll_address = NULL;
2935 : union in_addr_union address;
2936 : union in_addr_union route_dst;
2937 : const char *p;
2938 : int r;
2939 :
2940 6 : assert(link);
2941 :
2942 6 : r = parse_env_file(NULL, link->state_file,
2943 : "NETWORK_FILE", &network_file,
2944 : "ADDRESSES", &addresses,
2945 : "ROUTES", &routes,
2946 : "DHCP4_ADDRESS", &dhcp4_address,
2947 : "IPV4LL_ADDRESS", &ipv4ll_address);
2948 6 : if (r < 0 && r != -ENOENT)
2949 0 : return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
2950 :
2951 6 : if (network_file) {
2952 : Network *network;
2953 : char *suffix;
2954 :
2955 : /* drop suffix */
2956 0 : suffix = strrchr(network_file, '.');
2957 0 : if (!suffix) {
2958 0 : log_link_debug(link, "Failed to get network name from %s", network_file);
2959 0 : goto network_file_fail;
2960 : }
2961 0 : *suffix = '\0';
2962 :
2963 0 : r = network_get_by_name(link->manager, basename(network_file), &network);
2964 0 : if (r < 0) {
2965 0 : log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
2966 0 : goto network_file_fail;
2967 : }
2968 :
2969 0 : r = network_apply(network, link);
2970 0 : if (r < 0)
2971 0 : return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
2972 : }
2973 :
2974 6 : network_file_fail:
2975 :
2976 6 : if (addresses) {
2977 0 : p = addresses;
2978 :
2979 0 : for (;;) {
2980 0 : _cleanup_free_ char *address_str = NULL;
2981 : char *prefixlen_str;
2982 : int family;
2983 : unsigned char prefixlen;
2984 :
2985 0 : r = extract_first_word(&p, &address_str, NULL, 0);
2986 0 : if (r < 0) {
2987 0 : log_link_debug_errno(link, r, "Failed to extract next address string: %m");
2988 0 : continue;
2989 : }
2990 0 : if (r == 0)
2991 0 : break;
2992 :
2993 0 : prefixlen_str = strchr(address_str, '/');
2994 0 : if (!prefixlen_str) {
2995 0 : log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
2996 0 : continue;
2997 : }
2998 :
2999 0 : *prefixlen_str++ = '\0';
3000 :
3001 0 : r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3002 0 : if (r != 1) {
3003 0 : log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3004 0 : continue;
3005 : }
3006 :
3007 0 : r = in_addr_from_string_auto(address_str, &family, &address);
3008 0 : if (r < 0) {
3009 0 : log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
3010 0 : continue;
3011 : }
3012 :
3013 0 : r = address_add(link, family, &address, prefixlen, NULL);
3014 0 : if (r < 0)
3015 0 : return log_link_error_errno(link, r, "Failed to add address: %m");
3016 : }
3017 : }
3018 :
3019 6 : if (routes) {
3020 0 : p = routes;
3021 :
3022 0 : for (;;) {
3023 : Route *route;
3024 0 : _cleanup_free_ char *route_str = NULL;
3025 0 : _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
3026 : usec_t lifetime;
3027 : char *prefixlen_str;
3028 : int family;
3029 : unsigned char prefixlen, tos, table;
3030 : uint32_t priority;
3031 :
3032 0 : r = extract_first_word(&p, &route_str, NULL, 0);
3033 0 : if (r < 0) {
3034 0 : log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3035 0 : continue;
3036 : }
3037 0 : if (r == 0)
3038 0 : break;
3039 :
3040 0 : prefixlen_str = strchr(route_str, '/');
3041 0 : if (!prefixlen_str) {
3042 0 : log_link_debug(link, "Failed to parse route %s", route_str);
3043 0 : continue;
3044 : }
3045 :
3046 0 : *prefixlen_str++ = '\0';
3047 :
3048 0 : r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3049 0 : if (r != 5) {
3050 0 : log_link_debug(link,
3051 : "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3052 : prefixlen_str);
3053 0 : continue;
3054 : }
3055 :
3056 0 : r = in_addr_from_string_auto(route_str, &family, &route_dst);
3057 0 : if (r < 0) {
3058 0 : log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
3059 0 : continue;
3060 : }
3061 :
3062 0 : r = route_add(link, family, &route_dst, prefixlen, NULL, tos, priority, table, &route);
3063 0 : if (r < 0)
3064 0 : return log_link_error_errno(link, r, "Failed to add route: %m");
3065 :
3066 0 : if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
3067 0 : r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3068 : 0, route_expire_handler, route);
3069 0 : if (r < 0)
3070 0 : log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3071 : }
3072 :
3073 0 : route->lifetime = lifetime;
3074 0 : sd_event_source_unref(route->expire);
3075 0 : route->expire = TAKE_PTR(expire);
3076 : }
3077 : }
3078 :
3079 6 : if (dhcp4_address) {
3080 0 : r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3081 0 : if (r < 0) {
3082 0 : log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
3083 0 : goto dhcp4_address_fail;
3084 : }
3085 :
3086 0 : r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
3087 0 : if (r < 0)
3088 0 : return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
3089 :
3090 0 : r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3091 0 : if (r < 0)
3092 0 : return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
3093 : }
3094 :
3095 6 : dhcp4_address_fail:
3096 :
3097 6 : if (ipv4ll_address) {
3098 0 : r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3099 0 : if (r < 0) {
3100 0 : log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
3101 0 : goto ipv4ll_address_fail;
3102 : }
3103 :
3104 0 : r = sd_ipv4ll_new(&link->ipv4ll);
3105 0 : if (r < 0)
3106 0 : return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
3107 :
3108 0 : r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3109 0 : if (r < 0)
3110 0 : return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
3111 : }
3112 :
3113 6 : ipv4ll_address_fail:
3114 :
3115 6 : return 0;
3116 : }
3117 :
3118 6 : int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
3119 6 : _cleanup_(sd_device_unrefp) sd_device *device = NULL;
3120 : char ifindex_str[2 + DECIMAL_STR_MAX(int)];
3121 : Link *link;
3122 : int r;
3123 :
3124 6 : assert(m);
3125 6 : assert(m->rtnl);
3126 6 : assert(message);
3127 6 : assert(ret);
3128 :
3129 6 : r = link_new(m, message, ret);
3130 6 : if (r < 0)
3131 0 : return r;
3132 :
3133 6 : link = *ret;
3134 :
3135 6 : log_link_debug(link, "Link %d added", link->ifindex);
3136 :
3137 6 : r = link_load(link);
3138 6 : if (r < 0)
3139 0 : return r;
3140 :
3141 6 : if (detect_container() <= 0) {
3142 : /* not in a container, udev will be around */
3143 6 : sprintf(ifindex_str, "n%d", link->ifindex);
3144 6 : r = sd_device_new_from_device_id(&device, ifindex_str);
3145 6 : if (r < 0) {
3146 0 : log_link_warning_errno(link, r, "Could not find device: %m");
3147 0 : goto failed;
3148 : }
3149 :
3150 6 : r = sd_device_get_is_initialized(device);
3151 6 : if (r < 0) {
3152 0 : log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3153 0 : goto failed;
3154 : }
3155 6 : if (r == 0) {
3156 : /* not yet ready */
3157 0 : log_link_debug(link, "link pending udev initialization...");
3158 0 : return 0;
3159 : }
3160 :
3161 6 : r = device_is_renaming(device);
3162 6 : if (r < 0) {
3163 0 : log_link_warning_errno(link, r, "Failed to determine the device is renamed or not: %m");
3164 0 : goto failed;
3165 : }
3166 6 : if (r > 0) {
3167 0 : log_link_debug(link, "Interface is under renaming, pending initialization.");
3168 0 : return 0;
3169 : }
3170 :
3171 6 : r = link_initialized(link, device);
3172 6 : if (r < 0)
3173 0 : goto failed;
3174 : } else {
3175 0 : r = link_initialized_and_synced(link);
3176 0 : if (r < 0)
3177 0 : goto failed;
3178 : }
3179 :
3180 6 : return 0;
3181 0 : failed:
3182 0 : link_enter_failed(link);
3183 0 : return r;
3184 : }
3185 :
3186 0 : int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
3187 : int r;
3188 :
3189 0 : assert(link);
3190 :
3191 0 : log_link_info(link, "Gained IPv6LL");
3192 :
3193 0 : link->ipv6ll_address = *address;
3194 0 : link_check_ready(link);
3195 :
3196 0 : if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
3197 0 : r = link_acquire_ipv6_conf(link);
3198 0 : if (r < 0) {
3199 0 : link_enter_failed(link);
3200 0 : return r;
3201 : }
3202 : }
3203 :
3204 0 : return 0;
3205 : }
3206 :
3207 0 : static int link_carrier_gained(Link *link) {
3208 : int r;
3209 :
3210 0 : assert(link);
3211 :
3212 0 : if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
3213 0 : r = link_acquire_conf(link);
3214 0 : if (r < 0) {
3215 0 : link_enter_failed(link);
3216 0 : return r;
3217 : }
3218 :
3219 0 : link_set_state(link, LINK_STATE_CONFIGURING);
3220 0 : r = link_request_set_addresses(link);
3221 0 : if (r < 0)
3222 0 : return r;
3223 : }
3224 :
3225 0 : r = link_handle_bound_by_list(link);
3226 0 : if (r < 0)
3227 0 : return r;
3228 :
3229 0 : return 0;
3230 : }
3231 :
3232 0 : static int link_carrier_lost(Link *link) {
3233 : int r;
3234 :
3235 0 : assert(link);
3236 :
3237 0 : if (link->network && link->network->ignore_carrier_loss)
3238 0 : return 0;
3239 :
3240 : /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
3241 : * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3242 : * configuration and stop the clients as well. */
3243 0 : if (link->setting_mtu)
3244 0 : return 0;
3245 :
3246 0 : r = link_stop_clients(link, false);
3247 0 : if (r < 0) {
3248 0 : link_enter_failed(link);
3249 0 : return r;
3250 : }
3251 :
3252 0 : if (link_dhcp4_server_enabled(link))
3253 0 : (void) sd_dhcp_server_stop(link->dhcp_server);
3254 :
3255 0 : r = link_drop_config(link);
3256 0 : if (r < 0)
3257 0 : return r;
3258 :
3259 0 : if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3260 0 : log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
3261 0 : r = link_drop_foreign_config(link);
3262 0 : if (r < 0)
3263 0 : return r;
3264 : }
3265 :
3266 0 : r = link_handle_bound_by_list(link);
3267 0 : if (r < 0)
3268 0 : return r;
3269 :
3270 0 : return 0;
3271 : }
3272 :
3273 0 : int link_carrier_reset(Link *link) {
3274 : int r;
3275 :
3276 0 : assert(link);
3277 :
3278 0 : if (link_has_carrier(link)) {
3279 0 : r = link_carrier_lost(link);
3280 0 : if (r < 0)
3281 0 : return r;
3282 :
3283 0 : r = link_carrier_gained(link);
3284 0 : if (r < 0)
3285 0 : return r;
3286 :
3287 0 : log_link_info(link, "Reset carrier");
3288 : }
3289 :
3290 0 : return 0;
3291 : }
3292 :
3293 6 : int link_update(Link *link, sd_netlink_message *m) {
3294 : struct ether_addr mac;
3295 : const char *ifname;
3296 : uint32_t mtu;
3297 : bool had_carrier, carrier_gained, carrier_lost;
3298 : int old_master, r;
3299 :
3300 6 : assert(link);
3301 6 : assert(link->ifname);
3302 6 : assert(m);
3303 :
3304 6 : if (link->state == LINK_STATE_LINGER) {
3305 0 : log_link_info(link, "Link re-added");
3306 0 : link_set_state(link, LINK_STATE_CONFIGURING);
3307 :
3308 0 : r = link_new_carrier_maps(link);
3309 0 : if (r < 0)
3310 0 : return r;
3311 : }
3312 :
3313 6 : r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
3314 6 : if (r >= 0 && !streq(ifname, link->ifname)) {
3315 0 : Manager *manager = link->manager;
3316 :
3317 0 : log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
3318 :
3319 0 : link_drop(link);
3320 0 : r = link_add(manager, m, &link);
3321 0 : if (r < 0)
3322 0 : return r;
3323 : }
3324 :
3325 6 : r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
3326 6 : if (r >= 0 && mtu > 0) {
3327 6 : link->mtu = mtu;
3328 6 : if (link->original_mtu == 0) {
3329 6 : link->original_mtu = mtu;
3330 6 : log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
3331 : }
3332 :
3333 6 : if (link->dhcp_client) {
3334 0 : r = sd_dhcp_client_set_mtu(link->dhcp_client,
3335 0 : link->mtu);
3336 0 : if (r < 0)
3337 0 : return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
3338 : }
3339 :
3340 6 : if (link->radv) {
3341 0 : r = sd_radv_set_mtu(link->radv, link->mtu);
3342 0 : if (r < 0)
3343 0 : return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3344 : }
3345 : }
3346 :
3347 : /* The kernel may broadcast NEWLINK messages without the MAC address
3348 : set, simply ignore them. */
3349 6 : r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
3350 6 : if (r >= 0) {
3351 5 : if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3352 : ETH_ALEN)) {
3353 :
3354 0 : memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3355 : ETH_ALEN);
3356 :
3357 0 : log_link_debug(link, "MAC address: "
3358 : "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3359 : mac.ether_addr_octet[0],
3360 : mac.ether_addr_octet[1],
3361 : mac.ether_addr_octet[2],
3362 : mac.ether_addr_octet[3],
3363 : mac.ether_addr_octet[4],
3364 : mac.ether_addr_octet[5]);
3365 :
3366 0 : if (link->ipv4ll) {
3367 0 : r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
3368 0 : if (r < 0)
3369 0 : return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
3370 : }
3371 :
3372 0 : if (link->dhcp_client) {
3373 0 : r = sd_dhcp_client_set_mac(link->dhcp_client,
3374 0 : (const uint8_t *) &link->mac,
3375 : sizeof (link->mac),
3376 : ARPHRD_ETHER);
3377 0 : if (r < 0)
3378 0 : return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
3379 :
3380 0 : r = dhcp4_set_client_identifier(link);
3381 0 : if (r < 0)
3382 0 : return r;
3383 : }
3384 :
3385 0 : if (link->dhcp6_client) {
3386 0 : const DUID* duid = link_get_duid(link);
3387 :
3388 0 : r = sd_dhcp6_client_set_mac(link->dhcp6_client,
3389 0 : (const uint8_t *) &link->mac,
3390 : sizeof (link->mac),
3391 : ARPHRD_ETHER);
3392 0 : if (r < 0)
3393 0 : return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
3394 :
3395 0 : if (link->network->iaid_set) {
3396 0 : r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3397 0 : link->network->iaid);
3398 0 : if (r < 0)
3399 0 : return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3400 : }
3401 :
3402 0 : r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3403 0 : duid->type,
3404 0 : duid->raw_data_len > 0 ? duid->raw_data : NULL,
3405 0 : duid->raw_data_len);
3406 0 : if (r < 0)
3407 0 : return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
3408 : }
3409 :
3410 0 : if (link->radv) {
3411 0 : r = sd_radv_set_mac(link->radv, &link->mac);
3412 0 : if (r < 0)
3413 0 : return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3414 : }
3415 :
3416 0 : if (link->ndisc) {
3417 0 : r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3418 0 : if (r < 0)
3419 0 : return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3420 : }
3421 : }
3422 : }
3423 :
3424 6 : old_master = link->master_ifindex;
3425 6 : (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
3426 :
3427 6 : had_carrier = link_has_carrier(link);
3428 :
3429 6 : r = link_update_flags(link, m, old_master != link->master_ifindex);
3430 6 : if (r < 0)
3431 0 : return r;
3432 :
3433 6 : r = link_update_lldp(link);
3434 6 : if (r < 0)
3435 0 : return r;
3436 :
3437 6 : carrier_gained = !had_carrier && link_has_carrier(link);
3438 6 : carrier_lost = had_carrier && !link_has_carrier(link);
3439 :
3440 6 : if (carrier_gained) {
3441 0 : log_link_info(link, "Gained carrier");
3442 :
3443 0 : r = link_carrier_gained(link);
3444 0 : if (r < 0)
3445 0 : return r;
3446 6 : } else if (carrier_lost) {
3447 0 : log_link_info(link, "Lost carrier");
3448 :
3449 0 : r = link_carrier_lost(link);
3450 0 : if (r < 0)
3451 0 : return r;
3452 : }
3453 :
3454 6 : return 0;
3455 : }
3456 :
3457 0 : static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3458 0 : bool space = false;
3459 : Iterator i;
3460 : Link *link;
3461 :
3462 0 : assert(f);
3463 0 : assert(prefix);
3464 :
3465 0 : if (hashmap_isempty(h))
3466 0 : return;
3467 :
3468 0 : fputs(prefix, f);
3469 0 : HASHMAP_FOREACH(link, h, i) {
3470 0 : if (space)
3471 0 : fputc(' ', f);
3472 :
3473 0 : fprintf(f, "%i", link->ifindex);
3474 0 : space = true;
3475 : }
3476 :
3477 0 : fputc('\n', f);
3478 : }
3479 :
3480 0 : static void link_save_dns(FILE *f, struct in_addr_data *dns, unsigned n_dns, bool *space) {
3481 : unsigned j;
3482 : int r;
3483 :
3484 0 : for (j = 0; j < n_dns; j++) {
3485 0 : _cleanup_free_ char *b = NULL;
3486 :
3487 0 : r = in_addr_to_string(dns[j].family, &dns[j].address, &b);
3488 0 : if (r < 0) {
3489 0 : log_debug_errno(r, "Failed to format address, ignoring: %m");
3490 0 : continue;
3491 : }
3492 :
3493 0 : if (*space)
3494 0 : fputc(' ', f);
3495 0 : fputs(b, f);
3496 0 : *space = true;
3497 : }
3498 0 : }
3499 :
3500 0 : int link_save(Link *link) {
3501 0 : _cleanup_free_ char *temp_path = NULL;
3502 0 : _cleanup_fclose_ FILE *f = NULL;
3503 : const char *admin_state, *oper_state, *carrier_state, *address_state;
3504 : Address *a;
3505 : Route *route;
3506 : Iterator i;
3507 : int r;
3508 :
3509 0 : assert(link);
3510 0 : assert(link->state_file);
3511 0 : assert(link->lease_file);
3512 0 : assert(link->manager);
3513 :
3514 0 : if (link->state == LINK_STATE_LINGER) {
3515 0 : (void) unlink(link->state_file);
3516 0 : return 0;
3517 : }
3518 :
3519 0 : link_lldp_save(link);
3520 :
3521 0 : admin_state = link_state_to_string(link->state);
3522 0 : assert(admin_state);
3523 :
3524 0 : oper_state = link_operstate_to_string(link->operstate);
3525 0 : assert(oper_state);
3526 :
3527 0 : carrier_state = link_carrier_state_to_string(link->carrier_state);
3528 0 : assert(carrier_state);
3529 :
3530 0 : address_state = link_address_state_to_string(link->address_state);
3531 0 : assert(address_state);
3532 :
3533 0 : r = fopen_temporary(link->state_file, &f, &temp_path);
3534 0 : if (r < 0)
3535 0 : goto fail;
3536 :
3537 0 : (void) fchmod(fileno(f), 0644);
3538 :
3539 0 : fprintf(f,
3540 : "# This is private data. Do not parse.\n"
3541 : "ADMIN_STATE=%s\n"
3542 : "OPER_STATE=%s\n"
3543 : "CARRIER_STATE=%s\n"
3544 : "ADDRESS_STATE=%s\n",
3545 : admin_state, oper_state, carrier_state, address_state);
3546 :
3547 0 : if (link->network) {
3548 0 : char **dhcp6_domains = NULL, **dhcp_domains = NULL;
3549 0 : const char *dhcp_domainname = NULL, *p;
3550 0 : sd_dhcp6_lease *dhcp6_lease = NULL;
3551 : bool space;
3552 :
3553 0 : fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3554 0 : yes_no(link->network->required_for_online));
3555 :
3556 0 : fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s\n",
3557 0 : strempty(link_operstate_to_string(link->network->required_operstate_for_online)));
3558 :
3559 0 : if (link->dhcp6_client) {
3560 0 : r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3561 0 : if (r < 0 && r != -ENOMSG)
3562 0 : log_link_debug(link, "No DHCPv6 lease");
3563 : }
3564 :
3565 0 : fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3566 :
3567 0 : fputs("DNS=", f);
3568 0 : space = false;
3569 :
3570 0 : if (link->n_dns != (unsigned) -1)
3571 0 : link_save_dns(f, link->dns, link->n_dns, &space);
3572 : else
3573 0 : link_save_dns(f, link->network->dns, link->network->n_dns, &space);
3574 :
3575 0 : if (link->network->dhcp_use_dns &&
3576 0 : link->dhcp_lease) {
3577 : const struct in_addr *addresses;
3578 :
3579 0 : r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
3580 0 : if (r > 0)
3581 0 : if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3582 0 : space = true;
3583 : }
3584 :
3585 0 : if (link->network->dhcp6_use_dns && dhcp6_lease) {
3586 : struct in6_addr *in6_addrs;
3587 :
3588 0 : r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3589 0 : if (r > 0) {
3590 0 : if (space)
3591 0 : fputc(' ', f);
3592 0 : serialize_in6_addrs(f, in6_addrs, r);
3593 0 : space = true;
3594 : }
3595 : }
3596 :
3597 : /* Make sure to flush out old entries before we use the NDISC data */
3598 0 : ndisc_vacuum(link);
3599 :
3600 0 : if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
3601 : NDiscRDNSS *dd;
3602 :
3603 0 : SET_FOREACH(dd, link->ndisc_rdnss, i) {
3604 0 : if (space)
3605 0 : fputc(' ', f);
3606 :
3607 0 : serialize_in6_addrs(f, &dd->address, 1);
3608 0 : space = true;
3609 : }
3610 : }
3611 :
3612 0 : fputc('\n', f);
3613 :
3614 0 : fputs("NTP=", f);
3615 0 : space = false;
3616 0 : fputstrv(f, link->ntp ?: link->network->ntp, NULL, &space);
3617 :
3618 0 : if (link->network->dhcp_use_ntp &&
3619 0 : link->dhcp_lease) {
3620 : const struct in_addr *addresses;
3621 :
3622 0 : r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
3623 0 : if (r > 0)
3624 0 : if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3625 0 : space = true;
3626 : }
3627 :
3628 0 : if (link->network->dhcp6_use_ntp && dhcp6_lease) {
3629 : struct in6_addr *in6_addrs;
3630 : char **hosts;
3631 :
3632 0 : r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3633 : &in6_addrs);
3634 0 : if (r > 0) {
3635 0 : if (space)
3636 0 : fputc(' ', f);
3637 0 : serialize_in6_addrs(f, in6_addrs, r);
3638 0 : space = true;
3639 : }
3640 :
3641 0 : r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3642 0 : if (r > 0)
3643 0 : fputstrv(f, hosts, NULL, &space);
3644 : }
3645 :
3646 0 : fputc('\n', f);
3647 :
3648 0 : if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
3649 0 : if (link->dhcp_lease) {
3650 0 : (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
3651 0 : (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3652 : }
3653 0 : if (dhcp6_lease)
3654 0 : (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
3655 : }
3656 :
3657 0 : fputs("DOMAINS=", f);
3658 0 : space = false;
3659 0 : ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains, i)
3660 0 : fputs_with_space(f, p, NULL, &space);
3661 :
3662 0 : if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3663 0 : if (dhcp_domainname)
3664 0 : fputs_with_space(f, dhcp_domainname, NULL, &space);
3665 0 : if (dhcp_domains)
3666 0 : fputstrv(f, dhcp_domains, NULL, &space);
3667 0 : if (dhcp6_domains)
3668 0 : fputstrv(f, dhcp6_domains, NULL, &space);
3669 : }
3670 :
3671 0 : if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
3672 : NDiscDNSSL *dd;
3673 :
3674 0 : SET_FOREACH(dd, link->ndisc_dnssl, i)
3675 0 : fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3676 : }
3677 :
3678 0 : fputc('\n', f);
3679 :
3680 0 : fputs("ROUTE_DOMAINS=", f);
3681 0 : space = false;
3682 0 : ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains, i)
3683 0 : fputs_with_space(f, p, NULL, &space);
3684 :
3685 0 : if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3686 0 : if (dhcp_domainname)
3687 0 : fputs_with_space(f, dhcp_domainname, NULL, &space);
3688 0 : if (dhcp_domains)
3689 0 : fputstrv(f, dhcp_domains, NULL, &space);
3690 0 : if (dhcp6_domains)
3691 0 : fputstrv(f, dhcp6_domains, NULL, &space);
3692 : }
3693 :
3694 0 : if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3695 : NDiscDNSSL *dd;
3696 :
3697 0 : SET_FOREACH(dd, link->ndisc_dnssl, i)
3698 0 : fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3699 : }
3700 :
3701 0 : fputc('\n', f);
3702 :
3703 0 : fprintf(f, "LLMNR=%s\n",
3704 0 : resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
3705 0 : fprintf(f, "MDNS=%s\n",
3706 0 : resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
3707 0 : if (link->dns_default_route >= 0)
3708 0 : fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->dns_default_route));
3709 0 : else if (link->network->dns_default_route >= 0)
3710 0 : fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
3711 :
3712 0 : if (link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3713 0 : fprintf(f, "DNS_OVER_TLS=%s\n",
3714 : dns_over_tls_mode_to_string(link->dns_over_tls_mode));
3715 0 : else if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3716 0 : fprintf(f, "DNS_OVER_TLS=%s\n",
3717 0 : dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
3718 :
3719 0 : if (link->dnssec_mode != _DNSSEC_MODE_INVALID)
3720 0 : fprintf(f, "DNSSEC=%s\n",
3721 : dnssec_mode_to_string(link->dnssec_mode));
3722 0 : else if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3723 0 : fprintf(f, "DNSSEC=%s\n",
3724 0 : dnssec_mode_to_string(link->network->dnssec_mode));
3725 :
3726 0 : if (!set_isempty(link->dnssec_negative_trust_anchors)) {
3727 : const char *n;
3728 :
3729 0 : fputs("DNSSEC_NTA=", f);
3730 0 : space = false;
3731 0 : SET_FOREACH(n, link->dnssec_negative_trust_anchors, i)
3732 0 : fputs_with_space(f, n, NULL, &space);
3733 0 : fputc('\n', f);
3734 0 : } else if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3735 : const char *n;
3736 :
3737 0 : fputs("DNSSEC_NTA=", f);
3738 0 : space = false;
3739 0 : SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3740 0 : fputs_with_space(f, n, NULL, &space);
3741 0 : fputc('\n', f);
3742 : }
3743 :
3744 0 : fputs("ADDRESSES=", f);
3745 0 : space = false;
3746 0 : SET_FOREACH(a, link->addresses, i) {
3747 0 : _cleanup_free_ char *address_str = NULL;
3748 :
3749 0 : r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3750 0 : if (r < 0)
3751 0 : goto fail;
3752 :
3753 0 : fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3754 0 : space = true;
3755 : }
3756 0 : fputc('\n', f);
3757 :
3758 0 : fputs("ROUTES=", f);
3759 0 : space = false;
3760 0 : SET_FOREACH(route, link->routes, i) {
3761 0 : _cleanup_free_ char *route_str = NULL;
3762 :
3763 0 : r = in_addr_to_string(route->family, &route->dst, &route_str);
3764 0 : if (r < 0)
3765 0 : goto fail;
3766 :
3767 0 : fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3768 0 : space ? " " : "", route_str,
3769 0 : route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
3770 0 : space = true;
3771 : }
3772 :
3773 0 : fputc('\n', f);
3774 : }
3775 :
3776 0 : print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3777 0 : print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
3778 :
3779 0 : if (link->dhcp_lease) {
3780 : struct in_addr address;
3781 0 : const char *tz = NULL;
3782 :
3783 0 : assert(link->network);
3784 :
3785 0 : r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3786 0 : if (r >= 0)
3787 0 : fprintf(f, "TIMEZONE=%s\n", tz);
3788 :
3789 0 : r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3790 0 : if (r >= 0) {
3791 0 : fputs("DHCP4_ADDRESS=", f);
3792 0 : serialize_in_addrs(f, &address, 1, false, NULL);
3793 0 : fputc('\n', f);
3794 : }
3795 :
3796 0 : r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
3797 0 : if (r < 0)
3798 0 : goto fail;
3799 :
3800 0 : fprintf(f,
3801 : "DHCP_LEASE=%s\n",
3802 : link->lease_file);
3803 : } else
3804 0 : (void) unlink(link->lease_file);
3805 :
3806 0 : if (link->ipv4ll) {
3807 : struct in_addr address;
3808 :
3809 0 : r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3810 0 : if (r >= 0) {
3811 0 : fputs("IPV4LL_ADDRESS=", f);
3812 0 : serialize_in_addrs(f, &address, 1, false, NULL);
3813 0 : fputc('\n', f);
3814 : }
3815 : }
3816 :
3817 0 : r = fflush_and_check(f);
3818 0 : if (r < 0)
3819 0 : goto fail;
3820 :
3821 0 : if (rename(temp_path, link->state_file) < 0) {
3822 0 : r = -errno;
3823 0 : goto fail;
3824 : }
3825 :
3826 0 : return 0;
3827 :
3828 0 : fail:
3829 0 : (void) unlink(link->state_file);
3830 0 : if (temp_path)
3831 0 : (void) unlink(temp_path);
3832 :
3833 0 : return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
3834 : }
3835 :
3836 : /* The serialized state in /run is no longer up-to-date. */
3837 5 : void link_dirty(Link *link) {
3838 : int r;
3839 :
3840 5 : assert(link);
3841 :
3842 : /* mark manager dirty as link is dirty */
3843 5 : manager_dirty(link->manager);
3844 :
3845 5 : r = set_ensure_allocated(&link->manager->dirty_links, NULL);
3846 5 : if (r < 0)
3847 : /* allocation errors are ignored */
3848 0 : return;
3849 :
3850 5 : r = set_put(link->manager->dirty_links, link);
3851 5 : if (r <= 0)
3852 : /* don't take another ref if the link was already dirty */
3853 0 : return;
3854 :
3855 5 : link_ref(link);
3856 : }
3857 :
3858 : /* The serialized state in /run is up-to-date */
3859 0 : void link_clean(Link *link) {
3860 0 : assert(link);
3861 0 : assert(link->manager);
3862 :
3863 0 : link_unref(set_remove(link->manager->dirty_links, link));
3864 0 : }
3865 :
3866 : static const char* const link_state_table[_LINK_STATE_MAX] = {
3867 : [LINK_STATE_PENDING] = "pending",
3868 : [LINK_STATE_INITIALIZED] = "initialized",
3869 : [LINK_STATE_CONFIGURING] = "configuring",
3870 : [LINK_STATE_CONFIGURED] = "configured",
3871 : [LINK_STATE_UNMANAGED] = "unmanaged",
3872 : [LINK_STATE_FAILED] = "failed",
3873 : [LINK_STATE_LINGER] = "linger",
3874 : };
3875 :
3876 12 : DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
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