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1 | /* SPDX-License-Identifier: LGPL-2.1+ */ | |
2 | ||
3 | #include <netinet/in.h> | |
4 | #include <linux/if.h> | |
5 | #include <unistd.h> | |
6 | ||
7 | #include "alloc-util.h" | |
8 | #include "bus-util.h" | |
9 | #include "dhcp-identifier.h" | |
10 | #include "dhcp-lease-internal.h" | |
11 | #include "env-file.h" | |
12 | #include "fd-util.h" | |
13 | #include "fileio.h" | |
14 | #include "missing_network.h" | |
15 | #include "netdev/bond.h" | |
16 | #include "netdev/bridge.h" | |
17 | #include "netdev/ipvlan.h" | |
18 | #include "netdev/vrf.h" | |
19 | #include "netlink-util.h" | |
20 | #include "network-internal.h" | |
21 | #include "networkd-can.h" | |
22 | #include "networkd-ipv6-proxy-ndp.h" | |
23 | #include "networkd-lldp-tx.h" | |
24 | #include "networkd-manager.h" | |
25 | #include "networkd-ndisc.h" | |
26 | #include "networkd-neighbor.h" | |
27 | #include "networkd-radv.h" | |
28 | #include "networkd-routing-policy-rule.h" | |
29 | #include "set.h" | |
30 | #include "socket-util.h" | |
31 | #include "stdio-util.h" | |
32 | #include "string-table.h" | |
33 | #include "strv.h" | |
34 | #include "sysctl-util.h" | |
35 | #include "tmpfile-util.h" | |
36 | #include "udev-util.h" | |
37 | #include "util.h" | |
38 | #include "virt.h" | |
39 | ||
40 | uint32_t link_get_vrf_table(Link *link) { | |
41 | return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN; | |
42 | } | |
43 | ||
44 | uint32_t link_get_dhcp_route_table(Link *link) { | |
45 | /* When the interface is part of an VRF use the VRFs routing table, unless | |
46 | * another table is explicitly specified. */ | |
47 | if (link->network->dhcp_route_table_set) | |
48 | return link->network->dhcp_route_table; | |
49 | return link_get_vrf_table(link); | |
50 | } | |
51 | ||
52 | uint32_t link_get_ipv6_accept_ra_route_table(Link *link) { | |
53 | if (link->network->ipv6_accept_ra_route_table_set) | |
54 | return link->network->ipv6_accept_ra_route_table; | |
55 | return link_get_vrf_table(link); | |
56 | } | |
57 | ||
58 | DUID* link_get_duid(Link *link) { | |
59 | if (link->network->duid.type != _DUID_TYPE_INVALID) | |
60 | return &link->network->duid; | |
61 | else | |
62 | return &link->manager->duid; | |
63 | } | |
64 | ||
65 | static bool link_dhcp6_enabled(Link *link) { | |
66 | assert(link); | |
67 | ||
68 | if (!socket_ipv6_is_supported()) | |
69 | return false; | |
70 | ||
71 | if (link->flags & IFF_LOOPBACK) | |
72 | return false; | |
73 | ||
74 | if (!link->network) | |
75 | return false; | |
76 | ||
77 | if (link->network->bond) | |
78 | return false; | |
79 | ||
80 | if (STRPTR_IN_SET(link->kind, "can", "vcan")) | |
81 | return false; | |
82 | ||
83 | if (manager_sysctl_ipv6_enabled(link->manager) == 0) | |
84 | return false; | |
85 | ||
86 | return link->network->dhcp & ADDRESS_FAMILY_IPV6; | |
87 | } | |
88 | ||
89 | static bool link_dhcp4_enabled(Link *link) { | |
90 | assert(link); | |
91 | ||
92 | if (link->flags & IFF_LOOPBACK) | |
93 | return false; | |
94 | ||
95 | if (!link->network) | |
96 | return false; | |
97 | ||
98 | if (link->network->bond) | |
99 | return false; | |
100 | ||
101 | if (STRPTR_IN_SET(link->kind, "can", "vcan")) | |
102 | return false; | |
103 | ||
104 | return link->network->dhcp & ADDRESS_FAMILY_IPV4; | |
105 | } | |
106 | ||
107 | static bool link_dhcp4_server_enabled(Link *link) { | |
108 | assert(link); | |
109 | ||
110 | if (link->flags & IFF_LOOPBACK) | |
111 | return false; | |
112 | ||
113 | if (!link->network) | |
114 | return false; | |
115 | ||
116 | if (link->network->bond) | |
117 | return false; | |
118 | ||
119 | if (STRPTR_IN_SET(link->kind, "can", "vcan")) | |
120 | return false; | |
121 | ||
122 | return link->network->dhcp_server; | |
123 | } | |
124 | ||
125 | bool link_ipv4ll_enabled(Link *link, AddressFamilyBoolean mask) { | |
126 | assert(link); | |
127 | assert((mask & ~(ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) == 0); | |
128 | ||
129 | if (link->flags & IFF_LOOPBACK) | |
130 | return false; | |
131 | ||
132 | if (!link->network) | |
133 | return false; | |
134 | ||
135 | if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "ip6gre", "ip6tnl", "sit", "vti", "vti6", "can", "vcan")) | |
136 | return false; | |
137 | ||
138 | /* L3 or L3S mode do not support ARP. */ | |
139 | if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S)) | |
140 | return false; | |
141 | ||
142 | if (link->network->bond) | |
143 | return false; | |
144 | ||
145 | return link->network->link_local & mask; | |
146 | } | |
147 | ||
148 | static bool link_ipv6ll_enabled(Link *link) { | |
149 | assert(link); | |
150 | ||
151 | if (!socket_ipv6_is_supported()) | |
152 | return false; | |
153 | ||
154 | if (link->flags & IFF_LOOPBACK) | |
155 | return false; | |
156 | ||
157 | if (!link->network) | |
158 | return false; | |
159 | ||
160 | if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "can", "vcan")) | |
161 | return false; | |
162 | ||
163 | if (link->network->bond) | |
164 | return false; | |
165 | ||
166 | if (manager_sysctl_ipv6_enabled(link->manager) == 0) | |
167 | return false; | |
168 | ||
169 | return link->network->link_local & ADDRESS_FAMILY_IPV6; | |
170 | } | |
171 | ||
172 | static bool link_ipv6_enabled(Link *link) { | |
173 | assert(link); | |
174 | ||
175 | if (!socket_ipv6_is_supported()) | |
176 | return false; | |
177 | ||
178 | if (link->network->bond) | |
179 | return false; | |
180 | ||
181 | if (manager_sysctl_ipv6_enabled(link->manager) == 0) | |
182 | return false; | |
183 | ||
184 | if (STRPTR_IN_SET(link->kind, "can", "vcan")) | |
185 | return false; | |
186 | ||
187 | /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */ | |
188 | return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network); | |
189 | } | |
190 | ||
191 | static bool link_radv_enabled(Link *link) { | |
192 | assert(link); | |
193 | ||
194 | if (!link_ipv6ll_enabled(link)) | |
195 | return false; | |
196 | ||
197 | return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE; | |
198 | } | |
199 | ||
200 | static bool link_ipv4_forward_enabled(Link *link) { | |
201 | assert(link); | |
202 | ||
203 | if (link->flags & IFF_LOOPBACK) | |
204 | return false; | |
205 | ||
206 | if (!link->network) | |
207 | return false; | |
208 | ||
209 | if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID) | |
210 | return false; | |
211 | ||
212 | return link->network->ip_forward & ADDRESS_FAMILY_IPV4; | |
213 | } | |
214 | ||
215 | static bool link_ipv6_forward_enabled(Link *link) { | |
216 | assert(link); | |
217 | ||
218 | if (!socket_ipv6_is_supported()) | |
219 | return false; | |
220 | ||
221 | if (link->flags & IFF_LOOPBACK) | |
222 | return false; | |
223 | ||
224 | if (!link->network) | |
225 | return false; | |
226 | ||
227 | if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID) | |
228 | return false; | |
229 | ||
230 | if (manager_sysctl_ipv6_enabled(link->manager) == 0) | |
231 | return false; | |
232 | ||
233 | return link->network->ip_forward & ADDRESS_FAMILY_IPV6; | |
234 | } | |
235 | ||
236 | static bool link_proxy_arp_enabled(Link *link) { | |
237 | assert(link); | |
238 | ||
239 | if (link->flags & IFF_LOOPBACK) | |
240 | return false; | |
241 | ||
242 | if (!link->network) | |
243 | return false; | |
244 | ||
245 | if (link->network->proxy_arp < 0) | |
246 | return false; | |
247 | ||
248 | return true; | |
249 | } | |
250 | ||
251 | static bool link_ipv6_accept_ra_enabled(Link *link) { | |
252 | assert(link); | |
253 | ||
254 | if (!socket_ipv6_is_supported()) | |
255 | return false; | |
256 | ||
257 | if (link->flags & IFF_LOOPBACK) | |
258 | return false; | |
259 | ||
260 | if (!link->network) | |
261 | return false; | |
262 | ||
263 | if (!link_ipv6ll_enabled(link)) | |
264 | return false; | |
265 | ||
266 | /* If unset use system default (enabled if local forwarding is disabled. | |
267 | * disabled if local forwarding is enabled). | |
268 | * If set, ignore or enforce RA independent of local forwarding state. | |
269 | */ | |
270 | if (link->network->ipv6_accept_ra < 0) | |
271 | /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */ | |
272 | return !link_ipv6_forward_enabled(link); | |
273 | else if (link->network->ipv6_accept_ra > 0) | |
274 | /* accept RA even if ip_forward is enabled */ | |
275 | return true; | |
276 | else | |
277 | /* ignore RA */ | |
278 | return false; | |
279 | } | |
280 | ||
281 | static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) { | |
282 | assert(link); | |
283 | ||
284 | if (!socket_ipv6_is_supported()) | |
285 | return _IPV6_PRIVACY_EXTENSIONS_INVALID; | |
286 | ||
287 | if (link->flags & IFF_LOOPBACK) | |
288 | return _IPV6_PRIVACY_EXTENSIONS_INVALID; | |
289 | ||
290 | if (!link->network) | |
291 | return _IPV6_PRIVACY_EXTENSIONS_INVALID; | |
292 | ||
293 | return link->network->ipv6_privacy_extensions; | |
294 | } | |
295 | ||
296 | static int link_enable_ipv6(Link *link) { | |
297 | bool disabled; | |
298 | int r; | |
299 | ||
300 | if (link->flags & IFF_LOOPBACK) | |
301 | return 0; | |
302 | ||
303 | disabled = !link_ipv6_enabled(link); | |
304 | ||
305 | r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", disabled); | |
306 | if (r < 0) | |
307 | log_link_warning_errno(link, r, "Cannot %s IPv6: %m", enable_disable(!disabled)); | |
308 | else | |
309 | log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled)); | |
310 | ||
311 | return 0; | |
312 | } | |
313 | ||
314 | static bool link_is_enslaved(Link *link) { | |
315 | if (link->flags & IFF_SLAVE) | |
316 | /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */ | |
317 | return true; | |
318 | ||
319 | if (!link->network) | |
320 | return false; | |
321 | ||
322 | if (link->master_ifindex > 0 && link->network->bridge) | |
323 | return true; | |
324 | ||
325 | /* TODO: add conditions for other netdevs. */ | |
326 | ||
327 | return false; | |
328 | } | |
329 | ||
330 | static void link_update_master_operstate(Link *link, NetDev *netdev) { | |
331 | Link *master; | |
332 | ||
333 | if (!netdev) | |
334 | return; | |
335 | ||
336 | if (link_get(link->manager, netdev->ifindex, &master) < 0) | |
337 | return; | |
338 | ||
339 | link_update_operstate(master, true); | |
340 | } | |
341 | ||
342 | void link_update_operstate(Link *link, bool also_update_master) { | |
343 | LinkOperationalState operstate; | |
344 | Iterator i; | |
345 | ||
346 | assert(link); | |
347 | ||
348 | if (link->kernel_operstate == IF_OPER_DORMANT) | |
349 | operstate = LINK_OPERSTATE_DORMANT; | |
350 | else if (link_has_carrier(link)) { | |
351 | Address *address; | |
352 | uint8_t scope = RT_SCOPE_NOWHERE; | |
353 | ||
354 | /* if we have carrier, check what addresses we have */ | |
355 | SET_FOREACH(address, link->addresses, i) { | |
356 | if (!address_is_ready(address)) | |
357 | continue; | |
358 | ||
359 | if (address->scope < scope) | |
360 | scope = address->scope; | |
361 | } | |
362 | ||
363 | /* for operstate we also take foreign addresses into account */ | |
364 | SET_FOREACH(address, link->addresses_foreign, i) { | |
365 | if (!address_is_ready(address)) | |
366 | continue; | |
367 | ||
368 | if (address->scope < scope) | |
369 | scope = address->scope; | |
370 | } | |
371 | ||
372 | if (scope < RT_SCOPE_SITE) | |
373 | /* universally accessible addresses found */ | |
374 | operstate = LINK_OPERSTATE_ROUTABLE; | |
375 | else if (scope < RT_SCOPE_HOST) | |
376 | /* only link or site local addresses found */ | |
377 | operstate = LINK_OPERSTATE_DEGRADED; | |
378 | else | |
379 | /* no useful addresses found */ | |
380 | operstate = LINK_OPERSTATE_CARRIER; | |
381 | } else if (link->flags & IFF_UP) | |
382 | operstate = LINK_OPERSTATE_NO_CARRIER; | |
383 | else | |
384 | operstate = LINK_OPERSTATE_OFF; | |
385 | ||
386 | if (IN_SET(operstate, LINK_OPERSTATE_DEGRADED, LINK_OPERSTATE_CARRIER) && | |
387 | link_is_enslaved(link)) | |
388 | operstate = LINK_OPERSTATE_ENSLAVED; | |
389 | ||
390 | if (operstate >= LINK_OPERSTATE_CARRIER) { | |
391 | Link *slave; | |
392 | ||
393 | SET_FOREACH(slave, link->slaves, i) { | |
394 | link_update_operstate(slave, false); | |
395 | ||
396 | if (slave->operstate < LINK_OPERSTATE_CARRIER) | |
397 | operstate = LINK_OPERSTATE_DEGRADED_CARRIER; | |
398 | } | |
399 | } | |
400 | ||
401 | if (link->operstate != operstate) { | |
402 | link->operstate = operstate; | |
403 | link_send_changed(link, "OperationalState", NULL); | |
404 | link_dirty(link); | |
405 | } | |
406 | ||
407 | if (also_update_master && link->network) { | |
408 | link_update_master_operstate(link, link->network->bond); | |
409 | link_update_master_operstate(link, link->network->bridge); | |
410 | } | |
411 | } | |
412 | ||
413 | #define FLAG_STRING(string, flag, old, new) \ | |
414 | (((old ^ new) & flag) \ | |
415 | ? ((old & flag) ? (" -" string) : (" +" string)) \ | |
416 | : "") | |
417 | ||
418 | static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) { | |
419 | unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags; | |
420 | uint8_t operstate; | |
421 | int r; | |
422 | ||
423 | assert(link); | |
424 | ||
425 | r = sd_rtnl_message_link_get_flags(m, &flags); | |
426 | if (r < 0) | |
427 | return log_link_warning_errno(link, r, "Could not get link flags: %m"); | |
428 | ||
429 | r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate); | |
430 | if (r < 0) | |
431 | /* if we got a message without operstate, take it to mean | |
432 | the state was unchanged */ | |
433 | operstate = link->kernel_operstate; | |
434 | ||
435 | if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate)) | |
436 | return 0; | |
437 | ||
438 | if (link->flags != flags) { | |
439 | 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", | |
440 | FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags), | |
441 | FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags), | |
442 | FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags), | |
443 | FLAG_STRING("UP", IFF_UP, link->flags, flags), | |
444 | FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags), | |
445 | FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags), | |
446 | FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags), | |
447 | FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags), | |
448 | FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags), | |
449 | FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags), | |
450 | FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags), | |
451 | FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags), | |
452 | FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags), | |
453 | FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags), | |
454 | FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags), | |
455 | FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags), | |
456 | FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags), | |
457 | FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags), | |
458 | FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags)); | |
459 | ||
460 | unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP | | |
461 | IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING | | |
462 | IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT | | |
463 | IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL | | |
464 | IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP | | |
465 | IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO); | |
466 | unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags); | |
467 | unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags); | |
468 | ||
469 | /* link flags are currently at most 18 bits, let's align to | |
470 | * printing 20 */ | |
471 | if (unknown_flags_added) | |
472 | log_link_debug(link, | |
473 | "Unknown link flags gained: %#.5x (ignoring)", | |
474 | unknown_flags_added); | |
475 | ||
476 | if (unknown_flags_removed) | |
477 | log_link_debug(link, | |
478 | "Unknown link flags lost: %#.5x (ignoring)", | |
479 | unknown_flags_removed); | |
480 | } | |
481 | ||
482 | link->flags = flags; | |
483 | link->kernel_operstate = operstate; | |
484 | ||
485 | link_update_operstate(link, true); | |
486 | ||
487 | return 0; | |
488 | } | |
489 | ||
490 | static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) { | |
491 | _cleanup_(link_unrefp) Link *link = NULL; | |
492 | uint16_t type; | |
493 | const char *ifname, *kind = NULL; | |
494 | int r, ifindex; | |
495 | unsigned short iftype; | |
496 | ||
497 | assert(manager); | |
498 | assert(message); | |
499 | assert(ret); | |
500 | ||
501 | /* check for link kind */ | |
502 | r = sd_netlink_message_enter_container(message, IFLA_LINKINFO); | |
503 | if (r == 0) { | |
504 | (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind); | |
505 | r = sd_netlink_message_exit_container(message); | |
506 | if (r < 0) | |
507 | return r; | |
508 | } | |
509 | ||
510 | r = sd_netlink_message_get_type(message, &type); | |
511 | if (r < 0) | |
512 | return r; | |
513 | else if (type != RTM_NEWLINK) | |
514 | return -EINVAL; | |
515 | ||
516 | r = sd_rtnl_message_link_get_ifindex(message, &ifindex); | |
517 | if (r < 0) | |
518 | return r; | |
519 | else if (ifindex <= 0) | |
520 | return -EINVAL; | |
521 | ||
522 | r = sd_rtnl_message_link_get_type(message, &iftype); | |
523 | if (r < 0) | |
524 | return r; | |
525 | ||
526 | r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname); | |
527 | if (r < 0) | |
528 | return r; | |
529 | ||
530 | link = new(Link, 1); | |
531 | if (!link) | |
532 | return -ENOMEM; | |
533 | ||
534 | *link = (Link) { | |
535 | .n_ref = 1, | |
536 | .manager = manager, | |
537 | .state = LINK_STATE_PENDING, | |
538 | .rtnl_extended_attrs = true, | |
539 | .ifindex = ifindex, | |
540 | .iftype = iftype, | |
541 | }; | |
542 | ||
543 | link->ifname = strdup(ifname); | |
544 | if (!link->ifname) | |
545 | return -ENOMEM; | |
546 | ||
547 | if (kind) { | |
548 | link->kind = strdup(kind); | |
549 | if (!link->kind) | |
550 | return -ENOMEM; | |
551 | } | |
552 | ||
553 | r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex); | |
554 | if (r < 0) | |
555 | log_link_debug_errno(link, r, "New device has no master, continuing without"); | |
556 | ||
557 | r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac); | |
558 | if (r < 0) | |
559 | log_link_debug_errno(link, r, "MAC address not found for new device, continuing without"); | |
560 | ||
561 | if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0) | |
562 | return -ENOMEM; | |
563 | ||
564 | if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0) | |
565 | return -ENOMEM; | |
566 | ||
567 | if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0) | |
568 | return -ENOMEM; | |
569 | ||
570 | r = hashmap_ensure_allocated(&manager->links, NULL); | |
571 | if (r < 0) | |
572 | return r; | |
573 | ||
574 | r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link); | |
575 | if (r < 0) | |
576 | return r; | |
577 | ||
578 | r = link_update_flags(link, message, false); | |
579 | if (r < 0) | |
580 | return r; | |
581 | ||
582 | *ret = TAKE_PTR(link); | |
583 | ||
584 | return 0; | |
585 | } | |
586 | ||
587 | static Link *link_free(Link *link) { | |
588 | Address *address; | |
589 | ||
590 | assert(link); | |
591 | ||
592 | link->routes = set_free_with_destructor(link->routes, route_free); | |
593 | link->routes_foreign = set_free_with_destructor(link->routes_foreign, route_free); | |
594 | ||
595 | link->addresses = set_free_with_destructor(link->addresses, address_free); | |
596 | link->addresses_foreign = set_free_with_destructor(link->addresses_foreign, address_free); | |
597 | ||
598 | while ((address = link->pool_addresses)) { | |
599 | LIST_REMOVE(addresses, link->pool_addresses, address); | |
600 | address_free(address); | |
601 | } | |
602 | ||
603 | sd_dhcp_server_unref(link->dhcp_server); | |
604 | sd_dhcp_client_unref(link->dhcp_client); | |
605 | sd_dhcp_lease_unref(link->dhcp_lease); | |
606 | ||
607 | link_lldp_emit_stop(link); | |
608 | ||
609 | free(link->lease_file); | |
610 | ||
611 | sd_lldp_unref(link->lldp); | |
612 | free(link->lldp_file); | |
613 | ||
614 | ndisc_flush(link); | |
615 | ||
616 | sd_ipv4ll_unref(link->ipv4ll); | |
617 | sd_dhcp6_client_unref(link->dhcp6_client); | |
618 | sd_ndisc_unref(link->ndisc); | |
619 | sd_radv_unref(link->radv); | |
620 | ||
621 | free(link->ifname); | |
622 | free(link->kind); | |
623 | ||
624 | (void) unlink(link->state_file); | |
625 | free(link->state_file); | |
626 | ||
627 | sd_device_unref(link->sd_device); | |
628 | ||
629 | hashmap_free(link->bound_to_links); | |
630 | hashmap_free(link->bound_by_links); | |
631 | ||
632 | set_free_with_destructor(link->slaves, link_unref); | |
633 | ||
634 | network_unref(link->network); | |
635 | ||
636 | return mfree(link); | |
637 | } | |
638 | ||
639 | DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free); | |
640 | ||
641 | int link_get(Manager *m, int ifindex, Link **ret) { | |
642 | Link *link; | |
643 | ||
644 | assert(m); | |
645 | assert(ifindex); | |
646 | assert(ret); | |
647 | ||
648 | link = hashmap_get(m->links, INT_TO_PTR(ifindex)); | |
649 | if (!link) | |
650 | return -ENODEV; | |
651 | ||
652 | *ret = link; | |
653 | ||
654 | return 0; | |
655 | } | |
656 | ||
657 | void link_set_state(Link *link, LinkState state) { | |
658 | assert(link); | |
659 | ||
660 | if (link->state == state) | |
661 | return; | |
662 | ||
663 | log_link_debug(link, "State changed: %s -> %s", | |
664 | link_state_to_string(link->state), | |
665 | link_state_to_string(state)); | |
666 | ||
667 | link->state = state; | |
668 | ||
669 | link_send_changed(link, "AdministrativeState", NULL); | |
670 | } | |
671 | ||
672 | static void link_enter_unmanaged(Link *link) { | |
673 | assert(link); | |
674 | ||
675 | link_set_state(link, LINK_STATE_UNMANAGED); | |
676 | ||
677 | link_dirty(link); | |
678 | } | |
679 | ||
680 | int link_stop_clients(Link *link) { | |
681 | int r = 0, k; | |
682 | ||
683 | assert(link); | |
684 | assert(link->manager); | |
685 | assert(link->manager->event); | |
686 | ||
687 | if (link->dhcp_client) { | |
688 | k = sd_dhcp_client_stop(link->dhcp_client); | |
689 | if (k < 0) | |
690 | r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m"); | |
691 | } | |
692 | ||
693 | if (link->ipv4ll) { | |
694 | k = sd_ipv4ll_stop(link->ipv4ll); | |
695 | if (k < 0) | |
696 | r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m"); | |
697 | } | |
698 | ||
699 | if (link->dhcp6_client) { | |
700 | k = sd_dhcp6_client_stop(link->dhcp6_client); | |
701 | if (k < 0) | |
702 | r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m"); | |
703 | } | |
704 | ||
705 | if (link->ndisc) { | |
706 | k = sd_ndisc_stop(link->ndisc); | |
707 | if (k < 0) | |
708 | r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m"); | |
709 | } | |
710 | ||
711 | if (link->radv) { | |
712 | k = sd_radv_stop(link->radv); | |
713 | if (k < 0) | |
714 | r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m"); | |
715 | } | |
716 | ||
717 | link_lldp_emit_stop(link); | |
718 | return r; | |
719 | } | |
720 | ||
721 | void link_enter_failed(Link *link) { | |
722 | assert(link); | |
723 | ||
724 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
725 | return; | |
726 | ||
727 | log_link_warning(link, "Failed"); | |
728 | ||
729 | link_set_state(link, LINK_STATE_FAILED); | |
730 | ||
731 | link_stop_clients(link); | |
732 | ||
733 | link_dirty(link); | |
734 | } | |
735 | ||
736 | static Address* link_find_dhcp_server_address(Link *link) { | |
737 | Address *address; | |
738 | ||
739 | assert(link); | |
740 | assert(link->network); | |
741 | ||
742 | /* The first statically configured address if there is any */ | |
743 | LIST_FOREACH(addresses, address, link->network->static_addresses) { | |
744 | ||
745 | if (address->family != AF_INET) | |
746 | continue; | |
747 | ||
748 | if (in_addr_is_null(address->family, &address->in_addr)) | |
749 | continue; | |
750 | ||
751 | return address; | |
752 | } | |
753 | ||
754 | /* If that didn't work, find a suitable address we got from the pool */ | |
755 | LIST_FOREACH(addresses, address, link->pool_addresses) { | |
756 | if (address->family != AF_INET) | |
757 | continue; | |
758 | ||
759 | return address; | |
760 | } | |
761 | ||
762 | return NULL; | |
763 | } | |
764 | ||
765 | static int link_join_netdevs_after_configured(Link *link) { | |
766 | NetDev *netdev; | |
767 | Iterator i; | |
768 | int r; | |
769 | ||
770 | HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) { | |
771 | if (netdev->ifindex > 0) | |
772 | /* Assume already enslaved. */ | |
773 | continue; | |
774 | ||
775 | if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED) | |
776 | continue; | |
777 | ||
778 | log_struct(LOG_DEBUG, | |
779 | LOG_LINK_INTERFACE(link), | |
780 | LOG_NETDEV_INTERFACE(netdev), | |
781 | LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname)); | |
782 | ||
783 | r = netdev_join(netdev, link, NULL); | |
784 | if (r < 0) | |
785 | return log_struct_errno(LOG_WARNING, r, | |
786 | LOG_LINK_INTERFACE(link), | |
787 | LOG_NETDEV_INTERFACE(netdev), | |
788 | LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname)); | |
789 | } | |
790 | ||
791 | return 0; | |
792 | } | |
793 | ||
794 | static void link_enter_configured(Link *link) { | |
795 | assert(link); | |
796 | assert(link->network); | |
797 | ||
798 | if (link->state != LINK_STATE_CONFIGURING) | |
799 | return; | |
800 | ||
801 | log_link_info(link, "Configured"); | |
802 | ||
803 | link_set_state(link, LINK_STATE_CONFIGURED); | |
804 | ||
805 | (void) link_join_netdevs_after_configured(link); | |
806 | ||
807 | link_dirty(link); | |
808 | } | |
809 | ||
810 | static int link_request_set_routing_policy_rule(Link *link) { | |
811 | RoutingPolicyRule *rule, *rrule = NULL; | |
812 | int r; | |
813 | ||
814 | assert(link); | |
815 | assert(link->network); | |
816 | ||
817 | link_set_state(link, LINK_STATE_CONFIGURING); | |
818 | link->routing_policy_rules_configured = false; | |
819 | ||
820 | LIST_FOREACH(rules, rule, link->network->rules) { | |
821 | r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to, | |
822 | rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif, | |
823 | rule->protocol, &rule->sport, &rule->dport, &rrule); | |
824 | if (r == 0) { | |
825 | (void) routing_policy_rule_make_local(link->manager, rrule); | |
826 | continue; | |
827 | } | |
828 | ||
829 | r = routing_policy_rule_configure(rule, link, NULL, false); | |
830 | if (r < 0) { | |
831 | log_link_warning_errno(link, r, "Could not set routing policy rules: %m"); | |
832 | link_enter_failed(link); | |
833 | return r; | |
834 | } | |
835 | ||
836 | link->routing_policy_rule_messages++; | |
837 | } | |
838 | ||
839 | routing_policy_rule_purge(link->manager, link); | |
840 | if (link->routing_policy_rule_messages == 0) { | |
841 | link->routing_policy_rules_configured = true; | |
842 | link_check_ready(link); | |
843 | } else | |
844 | log_link_debug(link, "Setting routing policy rules"); | |
845 | ||
846 | return 0; | |
847 | } | |
848 | ||
849 | static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { | |
850 | int r; | |
851 | ||
852 | assert(link); | |
853 | assert(link->route_messages > 0); | |
854 | assert(IN_SET(link->state, LINK_STATE_CONFIGURING, | |
855 | LINK_STATE_FAILED, LINK_STATE_LINGER)); | |
856 | ||
857 | link->route_messages--; | |
858 | ||
859 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
860 | return 1; | |
861 | ||
862 | r = sd_netlink_message_get_errno(m); | |
863 | if (r < 0 && r != -EEXIST) | |
864 | log_link_warning_errno(link, r, "Could not set route: %m"); | |
865 | ||
866 | if (link->route_messages == 0) { | |
867 | log_link_debug(link, "Routes set"); | |
868 | link->static_routes_configured = true; | |
869 | link_check_ready(link); | |
870 | } | |
871 | ||
872 | return 1; | |
873 | } | |
874 | ||
875 | int link_request_set_routes(Link *link) { | |
876 | enum { | |
877 | PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */ | |
878 | PHASE_GATEWAY, /* Second phase: Routes with a gateway */ | |
879 | _PHASE_MAX | |
880 | } phase; | |
881 | Route *rt; | |
882 | int r; | |
883 | ||
884 | assert(link); | |
885 | assert(link->network); | |
886 | assert(link->addresses_configured); | |
887 | assert(link->address_messages == 0); | |
888 | assert(link->state != _LINK_STATE_INVALID); | |
889 | ||
890 | link_set_state(link, LINK_STATE_CONFIGURING); | |
891 | link->static_routes_configured = false; | |
892 | ||
893 | r = link_request_set_routing_policy_rule(link); | |
894 | if (r < 0) | |
895 | return r; | |
896 | ||
897 | /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */ | |
898 | for (phase = 0; phase < _PHASE_MAX; phase++) | |
899 | LIST_FOREACH(routes, rt, link->network->static_routes) { | |
900 | ||
901 | if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY)) | |
902 | continue; | |
903 | ||
904 | r = route_configure(rt, link, route_handler); | |
905 | if (r < 0) { | |
906 | log_link_warning_errno(link, r, "Could not set routes: %m"); | |
907 | link_enter_failed(link); | |
908 | return r; | |
909 | } | |
910 | ||
911 | link->route_messages++; | |
912 | } | |
913 | ||
914 | if (link->route_messages == 0) { | |
915 | link->static_routes_configured = true; | |
916 | link_check_ready(link); | |
917 | } else | |
918 | log_link_debug(link, "Setting routes"); | |
919 | ||
920 | return 0; | |
921 | } | |
922 | ||
923 | void link_check_ready(Link *link) { | |
924 | Address *a; | |
925 | Iterator i; | |
926 | ||
927 | assert(link); | |
928 | ||
929 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
930 | return; | |
931 | ||
932 | if (!link->network) | |
933 | return; | |
934 | ||
935 | if (!link->addresses_configured) | |
936 | return; | |
937 | ||
938 | if (!link->neighbors_configured) | |
939 | return; | |
940 | ||
941 | SET_FOREACH(a, link->addresses, i) | |
942 | if (!address_is_ready(a)) | |
943 | return; | |
944 | ||
945 | if (!link->addresses_ready) { | |
946 | link->addresses_ready = true; | |
947 | link_request_set_routes(link); | |
948 | return; | |
949 | } | |
950 | ||
951 | if (!link->static_routes_configured) | |
952 | return; | |
953 | ||
954 | if (!link->routing_policy_rules_configured) | |
955 | return; | |
956 | ||
957 | if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !(link->ipv4ll_address && link->ipv4ll_route)) | |
958 | return; | |
959 | ||
960 | if (link_ipv6ll_enabled(link) && | |
961 | in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) | |
962 | return; | |
963 | ||
964 | if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) && | |
965 | !(link->dhcp4_configured || link->dhcp6_configured) && | |
966 | !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address && link->ipv4ll_route)) | |
967 | /* When DHCP is enabled, at least one protocol must provide an address, or | |
968 | * an IPv4ll fallback address must be configured. */ | |
969 | return; | |
970 | ||
971 | if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured) | |
972 | return; | |
973 | ||
974 | if (link->state != LINK_STATE_CONFIGURED) | |
975 | link_enter_configured(link); | |
976 | ||
977 | return; | |
978 | } | |
979 | ||
980 | static int link_request_set_neighbors(Link *link) { | |
981 | Neighbor *neighbor; | |
982 | int r; | |
983 | ||
984 | assert(link); | |
985 | assert(link->network); | |
986 | assert(link->state != _LINK_STATE_INVALID); | |
987 | ||
988 | link_set_state(link, LINK_STATE_CONFIGURING); | |
989 | link->neighbors_configured = false; | |
990 | ||
991 | LIST_FOREACH(neighbors, neighbor, link->network->neighbors) { | |
992 | r = neighbor_configure(neighbor, link, NULL); | |
993 | if (r < 0) { | |
994 | log_link_warning_errno(link, r, "Could not set neighbor: %m"); | |
995 | link_enter_failed(link); | |
996 | return r; | |
997 | } | |
998 | } | |
999 | ||
1000 | if (link->neighbor_messages == 0) { | |
1001 | link->neighbors_configured = true; | |
1002 | link_check_ready(link); | |
1003 | } else | |
1004 | log_link_debug(link, "Setting neighbors"); | |
1005 | ||
1006 | return 0; | |
1007 | } | |
1008 | ||
1009 | static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { | |
1010 | int r; | |
1011 | ||
1012 | assert(rtnl); | |
1013 | assert(m); | |
1014 | assert(link); | |
1015 | assert(link->ifname); | |
1016 | assert(link->address_messages > 0); | |
1017 | assert(IN_SET(link->state, LINK_STATE_CONFIGURING, | |
1018 | LINK_STATE_FAILED, LINK_STATE_LINGER)); | |
1019 | ||
1020 | link->address_messages--; | |
1021 | ||
1022 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
1023 | return 1; | |
1024 | ||
1025 | r = sd_netlink_message_get_errno(m); | |
1026 | if (r < 0 && r != -EEXIST) | |
1027 | log_link_warning_errno(link, r, "could not set address: %m"); | |
1028 | else if (r >= 0) | |
1029 | manager_rtnl_process_address(rtnl, m, link->manager); | |
1030 | ||
1031 | if (link->address_messages == 0) { | |
1032 | log_link_debug(link, "Addresses set"); | |
1033 | link->addresses_configured = true; | |
1034 | link_check_ready(link); | |
1035 | } | |
1036 | ||
1037 | return 1; | |
1038 | } | |
1039 | ||
1040 | static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) { | |
1041 | _cleanup_free_ struct in_addr *addresses = NULL; | |
1042 | size_t n_addresses = 0, n_allocated = 0; | |
1043 | unsigned i; | |
1044 | ||
1045 | log_debug("Copying DNS server information from %s", link->ifname); | |
1046 | ||
1047 | if (!link->network) | |
1048 | return 0; | |
1049 | ||
1050 | for (i = 0; i < link->network->n_dns; i++) { | |
1051 | struct in_addr ia; | |
1052 | ||
1053 | /* Only look for IPv4 addresses */ | |
1054 | if (link->network->dns[i].family != AF_INET) | |
1055 | continue; | |
1056 | ||
1057 | ia = link->network->dns[i].address.in; | |
1058 | ||
1059 | /* Never propagate obviously borked data */ | |
1060 | if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia)) | |
1061 | continue; | |
1062 | ||
1063 | if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1)) | |
1064 | return log_oom(); | |
1065 | ||
1066 | addresses[n_addresses++] = ia; | |
1067 | } | |
1068 | ||
1069 | if (link->network->dhcp_use_dns && link->dhcp_lease) { | |
1070 | const struct in_addr *da = NULL; | |
1071 | int j, n; | |
1072 | ||
1073 | n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da); | |
1074 | if (n > 0) { | |
1075 | ||
1076 | if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n)) | |
1077 | return log_oom(); | |
1078 | ||
1079 | for (j = 0; j < n; j++) | |
1080 | if (in4_addr_is_non_local(&da[j])) | |
1081 | addresses[n_addresses++] = da[j]; | |
1082 | } | |
1083 | } | |
1084 | ||
1085 | if (n_addresses <= 0) | |
1086 | return 0; | |
1087 | ||
1088 | return sd_dhcp_server_set_dns(s, addresses, n_addresses); | |
1089 | } | |
1090 | ||
1091 | static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) { | |
1092 | _cleanup_free_ struct in_addr *addresses = NULL; | |
1093 | size_t n_addresses = 0, n_allocated = 0; | |
1094 | char **a; | |
1095 | ||
1096 | if (!link->network) | |
1097 | return 0; | |
1098 | ||
1099 | log_debug("Copying NTP server information from %s", link->ifname); | |
1100 | ||
1101 | STRV_FOREACH(a, link->network->ntp) { | |
1102 | union in_addr_union ia; | |
1103 | ||
1104 | /* Only look for IPv4 addresses */ | |
1105 | if (in_addr_from_string(AF_INET, *a, &ia) <= 0) | |
1106 | continue; | |
1107 | ||
1108 | /* Never propagate obviously borked data */ | |
1109 | if (in4_addr_is_null(&ia.in) || in4_addr_is_localhost(&ia.in)) | |
1110 | continue; | |
1111 | ||
1112 | if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1)) | |
1113 | return log_oom(); | |
1114 | ||
1115 | addresses[n_addresses++] = ia.in; | |
1116 | } | |
1117 | ||
1118 | if (link->network->dhcp_use_ntp && link->dhcp_lease) { | |
1119 | const struct in_addr *da = NULL; | |
1120 | int j, n; | |
1121 | ||
1122 | n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da); | |
1123 | if (n > 0) { | |
1124 | ||
1125 | if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n)) | |
1126 | return log_oom(); | |
1127 | ||
1128 | for (j = 0; j < n; j++) | |
1129 | if (in4_addr_is_non_local(&da[j])) | |
1130 | addresses[n_addresses++] = da[j]; | |
1131 | } | |
1132 | } | |
1133 | ||
1134 | if (n_addresses <= 0) | |
1135 | return 0; | |
1136 | ||
1137 | return sd_dhcp_server_set_ntp(s, addresses, n_addresses); | |
1138 | } | |
1139 | ||
1140 | static int link_set_bridge_fdb(Link *link) { | |
1141 | FdbEntry *fdb_entry; | |
1142 | int r; | |
1143 | ||
1144 | LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) { | |
1145 | r = fdb_entry_configure(link, fdb_entry); | |
1146 | if (r < 0) | |
1147 | return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m"); | |
1148 | } | |
1149 | ||
1150 | return 0; | |
1151 | } | |
1152 | ||
1153 | static int link_request_set_addresses(Link *link) { | |
1154 | AddressLabel *label; | |
1155 | Address *ad; | |
1156 | int r; | |
1157 | ||
1158 | assert(link); | |
1159 | assert(link->network); | |
1160 | assert(link->state != _LINK_STATE_INVALID); | |
1161 | ||
1162 | link_set_state(link, LINK_STATE_CONFIGURING); | |
1163 | ||
1164 | /* Reset all *_configured flags we are configuring. */ | |
1165 | link->addresses_configured = false; | |
1166 | link->addresses_ready = false; | |
1167 | link->neighbors_configured = false; | |
1168 | link->static_routes_configured = false; | |
1169 | link->routing_policy_rules_configured = false; | |
1170 | ||
1171 | r = link_set_bridge_fdb(link); | |
1172 | if (r < 0) | |
1173 | return r; | |
1174 | ||
1175 | r = link_request_set_neighbors(link); | |
1176 | if (r < 0) | |
1177 | return r; | |
1178 | ||
1179 | LIST_FOREACH(addresses, ad, link->network->static_addresses) { | |
1180 | bool update; | |
1181 | ||
1182 | update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0; | |
1183 | ||
1184 | r = address_configure(ad, link, address_handler, update); | |
1185 | if (r < 0) { | |
1186 | log_link_warning_errno(link, r, "Could not set addresses: %m"); | |
1187 | link_enter_failed(link); | |
1188 | return r; | |
1189 | } | |
1190 | ||
1191 | link->address_messages++; | |
1192 | } | |
1193 | ||
1194 | LIST_FOREACH(labels, label, link->network->address_labels) { | |
1195 | r = address_label_configure(label, link, NULL, false); | |
1196 | if (r < 0) { | |
1197 | log_link_warning_errno(link, r, "Could not set address label: %m"); | |
1198 | link_enter_failed(link); | |
1199 | return r; | |
1200 | } | |
1201 | ||
1202 | link->address_label_messages++; | |
1203 | } | |
1204 | ||
1205 | /* now that we can figure out a default address for the dhcp server, | |
1206 | start it */ | |
1207 | if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) { | |
1208 | Address *address; | |
1209 | Link *uplink = NULL; | |
1210 | bool acquired_uplink = false; | |
1211 | ||
1212 | address = link_find_dhcp_server_address(link); | |
1213 | if (!address) { | |
1214 | log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance."); | |
1215 | link_enter_failed(link); | |
1216 | return 0; | |
1217 | } | |
1218 | ||
1219 | /* use the server address' subnet as the pool */ | |
1220 | r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen, | |
1221 | link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size); | |
1222 | if (r < 0) | |
1223 | return r; | |
1224 | ||
1225 | /* TODO: | |
1226 | r = sd_dhcp_server_set_router(link->dhcp_server, | |
1227 | &main_address->in_addr.in); | |
1228 | if (r < 0) | |
1229 | return r; | |
1230 | */ | |
1231 | ||
1232 | if (link->network->dhcp_server_max_lease_time_usec > 0) { | |
1233 | r = sd_dhcp_server_set_max_lease_time( | |
1234 | link->dhcp_server, | |
1235 | DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC)); | |
1236 | if (r < 0) | |
1237 | return r; | |
1238 | } | |
1239 | ||
1240 | if (link->network->dhcp_server_default_lease_time_usec > 0) { | |
1241 | r = sd_dhcp_server_set_default_lease_time( | |
1242 | link->dhcp_server, | |
1243 | DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC)); | |
1244 | if (r < 0) | |
1245 | return r; | |
1246 | } | |
1247 | ||
1248 | if (link->network->dhcp_server_emit_dns) { | |
1249 | ||
1250 | if (link->network->n_dhcp_server_dns > 0) | |
1251 | r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns); | |
1252 | else { | |
1253 | uplink = manager_find_uplink(link->manager, link); | |
1254 | acquired_uplink = true; | |
1255 | ||
1256 | if (!uplink) { | |
1257 | log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink."); | |
1258 | r = 0; | |
1259 | } else | |
1260 | r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server); | |
1261 | } | |
1262 | if (r < 0) | |
1263 | log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m"); | |
1264 | } | |
1265 | ||
1266 | if (link->network->dhcp_server_emit_ntp) { | |
1267 | ||
1268 | if (link->network->n_dhcp_server_ntp > 0) | |
1269 | r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp); | |
1270 | else { | |
1271 | if (!acquired_uplink) | |
1272 | uplink = manager_find_uplink(link->manager, link); | |
1273 | ||
1274 | if (!uplink) { | |
1275 | log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink."); | |
1276 | r = 0; | |
1277 | } else | |
1278 | r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server); | |
1279 | ||
1280 | } | |
1281 | if (r < 0) | |
1282 | log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m"); | |
1283 | } | |
1284 | ||
1285 | r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router); | |
1286 | if (r < 0) | |
1287 | return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m"); | |
1288 | ||
1289 | if (link->network->dhcp_server_emit_timezone) { | |
1290 | _cleanup_free_ char *buffer = NULL; | |
1291 | const char *tz = NULL; | |
1292 | ||
1293 | if (link->network->dhcp_server_timezone) | |
1294 | tz = link->network->dhcp_server_timezone; | |
1295 | else { | |
1296 | r = get_timezone(&buffer); | |
1297 | if (r < 0) | |
1298 | log_warning_errno(r, "Failed to determine timezone: %m"); | |
1299 | else | |
1300 | tz = buffer; | |
1301 | } | |
1302 | ||
1303 | if (tz) { | |
1304 | r = sd_dhcp_server_set_timezone(link->dhcp_server, tz); | |
1305 | if (r < 0) | |
1306 | return r; | |
1307 | } | |
1308 | } | |
1309 | if (!sd_dhcp_server_is_running(link->dhcp_server)) { | |
1310 | r = sd_dhcp_server_start(link->dhcp_server); | |
1311 | if (r < 0) { | |
1312 | log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m"); | |
1313 | ||
1314 | link_enter_failed(link); | |
1315 | ||
1316 | return 0; | |
1317 | } | |
1318 | } | |
1319 | ||
1320 | log_link_debug(link, "Offering DHCPv4 leases"); | |
1321 | } | |
1322 | ||
1323 | if (link->address_messages == 0) { | |
1324 | link->addresses_configured = true; | |
1325 | link_check_ready(link); | |
1326 | } else | |
1327 | log_link_debug(link, "Setting addresses"); | |
1328 | ||
1329 | return 0; | |
1330 | } | |
1331 | ||
1332 | static int link_set_bridge_vlan(Link *link) { | |
1333 | int r; | |
1334 | ||
1335 | r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap); | |
1336 | if (r < 0) | |
1337 | log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m"); | |
1338 | ||
1339 | return r; | |
1340 | } | |
1341 | ||
1342 | static int link_set_proxy_arp(Link *link) { | |
1343 | int r; | |
1344 | ||
1345 | if (!link_proxy_arp_enabled(link)) | |
1346 | return 0; | |
1347 | ||
1348 | r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0); | |
1349 | if (r < 0) | |
1350 | log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m"); | |
1351 | ||
1352 | return 0; | |
1353 | } | |
1354 | ||
1355 | static int link_configure_after_setting_mtu(Link *link); | |
1356 | ||
1357 | static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { | |
1358 | int r; | |
1359 | ||
1360 | assert(m); | |
1361 | assert(link); | |
1362 | assert(link->ifname); | |
1363 | ||
1364 | link->setting_mtu = false; | |
1365 | ||
1366 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
1367 | return 1; | |
1368 | ||
1369 | r = sd_netlink_message_get_errno(m); | |
1370 | if (r < 0) { | |
1371 | log_link_warning_errno(link, r, "Could not set MTU: %m"); | |
1372 | return 1; | |
1373 | } | |
1374 | ||
1375 | log_link_debug(link, "Setting MTU done."); | |
1376 | ||
1377 | if (link->state == LINK_STATE_INITIALIZED) | |
1378 | (void) link_configure_after_setting_mtu(link); | |
1379 | ||
1380 | return 1; | |
1381 | } | |
1382 | ||
1383 | int link_set_mtu(Link *link, uint32_t mtu) { | |
1384 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; | |
1385 | int r; | |
1386 | ||
1387 | assert(link); | |
1388 | assert(link->manager); | |
1389 | assert(link->manager->rtnl); | |
1390 | ||
1391 | if (mtu == 0 || link->setting_mtu) | |
1392 | return 0; | |
1393 | ||
1394 | if (link->mtu == mtu) | |
1395 | return 0; | |
1396 | ||
1397 | log_link_debug(link, "Setting MTU: %" PRIu32, mtu); | |
1398 | ||
1399 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex); | |
1400 | if (r < 0) | |
1401 | return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m"); | |
1402 | ||
1403 | /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled) | |
1404 | * for this interface, then disable IPv6 else enable it. */ | |
1405 | (void) link_enable_ipv6(link); | |
1406 | ||
1407 | /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes | |
1408 | * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */ | |
1409 | if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) { | |
1410 | ||
1411 | log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as " | |
1412 | "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m"); | |
1413 | ||
1414 | mtu = IPV6_MIN_MTU; | |
1415 | } | |
1416 | ||
1417 | r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu); | |
1418 | if (r < 0) | |
1419 | return log_link_error_errno(link, r, "Could not append MTU: %m"); | |
1420 | ||
1421 | r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler, | |
1422 | link_netlink_destroy_callback, link); | |
1423 | if (r < 0) | |
1424 | return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); | |
1425 | ||
1426 | link_ref(link); | |
1427 | link->setting_mtu = true; | |
1428 | ||
1429 | return 0; | |
1430 | } | |
1431 | ||
1432 | static bool link_reduces_vlan_mtu(Link *link) { | |
1433 | /* See netif_reduces_vlan_mtu() in kernel. */ | |
1434 | return streq_ptr(link->kind, "macsec"); | |
1435 | } | |
1436 | ||
1437 | static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) { | |
1438 | uint32_t mtu = 0; | |
1439 | NetDev *dev; | |
1440 | Iterator i; | |
1441 | ||
1442 | HASHMAP_FOREACH(dev, link->network->stacked_netdevs, i) | |
1443 | if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0) | |
1444 | /* See vlan_dev_change_mtu() in kernel. */ | |
1445 | mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu); | |
1446 | ||
1447 | else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu) | |
1448 | /* See macvlan_change_mtu() in kernel. */ | |
1449 | mtu = dev->mtu; | |
1450 | ||
1451 | return mtu; | |
1452 | } | |
1453 | ||
1454 | static int link_configure_mtu(Link *link) { | |
1455 | uint32_t mtu; | |
1456 | ||
1457 | assert(link); | |
1458 | assert(link->network); | |
1459 | ||
1460 | if (link->network->mtu > 0) | |
1461 | return link_set_mtu(link, link->network->mtu); | |
1462 | ||
1463 | mtu = link_get_requested_mtu_by_stacked_netdevs(link); | |
1464 | if (link->mtu >= mtu) | |
1465 | return 0; | |
1466 | ||
1467 | log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. " | |
1468 | "If it is not desired, then please explicitly specify MTUBytes= setting.", | |
1469 | link->mtu, mtu); | |
1470 | ||
1471 | return link_set_mtu(link, mtu); | |
1472 | } | |
1473 | ||
1474 | static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { | |
1475 | int r; | |
1476 | ||
1477 | assert(m); | |
1478 | assert(link); | |
1479 | assert(link->ifname); | |
1480 | ||
1481 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
1482 | return 1; | |
1483 | ||
1484 | r = sd_netlink_message_get_errno(m); | |
1485 | if (r < 0) | |
1486 | log_link_warning_errno(link, r, "Could not set link flags: %m"); | |
1487 | ||
1488 | return 1; | |
1489 | } | |
1490 | ||
1491 | static int link_set_flags(Link *link) { | |
1492 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; | |
1493 | unsigned ifi_change = 0; | |
1494 | unsigned ifi_flags = 0; | |
1495 | int r; | |
1496 | ||
1497 | assert(link); | |
1498 | assert(link->manager); | |
1499 | assert(link->manager->rtnl); | |
1500 | ||
1501 | if (link->flags & IFF_LOOPBACK) | |
1502 | return 0; | |
1503 | ||
1504 | if (!link->network) | |
1505 | return 0; | |
1506 | ||
1507 | if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0) | |
1508 | return 0; | |
1509 | ||
1510 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex); | |
1511 | if (r < 0) | |
1512 | return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m"); | |
1513 | ||
1514 | if (link->network->arp >= 0) { | |
1515 | ifi_change |= IFF_NOARP; | |
1516 | SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0); | |
1517 | } | |
1518 | ||
1519 | if (link->network->multicast >= 0) { | |
1520 | ifi_change |= IFF_MULTICAST; | |
1521 | SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast); | |
1522 | } | |
1523 | ||
1524 | if (link->network->allmulticast >= 0) { | |
1525 | ifi_change |= IFF_ALLMULTI; | |
1526 | SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast); | |
1527 | } | |
1528 | ||
1529 | r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change); | |
1530 | if (r < 0) | |
1531 | return log_link_error_errno(link, r, "Could not set link flags: %m"); | |
1532 | ||
1533 | r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler, | |
1534 | link_netlink_destroy_callback, link); | |
1535 | if (r < 0) | |
1536 | return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); | |
1537 | ||
1538 | link_ref(link); | |
1539 | ||
1540 | return 0; | |
1541 | } | |
1542 | ||
1543 | static int link_acquire_ipv6_conf(Link *link) { | |
1544 | int r; | |
1545 | ||
1546 | assert(link); | |
1547 | ||
1548 | if (link_ipv6_accept_ra_enabled(link)) { | |
1549 | assert(link->ndisc); | |
1550 | ||
1551 | log_link_debug(link, "Discovering IPv6 routers"); | |
1552 | ||
1553 | r = sd_ndisc_start(link->ndisc); | |
1554 | if (r < 0 && r != -EBUSY) | |
1555 | return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m"); | |
1556 | } | |
1557 | ||
1558 | if (link_radv_enabled(link)) { | |
1559 | assert(link->radv); | |
1560 | assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0); | |
1561 | ||
1562 | log_link_debug(link, "Starting IPv6 Router Advertisements"); | |
1563 | ||
1564 | r = sd_radv_start(link->radv); | |
1565 | if (r < 0 && r != -EBUSY) | |
1566 | return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m"); | |
1567 | } | |
1568 | ||
1569 | (void) dhcp6_request_prefix_delegation(link); | |
1570 | ||
1571 | return 0; | |
1572 | } | |
1573 | ||
1574 | static int link_acquire_ipv4_conf(Link *link) { | |
1575 | int r; | |
1576 | ||
1577 | assert(link); | |
1578 | assert(link->manager); | |
1579 | assert(link->manager->event); | |
1580 | ||
1581 | if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) { | |
1582 | assert(link->ipv4ll); | |
1583 | ||
1584 | log_link_debug(link, "Acquiring IPv4 link-local address"); | |
1585 | ||
1586 | r = sd_ipv4ll_start(link->ipv4ll); | |
1587 | if (r < 0) | |
1588 | return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m"); | |
1589 | } | |
1590 | ||
1591 | if (link_dhcp4_enabled(link)) { | |
1592 | assert(link->dhcp_client); | |
1593 | ||
1594 | log_link_debug(link, "Acquiring DHCPv4 lease"); | |
1595 | ||
1596 | r = sd_dhcp_client_start(link->dhcp_client); | |
1597 | if (r < 0) | |
1598 | return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m"); | |
1599 | } | |
1600 | ||
1601 | return 0; | |
1602 | } | |
1603 | ||
1604 | static int link_acquire_conf(Link *link) { | |
1605 | int r; | |
1606 | ||
1607 | assert(link); | |
1608 | ||
1609 | r = link_acquire_ipv4_conf(link); | |
1610 | if (r < 0) | |
1611 | return r; | |
1612 | ||
1613 | if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) { | |
1614 | r = link_acquire_ipv6_conf(link); | |
1615 | if (r < 0) | |
1616 | return r; | |
1617 | } | |
1618 | ||
1619 | if (link_lldp_emit_enabled(link)) { | |
1620 | r = link_lldp_emit_start(link); | |
1621 | if (r < 0) | |
1622 | return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m"); | |
1623 | } | |
1624 | ||
1625 | return 0; | |
1626 | } | |
1627 | ||
1628 | bool link_has_carrier(Link *link) { | |
1629 | /* see Documentation/networking/operstates.txt in the kernel sources */ | |
1630 | ||
1631 | if (link->kernel_operstate == IF_OPER_UP) | |
1632 | return true; | |
1633 | ||
1634 | if (link->kernel_operstate == IF_OPER_UNKNOWN) | |
1635 | /* operstate may not be implemented, so fall back to flags */ | |
1636 | if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) && | |
1637 | !FLAGS_SET(link->flags, IFF_DORMANT)) | |
1638 | return true; | |
1639 | ||
1640 | return false; | |
1641 | } | |
1642 | ||
1643 | static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { | |
1644 | int r; | |
1645 | ||
1646 | assert(link); | |
1647 | ||
1648 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
1649 | return 1; | |
1650 | ||
1651 | r = sd_netlink_message_get_errno(m); | |
1652 | if (r < 0) | |
1653 | log_link_warning_errno(link, r, "Could not set address genmode for interface: %m"); | |
1654 | ||
1655 | return 1; | |
1656 | } | |
1657 | ||
1658 | static int link_configure_addrgen_mode(Link *link) { | |
1659 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; | |
1660 | uint8_t ipv6ll_mode; | |
1661 | int r; | |
1662 | ||
1663 | assert(link); | |
1664 | assert(link->network); | |
1665 | assert(link->manager); | |
1666 | assert(link->manager->rtnl); | |
1667 | ||
1668 | if (!socket_ipv6_is_supported()) | |
1669 | return 0; | |
1670 | ||
1671 | log_link_debug(link, "Setting address genmode for link"); | |
1672 | ||
1673 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex); | |
1674 | if (r < 0) | |
1675 | return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m"); | |
1676 | ||
1677 | r = sd_netlink_message_open_container(req, IFLA_AF_SPEC); | |
1678 | if (r < 0) | |
1679 | return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m"); | |
1680 | ||
1681 | r = sd_netlink_message_open_container(req, AF_INET6); | |
1682 | if (r < 0) | |
1683 | return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m"); | |
1684 | ||
1685 | if (!link_ipv6ll_enabled(link)) | |
1686 | ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE; | |
1687 | else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0) | |
1688 | /* The file may not exist. And event if it exists, when stable_secret is unset, | |
1689 | * reading the file fails with EIO. */ | |
1690 | ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64; | |
1691 | else | |
1692 | ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY; | |
1693 | ||
1694 | r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode); | |
1695 | if (r < 0) | |
1696 | return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m"); | |
1697 | ||
1698 | r = sd_netlink_message_close_container(req); | |
1699 | if (r < 0) | |
1700 | return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m"); | |
1701 | ||
1702 | r = sd_netlink_message_close_container(req); | |
1703 | if (r < 0) | |
1704 | return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m"); | |
1705 | ||
1706 | r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler, | |
1707 | link_netlink_destroy_callback, link); | |
1708 | if (r < 0) | |
1709 | return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); | |
1710 | ||
1711 | link_ref(link); | |
1712 | ||
1713 | return 0; | |
1714 | } | |
1715 | ||
1716 | static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { | |
1717 | int r; | |
1718 | ||
1719 | assert(link); | |
1720 | ||
1721 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
1722 | return 1; | |
1723 | ||
1724 | r = sd_netlink_message_get_errno(m); | |
1725 | if (r < 0) | |
1726 | /* we warn but don't fail the link, as it may be brought up later */ | |
1727 | log_link_warning_errno(link, r, "Could not bring up interface: %m"); | |
1728 | ||
1729 | return 1; | |
1730 | } | |
1731 | ||
1732 | static int link_up(Link *link) { | |
1733 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; | |
1734 | int r; | |
1735 | ||
1736 | assert(link); | |
1737 | assert(link->network); | |
1738 | assert(link->manager); | |
1739 | assert(link->manager->rtnl); | |
1740 | ||
1741 | log_link_debug(link, "Bringing link up"); | |
1742 | ||
1743 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex); | |
1744 | if (r < 0) | |
1745 | return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m"); | |
1746 | ||
1747 | /* set it free if not enslaved with networkd */ | |
1748 | if (!link->network->bridge && !link->network->bond && !link->network->vrf) { | |
1749 | r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0); | |
1750 | if (r < 0) | |
1751 | return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m"); | |
1752 | } | |
1753 | ||
1754 | r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP); | |
1755 | if (r < 0) | |
1756 | return log_link_error_errno(link, r, "Could not set link flags: %m"); | |
1757 | ||
1758 | if (link->network->mac) { | |
1759 | r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac); | |
1760 | if (r < 0) | |
1761 | return log_link_error_errno(link, r, "Could not set MAC address: %m"); | |
1762 | } | |
1763 | ||
1764 | r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler, | |
1765 | link_netlink_destroy_callback, link); | |
1766 | if (r < 0) | |
1767 | return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); | |
1768 | ||
1769 | link_ref(link); | |
1770 | ||
1771 | return 0; | |
1772 | } | |
1773 | ||
1774 | static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { | |
1775 | int r; | |
1776 | ||
1777 | assert(link); | |
1778 | ||
1779 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
1780 | return 1; | |
1781 | ||
1782 | r = sd_netlink_message_get_errno(m); | |
1783 | if (r < 0) | |
1784 | log_link_warning_errno(link, r, "Could not bring down interface: %m"); | |
1785 | ||
1786 | return 1; | |
1787 | } | |
1788 | ||
1789 | int link_down(Link *link, link_netlink_message_handler_t callback) { | |
1790 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; | |
1791 | int r; | |
1792 | ||
1793 | assert(link); | |
1794 | assert(link->manager); | |
1795 | assert(link->manager->rtnl); | |
1796 | ||
1797 | log_link_debug(link, "Bringing link down"); | |
1798 | ||
1799 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, | |
1800 | RTM_SETLINK, link->ifindex); | |
1801 | if (r < 0) | |
1802 | return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m"); | |
1803 | ||
1804 | r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP); | |
1805 | if (r < 0) | |
1806 | return log_link_error_errno(link, r, "Could not set link flags: %m"); | |
1807 | ||
1808 | r = netlink_call_async(link->manager->rtnl, NULL, req, | |
1809 | callback ?: link_down_handler, | |
1810 | link_netlink_destroy_callback, link); | |
1811 | if (r < 0) | |
1812 | return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); | |
1813 | ||
1814 | link_ref(link); | |
1815 | ||
1816 | return 0; | |
1817 | } | |
1818 | ||
1819 | static int link_handle_bound_to_list(Link *link) { | |
1820 | Link *l; | |
1821 | Iterator i; | |
1822 | int r; | |
1823 | bool required_up = false; | |
1824 | bool link_is_up = false; | |
1825 | ||
1826 | assert(link); | |
1827 | ||
1828 | if (hashmap_isempty(link->bound_to_links)) | |
1829 | return 0; | |
1830 | ||
1831 | if (link->flags & IFF_UP) | |
1832 | link_is_up = true; | |
1833 | ||
1834 | HASHMAP_FOREACH (l, link->bound_to_links, i) | |
1835 | if (link_has_carrier(l)) { | |
1836 | required_up = true; | |
1837 | break; | |
1838 | } | |
1839 | ||
1840 | if (!required_up && link_is_up) { | |
1841 | r = link_down(link, NULL); | |
1842 | if (r < 0) | |
1843 | return r; | |
1844 | } else if (required_up && !link_is_up) { | |
1845 | r = link_up(link); | |
1846 | if (r < 0) | |
1847 | return r; | |
1848 | } | |
1849 | ||
1850 | return 0; | |
1851 | } | |
1852 | ||
1853 | static int link_handle_bound_by_list(Link *link) { | |
1854 | Iterator i; | |
1855 | Link *l; | |
1856 | int r; | |
1857 | ||
1858 | assert(link); | |
1859 | ||
1860 | if (hashmap_isempty(link->bound_by_links)) | |
1861 | return 0; | |
1862 | ||
1863 | HASHMAP_FOREACH (l, link->bound_by_links, i) { | |
1864 | r = link_handle_bound_to_list(l); | |
1865 | if (r < 0) | |
1866 | return r; | |
1867 | } | |
1868 | ||
1869 | return 0; | |
1870 | } | |
1871 | ||
1872 | static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) { | |
1873 | int r; | |
1874 | ||
1875 | assert(link); | |
1876 | assert(carrier); | |
1877 | ||
1878 | if (link == carrier) | |
1879 | return 0; | |
1880 | ||
1881 | if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex))) | |
1882 | return 0; | |
1883 | ||
1884 | r = hashmap_ensure_allocated(h, NULL); | |
1885 | if (r < 0) | |
1886 | return r; | |
1887 | ||
1888 | r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier); | |
1889 | if (r < 0) | |
1890 | return r; | |
1891 | ||
1892 | return 0; | |
1893 | } | |
1894 | ||
1895 | static int link_new_bound_by_list(Link *link) { | |
1896 | Manager *m; | |
1897 | Link *carrier; | |
1898 | Iterator i; | |
1899 | int r; | |
1900 | bool list_updated = false; | |
1901 | ||
1902 | assert(link); | |
1903 | assert(link->manager); | |
1904 | ||
1905 | m = link->manager; | |
1906 | ||
1907 | HASHMAP_FOREACH(carrier, m->links, i) { | |
1908 | if (!carrier->network) | |
1909 | continue; | |
1910 | ||
1911 | if (strv_isempty(carrier->network->bind_carrier)) | |
1912 | continue; | |
1913 | ||
1914 | if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) { | |
1915 | r = link_put_carrier(link, carrier, &link->bound_by_links); | |
1916 | if (r < 0) | |
1917 | return r; | |
1918 | ||
1919 | list_updated = true; | |
1920 | } | |
1921 | } | |
1922 | ||
1923 | if (list_updated) | |
1924 | link_dirty(link); | |
1925 | ||
1926 | HASHMAP_FOREACH(carrier, link->bound_by_links, i) { | |
1927 | r = link_put_carrier(carrier, link, &carrier->bound_to_links); | |
1928 | if (r < 0) | |
1929 | return r; | |
1930 | ||
1931 | link_dirty(carrier); | |
1932 | } | |
1933 | ||
1934 | return 0; | |
1935 | } | |
1936 | ||
1937 | static int link_new_bound_to_list(Link *link) { | |
1938 | Manager *m; | |
1939 | Link *carrier; | |
1940 | Iterator i; | |
1941 | int r; | |
1942 | bool list_updated = false; | |
1943 | ||
1944 | assert(link); | |
1945 | assert(link->manager); | |
1946 | ||
1947 | if (!link->network) | |
1948 | return 0; | |
1949 | ||
1950 | if (strv_isempty(link->network->bind_carrier)) | |
1951 | return 0; | |
1952 | ||
1953 | m = link->manager; | |
1954 | ||
1955 | HASHMAP_FOREACH (carrier, m->links, i) { | |
1956 | if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) { | |
1957 | r = link_put_carrier(link, carrier, &link->bound_to_links); | |
1958 | if (r < 0) | |
1959 | return r; | |
1960 | ||
1961 | list_updated = true; | |
1962 | } | |
1963 | } | |
1964 | ||
1965 | if (list_updated) | |
1966 | link_dirty(link); | |
1967 | ||
1968 | HASHMAP_FOREACH (carrier, link->bound_to_links, i) { | |
1969 | r = link_put_carrier(carrier, link, &carrier->bound_by_links); | |
1970 | if (r < 0) | |
1971 | return r; | |
1972 | ||
1973 | link_dirty(carrier); | |
1974 | } | |
1975 | ||
1976 | return 0; | |
1977 | } | |
1978 | ||
1979 | static int link_new_carrier_maps(Link *link) { | |
1980 | int r; | |
1981 | ||
1982 | r = link_new_bound_by_list(link); | |
1983 | if (r < 0) | |
1984 | return r; | |
1985 | ||
1986 | r = link_handle_bound_by_list(link); | |
1987 | if (r < 0) | |
1988 | return r; | |
1989 | ||
1990 | r = link_new_bound_to_list(link); | |
1991 | if (r < 0) | |
1992 | return r; | |
1993 | ||
1994 | r = link_handle_bound_to_list(link); | |
1995 | if (r < 0) | |
1996 | return r; | |
1997 | ||
1998 | return 0; | |
1999 | } | |
2000 | ||
2001 | static void link_free_bound_to_list(Link *link) { | |
2002 | Link *bound_to; | |
2003 | Iterator i; | |
2004 | ||
2005 | HASHMAP_FOREACH (bound_to, link->bound_to_links, i) { | |
2006 | hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex)); | |
2007 | ||
2008 | if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex))) | |
2009 | link_dirty(bound_to); | |
2010 | } | |
2011 | ||
2012 | return; | |
2013 | } | |
2014 | ||
2015 | static void link_free_bound_by_list(Link *link) { | |
2016 | Link *bound_by; | |
2017 | Iterator i; | |
2018 | ||
2019 | HASHMAP_FOREACH (bound_by, link->bound_by_links, i) { | |
2020 | hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex)); | |
2021 | ||
2022 | if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) { | |
2023 | link_dirty(bound_by); | |
2024 | link_handle_bound_to_list(bound_by); | |
2025 | } | |
2026 | } | |
2027 | ||
2028 | return; | |
2029 | } | |
2030 | ||
2031 | static void link_free_carrier_maps(Link *link) { | |
2032 | bool list_updated = false; | |
2033 | ||
2034 | assert(link); | |
2035 | ||
2036 | if (!hashmap_isempty(link->bound_to_links)) { | |
2037 | link_free_bound_to_list(link); | |
2038 | list_updated = true; | |
2039 | } | |
2040 | ||
2041 | if (!hashmap_isempty(link->bound_by_links)) { | |
2042 | link_free_bound_by_list(link); | |
2043 | list_updated = true; | |
2044 | } | |
2045 | ||
2046 | if (list_updated) | |
2047 | link_dirty(link); | |
2048 | ||
2049 | return; | |
2050 | } | |
2051 | ||
2052 | static int link_append_to_master(Link *link, NetDev *netdev) { | |
2053 | Link *master; | |
2054 | int r; | |
2055 | ||
2056 | assert(link); | |
2057 | assert(netdev); | |
2058 | ||
2059 | r = link_get(link->manager, netdev->ifindex, &master); | |
2060 | if (r < 0) | |
2061 | return r; | |
2062 | ||
2063 | r = set_ensure_allocated(&master->slaves, NULL); | |
2064 | if (r < 0) | |
2065 | return r; | |
2066 | ||
2067 | r = set_put(master->slaves, link); | |
2068 | if (r < 0) | |
2069 | return r; | |
2070 | ||
2071 | link_ref(link); | |
2072 | return 0; | |
2073 | } | |
2074 | ||
2075 | static void link_drop_from_master(Link *link, NetDev *netdev) { | |
2076 | Link *master; | |
2077 | ||
2078 | assert(link); | |
2079 | ||
2080 | if (!link->manager || !netdev) | |
2081 | return; | |
2082 | ||
2083 | if (link_get(link->manager, netdev->ifindex, &master) < 0) | |
2084 | return; | |
2085 | ||
2086 | link_unref(set_remove(master->slaves, link)); | |
2087 | } | |
2088 | ||
2089 | static void link_detach_from_manager(Link *link) { | |
2090 | if (!link || !link->manager) | |
2091 | return; | |
2092 | ||
2093 | link_unref(set_remove(link->manager->links_requesting_uuid, link)); | |
2094 | link_clean(link); | |
2095 | ||
2096 | /* The following must be called at last. */ | |
2097 | assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link); | |
2098 | link_unref(link); | |
2099 | } | |
2100 | ||
2101 | void link_drop(Link *link) { | |
2102 | if (!link || link->state == LINK_STATE_LINGER) | |
2103 | return; | |
2104 | ||
2105 | link_set_state(link, LINK_STATE_LINGER); | |
2106 | ||
2107 | link_free_carrier_maps(link); | |
2108 | ||
2109 | if (link->network) { | |
2110 | link_drop_from_master(link, link->network->bridge); | |
2111 | link_drop_from_master(link, link->network->bond); | |
2112 | } | |
2113 | ||
2114 | log_link_debug(link, "Link removed"); | |
2115 | ||
2116 | (void) unlink(link->state_file); | |
2117 | link_detach_from_manager(link); | |
2118 | } | |
2119 | ||
2120 | static int link_joined(Link *link) { | |
2121 | int r; | |
2122 | ||
2123 | assert(link); | |
2124 | assert(link->network); | |
2125 | ||
2126 | if (!hashmap_isempty(link->bound_to_links)) { | |
2127 | r = link_handle_bound_to_list(link); | |
2128 | if (r < 0) | |
2129 | return r; | |
2130 | } else if (!(link->flags & IFF_UP)) { | |
2131 | r = link_up(link); | |
2132 | if (r < 0) { | |
2133 | link_enter_failed(link); | |
2134 | return r; | |
2135 | } | |
2136 | } | |
2137 | ||
2138 | if (link->network->bridge) { | |
2139 | r = link_set_bridge(link); | |
2140 | if (r < 0) | |
2141 | log_link_error_errno(link, r, "Could not set bridge message: %m"); | |
2142 | ||
2143 | r = link_append_to_master(link, link->network->bridge); | |
2144 | if (r < 0) | |
2145 | log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m"); | |
2146 | } | |
2147 | ||
2148 | if (link->network->bond) { | |
2149 | r = link_set_bond(link); | |
2150 | if (r < 0) | |
2151 | log_link_error_errno(link, r, "Could not set bond message: %m"); | |
2152 | ||
2153 | r = link_append_to_master(link, link->network->bond); | |
2154 | if (r < 0) | |
2155 | log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m"); | |
2156 | } | |
2157 | ||
2158 | if (link->network->use_br_vlan && | |
2159 | (link->network->bridge || streq_ptr("bridge", link->kind))) { | |
2160 | r = link_set_bridge_vlan(link); | |
2161 | if (r < 0) | |
2162 | log_link_error_errno(link, r, "Could not set bridge vlan: %m"); | |
2163 | } | |
2164 | ||
2165 | /* Skip setting up addresses until it gets carrier, | |
2166 | or it would try to set addresses twice, | |
2167 | which is bad for non-idempotent steps. */ | |
2168 | if (!link_has_carrier(link) && !link->network->configure_without_carrier) | |
2169 | return 0; | |
2170 | ||
2171 | return link_request_set_addresses(link); | |
2172 | } | |
2173 | ||
2174 | static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { | |
2175 | int r; | |
2176 | ||
2177 | assert(link); | |
2178 | assert(link->network); | |
2179 | assert(link->enslaving > 0); | |
2180 | ||
2181 | link->enslaving--; | |
2182 | ||
2183 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
2184 | return 1; | |
2185 | ||
2186 | r = sd_netlink_message_get_errno(m); | |
2187 | if (r < 0 && r != -EEXIST) { | |
2188 | log_link_error_errno(link, r, "Could not join netdev: %m"); | |
2189 | link_enter_failed(link); | |
2190 | return 1; | |
2191 | } else | |
2192 | log_link_debug(link, "Joined netdev"); | |
2193 | ||
2194 | if (link->enslaving == 0) { | |
2195 | link_joined(link); | |
2196 | } | |
2197 | ||
2198 | return 1; | |
2199 | } | |
2200 | ||
2201 | static int link_enter_join_netdev(Link *link) { | |
2202 | NetDev *netdev; | |
2203 | Iterator i; | |
2204 | int r; | |
2205 | ||
2206 | assert(link); | |
2207 | assert(link->network); | |
2208 | assert(link->state == LINK_STATE_INITIALIZED); | |
2209 | ||
2210 | link_set_state(link, LINK_STATE_CONFIGURING); | |
2211 | ||
2212 | link_dirty(link); | |
2213 | link->enslaving = 0; | |
2214 | ||
2215 | if (link->network->bond) { | |
2216 | if (link->network->bond->state == NETDEV_STATE_READY && | |
2217 | link->network->bond->ifindex == link->master_ifindex) | |
2218 | return link_joined(link); | |
2219 | ||
2220 | log_struct(LOG_DEBUG, | |
2221 | LOG_LINK_INTERFACE(link), | |
2222 | LOG_NETDEV_INTERFACE(link->network->bond), | |
2223 | LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname)); | |
2224 | ||
2225 | link->enslaving++; | |
2226 | ||
2227 | r = netdev_join(link->network->bond, link, netdev_join_handler); | |
2228 | if (r < 0) { | |
2229 | log_struct_errno(LOG_WARNING, r, | |
2230 | LOG_LINK_INTERFACE(link), | |
2231 | LOG_NETDEV_INTERFACE(link->network->bond), | |
2232 | LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname)); | |
2233 | link_enter_failed(link); | |
2234 | return r; | |
2235 | } | |
2236 | } | |
2237 | ||
2238 | if (link->network->bridge) { | |
2239 | log_struct(LOG_DEBUG, | |
2240 | LOG_LINK_INTERFACE(link), | |
2241 | LOG_NETDEV_INTERFACE(link->network->bridge), | |
2242 | LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname)); | |
2243 | ||
2244 | link->enslaving++; | |
2245 | ||
2246 | r = netdev_join(link->network->bridge, link, netdev_join_handler); | |
2247 | if (r < 0) { | |
2248 | log_struct_errno(LOG_WARNING, r, | |
2249 | LOG_LINK_INTERFACE(link), | |
2250 | LOG_NETDEV_INTERFACE(link->network->bridge), | |
2251 | LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname)); | |
2252 | link_enter_failed(link); | |
2253 | return r; | |
2254 | } | |
2255 | } | |
2256 | ||
2257 | if (link->network->vrf) { | |
2258 | log_struct(LOG_DEBUG, | |
2259 | LOG_LINK_INTERFACE(link), | |
2260 | LOG_NETDEV_INTERFACE(link->network->vrf), | |
2261 | LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname)); | |
2262 | ||
2263 | link->enslaving++; | |
2264 | ||
2265 | r = netdev_join(link->network->vrf, link, netdev_join_handler); | |
2266 | if (r < 0) { | |
2267 | log_struct_errno(LOG_WARNING, r, | |
2268 | LOG_LINK_INTERFACE(link), | |
2269 | LOG_NETDEV_INTERFACE(link->network->vrf), | |
2270 | LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname)); | |
2271 | link_enter_failed(link); | |
2272 | return r; | |
2273 | } | |
2274 | } | |
2275 | ||
2276 | HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) { | |
2277 | ||
2278 | if (netdev->ifindex > 0) | |
2279 | /* Assume already enslaved. */ | |
2280 | continue; | |
2281 | ||
2282 | if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED) | |
2283 | continue; | |
2284 | ||
2285 | log_struct(LOG_DEBUG, | |
2286 | LOG_LINK_INTERFACE(link), | |
2287 | LOG_NETDEV_INTERFACE(netdev), | |
2288 | LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname)); | |
2289 | ||
2290 | link->enslaving++; | |
2291 | ||
2292 | r = netdev_join(netdev, link, netdev_join_handler); | |
2293 | if (r < 0) { | |
2294 | log_struct_errno(LOG_WARNING, r, | |
2295 | LOG_LINK_INTERFACE(link), | |
2296 | LOG_NETDEV_INTERFACE(netdev), | |
2297 | LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname)); | |
2298 | link_enter_failed(link); | |
2299 | return r; | |
2300 | } | |
2301 | } | |
2302 | ||
2303 | if (link->enslaving == 0) | |
2304 | return link_joined(link); | |
2305 | ||
2306 | return 0; | |
2307 | } | |
2308 | ||
2309 | static int link_set_ipv4_forward(Link *link) { | |
2310 | int r; | |
2311 | ||
2312 | if (!link_ipv4_forward_enabled(link)) | |
2313 | return 0; | |
2314 | ||
2315 | /* We propagate the forwarding flag from one interface to the | |
2316 | * global setting one way. This means: as long as at least one | |
2317 | * interface was configured at any time that had IP forwarding | |
2318 | * enabled the setting will stay on for good. We do this | |
2319 | * primarily to keep IPv4 and IPv6 packet forwarding behaviour | |
2320 | * somewhat in sync (see below). */ | |
2321 | ||
2322 | r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1"); | |
2323 | if (r < 0) | |
2324 | log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m"); | |
2325 | ||
2326 | return 0; | |
2327 | } | |
2328 | ||
2329 | static int link_set_ipv6_forward(Link *link) { | |
2330 | int r; | |
2331 | ||
2332 | if (!link_ipv6_forward_enabled(link)) | |
2333 | return 0; | |
2334 | ||
2335 | /* On Linux, the IPv6 stack does not know a per-interface | |
2336 | * packet forwarding setting: either packet forwarding is on | |
2337 | * for all, or off for all. We hence don't bother with a | |
2338 | * per-interface setting, but simply propagate the interface | |
2339 | * flag, if it is set, to the global flag, one-way. Note that | |
2340 | * while IPv4 would allow a per-interface flag, we expose the | |
2341 | * same behaviour there and also propagate the setting from | |
2342 | * one to all, to keep things simple (see above). */ | |
2343 | ||
2344 | r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1"); | |
2345 | if (r < 0) | |
2346 | log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m"); | |
2347 | ||
2348 | return 0; | |
2349 | } | |
2350 | ||
2351 | static int link_set_ipv6_privacy_extensions(Link *link) { | |
2352 | IPv6PrivacyExtensions s; | |
2353 | int r; | |
2354 | ||
2355 | s = link_ipv6_privacy_extensions(link); | |
2356 | if (s < 0) | |
2357 | return 0; | |
2358 | ||
2359 | r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions); | |
2360 | if (r < 0) | |
2361 | log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m"); | |
2362 | ||
2363 | return 0; | |
2364 | } | |
2365 | ||
2366 | static int link_set_ipv6_accept_ra(Link *link) { | |
2367 | int r; | |
2368 | ||
2369 | /* Make this a NOP if IPv6 is not available */ | |
2370 | if (!socket_ipv6_is_supported()) | |
2371 | return 0; | |
2372 | ||
2373 | if (link->flags & IFF_LOOPBACK) | |
2374 | return 0; | |
2375 | ||
2376 | if (!link->network) | |
2377 | return 0; | |
2378 | ||
2379 | r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0"); | |
2380 | if (r < 0) | |
2381 | log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m"); | |
2382 | ||
2383 | return 0; | |
2384 | } | |
2385 | ||
2386 | static int link_set_ipv6_dad_transmits(Link *link) { | |
2387 | int r; | |
2388 | ||
2389 | /* Make this a NOP if IPv6 is not available */ | |
2390 | if (!socket_ipv6_is_supported()) | |
2391 | return 0; | |
2392 | ||
2393 | if (link->flags & IFF_LOOPBACK) | |
2394 | return 0; | |
2395 | ||
2396 | if (!link->network) | |
2397 | return 0; | |
2398 | ||
2399 | if (link->network->ipv6_dad_transmits < 0) | |
2400 | return 0; | |
2401 | ||
2402 | r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits); | |
2403 | if (r < 0) | |
2404 | log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m"); | |
2405 | ||
2406 | return 0; | |
2407 | } | |
2408 | ||
2409 | static int link_set_ipv6_hop_limit(Link *link) { | |
2410 | int r; | |
2411 | ||
2412 | /* Make this a NOP if IPv6 is not available */ | |
2413 | if (!socket_ipv6_is_supported()) | |
2414 | return 0; | |
2415 | ||
2416 | if (link->flags & IFF_LOOPBACK) | |
2417 | return 0; | |
2418 | ||
2419 | if (!link->network) | |
2420 | return 0; | |
2421 | ||
2422 | if (link->network->ipv6_hop_limit < 0) | |
2423 | return 0; | |
2424 | ||
2425 | r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit); | |
2426 | if (r < 0) | |
2427 | log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m"); | |
2428 | ||
2429 | return 0; | |
2430 | } | |
2431 | ||
2432 | static int link_set_ipv6_mtu(Link *link) { | |
2433 | int r; | |
2434 | ||
2435 | /* Make this a NOP if IPv6 is not available */ | |
2436 | if (!socket_ipv6_is_supported()) | |
2437 | return 0; | |
2438 | ||
2439 | if (link->flags & IFF_LOOPBACK) | |
2440 | return 0; | |
2441 | ||
2442 | if (link->network->ipv6_mtu == 0) | |
2443 | return 0; | |
2444 | ||
2445 | r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu); | |
2446 | if (r < 0) | |
2447 | log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m"); | |
2448 | ||
2449 | return 0; | |
2450 | } | |
2451 | ||
2452 | static bool link_is_static_address_configured(Link *link, Address *address) { | |
2453 | Address *net_address; | |
2454 | ||
2455 | assert(link); | |
2456 | assert(address); | |
2457 | ||
2458 | if (!link->network) | |
2459 | return false; | |
2460 | ||
2461 | LIST_FOREACH(addresses, net_address, link->network->static_addresses) | |
2462 | if (address_equal(net_address, address)) | |
2463 | return true; | |
2464 | ||
2465 | return false; | |
2466 | } | |
2467 | ||
2468 | static bool link_is_static_route_configured(Link *link, Route *route) { | |
2469 | Route *net_route; | |
2470 | ||
2471 | assert(link); | |
2472 | assert(route); | |
2473 | ||
2474 | if (!link->network) | |
2475 | return false; | |
2476 | ||
2477 | LIST_FOREACH(routes, net_route, link->network->static_routes) | |
2478 | if (route_equal(net_route, route)) | |
2479 | return true; | |
2480 | ||
2481 | return false; | |
2482 | } | |
2483 | ||
2484 | static int link_drop_foreign_config(Link *link) { | |
2485 | Address *address; | |
2486 | Route *route; | |
2487 | Iterator i; | |
2488 | int r; | |
2489 | ||
2490 | SET_FOREACH(address, link->addresses_foreign, i) { | |
2491 | /* we consider IPv6LL addresses to be managed by the kernel */ | |
2492 | if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1) | |
2493 | continue; | |
2494 | ||
2495 | if (link_is_static_address_configured(link, address)) { | |
2496 | r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL); | |
2497 | if (r < 0) | |
2498 | return log_link_error_errno(link, r, "Failed to add address: %m"); | |
2499 | } else { | |
2500 | r = address_remove(address, link, NULL); | |
2501 | if (r < 0) | |
2502 | return r; | |
2503 | } | |
2504 | } | |
2505 | ||
2506 | SET_FOREACH(route, link->routes_foreign, i) { | |
2507 | /* do not touch routes managed by the kernel */ | |
2508 | if (route->protocol == RTPROT_KERNEL) | |
2509 | continue; | |
2510 | ||
2511 | if (link_is_static_route_configured(link, route)) { | |
2512 | r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL); | |
2513 | if (r < 0) | |
2514 | return r; | |
2515 | } else { | |
2516 | r = route_remove(route, link, NULL); | |
2517 | if (r < 0) | |
2518 | return r; | |
2519 | } | |
2520 | } | |
2521 | ||
2522 | return 0; | |
2523 | } | |
2524 | ||
2525 | static int link_drop_config(Link *link) { | |
2526 | Address *address, *pool_address; | |
2527 | Route *route; | |
2528 | Iterator i; | |
2529 | int r; | |
2530 | ||
2531 | SET_FOREACH(address, link->addresses, i) { | |
2532 | /* we consider IPv6LL addresses to be managed by the kernel */ | |
2533 | if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1) | |
2534 | continue; | |
2535 | ||
2536 | r = address_remove(address, link, NULL); | |
2537 | if (r < 0) | |
2538 | return r; | |
2539 | ||
2540 | /* If this address came from an address pool, clean up the pool */ | |
2541 | LIST_FOREACH(addresses, pool_address, link->pool_addresses) { | |
2542 | if (address_equal(address, pool_address)) { | |
2543 | LIST_REMOVE(addresses, link->pool_addresses, pool_address); | |
2544 | address_free(pool_address); | |
2545 | break; | |
2546 | } | |
2547 | } | |
2548 | } | |
2549 | ||
2550 | SET_FOREACH(route, link->routes, i) { | |
2551 | /* do not touch routes managed by the kernel */ | |
2552 | if (route->protocol == RTPROT_KERNEL) | |
2553 | continue; | |
2554 | ||
2555 | r = route_remove(route, link, NULL); | |
2556 | if (r < 0) | |
2557 | return r; | |
2558 | } | |
2559 | ||
2560 | ndisc_flush(link); | |
2561 | ||
2562 | return 0; | |
2563 | } | |
2564 | ||
2565 | static int link_configure(Link *link) { | |
2566 | int r; | |
2567 | ||
2568 | assert(link); | |
2569 | assert(link->network); | |
2570 | assert(link->state == LINK_STATE_INITIALIZED); | |
2571 | ||
2572 | if (STRPTR_IN_SET(link->kind, "can", "vcan")) | |
2573 | return link_configure_can(link); | |
2574 | ||
2575 | /* Drop foreign config, but ignore loopback or critical devices. | |
2576 | * We do not want to remove loopback address or addresses used for root NFS. */ | |
2577 | if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) { | |
2578 | r = link_drop_foreign_config(link); | |
2579 | if (r < 0) | |
2580 | return r; | |
2581 | } | |
2582 | ||
2583 | r = link_set_proxy_arp(link); | |
2584 | if (r < 0) | |
2585 | return r; | |
2586 | ||
2587 | r = ipv6_proxy_ndp_addresses_configure(link); | |
2588 | if (r < 0) | |
2589 | return r; | |
2590 | ||
2591 | r = link_set_ipv4_forward(link); | |
2592 | if (r < 0) | |
2593 | return r; | |
2594 | ||
2595 | r = link_set_ipv6_forward(link); | |
2596 | if (r < 0) | |
2597 | return r; | |
2598 | ||
2599 | r = link_set_ipv6_privacy_extensions(link); | |
2600 | if (r < 0) | |
2601 | return r; | |
2602 | ||
2603 | r = link_set_ipv6_accept_ra(link); | |
2604 | if (r < 0) | |
2605 | return r; | |
2606 | ||
2607 | r = link_set_ipv6_dad_transmits(link); | |
2608 | if (r < 0) | |
2609 | return r; | |
2610 | ||
2611 | r = link_set_ipv6_hop_limit(link); | |
2612 | if (r < 0) | |
2613 | return r; | |
2614 | ||
2615 | r = link_set_flags(link); | |
2616 | if (r < 0) | |
2617 | return r; | |
2618 | ||
2619 | r = link_set_ipv6_mtu(link); | |
2620 | if (r < 0) | |
2621 | return r; | |
2622 | ||
2623 | if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) { | |
2624 | r = ipv4ll_configure(link); | |
2625 | if (r < 0) | |
2626 | return r; | |
2627 | } | |
2628 | ||
2629 | if (link_dhcp4_enabled(link)) { | |
2630 | r = dhcp4_set_promote_secondaries(link); | |
2631 | if (r < 0) | |
2632 | return r; | |
2633 | ||
2634 | r = dhcp4_configure(link); | |
2635 | if (r < 0) | |
2636 | return r; | |
2637 | } | |
2638 | ||
2639 | if (link_dhcp4_server_enabled(link)) { | |
2640 | r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex); | |
2641 | if (r < 0) | |
2642 | return r; | |
2643 | ||
2644 | r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0); | |
2645 | if (r < 0) | |
2646 | return r; | |
2647 | } | |
2648 | ||
2649 | if (link_dhcp6_enabled(link) || | |
2650 | link_ipv6_accept_ra_enabled(link)) { | |
2651 | r = dhcp6_configure(link); | |
2652 | if (r < 0) | |
2653 | return r; | |
2654 | } | |
2655 | ||
2656 | if (link_ipv6_accept_ra_enabled(link)) { | |
2657 | r = ndisc_configure(link); | |
2658 | if (r < 0) | |
2659 | return r; | |
2660 | } | |
2661 | ||
2662 | if (link_radv_enabled(link)) { | |
2663 | r = radv_configure(link); | |
2664 | if (r < 0) | |
2665 | return r; | |
2666 | } | |
2667 | ||
2668 | if (link_lldp_rx_enabled(link)) { | |
2669 | r = link_lldp_rx_configure(link); | |
2670 | if (r < 0) | |
2671 | return r; | |
2672 | } | |
2673 | ||
2674 | r = link_configure_mtu(link); | |
2675 | if (r < 0) | |
2676 | return r; | |
2677 | ||
2678 | r = link_configure_addrgen_mode(link); | |
2679 | if (r < 0) | |
2680 | return r; | |
2681 | ||
2682 | return link_configure_after_setting_mtu(link); | |
2683 | } | |
2684 | ||
2685 | static int link_configure_after_setting_mtu(Link *link) { | |
2686 | int r; | |
2687 | ||
2688 | assert(link); | |
2689 | assert(link->network); | |
2690 | assert(link->state == LINK_STATE_INITIALIZED); | |
2691 | ||
2692 | if (link->setting_mtu) | |
2693 | return 0; | |
2694 | ||
2695 | if (link_has_carrier(link) || link->network->configure_without_carrier) { | |
2696 | r = link_acquire_conf(link); | |
2697 | if (r < 0) | |
2698 | return r; | |
2699 | } | |
2700 | ||
2701 | return link_enter_join_netdev(link); | |
2702 | } | |
2703 | ||
2704 | static int duid_set_uuid(DUID *duid, sd_id128_t uuid) { | |
2705 | assert(duid); | |
2706 | ||
2707 | if (duid->raw_data_len > 0) | |
2708 | return 0; | |
2709 | ||
2710 | if (duid->type != DUID_TYPE_UUID) | |
2711 | return -EINVAL; | |
2712 | ||
2713 | memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t)); | |
2714 | duid->raw_data_len = sizeof(sd_id128_t); | |
2715 | ||
2716 | return 1; | |
2717 | } | |
2718 | ||
2719 | int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) { | |
2720 | Manager *manager = userdata; | |
2721 | const sd_bus_error *e; | |
2722 | const void *a; | |
2723 | size_t sz; | |
2724 | DUID *duid; | |
2725 | Link *link; | |
2726 | int r; | |
2727 | ||
2728 | assert(m); | |
2729 | assert(manager); | |
2730 | ||
2731 | e = sd_bus_message_get_error(m); | |
2732 | if (e) { | |
2733 | log_error_errno(sd_bus_error_get_errno(e), | |
2734 | "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s", | |
2735 | e->message); | |
2736 | goto configure; | |
2737 | } | |
2738 | ||
2739 | r = sd_bus_message_read_array(m, 'y', &a, &sz); | |
2740 | if (r < 0) | |
2741 | goto configure; | |
2742 | ||
2743 | if (sz != sizeof(sd_id128_t)) { | |
2744 | log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID."); | |
2745 | goto configure; | |
2746 | } | |
2747 | ||
2748 | memcpy(&manager->product_uuid, a, sz); | |
2749 | while ((duid = set_steal_first(manager->duids_requesting_uuid))) | |
2750 | (void) duid_set_uuid(duid, manager->product_uuid); | |
2751 | ||
2752 | manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid); | |
2753 | ||
2754 | configure: | |
2755 | while ((link = set_steal_first(manager->links_requesting_uuid))) { | |
2756 | r = link_configure(link); | |
2757 | if (r < 0) | |
2758 | log_link_error_errno(link, r, "Failed to configure link: %m"); | |
2759 | } | |
2760 | ||
2761 | manager->links_requesting_uuid = set_free(manager->links_requesting_uuid); | |
2762 | ||
2763 | /* To avoid calling GetProductUUID() bus method so frequently, set the flag below | |
2764 | * even if the method fails. */ | |
2765 | manager->has_product_uuid = true; | |
2766 | ||
2767 | return 1; | |
2768 | } | |
2769 | ||
2770 | static bool link_requires_uuid(Link *link) { | |
2771 | const DUID *duid; | |
2772 | ||
2773 | assert(link); | |
2774 | assert(link->manager); | |
2775 | assert(link->network); | |
2776 | ||
2777 | duid = link_get_duid(link); | |
2778 | if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0) | |
2779 | return false; | |
2780 | ||
2781 | if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY)) | |
2782 | return true; | |
2783 | ||
2784 | if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link)) | |
2785 | return true; | |
2786 | ||
2787 | return false; | |
2788 | } | |
2789 | ||
2790 | static int link_configure_duid(Link *link) { | |
2791 | Manager *m; | |
2792 | DUID *duid; | |
2793 | int r; | |
2794 | ||
2795 | assert(link); | |
2796 | assert(link->manager); | |
2797 | assert(link->network); | |
2798 | ||
2799 | m = link->manager; | |
2800 | duid = link_get_duid(link); | |
2801 | ||
2802 | if (!link_requires_uuid(link)) | |
2803 | return 1; | |
2804 | ||
2805 | if (m->has_product_uuid) { | |
2806 | (void) duid_set_uuid(duid, m->product_uuid); | |
2807 | return 1; | |
2808 | } | |
2809 | ||
2810 | if (!m->links_requesting_uuid) { | |
2811 | r = manager_request_product_uuid(m, link); | |
2812 | if (r < 0) { | |
2813 | if (r == -ENOMEM) | |
2814 | return r; | |
2815 | ||
2816 | log_link_warning_errno(link, r, | |
2817 | "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m"); | |
2818 | return 1; | |
2819 | } | |
2820 | } else { | |
2821 | r = set_put(m->links_requesting_uuid, link); | |
2822 | if (r < 0) | |
2823 | return log_oom(); | |
2824 | ||
2825 | r = set_put(m->duids_requesting_uuid, duid); | |
2826 | if (r < 0) | |
2827 | return log_oom(); | |
2828 | } | |
2829 | ||
2830 | return 0; | |
2831 | } | |
2832 | ||
2833 | static int link_initialized_and_synced(Link *link) { | |
2834 | Network *network; | |
2835 | int r; | |
2836 | ||
2837 | assert(link); | |
2838 | assert(link->ifname); | |
2839 | assert(link->manager); | |
2840 | ||
2841 | /* We may get called either from the asynchronous netlink callback, | |
2842 | * or directly for link_add() if running in a container. See link_add(). */ | |
2843 | if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) | |
2844 | return 0; | |
2845 | ||
2846 | log_link_debug(link, "Link state is up-to-date"); | |
2847 | link_set_state(link, LINK_STATE_INITIALIZED); | |
2848 | ||
2849 | r = link_new_bound_by_list(link); | |
2850 | if (r < 0) | |
2851 | return r; | |
2852 | ||
2853 | r = link_handle_bound_by_list(link); | |
2854 | if (r < 0) | |
2855 | return r; | |
2856 | ||
2857 | if (!link->network) { | |
2858 | r = network_get(link->manager, link->sd_device, link->ifname, | |
2859 | &link->mac, &network); | |
2860 | if (r == -ENOENT) { | |
2861 | link_enter_unmanaged(link); | |
2862 | return 0; | |
2863 | } else if (r == 0 && network->unmanaged) { | |
2864 | link_enter_unmanaged(link); | |
2865 | return 0; | |
2866 | } else if (r < 0) | |
2867 | return r; | |
2868 | ||
2869 | if (link->flags & IFF_LOOPBACK) { | |
2870 | if (network->link_local != ADDRESS_FAMILY_NO) | |
2871 | log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link"); | |
2872 | ||
2873 | if (network->dhcp != ADDRESS_FAMILY_NO) | |
2874 | log_link_debug(link, "Ignoring DHCP clients for loopback link"); | |
2875 | ||
2876 | if (network->dhcp_server) | |
2877 | log_link_debug(link, "Ignoring DHCP server for loopback link"); | |
2878 | } | |
2879 | ||
2880 | r = network_apply(network, link); | |
2881 | if (r < 0) | |
2882 | return r; | |
2883 | } | |
2884 | ||
2885 | r = link_new_bound_to_list(link); | |
2886 | if (r < 0) | |
2887 | return r; | |
2888 | ||
2889 | /* link_configure_duid() returns 0 if it requests product UUID. In that case, | |
2890 | * link_configure() is called later asynchronously. */ | |
2891 | r = link_configure_duid(link); | |
2892 | if (r <= 0) | |
2893 | return r; | |
2894 | ||
2895 | r = link_configure(link); | |
2896 | if (r < 0) | |
2897 | return r; | |
2898 | ||
2899 | return 0; | |
2900 | } | |
2901 | ||
2902 | static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { | |
2903 | (void) link_initialized_and_synced(link); | |
2904 | return 1; | |
2905 | } | |
2906 | ||
2907 | int link_initialized(Link *link, sd_device *device) { | |
2908 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; | |
2909 | int r; | |
2910 | ||
2911 | assert(link); | |
2912 | assert(link->manager); | |
2913 | assert(link->manager->rtnl); | |
2914 | assert(device); | |
2915 | ||
2916 | if (link->state != LINK_STATE_PENDING) | |
2917 | return 0; | |
2918 | ||
2919 | if (link->sd_device) | |
2920 | return 0; | |
2921 | ||
2922 | log_link_debug(link, "udev initialized link"); | |
2923 | link_set_state(link, LINK_STATE_INITIALIZED); | |
2924 | ||
2925 | link->sd_device = sd_device_ref(device); | |
2926 | ||
2927 | /* udev has initialized the link, but we don't know if we have yet | |
2928 | * processed the NEWLINK messages with the latest state. Do a GETLINK, | |
2929 | * when it returns we know that the pending NEWLINKs have already been | |
2930 | * processed and that we are up-to-date */ | |
2931 | ||
2932 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK, | |
2933 | link->ifindex); | |
2934 | if (r < 0) | |
2935 | return r; | |
2936 | ||
2937 | r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler, | |
2938 | link_netlink_destroy_callback, link); | |
2939 | if (r < 0) | |
2940 | return r; | |
2941 | ||
2942 | link_ref(link); | |
2943 | ||
2944 | return 0; | |
2945 | } | |
2946 | ||
2947 | static int link_load(Link *link) { | |
2948 | _cleanup_free_ char *network_file = NULL, | |
2949 | *addresses = NULL, | |
2950 | *routes = NULL, | |
2951 | *dhcp4_address = NULL, | |
2952 | *ipv4ll_address = NULL; | |
2953 | union in_addr_union address; | |
2954 | union in_addr_union route_dst; | |
2955 | const char *p; | |
2956 | int r; | |
2957 | ||
2958 | assert(link); | |
2959 | ||
2960 | r = parse_env_file(NULL, link->state_file, | |
2961 | "NETWORK_FILE", &network_file, | |
2962 | "ADDRESSES", &addresses, | |
2963 | "ROUTES", &routes, | |
2964 | "DHCP4_ADDRESS", &dhcp4_address, | |
2965 | "IPV4LL_ADDRESS", &ipv4ll_address); | |
2966 | if (r < 0 && r != -ENOENT) | |
2967 | return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file); | |
2968 | ||
2969 | if (network_file) { | |
2970 | Network *network; | |
2971 | char *suffix; | |
2972 | ||
2973 | /* drop suffix */ | |
2974 | suffix = strrchr(network_file, '.'); | |
2975 | if (!suffix) { | |
2976 | log_link_debug(link, "Failed to get network name from %s", network_file); | |
2977 | goto network_file_fail; | |
2978 | } | |
2979 | *suffix = '\0'; | |
2980 | ||
2981 | r = network_get_by_name(link->manager, basename(network_file), &network); | |
2982 | if (r < 0) { | |
2983 | log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file)); | |
2984 | goto network_file_fail; | |
2985 | } | |
2986 | ||
2987 | r = network_apply(network, link); | |
2988 | if (r < 0) | |
2989 | return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file)); | |
2990 | } | |
2991 | ||
2992 | network_file_fail: | |
2993 | ||
2994 | if (addresses) { | |
2995 | p = addresses; | |
2996 | ||
2997 | for (;;) { | |
2998 | _cleanup_free_ char *address_str = NULL; | |
2999 | char *prefixlen_str; | |
3000 | int family; | |
3001 | unsigned char prefixlen; | |
3002 | ||
3003 | r = extract_first_word(&p, &address_str, NULL, 0); | |
3004 | if (r < 0) { | |
3005 | log_link_debug_errno(link, r, "Failed to extract next address string: %m"); | |
3006 | continue; | |
3007 | } | |
3008 | if (r == 0) | |
3009 | break; | |
3010 | ||
3011 | prefixlen_str = strchr(address_str, '/'); | |
3012 | if (!prefixlen_str) { | |
3013 | log_link_debug(link, "Failed to parse address and prefix length %s", address_str); | |
3014 | continue; | |
3015 | } | |
3016 | ||
3017 | *prefixlen_str++ = '\0'; | |
3018 | ||
3019 | r = sscanf(prefixlen_str, "%hhu", &prefixlen); | |
3020 | if (r != 1) { | |
3021 | log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str); | |
3022 | continue; | |
3023 | } | |
3024 | ||
3025 | r = in_addr_from_string_auto(address_str, &family, &address); | |
3026 | if (r < 0) { | |
3027 | log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str); | |
3028 | continue; | |
3029 | } | |
3030 | ||
3031 | r = address_add(link, family, &address, prefixlen, NULL); | |
3032 | if (r < 0) | |
3033 | return log_link_error_errno(link, r, "Failed to add address: %m"); | |
3034 | } | |
3035 | } | |
3036 | ||
3037 | if (routes) { | |
3038 | p = routes; | |
3039 | ||
3040 | for (;;) { | |
3041 | Route *route; | |
3042 | _cleanup_free_ char *route_str = NULL; | |
3043 | _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL; | |
3044 | usec_t lifetime; | |
3045 | char *prefixlen_str; | |
3046 | int family; | |
3047 | unsigned char prefixlen, tos, table; | |
3048 | uint32_t priority; | |
3049 | ||
3050 | r = extract_first_word(&p, &route_str, NULL, 0); | |
3051 | if (r < 0) { | |
3052 | log_link_debug_errno(link, r, "Failed to extract next route string: %m"); | |
3053 | continue; | |
3054 | } | |
3055 | if (r == 0) | |
3056 | break; | |
3057 | ||
3058 | prefixlen_str = strchr(route_str, '/'); | |
3059 | if (!prefixlen_str) { | |
3060 | log_link_debug(link, "Failed to parse route %s", route_str); | |
3061 | continue; | |
3062 | } | |
3063 | ||
3064 | *prefixlen_str++ = '\0'; | |
3065 | ||
3066 | r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime); | |
3067 | if (r != 5) { | |
3068 | log_link_debug(link, | |
3069 | "Failed to parse destination prefix length, tos, priority, table or expiration %s", | |
3070 | prefixlen_str); | |
3071 | continue; | |
3072 | } | |
3073 | ||
3074 | r = in_addr_from_string_auto(route_str, &family, &route_dst); | |
3075 | if (r < 0) { | |
3076 | log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str); | |
3077 | continue; | |
3078 | } | |
3079 | ||
3080 | r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route); | |
3081 | if (r < 0) | |
3082 | return log_link_error_errno(link, r, "Failed to add route: %m"); | |
3083 | ||
3084 | if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) { | |
3085 | r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime, | |
3086 | 0, route_expire_handler, route); | |
3087 | if (r < 0) | |
3088 | log_link_warning_errno(link, r, "Could not arm route expiration handler: %m"); | |
3089 | } | |
3090 | ||
3091 | route->lifetime = lifetime; | |
3092 | sd_event_source_unref(route->expire); | |
3093 | route->expire = TAKE_PTR(expire); | |
3094 | } | |
3095 | } | |
3096 | ||
3097 | if (dhcp4_address) { | |
3098 | r = in_addr_from_string(AF_INET, dhcp4_address, &address); | |
3099 | if (r < 0) { | |
3100 | log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address); | |
3101 | goto dhcp4_address_fail; | |
3102 | } | |
3103 | ||
3104 | r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0); | |
3105 | if (r < 0) | |
3106 | return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m"); | |
3107 | ||
3108 | r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in); | |
3109 | if (r < 0) | |
3110 | return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address); | |
3111 | } | |
3112 | ||
3113 | dhcp4_address_fail: | |
3114 | ||
3115 | if (ipv4ll_address) { | |
3116 | r = in_addr_from_string(AF_INET, ipv4ll_address, &address); | |
3117 | if (r < 0) { | |
3118 | log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address); | |
3119 | goto ipv4ll_address_fail; | |
3120 | } | |
3121 | ||
3122 | r = sd_ipv4ll_new(&link->ipv4ll); | |
3123 | if (r < 0) | |
3124 | return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m"); | |
3125 | ||
3126 | r = sd_ipv4ll_set_address(link->ipv4ll, &address.in); | |
3127 | if (r < 0) | |
3128 | return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address); | |
3129 | } | |
3130 | ||
3131 | ipv4ll_address_fail: | |
3132 | ||
3133 | return 0; | |
3134 | } | |
3135 | ||
3136 | int link_add(Manager *m, sd_netlink_message *message, Link **ret) { | |
3137 | _cleanup_(sd_device_unrefp) sd_device *device = NULL; | |
3138 | char ifindex_str[2 + DECIMAL_STR_MAX(int)]; | |
3139 | Link *link; | |
3140 | int r; | |
3141 | ||
3142 | assert(m); | |
3143 | assert(m->rtnl); | |
3144 | assert(message); | |
3145 | assert(ret); | |
3146 | ||
3147 | r = link_new(m, message, ret); | |
3148 | if (r < 0) | |
3149 | return r; | |
3150 | ||
3151 | link = *ret; | |
3152 | ||
3153 | log_link_debug(link, "Link %d added", link->ifindex); | |
3154 | ||
3155 | r = link_load(link); | |
3156 | if (r < 0) | |
3157 | return r; | |
3158 | ||
3159 | if (detect_container() <= 0) { | |
3160 | /* not in a container, udev will be around */ | |
3161 | sprintf(ifindex_str, "n%d", link->ifindex); | |
3162 | r = sd_device_new_from_device_id(&device, ifindex_str); | |
3163 | if (r < 0) { | |
3164 | log_link_warning_errno(link, r, "Could not find device: %m"); | |
3165 | goto failed; | |
3166 | } | |
3167 | ||
3168 | r = sd_device_get_is_initialized(device); | |
3169 | if (r < 0) { | |
3170 | log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m"); | |
3171 | goto failed; | |
3172 | } | |
3173 | if (r == 0) { | |
3174 | /* not yet ready */ | |
3175 | log_link_debug(link, "link pending udev initialization..."); | |
3176 | return 0; | |
3177 | } | |
3178 | ||
3179 | r = device_is_renaming(device); | |
3180 | if (r < 0) { | |
3181 | log_link_warning_errno(link, r, "Failed to determine the device is renamed or not: %m"); | |
3182 | goto failed; | |
3183 | } | |
3184 | if (r > 0) { | |
3185 | log_link_debug(link, "Interface is under renaming, pending initialization."); | |
3186 | return 0; | |
3187 | } | |
3188 | ||
3189 | r = link_initialized(link, device); | |
3190 | if (r < 0) | |
3191 | goto failed; | |
3192 | } else { | |
3193 | r = link_initialized_and_synced(link); | |
3194 | if (r < 0) | |
3195 | goto failed; | |
3196 | } | |
3197 | ||
3198 | return 0; | |
3199 | failed: | |
3200 | link_enter_failed(link); | |
3201 | return r; | |
3202 | } | |
3203 | ||
3204 | int link_ipv6ll_gained(Link *link, const struct in6_addr *address) { | |
3205 | int r; | |
3206 | ||
3207 | assert(link); | |
3208 | ||
3209 | log_link_info(link, "Gained IPv6LL"); | |
3210 | ||
3211 | link->ipv6ll_address = *address; | |
3212 | link_check_ready(link); | |
3213 | ||
3214 | if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) { | |
3215 | r = link_acquire_ipv6_conf(link); | |
3216 | if (r < 0) { | |
3217 | link_enter_failed(link); | |
3218 | return r; | |
3219 | } | |
3220 | } | |
3221 | ||
3222 | return 0; | |
3223 | } | |
3224 | ||
3225 | static int link_carrier_gained(Link *link) { | |
3226 | int r; | |
3227 | ||
3228 | assert(link); | |
3229 | ||
3230 | if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) { | |
3231 | r = link_acquire_conf(link); | |
3232 | if (r < 0) { | |
3233 | link_enter_failed(link); | |
3234 | return r; | |
3235 | } | |
3236 | ||
3237 | r = link_request_set_addresses(link); | |
3238 | if (r < 0) | |
3239 | return r; | |
3240 | } | |
3241 | ||
3242 | r = link_handle_bound_by_list(link); | |
3243 | if (r < 0) | |
3244 | return r; | |
3245 | ||
3246 | return 0; | |
3247 | } | |
3248 | ||
3249 | static int link_carrier_lost(Link *link) { | |
3250 | int r; | |
3251 | ||
3252 | assert(link); | |
3253 | ||
3254 | if (link->network && link->network->ignore_carrier_loss) | |
3255 | return 0; | |
3256 | ||
3257 | /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop. | |
3258 | * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the | |
3259 | * configuration and stop the clients as well. */ | |
3260 | if (link->setting_mtu) | |
3261 | return 0; | |
3262 | ||
3263 | r = link_stop_clients(link); | |
3264 | if (r < 0) { | |
3265 | link_enter_failed(link); | |
3266 | return r; | |
3267 | } | |
3268 | ||
3269 | if (link_dhcp4_server_enabled(link)) | |
3270 | (void) sd_dhcp_server_stop(link->dhcp_server); | |
3271 | ||
3272 | r = link_drop_config(link); | |
3273 | if (r < 0) | |
3274 | return r; | |
3275 | ||
3276 | if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) { | |
3277 | log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state)); | |
3278 | r = link_drop_foreign_config(link); | |
3279 | if (r < 0) | |
3280 | return r; | |
3281 | } | |
3282 | ||
3283 | r = link_handle_bound_by_list(link); | |
3284 | if (r < 0) | |
3285 | return r; | |
3286 | ||
3287 | return 0; | |
3288 | } | |
3289 | ||
3290 | int link_carrier_reset(Link *link) { | |
3291 | int r; | |
3292 | ||
3293 | assert(link); | |
3294 | ||
3295 | if (link_has_carrier(link)) { | |
3296 | r = link_carrier_lost(link); | |
3297 | if (r < 0) | |
3298 | return r; | |
3299 | ||
3300 | r = link_carrier_gained(link); | |
3301 | if (r < 0) | |
3302 | return r; | |
3303 | ||
3304 | log_link_info(link, "Reset carrier"); | |
3305 | } | |
3306 | ||
3307 | return 0; | |
3308 | } | |
3309 | ||
3310 | int link_update(Link *link, sd_netlink_message *m) { | |
3311 | struct ether_addr mac; | |
3312 | const char *ifname; | |
3313 | uint32_t mtu; | |
3314 | bool had_carrier, carrier_gained, carrier_lost; | |
3315 | int old_master, r; | |
3316 | ||
3317 | assert(link); | |
3318 | assert(link->ifname); | |
3319 | assert(m); | |
3320 | ||
3321 | if (link->state == LINK_STATE_LINGER) { | |
3322 | log_link_info(link, "Link re-added"); | |
3323 | link_set_state(link, LINK_STATE_CONFIGURING); | |
3324 | ||
3325 | r = link_new_carrier_maps(link); | |
3326 | if (r < 0) | |
3327 | return r; | |
3328 | } | |
3329 | ||
3330 | r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname); | |
3331 | if (r >= 0 && !streq(ifname, link->ifname)) { | |
3332 | Manager *manager = link->manager; | |
3333 | ||
3334 | log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname); | |
3335 | ||
3336 | link_drop(link); | |
3337 | r = link_add(manager, m, &link); | |
3338 | if (r < 0) | |
3339 | return r; | |
3340 | } | |
3341 | ||
3342 | r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu); | |
3343 | if (r >= 0 && mtu > 0) { | |
3344 | link->mtu = mtu; | |
3345 | if (link->original_mtu == 0) { | |
3346 | link->original_mtu = mtu; | |
3347 | log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu); | |
3348 | } | |
3349 | ||
3350 | if (link->dhcp_client) { | |
3351 | r = sd_dhcp_client_set_mtu(link->dhcp_client, | |
3352 | link->mtu); | |
3353 | if (r < 0) | |
3354 | return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m"); | |
3355 | } | |
3356 | ||
3357 | if (link->radv) { | |
3358 | r = sd_radv_set_mtu(link->radv, link->mtu); | |
3359 | if (r < 0) | |
3360 | return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m"); | |
3361 | } | |
3362 | } | |
3363 | ||
3364 | /* The kernel may broadcast NEWLINK messages without the MAC address | |
3365 | set, simply ignore them. */ | |
3366 | r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac); | |
3367 | if (r >= 0) { | |
3368 | if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet, | |
3369 | ETH_ALEN)) { | |
3370 | ||
3371 | memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet, | |
3372 | ETH_ALEN); | |
3373 | ||
3374 | log_link_debug(link, "MAC address: " | |
3375 | "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx", | |
3376 | mac.ether_addr_octet[0], | |
3377 | mac.ether_addr_octet[1], | |
3378 | mac.ether_addr_octet[2], | |
3379 | mac.ether_addr_octet[3], | |
3380 | mac.ether_addr_octet[4], | |
3381 | mac.ether_addr_octet[5]); | |
3382 | ||
3383 | if (link->ipv4ll) { | |
3384 | r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac); | |
3385 | if (r < 0) | |
3386 | return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m"); | |
3387 | } | |
3388 | ||
3389 | if (link->dhcp_client) { | |
3390 | r = sd_dhcp_client_set_mac(link->dhcp_client, | |
3391 | (const uint8_t *) &link->mac, | |
3392 | sizeof (link->mac), | |
3393 | ARPHRD_ETHER); | |
3394 | if (r < 0) | |
3395 | return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m"); | |
3396 | ||
3397 | r = dhcp4_set_client_identifier(link); | |
3398 | if (r < 0) | |
3399 | return r; | |
3400 | } | |
3401 | ||
3402 | if (link->dhcp6_client) { | |
3403 | const DUID* duid = link_get_duid(link); | |
3404 | ||
3405 | r = sd_dhcp6_client_set_mac(link->dhcp6_client, | |
3406 | (const uint8_t *) &link->mac, | |
3407 | sizeof (link->mac), | |
3408 | ARPHRD_ETHER); | |
3409 | if (r < 0) | |
3410 | return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m"); | |
3411 | ||
3412 | if (link->network->iaid_set) { | |
3413 | r = sd_dhcp6_client_set_iaid(link->dhcp6_client, | |
3414 | link->network->iaid); | |
3415 | if (r < 0) | |
3416 | return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m"); | |
3417 | } | |
3418 | ||
3419 | r = sd_dhcp6_client_set_duid(link->dhcp6_client, | |
3420 | duid->type, | |
3421 | duid->raw_data_len > 0 ? duid->raw_data : NULL, | |
3422 | duid->raw_data_len); | |
3423 | if (r < 0) | |
3424 | return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m"); | |
3425 | } | |
3426 | ||
3427 | if (link->radv) { | |
3428 | r = sd_radv_set_mac(link->radv, &link->mac); | |
3429 | if (r < 0) | |
3430 | return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m"); | |
3431 | } | |
3432 | ||
3433 | if (link->ndisc) { | |
3434 | r = sd_ndisc_set_mac(link->ndisc, &link->mac); | |
3435 | if (r < 0) | |
3436 | return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m"); | |
3437 | } | |
3438 | } | |
3439 | } | |
3440 | ||
3441 | old_master = link->master_ifindex; | |
3442 | (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex); | |
3443 | ||
3444 | had_carrier = link_has_carrier(link); | |
3445 | ||
3446 | r = link_update_flags(link, m, old_master != link->master_ifindex); | |
3447 | if (r < 0) | |
3448 | return r; | |
3449 | ||
3450 | r = link_update_lldp(link); | |
3451 | if (r < 0) | |
3452 | return r; | |
3453 | ||
3454 | carrier_gained = !had_carrier && link_has_carrier(link); | |
3455 | carrier_lost = had_carrier && !link_has_carrier(link); | |
3456 | ||
3457 | if (carrier_gained) { | |
3458 | log_link_info(link, "Gained carrier"); | |
3459 | ||
3460 | r = link_carrier_gained(link); | |
3461 | if (r < 0) | |
3462 | return r; | |
3463 | } else if (carrier_lost) { | |
3464 | log_link_info(link, "Lost carrier"); | |
3465 | ||
3466 | r = link_carrier_lost(link); | |
3467 | if (r < 0) | |
3468 | return r; | |
3469 | } | |
3470 | ||
3471 | return 0; | |
3472 | } | |
3473 | ||
3474 | static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) { | |
3475 | bool space = false; | |
3476 | Iterator i; | |
3477 | Link *link; | |
3478 | ||
3479 | assert(f); | |
3480 | assert(prefix); | |
3481 | ||
3482 | if (hashmap_isempty(h)) | |
3483 | return; | |
3484 | ||
3485 | fputs(prefix, f); | |
3486 | HASHMAP_FOREACH(link, h, i) { | |
3487 | if (space) | |
3488 | fputc(' ', f); | |
3489 | ||
3490 | fprintf(f, "%i", link->ifindex); | |
3491 | space = true; | |
3492 | } | |
3493 | ||
3494 | fputc('\n', f); | |
3495 | } | |
3496 | ||
3497 | int link_save(Link *link) { | |
3498 | _cleanup_free_ char *temp_path = NULL; | |
3499 | _cleanup_fclose_ FILE *f = NULL; | |
3500 | const char *admin_state, *oper_state; | |
3501 | Address *a; | |
3502 | Route *route; | |
3503 | Iterator i; | |
3504 | int r; | |
3505 | ||
3506 | assert(link); | |
3507 | assert(link->state_file); | |
3508 | assert(link->lease_file); | |
3509 | assert(link->manager); | |
3510 | ||
3511 | if (link->state == LINK_STATE_LINGER) { | |
3512 | (void) unlink(link->state_file); | |
3513 | return 0; | |
3514 | } | |
3515 | ||
3516 | link_lldp_save(link); | |
3517 | ||
3518 | admin_state = link_state_to_string(link->state); | |
3519 | assert(admin_state); | |
3520 | ||
3521 | oper_state = link_operstate_to_string(link->operstate); | |
3522 | assert(oper_state); | |
3523 | ||
3524 | r = fopen_temporary(link->state_file, &f, &temp_path); | |
3525 | if (r < 0) | |
3526 | goto fail; | |
3527 | ||
3528 | (void) fchmod(fileno(f), 0644); | |
3529 | ||
3530 | fprintf(f, | |
3531 | "# This is private data. Do not parse.\n" | |
3532 | "ADMIN_STATE=%s\n" | |
3533 | "OPER_STATE=%s\n", | |
3534 | admin_state, oper_state); | |
3535 | ||
3536 | if (link->network) { | |
3537 | char **dhcp6_domains = NULL, **dhcp_domains = NULL; | |
3538 | const char *dhcp_domainname = NULL, *p; | |
3539 | sd_dhcp6_lease *dhcp6_lease = NULL; | |
3540 | unsigned j; | |
3541 | bool space; | |
3542 | ||
3543 | fprintf(f, "REQUIRED_FOR_ONLINE=%s\n", | |
3544 | yes_no(link->network->required_for_online)); | |
3545 | ||
3546 | fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s\n", | |
3547 | strempty(link_operstate_to_string(link->network->required_operstate_for_online))); | |
3548 | ||
3549 | if (link->dhcp6_client) { | |
3550 | r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease); | |
3551 | if (r < 0 && r != -ENOMSG) | |
3552 | log_link_debug(link, "No DHCPv6 lease"); | |
3553 | } | |
3554 | ||
3555 | fprintf(f, "NETWORK_FILE=%s\n", link->network->filename); | |
3556 | ||
3557 | fputs("DNS=", f); | |
3558 | space = false; | |
3559 | ||
3560 | for (j = 0; j < link->network->n_dns; j++) { | |
3561 | _cleanup_free_ char *b = NULL; | |
3562 | ||
3563 | r = in_addr_to_string(link->network->dns[j].family, | |
3564 | &link->network->dns[j].address, &b); | |
3565 | if (r < 0) { | |
3566 | log_debug_errno(r, "Failed to format address, ignoring: %m"); | |
3567 | continue; | |
3568 | } | |
3569 | ||
3570 | if (space) | |
3571 | fputc(' ', f); | |
3572 | fputs(b, f); | |
3573 | space = true; | |
3574 | } | |
3575 | ||
3576 | if (link->network->dhcp_use_dns && | |
3577 | link->dhcp_lease) { | |
3578 | const struct in_addr *addresses; | |
3579 | ||
3580 | r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses); | |
3581 | if (r > 0) | |
3582 | if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0) | |
3583 | space = true; | |
3584 | } | |
3585 | ||
3586 | if (link->network->dhcp_use_dns && dhcp6_lease) { | |
3587 | struct in6_addr *in6_addrs; | |
3588 | ||
3589 | r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs); | |
3590 | if (r > 0) { | |
3591 | if (space) | |
3592 | fputc(' ', f); | |
3593 | serialize_in6_addrs(f, in6_addrs, r); | |
3594 | space = true; | |
3595 | } | |
3596 | } | |
3597 | ||
3598 | /* Make sure to flush out old entries before we use the NDISC data */ | |
3599 | ndisc_vacuum(link); | |
3600 | ||
3601 | if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) { | |
3602 | NDiscRDNSS *dd; | |
3603 | ||
3604 | SET_FOREACH(dd, link->ndisc_rdnss, i) { | |
3605 | if (space) | |
3606 | fputc(' ', f); | |
3607 | ||
3608 | serialize_in6_addrs(f, &dd->address, 1); | |
3609 | space = true; | |
3610 | } | |
3611 | } | |
3612 | ||
3613 | fputc('\n', f); | |
3614 | ||
3615 | fputs("NTP=", f); | |
3616 | space = false; | |
3617 | fputstrv(f, link->network->ntp, NULL, &space); | |
3618 | ||
3619 | if (link->network->dhcp_use_ntp && | |
3620 | link->dhcp_lease) { | |
3621 | const struct in_addr *addresses; | |
3622 | ||
3623 | r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses); | |
3624 | if (r > 0) | |
3625 | if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0) | |
3626 | space = true; | |
3627 | } | |
3628 | ||
3629 | if (link->network->dhcp_use_ntp && dhcp6_lease) { | |
3630 | struct in6_addr *in6_addrs; | |
3631 | char **hosts; | |
3632 | ||
3633 | r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease, | |
3634 | &in6_addrs); | |
3635 | if (r > 0) { | |
3636 | if (space) | |
3637 | fputc(' ', f); | |
3638 | serialize_in6_addrs(f, in6_addrs, r); | |
3639 | space = true; | |
3640 | } | |
3641 | ||
3642 | r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts); | |
3643 | if (r > 0) | |
3644 | fputstrv(f, hosts, NULL, &space); | |
3645 | } | |
3646 | ||
3647 | fputc('\n', f); | |
3648 | ||
3649 | if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) { | |
3650 | if (link->dhcp_lease) { | |
3651 | (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname); | |
3652 | (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains); | |
3653 | } | |
3654 | if (dhcp6_lease) | |
3655 | (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains); | |
3656 | } | |
3657 | ||
3658 | fputs("DOMAINS=", f); | |
3659 | space = false; | |
3660 | ORDERED_SET_FOREACH(p, link->network->search_domains, i) | |
3661 | fputs_with_space(f, p, NULL, &space); | |
3662 | ||
3663 | if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) { | |
3664 | NDiscDNSSL *dd; | |
3665 | ||
3666 | if (dhcp_domainname) | |
3667 | fputs_with_space(f, dhcp_domainname, NULL, &space); | |
3668 | if (dhcp_domains) | |
3669 | fputstrv(f, dhcp_domains, NULL, &space); | |
3670 | if (dhcp6_domains) | |
3671 | fputstrv(f, dhcp6_domains, NULL, &space); | |
3672 | ||
3673 | SET_FOREACH(dd, link->ndisc_dnssl, i) | |
3674 | fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space); | |
3675 | } | |
3676 | ||
3677 | fputc('\n', f); | |
3678 | ||
3679 | fputs("ROUTE_DOMAINS=", f); | |
3680 | space = false; | |
3681 | ORDERED_SET_FOREACH(p, link->network->route_domains, i) | |
3682 | fputs_with_space(f, p, NULL, &space); | |
3683 | ||
3684 | if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) { | |
3685 | NDiscDNSSL *dd; | |
3686 | ||
3687 | if (dhcp_domainname) | |
3688 | fputs_with_space(f, dhcp_domainname, NULL, &space); | |
3689 | if (dhcp_domains) | |
3690 | fputstrv(f, dhcp_domains, NULL, &space); | |
3691 | if (dhcp6_domains) | |
3692 | fputstrv(f, dhcp6_domains, NULL, &space); | |
3693 | ||
3694 | SET_FOREACH(dd, link->ndisc_dnssl, i) | |
3695 | fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space); | |
3696 | } | |
3697 | ||
3698 | fputc('\n', f); | |
3699 | ||
3700 | fprintf(f, "LLMNR=%s\n", | |
3701 | resolve_support_to_string(link->network->llmnr)); | |
3702 | fprintf(f, "MDNS=%s\n", | |
3703 | resolve_support_to_string(link->network->mdns)); | |
3704 | if (link->network->dns_default_route >= 0) | |
3705 | fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route)); | |
3706 | ||
3707 | if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID) | |
3708 | fprintf(f, "DNS_OVER_TLS=%s\n", | |
3709 | dns_over_tls_mode_to_string(link->network->dns_over_tls_mode)); | |
3710 | ||
3711 | if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID) | |
3712 | fprintf(f, "DNSSEC=%s\n", | |
3713 | dnssec_mode_to_string(link->network->dnssec_mode)); | |
3714 | ||
3715 | if (!set_isempty(link->network->dnssec_negative_trust_anchors)) { | |
3716 | const char *n; | |
3717 | ||
3718 | fputs("DNSSEC_NTA=", f); | |
3719 | space = false; | |
3720 | SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i) | |
3721 | fputs_with_space(f, n, NULL, &space); | |
3722 | fputc('\n', f); | |
3723 | } | |
3724 | ||
3725 | fputs("ADDRESSES=", f); | |
3726 | space = false; | |
3727 | SET_FOREACH(a, link->addresses, i) { | |
3728 | _cleanup_free_ char *address_str = NULL; | |
3729 | ||
3730 | r = in_addr_to_string(a->family, &a->in_addr, &address_str); | |
3731 | if (r < 0) | |
3732 | goto fail; | |
3733 | ||
3734 | fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen); | |
3735 | space = true; | |
3736 | } | |
3737 | fputc('\n', f); | |
3738 | ||
3739 | fputs("ROUTES=", f); | |
3740 | space = false; | |
3741 | SET_FOREACH(route, link->routes, i) { | |
3742 | _cleanup_free_ char *route_str = NULL; | |
3743 | ||
3744 | r = in_addr_to_string(route->family, &route->dst, &route_str); | |
3745 | if (r < 0) | |
3746 | goto fail; | |
3747 | ||
3748 | fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT, | |
3749 | space ? " " : "", route_str, | |
3750 | route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime); | |
3751 | space = true; | |
3752 | } | |
3753 | ||
3754 | fputc('\n', f); | |
3755 | } | |
3756 | ||
3757 | print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links); | |
3758 | print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links); | |
3759 | ||
3760 | if (link->dhcp_lease) { | |
3761 | struct in_addr address; | |
3762 | const char *tz = NULL; | |
3763 | ||
3764 | assert(link->network); | |
3765 | ||
3766 | r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz); | |
3767 | if (r >= 0) | |
3768 | fprintf(f, "TIMEZONE=%s\n", tz); | |
3769 | ||
3770 | r = sd_dhcp_lease_get_address(link->dhcp_lease, &address); | |
3771 | if (r >= 0) { | |
3772 | fputs("DHCP4_ADDRESS=", f); | |
3773 | serialize_in_addrs(f, &address, 1, false, NULL); | |
3774 | fputc('\n', f); | |
3775 | } | |
3776 | ||
3777 | r = dhcp_lease_save(link->dhcp_lease, link->lease_file); | |
3778 | if (r < 0) | |
3779 | goto fail; | |
3780 | ||
3781 | fprintf(f, | |
3782 | "DHCP_LEASE=%s\n", | |
3783 | link->lease_file); | |
3784 | } else | |
3785 | (void) unlink(link->lease_file); | |
3786 | ||
3787 | if (link->ipv4ll) { | |
3788 | struct in_addr address; | |
3789 | ||
3790 | r = sd_ipv4ll_get_address(link->ipv4ll, &address); | |
3791 | if (r >= 0) { | |
3792 | fputs("IPV4LL_ADDRESS=", f); | |
3793 | serialize_in_addrs(f, &address, 1, false, NULL); | |
3794 | fputc('\n', f); | |
3795 | } | |
3796 | } | |
3797 | ||
3798 | r = fflush_and_check(f); | |
3799 | if (r < 0) | |
3800 | goto fail; | |
3801 | ||
3802 | if (rename(temp_path, link->state_file) < 0) { | |
3803 | r = -errno; | |
3804 | goto fail; | |
3805 | } | |
3806 | ||
3807 | return 0; | |
3808 | ||
3809 | fail: | |
3810 | (void) unlink(link->state_file); | |
3811 | if (temp_path) | |
3812 | (void) unlink(temp_path); | |
3813 | ||
3814 | return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file); | |
3815 | } | |
3816 | ||
3817 | /* The serialized state in /run is no longer up-to-date. */ | |
3818 | void link_dirty(Link *link) { | |
3819 | int r; | |
3820 | ||
3821 | assert(link); | |
3822 | ||
3823 | /* mark manager dirty as link is dirty */ | |
3824 | manager_dirty(link->manager); | |
3825 | ||
3826 | r = set_ensure_allocated(&link->manager->dirty_links, NULL); | |
3827 | if (r < 0) | |
3828 | /* allocation errors are ignored */ | |
3829 | return; | |
3830 | ||
3831 | r = set_put(link->manager->dirty_links, link); | |
3832 | if (r <= 0) | |
3833 | /* don't take another ref if the link was already dirty */ | |
3834 | return; | |
3835 | ||
3836 | link_ref(link); | |
3837 | } | |
3838 | ||
3839 | /* The serialized state in /run is up-to-date */ | |
3840 | void link_clean(Link *link) { | |
3841 | assert(link); | |
3842 | assert(link->manager); | |
3843 | ||
3844 | link_unref(set_remove(link->manager->dirty_links, link)); | |
3845 | } | |
3846 | ||
3847 | static const char* const link_state_table[_LINK_STATE_MAX] = { | |
3848 | [LINK_STATE_PENDING] = "pending", | |
3849 | [LINK_STATE_INITIALIZED] = "initialized", | |
3850 | [LINK_STATE_CONFIGURING] = "configuring", | |
3851 | [LINK_STATE_CONFIGURED] = "configured", | |
3852 | [LINK_STATE_UNMANAGED] = "unmanaged", | |
3853 | [LINK_STATE_FAILED] = "failed", | |
3854 | [LINK_STATE_LINGER] = "linger", | |
3855 | }; | |
3856 | ||
3857 | DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState); |