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1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ | |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2013 Tom Gundersen <teg@jklm.no> | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <netinet/ether.h> | |
23 | #include <linux/if.h> | |
24 | #include <unistd.h> | |
25 | ||
26 | #include "networkd-link.h" | |
27 | #include "networkd-netdev.h" | |
28 | #include "libudev-private.h" | |
29 | #include "udev-util.h" | |
30 | #include "util.h" | |
31 | #include "virt.h" | |
32 | #include "bus-util.h" | |
33 | #include "network-internal.h" | |
34 | #include "conf-parser.h" | |
35 | ||
36 | #include "dhcp-lease-internal.h" | |
37 | ||
38 | #define FLAG_STRING(string, flag, old, new) \ | |
39 | (((old ^ new) & flag) \ | |
40 | ? ((old & flag) ? (" -" string) : (" +" string)) \ | |
41 | : "") | |
42 | ||
43 | static int link_update_flags(Link *link, sd_rtnl_message *m) { | |
44 | unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags; | |
45 | uint8_t operstate; | |
46 | int r; | |
47 | ||
48 | assert(link); | |
49 | ||
50 | r = sd_rtnl_message_link_get_flags(m, &flags); | |
51 | if (r < 0) { | |
52 | log_warning_link(link, "Could not get link flags"); | |
53 | return r; | |
54 | } | |
55 | ||
56 | r = sd_rtnl_message_read_u8(m, IFLA_OPERSTATE, &operstate); | |
57 | if (r < 0) | |
58 | /* if we got a message without operstate, take it to mean | |
59 | the state was unchanged */ | |
60 | operstate = link->kernel_operstate; | |
61 | ||
62 | if ((link->flags == flags) && (link->kernel_operstate == operstate)) | |
63 | return 0; | |
64 | ||
65 | if (link->flags != flags) { | |
66 | log_debug_link(link, "flags change:%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s", | |
67 | FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags), | |
68 | FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags), | |
69 | FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags), | |
70 | FLAG_STRING("UP", IFF_UP, link->flags, flags), | |
71 | FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags), | |
72 | FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags), | |
73 | FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags), | |
74 | FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags), | |
75 | FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags), | |
76 | FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags), | |
77 | FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags), | |
78 | FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags), | |
79 | FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags), | |
80 | FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags), | |
81 | FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags), | |
82 | FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags), | |
83 | FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags), | |
84 | FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags), | |
85 | FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags)); | |
86 | ||
87 | unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP | | |
88 | IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING | | |
89 | IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT | | |
90 | IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL | | |
91 | IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP | | |
92 | IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO); | |
93 | unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags); | |
94 | unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags); | |
95 | ||
96 | /* link flags are currently at most 18 bits, let's align to | |
97 | * printing 20 */ | |
98 | if (unknown_flags_added) | |
99 | log_debug_link(link, | |
100 | "unknown link flags gained: %#.5x (ignoring)", | |
101 | unknown_flags_added); | |
102 | ||
103 | if (unknown_flags_removed) | |
104 | log_debug_link(link, | |
105 | "unknown link flags lost: %#.5x (ignoring)", | |
106 | unknown_flags_removed); | |
107 | } | |
108 | ||
109 | link->flags = flags; | |
110 | link->kernel_operstate = operstate; | |
111 | ||
112 | link_save(link); | |
113 | ||
114 | return 0; | |
115 | } | |
116 | ||
117 | static int link_new(Manager *manager, sd_rtnl_message *message, Link **ret) { | |
118 | _cleanup_link_unref_ Link *link = NULL; | |
119 | uint16_t type; | |
120 | const char *ifname; | |
121 | int r, ifindex; | |
122 | ||
123 | assert(manager); | |
124 | assert(message); | |
125 | assert(ret); | |
126 | ||
127 | r = sd_rtnl_message_get_type(message, &type); | |
128 | if (r < 0) | |
129 | return r; | |
130 | else if (type != RTM_NEWLINK) | |
131 | return -EINVAL; | |
132 | ||
133 | r = sd_rtnl_message_link_get_ifindex(message, &ifindex); | |
134 | if (r < 0) | |
135 | return r; | |
136 | else if (ifindex <= 0) | |
137 | return -EINVAL; | |
138 | ||
139 | r = sd_rtnl_message_read_string(message, IFLA_IFNAME, &ifname); | |
140 | if (r < 0) | |
141 | return r; | |
142 | ||
143 | link = new0(Link, 1); | |
144 | if (!link) | |
145 | return -ENOMEM; | |
146 | ||
147 | link->n_ref = 1; | |
148 | link->manager = manager; | |
149 | link->state = LINK_STATE_PENDING; | |
150 | link->ifindex = ifindex; | |
151 | link->ifname = strdup(ifname); | |
152 | if (!link->ifname) | |
153 | return -ENOMEM; | |
154 | ||
155 | r = sd_rtnl_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac); | |
156 | if (r < 0) | |
157 | log_debug_link(link, "MAC address not found for new device, continuing without"); | |
158 | ||
159 | r = asprintf(&link->state_file, "/run/systemd/netif/links/%d", | |
160 | link->ifindex); | |
161 | if (r < 0) | |
162 | return -ENOMEM; | |
163 | ||
164 | r = asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", | |
165 | link->ifindex); | |
166 | if (r < 0) | |
167 | return -ENOMEM; | |
168 | ||
169 | r = hashmap_ensure_allocated(&manager->links, NULL, NULL); | |
170 | if (r < 0) | |
171 | return r; | |
172 | ||
173 | r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link); | |
174 | if (r < 0) | |
175 | return r; | |
176 | ||
177 | r = link_update_flags(link, message); | |
178 | if (r < 0) | |
179 | return r; | |
180 | ||
181 | *ret = link; | |
182 | link = NULL; | |
183 | ||
184 | return 0; | |
185 | } | |
186 | ||
187 | static void link_free(Link *link) { | |
188 | Address *address; | |
189 | ||
190 | if (!link) | |
191 | return; | |
192 | ||
193 | while ((address = link->addresses)) { | |
194 | LIST_REMOVE(addresses, link->addresses, address); | |
195 | address_free(address); | |
196 | } | |
197 | ||
198 | while ((address = link->pool_addresses)) { | |
199 | LIST_REMOVE(addresses, link->pool_addresses, address); | |
200 | address_free(address); | |
201 | } | |
202 | ||
203 | sd_dhcp_client_unref(link->dhcp_client); | |
204 | sd_dhcp_lease_unref(link->dhcp_lease); | |
205 | ||
206 | unlink(link->lease_file); | |
207 | free(link->lease_file); | |
208 | ||
209 | sd_ipv4ll_unref(link->ipv4ll); | |
210 | sd_dhcp6_client_unref(link->dhcp6_client); | |
211 | sd_icmp6_nd_unref(link->icmp6_router_discovery); | |
212 | ||
213 | if (link->manager) | |
214 | hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)); | |
215 | ||
216 | free(link->ifname); | |
217 | ||
218 | unlink(link->state_file); | |
219 | free(link->state_file); | |
220 | ||
221 | udev_device_unref(link->udev_device); | |
222 | ||
223 | free(link); | |
224 | } | |
225 | ||
226 | Link *link_unref(Link *link) { | |
227 | if (link && (-- link->n_ref <= 0)) | |
228 | link_free(link); | |
229 | ||
230 | return NULL; | |
231 | } | |
232 | ||
233 | Link *link_ref(Link *link) { | |
234 | if (link) | |
235 | assert_se(++ link->n_ref >= 2); | |
236 | ||
237 | return link; | |
238 | } | |
239 | ||
240 | int link_get(Manager *m, int ifindex, Link **ret) { | |
241 | Link *link; | |
242 | ||
243 | assert(m); | |
244 | assert(ifindex); | |
245 | assert(ret); | |
246 | ||
247 | link = hashmap_get(m->links, INT_TO_PTR(ifindex)); | |
248 | if (!link) | |
249 | return -ENODEV; | |
250 | ||
251 | *ret = link; | |
252 | ||
253 | return 0; | |
254 | } | |
255 | ||
256 | void link_drop(Link *link) { | |
257 | if (!link || link->state == LINK_STATE_LINGER) | |
258 | return; | |
259 | ||
260 | link->state = LINK_STATE_LINGER; | |
261 | ||
262 | log_debug_link(link, "link removed"); | |
263 | ||
264 | link_unref(link); | |
265 | ||
266 | return; | |
267 | } | |
268 | ||
269 | static void link_enter_unmanaged(Link *link) { | |
270 | assert(link); | |
271 | ||
272 | log_debug_link(link, "unmanaged"); | |
273 | ||
274 | link->state = LINK_STATE_UNMANAGED; | |
275 | ||
276 | link_save(link); | |
277 | } | |
278 | ||
279 | static int link_stop_clients(Link *link) { | |
280 | int r = 0, k; | |
281 | ||
282 | assert(link); | |
283 | assert(link->manager); | |
284 | assert(link->manager->event); | |
285 | ||
286 | if (!link->network) | |
287 | return 0; | |
288 | ||
289 | if (link->dhcp_client) { | |
290 | k = sd_dhcp_client_stop(link->dhcp_client); | |
291 | if (k < 0) { | |
292 | log_warning_link(link, "Could not stop DHCPv4 client: %s", | |
293 | strerror(-r)); | |
294 | r = k; | |
295 | } | |
296 | } | |
297 | ||
298 | if (link->ipv4ll) { | |
299 | k = sd_ipv4ll_stop(link->ipv4ll); | |
300 | if (k < 0) { | |
301 | log_warning_link(link, "Could not stop IPv4 link-local: %s", | |
302 | strerror(-r)); | |
303 | r = k; | |
304 | } | |
305 | } | |
306 | ||
307 | if (link->dhcp_server) { | |
308 | k = sd_dhcp_server_stop(link->dhcp_server); | |
309 | if (k < 0) { | |
310 | log_warning_link(link, "Could not stop DHCPv4 server: %s", | |
311 | strerror(-r)); | |
312 | r = k; | |
313 | } | |
314 | } | |
315 | ||
316 | if(link->icmp6_router_discovery) { | |
317 | ||
318 | if (link->dhcp6_client) { | |
319 | k = sd_dhcp6_client_stop(link->dhcp6_client); | |
320 | if (k < 0) { | |
321 | log_warning_link(link, "Could not stop DHCPv6 client: %s", | |
322 | strerror(-r)); | |
323 | r = k; | |
324 | } | |
325 | } | |
326 | ||
327 | k = sd_icmp6_nd_stop(link->icmp6_router_discovery); | |
328 | if (k < 0) { | |
329 | log_warning_link(link, | |
330 | "Could not stop ICMPv6 router discovery: %s", | |
331 | strerror(-r)); | |
332 | r = k; | |
333 | } | |
334 | } | |
335 | ||
336 | return r; | |
337 | } | |
338 | ||
339 | void link_enter_failed(Link *link) { | |
340 | assert(link); | |
341 | ||
342 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
343 | return; | |
344 | ||
345 | log_warning_link(link, "failed"); | |
346 | ||
347 | link->state = LINK_STATE_FAILED; | |
348 | ||
349 | link_stop_clients(link); | |
350 | ||
351 | link_save(link); | |
352 | } | |
353 | ||
354 | static Address* link_find_dhcp_server_address(Link *link) { | |
355 | Address *address; | |
356 | ||
357 | assert(link); | |
358 | assert(link->network); | |
359 | ||
360 | /* The the first statically configured address if there is any */ | |
361 | LIST_FOREACH(addresses, address, link->network->static_addresses) { | |
362 | ||
363 | if (address->family != AF_INET) | |
364 | continue; | |
365 | ||
366 | if (in_addr_is_null(address->family, &address->in_addr)) | |
367 | continue; | |
368 | ||
369 | return address; | |
370 | } | |
371 | ||
372 | /* If that didn't work, find a suitable address we got from the pool */ | |
373 | LIST_FOREACH(addresses, address, link->pool_addresses) { | |
374 | if (address->family != AF_INET) | |
375 | continue; | |
376 | ||
377 | return address; | |
378 | } | |
379 | ||
380 | return NULL; | |
381 | } | |
382 | ||
383 | static int link_enter_configured(Link *link) { | |
384 | int r; | |
385 | ||
386 | assert(link); | |
387 | assert(link->network); | |
388 | assert(link->state == LINK_STATE_SETTING_ROUTES); | |
389 | ||
390 | if (link->network->dhcp_server && | |
391 | !sd_dhcp_server_is_running(link->dhcp_server)) { | |
392 | struct in_addr pool_start; | |
393 | Address *address; | |
394 | ||
395 | address = link_find_dhcp_server_address(link); | |
396 | if (!address) { | |
397 | log_warning_link(link, | |
398 | "Failed to find suitable address for DHCPv4 server instance."); | |
399 | link_enter_failed(link); | |
400 | return 0; | |
401 | } | |
402 | ||
403 | log_debug_link(link, "offering DHCPv4 leases"); | |
404 | ||
405 | r = sd_dhcp_server_set_address(link->dhcp_server, | |
406 | &address->in_addr.in, | |
407 | address->prefixlen); | |
408 | if (r < 0) | |
409 | return r; | |
410 | ||
411 | /* offer 32 addresses starting from the address following the server address */ | |
412 | pool_start.s_addr = htobe32(be32toh(address->in_addr.in.s_addr) + 1); | |
413 | r = sd_dhcp_server_set_lease_pool(link->dhcp_server, | |
414 | &pool_start, 32); | |
415 | if (r < 0) | |
416 | return r; | |
417 | ||
418 | /* TODO: | |
419 | r = sd_dhcp_server_set_router(link->dhcp_server, | |
420 | &main_address->in_addr.in); | |
421 | if (r < 0) | |
422 | return r; | |
423 | ||
424 | r = sd_dhcp_server_set_prefixlen(link->dhcp_server, | |
425 | main_address->prefixlen); | |
426 | if (r < 0) | |
427 | return r; | |
428 | */ | |
429 | ||
430 | r = sd_dhcp_server_start(link->dhcp_server); | |
431 | if (r < 0) { | |
432 | log_warning_link(link, "could not start DHCPv4 server " | |
433 | "instance: %s", strerror(-r)); | |
434 | ||
435 | link_enter_failed(link); | |
436 | ||
437 | return 0; | |
438 | } | |
439 | } | |
440 | ||
441 | log_info_link(link, "link configured"); | |
442 | ||
443 | link->state = LINK_STATE_CONFIGURED; | |
444 | ||
445 | link_save(link); | |
446 | ||
447 | return 0; | |
448 | } | |
449 | ||
450 | void link_client_handler(Link *link) { | |
451 | assert(link); | |
452 | assert(link->network); | |
453 | ||
454 | if (!link->static_configured) | |
455 | return; | |
456 | ||
457 | if (link->network->ipv4ll) | |
458 | if (!link->ipv4ll_address || | |
459 | !link->ipv4ll_route) | |
460 | return; | |
461 | ||
462 | if (IN_SET(link->network->dhcp, DHCP_SUPPORT_BOTH, DHCP_SUPPORT_V4)) | |
463 | if (!link->dhcp4_configured) | |
464 | return; | |
465 | ||
466 | if (link->state != LINK_STATE_CONFIGURED) | |
467 | link_enter_configured(link); | |
468 | ||
469 | return; | |
470 | } | |
471 | ||
472 | static int route_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { | |
473 | _cleanup_link_unref_ Link *link = userdata; | |
474 | int r; | |
475 | ||
476 | assert(link->link_messages > 0); | |
477 | assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES, | |
478 | LINK_STATE_SETTING_ROUTES, LINK_STATE_FAILED, | |
479 | LINK_STATE_LINGER)); | |
480 | ||
481 | link->link_messages --; | |
482 | ||
483 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
484 | return 1; | |
485 | ||
486 | r = sd_rtnl_message_get_errno(m); | |
487 | if (r < 0 && r != -EEXIST) | |
488 | log_struct_link(LOG_WARNING, link, | |
489 | "MESSAGE=%-*s: could not set route: %s", | |
490 | IFNAMSIZ, | |
491 | link->ifname, strerror(-r), | |
492 | "ERRNO=%d", -r, | |
493 | NULL); | |
494 | ||
495 | if (link->link_messages == 0) { | |
496 | log_debug_link(link, "routes set"); | |
497 | link->static_configured = true; | |
498 | link_client_handler(link); | |
499 | } | |
500 | ||
501 | return 1; | |
502 | } | |
503 | ||
504 | static int link_enter_set_routes(Link *link) { | |
505 | Route *rt; | |
506 | int r; | |
507 | ||
508 | assert(link); | |
509 | assert(link->network); | |
510 | assert(link->state == LINK_STATE_SETTING_ADDRESSES); | |
511 | ||
512 | link->state = LINK_STATE_SETTING_ROUTES; | |
513 | ||
514 | LIST_FOREACH(routes, rt, link->network->static_routes) { | |
515 | r = route_configure(rt, link, &route_handler); | |
516 | if (r < 0) { | |
517 | log_warning_link(link, | |
518 | "could not set routes: %s", | |
519 | strerror(-r)); | |
520 | link_enter_failed(link); | |
521 | return r; | |
522 | } | |
523 | ||
524 | link->link_messages ++; | |
525 | } | |
526 | ||
527 | if (link->link_messages == 0) { | |
528 | link->static_configured = true; | |
529 | link_client_handler(link); | |
530 | } else | |
531 | log_debug_link(link, "setting routes"); | |
532 | ||
533 | return 0; | |
534 | } | |
535 | ||
536 | int link_route_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { | |
537 | _cleanup_link_unref_ Link *link = userdata; | |
538 | int r; | |
539 | ||
540 | assert(m); | |
541 | assert(link); | |
542 | assert(link->ifname); | |
543 | ||
544 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
545 | return 1; | |
546 | ||
547 | r = sd_rtnl_message_get_errno(m); | |
548 | if (r < 0 && r != -ESRCH) | |
549 | log_struct_link(LOG_WARNING, link, | |
550 | "MESSAGE=%-*s: could not drop route: %s", | |
551 | IFNAMSIZ, | |
552 | link->ifname, strerror(-r), | |
553 | "ERRNO=%d", -r, | |
554 | NULL); | |
555 | ||
556 | return 1; | |
557 | } | |
558 | ||
559 | int link_get_address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { | |
560 | _cleanup_link_unref_ Link *link = userdata; | |
561 | int r; | |
562 | ||
563 | assert(rtnl); | |
564 | assert(m); | |
565 | assert(link); | |
566 | assert(link->manager); | |
567 | ||
568 | for (; m; m = sd_rtnl_message_next(m)) { | |
569 | r = sd_rtnl_message_get_errno(m); | |
570 | if (r < 0) { | |
571 | log_debug_link(link, "getting address failed: %s", | |
572 | strerror(-r)); | |
573 | continue; | |
574 | } | |
575 | ||
576 | r = link_rtnl_process_address(rtnl, m, link->manager); | |
577 | if (r < 0) | |
578 | log_warning_link(link, "could not process address: %s", | |
579 | strerror(-r)); | |
580 | } | |
581 | ||
582 | return 1; | |
583 | } | |
584 | ||
585 | static int address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { | |
586 | _cleanup_link_unref_ Link *link = userdata; | |
587 | int r; | |
588 | ||
589 | assert(rtnl); | |
590 | assert(m); | |
591 | assert(link); | |
592 | assert(link->ifname); | |
593 | assert(link->link_messages > 0); | |
594 | assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES, | |
595 | LINK_STATE_FAILED, LINK_STATE_LINGER)); | |
596 | ||
597 | link->link_messages --; | |
598 | ||
599 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
600 | return 1; | |
601 | ||
602 | r = sd_rtnl_message_get_errno(m); | |
603 | if (r < 0 && r != -EEXIST) | |
604 | log_struct_link(LOG_WARNING, link, | |
605 | "MESSAGE=%-*s: could not set address: %s", | |
606 | IFNAMSIZ, | |
607 | link->ifname, strerror(-r), | |
608 | "ERRNO=%d", -r, | |
609 | NULL); | |
610 | else if (r >= 0) { | |
611 | /* calling handler directly so take a ref */ | |
612 | link_ref(link); | |
613 | link_get_address_handler(rtnl, m, link); | |
614 | } | |
615 | ||
616 | if (link->link_messages == 0) { | |
617 | log_debug_link(link, "addresses set"); | |
618 | link_enter_set_routes(link); | |
619 | } | |
620 | ||
621 | return 1; | |
622 | } | |
623 | ||
624 | static int link_enter_set_addresses(Link *link) { | |
625 | Address *ad; | |
626 | int r; | |
627 | ||
628 | assert(link); | |
629 | assert(link->network); | |
630 | assert(link->state != _LINK_STATE_INVALID); | |
631 | ||
632 | link->state = LINK_STATE_SETTING_ADDRESSES; | |
633 | ||
634 | LIST_FOREACH(addresses, ad, link->network->static_addresses) { | |
635 | r = address_configure(ad, link, &address_handler); | |
636 | if (r < 0) { | |
637 | log_warning_link(link, | |
638 | "could not set addresses: %s", | |
639 | strerror(-r)); | |
640 | link_enter_failed(link); | |
641 | return r; | |
642 | } | |
643 | ||
644 | link->link_messages ++; | |
645 | } | |
646 | ||
647 | if (link->link_messages == 0) { | |
648 | link_enter_set_routes(link); | |
649 | } else | |
650 | log_debug_link(link, "setting addresses"); | |
651 | ||
652 | return 0; | |
653 | } | |
654 | ||
655 | int link_address_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { | |
656 | _cleanup_link_unref_ Link *link = userdata; | |
657 | int r; | |
658 | ||
659 | assert(m); | |
660 | assert(link); | |
661 | assert(link->ifname); | |
662 | ||
663 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
664 | return 1; | |
665 | ||
666 | r = sd_rtnl_message_get_errno(m); | |
667 | if (r < 0 && r != -EADDRNOTAVAIL) | |
668 | log_struct_link(LOG_WARNING, link, | |
669 | "MESSAGE=%-*s: could not drop address: %s", | |
670 | IFNAMSIZ, | |
671 | link->ifname, strerror(-r), | |
672 | "ERRNO=%d", -r, | |
673 | NULL); | |
674 | ||
675 | return 1; | |
676 | } | |
677 | ||
678 | static int set_hostname_handler(sd_bus *bus, sd_bus_message *m, void *userdata, | |
679 | sd_bus_error *ret_error) { | |
680 | _cleanup_link_unref_ Link *link = userdata; | |
681 | int r; | |
682 | ||
683 | assert(link); | |
684 | ||
685 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
686 | return 1; | |
687 | ||
688 | r = sd_bus_message_get_errno(m); | |
689 | if (r < 0) | |
690 | r = -r; | |
691 | if (r > 0) | |
692 | log_warning_link(link, "Could not set hostname: %s", | |
693 | strerror(r)); | |
694 | ||
695 | return 1; | |
696 | } | |
697 | ||
698 | int link_set_hostname(Link *link, const char *hostname) { | |
699 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
700 | int r = 0; | |
701 | ||
702 | assert(link); | |
703 | assert(link->manager); | |
704 | assert(hostname); | |
705 | ||
706 | log_debug_link(link, "Setting transient hostname: '%s'", hostname); | |
707 | ||
708 | if (!link->manager->bus) { | |
709 | /* TODO: replace by assert when we can rely on kdbus */ | |
710 | log_info_link(link, | |
711 | "Not connected to system bus, ignoring transient hostname."); | |
712 | return 0; | |
713 | } | |
714 | ||
715 | r = sd_bus_message_new_method_call( | |
716 | link->manager->bus, | |
717 | &m, | |
718 | "org.freedesktop.hostname1", | |
719 | "/org/freedesktop/hostname1", | |
720 | "org.freedesktop.hostname1", | |
721 | "SetHostname"); | |
722 | if (r < 0) | |
723 | return r; | |
724 | ||
725 | r = sd_bus_message_append(m, "sb", hostname, false); | |
726 | if (r < 0) | |
727 | return r; | |
728 | ||
729 | r = sd_bus_call_async(link->manager->bus, NULL, m, set_hostname_handler, | |
730 | link, 0); | |
731 | if (r < 0) { | |
732 | log_error_link(link, "Could not set transient hostname: %s", | |
733 | strerror(-r)); | |
734 | return r; | |
735 | } | |
736 | ||
737 | link_ref(link); | |
738 | ||
739 | return 0; | |
740 | } | |
741 | ||
742 | static int set_mtu_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { | |
743 | _cleanup_link_unref_ Link *link = userdata; | |
744 | int r; | |
745 | ||
746 | assert(m); | |
747 | assert(link); | |
748 | assert(link->ifname); | |
749 | ||
750 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
751 | return 1; | |
752 | ||
753 | r = sd_rtnl_message_get_errno(m); | |
754 | if (r < 0) | |
755 | log_struct_link(LOG_WARNING, link, | |
756 | "MESSAGE=%-*s: could not set MTU: %s", | |
757 | IFNAMSIZ, link->ifname, strerror(-r), | |
758 | "ERRNO=%d", -r, | |
759 | NULL); | |
760 | ||
761 | return 1; | |
762 | } | |
763 | ||
764 | int link_set_mtu(Link *link, uint32_t mtu) { | |
765 | _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL; | |
766 | int r; | |
767 | ||
768 | assert(link); | |
769 | assert(link->manager); | |
770 | assert(link->manager->rtnl); | |
771 | ||
772 | log_debug_link(link, "setting MTU: %" PRIu32, mtu); | |
773 | ||
774 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, | |
775 | RTM_SETLINK, link->ifindex); | |
776 | if (r < 0) { | |
777 | log_error_link(link, "Could not allocate RTM_SETLINK message"); | |
778 | return r; | |
779 | } | |
780 | ||
781 | r = sd_rtnl_message_append_u32(req, IFLA_MTU, mtu); | |
782 | if (r < 0) { | |
783 | log_error_link(link, "Could not append MTU: %s", strerror(-r)); | |
784 | return r; | |
785 | } | |
786 | ||
787 | r = sd_rtnl_call_async(link->manager->rtnl, req, set_mtu_handler, link, | |
788 | 0, NULL); | |
789 | if (r < 0) { | |
790 | log_error_link(link, | |
791 | "Could not send rtnetlink message: %s", | |
792 | strerror(-r)); | |
793 | return r; | |
794 | } | |
795 | ||
796 | link_ref(link); | |
797 | ||
798 | return 0; | |
799 | } | |
800 | ||
801 | static void dhcp6_handler(sd_dhcp6_client *client, int event, void *userdata) { | |
802 | Link *link = userdata; | |
803 | ||
804 | assert(link); | |
805 | assert(link->network); | |
806 | assert(link->manager); | |
807 | ||
808 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
809 | return; | |
810 | ||
811 | switch(event) { | |
812 | case DHCP6_EVENT_STOP: | |
813 | case DHCP6_EVENT_RESEND_EXPIRE: | |
814 | case DHCP6_EVENT_RETRANS_MAX: | |
815 | case DHCP6_EVENT_IP_ACQUIRE: | |
816 | log_debug_link(link, "DHCPv6 event %d", event); | |
817 | ||
818 | break; | |
819 | ||
820 | default: | |
821 | if (event < 0) | |
822 | log_warning_link(link, "DHCPv6 error: %s", | |
823 | strerror(-event)); | |
824 | else | |
825 | log_warning_link(link, "DHCPv6 unknown event: %d", | |
826 | event); | |
827 | return; | |
828 | } | |
829 | } | |
830 | ||
831 | static void icmp6_router_handler(sd_icmp6_nd *nd, int event, void *userdata) { | |
832 | Link *link = userdata; | |
833 | int r; | |
834 | ||
835 | assert(link); | |
836 | assert(link->network); | |
837 | assert(link->manager); | |
838 | ||
839 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
840 | return; | |
841 | ||
842 | switch(event) { | |
843 | case ICMP6_EVENT_ROUTER_ADVERTISMENT_NONE: | |
844 | case ICMP6_EVENT_ROUTER_ADVERTISMENT_OTHER: | |
845 | return; | |
846 | ||
847 | case ICMP6_EVENT_ROUTER_ADVERTISMENT_TIMEOUT: | |
848 | case ICMP6_EVENT_ROUTER_ADVERTISMENT_MANAGED: | |
849 | break; | |
850 | ||
851 | default: | |
852 | if (event < 0) | |
853 | log_warning_link(link, "ICMPv6 error: %s", | |
854 | strerror(-event)); | |
855 | else | |
856 | log_warning_link(link, "ICMPv6 unknown event: %d", | |
857 | event); | |
858 | ||
859 | return; | |
860 | } | |
861 | ||
862 | if (link->dhcp6_client) | |
863 | return; | |
864 | ||
865 | r = sd_dhcp6_client_new(&link->dhcp6_client); | |
866 | if (r < 0) | |
867 | return; | |
868 | ||
869 | r = sd_dhcp6_client_attach_event(link->dhcp6_client, NULL, 0); | |
870 | if (r < 0) { | |
871 | link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client); | |
872 | return; | |
873 | } | |
874 | ||
875 | r = sd_dhcp6_client_set_mac(link->dhcp6_client, &link->mac); | |
876 | if (r < 0) { | |
877 | link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client); | |
878 | return; | |
879 | } | |
880 | ||
881 | r = sd_dhcp6_client_set_index(link->dhcp6_client, link->ifindex); | |
882 | if (r < 0) { | |
883 | link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client); | |
884 | return; | |
885 | } | |
886 | ||
887 | r = sd_dhcp6_client_set_callback(link->dhcp6_client, dhcp6_handler, | |
888 | link); | |
889 | if (r < 0) { | |
890 | link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client); | |
891 | return; | |
892 | } | |
893 | ||
894 | r = sd_dhcp6_client_start(link->dhcp6_client); | |
895 | if (r < 0) | |
896 | link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client); | |
897 | } | |
898 | ||
899 | static int link_acquire_conf(Link *link) { | |
900 | int r; | |
901 | ||
902 | assert(link); | |
903 | assert(link->network); | |
904 | assert(link->manager); | |
905 | assert(link->manager->event); | |
906 | ||
907 | if (link->network->ipv4ll) { | |
908 | assert(link->ipv4ll); | |
909 | ||
910 | log_debug_link(link, "acquiring IPv4 link-local address"); | |
911 | ||
912 | r = sd_ipv4ll_start(link->ipv4ll); | |
913 | if (r < 0) { | |
914 | log_warning_link(link, "could not acquire IPv4 " | |
915 | "link-local address"); | |
916 | return r; | |
917 | } | |
918 | } | |
919 | ||
920 | if (IN_SET(link->network->dhcp, DHCP_SUPPORT_BOTH, DHCP_SUPPORT_V4)) { | |
921 | assert(link->dhcp_client); | |
922 | ||
923 | log_debug_link(link, "acquiring DHCPv4 lease"); | |
924 | ||
925 | r = sd_dhcp_client_start(link->dhcp_client); | |
926 | if (r < 0) { | |
927 | log_warning_link(link, "could not acquire DHCPv4 " | |
928 | "lease"); | |
929 | return r; | |
930 | } | |
931 | } | |
932 | ||
933 | if (IN_SET(link->network->dhcp, DHCP_SUPPORT_BOTH, DHCP_SUPPORT_V6)) { | |
934 | assert(link->icmp6_router_discovery); | |
935 | ||
936 | log_debug_link(link, "discovering IPv6 routers"); | |
937 | ||
938 | r = sd_icmp6_router_solicitation_start(link->icmp6_router_discovery); | |
939 | if (r < 0) { | |
940 | log_warning_link(link, | |
941 | "could not start IPv6 router discovery"); | |
942 | return r; | |
943 | } | |
944 | } | |
945 | ||
946 | return 0; | |
947 | } | |
948 | ||
949 | bool link_has_carrier(Link *link) { | |
950 | /* see Documentation/networking/operstates.txt in the kernel sources */ | |
951 | ||
952 | if (link->kernel_operstate == IF_OPER_UP) | |
953 | return true; | |
954 | ||
955 | if (link->kernel_operstate == IF_OPER_UNKNOWN) | |
956 | /* operstate may not be implemented, so fall back to flags */ | |
957 | if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT)) | |
958 | return true; | |
959 | ||
960 | return false; | |
961 | } | |
962 | ||
963 | static int link_up_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { | |
964 | _cleanup_link_unref_ Link *link = userdata; | |
965 | int r; | |
966 | ||
967 | assert(link); | |
968 | ||
969 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
970 | return 1; | |
971 | ||
972 | r = sd_rtnl_message_get_errno(m); | |
973 | if (r < 0) { | |
974 | /* we warn but don't fail the link, as it may | |
975 | be brought up later */ | |
976 | log_struct_link(LOG_WARNING, link, | |
977 | "MESSAGE=%-*s: could not bring up interface: %s", | |
978 | IFNAMSIZ, | |
979 | link->ifname, strerror(-r), | |
980 | "ERRNO=%d", -r, | |
981 | NULL); | |
982 | } | |
983 | ||
984 | return 1; | |
985 | } | |
986 | ||
987 | static int link_up(Link *link) { | |
988 | _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL; | |
989 | int r; | |
990 | ||
991 | assert(link); | |
992 | assert(link->manager); | |
993 | assert(link->manager->rtnl); | |
994 | ||
995 | log_debug_link(link, "bringing link up"); | |
996 | ||
997 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, | |
998 | RTM_SETLINK, link->ifindex); | |
999 | if (r < 0) { | |
1000 | log_error_link(link, "Could not allocate RTM_SETLINK message"); | |
1001 | return r; | |
1002 | } | |
1003 | ||
1004 | r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP); | |
1005 | if (r < 0) { | |
1006 | log_error_link(link, "Could not set link flags: %s", | |
1007 | strerror(-r)); | |
1008 | return r; | |
1009 | } | |
1010 | ||
1011 | r = sd_rtnl_call_async(link->manager->rtnl, req, link_up_handler, link, | |
1012 | 0, NULL); | |
1013 | if (r < 0) { | |
1014 | log_error_link(link, | |
1015 | "Could not send rtnetlink message: %s", | |
1016 | strerror(-r)); | |
1017 | return r; | |
1018 | } | |
1019 | ||
1020 | link_ref(link); | |
1021 | ||
1022 | return 0; | |
1023 | } | |
1024 | ||
1025 | static int link_joined(Link *link) { | |
1026 | int r; | |
1027 | ||
1028 | assert(link); | |
1029 | assert(link->network); | |
1030 | ||
1031 | if (!(link->flags & IFF_UP)) { | |
1032 | r = link_up(link); | |
1033 | if (r < 0) { | |
1034 | link_enter_failed(link); | |
1035 | return r; | |
1036 | } | |
1037 | } | |
1038 | ||
1039 | return link_enter_set_addresses(link); | |
1040 | } | |
1041 | ||
1042 | static int netdev_join_handler(sd_rtnl *rtnl, sd_rtnl_message *m, | |
1043 | void *userdata) { | |
1044 | _cleanup_link_unref_ Link *link = userdata; | |
1045 | int r; | |
1046 | ||
1047 | assert(link); | |
1048 | assert(link->network); | |
1049 | ||
1050 | link->enslaving --; | |
1051 | ||
1052 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
1053 | return 1; | |
1054 | ||
1055 | r = sd_rtnl_message_get_errno(m); | |
1056 | if (r < 0 && r != -EEXIST) { | |
1057 | log_struct_link(LOG_ERR, link, | |
1058 | "MESSAGE=%-*s: could not join netdev: %s", | |
1059 | IFNAMSIZ, | |
1060 | link->ifname, strerror(-r), | |
1061 | "ERRNO=%d", -r, | |
1062 | NULL); | |
1063 | link_enter_failed(link); | |
1064 | return 1; | |
1065 | } else | |
1066 | log_debug_link(link, "joined netdev"); | |
1067 | ||
1068 | if (link->enslaving <= 0) | |
1069 | link_joined(link); | |
1070 | ||
1071 | return 1; | |
1072 | } | |
1073 | ||
1074 | static int link_enter_join_netdev(Link *link) { | |
1075 | NetDev *netdev; | |
1076 | Iterator i; | |
1077 | int r; | |
1078 | ||
1079 | assert(link); | |
1080 | assert(link->network); | |
1081 | assert(link->state == LINK_STATE_PENDING); | |
1082 | ||
1083 | link->state = LINK_STATE_ENSLAVING; | |
1084 | ||
1085 | link_save(link); | |
1086 | ||
1087 | if (!link->network->bridge && | |
1088 | !link->network->bond && | |
1089 | hashmap_isempty(link->network->stacked_netdevs)) | |
1090 | return link_joined(link); | |
1091 | ||
1092 | if (link->network->bond) { | |
1093 | log_struct_link(LOG_DEBUG, link, | |
1094 | "MESSAGE=%-*s: enslaving by '%s'", | |
1095 | IFNAMSIZ, | |
1096 | link->ifname, link->network->bond->ifname, | |
1097 | NETDEVIF(link->network->bond), | |
1098 | NULL); | |
1099 | ||
1100 | r = netdev_join(link->network->bond, link, &netdev_join_handler); | |
1101 | if (r < 0) { | |
1102 | log_struct_link(LOG_WARNING, link, | |
1103 | "MESSAGE=%-*s: could not join netdev '%s': %s", | |
1104 | IFNAMSIZ, | |
1105 | link->ifname, link->network->bond->ifname, | |
1106 | strerror(-r), | |
1107 | NETDEVIF(link->network->bond), | |
1108 | NULL); | |
1109 | link_enter_failed(link); | |
1110 | return r; | |
1111 | } | |
1112 | ||
1113 | link->enslaving ++; | |
1114 | } | |
1115 | ||
1116 | if (link->network->bridge) { | |
1117 | log_struct_link(LOG_DEBUG, link, | |
1118 | "MESSAGE=%-*s: enslaving by '%s'", | |
1119 | IFNAMSIZ, | |
1120 | link->ifname, link->network->bridge->ifname, | |
1121 | NETDEVIF(link->network->bridge), | |
1122 | NULL); | |
1123 | ||
1124 | r = netdev_join(link->network->bridge, link, | |
1125 | &netdev_join_handler); | |
1126 | if (r < 0) { | |
1127 | log_struct_link(LOG_WARNING, link, | |
1128 | "MESSAGE=%-*s: could not join netdev '%s': %s", | |
1129 | IFNAMSIZ, | |
1130 | link->ifname, link->network->bridge->ifname, | |
1131 | strerror(-r), | |
1132 | NETDEVIF(link->network->bridge), | |
1133 | NULL); | |
1134 | link_enter_failed(link); | |
1135 | return r; | |
1136 | } | |
1137 | ||
1138 | link->enslaving ++; | |
1139 | } | |
1140 | ||
1141 | HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) { | |
1142 | log_struct_link(LOG_DEBUG, link, | |
1143 | "MESSAGE=%-*s: enslaving by '%s'", | |
1144 | IFNAMSIZ, | |
1145 | link->ifname, netdev->ifname, NETDEVIF(netdev), | |
1146 | NULL); | |
1147 | ||
1148 | r = netdev_join(netdev, link, &netdev_join_handler); | |
1149 | if (r < 0) { | |
1150 | log_struct_link(LOG_WARNING, link, | |
1151 | "MESSAGE=%-*s: could not join netdev '%s': %s", | |
1152 | IFNAMSIZ, | |
1153 | link->ifname, netdev->ifname, | |
1154 | strerror(-r), | |
1155 | NETDEVIF(netdev), NULL); | |
1156 | link_enter_failed(link); | |
1157 | return r; | |
1158 | } | |
1159 | ||
1160 | link->enslaving ++; | |
1161 | } | |
1162 | ||
1163 | return 0; | |
1164 | } | |
1165 | ||
1166 | static int link_configure(Link *link) { | |
1167 | int r; | |
1168 | ||
1169 | assert(link); | |
1170 | assert(link->network); | |
1171 | assert(link->state == LINK_STATE_PENDING); | |
1172 | ||
1173 | if (link->network->ipv4ll) { | |
1174 | r = ipv4ll_configure(link); | |
1175 | if (r < 0) | |
1176 | return r; | |
1177 | } | |
1178 | ||
1179 | if (IN_SET(link->network->dhcp, DHCP_SUPPORT_BOTH, DHCP_SUPPORT_V4)) { | |
1180 | r = dhcp4_configure(link); | |
1181 | if (r < 0) | |
1182 | return r; | |
1183 | } | |
1184 | ||
1185 | if (link->network->dhcp_server) { | |
1186 | r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex); | |
1187 | if (r < 0) | |
1188 | return r; | |
1189 | ||
1190 | r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0); | |
1191 | if (r < 0) | |
1192 | return r; | |
1193 | } | |
1194 | ||
1195 | if (IN_SET(link->network->dhcp, DHCP_SUPPORT_BOTH, DHCP_SUPPORT_V6)) { | |
1196 | r = sd_icmp6_nd_new(&link->icmp6_router_discovery); | |
1197 | if (r < 0) | |
1198 | return r; | |
1199 | ||
1200 | r = sd_icmp6_nd_attach_event(link->icmp6_router_discovery, | |
1201 | NULL, 0); | |
1202 | if (r < 0) | |
1203 | return r; | |
1204 | ||
1205 | r = sd_icmp6_nd_set_mac(link->icmp6_router_discovery, | |
1206 | &link->mac); | |
1207 | if (r < 0) | |
1208 | return r; | |
1209 | ||
1210 | r = sd_icmp6_nd_set_index(link->icmp6_router_discovery, | |
1211 | link->ifindex); | |
1212 | if (r < 0) | |
1213 | return r; | |
1214 | ||
1215 | r = sd_icmp6_nd_set_callback(link->icmp6_router_discovery, | |
1216 | icmp6_router_handler, link); | |
1217 | if (r < 0) | |
1218 | return r; | |
1219 | } | |
1220 | ||
1221 | if (link_has_carrier(link)) { | |
1222 | r = link_acquire_conf(link); | |
1223 | if (r < 0) | |
1224 | return r; | |
1225 | } | |
1226 | ||
1227 | return link_enter_join_netdev(link); | |
1228 | } | |
1229 | ||
1230 | static int link_initialized_and_synced(sd_rtnl *rtnl, sd_rtnl_message *m, | |
1231 | void *userdata) { | |
1232 | _cleanup_link_unref_ Link *link = userdata; | |
1233 | Network *network; | |
1234 | int r; | |
1235 | ||
1236 | assert(link); | |
1237 | assert(link->ifname); | |
1238 | assert(link->manager); | |
1239 | ||
1240 | if (link->state != LINK_STATE_PENDING) | |
1241 | return 1; | |
1242 | ||
1243 | log_debug_link(link, "link state is up-to-date"); | |
1244 | ||
1245 | r = network_get(link->manager, link->udev_device, link->ifname, | |
1246 | &link->mac, &network); | |
1247 | if (r == -ENOENT) { | |
1248 | link_enter_unmanaged(link); | |
1249 | return 1; | |
1250 | } else if (r < 0) | |
1251 | return r; | |
1252 | ||
1253 | if (link->flags & IFF_LOOPBACK) { | |
1254 | log_debug_link(link, "matching network ignored for loopback link"); | |
1255 | link_enter_unmanaged(link); | |
1256 | return 1; | |
1257 | } | |
1258 | ||
1259 | r = network_apply(link->manager, network, link); | |
1260 | if (r < 0) | |
1261 | return r; | |
1262 | ||
1263 | r = link_configure(link); | |
1264 | if (r < 0) | |
1265 | return r; | |
1266 | ||
1267 | return 1; | |
1268 | } | |
1269 | ||
1270 | int link_initialized(Link *link, struct udev_device *device) { | |
1271 | _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL; | |
1272 | int r; | |
1273 | ||
1274 | assert(link); | |
1275 | assert(link->manager); | |
1276 | assert(link->manager->rtnl); | |
1277 | assert(device); | |
1278 | ||
1279 | if (link->state != LINK_STATE_PENDING) | |
1280 | return 0; | |
1281 | ||
1282 | if (link->udev_device) | |
1283 | return 0; | |
1284 | ||
1285 | log_debug_link(link, "udev initialized link"); | |
1286 | ||
1287 | link->udev_device = udev_device_ref(device); | |
1288 | ||
1289 | /* udev has initialized the link, but we don't know if we have yet | |
1290 | * processed the NEWLINK messages with the latest state. Do a GETLINK, | |
1291 | * when it returns we know that the pending NEWLINKs have already been | |
1292 | * processed and that we are up-to-date */ | |
1293 | ||
1294 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK, | |
1295 | link->ifindex); | |
1296 | if (r < 0) | |
1297 | return r; | |
1298 | ||
1299 | r = sd_rtnl_call_async(link->manager->rtnl, req, | |
1300 | link_initialized_and_synced, link, 0, NULL); | |
1301 | if (r < 0) | |
1302 | return r; | |
1303 | ||
1304 | link_ref(link); | |
1305 | ||
1306 | return 0; | |
1307 | } | |
1308 | ||
1309 | int link_rtnl_process_address(sd_rtnl *rtnl, sd_rtnl_message *message, | |
1310 | void *userdata) { | |
1311 | Manager *m = userdata; | |
1312 | Link *link = NULL; | |
1313 | uint16_t type; | |
1314 | _cleanup_address_free_ Address *address = NULL; | |
1315 | Address *ad; | |
1316 | char buf[INET6_ADDRSTRLEN]; | |
1317 | char valid_buf[FORMAT_TIMESPAN_MAX]; | |
1318 | const char *valid_str = NULL; | |
1319 | bool address_dropped = false; | |
1320 | int r, ifindex; | |
1321 | ||
1322 | assert(rtnl); | |
1323 | assert(message); | |
1324 | assert(m); | |
1325 | ||
1326 | r = sd_rtnl_message_get_type(message, &type); | |
1327 | if (r < 0) { | |
1328 | log_warning("rtnl: could not get message type"); | |
1329 | return 0; | |
1330 | } | |
1331 | ||
1332 | r = sd_rtnl_message_addr_get_ifindex(message, &ifindex); | |
1333 | if (r < 0 || ifindex <= 0) { | |
1334 | log_warning("rtnl: received address message without valid ifindex, ignoring"); | |
1335 | return 0; | |
1336 | } else { | |
1337 | r = link_get(m, ifindex, &link); | |
1338 | if (r < 0 || !link) { | |
1339 | log_warning("rtnl: received address for a nonexistent link (%d), ignoring", ifindex); | |
1340 | return 0; | |
1341 | } | |
1342 | } | |
1343 | ||
1344 | r = address_new_dynamic(&address); | |
1345 | if (r < 0) | |
1346 | return r; | |
1347 | ||
1348 | r = sd_rtnl_message_addr_get_family(message, &address->family); | |
1349 | if (r < 0 || !IN_SET(address->family, AF_INET, AF_INET6)) { | |
1350 | log_warning_link(link, | |
1351 | "rtnl: received address with invalid family, ignoring"); | |
1352 | return 0; | |
1353 | } | |
1354 | ||
1355 | r = sd_rtnl_message_addr_get_prefixlen(message, &address->prefixlen); | |
1356 | if (r < 0) { | |
1357 | log_warning_link(link, | |
1358 | "rtnl: received address with invalid prefixlen, ignoring"); | |
1359 | return 0; | |
1360 | } | |
1361 | ||
1362 | r = sd_rtnl_message_addr_get_scope(message, &address->scope); | |
1363 | if (r < 0) { | |
1364 | log_warning_link(link, | |
1365 | "rtnl: received address with invalid scope, ignoring"); | |
1366 | return 0; | |
1367 | } | |
1368 | ||
1369 | r = sd_rtnl_message_addr_get_flags(message, &address->flags); | |
1370 | if (r < 0) { | |
1371 | log_warning_link(link, | |
1372 | "rtnl: received address with invalid flags, ignoring"); | |
1373 | return 0; | |
1374 | } | |
1375 | ||
1376 | switch (address->family) { | |
1377 | case AF_INET: | |
1378 | r = sd_rtnl_message_read_in_addr(message, IFA_LOCAL, | |
1379 | &address->in_addr.in); | |
1380 | if (r < 0) { | |
1381 | log_warning_link(link, | |
1382 | "rtnl: received address without valid address, ignoring"); | |
1383 | return 0; | |
1384 | } | |
1385 | ||
1386 | break; | |
1387 | ||
1388 | case AF_INET6: | |
1389 | r = sd_rtnl_message_read_in6_addr(message, IFA_ADDRESS, | |
1390 | &address->in_addr.in6); | |
1391 | if (r < 0) { | |
1392 | log_warning_link(link, | |
1393 | "rtnl: received address without valid address, ignoring"); | |
1394 | return 0; | |
1395 | } | |
1396 | ||
1397 | break; | |
1398 | ||
1399 | default: | |
1400 | assert_not_reached("invalid address family"); | |
1401 | } | |
1402 | ||
1403 | if (!inet_ntop(address->family, &address->in_addr, buf, | |
1404 | INET6_ADDRSTRLEN)) { | |
1405 | log_warning_link(link, "could not print address"); | |
1406 | return 0; | |
1407 | } | |
1408 | ||
1409 | r = sd_rtnl_message_read_cache_info(message, IFA_CACHEINFO, | |
1410 | &address->cinfo); | |
1411 | if (r >= 0) { | |
1412 | if (address->cinfo.ifa_valid == CACHE_INFO_INFINITY_LIFE_TIME) | |
1413 | valid_str = "ever"; | |
1414 | else | |
1415 | valid_str = format_timespan(valid_buf, FORMAT_TIMESPAN_MAX, | |
1416 | address->cinfo.ifa_valid * USEC_PER_SEC, | |
1417 | USEC_PER_SEC); | |
1418 | } | |
1419 | ||
1420 | LIST_FOREACH(addresses, ad, link->addresses) { | |
1421 | if (address_equal(ad, address)) { | |
1422 | LIST_REMOVE(addresses, link->addresses, ad); | |
1423 | ||
1424 | address_free(ad); | |
1425 | ||
1426 | address_dropped = true; | |
1427 | ||
1428 | break; | |
1429 | } | |
1430 | } | |
1431 | ||
1432 | switch (type) { | |
1433 | case RTM_NEWADDR: | |
1434 | if (!address_dropped) | |
1435 | log_debug_link(link, "added address: %s/%u (valid for %s)", | |
1436 | buf, address->prefixlen, | |
1437 | strna(valid_str)); | |
1438 | else | |
1439 | log_debug_link(link, "updated address: %s/%u (valid for %s)", | |
1440 | buf, address->prefixlen, | |
1441 | strna(valid_str)); | |
1442 | ||
1443 | LIST_PREPEND(addresses, link->addresses, address); | |
1444 | address = NULL; | |
1445 | ||
1446 | link_save(link); | |
1447 | ||
1448 | break; | |
1449 | case RTM_DELADDR: | |
1450 | if (address_dropped) { | |
1451 | log_debug_link(link, "removed address: %s/%u (valid for %s)", | |
1452 | buf, address->prefixlen, | |
1453 | strna(valid_str)); | |
1454 | ||
1455 | link_save(link); | |
1456 | } else | |
1457 | log_warning_link(link, | |
1458 | "removing non-existent address: %s/%u (valid for %s)", | |
1459 | buf, address->prefixlen, | |
1460 | strna(valid_str)); | |
1461 | ||
1462 | break; | |
1463 | default: | |
1464 | assert_not_reached("Received invalid RTNL message type"); | |
1465 | } | |
1466 | ||
1467 | return 1; | |
1468 | } | |
1469 | ||
1470 | int link_add(Manager *m, sd_rtnl_message *message, Link **ret) { | |
1471 | Link *link; | |
1472 | _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL; | |
1473 | _cleanup_udev_device_unref_ struct udev_device *device = NULL; | |
1474 | char ifindex_str[2 + DECIMAL_STR_MAX(int)]; | |
1475 | int r; | |
1476 | ||
1477 | assert(m); | |
1478 | assert(m->rtnl); | |
1479 | assert(message); | |
1480 | assert(ret); | |
1481 | ||
1482 | r = link_new(m, message, ret); | |
1483 | if (r < 0) | |
1484 | return r; | |
1485 | ||
1486 | link = *ret; | |
1487 | ||
1488 | log_debug_link(link, "link %d added", link->ifindex); | |
1489 | ||
1490 | r = sd_rtnl_message_new_addr(m->rtnl, &req, RTM_GETADDR, link->ifindex, | |
1491 | 0); | |
1492 | if (r < 0) | |
1493 | return r; | |
1494 | ||
1495 | r = sd_rtnl_call_async(m->rtnl, req, link_get_address_handler, link, 0, | |
1496 | NULL); | |
1497 | if (r < 0) | |
1498 | return r; | |
1499 | ||
1500 | link_ref(link); | |
1501 | ||
1502 | if (detect_container(NULL) <= 0) { | |
1503 | /* not in a container, udev will be around */ | |
1504 | sprintf(ifindex_str, "n%d", link->ifindex); | |
1505 | device = udev_device_new_from_device_id(m->udev, ifindex_str); | |
1506 | if (!device) { | |
1507 | log_warning_link(link, | |
1508 | "could not find udev device: %m"); | |
1509 | return -errno; | |
1510 | } | |
1511 | ||
1512 | if (udev_device_get_is_initialized(device) <= 0) { | |
1513 | /* not yet ready */ | |
1514 | log_debug_link(link, "link pending udev initialization..."); | |
1515 | return 0; | |
1516 | } | |
1517 | ||
1518 | r = link_initialized(link, device); | |
1519 | if (r < 0) | |
1520 | return r; | |
1521 | } else { | |
1522 | /* we are calling a callback directly, so must take a ref */ | |
1523 | link_ref(link); | |
1524 | ||
1525 | r = link_initialized_and_synced(m->rtnl, NULL, link); | |
1526 | if (r < 0) | |
1527 | return r; | |
1528 | } | |
1529 | ||
1530 | return 0; | |
1531 | } | |
1532 | ||
1533 | int link_update(Link *link, sd_rtnl_message *m) { | |
1534 | struct ether_addr mac; | |
1535 | const char *ifname; | |
1536 | uint32_t mtu; | |
1537 | bool had_carrier, carrier_gained, carrier_lost; | |
1538 | int r; | |
1539 | ||
1540 | assert(link); | |
1541 | assert(link->ifname); | |
1542 | assert(m); | |
1543 | ||
1544 | if (link->state == LINK_STATE_LINGER) { | |
1545 | link_ref(link); | |
1546 | log_info_link(link, "link readded"); | |
1547 | link->state = LINK_STATE_ENSLAVING; | |
1548 | } | |
1549 | ||
1550 | r = sd_rtnl_message_read_string(m, IFLA_IFNAME, &ifname); | |
1551 | if (r >= 0 && !streq(ifname, link->ifname)) { | |
1552 | log_info_link(link, "renamed to %s", ifname); | |
1553 | ||
1554 | free(link->ifname); | |
1555 | link->ifname = strdup(ifname); | |
1556 | if (!link->ifname) | |
1557 | return -ENOMEM; | |
1558 | } | |
1559 | ||
1560 | r = sd_rtnl_message_read_u32(m, IFLA_MTU, &mtu); | |
1561 | if (r >= 0 && mtu > 0) { | |
1562 | link->mtu = mtu; | |
1563 | if (!link->original_mtu) { | |
1564 | link->original_mtu = mtu; | |
1565 | log_debug_link(link, "saved original MTU: %" | |
1566 | PRIu32, link->original_mtu); | |
1567 | } | |
1568 | ||
1569 | if (link->dhcp_client) { | |
1570 | r = sd_dhcp_client_set_mtu(link->dhcp_client, | |
1571 | link->mtu); | |
1572 | if (r < 0) { | |
1573 | log_warning_link(link, | |
1574 | "Could not update MTU in DHCP client: %s", | |
1575 | strerror(-r)); | |
1576 | return r; | |
1577 | } | |
1578 | } | |
1579 | } | |
1580 | ||
1581 | /* The kernel may broadcast NEWLINK messages without the MAC address | |
1582 | set, simply ignore them. */ | |
1583 | r = sd_rtnl_message_read_ether_addr(m, IFLA_ADDRESS, &mac); | |
1584 | if (r >= 0) { | |
1585 | if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet, | |
1586 | ETH_ALEN)) { | |
1587 | ||
1588 | memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet, | |
1589 | ETH_ALEN); | |
1590 | ||
1591 | log_debug_link(link, "MAC address: " | |
1592 | "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx", | |
1593 | mac.ether_addr_octet[0], | |
1594 | mac.ether_addr_octet[1], | |
1595 | mac.ether_addr_octet[2], | |
1596 | mac.ether_addr_octet[3], | |
1597 | mac.ether_addr_octet[4], | |
1598 | mac.ether_addr_octet[5]); | |
1599 | ||
1600 | if (link->ipv4ll) { | |
1601 | r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac); | |
1602 | if (r < 0) { | |
1603 | log_warning_link(link, | |
1604 | "Could not update MAC address in IPv4LL client: %s", | |
1605 | strerror(-r)); | |
1606 | return r; | |
1607 | } | |
1608 | } | |
1609 | ||
1610 | if (link->dhcp_client) { | |
1611 | r = sd_dhcp_client_set_mac(link->dhcp_client, | |
1612 | &link->mac); | |
1613 | if (r < 0) { | |
1614 | log_warning_link(link, | |
1615 | "Could not update MAC address in DHCP client: %s", | |
1616 | strerror(-r)); | |
1617 | return r; | |
1618 | } | |
1619 | } | |
1620 | ||
1621 | if (link->dhcp6_client) { | |
1622 | r = sd_dhcp6_client_set_mac(link->dhcp6_client, | |
1623 | &link->mac); | |
1624 | if (r < 0) { | |
1625 | log_warning_link(link, | |
1626 | "Could not update MAC address in DHCPv6 client: %s", | |
1627 | strerror(-r)); | |
1628 | return r; | |
1629 | } | |
1630 | } | |
1631 | } | |
1632 | } | |
1633 | ||
1634 | had_carrier = link_has_carrier(link); | |
1635 | ||
1636 | r = link_update_flags(link, m); | |
1637 | if (r < 0) | |
1638 | return r; | |
1639 | ||
1640 | carrier_gained = !had_carrier && link_has_carrier(link); | |
1641 | carrier_lost = had_carrier && !link_has_carrier(link); | |
1642 | ||
1643 | if (carrier_gained) { | |
1644 | log_info_link(link, "gained carrier"); | |
1645 | ||
1646 | if (link->network) { | |
1647 | r = link_acquire_conf(link); | |
1648 | if (r < 0) { | |
1649 | link_enter_failed(link); | |
1650 | return r; | |
1651 | } | |
1652 | } | |
1653 | } else if (carrier_lost) { | |
1654 | log_info_link(link, "lost carrier"); | |
1655 | ||
1656 | r = link_stop_clients(link); | |
1657 | if (r < 0) { | |
1658 | link_enter_failed(link); | |
1659 | return r; | |
1660 | } | |
1661 | } | |
1662 | ||
1663 | return 0; | |
1664 | } | |
1665 | ||
1666 | static void link_update_operstate(Link *link) { | |
1667 | ||
1668 | assert(link); | |
1669 | ||
1670 | if (link->kernel_operstate == IF_OPER_DORMANT) | |
1671 | link->operstate = LINK_OPERSTATE_DORMANT; | |
1672 | else if (link_has_carrier(link)) { | |
1673 | Address *address; | |
1674 | uint8_t scope = RT_SCOPE_NOWHERE; | |
1675 | ||
1676 | /* if we have carrier, check what addresses we have */ | |
1677 | LIST_FOREACH(addresses, address, link->addresses) { | |
1678 | if (address->flags & (IFA_F_TENTATIVE | IFA_F_DEPRECATED)) | |
1679 | continue; | |
1680 | ||
1681 | if (address->scope < scope) | |
1682 | scope = address->scope; | |
1683 | } | |
1684 | ||
1685 | if (scope < RT_SCOPE_SITE) | |
1686 | /* universally accessible addresses found */ | |
1687 | link->operstate = LINK_OPERSTATE_ROUTABLE; | |
1688 | else if (scope < RT_SCOPE_HOST) | |
1689 | /* only link or site local addresses found */ | |
1690 | link->operstate = LINK_OPERSTATE_DEGRADED; | |
1691 | else | |
1692 | /* no useful addresses found */ | |
1693 | link->operstate = LINK_OPERSTATE_CARRIER; | |
1694 | } else if (link->flags & IFF_UP) | |
1695 | link->operstate = LINK_OPERSTATE_NO_CARRIER; | |
1696 | else | |
1697 | link->operstate = LINK_OPERSTATE_OFF; | |
1698 | } | |
1699 | ||
1700 | int link_save(Link *link) { | |
1701 | _cleanup_free_ char *temp_path = NULL; | |
1702 | _cleanup_fclose_ FILE *f = NULL; | |
1703 | const char *admin_state, *oper_state; | |
1704 | int r; | |
1705 | ||
1706 | assert(link); | |
1707 | assert(link->state_file); | |
1708 | assert(link->lease_file); | |
1709 | assert(link->manager); | |
1710 | ||
1711 | link_update_operstate(link); | |
1712 | ||
1713 | r = manager_save(link->manager); | |
1714 | if (r < 0) | |
1715 | return r; | |
1716 | ||
1717 | if (link->state == LINK_STATE_LINGER) { | |
1718 | unlink(link->state_file); | |
1719 | return 0; | |
1720 | } | |
1721 | ||
1722 | admin_state = link_state_to_string(link->state); | |
1723 | assert(admin_state); | |
1724 | ||
1725 | oper_state = link_operstate_to_string(link->operstate); | |
1726 | assert(oper_state); | |
1727 | ||
1728 | r = fopen_temporary(link->state_file, &f, &temp_path); | |
1729 | if (r < 0) | |
1730 | return r; | |
1731 | ||
1732 | fchmod(fileno(f), 0644); | |
1733 | ||
1734 | fprintf(f, | |
1735 | "# This is private data. Do not parse.\n" | |
1736 | "ADMIN_STATE=%s\n" | |
1737 | "OPER_STATE=%s\n", | |
1738 | admin_state, oper_state); | |
1739 | ||
1740 | if (link->network) { | |
1741 | char **address, **domain; | |
1742 | bool space; | |
1743 | ||
1744 | fputs("DNS=", f); | |
1745 | space = false; | |
1746 | STRV_FOREACH(address, link->network->dns) { | |
1747 | if (space) | |
1748 | fputc(' ', f); | |
1749 | fputs(*address, f); | |
1750 | space = true; | |
1751 | } | |
1752 | ||
1753 | if (link->network->dhcp_dns && | |
1754 | link->dhcp_lease) { | |
1755 | const struct in_addr *addresses; | |
1756 | ||
1757 | r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses); | |
1758 | if (r > 0) { | |
1759 | if (space) | |
1760 | fputc(' ', f); | |
1761 | serialize_in_addrs(f, addresses, r); | |
1762 | } | |
1763 | } | |
1764 | ||
1765 | fputs("\n", f); | |
1766 | ||
1767 | fprintf(f, "NTP="); | |
1768 | space = false; | |
1769 | STRV_FOREACH(address, link->network->ntp) { | |
1770 | if (space) | |
1771 | fputc(' ', f); | |
1772 | fputs(*address, f); | |
1773 | space = true; | |
1774 | } | |
1775 | ||
1776 | if (link->network->dhcp_ntp && | |
1777 | link->dhcp_lease) { | |
1778 | const struct in_addr *addresses; | |
1779 | ||
1780 | r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses); | |
1781 | if (r > 0) { | |
1782 | if (space) | |
1783 | fputc(' ', f); | |
1784 | serialize_in_addrs(f, addresses, r); | |
1785 | } | |
1786 | } | |
1787 | ||
1788 | fputs("\n", f); | |
1789 | ||
1790 | fprintf(f, "DOMAINS="); | |
1791 | space = false; | |
1792 | STRV_FOREACH(domain, link->network->domains) { | |
1793 | if (space) | |
1794 | fputc(' ', f); | |
1795 | fputs(*domain, f); | |
1796 | space = true; | |
1797 | } | |
1798 | ||
1799 | if (link->network->dhcp_domains && | |
1800 | link->dhcp_lease) { | |
1801 | const char *domainname; | |
1802 | ||
1803 | r = sd_dhcp_lease_get_domainname(link->dhcp_lease, &domainname); | |
1804 | if (r >= 0) { | |
1805 | if (space) | |
1806 | fputc(' ', f); | |
1807 | fputs(domainname, f); | |
1808 | } | |
1809 | } | |
1810 | ||
1811 | fputs("\n", f); | |
1812 | ||
1813 | fprintf(f, "WILDCARD_DOMAIN=%s\n", | |
1814 | yes_no(link->network->wildcard_domain)); | |
1815 | ||
1816 | fprintf(f, "LLMNR=%s\n", | |
1817 | llmnr_support_to_string(link->network->llmnr)); | |
1818 | } | |
1819 | ||
1820 | if (link->dhcp_lease) { | |
1821 | assert(link->network); | |
1822 | ||
1823 | r = dhcp_lease_save(link->dhcp_lease, link->lease_file); | |
1824 | if (r < 0) | |
1825 | goto fail; | |
1826 | ||
1827 | fprintf(f, | |
1828 | "DHCP_LEASE=%s\n", | |
1829 | link->lease_file); | |
1830 | } else | |
1831 | unlink(link->lease_file); | |
1832 | ||
1833 | r = fflush_and_check(f); | |
1834 | if (r < 0) | |
1835 | goto fail; | |
1836 | ||
1837 | if (rename(temp_path, link->state_file) < 0) { | |
1838 | r = -errno; | |
1839 | goto fail; | |
1840 | } | |
1841 | ||
1842 | return 0; | |
1843 | fail: | |
1844 | log_error_link(link, "Failed to save link data to %s: %s", link->state_file, strerror(-r)); | |
1845 | unlink(link->state_file); | |
1846 | unlink(temp_path); | |
1847 | return r; | |
1848 | } | |
1849 | ||
1850 | static const char* const link_state_table[_LINK_STATE_MAX] = { | |
1851 | [LINK_STATE_PENDING] = "pending", | |
1852 | [LINK_STATE_ENSLAVING] = "configuring", | |
1853 | [LINK_STATE_SETTING_ADDRESSES] = "configuring", | |
1854 | [LINK_STATE_SETTING_ROUTES] = "configuring", | |
1855 | [LINK_STATE_CONFIGURED] = "configured", | |
1856 | [LINK_STATE_UNMANAGED] = "unmanaged", | |
1857 | [LINK_STATE_FAILED] = "failed", | |
1858 | [LINK_STATE_LINGER] = "linger", | |
1859 | }; | |
1860 | ||
1861 | DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState); | |
1862 | ||
1863 | static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = { | |
1864 | [LINK_OPERSTATE_OFF] = "off", | |
1865 | [LINK_OPERSTATE_NO_CARRIER] = "no-carrier", | |
1866 | [LINK_OPERSTATE_DORMANT] = "dormant", | |
1867 | [LINK_OPERSTATE_CARRIER] = "carrier", | |
1868 | [LINK_OPERSTATE_DEGRADED] = "degraded", | |
1869 | [LINK_OPERSTATE_ROUTABLE] = "routable", | |
1870 | }; | |
1871 | ||
1872 | DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState); |