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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 <sys/socket.h> | |
23 | #include <linux/if.h> | |
24 | ||
25 | #include "sd-netlink.h" | |
26 | #include "sd-daemon.h" | |
27 | ||
28 | #include "conf-parser.h" | |
29 | #include "path-util.h" | |
30 | #include "libudev-private.h" | |
31 | #include "udev-util.h" | |
32 | #include "netlink-util.h" | |
33 | #include "bus-util.h" | |
34 | #include "def.h" | |
35 | #include "virt.h" | |
36 | #include "set.h" | |
37 | ||
38 | #include "networkd.h" | |
39 | ||
40 | /* use 8 MB for receive socket kernel queue. */ | |
41 | #define RCVBUF_SIZE (8*1024*1024) | |
42 | ||
43 | const char* const network_dirs[] = { | |
44 | "/etc/systemd/network", | |
45 | "/run/systemd/network", | |
46 | "/usr/lib/systemd/network", | |
47 | #ifdef HAVE_SPLIT_USR | |
48 | "/lib/systemd/network", | |
49 | #endif | |
50 | NULL}; | |
51 | ||
52 | static int setup_default_address_pool(Manager *m) { | |
53 | AddressPool *p; | |
54 | int r; | |
55 | ||
56 | assert(m); | |
57 | ||
58 | /* Add in the well-known private address ranges. */ | |
59 | ||
60 | r = address_pool_new_from_string(m, &p, AF_INET6, "fc00::", 7); | |
61 | if (r < 0) | |
62 | return r; | |
63 | ||
64 | r = address_pool_new_from_string(m, &p, AF_INET, "192.168.0.0", 16); | |
65 | if (r < 0) | |
66 | return r; | |
67 | ||
68 | r = address_pool_new_from_string(m, &p, AF_INET, "172.16.0.0", 12); | |
69 | if (r < 0) | |
70 | return r; | |
71 | ||
72 | r = address_pool_new_from_string(m, &p, AF_INET, "10.0.0.0", 8); | |
73 | if (r < 0) | |
74 | return r; | |
75 | ||
76 | return 0; | |
77 | } | |
78 | ||
79 | static int on_bus_retry(sd_event_source *s, usec_t usec, void *userdata) { | |
80 | Manager *m = userdata; | |
81 | ||
82 | assert(s); | |
83 | assert(m); | |
84 | ||
85 | m->bus_retry_event_source = sd_event_source_unref(m->bus_retry_event_source); | |
86 | ||
87 | manager_connect_bus(m); | |
88 | ||
89 | return 0; | |
90 | } | |
91 | ||
92 | static int manager_reset_all(Manager *m) { | |
93 | Link *link; | |
94 | Iterator i; | |
95 | int r; | |
96 | ||
97 | assert(m); | |
98 | ||
99 | HASHMAP_FOREACH(link, m->links, i) { | |
100 | r = link_carrier_reset(link); | |
101 | if (r < 0) | |
102 | log_link_warning_errno(link, r, "Could not reset carrier: %m"); | |
103 | } | |
104 | ||
105 | return 0; | |
106 | } | |
107 | ||
108 | static int match_prepare_for_sleep(sd_bus_message *message, void *userdata, sd_bus_error *ret_error) { | |
109 | Manager *m = userdata; | |
110 | int b, r; | |
111 | ||
112 | assert(message); | |
113 | ||
114 | r = sd_bus_message_read(message, "b", &b); | |
115 | if (r < 0) { | |
116 | log_debug_errno(r, "Failed to parse PrepareForSleep signal: %m"); | |
117 | return 0; | |
118 | } | |
119 | ||
120 | if (b) | |
121 | return 0; | |
122 | ||
123 | log_debug("Coming back from suspend, resetting all connections..."); | |
124 | ||
125 | manager_reset_all(m); | |
126 | ||
127 | return 0; | |
128 | } | |
129 | ||
130 | int manager_connect_bus(Manager *m) { | |
131 | int r; | |
132 | ||
133 | assert(m); | |
134 | ||
135 | r = sd_bus_default_system(&m->bus); | |
136 | if (r == -ENOENT) { | |
137 | /* We failed to connect? Yuck, we must be in early | |
138 | * boot. Let's try in 5s again. As soon as we have | |
139 | * kdbus we can stop doing this... */ | |
140 | ||
141 | log_debug_errno(r, "Failed to connect to bus, trying again in 5s: %m"); | |
142 | ||
143 | r = sd_event_add_time(m->event, &m->bus_retry_event_source, CLOCK_MONOTONIC, now(CLOCK_MONOTONIC) + 5*USEC_PER_SEC, 0, on_bus_retry, m); | |
144 | if (r < 0) | |
145 | return log_error_errno(r, "Failed to install bus reconnect time event: %m"); | |
146 | ||
147 | return 0; | |
148 | } | |
149 | ||
150 | if (r < 0) | |
151 | return r; | |
152 | ||
153 | r = sd_bus_add_match(m->bus, &m->prepare_for_sleep_slot, | |
154 | "type='signal'," | |
155 | "sender='org.freedesktop.login1'," | |
156 | "interface='org.freedesktop.login1.Manager'," | |
157 | "member='PrepareForSleep'," | |
158 | "path='/org/freedesktop/login1'", | |
159 | match_prepare_for_sleep, | |
160 | m); | |
161 | if (r < 0) | |
162 | return log_error_errno(r, "Failed to add match for PrepareForSleep: %m"); | |
163 | ||
164 | r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/network1", "org.freedesktop.network1.Manager", manager_vtable, m); | |
165 | if (r < 0) | |
166 | return log_error_errno(r, "Failed to add manager object vtable: %m"); | |
167 | ||
168 | r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/network1/link", "org.freedesktop.network1.Link", link_vtable, link_object_find, m); | |
169 | if (r < 0) | |
170 | return log_error_errno(r, "Failed to add link object vtable: %m"); | |
171 | ||
172 | r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/network1/link", link_node_enumerator, m); | |
173 | if (r < 0) | |
174 | return log_error_errno(r, "Failed to add link enumerator: %m"); | |
175 | ||
176 | r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/network1/network", "org.freedesktop.network1.Network", network_vtable, network_object_find, m); | |
177 | if (r < 0) | |
178 | return log_error_errno(r, "Failed to add network object vtable: %m"); | |
179 | ||
180 | r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/network1/network", network_node_enumerator, m); | |
181 | if (r < 0) | |
182 | return log_error_errno(r, "Failed to add network enumerator: %m"); | |
183 | ||
184 | r = sd_bus_request_name(m->bus, "org.freedesktop.network1", 0); | |
185 | if (r < 0) | |
186 | return log_error_errno(r, "Failed to register name: %m"); | |
187 | ||
188 | r = sd_bus_attach_event(m->bus, m->event, 0); | |
189 | if (r < 0) | |
190 | return log_error_errno(r, "Failed to attach bus to event loop: %m"); | |
191 | ||
192 | return 0; | |
193 | } | |
194 | ||
195 | static int manager_udev_process_link(Manager *m, struct udev_device *device) { | |
196 | Link *link = NULL; | |
197 | int r, ifindex; | |
198 | ||
199 | assert(m); | |
200 | assert(device); | |
201 | ||
202 | if (!streq_ptr(udev_device_get_action(device), "add")) | |
203 | return 0; | |
204 | ||
205 | ifindex = udev_device_get_ifindex(device); | |
206 | if (ifindex <= 0) { | |
207 | log_debug("Ignoring udev ADD event for device with invalid ifindex"); | |
208 | return 0; | |
209 | } | |
210 | ||
211 | r = link_get(m, ifindex, &link); | |
212 | if (r == -ENODEV) | |
213 | return 0; | |
214 | else if (r < 0) | |
215 | return r; | |
216 | ||
217 | r = link_initialized(link, device); | |
218 | if (r < 0) | |
219 | return r; | |
220 | ||
221 | return 0; | |
222 | } | |
223 | ||
224 | static int manager_dispatch_link_udev(sd_event_source *source, int fd, uint32_t revents, void *userdata) { | |
225 | Manager *m = userdata; | |
226 | struct udev_monitor *monitor = m->udev_monitor; | |
227 | _cleanup_udev_device_unref_ struct udev_device *device = NULL; | |
228 | ||
229 | device = udev_monitor_receive_device(monitor); | |
230 | if (!device) | |
231 | return -ENOMEM; | |
232 | ||
233 | manager_udev_process_link(m, device); | |
234 | return 0; | |
235 | } | |
236 | ||
237 | static int manager_connect_udev(Manager *m) { | |
238 | int r; | |
239 | ||
240 | /* udev does not initialize devices inside containers, | |
241 | * so we rely on them being already initialized before | |
242 | * entering the container */ | |
243 | if (detect_container(NULL) > 0) | |
244 | return 0; | |
245 | ||
246 | m->udev = udev_new(); | |
247 | if (!m->udev) | |
248 | return -ENOMEM; | |
249 | ||
250 | m->udev_monitor = udev_monitor_new_from_netlink(m->udev, "udev"); | |
251 | if (!m->udev_monitor) | |
252 | return -ENOMEM; | |
253 | ||
254 | r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_monitor, "net", NULL); | |
255 | if (r < 0) | |
256 | return log_error_errno(r, "Could not add udev monitor filter: %m"); | |
257 | ||
258 | r = udev_monitor_enable_receiving(m->udev_monitor); | |
259 | if (r < 0) { | |
260 | log_error("Could not enable udev monitor"); | |
261 | return r; | |
262 | } | |
263 | ||
264 | r = sd_event_add_io(m->event, | |
265 | &m->udev_event_source, | |
266 | udev_monitor_get_fd(m->udev_monitor), | |
267 | EPOLLIN, manager_dispatch_link_udev, | |
268 | m); | |
269 | if (r < 0) | |
270 | return r; | |
271 | ||
272 | r = sd_event_source_set_description(m->udev_event_source, "networkd-udev"); | |
273 | if (r < 0) | |
274 | return r; | |
275 | ||
276 | return 0; | |
277 | } | |
278 | ||
279 | static int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) { | |
280 | Manager *m = userdata; | |
281 | Link *link = NULL; | |
282 | NetDev *netdev = NULL; | |
283 | uint16_t type; | |
284 | const char *name; | |
285 | int r, ifindex; | |
286 | ||
287 | assert(rtnl); | |
288 | assert(message); | |
289 | assert(m); | |
290 | ||
291 | if (sd_netlink_message_is_error(message)) { | |
292 | r = sd_netlink_message_get_errno(message); | |
293 | if (r < 0) | |
294 | log_warning_errno(r, "rtnl: Could not receive link: %m"); | |
295 | ||
296 | return 0; | |
297 | } | |
298 | ||
299 | r = sd_netlink_message_get_type(message, &type); | |
300 | if (r < 0) { | |
301 | log_warning_errno(r, "rtnl: Could not get message type: %m"); | |
302 | return 0; | |
303 | } else if (type != RTM_NEWLINK && type != RTM_DELLINK) { | |
304 | log_warning("rtnl: Received unexpected message type when processing link"); | |
305 | return 0; | |
306 | } | |
307 | ||
308 | r = sd_rtnl_message_link_get_ifindex(message, &ifindex); | |
309 | if (r < 0) { | |
310 | log_warning_errno(r, "rtnl: Could not get ifindex from link: %m"); | |
311 | return 0; | |
312 | } else if (ifindex <= 0) { | |
313 | log_warning("rtnl: received link message with invalid ifindex: %d", ifindex); | |
314 | return 0; | |
315 | } else | |
316 | link_get(m, ifindex, &link); | |
317 | ||
318 | r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name); | |
319 | if (r < 0) { | |
320 | log_warning_errno(r, "rtnl: Received link message without ifname: %m"); | |
321 | return 0; | |
322 | } else | |
323 | netdev_get(m, name, &netdev); | |
324 | ||
325 | switch (type) { | |
326 | case RTM_NEWLINK: | |
327 | if (!link) { | |
328 | /* link is new, so add it */ | |
329 | r = link_add(m, message, &link); | |
330 | if (r < 0) { | |
331 | log_warning_errno(r, "Could not add new link: %m"); | |
332 | return 0; | |
333 | } | |
334 | } | |
335 | ||
336 | if (netdev) { | |
337 | /* netdev exists, so make sure the ifindex matches */ | |
338 | r = netdev_set_ifindex(netdev, message); | |
339 | if (r < 0) { | |
340 | log_warning_errno(r, "Could not set ifindex on netdev: %m"); | |
341 | return 0; | |
342 | } | |
343 | } | |
344 | ||
345 | r = link_update(link, message); | |
346 | if (r < 0) | |
347 | return 0; | |
348 | ||
349 | break; | |
350 | ||
351 | case RTM_DELLINK: | |
352 | link_drop(link); | |
353 | netdev_drop(netdev); | |
354 | ||
355 | break; | |
356 | ||
357 | default: | |
358 | assert_not_reached("Received invalid RTNL message type."); | |
359 | } | |
360 | ||
361 | return 1; | |
362 | } | |
363 | ||
364 | static int systemd_netlink_fd(void) { | |
365 | int n, fd, rtnl_fd = -EINVAL; | |
366 | ||
367 | n = sd_listen_fds(true); | |
368 | if (n <= 0) | |
369 | return -EINVAL; | |
370 | ||
371 | for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd ++) { | |
372 | if (sd_is_socket(fd, AF_NETLINK, SOCK_RAW, -1) > 0) { | |
373 | if (rtnl_fd >= 0) | |
374 | return -EINVAL; | |
375 | ||
376 | rtnl_fd = fd; | |
377 | } | |
378 | } | |
379 | ||
380 | return rtnl_fd; | |
381 | } | |
382 | ||
383 | static int manager_connect_rtnl(Manager *m) { | |
384 | int fd, r; | |
385 | ||
386 | assert(m); | |
387 | ||
388 | fd = systemd_netlink_fd(); | |
389 | if (fd < 0) | |
390 | r = sd_netlink_open(&m->rtnl); | |
391 | else | |
392 | r = sd_netlink_open_fd(&m->rtnl, fd); | |
393 | if (r < 0) | |
394 | return r; | |
395 | ||
396 | r = sd_netlink_inc_rcvbuf(m->rtnl, RCVBUF_SIZE); | |
397 | if (r < 0) | |
398 | return r; | |
399 | ||
400 | r = sd_netlink_attach_event(m->rtnl, m->event, 0); | |
401 | if (r < 0) | |
402 | return r; | |
403 | ||
404 | r = sd_netlink_add_match(m->rtnl, RTM_NEWLINK, &manager_rtnl_process_link, m); | |
405 | if (r < 0) | |
406 | return r; | |
407 | ||
408 | r = sd_netlink_add_match(m->rtnl, RTM_DELLINK, &manager_rtnl_process_link, m); | |
409 | if (r < 0) | |
410 | return r; | |
411 | ||
412 | r = sd_netlink_add_match(m->rtnl, RTM_NEWADDR, &link_rtnl_process_address, m); | |
413 | if (r < 0) | |
414 | return r; | |
415 | ||
416 | r = sd_netlink_add_match(m->rtnl, RTM_DELADDR, &link_rtnl_process_address, m); | |
417 | if (r < 0) | |
418 | return r; | |
419 | ||
420 | return 0; | |
421 | } | |
422 | ||
423 | int manager_new(Manager **ret) { | |
424 | _cleanup_manager_free_ Manager *m = NULL; | |
425 | int r; | |
426 | ||
427 | m = new0(Manager, 1); | |
428 | if (!m) | |
429 | return -ENOMEM; | |
430 | ||
431 | m->state_file = strdup("/run/systemd/netif/state"); | |
432 | if (!m->state_file) | |
433 | return -ENOMEM; | |
434 | ||
435 | r = sd_event_default(&m->event); | |
436 | if (r < 0) | |
437 | return r; | |
438 | ||
439 | sd_event_set_watchdog(m->event, true); | |
440 | ||
441 | sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL); | |
442 | sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL); | |
443 | ||
444 | r = manager_connect_rtnl(m); | |
445 | if (r < 0) | |
446 | return r; | |
447 | ||
448 | r = manager_connect_udev(m); | |
449 | if (r < 0) | |
450 | return r; | |
451 | ||
452 | m->netdevs = hashmap_new(&string_hash_ops); | |
453 | if (!m->netdevs) | |
454 | return -ENOMEM; | |
455 | ||
456 | LIST_HEAD_INIT(m->networks); | |
457 | ||
458 | r = setup_default_address_pool(m); | |
459 | if (r < 0) | |
460 | return r; | |
461 | ||
462 | *ret = m; | |
463 | m = NULL; | |
464 | ||
465 | return 0; | |
466 | } | |
467 | ||
468 | void manager_free(Manager *m) { | |
469 | Network *network; | |
470 | NetDev *netdev; | |
471 | Link *link; | |
472 | AddressPool *pool; | |
473 | ||
474 | if (!m) | |
475 | return; | |
476 | ||
477 | free(m->state_file); | |
478 | ||
479 | udev_monitor_unref(m->udev_monitor); | |
480 | udev_unref(m->udev); | |
481 | sd_bus_unref(m->bus); | |
482 | sd_bus_slot_unref(m->prepare_for_sleep_slot); | |
483 | sd_event_source_unref(m->udev_event_source); | |
484 | sd_event_source_unref(m->bus_retry_event_source); | |
485 | sd_event_unref(m->event); | |
486 | ||
487 | while ((link = hashmap_first(m->links))) | |
488 | link_unref(link); | |
489 | hashmap_free(m->links); | |
490 | ||
491 | while ((network = m->networks)) | |
492 | network_free(network); | |
493 | ||
494 | hashmap_free(m->networks_by_name); | |
495 | ||
496 | while ((netdev = hashmap_first(m->netdevs))) | |
497 | netdev_unref(netdev); | |
498 | hashmap_free(m->netdevs); | |
499 | ||
500 | while ((pool = m->address_pools)) | |
501 | address_pool_free(pool); | |
502 | ||
503 | sd_netlink_unref(m->rtnl); | |
504 | ||
505 | free(m); | |
506 | } | |
507 | ||
508 | static bool manager_check_idle(void *userdata) { | |
509 | Manager *m = userdata; | |
510 | Link *link; | |
511 | Iterator i; | |
512 | ||
513 | assert(m); | |
514 | ||
515 | HASHMAP_FOREACH(link, m->links, i) { | |
516 | /* we are not woken on udev activity, so let's just wait for the | |
517 | * pending udev event */ | |
518 | if (link->state == LINK_STATE_PENDING) | |
519 | return false; | |
520 | ||
521 | if (!link->network) | |
522 | continue; | |
523 | ||
524 | /* we are not woken on netork activity, so let's stay around */ | |
525 | if (link_lldp_enabled(link) || | |
526 | link_ipv4ll_enabled(link) || | |
527 | link_dhcp4_server_enabled(link) || | |
528 | link_dhcp4_enabled(link) || | |
529 | link_dhcp6_enabled(link)) | |
530 | return false; | |
531 | } | |
532 | ||
533 | return true; | |
534 | } | |
535 | ||
536 | int manager_run(Manager *m) { | |
537 | assert(m); | |
538 | ||
539 | if (m->bus) | |
540 | return bus_event_loop_with_idle( | |
541 | m->event, | |
542 | m->bus, | |
543 | "org.freedesktop.network1", | |
544 | DEFAULT_EXIT_USEC, | |
545 | manager_check_idle, | |
546 | m); | |
547 | else | |
548 | /* failed to connect to the bus, so we lose exit-on-idle logic, | |
549 | this should not happen except if dbus is not around at all */ | |
550 | return sd_event_loop(m->event); | |
551 | } | |
552 | ||
553 | int manager_load_config(Manager *m) { | |
554 | int r; | |
555 | ||
556 | /* update timestamp */ | |
557 | paths_check_timestamp(network_dirs, &m->network_dirs_ts_usec, true); | |
558 | ||
559 | r = netdev_load(m); | |
560 | if (r < 0) | |
561 | return r; | |
562 | ||
563 | r = network_load(m); | |
564 | if (r < 0) | |
565 | return r; | |
566 | ||
567 | return 0; | |
568 | } | |
569 | ||
570 | bool manager_should_reload(Manager *m) { | |
571 | return paths_check_timestamp(network_dirs, &m->network_dirs_ts_usec, false); | |
572 | } | |
573 | ||
574 | int manager_rtnl_enumerate_links(Manager *m) { | |
575 | _cleanup_netlink_message_unref_ sd_netlink_message *req = NULL, *reply = NULL; | |
576 | sd_netlink_message *link; | |
577 | int r; | |
578 | ||
579 | assert(m); | |
580 | assert(m->rtnl); | |
581 | ||
582 | r = sd_rtnl_message_new_link(m->rtnl, &req, RTM_GETLINK, 0); | |
583 | if (r < 0) | |
584 | return r; | |
585 | ||
586 | r = sd_netlink_message_request_dump(req, true); | |
587 | if (r < 0) | |
588 | return r; | |
589 | ||
590 | r = sd_netlink_call(m->rtnl, req, 0, &reply); | |
591 | if (r < 0) | |
592 | return r; | |
593 | ||
594 | for (link = reply; link; link = sd_netlink_message_next(link)) { | |
595 | int k; | |
596 | ||
597 | m->enumerating = true; | |
598 | ||
599 | k = manager_rtnl_process_link(m->rtnl, link, m); | |
600 | if (k < 0) | |
601 | r = k; | |
602 | ||
603 | m->enumerating = false; | |
604 | } | |
605 | ||
606 | return r; | |
607 | } | |
608 | ||
609 | int manager_rtnl_enumerate_addresses(Manager *m) { | |
610 | _cleanup_netlink_message_unref_ sd_netlink_message *req = NULL, *reply = NULL; | |
611 | sd_netlink_message *addr; | |
612 | int r; | |
613 | ||
614 | assert(m); | |
615 | assert(m->rtnl); | |
616 | ||
617 | r = sd_rtnl_message_new_addr(m->rtnl, &req, RTM_GETADDR, 0, 0); | |
618 | if (r < 0) | |
619 | return r; | |
620 | ||
621 | r = sd_netlink_message_request_dump(req, true); | |
622 | if (r < 0) | |
623 | return r; | |
624 | ||
625 | r = sd_netlink_call(m->rtnl, req, 0, &reply); | |
626 | if (r < 0) | |
627 | return r; | |
628 | ||
629 | for (addr = reply; addr; addr = sd_netlink_message_next(addr)) { | |
630 | int k; | |
631 | ||
632 | m->enumerating = true; | |
633 | ||
634 | k = link_rtnl_process_address(m->rtnl, addr, m); | |
635 | if (k < 0) | |
636 | r = k; | |
637 | ||
638 | m->enumerating = false; | |
639 | } | |
640 | ||
641 | return r; | |
642 | } | |
643 | ||
644 | static int set_put_in_addr(Set *s, const struct in_addr *address) { | |
645 | char *p; | |
646 | int r; | |
647 | ||
648 | assert(s); | |
649 | ||
650 | r = in_addr_to_string(AF_INET, (const union in_addr_union*) address, &p); | |
651 | if (r < 0) | |
652 | return r; | |
653 | ||
654 | r = set_consume(s, p); | |
655 | if (r == -EEXIST) | |
656 | return 0; | |
657 | ||
658 | return r; | |
659 | } | |
660 | ||
661 | static int set_put_in_addrv(Set *s, const struct in_addr *addresses, int n) { | |
662 | int r, i, c = 0; | |
663 | ||
664 | assert(s); | |
665 | assert(n <= 0 || addresses); | |
666 | ||
667 | for (i = 0; i < n; i++) { | |
668 | r = set_put_in_addr(s, addresses+i); | |
669 | if (r < 0) | |
670 | return r; | |
671 | ||
672 | c += r; | |
673 | } | |
674 | ||
675 | return c; | |
676 | } | |
677 | ||
678 | static void print_string_set(FILE *f, const char *field, Set *s) { | |
679 | bool space = false; | |
680 | Iterator i; | |
681 | char *p; | |
682 | ||
683 | if (set_isempty(s)) | |
684 | return; | |
685 | ||
686 | fputs(field, f); | |
687 | ||
688 | SET_FOREACH(p, s, i) { | |
689 | if (space) | |
690 | fputc(' ', f); | |
691 | fputs(p, f); | |
692 | space = true; | |
693 | } | |
694 | fputc('\n', f); | |
695 | } | |
696 | ||
697 | int manager_save(Manager *m) { | |
698 | _cleanup_set_free_free_ Set *dns = NULL, *ntp = NULL, *domains = NULL; | |
699 | Link *link; | |
700 | Iterator i; | |
701 | _cleanup_free_ char *temp_path = NULL; | |
702 | _cleanup_fclose_ FILE *f = NULL; | |
703 | LinkOperationalState operstate = LINK_OPERSTATE_OFF; | |
704 | const char *operstate_str; | |
705 | int r; | |
706 | ||
707 | assert(m); | |
708 | assert(m->state_file); | |
709 | ||
710 | /* We add all NTP and DNS server to a set, to filter out duplicates */ | |
711 | dns = set_new(&string_hash_ops); | |
712 | if (!dns) | |
713 | return -ENOMEM; | |
714 | ||
715 | ntp = set_new(&string_hash_ops); | |
716 | if (!ntp) | |
717 | return -ENOMEM; | |
718 | ||
719 | domains = set_new(&string_hash_ops); | |
720 | if (!domains) | |
721 | return -ENOMEM; | |
722 | ||
723 | HASHMAP_FOREACH(link, m->links, i) { | |
724 | if (link->flags & IFF_LOOPBACK) | |
725 | continue; | |
726 | ||
727 | if (link->operstate > operstate) | |
728 | operstate = link->operstate; | |
729 | ||
730 | if (!link->network) | |
731 | continue; | |
732 | ||
733 | /* First add the static configured entries */ | |
734 | r = set_put_strdupv(dns, link->network->dns); | |
735 | if (r < 0) | |
736 | return r; | |
737 | ||
738 | r = set_put_strdupv(ntp, link->network->ntp); | |
739 | if (r < 0) | |
740 | return r; | |
741 | ||
742 | r = set_put_strdupv(domains, link->network->domains); | |
743 | if (r < 0) | |
744 | return r; | |
745 | ||
746 | if (!link->dhcp_lease) | |
747 | continue; | |
748 | ||
749 | /* Secondly, add the entries acquired via DHCP */ | |
750 | if (link->network->dhcp_dns) { | |
751 | const struct in_addr *addresses; | |
752 | ||
753 | r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses); | |
754 | if (r > 0) { | |
755 | r = set_put_in_addrv(dns, addresses, r); | |
756 | if (r < 0) | |
757 | return r; | |
758 | } else if (r < 0 && r != -ENOENT) | |
759 | return r; | |
760 | } | |
761 | ||
762 | if (link->network->dhcp_ntp) { | |
763 | const struct in_addr *addresses; | |
764 | ||
765 | r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses); | |
766 | if (r > 0) { | |
767 | r = set_put_in_addrv(ntp, addresses, r); | |
768 | if (r < 0) | |
769 | return r; | |
770 | } else if (r < 0 && r != -ENOENT) | |
771 | return r; | |
772 | } | |
773 | ||
774 | if (link->network->dhcp_domains) { | |
775 | const char *domainname; | |
776 | ||
777 | r = sd_dhcp_lease_get_domainname(link->dhcp_lease, &domainname); | |
778 | if (r >= 0) { | |
779 | r = set_put_strdup(domains, domainname); | |
780 | if (r < 0) | |
781 | return r; | |
782 | } else if (r != -ENOENT) | |
783 | return r; | |
784 | } | |
785 | } | |
786 | ||
787 | operstate_str = link_operstate_to_string(operstate); | |
788 | assert(operstate_str); | |
789 | ||
790 | r = fopen_temporary(m->state_file, &f, &temp_path); | |
791 | if (r < 0) | |
792 | return r; | |
793 | ||
794 | fchmod(fileno(f), 0644); | |
795 | ||
796 | fprintf(f, | |
797 | "# This is private data. Do not parse.\n" | |
798 | "OPER_STATE=%s\n", operstate_str); | |
799 | ||
800 | print_string_set(f, "DNS=", dns); | |
801 | print_string_set(f, "NTP=", ntp); | |
802 | print_string_set(f, "DOMAINS=", domains); | |
803 | ||
804 | r = fflush_and_check(f); | |
805 | if (r < 0) | |
806 | goto fail; | |
807 | ||
808 | if (rename(temp_path, m->state_file) < 0) { | |
809 | r = -errno; | |
810 | goto fail; | |
811 | } | |
812 | ||
813 | if (m->operational_state != operstate) { | |
814 | m->operational_state = operstate; | |
815 | r = manager_send_changed(m, "OperationalState", NULL); | |
816 | if (r < 0) | |
817 | log_error_errno(r, "Could not emit changed OperationalState: %m"); | |
818 | } | |
819 | ||
820 | return 0; | |
821 | ||
822 | fail: | |
823 | (void) unlink(m->state_file); | |
824 | (void) unlink(temp_path); | |
825 | ||
826 | return log_error_errno(r, "Failed to save network state to %s: %m", m->state_file); | |
827 | } | |
828 | ||
829 | int manager_address_pool_acquire(Manager *m, int family, unsigned prefixlen, union in_addr_union *found) { | |
830 | AddressPool *p; | |
831 | int r; | |
832 | ||
833 | assert(m); | |
834 | assert(prefixlen > 0); | |
835 | assert(found); | |
836 | ||
837 | LIST_FOREACH(address_pools, p, m->address_pools) { | |
838 | if (p->family != family) | |
839 | continue; | |
840 | ||
841 | r = address_pool_acquire(p, prefixlen, found); | |
842 | if (r != 0) | |
843 | return r; | |
844 | } | |
845 | ||
846 | return 0; | |
847 | } |