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f579559b TG |
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 | ||
25 | #include "networkd.h" | |
26 | #include "libudev-private.h" | |
27 | #include "util.h" | |
28 | ||
29 | int link_new(Manager *manager, struct udev_device *device, Link **ret) { | |
30 | _cleanup_link_free_ Link *link = NULL; | |
8cd11a0f | 31 | const char *mac; |
602cc437 | 32 | struct ether_addr *mac_addr; |
c166a070 | 33 | const char *ifname; |
f579559b TG |
34 | int r; |
35 | ||
36 | assert(device); | |
37 | assert(ret); | |
38 | ||
39 | link = new0(Link, 1); | |
40 | if (!link) | |
41 | return -ENOMEM; | |
42 | ||
5a3eb5a7 TG |
43 | link->manager = manager; |
44 | link->state = _LINK_STATE_INVALID; | |
45 | ||
0617ffab TG |
46 | link->ifindex = udev_device_get_ifindex(device); |
47 | if (link->ifindex <= 0) | |
f579559b TG |
48 | return -EINVAL; |
49 | ||
8cd11a0f | 50 | mac = udev_device_get_sysattr_value(device, "address"); |
5a3eb5a7 TG |
51 | if (mac) { |
52 | mac_addr = ether_aton(mac); | |
53 | if (mac_addr) | |
54 | memcpy(&link->mac, mac_addr, sizeof(struct ether_addr)); | |
55 | } | |
f579559b | 56 | |
c166a070 TG |
57 | ifname = udev_device_get_sysname(device); |
58 | link->ifname = strdup(ifname); | |
59 | ||
0617ffab | 60 | r = hashmap_put(manager->links, &link->ifindex, link); |
f579559b TG |
61 | if (r < 0) |
62 | return r; | |
63 | ||
64 | *ret = link; | |
65 | link = NULL; | |
66 | ||
67 | return 0; | |
68 | } | |
69 | ||
70 | void link_free(Link *link) { | |
71 | if (!link) | |
72 | return; | |
73 | ||
0617ffab | 74 | assert(link->manager); |
f579559b | 75 | |
f5be5601 TG |
76 | if (link->dhcp) |
77 | sd_dhcp_client_free(link->dhcp); | |
78 | ||
79 | route_free(link->dhcp_route); | |
80 | link->dhcp_route = NULL; | |
81 | ||
82 | address_free(link->dhcp_address); | |
83 | link->dhcp_address = NULL; | |
84 | ||
0617ffab | 85 | hashmap_remove(link->manager->links, &link->ifindex); |
f579559b | 86 | |
c166a070 TG |
87 | free(link->ifname); |
88 | ||
f579559b TG |
89 | free(link); |
90 | } | |
91 | ||
92 | int link_add(Manager *m, struct udev_device *device) { | |
93 | Link *link; | |
94 | Network *network; | |
95 | int r; | |
96 | uint64_t ifindex; | |
02b59d57 | 97 | const char *devtype; |
f579559b TG |
98 | |
99 | assert(m); | |
100 | assert(device); | |
101 | ||
102 | ifindex = udev_device_get_ifindex(device); | |
103 | link = hashmap_get(m->links, &ifindex); | |
104 | if (link) | |
105 | return 0; | |
106 | ||
107 | r = link_new(m, device, &link); | |
108 | if (r < 0) { | |
c166a070 | 109 | log_error("Could not create link: %s", strerror(-r)); |
f579559b TG |
110 | return r; |
111 | } | |
112 | ||
02b59d57 TG |
113 | devtype = udev_device_get_devtype(device); |
114 | if (streq_ptr(devtype, "bridge")) { | |
115 | r = bridge_set_link(m, link); | |
116 | if (r < 0) | |
117 | return r == -ENOENT ? 0 : r; | |
118 | } | |
119 | ||
f579559b TG |
120 | r = network_get(m, device, &network); |
121 | if (r < 0) | |
122 | return r == -ENOENT ? 0 : r; | |
123 | ||
124 | r = network_apply(m, network, link); | |
125 | if (r < 0) | |
126 | return r; | |
127 | ||
128 | return 0; | |
129 | } | |
130 | ||
f882c247 | 131 | static int link_enter_configured(Link *link) { |
ef1ba606 TG |
132 | assert(link); |
133 | assert(link->state == LINK_STATE_SETTING_ROUTES); | |
134 | ||
c166a070 | 135 | log_info("Link '%s' configured", link->ifname); |
f882c247 TG |
136 | |
137 | link->state = LINK_STATE_CONFIGURED; | |
138 | ||
139 | return 0; | |
140 | } | |
141 | ||
ef1ba606 TG |
142 | static void link_enter_failed(Link *link) { |
143 | assert(link); | |
f882c247 | 144 | |
ef1ba606 | 145 | link->state = LINK_STATE_FAILED; |
f882c247 TG |
146 | } |
147 | ||
f882c247 TG |
148 | static int route_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
149 | Link *link = userdata; | |
150 | int r; | |
151 | ||
f5be5601 TG |
152 | assert(link->route_messages > 0); |
153 | assert(link->state == LINK_STATE_SETTING_ADDRESSES || | |
154 | link->state == LINK_STATE_SETTING_ROUTES || | |
155 | link->state == LINK_STATE_FAILED); | |
f882c247 | 156 | |
f5be5601 | 157 | link->route_messages --; |
f882c247 TG |
158 | |
159 | if (link->state == LINK_STATE_FAILED) | |
160 | return 1; | |
161 | ||
162 | r = sd_rtnl_message_get_errno(m); | |
c166a070 TG |
163 | if (r < 0 && r != -EEXIST) |
164 | log_warning("Could not set route on interface '%s': %s", | |
165 | link->ifname, strerror(-r)); | |
f882c247 | 166 | |
f5be5601 TG |
167 | /* we might have received an old reply after moving back to SETTING_ADDRESSES, |
168 | * ignore it */ | |
169 | if (link->route_messages == 0 && link->state == LINK_STATE_SETTING_ROUTES) { | |
dd3efc09 TG |
170 | log_info("Routes set for link '%s'", link->ifname); |
171 | link_enter_configured(link); | |
172 | } | |
f882c247 TG |
173 | |
174 | return 1; | |
175 | } | |
176 | ||
177 | static int link_enter_set_routes(Link *link) { | |
178 | Route *route; | |
179 | int r; | |
180 | ||
181 | assert(link); | |
182 | assert(link->network); | |
ef1ba606 | 183 | assert(link->state == LINK_STATE_SETTING_ADDRESSES); |
f882c247 | 184 | |
ef1ba606 | 185 | link->state = LINK_STATE_SETTING_ROUTES; |
f882c247 | 186 | |
f5be5601 | 187 | if (!link->network->static_routes && !link->dhcp_route) |
dd3efc09 | 188 | return link_enter_configured(link); |
f882c247 | 189 | |
f048a16b | 190 | LIST_FOREACH(static_routes, route, link->network->static_routes) { |
f882c247 | 191 | r = route_configure(route, link, &route_handler); |
dd3efc09 TG |
192 | if (r < 0) { |
193 | log_warning("Could not set routes for link '%s'", link->ifname); | |
ef1ba606 TG |
194 | link_enter_failed(link); |
195 | return r; | |
dd3efc09 | 196 | } |
c166a070 | 197 | |
f5be5601 TG |
198 | link->route_messages ++; |
199 | } | |
200 | ||
201 | if (link->dhcp_route) { | |
202 | r = route_configure(link->dhcp_route, link, &route_handler); | |
203 | if (r < 0) { | |
204 | log_warning("Could not set routes for link '%s'", link->ifname); | |
205 | link_enter_failed(link); | |
206 | return r; | |
207 | } | |
208 | ||
209 | link->route_messages ++; | |
f882c247 TG |
210 | } |
211 | ||
212 | return 0; | |
213 | } | |
214 | ||
f882c247 TG |
215 | static int address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
216 | Link *link = userdata; | |
217 | int r; | |
218 | ||
f5be5601 TG |
219 | assert(m); |
220 | assert(link); | |
221 | assert(link->ifname); | |
222 | assert(link->addr_messages > 0); | |
ef1ba606 | 223 | assert(link->state == LINK_STATE_SETTING_ADDRESSES || link->state == LINK_STATE_FAILED); |
f882c247 | 224 | |
f5be5601 | 225 | link->addr_messages --; |
f882c247 TG |
226 | |
227 | if (link->state == LINK_STATE_FAILED) | |
228 | return 1; | |
229 | ||
230 | r = sd_rtnl_message_get_errno(m); | |
c166a070 TG |
231 | if (r < 0 && r != -EEXIST) |
232 | log_warning("Could not set address on interface '%s': %s", | |
233 | link->ifname, strerror(-r)); | |
f882c247 | 234 | |
f5be5601 | 235 | if (link->addr_messages == 0) { |
dd3efc09 | 236 | log_info("Addresses set for link '%s'", link->ifname); |
ef1ba606 | 237 | link_enter_set_routes(link); |
dd3efc09 | 238 | } |
f882c247 TG |
239 | |
240 | return 1; | |
241 | } | |
242 | ||
243 | static int link_enter_set_addresses(Link *link) { | |
244 | Address *address; | |
245 | int r; | |
246 | ||
247 | assert(link); | |
248 | assert(link->network); | |
f5be5601 | 249 | assert(link->state != _LINK_STATE_INVALID); |
f882c247 | 250 | |
ef1ba606 | 251 | link->state = LINK_STATE_SETTING_ADDRESSES; |
f882c247 | 252 | |
f5be5601 | 253 | if (!link->network->static_addresses && !link->dhcp_address) |
ef1ba606 | 254 | return link_enter_set_routes(link); |
f882c247 | 255 | |
f048a16b | 256 | LIST_FOREACH(static_addresses, address, link->network->static_addresses) { |
f882c247 | 257 | r = address_configure(address, link, &address_handler); |
dd3efc09 TG |
258 | if (r < 0) { |
259 | log_warning("Could not set addresses for link '%s'", link->ifname); | |
ef1ba606 TG |
260 | link_enter_failed(link); |
261 | return r; | |
dd3efc09 | 262 | } |
c166a070 | 263 | |
f5be5601 TG |
264 | link->addr_messages ++; |
265 | } | |
266 | ||
267 | if (link->dhcp_address) { | |
268 | r = address_configure(link->dhcp_address, link, &address_handler); | |
269 | if (r < 0) { | |
270 | log_warning("Could not set addresses for link '%s'", link->ifname); | |
271 | link_enter_failed(link); | |
272 | return r; | |
273 | } | |
274 | ||
275 | link->addr_messages ++; | |
f882c247 TG |
276 | } |
277 | ||
278 | return 0; | |
279 | } | |
280 | ||
dd3efc09 TG |
281 | static int link_up_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
282 | Link *link = userdata; | |
283 | int r; | |
284 | ||
285 | r = sd_rtnl_message_get_errno(m); | |
286 | if (r < 0) { | |
287 | log_warning("Could not bring up interface '%s': %s", | |
288 | link->ifname, strerror(-r)); | |
289 | link_enter_failed(link); | |
290 | } | |
f882c247 TG |
291 | |
292 | return 1; | |
293 | } | |
294 | ||
295 | static int link_up(Link *link) { | |
f579559b TG |
296 | _cleanup_sd_rtnl_message_unref_ sd_rtnl_message *req = NULL; |
297 | int r; | |
298 | ||
f882c247 TG |
299 | assert(link); |
300 | assert(link->manager); | |
301 | assert(link->manager->rtnl); | |
302 | ||
0f49a5f7 | 303 | r = sd_rtnl_message_link_new(RTM_SETLINK, link->ifindex, &req); |
f579559b | 304 | if (r < 0) { |
0f49a5f7 | 305 | log_error("Could not allocate RTM_SETLINK message"); |
f579559b TG |
306 | return r; |
307 | } | |
308 | ||
fc25d7f8 TG |
309 | r = sd_rtnl_message_link_set_flags(req, IFF_UP); |
310 | if (r < 0) { | |
311 | log_error("Could not set link flags"); | |
312 | return r; | |
313 | } | |
314 | ||
dd3efc09 | 315 | r = sd_rtnl_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL); |
f579559b | 316 | if (r < 0) { |
f882c247 | 317 | log_error("Could not send rtnetlink message: %s", strerror(-r)); |
f579559b TG |
318 | return r; |
319 | } | |
320 | ||
f882c247 TG |
321 | return 0; |
322 | } | |
323 | ||
ef1ba606 | 324 | static int link_bridge_joined(Link *link) { |
f882c247 TG |
325 | int r; |
326 | ||
ef1ba606 TG |
327 | assert(link); |
328 | assert(link->state == LINK_STATE_JOINING_BRIDGE); | |
f5be5601 | 329 | assert(link->network); |
dd3efc09 | 330 | |
f882c247 | 331 | r = link_up(link); |
ef1ba606 TG |
332 | if (r < 0) { |
333 | link_enter_failed(link); | |
334 | return r; | |
335 | } | |
f882c247 | 336 | |
f5be5601 TG |
337 | if (!link->network->dhcp) { |
338 | r = link_enter_set_addresses(link); | |
339 | if (r < 0) | |
340 | link_enter_failed(link); | |
341 | return r; | |
ef1ba606 TG |
342 | } |
343 | ||
344 | return 0; | |
02b59d57 TG |
345 | } |
346 | ||
347 | static int bridge_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { | |
348 | Link *link = userdata; | |
349 | int r; | |
350 | ||
ef1ba606 TG |
351 | assert(link->state == LINK_STATE_JOINING_BRIDGE || link->state == LINK_STATE_FAILED); |
352 | assert(link->network); | |
02b59d57 TG |
353 | |
354 | if (link->state == LINK_STATE_FAILED) | |
355 | return 1; | |
356 | ||
357 | r = sd_rtnl_message_get_errno(m); | |
ef1ba606 | 358 | if (r < 0) { |
dd3efc09 TG |
359 | log_warning("Could not join interface '%s' to bridge '%s': %s", |
360 | link->ifname, link->network->bridge->name, strerror(-r)); | |
ef1ba606 TG |
361 | link_enter_failed(link); |
362 | return 1; | |
363 | } else | |
dd3efc09 TG |
364 | log_info("Join interface '%s' to bridge: %s", |
365 | link->ifname, link->network->bridge->name); | |
02b59d57 | 366 | |
ef1ba606 | 367 | link_bridge_joined(link); |
02b59d57 TG |
368 | |
369 | return 1; | |
370 | } | |
371 | ||
372 | static int link_enter_join_bridge(Link *link) { | |
373 | int r; | |
374 | ||
375 | assert(link); | |
376 | assert(link->network); | |
ef1ba606 | 377 | assert(link->state == _LINK_STATE_INVALID); |
02b59d57 | 378 | |
ef1ba606 | 379 | link->state = LINK_STATE_JOINING_BRIDGE; |
02b59d57 | 380 | |
ef1ba606 TG |
381 | if (!link->network->bridge) |
382 | return link_bridge_joined(link); | |
02b59d57 TG |
383 | |
384 | r = bridge_join(link->network->bridge, link, &bridge_handler); | |
dd3efc09 TG |
385 | if (r < 0) { |
386 | log_warning("Could not join link '%s' to bridge '%s'", link->ifname, | |
387 | link->network->bridge->name); | |
ef1ba606 TG |
388 | link_enter_failed(link); |
389 | return r; | |
390 | } | |
391 | ||
392 | return 0; | |
393 | } | |
394 | ||
395 | static int link_get_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { | |
396 | Link *link = userdata; | |
397 | int r; | |
398 | ||
399 | r = sd_rtnl_message_get_errno(m); | |
400 | if (r < 0) { | |
401 | log_warning("Could not get state of interface '%s': %s", | |
402 | link->ifname, strerror(-r)); | |
403 | link_enter_failed(link); | |
404 | } | |
405 | ||
5eb036ca TG |
406 | link_update(link, m); |
407 | ||
ef1ba606 TG |
408 | return 1; |
409 | } | |
410 | ||
411 | static int link_get(Link *link) { | |
412 | _cleanup_sd_rtnl_message_unref_ sd_rtnl_message *req = NULL; | |
413 | int r; | |
414 | ||
415 | assert(link); | |
416 | assert(link->manager); | |
417 | assert(link->manager->rtnl); | |
418 | ||
419 | r = sd_rtnl_message_link_new(RTM_GETLINK, link->ifindex, &req); | |
420 | if (r < 0) { | |
421 | log_error("Could not allocate RTM_GETLINK message"); | |
422 | return r; | |
423 | } | |
424 | ||
425 | r = sd_rtnl_call_async(link->manager->rtnl, req, link_get_handler, link, 0, NULL); | |
426 | if (r < 0) { | |
427 | log_error("Could not send rtnetlink message: %s", strerror(-r)); | |
428 | return r; | |
dd3efc09 | 429 | } |
02b59d57 TG |
430 | |
431 | return 0; | |
432 | } | |
433 | ||
434 | int link_configure(Link *link) { | |
435 | int r; | |
436 | ||
ef1ba606 TG |
437 | assert(link); |
438 | assert(link->network); | |
439 | assert(link->state == _LINK_STATE_INVALID); | |
440 | ||
dd3efc09 | 441 | r = link_get(link); |
ef1ba606 TG |
442 | if (r < 0) { |
443 | link_enter_failed(link); | |
444 | return r; | |
445 | } | |
dd3efc09 | 446 | |
02b59d57 | 447 | r = link_enter_join_bridge(link); |
f882c247 | 448 | if (r < 0) |
ef1ba606 | 449 | return r; |
f579559b TG |
450 | |
451 | return 0; | |
452 | } | |
dd3efc09 | 453 | |
f5be5601 TG |
454 | static int address_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
455 | Link *link = userdata; | |
456 | int r; | |
457 | ||
458 | assert(m); | |
459 | assert(link); | |
460 | assert(link->ifname); | |
461 | ||
462 | if (link->state == LINK_STATE_FAILED) | |
463 | return 1; | |
464 | ||
465 | r = sd_rtnl_message_get_errno(m); | |
466 | if (r < 0 && r != -EEXIST) | |
467 | log_warning("Could not drop address from interface '%s': %s", | |
468 | link->ifname, strerror(-r)); | |
469 | ||
470 | return 1; | |
471 | } | |
472 | ||
473 | static void dhcp_handler(sd_dhcp_client *client, int event, void *userdata) { | |
474 | Link *link = userdata; | |
475 | struct in_addr address; | |
476 | struct in_addr netmask; | |
477 | struct in_addr gateway; | |
478 | int prefixlen; | |
479 | int r; | |
480 | ||
481 | if (link->state == LINK_STATE_FAILED) | |
482 | return; | |
483 | ||
484 | if (event < 0) { | |
485 | log_warning("DHCP error: %s", strerror(-event)); | |
486 | link_enter_failed(link); | |
487 | return; | |
488 | } | |
489 | ||
490 | if (event == DHCP_EVENT_NO_LEASE) | |
491 | log_info("IP address in use."); | |
492 | ||
493 | if (event == DHCP_EVENT_IP_CHANGE || event == DHCP_EVENT_EXPIRED || | |
494 | event == DHCP_EVENT_STOP) { | |
495 | address_drop(link->dhcp_address, link, address_drop_handler); | |
496 | ||
497 | address_free(link->dhcp_address); | |
498 | link->dhcp_address = NULL; | |
499 | ||
500 | route_free(link->dhcp_route); | |
501 | link->dhcp_route = NULL; | |
502 | } | |
503 | ||
504 | r = sd_dhcp_client_get_address(client, &address); | |
505 | if (r < 0) { | |
506 | log_warning("DHCP error: no address"); | |
507 | link_enter_failed(link); | |
508 | return; | |
509 | } | |
510 | ||
511 | r = sd_dhcp_client_get_netmask(client, &netmask); | |
512 | if (r < 0) { | |
513 | log_warning("DHCP error: no netmask"); | |
514 | link_enter_failed(link); | |
515 | return; | |
516 | } | |
517 | ||
518 | prefixlen = sd_dhcp_client_prefixlen(&netmask); | |
519 | if (prefixlen < 0) { | |
520 | log_warning("DHCP error: no prefixlen"); | |
521 | link_enter_failed(link); | |
522 | return; | |
523 | } | |
524 | ||
525 | r = sd_dhcp_client_get_router(client, &gateway); | |
526 | if (r < 0) { | |
527 | log_warning("DHCP error: no router"); | |
528 | link_enter_failed(link); | |
529 | return; | |
530 | } | |
531 | ||
532 | if (event == DHCP_EVENT_IP_CHANGE || event == DHCP_EVENT_IP_ACQUIRE) { | |
533 | _cleanup_address_free_ Address *addr = NULL; | |
534 | _cleanup_route_free_ Route *rt = NULL; | |
535 | ||
536 | log_info("Received config over DHCPv4"); | |
537 | ||
538 | r = address_new_dynamic(&addr); | |
539 | if (r < 0) { | |
540 | log_error("Could not allocate address"); | |
541 | link_enter_failed(link); | |
542 | return; | |
543 | } | |
544 | ||
545 | addr->family = AF_INET; | |
546 | addr->in_addr.in = address; | |
547 | addr->prefixlen = prefixlen; | |
548 | addr->netmask = netmask; | |
549 | ||
550 | r = route_new_dynamic(&rt); | |
551 | if (r < 0) { | |
552 | log_error("Could not allocate route"); | |
553 | link_enter_failed(link); | |
554 | return; | |
555 | } | |
556 | ||
557 | rt->family = AF_INET; | |
558 | rt->in_addr.in = gateway; | |
559 | ||
560 | link->dhcp_address = addr; | |
561 | link->dhcp_route = rt; | |
562 | addr = NULL; | |
563 | rt = NULL; | |
564 | ||
565 | link_enter_set_addresses(link); | |
566 | } | |
567 | ||
568 | return; | |
569 | } | |
570 | ||
571 | static int link_acquire_conf(Link *link) { | |
572 | int r; | |
573 | ||
574 | assert(link); | |
575 | assert(link->network); | |
576 | assert(link->network->dhcp); | |
577 | assert(link->manager); | |
578 | assert(link->manager->event); | |
579 | ||
580 | if (!link->dhcp) { | |
581 | link->dhcp = sd_dhcp_client_new(link->manager->event); | |
582 | if (!link->dhcp) | |
583 | return -ENOMEM; | |
584 | ||
585 | r = sd_dhcp_client_set_index(link->dhcp, link->ifindex); | |
586 | if (r < 0) | |
587 | return r; | |
588 | ||
589 | r = sd_dhcp_client_set_mac(link->dhcp, &link->mac); | |
590 | if (r < 0) | |
591 | return r; | |
592 | ||
593 | r = sd_dhcp_client_set_callback(link->dhcp, dhcp_handler, link); | |
594 | if (r < 0) | |
595 | return r; | |
596 | } | |
597 | ||
598 | r = sd_dhcp_client_start(link->dhcp); | |
599 | if (r < 0) | |
600 | return r; | |
601 | ||
602 | return 0; | |
603 | } | |
604 | ||
22936833 TG |
605 | int link_update(Link *link, sd_rtnl_message *m) { |
606 | unsigned flags; | |
607 | int r; | |
608 | ||
dd3efc09 | 609 | assert(link); |
22936833 TG |
610 | assert(m); |
611 | ||
612 | r = sd_rtnl_message_link_get_flags(m, &flags); | |
613 | if (r < 0) { | |
614 | log_warning("Could not get link flags of '%s'", link->ifname); | |
615 | return r; | |
616 | } | |
dd3efc09 TG |
617 | |
618 | if (link->flags & IFF_UP && !(flags & IFF_UP)) | |
619 | log_info("Interface '%s' is down", link->ifname); | |
620 | else if (!(link->flags & IFF_UP) && flags & IFF_UP) | |
621 | log_info("Interface '%s' is up", link->ifname); | |
622 | ||
f5be5601 | 623 | if (link->flags & IFF_LOWER_UP && !(flags & IFF_LOWER_UP)) { |
dd3efc09 | 624 | log_info("Interface '%s' is disconnected", link->ifname); |
f5be5601 TG |
625 | |
626 | if (link->network->dhcp) { | |
627 | r = sd_dhcp_client_stop(link->dhcp); | |
628 | if (r < 0) { | |
629 | link_enter_failed(link); | |
630 | return r; | |
631 | } | |
632 | } | |
633 | } else if (!(link->flags & IFF_LOWER_UP) && flags & IFF_LOWER_UP) { | |
dd3efc09 TG |
634 | log_info("Interface '%s' is connected", link->ifname); |
635 | ||
be9326ca | 636 | if (link->network && link->network->dhcp) { |
f5be5601 TG |
637 | r = link_acquire_conf(link); |
638 | if (r < 0) { | |
639 | link_enter_failed(link); | |
640 | return r; | |
641 | } | |
642 | } | |
643 | } | |
644 | ||
dd3efc09 TG |
645 | link->flags = flags; |
646 | ||
647 | return 0; | |
648 | } |