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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 | ||
449f7554 | 135 | log_info("%s: link 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 | |
449f7554 TG |
145 | log_warning("%s: failed", link->ifname); |
146 | ||
ef1ba606 | 147 | link->state = LINK_STATE_FAILED; |
f882c247 TG |
148 | } |
149 | ||
f882c247 TG |
150 | static int route_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
151 | Link *link = userdata; | |
152 | int r; | |
153 | ||
f5be5601 TG |
154 | assert(link->route_messages > 0); |
155 | assert(link->state == LINK_STATE_SETTING_ADDRESSES || | |
156 | link->state == LINK_STATE_SETTING_ROUTES || | |
157 | link->state == LINK_STATE_FAILED); | |
f882c247 | 158 | |
f5be5601 | 159 | link->route_messages --; |
f882c247 TG |
160 | |
161 | if (link->state == LINK_STATE_FAILED) | |
162 | return 1; | |
163 | ||
164 | r = sd_rtnl_message_get_errno(m); | |
c166a070 | 165 | if (r < 0 && r != -EEXIST) |
449f7554 | 166 | log_warning("%s: could not set route: %s", |
c166a070 | 167 | link->ifname, strerror(-r)); |
f882c247 | 168 | |
f5be5601 TG |
169 | /* we might have received an old reply after moving back to SETTING_ADDRESSES, |
170 | * ignore it */ | |
171 | if (link->route_messages == 0 && link->state == LINK_STATE_SETTING_ROUTES) { | |
449f7554 | 172 | log_debug("%s: routes set", link->ifname); |
dd3efc09 TG |
173 | link_enter_configured(link); |
174 | } | |
f882c247 TG |
175 | |
176 | return 1; | |
177 | } | |
178 | ||
179 | static int link_enter_set_routes(Link *link) { | |
180 | Route *route; | |
181 | int r; | |
182 | ||
183 | assert(link); | |
184 | assert(link->network); | |
ef1ba606 | 185 | assert(link->state == LINK_STATE_SETTING_ADDRESSES); |
f882c247 | 186 | |
ef1ba606 | 187 | link->state = LINK_STATE_SETTING_ROUTES; |
f882c247 | 188 | |
f5be5601 | 189 | if (!link->network->static_routes && !link->dhcp_route) |
dd3efc09 | 190 | return link_enter_configured(link); |
f882c247 | 191 | |
449f7554 TG |
192 | log_debug("%s: setting routes", link->ifname); |
193 | ||
f048a16b | 194 | LIST_FOREACH(static_routes, route, link->network->static_routes) { |
f882c247 | 195 | r = route_configure(route, link, &route_handler); |
dd3efc09 | 196 | if (r < 0) { |
449f7554 | 197 | log_warning("%s: could not set routes", link->ifname); |
ef1ba606 TG |
198 | link_enter_failed(link); |
199 | return r; | |
dd3efc09 | 200 | } |
c166a070 | 201 | |
f5be5601 TG |
202 | link->route_messages ++; |
203 | } | |
204 | ||
205 | if (link->dhcp_route) { | |
206 | r = route_configure(link->dhcp_route, link, &route_handler); | |
207 | if (r < 0) { | |
449f7554 | 208 | log_warning("%s: could not set routes", link->ifname); |
f5be5601 TG |
209 | link_enter_failed(link); |
210 | return r; | |
211 | } | |
212 | ||
213 | link->route_messages ++; | |
f882c247 TG |
214 | } |
215 | ||
216 | return 0; | |
217 | } | |
218 | ||
f882c247 TG |
219 | static int address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
220 | Link *link = userdata; | |
221 | int r; | |
222 | ||
f5be5601 TG |
223 | assert(m); |
224 | assert(link); | |
225 | assert(link->ifname); | |
226 | assert(link->addr_messages > 0); | |
ef1ba606 | 227 | assert(link->state == LINK_STATE_SETTING_ADDRESSES || link->state == LINK_STATE_FAILED); |
f882c247 | 228 | |
f5be5601 | 229 | link->addr_messages --; |
f882c247 TG |
230 | |
231 | if (link->state == LINK_STATE_FAILED) | |
232 | return 1; | |
233 | ||
234 | r = sd_rtnl_message_get_errno(m); | |
c166a070 | 235 | if (r < 0 && r != -EEXIST) |
449f7554 | 236 | log_warning("%s: could not set address: %s", |
c166a070 | 237 | link->ifname, strerror(-r)); |
f882c247 | 238 | |
f5be5601 | 239 | if (link->addr_messages == 0) { |
449f7554 | 240 | log_debug("%s: addresses set", link->ifname); |
ef1ba606 | 241 | link_enter_set_routes(link); |
dd3efc09 | 242 | } |
f882c247 TG |
243 | |
244 | return 1; | |
245 | } | |
246 | ||
247 | static int link_enter_set_addresses(Link *link) { | |
248 | Address *address; | |
249 | int r; | |
250 | ||
251 | assert(link); | |
252 | assert(link->network); | |
f5be5601 | 253 | assert(link->state != _LINK_STATE_INVALID); |
f882c247 | 254 | |
ef1ba606 | 255 | link->state = LINK_STATE_SETTING_ADDRESSES; |
f882c247 | 256 | |
f5be5601 | 257 | if (!link->network->static_addresses && !link->dhcp_address) |
ef1ba606 | 258 | return link_enter_set_routes(link); |
f882c247 | 259 | |
449f7554 TG |
260 | log_debug("%s: setting addresses", link->ifname); |
261 | ||
f048a16b | 262 | LIST_FOREACH(static_addresses, address, link->network->static_addresses) { |
f882c247 | 263 | r = address_configure(address, link, &address_handler); |
dd3efc09 | 264 | if (r < 0) { |
449f7554 | 265 | log_warning("%s: could not set addresses", link->ifname); |
ef1ba606 TG |
266 | link_enter_failed(link); |
267 | return r; | |
dd3efc09 | 268 | } |
c166a070 | 269 | |
f5be5601 TG |
270 | link->addr_messages ++; |
271 | } | |
272 | ||
273 | if (link->dhcp_address) { | |
274 | r = address_configure(link->dhcp_address, link, &address_handler); | |
275 | if (r < 0) { | |
449f7554 | 276 | log_warning("%s: could not set addresses", link->ifname); |
f5be5601 TG |
277 | link_enter_failed(link); |
278 | return r; | |
279 | } | |
280 | ||
281 | link->addr_messages ++; | |
f882c247 TG |
282 | } |
283 | ||
284 | return 0; | |
285 | } | |
286 | ||
dd3efc09 TG |
287 | static int link_up_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
288 | Link *link = userdata; | |
289 | int r; | |
290 | ||
1746cf2a TG |
291 | assert(link); |
292 | ||
293 | if (link->state == LINK_STATE_FAILED) | |
294 | return 1; | |
295 | ||
dd3efc09 TG |
296 | r = sd_rtnl_message_get_errno(m); |
297 | if (r < 0) { | |
449f7554 | 298 | log_warning("%s: could not bring up interface: %s", |
dd3efc09 TG |
299 | link->ifname, strerror(-r)); |
300 | link_enter_failed(link); | |
301 | } | |
f882c247 | 302 | |
1746cf2a TG |
303 | log_debug("%s: brought up interface", link->ifname); |
304 | ||
f882c247 TG |
305 | return 1; |
306 | } | |
307 | ||
308 | static int link_up(Link *link) { | |
f579559b TG |
309 | _cleanup_sd_rtnl_message_unref_ sd_rtnl_message *req = NULL; |
310 | int r; | |
311 | ||
f882c247 TG |
312 | assert(link); |
313 | assert(link->manager); | |
314 | assert(link->manager->rtnl); | |
315 | ||
449f7554 TG |
316 | log_debug("%s: bringing up link", link->ifname); |
317 | ||
0f49a5f7 | 318 | r = sd_rtnl_message_link_new(RTM_SETLINK, link->ifindex, &req); |
f579559b | 319 | if (r < 0) { |
0f49a5f7 | 320 | log_error("Could not allocate RTM_SETLINK message"); |
f579559b TG |
321 | return r; |
322 | } | |
323 | ||
fc25d7f8 TG |
324 | r = sd_rtnl_message_link_set_flags(req, IFF_UP); |
325 | if (r < 0) { | |
326 | log_error("Could not set link flags"); | |
327 | return r; | |
328 | } | |
329 | ||
dd3efc09 | 330 | r = sd_rtnl_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL); |
f579559b | 331 | if (r < 0) { |
f882c247 | 332 | log_error("Could not send rtnetlink message: %s", strerror(-r)); |
f579559b TG |
333 | return r; |
334 | } | |
335 | ||
f882c247 TG |
336 | return 0; |
337 | } | |
338 | ||
ef1ba606 | 339 | static int link_bridge_joined(Link *link) { |
f882c247 TG |
340 | int r; |
341 | ||
ef1ba606 TG |
342 | assert(link); |
343 | assert(link->state == LINK_STATE_JOINING_BRIDGE); | |
f5be5601 | 344 | assert(link->network); |
dd3efc09 | 345 | |
f882c247 | 346 | r = link_up(link); |
ef1ba606 TG |
347 | if (r < 0) { |
348 | link_enter_failed(link); | |
349 | return r; | |
350 | } | |
f882c247 | 351 | |
1746cf2a TG |
352 | if (!link->network->dhcp) |
353 | return link_enter_set_addresses(link); | |
ef1ba606 TG |
354 | |
355 | return 0; | |
02b59d57 TG |
356 | } |
357 | ||
358 | static int bridge_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { | |
359 | Link *link = userdata; | |
360 | int r; | |
361 | ||
1746cf2a | 362 | assert(link); |
ef1ba606 TG |
363 | assert(link->state == LINK_STATE_JOINING_BRIDGE || link->state == LINK_STATE_FAILED); |
364 | assert(link->network); | |
02b59d57 TG |
365 | |
366 | if (link->state == LINK_STATE_FAILED) | |
367 | return 1; | |
368 | ||
369 | r = sd_rtnl_message_get_errno(m); | |
ef1ba606 | 370 | if (r < 0) { |
449f7554 | 371 | log_warning("%s: could not join bridge '%s': %s", |
dd3efc09 | 372 | link->ifname, link->network->bridge->name, strerror(-r)); |
ef1ba606 TG |
373 | link_enter_failed(link); |
374 | return 1; | |
375 | } else | |
449f7554 | 376 | log_debug("%s: joined bridge '%s'", |
dd3efc09 | 377 | link->ifname, link->network->bridge->name); |
02b59d57 | 378 | |
ef1ba606 | 379 | link_bridge_joined(link); |
02b59d57 TG |
380 | |
381 | return 1; | |
382 | } | |
383 | ||
384 | static int link_enter_join_bridge(Link *link) { | |
385 | int r; | |
386 | ||
387 | assert(link); | |
388 | assert(link->network); | |
ef1ba606 | 389 | assert(link->state == _LINK_STATE_INVALID); |
02b59d57 | 390 | |
ef1ba606 | 391 | link->state = LINK_STATE_JOINING_BRIDGE; |
02b59d57 | 392 | |
ef1ba606 TG |
393 | if (!link->network->bridge) |
394 | return link_bridge_joined(link); | |
02b59d57 | 395 | |
449f7554 TG |
396 | log_debug("%s: joining bridge", link->ifname); |
397 | ||
02b59d57 | 398 | r = bridge_join(link->network->bridge, link, &bridge_handler); |
dd3efc09 | 399 | if (r < 0) { |
449f7554 | 400 | log_warning("%s: could not join bridge '%s'", link->ifname, |
dd3efc09 | 401 | link->network->bridge->name); |
ef1ba606 TG |
402 | link_enter_failed(link); |
403 | return r; | |
404 | } | |
405 | ||
406 | return 0; | |
407 | } | |
408 | ||
409 | static int link_get_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { | |
410 | Link *link = userdata; | |
411 | int r; | |
412 | ||
1746cf2a TG |
413 | assert(link); |
414 | ||
415 | if (link->state == LINK_STATE_FAILED) | |
416 | return 1; | |
417 | ||
ef1ba606 TG |
418 | r = sd_rtnl_message_get_errno(m); |
419 | if (r < 0) { | |
449f7554 | 420 | log_warning("%s: could not get state: %s", |
ef1ba606 TG |
421 | link->ifname, strerror(-r)); |
422 | link_enter_failed(link); | |
423 | } | |
424 | ||
1746cf2a TG |
425 | log_debug("%s: got link state", link->ifname); |
426 | ||
5eb036ca TG |
427 | link_update(link, m); |
428 | ||
ef1ba606 TG |
429 | return 1; |
430 | } | |
431 | ||
432 | static int link_get(Link *link) { | |
433 | _cleanup_sd_rtnl_message_unref_ sd_rtnl_message *req = NULL; | |
434 | int r; | |
435 | ||
436 | assert(link); | |
437 | assert(link->manager); | |
438 | assert(link->manager->rtnl); | |
439 | ||
449f7554 TG |
440 | log_debug("%s: requesting link status", link->ifname); |
441 | ||
ef1ba606 TG |
442 | r = sd_rtnl_message_link_new(RTM_GETLINK, link->ifindex, &req); |
443 | if (r < 0) { | |
444 | log_error("Could not allocate RTM_GETLINK message"); | |
445 | return r; | |
446 | } | |
447 | ||
448 | r = sd_rtnl_call_async(link->manager->rtnl, req, link_get_handler, link, 0, NULL); | |
449 | if (r < 0) { | |
450 | log_error("Could not send rtnetlink message: %s", strerror(-r)); | |
451 | return r; | |
dd3efc09 | 452 | } |
02b59d57 TG |
453 | |
454 | return 0; | |
455 | } | |
456 | ||
457 | int link_configure(Link *link) { | |
458 | int r; | |
459 | ||
ef1ba606 TG |
460 | assert(link); |
461 | assert(link->network); | |
462 | assert(link->state == _LINK_STATE_INVALID); | |
463 | ||
dd3efc09 | 464 | r = link_get(link); |
ef1ba606 TG |
465 | if (r < 0) { |
466 | link_enter_failed(link); | |
467 | return r; | |
468 | } | |
dd3efc09 | 469 | |
1746cf2a | 470 | return link_enter_join_bridge(link); |
f579559b | 471 | } |
dd3efc09 | 472 | |
f5be5601 TG |
473 | static int address_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
474 | Link *link = userdata; | |
475 | int r; | |
476 | ||
477 | assert(m); | |
478 | assert(link); | |
479 | assert(link->ifname); | |
480 | ||
481 | if (link->state == LINK_STATE_FAILED) | |
482 | return 1; | |
483 | ||
484 | r = sd_rtnl_message_get_errno(m); | |
485 | if (r < 0 && r != -EEXIST) | |
449f7554 | 486 | log_warning("%s: could not drop address: %s", |
f5be5601 TG |
487 | link->ifname, strerror(-r)); |
488 | ||
489 | return 1; | |
490 | } | |
491 | ||
492 | static void dhcp_handler(sd_dhcp_client *client, int event, void *userdata) { | |
493 | Link *link = userdata; | |
494 | struct in_addr address; | |
495 | struct in_addr netmask; | |
496 | struct in_addr gateway; | |
497 | int prefixlen; | |
498 | int r; | |
499 | ||
1746cf2a TG |
500 | assert(link); |
501 | ||
f5be5601 TG |
502 | if (link->state == LINK_STATE_FAILED) |
503 | return; | |
504 | ||
505 | if (event < 0) { | |
449f7554 | 506 | log_warning("%s: DHCP error: %s", link->ifname, strerror(-event)); |
f5be5601 TG |
507 | link_enter_failed(link); |
508 | return; | |
509 | } | |
510 | ||
511 | if (event == DHCP_EVENT_NO_LEASE) | |
449f7554 | 512 | log_debug("%s: IP address in use.", link->ifname); |
f5be5601 TG |
513 | |
514 | if (event == DHCP_EVENT_IP_CHANGE || event == DHCP_EVENT_EXPIRED || | |
515 | event == DHCP_EVENT_STOP) { | |
b1b532f5 TG |
516 | if (link->dhcp_address) { |
517 | address_drop(link->dhcp_address, link, address_drop_handler); | |
f5be5601 | 518 | |
b1b532f5 TG |
519 | address_free(link->dhcp_address); |
520 | link->dhcp_address = NULL; | |
521 | } | |
f5be5601 | 522 | |
b1b532f5 TG |
523 | if (link->dhcp_route) { |
524 | route_free(link->dhcp_route); | |
525 | link->dhcp_route = NULL; | |
526 | } | |
f5be5601 TG |
527 | } |
528 | ||
529 | r = sd_dhcp_client_get_address(client, &address); | |
530 | if (r < 0) { | |
449f7554 | 531 | log_warning("%s: DHCP error: no address", link->ifname); |
f5be5601 TG |
532 | link_enter_failed(link); |
533 | return; | |
534 | } | |
535 | ||
536 | r = sd_dhcp_client_get_netmask(client, &netmask); | |
537 | if (r < 0) { | |
449f7554 | 538 | log_warning("%s: DHCP error: no netmask", link->ifname); |
f5be5601 TG |
539 | link_enter_failed(link); |
540 | return; | |
541 | } | |
542 | ||
543 | prefixlen = sd_dhcp_client_prefixlen(&netmask); | |
544 | if (prefixlen < 0) { | |
449f7554 | 545 | log_warning("%s: DHCP error: no prefixlen", link->ifname); |
f5be5601 TG |
546 | link_enter_failed(link); |
547 | return; | |
548 | } | |
549 | ||
550 | r = sd_dhcp_client_get_router(client, &gateway); | |
551 | if (r < 0) { | |
449f7554 | 552 | log_warning("%s: DHCP error: no router", link->ifname); |
f5be5601 TG |
553 | link_enter_failed(link); |
554 | return; | |
555 | } | |
556 | ||
557 | if (event == DHCP_EVENT_IP_CHANGE || event == DHCP_EVENT_IP_ACQUIRE) { | |
558 | _cleanup_address_free_ Address *addr = NULL; | |
559 | _cleanup_route_free_ Route *rt = NULL; | |
560 | ||
449f7554 | 561 | log_info("%s: received config over DHCPv4", link->ifname); |
f5be5601 TG |
562 | |
563 | r = address_new_dynamic(&addr); | |
564 | if (r < 0) { | |
565 | log_error("Could not allocate address"); | |
566 | link_enter_failed(link); | |
567 | return; | |
568 | } | |
569 | ||
570 | addr->family = AF_INET; | |
571 | addr->in_addr.in = address; | |
572 | addr->prefixlen = prefixlen; | |
573 | addr->netmask = netmask; | |
574 | ||
575 | r = route_new_dynamic(&rt); | |
576 | if (r < 0) { | |
577 | log_error("Could not allocate route"); | |
578 | link_enter_failed(link); | |
579 | return; | |
580 | } | |
581 | ||
582 | rt->family = AF_INET; | |
583 | rt->in_addr.in = gateway; | |
584 | ||
585 | link->dhcp_address = addr; | |
586 | link->dhcp_route = rt; | |
587 | addr = NULL; | |
588 | rt = NULL; | |
589 | ||
590 | link_enter_set_addresses(link); | |
591 | } | |
592 | ||
593 | return; | |
594 | } | |
595 | ||
596 | static int link_acquire_conf(Link *link) { | |
597 | int r; | |
598 | ||
599 | assert(link); | |
600 | assert(link->network); | |
601 | assert(link->network->dhcp); | |
602 | assert(link->manager); | |
603 | assert(link->manager->event); | |
604 | ||
605 | if (!link->dhcp) { | |
606 | link->dhcp = sd_dhcp_client_new(link->manager->event); | |
607 | if (!link->dhcp) | |
608 | return -ENOMEM; | |
609 | ||
610 | r = sd_dhcp_client_set_index(link->dhcp, link->ifindex); | |
611 | if (r < 0) | |
612 | return r; | |
613 | ||
614 | r = sd_dhcp_client_set_mac(link->dhcp, &link->mac); | |
615 | if (r < 0) | |
616 | return r; | |
617 | ||
618 | r = sd_dhcp_client_set_callback(link->dhcp, dhcp_handler, link); | |
619 | if (r < 0) | |
620 | return r; | |
621 | } | |
622 | ||
623 | r = sd_dhcp_client_start(link->dhcp); | |
624 | if (r < 0) | |
625 | return r; | |
626 | ||
627 | return 0; | |
628 | } | |
629 | ||
22936833 TG |
630 | int link_update(Link *link, sd_rtnl_message *m) { |
631 | unsigned flags; | |
632 | int r; | |
633 | ||
dd3efc09 | 634 | assert(link); |
06a6e593 | 635 | assert(link->network); |
22936833 TG |
636 | assert(m); |
637 | ||
1746cf2a TG |
638 | if (link->state == LINK_STATE_FAILED) |
639 | return 0; | |
640 | ||
22936833 TG |
641 | r = sd_rtnl_message_link_get_flags(m, &flags); |
642 | if (r < 0) { | |
449f7554 | 643 | log_warning("%s: could not get link flags", link->ifname); |
22936833 TG |
644 | return r; |
645 | } | |
dd3efc09 TG |
646 | |
647 | if (link->flags & IFF_UP && !(flags & IFF_UP)) | |
449f7554 | 648 | log_info("%s: interface is down", link->ifname); |
dd3efc09 | 649 | else if (!(link->flags & IFF_UP) && flags & IFF_UP) |
449f7554 | 650 | log_info("%s: interface is up", link->ifname); |
dd3efc09 | 651 | |
f5be5601 | 652 | if (link->flags & IFF_LOWER_UP && !(flags & IFF_LOWER_UP)) { |
449f7554 | 653 | log_info("%s: disconnected", link->ifname); |
f5be5601 TG |
654 | |
655 | if (link->network->dhcp) { | |
656 | r = sd_dhcp_client_stop(link->dhcp); | |
657 | if (r < 0) { | |
658 | link_enter_failed(link); | |
659 | return r; | |
660 | } | |
661 | } | |
662 | } else if (!(link->flags & IFF_LOWER_UP) && flags & IFF_LOWER_UP) { | |
449f7554 | 663 | log_info("%s: connected", link->ifname); |
dd3efc09 | 664 | |
06a6e593 | 665 | if (link->network->dhcp) { |
f5be5601 TG |
666 | r = link_acquire_conf(link); |
667 | if (r < 0) { | |
668 | link_enter_failed(link); | |
669 | return r; | |
670 | } | |
671 | } | |
672 | } | |
673 | ||
dd3efc09 TG |
674 | link->flags = flags; |
675 | ||
1746cf2a | 676 | log_debug("%s: updated link state", link->ifname); |
449f7554 | 677 | |
dd3efc09 TG |
678 | return 0; |
679 | } |