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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 | ||
291 | r = sd_rtnl_message_get_errno(m); | |
292 | if (r < 0) { | |
449f7554 | 293 | log_warning("%s: could not bring up interface: %s", |
dd3efc09 TG |
294 | link->ifname, strerror(-r)); |
295 | link_enter_failed(link); | |
296 | } | |
f882c247 TG |
297 | |
298 | return 1; | |
299 | } | |
300 | ||
301 | static int link_up(Link *link) { | |
f579559b TG |
302 | _cleanup_sd_rtnl_message_unref_ sd_rtnl_message *req = NULL; |
303 | int r; | |
304 | ||
f882c247 TG |
305 | assert(link); |
306 | assert(link->manager); | |
307 | assert(link->manager->rtnl); | |
308 | ||
449f7554 TG |
309 | log_debug("%s: bringing up link", link->ifname); |
310 | ||
0f49a5f7 | 311 | r = sd_rtnl_message_link_new(RTM_SETLINK, link->ifindex, &req); |
f579559b | 312 | if (r < 0) { |
0f49a5f7 | 313 | log_error("Could not allocate RTM_SETLINK message"); |
f579559b TG |
314 | return r; |
315 | } | |
316 | ||
fc25d7f8 TG |
317 | r = sd_rtnl_message_link_set_flags(req, IFF_UP); |
318 | if (r < 0) { | |
319 | log_error("Could not set link flags"); | |
320 | return r; | |
321 | } | |
322 | ||
dd3efc09 | 323 | r = sd_rtnl_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL); |
f579559b | 324 | if (r < 0) { |
f882c247 | 325 | log_error("Could not send rtnetlink message: %s", strerror(-r)); |
f579559b TG |
326 | return r; |
327 | } | |
328 | ||
f882c247 TG |
329 | return 0; |
330 | } | |
331 | ||
ef1ba606 | 332 | static int link_bridge_joined(Link *link) { |
f882c247 TG |
333 | int r; |
334 | ||
ef1ba606 TG |
335 | assert(link); |
336 | assert(link->state == LINK_STATE_JOINING_BRIDGE); | |
f5be5601 | 337 | assert(link->network); |
dd3efc09 | 338 | |
f882c247 | 339 | r = link_up(link); |
ef1ba606 TG |
340 | if (r < 0) { |
341 | link_enter_failed(link); | |
342 | return r; | |
343 | } | |
f882c247 | 344 | |
f5be5601 TG |
345 | if (!link->network->dhcp) { |
346 | r = link_enter_set_addresses(link); | |
347 | if (r < 0) | |
348 | link_enter_failed(link); | |
349 | return r; | |
ef1ba606 TG |
350 | } |
351 | ||
352 | return 0; | |
02b59d57 TG |
353 | } |
354 | ||
355 | static int bridge_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { | |
356 | Link *link = userdata; | |
357 | int r; | |
358 | ||
ef1ba606 TG |
359 | assert(link->state == LINK_STATE_JOINING_BRIDGE || link->state == LINK_STATE_FAILED); |
360 | assert(link->network); | |
02b59d57 TG |
361 | |
362 | if (link->state == LINK_STATE_FAILED) | |
363 | return 1; | |
364 | ||
365 | r = sd_rtnl_message_get_errno(m); | |
ef1ba606 | 366 | if (r < 0) { |
449f7554 | 367 | log_warning("%s: could not join bridge '%s': %s", |
dd3efc09 | 368 | link->ifname, link->network->bridge->name, strerror(-r)); |
ef1ba606 TG |
369 | link_enter_failed(link); |
370 | return 1; | |
371 | } else | |
449f7554 | 372 | log_debug("%s: joined bridge '%s'", |
dd3efc09 | 373 | link->ifname, link->network->bridge->name); |
02b59d57 | 374 | |
ef1ba606 | 375 | link_bridge_joined(link); |
02b59d57 TG |
376 | |
377 | return 1; | |
378 | } | |
379 | ||
380 | static int link_enter_join_bridge(Link *link) { | |
381 | int r; | |
382 | ||
383 | assert(link); | |
384 | assert(link->network); | |
ef1ba606 | 385 | assert(link->state == _LINK_STATE_INVALID); |
02b59d57 | 386 | |
ef1ba606 | 387 | link->state = LINK_STATE_JOINING_BRIDGE; |
02b59d57 | 388 | |
ef1ba606 TG |
389 | if (!link->network->bridge) |
390 | return link_bridge_joined(link); | |
02b59d57 | 391 | |
449f7554 TG |
392 | log_debug("%s: joining bridge", link->ifname); |
393 | ||
02b59d57 | 394 | r = bridge_join(link->network->bridge, link, &bridge_handler); |
dd3efc09 | 395 | if (r < 0) { |
449f7554 | 396 | log_warning("%s: could not join bridge '%s'", link->ifname, |
dd3efc09 | 397 | link->network->bridge->name); |
ef1ba606 TG |
398 | link_enter_failed(link); |
399 | return r; | |
400 | } | |
401 | ||
402 | return 0; | |
403 | } | |
404 | ||
405 | static int link_get_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { | |
406 | Link *link = userdata; | |
407 | int r; | |
408 | ||
409 | r = sd_rtnl_message_get_errno(m); | |
410 | if (r < 0) { | |
449f7554 | 411 | log_warning("%s: could not get state: %s", |
ef1ba606 TG |
412 | link->ifname, strerror(-r)); |
413 | link_enter_failed(link); | |
414 | } | |
415 | ||
5eb036ca TG |
416 | link_update(link, m); |
417 | ||
ef1ba606 TG |
418 | return 1; |
419 | } | |
420 | ||
421 | static int link_get(Link *link) { | |
422 | _cleanup_sd_rtnl_message_unref_ sd_rtnl_message *req = NULL; | |
423 | int r; | |
424 | ||
425 | assert(link); | |
426 | assert(link->manager); | |
427 | assert(link->manager->rtnl); | |
428 | ||
449f7554 TG |
429 | log_debug("%s: requesting link status", link->ifname); |
430 | ||
ef1ba606 TG |
431 | r = sd_rtnl_message_link_new(RTM_GETLINK, link->ifindex, &req); |
432 | if (r < 0) { | |
433 | log_error("Could not allocate RTM_GETLINK message"); | |
434 | return r; | |
435 | } | |
436 | ||
437 | r = sd_rtnl_call_async(link->manager->rtnl, req, link_get_handler, link, 0, NULL); | |
438 | if (r < 0) { | |
439 | log_error("Could not send rtnetlink message: %s", strerror(-r)); | |
440 | return r; | |
dd3efc09 | 441 | } |
02b59d57 TG |
442 | |
443 | return 0; | |
444 | } | |
445 | ||
446 | int link_configure(Link *link) { | |
447 | int r; | |
448 | ||
ef1ba606 TG |
449 | assert(link); |
450 | assert(link->network); | |
451 | assert(link->state == _LINK_STATE_INVALID); | |
452 | ||
dd3efc09 | 453 | r = link_get(link); |
ef1ba606 TG |
454 | if (r < 0) { |
455 | link_enter_failed(link); | |
456 | return r; | |
457 | } | |
dd3efc09 | 458 | |
02b59d57 | 459 | r = link_enter_join_bridge(link); |
f882c247 | 460 | if (r < 0) |
ef1ba606 | 461 | return r; |
f579559b TG |
462 | |
463 | return 0; | |
464 | } | |
dd3efc09 | 465 | |
f5be5601 TG |
466 | static int address_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
467 | Link *link = userdata; | |
468 | int r; | |
469 | ||
470 | assert(m); | |
471 | assert(link); | |
472 | assert(link->ifname); | |
473 | ||
474 | if (link->state == LINK_STATE_FAILED) | |
475 | return 1; | |
476 | ||
477 | r = sd_rtnl_message_get_errno(m); | |
478 | if (r < 0 && r != -EEXIST) | |
449f7554 | 479 | log_warning("%s: could not drop address: %s", |
f5be5601 TG |
480 | link->ifname, strerror(-r)); |
481 | ||
482 | return 1; | |
483 | } | |
484 | ||
485 | static void dhcp_handler(sd_dhcp_client *client, int event, void *userdata) { | |
486 | Link *link = userdata; | |
487 | struct in_addr address; | |
488 | struct in_addr netmask; | |
489 | struct in_addr gateway; | |
490 | int prefixlen; | |
491 | int r; | |
492 | ||
493 | if (link->state == LINK_STATE_FAILED) | |
494 | return; | |
495 | ||
496 | if (event < 0) { | |
449f7554 | 497 | log_warning("%s: DHCP error: %s", link->ifname, strerror(-event)); |
f5be5601 TG |
498 | link_enter_failed(link); |
499 | return; | |
500 | } | |
501 | ||
502 | if (event == DHCP_EVENT_NO_LEASE) | |
449f7554 | 503 | log_debug("%s: IP address in use.", link->ifname); |
f5be5601 TG |
504 | |
505 | if (event == DHCP_EVENT_IP_CHANGE || event == DHCP_EVENT_EXPIRED || | |
506 | event == DHCP_EVENT_STOP) { | |
507 | address_drop(link->dhcp_address, link, address_drop_handler); | |
508 | ||
509 | address_free(link->dhcp_address); | |
510 | link->dhcp_address = NULL; | |
511 | ||
512 | route_free(link->dhcp_route); | |
513 | link->dhcp_route = NULL; | |
514 | } | |
515 | ||
516 | r = sd_dhcp_client_get_address(client, &address); | |
517 | if (r < 0) { | |
449f7554 | 518 | log_warning("%s: DHCP error: no address", link->ifname); |
f5be5601 TG |
519 | link_enter_failed(link); |
520 | return; | |
521 | } | |
522 | ||
523 | r = sd_dhcp_client_get_netmask(client, &netmask); | |
524 | if (r < 0) { | |
449f7554 | 525 | log_warning("%s: DHCP error: no netmask", link->ifname); |
f5be5601 TG |
526 | link_enter_failed(link); |
527 | return; | |
528 | } | |
529 | ||
530 | prefixlen = sd_dhcp_client_prefixlen(&netmask); | |
531 | if (prefixlen < 0) { | |
449f7554 | 532 | log_warning("%s: DHCP error: no prefixlen", link->ifname); |
f5be5601 TG |
533 | link_enter_failed(link); |
534 | return; | |
535 | } | |
536 | ||
537 | r = sd_dhcp_client_get_router(client, &gateway); | |
538 | if (r < 0) { | |
449f7554 | 539 | log_warning("%s: DHCP error: no router", link->ifname); |
f5be5601 TG |
540 | link_enter_failed(link); |
541 | return; | |
542 | } | |
543 | ||
544 | if (event == DHCP_EVENT_IP_CHANGE || event == DHCP_EVENT_IP_ACQUIRE) { | |
545 | _cleanup_address_free_ Address *addr = NULL; | |
546 | _cleanup_route_free_ Route *rt = NULL; | |
547 | ||
449f7554 | 548 | log_info("%s: received config over DHCPv4", link->ifname); |
f5be5601 TG |
549 | |
550 | r = address_new_dynamic(&addr); | |
551 | if (r < 0) { | |
552 | log_error("Could not allocate address"); | |
553 | link_enter_failed(link); | |
554 | return; | |
555 | } | |
556 | ||
557 | addr->family = AF_INET; | |
558 | addr->in_addr.in = address; | |
559 | addr->prefixlen = prefixlen; | |
560 | addr->netmask = netmask; | |
561 | ||
562 | r = route_new_dynamic(&rt); | |
563 | if (r < 0) { | |
564 | log_error("Could not allocate route"); | |
565 | link_enter_failed(link); | |
566 | return; | |
567 | } | |
568 | ||
569 | rt->family = AF_INET; | |
570 | rt->in_addr.in = gateway; | |
571 | ||
572 | link->dhcp_address = addr; | |
573 | link->dhcp_route = rt; | |
574 | addr = NULL; | |
575 | rt = NULL; | |
576 | ||
577 | link_enter_set_addresses(link); | |
578 | } | |
579 | ||
580 | return; | |
581 | } | |
582 | ||
583 | static int link_acquire_conf(Link *link) { | |
584 | int r; | |
585 | ||
586 | assert(link); | |
587 | assert(link->network); | |
588 | assert(link->network->dhcp); | |
589 | assert(link->manager); | |
590 | assert(link->manager->event); | |
591 | ||
592 | if (!link->dhcp) { | |
593 | link->dhcp = sd_dhcp_client_new(link->manager->event); | |
594 | if (!link->dhcp) | |
595 | return -ENOMEM; | |
596 | ||
597 | r = sd_dhcp_client_set_index(link->dhcp, link->ifindex); | |
598 | if (r < 0) | |
599 | return r; | |
600 | ||
601 | r = sd_dhcp_client_set_mac(link->dhcp, &link->mac); | |
602 | if (r < 0) | |
603 | return r; | |
604 | ||
605 | r = sd_dhcp_client_set_callback(link->dhcp, dhcp_handler, link); | |
606 | if (r < 0) | |
607 | return r; | |
608 | } | |
609 | ||
610 | r = sd_dhcp_client_start(link->dhcp); | |
611 | if (r < 0) | |
612 | return r; | |
613 | ||
614 | return 0; | |
615 | } | |
616 | ||
22936833 TG |
617 | int link_update(Link *link, sd_rtnl_message *m) { |
618 | unsigned flags; | |
619 | int r; | |
620 | ||
dd3efc09 | 621 | assert(link); |
06a6e593 | 622 | assert(link->network); |
22936833 TG |
623 | assert(m); |
624 | ||
625 | r = sd_rtnl_message_link_get_flags(m, &flags); | |
626 | if (r < 0) { | |
449f7554 | 627 | log_warning("%s: could not get link flags", link->ifname); |
22936833 TG |
628 | return r; |
629 | } | |
dd3efc09 TG |
630 | |
631 | if (link->flags & IFF_UP && !(flags & IFF_UP)) | |
449f7554 | 632 | log_info("%s: interface is down", link->ifname); |
dd3efc09 | 633 | else if (!(link->flags & IFF_UP) && flags & IFF_UP) |
449f7554 | 634 | log_info("%s: interface is up", link->ifname); |
dd3efc09 | 635 | |
f5be5601 | 636 | if (link->flags & IFF_LOWER_UP && !(flags & IFF_LOWER_UP)) { |
449f7554 | 637 | log_info("%s: disconnected", link->ifname); |
f5be5601 TG |
638 | |
639 | if (link->network->dhcp) { | |
640 | r = sd_dhcp_client_stop(link->dhcp); | |
641 | if (r < 0) { | |
642 | link_enter_failed(link); | |
643 | return r; | |
644 | } | |
645 | } | |
646 | } else if (!(link->flags & IFF_LOWER_UP) && flags & IFF_LOWER_UP) { | |
449f7554 | 647 | log_info("%s: connected", link->ifname); |
dd3efc09 | 648 | |
06a6e593 | 649 | if (link->network->dhcp) { |
f5be5601 TG |
650 | r = link_acquire_conf(link); |
651 | if (r < 0) { | |
652 | link_enter_failed(link); | |
653 | return r; | |
654 | } | |
655 | } | |
656 | } | |
657 | ||
dd3efc09 TG |
658 | link->flags = flags; |
659 | ||
449f7554 TG |
660 | log_debug("%s: updated state", link->ifname); |
661 | ||
dd3efc09 TG |
662 | return 0; |
663 | } |