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3c9b8860 TG |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2013-2014 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 | ||
958b66ea | 25 | #include "hostname-util.h" |
3c9b8860 TG |
26 | #include "networkd-link.h" |
27 | #include "network-internal.h" | |
28 | #include "dhcp-lease-internal.h" | |
29 | ||
30 | static int dhcp4_route_handler(sd_rtnl *rtnl, sd_rtnl_message *m, | |
31 | void *userdata) { | |
32 | _cleanup_link_unref_ Link *link = userdata; | |
33 | int r; | |
34 | ||
35 | assert(link); | |
36 | assert(link->dhcp4_messages); | |
37 | ||
38 | link->dhcp4_messages --; | |
39 | ||
40 | r = sd_rtnl_message_get_errno(m); | |
41 | if (r < 0 && r != -EEXIST) { | |
79008bdd | 42 | log_link_error(link, "could not set DHCPv4 route: %s", |
3c9b8860 TG |
43 | strerror(-r)); |
44 | link_enter_failed(link); | |
45 | } | |
46 | ||
47 | if (!link->dhcp4_messages) { | |
48 | link->dhcp4_configured = true; | |
49 | link_client_handler(link); | |
50 | } | |
51 | ||
52 | return 1; | |
53 | } | |
54 | ||
55 | static int link_set_dhcp_routes(Link *link) { | |
56 | struct in_addr gateway; | |
57 | struct sd_dhcp_route *static_routes; | |
58 | int r, n, i; | |
59 | ||
60 | assert(link); | |
61 | assert(link->dhcp_lease); | |
62 | ||
63 | r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway); | |
64 | if (r < 0 && r != -ENOENT) { | |
79008bdd | 65 | log_link_warning(link, |
3c9b8860 TG |
66 | "DHCP error: could not get gateway: %s", |
67 | strerror(-r)); | |
68 | return r; | |
69 | } | |
70 | if (r >= 0) { | |
46b0c76e | 71 | struct in_addr address; |
3c9b8860 TG |
72 | _cleanup_route_free_ Route *route = NULL; |
73 | _cleanup_route_free_ Route *route_gw = NULL; | |
74 | ||
46b0c76e ERB |
75 | r = sd_dhcp_lease_get_address(link->dhcp_lease, &address); |
76 | if (r < 0) { | |
79008bdd | 77 | log_link_warning(link, |
46b0c76e ERB |
78 | "DHCP error: could not get address: %s", |
79 | strerror(-r)); | |
80 | return r; | |
81 | } | |
82 | ||
3c9b8860 TG |
83 | r = route_new_dynamic(&route, RTPROT_DHCP); |
84 | if (r < 0) { | |
79008bdd | 85 | log_link_error(link, |
3c9b8860 TG |
86 | "Could not allocate route: %s", |
87 | strerror(-r)); | |
88 | return r; | |
89 | } | |
90 | ||
91 | r = route_new_dynamic(&route_gw, RTPROT_DHCP); | |
92 | if (r < 0) { | |
79008bdd | 93 | log_link_error(link, |
3c9b8860 TG |
94 | "Could not allocate route: %s", |
95 | strerror(-r)); | |
96 | return r; | |
97 | } | |
98 | ||
99 | /* The dhcp netmask may mask out the gateway. Add an explicit | |
100 | * route for the gw host so that we can route no matter the | |
101 | * netmask or existing kernel route tables. */ | |
102 | route_gw->family = AF_INET; | |
103 | route_gw->dst_addr.in = gateway; | |
104 | route_gw->dst_prefixlen = 32; | |
46b0c76e | 105 | route_gw->prefsrc_addr.in = address; |
3c9b8860 | 106 | route_gw->scope = RT_SCOPE_LINK; |
84b5b79a | 107 | route_gw->metrics = link->network->dhcp_route_metric; |
3c9b8860 TG |
108 | |
109 | r = route_configure(route_gw, link, &dhcp4_route_handler); | |
110 | if (r < 0) { | |
79008bdd | 111 | log_link_warning(link, |
3c9b8860 TG |
112 | "could not set host route: %s", |
113 | strerror(-r)); | |
114 | return r; | |
115 | } | |
116 | ||
117 | link->dhcp4_messages ++; | |
118 | ||
119 | route->family = AF_INET; | |
120 | route->in_addr.in = gateway; | |
46b0c76e | 121 | route->prefsrc_addr.in = address; |
84b5b79a | 122 | route->metrics = link->network->dhcp_route_metric; |
3c9b8860 TG |
123 | |
124 | r = route_configure(route, link, &dhcp4_route_handler); | |
125 | if (r < 0) { | |
79008bdd | 126 | log_link_warning(link, |
3c9b8860 TG |
127 | "could not set routes: %s", |
128 | strerror(-r)); | |
129 | link_enter_failed(link); | |
130 | return r; | |
131 | } | |
132 | ||
133 | link->dhcp4_messages ++; | |
134 | } | |
135 | ||
136 | n = sd_dhcp_lease_get_routes(link->dhcp_lease, &static_routes); | |
137 | if (n == -ENOENT) | |
138 | return 0; | |
139 | if (n < 0) { | |
79008bdd | 140 | log_link_warning(link, |
3c9b8860 TG |
141 | "DHCP error: could not get routes: %s", |
142 | strerror(-n)); | |
143 | ||
144 | return n; | |
145 | } | |
146 | ||
147 | for (i = 0; i < n; i++) { | |
148 | _cleanup_route_free_ Route *route = NULL; | |
149 | ||
150 | r = route_new_dynamic(&route, RTPROT_DHCP); | |
151 | if (r < 0) { | |
79008bdd | 152 | log_link_error(link, "Could not allocate route: %s", |
3c9b8860 TG |
153 | strerror(-r)); |
154 | return r; | |
155 | } | |
156 | ||
157 | route->family = AF_INET; | |
158 | route->in_addr.in = static_routes[i].gw_addr; | |
159 | route->dst_addr.in = static_routes[i].dst_addr; | |
160 | route->dst_prefixlen = static_routes[i].dst_prefixlen; | |
84b5b79a | 161 | route->metrics = link->network->dhcp_route_metric; |
3c9b8860 TG |
162 | |
163 | r = route_configure(route, link, &dhcp4_route_handler); | |
164 | if (r < 0) { | |
79008bdd | 165 | log_link_warning(link, |
3c9b8860 TG |
166 | "could not set host route: %s", |
167 | strerror(-r)); | |
168 | return r; | |
169 | } | |
170 | ||
171 | link->dhcp4_messages ++; | |
172 | } | |
173 | ||
174 | return 0; | |
175 | } | |
176 | ||
177 | static int dhcp_lease_lost(Link *link) { | |
178 | _cleanup_address_free_ Address *address = NULL; | |
179 | struct in_addr addr; | |
180 | struct in_addr netmask; | |
181 | struct in_addr gateway; | |
f414a269 | 182 | unsigned prefixlen = 0; |
3c9b8860 TG |
183 | int r; |
184 | ||
185 | assert(link); | |
186 | assert(link->dhcp_lease); | |
187 | ||
79008bdd | 188 | log_link_warning(link, "DHCP lease lost"); |
3c9b8860 TG |
189 | |
190 | if (link->network->dhcp_routes) { | |
191 | struct sd_dhcp_route *routes; | |
192 | int n, i; | |
193 | ||
194 | n = sd_dhcp_lease_get_routes(link->dhcp_lease, &routes); | |
195 | if (n >= 0) { | |
196 | for (i = 0; i < n; i++) { | |
197 | _cleanup_route_free_ Route *route = NULL; | |
198 | ||
199 | r = route_new_dynamic(&route, RTPROT_UNSPEC); | |
200 | if (r >= 0) { | |
201 | route->family = AF_INET; | |
202 | route->in_addr.in = routes[i].gw_addr; | |
203 | route->dst_addr.in = routes[i].dst_addr; | |
204 | route->dst_prefixlen = routes[i].dst_prefixlen; | |
205 | ||
206 | route_drop(route, link, | |
207 | &link_route_drop_handler); | |
208 | } | |
209 | } | |
210 | } | |
211 | } | |
212 | ||
213 | r = address_new_dynamic(&address); | |
214 | if (r >= 0) { | |
215 | r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway); | |
216 | if (r >= 0) { | |
217 | _cleanup_route_free_ Route *route_gw = NULL; | |
218 | _cleanup_route_free_ Route *route = NULL; | |
219 | ||
220 | r = route_new_dynamic(&route_gw, RTPROT_UNSPEC); | |
221 | if (r >= 0) { | |
222 | route_gw->family = AF_INET; | |
223 | route_gw->dst_addr.in = gateway; | |
224 | route_gw->dst_prefixlen = 32; | |
225 | route_gw->scope = RT_SCOPE_LINK; | |
226 | ||
227 | route_drop(route_gw, link, | |
228 | &link_route_drop_handler); | |
229 | } | |
230 | ||
231 | r = route_new_dynamic(&route, RTPROT_UNSPEC); | |
232 | if (r >= 0) { | |
233 | route->family = AF_INET; | |
234 | route->in_addr.in = gateway; | |
235 | ||
236 | route_drop(route, link, | |
237 | &link_route_drop_handler); | |
238 | } | |
239 | } | |
240 | ||
f414a269 TG |
241 | r = sd_dhcp_lease_get_address(link->dhcp_lease, &addr); |
242 | if (r >= 0) { | |
243 | r = sd_dhcp_lease_get_netmask(link->dhcp_lease, &netmask); | |
244 | if (r >= 0) | |
245 | prefixlen = in_addr_netmask_to_prefixlen(&netmask); | |
3c9b8860 | 246 | |
f414a269 TG |
247 | address->family = AF_INET; |
248 | address->in_addr.in = addr; | |
249 | address->prefixlen = prefixlen; | |
3c9b8860 | 250 | |
f414a269 TG |
251 | address_drop(address, link, &link_address_drop_handler); |
252 | } | |
3c9b8860 TG |
253 | } |
254 | ||
255 | if (link->network->dhcp_mtu) { | |
256 | uint16_t mtu; | |
257 | ||
258 | r = sd_dhcp_lease_get_mtu(link->dhcp_lease, &mtu); | |
259 | if (r >= 0 && link->original_mtu != mtu) { | |
260 | r = link_set_mtu(link, link->original_mtu); | |
261 | if (r < 0) { | |
79008bdd | 262 | log_link_warning(link, |
3c9b8860 TG |
263 | "DHCP error: could not reset MTU"); |
264 | link_enter_failed(link); | |
265 | return r; | |
266 | } | |
267 | } | |
268 | } | |
269 | ||
270 | if (link->network->dhcp_hostname) { | |
271 | const char *hostname = NULL; | |
272 | ||
273 | r = sd_dhcp_lease_get_hostname(link->dhcp_lease, &hostname); | |
274 | if (r >= 0 && hostname) { | |
275 | r = link_set_hostname(link, ""); | |
276 | if (r < 0) | |
79008bdd | 277 | log_link_error(link, |
3c9b8860 TG |
278 | "Failed to reset transient hostname"); |
279 | } | |
280 | } | |
281 | ||
282 | link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease); | |
283 | link->dhcp4_configured = false; | |
284 | ||
285 | return 0; | |
286 | } | |
287 | ||
288 | static int dhcp4_address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, | |
289 | void *userdata) { | |
290 | _cleanup_link_unref_ Link *link = userdata; | |
291 | int r; | |
292 | ||
293 | assert(link); | |
294 | ||
295 | r = sd_rtnl_message_get_errno(m); | |
296 | if (r < 0 && r != -EEXIST) { | |
79008bdd | 297 | log_link_error(link, "could not set DHCPv4 address: %s", |
3c9b8860 TG |
298 | strerror(-r)); |
299 | link_enter_failed(link); | |
45af44d4 TG |
300 | } else if (r >= 0) |
301 | link_rtnl_process_address(rtnl, m, link->manager); | |
3c9b8860 TG |
302 | |
303 | link_set_dhcp_routes(link); | |
304 | ||
305 | return 1; | |
306 | } | |
307 | ||
308 | static int dhcp4_update_address(Link *link, | |
309 | struct in_addr *address, | |
310 | struct in_addr *netmask, | |
311 | uint32_t lifetime) { | |
312 | _cleanup_address_free_ Address *addr = NULL; | |
313 | unsigned prefixlen; | |
314 | int r; | |
315 | ||
316 | assert(address); | |
317 | assert(netmask); | |
318 | assert(lifetime); | |
319 | ||
320 | prefixlen = in_addr_netmask_to_prefixlen(netmask); | |
321 | ||
322 | r = address_new_dynamic(&addr); | |
323 | if (r < 0) | |
324 | return r; | |
325 | ||
326 | addr->family = AF_INET; | |
327 | addr->in_addr.in.s_addr = address->s_addr; | |
328 | addr->cinfo.ifa_prefered = lifetime; | |
329 | addr->cinfo.ifa_valid = lifetime; | |
330 | addr->prefixlen = prefixlen; | |
331 | addr->broadcast.s_addr = address->s_addr | ~netmask->s_addr; | |
332 | ||
333 | /* use update rather than configure so that we will update the | |
334 | * lifetime of an existing address if it has already been configured */ | |
335 | r = address_update(addr, link, &dhcp4_address_handler); | |
336 | if (r < 0) | |
337 | return r; | |
338 | ||
339 | return 0; | |
340 | } | |
341 | ||
342 | static int dhcp_lease_renew(sd_dhcp_client *client, Link *link) { | |
343 | sd_dhcp_lease *lease; | |
344 | struct in_addr address; | |
345 | struct in_addr netmask; | |
346 | uint32_t lifetime = CACHE_INFO_INFINITY_LIFE_TIME; | |
347 | int r; | |
348 | ||
349 | assert(link); | |
350 | assert(client); | |
351 | assert(link->network); | |
352 | ||
353 | r = sd_dhcp_client_get_lease(client, &lease); | |
354 | if (r < 0) { | |
79008bdd | 355 | log_link_warning(link, "DHCP error: no lease %s", |
3c9b8860 TG |
356 | strerror(-r)); |
357 | return r; | |
358 | } | |
359 | ||
360 | sd_dhcp_lease_unref(link->dhcp_lease); | |
361 | link->dhcp4_configured = false; | |
362 | link->dhcp_lease = lease; | |
363 | ||
364 | r = sd_dhcp_lease_get_address(lease, &address); | |
365 | if (r < 0) { | |
79008bdd | 366 | log_link_warning(link, "DHCP error: no address: %s", |
3c9b8860 TG |
367 | strerror(-r)); |
368 | return r; | |
369 | } | |
370 | ||
371 | r = sd_dhcp_lease_get_netmask(lease, &netmask); | |
372 | if (r < 0) { | |
79008bdd | 373 | log_link_warning(link, "DHCP error: no netmask: %s", |
3c9b8860 TG |
374 | strerror(-r)); |
375 | return r; | |
376 | } | |
377 | ||
378 | if (!link->network->dhcp_critical) { | |
379 | r = sd_dhcp_lease_get_lifetime(link->dhcp_lease, | |
380 | &lifetime); | |
381 | if (r < 0) { | |
79008bdd | 382 | log_link_warning(link, |
3c9b8860 TG |
383 | "DHCP error: no lifetime: %s", |
384 | strerror(-r)); | |
385 | return r; | |
386 | } | |
387 | } | |
388 | ||
389 | r = dhcp4_update_address(link, &address, &netmask, lifetime); | |
390 | if (r < 0) { | |
79008bdd | 391 | log_link_warning(link, "could not update IP address: %s", |
3c9b8860 TG |
392 | strerror(-r)); |
393 | link_enter_failed(link); | |
394 | return r; | |
395 | } | |
396 | ||
397 | return 0; | |
398 | } | |
399 | ||
400 | static int dhcp_lease_acquired(sd_dhcp_client *client, Link *link) { | |
401 | sd_dhcp_lease *lease; | |
402 | struct in_addr address; | |
403 | struct in_addr netmask; | |
404 | struct in_addr gateway; | |
405 | unsigned prefixlen; | |
406 | uint32_t lifetime = CACHE_INFO_INFINITY_LIFE_TIME; | |
407 | int r; | |
408 | ||
409 | assert(client); | |
410 | assert(link); | |
411 | ||
412 | r = sd_dhcp_client_get_lease(client, &lease); | |
f2341e0a LP |
413 | if (r < 0) |
414 | return log_link_error_errno(link, r, "DHCP error: no lease: %m"); | |
3c9b8860 TG |
415 | |
416 | r = sd_dhcp_lease_get_address(lease, &address); | |
f2341e0a LP |
417 | if (r < 0) |
418 | return log_link_error_errno(link, r, "DHCP error: no address: %m"); | |
3c9b8860 TG |
419 | |
420 | r = sd_dhcp_lease_get_netmask(lease, &netmask); | |
f2341e0a LP |
421 | if (r < 0) |
422 | return log_link_error_errno(link, r, "DHCP error: no netmask: %m"); | |
3c9b8860 TG |
423 | |
424 | prefixlen = in_addr_netmask_to_prefixlen(&netmask); | |
425 | ||
426 | r = sd_dhcp_lease_get_router(lease, &gateway); | |
f2341e0a LP |
427 | if (r < 0 && r != -ENOENT) |
428 | return log_link_error_errno(link, r, "DHCP error: could not get gateway: %m"); | |
3c9b8860 TG |
429 | |
430 | if (r >= 0) | |
f2341e0a LP |
431 | log_struct(LOG_INFO, |
432 | LOG_LINK_INTERFACE(link), | |
433 | LOG_LINK_MESSAGE(link, "DHCPv4 address %u.%u.%u.%u/%u via %u.%u.%u.%u", | |
434 | ADDRESS_FMT_VAL(address), | |
435 | prefixlen, | |
436 | ADDRESS_FMT_VAL(gateway)), | |
437 | "ADDRESS=%u.%u.%u.%u", ADDRESS_FMT_VAL(address), | |
438 | "PREFIXLEN=%u", prefixlen, | |
439 | "GATEWAY=%u.%u.%u.%u", ADDRESS_FMT_VAL(gateway), | |
440 | NULL); | |
3c9b8860 | 441 | else |
f2341e0a LP |
442 | log_struct(LOG_INFO, |
443 | LOG_LINK_INTERFACE(link), | |
444 | LOG_LINK_MESSAGE(link, "DHCPv4 address %u.%u.%u.%u/%u", | |
445 | ADDRESS_FMT_VAL(address), | |
446 | prefixlen), | |
447 | "ADDRESS=%u.%u.%u.%u", ADDRESS_FMT_VAL(address), | |
448 | "PREFIXLEN=%u", prefixlen, | |
449 | NULL); | |
3c9b8860 TG |
450 | |
451 | link->dhcp_lease = lease; | |
452 | ||
453 | if (link->network->dhcp_mtu) { | |
454 | uint16_t mtu; | |
455 | ||
456 | r = sd_dhcp_lease_get_mtu(lease, &mtu); | |
457 | if (r >= 0) { | |
458 | r = link_set_mtu(link, mtu); | |
459 | if (r < 0) | |
f2341e0a | 460 | log_link_error_errno(link, r, "Failed to set MTU to %" PRIu16 ": %m", mtu); |
3c9b8860 TG |
461 | } |
462 | } | |
463 | ||
464 | if (link->network->dhcp_hostname) { | |
465 | const char *hostname; | |
466 | ||
467 | r = sd_dhcp_lease_get_hostname(lease, &hostname); | |
468 | if (r >= 0) { | |
469 | r = link_set_hostname(link, hostname); | |
470 | if (r < 0) | |
f2341e0a | 471 | log_link_error_errno(link, r, "Failed to set transient hostname to '%s': %m", hostname); |
3c9b8860 TG |
472 | } |
473 | } | |
474 | ||
475 | if (!link->network->dhcp_critical) { | |
f2341e0a | 476 | r = sd_dhcp_lease_get_lifetime(link->dhcp_lease, &lifetime); |
3c9b8860 | 477 | if (r < 0) { |
f2341e0a | 478 | log_link_warning_errno(link, r, "DHCP error: no lifetime: %m"); |
3c9b8860 TG |
479 | return r; |
480 | } | |
481 | } | |
482 | ||
483 | r = dhcp4_update_address(link, &address, &netmask, lifetime); | |
484 | if (r < 0) { | |
f2341e0a | 485 | log_link_warning_errno(link, r, "Could not update IP address: %m"); |
3c9b8860 TG |
486 | link_enter_failed(link); |
487 | return r; | |
488 | } | |
489 | ||
490 | return 0; | |
491 | } | |
492 | static void dhcp4_handler(sd_dhcp_client *client, int event, void *userdata) { | |
493 | Link *link = userdata; | |
494 | int r = 0; | |
495 | ||
496 | assert(link); | |
497 | assert(link->network); | |
498 | assert(link->manager); | |
499 | ||
500 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
501 | return; | |
502 | ||
503 | switch (event) { | |
504 | case DHCP_EVENT_EXPIRED: | |
505 | case DHCP_EVENT_STOP: | |
506 | case DHCP_EVENT_IP_CHANGE: | |
507 | if (link->network->dhcp_critical) { | |
79008bdd | 508 | log_link_error(link, |
3c9b8860 TG |
509 | "DHCPv4 connection considered system critical, ignoring request to reconfigure it."); |
510 | return; | |
511 | } | |
512 | ||
513 | if (link->dhcp_lease) { | |
514 | r = dhcp_lease_lost(link); | |
515 | if (r < 0) { | |
516 | link_enter_failed(link); | |
517 | return; | |
518 | } | |
519 | } | |
520 | ||
521 | if (event == DHCP_EVENT_IP_CHANGE) { | |
522 | r = dhcp_lease_acquired(client, link); | |
523 | if (r < 0) { | |
524 | link_enter_failed(link); | |
525 | return; | |
526 | } | |
527 | } | |
528 | ||
529 | break; | |
530 | case DHCP_EVENT_RENEW: | |
531 | r = dhcp_lease_renew(client, link); | |
532 | if (r < 0) { | |
533 | link_enter_failed(link); | |
534 | return; | |
535 | } | |
536 | break; | |
537 | case DHCP_EVENT_IP_ACQUIRE: | |
538 | r = dhcp_lease_acquired(client, link); | |
539 | if (r < 0) { | |
540 | link_enter_failed(link); | |
541 | return; | |
542 | } | |
543 | break; | |
544 | default: | |
545 | if (event < 0) | |
79008bdd | 546 | log_link_warning(link, |
3c9b8860 TG |
547 | "DHCP error: client failed: %s", |
548 | strerror(-event)); | |
549 | else | |
79008bdd | 550 | log_link_warning(link, |
3c9b8860 TG |
551 | "DHCP unknown event: %d", |
552 | event); | |
553 | break; | |
554 | } | |
555 | ||
556 | return; | |
557 | } | |
558 | ||
559 | int dhcp4_configure(Link *link) { | |
560 | int r; | |
561 | ||
562 | assert(link); | |
563 | assert(link->network); | |
cb9fc36a | 564 | assert(IN_SET(link->network->dhcp, ADDRESS_FAMILY_YES, ADDRESS_FAMILY_IPV4)); |
3c9b8860 TG |
565 | |
566 | r = sd_dhcp_client_new(&link->dhcp_client); | |
567 | if (r < 0) | |
568 | return r; | |
569 | ||
570 | r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0); | |
571 | if (r < 0) | |
572 | return r; | |
573 | ||
76253e73 DW |
574 | r = sd_dhcp_client_set_mac(link->dhcp_client, |
575 | (const uint8_t *) &link->mac, | |
576 | sizeof (link->mac), ARPHRD_ETHER); | |
3c9b8860 TG |
577 | if (r < 0) |
578 | return r; | |
579 | ||
580 | r = sd_dhcp_client_set_index(link->dhcp_client, link->ifindex); | |
581 | if (r < 0) | |
582 | return r; | |
583 | ||
584 | r = sd_dhcp_client_set_callback(link->dhcp_client, dhcp4_handler, link); | |
585 | if (r < 0) | |
586 | return r; | |
587 | ||
588 | r = sd_dhcp_client_set_request_broadcast(link->dhcp_client, | |
589 | link->network->dhcp_broadcast); | |
590 | if (r < 0) | |
591 | return r; | |
592 | ||
593 | if (link->mtu) { | |
594 | r = sd_dhcp_client_set_mtu(link->dhcp_client, link->mtu); | |
595 | if (r < 0) | |
596 | return r; | |
597 | } | |
598 | ||
599 | if (link->network->dhcp_mtu) { | |
600 | r = sd_dhcp_client_set_request_option(link->dhcp_client, | |
601 | DHCP_OPTION_INTERFACE_MTU); | |
602 | if (r < 0) | |
603 | return r; | |
604 | } | |
605 | ||
606 | if (link->network->dhcp_routes) { | |
607 | r = sd_dhcp_client_set_request_option(link->dhcp_client, | |
608 | DHCP_OPTION_STATIC_ROUTE); | |
609 | if (r < 0) | |
610 | return r; | |
611 | r = sd_dhcp_client_set_request_option(link->dhcp_client, | |
612 | DHCP_OPTION_CLASSLESS_STATIC_ROUTE); | |
613 | if (r < 0) | |
614 | return r; | |
615 | } | |
616 | ||
617 | if (link->network->dhcp_sendhost) { | |
618 | _cleanup_free_ char *hostname = NULL; | |
619 | ||
620 | hostname = gethostname_malloc(); | |
621 | if (!hostname) | |
622 | return -ENOMEM; | |
623 | ||
624 | if (!is_localhost(hostname)) { | |
625 | r = sd_dhcp_client_set_hostname(link->dhcp_client, | |
626 | hostname); | |
627 | if (r < 0) | |
628 | return r; | |
629 | } | |
630 | } | |
631 | ||
632 | if (link->network->dhcp_vendor_class_identifier) { | |
633 | r = sd_dhcp_client_set_vendor_class_identifier(link->dhcp_client, | |
634 | link->network->dhcp_vendor_class_identifier); | |
635 | if (r < 0) | |
636 | return r; | |
637 | } | |
638 | ||
3e43b2cd JJ |
639 | switch (link->network->dhcp_client_identifier) { |
640 | case DHCP_CLIENT_ID_DUID: | |
641 | /* Library defaults to this. */ | |
642 | break; | |
643 | case DHCP_CLIENT_ID_MAC: | |
644 | r = sd_dhcp_client_set_client_id(link->dhcp_client, | |
645 | ARPHRD_ETHER, | |
646 | (const uint8_t *) &link->mac, | |
647 | sizeof (link->mac)); | |
648 | if (r < 0) | |
649 | return r; | |
650 | break; | |
651 | default: | |
652 | assert_not_reached("Unknown client identifier type."); | |
653 | } | |
654 | ||
3c9b8860 TG |
655 | return 0; |
656 | } |