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Commit | Line | Data |
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3c9b8860 TG |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2013-2014 Tom Gundersen <teg@jklm.no> | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU Lesser General Public License as published by | |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public License | |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
18 | ***/ | |
19 | ||
20 | #include <netinet/ether.h> | |
21 | #include <linux/if.h> | |
22 | ||
b5efdb8a LP |
23 | #include "alloc-util.h" |
24 | #include "dhcp-lease-internal.h" | |
958b66ea | 25 | #include "hostname-util.h" |
fc1ba79d | 26 | #include "netdev/vrf.h" |
3c9b8860 | 27 | #include "network-internal.h" |
23f53b99 TG |
28 | #include "networkd-link.h" |
29 | #include "networkd-manager.h" | |
30 | #include "networkd-network.h" | |
3c9b8860 | 31 | |
1c4baffc | 32 | static int dhcp4_route_handler(sd_netlink *rtnl, sd_netlink_message *m, |
3c9b8860 TG |
33 | void *userdata) { |
34 | _cleanup_link_unref_ Link *link = userdata; | |
35 | int r; | |
36 | ||
37 | assert(link); | |
6cf4a01c | 38 | assert(link->dhcp4_messages > 0); |
3c9b8860 | 39 | |
313cefa1 | 40 | link->dhcp4_messages--; |
3c9b8860 | 41 | |
1c4baffc | 42 | r = sd_netlink_message_get_errno(m); |
3c9b8860 | 43 | if (r < 0 && r != -EEXIST) { |
f6b8196f | 44 | log_link_error_errno(link, r, "Could not set DHCPv4 route: %m"); |
3c9b8860 TG |
45 | link_enter_failed(link); |
46 | } | |
47 | ||
6cf4a01c | 48 | if (link->dhcp4_messages == 0) { |
3c9b8860 | 49 | link->dhcp4_configured = true; |
8012cd39 | 50 | link_check_ready(link); |
3c9b8860 TG |
51 | } |
52 | ||
53 | return 1; | |
54 | } | |
55 | ||
d6eac9bd DW |
56 | static int route_scope_from_address(const Route *route, const struct in_addr *self_addr) { |
57 | assert(route); | |
58 | assert(self_addr); | |
59 | ||
60 | if (in_addr_is_localhost(AF_INET, &route->dst) || | |
61 | (self_addr->s_addr && route->dst.in.s_addr == self_addr->s_addr)) | |
62 | return RT_SCOPE_HOST; | |
63 | else if (in4_addr_is_null(&route->gw.in)) | |
64 | return RT_SCOPE_LINK; | |
65 | else | |
66 | return RT_SCOPE_UNIVERSE; | |
67 | } | |
68 | ||
3c9b8860 | 69 | static int link_set_dhcp_routes(Link *link) { |
d6eac9bd | 70 | struct in_addr gateway, address; |
f8693fc7 | 71 | _cleanup_free_ sd_dhcp_route **static_routes = NULL; |
3c9b8860 | 72 | int r, n, i; |
fc1ba79d | 73 | uint32_t table; |
3c9b8860 TG |
74 | |
75 | assert(link); | |
0c9b15a3 AJ |
76 | |
77 | if (!link->dhcp_lease) /* link went down while we configured the IP addresses? */ | |
78 | return 0; | |
79 | ||
80 | if (!link->network) /* link went down while we configured the IP addresses? */ | |
81 | return 0; | |
964b26fe SS |
82 | |
83 | if (!link->network->dhcp_use_routes) | |
84 | return 0; | |
3c9b8860 | 85 | |
fc1ba79d AR |
86 | /* When the interface is part of an VRF use the VRFs routing table, unless |
87 | * there is a another table specified. */ | |
88 | table = link->network->dhcp_route_table; | |
89 | if (!link->network->dhcp_route_table_set && link->network->vrf != NULL) | |
90 | table = VRF(link->network->vrf)->table; | |
91 | ||
b23aec0d DW |
92 | r = sd_dhcp_lease_get_address(link->dhcp_lease, &address); |
93 | if (r < 0) | |
94 | return log_link_warning_errno(link, r, "DHCP error: could not get address: %m"); | |
95 | ||
3c9b8860 | 96 | r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway); |
397d15fd | 97 | if (r < 0 && r != -ENODATA) |
f6b8196f LP |
98 | return log_link_warning_errno(link, r, "DHCP error: could not get gateway: %m"); |
99 | ||
3c9b8860 TG |
100 | if (r >= 0) { |
101 | _cleanup_route_free_ Route *route = NULL; | |
102 | _cleanup_route_free_ Route *route_gw = NULL; | |
103 | ||
ed9e361a | 104 | r = route_new(&route); |
f6b8196f LP |
105 | if (r < 0) |
106 | return log_link_error_errno(link, r, "Could not allocate route: %m"); | |
3c9b8860 | 107 | |
ed9e361a TG |
108 | route->protocol = RTPROT_DHCP; |
109 | ||
110 | r = route_new(&route_gw); | |
f6b8196f LP |
111 | if (r < 0) |
112 | return log_link_error_errno(link, r, "Could not allocate route: %m"); | |
3c9b8860 TG |
113 | |
114 | /* The dhcp netmask may mask out the gateway. Add an explicit | |
115 | * route for the gw host so that we can route no matter the | |
116 | * netmask or existing kernel route tables. */ | |
117 | route_gw->family = AF_INET; | |
2ce40956 | 118 | route_gw->dst.in = gateway; |
3c9b8860 | 119 | route_gw->dst_prefixlen = 32; |
2ce40956 | 120 | route_gw->prefsrc.in = address; |
3c9b8860 | 121 | route_gw->scope = RT_SCOPE_LINK; |
ed9e361a | 122 | route_gw->protocol = RTPROT_DHCP; |
86655331 | 123 | route_gw->priority = link->network->dhcp_route_metric; |
fc1ba79d | 124 | route_gw->table = table; |
3c9b8860 | 125 | |
483d099e | 126 | r = route_configure(route_gw, link, dhcp4_route_handler); |
f6b8196f LP |
127 | if (r < 0) |
128 | return log_link_warning_errno(link, r, "Could not set host route: %m"); | |
3c9b8860 | 129 | |
313cefa1 | 130 | link->dhcp4_messages++; |
3c9b8860 TG |
131 | |
132 | route->family = AF_INET; | |
2ce40956 TG |
133 | route->gw.in = gateway; |
134 | route->prefsrc.in = address; | |
86655331 | 135 | route->priority = link->network->dhcp_route_metric; |
fc1ba79d | 136 | route->table = table; |
3c9b8860 | 137 | |
483d099e | 138 | r = route_configure(route, link, dhcp4_route_handler); |
3c9b8860 | 139 | if (r < 0) { |
f6b8196f | 140 | log_link_warning_errno(link, r, "Could not set routes: %m"); |
3c9b8860 TG |
141 | link_enter_failed(link); |
142 | return r; | |
143 | } | |
144 | ||
313cefa1 | 145 | link->dhcp4_messages++; |
3c9b8860 TG |
146 | } |
147 | ||
148 | n = sd_dhcp_lease_get_routes(link->dhcp_lease, &static_routes); | |
397d15fd | 149 | if (n == -ENODATA) |
3c9b8860 | 150 | return 0; |
f6b8196f LP |
151 | if (n < 0) |
152 | return log_link_warning_errno(link, n, "DHCP error: could not get routes: %m"); | |
3c9b8860 TG |
153 | |
154 | for (i = 0; i < n; i++) { | |
155 | _cleanup_route_free_ Route *route = NULL; | |
156 | ||
ed9e361a | 157 | r = route_new(&route); |
f6b8196f LP |
158 | if (r < 0) |
159 | return log_link_error_errno(link, r, "Could not allocate route: %m"); | |
3c9b8860 TG |
160 | |
161 | route->family = AF_INET; | |
ed9e361a | 162 | route->protocol = RTPROT_DHCP; |
f8693fc7 BG |
163 | assert_se(sd_dhcp_route_get_gateway(static_routes[i], &route->gw.in) >= 0); |
164 | assert_se(sd_dhcp_route_get_destination(static_routes[i], &route->dst.in) >= 0); | |
165 | assert_se(sd_dhcp_route_get_destination_prefix_length(static_routes[i], &route->dst_prefixlen) >= 0); | |
86655331 | 166 | route->priority = link->network->dhcp_route_metric; |
fc1ba79d | 167 | route->table = table; |
d6eac9bd | 168 | route->scope = route_scope_from_address(route, &address); |
3c9b8860 | 169 | |
483d099e | 170 | r = route_configure(route, link, dhcp4_route_handler); |
f6b8196f LP |
171 | if (r < 0) |
172 | return log_link_warning_errno(link, r, "Could not set host route: %m"); | |
3c9b8860 | 173 | |
313cefa1 | 174 | link->dhcp4_messages++; |
3c9b8860 TG |
175 | } |
176 | ||
177 | return 0; | |
178 | } | |
179 | ||
180 | static int dhcp_lease_lost(Link *link) { | |
181 | _cleanup_address_free_ Address *address = NULL; | |
182 | struct in_addr addr; | |
183 | struct in_addr netmask; | |
184 | struct in_addr gateway; | |
f414a269 | 185 | unsigned prefixlen = 0; |
3c9b8860 TG |
186 | int r; |
187 | ||
188 | assert(link); | |
189 | assert(link->dhcp_lease); | |
190 | ||
79008bdd | 191 | log_link_warning(link, "DHCP lease lost"); |
3c9b8860 | 192 | |
27cb34f5 | 193 | if (link->network->dhcp_use_routes) { |
f8693fc7 | 194 | _cleanup_free_ sd_dhcp_route **routes = NULL; |
3c9b8860 TG |
195 | int n, i; |
196 | ||
197 | n = sd_dhcp_lease_get_routes(link->dhcp_lease, &routes); | |
198 | if (n >= 0) { | |
199 | for (i = 0; i < n; i++) { | |
200 | _cleanup_route_free_ Route *route = NULL; | |
201 | ||
ed9e361a | 202 | r = route_new(&route); |
3c9b8860 TG |
203 | if (r >= 0) { |
204 | route->family = AF_INET; | |
f8693fc7 BG |
205 | assert_se(sd_dhcp_route_get_gateway(routes[i], &route->gw.in) >= 0); |
206 | assert_se(sd_dhcp_route_get_destination(routes[i], &route->dst.in) >= 0); | |
207 | assert_se(sd_dhcp_route_get_destination_prefix_length(routes[i], &route->dst_prefixlen) >= 0); | |
3c9b8860 | 208 | |
91b5f997 | 209 | route_remove(route, link, |
483d099e | 210 | link_route_remove_handler); |
3c9b8860 TG |
211 | } |
212 | } | |
213 | } | |
214 | } | |
215 | ||
f0213e37 | 216 | r = address_new(&address); |
3c9b8860 TG |
217 | if (r >= 0) { |
218 | r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway); | |
219 | if (r >= 0) { | |
220 | _cleanup_route_free_ Route *route_gw = NULL; | |
221 | _cleanup_route_free_ Route *route = NULL; | |
222 | ||
ed9e361a | 223 | r = route_new(&route_gw); |
3c9b8860 TG |
224 | if (r >= 0) { |
225 | route_gw->family = AF_INET; | |
2ce40956 | 226 | route_gw->dst.in = gateway; |
3c9b8860 TG |
227 | route_gw->dst_prefixlen = 32; |
228 | route_gw->scope = RT_SCOPE_LINK; | |
229 | ||
91b5f997 | 230 | route_remove(route_gw, link, |
483d099e | 231 | link_route_remove_handler); |
3c9b8860 TG |
232 | } |
233 | ||
ed9e361a | 234 | r = route_new(&route); |
3c9b8860 TG |
235 | if (r >= 0) { |
236 | route->family = AF_INET; | |
2ce40956 | 237 | route->gw.in = gateway; |
3c9b8860 | 238 | |
91b5f997 | 239 | route_remove(route, link, |
483d099e | 240 | link_route_remove_handler); |
3c9b8860 TG |
241 | } |
242 | } | |
243 | ||
f414a269 TG |
244 | r = sd_dhcp_lease_get_address(link->dhcp_lease, &addr); |
245 | if (r >= 0) { | |
246 | r = sd_dhcp_lease_get_netmask(link->dhcp_lease, &netmask); | |
247 | if (r >= 0) | |
248 | prefixlen = in_addr_netmask_to_prefixlen(&netmask); | |
3c9b8860 | 249 | |
f414a269 TG |
250 | address->family = AF_INET; |
251 | address->in_addr.in = addr; | |
252 | address->prefixlen = prefixlen; | |
3c9b8860 | 253 | |
483d099e | 254 | address_remove(address, link, link_address_remove_handler); |
f414a269 | 255 | } |
3c9b8860 TG |
256 | } |
257 | ||
27cb34f5 | 258 | if (link->network->dhcp_use_mtu) { |
3c9b8860 TG |
259 | uint16_t mtu; |
260 | ||
261 | r = sd_dhcp_lease_get_mtu(link->dhcp_lease, &mtu); | |
262 | if (r >= 0 && link->original_mtu != mtu) { | |
263 | r = link_set_mtu(link, link->original_mtu); | |
264 | if (r < 0) { | |
79008bdd | 265 | log_link_warning(link, |
3c9b8860 TG |
266 | "DHCP error: could not reset MTU"); |
267 | link_enter_failed(link); | |
268 | return r; | |
269 | } | |
270 | } | |
271 | } | |
272 | ||
27cb34f5 | 273 | if (link->network->dhcp_use_hostname) { |
3c9b8860 TG |
274 | const char *hostname = NULL; |
275 | ||
27cb34f5 LP |
276 | if (link->network->dhcp_hostname) |
277 | hostname = link->network->dhcp_hostname; | |
dce391e7 LP |
278 | else |
279 | (void) sd_dhcp_lease_get_hostname(link->dhcp_lease, &hostname); | |
a7d0ef44 | 280 | |
dce391e7 LP |
281 | if (hostname) { |
282 | /* If a hostname was set due to the lease, then unset it now. */ | |
59eb33e0 | 283 | r = manager_set_hostname(link->manager, NULL); |
3c9b8860 | 284 | if (r < 0) |
dce391e7 | 285 | log_link_warning_errno(link, r, "Failed to reset transient hostname: %m"); |
3c9b8860 TG |
286 | } |
287 | } | |
288 | ||
289 | link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease); | |
6a3e5f6a | 290 | link_dirty(link); |
3c9b8860 TG |
291 | link->dhcp4_configured = false; |
292 | ||
293 | return 0; | |
294 | } | |
295 | ||
1c4baffc | 296 | static int dhcp4_address_handler(sd_netlink *rtnl, sd_netlink_message *m, |
3c9b8860 TG |
297 | void *userdata) { |
298 | _cleanup_link_unref_ Link *link = userdata; | |
299 | int r; | |
300 | ||
301 | assert(link); | |
302 | ||
1c4baffc | 303 | r = sd_netlink_message_get_errno(m); |
3c9b8860 | 304 | if (r < 0 && r != -EEXIST) { |
f6b8196f | 305 | log_link_error_errno(link, r, "Could not set DHCPv4 address: %m"); |
3c9b8860 | 306 | link_enter_failed(link); |
45af44d4 | 307 | } else if (r >= 0) |
200a0868 | 308 | manager_rtnl_process_address(rtnl, m, link->manager); |
3c9b8860 TG |
309 | |
310 | link_set_dhcp_routes(link); | |
311 | ||
312 | return 1; | |
313 | } | |
314 | ||
315 | static int dhcp4_update_address(Link *link, | |
316 | struct in_addr *address, | |
317 | struct in_addr *netmask, | |
318 | uint32_t lifetime) { | |
319 | _cleanup_address_free_ Address *addr = NULL; | |
320 | unsigned prefixlen; | |
321 | int r; | |
322 | ||
323 | assert(address); | |
324 | assert(netmask); | |
325 | assert(lifetime); | |
326 | ||
327 | prefixlen = in_addr_netmask_to_prefixlen(netmask); | |
328 | ||
f0213e37 | 329 | r = address_new(&addr); |
3c9b8860 TG |
330 | if (r < 0) |
331 | return r; | |
332 | ||
333 | addr->family = AF_INET; | |
334 | addr->in_addr.in.s_addr = address->s_addr; | |
335 | addr->cinfo.ifa_prefered = lifetime; | |
336 | addr->cinfo.ifa_valid = lifetime; | |
337 | addr->prefixlen = prefixlen; | |
338 | addr->broadcast.s_addr = address->s_addr | ~netmask->s_addr; | |
339 | ||
66669078 TG |
340 | /* allow reusing an existing address and simply update its lifetime |
341 | * in case it already exists */ | |
483d099e | 342 | r = address_configure(addr, link, dhcp4_address_handler, true); |
3c9b8860 TG |
343 | if (r < 0) |
344 | return r; | |
345 | ||
346 | return 0; | |
347 | } | |
348 | ||
349 | static int dhcp_lease_renew(sd_dhcp_client *client, Link *link) { | |
350 | sd_dhcp_lease *lease; | |
351 | struct in_addr address; | |
352 | struct in_addr netmask; | |
353 | uint32_t lifetime = CACHE_INFO_INFINITY_LIFE_TIME; | |
354 | int r; | |
355 | ||
356 | assert(link); | |
357 | assert(client); | |
358 | assert(link->network); | |
359 | ||
360 | r = sd_dhcp_client_get_lease(client, &lease); | |
f6b8196f LP |
361 | if (r < 0) |
362 | return log_link_warning_errno(link, r, "DHCP error: no lease: %m"); | |
3c9b8860 TG |
363 | |
364 | sd_dhcp_lease_unref(link->dhcp_lease); | |
365 | link->dhcp4_configured = false; | |
e6b18ffa | 366 | link->dhcp_lease = sd_dhcp_lease_ref(lease); |
6a3e5f6a | 367 | link_dirty(link); |
3c9b8860 TG |
368 | |
369 | r = sd_dhcp_lease_get_address(lease, &address); | |
f6b8196f LP |
370 | if (r < 0) |
371 | return log_link_warning_errno(link, r, "DHCP error: no address: %m"); | |
3c9b8860 TG |
372 | |
373 | r = sd_dhcp_lease_get_netmask(lease, &netmask); | |
f6b8196f LP |
374 | if (r < 0) |
375 | return log_link_warning_errno(link, r, "DHCP error: no netmask: %m"); | |
3c9b8860 TG |
376 | |
377 | if (!link->network->dhcp_critical) { | |
f6b8196f LP |
378 | r = sd_dhcp_lease_get_lifetime(link->dhcp_lease, &lifetime); |
379 | if (r < 0) | |
380 | return log_link_warning_errno(link, r, "DHCP error: no lifetime: %m"); | |
3c9b8860 TG |
381 | } |
382 | ||
383 | r = dhcp4_update_address(link, &address, &netmask, lifetime); | |
384 | if (r < 0) { | |
f6b8196f | 385 | log_link_warning_errno(link, r, "Could not update IP address: %m"); |
3c9b8860 TG |
386 | link_enter_failed(link); |
387 | return r; | |
388 | } | |
389 | ||
390 | return 0; | |
391 | } | |
392 | ||
393 | static int dhcp_lease_acquired(sd_dhcp_client *client, Link *link) { | |
394 | sd_dhcp_lease *lease; | |
395 | struct in_addr address; | |
396 | struct in_addr netmask; | |
397 | struct in_addr gateway; | |
398 | unsigned prefixlen; | |
399 | uint32_t lifetime = CACHE_INFO_INFINITY_LIFE_TIME; | |
400 | int r; | |
401 | ||
402 | assert(client); | |
403 | assert(link); | |
404 | ||
405 | r = sd_dhcp_client_get_lease(client, &lease); | |
f2341e0a | 406 | if (r < 0) |
f6b8196f | 407 | return log_link_error_errno(link, r, "DHCP error: No lease: %m"); |
3c9b8860 TG |
408 | |
409 | r = sd_dhcp_lease_get_address(lease, &address); | |
f2341e0a | 410 | if (r < 0) |
f6b8196f | 411 | return log_link_error_errno(link, r, "DHCP error: No address: %m"); |
3c9b8860 TG |
412 | |
413 | r = sd_dhcp_lease_get_netmask(lease, &netmask); | |
f2341e0a | 414 | if (r < 0) |
f6b8196f | 415 | return log_link_error_errno(link, r, "DHCP error: No netmask: %m"); |
3c9b8860 TG |
416 | |
417 | prefixlen = in_addr_netmask_to_prefixlen(&netmask); | |
418 | ||
419 | r = sd_dhcp_lease_get_router(lease, &gateway); | |
397d15fd | 420 | if (r < 0 && r != -ENODATA) |
f6b8196f | 421 | return log_link_error_errno(link, r, "DHCP error: Could not get gateway: %m"); |
3c9b8860 TG |
422 | |
423 | if (r >= 0) | |
f2341e0a LP |
424 | log_struct(LOG_INFO, |
425 | LOG_LINK_INTERFACE(link), | |
426 | LOG_LINK_MESSAGE(link, "DHCPv4 address %u.%u.%u.%u/%u via %u.%u.%u.%u", | |
427 | ADDRESS_FMT_VAL(address), | |
428 | prefixlen, | |
429 | ADDRESS_FMT_VAL(gateway)), | |
430 | "ADDRESS=%u.%u.%u.%u", ADDRESS_FMT_VAL(address), | |
431 | "PREFIXLEN=%u", prefixlen, | |
432 | "GATEWAY=%u.%u.%u.%u", ADDRESS_FMT_VAL(gateway), | |
433 | NULL); | |
3c9b8860 | 434 | else |
f2341e0a LP |
435 | log_struct(LOG_INFO, |
436 | LOG_LINK_INTERFACE(link), | |
437 | LOG_LINK_MESSAGE(link, "DHCPv4 address %u.%u.%u.%u/%u", | |
438 | ADDRESS_FMT_VAL(address), | |
439 | prefixlen), | |
440 | "ADDRESS=%u.%u.%u.%u", ADDRESS_FMT_VAL(address), | |
441 | "PREFIXLEN=%u", prefixlen, | |
442 | NULL); | |
3c9b8860 | 443 | |
e6b18ffa | 444 | link->dhcp_lease = sd_dhcp_lease_ref(lease); |
6a3e5f6a | 445 | link_dirty(link); |
3c9b8860 | 446 | |
27cb34f5 | 447 | if (link->network->dhcp_use_mtu) { |
3c9b8860 TG |
448 | uint16_t mtu; |
449 | ||
450 | r = sd_dhcp_lease_get_mtu(lease, &mtu); | |
451 | if (r >= 0) { | |
452 | r = link_set_mtu(link, mtu); | |
453 | if (r < 0) | |
f2341e0a | 454 | log_link_error_errno(link, r, "Failed to set MTU to %" PRIu16 ": %m", mtu); |
3c9b8860 TG |
455 | } |
456 | } | |
457 | ||
27cb34f5 | 458 | if (link->network->dhcp_use_hostname) { |
49f6e11e | 459 | const char *hostname = NULL; |
3c9b8860 | 460 | |
27cb34f5 LP |
461 | if (link->network->dhcp_hostname) |
462 | hostname = link->network->dhcp_hostname; | |
dce391e7 LP |
463 | else |
464 | (void) sd_dhcp_lease_get_hostname(lease, &hostname); | |
a7d0ef44 | 465 | |
dce391e7 | 466 | if (hostname) { |
59eb33e0 | 467 | r = manager_set_hostname(link->manager, hostname); |
3c9b8860 | 468 | if (r < 0) |
f2341e0a | 469 | log_link_error_errno(link, r, "Failed to set transient hostname to '%s': %m", hostname); |
3c9b8860 TG |
470 | } |
471 | } | |
472 | ||
27cb34f5 | 473 | if (link->network->dhcp_use_timezone) { |
21b80ad1 LP |
474 | const char *tz = NULL; |
475 | ||
476 | (void) sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz); | |
477 | ||
478 | if (tz) { | |
59eb33e0 | 479 | r = manager_set_timezone(link->manager, tz); |
21b80ad1 LP |
480 | if (r < 0) |
481 | log_link_error_errno(link, r, "Failed to set timezone to '%s': %m", tz); | |
482 | } | |
483 | } | |
484 | ||
3c9b8860 | 485 | if (!link->network->dhcp_critical) { |
f2341e0a | 486 | r = sd_dhcp_lease_get_lifetime(link->dhcp_lease, &lifetime); |
3c9b8860 | 487 | if (r < 0) { |
f2341e0a | 488 | log_link_warning_errno(link, r, "DHCP error: no lifetime: %m"); |
3c9b8860 TG |
489 | return r; |
490 | } | |
491 | } | |
492 | ||
493 | r = dhcp4_update_address(link, &address, &netmask, lifetime); | |
494 | if (r < 0) { | |
f2341e0a | 495 | log_link_warning_errno(link, r, "Could not update IP address: %m"); |
3c9b8860 TG |
496 | link_enter_failed(link); |
497 | return r; | |
498 | } | |
499 | ||
500 | return 0; | |
501 | } | |
502 | static void dhcp4_handler(sd_dhcp_client *client, int event, void *userdata) { | |
503 | Link *link = userdata; | |
504 | int r = 0; | |
505 | ||
506 | assert(link); | |
507 | assert(link->network); | |
508 | assert(link->manager); | |
509 | ||
510 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
511 | return; | |
512 | ||
513 | switch (event) { | |
03748142 DH |
514 | case SD_DHCP_CLIENT_EVENT_EXPIRED: |
515 | case SD_DHCP_CLIENT_EVENT_STOP: | |
516 | case SD_DHCP_CLIENT_EVENT_IP_CHANGE: | |
3c9b8860 | 517 | if (link->network->dhcp_critical) { |
f6b8196f | 518 | log_link_error(link, "DHCPv4 connection considered system critical, ignoring request to reconfigure it."); |
3c9b8860 TG |
519 | return; |
520 | } | |
521 | ||
522 | if (link->dhcp_lease) { | |
523 | r = dhcp_lease_lost(link); | |
524 | if (r < 0) { | |
525 | link_enter_failed(link); | |
526 | return; | |
527 | } | |
528 | } | |
529 | ||
03748142 | 530 | if (event == SD_DHCP_CLIENT_EVENT_IP_CHANGE) { |
3c9b8860 TG |
531 | r = dhcp_lease_acquired(client, link); |
532 | if (r < 0) { | |
533 | link_enter_failed(link); | |
534 | return; | |
535 | } | |
536 | } | |
537 | ||
538 | break; | |
03748142 | 539 | case SD_DHCP_CLIENT_EVENT_RENEW: |
3c9b8860 TG |
540 | r = dhcp_lease_renew(client, link); |
541 | if (r < 0) { | |
542 | link_enter_failed(link); | |
543 | return; | |
544 | } | |
545 | break; | |
03748142 | 546 | case SD_DHCP_CLIENT_EVENT_IP_ACQUIRE: |
3c9b8860 TG |
547 | r = dhcp_lease_acquired(client, link); |
548 | if (r < 0) { | |
549 | link_enter_failed(link); | |
550 | return; | |
551 | } | |
552 | break; | |
553 | default: | |
554 | if (event < 0) | |
f6b8196f | 555 | log_link_warning_errno(link, event, "DHCP error: Client failed: %m"); |
3c9b8860 | 556 | else |
f6b8196f | 557 | log_link_warning(link, "DHCP unknown event: %i", event); |
3c9b8860 TG |
558 | break; |
559 | } | |
560 | ||
561 | return; | |
562 | } | |
563 | ||
7192bb81 LP |
564 | static int dhcp4_set_hostname(Link *link) { |
565 | _cleanup_free_ char *hostname = NULL; | |
566 | const char *hn; | |
567 | int r; | |
568 | ||
569 | assert(link); | |
570 | ||
571 | if (!link->network->dhcp_send_hostname) | |
572 | hn = NULL; | |
573 | else if (link->network->dhcp_hostname) | |
574 | hn = link->network->dhcp_hostname; | |
575 | else { | |
576 | r = gethostname_strict(&hostname); | |
577 | if (r < 0 && r != -ENXIO) /* ENXIO: no hostname set or hostname is "localhost" */ | |
578 | return r; | |
579 | ||
580 | hn = hostname; | |
581 | } | |
582 | ||
583 | return sd_dhcp_client_set_hostname(link->dhcp_client, hn); | |
584 | } | |
585 | ||
3c9b8860 TG |
586 | int dhcp4_configure(Link *link) { |
587 | int r; | |
588 | ||
589 | assert(link); | |
590 | assert(link->network); | |
e0ee46f2 | 591 | assert(link->network->dhcp & ADDRESS_FAMILY_IPV4); |
3c9b8860 | 592 | |
0bc70f1d | 593 | if (!link->dhcp_client) { |
db3d2358 | 594 | r = sd_dhcp_client_new(&link->dhcp_client, link->network->dhcp_anonymize); |
0bc70f1d TG |
595 | if (r < 0) |
596 | return r; | |
597 | } | |
3c9b8860 TG |
598 | |
599 | r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0); | |
600 | if (r < 0) | |
601 | return r; | |
602 | ||
76253e73 DW |
603 | r = sd_dhcp_client_set_mac(link->dhcp_client, |
604 | (const uint8_t *) &link->mac, | |
605 | sizeof (link->mac), ARPHRD_ETHER); | |
3c9b8860 TG |
606 | if (r < 0) |
607 | return r; | |
608 | ||
2f8e7633 | 609 | r = sd_dhcp_client_set_ifindex(link->dhcp_client, link->ifindex); |
3c9b8860 TG |
610 | if (r < 0) |
611 | return r; | |
612 | ||
613 | r = sd_dhcp_client_set_callback(link->dhcp_client, dhcp4_handler, link); | |
614 | if (r < 0) | |
615 | return r; | |
616 | ||
617 | r = sd_dhcp_client_set_request_broadcast(link->dhcp_client, | |
618 | link->network->dhcp_broadcast); | |
619 | if (r < 0) | |
620 | return r; | |
621 | ||
622 | if (link->mtu) { | |
623 | r = sd_dhcp_client_set_mtu(link->dhcp_client, link->mtu); | |
624 | if (r < 0) | |
625 | return r; | |
626 | } | |
627 | ||
27cb34f5 | 628 | if (link->network->dhcp_use_mtu) { |
39745a5a | 629 | r = sd_dhcp_client_set_request_option(link->dhcp_client, |
22805d92 | 630 | SD_DHCP_OPTION_INTERFACE_MTU); |
39745a5a LP |
631 | if (r < 0) |
632 | return r; | |
3c9b8860 TG |
633 | } |
634 | ||
5e77a146 | 635 | /* NOTE: when using Anonymity Profiles, routes PRL options are sent |
636 | * by default, so they should not be added again here. */ | |
637 | /* NOTE: even if this variable is called "use", it also "sends" PRL | |
638 | * options, maybe there should be a different configuration variable | |
639 | * to send or not route options?. */ | |
640 | if (link->network->dhcp_use_routes && !link->network->dhcp_anonymize) { | |
3c9b8860 | 641 | r = sd_dhcp_client_set_request_option(link->dhcp_client, |
22805d92 | 642 | SD_DHCP_OPTION_STATIC_ROUTE); |
3c9b8860 TG |
643 | if (r < 0) |
644 | return r; | |
645 | r = sd_dhcp_client_set_request_option(link->dhcp_client, | |
22805d92 | 646 | SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE); |
7d6884b6 TA |
647 | if (r < 0) |
648 | return r; | |
3c9b8860 TG |
649 | } |
650 | ||
ead36ce6 | 651 | if (link->network->dhcp_use_ntp) { |
652 | r = sd_dhcp_client_set_request_option(link->dhcp_client, SD_DHCP_OPTION_NTP_SERVER); | |
653 | if (r < 0) | |
654 | return r; | |
655 | } | |
4b7b5abb | 656 | |
89573b37 | 657 | if (link->network->dhcp_use_timezone) { |
658 | r = sd_dhcp_client_set_request_option(link->dhcp_client, SD_DHCP_OPTION_NEW_TZDB_TIMEZONE); | |
659 | if (r < 0) | |
660 | return r; | |
661 | } | |
8eb9058d | 662 | |
7192bb81 LP |
663 | r = dhcp4_set_hostname(link); |
664 | if (r < 0) | |
665 | return r; | |
3c9b8860 TG |
666 | |
667 | if (link->network->dhcp_vendor_class_identifier) { | |
668 | r = sd_dhcp_client_set_vendor_class_identifier(link->dhcp_client, | |
669 | link->network->dhcp_vendor_class_identifier); | |
670 | if (r < 0) | |
671 | return r; | |
672 | } | |
673 | ||
9faed222 SS |
674 | if (link->network->dhcp_client_port) { |
675 | r = sd_dhcp_client_set_client_port(link->dhcp_client, link->network->dhcp_client_port); | |
676 | if (r < 0) | |
677 | return r; | |
678 | } | |
679 | ||
3e43b2cd | 680 | switch (link->network->dhcp_client_identifier) { |
8341a5c3 | 681 | case DHCP_CLIENT_ID_DUID: { |
413708d1 | 682 | /* If configured, apply user specified DUID and/or IAID */ |
8341a5c3 ZJS |
683 | const DUID *duid = link_duid(link); |
684 | ||
685 | r = sd_dhcp_client_set_iaid_duid(link->dhcp_client, | |
686 | link->network->iaid, | |
687 | duid->type, | |
688 | duid->raw_data_len > 0 ? duid->raw_data : NULL, | |
689 | duid->raw_data_len); | |
413708d1 VK |
690 | if (r < 0) |
691 | return r; | |
3e43b2cd | 692 | break; |
8341a5c3 | 693 | } |
3e43b2cd JJ |
694 | case DHCP_CLIENT_ID_MAC: |
695 | r = sd_dhcp_client_set_client_id(link->dhcp_client, | |
696 | ARPHRD_ETHER, | |
697 | (const uint8_t *) &link->mac, | |
8341a5c3 | 698 | sizeof(link->mac)); |
3e43b2cd JJ |
699 | if (r < 0) |
700 | return r; | |
701 | break; | |
702 | default: | |
703 | assert_not_reached("Unknown client identifier type."); | |
704 | } | |
705 | ||
3c9b8860 TG |
706 | return 0; |
707 | } |