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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
3c9b8860 | 2 | |
9aa5d8ba | 3 | #include <netinet/in.h> |
3c9b8860 TG |
4 | #include <linux/if.h> |
5 | ||
b5efdb8a | 6 | #include "alloc-util.h" |
958b66ea | 7 | #include "hostname-util.h" |
64b21ece | 8 | #include "parse-util.h" |
3c9b8860 | 9 | #include "network-internal.h" |
23f53b99 TG |
10 | #include "networkd-link.h" |
11 | #include "networkd-manager.h" | |
12 | #include "networkd-network.h" | |
64b21ece MV |
13 | #include "string-util.h" |
14 | #include "sysctl-util.h" | |
3c9b8860 | 15 | |
302a796f | 16 | static int dhcp4_route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
3c9b8860 TG |
17 | int r; |
18 | ||
19 | assert(link); | |
6cf4a01c | 20 | assert(link->dhcp4_messages > 0); |
3c9b8860 | 21 | |
313cefa1 | 22 | link->dhcp4_messages--; |
3c9b8860 | 23 | |
1c4baffc | 24 | r = sd_netlink_message_get_errno(m); |
3c9b8860 | 25 | if (r < 0 && r != -EEXIST) { |
f6b8196f | 26 | log_link_error_errno(link, r, "Could not set DHCPv4 route: %m"); |
3c9b8860 TG |
27 | link_enter_failed(link); |
28 | } | |
29 | ||
6cf4a01c | 30 | if (link->dhcp4_messages == 0) { |
3c9b8860 | 31 | link->dhcp4_configured = true; |
8012cd39 | 32 | link_check_ready(link); |
3c9b8860 TG |
33 | } |
34 | ||
35 | return 1; | |
36 | } | |
37 | ||
d6eac9bd DW |
38 | static int route_scope_from_address(const Route *route, const struct in_addr *self_addr) { |
39 | assert(route); | |
40 | assert(self_addr); | |
41 | ||
42 | if (in_addr_is_localhost(AF_INET, &route->dst) || | |
43 | (self_addr->s_addr && route->dst.in.s_addr == self_addr->s_addr)) | |
44 | return RT_SCOPE_HOST; | |
45 | else if (in4_addr_is_null(&route->gw.in)) | |
46 | return RT_SCOPE_LINK; | |
47 | else | |
48 | return RT_SCOPE_UNIVERSE; | |
49 | } | |
50 | ||
3c9b8860 | 51 | static int link_set_dhcp_routes(Link *link) { |
f8693fc7 | 52 | _cleanup_free_ sd_dhcp_route **static_routes = NULL; |
8cdc46e7 | 53 | bool classless_route = false, static_route = false; |
f8862395 TH |
54 | const struct in_addr *router; |
55 | struct in_addr address; | |
3c9b8860 | 56 | int r, n, i; |
fc1ba79d | 57 | uint32_t table; |
3c9b8860 TG |
58 | |
59 | assert(link); | |
0c9b15a3 AJ |
60 | |
61 | if (!link->dhcp_lease) /* link went down while we configured the IP addresses? */ | |
62 | return 0; | |
63 | ||
64 | if (!link->network) /* link went down while we configured the IP addresses? */ | |
65 | return 0; | |
964b26fe SS |
66 | |
67 | if (!link->network->dhcp_use_routes) | |
68 | return 0; | |
3c9b8860 | 69 | |
bdb9f580 | 70 | table = link_get_dhcp_route_table(link); |
fc1ba79d | 71 | |
b23aec0d DW |
72 | r = sd_dhcp_lease_get_address(link->dhcp_lease, &address); |
73 | if (r < 0) | |
74 | return log_link_warning_errno(link, r, "DHCP error: could not get address: %m"); | |
75 | ||
5f04a209 | 76 | n = sd_dhcp_lease_get_routes(link->dhcp_lease, &static_routes); |
599c44e6 YW |
77 | if (n == -ENODATA) |
78 | log_link_debug_errno(link, n, "DHCP: No routes received from DHCP server: %m"); | |
79 | else if (n < 0) | |
8dc787d1 | 80 | log_link_debug_errno(link, n, "DHCP error: could not get routes: %m"); |
5f04a209 | 81 | |
8cdc46e7 | 82 | for (i = 0; i < n; i++) { |
3476951c TH |
83 | switch (sd_dhcp_route_get_option(static_routes[i])) { |
84 | case SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE: | |
8cdc46e7 | 85 | classless_route = true; |
3476951c TH |
86 | break; |
87 | case SD_DHCP_OPTION_STATIC_ROUTE: | |
8cdc46e7 | 88 | static_route = true; |
3476951c TH |
89 | break; |
90 | } | |
8cdc46e7 SS |
91 | } |
92 | ||
5f04a209 | 93 | for (i = 0; i < n; i++) { |
8e766630 | 94 | _cleanup_(route_freep) Route *route = NULL; |
5f04a209 | 95 | |
8cdc46e7 SS |
96 | /* if the DHCP server returns both a Classless Static Routes option and a Static Routes option, |
97 | the DHCP client MUST ignore the Static Routes option. */ | |
3476951c TH |
98 | if (classless_route && |
99 | sd_dhcp_route_get_option(static_routes[i]) != SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE) | |
8cdc46e7 SS |
100 | continue; |
101 | ||
5f04a209 SS |
102 | r = route_new(&route); |
103 | if (r < 0) | |
104 | return log_link_error_errno(link, r, "Could not allocate route: %m"); | |
105 | ||
106 | route->family = AF_INET; | |
107 | route->protocol = RTPROT_DHCP; | |
108 | assert_se(sd_dhcp_route_get_gateway(static_routes[i], &route->gw.in) >= 0); | |
109 | assert_se(sd_dhcp_route_get_destination(static_routes[i], &route->dst.in) >= 0); | |
110 | assert_se(sd_dhcp_route_get_destination_prefix_length(static_routes[i], &route->dst_prefixlen) >= 0); | |
111 | route->priority = link->network->dhcp_route_metric; | |
112 | route->table = table; | |
113 | route->scope = route_scope_from_address(route, &address); | |
114 | ||
115 | r = route_configure(route, link, dhcp4_route_handler); | |
116 | if (r < 0) | |
1590dfa4 | 117 | return log_link_error_errno(link, r, "Could not set host route: %m"); |
5f04a209 SS |
118 | |
119 | link->dhcp4_messages++; | |
120 | } | |
121 | ||
f8862395 | 122 | r = sd_dhcp_lease_get_router(link->dhcp_lease, &router); |
825ace96 YW |
123 | if (IN_SET(r, 0, -ENODATA)) |
124 | log_link_info(link, "DHCP: No gateway received from DHCP server."); | |
125 | else if (r < 0) | |
444b0170 | 126 | log_link_warning_errno(link, r, "DHCP error: could not get gateway: %m"); |
825ace96 YW |
127 | else if (in4_addr_is_null(&router[0])) |
128 | log_link_info(link, "DHCP: Received gateway is null."); | |
f6b8196f | 129 | |
5f04a209 SS |
130 | /* According to RFC 3442: If the DHCP server returns both a Classless Static Routes option and |
131 | a Router option, the DHCP client MUST ignore the Router option. */ | |
8cdc46e7 SS |
132 | if (classless_route && static_route) |
133 | log_link_warning(link, "Classless static routes received from DHCP server: ignoring static-route option and router option"); | |
134 | ||
f8862395 | 135 | if (r > 0 && !classless_route && !in4_addr_is_null(&router[0])) { |
860e636c | 136 | _cleanup_(route_freep) Route *route = NULL, *route_gw = NULL; |
ed9e361a TG |
137 | |
138 | r = route_new(&route_gw); | |
f6b8196f LP |
139 | if (r < 0) |
140 | return log_link_error_errno(link, r, "Could not allocate route: %m"); | |
3c9b8860 TG |
141 | |
142 | /* The dhcp netmask may mask out the gateway. Add an explicit | |
143 | * route for the gw host so that we can route no matter the | |
144 | * netmask or existing kernel route tables. */ | |
145 | route_gw->family = AF_INET; | |
f8862395 | 146 | route_gw->dst.in = router[0]; |
3c9b8860 | 147 | route_gw->dst_prefixlen = 32; |
2ce40956 | 148 | route_gw->prefsrc.in = address; |
3c9b8860 | 149 | route_gw->scope = RT_SCOPE_LINK; |
ed9e361a | 150 | route_gw->protocol = RTPROT_DHCP; |
86655331 | 151 | route_gw->priority = link->network->dhcp_route_metric; |
fc1ba79d | 152 | route_gw->table = table; |
3c9b8860 | 153 | |
483d099e | 154 | r = route_configure(route_gw, link, dhcp4_route_handler); |
f6b8196f | 155 | if (r < 0) |
1590dfa4 | 156 | return log_link_error_errno(link, r, "Could not set host route: %m"); |
3c9b8860 | 157 | |
313cefa1 | 158 | link->dhcp4_messages++; |
3c9b8860 | 159 | |
860e636c YW |
160 | r = route_new(&route); |
161 | if (r < 0) | |
162 | return log_link_error_errno(link, r, "Could not allocate route: %m"); | |
163 | ||
3c9b8860 | 164 | route->family = AF_INET; |
f8862395 | 165 | route->gw.in = router[0]; |
2ce40956 | 166 | route->prefsrc.in = address; |
860e636c | 167 | route->protocol = RTPROT_DHCP; |
86655331 | 168 | route->priority = link->network->dhcp_route_metric; |
fc1ba79d | 169 | route->table = table; |
3c9b8860 | 170 | |
483d099e | 171 | r = route_configure(route, link, dhcp4_route_handler); |
1590dfa4 YW |
172 | if (r < 0) |
173 | return log_link_error_errno(link, r, "Could not set routes: %m"); | |
3c9b8860 | 174 | |
313cefa1 | 175 | link->dhcp4_messages++; |
3c9b8860 TG |
176 | } |
177 | ||
3c9b8860 TG |
178 | return 0; |
179 | } | |
180 | ||
7fa472f9 YW |
181 | static int dhcp_remove_routes(Link *link, struct in_addr *address) { |
182 | _cleanup_free_ sd_dhcp_route **routes = NULL; | |
183 | uint32_t table; | |
184 | int n, i, r; | |
3c9b8860 TG |
185 | |
186 | assert(link); | |
7fa472f9 | 187 | assert(address); |
3c9b8860 | 188 | |
7fa472f9 YW |
189 | if (!link->network->dhcp_use_routes) |
190 | return 0; | |
3c9b8860 | 191 | |
7fa472f9 YW |
192 | n = sd_dhcp_lease_get_routes(link->dhcp_lease, &routes); |
193 | if (IN_SET(n, 0, -ENODATA)) { | |
194 | log_link_debug(link, "DHCP: No routes received from DHCP server: %m"); | |
195 | return 0; | |
196 | } else if (n < 0) | |
197 | return log_link_error_errno(link, n, "DHCP error: could not get routes: %m"); | |
4c9c8272 | 198 | |
7fa472f9 | 199 | table = link_get_dhcp_route_table(link); |
8df8ce78 | 200 | |
7fa472f9 YW |
201 | for (i = 0; i < n; i++) { |
202 | _cleanup_(route_freep) Route *route = NULL; | |
3c9b8860 | 203 | |
7fa472f9 YW |
204 | r = route_new(&route); |
205 | if (r < 0) | |
206 | return log_oom(); | |
207 | ||
208 | route->family = AF_INET; | |
209 | assert_se(sd_dhcp_route_get_gateway(routes[i], &route->gw.in) >= 0); | |
210 | assert_se(sd_dhcp_route_get_destination(routes[i], &route->dst.in) >= 0); | |
211 | assert_se(sd_dhcp_route_get_destination_prefix_length(routes[i], &route->dst_prefixlen) >= 0); | |
212 | route->priority = link->network->dhcp_route_metric; | |
213 | route->table = table; | |
214 | route->scope = route_scope_from_address(route, address); | |
215 | ||
216 | (void) route_remove(route, link, NULL); | |
b5799eeb | 217 | } |
3c9b8860 | 218 | |
7fa472f9 YW |
219 | return n; |
220 | } | |
8df8ce78 | 221 | |
7fa472f9 YW |
222 | static int dhcp_remove_router(Link *link, struct in_addr *address) { |
223 | _cleanup_(route_freep) Route *route_gw = NULL, *route = NULL; | |
224 | const struct in_addr *router; | |
225 | uint32_t table; | |
226 | int r; | |
8df8ce78 | 227 | |
7fa472f9 YW |
228 | assert(link); |
229 | assert(address); | |
3c9b8860 | 230 | |
7fa472f9 YW |
231 | if (!link->network->dhcp_use_routes) |
232 | return 0; | |
3c9b8860 | 233 | |
7fa472f9 YW |
234 | r = sd_dhcp_lease_get_router(link->dhcp_lease, &router); |
235 | if (IN_SET(r, 0, -ENODATA)) { | |
236 | log_link_debug(link, "DHCP: No gateway received from DHCP server."); | |
237 | return 0; | |
238 | } else if (r < 0) | |
239 | return log_link_error_errno(link, r, "DHCP error: could not get gateway: %m"); | |
240 | else if (in4_addr_is_null(&router[0])) { | |
241 | log_link_info(link, "DHCP: Received gateway is null, ignoring."); | |
242 | return 0; | |
3c9b8860 TG |
243 | } |
244 | ||
7fa472f9 | 245 | table = link_get_dhcp_route_table(link); |
3c9b8860 | 246 | |
7fa472f9 YW |
247 | r = route_new(&route_gw); |
248 | if (r < 0) | |
249 | return log_oom(); | |
3c9b8860 | 250 | |
7fa472f9 YW |
251 | route_gw->family = AF_INET; |
252 | route_gw->dst.in = router[0]; | |
253 | route_gw->dst_prefixlen = 32; | |
254 | route_gw->prefsrc.in = *address; | |
255 | route_gw->scope = RT_SCOPE_LINK; | |
256 | route_gw->protocol = RTPROT_DHCP; | |
257 | route_gw->priority = link->network->dhcp_route_metric; | |
258 | route_gw->table = table; | |
a7d0ef44 | 259 | |
7fa472f9 YW |
260 | (void) route_remove(route_gw, link, NULL); |
261 | ||
262 | r = route_new(&route); | |
263 | if (r < 0) | |
264 | return log_oom(); | |
265 | ||
266 | route->family = AF_INET; | |
267 | route->gw.in = router[0]; | |
268 | route->prefsrc.in = *address; | |
269 | route->protocol = RTPROT_DHCP; | |
270 | route->priority = link->network->dhcp_route_metric; | |
271 | route->table = table; | |
272 | ||
273 | (void) route_remove(route, link, NULL); | |
274 | ||
275 | return 0; | |
276 | } | |
277 | ||
278 | static int dhcp_remove_address(Link *link, struct in_addr *address) { | |
279 | _cleanup_(address_freep) Address *a = NULL; | |
280 | struct in_addr netmask; | |
281 | int r; | |
282 | ||
283 | assert(link); | |
284 | assert(address); | |
285 | ||
286 | if (in4_addr_is_null(address)) | |
287 | return 0; | |
288 | ||
289 | r = address_new(&a); | |
290 | if (r < 0) | |
291 | return log_oom(); | |
292 | ||
293 | a->family = AF_INET; | |
294 | a->in_addr.in = *address; | |
295 | ||
296 | if (sd_dhcp_lease_get_netmask(link->dhcp_lease, &netmask) >= 0) | |
297 | a->prefixlen = in4_addr_netmask_to_prefixlen(&netmask); | |
298 | ||
299 | (void) address_remove(a, link, NULL); | |
300 | ||
301 | return 0; | |
302 | } | |
303 | ||
304 | static int dhcp_reset_mtu(Link *link) { | |
305 | uint16_t mtu; | |
306 | int r; | |
307 | ||
308 | assert(link); | |
309 | ||
310 | if (!link->network->dhcp_use_mtu) | |
311 | return 0; | |
312 | ||
313 | r = sd_dhcp_lease_get_mtu(link->dhcp_lease, &mtu); | |
314 | if (r < 0) | |
315 | return r; | |
316 | ||
317 | if (link->original_mtu == mtu) | |
318 | return 0; | |
319 | ||
320 | r = link_set_mtu(link, link->original_mtu); | |
321 | if (r < 0) { | |
322 | log_link_error_errno(link, r, "DHCP error: could not reset MTU: %m"); | |
323 | link_enter_failed(link); | |
324 | return r; | |
3c9b8860 TG |
325 | } |
326 | ||
7fa472f9 YW |
327 | return 0; |
328 | } | |
329 | ||
330 | static int dhcp_reset_hostname(Link *link) { | |
331 | const char *hostname; | |
332 | int r; | |
333 | ||
334 | assert(link); | |
335 | ||
336 | if (!link->network->dhcp_use_hostname) | |
337 | return 0; | |
338 | ||
339 | hostname = link->network->dhcp_hostname; | |
340 | if (!hostname) | |
341 | (void) sd_dhcp_lease_get_hostname(link->dhcp_lease, &hostname); | |
342 | ||
343 | if (!hostname) | |
344 | return 0; | |
345 | ||
346 | /* If a hostname was set due to the lease, then unset it now. */ | |
347 | r = manager_set_hostname(link->manager, NULL); | |
348 | if (r < 0) | |
349 | return log_link_error_errno(link, r, "DHCP error: Failed to reset transient hostname: %m"); | |
350 | ||
351 | return 0; | |
352 | } | |
353 | ||
354 | static int dhcp_lease_lost(Link *link) { | |
355 | struct in_addr address = {}; | |
356 | ||
357 | assert(link); | |
358 | assert(link->dhcp_lease); | |
359 | ||
360 | log_link_warning(link, "DHCP lease lost"); | |
361 | ||
362 | link->dhcp4_configured = false; | |
363 | ||
364 | (void) sd_dhcp_lease_get_address(link->dhcp_lease, &address); | |
365 | (void) dhcp_remove_routes(link, &address); | |
366 | (void) dhcp_remove_router(link, &address); | |
367 | (void) dhcp_remove_address(link, &address); | |
368 | (void) dhcp_reset_mtu(link); | |
369 | (void) dhcp_reset_hostname(link); | |
370 | ||
3c9b8860 | 371 | link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease); |
6a3e5f6a | 372 | link_dirty(link); |
3c9b8860 TG |
373 | |
374 | return 0; | |
375 | } | |
376 | ||
302a796f | 377 | static int dhcp4_address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
3c9b8860 TG |
378 | int r; |
379 | ||
380 | assert(link); | |
381 | ||
1c4baffc | 382 | r = sd_netlink_message_get_errno(m); |
3c9b8860 | 383 | if (r < 0 && r != -EEXIST) { |
f6b8196f | 384 | log_link_error_errno(link, r, "Could not set DHCPv4 address: %m"); |
3c9b8860 | 385 | link_enter_failed(link); |
45af44d4 | 386 | } else if (r >= 0) |
200a0868 | 387 | manager_rtnl_process_address(rtnl, m, link->manager); |
3c9b8860 | 388 | |
1590dfa4 YW |
389 | r = link_set_dhcp_routes(link); |
390 | if (r < 0) { | |
391 | link_enter_failed(link); | |
392 | return 1; | |
393 | } | |
3c9b8860 | 394 | |
b5799eeb SS |
395 | /* Add back static routes since kernel removes while DHCPv4 address is removed from when lease expires */ |
396 | link_request_set_routes(link); | |
397 | ||
223932c7 AH |
398 | if (link->dhcp4_messages == 0) { |
399 | link->dhcp4_configured = true; | |
400 | link_check_ready(link); | |
401 | } | |
402 | ||
3c9b8860 TG |
403 | return 1; |
404 | } | |
405 | ||
406 | static int dhcp4_update_address(Link *link, | |
407 | struct in_addr *address, | |
408 | struct in_addr *netmask, | |
409 | uint32_t lifetime) { | |
8e766630 | 410 | _cleanup_(address_freep) Address *addr = NULL; |
3c9b8860 TG |
411 | unsigned prefixlen; |
412 | int r; | |
413 | ||
414 | assert(address); | |
415 | assert(netmask); | |
416 | assert(lifetime); | |
417 | ||
5a941f5f | 418 | prefixlen = in4_addr_netmask_to_prefixlen(netmask); |
3c9b8860 | 419 | |
f0213e37 | 420 | r = address_new(&addr); |
3c9b8860 TG |
421 | if (r < 0) |
422 | return r; | |
423 | ||
424 | addr->family = AF_INET; | |
425 | addr->in_addr.in.s_addr = address->s_addr; | |
426 | addr->cinfo.ifa_prefered = lifetime; | |
427 | addr->cinfo.ifa_valid = lifetime; | |
428 | addr->prefixlen = prefixlen; | |
429 | addr->broadcast.s_addr = address->s_addr | ~netmask->s_addr; | |
430 | ||
66669078 TG |
431 | /* allow reusing an existing address and simply update its lifetime |
432 | * in case it already exists */ | |
483d099e | 433 | r = address_configure(addr, link, dhcp4_address_handler, true); |
3c9b8860 TG |
434 | if (r < 0) |
435 | return r; | |
436 | ||
437 | return 0; | |
438 | } | |
439 | ||
440 | static int dhcp_lease_renew(sd_dhcp_client *client, Link *link) { | |
441 | sd_dhcp_lease *lease; | |
442 | struct in_addr address; | |
443 | struct in_addr netmask; | |
444 | uint32_t lifetime = CACHE_INFO_INFINITY_LIFE_TIME; | |
445 | int r; | |
446 | ||
447 | assert(link); | |
448 | assert(client); | |
449 | assert(link->network); | |
450 | ||
451 | r = sd_dhcp_client_get_lease(client, &lease); | |
f6b8196f LP |
452 | if (r < 0) |
453 | return log_link_warning_errno(link, r, "DHCP error: no lease: %m"); | |
3c9b8860 TG |
454 | |
455 | sd_dhcp_lease_unref(link->dhcp_lease); | |
456 | link->dhcp4_configured = false; | |
e6b18ffa | 457 | link->dhcp_lease = sd_dhcp_lease_ref(lease); |
6a3e5f6a | 458 | link_dirty(link); |
3c9b8860 TG |
459 | |
460 | r = sd_dhcp_lease_get_address(lease, &address); | |
f6b8196f LP |
461 | if (r < 0) |
462 | return log_link_warning_errno(link, r, "DHCP error: no address: %m"); | |
3c9b8860 TG |
463 | |
464 | r = sd_dhcp_lease_get_netmask(lease, &netmask); | |
f6b8196f LP |
465 | if (r < 0) |
466 | return log_link_warning_errno(link, r, "DHCP error: no netmask: %m"); | |
3c9b8860 | 467 | |
7da377ef | 468 | if (!FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP)) { |
f6b8196f LP |
469 | r = sd_dhcp_lease_get_lifetime(link->dhcp_lease, &lifetime); |
470 | if (r < 0) | |
471 | return log_link_warning_errno(link, r, "DHCP error: no lifetime: %m"); | |
3c9b8860 TG |
472 | } |
473 | ||
474 | r = dhcp4_update_address(link, &address, &netmask, lifetime); | |
a2f68490 YW |
475 | if (r < 0) |
476 | return log_link_warning_errno(link, r, "Could not update IP address: %m"); | |
3c9b8860 TG |
477 | |
478 | return 0; | |
479 | } | |
480 | ||
481 | static int dhcp_lease_acquired(sd_dhcp_client *client, Link *link) { | |
f8862395 | 482 | const struct in_addr *router; |
3c9b8860 TG |
483 | sd_dhcp_lease *lease; |
484 | struct in_addr address; | |
485 | struct in_addr netmask; | |
3c9b8860 TG |
486 | unsigned prefixlen; |
487 | uint32_t lifetime = CACHE_INFO_INFINITY_LIFE_TIME; | |
488 | int r; | |
489 | ||
490 | assert(client); | |
491 | assert(link); | |
492 | ||
a20c909c YW |
493 | link->dhcp4_configured = false; |
494 | ||
3c9b8860 | 495 | r = sd_dhcp_client_get_lease(client, &lease); |
f2341e0a | 496 | if (r < 0) |
f6b8196f | 497 | return log_link_error_errno(link, r, "DHCP error: No lease: %m"); |
3c9b8860 TG |
498 | |
499 | r = sd_dhcp_lease_get_address(lease, &address); | |
f2341e0a | 500 | if (r < 0) |
f6b8196f | 501 | return log_link_error_errno(link, r, "DHCP error: No address: %m"); |
3c9b8860 TG |
502 | |
503 | r = sd_dhcp_lease_get_netmask(lease, &netmask); | |
f2341e0a | 504 | if (r < 0) |
f6b8196f | 505 | return log_link_error_errno(link, r, "DHCP error: No netmask: %m"); |
3c9b8860 | 506 | |
5a941f5f | 507 | prefixlen = in4_addr_netmask_to_prefixlen(&netmask); |
3c9b8860 | 508 | |
448aaf9f YW |
509 | if (!FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP)) { |
510 | r = sd_dhcp_lease_get_lifetime(lease, &lifetime); | |
511 | if (r < 0) | |
512 | return log_link_warning_errno(link, r, "DHCP error: no lifetime: %m"); | |
513 | } | |
514 | ||
f8862395 | 515 | r = sd_dhcp_lease_get_router(lease, &router); |
397d15fd | 516 | if (r < 0 && r != -ENODATA) |
f6b8196f | 517 | return log_link_error_errno(link, r, "DHCP error: Could not get gateway: %m"); |
3c9b8860 | 518 | |
f8862395 | 519 | if (r > 0 && !in4_addr_is_null(&router[0])) |
f2341e0a LP |
520 | log_struct(LOG_INFO, |
521 | LOG_LINK_INTERFACE(link), | |
522 | LOG_LINK_MESSAGE(link, "DHCPv4 address %u.%u.%u.%u/%u via %u.%u.%u.%u", | |
523 | ADDRESS_FMT_VAL(address), | |
524 | prefixlen, | |
f8862395 | 525 | ADDRESS_FMT_VAL(router[0])), |
f2341e0a LP |
526 | "ADDRESS=%u.%u.%u.%u", ADDRESS_FMT_VAL(address), |
527 | "PREFIXLEN=%u", prefixlen, | |
f8862395 | 528 | "GATEWAY=%u.%u.%u.%u", ADDRESS_FMT_VAL(router[0])); |
3c9b8860 | 529 | else |
f2341e0a LP |
530 | log_struct(LOG_INFO, |
531 | LOG_LINK_INTERFACE(link), | |
532 | LOG_LINK_MESSAGE(link, "DHCPv4 address %u.%u.%u.%u/%u", | |
533 | ADDRESS_FMT_VAL(address), | |
534 | prefixlen), | |
535 | "ADDRESS=%u.%u.%u.%u", ADDRESS_FMT_VAL(address), | |
a1230ff9 | 536 | "PREFIXLEN=%u", prefixlen); |
3c9b8860 | 537 | |
e6b18ffa | 538 | link->dhcp_lease = sd_dhcp_lease_ref(lease); |
6a3e5f6a | 539 | link_dirty(link); |
3c9b8860 | 540 | |
27cb34f5 | 541 | if (link->network->dhcp_use_mtu) { |
3c9b8860 TG |
542 | uint16_t mtu; |
543 | ||
544 | r = sd_dhcp_lease_get_mtu(lease, &mtu); | |
545 | if (r >= 0) { | |
933c70a0 | 546 | r = link_set_mtu(link, mtu); |
3c9b8860 | 547 | if (r < 0) |
f2341e0a | 548 | log_link_error_errno(link, r, "Failed to set MTU to %" PRIu16 ": %m", mtu); |
3c9b8860 TG |
549 | } |
550 | } | |
551 | ||
27cb34f5 | 552 | if (link->network->dhcp_use_hostname) { |
2de2abad LB |
553 | const char *dhcpname = NULL; |
554 | _cleanup_free_ char *hostname = NULL; | |
3c9b8860 | 555 | |
27cb34f5 | 556 | if (link->network->dhcp_hostname) |
2de2abad | 557 | dhcpname = link->network->dhcp_hostname; |
dce391e7 | 558 | else |
2de2abad LB |
559 | (void) sd_dhcp_lease_get_hostname(lease, &dhcpname); |
560 | ||
561 | if (dhcpname) { | |
562 | r = shorten_overlong(dhcpname, &hostname); | |
563 | if (r < 0) | |
564 | log_link_warning_errno(link, r, "Unable to shorten overlong DHCP hostname '%s', ignoring: %m", dhcpname); | |
565 | if (r == 1) | |
5238e957 | 566 | log_link_notice(link, "Overlong DHCP hostname received, shortened from '%s' to '%s'", dhcpname, hostname); |
2de2abad | 567 | } |
a7d0ef44 | 568 | |
dce391e7 | 569 | if (hostname) { |
59eb33e0 | 570 | r = manager_set_hostname(link->manager, hostname); |
3c9b8860 | 571 | if (r < 0) |
f2341e0a | 572 | log_link_error_errno(link, r, "Failed to set transient hostname to '%s': %m", hostname); |
3c9b8860 TG |
573 | } |
574 | } | |
575 | ||
27cb34f5 | 576 | if (link->network->dhcp_use_timezone) { |
21b80ad1 LP |
577 | const char *tz = NULL; |
578 | ||
579 | (void) sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz); | |
580 | ||
581 | if (tz) { | |
59eb33e0 | 582 | r = manager_set_timezone(link->manager, tz); |
21b80ad1 LP |
583 | if (r < 0) |
584 | log_link_error_errno(link, r, "Failed to set timezone to '%s': %m", tz); | |
585 | } | |
586 | } | |
587 | ||
3c9b8860 | 588 | r = dhcp4_update_address(link, &address, &netmask, lifetime); |
a2f68490 YW |
589 | if (r < 0) |
590 | return log_link_warning_errno(link, r, "Could not update IP address: %m"); | |
3c9b8860 TG |
591 | |
592 | return 0; | |
593 | } | |
8bc17bb3 | 594 | |
727b5734 SS |
595 | static int dhcp_server_is_black_listed(Link *link, sd_dhcp_client *client) { |
596 | sd_dhcp_lease *lease; | |
597 | struct in_addr addr; | |
598 | int r; | |
599 | ||
600 | assert(link); | |
601 | assert(link->network); | |
602 | assert(client); | |
603 | ||
604 | r = sd_dhcp_client_get_lease(client, &lease); | |
605 | if (r < 0) | |
606 | return log_link_error_errno(link, r, "Failed to get DHCP lease: %m"); | |
607 | ||
608 | r = sd_dhcp_lease_get_server_identifier(lease, &addr); | |
609 | if (r < 0) | |
610 | return log_link_debug_errno(link, r, "Failed to get DHCP server ip address: %m"); | |
611 | ||
612 | if (set_contains(link->network->dhcp_black_listed_ip, UINT32_TO_PTR(addr.s_addr))) { | |
613 | log_struct(LOG_DEBUG, | |
614 | LOG_LINK_INTERFACE(link), | |
615 | LOG_LINK_MESSAGE(link, "DHCPv4 ip '%u.%u.%u.%u' found in black listed ip addresses, ignoring offer", | |
616 | ADDRESS_FMT_VAL(addr))); | |
617 | return true; | |
618 | } | |
619 | ||
620 | return false; | |
621 | } | |
622 | ||
623 | static int dhcp4_handler(sd_dhcp_client *client, int event, void *userdata) { | |
3c9b8860 | 624 | Link *link = userdata; |
86e2be7b | 625 | int r; |
3c9b8860 TG |
626 | |
627 | assert(link); | |
628 | assert(link->network); | |
629 | assert(link->manager); | |
630 | ||
631 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
727b5734 | 632 | return 0; |
3c9b8860 TG |
633 | |
634 | switch (event) { | |
03748142 | 635 | case SD_DHCP_CLIENT_EVENT_STOP: |
8bc17bb3 | 636 | |
910feb78 | 637 | if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4)) { |
8bc17bb3 SS |
638 | assert(link->ipv4ll); |
639 | ||
640 | log_link_debug(link, "DHCP client is stopped. Acquiring IPv4 link-local address"); | |
641 | ||
642 | r = sd_ipv4ll_start(link->ipv4ll); | |
727b5734 SS |
643 | if (r < 0) |
644 | return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m"); | |
8bc17bb3 SS |
645 | } |
646 | ||
7da377ef | 647 | if (FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP)) { |
efdb62df YW |
648 | log_link_notice(link, "DHCPv4 connection considered critical, ignoring request to reconfigure it."); |
649 | return 0; | |
650 | } | |
651 | ||
1501b429 SS |
652 | if (link->network->dhcp_send_release) |
653 | (void) sd_dhcp_client_send_release(client); | |
654 | ||
efdb62df YW |
655 | if (link->dhcp_lease) { |
656 | r = dhcp_lease_lost(link); | |
657 | if (r < 0) { | |
658 | link_enter_failed(link); | |
659 | return r; | |
660 | } | |
661 | } | |
662 | ||
663 | break; | |
8bc17bb3 | 664 | case SD_DHCP_CLIENT_EVENT_EXPIRED: |
03748142 | 665 | case SD_DHCP_CLIENT_EVENT_IP_CHANGE: |
8bc17bb3 | 666 | |
7da377ef | 667 | if (FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP)) { |
efdb62df | 668 | log_link_notice(link, "DHCPv4 connection considered critical, ignoring request to reconfigure it."); |
727b5734 | 669 | return 0; |
3c9b8860 TG |
670 | } |
671 | ||
672 | if (link->dhcp_lease) { | |
673 | r = dhcp_lease_lost(link); | |
674 | if (r < 0) { | |
675 | link_enter_failed(link); | |
727b5734 | 676 | return r; |
3c9b8860 TG |
677 | } |
678 | } | |
679 | ||
03748142 | 680 | if (event == SD_DHCP_CLIENT_EVENT_IP_CHANGE) { |
3c9b8860 TG |
681 | r = dhcp_lease_acquired(client, link); |
682 | if (r < 0) { | |
683 | link_enter_failed(link); | |
727b5734 | 684 | return r; |
3c9b8860 TG |
685 | } |
686 | } | |
687 | ||
688 | break; | |
03748142 | 689 | case SD_DHCP_CLIENT_EVENT_RENEW: |
3c9b8860 TG |
690 | r = dhcp_lease_renew(client, link); |
691 | if (r < 0) { | |
692 | link_enter_failed(link); | |
727b5734 | 693 | return r; |
3c9b8860 TG |
694 | } |
695 | break; | |
03748142 | 696 | case SD_DHCP_CLIENT_EVENT_IP_ACQUIRE: |
3c9b8860 TG |
697 | r = dhcp_lease_acquired(client, link); |
698 | if (r < 0) { | |
699 | link_enter_failed(link); | |
727b5734 | 700 | return r; |
3c9b8860 TG |
701 | } |
702 | break; | |
727b5734 SS |
703 | case SD_DHCP_CLIENT_EVENT_SELECTING: |
704 | r = dhcp_server_is_black_listed(link, client); | |
705 | if (r < 0) | |
706 | return r; | |
707 | if (r != 0) | |
708 | return -ENOMSG; | |
709 | break; | |
3c9b8860 TG |
710 | default: |
711 | if (event < 0) | |
f6b8196f | 712 | log_link_warning_errno(link, event, "DHCP error: Client failed: %m"); |
3c9b8860 | 713 | else |
f6b8196f | 714 | log_link_warning(link, "DHCP unknown event: %i", event); |
3c9b8860 TG |
715 | break; |
716 | } | |
717 | ||
727b5734 | 718 | return 0; |
3c9b8860 TG |
719 | } |
720 | ||
7192bb81 LP |
721 | static int dhcp4_set_hostname(Link *link) { |
722 | _cleanup_free_ char *hostname = NULL; | |
723 | const char *hn; | |
724 | int r; | |
725 | ||
726 | assert(link); | |
727 | ||
728 | if (!link->network->dhcp_send_hostname) | |
729 | hn = NULL; | |
730 | else if (link->network->dhcp_hostname) | |
731 | hn = link->network->dhcp_hostname; | |
732 | else { | |
733 | r = gethostname_strict(&hostname); | |
734 | if (r < 0 && r != -ENXIO) /* ENXIO: no hostname set or hostname is "localhost" */ | |
735 | return r; | |
736 | ||
737 | hn = hostname; | |
738 | } | |
739 | ||
a8494759 YW |
740 | r = sd_dhcp_client_set_hostname(link->dhcp_client, hn); |
741 | if (r == -EINVAL && hostname) | |
742 | /* Ignore error when the machine's hostname is not suitable to send in DHCP packet. */ | |
743 | log_link_warning_errno(link, r, "DHCP4 CLIENT: Failed to set hostname from kernel hostname, ignoring: %m"); | |
744 | else if (r < 0) | |
745 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set hostname: %m"); | |
746 | ||
747 | return 0; | |
7192bb81 LP |
748 | } |
749 | ||
64b21ece | 750 | static bool promote_secondaries_enabled(const char *ifname) { |
3f550c31 HV |
751 | _cleanup_free_ char *promote_secondaries_sysctl = NULL; |
752 | char *promote_secondaries_path; | |
64b21ece MV |
753 | int r; |
754 | ||
755 | promote_secondaries_path = strjoina("net/ipv4/conf/", ifname, "/promote_secondaries"); | |
756 | r = sysctl_read(promote_secondaries_path, &promote_secondaries_sysctl); | |
757 | if (r < 0) { | |
758 | log_debug_errno(r, "Cannot read sysctl %s", promote_secondaries_path); | |
759 | return false; | |
760 | } | |
761 | ||
762 | truncate_nl(promote_secondaries_sysctl); | |
763 | r = parse_boolean(promote_secondaries_sysctl); | |
764 | if (r < 0) | |
765 | log_warning_errno(r, "Cannot parse sysctl %s with content %s as boolean", promote_secondaries_path, promote_secondaries_sysctl); | |
766 | return r > 0; | |
767 | } | |
768 | ||
769 | /* dhcp4_set_promote_secondaries will ensure this interface has | |
770 | * the "promote_secondaries" option in the kernel set. If this sysctl | |
771 | * is not set DHCP will work only as long as the IP address does not | |
772 | * changes between leases. The kernel will remove all secondary IP | |
773 | * addresses of an interface otherwise. The way systemd-network works | |
774 | * is that the new IP of a lease is added as a secondary IP and when | |
775 | * the primary one expires it relies on the kernel to promote the | |
776 | * secondary IP. See also https://github.com/systemd/systemd/issues/7163 | |
777 | */ | |
778 | int dhcp4_set_promote_secondaries(Link *link) { | |
779 | int r; | |
780 | ||
781 | assert(link); | |
782 | assert(link->network); | |
783 | assert(link->network->dhcp & ADDRESS_FAMILY_IPV4); | |
784 | ||
785 | /* check if the kernel has promote_secondaries enabled for our | |
786 | * interface. If it is not globally enabled or enabled for the | |
787 | * specific interface we must either enable it. | |
788 | */ | |
8e1a7253 | 789 | if (!(promote_secondaries_enabled("all") || promote_secondaries_enabled(link->ifname))) { |
64b21ece MV |
790 | char *promote_secondaries_path = NULL; |
791 | ||
792 | log_link_debug(link, "promote_secondaries is unset, setting it"); | |
793 | promote_secondaries_path = strjoina("net/ipv4/conf/", link->ifname, "/promote_secondaries"); | |
794 | r = sysctl_write(promote_secondaries_path, "1"); | |
795 | if (r < 0) | |
796 | log_link_warning_errno(link, r, "cannot set sysctl %s to 1", promote_secondaries_path); | |
797 | return r > 0; | |
798 | } | |
799 | ||
800 | return 0; | |
801 | } | |
802 | ||
fff1f40c YW |
803 | int dhcp4_set_client_identifier(Link *link) { |
804 | int r; | |
805 | ||
806 | assert(link); | |
807 | assert(link->network); | |
808 | assert(link->dhcp_client); | |
809 | ||
810 | switch (link->network->dhcp_client_identifier) { | |
811 | case DHCP_CLIENT_ID_DUID: { | |
0cf7c3fd | 812 | /* If configured, apply user specified DUID and IAID */ |
fff1f40c YW |
813 | const DUID *duid = link_get_duid(link); |
814 | ||
0cf7c3fd YW |
815 | if (duid->type == DUID_TYPE_LLT && duid->raw_data_len == 0) |
816 | r = sd_dhcp_client_set_iaid_duid_llt(link->dhcp_client, | |
8217ed5e | 817 | link->network->iaid_set, |
0cf7c3fd YW |
818 | link->network->iaid, |
819 | duid->llt_time); | |
820 | else | |
821 | r = sd_dhcp_client_set_iaid_duid(link->dhcp_client, | |
8217ed5e | 822 | link->network->iaid_set, |
0cf7c3fd YW |
823 | link->network->iaid, |
824 | duid->type, | |
825 | duid->raw_data_len > 0 ? duid->raw_data : NULL, | |
826 | duid->raw_data_len); | |
fff1f40c | 827 | if (r < 0) |
0cf7c3fd | 828 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set IAID+DUID: %m"); |
fff1f40c YW |
829 | break; |
830 | } | |
831 | case DHCP_CLIENT_ID_DUID_ONLY: { | |
832 | /* If configured, apply user specified DUID */ | |
833 | const DUID *duid = link_get_duid(link); | |
834 | ||
0cf7c3fd YW |
835 | if (duid->type == DUID_TYPE_LLT && duid->raw_data_len == 0) |
836 | r = sd_dhcp_client_set_duid_llt(link->dhcp_client, | |
89b3fa66 | 837 | duid->llt_time); |
0cf7c3fd YW |
838 | else |
839 | r = sd_dhcp_client_set_duid(link->dhcp_client, | |
840 | duid->type, | |
841 | duid->raw_data_len > 0 ? duid->raw_data : NULL, | |
842 | duid->raw_data_len); | |
fff1f40c YW |
843 | if (r < 0) |
844 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set DUID: %m"); | |
845 | break; | |
846 | } | |
847 | case DHCP_CLIENT_ID_MAC: | |
848 | r = sd_dhcp_client_set_client_id(link->dhcp_client, | |
849 | ARPHRD_ETHER, | |
850 | (const uint8_t *) &link->mac, | |
851 | sizeof(link->mac)); | |
852 | if (r < 0) | |
853 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set client ID: %m"); | |
854 | break; | |
855 | default: | |
856 | assert_not_reached("Unknown client identifier type."); | |
857 | } | |
858 | ||
859 | return 0; | |
860 | } | |
861 | ||
3c9b8860 TG |
862 | int dhcp4_configure(Link *link) { |
863 | int r; | |
864 | ||
865 | assert(link); | |
866 | assert(link->network); | |
e0ee46f2 | 867 | assert(link->network->dhcp & ADDRESS_FAMILY_IPV4); |
3c9b8860 | 868 | |
0bc70f1d | 869 | if (!link->dhcp_client) { |
db3d2358 | 870 | r = sd_dhcp_client_new(&link->dhcp_client, link->network->dhcp_anonymize); |
1f6860d9 YW |
871 | if (r == -ENOMEM) |
872 | return log_oom(); | |
0bc70f1d | 873 | if (r < 0) |
1f6860d9 | 874 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to create DHCP4 client: %m"); |
0bc70f1d | 875 | } |
3c9b8860 TG |
876 | |
877 | r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0); | |
878 | if (r < 0) | |
1f6860d9 | 879 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to attach event: %m"); |
3c9b8860 | 880 | |
76253e73 DW |
881 | r = sd_dhcp_client_set_mac(link->dhcp_client, |
882 | (const uint8_t *) &link->mac, | |
883 | sizeof (link->mac), ARPHRD_ETHER); | |
3c9b8860 | 884 | if (r < 0) |
1f6860d9 | 885 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set MAC address: %m"); |
3c9b8860 | 886 | |
2f8e7633 | 887 | r = sd_dhcp_client_set_ifindex(link->dhcp_client, link->ifindex); |
3c9b8860 | 888 | if (r < 0) |
1f6860d9 | 889 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set ifindex: %m"); |
3c9b8860 TG |
890 | |
891 | r = sd_dhcp_client_set_callback(link->dhcp_client, dhcp4_handler, link); | |
892 | if (r < 0) | |
1f6860d9 | 893 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set callback: %m"); |
3c9b8860 TG |
894 | |
895 | r = sd_dhcp_client_set_request_broadcast(link->dhcp_client, | |
896 | link->network->dhcp_broadcast); | |
897 | if (r < 0) | |
1f6860d9 | 898 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set request flag for broadcast: %m"); |
3c9b8860 TG |
899 | |
900 | if (link->mtu) { | |
901 | r = sd_dhcp_client_set_mtu(link->dhcp_client, link->mtu); | |
902 | if (r < 0) | |
1f6860d9 | 903 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set MTU: %m"); |
3c9b8860 TG |
904 | } |
905 | ||
27cb34f5 | 906 | if (link->network->dhcp_use_mtu) { |
39745a5a | 907 | r = sd_dhcp_client_set_request_option(link->dhcp_client, |
22805d92 | 908 | SD_DHCP_OPTION_INTERFACE_MTU); |
39745a5a | 909 | if (r < 0) |
1f6860d9 | 910 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set request flag for MTU: %m"); |
3c9b8860 TG |
911 | } |
912 | ||
5e77a146 | 913 | /* NOTE: even if this variable is called "use", it also "sends" PRL |
914 | * options, maybe there should be a different configuration variable | |
915 | * to send or not route options?. */ | |
28522b0d | 916 | /* NOTE: when using Anonymize=yes, routes PRL options are sent |
917 | * by default, so they don't need to be added here. */ | |
5e77a146 | 918 | if (link->network->dhcp_use_routes && !link->network->dhcp_anonymize) { |
3c9b8860 | 919 | r = sd_dhcp_client_set_request_option(link->dhcp_client, |
22805d92 | 920 | SD_DHCP_OPTION_STATIC_ROUTE); |
3c9b8860 | 921 | if (r < 0) |
1f6860d9 YW |
922 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set request flag for static route: %m"); |
923 | ||
3c9b8860 | 924 | r = sd_dhcp_client_set_request_option(link->dhcp_client, |
22805d92 | 925 | SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE); |
7d6884b6 | 926 | if (r < 0) |
1f6860d9 | 927 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set request flag for classless static route: %m"); |
3c9b8860 TG |
928 | } |
929 | ||
ead36ce6 | 930 | if (link->network->dhcp_use_ntp) { |
931 | r = sd_dhcp_client_set_request_option(link->dhcp_client, SD_DHCP_OPTION_NTP_SERVER); | |
932 | if (r < 0) | |
1f6860d9 | 933 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set request flag for NTP server: %m"); |
ead36ce6 | 934 | } |
4b7b5abb | 935 | |
89573b37 | 936 | if (link->network->dhcp_use_timezone) { |
937 | r = sd_dhcp_client_set_request_option(link->dhcp_client, SD_DHCP_OPTION_NEW_TZDB_TIMEZONE); | |
938 | if (r < 0) | |
1f6860d9 | 939 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set request flag for timezone: %m"); |
89573b37 | 940 | } |
8eb9058d | 941 | |
7192bb81 LP |
942 | r = dhcp4_set_hostname(link); |
943 | if (r < 0) | |
a8494759 | 944 | return r; |
3c9b8860 TG |
945 | |
946 | if (link->network->dhcp_vendor_class_identifier) { | |
947 | r = sd_dhcp_client_set_vendor_class_identifier(link->dhcp_client, | |
948 | link->network->dhcp_vendor_class_identifier); | |
949 | if (r < 0) | |
1f6860d9 | 950 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set vendor class identifier: %m"); |
3c9b8860 TG |
951 | } |
952 | ||
af1c0de0 SS |
953 | if (link->network->dhcp_user_class) { |
954 | r = sd_dhcp_client_set_user_class(link->dhcp_client, (const char **) link->network->dhcp_user_class); | |
955 | if (r < 0) | |
1f6860d9 | 956 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set user class: %m"); |
af1c0de0 SS |
957 | } |
958 | ||
9faed222 SS |
959 | if (link->network->dhcp_client_port) { |
960 | r = sd_dhcp_client_set_client_port(link->dhcp_client, link->network->dhcp_client_port); | |
961 | if (r < 0) | |
1f6860d9 | 962 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set listen port: %m"); |
9faed222 SS |
963 | } |
964 | ||
715cedfb SS |
965 | if (link->network->dhcp_max_attempts > 0) { |
966 | r = sd_dhcp_client_set_max_attempts(link->dhcp_client, link->network->dhcp_max_attempts); | |
967 | if (r < 0) | |
968 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set max attempts: %m"); | |
969 | } | |
970 | ||
fff1f40c | 971 | return dhcp4_set_client_identifier(link); |
3c9b8860 | 972 | } |