]>
Commit | Line | Data |
---|---|---|
53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
3c9b8860 | 2 | |
9aa5d8ba | 3 | #include <netinet/in.h> |
3c9b8860 | 4 | #include <linux/if.h> |
8f815e8b | 5 | #include <linux/if_arp.h> |
3c9b8860 | 6 | |
b5efdb8a | 7 | #include "alloc-util.h" |
cb29c156 | 8 | #include "dhcp-client-internal.h" |
958b66ea | 9 | #include "hostname-util.h" |
64b21ece | 10 | #include "parse-util.h" |
3c9b8860 | 11 | #include "network-internal.h" |
ca5ad760 | 12 | #include "networkd-dhcp4.h" |
23f53b99 TG |
13 | #include "networkd-link.h" |
14 | #include "networkd-manager.h" | |
15 | #include "networkd-network.h" | |
ca5ad760 | 16 | #include "string-table.h" |
64b21ece MV |
17 | #include "string-util.h" |
18 | #include "sysctl-util.h" | |
3c9b8860 | 19 | |
d4c52ee5 YW |
20 | static int dhcp_remove_routes(Link *link, sd_dhcp_lease *lease, const struct in_addr *address, bool remove_all); |
21 | static int dhcp_remove_router(Link *link, sd_dhcp_lease *lease, const struct in_addr *address, bool remove_all); | |
854a1ccf | 22 | static int dhcp_remove_dns_routes(Link *link, sd_dhcp_lease *lease, const struct in_addr *address, bool remove_all); |
dd9b10c8 YW |
23 | static int dhcp_remove_address(Link *link, sd_dhcp_lease *lease, const struct in_addr *address, link_netlink_message_handler_t callback); |
24 | static int dhcp_remove_address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link); | |
25 | static int dhcp_lease_renew(sd_dhcp_client *client, Link *link); | |
d03073dd YW |
26 | |
27 | void dhcp4_release_old_lease(Link *link) { | |
d4c52ee5 | 28 | struct in_addr address = {}, address_old = {}; |
d03073dd YW |
29 | |
30 | assert(link); | |
31 | ||
32 | if (!link->dhcp_lease_old) | |
33 | return; | |
34 | ||
35 | assert(link->dhcp_lease); | |
36 | ||
d4c52ee5 YW |
37 | (void) sd_dhcp_lease_get_address(link->dhcp_lease_old, &address_old); |
38 | (void) sd_dhcp_lease_get_address(link->dhcp_lease, &address); | |
d03073dd | 39 | |
d4c52ee5 YW |
40 | (void) dhcp_remove_routes(link, link->dhcp_lease_old, &address_old, false); |
41 | (void) dhcp_remove_router(link, link->dhcp_lease_old, &address_old, false); | |
854a1ccf | 42 | (void) dhcp_remove_dns_routes(link, link->dhcp_lease_old, &address_old, false); |
d03073dd | 43 | |
d4c52ee5 | 44 | if (!in4_addr_equal(&address_old, &address)) |
dd9b10c8 | 45 | (void) dhcp_remove_address(link, link->dhcp_lease_old, &address_old, NULL); |
d03073dd YW |
46 | |
47 | link->dhcp_lease_old = sd_dhcp_lease_unref(link->dhcp_lease_old); | |
48 | link_dirty(link); | |
49 | } | |
50 | ||
302a796f | 51 | static int dhcp4_route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
3c9b8860 TG |
52 | int r; |
53 | ||
54 | assert(link); | |
6cf4a01c | 55 | assert(link->dhcp4_messages > 0); |
3c9b8860 | 56 | |
313cefa1 | 57 | link->dhcp4_messages--; |
3c9b8860 | 58 | |
3ab7ed3f YW |
59 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
60 | return 1; | |
61 | ||
1c4baffc | 62 | r = sd_netlink_message_get_errno(m); |
dd9b10c8 YW |
63 | if (r == -ENETUNREACH && !link->dhcp4_route_retrying) { |
64 | ||
65 | /* It seems kernel does not support that the prefix route cannot be configured with | |
66 | * route table. Let's once drop the config and reconfigure them later. */ | |
67 | ||
5ecb131d | 68 | log_link_message_debug_errno(link, m, r, "Could not set DHCPv4 route, retrying later: %m"); |
dd9b10c8 YW |
69 | link->dhcp4_route_failed = true; |
70 | link->manager->dhcp4_prefix_root_cannot_set_table = true; | |
71 | } else if (r < 0 && r != -EEXIST) { | |
5ecb131d | 72 | log_link_message_warning_errno(link, m, r, "Could not set DHCPv4 route: %m"); |
3c9b8860 | 73 | link_enter_failed(link); |
3ab7ed3f | 74 | return 1; |
3c9b8860 TG |
75 | } |
76 | ||
6cf4a01c | 77 | if (link->dhcp4_messages == 0) { |
dd9b10c8 YW |
78 | if (link->dhcp4_route_failed) { |
79 | struct in_addr address = {}; | |
80 | ||
81 | link->dhcp4_route_failed = false; | |
82 | link->dhcp4_route_retrying = true; | |
83 | ||
84 | (void) sd_dhcp_lease_get_address(link->dhcp_lease, &address); | |
85 | (void) dhcp_remove_routes(link, link->dhcp_lease, &address, true); | |
86 | (void) dhcp_remove_router(link, link->dhcp_lease, &address, true); | |
87 | (void) dhcp_remove_dns_routes(link, link->dhcp_lease, &address, true); | |
88 | (void) dhcp_remove_address(link, link->dhcp_lease, &address, dhcp_remove_address_handler); | |
89 | ||
90 | return 1; | |
91 | } | |
3c9b8860 | 92 | link->dhcp4_configured = true; |
d03073dd YW |
93 | /* New address and routes are configured now. Let's release old lease. */ |
94 | dhcp4_release_old_lease(link); | |
8012cd39 | 95 | link_check_ready(link); |
3c9b8860 TG |
96 | } |
97 | ||
98 | return 1; | |
99 | } | |
100 | ||
d6eac9bd DW |
101 | static int route_scope_from_address(const Route *route, const struct in_addr *self_addr) { |
102 | assert(route); | |
103 | assert(self_addr); | |
104 | ||
7ed5420a YW |
105 | if (in4_addr_is_localhost(&route->dst.in) || |
106 | (!in4_addr_is_null(self_addr) && in4_addr_equal(&route->dst.in, self_addr))) | |
d6eac9bd DW |
107 | return RT_SCOPE_HOST; |
108 | else if (in4_addr_is_null(&route->gw.in)) | |
109 | return RT_SCOPE_LINK; | |
110 | else | |
111 | return RT_SCOPE_UNIVERSE; | |
112 | } | |
113 | ||
156ddf8d YW |
114 | static bool link_noprefixroute(Link *link) { |
115 | return link->network->dhcp_route_table_set && | |
dd9b10c8 YW |
116 | link->network->dhcp_route_table != RT_TABLE_MAIN && |
117 | !link->manager->dhcp4_prefix_root_cannot_set_table; | |
156ddf8d YW |
118 | } |
119 | ||
d4c52ee5 YW |
120 | static int dhcp_route_configure(Route **route, Link *link) { |
121 | int r; | |
122 | ||
123 | assert(route); | |
124 | assert(*route); | |
125 | assert(link); | |
126 | ||
127 | if (set_contains(link->dhcp_routes, *route)) | |
128 | return 0; | |
129 | ||
130 | r = route_configure(*route, link, dhcp4_route_handler); | |
131 | if (r <= 0) | |
132 | return r; | |
133 | ||
134 | link->dhcp4_messages++; | |
135 | ||
136 | r = set_put(link->dhcp_routes, *route); | |
137 | if (r < 0) | |
138 | return r; | |
139 | ||
140 | TAKE_PTR(*route); | |
141 | return 0; | |
142 | } | |
143 | ||
854a1ccf YW |
144 | static int link_set_dns_routes(Link *link, const struct in_addr *address) { |
145 | const struct in_addr *dns; | |
146 | uint32_t table; | |
147 | int i, n, r; | |
148 | ||
149 | assert(link); | |
150 | assert(link->dhcp_lease); | |
151 | assert(link->network); | |
152 | ||
a24e12f0 YW |
153 | if (!link->network->dhcp_use_dns || |
154 | !link->network->dhcp_routes_to_dns) | |
854a1ccf YW |
155 | return 0; |
156 | ||
157 | n = sd_dhcp_lease_get_dns(link->dhcp_lease, &dns); | |
158 | if (IN_SET(n, 0, -ENODATA)) | |
159 | return 0; | |
160 | if (n < 0) | |
161 | return log_link_warning_errno(link, n, "DHCP error: could not get DNS servers: %m"); | |
162 | ||
163 | table = link_get_dhcp_route_table(link); | |
164 | ||
165 | for (i = 0; i < n; i ++) { | |
166 | _cleanup_(route_freep) Route *route = NULL; | |
167 | ||
168 | r = route_new(&route); | |
169 | if (r < 0) | |
170 | return log_link_error_errno(link, r, "Could not allocate route: %m"); | |
171 | ||
172 | /* Set routes to DNS servers. */ | |
173 | ||
174 | route->family = AF_INET; | |
175 | route->dst.in = dns[i]; | |
176 | route->dst_prefixlen = 32; | |
177 | route->prefsrc.in = *address; | |
178 | route->scope = RT_SCOPE_LINK; | |
179 | route->protocol = RTPROT_DHCP; | |
180 | route->priority = link->network->dhcp_route_metric; | |
181 | route->table = table; | |
182 | ||
183 | r = dhcp_route_configure(&route, link); | |
184 | if (r < 0) | |
185 | return log_link_error_errno(link, r, "Could not set route to DNS server: %m"); | |
186 | } | |
187 | ||
188 | return 0; | |
189 | } | |
190 | ||
e723fbd7 ZJS |
191 | static int dhcp_prefix_route_from_lease( |
192 | const sd_dhcp_lease *lease, | |
193 | uint32_t table, | |
194 | const struct in_addr *address, | |
195 | Route **ret_route) { | |
196 | ||
197 | Route *route; | |
198 | struct in_addr netmask; | |
199 | int r; | |
200 | ||
201 | r = sd_dhcp_lease_get_netmask((sd_dhcp_lease*) lease, &netmask); | |
202 | if (r < 0) | |
203 | return r; | |
204 | ||
205 | r = route_new(&route); | |
206 | if (r < 0) | |
207 | return r; | |
208 | ||
209 | route->family = AF_INET; | |
210 | route->dst.in.s_addr = address->s_addr & netmask.s_addr; | |
211 | route->dst_prefixlen = in4_addr_netmask_to_prefixlen(&netmask); | |
212 | route->prefsrc.in = *address; | |
213 | route->scope = RT_SCOPE_LINK; | |
214 | route->protocol = RTPROT_DHCP; | |
215 | route->table = table; | |
216 | *ret_route = route; | |
217 | return 0; | |
218 | } | |
219 | ||
3c9b8860 | 220 | static int link_set_dhcp_routes(Link *link) { |
f8693fc7 | 221 | _cleanup_free_ sd_dhcp_route **static_routes = NULL; |
8cdc46e7 | 222 | bool classless_route = false, static_route = false; |
f8862395 TH |
223 | const struct in_addr *router; |
224 | struct in_addr address; | |
3c9b8860 | 225 | int r, n, i; |
fc1ba79d | 226 | uint32_t table; |
3c9b8860 TG |
227 | |
228 | assert(link); | |
0c9b15a3 AJ |
229 | |
230 | if (!link->dhcp_lease) /* link went down while we configured the IP addresses? */ | |
231 | return 0; | |
232 | ||
233 | if (!link->network) /* link went down while we configured the IP addresses? */ | |
234 | return 0; | |
964b26fe SS |
235 | |
236 | if (!link->network->dhcp_use_routes) | |
237 | return 0; | |
3c9b8860 | 238 | |
4e2ef9d9 YW |
239 | if (!link_has_carrier(link) && !link->network->configure_without_carrier) |
240 | /* During configuring addresses, the link lost its carrier. As networkd is dropping | |
241 | * the addresses now, let's not configure the routes either. */ | |
242 | return 0; | |
243 | ||
c077a205 | 244 | r = set_ensure_allocated(&link->dhcp_routes, &route_hash_ops); |
d4c52ee5 YW |
245 | if (r < 0) |
246 | return log_oom(); | |
247 | ||
248 | /* Clear old entries in case the set was already allocated */ | |
249 | set_clear(link->dhcp_routes); | |
250 | ||
bdb9f580 | 251 | table = link_get_dhcp_route_table(link); |
fc1ba79d | 252 | |
b23aec0d DW |
253 | r = sd_dhcp_lease_get_address(link->dhcp_lease, &address); |
254 | if (r < 0) | |
255 | return log_link_warning_errno(link, r, "DHCP error: could not get address: %m"); | |
256 | ||
156ddf8d YW |
257 | if (link_noprefixroute(link)) { |
258 | _cleanup_(route_freep) Route *prefix_route = NULL; | |
156ddf8d | 259 | |
e723fbd7 | 260 | r = dhcp_prefix_route_from_lease(link->dhcp_lease, table, &address, &prefix_route); |
156ddf8d | 261 | if (r < 0) |
e723fbd7 | 262 | return log_link_error_errno(link, r, "Could not create prefix route: %m"); |
156ddf8d YW |
263 | |
264 | r = dhcp_route_configure(&prefix_route, link); | |
265 | if (r < 0) | |
266 | return log_link_error_errno(link, r, "Could not set prefix route: %m"); | |
267 | } | |
268 | ||
5f04a209 | 269 | n = sd_dhcp_lease_get_routes(link->dhcp_lease, &static_routes); |
599c44e6 YW |
270 | if (n == -ENODATA) |
271 | log_link_debug_errno(link, n, "DHCP: No routes received from DHCP server: %m"); | |
272 | else if (n < 0) | |
61cda4d7 | 273 | log_link_debug_errno(link, n, "DHCP: could not get routes: %m"); |
5f04a209 | 274 | |
8cdc46e7 | 275 | for (i = 0; i < n; i++) { |
3476951c TH |
276 | switch (sd_dhcp_route_get_option(static_routes[i])) { |
277 | case SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE: | |
8cdc46e7 | 278 | classless_route = true; |
3476951c TH |
279 | break; |
280 | case SD_DHCP_OPTION_STATIC_ROUTE: | |
8cdc46e7 | 281 | static_route = true; |
3476951c TH |
282 | break; |
283 | } | |
8cdc46e7 SS |
284 | } |
285 | ||
5f04a209 | 286 | for (i = 0; i < n; i++) { |
8e766630 | 287 | _cleanup_(route_freep) Route *route = NULL; |
5f04a209 | 288 | |
8cdc46e7 SS |
289 | /* if the DHCP server returns both a Classless Static Routes option and a Static Routes option, |
290 | the DHCP client MUST ignore the Static Routes option. */ | |
3476951c TH |
291 | if (classless_route && |
292 | sd_dhcp_route_get_option(static_routes[i]) != SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE) | |
8cdc46e7 SS |
293 | continue; |
294 | ||
5f04a209 SS |
295 | r = route_new(&route); |
296 | if (r < 0) | |
297 | return log_link_error_errno(link, r, "Could not allocate route: %m"); | |
298 | ||
299 | route->family = AF_INET; | |
300 | route->protocol = RTPROT_DHCP; | |
301 | assert_se(sd_dhcp_route_get_gateway(static_routes[i], &route->gw.in) >= 0); | |
302 | assert_se(sd_dhcp_route_get_destination(static_routes[i], &route->dst.in) >= 0); | |
303 | assert_se(sd_dhcp_route_get_destination_prefix_length(static_routes[i], &route->dst_prefixlen) >= 0); | |
304 | route->priority = link->network->dhcp_route_metric; | |
305 | route->table = table; | |
306 | route->scope = route_scope_from_address(route, &address); | |
ac2dce5f DS |
307 | if (IN_SET(route->scope, RT_SCOPE_LINK, RT_SCOPE_UNIVERSE)) |
308 | route->prefsrc.in = address; | |
5f04a209 | 309 | |
d4c52ee5 YW |
310 | if (set_contains(link->dhcp_routes, route)) |
311 | continue; | |
312 | ||
313 | r = dhcp_route_configure(&route, link); | |
5f04a209 | 314 | if (r < 0) |
d4c52ee5 | 315 | return log_link_error_errno(link, r, "Could not set route: %m"); |
5f04a209 SS |
316 | } |
317 | ||
f8862395 | 318 | r = sd_dhcp_lease_get_router(link->dhcp_lease, &router); |
825ace96 YW |
319 | if (IN_SET(r, 0, -ENODATA)) |
320 | log_link_info(link, "DHCP: No gateway received from DHCP server."); | |
321 | else if (r < 0) | |
444b0170 | 322 | log_link_warning_errno(link, r, "DHCP error: could not get gateway: %m"); |
825ace96 YW |
323 | else if (in4_addr_is_null(&router[0])) |
324 | log_link_info(link, "DHCP: Received gateway is null."); | |
f6b8196f | 325 | |
5f04a209 SS |
326 | /* According to RFC 3442: If the DHCP server returns both a Classless Static Routes option and |
327 | a Router option, the DHCP client MUST ignore the Router option. */ | |
8cdc46e7 SS |
328 | if (classless_route && static_route) |
329 | log_link_warning(link, "Classless static routes received from DHCP server: ignoring static-route option and router option"); | |
330 | ||
f8862395 | 331 | if (r > 0 && !classless_route && !in4_addr_is_null(&router[0])) { |
860e636c | 332 | _cleanup_(route_freep) Route *route = NULL, *route_gw = NULL; |
ed9e361a TG |
333 | |
334 | r = route_new(&route_gw); | |
f6b8196f LP |
335 | if (r < 0) |
336 | return log_link_error_errno(link, r, "Could not allocate route: %m"); | |
3c9b8860 TG |
337 | |
338 | /* The dhcp netmask may mask out the gateway. Add an explicit | |
339 | * route for the gw host so that we can route no matter the | |
340 | * netmask or existing kernel route tables. */ | |
341 | route_gw->family = AF_INET; | |
f8862395 | 342 | route_gw->dst.in = router[0]; |
3c9b8860 | 343 | route_gw->dst_prefixlen = 32; |
2ce40956 | 344 | route_gw->prefsrc.in = address; |
3c9b8860 | 345 | route_gw->scope = RT_SCOPE_LINK; |
ed9e361a | 346 | route_gw->protocol = RTPROT_DHCP; |
86655331 | 347 | route_gw->priority = link->network->dhcp_route_metric; |
fc1ba79d | 348 | route_gw->table = table; |
3c9b8860 | 349 | |
d4c52ee5 | 350 | r = dhcp_route_configure(&route_gw, link); |
f6b8196f | 351 | if (r < 0) |
1590dfa4 | 352 | return log_link_error_errno(link, r, "Could not set host route: %m"); |
3c9b8860 | 353 | |
860e636c YW |
354 | r = route_new(&route); |
355 | if (r < 0) | |
356 | return log_link_error_errno(link, r, "Could not allocate route: %m"); | |
357 | ||
3c9b8860 | 358 | route->family = AF_INET; |
f8862395 | 359 | route->gw.in = router[0]; |
2ce40956 | 360 | route->prefsrc.in = address; |
860e636c | 361 | route->protocol = RTPROT_DHCP; |
86655331 | 362 | route->priority = link->network->dhcp_route_metric; |
fc1ba79d | 363 | route->table = table; |
3c9b8860 | 364 | |
d4c52ee5 | 365 | r = dhcp_route_configure(&route, link); |
1590dfa4 | 366 | if (r < 0) |
d4c52ee5 | 367 | return log_link_error_errno(link, r, "Could not set router: %m"); |
3c9b8860 TG |
368 | } |
369 | ||
854a1ccf | 370 | return link_set_dns_routes(link, &address); |
3c9b8860 TG |
371 | } |
372 | ||
d4c52ee5 YW |
373 | static int dhcp_remove_routes(Link *link, sd_dhcp_lease *lease, const struct in_addr *address, bool remove_all) { |
374 | _cleanup_free_ sd_dhcp_route **routes = NULL; | |
7fa472f9 | 375 | uint32_t table; |
d4c52ee5 | 376 | int n, i, r; |
3c9b8860 TG |
377 | |
378 | assert(link); | |
7fa472f9 | 379 | assert(address); |
3c9b8860 | 380 | |
7fa472f9 YW |
381 | if (!link->network->dhcp_use_routes) |
382 | return 0; | |
3c9b8860 | 383 | |
d03073dd YW |
384 | n = sd_dhcp_lease_get_routes(lease, &routes); |
385 | if (IN_SET(n, 0, -ENODATA)) | |
7fa472f9 | 386 | return 0; |
d03073dd YW |
387 | else if (n < 0) |
388 | return log_link_error_errno(link, n, "DHCP error: Failed to get routes: %m"); | |
389 | ||
7fa472f9 | 390 | table = link_get_dhcp_route_table(link); |
8df8ce78 | 391 | |
7fa472f9 YW |
392 | for (i = 0; i < n; i++) { |
393 | _cleanup_(route_freep) Route *route = NULL; | |
3c9b8860 | 394 | |
7fa472f9 YW |
395 | r = route_new(&route); |
396 | if (r < 0) | |
397 | return log_oom(); | |
398 | ||
399 | route->family = AF_INET; | |
400 | assert_se(sd_dhcp_route_get_gateway(routes[i], &route->gw.in) >= 0); | |
401 | assert_se(sd_dhcp_route_get_destination(routes[i], &route->dst.in) >= 0); | |
402 | assert_se(sd_dhcp_route_get_destination_prefix_length(routes[i], &route->dst_prefixlen) >= 0); | |
403 | route->priority = link->network->dhcp_route_metric; | |
404 | route->table = table; | |
405 | route->scope = route_scope_from_address(route, address); | |
ac2dce5f DS |
406 | if (IN_SET(route->scope, RT_SCOPE_LINK, RT_SCOPE_UNIVERSE)) |
407 | route->prefsrc.in = *address; | |
7fa472f9 | 408 | |
d4c52ee5 | 409 | if (!remove_all && set_contains(link->dhcp_routes, route)) |
d03073dd YW |
410 | continue; |
411 | ||
7fa472f9 | 412 | (void) route_remove(route, link, NULL); |
b5799eeb | 413 | } |
3c9b8860 | 414 | |
7fa472f9 YW |
415 | return n; |
416 | } | |
8df8ce78 | 417 | |
d4c52ee5 | 418 | static int dhcp_remove_router(Link *link, sd_dhcp_lease *lease, const struct in_addr *address, bool remove_all) { |
7fa472f9 YW |
419 | _cleanup_(route_freep) Route *route_gw = NULL, *route = NULL; |
420 | const struct in_addr *router; | |
421 | uint32_t table; | |
422 | int r; | |
8df8ce78 | 423 | |
7fa472f9 YW |
424 | assert(link); |
425 | assert(address); | |
3c9b8860 | 426 | |
7fa472f9 YW |
427 | if (!link->network->dhcp_use_routes) |
428 | return 0; | |
3c9b8860 | 429 | |
d03073dd | 430 | r = sd_dhcp_lease_get_router(lease, &router); |
7fa472f9 YW |
431 | if (IN_SET(r, 0, -ENODATA)) { |
432 | log_link_debug(link, "DHCP: No gateway received from DHCP server."); | |
433 | return 0; | |
434 | } else if (r < 0) | |
435 | return log_link_error_errno(link, r, "DHCP error: could not get gateway: %m"); | |
436 | else if (in4_addr_is_null(&router[0])) { | |
437 | log_link_info(link, "DHCP: Received gateway is null, ignoring."); | |
438 | return 0; | |
3c9b8860 TG |
439 | } |
440 | ||
7fa472f9 | 441 | table = link_get_dhcp_route_table(link); |
3c9b8860 | 442 | |
7fa472f9 YW |
443 | r = route_new(&route_gw); |
444 | if (r < 0) | |
445 | return log_oom(); | |
3c9b8860 | 446 | |
7fa472f9 YW |
447 | route_gw->family = AF_INET; |
448 | route_gw->dst.in = router[0]; | |
449 | route_gw->dst_prefixlen = 32; | |
450 | route_gw->prefsrc.in = *address; | |
451 | route_gw->scope = RT_SCOPE_LINK; | |
452 | route_gw->protocol = RTPROT_DHCP; | |
453 | route_gw->priority = link->network->dhcp_route_metric; | |
454 | route_gw->table = table; | |
a7d0ef44 | 455 | |
d4c52ee5 YW |
456 | if (remove_all || !set_contains(link->dhcp_routes, route_gw)) |
457 | (void) route_remove(route_gw, link, NULL); | |
7fa472f9 YW |
458 | |
459 | r = route_new(&route); | |
460 | if (r < 0) | |
461 | return log_oom(); | |
462 | ||
463 | route->family = AF_INET; | |
464 | route->gw.in = router[0]; | |
465 | route->prefsrc.in = *address; | |
466 | route->protocol = RTPROT_DHCP; | |
467 | route->priority = link->network->dhcp_route_metric; | |
468 | route->table = table; | |
469 | ||
d4c52ee5 YW |
470 | if (remove_all || !set_contains(link->dhcp_routes, route)) |
471 | (void) route_remove(route, link, NULL); | |
7fa472f9 YW |
472 | |
473 | return 0; | |
474 | } | |
475 | ||
854a1ccf YW |
476 | static int dhcp_remove_dns_routes(Link *link, sd_dhcp_lease *lease, const struct in_addr *address, bool remove_all) { |
477 | const struct in_addr *dns; | |
478 | uint32_t table; | |
479 | int i, n, r; | |
480 | ||
481 | assert(link); | |
482 | assert(lease); | |
483 | assert(link->network); | |
484 | ||
a24e12f0 YW |
485 | if (!link->network->dhcp_use_dns || |
486 | !link->network->dhcp_routes_to_dns) | |
854a1ccf YW |
487 | return 0; |
488 | ||
489 | n = sd_dhcp_lease_get_dns(lease, &dns); | |
490 | if (IN_SET(n, 0, -ENODATA)) | |
491 | return 0; | |
492 | if (n < 0) | |
493 | return log_link_warning_errno(link, n, "DHCP error: could not get DNS servers: %m"); | |
494 | ||
495 | table = link_get_dhcp_route_table(link); | |
496 | ||
497 | for (i = 0; i < n; i ++) { | |
498 | _cleanup_(route_freep) Route *route = NULL; | |
499 | ||
500 | r = route_new(&route); | |
501 | if (r < 0) | |
502 | return log_link_error_errno(link, r, "Could not allocate route: %m"); | |
503 | ||
504 | route->family = AF_INET; | |
505 | route->dst.in = dns[i]; | |
506 | route->dst_prefixlen = 32; | |
507 | route->prefsrc.in = *address; | |
508 | route->scope = RT_SCOPE_LINK; | |
509 | route->protocol = RTPROT_DHCP; | |
510 | route->priority = link->network->dhcp_route_metric; | |
511 | route->table = table; | |
512 | ||
513 | if (!remove_all && set_contains(link->dhcp_routes, route)) | |
514 | continue; | |
515 | ||
516 | (void) route_remove(route, link, NULL); | |
517 | } | |
518 | ||
156ddf8d YW |
519 | if (link_noprefixroute(link)) { |
520 | _cleanup_(route_freep) Route *prefix_route = NULL; | |
156ddf8d | 521 | |
e723fbd7 | 522 | r = dhcp_prefix_route_from_lease(lease, table, address, &prefix_route); |
156ddf8d | 523 | if (r < 0) |
e723fbd7 | 524 | return log_link_warning_errno(link, r, "Could not delete prefix route: %m"); |
156ddf8d YW |
525 | |
526 | if (remove_all || !set_contains(link->dhcp_routes, prefix_route)) | |
527 | (void) route_remove(prefix_route, link, NULL); | |
528 | } | |
529 | ||
854a1ccf YW |
530 | return 0; |
531 | } | |
532 | ||
dd9b10c8 YW |
533 | static int dhcp_remove_address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
534 | int r; | |
535 | ||
536 | assert(link); | |
537 | ||
538 | /* This is only used when retrying to assign the address received from DHCPv4 server. | |
539 | * See dhcp4_route_handler(). */ | |
540 | ||
541 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
542 | return 1; | |
543 | ||
544 | r = sd_netlink_message_get_errno(m); | |
545 | if (r < 0) | |
5ecb131d | 546 | log_link_message_warning_errno(link, m, r, "Failed to remove DHCPv4 address, ignoring"); |
dd9b10c8 YW |
547 | else |
548 | (void) manager_rtnl_process_address(rtnl, m, link->manager); | |
549 | ||
550 | (void) dhcp_lease_renew(link->dhcp_client, link); | |
551 | return 1; | |
552 | } | |
553 | ||
554 | static int dhcp_remove_address( | |
555 | Link *link, sd_dhcp_lease *lease, | |
556 | const struct in_addr *address, | |
557 | link_netlink_message_handler_t callback) { | |
558 | ||
7fa472f9 YW |
559 | _cleanup_(address_freep) Address *a = NULL; |
560 | struct in_addr netmask; | |
561 | int r; | |
562 | ||
563 | assert(link); | |
564 | assert(address); | |
565 | ||
566 | if (in4_addr_is_null(address)) | |
567 | return 0; | |
568 | ||
569 | r = address_new(&a); | |
570 | if (r < 0) | |
571 | return log_oom(); | |
572 | ||
573 | a->family = AF_INET; | |
574 | a->in_addr.in = *address; | |
575 | ||
d03073dd | 576 | if (sd_dhcp_lease_get_netmask(lease, &netmask) >= 0) |
7fa472f9 YW |
577 | a->prefixlen = in4_addr_netmask_to_prefixlen(&netmask); |
578 | ||
dd9b10c8 | 579 | (void) address_remove(a, link, callback); |
7fa472f9 YW |
580 | |
581 | return 0; | |
582 | } | |
583 | ||
584 | static int dhcp_reset_mtu(Link *link) { | |
585 | uint16_t mtu; | |
586 | int r; | |
587 | ||
588 | assert(link); | |
589 | ||
590 | if (!link->network->dhcp_use_mtu) | |
591 | return 0; | |
592 | ||
593 | r = sd_dhcp_lease_get_mtu(link->dhcp_lease, &mtu); | |
594 | if (r < 0) | |
595 | return r; | |
596 | ||
597 | if (link->original_mtu == mtu) | |
598 | return 0; | |
599 | ||
600 | r = link_set_mtu(link, link->original_mtu); | |
601 | if (r < 0) { | |
602 | log_link_error_errno(link, r, "DHCP error: could not reset MTU: %m"); | |
603 | link_enter_failed(link); | |
604 | return r; | |
3c9b8860 TG |
605 | } |
606 | ||
7fa472f9 YW |
607 | return 0; |
608 | } | |
609 | ||
610 | static int dhcp_reset_hostname(Link *link) { | |
611 | const char *hostname; | |
612 | int r; | |
613 | ||
614 | assert(link); | |
615 | ||
616 | if (!link->network->dhcp_use_hostname) | |
617 | return 0; | |
618 | ||
619 | hostname = link->network->dhcp_hostname; | |
620 | if (!hostname) | |
621 | (void) sd_dhcp_lease_get_hostname(link->dhcp_lease, &hostname); | |
622 | ||
623 | if (!hostname) | |
624 | return 0; | |
625 | ||
626 | /* If a hostname was set due to the lease, then unset it now. */ | |
627 | r = manager_set_hostname(link->manager, NULL); | |
628 | if (r < 0) | |
629 | return log_link_error_errno(link, r, "DHCP error: Failed to reset transient hostname: %m"); | |
630 | ||
631 | return 0; | |
632 | } | |
633 | ||
634 | static int dhcp_lease_lost(Link *link) { | |
635 | struct in_addr address = {}; | |
636 | ||
637 | assert(link); | |
638 | assert(link->dhcp_lease); | |
639 | ||
f8c2e4b9 | 640 | log_link_info(link, "DHCP lease lost"); |
7fa472f9 YW |
641 | |
642 | link->dhcp4_configured = false; | |
643 | ||
644 | (void) sd_dhcp_lease_get_address(link->dhcp_lease, &address); | |
d4c52ee5 YW |
645 | (void) dhcp_remove_routes(link, link->dhcp_lease, &address, true); |
646 | (void) dhcp_remove_router(link, link->dhcp_lease, &address, true); | |
854a1ccf | 647 | (void) dhcp_remove_dns_routes(link, link->dhcp_lease, &address, true); |
dd9b10c8 | 648 | (void) dhcp_remove_address(link, link->dhcp_lease, &address, NULL); |
7fa472f9 YW |
649 | (void) dhcp_reset_mtu(link); |
650 | (void) dhcp_reset_hostname(link); | |
651 | ||
3c9b8860 | 652 | link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease); |
6a3e5f6a | 653 | link_dirty(link); |
3c9b8860 TG |
654 | |
655 | return 0; | |
656 | } | |
657 | ||
302a796f | 658 | static int dhcp4_address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
3c9b8860 TG |
659 | int r; |
660 | ||
661 | assert(link); | |
662 | ||
3ab7ed3f YW |
663 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
664 | return 1; | |
665 | ||
1c4baffc | 666 | r = sd_netlink_message_get_errno(m); |
3c9b8860 | 667 | if (r < 0 && r != -EEXIST) { |
5ecb131d | 668 | log_link_message_warning_errno(link, m, r, "Could not set DHCPv4 address"); |
3c9b8860 | 669 | link_enter_failed(link); |
3ab7ed3f | 670 | return 1; |
4ff296b0 YW |
671 | } else if (r >= 0) |
672 | (void) manager_rtnl_process_address(rtnl, m, link->manager); | |
3c9b8860 | 673 | |
1590dfa4 YW |
674 | r = link_set_dhcp_routes(link); |
675 | if (r < 0) { | |
676 | link_enter_failed(link); | |
677 | return 1; | |
678 | } | |
3c9b8860 | 679 | |
b5799eeb | 680 | /* Add back static routes since kernel removes while DHCPv4 address is removed from when lease expires */ |
4ff296b0 YW |
681 | r = link_request_set_routes(link); |
682 | if (r < 0) { | |
683 | link_enter_failed(link); | |
684 | return 1; | |
685 | } | |
b5799eeb | 686 | |
223932c7 AH |
687 | if (link->dhcp4_messages == 0) { |
688 | link->dhcp4_configured = true; | |
d03073dd YW |
689 | /* The new address is configured, and no route is requested. |
690 | * Let's drop the old lease. */ | |
691 | dhcp4_release_old_lease(link); | |
223932c7 AH |
692 | link_check_ready(link); |
693 | } | |
694 | ||
3c9b8860 TG |
695 | return 1; |
696 | } | |
697 | ||
698 | static int dhcp4_update_address(Link *link, | |
699 | struct in_addr *address, | |
700 | struct in_addr *netmask, | |
701 | uint32_t lifetime) { | |
8e766630 | 702 | _cleanup_(address_freep) Address *addr = NULL; |
3c9b8860 TG |
703 | unsigned prefixlen; |
704 | int r; | |
705 | ||
706 | assert(address); | |
707 | assert(netmask); | |
708 | assert(lifetime); | |
709 | ||
5a941f5f | 710 | prefixlen = in4_addr_netmask_to_prefixlen(netmask); |
3c9b8860 | 711 | |
f0213e37 | 712 | r = address_new(&addr); |
3c9b8860 TG |
713 | if (r < 0) |
714 | return r; | |
715 | ||
716 | addr->family = AF_INET; | |
717 | addr->in_addr.in.s_addr = address->s_addr; | |
718 | addr->cinfo.ifa_prefered = lifetime; | |
719 | addr->cinfo.ifa_valid = lifetime; | |
720 | addr->prefixlen = prefixlen; | |
721 | addr->broadcast.s_addr = address->s_addr | ~netmask->s_addr; | |
156ddf8d | 722 | addr->prefix_route = link_noprefixroute(link); |
3c9b8860 | 723 | |
66669078 TG |
724 | /* allow reusing an existing address and simply update its lifetime |
725 | * in case it already exists */ | |
483d099e | 726 | r = address_configure(addr, link, dhcp4_address_handler, true); |
3c9b8860 TG |
727 | if (r < 0) |
728 | return r; | |
729 | ||
730 | return 0; | |
731 | } | |
732 | ||
733 | static int dhcp_lease_renew(sd_dhcp_client *client, Link *link) { | |
734 | sd_dhcp_lease *lease; | |
735 | struct in_addr address; | |
736 | struct in_addr netmask; | |
737 | uint32_t lifetime = CACHE_INFO_INFINITY_LIFE_TIME; | |
738 | int r; | |
739 | ||
740 | assert(link); | |
741 | assert(client); | |
742 | assert(link->network); | |
743 | ||
744 | r = sd_dhcp_client_get_lease(client, &lease); | |
f6b8196f LP |
745 | if (r < 0) |
746 | return log_link_warning_errno(link, r, "DHCP error: no lease: %m"); | |
3c9b8860 TG |
747 | |
748 | sd_dhcp_lease_unref(link->dhcp_lease); | |
749 | link->dhcp4_configured = false; | |
e6b18ffa | 750 | link->dhcp_lease = sd_dhcp_lease_ref(lease); |
6a3e5f6a | 751 | link_dirty(link); |
3c9b8860 TG |
752 | |
753 | r = sd_dhcp_lease_get_address(lease, &address); | |
f6b8196f LP |
754 | if (r < 0) |
755 | return log_link_warning_errno(link, r, "DHCP error: no address: %m"); | |
3c9b8860 TG |
756 | |
757 | r = sd_dhcp_lease_get_netmask(lease, &netmask); | |
f6b8196f LP |
758 | if (r < 0) |
759 | return log_link_warning_errno(link, r, "DHCP error: no netmask: %m"); | |
3c9b8860 | 760 | |
7da377ef | 761 | if (!FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP)) { |
f6b8196f LP |
762 | r = sd_dhcp_lease_get_lifetime(link->dhcp_lease, &lifetime); |
763 | if (r < 0) | |
764 | return log_link_warning_errno(link, r, "DHCP error: no lifetime: %m"); | |
3c9b8860 TG |
765 | } |
766 | ||
767 | r = dhcp4_update_address(link, &address, &netmask, lifetime); | |
a2f68490 YW |
768 | if (r < 0) |
769 | return log_link_warning_errno(link, r, "Could not update IP address: %m"); | |
3c9b8860 TG |
770 | |
771 | return 0; | |
772 | } | |
773 | ||
774 | static int dhcp_lease_acquired(sd_dhcp_client *client, Link *link) { | |
f8862395 | 775 | const struct in_addr *router; |
3c9b8860 TG |
776 | sd_dhcp_lease *lease; |
777 | struct in_addr address; | |
778 | struct in_addr netmask; | |
3c9b8860 TG |
779 | unsigned prefixlen; |
780 | uint32_t lifetime = CACHE_INFO_INFINITY_LIFE_TIME; | |
781 | int r; | |
782 | ||
783 | assert(client); | |
784 | assert(link); | |
785 | ||
a20c909c YW |
786 | link->dhcp4_configured = false; |
787 | ||
3c9b8860 | 788 | r = sd_dhcp_client_get_lease(client, &lease); |
f2341e0a | 789 | if (r < 0) |
f6b8196f | 790 | return log_link_error_errno(link, r, "DHCP error: No lease: %m"); |
3c9b8860 TG |
791 | |
792 | r = sd_dhcp_lease_get_address(lease, &address); | |
f2341e0a | 793 | if (r < 0) |
f6b8196f | 794 | return log_link_error_errno(link, r, "DHCP error: No address: %m"); |
3c9b8860 TG |
795 | |
796 | r = sd_dhcp_lease_get_netmask(lease, &netmask); | |
f2341e0a | 797 | if (r < 0) |
f6b8196f | 798 | return log_link_error_errno(link, r, "DHCP error: No netmask: %m"); |
3c9b8860 | 799 | |
5a941f5f | 800 | prefixlen = in4_addr_netmask_to_prefixlen(&netmask); |
3c9b8860 | 801 | |
448aaf9f YW |
802 | if (!FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP)) { |
803 | r = sd_dhcp_lease_get_lifetime(lease, &lifetime); | |
804 | if (r < 0) | |
805 | return log_link_warning_errno(link, r, "DHCP error: no lifetime: %m"); | |
806 | } | |
807 | ||
f8862395 | 808 | r = sd_dhcp_lease_get_router(lease, &router); |
397d15fd | 809 | if (r < 0 && r != -ENODATA) |
f6b8196f | 810 | return log_link_error_errno(link, r, "DHCP error: Could not get gateway: %m"); |
3c9b8860 | 811 | |
f8862395 | 812 | if (r > 0 && !in4_addr_is_null(&router[0])) |
f2341e0a LP |
813 | log_struct(LOG_INFO, |
814 | LOG_LINK_INTERFACE(link), | |
815 | LOG_LINK_MESSAGE(link, "DHCPv4 address %u.%u.%u.%u/%u via %u.%u.%u.%u", | |
816 | ADDRESS_FMT_VAL(address), | |
817 | prefixlen, | |
f8862395 | 818 | ADDRESS_FMT_VAL(router[0])), |
f2341e0a LP |
819 | "ADDRESS=%u.%u.%u.%u", ADDRESS_FMT_VAL(address), |
820 | "PREFIXLEN=%u", prefixlen, | |
f8862395 | 821 | "GATEWAY=%u.%u.%u.%u", ADDRESS_FMT_VAL(router[0])); |
3c9b8860 | 822 | else |
f2341e0a LP |
823 | log_struct(LOG_INFO, |
824 | LOG_LINK_INTERFACE(link), | |
825 | LOG_LINK_MESSAGE(link, "DHCPv4 address %u.%u.%u.%u/%u", | |
826 | ADDRESS_FMT_VAL(address), | |
827 | prefixlen), | |
828 | "ADDRESS=%u.%u.%u.%u", ADDRESS_FMT_VAL(address), | |
a1230ff9 | 829 | "PREFIXLEN=%u", prefixlen); |
3c9b8860 | 830 | |
e6b18ffa | 831 | link->dhcp_lease = sd_dhcp_lease_ref(lease); |
6a3e5f6a | 832 | link_dirty(link); |
3c9b8860 | 833 | |
27cb34f5 | 834 | if (link->network->dhcp_use_mtu) { |
3c9b8860 TG |
835 | uint16_t mtu; |
836 | ||
837 | r = sd_dhcp_lease_get_mtu(lease, &mtu); | |
838 | if (r >= 0) { | |
933c70a0 | 839 | r = link_set_mtu(link, mtu); |
3c9b8860 | 840 | if (r < 0) |
f2341e0a | 841 | log_link_error_errno(link, r, "Failed to set MTU to %" PRIu16 ": %m", mtu); |
3c9b8860 TG |
842 | } |
843 | } | |
844 | ||
27cb34f5 | 845 | if (link->network->dhcp_use_hostname) { |
2de2abad LB |
846 | const char *dhcpname = NULL; |
847 | _cleanup_free_ char *hostname = NULL; | |
3c9b8860 | 848 | |
27cb34f5 | 849 | if (link->network->dhcp_hostname) |
2de2abad | 850 | dhcpname = link->network->dhcp_hostname; |
dce391e7 | 851 | else |
2de2abad LB |
852 | (void) sd_dhcp_lease_get_hostname(lease, &dhcpname); |
853 | ||
854 | if (dhcpname) { | |
855 | r = shorten_overlong(dhcpname, &hostname); | |
856 | if (r < 0) | |
857 | log_link_warning_errno(link, r, "Unable to shorten overlong DHCP hostname '%s', ignoring: %m", dhcpname); | |
858 | if (r == 1) | |
5238e957 | 859 | log_link_notice(link, "Overlong DHCP hostname received, shortened from '%s' to '%s'", dhcpname, hostname); |
2de2abad | 860 | } |
a7d0ef44 | 861 | |
dce391e7 | 862 | if (hostname) { |
59eb33e0 | 863 | r = manager_set_hostname(link->manager, hostname); |
3c9b8860 | 864 | if (r < 0) |
f2341e0a | 865 | log_link_error_errno(link, r, "Failed to set transient hostname to '%s': %m", hostname); |
3c9b8860 TG |
866 | } |
867 | } | |
868 | ||
27cb34f5 | 869 | if (link->network->dhcp_use_timezone) { |
21b80ad1 LP |
870 | const char *tz = NULL; |
871 | ||
872 | (void) sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz); | |
873 | ||
874 | if (tz) { | |
59eb33e0 | 875 | r = manager_set_timezone(link->manager, tz); |
21b80ad1 LP |
876 | if (r < 0) |
877 | log_link_error_errno(link, r, "Failed to set timezone to '%s': %m", tz); | |
878 | } | |
879 | } | |
880 | ||
3c9b8860 | 881 | r = dhcp4_update_address(link, &address, &netmask, lifetime); |
a2f68490 YW |
882 | if (r < 0) |
883 | return log_link_warning_errno(link, r, "Could not update IP address: %m"); | |
3c9b8860 TG |
884 | |
885 | return 0; | |
886 | } | |
8bc17bb3 | 887 | |
d03073dd YW |
888 | static int dhcp_lease_ip_change(sd_dhcp_client *client, Link *link) { |
889 | int r; | |
890 | ||
891 | link->dhcp_lease_old = TAKE_PTR(link->dhcp_lease); | |
892 | ||
893 | /* On ip address change, to keep the connectability, we would like to assign new address and | |
894 | * routes, and then release old lease. There are two possible success paths: | |
895 | * | |
896 | * 1. new address and routes are configured. | |
897 | * -> handled by dhcp_release_old_lease() in dhcp4_route_handler(). | |
898 | * 2. new address is configured and no route is requested. | |
899 | * -> handled by dhcp_release_old_lease() in dhcp4_address_handler(). | |
900 | * | |
901 | * On error in assigning new address and routes, then the link always enters to the failed | |
902 | * state. And link_enter_failed() leads to the DHCP client to be stopped. So, | |
903 | * dhcp_release_old_lease() will be also called by link_stop_clients(). | |
904 | */ | |
905 | ||
906 | r = dhcp_lease_acquired(client, link); | |
907 | if (r < 0) { | |
908 | /* If it fails, then the new address is not configured yet. | |
909 | * So, let's simply drop the old lease. */ | |
910 | sd_dhcp_lease_unref(link->dhcp_lease); | |
911 | link->dhcp_lease = TAKE_PTR(link->dhcp_lease_old); | |
912 | (void) dhcp_lease_lost(link); | |
913 | return r; | |
914 | } | |
915 | ||
916 | return 0; | |
917 | } | |
918 | ||
727b5734 SS |
919 | static int dhcp_server_is_black_listed(Link *link, sd_dhcp_client *client) { |
920 | sd_dhcp_lease *lease; | |
921 | struct in_addr addr; | |
922 | int r; | |
923 | ||
924 | assert(link); | |
925 | assert(link->network); | |
926 | assert(client); | |
927 | ||
928 | r = sd_dhcp_client_get_lease(client, &lease); | |
929 | if (r < 0) | |
930 | return log_link_error_errno(link, r, "Failed to get DHCP lease: %m"); | |
931 | ||
932 | r = sd_dhcp_lease_get_server_identifier(lease, &addr); | |
933 | if (r < 0) | |
934 | return log_link_debug_errno(link, r, "Failed to get DHCP server ip address: %m"); | |
935 | ||
936 | if (set_contains(link->network->dhcp_black_listed_ip, UINT32_TO_PTR(addr.s_addr))) { | |
937 | log_struct(LOG_DEBUG, | |
938 | LOG_LINK_INTERFACE(link), | |
939 | LOG_LINK_MESSAGE(link, "DHCPv4 ip '%u.%u.%u.%u' found in black listed ip addresses, ignoring offer", | |
940 | ADDRESS_FMT_VAL(addr))); | |
941 | return true; | |
942 | } | |
943 | ||
944 | return false; | |
945 | } | |
946 | ||
947 | static int dhcp4_handler(sd_dhcp_client *client, int event, void *userdata) { | |
3c9b8860 | 948 | Link *link = userdata; |
86e2be7b | 949 | int r; |
3c9b8860 TG |
950 | |
951 | assert(link); | |
952 | assert(link->network); | |
953 | assert(link->manager); | |
954 | ||
955 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
727b5734 | 956 | return 0; |
3c9b8860 TG |
957 | |
958 | switch (event) { | |
03748142 | 959 | case SD_DHCP_CLIENT_EVENT_STOP: |
8bc17bb3 | 960 | |
910feb78 | 961 | if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4)) { |
8bc17bb3 SS |
962 | assert(link->ipv4ll); |
963 | ||
964 | log_link_debug(link, "DHCP client is stopped. Acquiring IPv4 link-local address"); | |
965 | ||
966 | r = sd_ipv4ll_start(link->ipv4ll); | |
727b5734 SS |
967 | if (r < 0) |
968 | return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m"); | |
8bc17bb3 SS |
969 | } |
970 | ||
7da377ef | 971 | if (FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP)) { |
efdb62df YW |
972 | log_link_notice(link, "DHCPv4 connection considered critical, ignoring request to reconfigure it."); |
973 | return 0; | |
974 | } | |
975 | ||
efdb62df | 976 | if (link->dhcp_lease) { |
8bea7e70 ZJS |
977 | if (link->network->dhcp_send_release) |
978 | (void) sd_dhcp_client_send_release(client); | |
979 | ||
efdb62df YW |
980 | r = dhcp_lease_lost(link); |
981 | if (r < 0) { | |
982 | link_enter_failed(link); | |
983 | return r; | |
984 | } | |
985 | } | |
986 | ||
987 | break; | |
8bc17bb3 | 988 | case SD_DHCP_CLIENT_EVENT_EXPIRED: |
7da377ef | 989 | if (FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP)) { |
efdb62df | 990 | log_link_notice(link, "DHCPv4 connection considered critical, ignoring request to reconfigure it."); |
727b5734 | 991 | return 0; |
3c9b8860 TG |
992 | } |
993 | ||
994 | if (link->dhcp_lease) { | |
995 | r = dhcp_lease_lost(link); | |
996 | if (r < 0) { | |
997 | link_enter_failed(link); | |
727b5734 | 998 | return r; |
3c9b8860 TG |
999 | } |
1000 | } | |
1001 | ||
d03073dd YW |
1002 | break; |
1003 | case SD_DHCP_CLIENT_EVENT_IP_CHANGE: | |
1004 | if (FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP)) { | |
1005 | log_link_notice(link, "DHCPv4 connection considered critical, ignoring request to reconfigure it."); | |
1006 | return 0; | |
1007 | } | |
1008 | ||
1009 | r = dhcp_lease_ip_change(client, link); | |
1010 | if (r < 0) { | |
1011 | link_enter_failed(link); | |
1012 | return r; | |
3c9b8860 TG |
1013 | } |
1014 | ||
1015 | break; | |
03748142 | 1016 | case SD_DHCP_CLIENT_EVENT_RENEW: |
3c9b8860 TG |
1017 | r = dhcp_lease_renew(client, link); |
1018 | if (r < 0) { | |
1019 | link_enter_failed(link); | |
727b5734 | 1020 | return r; |
3c9b8860 TG |
1021 | } |
1022 | break; | |
03748142 | 1023 | case SD_DHCP_CLIENT_EVENT_IP_ACQUIRE: |
3c9b8860 TG |
1024 | r = dhcp_lease_acquired(client, link); |
1025 | if (r < 0) { | |
1026 | link_enter_failed(link); | |
727b5734 | 1027 | return r; |
3c9b8860 TG |
1028 | } |
1029 | break; | |
727b5734 SS |
1030 | case SD_DHCP_CLIENT_EVENT_SELECTING: |
1031 | r = dhcp_server_is_black_listed(link, client); | |
1032 | if (r < 0) | |
1033 | return r; | |
1034 | if (r != 0) | |
1035 | return -ENOMSG; | |
1036 | break; | |
3c9b8860 TG |
1037 | default: |
1038 | if (event < 0) | |
f6b8196f | 1039 | log_link_warning_errno(link, event, "DHCP error: Client failed: %m"); |
3c9b8860 | 1040 | else |
f6b8196f | 1041 | log_link_warning(link, "DHCP unknown event: %i", event); |
3c9b8860 TG |
1042 | break; |
1043 | } | |
1044 | ||
727b5734 | 1045 | return 0; |
3c9b8860 TG |
1046 | } |
1047 | ||
7192bb81 LP |
1048 | static int dhcp4_set_hostname(Link *link) { |
1049 | _cleanup_free_ char *hostname = NULL; | |
1050 | const char *hn; | |
1051 | int r; | |
1052 | ||
1053 | assert(link); | |
1054 | ||
1055 | if (!link->network->dhcp_send_hostname) | |
1056 | hn = NULL; | |
1057 | else if (link->network->dhcp_hostname) | |
1058 | hn = link->network->dhcp_hostname; | |
1059 | else { | |
1060 | r = gethostname_strict(&hostname); | |
1061 | if (r < 0 && r != -ENXIO) /* ENXIO: no hostname set or hostname is "localhost" */ | |
1062 | return r; | |
1063 | ||
1064 | hn = hostname; | |
1065 | } | |
1066 | ||
a8494759 YW |
1067 | r = sd_dhcp_client_set_hostname(link->dhcp_client, hn); |
1068 | if (r == -EINVAL && hostname) | |
1069 | /* Ignore error when the machine's hostname is not suitable to send in DHCP packet. */ | |
1070 | log_link_warning_errno(link, r, "DHCP4 CLIENT: Failed to set hostname from kernel hostname, ignoring: %m"); | |
1071 | else if (r < 0) | |
1072 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set hostname: %m"); | |
1073 | ||
1074 | return 0; | |
7192bb81 LP |
1075 | } |
1076 | ||
64b21ece | 1077 | static bool promote_secondaries_enabled(const char *ifname) { |
3f550c31 HV |
1078 | _cleanup_free_ char *promote_secondaries_sysctl = NULL; |
1079 | char *promote_secondaries_path; | |
64b21ece MV |
1080 | int r; |
1081 | ||
1082 | promote_secondaries_path = strjoina("net/ipv4/conf/", ifname, "/promote_secondaries"); | |
1083 | r = sysctl_read(promote_secondaries_path, &promote_secondaries_sysctl); | |
1084 | if (r < 0) { | |
1085 | log_debug_errno(r, "Cannot read sysctl %s", promote_secondaries_path); | |
1086 | return false; | |
1087 | } | |
1088 | ||
1089 | truncate_nl(promote_secondaries_sysctl); | |
1090 | r = parse_boolean(promote_secondaries_sysctl); | |
1091 | if (r < 0) | |
1092 | log_warning_errno(r, "Cannot parse sysctl %s with content %s as boolean", promote_secondaries_path, promote_secondaries_sysctl); | |
1093 | return r > 0; | |
1094 | } | |
1095 | ||
1096 | /* dhcp4_set_promote_secondaries will ensure this interface has | |
1097 | * the "promote_secondaries" option in the kernel set. If this sysctl | |
1098 | * is not set DHCP will work only as long as the IP address does not | |
1099 | * changes between leases. The kernel will remove all secondary IP | |
1100 | * addresses of an interface otherwise. The way systemd-network works | |
1101 | * is that the new IP of a lease is added as a secondary IP and when | |
1102 | * the primary one expires it relies on the kernel to promote the | |
1103 | * secondary IP. See also https://github.com/systemd/systemd/issues/7163 | |
1104 | */ | |
1105 | int dhcp4_set_promote_secondaries(Link *link) { | |
1106 | int r; | |
1107 | ||
1108 | assert(link); | |
1109 | assert(link->network); | |
1110 | assert(link->network->dhcp & ADDRESS_FAMILY_IPV4); | |
1111 | ||
1112 | /* check if the kernel has promote_secondaries enabled for our | |
1113 | * interface. If it is not globally enabled or enabled for the | |
1114 | * specific interface we must either enable it. | |
1115 | */ | |
8e1a7253 | 1116 | if (!(promote_secondaries_enabled("all") || promote_secondaries_enabled(link->ifname))) { |
64b21ece MV |
1117 | char *promote_secondaries_path = NULL; |
1118 | ||
1119 | log_link_debug(link, "promote_secondaries is unset, setting it"); | |
1120 | promote_secondaries_path = strjoina("net/ipv4/conf/", link->ifname, "/promote_secondaries"); | |
1121 | r = sysctl_write(promote_secondaries_path, "1"); | |
1122 | if (r < 0) | |
1123 | log_link_warning_errno(link, r, "cannot set sysctl %s to 1", promote_secondaries_path); | |
1124 | return r > 0; | |
1125 | } | |
1126 | ||
1127 | return 0; | |
1128 | } | |
1129 | ||
fff1f40c YW |
1130 | int dhcp4_set_client_identifier(Link *link) { |
1131 | int r; | |
1132 | ||
1133 | assert(link); | |
1134 | assert(link->network); | |
1135 | assert(link->dhcp_client); | |
1136 | ||
1137 | switch (link->network->dhcp_client_identifier) { | |
1138 | case DHCP_CLIENT_ID_DUID: { | |
0cf7c3fd | 1139 | /* If configured, apply user specified DUID and IAID */ |
fff1f40c YW |
1140 | const DUID *duid = link_get_duid(link); |
1141 | ||
0cf7c3fd YW |
1142 | if (duid->type == DUID_TYPE_LLT && duid->raw_data_len == 0) |
1143 | r = sd_dhcp_client_set_iaid_duid_llt(link->dhcp_client, | |
8217ed5e | 1144 | link->network->iaid_set, |
0cf7c3fd YW |
1145 | link->network->iaid, |
1146 | duid->llt_time); | |
1147 | else | |
1148 | r = sd_dhcp_client_set_iaid_duid(link->dhcp_client, | |
8217ed5e | 1149 | link->network->iaid_set, |
0cf7c3fd YW |
1150 | link->network->iaid, |
1151 | duid->type, | |
1152 | duid->raw_data_len > 0 ? duid->raw_data : NULL, | |
1153 | duid->raw_data_len); | |
fff1f40c | 1154 | if (r < 0) |
0cf7c3fd | 1155 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set IAID+DUID: %m"); |
fff1f40c YW |
1156 | break; |
1157 | } | |
1158 | case DHCP_CLIENT_ID_DUID_ONLY: { | |
1159 | /* If configured, apply user specified DUID */ | |
1160 | const DUID *duid = link_get_duid(link); | |
1161 | ||
0cf7c3fd YW |
1162 | if (duid->type == DUID_TYPE_LLT && duid->raw_data_len == 0) |
1163 | r = sd_dhcp_client_set_duid_llt(link->dhcp_client, | |
89b3fa66 | 1164 | duid->llt_time); |
0cf7c3fd YW |
1165 | else |
1166 | r = sd_dhcp_client_set_duid(link->dhcp_client, | |
1167 | duid->type, | |
1168 | duid->raw_data_len > 0 ? duid->raw_data : NULL, | |
1169 | duid->raw_data_len); | |
fff1f40c YW |
1170 | if (r < 0) |
1171 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set DUID: %m"); | |
1172 | break; | |
1173 | } | |
1174 | case DHCP_CLIENT_ID_MAC: | |
1175 | r = sd_dhcp_client_set_client_id(link->dhcp_client, | |
1176 | ARPHRD_ETHER, | |
1177 | (const uint8_t *) &link->mac, | |
1178 | sizeof(link->mac)); | |
1179 | if (r < 0) | |
1180 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set client ID: %m"); | |
1181 | break; | |
1182 | default: | |
1183 | assert_not_reached("Unknown client identifier type."); | |
1184 | } | |
1185 | ||
1186 | return 0; | |
1187 | } | |
1188 | ||
3c9b8860 | 1189 | int dhcp4_configure(Link *link) { |
cb29c156 | 1190 | sd_dhcp_option *send_option; |
5bc945be SS |
1191 | void *request_options; |
1192 | Iterator i; | |
3c9b8860 TG |
1193 | int r; |
1194 | ||
1195 | assert(link); | |
1196 | assert(link->network); | |
e0ee46f2 | 1197 | assert(link->network->dhcp & ADDRESS_FAMILY_IPV4); |
3c9b8860 | 1198 | |
0bc70f1d | 1199 | if (!link->dhcp_client) { |
db3d2358 | 1200 | r = sd_dhcp_client_new(&link->dhcp_client, link->network->dhcp_anonymize); |
1f6860d9 YW |
1201 | if (r == -ENOMEM) |
1202 | return log_oom(); | |
0bc70f1d | 1203 | if (r < 0) |
1f6860d9 | 1204 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to create DHCP4 client: %m"); |
0bc70f1d | 1205 | } |
3c9b8860 TG |
1206 | |
1207 | r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0); | |
1208 | if (r < 0) | |
1f6860d9 | 1209 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to attach event: %m"); |
3c9b8860 | 1210 | |
76253e73 DW |
1211 | r = sd_dhcp_client_set_mac(link->dhcp_client, |
1212 | (const uint8_t *) &link->mac, | |
1213 | sizeof (link->mac), ARPHRD_ETHER); | |
3c9b8860 | 1214 | if (r < 0) |
1f6860d9 | 1215 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set MAC address: %m"); |
3c9b8860 | 1216 | |
2f8e7633 | 1217 | r = sd_dhcp_client_set_ifindex(link->dhcp_client, link->ifindex); |
3c9b8860 | 1218 | if (r < 0) |
1f6860d9 | 1219 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set ifindex: %m"); |
3c9b8860 TG |
1220 | |
1221 | r = sd_dhcp_client_set_callback(link->dhcp_client, dhcp4_handler, link); | |
1222 | if (r < 0) | |
1f6860d9 | 1223 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set callback: %m"); |
3c9b8860 TG |
1224 | |
1225 | r = sd_dhcp_client_set_request_broadcast(link->dhcp_client, | |
1226 | link->network->dhcp_broadcast); | |
1227 | if (r < 0) | |
1f6860d9 | 1228 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set request flag for broadcast: %m"); |
3c9b8860 TG |
1229 | |
1230 | if (link->mtu) { | |
1231 | r = sd_dhcp_client_set_mtu(link->dhcp_client, link->mtu); | |
1232 | if (r < 0) | |
1f6860d9 | 1233 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set MTU: %m"); |
3c9b8860 TG |
1234 | } |
1235 | ||
27cb34f5 | 1236 | if (link->network->dhcp_use_mtu) { |
39745a5a | 1237 | r = sd_dhcp_client_set_request_option(link->dhcp_client, |
22805d92 | 1238 | SD_DHCP_OPTION_INTERFACE_MTU); |
39745a5a | 1239 | if (r < 0) |
1f6860d9 | 1240 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set request flag for MTU: %m"); |
3c9b8860 TG |
1241 | } |
1242 | ||
5e77a146 | 1243 | /* NOTE: even if this variable is called "use", it also "sends" PRL |
1244 | * options, maybe there should be a different configuration variable | |
1245 | * to send or not route options?. */ | |
28522b0d | 1246 | /* NOTE: when using Anonymize=yes, routes PRL options are sent |
1247 | * by default, so they don't need to be added here. */ | |
5e77a146 | 1248 | if (link->network->dhcp_use_routes && !link->network->dhcp_anonymize) { |
3c9b8860 | 1249 | r = sd_dhcp_client_set_request_option(link->dhcp_client, |
22805d92 | 1250 | SD_DHCP_OPTION_STATIC_ROUTE); |
3c9b8860 | 1251 | if (r < 0) |
1f6860d9 YW |
1252 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set request flag for static route: %m"); |
1253 | ||
3c9b8860 | 1254 | r = sd_dhcp_client_set_request_option(link->dhcp_client, |
22805d92 | 1255 | SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE); |
7d6884b6 | 1256 | if (r < 0) |
1f6860d9 | 1257 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set request flag for classless static route: %m"); |
3c9b8860 TG |
1258 | } |
1259 | ||
150d3b8e YW |
1260 | if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO && !link->network->dhcp_anonymize) { |
1261 | r = sd_dhcp_client_set_request_option(link->dhcp_client, SD_DHCP_OPTION_DOMAIN_SEARCH_LIST); | |
1262 | if (r < 0) | |
1263 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set request flag for domain search list: %m"); | |
1264 | } | |
1265 | ||
ead36ce6 | 1266 | if (link->network->dhcp_use_ntp) { |
1267 | r = sd_dhcp_client_set_request_option(link->dhcp_client, SD_DHCP_OPTION_NTP_SERVER); | |
1268 | if (r < 0) | |
1f6860d9 | 1269 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set request flag for NTP server: %m"); |
ead36ce6 | 1270 | } |
4b7b5abb | 1271 | |
299d578f SS |
1272 | if (link->network->dhcp_use_sip) { |
1273 | r = sd_dhcp_client_set_request_option(link->dhcp_client, SD_DHCP_OPTION_SIP_SERVER); | |
1274 | if (r < 0) | |
1275 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set request flag for SIP server: %m"); | |
1276 | } | |
1277 | ||
89573b37 | 1278 | if (link->network->dhcp_use_timezone) { |
1279 | r = sd_dhcp_client_set_request_option(link->dhcp_client, SD_DHCP_OPTION_NEW_TZDB_TIMEZONE); | |
1280 | if (r < 0) | |
1f6860d9 | 1281 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set request flag for timezone: %m"); |
89573b37 | 1282 | } |
8eb9058d | 1283 | |
5bc945be SS |
1284 | SET_FOREACH(request_options, link->network->dhcp_request_options, i) { |
1285 | uint32_t option = PTR_TO_UINT32(request_options); | |
1286 | ||
1287 | r = sd_dhcp_client_set_request_option(link->dhcp_client, option); | |
1288 | if (r == -EEXIST) { | |
1289 | log_link_debug(link, "DHCP4 CLIENT: Failed to set request flag for '%u' already exists, ignoring.", option); | |
1290 | continue; | |
1291 | } | |
1292 | ||
1293 | if (r < 0) | |
1294 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set request flag for '%u': %m", option); | |
1295 | } | |
1296 | ||
0e96961d | 1297 | ORDERED_HASHMAP_FOREACH(send_option, link->network->dhcp_client_send_options, i) { |
cb29c156 SS |
1298 | r = sd_dhcp_client_set_dhcp_option(link->dhcp_client, send_option); |
1299 | if (r < 0) | |
1300 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set send option: %m"); | |
1301 | } | |
1302 | ||
7192bb81 LP |
1303 | r = dhcp4_set_hostname(link); |
1304 | if (r < 0) | |
a8494759 | 1305 | return r; |
3c9b8860 TG |
1306 | |
1307 | if (link->network->dhcp_vendor_class_identifier) { | |
1308 | r = sd_dhcp_client_set_vendor_class_identifier(link->dhcp_client, | |
1309 | link->network->dhcp_vendor_class_identifier); | |
1310 | if (r < 0) | |
1f6860d9 | 1311 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set vendor class identifier: %m"); |
3c9b8860 TG |
1312 | } |
1313 | ||
af1c0de0 SS |
1314 | if (link->network->dhcp_user_class) { |
1315 | r = sd_dhcp_client_set_user_class(link->dhcp_client, (const char **) link->network->dhcp_user_class); | |
1316 | if (r < 0) | |
1f6860d9 | 1317 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set user class: %m"); |
af1c0de0 SS |
1318 | } |
1319 | ||
9faed222 SS |
1320 | if (link->network->dhcp_client_port) { |
1321 | r = sd_dhcp_client_set_client_port(link->dhcp_client, link->network->dhcp_client_port); | |
1322 | if (r < 0) | |
1f6860d9 | 1323 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set listen port: %m"); |
9faed222 SS |
1324 | } |
1325 | ||
715cedfb SS |
1326 | if (link->network->dhcp_max_attempts > 0) { |
1327 | r = sd_dhcp_client_set_max_attempts(link->dhcp_client, link->network->dhcp_max_attempts); | |
1328 | if (r < 0) | |
1329 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set max attempts: %m"); | |
1330 | } | |
1331 | ||
afe42aef SC |
1332 | if (link->network->ip_service_type > 0) { |
1333 | r = sd_dhcp_client_set_service_type(link->dhcp_client, link->network->ip_service_type); | |
1334 | if (r < 0) | |
1335 | return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set ip service type: %m"); | |
1336 | } | |
1337 | return dhcp4_set_client_identifier(link); | |
3c9b8860 | 1338 | } |
ca5ad760 YW |
1339 | |
1340 | int config_parse_dhcp_max_attempts( | |
1341 | const char *unit, | |
1342 | const char *filename, | |
1343 | unsigned line, | |
1344 | const char *section, | |
1345 | unsigned section_line, | |
1346 | const char *lvalue, | |
1347 | int ltype, | |
1348 | const char *rvalue, | |
1349 | void *data, | |
1350 | void *userdata) { | |
1351 | ||
1352 | Network *network = data; | |
1353 | uint64_t a; | |
1354 | int r; | |
1355 | ||
1356 | assert(network); | |
1357 | assert(lvalue); | |
1358 | assert(rvalue); | |
1359 | ||
1360 | if (isempty(rvalue)) { | |
1361 | network->dhcp_max_attempts = 0; | |
1362 | return 0; | |
1363 | } | |
1364 | ||
1365 | if (streq(rvalue, "infinity")) { | |
1366 | network->dhcp_max_attempts = (uint64_t) -1; | |
1367 | return 0; | |
1368 | } | |
1369 | ||
1370 | r = safe_atou64(rvalue, &a); | |
1371 | if (r < 0) { | |
1372 | log_syntax(unit, LOG_ERR, filename, line, r, | |
1373 | "Failed to parse DHCP maximum attempts, ignoring: %s", rvalue); | |
1374 | return 0; | |
1375 | } | |
1376 | ||
1377 | if (a == 0) { | |
1378 | log_syntax(unit, LOG_ERR, filename, line, 0, | |
1379 | "%s= must be positive integer or 'infinity', ignoring: %s", lvalue, rvalue); | |
1380 | return 0; | |
1381 | } | |
1382 | ||
1383 | network->dhcp_max_attempts = a; | |
1384 | ||
1385 | return 0; | |
1386 | } | |
1387 | ||
1388 | int config_parse_dhcp_black_listed_ip_address( | |
1389 | const char *unit, | |
1390 | const char *filename, | |
1391 | unsigned line, | |
1392 | const char *section, | |
1393 | unsigned section_line, | |
1394 | const char *lvalue, | |
1395 | int ltype, | |
1396 | const char *rvalue, | |
1397 | void *data, | |
1398 | void *userdata) { | |
1399 | ||
1400 | Network *network = data; | |
1401 | const char *p; | |
1402 | int r; | |
1403 | ||
1404 | assert(filename); | |
1405 | assert(lvalue); | |
1406 | assert(rvalue); | |
1407 | assert(data); | |
1408 | ||
1409 | if (isempty(rvalue)) { | |
1410 | network->dhcp_black_listed_ip = set_free(network->dhcp_black_listed_ip); | |
1411 | return 0; | |
1412 | } | |
1413 | ||
1414 | for (p = rvalue;;) { | |
1415 | _cleanup_free_ char *n = NULL; | |
1416 | union in_addr_union ip; | |
1417 | ||
1418 | r = extract_first_word(&p, &n, NULL, 0); | |
1419 | if (r < 0) { | |
1420 | log_syntax(unit, LOG_ERR, filename, line, r, | |
1421 | "Failed to parse DHCP black listed ip address, ignoring assignment: %s", | |
1422 | rvalue); | |
1423 | return 0; | |
1424 | } | |
1425 | if (r == 0) | |
1426 | return 0; | |
1427 | ||
1428 | r = in_addr_from_string(AF_INET, n, &ip); | |
1429 | if (r < 0) { | |
1430 | log_syntax(unit, LOG_ERR, filename, line, r, | |
1431 | "DHCP black listed ip address is invalid, ignoring assignment: %s", n); | |
1432 | continue; | |
1433 | } | |
1434 | ||
1435 | r = set_ensure_allocated(&network->dhcp_black_listed_ip, NULL); | |
1436 | if (r < 0) | |
1437 | return log_oom(); | |
1438 | ||
1439 | r = set_put(network->dhcp_black_listed_ip, UINT32_TO_PTR(ip.in.s_addr)); | |
1440 | if (r < 0) | |
1441 | log_syntax(unit, LOG_ERR, filename, line, r, | |
1442 | "Failed to store DHCP black listed ip address '%s', ignoring assignment: %m", n); | |
1443 | } | |
1444 | ||
1445 | return 0; | |
1446 | } | |
1447 | ||
1448 | int config_parse_dhcp_user_class( | |
1449 | const char *unit, | |
1450 | const char *filename, | |
1451 | unsigned line, | |
1452 | const char *section, | |
1453 | unsigned section_line, | |
1454 | const char *lvalue, | |
1455 | int ltype, | |
1456 | const char *rvalue, | |
1457 | void *data, | |
1458 | void *userdata) { | |
1459 | ||
1460 | char ***l = data; | |
1461 | int r; | |
1462 | ||
1463 | assert(l); | |
1464 | assert(lvalue); | |
1465 | assert(rvalue); | |
1466 | ||
1467 | if (isempty(rvalue)) { | |
1468 | *l = strv_free(*l); | |
1469 | return 0; | |
1470 | } | |
1471 | ||
1472 | for (;;) { | |
1473 | _cleanup_free_ char *w = NULL; | |
1474 | ||
1475 | r = extract_first_word(&rvalue, &w, NULL, 0); | |
1476 | if (r == -ENOMEM) | |
1477 | return log_oom(); | |
1478 | if (r < 0) { | |
1479 | log_syntax(unit, LOG_ERR, filename, line, r, | |
1480 | "Failed to split user classes option, ignoring: %s", rvalue); | |
1481 | break; | |
1482 | } | |
1483 | if (r == 0) | |
1484 | break; | |
1485 | ||
1486 | if (strlen(w) > 255) { | |
1487 | log_syntax(unit, LOG_ERR, filename, line, 0, | |
1488 | "%s length is not in the range 1-255, ignoring.", w); | |
1489 | continue; | |
1490 | } | |
1491 | ||
1492 | r = strv_push(l, w); | |
1493 | if (r < 0) | |
1494 | return log_oom(); | |
1495 | ||
1496 | w = NULL; | |
1497 | } | |
1498 | ||
1499 | return 0; | |
1500 | } | |
1501 | ||
5bc945be SS |
1502 | int config_parse_dhcp_request_options( |
1503 | const char *unit, | |
1504 | const char *filename, | |
1505 | unsigned line, | |
1506 | const char *section, | |
1507 | unsigned section_line, | |
1508 | const char *lvalue, | |
1509 | int ltype, | |
1510 | const char *rvalue, | |
1511 | void *data, | |
1512 | void *userdata) { | |
1513 | ||
1514 | Network *network = data; | |
1515 | const char *p; | |
1516 | int r; | |
1517 | ||
1518 | assert(filename); | |
1519 | assert(lvalue); | |
1520 | assert(rvalue); | |
1521 | assert(data); | |
1522 | ||
1523 | if (isempty(rvalue)) { | |
1524 | network->dhcp_request_options = set_free(network->dhcp_request_options); | |
1525 | return 0; | |
1526 | } | |
1527 | ||
1528 | for (p = rvalue;;) { | |
1529 | _cleanup_free_ char *n = NULL; | |
1530 | uint32_t i; | |
1531 | ||
1532 | r = extract_first_word(&p, &n, NULL, 0); | |
1533 | if (r < 0) { | |
1534 | log_syntax(unit, LOG_ERR, filename, line, r, | |
1535 | "Failed to parse DHCP request option, ignoring assignment: %s", | |
1536 | rvalue); | |
1537 | return 0; | |
1538 | } | |
1539 | if (r == 0) | |
1540 | return 0; | |
1541 | ||
1542 | r = safe_atou32(n, &i); | |
1543 | if (r < 0) { | |
1544 | log_syntax(unit, LOG_ERR, filename, line, r, | |
1545 | "DHCP request option is invalid, ignoring assignment: %s", n); | |
1546 | continue; | |
1547 | } | |
1548 | ||
1549 | if (i < 1 || i >= 255) { | |
1550 | log_syntax(unit, LOG_ERR, filename, line, r, | |
1551 | "DHCP request option is invalid, valid range is 1-254, ignoring assignment: %s", n); | |
1552 | continue; | |
1553 | } | |
1554 | ||
1555 | r = set_ensure_allocated(&network->dhcp_request_options, NULL); | |
1556 | if (r < 0) | |
1557 | return log_oom(); | |
1558 | ||
1559 | r = set_put(network->dhcp_request_options, UINT32_TO_PTR(i)); | |
1560 | if (r < 0) | |
1561 | log_syntax(unit, LOG_ERR, filename, line, r, | |
1562 | "Failed to store DHCP request option '%s', ignoring assignment: %m", n); | |
1563 | } | |
1564 | ||
1565 | return 0; | |
1566 | } | |
1567 | ||
ca5ad760 YW |
1568 | static const char* const dhcp_client_identifier_table[_DHCP_CLIENT_ID_MAX] = { |
1569 | [DHCP_CLIENT_ID_MAC] = "mac", | |
1570 | [DHCP_CLIENT_ID_DUID] = "duid", | |
1571 | [DHCP_CLIENT_ID_DUID_ONLY] = "duid-only", | |
1572 | }; | |
1573 | ||
1574 | DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(dhcp_client_identifier, DHCPClientIdentifier); | |
1575 | DEFINE_CONFIG_PARSE_ENUM(config_parse_dhcp_client_identifier, dhcp_client_identifier, DHCPClientIdentifier, | |
1576 | "Failed to parse client identifier type"); |