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a6cc569e TG |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright (C) 2013 Intel Corporation. All rights reserved. | |
5 | Copyright (C) 2014 Tom Gundersen | |
6 | ||
7 | systemd is free software; you can redistribute it and/or modify it | |
8 | under the terms of the GNU Lesser General Public License as published by | |
9 | the Free Software Foundation; either version 2.1 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | systemd is distributed in the hope that it will be useful, but | |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | Lesser General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU Lesser General Public License | |
18 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
19 | ***/ | |
20 | ||
21 | #include <stdlib.h> | |
22 | #include <errno.h> | |
23 | #include <string.h> | |
24 | #include <stdio.h> | |
fe8db0c5 | 25 | #include <arpa/inet.h> |
a6cc569e | 26 | |
fe8db0c5 | 27 | #include "fileio.h" |
bab47929 | 28 | #include "unaligned.h" |
df40eee8 | 29 | #include "in-addr-util.h" |
958b66ea | 30 | #include "hostname-util.h" |
a6cc569e | 31 | #include "dhcp-protocol.h" |
fe8db0c5 TG |
32 | #include "dhcp-lease-internal.h" |
33 | #include "sd-dhcp-lease.h" | |
09bee74d | 34 | #include "network-internal.h" |
37de2509 | 35 | #include "dns-domain.h" |
a6cc569e TG |
36 | |
37 | int sd_dhcp_lease_get_address(sd_dhcp_lease *lease, struct in_addr *addr) { | |
38 | assert_return(lease, -EINVAL); | |
39 | assert_return(addr, -EINVAL); | |
40 | ||
41 | addr->s_addr = lease->address; | |
42 | ||
43 | return 0; | |
44 | } | |
45 | ||
68ceb9df PF |
46 | int sd_dhcp_lease_get_lifetime(sd_dhcp_lease *lease, uint32_t *lifetime) { |
47 | assert_return(lease, -EINVAL); | |
1c6eb4e3 | 48 | assert_return(lifetime, -EINVAL); |
68ceb9df PF |
49 | |
50 | *lifetime = lease->lifetime; | |
51 | ||
52 | return 0; | |
53 | } | |
54 | ||
a6cc569e TG |
55 | int sd_dhcp_lease_get_mtu(sd_dhcp_lease *lease, uint16_t *mtu) { |
56 | assert_return(lease, -EINVAL); | |
57 | assert_return(mtu, -EINVAL); | |
58 | ||
59 | if (lease->mtu) | |
60 | *mtu = lease->mtu; | |
61 | else | |
62 | return -ENOENT; | |
63 | ||
64 | return 0; | |
65 | } | |
66 | ||
a2ba62c7 | 67 | int sd_dhcp_lease_get_dns(sd_dhcp_lease *lease, const struct in_addr **addr) { |
a6cc569e TG |
68 | assert_return(lease, -EINVAL); |
69 | assert_return(addr, -EINVAL); | |
a6cc569e TG |
70 | |
71 | if (lease->dns_size) { | |
a6cc569e | 72 | *addr = lease->dns; |
a2ba62c7 | 73 | return lease->dns_size; |
a6cc569e TG |
74 | } else |
75 | return -ENOENT; | |
76 | ||
77 | return 0; | |
78 | } | |
79 | ||
a2ba62c7 | 80 | int sd_dhcp_lease_get_ntp(sd_dhcp_lease *lease, const struct in_addr **addr) { |
46844696 TG |
81 | assert_return(lease, -EINVAL); |
82 | assert_return(addr, -EINVAL); | |
46844696 TG |
83 | |
84 | if (lease->ntp_size) { | |
46844696 | 85 | *addr = lease->ntp; |
a2ba62c7 | 86 | return lease->ntp_size; |
46844696 TG |
87 | } else |
88 | return -ENOENT; | |
89 | ||
90 | return 0; | |
91 | } | |
92 | ||
a6cc569e TG |
93 | int sd_dhcp_lease_get_domainname(sd_dhcp_lease *lease, const char **domainname) { |
94 | assert_return(lease, -EINVAL); | |
95 | assert_return(domainname, -EINVAL); | |
96 | ||
97 | if (lease->domainname) | |
98 | *domainname = lease->domainname; | |
99 | else | |
100 | return -ENOENT; | |
101 | ||
102 | return 0; | |
103 | } | |
104 | ||
105 | int sd_dhcp_lease_get_hostname(sd_dhcp_lease *lease, const char **hostname) { | |
106 | assert_return(lease, -EINVAL); | |
107 | assert_return(hostname, -EINVAL); | |
108 | ||
109 | if (lease->hostname) | |
110 | *hostname = lease->hostname; | |
111 | else | |
112 | return -ENOENT; | |
113 | ||
114 | return 0; | |
115 | } | |
116 | ||
ce78df79 TG |
117 | int sd_dhcp_lease_get_root_path(sd_dhcp_lease *lease, const char **root_path) { |
118 | assert_return(lease, -EINVAL); | |
119 | assert_return(root_path, -EINVAL); | |
120 | ||
121 | if (lease->root_path) | |
122 | *root_path = lease->root_path; | |
123 | else | |
124 | return -ENOENT; | |
125 | ||
126 | return 0; | |
127 | } | |
128 | ||
a6cc569e TG |
129 | int sd_dhcp_lease_get_router(sd_dhcp_lease *lease, struct in_addr *addr) { |
130 | assert_return(lease, -EINVAL); | |
131 | assert_return(addr, -EINVAL); | |
132 | ||
8ddbeaa2 UTL |
133 | if (lease->router != INADDR_ANY) |
134 | addr->s_addr = lease->router; | |
135 | else | |
136 | return -ENOENT; | |
a6cc569e TG |
137 | |
138 | return 0; | |
139 | } | |
140 | ||
141 | int sd_dhcp_lease_get_netmask(sd_dhcp_lease *lease, struct in_addr *addr) { | |
142 | assert_return(lease, -EINVAL); | |
143 | assert_return(addr, -EINVAL); | |
144 | ||
145 | addr->s_addr = lease->subnet_mask; | |
146 | ||
147 | return 0; | |
148 | } | |
149 | ||
0ad853bc TG |
150 | int sd_dhcp_lease_get_server_identifier(sd_dhcp_lease *lease, struct in_addr *addr) { |
151 | assert_return(lease, -EINVAL); | |
152 | assert_return(addr, -EINVAL); | |
153 | ||
154 | addr->s_addr = lease->server_address; | |
155 | ||
156 | return 0; | |
157 | } | |
158 | ||
8e34a618 TG |
159 | int sd_dhcp_lease_get_next_server(sd_dhcp_lease *lease, struct in_addr *addr) { |
160 | assert_return(lease, -EINVAL); | |
161 | assert_return(addr, -EINVAL); | |
162 | ||
163 | addr->s_addr = lease->next_server; | |
164 | ||
165 | return 0; | |
166 | } | |
167 | ||
a2ba62c7 | 168 | int sd_dhcp_lease_get_routes(sd_dhcp_lease *lease, struct sd_dhcp_route **routes) { |
e1ea665e EY |
169 | |
170 | assert_return(lease, -EINVAL); | |
171 | assert_return(routes, -EINVAL); | |
e1ea665e EY |
172 | |
173 | if (lease->static_route_size) { | |
174 | *routes = lease->static_route; | |
a2ba62c7 | 175 | return lease->static_route_size; |
e1ea665e EY |
176 | } else |
177 | return -ENOENT; | |
178 | ||
179 | return 0; | |
180 | } | |
181 | ||
e43a8393 BG |
182 | int sd_dhcp_lease_get_vendor_specific(sd_dhcp_lease *lease, const uint8_t **data, |
183 | size_t *data_len) { | |
184 | assert_return(lease, -EINVAL); | |
185 | assert_return(data, -EINVAL); | |
186 | assert_return(data_len, -EINVAL); | |
187 | ||
188 | if (!lease->vendor_specific) | |
189 | return -ENOENT; | |
190 | ||
191 | *data = lease->vendor_specific; | |
192 | *data_len = lease->vendor_specific_len; | |
193 | ||
194 | return 0; | |
195 | } | |
196 | ||
a6cc569e TG |
197 | sd_dhcp_lease *sd_dhcp_lease_ref(sd_dhcp_lease *lease) { |
198 | if (lease) | |
199 | assert_se(REFCNT_INC(lease->n_ref) >= 2); | |
200 | ||
201 | return lease; | |
202 | } | |
203 | ||
204 | sd_dhcp_lease *sd_dhcp_lease_unref(sd_dhcp_lease *lease) { | |
f0c4b1c3 | 205 | if (lease && REFCNT_DEC(lease->n_ref) == 0) { |
a6cc569e TG |
206 | free(lease->hostname); |
207 | free(lease->domainname); | |
208 | free(lease->dns); | |
81d98a39 | 209 | free(lease->ntp); |
e1ea665e | 210 | free(lease->static_route); |
e37f74a6 | 211 | free(lease->client_id); |
e43a8393 | 212 | free(lease->vendor_specific); |
a6cc569e TG |
213 | free(lease); |
214 | } | |
215 | ||
216 | return NULL; | |
217 | } | |
218 | ||
e140ae58 | 219 | static void lease_parse_u32(const uint8_t *option, size_t len, uint32_t *ret, uint32_t min) { |
e140ae58 TG |
220 | assert(option); |
221 | assert(ret); | |
222 | ||
223 | if (len == 4) { | |
bab47929 | 224 | *ret = unaligned_read_be32((be32_t*) option); |
e140ae58 TG |
225 | |
226 | if (*ret < min) | |
227 | *ret = min; | |
228 | } | |
229 | } | |
230 | ||
f5c0c00f TG |
231 | static void lease_parse_s32(const uint8_t *option, size_t len, int32_t *ret) { |
232 | lease_parse_u32(option, len, (uint32_t *)ret, 0); | |
233 | } | |
234 | ||
e140ae58 | 235 | static void lease_parse_u16(const uint8_t *option, size_t len, uint16_t *ret, uint16_t min) { |
e140ae58 TG |
236 | assert(option); |
237 | assert(ret); | |
238 | ||
239 | if (len == 2) { | |
bab47929 | 240 | *ret = unaligned_read_be16((be16_t*) option); |
e140ae58 TG |
241 | |
242 | if (*ret < min) | |
243 | *ret = min; | |
244 | } | |
245 | } | |
246 | ||
247 | static void lease_parse_be32(const uint8_t *option, size_t len, be32_t *ret) { | |
248 | assert(option); | |
249 | assert(ret); | |
250 | ||
251 | if (len == 4) | |
252 | memcpy(ret, option, 4); | |
253 | } | |
254 | ||
f5c0c00f TG |
255 | static void lease_parse_bool(const uint8_t *option, size_t len, bool *ret) { |
256 | assert(option); | |
257 | assert(ret); | |
258 | ||
259 | if (len == 1) | |
260 | *ret = !!(*option); | |
261 | } | |
262 | ||
263 | static void lease_parse_u8(const uint8_t *option, size_t len, uint8_t *ret, uint8_t min) { | |
264 | assert(option); | |
265 | assert(ret); | |
266 | ||
267 | if (len == 1) { | |
268 | *ret = *option; | |
269 | ||
270 | if (*ret < min) | |
271 | *ret = min; | |
272 | } | |
273 | } | |
274 | ||
e140ae58 TG |
275 | static int lease_parse_string(const uint8_t *option, size_t len, char **ret) { |
276 | assert(option); | |
277 | assert(ret); | |
278 | ||
279 | if (len >= 1) { | |
280 | char *string; | |
281 | ||
282 | string = strndup((const char *)option, len); | |
283 | if (!string) | |
284 | return -errno; | |
285 | ||
286 | free(*ret); | |
287 | *ret = string; | |
288 | } | |
289 | ||
290 | return 0; | |
291 | } | |
292 | ||
f5c0c00f | 293 | static int lease_parse_in_addrs_aux(const uint8_t *option, size_t len, struct in_addr **ret, size_t *ret_size, size_t mult) { |
e140ae58 TG |
294 | assert(option); |
295 | assert(ret); | |
296 | assert(ret_size); | |
297 | ||
f5c0c00f | 298 | if (len && !(len % (4 * mult))) { |
e140ae58 TG |
299 | size_t size; |
300 | struct in_addr *addresses; | |
301 | ||
302 | size = len / 4; | |
303 | ||
304 | addresses = newdup(struct in_addr, option, size); | |
305 | if (!addresses) | |
306 | return -ENOMEM; | |
307 | ||
308 | free(*ret); | |
309 | *ret = addresses; | |
310 | *ret_size = size; | |
311 | } | |
312 | ||
313 | return 0; | |
314 | } | |
315 | ||
f5c0c00f TG |
316 | static int lease_parse_in_addrs(const uint8_t *option, size_t len, struct in_addr **ret, size_t *ret_size) { |
317 | return lease_parse_in_addrs_aux(option, len, ret, ret_size, 1); | |
318 | } | |
319 | ||
320 | static int lease_parse_in_addrs_pairs(const uint8_t *option, size_t len, struct in_addr **ret, size_t *ret_size) { | |
321 | return lease_parse_in_addrs_aux(option, len, ret, ret_size, 2); | |
322 | } | |
323 | ||
e1ea665e EY |
324 | static int lease_parse_routes(const uint8_t *option, size_t len, struct sd_dhcp_route **routes, |
325 | size_t *routes_size, size_t *routes_allocated) { | |
326 | ||
327 | struct in_addr addr; | |
328 | ||
329 | assert(option); | |
330 | assert(routes); | |
331 | assert(routes_size); | |
332 | assert(routes_allocated); | |
333 | ||
334 | if (!len) | |
335 | return 0; | |
336 | ||
337 | if (len % 8 != 0) | |
338 | return -EINVAL; | |
339 | ||
340 | if (!GREEDY_REALLOC(*routes, *routes_allocated, *routes_size + (len / 8))) | |
341 | return -ENOMEM; | |
342 | ||
343 | while (len >= 8) { | |
344 | struct sd_dhcp_route *route = *routes + *routes_size; | |
1caa12d0 | 345 | int r; |
e1ea665e | 346 | |
1caa12d0 TG |
347 | r = in_addr_default_prefixlen((struct in_addr*) option, &route->dst_prefixlen); |
348 | if (r < 0) { | |
e1ea665e EY |
349 | log_error("Failed to determine destination prefix length from class based IP, ignoring"); |
350 | continue; | |
351 | } | |
352 | ||
353 | lease_parse_be32(option, 4, &addr.s_addr); | |
354 | route->dst_addr = inet_makeaddr(inet_netof(addr), 0); | |
355 | option += 4; | |
356 | ||
357 | lease_parse_be32(option, 4, &route->gw_addr.s_addr); | |
358 | option += 4; | |
359 | ||
360 | len -= 8; | |
361 | (*routes_size)++; | |
362 | } | |
363 | ||
364 | return 0; | |
365 | } | |
366 | ||
367 | /* parses RFC3442 Classless Static Route Option */ | |
368 | static int lease_parse_classless_routes(const uint8_t *option, size_t len, struct sd_dhcp_route **routes, | |
369 | size_t *routes_size, size_t *routes_allocated) { | |
370 | ||
371 | assert(option); | |
372 | assert(routes); | |
373 | assert(routes_size); | |
374 | assert(routes_allocated); | |
375 | ||
376 | /* option format: (subnet-mask-width significant-subnet-octets gateway-ip)* */ | |
377 | ||
378 | while (len > 0) { | |
379 | uint8_t dst_octets; | |
380 | struct sd_dhcp_route *route; | |
381 | ||
382 | if (!GREEDY_REALLOC(*routes, *routes_allocated, *routes_size + 1)) | |
383 | return -ENOMEM; | |
384 | ||
385 | route = *routes + *routes_size; | |
386 | ||
387 | dst_octets = (*option == 0 ? 0 : ((*option - 1) / 8) + 1); | |
388 | route->dst_prefixlen = *option; | |
389 | option++; | |
390 | len--; | |
391 | ||
392 | /* can't have more than 4 octets in IPv4 */ | |
393 | if (dst_octets > 4 || len < dst_octets) | |
394 | return -EINVAL; | |
395 | ||
396 | route->dst_addr.s_addr = 0; | |
397 | memcpy(&route->dst_addr.s_addr, option, dst_octets); | |
398 | option += dst_octets; | |
399 | len -= dst_octets; | |
400 | ||
401 | if (len < 4) | |
402 | return -EINVAL; | |
403 | ||
404 | lease_parse_be32(option, 4, &route->gw_addr.s_addr); | |
405 | option += 4; | |
406 | len -= 4; | |
407 | ||
408 | (*routes_size)++; | |
409 | } | |
410 | ||
411 | return 0; | |
412 | } | |
413 | ||
a6cc569e TG |
414 | int dhcp_lease_parse_options(uint8_t code, uint8_t len, const uint8_t *option, |
415 | void *user_data) { | |
416 | sd_dhcp_lease *lease = user_data; | |
e140ae58 TG |
417 | int r; |
418 | ||
419 | assert(lease); | |
a6cc569e TG |
420 | |
421 | switch(code) { | |
422 | ||
f5c0c00f TG |
423 | case DHCP_OPTION_TIME_OFFSET: |
424 | lease_parse_s32(option, len, &lease->time_offset); | |
425 | ||
426 | break; | |
427 | ||
428 | case DHCP_OPTION_INTERFACE_MTU_AGING_TIMEOUT: | |
429 | lease_parse_u32(option, len, &lease->mtu_aging_timeout, 0); | |
430 | ||
431 | break; | |
432 | ||
a6cc569e | 433 | case DHCP_OPTION_IP_ADDRESS_LEASE_TIME: |
e140ae58 | 434 | lease_parse_u32(option, len, &lease->lifetime, 1); |
a6cc569e TG |
435 | |
436 | break; | |
437 | ||
438 | case DHCP_OPTION_SERVER_IDENTIFIER: | |
e140ae58 | 439 | lease_parse_be32(option, len, &lease->server_address); |
a6cc569e TG |
440 | |
441 | break; | |
442 | ||
443 | case DHCP_OPTION_SUBNET_MASK: | |
e140ae58 | 444 | lease_parse_be32(option, len, &lease->subnet_mask); |
a6cc569e TG |
445 | |
446 | break; | |
447 | ||
f5c0c00f TG |
448 | case DHCP_OPTION_BROADCAST: |
449 | lease_parse_be32(option, len, &lease->broadcast); | |
450 | ||
451 | break; | |
452 | ||
a6cc569e | 453 | case DHCP_OPTION_ROUTER: |
a0518527 NO |
454 | if(len >= 4) |
455 | lease_parse_be32(option, 4, &lease->router); | |
a6cc569e TG |
456 | |
457 | break; | |
458 | ||
459 | case DHCP_OPTION_DOMAIN_NAME_SERVER: | |
e140ae58 TG |
460 | r = lease_parse_in_addrs(option, len, &lease->dns, &lease->dns_size); |
461 | if (r < 0) | |
462 | return r; | |
46844696 TG |
463 | |
464 | break; | |
465 | ||
466 | case DHCP_OPTION_NTP_SERVER: | |
e140ae58 TG |
467 | r = lease_parse_in_addrs(option, len, &lease->ntp, &lease->ntp_size); |
468 | if (r < 0) | |
469 | return r; | |
a6cc569e TG |
470 | |
471 | break; | |
472 | ||
f5c0c00f TG |
473 | case DHCP_OPTION_POLICY_FILTER: |
474 | r = lease_parse_in_addrs_pairs(option, len, &lease->policy_filter, &lease->policy_filter_size); | |
475 | if (r < 0) | |
476 | return r; | |
477 | ||
478 | break; | |
479 | ||
480 | case DHCP_OPTION_STATIC_ROUTE: | |
e1ea665e EY |
481 | r = lease_parse_routes(option, len, &lease->static_route, &lease->static_route_size, |
482 | &lease->static_route_allocated); | |
f5c0c00f TG |
483 | if (r < 0) |
484 | return r; | |
485 | ||
486 | break; | |
487 | ||
a6cc569e | 488 | case DHCP_OPTION_INTERFACE_MTU: |
e140ae58 | 489 | lease_parse_u16(option, len, &lease->mtu, 68); |
a6cc569e TG |
490 | |
491 | break; | |
492 | ||
f5c0c00f TG |
493 | case DHCP_OPTION_INTERFACE_MDR: |
494 | lease_parse_u16(option, len, &lease->mdr, 576); | |
495 | ||
496 | break; | |
497 | ||
498 | case DHCP_OPTION_INTERFACE_TTL: | |
499 | lease_parse_u8(option, len, &lease->ttl, 1); | |
500 | ||
501 | break; | |
502 | ||
503 | case DHCP_OPTION_BOOT_FILE_SIZE: | |
504 | lease_parse_u16(option, len, &lease->boot_file_size, 0); | |
505 | ||
506 | break; | |
507 | ||
a6cc569e | 508 | case DHCP_OPTION_DOMAIN_NAME: |
784d9b9c TG |
509 | { |
510 | _cleanup_free_ char *domainname = NULL; | |
f50f01f4 | 511 | char *e; |
784d9b9c TG |
512 | |
513 | r = lease_parse_string(option, len, &domainname); | |
e140ae58 TG |
514 | if (r < 0) |
515 | return r; | |
a6cc569e | 516 | |
f50f01f4 LP |
517 | /* Chop off trailing dot of domain name that some DHCP |
518 | * servers send us back. Internally we want to store | |
519 | * host names without trailing dots and | |
520 | * host_name_is_valid() doesn't accept them. */ | |
521 | e = endswith(domainname, "."); | |
522 | if (e) | |
523 | *e = 0; | |
524 | ||
37de2509 | 525 | if (is_localhost(domainname)) |
784d9b9c TG |
526 | break; |
527 | ||
37de2509 NO |
528 | r = dns_name_is_valid(domainname); |
529 | if (r <= 0) { | |
530 | if (r < 0) | |
531 | log_error_errno(r, "Failed to validate domain name: %s: %m", domainname); | |
532 | if (r == 0) | |
533 | log_warning("Domain name is not valid, ignoring: %s", domainname); | |
534 | break; | |
535 | } | |
536 | ||
784d9b9c TG |
537 | free(lease->domainname); |
538 | lease->domainname = domainname; | |
539 | domainname = NULL; | |
a6cc569e | 540 | |
784d9b9c TG |
541 | break; |
542 | } | |
a6cc569e | 543 | case DHCP_OPTION_HOST_NAME: |
784d9b9c TG |
544 | { |
545 | _cleanup_free_ char *hostname = NULL; | |
f50f01f4 | 546 | char *e; |
784d9b9c TG |
547 | |
548 | r = lease_parse_string(option, len, &hostname); | |
e140ae58 TG |
549 | if (r < 0) |
550 | return r; | |
a6cc569e | 551 | |
f50f01f4 LP |
552 | e = endswith(hostname, "."); |
553 | if (e) | |
554 | *e = 0; | |
555 | ||
708281b8 | 556 | if (!hostname_is_valid(hostname) || is_localhost(hostname)) |
784d9b9c TG |
557 | break; |
558 | ||
559 | free(lease->hostname); | |
560 | lease->hostname = hostname; | |
561 | hostname = NULL; | |
a6cc569e | 562 | |
784d9b9c TG |
563 | break; |
564 | } | |
ce78df79 | 565 | case DHCP_OPTION_ROOT_PATH: |
e140ae58 TG |
566 | r = lease_parse_string(option, len, &lease->root_path); |
567 | if (r < 0) | |
568 | return r; | |
ce78df79 TG |
569 | |
570 | break; | |
571 | ||
a6cc569e | 572 | case DHCP_OPTION_RENEWAL_T1_TIME: |
e140ae58 | 573 | lease_parse_u32(option, len, &lease->t1, 1); |
a6cc569e TG |
574 | |
575 | break; | |
576 | ||
577 | case DHCP_OPTION_REBINDING_T2_TIME: | |
e140ae58 | 578 | lease_parse_u32(option, len, &lease->t2, 1); |
a6cc569e | 579 | |
f5c0c00f TG |
580 | break; |
581 | ||
582 | case DHCP_OPTION_ENABLE_IP_FORWARDING: | |
583 | lease_parse_bool(option, len, &lease->ip_forward); | |
584 | ||
585 | break; | |
586 | ||
587 | case DHCP_OPTION_ENABLE_IP_FORWARDING_NL: | |
588 | lease_parse_bool(option, len, &lease->ip_forward_non_local); | |
589 | ||
a6cc569e | 590 | break; |
e1ea665e EY |
591 | |
592 | case DHCP_OPTION_CLASSLESS_STATIC_ROUTE: | |
593 | r = lease_parse_classless_routes(option, len, &lease->static_route, &lease->static_route_size, | |
594 | &lease->static_route_allocated); | |
595 | if (r < 0) | |
596 | return r; | |
597 | ||
598 | break; | |
e43a8393 BG |
599 | |
600 | case DHCP_OPTION_VENDOR_SPECIFIC: | |
601 | if (len >= 1) { | |
602 | free(lease->vendor_specific); | |
603 | lease->vendor_specific = memdup(option, len); | |
604 | if (!lease->vendor_specific) | |
605 | return -ENOMEM; | |
606 | lease->vendor_specific_len = len; | |
607 | } | |
608 | ||
609 | break; | |
a6cc569e TG |
610 | } |
611 | ||
612 | return 0; | |
613 | } | |
614 | ||
615 | int dhcp_lease_new(sd_dhcp_lease **ret) { | |
6e00a806 | 616 | sd_dhcp_lease *lease; |
a6cc569e TG |
617 | |
618 | lease = new0(sd_dhcp_lease, 1); | |
619 | if (!lease) | |
620 | return -ENOMEM; | |
621 | ||
8ddbeaa2 | 622 | lease->router = INADDR_ANY; |
a6cc569e TG |
623 | lease->n_ref = REFCNT_INIT; |
624 | ||
625 | *ret = lease; | |
a6cc569e TG |
626 | return 0; |
627 | } | |
fe8db0c5 | 628 | |
1dc24d5f | 629 | int sd_dhcp_lease_save(sd_dhcp_lease *lease, const char *lease_file) { |
fe8db0c5 TG |
630 | _cleanup_free_ char *temp_path = NULL; |
631 | _cleanup_fclose_ FILE *f = NULL; | |
fe8db0c5 | 632 | struct in_addr address; |
a2ba62c7 | 633 | const struct in_addr *addresses; |
e43a8393 BG |
634 | const uint8_t *client_id, *data; |
635 | size_t client_id_len, data_len; | |
fe8db0c5 TG |
636 | const char *string; |
637 | uint16_t mtu; | |
e1ea665e | 638 | struct sd_dhcp_route *routes; |
fe8db0c5 TG |
639 | int r; |
640 | ||
641 | assert(lease); | |
642 | assert(lease_file); | |
643 | ||
fe8db0c5 TG |
644 | r = fopen_temporary(lease_file, &f, &temp_path); |
645 | if (r < 0) | |
dacd6cee | 646 | goto fail; |
fe8db0c5 TG |
647 | |
648 | fchmod(fileno(f), 0644); | |
649 | ||
650 | r = sd_dhcp_lease_get_address(lease, &address); | |
651 | if (r < 0) | |
dacd6cee | 652 | goto fail; |
fe8db0c5 | 653 | |
fe8db0c5 TG |
654 | fprintf(f, |
655 | "# This is private data. Do not parse.\n" | |
109731eb | 656 | "ADDRESS=%s\n", inet_ntoa(address)); |
fe8db0c5 | 657 | |
fe8db0c5 TG |
658 | r = sd_dhcp_lease_get_netmask(lease, &address); |
659 | if (r < 0) | |
dacd6cee | 660 | goto fail; |
fe8db0c5 | 661 | |
109731eb | 662 | fprintf(f, "NETMASK=%s\n", inet_ntoa(address)); |
fe8db0c5 | 663 | |
8ddbeaa2 UTL |
664 | r = sd_dhcp_lease_get_router(lease, &address); |
665 | if (r >= 0) | |
666 | fprintf(f, "ROUTER=%s\n", inet_ntoa(address)); | |
667 | ||
0ad853bc | 668 | r = sd_dhcp_lease_get_server_identifier(lease, &address); |
109731eb TG |
669 | if (r >= 0) |
670 | fprintf(f, "SERVER_ADDRESS=%s\n", | |
671 | inet_ntoa(address)); | |
0ad853bc | 672 | |
8e34a618 | 673 | r = sd_dhcp_lease_get_next_server(lease, &address); |
109731eb TG |
674 | if (r >= 0) |
675 | fprintf(f, "NEXT_SERVER=%s\n", inet_ntoa(address)); | |
8e34a618 | 676 | |
fe8db0c5 TG |
677 | r = sd_dhcp_lease_get_mtu(lease, &mtu); |
678 | if (r >= 0) | |
679 | fprintf(f, "MTU=%" PRIu16 "\n", mtu); | |
680 | ||
b0e39c82 | 681 | fputs("DNS=", f); |
a2ba62c7 | 682 | r = sd_dhcp_lease_get_dns(lease, &addresses); |
109731eb | 683 | if (r >= 0) |
b0e39c82 TG |
684 | serialize_in_addrs(f, addresses, r); |
685 | fputs("\n", f); | |
109731eb | 686 | |
b0e39c82 | 687 | fputs("NTP=", f); |
a2ba62c7 | 688 | r = sd_dhcp_lease_get_ntp(lease, &addresses); |
109731eb | 689 | if (r >= 0) |
b0e39c82 TG |
690 | serialize_in_addrs(f, addresses, r); |
691 | fputs("\n", f); | |
fe8db0c5 TG |
692 | |
693 | r = sd_dhcp_lease_get_domainname(lease, &string); | |
694 | if (r >= 0) | |
695 | fprintf(f, "DOMAINNAME=%s\n", string); | |
696 | ||
697 | r = sd_dhcp_lease_get_hostname(lease, &string); | |
698 | if (r >= 0) | |
699 | fprintf(f, "HOSTNAME=%s\n", string); | |
700 | ||
ce78df79 TG |
701 | r = sd_dhcp_lease_get_root_path(lease, &string); |
702 | if (r >= 0) | |
703 | fprintf(f, "ROOT_PATH=%s\n", string); | |
704 | ||
a2ba62c7 | 705 | r = sd_dhcp_lease_get_routes(lease, &routes); |
e1ea665e | 706 | if (r >= 0) |
a2ba62c7 | 707 | serialize_dhcp_routes(f, "ROUTES", routes, r); |
e1ea665e | 708 | |
e37f74a6 DW |
709 | r = sd_dhcp_lease_get_client_id(lease, &client_id, &client_id_len); |
710 | if (r >= 0) { | |
711 | _cleanup_free_ char *client_id_hex; | |
712 | ||
dde8bb32 | 713 | client_id_hex = hexmem(client_id, client_id_len); |
e37f74a6 DW |
714 | if (!client_id_hex) { |
715 | r = -ENOMEM; | |
dacd6cee | 716 | goto fail; |
e37f74a6 DW |
717 | } |
718 | fprintf(f, "CLIENTID=%s\n", client_id_hex); | |
719 | } | |
720 | ||
e43a8393 BG |
721 | r = sd_dhcp_lease_get_vendor_specific(lease, &data, &data_len); |
722 | if (r >= 0) { | |
723 | _cleanup_free_ char *option_hex = NULL; | |
724 | ||
725 | option_hex = hexmem(data, data_len); | |
726 | if (!option_hex) { | |
727 | r = -ENOMEM; | |
dacd6cee | 728 | goto fail; |
e43a8393 BG |
729 | } |
730 | fprintf(f, "VENDOR_SPECIFIC=%s\n", option_hex); | |
731 | } | |
732 | ||
dacd6cee LP |
733 | r = fflush_and_check(f); |
734 | if (r < 0) | |
735 | goto fail; | |
fe8db0c5 | 736 | |
dacd6cee | 737 | if (rename(temp_path, lease_file) < 0) { |
fe8db0c5 | 738 | r = -errno; |
dacd6cee | 739 | goto fail; |
fe8db0c5 TG |
740 | } |
741 | ||
dacd6cee LP |
742 | return 0; |
743 | ||
744 | fail: | |
745 | if (temp_path) | |
746 | (void) unlink(temp_path); | |
fe8db0c5 | 747 | |
dacd6cee | 748 | return log_error_errno(r, "Failed to save lease data %s: %m", lease_file); |
fe8db0c5 TG |
749 | } |
750 | ||
1dc24d5f | 751 | int sd_dhcp_lease_load(sd_dhcp_lease **ret, const char *lease_file) { |
fe8db0c5 TG |
752 | _cleanup_dhcp_lease_unref_ sd_dhcp_lease *lease = NULL; |
753 | _cleanup_free_ char *address = NULL, *router = NULL, *netmask = NULL, | |
8e34a618 | 754 | *server_address = NULL, *next_server = NULL, |
e37f74a6 | 755 | *dns = NULL, *ntp = NULL, *mtu = NULL, |
e43a8393 BG |
756 | *routes = NULL, *client_id_hex = NULL, |
757 | *vendor_specific_hex = NULL; | |
fe8db0c5 TG |
758 | struct in_addr addr; |
759 | int r; | |
760 | ||
761 | assert(lease_file); | |
762 | assert(ret); | |
763 | ||
764 | r = dhcp_lease_new(&lease); | |
765 | if (r < 0) | |
766 | return r; | |
767 | ||
768 | r = parse_env_file(lease_file, NEWLINE, | |
769 | "ADDRESS", &address, | |
770 | "ROUTER", &router, | |
771 | "NETMASK", &netmask, | |
0ad853bc | 772 | "SERVER_IDENTIFIER", &server_address, |
8e34a618 | 773 | "NEXT_SERVER", &next_server, |
109731eb TG |
774 | "DNS", &dns, |
775 | "NTP", &ntp, | |
fe8db0c5 TG |
776 | "MTU", &mtu, |
777 | "DOMAINNAME", &lease->domainname, | |
778 | "HOSTNAME", &lease->hostname, | |
ce78df79 | 779 | "ROOT_PATH", &lease->root_path, |
e1ea665e | 780 | "ROUTES", &routes, |
e37f74a6 | 781 | "CLIENTID", &client_id_hex, |
e43a8393 | 782 | "VENDOR_SPECIFIC", &vendor_specific_hex, |
fe8db0c5 TG |
783 | NULL); |
784 | if (r < 0) { | |
785 | if (r == -ENOENT) | |
786 | return 0; | |
787 | ||
23bbb0de | 788 | return log_error_errno(r, "Failed to read %s: %m", lease_file); |
fe8db0c5 TG |
789 | } |
790 | ||
791 | r = inet_pton(AF_INET, address, &addr); | |
792 | if (r < 0) | |
793 | return r; | |
794 | ||
795 | lease->address = addr.s_addr; | |
796 | ||
8ddbeaa2 UTL |
797 | if (router) { |
798 | r = inet_pton(AF_INET, router, &addr); | |
799 | if (r < 0) | |
800 | return r; | |
fe8db0c5 | 801 | |
8ddbeaa2 UTL |
802 | lease->router = addr.s_addr; |
803 | } | |
fe8db0c5 TG |
804 | |
805 | r = inet_pton(AF_INET, netmask, &addr); | |
806 | if (r < 0) | |
807 | return r; | |
808 | ||
809 | lease->subnet_mask = addr.s_addr; | |
810 | ||
0ad853bc TG |
811 | if (server_address) { |
812 | r = inet_pton(AF_INET, server_address, &addr); | |
813 | if (r < 0) | |
814 | return r; | |
815 | ||
816 | lease->server_address = addr.s_addr; | |
817 | } | |
818 | ||
8e34a618 TG |
819 | if (next_server) { |
820 | r = inet_pton(AF_INET, next_server, &addr); | |
821 | if (r < 0) | |
822 | return r; | |
823 | ||
824 | lease->next_server = addr.s_addr; | |
825 | } | |
826 | ||
109731eb | 827 | if (dns) { |
a2ba62c7 | 828 | r = deserialize_in_addrs(&lease->dns, dns); |
109731eb TG |
829 | if (r < 0) |
830 | return r; | |
a2ba62c7 LP |
831 | |
832 | lease->dns_size = r; | |
109731eb TG |
833 | } |
834 | ||
835 | if (ntp) { | |
a2ba62c7 | 836 | r = deserialize_in_addrs(&lease->ntp, ntp); |
109731eb TG |
837 | if (r < 0) |
838 | return r; | |
a2ba62c7 LP |
839 | |
840 | lease->ntp_size = r; | |
109731eb TG |
841 | } |
842 | ||
fe8db0c5 TG |
843 | if (mtu) { |
844 | uint16_t u; | |
845 | if (sscanf(mtu, "%" SCNu16, &u) > 0) | |
846 | lease->mtu = u; | |
847 | } | |
848 | ||
e1ea665e EY |
849 | if (routes) { |
850 | r = deserialize_dhcp_routes(&lease->static_route, &lease->static_route_size, | |
851 | &lease->static_route_allocated, routes); | |
852 | if (r < 0) | |
853 | return r; | |
854 | } | |
855 | ||
e37f74a6 | 856 | if (client_id_hex) { |
30494563 | 857 | if (strlen(client_id_hex) % 2) |
e37f74a6 DW |
858 | return -EINVAL; |
859 | ||
30494563 TG |
860 | r = unhexmem(client_id_hex, strlen(client_id_hex), (void**) &lease->client_id, &lease->client_id_len); |
861 | if (r < 0) | |
862 | return r; | |
e37f74a6 DW |
863 | } |
864 | ||
e43a8393 BG |
865 | if (vendor_specific_hex) { |
866 | if (strlen(vendor_specific_hex) % 2) | |
867 | return -EINVAL; | |
868 | ||
869 | r = unhexmem(vendor_specific_hex, strlen(vendor_specific_hex), (void**) &lease->vendor_specific, &lease->vendor_specific_len); | |
870 | if (r < 0) | |
871 | return r; | |
872 | } | |
873 | ||
fe8db0c5 TG |
874 | *ret = lease; |
875 | lease = NULL; | |
876 | ||
877 | return 0; | |
878 | } | |
9e64dd72 TG |
879 | |
880 | int dhcp_lease_set_default_subnet_mask(sd_dhcp_lease *lease) { | |
df40eee8 TG |
881 | struct in_addr address; |
882 | struct in_addr mask; | |
883 | int r; | |
9e64dd72 TG |
884 | |
885 | assert(lease); | |
9e64dd72 | 886 | |
df40eee8 | 887 | address.s_addr = lease->address; |
9e64dd72 TG |
888 | |
889 | /* fall back to the default subnet masks based on address class */ | |
df40eee8 TG |
890 | r = in_addr_default_subnet_mask(&address, &mask); |
891 | if (r < 0) | |
892 | return r; | |
9e64dd72 | 893 | |
df40eee8 | 894 | lease->subnet_mask = mask.s_addr; |
9e64dd72 TG |
895 | |
896 | return 0; | |
897 | } | |
e37f74a6 DW |
898 | |
899 | int sd_dhcp_lease_get_client_id(sd_dhcp_lease *lease, const uint8_t **client_id, | |
900 | size_t *client_id_len) { | |
901 | assert_return(lease, -EINVAL); | |
902 | assert_return(client_id, -EINVAL); | |
903 | assert_return(client_id_len, -EINVAL); | |
904 | ||
905 | *client_id = lease->client_id; | |
906 | *client_id_len = lease->client_id_len; | |
907 | return 0; | |
908 | } | |
909 | ||
910 | int dhcp_lease_set_client_id(sd_dhcp_lease *lease, const uint8_t *client_id, | |
911 | size_t client_id_len) { | |
912 | assert_return(lease, -EINVAL); | |
913 | assert_return((!client_id && !client_id_len) || | |
914 | (client_id && client_id_len), -EINVAL); | |
915 | ||
916 | free (lease->client_id); | |
917 | lease->client_id = NULL; | |
918 | lease->client_id_len = 0; | |
919 | ||
920 | if (client_id) { | |
921 | lease->client_id = memdup (client_id, client_id_len); | |
922 | lease->client_id_len = client_id_len; | |
923 | } | |
924 | ||
925 | return 0; | |
926 | } |