Line data Source code
1 : /* SPDX-License-Identifier: LGPL-2.1+ */
2 : /***
3 : Copyright © 2013 Intel Corporation. All rights reserved.
4 : ***/
5 :
6 : #include <arpa/inet.h>
7 : #include <errno.h>
8 : #include <stdio.h>
9 : #include <stdlib.h>
10 : #include <string.h>
11 : #include <sys/stat.h>
12 : #include <sys/types.h>
13 : #include <unistd.h>
14 :
15 : #include "sd-dhcp-lease.h"
16 :
17 : #include "alloc-util.h"
18 : #include "dhcp-lease-internal.h"
19 : #include "dhcp-protocol.h"
20 : #include "dns-domain.h"
21 : #include "env-file.h"
22 : #include "fd-util.h"
23 : #include "fileio.h"
24 : #include "hexdecoct.h"
25 : #include "hostname-util.h"
26 : #include "in-addr-util.h"
27 : #include "network-internal.h"
28 : #include "parse-util.h"
29 : #include "stdio-util.h"
30 : #include "string-util.h"
31 : #include "strv.h"
32 : #include "tmpfile-util.h"
33 : #include "unaligned.h"
34 :
35 1 : int sd_dhcp_lease_get_address(sd_dhcp_lease *lease, struct in_addr *addr) {
36 1 : assert_return(lease, -EINVAL);
37 1 : assert_return(addr, -EINVAL);
38 :
39 1 : if (lease->address == 0)
40 0 : return -ENODATA;
41 :
42 1 : addr->s_addr = lease->address;
43 1 : return 0;
44 : }
45 :
46 0 : int sd_dhcp_lease_get_broadcast(sd_dhcp_lease *lease, struct in_addr *addr) {
47 0 : assert_return(lease, -EINVAL);
48 0 : assert_return(addr, -EINVAL);
49 :
50 0 : if (!lease->have_broadcast)
51 0 : return -ENODATA;
52 :
53 0 : addr->s_addr = lease->broadcast;
54 0 : return 0;
55 : }
56 :
57 0 : int sd_dhcp_lease_get_lifetime(sd_dhcp_lease *lease, uint32_t *lifetime) {
58 0 : assert_return(lease, -EINVAL);
59 0 : assert_return(lifetime, -EINVAL);
60 :
61 0 : if (lease->lifetime <= 0)
62 0 : return -ENODATA;
63 :
64 0 : *lifetime = lease->lifetime;
65 0 : return 0;
66 : }
67 :
68 0 : int sd_dhcp_lease_get_t1(sd_dhcp_lease *lease, uint32_t *t1) {
69 0 : assert_return(lease, -EINVAL);
70 0 : assert_return(t1, -EINVAL);
71 :
72 0 : if (lease->t1 <= 0)
73 0 : return -ENODATA;
74 :
75 0 : *t1 = lease->t1;
76 0 : return 0;
77 : }
78 :
79 0 : int sd_dhcp_lease_get_t2(sd_dhcp_lease *lease, uint32_t *t2) {
80 0 : assert_return(lease, -EINVAL);
81 0 : assert_return(t2, -EINVAL);
82 :
83 0 : if (lease->t2 <= 0)
84 0 : return -ENODATA;
85 :
86 0 : *t2 = lease->t2;
87 0 : return 0;
88 : }
89 :
90 0 : int sd_dhcp_lease_get_mtu(sd_dhcp_lease *lease, uint16_t *mtu) {
91 0 : assert_return(lease, -EINVAL);
92 0 : assert_return(mtu, -EINVAL);
93 :
94 0 : if (lease->mtu <= 0)
95 0 : return -ENODATA;
96 :
97 0 : *mtu = lease->mtu;
98 0 : return 0;
99 : }
100 :
101 0 : int sd_dhcp_lease_get_dns(sd_dhcp_lease *lease, const struct in_addr **addr) {
102 0 : assert_return(lease, -EINVAL);
103 0 : assert_return(addr, -EINVAL);
104 :
105 0 : if (lease->dns_size <= 0)
106 0 : return -ENODATA;
107 :
108 0 : *addr = lease->dns;
109 0 : return (int) lease->dns_size;
110 : }
111 :
112 0 : int sd_dhcp_lease_get_ntp(sd_dhcp_lease *lease, const struct in_addr **addr) {
113 0 : assert_return(lease, -EINVAL);
114 0 : assert_return(addr, -EINVAL);
115 :
116 0 : if (lease->ntp_size <= 0)
117 0 : return -ENODATA;
118 :
119 0 : *addr = lease->ntp;
120 0 : return (int) lease->ntp_size;
121 : }
122 :
123 0 : int sd_dhcp_lease_get_domainname(sd_dhcp_lease *lease, const char **domainname) {
124 0 : assert_return(lease, -EINVAL);
125 0 : assert_return(domainname, -EINVAL);
126 :
127 0 : if (!lease->domainname)
128 0 : return -ENODATA;
129 :
130 0 : *domainname = lease->domainname;
131 0 : return 0;
132 : }
133 :
134 0 : int sd_dhcp_lease_get_hostname(sd_dhcp_lease *lease, const char **hostname) {
135 0 : assert_return(lease, -EINVAL);
136 0 : assert_return(hostname, -EINVAL);
137 :
138 0 : if (!lease->hostname)
139 0 : return -ENODATA;
140 :
141 0 : *hostname = lease->hostname;
142 0 : return 0;
143 : }
144 :
145 0 : int sd_dhcp_lease_get_root_path(sd_dhcp_lease *lease, const char **root_path) {
146 0 : assert_return(lease, -EINVAL);
147 0 : assert_return(root_path, -EINVAL);
148 :
149 0 : if (!lease->root_path)
150 0 : return -ENODATA;
151 :
152 0 : *root_path = lease->root_path;
153 0 : return 0;
154 : }
155 :
156 1 : int sd_dhcp_lease_get_router(sd_dhcp_lease *lease, const struct in_addr **addr) {
157 1 : assert_return(lease, -EINVAL);
158 1 : assert_return(addr, -EINVAL);
159 :
160 1 : if (lease->router_size <= 0)
161 0 : return -ENODATA;
162 :
163 1 : *addr = lease->router;
164 1 : return (int) lease->router_size;
165 : }
166 :
167 1 : int sd_dhcp_lease_get_netmask(sd_dhcp_lease *lease, struct in_addr *addr) {
168 1 : assert_return(lease, -EINVAL);
169 1 : assert_return(addr, -EINVAL);
170 :
171 1 : if (!lease->have_subnet_mask)
172 0 : return -ENODATA;
173 :
174 1 : addr->s_addr = lease->subnet_mask;
175 1 : return 0;
176 : }
177 :
178 0 : int sd_dhcp_lease_get_server_identifier(sd_dhcp_lease *lease, struct in_addr *addr) {
179 0 : assert_return(lease, -EINVAL);
180 0 : assert_return(addr, -EINVAL);
181 :
182 0 : if (lease->server_address == 0)
183 0 : return -ENODATA;
184 :
185 0 : addr->s_addr = lease->server_address;
186 0 : return 0;
187 : }
188 :
189 0 : int sd_dhcp_lease_get_next_server(sd_dhcp_lease *lease, struct in_addr *addr) {
190 0 : assert_return(lease, -EINVAL);
191 0 : assert_return(addr, -EINVAL);
192 :
193 0 : if (lease->next_server == 0)
194 0 : return -ENODATA;
195 :
196 0 : addr->s_addr = lease->next_server;
197 0 : return 0;
198 : }
199 :
200 : /*
201 : * The returned routes array must be freed by the caller.
202 : * Route objects have the same lifetime of the lease and must not be freed.
203 : */
204 0 : int sd_dhcp_lease_get_routes(sd_dhcp_lease *lease, sd_dhcp_route ***routes) {
205 : sd_dhcp_route **ret;
206 : unsigned i;
207 :
208 0 : assert_return(lease, -EINVAL);
209 0 : assert_return(routes, -EINVAL);
210 :
211 0 : if (lease->static_route_size <= 0)
212 0 : return -ENODATA;
213 :
214 0 : ret = new(sd_dhcp_route *, lease->static_route_size);
215 0 : if (!ret)
216 0 : return -ENOMEM;
217 :
218 0 : for (i = 0; i < lease->static_route_size; i++)
219 0 : ret[i] = &lease->static_route[i];
220 :
221 0 : *routes = ret;
222 0 : return (int) lease->static_route_size;
223 : }
224 :
225 0 : int sd_dhcp_lease_get_search_domains(sd_dhcp_lease *lease, char ***domains) {
226 : size_t r;
227 :
228 0 : assert_return(lease, -EINVAL);
229 0 : assert_return(domains, -EINVAL);
230 :
231 0 : r = strv_length(lease->search_domains);
232 0 : if (r > 0) {
233 0 : *domains = lease->search_domains;
234 0 : return (int) r;
235 : }
236 :
237 0 : return -ENODATA;
238 : }
239 :
240 0 : int sd_dhcp_lease_get_vendor_specific(sd_dhcp_lease *lease, const void **data, size_t *data_len) {
241 0 : assert_return(lease, -EINVAL);
242 0 : assert_return(data, -EINVAL);
243 0 : assert_return(data_len, -EINVAL);
244 :
245 0 : if (lease->vendor_specific_len <= 0)
246 0 : return -ENODATA;
247 :
248 0 : *data = lease->vendor_specific;
249 0 : *data_len = lease->vendor_specific_len;
250 0 : return 0;
251 : }
252 :
253 1 : static sd_dhcp_lease *dhcp_lease_free(sd_dhcp_lease *lease) {
254 1 : assert(lease);
255 :
256 1 : while (lease->private_options) {
257 0 : struct sd_dhcp_raw_option *option = lease->private_options;
258 :
259 0 : LIST_REMOVE(options, lease->private_options, option);
260 :
261 0 : free(option->data);
262 0 : free(option);
263 : }
264 :
265 1 : free(lease->root_path);
266 1 : free(lease->router);
267 1 : free(lease->timezone);
268 1 : free(lease->hostname);
269 1 : free(lease->domainname);
270 1 : free(lease->dns);
271 1 : free(lease->ntp);
272 1 : free(lease->static_route);
273 1 : free(lease->client_id);
274 1 : free(lease->vendor_specific);
275 1 : strv_free(lease->search_domains);
276 1 : return mfree(lease);
277 : }
278 :
279 19 : DEFINE_TRIVIAL_REF_UNREF_FUNC(sd_dhcp_lease, sd_dhcp_lease, dhcp_lease_free);
280 :
281 1 : static int lease_parse_u32(const uint8_t *option, size_t len, uint32_t *ret, uint32_t min) {
282 1 : assert(option);
283 1 : assert(ret);
284 :
285 1 : if (len != 4)
286 0 : return -EINVAL;
287 :
288 1 : *ret = unaligned_read_be32((be32_t*) option);
289 1 : if (*ret < min)
290 0 : *ret = min;
291 :
292 1 : return 0;
293 : }
294 :
295 0 : static int lease_parse_u16(const uint8_t *option, size_t len, uint16_t *ret, uint16_t min) {
296 0 : assert(option);
297 0 : assert(ret);
298 :
299 0 : if (len != 2)
300 0 : return -EINVAL;
301 :
302 0 : *ret = unaligned_read_be16((be16_t*) option);
303 0 : if (*ret < min)
304 0 : *ret = min;
305 :
306 0 : return 0;
307 : }
308 :
309 2 : static int lease_parse_be32(const uint8_t *option, size_t len, be32_t *ret) {
310 2 : assert(option);
311 2 : assert(ret);
312 :
313 2 : if (len != 4)
314 0 : return -EINVAL;
315 :
316 2 : memcpy(ret, option, 4);
317 2 : return 0;
318 : }
319 :
320 1 : static int lease_parse_string(const uint8_t *option, size_t len, char **ret) {
321 1 : assert(option);
322 1 : assert(ret);
323 :
324 1 : if (len <= 0)
325 0 : *ret = mfree(*ret);
326 : else {
327 : char *string;
328 :
329 : /*
330 : * One trailing NUL byte is OK, we don't mind. See:
331 : * https://github.com/systemd/systemd/issues/1337
332 : */
333 1 : if (memchr(option, 0, len - 1))
334 0 : return -EINVAL;
335 :
336 1 : string = memdup_suffix0((const char *) option, len);
337 1 : if (!string)
338 0 : return -ENOMEM;
339 :
340 1 : free_and_replace(*ret, string);
341 : }
342 :
343 1 : return 0;
344 : }
345 :
346 1 : static int lease_parse_domain(const uint8_t *option, size_t len, char **ret) {
347 1 : _cleanup_free_ char *name = NULL, *normalized = NULL;
348 : int r;
349 :
350 1 : assert(option);
351 1 : assert(ret);
352 :
353 1 : r = lease_parse_string(option, len, &name);
354 1 : if (r < 0)
355 0 : return r;
356 1 : if (!name) {
357 0 : *ret = mfree(*ret);
358 0 : return 0;
359 : }
360 :
361 1 : r = dns_name_normalize(name, 0, &normalized);
362 1 : if (r < 0)
363 0 : return r;
364 :
365 1 : if (is_localhost(normalized))
366 0 : return -EINVAL;
367 :
368 1 : if (dns_name_is_root(normalized))
369 0 : return -EINVAL;
370 :
371 1 : free_and_replace(*ret, normalized);
372 :
373 1 : return 0;
374 : }
375 :
376 2 : static int lease_parse_in_addrs(const uint8_t *option, size_t len, struct in_addr **ret, size_t *n_ret) {
377 2 : assert(option);
378 2 : assert(ret);
379 2 : assert(n_ret);
380 :
381 2 : if (len <= 0) {
382 0 : *ret = mfree(*ret);
383 0 : *n_ret = 0;
384 : } else {
385 : size_t n_addresses;
386 : struct in_addr *addresses;
387 :
388 2 : if (len % 4 != 0)
389 0 : return -EINVAL;
390 :
391 2 : n_addresses = len / 4;
392 :
393 2 : addresses = newdup(struct in_addr, option, n_addresses);
394 2 : if (!addresses)
395 0 : return -ENOMEM;
396 :
397 2 : free(*ret);
398 2 : *ret = addresses;
399 2 : *n_ret = n_addresses;
400 : }
401 :
402 2 : return 0;
403 : }
404 :
405 0 : static int lease_parse_routes(
406 : const uint8_t *option, size_t len,
407 : struct sd_dhcp_route **routes, size_t *routes_size, size_t *routes_allocated) {
408 :
409 : struct in_addr addr;
410 :
411 0 : assert(option || len <= 0);
412 0 : assert(routes);
413 0 : assert(routes_size);
414 0 : assert(routes_allocated);
415 :
416 0 : if (len <= 0)
417 0 : return 0;
418 :
419 0 : if (len % 8 != 0)
420 0 : return -EINVAL;
421 :
422 0 : if (!GREEDY_REALLOC(*routes, *routes_allocated, *routes_size + (len / 8)))
423 0 : return -ENOMEM;
424 :
425 0 : while (len >= 8) {
426 0 : struct sd_dhcp_route *route = *routes + *routes_size;
427 : int r;
428 :
429 0 : route->option = SD_DHCP_OPTION_STATIC_ROUTE;
430 0 : r = in4_addr_default_prefixlen((struct in_addr*) option, &route->dst_prefixlen);
431 0 : if (r < 0) {
432 0 : log_debug("Failed to determine destination prefix length from class based IP, ignoring");
433 0 : continue;
434 : }
435 :
436 0 : assert_se(lease_parse_be32(option, 4, &addr.s_addr) >= 0);
437 0 : route->dst_addr = inet_makeaddr(inet_netof(addr), 0);
438 0 : option += 4;
439 :
440 0 : assert_se(lease_parse_be32(option, 4, &route->gw_addr.s_addr) >= 0);
441 0 : option += 4;
442 :
443 0 : len -= 8;
444 0 : (*routes_size)++;
445 : }
446 :
447 0 : return 0;
448 : }
449 :
450 : /* parses RFC3442 Classless Static Route Option */
451 0 : static int lease_parse_classless_routes(
452 : const uint8_t *option, size_t len,
453 : struct sd_dhcp_route **routes, size_t *routes_size, size_t *routes_allocated) {
454 :
455 0 : assert(option || len <= 0);
456 0 : assert(routes);
457 0 : assert(routes_size);
458 0 : assert(routes_allocated);
459 :
460 0 : if (len <= 0)
461 0 : return 0;
462 :
463 : /* option format: (subnet-mask-width significant-subnet-octets gateway-ip)* */
464 :
465 0 : while (len > 0) {
466 : uint8_t dst_octets;
467 : struct sd_dhcp_route *route;
468 :
469 0 : if (!GREEDY_REALLOC(*routes, *routes_allocated, *routes_size + 1))
470 0 : return -ENOMEM;
471 :
472 0 : route = *routes + *routes_size;
473 0 : route->option = SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE;
474 :
475 0 : dst_octets = (*option == 0 ? 0 : ((*option - 1) / 8) + 1);
476 0 : route->dst_prefixlen = *option;
477 0 : option++;
478 0 : len--;
479 :
480 : /* can't have more than 4 octets in IPv4 */
481 0 : if (dst_octets > 4 || len < dst_octets)
482 0 : return -EINVAL;
483 :
484 0 : route->dst_addr.s_addr = 0;
485 0 : memcpy(&route->dst_addr.s_addr, option, dst_octets);
486 0 : option += dst_octets;
487 0 : len -= dst_octets;
488 :
489 0 : if (len < 4)
490 0 : return -EINVAL;
491 :
492 0 : assert_se(lease_parse_be32(option, 4, &route->gw_addr.s_addr) >= 0);
493 0 : option += 4;
494 0 : len -= 4;
495 :
496 0 : (*routes_size)++;
497 : }
498 :
499 0 : return 0;
500 : }
501 :
502 6 : int dhcp_lease_parse_options(uint8_t code, uint8_t len, const void *option, void *userdata) {
503 6 : sd_dhcp_lease *lease = userdata;
504 : int r;
505 :
506 6 : assert(lease);
507 :
508 6 : switch(code) {
509 :
510 1 : case SD_DHCP_OPTION_IP_ADDRESS_LEASE_TIME:
511 1 : r = lease_parse_u32(option, len, &lease->lifetime, 1);
512 1 : if (r < 0)
513 0 : log_debug_errno(r, "Failed to parse lease time, ignoring: %m");
514 :
515 1 : break;
516 :
517 1 : case SD_DHCP_OPTION_SERVER_IDENTIFIER:
518 1 : r = lease_parse_be32(option, len, &lease->server_address);
519 1 : if (r < 0)
520 0 : log_debug_errno(r, "Failed to parse server identifier, ignoring: %m");
521 :
522 1 : break;
523 :
524 1 : case SD_DHCP_OPTION_SUBNET_MASK:
525 1 : r = lease_parse_be32(option, len, &lease->subnet_mask);
526 1 : if (r < 0)
527 0 : log_debug_errno(r, "Failed to parse subnet mask, ignoring: %m");
528 : else
529 1 : lease->have_subnet_mask = true;
530 1 : break;
531 :
532 0 : case SD_DHCP_OPTION_BROADCAST:
533 0 : r = lease_parse_be32(option, len, &lease->broadcast);
534 0 : if (r < 0)
535 0 : log_debug_errno(r, "Failed to parse broadcast address, ignoring: %m");
536 : else
537 0 : lease->have_broadcast = true;
538 0 : break;
539 :
540 1 : case SD_DHCP_OPTION_ROUTER:
541 1 : r = lease_parse_in_addrs(option, len, &lease->router, &lease->router_size);
542 1 : if (r < 0)
543 0 : log_debug_errno(r, "Failed to parse router addresses, ignoring: %m");
544 1 : break;
545 :
546 0 : case SD_DHCP_OPTION_DOMAIN_NAME_SERVER:
547 0 : r = lease_parse_in_addrs(option, len, &lease->dns, &lease->dns_size);
548 0 : if (r < 0)
549 0 : log_debug_errno(r, "Failed to parse DNS server, ignoring: %m");
550 0 : break;
551 :
552 1 : case SD_DHCP_OPTION_NTP_SERVER:
553 1 : r = lease_parse_in_addrs(option, len, &lease->ntp, &lease->ntp_size);
554 1 : if (r < 0)
555 0 : log_debug_errno(r, "Failed to parse NTP server, ignoring: %m");
556 1 : break;
557 :
558 0 : case SD_DHCP_OPTION_STATIC_ROUTE:
559 0 : r = lease_parse_routes(option, len, &lease->static_route, &lease->static_route_size, &lease->static_route_allocated);
560 0 : if (r < 0)
561 0 : log_debug_errno(r, "Failed to parse static routes, ignoring: %m");
562 0 : break;
563 :
564 0 : case SD_DHCP_OPTION_INTERFACE_MTU:
565 0 : r = lease_parse_u16(option, len, &lease->mtu, 68);
566 0 : if (r < 0)
567 0 : log_debug_errno(r, "Failed to parse MTU, ignoring: %m");
568 0 : if (lease->mtu < DHCP_DEFAULT_MIN_SIZE) {
569 0 : log_debug("MTU value of %" PRIu16 " too small. Using default MTU value of %d instead.", lease->mtu, DHCP_DEFAULT_MIN_SIZE);
570 0 : lease->mtu = DHCP_DEFAULT_MIN_SIZE;
571 : }
572 :
573 0 : break;
574 :
575 1 : case SD_DHCP_OPTION_DOMAIN_NAME:
576 1 : r = lease_parse_domain(option, len, &lease->domainname);
577 1 : if (r < 0) {
578 0 : log_debug_errno(r, "Failed to parse domain name, ignoring: %m");
579 0 : return 0;
580 : }
581 :
582 1 : break;
583 :
584 0 : case SD_DHCP_OPTION_DOMAIN_SEARCH_LIST:
585 0 : r = dhcp_lease_parse_search_domains(option, len, &lease->search_domains);
586 0 : if (r < 0)
587 0 : log_debug_errno(r, "Failed to parse Domain Search List, ignoring: %m");
588 0 : break;
589 :
590 0 : case SD_DHCP_OPTION_HOST_NAME:
591 0 : r = lease_parse_domain(option, len, &lease->hostname);
592 0 : if (r < 0) {
593 0 : log_debug_errno(r, "Failed to parse host name, ignoring: %m");
594 0 : return 0;
595 : }
596 :
597 0 : break;
598 :
599 0 : case SD_DHCP_OPTION_ROOT_PATH:
600 0 : r = lease_parse_string(option, len, &lease->root_path);
601 0 : if (r < 0)
602 0 : log_debug_errno(r, "Failed to parse root path, ignoring: %m");
603 0 : break;
604 :
605 0 : case SD_DHCP_OPTION_RENEWAL_T1_TIME:
606 0 : r = lease_parse_u32(option, len, &lease->t1, 1);
607 0 : if (r < 0)
608 0 : log_debug_errno(r, "Failed to parse T1 time, ignoring: %m");
609 0 : break;
610 :
611 0 : case SD_DHCP_OPTION_REBINDING_T2_TIME:
612 0 : r = lease_parse_u32(option, len, &lease->t2, 1);
613 0 : if (r < 0)
614 0 : log_debug_errno(r, "Failed to parse T2 time, ignoring: %m");
615 0 : break;
616 :
617 0 : case SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE:
618 0 : r = lease_parse_classless_routes(
619 : option, len,
620 : &lease->static_route,
621 : &lease->static_route_size,
622 : &lease->static_route_allocated);
623 0 : if (r < 0)
624 0 : log_debug_errno(r, "Failed to parse classless routes, ignoring: %m");
625 0 : break;
626 :
627 0 : case SD_DHCP_OPTION_NEW_TZDB_TIMEZONE: {
628 0 : _cleanup_free_ char *tz = NULL;
629 :
630 0 : r = lease_parse_string(option, len, &tz);
631 0 : if (r < 0) {
632 0 : log_debug_errno(r, "Failed to parse timezone option, ignoring: %m");
633 0 : return 0;
634 : }
635 :
636 0 : if (!timezone_is_valid(tz, LOG_DEBUG)) {
637 0 : log_debug_errno(r, "Timezone is not valid, ignoring: %m");
638 0 : return 0;
639 : }
640 :
641 0 : free_and_replace(lease->timezone, tz);
642 :
643 0 : break;
644 : }
645 :
646 0 : case SD_DHCP_OPTION_VENDOR_SPECIFIC:
647 :
648 0 : if (len <= 0)
649 0 : lease->vendor_specific = mfree(lease->vendor_specific);
650 : else {
651 : void *p;
652 :
653 0 : p = memdup(option, len);
654 0 : if (!p)
655 0 : return -ENOMEM;
656 :
657 0 : free(lease->vendor_specific);
658 0 : lease->vendor_specific = p;
659 : }
660 :
661 0 : lease->vendor_specific_len = len;
662 0 : break;
663 :
664 0 : case SD_DHCP_OPTION_PRIVATE_BASE ... SD_DHCP_OPTION_PRIVATE_LAST:
665 0 : r = dhcp_lease_insert_private_option(lease, code, option, len);
666 0 : if (r < 0)
667 0 : return r;
668 :
669 0 : break;
670 :
671 0 : default:
672 0 : log_debug("Ignoring option DHCP option %"PRIu8" while parsing.", code);
673 0 : break;
674 : }
675 :
676 6 : return 0;
677 : }
678 :
679 : /* Parses compressed domain names. */
680 7 : int dhcp_lease_parse_search_domains(const uint8_t *option, size_t len, char ***domains) {
681 7 : _cleanup_strv_free_ char **names = NULL;
682 7 : size_t pos = 0, cnt = 0;
683 : int r;
684 :
685 7 : assert(domains);
686 7 : assert_return(option && len > 0, -ENODATA);
687 :
688 13 : while (pos < len) {
689 10 : _cleanup_free_ char *name = NULL;
690 10 : size_t n = 0, allocated = 0;
691 10 : size_t jump_barrier = pos, next_chunk = 0;
692 10 : bool first = true;
693 :
694 16 : for (;;) {
695 : uint8_t c;
696 26 : c = option[pos++];
697 :
698 26 : if (c == 0) {
699 : /* End of name */
700 8 : break;
701 18 : } else if (c <= 63) {
702 : const char *label;
703 :
704 : /* Literal label */
705 15 : label = (const char*) (option + pos);
706 15 : pos += c;
707 15 : if (pos >= len)
708 1 : return -EBADMSG;
709 :
710 14 : if (!GREEDY_REALLOC(name, allocated, n + !first + DNS_LABEL_ESCAPED_MAX))
711 0 : return -ENOMEM;
712 :
713 14 : if (first)
714 9 : first = false;
715 : else
716 5 : name[n++] = '.';
717 :
718 14 : r = dns_label_escape(label, c, name + n, DNS_LABEL_ESCAPED_MAX);
719 14 : if (r < 0)
720 0 : return r;
721 :
722 14 : n += r;
723 3 : } else if ((c & 0xc0) == 0xc0) {
724 : /* Pointer */
725 :
726 : uint8_t d;
727 : uint16_t ptr;
728 :
729 3 : if (pos >= len)
730 0 : return -EBADMSG;
731 :
732 3 : d = option[pos++];
733 3 : ptr = (uint16_t) (c & ~0xc0) << 8 | (uint16_t) d;
734 :
735 : /* Jumps are limited to a "prior occurrence" (RFC-1035 4.1.4) */
736 3 : if (ptr >= jump_barrier)
737 1 : return -EBADMSG;
738 2 : jump_barrier = ptr;
739 :
740 : /* Save current location so we don't end up re-parsing what's parsed so far. */
741 2 : if (next_chunk == 0)
742 2 : next_chunk = pos;
743 :
744 2 : pos = ptr;
745 : } else
746 0 : return -EBADMSG;
747 : }
748 :
749 8 : if (!GREEDY_REALLOC(name, allocated, n + 1))
750 0 : return -ENOMEM;
751 8 : name[n] = 0;
752 :
753 8 : r = strv_extend(&names, name);
754 8 : if (r < 0)
755 0 : return r;
756 :
757 8 : cnt++;
758 :
759 8 : if (next_chunk != 0)
760 2 : pos = next_chunk;
761 : }
762 :
763 3 : *domains = TAKE_PTR(names);
764 :
765 3 : return cnt;
766 : }
767 :
768 0 : int dhcp_lease_insert_private_option(sd_dhcp_lease *lease, uint8_t tag, const void *data, uint8_t len) {
769 : struct sd_dhcp_raw_option *cur, *option;
770 :
771 0 : assert(lease);
772 :
773 0 : LIST_FOREACH(options, cur, lease->private_options) {
774 0 : if (tag < cur->tag)
775 0 : break;
776 0 : if (tag == cur->tag) {
777 0 : log_debug("Ignoring duplicate option, tagged %i.", tag);
778 0 : return 0;
779 : }
780 : }
781 :
782 0 : option = new(struct sd_dhcp_raw_option, 1);
783 0 : if (!option)
784 0 : return -ENOMEM;
785 :
786 0 : option->tag = tag;
787 0 : option->length = len;
788 0 : option->data = memdup(data, len);
789 0 : if (!option->data) {
790 0 : free(option);
791 0 : return -ENOMEM;
792 : }
793 :
794 0 : LIST_INSERT_BEFORE(options, lease->private_options, cur, option);
795 0 : return 0;
796 : }
797 :
798 1 : int dhcp_lease_new(sd_dhcp_lease **ret) {
799 : sd_dhcp_lease *lease;
800 :
801 1 : lease = new0(sd_dhcp_lease, 1);
802 1 : if (!lease)
803 0 : return -ENOMEM;
804 :
805 1 : lease->n_ref = 1;
806 :
807 1 : *ret = lease;
808 1 : return 0;
809 : }
810 :
811 0 : int dhcp_lease_save(sd_dhcp_lease *lease, const char *lease_file) {
812 0 : _cleanup_free_ char *temp_path = NULL;
813 0 : _cleanup_fclose_ FILE *f = NULL;
814 : struct sd_dhcp_raw_option *option;
815 : struct in_addr address;
816 : const struct in_addr *addresses;
817 : const void *client_id, *data;
818 : size_t client_id_len, data_len;
819 : char sbuf[INET_ADDRSTRLEN];
820 : const char *string;
821 : uint16_t mtu;
822 0 : _cleanup_free_ sd_dhcp_route **routes = NULL;
823 0 : char **search_domains = NULL;
824 : uint32_t t1, t2, lifetime;
825 : int r;
826 :
827 0 : assert(lease);
828 0 : assert(lease_file);
829 :
830 0 : r = fopen_temporary(lease_file, &f, &temp_path);
831 0 : if (r < 0)
832 0 : goto fail;
833 :
834 0 : (void) fchmod(fileno(f), 0644);
835 :
836 0 : fprintf(f,
837 : "# This is private data. Do not parse.\n");
838 :
839 0 : r = sd_dhcp_lease_get_address(lease, &address);
840 0 : if (r >= 0)
841 0 : fprintf(f, "ADDRESS=%s\n", inet_ntop(AF_INET, &address, sbuf, sizeof(sbuf)));
842 :
843 0 : r = sd_dhcp_lease_get_netmask(lease, &address);
844 0 : if (r >= 0)
845 0 : fprintf(f, "NETMASK=%s\n", inet_ntop(AF_INET, &address, sbuf, sizeof(sbuf)));
846 :
847 0 : r = sd_dhcp_lease_get_router(lease, &addresses);
848 0 : if (r > 0) {
849 0 : fputs("ROUTER=", f);
850 0 : serialize_in_addrs(f, addresses, r, false, NULL);
851 0 : fputc('\n', f);
852 : }
853 :
854 0 : r = sd_dhcp_lease_get_server_identifier(lease, &address);
855 0 : if (r >= 0)
856 0 : fprintf(f, "SERVER_ADDRESS=%s\n", inet_ntop(AF_INET, &address, sbuf, sizeof(sbuf)));
857 :
858 0 : r = sd_dhcp_lease_get_next_server(lease, &address);
859 0 : if (r >= 0)
860 0 : fprintf(f, "NEXT_SERVER=%s\n", inet_ntop(AF_INET, &address, sbuf, sizeof(sbuf)));
861 :
862 0 : r = sd_dhcp_lease_get_broadcast(lease, &address);
863 0 : if (r >= 0)
864 0 : fprintf(f, "BROADCAST=%s\n", inet_ntop(AF_INET, &address, sbuf, sizeof(sbuf)));
865 :
866 0 : r = sd_dhcp_lease_get_mtu(lease, &mtu);
867 0 : if (r >= 0)
868 0 : fprintf(f, "MTU=%" PRIu16 "\n", mtu);
869 :
870 0 : r = sd_dhcp_lease_get_t1(lease, &t1);
871 0 : if (r >= 0)
872 0 : fprintf(f, "T1=%" PRIu32 "\n", t1);
873 :
874 0 : r = sd_dhcp_lease_get_t2(lease, &t2);
875 0 : if (r >= 0)
876 0 : fprintf(f, "T2=%" PRIu32 "\n", t2);
877 :
878 0 : r = sd_dhcp_lease_get_lifetime(lease, &lifetime);
879 0 : if (r >= 0)
880 0 : fprintf(f, "LIFETIME=%" PRIu32 "\n", lifetime);
881 :
882 0 : r = sd_dhcp_lease_get_dns(lease, &addresses);
883 0 : if (r > 0) {
884 0 : fputs("DNS=", f);
885 0 : serialize_in_addrs(f, addresses, r, false, NULL);
886 0 : fputc('\n', f);
887 : }
888 :
889 0 : r = sd_dhcp_lease_get_ntp(lease, &addresses);
890 0 : if (r > 0) {
891 0 : fputs("NTP=", f);
892 0 : serialize_in_addrs(f, addresses, r, false, NULL);
893 0 : fputc('\n', f);
894 : }
895 :
896 0 : r = sd_dhcp_lease_get_domainname(lease, &string);
897 0 : if (r >= 0)
898 0 : fprintf(f, "DOMAINNAME=%s\n", string);
899 :
900 0 : r = sd_dhcp_lease_get_search_domains(lease, &search_domains);
901 0 : if (r > 0) {
902 0 : fputs("DOMAIN_SEARCH_LIST=", f);
903 0 : fputstrv(f, search_domains, NULL, NULL);
904 0 : fputc('\n', f);
905 : }
906 :
907 0 : r = sd_dhcp_lease_get_hostname(lease, &string);
908 0 : if (r >= 0)
909 0 : fprintf(f, "HOSTNAME=%s\n", string);
910 :
911 0 : r = sd_dhcp_lease_get_root_path(lease, &string);
912 0 : if (r >= 0)
913 0 : fprintf(f, "ROOT_PATH=%s\n", string);
914 :
915 0 : r = sd_dhcp_lease_get_routes(lease, &routes);
916 0 : if (r > 0)
917 0 : serialize_dhcp_routes(f, "ROUTES", routes, r);
918 :
919 0 : r = sd_dhcp_lease_get_timezone(lease, &string);
920 0 : if (r >= 0)
921 0 : fprintf(f, "TIMEZONE=%s\n", string);
922 :
923 0 : r = sd_dhcp_lease_get_client_id(lease, &client_id, &client_id_len);
924 0 : if (r >= 0) {
925 0 : _cleanup_free_ char *client_id_hex = NULL;
926 :
927 0 : client_id_hex = hexmem(client_id, client_id_len);
928 0 : if (!client_id_hex) {
929 0 : r = -ENOMEM;
930 0 : goto fail;
931 : }
932 0 : fprintf(f, "CLIENTID=%s\n", client_id_hex);
933 : }
934 :
935 0 : r = sd_dhcp_lease_get_vendor_specific(lease, &data, &data_len);
936 0 : if (r >= 0) {
937 0 : _cleanup_free_ char *option_hex = NULL;
938 :
939 0 : option_hex = hexmem(data, data_len);
940 0 : if (!option_hex) {
941 0 : r = -ENOMEM;
942 0 : goto fail;
943 : }
944 0 : fprintf(f, "VENDOR_SPECIFIC=%s\n", option_hex);
945 : }
946 :
947 0 : LIST_FOREACH(options, option, lease->private_options) {
948 : char key[STRLEN("OPTION_000")+1];
949 :
950 0 : xsprintf(key, "OPTION_%" PRIu8, option->tag);
951 0 : r = serialize_dhcp_option(f, key, option->data, option->length);
952 0 : if (r < 0)
953 0 : goto fail;
954 : }
955 :
956 0 : r = fflush_and_check(f);
957 0 : if (r < 0)
958 0 : goto fail;
959 :
960 0 : if (rename(temp_path, lease_file) < 0) {
961 0 : r = -errno;
962 0 : goto fail;
963 : }
964 :
965 0 : return 0;
966 :
967 0 : fail:
968 0 : if (temp_path)
969 0 : (void) unlink(temp_path);
970 :
971 0 : return log_error_errno(r, "Failed to save lease data %s: %m", lease_file);
972 : }
973 :
974 0 : int dhcp_lease_load(sd_dhcp_lease **ret, const char *lease_file) {
975 :
976 0 : _cleanup_(sd_dhcp_lease_unrefp) sd_dhcp_lease *lease = NULL;
977 : _cleanup_free_ char
978 0 : *address = NULL,
979 0 : *router = NULL,
980 0 : *netmask = NULL,
981 0 : *server_address = NULL,
982 0 : *next_server = NULL,
983 0 : *broadcast = NULL,
984 0 : *dns = NULL,
985 0 : *ntp = NULL,
986 0 : *mtu = NULL,
987 0 : *routes = NULL,
988 0 : *domains = NULL,
989 0 : *client_id_hex = NULL,
990 0 : *vendor_specific_hex = NULL,
991 0 : *lifetime = NULL,
992 0 : *t1 = NULL,
993 0 : *t2 = NULL,
994 0 : *options[SD_DHCP_OPTION_PRIVATE_LAST - SD_DHCP_OPTION_PRIVATE_BASE + 1] = {};
995 :
996 : int r, i;
997 :
998 0 : assert(lease_file);
999 0 : assert(ret);
1000 :
1001 0 : r = dhcp_lease_new(&lease);
1002 0 : if (r < 0)
1003 0 : return r;
1004 :
1005 0 : r = parse_env_file(NULL, lease_file,
1006 : "ADDRESS", &address,
1007 : "ROUTER", &router,
1008 : "NETMASK", &netmask,
1009 : "SERVER_IDENTIFIER", &server_address,
1010 : "NEXT_SERVER", &next_server,
1011 : "BROADCAST", &broadcast,
1012 : "DNS", &dns,
1013 : "NTP", &ntp,
1014 : "MTU", &mtu,
1015 : "DOMAINNAME", &lease->domainname,
1016 : "HOSTNAME", &lease->hostname,
1017 : "DOMAIN_SEARCH_LIST", &domains,
1018 : "ROOT_PATH", &lease->root_path,
1019 : "ROUTES", &routes,
1020 : "CLIENTID", &client_id_hex,
1021 : "TIMEZONE", &lease->timezone,
1022 : "VENDOR_SPECIFIC", &vendor_specific_hex,
1023 : "LIFETIME", &lifetime,
1024 : "T1", &t1,
1025 : "T2", &t2,
1026 : "OPTION_224", &options[0],
1027 : "OPTION_225", &options[1],
1028 : "OPTION_226", &options[2],
1029 : "OPTION_227", &options[3],
1030 : "OPTION_228", &options[4],
1031 : "OPTION_229", &options[5],
1032 : "OPTION_230", &options[6],
1033 : "OPTION_231", &options[7],
1034 : "OPTION_232", &options[8],
1035 : "OPTION_233", &options[9],
1036 : "OPTION_234", &options[10],
1037 : "OPTION_235", &options[11],
1038 : "OPTION_236", &options[12],
1039 : "OPTION_237", &options[13],
1040 : "OPTION_238", &options[14],
1041 : "OPTION_239", &options[15],
1042 : "OPTION_240", &options[16],
1043 : "OPTION_241", &options[17],
1044 : "OPTION_242", &options[18],
1045 : "OPTION_243", &options[19],
1046 : "OPTION_244", &options[20],
1047 : "OPTION_245", &options[21],
1048 : "OPTION_246", &options[22],
1049 : "OPTION_247", &options[23],
1050 : "OPTION_248", &options[24],
1051 : "OPTION_249", &options[25],
1052 : "OPTION_250", &options[26],
1053 : "OPTION_251", &options[27],
1054 : "OPTION_252", &options[28],
1055 : "OPTION_253", &options[29],
1056 : "OPTION_254", &options[30]);
1057 0 : if (r < 0)
1058 0 : return r;
1059 :
1060 0 : if (address) {
1061 0 : r = inet_pton(AF_INET, address, &lease->address);
1062 0 : if (r <= 0)
1063 0 : log_debug("Failed to parse address %s, ignoring.", address);
1064 : }
1065 :
1066 0 : if (router) {
1067 0 : r = deserialize_in_addrs(&lease->router, router);
1068 0 : if (r < 0)
1069 0 : log_debug_errno(r, "Failed to deserialize router addresses %s, ignoring: %m", router);
1070 : else
1071 0 : lease->router_size = r;
1072 : }
1073 :
1074 0 : if (netmask) {
1075 0 : r = inet_pton(AF_INET, netmask, &lease->subnet_mask);
1076 0 : if (r <= 0)
1077 0 : log_debug("Failed to parse netmask %s, ignoring.", netmask);
1078 : else
1079 0 : lease->have_subnet_mask = true;
1080 : }
1081 :
1082 0 : if (server_address) {
1083 0 : r = inet_pton(AF_INET, server_address, &lease->server_address);
1084 0 : if (r <= 0)
1085 0 : log_debug("Failed to parse server address %s, ignoring.", server_address);
1086 : }
1087 :
1088 0 : if (next_server) {
1089 0 : r = inet_pton(AF_INET, next_server, &lease->next_server);
1090 0 : if (r <= 0)
1091 0 : log_debug("Failed to parse next server %s, ignoring.", next_server);
1092 : }
1093 :
1094 0 : if (broadcast) {
1095 0 : r = inet_pton(AF_INET, broadcast, &lease->broadcast);
1096 0 : if (r <= 0)
1097 0 : log_debug("Failed to parse broadcast address %s, ignoring.", broadcast);
1098 : else
1099 0 : lease->have_broadcast = true;
1100 : }
1101 :
1102 0 : if (dns) {
1103 0 : r = deserialize_in_addrs(&lease->dns, dns);
1104 0 : if (r < 0)
1105 0 : log_debug_errno(r, "Failed to deserialize DNS servers %s, ignoring: %m", dns);
1106 : else
1107 0 : lease->dns_size = r;
1108 : }
1109 :
1110 0 : if (ntp) {
1111 0 : r = deserialize_in_addrs(&lease->ntp, ntp);
1112 0 : if (r < 0)
1113 0 : log_debug_errno(r, "Failed to deserialize NTP servers %s, ignoring: %m", ntp);
1114 : else
1115 0 : lease->ntp_size = r;
1116 : }
1117 :
1118 0 : if (mtu) {
1119 0 : r = safe_atou16(mtu, &lease->mtu);
1120 0 : if (r < 0)
1121 0 : log_debug_errno(r, "Failed to parse MTU %s, ignoring: %m", mtu);
1122 : }
1123 :
1124 0 : if (domains) {
1125 0 : _cleanup_strv_free_ char **a = NULL;
1126 0 : a = strv_split(domains, " ");
1127 0 : if (!a)
1128 0 : return -ENOMEM;
1129 :
1130 0 : if (!strv_isempty(a)) {
1131 0 : lease->search_domains = a;
1132 0 : a = NULL;
1133 : }
1134 : }
1135 :
1136 0 : if (routes) {
1137 0 : r = deserialize_dhcp_routes(
1138 0 : &lease->static_route,
1139 0 : &lease->static_route_size,
1140 0 : &lease->static_route_allocated,
1141 : routes);
1142 0 : if (r < 0)
1143 0 : log_debug_errno(r, "Failed to parse DHCP routes %s, ignoring: %m", routes);
1144 : }
1145 :
1146 0 : if (lifetime) {
1147 0 : r = safe_atou32(lifetime, &lease->lifetime);
1148 0 : if (r < 0)
1149 0 : log_debug_errno(r, "Failed to parse lifetime %s, ignoring: %m", lifetime);
1150 : }
1151 :
1152 0 : if (t1) {
1153 0 : r = safe_atou32(t1, &lease->t1);
1154 0 : if (r < 0)
1155 0 : log_debug_errno(r, "Failed to parse T1 %s, ignoring: %m", t1);
1156 : }
1157 :
1158 0 : if (t2) {
1159 0 : r = safe_atou32(t2, &lease->t2);
1160 0 : if (r < 0)
1161 0 : log_debug_errno(r, "Failed to parse T2 %s, ignoring: %m", t2);
1162 : }
1163 :
1164 0 : if (client_id_hex) {
1165 0 : r = unhexmem(client_id_hex, (size_t) -1, &lease->client_id, &lease->client_id_len);
1166 0 : if (r < 0)
1167 0 : log_debug_errno(r, "Failed to parse client ID %s, ignoring: %m", client_id_hex);
1168 : }
1169 :
1170 0 : if (vendor_specific_hex) {
1171 0 : r = unhexmem(vendor_specific_hex, (size_t) -1, &lease->vendor_specific, &lease->vendor_specific_len);
1172 0 : if (r < 0)
1173 0 : log_debug_errno(r, "Failed to parse vendor specific data %s, ignoring: %m", vendor_specific_hex);
1174 : }
1175 :
1176 0 : for (i = 0; i <= SD_DHCP_OPTION_PRIVATE_LAST - SD_DHCP_OPTION_PRIVATE_BASE; i++) {
1177 0 : _cleanup_free_ void *data = NULL;
1178 : size_t len;
1179 :
1180 0 : if (!options[i])
1181 0 : continue;
1182 :
1183 0 : r = unhexmem(options[i], (size_t) -1, &data, &len);
1184 0 : if (r < 0) {
1185 0 : log_debug_errno(r, "Failed to parse private DHCP option %s, ignoring: %m", options[i]);
1186 0 : continue;
1187 : }
1188 :
1189 0 : r = dhcp_lease_insert_private_option(lease, SD_DHCP_OPTION_PRIVATE_BASE + i, data, len);
1190 0 : if (r < 0)
1191 0 : return r;
1192 : }
1193 :
1194 0 : *ret = TAKE_PTR(lease);
1195 :
1196 0 : return 0;
1197 : }
1198 :
1199 0 : int dhcp_lease_set_default_subnet_mask(sd_dhcp_lease *lease) {
1200 : struct in_addr address, mask;
1201 : int r;
1202 :
1203 0 : assert(lease);
1204 :
1205 0 : if (lease->address == 0)
1206 0 : return -ENODATA;
1207 :
1208 0 : address.s_addr = lease->address;
1209 :
1210 : /* fall back to the default subnet masks based on address class */
1211 0 : r = in4_addr_default_subnet_mask(&address, &mask);
1212 0 : if (r < 0)
1213 0 : return r;
1214 :
1215 0 : lease->subnet_mask = mask.s_addr;
1216 0 : lease->have_subnet_mask = true;
1217 :
1218 0 : return 0;
1219 : }
1220 :
1221 0 : int sd_dhcp_lease_get_client_id(sd_dhcp_lease *lease, const void **client_id, size_t *client_id_len) {
1222 0 : assert_return(lease, -EINVAL);
1223 0 : assert_return(client_id, -EINVAL);
1224 0 : assert_return(client_id_len, -EINVAL);
1225 :
1226 0 : if (!lease->client_id)
1227 0 : return -ENODATA;
1228 :
1229 0 : *client_id = lease->client_id;
1230 0 : *client_id_len = lease->client_id_len;
1231 :
1232 0 : return 0;
1233 : }
1234 :
1235 1 : int dhcp_lease_set_client_id(sd_dhcp_lease *lease, const void *client_id, size_t client_id_len) {
1236 1 : assert_return(lease, -EINVAL);
1237 1 : assert_return(client_id || client_id_len <= 0, -EINVAL);
1238 :
1239 1 : if (client_id_len <= 0)
1240 0 : lease->client_id = mfree(lease->client_id);
1241 : else {
1242 : void *p;
1243 :
1244 1 : p = memdup(client_id, client_id_len);
1245 1 : if (!p)
1246 0 : return -ENOMEM;
1247 :
1248 1 : free(lease->client_id);
1249 1 : lease->client_id = p;
1250 1 : lease->client_id_len = client_id_len;
1251 : }
1252 :
1253 1 : return 0;
1254 : }
1255 :
1256 0 : int sd_dhcp_lease_get_timezone(sd_dhcp_lease *lease, const char **tz) {
1257 0 : assert_return(lease, -EINVAL);
1258 0 : assert_return(tz, -EINVAL);
1259 :
1260 0 : if (!lease->timezone)
1261 0 : return -ENODATA;
1262 :
1263 0 : *tz = lease->timezone;
1264 0 : return 0;
1265 : }
1266 :
1267 0 : int sd_dhcp_route_get_destination(sd_dhcp_route *route, struct in_addr *destination) {
1268 0 : assert_return(route, -EINVAL);
1269 0 : assert_return(destination, -EINVAL);
1270 :
1271 0 : *destination = route->dst_addr;
1272 0 : return 0;
1273 : }
1274 :
1275 0 : int sd_dhcp_route_get_destination_prefix_length(sd_dhcp_route *route, uint8_t *length) {
1276 0 : assert_return(route, -EINVAL);
1277 0 : assert_return(length, -EINVAL);
1278 :
1279 0 : *length = route->dst_prefixlen;
1280 0 : return 0;
1281 : }
1282 :
1283 0 : int sd_dhcp_route_get_gateway(sd_dhcp_route *route, struct in_addr *gateway) {
1284 0 : assert_return(route, -EINVAL);
1285 0 : assert_return(gateway, -EINVAL);
1286 :
1287 0 : *gateway = route->gw_addr;
1288 0 : return 0;
1289 : }
1290 :
1291 0 : int sd_dhcp_route_get_option(sd_dhcp_route *route) {
1292 0 : assert_return(route, -EINVAL);
1293 :
1294 0 : return route->option;
1295 : }
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