]> git.ipfire.org Git - thirdparty/systemd.git/blob - src/libsystemd-network/sd-dhcp-lease.c
projects / thirdparty / systemd.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
tree-wide: use ASSERT_PTR more
[thirdparty/systemd.git] / src / libsystemd-network / sd-dhcp-lease.c
1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
2 /***
3 Copyright © 2013 Intel Corporation. All rights reserved.
4 ***/
5
6 #include <arpa/inet.h>
7 #include <errno.h>
8 #include <stdlib.h>
9 #include <sys/stat.h>
10 #include <sys/types.h>
11 #include <unistd.h>
12
13 #include "sd-dhcp-lease.h"
14
15 #include "alloc-util.h"
16 #include "dhcp-lease-internal.h"
17 #include "dhcp-protocol.h"
18 #include "dns-domain.h"
19 #include "env-file.h"
20 #include "fd-util.h"
21 #include "fileio.h"
22 #include "fs-util.h"
23 #include "hexdecoct.h"
24 #include "hostname-util.h"
25 #include "in-addr-util.h"
26 #include "network-internal.h"
27 #include "parse-util.h"
28 #include "stdio-util.h"
29 #include "string-util.h"
30 #include "strv.h"
31 #include "tmpfile-util.h"
32 #include "unaligned.h"
33
34 int sd_dhcp_lease_get_address(sd_dhcp_lease *lease, struct in_addr *addr) {
35 assert_return(lease, -EINVAL);
36 assert_return(addr, -EINVAL);
37
38 if (lease->address == 0)
39 return -ENODATA;
40
41 addr->s_addr = lease->address;
42 return 0;
43 }
44
45 int sd_dhcp_lease_get_broadcast(sd_dhcp_lease *lease, struct in_addr *addr) {
46 assert_return(lease, -EINVAL);
47 assert_return(addr, -EINVAL);
48
49 if (!lease->have_broadcast)
50 return -ENODATA;
51
52 addr->s_addr = lease->broadcast;
53 return 0;
54 }
55
56 int sd_dhcp_lease_get_lifetime(sd_dhcp_lease *lease, uint32_t *lifetime) {
57 assert_return(lease, -EINVAL);
58 assert_return(lifetime, -EINVAL);
59
60 if (lease->lifetime <= 0)
61 return -ENODATA;
62
63 *lifetime = lease->lifetime;
64 return 0;
65 }
66
67 int sd_dhcp_lease_get_t1(sd_dhcp_lease *lease, uint32_t *t1) {
68 assert_return(lease, -EINVAL);
69 assert_return(t1, -EINVAL);
70
71 if (lease->t1 <= 0)
72 return -ENODATA;
73
74 *t1 = lease->t1;
75 return 0;
76 }
77
78 int sd_dhcp_lease_get_t2(sd_dhcp_lease *lease, uint32_t *t2) {
79 assert_return(lease, -EINVAL);
80 assert_return(t2, -EINVAL);
81
82 if (lease->t2 <= 0)
83 return -ENODATA;
84
85 *t2 = lease->t2;
86 return 0;
87 }
88
89 int sd_dhcp_lease_get_mtu(sd_dhcp_lease *lease, uint16_t *mtu) {
90 assert_return(lease, -EINVAL);
91 assert_return(mtu, -EINVAL);
92
93 if (lease->mtu <= 0)
94 return -ENODATA;
95
96 *mtu = lease->mtu;
97 return 0;
98 }
99
100 int sd_dhcp_lease_get_servers(
101 sd_dhcp_lease *lease,
102 sd_dhcp_lease_server_type_t what,
103 const struct in_addr **addr) {
104
105 assert_return(lease, -EINVAL);
106 assert_return(what >= 0, -EINVAL);
107 assert_return(what < _SD_DHCP_LEASE_SERVER_TYPE_MAX, -EINVAL);
108
109 if (lease->servers[what].size <= 0)
110 return -ENODATA;
111
112 if (addr)
113 *addr = lease->servers[what].addr;
114
115 return (int) lease->servers[what].size;
116 }
117
118 int sd_dhcp_lease_get_dns(sd_dhcp_lease *lease, const struct in_addr **addr) {
119 return sd_dhcp_lease_get_servers(lease, SD_DHCP_LEASE_DNS, addr);
120 }
121 int sd_dhcp_lease_get_ntp(sd_dhcp_lease *lease, const struct in_addr **addr) {
122 return sd_dhcp_lease_get_servers(lease, SD_DHCP_LEASE_NTP, addr);
123 }
124 int sd_dhcp_lease_get_sip(sd_dhcp_lease *lease, const struct in_addr **addr) {
125 return sd_dhcp_lease_get_servers(lease, SD_DHCP_LEASE_SIP, addr);
126 }
127 int sd_dhcp_lease_get_pop3(sd_dhcp_lease *lease, const struct in_addr **addr) {
128 return sd_dhcp_lease_get_servers(lease, SD_DHCP_LEASE_POP3, addr);
129 }
130 int sd_dhcp_lease_get_smtp(sd_dhcp_lease *lease, const struct in_addr **addr) {
131 return sd_dhcp_lease_get_servers(lease, SD_DHCP_LEASE_SMTP, addr);
132 }
133 int sd_dhcp_lease_get_lpr(sd_dhcp_lease *lease, const struct in_addr **addr) {
134 return sd_dhcp_lease_get_servers(lease, SD_DHCP_LEASE_LPR, addr);
135 }
136
137 int sd_dhcp_lease_get_domainname(sd_dhcp_lease *lease, const char **domainname) {
138 assert_return(lease, -EINVAL);
139 assert_return(domainname, -EINVAL);
140
141 if (!lease->domainname)
142 return -ENODATA;
143
144 *domainname = lease->domainname;
145 return 0;
146 }
147
148 int sd_dhcp_lease_get_hostname(sd_dhcp_lease *lease, const char **hostname) {
149 assert_return(lease, -EINVAL);
150 assert_return(hostname, -EINVAL);
151
152 if (!lease->hostname)
153 return -ENODATA;
154
155 *hostname = lease->hostname;
156 return 0;
157 }
158
159 int sd_dhcp_lease_get_root_path(sd_dhcp_lease *lease, const char **root_path) {
160 assert_return(lease, -EINVAL);
161 assert_return(root_path, -EINVAL);
162
163 if (!lease->root_path)
164 return -ENODATA;
165
166 *root_path = lease->root_path;
167 return 0;
168 }
169
170 int sd_dhcp_lease_get_router(sd_dhcp_lease *lease, const struct in_addr **addr) {
171 assert_return(lease, -EINVAL);
172 assert_return(addr, -EINVAL);
173
174 if (lease->router_size <= 0)
175 return -ENODATA;
176
177 *addr = lease->router;
178 return (int) lease->router_size;
179 }
180
181 int sd_dhcp_lease_get_netmask(sd_dhcp_lease *lease, struct in_addr *addr) {
182 assert_return(lease, -EINVAL);
183 assert_return(addr, -EINVAL);
184
185 if (!lease->have_subnet_mask)
186 return -ENODATA;
187
188 addr->s_addr = lease->subnet_mask;
189 return 0;
190 }
191
192 int sd_dhcp_lease_get_server_identifier(sd_dhcp_lease *lease, struct in_addr *addr) {
193 assert_return(lease, -EINVAL);
194 assert_return(addr, -EINVAL);
195
196 if (lease->server_address == 0)
197 return -ENODATA;
198
199 addr->s_addr = lease->server_address;
200 return 0;
201 }
202
203 int sd_dhcp_lease_get_next_server(sd_dhcp_lease *lease, struct in_addr *addr) {
204 assert_return(lease, -EINVAL);
205 assert_return(addr, -EINVAL);
206
207 if (lease->next_server == 0)
208 return -ENODATA;
209
210 addr->s_addr = lease->next_server;
211 return 0;
212 }
213
214 /*
215 * The returned routes array must be freed by the caller.
216 * Route objects have the same lifetime of the lease and must not be freed.
217 */
218 static int dhcp_lease_get_routes(sd_dhcp_route *routes, size_t n_routes, sd_dhcp_route ***ret) {
219 assert(routes || n_routes == 0);
220
221 if (n_routes <= 0)
222 return -ENODATA;
223
224 if (ret) {
225 sd_dhcp_route **buf;
226
227 buf = new(sd_dhcp_route*, n_routes);
228 if (!buf)
229 return -ENOMEM;
230
231 for (size_t i = 0; i < n_routes; i++)
232 buf[i] = &routes[i];
233
234 *ret = buf;
235 }
236
237 return (int) n_routes;
238 }
239
240 int sd_dhcp_lease_get_static_routes(sd_dhcp_lease *lease, sd_dhcp_route ***ret) {
241 assert_return(lease, -EINVAL);
242
243 return dhcp_lease_get_routes(lease->static_routes, lease->n_static_routes, ret);
244 }
245
246 int sd_dhcp_lease_get_classless_routes(sd_dhcp_lease *lease, sd_dhcp_route ***ret) {
247 assert_return(lease, -EINVAL);
248
249 return dhcp_lease_get_routes(lease->classless_routes, lease->n_classless_routes, ret);
250 }
251
252 int sd_dhcp_lease_get_search_domains(sd_dhcp_lease *lease, char ***domains) {
253 size_t r;
254
255 assert_return(lease, -EINVAL);
256 assert_return(domains, -EINVAL);
257
258 r = strv_length(lease->search_domains);
259 if (r > 0) {
260 *domains = lease->search_domains;
261 return (int) r;
262 }
263
264 return -ENODATA;
265 }
266
267 int sd_dhcp_lease_get_6rd(
268 sd_dhcp_lease *lease,
269 uint8_t *ret_ipv4masklen,
270 uint8_t *ret_prefixlen,
271 struct in6_addr *ret_prefix,
272 const struct in_addr **ret_br_addresses,
273 size_t *ret_n_br_addresses) {
274
275 assert_return(lease, -EINVAL);
276
277 if (lease->sixrd_n_br_addresses <= 0)
278 return -ENODATA;
279
280 if (ret_ipv4masklen)
281 *ret_ipv4masklen = lease->sixrd_ipv4masklen;
282 if (ret_prefixlen)
283 *ret_prefixlen = lease->sixrd_prefixlen;
284 if (ret_prefix)
285 *ret_prefix = lease->sixrd_prefix;
286 if (ret_br_addresses)
287 *ret_br_addresses = lease->sixrd_br_addresses;
288 if (ret_n_br_addresses)
289 *ret_n_br_addresses = lease->sixrd_n_br_addresses;
290
291 return 0;
292 }
293
294 int sd_dhcp_lease_get_vendor_specific(sd_dhcp_lease *lease, const void **data, size_t *data_len) {
295 assert_return(lease, -EINVAL);
296 assert_return(data, -EINVAL);
297 assert_return(data_len, -EINVAL);
298
299 if (lease->vendor_specific_len <= 0)
300 return -ENODATA;
301
302 *data = lease->vendor_specific;
303 *data_len = lease->vendor_specific_len;
304 return 0;
305 }
306
307 static sd_dhcp_lease *dhcp_lease_free(sd_dhcp_lease *lease) {
308 assert(lease);
309
310 while (lease->private_options) {
311 struct sd_dhcp_raw_option *option = lease->private_options;
312
313 LIST_REMOVE(options, lease->private_options, option);
314
315 free(option->data);
316 free(option);
317 }
318
319 free(lease->root_path);
320 free(lease->router);
321 free(lease->timezone);
322 free(lease->hostname);
323 free(lease->domainname);
324
325 for (sd_dhcp_lease_server_type_t i = 0; i < _SD_DHCP_LEASE_SERVER_TYPE_MAX; i++)
326 free(lease->servers[i].addr);
327
328 free(lease->static_routes);
329 free(lease->classless_routes);
330 free(lease->client_id);
331 free(lease->vendor_specific);
332 strv_free(lease->search_domains);
333 free(lease->sixrd_br_addresses);
334 return mfree(lease);
335 }
336
337 DEFINE_TRIVIAL_REF_UNREF_FUNC(sd_dhcp_lease, sd_dhcp_lease, dhcp_lease_free);
338
339 static int lease_parse_u32(const uint8_t *option, size_t len, uint32_t *ret, uint32_t min) {
340 assert(option);
341 assert(ret);
342
343 if (len != 4)
344 return -EINVAL;
345
346 *ret = unaligned_read_be32((be32_t*) option);
347 if (*ret < min)
348 *ret = min;
349
350 return 0;
351 }
352
353 static int lease_parse_u16(const uint8_t *option, size_t len, uint16_t *ret, uint16_t min) {
354 assert(option);
355 assert(ret);
356
357 if (len != 2)
358 return -EINVAL;
359
360 *ret = unaligned_read_be16((be16_t*) option);
361 if (*ret < min)
362 *ret = min;
363
364 return 0;
365 }
366
367 static int lease_parse_be32(const uint8_t *option, size_t len, be32_t *ret) {
368 assert(option);
369 assert(ret);
370
371 if (len != 4)
372 return -EINVAL;
373
374 memcpy(ret, option, 4);
375 return 0;
376 }
377
378 static int lease_parse_string(const uint8_t *option, size_t len, char **ret) {
379 assert(option);
380 assert(ret);
381
382 if (len <= 0)
383 *ret = mfree(*ret);
384 else {
385 char *string;
386
387 /*
388 * One trailing NUL byte is OK, we don't mind. See:
389 * https://github.com/systemd/systemd/issues/1337
390 */
391 if (memchr(option, 0, len - 1))
392 return -EINVAL;
393
394 string = memdup_suffix0((const char *) option, len);
395 if (!string)
396 return -ENOMEM;
397
398 free_and_replace(*ret, string);
399 }
400
401 return 0;
402 }
403
404 static int lease_parse_domain(const uint8_t *option, size_t len, char **ret) {
405 _cleanup_free_ char *name = NULL, *normalized = NULL;
406 int r;
407
408 assert(option);
409 assert(ret);
410
411 r = lease_parse_string(option, len, &name);
412 if (r < 0)
413 return r;
414 if (!name) {
415 *ret = mfree(*ret);
416 return 0;
417 }
418
419 r = dns_name_normalize(name, 0, &normalized);
420 if (r < 0)
421 return r;
422
423 if (is_localhost(normalized))
424 return -EINVAL;
425
426 if (dns_name_is_root(normalized))
427 return -EINVAL;
428
429 free_and_replace(*ret, normalized);
430
431 return 0;
432 }
433
434 static int lease_parse_in_addrs(const uint8_t *option, size_t len, struct in_addr **ret, size_t *n_ret) {
435 assert(option || len == 0);
436 assert(ret);
437 assert(n_ret);
438
439 if (len <= 0) {
440 *ret = mfree(*ret);
441 *n_ret = 0;
442 } else {
443 size_t n_addresses;
444 struct in_addr *addresses;
445
446 if (len % 4 != 0)
447 return -EINVAL;
448
449 n_addresses = len / 4;
450
451 addresses = newdup(struct in_addr, option, n_addresses);
452 if (!addresses)
453 return -ENOMEM;
454
455 free(*ret);
456 *ret = addresses;
457 *n_ret = n_addresses;
458 }
459
460 return 0;
461 }
462
463 static int lease_parse_sip_server(const uint8_t *option, size_t len, struct in_addr **ret, size_t *n_ret) {
464 assert(option || len == 0);
465 assert(ret);
466 assert(n_ret);
467
468 if (len <= 0)
469 return -EINVAL;
470
471 /* The SIP record is like the other, regular server records, but prefixed with a single "encoding"
472 * byte that is either 0 or 1. We only support it to be 1 for now. Let's drop it and parse it like
473 * the other fields */
474
475 if (option[0] != 1) { /* We only support IP address encoding for now */
476 *ret = mfree(*ret);
477 *n_ret = 0;
478 return 0;
479 }
480
481 return lease_parse_in_addrs(option + 1, len - 1, ret, n_ret);
482 }
483
484 static int lease_parse_static_routes(sd_dhcp_lease *lease, const uint8_t *option, size_t len) {
485 int r;
486
487 assert(lease);
488 assert(option || len <= 0);
489
490 if (len % 8 != 0)
491 return -EINVAL;
492
493 while (len >= 8) {
494 struct in_addr dst, gw;
495 uint8_t prefixlen;
496
497 assert_se(lease_parse_be32(option, 4, &dst.s_addr) >= 0);
498 option += 4;
499
500 assert_se(lease_parse_be32(option, 4, &gw.s_addr) >= 0);
501 option += 4;
502
503 len -= 8;
504
505 r = in4_addr_default_prefixlen(&dst, &prefixlen);
506 if (r < 0) {
507 log_debug("sd-dhcp-lease: cannot determine class of received static route, ignoring.");
508 continue;
509 }
510
511 (void) in4_addr_mask(&dst, prefixlen);
512
513 if (!GREEDY_REALLOC(lease->static_routes, lease->n_static_routes + 1))
514 return -ENOMEM;
515
516 lease->static_routes[lease->n_static_routes++] = (struct sd_dhcp_route) {
517 .dst_addr = dst,
518 .gw_addr = gw,
519 .dst_prefixlen = prefixlen,
520 };
521 }
522
523 return 0;
524 }
525
526 /* parses RFC3442 Classless Static Route Option */
527 static int lease_parse_classless_routes(sd_dhcp_lease *lease, const uint8_t *option, size_t len) {
528 assert(lease);
529 assert(option || len <= 0);
530
531 /* option format: (subnet-mask-width significant-subnet-octets gateway-ip) */
532
533 while (len > 0) {
534 uint8_t prefixlen, dst_octets;
535 struct in_addr dst = {}, gw;
536
537 prefixlen = *option;
538 option++;
539 len--;
540
541 dst_octets = DIV_ROUND_UP(prefixlen, 8);
542
543 /* can't have more than 4 octets in IPv4 */
544 if (dst_octets > 4 || len < dst_octets)
545 return -EINVAL;
546
547 memcpy(&dst, option, dst_octets);
548 option += dst_octets;
549 len -= dst_octets;
550
551 if (len < 4)
552 return -EINVAL;
553
554 assert_se(lease_parse_be32(option, 4, &gw.s_addr) >= 0);
555 option += 4;
556 len -= 4;
557
558 if (!GREEDY_REALLOC(lease->classless_routes, lease->n_classless_routes + 1))
559 return -ENOMEM;
560
561 lease->classless_routes[lease->n_classless_routes++] = (struct sd_dhcp_route) {
562 .dst_addr = dst,
563 .gw_addr = gw,
564 .dst_prefixlen = prefixlen,
565 };
566 }
567
568 return 0;
569 }
570
571 static int lease_parse_6rd(sd_dhcp_lease *lease, const uint8_t *option, size_t len) {
572 uint8_t ipv4masklen, prefixlen;
573 struct in6_addr prefix;
574 _cleanup_free_ struct in_addr *br_addresses = NULL;
575 size_t n_br_addresses;
576
577 assert(lease);
578 assert(option);
579
580 /* See RFC 5969 Section 7.1.1 */
581
582 if (lease->sixrd_n_br_addresses > 0)
583 /* Multiple 6rd option?? */
584 return -EINVAL;
585
586 /* option-length: The length of the DHCP option in octets (22 octets with one BR IPv4 address). */
587 if (len < 2 + sizeof(struct in6_addr) + sizeof(struct in_addr) ||
588 (len - 2 - sizeof(struct in6_addr)) % sizeof(struct in_addr) != 0)
589 return -EINVAL;
590
591 /* IPv4MaskLen: The number of high-order bits that are identical across all CE IPv4 addresses
592 * within a given 6rd domain. This may be any value between 0 and 32. Any value
593 * greater than 32 is invalid. */
594 ipv4masklen = option[0];
595 if (ipv4masklen > 32)
596 return -EINVAL;
597
598 /* 6rdPrefixLen: The IPv6 prefix length of the SP's 6rd IPv6 prefix in number of bits. For the
599 * purpose of bounds checking by DHCP option processing, the sum of
600 * (32 - IPv4MaskLen) + 6rdPrefixLen MUST be less than or equal to 128. */
601 prefixlen = option[1];
602 if (32 - ipv4masklen + prefixlen > 128)
603 return -EINVAL;
604
605 /* 6rdPrefix: The service provider's 6rd IPv6 prefix represented as a 16-octet IPv6 address.
606 * The bits in the prefix after the 6rdPrefixlen number of bits are reserved and
607 * MUST be initialized to zero by the sender and ignored by the receiver. */
608 memcpy(&prefix, option + 2, sizeof(struct in6_addr));
609 (void) in6_addr_mask(&prefix, prefixlen);
610
611 /* 6rdBRIPv4Address: One or more IPv4 addresses of the 6rd Border Relay(s) for a given 6rd domain. */
612 n_br_addresses = (len - 2 - sizeof(struct in6_addr)) / sizeof(struct in_addr);
613 br_addresses = newdup(struct in_addr, option + 2 + sizeof(struct in6_addr), n_br_addresses);
614 if (!br_addresses)
615 return -ENOMEM;
616
617 lease->sixrd_ipv4masklen = ipv4masklen;
618 lease->sixrd_prefixlen = prefixlen;
619 lease->sixrd_prefix = prefix;
620 lease->sixrd_br_addresses = TAKE_PTR(br_addresses);
621 lease->sixrd_n_br_addresses = n_br_addresses;
622
623 return 0;
624 }
625
626 int dhcp_lease_parse_options(uint8_t code, uint8_t len, const void *option, void *userdata) {
627 sd_dhcp_lease *lease = ASSERT_PTR(userdata);
628 int r;
629
630 switch (code) {
631
632 case SD_DHCP_OPTION_IP_ADDRESS_LEASE_TIME:
633 r = lease_parse_u32(option, len, &lease->lifetime, 1);
634 if (r < 0)
635 log_debug_errno(r, "Failed to parse lease time, ignoring: %m");
636
637 break;
638
639 case SD_DHCP_OPTION_SERVER_IDENTIFIER:
640 r = lease_parse_be32(option, len, &lease->server_address);
641 if (r < 0)
642 log_debug_errno(r, "Failed to parse server identifier, ignoring: %m");
643
644 break;
645
646 case SD_DHCP_OPTION_SUBNET_MASK:
647 r = lease_parse_be32(option, len, &lease->subnet_mask);
648 if (r < 0)
649 log_debug_errno(r, "Failed to parse subnet mask, ignoring: %m");
650 else
651 lease->have_subnet_mask = true;
652 break;
653
654 case SD_DHCP_OPTION_BROADCAST:
655 r = lease_parse_be32(option, len, &lease->broadcast);
656 if (r < 0)
657 log_debug_errno(r, "Failed to parse broadcast address, ignoring: %m");
658 else
659 lease->have_broadcast = true;
660 break;
661
662 case SD_DHCP_OPTION_ROUTER:
663 r = lease_parse_in_addrs(option, len, &lease->router, &lease->router_size);
664 if (r < 0)
665 log_debug_errno(r, "Failed to parse router addresses, ignoring: %m");
666 break;
667
668 case SD_DHCP_OPTION_DOMAIN_NAME_SERVER:
669 r = lease_parse_in_addrs(option, len, &lease->servers[SD_DHCP_LEASE_DNS].addr, &lease->servers[SD_DHCP_LEASE_DNS].size);
670 if (r < 0)
671 log_debug_errno(r, "Failed to parse DNS server, ignoring: %m");
672 break;
673
674 case SD_DHCP_OPTION_NTP_SERVER:
675 r = lease_parse_in_addrs(option, len, &lease->servers[SD_DHCP_LEASE_NTP].addr, &lease->servers[SD_DHCP_LEASE_NTP].size);
676 if (r < 0)
677 log_debug_errno(r, "Failed to parse NTP server, ignoring: %m");
678 break;
679
680 case SD_DHCP_OPTION_SIP_SERVER:
681 r = lease_parse_sip_server(option, len, &lease->servers[SD_DHCP_LEASE_SIP].addr, &lease->servers[SD_DHCP_LEASE_SIP].size);
682 if (r < 0)
683 log_debug_errno(r, "Failed to parse SIP server, ignoring: %m");
684 break;
685
686 case SD_DHCP_OPTION_POP3_SERVER:
687 r = lease_parse_in_addrs(option, len, &lease->servers[SD_DHCP_LEASE_POP3].addr, &lease->servers[SD_DHCP_LEASE_POP3].size);
688 if (r < 0)
689 log_debug_errno(r, "Failed to parse POP3 server, ignoring: %m");
690 break;
691
692 case SD_DHCP_OPTION_SMTP_SERVER:
693 r = lease_parse_in_addrs(option, len, &lease->servers[SD_DHCP_LEASE_SMTP].addr, &lease->servers[SD_DHCP_LEASE_SMTP].size);
694 if (r < 0)
695 log_debug_errno(r, "Failed to parse SMTP server, ignoring: %m");
696 break;
697
698 case SD_DHCP_OPTION_LPR_SERVER:
699 r = lease_parse_in_addrs(option, len, &lease->servers[SD_DHCP_LEASE_LPR].addr, &lease->servers[SD_DHCP_LEASE_LPR].size);
700 if (r < 0)
701 log_debug_errno(r, "Failed to parse LPR server, ignoring: %m");
702 break;
703
704 case SD_DHCP_OPTION_STATIC_ROUTE:
705 r = lease_parse_static_routes(lease, option, len);
706 if (r < 0)
707 log_debug_errno(r, "Failed to parse static routes, ignoring: %m");
708 break;
709
710 case SD_DHCP_OPTION_MTU_INTERFACE:
711 r = lease_parse_u16(option, len, &lease->mtu, 68);
712 if (r < 0)
713 log_debug_errno(r, "Failed to parse MTU, ignoring: %m");
714 if (lease->mtu < DHCP_MIN_PACKET_SIZE) {
715 log_debug("MTU value of %" PRIu16 " too small. Using default MTU value of %d instead.", lease->mtu, DHCP_MIN_PACKET_SIZE);
716 lease->mtu = DHCP_MIN_PACKET_SIZE;
717 }
718
719 break;
720
721 case SD_DHCP_OPTION_DOMAIN_NAME:
722 r = lease_parse_domain(option, len, &lease->domainname);
723 if (r < 0) {
724 log_debug_errno(r, "Failed to parse domain name, ignoring: %m");
725 return 0;
726 }
727
728 break;
729
730 case SD_DHCP_OPTION_DOMAIN_SEARCH:
731 r = dhcp_lease_parse_search_domains(option, len, &lease->search_domains);
732 if (r < 0)
733 log_debug_errno(r, "Failed to parse Domain Search List, ignoring: %m");
734 break;
735
736 case SD_DHCP_OPTION_HOST_NAME:
737 r = lease_parse_domain(option, len, &lease->hostname);
738 if (r < 0) {
739 log_debug_errno(r, "Failed to parse hostname, ignoring: %m");
740 return 0;
741 }
742
743 break;
744
745 case SD_DHCP_OPTION_ROOT_PATH:
746 r = lease_parse_string(option, len, &lease->root_path);
747 if (r < 0)
748 log_debug_errno(r, "Failed to parse root path, ignoring: %m");
749 break;
750
751 case SD_DHCP_OPTION_RENEWAL_TIME:
752 r = lease_parse_u32(option, len, &lease->t1, 1);
753 if (r < 0)
754 log_debug_errno(r, "Failed to parse T1 time, ignoring: %m");
755 break;
756
757 case SD_DHCP_OPTION_REBINDING_TIME:
758 r = lease_parse_u32(option, len, &lease->t2, 1);
759 if (r < 0)
760 log_debug_errno(r, "Failed to parse T2 time, ignoring: %m");
761 break;
762
763 case SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE:
764 r = lease_parse_classless_routes(lease, option, len);
765 if (r < 0)
766 log_debug_errno(r, "Failed to parse classless routes, ignoring: %m");
767 break;
768
769 case SD_DHCP_OPTION_TZDB_TIMEZONE: {
770 _cleanup_free_ char *tz = NULL;
771
772 r = lease_parse_string(option, len, &tz);
773 if (r < 0) {
774 log_debug_errno(r, "Failed to parse timezone option, ignoring: %m");
775 return 0;
776 }
777
778 if (!timezone_is_valid(tz, LOG_DEBUG)) {
779 log_debug("Timezone is not valid, ignoring.");
780 return 0;
781 }
782
783 free_and_replace(lease->timezone, tz);
784
785 break;
786 }
787
788 case SD_DHCP_OPTION_VENDOR_SPECIFIC:
789
790 if (len <= 0)
791 lease->vendor_specific = mfree(lease->vendor_specific);
792 else {
793 void *p;
794
795 p = memdup(option, len);
796 if (!p)
797 return -ENOMEM;
798
799 free(lease->vendor_specific);
800 lease->vendor_specific = p;
801 }
802
803 lease->vendor_specific_len = len;
804 break;
805
806 case SD_DHCP_OPTION_6RD:
807 r = lease_parse_6rd(lease, option, len);
808 if (r < 0)
809 log_debug_errno(r, "Failed to parse 6rd option, ignoring: %m");
810 break;
811
812 case SD_DHCP_OPTION_PRIVATE_BASE ... SD_DHCP_OPTION_PRIVATE_LAST:
813 r = dhcp_lease_insert_private_option(lease, code, option, len);
814 if (r < 0)
815 return r;
816
817 break;
818
819 default:
820 log_debug("Ignoring DHCP option %"PRIu8" while parsing.", code);
821 break;
822 }
823
824 return 0;
825 }
826
827 /* Parses compressed domain names. */
828 int dhcp_lease_parse_search_domains(const uint8_t *option, size_t len, char ***domains) {
829 _cleanup_strv_free_ char **names = NULL;
830 size_t pos = 0, cnt = 0;
831 int r;
832
833 assert(domains);
834 assert_return(option && len > 0, -ENODATA);
835
836 while (pos < len) {
837 _cleanup_free_ char *name = NULL;
838 size_t n = 0;
839 size_t jump_barrier = pos, next_chunk = 0;
840 bool first = true;
841
842 for (;;) {
843 uint8_t c;
844 c = option[pos++];
845
846 if (c == 0) {
847 /* End of name */
848 break;
849 } else if (c <= 63) {
850 const char *label;
851
852 /* Literal label */
853 label = (const char*) (option + pos);
854 pos += c;
855 if (pos >= len)
856 return -EBADMSG;
857
858 if (!GREEDY_REALLOC(name, n + !first + DNS_LABEL_ESCAPED_MAX))
859 return -ENOMEM;
860
861 if (first)
862 first = false;
863 else
864 name[n++] = '.';
865
866 r = dns_label_escape(label, c, name + n, DNS_LABEL_ESCAPED_MAX);
867 if (r < 0)
868 return r;
869
870 n += r;
871 } else if (FLAGS_SET(c, 0xc0)) {
872 /* Pointer */
873
874 uint8_t d;
875 uint16_t ptr;
876
877 if (pos >= len)
878 return -EBADMSG;
879
880 d = option[pos++];
881 ptr = (uint16_t) (c & ~0xc0) << 8 | (uint16_t) d;
882
883 /* Jumps are limited to a "prior occurrence" (RFC-1035 4.1.4) */
884 if (ptr >= jump_barrier)
885 return -EBADMSG;
886 jump_barrier = ptr;
887
888 /* Save current location so we don't end up re-parsing what's parsed so far. */
889 if (next_chunk == 0)
890 next_chunk = pos;
891
892 pos = ptr;
893 } else
894 return -EBADMSG;
895 }
896
897 if (!GREEDY_REALLOC(name, n + 1))
898 return -ENOMEM;
899 name[n] = 0;
900
901 r = strv_extend(&names, name);
902 if (r < 0)
903 return r;
904
905 cnt++;
906
907 if (next_chunk != 0)
908 pos = next_chunk;
909 }
910
911 strv_free_and_replace(*domains, names);
912
913 return cnt;
914 }
915
916 int dhcp_lease_insert_private_option(sd_dhcp_lease *lease, uint8_t tag, const void *data, uint8_t len) {
917 struct sd_dhcp_raw_option *option, *before = NULL;
918
919 assert(lease);
920
921 LIST_FOREACH(options, cur, lease->private_options) {
922 if (tag < cur->tag) {
923 before = cur;
924 break;
925 }
926 if (tag == cur->tag) {
927 log_debug("Ignoring duplicate option, tagged %i.", tag);
928 return 0;
929 }
930 }
931
932 option = new(struct sd_dhcp_raw_option, 1);
933 if (!option)
934 return -ENOMEM;
935
936 option->tag = tag;
937 option->length = len;
938 option->data = memdup(data, len);
939 if (!option->data) {
940 free(option);
941 return -ENOMEM;
942 }
943
944 LIST_INSERT_BEFORE(options, lease->private_options, before, option);
945 return 0;
946 }
947
948 int dhcp_lease_new(sd_dhcp_lease **ret) {
949 sd_dhcp_lease *lease;
950
951 lease = new0(sd_dhcp_lease, 1);
952 if (!lease)
953 return -ENOMEM;
954
955 lease->n_ref = 1;
956
957 *ret = lease;
958 return 0;
959 }
960
961 int dhcp_lease_save(sd_dhcp_lease *lease, const char *lease_file) {
962 _cleanup_(unlink_and_freep) char *temp_path = NULL;
963 _cleanup_fclose_ FILE *f = NULL;
964 struct in_addr address;
965 const struct in_addr *addresses;
966 const void *client_id, *data;
967 size_t client_id_len, data_len;
968 const char *string;
969 uint16_t mtu;
970 _cleanup_free_ sd_dhcp_route **routes = NULL;
971 char **search_domains;
972 uint32_t t1, t2, lifetime;
973 int r;
974
975 assert(lease);
976 assert(lease_file);
977
978 r = fopen_temporary(lease_file, &f, &temp_path);
979 if (r < 0)
980 return r;
981
982 (void) fchmod(fileno(f), 0644);
983
984 fprintf(f,
985 "# This is private data. Do not parse.\n");
986
987 r = sd_dhcp_lease_get_address(lease, &address);
988 if (r >= 0)
989 fprintf(f, "ADDRESS=%s\n", IN4_ADDR_TO_STRING(&address));
990
991 r = sd_dhcp_lease_get_netmask(lease, &address);
992 if (r >= 0)
993 fprintf(f, "NETMASK=%s\n", IN4_ADDR_TO_STRING(&address));
994
995 r = sd_dhcp_lease_get_router(lease, &addresses);
996 if (r > 0) {
997 fputs("ROUTER=", f);
998 serialize_in_addrs(f, addresses, r, false, NULL);
999 fputc('\n', f);
1000 }
1001
1002 r = sd_dhcp_lease_get_server_identifier(lease, &address);
1003 if (r >= 0)
1004 fprintf(f, "SERVER_ADDRESS=%s\n", IN4_ADDR_TO_STRING(&address));
1005
1006 r = sd_dhcp_lease_get_next_server(lease, &address);
1007 if (r >= 0)
1008 fprintf(f, "NEXT_SERVER=%s\n", IN4_ADDR_TO_STRING(&address));
1009
1010 r = sd_dhcp_lease_get_broadcast(lease, &address);
1011 if (r >= 0)
1012 fprintf(f, "BROADCAST=%s\n", IN4_ADDR_TO_STRING(&address));
1013
1014 r = sd_dhcp_lease_get_mtu(lease, &mtu);
1015 if (r >= 0)
1016 fprintf(f, "MTU=%" PRIu16 "\n", mtu);
1017
1018 r = sd_dhcp_lease_get_t1(lease, &t1);
1019 if (r >= 0)
1020 fprintf(f, "T1=%" PRIu32 "\n", t1);
1021
1022 r = sd_dhcp_lease_get_t2(lease, &t2);
1023 if (r >= 0)
1024 fprintf(f, "T2=%" PRIu32 "\n", t2);
1025
1026 r = sd_dhcp_lease_get_lifetime(lease, &lifetime);
1027 if (r >= 0)
1028 fprintf(f, "LIFETIME=%" PRIu32 "\n", lifetime);
1029
1030 r = sd_dhcp_lease_get_dns(lease, &addresses);
1031 if (r > 0) {
1032 fputs("DNS=", f);
1033 serialize_in_addrs(f, addresses, r, false, NULL);
1034 fputc('\n', f);
1035 }
1036
1037 r = sd_dhcp_lease_get_ntp(lease, &addresses);
1038 if (r > 0) {
1039 fputs("NTP=", f);
1040 serialize_in_addrs(f, addresses, r, false, NULL);
1041 fputc('\n', f);
1042 }
1043
1044 r = sd_dhcp_lease_get_sip(lease, &addresses);
1045 if (r > 0) {
1046 fputs("SIP=", f);
1047 serialize_in_addrs(f, addresses, r, false, NULL);
1048 fputc('\n', f);
1049 }
1050
1051 r = sd_dhcp_lease_get_domainname(lease, &string);
1052 if (r >= 0)
1053 fprintf(f, "DOMAINNAME=%s\n", string);
1054
1055 r = sd_dhcp_lease_get_search_domains(lease, &search_domains);
1056 if (r > 0) {
1057 fputs("DOMAIN_SEARCH_LIST=", f);
1058 fputstrv(f, search_domains, NULL, NULL);
1059 fputc('\n', f);
1060 }
1061
1062 r = sd_dhcp_lease_get_hostname(lease, &string);
1063 if (r >= 0)
1064 fprintf(f, "HOSTNAME=%s\n", string);
1065
1066 r = sd_dhcp_lease_get_root_path(lease, &string);
1067 if (r >= 0)
1068 fprintf(f, "ROOT_PATH=%s\n", string);
1069
1070 r = sd_dhcp_lease_get_static_routes(lease, &routes);
1071 if (r > 0)
1072 serialize_dhcp_routes(f, "STATIC_ROUTES", routes, r);
1073
1074 routes = mfree(routes);
1075 r = sd_dhcp_lease_get_classless_routes(lease, &routes);
1076 if (r > 0)
1077 serialize_dhcp_routes(f, "CLASSLESS_ROUTES", routes, r);
1078
1079 r = sd_dhcp_lease_get_timezone(lease, &string);
1080 if (r >= 0)
1081 fprintf(f, "TIMEZONE=%s\n", string);
1082
1083 r = sd_dhcp_lease_get_client_id(lease, &client_id, &client_id_len);
1084 if (r >= 0) {
1085 _cleanup_free_ char *client_id_hex = NULL;
1086
1087 client_id_hex = hexmem(client_id, client_id_len);
1088 if (!client_id_hex)
1089 return -ENOMEM;
1090 fprintf(f, "CLIENTID=%s\n", client_id_hex);
1091 }
1092
1093 r = sd_dhcp_lease_get_vendor_specific(lease, &data, &data_len);
1094 if (r >= 0) {
1095 _cleanup_free_ char *option_hex = NULL;
1096
1097 option_hex = hexmem(data, data_len);
1098 if (!option_hex)
1099 return -ENOMEM;
1100 fprintf(f, "VENDOR_SPECIFIC=%s\n", option_hex);
1101 }
1102
1103 LIST_FOREACH(options, option, lease->private_options) {
1104 char key[STRLEN("OPTION_000")+1];
1105
1106 xsprintf(key, "OPTION_%" PRIu8, option->tag);
1107 r = serialize_dhcp_option(f, key, option->data, option->length);
1108 if (r < 0)
1109 return r;
1110 }
1111
1112 r = fflush_and_check(f);
1113 if (r < 0)
1114 return r;
1115
1116 r = conservative_rename(temp_path, lease_file);
1117 if (r < 0)
1118 return r;
1119
1120 temp_path = mfree(temp_path);
1121
1122 return 0;
1123 }
1124
1125 static char **private_options_free(char **options) {
1126 if (!options)
1127 return NULL;
1128
1129 for (unsigned i = 0; i < SD_DHCP_OPTION_PRIVATE_LAST - SD_DHCP_OPTION_PRIVATE_BASE + 1; i++)
1130 free(options[i]);
1131
1132 return mfree(options);
1133 }
1134
1135 DEFINE_TRIVIAL_CLEANUP_FUNC(char**, private_options_free);
1136
1137 int dhcp_lease_load(sd_dhcp_lease **ret, const char *lease_file) {
1138 _cleanup_(sd_dhcp_lease_unrefp) sd_dhcp_lease *lease = NULL;
1139 _cleanup_free_ char
1140 *address = NULL,
1141 *router = NULL,
1142 *netmask = NULL,
1143 *server_address = NULL,
1144 *next_server = NULL,
1145 *broadcast = NULL,
1146 *dns = NULL,
1147 *ntp = NULL,
1148 *sip = NULL,
1149 *pop3 = NULL,
1150 *smtp = NULL,
1151 *lpr = NULL,
1152 *mtu = NULL,
1153 *static_routes = NULL,
1154 *classless_routes = NULL,
1155 *domains = NULL,
1156 *client_id_hex = NULL,
1157 *vendor_specific_hex = NULL,
1158 *lifetime = NULL,
1159 *t1 = NULL,
1160 *t2 = NULL;
1161 _cleanup_(private_options_freep) char **options = NULL;
1162
1163 int r, i;
1164
1165 assert(lease_file);
1166 assert(ret);
1167
1168 r = dhcp_lease_new(&lease);
1169 if (r < 0)
1170 return r;
1171
1172 options = new0(char*, SD_DHCP_OPTION_PRIVATE_LAST - SD_DHCP_OPTION_PRIVATE_BASE + 1);
1173 if (!options)
1174 return -ENOMEM;
1175
1176 r = parse_env_file(NULL, lease_file,
1177 "ADDRESS", &address,
1178 "ROUTER", &router,
1179 "NETMASK", &netmask,
1180 "SERVER_ADDRESS", &server_address,
1181 "NEXT_SERVER", &next_server,
1182 "BROADCAST", &broadcast,
1183 "DNS", &dns,
1184 "NTP", &ntp,
1185 "SIP", &sip,
1186 "POP3", &pop3,
1187 "SMTP", &smtp,
1188 "LPR", &lpr,
1189 "MTU", &mtu,
1190 "DOMAINNAME", &lease->domainname,
1191 "HOSTNAME", &lease->hostname,
1192 "DOMAIN_SEARCH_LIST", &domains,
1193 "ROOT_PATH", &lease->root_path,
1194 "STATIC_ROUTES", &static_routes,
1195 "CLASSLESS_ROUTES", &classless_routes,
1196 "CLIENTID", &client_id_hex,
1197 "TIMEZONE", &lease->timezone,
1198 "VENDOR_SPECIFIC", &vendor_specific_hex,
1199 "LIFETIME", &lifetime,
1200 "T1", &t1,
1201 "T2", &t2,
1202 "OPTION_224", &options[0],
1203 "OPTION_225", &options[1],
1204 "OPTION_226", &options[2],
1205 "OPTION_227", &options[3],
1206 "OPTION_228", &options[4],
1207 "OPTION_229", &options[5],
1208 "OPTION_230", &options[6],
1209 "OPTION_231", &options[7],
1210 "OPTION_232", &options[8],
1211 "OPTION_233", &options[9],
1212 "OPTION_234", &options[10],
1213 "OPTION_235", &options[11],
1214 "OPTION_236", &options[12],
1215 "OPTION_237", &options[13],
1216 "OPTION_238", &options[14],
1217 "OPTION_239", &options[15],
1218 "OPTION_240", &options[16],
1219 "OPTION_241", &options[17],
1220 "OPTION_242", &options[18],
1221 "OPTION_243", &options[19],
1222 "OPTION_244", &options[20],
1223 "OPTION_245", &options[21],
1224 "OPTION_246", &options[22],
1225 "OPTION_247", &options[23],
1226 "OPTION_248", &options[24],
1227 "OPTION_249", &options[25],
1228 "OPTION_250", &options[26],
1229 "OPTION_251", &options[27],
1230 "OPTION_252", &options[28],
1231 "OPTION_253", &options[29],
1232 "OPTION_254", &options[30]);
1233 if (r < 0)
1234 return r;
1235
1236 if (address) {
1237 r = inet_pton(AF_INET, address, &lease->address);
1238 if (r <= 0)
1239 log_debug("Failed to parse address %s, ignoring.", address);
1240 }
1241
1242 if (router) {
1243 r = deserialize_in_addrs(&lease->router, router);
1244 if (r < 0)
1245 log_debug_errno(r, "Failed to deserialize router addresses %s, ignoring: %m", router);
1246 else
1247 lease->router_size = r;
1248 }
1249
1250 if (netmask) {
1251 r = inet_pton(AF_INET, netmask, &lease->subnet_mask);
1252 if (r <= 0)
1253 log_debug("Failed to parse netmask %s, ignoring.", netmask);
1254 else
1255 lease->have_subnet_mask = true;
1256 }
1257
1258 if (server_address) {
1259 r = inet_pton(AF_INET, server_address, &lease->server_address);
1260 if (r <= 0)
1261 log_debug("Failed to parse server address %s, ignoring.", server_address);
1262 }
1263
1264 if (next_server) {
1265 r = inet_pton(AF_INET, next_server, &lease->next_server);
1266 if (r <= 0)
1267 log_debug("Failed to parse next server %s, ignoring.", next_server);
1268 }
1269
1270 if (broadcast) {
1271 r = inet_pton(AF_INET, broadcast, &lease->broadcast);
1272 if (r <= 0)
1273 log_debug("Failed to parse broadcast address %s, ignoring.", broadcast);
1274 else
1275 lease->have_broadcast = true;
1276 }
1277
1278 if (dns) {
1279 r = deserialize_in_addrs(&lease->servers[SD_DHCP_LEASE_DNS].addr, dns);
1280 if (r < 0)
1281 log_debug_errno(r, "Failed to deserialize DNS servers %s, ignoring: %m", dns);
1282 else
1283 lease->servers[SD_DHCP_LEASE_DNS].size = r;
1284 }
1285
1286 if (ntp) {
1287 r = deserialize_in_addrs(&lease->servers[SD_DHCP_LEASE_NTP].addr, ntp);
1288 if (r < 0)
1289 log_debug_errno(r, "Failed to deserialize NTP servers %s, ignoring: %m", ntp);
1290 else
1291 lease->servers[SD_DHCP_LEASE_NTP].size = r;
1292 }
1293
1294 if (sip) {
1295 r = deserialize_in_addrs(&lease->servers[SD_DHCP_LEASE_SIP].addr, sip);
1296 if (r < 0)
1297 log_debug_errno(r, "Failed to deserialize SIP servers %s, ignoring: %m", sip);
1298 else
1299 lease->servers[SD_DHCP_LEASE_SIP].size = r;
1300 }
1301
1302 if (pop3) {
1303 r = deserialize_in_addrs(&lease->servers[SD_DHCP_LEASE_POP3].addr, pop3);
1304 if (r < 0)
1305 log_debug_errno(r, "Failed to deserialize POP3 server %s, ignoring: %m", pop3);
1306 else
1307 lease->servers[SD_DHCP_LEASE_POP3].size = r;
1308 }
1309
1310 if (smtp) {
1311 r = deserialize_in_addrs(&lease->servers[SD_DHCP_LEASE_SMTP].addr, smtp);
1312 if (r < 0)
1313 log_debug_errno(r, "Failed to deserialize SMTP server %s, ignoring: %m", smtp);
1314 else
1315 lease->servers[SD_DHCP_LEASE_SMTP].size = r;
1316 }
1317
1318 if (lpr) {
1319 r = deserialize_in_addrs(&lease->servers[SD_DHCP_LEASE_LPR].addr, lpr);
1320 if (r < 0)
1321 log_debug_errno(r, "Failed to deserialize LPR server %s, ignoring: %m", lpr);
1322 else
1323 lease->servers[SD_DHCP_LEASE_LPR].size = r;
1324 }
1325
1326 if (mtu) {
1327 r = safe_atou16(mtu, &lease->mtu);
1328 if (r < 0)
1329 log_debug_errno(r, "Failed to parse MTU %s, ignoring: %m", mtu);
1330 }
1331
1332 if (domains) {
1333 _cleanup_strv_free_ char **a = NULL;
1334 a = strv_split(domains, " ");
1335 if (!a)
1336 return -ENOMEM;
1337
1338 if (!strv_isempty(a))
1339 lease->search_domains = TAKE_PTR(a);
1340 }
1341
1342 if (static_routes) {
1343 r = deserialize_dhcp_routes(
1344 &lease->static_routes,
1345 &lease->n_static_routes,
1346 static_routes);
1347 if (r < 0)
1348 log_debug_errno(r, "Failed to parse DHCP static routes %s, ignoring: %m", static_routes);
1349 }
1350
1351 if (classless_routes) {
1352 r = deserialize_dhcp_routes(
1353 &lease->classless_routes,
1354 &lease->n_classless_routes,
1355 classless_routes);
1356 if (r < 0)
1357 log_debug_errno(r, "Failed to parse DHCP classless routes %s, ignoring: %m", classless_routes);
1358 }
1359
1360 if (lifetime) {
1361 r = safe_atou32(lifetime, &lease->lifetime);
1362 if (r < 0)
1363 log_debug_errno(r, "Failed to parse lifetime %s, ignoring: %m", lifetime);
1364 }
1365
1366 if (t1) {
1367 r = safe_atou32(t1, &lease->t1);
1368 if (r < 0)
1369 log_debug_errno(r, "Failed to parse T1 %s, ignoring: %m", t1);
1370 }
1371
1372 if (t2) {
1373 r = safe_atou32(t2, &lease->t2);
1374 if (r < 0)
1375 log_debug_errno(r, "Failed to parse T2 %s, ignoring: %m", t2);
1376 }
1377
1378 if (client_id_hex) {
1379 r = unhexmem(client_id_hex, SIZE_MAX, &lease->client_id, &lease->client_id_len);
1380 if (r < 0)
1381 log_debug_errno(r, "Failed to parse client ID %s, ignoring: %m", client_id_hex);
1382 }
1383
1384 if (vendor_specific_hex) {
1385 r = unhexmem(vendor_specific_hex, SIZE_MAX, &lease->vendor_specific, &lease->vendor_specific_len);
1386 if (r < 0)
1387 log_debug_errno(r, "Failed to parse vendor specific data %s, ignoring: %m", vendor_specific_hex);
1388 }
1389
1390 for (i = 0; i <= SD_DHCP_OPTION_PRIVATE_LAST - SD_DHCP_OPTION_PRIVATE_BASE; i++) {
1391 _cleanup_free_ void *data = NULL;
1392 size_t len;
1393
1394 if (!options[i])
1395 continue;
1396
1397 r = unhexmem(options[i], SIZE_MAX, &data, &len);
1398 if (r < 0) {
1399 log_debug_errno(r, "Failed to parse private DHCP option %s, ignoring: %m", options[i]);
1400 continue;
1401 }
1402
1403 r = dhcp_lease_insert_private_option(lease, SD_DHCP_OPTION_PRIVATE_BASE + i, data, len);
1404 if (r < 0)
1405 return r;
1406 }
1407
1408 *ret = TAKE_PTR(lease);
1409
1410 return 0;
1411 }
1412
1413 int dhcp_lease_set_default_subnet_mask(sd_dhcp_lease *lease) {
1414 struct in_addr address, mask;
1415 int r;
1416
1417 assert(lease);
1418
1419 if (lease->address == 0)
1420 return -ENODATA;
1421
1422 address.s_addr = lease->address;
1423
1424 /* fall back to the default subnet masks based on address class */
1425 r = in4_addr_default_subnet_mask(&address, &mask);
1426 if (r < 0)
1427 return r;
1428
1429 lease->subnet_mask = mask.s_addr;
1430 lease->have_subnet_mask = true;
1431
1432 return 0;
1433 }
1434
1435 int sd_dhcp_lease_get_client_id(sd_dhcp_lease *lease, const void **client_id, size_t *client_id_len) {
1436 assert_return(lease, -EINVAL);
1437 assert_return(client_id, -EINVAL);
1438 assert_return(client_id_len, -EINVAL);
1439
1440 if (!lease->client_id)
1441 return -ENODATA;
1442
1443 *client_id = lease->client_id;
1444 *client_id_len = lease->client_id_len;
1445
1446 return 0;
1447 }
1448
1449 int dhcp_lease_set_client_id(sd_dhcp_lease *lease, const void *client_id, size_t client_id_len) {
1450 assert_return(lease, -EINVAL);
1451 assert_return(client_id || client_id_len <= 0, -EINVAL);
1452
1453 if (client_id_len <= 0)
1454 lease->client_id = mfree(lease->client_id);
1455 else {
1456 void *p;
1457
1458 p = memdup(client_id, client_id_len);
1459 if (!p)
1460 return -ENOMEM;
1461
1462 free(lease->client_id);
1463 lease->client_id = p;
1464 lease->client_id_len = client_id_len;
1465 }
1466
1467 return 0;
1468 }
1469
1470 int sd_dhcp_lease_get_timezone(sd_dhcp_lease *lease, const char **tz) {
1471 assert_return(lease, -EINVAL);
1472 assert_return(tz, -EINVAL);
1473
1474 if (!lease->timezone)
1475 return -ENODATA;
1476
1477 *tz = lease->timezone;
1478 return 0;
1479 }
1480
1481 int sd_dhcp_route_get_destination(sd_dhcp_route *route, struct in_addr *destination) {
1482 assert_return(route, -EINVAL);
1483 assert_return(destination, -EINVAL);
1484
1485 *destination = route->dst_addr;
1486 return 0;
1487 }
1488
1489 int sd_dhcp_route_get_destination_prefix_length(sd_dhcp_route *route, uint8_t *length) {
1490 assert_return(route, -EINVAL);
1491 assert_return(length, -EINVAL);
1492
1493 *length = route->dst_prefixlen;
1494 return 0;
1495 }
1496
1497 int sd_dhcp_route_get_gateway(sd_dhcp_route *route, struct in_addr *gateway) {
1498 assert_return(route, -EINVAL);
1499 assert_return(gateway, -EINVAL);
1500
1501 *gateway = route->gw_addr;
1502 return 0;
1503 }
Unnamed repository; edit this file 'description' to name the repository.