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Merge pull request #22310 from yuwata/sd-dhcp-lease-fixes
[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 int sd_dhcp_lease_get_routes(sd_dhcp_lease *lease, sd_dhcp_route ***routes) {
219 sd_dhcp_route **ret;
220 unsigned i;
221
222 assert_return(lease, -EINVAL);
223 assert_return(routes, -EINVAL);
224
225 if (lease->static_route_size <= 0)
226 return -ENODATA;
227
228 ret = new(sd_dhcp_route *, lease->static_route_size);
229 if (!ret)
230 return -ENOMEM;
231
232 for (i = 0; i < lease->static_route_size; i++)
233 ret[i] = &lease->static_route[i];
234
235 *routes = ret;
236 return (int) lease->static_route_size;
237 }
238
239 int sd_dhcp_lease_get_search_domains(sd_dhcp_lease *lease, char ***domains) {
240 size_t r;
241
242 assert_return(lease, -EINVAL);
243 assert_return(domains, -EINVAL);
244
245 r = strv_length(lease->search_domains);
246 if (r > 0) {
247 *domains = lease->search_domains;
248 return (int) r;
249 }
250
251 return -ENODATA;
252 }
253
254 int sd_dhcp_lease_get_6rd(
255 sd_dhcp_lease *lease,
256 uint8_t *ret_ipv4masklen,
257 uint8_t *ret_prefixlen,
258 struct in6_addr *ret_prefix,
259 const struct in_addr **ret_br_addresses,
260 size_t *ret_n_br_addresses) {
261
262 assert_return(lease, -EINVAL);
263
264 if (lease->sixrd_n_br_addresses <= 0)
265 return -ENODATA;
266
267 if (ret_ipv4masklen)
268 *ret_ipv4masklen = lease->sixrd_ipv4masklen;
269 if (ret_prefixlen)
270 *ret_prefixlen = lease->sixrd_prefixlen;
271 if (ret_prefix)
272 *ret_prefix = lease->sixrd_prefix;
273 if (ret_br_addresses)
274 *ret_br_addresses = lease->sixrd_br_addresses;
275 if (ret_n_br_addresses)
276 *ret_n_br_addresses = lease->sixrd_n_br_addresses;
277
278 return 0;
279 }
280
281 int sd_dhcp_lease_get_vendor_specific(sd_dhcp_lease *lease, const void **data, size_t *data_len) {
282 assert_return(lease, -EINVAL);
283 assert_return(data, -EINVAL);
284 assert_return(data_len, -EINVAL);
285
286 if (lease->vendor_specific_len <= 0)
287 return -ENODATA;
288
289 *data = lease->vendor_specific;
290 *data_len = lease->vendor_specific_len;
291 return 0;
292 }
293
294 static sd_dhcp_lease *dhcp_lease_free(sd_dhcp_lease *lease) {
295 assert(lease);
296
297 while (lease->private_options) {
298 struct sd_dhcp_raw_option *option = lease->private_options;
299
300 LIST_REMOVE(options, lease->private_options, option);
301
302 free(option->data);
303 free(option);
304 }
305
306 free(lease->root_path);
307 free(lease->router);
308 free(lease->timezone);
309 free(lease->hostname);
310 free(lease->domainname);
311
312 for (sd_dhcp_lease_server_type_t i = 0; i < _SD_DHCP_LEASE_SERVER_TYPE_MAX; i++)
313 free(lease->servers[i].addr);
314
315 free(lease->static_route);
316 free(lease->client_id);
317 free(lease->vendor_specific);
318 strv_free(lease->search_domains);
319 free(lease->sixrd_br_addresses);
320 return mfree(lease);
321 }
322
323 DEFINE_TRIVIAL_REF_UNREF_FUNC(sd_dhcp_lease, sd_dhcp_lease, dhcp_lease_free);
324
325 static int lease_parse_u32(const uint8_t *option, size_t len, uint32_t *ret, uint32_t min) {
326 assert(option);
327 assert(ret);
328
329 if (len != 4)
330 return -EINVAL;
331
332 *ret = unaligned_read_be32((be32_t*) option);
333 if (*ret < min)
334 *ret = min;
335
336 return 0;
337 }
338
339 static int lease_parse_u16(const uint8_t *option, size_t len, uint16_t *ret, uint16_t min) {
340 assert(option);
341 assert(ret);
342
343 if (len != 2)
344 return -EINVAL;
345
346 *ret = unaligned_read_be16((be16_t*) option);
347 if (*ret < min)
348 *ret = min;
349
350 return 0;
351 }
352
353 static int lease_parse_be32(const uint8_t *option, size_t len, be32_t *ret) {
354 assert(option);
355 assert(ret);
356
357 if (len != 4)
358 return -EINVAL;
359
360 memcpy(ret, option, 4);
361 return 0;
362 }
363
364 static int lease_parse_string(const uint8_t *option, size_t len, char **ret) {
365 assert(option);
366 assert(ret);
367
368 if (len <= 0)
369 *ret = mfree(*ret);
370 else {
371 char *string;
372
373 /*
374 * One trailing NUL byte is OK, we don't mind. See:
375 * https://github.com/systemd/systemd/issues/1337
376 */
377 if (memchr(option, 0, len - 1))
378 return -EINVAL;
379
380 string = memdup_suffix0((const char *) option, len);
381 if (!string)
382 return -ENOMEM;
383
384 free_and_replace(*ret, string);
385 }
386
387 return 0;
388 }
389
390 static int lease_parse_domain(const uint8_t *option, size_t len, char **ret) {
391 _cleanup_free_ char *name = NULL, *normalized = NULL;
392 int r;
393
394 assert(option);
395 assert(ret);
396
397 r = lease_parse_string(option, len, &name);
398 if (r < 0)
399 return r;
400 if (!name) {
401 *ret = mfree(*ret);
402 return 0;
403 }
404
405 r = dns_name_normalize(name, 0, &normalized);
406 if (r < 0)
407 return r;
408
409 if (is_localhost(normalized))
410 return -EINVAL;
411
412 if (dns_name_is_root(normalized))
413 return -EINVAL;
414
415 free_and_replace(*ret, normalized);
416
417 return 0;
418 }
419
420 static int lease_parse_in_addrs(const uint8_t *option, size_t len, struct in_addr **ret, size_t *n_ret) {
421 assert(option || len == 0);
422 assert(ret);
423 assert(n_ret);
424
425 if (len <= 0) {
426 *ret = mfree(*ret);
427 *n_ret = 0;
428 } else {
429 size_t n_addresses;
430 struct in_addr *addresses;
431
432 if (len % 4 != 0)
433 return -EINVAL;
434
435 n_addresses = len / 4;
436
437 addresses = newdup(struct in_addr, option, n_addresses);
438 if (!addresses)
439 return -ENOMEM;
440
441 free(*ret);
442 *ret = addresses;
443 *n_ret = n_addresses;
444 }
445
446 return 0;
447 }
448
449 static int lease_parse_sip_server(const uint8_t *option, size_t len, struct in_addr **ret, size_t *n_ret) {
450 assert(option || len == 0);
451 assert(ret);
452 assert(n_ret);
453
454 if (len <= 0)
455 return -EINVAL;
456
457 /* The SIP record is like the other, regular server records, but prefixed with a single "encoding"
458 * byte that is either 0 or 1. We only support it to be 1 for now. Let's drop it and parse it like
459 * the other fields */
460
461 if (option[0] != 1) { /* We only support IP address encoding for now */
462 *ret = mfree(*ret);
463 *n_ret = 0;
464 return 0;
465 }
466
467 return lease_parse_in_addrs(option + 1, len - 1, ret, n_ret);
468 }
469
470 static int lease_parse_routes(
471 const uint8_t *option,
472 size_t len,
473 struct sd_dhcp_route **routes,
474 size_t *routes_size) {
475
476 int r;
477
478 assert(option || len <= 0);
479 assert(routes);
480 assert(routes_size);
481
482 if (len % 8 != 0)
483 return -EINVAL;
484
485 while (len >= 8) {
486 struct in_addr dst, gw;
487 uint8_t prefixlen;
488
489 assert_se(lease_parse_be32(option, 4, &dst.s_addr) >= 0);
490 option += 4;
491
492 assert_se(lease_parse_be32(option, 4, &gw.s_addr) >= 0);
493 option += 4;
494
495 len -= 8;
496
497 r = in4_addr_default_prefixlen(&dst, &prefixlen);
498 if (r < 0)
499 return -EINVAL;
500
501 (void) in4_addr_mask(&dst, prefixlen);
502
503 if (!GREEDY_REALLOC(*routes, *routes_size + 1))
504 return -ENOMEM;
505
506 (*routes)[*routes_size] = (struct sd_dhcp_route) {
507 .dst_addr = dst,
508 .gw_addr = gw,
509 .dst_prefixlen = prefixlen,
510 .option = SD_DHCP_OPTION_STATIC_ROUTE,
511 };
512
513 (*routes_size)++;
514 }
515
516 return 0;
517 }
518
519 /* parses RFC3442 Classless Static Route Option */
520 static int lease_parse_classless_routes(
521 const uint8_t *option, size_t len,
522 struct sd_dhcp_route **routes, size_t *routes_size) {
523
524 assert(option || len <= 0);
525 assert(routes);
526 assert(routes_size);
527
528 if (len <= 0)
529 return 0;
530
531 /* option format: (subnet-mask-width significant-subnet-octets gateway-ip)* */
532
533 while (len > 0) {
534 uint8_t dst_octets;
535 struct sd_dhcp_route *route;
536
537 if (!GREEDY_REALLOC(*routes, *routes_size + 1))
538 return -ENOMEM;
539
540 route = *routes + *routes_size;
541 route->option = SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE;
542
543 dst_octets = (*option == 0 ? 0 : ((*option - 1) / 8) + 1);
544 route->dst_prefixlen = *option;
545 option++;
546 len--;
547
548 /* can't have more than 4 octets in IPv4 */
549 if (dst_octets > 4 || len < dst_octets)
550 return -EINVAL;
551
552 route->dst_addr.s_addr = 0;
553 memcpy(&route->dst_addr.s_addr, option, dst_octets);
554 option += dst_octets;
555 len -= dst_octets;
556
557 if (len < 4)
558 return -EINVAL;
559
560 assert_se(lease_parse_be32(option, 4, &route->gw_addr.s_addr) >= 0);
561 option += 4;
562 len -= 4;
563
564 (*routes_size)++;
565 }
566
567 return 0;
568 }
569
570 static int lease_parse_6rd(sd_dhcp_lease *lease, const uint8_t *option, size_t len) {
571 uint8_t ipv4masklen, prefixlen;
572 struct in6_addr prefix;
573 _cleanup_free_ struct in_addr *br_addresses = NULL;
574 size_t n_br_addresses;
575
576 assert(lease);
577 assert(option);
578
579 /* See RFC 5969 Section 7.1.1 */
580
581 if (lease->sixrd_n_br_addresses > 0)
582 /* Multiple 6rd option?? */
583 return -EINVAL;
584
585 /* option-length: The length of the DHCP option in octets (22 octets with one BR IPv4 address). */
586 if (len < 2 + sizeof(struct in6_addr) + sizeof(struct in_addr) ||
587 (len - 2 - sizeof(struct in6_addr)) % sizeof(struct in_addr) != 0)
588 return -EINVAL;
589
590 /* IPv4MaskLen: The number of high-order bits that are identical across all CE IPv4 addresses
591 * within a given 6rd domain. This may be any value between 0 and 32. Any value
592 * greater than 32 is invalid. */
593 ipv4masklen = option[0];
594 if (ipv4masklen > 32)
595 return -EINVAL;
596
597 /* 6rdPrefixLen: The IPv6 prefix length of the SP's 6rd IPv6 prefix in number of bits. For the
598 * purpose of bounds checking by DHCP option processing, the sum of
599 * (32 - IPv4MaskLen) + 6rdPrefixLen MUST be less than or equal to 128. */
600 prefixlen = option[1];
601 if (32 - ipv4masklen + prefixlen > 128)
602 return -EINVAL;
603
604 /* 6rdPrefix: The service provider's 6rd IPv6 prefix represented as a 16-octet IPv6 address.
605 * The bits in the prefix after the 6rdPrefixlen number of bits are reserved and
606 * MUST be initialized to zero by the sender and ignored by the receiver. */
607 memcpy(&prefix, option + 2, sizeof(struct in6_addr));
608 (void) in6_addr_mask(&prefix, prefixlen);
609
610 /* 6rdBRIPv4Address: One or more IPv4 addresses of the 6rd Border Relay(s) for a given 6rd domain. */
611 n_br_addresses = (len - 2 - sizeof(struct in6_addr)) / sizeof(struct in_addr);
612 br_addresses = newdup(struct in_addr, option + 2 + sizeof(struct in6_addr), n_br_addresses);
613 if (!br_addresses)
614 return -ENOMEM;
615
616 lease->sixrd_ipv4masklen = ipv4masklen;
617 lease->sixrd_prefixlen = prefixlen;
618 lease->sixrd_prefix = prefix;
619 lease->sixrd_br_addresses = TAKE_PTR(br_addresses);
620 lease->sixrd_n_br_addresses = n_br_addresses;
621
622 return 0;
623 }
624
625 int dhcp_lease_parse_options(uint8_t code, uint8_t len, const void *option, void *userdata) {
626 sd_dhcp_lease *lease = userdata;
627 int r;
628
629 assert(lease);
630
631 switch(code) {
632
633 case SD_DHCP_OPTION_IP_ADDRESS_LEASE_TIME:
634 r = lease_parse_u32(option, len, &lease->lifetime, 1);
635 if (r < 0)
636 log_debug_errno(r, "Failed to parse lease time, ignoring: %m");
637
638 break;
639
640 case SD_DHCP_OPTION_SERVER_IDENTIFIER:
641 r = lease_parse_be32(option, len, &lease->server_address);
642 if (r < 0)
643 log_debug_errno(r, "Failed to parse server identifier, ignoring: %m");
644
645 break;
646
647 case SD_DHCP_OPTION_SUBNET_MASK:
648 r = lease_parse_be32(option, len, &lease->subnet_mask);
649 if (r < 0)
650 log_debug_errno(r, "Failed to parse subnet mask, ignoring: %m");
651 else
652 lease->have_subnet_mask = true;
653 break;
654
655 case SD_DHCP_OPTION_BROADCAST:
656 r = lease_parse_be32(option, len, &lease->broadcast);
657 if (r < 0)
658 log_debug_errno(r, "Failed to parse broadcast address, ignoring: %m");
659 else
660 lease->have_broadcast = true;
661 break;
662
663 case SD_DHCP_OPTION_ROUTER:
664 r = lease_parse_in_addrs(option, len, &lease->router, &lease->router_size);
665 if (r < 0)
666 log_debug_errno(r, "Failed to parse router addresses, ignoring: %m");
667 break;
668
669 case SD_DHCP_OPTION_DOMAIN_NAME_SERVER:
670 r = lease_parse_in_addrs(option, len, &lease->servers[SD_DHCP_LEASE_DNS].addr, &lease->servers[SD_DHCP_LEASE_DNS].size);
671 if (r < 0)
672 log_debug_errno(r, "Failed to parse DNS server, ignoring: %m");
673 break;
674
675 case SD_DHCP_OPTION_NTP_SERVER:
676 r = lease_parse_in_addrs(option, len, &lease->servers[SD_DHCP_LEASE_NTP].addr, &lease->servers[SD_DHCP_LEASE_NTP].size);
677 if (r < 0)
678 log_debug_errno(r, "Failed to parse NTP server, ignoring: %m");
679 break;
680
681 case SD_DHCP_OPTION_SIP_SERVER:
682 r = lease_parse_sip_server(option, len, &lease->servers[SD_DHCP_LEASE_SIP].addr, &lease->servers[SD_DHCP_LEASE_SIP].size);
683 if (r < 0)
684 log_debug_errno(r, "Failed to parse SIP server, ignoring: %m");
685 break;
686
687 case SD_DHCP_OPTION_POP3_SERVER:
688 r = lease_parse_in_addrs(option, len, &lease->servers[SD_DHCP_LEASE_POP3].addr, &lease->servers[SD_DHCP_LEASE_POP3].size);
689 if (r < 0)
690 log_debug_errno(r, "Failed to parse POP3 server, ignoring: %m");
691 break;
692
693 case SD_DHCP_OPTION_SMTP_SERVER:
694 r = lease_parse_in_addrs(option, len, &lease->servers[SD_DHCP_LEASE_SMTP].addr, &lease->servers[SD_DHCP_LEASE_SMTP].size);
695 if (r < 0)
696 log_debug_errno(r, "Failed to parse SMTP server, ignoring: %m");
697 break;
698
699 case SD_DHCP_OPTION_LPR_SERVER:
700 r = lease_parse_in_addrs(option, len, &lease->servers[SD_DHCP_LEASE_LPR].addr, &lease->servers[SD_DHCP_LEASE_LPR].size);
701 if (r < 0)
702 log_debug_errno(r, "Failed to parse LPR server, ignoring: %m");
703 break;
704
705 case SD_DHCP_OPTION_STATIC_ROUTE:
706 r = lease_parse_routes(option, len, &lease->static_route, &lease->static_route_size);
707 if (r < 0)
708 log_debug_errno(r, "Failed to parse static routes, ignoring: %m");
709 break;
710
711 case SD_DHCP_OPTION_INTERFACE_MTU:
712 r = lease_parse_u16(option, len, &lease->mtu, 68);
713 if (r < 0)
714 log_debug_errno(r, "Failed to parse MTU, ignoring: %m");
715 if (lease->mtu < DHCP_DEFAULT_MIN_SIZE) {
716 log_debug("MTU value of %" PRIu16 " too small. Using default MTU value of %d instead.", lease->mtu, DHCP_DEFAULT_MIN_SIZE);
717 lease->mtu = DHCP_DEFAULT_MIN_SIZE;
718 }
719
720 break;
721
722 case SD_DHCP_OPTION_DOMAIN_NAME:
723 r = lease_parse_domain(option, len, &lease->domainname);
724 if (r < 0) {
725 log_debug_errno(r, "Failed to parse domain name, ignoring: %m");
726 return 0;
727 }
728
729 break;
730
731 case SD_DHCP_OPTION_DOMAIN_SEARCH_LIST:
732 r = dhcp_lease_parse_search_domains(option, len, &lease->search_domains);
733 if (r < 0)
734 log_debug_errno(r, "Failed to parse Domain Search List, ignoring: %m");
735 break;
736
737 case SD_DHCP_OPTION_HOST_NAME:
738 r = lease_parse_domain(option, len, &lease->hostname);
739 if (r < 0) {
740 log_debug_errno(r, "Failed to parse hostname, ignoring: %m");
741 return 0;
742 }
743
744 break;
745
746 case SD_DHCP_OPTION_ROOT_PATH:
747 r = lease_parse_string(option, len, &lease->root_path);
748 if (r < 0)
749 log_debug_errno(r, "Failed to parse root path, ignoring: %m");
750 break;
751
752 case SD_DHCP_OPTION_RENEWAL_T1_TIME:
753 r = lease_parse_u32(option, len, &lease->t1, 1);
754 if (r < 0)
755 log_debug_errno(r, "Failed to parse T1 time, ignoring: %m");
756 break;
757
758 case SD_DHCP_OPTION_REBINDING_T2_TIME:
759 r = lease_parse_u32(option, len, &lease->t2, 1);
760 if (r < 0)
761 log_debug_errno(r, "Failed to parse T2 time, ignoring: %m");
762 break;
763
764 case SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE:
765 r = lease_parse_classless_routes(
766 option, len,
767 &lease->static_route,
768 &lease->static_route_size);
769 if (r < 0)
770 log_debug_errno(r, "Failed to parse classless routes, ignoring: %m");
771 break;
772
773 case SD_DHCP_OPTION_NEW_TZDB_TIMEZONE: {
774 _cleanup_free_ char *tz = NULL;
775
776 r = lease_parse_string(option, len, &tz);
777 if (r < 0) {
778 log_debug_errno(r, "Failed to parse timezone option, ignoring: %m");
779 return 0;
780 }
781
782 if (!timezone_is_valid(tz, LOG_DEBUG)) {
783 log_debug("Timezone is not valid, ignoring.");
784 return 0;
785 }
786
787 free_and_replace(lease->timezone, tz);
788
789 break;
790 }
791
792 case SD_DHCP_OPTION_VENDOR_SPECIFIC:
793
794 if (len <= 0)
795 lease->vendor_specific = mfree(lease->vendor_specific);
796 else {
797 void *p;
798
799 p = memdup(option, len);
800 if (!p)
801 return -ENOMEM;
802
803 free(lease->vendor_specific);
804 lease->vendor_specific = p;
805 }
806
807 lease->vendor_specific_len = len;
808 break;
809
810 case SD_DHCP_OPTION_6RD:
811 r = lease_parse_6rd(lease, option, len);
812 if (r < 0)
813 log_debug_errno(r, "Failed to parse 6rd option, ignoring: %m");
814 break;
815
816 case SD_DHCP_OPTION_PRIVATE_BASE ... SD_DHCP_OPTION_PRIVATE_LAST:
817 r = dhcp_lease_insert_private_option(lease, code, option, len);
818 if (r < 0)
819 return r;
820
821 break;
822
823 default:
824 log_debug("Ignoring option DHCP option %"PRIu8" while parsing.", code);
825 break;
826 }
827
828 return 0;
829 }
830
831 /* Parses compressed domain names. */
832 int dhcp_lease_parse_search_domains(const uint8_t *option, size_t len, char ***domains) {
833 _cleanup_strv_free_ char **names = NULL;
834 size_t pos = 0, cnt = 0;
835 int r;
836
837 assert(domains);
838 assert_return(option && len > 0, -ENODATA);
839
840 while (pos < len) {
841 _cleanup_free_ char *name = NULL;
842 size_t n = 0;
843 size_t jump_barrier = pos, next_chunk = 0;
844 bool first = true;
845
846 for (;;) {
847 uint8_t c;
848 c = option[pos++];
849
850 if (c == 0) {
851 /* End of name */
852 break;
853 } else if (c <= 63) {
854 const char *label;
855
856 /* Literal label */
857 label = (const char*) (option + pos);
858 pos += c;
859 if (pos >= len)
860 return -EBADMSG;
861
862 if (!GREEDY_REALLOC(name, n + !first + DNS_LABEL_ESCAPED_MAX))
863 return -ENOMEM;
864
865 if (first)
866 first = false;
867 else
868 name[n++] = '.';
869
870 r = dns_label_escape(label, c, name + n, DNS_LABEL_ESCAPED_MAX);
871 if (r < 0)
872 return r;
873
874 n += r;
875 } else if (FLAGS_SET(c, 0xc0)) {
876 /* Pointer */
877
878 uint8_t d;
879 uint16_t ptr;
880
881 if (pos >= len)
882 return -EBADMSG;
883
884 d = option[pos++];
885 ptr = (uint16_t) (c & ~0xc0) << 8 | (uint16_t) d;
886
887 /* Jumps are limited to a "prior occurrence" (RFC-1035 4.1.4) */
888 if (ptr >= jump_barrier)
889 return -EBADMSG;
890 jump_barrier = ptr;
891
892 /* Save current location so we don't end up re-parsing what's parsed so far. */
893 if (next_chunk == 0)
894 next_chunk = pos;
895
896 pos = ptr;
897 } else
898 return -EBADMSG;
899 }
900
901 if (!GREEDY_REALLOC(name, n + 1))
902 return -ENOMEM;
903 name[n] = 0;
904
905 r = strv_extend(&names, name);
906 if (r < 0)
907 return r;
908
909 cnt++;
910
911 if (next_chunk != 0)
912 pos = next_chunk;
913 }
914
915 strv_free_and_replace(*domains, names);
916
917 return cnt;
918 }
919
920 int dhcp_lease_insert_private_option(sd_dhcp_lease *lease, uint8_t tag, const void *data, uint8_t len) {
921 struct sd_dhcp_raw_option *cur, *option;
922
923 assert(lease);
924
925 LIST_FOREACH(options, cur, lease->private_options) {
926 if (tag < cur->tag)
927 break;
928 if (tag == cur->tag) {
929 log_debug("Ignoring duplicate option, tagged %i.", tag);
930 return 0;
931 }
932 }
933
934 option = new(struct sd_dhcp_raw_option, 1);
935 if (!option)
936 return -ENOMEM;
937
938 option->tag = tag;
939 option->length = len;
940 option->data = memdup(data, len);
941 if (!option->data) {
942 free(option);
943 return -ENOMEM;
944 }
945
946 LIST_INSERT_BEFORE(options, lease->private_options, cur, option);
947 return 0;
948 }
949
950 int dhcp_lease_new(sd_dhcp_lease **ret) {
951 sd_dhcp_lease *lease;
952
953 lease = new0(sd_dhcp_lease, 1);
954 if (!lease)
955 return -ENOMEM;
956
957 lease->n_ref = 1;
958
959 *ret = lease;
960 return 0;
961 }
962
963 int dhcp_lease_save(sd_dhcp_lease *lease, const char *lease_file) {
964 _cleanup_(unlink_and_freep) char *temp_path = NULL;
965 _cleanup_fclose_ FILE *f = NULL;
966 struct sd_dhcp_raw_option *option;
967 struct in_addr address;
968 const struct in_addr *addresses;
969 const void *client_id, *data;
970 size_t client_id_len, data_len;
971 char sbuf[INET_ADDRSTRLEN];
972 const char *string;
973 uint16_t mtu;
974 _cleanup_free_ sd_dhcp_route **routes = NULL;
975 char **search_domains = NULL;
976 uint32_t t1, t2, lifetime;
977 int r;
978
979 assert(lease);
980 assert(lease_file);
981
982 r = fopen_temporary(lease_file, &f, &temp_path);
983 if (r < 0)
984 return r;
985
986 (void) fchmod(fileno(f), 0644);
987
988 fprintf(f,
989 "# This is private data. Do not parse.\n");
990
991 r = sd_dhcp_lease_get_address(lease, &address);
992 if (r >= 0)
993 fprintf(f, "ADDRESS=%s\n", inet_ntop(AF_INET, &address, sbuf, sizeof(sbuf)));
994
995 r = sd_dhcp_lease_get_netmask(lease, &address);
996 if (r >= 0)
997 fprintf(f, "NETMASK=%s\n", inet_ntop(AF_INET, &address, sbuf, sizeof(sbuf)));
998
999 r = sd_dhcp_lease_get_router(lease, &addresses);
1000 if (r > 0) {
1001 fputs("ROUTER=", f);
1002 serialize_in_addrs(f, addresses, r, false, NULL);
1003 fputc('\n', f);
1004 }
1005
1006 r = sd_dhcp_lease_get_server_identifier(lease, &address);
1007 if (r >= 0)
1008 fprintf(f, "SERVER_ADDRESS=%s\n", inet_ntop(AF_INET, &address, sbuf, sizeof(sbuf)));
1009
1010 r = sd_dhcp_lease_get_next_server(lease, &address);
1011 if (r >= 0)
1012 fprintf(f, "NEXT_SERVER=%s\n", inet_ntop(AF_INET, &address, sbuf, sizeof(sbuf)));
1013
1014 r = sd_dhcp_lease_get_broadcast(lease, &address);
1015 if (r >= 0)
1016 fprintf(f, "BROADCAST=%s\n", inet_ntop(AF_INET, &address, sbuf, sizeof(sbuf)));
1017
1018 r = sd_dhcp_lease_get_mtu(lease, &mtu);
1019 if (r >= 0)
1020 fprintf(f, "MTU=%" PRIu16 "\n", mtu);
1021
1022 r = sd_dhcp_lease_get_t1(lease, &t1);
1023 if (r >= 0)
1024 fprintf(f, "T1=%" PRIu32 "\n", t1);
1025
1026 r = sd_dhcp_lease_get_t2(lease, &t2);
1027 if (r >= 0)
1028 fprintf(f, "T2=%" PRIu32 "\n", t2);
1029
1030 r = sd_dhcp_lease_get_lifetime(lease, &lifetime);
1031 if (r >= 0)
1032 fprintf(f, "LIFETIME=%" PRIu32 "\n", lifetime);
1033
1034 r = sd_dhcp_lease_get_dns(lease, &addresses);
1035 if (r > 0) {
1036 fputs("DNS=", f);
1037 serialize_in_addrs(f, addresses, r, false, NULL);
1038 fputc('\n', f);
1039 }
1040
1041 r = sd_dhcp_lease_get_ntp(lease, &addresses);
1042 if (r > 0) {
1043 fputs("NTP=", f);
1044 serialize_in_addrs(f, addresses, r, false, NULL);
1045 fputc('\n', f);
1046 }
1047
1048 r = sd_dhcp_lease_get_sip(lease, &addresses);
1049 if (r > 0) {
1050 fputs("SIP=", f);
1051 serialize_in_addrs(f, addresses, r, false, NULL);
1052 fputc('\n', f);
1053 }
1054
1055 r = sd_dhcp_lease_get_domainname(lease, &string);
1056 if (r >= 0)
1057 fprintf(f, "DOMAINNAME=%s\n", string);
1058
1059 r = sd_dhcp_lease_get_search_domains(lease, &search_domains);
1060 if (r > 0) {
1061 fputs("DOMAIN_SEARCH_LIST=", f);
1062 fputstrv(f, search_domains, NULL, NULL);
1063 fputc('\n', f);
1064 }
1065
1066 r = sd_dhcp_lease_get_hostname(lease, &string);
1067 if (r >= 0)
1068 fprintf(f, "HOSTNAME=%s\n", string);
1069
1070 r = sd_dhcp_lease_get_root_path(lease, &string);
1071 if (r >= 0)
1072 fprintf(f, "ROOT_PATH=%s\n", string);
1073
1074 r = sd_dhcp_lease_get_routes(lease, &routes);
1075 if (r > 0)
1076 serialize_dhcp_routes(f, "ROUTES", routes, r);
1077
1078 r = sd_dhcp_lease_get_timezone(lease, &string);
1079 if (r >= 0)
1080 fprintf(f, "TIMEZONE=%s\n", string);
1081
1082 r = sd_dhcp_lease_get_client_id(lease, &client_id, &client_id_len);
1083 if (r >= 0) {
1084 _cleanup_free_ char *client_id_hex = NULL;
1085
1086 client_id_hex = hexmem(client_id, client_id_len);
1087 if (!client_id_hex)
1088 return -ENOMEM;
1089 fprintf(f, "CLIENTID=%s\n", client_id_hex);
1090 }
1091
1092 r = sd_dhcp_lease_get_vendor_specific(lease, &data, &data_len);
1093 if (r >= 0) {
1094 _cleanup_free_ char *option_hex = NULL;
1095
1096 option_hex = hexmem(data, data_len);
1097 if (!option_hex)
1098 return -ENOMEM;
1099 fprintf(f, "VENDOR_SPECIFIC=%s\n", option_hex);
1100 }
1101
1102 LIST_FOREACH(options, option, lease->private_options) {
1103 char key[STRLEN("OPTION_000")+1];
1104
1105 xsprintf(key, "OPTION_%" PRIu8, option->tag);
1106 r = serialize_dhcp_option(f, key, option->data, option->length);
1107 if (r < 0)
1108 return r;
1109 }
1110
1111 r = fflush_and_check(f);
1112 if (r < 0)
1113 return r;
1114
1115 r = conservative_rename(temp_path, lease_file);
1116 if (r < 0)
1117 return r;
1118
1119 temp_path = mfree(temp_path);
1120
1121 return 0;
1122 }
1123
1124 static char **private_options_free(char **options) {
1125 if (!options)
1126 return NULL;
1127
1128 for (unsigned i = 0; i < SD_DHCP_OPTION_PRIVATE_LAST - SD_DHCP_OPTION_PRIVATE_BASE + 1; i++)
1129 free(options[i]);
1130
1131 return mfree(options);
1132 }
1133
1134 DEFINE_TRIVIAL_CLEANUP_FUNC(char**, private_options_free);
1135
1136 int dhcp_lease_load(sd_dhcp_lease **ret, const char *lease_file) {
1137 _cleanup_(sd_dhcp_lease_unrefp) sd_dhcp_lease *lease = NULL;
1138 _cleanup_free_ char
1139 *address = NULL,
1140 *router = NULL,
1141 *netmask = NULL,
1142 *server_address = NULL,
1143 *next_server = NULL,
1144 *broadcast = NULL,
1145 *dns = NULL,
1146 *ntp = NULL,
1147 *sip = NULL,
1148 *pop3 = NULL,
1149 *smtp = NULL,
1150 *lpr = NULL,
1151 *mtu = NULL,
1152 *routes = NULL,
1153 *domains = NULL,
1154 *client_id_hex = NULL,
1155 *vendor_specific_hex = NULL,
1156 *lifetime = NULL,
1157 *t1 = NULL,
1158 *t2 = NULL;
1159 _cleanup_(private_options_freep) char **options = NULL;
1160
1161 int r, i;
1162
1163 assert(lease_file);
1164 assert(ret);
1165
1166 r = dhcp_lease_new(&lease);
1167 if (r < 0)
1168 return r;
1169
1170 options = new0(char*, SD_DHCP_OPTION_PRIVATE_LAST - SD_DHCP_OPTION_PRIVATE_BASE + 1);
1171 if (!options)
1172 return -ENOMEM;
1173
1174 r = parse_env_file(NULL, lease_file,
1175 "ADDRESS", &address,
1176 "ROUTER", &router,
1177 "NETMASK", &netmask,
1178 "SERVER_ADDRESS", &server_address,
1179 "NEXT_SERVER", &next_server,
1180 "BROADCAST", &broadcast,
1181 "DNS", &dns,
1182 "NTP", &ntp,
1183 "SIP", &sip,
1184 "POP3", &pop3,
1185 "SMTP", &smtp,
1186 "LPR", &lpr,
1187 "MTU", &mtu,
1188 "DOMAINNAME", &lease->domainname,
1189 "HOSTNAME", &lease->hostname,
1190 "DOMAIN_SEARCH_LIST", &domains,
1191 "ROOT_PATH", &lease->root_path,
1192 "ROUTES", &routes,
1193 "CLIENTID", &client_id_hex,
1194 "TIMEZONE", &lease->timezone,
1195 "VENDOR_SPECIFIC", &vendor_specific_hex,
1196 "LIFETIME", &lifetime,
1197 "T1", &t1,
1198 "T2", &t2,
1199 "OPTION_224", &options[0],
1200 "OPTION_225", &options[1],
1201 "OPTION_226", &options[2],
1202 "OPTION_227", &options[3],
1203 "OPTION_228", &options[4],
1204 "OPTION_229", &options[5],
1205 "OPTION_230", &options[6],
1206 "OPTION_231", &options[7],
1207 "OPTION_232", &options[8],
1208 "OPTION_233", &options[9],
1209 "OPTION_234", &options[10],
1210 "OPTION_235", &options[11],
1211 "OPTION_236", &options[12],
1212 "OPTION_237", &options[13],
1213 "OPTION_238", &options[14],
1214 "OPTION_239", &options[15],
1215 "OPTION_240", &options[16],
1216 "OPTION_241", &options[17],
1217 "OPTION_242", &options[18],
1218 "OPTION_243", &options[19],
1219 "OPTION_244", &options[20],
1220 "OPTION_245", &options[21],
1221 "OPTION_246", &options[22],
1222 "OPTION_247", &options[23],
1223 "OPTION_248", &options[24],
1224 "OPTION_249", &options[25],
1225 "OPTION_250", &options[26],
1226 "OPTION_251", &options[27],
1227 "OPTION_252", &options[28],
1228 "OPTION_253", &options[29],
1229 "OPTION_254", &options[30]);
1230 if (r < 0)
1231 return r;
1232
1233 if (address) {
1234 r = inet_pton(AF_INET, address, &lease->address);
1235 if (r <= 0)
1236 log_debug("Failed to parse address %s, ignoring.", address);
1237 }
1238
1239 if (router) {
1240 r = deserialize_in_addrs(&lease->router, router);
1241 if (r < 0)
1242 log_debug_errno(r, "Failed to deserialize router addresses %s, ignoring: %m", router);
1243 else
1244 lease->router_size = r;
1245 }
1246
1247 if (netmask) {
1248 r = inet_pton(AF_INET, netmask, &lease->subnet_mask);
1249 if (r <= 0)
1250 log_debug("Failed to parse netmask %s, ignoring.", netmask);
1251 else
1252 lease->have_subnet_mask = true;
1253 }
1254
1255 if (server_address) {
1256 r = inet_pton(AF_INET, server_address, &lease->server_address);
1257 if (r <= 0)
1258 log_debug("Failed to parse server address %s, ignoring.", server_address);
1259 }
1260
1261 if (next_server) {
1262 r = inet_pton(AF_INET, next_server, &lease->next_server);
1263 if (r <= 0)
1264 log_debug("Failed to parse next server %s, ignoring.", next_server);
1265 }
1266
1267 if (broadcast) {
1268 r = inet_pton(AF_INET, broadcast, &lease->broadcast);
1269 if (r <= 0)
1270 log_debug("Failed to parse broadcast address %s, ignoring.", broadcast);
1271 else
1272 lease->have_broadcast = true;
1273 }
1274
1275 if (dns) {
1276 r = deserialize_in_addrs(&lease->servers[SD_DHCP_LEASE_DNS].addr, dns);
1277 if (r < 0)
1278 log_debug_errno(r, "Failed to deserialize DNS servers %s, ignoring: %m", dns);
1279 else
1280 lease->servers[SD_DHCP_LEASE_DNS].size = r;
1281 }
1282
1283 if (ntp) {
1284 r = deserialize_in_addrs(&lease->servers[SD_DHCP_LEASE_NTP].addr, ntp);
1285 if (r < 0)
1286 log_debug_errno(r, "Failed to deserialize NTP servers %s, ignoring: %m", ntp);
1287 else
1288 lease->servers[SD_DHCP_LEASE_NTP].size = r;
1289 }
1290
1291 if (sip) {
1292 r = deserialize_in_addrs(&lease->servers[SD_DHCP_LEASE_SIP].addr, sip);
1293 if (r < 0)
1294 log_debug_errno(r, "Failed to deserialize SIP servers %s, ignoring: %m", sip);
1295 else
1296 lease->servers[SD_DHCP_LEASE_SIP].size = r;
1297 }
1298
1299 if (pop3) {
1300 r = deserialize_in_addrs(&lease->servers[SD_DHCP_LEASE_POP3].addr, pop3);
1301 if (r < 0)
1302 log_debug_errno(r, "Failed to deserialize POP3 server %s, ignoring: %m", pop3);
1303 else
1304 lease->servers[SD_DHCP_LEASE_POP3].size = r;
1305 }
1306
1307 if (smtp) {
1308 r = deserialize_in_addrs(&lease->servers[SD_DHCP_LEASE_SMTP].addr, smtp);
1309 if (r < 0)
1310 log_debug_errno(r, "Failed to deserialize SMTP server %s, ignoring: %m", smtp);
1311 else
1312 lease->servers[SD_DHCP_LEASE_SMTP].size = r;
1313 }
1314
1315 if (lpr) {
1316 r = deserialize_in_addrs(&lease->servers[SD_DHCP_LEASE_LPR].addr, lpr);
1317 if (r < 0)
1318 log_debug_errno(r, "Failed to deserialize LPR server %s, ignoring: %m", lpr);
1319 else
1320 lease->servers[SD_DHCP_LEASE_LPR].size = r;
1321 }
1322
1323 if (mtu) {
1324 r = safe_atou16(mtu, &lease->mtu);
1325 if (r < 0)
1326 log_debug_errno(r, "Failed to parse MTU %s, ignoring: %m", mtu);
1327 }
1328
1329 if (domains) {
1330 _cleanup_strv_free_ char **a = NULL;
1331 a = strv_split(domains, " ");
1332 if (!a)
1333 return -ENOMEM;
1334
1335 if (!strv_isempty(a))
1336 lease->search_domains = TAKE_PTR(a);
1337 }
1338
1339 if (routes) {
1340 r = deserialize_dhcp_routes(
1341 &lease->static_route,
1342 &lease->static_route_size,
1343 routes);
1344 if (r < 0)
1345 log_debug_errno(r, "Failed to parse DHCP routes %s, ignoring: %m", routes);
1346 }
1347
1348 if (lifetime) {
1349 r = safe_atou32(lifetime, &lease->lifetime);
1350 if (r < 0)
1351 log_debug_errno(r, "Failed to parse lifetime %s, ignoring: %m", lifetime);
1352 }
1353
1354 if (t1) {
1355 r = safe_atou32(t1, &lease->t1);
1356 if (r < 0)
1357 log_debug_errno(r, "Failed to parse T1 %s, ignoring: %m", t1);
1358 }
1359
1360 if (t2) {
1361 r = safe_atou32(t2, &lease->t2);
1362 if (r < 0)
1363 log_debug_errno(r, "Failed to parse T2 %s, ignoring: %m", t2);
1364 }
1365
1366 if (client_id_hex) {
1367 r = unhexmem(client_id_hex, SIZE_MAX, &lease->client_id, &lease->client_id_len);
1368 if (r < 0)
1369 log_debug_errno(r, "Failed to parse client ID %s, ignoring: %m", client_id_hex);
1370 }
1371
1372 if (vendor_specific_hex) {
1373 r = unhexmem(vendor_specific_hex, SIZE_MAX, &lease->vendor_specific, &lease->vendor_specific_len);
1374 if (r < 0)
1375 log_debug_errno(r, "Failed to parse vendor specific data %s, ignoring: %m", vendor_specific_hex);
1376 }
1377
1378 for (i = 0; i <= SD_DHCP_OPTION_PRIVATE_LAST - SD_DHCP_OPTION_PRIVATE_BASE; i++) {
1379 _cleanup_free_ void *data = NULL;
1380 size_t len;
1381
1382 if (!options[i])
1383 continue;
1384
1385 r = unhexmem(options[i], SIZE_MAX, &data, &len);
1386 if (r < 0) {
1387 log_debug_errno(r, "Failed to parse private DHCP option %s, ignoring: %m", options[i]);
1388 continue;
1389 }
1390
1391 r = dhcp_lease_insert_private_option(lease, SD_DHCP_OPTION_PRIVATE_BASE + i, data, len);
1392 if (r < 0)
1393 return r;
1394 }
1395
1396 *ret = TAKE_PTR(lease);
1397
1398 return 0;
1399 }
1400
1401 int dhcp_lease_set_default_subnet_mask(sd_dhcp_lease *lease) {
1402 struct in_addr address, mask;
1403 int r;
1404
1405 assert(lease);
1406
1407 if (lease->address == 0)
1408 return -ENODATA;
1409
1410 address.s_addr = lease->address;
1411
1412 /* fall back to the default subnet masks based on address class */
1413 r = in4_addr_default_subnet_mask(&address, &mask);
1414 if (r < 0)
1415 return r;
1416
1417 lease->subnet_mask = mask.s_addr;
1418 lease->have_subnet_mask = true;
1419
1420 return 0;
1421 }
1422
1423 int sd_dhcp_lease_get_client_id(sd_dhcp_lease *lease, const void **client_id, size_t *client_id_len) {
1424 assert_return(lease, -EINVAL);
1425 assert_return(client_id, -EINVAL);
1426 assert_return(client_id_len, -EINVAL);
1427
1428 if (!lease->client_id)
1429 return -ENODATA;
1430
1431 *client_id = lease->client_id;
1432 *client_id_len = lease->client_id_len;
1433
1434 return 0;
1435 }
1436
1437 int dhcp_lease_set_client_id(sd_dhcp_lease *lease, const void *client_id, size_t client_id_len) {
1438 assert_return(lease, -EINVAL);
1439 assert_return(client_id || client_id_len <= 0, -EINVAL);
1440
1441 if (client_id_len <= 0)
1442 lease->client_id = mfree(lease->client_id);
1443 else {
1444 void *p;
1445
1446 p = memdup(client_id, client_id_len);
1447 if (!p)
1448 return -ENOMEM;
1449
1450 free(lease->client_id);
1451 lease->client_id = p;
1452 lease->client_id_len = client_id_len;
1453 }
1454
1455 return 0;
1456 }
1457
1458 int sd_dhcp_lease_get_timezone(sd_dhcp_lease *lease, const char **tz) {
1459 assert_return(lease, -EINVAL);
1460 assert_return(tz, -EINVAL);
1461
1462 if (!lease->timezone)
1463 return -ENODATA;
1464
1465 *tz = lease->timezone;
1466 return 0;
1467 }
1468
1469 int sd_dhcp_route_get_destination(sd_dhcp_route *route, struct in_addr *destination) {
1470 assert_return(route, -EINVAL);
1471 assert_return(destination, -EINVAL);
1472
1473 *destination = route->dst_addr;
1474 return 0;
1475 }
1476
1477 int sd_dhcp_route_get_destination_prefix_length(sd_dhcp_route *route, uint8_t *length) {
1478 assert_return(route, -EINVAL);
1479 assert_return(length, -EINVAL);
1480
1481 *length = route->dst_prefixlen;
1482 return 0;
1483 }
1484
1485 int sd_dhcp_route_get_gateway(sd_dhcp_route *route, struct in_addr *gateway) {
1486 assert_return(route, -EINVAL);
1487 assert_return(gateway, -EINVAL);
1488
1489 *gateway = route->gw_addr;
1490 return 0;
1491 }
1492
1493 int sd_dhcp_route_get_option(sd_dhcp_route *route) {
1494 assert_return(route, -EINVAL);
1495
1496 return route->option;
1497 }
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