1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 Copyright © 2013 Intel Corporation. All rights reserved.
10 #include <sys/types.h>
13 #include "sd-dhcp-lease.h"
15 #include "alloc-util.h"
16 #include "dhcp-lease-internal.h"
17 #include "dhcp-protocol.h"
18 #include "dns-domain.h"
22 #include "hexdecoct.h"
23 #include "hostname-util.h"
24 #include "in-addr-util.h"
25 #include "network-internal.h"
26 #include "parse-util.h"
27 #include "stdio-util.h"
28 #include "string-util.h"
30 #include "tmpfile-util.h"
31 #include "unaligned.h"
33 int sd_dhcp_lease_get_address(sd_dhcp_lease
*lease
, struct in_addr
*addr
) {
34 assert_return(lease
, -EINVAL
);
35 assert_return(addr
, -EINVAL
);
37 if (lease
->address
== 0)
40 addr
->s_addr
= lease
->address
;
44 int sd_dhcp_lease_get_broadcast(sd_dhcp_lease
*lease
, struct in_addr
*addr
) {
45 assert_return(lease
, -EINVAL
);
46 assert_return(addr
, -EINVAL
);
48 if (!lease
->have_broadcast
)
51 addr
->s_addr
= lease
->broadcast
;
55 int sd_dhcp_lease_get_lifetime(sd_dhcp_lease
*lease
, uint32_t *lifetime
) {
56 assert_return(lease
, -EINVAL
);
57 assert_return(lifetime
, -EINVAL
);
59 if (lease
->lifetime
<= 0)
62 *lifetime
= lease
->lifetime
;
66 int sd_dhcp_lease_get_t1(sd_dhcp_lease
*lease
, uint32_t *t1
) {
67 assert_return(lease
, -EINVAL
);
68 assert_return(t1
, -EINVAL
);
77 int sd_dhcp_lease_get_t2(sd_dhcp_lease
*lease
, uint32_t *t2
) {
78 assert_return(lease
, -EINVAL
);
79 assert_return(t2
, -EINVAL
);
88 int sd_dhcp_lease_get_mtu(sd_dhcp_lease
*lease
, uint16_t *mtu
) {
89 assert_return(lease
, -EINVAL
);
90 assert_return(mtu
, -EINVAL
);
99 int sd_dhcp_lease_get_dns(sd_dhcp_lease
*lease
, const struct in_addr
**addr
) {
100 assert_return(lease
, -EINVAL
);
101 assert_return(addr
, -EINVAL
);
103 if (lease
->dns_size
<= 0)
107 return (int) lease
->dns_size
;
110 int sd_dhcp_lease_get_ntp(sd_dhcp_lease
*lease
, const struct in_addr
**addr
) {
111 assert_return(lease
, -EINVAL
);
112 assert_return(addr
, -EINVAL
);
114 if (lease
->ntp_size
<= 0)
118 return (int) lease
->ntp_size
;
121 int sd_dhcp_lease_get_sip(sd_dhcp_lease
*lease
, const struct in_addr
**addr
) {
122 assert_return(lease
, -EINVAL
);
123 assert_return(addr
, -EINVAL
);
125 if (lease
->sip_size
<= 0)
129 return (int) lease
->sip_size
;
132 int sd_dhcp_lease_get_domainname(sd_dhcp_lease
*lease
, const char **domainname
) {
133 assert_return(lease
, -EINVAL
);
134 assert_return(domainname
, -EINVAL
);
136 if (!lease
->domainname
)
139 *domainname
= lease
->domainname
;
143 int sd_dhcp_lease_get_hostname(sd_dhcp_lease
*lease
, const char **hostname
) {
144 assert_return(lease
, -EINVAL
);
145 assert_return(hostname
, -EINVAL
);
147 if (!lease
->hostname
)
150 *hostname
= lease
->hostname
;
154 int sd_dhcp_lease_get_root_path(sd_dhcp_lease
*lease
, const char **root_path
) {
155 assert_return(lease
, -EINVAL
);
156 assert_return(root_path
, -EINVAL
);
158 if (!lease
->root_path
)
161 *root_path
= lease
->root_path
;
165 int sd_dhcp_lease_get_router(sd_dhcp_lease
*lease
, const struct in_addr
**addr
) {
166 assert_return(lease
, -EINVAL
);
167 assert_return(addr
, -EINVAL
);
169 if (lease
->router_size
<= 0)
172 *addr
= lease
->router
;
173 return (int) lease
->router_size
;
176 int sd_dhcp_lease_get_netmask(sd_dhcp_lease
*lease
, struct in_addr
*addr
) {
177 assert_return(lease
, -EINVAL
);
178 assert_return(addr
, -EINVAL
);
180 if (!lease
->have_subnet_mask
)
183 addr
->s_addr
= lease
->subnet_mask
;
187 int sd_dhcp_lease_get_server_identifier(sd_dhcp_lease
*lease
, struct in_addr
*addr
) {
188 assert_return(lease
, -EINVAL
);
189 assert_return(addr
, -EINVAL
);
191 if (lease
->server_address
== 0)
194 addr
->s_addr
= lease
->server_address
;
198 int sd_dhcp_lease_get_next_server(sd_dhcp_lease
*lease
, struct in_addr
*addr
) {
199 assert_return(lease
, -EINVAL
);
200 assert_return(addr
, -EINVAL
);
202 if (lease
->next_server
== 0)
205 addr
->s_addr
= lease
->next_server
;
210 * The returned routes array must be freed by the caller.
211 * Route objects have the same lifetime of the lease and must not be freed.
213 int sd_dhcp_lease_get_routes(sd_dhcp_lease
*lease
, sd_dhcp_route
***routes
) {
217 assert_return(lease
, -EINVAL
);
218 assert_return(routes
, -EINVAL
);
220 if (lease
->static_route_size
<= 0)
223 ret
= new(sd_dhcp_route
*, lease
->static_route_size
);
227 for (i
= 0; i
< lease
->static_route_size
; i
++)
228 ret
[i
] = &lease
->static_route
[i
];
231 return (int) lease
->static_route_size
;
234 int sd_dhcp_lease_get_search_domains(sd_dhcp_lease
*lease
, char ***domains
) {
237 assert_return(lease
, -EINVAL
);
238 assert_return(domains
, -EINVAL
);
240 r
= strv_length(lease
->search_domains
);
242 *domains
= lease
->search_domains
;
249 int sd_dhcp_lease_get_vendor_specific(sd_dhcp_lease
*lease
, const void **data
, size_t *data_len
) {
250 assert_return(lease
, -EINVAL
);
251 assert_return(data
, -EINVAL
);
252 assert_return(data_len
, -EINVAL
);
254 if (lease
->vendor_specific_len
<= 0)
257 *data
= lease
->vendor_specific
;
258 *data_len
= lease
->vendor_specific_len
;
262 static sd_dhcp_lease
*dhcp_lease_free(sd_dhcp_lease
*lease
) {
265 while (lease
->private_options
) {
266 struct sd_dhcp_raw_option
*option
= lease
->private_options
;
268 LIST_REMOVE(options
, lease
->private_options
, option
);
274 free(lease
->root_path
);
276 free(lease
->timezone
);
277 free(lease
->hostname
);
278 free(lease
->domainname
);
282 free(lease
->static_route
);
283 free(lease
->client_id
);
284 free(lease
->vendor_specific
);
285 strv_free(lease
->search_domains
);
289 DEFINE_TRIVIAL_REF_UNREF_FUNC(sd_dhcp_lease
, sd_dhcp_lease
, dhcp_lease_free
);
291 static int lease_parse_u32(const uint8_t *option
, size_t len
, uint32_t *ret
, uint32_t min
) {
298 *ret
= unaligned_read_be32((be32_t
*) option
);
305 static int lease_parse_u16(const uint8_t *option
, size_t len
, uint16_t *ret
, uint16_t min
) {
312 *ret
= unaligned_read_be16((be16_t
*) option
);
319 static int lease_parse_be32(const uint8_t *option
, size_t len
, be32_t
*ret
) {
326 memcpy(ret
, option
, 4);
330 static int lease_parse_string(const uint8_t *option
, size_t len
, char **ret
) {
340 * One trailing NUL byte is OK, we don't mind. See:
341 * https://github.com/systemd/systemd/issues/1337
343 if (memchr(option
, 0, len
- 1))
346 string
= memdup_suffix0((const char *) option
, len
);
350 free_and_replace(*ret
, string
);
356 static int lease_parse_domain(const uint8_t *option
, size_t len
, char **ret
) {
357 _cleanup_free_
char *name
= NULL
, *normalized
= NULL
;
363 r
= lease_parse_string(option
, len
, &name
);
371 r
= dns_name_normalize(name
, 0, &normalized
);
375 if (is_localhost(normalized
))
378 if (dns_name_is_root(normalized
))
381 free_and_replace(*ret
, normalized
);
386 static int lease_parse_in_addrs(const uint8_t *option
, size_t len
, struct in_addr
**ret
, size_t *n_ret
) {
396 struct in_addr
*addresses
;
401 n_addresses
= len
/ 4;
403 addresses
= newdup(struct in_addr
, option
, n_addresses
);
409 *n_ret
= n_addresses
;
415 static int lease_parse_sip_server(const uint8_t *option
, size_t len
, struct in_addr
**ret
, size_t *n_ret
) {
425 struct in_addr
*addresses
;
433 addresses
= newdup(struct in_addr
, option
+ 1, n_addresses
);
439 *n_ret
= n_addresses
;
445 static int lease_parse_routes(
446 const uint8_t *option
, size_t len
,
447 struct sd_dhcp_route
**routes
, size_t *routes_size
, size_t *routes_allocated
) {
451 assert(option
|| len
<= 0);
454 assert(routes_allocated
);
462 if (!GREEDY_REALLOC(*routes
, *routes_allocated
, *routes_size
+ (len
/ 8)))
466 struct sd_dhcp_route
*route
= *routes
+ *routes_size
;
469 route
->option
= SD_DHCP_OPTION_STATIC_ROUTE
;
470 r
= in4_addr_default_prefixlen((struct in_addr
*) option
, &route
->dst_prefixlen
);
472 log_debug("Failed to determine destination prefix length from class based IP, ignoring");
476 assert_se(lease_parse_be32(option
, 4, &addr
.s_addr
) >= 0);
477 route
->dst_addr
= inet_makeaddr(inet_netof(addr
), 0);
480 assert_se(lease_parse_be32(option
, 4, &route
->gw_addr
.s_addr
) >= 0);
490 /* parses RFC3442 Classless Static Route Option */
491 static int lease_parse_classless_routes(
492 const uint8_t *option
, size_t len
,
493 struct sd_dhcp_route
**routes
, size_t *routes_size
, size_t *routes_allocated
) {
495 assert(option
|| len
<= 0);
498 assert(routes_allocated
);
503 /* option format: (subnet-mask-width significant-subnet-octets gateway-ip)* */
507 struct sd_dhcp_route
*route
;
509 if (!GREEDY_REALLOC(*routes
, *routes_allocated
, *routes_size
+ 1))
512 route
= *routes
+ *routes_size
;
513 route
->option
= SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE
;
515 dst_octets
= (*option
== 0 ? 0 : ((*option
- 1) / 8) + 1);
516 route
->dst_prefixlen
= *option
;
520 /* can't have more than 4 octets in IPv4 */
521 if (dst_octets
> 4 || len
< dst_octets
)
524 route
->dst_addr
.s_addr
= 0;
525 memcpy(&route
->dst_addr
.s_addr
, option
, dst_octets
);
526 option
+= dst_octets
;
532 assert_se(lease_parse_be32(option
, 4, &route
->gw_addr
.s_addr
) >= 0);
542 int dhcp_lease_parse_options(uint8_t code
, uint8_t len
, const void *option
, void *userdata
) {
543 sd_dhcp_lease
*lease
= userdata
;
550 case SD_DHCP_OPTION_IP_ADDRESS_LEASE_TIME
:
551 r
= lease_parse_u32(option
, len
, &lease
->lifetime
, 1);
553 log_debug_errno(r
, "Failed to parse lease time, ignoring: %m");
557 case SD_DHCP_OPTION_SERVER_IDENTIFIER
:
558 r
= lease_parse_be32(option
, len
, &lease
->server_address
);
560 log_debug_errno(r
, "Failed to parse server identifier, ignoring: %m");
564 case SD_DHCP_OPTION_SUBNET_MASK
:
565 r
= lease_parse_be32(option
, len
, &lease
->subnet_mask
);
567 log_debug_errno(r
, "Failed to parse subnet mask, ignoring: %m");
569 lease
->have_subnet_mask
= true;
572 case SD_DHCP_OPTION_BROADCAST
:
573 r
= lease_parse_be32(option
, len
, &lease
->broadcast
);
575 log_debug_errno(r
, "Failed to parse broadcast address, ignoring: %m");
577 lease
->have_broadcast
= true;
580 case SD_DHCP_OPTION_ROUTER
:
581 r
= lease_parse_in_addrs(option
, len
, &lease
->router
, &lease
->router_size
);
583 log_debug_errno(r
, "Failed to parse router addresses, ignoring: %m");
586 case SD_DHCP_OPTION_DOMAIN_NAME_SERVER
:
587 r
= lease_parse_in_addrs(option
, len
, &lease
->dns
, &lease
->dns_size
);
589 log_debug_errno(r
, "Failed to parse DNS server, ignoring: %m");
592 case SD_DHCP_OPTION_NTP_SERVER
:
593 r
= lease_parse_in_addrs(option
, len
, &lease
->ntp
, &lease
->ntp_size
);
595 log_debug_errno(r
, "Failed to parse NTP server, ignoring: %m");
598 case SD_DHCP_OPTION_SIP_SERVER
:
599 r
= lease_parse_sip_server(option
, len
, &lease
->sip
, &lease
->sip_size
);
601 log_debug_errno(r
, "Failed to parse SIP server, ignoring: %m");
604 case SD_DHCP_OPTION_STATIC_ROUTE
:
605 r
= lease_parse_routes(option
, len
, &lease
->static_route
, &lease
->static_route_size
, &lease
->static_route_allocated
);
607 log_debug_errno(r
, "Failed to parse static routes, ignoring: %m");
610 case SD_DHCP_OPTION_INTERFACE_MTU
:
611 r
= lease_parse_u16(option
, len
, &lease
->mtu
, 68);
613 log_debug_errno(r
, "Failed to parse MTU, ignoring: %m");
614 if (lease
->mtu
< DHCP_DEFAULT_MIN_SIZE
) {
615 log_debug("MTU value of %" PRIu16
" too small. Using default MTU value of %d instead.", lease
->mtu
, DHCP_DEFAULT_MIN_SIZE
);
616 lease
->mtu
= DHCP_DEFAULT_MIN_SIZE
;
621 case SD_DHCP_OPTION_DOMAIN_NAME
:
622 r
= lease_parse_domain(option
, len
, &lease
->domainname
);
624 log_debug_errno(r
, "Failed to parse domain name, ignoring: %m");
630 case SD_DHCP_OPTION_DOMAIN_SEARCH_LIST
:
631 r
= dhcp_lease_parse_search_domains(option
, len
, &lease
->search_domains
);
633 log_debug_errno(r
, "Failed to parse Domain Search List, ignoring: %m");
636 case SD_DHCP_OPTION_HOST_NAME
:
637 r
= lease_parse_domain(option
, len
, &lease
->hostname
);
639 log_debug_errno(r
, "Failed to parse host name, ignoring: %m");
645 case SD_DHCP_OPTION_ROOT_PATH
:
646 r
= lease_parse_string(option
, len
, &lease
->root_path
);
648 log_debug_errno(r
, "Failed to parse root path, ignoring: %m");
651 case SD_DHCP_OPTION_RENEWAL_T1_TIME
:
652 r
= lease_parse_u32(option
, len
, &lease
->t1
, 1);
654 log_debug_errno(r
, "Failed to parse T1 time, ignoring: %m");
657 case SD_DHCP_OPTION_REBINDING_T2_TIME
:
658 r
= lease_parse_u32(option
, len
, &lease
->t2
, 1);
660 log_debug_errno(r
, "Failed to parse T2 time, ignoring: %m");
663 case SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE
:
664 r
= lease_parse_classless_routes(
666 &lease
->static_route
,
667 &lease
->static_route_size
,
668 &lease
->static_route_allocated
);
670 log_debug_errno(r
, "Failed to parse classless routes, ignoring: %m");
673 case SD_DHCP_OPTION_NEW_TZDB_TIMEZONE
: {
674 _cleanup_free_
char *tz
= NULL
;
676 r
= lease_parse_string(option
, len
, &tz
);
678 log_debug_errno(r
, "Failed to parse timezone option, ignoring: %m");
682 if (!timezone_is_valid(tz
, LOG_DEBUG
)) {
683 log_debug_errno(r
, "Timezone is not valid, ignoring: %m");
687 free_and_replace(lease
->timezone
, tz
);
692 case SD_DHCP_OPTION_VENDOR_SPECIFIC
:
695 lease
->vendor_specific
= mfree(lease
->vendor_specific
);
699 p
= memdup(option
, len
);
703 free(lease
->vendor_specific
);
704 lease
->vendor_specific
= p
;
707 lease
->vendor_specific_len
= len
;
710 case SD_DHCP_OPTION_PRIVATE_BASE
... SD_DHCP_OPTION_PRIVATE_LAST
:
711 r
= dhcp_lease_insert_private_option(lease
, code
, option
, len
);
718 log_debug("Ignoring option DHCP option %"PRIu8
" while parsing.", code
);
725 /* Parses compressed domain names. */
726 int dhcp_lease_parse_search_domains(const uint8_t *option
, size_t len
, char ***domains
) {
727 _cleanup_strv_free_
char **names
= NULL
;
728 size_t pos
= 0, cnt
= 0;
732 assert_return(option
&& len
> 0, -ENODATA
);
735 _cleanup_free_
char *name
= NULL
;
736 size_t n
= 0, allocated
= 0;
737 size_t jump_barrier
= pos
, next_chunk
= 0;
747 } else if (c
<= 63) {
751 label
= (const char*) (option
+ pos
);
756 if (!GREEDY_REALLOC(name
, allocated
, n
+ !first
+ DNS_LABEL_ESCAPED_MAX
))
764 r
= dns_label_escape(label
, c
, name
+ n
, DNS_LABEL_ESCAPED_MAX
);
769 } else if ((c
& 0xc0) == 0xc0) {
779 ptr
= (uint16_t) (c
& ~0xc0) << 8 | (uint16_t) d
;
781 /* Jumps are limited to a "prior occurrence" (RFC-1035 4.1.4) */
782 if (ptr
>= jump_barrier
)
786 /* Save current location so we don't end up re-parsing what's parsed so far. */
795 if (!GREEDY_REALLOC(name
, allocated
, n
+ 1))
799 r
= strv_extend(&names
, name
);
809 *domains
= TAKE_PTR(names
);
814 int dhcp_lease_insert_private_option(sd_dhcp_lease
*lease
, uint8_t tag
, const void *data
, uint8_t len
) {
815 struct sd_dhcp_raw_option
*cur
, *option
;
819 LIST_FOREACH(options
, cur
, lease
->private_options
) {
822 if (tag
== cur
->tag
) {
823 log_debug("Ignoring duplicate option, tagged %i.", tag
);
828 option
= new(struct sd_dhcp_raw_option
, 1);
833 option
->length
= len
;
834 option
->data
= memdup(data
, len
);
840 LIST_INSERT_BEFORE(options
, lease
->private_options
, cur
, option
);
844 int dhcp_lease_new(sd_dhcp_lease
**ret
) {
845 sd_dhcp_lease
*lease
;
847 lease
= new0(sd_dhcp_lease
, 1);
857 int dhcp_lease_save(sd_dhcp_lease
*lease
, const char *lease_file
) {
858 _cleanup_free_
char *temp_path
= NULL
;
859 _cleanup_fclose_
FILE *f
= NULL
;
860 struct sd_dhcp_raw_option
*option
;
861 struct in_addr address
;
862 const struct in_addr
*addresses
;
863 const void *client_id
, *data
;
864 size_t client_id_len
, data_len
;
865 char sbuf
[INET_ADDRSTRLEN
];
868 _cleanup_free_ sd_dhcp_route
**routes
= NULL
;
869 char **search_domains
= NULL
;
870 uint32_t t1
, t2
, lifetime
;
876 r
= fopen_temporary(lease_file
, &f
, &temp_path
);
880 (void) fchmod(fileno(f
), 0644);
883 "# This is private data. Do not parse.\n");
885 r
= sd_dhcp_lease_get_address(lease
, &address
);
887 fprintf(f
, "ADDRESS=%s\n", inet_ntop(AF_INET
, &address
, sbuf
, sizeof(sbuf
)));
889 r
= sd_dhcp_lease_get_netmask(lease
, &address
);
891 fprintf(f
, "NETMASK=%s\n", inet_ntop(AF_INET
, &address
, sbuf
, sizeof(sbuf
)));
893 r
= sd_dhcp_lease_get_router(lease
, &addresses
);
896 serialize_in_addrs(f
, addresses
, r
, false, NULL
);
900 r
= sd_dhcp_lease_get_server_identifier(lease
, &address
);
902 fprintf(f
, "SERVER_ADDRESS=%s\n", inet_ntop(AF_INET
, &address
, sbuf
, sizeof(sbuf
)));
904 r
= sd_dhcp_lease_get_next_server(lease
, &address
);
906 fprintf(f
, "NEXT_SERVER=%s\n", inet_ntop(AF_INET
, &address
, sbuf
, sizeof(sbuf
)));
908 r
= sd_dhcp_lease_get_broadcast(lease
, &address
);
910 fprintf(f
, "BROADCAST=%s\n", inet_ntop(AF_INET
, &address
, sbuf
, sizeof(sbuf
)));
912 r
= sd_dhcp_lease_get_mtu(lease
, &mtu
);
914 fprintf(f
, "MTU=%" PRIu16
"\n", mtu
);
916 r
= sd_dhcp_lease_get_t1(lease
, &t1
);
918 fprintf(f
, "T1=%" PRIu32
"\n", t1
);
920 r
= sd_dhcp_lease_get_t2(lease
, &t2
);
922 fprintf(f
, "T2=%" PRIu32
"\n", t2
);
924 r
= sd_dhcp_lease_get_lifetime(lease
, &lifetime
);
926 fprintf(f
, "LIFETIME=%" PRIu32
"\n", lifetime
);
928 r
= sd_dhcp_lease_get_dns(lease
, &addresses
);
931 serialize_in_addrs(f
, addresses
, r
, false, NULL
);
935 r
= sd_dhcp_lease_get_ntp(lease
, &addresses
);
938 serialize_in_addrs(f
, addresses
, r
, false, NULL
);
942 r
= sd_dhcp_lease_get_sip(lease
, &addresses
);
945 serialize_in_addrs(f
, addresses
, r
, false, NULL
);
949 r
= sd_dhcp_lease_get_domainname(lease
, &string
);
951 fprintf(f
, "DOMAINNAME=%s\n", string
);
953 r
= sd_dhcp_lease_get_search_domains(lease
, &search_domains
);
955 fputs("DOMAIN_SEARCH_LIST=", f
);
956 fputstrv(f
, search_domains
, NULL
, NULL
);
960 r
= sd_dhcp_lease_get_hostname(lease
, &string
);
962 fprintf(f
, "HOSTNAME=%s\n", string
);
964 r
= sd_dhcp_lease_get_root_path(lease
, &string
);
966 fprintf(f
, "ROOT_PATH=%s\n", string
);
968 r
= sd_dhcp_lease_get_routes(lease
, &routes
);
970 serialize_dhcp_routes(f
, "ROUTES", routes
, r
);
972 r
= sd_dhcp_lease_get_timezone(lease
, &string
);
974 fprintf(f
, "TIMEZONE=%s\n", string
);
976 r
= sd_dhcp_lease_get_client_id(lease
, &client_id
, &client_id_len
);
978 _cleanup_free_
char *client_id_hex
= NULL
;
980 client_id_hex
= hexmem(client_id
, client_id_len
);
981 if (!client_id_hex
) {
985 fprintf(f
, "CLIENTID=%s\n", client_id_hex
);
988 r
= sd_dhcp_lease_get_vendor_specific(lease
, &data
, &data_len
);
990 _cleanup_free_
char *option_hex
= NULL
;
992 option_hex
= hexmem(data
, data_len
);
997 fprintf(f
, "VENDOR_SPECIFIC=%s\n", option_hex
);
1000 LIST_FOREACH(options
, option
, lease
->private_options
) {
1001 char key
[STRLEN("OPTION_000")+1];
1003 xsprintf(key
, "OPTION_%" PRIu8
, option
->tag
);
1004 r
= serialize_dhcp_option(f
, key
, option
->data
, option
->length
);
1009 r
= fflush_and_check(f
);
1013 if (rename(temp_path
, lease_file
) < 0) {
1022 (void) unlink(temp_path
);
1024 return log_error_errno(r
, "Failed to save lease data %s: %m", lease_file
);
1027 int dhcp_lease_load(sd_dhcp_lease
**ret
, const char *lease_file
) {
1029 _cleanup_(sd_dhcp_lease_unrefp
) sd_dhcp_lease
*lease
= NULL
;
1034 *server_address
= NULL
,
1035 *next_server
= NULL
,
1043 *client_id_hex
= NULL
,
1044 *vendor_specific_hex
= NULL
,
1048 *options
[SD_DHCP_OPTION_PRIVATE_LAST
- SD_DHCP_OPTION_PRIVATE_BASE
+ 1] = {};
1055 r
= dhcp_lease_new(&lease
);
1059 r
= parse_env_file(NULL
, lease_file
,
1060 "ADDRESS", &address
,
1062 "NETMASK", &netmask
,
1063 "SERVER_IDENTIFIER", &server_address
,
1064 "NEXT_SERVER", &next_server
,
1065 "BROADCAST", &broadcast
,
1070 "DOMAINNAME", &lease
->domainname
,
1071 "HOSTNAME", &lease
->hostname
,
1072 "DOMAIN_SEARCH_LIST", &domains
,
1073 "ROOT_PATH", &lease
->root_path
,
1075 "CLIENTID", &client_id_hex
,
1076 "TIMEZONE", &lease
->timezone
,
1077 "VENDOR_SPECIFIC", &vendor_specific_hex
,
1078 "LIFETIME", &lifetime
,
1081 "OPTION_224", &options
[0],
1082 "OPTION_225", &options
[1],
1083 "OPTION_226", &options
[2],
1084 "OPTION_227", &options
[3],
1085 "OPTION_228", &options
[4],
1086 "OPTION_229", &options
[5],
1087 "OPTION_230", &options
[6],
1088 "OPTION_231", &options
[7],
1089 "OPTION_232", &options
[8],
1090 "OPTION_233", &options
[9],
1091 "OPTION_234", &options
[10],
1092 "OPTION_235", &options
[11],
1093 "OPTION_236", &options
[12],
1094 "OPTION_237", &options
[13],
1095 "OPTION_238", &options
[14],
1096 "OPTION_239", &options
[15],
1097 "OPTION_240", &options
[16],
1098 "OPTION_241", &options
[17],
1099 "OPTION_242", &options
[18],
1100 "OPTION_243", &options
[19],
1101 "OPTION_244", &options
[20],
1102 "OPTION_245", &options
[21],
1103 "OPTION_246", &options
[22],
1104 "OPTION_247", &options
[23],
1105 "OPTION_248", &options
[24],
1106 "OPTION_249", &options
[25],
1107 "OPTION_250", &options
[26],
1108 "OPTION_251", &options
[27],
1109 "OPTION_252", &options
[28],
1110 "OPTION_253", &options
[29],
1111 "OPTION_254", &options
[30]);
1116 r
= inet_pton(AF_INET
, address
, &lease
->address
);
1118 log_debug("Failed to parse address %s, ignoring.", address
);
1122 r
= deserialize_in_addrs(&lease
->router
, router
);
1124 log_debug_errno(r
, "Failed to deserialize router addresses %s, ignoring: %m", router
);
1126 lease
->router_size
= r
;
1130 r
= inet_pton(AF_INET
, netmask
, &lease
->subnet_mask
);
1132 log_debug("Failed to parse netmask %s, ignoring.", netmask
);
1134 lease
->have_subnet_mask
= true;
1137 if (server_address
) {
1138 r
= inet_pton(AF_INET
, server_address
, &lease
->server_address
);
1140 log_debug("Failed to parse server address %s, ignoring.", server_address
);
1144 r
= inet_pton(AF_INET
, next_server
, &lease
->next_server
);
1146 log_debug("Failed to parse next server %s, ignoring.", next_server
);
1150 r
= inet_pton(AF_INET
, broadcast
, &lease
->broadcast
);
1152 log_debug("Failed to parse broadcast address %s, ignoring.", broadcast
);
1154 lease
->have_broadcast
= true;
1158 r
= deserialize_in_addrs(&lease
->dns
, dns
);
1160 log_debug_errno(r
, "Failed to deserialize DNS servers %s, ignoring: %m", dns
);
1162 lease
->dns_size
= r
;
1166 r
= deserialize_in_addrs(&lease
->ntp
, ntp
);
1168 log_debug_errno(r
, "Failed to deserialize NTP servers %s, ignoring: %m", ntp
);
1170 lease
->ntp_size
= r
;
1174 r
= deserialize_in_addrs(&lease
->sip
, sip
);
1176 log_debug_errno(r
, "Failed to deserialize SIP servers %s, ignoring: %m", sip
);
1178 lease
->ntp_size
= r
;
1182 r
= safe_atou16(mtu
, &lease
->mtu
);
1184 log_debug_errno(r
, "Failed to parse MTU %s, ignoring: %m", mtu
);
1188 _cleanup_strv_free_
char **a
= NULL
;
1189 a
= strv_split(domains
, " ");
1193 if (!strv_isempty(a
)) {
1194 lease
->search_domains
= a
;
1200 r
= deserialize_dhcp_routes(
1201 &lease
->static_route
,
1202 &lease
->static_route_size
,
1203 &lease
->static_route_allocated
,
1206 log_debug_errno(r
, "Failed to parse DHCP routes %s, ignoring: %m", routes
);
1210 r
= safe_atou32(lifetime
, &lease
->lifetime
);
1212 log_debug_errno(r
, "Failed to parse lifetime %s, ignoring: %m", lifetime
);
1216 r
= safe_atou32(t1
, &lease
->t1
);
1218 log_debug_errno(r
, "Failed to parse T1 %s, ignoring: %m", t1
);
1222 r
= safe_atou32(t2
, &lease
->t2
);
1224 log_debug_errno(r
, "Failed to parse T2 %s, ignoring: %m", t2
);
1227 if (client_id_hex
) {
1228 r
= unhexmem(client_id_hex
, (size_t) -1, &lease
->client_id
, &lease
->client_id_len
);
1230 log_debug_errno(r
, "Failed to parse client ID %s, ignoring: %m", client_id_hex
);
1233 if (vendor_specific_hex
) {
1234 r
= unhexmem(vendor_specific_hex
, (size_t) -1, &lease
->vendor_specific
, &lease
->vendor_specific_len
);
1236 log_debug_errno(r
, "Failed to parse vendor specific data %s, ignoring: %m", vendor_specific_hex
);
1239 for (i
= 0; i
<= SD_DHCP_OPTION_PRIVATE_LAST
- SD_DHCP_OPTION_PRIVATE_BASE
; i
++) {
1240 _cleanup_free_
void *data
= NULL
;
1246 r
= unhexmem(options
[i
], (size_t) -1, &data
, &len
);
1248 log_debug_errno(r
, "Failed to parse private DHCP option %s, ignoring: %m", options
[i
]);
1252 r
= dhcp_lease_insert_private_option(lease
, SD_DHCP_OPTION_PRIVATE_BASE
+ i
, data
, len
);
1257 *ret
= TAKE_PTR(lease
);
1262 int dhcp_lease_set_default_subnet_mask(sd_dhcp_lease
*lease
) {
1263 struct in_addr address
, mask
;
1268 if (lease
->address
== 0)
1271 address
.s_addr
= lease
->address
;
1273 /* fall back to the default subnet masks based on address class */
1274 r
= in4_addr_default_subnet_mask(&address
, &mask
);
1278 lease
->subnet_mask
= mask
.s_addr
;
1279 lease
->have_subnet_mask
= true;
1284 int sd_dhcp_lease_get_client_id(sd_dhcp_lease
*lease
, const void **client_id
, size_t *client_id_len
) {
1285 assert_return(lease
, -EINVAL
);
1286 assert_return(client_id
, -EINVAL
);
1287 assert_return(client_id_len
, -EINVAL
);
1289 if (!lease
->client_id
)
1292 *client_id
= lease
->client_id
;
1293 *client_id_len
= lease
->client_id_len
;
1298 int dhcp_lease_set_client_id(sd_dhcp_lease
*lease
, const void *client_id
, size_t client_id_len
) {
1299 assert_return(lease
, -EINVAL
);
1300 assert_return(client_id
|| client_id_len
<= 0, -EINVAL
);
1302 if (client_id_len
<= 0)
1303 lease
->client_id
= mfree(lease
->client_id
);
1307 p
= memdup(client_id
, client_id_len
);
1311 free(lease
->client_id
);
1312 lease
->client_id
= p
;
1313 lease
->client_id_len
= client_id_len
;
1319 int sd_dhcp_lease_get_timezone(sd_dhcp_lease
*lease
, const char **tz
) {
1320 assert_return(lease
, -EINVAL
);
1321 assert_return(tz
, -EINVAL
);
1323 if (!lease
->timezone
)
1326 *tz
= lease
->timezone
;
1330 int sd_dhcp_route_get_destination(sd_dhcp_route
*route
, struct in_addr
*destination
) {
1331 assert_return(route
, -EINVAL
);
1332 assert_return(destination
, -EINVAL
);
1334 *destination
= route
->dst_addr
;
1338 int sd_dhcp_route_get_destination_prefix_length(sd_dhcp_route
*route
, uint8_t *length
) {
1339 assert_return(route
, -EINVAL
);
1340 assert_return(length
, -EINVAL
);
1342 *length
= route
->dst_prefixlen
;
1346 int sd_dhcp_route_get_gateway(sd_dhcp_route
*route
, struct in_addr
*gateway
) {
1347 assert_return(route
, -EINVAL
);
1348 assert_return(gateway
, -EINVAL
);
1350 *gateway
= route
->gw_addr
;
1354 int sd_dhcp_route_get_option(sd_dhcp_route
*route
) {
1355 assert_return(route
, -EINVAL
);
1357 return route
->option
;