1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
6 This file is part of systemd.
8 Copyright 2014 Lennart Poettering
10 systemd is free software; you can redistribute it and/or modify it
11 under the terms of the GNU Lesser General Public License as published by
12 the Free Software Foundation; either version 2.1 of the License, or
13 (at your option) any later version.
15 systemd is distributed in the hope that it will be useful, but
16 WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 Lesser General Public License for more details.
20 You should have received a copy of the GNU Lesser General Public License
21 along with systemd; If not, see <http://www.gnu.org/licenses/>.
24 #include <netinet/in.h>
29 #include "in-addr-util.h"
32 typedef struct DnsResourceKey DnsResourceKey
;
33 typedef struct DnsResourceRecord DnsResourceRecord
;
34 typedef struct DnsTxtItem DnsTxtItem
;
37 #define DNSKEY_FLAG_ZONE_KEY (UINT16_C(1) << 8)
38 #define DNSKEY_FLAG_SEP (UINT16_C(1) << 0)
41 #define MDNS_RR_CACHE_FLUSH (UINT16_C(1) << 15)
43 /* DNSSEC algorithm identifiers, see
44 * http://tools.ietf.org/html/rfc4034#appendix-A.1 and
45 * https://www.iana.org/assignments/dns-sec-alg-numbers/dns-sec-alg-numbers.xhtml */
47 DNSSEC_ALGORITHM_RSAMD5
= 1,
51 DNSSEC_ALGORITHM_RSASHA1
,
52 DNSSEC_ALGORITHM_DSA_NSEC3_SHA1
,
53 DNSSEC_ALGORITHM_RSASHA1_NSEC3_SHA1
,
54 DNSSEC_ALGORITHM_RSASHA256
= 8, /* RFC 5702 */
55 DNSSEC_ALGORITHM_RSASHA512
= 10, /* RFC 5702 */
56 DNSSEC_ALGORITHM_INDIRECT
= 252,
57 DNSSEC_ALGORITHM_PRIVATEDNS
,
58 DNSSEC_ALGORITHM_PRIVATEOID
,
59 _DNSSEC_ALGORITHM_MAX_DEFINED
62 /* DNSSEC digest identifiers, see
63 * https://www.iana.org/assignments/ds-rr-types/ds-rr-types.xhtml */
65 DNSSEC_DIGEST_SHA1
= 1,
66 DNSSEC_DIGEST_SHA256
= 2,
67 _DNSSEC_DIGEST_MAX_DEFINED
70 struct DnsResourceKey
{
73 char *_name
; /* don't access directy, use DNS_RESOURCE_KEY_NAME()! */
76 /* Creates a temporary resource key. This is only useful to quickly
77 * look up something, without allocating a full DnsResourceKey object
78 * for it. Note that it is not OK to take references to this kind of
79 * resource key object. */
80 #define DNS_RESOURCE_KEY_CONST(c, t, n) \
82 .n_ref = (unsigned) -1, \
91 LIST_FIELDS(DnsTxtItem
, items
);
95 struct DnsResourceRecord
{
100 bool wire_format_canonical
:1;
102 size_t wire_format_size
;
103 size_t wire_format_rdata_offset
;
119 } ptr
, ns
, cname
, dname
;
131 struct in_addr in_addr
;
135 struct in6_addr in6_addr
;
171 /* https://tools.ietf.org/html/rfc4255#section-3.1 */
176 size_t fingerprint_size
;
179 /* http://tools.ietf.org/html/rfc4034#section-2.1 */
188 /* http://tools.ietf.org/html/rfc4034#section-3.1 */
190 uint16_t type_covered
;
193 uint32_t original_ttl
;
199 size_t signature_size
;
202 /* https://tools.ietf.org/html/rfc4034#section-4.1 */
204 char *next_domain_name
;
214 void *next_hashed_name
;
215 size_t next_hashed_name_size
;
221 static inline const char* DNS_RESOURCE_KEY_NAME(const DnsResourceKey
*key
) {
222 if (_unlikely_(!key
))
228 return (char*) key
+ sizeof(DnsResourceKey
);
231 DnsResourceKey
* dns_resource_key_new(uint16_t class, uint16_t type
, const char *name
);
232 DnsResourceKey
* dns_resource_key_new_redirect(const DnsResourceKey
*key
, const DnsResourceRecord
*cname
);
233 int dns_resource_key_new_append_suffix(DnsResourceKey
**ret
, DnsResourceKey
*key
, char *name
);
234 DnsResourceKey
* dns_resource_key_new_consume(uint16_t class, uint16_t type
, char *name
);
235 DnsResourceKey
* dns_resource_key_ref(DnsResourceKey
*key
);
236 DnsResourceKey
* dns_resource_key_unref(DnsResourceKey
*key
);
237 bool dns_resource_key_is_address(const DnsResourceKey
*key
);
238 int dns_resource_key_equal(const DnsResourceKey
*a
, const DnsResourceKey
*b
);
239 int dns_resource_key_match_rr(const DnsResourceKey
*key
, DnsResourceRecord
*rr
, const char *search_domain
);
240 int dns_resource_key_match_cname_or_dname(const DnsResourceKey
*key
, const DnsResourceKey
*cname
, const char *search_domain
);
241 int dns_resource_key_match_soa(const DnsResourceKey
*key
, const DnsResourceKey
*soa
);
242 int dns_resource_key_to_string(const DnsResourceKey
*key
, char **ret
);
243 DEFINE_TRIVIAL_CLEANUP_FUNC(DnsResourceKey
*, dns_resource_key_unref
);
245 static inline bool dns_key_is_shared(const DnsResourceKey
*key
) {
246 return IN_SET(key
->type
, DNS_TYPE_PTR
);
249 DnsResourceRecord
* dns_resource_record_new(DnsResourceKey
*key
);
250 DnsResourceRecord
* dns_resource_record_new_full(uint16_t class, uint16_t type
, const char *name
);
251 DnsResourceRecord
* dns_resource_record_ref(DnsResourceRecord
*rr
);
252 DnsResourceRecord
* dns_resource_record_unref(DnsResourceRecord
*rr
);
253 int dns_resource_record_new_reverse(DnsResourceRecord
**ret
, int family
, const union in_addr_union
*address
, const char *name
);
254 int dns_resource_record_new_address(DnsResourceRecord
**ret
, int family
, const union in_addr_union
*address
, const char *name
);
255 int dns_resource_record_equal(const DnsResourceRecord
*a
, const DnsResourceRecord
*b
);
256 int dns_resource_record_to_string(const DnsResourceRecord
*rr
, char **ret
);
257 DEFINE_TRIVIAL_CLEANUP_FUNC(DnsResourceRecord
*, dns_resource_record_unref
);
259 int dns_resource_record_to_wire_format(DnsResourceRecord
*rr
, bool canonical
);
261 DnsTxtItem
*dns_txt_item_free_all(DnsTxtItem
*i
);
262 bool dns_txt_item_equal(DnsTxtItem
*a
, DnsTxtItem
*b
);
264 extern const struct hash_ops dns_resource_key_hash_ops
;
266 const char* dnssec_algorithm_to_string(int i
) _const_
;
267 int dnssec_algorithm_from_string(const char *s
) _pure_
;
269 const char *dnssec_digest_to_string(int i
) _const_
;
270 int dnssec_digest_from_string(const char *s
) _pure_
;