[thirdparty/systemd.git] / src / resolve / resolved-dns-rr.h

/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/

#pragma once

/***
  This file is part of systemd.

  Copyright 2014 Lennart Poettering

  systemd is free software; you can redistribute it and/or modify it
  under the terms of the GNU Lesser General Public License as published by
  the Free Software Foundation; either version 2.1 of the License, or
  (at your option) any later version.

  systemd is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public License
  along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/

#include <netinet/in.h>

#include "bitmap.h"
#include "dns-type.h"
#include "hashmap.h"
#include "in-addr-util.h"
#include "list.h"

typedef struct DnsResourceKey DnsResourceKey;
typedef struct DnsResourceRecord DnsResourceRecord;
typedef struct DnsTxtItem DnsTxtItem;

/* DNSKEY RR flags */
#define DNSKEY_FLAG_SEP      (UINT16_C(1) << 0)
#define DNSKEY_FLAG_REVOKE   (UINT16_C(1) << 7)
#define DNSKEY_FLAG_ZONE_KEY (UINT16_C(1) << 8)

/* mDNS RR flags */
#define MDNS_RR_CACHE_FLUSH  (UINT16_C(1) << 15)

/* DNSSEC algorithm identifiers, see
 * http://tools.ietf.org/html/rfc4034#appendix-A.1 and
 * https://www.iana.org/assignments/dns-sec-alg-numbers/dns-sec-alg-numbers.xhtml */
enum {
        DNSSEC_ALGORITHM_RSAMD5 = 1,
        DNSSEC_ALGORITHM_DH,
        DNSSEC_ALGORITHM_DSA,
        DNSSEC_ALGORITHM_ECC,
        DNSSEC_ALGORITHM_RSASHA1,
        DNSSEC_ALGORITHM_DSA_NSEC3_SHA1,
        DNSSEC_ALGORITHM_RSASHA1_NSEC3_SHA1,
        DNSSEC_ALGORITHM_RSASHA256 = 8,        /* RFC 5702 */
        DNSSEC_ALGORITHM_RSASHA512 = 10,       /* RFC 5702 */
        DNSSEC_ALGORITHM_ECC_GOST = 12,        /* RFC 5933 */
        DNSSEC_ALGORITHM_ECDSAP256SHA256 = 13, /* RFC 6605 */
        DNSSEC_ALGORITHM_ECDSAP384SHA384 = 14, /* RFC 6605 */
        DNSSEC_ALGORITHM_INDIRECT = 252,
        DNSSEC_ALGORITHM_PRIVATEDNS,
        DNSSEC_ALGORITHM_PRIVATEOID,
        _DNSSEC_ALGORITHM_MAX_DEFINED
};

/* DNSSEC digest identifiers, see
 * https://www.iana.org/assignments/ds-rr-types/ds-rr-types.xhtml */
enum {
        DNSSEC_DIGEST_SHA1 = 1,
        DNSSEC_DIGEST_SHA256 = 2,              /* RFC 4509 */
        DNSSEC_DIGEST_GOST_R_34_11_94 = 3,     /* RFC 5933 */
        DNSSEC_DIGEST_SHA384 = 4,              /* RFC 6605 */
        _DNSSEC_DIGEST_MAX_DEFINED
};

/* DNSSEC NSEC3 hash algorithms, see
 * https://www.iana.org/assignments/dnssec-nsec3-parameters/dnssec-nsec3-parameters.xhtml */
enum {
        NSEC3_ALGORITHM_SHA1 = 1,
        _NSEC3_ALGORITHM_MAX_DEFINED
};

struct DnsResourceKey {
        unsigned n_ref;
        uint16_t class, type;
        char *_name; /* don't access directy, use DNS_RESOURCE_KEY_NAME()! */
};

/* Creates a temporary resource key. This is only useful to quickly
 * look up something, without allocating a full DnsResourceKey object
 * for it. Note that it is not OK to take references to this kind of
 * resource key object. */
#define DNS_RESOURCE_KEY_CONST(c, t, n)                 \
        ((DnsResourceKey) {                             \
                .n_ref = (unsigned) -1,                 \
                .class = c,                             \
                .type = t,                              \
                ._name = (char*) n,                     \
        })


struct DnsTxtItem {
        size_t length;
        LIST_FIELDS(DnsTxtItem, items);
        uint8_t data[];
};

struct DnsResourceRecord {
        unsigned n_ref;
        DnsResourceKey *key;
        char *to_string;
        uint32_t ttl;
        usec_t expiry; /* RRSIG signature expiry */
        bool unparseable:1;
        bool wire_format_canonical:1;
        void *wire_format;
        size_t wire_format_size;
        size_t wire_format_rdata_offset;
        union {
                struct {
                        void *data;
                        size_t size;
                } generic, opt;

                struct {
                        uint16_t priority;
                        uint16_t weight;
                        uint16_t port;
                        char *name;
                } srv;

                struct {
                        char *name;
                } ptr, ns, cname, dname;

                struct {
                        char *cpu;
                        char *os;
                } hinfo;

                struct {
                        DnsTxtItem *items;
                } txt, spf;

                struct {
                        struct in_addr in_addr;
                } a;

                struct {
                        struct in6_addr in6_addr;
                } aaaa;

                struct {
                        char *mname;
                        char *rname;
                        uint32_t serial;
                        uint32_t refresh;
                        uint32_t retry;
                        uint32_t expire;
                        uint32_t minimum;
                } soa;

                struct {
                        uint16_t priority;
                        char *exchange;
                } mx;

                /* https://tools.ietf.org/html/rfc1876 */
                struct {
                        uint8_t version;
                        uint8_t size;
                        uint8_t horiz_pre;
                        uint8_t vert_pre;
                        uint32_t latitude;
                        uint32_t longitude;
                        uint32_t altitude;
                } loc;

                /* https://tools.ietf.org/html/rfc4255#section-3.1 */
                struct {
                        uint8_t algorithm;
                        uint8_t fptype;
                        void *fingerprint;
                        size_t fingerprint_size;
                } sshfp;

                /* http://tools.ietf.org/html/rfc4034#section-2.1 */
                struct {
                        uint16_t flags;
                        uint8_t protocol;
                        uint8_t algorithm;
                        void* key;
                        size_t key_size;
                } dnskey;

                /* http://tools.ietf.org/html/rfc4034#section-3.1 */
                struct {
                        uint16_t type_covered;
                        uint8_t algorithm;
                        uint8_t labels;
                        uint32_t original_ttl;
                        uint32_t expiration;
                        uint32_t inception;
                        uint16_t key_tag;
                        char *signer;
                        void *signature;
                        size_t signature_size;
                } rrsig;

                /* https://tools.ietf.org/html/rfc4034#section-4.1 */
                struct {
                        char *next_domain_name;
                        Bitmap *types;
                } nsec;

                /* https://tools.ietf.org/html/rfc4034#section-5.1 */
                struct {
                        uint16_t key_tag;
                        uint8_t algorithm;
                        uint8_t digest_type;
                        void *digest;
                        size_t digest_size;
                } ds;

                struct {
                        uint8_t algorithm;
                        uint8_t flags;
                        uint16_t iterations;
                        void *salt;
                        size_t salt_size;
                        void *next_hashed_name;
                        size_t next_hashed_name_size;
                        Bitmap *types;
                } nsec3;
        };
};

static inline const char* DNS_RESOURCE_KEY_NAME(const DnsResourceKey *key) {
        if (!key)
                return NULL;

        if (key->_name)
                return key->_name;

        return (char*) key + sizeof(DnsResourceKey);
}

static inline const void* DNS_RESOURCE_RECORD_RDATA(DnsResourceRecord *rr) {
        if (!rr)
                return NULL;

        if (!rr->wire_format)
                return NULL;

        assert(rr->wire_format_rdata_offset <= rr->wire_format_size);
        return (uint8_t*) rr->wire_format + rr->wire_format_rdata_offset;
}

static inline size_t DNS_RESOURCE_RECORD_RDATA_SIZE(DnsResourceRecord *rr) {
        if (!rr)
                return 0;
        if (!rr->wire_format)
                return 0;

        assert(rr->wire_format_rdata_offset <= rr->wire_format_size);
        return rr->wire_format_size - rr->wire_format_rdata_offset;
}

DnsResourceKey* dns_resource_key_new(uint16_t class, uint16_t type, const char *name);
DnsResourceKey* dns_resource_key_new_redirect(const DnsResourceKey *key, const DnsResourceRecord *cname);
int dns_resource_key_new_append_suffix(DnsResourceKey **ret, DnsResourceKey *key, char *name);
DnsResourceKey* dns_resource_key_new_consume(uint16_t class, uint16_t type, char *name);
DnsResourceKey* dns_resource_key_ref(DnsResourceKey *key);
DnsResourceKey* dns_resource_key_unref(DnsResourceKey *key);
bool dns_resource_key_is_address(const DnsResourceKey *key);
int dns_resource_key_equal(const DnsResourceKey *a, const DnsResourceKey *b);
int dns_resource_key_match_rr(const DnsResourceKey *key, DnsResourceRecord *rr, const char *search_domain);
int dns_resource_key_match_cname_or_dname(const DnsResourceKey *key, const DnsResourceKey *cname, const char *search_domain);
int dns_resource_key_match_soa(const DnsResourceKey *key, const DnsResourceKey *soa);
int dns_resource_key_to_string(const DnsResourceKey *key, char **ret);
DEFINE_TRIVIAL_CLEANUP_FUNC(DnsResourceKey*, dns_resource_key_unref);

static inline bool dns_key_is_shared(const DnsResourceKey *key) {
        return IN_SET(key->type, DNS_TYPE_PTR);
}

DnsResourceRecord* dns_resource_record_new(DnsResourceKey *key);
DnsResourceRecord* dns_resource_record_new_full(uint16_t class, uint16_t type, const char *name);
DnsResourceRecord* dns_resource_record_ref(DnsResourceRecord *rr);
DnsResourceRecord* dns_resource_record_unref(DnsResourceRecord *rr);
int dns_resource_record_new_reverse(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *name);
int dns_resource_record_new_address(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *name);
int dns_resource_record_equal(const DnsResourceRecord *a, const DnsResourceRecord *b);
const char* dns_resource_record_to_string(DnsResourceRecord *rr);
DEFINE_TRIVIAL_CLEANUP_FUNC(DnsResourceRecord*, dns_resource_record_unref);

int dns_resource_record_to_wire_format(DnsResourceRecord *rr, bool canonical);

DnsTxtItem *dns_txt_item_free_all(DnsTxtItem *i);
bool dns_txt_item_equal(DnsTxtItem *a, DnsTxtItem *b);

extern const struct hash_ops dns_resource_key_hash_ops;
extern const struct hash_ops dns_resource_record_hash_ops;

int dnssec_algorithm_to_string_alloc(int i, char **ret);
int dnssec_algorithm_from_string(const char *s) _pure_;

int dnssec_digest_to_string_alloc(int i, char **ret);
int dnssec_digest_from_string(const char *s) _pure_;
Commit	Line	Data
74b2466e LP	1	/-- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil --/
	2
	3	#pragma once
	4
	5	/***
	6	This file is part of systemd.
	7
	8	Copyright 2014 Lennart Poettering
	9
	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.
	14
	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.
	19
	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/>.
	22	***/
	23
74b2466e LP	24	#include <netinet/in.h>
74b2466e LP	25
50f1e641	26	#include "bitmap.h"
71d35b6b	27	#include "dns-type.h"
322345fd	28	#include "hashmap.h"
623a4c97	29	#include "in-addr-util.h"
2001c805	30	#include "list.h"
74b2466e LP	31
	32	typedef struct DnsResourceKey DnsResourceKey;
	33	typedef struct DnsResourceRecord DnsResourceRecord;
2001c805	34	typedef struct DnsTxtItem DnsTxtItem;
74b2466e	35
8730bccf	36	/* DNSKEY RR flags */
8730bccf	37	#define DNSKEY_FLAG_SEP (UINT16_C(1) << 0)
28b8191e LP	38	#define DNSKEY_FLAG_REVOKE (UINT16_C(1) << 7)
28b8191e LP	39	#define DNSKEY_FLAG_ZONE_KEY (UINT16_C(1) << 8)
8730bccf	40
23502de3 DM	41	/* mDNS RR flags */
	42	#define MDNS_RR_CACHE_FLUSH (UINT16_C(1) << 15)
	43
8730bccf LP	44	/* DNSSEC algorithm identifiers, see
	45	* http://tools.ietf.org/html/rfc4034#appendix-A.1 and
	46	* https://www.iana.org/assignments/dns-sec-alg-numbers/dns-sec-alg-numbers.xhtml */
	47	enum {
	48	DNSSEC_ALGORITHM_RSAMD5 = 1,
	49	DNSSEC_ALGORITHM_DH,
	50	DNSSEC_ALGORITHM_DSA,
	51	DNSSEC_ALGORITHM_ECC,
	52	DNSSEC_ALGORITHM_RSASHA1,
	53	DNSSEC_ALGORITHM_DSA_NSEC3_SHA1,
	54	DNSSEC_ALGORITHM_RSASHA1_NSEC3_SHA1,
6f717d08 LP	55	DNSSEC_ALGORITHM_RSASHA256 = 8, /* RFC 5702 */
	56	DNSSEC_ALGORITHM_RSASHA512 = 10, /* RFC 5702 */
	57	DNSSEC_ALGORITHM_ECC_GOST = 12, /* RFC 5933 */
e0240c64 LP	58	DNSSEC_ALGORITHM_ECDSAP256SHA256 = 13, /* RFC 6605 */
e0240c64 LP	59	DNSSEC_ALGORITHM_ECDSAP384SHA384 = 14, /* RFC 6605 */
8730bccf LP	60	DNSSEC_ALGORITHM_INDIRECT = 252,
	61	DNSSEC_ALGORITHM_PRIVATEDNS,
	62	DNSSEC_ALGORITHM_PRIVATEOID,
	63	_DNSSEC_ALGORITHM_MAX_DEFINED
	64	};
	65
	66	/* DNSSEC digest identifiers, see
	67	* https://www.iana.org/assignments/ds-rr-types/ds-rr-types.xhtml */
	68	enum {
	69	DNSSEC_DIGEST_SHA1 = 1,
6f717d08 LP	70	DNSSEC_DIGEST_SHA256 = 2, /* RFC 4509 */
	71	DNSSEC_DIGEST_GOST_R_34_11_94 = 3, /* RFC 5933 */
	72	DNSSEC_DIGEST_SHA384 = 4, /* RFC 6605 */
8730bccf LP	73	_DNSSEC_DIGEST_MAX_DEFINED
	74	};
	75
d15ad742 LP	76	/* DNSSEC NSEC3 hash algorithms, see
	77	* https://www.iana.org/assignments/dnssec-nsec3-parameters/dnssec-nsec3-parameters.xhtml */
	78	enum {
	79	NSEC3_ALGORITHM_SHA1 = 1,
	80	_NSEC3_ALGORITHM_MAX_DEFINED
	81	};
	82
74b2466e	83	struct DnsResourceKey {
faa133f3 LP	84	unsigned n_ref;
	85	uint16_t class, type;
	86	char _name; / don't access directy, use DNS_RESOURCE_KEY_NAME()! */
74b2466e LP	87	};
74b2466e LP	88
1b4f6e79 LP	89	/* Creates a temporary resource key. This is only useful to quickly
	90	* look up something, without allocating a full DnsResourceKey object
	91	* for it. Note that it is not OK to take references to this kind of
	92	* resource key object. */
	93	#define DNS_RESOURCE_KEY_CONST(c, t, n) \
	94	((DnsResourceKey) { \
	95	.n_ref = (unsigned) -1, \
	96	.class = c, \
	97	.type = t, \
	98	._name = (char*) n, \
	99	})
	100
	101
2001c805 LP	102	struct DnsTxtItem {
	103	size_t length;
	104	LIST_FIELDS(DnsTxtItem, items);
	105	uint8_t data[];
	106	};
	107
74b2466e LP	108	struct DnsResourceRecord {
74b2466e LP	109	unsigned n_ref;
faa133f3	110	DnsResourceKey *key;
7b50eb2e	111	char *to_string;
74b2466e	112	uint32_t ttl;
ee3d6aff	113	usec_t expiry; /* RRSIG signature expiry */
a8812dd7 LP	114	bool unparseable:1;
	115	bool wire_format_canonical:1;
	116	void *wire_format;
	117	size_t wire_format_size;
	118	size_t wire_format_rdata_offset;
74b2466e LP	119	union {
	120	struct {
	121	void *data;
f5430a3e	122	size_t size;
d75acfb0	123	} generic, opt;
74b2466e	124
9c92ce6d LP	125	struct {
	126	uint16_t priority;
	127	uint16_t weight;
	128	uint16_t port;
	129	char *name;
	130	} srv;
74b2466e LP	131
	132	struct {
	133	char *name;
8ac4e9e1	134	} ptr, ns, cname, dname;
74b2466e LP	135
	136	struct {
	137	char *cpu;
	138	char *os;
	139	} hinfo;
	140
2e276efc	141	struct {
2001c805	142	DnsTxtItem *items;
c0eb11cf	143	} txt, spf;
74b2466e LP	144
	145	struct {
	146	struct in_addr in_addr;
	147	} a;
	148
	149	struct {
	150	struct in6_addr in6_addr;
	151	} aaaa;
7e8e0422 LP	152
	153	struct {
	154	char *mname;
	155	char *rname;
	156	uint32_t serial;
	157	uint32_t refresh;
	158	uint32_t retry;
	159	uint32_t expire;
	160	uint32_t minimum;
	161	} soa;
946c7094 ZJS	162
	163	struct {
	164	uint16_t priority;
	165	char *exchange;
	166	} mx;
0dae31d4	167
6af47493	168	/* https://tools.ietf.org/html/rfc1876 */
0dae31d4 ZJS	169	struct {
	170	uint8_t version;
	171	uint8_t size;
	172	uint8_t horiz_pre;
	173	uint8_t vert_pre;
	174	uint32_t latitude;
	175	uint32_t longitude;
	176	uint32_t altitude;
	177	} loc;
42cc2eeb	178
549c1a25	179	/* https://tools.ietf.org/html/rfc4255#section-3.1 */
42cc2eeb LP	180	struct {
	181	uint8_t algorithm;
	182	uint8_t fptype;
549c1a25 TG	183	void *fingerprint;
549c1a25 TG	184	size_t fingerprint_size;
42cc2eeb	185	} sshfp;
8db0d2f5 ZJS	186
	187	/* http://tools.ietf.org/html/rfc4034#section-2.1 */
	188	struct {
f91dc240 LP	189	uint16_t flags;
f91dc240 LP	190	uint8_t protocol;
8db0d2f5 ZJS	191	uint8_t algorithm;
	192	void* key;
	193	size_t key_size;
	194	} dnskey;
151226ab ZJS	195
	196	/* http://tools.ietf.org/html/rfc4034#section-3.1 */
	197	struct {
	198	uint16_t type_covered;
	199	uint8_t algorithm;
	200	uint8_t labels;
	201	uint32_t original_ttl;
	202	uint32_t expiration;
	203	uint32_t inception;
	204	uint16_t key_tag;
	205	char *signer;
	206	void *signature;
	207	size_t signature_size;
	208	} rrsig;
50f1e641	209
9ead3519	210	/* https://tools.ietf.org/html/rfc4034#section-4.1 */
50f1e641 TG	211	struct {
	212	char *next_domain_name;
	213	Bitmap *types;
	214	} nsec;
5d45a880	215
6af47493 LP	216	/* https://tools.ietf.org/html/rfc4034#section-5.1 */
	217	struct {
	218	uint16_t key_tag;
	219	uint8_t algorithm;
	220	uint8_t digest_type;
	221	void *digest;
	222	size_t digest_size;
	223	} ds;
	224
5d45a880 TG	225	struct {
	226	uint8_t algorithm;
	227	uint8_t flags;
	228	uint16_t iterations;
	229	void *salt;
	230	size_t salt_size;
	231	void *next_hashed_name;
	232	size_t next_hashed_name_size;
	233	Bitmap *types;
	234	} nsec3;
74b2466e LP	235	};
	236	};
	237
faa133f3	238	static inline const char* DNS_RESOURCE_KEY_NAME(const DnsResourceKey *key) {
85aeaccc	239	if (!key)
faa133f3 LP	240	return NULL;
	241
	242	if (key->_name)
	243	return key->_name;
	244
	245	return (char*) key + sizeof(DnsResourceKey);
	246	}
74b2466e	247
85aeaccc LP	248	static inline const void* DNS_RESOURCE_RECORD_RDATA(DnsResourceRecord *rr) {
	249	if (!rr)
	250	return NULL;
	251
	252	if (!rr->wire_format)
	253	return NULL;
	254
	255	assert(rr->wire_format_rdata_offset <= rr->wire_format_size);
	256	return (uint8_t*) rr->wire_format + rr->wire_format_rdata_offset;
	257	}
	258
	259	static inline size_t DNS_RESOURCE_RECORD_RDATA_SIZE(DnsResourceRecord *rr) {
	260	if (!rr)
	261	return 0;
	262	if (!rr->wire_format)
	263	return 0;
	264
	265	assert(rr->wire_format_rdata_offset <= rr->wire_format_size);
	266	return rr->wire_format_size - rr->wire_format_rdata_offset;
	267	}
	268
faa133f3	269	DnsResourceKey* dns_resource_key_new(uint16_t class, uint16_t type, const char *name);
36d9205d	270	DnsResourceKey* dns_resource_key_new_redirect(const DnsResourceKey key, const DnsResourceRecord cname);
801ad6a6	271	int dns_resource_key_new_append_suffix(DnsResourceKey *ret, DnsResourceKey key, char *name);
faa133f3 LP	272	DnsResourceKey* dns_resource_key_new_consume(uint16_t class, uint16_t type, char *name);
	273	DnsResourceKey* dns_resource_key_ref(DnsResourceKey *key);
	274	DnsResourceKey* dns_resource_key_unref(DnsResourceKey *key);
28b9b764	275	bool dns_resource_key_is_address(const DnsResourceKey *key);
faa133f3	276	int dns_resource_key_equal(const DnsResourceKey a, const DnsResourceKey b);
105e1512	277	int dns_resource_key_match_rr(const DnsResourceKey key, DnsResourceRecord rr, const char *search_domain);
5d27351f	278	int dns_resource_key_match_cname_or_dname(const DnsResourceKey key, const DnsResourceKey cname, const char *search_domain);
547973de	279	int dns_resource_key_match_soa(const DnsResourceKey key, const DnsResourceKey soa);
2d4c5cbc	280	int dns_resource_key_to_string(const DnsResourceKey key, char *ret);
faa133f3	281	DEFINE_TRIVIAL_CLEANUP_FUNC(DnsResourceKey*, dns_resource_key_unref);
322345fd	282
7778dfff DM	283	static inline bool dns_key_is_shared(const DnsResourceKey *key) {
	284	return IN_SET(key->type, DNS_TYPE_PTR);
	285	}
	286
faa133f3	287	DnsResourceRecord* dns_resource_record_new(DnsResourceKey *key);
8bf52d3d	288	DnsResourceRecord* dns_resource_record_new_full(uint16_t class, uint16_t type, const char *name);
74b2466e LP	289	DnsResourceRecord* dns_resource_record_ref(DnsResourceRecord *rr);
74b2466e LP	290	DnsResourceRecord* dns_resource_record_unref(DnsResourceRecord *rr);
623a4c97	291	int dns_resource_record_new_reverse(DnsResourceRecord *ret, int family, const union in_addr_union address, const char *name);
78c6a153	292	int dns_resource_record_new_address(DnsResourceRecord *ret, int family, const union in_addr_union address, const char *name);
322345fd	293	int dns_resource_record_equal(const DnsResourceRecord a, const DnsResourceRecord b);
7b50eb2e	294	const char* dns_resource_record_to_string(DnsResourceRecord *rr);
faa133f3	295	DEFINE_TRIVIAL_CLEANUP_FUNC(DnsResourceRecord*, dns_resource_record_unref);
322345fd	296
a8812dd7 LP	297	int dns_resource_record_to_wire_format(DnsResourceRecord *rr, bool canonical);
a8812dd7 LP	298
2001c805 LP	299	DnsTxtItem dns_txt_item_free_all(DnsTxtItem i);
	300	bool dns_txt_item_equal(DnsTxtItem a, DnsTxtItem b);
	301
d5099efc	302	extern const struct hash_ops dns_resource_key_hash_ops;
c9c72065	303	extern const struct hash_ops dns_resource_record_hash_ops;
8730bccf	304
8e54f5d9	305	int dnssec_algorithm_to_string_alloc(int i, char **ret);
8730bccf LP	306	int dnssec_algorithm_from_string(const char *s) _pure_;
8730bccf LP	307
8e54f5d9	308	int dnssec_digest_to_string_alloc(int i, char **ret);
8730bccf	309	int dnssec_digest_from_string(const char *s) _pure_;