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Systemd/src/resolve/resolved-dns-rr.h
Zbigniew Jędrzejewski-Szmek ca78ad1de9 headers: remove unneeded includes from util.h 
This means we need to include many more headers in various files that simply
included util.h before, but it seems cleaner to do it this way.
2019-03-27 11:53:12 +01:00

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/* SPDX-License-Identifier: LGPL-2.1+ */
#pragma once
#include <netinet/in.h>
#include "bitmap.h"
#include "dns-type.h"
#include "hashmap.h"
#include "in-addr-util.h"
#include "list.h"
#include "string-util.h"
#include "time-util.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_ED25519 = 15, /* RFC 8080 */
DNSSEC_ALGORITHM_ED448 = 16, /* RFC 8080 */
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; /* (unsigned -1) for const keys, see below */
uint16_t class, type;
char *_name; /* don't access directly, 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 */
/* How many labels to strip to determine "signer" of the RRSIG (aka, the zone). -1 if not signed. */
unsigned n_skip_labels_signer;
/* How many labels to strip to determine "synthesizing source" of this RR, i.e. the wildcard's immediate parent. -1 if not signed. */
unsigned n_skip_labels_source;
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 data_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;
/* https://tools.ietf.org/html/draft-ietf-dane-protocol-23 */
struct {
uint8_t cert_usage;
uint8_t selector;
uint8_t matching_type;
void *data;
size_t data_size;
} tlsa;
/* https://tools.ietf.org/html/rfc6844 */
struct {
uint8_t flags;
char *tag;
void *value;
size_t value_size;
} caa;
};
};
static inline const void* DNS_RESOURCE_RECORD_RDATA(const 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(const 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;
}
static inline uint8_t DNS_RESOURCE_RECORD_OPT_VERSION_SUPPORTED(const DnsResourceRecord *rr) {
assert(rr);
assert(rr->key->type == DNS_TYPE_OPT);
return ((rr->ttl >> 16) & 0xFF) == 0;
}
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);
const char* dns_resource_key_name(const DnsResourceKey *key);
bool dns_resource_key_is_address(const DnsResourceKey *key);
bool dns_resource_key_is_dnssd_ptr(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);
/* _DNS_{CLASS,TYPE}_STRING_MAX include one byte for NUL, which we use for space instead below.
* DNS_HOSTNAME_MAX does not include the NUL byte, so we need to add 1. */
#define DNS_RESOURCE_KEY_STRING_MAX (_DNS_CLASS_STRING_MAX + _DNS_TYPE_STRING_MAX + DNS_HOSTNAME_MAX + 1)
char* dns_resource_key_to_string(const DnsResourceKey *key, char *buf, size_t buf_size);
ssize_t dns_resource_record_payload(DnsResourceRecord *rr, void **out);
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);
}
bool dns_resource_key_reduce(DnsResourceKey **a, DnsResourceKey **b);
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);
int dns_resource_record_payload_equal(const DnsResourceRecord *a, const DnsResourceRecord *b);
const char* dns_resource_record_to_string(DnsResourceRecord *rr);
DnsResourceRecord *dns_resource_record_copy(DnsResourceRecord *rr);
DEFINE_TRIVIAL_CLEANUP_FUNC(DnsResourceRecord*, dns_resource_record_unref);
int dns_resource_record_to_wire_format(DnsResourceRecord *rr, bool canonical);
int dns_resource_record_signer(DnsResourceRecord *rr, const char **ret);
int dns_resource_record_source(DnsResourceRecord *rr, const char **ret);
int dns_resource_record_is_signer(DnsResourceRecord *rr, const char *zone);
int dns_resource_record_is_synthetic(DnsResourceRecord *rr);
int dns_resource_record_clamp_ttl(DnsResourceRecord **rr, uint32_t max_ttl);
DnsTxtItem *dns_txt_item_free_all(DnsTxtItem *i);
bool dns_txt_item_equal(DnsTxtItem *a, DnsTxtItem *b);
DnsTxtItem *dns_txt_item_copy(DnsTxtItem *i);
int dns_txt_item_new_empty(DnsTxtItem **ret);
void dns_resource_record_hash_func(const DnsResourceRecord *i, struct siphash *state);
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_;
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