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/*-*- 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 <inttypes.h>
#include <netinet/in.h>
#include "util.h"
#include "hashmap.h"
#include "in-addr-util.h"
typedef struct DnsResourceKey DnsResourceKey;
typedef struct DnsResourceRecord DnsResourceRecord;
/* DNS record classes, see RFC 1035 */
enum {
DNS_CLASS_IN = 0x01,
DNS_CLASS_ANY = 0xFF,
_DNS_CLASS_MAX,
_DNS_CLASS_INVALID = -1
};
/* DNS record types, see RFC 1035 */
enum {
/* Normal records */
DNS_TYPE_A = 0x01,
DNS_TYPE_NS = 0x02,
DNS_TYPE_CNAME = 0x05,
DNS_TYPE_SOA = 0x06,
DNS_TYPE_PTR = 0x0C,
DNS_TYPE_HINFO = 0x0D,
DNS_TYPE_MX = 0x0F,
DNS_TYPE_TXT = 0x10,
DNS_TYPE_AAAA = 0x1C,
DNS_TYPE_SRV = 0x21,
DNS_TYPE_DNAME = 0x27,
DNS_TYPE_SSHFP = 0x2C,
/* Special records */
DNS_TYPE_ANY = 0xFF,
DNS_TYPE_OPT = 0x29, /* EDNS0 option */
DNS_TYPE_TKEY = 0xF9,
DNS_TYPE_TSIG = 0xFA,
DNS_TYPE_IXFR = 0xFB,
DNS_TYPE_AXFR = 0xFC,
_DNS_TYPE_MAX,
_DNS_TYPE_INVALID = -1
};
struct DnsResourceKey {
unsigned n_ref;
uint16_t class, type;
char *_name; /* don't access directy, use DNS_RESOURCE_KEY_NAME()! */
};
struct DnsResourceRecord {
unsigned n_ref;
DnsResourceKey *key;
uint32_t ttl;
union {
struct {
void *data;
uint16_t size;
} generic;
/* struct { */
/* uint16_t priority; */
/* uint16_t weight; */
/* uint16_t port; */
/* char *name; */
/* } srv; */
struct {
char *name;
} ptr, ns, cname;
struct {
char *cpu;
char *os;
} hinfo;
struct {
char **strings;
} txt;
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;
};
};
static inline const char* DNS_RESOURCE_KEY_NAME(const DnsResourceKey *key) {
if (_unlikely_(!key))
return NULL;
if (key->_name)
return key->_name;
return (char*) key + sizeof(DnsResourceKey);
}
DnsResourceKey* dns_resource_key_new(uint16_t class, uint16_t type, const 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);
int dns_resource_key_equal(const DnsResourceKey *a, const DnsResourceKey *b);
int dns_resource_key_match_rr(const DnsResourceKey *key, const DnsResourceRecord *rr);
int dns_resource_key_match_cname(const DnsResourceKey *key, const DnsResourceRecord *rr);
unsigned long dns_resource_key_hash_func(const void *i, const uint8_t hash_key[HASH_KEY_SIZE]);
int dns_resource_key_compare_func(const void *a, const void *b);
int dns_resource_key_to_string(const DnsResourceKey *key, char **ret);
DEFINE_TRIVIAL_CLEANUP_FUNC(DnsResourceKey*, dns_resource_key_unref);
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_equal(const DnsResourceRecord *a, const DnsResourceRecord *b);
int dns_resource_record_to_string(const DnsResourceRecord *rr, char **ret);
DEFINE_TRIVIAL_CLEANUP_FUNC(DnsResourceRecord*, dns_resource_record_unref);
const char *dns_type_to_string(uint16_t type);
int dns_type_from_string(const char *name, uint16_t *type);
const char *dns_class_to_string(uint16_t type);
int dns_class_from_string(const char *name, uint16_t *class);
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