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/*
* This file is part of PowerDNS or dnsdist.
* Copyright -- PowerDNS.COM B.V. and its contributors
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* In addition, for the avoidance of any doubt, permission is granted to
* link this program with OpenSSL and to (re)distribute the binaries
* produced as the result of such linking.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#pragma once
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "namespaces.hh"
/** The QType class is meant to deal easily with the different kind of resource types, like 'A', 'NS',
* 'CNAME' etcetera. These types have both a name and a number. This class can seamlessly move between
* them. Use it like this:
\code
QType t;
t="CNAME";
cout<<t.getCode()<<endl; // prints '5'
t=6;
cout<<t.toString()<<endl; // prints 'SOA'
\endcode
*/
class QType
{
public:
QType(uint16_t qtype = 0) : code(qtype) {}
QType &operator=(const char *);
QType &operator=(const string &);
operator uint16_t() const {
return code;
}
const string toString() const;
uint16_t getCode() const
{
return code;
}
/**
* \brief Return whether we know the name of this type.
*
* This does not presume that we have an implemented a content representation for this type,
* for that please see DNSRecordContent::isRegisteredType().
*/
bool isSupportedType() const;
/**
* \brief Whether the type is either a QTYPE or Meta-Type as defined by rfc6895 section 3.1.
*
* Note that ANY is 255 and falls outside the range.
*/
bool isMetadataType() const;
static uint16_t chartocode(const char* p);
enum typeenum : uint16_t {
ENT = 0,
A = 1,
NS = 2,
CNAME = 5,
SOA = 6,
MB = 7,
MG = 8,
MR = 9,
PTR = 12,
HINFO = 13,
MINFO = 14,
MX = 15,
TXT = 16,
RP = 17,
AFSDB = 18,
SIG = 24,
KEY = 25,
AAAA = 28,
LOC = 29,
SRV = 33,
NAPTR = 35,
KX = 36,
CERT = 37,
A6 = 38,
DNAME = 39,
OPT = 41,
APL = 42,
DS = 43,
SSHFP = 44,
IPSECKEY = 45,
RRSIG = 46,
NSEC = 47,
DNSKEY = 48,
DHCID = 49,
NSEC3 = 50,
NSEC3PARAM = 51,
TLSA = 52,
SMIMEA = 53,
RKEY = 57,
CDS = 59,
CDNSKEY = 60,
OPENPGPKEY = 61,
CSYNC = 62,
ZONEMD = 63,
SVCB = 64,
HTTPS = 65,
SPF = 99,
NID = 104,
L32 = 105,
L64 = 106,
LP = 107,
EUI48 = 108,
EUI64 = 109,
TKEY = 249,
TSIG = 250,
IXFR = 251,
AXFR = 252,
MAILB = 253,
MAILA = 254,
ANY = 255,
URI = 256,
CAA = 257,
DLV = 32769,
ADDR = 65400,
#if !defined(RECURSOR)
ALIAS = 65401,
LUA = 65402
#endif
};
const static uint16_t rfc6895MetaLowerBound = 128;
const static uint16_t rfc6895MetaUpperBound = 254; // Note 255: ANY is not included
const static uint16_t rfc6895Reserved = 65535;
const static map<const string, uint16_t> names;
const static map<uint16_t, const string> numbers;
private:
uint16_t code;
};
// Define hash function on QType. See https://en.cppreference.com/w/cpp/utility/hash
namespace std {
template<> struct hash<QType> {
std::size_t operator()(QType qtype) const noexcept {
return std::hash<uint16_t>{}(qtype.getCode());
}
};
}
inline std::ostream& operator<<(std::ostream& stream, const QType& qtype)
{
return stream << qtype.toString();
}
// Used by e.g. boost multi-index
inline size_t hash_value(const QType qtype) {
return qtype.getCode();
}
struct QClass
{
constexpr QClass(uint16_t code = 0) : qclass(code) {}
constexpr operator uint16_t() const {
return qclass;
}
constexpr uint16_t getCode() const
{
return qclass;
}
const std::string toString() const;
static const QClass IN;
static const QClass CHAOS;
static const QClass NONE;
static const QClass ANY;
private:
uint16_t qclass;
};
constexpr QClass QClass::IN(1);
constexpr QClass QClass::CHAOS(3);
constexpr QClass QClass::NONE(254);
constexpr QClass QClass::ANY(255);
inline std::ostream& operator<<(std::ostream& s, QClass qclass)
{
return s << qclass.toString();
}
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