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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.
*/
#include "dns.hh"
#include <iostream>
#include <string>
#include <vector>
#include <utility>
#include <sstream>
#include "qtype.hh"
#include "misc.hh"
static_assert(sizeof(QType) == 2, "QType is not 2 bytes in size, something is wrong!");
const map<const string, uint16_t> QType::names = {
{"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
};
static map<uint16_t, const string> swapElements(const map<const string, uint16_t>& names) {
map<uint16_t, const string> ret;
for (const auto& n : names) {
ret.emplace(n.second, n.first);
}
return ret;
}
const map<uint16_t, const string> QType::numbers = swapElements(names);
bool QType::isSupportedType() const
{
return numbers.count(code) == 1;
}
bool QType::isMetadataType() const
{
// rfc6895 section 3.1, note ANY is 255 and falls outside the range
if (code == QType::OPT || (code >= rfc6895MetaLowerBound && code <= rfc6895MetaUpperBound)) {
return true;
}
return false;
}
const string QType::toString() const
{
const auto& name = numbers.find(code);
if (name != numbers.cend()) {
return name->second;
}
return "TYPE" + std::to_string(code);
}
uint16_t QType::chartocode(const char *p)
{
string P = toUpper(p);
const auto& num = names.find(P);
if (num != names.cend()) {
return num->second;
}
if (*p == '#') {
return static_cast<uint16_t>(atoi(p + 1));
}
if (boost::starts_with(P, "TYPE")) {
return static_cast<uint16_t>(atoi(p + 4));
}
return 0;
}
QType &QType::operator=(const char *p)
{
code = chartocode(p);
return *this;
}
QType &QType::operator=(const string &s)
{
code = chartocode(s.c_str());
return *this;
}
const std::string QClass::toString() const
{
switch (qclass) {
case IN:
return "IN";
case CHAOS:
return "CHAOS";
case NONE:
return "NONE";
case ANY:
return "ANY";
default :
return "CLASS" + std::to_string(qclass);
}
}
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