dnsdist: Refactoring to merge the UDP and TCP paths

[thirdparty/pdns.git] / pdns / qtype.cc

/*
 * 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!");

vector<QType::namenum> QType::names;
// XXX FIXME we need to do something with initializer order here!
QType::init QType::initializer; 

QType::QType()
{
  code = 0;
}

bool QType::isSupportedType() {
  for(vector<namenum>::iterator pos=names.begin();pos<names.end();++pos)
    if(pos->second==code)
      return true;
  return false;
}

bool QType::isMetadataType() {
  if (code == QType::AXFR ||
      code == QType::MAILA ||
      code == QType::MAILB ||
      code == QType::TSIG ||
      code == QType::IXFR)
    return true;

  return false;
}

uint16_t QType::getCode() const
{
  return code;
}

const string QType::getName() const
{
  vector<namenum>::iterator pos;
  for(pos=names.begin();pos<names.end();++pos)
    if(pos->second==code)
      return pos->first;

  return "TYPE"+itoa(code);
}

QType &QType::operator=(uint16_t n)
{
  code=n;
  return *this;
}

int QType::chartocode(const char *p)
{
  string P = toUpper(p);
  vector<namenum>::iterator pos;

  for(pos=names.begin(); pos < names.end(); ++pos)
    if(pos->first == P)
      return pos->second;

  if(*p=='#') {
    return atoi(p+1);
  }

  if(boost::starts_with(P, "TYPE"))
    return 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;
}


QType::QType(uint16_t n): QType()
{
  code=n;
}