/*

 * 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 "packetcache.hh"

#include "statbag.hh"

StatBag S;

extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size);

extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)

{

  if (size > std::numeric_limits<uint16_t>::max() || size < sizeof(dnsheader)) {

    return 0;

  }

  std::string input(reinterpret_cast<const char*>(data), size);

  /* auth's version */

  try {

    static const std::unordered_set<uint16_t> optionsToIgnore{EDNSOptionCode::COOKIE};

    PacketCache::canHashPacket(input, optionsToIgnore);

    DNSName qname(input.data(), input.size(), sizeof(dnsheader), false);

    PacketCache::queryMatches(input, input, qname, optionsToIgnore);

  }

  catch (const std::exception& e) {

  }

  catch (const PDNSException& e) {

  }

  /* recursor's version */

  try {

    static const std::unordered_set<uint16_t> optionsToIgnore{EDNSOptionCode::COOKIE, EDNSOptionCode::ECS};

    PacketCache::canHashPacket(input, optionsToIgnore);

    DNSName qname(input.data(), input.size(), sizeof(dnsheader), false);

    PacketCache::queryMatches(input, input, qname, optionsToIgnore);

  }

  catch (const std::exception& e) {

  }

  catch (const PDNSException& e) {

  }

  return 0;

}