/*

 * 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 "dnsdist-cache.hh"

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()) {

    return 0;

  }

  /* dnsdist's version */

  // By default, cookies are not hashed

  DNSDistPacketCache::CacheSettings skipCookieSettings{

    .d_maxEntries = 10000,

    .d_parseECS = true,

  };

  DNSDistPacketCache pcSkipCookies(skipCookieSettings);

  // Do not skip cookies

  DNSDistPacketCache::CacheSettings parseCookieSettings{

    .d_optionsToSkip = {},

    .d_maxEntries = 10000,

    .d_parseECS = true,

  };

  DNSDistPacketCache pcHashCookies(parseCookieSettings);

  try {

    uint16_t qtype;

    uint16_t qclass;

    unsigned int consumed;

    PacketBuffer vect(data, data + size);

    const DNSName qname(reinterpret_cast<const char*>(data), size, sizeof(dnsheader), false, &qtype, &qclass, &consumed);

    pcSkipCookies.getKey(qname.getStorage(), consumed, vect, false);

    pcHashCookies.getKey(qname.getStorage(), consumed, vect, false);

    boost::optional<Netmask> subnet;

    DNSDistPacketCache::getClientSubnet(vect, consumed, subnet);

  }

  catch (const std::exception& e) {

  }

  catch (const PDNSException& e) {

  }

  return 0;

}