#include <functional>

#include <Packet.h>

#include <PcapFileDevice.h>

#include "Logger.h"

#include "DumpToFile.h"

static std::string tmpName;

static std::string tmpFile;

static std::string outPcapFile;

static int writes = 0;

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

{

  if (tmpName.empty())

    tmpName = tmpnam(nullptr);

  if (tmpFile.empty())

    tmpFile = tmpName + FILE_EXT;

  if (dumpDataToPcapFile(data, size, tmpFile.c_str()) != 0)

  {

    std::cerr << "Can't Dump buffer to the '" << tmpFile << "' file!!!!\n";

    return -1;

  }

  pcpp::Logger::getInstance().suppressLogs();

  std::unique_ptr<pcpp::IFileReaderDevice> reader(pcpp::IFileReaderDevice::getReader(tmpFile));

  if (!reader->open())

  {

    std::cerr << "Error opening the '" << tmpFile << "' file\n";

    return -1;

  }

  if (outPcapFile.empty())

#ifdef NG_WRITER

    outPcapFile = tmpName + ".pcapng";

#else

    outPcapFile = tmpName + ".pcap";

#endif

#ifdef NG_WRITER

  pcpp::PcapNgFileWriterDevice pcapWriter(outPcapFile);

#else

  pcpp::PcapFileWriterDevice pcapWriter(outPcapFile, pcpp::LINKTYPE_ETHERNET);

#endif

  if (writes++ == 10)

  {

    writes = 1;

    remove(outPcapFile.c_str());

  }

  if (!pcapWriter.open(writes != 1))

  {

    std::cerr << "Cannot open '" << outPcapFile << "' for writing" << std::endl;

    return -1;

  }

  pcpp::RawPacketVector packets;

  if (reader->getNextPackets(packets, 1) != 1)

  {

    std::cerr << "Couldn't read the first packet in the file\n";

    return 0;

  }

  pcpp::RawPacket& rawPacket = *packets.front();

  do

  {

    pcapWriter.writePacket(rawPacket);

  } while (reader->getNextPacket(rawPacket));

  pcpp::PcapStats stats;

  pcapWriter.getStatistics(stats);

  std::cout << "Written " << stats.packetsRecv << " packets successfully to pcap writer and " << stats.packetsDrop

            << " packets could not be written" << std::endl;

  pcapWriter.close();

  return 0;

}