private void _ThreadProc()
{
while (false == _requestStop)
{
bool _sleep = false;
// Get packet from packet queue
lock (_sync)
{
// If there is no packets
if (_capturedPackets.Count <= 0)
{
_sleep = true;
}
}
// If there is no packet captured
if (true == _sleep)
{
Thread.Sleep(100);
continue;
}
// At this time, we have packets captured
// We have to handle this packet;
List<RawCapture> curPacket = null;
lock(_sync)
{
curPacket = _capturedPackets;
_capturedPackets = new List<RawCapture>();
}
foreach(RawCapture r in curPacket)
{
// 1. Parse packet
OPacket packet = new OPacket();
if (false == _ParsePacket(r, packet))
{
continue;
}
// 2. Save packet to database
lock (_sync)
{
_db.SavePacket(packet, r.Data);
}
int nNextNo = lstPackets.Items.Count + 1;
ListViewItem item = new ListViewItem(nNextNo.ToString());
item.SubItems.Add(packet.GetTimeCollected().ToString());
item.SubItems.Add(packet.GetSourceIP());
item.SubItems.Add(packet.GetDestinationIP());
item.SubItems.Add(ProtocolInfo.instanceOf().ConvertToString(packet.GetProtocol()));
item.SubItems.Add(r.Data.Length.ToString());
// We need to show captured packet in the UI
// but, this code is running in different thread from the UI thread
// So, we have to use BeginInvoke to transfer request to UI thread
this.Invoke(new Action(delegate ()
{
lstPackets.Items.Add(item);
}
));
// Add OPacket object in the list
_curPacketList.AddPacket(packet);
}
curPacket.Clear();
}
}
public void SavePacket(OPacket packet, byte[] rawData)
{
if (null == _dbConnection)
{
return;
}
// Save packet data into the file system
string _path = OArchive.GetArchiveFolder();
_path += "\\";
_path += _GetTempName();
// Save packet data
if (false == _SavePacketAsFile(_path, rawData))
{
return;
}
packet.SetPacketStoredPath(_path);
// Save into the Database
string sql = "INSERT INTO packets (collected_time, src_ip, dest_ip, dest_port, length, packet_path) values ";
string sqlValue = "(";
sqlValue += packet.GetTimeCollected();
sqlValue += ", ";
sqlValue += "\"";
sqlValue += packet.GetSourceIP();
sqlValue += "\"";
sqlValue += ", ";
sqlValue += "\"";
sqlValue += packet.GetDestinationIP();
sqlValue += "\"";
sqlValue += ", ";
sqlValue += Convert.ToString(packet.GetProtocol());
sqlValue += ", ";
sqlValue += "\"";
sqlValue += Convert.ToString(packet.GetLength());
sqlValue += "\"";
sqlValue += ", ";
sqlValue += "\"";
sqlValue += packet.GetPacketStoredPath();
sqlValue += "\"";
sqlValue += ")";
sql += sqlValue;
SQLiteCommand command = new SQLiteCommand(sql, _dbConnection);
command.ExecuteNonQuery();
}