public PacketInfo(PacketIP ip, PacketTcp tcp, string hex, string ascii)
{
_ip = ip;
_tcp = tcp;
packetHex = hex;
packetAscii = ascii;
}
private void ParseData(byte[] data, int numReceived)
{
string packetHex;
string packetAscii;
if (data.Length > 0 && numReceived != 0)
{
//Parse the IP packet
PacketIP ipPacket = new PacketIP(data, numReceived);
if (ipPacket.Protocol == "TCP")
{
//Make the key of the packet equal to the number of packets that have been received thus far
string strKey = (numPacketsReceived + 1).ToString();
//Parse the TCP packet
PacketTcp tcpPacket = new PacketTcp(ipPacket.Data, ipPacket.MessageLength);
//Convert the packet's bytes to Hex and ASCII
packetHex = BitConverter.ToString(byteData).Replace("-", String.Empty).Substring(0, numReceived * 2);
packetAscii = Encoding.ASCII.GetString(byteData).Substring(0, numReceived);
//Create a PacketInfo object to store in the dictionary
PacketInfo pkgInfo = new PacketInfo(ipPacket, tcpPacket, packetHex, packetAscii);
//Create a PacketData object to populate the datagrid
PacketData packet = new PacketData
{
Number = (numPacketsReceived + 1).ToString(),
Time_Stamp = DateTime.Now.ToString("HH:mm:ss:") + DateTime.Now.Millisecond.ToString(),
Source = ipPacket.SourceAddress.ToString() + ":" + tcpPacket.SourcePort,
Destination = ipPacket.DestinationAddress.ToString() + ":" + tcpPacket.DestinationPort,
Protocol = ipPacket.Protocol,
Length = ipPacket.TotalLength,
Info = tcpPacket.Flags
};
//If the buffer is not full, add the packet to the buffer and display it in the datagrid
if (pkgBuffer.Count < maxBufferSize)
{
pkgBuffer.Add(strKey, pkgInfo);
numPacketsReceived++;
Dispatcher.Invoke((() =>
{
dataGrid.Items.Add(packet);
bufferProgress.Value = (double)numPacketsReceived;
percentLabel.Content = (Math.Round(((double)numPacketsReceived / (double)maxBufferSize), 2) * 100).ToString() + "%";
}), DispatcherPriority.ContextIdle);
}
else
{
//Stop capturing packets because the buffer is full
MessageBox.Show("The packet buffer has reached its maximum capacity. Clear the buffer or increase the maximum buffer size in order to continue.",
"Packet Sniffer", MessageBoxButton.OK, MessageBoxImage.Warning);
Dispatcher.Invoke((() =>
{
Stop_Capturing();
}), DispatcherPriority.ContextIdle);
}
}
}
}
