public TcpPacket HandleTcpPacket()
{
TcpPacket packet = new TcpPacket();
int source_port = HeaderParser.ToInt(this.Data, 0, 16);
int dest_port = HeaderParser.ToInt(this.Data, 16, 16);
int offset = HeaderParser.ToInt(this.Data, 96, 4) * 4;
packet.Source = new IPEndPoint(this.Source, source_port);
packet.Destination = new IPEndPoint(this.Destination, dest_port);
packet.Sequence = HeaderParser.ToUInt(this.Data, 32, 32);
packet.Acknowledgement = HeaderParser.ToUInt(this.Data, 64, 32);
packet.DataOffset = offset;
packet.Urgent = HeaderParser.ToByte(this.Data, 106, 1) != 0;
packet.Ack = HeaderParser.ToByte(this.Data, 107, 1) != 0;
packet.Push = HeaderParser.ToByte(this.Data, 108, 1) != 0;
packet.Reset = HeaderParser.ToByte(this.Data, 109, 1) != 0;
packet.Syn = HeaderParser.ToByte(this.Data, 110, 1) != 0;
packet.Fin = HeaderParser.ToByte(this.Data, 111, 1) != 0;
packet.WindowSize = HeaderParser.ToInt(this.Data, 112, 16);
packet.Checksum = HeaderParser.ToInt(this.Data, 128, 16);
packet.UrgentPointer = HeaderParser.ToInt(this.Data, 144, 16);
if (offset > 20)
{
packet.SetData(this.Data, 20, offset - 20);
}
packet.SetData(this.Data, offset, this.Data.Length - offset);
return(packet);
}
private void HandleTcpPacket(byte[] data, IPAddress source, IPAddress destination)
{
TcpPacket packet = new TcpPacket();
int port = Sniffer.HeaderParser.ToInt(data, 0, 0x10);
int num2 = Sniffer.HeaderParser.ToInt(data, 0x10, 0x10);
int offset = Sniffer.HeaderParser.ToInt(data, 0x60, 4) * 4;
packet.Source = new IPEndPoint(source, port);
packet.Destination = new IPEndPoint(destination, num2);
packet.Sequence = Sniffer.HeaderParser.ToUInt(data, 0x20, 0x20);
packet.Acknowledgement = Sniffer.HeaderParser.ToUInt(data, 0x40, 0x20);
packet.Urgent = Sniffer.HeaderParser.ToByte(data, 0x6a, 1) != 0;
packet.Ack = Sniffer.HeaderParser.ToByte(data, 0x6b, 1) != 0;
packet.Push = Sniffer.HeaderParser.ToByte(data, 0x6c, 1) != 0;
packet.Reset = Sniffer.HeaderParser.ToByte(data, 0x6d, 1) != 0;
packet.Syn = Sniffer.HeaderParser.ToByte(data, 110, 1) != 0;
packet.Fin = Sniffer.HeaderParser.ToByte(data, 0x6f, 1) != 0;
packet.SetData(data, offset, data.Length - offset);
this.FireTcpPacketReceived(packet);
}
