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); }
public bool SetFields(Byte[] buffer) { if (buffer.Length >= this.HeaderLength_) { int [] x = new int[2]; for (int i = 0; i < Keys_.Count; i++) { x = (int[])FieldLengths_[Keys_[i]]; if (x[1] <= 8) { Fields_.Add(Keys_[i], HeaderParser.ToByte(buffer, x[0], x[1])); } else if (x[1] <= 16) { Fields_.Add(Keys_[i], HeaderParser.ToInt(buffer, x[0], x[1])); } else if (x[1] <= 32) { Fields_.Add(Keys_[i], HeaderParser.ToUInt(buffer, x[0], x[1])); } } this.SetData(buffer, this.HeaderLength_, buffer.Length - this.HeaderLength_); Length_ = buffer.Length; return(true); } return(false); }
public void SetPorts() { if (this.Protocol == 6 || this.Protocol == 17) { SPort = HeaderParser.ToInt(this.Data, 0, 16); DPort = HeaderParser.ToInt(this.Data, 16, 16); } }
public UdpDatagram HandleUdpDatagram() { UdpDatagram packet = new UdpDatagram(); int source_port = HeaderParser.ToInt(this.Data, 0, 16); int dest_port = HeaderParser.ToInt(this.Data, 16, 16); int length = HeaderParser.ToInt(this.Data, 32, 16) - 8; packet.Source = new IPEndPoint(this.Source, source_port); packet.Destination = new IPEndPoint(this.Destination, dest_port); packet.SetData(this.Data, 8, length); return(packet); }
public int GetInnerDataLength() { switch (this.Protocol) { case 1: return(this.Data.Length - 8); case 6: return(this.Data.Length - HeaderParser.ToInt(this.Data, 96, 4) * 4); case 17: return(HeaderParser.ToInt(this.Data, 32, 16) - 8); default: return(0); } }