Разбор TCP пакета - C#

        static void Main(string[] args)
        {
            // Retrieve the device list from the local machine
            IList<LivePacketDevice> allDevices = LivePacketDevice.AllLocalMachine;
 
            if (allDevices.Count == 0)
            {
                Console.WriteLine("No interfaces found! Make sure WinPcap is installed.");
                return;
            }
 
            // Print the list
            for (int i = 0; i != allDevices.Count; ++i)
            {
                LivePacketDevice device = allDevices[i];
                Console.Write(String.Format("{0}. {1}", (i + 1), device.Name));
                if (device.Description != null)
                    Console.WriteLine(String.Format(" ({0})", device.Description));
                else
                    Console.WriteLine(" (No description available)");
            }
 
            int deviceIndex = 0;
            do
            {
                Console.WriteLine(String.Format("Enter the interface number (1-{0}):", allDevices.Count));
                string deviceIndexString = Console.ReadLine();
                if (!int.TryParse(deviceIndexString, out deviceIndex) ||
                    deviceIndex < 1 || deviceIndex > allDevices.Count)
                {
                    deviceIndex = 0;
                }
            } while (deviceIndex == 0);
 
            // Take the selected adapter
            PacketDevice selectedDevice = allDevices[deviceIndex - 1];
 
            // Open the output device
            using (PacketCommunicator communicator = selectedDevice.Open())
            {
                communicator.SendPacket(BuildTcpPacket());
            }
            Console.ReadKey();
        }
 
        private static Packet BuildTcpPacket()
        {
            EthernetLayer ethernetLayer =
                new EthernetLayer
                {
                    Source = new MacAddress("00:25:22:50:ef:74"),
                    Destination = new MacAddress("02:02:02:02:02:02"),
                    EtherType = EthernetType.None, // Will be filled automatically.
                };
 
            IpV4Layer ipV4Layer =
                new IpV4Layer
                {
                    Source = new IpV4Address("192.168.1.203"), // <- this is my LAN IP ADDRESS IS TRUE??
                    CurrentDestination = new IpV4Address("192.168.1.35"), // <-- THIS IS MY SERVER IPADDESS??
                    Fragmentation = IpV4Fragmentation.None,
                    HeaderChecksum = null, // Will be filled automatically.
                    Identification = 64,
                    Options = IpV4Options.None,
                    Protocol = null, // Will be filled automatically.
                    Ttl = 64,
                    TypeOfService = 0,
                };
 
            TcpLayer tcpLayer =
                new TcpLayer
                {
                    SourcePort = 9509,
                    DestinationPort = 80,
                    Checksum = null, // Will be filled automatically.
                    SequenceNumber = 100,
                    AcknowledgmentNumber = 50,
                    ControlBits = TcpControlBits.Acknowledgment,
                    Window = 100,
                    UrgentPointer = 0,
                    Options = TcpOptions.None,
                };
 
            PayloadLayer payloadLayer =
                new PayloadLayer
                {
                    Data = new Datagram(Encoding.ASCII.GetBytes("hello world")),
                };
 
            PacketBuilder builder = new PacketBuilder(ethernetLayer, ipV4Layer, tcpLayer);
 
            return builder.Build(DateTime.Now);
        }