Exemplo n.º 1
0
        /// <summary>
        /// Create new instance of the <see cref="TcpListener"/> class.
        /// </summary>
        /// <param name="localPort">Local port.</param>
        /// <exception cref="ArgumentOutOfRangeException">Thrown on fatal error (contact support).</exception>
        /// <exception cref="ArgumentException">Thrown if localPort already exists.</exception>
        public TcpListener(int localPort)
        {
            StateMachine = new Tcp();

            StateMachine.rxBuffer = new Queue <TCPPacket>(8);

            StateMachine.localPort = localPort;

            if (localPort > 0)
            {
                listeners.Add((uint)localPort, this);
            }
        }
Exemplo n.º 2
0
        /// <summary>
        /// Stop listening for new TCP connections.
        /// </summary>
        /// <exception cref="OverflowException">Thrown on fatal error (contact support).</exception>
        /// <exception cref="Sys.IO.IOException">Thrown on IO error.</exception>
        /// <exception cref="Exception">Thrown if TcpListener not started.</exception>
        public void Stop()
        {
            if (StateMachine == null)
            {
                new Exception("TcpListener is not started.");
            }

            if (StateMachine.Status == Status.LISTEN)
            {
                Tcp.RemoveConnection(StateMachine.LocalEndPoint.Port, StateMachine.RemoteEndPoint.Port, StateMachine.LocalEndPoint.Address, StateMachine.RemoteEndPoint.Address);

                StateMachine = null;
            }
        }
Exemplo n.º 3
0
        /// <summary>
        /// Create new instance of the <see cref="TcpClient"/> class.
        /// </summary>
        /// <param name="localPort">Local port.</param>
        /// <exception cref="ArgumentOutOfRangeException">Thrown on fatal error (contact support).</exception>
        /// <exception cref="ArgumentException">Thrown if localPort already exists.</exception>
        public TcpClient(int localPort)
        {
            StateMachine = new Tcp();

            StateMachine.rxBuffer = new Queue <TCPPacket>(8);

            StateMachine.Status             = Status.CLOSED;
            StateMachine.LastSequenceNumber = 0;

            StateMachine.localPort = localPort;
            if (localPort > 0)
            {
                clients.Add((uint)localPort, this);
            }
        }
Exemplo n.º 4
0
        /// <summary>
        /// Close connection.
        /// </summary>
        /// <exception cref="ArgumentOutOfRangeException">Thrown on fatal error (contact support).</exception>
        /// <exception cref="Exception">Thrown if TCP Status is CLOSED.</exception>
        public void Close()
        {
            if (StateMachine.Status == Status.ESTABLISHED)
            {
                StateMachine.SendEmptyPacket(Flags.FIN | Flags.ACK);

                StateMachine.TCB.SndNxt++;

                StateMachine.Status = Status.FIN_WAIT1;

                if (StateMachine.WaitStatus(Status.CLOSED, 5000) == false)
                {
                    throw new Exception("Failed to close TCP connection!");
                }
            }

            Tcp.RemoveConnection(StateMachine.LocalEndPoint.Port, StateMachine.RemoteEndPoint.Port, StateMachine.LocalEndPoint.Address, StateMachine.RemoteEndPoint.Address);
        }
Exemplo n.º 5
0
        /// <summary>
        /// TCP handler.
        /// </summary>
        /// <param name="packetData">Packet data.</param>
        /// <exception cref="sys.ArgumentOutOfRangeException">Thrown on fatal error (contact support).</exception>
        /// <exception cref="sys.IO.IOException">Thrown on IO error.</exception>
        /// <exception cref="sys.ArgumentException">Thrown on fatal error (contact support).</exception>
        /// <exception cref="sys.OverflowException">Thrown if packetData array length is greater than Int32.MaxValue.</exception>
        internal static void TCPHandler(byte[] packetData)
        {
            var packet = new TCPPacket(packetData);

            if (packet.CheckCRC())
            {
                var connection = Tcp.GetConnection(packet.DestinationPort, packet.SourcePort, packet.DestinationIP, packet.SourceIP);

                if (connection != null)
                {
                    connection.ReceiveData(packet);
                }
            }
            else
            {
                Global.mDebugger.Send("Checksum incorrect! Packet passed.");
            }
        }
Exemplo n.º 6
0
 /// <summary>
 /// Create new instance of the <see cref="TcpClient"/> class.
 /// </summary>
 /// <param name="stateMachine">Tcp state machine.</param>
 /// <exception cref="ArgumentOutOfRangeException">Thrown on fatal error (contact support).</exception>
 /// <exception cref="ArgumentException">Thrown if localPort already exists.</exception>
 internal TcpClient(Tcp stateMachine)
 {
     StateMachine = stateMachine;
 }