/// <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);
}
}
/// <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;
}
}
/// <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);
}
}
/// <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);
}
/// <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.");
}
}
/// <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;
}