public void ConnectAsync()
{
if (TCPState == TCPSocketState.Closed || TCPState == TCPSocketState.Listen)
{
if (TCPState == TCPSocketState.Closed)
{
CreateTCB();
}
TCPFrame tcpFrame = new TCPFrame();
tcpFrame.SynchronizeFlagSet = true;
tcpFrame.SequenceNumber = tcb.ISS;
tcpFrame.SourcePort = this.LocalBinding;
tcpFrame.DestinationPort = this.RemoteBinding;
tcpFrame.Window = tcb.RCV_WND;
tcpFrame.EncapsulatedFrame = new RawDataFrame(new byte[0]);
tcpFrame.Checksum = tcpFrame.CalculateChecksum(pseudoHeaderSource.GetPseudoHeader(tcpFrame));
TransmitAssured(tcpFrame);
tcb.SND_UNA = tcb.ISS;
tcb.SND_NXT = (tcb.ISS + 1) % uint.MaxValue;
this.TCPState = TCPSocketState.SynSent;
}
else
{
throw new InvalidOperationException("Cannot call Connect() on a socket which is being used.");
}
}
