private void HandleTcpClientAccepted(IAsyncResult ar)
{
if (IsRunning)
{
TcpListener tcpListener = (TcpListener)ar.AsyncState;
TcpClient tcpClient = tcpListener.EndAcceptTcpClient(ar);
byte[] buffer = new byte[tcpClient.ReceiveBufferSize];
TcpClientState internalClient = new TcpClientState(tcpClient, buffer);
lock (this.clients)
{
this.clients.Add(internalClient);
RaiseClientConnected(tcpClient);
}
try
{
NetworkStream networkStream = internalClient.NetworkStream;
networkStream.BeginRead(internalClient.Buffer, 0, internalClient.Buffer.Length, HandleDatagramReceived,
internalClient);
tcpListener.BeginAcceptTcpClient(new AsyncCallback(HandleTcpClientAccepted), ar.AsyncState);
}
catch
{
}
}
}
private void HandleDatagramReceivedToVerify(IAsyncResult ar)
{
if (IsRunning)
{
TcpClientState internalClient = (TcpClientState)ar.AsyncState;
NetworkStream networkStream = internalClient.NetworkStream;
int numberOfReadBytes = 0;
try
{
numberOfReadBytes = networkStream.EndRead(ar);
}
catch
{
numberOfReadBytes = 0;
}
if (numberOfReadBytes == 0)
{
//connection has been closed
lock (this.clients)
{
this.clients.Remove(internalClient);
RaiseClientDisconnected(internalClient.TcpClient);
return;
}
}
//received byte and trigger event notification
byte[] receivedBytes = new byte[numberOfReadBytes];
Buffer.BlockCopy(internalClient.Buffer, 0, receivedBytes, 0, numberOfReadBytes);
RaiseDatagramReceived(internalClient.TcpClient, receivedBytes);
RaisePlaintextReceived(internalClient.TcpClient, receivedBytes);
if (this.Encoding.GetString(receivedBytes) == LoginPassword)
{
//continue listening for tcp datagram packets
networkStream.BeginRead(internalClient.Buffer, 0, internalClient.Buffer.Length,
HandleDatagramReceived,
internalClient);
}
else
{
lock (this.clients)
{
this.clients.Remove(internalClient);
RaiseClientDisconnected(internalClient.TcpClient);
return;
}
}
}
}