/// <summary>
/// Connect the client (synchronous)
/// </summary>
/// <remarks>
/// Please note that synchronous connect will not receive data automatically!
/// You should use Receive() or ReceiveAsync() method manually after successful connection.
/// </remarks>
/// <returns>'true' if the client was successfully connected, 'false' if the client failed to connect</returns>
public virtual bool Connect()
{
if (IsConnected || IsHandshaked || IsConnecting || IsHandshaking)
{
return(false);
}
// Setup buffers
_receiveBuffer = new Buffer();
_sendBufferMain = new Buffer();
_sendBufferFlush = new Buffer();
// Setup event args
_connectEventArg = new SocketAsyncEventArgs();
_connectEventArg.RemoteEndPoint = Endpoint;
_connectEventArg.Completed += OnAsyncCompleted;
// Create a new client socket
Socket = CreateSocket();
// Apply the option: dual mode (this option must be applied before connecting)
if (Socket.AddressFamily == AddressFamily.InterNetworkV6)
{
Socket.DualMode = OptionDualMode;
}
try
{
// Connect to the server
Socket.Connect(Endpoint);
}
catch (SocketException ex)
{
// Close the client socket
Socket.Close();
// Dispose the client socket
Socket.Dispose();
// Dispose event arguments
_connectEventArg.Dispose();
// Call the client disconnected handler
SendError(ex.SocketErrorCode);
OnDisconnected();
return(false);
}
// Update the client socket disposed flag
IsSocketDisposed = false;
// Apply the option: keep alive
if (OptionKeepAlive)
{
Socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.KeepAlive, true);
}
// Apply the option: no delay
if (OptionNoDelay)
{
Socket.SetSocketOption(SocketOptionLevel.Tcp, SocketOptionName.NoDelay, true);
}
// Prepare receive & send buffers
_receiveBuffer.Reserve(OptionReceiveBufferSize);
_sendBufferMain.Reserve(OptionSendBufferSize);
_sendBufferFlush.Reserve(OptionSendBufferSize);
// Reset statistic
BytesPending = 0;
BytesSending = 0;
BytesSent = 0;
BytesReceived = 0;
// Update the connected flag
IsConnected = true;
// Call the client connected handler
OnConnected();
try
{
// Create SSL stream
_sslStreamId = Guid.NewGuid();
_sslStream = (Context.CertificateValidationCallback != null) ? new SslStream(new NetworkStream(Socket, false), false, Context.CertificateValidationCallback) : new SslStream(new NetworkStream(Socket, false), false);
// SSL handshake
_sslStream.AuthenticateAsClient(Address, Context.Certificates ?? new X509CertificateCollection(new[] { Context.Certificate }), Context.Protocols, true);
}
catch (Exception)
{
SendError(SocketError.NotConnected);
DisconnectAsync();
return(false);
}
// Update the handshaked flag
IsHandshaked = true;
// Call the session handshaked handler
OnHandshaked();
// Call the empty send buffer handler
if (_sendBufferMain.IsEmpty)
{
OnEmpty();
}
return(true);
}
