void m_Connection_StatusChange(object sender, ConnectionStatusChangeEventArgs e)
{
var StatusChangeArgs = new ClientInterfaceStatusChangeEventArgs();
StatusChangeArgs.Status = e.State;
OnStatusChange(StatusChangeArgs);
}
protected virtual void OnStatusChange(ConnectionStatusChangeEventArgs e)
{
var handler = StatusChange;
if (handler != null)
{
handler(this, e);
}
}
void m_Connection_StatusChange(object sender, ConnectionStatusChangeEventArgs e)
{
// Log.WriteLog(Log.LogLevelType.Comm, "CommandInterface::StatusChange(): " +
// "[" + m_Connection.Address + ":" + m_Connection.Port + "] " +
// "State Change to " + e.State.ToString().ToUpper());
var StatusChangeArgs = new CommandInterfaceStatusChangeEventArgs();
StatusChangeArgs.Status = e.State;
OnStatusChange(StatusChangeArgs);
}
private void ConnectCallback(IAsyncResult ar)
{
StateObject state = (StateObject)ar.AsyncState;
Socket client = state.WorkSocket;
m_Connecting = false;
//ensure current client connection is the same as
//the one contained in the callback object
if (client != ClientSocket)
{
return;
}
try
{
client.EndConnect(ar);
}
catch (SocketException e)
{
ConnectionErrorEventArgs args = new ConnectionErrorEventArgs();
args.ConnectionID = m_ID;
args.ErrorCode = e.ErrorCode;
args.ErrorMessage = e.Message;
OnError(args);
Disconnect();
return;
}
catch (Exception)
{
Disconnect();
return;
}
if (client != ClientSocket)
{
return;
}
if (client.Connected == true)
{
ConnectionStatusChangeEventArgs StatusArgs = new ConnectionStatusChangeEventArgs();
StatusArgs.ConnectionID = m_ID;
StatusArgs.State = ConnectionStatus.CONNECTED;
OnStatusChange(StatusArgs);
if (client != ClientSocket)
{
Disconnect();
return;
}
if (ClientSocket == null)
{
return;
}
if (client.Connected == false)
{
Disconnect();
return;
}
try
{
client.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0, new AsyncCallback(ReceiveCallback), state);
}
catch (SocketException e)
{
ConnectionErrorEventArgs args = new ConnectionErrorEventArgs();
args.ConnectionID = m_ID;
args.ErrorCode = e.ErrorCode;
args.ErrorMessage = e.Message;
OnError(args);
return;
}
catch (Exception)
{
return;
}
}
}
public Boolean Disconnect()
{
m_Connecting = false;
//if socket is created
if (ClientSocket != null)
{
//if socket is connected, disconnect
if (ClientSocket.Connected == true)
{
try
{
//Turn off Sending
ClientSocket.Shutdown(SocketShutdown.Send);
//ClientSocket.Disconnect(True)
//wait for socket to be empty
Byte[] b = new Byte[256];
while (ClientSocket.Receive(b, 256, SocketFlags.None) > 0)
{
System.Threading.Thread.Sleep(1);
}
//Shutdown the Recieve Socket!
if (ClientSocket != null)
{
ClientSocket.Shutdown(SocketShutdown.Receive);
}
}
catch (SocketException e)
{
ConnectionErrorEventArgs args = new ConnectionErrorEventArgs();
args.ConnectionID = m_ID;
args.ErrorCode = e.ErrorCode;
args.ErrorMessage = e.Message;
OnError(args);
}
catch (Exception)
{
/* We are trying to catch the NullReferenceException
* but we still want to trigger the ConnectionStatusChangeEventArgs
* so allow the error to fall through
*/
}
if (ClientSocket != null)
{
try
{
ClientSocket.Disconnect(false);
}
catch (SocketException e)
{
ConnectionErrorEventArgs args = new ConnectionErrorEventArgs();
args.ConnectionID = m_ID;
args.ErrorCode = e.ErrorCode;
args.ErrorMessage = e.Message;
OnError(args);
}
catch (Exception)
{
/* We are trying to catch the NullReferenceException
* but we still want to trigger the ConnectionStatusChangeEventArgs
* so allow the error to fall through
*/
}
}
}
//close socket object
if (ClientSocket != null)
{
ClientSocket.Close(1);
ClientSocket = null;
}
ConnectionStatusChangeEventArgs StatusArgs = new ConnectionStatusChangeEventArgs();
StatusArgs.ConnectionID = m_ID;
StatusArgs.State = ConnectionStatus.DISCONNECTED;
OnStatusChange(StatusArgs);
}
Address = "";
Port = 0;
return(true);
}
public Boolean Connect(int Port, string Address)
{
if (Address == null)
{
return(false);
}
if ((Port == 0) || (Address.Trim() == ""))
{
return(false);
}
//already connected
if (Connected)
{
return(false);
}
//already in async connect
if (m_Connecting == true)
{
return(true);
}
//trying to connect when already connected, return true
//if (ClientSocket != null)
// if (ClientSocket.Connected == true)
// return true;
this.Address = Address;
this.Port = Port;
//create new connection
ClientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
StateObject state = new StateObject();
state.WorkSocket = ClientSocket;
m_Connecting = true;
ConnectionStatusChangeEventArgs StatusArgs = new ConnectionStatusChangeEventArgs();
StatusArgs.ConnectionID = m_ID;
StatusArgs.State = ConnectionStatus.CONNECTING;
OnStatusChange(StatusArgs);
try
{
ClientSocket.BeginConnect(Address, Port, new AsyncCallback(ConnectCallback), state);
}
catch (SocketException e)
{
/* Generate Event */
ConnectionErrorEventArgs args = new ConnectionErrorEventArgs();
args.ConnectionID = m_ID;
args.ErrorCode = e.ErrorCode;
args.ErrorMessage = e.Message;
OnError(args);
Disconnect();
return(false);
}
catch (Exception)
{
Disconnect();
return(false);
}
return(true);
}