/// <summary> Function to remove a socket from the list of sockets </summary>
/// <param name="connection">The index of the socket to remove </param>
public void RemoveSocket(AdkSocketConnection connection)
{
lock (fSocketConnections.SyncRoot)
{
try
{
fSocketConnections.Remove(connection);
}
catch
{
}
}
}
/// <summary>
/// Closes any idle socket connections
/// </summary>
public void Cleanup(object timeInterval)
{
try
{
fCleanupTimer.Change(Timeout.Infinite, Timeout.Infinite);
lock (fSocketConnections.SyncRoot)
{
for (int i = fSocketConnections.Count - 1; i > -1; i--)
{
AdkSocketConnection connection = (AdkSocketConnection)fSocketConnections[i];
if (connection.IdleTime.TotalSeconds > KEEP_ALIVE_TIME)
{
connection.Dispose(); // will automatically remove itself
}
}
}
}
finally
{
TimeSpan timerInterval = (TimeSpan)timeInterval;
fCleanupTimer.Change(timerInterval, timerInterval);
}
}
/// <summary> Function to process and accept socket connection requests </summary>
private void AcceptNewConnection( IAsyncResult ar )
{
if ( fIsShuttingDown )
{
return;
}
IConnectedSocket clientSocket = null;
try
{
// Call the derived class's accept handler
clientSocket = fAcceptSocket.EndAccept( ar );
if ( !clientSocket.Connected )
{
return;
}
lock ( fSocketConnections.SyncRoot )
{
try
{
// If we have room to accept this connection
if ( fSocketConnections.Count <= MaxClientConnections )
{
// Create a AdkSocketConnection object
AdkSocketConnection adkSocket = new AdkSocketConnection
(
this, clientSocket, RawBufferSize,
DataReceived,
SocketClosed,
SocketError
);
// Call the Accept Handler
fSocketConnections.Add( adkSocket );
if ( SocketAccepted != null )
{
try
{
SocketAccepted( adkSocket );
}
catch
{
}
}
}
else
{
OnMaxConnectionsReached( clientSocket );
// Close the socket connection
clientSocket.Shutdown( SocketShutdown.Both );
clientSocket.Close();
}
}
catch ( SocketException e )
{
// Did we stop the TCPListener
if ( e.ErrorCode == 10004 )
{
// The connection is being shut down, ignore the error
}
else
{
OnError( e );
// Close the socket down if it exists
if ( clientSocket != null && clientSocket.Connected )
{
clientSocket.Shutdown( SocketShutdown.Both );
clientSocket.Close();
}
}
}
catch ( Exception ex )
{
OnError( ex );
// Close the socket down if it exists
if ( clientSocket != null && clientSocket.Connected )
{
clientSocket.Shutdown( SocketShutdown.Both );
clientSocket.Close();
}
}
}
}
catch ( SocketException e )
{
// Did we stop the TCPListener
if ( e.ErrorCode == 10004 )
{
// We're done
return;
}
else
{
OnError( e );
// Close the socket down if it exists
if ( clientSocket != null && clientSocket.Connected )
{
clientSocket.Shutdown( SocketShutdown.Both );
clientSocket.Close();
}
}
}
finally
{
if ( fIsRunning )
{
fAcceptSocket.BeginAccept( new AsyncCallback( AcceptNewConnection ), null );
}
}
}
/// <summary> Function to remove a socket from the list of sockets </summary>
/// <param name="connection">The index of the socket to remove </param>
public void RemoveSocket( AdkSocketConnection connection )
{
lock ( fSocketConnections.SyncRoot )
{
try
{
fSocketConnections.Remove( connection );
}
catch
{
}
}
}
/// <summary> Function to process and accept socket connection requests </summary>
private void AcceptNewConnection(IAsyncResult ar)
{
if (fIsShuttingDown)
{
return;
}
IConnectedSocket clientSocket = null;
try
{
// Call the derived class's accept handler
clientSocket = fAcceptSocket.EndAccept(ar);
if (!clientSocket.Connected)
{
return;
}
lock (fSocketConnections.SyncRoot)
{
try
{
// If we have room to accept this connection
if (fSocketConnections.Count <= MaxClientConnections)
{
// Create a AdkSocketConnection object
AdkSocketConnection adkSocket = new AdkSocketConnection
(
this, clientSocket, RawBufferSize,
DataReceived,
SocketClosed,
SocketError
);
// Call the Accept Handler
fSocketConnections.Add(adkSocket);
if (SocketAccepted != null)
{
try
{
SocketAccepted(adkSocket);
}
catch
{
}
}
}
else
{
OnMaxConnectionsReached(clientSocket);
// Close the socket connection
clientSocket.Shutdown(SocketShutdown.Both);
clientSocket.Close();
}
}
catch (SocketException e)
{
// Did we stop the TCPListener
if (e.ErrorCode == 10004)
{
// The connection is being shut down, ignore the error
}
else
{
OnError(e);
// Close the socket down if it exists
if (clientSocket != null && clientSocket.Connected)
{
clientSocket.Shutdown(SocketShutdown.Both);
clientSocket.Close();
}
}
}
catch (Exception ex)
{
OnError(ex);
// Close the socket down if it exists
if (clientSocket != null && clientSocket.Connected)
{
clientSocket.Shutdown(SocketShutdown.Both);
clientSocket.Close();
}
}
}
}
catch (SocketException e)
{
// Did we stop the TCPListener
if (e.ErrorCode == 10004)
{
// We're done
return;
}
else
{
OnError(e);
// Close the socket down if it exists
if (clientSocket != null && clientSocket.Connected)
{
clientSocket.Shutdown(SocketShutdown.Both);
clientSocket.Close();
}
}
}
finally
{
if (fIsRunning)
{
fAcceptSocket.BeginAccept(new AsyncCallback(AcceptNewConnection), null);
}
}
}
