/// <summary>
/// Callback when one client successfully connected to the server.
/// </summary>
private void AcceptCallback(IAsyncResult ar)
{
try
{
// Signal the connect thread to continue.
connectDone.Set();
// Dont accept connection if the server is not running and the listener is null
if (!IsServerRunning || _listener == null)
{
log.Error("Server is not running");
return;
}
// Get the socket that handles the client request.
Socket listener = (Socket)ar.AsyncState;
Socket handler = listener.EndAccept(ar);
IPEndPoint ipEndPoint = handler.RemoteEndPoint as IPEndPoint;
// Try to get the Hostname of the client which will connect to the server
IPHostEntry entry = ServerFunctions.GetIPHostEntryOfClient(ipEndPoint);
// Check if the client which wants to connect is already connected.
// If Client is not connected then try to connect to the server
if (!ServerFunctions.CheckClientStatus(this.ConnectedClients, handler, false) && ipEndPoint != null)
{
// Add connected Client to the listbox
ServerWindow.Dispatcher.Invoke(new AddClientHandler(ServerWindow.AddClient), ipEndPoint, entry);
// Add connected client to the connected client list
this.ConnectedClients.Add(handler);
log.Info("Client " + entry.HostName + " successfully connected to the server.");
log.Info("");
}
else
{
// Check if the already connected client is still connected.
// If the already connected client is connected then close the same client which tries to connect again
if (ServerFunctions.CheckClientStatus(this.ConnectedClients, handler, true))
{
log.Info("Client " + entry.HostName + " already connected. Dont connect to server.");
// Close socket because this socket is already connected
handler.Shutdown(SocketShutdown.Both);
handler.Close();
}
else
{
// Delete the already connected client and connect the new client which tries to connect
this.DeleteAndAddConnectedClient(this.ConnectedClients, handler);
}
}
}
catch (Exception ex)
{
log.Error(ex.Message, ex);
}
}
/// <summary>
/// Method which which deletes the disconnected client and connect the new client which tries to connect
/// </summary>
private void DeleteAndAddConnectedClient(IList <Socket> socketList, Socket socket)
{
IPEndPoint s1 = socket.RemoteEndPoint as IPEndPoint;
for (int i = 0; i < socketList.Count; i++)
{
try
{
IPEndPoint s2 = socketList[i].RemoteEndPoint as IPEndPoint;
if (s1.Address.Equals(s2.Address))
{
ServerWindow.Dispatcher.Invoke(new RemoveClientSocketHandler(ServerWindow.RemoveClient), s1.Address.ToString(), false);
ServerWindow.Dispatcher.Invoke(new RemoveClientHandler(ServerWindow.RemoveClientSocket), s1.Address.ToString(), false);
// Add connected Client to the listbox
// Try to get the Hostname of the client which will connect to the server
IPEndPoint ipEndPoint = socket.RemoteEndPoint as IPEndPoint;
IPHostEntry entry = ServerFunctions.GetIPHostEntryOfClient(ipEndPoint);
// Add connected Client to the listbox
ServerWindow.Dispatcher.Invoke(new AddClientHandler(ServerWindow.AddClient), ipEndPoint, entry);
// Add connected client to the connected client list
this.ConnectedClients.Add(socket);
log.Info("Client " + entry.HostName + " successfully reconnected to the server.");
log.Info("");
return;
}
}
catch (Exception ex)
{
log.Error(ex.Message, ex);
}
}
}
