private void SendConnectionAlivenessVerificationCallback(IAsyncResult ar)
{
SocketError sockErr = new SocketError();
try
{
// End the sending.
int bytesSent = _clientSocket.EndSend(ar, out sockErr);
if (!sockErr.Equals(SocketError.Success) && !sockErr.Equals(SocketError.WouldBlock))
{
_mainWinWMCaller.CancelStringCommand();
// Close the connection with the server. The disconnect function calls the CloseClient, the Remove server, and the removeProcessesFromApplication.
_mainWinWMCaller.DisconnectFromServer(this.ServerIpAddress);
System.Windows.Application.Current.Dispatcher.Invoke((Action) delegate
{
// Open the Error Window
Views.ErrorWindowView errView = new Views.ErrorWindowView();
ErrorWindowViewModel errWindViewModel = new ErrorWindowViewModel("Server " + this.ServerIpAddress.ToString() + " disconnesso.");
errWindViewModel.ClosingRequest += errView.Close;
errView.DataContext = errWindViewModel;
errView.Show();
});
}
}
catch (Exception e)
{
// Check if the socket error is not WouldBlock (that is not a proper error):
// in this case return without taking action
if (sockErr.Equals(SocketError.WouldBlock))
{
Console.WriteLine(e.ToString());
}
else
{
_mainWinWMCaller.CancelStringCommand();
Console.WriteLine(e.ToString());
// Close the connection with the server. The disconnect function calls the CloseClient, the Remove server, and the removeProcessesFromApplication.
_mainWinWMCaller.DisconnectFromServer(this.ServerIpAddress);
System.Windows.Application.Current.Dispatcher.Invoke((Action) delegate
{
// Open the Error Window
Views.ErrorWindowView errView = new Views.ErrorWindowView();
ErrorWindowViewModel errWindViewModel = new ErrorWindowViewModel("Server " + this.ServerIpAddress.ToString() + " disconnesso.");
errWindViewModel.ClosingRequest += errView.Close;
errView.DataContext = errWindViewModel;
errView.Show();
});
}
}
}
private void Connect()
{
if (ServersStorage.ServerSocket != null)
{
ServersStorage.SelectedServer = null;
if (ServersStorage.ServerSocket.Connected)
{
ServersStorage.ServerSocket.Close();
}
ServersStorage.ServerSocket = null;
}
SocketError result = SocketError.Fault;
Socket _socket = null;
ManualResetEvent _clientDone = new ManualResetEvent(false);
DnsEndPoint hostEntry = new DnsEndPoint(hostName, portNumber);
_socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
SocketAsyncEventArgs socketEventArg = new SocketAsyncEventArgs();
socketEventArg.RemoteEndPoint = hostEntry;
socketEventArg.Completed += new EventHandler <SocketAsyncEventArgs>(delegate(object s, SocketAsyncEventArgs e)
{
result = e.SocketError;
if (!result.Equals(SocketError.Success))
{
Dispatcher.BeginInvoke(delegate() { MessageBox.Show("Failed to connect"); });
}
else
{
Dispatcher.BeginInvoke(delegate() { NavigationService.GoBack(); });
}
_clientDone.Set();
});
_clientDone.Reset();
_socket.ConnectAsync(socketEventArg);
_clientDone.WaitOne(2000);
if (_socket != null && _socket.Connected)
{
SocketAsyncEventArgs toBeSent = new SocketAsyncEventArgs();
toBeSent.RemoteEndPoint = _socket.RemoteEndPoint;
toBeSent.UserToken = null;
byte[] payload = IntroductionMessage.GetMessage();
toBeSent.SetBuffer(payload, 0, payload.Length);
_socket.SendAsync(toBeSent);
ServersStorage.ServerSocket = _socket;
ServersStorage.SelectedServer = new ServerData(host, hostName, portNumber);
}
}
public static void ReestabilishConnection()
{
if (SelectedServer != null && ServerSocket != null && !ServerSocket.Connected)
{
Debug.WriteLine("Reestabilishing connection");
SocketError result = SocketError.Fault;
Socket _socket = null;
ManualResetEvent _clientDone = new ManualResetEvent(false);
DnsEndPoint hostEntry = new DnsEndPoint(SelectedServer.Address, SelectedServer.Port);
_socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
SocketAsyncEventArgs socketEventArg = new SocketAsyncEventArgs();
socketEventArg.RemoteEndPoint = hostEntry;
socketEventArg.Completed += new EventHandler <SocketAsyncEventArgs>(delegate(object s, SocketAsyncEventArgs e)
{
result = e.SocketError;
if (!result.Equals(SocketError.Success) && OnConnectionFailed != null)
{
OnConnectionFailed();
}
_clientDone.Set();
});
_clientDone.Reset();
_socket.ConnectAsync(socketEventArg);
_clientDone.WaitOne(2000);
if (_socket != null && _socket.Connected)
{
SocketAsyncEventArgs toBeSent = new SocketAsyncEventArgs();
toBeSent.RemoteEndPoint = _socket.RemoteEndPoint;
toBeSent.UserToken = null;
byte[] payload = IntroductionMessage.GetMessage();
toBeSent.SetBuffer(payload, 0, payload.Length);
_socket.SendAsync(toBeSent);
ServersStorage.ServerSocket = _socket;
}
}
}
