private void StopAllServices(Exception exception)
{
ClipboardNetworkChannel.StopService();
ClipboardTrasfer.StopService();
InputNetworkChannel.StopService();
}
private void WaitForClients(object arg)
{
Settings settings = arg as Settings;
keepAlive = new KeepaliveChannel(settings.KeepAlivePort);
ClientAuthenticated += Connection_Keeplive_OnClientAuthenticated;
ClientDisconnected += StopAllServices;
ClientDisconnected += Connection_Keeplive_OnClientDisconnected;
keepAlive.DeadClient += Connection_Keepalive_OnDeadClient;
OnStarted();
while (true) /*loop among all clients who will connect to me*/
{
actualClient = null;
IPEndPoint clientEndpoint = null;
byte[] buffer = new byte[64];
try {
while (true) //loop until a client is authenticated
{
try {
actualClient = listener.Accept();
} catch (Exception) { /*listening socket closed by Stop()*/
goto finish;
}
clientEndpoint = (IPEndPoint)actualClient.RemoteEndPoint;
settings.ClientIP = clientEndpoint.Address;
OnClientConnected(clientEndpoint);
int recv = actualClient.Receive(buffer);
if (recv == 0) /*the client shuts down the Socket connection with the Shutdown method*/
{
throw new SocketException();
}
bool authenticated = Encoding.Unicode.GetString(buffer).Equals(passwdDigest);
if (authenticated)
{
break;
}
actualClient.Send(Encoding.Unicode.GetBytes("NO"));
actualClient.Shutdown(SocketShutdown.Both);
actualClient.Disconnect(true);
}
} catch (SocketException) {
actualClient.Shutdown(SocketShutdown.Both);
actualClient.Disconnect(true);
continue;
}
OnClientAuthenticated(); // Client is authenticated. Invoke callbacks and open all channels
try {
IPAddress clientIP = clientEndpoint.Address;
ClipboardNetworkChannel.StartService(settings.ClipboardReceivingPort);
InputNetworkChannel.StartService(settings.InputReceivingPort);
actualClient.Send(Encoding.Unicode.GetBytes("OK"));
ClipboardTrasfer.Target = new IPEndPoint(clientIP, settings.ClipboardTransferPort);
//wait synchronously for BYE from client before closing correctly the socket
actualClient.Receive(buffer);
Console.WriteLine("Received " + Encoding.Unicode.GetString(buffer) + " from client");
} catch (Exception e) {
Console.WriteLine("{0}:{1}", e.GetType().Name, e.Message);
}
finally {
Utility.ShutdownSocket(actualClient);
OnClientDisconnected(null);
}
//finished serving this client
}
finish:
OnStopped();
Console.WriteLine("Client accepting channel CLOSED!!! BYE");
}