static readonly object lockerDir = new object(); //each thread server must access to an exclusive section one at time
public void EntryPoint()
{
try // start both udp and tcp
{
threadUDP = new Thread(EntryUDP);
threadUDP.IsBackground = true;
threadUDP.Start();
threadTCP = new Thread(EntryTCP);
threadTCP.IsBackground = true;
threadTCP.SetApartmentState(ApartmentState.STA);
threadTCP.Start();
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
LANSharingApp.LogFile(e.Message, e.ToString(), e.Source);
// delegate the operation on form to the GUI
MessageFormError mfe = new MessageFormError("UDP or TCP service not available");
LANSharingApp.gui.Invoke((MethodInvoker) delegate() {
mfe.ShowDialog();
});
LANSharingApp.closing = true;
LANSharingApp.serverThread.Join();
LANSharingApp.clearTempFiles();
LANSharingApp.flushTmpDirectory();
Application.Exit();
}
}
void OnUdpMessageReceived(object sender, MulticastUdpClient.UdpMessageReceivedEventArgs e)
{
try
{
string receivedText = ASCIIEncoding.ASCII.GetString(e.Buffer);
string[] infoUser = receivedText.Split(','); //conversion
//Console.WriteLine("UDP- ricevuto un pacchetto.: " + infoUser[0] + " " + infoUser[1]);
// Console.WriteLine("UDP packet: " + infoUser[0] + ", " + infoUser[1] + ", " + infoUser[2] + " " + infoUser[3] + ", " + infoUser[4] + " " + infoUser[5]);
Image userImage;
userImage = Base64ToImage(infoUser[5]);
if (LANSharingApp.umu.isPresent(infoUser[1] + infoUser[0]))
{
User u = new User(infoUser[0], infoUser[1], infoUser[2], infoUser[3], infoUser[4], userImage); //create new user
if ((infoUser[2].CompareTo("online") == 0))
{
// check if the user is already registered
if (!u.isEqual(LANSharingApp.umu.getAdmin()))
{
LANSharingApp.umu.addUser(u); //add user
}
LANSharingApp.umu.resetUserTimer(infoUser[1] + infoUser[0]); // reset user timer
}
else
{
u.isOld();
}
}
else // user not in list
{
User p = new User(infoUser[0], infoUser[1], infoUser[2], infoUser[3], infoUser[4], userImage); //create new user
if (!p.isEqual(LANSharingApp.umu.getAdmin()))
{
if (infoUser[2].CompareTo("online") == 0) //check not equal to admin
{
LANSharingApp.umu.addUser(p); //add user
}
}
}
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
LANSharingApp.LogFile(ex.Message, ex.ToString(), ex.Source);
LANSharingApp.closing = true;
LANSharingApp.serverThread.Join();
LANSharingApp.clearTempFiles();
LANSharingApp.flushTmpDirectory();
Application.Exit();
}
}
// start to notify wiht UDP packets the online presence
public void EntryNotifyPresence()
{
try
{
while (!LANSharingApp.closing)
{
//check ethernet, need this line to generate exception!!!
string localIP = LANSharingApp.umu.GetLocalIP();
//check if localIP == Admin.getIP
if (!localIP.Equals(LANSharingApp.umu.getAdmin().getIp().ToString()))
{
LANSharingApp.umu.getAdmin().setIP(localIP);
Console.WriteLine("Internet Network Changed: Restart Procedure.");
// delegate the operation on form to the GUI
LANSharingApp.gui.Invoke((MethodInvoker) delegate() {
Application.Restart();
});
}
// send broadcast every 2s, only if ONLINE
if (LANSharingApp.umu.getAdmin().getState().CompareTo("online") == 0)
{
sendBroadcastPacket(LANSharingApp.umu.getAdmin().getString());
//Console.WriteLine("UDP packet Admin: "+ LANSharingApp.umu.getAdmin().getString());
}
// need a timer
Thread.Sleep(2000);
}
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
LANSharingApp.LogFile(e.Message, e.ToString(), e.Source);
LANSharingApp.closing = true;
// delegate the operation on form to the GUI
MessageFormError mfe = new MessageFormError("Error: no lan connection detected, connect to a lan then restart application.");
LANSharingApp.gui.Invoke((MethodInvoker) delegate() {
mfe.ShowDialog();
});
LANSharingApp.serverThread.Join();
LANSharingApp.clearTempFiles();
LANSharingApp.flushTmpDirectory();
Application.Exit();
}
}
// send udp packets for online-presence
static void sendBroadcastPacket(string message)
{
// there is a problem with d-link router --> need this broadcat, not IPAddress.Broadcast
IPEndPoint ipEP = new IPEndPoint(IPAddress.Broadcast, FTP_Port_send);
try
{
udpClientWrapper.SendMulticast(ASCIIEncoding.ASCII.GetBytes(message));
}
catch (Exception e)
{
Console.WriteLine("\n" + e.ToString());
LANSharingApp.LogFile(e.Message, e.ToString(), e.Source);
LANSharingApp.closing = true;
LANSharingApp.serverThread.Join();
LANSharingApp.clearTempFiles();
LANSharingApp.flushTmpDirectory();
Application.Exit();
}
}
// EntryPoint of TCP operation
public void EntryTCP()
{
try
{
// call only one time, on launch
if (LANSharingApp.umu.getAdmin().isOnline() && !LANSharingApp.closing)
{
ReceiveFileProcedure();
}
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
LANSharingApp.LogFile(e.Message, e.ToString(), e.Source);
LANSharingApp.closing = true;
LANSharingApp.serverThread.Join();
LANSharingApp.clearTempFiles();
LANSharingApp.flushTmpDirectory();
Application.Exit();
}
}
// EntryUDP start 2 thread: one for notify presence and one for detect other users on the LAN
public void EntryUDP()
{
try
{
//create MulticastUdpClient
udpClientWrapper = new MulticastUdpClient(multicastIPaddress, port, localIPaddress);
udpClientWrapper.UdpMessageReceived += OnUdpMessageReceived;
notifyPresenceUDP = new Thread(EntryNotifyPresence);
notifyPresenceUDP.IsBackground = true;
notifyPresenceUDP.Start();
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
LANSharingApp.LogFile(e.Message, e.ToString(), e.Source);
LANSharingApp.closing = true;
LANSharingApp.serverThread.Join();
LANSharingApp.clearTempFiles();
LANSharingApp.flushTmpDirectory();
Application.Exit();
}
}
