public void RedirectFrame(string destAddress, ushort destPort, byte[] frame)
{
if (!nodeConnections.TryGetValue(destAddress, out NodeConnection connection))
{
GUIWindow.PrintLog("The Node to which the message is attempted to be redirected is not connected!");
return;
}
//GUIWindow.PrintLog("Redirecting message to " + destAddress + ":" + destPort);
connection.SendMessage(frame);
}
public ConnectionListener()
{
cloudIP = Dns.GetHostEntry(ip).AddressList[0];
server = new TcpListener(cloudIP, cloudPort);
try {
server.Start();
GUIWindow.PrintLog("Server launched, waiting for clients...");
}
catch (Exception ex) {
GUIWindow.PrintLog(ex.ToString());
}
StartListening();
}
private void RedirectFrame(string srcAddress, ushort srcPort, Frame frame)
{
string targetAddress = "";
ushort targetPort = 0;
Tuple <int, string, int, string, int> target = null;
foreach (Tuple <int, string, int, string, int> tuple in Program.connectionTable)
{
if (tuple.Item2.Equals(srcAddress) && tuple.Item3 == srcPort)
{
targetAddress = tuple.Item4;
targetPort = (ushort)tuple.Item5;
target = tuple;
}
else if (tuple.Item4.Equals(srcAddress) && tuple.Item5 == srcPort)
{
targetAddress = tuple.Item2;
targetPort = (ushort)tuple.Item3;
target = tuple;
}
}
if (targetAddress.Length == 0)
{
GUIWindow.PrintLog("Could not find a link that contains a Node with given address and port");
return;
}
else if (Program.brokenConnections.Contains(target))
{
GUIWindow.PrintLog("Redirecting message to " + targetAddress + ":" + targetPort);
GUIWindow.PrintLog("Connection is not working! Packet is lost!");
return;
}
frame.RouterInPort = targetPort;
GUIWindow.PrintLog("Redirecting message to " + targetAddress + ":" + targetPort);
connectionListener.RedirectFrame(targetAddress, targetPort, SerializeObject(frame));
}
private void ReceiveMessages()
{
while (true)
{
byte[] receivedBufferL = new byte[16384];
try {
stream.Read(receivedBufferL, 0, receivedBufferL.Length);
} catch {
break;
}
byte[] receivedBuffer = new byte[8192];
Buffer.BlockCopy(receivedBufferL, 0, receivedBuffer, 0, receivedBuffer.Length);
Frame frame = (Frame)DeserializeObject(receivedBuffer);
if (frame.Message.Equals("_register_"))
{
Register(frame.SourceIP);
continue;
}
else if (frame.Message.Equals("_disconnect_"))
{
GUIWindow.PrintLog("Node " + ipAddress + " has disconnected from the server");
connectionListener.DisconnectNode(ipAddress);
stream.Close();
continue;
}
GUIWindow.PrintLog("Received message from " + frame.SourceIP.Split('/')[0] + ":" + frame.SourcePort);
RedirectFrame(frame.SourceIP.Split('/')[0], frame.SourcePort, frame);
}
}
public void RegisterNode(string ip, NodeConnection connection)
{
nodeConnections.Add(ip, connection);
GUIWindow.PrintLog("Node " + ip + " has connected to the server");
}
public GUIWindow()
{
InitializeComponent();
instance = this;
FillConnectionTable();
}
