private void ChangeLabel(MPLSPacket packet)
{
int oldPort = packet.DestinationPort;
int oldLabel = packet.GetLabelFromStack();
int[] FIBOutput = fib.GetOutput(oldPort, oldLabel, packet.ipPacket.destinationAddress);
int port = FIBOutput[0];
int label = FIBOutput[1];
packet.DestinationPort = port;
LogClass.WhiteLog("MPLSPacket from inPort " + oldPort + ": old label = " + oldLabel);
if (label != 0)
{
packet.PutLabelOnStack(label);
Console.WriteLine(" | new label = " + label);
}
else
{
Console.WriteLine(" | old label removed");
}
if (fib.LookForLabelToBeAdded(oldPort, oldLabel) != 0)
{
int addingLabel = fib.LookForLabelToBeAdded(oldPort, oldLabel);
packet.PutLabelOnStack(fib.LookForLabelToBeAdded(oldPort, oldLabel));
LogClass.Log("Starting new tunnel with label " + addingLabel);
ChangeLabel(packet);
}
else if (fib.LookForLabelToBeRemoved(oldPort, oldLabel) != 0)
{
LogClass.Log("Ending tunnel");
ChangeLabel(packet);
}
}
private void ChangeLabel(MPLSPacket packet)
{
int[] FIBOutput = fib.GetOutput(packet.destinationPort, packet.GetLabelFromStack());
int port = FIBOutput[0];
int label = FIBOutput[1];
packet.destinationPort = port;
packet.PutLabelOnStack(label);
}