This code simulates the HLR in this case. In normal scenarios the communication occurs between the GGSN and HLR to retrieve the IP addresses
of the current serving SGSN

The hardocded Values to be used:
=================================
Client PC: 1
Client IP: 192.168.56.101
Client port: 2905
Peer PC: 2
Peer IP: 192.168.56.102
Peer port: 2906
Target IMSI :(a 15-16 digits number i.e 234333456789012)
Target HLR: 441234567890
GGSN GT : (a 12 digits number i.e 201059996612)



Server Side Execution:
======================
java -jar SendRoutingInfoForGPRS.jar

