Algorithm 3. INTEREST packet processing.

1: Whenever the INTEREST packet arrived

2: Lookup into CS table

3: if (CS hit) then

4:  search the DATA

5:  return to the intended interface

6: else if (PIT hit) then

7:  adds the incoming interface (from which requests have arrived) in PIT

8:  wait for DATA packet

// do not forward the packet

9: else if (FIB hit) then

10:  create PIT entry for requested INTEREST packet

11:  forward packet according to Flow rule

12: else

13:  send OF_Packet_IN message to controller

14:  install flow rule into FIB by the controller through OF_FLOW_MOD

15:  forwards the packet to the next station according to FIB

16: end if