Caching protocol:

A separate cache service is implemented external to MF click router and talks with the router through network socket.

The following packet types are defined:

REQ_PKT: Request packet received

REQ_ACK: Request ack sent out: hit or miss

REQ_RESP: Cached data sent for a request

DATA_PKT_C: Data packet received for caching

DATA_RESP: Indicate data cached and replaced


The message flow of caching is shown in the attached figure.