RIPcode

RIPListen.java

The listener, which receives datagrams at the specified port, turns each one into a DataInputStream, and gives it to RIPPacket to parse.

RIPPacket.java

This grabs off the 4-byte RIP header, counts how many route entries there are, and runs a loop letting a RIPEntry parse each route entry.

RIPEntry.java

This parses the 20-byte entry, learning in particular the address, mask, nexthop, and metric.