 packets to make the transportation process function properly. When there are new socket operations — like a new socket being created — the <code>sock_ops</code> function is executed. The socket metadata is obtained and stored in the <code>sock_map</code> to be used when processing packets. The common key type in the <code>sock_map</code> is a &ldquo;quadruple&rdquo; of source and destination addresses and ports. With the key and the rules stored in the map, the destination socket will be found when a n