Session class should have a creation timestamp

The client needs to have implementation for handling handshake packets from the server, this includes storing the session id for future messages

Maybe the server should run a repeating task to remove any sessions that are dormant

The server needs to respond to a valid handshake response with its protocol version. upon the client receiving this packet, the client should compare the servers protocol version to the clients protocol version and return an error if they do not match.

A valid handshake is defined here as a client handshake that has a correct protocol version and did not get lead to an error packet

The server should send the client a heartbeat interval (possibly in the handshake from the server or a when the client authenticates) to which a client should send a heartbeat packet every X seconds so the server keeps the connection alive.

The server might also request a heartbeat from a client, conditions on when this happens are TBD

on the server receiving a heartbeat packet, it should respond with a heartbeat ack

The server should remove sessions when a client disconnects

This could be used to check when a client last contacted the server and used for detecting zombie sessions