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ECNDMFHP p2p Chat

This repository contains the p2p chat client using the ECNDMFHP protocol defined in the "Rechnernetze" (computer networks) course at HAW Hamburg. This chat automatically establishes a p2p network accross an IP-network between clients.

ECNDMFHP Protocol

ECNDMFHP is an acronym for:

  • Enter request
  • Connect
  • New users
  • Disconnect
  • Message
  • Failed
  • Heartbeat
  • Private

which describes the different package types the protocol consists of. Every client has a list of all currently connected clients within the p2p-network. If a new client joins, every client exchanges their clients with the new client, who in turn exchanges their clients with the clients of the existing network, establishing / extending the p2p-network.

Docker

This chat client can be built as a docker container. Simply call make with the docker recipe: make docker to create a docker image. Docker is also used to test the application by spawning containers with the application and then interacting with the containers through stdin / stdout.

Usage

chat --sctp INTERVAL_TIME
    INTERVAL_TIME: Interval time for the sctp heartbeat.
                   Setting the interval time also enables SCTP as the
                   transmission protocol.

When in the chat, use /connect IP_ADDRESS PORT to connect to another client / network.