Build custom P2P messaging protocol over BitTorrent in 10 minutes

What it does

Bt is a modern Java 8 BitTorrent library. It offers good performance, reliability and is highly customizable. Extension Protocol is the preferred way of building custom messaging on top of BitTorrent. There is a bunch of well-known messages: ut_pex ( Peer Exchange ), ut_metadata ( magnet: links ), and others. Bt provides a simple way to utilize the same mechanism to create custom protocols. In this tutorial we are going to create a simple extension that will let peers know what their external IP address looks like (or how this peer is seen by the others). In real BitTorrent this information is provided during the extended handshake procedure. Source code and runnable program are available…from atomashpolskiy.github.io

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