I’ve encountered several mentions of Wireguard on the net without being curious about its inner workings. I’ve come across multiple mentions of VPNs on the net without (again) ever being curious about their inner workings. This year, I decided to be curious about it. Since Wireguard has been touted as a simple VPN protocol and implementation, it seemed the perfect gateway to finally understand those sorts. Now, I believe that to strongly understand a computer-related topic, you should at least build a simple implementation of it. That is what Steve and I did.

This post is for those who are interested in the internal details of the BitTorrent protocol.

This post contains all that I’ve learnt about building a BitTorrent Client with C. It’s not a replacement for the BitTorrent Protocol spec. You can find the official spec here though this is not as detailed and thorough as the unofficial spec. I advise you to read both of them for a more comprehensive understanding of the protocol.