arpchat is a chat app built on the concept of ARP, the protocol used by computers to find MAC addresses on a network. The app was created in just two days out of boredom. Despite its seemingly useless nature, there is a potential use case for being on a client isolated network and wanting to chat with friends. Not only can you send long messages and enjoy compression, but there are also join and leave notifications, as well as a presence discovery and heartbeat system. It’s almost like a twisted version of ARP itself. If you’re interested, you can install arpchat from the releases page, but be sure to follow the necessary steps and check for any issues. Building it yourself may be more trouble than it’s worth, but it has been tested for the latest unstable Rust.
https://github.com/kognise/arpchat