[nostream]

zx2c4: Which language is the linux version of wireguard written in?

[rumpelsepp]

the reference implementation is a linux kernel module: https://git.zx2c4.com/WireGuard/

there are currently at least two actively developped open source userspace implementations in different languages. Two examples are Go and Rust:

https://git.zx2c4.com/wireguard-go/ https://git.zx2c4.com/wireguard-rs/