How we are using `smoltcp`

[thomaseizinger]

I reached for smoltcp because I needed to implement a TCP DNS server inside a TUN driver. The code is here: https://github.com/firezone/firezone/tree/main/rust/dns-over-tcp/src

Because we are also handling all sorts of other traffic and smoltcp is only responsible for managing TCP sockets, I had to create some adapter structs and workarounds to be able to selectively dispatch IP packets to it. It actually works pretty well but it took me a while to figure these things out.

• Is there any interest having these adapters in this repository in case other people have similar usecases?
• Is there maybe a better way of doing this and I haven't noticed?
• Should there be a better way of using smoltcp if you already have IP packets and want to just give it to smoltcp for processing?