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> cloudflaredd is a small script

... which it is not. It is a compiled binary.

I enjoyed having a skim through this code, as I didn't know about STUN before. I've built a similar utility for cloudflare-as-dynamic-dns [1], written in Node.js because it just runs on my home server and isn't performance critical.

I might have a shot at changing the IP retrieval from calling the ipify API into some STUN implementation; are there any pitfalls or gotchas you've come across when implementing STUN?

[1] https://github.com/Commander-lol/cfdns

Curious why one would want to compile in the configuration rather than make them provided at runtime? Is there a limitation of systemd I’m unaware of is it just the author didn’t complete that?

Compiling the configuration into the program eliminated a ton of string parsing and other annoyances. For my use case, it wasn't a super high priority either. That being said, if it would be a benefit to you or anyone else, let me know and I will add it in when I have time.

At the very least use a config.h file like the suckless tools do.

Cloudflaredd – Dynamic DNS Client for Cloudflare Using STUN