Is IPv6 supported?

[cheerfulstoic]

It seems like the opts given to :gen_udp.open/2 maybe needs to have :inet6 given to enable support for IPv6. If so, and if I'm reading the UDP module right, that's not currently possible.

Does that all seem right to you? I could potentially make a PR for this, but I wanted to sanity check first 😄

[cheerfulstoic]

Some background on what I'm trying to do, in case it helps: https://community.fly.io/t/using-wireguard-to-connect-to-service-on-my-laptop/13788/3

[cheerfulstoic]

I just tried a patched version which hardcodes :inet6 as an option, but that didn't seem to help anything. Maybe it's a network config issue... 🤔 Happy to have advice if you have any 😄

[mbuffa]

Hello there!

Just trying to configure telemetry on fly.io myself, and I think you might be up to something.

In my case, I got a DogStatsD agent running in a container as a dedicated Fly.io app. Fly has internal DNS records and digging the DNS entry on my app works (https://fly.io/docs/reference/private-networking/).

However, calling :inet.gethostbyname("my-app-name.internal") doesn't, it's used by the library, and it has a inet6 option.

[cheerfulstoic]

Ok, after a bunch of poking I think that adding the :inet6 option does help. I think that my fork changes weren't going up to fly.io before 😅