WebRTC echo server

[fippo]

No description provided.

[fippo]

@foolip: @alvestrand says you might be able to help.
We discussed the topic of wire-level WebRTC testing in the WG back in February 2021, see minutes or recording for the motivation.
The energy for this has been pretty low sadly (hence the almost two years delay) but if we can get the basic infrastructure in place it might be enough to let Harald ask for tests which usually motivates folks.

This is modelled after the aioquic-based server which was super helpful to follow (aiortc and aioquic being written by the same person helped too).

What would it take to land this?

Possibly without any active tests first and then we iterate in the chromium infrastructure because how stable such a test is... remains to be seen 🤞 (I still remember how much effort went into this back in the day)

[henbos]

While not up to speed on the capabilities of this server, having an echo server sounds like something that could help with improving test coverage of webrtc stats (w3c/webrtc-stats#760).

Today we mostly just assert the presence of metrics, not what any of the counters should be...

@foolip is adding a pyhton server to WPTs something that can/should be done?

[foolip]

@henbos yes, I think such a server would be accepted in this project. It's a bit of work and requires going through the process at https://github.com/web-platform-tests/rfcs, but the concept should be uncontroversial as it's similar to how we test HTTP, WebTransport, etc.

[fippo]

since I just struggled remembering here is the tldr for getting this to run:

python -m venv env
env\scripts\activate
pip install -r tools\webrtc\requirements.txt
python wpt serve --webrtc