Handle returning to ice gathering stage

[johanhelsing]

Currently we stop anything related to ice once the data channel has opened, however It's possible to return to the ice gathering state, and we should probably handle that.

Ref this comment:

matchbox/matchbox_socket/src/webrtc_socket/wasm/message_loop.rs

Line 255 in 97c2ea1

// TODO: we should support getting new ICE candidates even after connecting,

https://developer.mozilla.org/en-US/docs/Web/API/RTCPeerConnection/iceGatheringState

[simbleau]

Is this only for WASM?

[johanhelsing]

I don't know/remember. Not really sure exactly what kinds of things will trigger additional gathering either.

Perhaps if you enable or disable wireless?

I wrote this down mostly because i saw it in the mdn docs and didn't want to forget about it.

[johanhelsing]

relevant docs: https://developer.mozilla.org/en-US/docs/Web/API/WebRTC_API/Session_lifetime#ice_restart

[simbleau]

This sounds low priority since it is a network renegotiation under rare circumstances to increase performance, not to solve a severe problem in connectivity.

Good find.

[johanhelsing]

Yes, let's ignore it for now, we have bigger fishes to fry :)