fix: multistream-select negotiation on outbound substream over webrtc #465
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…cation, modify multistream protocol message, modify opening based on str0m api changes
haikoschol
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haikoschol
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Nov 5, 2025
| protocol: protocol.to_string(), | ||
| }); | ||
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| // self.rtc.channel(channel_id).unwrap().set_buffered_amount_low_threshold(1024); |
haikoschol
commented
Nov 5, 2025
| event = self.handles.next() => match event { | ||
| None => unreachable!(), | ||
| Some((channel_id, None | Some(SubstreamEvent::Close))) => { | ||
| Some((_, None)) => {} |
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This is a superficial fix for another unrelated issue which I haven't investigated yet. Without this change, a "channel closed" event is fired repeatedly after a while. I believe this is caused by SubstreamHandle::tx being dropped, presumably when the substream(/channel?) is closed. The fact that the event continues firing suggests that SubstreamHandle::rx continues to be polled. Maybe the handle simply needs to be removed from self.handles?
I've also seen this happen when briefly testing with a rust-libp2p dialer, so this is not related to smoldot interop.
This was referenced Nov 5, 2025
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This PR changes how multistream-select messages received on an opening outbound substream are handled on webrtc connections. For details please see the issue description.
The PR builds on top of #441 for the str0m update. But looking at it again I realized that it also made changes to multistream-select handling. I'll look into what those are and how they relate to my changes. In any case, I believe my changes bring the implementation closer to compliance with the multistream-select spec and enable interoperability with smoldot.
fixes #464