[tor-bugs] #28942 [Circumvention/Snowflake]: Evaluate pion WebRTC

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#28942: Evaluate pion WebRTC
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 Reporter:  backkem                         |          Owner:  cohosh
     Type:  enhancement                     |         Status:  accepted
 Priority:  Medium                          |      Milestone:
Component:  Circumvention/Snowflake         |        Version:
 Severity:  Normal                          |     Resolution:
 Keywords:  anti-censorship-roadmap-august  |  Actual Points:
Parent ID:                                  |         Points:  5
 Reviewer:                                  |        Sponsor:
                                            |  Sponsor28-must
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Comment (by cohosh):

 Well I can narrow down that at least one problem I'm having using just
 master versions of pion dependencies from the snowflake
 [https://github.com/cohosh/snowflake/commit/3cc240625cad22db02eca7af41b139606c13147d
 pion branch] is due to ICE not gathering any candidates.

 For me the client isn't even contacting the broker, but stalling in
 `exchangeSDP`
 [https://github.com/cohosh/snowflake/blob/pion/client/lib/webrtc.go#L298
 L298] waiting for an offer to be sent from when the ICE gathering is
 completed
 [https://github.com/cohosh/snowflake/blob/pion/client/lib/webrtc.go#L174
 L174]. I don't see any log messages from `OnICECandidate`.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/28942#comment:52>
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