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

#28942: Evaluate pion WebRTC
--------------------------------------------+------------------------------
 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
--------------------------------------------+------------------------------

Comment (by dcf):

 Replying to [comment:54 cohosh]:
 > In addition to the issues above, which can be solved with the attached
 patch

 I've started a build using the patch. The exact commit I'm building from
 is [https://gitweb.torproject.org/user/dcf/tor-browser-build.git/log/?h
 =pion-webrtc&id=f52281ae5bca107414a5292e74e2f1eca0608a3b
 f52281ae5bca107414a5292e74e2f1eca0608a3b]. Specifically, it makes the
 following changes relative to comment:51:
  * Applied attachment:0001-Allow-gathering-of-candidates-to-generate-
 offer.patch.
  * Picked up your
 [https://github.com/cohosh/snowflake/commit/e5040c70f9a4d8e47ed9e37b2f0c944859a9c56c
 "Make sure command line ice servers are used"] commit.
  * It does ''not'' pick up the
 [https://github.com/cohosh/snowflake/commit/ee8ddfe579092a126434bae4cf83203caf1d818b
 "Connect pion library logger with snowflake log"] commit from comment:56.
 I wasn't clear on whether that commit fixes something or whether it
 introduces its own race condition.

 Replying to [comment:55 cohosh]:
 > Now I'm back to the issues found in comment:49. The client successfully
 completes the rendezvous/signaling and then is failing to open the data
 channel (which causes the proxy to eventually time out and keep polling).
 Replying to [comment:56 cohosh]:
 > Okay it seems to be working fine for me now (with this patch).

 I'm not sure what the expected outcome is now. Is attachment:0001-Allow-
 gathering-of-candidates-to-generate-offer.patch only meant to fix the
 post-2.0.23 errors in pion-webrtc that manifested in comment:43 and
 comment:51 and bring us back to the status quo ante of comment:49? Or does
 it fix everything in your tests and allow a complete bootstrap? Or only
 with proxy-go, not with browser-based proxies?

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/28942#comment:57>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online

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