[tor-bugs] #33157 [Circumvention/Snowflake]: Client generates SDP with "IN IP4 0.0.0.0", causing proxy to send "client_ip=0.0.0.0" and bridge to send "USERADDR 0.0.0.0:1"

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#33157: Client generates SDP with "IN IP4 0.0.0.0", causing proxy to send
"client_ip=0.0.0.0" and bridge to send "USERADDR 0.0.0.0:1"
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 Reporter:  dcf                      |          Owner:  (none)
     Type:  defect                   |         Status:  new
 Priority:  Medium                   |      Milestone:
Component:  Circumvention/Snowflake  |        Version:
 Severity:  Normal                   |     Resolution:
 Keywords:                           |  Actual Points:
Parent ID:                           |         Points:
 Reviewer:                           |        Sponsor:
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Comment (by cohosh):

 You know, we probably shouldn't even be using trickle ICE. The intended
 use case as I understand it is to allow peers to send candidates to each
 other continually rather than all at once (which we definitely don't do).
 Our original reason for using it was because it allowed us to keep using
 the `OnICEGatheringStateChange` callback [https://gitweb.torproject.org
 /pluggable-transports/snowflake.git/tree/client/lib/webrtc.go#n178 here]
 (see [https://trac.torproject.org/projects/tor/ticket/28942#comment:28
 #28942#comment:28]).

 I think it's worth revisiting that decision.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/33157#comment:2>
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