Re: [tor-bugs] #31385 [Circumvention/Snowflake]: Snowflake client fails after bootstrap

["Tor Bug Tracker & Wiki" <blackhole@xxxxxxxxxxxxxx>]

#31385: Snowflake client fails after bootstrap
-------------------------------------+-----------------------------
 Reporter:  cypherpunks              |          Owner:  cohosh
     Type:  defect                   |         Status:  merge_ready
 Priority:  Medium                   |      Milestone:
Component:  Circumvention/Snowflake  |        Version:
 Severity:  Normal                   |     Resolution:
 Keywords:                           |  Actual Points:
Parent ID:                           |         Points:
 Reviewer:                           |        Sponsor:
-------------------------------------+-----------------------------

Comment (by cohosh):

 Replying to [comment:20 arlolra]:
 > > Can someone review this ASAP and I'll push an update?
 >
 > Yeah, looks like this was the intention in `2521f4f`.
 >
 > Couple of notes, L89 in proxy/snowflake.js is redundant,
 >
 > {{{
 > if (pair.active) {
 >   ...
 > } else {
 >   return pair.active = false;
 > }
 > }}}
 >
 > Also, since the timeout sets up a race, maybe add a `this.active` check
 in `channel.onopen`.
 >
 Thanks! I added a fix for both of these comments to the same branch.
 > I guess this is another reason to tackle #31310
 Yeah. I think there's still some problems here caused by reusing proxy
 pairs (if the pair is reused the active check in onopen might pass even
 though it's meant for a different client), but this is probably okay in
 the short term especially since we have so few clients.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/31385#comment:21>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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