[tor-bugs] #32190 [Core Tor/Tor]: Send a control port event when a stream enters the controller_wait state

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#32190: Send a control port event when a stream enters the controller_wait state
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     Reporter:  irl           |      Owner:  (none)
         Type:  enhancement   |     Status:  new
     Priority:  Medium        |  Milestone:
    Component:  Core Tor/Tor  |    Version:
     Severity:  Normal        |   Keywords:
Actual Points:                |  Parent ID:
       Points:                |   Reviewer:
      Sponsor:                |
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 Currently the only way to find out whether a stream was waiting for you to
 attach it is to try to attach it, and then if you get a 555 error back
 then you know it wasn't waiting for you.

 The control protocol could be extended to let controllers know when a
 stream is ready for the controller to attach it.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/32190>
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