[tor-bugs] #30382 [Core Tor/Tor]: Provide control port event for when we are missing v3 client auth for an onion

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#30382: Provide control port event for when we are missing v3 client auth for an
onion
--------------------------------------------+------------------------------
 Reporter:  asn                             |          Owner:  dgoulet
     Type:  defect                          |         Status:  accepted
 Priority:  Medium                          |      Milestone:  Tor:
                                            |  0.4.2.x-final
Component:  Core Tor/Tor                    |        Version:
 Severity:  Normal                          |     Resolution:
 Keywords:  tor-hs, tbb-usability, hs-auth  |  Actual Points:
Parent ID:  #14389                          |         Points:  6
 Reviewer:                                  |        Sponsor:
                                            |  Sponsor27-must
--------------------------------------------+------------------------------

Comment (by mcs):

 Replying to [comment:6 dgoulet]:
 > So, if I'm not mistaken, you will get a connect failure _before_ you get
 the control port event because tor will return the SOCKS failure before
 that control port "empty queue" event is triggered.

 That makes sense and is good to know. I asked because the technique used
 by Arthur's old v2 auth Torbutton patch from ticket:14389#comment:14
 relies on receiving the control port event before the browser receives a
 connection failure indication via SOCKS. Unfortunately, it seems like we
 are back to adding a new error code to SOCKS5 or figuring out how to
 switch the browser to use HTTP CONNECT (which is a large and risky task
 due to the complexity of Firefox's networking stack and how HTTP CONNECT
 was implemented there).

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/30382#comment:7>
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