[tor-bugs] #2799 [Tor Hidden Services]: Use cbt results when deciding to launch parallel introduction circuit?

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#2799: Use cbt results when deciding to launch parallel introduction circuit?
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 Reporter:  nickm                |          Owner:                    
     Type:  defect               |         Status:  new               
 Priority:  normal               |      Milestone:  Tor: 0.2.2.x-final
Component:  Tor Hidden Services  |        Version:                    
 Keywords:                       |         Parent:                    
   Points:                       |   Actualpoints:                    
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 Right now, circuituse.c has this lovely snippet in circuit_get_best:

 {{{

 /* XXX022 make this 15 be a function of circuit finishing times we've
  * seen lately, a la Fallon Chen's GSoC work -RD */
 #define REND_PARALLEL_INTRO_DELAY 15
     if (purpose == CIRCUIT_PURPOSE_C_INTRODUCE_ACK_WAIT &&
              !must_be_open && circ->state != CIRCUIT_STATE_OPEN &&
              circ->timestamp_created + REND_PARALLEL_INTRO_DELAY < now) {
       intro_going_on_but_too_old = 1;
       continue;
     }
 }}}

 Now that we've got our circ_times stuff, we can totally get a better
 estimate of "that time after which we should launch another introduction
 circuit but still give this one time to finish."  Yes?

 Parenthetically, I have no idea what "!must_be_open" is doing there.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/2799>
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