[tor-bugs] #13718 [Tor]: Reachability Tests aren't conducted if there are no exit nodes

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#13718: Reachability Tests aren't conducted if there are no exit nodes
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     Reporter:  tom     |      Owner:  teor
         Type:  defect  |     Status:  assigned
     Priority:  normal  |  Milestone:  Tor: 0.2.???
    Component:  Tor     |    Version:  Tor: 0.2.6.1-alpha
   Resolution:          |   Keywords:  tor-relay test-network lorax chutney
Actual Points:          |  Parent ID:
       Points:          |
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Comment (by arma):

 Replying to [comment:15 arma]:
 > Replying to [comment:4 teor]:
 > > I believe that an appropriate fix for this issue is to extend
 `router_have_minimum_dir_info` to take a parameter `dir_info_purpose`
 indicating what the dir info would be used for. (Or, perhaps, a set of
 flags for guard/middle/exit. Have to look into this.)
 >
 > Another simpler hack might be to say that you don't have to think about
 whether you know about enough exits if there aren't any exits in the
 consensus you have.

 In particular, I worry about the case where the guard knows what info the
 client has gotten, and sees the client start building circuits so it knows
 more about the purpose of these circuits.

 So there's still value imo in waiting for circuit-building until we have
 all the network info that we need for a variety of actions. The bug here
 is that we have the wrong definition of "all the network info that we
 need" when the network has no exits. So we should be fixing that
 definition.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/13718#comment:17>
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