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

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#13718: `
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     Reporter:  tom     |      Owner:  teor
         Type:  defect  |     Status:  assigned
     Priority:  normal  |  Milestone:  Tor: 0.2.???
    Component:  Tor     |    Version:
   Resolution:          |   Keywords:  tor-relay test-network lorax
Actual Points:          |  Parent ID:
       Points:          |
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Changes (by teor):

 * owner:   => teor
 * status:  new => assigned


Comment:

 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.)

 This short-circuits the chicken or egg issue by splitting the checks into
 internal and external. Internal can succeed, then activate conditions
 (exit ports), allowing external to succeed.

 (Alternately, we can force exits using the new TestingDirAuthVoteExit in
 tor 0.2.6, which works sometimes, but not always.)

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/13718#comment:4>
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