[tor-bugs] #18489 [Tor]: Fallback directories don't serve extrainfo descriptors

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#18489: Fallback directories don't serve extrainfo descriptors
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 Reporter:  atagar  |          Owner:
     Type:  defect  |         Status:  new
 Priority:  Medium  |      Milestone:
Component:  Tor     |        Version:
 Severity:  Normal  |     Resolution:
 Keywords:          |  Actual Points:
Parent ID:          |         Points:
  Sponsor:          |
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Comment (by teor):

 Replying to [comment:3 arma]:
 > Replying to [comment:1 arma]:
 > > And also there is not currently any way to communicate in your
 descriptor/etc that you are happy to answer them?
 >
 > Ah, there is one of those. See "caches-extra-info".
 >
 > And from there, see router_supports_extrainfo(), plus the places that
 call it.

 The code that picks authorities and fallback directories uses the same
 function, so it looks like there are some missing flag checks.

 (We plan on unifying the code that picks authorities / fallback
 directories and the code that picks directory mirrors. If we'd managed
 that in 0.2.8, then these checks would be consistent, and hopefully
 correct - I assume they're being performed correctly for directory
 mirrors.)

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/18489#comment:4>
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