[tor-bugs] #16774 [Tor]: Add fallback directories to GETINFO

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#16774: Add fallback directories to GETINFO
-------------------------------------+------------------------------------
 Reporter:  teor                     |          Owner:
     Type:  enhancement              |         Status:  needs_revision
 Priority:  Medium                   |      Milestone:  Tor: 0.2.8.x-final
Component:  Tor                      |        Version:  Tor: 0.2.7.2-alpha
 Severity:  Normal                   |     Resolution:
 Keywords:  lorax, easy, 028-triage  |  Actual Points:
Parent ID:  #17817                   |         Points:  medium
  Sponsor:                           |
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Changes (by teor):

 * status:  needs_review => needs_revision


Comment:

 Replying to [comment:12 gtank]:
 > I like the file-scope approach, and think it also takes care of #17817
 (assuming the ipv6 flags are in the included data). It also has the nice
 side-effect of treating fallbacks identically to dirauths in the config
 handler. I've written it up at `feature16774-v3` at
 https://github.com/gtank/tor.git

 Thanks for this patch, looks good!

 One minor fix - Tor doesn't use the default fallback directories if
 get_options()->UseDefaultFallbackDirs is 0. To avoid confusing users,
 let's only display the default fallbacks if there are no FallbackDir lines
 in the config, and get_options()->UseDefaultFallbackDirs is 1.

 {{{
     if (fallback_lines_seen == 0) {
 }}}

 Also, the fallback directories aren't authoritative, they are mirrors. Can
 you change default_fallback_authorities to avoid using `authorities`?

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/16774#comment:14>
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