[tor-bugs] #19810 [Core Tor/Tor]: Could high-bandwidth ORPort-only relays be fallbacks?

Tor Bug Tracker & Wiki blackhole at torproject.org
Wed Aug 3 00:41:57 UTC 2016


#19810: Could high-bandwidth ORPort-only relays be fallbacks?
------------------------------+------------------------------
     Reporter:  teor          |      Owner:
         Type:  enhancement   |     Status:  new
     Priority:  Medium        |  Milestone:  Tor: unspecified
    Component:  Core Tor/Tor  |    Version:
     Severity:  Normal        |   Keywords:  fallback
Actual Points:                |  Parent ID:
       Points:  2             |   Reviewer:
      Sponsor:                |
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 In 0.2.8, relays automatically support begindir over ORPort, even if they
 don't have a DirPort.

 I wonder if we're missing out on (m)any high-bandwidth relays by excluding
 relays without a DirPort. That said, we wouldn't want too many, because
 relays still use the DirPort to bootstrap off fallbacks. (But if the
 fallback only has an ORPort, the relay will use that.)

 We'd need to make the following changes for this to happen:
 * modify the DirPort requirement during fallback selection to check for
 either a DirPort, or declared begindir support in the descriptor
 * make a DirPort optional for configured FallbackDirs in Tor
   * this may be as simple as setting the DirPort to 0, and disabling the
 validation. The rest of the code might just work, because it ignores 0
 DirPorts
 * test, test, test

--
Ticket URL: <https://troodi.torproject.org/projects/tor/ticket/19810>
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