[tor-bugs] #24338 [Core Tor/Tor]: DirAuths that have IPv6 addresses don't include them in their vote on themself

[Tor Bug Tracker & Wiki]

#24338: DirAuths that have IPv6 addresses don't include them in their vote on
themself
-------------------------------------------------+-------------------------
 Reporter:  tom                                  |          Owner:  (none)
     Type:  defect                               |         Status:  new
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  0.3.3.x-final
Component:  Core Tor/Tor                         |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  needs-mandatory-IPv6, tor-dirauth,   |  Actual Points:
  easy, intro                                    |
Parent ID:                                       |         Points:  1
 Reviewer:                                       |        Sponsor:
-------------------------------------------------+-------------------------
Changes (by teor):

 * parent:  #20916 =>
 * milestone:  Tor: very long term => Tor: 0.3.3.x-final


Comment:

 Hang on, we will need authorities to unconditionally advertise their own
 IPv6 address.

 When we implement relay IPv6 reachability checks, relays in a new network
 will need IPv6 addresses to bootstrap off.

 > If an authority votes for its own IPv6 address, and it's the only one to
 do this, then its IPv6 address will always be in the consensus, even if
 it's actually unreachable. (A single IPv6-voting authority can determine
 an IPv6 address by voting for it.)

 This is ok, because if we have a majority of authorities on IPv6 (that
 doesn't include that authority), that authority won't be marked Running,
 and its operator will notice.

 Also, we should do reachability checks on authority IPv6 addresses, but
 just warn if they fail. This is what we do for authority IPv4 addresses.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/24338#comment:4>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online