[tor-bugs] #7193 [Tor]: Tor's sybil protection doesn't consider IPv6

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#7193: Tor's sybil protection doesn't consider IPv6
---------------------------+------------------------------------------------
 Reporter:  asn            |          Owner:                    
     Type:  defect         |         Status:  new               
 Priority:  normal         |      Milestone:  Tor: 0.2.3.x-final
Component:  Tor            |        Version:                    
 Keywords:  ipv6 tor-auth  |         Parent:                    
   Points:                 |   Actualpoints:                    
---------------------------+------------------------------------------------
 Some bugs:

 `get_possible_sybil_list()` doesn't consider IPv6 addresses at all.

 `clear_status_flags_on_sybil()` doesn't clear `ipv6_addr` (and maybe more
 flags).

 Also, maybe we could add a `log_notice` or `log_info` to mention if and
 which relays were found to be part of a Sybil attack.

 Finally (and this is a minor bug), in `get_possible_sybil_list()` we
 assume that `max_with_same_addr < max_with_same_addr_on_authority`, which
 is true in the current tor network, but maybe it shouldn't be an inherent
 property of the source code.

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/7193>
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