[tor-bugs] #5547 [Tor Relay]: Add support for resolving destination names to IPv6 and exiting to IPv6 destinations

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#5547: Add support for resolving destination names to IPv6 and exiting to IPv6
destinations
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 Reporter:  karsten    |          Owner:                             
     Type:  project    |         Status:  new                        
 Priority:  normal     |      Milestone:  Sponsor F: November 1, 2012
Component:  Tor Relay  |        Version:                             
 Keywords:             |         Parent:                             
   Points:             |   Actualpoints:                             
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 Item 24 from [wiki:org/sponsors/SponsorF/Year2] is: "Support for resolving
 destination names to IPv6 and exiting to IPv6 destinations."

 Summarizing
 [https://gitweb.torproject.org/torspec.git/blob/HEAD:/proposals/ideas/xxx-
 ipv6-roadmap.txt#l143 phase 5 of the IPv6 roadmap], this deliverable
 consists of the following substeps:

  - We'll need to get our DNS resolver to support IPv6 addresses, and our
 clients to decide which address to report to the client and which to use.

  - Transport IPv6 traffic and exit to IPv6 servers.  The issues to solve
 here are exit policies; formulating an approach similar to the notion of
 topologically close in IPv4 (same /16) to IPv6, unless it doesn't make
 sense; and implementing the specified enhancements to RELAY_BEGIN cells
 from tor-spec.

  - We need to extend TorDNSEL/TorBEL and the part of ExoneraTor that
 processes the TorDNSEL/TorBEL output.

  - We also need to update VisiTor to handle IPv6 addresses in web server
 logs and compare them to exit lists.  (There are zero known VisiTor users,
 so this should be considered optional.)

 Anything else we need to do here?

 Scheduling this ticket for November, not for July, because we'll be busy
 making clients talk to private and public bridges (phases 3 and 4 of the
 IPv4 roadmap) until
 [https://trac.torproject.org/projects/tor/wiki/org/sponsors/SponsorG#Phase3:June302012
 June].

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/5547>
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