[tor-bugs] #4455 [Tor Client]: Add configuration option PreferIPv6?

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#4455: Add configuration option PreferIPv6?
---------------------------+------------------------------------------------
    Reporter:  ln5         |       Owner:                  
        Type:  defect      |      Status:  reopened        
    Priority:  normal      |   Milestone:  Tor: unspecified
   Component:  Tor Client  |     Version:                  
  Resolution:              |    Keywords:  ipv6            
      Parent:  #4624       |      Points:                  
Actualpoints:              |  
---------------------------+------------------------------------------------

Comment(by ln5):

 I propose these for 0.2.4.1.

 {{{
 +**ClientUseIPv6** **0**|**1**::
 +    If this option is set to 1, Tor might connect to entry nodes over
 +    IPv6. Note that clients configured with an IPv6 address in a
 +    **Bridge** option will try connecting over IPv6 if even if
 +    **ClientUseIPv6** is set to 0. (Default: 0)
 +
 +**ClientPreferIPv6ORPort** **0**|**1**::
 +    If this option is set to 1, we prefer an OR port with an IPv6
 +    address over one with IPv4 if a given entry node has both. Other
 +    things may influence the choice. This option breaks a tie to the
 +    favor of IPv6. (Default: 0)
 +
 }}}

 We might want to make ClentUseIPv6 more strict, i.e. refuse to make
 any outgoing connections at all unless it's set. If so, should we make
 it default to 'auto' and let that translate to '1' if Tor is running
 with at least one IPv6 bridge, else '0'?

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/4455#comment:11>
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