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

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#4455: Add configuration option PreferIPv6?
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 Reporter:  ln5         |          Owner:     
     Type:  defect      |         Status:  new
 Priority:  normal      |      Milestone:     
Component:  Tor Client  |        Version:     
 Keywords:              |         Parent:     
   Points:              |   Actualpoints:     
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Changes (by arma):

  * component:  - Select a component => Tor Client


Comment:

 Replying to [ticket:4455 ln5]:
 > One way would be to add an option PreferIPv6 0|1 (with a
 > default of 0).  Another way would be to prefer the one mentioned first
 > in the config file (if the information of the order of config lines
 > are kept after parsing the config file).

 I think from an interface perspective, we're going to go mad if we start
 trying to teach users that the order of bridges in the torrc file matters.
 (Remember that most users will be using Vidalia to configure their bridge
 list, and current Vidalia has no support for reordering bridges.)

 So I think a config option is a good plan here. That said, we should think
 harder about the name.

 First, we should try to look into the future and guess what related config
 options we'll want, and what we might name them. For example, PreferIPv6
 doesn't give any indication that we're talking about a client; what will
 multihomed relays want to say in their torrc if they have an ipv6 address
 available and want to instruct ambivalent clients to prefer it?

 Second, based on the name it sounds like the behavior will be "try all
 your ipv6 bridges first, and if none of them work fall back to your ipv4
 bridges". That's a fine behavior for many users. Will we have users who
 want "try all your ipv6 bridges, and if none of them work fail"? What
 lines will we expect those users to set in their torrc, and will they be
 confused by any of the other names of our new options?

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/4455#comment:1>
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