Re: v6ops-v6onbydefault: link-locals and AI_ADDRCONFIG

[itojun@iijlab.net]

>> > - there are really misbehaving DNS servers out there, which jeopardize 
>> >your IPv4 service if you query for AAAA's, and
>> 
>> 	this is a separate problem (this is not what AI_ADDRCONFIG cares
>> about).
>
>Yes, this is a separate problem .. but one that AI_ADDRCONFIG works around
>for the vast majority of nodes which could be dual-stack, but without IPv6
>connectivity.  So, in that sense, IMHO AI_ADDRCONFIG helps the situation
>*a lot*, but of course we still have to fix the problem for those 
>dual-stack nodes that do, in fact, have IPv6 connectivity.
>
>Remember, the most important thing we should care about is that dual-stack 
>deployments can get more common without causing problems for *IPv4* or 
>services in general.  AI_ADDRCONFIG is one step in that direction.

	for your story to be effective it has to be host-wide configuration
	knob, not a parameter to library function.  (we cannot change every
	program we use to have AI_ADDRCONFIG)

	and we (*BSD groups) ship programs without AI_ADDRCONFIG, and they
	work just fine...

itojun