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Re: Link-local IPv6 addresses in the DNS

Philip Homburg <pch-6man-1a@u-1.phicoh.com> Tue, 22 November 2011 16:35 UTC

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To: Mark Andrews <marka@isc.org>
Subject: Re: Link-local IPv6 addresses in the DNS
From: Philip Homburg <pch-6man-1a@u-1.phicoh.com>
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In-reply-to: Your message of "Tue, 22 Nov 2011 14:30:03 +1100 ." <20111122033003.B6D1817DF522@drugs.dv.isc.org>
Date: Tue, 22 Nov 2011 17:34:49 +0100
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Cc: Tomoyuki Sahara <sahara@surt.net>, 6man <ipv6@ietf.org>, Brian E Carpenter <brian.e.carpenter@gmail.com>, Kerry Lynn <kerlyn2001@gmail.com>
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In your letter dated Tue, 22 Nov 2011 14:30:03 +1100 you wrote:
>On a related issue to link locals in URI's, we don't currently have
>a good method of supporting link locals in the DNS.  Sure we can
>add them as AAAA records but they are essentially useless as the
>scope information is lost.  People keep saying use LL for disconnected
>but it just doesn't work without more support.

For disconnected operation, why not have getaddrinfo fill in the scope?
Just set it to the interface over which the DNS reply arrived. 

I have to admit that this may become a bit tricky if the DNS resolver is local
or if interface information is lost in some other way.

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