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Re: [v6ops] An Update to Happy Eyeballs

Stuart Cheshire <cheshire@apple.com> Fri, 17 March 2017 23:45 UTC

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From: Stuart Cheshire <cheshire@apple.com>
In-reply-to: <CAJE_bqedC9ou-0ejwLveFsMrOVEYTKGTKCkw8HpY5OjXEKqLLQ@mail.gmail.com>
Date: Fri, 17 Mar 2017 16:46:35 -0700
Cc: IPv6 Operations <v6ops@ietf.org>
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To: 神明達哉 <jinmei@wide.ad.jp>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/ZcgwevdHrB5wfkHWMFh2Vy634gc>
Subject: Re: [v6ops] An Update to Happy Eyeballs
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On 17 Mar 2017, at 14:22, 神明達哉 <jinmei@wide.ad.jp> wrote:

> I guess there's something (undocumented yet and) very specific to the
> Apple implementation details of the "asynchronous model", then.  In
> the above example steps, we've received an answer to both AAAA and A
> queries at step 5.  Whether the resolution is asynchronous or
> synchronous, why can't we "tell the DNS engine to stop"?  Does the
> "DNS engine" still expect more responses even after getting both AAAA
> and A responses?  Perhaps it keeps sending the same queries to see
> whether there's a change?  At least it's not clear to me from Section
> 3 of the draft.

If you want to learn more about this, the asynchronous model is explained in “Zero Configuration Networking: The Definitive Guide”

<https://www.amazon.com/Zero-Configuration-Networking-Definitive-Guide-ebook/dp/B0043M4Z9I/>

If you’re going to be in Chicago for IETF 98 I can bring a copy for you.

Stuart Cheshire

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