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Re: [DNSOP] Introducing draft-vavrusa-dnsop-aaaa-for-free

"John Levine" <johnl@taugh.com> Sat, 26 March 2016 20:43 UTC

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Date: Sat, 26 Mar 2016 20:42:58 -0000
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From: John Levine <johnl@taugh.com>
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Subject: Re: [DNSOP] Introducing draft-vavrusa-dnsop-aaaa-for-free
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>The next step is experimentation, we wanted to see if the community thought
>this was a stupid idea before going forward.

I certainly don't think it's stupid.

>There are 3 possible outcomes when a DNS querier gets an aswer like this
>#1 It accepts everything from authority section
>#2 It tosses the non queried RRset
>#3 it Rejects the answer and tries again

#4 it ignores the answer and doesn't try again
#5 it misinterprets the AAAA records as A records (they're not CNAME, what else could they be?)
#6 it dereferences an uninitialized pointer and gets random junk sometimes, crashes other times

I don't think any of those are particularly likely, but I've never
sent answers with extra records other than CNAME, DNAME, and (when DO
is set) DNSSEC stuff.  So I think we agree that reports of what
current code really does would be helpful.

R's,
John

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