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Date: Mon, 19 Jul 2021 23:07:21 +0200
From: "Olivier A." <olivier.antoine@...il.com>
To: musl@...ts.openwall.com
Subject: Re: getaddrinfo() fails for domains with no AAAA records
(regression?)
On 19/07/2021 14:58, Yuri Kanivetsky wrote:
> [..]
Hi,
I notice that too. If both A and AAAA are sent and there is a response
for A and NXDomain for AAAA
musl-libc discard both results. It's the expected behaviour according to
this commit:
https://git.musl-libc.org/cgit/musl/commit/src/network/lookup_name.c?id=5cf1ac2443ad0dba263559a3fe043d929e0e5c4c
And it conform to https://datatracker.ietf.org/doc/html/rfc8020
It's was not the case before Alpine-Linux 3.13
But I also notice that if the DNS reply ServFailed instead of NXDomain
for AAAA request, musl-libc retry 10 times, return 'bad address' and do
not fallback to return a A record.
According to https://datatracker.ietf.org/doc/html/rfc4074#section-4.3
it's not expected.
Yours,
--
Olivier Antoine
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