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From: "Olivier A." <olivier.antoine@gmail.com>
To: musl@lists.openwall.com
Subject: Re: [musl] getaddrinfo() fails for domains with no AAAA records (regression?)
Date: Mon, 19 Jul 2021 23:07:21 +0200	[thread overview]
Message-ID: <5463e48e-c6b7-f6e3-e405-6cf654b35c57@gmail.com> (raw)
In-Reply-To: <CAMhVC3bmXRW0WBnJNgVN66vHfLr-oz0PkWTOa9tiqTtJkMXbtQ@mail.gmail.com>

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


  parent reply	other threads:[~2021-07-19 21:07 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-19 12:58 Yuri Kanivetsky
2021-07-19 13:22 ` Florian Weimer
2021-07-19 18:51   ` Yuri Kanivetsky
2021-07-19 19:29     ` Shiz
2021-07-19 19:47     ` Érico Nogueira
2021-07-19 21:08   ` Rich Felker
2021-07-19 21:07 ` Olivier A. [this message]
2021-07-19 21:12   ` Rich Felker
2021-07-23 20:25     ` Yuri Kanivetsky
2021-07-23 20:33       ` Yuri Kanivetsky
2021-07-23 20:45       ` Laurent Bercot
2021-07-27 14:21         ` Yuri Kanivetsky
2021-07-27 14:41           ` Rich Felker

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