X-Recipient: archive-cygwin AT delorie DOT com
DomainKey-Signature: a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:date:from:to:subject:message-id:reply-to
	:references:mime-version:content-type:in-reply-to; q=dns; s=
	default; b=w480P1e+kFOsQ+bwCMYdBiNtrhaemXmuVZQdJwnaUXnjS1Xmy4ukH
	nPjLEmuv3T4BQdACevkFpozj5qqHQMgiPM6w14ObO1dvsFqr/9Jz1wJzDqujKvVF
	9Gnt/z38+a+LKqu1ZkIL5xdIAoSmCgWMPwtQy3ugyrHbhenI2TEmqw=
DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:date:from:to:subject:message-id:reply-to
	:references:mime-version:content-type:in-reply-to; s=default;
	 bh=qAyKmKX44odvERr3rpJzq9ZZgDM=; b=j+UB+bEJIfXOqd96aS2qqZ0NXRVU
	QV0VFnPKjIgB8wGRrH8Rt2MYkYLm8Ozm56OuwAIQUzDc2Wtkj7SvHnPXGgOY5gqG
	rQp8PnSnB32pjT0/T+17mClwTU6wMudJVLuZyCOYcc3TVO4LkaxwLqhrcHKiiCQm
	4JiO6reOBLcbN7U=
Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Id: <cygwin.cygwin.com>
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sourceware.org/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Delivered-To: mailing list cygwin AT cygwin DOT com
Authentication-Results: sourceware.org; auth=none
X-Virus-Found: No
X-Spam-SWARE-Status: No, score=-93.9 required=5.0 tests=BAYES_50,KAM_LAZY_DOMAIN_SECURITY,RCVD_IN_PBL,RDNS_DYNAMIC,USER_IN_WHITELIST autolearn=no version=3.3.2 spammy=vista, Vista, HX-Envelope-From:sk:corinna, Jun-ya
X-HELO: calimero.vinschen.de
Date: Mon, 14 Mar 2016 10:54:59 +0100
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: Cygwin unable to resolve hostnames
Message-ID: <20160314095459.GA20256@calimero.vinschen.de>
Reply-To: cygwin AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
References: <CAA05WiaqKoaRuxTCYmrqOquSPGVO+jO0gLLVhcX1L7N0Tr+hLg AT mail DOT gmail DOT com> <loom DOT 20160216T094912-392 AT post DOT gmane DOT org> <CAA05WiY_gwrX=aX2FqzLF0ZeJ4zf0ipNRshCXxOvp+h9MmbENQ AT mail DOT gmail DOT com> <20160314 DOT 093450 DOT 1409197428128437086 DOT kato AT vanilla DOT ocn DOT ne DOT jp>
MIME-Version: 1.0
Content-Type: multipart/signed; micalg=pgp-sha256;	protocol="application/pgp-signature"; boundary="zYM0uCDKw75PZbzx"
Content-Disposition: inline
In-Reply-To: <20160314.093450.1409197428128437086.kato@vanilla.ocn.ne.jp>
User-Agent: Mutt/1.5.24 (2015-08-30)

--zYM0uCDKw75PZbzx
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable

On Mar 14 09:34, Jun-ya Kato wrote:
> It also depends on AAAA query againt VMware's DNS proxy server.
>=20
> For more analysis, see vmware community site,
> https://communities.vmware.com/thread/518949?start=3D15&tstart=3D0
>=20
>=20
> I think it is not cygwin's bug at all. but any workaround may be
> implemented againt weak behavior of GetAddrInfoW() API.

As mentioned in the above posting, Cygwin always sets AI_ALL if
ai_family is PF_UNSPEC and the hints don't specify AI_ADDRCONFIG.

Apparently Winsock's GetAddrInfoW chokes on AI_ALL in certain
circumstances.  On GLibc, AI_ALL is ignored if AI_V4MAPPED is not given,
but that's not as I observed it on Windows when I added this code
(back in Vista times, but hey).

There's an easy workaround possible:  If GetAddrInfoW returns the
error code WSANO_RECOVERY (per the above posting), we can retry
without the AI_ALL flag.

Is anybody here affected by this problem willing to give this a test?
I can create another Cygwin 2.5.0 test release pretty soon...


Thanks,
Corinna

--=20
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

--zYM0uCDKw75PZbzx
Content-Type: application/pgp-signature; name="signature.asc"

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2
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=npYU
-----END PGP SIGNATURE-----

--zYM0uCDKw75PZbzx--