From: Rich Felker <dalias@aerifal.cx>
To: musl@lists.openwall.com
Subject: Re: IPv4 and IPv6 addresses in resolv.conf
Date: Fri, 29 Nov 2013 22:59:13 -0500 [thread overview]
Message-ID: <20131130035912.GP24286@brightrain.aerifal.cx> (raw)
In-Reply-To: <20131130035116.GO24286@brightrain.aerifal.cx>
On Fri, Nov 29, 2013 at 10:51:16PM -0500, Rich Felker wrote:
> On Fri, Nov 29, 2013 at 10:45:26PM -0500, Strake wrote:
> > On 29/11/2013, Rich Felker <dalias@aerifal.cx> wrote:
> > > But that would mean complete unconditional DNS failure on systems
> > > lacking IPv6.
> >
> > We could do so iff system has IPv6. Switching on whether system has
> > IPv6 rather than whether resolv.conf has any IPv6 nameservers means
> > * no check whether resolv.conf includes v6 server
> > * that adding a v6 server to resolv.conf can not break DNS even on
> > systems lacking v6
> > which seems saner.
>
> OK, so how do we detect if the system "has IPv6"? I don't think it's
BTW, short of an answer to this question, I think the approach I
already suggested is rather safe. I can't imagine how an IPv6
nameserver address would end up in resolv.conf on a system completely
lacking IPv6 support at the kernel level.
Rich
next prev parent reply other threads:[~2013-11-30 3:59 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-29 10:09 orc
2013-11-29 17:44 ` Rich Felker
2013-11-30 0:37 ` Rich Felker
2013-11-30 1:18 ` Strake
2013-11-30 3:17 ` Rich Felker
2013-11-30 3:45 ` Strake
2013-11-30 3:51 ` Rich Felker
2013-11-30 3:59 ` Rich Felker [this message]
2013-11-30 9:16 ` Justin Cormack
2013-11-30 17:01 ` Rich Felker
2013-11-30 17:23 ` Justin Cormack
2013-11-30 17:30 ` Rich Felker
2013-11-30 17:33 ` Rob
2013-11-30 17:42 ` Rich Felker
2013-11-30 17:43 ` Justin Cormack
2013-11-30 18:52 ` Rich Felker
2013-11-30 9:13 ` Laurent Bercot
2013-11-30 10:18 ` John Spencer
2013-11-30 16:53 ` Rich Felker
2013-11-30 15:27 ` orc
2013-12-03 2:11 ` Rich Felker
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