netdev - Re: regression when connecting to ipv6 localhost

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Date:	Mon, 15 Oct 2012 14:31:48 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Joe Perches <joe@...ches.com>
Cc:	Jan Hinnerk Stosch <janhinnerk.stosch@...il.com>,
	netdev@...r.kernel.org
Subject: Re: regression when connecting to ipv6 localhost

On Mon, 2012-10-15 at 04:25 -0700, Joe Perches wrote:

> 
> It looks more like a recently introduced app defect though.
> 

> Jan's using a newer version of ntp than you are.
> https://bugs.archlinux.org/task/31775
> ntp 4.2.6.p5-11

> Perhaps the defect was introduced in the ntp code with
> this change:
> 
> http://bk.ntp.org/ntp-stable/lib/isc/unix/interfaceiter.c?PAGE=diffs&REV=4e12bf8dJoMBgRoYzI9851nTqVBhgQ


It seems you missed fact that /proc/net/if_inet6 doesnt include lo
device for Jan machine.

Even an old ntpd (or ifconfig -a) wont see lo device ::1 address if not
listed in /proc/net/if_inet6

"ip -6 addr" doesnt parse /proc/net/if_inet6



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