netdev - Re: regression when connecting to ipv6 localhost

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Date:	Mon, 15 Oct 2012 15:10:31 +0200
From:	Jan Hinnerk Stosch <janhinnerk.stosch@...il.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Joe Perches <joe@...ches.com>, netdev@...r.kernel.org
Subject: Re: regression when connecting to ipv6 localhost

2012/10/15 Eric Dumazet <eric.dumazet@...il.com>:
> 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
>

Now I can confirm, that the file contains no loopback interface.
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