netdev - Re: [patch 2/4] ipset: make IPv4 and IPv6 address handling similar

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Date:	Tue, 18 Jan 2011 21:37:06 +0100 (CET)
From:	Jozsef Kadlecsik <kadlec@...ckhole.kfki.hu>
To:	Jan Engelhardt <jengelh@...ozas.de>
cc:	holger@...zenberger.org, netfilter-devel@...r.kernel.org,
	netdev@...r.kernel.org
Subject: Re: [patch 2/4] ipset: make IPv4 and IPv6 address handling similar

On Tue, 18 Jan 2011, Jan Engelhardt wrote:

> On Tuesday 2011-01-18 21:18, Jozsef Kadlecsik wrote:
> >On Tue, 18 Jan 2011, holger@...zenberger.org wrote:
> >
> >> While the following works for AF_INET:
> >> 
> >>  ipset add foo 192.168.1.1/32
> >> 
> >> this does not work for AF_INET6:
> >> 
> >>  ipset add foo6 20a1:1:2:3:4:5:6:7/128
> >>  ipset v5.2: Syntax error: plain IP address must be supplied: 20a1:1:2:3:4:5:6:7/128
> >
> >Yeah, the usual issue: should IPv4/32 and IPv6/128 be handled as a plain 
> >IPv4/v6 address when the manual says "enter a plain IPv4/v6 address" :-).
> 
> (Assuming this was a question, heuristically based on the word order
> you used:) I don't think so. iptables, resp. its modules, do not
> allow that either.

I know, but the situation is a little bit more complicated: the set type 
in question works differently with IPv4 and IPv6. In the IPv4 case, a 
range of IP addresses as IPv4/prefix is accepted as input (thus 
192.168.1.1/32 too), while for IPv6, only plain IPv6 addresses are allowed 
and therefore 20a1:1:2:3:4:5:6:7/128 was rejected.

That looks really odd so I added the feature (but could not resist to add 
my comment as a pseudo-question :-).

Best regards,
Jozsef
-
E-mail  : kadlec@...ckhole.kfki.hu, kadlec@...l.kfki.hu
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