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

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Message-ID: <alpine.DEB.2.00.1101182144510.28424@blackhole.kfki.hu>
Date:	Tue, 18 Jan 2011 21:54:46 +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 21:37, Jozsef Kadlecsik wrote:
> >> >> 
> >> >> 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.
> 
> Is there a specific reason that there is no IPv6 net support?

Call it laziness: for IPv6, the hash:ip* types does *not* accept a 
range of elements to be added/deleted in one command, expressed as

ipset add foo6 20a1:1:2:3:4:5:6:7/120

or

ipset add foo6 20A1:1:2:3:4:5:6:0-20A1:1:2:3:4:5:6:FF

For IPv4 the syntax is accepted and handled.

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