netdev - Re: [RFC] netfilter: WIP: Xtables idletimer target implementation

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Date:	Tue, 1 Jun 2010 20:38:29 +0200 (CEST)
From:	Jan Engelhardt <jengelh@...ozas.de>
To:	Luciano Coelho <luciano.coelho@...ia.com>
cc:	ext Patrick McHardy <kaber@...sh.net>,
	"netfilter-devel@...r.kernel.org" <netfilter-devel@...r.kernel.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	Timo Teras <timo.teras@....fi>
Subject: Re: [RFC] netfilter: WIP: Xtables idletimer target implementation


On Tuesday 2010-06-01 20:33, Luciano Coelho wrote:
>On Mon, 2010-05-31 at 21:51 +0200, ext Jan Engelhardt wrote:
>> On Monday 2010-05-31 21:12, Luciano Coelho wrote:
>> >
>> >I considered this option, but then I didn't find a proper place where to
>> >include the attribute in sysfs, since I cannot add it as part of the
>> >interface (eg. /sys/class/net/wlan0/idletimer) as I was doing before.
>> 
>> You couldn't have done that before either, because the interface name
>> in ipt_ip may refer to an interface that does not exist at all times.
>> 
>> >The other option would be to make the idletimer as part of the
>> >xt_IDLETIMER module object in sysfs
>> >(ie. /sys/module/xt_IDLETIMER/<user_supplied_name>), but it looks out of
>> >place.
>> 
>> I like it. It follows /proc/net/xt_{hashlimit,recent}/<user_supplied_name>.
>
>I'm starting to like this more and more too, as my code is getting much
>smaller ;)
>
>One quick question, though.  Do you have any ideas on how I can make
>sure that the user doesn't supply the same name twice (ie. two rules
>with the same user_supplied_name)?

What's so bad about multiple rules being able to reset the timer?

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