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

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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)?

The problem is that the userspace always re-adds all the existing rules
before inserting a new one and only later deletes the old rules. :\


-- 
Cheers,
Luca.

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