Re: [PATCH] iptables: use skb->len for accounting

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Le vendredi 23 juillet 2010 à 14:47 +0800, Changli Gao a écrit :
> On Fri, Jul 23, 2010 at 2:29 PM, Eric Dumazet <eric.dumazet@xxxxxxxxx> wrote:
> > Le vendredi 23 juillet 2010 à 11:34 +0800, Changli Gao a écrit :
> >> iptables: use skb->len for accounting
> >>
> >> use skb->len for accounting as xt_quota does.
> >>
> >
> > Why ?
> >
> > This is a gratuitous change, unless you have very strong arguments.
> >
> > xt_quota is an exception, dont change all others because of it !
> 
> exception ? Why ?

Because it handles all protocols...

So skb->len is a shortcut, an approximation if you want.

At IPV4 level, ip->tot_len is an exact value.



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