Re: register an hook

[Nicola Padovano <nicola.padovano@gmail.com>]

what's the difference? what is a target?
I'm analyzing the tarpit patch
(http://enterprise.bih.harvard.edu/pub/tarpit-updates/tarpit-2.6.29.patch)
and i've found only the registration of that target. and so, how it
works, if there isn't an hook registration?

help me, please :(


On Fri, Apr 23, 2010 at 12:27 PM, Jan Engelhardt <jengelh@medozas.de> wrote:
> On Friday 2010-04-23 10:55, Nicola Padovano wrote:
>
>>hi all.
>>i've read how to register an hook in netfilter. and i found two ways.
>>
>>the first uses, this routines:
>>
>>
>> unsigned int my_hook(unsigned int hooknum,
>>                      struct sk_buff *skb,
>>                      const struct net_device *in,
>>                      const struct net_device *out,
>>                      int (*okfn)(struct sk_buff *))
>> {
>> }
>>
>>int nf_register_hook(struct nf_hook_ops *reg)
>>int nf_unregister_hook(struct nf_hook_ops *reg)
>>
>>the second instead:
>>
>>static unsigned int xt_tarpit_target(struct sk_buff *skb,
>>                                    const struct xt_target_param *par)
>>
>>and:
>>xt_register_target(&xt_tarpit_reg);
>>xt_unregister_target(&xt_tarpit_reg);
>>
>>
>>which is the difference?
>
> That a target is not a hook.
>



-- 
Nicola Padovano
e-mail: nicola.padovano@gmail.com
web: http://npadov.blogspot.com/
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