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Commit 972d1cb1 authored by Patrick McHardy's avatar Patrick McHardy Committed by David S. Miller
Browse files

[NETFILTER]: Add helper functions for mass hook registration/unregistration 



Signed-off-by: default avatarPatrick McHardy <kaber@trash.net>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 137dc023

include/linux/netfilter.h

+2 −0
Original line number Diff line number Diff line
@@ -110,6 +110,8 @@ struct nf_info 
/* Function to register/unregister hook points. */

int nf_register_hook(struct nf_hook_ops *reg);

void nf_unregister_hook(struct nf_hook_ops *reg);

int nf_register_hooks(struct nf_hook_ops *reg, unsigned int n);

void nf_unregister_hooks(struct nf_hook_ops *reg, unsigned int n);



/* Functions to register get/setsockopt ranges (non-inclusive).  You

   need to check permissions yourself! */

net/netfilter/core.c

+28 −0
Original line number Diff line number Diff line
@@ -63,6 +63,34 @@ void nf_unregister_hook(struct nf_hook_ops *reg) 
}

EXPORT_SYMBOL(nf_unregister_hook);



int nf_register_hooks(struct nf_hook_ops *reg, unsigned int n)

{

	unsigned int i;

	int err = 0;



	for (i = 0; i < n; i++) {

		err = nf_register_hook(&reg[i]);

		if (err)

			goto err;

	}

	return err;



err:

	if (i > 0)

		nf_unregister_hooks(reg, i);

	return err;

}

EXPORT_SYMBOL(nf_register_hooks);



void nf_unregister_hooks(struct nf_hook_ops *reg, unsigned int n)

{

	unsigned int i;



	for (i = 0; i < n; i++)

		nf_unregister_hook(&reg[i]);

}

EXPORT_SYMBOL(nf_unregister_hooks);



unsigned int nf_iterate(struct list_head *head,

			struct sk_buff **skb,

			int hook,