Release 4.14 net/bridge/netfilter/ebtable_filter.c

/*
 *  ebtable_filter
 *
 *      Authors:
 *      Bart De Schuymer <bdschuym@pandora.be>
 *
 *  April, 2002
 *
 */

#include <linux/netfilter_bridge/ebtables.h>
#include <linux/module.h>


#define FILTER_VALID_HOOKS ((1 << NF_BR_LOCAL_IN) | (1 << NF_BR_FORWARD) | \
                            (1 << NF_BR_LOCAL_OUT))


static struct ebt_entries initial_chains[] = {
	{
		.name	= "INPUT",
		.policy	= EBT_ACCEPT,
        },
	{
		.name	= "FORWARD",
		.policy	= EBT_ACCEPT,
        },
	{
		.name	= "OUTPUT",
		.policy	= EBT_ACCEPT,
        },
};


static struct ebt_replace_kernel initial_table = {
	.name		= "filter",
	.valid_hooks	= FILTER_VALID_HOOKS,
	.entries_size	= 3 * sizeof(struct ebt_entries),
	.hook_entry	= {
		[NF_BR_LOCAL_IN]	= &initial_chains[0],
		[NF_BR_FORWARD]		= &initial_chains[1],
		[NF_BR_LOCAL_OUT]	= &initial_chains[2],
        },
	.entries	= (char *)initial_chains,
};



static int check(const struct ebt_table_info *info, unsigned int valid_hooks)
{
	if (valid_hooks & ~FILTER_VALID_HOOKS)
		return -EINVAL;
	return 0;
}

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Bart De Schuymer
30
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1
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static const struct ebt_table frame_filter = {
	.name		= "filter",
	.table		= &initial_table,
	.valid_hooks	= FILTER_VALID_HOOKS,
	.check		= check,
	.me		= THIS_MODULE,
};


static unsigned int

ebt_in_hook(void *priv, struct sk_buff *skb,
	    const struct nf_hook_state *state)
{
	return ebt_do_table(skb, state, state->net->xt.frame_filter);
}

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Alexey Dobriyan
29
76.32%
2
33.33%
David S. Miller
5
13.16%
1
16.67%
Eric W. Biedermann
3
7.89%
2
33.33%
Patrick McHardy
1
2.63%
1
16.67%
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38
100.00%
6
100.00%


static unsigned int

ebt_out_hook(void *priv, struct sk_buff *skb,
	     const struct nf_hook_state *state)
{
	return ebt_do_table(skb, state, state->net->xt.frame_filter);
}

Contributors
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Bart De Schuymer
23
60.53%
1
14.29%
David S. Miller
5
13.16%
1
14.29%
Alexey Dobriyan
4
10.53%
1
14.29%
Eric W. Biedermann
3
7.89%
2
28.57%
Herbert Xu
2
5.26%
1
14.29%
Patrick McHardy
1
2.63%
1
14.29%
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38
100.00%
7
100.00%


static const struct nf_hook_ops ebt_ops_filter[] = {
	{
		.hook		= ebt_in_hook,
		.pf		= NFPROTO_BRIDGE,
		.hooknum	= NF_BR_LOCAL_IN,
		.priority	= NF_BR_PRI_FILTER_BRIDGED,
        },
	{
		.hook		= ebt_in_hook,
		.pf		= NFPROTO_BRIDGE,
		.hooknum	= NF_BR_FORWARD,
		.priority	= NF_BR_PRI_FILTER_BRIDGED,
        },
	{
		.hook		= ebt_out_hook,
		.pf		= NFPROTO_BRIDGE,
		.hooknum	= NF_BR_LOCAL_OUT,
		.priority	= NF_BR_PRI_FILTER_OTHER,
        },
};



static int __net_init frame_filter_net_init(struct net *net)
{
	return ebt_register_table(net, &frame_filter, ebt_ops_filter,
				  &net->xt.frame_filter);
}

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Alexey Dobriyan
17
56.67%
3
50.00%
Bart De Schuymer
8
26.67%
1
16.67%
Artem Savkov
3
10.00%
1
16.67%
Florian Westphal
2
6.67%
1
16.67%
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30
100.00%
6
100.00%



static void __net_exit frame_filter_net_exit(struct net *net)
{
	ebt_unregister_table(net, net->xt.frame_filter, ebt_ops_filter);
}

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Alexey Dobriyan
23
92.00%
2
66.67%
Florian Westphal
2
8.00%
1
33.33%
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100.00%


static struct pernet_operations frame_filter_net_ops = {
	.init = frame_filter_net_init,
	.exit = frame_filter_net_exit,
};



static int __init ebtable_filter_init(void)
{
	return register_pernet_subsys(&frame_filter_net_ops);
}

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Alexey Dobriyan
11
68.75%
1
33.33%
Bart De Schuymer
4
25.00%
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33.33%
Florian Westphal
1
6.25%
1
33.33%
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16
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3
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static void __exit ebtable_filter_fini(void)
{
	unregister_pernet_subsys(&frame_filter_net_ops);
}

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Bart De Schuymer
11
73.33%
1
33.33%
Alexey Dobriyan
3
20.00%
1
33.33%
Andrew Morton
1
6.67%
1
33.33%
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module_init(ebtable_filter_init);

module_exit(ebtable_filter_fini);
MODULE_LICENSE("GPL");
Overall Contributors
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CommitProp
Bart De Schuymer
224
48.70%
3
14.29%
Alexey Dobriyan
108
23.48%
4
19.05%
Art Haas
90
19.57%
1
4.76%
David S. Miller
10
2.17%
1
4.76%
Florian Westphal
6
1.30%
2
9.52%
Eric W. Biedermann
6
1.30%
2
9.52%
Jan Engelhardt
4
0.87%
2
9.52%
Artem Savkov
3
0.65%
1
4.76%
Andrew Morton
3
0.65%
1
4.76%
Herbert Xu
2
0.43%
1
4.76%
Patrick McHardy
2
0.43%
1
4.76%
Ian Morris
1
0.22%
1
4.76%
Al Viro
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0.22%
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Directory: net/bridge/netfilter

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