[linux-2.6-block.git] / include / linux / netfilter_arp / arp_tables.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * 	Format of an ARP firewall descriptor
 *
 * 	src, tgt, src_mask, tgt_mask, arpop, arpop_mask are always stored in
 *	network byte order.
 * 	flags are stored in host byte order (of course).
 */
#ifndef _ARPTABLES_H
#define _ARPTABLES_H

#include <linux/if.h>
#include <linux/in.h>
#include <linux/if_arp.h>
#include <linux/skbuff.h>
#include <uapi/linux/netfilter_arp/arp_tables.h>

/* Standard entry. */
struct arpt_standard {
	struct arpt_entry entry;
	struct xt_standard_target target;
};

struct arpt_error {
	struct arpt_entry entry;
	struct xt_error_target target;
};

#define ARPT_ENTRY_INIT(__size)						       \
{									       \
	.target_offset	= sizeof(struct arpt_entry),			       \
	.next_offset	= (__size),					       \
}

#define ARPT_STANDARD_INIT(__verdict)					       \
{									       \
	.entry		= ARPT_ENTRY_INIT(sizeof(struct arpt_standard)),       \
	.target		= XT_TARGET_INIT(XT_STANDARD_TARGET,		       \
					 sizeof(struct xt_standard_target)), \
	.target.verdict	= -(__verdict) - 1,				       \
}

#define ARPT_ERROR_INIT							       \
{									       \
	.entry		= ARPT_ENTRY_INIT(sizeof(struct arpt_error)),	       \
	.target		= XT_TARGET_INIT(XT_ERROR_TARGET,		       \
					 sizeof(struct xt_error_target)),      \
	.target.errorname = "ERROR",					       \
}

extern void *arpt_alloc_initial_table(const struct xt_table *);
int arpt_register_table(struct net *net, const struct xt_table *table,
			const struct arpt_replace *repl,
			const struct nf_hook_ops *ops, struct xt_table **res);
void arpt_unregister_table(struct net *net, struct xt_table *table,
			   const struct nf_hook_ops *ops);
extern unsigned int arpt_do_table(struct sk_buff *skb,
				  const struct nf_hook_state *state,
				  struct xt_table *table);

#ifdef CONFIG_COMPAT
#include <net/compat.h>

struct compat_arpt_entry {
	struct arpt_arp arp;
	__u16 target_offset;
	__u16 next_offset;
	compat_uint_t comefrom;
	struct compat_xt_counters counters;
	unsigned char elems[0];
};

static inline struct xt_entry_target *
compat_arpt_get_target(struct compat_arpt_entry *e)
{
	return (void *)e + e->target_offset;
}

#endif /* CONFIG_COMPAT */
#endif /* _ARPTABLES_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4 LT	2	/*
	3	* Format of an ARP firewall descriptor
	4	*
	5	* src, tgt, src_mask, tgt_mask, arpop, arpop_mask are always stored in
	6	* network byte order.
	7	* flags are stored in host byte order (of course).
	8	*/
1da177e4 LT	9	#ifndef _ARPTABLES_H
	10	#define _ARPTABLES_H
	11
1da177e4	12	#include <linux/if.h>
1da177e4 LT	13	#include <linux/in.h>
	14	#include <linux/if_arp.h>
	15	#include <linux/skbuff.h>
8922082a	16	#include <uapi/linux/netfilter_arp/arp_tables.h>
1da177e4	17
3c2ad469	18	/* Standard entry. */
d94d9fee	19	struct arpt_standard {
3c2ad469	20	struct arpt_entry entry;
87a2e70d	21	struct xt_standard_target target;
3c2ad469 PM	22	};
3c2ad469 PM	23
d94d9fee	24	struct arpt_error {
3c2ad469	25	struct arpt_entry entry;
75f0a0fd	26	struct xt_error_target target;
3c2ad469 PM	27	};
	28
	29	#define ARPT_ENTRY_INIT(__size) \
	30	{ \
	31	.target_offset = sizeof(struct arpt_entry), \
	32	.next_offset = (__size), \
	33	}
	34
	35	#define ARPT_STANDARD_INIT(__verdict) \
	36	{ \
	37	.entry = ARPT_ENTRY_INIT(sizeof(struct arpt_standard)), \
243bf6e2	38	.target = XT_TARGET_INIT(XT_STANDARD_TARGET, \
87a2e70d	39	sizeof(struct xt_standard_target)), \
3c2ad469 PM	40	.target.verdict = -(__verdict) - 1, \
	41	}
	42
	43	#define ARPT_ERROR_INIT \
	44	{ \
	45	.entry = ARPT_ENTRY_INIT(sizeof(struct arpt_error)), \
243bf6e2	46	.target = XT_TARGET_INIT(XT_ERROR_TARGET, \
75f0a0fd	47	sizeof(struct xt_error_target)), \
3c2ad469 PM	48	.target.errorname = "ERROR", \
	49	}
	50
e3eaa991	51	extern void arpt_alloc_initial_table(const struct xt_table );
a67dd266 FW	52	int arpt_register_table(struct net net, const struct xt_table table,
	53	const struct arpt_replace *repl,
	54	const struct nf_hook_ops ops, struct xt_table *res);
	55	void arpt_unregister_table(struct net net, struct xt_table table,
	56	const struct nf_hook_ops *ops);
3db05fea	57	extern unsigned int arpt_do_table(struct sk_buff *skb,
b85c3dc9	58	const struct nf_hook_state *state,
4abff077	59	struct xt_table *table);
1da177e4	60
d6a2ba07 PM	61	#ifdef CONFIG_COMPAT
	62	#include <net/compat.h>
	63
d94d9fee	64	struct compat_arpt_entry {
d6a2ba07	65	struct arpt_arp arp;
7ff30c43 BH	66	__u16 target_offset;
7ff30c43 BH	67	__u16 next_offset;
d6a2ba07 PM	68	compat_uint_t comefrom;
	69	struct compat_xt_counters counters;
	70	unsigned char elems[0];
	71	};
	72
87a2e70d	73	static inline struct xt_entry_target *
d6a2ba07 PM	74	compat_arpt_get_target(struct compat_arpt_entry *e)
	75	{
	76	return (void *)e + e->target_offset;
	77	}
	78
d6a2ba07	79	#endif /* CONFIG_COMPAT */
1da177e4	80	#endif /* _ARPTABLES_H */