Subversion Repositories hf-risc

#ifndef _X_TABLES_H
#define _X_TABLES_H
#include <linux/kernel.h>
#include <linux/types.h>
 
#define XT_FUNCTION_MAXNAMELEN 30
#define XT_EXTENSION_MAXNAMELEN 29
#define XT_TABLE_MAXNAMELEN 32
 
struct xt_entry_match {
	union {
		struct {
			__u16 match_size;
 
			/* Used by userspace */
			char name[XT_EXTENSION_MAXNAMELEN];
			__u8 revision;
		} user;
		struct {
			__u16 match_size;
 
			/* Used inside the kernel */
			struct xt_match *match;
		} kernel;
 
		/* Total length */
		__u16 match_size;
	} u;
 
	unsigned char data[0];
};
 
struct xt_entry_target {
	union {
		struct {
			__u16 target_size;
 
			/* Used by userspace */
			char name[XT_EXTENSION_MAXNAMELEN];
			__u8 revision;
		} user;
		struct {
			__u16 target_size;
 
			/* Used inside the kernel */
			struct xt_target *target;
		} kernel;
 
		/* Total length */
		__u16 target_size;
	} u;
 
	unsigned char data[0];
};
 
#define XT_TARGET_INIT(__name, __size)					       \
{									       \
	.target.u.user = {						       \
		.target_size	= XT_ALIGN(__size),			       \
		.name		= __name,				       \
	},								       \
}
 
struct xt_standard_target {
	struct xt_entry_target target;
	int verdict;
};
 
struct xt_error_target {
	struct xt_entry_target target;
	char errorname[XT_FUNCTION_MAXNAMELEN];
};
 
/* The argument to IPT_SO_GET_REVISION_*.  Returns highest revision
 * kernel supports, if >= revision. */
struct xt_get_revision {
	char name[XT_EXTENSION_MAXNAMELEN];
	__u8 revision;
};
 
/* CONTINUE verdict for targets */
#define XT_CONTINUE 0xFFFFFFFF
 
/* For standard target */
#define XT_RETURN (-NF_REPEAT - 1)
 
/* this is a dummy structure to find out the alignment requirement for a struct
 * containing all the fundamental data types that are used in ipt_entry,
 * ip6t_entry and arpt_entry.  This sucks, and it is a hack.  It will be my
 * personal pleasure to remove it -HW
 */
struct _xt_align {
	__u8 u8;
	__u16 u16;
	__u32 u32;
	__u64 u64;
};
 
#define XT_ALIGN(s) __ALIGN_KERNEL((s), __alignof__(struct _xt_align))
 
/* Standard return verdict, or do jump. */
#define XT_STANDARD_TARGET ""
/* Error verdict. */
#define XT_ERROR_TARGET "ERROR"
 
#define SET_COUNTER(c,b,p) do { (c).bcnt = (b); (c).pcnt = (p); } while(0)
#define ADD_COUNTER(c,b,p) do { (c).bcnt += (b); (c).pcnt += (p); } while(0)
 
struct xt_counters {
	__u64 pcnt, bcnt;			/* Packet and byte counters */
};
 
/* The argument to IPT_SO_ADD_COUNTERS. */
struct xt_counters_info {
	/* Which table. */
	char name[XT_TABLE_MAXNAMELEN];
 
	unsigned int num_counters;
 
	/* The counters (actually `number' of these). */
	struct xt_counters counters[0];
};
 
#define XT_INV_PROTO		0x40	/* Invert the sense of PROTO. */
 
/* fn returns 0 to continue iteration */
#define XT_MATCH_ITERATE(type, e, fn, args...)			\
({								\
	unsigned int __i;					\
	int __ret = 0;						\
	struct xt_entry_match *__m;				\
								\
	for (__i = sizeof(type);				\
	     __i < (e)->target_offset;				\
	     __i += __m->u.match_size) {			\
		__m = (void *)e + __i;				\
								\
		__ret = fn(__m , ## args);			\
		if (__ret != 0)					\
			break;					\
	}							\
	__ret;							\
})
 
/* fn returns 0 to continue iteration */
#define XT_ENTRY_ITERATE_CONTINUE(type, entries, size, n, fn, args...) \
({								\
	unsigned int __i, __n;					\
	int __ret = 0;						\
	type *__entry;						\
								\
	for (__i = 0, __n = 0; __i < (size);			\
	     __i += __entry->next_offset, __n++) { 		\
		__entry = (void *)(entries) + __i;		\
		if (__n < n)					\
			continue;				\
								\
		__ret = fn(__entry , ## args);			\
		if (__ret != 0)					\
			break;					\
	}							\
	__ret;							\
})
 
/* fn returns 0 to continue iteration */
#define XT_ENTRY_ITERATE(type, entries, size, fn, args...) \
	XT_ENTRY_ITERATE_CONTINUE(type, entries, size, 0, fn, args)
 
 
/* pos is normally a struct ipt_entry/ip6t_entry/etc. */
#define xt_entry_foreach(pos, ehead, esize) \
	for ((pos) = (typeof(pos))(ehead); \
	     (pos) < (typeof(pos))((char *)(ehead) + (esize)); \
	     (pos) = (typeof(pos))((char *)(pos) + (pos)->next_offset))
 
/* can only be xt_entry_match, so no use of typeof here */
#define xt_ematch_foreach(pos, entry) \
	for ((pos) = (struct xt_entry_match *)entry->elems; \
	     (pos) < (struct xt_entry_match *)((char *)(entry) + \
	             (entry)->target_offset); \
	     (pos) = (struct xt_entry_match *)((char *)(pos) + \
	             (pos)->u.match_size))
 
 
#endif /* _X_TABLES_H */