[deliverable/linux.git] / include / linux / netfilter / x_tables.h

#ifndef _X_TABLES_H
#define _X_TABLES_H

#define XT_FUNCTION_MAXNAMELEN 30
#define XT_TABLE_MAXNAMELEN 32

/* The argument to IPT_SO_GET_REVISION_*.  Returns highest revision
 * kernel supports, if >= revision. */
struct xt_get_revision
{
	char name[XT_FUNCTION_MAXNAMELEN-1];

	u_int8_t 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
{
	u_int8_t u8;
	u_int16_t u16;
	u_int32_t u32;
	u_int64_t u64;
};

#define XT_ALIGN(s) (((s) + (__alignof__(struct _xt_align)-1)) 	\
			& ~(__alignof__(struct _xt_align)-1))

/* Standard return verdict, or do jump. */
#define XT_STANDARD_TARGET ""
/* Error verdict. */
#define XT_ERROR_TARGET "ERROR"

/*
 * New IP firewall options for [gs]etsockopt at the RAW IP level.
 * Unlike BSD Linux inherits IP options so you don't have to use a raw
 * socket for this. Instead we check rights in the calls. */
#define XT_BASE_CTL		64	/* base for firewall socket options */

#define XT_SO_SET_REPLACE	(XT_BASE_CTL)
#define XT_SO_SET_ADD_COUNTERS	(XT_BASE_CTL + 1)
#define XT_SO_SET_MAX		XT_SO_SET_ADD_COUNTERS

#define XT_SO_GET_INFO			(XT_BASE_CTL)
#define XT_SO_GET_ENTRIES		(XT_BASE_CTL + 1)
#define XT_SO_GET_REVISION_MATCH	(XT_BASE_CTL + 2)
#define XT_SO_GET_REVISION_TARGET	(XT_BASE_CTL + 3)
#define XT_SO_GET_MAX			XT_SO_GET_REVISION_TARGET

#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
{
	u_int64_t 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. */

#ifdef __KERNEL__

#include <linux/netdevice.h>

#define ASSERT_READ_LOCK(x)
#define ASSERT_WRITE_LOCK(x)
#include <linux/netfilter_ipv4/listhelp.h>

struct xt_match
{
	struct list_head list;

	const char name[XT_FUNCTION_MAXNAMELEN-1];

	u_int8_t revision;

	/* Return true or false: return FALSE and set *hotdrop = 1 to
           force immediate packet drop. */
	/* Arguments changed since 2.6.9, as this must now handle
	   non-linear skb, using skb_header_pointer and
	   skb_ip_make_writable. */
	int (*match)(const struct sk_buff *skb,
		     const struct net_device *in,
		     const struct net_device *out,
		     const void *matchinfo,
		     int offset,
		     unsigned int protoff,
		     int *hotdrop);

	/* Called when user tries to insert an entry of this type. */
	/* Should return true or false. */
	int (*checkentry)(const char *tablename,
			  const void *ip,
			  void *matchinfo,
			  unsigned int matchinfosize,
			  unsigned int hook_mask);

	/* Called when entry of this type deleted. */
	void (*destroy)(void *matchinfo, unsigned int matchinfosize);

	/* Set this to THIS_MODULE if you are a module, otherwise NULL */
	struct module *me;
};

/* Registration hooks for targets. */
struct xt_target
{
	struct list_head list;

	const char name[XT_FUNCTION_MAXNAMELEN-1];

	u_int8_t revision;

	/* Returns verdict. Argument order changed since 2.6.9, as this
	   must now handle non-linear skbs, using skb_copy_bits and
	   skb_ip_make_writable. */
	unsigned int (*target)(struct sk_buff **pskb,
			       const struct net_device *in,
			       const struct net_device *out,
			       unsigned int hooknum,
			       const void *targinfo,
			       void *userdata);

	/* Called when user tries to insert an entry of this type:
           hook_mask is a bitmask of hooks from which it can be
           called. */
	/* Should return true or false. */
	int (*checkentry)(const char *tablename,
			  const void *entry,
			  void *targinfo,
			  unsigned int targinfosize,
			  unsigned int hook_mask);

	/* Called when entry of this type deleted. */
	void (*destroy)(void *targinfo, unsigned int targinfosize);

	/* Set this to THIS_MODULE if you are a module, otherwise NULL */
	struct module *me;
};

/* Furniture shopping... */
struct xt_table
{
	struct list_head list;

	/* A unique name... */
	char name[XT_TABLE_MAXNAMELEN];

	/* What hooks you will enter on */
	unsigned int valid_hooks;

	/* Lock for the curtain */
	rwlock_t lock;

	/* Man behind the curtain... */
	//struct ip6t_table_info *private;
	void *private;

	/* Set this to THIS_MODULE if you are a module, otherwise NULL */
	struct module *me;

	int af;		/* address/protocol family */
};

#include <linux/netfilter_ipv4.h>

/* The table itself */
struct xt_table_info
{
	/* Size per table */
	unsigned int size;
	/* Number of entries: FIXME. --RR */
	unsigned int number;
	/* Initial number of entries. Needed for module usage count */
	unsigned int initial_entries;

	/* Entry points and underflows */
	unsigned int hook_entry[NF_IP_NUMHOOKS];
	unsigned int underflow[NF_IP_NUMHOOKS];

	/* ipt_entry tables: one per CPU */
	char *entries[NR_CPUS];
};

extern int xt_register_target(int af, struct xt_target *target);
extern void xt_unregister_target(int af, struct xt_target *target);
extern int xt_register_match(int af, struct xt_match *target);
extern void xt_unregister_match(int af, struct xt_match *target);

extern int xt_register_table(struct xt_table *table,
			     struct xt_table_info *bootstrap,
			     struct xt_table_info *newinfo);
extern void *xt_unregister_table(struct xt_table *table);

extern struct xt_table_info *xt_replace_table(struct xt_table *table,
					      unsigned int num_counters,
					      struct xt_table_info *newinfo,
					      int *error);

extern struct xt_match *xt_find_match(int af, const char *name, u8 revision);
extern struct xt_target *xt_find_target(int af, const char *name, u8 revision);
extern struct xt_target *xt_request_find_target(int af, const char *name, 
						u8 revision);
extern int xt_find_revision(int af, const char *name, u8 revision, int target,
			    int *err);

extern struct xt_table *xt_find_table_lock(int af, const char *name);
extern void xt_table_unlock(struct xt_table *t);

extern int xt_proto_init(int af);
extern void xt_proto_fini(int af);

extern struct xt_table_info *xt_alloc_table_info(unsigned int size);
extern void xt_free_table_info(struct xt_table_info *info);

#endif /* __KERNEL__ */

#endif /* _X_TABLES_H */
Commit	Line	Data
2e4e6a17 HW	1	#ifndef _X_TABLES_H
	2	#define _X_TABLES_H
	3
	4	#define XT_FUNCTION_MAXNAMELEN 30
	5	#define XT_TABLE_MAXNAMELEN 32
	6
	7	/* The argument to IPT_SO_GET_REVISION_*. Returns highest revision
	8	* kernel supports, if >= revision. */
	9	struct xt_get_revision
	10	{
	11	char name[XT_FUNCTION_MAXNAMELEN-1];
	12
	13	u_int8_t revision;
	14	};
	15
	16	/* CONTINUE verdict for targets */
	17	#define XT_CONTINUE 0xFFFFFFFF
	18
	19	/* For standard target */
	20	#define XT_RETURN (-NF_REPEAT - 1)
	21
6fbfc968 DM	22	/* this is a dummy structure to find out the alignment requirement for a struct
	23	* containing all the fundamental data types that are used in ipt_entry,
	24	* ip6t_entry and arpt_entry. This sucks, and it is a hack. It will be my
	25	* personal pleasure to remove it -HW
	26	*/
	27	struct _xt_align
	28	{
	29	u_int8_t u8;
	30	u_int16_t u16;
	31	u_int32_t u32;
	32	u_int64_t u64;
	33	};
	34
	35	#define XT_ALIGN(s) (((s) + (__alignof__(struct _xt_align)-1)) \
	36	& ~(__alignof__(struct _xt_align)-1))
2e4e6a17 HW	37
	38	/* Standard return verdict, or do jump. */
	39	#define XT_STANDARD_TARGET ""
	40	/* Error verdict. */
	41	#define XT_ERROR_TARGET "ERROR"
	42
	43	/*
	44	* New IP firewall options for [gs]etsockopt at the RAW IP level.
	45	* Unlike BSD Linux inherits IP options so you don't have to use a raw
	46	* socket for this. Instead we check rights in the calls. */
	47	#define XT_BASE_CTL 64 /* base for firewall socket options */
	48
	49	#define XT_SO_SET_REPLACE (XT_BASE_CTL)
	50	#define XT_SO_SET_ADD_COUNTERS (XT_BASE_CTL + 1)
	51	#define XT_SO_SET_MAX XT_SO_SET_ADD_COUNTERS
	52
	53	#define XT_SO_GET_INFO (XT_BASE_CTL)
	54	#define XT_SO_GET_ENTRIES (XT_BASE_CTL + 1)
	55	#define XT_SO_GET_REVISION_MATCH (XT_BASE_CTL + 2)
	56	#define XT_SO_GET_REVISION_TARGET (XT_BASE_CTL + 3)
	57	#define XT_SO_GET_MAX XT_SO_GET_REVISION_TARGET
	58
	59	#define SET_COUNTER(c,b,p) do { (c).bcnt = (b); (c).pcnt = (p); } while(0)
	60	#define ADD_COUNTER(c,b,p) do { (c).bcnt += (b); (c).pcnt += (p); } while(0)
	61
	62	struct xt_counters
	63	{
	64	u_int64_t pcnt, bcnt; /* Packet and byte counters */
	65	};
	66
	67	/* The argument to IPT_SO_ADD_COUNTERS. */
	68	struct xt_counters_info
	69	{
	70	/* Which table. */
	71	char name[XT_TABLE_MAXNAMELEN];
	72
	73	unsigned int num_counters;
	74
	75	/* The counters (actually `number' of these). */
	76	struct xt_counters counters[0];
	77	};
	78
	79	#define XT_INV_PROTO 0x40 /* Invert the sense of PROTO. */
	80
	81	#ifdef __KERNEL__
	82
	83	#include <linux/netdevice.h>
	84
	85	#define ASSERT_READ_LOCK(x)
	86	#define ASSERT_WRITE_LOCK(x)
	87	#include <linux/netfilter_ipv4/listhelp.h>
	88
	89	struct xt_match
	90	{
	91	struct list_head list;
	92
	93	const char name[XT_FUNCTION_MAXNAMELEN-1];
	94
	95	u_int8_t revision;
	96
	97	/* Return true or false: return FALSE and set *hotdrop = 1 to
	98	force immediate packet drop. */
	99	/* Arguments changed since 2.6.9, as this must now handle
	100	non-linear skb, using skb_header_pointer and
101	skb_ip_make_writable. */
102	int (match)(const struct sk_buff skb,
103	const struct net_device *in,
104	const struct net_device *out,
105	const void *matchinfo,
106	int offset,
107	unsigned int protoff,
108	int *hotdrop);
109
110	/* Called when user tries to insert an entry of this type. */
111	/* Should return true or false. */
112	int (checkentry)(const char tablename,
113	const void *ip,
114	void *matchinfo,
115	unsigned int matchinfosize,
116	unsigned int hook_mask);
117
118	/* Called when entry of this type deleted. */
119	void (destroy)(void matchinfo, unsigned int matchinfosize);
120
121	/* Set this to THIS_MODULE if you are a module, otherwise NULL */
122	struct module *me;
123	};
124
125	/* Registration hooks for targets. */
126	struct xt_target
127	{
128	struct list_head list;
129
130	const char name[XT_FUNCTION_MAXNAMELEN-1];
131
132	u_int8_t revision;
133
134	/* Returns verdict. Argument order changed since 2.6.9, as this
135	must now handle non-linear skbs, using skb_copy_bits and
136	skb_ip_make_writable. */
137	unsigned int (target)(struct sk_buff *pskb,
138	const struct net_device *in,
139	const struct net_device *out,
140	unsigned int hooknum,
141	const void *targinfo,
142	void *userdata);
143
144	/* Called when user tries to insert an entry of this type:
145	hook_mask is a bitmask of hooks from which it can be
146	called. */
147	/* Should return true or false. */
148	int (checkentry)(const char tablename,
149	const void *entry,
150	void *targinfo,
151	unsigned int targinfosize,
152	unsigned int hook_mask);
153
154	/* Called when entry of this type deleted. */
155	void (destroy)(void targinfo, unsigned int targinfosize);
156
157	/* Set this to THIS_MODULE if you are a module, otherwise NULL */
158	struct module *me;
159	};
160
161	/* Furniture shopping... */
162	struct xt_table
163	{
164	struct list_head list;
165
166	/* A unique name... */
167	char name[XT_TABLE_MAXNAMELEN];
168
169	/* What hooks you will enter on */
170	unsigned int valid_hooks;
171
172	/* Lock for the curtain */
173	rwlock_t lock;
174
175	/* Man behind the curtain... */
176	//struct ip6t_table_info *private;
177	void *private;
178
179	/* Set this to THIS_MODULE if you are a module, otherwise NULL */
180	struct module *me;
181
182	int af; /* address/protocol family */
183	};
184
185	#include <linux/netfilter_ipv4.h>
186
187	/* The table itself */
188	struct xt_table_info
189	{
190	/* Size per table */
191	unsigned int size;
192	/* Number of entries: FIXME. --RR */
193	unsigned int number;
194	/* Initial number of entries. Needed for module usage count */
195	unsigned int initial_entries;
196
197	/* Entry points and underflows */
198	unsigned int hook_entry[NF_IP_NUMHOOKS];
199	unsigned int underflow[NF_IP_NUMHOOKS];
200
201	/* ipt_entry tables: one per CPU */
202	char *entries[NR_CPUS];
203	};
204
205	extern int xt_register_target(int af, struct xt_target *target);
206	extern void xt_unregister_target(int af, struct xt_target *target);
207	extern int xt_register_match(int af, struct xt_match *target);
208	extern void xt_unregister_match(int af, struct xt_match *target);
209
210	extern int xt_register_table(struct xt_table *table,
211	struct xt_table_info *bootstrap,
212	struct xt_table_info *newinfo);
213	extern void xt_unregister_table(struct xt_table table);
214
215	extern struct xt_table_info xt_replace_table(struct xt_table table,
216	unsigned int num_counters,
217	struct xt_table_info *newinfo,
218	int *error);
219
220	extern struct xt_match xt_find_match(int af, const char name, u8 revision);
221	extern struct xt_target xt_find_target(int af, const char name, u8 revision);
222	extern struct xt_target xt_request_find_target(int af, const char name,
223	u8 revision);
224	extern int xt_find_revision(int af, const char *name, u8 revision, int target,
225	int *err);
226
227	extern struct xt_table xt_find_table_lock(int af, const char name);
228	extern void xt_table_unlock(struct xt_table *t);
229
230	extern int xt_proto_init(int af);
231	extern void xt_proto_fini(int af);
232
233	extern struct xt_table_info *xt_alloc_table_info(unsigned int size);
234	extern void xt_free_table_info(struct xt_table_info *info);
235
236	#endif /* __KERNEL__ */
237
238	#endif /* _X_TABLES_H */