4 #define XT_FUNCTION_MAXNAMELEN 30
5 #define XT_TABLE_MAXNAMELEN 32
13 /* Used by userspace */
14 char name
[XT_FUNCTION_MAXNAMELEN
-1];
21 /* Used inside the kernel */
22 struct xt_match
*match
;
29 unsigned char data
[0];
32 struct xt_entry_target
36 u_int16_t target_size
;
38 /* Used by userspace */
39 char name
[XT_FUNCTION_MAXNAMELEN
-1];
44 u_int16_t target_size
;
46 /* Used inside the kernel */
47 struct xt_target
*target
;
51 u_int16_t target_size
;
54 unsigned char data
[0];
57 #define XT_TARGET_INIT(__name, __size) \
60 .target_size = XT_ALIGN(__size), \
65 struct xt_standard_target
67 struct xt_entry_target target
;
71 /* The argument to IPT_SO_GET_REVISION_*. Returns highest revision
72 * kernel supports, if >= revision. */
73 struct xt_get_revision
75 char name
[XT_FUNCTION_MAXNAMELEN
-1];
80 /* CONTINUE verdict for targets */
81 #define XT_CONTINUE 0xFFFFFFFF
83 /* For standard target */
84 #define XT_RETURN (-NF_REPEAT - 1)
86 /* this is a dummy structure to find out the alignment requirement for a struct
87 * containing all the fundamental data types that are used in ipt_entry,
88 * ip6t_entry and arpt_entry. This sucks, and it is a hack. It will be my
89 * personal pleasure to remove it -HW
99 #define XT_ALIGN(s) (((s) + (__alignof__(struct _xt_align)-1)) \
100 & ~(__alignof__(struct _xt_align)-1))
102 /* Standard return verdict, or do jump. */
103 #define XT_STANDARD_TARGET ""
105 #define XT_ERROR_TARGET "ERROR"
107 #define SET_COUNTER(c,b,p) do { (c).bcnt = (b); (c).pcnt = (p); } while(0)
108 #define ADD_COUNTER(c,b,p) do { (c).bcnt += (b); (c).pcnt += (p); } while(0)
112 u_int64_t pcnt
, bcnt
; /* Packet and byte counters */
115 /* The argument to IPT_SO_ADD_COUNTERS. */
116 struct xt_counters_info
119 char name
[XT_TABLE_MAXNAMELEN
];
121 unsigned int num_counters
;
123 /* The counters (actually `number' of these). */
124 struct xt_counters counters
[0];
127 #define XT_INV_PROTO 0x40 /* Invert the sense of PROTO. */
131 #include <linux/netdevice.h>
135 struct list_head list
;
137 const char name
[XT_FUNCTION_MAXNAMELEN
-1];
139 /* Return true or false: return FALSE and set *hotdrop = 1 to
140 force immediate packet drop. */
141 /* Arguments changed since 2.6.9, as this must now handle
142 non-linear skb, using skb_header_pointer and
143 skb_ip_make_writable. */
144 bool (*match
)(const struct sk_buff
*skb
,
145 const struct net_device
*in
,
146 const struct net_device
*out
,
147 const struct xt_match
*match
,
148 const void *matchinfo
,
150 unsigned int protoff
,
153 /* Called when user tries to insert an entry of this type. */
154 /* Should return true or false. */
155 bool (*checkentry
)(const char *tablename
,
157 const struct xt_match
*match
,
159 unsigned int hook_mask
);
161 /* Called when entry of this type deleted. */
162 void (*destroy
)(const struct xt_match
*match
, void *matchinfo
);
164 /* Called when userspace align differs from kernel space one */
165 void (*compat_from_user
)(void *dst
, void *src
);
166 int (*compat_to_user
)(void __user
*dst
, void *src
);
168 /* Set this to THIS_MODULE if you are a module, otherwise NULL */
171 /* Free to use by each match */
175 unsigned int matchsize
;
176 unsigned int compatsize
;
178 unsigned short proto
;
180 unsigned short family
;
184 /* Registration hooks for targets. */
187 struct list_head list
;
189 const char name
[XT_FUNCTION_MAXNAMELEN
-1];
191 /* Returns verdict. Argument order changed since 2.6.9, as this
192 must now handle non-linear skbs, using skb_copy_bits and
193 skb_ip_make_writable. */
194 unsigned int (*target
)(struct sk_buff
*skb
,
195 const struct net_device
*in
,
196 const struct net_device
*out
,
197 unsigned int hooknum
,
198 const struct xt_target
*target
,
199 const void *targinfo
);
201 /* Called when user tries to insert an entry of this type:
202 hook_mask is a bitmask of hooks from which it can be
204 /* Should return true or false. */
205 bool (*checkentry
)(const char *tablename
,
207 const struct xt_target
*target
,
209 unsigned int hook_mask
);
211 /* Called when entry of this type deleted. */
212 void (*destroy
)(const struct xt_target
*target
, void *targinfo
);
214 /* Called when userspace align differs from kernel space one */
215 void (*compat_from_user
)(void *dst
, void *src
);
216 int (*compat_to_user
)(void __user
*dst
, void *src
);
218 /* Set this to THIS_MODULE if you are a module, otherwise NULL */
222 unsigned int targetsize
;
223 unsigned int compatsize
;
225 unsigned short proto
;
227 unsigned short family
;
231 /* Furniture shopping... */
234 struct list_head list
;
236 /* A unique name... */
237 char name
[XT_TABLE_MAXNAMELEN
];
239 /* What hooks you will enter on */
240 unsigned int valid_hooks
;
242 /* Lock for the curtain */
245 /* Man behind the curtain... */
246 //struct ip6t_table_info *private;
249 /* Set this to THIS_MODULE if you are a module, otherwise NULL */
252 int af
; /* address/protocol family */
255 #include <linux/netfilter_ipv4.h>
257 /* The table itself */
262 /* Number of entries: FIXME. --RR */
264 /* Initial number of entries. Needed for module usage count */
265 unsigned int initial_entries
;
267 /* Entry points and underflows */
268 unsigned int hook_entry
[NF_IP_NUMHOOKS
];
269 unsigned int underflow
[NF_IP_NUMHOOKS
];
271 /* ipt_entry tables: one per CPU */
272 char *entries
[NR_CPUS
];
275 extern int xt_register_target(struct xt_target
*target
);
276 extern void xt_unregister_target(struct xt_target
*target
);
277 extern int xt_register_targets(struct xt_target
*target
, unsigned int n
);
278 extern void xt_unregister_targets(struct xt_target
*target
, unsigned int n
);
280 extern int xt_register_match(struct xt_match
*target
);
281 extern void xt_unregister_match(struct xt_match
*target
);
282 extern int xt_register_matches(struct xt_match
*match
, unsigned int n
);
283 extern void xt_unregister_matches(struct xt_match
*match
, unsigned int n
);
285 extern int xt_check_match(const struct xt_match
*match
, unsigned short family
,
286 unsigned int size
, const char *table
, unsigned int hook
,
287 unsigned short proto
, int inv_proto
);
288 extern int xt_check_target(const struct xt_target
*target
, unsigned short family
,
289 unsigned int size
, const char *table
, unsigned int hook
,
290 unsigned short proto
, int inv_proto
);
292 extern int xt_register_table(struct xt_table
*table
,
293 struct xt_table_info
*bootstrap
,
294 struct xt_table_info
*newinfo
);
295 extern void *xt_unregister_table(struct xt_table
*table
);
297 extern struct xt_table_info
*xt_replace_table(struct xt_table
*table
,
298 unsigned int num_counters
,
299 struct xt_table_info
*newinfo
,
302 extern struct xt_match
*xt_find_match(int af
, const char *name
, u8 revision
);
303 extern struct xt_target
*xt_find_target(int af
, const char *name
, u8 revision
);
304 extern struct xt_target
*xt_request_find_target(int af
, const char *name
,
306 extern int xt_find_revision(int af
, const char *name
, u8 revision
, int target
,
309 extern struct xt_table
*xt_find_table_lock(int af
, const char *name
);
310 extern void xt_table_unlock(struct xt_table
*t
);
312 extern int xt_proto_init(int af
);
313 extern void xt_proto_fini(int af
);
315 extern struct xt_table_info
*xt_alloc_table_info(unsigned int size
);
316 extern void xt_free_table_info(struct xt_table_info
*info
);
319 #include <net/compat.h>
321 struct compat_xt_entry_match
325 u_int16_t match_size
;
326 char name
[XT_FUNCTION_MAXNAMELEN
- 1];
330 u_int16_t match_size
;
333 u_int16_t match_size
;
335 unsigned char data
[0];
338 struct compat_xt_entry_target
342 u_int16_t target_size
;
343 char name
[XT_FUNCTION_MAXNAMELEN
- 1];
347 u_int16_t target_size
;
348 compat_uptr_t target
;
350 u_int16_t target_size
;
352 unsigned char data
[0];
355 /* FIXME: this works only on 32 bit tasks
356 * need to change whole approach in order to calculate align as function of
357 * current task alignment */
359 struct compat_xt_counters
361 #if defined(CONFIG_X86_64) || defined(CONFIG_IA64)
368 struct compat_xt_counters_info
370 char name
[XT_TABLE_MAXNAMELEN
];
371 compat_uint_t num_counters
;
372 struct compat_xt_counters counters
[0];
375 #define COMPAT_XT_ALIGN(s) (((s) + (__alignof__(struct compat_xt_counters)-1)) \
376 & ~(__alignof__(struct compat_xt_counters)-1))
378 extern void xt_compat_lock(int af
);
379 extern void xt_compat_unlock(int af
);
381 extern int xt_compat_match_offset(struct xt_match
*match
);
382 extern void xt_compat_match_from_user(struct xt_entry_match
*m
,
383 void **dstptr
, int *size
);
384 extern int xt_compat_match_to_user(struct xt_entry_match
*m
,
385 void __user
**dstptr
, int *size
);
387 extern int xt_compat_target_offset(struct xt_target
*target
);
388 extern void xt_compat_target_from_user(struct xt_entry_target
*t
,
389 void **dstptr
, int *size
);
390 extern int xt_compat_target_to_user(struct xt_entry_target
*t
,
391 void __user
**dstptr
, int *size
);
393 #endif /* CONFIG_COMPAT */
394 #endif /* __KERNEL__ */
396 #endif /* _X_TABLES_H */