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_INET_NUMHOOKS];
269 unsigned int underflow[NF_INET_NUMHOOKS];
271 /* ipt_entry tables: one per CPU */
272 /* Note : this field MUST be the last one, see XT_TABLE_INFO_SZ */
276 #define XT_TABLE_INFO_SZ (offsetof(struct xt_table_info, entries) \
277 + nr_cpu_ids * sizeof(char *))
278 extern int xt_register_target(struct xt_target *target);
279 extern void xt_unregister_target(struct xt_target *target);
280 extern int xt_register_targets(struct xt_target *target, unsigned int n);
281 extern void xt_unregister_targets(struct xt_target *target, unsigned int n);
283 extern int xt_register_match(struct xt_match *target);
284 extern void xt_unregister_match(struct xt_match *target);
285 extern int xt_register_matches(struct xt_match *match, unsigned int n);
286 extern void xt_unregister_matches(struct xt_match *match, unsigned int n);
288 extern int xt_check_match(const struct xt_match *match, unsigned short family,
289 unsigned int size, const char *table, unsigned int hook,
290 unsigned short proto, int inv_proto);
291 extern int xt_check_target(const struct xt_target *target, unsigned short family,
292 unsigned int size, const char *table, unsigned int hook,
293 unsigned short proto, int inv_proto);
295 extern int xt_register_table(struct xt_table *table,
296 struct xt_table_info *bootstrap,
297 struct xt_table_info *newinfo);
298 extern void *xt_unregister_table(struct xt_table *table);
300 extern struct xt_table_info *xt_replace_table(struct xt_table *table,
301 unsigned int num_counters,
302 struct xt_table_info *newinfo,
305 extern struct xt_match *xt_find_match(int af, const char *name, u8 revision);
306 extern struct xt_target *xt_find_target(int af, const char *name, u8 revision);
307 extern struct xt_target *xt_request_find_target(int af, const char *name,
309 extern int xt_find_revision(int af, const char *name, u8 revision, int target,
312 extern struct xt_table *xt_find_table_lock(int af, const char *name);
313 extern void xt_table_unlock(struct xt_table *t);
315 extern int xt_proto_init(int af);
316 extern void xt_proto_fini(int af);
318 extern struct xt_table_info *xt_alloc_table_info(unsigned int size);
319 extern void xt_free_table_info(struct xt_table_info *info);
322 #include <net/compat.h>
324 struct compat_xt_entry_match
328 u_int16_t match_size;
329 char name[XT_FUNCTION_MAXNAMELEN - 1];
333 u_int16_t match_size;
336 u_int16_t match_size;
338 unsigned char data[0];
341 struct compat_xt_entry_target
345 u_int16_t target_size;
346 char name[XT_FUNCTION_MAXNAMELEN - 1];
350 u_int16_t target_size;
351 compat_uptr_t target;
353 u_int16_t target_size;
355 unsigned char data[0];
358 /* FIXME: this works only on 32 bit tasks
359 * need to change whole approach in order to calculate align as function of
360 * current task alignment */
362 struct compat_xt_counters
364 #if defined(CONFIG_X86_64) || defined(CONFIG_IA64)
371 struct compat_xt_counters_info
373 char name[XT_TABLE_MAXNAMELEN];
374 compat_uint_t num_counters;
375 struct compat_xt_counters counters[0];
378 #define COMPAT_XT_ALIGN(s) (((s) + (__alignof__(struct compat_xt_counters)-1)) \
379 & ~(__alignof__(struct compat_xt_counters)-1))
381 extern void xt_compat_lock(int af);
382 extern void xt_compat_unlock(int af);
384 extern int xt_compat_match_offset(struct xt_match *match);
385 extern void xt_compat_match_from_user(struct xt_entry_match *m,
386 void **dstptr, int *size);
387 extern int xt_compat_match_to_user(struct xt_entry_match *m,
388 void __user **dstptr, int *size);
390 extern int xt_compat_target_offset(struct xt_target *target);
391 extern void xt_compat_target_from_user(struct xt_entry_target *t,
392 void **dstptr, int *size);
393 extern int xt_compat_target_to_user(struct xt_entry_target *t,
394 void __user **dstptr, int *size);
396 #endif /* CONFIG_COMPAT */
397 #endif /* __KERNEL__ */
399 #endif /* _X_TABLES_H */