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 struct xt_standard_target
59 struct xt_entry_target target;
63 /* The argument to IPT_SO_GET_REVISION_*. Returns highest revision
64 * kernel supports, if >= revision. */
65 struct xt_get_revision
67 char name[XT_FUNCTION_MAXNAMELEN-1];
72 /* CONTINUE verdict for targets */
73 #define XT_CONTINUE 0xFFFFFFFF
75 /* For standard target */
76 #define XT_RETURN (-NF_REPEAT - 1)
78 /* this is a dummy structure to find out the alignment requirement for a struct
79 * containing all the fundamental data types that are used in ipt_entry,
80 * ip6t_entry and arpt_entry. This sucks, and it is a hack. It will be my
81 * personal pleasure to remove it -HW
91 #define XT_ALIGN(s) (((s) + (__alignof__(struct _xt_align)-1)) \
92 & ~(__alignof__(struct _xt_align)-1))
94 /* Standard return verdict, or do jump. */
95 #define XT_STANDARD_TARGET ""
97 #define XT_ERROR_TARGET "ERROR"
100 * New IP firewall options for [gs]etsockopt at the RAW IP level.
101 * Unlike BSD Linux inherits IP options so you don't have to use a raw
102 * socket for this. Instead we check rights in the calls. */
103 #define XT_BASE_CTL 64 /* base for firewall socket options */
105 #define XT_SO_SET_REPLACE (XT_BASE_CTL)
106 #define XT_SO_SET_ADD_COUNTERS (XT_BASE_CTL + 1)
107 #define XT_SO_SET_MAX XT_SO_SET_ADD_COUNTERS
109 #define XT_SO_GET_INFO (XT_BASE_CTL)
110 #define XT_SO_GET_ENTRIES (XT_BASE_CTL + 1)
111 #define XT_SO_GET_REVISION_MATCH (XT_BASE_CTL + 2)
112 #define XT_SO_GET_REVISION_TARGET (XT_BASE_CTL + 3)
113 #define XT_SO_GET_MAX XT_SO_GET_REVISION_TARGET
115 #define SET_COUNTER(c,b,p) do { (c).bcnt = (b); (c).pcnt = (p); } while(0)
116 #define ADD_COUNTER(c,b,p) do { (c).bcnt += (b); (c).pcnt += (p); } while(0)
120 u_int64_t pcnt, bcnt; /* Packet and byte counters */
123 /* The argument to IPT_SO_ADD_COUNTERS. */
124 struct xt_counters_info
127 char name[XT_TABLE_MAXNAMELEN];
129 unsigned int num_counters;
131 /* The counters (actually `number' of these). */
132 struct xt_counters counters[0];
135 #define XT_INV_PROTO 0x40 /* Invert the sense of PROTO. */
139 #include <linux/netdevice.h>
141 #define ASSERT_READ_LOCK(x)
142 #define ASSERT_WRITE_LOCK(x)
143 #include <linux/netfilter_ipv4/listhelp.h>
146 #define COMPAT_TO_USER 1
147 #define COMPAT_FROM_USER -1
148 #define COMPAT_CALC_SIZE 0
153 struct list_head list;
155 const char name[XT_FUNCTION_MAXNAMELEN-1];
157 /* Return true or false: return FALSE and set *hotdrop = 1 to
158 force immediate packet drop. */
159 /* Arguments changed since 2.6.9, as this must now handle
160 non-linear skb, using skb_header_pointer and
161 skb_ip_make_writable. */
162 int (*match)(const struct sk_buff *skb,
163 const struct net_device *in,
164 const struct net_device *out,
165 const struct xt_match *match,
166 const void *matchinfo,
168 unsigned int protoff,
171 /* Called when user tries to insert an entry of this type. */
172 /* Should return true or false. */
173 int (*checkentry)(const char *tablename,
175 const struct xt_match *match,
177 unsigned int hook_mask);
179 /* Called when entry of this type deleted. */
180 void (*destroy)(const struct xt_match *match, void *matchinfo);
182 /* Called when userspace align differs from kernel space one */
183 int (*compat)(void *match, void **dstptr, int *size, int convert);
185 /* Set this to THIS_MODULE if you are a module, otherwise NULL */
188 /* Free to use by each match */
192 unsigned int matchsize;
194 unsigned short proto;
196 unsigned short family;
200 /* Registration hooks for targets. */
203 struct list_head list;
205 const char name[XT_FUNCTION_MAXNAMELEN-1];
207 /* Returns verdict. Argument order changed since 2.6.9, as this
208 must now handle non-linear skbs, using skb_copy_bits and
209 skb_ip_make_writable. */
210 unsigned int (*target)(struct sk_buff **pskb,
211 const struct net_device *in,
212 const struct net_device *out,
213 unsigned int hooknum,
214 const struct xt_target *target,
215 const void *targinfo);
217 /* Called when user tries to insert an entry of this type:
218 hook_mask is a bitmask of hooks from which it can be
220 /* Should return true or false. */
221 int (*checkentry)(const char *tablename,
223 const struct xt_target *target,
225 unsigned int hook_mask);
227 /* Called when entry of this type deleted. */
228 void (*destroy)(const struct xt_target *target, void *targinfo);
230 /* Called when userspace align differs from kernel space one */
231 int (*compat)(void *target, void **dstptr, int *size, int convert);
233 /* Set this to THIS_MODULE if you are a module, otherwise NULL */
237 unsigned int targetsize;
239 unsigned short proto;
241 unsigned short family;
245 /* Furniture shopping... */
248 struct list_head list;
250 /* A unique name... */
251 char name[XT_TABLE_MAXNAMELEN];
253 /* What hooks you will enter on */
254 unsigned int valid_hooks;
256 /* Lock for the curtain */
259 /* Man behind the curtain... */
260 //struct ip6t_table_info *private;
263 /* Set this to THIS_MODULE if you are a module, otherwise NULL */
266 int af; /* address/protocol family */
269 #include <linux/netfilter_ipv4.h>
271 /* The table itself */
276 /* Number of entries: FIXME. --RR */
278 /* Initial number of entries. Needed for module usage count */
279 unsigned int initial_entries;
281 /* Entry points and underflows */
282 unsigned int hook_entry[NF_IP_NUMHOOKS];
283 unsigned int underflow[NF_IP_NUMHOOKS];
285 /* ipt_entry tables: one per CPU */
286 char *entries[NR_CPUS];
289 extern int xt_register_target(struct xt_target *target);
290 extern void xt_unregister_target(struct xt_target *target);
291 extern int xt_register_targets(struct xt_target *target, unsigned int n);
292 extern void xt_unregister_targets(struct xt_target *target, unsigned int n);
294 extern int xt_register_match(struct xt_match *target);
295 extern void xt_unregister_match(struct xt_match *target);
296 extern int xt_register_matches(struct xt_match *match, unsigned int n);
297 extern void xt_unregister_matches(struct xt_match *match, unsigned int n);
299 extern int xt_check_match(const struct xt_match *match, unsigned short family,
300 unsigned int size, const char *table, unsigned int hook,
301 unsigned short proto, int inv_proto);
302 extern int xt_check_target(const struct xt_target *target, unsigned short family,
303 unsigned int size, const char *table, unsigned int hook,
304 unsigned short proto, int inv_proto);
306 extern int xt_register_table(struct xt_table *table,
307 struct xt_table_info *bootstrap,
308 struct xt_table_info *newinfo);
309 extern void *xt_unregister_table(struct xt_table *table);
311 extern struct xt_table_info *xt_replace_table(struct xt_table *table,
312 unsigned int num_counters,
313 struct xt_table_info *newinfo,
316 extern struct xt_match *xt_find_match(int af, const char *name, u8 revision);
317 extern struct xt_target *xt_find_target(int af, const char *name, u8 revision);
318 extern struct xt_target *xt_request_find_target(int af, const char *name,
320 extern int xt_find_revision(int af, const char *name, u8 revision, int target,
323 extern struct xt_table *xt_find_table_lock(int af, const char *name);
324 extern void xt_table_unlock(struct xt_table *t);
326 extern int xt_proto_init(int af);
327 extern void xt_proto_fini(int af);
329 extern struct xt_table_info *xt_alloc_table_info(unsigned int size);
330 extern void xt_free_table_info(struct xt_table_info *info);
333 #include <net/compat.h>
335 struct compat_xt_entry_match
339 u_int16_t match_size;
340 char name[XT_FUNCTION_MAXNAMELEN - 1];
344 u_int16_t match_size;
347 u_int16_t match_size;
349 unsigned char data[0];
352 struct compat_xt_entry_target
356 u_int16_t target_size;
357 char name[XT_FUNCTION_MAXNAMELEN - 1];
361 u_int16_t target_size;
362 compat_uptr_t target;
364 u_int16_t target_size;
366 unsigned char data[0];
369 /* FIXME: this works only on 32 bit tasks
370 * need to change whole approach in order to calculate align as function of
371 * current task alignment */
373 struct compat_xt_counters
375 #if defined(CONFIG_X86_64) || defined(CONFIG_IA64)
382 struct compat_xt_counters_info
384 char name[XT_TABLE_MAXNAMELEN];
385 compat_uint_t num_counters;
386 struct compat_xt_counters counters[0];
389 #define COMPAT_XT_ALIGN(s) (((s) + (__alignof__(struct compat_xt_counters)-1)) \
390 & ~(__alignof__(struct compat_xt_counters)-1))
392 extern void xt_compat_lock(int af);
393 extern void xt_compat_unlock(int af);
394 extern int xt_compat_match(void *match, void **dstptr, int *size, int convert);
395 extern int xt_compat_target(void *target, void **dstptr, int *size,
398 #endif /* CONFIG_COMPAT */
399 #endif /* __KERNEL__ */
401 #endif /* _X_TABLES_H */