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>
142 #define COMPAT_TO_USER 1
143 #define COMPAT_FROM_USER -1
144 #define COMPAT_CALC_SIZE 0
149 struct list_head list;
151 const char name[XT_FUNCTION_MAXNAMELEN-1];
153 /* Return true or false: return FALSE and set *hotdrop = 1 to
154 force immediate packet drop. */
155 /* Arguments changed since 2.6.9, as this must now handle
156 non-linear skb, using skb_header_pointer and
157 skb_ip_make_writable. */
158 int (*match)(const struct sk_buff *skb,
159 const struct net_device *in,
160 const struct net_device *out,
161 const struct xt_match *match,
162 const void *matchinfo,
164 unsigned int protoff,
167 /* Called when user tries to insert an entry of this type. */
168 /* Should return true or false. */
169 int (*checkentry)(const char *tablename,
171 const struct xt_match *match,
173 unsigned int hook_mask);
175 /* Called when entry of this type deleted. */
176 void (*destroy)(const struct xt_match *match, void *matchinfo);
178 /* Called when userspace align differs from kernel space one */
179 int (*compat)(void *match, void **dstptr, int *size, int convert);
181 /* Set this to THIS_MODULE if you are a module, otherwise NULL */
184 /* Free to use by each match */
188 unsigned int matchsize;
190 unsigned short proto;
192 unsigned short family;
196 /* Registration hooks for targets. */
199 struct list_head list;
201 const char name[XT_FUNCTION_MAXNAMELEN-1];
203 /* Returns verdict. Argument order changed since 2.6.9, as this
204 must now handle non-linear skbs, using skb_copy_bits and
205 skb_ip_make_writable. */
206 unsigned int (*target)(struct sk_buff **pskb,
207 const struct net_device *in,
208 const struct net_device *out,
209 unsigned int hooknum,
210 const struct xt_target *target,
211 const void *targinfo);
213 /* Called when user tries to insert an entry of this type:
214 hook_mask is a bitmask of hooks from which it can be
216 /* Should return true or false. */
217 int (*checkentry)(const char *tablename,
219 const struct xt_target *target,
221 unsigned int hook_mask);
223 /* Called when entry of this type deleted. */
224 void (*destroy)(const struct xt_target *target, void *targinfo);
226 /* Called when userspace align differs from kernel space one */
227 int (*compat)(void *target, void **dstptr, int *size, int convert);
229 /* Set this to THIS_MODULE if you are a module, otherwise NULL */
233 unsigned int targetsize;
235 unsigned short proto;
237 unsigned short family;
241 /* Furniture shopping... */
244 struct list_head list;
246 /* A unique name... */
247 char name[XT_TABLE_MAXNAMELEN];
249 /* What hooks you will enter on */
250 unsigned int valid_hooks;
252 /* Lock for the curtain */
255 /* Man behind the curtain... */
256 //struct ip6t_table_info *private;
259 /* Set this to THIS_MODULE if you are a module, otherwise NULL */
262 int af; /* address/protocol family */
265 #include <linux/netfilter_ipv4.h>
267 /* The table itself */
272 /* Number of entries: FIXME. --RR */
274 /* Initial number of entries. Needed for module usage count */
275 unsigned int initial_entries;
277 /* Entry points and underflows */
278 unsigned int hook_entry[NF_IP_NUMHOOKS];
279 unsigned int underflow[NF_IP_NUMHOOKS];
281 /* ipt_entry tables: one per CPU */
282 char *entries[NR_CPUS];
285 extern int xt_register_target(struct xt_target *target);
286 extern void xt_unregister_target(struct xt_target *target);
287 extern int xt_register_targets(struct xt_target *target, unsigned int n);
288 extern void xt_unregister_targets(struct xt_target *target, unsigned int n);
290 extern int xt_register_match(struct xt_match *target);
291 extern void xt_unregister_match(struct xt_match *target);
292 extern int xt_register_matches(struct xt_match *match, unsigned int n);
293 extern void xt_unregister_matches(struct xt_match *match, unsigned int n);
295 extern int xt_check_match(const struct xt_match *match, unsigned short family,
296 unsigned int size, const char *table, unsigned int hook,
297 unsigned short proto, int inv_proto);
298 extern int xt_check_target(const struct xt_target *target, unsigned short family,
299 unsigned int size, const char *table, unsigned int hook,
300 unsigned short proto, int inv_proto);
302 extern int xt_register_table(struct xt_table *table,
303 struct xt_table_info *bootstrap,
304 struct xt_table_info *newinfo);
305 extern void *xt_unregister_table(struct xt_table *table);
307 extern struct xt_table_info *xt_replace_table(struct xt_table *table,
308 unsigned int num_counters,
309 struct xt_table_info *newinfo,
312 extern struct xt_match *xt_find_match(int af, const char *name, u8 revision);
313 extern struct xt_target *xt_find_target(int af, const char *name, u8 revision);
314 extern struct xt_target *xt_request_find_target(int af, const char *name,
316 extern int xt_find_revision(int af, const char *name, u8 revision, int target,
319 extern struct xt_table *xt_find_table_lock(int af, const char *name);
320 extern void xt_table_unlock(struct xt_table *t);
322 extern int xt_proto_init(int af);
323 extern void xt_proto_fini(int af);
325 extern struct xt_table_info *xt_alloc_table_info(unsigned int size);
326 extern void xt_free_table_info(struct xt_table_info *info);
329 #include <net/compat.h>
331 struct compat_xt_entry_match
335 u_int16_t match_size;
336 char name[XT_FUNCTION_MAXNAMELEN - 1];
340 u_int16_t match_size;
343 u_int16_t match_size;
345 unsigned char data[0];
348 struct compat_xt_entry_target
352 u_int16_t target_size;
353 char name[XT_FUNCTION_MAXNAMELEN - 1];
357 u_int16_t target_size;
358 compat_uptr_t target;
360 u_int16_t target_size;
362 unsigned char data[0];
365 /* FIXME: this works only on 32 bit tasks
366 * need to change whole approach in order to calculate align as function of
367 * current task alignment */
369 struct compat_xt_counters
371 #if defined(CONFIG_X86_64) || defined(CONFIG_IA64)
378 struct compat_xt_counters_info
380 char name[XT_TABLE_MAXNAMELEN];
381 compat_uint_t num_counters;
382 struct compat_xt_counters counters[0];
385 #define COMPAT_XT_ALIGN(s) (((s) + (__alignof__(struct compat_xt_counters)-1)) \
386 & ~(__alignof__(struct compat_xt_counters)-1))
388 extern void xt_compat_lock(int af);
389 extern void xt_compat_unlock(int af);
390 extern int xt_compat_match(void *match, void **dstptr, int *size, int convert);
391 extern int xt_compat_target(void *target, void **dstptr, int *size,
394 #endif /* CONFIG_COMPAT */
395 #endif /* __KERNEL__ */
397 #endif /* _X_TABLES_H */