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>
147 struct list_head list;
149 const char name[XT_FUNCTION_MAXNAMELEN-1];
151 /* Return true or false: return FALSE and set *hotdrop = 1 to
152 force immediate packet drop. */
153 /* Arguments changed since 2.6.9, as this must now handle
154 non-linear skb, using skb_header_pointer and
155 skb_ip_make_writable. */
156 int (*match)(const struct sk_buff *skb,
157 const struct net_device *in,
158 const struct net_device *out,
159 const struct xt_match *match,
160 const void *matchinfo,
162 unsigned int protoff,
165 /* Called when user tries to insert an entry of this type. */
166 /* Should return true or false. */
167 int (*checkentry)(const char *tablename,
169 const struct xt_match *match,
171 unsigned int matchinfosize,
172 unsigned int hook_mask);
174 /* Called when entry of this type deleted. */
175 void (*destroy)(const struct xt_match *match, void *matchinfo,
176 unsigned int matchinfosize);
178 /* Set this to THIS_MODULE if you are a module, otherwise NULL */
182 unsigned int matchsize;
184 unsigned short proto;
186 unsigned short family;
190 /* Registration hooks for targets. */
193 struct list_head list;
195 const char name[XT_FUNCTION_MAXNAMELEN-1];
197 /* Returns verdict. Argument order changed since 2.6.9, as this
198 must now handle non-linear skbs, using skb_copy_bits and
199 skb_ip_make_writable. */
200 unsigned int (*target)(struct sk_buff **pskb,
201 const struct net_device *in,
202 const struct net_device *out,
203 unsigned int hooknum,
204 const struct xt_target *target,
205 const void *targinfo,
208 /* Called when user tries to insert an entry of this type:
209 hook_mask is a bitmask of hooks from which it can be
211 /* Should return true or false. */
212 int (*checkentry)(const char *tablename,
214 const struct xt_target *target,
216 unsigned int targinfosize,
217 unsigned int hook_mask);
219 /* Called when entry of this type deleted. */
220 void (*destroy)(const struct xt_target *target, void *targinfo,
221 unsigned int targinfosize);
223 /* Set this to THIS_MODULE if you are a module, otherwise NULL */
227 unsigned int targetsize;
229 unsigned short proto;
231 unsigned short family;
235 /* Furniture shopping... */
238 struct list_head list;
240 /* A unique name... */
241 char name[XT_TABLE_MAXNAMELEN];
243 /* What hooks you will enter on */
244 unsigned int valid_hooks;
246 /* Lock for the curtain */
249 /* Man behind the curtain... */
250 //struct ip6t_table_info *private;
253 /* Set this to THIS_MODULE if you are a module, otherwise NULL */
256 int af; /* address/protocol family */
259 #include <linux/netfilter_ipv4.h>
261 /* The table itself */
266 /* Number of entries: FIXME. --RR */
268 /* Initial number of entries. Needed for module usage count */
269 unsigned int initial_entries;
271 /* Entry points and underflows */
272 unsigned int hook_entry[NF_IP_NUMHOOKS];
273 unsigned int underflow[NF_IP_NUMHOOKS];
275 /* ipt_entry tables: one per CPU */
276 char *entries[NR_CPUS];
279 extern int xt_register_target(struct xt_target *target);
280 extern void xt_unregister_target(struct xt_target *target);
281 extern int xt_register_match(struct xt_match *target);
282 extern void xt_unregister_match(struct xt_match *target);
284 extern int xt_check_match(const struct xt_match *match, unsigned short family,
285 unsigned int size, const char *table, unsigned int hook,
286 unsigned short proto, int inv_proto);
287 extern int xt_check_target(const struct xt_target *target, unsigned short family,
288 unsigned int size, const char *table, unsigned int hook,
289 unsigned short proto, int inv_proto);
291 extern int xt_register_table(struct xt_table *table,
292 struct xt_table_info *bootstrap,
293 struct xt_table_info *newinfo);
294 extern void *xt_unregister_table(struct xt_table *table);
296 extern struct xt_table_info *xt_replace_table(struct xt_table *table,
297 unsigned int num_counters,
298 struct xt_table_info *newinfo,
301 extern struct xt_match *xt_find_match(int af, const char *name, u8 revision);
302 extern struct xt_target *xt_find_target(int af, const char *name, u8 revision);
303 extern struct xt_target *xt_request_find_target(int af, const char *name,
305 extern int xt_find_revision(int af, const char *name, u8 revision, int target,
308 extern struct xt_table *xt_find_table_lock(int af, const char *name);
309 extern void xt_table_unlock(struct xt_table *t);
311 extern int xt_proto_init(int af);
312 extern void xt_proto_fini(int af);
314 extern struct xt_table_info *xt_alloc_table_info(unsigned int size);
315 extern void xt_free_table_info(struct xt_table_info *info);
317 #endif /* __KERNEL__ */
319 #endif /* _X_TABLES_H */