4 #define XT_FUNCTION_MAXNAMELEN 30
5 #define XT_TABLE_MAXNAMELEN 32
7 /* The argument to IPT_SO_GET_REVISION_*. Returns highest revision
8 * kernel supports, if >= revision. */
11 char name[XT_FUNCTION_MAXNAMELEN-1];
16 /* CONTINUE verdict for targets */
17 #define XT_CONTINUE 0xFFFFFFFF
19 /* For standard target */
20 #define XT_RETURN (-NF_REPEAT - 1)
22 /* this is a dummy structure to find out the alignment requirement for a struct
23 * containing all the fundamental data types that are used in ipt_entry,
24 * ip6t_entry and arpt_entry. This sucks, and it is a hack. It will be my
25 * personal pleasure to remove it -HW
35 #define XT_ALIGN(s) (((s) + (__alignof__(struct _xt_align)-1)) \
36 & ~(__alignof__(struct _xt_align)-1))
38 /* Standard return verdict, or do jump. */
39 #define XT_STANDARD_TARGET ""
41 #define XT_ERROR_TARGET "ERROR"
44 * New IP firewall options for [gs]etsockopt at the RAW IP level.
45 * Unlike BSD Linux inherits IP options so you don't have to use a raw
46 * socket for this. Instead we check rights in the calls. */
47 #define XT_BASE_CTL 64 /* base for firewall socket options */
49 #define XT_SO_SET_REPLACE (XT_BASE_CTL)
50 #define XT_SO_SET_ADD_COUNTERS (XT_BASE_CTL + 1)
51 #define XT_SO_SET_MAX XT_SO_SET_ADD_COUNTERS
53 #define XT_SO_GET_INFO (XT_BASE_CTL)
54 #define XT_SO_GET_ENTRIES (XT_BASE_CTL + 1)
55 #define XT_SO_GET_REVISION_MATCH (XT_BASE_CTL + 2)
56 #define XT_SO_GET_REVISION_TARGET (XT_BASE_CTL + 3)
57 #define XT_SO_GET_MAX XT_SO_GET_REVISION_TARGET
59 #define SET_COUNTER(c,b,p) do { (c).bcnt = (b); (c).pcnt = (p); } while(0)
60 #define ADD_COUNTER(c,b,p) do { (c).bcnt += (b); (c).pcnt += (p); } while(0)
64 u_int64_t pcnt, bcnt; /* Packet and byte counters */
67 /* The argument to IPT_SO_ADD_COUNTERS. */
68 struct xt_counters_info
71 char name[XT_TABLE_MAXNAMELEN];
73 unsigned int num_counters;
75 /* The counters (actually `number' of these). */
76 struct xt_counters counters[0];
79 #define XT_INV_PROTO 0x40 /* Invert the sense of PROTO. */
83 #include <linux/netdevice.h>
85 #define ASSERT_READ_LOCK(x)
86 #define ASSERT_WRITE_LOCK(x)
87 #include <linux/netfilter_ipv4/listhelp.h>
91 struct list_head list;
93 const char name[XT_FUNCTION_MAXNAMELEN-1];
95 /* Return true or false: return FALSE and set *hotdrop = 1 to
96 force immediate packet drop. */
97 /* Arguments changed since 2.6.9, as this must now handle
98 non-linear skb, using skb_header_pointer and
99 skb_ip_make_writable. */
100 int (*match)(const struct sk_buff *skb,
101 const struct net_device *in,
102 const struct net_device *out,
103 const struct xt_match *match,
104 const void *matchinfo,
106 unsigned int protoff,
109 /* Called when user tries to insert an entry of this type. */
110 /* Should return true or false. */
111 int (*checkentry)(const char *tablename,
113 const struct xt_match *match,
115 unsigned int matchinfosize,
116 unsigned int hook_mask);
118 /* Called when entry of this type deleted. */
119 void (*destroy)(const struct xt_match *match, void *matchinfo,
120 unsigned int matchinfosize);
122 /* Set this to THIS_MODULE if you are a module, otherwise NULL */
126 unsigned int matchsize;
128 unsigned short proto;
130 unsigned short family;
134 /* Registration hooks for targets. */
137 struct list_head list;
139 const char name[XT_FUNCTION_MAXNAMELEN-1];
141 /* Returns verdict. Argument order changed since 2.6.9, as this
142 must now handle non-linear skbs, using skb_copy_bits and
143 skb_ip_make_writable. */
144 unsigned int (*target)(struct sk_buff **pskb,
145 const struct net_device *in,
146 const struct net_device *out,
147 unsigned int hooknum,
148 const struct xt_target *target,
149 const void *targinfo,
152 /* Called when user tries to insert an entry of this type:
153 hook_mask is a bitmask of hooks from which it can be
155 /* Should return true or false. */
156 int (*checkentry)(const char *tablename,
158 const struct xt_target *target,
160 unsigned int targinfosize,
161 unsigned int hook_mask);
163 /* Called when entry of this type deleted. */
164 void (*destroy)(const struct xt_target *target, void *targinfo,
165 unsigned int targinfosize);
167 /* Set this to THIS_MODULE if you are a module, otherwise NULL */
171 unsigned int targetsize;
173 unsigned short proto;
175 unsigned short family;
179 /* Furniture shopping... */
182 struct list_head list;
184 /* A unique name... */
185 char name[XT_TABLE_MAXNAMELEN];
187 /* What hooks you will enter on */
188 unsigned int valid_hooks;
190 /* Lock for the curtain */
193 /* Man behind the curtain... */
194 //struct ip6t_table_info *private;
197 /* Set this to THIS_MODULE if you are a module, otherwise NULL */
200 int af; /* address/protocol family */
203 #include <linux/netfilter_ipv4.h>
205 /* The table itself */
210 /* Number of entries: FIXME. --RR */
212 /* Initial number of entries. Needed for module usage count */
213 unsigned int initial_entries;
215 /* Entry points and underflows */
216 unsigned int hook_entry[NF_IP_NUMHOOKS];
217 unsigned int underflow[NF_IP_NUMHOOKS];
219 /* ipt_entry tables: one per CPU */
220 char *entries[NR_CPUS];
223 extern int xt_register_target(int af, struct xt_target *target);
224 extern void xt_unregister_target(int af, struct xt_target *target);
225 extern int xt_register_match(int af, struct xt_match *target);
226 extern void xt_unregister_match(int af, struct xt_match *target);
228 extern int xt_check_match(const struct xt_match *match, unsigned short family,
229 unsigned int size, const char *table, unsigned int hook,
230 unsigned short proto, int inv_proto);
231 extern int xt_check_target(const struct xt_target *target, unsigned short family,
232 unsigned int size, const char *table, unsigned int hook,
233 unsigned short proto, int inv_proto);
235 extern int xt_register_table(struct xt_table *table,
236 struct xt_table_info *bootstrap,
237 struct xt_table_info *newinfo);
238 extern void *xt_unregister_table(struct xt_table *table);
240 extern struct xt_table_info *xt_replace_table(struct xt_table *table,
241 unsigned int num_counters,
242 struct xt_table_info *newinfo,
245 extern struct xt_match *xt_find_match(int af, const char *name, u8 revision);
246 extern struct xt_target *xt_find_target(int af, const char *name, u8 revision);
247 extern struct xt_target *xt_request_find_target(int af, const char *name,
249 extern int xt_find_revision(int af, const char *name, u8 revision, int target,
252 extern struct xt_table *xt_find_table_lock(int af, const char *name);
253 extern void xt_table_unlock(struct xt_table *t);
255 extern int xt_proto_init(int af);
256 extern void xt_proto_fini(int af);
258 extern struct xt_table_info *xt_alloc_table_info(unsigned int size);
259 extern void xt_free_table_info(struct xt_table_info *info);
261 #endif /* __KERNEL__ */
263 #endif /* _X_TABLES_H */