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15#ifndef _IPTABLES_H
16#define _IPTABLES_H
17
18#include <linux/if.h>
19#include <linux/in.h>
20#include <linux/init.h>
21#include <linux/ip.h>
22#include <linux/skbuff.h>
23#include <uapi/linux/netfilter_ipv4/ip_tables.h>
24
25int ipt_register_table(struct net *net, const struct xt_table *table,
26 const struct ipt_replace *repl,
27 const struct nf_hook_ops *ops, struct xt_table **res);
28void ipt_unregister_table(struct net *net, struct xt_table *table,
29 const struct nf_hook_ops *ops);
30
31
32struct ipt_standard {
33 struct ipt_entry entry;
34 struct xt_standard_target target;
35};
36
37struct ipt_error {
38 struct ipt_entry entry;
39 struct xt_error_target target;
40};
41
42#define IPT_ENTRY_INIT(__size) \
43{ \
44 .target_offset = sizeof(struct ipt_entry), \
45 .next_offset = (__size), \
46}
47
48#define IPT_STANDARD_INIT(__verdict) \
49{ \
50 .entry = IPT_ENTRY_INIT(sizeof(struct ipt_standard)), \
51 .target = XT_TARGET_INIT(XT_STANDARD_TARGET, \
52 sizeof(struct xt_standard_target)), \
53 .target.verdict = -(__verdict) - 1, \
54}
55
56#define IPT_ERROR_INIT \
57{ \
58 .entry = IPT_ENTRY_INIT(sizeof(struct ipt_error)), \
59 .target = XT_TARGET_INIT(XT_ERROR_TARGET, \
60 sizeof(struct xt_error_target)), \
61 .target.errorname = "ERROR", \
62}
63
64extern void *ipt_alloc_initial_table(const struct xt_table *);
65extern unsigned int ipt_do_table(struct sk_buff *skb,
66 const struct nf_hook_state *state,
67 struct xt_table *table);
68
69#ifdef CONFIG_COMPAT
70#include <net/compat.h>
71
72struct compat_ipt_entry {
73 struct ipt_ip ip;
74 compat_uint_t nfcache;
75 __u16 target_offset;
76 __u16 next_offset;
77 compat_uint_t comefrom;
78 struct compat_xt_counters counters;
79 unsigned char elems[];
80};
81
82
83static inline struct xt_entry_target *
84compat_ipt_get_target(struct compat_ipt_entry *e)
85{
86 return (void *)e + e->target_offset;
87}
88
89#endif
90#endif
91