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14#ifndef _IPTABLES_H
15#define _IPTABLES_H
16
17#include <linux/if.h>
18#include <linux/in.h>
19#include <linux/ip.h>
20#include <linux/skbuff.h>
21
22#include <linux/init.h>
23#include <uapi/linux/netfilter_ipv4/ip_tables.h>
24
25extern void ipt_init(void) __init;
26
27extern struct xt_table *ipt_register_table(struct net *net,
28 const struct xt_table *table,
29 const struct ipt_replace *repl);
30extern void ipt_unregister_table(struct net *net, struct xt_table *table);
31
32
33struct ipt_standard {
34 struct ipt_entry entry;
35 struct xt_standard_target target;
36};
37
38struct ipt_error {
39 struct ipt_entry entry;
40 struct xt_error_target target;
41};
42
43#define IPT_ENTRY_INIT(__size) \
44{ \
45 .target_offset = sizeof(struct ipt_entry), \
46 .next_offset = (__size), \
47}
48
49#define IPT_STANDARD_INIT(__verdict) \
50{ \
51 .entry = IPT_ENTRY_INIT(sizeof(struct ipt_standard)), \
52 .target = XT_TARGET_INIT(XT_STANDARD_TARGET, \
53 sizeof(struct xt_standard_target)), \
54 .target.verdict = -(__verdict) - 1, \
55}
56
57#define IPT_ERROR_INIT \
58{ \
59 .entry = IPT_ENTRY_INIT(sizeof(struct ipt_error)), \
60 .target = XT_TARGET_INIT(XT_ERROR_TARGET, \
61 sizeof(struct xt_error_target)), \
62 .target.errorname = "ERROR", \
63}
64
65extern void *ipt_alloc_initial_table(const struct xt_table *);
66extern unsigned int ipt_do_table(struct sk_buff *skb,
67 unsigned int hook,
68 const struct nf_hook_state *state,
69 struct xt_table *table);
70
71#ifdef CONFIG_COMPAT
72#include <net/compat.h>
73
74struct compat_ipt_entry {
75 struct ipt_ip ip;
76 compat_uint_t nfcache;
77 __u16 target_offset;
78 __u16 next_offset;
79 compat_uint_t comefrom;
80 struct compat_xt_counters counters;
81 unsigned char elems[0];
82};
83
84
85static inline struct xt_entry_target *
86compat_ipt_get_target(struct compat_ipt_entry *e)
87{
88 return (void *)e + e->target_offset;
89}
90
91#endif
92#endif
93