1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * 25-Jul-1998 Major changes to allow for ip chain table
4  *
5  * 3-Jan-2000 Named tables to allow packet selection for different uses.
6  */
7 
8 /*
9  * 	Format of an IP6 firewall descriptor
10  *
11  * 	src, dst, src_mask, dst_mask are always stored in network byte order.
12  * 	flags are stored in host byte order (of course).
13  * 	Port numbers are stored in HOST byte order.
14  */
15 #ifndef _IP6_TABLES_H
16 #define _IP6_TABLES_H
17 
18 #include <linux/if.h>
19 #include <linux/in6.h>
20 #include <linux/init.h>
21 #include <linux/ipv6.h>
22 #include <linux/skbuff.h>
23 #include <uapi/linux/netfilter_ipv6/ip6_tables.h>
24 
25 extern void *ip6t_alloc_initial_table(const struct xt_table *);
26 
27 int ip6t_register_table(struct net *net, const struct xt_table *table,
28 			const struct ip6t_replace *repl,
29 			const struct nf_hook_ops *ops);
30 void ip6t_unregister_table_pre_exit(struct net *net, const char *name);
31 void ip6t_unregister_table_exit(struct net *net, const char *name);
32 extern unsigned int ip6t_do_table(void *priv, struct sk_buff *skb,
33 				  const struct nf_hook_state *state);
34 
35 #ifdef CONFIG_NETFILTER_XTABLES_COMPAT
36 #include <net/compat.h>
37 
38 struct compat_ip6t_entry {
39 	struct ip6t_ip6 ipv6;
40 	compat_uint_t nfcache;
41 	__u16 target_offset;
42 	__u16 next_offset;
43 	compat_uint_t comefrom;
44 	struct compat_xt_counters counters;
45 	unsigned char elems[];
46 };
47 
48 static inline struct xt_entry_target *
compat_ip6t_get_target(struct compat_ip6t_entry * e)49 compat_ip6t_get_target(struct compat_ip6t_entry *e)
50 {
51 	return (void *)e + e->target_offset;
52 }
53 
54 #endif /* CONFIG_COMPAT */
55 #endif /* _IP6_TABLES_H */
56