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[NETFILTER]: nf_nat: use extension infrastructure

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Signed-off-by: Yasuyuki Kozakai <[email protected]>
Signed-off-by: Patrick McHardy <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Yasuyuki Kozakai 2007-07-07 22:24:28 -07:00 • committed by David S. Miller
commit 2d59e5ca8c
6 changed files with 73 additions and 36 deletions
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17
include/net/netfilter/nf_conntrack.h
View file

@ -278,22 +278,5 @@ nf_conntrack_register_cache(u_int32_t features, const char *name, size_t size);
extern void
nf_conntrack_unregister_cache(u_int32_t features);
/* valid combinations:
* basic: nf_conn, nf_conn .. nf_conn_help
* nat: nf_conn .. nf_conn_nat, nf_conn .. nf_conn_nat .. nf_conn help
*/
#ifdef CONFIG_NF_NAT_NEEDED
#include <net/netfilter/nf_nat.h>
static inline struct nf_conn_nat *nfct_nat(const struct nf_conn *ct)
{
unsigned int offset = sizeof(struct nf_conn);
if (!(ct->features & NF_CT_F_NAT))
return NULL;
offset = ALIGN(offset, __alignof__(struct nf_conn_nat));
return (struct nf_conn_nat *) ((void *)ct + offset);
}
#endif /* CONFIG_NF_NAT_NEEDED */
#endif /* __KERNEL__ */
#endif /* _NF_CONNTRACK_H */

2
include/net/netfilter/nf_conntrack_extend.h
View file

@ -6,10 +6,12 @@
enum nf_ct_ext_id
{
NF_CT_EXT_HELPER,
NF_CT_EXT_NAT,
NF_CT_EXT_NUM,
};
#define NF_CT_EXT_HELPER_TYPE struct nf_conn_help
#define NF_CT_EXT_NAT_TYPE struct nf_conn_nat
/* Extensions: optional stuff which isn't permanently in struct. */
struct nf_ct_ext {

6
include/net/netfilter/nf_nat.h
View file

@ -52,6 +52,7 @@ struct nf_nat_multi_range_compat
#ifdef __KERNEL__
#include <linux/list.h>
#include <linux/netfilter/nf_conntrack_pptp.h>
#include <net/netfilter/nf_conntrack_extend.h>
struct nf_conn;
@ -89,6 +90,11 @@ extern unsigned int nf_nat_setup_info(struct nf_conn *ct,
extern int nf_nat_used_tuple(const struct nf_conntrack_tuple *tuple,
const struct nf_conn *ignored_conntrack);
static inline struct nf_conn_nat *nfct_nat(const struct nf_conn *ct)
{
return nf_ct_ext_find(ct, NF_CT_EXT_NAT);
}
extern int nf_nat_module_is_loaded;
#else /* !__KERNEL__: iptables wants this to compile. */