2 * This header is used to share core functionality between the
3 * standalone connection tracking module, and the compatibility layer's use
4 * of connection tracking.
6 * 16 Dec 2003: Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp>
7 * - generalize L3 protocol dependent part.
9 * Derived from include/linux/netfiter_ipv4/ip_conntrack_core.h
12 #ifndef _NF_CONNTRACK_CORE_H
13 #define _NF_CONNTRACK_CORE_H
15 #include <linux/netfilter.h>
17 /* This header is used to share core functionality between the
18 standalone connection tracking module, and the compatibility layer's use
19 of connection tracking. */
20 extern unsigned int nf_conntrack_in(int pf
,
22 struct sk_buff
**pskb
);
24 extern int nf_conntrack_init(void);
25 extern void nf_conntrack_cleanup(void);
27 struct nf_conntrack_l3proto
;
28 extern struct nf_conntrack_l3proto
*nf_ct_find_l3proto(u_int16_t pf
);
29 /* Like above, but you already have conntrack read lock. */
30 extern struct nf_conntrack_l3proto
*__nf_ct_find_l3proto(u_int16_t l3proto
);
32 struct nf_conntrack_protocol
;
35 nf_ct_get_tuple(const struct sk_buff
*skb
,
40 struct nf_conntrack_tuple
*tuple
,
41 const struct nf_conntrack_l3proto
*l3proto
,
42 const struct nf_conntrack_protocol
*protocol
);
45 nf_ct_invert_tuple(struct nf_conntrack_tuple
*inverse
,
46 const struct nf_conntrack_tuple
*orig
,
47 const struct nf_conntrack_l3proto
*l3proto
,
48 const struct nf_conntrack_protocol
*protocol
);
50 /* Find a connection corresponding to a tuple. */
51 extern struct nf_conntrack_tuple_hash
*
52 nf_conntrack_find_get(const struct nf_conntrack_tuple
*tuple
,
53 const struct nf_conn
*ignored_conntrack
);
55 extern int __nf_conntrack_confirm(struct sk_buff
**pskb
);
57 /* Confirm a connection: returns NF_DROP if packet must be dropped. */
58 static inline int nf_conntrack_confirm(struct sk_buff
**pskb
)
60 struct nf_conn
*ct
= (struct nf_conn
*)(*pskb
)->nfct
;
64 if (!nf_ct_is_confirmed(ct
))
65 ret
= __nf_conntrack_confirm(pskb
);
66 nf_ct_deliver_cached_events(ct
);
71 extern void __nf_conntrack_attach(struct sk_buff
*nskb
, struct sk_buff
*skb
);
73 extern struct list_head
*nf_conntrack_hash
;
74 extern struct list_head nf_conntrack_expect_list
;
75 extern rwlock_t nf_conntrack_lock
;
76 #endif /* _NF_CONNTRACK_CORE_H */