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>
16 #include <net/netfilter/nf_conntrack_l3proto.h>
17 #include <net/netfilter/nf_conntrack_l4proto.h>
18 #include <net/netfilter/nf_conntrack_ecache.h>
20 /* This header is used to share core functionality between the
21 standalone connection tracking module, and the compatibility layer's use
22 of connection tracking. */
23 extern unsigned int nf_conntrack_in(struct net
*net
,
28 extern int nf_conntrack_init(struct net
*net
);
29 extern void nf_conntrack_cleanup(struct net
*net
);
31 extern int nf_conntrack_proto_init(void);
32 extern void nf_conntrack_proto_fini(void);
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_l4proto
*l4proto
);
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_l4proto
*l4proto
);
50 /* Find a connection corresponding to a tuple. */
51 extern struct nf_conntrack_tuple_hash
*
52 nf_conntrack_find_get(struct net
*net
, u16 zone
,
53 const struct nf_conntrack_tuple
*tuple
);
55 extern int __nf_conntrack_confirm(struct sk_buff
*skb
);
57 /* Confirm a connection: returns NF_DROP if packet must be dropped. */
58 static inline int nf_conntrack_confirm(struct sk_buff
*skb
)
60 struct nf_conn
*ct
= (struct nf_conn
*)skb
->nfct
;
63 if (ct
&& !nf_ct_is_untracked(ct
)) {
64 if (!nf_ct_is_confirmed(ct
))
65 ret
= __nf_conntrack_confirm(skb
);
66 if (likely(ret
== NF_ACCEPT
))
67 nf_ct_deliver_cached_events(ct
);
73 print_tuple(struct seq_file
*s
, const struct nf_conntrack_tuple
*tuple
,
74 const struct nf_conntrack_l3proto
*l3proto
,
75 const struct nf_conntrack_l4proto
*proto
);
77 extern spinlock_t nf_conntrack_lock
;
79 #endif /* _NF_CONNTRACK_CORE_H */