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 */