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(int pf,
27 extern int nf_conntrack_init(void);
28 extern void nf_conntrack_cleanup(void);
30 extern int nf_conntrack_proto_init(void);
31 extern void nf_conntrack_proto_fini(void);
33 extern int nf_conntrack_helper_init(void);
34 extern void nf_conntrack_helper_fini(void);
36 struct nf_conntrack_l3proto;
37 extern struct nf_conntrack_l3proto *nf_ct_find_l3proto(u_int16_t pf);
38 /* Like above, but you already have conntrack read lock. */
39 extern struct nf_conntrack_l3proto *__nf_ct_find_l3proto(u_int16_t l3proto);
41 struct nf_conntrack_l4proto;
44 nf_ct_get_tuple(const struct sk_buff *skb,
49 struct nf_conntrack_tuple *tuple,
50 const struct nf_conntrack_l3proto *l3proto,
51 const struct nf_conntrack_l4proto *l4proto);
54 nf_ct_invert_tuple(struct nf_conntrack_tuple *inverse,
55 const struct nf_conntrack_tuple *orig,
56 const struct nf_conntrack_l3proto *l3proto,
57 const struct nf_conntrack_l4proto *l4proto);
59 /* Find a connection corresponding to a tuple. */
60 extern struct nf_conntrack_tuple_hash *
61 nf_conntrack_find_get(const struct nf_conntrack_tuple *tuple);
63 extern int __nf_conntrack_confirm(struct sk_buff *skb);
65 /* Confirm a connection: returns NF_DROP if packet must be dropped. */
66 static inline int nf_conntrack_confirm(struct sk_buff *skb)
68 struct nf_conn *ct = (struct nf_conn *)skb->nfct;
72 if (!nf_ct_is_confirmed(ct) && !nf_ct_is_dying(ct))
73 ret = __nf_conntrack_confirm(skb);
74 nf_ct_deliver_cached_events(ct);
79 extern void __nf_conntrack_attach(struct sk_buff *nskb, struct sk_buff *skb);
82 print_tuple(struct seq_file *s, const struct nf_conntrack_tuple *tuple,
83 struct nf_conntrack_l3proto *l3proto,
84 struct nf_conntrack_l4proto *proto);
86 extern struct hlist_head *nf_conntrack_hash;
87 extern rwlock_t nf_conntrack_lock ;
88 extern struct hlist_head unconfirmed;
90 #endif /* _NF_CONNTRACK_CORE_H */