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_net(struct net *net);
29 extern void nf_conntrack_cleanup_net(struct net *net);
30 extern void nf_conntrack_cleanup_net_list(struct list_head *net_exit_list);
32 extern int nf_conntrack_proto_pernet_init(struct net *net);
33 extern void nf_conntrack_proto_pernet_fini(struct net *net);
35 extern int nf_conntrack_proto_init(void);
36 extern void nf_conntrack_proto_fini(void);
38 extern int nf_conntrack_init_start(void);
39 extern void nf_conntrack_cleanup_start(void);
41 extern void nf_conntrack_init_end(void);
42 extern void nf_conntrack_cleanup_end(void);
45 nf_ct_get_tuple(const struct sk_buff *skb,
50 struct nf_conntrack_tuple *tuple,
51 const struct nf_conntrack_l3proto *l3proto,
52 const struct nf_conntrack_l4proto *l4proto);
55 nf_ct_invert_tuple(struct nf_conntrack_tuple *inverse,
56 const struct nf_conntrack_tuple *orig,
57 const struct nf_conntrack_l3proto *l3proto,
58 const struct nf_conntrack_l4proto *l4proto);
60 /* Find a connection corresponding to a tuple. */
61 extern struct nf_conntrack_tuple_hash *
62 nf_conntrack_find_get(struct net *net, u16 zone,
63 const struct nf_conntrack_tuple *tuple);
65 extern int __nf_conntrack_confirm(struct sk_buff *skb);
67 /* Confirm a connection: returns NF_DROP if packet must be dropped. */
68 static inline int nf_conntrack_confirm(struct sk_buff *skb)
70 struct nf_conn *ct = (struct nf_conn *)skb->nfct;
73 if (ct && !nf_ct_is_untracked(ct)) {
74 if (!nf_ct_is_confirmed(ct))
75 ret = __nf_conntrack_confirm(skb);
76 if (likely(ret == NF_ACCEPT))
77 nf_ct_deliver_cached_events(ct);
83 print_tuple(struct seq_file *s, const struct nf_conntrack_tuple *tuple,
84 const struct nf_conntrack_l3proto *l3proto,
85 const struct nf_conntrack_l4proto *proto);
87 extern spinlock_t nf_conntrack_lock ;
89 #endif /* _NF_CONNTRACK_CORE_H */