1 /* SPDX-License-Identifier: GPL-2.0 */
3 * This header is used to share core functionality between the
4 * standalone connection tracking module, and the compatibility layer's use
5 * of connection tracking.
7 * 16 Dec 2003: Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp>
8 * - generalize L3 protocol dependent part.
10 * Derived from include/linux/netfiter_ipv4/ip_conntrack_core.h
13 #ifndef _NF_CONNTRACK_CORE_H
14 #define _NF_CONNTRACK_CORE_H
16 #include <linux/netfilter.h>
17 #include <net/netfilter/nf_conntrack.h>
18 #include <net/netfilter/nf_conntrack_ecache.h>
19 #include <net/netfilter/nf_conntrack_l4proto.h>
21 /* This header is used to share core functionality between the
22 standalone connection tracking module, and the compatibility layer's use
23 of connection tracking. */
25 unsigned int nf_conntrack_in(struct sk_buff *skb,
26 const struct nf_hook_state *state);
28 int nf_conntrack_init_net(struct net *net);
29 void nf_conntrack_cleanup_net(struct net *net);
30 void nf_conntrack_cleanup_net_list(struct list_head *net_exit_list);
32 void nf_conntrack_proto_pernet_init(struct net *net);
34 int nf_conntrack_proto_init(void);
35 void nf_conntrack_proto_fini(void);
37 int nf_conntrack_init_start(void);
38 void nf_conntrack_cleanup_start(void);
40 void nf_conntrack_init_end(void);
41 void nf_conntrack_cleanup_end(void);
43 bool nf_ct_invert_tuple(struct nf_conntrack_tuple *inverse,
44 const struct nf_conntrack_tuple *orig);
46 /* Find a connection corresponding to a tuple. */
47 struct nf_conntrack_tuple_hash *
48 nf_conntrack_find_get(struct net *net,
49 const struct nf_conntrack_zone *zone,
50 const struct nf_conntrack_tuple *tuple);
52 int __nf_conntrack_confirm(struct sk_buff *skb);
54 /* Confirm a connection: returns NF_DROP if packet must be dropped. */
55 static inline int nf_conntrack_confirm(struct sk_buff *skb)
57 struct nf_conn *ct = (struct nf_conn *)skb_nfct(skb);
61 if (!nf_ct_is_confirmed(ct))
62 ret = __nf_conntrack_confirm(skb);
63 if (likely(ret == NF_ACCEPT))
64 nf_ct_deliver_cached_events(ct);
69 unsigned int nf_confirm(struct sk_buff *skb, unsigned int protoff,
70 struct nf_conn *ct, enum ip_conntrack_info ctinfo);
72 void print_tuple(struct seq_file *s, const struct nf_conntrack_tuple *tuple,
73 const struct nf_conntrack_l4proto *proto);
75 #define CONNTRACK_LOCKS 1024
77 extern spinlock_t nf_conntrack_locks[CONNTRACK_LOCKS];
78 void nf_conntrack_lock(spinlock_t *lock);
80 extern spinlock_t nf_conntrack_expect_lock;
82 #endif /* _NF_CONNTRACK_CORE_H */