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1#ifndef _NF_CONNTRACK_COUNT_H
2#define _NF_CONNTRACK_COUNT_H
3
4#include <linux/list.h>
5#include <linux/spinlock.h>
6#include <net/netfilter/nf_conntrack_tuple.h>
7#include <net/netfilter/nf_conntrack_zones.h>
8
9struct nf_conncount_data;
10
11struct nf_conncount_list {
12 spinlock_t list_lock;
13 u32 last_gc; /* jiffies at most recent gc */
14 struct list_head head; /* connections with the same filtering key */
15 unsigned int count; /* length of list */
16};
17
18struct nf_conncount_data *nf_conncount_init(struct net *net, unsigned int keylen);
19void nf_conncount_destroy(struct net *net, struct nf_conncount_data *data);
20
21unsigned int nf_conncount_count_skb(struct net *net,
22 const struct sk_buff *skb,
23 u16 l3num,
24 struct nf_conncount_data *data,
25 const u32 *key);
26
27int nf_conncount_add_skb(struct net *net, const struct sk_buff *skb,
28 u16 l3num, struct nf_conncount_list *list);
29
30void nf_conncount_list_init(struct nf_conncount_list *list);
31
32bool nf_conncount_gc_list(struct net *net,
33 struct nf_conncount_list *list);
34
35void nf_conncount_cache_free(struct nf_conncount_list *list);
36
37#endif
38

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source code of linux/include/net/netfilter/nf_conntrack_count.h