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#ifndef _IP_CONNTRACK_CORE_H
#define _IP_CONNTRACK_CORE_H
#include <linux/netfilter.h>
#define MAX_IP_CT_PROTO 256
extern struct ip_conntrack_protocol *ip_ct_protos[MAX_IP_CT_PROTO];
/* This header is used to share core functionality between the
standalone connection tracking module, and the compatibility layer's use
of connection tracking. */
extern unsigned int ip_conntrack_in(unsigned int hooknum,
struct sk_buff **pskb,
const struct net_device *in,
const struct net_device *out,
int (*okfn)(struct sk_buff *));
extern int ip_conntrack_init(void);
extern void ip_conntrack_cleanup(void);
struct ip_conntrack_protocol;
extern int
ip_ct_get_tuple(const struct iphdr *iph,
const struct sk_buff *skb,
unsigned int dataoff,
struct ip_conntrack_tuple *tuple,
const struct ip_conntrack_protocol *protocol);
extern int
ip_ct_invert_tuple(struct ip_conntrack_tuple *inverse,
const struct ip_conntrack_tuple *orig,
const struct ip_conntrack_protocol *protocol);
/* Find a connection corresponding to a tuple. */
struct ip_conntrack_tuple_hash *
ip_conntrack_find_get(const struct ip_conntrack_tuple *tuple,
const struct ip_conntrack *ignored_conntrack);
extern int __ip_conntrack_confirm(struct sk_buff **pskb);
/* Confirm a connection: returns NF_DROP if packet must be dropped. */
static inline int ip_conntrack_confirm(struct sk_buff **pskb)
{
struct ip_conntrack *ct = (struct ip_conntrack *)(*pskb)->nfct;
int ret = NF_ACCEPT;
if (ct) {
if (!is_confirmed(ct))
ret = __ip_conntrack_confirm(pskb);
ip_ct_deliver_cached_events(ct);
}
return ret;
}
extern void ip_ct_unlink_expect(struct ip_conntrack_expect *exp);
extern struct list_head *ip_conntrack_hash;
extern struct list_head ip_conntrack_expect_list;
extern rwlock_t ip_conntrack_lock;
#endif /* _IP_CONNTRACK_CORE_H */
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