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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 */