1 files changed, 52 insertions, 0 deletions
diff --git a/include/linux/netfilter_ipv4/ip_conntrack_core.h b/include/linux/netfilter_ipv4/ip_conntrack_core.h
new file mode 100644
index 00000000000..d84be02cb4f
--- /dev/null
+++ b/include/linux/netfilter_ipv4/ip_conntrack_core.h
@@ -0,0 +1,52 @@
+#ifndef _IP_CONNTRACK_CORE_H
+#define _IP_CONNTRACK_CORE_H
+#include <linux/netfilter.h>
+#include <linux/netfilter_ipv4/lockhelp.h>
+
+/* 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)
+{
+	if ((*pskb)->nfct
+	    && !is_confirmed((struct ip_conntrack *)(*pskb)->nfct))
+		return __ip_conntrack_confirm(pskb);
+	return NF_ACCEPT;
+}
+
+extern struct list_head *ip_conntrack_hash;
+extern struct list_head ip_conntrack_expect_list;
+DECLARE_RWLOCK_EXTERN(ip_conntrack_lock);
+#endif /* _IP_CONNTRACK_CORE_H */
+