1 files changed, 112 insertions, 0 deletions
diff --git a/include/net/netfilter/nf_conntrack_expect.h b/include/net/netfilter/nf_conntrack_expect.h
new file mode 100644
index 00000000..0f8a8c58
--- /dev/null
+++ b/include/net/netfilter/nf_conntrack_expect.h
@@ -0,0 +1,112 @@
+/*
+ * connection tracking expectations.
+ */
+
+#ifndef _NF_CONNTRACK_EXPECT_H
+#define _NF_CONNTRACK_EXPECT_H
+#include <net/netfilter/nf_conntrack.h>
+
+extern unsigned int nf_ct_expect_hsize;
+extern unsigned int nf_ct_expect_max;
+
+struct nf_conntrack_expect {
+	/* Conntrack expectation list member */
+	struct hlist_node lnode;
+
+	/* Hash member */
+	struct hlist_node hnode;
+
+	/* We expect this tuple, with the following mask */
+	struct nf_conntrack_tuple tuple;
+	struct nf_conntrack_tuple_mask mask;
+
+	/* Function to call after setup and insertion */
+	void (*expectfn)(struct nf_conn *new,
+			 struct nf_conntrack_expect *this);
+
+	/* Helper to assign to new connection */
+	struct nf_conntrack_helper *helper;
+
+	/* The conntrack of the master connection */
+	struct nf_conn *master;
+
+	/* Timer function; deletes the expectation. */
+	struct timer_list timeout;
+
+	/* Usage count. */
+	atomic_t use;
+
+	/* Flags */
+	unsigned int flags;
+
+	/* Expectation class */
+	unsigned int class;
+
+#ifdef CONFIG_NF_NAT_NEEDED
+	__be32 saved_ip;
+	/* This is the original per-proto part, used to map the
+	 * expected connection the way the recipient expects. */
+	union nf_conntrack_man_proto saved_proto;
+	/* Direction relative to the master connection. */
+	enum ip_conntrack_dir dir;
+#endif
+
+	struct rcu_head rcu;
+};
+
+static inline struct net *nf_ct_exp_net(struct nf_conntrack_expect *exp)
+{
+	return nf_ct_net(exp->master);
+}
+
+struct nf_conntrack_expect_policy {
+	unsigned int	max_expected;
+	unsigned int	timeout;
+	const char	*name;
+};
+
+#define NF_CT_EXPECT_CLASS_DEFAULT	0
+
+int nf_conntrack_expect_init(struct net *net);
+void nf_conntrack_expect_fini(struct net *net);
+
+struct nf_conntrack_expect *
+__nf_ct_expect_find(struct net *net, u16 zone,
+		    const struct nf_conntrack_tuple *tuple);
+
+struct nf_conntrack_expect *
+nf_ct_expect_find_get(struct net *net, u16 zone,
+		      const struct nf_conntrack_tuple *tuple);
+
+struct nf_conntrack_expect *
+nf_ct_find_expectation(struct net *net, u16 zone,
+		       const struct nf_conntrack_tuple *tuple);
+
+void nf_ct_unlink_expect_report(struct nf_conntrack_expect *exp,
+				u32 pid, int report);
+static inline void nf_ct_unlink_expect(struct nf_conntrack_expect *exp)
+{
+	nf_ct_unlink_expect_report(exp, 0, 0);
+}
+
+void nf_ct_remove_expectations(struct nf_conn *ct);
+void nf_ct_unexpect_related(struct nf_conntrack_expect *exp);
+void nf_ct_remove_userspace_expectations(void);
+
+/* Allocate space for an expectation: this is mandatory before calling
+   nf_ct_expect_related.  You will have to call put afterwards. */
+struct nf_conntrack_expect *nf_ct_expect_alloc(struct nf_conn *me);
+void nf_ct_expect_init(struct nf_conntrack_expect *, unsigned int, u_int8_t,
+		       const union nf_inet_addr *,
+		       const union nf_inet_addr *,
+		       u_int8_t, const __be16 *, const __be16 *);
+void nf_ct_expect_put(struct nf_conntrack_expect *exp);
+int nf_ct_expect_related_report(struct nf_conntrack_expect *expect, 
+				u32 pid, int report);
+static inline int nf_ct_expect_related(struct nf_conntrack_expect *expect)
+{
+	return nf_ct_expect_related_report(expect, 0, 0);
+}
+
+#endif /*_NF_CONNTRACK_EXPECT_H*/
+