1 files changed, 95 insertions, 0 deletions
diff --git a/include/net/netfilter/nf_conntrack_l3proto.h b/include/net/netfilter/nf_conntrack_l3proto.h
new file mode 100644
index 00000000..e8010f44
--- /dev/null
+++ b/include/net/netfilter/nf_conntrack_l3proto.h
@@ -0,0 +1,95 @@
+/*
+ * Copyright (C)2003,2004 USAGI/WIDE Project
+ *
+ * Header for use in defining a given L3 protocol for connection tracking.
+ *
+ * Author:
+ *	Yasuyuki Kozakai @USAGI	<yasuyuki.kozakai@toshiba.co.jp>
+ *
+ * Derived from include/netfilter_ipv4/ip_conntrack_protocol.h
+ */
+
+#ifndef _NF_CONNTRACK_L3PROTO_H
+#define _NF_CONNTRACK_L3PROTO_H
+#include <linux/netlink.h>
+#include <net/netlink.h>
+#include <linux/seq_file.h>
+#include <net/netfilter/nf_conntrack.h>
+
+struct nf_conntrack_l3proto {
+	/* L3 Protocol Family number. ex) PF_INET */
+	u_int16_t l3proto;
+
+	/* Protocol name */
+	const char *name;
+
+	/*
+	 * Try to fill in the third arg: nhoff is offset of l3 proto
+         * hdr.  Return true if possible.
+	 */
+	bool (*pkt_to_tuple)(const struct sk_buff *skb, unsigned int nhoff,
+			     struct nf_conntrack_tuple *tuple);
+
+	/*
+	 * Invert the per-proto part of the tuple: ie. turn xmit into reply.
+	 * Some packets can't be inverted: return 0 in that case.
+	 */
+	bool (*invert_tuple)(struct nf_conntrack_tuple *inverse,
+			     const struct nf_conntrack_tuple *orig);
+
+	/* Print out the per-protocol part of the tuple. */
+	int (*print_tuple)(struct seq_file *s,
+			   const struct nf_conntrack_tuple *);
+
+	/*
+	 * Called before tracking. 
+	 *	*dataoff: offset of protocol header (TCP, UDP,...) in skb
+	 *	*protonum: protocol number
+	 */
+	int (*get_l4proto)(const struct sk_buff *skb, unsigned int nhoff,
+			   unsigned int *dataoff, u_int8_t *protonum);
+
+	int (*tuple_to_nlattr)(struct sk_buff *skb,
+			       const struct nf_conntrack_tuple *t);
+
+	/*
+	 * Calculate size of tuple nlattr
+	 */
+	int (*nlattr_tuple_size)(void);
+
+	int (*nlattr_to_tuple)(struct nlattr *tb[],
+			       struct nf_conntrack_tuple *t);
+	const struct nla_policy *nla_policy;
+
+	size_t nla_size;
+
+#ifdef CONFIG_SYSCTL
+	struct ctl_table_header	*ctl_table_header;
+	struct ctl_path		*ctl_table_path;
+	struct ctl_table	*ctl_table;
+#endif /* CONFIG_SYSCTL */
+
+	/* Module (if any) which this is connected to. */
+	struct module *me;
+};
+
+extern struct nf_conntrack_l3proto __rcu *nf_ct_l3protos[AF_MAX];
+
+/* Protocol registration. */
+extern int nf_conntrack_l3proto_register(struct nf_conntrack_l3proto *proto);
+extern void nf_conntrack_l3proto_unregister(struct nf_conntrack_l3proto *proto);
+extern struct nf_conntrack_l3proto *nf_ct_l3proto_find_get(u_int16_t l3proto);
+extern void nf_ct_l3proto_put(struct nf_conntrack_l3proto *p);
+
+/* Existing built-in protocols */
+extern struct nf_conntrack_l3proto nf_conntrack_l3proto_generic;
+
+static inline struct nf_conntrack_l3proto *
+__nf_ct_l3proto_find(u_int16_t l3proto)
+{
+	if (unlikely(l3proto >= AF_MAX))
+		return &nf_conntrack_l3proto_generic;
+	return rcu_dereference(nf_ct_l3protos[l3proto]);
+}
+
+#endif /*_NF_CONNTRACK_L3PROTO_H*/