diff --git a/net/ipv4/udp_impl.h b/net/ipv4/udp_impl.h
new file mode 100644
index 0000000..f6f4277
--- /dev/null
+++ b/net/ipv4/udp_impl.h
@@ -0,0 +1,38 @@
+#ifndef _UDP4_IMPL_H
+#define _UDP4_IMPL_H
+#include <net/udp.h>
+#include <net/udplite.h>
+#include <net/protocol.h>
+#include <net/inet_common.h>
+
+extern int  	__udp4_lib_rcv(struct sk_buff *, struct hlist_head [], int );
+extern void 	__udp4_lib_err(struct sk_buff *, u32, struct hlist_head []);
+
+extern int	__udp_lib_get_port(struct sock *sk, unsigned short snum,
+				   struct hlist_head udptable[], int *port_rover,
+		       	       	   int (*)(const struct sock*,const struct sock*));
+extern int	ipv4_rcv_saddr_equal(const struct sock *, const struct sock *);
+
+
+extern int	udp_setsockopt(struct sock *sk, int level, int optname,
+			       char __user *optval, int optlen);
+extern int	udp_getsockopt(struct sock *sk, int level, int optname,
+			       char __user *optval, int __user *optlen);
+
+#ifdef CONFIG_COMPAT
+extern int	compat_udp_setsockopt(struct sock *sk, int level, int optname,
+				      char __user *optval, int optlen);
+extern int	compat_udp_getsockopt(struct sock *sk, int level, int optname,
+				      char __user *optval, int __user *optlen);
+#endif
+extern int	udp_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
+			    size_t len, int noblock, int flags, int *addr_len);
+extern int	udp_sendpage(struct sock *sk, struct page *page, int offset,
+			     size_t size, int flags);
+extern int	udp_queue_rcv_skb(struct sock * sk, struct sk_buff *skb);
+extern int	udp_destroy_sock(struct sock *sk);
+
+#ifdef CONFIG_PROC_FS
+extern int	udp4_seq_show(struct seq_file *seq, void *v);
+#endif
+#endif	/* _UDP4_IMPL_H */