new file mode 100644
--- /dev/null
+++ b/packages/net/tcpip/current/include/netinet/ip_ip4.h
@@ -0,0 +1,136 @@
+//==========================================================================
+//
+//      include/netinet/ip_ip4.h
+//
+//      
+//
+//==========================================================================
+//####COPYRIGHTBEGIN####
+//                                                                          
+// -------------------------------------------                              
+// The contents of this file are subject to the Red Hat eCos Public License 
+// Version 1.1 (the "License"); you may not use this file except in         
+// compliance with the License.  You may obtain a copy of the License at    
+// http://www.redhat.com/                                                   
+//                                                                          
+// Software distributed under the License is distributed on an "AS IS"      
+// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See the 
+// License for the specific language governing rights and limitations under 
+// the License.                                                             
+//                                                                          
+// The Original Code is eCos - Embedded Configurable Operating System,      
+// released September 30, 1998.                                             
+//                                                                          
+// The Initial Developer of the Original Code is Red Hat.                   
+// Portions created by Red Hat are                                          
+// Copyright (C) 1998, 1999, 2000 Red Hat, Inc.                             
+// All Rights Reserved.                                                     
+// -------------------------------------------                              
+//                                                                          
+//####COPYRIGHTEND####
+//####BSDCOPYRIGHTBEGIN####
+//
+// -------------------------------------------
+//
+// Portions of this software may have been derived from OpenBSD or other sources,
+// and are covered by the appropriate copyright disclaimers included herein.
+//
+// -------------------------------------------
+//
+//####BSDCOPYRIGHTEND####
+//==========================================================================
+//#####DESCRIPTIONBEGIN####
+//
+// Author(s):    gthomas
+// Contributors: gthomas
+// Date:         2000-01-10
+// Purpose:      
+// Description:  
+//              
+//
+//####DESCRIPTIONEND####
+//
+//==========================================================================
+
+
+/*	$OpenBSD: ip_ip4.h,v 1.16 1999/12/09 09:02:59 angelos Exp $	*/
+
+/*
+ * The authors of this code are John Ioannidis (ji@tla.org),
+ * Angelos D. Keromytis (kermit@csd.uch.gr) and 
+ * Niels Provos (provos@physnet.uni-hamburg.de).
+ *
+ * This code was written by John Ioannidis for BSD/OS in Athens, Greece, 
+ * in November 1995.
+ *
+ * Ported to OpenBSD and NetBSD, with additional transforms, in December 1996,
+ * by Angelos D. Keromytis.
+ *
+ * Additional transforms and features in 1997 and 1998 by Angelos D. Keromytis
+ * and Niels Provos.
+ *
+ * Additional features in 1999 by Angelos D. Keromytis.
+ *
+ * Copyright (C) 1995, 1996, 1997, 1998, 1999 by John Ioannidis,
+ * Angelos D. Keromytis and Niels Provos.
+ *	
+ * Permission to use, copy, and modify this software without fee
+ * is hereby granted, provided that this entire notice is included in
+ * all copies of any software which is or includes a copy or
+ * modification of this software. 
+ * You may use this code under the GNU public license if you so wish. Please
+ * contribute changes back to the authors under this freer than GPL license
+ * so that we may further the use of strong encryption without limitations to
+ * all.
+ *
+ * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY
+ * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
+ * MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
+ * PURPOSE.
+ */
+
+#ifndef _NETINET_IP_IP4_H_
+#define _NETINET_IP_IP4_H_
+
+/*
+ * IP-inside-IP processing.
+ * Not quite all the functionality of RFC-1853, but the main idea is there.
+ */
+
+struct ip4stat
+{
+    u_int32_t	ip4s_ipackets;		/* total input packets */
+    u_int32_t	ip4s_opackets;		/* total output packets */
+    u_int32_t	ip4s_hdrops;		/* packet shorter than header shows */
+    u_int32_t	ip4s_qfull;
+    u_int64_t   ip4s_ibytes;
+    u_int64_t   ip4s_obytes;
+    u_int32_t	ip4s_pdrops;		/* packet dropped due to policy */
+    u_int32_t	ip4s_spoof;		/* IP spoofing attempts */
+    u_int32_t   ip4s_family;		/* Protocol family mismatch */
+    u_int32_t   ip4s_unspec;            /* Missing tunnel endpoint address */
+};
+
+#define IP4_DEFAULT_TTL    0
+#define IP4_SAME_TTL	  -1
+
+/*
+ * Names for IP4 sysctl objects
+ */
+#define	IP4CTL_ALLOW	1		/* accept incoming IP4 packets */
+#define IP4CTL_MAXID	2
+
+#define IP4CTL_NAMES { \
+	{ 0, 0 }, \
+	{ "allow", CTLTYPE_INT }, \
+}
+
+#ifdef _KERNEL
+int	ip4_sysctl __P((int *, u_int, void *, size_t *, void *, size_t));
+
+extern int ip4_allow;
+extern struct ip4stat ip4stat;
+#endif
+
+#endif // _NETINET_IP_IP4_H_