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      1 /*	$NetBSD: ipip_var.h,v 1.6 2018/04/22 10:25:40 maxv Exp $	*/
      2 /*	$FreeBSD: ipip_var.h,v 1.1.4.1 2003/01/24 05:11:35 sam Exp $	*/
      3 /*	$OpenBSD: ip_ipip.h,v 1.5 2002/06/09 16:26:10 itojun Exp $ */
      4 /*
      5  * The authors of this code are John Ioannidis (ji (at) tla.org),
      6  * Angelos D. Keromytis (kermit (at) csd.uch.gr) and
      7  * Niels Provos (provos (at) physnet.uni-hamburg.de).
      8  *
      9  * The original version of this code was written by John Ioannidis
     10  * for BSD/OS in Athens, Greece, in November 1995.
     11  *
     12  * Ported to OpenBSD and NetBSD, with additional transforms, in December 1996,
     13  * by Angelos D. Keromytis.
     14  *
     15  * Additional transforms and features in 1997 and 1998 by Angelos D. Keromytis
     16  * and Niels Provos.
     17  *
     18  * Additional features in 1999 by Angelos D. Keromytis.
     19  *
     20  * Copyright (C) 1995, 1996, 1997, 1998, 1999 by John Ioannidis,
     21  * Angelos D. Keromytis and Niels Provos.
     22  * Copyright (c) 2001, Angelos D. Keromytis.
     23  *
     24  * Permission to use, copy, and modify this software with or without fee
     25  * is hereby granted, provided that this entire notice is included in
     26  * all copies of any software which is or includes a copy or
     27  * modification of this software.
     28  * You may use this code under the GNU public license if you so wish. Please
     29  * contribute changes back to the authors under this freer than GPL license
     30  * so that we may further the use of strong encryption without limitations to
     31  * all.
     32  *
     33  * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
     34  * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY
     35  * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
     36  * MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
     37  * PURPOSE.
     38  */
     39 
     40 #ifndef _NETINET_IPIP_H_
     41 #define _NETINET_IPIP_H_
     42 
     43 /*
     44  * IP-inside-IP processing.
     45  * Not quite all the functionality of RFC-1853, but the main idea is there.
     46  */
     47 
     48 #define	IPIP_STAT_IPACKETS	0	/* total input packets */
     49 #define	IPIP_STAT_OPACKETS	1	/* total output packets */
     50 #define	IPIP_STAT_HDROPS	2	/* packet shorter than header shows */
     51 #define	IPIP_STAT_QFULL		3
     52 #define	IPIP_STAT_IBYTES	4
     53 #define	IPIP_STAT_OBYTES	5
     54 #define	IPIP_STAT_PDROPS	6	/* packet dropped due to policy */
     55 #define	IPIP_STAT_SPOOF		7	/* IP spoofing attempts */
     56 #define	IPIP_STAT_FAMILY	8	/* protocol family mismatch */
     57 #define	IPIP_STAT_UNSPEC	9	/* missing tunnel endpoint address */
     58 
     59 #define	IPIP_NSTATS		10
     60 
     61 #ifdef _KERNEL
     62 extern	int ipip_spoofcheck;
     63 #endif /* _KERNEL */
     64 #endif /* !_NETINET_IPIP_H_ */
     65