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/* $OpenBSD: ip_ipip.h,v 1.2 2000/09/19 03:20:58 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).
*
* The original version of 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_IPIP_H_
#define _NETINET_IPIP_H_
/*
* IP-inside-IP processing.
* Not quite all the functionality of RFC-1853, but the main idea is there.
*/
struct ipipstat
{
u_int32_t ipips_ipackets; /* total input packets */
u_int32_t ipips_opackets; /* total output packets */
u_int32_t ipips_hdrops; /* packet shorter than header shows */
u_int32_t ipips_qfull;
u_int64_t ipips_ibytes;
u_int64_t ipips_obytes;
u_int32_t ipips_pdrops; /* packet dropped due to policy */
u_int32_t ipips_spoof; /* IP spoofing attempts */
u_int32_t ipips_family; /* Protocol family mismatch */
u_int32_t ipips_unspec; /* Missing tunnel endpoint address */
};
#define IP4_DEFAULT_TTL 0
#define IP4_SAME_TTL -1
/*
* Names for IPIP sysctl objects
*/
#define IPIPCTL_ALLOW 1 /* accept incoming IP4 packets */
#define IPIPCTL_MAXID 2
#define IPIPCTL_NAMES { \
{ 0, 0 }, \
{ "allow", CTLTYPE_INT }, \
}
#ifdef _KERNEL
int ipip_sysctl __P((int *, u_int, void *, size_t *, void *, size_t));
extern int ipip_allow;
extern struct ipipstat ipipstat;
#endif /* _KERNEL */
#endif /* _NETINET_IPIP_H_ */
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