162587Sitojun/*	$FreeBSD$	*/
2121684Sume/*	$KAME: ip_ecn.h,v 1.8 2002/01/07 11:34:47 kjc Exp $	*/
362587Sitojun
4139823Simp/*-
555009Sshin * Copyright (C) 1999 WIDE Project.
655009Sshin * All rights reserved.
755009Sshin *
855009Sshin * Redistribution and use in source and binary forms, with or without
955009Sshin * modification, are permitted provided that the following conditions
1055009Sshin * are met:
1155009Sshin * 1. Redistributions of source code must retain the above copyright
1255009Sshin *    notice, this list of conditions and the following disclaimer.
1355009Sshin * 2. Redistributions in binary form must reproduce the above copyright
1455009Sshin *    notice, this list of conditions and the following disclaimer in the
1555009Sshin *    documentation and/or other materials provided with the distribution.
1655009Sshin * 3. Neither the name of the project nor the names of its contributors
1755009Sshin *    may be used to endorse or promote products derived from this software
1855009Sshin *    without specific prior written permission.
1955009Sshin *
2055009Sshin * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
2155009Sshin * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
2255009Sshin * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
2355009Sshin * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
2455009Sshin * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
2555009Sshin * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
2655009Sshin * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
2755009Sshin * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
2855009Sshin * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
2955009Sshin * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
3055009Sshin * SUCH DAMAGE.
3155009Sshin *
3255009Sshin */
3355009Sshin/*
3455009Sshin * ECN consideration on tunnel ingress/egress operation.
3555009Sshin * http://www.aciri.org/floyd/papers/draft-ipsec-ecn-00.txt
3655009Sshin */
3755009Sshin
38121684Sume#ifndef _NETINET_IP_ECN_H_
39121684Sume#define _NETINET_IP_ECN_H_
40121684Sume
4178064Sume#if defined(_KERNEL) && !defined(_LKM)
4278064Sume#include "opt_inet.h"
4378064Sume#endif
4478064Sume
4562587Sitojun#define ECN_ALLOWED	1	/* ECN allowed */
4662587Sitojun#define ECN_FORBIDDEN	0	/* ECN forbidden */
4762587Sitojun#define ECN_NOCARE	(-1)	/* no consideration to ECN */
4855009Sshin
4955205Speter#ifdef _KERNEL
5092723Salfredextern void ip_ecn_ingress(int, u_int8_t *, const u_int8_t *);
51121684Sumeextern int ip_ecn_egress(int, const u_int8_t *, u_int8_t *);
5255009Sshin#endif
53121684Sume#endif
54