1/* $NetBSD: ip_ecn.h,v 1.12 2008/11/12 12:36:28 ad Exp $ */
2/* $KAME: ip_ecn.h,v 1.6 2001/05/03 14:51:48 itojun Exp $ */
3
4/*
5 * Copyright (C) 1999 WIDE Project.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the project nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 */
33/*
34 * ECN consideration on tunnel ingress/egress operation.
35 * http://www.aciri.org/floyd/papers/draft-ipsec-ecn-00.txt
36 */
37
38#ifndef _NETINET_IP_ECN_H_
39#define _NETINET_IP_ECN_H_
40
41#if (defined(__FreeBSD__) && __FreeBSD__ >= 3) || defined(__NetBSD__)
42#if defined(_KERNEL_OPT)
43#include "opt_inet.h"
44#endif
45#endif
46
47#define ECN_ALLOWED 1 /* ECN allowed */
48#define ECN_FORBIDDEN 0 /* ECN forbidden */
49#define ECN_NOCARE (-1) /* no consideration to ECN */
50
51#if defined(KERNEL) || defined(_KERNEL)
52extern void ip_ecn_ingress (int, u_int8_t *, const u_int8_t *);
53extern void ip_ecn_egress (int, const u_int8_t *, u_int8_t *);
54#ifdef INET6
55extern void ip6_ecn_ingress (int, u_int32_t *, const u_int32_t *);
56extern void ip6_ecn_egress (int, const u_int32_t *, u_int32_t *);
57#endif
58#endif
59#endif /* !_NETINET_IP_ECN_H_ */
60