ip_ecn.h revision 330897 
1/*	$FreeBSD: stable/11/sys/netinet/ip_ecn.h 330897 2018-03-14 03:19:51Z eadler $	*/
2/*	$KAME: ip_ecn.h,v 1.8 2002/01/07 11:34:47 kjc Exp $	*/
3
4/*-
5 * SPDX-License-Identifier: BSD-3-Clause
6 *
7 * Copyright (C) 1999 WIDE Project.
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the project nor the names of its contributors
19 *    may be used to endorse or promote products derived from this software
20 *    without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 */
35/*
36 * ECN consideration on tunnel ingress/egress operation.
37 * http://www.aciri.org/floyd/papers/draft-ipsec-ecn-00.txt
38 */
39
40#ifndef _NETINET_IP_ECN_H_
41#define _NETINET_IP_ECN_H_
42
43#define ECN_ALLOWED	1	/* ECN allowed */
44#define ECN_FORBIDDEN	0	/* ECN forbidden */
45#define ECN_NOCARE	(-1)	/* no consideration to ECN */
46
47#ifdef _KERNEL
48extern void ip_ecn_ingress(int, u_int8_t *, const u_int8_t *);
49extern int ip_ecn_egress(int, const u_int8_t *, u_int8_t *);
50#endif
51#endif
52