ip_ecn.h revision 55205 
1/*
2 * Copyright (C) 1999 WIDE Project.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the project nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $Id: ip_ecn.h,v 1.2 1999/08/19 12:57:44 itojun Exp $
30 * $FreeBSD: head/sys/netinet/ip_ecn.h 55205 1999-12-29 04:46:21Z peter $
31 */
32/*
33 * ECN consideration on tunnel ingress/egress operation.
34 * http://www.aciri.org/floyd/papers/draft-ipsec-ecn-00.txt
35 */
36
37#define	ECN_ALLOWED	1	/* ECN allowed */
38#define	ECN_FORBIDDEN	0	/* ECN forbidden */
39#define	ECN_NOCARE	(-1)	/* no consideration to ECN */
40
41#ifdef _KERNEL
42extern void ip_ecn_ingress __P((int, u_int8_t *, u_int8_t *));
43extern void ip_ecn_egress __P((int, u_int8_t *, u_int8_t *));
44#endif
45