1 /* $OpenBSD: ip_ecn.h,v 1.5 2002/05/16 14:10:51 kjc Exp $ */
2 /* $KAME: ip_ecn.h,v 1.5 2000/03/27 04:58:38 sumikawa 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 #ifndef _NETINET_IP_ECN_H_
35 #define _NETINET_IP_ECN_H_
36
37 /*
38 * ECN consideration on tunnel ingress/egress operation.
39 * http://www.aciri.org/floyd/papers/draft-ipsec-ecn-00.txt
40 */
41
42 #define ECN_ALLOWED 1 /* ECN allowed */
43 #define ECN_FORBIDDEN 0 /* ECN forbidden */
44 #define ECN_NOCARE (-1) /* no consideration to ECN */
45
46 #if defined(_KERNEL)
47 extern void ip_ecn_ingress(int, u_int8_t *, u_int8_t *);
48 extern int ip_ecn_egress(int, u_int8_t *, u_int8_t *);
49 #ifdef INET6
50 extern void ip6_ecn_ingress(int, u_int32_t *, u_int32_t *);
51 extern int ip6_ecn_egress(int, u_int32_t *, u_int32_t *);
52 #endif /* INET6 */
53 #endif /* _KERNEL */
54 #endif /* _NETINET_IP_ECN_H_ */