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

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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