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      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)
     52 extern void ip_ecn_ingress (int, u_int8_t *, const u_int8_t *);
     53 extern void ip_ecn_egress (int, const u_int8_t *, u_int8_t *);
     54 #ifdef INET6
     55 extern void ip6_ecn_ingress (int, u_int32_t *, const u_int32_t *);
     56 extern void ip6_ecn_egress (int, const u_int32_t *, u_int32_t *);
     57 #endif
     58 #endif
     59 #endif /* !_NETINET_IP_ECN_H_ */
     60