sys/netinet/ip_ecn.h

   1 /*      $FreeBSD: src/sys/netinet/ip_ecn.h,v 1.2.2.2 2001/07/03 11:01:46 ume Exp $      */
   2 /*      $DragonFly: src/sys/netinet/ip_ecn.h,v 1.4 2006/05/20 02:42:12 dillon Exp $     */
   3 /*      $KAME: ip_ecn.h,v 1.6 2001/05/03 14:51:48 itojun Exp $  */
   4
   5 /*
   6  * Copyright (C) 1999 WIDE Project.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. Neither the name of the project nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  */
  34 /*
  35  * ECN consideration on tunnel ingress/egress operation.
  36  * http://www.aciri.org/floyd/papers/draft-ipsec-ecn-00.txt
  37  */
  38
  39 #ifndef _NETINET_IP_ECN_H_
  40 #define _NETINET_IP_ECN_H_
  41
  42 #ifndef _SYS_TYPES_H_
  43 #include <sys/types.h>
  44 #endif
  45
  46 #if defined(_KERNEL) && !defined(_LKM)
  47 #include "opt_inet.h"
  48 #endif
  49
  50 #define ECN_ALLOWED     1       /* ECN allowed */
  51 #define ECN_FORBIDDEN   0       /* ECN forbidden */
  52 #define ECN_NOCARE      (-1)    /* no consideration to ECN */
  53
  54 #ifdef _KERNEL
  55 extern void ip_ecn_ingress (int, u_int8_t *, const u_int8_t *);
  56 extern void ip_ecn_egress (int, const u_int8_t *, u_int8_t *);
  57 #endif
  58
  59 #endif