sys/netinet/ip_ecn.h

   1 /*      $NetBSD: ip_ecn.h,v 1.11 2005/12/10 23:36:23 elad 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_ */