/*      $NetBSD: pim6.h,v 1.5 2005/12/10 23:39:56 elad Exp $    */
/*      $KAME: pim6.h,v 1.3 2000/03/25 07:23:58 sumikawa Exp $  */

/*
* Copyright (C) 1998 WIDE Project.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. Neither the name of the project nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

#ifndef _NETINET6_PIM6_H_
#define _NETINET6_PIM6_H_

/*
* Protocol Independent Multicast (PIM) definitions
*
* Written by Ahmed Helmy, SGI, July 1996
*
* MULTICAST
*/

/*
* PIM packet header
*/
#define PIM_VERSION     2
struct pim {
#if defined(BYTE_ORDER) && (BYTE_ORDER == LITTLE_ENDIAN)
       u_char  pim_type:4, /* the PIM message type, currently they are:
                            * Hello, Register, Register-Stop, Join/Prune,
                            * Bootstrap, Assert, Graft (PIM-DM only),
                            * Graft-Ack (PIM-DM only), C-RP-Adv
                            */
               pim_ver:4;  /* PIM version number; 2 for PIMv2 */
#else
       u_char  pim_ver:4,      /* PIM version */
               pim_type:4;     /* PIM type    */
#endif
       u_char  pim_rsv;        /* Reserved */
       u_short pim_cksum;      /* IP style check sum */
};

#define PIM_MINLEN      8               /* The header min. length is 8    */
#define PIM6_REG_MINLEN (PIM_MINLEN+40) /* Register message + inner IP6 header */

/*
* Message types
*/
#define PIM_REGISTER    1       /* PIM Register type is 1 */

/* second bit in reg_head is the null bit */
#define PIM_NULL_REGISTER 0x40000000

#endif /* !_NETINET6_PIM6_H_ */