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pim6.h revision 1.3.2.1 
      1  1.3.2.1   bouyer /*	$NetBSD: pim6.h,v 1.3.2.1 2001/02/11 19:17:29 bouyer Exp $	*/
      2  1.3.2.1   bouyer /*	$KAME: pim6.h,v 1.3 2000/03/25 07:23:58 sumikawa Exp $	*/
      3      1.3  thorpej 
      4      1.2   itojun /*
      5      1.2   itojun  * Copyright (C) 1998 WIDE Project.
      6      1.2   itojun  * All rights reserved.
      7  1.3.2.1   bouyer  *
      8      1.2   itojun  * Redistribution and use in source and binary forms, with or without
      9      1.2   itojun  * modification, are permitted provided that the following conditions
     10      1.2   itojun  * are met:
     11      1.2   itojun  * 1. Redistributions of source code must retain the above copyright
     12      1.2   itojun  *    notice, this list of conditions and the following disclaimer.
     13      1.2   itojun  * 2. Redistributions in binary form must reproduce the above copyright
     14      1.2   itojun  *    notice, this list of conditions and the following disclaimer in the
     15      1.2   itojun  *    documentation and/or other materials provided with the distribution.
     16      1.2   itojun  * 3. Neither the name of the project nor the names of its contributors
     17      1.2   itojun  *    may be used to endorse or promote products derived from this software
     18      1.2   itojun  *    without specific prior written permission.
     19  1.3.2.1   bouyer  *
     20      1.2   itojun  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
     21      1.2   itojun  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     22      1.2   itojun  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     23      1.2   itojun  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
     24      1.2   itojun  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     25      1.2   itojun  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     26      1.2   itojun  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     27      1.2   itojun  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     28      1.2   itojun  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     29      1.2   itojun  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     30      1.2   itojun  * SUCH DAMAGE.
     31      1.2   itojun  */
     32      1.2   itojun /*
     33      1.2   itojun  * Protocol Independent Multicast (PIM) definitions
     34      1.2   itojun  *
     35      1.2   itojun  * Written by Ahmed Helmy, SGI, July 1996
     36      1.2   itojun  *
     37      1.2   itojun  * MULTICAST
     38      1.2   itojun  */
     39      1.2   itojun 
     40      1.2   itojun /*
     41      1.2   itojun  * PIM packet header
     42      1.2   itojun  */
     43      1.2   itojun #define PIM_VERSION	2
     44      1.2   itojun struct pim {
     45      1.2   itojun #if defined(BYTE_ORDER) && (BYTE_ORDER == LITTLE_ENDIAN)
     46      1.2   itojun 	u_char	pim_type:4, /* the PIM message type, currently they are:
     47      1.2   itojun 			     * Hello, Register, Register-Stop, Join/Prune,
     48      1.2   itojun 			     * Bootstrap, Assert, Graft (PIM-DM only),
     49      1.2   itojun 			     * Graft-Ack (PIM-DM only), C-RP-Adv
     50      1.2   itojun 			     */
     51      1.2   itojun 		pim_ver:4;  /* PIM version number; 2 for PIMv2 */
     52      1.2   itojun #else
     53      1.2   itojun 	u_char	pim_ver:4,	/* PIM version */
     54      1.2   itojun 		pim_type:4;	/* PIM type    */
     55      1.2   itojun #endif
     56      1.2   itojun 	u_char  pim_rsv;	/* Reserved */
     57      1.2   itojun 	u_short	pim_cksum;	/* IP style check sum */
     58      1.2   itojun };
     59      1.2   itojun 
     60      1.2   itojun #define PIM_MINLEN	8		/* The header min. length is 8    */
     61      1.2   itojun #define PIM6_REG_MINLEN	(PIM_MINLEN+40)	/* Register message + inner IP6 header */
     62      1.2   itojun 
     63  1.3.2.1   bouyer /*
     64      1.2   itojun  * Message types
     65      1.2   itojun  */
     66      1.2   itojun #define PIM_REGISTER	1	/* PIM Register type is 1 */
     67      1.2   itojun 
     68      1.2   itojun /* second bit in reg_head is the null bit */
     69      1.2   itojun #define PIM_NULL_REGISTER 0x40000000
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