Home | History | Annotate | Line # | Download | only in netinet6
pim6.h revision 1.3 
      1 /*	$NetBSD: pim6.h,v 1.3 1999/07/03 21:30:19 thorpej Exp $	*/
      2 
      3 /*
      4  * Copyright (C) 1998 WIDE Project.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. Neither the name of the project nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  */
     31 /*
     32  * Protocol Independent Multicast (PIM) definitions
     33  *
     34  * Written by Ahmed Helmy, SGI, July 1996
     35  *
     36  * MULTICAST
     37  */
     38 
     39 /*
     40  * PIM packet header
     41  */
     42 #define PIM_VERSION	2
     43 struct pim {
     44 #if defined(BYTE_ORDER) && (BYTE_ORDER == LITTLE_ENDIAN)
     45 	u_char	pim_type:4, /* the PIM message type, currently they are:
     46 			     * Hello, Register, Register-Stop, Join/Prune,
     47 			     * Bootstrap, Assert, Graft (PIM-DM only),
     48 			     * Graft-Ack (PIM-DM only), C-RP-Adv
     49 			     */
     50 		pim_ver:4;  /* PIM version number; 2 for PIMv2 */
     51 #else
     52 	u_char	pim_ver:4,	/* PIM version */
     53 		pim_type:4;	/* PIM type    */
     54 #endif
     55 	u_char  pim_rsv;	/* Reserved */
     56 	u_short	pim_cksum;	/* IP style check sum */
     57 };
     58 
     59 #define PIM_MINLEN	8		/* The header min. length is 8    */
     60 #define PIM6_REG_MINLEN	(PIM_MINLEN+40)	/* Register message + inner IP6 header */
     61 
     62 /*
     63  * Message types
     64  */
     65 #define PIM_REGISTER	1	/* PIM Register type is 1 */
     66 
     67 /* second bit in reg_head is the null bit */
     68 #define PIM_NULL_REGISTER 0x40000000
     69