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jeremybenn |
/* $FreeBSD: src/sys/netinet6/pim6.h,v 1.2 2000/07/04 16:35:10 itojun Exp $ */
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/* $KAME: pim6.h,v 1.3 2000/03/25 07:23:58 sumikawa Exp $ */
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/*
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* Copyright (C) 1998 WIDE Project.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Protocol Independent Multicast (PIM) definitions
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*
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* Written by Ahmed Helmy, SGI, July 1996
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*
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* MULTICAST
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*/
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/*
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* PIM packet header
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*/
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#define PIM_VERSION 2
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struct pim {
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#if defined(BYTE_ORDER) && (BYTE_ORDER == LITTLE_ENDIAN)
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u_char pim_type:4, /* the PIM message type, currently they are:
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* Hello, Register, Register-Stop, Join/Prune,
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* Bootstrap, Assert, Graft (PIM-DM only),
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* Graft-Ack (PIM-DM only), C-RP-Adv
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*/
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pim_ver:4; /* PIM version number; 2 for PIMv2 */
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#else
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u_char pim_ver:4, /* PIM version */
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pim_type:4; /* PIM type */
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#endif
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u_char pim_rsv; /* Reserved */
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u_short pim_cksum; /* IP style check sum */
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};
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#define PIM_MINLEN 8 /* The header min. length is 8 */
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#define PIM6_REG_MINLEN (PIM_MINLEN+40) /* Register message + inner IP6 header */
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/*
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* Message types
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*/
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#define PIM_REGISTER 1 /* PIM Register type is 1 */
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/* second bit in reg_head is the null bit */
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#define PIM_NULL_REGISTER 0x40000000
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