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/*
* 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.
*
* $FreeBSD$
*/
/*
* 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
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