1 /* $FreeBSD: src/sys/netinet6/pim6.h,v 1.1.2.1 2000/07/15 07:14:36 kris Exp $ */ 2 /* $DragonFly: src/sys/netinet6/pim6.h,v 1.2 2003/06/17 04:28:53 dillon Exp $ */ 3 /* $KAME: pim6.h,v 1.3 2000/03/25 07:23:58 sumikawa Exp $ */ 4 5 /* 6 * Copyright (C) 1998 WIDE Project. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the project nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 /* 34 * Protocol Independent Multicast (PIM) definitions 35 * 36 * Written by Ahmed Helmy, SGI, July 1996 37 * 38 * MULTICAST 39 */ 40 41 /* 42 * PIM packet header 43 */ 44 #define PIM_VERSION 2 45 struct pim { 46 #if defined(BYTE_ORDER) && (BYTE_ORDER == LITTLE_ENDIAN) 47 u_char pim_type:4, /* the PIM message type, currently they are: 48 * Hello, Register, Register-Stop, Join/Prune, 49 * Bootstrap, Assert, Graft (PIM-DM only), 50 * Graft-Ack (PIM-DM only), C-RP-Adv 51 */ 52 pim_ver:4; /* PIM version number; 2 for PIMv2 */ 53 #else 54 u_char pim_ver:4, /* PIM version */ 55 pim_type:4; /* PIM type */ 56 #endif 57 u_char pim_rsv; /* Reserved */ 58 u_short pim_cksum; /* IP style check sum */ 59 }; 60 61 #define PIM_MINLEN 8 /* The header min. length is 8 */ 62 #define PIM6_REG_MINLEN (PIM_MINLEN+40) /* Register message + inner IP6 header */ 63 64 /* 65 * Message types 66 */ 67 #define PIM_REGISTER 1 /* PIM Register type is 1 */ 68 69 /* second bit in reg_head is the null bit */ 70 #define PIM_NULL_REGISTER 0x40000000 71