| 1 | /*- |
| 2 | * SPDX-License-Identifier: BSD-3-Clause |
| 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 | * $KAME: pim6.h,v 1.3 2000/03/25 07:23:58 sumikawa Exp $ |
| 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 |