projects / apple / xnu.git / blame
| Commit | Line | Data |
|---|---|---|
| 1c79356b A |
1 | /* $KAME: pim6.h,v 1.2 2000/02/22 14:04:33 itojun 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 |