pim6.h revision 1.3 1 1.3 thorpej /* $NetBSD: pim6.h,v 1.3 1999/07/03 21:30:19 thorpej Exp $ */
2 1.3 thorpej
3 1.2 itojun /*
4 1.2 itojun * Copyright (C) 1998 WIDE Project.
5 1.2 itojun * All rights reserved.
6 1.2 itojun *
7 1.2 itojun * Redistribution and use in source and binary forms, with or without
8 1.2 itojun * modification, are permitted provided that the following conditions
9 1.2 itojun * are met:
10 1.2 itojun * 1. Redistributions of source code must retain the above copyright
11 1.2 itojun * notice, this list of conditions and the following disclaimer.
12 1.2 itojun * 2. Redistributions in binary form must reproduce the above copyright
13 1.2 itojun * notice, this list of conditions and the following disclaimer in the
14 1.2 itojun * documentation and/or other materials provided with the distribution.
15 1.2 itojun * 3. Neither the name of the project nor the names of its contributors
16 1.2 itojun * may be used to endorse or promote products derived from this software
17 1.2 itojun * without specific prior written permission.
18 1.2 itojun *
19 1.2 itojun * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
20 1.2 itojun * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 1.2 itojun * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 1.2 itojun * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
23 1.2 itojun * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 1.2 itojun * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 1.2 itojun * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 1.2 itojun * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 1.2 itojun * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 1.2 itojun * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 1.2 itojun * SUCH DAMAGE.
30 1.2 itojun */
31 1.2 itojun /*
32 1.2 itojun * Protocol Independent Multicast (PIM) definitions
33 1.2 itojun *
34 1.2 itojun * Written by Ahmed Helmy, SGI, July 1996
35 1.2 itojun *
36 1.2 itojun * MULTICAST
37 1.2 itojun */
38 1.2 itojun
39 1.2 itojun /*
40 1.2 itojun * PIM packet header
41 1.2 itojun */
42 1.2 itojun #define PIM_VERSION 2
43 1.2 itojun struct pim {
44 1.2 itojun #if defined(BYTE_ORDER) && (BYTE_ORDER == LITTLE_ENDIAN)
45 1.2 itojun u_char pim_type:4, /* the PIM message type, currently they are:
46 1.2 itojun * Hello, Register, Register-Stop, Join/Prune,
47 1.2 itojun * Bootstrap, Assert, Graft (PIM-DM only),
48 1.2 itojun * Graft-Ack (PIM-DM only), C-RP-Adv
49 1.2 itojun */
50 1.2 itojun pim_ver:4; /* PIM version number; 2 for PIMv2 */
51 1.2 itojun #else
52 1.2 itojun u_char pim_ver:4, /* PIM version */
53 1.2 itojun pim_type:4; /* PIM type */
54 1.2 itojun #endif
55 1.2 itojun u_char pim_rsv; /* Reserved */
56 1.2 itojun u_short pim_cksum; /* IP style check sum */
57 1.2 itojun };
58 1.2 itojun
59 1.2 itojun #define PIM_MINLEN 8 /* The header min. length is 8 */
60 1.2 itojun #define PIM6_REG_MINLEN (PIM_MINLEN+40) /* Register message + inner IP6 header */
61 1.2 itojun
62 1.2 itojun /*
63 1.2 itojun * Message types
64 1.2 itojun */
65 1.2 itojun #define PIM_REGISTER 1 /* PIM Register type is 1 */
66 1.2 itojun
67 1.2 itojun /* second bit in reg_head is the null bit */
68 1.2 itojun #define PIM_NULL_REGISTER 0x40000000
69