FreeBSD/Linux Kernel Cross Reference
sys/netinet6/pim6.h
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 * $FreeBSD: releng/12.0/sys/netinet6/pim6.h 326023 2017-11-20 19:43:44Z pfg $
33 */
34 /*
35 * Protocol Independent Multicast (PIM) definitions
36 *
37 * Written by Ahmed Helmy, SGI, July 1996
38 *
39 * MULTICAST
40 */
41
42 /*
43 * PIM packet header
44 */
45 #define PIM_VERSION 2
46 struct pim {
47 #if defined(BYTE_ORDER) && (BYTE_ORDER == LITTLE_ENDIAN)
48 u_char pim_type:4, /* the PIM message type, currently they are:
49 * Hello, Register, Register-Stop, Join/Prune,
50 * Bootstrap, Assert, Graft (PIM-DM only),
51 * Graft-Ack (PIM-DM only), C-RP-Adv
52 */
53 pim_ver:4; /* PIM version number; 2 for PIMv2 */
54 #else
55 u_char pim_ver:4, /* PIM version */
56 pim_type:4; /* PIM type */
57 #endif
58 u_char pim_rsv; /* Reserved */
59 u_short pim_cksum; /* IP style check sum */
60 };
61
62 #define PIM_MINLEN 8 /* The header min. length is 8 */
63 #define PIM6_REG_MINLEN (PIM_MINLEN+40) /* Register message + inner IP6 header */
64
65 /*
66 * Message types
67 */
68 #define PIM_REGISTER 1 /* PIM Register type is 1 */
69
70 /* second bit in reg_head is the null bit */
71 #define PIM_NULL_REGISTER 0x40000000
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