Watt-32 tcp/ip  2.2 dev-rel.10
pim6.h
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1 
5 /* $FreeBSD: src/sys/netinet6/pim6.h,v 1.2 2000/07/04 16:35:10 itojun Exp $ */
6 /* $KAME: pim6.h,v 1.3 2000/03/25 07:23:58 sumikawa Exp $ */
7 
8 /*
9  * Copyright (C) 1998 WIDE Project.
10  * All rights reserved.
11  *
12  * Redistribution and use in source and binary forms, with or without
13  * modification, are permitted provided that the following conditions
14  * are met:
15  * 1. Redistributions of source code must retain the above copyright
16  * notice, this list of conditions and the following disclaimer.
17  * 2. Redistributions in binary form must reproduce the above copyright
18  * notice, this list of conditions and the following disclaimer in the
19  * documentation and/or other materials provided with the distribution.
20  * 3. Neither the name of the project nor the names of its contributors
21  * may be used to endorse or promote products derived from this software
22  * without specific prior written permission.
23  *
24  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27  * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34  * SUCH DAMAGE.
35  */
36 /*
37  * Protocol Independent Multicast (PIM) definitions
38  *
39  * Written by Ahmed Helmy, SGI, July 1996
40  *
41  * MULTICAST
42  */
43 
44 /*
45  * PIM packet header
46  */
47 #define PIM_VERSION 2
48 struct pim {
49 #if defined(BYTE_ORDER) && (BYTE_ORDER == LITTLE_ENDIAN)
50  u_char pim_type:4, /* the PIM message type, currently they are:
51  * Hello, Register, Register-Stop, Join/Prune,
52  * Bootstrap, Assert, Graft (PIM-DM only),
53  * Graft-Ack (PIM-DM only), C-RP-Adv
54  */
55  pim_ver:4; /* PIM version number; 2 for PIMv2 */
56 #else
57  u_char pim_ver:4, /* PIM version */
58  pim_type:4; /* PIM type */
59 #endif
60  u_char pim_rsv; /* Reserved */
61  u_short pim_cksum; /* IP style check sum */
62 };
63 
64 #define PIM_MINLEN 8 /* The header min. length is 8 */
65 #define PIM6_REG_MINLEN (PIM_MINLEN+40) /* Register message + inner IP6 header */
66 
67 /*
68  * Message types
69  */
70 #define PIM_REGISTER 1 /* PIM Register type is 1 */
71 
72 /* second bit in reg_head is the null bit */
73 #define PIM_NULL_REGISTER 0x40000000
Definition: pim6.h:48