igmp.h revision 139823 
1/*-
2 * Copyright (c) 1988 Stephen Deering.
3 * Copyright (c) 1992, 1993
4 *	The Regents of the University of California.  All rights reserved.
5 *
6 * This code is derived from software contributed to Berkeley by
7 * Stephen Deering of Stanford University.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 *	@(#)igmp.h	8.1 (Berkeley) 6/10/93
34 * $FreeBSD: head/sys/netinet/igmp.h 139823 2005-01-07 01:45:51Z imp $
35 */
36
37#ifndef _NETINET_IGMP_H_
38#define _NETINET_IGMP_H_
39
40/*
41 * Internet Group Management Protocol (IGMP) definitions.
42 *
43 * Written by Steve Deering, Stanford, May 1988.
44 *
45 * MULTICAST Revision: 3.5.1.2
46 */
47
48/*
49 * IGMP packet format.
50 */
51struct igmp {
52	u_char		igmp_type;	/* version & type of IGMP message  */
53	u_char		igmp_code;	/* subtype for routing msgs        */
54	u_short		igmp_cksum;	/* IP-style checksum               */
55	struct in_addr	igmp_group;	/* group address being reported    */
56};					/*  (zero for queries)             */
57
58#define IGMP_MINLEN		     8
59
60/*
61 * Message types, including version number.
62 */
63#define IGMP_MEMBERSHIP_QUERY		0x11	/* membership query         */
64#define IGMP_V1_MEMBERSHIP_REPORT	0x12	/* Ver. 1 membership report */
65#define IGMP_V2_MEMBERSHIP_REPORT	0x16	/* Ver. 2 membership report */
66#define IGMP_V2_LEAVE_GROUP		0x17	/* Leave-group message	    */
67
68#define IGMP_DVMRP			0x13	/* DVMRP routing message    */
69#define IGMP_PIM			0x14	/* PIM routing message	    */
70
71#define IGMP_MTRACE_RESP		0x1e  /* traceroute resp.(to sender)*/
72#define IGMP_MTRACE			0x1f  /* mcast traceroute messages  */
73
74#define IGMP_MAX_HOST_REPORT_DELAY   10    /* max delay for response to     */
75					   /*  query (in seconds) according */
76					   /*  to RFC1112                   */
77
78
79#define IGMP_TIMER_SCALE     10		/* denotes that the igmp code field */
80					/* specifies time in 10th of seconds*/
81
82/*
83 * The following four defininitions are for backwards compatibility.
84 * They should be removed as soon as all applications are updated to
85 * use the new constant names.
86 */
87#define IGMP_HOST_MEMBERSHIP_QUERY	IGMP_MEMBERSHIP_QUERY
88#define IGMP_HOST_MEMBERSHIP_REPORT	IGMP_V1_MEMBERSHIP_REPORT
89#define IGMP_HOST_NEW_MEMBERSHIP_REPORT	IGMP_V2_MEMBERSHIP_REPORT
90#define IGMP_HOST_LEAVE_MESSAGE		IGMP_V2_LEAVE_GROUP
91
92#endif /* _NETINET_IGMP_H_ */
93