1/* $OpenBSD: igmp.h,v 1.6 2003/06/02 23:28:13 millert Exp $ */
2/* $NetBSD: igmp.h,v 1.6 1995/05/31 06:08:21 mycroft Exp $ */
3
4/*
5 * Copyright (c) 1988 Stephen Deering.
6 * Copyright (c) 1992, 1993
7 * The Regents of the University of California. All rights reserved.
8 *
9 * This code is derived from software contributed to Berkeley by
10 * Stephen Deering of Stanford University.
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 University 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 REGENTS 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 REGENTS 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 * @(#)igmp.h 8.1 (Berkeley) 6/10/93
37 */
38
39#ifndef _NETINET_IGMP_H_
40#define _NETINET_IGMP_H_
41
42/*
43 * Internet Group Management Protocol (IGMP) definitions.
44 *
45 * MULTICAST 1.3
46 */
47
48/*
49 * IGMP packet format.
50 */
51struct igmp {
52 u_int8_t igmp_type; /* version & type of IGMP message */
53 u_int8_t igmp_code; /* code for routing sub-messages */
54 u_int16_t 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#define IGMP_HOST_MEMBERSHIP_QUERY 0x11 /* membership query */
61#define IGMP_v1_HOST_MEMBERSHIP_REPORT 0x12 /* v1 membership report */
62#define IGMP_DVMRP 0x13 /* DVMRP routing message */
63#define IGMP_PIM 0x14 /* PIM routing message */
64#define IGMP_v2_HOST_MEMBERSHIP_REPORT 0x16 /* v2 membership report */
65#define IGMP_HOST_LEAVE_MESSAGE 0x17 /* leave-group message */
66#define IGMP_MTRACE_REPLY 0x1e /* traceroute reply */
67#define IGMP_MTRACE_QUERY 0x1f /* traceroute query */
68
69#define IGMP_MAX_HOST_REPORT_DELAY 10 /* max delay for response to */
70 /* query (in seconds) */
71
72#define IGMP_TIMER_SCALE 10 /* denominator for igmp_timer */
73
74/*
75 * States for the IGMP v2 state table.
76 */
77#define IGMP_DELAYING_MEMBER 1
78#define IGMP_IDLE_MEMBER 2
79#define IGMP_LAZY_MEMBER 3
80#define IGMP_SLEEPING_MEMBER 4
81#define IGMP_AWAKENING_MEMBER 5
82
83/*
84 * States for IGMP router version cache.
85 */
86#define IGMP_v1_ROUTER 1
87#define IGMP_v2_ROUTER 2
88
89/*
90 * Revert to v2 if we haven't heard from the router in this amount of time.
91 */
92#define IGMP_AGE_THRESHOLD 540
93
94#ifdef _KERNEL
95void rti_delete(struct ifnet *);
96#endif /* _KERNEL */
97#endif /* _NETINET_IGMP_H_ */