1/* $NetBSD: igmp.h,v 1.15 2021/02/03 18:13:13 roy Exp $ */
2
3/*
4 * Copyright (c) 1992, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Stephen Deering of Stanford University.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * @(#)igmp.h 8.1 (Berkeley) 6/10/93
35 */
36
37/*
38 * Copyright (c) 1988 Stephen Deering.
39 *
40 * This code is derived from software contributed to Berkeley by
41 * Stephen Deering of Stanford University.
42 *
43 * Redistribution and use in source and binary forms, with or without
44 * modification, are permitted provided that the following conditions
45 * are met:
46 * 1. Redistributions of source code must retain the above copyright
47 * notice, this list of conditions and the following disclaimer.
48 * 2. Redistributions in binary form must reproduce the above copyright
49 * notice, this list of conditions and the following disclaimer in the
50 * documentation and/or other materials provided with the distribution.
51 * 3. All advertising materials mentioning features or use of this software
52 * must display the following acknowledgement:
53 * This product includes software developed by the University of
54 * California, Berkeley and its contributors.
55 * 4. Neither the name of the University nor the names of its contributors
56 * may be used to endorse or promote products derived from this software
57 * without specific prior written permission.
58 *
59 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
60 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
61 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
62 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
63 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
64 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
65 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
69 * SUCH DAMAGE.
70 *
71 * @(#)igmp.h 8.1 (Berkeley) 6/10/93
72 */
73
74#ifndef _NETINET_IGMP_H_
75#define _NETINET_IGMP_H_
76
77/*
78 * Internet Group Management Protocol (IGMP) definitions.
79 *
80 * MULTICAST 1.3
81 */
82
83/*
84 * IGMP packet format.
85 */
86struct igmp {
87 uint8_t igmp_type; /* version & type of IGMP message */
88 uint8_t igmp_code; /* code for routing sub-messages */
89 uint16_t igmp_cksum; /* IP-style checksum */
90 struct in_addr igmp_group; /* group address being reported */
91}; /* (zero for queries) */
92#ifdef __CTASSERT
93__CTASSERT(sizeof(struct igmp) == 8);
94#endif
95
96#define IGMP_MINLEN 8
97
98#define IGMP_HOST_MEMBERSHIP_QUERY 0x11 /* membership query */
99#define IGMP_v1_HOST_MEMBERSHIP_REPORT 0x12 /* v1 membership report */
100#define IGMP_DVMRP 0x13 /* DVMRP routing message */
101#define IGMP_PIM 0x14 /* PIM routing message */
102#define IGMP_v2_HOST_MEMBERSHIP_REPORT 0x16 /* v2 membership report */
103#define IGMP_HOST_LEAVE_MESSAGE 0x17 /* leave-group message */
104#define IGMP_MTRACE_REPLY 0x1e /* traceroute reply */
105#define IGMP_MTRACE_QUERY 0x1f /* traceroute query */
106
107#define IGMP_MAX_HOST_REPORT_DELAY 10 /* max delay for response to */
108 /* query (in seconds) */
109
110#define IGMP_TIMER_SCALE 10 /* denominator for igmp_timer */
111
112/*
113 * States for the IGMP v2 state table.
114 */
115#define IGMP_DELAYING_MEMBER 1
116#define IGMP_IDLE_MEMBER 2
117#define IGMP_LAZY_MEMBER 3
118#define IGMP_SLEEPING_MEMBER 4
119#define IGMP_AWAKENING_MEMBER 5
120
121/*
122 * States for IGMP router version cache.
123 */
124#define IGMP_v1_ROUTER 1
125#define IGMP_v2_ROUTER 2
126
127/*
128 * Revert to v2 if we haven't heard from the router in this amount of time.
129 */
130#define IGMP_AGE_THRESHOLD 540
131
132#endif /* !_NETINET_IGMP_H_ */