FreeBSD/Linux Kernel Cross Reference
sys/netinet/igmp.h
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: src/sys/netinet/igmp.h,v 1.15 2007/06/15 18:59:10 bms Exp $
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 */
51 struct 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 struct igmpv3 {
59 u_char igmp_type; /* version & type of IGMP message */
60 u_char igmp_code; /* subtype for routing msgs */
61 u_short igmp_cksum; /* IP-style checksum */
62 struct in_addr igmp_group; /* group address being reported */
63 /* (zero for queries) */
64 u_char igmp_misc; /* reserved/suppress/robustness */
65 u_char igmp_qqi; /* querier's query interval */
66 u_short igmp_numsrc; /* number of sources */
67 /*struct in_addr igmp_sources[1];*/ /* source addresses */
68 };
69
70 struct igmp_grouprec {
71 u_char ig_type; /* record type */
72 u_char ig_datalen; /* length of auxiliary data */
73 u_short ig_numsrc; /* number of sources */
74 struct in_addr ig_group; /* group address being reported */
75 /*struct in_addr ig_sources[1];*/ /* source addresses */
76 };
77
78 struct igmp_report {
79 u_char ir_type; /* record type */
80 u_char ir_rsv1; /* reserved */
81 u_short ir_cksum; /* checksum */
82 u_short ir_rsv2; /* reserved */
83 u_short ir_numgrps; /* number of group records */
84 struct igmp_grouprec ir_groups[1]; /* group records */
85 };
86
87 #define IGMP_MINLEN 8
88 #define IGMP_HDRLEN 8
89 #define IGMP_GRPREC_HDRLEN 8
90 #define IGMP_PREPEND 0
91
92 #if 0
93 #define IGMP_QRV(pigmp) ((pigmp)->igmp_misc & (0x07)) /* XXX */
94 #define IGMP_MAXSOURCES(len) (((len) - 12) >> 2) /* XXX */
95 #endif
96
97 /*
98 * Message types, including version number.
99 */
100 #define IGMP_MEMBERSHIP_QUERY 0x11 /* membership query */
101 #define IGMP_V1_MEMBERSHIP_REPORT 0x12 /* Ver. 1 membership report */
102 #define IGMP_V2_MEMBERSHIP_REPORT 0x16 /* Ver. 2 membership report */
103 #define IGMP_V2_LEAVE_GROUP 0x17 /* Leave-group message */
104
105 #define IGMP_DVMRP 0x13 /* DVMRP routing message */
106 #define IGMP_PIM 0x14 /* PIM routing message */
107
108 #define IGMP_MTRACE_RESP 0x1e /* traceroute resp.(to sender)*/
109 #define IGMP_MTRACE 0x1f /* mcast traceroute messages */
110
111 #define IGMP_V3_MEMBERSHIP_REPORT 0x22 /* Ver. 3 membership report */
112
113 #define IGMP_MAX_HOST_REPORT_DELAY 10 /* max delay for response to */
114 /* query (in seconds) according */
115 /* to RFC1112 */
116
117
118 #define IGMP_TIMER_SCALE 10 /* denotes that the igmp code field */
119 /* specifies time in 10th of seconds*/
120
121 /*
122 * The following four defininitions are for backwards compatibility.
123 * They should be removed as soon as all applications are updated to
124 * use the new constant names.
125 */
126 #define IGMP_HOST_MEMBERSHIP_QUERY IGMP_MEMBERSHIP_QUERY
127 #define IGMP_HOST_MEMBERSHIP_REPORT IGMP_V1_MEMBERSHIP_REPORT
128 #define IGMP_HOST_NEW_MEMBERSHIP_REPORT IGMP_V2_MEMBERSHIP_REPORT
129 #define IGMP_HOST_LEAVE_MESSAGE IGMP_V2_LEAVE_GROUP
130
131 #endif /* _NETINET_IGMP_H_ */
132
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