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: releng/9.0/sys/netinet/igmp.h 193938 2009-06-10 18:12:15Z 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 /* Minimum length of any IGMP protocol message. */
49 #define IGMP_MINLEN 8
50
51 /*
52 * IGMPv1/v2 query and host report format.
53 */
54 struct igmp {
55 u_char igmp_type; /* version & type of IGMP message */
56 u_char igmp_code; /* subtype for routing msgs */
57 u_short igmp_cksum; /* IP-style checksum */
58 struct in_addr igmp_group; /* group address being reported */
59 }; /* (zero for queries) */
60
61 /*
62 * IGMP v3 query format.
63 */
64 struct igmpv3 {
65 u_char igmp_type; /* version & type of IGMP message */
66 u_char igmp_code; /* subtype for routing msgs */
67 u_short igmp_cksum; /* IP-style checksum */
68 struct in_addr igmp_group; /* group address being reported */
69 /* (zero for queries) */
70 u_char igmp_misc; /* reserved/suppress/robustness */
71 u_char igmp_qqi; /* querier's query interval */
72 u_short igmp_numsrc; /* number of sources */
73 /*struct in_addr igmp_sources[1];*/ /* source addresses */
74 };
75 #define IGMP_V3_QUERY_MINLEN 12
76 #define IGMP_EXP(x) (((x) >> 4) & 0x07)
77 #define IGMP_MANT(x) ((x) & 0x0f)
78 #define IGMP_QRESV(x) (((x) >> 4) & 0x0f)
79 #define IGMP_SFLAG(x) (((x) >> 3) & 0x01)
80 #define IGMP_QRV(x) ((x) & 0x07)
81
82 struct igmp_grouprec {
83 u_char ig_type; /* record type */
84 u_char ig_datalen; /* length of auxiliary data */
85 u_short ig_numsrc; /* number of sources */
86 struct in_addr ig_group; /* group address being reported */
87 /*struct in_addr ig_sources[1];*/ /* source addresses */
88 };
89 #define IGMP_GRPREC_HDRLEN 8
90
91 /*
92 * IGMPv3 host membership report header.
93 */
94 struct igmp_report {
95 u_char ir_type; /* IGMP_v3_HOST_MEMBERSHIP_REPORT */
96 u_char ir_rsv1; /* must be zero */
97 u_short ir_cksum; /* checksum */
98 u_short ir_rsv2; /* must be zero */
99 u_short ir_numgrps; /* number of group records */
100 /*struct igmp_grouprec ir_groups[1];*/ /* group records */
101 };
102 #define IGMP_V3_REPORT_MINLEN 8
103 #define IGMP_V3_REPORT_MAXRECS 65535
104
105 /*
106 * Message types, including version number.
107 */
108 #define IGMP_HOST_MEMBERSHIP_QUERY 0x11 /* membership query */
109 #define IGMP_v1_HOST_MEMBERSHIP_REPORT 0x12 /* Ver. 1 membership report */
110 #define IGMP_DVMRP 0x13 /* DVMRP routing message */
111 #define IGMP_PIM 0x14 /* PIMv1 message (historic) */
112 #define IGMP_v2_HOST_MEMBERSHIP_REPORT 0x16 /* Ver. 2 membership report */
113 #define IGMP_HOST_LEAVE_MESSAGE 0x17 /* Leave-group message */
114 #define IGMP_MTRACE_REPLY 0x1e /* mtrace(8) reply */
115 #define IGMP_MTRACE_QUERY 0x1f /* mtrace(8) probe */
116 #define IGMP_v3_HOST_MEMBERSHIP_REPORT 0x22 /* Ver. 3 membership report */
117
118 /*
119 * IGMPv3 report modes.
120 */
121 #define IGMP_DO_NOTHING 0 /* don't send a record */
122 #define IGMP_MODE_IS_INCLUDE 1 /* MODE_IN */
123 #define IGMP_MODE_IS_EXCLUDE 2 /* MODE_EX */
124 #define IGMP_CHANGE_TO_INCLUDE_MODE 3 /* TO_IN */
125 #define IGMP_CHANGE_TO_EXCLUDE_MODE 4 /* TO_EX */
126 #define IGMP_ALLOW_NEW_SOURCES 5 /* ALLOW_NEW */
127 #define IGMP_BLOCK_OLD_SOURCES 6 /* BLOCK_OLD */
128
129 /*
130 * IGMPv3 query types.
131 */
132 #define IGMP_V3_GENERAL_QUERY 1
133 #define IGMP_V3_GROUP_QUERY 2
134 #define IGMP_V3_GROUP_SOURCE_QUERY 3
135
136 /*
137 * Maximum report interval for IGMP v1/v2 host membership reports [RFC 1112]
138 */
139 #define IGMP_V1V2_MAX_RI 10
140 #define IGMP_MAX_HOST_REPORT_DELAY IGMP_V1V2_MAX_RI
141
142 /*
143 * IGMP_TIMER_SCALE denotes that the igmp code field specifies
144 * time in tenths of a second.
145 */
146 #define IGMP_TIMER_SCALE 10
147
148 #endif /* _NETINET_IGMP_H_ */
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