1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1988 Stephen Deering. 5 * Copyright (c) 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Stephen Deering of Stanford University. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)igmp.h 8.1 (Berkeley) 6/10/93 36 * $FreeBSD$ 37 */ 38 39 #ifndef _NETINET_IGMP_H_ 40 #define _NETINET_IGMP_H_ 41 42 /* 43 * Internet Group Management Protocol (IGMP) definitions. 44 * 45 * Written by Steve Deering, Stanford, May 1988. 46 * 47 * MULTICAST Revision: 3.5.1.2 48 */ 49 50 /* Minimum length of any IGMP protocol message. */ 51 #define IGMP_MINLEN 8 52 53 /* 54 * IGMPv1/v2 query and host report format. 55 */ 56 struct igmp { 57 u_char igmp_type; /* version & type of IGMP message */ 58 u_char igmp_code; /* subtype for routing msgs */ 59 u_short igmp_cksum; /* IP-style checksum */ 60 struct in_addr igmp_group; /* group address being reported */ 61 }; /* (zero for queries) */ 62 63 /* 64 * IGMP v3 query format. 65 */ 66 struct igmpv3 { 67 u_char igmp_type; /* version & type of IGMP message */ 68 u_char igmp_code; /* subtype for routing msgs */ 69 u_short igmp_cksum; /* IP-style checksum */ 70 struct in_addr igmp_group; /* group address being reported */ 71 /* (zero for queries) */ 72 u_char igmp_misc; /* reserved/suppress/robustness */ 73 u_char igmp_qqi; /* querier's query interval */ 74 u_short igmp_numsrc; /* number of sources */ 75 /*struct in_addr igmp_sources[1];*/ /* source addresses */ 76 }; 77 #define IGMP_V3_QUERY_MINLEN 12 78 #define IGMP_EXP(x) (((x) >> 4) & 0x07) 79 #define IGMP_MANT(x) ((x) & 0x0f) 80 #define IGMP_QRESV(x) (((x) >> 4) & 0x0f) 81 #define IGMP_SFLAG(x) (((x) >> 3) & 0x01) 82 #define IGMP_QRV(x) ((x) & 0x07) 83 84 struct igmp_grouprec { 85 u_char ig_type; /* record type */ 86 u_char ig_datalen; /* length of auxiliary data */ 87 u_short ig_numsrc; /* number of sources */ 88 struct in_addr ig_group; /* group address being reported */ 89 /*struct in_addr ig_sources[1];*/ /* source addresses */ 90 }; 91 #define IGMP_GRPREC_HDRLEN 8 92 93 /* 94 * IGMPv3 host membership report header. 95 */ 96 struct igmp_report { 97 u_char ir_type; /* IGMP_v3_HOST_MEMBERSHIP_REPORT */ 98 u_char ir_rsv1; /* must be zero */ 99 u_short ir_cksum; /* checksum */ 100 u_short ir_rsv2; /* must be zero */ 101 u_short ir_numgrps; /* number of group records */ 102 /*struct igmp_grouprec ir_groups[1];*/ /* group records */ 103 }; 104 #define IGMP_V3_REPORT_MINLEN 8 105 #define IGMP_V3_REPORT_MAXRECS 65535 106 107 /* 108 * Message types, including version number. 109 */ 110 #define IGMP_HOST_MEMBERSHIP_QUERY 0x11 /* membership query */ 111 #define IGMP_v1_HOST_MEMBERSHIP_REPORT 0x12 /* Ver. 1 membership report */ 112 #define IGMP_DVMRP 0x13 /* DVMRP routing message */ 113 #define IGMP_PIM 0x14 /* PIMv1 message (historic) */ 114 #define IGMP_v2_HOST_MEMBERSHIP_REPORT 0x16 /* Ver. 2 membership report */ 115 #define IGMP_HOST_LEAVE_MESSAGE 0x17 /* Leave-group message */ 116 #define IGMP_MTRACE_REPLY 0x1e /* mtrace(8) reply */ 117 #define IGMP_MTRACE_QUERY 0x1f /* mtrace(8) probe */ 118 #define IGMP_v3_HOST_MEMBERSHIP_REPORT 0x22 /* Ver. 3 membership report */ 119 120 /* 121 * IGMPv3 report modes. 122 */ 123 #define IGMP_DO_NOTHING 0 /* don't send a record */ 124 #define IGMP_MODE_IS_INCLUDE 1 /* MODE_IN */ 125 #define IGMP_MODE_IS_EXCLUDE 2 /* MODE_EX */ 126 #define IGMP_CHANGE_TO_INCLUDE_MODE 3 /* TO_IN */ 127 #define IGMP_CHANGE_TO_EXCLUDE_MODE 4 /* TO_EX */ 128 #define IGMP_ALLOW_NEW_SOURCES 5 /* ALLOW_NEW */ 129 #define IGMP_BLOCK_OLD_SOURCES 6 /* BLOCK_OLD */ 130 131 /* 132 * IGMPv3 query types. 133 */ 134 #define IGMP_V3_GENERAL_QUERY 1 135 #define IGMP_V3_GROUP_QUERY 2 136 #define IGMP_V3_GROUP_SOURCE_QUERY 3 137 138 /* 139 * Maximum report interval for IGMP v1/v2 host membership reports [RFC 1112] 140 */ 141 #define IGMP_V1V2_MAX_RI 10 142 #define IGMP_MAX_HOST_REPORT_DELAY IGMP_V1V2_MAX_RI 143 144 /* 145 * IGMP_TIMER_SCALE denotes that the igmp code field specifies 146 * time in tenths of a second. 147 */ 148 #define IGMP_TIMER_SCALE 10 149 150 #endif /* _NETINET_IGMP_H_ */ 151