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 */ 37 38 #ifndef _NETINET_IGMP_H_ 39 #define _NETINET_IGMP_H_ 40 41 /* 42 * Internet Group Management Protocol (IGMP) definitions. 43 * 44 * Written by Steve Deering, Stanford, May 1988. 45 * 46 * MULTICAST Revision: 3.5.1.2 47 */ 48 49 /* Minimum length of any IGMP protocol message. */ 50 #define IGMP_MINLEN 8 51 52 /* 53 * IGMPv1/v2 query and host report format. 54 */ 55 struct igmp { 56 u_char igmp_type; /* version & type of IGMP message */ 57 u_char igmp_code; /* subtype for routing msgs */ 58 u_short igmp_cksum; /* IP-style checksum */ 59 struct in_addr igmp_group; /* group address being reported */ 60 }; /* (zero for queries) */ 61 62 /* 63 * IGMP v3 query format. 64 */ 65 struct igmpv3 { 66 u_char igmp_type; /* version & type of IGMP message */ 67 u_char igmp_code; /* subtype for routing msgs */ 68 u_short igmp_cksum; /* IP-style checksum */ 69 struct in_addr igmp_group; /* group address being reported */ 70 /* (zero for queries) */ 71 u_char igmp_misc; /* reserved/suppress/robustness */ 72 u_char igmp_qqi; /* querier's query interval */ 73 u_short igmp_numsrc; /* number of sources */ 74 /*struct in_addr igmp_sources[1];*/ /* source addresses */ 75 }; 76 #define IGMP_V3_QUERY_MINLEN 12 77 #define IGMP_EXP(x) (((x) >> 4) & 0x07) 78 #define IGMP_MANT(x) ((x) & 0x0f) 79 #define IGMP_QRESV(x) (((x) >> 4) & 0x0f) 80 #define IGMP_SFLAG(x) (((x) >> 3) & 0x01) 81 #define IGMP_QRV(x) ((x) & 0x07) 82 83 struct igmp_grouprec { 84 u_char ig_type; /* record type */ 85 u_char ig_datalen; /* length of auxiliary data */ 86 u_short ig_numsrc; /* number of sources */ 87 struct in_addr ig_group; /* group address being reported */ 88 /*struct in_addr ig_sources[1];*/ /* source addresses */ 89 }; 90 #define IGMP_GRPREC_HDRLEN 8 91 92 /* 93 * IGMPv3 host membership report header. 94 */ 95 struct igmp_report { 96 u_char ir_type; /* IGMP_v3_HOST_MEMBERSHIP_REPORT */ 97 u_char ir_rsv1; /* must be zero */ 98 u_short ir_cksum; /* checksum */ 99 u_short ir_rsv2; /* must be zero */ 100 u_short ir_numgrps; /* number of group records */ 101 /*struct igmp_grouprec ir_groups[1];*/ /* group records */ 102 }; 103 #define IGMP_V3_REPORT_MINLEN 8 104 #define IGMP_V3_REPORT_MAXRECS 65535 105 106 /* 107 * Message types, including version number. 108 */ 109 #define IGMP_HOST_MEMBERSHIP_QUERY 0x11 /* membership query */ 110 #define IGMP_v1_HOST_MEMBERSHIP_REPORT 0x12 /* Ver. 1 membership report */ 111 #define IGMP_DVMRP 0x13 /* DVMRP routing message */ 112 #define IGMP_PIM 0x14 /* PIMv1 message (historic) */ 113 #define IGMP_v2_HOST_MEMBERSHIP_REPORT 0x16 /* Ver. 2 membership report */ 114 #define IGMP_HOST_LEAVE_MESSAGE 0x17 /* Leave-group message */ 115 #define IGMP_MTRACE_REPLY 0x1e /* mtrace(8) reply */ 116 #define IGMP_MTRACE_QUERY 0x1f /* mtrace(8) probe */ 117 #define IGMP_v3_HOST_MEMBERSHIP_REPORT 0x22 /* Ver. 3 membership report */ 118 119 /* 120 * IGMPv3 report modes. 121 */ 122 #define IGMP_DO_NOTHING 0 /* don't send a record */ 123 #define IGMP_MODE_IS_INCLUDE 1 /* MODE_IN */ 124 #define IGMP_MODE_IS_EXCLUDE 2 /* MODE_EX */ 125 #define IGMP_CHANGE_TO_INCLUDE_MODE 3 /* TO_IN */ 126 #define IGMP_CHANGE_TO_EXCLUDE_MODE 4 /* TO_EX */ 127 #define IGMP_ALLOW_NEW_SOURCES 5 /* ALLOW_NEW */ 128 #define IGMP_BLOCK_OLD_SOURCES 6 /* BLOCK_OLD */ 129 130 /* 131 * IGMPv3 query types. 132 */ 133 #define IGMP_V3_GENERAL_QUERY 1 134 #define IGMP_V3_GROUP_QUERY 2 135 #define IGMP_V3_GROUP_SOURCE_QUERY 3 136 137 /* 138 * Maximum report interval for IGMP v1/v2 host membership reports [RFC 1112] 139 */ 140 #define IGMP_V1V2_MAX_RI 10 141 #define IGMP_MAX_HOST_REPORT_DELAY IGMP_V1V2_MAX_RI 142 143 /* 144 * IGMP_TIMER_SCALE denotes that the igmp code field specifies 145 * time in tenths of a second. 146 */ 147 #define IGMP_TIMER_SCALE 10 148 149 #endif /* _NETINET_IGMP_H_ */ 150