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 * $FreeBSD$ 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 */ 54struct 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 */ 64struct 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 82struct 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 */ 94struct 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_ */ 149