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 /* 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