/*- * Copyright (c) 1988 Stephen Deering. * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Stephen Deering of Stanford University. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)igmp.h 8.1 (Berkeley) 6/10/93 * $FreeBSD$ */ #ifndef _NETINET_IGMP_H_ #define _NETINET_IGMP_H_ /* * Internet Group Management Protocol (IGMP) definitions. * * Written by Steve Deering, Stanford, May 1988. * * MULTICAST Revision: 3.5.1.2 */ /* * IGMP packet format. */ struct igmp { u_char igmp_type; /* version & type of IGMP message */ u_char igmp_code; /* subtype for routing msgs */ u_short igmp_cksum; /* IP-style checksum */ struct in_addr igmp_group; /* group address being reported */ }; /* (zero for queries) */ struct igmpv3 { u_char igmp_type; /* version & type of IGMP message */ u_char igmp_code; /* subtype for routing msgs */ u_short igmp_cksum; /* IP-style checksum */ struct in_addr igmp_group; /* group address being reported */ /* (zero for queries) */ u_char igmp_misc; /* reserved/suppress/robustness */ u_char igmp_qqi; /* querier's query interval */ u_short igmp_numsrc; /* number of sources */ /*struct in_addr igmp_sources[1];*/ /* source addresses */ }; struct igmp_grouprec { u_char ig_type; /* record type */ u_char ig_datalen; /* length of auxiliary data */ u_short ig_numsrc; /* number of sources */ struct in_addr ig_group; /* group address being reported */ /*struct in_addr ig_sources[1];*/ /* source addresses */ }; struct igmp_report { u_char ir_type; /* record type */ u_char ir_rsv1; /* reserved */ u_short ir_cksum; /* checksum */ u_short ir_rsv2; /* reserved */ u_short ir_numgrps; /* number of group records */ struct igmp_grouprec ir_groups[1]; /* group records */ }; #define IGMP_MINLEN 8 #define IGMP_HDRLEN 8 #define IGMP_GRPREC_HDRLEN 8 #define IGMP_PREPEND 0 #define IGMP_QRV(pigmp) ((pigmp)->igmp_misc & (0x07)) /* XXX */ #define IGMP_MAXSOURCES(len) (((len) - 12) >> 2) /* XXX */ /* * Message types, including version number. */ #define IGMP_MEMBERSHIP_QUERY 0x11 /* membership query */ #define IGMP_V1_MEMBERSHIP_REPORT 0x12 /* Ver. 1 membership report */ #define IGMP_V2_MEMBERSHIP_REPORT 0x16 /* Ver. 2 membership report */ #define IGMP_V2_LEAVE_GROUP 0x17 /* Leave-group message */ #define IGMP_DVMRP 0x13 /* DVMRP routing message */ #define IGMP_PIM 0x14 /* PIM routing message */ #define IGMP_MTRACE_RESP 0x1e /* traceroute resp.(to sender)*/ #define IGMP_MTRACE 0x1f /* mcast traceroute messages */ #define IGMP_V3_MEMBERSHIP_REPORT 0x22 /* Ver. 3 membership report */ #define IGMP_MAX_HOST_REPORT_DELAY 10 /* max delay for response to */ /* query (in seconds) according */ /* to RFC1112 */ #define IGMP_TIMER_SCALE 10 /* denotes that the igmp code field */ /* specifies time in 10th of seconds*/ /* * The following four defininitions are for backwards compatibility. * They should be removed as soon as all applications are updated to * use the new constant names. */ #define IGMP_HOST_MEMBERSHIP_QUERY IGMP_MEMBERSHIP_QUERY #define IGMP_HOST_MEMBERSHIP_REPORT IGMP_V1_MEMBERSHIP_REPORT #define IGMP_HOST_NEW_MEMBERSHIP_REPORT IGMP_V2_MEMBERSHIP_REPORT #define IGMP_HOST_LEAVE_MESSAGE IGMP_V2_LEAVE_GROUP #endif /* _NETINET_IGMP_H_ */