/* * 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 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 * $Id: igmp.h,v 1.4 1994/09/06 22:42:17 wollman Exp $ */ #ifndef _NETINET_IGMP_H_ #define _NETINET_IGMP_H_ /* * Internet Group Management Protocol (IGMP) definitions. * * Written by Steve Deering, Stanford, May 1988. * * MULTICAST Revision: 3.3.1.2 */ /* * 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) */ #define IGMP_MINLEN 8 /* * Message types, including version number. */ #define IGMP_HOST_MEMBERSHIP_QUERY 0x11 /* Host membership query */ #define IGMP_HOST_MEMBERSHIP_REPORT 0x12 /* Old membership report */ #define IGMP_DVMRP 0x13 /* DVMRP routing message */ #define IGMP_PIM 0x14 /* PIM routing message */ #define IGMP_HOST_NEW_MEMBERSHIP_REPORT 0x16 /* New membership report */ #define IGMP_HOST_LEAVE_MESSAGE 0x17 /* Leave-group message */ #define IGMP_MTRACE_RESP 0x1e /* traceroute resp. (to sender) */ #define IGMP_MTRACE 0x1f /* mcast traceroute messages */ #define IGMP_MAX_HOST_REPORT_DELAY 10 /* max delay for response to */ /* query (in seconds) */ #define IGMP_TIMER_SCALE 10 /* denotes that the igmp->timer filed */ /*specifies time in tenths of seconds */ /* * States for the IGMPv2 state table */ #define IGMP_DELAYING_MEMBER 1 #define IGMP_IDLE_MEMBER 2 #define IGMP_LAZY_MEMBER 3 #define IGMP_SLEEPING_MEMBER 4 #define IGMP_AWAKENING_MEMBER 5 /* * We must remember whether the querier is an old or a new router. */ #define IGMP_OLD_ROUTER 0 #define IGMP_NEW_ROUTER 1 /* * Revert to new router if we haven't heard from an old router in * this amount of time. */ #define IGMP_AGE_THRESHOLD 540 #endif /* _NETINET_IGMP_H_ */