igmp.h revision 50477
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 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * @(#)igmp.h 8.1 (Berkeley) 6/10/93 38 * $FreeBSD: head/sys/netinet/igmp.h 50477 1999-08-28 01:08:13Z peter $ 39 */ 40 41#ifndef _NETINET_IGMP_H_ 42#define _NETINET_IGMP_H_ 43 44/* 45 * Internet Group Management Protocol (IGMP) definitions. 46 * 47 * Written by Steve Deering, Stanford, May 1988. 48 * 49 * MULTICAST Revision: 3.5.1.2 50 */ 51 52/* 53 * IGMP packet format. 54 */ 55struct 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#define IGMP_MINLEN 8 63 64/* 65 * Message types, including version number. 66 */ 67#define IGMP_MEMBERSHIP_QUERY 0x11 /* membership query */ 68#define IGMP_V1_MEMBERSHIP_REPORT 0x12 /* Ver. 1 membership report */ 69#define IGMP_V2_MEMBERSHIP_REPORT 0x16 /* Ver. 2 membership report */ 70#define IGMP_V2_LEAVE_GROUP 0x17 /* Leave-group message */ 71 72#define IGMP_DVMRP 0x13 /* DVMRP routing message */ 73#define IGMP_PIM 0x14 /* PIM routing message */ 74 75#define IGMP_MTRACE_RESP 0x1e /* traceroute resp.(to sender)*/ 76#define IGMP_MTRACE 0x1f /* mcast traceroute messages */ 77 78#define IGMP_MAX_HOST_REPORT_DELAY 10 /* max delay for response to */ 79 /* query (in seconds) according */ 80 /* to RFC1112 */ 81 82 83#define IGMP_TIMER_SCALE 10 /* denotes that the igmp code field */ 84 /* specifies time in 10th of seconds*/ 85 86/* 87 * The following four defininitions are for backwards compatibility. 88 * They should be removed as soon as all applications are updated to 89 * use the new constant names. 90 */ 91#define IGMP_HOST_MEMBERSHIP_QUERY IGMP_MEMBERSHIP_QUERY 92#define IGMP_HOST_MEMBERSHIP_REPORT IGMP_V1_MEMBERSHIP_REPORT 93#define IGMP_HOST_NEW_MEMBERSHIP_REPORT IGMP_V2_MEMBERSHIP_REPORT 94#define IGMP_HOST_LEAVE_MESSAGE IGMP_V2_LEAVE_GROUP 95 96#endif /* _NETINET_IGMP_H_ */ 97