1/* Copyright (C) 1997-2025 Free Software Foundation, Inc.
  2   This file is part of the GNU C Library.
  3
  4   The GNU C Library is free software; you can redistribute it and/or
  5   modify it under the terms of the GNU Lesser General Public
  6   License as published by the Free Software Foundation; either
  7   version 2.1 of the License, or (at your option) any later version.
  8
  9   The GNU C Library is distributed in the hope that it will be useful,
 10   but WITHOUT ANY WARRANTY; without even the implied warranty of
 11   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 12   Lesser General Public License for more details.
 13
 14   You should have received a copy of the GNU Lesser General Public
 15   License along with the GNU C Library; if not, see
 16   <https://www.gnu.org/licenses/>.  */
 17
 18#ifndef _NETINET_IGMP_H
 19#define	_NETINET_IGMP_H 1
 20
 21#include <sys/cdefs.h>
 22#include <sys/types.h>
 23
 24#ifdef __USE_MISC
 25
 26#include <netinet/in.h>
 27
 28__BEGIN_DECLS
 29
 30/*
 31 * Copyright (c) 1988 Stephen Deering.
 32 * Copyright (c) 1992, 1993
 33 *	The Regents of the University of California.  All rights reserved.
 34 *
 35 * This code is derived from software contributed to Berkeley by
 36 * Stephen Deering of Stanford University.
 37 *
 38 * Redistribution and use in source and binary forms, with or without
 39 * modification, are permitted provided that the following conditions
 40 * are met:
 41 * 1. Redistributions of source code must retain the above copyright
 42 *    notice, this list of conditions and the following disclaimer.
 43 * 2. Redistributions in binary form must reproduce the above copyright
 44 *    notice, this list of conditions and the following disclaimer in the
 45 *    documentation and/or other materials provided with the distribution.
 46 * 4. Neither the name of the University nor the names of its contributors
 47 *    may be used to endorse or promote products derived from this software
 48 *    without specific prior written permission.
 49 *
 50 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 51 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 52 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 53 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 54 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 55 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 56 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 57 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 58 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 59 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 60 * SUCH DAMAGE.
 61 *
 62 *	@(#)igmp.h	8.1 (Berkeley) 6/10/93
 63 *	$FreeBSD$
 64 */
 65
 66struct igmp {
 67  uint8_t igmp_type;             /* IGMP type */
 68  uint8_t igmp_code;             /* routing code */
 69  uint16_t igmp_cksum;           /* checksum */
 70  struct in_addr igmp_group;     /* group address */
 71};
 72
 73#define IGMP_MINLEN			8
 74
 75/*
 76 * Message types, including version number.
 77 */
 78#define IGMP_MEMBERSHIP_QUERY   	0x11	/* membership query         */
 79#define IGMP_V1_MEMBERSHIP_REPORT	0x12	/* Ver. 1 membership report */
 80#define IGMP_V2_MEMBERSHIP_REPORT	0x16	/* Ver. 2 membership report */
 81#define IGMP_V2_LEAVE_GROUP		0x17	/* Leave-group message	    */
 82
 83#define IGMP_DVMRP			0x13	/* DVMRP routing message    */
 84#define IGMP_PIM			0x14	/* PIM routing message      */
 85#define IGMP_TRACE			0x15
 86
 87#define IGMP_MTRACE_RESP		0x1e	/* traceroute resp.(to sender)*/
 88#define IGMP_MTRACE			0x1f	/* mcast traceroute messages  */
 89#define IGMP_MRDISC_ADV			0x30	/* From RFC4286.  */
 90
 91#define IGMP_MAX_HOST_REPORT_DELAY	10	/* max delay for response to     */
 92						/*  query (in seconds) according */
 93						/*  to RFC1112                   */
 94#define IGMP_TIMER_SCALE		10	/* denotes that the igmp code field */
 95						/* specifies time in 10th of seconds*/
 96
 97/*
 98 * States for the IGMP v2 state table.
 99 */
100#define IGMP_DELAYING_MEMBER	1
101#define IGMP_IDLE_MEMBER	2
102#define IGMP_LAZY_MEMBER	3
103#define IGMP_SLEEPING_MEMBER	4
104#define IGMP_AWAKENING_MEMBER	5
105
106/*
107 * States for IGMP router version cache.
108 */
109#define IGMP_v1_ROUTER		1
110#define IGMP_v2_ROUTER		2
111
112/*
113 * The following four definitions are for backwards compatibility.
114 * They should be removed as soon as all applications are updated to
115 * use the new constant names.
116 */
117#define IGMP_HOST_MEMBERSHIP_QUERY	IGMP_MEMBERSHIP_QUERY
118#define IGMP_HOST_MEMBERSHIP_REPORT	IGMP_V1_MEMBERSHIP_REPORT
119#define IGMP_HOST_NEW_MEMBERSHIP_REPORT	IGMP_V2_MEMBERSHIP_REPORT
120#define IGMP_HOST_LEAVE_MESSAGE		IGMP_V2_LEAVE_GROUP
121
122__END_DECLS
123
124#endif
125
126#endif	/* netinet/igmp.h */