/*
 * 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. 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.
 *
 *      from: @(#)igmp_var.h    8.1 (Berkeley) 7/19/93
 * $FreeBSD: src/sys/netinet/igmp_var.h,v 1.17 1999/12/29 04:40:59 peter Exp $
 * $DragonFly: src/sys/netinet/igmp_var.h,v 1.6 2006/09/03 18:52:29 dillon Exp $
 */

#ifndef _NETINET_IGMP_VAR_H_
#define _NETINET_IGMP_VAR_H_

#ifndef _SYS_TYPES_H_
#include <sys/types.h>
#endif

#ifdef _KERNEL

#ifndef _SYS_SYSCTL_H_
#include <sys/sysctl.h>
#endif

#endif

/*
 * Internet Group Management Protocol (IGMP),
 * implementation-specific definitions.
 *
 * Written by Steve Deering, Stanford, May 1988.
 *
 * MULTICAST Revision: 3.5.1.3
 */

struct igmpstat {
        u_int   igps_rcv_total;         /* total IGMP messages received */
        u_int   igps_rcv_tooshort;      /* received with too few bytes */
        u_int   igps_rcv_badsum;        /* received with bad checksum */
        u_int   igps_rcv_queries;       /* received membership queries */
        u_int   igps_rcv_badqueries;    /* received invalid queries */
        u_int   igps_rcv_reports;       /* received membership reports */
        u_int   igps_rcv_badreports;    /* received invalid reports */
        u_int   igps_rcv_ourreports;    /* received reports for our groups */
        u_int   igps_snd_reports;       /* sent membership reports */
};

#ifdef _KERNEL
#define IGMP_RANDOM_DELAY(X) (krandom() % (X) + 1)

/*
 * States for IGMPv2's leave processing
 */
#define IGMP_OTHERMEMBER                        0
#define IGMP_IREPORTEDLAST                      1

/*
 * We must remember what version the subnet's querier is.
 * We conveniently use the IGMP message type for the proper
 * membership report to keep this state.
 */
#define IGMP_V1_ROUTER                          IGMP_V1_MEMBERSHIP_REPORT
#define IGMP_V2_ROUTER                          IGMP_V2_MEMBERSHIP_REPORT

/*
 * Revert to new router if we haven't heard from an old router in
 * this amount of time.
 */
#define IGMP_AGE_THRESHOLD                      540

struct mbuf;
struct in_multi;

void    igmp_init (void);
int     igmp_input (struct mbuf **, int *, int);
void    igmp_joingroup (struct in_multi *);
void    igmp_leavegroup (struct in_multi *);

SYSCTL_DECL(_net_inet_igmp);

#endif

/*
 * Names for IGMP sysctl objects
 */
#define IGMPCTL_STATS           1       /* statistics (read-only) */
#define IGMPCTL_MAXID           2

#endif