/*	$NetBSD: mld6_var.h,v 1.5 2002/05/28 11:26:43 itojun Exp $	*/
/*	$KAME: mld6_var.h,v 1.4 2000/03/25 07:23:54 sumikawa Exp $	*/

/*
 * Copyright (C) 1998 WIDE Project.
 * All rights reserved.
 *
 * 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 project 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 PROJECT 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 PROJECT 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.
 */

#ifndef _NETINET6_MLD6_VAR_H_
#define _NETINET6_MLD6_VAR_H_

#include <netinet6/in6_msf.h>

#ifdef _KERNEL

extern	struct router6_info *rt6i_head;

#define MLD_RANDOM_DELAY(X)	(arc4random() % (X) + 1)
#define	MLD_TIMER_SCALE		1000

/*
 * We must remember what version the subnet's querier is.
 * We conveniently use the MLD message type for the proper membership
 * report to keep this state.
 */
#define	MLD_V1_ROUTER				MLD_LISTENER_REPORT
#define	MLD_V2_ROUTER				MLDV2_LISTENER_REPORT

/*
 * States for MLD stop-listening processing
 */
#define	MLD_OTHERLISTENER			0
#define	MLD_IREPORTEDLAST			1
#define	MLD_IDLELISTENER			2
#define	MLD_QUERY_PENDING_MEMBER		3
#define	MLD_G_QUERY_PENDING_MEMBER		4
#define	MLD_SG_QUERY_PENDING_MEMBER		5

/*
 * MLDv2 default variables
 */
#define	MLD_DEF_RV		2	/* Default Robustness Variable */
#define	MLD_DEF_QI		125	/* Query Interval (125 sec.) */
#define	MLD_DEF_QRI		10000	/* Query Response Interval (10 sec.) */
#define	MLD_OQPI ((MLD_DEF_RV * MLD_DEF_QI) + MLD_DEF_QRI/MLD_TIMER_SCALE/2)
				/* Other Querier Present Timer */
#define	MLD_MALI ((MLD_DEF_RV * MLD_DEF_QI) + MLD_DEF_QRI/MLD_TIMER_SCALE)
				/* Multicast Address Listener Interval */
#define	MLD_START_INTVL		MLD_DEF_QI/4
#define	MLD_START_CNT		MLD_DEF_RV
#define	MLD_LAST_INTVL		1000	/* Last Member Query Interval (1 sec) */
#define	MLD_LAST_CNT		MLD_DEF_RV
#define	MLD_UNSOL_INTVL		10	/* Unsolicited Report Interval (sec.) */
#define	MLDV2_UNSOL_INTVL	1	/* Unsolicited Report Interval (sec.) */
#define	MLD_DEF_QUERY		10	/* v1 Max. Response Time (sec.) */

struct	router6_info *rt6i_init(struct ifnet *);
void	mld_init(void);
void	mld_input(struct mbuf *, int);
#ifdef MLDV2
void	mld_sendbuf(struct mbuf *, struct ifnet *);
void	mld_start_listening(struct in6_multi *, u_int8_t);
void	mld_stop_listening(struct in6_multi *, u_int8_t);
#else
void	mld_start_listening(struct in6_multi *);
void	mld_stop_listening(struct in6_multi *);
#endif
void	mld_fasttimo(void);
void	mld_slowtimo(void);
void	mld_send_state_change_report
		(struct mbuf **, int *, struct in6_multi *, u_int8_t, int);
#endif /* _KERNEL */

#endif /* _NETINET6_MLD6_VAR_H_ */