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igmp_var.h revision 1.13 
      1 /*	$NetBSD: igmp_var.h,v 1.13 2002/05/29 01:33:45 itojun Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1988 Stephen Deering.
      5  * Copyright (c) 1992, 1993
      6  *	The Regents of the University of California.  All rights reserved.
      7  *
      8  * This code is derived from software contributed to Berkeley by
      9  * Stephen Deering of Stanford University.
     10  *
     11  * Redistribution and use in source and binary forms, with or without
     12  * modification, are permitted provided that the following conditions
     13  * are met:
     14  * 1. Redistributions of source code must retain the above copyright
     15  *    notice, this list of conditions and the following disclaimer.
     16  * 2. Redistributions in binary form must reproduce the above copyright
     17  *    notice, this list of conditions and the following disclaimer in the
     18  *    documentation and/or other materials provided with the distribution.
     19  * 3. All advertising materials mentioning features or use of this software
     20  *    must display the following acknowledgement:
     21  *	This product includes software developed by the University of
     22  *	California, Berkeley and its contributors.
     23  * 4. Neither the name of the University nor the names of its contributors
     24  *    may be used to endorse or promote products derived from this software
     25  *    without specific prior written permission.
     26  *
     27  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     28  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     29  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     30  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     31  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     35  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     36  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     37  * SUCH DAMAGE.
     38  *
     39  *	@(#)igmp_var.h	8.1 (Berkeley) 7/19/93
     40  */
     41 
     42 #ifndef _NETINET_IGMP_VAR_H_
     43 #define _NETINET_IGMP_VAR_H_
     44 
     45 /*
     46  * Internet Group Management Protocol (IGMP),
     47  * implementation-specific definitions.
     48  *
     49  * Written by Steve Deering, Stanford, May 1988.
     50  * Modified by Rosen Sharma, Stanford, Aug 1994.
     51  * Modified by Bill Fenner, Xerox PARC, Feb 1995.
     52  *
     53  * MULTICAST 1.3
     54  */
     55 
     56 struct igmpstat {
     57 	u_quad_t igps_rcv_total;	/* total IGMP messages received */
     58 	u_quad_t igps_rcv_tooshort;	/* received with too few bytes */
     59 	u_quad_t igps_rcv_badsum;	/* received with bad checksum */
     60 	u_quad_t igps_rcv_queries;	/* received membership queries */
     61 	u_quad_t igps_rcv_badqueries;	/* received invalid queries */
     62 	u_quad_t igps_rcv_reports;	/* received membership reports */
     63 	u_quad_t igps_rcv_badreports;	/* received invalid reports */
     64 	u_quad_t igps_rcv_ourreports;	/* received reports for our groups */
     65 	u_quad_t igps_snd_reports;	/* sent membership reports */
     66 };
     67 
     68 #ifdef _KERNEL
     69 extern	struct igmpstat igmpstat;
     70 
     71 /*
     72  * Macro to compute a random timer value between 1 and (IGMP_MAX_REPORTING_
     73  * DELAY * countdown frequency).  We assume that the routine random()
     74  * is defined somewhere (and that it returns a positive number).
     75  */
     76 #define	IGMP_RANDOM_DELAY(X)	(arc4random() % (X) + 1)
     77 
     78 void	igmp_init __P((void));
     79 void	igmp_input __P((struct mbuf *, ...));
     80 void	igmp_joingroup __P((struct in_multi *));
     81 void	igmp_leavegroup __P((struct in_multi *));
     82 void	igmp_fasttimo __P((void));
     83 void	igmp_slowtimo __P((void));
     84 #endif
     85 
     86 #endif /* _NETINET_IGMP_VAR_H_ */
     87