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igmp_var.h revision 1.3 
      1 /*
      2  * Copyright (c) 1988 Stephen Deering.
      3  * Copyright (c) 1992 Regents of the University of California.
      4  * 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_var.h	7.1 (Berkeley) 7/8/92
     38  */
     39 
     40 /*
     41  * Internet Group Management Protocol (IGMP),
     42  * implementation-specific definitions.
     43  *
     44  * Written by Steve Deering, Stanford, May 1988.
     45  *
     46  * MULTICAST 1.1
     47  */
     48 
     49 struct igmpstat {
     50 	u_int	igps_rcv_total;		/* total IGMP messages received */
     51 	u_int	igps_rcv_tooshort;	/* received with too few bytes */
     52 	u_int	igps_rcv_badsum;	/* received with bad checksum */
     53 	u_int	igps_rcv_queries;	/* received membership queries */
     54 	u_int	igps_rcv_badqueries;	/* received invalid queries */
     55 	u_int	igps_rcv_reports;	/* received membership reports */
     56 	u_int	igps_rcv_badreports;	/* received invalid reports */
     57 	u_int	igps_rcv_ourreports;	/* received reports for our groups */
     58 	u_int	igps_snd_reports;	/* sent membership reports */
     59 };
     60 
     61 #ifdef KERNEL
     62 struct igmpstat igmpstat;
     63 
     64 /*
     65  * Macro to compute a random timer value between 1 and (IGMP_MAX_REPORTING_
     66  * DELAY * countdown frequency).  We assume that the routine random()
     67  * is defined somewhere (and that it returns a positive number).
     68  */
     69 #define	IGMP_RANDOM_DELAY(multiaddr)					\
     70 	/* struct in_addr multiaddr; */					\
     71 	(random() % (IGMP_MAX_HOST_REPORT_DELAY * PR_FASTHZ) + 1)
     72 
     73 void	igmp_init __P((void));
     74 void	igmp_input __P((struct mbuf *, int));
     75 void	igmp_joingroup __P((struct in_multi *));
     76 void	igmp_leavegroup __P((struct in_multi *));
     77 void	igmp_fasttimo __P((void));
     78 #endif
     79