The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/netinet/igmp_var.h

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    1 /*
    2  * Copyright (c) 1988 Stephen Deering.
    3  * Copyright (c) 1992, 1993
    4  *      The Regents of the University of California.  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  8.1 (Berkeley) 7/19/93
   38  * $FreeBSD: src/sys/netinet/igmp_var.h,v 1.9.4.1 1999/09/05 08:18:16 peter Exp $
   39  */
   40 
   41 #ifndef _NETINET_IGMP_VAR_H_
   42 #define _NETINET_IGMP_VAR_H_
   43 
   44 /*
   45  * Internet Group Management Protocol (IGMP),
   46  * implementation-specific definitions.
   47  *
   48  * Written by Steve Deering, Stanford, May 1988.
   49  *
   50  * MULTICAST Revision: 3.5.1.3
   51  */
   52 
   53 struct igmpstat {
   54         u_int   igps_rcv_total;         /* total IGMP messages received */
   55         u_int   igps_rcv_tooshort;      /* received with too few bytes */
   56         u_int   igps_rcv_badsum;        /* received with bad checksum */
   57         u_int   igps_rcv_queries;       /* received membership queries */
   58         u_int   igps_rcv_badqueries;    /* received invalid queries */
   59         u_int   igps_rcv_reports;       /* received membership reports */
   60         u_int   igps_rcv_badreports;    /* received invalid reports */
   61         u_int   igps_rcv_ourreports;    /* received reports for our groups */
   62         u_int   igps_snd_reports;       /* sent membership reports */
   63 };
   64 
   65 #ifdef KERNEL
   66 extern struct igmpstat igmpstat;
   67 
   68 #define IGMP_RANDOM_DELAY(X) (random() % (X) + 1)
   69 
   70 /*
   71  * States for IGMPv2's leave processing
   72  */
   73 #define IGMP_OTHERMEMBER                        0
   74 #define IGMP_IREPORTEDLAST                      1
   75 
   76 /*
   77  * We must remember what version the subnet's querier is.
   78  * We conveniently use the IGMP message type for the proper
   79  * membership report to keep this state.
   80  */
   81 #define IGMP_V1_ROUTER                          IGMP_V1_MEMBERSHIP_REPORT
   82 #define IGMP_V2_ROUTER                          IGMP_V2_MEMBERSHIP_REPORT
   83 
   84 /*
   85  * Revert to new router if we haven't heard from an old router in
   86  * this amount of time.
   87  */
   88 #define IGMP_AGE_THRESHOLD                      540
   89 
   90 void    igmp_init __P((void));
   91 void    igmp_input __P((struct mbuf *, int));
   92 void    igmp_joingroup __P((struct in_multi *));
   93 void    igmp_leavegroup __P((struct in_multi *));
   94 void    igmp_fasttimo __P((void));
   95 void    igmp_slowtimo __P((void));
   96 #endif
   97 
   98 /*
   99  * Names for IGMP sysctl objects
  100  */
  101 #define IGMPCTL_STATS           1       /* statistics (read-only) */
  102 #define IGMPCTL_MAXID           2
  103 
  104 #define IGMPCTL_NAMES { \
  105         { 0, 0 }, \
  106         { "stats", CTLTYPE_STRUCT }, \
  107 }
  108 
  109 #endif
  110 
  111 

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