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

     /*
      * 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. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by the University of
     *      California, Berkeley and its contributors.
     * 4. 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: releng/5.0/sys/netinet/igmp_var.h 92723 2002-03-19 21:25:46Z alfred $
     */
    
    #ifndef _NETINET_IGMP_VAR_H_
    #define _NETINET_IGMP_VAR_H_
    
    /*
     * 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) (random() % (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
    
    void    igmp_init(void);
    void    igmp_input(struct mbuf *, int);
    void    igmp_joingroup(struct in_multi *);
    void    igmp_leavegroup(struct in_multi *);
    void    igmp_fasttimo(void);
    void    igmp_slowtimo(void);
    
    SYSCTL_DECL(_net_inet_igmp);
    
    #endif
    
    /*
    * Names for IGMP sysctl objects
    */
   #define IGMPCTL_STATS           1       /* statistics (read-only) */
   #define IGMPCTL_MAXID           2
   
   #define IGMPCTL_NAMES { \
           { 0, 0 }, \
           { "stats", CTLTYPE_STRUCT }, \
   }
   #endif

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