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 /*      $OpenBSD: igmp_var.h,v 1.15 2022/03/28 16:31:26 bluhm Exp $     */
    2 /*      $NetBSD: igmp_var.h,v 1.9 1996/02/13 23:41:31 christos Exp $    */
    3 
    4 /*
    5  * Copyright (c) 1988 Stephen Deering.
    6  * Copyright (c) 1992, 1993
    7  *      The Regents of the University of California.  All rights reserved.
    8  *
    9  * This code is derived from software contributed to Berkeley by
   10  * Stephen Deering of Stanford University.
   11  *
   12  * Redistribution and use in source and binary forms, with or without
   13  * modification, are permitted provided that the following conditions
   14  * are met:
   15  * 1. Redistributions of source code must retain the above copyright
   16  *    notice, this list of conditions and the following disclaimer.
   17  * 2. Redistributions in binary form must reproduce the above copyright
   18  *    notice, this list of conditions and the following disclaimer in the
   19  *    documentation and/or other materials provided with the distribution.
   20  * 3. Neither the name of the University nor the names of its contributors
   21  *    may be used to endorse or promote products derived from this software
   22  *    without specific prior written permission.
   23  *
   24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   34  * SUCH DAMAGE.
   35  *
   36  *      @(#)igmp_var.h  8.1 (Berkeley) 7/19/93
   37  */
   38 
   39 #ifndef _NETINET_IGMP_VAR_H_
   40 #define _NETINET_IGMP_VAR_H_
   41 
   42 /*
   43  * Internet Group Management Protocol (IGMP),
   44  * implementation-specific definitions.
   45  *
   46  * Written by Steve Deering, Stanford, May 1988.
   47  * Modified by Rosen Sharma, Stanford, Aug 1994.
   48  * Modified by Bill Fenner, Xerox PARC, Feb 1995.
   49  *
   50  * MULTICAST 1.3
   51  */
   52 
   53 struct igmpstat {
   54         u_long  igps_rcv_total;         /* total IGMP messages received */
   55         u_long  igps_rcv_tooshort;      /* received with too few bytes */
   56         u_long  igps_rcv_badsum;        /* received with bad checksum */
   57         u_long  igps_rcv_queries;       /* received membership queries */
   58         u_long  igps_rcv_badqueries;    /* received invalid queries */
   59         u_long  igps_rcv_reports;       /* received membership reports */
   60         u_long  igps_rcv_badreports;    /* received invalid reports */
   61         u_long  igps_rcv_ourreports;    /* received reports for our groups */
   62         u_long  igps_snd_reports;       /* sent membership reports */
   63 };
   64 
   65 /*
   66  * Names for IGMP sysctl objects
   67  */
   68 #define IGMPCTL_STATS           1       /* IGMP statistics */
   69 #define IGMPCTL_MAXID           2
   70 
   71 #define IGMPCTL_NAMES { \
   72         { 0, 0 }, \
   73         { "stats",      CTLTYPE_STRUCT } \
   74 }
   75 
   76 #ifdef _KERNEL
   77 
   78 #include <sys/percpu.h>
   79 
   80 enum igmpstat_counters {
   81         igps_rcv_total,         /* total IGMP messages received */
   82         igps_rcv_tooshort,      /* received with too few bytes */
   83         igps_rcv_badsum,        /* received with bad checksum */
   84         igps_rcv_queries,       /* received membership queries */
   85         igps_rcv_badqueries,    /* received invalid queries */
   86         igps_rcv_reports,       /* received membership reports */
   87         igps_rcv_badreports,    /* received invalid reports */
   88         igps_rcv_ourreports,    /* received reports for our groups */
   89         igps_snd_reports,       /* sent membership reports */
   90         igps_ncounters
   91 };
   92 
   93 extern struct cpumem *igmpcounters;
   94 
   95 static inline void
   96 igmpstat_inc(enum igmpstat_counters c)
   97 {
   98         counters_inc(igmpcounters, c);
   99 }
  100 
  101 /*
  102  * Macro to compute a random timer value between 1 and (IGMP_MAX_REPORTING_
  103  * DELAY * countdown frequency).  We assume that the routine random()
  104  * is defined somewhere (and that it returns a positive number).
  105  */
  106 #define IGMP_RANDOM_DELAY(X)    (arc4random_uniform(X) + 1)
  107 
  108 void    igmp_init(void);
  109 int     igmp_input(struct mbuf **, int *, int, int);
  110 void    igmp_joingroup(struct in_multi *, struct ifnet *);
  111 void    igmp_leavegroup(struct in_multi *, struct ifnet *);
  112 void    igmp_fasttimo(void);
  113 void    igmp_slowtimo(void);
  114 int     igmp_sysctl(int *, u_int, void *, size_t *, void *, size_t);
  115 #endif /* _KERNEL */
  116 #endif /* _NETINET_IGMP_VAR_H_ */

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