sys/netinet/igmp_var.h

   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  *      from: @(#)igmp_var.h    8.1 (Berkeley) 7/19/93
  38  * $FreeBSD: src/sys/netinet/igmp_var.h,v 1.17 1999/12/29 04:40:59 peter Exp $
  39  * $DragonFly: src/sys/netinet/igmp_var.h,v 1.6 2006/09/03 20:52:29 dillon Exp $
  40  */
  41
  42 #ifndef _NETINET_IGMP_VAR_H_
  43 #define _NETINET_IGMP_VAR_H_
  44
  45 #ifndef _SYS_TYPES_H_
  46 #include <sys/types.h>
  47 #endif
  48
  49 #ifdef _KERNEL
  50
  51 #ifndef _SYS_SYSCTL_H_
  52 #include <sys/sysctl.h>
  53 #endif
  54
  55 #endif
  56
  57 /*
  58  * Internet Group Management Protocol (IGMP),
  59  * implementation-specific definitions.
  60  *
  61  * Written by Steve Deering, Stanford, May 1988.
  62  *
  63  * MULTICAST Revision: 3.5.1.3
  64  */
  65
  66 struct igmpstat {
  67         u_int   igps_rcv_total;         /* total IGMP messages received */
  68         u_int   igps_rcv_tooshort;      /* received with too few bytes */
  69         u_int   igps_rcv_badsum;        /* received with bad checksum */
  70         u_int   igps_rcv_queries;       /* received membership queries */
  71         u_int   igps_rcv_badqueries;    /* received invalid queries */
  72         u_int   igps_rcv_reports;       /* received membership reports */
  73         u_int   igps_rcv_badreports;    /* received invalid reports */
  74         u_int   igps_rcv_ourreports;    /* received reports for our groups */
  75         u_int   igps_snd_reports;       /* sent membership reports */
  76 };
  77
  78 #ifdef _KERNEL
  79 #define IGMP_RANDOM_DELAY(X) (krandom() % (X) + 1)
  80
  81 /*
  82  * States for IGMPv2's leave processing
  83  */
  84 #define IGMP_OTHERMEMBER                        0
  85 #define IGMP_IREPORTEDLAST                      1
  86
  87 /*
  88  * We must remember what version the subnet's querier is.
  89  * We conveniently use the IGMP message type for the proper
  90  * membership report to keep this state.
  91  */
  92 #define IGMP_V1_ROUTER                          IGMP_V1_MEMBERSHIP_REPORT
  93 #define IGMP_V2_ROUTER                          IGMP_V2_MEMBERSHIP_REPORT
  94
  95 /*
  96  * Revert to new router if we haven't heard from an old router in
  97  * this amount of time.
  98  */
  99 #define IGMP_AGE_THRESHOLD                      540
 100
 101 struct mbuf;
 102 struct in_multi;
 103
 104 void    igmp_init (void);
 105 void    igmp_input (struct mbuf *, ...);
 106 void    igmp_joingroup (struct in_multi *);
 107 void    igmp_leavegroup (struct in_multi *);
 108 void    igmp_fasttimo (void);
 109 void    igmp_slowtimo (void);
 110
 111 SYSCTL_DECL(_net_inet_igmp);
 112
 113 #endif
 114
 115 /*
 116  * Names for IGMP sysctl objects
 117  */
 118 #define IGMPCTL_STATS           1       /* statistics (read-only) */
 119 #define IGMPCTL_MAXID           2
 120
 121 #define IGMPCTL_NAMES { \
 122         { 0, 0 }, \
 123         { "stats", CTLTYPE_STRUCT }, \
 124 }
 125 #endif