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. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  *      from: @(#)igmp_var.h    8.1 (Berkeley) 7/19/93
  34  * $FreeBSD: src/sys/netinet/igmp_var.h,v 1.17 1999/12/29 04:40:59 peter Exp $
  35  * $DragonFly: src/sys/netinet/igmp_var.h,v 1.6 2006/09/03 18:52:29 dillon Exp $
  36  */
  37
  38 #ifndef _NETINET_IGMP_VAR_H_
  39 #define _NETINET_IGMP_VAR_H_
  40
  41 #ifndef _SYS_TYPES_H_
  42 #include <sys/types.h>
  43 #endif
  44
  45 #ifdef _KERNEL
  46
  47 #ifndef _SYS_SYSCTL_H_
  48 #include <sys/sysctl.h>
  49 #endif
  50
  51 #endif
  52
  53 /*
  54  * Internet Group Management Protocol (IGMP),
  55  * implementation-specific definitions.
  56  *
  57  * Written by Steve Deering, Stanford, May 1988.
  58  *
  59  * MULTICAST Revision: 3.5.1.3
  60  */
  61
  62 struct igmpstat {
  63         u_int   igps_rcv_total;         /* total IGMP messages received */
  64         u_int   igps_rcv_tooshort;      /* received with too few bytes */
  65         u_int   igps_rcv_badsum;        /* received with bad checksum */
  66         u_int   igps_rcv_queries;       /* received membership queries */
  67         u_int   igps_rcv_badqueries;    /* received invalid queries */
  68         u_int   igps_rcv_reports;       /* received membership reports */
  69         u_int   igps_rcv_badreports;    /* received invalid reports */
  70         u_int   igps_rcv_ourreports;    /* received reports for our groups */
  71         u_int   igps_snd_reports;       /* sent membership reports */
  72 };
  73
  74 #ifdef _KERNEL
  75 #define IGMP_RANDOM_DELAY(X) (krandom() % (X) + 1)
  76
  77 /*
  78  * States for IGMPv2's leave processing
  79  */
  80 #define IGMP_OTHERMEMBER                        0
  81 #define IGMP_IREPORTEDLAST                      1
  82
  83 /*
  84  * We must remember what version the subnet's querier is.
  85  * We conveniently use the IGMP message type for the proper
  86  * membership report to keep this state.
  87  */
  88 #define IGMP_V1_ROUTER                          IGMP_V1_MEMBERSHIP_REPORT
  89 #define IGMP_V2_ROUTER                          IGMP_V2_MEMBERSHIP_REPORT
  90
  91 /*
  92  * Revert to new router if we haven't heard from an old router in
  93  * this amount of time.
  94  */
  95 #define IGMP_AGE_THRESHOLD                      540
  96
  97 struct mbuf;
  98 struct in_multi;
  99
 100 void    igmp_init (void);
 101 int     igmp_input (struct mbuf **, int *, int);
 102 void    igmp_joingroup (struct in_multi *);
 103 void    igmp_leavegroup (struct in_multi *);
 104 void    igmp_fasttimo (void);
 105 void    igmp_slowtimo (void);
 106
 107 SYSCTL_DECL(_net_inet_igmp);
 108
 109 #endif
 110
 111 /*
 112  * Names for IGMP sysctl objects
 113  */
 114 #define IGMPCTL_STATS           1       /* statistics (read-only) */
 115 #define IGMPCTL_MAXID           2
 116
 117 #define IGMPCTL_NAMES { \
 118         { 0, 0 }, \
 119         { "stats", CTLTYPE_STRUCT }, \
 120 }
 121 #endif