sys/netinet/igmp.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  * 4. 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  *      @(#)igmp.h      8.1 (Berkeley) 6/10/93
  34  * $FreeBSD$
  35  */
  36
  37 #ifndef _NETINET_IGMP_H_
  38 #define _NETINET_IGMP_H_
  39
  40 /*
  41  * Internet Group Management Protocol (IGMP) definitions.
  42  *
  43  * Written by Steve Deering, Stanford, May 1988.
  44  *
  45  * MULTICAST Revision: 3.5.1.2
  46  */
  47
  48 /*
  49  * IGMP packet format.
  50  */
  51 struct igmp {
  52         u_char          igmp_type;      /* version & type of IGMP message  */
  53         u_char          igmp_code;      /* subtype for routing msgs        */
  54         u_short         igmp_cksum;     /* IP-style checksum               */
  55         struct in_addr  igmp_group;     /* group address being reported    */
  56 };                                      /*  (zero for queries)             */
  57
  58 struct igmpv3 {
  59         u_char          igmp_type;      /* version & type of IGMP message  */
  60         u_char          igmp_code;      /* subtype for routing msgs        */
  61         u_short         igmp_cksum;     /* IP-style checksum               */
  62         struct in_addr  igmp_group;     /* group address being reported    */
  63                                         /*  (zero for queries)             */
  64         u_char          igmp_misc;      /* reserved/suppress/robustness    */
  65         u_char          igmp_qqi;       /* querier's query interval        */
  66         u_short         igmp_numsrc;    /* number of sources               */
  67         /*struct in_addr        igmp_sources[1];*/ /* source addresses */
  68 };
  69
  70 struct igmp_grouprec {
  71         u_char          ig_type;        /* record type */
  72         u_char          ig_datalen;     /* length of auxiliary data */
  73         u_short         ig_numsrc;      /* number of sources */
  74         struct in_addr  ig_group;       /* group address being reported */
  75         /*struct in_addr        ig_sources[1];*/ /* source addresses */
  76 };
  77
  78 struct igmp_report {
  79         u_char          ir_type;        /* record type */
  80         u_char          ir_rsv1;        /* reserved */
  81         u_short         ir_cksum;       /* checksum */
  82         u_short         ir_rsv2;        /* reserved */
  83         u_short         ir_numgrps;     /* number of group records */
  84         struct          igmp_grouprec ir_groups[1];     /* group records */
  85 };
  86
  87 #define IGMP_MINLEN                     8
  88 #define IGMP_HDRLEN                     8
  89 #define IGMP_GRPREC_HDRLEN              8
  90 #define IGMP_PREPEND                    0
  91
  92 #if 0
  93 #define IGMP_QRV(pigmp)                 ((pigmp)->igmp_misc & (0x07)) /* XXX */
  94 #define IGMP_MAXSOURCES(len)            (((len) - 12) >> 2) /* XXX */
  95 #endif
  96
  97 /*
  98  * Message types, including version number.
  99  */
 100 #define IGMP_MEMBERSHIP_QUERY           0x11    /* membership query         */
 101 #define IGMP_V1_MEMBERSHIP_REPORT       0x12    /* Ver. 1 membership report */
 102 #define IGMP_V2_MEMBERSHIP_REPORT       0x16    /* Ver. 2 membership report */
 103 #define IGMP_V2_LEAVE_GROUP             0x17    /* Leave-group message      */
 104
 105 #define IGMP_DVMRP                      0x13    /* DVMRP routing message    */
 106 #define IGMP_PIM                        0x14    /* PIM routing message      */
 107
 108 #define IGMP_MTRACE_RESP                0x1e  /* traceroute resp.(to sender)*/
 109 #define IGMP_MTRACE                     0x1f  /* mcast traceroute messages  */
 110
 111 #define IGMP_V3_MEMBERSHIP_REPORT       0x22    /* Ver. 3 membership report */
 112
 113 #define IGMP_MAX_HOST_REPORT_DELAY   10    /* max delay for response to     */
 114                                            /*  query (in seconds) according */
 115                                            /*  to RFC1112                   */
 116
 117
 118 #define IGMP_TIMER_SCALE     10         /* denotes that the igmp code field */
 119                                         /* specifies time in 10th of seconds*/
 120
 121 /*
 122  * The following four defininitions are for backwards compatibility.
 123  * They should be removed as soon as all applications are updated to
 124  * use the new constant names.
 125  */
 126 #define IGMP_HOST_MEMBERSHIP_QUERY      IGMP_MEMBERSHIP_QUERY
 127 #define IGMP_HOST_MEMBERSHIP_REPORT     IGMP_V1_MEMBERSHIP_REPORT
 128 #define IGMP_HOST_NEW_MEMBERSHIP_REPORT IGMP_V2_MEMBERSHIP_REPORT
 129 #define IGMP_HOST_LEAVE_MESSAGE         IGMP_V2_LEAVE_GROUP
 130
 131 #endif /* _NETINET_IGMP_H_ */