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  * 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  *      @(#)igmp.h      8.1 (Berkeley) 6/10/93
  38  * $FreeBSD: src/sys/netinet/igmp.h,v 1.10 1999/08/28 00:49:15 peter Exp $
  39  * $DragonFly: src/sys/netinet/igmp.h,v 1.4 2006/05/20 02:42:12 dillon Exp $
  40  */
  41
  42 #ifndef _NETINET_IGMP_H_
  43 #define _NETINET_IGMP_H_
  44
  45 #ifndef _SYS_TYPES_H_
  46 #include <sys/types.h>
  47 #endif
  48 #ifndef _NETINET_IN_H_
  49 #include <netinet/in.h>
  50 #endif
  51
  52 /*
  53  * Internet Group Management Protocol (IGMP) definitions.
  54  *
  55  * Written by Steve Deering, Stanford, May 1988.
  56  *
  57  * MULTICAST Revision: 3.5.1.2
  58  */
  59
  60 /*
  61  * IGMP packet format.
  62  */
  63 struct igmp {
  64         u_char          igmp_type;      /* version & type of IGMP message */
  65         u_char          igmp_code;      /* subtype for routing msgs */
  66         u_short         igmp_cksum;     /* IP-style checksum */
  67         struct in_addr  igmp_group;     /* group address being reported */
  68 };                                      /*  (zero for queries) */
  69
  70 #define IGMP_MINLEN                  8
  71
  72 /*
  73  * Message types, including version number.
  74  */
  75 #define IGMP_MEMBERSHIP_QUERY           0x11    /* membership query */
  76 #define IGMP_V1_MEMBERSHIP_REPORT       0x12    /* Ver. 1 membership report */
  77 #define IGMP_V2_MEMBERSHIP_REPORT       0x16    /* Ver. 2 membership report */
  78 #define IGMP_V2_LEAVE_GROUP             0x17    /* Leave-group message */
  79
  80 #define IGMP_DVMRP                      0x13    /* DVMRP routing message */
  81 #define IGMP_PIM                        0x14    /* PIM routing message */
  82
  83 #define IGMP_MTRACE_RESP                0x1e  /* traceroute resp.(to sender)*/
  84 #define IGMP_MTRACE                     0x1f  /* mcast traceroute messages */
  85
  86 #define IGMP_MAX_HOST_REPORT_DELAY   10    /* max delay for response to
  87                                             *  query (in seconds) according
  88                                             *  to RFC1112 */
  89
  90 #define IGMP_TIMER_SCALE     10         /* denotes that the igmp code field
  91                                          * specifies time in 10th of seconds*/
  92
  93 /*
  94  * The following four defininitions are for backwards compatibility.
  95  * They should be removed as soon as all applications are updated to
  96  * use the new constant names.
  97  */
  98 #define IGMP_HOST_MEMBERSHIP_QUERY      IGMP_MEMBERSHIP_QUERY
  99 #define IGMP_HOST_MEMBERSHIP_REPORT     IGMP_V1_MEMBERSHIP_REPORT
 100 #define IGMP_HOST_NEW_MEMBERSHIP_REPORT IGMP_V2_MEMBERSHIP_REPORT
 101 #define IGMP_HOST_LEAVE_MESSAGE         IGMP_V2_LEAVE_GROUP
 102
 103 #endif /* _NETINET_IGMP_H_ */