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. 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: src/sys/netinet/igmp.h,v 1.10 1999/08/28 00:49:15 peter Exp $
  35  * $DragonFly: src/sys/netinet/igmp.h,v 1.4 2006/05/20 02:42:12 dillon Exp $
  36  */
  37
  38 #ifndef _NETINET_IGMP_H_
  39 #define _NETINET_IGMP_H_
  40
  41 #ifndef _SYS_TYPES_H_
  42 #include <sys/types.h>
  43 #endif
  44 #ifndef _NETINET_IN_H_
  45 #include <netinet/in.h>
  46 #endif
  47
  48 /*
  49  * Internet Group Management Protocol (IGMP) definitions.
  50  *
  51  * Written by Steve Deering, Stanford, May 1988.
  52  *
  53  * MULTICAST Revision: 3.5.1.2
  54  */
  55
  56 /*
  57  * IGMP packet format.
  58  */
  59 struct igmp {
  60         u_char          igmp_type;      /* version & type of IGMP message */
  61         u_char          igmp_code;      /* subtype for routing msgs */
  62         u_short         igmp_cksum;     /* IP-style checksum */
  63         struct in_addr  igmp_group;     /* group address being reported */
  64 };                                      /*  (zero for queries) */
  65
  66 #define IGMP_MINLEN                  8
  67
  68 /*
  69  * Message types, including version number.
  70  */
  71 #define IGMP_MEMBERSHIP_QUERY           0x11    /* membership query */
  72 #define IGMP_V1_MEMBERSHIP_REPORT       0x12    /* Ver. 1 membership report */
  73 #define IGMP_V2_MEMBERSHIP_REPORT       0x16    /* Ver. 2 membership report */
  74 #define IGMP_V2_LEAVE_GROUP             0x17    /* Leave-group message */
  75
  76 #define IGMP_DVMRP                      0x13    /* DVMRP routing message */
  77 #define IGMP_PIM                        0x14    /* PIM routing message */
  78
  79 #define IGMP_MTRACE_RESP                0x1e  /* traceroute resp.(to sender)*/
  80 #define IGMP_MTRACE                     0x1f  /* mcast traceroute messages */
  81
  82 #define IGMP_MAX_HOST_REPORT_DELAY   10    /* max delay for response to
  83                                             *  query (in seconds) according
  84                                             *  to RFC1112 */
  85
  86 #define IGMP_TIMER_SCALE     10         /* denotes that the igmp code field
  87                                          * specifies time in 10th of seconds*/
  88
  89 /*
  90  * The following four defininitions are for backwards compatibility.
  91  * They should be removed as soon as all applications are updated to
  92  * use the new constant names.
  93  */
  94 #define IGMP_HOST_MEMBERSHIP_QUERY      IGMP_MEMBERSHIP_QUERY
  95 #define IGMP_HOST_MEMBERSHIP_REPORT     IGMP_V1_MEMBERSHIP_REPORT
  96 #define IGMP_HOST_NEW_MEMBERSHIP_REPORT IGMP_V2_MEMBERSHIP_REPORT
  97 #define IGMP_HOST_LEAVE_MESSAGE         IGMP_V2_LEAVE_GROUP
  98
  99 #endif /* _NETINET_IGMP_H_ */