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FreeBSD/Linux Kernel Cross Reference
sys/netinet/igmp.h

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    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: src/sys/netinet/igmp.h,v 1.13 2005/01/07 01:45:44 imp Exp $
   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 #define IGMP_MINLEN                  8
   59 
   60 /*
   61  * Message types, including version number.
   62  */
   63 #define IGMP_MEMBERSHIP_QUERY           0x11    /* membership query         */
   64 #define IGMP_V1_MEMBERSHIP_REPORT       0x12    /* Ver. 1 membership report */
   65 #define IGMP_V2_MEMBERSHIP_REPORT       0x16    /* Ver. 2 membership report */
   66 #define IGMP_V2_LEAVE_GROUP             0x17    /* Leave-group message      */
   67 
   68 #define IGMP_DVMRP                      0x13    /* DVMRP routing message    */
   69 #define IGMP_PIM                        0x14    /* PIM routing message      */
   70 
   71 #define IGMP_MTRACE_RESP                0x1e  /* traceroute resp.(to sender)*/
   72 #define IGMP_MTRACE                     0x1f  /* mcast traceroute messages  */
   73 
   74 #define IGMP_MAX_HOST_REPORT_DELAY   10    /* max delay for response to     */
   75                                            /*  query (in seconds) according */
   76                                            /*  to RFC1112                   */
   77 
   78 
   79 #define IGMP_TIMER_SCALE     10         /* denotes that the igmp code field */
   80                                         /* specifies time in 10th of seconds*/
   81 
   82 /*
   83  * The following four defininitions are for backwards compatibility.
   84  * They should be removed as soon as all applications are updated to
   85  * use the new constant names.
   86  */
   87 #define IGMP_HOST_MEMBERSHIP_QUERY      IGMP_MEMBERSHIP_QUERY
   88 #define IGMP_HOST_MEMBERSHIP_REPORT     IGMP_V1_MEMBERSHIP_REPORT
   89 #define IGMP_HOST_NEW_MEMBERSHIP_REPORT IGMP_V2_MEMBERSHIP_REPORT
   90 #define IGMP_HOST_LEAVE_MESSAGE         IGMP_V2_LEAVE_GROUP
   91 
   92 #endif /* _NETINET_IGMP_H_ */

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