sys/netinet/igmp.h

   1 /*      $NetBSD: igmp.h,v 1.10 2005/12/10 23:36:23 elad Exp $   */
   2
   3 /*
   4  * Copyright (c) 1992, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * Stephen Deering of Stanford University.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  *      @(#)igmp.h      8.1 (Berkeley) 6/10/93
  35  */
  36
  37 /*
  38  * Copyright (c) 1988 Stephen Deering.
  39  *
  40  * This code is derived from software contributed to Berkeley by
  41  * Stephen Deering of Stanford University.
  42  *
  43  * Redistribution and use in source and binary forms, with or without
  44  * modification, are permitted provided that the following conditions
  45  * are met:
  46  * 1. Redistributions of source code must retain the above copyright
  47  *    notice, this list of conditions and the following disclaimer.
  48  * 2. Redistributions in binary form must reproduce the above copyright
  49  *    notice, this list of conditions and the following disclaimer in the
  50  *    documentation and/or other materials provided with the distribution.
  51  * 3. All advertising materials mentioning features or use of this software
  52  *    must display the following acknowledgement:
  53  *      This product includes software developed by the University of
  54  *      California, Berkeley and its contributors.
  55  * 4. Neither the name of the University nor the names of its contributors
  56  *    may be used to endorse or promote products derived from this software
  57  *    without specific prior written permission.
  58  *
  59  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  60  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  61  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  62  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  63  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  64  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  65  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  66  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  67  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  68  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  69  * SUCH DAMAGE.
  70  *
  71  *      @(#)igmp.h      8.1 (Berkeley) 6/10/93
  72  */
  73
  74 #ifndef _NETINET_IGMP_H_
  75 #define _NETINET_IGMP_H_
  76
  77 /*
  78  * Internet Group Management Protocol (IGMP) definitions.
  79  *
  80  * MULTICAST 1.3
  81  */
  82
  83 /*
  84  * IGMP packet format.
  85  */
  86 struct igmp {
  87         u_int8_t        igmp_type;      /* version & type of IGMP message  */
  88         u_int8_t        igmp_code;      /* code for routing sub-messages   */
  89         u_int16_t       igmp_cksum;     /* IP-style checksum               */
  90         struct in_addr  igmp_group;     /* group address being reported    */
  91 } __packed;             /*  (zero for queries)             */
  92
  93 #define IGMP_MINLEN                  8
  94
  95 #define IGMP_HOST_MEMBERSHIP_QUERY      0x11  /* membership query      */
  96 #define IGMP_v1_HOST_MEMBERSHIP_REPORT  0x12  /* v1 membership report  */
  97 #define IGMP_DVMRP                      0x13  /* DVMRP routing message */
  98 #define IGMP_PIM                        0x14  /* PIM routing message   */
  99 #define IGMP_v2_HOST_MEMBERSHIP_REPORT  0x16  /* v2 membership report  */
 100 #define IGMP_HOST_LEAVE_MESSAGE         0x17  /* leave-group message   */
 101 #define IGMP_MTRACE_REPLY               0x1e  /* traceroute reply      */
 102 #define IGMP_MTRACE_QUERY               0x1f  /* traceroute query      */
 103
 104 #define IGMP_MAX_HOST_REPORT_DELAY      10    /* max delay for response to */
 105                                               /*  query (in seconds)       */
 106
 107 #define IGMP_TIMER_SCALE                10    /* denominator for igmp_timer */
 108
 109 /*
 110  * States for the IGMP v2 state table.
 111  */
 112 #define IGMP_DELAYING_MEMBER    1
 113 #define IGMP_IDLE_MEMBER        2
 114 #define IGMP_LAZY_MEMBER        3
 115 #define IGMP_SLEEPING_MEMBER    4
 116 #define IGMP_AWAKENING_MEMBER   5
 117
 118 /*
 119  * States for IGMP router version cache.
 120  */
 121 #define IGMP_v1_ROUTER          1
 122 #define IGMP_v2_ROUTER          2
 123
 124 /*
 125  * Revert to v2 if we haven't heard from the router in this amount of time.
 126  */
 127 #define IGMP_AGE_THRESHOLD      540
 128
 129 #endif /* !_NETINET_IGMP_H_ */