The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 /*      $OpenBSD: igmp.h,v 1.6 2003/06/02 23:28:13 millert Exp $        */
    2 /*      $NetBSD: igmp.h,v 1.6 1995/05/31 06:08:21 mycroft Exp $ */
    3 
    4 /*
    5  * Copyright (c) 1988 Stephen Deering.
    6  * Copyright (c) 1992, 1993
    7  *      The Regents of the University of California.  All rights reserved.
    8  *
    9  * This code is derived from software contributed to Berkeley by
   10  * Stephen Deering of Stanford University.
   11  *
   12  * Redistribution and use in source and binary forms, with or without
   13  * modification, are permitted provided that the following conditions
   14  * are met:
   15  * 1. Redistributions of source code must retain the above copyright
   16  *    notice, this list of conditions and the following disclaimer.
   17  * 2. Redistributions in binary form must reproduce the above copyright
   18  *    notice, this list of conditions and the following disclaimer in the
   19  *    documentation and/or other materials provided with the distribution.
   20  * 3. Neither the name of the University nor the names of its contributors
   21  *    may be used to endorse or promote products derived from this software
   22  *    without specific prior written permission.
   23  *
   24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   34  * SUCH DAMAGE.
   35  *
   36  *      @(#)igmp.h      8.1 (Berkeley) 6/10/93
   37  */
   38 
   39 #ifndef _NETINET_IGMP_H_
   40 #define _NETINET_IGMP_H_
   41 
   42 /*
   43  * Internet Group Management Protocol (IGMP) definitions.
   44  *
   45  * MULTICAST 1.3
   46  */
   47 
   48 /*
   49  * IGMP packet format.
   50  */
   51 struct igmp {
   52         u_int8_t        igmp_type;      /* version & type of IGMP message  */
   53         u_int8_t        igmp_code;      /* code for routing sub-messages   */
   54         u_int16_t       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 #define IGMP_HOST_MEMBERSHIP_QUERY      0x11  /* membership query      */
   61 #define IGMP_v1_HOST_MEMBERSHIP_REPORT  0x12  /* v1 membership report  */
   62 #define IGMP_DVMRP                      0x13  /* DVMRP routing message */
   63 #define IGMP_PIM                        0x14  /* PIM routing message   */
   64 #define IGMP_v2_HOST_MEMBERSHIP_REPORT  0x16  /* v2 membership report  */
   65 #define IGMP_HOST_LEAVE_MESSAGE         0x17  /* leave-group message   */
   66 #define IGMP_MTRACE_REPLY               0x1e  /* traceroute reply      */
   67 #define IGMP_MTRACE_QUERY               0x1f  /* traceroute query      */
   68 
   69 #define IGMP_MAX_HOST_REPORT_DELAY      10    /* max delay for response to */
   70                                               /*  query (in seconds)       */
   71 
   72 #define IGMP_TIMER_SCALE                10    /* denominator for igmp_timer */
   73 
   74 /*
   75  * States for the IGMP v2 state table.
   76  */
   77 #define IGMP_DELAYING_MEMBER    1
   78 #define IGMP_IDLE_MEMBER        2
   79 #define IGMP_LAZY_MEMBER        3
   80 #define IGMP_SLEEPING_MEMBER    4
   81 #define IGMP_AWAKENING_MEMBER   5
   82 
   83 /*
   84  * States for IGMP router version cache.
   85  */
   86 #define IGMP_v1_ROUTER          1
   87 #define IGMP_v2_ROUTER          2
   88 
   89 /*
   90  * Revert to v2 if we haven't heard from the router in this amount of time.
   91  */
   92 #define IGMP_AGE_THRESHOLD      540
   93 
   94 #ifdef _KERNEL
   95 void    rti_delete(struct ifnet *);
   96 #endif /* _KERNEL */
   97 #endif /* _NETINET_IGMP_H_ */

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