107 lines
4.0 KiB
C
107 lines
4.0 KiB
C
/*
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* Copyright (c) 1988 Stephen Deering.
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Stephen Deering of Stanford University.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)igmp.h 8.1 (Berkeley) 6/10/93
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* $Id: igmp.h,v 1.4 1994/09/06 22:42:17 wollman Exp $
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*/
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#ifndef _NETINET_IGMP_H_
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#define _NETINET_IGMP_H_
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/*
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* Internet Group Management Protocol (IGMP) definitions.
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*
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* Written by Steve Deering, Stanford, May 1988.
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*
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* MULTICAST Revision: 3.3.1.2
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*/
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/*
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* IGMP packet format.
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*/
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struct igmp {
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u_char igmp_type; /* version & type of IGMP message */
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u_char igmp_code; /* subtype for routing msgs */
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u_short igmp_cksum; /* IP-style checksum */
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struct in_addr igmp_group; /* group address being reported */
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}; /* (zero for queries) */
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#define IGMP_MINLEN 8
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/*
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* Message types, including version number.
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*/
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#define IGMP_HOST_MEMBERSHIP_QUERY 0x11 /* Host membership query */
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#define IGMP_HOST_MEMBERSHIP_REPORT 0x12 /* Old membership report */
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#define IGMP_DVMRP 0x13 /* DVMRP routing message */
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#define IGMP_PIM 0x14 /* PIM routing message */
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#define IGMP_HOST_NEW_MEMBERSHIP_REPORT 0x16 /* New membership report */
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#define IGMP_HOST_LEAVE_MESSAGE 0x17 /* Leave-group message */
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#define IGMP_MTRACE_RESP 0x1e /* traceroute resp. (to sender) */
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#define IGMP_MTRACE 0x1f /* mcast traceroute messages */
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#define IGMP_MAX_HOST_REPORT_DELAY 10 /* max delay for response to */
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/* query (in seconds) */
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#define IGMP_TIMER_SCALE 10 /* denotes that the igmp->timer filed */
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/*specifies time in tenths of seconds */
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/*
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* States for the IGMPv2 state table
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*/
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#define IGMP_DELAYING_MEMBER 1
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#define IGMP_IDLE_MEMBER 2
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#define IGMP_LAZY_MEMBER 3
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#define IGMP_SLEEPING_MEMBER 4
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#define IGMP_AWAKENING_MEMBER 5
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/*
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* We must remember whether the querier is an old or a new router.
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*/
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#define IGMP_OLD_ROUTER 0
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#define IGMP_NEW_ROUTER 1
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/*
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* Revert to new router if we haven't heard from an old router in
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* this amount of time.
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*/
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#define IGMP_AGE_THRESHOLD 540
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#endif /* _NETINET_IGMP_H_ */
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