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/* $OpenBSD: igmp.h,v 1.3 1999/08/08 00:43:00 niklas Exp $ */
/* $NetBSD: igmp.h,v 1.6 1995/05/31 06:08:21 mycroft Exp $ */
/*
* Copyright (c) 1988 Stephen Deering.
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Stephen Deering of Stanford University.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)igmp.h 8.1 (Berkeley) 6/10/93
*/
/*
* Internet Group Management Protocol (IGMP) definitions.
*
* MULTICAST 1.3
*/
/*
* IGMP packet format.
*/
struct igmp {
u_int8_t igmp_type; /* version & type of IGMP message */
u_int8_t igmp_code; /* code for routing sub-messages */
u_int16_t igmp_cksum; /* IP-style checksum */
struct in_addr igmp_group; /* group address being reported */
}; /* (zero for queries) */
#define IGMP_MINLEN 8
#define IGMP_HOST_MEMBERSHIP_QUERY 0x11 /* membership query */
#define IGMP_v1_HOST_MEMBERSHIP_REPORT 0x12 /* v1 membership report */
#define IGMP_DVMRP 0x13 /* DVMRP routing message */
#define IGMP_PIM 0x14 /* PIM routing message */
#define IGMP_v2_HOST_MEMBERSHIP_REPORT 0x16 /* v2 membership report */
#define IGMP_HOST_LEAVE_MESSAGE 0x17 /* leave-group message */
#define IGMP_MTRACE_REPLY 0x1e /* traceroute reply */
#define IGMP_MTRACE_QUERY 0x1f /* traceroute query */
#define IGMP_MAX_HOST_REPORT_DELAY 10 /* max delay for response to */
/* query (in seconds) */
#define IGMP_TIMER_SCALE 10 /* denominator for igmp_timer */
/*
* States for the IGMP v2 state table.
*/
#define IGMP_DELAYING_MEMBER 1
#define IGMP_IDLE_MEMBER 2
#define IGMP_LAZY_MEMBER 3
#define IGMP_SLEEPING_MEMBER 4
#define IGMP_AWAKENING_MEMBER 5
/*
* States for IGMP router version cache.
*/
#define IGMP_v1_ROUTER 1
#define IGMP_v2_ROUTER 2
/*
* Revert to v2 if we haven't heard from the router in this amount of time.
*/
#define IGMP_AGE_THRESHOLD 540
#ifdef _KERNEL
void rti_delete __P((struct ifnet *));
#endif
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