/*-
* 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.
* 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
* $FreeBSD$
*/
#ifndef _NETINET_IGMP_H_
#define _NETINET_IGMP_H_
/*
* Internet Group Management Protocol (IGMP) definitions.
*
* Written by Steve Deering, Stanford, May 1988.
*
* MULTICAST Revision: 3.5.1.2
*/
/* Minimum length of any IGMP protocol message. */
#define IGMP_MINLEN 8
/*
* IGMPv1/v2 query and host report format.
*/
struct igmp {
u_char igmp_type; /* version & type of IGMP message */
u_char igmp_code; /* subtype for routing msgs */
u_short igmp_cksum; /* IP-style checksum */
struct in_addr igmp_group; /* group address being reported */
}; /* (zero for queries) */
/*
* IGMP v3 query format.
*/
struct igmpv3 {
u_char igmp_type; /* version & type of IGMP message */
u_char igmp_code; /* subtype for routing msgs */
u_short igmp_cksum; /* IP-style checksum */
struct in_addr igmp_group; /* group address being reported */
/* (zero for queries) */
u_char igmp_misc; /* reserved/suppress/robustness */
u_char igmp_qqi; /* querier's query interval */
u_short igmp_numsrc; /* number of sources */
/*struct in_addr igmp_sources[1];*/ /* source addresses */
};
#define IGMP_V3_QUERY_MINLEN 12
#define IGMP_EXP(x) (((x) >> 4) & 0x07)
#define IGMP_MANT(x) ((x) & 0x0f)
#define IGMP_QRESV(x) (((x) >> 4) & 0x0f)
#define IGMP_SFLAG(x) (((x) >> 3) & 0x01)
#define IGMP_QRV(x) ((x) & 0x07)
struct igmp_grouprec {
u_char ig_type; /* record type */
u_char ig_datalen; /* length of auxiliary data */
u_short ig_numsrc; /* number of sources */
struct in_addr ig_group; /* group address being reported */
/*struct in_addr ig_sources[1];*/ /* source addresses */
};
#define IGMP_GRPREC_HDRLEN 8
/*
* IGMPv3 host membership report header.
*/
struct igmp_report {
u_char ir_type; /* IGMP_v3_HOST_MEMBERSHIP_REPORT */
u_char ir_rsv1; /* must be zero */
u_short ir_cksum; /* checksum */
u_short ir_rsv2; /* must be zero */
u_short ir_numgrps; /* number of group records */
/*struct igmp_grouprec ir_groups[1];*/ /* group records */
};
#define IGMP_V3_REPORT_MINLEN 8
#define IGMP_V3_REPORT_MAXRECS 65535
/*
* Message types, including version number.
*/
#define IGMP_HOST_MEMBERSHIP_QUERY 0x11 /* membership query */
#define IGMP_v1_HOST_MEMBERSHIP_REPORT 0x12 /* Ver. 1 membership report */
#define IGMP_DVMRP 0x13 /* DVMRP routing message */
#define IGMP_PIM 0x14 /* PIMv1 message (historic) */
#define IGMP_v2_HOST_MEMBERSHIP_REPORT 0x16 /* Ver. 2 membership report */
#define IGMP_HOST_LEAVE_MESSAGE 0x17 /* Leave-group message */
#define IGMP_MTRACE_REPLY 0x1e /* mtrace(8) reply */
#define IGMP_MTRACE_QUERY 0x1f /* mtrace(8) probe */
#define IGMP_v3_HOST_MEMBERSHIP_REPORT 0x22 /* Ver. 3 membership report */
/*
* IGMPv3 report modes.
*/
#define IGMP_DO_NOTHING 0 /* don't send a record */
#define IGMP_MODE_IS_INCLUDE 1 /* MODE_IN */
#define IGMP_MODE_IS_EXCLUDE 2 /* MODE_EX */
#define IGMP_CHANGE_TO_INCLUDE_MODE 3 /* TO_IN */
#define IGMP_CHANGE_TO_EXCLUDE_MODE 4 /* TO_EX */
#define IGMP_ALLOW_NEW_SOURCES 5 /* ALLOW_NEW */
#define IGMP_BLOCK_OLD_SOURCES 6 /* BLOCK_OLD */
/*
* IGMPv3 query types.
*/
#define IGMP_V3_GENERAL_QUERY 1
#define IGMP_V3_GROUP_QUERY 2
#define IGMP_V3_GROUP_SOURCE_QUERY 3
/*
* Maximum report interval for IGMP v1/v2 host membership reports [RFC 1112]
*/
#define IGMP_V1V2_MAX_RI 10
#define IGMP_MAX_HOST_REPORT_DELAY IGMP_V1V2_MAX_RI
/*
* IGMP_TIMER_SCALE denotes that the igmp code field specifies
* time in tenths of a second.
*/
#define IGMP_TIMER_SCALE 10
#endif /* _NETINET_IGMP_H_ */
