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/* $OpenBSD: mld6.h,v 1.2 2010/03/22 21:29:22 jsg Exp $ */
/* $FreeBSD: mld6.h,v 1.1 2009/04/29 11:31:23 bms Exp $ */
/*-
* Copyright (c) 2009 Bruce Simpson.
*
* 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. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
*/
#ifndef _NETINET6_MLD6_H_
#define _NETINET6_MLD6_H_
/*
* Multicast Listener Discovery (MLD) definitions.
*/
/* Minimum length of any MLD protocol message. */
#define MLD_MINLEN sizeof(struct icmp6_hdr)
/*
* MLD v2 query format.
* See <netinet/icmp6.h> for struct mld_hdr
* (MLDv1 query and host report format).
*/
struct mldv2_query {
struct icmp6_hdr mld_icmp6_hdr; /* ICMPv6 header */
struct in6_addr mld_addr; /* address being queried */
uint8_t mld_misc; /* reserved/suppress/robustness */
uint8_t mld_qqi; /* querier's query interval */
uint16_t mld_numsrc; /* number of sources */
/* followed by 1..numsrc source addresses */
} __packed;
#define MLD_V2_QUERY_MINLEN sizeof(struct mldv2_query)
#define MLD_MRC_EXP(x) ((ntohs((x)) >> 12) & 0x0007)
#define MLD_MRC_MANT(x) (ntohs((x)) & 0x0fff)
#define MLD_QQIC_EXP(x) (((x) >> 4) & 0x07)
#define MLD_QQIC_MANT(x) ((x) & 0x0f)
#define MLD_QRESV(x) (((x) >> 4) & 0x0f)
#define MLD_SFLAG(x) (((x) >> 3) & 0x01)
#define MLD_QRV(x) ((x) & 0x07)
/*
* MLDv2 host membership report header.
* mld_type: MLDV2_LISTENER_REPORT
*/
struct mldv2_report {
struct icmp6_hdr mld_icmp6_hdr;
/* followed by 1..numgrps records */
} __packed;
/* overlaid on struct icmp6_hdr. */
#define mld_numrecs mld_icmp6_hdr.icmp6_data16[1]
struct mldv2_record {
uint8_t mr_type; /* record type */
uint8_t mr_datalen; /* length of auxiliary data */
uint16_t mr_numsrc; /* number of sources */
struct in6_addr mr_addr; /* address being reported */
/* followed by 1..numsrc source addresses */
} __packed;
#define MLD_V2_REPORT_MAXRECS 65535
/*
* MLDv2 report modes.
*/
#define MLD_DO_NOTHING 0 /* don't send a record */
#define MLD_MODE_IS_INCLUDE 1 /* MODE_IN */
#define MLD_MODE_IS_EXCLUDE 2 /* MODE_EX */
#define MLD_CHANGE_TO_INCLUDE_MODE 3 /* TO_IN */
#define MLD_CHANGE_TO_EXCLUDE_MODE 4 /* TO_EX */
#define MLD_ALLOW_NEW_SOURCES 5 /* ALLOW_NEW */
#define MLD_BLOCK_OLD_SOURCES 6 /* BLOCK_OLD */
/*
* MLDv2 query types.
*/
#define MLD_V2_GENERAL_QUERY 1
#define MLD_V2_GROUP_QUERY 2
#define MLD_V2_GROUP_SOURCE_QUERY 3
/*
* Maximum report interval for MLDv1 host membership reports (in seconds)
*/
#define MLD_V1_MAX_RI 10
/*
* MLD_TIMER_SCALE denotes that the MLD code field specifies
* time in milliseconds.
*/
#define MLD_TIMER_SCALE 1000
#endif /* _NETINET6_MLD6_H_ */
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