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