1/*- 2 * Copyright (c) 2009 Bruce Simpson. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 3. The name of the author may not be used to endorse or promote 13 * products derived from this software without specific prior written 14 * permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31#ifndef _NETINET6_MLD6_H_ 32#define _NETINET6_MLD6_H_ 33 34/* 35 * Multicast Listener Discovery (MLD) definitions. 36 */ 37 38/* Minimum length of any MLD protocol message. */ 39#define MLD_MINLEN sizeof(struct icmp6_hdr) 40 41/* 42 * MLD v2 query format. 43 * See <netinet/icmp6.h> for struct mld_hdr 44 * (MLDv1 query and host report format). 45 */ 46struct mldv2_query { 47 struct icmp6_hdr mld_icmp6_hdr; /* ICMPv6 header */ 48 struct in6_addr mld_addr; /* address being queried */ 49 uint8_t mld_misc; /* reserved/suppress/robustness */ 50 uint8_t mld_qqi; /* querier's query interval */ 51 uint16_t mld_numsrc; /* number of sources */ 52 /* followed by 1..numsrc source addresses */ 53} __packed; 54#define MLD_V2_QUERY_MINLEN sizeof(struct mldv2_query) 55#define MLD_MRC_EXP(x) ((ntohs((x)) >> 12) & 0x0007) 56#define MLD_MRC_MANT(x) (ntohs((x)) & 0x0fff) 57#define MLD_QQIC_EXP(x) (((x) >> 4) & 0x07) 58#define MLD_QQIC_MANT(x) ((x) & 0x0f) 59#define MLD_QRESV(x) (((x) >> 4) & 0x0f) 60#define MLD_SFLAG(x) (((x) >> 3) & 0x01) 61#define MLD_QRV(x) ((x) & 0x07) 62 63/* 64 * MLDv2 host membership report header. 65 * mld_type: MLDV2_LISTENER_REPORT 66 */ 67struct mldv2_report { 68 struct icmp6_hdr mld_icmp6_hdr; 69 /* followed by 1..numgrps records */ 70} __packed; 71/* overlaid on struct icmp6_hdr. */ 72#define mld_numrecs mld_icmp6_hdr.icmp6_data16[1] 73 74struct mldv2_record { 75 uint8_t mr_type; /* record type */ 76 uint8_t mr_datalen; /* length of auxiliary data */ 77 uint16_t mr_numsrc; /* number of sources */ 78 struct in6_addr mr_addr; /* address being reported */ 79 /* followed by 1..numsrc source addresses */ 80} __packed; 81#define MLD_V2_REPORT_MAXRECS 65535 82 83/* 84 * MLDv2 report modes. 85 */ 86#define MLD_DO_NOTHING 0 /* don't send a record */ 87#define MLD_MODE_IS_INCLUDE 1 /* MODE_IN */ 88#define MLD_MODE_IS_EXCLUDE 2 /* MODE_EX */ 89#define MLD_CHANGE_TO_INCLUDE_MODE 3 /* TO_IN */ 90#define MLD_CHANGE_TO_EXCLUDE_MODE 4 /* TO_EX */ 91#define MLD_ALLOW_NEW_SOURCES 5 /* ALLOW_NEW */ 92#define MLD_BLOCK_OLD_SOURCES 6 /* BLOCK_OLD */ 93 94/* 95 * MLDv2 query types. 96 */ 97#define MLD_V2_GENERAL_QUERY 1 98#define MLD_V2_GROUP_QUERY 2 99#define MLD_V2_GROUP_SOURCE_QUERY 3 100 101/* 102 * Maximum report interval for MLDv1 host membership reports. 103 */ 104#define MLD_V1_MAX_RI 10 105 106/* 107 * MLD_TIMER_SCALE denotes that the MLD code field specifies 108 * time in milliseconds. 109 */ 110#define MLD_TIMER_SCALE 1000 111 112#endif /* _NETINET6_MLD6_H_ */ 113