| 1 | /* $OpenBSD: mld6.h,v 1.2 2010/03/22 21:29:22 jsg Exp $ */ |
| 2 | /* $FreeBSD: mld6.h,v 1.1 2009/04/29 11:31:23 bms Exp $ */ |
| 3 | /*- |
| 4 | * Copyright (c) 2009 Bruce Simpson. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions |
| 8 | * are met: |
| 9 | * 1. Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * 2. Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in the |
| 13 | * documentation and/or other materials provided with the distribution. |
| 14 | * 3. The name of the author may not be used to endorse or promote |
| 15 | * products derived from this software without specific prior written |
| 16 | * permission. |
| 17 | * |
| 18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| 19 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 20 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 21 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 22 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 23 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 24 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 25 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 26 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 27 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 28 | * SUCH DAMAGE. |
| 29 | * |
| 30 | */ |
| 31 | |
| 32 | #ifndef _NETINET6_MLD6_H_ |
| 33 | #define _NETINET6_MLD6_H_ |
| 34 | |
| 35 | /* |
| 36 | * Multicast Listener Discovery (MLD) definitions. |
| 37 | */ |
| 38 | |
| 39 | /* Minimum length of any MLD protocol message. */ |
| 40 | #define MLD_MINLEN sizeof(struct icmp6_hdr) |
| 41 | |
| 42 | /* |
| 43 | * MLD v2 query format. |
| 44 | * See <netinet/icmp6.h> for struct mld_hdr |
| 45 | * (MLDv1 query and host report format). |
| 46 | */ |
| 47 | struct mldv2_query { |
| 48 | struct icmp6_hdr mld_icmp6_hdr; /* ICMPv6 header */ |
| 49 | struct in6_addr mld_addr; /* address being queried */ |
| 50 | uint8_t mld_misc; /* reserved/suppress/robustness */ |
| 51 | uint8_t mld_qqi; /* querier's query interval */ |
| 52 | uint16_t mld_numsrc; /* number of sources */ |
| 53 | /* followed by 1..numsrc source addresses */ |
| 54 | } __packed; |
| 55 | #define MLD_V2_QUERY_MINLEN sizeof(struct mldv2_query) |
| 56 | #define MLD_MRC_EXP(x) ((ntohs((x)) >> 12) & 0x0007) |
| 57 | #define MLD_MRC_MANT(x) (ntohs((x)) & 0x0fff) |
| 58 | #define MLD_QQIC_EXP(x) (((x) >> 4) & 0x07) |
| 59 | #define MLD_QQIC_MANT(x) ((x) & 0x0f) |
| 60 | #define MLD_QRESV(x) (((x) >> 4) & 0x0f) |
| 61 | #define MLD_SFLAG(x) (((x) >> 3) & 0x01) |
| 62 | #define MLD_QRV(x) ((x) & 0x07) |
| 63 | |
| 64 | /* |
| 65 | * MLDv2 host membership report header. |
| 66 | * mld_type: MLDV2_LISTENER_REPORT |
| 67 | */ |
| 68 | struct mldv2_report { |
| 69 | struct icmp6_hdr mld_icmp6_hdr; |
| 70 | /* followed by 1..numgrps records */ |
| 71 | } __packed; |
| 72 | /* overlaid on struct icmp6_hdr. */ |
| 73 | #define mld_numrecs mld_icmp6_hdr.icmp6_data16[1] |
| 74 | |
| 75 | struct mldv2_record { |
| 76 | uint8_t mr_type; /* record type */ |
| 77 | uint8_t mr_datalen; /* length of auxiliary data */ |
| 78 | uint16_t mr_numsrc; /* number of sources */ |
| 79 | struct in6_addr mr_addr; /* address being reported */ |
| 80 | /* followed by 1..numsrc source addresses */ |
| 81 | } __packed; |
| 82 | #define MLD_V2_REPORT_MAXRECS 65535 |
| 83 | |
| 84 | /* |
| 85 | * MLDv2 report modes. |
| 86 | */ |
| 87 | #define MLD_DO_NOTHING 0 /* don't send a record */ |
| 88 | #define MLD_MODE_IS_INCLUDE 1 /* MODE_IN */ |
| 89 | #define MLD_MODE_IS_EXCLUDE 2 /* MODE_EX */ |
| 90 | #define MLD_CHANGE_TO_INCLUDE_MODE 3 /* TO_IN */ |
| 91 | #define MLD_CHANGE_TO_EXCLUDE_MODE 4 /* TO_EX */ |
| 92 | #define MLD_ALLOW_NEW_SOURCES 5 /* ALLOW_NEW */ |
| 93 | #define MLD_BLOCK_OLD_SOURCES 6 /* BLOCK_OLD */ |
| 94 | |
| 95 | /* |
| 96 | * MLDv2 query types. |
| 97 | */ |
| 98 | #define MLD_V2_GENERAL_QUERY 1 |
| 99 | #define MLD_V2_GROUP_QUERY 2 |
| 100 | #define MLD_V2_GROUP_SOURCE_QUERY 3 |
| 101 | |
| 102 | /* |
| 103 | * Maximum report interval for MLDv1 host membership reports (in seconds) |
| 104 | */ |
| 105 | #define MLD_V1_MAX_RI 10 |
| 106 | |
| 107 | /* |
| 108 | * MLD_TIMER_SCALE denotes that the MLD code field specifies |
| 109 | * time in milliseconds. |
| 110 | */ |
| 111 | #define MLD_TIMER_SCALE 1000 |
| 112 | |
| 113 | #endif /* _NETINET6_MLD6_H_ */ |