2 * Copyright (c) 2009 Bruce Simpson.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
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
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
31 #ifndef _NETINET6_MLD6_H_
32 #define _NETINET6_MLD6_H_
35 * Multicast Listener Discovery (MLD) definitions.
38 /* Minimum length of any MLD protocol message. */
39 #define MLD_MINLEN sizeof(struct icmp6_hdr)
42 * MLD v2 query format.
43 * See <netinet/icmp6.h> for struct mld_hdr
44 * (MLDv1 query and host report format).
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 */
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)
64 * MLDv2 host membership report header.
65 * mld_type: MLDV2_LISTENER_REPORT
68 struct icmp6_hdr mld_icmp6_hdr;
69 /* followed by 1..numgrps records */
71 /* overlaid on struct icmp6_hdr. */
72 #define mld_numrecs mld_icmp6_hdr.icmp6_data16[1]
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 */
81 #define MLD_V2_REPORT_MAXRECS 65535
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 */
97 #define MLD_V2_GENERAL_QUERY 1
98 #define MLD_V2_GROUP_QUERY 2
99 #define MLD_V2_GROUP_SOURCE_QUERY 3
102 * Maximum report interval for MLDv1 host membership reports.
104 #define MLD_V1_MAX_RI 10
107 * MLD_TIMER_SCALE denotes that the MLD code field specifies
108 * time in milliseconds.
110 #define MLD_TIMER_SCALE 1000
112 #endif /* _NETINET6_MLD6_H_ */