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
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30 #ifndef _NETINET6_MLD6_VAR_H_
31 #define _NETINET6_MLD6_VAR_H_
34 * Multicast Listener Discovery (MLD)
35 * implementation-specific definitions.
44 LIST_ENTRY(mld_ifinfo) mli_link;
45 struct ifnet *mli_ifp; /* interface this instance belongs to */
46 uint32_t mli_version; /* MLDv1 Host Compatibility Mode */
47 uint32_t mli_v1_timer; /* MLDv1 Querier Present timer (s) */
48 uint32_t mli_v2_timer; /* MLDv2 General Query (interface) timer (s)*/
49 uint32_t mli_flags; /* MLD per-interface flags */
50 uint32_t mli_rv; /* MLDv2 Robustness Variable */
51 uint32_t mli_qi; /* MLDv2 Query Interval (s) */
52 uint32_t mli_qri; /* MLDv2 Query Response Interval (s) */
53 uint32_t mli_uri; /* MLDv2 Unsolicited Report Interval (s) */
54 SLIST_HEAD(,in6_multi) mli_relinmhead; /* released groups */
55 struct ifqueue mli_gq; /* queue of general query responses */
57 #define MLIF_SILENT 0x00000001 /* Do not use MLD on this ifp */
59 #define MLD_RANDOM_DELAY(X) (arc4random() % (X) + 1)
60 #define MLD_MAX_STATE_CHANGES 24 /* Max pending changes per group */
63 * MLD per-group states.
65 #define MLD_NOT_MEMBER 0 /* Can garbage collect group */
66 #define MLD_SILENT_MEMBER 1 /* Do not perform MLD for group */
67 #define MLD_REPORTING_MEMBER 2 /* MLDv1 we are reporter */
68 #define MLD_IDLE_MEMBER 3 /* MLDv1 we reported last */
69 #define MLD_LAZY_MEMBER 4 /* MLDv1 other member reporting */
70 #define MLD_SLEEPING_MEMBER 5 /* MLDv1 start query response */
71 #define MLD_AWAKENING_MEMBER 6 /* MLDv1 group timer will start */
72 #define MLD_G_QUERY_PENDING_MEMBER 7 /* MLDv2 group query pending */
73 #define MLD_SG_QUERY_PENDING_MEMBER 8 /* MLDv2 source query pending */
74 #define MLD_LEAVING_MEMBER 9 /* MLDv2 dying gasp (pending last */
75 /* retransmission of INCLUDE {}) */
80 #define MLD_VERSION_NONE 0 /* Invalid */
81 #define MLD_VERSION_1 1
82 #define MLD_VERSION_2 2 /* Default */
85 * MLDv2 protocol control variables.
87 #define MLD_RV_INIT 2 /* Robustness Variable */
91 #define MLD_QI_INIT 125 /* Query Interval (s) */
93 #define MLD_QI_MAX 255
95 #define MLD_QRI_INIT 10 /* Query Response Interval (s) */
97 #define MLD_QRI_MAX 255
99 #define MLD_URI_INIT 3 /* Unsolicited Report Interval (s) */
100 #define MLD_URI_MIN 0
101 #define MLD_URI_MAX 10
103 #define MLD_MAX_GS_SOURCES 256 /* # of sources in rx GS query */
104 #define MLD_MAX_G_GS_PACKETS 8 /* # of packets to answer G/GS */
105 #define MLD_MAX_STATE_CHANGE_PACKETS 8 /* # of packets per state change */
106 #define MLD_MAX_RESPONSE_PACKETS 16 /* # of packets for general query */
107 #define MLD_MAX_RESPONSE_BURST 4 /* # of responses to send at once */
108 #define MLD_RESPONSE_BURST_INTERVAL (PR_FASTHZ / 2) /* 500ms */
111 * MLD-specific mbuf flags.
113 #define M_MLDV1 M_PROTO1 /* Packet is MLDv1 */
114 #define M_GROUPREC M_PROTO3 /* mbuf chain is a group record */
117 * Leading space for MLDv2 reports inside MTU.
119 * NOTE: This differs from IGMPv3 significantly. KAME IPv6 requires
120 * that a fully formed mbuf chain *without* the Router Alert option
121 * is passed to ip6_output(), however we must account for it in the
122 * MTU if we need to split an MLDv2 report into several packets.
124 * We now put the MLDv2 report header in the initial mbuf containing
127 #define MLD_MTUSPACE (sizeof(struct ip6_hdr) + sizeof(struct mld_raopt) + \
128 sizeof(struct icmp6_hdr))
131 * Subsystem lock macros.
132 * The MLD lock is only taken with MLD. Currently it is system-wide.
133 * VIMAGE: The lock could be pushed to per-VIMAGE granularity in future.
135 #define MLD_LOCK_INIT() mtx_init(&mld_mtx, "mld_mtx", NULL, MTX_DEF)
136 #define MLD_LOCK_DESTROY() mtx_destroy(&mld_mtx)
137 #define MLD_LOCK() mtx_lock(&mld_mtx)
138 #define MLD_LOCK_ASSERT() mtx_assert(&mld_mtx, MA_OWNED)
139 #define MLD_UNLOCK() mtx_unlock(&mld_mtx)
140 #define MLD_UNLOCK_ASSERT() mtx_assert(&mld_mtx, MA_NOTOWNED)
143 * Per-link MLD context.
145 #define MLD_IFINFO(ifp) \
146 (((struct in6_ifextra *)(ifp)->if_afdata[AF_INET6])->mld_ifinfo)
148 int mld_change_state(struct in6_multi *, const int);
150 mld_domifattach(struct ifnet *);
151 void mld_domifdetach(struct ifnet *);
152 void mld_fasttimo(void);
153 void mld_ifdetach(struct ifnet *);
154 int mld_input(struct mbuf *, int, int);
155 void mld_slowtimo(void);
158 SYSCTL_DECL(_net_inet6_mld);
163 #endif /* _NETINET6_MLD6_VAR_H_ */