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- /*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * Copyright (c) 2009 Bruce Simpson.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. The name of the author may not be used to endorse or promote
- * products derived from this software without specific prior written
- * permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * $FreeBSD$
- */
- #ifndef _NETINET6_MLD6_VAR_H_
- #define _NETINET6_MLD6_VAR_H_
- /*
- * Multicast Listener Discovery (MLD)
- * implementation-specific definitions.
- */
- /*
- * MLD per-group states.
- */
- #define MLD_NOT_MEMBER 0 /* Can garbage collect group */
- #define MLD_SILENT_MEMBER 1 /* Do not perform MLD for group */
- #define MLD_REPORTING_MEMBER 2 /* MLDv1 we are reporter */
- #define MLD_IDLE_MEMBER 3 /* MLDv1 we reported last */
- #define MLD_LAZY_MEMBER 4 /* MLDv1 other member reporting */
- #define MLD_SLEEPING_MEMBER 5 /* MLDv1 start query response */
- #define MLD_AWAKENING_MEMBER 6 /* MLDv1 group timer will start */
- #define MLD_G_QUERY_PENDING_MEMBER 7 /* MLDv2 group query pending */
- #define MLD_SG_QUERY_PENDING_MEMBER 8 /* MLDv2 source query pending */
- #define MLD_LEAVING_MEMBER 9 /* MLDv2 dying gasp (pending last */
- /* retransmission of INCLUDE {}) */
- /*
- * MLD version tag.
- */
- #define MLD_VERSION_NONE 0 /* Invalid */
- #define MLD_VERSION_1 1
- #define MLD_VERSION_2 2 /* Default */
- /*
- * MLDv2 protocol control variables.
- */
- #define MLD_RV_INIT 2 /* Robustness Variable */
- #define MLD_RV_MIN 1
- #define MLD_RV_MAX 7
- #define MLD_QI_INIT 125 /* Query Interval (s) */
- #define MLD_QI_MIN 1
- #define MLD_QI_MAX 255
- #define MLD_QRI_INIT 10 /* Query Response Interval (s) */
- #define MLD_QRI_MIN 1
- #define MLD_QRI_MAX 255
- #define MLD_URI_INIT 3 /* Unsolicited Report Interval (s) */
- #define MLD_URI_MIN 0
- #define MLD_URI_MAX 10
- #define MLD_MAX_GS_SOURCES 256 /* # of sources in rx GS query */
- #define MLD_MAX_G_GS_PACKETS 8 /* # of packets to answer G/GS */
- #define MLD_MAX_STATE_CHANGE_PACKETS 8 /* # of packets per state change */
- #define MLD_MAX_RESPONSE_PACKETS 16 /* # of packets for general query */
- #define MLD_MAX_RESPONSE_BURST 4 /* # of responses to send at once */
- #define MLD_RESPONSE_BURST_INTERVAL (PR_FASTHZ / 2) /* 500ms */
- /*
- * MLD-specific mbuf flags.
- */
- #define M_MLDV1 M_PROTO1 /* Packet is MLDv1 */
- #define M_GROUPREC M_PROTO3 /* mbuf chain is a group record */
- /*
- * Leading space for MLDv2 reports inside MTU.
- *
- * NOTE: This differs from IGMPv3 significantly. KAME IPv6 requires
- * that a fully formed mbuf chain *without* the Router Alert option
- * is passed to ip6_output(), however we must account for it in the
- * MTU if we need to split an MLDv2 report into several packets.
- *
- * We now put the MLDv2 report header in the initial mbuf containing
- * the IPv6 header.
- */
- #define MLD_MTUSPACE (sizeof(struct ip6_hdr) + sizeof(struct mld_raopt) + \
- sizeof(struct icmp6_hdr))
- /*
- * Structure returned by net.inet6.mld.ifinfo.
- */
- struct mld_ifinfo {
- uint32_t mli_version; /* MLDv1 Host Compatibility Mode */
- uint32_t mli_v1_timer; /* MLDv1 Querier Present timer (s) */
- uint32_t mli_v2_timer; /* MLDv2 General Query (interface) timer (s)*/
- uint32_t mli_flags; /* MLD per-interface flags */
- #define MLIF_SILENT 0x00000001 /* Do not use MLD on this ifp */
- #define MLIF_USEALLOW 0x00000002 /* Use ALLOW/BLOCK for joins/leaves */
- uint32_t mli_rv; /* MLDv2 Robustness Variable */
- uint32_t mli_qi; /* MLDv2 Query Interval (s) */
- uint32_t mli_qri; /* MLDv2 Query Response Interval (s) */
- uint32_t mli_uri; /* MLDv2 Unsolicited Report Interval (s) */
- };
- #ifdef _KERNEL
- /*
- * Per-link MLD state.
- */
- struct mld_ifsoftc {
- LIST_ENTRY(mld_ifsoftc) mli_link;
- struct ifnet *mli_ifp; /* interface this instance belongs to */
- uint32_t mli_version; /* MLDv1 Host Compatibility Mode */
- uint32_t mli_v1_timer; /* MLDv1 Querier Present timer (s) */
- uint32_t mli_v2_timer; /* MLDv2 General Query (interface) timer (s)*/
- uint32_t mli_flags; /* MLD per-interface flags */
- uint32_t mli_rv; /* MLDv2 Robustness Variable */
- uint32_t mli_qi; /* MLDv2 Query Interval (s) */
- uint32_t mli_qri; /* MLDv2 Query Response Interval (s) */
- uint32_t mli_uri; /* MLDv2 Unsolicited Report Interval (s) */
- struct mbufq mli_gq; /* queue of general query responses */
- };
- #define MLD_RANDOM_DELAY(X) (arc4random() % (X) + 1)
- #define MLD_MAX_STATE_CHANGES 24 /* Max pending changes per group */
- /*
- * Subsystem lock macros.
- * The MLD lock is only taken with MLD. Currently it is system-wide.
- * VIMAGE: The lock could be pushed to per-VIMAGE granularity in future.
- */
- #define MLD_LOCK_INIT() mtx_init(&mld_mtx, "mld_mtx", NULL, MTX_DEF)
- #define MLD_LOCK_DESTROY() mtx_destroy(&mld_mtx)
- #define MLD_LOCK() mtx_lock(&mld_mtx)
- #define MLD_LOCK_ASSERT() mtx_assert(&mld_mtx, MA_OWNED)
- #define MLD_UNLOCK() mtx_unlock(&mld_mtx)
- #define MLD_UNLOCK_ASSERT() mtx_assert(&mld_mtx, MA_NOTOWNED)
- /*
- * Per-link MLD context.
- */
- #define MLD_IFINFO(ifp) \
- (((struct in6_ifextra *)(ifp)->if_afdata[AF_INET6])->mld_ifinfo)
- struct in6_multi_head;
- int mld_change_state(struct in6_multi *, const int);
- struct mld_ifsoftc *
- mld_domifattach(struct ifnet *);
- void mld_domifdetach(struct ifnet *);
- void mld_fasttimo(void);
- void mld_ifdetach(struct ifnet *, struct in6_multi_head *);
- int mld_input(struct mbuf **, int, int);
- void mld_slowtimo(void);
- #ifdef SYSCTL_DECL
- SYSCTL_DECL(_net_inet6_mld);
- #endif
- #endif /* _KERNEL */
- #endif /* _NETINET6_MLD6_VAR_H_ */
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