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33cde13046
import from p4 bms_netdev. Summary of changes: * Connect netinet6/in6_mcast.c to build. The legacy KAME KPIs are mostly preserved. * Eliminate now dead code from ip6_output.c. Don't do mbuf bingo, we are not going to do RFC 2292 style CMSG tricks for multicast options as they are not required by any current IPv6 normative reference. * Refactor transports (UDP, raw_ip6) to do own mcast filtering. SCTP, TCP unaffected by this change. * Add ip6_msource, in6_msource structs to in6_var.h. * Hookup mld_ifinfo state to in6_ifextra, allocate from domifattach path. * Eliminate IN6_LOOKUP_MULTI(), it is no longer referenced. Kernel consumers which need this should use in6m_lookup(). * Refactor IPv6 socket group memberships to use a vector (like IPv4). * Update ifmcstat(8) for IPv6 SSM. * Add witness lock order for IN6_MULTI_LOCK. * Move IN6_MULTI_LOCK out of lower ip6_output()/ip6_input() paths. * Introduce IP6STAT_ADD/SUB/INC/DEC as per rwatson's IPv4 cleanup. * Update carp(4) for new IPv6 SSM KPIs. * Virtualize ip6_mrouter socket. Changes mostly localized to IPv6 MROUTING. * Don't do a local group lookup in MROUTING. * Kill unused KAME prototypes in6_purgemkludge(), in6_restoremkludge(). * Preserve KAME DAD timer jitter behaviour in MLDv1 compatibility mode. * Bump __FreeBSD_version to 800084. * Update UPDATING. NOTE WELL: * This code hasn't been tested against real MLDv2 queriers (yet), although the on-wire protocol has been verified in Wireshark. * There are a few unresolved issues in the socket layer APIs to do with scope ID propagation. * There is a LOR present in ip6_output()'s use of in6_setscope() which needs to be resolved. See comments in mld6.c. This is believed to be benign and can't be avoided for the moment without re-introducing an indirect netisr. This work was mostly derived from the IGMPv3 implementation, and has been sponsored by a third party.
164 lines
5.9 KiB
C
164 lines
5.9 KiB
C
/*-
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* Copyright (c) 2009 Bruce Simpson.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _NETINET6_MLD6_VAR_H_
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#define _NETINET6_MLD6_VAR_H_
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/*
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* Multicast Listener Discovery (MLD)
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* implementation-specific definitions.
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*/
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#ifdef _KERNEL
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/*
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* Per-link MLD state.
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*/
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struct mld_ifinfo {
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LIST_ENTRY(mld_ifinfo) mli_link;
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struct ifnet *mli_ifp; /* interface this instance belongs to */
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uint32_t mli_version; /* MLDv1 Host Compatibility Mode */
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uint32_t mli_v1_timer; /* MLDv1 Querier Present timer (s) */
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uint32_t mli_v2_timer; /* MLDv2 General Query (interface) timer (s)*/
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uint32_t mli_flags; /* MLD per-interface flags */
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uint32_t mli_rv; /* MLDv2 Robustness Variable */
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uint32_t mli_qi; /* MLDv2 Query Interval (s) */
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uint32_t mli_qri; /* MLDv2 Query Response Interval (s) */
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uint32_t mli_uri; /* MLDv2 Unsolicited Report Interval (s) */
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SLIST_HEAD(,in6_multi) mli_relinmhead; /* released groups */
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struct ifqueue mli_gq; /* queue of general query responses */
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};
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#define MLIF_SILENT 0x00000001 /* Do not use MLD on this ifp */
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#define MLD_RANDOM_DELAY(X) (arc4random() % (X) + 1)
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#define MLD_MAX_STATE_CHANGES 24 /* Max pending changes per group */
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/*
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* MLD per-group states.
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*/
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#define MLD_NOT_MEMBER 0 /* Can garbage collect group */
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#define MLD_SILENT_MEMBER 1 /* Do not perform MLD for group */
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#define MLD_REPORTING_MEMBER 2 /* MLDv1 we are reporter */
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#define MLD_IDLE_MEMBER 3 /* MLDv1 we reported last */
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#define MLD_LAZY_MEMBER 4 /* MLDv1 other member reporting */
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#define MLD_SLEEPING_MEMBER 5 /* MLDv1 start query response */
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#define MLD_AWAKENING_MEMBER 6 /* MLDv1 group timer will start */
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#define MLD_G_QUERY_PENDING_MEMBER 7 /* MLDv2 group query pending */
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#define MLD_SG_QUERY_PENDING_MEMBER 8 /* MLDv2 source query pending */
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#define MLD_LEAVING_MEMBER 9 /* MLDv2 dying gasp (pending last */
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/* retransmission of INCLUDE {}) */
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/*
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* MLD version tag.
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*/
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#define MLD_VERSION_NONE 0 /* Invalid */
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#define MLD_VERSION_1 1
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#define MLD_VERSION_2 2 /* Default */
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/*
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* MLDv2 protocol control variables.
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*/
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#define MLD_RV_INIT 2 /* Robustness Variable */
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#define MLD_RV_MIN 1
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#define MLD_RV_MAX 7
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#define MLD_QI_INIT 125 /* Query Interval (s) */
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#define MLD_QI_MIN 1
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#define MLD_QI_MAX 255
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#define MLD_QRI_INIT 10 /* Query Response Interval (s) */
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#define MLD_QRI_MIN 1
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#define MLD_QRI_MAX 255
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#define MLD_URI_INIT 3 /* Unsolicited Report Interval (s) */
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#define MLD_URI_MIN 0
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#define MLD_URI_MAX 10
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#define MLD_MAX_GS_SOURCES 256 /* # of sources in rx GS query */
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#define MLD_MAX_G_GS_PACKETS 8 /* # of packets to answer G/GS */
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#define MLD_MAX_STATE_CHANGE_PACKETS 8 /* # of packets per state change */
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#define MLD_MAX_RESPONSE_PACKETS 16 /* # of packets for general query */
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#define MLD_MAX_RESPONSE_BURST 4 /* # of responses to send at once */
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#define MLD_RESPONSE_BURST_INTERVAL (PR_FASTHZ / 2) /* 500ms */
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/*
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* MLD-specific mbuf flags.
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*/
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#define M_MLDV1 M_PROTO1 /* Packet is MLDv1 */
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#define M_GROUPREC M_PROTO3 /* mbuf chain is a group record */
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/*
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* Leading space for MLDv2 reports inside MTU.
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*
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* NOTE: This differs from IGMPv3 significantly. KAME IPv6 requires
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* that a fully formed mbuf chain *without* the Router Alert option
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* is passed to ip6_output(), however we must account for it in the
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* MTU if we need to split an MLDv2 report into several packets.
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*
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* We now put the MLDv2 report header in the initial mbuf containing
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* the IPv6 header.
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*/
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#define MLD_MTUSPACE (sizeof(struct ip6_hdr) + sizeof(struct mld_raopt) + \
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sizeof(struct icmp6_hdr))
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/*
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* Subsystem lock macros.
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* The MLD lock is only taken with MLD. Currently it is system-wide.
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* VIMAGE: The lock could be pushed to per-VIMAGE granularity in future.
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*/
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#define MLD_LOCK_INIT() mtx_init(&mld_mtx, "mld_mtx", NULL, MTX_DEF)
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#define MLD_LOCK_DESTROY() mtx_destroy(&mld_mtx)
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#define MLD_LOCK() mtx_lock(&mld_mtx)
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#define MLD_LOCK_ASSERT() mtx_assert(&mld_mtx, MA_OWNED)
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#define MLD_UNLOCK() mtx_unlock(&mld_mtx)
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#define MLD_UNLOCK_ASSERT() mtx_assert(&mld_mtx, MA_NOTOWNED)
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/*
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* Per-link MLD context.
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*/
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#define MLD_IFINFO(ifp) \
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(((struct in6_ifextra *)(ifp)->if_afdata[AF_INET6])->mld_ifinfo)
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int mld_change_state(struct in6_multi *, const int);
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struct mld_ifinfo *
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mld_domifattach(struct ifnet *);
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void mld_domifdetach(struct ifnet *);
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void mld_fasttimo(void);
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void mld_ifdetach(struct ifnet *);
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int mld_input(struct mbuf *, int, int);
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void mld_slowtimo(void);
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#ifdef SYSCTL_DECL
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SYSCTL_DECL(_net_inet6_mld);
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#endif
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#endif /* _KERNEL */
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#endif /* _NETINET6_MLD6_VAR_H_ */
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