7e6cabd06e
Renumber cluase 4 to 3, per what everybody else did when BSD granted them permission to remove clause 3. My insistance on keeping the same numbering for legal reasons is too pedantic, so give up on that point. Submitted by: Jan Schaumann <jschauma@stevens.edu> Pull Request: https://github.com/freebsd/freebsd/pull/96
232 lines
8.5 KiB
C
232 lines
8.5 KiB
C
/*-a
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* Copyright (c) 1988 Stephen Deering.
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Stephen Deering of Stanford University.
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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. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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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* from: @(#)igmp_var.h 8.1 (Berkeley) 7/19/93
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* $FreeBSD$
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*/
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#ifndef _NETINET_IGMP_VAR_H_
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#define _NETINET_IGMP_VAR_H_
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/*
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* Internet Group Management Protocol (IGMP),
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* implementation-specific definitions.
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*
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* Written by Steve Deering, Stanford, May 1988.
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*
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* MULTICAST Revision: 3.5.1.3
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*/
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/*
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* IGMPv3 protocol statistics.
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*/
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struct igmpstat {
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/*
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* Structure header (to insulate ABI changes).
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*/
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uint32_t igps_version; /* version of this structure */
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uint32_t igps_len; /* length of this structure */
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/*
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* Message statistics.
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*/
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uint64_t igps_rcv_total; /* total IGMP messages received */
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uint64_t igps_rcv_tooshort; /* received with too few bytes */
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uint64_t igps_rcv_badttl; /* received with ttl other than 1 */
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uint64_t igps_rcv_badsum; /* received with bad checksum */
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/*
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* Query statistics.
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*/
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uint64_t igps_rcv_v1v2_queries; /* received IGMPv1/IGMPv2 queries */
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uint64_t igps_rcv_v3_queries; /* received IGMPv3 queries */
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uint64_t igps_rcv_badqueries; /* received invalid queries */
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uint64_t igps_rcv_gen_queries; /* received general queries */
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uint64_t igps_rcv_group_queries;/* received group queries */
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uint64_t igps_rcv_gsr_queries; /* received group-source queries */
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uint64_t igps_drop_gsr_queries; /* dropped group-source queries */
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/*
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* Report statistics.
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*/
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uint64_t igps_rcv_reports; /* received membership reports */
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uint64_t igps_rcv_badreports; /* received invalid reports */
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uint64_t igps_rcv_ourreports; /* received reports for our groups */
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uint64_t igps_rcv_nora; /* received w/o Router Alert option */
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uint64_t igps_snd_reports; /* sent membership reports */
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/*
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* Padding for future additions.
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*/
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uint64_t __igps_pad[4];
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};
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#define IGPS_VERSION_3 3 /* as of FreeBSD 8.x */
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#define IGPS_VERSION3_LEN 168
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#ifdef CTASSERT
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CTASSERT(sizeof(struct igmpstat) == IGPS_VERSION3_LEN);
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#endif
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/*
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* Identifiers for IGMP sysctl nodes
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*/
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#define IGMPCTL_STATS 1 /* statistics (read-only) */
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#define IGMP_RANDOM_DELAY(X) (random() % (X) + 1)
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#define IGMP_MAX_STATE_CHANGES 24 /* Max pending changes per group */
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/*
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* IGMP per-group states.
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*/
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#define IGMP_NOT_MEMBER 0 /* Can garbage collect in_multi */
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#define IGMP_SILENT_MEMBER 1 /* Do not perform IGMP for group */
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#define IGMP_REPORTING_MEMBER 2 /* IGMPv1/2/3 we are reporter */
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#define IGMP_IDLE_MEMBER 3 /* IGMPv1/2 we reported last */
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#define IGMP_LAZY_MEMBER 4 /* IGMPv1/2 other member reporting */
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#define IGMP_SLEEPING_MEMBER 5 /* IGMPv1/2 start query response */
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#define IGMP_AWAKENING_MEMBER 6 /* IGMPv1/2 group timer will start */
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#define IGMP_G_QUERY_PENDING_MEMBER 7 /* IGMPv3 group query pending */
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#define IGMP_SG_QUERY_PENDING_MEMBER 8 /* IGMPv3 source query pending */
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#define IGMP_LEAVING_MEMBER 9 /* IGMPv3 dying gasp (pending last */
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/* retransmission of INCLUDE {}) */
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/*
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* IGMP version tag.
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*/
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#define IGMP_VERSION_NONE 0 /* Invalid */
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#define IGMP_VERSION_1 1
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#define IGMP_VERSION_2 2
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#define IGMP_VERSION_3 3 /* Default */
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/*
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* IGMPv3 protocol control variables.
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*/
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#define IGMP_RV_INIT 2 /* Robustness Variable */
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#define IGMP_RV_MIN 1
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#define IGMP_RV_MAX 7
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#define IGMP_QI_INIT 125 /* Query Interval (s) */
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#define IGMP_QI_MIN 1
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#define IGMP_QI_MAX 255
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#define IGMP_QRI_INIT 10 /* Query Response Interval (s) */
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#define IGMP_QRI_MIN 1
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#define IGMP_QRI_MAX 255
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#define IGMP_URI_INIT 3 /* Unsolicited Report Interval (s) */
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#define IGMP_URI_MIN 0
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#define IGMP_URI_MAX 10
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#define IGMP_MAX_G_GS_PACKETS 8 /* # of packets to answer G/GS */
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#define IGMP_MAX_STATE_CHANGE_PACKETS 8 /* # of packets per state change */
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#define IGMP_MAX_RESPONSE_PACKETS 16 /* # of packets for general query */
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#define IGMP_MAX_RESPONSE_BURST 4 /* # of responses to send at once */
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#define IGMP_RESPONSE_BURST_INTERVAL (PR_FASTHZ / 2) /* 500ms */
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/*
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* IGMP-specific mbuf flags.
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*/
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#define M_IGMPV2 M_PROTO1 /* Packet is IGMPv2 */
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#define M_IGMPV3_HDR M_PROTO2 /* Packet has IGMPv3 headers */
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#define M_GROUPREC M_PROTO3 /* mbuf chain is a group record */
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#define M_IGMP_LOOP M_PROTO4 /* transmit on loif, not real ifp */
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/*
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* Default amount of leading space for IGMPv3 to allocate at the
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* beginning of its mbuf packet chains, to avoid fragmentation and
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* unnecessary allocation of leading mbufs.
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*/
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#define RAOPT_LEN 4 /* Length of IP Router Alert option */
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#define IGMP_LEADINGSPACE \
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(sizeof(struct ip) + RAOPT_LEN + sizeof(struct igmp_report))
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/*
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* Structure returned by net.inet.igmp.ifinfo sysctl.
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*/
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struct igmp_ifinfo {
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uint32_t igi_version; /* IGMPv3 Host Compatibility Mode */
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uint32_t igi_v1_timer; /* IGMPv1 Querier Present timer (s) */
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uint32_t igi_v2_timer; /* IGMPv2 Querier Present timer (s) */
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uint32_t igi_v3_timer; /* IGMPv3 General Query (interface) timer (s)*/
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uint32_t igi_flags; /* IGMP per-interface flags */
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#define IGIF_SILENT 0x00000001 /* Do not use IGMP on this ifp */
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#define IGIF_LOOPBACK 0x00000002 /* Send IGMP reports to loopback */
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uint32_t igi_rv; /* IGMPv3 Robustness Variable */
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uint32_t igi_qi; /* IGMPv3 Query Interval (s) */
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uint32_t igi_qri; /* IGMPv3 Query Response Interval (s) */
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uint32_t igi_uri; /* IGMPv3 Unsolicited Report Interval (s) */
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};
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#ifdef _KERNEL
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#define IGMPSTAT_ADD(name, val) V_igmpstat.name += (val)
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#define IGMPSTAT_INC(name) IGMPSTAT_ADD(name, 1)
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/*
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* Subsystem lock macros.
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* The IGMP lock is only taken with IGMP. 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 IGMP_LOCK_INIT() mtx_init(&igmp_mtx, "igmp_mtx", NULL, MTX_DEF)
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#define IGMP_LOCK_DESTROY() mtx_destroy(&igmp_mtx)
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#define IGMP_LOCK() mtx_lock(&igmp_mtx)
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#define IGMP_LOCK_ASSERT() mtx_assert(&igmp_mtx, MA_OWNED)
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#define IGMP_UNLOCK() mtx_unlock(&igmp_mtx)
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#define IGMP_UNLOCK_ASSERT() mtx_assert(&igmp_mtx, MA_NOTOWNED)
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/*
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* Per-interface IGMP router version information.
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*/
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struct igmp_ifsoftc {
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LIST_ENTRY(igmp_ifsoftc) igi_link;
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struct ifnet *igi_ifp; /* pointer back to interface */
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uint32_t igi_version; /* IGMPv3 Host Compatibility Mode */
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uint32_t igi_v1_timer; /* IGMPv1 Querier Present timer (s) */
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uint32_t igi_v2_timer; /* IGMPv2 Querier Present timer (s) */
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uint32_t igi_v3_timer; /* IGMPv3 General Query (interface) timer (s)*/
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uint32_t igi_flags; /* IGMP per-interface flags */
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uint32_t igi_rv; /* IGMPv3 Robustness Variable */
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uint32_t igi_qi; /* IGMPv3 Query Interval (s) */
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uint32_t igi_qri; /* IGMPv3 Query Response Interval (s) */
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uint32_t igi_uri; /* IGMPv3 Unsolicited Report Interval (s) */
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SLIST_HEAD(,in_multi) igi_relinmhead; /* released groups */
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struct mbufq igi_gq; /* general query responses queue */
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};
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int igmp_change_state(struct in_multi *);
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void igmp_fasttimo(void);
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struct igmp_ifsoftc *
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igmp_domifattach(struct ifnet *);
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void igmp_domifdetach(struct ifnet *);
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void igmp_ifdetach(struct ifnet *);
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int igmp_input(struct mbuf **, int *, int);
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void igmp_slowtimo(void);
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SYSCTL_DECL(_net_inet_igmp);
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#endif /* _KERNEL */
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#endif
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