71498f308b
and protocol-independent host mode multicast. The code is written to accomodate IPv6, IGMPv3 and MLDv2 with only a little additional work. This change only pertains to FreeBSD's use as a multicast end-station and does not concern multicast routing; for an IGMPv3/MLDv2 router implementation, consider the XORP project. The work is based on Wilbert de Graaf's IGMPv3 code drop for FreeBSD 4.6, which is available at: http://www.kloosterhof.com/wilbert/igmpv3.html Summary * IPv4 multicast socket processing is now moved out of ip_output.c into a new module, in_mcast.c. * The in_mcast.c module implements the IPv4 legacy any-source API in terms of the protocol-independent source-specific API. * Source filters are lazy allocated as the common case does not use them. They are part of per inpcb state and are covered by the inpcb lock. * struct ip_mreqn is now supported to allow applications to specify multicast joins by interface index in the legacy IPv4 any-source API. * In UDP, an incoming multicast datagram only requires that the source port matches the 4-tuple if the socket was already bound by source port. An unbound socket SHOULD be able to receive multicasts sent from an ephemeral source port. * The UDP socket multicast filter mode defaults to exclusive, that is, sources present in the per-socket list will be blocked from delivery. * The RFC 3678 userland functions have been added to libc: setsourcefilter, getsourcefilter, setipv4sourcefilter, getipv4sourcefilter. * Definitions for IGMPv3 are merged but not yet used. * struct sockaddr_storage is now referenced from <netinet/in.h>. It is therefore defined there if not already declared in the same way as for the C99 types. * The RFC 1724 hack (specify 0.0.0.0/8 addresses to IP_MULTICAST_IF which are then interpreted as interface indexes) is now deprecated. * A patch for the Rhyolite.com routed in the FreeBSD base system is available in the -net archives. This only affects individuals running RIPv1 or RIPv2 via point-to-point and/or unnumbered interfaces. * Make IPv6 detach path similar to IPv4's in code flow; functionally same. * Bump __FreeBSD_version to 700048; see UPDATING. This work was financially supported by another FreeBSD committer. Obtained from: p4://bms_netdev Submitted by: Wilbert de Graaf (original work) Reviewed by: rwatson (locking), silence from fenner, net@ (but with encouragement)
160 lines
5.3 KiB
C
160 lines
5.3 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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* 4. 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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struct igmpstat {
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u_int igps_rcv_total; /* total IGMP messages received */
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u_int igps_rcv_tooshort; /* received with too few bytes */
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u_int igps_rcv_badsum; /* received with bad checksum */
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u_int igps_rcv_queries; /* received membership queries */
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u_int igps_rcv_badqueries; /* received invalid queries */
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u_int igps_rcv_reports; /* received membership reports */
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u_int igps_rcv_badreports; /* received invalid reports */
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u_int igps_rcv_ourreports; /* received reports for our groups */
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u_int igps_snd_reports; /* sent membership reports */
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u_int igps_rcv_toolong; /* received with too many bytes */
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};
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#ifdef _KERNEL
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#define IGMP_RANDOM_DELAY(X) (random() % (X) + 1)
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/*
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* States for IGMPv2's leave processing
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*/
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#define IGMP_OTHERMEMBER 0
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#define IGMP_IREPORTEDLAST 1
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/*
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* State masks for IGMPv3
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*/
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#define IGMP_V3_NONEXISTENT 0x01
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#define IGMP_V3_OTHERMEMBER 0x02
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#define IGMP_V3_IREPORTEDLAST 0x04
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/*
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* We must remember what version the subnet's querier is.
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* We conveniently use the IGMP message type for the proper
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* membership report to keep this state.
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*/
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#define IGMP_V1_ROUTER IGMP_V1_MEMBERSHIP_REPORT
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#define IGMP_V2_ROUTER IGMP_V2_MEMBERSHIP_REPORT
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#define IGMP_V3_ROUTER IGMP_V3_MEMBERSHIP_REPORT
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/*
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* Revert to new router if we haven't heard from an old router in
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* this amount of time.
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*/
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#define IGMP_AGE_THRESHOLD 540
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/*
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* IGMPv3 protocol defaults
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*/
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#define IGMP_INIT_ROBVAR 2 /* Robustness */
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#define IGMP_MAX_ROBVAR 7
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#define IGMP_INIT_QRYINT 125 /* Querier's Query interval */
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#define IGMP_MAX_QRYINT 255
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#define IGMP_INIT_QRYRSP 10 /* Query Response interval */
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#define IGMP_DEF_QRYMRT 10
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#define IGMP_UNSOL_INT 1 /* Unsolicited Report interval */
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/*
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* IGMPv3 report types
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*/
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#define IGMP_REPORT_MODE_IN 1 /* mode-is-include */
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#define IGMP_REPORT_MODE_EX 2 /* mode-is-exclude */
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#define IGMP_REPORT_TO_IN 3 /* change-to-include */
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#define IGMP_REPORT_TO_EX 4 /* change-to-exclude */
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#define IGMP_REPORT_ALLOW_NEW 5 /* allow-new-sources */
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#define IGMP_REPORT_BLOCK_OLD 6 /* block-old-sources */
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/*
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* Report types
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*/
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#define IGMP_MASK_CUR_STATE 0x01 /* Report current-state */
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#define IGMP_MASK_ALLOW_NEW 0x02 /* Report source as allow-new */
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#define IGMP_MASK_BLOCK_OLD 0x04 /* Report source as block-old */
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#define IGMP_MASK_TO_IN 0x08 /* Report source as to_in */
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#define IGMP_MASK_TO_EX 0x10 /* Report source as to_ex */
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#define IGMP_MASK_STATE_T1 0x20 /* State at T1 */
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#define IGMP_MASK_STATE_T2 0x40 /* State at T2 */
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#define IGMP_MASK_IF_STATE 0x80 /* Report current-state per interface */
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#define IGMP_MASK_STATE_TX (IGMP_MASK_STATE_T1 | IGMP_MASK_STATE_T2)
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#define IGMP_MASK_PENDING (IGMP_MASK_CUR_STATE | \
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IGMP_MASK_ALLOW_NEW | \
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IGMP_MASK_BLOCK_OLD)
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/*
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* List identifiers
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*/
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#define IGMP_EXCLUDE_LIST 1 /* exclude list used to tag report */
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#define IGMP_INCLUDE_LIST 2 /* include list used to tag report */
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#define IGMP_RECORDED_LIST 3 /* recorded list used to tag report */
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void igmp_init(void);
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void igmp_input(struct mbuf *, int);
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void igmp_joingroup(struct in_multi *);
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void igmp_leavegroup(struct in_multi *);
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void igmp_fasttimo(void);
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void igmp_slowtimo(void);
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SYSCTL_DECL(_net_inet_igmp);
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#endif
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/*
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* Names for IGMP sysctl objects
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*/
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#define IGMPCTL_STATS 1 /* statistics (read-only) */
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#define IGMPCTL_MAXID 2
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#define IGMPCTL_NAMES { \
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{ 0, 0 }, \
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{ "stats", CTLTYPE_STRUCT } \
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}
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#endif
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