ffd77d9ba5
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
|
|
* Copyright (c) 1988 Stephen Deering.
|
|
* Copyright (c) 1992, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* Stephen Deering of Stanford University.
|
|
*
|
|
* 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.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
|
|
*
|
|
* from: @(#)igmp_var.h 8.1 (Berkeley) 7/19/93
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _NETINET_IGMP_VAR_H_
|
|
#define _NETINET_IGMP_VAR_H_
|
|
|
|
/*
|
|
* Internet Group Management Protocol (IGMP),
|
|
* implementation-specific definitions.
|
|
*
|
|
* Written by Steve Deering, Stanford, May 1988.
|
|
*
|
|
* MULTICAST Revision: 3.5.1.3
|
|
*/
|
|
|
|
struct igmpstat {
|
|
u_int igps_rcv_total; /* total IGMP messages received */
|
|
u_int igps_rcv_tooshort; /* received with too few bytes */
|
|
u_int igps_rcv_badsum; /* received with bad checksum */
|
|
u_int igps_rcv_queries; /* received membership queries */
|
|
u_int igps_rcv_badqueries; /* received invalid queries */
|
|
u_int igps_rcv_reports; /* received membership reports */
|
|
u_int igps_rcv_badreports; /* received invalid reports */
|
|
u_int igps_rcv_ourreports; /* received reports for our groups */
|
|
u_int igps_snd_reports; /* sent membership reports */
|
|
u_int igps_rcv_toolong; /* received with too many bytes */
|
|
};
|
|
|
|
#ifdef _KERNEL
|
|
#define IGMP_RANDOM_DELAY(X) (random() % (X) + 1)
|
|
|
|
/*
|
|
* States for IGMPv2's leave processing
|
|
*/
|
|
#define IGMP_OTHERMEMBER 0
|
|
#define IGMP_IREPORTEDLAST 1
|
|
|
|
/*
|
|
* State masks for IGMPv3
|
|
*/
|
|
#define IGMP_V3_NONEXISTENT 0x01
|
|
#define IGMP_V3_OTHERMEMBER 0x02
|
|
#define IGMP_V3_IREPORTEDLAST 0x04
|
|
|
|
/*
|
|
* We must remember what version the subnet's querier is.
|
|
* We conveniently use the IGMP message type for the proper
|
|
* membership report to keep this state.
|
|
*/
|
|
#define IGMP_V1_ROUTER IGMP_V1_MEMBERSHIP_REPORT
|
|
#define IGMP_V2_ROUTER IGMP_V2_MEMBERSHIP_REPORT
|
|
#define IGMP_V3_ROUTER IGMP_V3_MEMBERSHIP_REPORT
|
|
|
|
/*
|
|
* Revert to new router if we haven't heard from an old router in
|
|
* this amount of time.
|
|
*/
|
|
#define IGMP_AGE_THRESHOLD 540
|
|
|
|
/*
|
|
* IGMPv3 protocol defaults
|
|
*/
|
|
#define IGMP_INIT_ROBVAR 2 /* Robustness */
|
|
#define IGMP_MAX_ROBVAR 7
|
|
#define IGMP_INIT_QRYINT 125 /* Querier's Query interval */
|
|
#define IGMP_MAX_QRYINT 255
|
|
#define IGMP_INIT_QRYRSP 10 /* Query Response interval */
|
|
#define IGMP_DEF_QRYMRT 10
|
|
#define IGMP_UNSOL_INT 1 /* Unsolicited Report interval */
|
|
|
|
/*
|
|
* IGMPv3 report types
|
|
*/
|
|
#define IGMP_REPORT_MODE_IN 1 /* mode-is-include */
|
|
#define IGMP_REPORT_MODE_EX 2 /* mode-is-exclude */
|
|
#define IGMP_REPORT_TO_IN 3 /* change-to-include */
|
|
#define IGMP_REPORT_TO_EX 4 /* change-to-exclude */
|
|
#define IGMP_REPORT_ALLOW_NEW 5 /* allow-new-sources */
|
|
#define IGMP_REPORT_BLOCK_OLD 6 /* block-old-sources */
|
|
|
|
/*
|
|
* Report types
|
|
*/
|
|
#define IGMP_MASK_CUR_STATE 0x01 /* Report current-state */
|
|
#define IGMP_MASK_ALLOW_NEW 0x02 /* Report source as allow-new */
|
|
#define IGMP_MASK_BLOCK_OLD 0x04 /* Report source as block-old */
|
|
#define IGMP_MASK_TO_IN 0x08 /* Report source as to_in */
|
|
#define IGMP_MASK_TO_EX 0x10 /* Report source as to_ex */
|
|
#define IGMP_MASK_STATE_T1 0x20 /* State at T1 */
|
|
#define IGMP_MASK_STATE_T2 0x40 /* State at T2 */
|
|
#define IGMP_MASK_IF_STATE 0x80 /* Report current-state per interface */
|
|
|
|
#define IGMP_MASK_STATE_TX (IGMP_MASK_STATE_T1 | IGMP_MASK_STATE_T2)
|
|
#define IGMP_MASK_PENDING (IGMP_MASK_CUR_STATE | \
|
|
IGMP_MASK_ALLOW_NEW | \
|
|
IGMP_MASK_BLOCK_OLD)
|
|
|
|
/*
|
|
* List identifiers
|
|
*/
|
|
#define IGMP_EXCLUDE_LIST 1 /* exclude list used to tag report */
|
|
#define IGMP_INCLUDE_LIST 2 /* include list used to tag report */
|
|
#define IGMP_RECORDED_LIST 3 /* recorded list used to tag report */
|
|
|
|
void igmp_init(void);
|
|
void igmp_input(struct mbuf *, int);
|
|
void igmp_joingroup(struct in_multi *);
|
|
void igmp_leavegroup(struct in_multi *);
|
|
void igmp_fasttimo(void);
|
|
void igmp_slowtimo(void);
|
|
|
|
SYSCTL_DECL(_net_inet_igmp);
|
|
|
|
#endif
|
|
|
|
/*
|
|
* Names for IGMP sysctl objects
|
|
*/
|
|
#define IGMPCTL_STATS 1 /* statistics (read-only) */
|
|
#define IGMPCTL_MAXID 2
|
|
|
|
#define IGMPCTL_NAMES { \
|
|
{ 0, 0 }, \
|
|
{ "stats", CTLTYPE_STRUCT } \
|
|
}
|
|
#endif
|