freebsd-dev/sys/netinet/igmp_var.h

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/*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 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
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* $FreeBSD$
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*/
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#ifndef _NETINET_IGMP_VAR_H_
#define _NETINET_IGMP_VAR_H_
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/*
* Internet Group Management Protocol (IGMP),
* implementation-specific definitions.
*
* Written by Steve Deering, Stanford, May 1988.
*
* MULTICAST Revision: 3.5.1.3
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*/
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 */
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};
#ifdef _KERNEL
Initial get-the-easy-case-working upgrade of the multicast code to something more recent than the ancient 1.2 release contained in 4.4. This code has the following advantages as compared to previous versions (culled from the README file for the SunOS release): - True multicast delivery - Configurable rate-limiting of forwarded multicast traffic on each physical interface or tunnel, using a token-bucket limiter. - Simplistic classification of packets for prioritized dropping. - Administrative scoping of multicast address ranges. - Faster detection of hosts leaving groups. - Support for multicast traceroute (code not yet available). - Support for RSVP, the Resource Reservation Protocol. What still needs to be done: - The multicast forwarder needs testing. - The multicast routing daemon needs to be ported. - Network interface drivers need to have the `#ifdef MULTICAST' goop ripped out of them. - The IGMP code should probably be bogon-tested. Some notes about the porting process: In some cases, the Berkeley people decided to incorporate functionality from later releases of the multicast code, but then had to do things differently. As a result, if you look at Deering's patches, and then look at our code, it is not always obvious whether the patch even applies. Let the reader beware. I ran ip_mroute.c through several passes of `unifdef' to get rid of useless grot, and to permanently enable the RSVP support, which we will include as standard. Ported by: Garrett Wollman Submitted by: Steve Deering and Ajit Thyagarajan (among others)
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#define IGMP_RANDOM_DELAY(X) (random() % (X) + 1)
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/*
* States for IGMPv2's leave processing
*/
#define IGMP_OTHERMEMBER 0
#define IGMP_IREPORTEDLAST 1
/*
* 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
/*
* Revert to new router if we haven't heard from an old router in
* this amount of time.
*/
#define IGMP_AGE_THRESHOLD 540
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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);
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#endif
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/*
* Names for IGMP sysctl objects
*/
#define IGMPCTL_STATS 1 /* statistics (read-only) */
#define IGMPCTL_MAXID 2
#define IGMPCTL_NAMES { \
{ 0, 0 }, \
{ "stats", CTLTYPE_STRUCT }, \
}
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#endif