igmp_var.h revision 44511 
1/*
2 * Copyright (c) 1988 Stephen Deering.
3 * Copyright (c) 1992, 1993
4 *	The Regents of the University of California.  All rights reserved.
5 *
6 * This code is derived from software contributed to Berkeley by
7 * Stephen Deering of Stanford University.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 *    must display the following acknowledgement:
19 *	This product includes software developed by the University of
20 *	California, Berkeley and its contributors.
21 * 4. Neither the name of the University nor the names of its contributors
22 *    may be used to endorse or promote products derived from this software
23 *    without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 *	from: @(#)igmp_var.h	8.1 (Berkeley) 7/19/93
38 *	$Id: igmp_var.h,v 1.13 1999/02/16 10:49:51 dfr Exp $
39 */
40
41#ifndef _NETINET_IGMP_VAR_H_
42#define _NETINET_IGMP_VAR_H_
43
44/*
45 * Internet Group Management Protocol (IGMP),
46 * implementation-specific definitions.
47 *
48 * Written by Steve Deering, Stanford, May 1988.
49 *
50 * MULTICAST Revision: 3.5.1.3
51 */
52
53struct igmpstat {
54	u_int	igps_rcv_total;		/* total IGMP messages received */
55	u_int	igps_rcv_tooshort;	/* received with too few bytes */
56	u_int	igps_rcv_badsum;	/* received with bad checksum */
57	u_int	igps_rcv_queries;	/* received membership queries */
58	u_int	igps_rcv_badqueries;	/* received invalid queries */
59	u_int	igps_rcv_reports;	/* received membership reports */
60	u_int	igps_rcv_badreports;	/* received invalid reports */
61	u_int	igps_rcv_ourreports;	/* received reports for our groups */
62	u_int	igps_snd_reports;	/* sent membership reports */
63};
64
65#ifdef KERNEL
66#define IGMP_RANDOM_DELAY(X) (random() % (X) + 1)
67
68/*
69 * States for IGMPv2's leave processing
70 */
71#define IGMP_OTHERMEMBER			0
72#define IGMP_IREPORTEDLAST			1
73
74/*
75 * We must remember what version the subnet's querier is.
76 * We conveniently use the IGMP message type for the proper
77 * membership report to keep this state.
78 */
79#define IGMP_V1_ROUTER				IGMP_V1_MEMBERSHIP_REPORT
80#define IGMP_V2_ROUTER				IGMP_V2_MEMBERSHIP_REPORT
81
82/*
83 * Revert to new router if we haven't heard from an old router in
84 * this amount of time.
85 */
86#define IGMP_AGE_THRESHOLD			540
87
88void	igmp_init __P((void));
89void	igmp_input __P((struct mbuf *, int));
90void	igmp_joingroup __P((struct in_multi *));
91void	igmp_leavegroup __P((struct in_multi *));
92void	igmp_fasttimo __P((void));
93void	igmp_slowtimo __P((void));
94
95SYSCTL_DECL(_net_inet_igmp);
96
97#endif
98
99/*
100 * Names for IGMP sysctl objects
101 */
102#define IGMPCTL_STATS		1	/* statistics (read-only) */
103#define IGMPCTL_MAXID		2
104
105#define IGMPCTL_NAMES { \
106	{ 0, 0 }, \
107	{ "stats", CTLTYPE_STRUCT }, \
108}
109#endif
110