igmp_var.h revision 1.21 
1/*	$NetBSD: igmp_var.h,v 1.21 2004/04/25 16:42:42 simonb Exp $	*/
2
3/*
4 * Copyright (c) 1992, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Stephen Deering of Stanford University.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 *    may be used to endorse or promote products derived from this software
20 *    without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 *	@(#)igmp_var.h	8.1 (Berkeley) 7/19/93
35 */
36
37/*
38 * Copyright (c) 1988 Stephen Deering.
39 *
40 * This code is derived from software contributed to Berkeley by
41 * Stephen Deering of Stanford University.
42 *
43 * Redistribution and use in source and binary forms, with or without
44 * modification, are permitted provided that the following conditions
45 * are met:
46 * 1. Redistributions of source code must retain the above copyright
47 *    notice, this list of conditions and the following disclaimer.
48 * 2. Redistributions in binary form must reproduce the above copyright
49 *    notice, this list of conditions and the following disclaimer in the
50 *    documentation and/or other materials provided with the distribution.
51 * 3. All advertising materials mentioning features or use of this software
52 *    must display the following acknowledgement:
53 *	This product includes software developed by the University of
54 *	California, Berkeley and its contributors.
55 * 4. Neither the name of the University nor the names of its contributors
56 *    may be used to endorse or promote products derived from this software
57 *    without specific prior written permission.
58 *
59 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
60 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
61 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
62 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
63 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
64 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
65 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
69 * SUCH DAMAGE.
70 *
71 *	@(#)igmp_var.h	8.1 (Berkeley) 7/19/93
72 */
73
74#ifndef _NETINET_IGMP_VAR_H_
75#define _NETINET_IGMP_VAR_H_
76
77/*
78 * Internet Group Management Protocol (IGMP),
79 * implementation-specific definitions.
80 *
81 * Written by Steve Deering, Stanford, May 1988.
82 * Modified by Rosen Sharma, Stanford, Aug 1994.
83 * Modified by Bill Fenner, Xerox PARC, Feb 1995.
84 *
85 * MULTICAST 1.3
86 */
87
88struct igmpstat {
89	u_quad_t igps_rcv_total;	/* total IGMP messages received */
90	u_quad_t igps_rcv_tooshort;	/* received with too few bytes */
91	u_quad_t igps_rcv_badsum;	/* received with bad checksum */
92	u_quad_t igps_rcv_queries;	/* received membership queries */
93	u_quad_t igps_rcv_badqueries;	/* received invalid queries */
94	u_quad_t igps_rcv_reports;	/* received membership reports */
95	u_quad_t igps_rcv_badreports;	/* received invalid reports */
96	u_quad_t igps_rcv_ourreports;	/* received reports for our groups */
97	u_quad_t igps_snd_reports;	/* sent membership reports */
98};
99
100#ifdef _KERNEL
101extern	struct igmpstat igmpstat;
102
103/*
104 * Macro to compute a random timer value between 1 and (IGMP_MAX_REPORTING_
105 * DELAY * countdown frequency).  We assume that the routine random()
106 * is defined somewhere (and that it returns a positive number).
107 */
108#define	IGMP_RANDOM_DELAY(X)	(random() % (X) + 1)
109
110#ifdef __NO_STRICT_ALIGNMENT
111#define	IGMP_HDR_ALIGNED_P(ig)	1
112#else
113#define	IGMP_HDR_ALIGNED_P(ig)	((((vaddr_t) (ig)) & 3) == 0)
114#endif
115
116void	igmp_input(struct mbuf *, ...);
117int	igmp_joingroup(struct in_multi *);
118void	igmp_leavegroup(struct in_multi *);
119void	igmp_fasttimo(void);
120void	igmp_slowtimo(void);
121void	igmp_purgeif(struct ifnet *);
122#endif
123
124#endif /* _NETINET_IGMP_VAR_H_ */
125