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 * $FreeBSD: releng/5.2/sys/netinet/igmp_var.h 92723 2002-03-19 21:25:46Z alfred $
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
53 struct 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
88 void igmp_init(void);
89 void igmp_input(struct mbuf *, int);
90 void igmp_joingroup(struct in_multi *);
91 void igmp_leavegroup(struct in_multi *);
92 void igmp_fasttimo(void);
93 void igmp_slowtimo(void);
94
95 SYSCTL_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
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