1/* $OpenBSD: igmp_var.h,v 1.17 2026/02/26 00:53:18 bluhm Exp $ */
2/* $NetBSD: igmp_var.h,v 1.9 1996/02/13 23:41:31 christos Exp $ */
3
4/*
5 * Copyright (c) 1988 Stephen Deering.
6 * Copyright (c) 1992, 1993
7 * The Regents of the University of California. All rights reserved.
8 *
9 * This code is derived from software contributed to Berkeley by
10 * Stephen Deering of Stanford University.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * @(#)igmp_var.h 8.1 (Berkeley) 7/19/93
37 */
38
39#ifndef _NETINET_IGMP_VAR_H_
40#define _NETINET_IGMP_VAR_H_
41
42/*
43 * Internet Group Management Protocol (IGMP),
44 * implementation-specific definitions.
45 *
46 * Written by Steve Deering, Stanford, May 1988.
47 * Modified by Rosen Sharma, Stanford, Aug 1994.
48 * Modified by Bill Fenner, Xerox PARC, Feb 1995.
49 *
50 * MULTICAST 1.3
51 */
52
53struct igmpstat {
54 u_long igps_rcv_total; /* total IGMP messages received */
55 u_long igps_rcv_tooshort; /* received with too few bytes */
56 u_long igps_rcv_badsum; /* received with bad checksum */
57 u_long igps_rcv_queries; /* received membership queries */
58 u_long igps_rcv_badqueries; /* received invalid queries */
59 u_long igps_rcv_reports; /* received membership reports */
60 u_long igps_rcv_badreports; /* received invalid reports */
61 u_long igps_rcv_ourreports; /* received reports for our groups */
62 u_long igps_snd_reports; /* sent membership reports */
63};
64
65/*
66 * Names for IGMP sysctl objects
67 */
68#define IGMPCTL_STATS 1 /* IGMP statistics */
69#define IGMPCTL_MAXID 2
70
71#define IGMPCTL_NAMES { \
72 { 0, 0 }, \
73 { "stats", CTLTYPE_STRUCT } \
74}
75
76#ifdef _KERNEL
77
78#include <sys/percpu.h>
79
80enum igmpstat_counters {
81 igps_rcv_total, /* total IGMP messages received */
82 igps_rcv_tooshort, /* received with too few bytes */
83 igps_rcv_badsum, /* received with bad checksum */
84 igps_rcv_queries, /* received membership queries */
85 igps_rcv_badqueries, /* received invalid queries */
86 igps_rcv_reports, /* received membership reports */
87 igps_rcv_badreports, /* received invalid reports */
88 igps_rcv_ourreports, /* received reports for our groups */
89 igps_snd_reports, /* sent membership reports */
90 igps_ncounters
91};
92
93extern struct cpumem *igmpcounters;
94
95static inline void
96igmpstat_inc(enum igmpstat_counters c)
97{
98 counters_inc(igmpcounters, c);
99}
100
101/*
102 * Macro to compute a random timer value between 1 and (IGMP_MAX_REPORTING_
103 * DELAY * countdown frequency). We assume that the routine random()
104 * is defined somewhere (and that it returns a positive number).
105 */
106#define IGMP_RANDOM_DELAY(X) (arc4random_uniform(X) + 1)
107
108struct igmp_pktinfo {
109 STAILQ_ENTRY(igmp_pktinfo) ipi_list;
110 struct in_addr ipi_addr;
111 unsigned int ipi_rdomain;
112 unsigned int ipi_ifidx;
113 int ipi_type;
114};
115STAILQ_HEAD(igmp_pktlist, igmp_pktinfo);
116
117void igmp_init(void);
118int igmp_input(struct mbuf **, int *, int, int, struct netstack *);
119void igmp_joingroup(struct in_multi *, struct ifnet *,
120 struct igmp_pktinfo *);
121void igmp_leavegroup(struct in_multi *, struct ifnet *,
122 struct igmp_pktinfo *);
123void igmp_fasttimo(void);
124void igmp_slowtimo(void);
125int igmp_sysctl(int *, u_int, void *, size_t *, void *, size_t);
126void igmp_sendpkt(struct igmp_pktinfo *);
127
128#endif /* _KERNEL */
129
130#endif /* _NETINET_IGMP_VAR_H_ */