2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1988 Stephen Deering.
5 * Copyright (c) 1992, 1993
6 * The Regents of the University of California. All rights reserved.
8 * This code is derived from software contributed to Berkeley by
9 * Stephen Deering of Stanford University.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * from: @(#)igmp_var.h 8.1 (Berkeley) 7/19/93
39 #ifndef _NETINET_IGMP_VAR_H_
40 #define _NETINET_IGMP_VAR_H_
43 * Internet Group Management Protocol (IGMP),
44 * implementation-specific definitions.
46 * Written by Steve Deering, Stanford, May 1988.
48 * MULTICAST Revision: 3.5.1.3
52 * IGMPv3 protocol statistics.
56 * Structure header (to insulate ABI changes).
58 uint32_t igps_version; /* version of this structure */
59 uint32_t igps_len; /* length of this structure */
63 uint64_t igps_rcv_total; /* total IGMP messages received */
64 uint64_t igps_rcv_tooshort; /* received with too few bytes */
65 uint64_t igps_rcv_badttl; /* received with ttl other than 1 */
66 uint64_t igps_rcv_badsum; /* received with bad checksum */
70 uint64_t igps_rcv_v1v2_queries; /* received IGMPv1/IGMPv2 queries */
71 uint64_t igps_rcv_v3_queries; /* received IGMPv3 queries */
72 uint64_t igps_rcv_badqueries; /* received invalid queries */
73 uint64_t igps_rcv_gen_queries; /* received general queries */
74 uint64_t igps_rcv_group_queries;/* received group queries */
75 uint64_t igps_rcv_gsr_queries; /* received group-source queries */
76 uint64_t igps_drop_gsr_queries; /* dropped group-source queries */
80 uint64_t igps_rcv_reports; /* received membership reports */
81 uint64_t igps_rcv_badreports; /* received invalid reports */
82 uint64_t igps_rcv_ourreports; /* received reports for our groups */
83 uint64_t igps_rcv_nora; /* received w/o Router Alert option */
84 uint64_t igps_snd_reports; /* sent membership reports */
86 * Padding for future additions.
88 uint64_t __igps_pad[4];
90 #define IGPS_VERSION_3 3 /* as of FreeBSD 8.x */
91 #define IGPS_VERSION3_LEN 168
93 CTASSERT(sizeof(struct igmpstat) == IGPS_VERSION3_LEN);
97 * Identifiers for IGMP sysctl nodes
99 #define IGMPCTL_STATS 1 /* statistics (read-only) */
101 #define IGMP_RANDOM_DELAY(X) (random() % (X) + 1)
102 #define IGMP_MAX_STATE_CHANGES 24 /* Max pending changes per group */
105 * IGMP per-group states.
107 #define IGMP_NOT_MEMBER 0 /* Can garbage collect in_multi */
108 #define IGMP_SILENT_MEMBER 1 /* Do not perform IGMP for group */
109 #define IGMP_REPORTING_MEMBER 2 /* IGMPv1/2/3 we are reporter */
110 #define IGMP_IDLE_MEMBER 3 /* IGMPv1/2 we reported last */
111 #define IGMP_LAZY_MEMBER 4 /* IGMPv1/2 other member reporting */
112 #define IGMP_SLEEPING_MEMBER 5 /* IGMPv1/2 start query response */
113 #define IGMP_AWAKENING_MEMBER 6 /* IGMPv1/2 group timer will start */
114 #define IGMP_G_QUERY_PENDING_MEMBER 7 /* IGMPv3 group query pending */
115 #define IGMP_SG_QUERY_PENDING_MEMBER 8 /* IGMPv3 source query pending */
116 #define IGMP_LEAVING_MEMBER 9 /* IGMPv3 dying gasp (pending last */
117 /* retransmission of INCLUDE {}) */
122 #define IGMP_VERSION_NONE 0 /* Invalid */
123 #define IGMP_VERSION_1 1
124 #define IGMP_VERSION_2 2
125 #define IGMP_VERSION_3 3 /* Default */
128 * IGMPv3 protocol control variables.
130 #define IGMP_RV_INIT 2 /* Robustness Variable */
131 #define IGMP_RV_MIN 1
132 #define IGMP_RV_MAX 7
134 #define IGMP_QI_INIT 125 /* Query Interval (s) */
135 #define IGMP_QI_MIN 1
136 #define IGMP_QI_MAX 255
138 #define IGMP_QRI_INIT 10 /* Query Response Interval (s) */
139 #define IGMP_QRI_MIN 1
140 #define IGMP_QRI_MAX 255
142 #define IGMP_URI_INIT 3 /* Unsolicited Report Interval (s) */
143 #define IGMP_URI_MIN 0
144 #define IGMP_URI_MAX 10
146 #define IGMP_MAX_G_GS_PACKETS 8 /* # of packets to answer G/GS */
147 #define IGMP_MAX_STATE_CHANGE_PACKETS 8 /* # of packets per state change */
148 #define IGMP_MAX_RESPONSE_PACKETS 16 /* # of packets for general query */
149 #define IGMP_MAX_RESPONSE_BURST 4 /* # of responses to send at once */
150 #define IGMP_RESPONSE_BURST_INTERVAL (PR_FASTHZ / 2) /* 500ms */
153 * IGMP-specific mbuf flags.
155 #define M_IGMPV2 M_PROTO1 /* Packet is IGMPv2 */
156 #define M_IGMPV3_HDR M_PROTO2 /* Packet has IGMPv3 headers */
157 #define M_GROUPREC M_PROTO3 /* mbuf chain is a group record */
158 #define M_IGMP_LOOP M_PROTO4 /* transmit on loif, not real ifp */
161 * Default amount of leading space for IGMPv3 to allocate at the
162 * beginning of its mbuf packet chains, to avoid fragmentation and
163 * unnecessary allocation of leading mbufs.
165 #define RAOPT_LEN 4 /* Length of IP Router Alert option */
166 #define IGMP_LEADINGSPACE \
167 (sizeof(struct ip) + RAOPT_LEN + sizeof(struct igmp_report))
170 * Structure returned by net.inet.igmp.ifinfo sysctl.
173 uint32_t igi_version; /* IGMPv3 Host Compatibility Mode */
174 uint32_t igi_v1_timer; /* IGMPv1 Querier Present timer (s) */
175 uint32_t igi_v2_timer; /* IGMPv2 Querier Present timer (s) */
176 uint32_t igi_v3_timer; /* IGMPv3 General Query (interface) timer (s)*/
177 uint32_t igi_flags; /* IGMP per-interface flags */
178 #define IGIF_SILENT 0x00000001 /* Do not use IGMP on this ifp */
179 #define IGIF_LOOPBACK 0x00000002 /* Send IGMP reports to loopback */
180 uint32_t igi_rv; /* IGMPv3 Robustness Variable */
181 uint32_t igi_qi; /* IGMPv3 Query Interval (s) */
182 uint32_t igi_qri; /* IGMPv3 Query Response Interval (s) */
183 uint32_t igi_uri; /* IGMPv3 Unsolicited Report Interval (s) */
187 #define IGMPSTAT_ADD(name, val) V_igmpstat.name += (val)
188 #define IGMPSTAT_INC(name) IGMPSTAT_ADD(name, 1)
191 * Subsystem lock macros.
192 * The IGMP lock is only taken with IGMP. Currently it is system-wide.
193 * VIMAGE: The lock could be pushed to per-VIMAGE granularity in future.
195 #define IGMP_LOCK_INIT() mtx_init(&igmp_mtx, "igmp_mtx", NULL, MTX_DEF)
196 #define IGMP_LOCK_DESTROY() mtx_destroy(&igmp_mtx)
197 #define IGMP_LOCK() mtx_lock(&igmp_mtx)
198 #define IGMP_LOCK_ASSERT() mtx_assert(&igmp_mtx, MA_OWNED)
199 #define IGMP_UNLOCK() mtx_unlock(&igmp_mtx)
200 #define IGMP_UNLOCK_ASSERT() mtx_assert(&igmp_mtx, MA_NOTOWNED)
203 * Per-interface IGMP router version information.
205 struct igmp_ifsoftc {
206 LIST_ENTRY(igmp_ifsoftc) igi_link;
207 struct ifnet *igi_ifp; /* pointer back to interface */
208 uint32_t igi_version; /* IGMPv3 Host Compatibility Mode */
209 uint32_t igi_v1_timer; /* IGMPv1 Querier Present timer (s) */
210 uint32_t igi_v2_timer; /* IGMPv2 Querier Present timer (s) */
211 uint32_t igi_v3_timer; /* IGMPv3 General Query (interface) timer (s)*/
212 uint32_t igi_flags; /* IGMP per-interface flags */
213 uint32_t igi_rv; /* IGMPv3 Robustness Variable */
214 uint32_t igi_qi; /* IGMPv3 Query Interval (s) */
215 uint32_t igi_qri; /* IGMPv3 Query Response Interval (s) */
216 uint32_t igi_uri; /* IGMPv3 Unsolicited Report Interval (s) */
217 struct mbufq igi_gq; /* general query responses queue */
220 int igmp_change_state(struct in_multi *);
221 void igmp_fasttimo(void);
222 struct igmp_ifsoftc *
223 igmp_domifattach(struct ifnet *);
224 void igmp_domifdetach(struct ifnet *);
225 void igmp_ifdetach(struct ifnet *);
226 int igmp_input(struct mbuf **, int *, int);
227 void igmp_slowtimo(void);
229 SYSCTL_DECL(_net_inet_igmp);