| 1 | /* |
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| 2 | * Copyright (c) 1988 Stephen Deering. |
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| 3 | * Copyright (c) 1992, 1993 |
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| 4 | * The Regents of the University of California. All rights reserved. |
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| 5 | * |
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| 6 | * This code is derived from software contributed to Berkeley by |
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| 7 | * Stephen Deering of Stanford University. |
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| 8 | * |
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| 9 | * Redistribution and use in source and binary forms, with or without |
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| 10 | * modification, are permitted provided that the following conditions |
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| 11 | * are met: |
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| 12 | * 1. Redistributions of source code must retain the above copyright |
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| 13 | * notice, this list of conditions and the following disclaimer. |
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| 14 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 15 | * notice, this list of conditions and the following disclaimer in the |
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| 16 | * documentation and/or other materials provided with the distribution. |
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| 17 | * 3. All advertising materials mentioning features or use of this software |
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| 18 | * must display the following acknowledgement: |
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| 19 | * This product includes software developed by the University of |
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| 20 | * California, Berkeley and its contributors. |
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| 21 | * 4. Neither the name of the University nor the names of its contributors |
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| 22 | * may be used to endorse or promote products derived from this software |
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| 23 | * without specific prior written permission. |
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| 24 | * |
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| 25 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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| 26 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 27 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 28 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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| 29 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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| 30 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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| 31 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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| 32 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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| 33 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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| 34 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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| 35 | * SUCH DAMAGE. |
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| 36 | * |
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| 37 | * from: @(#)igmp_var.h 8.1 (Berkeley) 7/19/93 |
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| 38 | * $FreeBSD: src/sys/netinet/igmp_var.h,v 1.19 2002/03/19 21:25:46 alfred Exp $ |
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| 39 | */ |
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| 40 | |
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| 41 | #ifndef _NETINET_IGMP_VAR_H_ |
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| 42 | #define _NETINET_IGMP_VAR_H_ |
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| 43 | |
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| 44 | /* |
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| 45 | * Internet Group Management Protocol (IGMP), |
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| 46 | * implementation-specific definitions. |
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| 47 | * |
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| 48 | * Written by Steve Deering, Stanford, May 1988. |
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| 49 | * |
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| 50 | * MULTICAST Revision: 3.5.1.3 |
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| 51 | */ |
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| 52 | |
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| 53 | struct igmpstat { |
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| 54 | u_int igps_rcv_total; /* total IGMP messages received */ |
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| 55 | u_int igps_rcv_tooshort; /* received with too few bytes */ |
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| 56 | u_int igps_rcv_badsum; /* received with bad checksum */ |
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| 57 | u_int igps_rcv_queries; /* received membership queries */ |
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| 58 | u_int igps_rcv_badqueries; /* received invalid queries */ |
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| 59 | u_int igps_rcv_reports; /* received membership reports */ |
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| 60 | u_int igps_rcv_badreports; /* received invalid reports */ |
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| 61 | u_int igps_rcv_ourreports; /* received reports for our groups */ |
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| 62 | u_int igps_snd_reports; /* sent membership reports */ |
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| 63 | }; |
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| 64 | |
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| 65 | #ifdef _KERNEL |
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| 66 | #define IGMP_RANDOM_DELAY(X) (random() % (X) + 1) |
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| 67 | |
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| 68 | /* |
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| 69 | * States for IGMPv2's leave processing |
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| 70 | */ |
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| 71 | #define IGMP_OTHERMEMBER 0 |
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| 72 | #define IGMP_IREPORTEDLAST 1 |
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| 73 | |
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| 74 | /* |
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| 75 | * We must remember what version the subnet's querier is. |
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| 76 | * We conveniently use the IGMP message type for the proper |
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| 77 | * membership report to keep this state. |
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| 78 | */ |
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| 79 | #define IGMP_V1_ROUTER IGMP_V1_MEMBERSHIP_REPORT |
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| 80 | #define IGMP_V2_ROUTER IGMP_V2_MEMBERSHIP_REPORT |
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| 81 | |
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| 82 | /* |
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| 83 | * Revert to new router if we haven't heard from an old router in |
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| 84 | * this amount of time. |
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| 85 | */ |
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| 86 | #define IGMP_AGE_THRESHOLD 540 |
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| 87 | |
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| 88 | void igmp_init(void); |
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| 89 | void igmp_input(struct mbuf *, int); |
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| 90 | void igmp_joingroup(struct in_multi *); |
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| 91 | void igmp_leavegroup(struct in_multi *); |
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| 92 | void igmp_fasttimo(void); |
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| 93 | void igmp_slowtimo(void); |
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| 94 | |
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| 95 | SYSCTL_DECL(_net_inet_igmp); |
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| 96 | |
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| 97 | #endif |
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| 98 | |
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| 99 | /* |
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| 100 | * Names for IGMP sysctl objects |
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| 101 | */ |
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| 102 | #define IGMPCTL_STATS 1 /* statistics (read-only) */ |
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| 103 | #define IGMPCTL_MAXID 2 |
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| 104 | |
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| 105 | #define IGMPCTL_NAMES { \ |
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| 106 | { 0, 0 }, \ |
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| 107 | { "stats", CTLTYPE_STRUCT }, \ |
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| 108 | } |
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| 109 | #endif |
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