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. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * from: @(#)igmp_var.h 8.1 (Berkeley) 7/19/93 34 * $FreeBSD: src/sys/netinet/igmp_var.h,v 1.17 1999/12/29 04:40:59 peter Exp $ 35 * $DragonFly: src/sys/netinet/igmp_var.h,v 1.6 2006/09/03 18:52:29 dillon Exp $ 36 */ 37 38 #ifndef _NETINET_IGMP_VAR_H_ 39 #define _NETINET_IGMP_VAR_H_ 40 41 #ifndef _SYS_TYPES_H_ 42 #include <sys/types.h> 43 #endif 44 45 #ifdef _KERNEL 46 47 #ifndef _SYS_SYSCTL_H_ 48 #include <sys/sysctl.h> 49 #endif 50 51 #endif 52 53 /* 54 * Internet Group Management Protocol (IGMP), 55 * implementation-specific definitions. 56 * 57 * Written by Steve Deering, Stanford, May 1988. 58 * 59 * MULTICAST Revision: 3.5.1.3 60 */ 61 62 struct igmpstat { 63 u_int igps_rcv_total; /* total IGMP messages received */ 64 u_int igps_rcv_tooshort; /* received with too few bytes */ 65 u_int igps_rcv_badsum; /* received with bad checksum */ 66 u_int igps_rcv_queries; /* received membership queries */ 67 u_int igps_rcv_badqueries; /* received invalid queries */ 68 u_int igps_rcv_reports; /* received membership reports */ 69 u_int igps_rcv_badreports; /* received invalid reports */ 70 u_int igps_rcv_ourreports; /* received reports for our groups */ 71 u_int igps_snd_reports; /* sent membership reports */ 72 }; 73 74 #ifdef _KERNEL 75 #define IGMP_RANDOM_DELAY(X) (krandom() % (X) + 1) 76 77 /* 78 * States for IGMPv2's leave processing 79 */ 80 #define IGMP_OTHERMEMBER 0 81 #define IGMP_IREPORTEDLAST 1 82 83 /* 84 * We must remember what version the subnet's querier is. 85 * We conveniently use the IGMP message type for the proper 86 * membership report to keep this state. 87 */ 88 #define IGMP_V1_ROUTER IGMP_V1_MEMBERSHIP_REPORT 89 #define IGMP_V2_ROUTER IGMP_V2_MEMBERSHIP_REPORT 90 91 /* 92 * Revert to new router if we haven't heard from an old router in 93 * this amount of time. 94 */ 95 #define IGMP_AGE_THRESHOLD 540 96 97 struct mbuf; 98 struct in_multi; 99 100 void igmp_init (void); 101 int igmp_input (struct mbuf **, int *, int); 102 void igmp_joingroup (struct in_multi *); 103 void igmp_leavegroup (struct in_multi *); 104 105 SYSCTL_DECL(_net_inet_igmp); 106 107 #endif 108 109 /* 110 * Names for IGMP sysctl objects 111 */ 112 #define IGMPCTL_STATS 1 /* statistics (read-only) */ 113 #define IGMPCTL_MAXID 2 114 115 #define IGMPCTL_NAMES { \ 116 { 0, 0 }, \ 117 { "stats", CTLTYPE_STRUCT }, \ 118 } 119 #endif 120