1 /* $NetBSD: igmp_var.h,v 1.14 2002/06/30 22:40:33 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1988 Stephen Deering. 5 * Copyright (c) 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Stephen Deering of Stanford University. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 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. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the University of 22 * California, Berkeley and its contributors. 23 * 4. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 * 39 * @(#)igmp_var.h 8.1 (Berkeley) 7/19/93 40 */ 41 42 #ifndef _NETINET_IGMP_VAR_H_ 43 #define _NETINET_IGMP_VAR_H_ 44 45 /* 46 * Internet Group Management Protocol (IGMP), 47 * implementation-specific definitions. 48 * 49 * Written by Steve Deering, Stanford, May 1988. 50 * Modified by Rosen Sharma, Stanford, Aug 1994. 51 * Modified by Bill Fenner, Xerox PARC, Feb 1995. 52 * 53 * MULTICAST 1.3 54 */ 55 56 struct igmpstat { 57 u_quad_t igps_rcv_total; /* total IGMP messages received */ 58 u_quad_t igps_rcv_tooshort; /* received with too few bytes */ 59 u_quad_t igps_rcv_badsum; /* received with bad checksum */ 60 u_quad_t igps_rcv_queries; /* received membership queries */ 61 u_quad_t igps_rcv_badqueries; /* received invalid queries */ 62 u_quad_t igps_rcv_reports; /* received membership reports */ 63 u_quad_t igps_rcv_badreports; /* received invalid reports */ 64 u_quad_t igps_rcv_ourreports; /* received reports for our groups */ 65 u_quad_t igps_snd_reports; /* sent membership reports */ 66 }; 67 68 #ifdef _KERNEL 69 extern struct igmpstat igmpstat; 70 71 /* 72 * Macro to compute a random timer value between 1 and (IGMP_MAX_REPORTING_ 73 * DELAY * countdown frequency). We assume that the routine random() 74 * is defined somewhere (and that it returns a positive number). 75 */ 76 #define IGMP_RANDOM_DELAY(X) (arc4random() % (X) + 1) 77 78 #ifdef __NO_STRICT_ALIGNMENT 79 #define IGMP_HDR_ALIGNED_P(ig) 1 80 #else 81 #define IGMP_HDR_ALIGNED_P(ig) ((((vaddr_t) (ig)) & 3) == 0) 82 #endif 83 84 void igmp_init __P((void)); 85 void igmp_input __P((struct mbuf *, ...)); 86 void igmp_joingroup __P((struct in_multi *)); 87 void igmp_leavegroup __P((struct in_multi *)); 88 void igmp_fasttimo __P((void)); 89 void igmp_slowtimo __P((void)); 90 #endif 91 92 #endif /* _NETINET_IGMP_VAR_H_ */ 93