1 /* $NetBSD: igmp.h,v 1.8 1999/11/20 00:37:58 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.h 8.1 (Berkeley) 6/10/93 40 */ 41 42 #ifndef _NETINET_IGMP_H_ 43 #define _NETINET_IGMP_H_ 44 45 /* 46 * Internet Group Management Protocol (IGMP) definitions. 47 * 48 * MULTICAST 1.3 49 */ 50 51 /* 52 * IGMP packet format. 53 */ 54 struct igmp { 55 u_int8_t igmp_type; /* version & type of IGMP message */ 56 u_int8_t igmp_code; /* code for routing sub-messages */ 57 u_int16_t igmp_cksum; /* IP-style checksum */ 58 struct in_addr igmp_group; /* group address being reported */ 59 } __attribute__((__packed__)); /* (zero for queries) */ 60 61 #define IGMP_MINLEN 8 62 63 #define IGMP_HOST_MEMBERSHIP_QUERY 0x11 /* membership query */ 64 #define IGMP_v1_HOST_MEMBERSHIP_REPORT 0x12 /* v1 membership report */ 65 #define IGMP_DVMRP 0x13 /* DVMRP routing message */ 66 #define IGMP_PIM 0x14 /* PIM routing message */ 67 #define IGMP_v2_HOST_MEMBERSHIP_REPORT 0x16 /* v2 membership report */ 68 #define IGMP_HOST_LEAVE_MESSAGE 0x17 /* leave-group message */ 69 #define IGMP_MTRACE_REPLY 0x1e /* traceroute reply */ 70 #define IGMP_MTRACE_QUERY 0x1f /* traceroute query */ 71 72 #define IGMP_MAX_HOST_REPORT_DELAY 10 /* max delay for response to */ 73 /* query (in seconds) */ 74 75 #define IGMP_TIMER_SCALE 10 /* denominator for igmp_timer */ 76 77 /* 78 * States for the IGMP v2 state table. 79 */ 80 #define IGMP_DELAYING_MEMBER 1 81 #define IGMP_IDLE_MEMBER 2 82 #define IGMP_LAZY_MEMBER 3 83 #define IGMP_SLEEPING_MEMBER 4 84 #define IGMP_AWAKENING_MEMBER 5 85 86 /* 87 * States for IGMP router version cache. 88 */ 89 #define IGMP_v1_ROUTER 1 90 #define IGMP_v2_ROUTER 2 91 92 /* 93 * Revert to v2 if we haven't heard from the router in this amount of time. 94 */ 95 #define IGMP_AGE_THRESHOLD 540 96 97 #endif /* _NETINET_IGMP_H_ */ 98