LCOM1920-T02G10

/*        $NetBSD: igmp.h,v 1.12 2014/05/29 23:02:48 rmind Exp $        */

/*

 * Copyright (c) 1992, 1993

 *        The Regents of the University of California.  All rights reserved.

 *

 * This code is derived from software contributed to Berkeley by

 * Stephen Deering of Stanford University.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. Neither the name of the University nor the names of its contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 *

 *        @(#)igmp.h        8.1 (Berkeley) 6/10/93

 */

/*

 * Copyright (c) 1988 Stephen Deering.

 *

 * This code is derived from software contributed to Berkeley by

 * Stephen Deering of Stanford University.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. All advertising materials mentioning features or use of this software

 *    must display the following acknowledgement:

 *        This product includes software developed by the University of

 *        California, Berkeley and its contributors.

 * 4. Neither the name of the University nor the names of its contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 *

 *        @(#)igmp.h        8.1 (Berkeley) 6/10/93

 */

#ifndef _NETINET_IGMP_H_

#define _NETINET_IGMP_H_

/*

 * Internet Group Management Protocol (IGMP) definitions.

 *

 * MULTICAST 1.3

 */

/*

 * IGMP packet format.

 */

struct igmp {

        uint8_t                igmp_type;        /* version & type of IGMP message  */

        uint8_t                igmp_code;        /* code for routing sub-messages   */

        uint16_t        igmp_cksum;        /* IP-style checksum               */

        struct in_addr        igmp_group;        /* group address being reported    */

} __packed;                /*  (zero for queries)             */

#define        IGMP_MINLEN                        8

#define        IGMP_HOST_MEMBERSHIP_QUERY        0x11  /* membership query      */

#define        IGMP_v1_HOST_MEMBERSHIP_REPORT        0x12  /* v1 membership report  */

#define        IGMP_DVMRP                        0x13  /* DVMRP routing message */

#define        IGMP_PIM                        0x14  /* PIM routing message   */

#define        IGMP_v2_HOST_MEMBERSHIP_REPORT        0x16  /* v2 membership report  */

#define        IGMP_HOST_LEAVE_MESSAGE                0x17  /* leave-group message   */

#define        IGMP_MTRACE_REPLY                0x1e  /* traceroute reply      */

#define        IGMP_MTRACE_QUERY                0x1f  /* traceroute query      */

#define        IGMP_MAX_HOST_REPORT_DELAY        10    /* max delay for response to */

                                              /*  query (in seconds)       */

#define        IGMP_TIMER_SCALE                10    /* denominator for igmp_timer */

/*

 * States for the IGMP v2 state table.

 */

#define        IGMP_DELAYING_MEMBER        1

#define        IGMP_IDLE_MEMBER        2

#define        IGMP_LAZY_MEMBER        3

#define        IGMP_SLEEPING_MEMBER        4

#define        IGMP_AWAKENING_MEMBER        5

/*

 * States for IGMP router version cache.

 */

#define        IGMP_v1_ROUTER                1

#define        IGMP_v2_ROUTER                2

/*

 * Revert to v2 if we haven't heard from the router in this amount of time.

 */

#define        IGMP_AGE_THRESHOLD        540

#endif /* !_NETINET_IGMP_H_ */