62 lines
2.8 KiB
C
62 lines
2.8 KiB
C
/*
|
|
* Copyright (c) 1988 Stephen Deering.
|
|
* 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. 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.
|
|
*
|
|
* from: @(#)igmp.h 8.1 (Berkeley) 6/10/93
|
|
* $Id: igmp.h,v 1.3 1994/05/13 06:06:00 mycroft Exp $
|
|
*/
|
|
|
|
/* Internet Group Management Protocol (IGMP) definitions. */
|
|
|
|
/*
|
|
* IGMP packet format.
|
|
*/
|
|
struct igmp {
|
|
u_char igmp_type; /* version & type of IGMP message */
|
|
u_char igmp_code; /* unused, should be zero */
|
|
u_short igmp_cksum; /* IP-style checksum */
|
|
struct in_addr igmp_group; /* group address being reported */
|
|
}; /* (zero for queries) */
|
|
|
|
#define IGMP_MINLEN 8
|
|
|
|
#define IGMP_HOST_MEMBERSHIP_QUERY 0x11 /* message types, incl. version */
|
|
#define IGMP_HOST_MEMBERSHIP_REPORT 0x12
|
|
#define IGMP_DVMRP 0x13 /* for experimental multicast */
|
|
/* routing protocol */
|
|
|
|
#define IGMP_MAX_HOST_REPORT_DELAY 10 /* max delay for response to */
|
|
/* query (in seconds) */
|