igmp.h

用于嵌入式系统的TCP/IP协议栈及若干服务

/*
*            Copyright (c) 1998-2001 by NETsilicon Inc.
*
*  This software is copyrighted by and is the sole property of
*  NETsilicon.  All rights, title, ownership, or other interests
*  in the software remain the property of NETsilicon.  This
*  software may only be used in accordance with the corresponding
*  license agreement.  Any unauthorized use, duplication, transmission,
*  distribution, or disclosure of this software is expressly forbidden.
*
*  This Copyright notice may not be removed or modified without prior
*  written consent of NETsilicon.
*
*  NETsilicon, reserves the right to modify this software
*  without notice.
*
*  NETsilicon
*  411 Waverley Oaks Road                  USA 781.647.1234
*  Suite 227                               http://www.netsilicon.com
*  Waltham, MA 02452                       [e-mail]
*
*************************************************************************
*  $Name: Fusion 6.52 Fusion 6.51 $
*  $Date: 2001/09/20 10:19:19 $
*  $Source: M:/psisrc/stack/incl/rcs/igmp.h $
*  $Revision: 1.11 $
*************************************************************************
*  File Description:  Header for igmp.c
***************************************************************************/

#ifndef _IGMP_
#define _IGMP_

#include "config.h"
#include "ccdep.h"
#include "q.h"
#include "std.h"
#include "timer.h"

/* For IGMP v2.  There is no longer a version.  The
 * full byte is used for a type field.  However, this is
 * backwards compatible since the upper nibble is always 1.  

#define IGMP_QUERY	1
#define IGMP_REPORT	2
#define IGMP_VERSION	1		
*/

#define IGMP_QUERY		0x11
#define IGMP_V2_REPORT	0x16
#define IGMP_V2_LEAVE	0x17
#define IGMP_V1_REPORT	0x12

#ifndef IGMP_CNT
#define IGMP_CNT	10	/* default ICMP count */
#endif /* IGMP_CNT */

#define IGMP_ALLHOST	0xe0000001
#define IGMP_ALLROUTER  0xe0000002

/* MAT:  IGMP_V1_ROUTER_PRESENT_TIMEOUT is the time a V2 host must wait after
   hearing a V1 membership query (Max response time of zero) before it can 
   respond to query with a IGMP_V2_REPORT. Until IGMP_V1_ROUTER_PRESENT_TIMEOUT
   expires the host must respond to all queries with a V1 report.
*/
#ifndef IGMP_V1_ROUTER_PRESENT_TIMEOUT
#define IGMP_V1_ROUTER_PRESENT_TIMEOUT	400 /* Seconds */
#endif

typedef struct sigmp_entry {
/* OL: re-arranged for 32-bit alignment */
	u8				state;		/* igmp state see below	*/
	u8				refs;		/* reference count */
	u16				pad;
	struct netdev			*ndp;		/* device driver */
	u32				ip_multi;	/* multicast IP address */
	tcb				*timer;		/* timer queue for this entry */
	u8				last_2_report; /* Flag set to 1 indicating we were the last host
									  to send a report and cleared when we see a 
									  report from another host.
									*/
	u32				seed;
} igmp_entry;
/* 7/12/96 ML: conflicts with igmp.c.
extern igmp_entry *igmp_tbl;
*/
/* igmp stat */
#define IGMP_FREE		0
#define IGMP_DELAY		1
#define IGMP_IDLE		2
#define IGMP_STATIC		3

typedef u8 IGMP_T;
#define IGMP_T_IGMP_TYPE    0                   /* message type, 1 byte */
#define IGMP_T_MAX_RESP_TIME IGMP_T_IGMP_TYPE+1  /* error code, 1 byte */
#define IGMP_T_IGMP_CHECKSUM IGMP_T_MAX_RESP_TIME+1 /* checksum, 2 bytes */
#define IGMP_T_IP_ADDR  	IGMP_T_IGMP_CHECKSUM+2 /* miscellaneous fields, 4 bytes */
#define SIZEOF_IGMP_T       (IGMP_T_IP_ADDR+4)

#define IGMP_VER(igmphp) (((igmphp)[IGMP_T_IGMP_TYPE] >> 4) & 0xf)
/* For IGMPv2 the type is now the full byte.  MAT 
#define IGMP_TP(igmphp) ((igmphp)->igmp_type & 0xf)
*/
#define IGMP_TP(igmphp) (igmphp)[IGMP_T_IGMP_TYPE]
#endif /* _IGMP_ */