igmp.h

基于nucleus操作系统的GPRS无线数据传输终端全套源文件。包括支持ARM7的BSP,操作系统

/***********************************************************************
*                                                                       
*        Copyright (c) 1993 - 2001 Accelerated Technology, Inc.         
*                                                                       
* PROPRIETARY RIGHTS of Accelerated Technology are involved in the      
* subject matter of this material.  All manufacturing, reproduction,    
* use, and sales rights pertaining to this subject matter are governed  
* by the license agreement.  The recipient of this software implicitly  
* accepts the terms of the license.                                     
*                                                                       
*************************************************************************/
/***********************************************************************
*                                                                       
* FILE NAME                                      VERSION                        
*                                                                               
*      IGMP.H                                      4.4                          
*                                                                               
* COMPONENT                                                             
*                                                                       
*      IGMP -     Implements the IGMP protocol.                         
*                                                                       
* DESCRIPTION                                                           
*                                                                       
*      This header file holds all the includes and defines used in IGMP.
*                                                                       
* DATA STRUCTURES                                                       
*                                                                       
*     IGMP_LAYER                                                        
*                                                                       
* DEPENDENCIES                                                          
*                                                                       
*      No other file dependencies                                       
*                                                                       
*************************************************************************/


#ifndef IGMP_H
#define IGMP_H

#ifdef          __cplusplus
extern  "C" {                               /* C declarations in C++     */
#endif /* _cplusplus */

typedef struct _IGMP_LAYER
{
    UINT8   igmp_type;
    UINT8   igmp_unused;
    UINT16  igmp_cksum;
    UINT32  igmp_group;
} IGMP_LAYER;

/* This is the IP address that all level 2 conforming hosts should be a member of. */
#define IGMP_ALL_HOSTS_GROUP   0xE0000001UL 

/* IGMP packet types. */
#define IGMP_HOST_MEMBERSHIP_QUERY      0x11
#define IGMP_HOST_MEMBERSHIP_REPORT     0x12


/* This macro is used to send a IGMP report after some time delay. */
#define IGMP_REPORT_EVENT(ipm) \
/* IP_MULTI *ipm; */            \
{ \
    if ((ipm) != NU_NULL) \
    { \
        /* Send a report of the membership.*/ \
        IGMP_Send((IP_MULTI *)(ipm)); \
        ((IP_MULTI *)ipm)->ipm_timer = 0; \
    } \
} /* IGMP_Report_Event */

STATUS  IGMP_Initialize(DV_DEVICE_ENTRY *device);
VOID    IGMP_Join(IP_MULTI *ipm);
VOID    IGMP_Send(IP_MULTI *ipm);
UINT32  IGMP_Random_Delay(IP_MULTI *ipm);
VOID    IGMP_Report_Event(IP_MULTI *ipm);
VOID    IGMP_Leave(IP_MULTI *ipm);
STATUS  IGMP_Interpret(NET_BUFFER *buf_ptr, INT hlen);

#define IGMP_TYPE_OFFSET 0
#define IGMP_UNUSED_OFFSET 1
#define IGMP_CKSUM_OFFSET 2
#define IGMP_GROUP_OFFSET 4

#ifdef          __cplusplus
}
#endif /* _cplusplus */


#endif /* IGMP_H */