启用、停用网卡.txt

采用Visual C++禁用或启用网卡(实践通过)

这是启用、停用网卡的一段代码，可以参考
BOOL DisableNetInterface(BOOL bStatus)
{
    //IN LPTSTR HardwareId="PCI\\VEN_10EC&DEV_8139&SUBSYS_813910EC&REV_10" ;
IN LPTSTR HardwareId="{4D36E972-E325-11CE-BFC1-08002BE10318}" ;
    //硬件ComponentId，注册表地址：system\currentcontrolset\class\{4D36E972-E325-11CE-BFC1-08002BE10318}\0000

    DWORD NewState ;
    
//调用ddk函数，来禁用网卡    
    DWORD i,err ;
    BOOL Found=FALSE ;
    
    HDEVINFO hDevInfo ;
    SP_DEVINFO_DATA spDevInfoData ;
    
    if(bStatus)
    {
        NewState=DICS_DISABLE ;
        //禁用
    }
    else 
    {
        NewState=DICS_ENABLE ;
        //启用
    }
    //访问系统的硬件库
    hDevInfo=SetupDiGetClassDevs(NULL,"PCI",NULL,DIGCF_ALLCLASSES|DIGCF_PRESENT);
    if(hDevInfo==INVALID_HANDLE_VALUE)
    {
        printf("访问系统硬件出错！");
        return FALSE ;
    }
    
    //枚举硬件，获得需要的接口
    spDevInfoData.cbSize=sizeof(SP_DEVINFO_DATA);
BOOL flagEnum;
    for(i=0;flagEnum = SetupDiEnumDeviceInfo(hDevInfo,i,&spDevInfoData);i++)
    {
        DWORD DataT ;
        LPTSTR p;
        CHAR buffer[100]={0};
DWORD buffersize=0 ;
        
        //获得硬件的属性值
buffersize = sizeof(buffer);
        while(!SetupDiGetDeviceRegistryProperty(
hDevInfo,
&spDevInfoData,
SPDRP_CLASSGUID,
&DataT,
(PBYTE)buffer,
buffersize,
&buffersize))
        {
DWORD a = GetLastError();
            if(GetLastError()==ERROR_INVALID_DATA)
            {
                //不存在HardwareID. Continue.
                break ;
            }
            else if(GetLastError()==ERROR_INSUFFICIENT_BUFFER)
            {
                //buffer size不对.
                if(buffer)
LocalFree(buffer);
//                buffer=(char*)LocalAlloc(LPTR,buffersize);
            }
            else 
            {
                //未知错误
                goto cleanup_DeviceInfo ;
            }
        }
        
        if(GetLastError()==ERROR_INVALID_DATA)
continue ;
        
if(NULL == buffer)
{
//LocalFree(buffer);
continue ;
}
if(!strcmpi(HardwareId,buffer))
        {
SP_PROPCHANGE_PARAMS spPropChangeParams ;
            
            spPropChangeParams.ClassInstallHeader.cbSize=sizeof(SP_CLASSINSTALL_HEADER);
            spPropChangeParams.ClassInstallHeader.InstallFunction=DIF_PROPERTYCHANGE ;
            spPropChangeParams.Scope=DICS_FLAG_GLOBAL ;
            spPropChangeParams.StateChange=NewState ;
            //禁用：DICS_DISABLE，DICS_ENABLE启用
            
            //
            if(!SetupDiSetClassInstallParams(hDevInfo,&spDevInfoData,(SP_CLASSINSTALL_HEADER*)&spPropChangeParams,sizeof(spPropChangeParams)))
            {
                DWORD errorcode=GetLastError();
            }
            
            if(!SetupDiCallClassInstaller(DIF_PROPERTYCHANGE,hDevInfo,&spDevInfoData))
            {
                DWORD errorcode=GetLastError();
            }
            
            switch(NewState)
            {
                case DICS_DISABLE :
printf("成功禁用网络！");
                break ;
                case DICS_ENABLE :
printf("成功启用网络！");
                break ;
            }
            
            //break ;
        //}
}
        
    }
    
    //退出时，清理工作环境
cleanup_DeviceInfo :
    err=GetLastError();
    SetupDiDestroyDeviceInfoList(hDevInfo);
    SetLastError(err);
    
    return TRUE ;
}