MFC操作注册表获取USB磁盘代码阅读步骤总结

逃离我推掉我的手 2022-05-30 06:45 656阅读 0赞

1.获取设备路径接口
    •m_lpClassGuid=_GUID GUID_DEVINTERFACE_USB_HOST_CONTROLLER  {3ABF6F2D-71C4-462A-8A92-1E6861E6AF27}
    •
    •m_hDevInfo = SetupDiGetClassDevs( (LPGUID)
      m_lpClassGuid,NULL,NULL,DIGCF_PRESENT |DIGCF_DEVICEINTERFACE);
    
          SetupDiEnumDeviceInterfaces( m_hDevInfo,NULL,m_lpClassGuid,             m_Index,&deviceInterfaceData);
    
        获取到deviceInterfaceData= {3ABF6F2D-71C4-462A-8A92-1E6861E6AF27}
    
    SetupDiGetDeviceInterfaceDetail( m_hDevInfo, &deviceInterfaceData,
             (PSP_DEVICE_INTERFACE_DETAIL_DATA_A)&tmpPath,
      dwBytesReturned,&dwBytesReturned,  0);
            获取到设备路径接口tmpPath=
    {"\\\\?\\pci#ven_8086&dev_a12f&subsys_079b1028&rev_31#3&11583659&0&a0#{3abf6f2d-71c4-462a-8a92-1e6861e6af27}" }

2.获取RootHup

m_hDevice = CreateFileA(path.getString(),
                              GENERIC_READ | GENERIC_WRITE,
                               FILE_SHARE_READ | FILE_SHARE_WRITE,
                               &SA,
                               OPEN_EXISTING,
                               FILE_FLAG_NO_BUFFERING,
                               NULL);
    DeviceIoControl(m_hDevice,
           	 IOCTL_USB_GET_ROOT_HUB_NAME,
          	  NULL,
           	 0,
           	 rootHubNameW,
           	 nBytes,
            	&nBytes,NULL);
    获取到rootHubNameW=
    L"IUSB3#ROOT_HUB30#4&23490922&0#{f18a0e88-c30c-11d0-8815-00a0c906bed8}" }
    转换成"\\\\.\\IUSB3#ROOT_HUB30#4&23490922&0#{f18a0e88-c30c-11d0-8815-00a0c906bed8}"

3.获取ports

m_hDevice = CreateFileA(path.getString(),
                               GENERIC_READ | GENERIC_WRITE,
                               FILE_SHARE_READ | FILE_SHARE_WRITE,
                               &SA,
                               OPEN_EXISTING,
                               FILE_FLAG_NO_BUFFERING,
                               NULL);
    获取到m_hDevice 
    
     ConnectInfo.ConnectionIndex=ConnectionIndex;
       DeviceIoControl(m_hDevice,
            IOCTL_USB_GET_NODE_CONNECTION_INFORMATION,
            &ConnectInfo,
            sizeof(USB_NODE_CONNECTION_INFORMATION),
            &ConnectInfo,
            sizeof(USB_NODE_CONNECTION_INFORMATION),
            &nBytes,NULL);
    获取到设备状态信息ConnectInfo用来进行判断选择使用
    
    DeviceIoControl(m_hDevice,
    	        IOCTL_USB_GET_NODE_CONNECTION_NAME,
           	        &extHubName,
           	        sizeof(extHubName),
            	        &extHubName,
           	       sizeof(extHubName),
            	       &nBytes,
            	       NULL);
    获取设备相关数据extHubName --- nBytes = extHubName.ActualLength;
    
    DeviceIoControl(m_hDevice,
            IOCTL_USB_GET_NODE_CONNECTION_NAME,
            extHubNameW,
            nBytes,
            extHubNameW,
            nBytes,
            &nBytes,
            NULL);
    获得的具体port 
    extHubNameW=
     {L"USB#VID_05E3&PID_0608#5&215f119a&0&1#{f18a0e88-c30c-11d0-8815-00a0c906bed8}" }

4.获取port下的设备信息

path.getString()="\\\\.\\USB#VID_05E3&PID_0608#5&215f119a&0&1#{f18a0e88-c30c-11d0-8815-00a0c906bed8}
    
    m_hDevice = CreateFileA(path.getString(),
                               GENERIC_READ | GENERIC_WRITE,
                               FILE_SHARE_READ | FILE_SHARE_WRITE,
                               &SA,
                               OPEN_EXISTING,
                               FILE_FLAG_NO_BUFFERING,
                               NULL);
    DeviceIoControl(m_hDevice,
            IOCTL_USB_GET_NODE_INFORMATION,
            &HubInfo,
            sizeof(USB_NODE_INFORMATION),
            &HubInfo,
            sizeof(USB_NODE_INFORMATION),
            &nBytes,
            NULL);
    获得设备相关信息 pNodeInfo = HubInfo；
    可以获得当前集线器的port数量（4）
    
     DeviceIoControl(m_hDevice,
            IOCTL_USB_GET_NODE_CONNECTION_DRIVERKEY_NAME,
            &driverKeyName,
            sizeof(driverKeyName),
            &driverKeyName,
            sizeof(driverKeyName),
            &nBytes,NULL);
    nBytes= driverKeyName.ActualLength;
    
    bSuccess = DeviceIoControl(m_hDevice,
            IOCTL_USB_GET_NODE_CONNECTION_DRIVERKEY_NAME,
            driverKeyNameW,
            nBytes,
            driverKeyNameW,
            nBytes,
            &nBytes,NULL);
    获取得4个port下连接的设备的路径：
    driverKeyNameW->DriverKeyName：
    "{36fc9e60-c465-11cf-8056-444553540000}\\0032"
    
    CM_Locate_DevNode(&devInst,NULL,0);
    
    CM_Get_DevNode_Registry_Property(devInst,
                                                  CM_DRP_DRIVER,NULL,buf,&len,0);
    
    CM_Get_DevNode_Registry_Property(devInst,
              		             CM_DRP_DEVICEDESC,NULL,buf,&len,0);
    
    通过遍历最终得到设备句柄： *pdInst = devInst=3912；
    CM_Get_Child( pOut, pdInst, 0 );
    得到pOut=3992

•m_lpClassGuid=DiskClassGuid{53f56307-b6bf-11d0-94f2-00a0c91efb8b}
    m_hDevInfo= SetupDiGetClassDevs((LPGUID)m_lpClassGuid,
    
    NULL,NULL,DIGCF_PRESENT|DIGCF_DEVICEINTERFACE);
    
    通过 SetupDiEnumDeviceInfo(m_hDevInfo, m_Index,&DevInfoData);
    
    遍历得到DevInfoData.DevInst，判断是否与pOut相等来获取disk路径tmpPath：
    
     
    
    •SetupDiGetDeviceInterfaceDetail( m_hDevInfo,
            &deviceInterfaceData,
    
           (PSP_DEVICE_INTERFACE_DETAIL_DATA_A)&tmpPath,
    
            dwBytesReturned,&dwBytesReturned,0);
    
    tmpPath：
    
    "\\\\?\\usbstor#disk&ven_is817&prod_innostor&rev_1.00#7&2d26cad4&0#{53f56307-b6bf-11d0-94f2-00a0c91efb8b}"

5.根据获得的信息获取设置DISK盘符名称

path.getString() = \\\\?\\usbstor#disk&ven_is817&prod_innostor&rev_1.00#7&2d26cad4&0#{53f56307-b6bf-11d0-94f2-00a0c91efb8b}"
    
    m_hDevice = CreateFileA(path.getString(),
                               GENERIC_READ | GENERIC_WRITE,
                               FILE_SHARE_READ | FILE_SHARE_WRITE,
                               &SA,
                               OPEN_EXISTING,
                               FILE_FLAG_NO_BUFFERING,
                               NULL);
    DeviceIoControl(m_hDevice,
    		IOCTL_STORAGE_GET_DEVICE_NUMBER,
    		NULL, 0 , &sdn1 , sizeof(sdn1),&dwBytesReturned,
    		NULL);
    str.getString()=D到Z的盘符；
     hDrive = CreateFile(str.getString(),
                                 GENERIC_READ | GENERIC_WRITE,
                                 FILE_SHARE_READ | FILE_SHARE_WRITE,
                                 &SA, OPEN_EXISTING,
                                 FILE_FLAG_NO_BUFFERING,NULL
                             );
     DeviceIoControl(hDrive,
                                      IOCTL_STORAGE_GET_DEVICE_NUMBER,
                                      NULL, 0, &sdn2, sizeof(sdn2), &dwBytesReturned,
                                      NULL);

通过找到与sdn1相等的sdn2的盘符即为所需的盘符

整体usb获取步骤如图呈现的树状形式来操作

![20180307092326322][]

[20180307092326322]: /images/20220530/24e47c5ddee1457fbc58cac9c2953e1d.png