Deviceiocontrol driver

 · Actually i develop packet filter driver. So packet capture function in drver is called. I want to send this packet data captured to app. But DeviceIoControl have to called in app. App only need to read packet data from driver when driver Reviews: 8.  · Drivers can use IoValidateDeviceIoControlAccess to perform stricter access checking than that provided by an IOCTL's RequiredAccess bits. Other useful macros. The following macros are useful for extracting the bit DeviceType and 2-bit TransferType fields from an IOCTL code.  · A driver can call IoBuildDeviceIoControlRequestto set up IRPs for device control requests that it synchronously sends to lower-level drivers. After calling IoBuildDeviceIoControlRequestto create a request, the driver must call IoCallDriverto send the request to the next-lower driver.

Actually i develop packet filter driver. So packet capture function in drver is called. I want to send this packet data captured to app. But DeviceIoControl have to called in app. App only need to read packet data from driver when driver send. This send work occure faster than 1seconds. To retrieve a handle to the device, you must call the CreateFile function with either the name of a device or the name of the driver associated with a device. To specify a device name, use the following format: \.\DeviceName. DeviceIoControl can accept a handle to a specific device. Possibly, a user-mode driver has called DeviceIoControl, passing in a driver-defined (also called private) I/O control code, to request device- or driver-specific support from a closely coupled, kernel-mode device driver. On receipt of a device I/O control request, a higher-level driver usually passes the IRP on to the next-lower driver.

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