Bare-Metal Systems Engineering,
High-Availability Clusters & Fleet Automation

⚡ Low-Level USB Driver & Fleet Management Engine Example

# Win32 DeviceIoControl Low-Level Hardware Interrogation & AD Provisioning
$pInvokeSignatures = @'
[DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Auto)]
public static extern SafeFileHandle CreateFile(
    string lpFileName, uint dwDesiredAccess, uint dwShareMode,
    IntPtr lpSecurityAttributes, uint dwCreationDisposition,
    uint dwFlagsAndAttributes, IntPtr hTemplateFile);

[DllImport("kernel32.dll", SetLastError = true)]
public static extern bool DeviceIoControl(
    SafeFileHandle hDevice, uint dwIoControlCode,
    byte[] lpInBuffer, uint nInBufferSize,
    byte[] lpOutBuffer, uint nOutBufferSize,
    out uint lpBytesReturned, IntPtr lpOverlapped);
'@
Add-Type -MemberDefinition $pInvokeSignatures -Name "Win32RawDevice" -Namespace "HardwareOps"

# Query attached printer hardware register via raw IOCTL control code
function Get-PrinterHardwareTelemetry([string]$devicePath) {
    $hDevice = [HardwareOps.Win32RawDevice]::CreateFile($devicePath, 0xC0000000, 3, [IntPtr]::Zero, 3, 0, [IntPtr]::Zero)
    if (-not $hDevice.IsInvalid) {
        $outBuffer = New-Object byte[] 1024
        $bytesReturned = 0
        # IOCTL_USB_PRINT_GET_LPT_STATUS / PJL info query
        $result = [HardwareOps.Win32RawDevice]::DeviceIoControl($hDevice, 0x00220014, $null, 0, $outBuffer, 1024, [ref]$bytesReturned, [IntPtr]::Zero)
        $hDevice.Close()
        return (Parse-TelemetryMetrics $outBuffer $bytesReturned)
    }
}