internal/functions/math/ConvertTo-SubnetMask.ps1
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function ConvertTo-SubnetMask { <# .SYNOPSIS Converts the size of a mask into the mask as IPAddress .DESCRIPTION Converts the size of a mask into the mask as IPAddress .PARAMETER MaskSize The size of the subnet. Valid between 1 and 32 .EXAMPLE PS C:\> ConvertTo-SubnetMask -MaskSize 30 Converts the size (30) into the mask as IPAddress #> [OutputType([IPAddress])] [CmdletBinding()] param ( [ValidateRange(1, 32)] [int] $MaskSize ) process { $binaryString = ("1") * $MaskSize + ("0") * (32 - $MaskSize) $bytes = foreach ($number in (0 .. 3)) { [convert]::ToByte($binaryString.SubString(($number * 8), 8), 2) } [IPAddress]::new($bytes) } } |