Functions/Expand-IPv6.ps1
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function Expand-IPV6 { <# .SYNOPSIS Takes an abbreviated IPv6 string and expands it fully .DESCRIPTION Takes an abbreviated IPv6 string and expands it fully .PARAMETER IPv6 A string parameter that represents an IPv6 address. Aliased to 'Address' .PARAMETER IncludeInput Switch that will display the input parameter along with the result .EXAMPLE Expand-IPV6 'fe98::726d:daad:2afc:5393%18' Would return: FE98:0000:0000:0000:726D:DAAD:2AFC:0000 .EXAMPLE Expand-IPV6 'fe98::726d:daad:2afc:5393' Would return: FE98:0000:0000:0000:726D:DAAD:2AFC:5393 .EXAMPLE Expand-IPV6 -IPv6 '::1' Would return: 0000:0000:0000:0000:0000:0000:0000:0001 .EXAMPLE '::1', 'fe98::726d:daad:2afc:5393' | Expand-IPV6 -IncludeInput OriginalIPv6 ExpandedIPv6 ------------ ------------ ::1 0000:0000:0000:0000:0000:0000:0000:0001 fe98::726d:daad:2afc:5393 FE98:0000:0000:0000:726D:DAAD:2AFC:5393 .NOTES Source: https://badflyer.com/powershell-ipv4-to-ipv6/ Changes: - added comment help - minor formatting changes - change IPv6 to string array - added IncludeInput parameter #> [CmdletBinding()] [Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSUseDeclaredVarsMoreThanAssignments','')] param ( [Parameter(Mandatory, Position = 0, ValueFromPipeline, ValueFromPipelineByPropertyName)] [Alias('Address')] [string[]] $IPv6, [switch] $IncludeInput ) begin { Write-Verbose -Message "Starting [$($MyInvocation.Mycommand)]" } process { foreach ($curIPv6 in $IPv6) { $count = 0 $loc = -1 # Count the number of colons, and keep track of the double colon for ($i = 0; $i -lt $curIPv6.Length; $i++) { if ($curIPv6[$i] -eq ':') { $count++ if (($i - 1) -ge 0 -and $curIPv6[$i - 1] -eq ':') { $loc = $i } } } # If we didnt find a double colon and the count isn't 7, then throw an exception if ($loc -lt 0 -and $count -ne 7) { throw 'Invalid IPv6 Address' } # Add in any missing colons if we had a double $cleaned = $curIPv6 if ($count -lt 7) { $cleaned = $curIPv6.Substring(0, $loc) + (':' * (7 - $count)) + $curIPv6.Substring($loc) } # Parse current values in fill in new IP with hex numbers padded to 4 digits $result = @() foreach ($splt in $cleaned -split ':') { $val = 0 $r = [int]::TryParse($splt, [System.Globalization.NumberStyles]::HexNumber, [System.Globalization.CultureInfo]::InvariantCulture, [ref]$val) $result += ('{0:X4}' -f $val) } $result = $result -join ':' if ($IncludeInput) { New-Object -TypeName psobject -Property ([ordered] @{ OriginalIPv6 = $curIPv6 ExpandedIPv6 = $result }) } else { Write-Output -InputObject $result } } } end { Write-Verbose -Message "Ending [$($MyInvocation.Mycommand)]" } } |