Private/GetIPAddressClass.ps1
|
function GetIPAddressClass { [CmdletBinding(DefaultParameterSetName='Calculate')] param( [Parameter(ParameterSetName='Calculate',Mandatory=$true)] [ValidateScript({if((([ipaddress]$_).Address -band ([ipaddress]'255.0.0.0').Address) -eq 0){throw "First octet may not be 0"}else{$true}})] [ipaddress]$IPAddress, [Parameter(ParameterSetName='List',Mandatory=$true)] [switch]$List ) begin{ $classRanges = @( [pscustomobject]@{IPAddress = [ipaddress]'0.0.0.0';Mask = [ipaddress]'255.0.0.0';DefaultSubnetMask = $null;Class = 'NotValid'} [pscustomobject]@{IPAddress = [ipaddress]'127.0.0.0';Mask = [ipaddress]'255.0.0.0';DefaultSubnetMask = [ipaddress]'255.0.0.0';Class = 'LoopBackAndDiagnostics'} [pscustomobject]@{IPAddress = [ipaddress]'0.0.0.0';Mask = [ipaddress]'128.0.0.0';DefaultSubnetMask = [ipaddress]'255.0.0.0';Class = 'A'} [pscustomobject]@{IPAddress = [ipaddress]'128.0.0.0';Mask = [ipaddress]'192.0.0.0';DefaultSubnetMask = [ipaddress]'255.255.0.0';Class = 'B'} [pscustomobject]@{IPAddress = [ipaddress]'192.0.0.0';Mask = [ipaddress]'224.0.0.0';DefaultSubnetMask = [ipaddress]'255.255.255.0';Class = 'C'} [pscustomobject]@{IPAddress = [ipaddress]'224.0.0.0';Mask = [ipaddress]'240.0.0.0';DefaultSubnetMask = $null;Class = 'D'} [pscustomobject]@{IPAddress = [ipaddress]'240.0.0.0';Mask = [ipaddress]'240.0.0.0';DefaultSubnetMask = $null;Class = 'E'} ) } process{ switch($PSCmdlet.ParameterSetName){ 'Calculate' { $classRange = -1 do { $classRange++ $class = $classRanges[$classRange].Class } until ($classRanges[$classRange].IPAddress.Address -eq ($IPaddress.Address -band $classRanges[$classRange].Mask.Address)) if(($IPAddress.Address -band ([ipaddress]'255.255.0.0').Address) -eq ([IPAddress]'169.254.0.0').Address){ Write-Verbose -Message "Is APIPA address" } $class } 'List' { $classRanges[0..($classRanges.Count -1)] } } } end{} } |