Private/MaskCidr.ps1
# # Copyright 2018-2021, Alexis La Goutte <alexis.lagoutte at gmail dot com> # # SPDX-License-Identifier: Apache-2.0 # function Convert-ArubaCPCIDR2Mask { <# .SYNOPSIS Convert a CIDR to Mask .DESCRIPTION Convert a CIDR to Mask .EXAMPLE Convert-ArubaCPCIDR2Mask 24 Convert a CIDR (24) to Mask (255.255.255.0) #> Param( [Parameter (Mandatory = $true, ValueFromPipeline)] [int]$cidr ) Process { switch ($cidr) { "0" { $subnet = '0.0.0.0' } "1" { $subnet = '128.0.0.0' } "2" { $subnet = '192.0.0.0' } "3" { $subnet = '224.0.0.0' } "4" { $subnet = '240.0.0.0' } "5" { $subnet = '248.0.0.0' } "6" { $subnet = '252.0.0.0' } "7" { $subnet = '254.0.0.0' } "8" { $subnet = '255.0.0.0' } "9" { $subnet = '255.128.0.0' } "10" { $subnet = '255.192.0.0' } "11" { $subnet = '255.224.0.0' } "12" { $subnet = '255.240.0.0' } "13" { $subnet = '255.248.0.0' } "14" { $subnet = '255.252.0.0' } "15" { $subnet = '255.254.0.0' } "16" { $subnet = '255.255.0.0' } "17" { $subnet = '255.255.128.0' } "18" { $subnet = '255.255.192.0' } "19" { $subnet = '255.255.224.0' } "20" { $subnet = '255.255.240.0' } "21" { $subnet = '255.255.248.0' } "22" { $subnet = '255.255.252.0' } "23" { $subnet = '255.255.254.0' } "24" { $subnet = '255.255.255.0' } "25" { $subnet = '255.255.255.128' } "26" { $subnet = '255.255.255.192' } "27" { $subnet = '255.255.255.224' } "28" { $subnet = '255.255.255.240' } "29" { $subnet = '255.255.255.248' } "30" { $subnet = '255.255.255.252' } "31" { $subnet = '255.255.255.254' } "32" { $subnet = '255.255.255.255' } } $subnet } } |