PowerShell/Scripts/check-subnet-mask.ps1
2021-09-16 20:19:10 +02:00

39 lines
961 B
PowerShell
Executable File

<#
.SYNOPSIS
check-subnet-mask.ps1 [<address>]
.DESCRIPTION
Checks the given subnet mask for validity.
.EXAMPLE
PS> .\check-subnet-mask.ps1 255.255.255.0
.LINK
https://github.com/fleschutz/PowerShell
.NOTES
Author: Markus Fleschutz · License: CC0
#>
param([string]$address = "")
function IsSubNetMaskValid { param([string]$IP)
$RegEx = "^(254|252|248|240|224|192|128).0.0.0$|^255.(254|252|248|240|224|192|128|0).0.0$|^255.255.(254|252|248|240|224|192|128|0).0$|^255.255.255.(255|254|252|248|240|224|192|128|0)$"
if ($IP -match $RegEx) {
return $true
} else {
return $false
}
}
try {
if ($address -eq "" ) { $address = read-host "Enter subnet mask to validate" }
if (IsSubNetMaskValid $address) {
"✔️ subnet mask $Address is valid"
exit 0
} else {
write-warning "Invalid subnet mask: $address"
exit 1
}
} catch {
"⚠️ Error: $($Error[0]) ($($MyInvocation.MyCommand.Name):$($_.InvocationInfo.ScriptLineNumber))"
exit 1
}