mirror of
https://github.com/fleschutz/PowerShell.git
synced 2024-12-26 16:48:54 +01:00
42 lines
1.0 KiB
PowerShell
Executable File
42 lines
1.0 KiB
PowerShell
Executable File
<#
|
|
.SYNOPSIS
|
|
Checks the given subnet mask for validity
|
|
.DESCRIPTION
|
|
This PowerShell script checks the given subnet mask for validity.
|
|
.PARAMETER address
|
|
Specifies the subnet mask to check
|
|
.EXAMPLE
|
|
PS> ./check-subnet-mask.ps1 255.255.255.0
|
|
✅ subnet mask 255.255.255.0 is valid
|
|
.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 # success
|
|
} else {
|
|
write-warning "Invalid subnet mask: $address"
|
|
exit 1
|
|
}
|
|
} catch {
|
|
"⚠️ Error in line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])"
|
|
exit 1
|
|
}
|