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42 lines
990 B
PowerShell
Executable File
42 lines
990 B
PowerShell
Executable File
<#
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.SYNOPSIS
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Checks an IPv4 address for validity
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.DESCRIPTION
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This script checks the given IPv4 address for validity.
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.PARAMETER Address
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Specifies the IPv4 address to check
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.EXAMPLE
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PS> ./check-ipv4-address 192.168.11.22
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✔️ IPv4 192.168.11.22 is valid
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.LINK
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https://github.com/fleschutz/PowerShell
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.NOTES
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Author: Markus Fleschutz · License: CC0
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#>
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param([string]$Address = "")
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function IsIPv4AddressValid { param([string]$IP)
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$RegEx = "^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$"
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if ($IP -match $RegEx) {
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return $true
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} else {
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return $false
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}
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}
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try {
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if ($Address -eq "" ) { $Address = read-host "Enter IPv4 address to validate" }
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if (IsIPv4AddressValid $Address) {
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"✔️ IPv4 $Address is valid"
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exit 0 # success
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} else {
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write-warning "Invalid IPv4 address: $Address"
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exit 1
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}
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} catch {
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"⚠️ Error: $($Error[0]) ($($MyInvocation.MyCommand.Name):$($_.InvocationInfo.ScriptLineNumber))"
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exit 1
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}
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