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35 lines
864 B
PowerShell
Executable File
35 lines
864 B
PowerShell
Executable File
#!/usr/bin/pwsh
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<#
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.SYNTAX check-ipv4-address.ps1 [<address>]
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.DESCRIPTION checks the given IPv4 address for validity
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.LINK https://github.com/fleschutz/PowerShell
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.NOTES Author: Markus Fleschutz / License: CC0
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#>
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param($Address = "")
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function IsIPv4AddressValid { param([string]$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 "" ) {
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$Address = read-host "Enter IPv4 address to validate"
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}
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if (IsIPv4AddressValid $Address) {
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write-host -foregroundColor green "OK - IPv4 address $Address is valid"
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exit 0
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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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write-error "ERROR: line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])"
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exit 1
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}
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