# encoding: ascii
# api: powershell
# title: validate an IP address
# description: REALLY validates given IP address and returns True/False. The original script didn’t allow ZEROS in the Ip address (eg: 127.0.0.1 returned $false)
# version: 0.1
# author: Joel Bennett
# license: CC0
# x-poshcode-id: 1172
# x-derived-from-id: 5781
# x-archived: 2017-05-30T18:42:04
# x-published: 2010-06-25T01:28:00
#
# now without trap
#
# validate given IP address as an IPAdress (given string input)
PARAM($IP=$(read-host "Enter any IP Address"))
## YOU could do this, but ...
# $IP -match "(\d{1,3}).(\d{1,3}).(\d{1,3}).(\d{1,3})" -and -not ([int[]]$matches[1..4] -gt 255)
## you shouldn't parse things yourself when it's in the framework. You might make a mistake ;-)
#trap { return $false }
#[IPAddress]$IP # Just cast it to an IPAddress ... if it's valid, it will work.
#return $true
## no trap needed if tryparse is used
#[system.net.IPAddress]::tryparse($ip,[ref]$null)
# when you still need the parsed IP number :
[ref]$a = $null
[system.net.IPAddress]::tryparse($ip,$a)