Public/Find-IPv4Address.ps1
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<# .SYNOPSIS Returns all valid IPv4 Address in a string. .DESCRIPTION Find-IPv4Address will search a block of text for IPv4 Addresses and returns only the IPv4 Addresses found. .PARAMETER Text The block of text to discover IPv4 Addresses .EXAMPLE Find-IPv4Address -Text 'Mary had little lamb 192.168.1.1 who fleece was white as snow, 127.0.0.1.' 192.168.1.1 127.0.0.1 .EXAMPLE cat /var/log/fail2ban.log | Find-IPv4Address | Sort-Object -Property @{Expression = { $_ -as [System.Version] } } -Unique 2.90.110.124 14.184.248.97 14.186.84.158 27.147.226.173 37.144.205.31 39.59.34.40 41.228.238.217 ... .NOTES The body of text provided to the Text parameter can be multi-line. The function will only return valid IPv4 Addresses from 0.0.0.0 to 255.255.255.255. .LINK http://www.github.com/roberttoups/IPv4Toolbox #> function Find-IPv4Address { [CmdletBinding()] [OutputType([String[]])] param ( # The block of text to find IPv4Addresses in. [Parameter( Position = 0, Mandatory = $false, ValueFromPipeline = $true, HelpMessage = 'The block of text to find IPv4Addresses in.' )] [String[]] $Text = $null ) begin {} process { $RegularExpression = '^(?:(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]|[0-9])\.){3}(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]|[0-9])$' $Text = $Text -replace '\n', ' ' $Text = $Text -replace ',', ' ' $Data = $Text.Split(' ') foreach($Word in $Data) { while($Word -match '\W$') { $Word = $Word.Substring(0, ($Word.Length - 1)) } while($Word -match '^\W') { $Word = $Word.Substring(1, ($Word.Length - 1)) } if($Word -match $RegularExpression) { $Matches[0] } } } end {} } |