internal/functions/Get-ArpCache.ps1
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<#
.SYNOPSIS Get ARP cache entries .DESCRIPTION Get ARP cache entries .PARAMETER ComputerName The host name to get the specific entry for .EXAMPLE Get-ArpCache -ComputerName prism.janhendrikpeter.de Get the Prism in your domain... #> function Get-ArpCache { param ( [Parameter()] [string] $ComputerName ) if (-not [string]::IsNullOrWhiteSpace($ComputerName)) { try { $ipAddress = [System.Net.Dns]::GetHostByName($ComputerName).AddressList[0].IPAddressToString } catch { Stop-PSFFunction -EnableException $true -String GetArpCache.DnsLookupFailed -StringValues $ComputerName -Cmdlet $PSCmdlet -Exception $_.Exception } } $cacheText = & (Get-Command -Name arp).Path --% -a $cache = foreach ($entry in ($cacheText | Where-Object {$_ -match '^\s*\d'})) { Write-PSFMessage -String 'GetArpCache.AddingEntry' -StringValues $entry $ip, $mac, $type = $entry.Trim() -split '\s+' [PSCustomObject]@{ IPAddress = $ip MACAddress = ($mac -replace '-',':') Type = $type } } if (-not [string]::IsNullOrWhiteSpace($ipAddress)) { Write-PSFMessage -String 'GetArpCache.Filtering' -StringValues $ipAddress return ($cache | Where-Object IPAddress -eq $ipAddress) } $cache } |