Scripts/Get-AssetInventory4.ps1
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<# .NOTES Original Author: G.A.F.F. Jakobs Originally Created: August 30, 2014 .LINK https://gallery.technet.microsoft.com/scriptcenter/Fast-asynchronous-ping-IP-d0a5cf0e #> Param( [parameter(Mandatory = $true, Position = 0)] [System.Net.IPAddress]$StartAddress, [parameter(Mandatory = $true, Position = 1)] [System.Net.IPAddress]$EndAddress ) function New-Range ($start, $end) { [byte[]]$BySt = $start.GetAddressBytes() [Array]::Reverse($BySt) [byte[]]$ByEn = $end.GetAddressBytes() [Array]::Reverse($ByEn) $i1 = [System.BitConverter]::ToUInt32($BySt,0) $i2 = [System.BitConverter]::ToUInt32($ByEn,0) for ($x = $i1;$x -le $i2;$x++) { $ip = ([System.Net.IPAddress]$x).GetAddressBytes() [Array]::Reverse($ip) [System.Net.IPAddress]::Parse($($ip -join '.')) } } $IpRange = New-Range $StartAddress $EndAddress $IpTotal = $IpRange.Count Get-Event -SourceIdentifier "ID-Ping*" | Remove-Event Get-EventSubscriber -SourceIdentifier "ID-Ping*" | Unregister-Event $IpRange | ForEach { [string]$VarName = 'Ping_' + $_.Address New-Variable -Name $VarName -Value (New-Object System.Net.NetworkInformation.Ping) Register-ObjectEvent -InputObject (Get-Variable $VarName -ValueOnly) -EventName PingCompleted -SourceIdentifier "ID-$VarName" (Get-Variable $VarName -ValueOnly).SendAsync($_,2000,$VarName) Remove-Variable $VarName } while ($Pending -lt $IpTotal) { Wait-Event -SourceIdentifier "ID-Ping*" | Out-Null Start-Sleep -Milliseconds 10 $Pending = (Get-Event -SourceIdentifier "ID-Ping*").Count } $Assets = Get-Event -SourceIdentifier "ID-Ping*" | ForEach { if ($_.SourceEventArgs.Reply.Status -eq 'Success') { $Asset = New-Object -TypeName psobject $IpAddress = ($_.SourceEventArgs.Reply).Address.IpAddressToString Unregister-Event $_.SourceIdentifier Remove-Event $_.SourceIdentifier Add-Member -InputObject $Asset -MemberType NoteProperty -Name Address -Value $IpAddress $Client = New-Object Net.Sockets.TcpClient $Client.Connect($IpAddress,135) if ($Client.Connected) { Add-Member -InputObject $Asset -MemberType NoteProperty -Name OperatingSystem -Value 'Windows' } else { Add-Member -InputObject $Asset -MemberType NoteProperty -Name OperatingSystem -Value '-' } $Client.Close() $Asset } } | Sort-Object { $_.Address -as [Version] } return $Assets <# REFERENCES https://stackoverflow.com/questions/9566052/how-to-check-network-port-access-and-display-useful-message https://adamtheautomator.com/building-asynchronous-powershell-functions/ https://stackoverflow.com/questions/11888342/how-do-i-add-an-event-handler-to-a-net-object-in-powershell https://powershell.org/forums/topic/event-handler-in-powershell/ https://devblogs.microsoft.com/scripting/use-asynchronous-event-handling-in-powershell/ http://www.powershellcookbook.com/recipe/WguS/create-and-respond-to-custom-events #> |