TCP Port listener & echo server

listen-port.ps1

# A stupid TCP Listener
# telnet or netcat to the port
# type something and hit enter
# the typed bytes are echoed by this script

function listen-port ($port) {
    $endpoint = new-object System.Net.IPEndPoint ([system.net.ipaddress]::any, $port)
    $listener = new-object System.Net.Sockets.TcpListener $endpoint
    $listener.start()

    do {
        $client = $listener.AcceptTcpClient() # will block here until connection
        $stream = $client.GetStream();
        $reader = New-Object System.IO.StreamReader $stream
        do {

            $line = $reader.ReadLine()
            write-host $line -fore cyan
        } while ($line -and $line -ne ([char]4))
        $reader.Dispose()
        $stream.Dispose()
        $client.Dispose()
    } while ($line -ne ([char]4))
    $listener.stop()
}

listen-port(8989)