net/listen

    cfunction

    (net/listen host port &opt type)

    Creates a server. Returns a new stream that is neither readable nor
    writeable. Use net/accept or net/accept-loop be to handle connections
    and start the server. The type parameter specifies the type of
    network connection, either a :stream (usually tcp), or :datagram
    (usually udp). If not specified, the default is :stream. The host and
    port arguments are the same as in net/address.