ng the port of the requesting user.
        @type port: L{int}

        @param fileName: The name of the file to be transferred.
        @type fileName: L{bytes}

        @param size: The size of the file to be transferred, which may be C{-1}
            if the size of the file was not specified in the DCC SEND request.
        @type size: L{int}

        @param data: A 3-list of [fileName, address, port].
        @type data: L{list}
        Nr