コード例 #1
0
ファイル: rtu.py プロジェクト: AdvancedClimateSystems/uModbus
    def process(self, request_adu):
        """ Process request ADU and return response.

        :param request_adu: A bytearray containing the ADU request.
        :return: A bytearray containing the response of the ADU request.
        """
        validate_crc(request_adu)
        return super(RTUServer, self).process(request_adu)
コード例 #2
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    def process(self, request_adu):
        """ Process request ADU and return response.

        :param request_adu: A bytearray containing the ADU request.
        :return: A bytearray containing the response of the ADU request.
        """
        validate_crc(request_adu)
        return super(RTUServer, self).process(request_adu)
コード例 #3
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def get_frame(adu):
    frame = adu[:2]
    i = 2
    while 1:
        try:
            validate_crc(frame)
            break
        except (CRCError, struct.error) as e:
            frame += adu[i:i + 1]
        i += 1
    return frame
コード例 #4
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def test_request_returning_server_device_failure_error(rtu_server, function):
    """ Validate response PDU of request returning excepetion response with
    error code 4.
    """
    adu = function()

    function_code = struct.unpack('>B', adu[1:2])[0]

    rtu_server.serial_port.write(adu)
    rtu_server.serve_once()
    resp = rtu_server.serial_port.read(rtu_server.serial_port.in_waiting)

    validate_crc(resp)
    assert struct.unpack('>BB', resp[1:-2]) == (0x80 + function_code, 4)
コード例 #5
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def test_request_returning_invalid_data_value_error(rtu_server, function_code,
                                                    quantity):
    """ Validate response PDU of request returning excepetion response with
    error code 3.
    """
    starting_address = 0
    slave_id = 1
    adu = add_crc(struct.pack('>BBHH', slave_id, function_code,
                              starting_address, quantity))

    rtu_server.serial_port.write(adu)
    rtu_server.serve_once()
    resp = rtu_server.serial_port.read(rtu_server.serial_port.in_waiting)

    validate_crc(resp)
    assert struct.unpack('>BB', resp[1:-2]) == (0x80 + function_code, 3)
コード例 #6
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def parse_response_adu(resp_adu, req_adu=None):
    """ Parse response ADU and return response data. Some functions require
    request ADU to fully understand request ADU.

    :param resp_adu: Resonse ADU.
    :param req_adu: Request ADU, default None.
    :return: Response data.
    """
    resp_pdu = resp_adu[1:-2]
    validate_crc(resp_adu)

    req_pdu = None

    if req_adu is not None:
        req_pdu = req_adu[1:-2]

    function = create_function_from_response_pdu(resp_pdu, req_pdu)

    return function.data
コード例 #7
0
ファイル: rtu.py プロジェクト: AdvancedClimateSystems/uModbus
def parse_response_adu(resp_adu, req_adu=None):
    """ Parse response ADU and return response data. Some functions require
    request ADU to fully understand request ADU.

    :param resp_adu: Resonse ADU.
    :param req_adu: Request ADU, default None.
    :return: Response data.
    """
    resp_pdu = resp_adu[1:-2]
    validate_crc(resp_adu)

    req_pdu = None

    if req_adu is not None:
        req_pdu = req_adu[1:-2]

    function = create_function_from_response_pdu(resp_pdu, req_pdu)

    return function.data
コード例 #8
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def parse_response_adu(resp_adu, req_adu=None):
    """ Parse response ADU and return response data. Some functions require
    request ADU to fully understand request ADU.

    :param resp_adu: Resonse ADU.
    :param req_adu: Request ADU, default None.
    :return: Response data.
    """
    aes = AES.new(key, AES.MODE_CBC, IV)
    resp_pdu = aes.decrypt(resp_adu[1:-2])

    validate_crc(resp_adu)

    req_pdu = None

    if req_adu is not None:
        req_pdu = req_adu[1:-2]

    aes = AES.new(key, AES.MODE_CBC, IV)
    req_pdu = aes.decrypt(req_pdu)

    function = create_function_from_response_pdu(resp_pdu, req_pdu)

    return function.data
コード例 #9
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def test_validate_invalid_crc():
    """" Method should raise assertion error. """
    with pytest.raises(CRCError):
        validate_crc(b'\x01\x02\x07')
コード例 #10
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def test_validate_valid_crc():
    """" Method should not raise assertion error. """
    validate_crc(b'\x00\x01\x02\xf1\x91')