client/cros/cellular/mbim_compliance/tests/cm_08.py

# Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

"""
CM_08 Validation of InformationBuffer in Case of a Failure in MBIM_COMMAND_MSG

Reference:
    [1] Universal Serial Bus Communication Class MBIM Compliance Testing: 40
        http://www.usb.org/developers/docs/devclass_docs/MBIM-Compliance-1.0.pdf
"""
import array
import struct

import common
from autotest_lib.client.cros.cellular.mbim_compliance import mbim_channel
from autotest_lib.client.cros.cellular.mbim_compliance import mbim_constants
from autotest_lib.client.cros.cellular.mbim_compliance import mbim_control
from autotest_lib.client.cros.cellular.mbim_compliance import mbim_errors
from autotest_lib.client.cros.cellular.mbim_compliance.sequences \
        import mbim_open_generic_sequence
from autotest_lib.client.cros.cellular.mbim_compliance.tests import test


class CM08Test(test.Test):
    """ Implement the CM_08 test. """

    def run_internal(self):
        """ Run CM_08 test. """
        # Precondition
        mbim_open_generic_sequence.MBIMOpenGenericSequence(
                self.test_context).run()

        # Step 1
        command_message = mbim_control.MBIMCommandMessage(
                message_length=52,
                total_fragments=1,
                current_fragment=0,
                device_service_id=mbim_constants.UUID_BASIC_CONNECT.bytes,
                cid=mbim_constants.MBIM_CID_RADIO_STATE,
                command_type=mbim_constants.COMMAND_TYPE_SET,
                information_buffer_length=4,
                information_buffer=array.array('B', struct.pack('I', 2)))
        packets = command_message.generate_packets()
        channel = mbim_channel.MBIMChannel(
                {'idVendor': self.test_context.id_vendor,
                 'idProduct': self.test_context.id_product},
                self.test_context.mbim_communication_interface.bInterfaceNumber,
                self.test_context.interrupt_endpoint.bEndpointAddress,
                self.test_context.mbim_functional.wMaxControlMessage)
        response_packets = channel.bidirectional_transaction(*packets)
        channel.close()

        # Step 2
        response_message = mbim_control.parse_response_packets(response_packets)

        # Step 3
        if ((response_message.message_type !=
             mbim_constants.MBIM_COMMAND_DONE) or
            (response_message.status_codes ==
             mbim_constants.MBIM_STATUS_SUCCESS) or
            response_message.information_buffer_length != 0):
            mbim_errors.log_and_raise(mbim_errors.MBIMComplianceAssertionError,
                                      'mbim1.0:9.4.5#3')