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      1 # Copyright 2014 The Chromium OS Authors. All rights reserved.
      2 # Use of this source code is governed by a BSD-style license that can be
      3 # found in the LICENSE file.
      4 
      5 import common
      6 from autotest_lib.client.cros.cellular.mbim_compliance import mbim_constants
      7 from autotest_lib.client.cros.cellular.mbim_compliance import mbim_errors
      8 from autotest_lib.client.cros.cellular.mbim_compliance import mbim_test_base
      9 from autotest_lib.client.cros.cellular.mbim_compliance.sequences \
     10         import connect_sequence
     11 from autotest_lib.client.cros.cellular.mbim_compliance.sequences \
     12         import get_descriptors_sequence
     13 from autotest_lib.client.cros.cellular.mbim_compliance.sequences \
     14         import mbim_open_generic_sequence
     15 
     16 
     17 class cellular_MbimComplianceERR01(mbim_test_base.MbimTestBase):
     18     """
     19     Validation of function's response to messages with variable-length encoding
     20     errors.
     21 
     22     This test verifies that incoming messages are rejected when variable-length
     23     encoding rules are not followed.
     24 
     25     Reference:
     26         [1] Universal Serial Bus Communication Class MBIM Compliance Testing: 45
     27         http://www.usb.org/developers/docs/devclass_docs/MBIM-Compliance-1.0.pdf
     28 
     29     """
     30     version = 1
     31 
     32     def run_internal(self):
     33         """ Run ERR_01 test. """
     34         # Precondition
     35         descriptors = get_descriptors_sequence.GetDescriptorsSequence(
     36                 self.device_context).run()
     37         self.device_context.update_descriptor_cache(descriptors)
     38         open_sequence = mbim_open_generic_sequence.MBIMOpenGenericSequence(
     39                 self.device_context)
     40         open_sequence.run()
     41 
     42         # Step 1
     43         request_message, response_message, _ = (
     44                 connect_sequence.ConnectSequence(self.device_context).run(
     45                         introduce_error_in_access_offset=True,
     46                         raise_exception_on_failure=False))
     47 
     48         # Step 2
     49         if ((response_message.transaction_id !=
     50              request_message.transaction_id) or
     51             (response_message.device_service_id !=
     52              request_message.device_service_id) or
     53             (response_message.cid != request_message.cid)):
     54             mbim_errors.log_and_raise(
     55                     mbim_errors.MBIMComplianceTestError,
     56                     'Mismatch in request/response message params: '
     57                     '(transaction_id, service_id, cid). '
     58                     'Request Message: (%s, %s, %s), '
     59                     'Response Message: (%s, %s, %s)' % (
     60                         request_message.transaction_id,
     61                         request_message.device_service_id,
     62                         request_message.cid,
     63                         response_message.transaction_id,
     64                         response_message.device_service_id,
     65                         response_message.cid))
     66 
     67         # Step 3
     68         if ((response_message.message_type !=
     69              mbim_constants.MBIM_COMMAND_DONE) or
     70             (response_message.status_codes !=
     71              mbim_constants.MBIM_STATUS_INVALID_PARAMETERS)):
     72             mbim_errors.log_and_raise(mbim_errors.MBIMComplianceAssertionError,
     73                                       'mbim1.0:10.3#2')
     74