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1# Copyright (c) 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"""
6CM_08 Validation of InformationBuffer in Case of a Failure in MBIM_COMMAND_MSG
7
8Reference:
9    [1] Universal Serial Bus Communication Class MBIM Compliance Testing: 40
10        http://www.usb.org/developers/docs/devclass_docs/MBIM-Compliance-1.0.pdf
11"""
12import array
13import struct
14
15import common
16from autotest_lib.client.cros.cellular.mbim_compliance import mbim_channel
17from autotest_lib.client.cros.cellular.mbim_compliance import mbim_constants
18from autotest_lib.client.cros.cellular.mbim_compliance import mbim_control
19from autotest_lib.client.cros.cellular.mbim_compliance import mbim_errors
20from autotest_lib.client.cros.cellular.mbim_compliance.sequences \
21        import mbim_open_generic_sequence
22from autotest_lib.client.cros.cellular.mbim_compliance.tests import test
23
24
25class CM08Test(test.Test):
26    """ Implement the CM_08 test. """
27
28    def run_internal(self):
29        """ Run CM_08 test. """
30        # Precondition
31        mbim_open_generic_sequence.MBIMOpenGenericSequence(
32                self.test_context).run()
33
34        # Step 1
35        command_message = mbim_control.MBIMCommandMessage(
36                message_length=52,
37                total_fragments=1,
38                current_fragment=0,
39                device_service_id=mbim_constants.UUID_BASIC_CONNECT.bytes,
40                cid=mbim_constants.MBIM_CID_RADIO_STATE,
41                command_type=mbim_constants.COMMAND_TYPE_SET,
42                information_buffer_length=4,
43                information_buffer=array.array('B', struct.pack('I', 2)))
44        packets = command_message.generate_packets()
45        channel = mbim_channel.MBIMChannel(
46                {'idVendor': self.test_context.id_vendor,
47                 'idProduct': self.test_context.id_product},
48                self.test_context.mbim_communication_interface.bInterfaceNumber,
49                self.test_context.interrupt_endpoint.bEndpointAddress,
50                self.test_context.mbim_functional.wMaxControlMessage)
51        response_packets = channel.bidirectional_transaction(*packets)
52        channel.close()
53
54        # Step 2
55        response_message = mbim_control.parse_response_packets(response_packets)
56
57        # Step 3
58        if ((response_message.message_type !=
59             mbim_constants.MBIM_COMMAND_DONE) or
60            (response_message.status_codes ==
61             mbim_constants.MBIM_STATUS_SUCCESS) or
62            response_message.information_buffer_length != 0):
63            mbim_errors.log_and_raise(mbim_errors.MBIMComplianceAssertionError,
64                                      'mbim1.0:9.4.5#3')
65