# 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. import contextlib import dbus import logging import sys import traceback import common from autotest_lib.client.bin import utils from autotest_lib.client.common_lib import error from autotest_lib.client.cros import backchannel from autotest_lib.client.cros import upstart from autotest_lib.client.cros.cellular import mm from autotest_lib.client.cros.cellular.pseudomodem import pseudomodem_context from autotest_lib.client.cros.networking import cellular_proxy from autotest_lib.client.cros.networking import shill_context from autotest_lib.client.cros.networking import shill_proxy class CellularTestEnvironment(object): """Setup and verify cellular test environment. This context manager configures the following: - Sets up backchannel. - Shuts down other devices except cellular. - Shill and MM logging is enabled appropriately for cellular. - Initializes members that tests should use to access test environment (eg. |shill|, |modem_manager|, |modem|). - modemfwd is stopped to prevent the modem from rebooting underneath us. Then it verifies the following is valid: - The backchannel is using an Ethernet device. - The SIM is inserted and valid. - There is one and only one modem in the device. - The modem is registered to the network. - There is a cellular service in shill and it's not connected. Don't use this base class directly, use the appropriate subclass. Setup for over-the-air tests: with CellularOTATestEnvironment() as test_env: # Test body Setup for pseudomodem tests: with CellularPseudoMMTestEnvironment( pseudomm_args=({'family': '3GPP'})) as test_env: # Test body """ def __init__(self, use_backchannel=True, shutdown_other_devices=True, modem_pattern='', skip_modem_reset=False): """ @param use_backchannel: Set up the backchannel that can be used to communicate with the DUT. @param shutdown_other_devices: If True, shutdown all devices except cellular. @param modem_pattern: Search string used when looking for the modem. """ # Tests should use this main loop instead of creating their own. self.mainloop = dbus.mainloop.glib.DBusGMainLoop(set_as_default=True) self.bus = dbus.SystemBus(mainloop=self.mainloop) self.shill = None self.modem_manager = None self.modem = None self.modem_path = None self._backchannel = None self._modem_pattern = modem_pattern self._skip_modem_reset = skip_modem_reset self._nested = None self._context_managers = [] if use_backchannel: self._backchannel = backchannel.Backchannel() self._context_managers.append(self._backchannel) if shutdown_other_devices: self._context_managers.append( shill_context.AllowedTechnologiesContext( [shill_proxy.ShillProxy.TECHNOLOGY_CELLULAR])) @contextlib.contextmanager def _disable_shill_autoconnect(self): self._enable_shill_cellular_autoconnect(False) yield self._enable_shill_cellular_autoconnect(True) def __enter__(self): try: if upstart.has_service('modemfwd') and upstart.is_running('modemfwd'): upstart.stop_job('modemfwd') # Temporarily disable shill autoconnect to cellular service while # the test environment is setup to prevent a race condition # between disconnecting the modem in _verify_cellular_service() # and shill autoconnect. with self._disable_shill_autoconnect(): self._nested = contextlib.nested(*self._context_managers) self._nested.__enter__() self._initialize_shill() # Perform SIM verification now to ensure that we can enable the # modem in _initialize_modem_components(). ModemManager does not # allow enabling a modem without a SIM. self._verify_sim() self._initialize_modem_components() self._setup_logging() self._verify_backchannel() self._wait_for_modem_registration() self._verify_cellular_service() return self except (error.TestError, dbus.DBusException, shill_proxy.ShillProxyError) as e: except_type, except_value, except_traceback = sys.exc_info() lines = traceback.format_exception(except_type, except_value, except_traceback) logging.error('Error during test initialization:\n' + ''.join(lines)) self.__exit__(*sys.exc_info()) raise error.TestError('INIT_ERROR: %s' % str(e)) except: self.__exit__(*sys.exc_info()) raise def __exit__(self, exception, value, traceback): if upstart.has_service('modemfwd'): upstart.restart_job('modemfwd') if self._nested: return self._nested.__exit__(exception, value, traceback) self.shill = None self.modem_manager = None self.modem = None self.modem_path = None def _get_shill_cellular_device_object(self): return utils.poll_for_condition( lambda: self.shill.find_cellular_device_object(), exception=error.TestError('Cannot find cellular device in shill. ' 'Is the modem plugged in?'), timeout=shill_proxy.ShillProxy.DEVICE_ENUMERATION_TIMEOUT) def _enable_modem(self): modem_device = self._get_shill_cellular_device_object() try: modem_device.Enable() except dbus.DBusException as e: if (e.get_dbus_name() != shill_proxy.ShillProxy.ERROR_IN_PROGRESS): raise utils.poll_for_condition( lambda: modem_device.GetProperties()['Powered'], exception=error.TestError( 'Failed to enable modem.'), timeout=shill_proxy.ShillProxy.DEVICE_ENABLE_DISABLE_TIMEOUT) def _enable_shill_cellular_autoconnect(self, enable): shill = cellular_proxy.CellularProxy.get_proxy(self.bus) shill.manager.SetProperty( shill_proxy.ShillProxy. MANAGER_PROPERTY_NO_AUTOCONNECT_TECHNOLOGIES, '' if enable else 'cellular') def _is_unsupported_error(self, e): return (e.get_dbus_name() == shill_proxy.ShillProxy.ERROR_NOT_SUPPORTED or (e.get_dbus_name() == shill_proxy.ShillProxy.ERROR_FAILURE and 'operation not supported' in e.get_dbus_message())) def _reset_modem(self): modem_device = self._get_shill_cellular_device_object() try: # MBIM modems do not support being reset. self.shill.reset_modem(modem_device, expect_service=False) except dbus.DBusException as e: if not self._is_unsupported_error(e): raise def _initialize_shill(self): """Get access to shill.""" # CellularProxy.get_proxy() checks to see if shill is running and # responding to DBus requests. It returns None if that's not the case. self.shill = cellular_proxy.CellularProxy.get_proxy(self.bus) if self.shill is None: raise error.TestError('Cannot connect to shill, is shill running?') def _initialize_modem_components(self): """Reset the modem and get access to modem components.""" # Enable modem first so shill initializes the modemmanager proxies so # we can call reset on it. self._enable_modem() if not self._skip_modem_reset: self._reset_modem() # PickOneModem() makes sure there's a modem manager and that there is # one and only one modem. self.modem_manager, self.modem_path = \ mm.PickOneModem(self._modem_pattern) self.modem = self.modem_manager.GetModem(self.modem_path) if self.modem is None: raise error.TestError('Cannot get modem object at %s.' % self.modem_path) def _setup_logging(self): self.shill.set_logging_for_cellular_test() self.modem_manager.SetDebugLogging() def _verify_sim(self): """Verify SIM is valid. Make sure a SIM in inserted and that it is not locked. @raise error.TestError if SIM does not exist or is locked. """ modem_device = self._get_shill_cellular_device_object() props = modem_device.GetProperties() # No SIM in CDMA modems. family = props[ cellular_proxy.CellularProxy.DEVICE_PROPERTY_TECHNOLOGY_FAMILY] if (family == cellular_proxy.CellularProxy. DEVICE_PROPERTY_TECHNOLOGY_FAMILY_CDMA): return # Make sure there is a SIM. if not props[cellular_proxy.CellularProxy.DEVICE_PROPERTY_SIM_PRESENT]: raise error.TestError('There is no SIM in the modem.') # Make sure SIM is not locked. lock_status = props.get( cellular_proxy.CellularProxy.DEVICE_PROPERTY_SIM_LOCK_STATUS, None) if lock_status is None: raise error.TestError('Failed to read SIM lock status.') locked = lock_status.get( cellular_proxy.CellularProxy.PROPERTY_KEY_SIM_LOCK_ENABLED, None) if locked is None: raise error.TestError('Failed to read SIM LockEnabled status.') elif locked: raise error.TestError( 'SIM is locked, test requires an unlocked SIM.') def _verify_backchannel(self): """Verify backchannel is on an ethernet device. @raise error.TestError if backchannel is not on an ethernet device. """ if self._backchannel is None: return if not self._backchannel.is_using_ethernet(): raise error.TestError('An ethernet connection is required between ' 'the test server and the device under test.') def _wait_for_modem_registration(self): """Wait for the modem to register with the network. @raise error.TestError if modem is not registered. """ utils.poll_for_condition( self.modem.ModemIsRegistered, exception=error.TestError( 'Modem failed to register with the network.'), timeout=cellular_proxy.CellularProxy.SERVICE_REGISTRATION_TIMEOUT) def _verify_cellular_service(self): """Make sure a cellular service exists. The cellular service should not be connected to the network. @raise error.TestError if cellular service does not exist or if there are multiple cellular services. """ service = self.shill.wait_for_cellular_service_object() try: service.Disconnect() except dbus.DBusException as e: if (e.get_dbus_name() != cellular_proxy.CellularProxy.ERROR_NOT_CONNECTED): raise success, state, _ = self.shill.wait_for_property_in( service, cellular_proxy.CellularProxy.SERVICE_PROPERTY_STATE, ('idle',), cellular_proxy.CellularProxy.SERVICE_DISCONNECT_TIMEOUT) if not success: raise error.TestError( 'Cellular service needs to start in the "idle" state. ' 'Current state is "%s". ' 'Modem disconnect may have failed.' % state) class CellularOTATestEnvironment(CellularTestEnvironment): """Setup and verify cellular over-the-air (OTA) test environment. """ def __init__(self, **kwargs): super(CellularOTATestEnvironment, self).__init__(**kwargs) class CellularPseudoMMTestEnvironment(CellularTestEnvironment): """Setup and verify cellular pseudomodem test environment. """ def __init__(self, pseudomm_args=None, **kwargs): """ @param pseudomm_args: Tuple of arguments passed to the pseudomodem, see pseudomodem_context.py for description of each argument in the tuple: (flags_map, block_output, bus) """ kwargs["skip_modem_reset"] = True super(CellularPseudoMMTestEnvironment, self).__init__(**kwargs) self._context_managers.append( pseudomodem_context.PseudoModemManagerContext( True, bus=self.bus, *pseudomm_args))