# Copyright (c) 2013 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 collections import dbus import dbus.mainloop.glib import gobject import time from autotest_lib.client.cros import dbus_util class ShillProxyError(Exception): """Exceptions raised by ShillProxy and its children.""" pass class ShillProxyTimeoutError(ShillProxyError): """Timeout exception raised by ShillProxy and its children.""" def __init__(self, desc): super(ShillProxyTimeoutError, self).__init__( 'Timed out waiting for condition %s.' % desc) class ShillProxy(object): """A wrapper around a DBus proxy for shill.""" # Core DBus error names DBUS_ERROR_UNKNOWN_OBJECT = 'org.freedesktop.DBus.Error.UnknownObject' # Shill error names ERROR_ALREADY_CONNECTED = 'org.chromium.flimflam.Error.AlreadyConnected' ERROR_FAILURE = 'org.chromium.flimflam.Error.Failure' ERROR_INCORRECT_PIN = 'org.chromium.flimflam.Error.IncorrectPin' ERROR_IN_PROGRESS = 'org.chromium.flimflam.Error.InProgress' ERROR_NOT_CONNECTED = 'org.chromium.flimflam.Error.NotConnected' ERROR_NOT_SUPPORTED = 'org.chromium.flimflam.Error.NotSupported' ERROR_PIN_BLOCKED = 'org.chromium.flimflam.Error.PinBlocked' DBUS_INTERFACE = 'org.chromium.flimflam' DBUS_SERVICE_UNKNOWN = 'org.freedesktop.DBus.Error.ServiceUnknown' DBUS_TYPE_DEVICE = 'org.chromium.flimflam.Device' DBUS_TYPE_IPCONFIG = 'org.chromium.flimflam.IPConfig' DBUS_TYPE_MANAGER = 'org.chromium.flimflam.Manager' DBUS_TYPE_PROFILE = 'org.chromium.flimflam.Profile' DBUS_TYPE_SERVICE = 'org.chromium.flimflam.Service' ENTRY_FIELD_NAME = 'Name' ENTRY_FIELD_TYPE = 'Type' MANAGER_PROPERTY_ACTIVE_PROFILE = 'ActiveProfile' MANAGER_PROPERTY_DEVICES = 'Devices' MANAGER_PROPERTY_NO_AUTOCONNECT_TECHNOLOGIES = 'NoAutoConnectTechnologies' MANAGER_PROPERTY_ENABLED_TECHNOLOGIES = 'EnabledTechnologies' MANAGER_PROPERTY_PROHIBITED_TECHNOLOGIES = 'ProhibitedTechnologies' MANAGER_PROPERTY_UNINITIALIZED_TECHNOLOGIES = 'UninitializedTechnologies' MANAGER_PROPERTY_PROFILES = 'Profiles' MANAGER_PROPERTY_SERVICES = 'Services' MANAGER_PROPERTY_ALL_SERVICES = 'ServiceCompleteList' MANAGER_PROPERTY_DHCPPROPERTY_HOSTNAME = 'DHCPProperty.Hostname' MANAGER_PROPERTY_DHCPPROPERTY_VENDORCLASS = 'DHCPProperty.VendorClass' MANAGER_PROPERTY_WIFI_GLOBAL_FT_ENABLED = 'WiFi.GlobalFTEnabled' MANAGER_OPTIONAL_PROPERTY_MAP = { MANAGER_PROPERTY_DHCPPROPERTY_HOSTNAME: dbus.String, MANAGER_PROPERTY_DHCPPROPERTY_VENDORCLASS: dbus.String, MANAGER_PROPERTY_WIFI_GLOBAL_FT_ENABLED: dbus.Boolean } PROFILE_PROPERTY_ENTRIES = 'Entries' PROFILE_PROPERTY_NAME = 'Name' OBJECT_TYPE_PROPERTY_MAP = { 'Device': ( DBUS_TYPE_DEVICE, MANAGER_PROPERTY_DEVICES ), 'Profile': ( DBUS_TYPE_PROFILE, MANAGER_PROPERTY_PROFILES ), 'Service': ( DBUS_TYPE_SERVICE, MANAGER_PROPERTY_SERVICES ), 'AnyService': ( DBUS_TYPE_SERVICE, MANAGER_PROPERTY_ALL_SERVICES ) } DEVICE_ENUMERATION_TIMEOUT = 30 DEVICE_ENABLE_DISABLE_TIMEOUT = 60 SERVICE_DISCONNECT_TIMEOUT = 5 SERVICE_PROPERTY_AUTOCONNECT = 'AutoConnect' SERVICE_PROPERTY_DEVICE = 'Device' SERVICE_PROPERTY_GUID = 'GUID' SERVICE_PROPERTY_HEX_SSID = 'WiFi.HexSSID' SERVICE_PROPERTY_HIDDEN = 'WiFi.HiddenSSID' SERVICE_PROPERTY_MODE = 'Mode' SERVICE_PROPERTY_NAME = 'Name' SERVICE_PROPERTY_PASSPHRASE = 'Passphrase' SERVICE_PROPERTY_PROFILE = 'Profile' SERVICE_PROPERTY_SAVE_CREDENTIALS = 'SaveCredentials' SERVICE_PROPERTY_FT_ENABLED = 'WiFi.FTEnabled' # Unless you really care whether a network is WPA (TSN) vs. WPA-2 # (RSN), you should use SERVICE_PROPERTY_SECURITY_CLASS. SERVICE_PROPERTY_SECURITY_RAW = 'Security' SERVICE_PROPERTY_SECURITY_CLASS = 'SecurityClass' SERVICE_PROPERTY_SSID = 'SSID' SERVICE_PROPERTY_STRENGTH = 'Strength' SERVICE_PROPERTY_STATE = 'State' SERVICE_PROPERTY_STATIC_IP_NAMESERVERS = 'StaticIP.NameServers' SERVICE_PROPERTY_TYPE = 'Type' # EAP related properties. SERVICE_PROPERTY_EAP_EAP = 'EAP.EAP' SERVICE_PROPERTY_EAP_INNER_EAP = 'EAP.InnerEAP' SERVICE_PROPERTY_EAP_IDENTITY = 'EAP.Identity' SERVICE_PROPERTY_EAP_PASSWORD = 'EAP.Password' SERVICE_PROPERTY_EAP_CA_CERT_PEM = 'EAP.CACertPEM' SERVICE_PROPERTY_CLIENT_CERT_ID = 'EAP.CertID' SERVICE_PROPERTY_EAP_KEY_MGMT = 'EAP.KeyMgmt' SERVICE_PROPERTY_EAP_PIN = 'EAP.PIN' SERVICE_PROPERTY_PRIVATE_KEY_ID = 'EAP.KeyID' SERVICE_PROPERTY_USE_SYSTEM_CAS = 'EAP.UseSystemCAs' # OpenVPN related properties. SERVICE_PROPERTY_OPENVPN_CA_CERT_PEM = 'OpenVPN.CACertPEM' SERVICE_PROPERTY_OPENVPN_PASSWORD = 'OpenVPN.Password' SERVICE_PROPERTY_OPENVPN_PKCS11_ID = 'OpenVPN.Pkcs11.ID' SERVICE_PROPERTY_OPENVPN_PKCS11_PIN = 'OpenVPN.Pkcs11.PIN' SERVICE_PROPERTY_OPENVPN_PROVIDER_HOST = 'Provider.Host' SERVICE_PROPERTY_OPENVPN_PROVIDER_TYPE = 'Provider.Type' SERVICE_PROPERTY_OPENVPN_REMOTE_CERT_EKU = 'OpenVPN.RemoteCertEKU' SERVICE_PROPERTY_OPENVPN_USER = 'OpenVPN.User' SERVICE_PROPERTY_OPENVPN_VERB = 'OpenVPN.Verb' SERVICE_PROPERTY_OPENVPN_VERIFY_HASH = 'OpenVPN.VerifyHash' SERVICE_PROPERTY_OPENVPN_VERIFY_X509_NAME = 'OpenVPN.VerifyX509Name' SERVICE_PROPERTY_OPENVPN_VERIFY_X509_TYPE = 'OpenVPN.VerifyX509Type' SERVICE_PROPERTY_OPENVPN_VPN_DOMAIN = 'VPN.Domain' # L2TP VPN related properties. SERVICE_PROPERTY_L2TP_CA_CERT_PEM = 'L2TPIPsec.CACertPEM' SERVICE_PROPERTY_L2TP_CLIENT_CERT_ID = 'L2TPIPsec.ClientCertID' SERVICE_PROPERTY_L2TP_CLIENT_CERT_SLOT = 'L2TPIPsec.ClientCertSlot' SERVICE_PROPERTY_L2TP_PASSWORD = 'L2TPIPsec.Password' SERVICE_PROPERTY_L2TP_PIN = 'L2TPIPsec.PIN' SERVICE_PROPERTY_L2TP_PSK = 'L2TPIPsec.PSK' SERVICE_PROPERTY_L2TP_USER = 'L2TPIPsec.User' SERVICE_PROPERTY_L2TP_XAUTH_PASSWORD = 'L2TPIPsec.XauthPassword' SERVICE_PROPERTY_L2TP_XAUTH_USER = 'L2TPIPsec.XauthUser' # Mapping of service property to its dbus type. SERVICE_PROPERTY_MAP = { SERVICE_PROPERTY_AUTOCONNECT: dbus.Boolean, SERVICE_PROPERTY_DEVICE: dbus.ObjectPath, SERVICE_PROPERTY_GUID: dbus.String, SERVICE_PROPERTY_HEX_SSID: dbus.String, SERVICE_PROPERTY_HIDDEN: dbus.Boolean, SERVICE_PROPERTY_MODE: dbus.String, SERVICE_PROPERTY_NAME: dbus.String, SERVICE_PROPERTY_PASSPHRASE: dbus.String, SERVICE_PROPERTY_PROFILE: dbus.ObjectPath, SERVICE_PROPERTY_SAVE_CREDENTIALS: dbus.Boolean, SERVICE_PROPERTY_SECURITY_RAW: dbus.String, SERVICE_PROPERTY_SECURITY_CLASS: dbus.String, SERVICE_PROPERTY_SSID: dbus.String, SERVICE_PROPERTY_STRENGTH: dbus.Byte, SERVICE_PROPERTY_STATE: dbus.String, SERVICE_PROPERTY_TYPE: dbus.String, SERVICE_PROPERTY_FT_ENABLED: dbus.Boolean, SERVICE_PROPERTY_STATIC_IP_NAMESERVERS: dbus.String, SERVICE_PROPERTY_EAP_EAP: dbus.String, SERVICE_PROPERTY_EAP_INNER_EAP: dbus.String, SERVICE_PROPERTY_EAP_IDENTITY: dbus.String, SERVICE_PROPERTY_EAP_PASSWORD: dbus.String, SERVICE_PROPERTY_EAP_CA_CERT_PEM: dbus.Array, SERVICE_PROPERTY_CLIENT_CERT_ID: dbus.String, SERVICE_PROPERTY_EAP_KEY_MGMT: dbus.String, SERVICE_PROPERTY_EAP_PIN: dbus.String, SERVICE_PROPERTY_PRIVATE_KEY_ID: dbus.String, SERVICE_PROPERTY_USE_SYSTEM_CAS: dbus.Boolean, SERVICE_PROPERTY_OPENVPN_CA_CERT_PEM: dbus.Array, SERVICE_PROPERTY_OPENVPN_PASSWORD: dbus.String, SERVICE_PROPERTY_OPENVPN_PKCS11_ID: dbus.String, SERVICE_PROPERTY_OPENVPN_PKCS11_PIN: dbus.String, SERVICE_PROPERTY_OPENVPN_PROVIDER_HOST: dbus.String, SERVICE_PROPERTY_OPENVPN_PROVIDER_TYPE: dbus.String, SERVICE_PROPERTY_OPENVPN_REMOTE_CERT_EKU: dbus.String, SERVICE_PROPERTY_OPENVPN_USER: dbus.String, SERVICE_PROPERTY_OPENVPN_VERB: dbus.String, SERVICE_PROPERTY_OPENVPN_VERIFY_HASH: dbus.String, SERVICE_PROPERTY_OPENVPN_VERIFY_X509_NAME: dbus.String, SERVICE_PROPERTY_OPENVPN_VERIFY_X509_TYPE: dbus.String, SERVICE_PROPERTY_OPENVPN_VPN_DOMAIN: dbus.String, SERVICE_PROPERTY_L2TP_CA_CERT_PEM: dbus.Array, SERVICE_PROPERTY_L2TP_CLIENT_CERT_ID: dbus.String, SERVICE_PROPERTY_L2TP_CLIENT_CERT_SLOT: dbus.String, SERVICE_PROPERTY_L2TP_PASSWORD: dbus.String, SERVICE_PROPERTY_L2TP_PIN: dbus.String, SERVICE_PROPERTY_L2TP_PSK: dbus.String, SERVICE_PROPERTY_L2TP_USER: dbus.String, SERVICE_PROPERTY_L2TP_XAUTH_PASSWORD: dbus.String, SERVICE_PROPERTY_L2TP_XAUTH_USER: dbus.String } SERVICE_CONNECTED_STATES = ['portal', 'online'] SUPPORTED_WIFI_STATION_TYPES = {'managed': 'managed', 'ibss': 'adhoc', None: 'managed'} DEVICE_PROPERTY_ADDRESS = 'Address' DEVICE_PROPERTY_EAP_AUTHENTICATION_COMPLETED = 'EapAuthenticationCompleted' DEVICE_PROPERTY_EAP_AUTHENTICATOR_DETECTED = 'EapAuthenticatorDetected' DEVICE_PROPERTY_IP_CONFIG = 'IpConfig' DEVICE_PROPERTY_INTERFACE = 'Interface' DEVICE_PROPERTY_NAME = 'Name' DEVICE_PROPERTY_POWERED = 'Powered' DEVICE_PROPERTY_RECEIVE_BYTE_COUNT = 'ReceiveByteCount' DEVICE_PROPERTY_SCANNING = 'Scanning' DEVICE_PROPERTY_TRANSMIT_BYTE_COUNT = 'TransmitByteCount' DEVICE_PROPERTY_TYPE = 'Type' TECHNOLOGY_CELLULAR = 'cellular' TECHNOLOGY_ETHERNET = 'ethernet' TECHNOLOGY_VPN = 'vpn' TECHNOLOGY_WIFI = 'wifi' TECHNOLOGY_WIMAX = 'wimax' VALUE_POWERED_ON = True VALUE_POWERED_OFF = False POLLING_INTERVAL_SECONDS = 0.2 # Default log level used in connectivity tests. LOG_LEVEL_FOR_TEST = -4 # Default log scopes used in connectivity tests. LOG_SCOPES_FOR_TEST_COMMON = [ 'connection', 'dbus', 'device', 'link', 'manager', 'portal', 'service' ] # Default log scopes used in connectivity tests for specific technologies. LOG_SCOPES_FOR_TEST = { TECHNOLOGY_CELLULAR: LOG_SCOPES_FOR_TEST_COMMON + ['cellular'], TECHNOLOGY_ETHERNET: LOG_SCOPES_FOR_TEST_COMMON + ['ethernet'], TECHNOLOGY_VPN: LOG_SCOPES_FOR_TEST_COMMON + ['vpn'], TECHNOLOGY_WIFI: LOG_SCOPES_FOR_TEST_COMMON + ['wifi'], TECHNOLOGY_WIMAX: LOG_SCOPES_FOR_TEST_COMMON + ['wimax'] } UNKNOWN_METHOD = 'org.freedesktop.DBus.Error.UnknownMethod' @staticmethod def str2dbus(dbus_class, value): """Typecast string property values to dbus types. This mostly makes it easy to special case Boolean constructors to interpret strings like 'false' and '0' as False. @param dbus_class: DBus class object. @param value: value to pass to constructor. """ if isinstance(dbus_class, dbus.Boolean): return dbus_class(value.lower() in ('true','1')) else: return dbus_class(value) @staticmethod def service_properties_to_dbus_types(in_dict): """Convert service properties to dbus types. @param in_dict: Dictionary containing service properties. @return DBus variant dictionary containing service properties. """ dbus_dict = {} for key, value in in_dict.iteritems(): if key not in ShillProxy.SERVICE_PROPERTY_MAP: raise ShillProxyError('Unsupported property %s' % (key)) dbus_dict[key] = ShillProxy.SERVICE_PROPERTY_MAP[key]( value, variant_level=1) return dbus_dict @classmethod def dbus2primitive(cls, value): """Typecast values from dbus types to python types. @param value: dbus object to convert to a primitive. """ return dbus_util.dbus2primitive(value) @staticmethod def get_dbus_property(interface, property_key): """get property on a dbus Interface @param interface dbus Interface to receive new setting @param property_key string name of property on interface @return python typed object representing property value or None """ properties = interface.GetProperties(utf8_strings=True) if property_key in properties: return ShillProxy.dbus2primitive(properties[property_key]) else: return None @staticmethod def set_dbus_property(interface, property_key, value): """set property on a dbus Interface @param interface dbus Interface to receive new setting @param property_key string name of property on interface @param value string value to set for property on interface from string """ properties = interface.GetProperties(utf8_strings=True) if property_key not in properties: raise ShillProxyError('No property %s found in %s' % (property_key, interface.object_path)) else: dbus_class = properties[property_key].__class__ interface.SetProperty(property_key, ShillProxy.str2dbus(dbus_class, value)) @staticmethod def set_optional_dbus_property(interface, property_key, value): """set an optional property on a dbus Interface. This method can be used for properties that are optionally listed in the profile. It skips the initial check of the property being in the interface.GetProperties list. @param interface dbus Interface to receive new setting @param property_key string name of property on interface @param value string value to set for property on interface from string """ if property_key not in ShillProxy.MANAGER_OPTIONAL_PROPERTY_MAP: raise ShillProxyError('Unsupported property %s' % (property_key)) else: dbus_class = ShillProxy.MANAGER_OPTIONAL_PROPERTY_MAP[property_key] interface.SetProperty(property_key, ShillProxy.str2dbus(dbus_class, value)) @classmethod def get_proxy(cls, bus=None, timeout_seconds=10): """Create a Proxy, retrying if necessary. This method creates a proxy object of the required subclass of ShillProxy. A call to SomeSubclassOfShillProxy.get_proxy() will return an object of type SomeSubclassOfShillProxy. Connects to shill over D-Bus. If shill is not yet running, retry until it is, or until |timeout_seconds| expires. After connecting to shill, this method will verify that shill is answering RPCs. No timeout is applied to the test RPC, so this method _may_ block indefinitely. @param bus D-Bus bus to use, or specify None and this object will create a mainloop and bus. @param timeout_seconds float number of seconds to try connecting A value <= 0 will cause the method to return immediately, without trying to connect. @return a ShillProxy instance if we connected, or None otherwise """ end_time = time.time() + timeout_seconds connection = None while connection is None and time.time() < end_time: try: # We create instance of class on which this classmethod was # called. This way, calling SubclassOfShillProxy.get_proxy() # will get a proxy of the right type. connection = cls(bus=bus) except dbus.exceptions.DBusException as e: if e.get_dbus_name() != ShillProxy.DBUS_SERVICE_UNKNOWN: raise ShillProxyError('Error connecting to shill') else: # Wait a moment before retrying time.sleep(ShillProxy.POLLING_INTERVAL_SECONDS) if connection is None: return None # Although shill is connected to D-Bus at this point, it may # not have completed initialization just yet. Call into shill, # and wait for the response, to make sure that it is truly up # and running. (Shill will not service D-Bus requests until # initialization is complete.) connection.get_profiles() return connection def __init__(self, bus=None): if bus is None: dbus.mainloop.glib.DBusGMainLoop(set_as_default=True) bus = dbus.SystemBus() self._bus = bus self._manager = self.get_dbus_object(self.DBUS_TYPE_MANAGER, '/') def configure_service_by_guid(self, guid, properties={}): """Configure a service identified by its GUID. @param guid string unique identifier of service. @param properties dictionary of service property:value pairs. """ config = properties.copy() config[self.SERVICE_PROPERTY_GUID] = guid self.configure_service(config) def configure_service(self, config): """Configure a service with given properties. @param config dictionary of service property:value pairs. """ # Convert configuration values to dbus variant typed values. dbus_config = ShillProxy.service_properties_to_dbus_types(config) self.manager.ConfigureService(dbus_config) def configure_service_for_profile(self, path, config): """Configure a service in the given profile with given properties. @param path string path of profile for which service should be configured. @param config dictionary of service property:value pairs. """ # Convert configuration values to dbus variant typed values. dbus_config = ShillProxy.service_properties_to_dbus_types(config) self.manager.ConfigureServiceForProfile(dbus.ObjectPath(path), dbus_config) def set_logging(self, level, scopes): """Set the logging in shill to the specified |level| and |scopes|. @param level int log level to set to in shill. @param scopes list of strings of log scopes to set to in shill. """ self.manager.SetDebugLevel(level) self.manager.SetDebugTags('+'.join(scopes)) def set_logging_for_test(self, technology): """Set the logging in shill for a test of the specified |technology|. Set the log level to |LOG_LEVEL_FOR_TEST| and the log scopes to the ones defined in |LOG_SCOPES_FOR_TEST| for |technology|. If |technology| is not found in |LOG_SCOPES_FOR_TEST|, the log scopes are set to |LOG_SCOPES_FOR_TEST_COMMON|. @param technology string representing the technology type of a test that the logging in shill is to be customized for. """ scopes = self.LOG_SCOPES_FOR_TEST.get(technology, self.LOG_SCOPES_FOR_TEST_COMMON) self.set_logging(self.LOG_LEVEL_FOR_TEST, scopes) def wait_for_property_in(self, dbus_object, property_name, expected_values, timeout_seconds): """Wait till a property is in a list of expected values. Block until the property |property_name| in |dbus_object| is in |expected_values|, or |timeout_seconds|. @param dbus_object DBus proxy object as returned by self.get_dbus_object. @param property_name string property key in dbus_object. @param expected_values iterable set of values to return successfully upon seeing. @param timeout_seconds float number of seconds to return if we haven't seen the appropriate property value in time. @return tuple(successful, final_value, duration) where successful is True iff we saw one of |expected_values| for |property_name|, final_value is the member of |expected_values| we saw, and duration is how long we waited to see that value. """ start_time = time.time() duration = lambda: time.time() - start_time update_queue = collections.deque() signal_receiver = lambda key, value: update_queue.append((key, value)) receiver_ref = self._bus.add_signal_receiver( signal_receiver, signal_name='PropertyChanged', dbus_interface=dbus_object.dbus_interface, path=dbus_object.object_path) try: # Check to make sure we're not already in a target state. try: properties = self.dbus2primitive( dbus_object.GetProperties(utf8_strings=True)) last_value = properties.get(property_name, '(no value found)') if last_value in expected_values: return True, last_value, duration() except dbus.exceptions.DBusException: return False, '(object reference became invalid)', duration() context = gobject.MainLoop().get_context() while duration() < timeout_seconds: # Dispatch all pending events. while context.iteration(False): pass while update_queue: updated_property, value = map(self.dbus2primitive, update_queue.popleft()) if property_name != updated_property: continue last_value = value if not last_value in expected_values: continue return True, last_value, duration() time.sleep(0.2) # Give that CPU a break. CPUs love breaks. finally: receiver_ref.remove() return False, last_value, duration() @property def manager(self): """ @return DBus proxy object representing the shill Manager. """ return self._manager def get_active_profile(self): """Get the active profile in shill. @return dbus object representing the active profile. """ properties = self.manager.GetProperties(utf8_strings=True) return self.get_dbus_object( self.DBUS_TYPE_PROFILE, properties[self.MANAGER_PROPERTY_ACTIVE_PROFILE]) def get_dbus_object(self, type_str, path): """Return the DBus object of type |type_str| at |path| in shill. @param type_str string (e.g. self.DBUS_TYPE_SERVICE). @param path path to object in shill (e.g. '/service/12'). @return DBus proxy object. """ return dbus.Interface( self._bus.get_object(self.DBUS_INTERFACE, path), type_str) def get_devices(self): """Return the list of devices as dbus Interface objects""" properties = self.manager.GetProperties(utf8_strings=True) return [self.get_dbus_object(self.DBUS_TYPE_DEVICE, path) for path in properties[self.MANAGER_PROPERTY_DEVICES]] def get_profiles(self): """Return the list of profiles as dbus Interface objects""" properties = self.manager.GetProperties(utf8_strings=True) return [self.get_dbus_object(self.DBUS_TYPE_PROFILE, path) for path in properties[self.MANAGER_PROPERTY_PROFILES]] def get_service(self, params): """ Get the shill service that matches |params|. @param params dict of strings understood by shill to describe a service. @return DBus object interface representing a service. """ dbus_params = self.service_properties_to_dbus_types(params) path = self.manager.GetService(dbus_params) return self.get_dbus_object(self.DBUS_TYPE_SERVICE, path) def get_service_for_device(self, device): """Attempt to find a service that manages |device|. @param device a dbus object interface representing a device. @return Dbus object interface representing a service if found. None otherwise. """ properties = self.manager.GetProperties(utf8_strings=True) all_services = properties.get(self.MANAGER_PROPERTY_ALL_SERVICES, None) if not all_services: return None for service_path in all_services: service = self.get_dbus_object(self.DBUS_TYPE_SERVICE, service_path) properties = service.GetProperties(utf8_strings=True) device_path = properties.get(self.SERVICE_PROPERTY_DEVICE, None) if device_path == device.object_path: return service return None def find_object(self, object_type, properties): """Find a shill object with the specified type and properties. Return the first shill object of |object_type| whose properties match all that of |properties|. @param object_type string representing the type of object to be returned. Valid values are those object types defined in |OBJECT_TYPE_PROPERTY_MAP|. @param properties dict of strings understood by shill to describe a service. @return DBus object interface representing the object found or None if no matching object is found. """ if object_type not in self.OBJECT_TYPE_PROPERTY_MAP: return None dbus_type, manager_property = self.OBJECT_TYPE_PROPERTY_MAP[object_type] manager_properties = self.manager.GetProperties(utf8_strings=True) for path in manager_properties[manager_property]: try: test_object = self.get_dbus_object(dbus_type, path) object_properties = test_object.GetProperties(utf8_strings=True) for name, value in properties.iteritems(): if (name not in object_properties or self.dbus2primitive(object_properties[name]) != value): break else: return test_object except dbus.exceptions.DBusException, e: # This could happen if for instance, you're enumerating services # and test_object was removed in shill between the call to get # the manager properties and the call to get the service # properties. This causes failed method invocations. continue return None def find_matching_service(self, properties): """Find a service object that matches the given properties. This re-implements the manager DBus method FindMatchingService. The advantage of doing this here is that FindMatchingServices does not exist on older images, which will cause tests to fail. @param properties dict of strings understood by shill to describe a service. """ return self.find_object('Service', properties) def connect_service_synchronous(self, service, timeout_seconds): """Connect a service and wait for its state to become connected. @param service DBus service object to connect. @param timeout_seconds number of seconds to wait for service to go enter a connected state. @return True if the service connected successfully. """ try: service.Connect() except dbus.exceptions.DBusException as e: if e.get_dbus_name() != self.ERROR_ALREADY_CONNECTED: raise e success, _, _ = self.wait_for_property_in( service, self.SERVICE_PROPERTY_STATE, self.SERVICE_CONNECTED_STATES, timeout_seconds=timeout_seconds) return success def disconnect_service_synchronous(self, service, timeout_seconds): """Disconnect a service and wait for its state to go idle. @param service DBus service object to disconnect. @param timeout_seconds number of seconds to wait for service to go idle. @return True if the service disconnected successfully. """ try: service.Disconnect() except dbus.exceptions.DBusException as e: if e.get_dbus_name() not in [self.ERROR_IN_PROGRESS, self.ERROR_NOT_CONNECTED]: raise e success, _, _ = self.wait_for_property_in( service, self.SERVICE_PROPERTY_STATE, ['idle'], timeout_seconds=timeout_seconds) return success