| # 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 logging |
| import time |
| |
| from autotest_lib.client.common_lib import error |
| from autotest_lib.client.common_lib.cros.network import iw_runner |
| from autotest_lib.client.common_lib.cros.network import ping_runner |
| from autotest_lib.client.common_lib.cros.network import xmlrpc_datatypes |
| from autotest_lib.server import hosts |
| from autotest_lib.server.cros.network import wifi_client |
| from autotest_lib.server.cros.network import netperf_runner |
| |
| WORK_CLIENT_CONNECTION_RETRIES = 3 |
| WAIT_FOR_CONNECTION = 10 |
| |
| class ConnectionWorker(object): |
| """ ConnectionWorker is a thin layer of interfaces for worker classes """ |
| |
| @property |
| def name(self): |
| """@return a string: representing name of the worker class""" |
| raise NotImplementedError('Missing subclass implementation') |
| |
| |
| @classmethod |
| def create_from_parent(cls, parent_obj, **init_args): |
| """Creates a derived ConnectionWorker object from the provided parent |
| object. |
| |
| @param cls: derived class object which we're trying to create. |
| @param obj: existing parent class object. |
| @param init_args: Args to be passed to the derived class constructor. |
| |
| @returns Instance of cls with the required fields copied from parent. |
| """ |
| obj = cls(**init_args) |
| obj.work_client = parent_obj.work_client |
| obj.host = parent_obj.host |
| return obj |
| |
| |
| def prepare_work_client(self, work_client_machine): |
| """Prepare the SSHHost object into WiFiClient object |
| |
| @param work_client_machine: a SSHHost object to be wrapped |
| |
| """ |
| work_client_host = hosts.create_host(work_client_machine.hostname) |
| # All packet captures in chaos lab have dual NICs. Let us use phy1 to |
| # be a radio dedicated for work client |
| iw = iw_runner.IwRunner(remote_host=work_client_host) |
| phys = iw.list_phys() |
| devs = iw.list_interfaces(desired_if_type='managed') |
| if len(devs) > 0: |
| logging.debug('Removing interfaces in work host machine %s', devs) |
| for i in range(len(devs)): |
| iw.remove_interface(devs[i].if_name) |
| if len(phys) > 1: |
| logging.debug('Adding interfaces in work host machine') |
| iw.add_interface('phy1', 'work0', 'managed') |
| logging.debug('Interfaces in work client %s', iw.list_interfaces()) |
| elif len(phys) == 1: |
| raise error.TestError('Not enough phys available to create a' |
| 'work client interface %s.' % |
| work_client_host.hostname) |
| self.work_client = wifi_client.WiFiClient(work_client_host, './debug') |
| # Make the host object easily accessible |
| self.host = self.work_client.host |
| |
| |
| def connect_work_client(self, assoc_params): |
| """ |
| Connect client to the AP. |
| |
| Tries to connect the work client to AP in WORK_CLIENT_CONNECTION_RETRIES |
| tries. If we fail to connect in all tries then we would return False |
| otherwise returns True on successful connection to the AP. |
| |
| @param assoc_params: an AssociationParameters object. |
| @return a boolean: True if work client is successfully connected to AP |
| or False on failing to connect to the AP |
| |
| """ |
| if not self.work_client.shill.init_test_network_state(): |
| logging.error('Failed to set up isolated test context profile for ' |
| 'work client.') |
| return False |
| |
| success = False |
| for i in range(WORK_CLIENT_CONNECTION_RETRIES): |
| logging.info('Connecting work client to AP') |
| assoc_result = xmlrpc_datatypes.deserialize( |
| self.work_client.shill.connect_wifi(assoc_params)) |
| success = assoc_result.success |
| if not success: |
| logging.error('Connection attempt of work client failed, try %d' |
| ' reason: %s', (i+1), assoc_result.failure_reason) |
| else: |
| logging.info('Work client connected to the AP') |
| self.ssid = assoc_params.ssid |
| break |
| return success |
| |
| |
| def cleanup(self): |
| """Teardown work_client""" |
| self.work_client.shill.disconnect(self.ssid) |
| self.work_client.shill.clean_profiles() |
| |
| |
| def run(self, client): |
| """Executes the connection worker |
| |
| @param client: WiFiClient object representing the DUT |
| |
| """ |
| raise NotImplementedError('Missing subclass implementation') |
| |
| |
| class ConnectionDuration(ConnectionWorker): |
| """This test is to check the liveliness of the connection to the AP. """ |
| |
| def __init__(self, duration_sec=30): |
| """ |
| Holds WiFi connection open with periodic pings |
| |
| @param duration_sec: amount of time to hold connection in seconds |
| |
| """ |
| |
| self.duration_sec = duration_sec |
| |
| |
| @property |
| def name(self): |
| """@return a string: representing name of this class""" |
| return 'duration' |
| |
| |
| def run(self, client): |
| """Periodically pings work client to check liveliness of the connection |
| |
| @param client: WiFiClient object representing the DUT |
| |
| """ |
| ping_config = ping_runner.PingConfig(self.work_client.wifi_ip, count=10) |
| logging.info('Pinging work client ip: %s', self.work_client.wifi_ip) |
| start_time = time.time() |
| while time.time() - start_time < self.duration_sec: |
| time.sleep(10) |
| ping_result = client.ping(ping_config) |
| logging.info('Connection liveness %r', ping_result) |
| |
| |
| class ConnectionSuspend(ConnectionWorker): |
| """ |
| This test is to check the liveliness of the connection to the AP with |
| suspend resume cycle involved. |
| |
| """ |
| |
| def __init__(self, suspend_sec=30): |
| """ |
| Construct a ConnectionSuspend. |
| |
| @param suspend_sec: amount of time to suspend in seconds |
| |
| """ |
| |
| self._suspend_sec = suspend_sec |
| |
| |
| @property |
| def name(self): |
| """@return a string: representing name of this class""" |
| return 'suspend' |
| |
| |
| def run(self, client): |
| """ |
| Check the liveliness of the connection to the AP by pinging the work |
| client before and after a suspend resume. |
| |
| @param client: WiFiClient object representing the DUT |
| |
| """ |
| ping_config = ping_runner.PingConfig(self.work_client.wifi_ip, count=10) |
| # pinging work client to ensure we have a connection |
| logging.info('work client ip: %s', self.work_client.wifi_ip) |
| ping_result = client.ping(ping_config) |
| logging.info('before suspend:%r', ping_result) |
| client.do_suspend(self._suspend_sec) |
| # When going to suspend, DUTs using ath9k devices do not disassociate |
| # from the AP. On resume, DUTs would re-use the association from prior |
| # to suspend. However, this leads to some confused state for some APs |
| # (see crbug.com/346417) where the AP responds to actions frames like |
| # NullFunc but not to any data frames like DHCP/ARP packets from the |
| # DUT. Let us sleep for: |
| # + 2 seconds for linkmonitor to detect failure if any |
| # + 10 seconds for ReconnectTimer timeout |
| # + 5 seconds to reconnect to the AP |
| # + 3 seconds let us not have a very strict timeline. |
| # 20 seconds before we start to query shill about the connection state. |
| # TODO (krisr): add board detection code in wifi_client and adjust the |
| # sleep time here based on the wireless chipset |
| time.sleep(20) |
| |
| # Wait for WAIT_FOR_CONNECTION time before trying to ping. |
| success, state, elapsed_time = client.wait_for_service_states( |
| self.ssid, ('ready', 'portal', 'online'), WAIT_FOR_CONNECTION) |
| if not success: |
| raise error.TestFail('DUT failed to connect to AP (%s state) after' |
| 'resume in %d seconds' % |
| (state, WAIT_FOR_CONNECTION)) |
| else: |
| logging.info('DUT entered %s state after %s seconds', |
| state, elapsed_time) |
| # ping work client to ensure we have connection after resume. |
| ping_result = client.ping(ping_config) |
| logging.info('after resume:%r', ping_result) |
| |
| |
| class ConnectionNetperf(ConnectionWorker): |
| """ |
| This ConnectionWorker is used to run a sustained data transfer between the |
| DUT and the work_client through an AP. |
| |
| """ |
| |
| # Minimum expected throughput for netperf streaming tests |
| NETPERF_MIN_THROUGHPUT = 2.0 # Mbps |
| |
| def __init__(self, netperf_config): |
| """ |
| Construct a ConnectionNetperf object. |
| |
| @param netperf_config: NetperfConfig object to define transfer test. |
| |
| """ |
| self._config = netperf_config |
| |
| |
| @property |
| def name(self): |
| """@return a string: representing name of this class""" |
| return 'netperf_%s' % self._config.human_readable_tag |
| |
| |
| def run(self, client): |
| """ |
| Create a NetperfRunner, run netperf between DUT and work_client. |
| |
| @param client: WiFiClient object representing the DUT |
| |
| """ |
| with netperf_runner.NetperfRunner( |
| client, self.work_client, self._config) as netperf: |
| ping_config = ping_runner.PingConfig( |
| self.work_client.wifi_ip, count=10) |
| # pinging work client to ensure we have a connection |
| logging.info('work client ip: %s', self.work_client.wifi_ip) |
| ping_result = client.ping(ping_config) |
| |
| result = netperf.run(self._config) |
| logging.info('Netperf Result: %s', result) |
| |
| if result is None: |
| raise error.TestError('Failed to create NetperfResult') |
| |
| if result.duration_seconds < self._config.test_time: |
| raise error.TestFail( |
| 'Netperf duration too short: %0.2f < %0.2f' % |
| (result.duration_seconds, self._config.test_time)) |
| |
| # TODO: Convert this limit to a perf metric crbug.com/348780 |
| if result.throughput <self.NETPERF_MIN_THROUGHPUT: |
| raise error.TestFail( |
| 'Netperf throughput too low: %0.2f < %0.2f' % |
| (result.throughput, self.NETPERF_MIN_THROUGHPUT)) |
