| # 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. |
| |
| from autotest_lib.client.common_lib.cros.network import xmlrpc_datatypes |
| from autotest_lib.server.cros.wlan import hostap_config |
| from autotest_lib.server.cros.wlan import wifi_test_base |
| from autotest_lib.server.cros.wlan import wifi_client |
| |
| |
| class network_WiFi_DTIMPeriod(wifi_test_base.WiFiTestBase): |
| """Test that we understand the routers negotiated DTIM period.""" |
| version = 1 |
| |
| |
| def run_once_impl(self): |
| """DTIM period test. |
| |
| DTIM stands for delivery traffic information message and refers to |
| the number of beacons between DTIMS. For instance, a DTIM period |
| of 1 would indicate that every beacon should have a DTIM element. |
| The default DTIM period value is 2. |
| |
| This flag is used in combination with powersave mode as follows: |
| 1) A client goes into powersave mode and notifies the router. |
| 2) While in powersave mode, the client turns off as much as possible; |
| the AP is supposed to buffer unicast traffic. |
| 3) The client wakes up to receive beacons, which may include a DTIM |
| notification. |
| 4) On receiving such a notification, the client should |
| stay up to recieve the pending frames. |
| |
| """ |
| dtim_val = 5 |
| configuration = hostap_config.HostapConfig( |
| frequency=2437, |
| mode=hostap_config.HostapConfig.MODE_11G, |
| dtim_period=dtim_val) |
| self.context.configure(configuration) |
| assoc_params = xmlrpc_datatypes.AssociationParameters() |
| assoc_params.ssid = self.context.router.get_ssid() |
| self.context.client.powersave_switch(True) |
| self.assert_connect_wifi(assoc_params) |
| self.context.client.check_iw_link_value( |
| wifi_client.WiFiClient.IW_LITNK_KEY_DTIM_PERIOD, |
| dtim_val) |
| self.assert_ping_from_dut() |
| self.context.client.shill.disconnect(assoc_params.ssid) |
| self.context.client.powersave_switch(False) |
| self.context.router.deconfig() |