| # 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 import error |
| from autotest_lib.client.common_lib.cros.network import iw_runner |
| from autotest_lib.client.common_lib.cros.network import xmlrpc_datatypes |
| from autotest_lib.server.cros.network import hostap_config |
| from autotest_lib.server.cros.network import wifi_cell_test_base |
| |
| class network_WiFi_ChannelHop(wifi_cell_test_base.WiFiCellTestBase): |
| """Tests roaming when an AP changes channels on an SSID.""" |
| |
| version = 1 |
| ORIGINAL_FREQUENCY = 2412 |
| ORIGINAL_BSSID = "00:01:02:03:04:05" |
| |
| def run_once(self): |
| """Test body.""" |
| freq = network_WiFi_ChannelHop.ORIGINAL_FREQUENCY |
| ssid = self.context.router.build_unique_ssid() |
| ap_config = hostap_config.HostapConfig( |
| ssid=ssid, |
| frequency=freq, |
| mode=hostap_config.HostapConfig.MODE_11B, |
| bssid=network_WiFi_ChannelHop.ORIGINAL_BSSID) |
| self.context.configure(ap_config) |
| assoc_params = xmlrpc_datatypes.AssociationParameters( |
| ssid=self.context.router.get_ssid()) |
| self.context.assert_connect_wifi(assoc_params) |
| |
| self.context.assert_ping_from_dut() |
| self.context.client.check_iw_link_value( |
| iw_runner.IW_LINK_KEY_FREQUENCY, |
| freq) |
| self.context.router.deconfig() |
| |
| # This checks both channel jumping on the same BSSID and channel |
| # jumping between BSSIDs, all inside the same SSID. |
| for freq, bssid in ((2437, network_WiFi_ChannelHop.ORIGINAL_BSSID), |
| (2462, network_WiFi_ChannelHop.ORIGINAL_BSSID), |
| (2422, "06:07:08:09:0a:0b"), |
| (2447, "0c:0d:0e:0f:10:11")): |
| # Wait for the disconnect to happen. |
| success, state, elapsed_seconds = \ |
| self.context.client.wait_for_service_states(ssid, |
| ['idle'], 30) |
| |
| # Change channels on the AP. This happens in full view of the DUT |
| # and the AP deauths everyone as it exits. |
| ap_config = hostap_config.HostapConfig( |
| ssid=ssid, |
| frequency=freq, |
| mode=hostap_config.HostapConfig.MODE_11B, |
| bssid=bssid) |
| self.context.configure(ap_config) |
| |
| # Wait for the DUT to scan and acquire the AP at the new |
| # frequency. |
| success, state, elapsed_seconds = \ |
| self.context.client.wait_for_service_states(ssid, |
| self.context.client.CONNECTED_STATES, 30) |
| if not success: |
| raise error.TestFail( |
| 'Failed to connect to "%s" in %f seconds (state=%s)' % |
| (ssid, elapsed_seconds, state)) |
| |
| # Verify that we're connected. |
| self.context.assert_ping_from_dut() |
| |
| # Verify that the client switched to new frequency |
| self.context.client.check_iw_link_value( |
| iw_runner.IW_LINK_KEY_FREQUENCY, |
| freq) |
| self.context.router.deconfig() |
