blob: 3d753698d07ee202b9a2f2604d21c8fe57058611 [file] [log] [blame] [edit]
# 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 logging
import time
from autotest_lib.client.common_lib import error
from autotest_lib.client.common_lib.cros import site_eap_certs
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.client.common_lib.cros.network import xmlrpc_security_types
from autotest_lib.server.cros.network import hostap_config
from autotest_lib.server.cros.network import wifi_cell_test_base
class network_WiFi_PMKSACaching(wifi_cell_test_base.WiFiCellTestBase):
"""Test that we use PMKSA caching where appropriate."""
version = 1
AP0_FREQUENCY = 2412
AP1_FREQUENCY = 5220
TIMEOUT_SECONDS = 15
def dut_sees_bss(self, bssid):
"""
Check if a DUT can see a BSS in scan results.
@param bssid: string bssid of AP we expect to see in scan results.
@return True iff scan results from DUT include the specified BSS.
"""
runner = iw_runner.IwRunner(remote_host=self.context.client.host)
is_requested_bss = lambda iw_bss: iw_bss.bss == bssid
scan_results = runner.scan(self.context.client.wifi_if)
return scan_results and filter(is_requested_bss, scan_results)
def retry(self, func, reason, timeout_seconds=TIMEOUT_SECONDS):
"""
Retry a function until it returns true or we time out.
@param func: function that takes no parameters.
@param reason: string concise description of what the function does.
@param timeout_seconds: int number of seconds to wait for a True
response from |func|.
"""
logging.info('Waiting for %s.', reason)
start_time = time.time()
while time.time() - start_time < timeout_seconds:
if func():
return
time.sleep(1)
else:
raise error.TestFail('Timed out waiting for %s.' % reason)
def run_once(self):
"""Body of the test."""
mode_n = hostap_config.HostapConfig.MODE_11N_PURE
eap_config = xmlrpc_security_types.WPAEAPConfig(
server_ca_cert=site_eap_certs.ca_cert_1,
server_cert=site_eap_certs.server_cert_1,
server_key=site_eap_certs.server_private_key_1,
client_ca_cert=site_eap_certs.ca_cert_1,
client_cert=site_eap_certs.client_cert_1,
client_key=site_eap_certs.client_private_key_1,
# PMKSA caching is only defined for WPA2.
wpa_mode=xmlrpc_security_types.WPAConfig.MODE_PURE_WPA2)
ap_config0 = hostap_config.HostapConfig(
mode=mode_n, frequency=self.AP0_FREQUENCY,
security_config=eap_config)
self.context.configure(ap_config0)
assoc_params = xmlrpc_datatypes.AssociationParameters(
ssid=self.context.router.get_ssid(),
security_config=eap_config)
self.context.assert_connect_wifi(assoc_params)
# Add another AP with identical configuration except in 5 Ghz.
ap_config1 = hostap_config.HostapConfig(
mode=mode_n, ssid=self.context.router.get_ssid(),
frequency=self.AP1_FREQUENCY, security_config=eap_config)
self.context.configure(ap_config1, multi_interface=True)
bssid0 = self.context.router.get_hostapd_mac(0)
bssid1 = self.context.router.get_hostapd_mac(1)
self.retry(lambda: self.dut_sees_bss(bssid1), 'DUT to see second AP')
self.context.client.request_roam(bssid1)
if not self.context.client.wait_for_roam(
bssid1, timeout_seconds=self.TIMEOUT_SECONDS):
raise error.TestFail('Failed to roam to second BSS.')
self.context.router.deconfig_aps(instance=1, silent=True)
if not self.context.client.wait_for_roam(
bssid0, timeout_seconds=self.TIMEOUT_SECONDS):
raise error.TestFail('Failed to fall back to first BSS.')
pinger = ping_runner.PingRunner(host=self.context.client.host)
self.retry(lambda: pinger.simple_ping(
self.context.router.get_wifi_ip(0)),
'DUT to be able to ping first BSS after fallback')
self.context.router.confirm_pmksa_cache_use(instance=0)