1 # Copyright (c) 2013 The Chromium OS Authors. All rights reserved. 2 # Use of this source code is governed by a BSD-style license that can be 3 # found in the LICENSE file. 4 5 import logging 6 import time 7 8 from autotest_lib.client.common_lib import error 9 from autotest_lib.client.common_lib.cros import site_eap_certs 10 from autotest_lib.client.common_lib.cros.network import iw_runner 11 from autotest_lib.client.common_lib.cros.network import ping_runner 12 from autotest_lib.client.common_lib.cros.network import xmlrpc_datatypes 13 from autotest_lib.client.common_lib.cros.network import xmlrpc_security_types 14 from autotest_lib.server.cros.network import hostap_config 15 from autotest_lib.server.cros.network import wifi_cell_test_base 16 17 18 class network_WiFi_PMKSACaching(wifi_cell_test_base.WiFiCellTestBase): 19 """Test that we use PMKSA caching where appropriate.""" 20 version = 1 21 AP0_FREQUENCY = 2412 22 AP1_FREQUENCY = 5220 23 TIMEOUT_SECONDS = 15 24 25 26 def dut_sees_bss(self, bssid): 27 """ 28 Check if a DUT can see a BSS in scan results. 29 30 @param bssid: string bssid of AP we expect to see in scan results. 31 @return True iff scan results from DUT include the specified BSS. 32 33 """ 34 runner = iw_runner.IwRunner(remote_host=self.context.client.host) 35 is_requested_bss = lambda iw_bss: iw_bss.bss == bssid 36 scan_results = runner.scan(self.context.client.wifi_if) 37 return scan_results and filter(is_requested_bss, scan_results) 38 39 40 def retry(self, func, reason, timeout_seconds=TIMEOUT_SECONDS): 41 """ 42 Retry a function until it returns true or we time out. 43 44 @param func: function that takes no parameters. 45 @param reason: string concise description of what the function does. 46 @param timeout_seconds: int number of seconds to wait for a True 47 response from |func|. 48 49 """ 50 logging.info('Waiting for %s.', reason) 51 start_time = time.time() 52 while time.time() - start_time < timeout_seconds: 53 if func(): 54 return 55 time.sleep(1) 56 else: 57 raise error.TestFail('Timed out waiting for %s.' % reason) 58 59 60 def run_once(self): 61 """Body of the test.""" 62 mode_n = hostap_config.HostapConfig.MODE_11N_PURE 63 eap_config = xmlrpc_security_types.WPAEAPConfig( 64 server_ca_cert=site_eap_certs.ca_cert_1, 65 server_cert=site_eap_certs.server_cert_1, 66 server_key=site_eap_certs.server_private_key_1, 67 client_ca_cert=site_eap_certs.ca_cert_1, 68 client_cert=site_eap_certs.client_cert_1, 69 client_key=site_eap_certs.client_private_key_1, 70 # PMKSA caching is only defined for WPA2. 71 wpa_mode=xmlrpc_security_types.WPAConfig.MODE_PURE_WPA2) 72 ap_config0 = hostap_config.HostapConfig( 73 mode=mode_n, frequency=self.AP0_FREQUENCY, 74 security_config=eap_config) 75 self.context.configure(ap_config0) 76 assoc_params = xmlrpc_datatypes.AssociationParameters( 77 ssid=self.context.router.get_ssid(), 78 security_config=eap_config) 79 self.context.assert_connect_wifi(assoc_params) 80 # Add another AP with identical configuration except in 5 Ghz. 81 ap_config1 = hostap_config.HostapConfig( 82 mode=mode_n, ssid=self.context.router.get_ssid(), 83 frequency=self.AP1_FREQUENCY, security_config=eap_config) 84 self.context.configure(ap_config1, multi_interface=True) 85 bssid0 = self.context.router.get_hostapd_mac(0) 86 bssid1 = self.context.router.get_hostapd_mac(1) 87 self.retry(lambda: self.dut_sees_bss(bssid1), 'DUT to see second AP') 88 self.context.client.request_roam(bssid1) 89 if not self.context.client.wait_for_roam( 90 bssid1, timeout_seconds=self.TIMEOUT_SECONDS): 91 raise error.TestFail('Failed to roam to second BSS.') 92 93 self.context.router.deconfig_aps(instance=1, silent=True) 94 if not self.context.client.wait_for_roam( 95 bssid0, timeout_seconds=self.TIMEOUT_SECONDS): 96 raise error.TestFail('Failed to fall back to first BSS.') 97 98 pinger = ping_runner.PingRunner(host=self.context.client.host) 99 self.retry(lambda: pinger.simple_ping( 100 self.context.router.get_wifi_ip(0)), 101 'DUT to be able to ping first BSS after fallback') 102 self.context.router.confirm_pmksa_cache_use(instance=0) 103
