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hostapd/tests/hwsim/test_ap_roam.py
Jouni Malinen fa34e3255e tests: Make test cases more robust by clearing scan cache explicitly 
This test cases can fail if previously executed tests leave older scan
results in cfg80211 scan table. Clear that scan table explicitly to
avoid such issues.

Signed-off-by: Jouni Malinen <quic_jouni@quicinc.com>
2022-02-26 19:12:11 +02:00

397 lines
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# Roaming tests
# Copyright (c) 2013-2021, Jouni Malinen <j@w1.fi>
#
# This software may be distributed under the terms of the BSD license.
# See README for more details.
from remotehost import remote_compatible
import time
import logging
logger = logging.getLogger()
import hwsim_utils
import hostapd
from wpasupplicant import WpaSupplicant
@remote_compatible
def test_ap_roam_open(dev, apdev):
"""Roam between two open APs"""
hapd0 = hostapd.add_ap(apdev[0], {"ssid": "test-open"})
dev[0].connect("test-open", key_mgmt="NONE")
hwsim_utils.test_connectivity(dev[0], hapd0)
hapd1 = hostapd.add_ap(apdev[1], {"ssid": "test-open"})
dev[0].scan(type="ONLY")
dev[0].roam(apdev[1]['bssid'])
hwsim_utils.test_connectivity(dev[0], hapd1)
dev[0].roam(apdev[0]['bssid'])
hwsim_utils.test_connectivity(dev[0], hapd0)
def test_ap_ignore_bssid_all(dev, apdev, params):
"""Ensure we clear the ignore BSSID list if all visible APs reject"""
hapd0 = hostapd.add_ap(apdev[0], {"ssid": "test-open", "max_num_sta": "0"})
hapd1 = hostapd.add_ap(apdev[1], {"ssid": "test-open", "max_num_sta": "0"})
bss0 = hapd0.own_addr()
bss1 = hapd1.own_addr()
dev[0].connect("test-open", key_mgmt="NONE", scan_freq="2412",
wait_connect=False, bssid=bss0)
if not dev[0].wait_event(["CTRL-EVENT-AUTH-REJECT"], timeout=10):
raise Exception("AP 0 didn't reject us")
dev[0].request("REMOVE_NETWORK all")
dev[0].dump_monitor()
dev[0].connect("test-open", key_mgmt="NONE", scan_freq="2412",
wait_connect=False, bssid=bss1)
if not dev[0].wait_event(["CTRL-EVENT-AUTH-REJECT"], timeout=10):
raise Exception("AP 1 didn't reject us")
ignore_list = get_bssid_ignore_list(dev[0])
logger.info("ignore list: " + str(ignore_list))
dev[0].request("REMOVE_NETWORK all")
dev[0].dump_monitor()
hapd0.set("max_num_sta", "1")
# All visible APs were ignored; we should clear the ignore list and find
# the AP that now accepts us.
dev[0].scan_for_bss(bss0, freq=2412)
dev[0].connect("test-open", key_mgmt="NONE", scan_freq="2412", bssid=bss0)
@remote_compatible
def test_ap_roam_open_failed(dev, apdev):
"""Roam failure due to rejected authentication"""
hapd0 = hostapd.add_ap(apdev[0], {"ssid": "test-open"})
dev[0].connect("test-open", key_mgmt="NONE", scan_freq="2412")
hwsim_utils.test_connectivity(dev[0], hapd0)
params = {"ssid": "test-open", "max_num_sta": "0"}
hapd1 = hostapd.add_ap(apdev[1], params)
bssid = hapd1.own_addr()
dev[0].scan_for_bss(bssid, freq=2412)
dev[0].dump_monitor()
if "OK" not in dev[0].request("ROAM " + bssid):
raise Exception("ROAM failed")
ev = dev[0].wait_event(["CTRL-EVENT-AUTH-REJECT"], 1)
if not ev:
raise Exception("CTRL-EVENT-AUTH-REJECT was not seen")
dev[0].wait_connected(timeout=5)
hwsim_utils.test_connectivity(dev[0], hapd0)
def test_ap_roam_open_failed_ssid_mismatch(dev, apdev):
"""Roam failure due to SSID mismatch"""
hapd0 = hostapd.add_ap(apdev[0], {"ssid": "test-open"})
bssid0 = hapd0.own_addr()
hapd1 = hostapd.add_ap(apdev[1], {"ssid": "test-open2"})
bssid1 = hapd1.own_addr()
dev[0].flush_scan_cache()
dev[0].scan_for_bss(bssid0, freq=2412)
dev[0].scan_for_bss(bssid1, freq=2412)
dev[0].connect("test-open", key_mgmt="NONE", scan_freq="2412")
hapd0.wait_sta()
bssid = dev[0].get_status_field("bssid")
if bssid != bssid0:
raise Exception("Unexpected BSSID reported after initial connection: " + bssid)
if "FAIL" not in dev[0].request("ROAM " + bssid1):
raise Exception("ROAM succeed unexpectedly")
bssid = dev[0].get_status_field("bssid")
if bssid != bssid0:
raise Exception("Unexpected BSSID reported after failed roam attempt: " + bssid)
hwsim_utils.test_connectivity(dev[0], hapd0)
@remote_compatible
def test_ap_roam_wpa2_psk(dev, apdev):
"""Roam between two WPA2-PSK APs"""
params = hostapd.wpa2_params(ssid="test-wpa2-psk", passphrase="12345678")
hapd0 = hostapd.add_ap(apdev[0], params)
dev[0].connect("test-wpa2-psk", psk="12345678")
hapd0.wait_sta()
hwsim_utils.test_connectivity(dev[0], hapd0)
hapd1 = hostapd.add_ap(apdev[1], params)
dev[0].scan(type="ONLY")
dev[0].roam(apdev[1]['bssid'])
hapd1.wait_sta()
hwsim_utils.test_connectivity(dev[0], hapd1)
dev[0].roam(apdev[0]['bssid'])
hapd0.wait_sta()
hwsim_utils.test_connectivity(dev[0], hapd0)
def test_ap_roam_wpa2_psk_pmf_mismatch(dev, apdev):
"""Roam between two WPA2-PSK APs - PMF mismatch"""
params = hostapd.wpa2_params(ssid="test-wpa2-psk", passphrase="12345678")
params['ieee80211w'] = '1'
hapd0 = hostapd.add_ap(apdev[0], params)
bssid0 = hapd0.own_addr()
params['ieee80211w'] = '0'
hapd1 = hostapd.add_ap(apdev[1], params)
bssid1 = hapd1.own_addr()
dev[0].flush_scan_cache()
dev[0].scan_for_bss(bssid0, freq=2412)
dev[0].scan_for_bss(bssid1, freq=2412)
dev[0].connect("test-wpa2-psk", psk="12345678", ieee80211w='2')
hapd0.wait_sta()
bssid = dev[0].get_status_field("bssid")
if bssid != bssid0:
raise Exception("Unexpected BSSID reported after initial connection: " + bssid)
if "OK" not in dev[0].request("ROAM " + apdev[1]['bssid']):
raise Exception("ROAM failed")
ev = dev[0].wait_event(["CTRL-EVENT-CONNECTED"], timeout=0.5)
if ev is not None:
raise Exception("Unexpected connection reported")
bssid = dev[0].get_status_field("bssid")
if bssid != bssid0:
raise Exception("Unexpected BSSID reported after failed roam attempt: " + bssid)
hwsim_utils.test_connectivity(dev[0], hapd0)
def get_bssid_ignore_list(dev):
return dev.request("BSSID_IGNORE").splitlines()
def test_ap_reconnect_auth_timeout(dev, apdev, params):
"""Reconnect to 2nd AP and authentication times out"""
wpas = WpaSupplicant(global_iface='/tmp/wpas-wlan5')
wpas.interface_add("wlan5",
drv_params="force_connect_cmd=1,force_bss_selection=1")
wpas.flush_scan_cache()
params = hostapd.wpa2_params(ssid="test-wpa2-psk", passphrase="12345678")
hapd0 = hostapd.add_ap(apdev[0], params)
bssid0 = hapd0.own_addr()
wpas.scan_for_bss(bssid0, freq=2412)
id = wpas.connect("test-wpa2-psk", psk="12345678", scan_freq="2412")
hapd0.wait_sta()
hwsim_utils.test_connectivity(wpas, hapd0)
hapd1 = hostapd.add_ap(apdev[1], params)
bssid1 = hapd1.own_addr()
wpas.request("BSSID_IGNORE " + bssid0)
wpas.scan_for_bss(bssid1, freq=2412)
wpas.request("DISCONNECT")
if "OK" not in wpas.request("SET ignore_auth_resp 1"):
raise Exception("SET ignore_auth_resp failed")
if "OK" not in wpas.request("ENABLE_NETWORK " + str(id)):
raise Exception("ENABLE_NETWORK failed")
if "OK" not in wpas.request("SELECT_NETWORK " + str(id)):
raise Exception("SELECT_NETWORK failed")
logger.info("Wait ~10s for auth timeout...")
time.sleep(10)
ev = wpas.wait_event(["CTRL-EVENT-SCAN-STARTED"], 12)
if not ev:
raise Exception("CTRL-EVENT-SCAN-STARTED not seen")
b = get_bssid_ignore_list(wpas)
if '00:00:00:00:00:00' in b:
raise Exception("Unexpected ignore list contents: " + str(b))
if bssid1 not in b:
raise Exception("Unexpected ignore list contents: " + str(b))
def test_ap_roam_with_reassoc_auth_timeout(dev, apdev, params):
"""Roam using reassoc between two APs and authentication times out"""
wpas = WpaSupplicant(global_iface='/tmp/wpas-wlan5')
wpas.interface_add("wlan5",
drv_params="force_connect_cmd=1,force_bss_selection=1")
params = hostapd.wpa2_params(ssid="test-wpa2-psk", passphrase="12345678")
hapd0 = hostapd.add_ap(apdev[0], params)
bssid0 = hapd0.own_addr()
id = wpas.connect("test-wpa2-psk", psk="12345678", scan_freq="2412")
hapd0.wait_sta()
hwsim_utils.test_connectivity(wpas, hapd0)
hapd1 = hostapd.add_ap(apdev[1], params)
bssid1 = hapd1.own_addr()
wpas.scan_for_bss(bssid1, freq=2412)
if "OK" not in wpas.request("SET_NETWORK " + str(id) + " bssid " + bssid1):
raise Exception("SET_NETWORK failed")
if "OK" not in wpas.request("SET ignore_auth_resp 1"):
raise Exception("SET ignore_auth_resp failed")
if "OK" not in wpas.request("REASSOCIATE"):
raise Exception("REASSOCIATE failed")
logger.info("Wait ~10s for auth timeout...")
time.sleep(10)
ev = wpas.wait_event(["CTRL-EVENT-SCAN-STARTED"], 12)
if not ev:
raise Exception("CTRL-EVENT-SCAN-STARTED not seen")
b = get_bssid_ignore_list(wpas)
if bssid0 in b:
raise Exception("Unexpected ignore list contents: " + str(b))
def test_ap_roam_wpa2_psk_failed(dev, apdev, params):
"""Roam failure with WPA2-PSK AP due to wrong passphrase"""
params = hostapd.wpa2_params(ssid="test-wpa2-psk", passphrase="12345678")
hapd0 = hostapd.add_ap(apdev[0], params)
id = dev[0].connect("test-wpa2-psk", psk="12345678", scan_freq="2412")
hapd0.wait_sta()
hwsim_utils.test_connectivity(dev[0], hapd0)
params['wpa_passphrase'] = "22345678"
hapd1 = hostapd.add_ap(apdev[1], params)
bssid = hapd1.own_addr()
dev[0].scan_for_bss(bssid, freq=2412)
dev[0].dump_monitor()
if "OK" not in dev[0].request("ROAM " + bssid):
raise Exception("ROAM failed")
ev = dev[0].wait_event(["CTRL-EVENT-SSID-TEMP-DISABLED",
"CTRL-EVENT-CONNECTED"], 5)
if "CTRL-EVENT-CONNECTED" in ev:
raise Exception("Got unexpected CTRL-EVENT-CONNECTED")
if "CTRL-EVENT-SSID-TEMP-DISABLED" not in ev:
raise Exception("CTRL-EVENT-SSID-TEMP-DISABLED not seen")
if "OK" not in dev[0].request("SELECT_NETWORK id=" + str(id)):
raise Exception("SELECT_NETWORK failed")
ev = dev[0].wait_event(["CTRL-EVENT-SSID-REENABLED"], 3)
if not ev:
raise Exception("CTRL-EVENT-SSID-REENABLED not seen")
dev[0].wait_connected(timeout=5)
hapd0.wait_sta()
hwsim_utils.test_connectivity(dev[0], hapd0)
@remote_compatible
def test_ap_reassociation_to_same_bss(dev, apdev):
"""Reassociate to the same BSS"""
hapd = hostapd.add_ap(apdev[0], {"ssid": "test-open"})
dev[0].connect("test-open", key_mgmt="NONE")
hapd.wait_sta()
dev[0].request("REASSOCIATE")
dev[0].wait_connected(timeout=10, error="Reassociation timed out")
hapd.wait_sta()
hwsim_utils.test_connectivity(dev[0], hapd)
dev[0].request("REATTACH")
dev[0].wait_connected(timeout=10, error="Reattach timed out")
hapd.wait_sta()
hwsim_utils.test_connectivity(dev[0], hapd)
# Wait for previous scan results to expire to trigger new scan
time.sleep(5)
dev[0].request("REATTACH")
dev[0].wait_connected(timeout=10, error="Reattach timed out")
hapd.wait_sta()
hwsim_utils.test_connectivity(dev[0], hapd)
@remote_compatible
def test_ap_roam_set_bssid(dev, apdev):
"""Roam control"""
hostapd.add_ap(apdev[0], {"ssid": "test-open"})
hostapd.add_ap(apdev[1], {"ssid": "test-open"})
id = dev[0].connect("test-open", key_mgmt="NONE", bssid=apdev[1]['bssid'],
scan_freq="2412")
if dev[0].get_status_field('bssid') != apdev[1]['bssid']:
raise Exception("Unexpected BSS")
# for now, these are just verifying that the code path to indicate
# within-ESS roaming changes can be executed; the actual results of those
# operations are not currently verified (that would require a test driver
# that does BSS selection)
dev[0].set_network(id, "bssid", "")
dev[0].set_network(id, "bssid", apdev[0]['bssid'])
dev[0].set_network(id, "bssid", apdev[1]['bssid'])
@remote_compatible
def test_ap_roam_wpa2_psk_race(dev, apdev):
"""Roam between two WPA2-PSK APs and try to hit a disconnection race"""
params = hostapd.wpa2_params(ssid="test-wpa2-psk", passphrase="12345678")
hapd0 = hostapd.add_ap(apdev[0], params)
dev[0].connect("test-wpa2-psk", psk="12345678", scan_freq="2412")
hapd0.wait_sta()
hwsim_utils.test_connectivity(dev[0], hapd0)
params['channel'] = '2'
hapd1 = hostapd.add_ap(apdev[1], params)
dev[0].scan_for_bss(apdev[1]['bssid'], freq=2417)
dev[0].roam(apdev[1]['bssid'])
hapd1.wait_sta()
hwsim_utils.test_connectivity(dev[0], hapd1)
dev[0].roam(apdev[0]['bssid'])
hapd0.wait_sta()
hwsim_utils.test_connectivity(dev[0], hapd0)
# Wait at least two seconds to trigger the previous issue with the
# disconnection callback.
for i in range(3):
time.sleep(0.8)
hwsim_utils.test_connectivity(dev[0], hapd0)
def test_ap_roam_signal_level_override(dev, apdev):
"""Roam between two APs based on driver signal level override"""
hapd0 = hostapd.add_ap(apdev[0], {"ssid": "test-open"})
bssid0 = apdev[0]['bssid']
hapd1 = hostapd.add_ap(apdev[1], {"ssid": "test-open"})
bssid1 = apdev[1]['bssid']
dev[0].scan_for_bss(bssid0, freq=2412)
dev[0].scan_for_bss(bssid1, freq=2412)
dev[0].connect("test-open", key_mgmt="NONE")
bssid = dev[0].get_status_field('bssid')
if bssid == bssid0:
dst = bssid1
src = bssid0
else:
dst = bssid0
src = bssid1
dev[0].scan(freq=2412)
ev = dev[0].wait_event(["CTRL-EVENT-CONNECTED"], 0.5)
if ev is not None:
raise Exception("Unexpected roam")
orig_res = dev[0].request("SIGNAL_POLL")
dev[0].set("driver_signal_override", src + " -1 -2 -3 -4 -5")
res = dev[0].request("SIGNAL_POLL").splitlines()
if "RSSI=-1" not in res or \
"AVG_RSSI=-2" not in res or \
"AVG_BEACON_RSSI=-3" not in res or \
"NOISE=-4" not in res:
raise Exception("SIGNAL_POLL override did not work: " + str(res))
dev[0].set("driver_signal_override", src)
new_res = dev[0].request("SIGNAL_POLL")
if orig_res != new_res:
raise Exception("SIGNAL_POLL restore did not work: " + new_res)
tests = [("-30 -30 -30 -95 -30", "-30 -30 -30 -95 -30"),
("-30 -30 -30 -95 -30", "-20 -20 -20 -95 -20"),
("-90 -90 -90 -95 -90", "-89 -89 -89 -95 -89"),
("-90 -90 -90 -95 -95", "-89 -89 -89 -95 -89")]
for src_override, dst_override in tests:
dev[0].set("driver_signal_override", src + " " + src_override)
dev[0].set("driver_signal_override", dst + " " + dst_override)
dev[0].scan(freq=2412)
ev = dev[0].wait_event(["CTRL-EVENT-CONNECTED"], 0.1)
if ev is not None:
raise Exception("Unexpected roam")
dev[0].dump_monitor()
dev[0].set("driver_signal_override", src + " -90 -90 -90 -95 -90")
dev[0].set("driver_signal_override", dst + " -80 -80 -80 -95 -80")
dev[0].scan(freq=2412)
dev[0].wait_connected()
if dst != dev[0].get_status_field('bssid'):
raise Exception("Unexpected AP after roam")
dev[0].dump_monitor()
def test_ap_roam_during_scan(dev, apdev):
"""Roam command during a scan operation"""
hapd0 = hostapd.add_ap(apdev[0], {"ssid": "test-open"})
dev[0].flush_scan_cache()
dev[0].scan_for_bss(hapd0.own_addr(), freq=2412)
dev[0].connect("test-open", key_mgmt="NONE")
hapd1 = hostapd.add_ap(apdev[1], {"ssid": "test-open"})
dev[0].scan_for_bss(hapd1.own_addr(), freq=2412)
if "OK" not in dev[0].request("SCAN"):
raise Exception("Failed to start scan")
if "OK" not in dev[0].request("ROAM " + hapd1.own_addr()):
raise Exception("Failed to issue ROAM")
ev = dev[0].wait_event(["CTRL-EVENT-CONNECTED"], timeout=10)
if ev is None:
raise Exception("Connection not reported after ROAM")
if hapd1.own_addr() not in ev:
raise Exception("Connected to unexpected AP")
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