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iwd/autotests/testRoamRetry/fast_retry_test.py

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auto-t: add test for roaming retry timing Recent changes make iwd more eager to retry roaming if it has detected a high RSSI since the last attempt. Add an autotest to verify this behaviour.
2021-01-27 11:05:00 +01:00
#!/usr/bin/python3
import unittest
import sys
sys.path.append('../util')
import iwd
from iwd import IWD
from iwd import PSKAgent
from iwd import NetworkType
import testutil
from hostapd import HostapdCLI
from hwsim import Hwsim
class Test(unittest.TestCase):
# Normally the time between a failed roam attempt and the next roam attempt
# is 60 seconds (default RoamRetryInterval). Test that we retry roaming
# faster if the transision looks like this: LOW [roam] [same bss] HIGH LOW.
def test_fast_retry(self):
hwsim = Hwsim()
bss_hostapd = [ HostapdCLI(config='ssid1.conf'),
HostapdCLI(config='ssid2.conf') ]
bss_radio = [ hwsim.get_radio('rad0'),
hwsim.get_radio('rad1') ]
rule0 = hwsim.rules.create()
rule0.source = bss_radio[0].addresses[0]
rule0.bidirectional = True
auto-t: update tests to enable hwsim rules
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rule0.enabled = True
auto-t: add test for roaming retry timing Recent changes make iwd more eager to retry roaming if it has detected a high RSSI since the last attempt. Add an autotest to verify this behaviour.
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rule1 = hwsim.rules.create()
rule1.source = bss_radio[1].addresses[0]
rule1.bidirectional = True
auto-t: update tests to enable hwsim rules
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rule1.enabled = True
auto-t: add test for roaming retry timing Recent changes make iwd more eager to retry roaming if it has detected a high RSSI since the last attempt. Add an autotest to verify this behaviour.
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# Fill in the neighbor AP tables in both BSSes. By default each
# instance knows only about current BSS, even inside one hostapd
# process.
# Roaming still works without the neighbor AP table but neighbor
# reports have to be disabled in the .conf files
bss0_nr = ''.join(bss_radio[0].addresses[0].split(':')) + \
'8f0000005101060603000000'
bss1_nr = ''.join(bss_radio[1].addresses[0].split(':')) + \
'8f0000005102060603000000'
bss_hostapd[0].set_neighbor(bss_radio[1].addresses[0], 'TestRoamRetry',
bss1_nr)
bss_hostapd[1].set_neighbor(bss_radio[0].addresses[0], 'TestRoamRetry',
bss0_nr)
# Start in the vicinity of BSS 0, check that iwd connects to BSS 0
rule0.signal = -2000
rule1.signal = -8500
wd = IWD()
psk_agent = PSKAgent("secret123")
wd.register_psk_agent(psk_agent)
devices = wd.list_devices(1)
device = devices[0]
auto-t: fixup testRoamRetry for better timing reliability Change a few critical checks that were failing sometimes: - A few asserts were changed to wait_for_object_condition - A 15 second timeout was removed (default used instead) - Do a full scan at beginning of each test to clear any cached BSS's. The second test run was getting stale results and the RSSI values were not expected.
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ordered_network = device.get_ordered_network('TestRoamRetry', full_scan=True)
auto-t: add test for roaming retry timing Recent changes make iwd more eager to retry roaming if it has detected a high RSSI since the last attempt. Add an autotest to verify this behaviour.
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self.assertEqual(ordered_network.type, NetworkType.psk)
condition = 'not obj.connected'
wd.wait_for_object_condition(ordered_network.network_object, condition)
ordered_network.network_object.connect()
condition = 'obj.state == DeviceState.connected'
wd.wait_for_object_condition(device, condition)
auto-t: fixup testRoamRetry for better timing reliability Change a few critical checks that were failing sometimes: - A few asserts were changed to wait_for_object_condition - A 15 second timeout was removed (default used instead) - Do a full scan at beginning of each test to clear any cached BSS's. The second test run was getting stale results and the RSSI values were not expected.
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bss_hostapd[0].wait_for_event('AP-STA-CONNECTED %s' % device.address)
auto-t: add test for roaming retry timing Recent changes make iwd more eager to retry roaming if it has detected a high RSSI since the last attempt. Add an autotest to verify this behaviour.
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wd.wait(5)
# Now push the signal LOW, wait for iwd to attempt a roam, fail, and
auto-t: fixup testRoamRetry for better timing reliability Change a few critical checks that were failing sometimes: - A few asserts were changed to wait_for_object_condition - A 15 second timeout was removed (default used instead) - Do a full scan at beginning of each test to clear any cached BSS's. The second test run was getting stale results and the RSSI values were not expected.
2022-03-28 19:28:34 +02:00
# schedule another attempt
auto-t: add test for roaming retry timing Recent changes make iwd more eager to retry roaming if it has detected a high RSSI since the last attempt. Add an autotest to verify this behaviour.
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rule0.signal = -8000
auto-t: speed up testRoamRetry This test took quite a while to execute (~2 minutes on my machine) because there was simply no other way to test this scenario but waiting. Now the no-roam-candidates condition can be waited for rather than just sleeping for 20 seconds. Additionally the default RoamRetryInterval was being used which is 60 seconds. Instead main.conf can set this to 5 seconds and really cut down on the time to wait. Part of a comment was also removed due to being incorrect. Even with neighbor reports IWD still must scan, its just that the scan is more limited and, in theory, faster.
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device.wait_for_event('no-roam-candidates')
auto-t: add test for roaming retry timing Recent changes make iwd more eager to retry roaming if it has detected a high RSSI since the last attempt. Add an autotest to verify this behaviour.
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self.assertEqual(device.state, iwd.DeviceState.connected)
auto-t: fixup testRoamRetry for better timing reliability Change a few critical checks that were failing sometimes: - A few asserts were changed to wait_for_object_condition - A 15 second timeout was removed (default used instead) - Do a full scan at beginning of each test to clear any cached BSS's. The second test run was getting stale results and the RSSI values were not expected.
2022-03-28 19:28:34 +02:00
auto-t: add test for roaming retry timing Recent changes make iwd more eager to retry roaming if it has detected a high RSSI since the last attempt. Add an autotest to verify this behaviour.
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self.assertTrue(bss_hostapd[0].list_sta())
self.assertFalse(bss_hostapd[1].list_sta())
testutil.test_iface_operstate(device.name)
testutil.test_ifaces_connected(bss_hostapd[0].ifname, device.name)
# Assert high signal for BSS 0 again. This clears the way for a faster
# roam attempt on LOW again
rule0.signal = -5000
# Wait a little for signal recognition
wd.wait(1)
# Assert low signal for BSS 0, check that iwd starts transition to BSS 1
rule0.signal = -8000
rule1.signal = -2000
condition = 'obj.state == DeviceState.roaming'
auto-t: fixup testRoamRetry for better timing reliability Change a few critical checks that were failing sometimes: - A few asserts were changed to wait_for_object_condition - A 15 second timeout was removed (default used instead) - Do a full scan at beginning of each test to clear any cached BSS's. The second test run was getting stale results and the RSSI values were not expected.
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wd.wait_for_object_condition(device, condition)
auto-t: add test for roaming retry timing Recent changes make iwd more eager to retry roaming if it has detected a high RSSI since the last attempt. Add an autotest to verify this behaviour.
2021-01-27 11:05:00 +01:00
# Check that iwd is on BSS 1 once out of roaming state and doesn't
# go through 'disconnected', 'autoconnect', 'connecting' in between
auto-t: update roaming tests with wait_for_object_change Every single roaming test had one of two problems with watching the state change between roaming --> connected. Either the test used wait_for_object_condition to wait for 'connected' which could allow other states in between. Or it simply used an assert. The assert wouldn't allow other state changes, but at the cost of potentially failing due to IWD not having made it to the 'connected' state yet. Now we have wait_for_object_change which takes two conditions: initial (from_str) and expected (to_str). This API will not allow any other conditions except these, and will wait for the expected condition before continuing. This allows roaming test to reliably wait for the roaming --> connected state change.
2021-02-05 20:06:37 +01:00
from_condition = 'obj.state == DeviceState.roaming'
to_condition = 'obj.state == DeviceState.connected'
wd.wait_for_object_change(device, from_condition, to_condition)
auto-t: add test for roaming retry timing Recent changes make iwd more eager to retry roaming if it has detected a high RSSI since the last attempt. Add an autotest to verify this behaviour.
2021-01-27 11:05:00 +01:00
auto-t: fixup testRoamRetry for better timing reliability Change a few critical checks that were failing sometimes: - A few asserts were changed to wait_for_object_condition - A 15 second timeout was removed (default used instead) - Do a full scan at beginning of each test to clear any cached BSS's. The second test run was getting stale results and the RSSI values were not expected.
2022-03-28 19:28:34 +02:00
bss_hostapd[1].wait_for_event('AP-STA-CONNECTED %s' % device.address)
auto-t: add test for roaming retry timing Recent changes make iwd more eager to retry roaming if it has detected a high RSSI since the last attempt. Add an autotest to verify this behaviour.
2021-01-27 11:05:00 +01:00
device.disconnect()
condition = 'not obj.connected'
wd.wait_for_object_condition(ordered_network.network_object, condition)
wd.unregister_psk_agent(psk_agent)
rule0.remove()
rule1.remove()
@classmethod
def setUpClass(cls):
pass
@classmethod
def tearDownClass(cls):
IWD.clear_storage()
if __name__ == '__main__':
unittest.main(exit=True)
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