auto-t: add test for stopping periodic roam retries

autotests/testRoamRetry/stop_retry_test.py

@@ -0,0 +1,131 @@
+#!/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):
+    # Test that we do not periodically retry roaming if the transision looks
+    # like this: LOW [roam] [new bss] HIGH.
+    def test_stop_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
+
+        rule1 = hwsim.rules.create()
+        rule1.source = bss_radio[1].addresses[0]
+        rule1.bidirectional = True
+
+        # 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 = -5000
+
+        wd = IWD()
+
+        psk_agent = PSKAgent("secret123")
+        wd.register_psk_agent(psk_agent)
+
+        devices = wd.list_devices(1)
+        device = devices[0]
+
+        condition = 'not obj.scanning'
+        wd.wait_for_object_condition(device, condition)
+
+        device.scan()
+
+        condition = 'not obj.scanning'
+        wd.wait_for_object_condition(device, condition)
+
+        ordered_network = device.get_ordered_network('TestRoamRetry')
+
+        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)
+
+        self.assertTrue(bss_hostapd[0].list_sta())
+        self.assertFalse(bss_hostapd[1].list_sta())
+
+        # Now push the signal below the RSSI threshold and check that iwd
+        # connects to BSS 1
+        rule0.signal = -8000
+
+        condition = 'obj.state == DeviceState.roaming'
+        wd.wait_for_object_condition(device, condition)
+
+        # Check that iwd is on BSS 1 once out of roaming state and doesn't
+        # go through 'disconnected', 'autoconnect', 'connecting' in between
+        condition = 'obj.state != DeviceState.roaming'
+        wd.wait_for_object_condition(device, condition)
+
+        self.assertEqual(device.state, iwd.DeviceState.connected)
+        self.assertTrue(bss_hostapd[1].list_sta())
+
+        # Now make sure that we don't roam anymore. In order to catch this via
+        # DeviceState, a suitable roaming target needs to be available. So jack
+        # up the RSSI of BSS 0 again. The retry interval is 60 seconds, so we
+        # should have roamed within that timeframe. Wait just a little longer
+        # to account for the slowness of the autotest environment.
+        rule0.signal = -2000
+
+        condition = 'obj.state == DeviceState.roaming'
+        self.assertRaises(TimeoutError, wd.wait_for_object_condition, device,
+                          condition, max_wait=70)
+
+        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)