tests: External MAC address change

Signed-off-by: Jouni Malinen <j@w1.fi>

tests/hwsim/test_sta_dynamic.py

@@ -109,6 +109,43 @@ def test_sta_dynamic_down_up(dev, apdev):
         raise Exception("Reconnection not reported")
     hwsim_utils.test_connectivity(wpas.ifname, apdev[0]['ifname'])
 
+def test_sta_dynamic_ext_mac_addr_change(dev, apdev):
+    """Dynamically added wpa_supplicant interface with external MAC address change"""
+    params = hostapd.wpa2_params(ssid="sta-dynamic", passphrase="12345678")
+    hapd = hostapd.add_ap(apdev[0]['ifname'], params)
+
+    logger.info("Create a dynamic wpa_supplicant interface and connect")
+    wpas = WpaSupplicant(global_iface='/tmp/wpas-wlan5')
+    wpas.interface_add("wlan5")
+    wpas.connect("sta-dynamic", psk="12345678", scan_freq="2412")
+    hwsim_utils.test_connectivity(wpas.ifname, apdev[0]['ifname'])
+    subprocess.call(['sudo', 'ifconfig', wpas.ifname, 'down'])
+    ev = wpas.wait_event(["CTRL-EVENT-DISCONNECTED"], timeout=10)
+    if ev is None:
+        raise Exception("Disconnection not reported")
+    if wpas.get_status_field("wpa_state") != "INTERFACE_DISABLED":
+        raise Exception("Unexpected wpa_state")
+    prev_addr = wpas.p2p_interface_addr()
+    new_addr = '02:11:22:33:44:55'
+    try:
+        subprocess.call(['sudo', 'ip', 'link', 'set', 'dev', wpas.ifname,
+                         'address', new_addr])
+        subprocess.call(['sudo', 'ifconfig', wpas.ifname, 'up'])
+        ev = wpas.wait_event(["CTRL-EVENT-CONNECTED"], timeout=15)
+        if ev is None:
+            raise Exception("Reconnection not reported")
+        if wpas.get_driver_status_field('addr') != new_addr:
+            raise Exception("Address change not reported")
+        hwsim_utils.test_connectivity(wpas.ifname, apdev[0]['ifname'])
+        sta = hapd.get_sta(new_addr)
+        if sta['addr'] != new_addr:
+            raise Exception("STA association with new address not found")
+    finally:
+        subprocess.call(['sudo', 'ifconfig', wpas.ifname, 'down'])
+        subprocess.call(['sudo', 'ip', 'link', 'set', 'dev', wpas.ifname,
+                         'address', prev_addr])
+        subprocess.call(['sudo', 'ifconfig', wpas.ifname, 'up'])
+
 def test_sta_dynamic_random_mac_addr(dev, apdev):
     """Dynamically added wpa_supplicant interface and random MAC address"""
     params = hostapd.wpa2_params(ssid="sta-dynamic", passphrase="12345678")