tests: Verify RSN preauth with dynamic VLANs

This change add two new tests to verify hostapd operation when used with
VLANs. Both are based on pmksa_cache_preauth and enable dynamic VLANs,
pmksa_cache_preauth_vlan_used additionally uses a station with VID 1.

Signed-off-by: Michael Braun <michael-dev@fami-braun.de>

tests/hwsim/hostapd.wlan3.vlan

@@ -0,0 +1 @@
+1	wlan3.1

tests/hwsim/hostapd.wlan4.vlan

@@ -0,0 +1 @@
+1	wlan4.1

tests/hwsim/test_pmksa_cache.py

@@ -386,6 +386,142 @@ def test_pmksa_cache_preauth(dev, apdev):
         subprocess.call(['ip', 'link', 'set', 'dev', 'ap-br0', 'down'])
         subprocess.call(['brctl', 'delbr', 'ap-br0'])
 
+def test_pmksa_cache_preauth_vlan_enabled(dev, apdev):
+    """RSN pre-authentication to generate PMKSA cache entry (dynamic_vlan optional but station without VLAN set)"""
+    try:
+        params = hostapd.wpa2_eap_params(ssid="test-wpa2-eap")
+        params['bridge'] = 'ap-br0'
+        params['dynamic_vlan'] = '1'
+        hostapd.add_ap(apdev[0]['ifname'], params)
+        subprocess.call(['brctl', 'setfd', 'ap-br0', '0'])
+        subprocess.call(['ip', 'link', 'set', 'dev', 'ap-br0', 'up'])
+        eap_connect(dev[0], apdev[0], "PAX", "pax.user@example.com",
+                    password_hex="0123456789abcdef0123456789abcdef")
+
+        params = hostapd.wpa2_eap_params(ssid="test-wpa2-eap")
+        params['bridge'] = 'ap-br0'
+        params['rsn_preauth'] = '1'
+        params['rsn_preauth_interfaces'] = 'ap-br0'
+        params['dynamic_vlan'] = '1'
+        hostapd.add_ap(apdev[1]['ifname'], params)
+        bssid1 = apdev[1]['bssid']
+        dev[0].scan(freq="2412")
+        success = False
+        status_seen = False
+        for i in range(0, 50):
+            if not status_seen:
+                status = dev[0].request("STATUS")
+                if "Pre-authentication EAPOL state machines:" in status:
+                    status_seen = True
+            time.sleep(0.1)
+            pmksa = dev[0].get_pmksa(bssid1)
+            if pmksa:
+                success = True
+                break
+        if not success:
+            raise Exception("No PMKSA cache entry created from pre-authentication")
+        if not status_seen:
+            raise Exception("Pre-authentication EAPOL status was not available")
+
+        dev[0].scan(freq="2412")
+        if "[WPA2-EAP-CCMP-preauth]" not in dev[0].request("SCAN_RESULTS"):
+            raise Exception("Scan results missing RSN element info")
+        dev[0].request("ROAM " + bssid1)
+        ev = dev[0].wait_event(["CTRL-EVENT-EAP-STARTED",
+                                "CTRL-EVENT-CONNECTED"], timeout=10)
+        if ev is None:
+            raise Exception("Roaming with the AP timed out")
+        if "CTRL-EVENT-EAP-STARTED" in ev:
+            raise Exception("Unexpected EAP exchange")
+        pmksa2 = dev[0].get_pmksa(bssid1)
+        if pmksa2 is None:
+            raise Exception("No PMKSA cache entry")
+        if pmksa['pmkid'] != pmksa2['pmkid']:
+            raise Exception("Unexpected PMKID change")
+
+    finally:
+        subprocess.call(['ip', 'link', 'set', 'dev', 'ap-br0', 'down'])
+        subprocess.call(['brctl', 'delbr', 'ap-br0'])
+
+def test_pmksa_cache_preauth_vlan_used(dev, apdev):
+    """RSN pre-authentication to generate PMKSA cache entry (station with VLAN set)"""
+    try:
+        subprocess.call(['brctl', 'addbr', 'brvlan1'])
+        subprocess.call(['brctl', 'setfd', 'brvlan1', '0'])
+        params = hostapd.wpa2_eap_params(ssid="test-wpa2-eap")
+        params['bridge'] = 'ap-br0'
+        params['dynamic_vlan'] = '1'
+        params['vlan_file'] = 'hostapd.wlan3.vlan'
+        hapd = hostapd.add_ap(apdev[0]['ifname'], params)
+        subprocess.call(['brctl', 'setfd', 'ap-br0', '0'])
+        subprocess.call(['ip', 'link', 'set', 'dev', 'ap-br0', 'up'])
+        eap_connect(dev[0], apdev[0], "PAX", "vlan1",
+                    password_hex="0123456789abcdef0123456789abcdef")
+
+        params = hostapd.wpa2_eap_params(ssid="test-wpa2-eap")
+        params['bridge'] = 'ap-br0'
+        params['rsn_preauth'] = '1'
+        params['rsn_preauth_interfaces'] = 'brvlan1'
+        params['dynamic_vlan'] = '1'
+        params['vlan_file'] = 'hostapd.wlan4.vlan'
+        hostapd.add_ap(apdev[1]['ifname'], params)
+        bssid1 = apdev[1]['bssid']
+        dev[0].scan(freq="2412")
+        success = False
+        status_seen = False
+        for i in range(0, 50):
+            if not status_seen:
+                status = dev[0].request("STATUS")
+                if "Pre-authentication EAPOL state machines:" in status:
+                    status_seen = True
+            time.sleep(0.1)
+            pmksa = dev[0].get_pmksa(bssid1)
+            if pmksa:
+                success = True
+                break
+        if not success:
+            raise Exception("No PMKSA cache entry created from pre-authentication")
+        if not status_seen:
+            raise Exception("Pre-authentication EAPOL status was not available")
+
+        dev[0].scan(freq="2412")
+        if "[WPA2-EAP-CCMP-preauth]" not in dev[0].request("SCAN_RESULTS"):
+            raise Exception("Scan results missing RSN element info")
+        dev[0].request("ROAM " + bssid1)
+        ev = dev[0].wait_event(["CTRL-EVENT-EAP-STARTED",
+                                "CTRL-EVENT-CONNECTED"], timeout=10)
+        if ev is None:
+            raise Exception("Roaming with the AP timed out")
+        if "CTRL-EVENT-EAP-STARTED" in ev:
+            raise Exception("Unexpected EAP exchange")
+        pmksa2 = dev[0].get_pmksa(bssid1)
+        if pmksa2 is None:
+            raise Exception("No PMKSA cache entry")
+        if pmksa['pmkid'] != pmksa2['pmkid']:
+            raise Exception("Unexpected PMKID change")
+
+        # Disconnect the STA from both APs to avoid forceful ifdown by the
+        # test script on a VLAN that this has an associated STA. That used to
+        # trigger a mac80211 warning.
+        dev[0].request("DISCONNECT")
+        hapd.request("DISABLE")
+
+    finally:
+        subprocess.call(['ip', 'link', 'set', 'dev', 'ap-br0', 'down'],
+                        stderr=open('/dev/null', 'w'))
+        subprocess.call(['ip', 'link', 'set', 'dev', 'brvlan1', 'down'])
+        subprocess.call(['ip', 'link', 'set', 'dev', 'wlan3.1', 'down'],
+                        stderr=open('/dev/null', 'w'))
+        subprocess.call(['ip', 'link', 'set', 'dev', 'wlan4.1', 'down'],
+                        stderr=open('/dev/null', 'w'))
+        subprocess.call(['brctl', 'delif', 'brvlan1', 'wlan3.1'],
+                        stderr=open('/dev/null', 'w'))
+        subprocess.call(['brctl', 'delif', 'brvlan1', 'wlan4.1'],
+                        stderr=open('/dev/null', 'w'))
+        subprocess.call(['brctl', 'delbr', 'ap-br0'],
+                        stderr=open('/dev/null', 'w'))
+        subprocess.call(['brctl', 'delbr', 'brvlan1'])
+
 def test_pmksa_cache_disabled(dev, apdev):
     """PMKSA cache disabling on AP"""
     params = hostapd.wpa2_eap_params(ssid="test-pmksa-cache")