WiFi restricted connection when scan QR code

- Use WifiEntry#canConnect() to determine if the network can be
  connected.

- Add WiFi network but don't connect if WiFi restricted connection.

- See the result screenshot in b/203168943#comment16

Bug: 203168938
Bug: 203168943
Test: manual test
make RunSettingsRoboTests \
  ROBOTEST_FILTER=WifiDppQrCodeScannerFragmentTest

Change-Id: I06d1e832176e540ddd1adce8da46ef8659534ab7

src/com/android/settings/wifi/dpp/WifiDppQrCodeScannerFragment.java

@@ -117,7 +117,8 @@ public class WifiDppQrCodeScannerFragment extends WifiDppQrCodeBaseFragment impl
 
     private int mLatestStatusCode = WifiDppUtils.EASY_CONNECT_EVENT_FAILURE_NONE;
 
-    private WifiPickerTracker mWifiPickerTracker;
+    @VisibleForTesting
+    WifiPickerTracker mWifiPickerTracker;
     private HandlerThread mWorkerThread;
 
     private final Handler mHandler = new Handler() {
@@ -193,6 +194,9 @@ public class WifiDppQrCodeScannerFragment extends WifiDppQrCodeBaseFragment impl
                         if (id == -1) {
                             continue;
                         }
+
+                        if (!canConnectWifi(qrCodeWifiConfiguration.SSID)) return;
+
                         wifiManager.enableNetwork(id, /* attemptConnect */ false);
                         // WifiTracker only contains a hidden SSID Wi-Fi network if it's saved.
                         // We can't check if a hidden SSID Wi-Fi network is reachable in advance.
@@ -266,6 +270,21 @@ public class WifiDppQrCodeScannerFragment extends WifiDppQrCodeBaseFragment impl
         return false;
     }
 
+    @VisibleForTesting
+    boolean canConnectWifi(String ssid) {
+        final List<WifiEntry> wifiEntries = mWifiPickerTracker.getWifiEntries();
+        for (WifiEntry wifiEntry : wifiEntries) {
+            if (!TextUtils.equals(wifiEntry.getSsid(), sanitizeSsid(ssid))) continue;
+
+            if (!wifiEntry.canConnect()) {
+                Log.w(TAG, "Wi-Fi is not allowed to connect by your organization. SSID:" + ssid);
+                showErrorMessageAndRestartCamera(R.string.not_allowed_by_ent);
+                return false;
+            }
+        }
+        return true;
+    }
+
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -575,7 +594,8 @@ public class WifiDppQrCodeScannerFragment extends WifiDppQrCodeBaseFragment impl
         message.sendToTarget();
     }
 
-    private void showErrorMessageAndRestartCamera(@StringRes int messageResId) {
+    @VisibleForTesting
+    void showErrorMessageAndRestartCamera(@StringRes int messageResId) {
         final Message message = mHandler.obtainMessage(MESSAGE_SHOW_ERROR_MESSAGE,
                 getString(messageResId));
         message.arg1 = ARG_RESTART_CAMERA;
@@ -603,6 +623,7 @@ public class WifiDppQrCodeScannerFragment extends WifiDppQrCodeBaseFragment impl
                 if (wifiConfig.networkId == newNetworkId) {
                     mLatestStatusCode = WifiDppUtils.EASY_CONNECT_EVENT_SUCCESS;
                     mEnrolleeWifiConfiguration = wifiConfig;
+                    if (!canConnectWifi(wifiConfig.SSID)) return;
                     wifiManager.connect(wifiConfig, WifiDppQrCodeScannerFragment.this);
                     return;
                 }

tests/robotests/src/com/android/settings/wifi/dpp/WifiDppQrCodeScannerFragmentTest.java

@@ -0,0 +1,87 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.wifi.dpp;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.ArgumentMatchers.anyInt;
+import static org.mockito.Mockito.doNothing;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import com.android.wifitrackerlib.WifiEntry;
+import com.android.wifitrackerlib.WifiPickerTracker;
+
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.junit.MockitoJUnit;
+import org.mockito.junit.MockitoRule;
+import org.robolectric.RobolectricTestRunner;
+
+import java.util.Arrays;
+
+@RunWith(RobolectricTestRunner.class)
+public class WifiDppQrCodeScannerFragmentTest {
+
+    static final String WIFI_SSID = "wifi-ssid";
+
+    @Rule
+    public final MockitoRule mMockitoRule = MockitoJUnit.rule();
+    @Mock
+    WifiPickerTracker mWifiPickerTracker;
+    @Mock
+    WifiEntry mWifiEntry;
+
+    WifiDppQrCodeScannerFragment mFragment;
+
+    @Before
+    public void setUp() {
+        when(mWifiEntry.getSsid()).thenReturn(WIFI_SSID);
+        when(mWifiPickerTracker.getWifiEntries()).thenReturn(Arrays.asList(mWifiEntry));
+
+        mFragment = spy(new WifiDppQrCodeScannerFragment());
+        mFragment.mWifiPickerTracker = mWifiPickerTracker;
+    }
+
+    @Test
+    public void canConnectWifi_noAvailableWifiMatch_returnTrue() {
+        when(mWifiEntry.getSsid()).thenReturn("diff-wifi-ssid");
+        when(mWifiEntry.canConnect()).thenReturn(false);
+
+        assertThat(mFragment.canConnectWifi(WIFI_SSID)).isTrue();
+    }
+
+    @Test
+    public void canConnectWifi_wifiCanConnect_returnTrue() {
+        when(mWifiEntry.canConnect()).thenReturn(true);
+
+        assertThat(mFragment.canConnectWifi(WIFI_SSID)).isTrue();
+    }
+
+    @Test
+    public void canConnectWifi_wifiCanNotConnect_returnFalseAndShowError() {
+        when(mWifiEntry.canConnect()).thenReturn(false);
+        doNothing().when(mFragment).showErrorMessageAndRestartCamera(anyInt());
+
+        assertThat(mFragment.canConnectWifi(WIFI_SSID)).isFalse();
+        verify(mFragment).showErrorMessageAndRestartCamera(anyInt());
+    }
+}