Display Mac address of active network interface in Settings/About/Status

This can be a Wifi or ethernet connection

Bug: 286409648
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:36df96c97ab79f9248b38a1aaa1f265544734932)
Merged-In: I46a25eeee97040c28724830d2a390ef50d623075
Change-Id: I46a25eeee97040c28724830d2a390ef50d623075

3 files changed, 94 insertions, 34 deletions

diff --git a/Settings/src/com/android/tv/settings/about/MacAddressPreferenceController.java b/Settings/src/com/android/tv/settings/about/MacAddressPreferenceController.java
new file mode 100644
index 000000000..b8a31dc25
--- /dev/null
+++ b/Settings/src/com/android/tv/settings/about/MacAddressPreferenceController.java
@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) 2017 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.tv.settings.about;
+
+import android.content.Context;
+import android.net.ConnectivityManager;
+import android.net.LinkProperties;
+import android.net.Network;
+import android.net.NetworkCapabilities;
+import android.util.Log;
+
+import androidx.preference.Preference;
+import androidx.preference.PreferenceScreen;
+
+import com.android.settingslib.core.lifecycle.Lifecycle;
+import com.android.settingslib.deviceinfo.AbstractWifiMacAddressPreferenceController;
+
+import java.net.NetworkInterface;
+import java.net.SocketException;
+import java.util.Collections;
+
+/**
+ * Concrete subclass of WIFI MAC address preference controller
+ */
+public class MacAddressPreferenceController extends AbstractWifiMacAddressPreferenceController {
+    private static final String TAG = "MacAddressPC";
+
+    private final ConnectivityManager mConnectivityManager;
+    private Preference mMacAddress;
+
+    public MacAddressPreferenceController(Context context, Lifecycle lifecycle) {
+        super(context, lifecycle);
+        mConnectivityManager = context.getSystemService(ConnectivityManager.class);
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        mMacAddress = screen.findPreference(getPreferenceKey());
+        super.displayPreference(screen);
+    }
+
+    @Override
+    protected void updateConnectivity() {
+        Network activeNetwork = mConnectivityManager.getActiveNetwork();
+        NetworkCapabilities networkCapabilities = activeNetwork != null
+                ? mConnectivityManager.getNetworkCapabilities(activeNetwork) : null;
+        LinkProperties linkProperties = activeNetwork != null
+                ? mConnectivityManager.getLinkProperties(activeNetwork) : null;
+        if (mMacAddress == null || networkCapabilities == null || linkProperties == null
+                || linkProperties.getInterfaceName() == null
+                || !networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_ETHERNET)) {
+            super.updateConnectivity();
+            return;
+        }
+
+        // Find ethernet mac address from system.
+        try {
+            for (NetworkInterface networkInterface :
+                    Collections.list(NetworkInterface.getNetworkInterfaces())) {
+                byte[] mac = networkInterface.getHardwareAddress();
+                if (mac != null && linkProperties.getInterfaceName().equalsIgnoreCase(
+                        networkInterface.getName())) {
+                    StringBuilder macString = new StringBuilder();
+                    for (byte b : mac) {
+                        macString.append(String.format(macString.length() == 0
+                                ? "%02X" : ":%02X", b));
+                    }
+                    mMacAddress.setSummary(macString);
+                    return;
+                }
+
+            }
+        } catch (SocketException e) {
+            Log.e(TAG, "Unable to list network interfaces", e);
+        }
+
+        super.updateConnectivity();
+    }
+}
diff --git a/Settings/src/com/android/tv/settings/about/StatusFragment.java b/Settings/src/com/android/tv/settings/about/StatusFragment.java
index e6d0db050..5c7df850a 100644
--- a/Settings/src/com/android/tv/settings/about/StatusFragment.java
+++ b/Settings/src/com/android/tv/settings/about/StatusFragment.java
@@ -61,7 +61,7 @@ public class StatusFragment extends PreferenceControllerFragment {
         controllers.add(new UptimePreferenceController(context, lifecycle));
         controllers.add(new BluetoothAddressPreferenceController(context, lifecycle));
         controllers.add(new IpAddressPreferenceController(context, lifecycle));
-        controllers.add(new WifiMacAddressPreferenceController(context, lifecycle));
+        controllers.add(new MacAddressPreferenceController(context, lifecycle));
         controllers.add(new ImsStatusPreferenceController(context, lifecycle));
 
         return controllers;
diff --git a/Settings/src/com/android/tv/settings/about/WifiMacAddressPreferenceController.java b/Settings/src/com/android/tv/settings/about/WifiMacAddressPreferenceController.java
deleted file mode 100644
index f234a2b5f..000000000
--- a/Settings/src/com/android/tv/settings/about/WifiMacAddressPreferenceController.java
+++ /dev/null
@@ -1,33 +0,0 @@
-/*
- * Copyright (C) 2017 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.tv.settings.about;
-
-import android.content.Context;
-
-import com.android.settingslib.core.lifecycle.Lifecycle;
-import com.android.settingslib.deviceinfo.AbstractWifiMacAddressPreferenceController;
-
-/**
- * Concrete subclass of WIFI MAC address preference controller
- */
-public class WifiMacAddressPreferenceController extends AbstractWifiMacAddressPreferenceController {
-    public WifiMacAddressPreferenceController(Context context, Lifecycle lifecycle) {
-        super(context, lifecycle);
-    }
-
-    // This space intentionally left blank
-}