Add dev option for enhanced mac randomization

This toggle will affect client mode mac randomization only.
When toggled on, during association to networks that have MAC
randomization turned on, a more random MAC (as opposed to persistent
MAC per-network) would be used.

Bug: 151983183
Test: Manual
Change-Id: I4affade362644037e649ac6cf93e6871a81058bc

1 files changed, 73 insertions, 0 deletions

diff --git a/src/com/android/settings/development/WifiEnhancedMacRandomizationPreferenceController.java b/src/com/android/settings/development/WifiEnhancedMacRandomizationPreferenceController.java
new file mode 100644
index 0000000000..af44f5b202
--- /dev/null
+++ b/src/com/android/settings/development/WifiEnhancedMacRandomizationPreferenceController.java
@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2020 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.development;
+
+import android.content.Context;
+import android.provider.Settings;
+
+import androidx.preference.Preference;
+import androidx.preference.SwitchPreference;
+
+import com.android.settings.core.PreferenceControllerMixin;
+import com.android.settingslib.development.DeveloperOptionsPreferenceController;
+
+/**
+ * Developer option controller for enhanced MAC randomization.
+ */
+public class WifiEnhancedMacRandomizationPreferenceController
+        extends DeveloperOptionsPreferenceController
+        implements Preference.OnPreferenceChangeListener, PreferenceControllerMixin {
+    private static final String WIFI_ENHANCED_MAC_RANDOMIZATION_KEY =
+            "wifi_enhanced_mac_randomization";
+    private static final String ENHANCED_MAC_RANDOMIZATION_FEATURE_FLAG =
+            "enhanced_mac_randomization_force_enabled";
+
+    public WifiEnhancedMacRandomizationPreferenceController(Context context) {
+        super(context);
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return WIFI_ENHANCED_MAC_RANDOMIZATION_KEY;
+    }
+
+    @Override
+    public boolean onPreferenceChange(Preference preference, Object newValue) {
+        int isEnabledInt = ((Boolean) newValue) ? 1 : 0;
+        Settings.Global.putInt(mContext.getContentResolver(),
+                ENHANCED_MAC_RANDOMIZATION_FEATURE_FLAG, isEnabledInt);
+        return true;
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        boolean enabled = false;
+        if (Settings.Global.getInt(mContext.getContentResolver(),
+                ENHANCED_MAC_RANDOMIZATION_FEATURE_FLAG, 0) == 1) {
+            enabled = true;
+        }
+        ((SwitchPreference) mPreference).setChecked(enabled);
+    }
+
+    @Override
+    protected void onDeveloperOptionsSwitchDisabled() {
+        super.onDeveloperOptionsSwitchDisabled();
+        Settings.Global.putInt(mContext.getContentResolver(),
+                ENHANCED_MAC_RANDOMIZATION_FEATURE_FLAG, 0);
+        ((SwitchPreference) mPreference).setChecked(false);
+    }
+}