From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Dmitry Muhomor <muhomor.dmitry@gmail.com>
Date: Fri, 10 Feb 2023 12:54:21 +0200
Subject: [PATCH] add a setting for forcibly disabling SUPL

Change-Id: I5c31c319d198f09ace493e601278f8224a259f05
---
 core/java/android/provider/Settings.java         |  9 +++++++++
 .../server/location/gnss/GnssConfiguration.java  | 16 ++++++++++++++++
 .../location/gnss/GnssLocationProvider.java      | 15 +++++++++++++++
 3 files changed, 40 insertions(+)

diff --git a/core/java/android/provider/Settings.java b/core/java/android/provider/Settings.java
index 6692d09c17c4..cff4ec23b844 100644
--- a/core/java/android/provider/Settings.java
+++ b/core/java/android/provider/Settings.java
@@ -17369,6 +17369,15 @@ public final class Settings {
          */
         public static final String SETTINGS_REBOOT_AFTER_TIMEOUT = "settings_reboot_after_timeout";
 
+        /**
+         * Force disable Secure User Plane Location (SUPL), 0 or 1.
+         * @hide
+         */
+        public static final String FORCE_DISABLE_SUPL = "force_disable_supl";
+
+        /** @hide */
+        public static final int FORCE_DISABLE_SUPL_DEFAULT = 0;
+
         /**
          * The amount of time in milliseconds before a disconnected Wi-Fi adapter is turned off
          * @hide
diff --git a/services/core/java/com/android/server/location/gnss/GnssConfiguration.java b/services/core/java/com/android/server/location/gnss/GnssConfiguration.java
index 1435016fc55a..db8131729555 100644
--- a/services/core/java/com/android/server/location/gnss/GnssConfiguration.java
+++ b/services/core/java/com/android/server/location/gnss/GnssConfiguration.java
@@ -19,11 +19,13 @@ package com.android.server.location.gnss;
 import android.content.Context;
 import android.os.PersistableBundle;
 import android.os.SystemProperties;
+import android.provider.Settings;
 import android.telephony.CarrierConfigManager;
 import android.telephony.SubscriptionManager;
 import android.telephony.TelephonyManager;
 import android.text.TextUtils;
 import android.util.Log;
+import android.util.Slog;
 
 import com.android.internal.util.FrameworkStatsLog;
 
@@ -274,6 +276,9 @@ public class GnssConfiguration {
          * Overlay carrier properties from a debug configuration file.
          */
         loadPropertiesFromGpsDebugConfig(mProperties);
+
+        applyConfigOverrides(mContext, mProperties);
+
         mEsExtensionSec = getRangeCheckedConfigEsExtensionSec();
 
         logConfigurations();
@@ -476,4 +481,15 @@ public class GnssConfiguration {
     private static native boolean native_set_satellite_blocklist(int[] constellations, int[] svIds);
 
     private static native boolean native_set_es_extension_sec(int emergencyExtensionSeconds);
+
+    private static void applyConfigOverrides(Context ctx, Properties props) {
+        String key = Settings.Global.FORCE_DISABLE_SUPL;
+        int def = Settings.Global.FORCE_DISABLE_SUPL_DEFAULT;
+        if (Settings.Global.getInt(ctx.getContentResolver(), key, def) == 1) {
+            props.setProperty(CONFIG_SUPL_MODE, "0");
+            Slog.d(TAG, "SUPL is force disabled");
+        } else {
+            Slog.d(TAG, "SUPL is not force disabled");
+        }
+    }
 }
diff --git a/services/core/java/com/android/server/location/gnss/GnssLocationProvider.java b/services/core/java/com/android/server/location/gnss/GnssLocationProvider.java
index 3a3504528b97..ed737760779b 100644
--- a/services/core/java/com/android/server/location/gnss/GnssLocationProvider.java
+++ b/services/core/java/com/android/server/location/gnss/GnssLocationProvider.java
@@ -100,6 +100,7 @@ import android.telephony.TelephonyManager;
 import android.text.TextUtils;
 import android.text.format.DateUtils;
 import android.util.Log;
+import android.util.Slog;
 import android.util.TimeUtils;
 
 import com.android.internal.annotations.GuardedBy;
@@ -482,6 +483,20 @@ public class GnssLocationProvider extends AbstractLocationProvider implements
         mGnssNative.setNotificationCallbacks(this);
         mGnssNative.setLocationRequestCallbacks(this);
         mGnssNative.setTimeCallbacks(this);
+
+        mContext.getContentResolver().registerContentObserver(
+                Settings.Global.getUriFor(Settings.Global.FORCE_DISABLE_SUPL),
+                false, new ContentObserver(mHandler) {
+            @Override
+            public void onChange(boolean selfChange) {
+                var cr = mContext.getContentResolver();
+                String key = Settings.Global.FORCE_DISABLE_SUPL;
+                int def = Settings.Global.FORCE_DISABLE_SUPL_DEFAULT;
+
+                Slog.d(TAG, "FORCE_DISABLE_SUPL changed, value: " + Settings.Global.getInt(cr, key, def));
+                mGnssConfiguration.reloadGpsProperties();
+            }
+        });
     }
 
     /** Called when system is ready. */