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Commit 6ee73daa authored by Erik Kline's avatar Erik Kline
Browse files

Stop unnecessary tethering reconfigurations 

The TetheringConfiguraiton is retrieved at startup and on every
ACTION_CONFIGURATION_CHANGED broadcast.  Re-retrieving the config
at every upstream selection is unnecessary and fills up the logs.

Test: as follows
    - built
    - flashed
    - booted
    - "runtest frameworks-net" passes
Bug: 32163131
Bug: 63250751
Change-Id: Ia6276ada690aa3e4870bb83dc4bf3ddcddc35e7b
parent e72ec3ca

services/core/java/com/android/server/connectivity/Tethering.java

+9 −1
Original line number Diff line number Diff line
@@ -255,6 +255,12 @@ public class Tethering extends BaseNetworkObserver { 
        mUpstreamNetworkMonitor.updateMobileRequiresDun(mConfig.isDunRequired);

    }



    private void maybeUpdateConfiguration() {

        final int dunCheck = TetheringConfiguration.checkDunRequired(mContext);

        if (dunCheck == mConfig.dunCheck) return;

        updateConfiguration();

    }



    @Override

    public void interfaceStatusChanged(String iface, boolean up) {

        // Never called directly: only called from interfaceLinkStateChanged.
@@ -1283,7 +1289,9 @@ public class Tethering extends BaseNetworkObserver { 
        }



        protected void chooseUpstreamType(boolean tryCell) {

            updateConfiguration(); // TODO - remove?

            // We rebuild configuration on ACTION_CONFIGURATION_CHANGED, but we

            // do not currently know how to watch for changes in DUN settings.

            maybeUpdateConfiguration();



            final NetworkState ns = mUpstreamNetworkMonitor.selectPreferredUpstreamType(

                    mConfig.preferredUpstreamIfaceTypes);

services/core/java/com/android/server/connectivity/tethering/TetheringConfiguration.java

+3 −2
Original line number Diff line number Diff line
@@ -70,6 +70,7 @@ public class TetheringConfiguration { 
    public final String[] tetherableUsbRegexs;

    public final String[] tetherableWifiRegexs;

    public final String[] tetherableBluetoothRegexs;

    public final int dunCheck;

    public final boolean isDunRequired;

    public final Collection<Integer> preferredUpstreamIfaceTypes;

    public final String[] dhcpRanges;
@@ -88,7 +89,7 @@ public class TetheringConfiguration { 
        tetherableBluetoothRegexs = ctx.getResources().getStringArray(

                com.android.internal.R.array.config_tether_bluetooth_regexs);



        final int dunCheck = checkDunRequired(ctx);

        dunCheck = checkDunRequired(ctx);

        configLog.log("DUN check returned: " + dunCheckString(dunCheck));



        preferredUpstreamIfaceTypes = getUpstreamIfaceTypes(ctx, dunCheck);
@@ -175,7 +176,7 @@ public class TetheringConfiguration { 
        return upstreamNames;

    }



    private static int checkDunRequired(Context ctx) {

    public static int checkDunRequired(Context ctx) {

        final TelephonyManager tm = (TelephonyManager) ctx.getSystemService(TELEPHONY_SERVICE);

        return (tm != null) ? tm.getTetherApnRequired() : DUN_UNSPECIFIED;

    }