diff --git a/Tethering/apex/Android.bp b/Tethering/apex/Android.bp
index 19dd492..2878f79 100644
--- a/Tethering/apex/Android.bp
+++ b/Tethering/apex/Android.bp
@@ -102,15 +102,14 @@
         "dscpPolicy.o",
         "netd.o",
         "offload.o",
-        "offload@mainline.o",
         "test.o",
-        "test@mainline.o",
     ],
     apps: [
         "ServiceConnectivityResources",
     ],
     prebuilts: [
         "current_sdkinfo",
+        "netbpfload.31rc",
         "netbpfload.33rc",
         "netbpfload.35rc",
         "ot-daemon.34rc",
diff --git a/Tethering/common/TetheringLib/src/android/net/TetheringManager.java b/Tethering/common/TetheringLib/src/android/net/TetheringManager.java
index f123dca..0ac97f0 100644
--- a/Tethering/common/TetheringLib/src/android/net/TetheringManager.java
+++ b/Tethering/common/TetheringLib/src/android/net/TetheringManager.java
@@ -333,6 +333,11 @@
     public static final int TETHER_ERROR_UNKNOWN_REQUEST = 17;
     @FlaggedApi(Flags.FLAG_TETHERING_WITH_SOFT_AP_CONFIG)
     public static final int TETHER_ERROR_DUPLICATE_REQUEST = 18;
+    /**
+     * Never used outside Tethering.java.
+     * @hide
+     */
+    public static final int TETHER_ERROR_BLUETOOTH_SERVICE_PENDING = 19;
 
     /** @hide */
     @Retention(RetentionPolicy.SOURCE)
diff --git a/Tethering/src/android/net/ip/IpServer.java b/Tethering/src/android/net/ip/IpServer.java
index 609d759..d0ba431 100644
--- a/Tethering/src/android/net/ip/IpServer.java
+++ b/Tethering/src/android/net/ip/IpServer.java
@@ -852,16 +852,13 @@
         }
     }
 
-    private void removeRoutesFromNetworkAndLinkProperties(int netId,
-            @NonNull final List<RouteInfo> toBeRemoved) {
+    private void removeRoutesFromNetwork(int netId, @NonNull final List<RouteInfo> toBeRemoved) {
         final int removalFailures = NetdUtils.removeRoutesFromNetwork(
                 mNetd, netId, toBeRemoved);
         if (removalFailures > 0) {
             mLog.e("Failed to remove " + removalFailures
                     + " IPv6 routes from network " + netId + ".");
         }
-
-        for (RouteInfo route : toBeRemoved) mLinkProperties.removeRoute(route);
     }
 
     private void addInterfaceToNetwork(final int netId, @NonNull final String ifaceName) {
@@ -888,7 +885,7 @@
         }
     }
 
-    private void addRoutesToNetworkAndLinkProperties(int netId,
+    private void addRoutesToNetwork(int netId,
             @NonNull final List<RouteInfo> toBeAdded) {
         // It's safe to call addInterfaceToNetwork() even if
         // the interface is already in the network.
@@ -901,16 +898,16 @@
             mLog.e("Failed to add IPv4/v6 routes to local table: " + e);
             return;
         }
-
-        for (RouteInfo route : toBeAdded) mLinkProperties.addRoute(route);
     }
 
     private void configureLocalIPv6Routes(
             ArraySet<IpPrefix> deprecatedPrefixes, ArraySet<IpPrefix> newPrefixes) {
         // [1] Remove the routes that are deprecated.
         if (!deprecatedPrefixes.isEmpty()) {
-            removeRoutesFromNetworkAndLinkProperties(LOCAL_NET_ID,
-                    getLocalRoutesFor(mIfaceName, deprecatedPrefixes));
+            final List<RouteInfo> routesToBeRemoved =
+                    getLocalRoutesFor(mIfaceName, deprecatedPrefixes);
+            removeRoutesFromNetwork(LOCAL_NET_ID, routesToBeRemoved);
+            for (RouteInfo route : routesToBeRemoved) mLinkProperties.removeRoute(route);
         }
 
         // [2] Add only the routes that have not previously been added.
@@ -921,8 +918,10 @@
             }
 
             if (!addedPrefixes.isEmpty()) {
-                addRoutesToNetworkAndLinkProperties(LOCAL_NET_ID,
-                        getLocalRoutesFor(mIfaceName, addedPrefixes));
+                final List<RouteInfo> routesToBeAdded =
+                        getLocalRoutesFor(mIfaceName, addedPrefixes);
+                addRoutesToNetwork(LOCAL_NET_ID, routesToBeAdded);
+                for (RouteInfo route : routesToBeAdded) mLinkProperties.addRoute(route);
             }
         }
     }
@@ -1126,8 +1125,17 @@
             }
 
             try {
-                NetdUtils.tetherInterface(mNetd, LOCAL_NET_ID, mIfaceName,
-                        asIpPrefix(mIpv4Address));
+                // Enable IPv6, disable accepting RA, etc. See TetherController::tetherInterface()
+                // for more detail.
+                mNetd.tetherInterfaceAdd(mIfaceName);
+                NetdUtils.networkAddInterface(mNetd, LOCAL_NET_ID, mIfaceName,
+                        20 /* maxAttempts */, 50 /* pollingIntervalMs */);
+                // Activate a route to dest and IPv6 link local.
+                NetdUtils.modifyRoute(mNetd, NetdUtils.ModifyOperation.ADD, LOCAL_NET_ID,
+                        new RouteInfo(asIpPrefix(mIpv4Address), null, mIfaceName, RTN_UNICAST));
+                NetdUtils.modifyRoute(mNetd, NetdUtils.ModifyOperation.ADD, LOCAL_NET_ID,
+                        new RouteInfo(new IpPrefix("fe80::/64"), null, mIfaceName,
+                                RTN_UNICAST));
             } catch (RemoteException | ServiceSpecificException | IllegalStateException e) {
                 mLog.e("Error Tethering", e);
                 mLastError = TETHER_ERROR_TETHER_IFACE_ERROR;
@@ -1148,8 +1156,13 @@
             // all in sequence.
             stopIPv6();
 
+            // Reset interface for tethering.
             try {
-                NetdUtils.untetherInterface(mNetd, LOCAL_NET_ID, mIfaceName);
+                try {
+                    mNetd.tetherInterfaceRemove(mIfaceName);
+                } finally {
+                    mNetd.networkRemoveInterface(LOCAL_NET_ID, mIfaceName);
+                }
             } catch (RemoteException | ServiceSpecificException e) {
                 mLastError = TETHER_ERROR_UNTETHER_IFACE_ERROR;
                 mLog.e("Failed to untether interface: " + e);
@@ -1227,13 +1240,16 @@
             }
 
             // Remove deprecated routes from downstream network.
-            removeRoutesFromNetworkAndLinkProperties(LOCAL_NET_ID,
-                    List.of(getDirectConnectedRoute(deprecatedLinkAddress)));
+            final List<RouteInfo> routesToBeRemoved =
+                    List.of(getDirectConnectedRoute(deprecatedLinkAddress));
+            removeRoutesFromNetwork(LOCAL_NET_ID, routesToBeRemoved);
+            for (RouteInfo route : routesToBeRemoved) mLinkProperties.removeRoute(route);
             mLinkProperties.removeLinkAddress(deprecatedLinkAddress);
 
             // Add new routes to downstream network.
-            addRoutesToNetworkAndLinkProperties(LOCAL_NET_ID,
-                    List.of(getDirectConnectedRoute(mIpv4Address)));
+            final List<RouteInfo> routesToBeAdded = List.of(getDirectConnectedRoute(mIpv4Address));
+            addRoutesToNetwork(LOCAL_NET_ID, routesToBeAdded);
+            for (RouteInfo route : routesToBeAdded) mLinkProperties.addRoute(route);
             mLinkProperties.addLinkAddress(mIpv4Address);
 
             // Update local DNS caching server with new IPv4 address, otherwise, dnsmasq doesn't
diff --git a/Tethering/src/com/android/networkstack/tethering/RequestTracker.java b/Tethering/src/com/android/networkstack/tethering/RequestTracker.java
new file mode 100644
index 0000000..3ebe4f7
--- /dev/null
+++ b/Tethering/src/com/android/networkstack/tethering/RequestTracker.java
@@ -0,0 +1,164 @@
+/*
+ * Copyright (C) 2025 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.networkstack.tethering;
+
+import static com.android.networkstack.tethering.util.TetheringUtils.createPlaceholderRequest;
+
+import android.net.TetheringManager.TetheringRequest;
+import android.util.Log;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
+import com.android.internal.annotations.VisibleForTesting;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Helper class to keep track of tethering requests.
+ * The intended usage of this class is
+ * 1) Add a pending request with {@link #addPendingRequest(TetheringRequest)} before asking the link
+ *    layer to start.
+ * 2) When the link layer is up, use {@link #getOrCreatePendingRequest(int)} to get a request to
+ *    start IP serving with.
+ * 3) Remove all pending requests with {@link #removeAllPendingRequests(int)}.
+ * Note: This class is not thread-safe.
+ * TODO: Add the pending IIntResultListeners at the same time as the pending requests, and
+ *       call them when we get the tether result.
+ * TODO: Add support for multiple Bluetooth requests before the PAN service connects instead of
+ *       using a separate mPendingPanRequestListeners.
+ * TODO: Add support for fuzzy-matched requests.
+ */
+public class RequestTracker {
+    private static final String TAG = RequestTracker.class.getSimpleName();
+
+    private class PendingRequest {
+        @NonNull
+        private final TetheringRequest mTetheringRequest;
+
+        private PendingRequest(@NonNull TetheringRequest tetheringRequest) {
+            mTetheringRequest = tetheringRequest;
+        }
+
+        @NonNull
+        TetheringRequest getTetheringRequest() {
+            return mTetheringRequest;
+        }
+    }
+
+    public enum AddResult {
+        /**
+         * Request was successfully added
+         */
+        SUCCESS,
+        /**
+         * Failure indicating that the request could not be added due to a request of the same type
+         * with conflicting parameters already pending. If so, we must stop tethering for the
+         * pending request before trying to add the result again.
+         */
+        FAILURE_CONFLICTING_PENDING_REQUEST
+    }
+
+    /**
+     * List of pending requests added by {@link #addPendingRequest(TetheringRequest)}. There can be
+     * only one per type, since we remove every request of the same type when we add a request.
+     */
+    private final List<PendingRequest> mPendingRequests = new ArrayList<>();
+
+    @VisibleForTesting
+    List<TetheringRequest> getPendingTetheringRequests() {
+        List<TetheringRequest> requests = new ArrayList<>();
+        for (PendingRequest pendingRequest : mPendingRequests) {
+            requests.add(pendingRequest.getTetheringRequest());
+        }
+        return requests;
+    }
+
+    /**
+     * Add a pending request and listener. The request should be added before asking the link layer
+     * to start, and should be retrieved with {@link #getNextPendingRequest(int)} once the link
+     * layer comes up. The result of the add operation will be returned as an AddResult code.
+     */
+    public AddResult addPendingRequest(@NonNull final TetheringRequest newRequest) {
+        // Check the existing requests to see if it is OK to add the new request.
+        for (PendingRequest request : mPendingRequests) {
+            TetheringRequest existingRequest = request.getTetheringRequest();
+            if (existingRequest.getTetheringType() != newRequest.getTetheringType()) {
+                continue;
+            }
+
+            // Can't add request if there's a request of the same type with different
+            // parameters.
+            if (!existingRequest.equalsIgnoreUidPackage(newRequest)) {
+                return AddResult.FAILURE_CONFLICTING_PENDING_REQUEST;
+            }
+        }
+
+        // Remove the existing pending request of the same type. We already filter out for
+        // conflicting parameters above, so these would have been equivalent anyway (except for
+        // UID).
+        removeAllPendingRequests(newRequest.getTetheringType());
+        mPendingRequests.add(new PendingRequest(newRequest));
+        return AddResult.SUCCESS;
+    }
+
+    /**
+     * Gets the next pending TetheringRequest of a given type, or creates a placeholder request if
+     * there are none.
+     * Note: There are edge cases where the pending request is absent and we must temporarily
+     * synthesize a placeholder request, such as if stopTethering was called before link
+     * layer went up, or if the link layer goes up without us poking it (e.g. adb shell
+     * cmd wifi start-softap). These placeholder requests only specify the tethering type
+     * and the default connectivity scope.
+     */
+    @NonNull
+    public TetheringRequest getOrCreatePendingRequest(int type) {
+        TetheringRequest pending = getNextPendingRequest(type);
+        if (pending != null) return pending;
+
+        Log.w(TAG, "No pending TetheringRequest for type " + type + " found, creating a"
+                + " placeholder request");
+        return createPlaceholderRequest(type);
+    }
+
+    /**
+     * Same as {@link #getOrCreatePendingRequest(int)} but returns {@code null} if there's no
+     * pending request found.
+     *
+     * @param type Tethering type of the pending request
+     * @return pending request or {@code null} if there are none.
+     */
+    @Nullable
+    public TetheringRequest getNextPendingRequest(int type) {
+        for (PendingRequest pendingRequest : mPendingRequests) {
+            TetheringRequest tetheringRequest =
+                    pendingRequest.getTetheringRequest();
+            if (tetheringRequest.getTetheringType() == type) return tetheringRequest;
+        }
+        return null;
+    }
+
+    /**
+     * Removes all pending requests of the given tethering type.
+     *
+     * @param type Tethering type
+     */
+    public void removeAllPendingRequests(int type) {
+        mPendingRequests.removeIf(r -> r.getTetheringRequest().getTetheringType() == type);
+    }
+}
diff --git a/Tethering/src/com/android/networkstack/tethering/Tethering.java b/Tethering/src/com/android/networkstack/tethering/Tethering.java
index c0192dd..1589509 100644
--- a/Tethering/src/com/android/networkstack/tethering/Tethering.java
+++ b/Tethering/src/com/android/networkstack/tethering/Tethering.java
@@ -29,7 +29,6 @@
 import static android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK;
 import static android.net.TetheringManager.ACTION_TETHER_STATE_CHANGED;
 import static android.net.TetheringManager.CONNECTIVITY_SCOPE_GLOBAL;
-import static android.net.TetheringManager.CONNECTIVITY_SCOPE_LOCAL;
 import static android.net.TetheringManager.EXTRA_ACTIVE_LOCAL_ONLY;
 import static android.net.TetheringManager.EXTRA_ACTIVE_TETHER;
 import static android.net.TetheringManager.EXTRA_AVAILABLE_TETHER;
@@ -43,6 +42,7 @@
 import static android.net.TetheringManager.TETHERING_WIFI;
 import static android.net.TetheringManager.TETHERING_WIFI_P2P;
 import static android.net.TetheringManager.TETHERING_WIGIG;
+import static android.net.TetheringManager.TETHER_ERROR_BLUETOOTH_SERVICE_PENDING;
 import static android.net.TetheringManager.TETHER_ERROR_INTERNAL_ERROR;
 import static android.net.TetheringManager.TETHER_ERROR_NO_ERROR;
 import static android.net.TetheringManager.TETHER_ERROR_SERVICE_UNAVAIL;
@@ -77,6 +77,9 @@
 import static com.android.networkstack.tethering.metrics.TetheringStatsLog.CORE_NETWORKING_TERRIBLE_ERROR_OCCURRED__ERROR_TYPE__TYPE_LEGACY_TETHER_WITH_TYPE_WIFI_SUCCESS;
 import static com.android.networkstack.tethering.metrics.TetheringStatsLog.CORE_NETWORKING_TERRIBLE_ERROR_OCCURRED__ERROR_TYPE__TYPE_TETHER_WITH_PLACEHOLDER_REQUEST;
 import static com.android.networkstack.tethering.util.TetheringMessageBase.BASE_MAIN_SM;
+import static com.android.networkstack.tethering.util.TetheringUtils.createImplicitLocalOnlyTetheringRequest;
+import static com.android.networkstack.tethering.util.TetheringUtils.createLegacyGlobalScopeTetheringRequest;
+import static com.android.networkstack.tethering.util.TetheringUtils.createPlaceholderRequest;
 
 import android.app.usage.NetworkStatsManager;
 import android.bluetooth.BluetoothAdapter;
@@ -240,11 +243,7 @@
     private final SharedLog mLog = new SharedLog(TAG);
     private final RemoteCallbackList<ITetheringEventCallback> mTetheringEventCallbacks =
             new RemoteCallbackList<>();
-    // Currently active tethering requests per tethering type. Only one of each type can be
-    // requested at a time. After a tethering type is requested, the map keeps tethering parameters
-    // to be used after the interface comes up asynchronously.
-    private final SparseArray<TetheringRequest> mPendingTetheringRequests =
-            new SparseArray<>();
+    private final RequestTracker mRequestTracker;
 
     private final Context mContext;
     private final ArrayMap<String, TetherState> mTetherStates;
@@ -307,6 +306,7 @@
         mLooper = mDeps.makeTetheringLooper();
         mNotificationUpdater = mDeps.makeNotificationUpdater(mContext, mLooper);
         mTetheringMetrics = mDeps.makeTetheringMetrics(mContext);
+        mRequestTracker = new RequestTracker();
 
         // This is intended to ensrure that if something calls startTethering(bluetooth) just after
         // bluetooth is enabled. Before onServiceConnected is called, store the calls into this
@@ -703,15 +703,13 @@
             final IIntResultListener listener) {
         mHandler.post(() -> {
             final int type = request.getTetheringType();
-            final TetheringRequest unfinishedRequest = mPendingTetheringRequests.get(type);
-            // If tethering is already enabled with a different request,
-            // disable before re-enabling.
-            if (unfinishedRequest != null && !unfinishedRequest.equalsIgnoreUidPackage(request)) {
-                enableTetheringInternal(type, false /* disabled */,
-                        unfinishedRequest.getInterfaceName(), null);
-                mEntitlementMgr.stopProvisioningIfNeeded(type);
+            RequestTracker.AddResult result = mRequestTracker.addPendingRequest(request);
+            // If tethering is already pending with a conflicting request, stop tethering before
+            // starting.
+            if (result == RequestTracker.AddResult.FAILURE_CONFLICTING_PENDING_REQUEST) {
+                stopTetheringInternal(type); // Also removes the request from the tracker.
+                mRequestTracker.addPendingRequest(request);
             }
-            mPendingTetheringRequests.put(type, request);
 
             if (request.isExemptFromEntitlementCheck()) {
                 mEntitlementMgr.setExemptedDownstreamType(type);
@@ -719,7 +717,7 @@
                 mEntitlementMgr.startProvisioningIfNeeded(type,
                         request.getShouldShowEntitlementUi());
             }
-            enableTetheringInternal(type, true /* enabled */, request.getInterfaceName(), listener);
+            enableTetheringInternal(true /* enabled */, request, listener);
             mTetheringMetrics.createBuilder(type, callerPkg);
         });
     }
@@ -731,9 +729,7 @@
     }
 
     private boolean isTetheringTypePendingOrServing(final int type) {
-        for (int i = 0; i < mPendingTetheringRequests.size(); i++) {
-            if (mPendingTetheringRequests.valueAt(i).getTetheringType() == type) return true;
-        }
+        if (mRequestTracker.getNextPendingRequest(type) != null) return true;
         for (TetherState state : mTetherStates.values()) {
             // TODO: isCurrentlyServing only starts returning true once the IpServer has processed
             // the CMD_TETHER_REQUESTED. Ensure that we consider the request to be serving even when
@@ -764,9 +760,12 @@
     }
 
     void stopTetheringInternal(int type) {
-        mPendingTetheringRequests.remove(type);
+        mRequestTracker.removeAllPendingRequests(type);
 
-        enableTetheringInternal(type, false /* disabled */, null, null);
+        // Using a placeholder here is ok since none of the disable APIs use the request for
+        // anything. We simply need the tethering type to know which link layer to poke for removal.
+        // TODO: Remove the placeholder here and loop through each pending/serving request.
+        enableTetheringInternal(false /* disabled */, createPlaceholderRequest(type), null);
         mEntitlementMgr.stopProvisioningIfNeeded(type);
     }
 
@@ -774,9 +773,10 @@
      * Enables or disables tethering for the given type. If provisioning is required, it will
      * schedule provisioning rechecks for the specified interface.
      */
-    private void enableTetheringInternal(int type, boolean enable,
-            String iface, final IIntResultListener listener) {
-        int result = TETHER_ERROR_NO_ERROR;
+    private void enableTetheringInternal(boolean enable, @NonNull final TetheringRequest request,
+            final IIntResultListener listener) {
+        final int type = request.getTetheringType();
+        final int result;
         switch (type) {
             case TETHERING_WIFI:
                 result = setWifiTethering(enable);
@@ -785,7 +785,7 @@
                 result = setUsbTethering(enable);
                 break;
             case TETHERING_BLUETOOTH:
-                setBluetoothTethering(enable, listener);
+                result = setBluetoothTethering(enable, listener);
                 break;
             case TETHERING_NCM:
                 result = setNcmTethering(enable);
@@ -794,17 +794,17 @@
                 result = setEthernetTethering(enable);
                 break;
             case TETHERING_VIRTUAL:
-                result = setVirtualMachineTethering(enable, iface);
+                result = setVirtualMachineTethering(enable, request);
                 break;
             default:
                 Log.w(TAG, "Invalid tether type.");
                 result = TETHER_ERROR_UNKNOWN_TYPE;
         }
 
-        // The result of Bluetooth tethering will be sent by #setBluetoothTethering.
-        if (type != TETHERING_BLUETOOTH) {
-            sendTetherResult(listener, result, type);
-        }
+        // The result of Bluetooth tethering will be sent after the pan service connects.
+        if (result == TETHER_ERROR_BLUETOOTH_SERVICE_PENDING) return;
+
+        sendTetherResult(listener, result, type);
     }
 
     private void sendTetherResult(final IIntResultListener listener, final int result,
@@ -818,7 +818,7 @@
         // If changing tethering fail, remove corresponding request
         // no matter who trigger the start/stop.
         if (result != TETHER_ERROR_NO_ERROR) {
-            mPendingTetheringRequests.remove(type);
+            mRequestTracker.removeAllPendingRequests(type);
             mTetheringMetrics.updateErrorCode(type, result);
             mTetheringMetrics.sendReport(type);
         }
@@ -843,13 +843,12 @@
         return TETHER_ERROR_INTERNAL_ERROR;
     }
 
-    private void setBluetoothTethering(final boolean enable, final IIntResultListener listener) {
+    private int setBluetoothTethering(final boolean enable, final IIntResultListener listener) {
         final BluetoothAdapter adapter = mDeps.getBluetoothAdapter();
         if (adapter == null || !adapter.isEnabled()) {
             Log.w(TAG, "Tried to enable bluetooth tethering with null or disabled adapter. null: "
                     + (adapter == null));
-            sendTetherResult(listener, TETHER_ERROR_SERVICE_UNAVAIL, TETHERING_BLUETOOTH);
-            return;
+            return TETHER_ERROR_SERVICE_UNAVAIL;
         }
 
         if (mBluetoothPanListener != null && mBluetoothPanListener.isConnected()) {
@@ -857,8 +856,7 @@
             // When bluetooth tethering is enabled, any time a PAN client pairs with this
             // host, bluetooth will bring up a bt-pan interface and notify tethering to
             // enable IP serving.
-            setBluetoothTetheringSettings(mBluetoothPan, enable, listener);
-            return;
+            return setBluetoothTetheringSettings(mBluetoothPan, enable);
         }
 
         if (!enable) {
@@ -870,8 +868,7 @@
                         TETHERING_BLUETOOTH);
             }
             mPendingPanRequestListeners.clear();
-            sendTetherResult(listener, TETHER_ERROR_NO_ERROR, TETHERING_BLUETOOTH);
-            return;
+            return TETHER_ERROR_NO_ERROR;
         }
         mPendingPanRequestListeners.add(listener);
 
@@ -883,6 +880,7 @@
             mBluetoothPanListener = new PanServiceListener();
             adapter.getProfileProxy(mContext, mBluetoothPanListener, BluetoothProfile.PAN);
         }
+        return TETHER_ERROR_BLUETOOTH_SERVICE_PENDING;
     }
 
     private class PanServiceListener implements ServiceListener {
@@ -900,8 +898,9 @@
                 mIsConnected = true;
 
                 for (IIntResultListener pendingListener : mPendingPanRequestListeners) {
-                    setBluetoothTetheringSettings(mBluetoothPan, true /* enable */,
-                            pendingListener);
+                    final int result = setBluetoothTetheringSettings(mBluetoothPan,
+                            true /* enable */);
+                    sendTetherResult(pendingListener, result, TETHERING_BLUETOOTH);
                 }
                 mPendingPanRequestListeners.clear();
             });
@@ -930,8 +929,8 @@
         }
     }
 
-    private void setBluetoothTetheringSettings(@NonNull final BluetoothPan bluetoothPan,
-            final boolean enable, final IIntResultListener listener) {
+    private int setBluetoothTetheringSettings(@NonNull final BluetoothPan bluetoothPan,
+            final boolean enable) {
         if (SdkLevel.isAtLeastT()) {
             changeBluetoothTetheringSettings(bluetoothPan, enable);
         } else {
@@ -940,9 +939,8 @@
 
         // Enabling bluetooth tethering settings can silently fail. Send internal error if the
         // result is not expected.
-        final int result = bluetoothPan.isTetheringOn() == enable
+        return bluetoothPan.isTetheringOn() == enable
                 ? TETHER_ERROR_NO_ERROR : TETHER_ERROR_INTERNAL_ERROR;
-        sendTetherResult(listener, result, TETHERING_BLUETOOTH);
     }
 
     private void changeBluetoothTetheringSettingsPreT(@NonNull final BluetoothPan bluetoothPan,
@@ -989,7 +987,7 @@
             if (this != mBluetoothCallback) return;
 
             final TetheringRequest request =
-                    getOrCreatePendingTetheringRequest(TETHERING_BLUETOOTH);
+                    mRequestTracker.getOrCreatePendingRequest(TETHERING_BLUETOOTH);
             enableIpServing(request, iface);
             mConfiguredBluetoothIface = iface;
         }
@@ -1046,7 +1044,8 @@
                 return;
             }
 
-            final TetheringRequest request = getOrCreatePendingTetheringRequest(TETHERING_ETHERNET);
+            final TetheringRequest request = mRequestTracker.getOrCreatePendingRequest(
+                    TETHERING_ETHERNET);
             enableIpServing(request, iface);
             mConfiguredEthernetIface = iface;
         }
@@ -1061,14 +1060,15 @@
         }
     }
 
-    private int setVirtualMachineTethering(final boolean enable, String iface) {
+    private int setVirtualMachineTethering(final boolean enable,
+            @NonNull final TetheringRequest request) {
+        final String iface = request.getInterfaceName();
         if (enable) {
             if (TextUtils.isEmpty(iface)) {
                 mConfiguredVirtualIface = "avf_tap_fixed";
             } else {
                 mConfiguredVirtualIface = iface;
             }
-            final TetheringRequest request = getOrCreatePendingTetheringRequest(TETHERING_VIRTUAL);
             enableIpServing(request, mConfiguredVirtualIface);
         } else if (mConfiguredVirtualIface != null) {
             ensureIpServerStopped(mConfiguredVirtualIface);
@@ -1077,50 +1077,6 @@
         return TETHER_ERROR_NO_ERROR;
     }
 
-    /**
-     * Create a legacy tethering request for calls to the legacy tether() API, which doesn't take an
-     * explicit request. These are always CONNECTIVITY_SCOPE_GLOBAL, per historical behavior.
-     */
-    private TetheringRequest createLegacyGlobalScopeTetheringRequest(int type) {
-        final TetheringRequest request = new TetheringRequest.Builder(type).build();
-        request.getParcel().requestType = TetheringRequest.REQUEST_TYPE_LEGACY;
-        request.getParcel().connectivityScope = CONNECTIVITY_SCOPE_GLOBAL;
-        return request;
-    }
-
-    /**
-     * Create a local-only implicit tethering request. This is used for Wifi local-only hotspot and
-     * Wifi P2P, which start tethering based on the WIFI_(AP/P2P)_STATE_CHANGED broadcasts.
-     */
-    @NonNull
-    private TetheringRequest createImplicitLocalOnlyTetheringRequest(int type) {
-        final TetheringRequest request = new TetheringRequest.Builder(type).build();
-        request.getParcel().requestType = TetheringRequest.REQUEST_TYPE_IMPLICIT;
-        request.getParcel().connectivityScope = CONNECTIVITY_SCOPE_LOCAL;
-        return request;
-    }
-
-    /**
-     * Gets the TetheringRequest that #startTethering was called with but is waiting for the link
-     * layer event to indicate the interface is available to tether.
-     * Note: There are edge cases where the pending request is absent and we must temporarily
-     *       synthesize a placeholder request, such as if stopTethering was called before link layer
-     *       went up, or if the link layer goes up without us poking it (e.g. adb shell cmd wifi
-     *       start-softap). These placeholder requests only specify the tethering type and the
-     *       default connectivity scope.
-     */
-    @NonNull
-    private TetheringRequest getOrCreatePendingTetheringRequest(int type) {
-        TetheringRequest pending = mPendingTetheringRequests.get(type);
-        if (pending != null) return pending;
-
-        Log.w(TAG, "No pending TetheringRequest for type " + type + " found, creating a placeholder"
-                + " request");
-        TetheringRequest placeholder = new TetheringRequest.Builder(type).build();
-        placeholder.getParcel().requestType = REQUEST_TYPE_PLACEHOLDER;
-        return placeholder;
-    }
-
     private void handleLegacyTether(String iface, final IIntResultListener listener) {
         if (Build.VERSION.SDK_INT > Build.VERSION_CODES.VANILLA_ICE_CREAM) {
             // After V, the TetheringManager and ConnectivityManager tether and untether methods
@@ -1138,7 +1094,10 @@
             } catch (RemoteException e) { }
         }
 
-        final TetheringRequest request = createLegacyGlobalScopeTetheringRequest(type);
+        TetheringRequest request = mRequestTracker.getNextPendingRequest(type);
+        if (request == null) {
+            request = createLegacyGlobalScopeTetheringRequest(type);
+        }
         int result = tetherInternal(request, iface);
         switch (type) {
             case TETHERING_WIFI:
@@ -1208,7 +1167,7 @@
         // processed, this will be a no-op and it will not return an error.
         //
         // This code cannot race with untether() because they both run on the handler thread.
-        mPendingTetheringRequests.remove(request.getTetheringType());
+        mRequestTracker.removeAllPendingRequests(request.getTetheringType());
         tetherState.ipServer.enable(request);
         if (request.getRequestType() == REQUEST_TYPE_PLACEHOLDER) {
             TerribleErrorLog.logTerribleError(TetheringStatsLog::write,
@@ -1574,8 +1533,8 @@
     }
 
     @VisibleForTesting
-    SparseArray<TetheringRequest> getPendingTetheringRequests() {
-        return mPendingTetheringRequests;
+    List<TetheringRequest> getPendingTetheringRequests() {
+        return mRequestTracker.getPendingTetheringRequests();
     }
 
     @VisibleForTesting
@@ -1635,10 +1594,6 @@
         }
     }
 
-    final TetheringRequest getPendingTetheringRequest(int type) {
-        return mPendingTetheringRequests.get(type, null);
-    }
-
     private void enableIpServing(@NonNull TetheringRequest request, String ifname) {
         enableIpServing(request, ifname, false /* isNcm */);
     }
@@ -1726,7 +1681,7 @@
         switch (wifiIpMode) {
             case IFACE_IP_MODE_TETHERED:
                 type = maybeInferWifiTetheringType(ifname);
-                request = getOrCreatePendingTetheringRequest(type);
+                request = mRequestTracker.getOrCreatePendingRequest(type);
                 // Wifi requests will always have CONNECTIVITY_SCOPE_GLOBAL, because
                 // TetheringRequest.Builder will not allow callers to set CONNECTIVITY_SCOPE_LOCAL
                 // for TETHERING_WIFI. However, if maybeInferWifiTetheringType returns a non-Wifi
@@ -1781,7 +1736,7 @@
             return;
         }
 
-        final TetheringRequest request = getOrCreatePendingTetheringRequest(tetheringType);
+        final TetheringRequest request = mRequestTracker.getOrCreatePendingRequest(tetheringType);
         if (ifaces != null) {
             for (String iface : ifaces) {
                 if (ifaceNameToType(iface) == tetheringType) {
@@ -2414,9 +2369,14 @@
                         break;
                     }
                     case EVENT_REQUEST_CHANGE_DOWNSTREAM: {
-                        final int tetheringType = message.arg1;
+                        final int type = message.arg1;
                         final Boolean enabled = (Boolean) message.obj;
-                        enableTetheringInternal(tetheringType, enabled, null, null);
+                        // Using a placeholder here is ok since we just need to the type of
+                        // tethering to poke the link layer. When the link layer comes up, we won't
+                        // have a pending request to use, but this matches the historical behavior.
+                        // TODO: Get the TetheringRequest from IpServer and make sure to put it in
+                        //       the pending list too.
+                        enableTetheringInternal(enabled, createPlaceholderRequest(type), null);
                         break;
                     }
                     default:
diff --git a/Tethering/src/com/android/networkstack/tethering/TetheringConfiguration.java b/Tethering/src/com/android/networkstack/tethering/TetheringConfiguration.java
index b3e9c1b..3c91a1b 100644
--- a/Tethering/src/com/android/networkstack/tethering/TetheringConfiguration.java
+++ b/Tethering/src/com/android/networkstack/tethering/TetheringConfiguration.java
@@ -130,9 +130,6 @@
     public static final String TETHER_ENABLE_WEAR_TETHERING =
             "tether_enable_wear_tethering";
 
-    public static final String TETHER_FORCE_RANDOM_PREFIX_BASE_SELECTION =
-            "tether_force_random_prefix_base_selection";
-
     public static final String TETHER_ENABLE_SYNC_SM = "tether_enable_sync_sm";
 
     /**
@@ -142,7 +139,7 @@
     public static final int DEFAULT_TETHER_OFFLOAD_POLL_INTERVAL_MS = 5000;
 
     /** A flag for using synchronous or asynchronous state machine. */
-    public static boolean USE_SYNC_SM = false;
+    public static boolean USE_SYNC_SM = true;
 
     /**
      * A feature flag to control whether the active sessions metrics should be enabled.
@@ -195,6 +192,10 @@
             return DeviceConfigUtils.isTetheringFeatureEnabled(context, name);
         }
 
+        boolean isFeatureNotChickenedOut(@NonNull Context context, @NonNull String name) {
+            return DeviceConfigUtils.isTetheringFeatureNotChickenedOut(context, name);
+        }
+
         boolean getDeviceConfigBoolean(@NonNull String namespace, @NonNull String name,
                 boolean defaultValue) {
             return DeviceConfig.getBoolean(namespace, name, defaultValue);
@@ -394,7 +395,7 @@
      * use the async state machine.
      */
     public void readEnableSyncSM(final Context ctx) {
-        USE_SYNC_SM = mDeps.isFeatureEnabled(ctx, TETHER_ENABLE_SYNC_SM);
+        USE_SYNC_SM = mDeps.isFeatureNotChickenedOut(ctx, TETHER_ENABLE_SYNC_SM);
     }
 
     /** Does the dumping.*/
diff --git a/Tethering/src/com/android/networkstack/tethering/util/TetheringUtils.java b/Tethering/src/com/android/networkstack/tethering/util/TetheringUtils.java
index 76c2f0d..79e6e16 100644
--- a/Tethering/src/com/android/networkstack/tethering/util/TetheringUtils.java
+++ b/Tethering/src/com/android/networkstack/tethering/util/TetheringUtils.java
@@ -15,7 +15,11 @@
  */
 package com.android.networkstack.tethering.util;
 
+import static android.net.TetheringManager.CONNECTIVITY_SCOPE_GLOBAL;
+import static android.net.TetheringManager.CONNECTIVITY_SCOPE_LOCAL;
+
 import android.net.TetherStatsParcel;
+import android.net.TetheringManager.TetheringRequest;
 import android.util.Log;
 
 import androidx.annotation.NonNull;
@@ -166,4 +170,41 @@
             return null;
         }
     }
+
+    /**
+     * Create a legacy tethering request for calls to the legacy tether() API, which doesn't take an
+     * explicit request. These are always CONNECTIVITY_SCOPE_GLOBAL, per historical behavior.
+     */
+    @NonNull
+    public static TetheringRequest createLegacyGlobalScopeTetheringRequest(int type) {
+        final TetheringRequest request = new TetheringRequest.Builder(type).build();
+        request.getParcel().requestType = TetheringRequest.REQUEST_TYPE_LEGACY;
+        request.getParcel().connectivityScope = CONNECTIVITY_SCOPE_GLOBAL;
+        return request;
+    }
+
+    /**
+     * Create a local-only implicit tethering request. This is used for Wifi local-only hotspot and
+     * Wifi P2P, which start tethering based on the WIFI_(AP/P2P)_STATE_CHANGED broadcasts.
+     */
+    @NonNull
+    public static TetheringRequest createImplicitLocalOnlyTetheringRequest(int type) {
+        final TetheringRequest request = new TetheringRequest.Builder(type).build();
+        request.getParcel().requestType = TetheringRequest.REQUEST_TYPE_IMPLICIT;
+        request.getParcel().connectivityScope = CONNECTIVITY_SCOPE_LOCAL;
+        return request;
+    }
+
+    /**
+     * Create a placeholder request. This is used in case we try to find a pending request but there
+     * is none (e.g. stopTethering removed a pending request), or for cases where we only have the
+     * tethering type (e.g. stopTethering(int)).
+     */
+    @NonNull
+    public static TetheringRequest createPlaceholderRequest(int type) {
+        final TetheringRequest request = new TetheringRequest.Builder(type).build();
+        request.getParcel().requestType = TetheringRequest.REQUEST_TYPE_PLACEHOLDER;
+        request.getParcel().connectivityScope = CONNECTIVITY_SCOPE_GLOBAL;
+        return request;
+    }
 }
diff --git a/Tethering/tests/unit/Android.bp b/Tethering/tests/unit/Android.bp
index d0d23ac..ee82776 100644
--- a/Tethering/tests/unit/Android.bp
+++ b/Tethering/tests/unit/Android.bp
@@ -57,6 +57,7 @@
         "mockito-target-extended-minus-junit4",
         "net-tests-utils",
         "testables",
+        "truth",
     ],
     // TODO(b/147200698) change sdk_version to module-current and
     // remove framework-minus-apex, ext, and framework-res
diff --git a/Tethering/tests/unit/src/com/android/networkstack/tethering/FakeTetheringConfiguration.java b/Tethering/tests/unit/src/com/android/networkstack/tethering/FakeTetheringConfiguration.java
index 087be26..c97fa3d 100644
--- a/Tethering/tests/unit/src/com/android/networkstack/tethering/FakeTetheringConfiguration.java
+++ b/Tethering/tests/unit/src/com/android/networkstack/tethering/FakeTetheringConfiguration.java
@@ -33,6 +33,11 @@
             }
 
             @Override
+            boolean isFeatureNotChickenedOut(@NonNull Context context, @NonNull String name) {
+                return true;
+            }
+
+            @Override
             boolean getDeviceConfigBoolean(@NonNull String namespace, @NonNull String name,
                     boolean defaultValue) {
                 return defaultValue;
diff --git a/Tethering/tests/unit/src/com/android/networkstack/tethering/PrivateAddressCoordinatorTest.java b/Tethering/tests/unit/src/com/android/networkstack/tethering/PrivateAddressCoordinatorTest.java
index f9e3a6a..ada88fb 100644
--- a/Tethering/tests/unit/src/com/android/networkstack/tethering/PrivateAddressCoordinatorTest.java
+++ b/Tethering/tests/unit/src/com/android/networkstack/tethering/PrivateAddressCoordinatorTest.java
@@ -26,7 +26,6 @@
 import static android.net.TetheringManager.TETHERING_WIFI_P2P;
 import static android.net.ip.IpServer.CMD_NOTIFY_PREFIX_CONFLICT;
 
-import static com.android.net.module.util.PrivateAddressCoordinator.TETHER_FORCE_RANDOM_PREFIX_BASE_SELECTION;
 import static com.android.networkstack.tethering.util.PrefixUtils.asIpPrefix;
 
 import static org.junit.Assert.assertEquals;
@@ -51,6 +50,7 @@
 import android.net.Network;
 import android.net.NetworkCapabilities;
 import android.net.ip.IpServer;
+import android.os.Build;
 import android.os.IBinder;
 
 import androidx.test.filters.SmallTest;
@@ -58,8 +58,10 @@
 
 import com.android.net.module.util.IIpv4PrefixRequest;
 import com.android.net.module.util.PrivateAddressCoordinator;
+import com.android.testutils.DevSdkIgnoreRule;
 
 import org.junit.Before;
+import org.junit.Rule;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.mockito.Mock;
@@ -71,6 +73,9 @@
 @RunWith(AndroidJUnit4.class)
 @SmallTest
 public final class PrivateAddressCoordinatorTest {
+    @Rule
+    public final DevSdkIgnoreRule mIgnoreRule = new DevSdkIgnoreRule();
+
     private static final String TEST_IFNAME = "test0";
 
     @Mock private IpServer mHotspotIpServer;
@@ -231,11 +236,9 @@
         assertEquals(usbAddress, newUsbAddress);
 
         final UpstreamNetworkState wifiUpstream = buildUpstreamNetworkState(mWifiNetwork,
-                new LinkAddress("192.168.88.23/16"), null,
-                makeNetworkCapabilities(TRANSPORT_WIFI));
+                hotspotAddress, null, makeNetworkCapabilities(TRANSPORT_WIFI));
         updateUpstreamPrefix(wifiUpstream);
         verify(mHotspotIpServer).sendMessage(IpServer.CMD_NOTIFY_PREFIX_CONFLICT);
-        verify(mUsbIpServer).sendMessage(IpServer.CMD_NOTIFY_PREFIX_CONFLICT);
     }
 
     private UpstreamNetworkState buildUpstreamNetworkState(final Network network,
@@ -323,10 +326,9 @@
         assertFalse(localHotspotPrefix.containsPrefix(hotspotPrefix));
     }
 
+    @DevSdkIgnoreRule.IgnoreUpTo(Build.VERSION_CODES.VANILLA_ICE_CREAM)
     @Test
     public void testStartedPrefixRange() throws Exception {
-        when(mDeps.isFeatureEnabled(TETHER_FORCE_RANDOM_PREFIX_BASE_SELECTION)).thenReturn(true);
-
         startedPrefixBaseTest("192.168.0.0/16", 0);
 
         startedPrefixBaseTest("192.168.0.0/16", 1);
diff --git a/Tethering/tests/unit/src/com/android/networkstack/tethering/RequestTrackerTest.java b/Tethering/tests/unit/src/com/android/networkstack/tethering/RequestTrackerTest.java
new file mode 100644
index 0000000..e00e9f0
--- /dev/null
+++ b/Tethering/tests/unit/src/com/android/networkstack/tethering/RequestTrackerTest.java
@@ -0,0 +1,139 @@
+/*
+ * Copyright (C) 2025 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.networkstack.tethering;
+
+import static android.net.TetheringManager.TETHERING_USB;
+import static android.net.TetheringManager.TETHERING_WIFI;
+
+import static com.android.networkstack.tethering.util.TetheringUtils.createPlaceholderRequest;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.net.TetheringManager.TetheringRequest;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SmallTest;
+
+import com.android.networkstack.tethering.RequestTracker.AddResult;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@RunWith(AndroidJUnit4.class)
+@SmallTest
+public class RequestTrackerTest {
+    private RequestTracker mRequestTracker;
+
+    @Before
+    public void setUp() {
+        mRequestTracker = new RequestTracker();
+    }
+
+    @Test
+    public void testNoRequestsAdded_noPendingRequests() {
+        assertThat(mRequestTracker.getNextPendingRequest(TETHERING_WIFI)).isNull();
+        assertThat(mRequestTracker.getOrCreatePendingRequest(TETHERING_WIFI))
+                .isEqualTo(createPlaceholderRequest(TETHERING_WIFI));
+    }
+
+    @Test
+    public void testAddRequest_successResultAndBecomesNextPending() {
+        final TetheringRequest request = new TetheringRequest.Builder(TETHERING_WIFI).build();
+
+        final AddResult result = mRequestTracker.addPendingRequest(request);
+
+        assertThat(result).isEqualTo(AddResult.SUCCESS);
+        assertThat(mRequestTracker.getNextPendingRequest(TETHERING_WIFI)).isEqualTo(request);
+        assertThat(mRequestTracker.getOrCreatePendingRequest(TETHERING_WIFI)).isEqualTo(request);
+    }
+
+    @Test
+    public void testAddRequest_equalRequestExists_successResultAndBecomesNextPending() {
+        final TetheringRequest request = new TetheringRequest.Builder(TETHERING_WIFI).build();
+        mRequestTracker.addPendingRequest(request);
+
+        final TetheringRequest equalRequest = new TetheringRequest.Builder(TETHERING_WIFI).build();
+        final AddResult result = mRequestTracker.addPendingRequest(equalRequest);
+
+        assertThat(result).isEqualTo(AddResult.SUCCESS);
+        assertThat(mRequestTracker.getNextPendingRequest(TETHERING_WIFI)).isEqualTo(request);
+        assertThat(mRequestTracker.getOrCreatePendingRequest(TETHERING_WIFI)).isEqualTo(request);
+    }
+
+    @Test
+    public void testAddRequest_equalButDifferentUidRequest_successResultAndBecomesNextPending() {
+        final TetheringRequest request = new TetheringRequest.Builder(TETHERING_WIFI).build();
+        request.setUid(1000);
+        request.setPackageName("package");
+        final TetheringRequest differentUid = new TetheringRequest.Builder(TETHERING_WIFI).build();
+        differentUid.setUid(2000);
+        differentUid.setPackageName("package2");
+        mRequestTracker.addPendingRequest(request);
+
+        final AddResult result = mRequestTracker.addPendingRequest(differentUid);
+
+        assertThat(result).isEqualTo(AddResult.SUCCESS);
+        assertThat(mRequestTracker.getNextPendingRequest(TETHERING_WIFI)).isEqualTo(differentUid);
+        assertThat(mRequestTracker.getOrCreatePendingRequest(TETHERING_WIFI))
+                .isEqualTo(differentUid);
+    }
+
+    @Test
+    public void testAddConflictingRequest_returnsFailureConflictingPendingRequest() {
+        final TetheringRequest request = new TetheringRequest.Builder(TETHERING_WIFI).build();
+        final TetheringRequest conflictingRequest = new TetheringRequest.Builder(TETHERING_WIFI)
+                .setExemptFromEntitlementCheck(true).build();
+        mRequestTracker.addPendingRequest(request);
+
+        final AddResult result = mRequestTracker.addPendingRequest(conflictingRequest);
+
+        assertThat(result).isEqualTo(AddResult.FAILURE_CONFLICTING_PENDING_REQUEST);
+        assertThat(mRequestTracker.getNextPendingRequest(TETHERING_WIFI)).isEqualTo(request);
+        assertThat(mRequestTracker.getOrCreatePendingRequest(TETHERING_WIFI)).isEqualTo(request);
+    }
+
+    @Test
+    public void testRemoveAllPendingRequests_noPendingRequestsLeft() {
+        final TetheringRequest firstRequest = new TetheringRequest.Builder(TETHERING_WIFI).build();
+        firstRequest.setUid(1000);
+        firstRequest.setPackageName("package");
+        mRequestTracker.addPendingRequest(firstRequest);
+        final TetheringRequest secondRequest = new TetheringRequest.Builder(TETHERING_WIFI).build();
+        secondRequest.setUid(2000);
+        secondRequest.setPackageName("package2");
+        mRequestTracker.addPendingRequest(secondRequest);
+
+        mRequestTracker.removeAllPendingRequests(TETHERING_WIFI);
+
+        assertThat(mRequestTracker.getNextPendingRequest(TETHERING_WIFI)).isNull();
+        assertThat(mRequestTracker.getOrCreatePendingRequest(TETHERING_WIFI))
+                .isEqualTo(createPlaceholderRequest(TETHERING_WIFI));
+    }
+
+    @Test
+    public void testRemoveAllPendingRequests_differentTypeExists_doesNotRemoveDifferentType() {
+        final TetheringRequest differentType = new TetheringRequest.Builder(TETHERING_USB).build();
+        mRequestTracker.addPendingRequest(differentType);
+
+        mRequestTracker.removeAllPendingRequests(TETHERING_WIFI);
+
+        assertThat(mRequestTracker.getNextPendingRequest(TETHERING_USB)).isEqualTo(differentType);
+        assertThat(mRequestTracker.getOrCreatePendingRequest(TETHERING_USB))
+                .isEqualTo(differentType);
+    }
+}
diff --git a/Tethering/tests/unit/src/com/android/networkstack/tethering/TetheringConfigurationTest.java b/Tethering/tests/unit/src/com/android/networkstack/tethering/TetheringConfigurationTest.java
index dd51c7a..0159573 100644
--- a/Tethering/tests/unit/src/com/android/networkstack/tethering/TetheringConfigurationTest.java
+++ b/Tethering/tests/unit/src/com/android/networkstack/tethering/TetheringConfigurationTest.java
@@ -160,6 +160,11 @@
         }
 
         @Override
+        boolean isFeatureNotChickenedOut(@NonNull Context context, @NonNull String name) {
+            return isMockFlagEnabled(name, true /* defaultEnabled */);
+        }
+
+        @Override
         boolean getDeviceConfigBoolean(@NonNull String namespace, @NonNull String name,
                 boolean defaultValue) {
             // Flags should use isFeatureEnabled instead of getBoolean; see comments in
@@ -767,9 +772,9 @@
 
     @Test
     public void testEnableSyncSMFlag() throws Exception {
-        // Test default disabled
+        // Test default enabled
         setTetherEnableSyncSMFlagEnabled(null);
-        assertEnableSyncSM(false);
+        assertEnableSyncSM(true);
 
         setTetherEnableSyncSMFlagEnabled(true);
         assertEnableSyncSM(true);
diff --git a/Tethering/tests/unit/src/com/android/networkstack/tethering/TetheringTest.java b/Tethering/tests/unit/src/com/android/networkstack/tethering/TetheringTest.java
index e1c2db9..51efaf8 100644
--- a/Tethering/tests/unit/src/com/android/networkstack/tethering/TetheringTest.java
+++ b/Tethering/tests/unit/src/com/android/networkstack/tethering/TetheringTest.java
@@ -964,7 +964,7 @@
         mLooper.dispatchAll();
 
         assertEquals(1, mTethering.getPendingTetheringRequests().size());
-        assertEquals(request, mTethering.getPendingTetheringRequests().get(TETHERING_USB));
+        assertTrue(mTethering.getPendingTetheringRequests().get(0).equals(request));
 
         if (mTethering.getTetheringConfiguration().isUsingNcm()) {
             verify(mUsbManager).setCurrentFunctions(UsbManager.FUNCTION_NCM);
@@ -2879,6 +2879,44 @@
     }
 
     @Test
+    @IgnoreAfter(Build.VERSION_CODES.VANILLA_ICE_CREAM)
+    public void testRequestStaticIpLegacyTether() throws Exception {
+        initTetheringOnTestThread();
+
+        // Call startTethering with static ip
+        final LinkAddress serverLinkAddr = new LinkAddress("192.168.0.123/24");
+        final LinkAddress clientLinkAddr = new LinkAddress("192.168.0.42/24");
+        final String serverAddr = "192.168.0.123";
+        final int clientAddrParceled = 0xc0a8002a;
+        final ArgumentCaptor<DhcpServingParamsParcel> dhcpParamsCaptor =
+                ArgumentCaptor.forClass(DhcpServingParamsParcel.class);
+        when(mWifiManager.startTetheredHotspot(any())).thenReturn(true);
+        mTethering.startTethering(createTetheringRequest(TETHERING_WIFI,
+                        serverLinkAddr, clientLinkAddr, false, CONNECTIVITY_SCOPE_GLOBAL, null),
+                TEST_CALLER_PKG, null);
+        mLooper.dispatchAll();
+        verify(mWifiManager, times(1)).startTetheredHotspot(any());
+        mTethering.interfaceStatusChanged(TEST_WLAN_IFNAME, true);
+
+        // Call legacyTether on the interface before the link layer event comes back.
+        // This happens, for example, in pre-T bluetooth tethering: Settings calls startTethering,
+        // and then the bluetooth code calls the tether() API.
+        final ResultListener tetherResult = new ResultListener(TETHER_ERROR_NO_ERROR);
+        mTethering.legacyTether(TEST_WLAN_IFNAME, tetherResult);
+        mLooper.dispatchAll();
+        tetherResult.assertHasResult();
+
+        // Verify that the static ip set in startTethering is used
+        verify(mNetd).interfaceSetCfg(argThat(cfg -> serverAddr.equals(cfg.ipv4Addr)));
+        verify(mIpServerDependencies, times(1)).makeDhcpServer(any(), dhcpParamsCaptor.capture(),
+                any());
+        final DhcpServingParamsParcel params = dhcpParamsCaptor.getValue();
+        assertEquals(serverAddr, intToInet4AddressHTH(params.serverAddr).getHostAddress());
+        assertEquals(24, params.serverAddrPrefixLength);
+        assertEquals(clientAddrParceled, params.singleClientAddr);
+    }
+
+    @Test
     public void testUpstreamNetworkChanged() throws Exception {
         initTetheringOnTestThread();
         final InOrder inOrder = inOrder(mNotificationUpdater);
diff --git a/bpf/dns_helper/DnsBpfHelper.cpp b/bpf/dns_helper/DnsBpfHelper.cpp
index 0719ade..cf2fa2b 100644
--- a/bpf/dns_helper/DnsBpfHelper.cpp
+++ b/bpf/dns_helper/DnsBpfHelper.cpp
@@ -32,12 +32,44 @@
     }                                                                                              \
   } while (0)
 
+// copied from BpfHandler.cpp
+static bool mainlineNetBpfLoadDone() {
+  return !access("/sys/fs/bpf/netd_shared/mainline_done", F_OK);
+}
+
+// copied from BpfHandler.cpp
+static inline void waitForNetProgsLoaded() {
+  // infinite loop until success with 5/10/20/40/60/60/60... delay
+  for (int delay = 5;; delay *= 2) {
+    if (delay > 60) delay = 60;
+    if (base::WaitForProperty("init.svc.mdnsd_netbpfload", "stopped", std::chrono::seconds(delay))
+      && mainlineNetBpfLoadDone()) return;
+    LOG(WARNING) << "Waited " << delay << "s for init.svc.mdnsd_netbpfload=stopped, still waiting.";
+  }
+}
+
 base::Result<void> DnsBpfHelper::init() {
-  if (!android::modules::sdklevel::IsAtLeastT()) {
-    LOG(ERROR) << __func__ << ": Unsupported before Android T.";
+  if (!android::modules::sdklevel::IsAtLeastS()) {
+    LOG(ERROR) << __func__ << ": Unsupported before Android S.";
     return base::Error(EOPNOTSUPP);
   }
 
+  if (!android::modules::sdklevel::IsAtLeastT()) {
+    LOG(INFO) << "performing Android S mainline NetBpfload magic!";
+    if (!mainlineNetBpfLoadDone()) {
+      // We're on S/Sv2 & it's the first time netd is starting up (unless crashlooping)
+      if (!base::SetProperty("ctl.start", "mdnsd_netbpfload")) {
+        LOG(ERROR) << "Failed to set property ctl.start=mdnsd_netbpfload, see dmesg for reason.";
+        return base::Error(ENOEXEC);
+      }
+
+      LOG(INFO) << "Waiting for Networking BPF programs";
+      waitForNetProgsLoaded();
+      LOG(INFO) << "Networking BPF programs are loaded";
+    }
+    return {};
+  }
+
   RETURN_IF_RESULT_NOT_OK(mConfigurationMap.init(CONFIGURATION_MAP_PATH));
   RETURN_IF_RESULT_NOT_OK(mUidOwnerMap.init(UID_OWNER_MAP_PATH));
   RETURN_IF_RESULT_NOT_OK(mDataSaverEnabledMap.init(DATA_SAVER_ENABLED_MAP_PATH));
diff --git a/bpf/headers/include/bpf/BpfUtils.h b/bpf/headers/include/bpf/BpfUtils.h
index 9e8b2c7..ed08e1a 100644
--- a/bpf/headers/include/bpf/BpfUtils.h
+++ b/bpf/headers/include/bpf/BpfUtils.h
@@ -26,6 +26,7 @@
 #include <sys/socket.h>
 #include <sys/utsname.h>
 
+#include <android-base/properties.h>
 #include <log/log.h>
 
 #include "KernelUtils.h"
@@ -33,6 +34,16 @@
 namespace android {
 namespace bpf {
 
+const bool unreleased = (base::GetProperty("ro.build.version.codename", "REL") != "REL");
+const int api_level = unreleased ? 10000 : android_get_device_api_level();
+const bool isAtLeastR = (api_level >= 30);
+const bool isAtLeastS = (api_level >= 31);
+// Sv2 is 32
+const bool isAtLeastT = (api_level >= 33);
+const bool isAtLeastU = (api_level >= 34);
+const bool isAtLeastV = (api_level >= 35);
+const bool isAtLeast25Q2 = (api_level >= 36);
+
 // See kernel's net/core/sock_diag.c __sock_gen_cookie()
 // the implementation of which guarantees 0 will never be returned,
 // primarily because 0 is used to mean not yet initialized,
diff --git a/bpf/headers/include/bpf/KernelUtils.h b/bpf/headers/include/bpf/KernelUtils.h
index 68bc607..a36085a 100644
--- a/bpf/headers/include/bpf/KernelUtils.h
+++ b/bpf/headers/include/bpf/KernelUtils.h
@@ -55,12 +55,12 @@
            isKernelVersion(4,  9) ||  // minimum for Android S & T
            isKernelVersion(4, 14) ||  // minimum for Android U
            isKernelVersion(4, 19) ||  // minimum for Android V
-           isKernelVersion(5,  4) ||  // first supported in Android R, min for W
+           isKernelVersion(5,  4) ||  // first supported in Android R, min for 25Q2
            isKernelVersion(5, 10) ||  // first supported in Android S
            isKernelVersion(5, 15) ||  // first supported in Android T
            isKernelVersion(6,  1) ||  // first supported in Android U
            isKernelVersion(6,  6) ||  // first supported in Android V
-           isKernelVersion(6, 12);    // first supported in Android W
+           isKernelVersion(6, 12);    // first supported in Android 25Q2
 }
 
 // Figure out the bitness of userspace.
diff --git a/bpf/headers/include/bpf_helpers.h b/bpf/headers/include/bpf_helpers.h
index 6a0e5a8..9d6b6f6 100644
--- a/bpf/headers/include/bpf_helpers.h
+++ b/bpf/headers/include/bpf_helpers.h
@@ -46,12 +46,12 @@
 #define BPFLOADER_U_QPR2_VERSION 41u
 #define BPFLOADER_PLATFORM_VERSION BPFLOADER_U_QPR2_VERSION
 
-// Android Mainline - this bpfloader should eventually go back to T (or even S)
+// Android Mainline BpfLoader when running on Android S (sdk=31)
 // Note: this value (and the following +1u's) are hardcoded in NetBpfLoad.cpp
-#define BPFLOADER_MAINLINE_VERSION 42u
+#define BPFLOADER_MAINLINE_S_VERSION 42u
 
 // Android Mainline BpfLoader when running on Android T (sdk=33)
-#define BPFLOADER_MAINLINE_T_VERSION (BPFLOADER_MAINLINE_VERSION + 1u)
+#define BPFLOADER_MAINLINE_T_VERSION (BPFLOADER_MAINLINE_S_VERSION + 1u)
 
 // Android Mainline BpfLoader when running on Android U (sdk=34)
 #define BPFLOADER_MAINLINE_U_VERSION (BPFLOADER_MAINLINE_T_VERSION + 1u)
@@ -112,7 +112,7 @@
     unsigned int _bpfloader_max_ver SECTION("bpfloader_max_ver") = BPFLOADER_MAX_VER;              \
     size_t _size_of_bpf_map_def SECTION("size_of_bpf_map_def") = sizeof(struct bpf_map_def);       \
     size_t _size_of_bpf_prog_def SECTION("size_of_bpf_prog_def") = sizeof(struct bpf_prog_def);    \
-    unsigned _btf_min_bpfloader_ver SECTION("btf_min_bpfloader_ver") = BPFLOADER_MAINLINE_VERSION; \
+    unsigned _btf_min_bpfloader_ver SECTION("btf_min_bpfloader_ver") = BPFLOADER_MAINLINE_S_VERSION; \
     unsigned _btf_user_min_bpfloader_ver SECTION("btf_user_min_bpfloader_ver") = 0xFFFFFFFFu;      \
     char _license[] SECTION("license") = (NAME)
 
diff --git a/bpf/headers/include/bpf_map_def.h b/bpf/headers/include/bpf_map_def.h
index e95ca5f..2e5afca 100644
--- a/bpf/headers/include/bpf_map_def.h
+++ b/bpf/headers/include/bpf_map_def.h
@@ -163,7 +163,7 @@
     enum bpf_map_type type;
     unsigned int key_size;
     unsigned int value_size;
-    int max_entries;  // negative means BPF_F_NO_PREALLOC, but *might* not work with S
+    unsigned int max_entries;
     unsigned int map_flags;
 
     // The following are not supported by the Android bpfloader:
diff --git a/bpf/loader/Android.bp b/bpf/loader/Android.bp
index b08913a..345e92b 100644
--- a/bpf/loader/Android.bp
+++ b/bpf/loader/Android.bp
@@ -42,6 +42,7 @@
     shared_libs: [
         "libbase",
         "liblog",
+        "libbpf",
     ],
     srcs: ["NetBpfLoad.cpp"],
     apex_available: [
@@ -56,11 +57,22 @@
     installable: false,
 }
 
-// Versioned netbpfload init rc: init system will process it only on api T/33+ devices
+// Versioned netbpfload init rc: init system will process it only on api R/30 S/31 Sv2/32 devices
 // Note: R[30] S[31] Sv2[32] T[33] U[34] V[35])
 //
 // For details of versioned rc files see:
 // https://android.googlesource.com/platform/system/core/+/HEAD/init/README.md#versioned-rc-files-within-apexs
+//
+// However, .Xrc versioning doesn't work on S, so we use unversioned, and thus *do* trigger on R,
+// luckily nothing ever uses the new service on R, so you can think of it as being S/Sv2 only
+prebuilt_etc {
+    name: "netbpfload.31rc",
+    src: "netbpfload.31rc",
+    filename: "netbpfload.rc", // intentional: .31rc wouldn't take effect on S
+    installable: false,
+}
+
+// Versioned netbpfload init rc: init system will process it only on api T/33+ devices
 prebuilt_etc {
     name: "netbpfload.33rc",
     src: "netbpfload.33rc",
diff --git a/bpf/loader/NetBpfLoad.cpp b/bpf/loader/NetBpfLoad.cpp
index 1e088a6..b9ef766 100644
--- a/bpf/loader/NetBpfLoad.cpp
+++ b/bpf/loader/NetBpfLoad.cpp
@@ -17,6 +17,7 @@
 #define LOG_TAG "NetBpfLoad"
 
 #include <arpa/inet.h>
+#include <bpf/libbpf.h>
 #include <dirent.h>
 #include <elf.h>
 #include <errno.h>
@@ -60,7 +61,8 @@
 #include "bpf_map_def.h"
 
 // The following matches bpf_helpers.h, which is only for inclusion in bpf code
-#define BPFLOADER_MAINLINE_VERSION 42u
+#define BPFLOADER_MAINLINE_S_VERSION 42u
+#define BPFLOADER_MAINLINE_25Q2_VERSION 47u
 
 using android::base::EndsWith;
 using android::base::GetIntProperty;
@@ -121,6 +123,7 @@
 struct Location {
     const char* const dir = "";
     const char* const prefix = "";
+    const bool t_plus = true;
 };
 
 // Returns the build type string (from ro.build.type).
@@ -823,14 +826,14 @@
                                    "tmp_map_" + objName + "_" + mapNames[i];
                 ret = bpfFdPin(fd, createLoc.c_str());
                 if (ret) {
-                    int err = errno;
+                    const int err = errno;
                     ALOGE("create %s -> %d [%d:%s]", createLoc.c_str(), ret, err, strerror(err));
                     return -err;
                 }
                 ret = renameat2(AT_FDCWD, createLoc.c_str(),
                                 AT_FDCWD, mapPinLoc.c_str(), RENAME_NOREPLACE);
                 if (ret) {
-                    int err = errno;
+                    const int err = errno;
                     ALOGE("rename %s %s -> %d [%d:%s]", createLoc.c_str(), mapPinLoc.c_str(), ret,
                           err, strerror(err));
                     return -err;
@@ -838,32 +841,34 @@
             } else {
                 ret = bpfFdPin(fd, mapPinLoc.c_str());
                 if (ret) {
-                    int err = errno;
+                    const int err = errno;
                     ALOGE("pin %s -> %d [%d:%s]", mapPinLoc.c_str(), ret, err, strerror(err));
                     return -err;
                 }
             }
             ret = chmod(mapPinLoc.c_str(), md[i].mode);
             if (ret) {
-                int err = errno;
+                const int err = errno;
                 ALOGE("chmod(%s, 0%o) = %d [%d:%s]", mapPinLoc.c_str(), md[i].mode, ret, err,
                       strerror(err));
                 return -err;
             }
             ret = chown(mapPinLoc.c_str(), (uid_t)md[i].uid, (gid_t)md[i].gid);
             if (ret) {
-                int err = errno;
+                const int err = errno;
                 ALOGE("chown(%s, %u, %u) = %d [%d:%s]", mapPinLoc.c_str(), md[i].uid, md[i].gid,
                       ret, err, strerror(err));
                 return -err;
             }
         }
 
-        int mapId = bpfGetFdMapId(fd);
-        if (mapId == -1) {
-            if (isAtLeastKernelVersion(4, 14, 0))
-                ALOGE("bpfGetFdMapId failed, ret: %d [%d]", mapId, errno);
-        } else {
+        if (isAtLeastKernelVersion(4, 14, 0)) {
+            int mapId = bpfGetFdMapId(fd);
+            if (mapId == -1) {
+                const int err = errno;
+                ALOGE("bpfGetFdMapId failed, errno: %d", err);
+                return -err;
+            }
             ALOGI("map %s id %d", mapPinLoc.c_str(), mapId);
         }
 
@@ -1006,7 +1011,7 @@
         if (access(progPinLoc.c_str(), F_OK) == 0) {
             fd.reset(retrieveProgram(progPinLoc.c_str()));
             ALOGD("New bpf prog load reusing prog %s, ret: %d (%s)", progPinLoc.c_str(), fd.get(),
-                  (!fd.ok() ? std::strerror(errno) : "no error"));
+                  !fd.ok() ? std::strerror(errno) : "ok");
             reuse = true;
         } else {
             static char log_buf[1 << 20];  // 1 MiB logging buffer
@@ -1037,7 +1042,7 @@
 
             ALOGD("BPF_PROG_LOAD call for %s (%s) returned '%s' fd: %d (%s)", elfPath,
                   cs[i].name.c_str(), log_oneline ? log_buf : "{multiline}",
-                  fd.get(), (!fd.ok() ? std::strerror(errno) : "ok"));
+                  fd.get(), !fd.ok() ? std::strerror(errno) : "ok");
 
             if (!fd.ok()) {
                 // kernel NULL terminates log_buf, so this checks for non-empty string
@@ -1066,14 +1071,14 @@
                                    "tmp_prog_" + objName + '_' + string(name);
                 ret = bpfFdPin(fd, createLoc.c_str());
                 if (ret) {
-                    int err = errno;
+                    const int err = errno;
                     ALOGE("create %s -> %d [%d:%s]", createLoc.c_str(), ret, err, strerror(err));
                     return -err;
                 }
                 ret = renameat2(AT_FDCWD, createLoc.c_str(),
                                 AT_FDCWD, progPinLoc.c_str(), RENAME_NOREPLACE);
                 if (ret) {
-                    int err = errno;
+                    const int err = errno;
                     ALOGE("rename %s %s -> %d [%d:%s]", createLoc.c_str(), progPinLoc.c_str(), ret,
                           err, strerror(err));
                     return -err;
@@ -1081,30 +1086,52 @@
             } else {
                 ret = bpfFdPin(fd, progPinLoc.c_str());
                 if (ret) {
-                    int err = errno;
+                    const int err = errno;
                     ALOGE("create %s -> %d [%d:%s]", progPinLoc.c_str(), ret, err, strerror(err));
                     return -err;
                 }
             }
             if (chmod(progPinLoc.c_str(), 0440)) {
-                int err = errno;
+                const int err = errno;
                 ALOGE("chmod %s 0440 -> [%d:%s]", progPinLoc.c_str(), err, strerror(err));
                 return -err;
             }
             if (chown(progPinLoc.c_str(), (uid_t)cs[i].prog_def->uid,
                       (gid_t)cs[i].prog_def->gid)) {
-                int err = errno;
+                const int err = errno;
                 ALOGE("chown %s %d %d -> [%d:%s]", progPinLoc.c_str(), cs[i].prog_def->uid,
                       cs[i].prog_def->gid, err, strerror(err));
                 return -err;
             }
         }
 
-        int progId = bpfGetFdProgId(fd);
-        if (progId == -1) {
-            ALOGE("bpfGetFdProgId failed, ret: %d [%d]", progId, errno);
-        } else {
-            ALOGI("prog %s id %d", progPinLoc.c_str(), progId);
+        if (isAtLeastKernelVersion(4, 14, 0)) {
+            int progId = bpfGetFdProgId(fd);
+            if (progId == -1) {
+                const int err = errno;
+                ALOGE("bpfGetFdProgId failed, errno: %d", err);
+                return -err;
+            }
+
+            int jitLen = bpfGetFdJitProgLen(fd);
+            if (jitLen == -1) {
+                const int err = errno;
+                ALOGE("bpfGetFdJitProgLen failed, ret: %d", err);
+                return -err;
+            }
+
+            int xlatLen = bpfGetFdXlatProgLen(fd);
+            if (xlatLen == -1) {
+                const int err = errno;
+                ALOGE("bpfGetFdXlatProgLen failed, ret: %d", err);
+                return -err;
+            }
+            ALOGI("prog %s id %d len jit:%d xlat:%d", progPinLoc.c_str(), progId, jitLen, xlatLen);
+
+            if (!jitLen && bpfloader_ver >= BPFLOADER_MAINLINE_25Q2_VERSION) {
+                ALOGE("Kernel eBPF JIT failure for %s", progPinLoc.c_str());
+                return -ENOTSUP;
+            }
         }
     }
 
@@ -1162,7 +1189,7 @@
     ret = readCodeSections(elfFile, cs);
     // BPF .o's with no programs are only supported by mainline netbpfload,
     // make sure .o's targeting non-mainline (ie. S) bpfloader don't show up.
-    if (ret == -ENOENT && bpfLoaderMinVer >= BPFLOADER_MAINLINE_VERSION)
+    if (ret == -ENOENT && bpfLoaderMinVer >= BPFLOADER_MAINLINE_S_VERSION)
         return 0;
     if (ret) {
         ALOGE("Couldn't read all code sections in %s", elfPath);
@@ -1191,8 +1218,9 @@
 const Location locations[] = {
         // S+ Tethering mainline module (network_stack): tether offload
         {
-                .dir = BPFROOT "/",
+                .dir = BPFROOT "/tethering/",
                 .prefix = "tethering/",
+                .t_plus = false,
         },
         // T+ Tethering mainline module (shared with netd & system server)
         // netutils_wrapper (for iptables xt_bpf) has access to programs
@@ -1387,39 +1415,15 @@
 }
 
 static int doLoad(char** argv, char * const envp[]) {
+    if (!isAtLeastS) {
+        ALOGE("Impossible - not reachable on Android <S.");
+        // for safety, we don't fail, this is a just-in-case workaround
+        // for any possible busted 'optimized' start everything vendor init hacks on R
+        return 0;
+    }
+
     const bool runningAsRoot = !getuid();  // true iff U QPR3 or V+
 
-    // Any released device will have codename REL instead of a 'real' codename.
-    // For safety: default to 'REL' so we default to unreleased=false on failure.
-    const bool unreleased = (GetProperty("ro.build.version.codename", "REL") != "REL");
-
-    // goog/main device_api_level is bumped *way* before aosp/main api level
-    // (the latter only gets bumped during the push of goog/main to aosp/main)
-    //
-    // Since we develop in AOSP, we want it to behave as if it was bumped too.
-    //
-    // Note that AOSP doesn't really have a good api level (for example during
-    // early V dev cycle, it would have *all* of T, some but not all of U, and some V).
-    // One could argue that for our purposes AOSP api level should be infinite or 10000.
-    //
-    // This could also cause api to be increased in goog/main or other branches,
-    // but I can't imagine a case where this would be a problem: the problem
-    // is rather a too low api level, rather than some ill defined high value.
-    // For example as I write this aosp is 34/U, and goog is 35/V,
-    // we want to treat both goog & aosp as 35/V, but it's harmless if we
-    // treat goog as 36 because that value isn't yet defined to mean anything,
-    // and we thus never compare against it.
-    //
-    // Also note that 'android_get_device_api_level()' is what the
-    //   //system/core/init/apex_init_util.cpp
-    // apex init .XXrc parsing code uses for XX filtering, and that code
-    // (now) similarly uses __ANDROID_API_FUTURE__ for non 'REL' codenames.
-    const int api_level = unreleased ? __ANDROID_API_FUTURE__ : android_get_device_api_level();
-    const bool isAtLeastT = (api_level >= __ANDROID_API_T__);
-    const bool isAtLeastU = (api_level >= __ANDROID_API_U__);
-    const bool isAtLeastV = (api_level >= __ANDROID_API_V__);
-    const bool isAtLeast25Q2 = (api_level > __ANDROID_API_V__);  // TODO: fix >
-
     const int first_api_level = GetIntProperty("ro.board.first_api_level", api_level);
 
     // last in U QPR2 beta1
@@ -1428,17 +1432,19 @@
     const bool has_platform_netbpfload_rc = exists("/system/etc/init/netbpfload.rc");
 
     // Version of Network BpfLoader depends on the Android OS version
-    unsigned int bpfloader_ver = BPFLOADER_MAINLINE_VERSION;  // [42u]
+    unsigned int bpfloader_ver = BPFLOADER_MAINLINE_S_VERSION;  // [42u]
     if (isAtLeastT) ++bpfloader_ver;     // [43] BPFLOADER_MAINLINE_T_VERSION
     if (isAtLeastU) ++bpfloader_ver;     // [44] BPFLOADER_MAINLINE_U_VERSION
     if (runningAsRoot) ++bpfloader_ver;  // [45] BPFLOADER_MAINLINE_U_QPR3_VERSION
     if (isAtLeastV) ++bpfloader_ver;     // [46] BPFLOADER_MAINLINE_V_VERSION
     if (isAtLeast25Q2) ++bpfloader_ver;  // [47] BPFLOADER_MAINLINE_25Q2_VERSION
 
-    ALOGI("NetBpfLoad v0.%u (%s) api:%d/%d kver:%07x (%s) uid:%d rc:%d%d",
+    ALOGI("NetBpfLoad v0.%u (%s) api:%d/%d kver:%07x (%s) libbpf: v%u.%u "
+          "uid:%d rc:%d%d",
           bpfloader_ver, argv[0], android_get_device_api_level(), api_level,
-          kernelVersion(), describeArch(), getuid(),
-          has_platform_bpfloader_rc, has_platform_netbpfload_rc);
+          kernelVersion(), describeArch(), libbpf_major_version(),
+          libbpf_minor_version(), getuid(), has_platform_bpfloader_rc,
+          has_platform_netbpfload_rc);
 
     if (!has_platform_bpfloader_rc && !has_platform_netbpfload_rc) {
         ALOGE("Unable to find platform's bpfloader & netbpfload init scripts.");
@@ -1452,14 +1458,9 @@
 
     logTetheringApexVersion();
 
-    if (!isAtLeastT) {
-        ALOGE("Impossible - not reachable on Android <T.");
-        return 1;
-    }
-
     // both S and T require kernel 4.9 (and eBpf support)
-    if (isAtLeastT && !isAtLeastKernelVersion(4, 9, 0)) {
-        ALOGE("Android T requires kernel 4.9.");
+    if (!isAtLeastKernelVersion(4, 9, 0)) {
+        ALOGE("Android S & T require kernel 4.9.");
         return 1;
     }
 
@@ -1566,7 +1567,7 @@
         if (isArm() && (isTV() || isWear())) {
             // exempt Arm TV or Wear devices (arm32 ABI is far less problematic than x86-32)
             ALOGW("[Arm TV/Wear] 32-bit userspace unsupported on 6.2+ kernels.");
-        } else if (first_api_level <= __ANDROID_API_T__ && isArm()) {
+        } else if (first_api_level <= 33 /*T*/ && isArm()) {
             // also exempt Arm devices upgrading with major kernel rev from T-
             // might possibly be better for them to run with a newer kernel...
             ALOGW("[Arm KernelUpRev] 32-bit userspace unsupported on 6.2+ kernels.");
@@ -1628,18 +1629,22 @@
     //  which could otherwise fail with ENOENT during object pinning or renaming,
     //  due to ordering issues)
     for (const auto& location : locations) {
+        if (location.t_plus && !isAtLeastT) continue;
         if (createSysFsBpfSubDir(location.prefix)) return 1;
     }
 
-    // Note: there's no actual src dir for fs_bpf_loader .o's,
-    // so it is not listed in 'locations[].prefix'.
-    // This is because this is primarily meant for triggering genfscon rules,
-    // and as such this will likely always be the case.
-    // Thus we need to manually create the /sys/fs/bpf/loader subdirectory.
-    if (createSysFsBpfSubDir("loader")) return 1;
+    if (isAtLeastT) {
+        // Note: there's no actual src dir for fs_bpf_loader .o's,
+        // so it is not listed in 'locations[].prefix'.
+        // This is because this is primarily meant for triggering genfscon rules,
+        // and as such this will likely always be the case.
+        // Thus we need to manually create the /sys/fs/bpf/loader subdirectory.
+        if (createSysFsBpfSubDir("loader")) return 1;
+    }
 
     // Load all ELF objects, create programs and maps, and pin them
     for (const auto& location : locations) {
+        if (location.t_plus && !isAtLeastT) continue;
         if (loadAllElfObjects(bpfloader_ver, location) != 0) {
             ALOGE("=== CRITICAL FAILURE LOADING BPF PROGRAMS FROM %s ===", location.dir);
             ALOGE("If this triggers reliably, you're probably missing kernel options or patches.");
@@ -1660,6 +1665,9 @@
         return 1;
     }
 
+    // on S we haven't created this subdir yet, but we need it for 'mainline_done' flag below
+    if (!isAtLeastT && createSysFsBpfSubDir("netd_shared")) return 1;
+
     // leave a flag that we're done
     if (createSysFsBpfSubDir("netd_shared/mainline_done")) return 1;
 
@@ -1694,7 +1702,12 @@
 }  // namespace android
 
 int main(int argc, char** argv, char * const envp[]) {
-    InitLogging(argv, &KernelLogger);
+    if (android::bpf::isAtLeastT) {
+        InitLogging(argv, &KernelLogger);
+    } else {
+        // S lacks the sepolicy to make non-root uid KernelLogger viable
+        InitLogging(argv);
+    }
 
     if (argc == 2 && !strcmp(argv[1], "done")) {
         // we're being re-exec'ed from platform bpfloader to 'finalize' things
diff --git a/bpf/loader/netbpfload.31rc b/bpf/loader/netbpfload.31rc
new file mode 100644
index 0000000..bca7dc8
--- /dev/null
+++ b/bpf/loader/netbpfload.31rc
@@ -0,0 +1,13 @@
+# This file takes effect only on S and Sv2
+# (Note: it does take effect on R as well, but isn't actually used)
+#
+# The service is started from netd's dnsresolver call into ADnsHelper_init()
+# on initial (boot time) startup of netd.
+
+service mdnsd_netbpfload /apex/com.android.tethering/bin/netbpfload
+    capabilities CHOWN SYS_ADMIN NET_ADMIN
+    group system root graphics network_stack net_admin net_bw_acct net_bw_stats net_raw
+    user system
+    rlimit memlock 1073741824 1073741824
+    oneshot
+    reboot_on_failure reboot,netbpfload-failed
diff --git a/bpf/netd/BpfHandler.cpp b/bpf/netd/BpfHandler.cpp
index 125f26b..d41aa81 100644
--- a/bpf/netd/BpfHandler.cpp
+++ b/bpf/netd/BpfHandler.cpp
@@ -22,7 +22,6 @@
 #include <inttypes.h>
 
 #include <android-base/unique_fd.h>
-#include <android-modules-utils/sdk_level.h>
 #include <bpf/WaitForProgsLoaded.h>
 #include <log/log.h>
 #include <netdutils/UidConstants.h>
@@ -37,6 +36,10 @@
 using base::WaitForProperty;
 using bpf::getSocketCookie;
 using bpf::isAtLeastKernelVersion;
+using bpf::isAtLeastT;
+using bpf::isAtLeastU;
+using bpf::isAtLeastV;
+using bpf::isAtLeast25Q2;
 using bpf::queryProgram;
 using bpf::retrieveProgram;
 using netdutils::Status;
@@ -72,18 +75,11 @@
     return netdutils::status::ok;
 }
 
-// Checks if the device is running on release version of Android 25Q2 or newer.
-static bool isAtLeast25Q2() {
-    return android_get_device_api_level() >= 36 ||
-           (android_get_device_api_level() == 35 &&
-            modules::sdklevel::detail::IsAtLeastPreReleaseCodename("Baklava"));
-}
-
 static Status initPrograms(const char* cg2_path) {
     if (!cg2_path) return Status("cg2_path is NULL");
 
     // This code was mainlined in T, so this should be trivially satisfied.
-    if (!modules::sdklevel::IsAtLeastT()) return Status("S- platform is unsupported");
+    if (!isAtLeastT) return Status("S- platform is unsupported");
 
     // S requires eBPF support which was only added in 4.9, so this should be satisfied.
     if (!isAtLeastKernelVersion(4, 9, 0)) {
@@ -91,22 +87,22 @@
     }
 
     // U bumps the kernel requirement up to 4.14
-    if (modules::sdklevel::IsAtLeastU() && !isAtLeastKernelVersion(4, 14, 0)) {
+    if (isAtLeastU && !isAtLeastKernelVersion(4, 14, 0)) {
         return Status("U+ platform with kernel version < 4.14.0 is unsupported");
     }
 
     // U mandates this mount point (though it should also be the case on T)
-    if (modules::sdklevel::IsAtLeastU() && !!strcmp(cg2_path, "/sys/fs/cgroup")) {
+    if (isAtLeastU && !!strcmp(cg2_path, "/sys/fs/cgroup")) {
         return Status("U+ platform with cg2_path != /sys/fs/cgroup is unsupported");
     }
 
     // V bumps the kernel requirement up to 4.19
-    if (modules::sdklevel::IsAtLeastV() && !isAtLeastKernelVersion(4, 19, 0)) {
+    if (isAtLeastV && !isAtLeastKernelVersion(4, 19, 0)) {
         return Status("V+ platform with kernel version < 4.19.0 is unsupported");
     }
 
     // 25Q2 bumps the kernel requirement up to 5.4
-    if (isAtLeast25Q2() && !isAtLeastKernelVersion(5, 4, 0)) {
+    if (isAtLeast25Q2 && !isAtLeastKernelVersion(5, 4, 0)) {
         return Status("25Q2+ platform with kernel version < 5.4.0 is unsupported");
     }
 
@@ -135,7 +131,7 @@
                                     cg_fd, BPF_CGROUP_INET_SOCK_RELEASE));
     }
 
-    if (modules::sdklevel::IsAtLeastV()) {
+    if (isAtLeastV) {
         // V requires 4.19+, so technically this 2nd 'if' is not required, but it
         // doesn't hurt us to try to support AOSP forks that try to support older kernels.
         if (isAtLeastKernelVersion(4, 19, 0)) {
@@ -180,7 +176,7 @@
         if (queryProgram(cg_fd, BPF_CGROUP_INET_SOCK_RELEASE) <= 0) abort();
     }
 
-    if (modules::sdklevel::IsAtLeastV()) {
+    if (isAtLeastV) {
         // V requires 4.19+, so technically this 2nd 'if' is not required, but it
         // doesn't hurt us to try to support AOSP forks that try to support older kernels.
         if (isAtLeastKernelVersion(4, 19, 0)) {
@@ -266,14 +262,13 @@
     // ...unless someone changed 'exec_start bpfloader' to 'start bpfloader'
     // in the rc file.
     //
-    // TODO: should be: if (!modules::sdklevel::IsAtLeastW())
-    if (android_get_device_api_level() <= __ANDROID_API_V__) waitForBpf();
+    if (!isAtLeast25Q2) waitForBpf();
 
     RETURN_IF_NOT_OK(initPrograms(cg2_path));
     RETURN_IF_NOT_OK(initMaps());
 
-    if (android_get_device_api_level() > __ANDROID_API_V__) {
-        // make sure netd can create & write maps.  sepolicy is V+, but enough to enforce on 25Q2+
+    if (isAtLeast25Q2) {
+        // Make sure netd can create & write maps.  sepolicy is V+, but enough to enforce on 25Q2+
         int key = 1;
         int value = 123;
         unique_fd map(bpf::createMap(BPF_MAP_TYPE_ARRAY, sizeof(key), sizeof(value), 2, 0));
@@ -346,8 +341,8 @@
     if (chargeUid == AID_CLAT) return -EPERM;
 
     // The socket destroy listener only monitors on the group {INET_TCP, INET_UDP, INET6_TCP,
-    // INET6_UDP}. Tagging listener unsupported socket causes that the tag can't be removed from
-    // tag map automatically. Eventually, the tag map may run out of space because of dead tag
+    // INET6_UDP}. Tagging listener unsupported sockets (on <5.10) means the tag cannot be
+    // removed from tag map automatically. Eventually, it may run out of space due to dead tag
     // entries. Note that although tagSocket() of net client has already denied the family which
     // is neither AF_INET nor AF_INET6, the family validation is still added here just in case.
     // See tagSocket in system/netd/client/NetdClient.cpp and
@@ -365,15 +360,19 @@
         return -EAFNOSUPPORT;
     }
 
-    int socketProto;
-    socklen_t protoLen = sizeof(socketProto);
-    if (getsockopt(sockFd, SOL_SOCKET, SO_PROTOCOL, &socketProto, &protoLen)) {
-        ALOGE("Failed to getsockopt SO_PROTOCOL: %s, fd: %d", strerror(errno), sockFd);
-        return -errno;
-    }
-    if (socketProto != IPPROTO_UDP && socketProto != IPPROTO_TCP) {
-        ALOGV("Unsupported protocol: %d", socketProto);
-        return -EPROTONOSUPPORT;
+    // On 5.10+ the BPF_CGROUP_INET_SOCK_RELEASE hook takes care of cookie tag map cleanup
+    // during socket destruction. As such the socket destroy listener is superfluous.
+    if (!isAtLeastKernelVersion(5, 10, 0)) {
+        int socketProto;
+        socklen_t protoLen = sizeof(socketProto);
+        if (getsockopt(sockFd, SOL_SOCKET, SO_PROTOCOL, &socketProto, &protoLen)) {
+            ALOGE("Failed to getsockopt SO_PROTOCOL: %s, fd: %d", strerror(errno), sockFd);
+            return -errno;
+        }
+        if (socketProto != IPPROTO_UDP && socketProto != IPPROTO_TCP) {
+            ALOGV("Unsupported protocol: %d", socketProto);
+            return -EPROTONOSUPPORT;
+        }
     }
 
     uint64_t sock_cookie = getSocketCookie(sockFd);
diff --git a/bpf/netd/BpfHandlerTest.cpp b/bpf/netd/BpfHandlerTest.cpp
index b38fa16..4002b4c 100644
--- a/bpf/netd/BpfHandlerTest.cpp
+++ b/bpf/netd/BpfHandlerTest.cpp
@@ -191,7 +191,11 @@
     int rawSocket = socket(AF_INET, SOCK_RAW | SOCK_CLOEXEC, IPPROTO_RAW);
     EXPECT_LE(0, rawSocket);
     EXPECT_NE(NONEXISTENT_COOKIE, getSocketCookie(rawSocket));
-    EXPECT_EQ(-EPROTONOSUPPORT, mBh.tagSocket(rawSocket, TEST_TAG, TEST_UID, TEST_UID));
+    if (isAtLeastKernelVersion(5, 10, 0)) {
+        EXPECT_EQ(0, mBh.tagSocket(rawSocket, TEST_TAG, TEST_UID, TEST_UID));
+    } else {
+        EXPECT_EQ(-EPROTONOSUPPORT, mBh.tagSocket(rawSocket, TEST_TAG, TEST_UID, TEST_UID));
+    }
 }
 
 TEST_F(BpfHandlerTest, TestTagSocketWithoutPermission) {
diff --git a/bpf/progs/Android.bp b/bpf/progs/Android.bp
index 20d194c..2bfe613 100644
--- a/bpf/progs/Android.bp
+++ b/bpf/progs/Android.bp
@@ -69,32 +69,16 @@
     sub_dir: "net_shared",
 }
 
-// Ships to Android S, the bpfloader of which fails to parse BTF enabled .o's.
 bpf {
     name: "offload.o",
     srcs: ["offload.c"],
-    btf: false,
+    sub_dir: "tethering",
 }
 
-// This version ships to Android T+ which uses mainline netbpfload.
-bpf {
-    name: "offload@mainline.o",
-    srcs: ["offload@mainline.c"],
-    cflags: ["-DMAINLINE"],
-}
-
-// Ships to Android S, the bpfloader of which fails to parse BTF enabled .o's.
 bpf {
     name: "test.o",
     srcs: ["test.c"],
-    btf: false,
-}
-
-// This version ships to Android T+ which uses mainline netbpfload.
-bpf {
-    name: "test@mainline.o",
-    srcs: ["test@mainline.c"],
-    cflags: ["-DMAINLINE"],
+    sub_dir: "tethering",
 }
 
 bpf {
diff --git a/bpf/progs/clatd.c b/bpf/progs/clatd.c
index 2d4551e..2bb9d6f 100644
--- a/bpf/progs/clatd.c
+++ b/bpf/progs/clatd.c
@@ -288,6 +288,9 @@
     // We cannot handle IP options, just standard 20 byte == 5 dword minimal IPv4 header
     if (ip4->ihl != 5) return TC_ACT_PIPE;
 
+    // Packet must not be multicast
+    if ((ip4->daddr & 0xf0000000) == 0xe0000000) return TC_ACT_PIPE;
+
     // Calculate the IPv4 one's complement checksum of the IPv4 header.
     __wsum sum4 = 0;
     for (unsigned i = 0; i < sizeof(*ip4) / sizeof(__u16); ++i) {
diff --git a/bpf/progs/offload.c b/bpf/progs/offload.c
index 0f23844..b34fe6f 100644
--- a/bpf/progs/offload.c
+++ b/bpf/progs/offload.c
@@ -14,16 +14,8 @@
  * limitations under the License.
  */
 
-#ifdef MAINLINE
-// BTF is incompatible with bpfloaders < v0.10, hence for S (v0.2) we must
-// ship a different file than for later versions, but we need bpfloader v0.25+
-// for obj@ver.o support
-#define BPFLOADER_MIN_VER BPFLOADER_MAINLINE_T_VERSION
-#else /* MAINLINE */
-// The resulting .o needs to load on the Android S bpfloader
-#define BPFLOADER_MIN_VER BPFLOADER_S_VERSION
-#define BPFLOADER_MAX_VER BPFLOADER_T_VERSION
-#endif /* MAINLINE */
+// The resulting .o needs to load on Android S+
+#define BPFLOADER_MIN_VER BPFLOADER_MAINLINE_S_VERSION
 
 #include "bpf_net_helpers.h"
 #include "offload.h"
diff --git a/bpf/progs/test.c b/bpf/progs/test.c
index 8585118..4dba6b9 100644
--- a/bpf/progs/test.c
+++ b/bpf/progs/test.c
@@ -14,16 +14,8 @@
  * limitations under the License.
  */
 
-#ifdef MAINLINE
-// BTF is incompatible with bpfloaders < v0.10, hence for S (v0.2) we must
-// ship a different file than for later versions, but we need bpfloader v0.25+
-// for obj@ver.o support
-#define BPFLOADER_MIN_VER BPFLOADER_MAINLINE_T_VERSION
-#else /* MAINLINE */
-// The resulting .o needs to load on the Android S bpfloader
-#define BPFLOADER_MIN_VER BPFLOADER_S_VERSION
-#define BPFLOADER_MAX_VER BPFLOADER_T_VERSION
-#endif /* MAINLINE */
+// The resulting .o needs to load on Android S+
+#define BPFLOADER_MIN_VER BPFLOADER_MAINLINE_S_VERSION
 
 // This is non production code, only used for testing
 // Needed because the bitmap array definition is non-kosher for pre-T OS devices.
diff --git a/bpf/syscall_wrappers/include/BpfSyscallWrappers.h b/bpf/syscall_wrappers/include/BpfSyscallWrappers.h
index a31445a..1d72b77 100644
--- a/bpf/syscall_wrappers/include/BpfSyscallWrappers.h
+++ b/bpf/syscall_wrappers/include/BpfSyscallWrappers.h
@@ -269,7 +269,7 @@
     return info.FIELD; \
 }
 
-// All 7 of these fields are already present in Linux v4.14 (even ACK 4.14-P)
+// All 9 of these fields are already present in Linux v4.14 (even ACK 4.14-P)
 // while BPF_OBJ_GET_INFO_BY_FD is not implemented at all in v4.9 (even ACK 4.9-Q)
 DEFINE_BPF_GET_FD(map, MapType, type)            // int bpfGetFdMapType(const borrowed_fd& map_fd)
 DEFINE_BPF_GET_FD(map, MapId, id)                // int bpfGetFdMapId(const borrowed_fd& map_fd)
@@ -278,6 +278,8 @@
 DEFINE_BPF_GET_FD(map, MaxEntries, max_entries)  // int bpfGetFdMaxEntries(const borrowed_fd& map_fd)
 DEFINE_BPF_GET_FD(map, MapFlags, map_flags)      // int bpfGetFdMapFlags(const borrowed_fd& map_fd)
 DEFINE_BPF_GET_FD(prog, ProgId, id)              // int bpfGetFdProgId(const borrowed_fd& prog_fd)
+DEFINE_BPF_GET_FD(prog, JitProgLen, jited_prog_len)   // int bpfGetFdJitProgLen(...)
+DEFINE_BPF_GET_FD(prog, XlatProgLen, xlated_prog_len) // int bpfGetFdXlatProgLen(...)
 
 #undef DEFINE_BPF_GET_FD
 
diff --git a/bpf/tests/mts/bpf_existence_test.cpp b/bpf/tests/mts/bpf_existence_test.cpp
index 2cfa546..4d5f9b5 100644
--- a/bpf/tests/mts/bpf_existence_test.cpp
+++ b/bpf/tests/mts/bpf_existence_test.cpp
@@ -21,7 +21,6 @@
 #include <string>
 
 #include <android-base/properties.h>
-#include <android-modules-utils/sdk_level.h>
 #include <android/api-level.h>
 #include <bpf/BpfUtils.h>
 
@@ -32,11 +31,12 @@
 using std::string;
 
 using android::bpf::isAtLeastKernelVersion;
-using android::modules::sdklevel::IsAtLeastR;
-using android::modules::sdklevel::IsAtLeastS;
-using android::modules::sdklevel::IsAtLeastT;
-using android::modules::sdklevel::IsAtLeastU;
-using android::modules::sdklevel::IsAtLeastV;
+using android::bpf::isAtLeastR;
+using android::bpf::isAtLeastS;
+using android::bpf::isAtLeastT;
+using android::bpf::isAtLeastU;
+using android::bpf::isAtLeastV;
+using android::bpf::isAtLeast25Q2;
 
 #define PLATFORM "/sys/fs/bpf/"
 #define TETHERING "/sys/fs/bpf/tethering/"
@@ -48,11 +48,6 @@
 class BpfExistenceTest : public ::testing::Test {
 };
 
-//ToDo: replace isAtLeast25Q2 with IsAtLeastB once sdk_level have been upgraded to 36 on aosp/main
-const bool unreleased = (android::base::GetProperty("ro.build.version.codename", "REL") != "REL");
-const int api_level = unreleased ? __ANDROID_API_FUTURE__ : android_get_device_api_level();
-const bool isAtLeast25Q2 = (api_level > __ANDROID_API_V__);
-
 // Part of Android R platform (for 4.9+), but mainlined in S
 static const set<string> PLATFORM_ONLY_IN_R = {
     PLATFORM "map_offload_tether_ingress_map",
@@ -194,33 +189,38 @@
     // and for the presence of mainline stuff.
 
     // Note: Q is no longer supported by mainline
-    ASSERT_TRUE(IsAtLeastR());
+    ASSERT_TRUE(isAtLeastR);
 
     // R can potentially run on pre-4.9 kernel non-eBPF capable devices.
-    DO_EXPECT(IsAtLeastR() && !IsAtLeastS() && isAtLeastKernelVersion(4, 9, 0), PLATFORM_ONLY_IN_R);
+    DO_EXPECT(isAtLeastR && !isAtLeastS && isAtLeastKernelVersion(4, 9, 0), PLATFORM_ONLY_IN_R);
 
     // S requires Linux Kernel 4.9+ and thus requires eBPF support.
-    if (IsAtLeastS()) ASSERT_TRUE(isAtLeastKernelVersion(4, 9, 0));
-    DO_EXPECT(IsAtLeastS(), MAINLINE_FOR_S_PLUS);
+    if (isAtLeastS) ASSERT_TRUE(isAtLeastKernelVersion(4, 9, 0));
+
+    // on S without a new enough DnsResolver apex, NetBpfLoad doesn't get triggered,
+    // and thus no mainline programs get loaded.
+    bool mainlineBpfCapableResolve = !access("/apex/com.android.resolv/NetBpfLoad-S.flag", F_OK);
+    bool mainlineNetBpfLoad = isAtLeastT || mainlineBpfCapableResolve;
+    DO_EXPECT(isAtLeastS && mainlineNetBpfLoad, MAINLINE_FOR_S_PLUS);
 
     // Nothing added or removed in SCv2.
 
     // T still only requires Linux Kernel 4.9+.
-    DO_EXPECT(IsAtLeastT(), MAINLINE_FOR_T_PLUS);
-    DO_EXPECT(IsAtLeastT() && isAtLeastKernelVersion(4, 14, 0), MAINLINE_FOR_T_4_14_PLUS);
-    DO_EXPECT(IsAtLeastT() && isAtLeastKernelVersion(4, 19, 0), MAINLINE_FOR_T_4_19_PLUS);
-    DO_EXPECT(IsAtLeastT() && isAtLeastKernelVersion(5, 10, 0), MAINLINE_FOR_T_5_10_PLUS);
-    DO_EXPECT(IsAtLeastT() && isAtLeastKernelVersion(5, 15, 0), MAINLINE_FOR_T_5_15_PLUS);
+    DO_EXPECT(isAtLeastT, MAINLINE_FOR_T_PLUS);
+    DO_EXPECT(isAtLeastT && isAtLeastKernelVersion(4, 14, 0), MAINLINE_FOR_T_4_14_PLUS);
+    DO_EXPECT(isAtLeastT && isAtLeastKernelVersion(4, 19, 0), MAINLINE_FOR_T_4_19_PLUS);
+    DO_EXPECT(isAtLeastT && isAtLeastKernelVersion(5, 10, 0), MAINLINE_FOR_T_5_10_PLUS);
+    DO_EXPECT(isAtLeastT && isAtLeastKernelVersion(5, 15, 0), MAINLINE_FOR_T_5_15_PLUS);
 
     // U requires Linux Kernel 4.14+, but nothing (as yet) added or removed in U.
-    if (IsAtLeastU()) ASSERT_TRUE(isAtLeastKernelVersion(4, 14, 0));
-    DO_EXPECT(IsAtLeastU(), MAINLINE_FOR_U_PLUS);
-    DO_EXPECT(IsAtLeastU() && isAtLeastKernelVersion(5, 10, 0), MAINLINE_FOR_U_5_10_PLUS);
+    if (isAtLeastU) ASSERT_TRUE(isAtLeastKernelVersion(4, 14, 0));
+    DO_EXPECT(isAtLeastU, MAINLINE_FOR_U_PLUS);
+    DO_EXPECT(isAtLeastU && isAtLeastKernelVersion(5, 10, 0), MAINLINE_FOR_U_5_10_PLUS);
 
     // V requires Linux Kernel 4.19+, but nothing (as yet) added or removed in V.
-    if (IsAtLeastV()) ASSERT_TRUE(isAtLeastKernelVersion(4, 19, 0));
-    DO_EXPECT(IsAtLeastV(), MAINLINE_FOR_V_PLUS);
-    DO_EXPECT(IsAtLeastV() && isAtLeastKernelVersion(5, 4, 0), MAINLINE_FOR_V_5_4_PLUS);
+    if (isAtLeastV) ASSERT_TRUE(isAtLeastKernelVersion(4, 19, 0));
+    DO_EXPECT(isAtLeastV, MAINLINE_FOR_V_PLUS);
+    DO_EXPECT(isAtLeastV && isAtLeastKernelVersion(5, 4, 0), MAINLINE_FOR_V_5_4_PLUS);
 
     if (isAtLeast25Q2) ASSERT_TRUE(isAtLeastKernelVersion(5, 4, 0));
     DO_EXPECT(isAtLeast25Q2, MAINLINE_FOR_25Q2_PLUS);
diff --git a/clatd/ipv4.c b/clatd/ipv4.c
index 2be02e3..81bf87b 100644
--- a/clatd/ipv4.c
+++ b/clatd/ipv4.c
@@ -85,6 +85,11 @@
     return 0;
   }
 
+  if ((header->daddr & 0xf0000000) == 0xe0000000) {
+    logmsg_dbg(ANDROID_LOG_INFO, "ip_packet/daddr is multicast: %x", header->daddr);
+    return 0;
+  }
+
   /* rfc6145 - If any IPv4 options are present in the IPv4 packet, they MUST be
    * ignored and the packet translated normally; there is no attempt to
    * translate the options.
diff --git a/common/flags.aconfig b/common/flags.aconfig
index 5f279fa..51b4fc0 100644
--- a/common/flags.aconfig
+++ b/common/flags.aconfig
@@ -171,6 +171,6 @@
   is_exported: true
   namespace: "android_core_networking"
   description: "Flag for controlling access to the local network behind a new runtime permission. Requires ConnectivityCompatChanges.RESTRICT_LOCAL_NETWORK to enable feature."
-  bug: "365139289"
+  bug: "388774939"
   is_fixed_read_only: true
 }
diff --git a/framework/Android.bp b/framework/Android.bp
index d6ee759..ab3af9a 100644
--- a/framework/Android.bp
+++ b/framework/Android.bp
@@ -162,7 +162,6 @@
     srcs: [":httpclient_api_sources"],
     static_libs: [
         "com.android.net.http.flags-aconfig-java",
-        "modules-utils-expresslog",
     ],
     libs: [
         "androidx.annotation_annotation",
@@ -296,7 +295,6 @@
         ":framework-connectivity-t-pre-jarjar{.jar}",
         ":framework-connectivity.stubs.module_lib{.jar}",
         ":framework-connectivity-t.stubs.module_lib{.jar}",
-        ":framework-connectivity-module-api-stubs-including-flagged{.jar}",
         "jarjar-excludes.txt",
     ],
     tools: [
@@ -309,7 +307,6 @@
         "--prefix android.net.connectivity " +
         "--apistubs $(location :framework-connectivity.stubs.module_lib{.jar}) " +
         "--apistubs $(location :framework-connectivity-t.stubs.module_lib{.jar}) " +
-        "--apistubs $(location :framework-connectivity-module-api-stubs-including-flagged{.jar}) " +
         // Make a ":"-separated list. There will be an extra ":" but empty items are ignored.
         "--unsupportedapi $$(printf ':%s' $(locations :connectivity-hiddenapi-files)) " +
         "--excludes $(location jarjar-excludes.txt) " +
@@ -321,35 +318,6 @@
     ],
 }
 
-droidstubs {
-    name: "framework-connectivity-module-api-stubs-including-flagged-droidstubs",
-    srcs: [
-        ":framework-connectivity-sources",
-        ":framework-connectivity-tiramisu-updatable-sources",
-        ":framework-networksecurity-sources",
-        ":framework-nearby-java-sources",
-        ":framework-thread-sources",
-    ],
-    flags: [
-        "--show-for-stub-purposes-annotation android.annotation.SystemApi" +
-            "\\(client=android.annotation.SystemApi.Client.PRIVILEGED_APPS\\)",
-        "--show-for-stub-purposes-annotation android.annotation.SystemApi" +
-            "\\(client=android.annotation.SystemApi.Client.MODULE_LIBRARIES\\)",
-    ],
-    aidl: {
-        include_dirs: [
-            "packages/modules/Connectivity/framework/aidl-export",
-            "packages/modules/Connectivity/Tethering/common/TetheringLib/src",
-            "frameworks/native/aidl/binder", // For PersistableBundle.aidl
-        ],
-    },
-}
-
-java_library {
-    name: "framework-connectivity-module-api-stubs-including-flagged",
-    srcs: [":framework-connectivity-module-api-stubs-including-flagged-droidstubs"],
-}
-
 // Library providing limited APIs within the connectivity module, so that R+ components like
 // Tethering have a controlled way to depend on newer components like framework-connectivity that
 // are not loaded on R.
diff --git a/framework/jni/android_net_NetworkUtils.cpp b/framework/jni/android_net_NetworkUtils.cpp
index 3779a00..7404f32 100644
--- a/framework/jni/android_net_NetworkUtils.cpp
+++ b/framework/jni/android_net_NetworkUtils.cpp
@@ -23,9 +23,9 @@
 #include <netinet/in.h>
 #include <string.h>
 
+#include <DnsProxydProtocol.h> // NETID_USE_LOCAL_NAMESERVERS
 #include <bpf/BpfClassic.h>
 #include <bpf/KernelUtils.h>
-#include <DnsProxydProtocol.h> // NETID_USE_LOCAL_NAMESERVERS
 #include <nativehelper/JNIPlatformHelp.h>
 #include <nativehelper/ScopedPrimitiveArray.h>
 #include <utils/Log.h>
@@ -259,6 +259,21 @@
     return bpf::isX86();
 }
 
+static jlong android_net_utils_getSocketCookie(JNIEnv *env, jclass clazz,
+                                               jobject javaFd) {
+    int sock = AFileDescriptor_getFd(env, javaFd);
+    uint64_t cookie = 0;
+    socklen_t cookie_len = sizeof(cookie);
+    if (getsockopt(sock, SOL_SOCKET, SO_COOKIE, &cookie, &cookie_len)) {
+        // Failure is almost certainly either EBADF or ENOTSOCK
+        jniThrowErrnoException(env, "getSocketCookie", errno);
+    } else if (cookie_len != sizeof(cookie)) {
+        // This probably cannot actually happen, but...
+        jniThrowErrnoException(env, "getSocketCookie", 523); // EBADCOOKIE
+    }
+    return static_cast<jlong>(cookie);
+}
+
 // ----------------------------------------------------------------------------
 
 /*
@@ -283,6 +298,7 @@
     (void*) android_net_utils_setsockoptBytes},
     { "isKernel64Bit", "()Z", (void*) android_net_utils_isKernel64Bit },
     { "isKernelX86", "()Z", (void*) android_net_utils_isKernelX86 },
+    { "getSocketCookie", "(Ljava/io/FileDescriptor;)J", (void*) android_net_utils_getSocketCookie },
 };
 // clang-format on
 
diff --git a/framework/src/android/net/L2capNetworkSpecifier.java b/framework/src/android/net/L2capNetworkSpecifier.java
index cfc9ed9..93f9352 100644
--- a/framework/src/android/net/L2capNetworkSpecifier.java
+++ b/framework/src/android/net/L2capNetworkSpecifier.java
@@ -170,6 +170,51 @@
         return mPsm;
     }
 
+    /**
+     * Checks whether the given L2capNetworkSpecifier is valid as part of a server network
+     * reservation request.
+     *
+     * @hide
+     */
+    public boolean isValidServerReservationSpecifier() {
+        // The ROLE_SERVER offer can be satisfied by a ROLE_ANY request.
+        if (mRole != ROLE_SERVER) return false;
+
+        // HEADER_COMPRESSION_ANY is never valid in a request.
+        if (mHeaderCompression == HEADER_COMPRESSION_ANY) return false;
+
+        // Remote address must be null for ROLE_SERVER requests.
+        if (mRemoteAddress != null) return false;
+
+        // reservation must allocate a PSM, so only PSM_ANY can be passed.
+        if (mPsm != PSM_ANY) return false;
+
+        return true;
+    }
+
+    /**
+     * Checks whether the given L2capNetworkSpecifier is valid as part of a client network request.
+     *
+     * @hide
+     */
+    public boolean isValidClientRequestSpecifier() {
+        // The ROLE_CLIENT offer can be satisfied by a ROLE_ANY request.
+        if (mRole != ROLE_CLIENT) return false;
+
+        // HEADER_COMPRESSION_ANY is never valid in a request.
+        if (mHeaderCompression == HEADER_COMPRESSION_ANY) return false;
+
+        // Remote address must not be null for ROLE_CLIENT requests.
+        if (mRemoteAddress == null) return false;
+
+        // Client network requests require a PSM to be specified.
+        // Ensure the PSM is within the valid range of dynamic BLE L2CAP values.
+        if (mPsm < 0x80) return false;
+        if (mPsm > 0xFF) return false;
+
+        return true;
+    }
+
     /** A builder class for L2capNetworkSpecifier. */
     public static final class Builder {
         @Role
diff --git a/framework/src/android/net/NetworkAgentConfig.java b/framework/src/android/net/NetworkAgentConfig.java
index deaa734..da12a0a 100644
--- a/framework/src/android/net/NetworkAgentConfig.java
+++ b/framework/src/android/net/NetworkAgentConfig.java
@@ -272,27 +272,6 @@
         return mVpnRequiresValidation;
     }
 
-    /**
-     * Whether the native network creation should be skipped.
-     *
-     * If set, the native network and routes should be maintained by the caller.
-     *
-     * @hide
-     */
-    private boolean mSkipNativeNetworkCreation = false;
-
-
-    /**
-     * @return Whether the native network creation should be skipped.
-     * @hide
-     */
-    // TODO: Expose API when ready.
-    // @FlaggedApi(Flags.FLAG_TETHERING_NETWORK_AGENT)
-    // @SystemApi(client = MODULE_LIBRARIES) when ready.
-    public boolean shouldSkipNativeNetworkCreation() {
-        return mSkipNativeNetworkCreation;
-    }
-
     /** @hide */
     public NetworkAgentConfig() {
     }
@@ -314,7 +293,6 @@
             mLegacyExtraInfo = nac.mLegacyExtraInfo;
             excludeLocalRouteVpn = nac.excludeLocalRouteVpn;
             mVpnRequiresValidation = nac.mVpnRequiresValidation;
-            mSkipNativeNetworkCreation = nac.mSkipNativeNetworkCreation;
         }
     }
 
@@ -506,26 +484,6 @@
         }
 
         /**
-         * Sets the native network creation should be skipped.
-         *
-         * @return this builder, to facilitate chaining.
-         * @hide
-         */
-        @NonNull
-        // TODO: Expose API when ready.
-        // @FlaggedApi(Flags.FLAG_TETHERING_NETWORK_AGENT)
-        // @SystemApi(client = MODULE_LIBRARIES) when ready.
-        public Builder setSkipNativeNetworkCreation(boolean skipNativeNetworkCreation) {
-            if (!SdkLevel.isAtLeastV()) {
-                // Local agents are supported starting on U on TVs and on V on everything else.
-                // Thus, only support this flag on V+.
-                throw new UnsupportedOperationException("Method is not supported");
-            }
-            mConfig.mSkipNativeNetworkCreation = skipNativeNetworkCreation;
-            return this;
-        }
-
-        /**
          * Returns the constructed {@link NetworkAgentConfig} object.
          */
         @NonNull
@@ -552,8 +510,7 @@
                 && Objects.equals(legacySubTypeName, that.legacySubTypeName)
                 && Objects.equals(mLegacyExtraInfo, that.mLegacyExtraInfo)
                 && excludeLocalRouteVpn == that.excludeLocalRouteVpn
-                && mVpnRequiresValidation == that.mVpnRequiresValidation
-                && mSkipNativeNetworkCreation == that.mSkipNativeNetworkCreation;
+                && mVpnRequiresValidation == that.mVpnRequiresValidation;
     }
 
     @Override
@@ -561,8 +518,7 @@
         return Objects.hash(allowBypass, explicitlySelected, acceptUnvalidated,
                 acceptPartialConnectivity, provisioningNotificationDisabled, subscriberId,
                 skip464xlat, legacyType, legacySubType, legacyTypeName, legacySubTypeName,
-                mLegacyExtraInfo, excludeLocalRouteVpn, mVpnRequiresValidation,
-                mSkipNativeNetworkCreation);
+                mLegacyExtraInfo, excludeLocalRouteVpn, mVpnRequiresValidation);
     }
 
     @Override
@@ -583,7 +539,6 @@
                 + ", legacyExtraInfo = '" + mLegacyExtraInfo + '\''
                 + ", excludeLocalRouteVpn = '" + excludeLocalRouteVpn + '\''
                 + ", vpnRequiresValidation = '" + mVpnRequiresValidation + '\''
-                + ", skipNativeNetworkCreation = '" + mSkipNativeNetworkCreation + '\''
                 + "}";
     }
 
@@ -608,35 +563,33 @@
         out.writeString(mLegacyExtraInfo);
         out.writeInt(excludeLocalRouteVpn ? 1 : 0);
         out.writeInt(mVpnRequiresValidation ? 1 : 0);
-        out.writeInt(mSkipNativeNetworkCreation ? 1 : 0);
     }
 
     public static final @NonNull Creator<NetworkAgentConfig> CREATOR =
             new Creator<NetworkAgentConfig>() {
-                @Override
-                public NetworkAgentConfig createFromParcel(Parcel in) {
-                    NetworkAgentConfig networkAgentConfig = new NetworkAgentConfig();
-                    networkAgentConfig.allowBypass = in.readInt() != 0;
-                    networkAgentConfig.explicitlySelected = in.readInt() != 0;
-                    networkAgentConfig.acceptUnvalidated = in.readInt() != 0;
-                    networkAgentConfig.acceptPartialConnectivity = in.readInt() != 0;
-                    networkAgentConfig.subscriberId = in.readString();
-                    networkAgentConfig.provisioningNotificationDisabled = in.readInt() != 0;
-                    networkAgentConfig.skip464xlat = in.readInt() != 0;
-                    networkAgentConfig.legacyType = in.readInt();
-                    networkAgentConfig.legacyTypeName = in.readString();
-                    networkAgentConfig.legacySubType = in.readInt();
-                    networkAgentConfig.legacySubTypeName = in.readString();
-                    networkAgentConfig.mLegacyExtraInfo = in.readString();
-                    networkAgentConfig.excludeLocalRouteVpn = in.readInt() != 0;
-                    networkAgentConfig.mVpnRequiresValidation = in.readInt() != 0;
-                    networkAgentConfig.mSkipNativeNetworkCreation = in.readInt() != 0;
-                    return networkAgentConfig;
-                }
+        @Override
+        public NetworkAgentConfig createFromParcel(Parcel in) {
+            NetworkAgentConfig networkAgentConfig = new NetworkAgentConfig();
+            networkAgentConfig.allowBypass = in.readInt() != 0;
+            networkAgentConfig.explicitlySelected = in.readInt() != 0;
+            networkAgentConfig.acceptUnvalidated = in.readInt() != 0;
+            networkAgentConfig.acceptPartialConnectivity = in.readInt() != 0;
+            networkAgentConfig.subscriberId = in.readString();
+            networkAgentConfig.provisioningNotificationDisabled = in.readInt() != 0;
+            networkAgentConfig.skip464xlat = in.readInt() != 0;
+            networkAgentConfig.legacyType = in.readInt();
+            networkAgentConfig.legacyTypeName = in.readString();
+            networkAgentConfig.legacySubType = in.readInt();
+            networkAgentConfig.legacySubTypeName = in.readString();
+            networkAgentConfig.mLegacyExtraInfo = in.readString();
+            networkAgentConfig.excludeLocalRouteVpn = in.readInt() != 0;
+            networkAgentConfig.mVpnRequiresValidation = in.readInt() != 0;
+            return networkAgentConfig;
+        }
 
-                @Override
-                public NetworkAgentConfig[] newArray(int size) {
-                    return new NetworkAgentConfig[size];
-                }
-            };
+        @Override
+        public NetworkAgentConfig[] newArray(int size) {
+            return new NetworkAgentConfig[size];
+        }
+    };
 }
diff --git a/framework/src/android/net/NetworkUtils.java b/framework/src/android/net/NetworkUtils.java
index 18feb84..6b2eb08 100644
--- a/framework/src/android/net/NetworkUtils.java
+++ b/framework/src/android/net/NetworkUtils.java
@@ -443,4 +443,13 @@
 
     /** Returns whether the Linux Kernel is x86 */
     public static native boolean isKernelX86();
+
+    /**
+     * Returns socket cookie.
+     *
+     * @param fd The socket file descriptor
+     * @return The socket cookie.
+     * @throws ErrnoException if retrieving the socket cookie fails.
+     */
+    public static native long getSocketCookie(FileDescriptor fd) throws ErrnoException;
 }
diff --git a/framework/src/android/net/TestNetworkManager.java b/framework/src/android/net/TestNetworkManager.java
index 416c6de..cbc7a4f 100644
--- a/framework/src/android/net/TestNetworkManager.java
+++ b/framework/src/android/net/TestNetworkManager.java
@@ -23,8 +23,10 @@
 import android.os.IBinder;
 import android.os.RemoteException;
 
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
+import java.util.List;
 import java.util.Objects;
 
 /**
@@ -196,45 +198,6 @@
     }
 
     /**
-     * Create a tap interface for testing purposes
-     *
-     * @param linkAddrs an array of LinkAddresses to assign to the TAP interface
-     * @return A TestNetworkInterface representing the underlying TAP interface. Close the contained
-     *     ParcelFileDescriptor to tear down the TAP interface.
-     * @hide
-     */
-    @RequiresPermission(Manifest.permission.MANAGE_TEST_NETWORKS)
-    @NonNull
-    public TestNetworkInterface createTapInterface(@NonNull LinkAddress[] linkAddrs) {
-        try {
-            return mService.createInterface(TAP, CARRIER_UP, BRING_UP, USE_IPV6_PROV_DELAY,
-                    linkAddrs, null /* iface */);
-        } catch (RemoteException e) {
-            throw e.rethrowFromSystemServer();
-        }
-    }
-
-    /**
-     * Create a tap interface for testing purposes
-     *
-     * @param bringUp whether to bring up the interface before returning it.
-     *
-     * @return A ParcelFileDescriptor of the underlying TAP interface. Close this to tear down the
-     *     TAP interface.
-     * @hide
-     */
-    @RequiresPermission(Manifest.permission.MANAGE_TEST_NETWORKS)
-    @NonNull
-    public TestNetworkInterface createTapInterface(boolean bringUp) {
-        try {
-            return mService.createInterface(TAP, CARRIER_UP, bringUp, USE_IPV6_PROV_DELAY,
-                    NO_ADDRS, null /* iface */);
-        } catch (RemoteException e) {
-            throw e.rethrowFromSystemServer();
-        }
-    }
-
-    /**
      * Create a tap interface with a given interface name for testing purposes
      *
      * @param bringUp whether to bring up the interface before returning it.
@@ -258,26 +221,6 @@
     }
 
     /**
-     * Create a tap interface with or without carrier for testing purposes.
-     *
-     * Note: setting carrierUp = false is not supported until kernel version 6.0.
-     *
-     * @param carrierUp whether the created interface has a carrier or not.
-     * @param bringUp whether to bring up the interface before returning it.
-     * @hide
-     */
-    @RequiresPermission(Manifest.permission.MANAGE_TEST_NETWORKS)
-    @NonNull
-    public TestNetworkInterface createTapInterface(boolean carrierUp, boolean bringUp) {
-        try {
-            return mService.createInterface(TAP, carrierUp, bringUp, USE_IPV6_PROV_DELAY, NO_ADDRS,
-                    null /* iface */);
-        } catch (RemoteException e) {
-            throw e.rethrowFromSystemServer();
-        }
-    }
-
-    /**
      * Create a tap interface for testing purposes.
      *
      * Note: setting carrierUp = false is not supported until kernel version 6.0.
@@ -300,27 +243,6 @@
     }
 
     /**
-     * Create a tap interface for testing purposes.
-     *
-     * @param disableIpv6ProvisioningDelay whether to disable DAD and RS delay.
-     * @param linkAddrs an array of LinkAddresses to assign to the TAP interface
-     * @return A TestNetworkInterface representing the underlying TAP interface. Close the contained
-     *     ParcelFileDescriptor to tear down the TAP interface.
-     * @hide
-     */
-    @RequiresPermission(Manifest.permission.MANAGE_TEST_NETWORKS)
-    @NonNull
-    public TestNetworkInterface createTapInterface(boolean disableIpv6ProvisioningDelay,
-            @NonNull LinkAddress[] linkAddrs) {
-        try {
-            return mService.createInterface(TAP, CARRIER_UP, BRING_UP, disableIpv6ProvisioningDelay,
-                    linkAddrs, null /* iface */);
-        } catch (RemoteException e) {
-            throw e.rethrowFromSystemServer();
-        }
-    }
-
-    /**
      * Enable / disable carrier on TestNetworkInterface
      *
      * Note: TUNSETCARRIER is not supported until kernel version 5.0.
@@ -337,4 +259,110 @@
             throw e.rethrowFromSystemServer();
         }
     }
+
+    /**
+     * Represents a request to create a tun/tap interface for testing.
+     *
+     * @hide
+     */
+    public static class TestInterfaceRequest {
+        public final boolean isTun;
+        public final boolean hasCarrier;
+        public final boolean bringUp;
+        public final boolean disableIpv6ProvDelay;
+        @Nullable public final String ifname;
+        public final LinkAddress[] linkAddresses;
+
+        private TestInterfaceRequest(boolean isTun, boolean hasCarrier, boolean bringUp,
+                boolean disableProvDelay, @Nullable String ifname, LinkAddress[] linkAddresses) {
+            this.isTun = isTun;
+            this.hasCarrier = hasCarrier;
+            this.bringUp = bringUp;
+            this.disableIpv6ProvDelay = disableProvDelay;
+            this.ifname = ifname;
+            this.linkAddresses = linkAddresses;
+        }
+
+        /**
+         * Builder class for TestInterfaceRequest
+         *
+         * Defaults to a tap interface with carrier that has been brought up.
+         */
+        public static class Builder {
+            private boolean mIsTun = false;
+            private boolean mHasCarrier = true;
+            private boolean mBringUp = true;
+            private boolean mDisableIpv6ProvDelay = false;
+            @Nullable private String mIfname;
+            private List<LinkAddress> mLinkAddresses = new ArrayList<>();
+
+            /** Create tun interface. */
+            public Builder setTun() {
+                mIsTun = true;
+                return this;
+            }
+
+            /** Create tap interface. */
+            public Builder setTap() {
+                mIsTun = false;
+                return this;
+            }
+
+            /** Configure whether the interface has carrier. */
+            public Builder setHasCarrier(boolean hasCarrier) {
+                mHasCarrier = hasCarrier;
+                return this;
+            }
+
+            /** Configure whether the interface should be brought up. */
+            public Builder setBringUp(boolean bringUp) {
+                mBringUp = bringUp;
+                return this;
+            }
+
+            /** Disable DAD and RS delay. */
+            public Builder setDisableIpv6ProvisioningDelay(boolean disableProvDelay) {
+                mDisableIpv6ProvDelay = disableProvDelay;
+                return this;
+            }
+
+            /** Set the interface name. */
+            public Builder setInterfaceName(@Nullable String ifname) {
+                mIfname = ifname;
+                return this;
+            }
+
+            /** The addresses to configure on the interface. */
+            public Builder addLinkAddress(LinkAddress la) {
+                mLinkAddresses.add(la);
+                return this;
+            }
+
+            /** Build TestInterfaceRequest */
+            public TestInterfaceRequest build() {
+                return new TestInterfaceRequest(mIsTun, mHasCarrier, mBringUp,
+                        mDisableIpv6ProvDelay, mIfname, mLinkAddresses.toArray(new LinkAddress[0]));
+            }
+        }
+    }
+
+    /**
+     * Create a TestNetworkInterface (tun or tap) for testing purposes.
+     *
+     * @param request The request describing the interface to create.
+     * @return A TestNetworkInterface representing the underlying tun/tap interface. Close the
+     *         contained ParcelFileDescriptor to tear down the tun/tap interface.
+     * @hide
+     */
+    @RequiresPermission(Manifest.permission.MANAGE_TEST_NETWORKS)
+    @NonNull
+    public TestNetworkInterface createTestInterface(@NonNull TestInterfaceRequest request) {
+        try {
+            // TODO: Make TestInterfaceRequest parcelable and pass it instead.
+            return mService.createInterface(request.isTun, request.hasCarrier, request.bringUp,
+                    request.disableIpv6ProvDelay, request.linkAddresses, request.ifname);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
 }
diff --git a/framework/src/android/net/connectivity/ConnectivityCompatChanges.java b/framework/src/android/net/connectivity/ConnectivityCompatChanges.java
index 0536263..2261c69 100644
--- a/framework/src/android/net/connectivity/ConnectivityCompatChanges.java
+++ b/framework/src/android/net/connectivity/ConnectivityCompatChanges.java
@@ -100,9 +100,9 @@
     public static final long ENABLE_MATCH_LOCAL_NETWORK = 319212206L;
 
     /**
-     * On Android {@link android.os.Build.VERSION_CODES.VANILLA_ICE_CREAM} or higher releases,
-     * network access from apps targeting Android 36 or higher that do not have the
-     * {@link android.Manifest.permission#INTERNET} permission is considered blocked.
+     * On Android versions starting from 37, network access from apps targeting
+     * Android 37 or higher, that do not have the {@link android.Manifest.permission#INTERNET}
+     * permission, is considered blocked.
      * This results in API behaviors change for apps without
      * {@link android.Manifest.permission#INTERNET} permission.
      * {@link android.net.NetworkInfo} returned from {@link android.net.ConnectivityManager} APIs
@@ -115,10 +115,12 @@
      * network access from apps without {@link android.Manifest.permission#INTERNET} permission is
      * considered not blocked even though apps cannot access any networks.
      *
+     * TODO: b/400903101 - Update the target SDK version once it's finalized.
+     *
      * @hide
      */
     @ChangeId
-    @EnabledAfter(targetSdkVersion = Build.VERSION_CODES.VANILLA_ICE_CREAM)
+    @EnabledAfter(targetSdkVersion = 36)
     public static final long NETWORK_BLOCKED_WITHOUT_INTERNET_PERMISSION = 333340911L;
 
     /**
@@ -143,7 +145,7 @@
      * @hide
      */
     @ChangeId
-    @EnabledSince(targetSdkVersion = Build.VERSION_CODES.CUR_DEVELOPMENT)
+    @EnabledAfter(targetSdkVersion = Build.VERSION_CODES.CUR_DEVELOPMENT)
     public static final long RESTRICT_LOCAL_NETWORK = 365139289L;
 
     private ConnectivityCompatChanges() {
diff --git a/networksecurity/service/Android.bp b/networksecurity/service/Android.bp
index d7aacdb..3c964e5 100644
--- a/networksecurity/service/Android.bp
+++ b/networksecurity/service/Android.bp
@@ -32,6 +32,7 @@
         "framework-connectivity-pre-jarjar",
         "service-connectivity-pre-jarjar",
         "framework-statsd.stubs.module_lib",
+        "ServiceConnectivityResources",
     ],
 
     static_libs: [
diff --git a/networksecurity/service/src/com/android/server/net/ct/CertificateTransparencyJob.java b/networksecurity/service/src/com/android/server/net/ct/CertificateTransparencyJob.java
index e6f1379..f1b9a4f 100644
--- a/networksecurity/service/src/com/android/server/net/ct/CertificateTransparencyJob.java
+++ b/networksecurity/service/src/com/android/server/net/ct/CertificateTransparencyJob.java
@@ -38,6 +38,7 @@
     private final DataStore mDataStore;
     private final CertificateTransparencyDownloader mCertificateTransparencyDownloader;
     private final CompatibilityVersion mCompatVersion;
+    private final SignatureVerifier mSignatureVerifier;
     private final AlarmManager mAlarmManager;
     private final PendingIntent mPendingIntent;
 
@@ -49,11 +50,13 @@
             Context context,
             DataStore dataStore,
             CertificateTransparencyDownloader certificateTransparencyDownloader,
-            CompatibilityVersion compatVersion) {
+            CompatibilityVersion compatVersion,
+            SignatureVerifier signatureVerifier) {
         mContext = context;
         mDataStore = dataStore;
         mCertificateTransparencyDownloader = certificateTransparencyDownloader;
         mCompatVersion = compatVersion;
+        mSignatureVerifier = signatureVerifier;
 
         mAlarmManager = context.getSystemService(AlarmManager.class);
         mPendingIntent =
@@ -127,6 +130,7 @@
     private void startDependencies() {
         mDataStore.load();
         mCertificateTransparencyDownloader.addCompatibilityVersion(mCompatVersion);
+        mSignatureVerifier.loadAllowedKeys();
         mContext.registerReceiver(
                 mCertificateTransparencyDownloader,
                 new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE),
@@ -139,6 +143,7 @@
 
     private void stopDependencies() {
         mContext.unregisterReceiver(mCertificateTransparencyDownloader);
+        mSignatureVerifier.clearAllowedKeys();
         mCertificateTransparencyDownloader.clearCompatibilityVersions();
         mDataStore.delete();
 
diff --git a/networksecurity/service/src/com/android/server/net/ct/CertificateTransparencyService.java b/networksecurity/service/src/com/android/server/net/ct/CertificateTransparencyService.java
index a71ff7c..2e910b2 100644
--- a/networksecurity/service/src/com/android/server/net/ct/CertificateTransparencyService.java
+++ b/networksecurity/service/src/com/android/server/net/ct/CertificateTransparencyService.java
@@ -52,6 +52,7 @@
     public CertificateTransparencyService(Context context) {
         DataStore dataStore = new DataStore(Config.PREFERENCES_FILE);
 
+        SignatureVerifier signatureVerifier = new SignatureVerifier(context);
         mCertificateTransparencyJob =
                 new CertificateTransparencyJob(
                         context,
@@ -60,13 +61,14 @@
                                 context,
                                 dataStore,
                                 new DownloadHelper(context),
-                                new SignatureVerifier(context),
+                                signatureVerifier,
                                 new CertificateTransparencyLoggerImpl(dataStore)),
                         new CompatibilityVersion(
                                 Config.COMPATIBILITY_VERSION,
                                 Config.URL_SIGNATURE,
                                 Config.URL_LOG_LIST,
-                                Config.CT_ROOT_DIRECTORY_PATH));
+                                Config.CT_ROOT_DIRECTORY_PATH),
+                        signatureVerifier);
     }
 
     /**
diff --git a/networksecurity/service/src/com/android/server/net/ct/DataStore.java b/networksecurity/service/src/com/android/server/net/ct/DataStore.java
index 8180316..1f99efa 100644
--- a/networksecurity/service/src/com/android/server/net/ct/DataStore.java
+++ b/networksecurity/service/src/com/android/server/net/ct/DataStore.java
@@ -44,8 +44,9 @@
         }
         try (InputStream in = new FileInputStream(mPropertyFile)) {
             load(in);
-        } catch (IOException e) {
+        } catch (IOException | IllegalArgumentException e) {
             Log.e(TAG, "Error loading property store", e);
+            delete();
         }
     }
 
diff --git a/networksecurity/service/src/com/android/server/net/ct/PemReader.java b/networksecurity/service/src/com/android/server/net/ct/PemReader.java
new file mode 100644
index 0000000..56b3973
--- /dev/null
+++ b/networksecurity/service/src/com/android/server/net/ct/PemReader.java
@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) 2025 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.server.net.ct;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.security.GeneralSecurityException;
+import java.security.KeyFactory;
+import java.security.PublicKey;
+import java.security.spec.KeySpec;
+import java.security.spec.X509EncodedKeySpec;
+import java.util.ArrayList;
+import java.util.Base64;
+import java.util.Collection;
+
+/** Utility class to read keys in PEM format. */
+class PemReader {
+
+    private static final String BEGIN = "-----BEGIN";
+    private static final String END = "-----END";
+
+    /**
+     * Parse the provided input stream and return the list of keys from the stream.
+     *
+     * @param input the input stream
+     * @return the keys
+     */
+    public static Collection<PublicKey> readKeysFrom(InputStream input)
+            throws IOException, GeneralSecurityException {
+        KeyFactory instance = KeyFactory.getInstance("RSA");
+        Collection<PublicKey> keys = new ArrayList<>();
+
+        try (BufferedReader reader = new BufferedReader(new InputStreamReader(input))) {
+            String line = reader.readLine();
+            while (line != null) {
+                if (line.startsWith(BEGIN)) {
+                    keys.add(instance.generatePublic(readNextKey(reader)));
+                } else {
+                    throw new IOException("Unexpected line in the reader: " + line);
+                }
+                line = reader.readLine();
+            }
+        } catch (IllegalArgumentException e) {
+            throw new GeneralSecurityException("Invalid public key base64 encoding", e);
+        }
+
+        return keys;
+    }
+
+    private static KeySpec readNextKey(BufferedReader reader) throws IOException {
+        StringBuilder publicKeyBuilder = new StringBuilder();
+
+        String line = reader.readLine();
+        while (line != null) {
+            if (line.startsWith(END)) {
+                return new X509EncodedKeySpec(
+                        Base64.getDecoder().decode(publicKeyBuilder.toString()));
+            } else {
+                publicKeyBuilder.append(line);
+            }
+            line = reader.readLine();
+        }
+
+        throw new IOException("Unexpected end of the reader");
+    }
+}
diff --git a/networksecurity/service/src/com/android/server/net/ct/SignatureVerifier.java b/networksecurity/service/src/com/android/server/net/ct/SignatureVerifier.java
index 6040ef6..87a4973 100644
--- a/networksecurity/service/src/com/android/server/net/ct/SignatureVerifier.java
+++ b/networksecurity/service/src/com/android/server/net/ct/SignatureVerifier.java
@@ -30,6 +30,9 @@
 
 import androidx.annotation.VisibleForTesting;
 
+import com.android.connectivity.resources.R;
+import com.android.server.connectivity.ConnectivityResources;
+
 import java.io.IOException;
 import java.io.InputStream;
 import java.security.GeneralSecurityException;
@@ -39,21 +42,39 @@
 import java.security.Signature;
 import java.security.spec.X509EncodedKeySpec;
 import java.util.Base64;
+import java.util.HashSet;
 import java.util.Optional;
+import java.util.Set;
 
 /** Verifier of the log list signature. */
 @RequiresApi(Build.VERSION_CODES.VANILLA_ICE_CREAM)
 public class SignatureVerifier {
 
-    private final Context mContext;
     private static final String TAG = "SignatureVerifier";
 
+    private final Context mContext;
+
     @NonNull private Optional<PublicKey> mPublicKey = Optional.empty();
 
+    private final Set<PublicKey> mAllowedKeys = new HashSet<>();
+
     public SignatureVerifier(Context context) {
         mContext = context;
     }
 
+    void loadAllowedKeys() {
+        try (InputStream input =
+                new ConnectivityResources(mContext).get().openRawResource(R.raw.ct_public_keys)) {
+            mAllowedKeys.addAll(PemReader.readKeysFrom(input));
+        } catch (GeneralSecurityException | IOException e) {
+            Log.e(TAG, "Error loading public keys", e);
+        }
+    }
+
+    void clearAllowedKeys() {
+        mAllowedKeys.clear();
+    }
+
     @VisibleForTesting
     Optional<PublicKey> getPublicKey() {
         return mPublicKey;
@@ -82,7 +103,11 @@
     }
 
     @VisibleForTesting
-    void setPublicKey(PublicKey publicKey) {
+    void setPublicKey(PublicKey publicKey) throws GeneralSecurityException {
+        if (!mAllowedKeys.contains(publicKey)) {
+            // TODO(b/400704086): add logging for this failure.
+            throw new GeneralSecurityException("Public key not in allowlist");
+        }
         mPublicKey = Optional.of(publicKey);
     }
 
@@ -105,21 +130,18 @@
 
             byte[] signatureBytes = signatureStream.readAllBytes();
             statusBuilder.setSignature(new String(signatureBytes));
-            try {
-                byte[] decodedSigBytes = Base64.getDecoder().decode(signatureBytes);
 
-                if (!verifier.verify(decodedSigBytes)) {
-                    // Leave the UpdateState as UNKNOWN_STATE if successful as there are other
-                    // potential failures past the signature verification step
-                    statusBuilder.setState(SIGNATURE_VERIFICATION_FAILED);
-                }
-            } catch (IllegalArgumentException e) {
-                Log.w(TAG, "Invalid signature base64 encoding", e);
-                statusBuilder.setState(SIGNATURE_INVALID);
-                return statusBuilder.build();
+            if (!verifier.verify(Base64.getDecoder().decode(signatureBytes))) {
+                // Leave the UpdateState as UNKNOWN_STATE if successful as there are other
+                // potential failures past the signature verification step
+                statusBuilder.setState(SIGNATURE_VERIFICATION_FAILED);
             }
+        } catch (IllegalArgumentException e) {
+            Log.w(TAG, "Invalid signature base64 encoding", e);
+            statusBuilder.setState(SIGNATURE_INVALID);
+            return statusBuilder.build();
         } catch (InvalidKeyException e) {
-            Log.e(TAG, "Signature invalid for log list verification", e);
+            Log.e(TAG, "Key invalid for log list verification", e);
             statusBuilder.setState(SIGNATURE_INVALID);
             return statusBuilder.build();
         } catch (IOException | GeneralSecurityException e) {
@@ -135,4 +157,9 @@
 
         return statusBuilder.build();
     }
+
+    @VisibleForTesting
+    boolean addAllowedKey(PublicKey publicKey) {
+        return mAllowedKeys.add(publicKey);
+    }
 }
diff --git a/networksecurity/tests/unit/src/com/android/server/net/ct/CertificateTransparencyDownloaderTest.java b/networksecurity/tests/unit/src/com/android/server/net/ct/CertificateTransparencyDownloaderTest.java
index 2af0122..22dc6ab 100644
--- a/networksecurity/tests/unit/src/com/android/server/net/ct/CertificateTransparencyDownloaderTest.java
+++ b/networksecurity/tests/unit/src/com/android/server/net/ct/CertificateTransparencyDownloaderTest.java
@@ -109,6 +109,7 @@
                         mContext.getFilesDir());
 
         prepareDownloadManager();
+        mSignatureVerifier.addAllowedKey(mPublicKey);
         mDataStore.load();
         mCertificateTransparencyDownloader.addCompatibilityVersion(mCompatVersion);
     }
@@ -165,6 +166,22 @@
 
     @Test
     public void
+            testDownloader_publicKeyDownloadSuccess_publicKeyNotAllowed_doNotStartMetadataDownload()
+                    throws Exception {
+        mCertificateTransparencyDownloader.startPublicKeyDownload();
+        PublicKey notAllowed = KeyPairGenerator.getInstance("RSA").generateKeyPair().getPublic();
+
+        assertThat(mSignatureVerifier.getPublicKey()).isEmpty();
+        assertThat(mCertificateTransparencyDownloader.hasMetadataDownloadId()).isFalse();
+        mCertificateTransparencyDownloader.onReceive(
+                mContext, makePublicKeyDownloadCompleteIntent(writePublicKeyToFile(notAllowed)));
+
+        assertThat(mSignatureVerifier.getPublicKey()).isEmpty();
+        assertThat(mCertificateTransparencyDownloader.hasMetadataDownloadId()).isFalse();
+    }
+
+    @Test
+    public void
             testDownloader_publicKeyDownloadSuccess_updatePublicKeyFail_doNotStartMetadataDownload()
                     throws Exception {
         mCertificateTransparencyDownloader.startPublicKeyDownload();
@@ -197,8 +214,7 @@
     }
 
     @Test
-    public void testDownloader_publicKeyDownloadFail_logsFailure()
-            throws Exception {
+    public void testDownloader_publicKeyDownloadFail_logsFailure() throws Exception {
         mCertificateTransparencyDownloader.startPublicKeyDownload();
 
         mCertificateTransparencyDownloader.onReceive(
@@ -243,8 +259,7 @@
     }
 
     @Test
-    public void testDownloader_metadataDownloadFail_logsFailure()
-            throws Exception {
+    public void testDownloader_metadataDownloadFail_logsFailure() throws Exception {
         mCertificateTransparencyDownloader.startMetadataDownload();
 
         mCertificateTransparencyDownloader.onReceive(
@@ -294,8 +309,7 @@
     }
 
     @Test
-    public void testDownloader_contentDownloadFail_logsFailure()
-            throws Exception {
+    public void testDownloader_contentDownloadFail_logsFailure() throws Exception {
         mCertificateTransparencyDownloader.startContentDownload(mCompatVersion);
 
         mCertificateTransparencyDownloader.onReceive(
@@ -329,9 +343,8 @@
     }
 
     @Test
-    public void
-            testDownloader_contentDownloadSuccess_noPublicKeyFound_logsSingleFailure()
-                    throws Exception {
+    public void testDownloader_contentDownloadSuccess_noPublicKeyFound_logsSingleFailure()
+            throws Exception {
         File logListFile = makeLogListFile("456");
         File metadataFile = sign(logListFile);
         mSignatureVerifier.setPublicKey(mPublicKey);
@@ -351,16 +364,17 @@
     }
 
     @Test
-    public void
-            testDownloader_contentDownloadSuccess_wrongSignatureAlgo_logsSingleFailure()
-                    throws Exception {
+    public void testDownloader_contentDownloadSuccess_wrongSignatureAlgo_logsSingleFailure()
+            throws Exception {
         // Arrange
         File logListFile = makeLogListFile("456");
         File metadataFile = sign(logListFile);
 
         // Set the key to be deliberately wrong by using diff algorithm
-        KeyPairGenerator instance = KeyPairGenerator.getInstance("EC");
-        mSignatureVerifier.setPublicKey(instance.generateKeyPair().getPublic());
+        PublicKey wrongAlgorithmKey =
+                KeyPairGenerator.getInstance("EC").generateKeyPair().getPublic();
+        mSignatureVerifier.addAllowedKey(wrongAlgorithmKey);
+        mSignatureVerifier.setPublicKey(wrongAlgorithmKey);
 
         // Act
         mCertificateTransparencyDownloader.startMetadataDownload();
@@ -377,16 +391,15 @@
     }
 
     @Test
-    public void
-            testDownloader_contentDownloadSuccess_signatureNotVerified_logsSingleFailure()
-                    throws Exception {
+    public void testDownloader_contentDownloadSuccess_signatureNotVerified_logsSingleFailure()
+            throws Exception {
         // Arrange
         File logListFile = makeLogListFile("456");
-        File metadataFile = sign(logListFile);
+        mSignatureVerifier.setPublicKey(mPublicKey);
 
-        // Set the key to be deliberately wrong by using diff key pair
+        // Sign the list with a disallowed key pair
         KeyPairGenerator instance = KeyPairGenerator.getInstance("RSA");
-        mSignatureVerifier.setPublicKey(instance.generateKeyPair().getPublic());
+        File metadataFile = sign(logListFile, instance.generateKeyPair().getPrivate());
 
         // Act
         mCertificateTransparencyDownloader.startMetadataDownload();
@@ -405,9 +418,7 @@
     }
 
     @Test
-    public void
-            testDownloader_contentDownloadSuccess_installFail_logsFailure()
-                    throws Exception {
+    public void testDownloader_contentDownloadSuccess_installFail_logsFailure() throws Exception {
         File invalidLogListFile = writeToFile("not_a_json_log_list".getBytes());
         File metadataFile = sign(invalidLogListFile);
         mSignatureVerifier.setPublicKey(mPublicKey);
@@ -615,9 +626,14 @@
     }
 
     private File sign(File file) throws IOException, GeneralSecurityException {
+        return sign(file, mPrivateKey);
+    }
+
+    private File sign(File file, PrivateKey privateKey)
+            throws IOException, GeneralSecurityException {
         File signatureFile = File.createTempFile("log_list-metadata", "sig");
         Signature signer = Signature.getInstance("SHA256withRSA");
-        signer.initSign(mPrivateKey);
+        signer.initSign(privateKey);
 
         try (InputStream fileStream = new FileInputStream(file);
                 OutputStream outputStream = new FileOutputStream(signatureFile)) {
diff --git a/networksecurity/tests/unit/src/com/android/server/net/ct/PemReaderTest.java b/networksecurity/tests/unit/src/com/android/server/net/ct/PemReaderTest.java
new file mode 100644
index 0000000..08629db
--- /dev/null
+++ b/networksecurity/tests/unit/src/com/android/server/net/ct/PemReaderTest.java
@@ -0,0 +1,111 @@
+/*
+ * Copyright (C) 2025 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.server.net.ct;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.junit.Assert.assertThrows;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.security.GeneralSecurityException;
+import java.security.KeyPairGenerator;
+import java.security.PublicKey;
+import java.util.Base64;
+
+/** Tests for the {@link PemReader}. */
+@RunWith(JUnit4.class)
+public class PemReaderTest {
+
+    @Test
+    public void testReadKeys_singleKey() throws GeneralSecurityException, IOException {
+        PublicKey key = KeyPairGenerator.getInstance("RSA").generateKeyPair().getPublic();
+
+        assertThat(PemReader.readKeysFrom(toInputStream(key))).containsExactly(key);
+    }
+
+    @Test
+    public void testReadKeys_multipleKeys() throws GeneralSecurityException, IOException {
+        KeyPairGenerator instance = KeyPairGenerator.getInstance("RSA");
+        PublicKey key1 = instance.generateKeyPair().getPublic();
+        PublicKey key2 = instance.generateKeyPair().getPublic();
+
+        assertThat(PemReader.readKeysFrom(toInputStream(key1, key2))).containsExactly(key1, key2);
+    }
+
+    @Test
+    public void testReadKeys_notSupportedKeyType() throws GeneralSecurityException {
+        PublicKey key = KeyPairGenerator.getInstance("EC").generateKeyPair().getPublic();
+
+        assertThrows(
+                GeneralSecurityException.class, () -> PemReader.readKeysFrom(toInputStream(key)));
+    }
+
+    @Test
+    public void testReadKeys_notBase64EncodedKey() throws GeneralSecurityException {
+        InputStream inputStream =
+                new ByteArrayInputStream(
+                        (""
+                                        + "-----BEGIN PUBLIC KEY-----\n"
+                                        + KeyPairGenerator.getInstance("RSA")
+                                                .generateKeyPair()
+                                                .getPublic()
+                                                .toString()
+                                        + "\n-----END PUBLIC KEY-----\n")
+                                .getBytes());
+
+        assertThrows(GeneralSecurityException.class, () -> PemReader.readKeysFrom(inputStream));
+    }
+
+    @Test
+    public void testReadKeys_noPemBegin() throws GeneralSecurityException {
+        PublicKey key = KeyPairGenerator.getInstance("RSA").generateKeyPair().getPublic();
+        String base64Key = Base64.getEncoder().encodeToString(key.getEncoded());
+        String pemNoBegin = base64Key + "\n-----END PUBLIC KEY-----\n";
+
+        assertThrows(
+                IOException.class,
+                () -> PemReader.readKeysFrom(new ByteArrayInputStream(pemNoBegin.getBytes())));
+    }
+
+    @Test
+    public void testReadKeys_noPemEnd() throws GeneralSecurityException {
+        PublicKey key = KeyPairGenerator.getInstance("RSA").generateKeyPair().getPublic();
+        String base64Key = Base64.getEncoder().encodeToString(key.getEncoded());
+        String pemNoEnd = "-----BEGIN PUBLIC KEY-----\n" + base64Key;
+
+        assertThrows(
+                IOException.class,
+                () -> PemReader.readKeysFrom(new ByteArrayInputStream(pemNoEnd.getBytes())));
+    }
+
+    private InputStream toInputStream(PublicKey... keys) {
+        StringBuilder builder = new StringBuilder();
+
+        for (PublicKey key : keys) {
+            builder.append("-----BEGIN PUBLIC KEY-----\n")
+                    .append(Base64.getEncoder().encodeToString(key.getEncoded()))
+                    .append("\n-----END PUBLIC KEY-----\n");
+        }
+
+        return new ByteArrayInputStream(builder.toString().getBytes());
+    }
+}
diff --git a/service-t/Android.bp b/service-t/Android.bp
index d2e2a80..ab38c7a 100644
--- a/service-t/Android.bp
+++ b/service-t/Android.bp
@@ -29,6 +29,7 @@
     name: "service-connectivity-tiramisu-sources",
     srcs: [
         "src/**/*.java",
+        ":vcn-location-sources",
     ],
     visibility: ["//visibility:private"],
 }
diff --git a/service-t/src/com/android/server/ConnectivityServiceInitializer.java b/service-t/src/com/android/server/ConnectivityServiceInitializer.java
index 5d23fdc..5ef1aef 100644
--- a/service-t/src/com/android/server/ConnectivityServiceInitializer.java
+++ b/service-t/src/com/android/server/ConnectivityServiceInitializer.java
@@ -30,6 +30,9 @@
 import com.android.server.nearby.NearbyService;
 import com.android.server.net.ct.CertificateTransparencyService;
 import com.android.server.thread.ThreadNetworkService;
+import com.android.server.vcn.VcnLocation;
+
+import java.lang.reflect.Constructor;
 
 /**
  * Connectivity service initializer for core networking. This is called by system server to create
@@ -37,6 +40,9 @@
  */
 public final class ConnectivityServiceInitializer extends SystemService {
     private static final String TAG = ConnectivityServiceInitializer.class.getSimpleName();
+    private static final String CONNECTIVITY_SERVICE_INITIALIZER_B_CLASS =
+            "com.android.server.ConnectivityServiceInitializerB";
+
     private final ConnectivityNativeService mConnectivityNative;
     private final ConnectivityService mConnectivity;
     private final IpSecService mIpSecService;
@@ -45,6 +51,7 @@
     private final EthernetServiceImpl mEthernetServiceImpl;
     private final ThreadNetworkService mThreadNetworkService;
     private final CertificateTransparencyService mCertificateTransparencyService;
+    private final SystemService mConnectivityServiceInitializerB;
 
     public ConnectivityServiceInitializer(Context context) {
         super(context);
@@ -58,6 +65,7 @@
         mNearbyService = createNearbyService(context);
         mThreadNetworkService = createThreadNetworkService(context);
         mCertificateTransparencyService = createCertificateTransparencyService(context);
+        mConnectivityServiceInitializerB = createConnectivityServiceInitializerB(context);
     }
 
     @Override
@@ -99,6 +107,11 @@
             publishBinderService(ThreadNetworkManager.SERVICE_NAME, mThreadNetworkService,
                     /* allowIsolated= */ false);
         }
+
+        if (mConnectivityServiceInitializerB != null) {
+            Log.i(TAG, "ConnectivityServiceInitializerB#onStart");
+            mConnectivityServiceInitializerB.onStart();
+        }
     }
 
     @Override
@@ -118,6 +131,10 @@
         if (SdkLevel.isAtLeastV() && mCertificateTransparencyService != null) {
             mCertificateTransparencyService.onBootPhase(phase);
         }
+
+        if (mConnectivityServiceInitializerB != null) {
+            mConnectivityServiceInitializerB.onBootPhase(phase);
+        }
     }
 
     /**
@@ -202,4 +219,28 @@
                 ? new CertificateTransparencyService(context)
                 : null;
     }
+
+    // TODO: b/374174952 After VCN code is moved to the Connectivity folder, merge
+    // ConnectivityServiceInitializerB into ConnectivityServiceInitializer and directly create and
+    // register VcnManagementService in ConnectivityServiceInitializer
+    /** Return ConnectivityServiceInitializerB instance if enable, otherwise null. */
+    @Nullable
+    private SystemService createConnectivityServiceInitializerB(Context context) {
+        if (!VcnLocation.IS_VCN_IN_MAINLINE || !SdkLevel.isAtLeastB()) {
+            return null;
+        }
+
+        try {
+            final Class<?> connectivityServiceInitializerBClass =
+                    Class.forName(CONNECTIVITY_SERVICE_INITIALIZER_B_CLASS);
+            final Constructor constructor =
+                    connectivityServiceInitializerBClass.getConstructor(Context.class);
+
+            return (SystemService) constructor.newInstance(context);
+        } catch (Exception e) {
+            Log.e(TAG, "Fail to load ConnectivityServiceInitializerB " + e);
+        }
+
+        return null;
+    }
 }
diff --git a/service-t/src/com/android/server/connectivity/mdns/DiscoveryExecutor.java b/service-t/src/com/android/server/connectivity/mdns/DiscoveryExecutor.java
new file mode 100644
index 0000000..21af1a1
--- /dev/null
+++ b/service-t/src/com/android/server/connectivity/mdns/DiscoveryExecutor.java
@@ -0,0 +1,140 @@
+/*
+ * Copyright (C) 2024 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.server.connectivity.mdns;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.os.Handler;
+import android.os.HandlerThread;
+import android.os.Looper;
+import android.util.Log;
+import android.util.Pair;
+
+import androidx.annotation.GuardedBy;
+
+import com.android.net.module.util.HandlerUtils;
+
+import java.util.ArrayList;
+import java.util.concurrent.Executor;
+
+/**
+ * A utility class to generate a handler, optionally with a looper, and to run functions on the
+ * newly created handler.
+ */
+public class DiscoveryExecutor implements Executor {
+    private static final String TAG = DiscoveryExecutor.class.getSimpleName();
+    @Nullable
+    private final HandlerThread mHandlerThread;
+
+    @GuardedBy("mPendingTasks")
+    @Nullable
+    private Handler mHandler;
+    // Store pending tasks and associated delay time. Each Pair represents a pending task
+    // (first) and its delay time (second).
+    @GuardedBy("mPendingTasks")
+    @NonNull
+    private final ArrayList<Pair<Runnable, Long>> mPendingTasks = new ArrayList<>();
+
+    DiscoveryExecutor(@Nullable Looper defaultLooper) {
+        if (defaultLooper != null) {
+            this.mHandlerThread = null;
+            synchronized (mPendingTasks) {
+                this.mHandler = new Handler(defaultLooper);
+            }
+        } else {
+            this.mHandlerThread = new HandlerThread(MdnsDiscoveryManager.class.getSimpleName()) {
+                @Override
+                protected void onLooperPrepared() {
+                    synchronized (mPendingTasks) {
+                        mHandler = new Handler(getLooper());
+                        for (Pair<Runnable, Long> pendingTask : mPendingTasks) {
+                            mHandler.postDelayed(pendingTask.first, pendingTask.second);
+                        }
+                        mPendingTasks.clear();
+                    }
+                }
+            };
+            this.mHandlerThread.start();
+        }
+    }
+
+    /**
+     * Check if the current thread is the expected thread. If it is, run the given function.
+     * Otherwise, execute it using the handler.
+     */
+    public void checkAndRunOnHandlerThread(@NonNull Runnable function) {
+        if (this.mHandlerThread == null) {
+            // Callers are expected to already be running on the handler when a defaultLooper
+            // was provided
+            function.run();
+        } else {
+            execute(function);
+        }
+    }
+
+    /** Execute the given function */
+    @Override
+    public void execute(Runnable function) {
+        executeDelayed(function, 0L /* delayMillis */);
+    }
+
+    /** Execute the given function after the specified amount of time elapses. */
+    public void executeDelayed(Runnable function, long delayMillis) {
+        final Handler handler;
+        synchronized (mPendingTasks) {
+            if (this.mHandler == null) {
+                mPendingTasks.add(Pair.create(function, delayMillis));
+                return;
+            } else {
+                handler = this.mHandler;
+            }
+        }
+        handler.postDelayed(function, delayMillis);
+    }
+
+    /** Shutdown the thread if necessary. */
+    public void shutDown() {
+        if (this.mHandlerThread != null) {
+            this.mHandlerThread.quitSafely();
+        }
+    }
+
+    /**
+     * Ensures that the current running thread is the same as the handler thread.
+     */
+    public void ensureRunningOnHandlerThread() {
+        synchronized (mPendingTasks) {
+            HandlerUtils.ensureRunningOnHandlerThread(mHandler);
+        }
+    }
+
+    /**
+     * Runs the specified task synchronously for dump method.
+     */
+    public void runWithScissorsForDumpIfReady(@NonNull Runnable function) {
+        final Handler handler;
+        synchronized (mPendingTasks) {
+            if (this.mHandler == null) {
+                Log.d(TAG, "The handler is not ready. Ignore the DiscoveryManager dump");
+                return;
+            } else {
+                handler = this.mHandler;
+            }
+        }
+        HandlerUtils.runWithScissorsForDump(handler, function, 10_000);
+    }
+}
diff --git a/service-t/src/com/android/server/connectivity/mdns/MdnsAdvertiser.java b/service-t/src/com/android/server/connectivity/mdns/MdnsAdvertiser.java
index 54f7ca3..bd00b70 100644
--- a/service-t/src/com/android/server/connectivity/mdns/MdnsAdvertiser.java
+++ b/service-t/src/com/android/server/connectivity/mdns/MdnsAdvertiser.java
@@ -35,6 +35,7 @@
 import android.os.Looper;
 import android.text.TextUtils;
 import android.util.ArrayMap;
+import android.util.ArraySet;
 import android.util.Log;
 import android.util.SparseArray;
 
@@ -93,6 +94,7 @@
             new ArrayMap<>();
     private final MdnsFeatureFlags mMdnsFeatureFlags;
     private final Map<String, Integer> mServiceTypeToOffloadPriority;
+    private final ArraySet<String> mOffloadServiceTypeDenyList;
 
     /**
      * Dependencies for {@link MdnsAdvertiser}, useful for testing.
@@ -160,6 +162,16 @@
         return mInterfaceOffloadServices.getOrDefault(interfaceName, Collections.emptyList());
     }
 
+    private boolean isInOffloadDenyList(@NonNull String serviceType) {
+        for (int i = 0; i < mOffloadServiceTypeDenyList.size(); ++i) {
+            final String denyListServiceType = mOffloadServiceTypeDenyList.valueAt(i);
+            if (DnsUtils.equalsIgnoreDnsCase(serviceType, denyListServiceType)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
     private final MdnsInterfaceAdvertiser.Callback mInterfaceAdvertiserCb =
             new MdnsInterfaceAdvertiser.Callback() {
         @Override
@@ -173,19 +185,25 @@
             if (mMdnsFeatureFlags.mIsMdnsOffloadFeatureEnabled
                     // TODO: Enable offload when the serviceInfo contains a custom host.
                     && TextUtils.isEmpty(registration.getServiceInfo().getHostname())) {
-                final String interfaceName = advertiser.getSocketInterfaceName();
-                final List<OffloadServiceInfoWrapper> existingOffloadServiceInfoWrappers =
-                        mInterfaceOffloadServices.computeIfAbsent(interfaceName,
-                                k -> new ArrayList<>());
-                // Remove existing offload services from cache for update.
-                existingOffloadServiceInfoWrappers.removeIf(item -> item.mServiceId == serviceId);
+                final String serviceType = registration.getServiceInfo().getServiceType();
+                if (isInOffloadDenyList(serviceType)) {
+                    mSharedLog.i("Offload denied for service type: " + serviceType);
+                } else {
+                    final String interfaceName = advertiser.getSocketInterfaceName();
+                    final List<OffloadServiceInfoWrapper> existingOffloadServiceInfoWrappers =
+                            mInterfaceOffloadServices.computeIfAbsent(interfaceName,
+                                    k -> new ArrayList<>());
+                    // Remove existing offload services from cache for update.
+                    existingOffloadServiceInfoWrappers.removeIf(
+                            item -> item.mServiceId == serviceId);
 
-                byte[] rawOffloadPacket = advertiser.getRawOffloadPayload(serviceId);
-                final OffloadServiceInfoWrapper newOffloadServiceInfoWrapper = createOffloadService(
-                        serviceId, registration, rawOffloadPacket);
-                existingOffloadServiceInfoWrappers.add(newOffloadServiceInfoWrapper);
-                mCb.onOffloadStartOrUpdate(interfaceName,
-                        newOffloadServiceInfoWrapper.mOffloadServiceInfo);
+                    byte[] rawOffloadPacket = advertiser.getRawOffloadPayload(serviceId);
+                    final OffloadServiceInfoWrapper newOffloadServiceInfoWrapper =
+                            createOffloadService(serviceId, registration, rawOffloadPacket);
+                    existingOffloadServiceInfoWrappers.add(newOffloadServiceInfoWrapper);
+                    mCb.onOffloadStartOrUpdate(interfaceName,
+                            newOffloadServiceInfoWrapper.mOffloadServiceInfo);
+                }
             }
 
             // Wait for all current interfaces to be done probing before notifying of success.
@@ -846,6 +864,8 @@
         final ConnectivityResources res = new ConnectivityResources(context);
         mServiceTypeToOffloadPriority = parseOffloadPriorityList(
                 res.get().getStringArray(R.array.config_nsdOffloadServicesPriority), sharedLog);
+        mOffloadServiceTypeDenyList = new ArraySet<>(
+                res.get().getStringArray(R.array.config_nsdOffloadServicesDenyList));
     }
 
     private static Map<String, Integer> parseOffloadPriorityList(
@@ -1007,6 +1027,19 @@
         });
     }
 
+    private List<String> getOffloadSubtype(@NonNull NsdServiceInfo nsdServiceInfo) {
+        // Workaround: Google Cast doesn't announce subtypes per DNS-SD/mDNS spec.
+        // Thus, subtypes aren't offloaded; only "_googlecast._tcp" is.
+        // Subtype responses occur when hardware offload is off.
+        // This solution works because Google Cast doesn't follow the intended usage of subtypes in
+        // the spec, as it always discovers for both the subtype+base type, and only uses the mDNS
+        // subtype as an optimization.
+        if (nsdServiceInfo.getServiceType().equals("_googlecast._tcp")) {
+            return new ArrayList<>();
+        }
+        return new ArrayList<>(nsdServiceInfo.getSubtypes());
+    }
+
     private OffloadServiceInfoWrapper createOffloadService(int serviceId,
             @NonNull Registration registration, byte[] rawOffloadPacket) {
         final NsdServiceInfo nsdServiceInfo = registration.getServiceInfo();
@@ -1017,7 +1050,7 @@
         final OffloadServiceInfo offloadServiceInfo = new OffloadServiceInfo(
                 new OffloadServiceInfo.Key(nsdServiceInfo.getServiceName(),
                         nsdServiceInfo.getServiceType()),
-                new ArrayList<>(nsdServiceInfo.getSubtypes()),
+                getOffloadSubtype(nsdServiceInfo),
                 String.join(".", mDeviceHostName),
                 rawOffloadPacket,
                 priority,
diff --git a/service-t/src/com/android/server/connectivity/mdns/MdnsDiscoveryManager.java b/service-t/src/com/android/server/connectivity/mdns/MdnsDiscoveryManager.java
index c833422..33bcb70 100644
--- a/service-t/src/com/android/server/connectivity/mdns/MdnsDiscoveryManager.java
+++ b/service-t/src/com/android/server/connectivity/mdns/MdnsDiscoveryManager.java
@@ -16,24 +16,17 @@
 
 package com.android.server.connectivity.mdns;
 
-import static com.android.internal.annotations.VisibleForTesting.Visibility;
-
 import android.Manifest.permission;
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.annotation.RequiresPermission;
-import android.os.Handler;
-import android.os.HandlerThread;
 import android.os.Looper;
 import android.util.ArrayMap;
 import android.util.Log;
 import android.util.Pair;
 
-import androidx.annotation.GuardedBy;
-
 import com.android.internal.annotations.VisibleForTesting;
 import com.android.net.module.util.DnsUtils;
-import com.android.net.module.util.HandlerUtils;
 import com.android.net.module.util.SharedLog;
 
 import java.io.IOException;
@@ -41,7 +34,6 @@
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Objects;
-import java.util.concurrent.Executor;
 
 /**
  * This class keeps tracking the set of registered {@link MdnsServiceBrowserListener} instances, and
@@ -137,98 +129,6 @@
     }
 
     /**
-     * A utility class to generate a handler, optionally with a looper, and to run functions on the
-     * newly created handler.
-     */
-    @VisibleForTesting(visibility = Visibility.PRIVATE)
-    static class DiscoveryExecutor implements Executor {
-        private final HandlerThread handlerThread;
-
-        @GuardedBy("pendingTasks")
-        @Nullable private Handler handler;
-        // Store pending tasks and associated delay time. Each Pair represents a pending task
-        // (first) and its delay time (second).
-        @GuardedBy("pendingTasks")
-        @NonNull private final ArrayList<Pair<Runnable, Long>> pendingTasks = new ArrayList<>();
-
-        DiscoveryExecutor(@Nullable Looper defaultLooper) {
-            if (defaultLooper != null) {
-                this.handlerThread = null;
-                synchronized (pendingTasks) {
-                    this.handler = new Handler(defaultLooper);
-                }
-            } else {
-                this.handlerThread = new HandlerThread(MdnsDiscoveryManager.class.getSimpleName()) {
-                    @Override
-                    protected void onLooperPrepared() {
-                        synchronized (pendingTasks) {
-                            handler = new Handler(getLooper());
-                            for (Pair<Runnable, Long> pendingTask : pendingTasks) {
-                                handler.postDelayed(pendingTask.first, pendingTask.second);
-                            }
-                            pendingTasks.clear();
-                        }
-                    }
-                };
-                this.handlerThread.start();
-            }
-        }
-
-        public void checkAndRunOnHandlerThread(@NonNull Runnable function) {
-            if (this.handlerThread == null) {
-                // Callers are expected to already be running on the handler when a defaultLooper
-                // was provided
-                function.run();
-            } else {
-                execute(function);
-            }
-        }
-
-        @Override
-        public void execute(Runnable function) {
-            executeDelayed(function, 0L /* delayMillis */);
-        }
-
-        public void executeDelayed(Runnable function, long delayMillis) {
-            final Handler handler;
-            synchronized (pendingTasks) {
-                if (this.handler == null) {
-                    pendingTasks.add(Pair.create(function, delayMillis));
-                    return;
-                } else {
-                    handler = this.handler;
-                }
-            }
-            handler.postDelayed(function, delayMillis);
-        }
-
-        void shutDown() {
-            if (this.handlerThread != null) {
-                this.handlerThread.quitSafely();
-            }
-        }
-
-        void ensureRunningOnHandlerThread() {
-            synchronized (pendingTasks) {
-                HandlerUtils.ensureRunningOnHandlerThread(handler);
-            }
-        }
-
-        public void runWithScissorsForDumpIfReady(@NonNull Runnable function) {
-            final Handler handler;
-            synchronized (pendingTasks) {
-                if (this.handler == null) {
-                    Log.d(TAG, "The handler is not ready. Ignore the DiscoveryManager dump");
-                    return;
-                } else {
-                    handler = this.handler;
-                }
-            }
-            HandlerUtils.runWithScissorsForDump(handler, function, 10_000);
-        }
-    }
-
-    /**
      * Do the cleanup of the MdnsDiscoveryManager
      */
     public void shutDown() {
diff --git a/service-t/src/com/android/server/connectivity/mdns/MdnsFeatureFlags.java b/service-t/src/com/android/server/connectivity/mdns/MdnsFeatureFlags.java
index 2f3bdc5..1cf5e4d 100644
--- a/service-t/src/com/android/server/connectivity/mdns/MdnsFeatureFlags.java
+++ b/service-t/src/com/android/server/connectivity/mdns/MdnsFeatureFlags.java
@@ -95,6 +95,11 @@
             "nsd_cached_services_retention_time";
     public static final int DEFAULT_CACHED_SERVICES_RETENTION_TIME_MILLISECONDS = 10000;
 
+    /**
+     * A feature flag to control whether the accurate delay callback should be enabled.
+     */
+    public static final String NSD_ACCURATE_DELAY_CALLBACK = "nsd_accurate_delay_callback";
+
     // Flag for offload feature
     public final boolean mIsMdnsOffloadFeatureEnabled;
 
@@ -128,6 +133,9 @@
     // Retention Time for cached services
     public final long mCachedServicesRetentionTime;
 
+    // Flag for accurate delay callback
+    public final boolean mIsAccurateDelayCallbackEnabled;
+
     // Flag to use shorter (16 characters + .local) hostnames
     public final boolean mIsShortHostnamesEnabled;
 
@@ -231,6 +239,14 @@
     }
 
     /**
+     * Indicates whether {@link #NSD_ACCURATE_DELAY_CALLBACK} is enabled, including for testing.
+     */
+    public boolean isAccurateDelayCallbackEnabled() {
+        return mIsAccurateDelayCallbackEnabled
+                || isForceEnabledForTest(NSD_ACCURATE_DELAY_CALLBACK);
+    }
+
+    /**
      * The constructor for {@link MdnsFeatureFlags}.
      */
     public MdnsFeatureFlags(boolean isOffloadFeatureEnabled,
@@ -244,6 +260,7 @@
             boolean avoidAdvertisingEmptyTxtRecords,
             boolean isCachedServicesRemovalEnabled,
             long cachedServicesRetentionTime,
+            boolean isAccurateDelayCallbackEnabled,
             boolean isShortHostnamesEnabled,
             @Nullable FlagOverrideProvider overrideProvider) {
         mIsMdnsOffloadFeatureEnabled = isOffloadFeatureEnabled;
@@ -257,6 +274,7 @@
         mAvoidAdvertisingEmptyTxtRecords = avoidAdvertisingEmptyTxtRecords;
         mIsCachedServicesRemovalEnabled = isCachedServicesRemovalEnabled;
         mCachedServicesRetentionTime = cachedServicesRetentionTime;
+        mIsAccurateDelayCallbackEnabled = isAccurateDelayCallbackEnabled;
         mIsShortHostnamesEnabled = isShortHostnamesEnabled;
         mOverrideProvider = overrideProvider;
     }
@@ -281,6 +299,7 @@
         private boolean mAvoidAdvertisingEmptyTxtRecords;
         private boolean mIsCachedServicesRemovalEnabled;
         private long mCachedServicesRetentionTime;
+        private boolean mIsAccurateDelayCallbackEnabled;
         private boolean mIsShortHostnamesEnabled;
         private FlagOverrideProvider mOverrideProvider;
 
@@ -299,6 +318,7 @@
             mAvoidAdvertisingEmptyTxtRecords = true; // Default enabled.
             mIsCachedServicesRemovalEnabled = false;
             mCachedServicesRetentionTime = DEFAULT_CACHED_SERVICES_RETENTION_TIME_MILLISECONDS;
+            mIsAccurateDelayCallbackEnabled = false;
             mIsShortHostnamesEnabled = true; // Default enabled.
             mOverrideProvider = null;
         }
@@ -426,6 +446,16 @@
         }
 
         /**
+         * Set whether the accurate delay callback is enabled.
+         *
+         * @see #NSD_ACCURATE_DELAY_CALLBACK
+         */
+        public Builder setIsAccurateDelayCallbackEnabled(boolean isAccurateDelayCallbackEnabled) {
+            mIsAccurateDelayCallbackEnabled = isAccurateDelayCallbackEnabled;
+            return this;
+        }
+
+        /**
          * Set whether the short hostnames feature is enabled.
          *
          * @see #NSD_USE_SHORT_HOSTNAMES
@@ -450,6 +480,7 @@
                     mAvoidAdvertisingEmptyTxtRecords,
                     mIsCachedServicesRemovalEnabled,
                     mCachedServicesRetentionTime,
+                    mIsAccurateDelayCallbackEnabled,
                     mIsShortHostnamesEnabled,
                     mOverrideProvider);
         }
diff --git a/service-t/src/com/android/server/connectivity/mdns/MdnsServiceTypeClient.java b/service-t/src/com/android/server/connectivity/mdns/MdnsServiceTypeClient.java
index 8c86fb8..56d4b9a 100644
--- a/service-t/src/com/android/server/connectivity/mdns/MdnsServiceTypeClient.java
+++ b/service-t/src/com/android/server/connectivity/mdns/MdnsServiceTypeClient.java
@@ -20,6 +20,7 @@
 import static com.android.server.connectivity.mdns.MdnsSearchOptions.AGGRESSIVE_QUERY_MODE;
 import static com.android.server.connectivity.mdns.MdnsServiceCache.ServiceExpiredCallback;
 import static com.android.server.connectivity.mdns.MdnsServiceCache.findMatchedResponse;
+import static com.android.server.connectivity.mdns.MdnsQueryScheduler.ScheduledQueryTaskArgs;
 import static com.android.server.connectivity.mdns.util.MdnsUtils.Clock;
 import static com.android.server.connectivity.mdns.util.MdnsUtils.buildMdnsServiceInfoFromResponse;
 
@@ -36,6 +37,7 @@
 
 import com.android.net.module.util.CollectionUtils;
 import com.android.net.module.util.DnsUtils;
+import com.android.net.module.util.RealtimeScheduler;
 import com.android.net.module.util.SharedLog;
 import com.android.server.connectivity.mdns.util.MdnsUtils;
 
@@ -94,6 +96,9 @@
     private final boolean removeServiceAfterTtlExpires =
             MdnsConfigs.removeServiceAfterTtlExpires();
     private final Clock clock;
+    // Use RealtimeScheduler for query scheduling, which allows for more accurate sending of
+    // queries.
+    @Nullable private final RealtimeScheduler realtimeScheduler;
 
     @Nullable private MdnsSearchOptions searchOptions;
 
@@ -139,8 +144,7 @@
         public void handleMessage(Message msg) {
             switch (msg.what) {
                 case EVENT_START_QUERYTASK: {
-                    final MdnsQueryScheduler.ScheduledQueryTaskArgs taskArgs =
-                            (MdnsQueryScheduler.ScheduledQueryTaskArgs) msg.obj;
+                    final ScheduledQueryTaskArgs taskArgs = (ScheduledQueryTaskArgs) msg.obj;
                     // QueryTask should be run immediately after being created (not be scheduled in
                     // advance). Because the result of "makeResponsesForResolve" depends on answers
                     // that were received before it is called, so to take into account all answers
@@ -174,7 +178,7 @@
                     final long now = clock.elapsedRealtime();
                     lastSentTime = now;
                     final long minRemainingTtl = getMinRemainingTtl(now);
-                    MdnsQueryScheduler.ScheduledQueryTaskArgs args =
+                    final ScheduledQueryTaskArgs args =
                             mdnsQueryScheduler.scheduleNextRun(
                                     sentResult.taskArgs.config,
                                     minRemainingTtl,
@@ -189,10 +193,14 @@
                     sharedLog.log(String.format("Query sent with transactionId: %d. "
                                     + "Next run: sessionId: %d, in %d ms",
                             sentResult.transactionId, args.sessionId, timeToNextTaskMs));
-                    dependencies.sendMessageDelayed(
-                            handler,
-                            handler.obtainMessage(EVENT_START_QUERYTASK, args),
-                            timeToNextTaskMs);
+                    if (realtimeScheduler != null) {
+                        setDelayedTask(args, timeToNextTaskMs);
+                    } else {
+                        dependencies.sendMessageDelayed(
+                                handler,
+                                handler.obtainMessage(EVENT_START_QUERYTASK, args),
+                                timeToNextTaskMs);
+                    }
                     break;
                 }
                 default:
@@ -254,6 +262,14 @@
                 return List.of(new DatagramPacket(queryBuffer, 0, queryBuffer.length, address));
             }
         }
+
+        /**
+         * @see RealtimeScheduler
+         */
+        @Nullable
+        public RealtimeScheduler createRealtimeScheduler(@NonNull Handler handler) {
+            return new RealtimeScheduler(handler);
+        }
     }
 
     /**
@@ -301,6 +317,8 @@
         this.mdnsQueryScheduler = new MdnsQueryScheduler();
         this.cacheKey = new MdnsServiceCache.CacheKey(serviceType, socketKey);
         this.featureFlags = featureFlags;
+        this.realtimeScheduler = featureFlags.isAccurateDelayCallbackEnabled()
+                ? dependencies.createRealtimeScheduler(handler) : null;
     }
 
     /**
@@ -310,6 +328,9 @@
         removeScheduledTask();
         mdnsQueryScheduler.cancelScheduledRun();
         serviceCache.unregisterServiceExpiredCallback(cacheKey);
+        if (realtimeScheduler != null) {
+            realtimeScheduler.close();
+        }
     }
 
     private List<MdnsResponse> getExistingServices() {
@@ -317,6 +338,12 @@
                 ? serviceCache.getCachedServices(cacheKey) : Collections.emptyList();
     }
 
+    private void setDelayedTask(ScheduledQueryTaskArgs args, long timeToNextTaskMs) {
+        realtimeScheduler.removeDelayedMessage(EVENT_START_QUERYTASK);
+        realtimeScheduler.sendDelayedMessage(
+                handler.obtainMessage(EVENT_START_QUERYTASK, args), timeToNextTaskMs);
+    }
+
     /**
      * Registers {@code listener} for receiving discovery event of mDNS service instances, and
      * starts
@@ -363,7 +390,7 @@
         }
         final long minRemainingTtl = getMinRemainingTtl(now);
         if (hadReply) {
-            MdnsQueryScheduler.ScheduledQueryTaskArgs args =
+            final ScheduledQueryTaskArgs args =
                     mdnsQueryScheduler.scheduleNextRun(
                             taskConfig,
                             minRemainingTtl,
@@ -377,10 +404,14 @@
             final long timeToNextTaskMs = calculateTimeToNextTask(args, now);
             sharedLog.log(String.format("Schedule a query. Next run: sessionId: %d, in %d ms",
                     args.sessionId, timeToNextTaskMs));
-            dependencies.sendMessageDelayed(
-                    handler,
-                    handler.obtainMessage(EVENT_START_QUERYTASK, args),
-                    timeToNextTaskMs);
+            if (realtimeScheduler != null) {
+                setDelayedTask(args, timeToNextTaskMs);
+            } else {
+                dependencies.sendMessageDelayed(
+                        handler,
+                        handler.obtainMessage(EVENT_START_QUERYTASK, args),
+                        timeToNextTaskMs);
+            }
         } else {
             final List<MdnsResponse> servicesToResolve = makeResponsesForResolve(socketKey);
             final QueryTask queryTask = new QueryTask(
@@ -420,7 +451,11 @@
     }
 
     private void removeScheduledTask() {
-        dependencies.removeMessages(handler, EVENT_START_QUERYTASK);
+        if (realtimeScheduler != null) {
+            realtimeScheduler.removeDelayedMessage(EVENT_START_QUERYTASK);
+        } else {
+            dependencies.removeMessages(handler, EVENT_START_QUERYTASK);
+        }
         sharedLog.log("Remove EVENT_START_QUERYTASK"
                 + ", current session: " + currentSessionId);
         ++currentSessionId;
@@ -506,10 +541,13 @@
                 }
             }
         }
-        if (dependencies.hasMessages(handler, EVENT_START_QUERYTASK)) {
+        final boolean hasScheduledTask = realtimeScheduler != null
+                ? realtimeScheduler.hasDelayedMessage(EVENT_START_QUERYTASK)
+                : dependencies.hasMessages(handler, EVENT_START_QUERYTASK);
+        if (hasScheduledTask) {
             final long now = clock.elapsedRealtime();
             final long minRemainingTtl = getMinRemainingTtl(now);
-            MdnsQueryScheduler.ScheduledQueryTaskArgs args =
+            final ScheduledQueryTaskArgs args =
                     mdnsQueryScheduler.maybeRescheduleCurrentRun(now, minRemainingTtl,
                             lastSentTime, currentSessionId + 1,
                             searchOptions.numOfQueriesBeforeBackoff());
@@ -518,10 +556,14 @@
                 final long timeToNextTaskMs = calculateTimeToNextTask(args, now);
                 sharedLog.log(String.format("Reschedule a query. Next run: sessionId: %d, in %d ms",
                         args.sessionId, timeToNextTaskMs));
-                dependencies.sendMessageDelayed(
-                        handler,
-                        handler.obtainMessage(EVENT_START_QUERYTASK, args),
-                        timeToNextTaskMs);
+                if (realtimeScheduler != null) {
+                    setDelayedTask(args, timeToNextTaskMs);
+                } else {
+                    dependencies.sendMessageDelayed(
+                            handler,
+                            handler.obtainMessage(EVENT_START_QUERYTASK, args),
+                            timeToNextTaskMs);
+                }
             }
         }
     }
@@ -686,10 +728,10 @@
     private static class QuerySentArguments {
         private final int transactionId;
         private final List<String> subTypes = new ArrayList<>();
-        private final MdnsQueryScheduler.ScheduledQueryTaskArgs taskArgs;
+        private final ScheduledQueryTaskArgs taskArgs;
 
         QuerySentArguments(int transactionId, @NonNull List<String> subTypes,
-                @NonNull MdnsQueryScheduler.ScheduledQueryTaskArgs taskArgs) {
+                @NonNull ScheduledQueryTaskArgs taskArgs) {
             this.transactionId = transactionId;
             this.subTypes.addAll(subTypes);
             this.taskArgs = taskArgs;
@@ -698,14 +740,14 @@
 
     // A FutureTask that enqueues a single query, and schedule a new FutureTask for the next task.
     private class QueryTask implements Runnable {
-        private final MdnsQueryScheduler.ScheduledQueryTaskArgs taskArgs;
+        private final ScheduledQueryTaskArgs taskArgs;
         private final List<MdnsResponse> servicesToResolve = new ArrayList<>();
         private final List<String> subtypes = new ArrayList<>();
         private final boolean sendDiscoveryQueries;
         private final List<MdnsResponse> existingServices = new ArrayList<>();
         private final boolean onlyUseIpv6OnIpv6OnlyNetworks;
         private final SocketKey socketKey;
-        QueryTask(@NonNull MdnsQueryScheduler.ScheduledQueryTaskArgs taskArgs,
+        QueryTask(@NonNull ScheduledQueryTaskArgs taskArgs,
                 @NonNull Collection<MdnsResponse> servicesToResolve,
                 @NonNull Collection<String> subtypes, boolean sendDiscoveryQueries,
                 @NonNull Collection<MdnsResponse> existingServices,
@@ -771,7 +813,7 @@
         return minRemainingTtl == Long.MAX_VALUE ? 0 : minRemainingTtl;
     }
 
-    private static long calculateTimeToNextTask(MdnsQueryScheduler.ScheduledQueryTaskArgs args,
+    private static long calculateTimeToNextTask(ScheduledQueryTaskArgs args,
             long now) {
         return Math.max(args.timeToRun - now, 0);
     }
diff --git a/service-t/src/com/android/server/connectivity/mdns/MdnsSocketProvider.java b/service-t/src/com/android/server/connectivity/mdns/MdnsSocketProvider.java
index 1212e29..d91bd11 100644
--- a/service-t/src/com/android/server/connectivity/mdns/MdnsSocketProvider.java
+++ b/service-t/src/com/android/server/connectivity/mdns/MdnsSocketProvider.java
@@ -564,7 +564,6 @@
             // Never try mDNS on cellular, or on interfaces with incompatible flags
             if (CollectionUtils.contains(transports, TRANSPORT_CELLULAR)
                     || iface.isLoopback()
-                    || iface.isPointToPoint()
                     || iface.isVirtual()
                     || !iface.isUp()) {
                 return false;
diff --git a/service-t/src/com/android/server/net/NetworkStatsService.java b/service-t/src/com/android/server/net/NetworkStatsService.java
index a8e3203..5c5f4ca 100644
--- a/service-t/src/com/android/server/net/NetworkStatsService.java
+++ b/service-t/src/com/android/server/net/NetworkStatsService.java
@@ -183,15 +183,17 @@
 import com.android.net.module.util.NetworkStatsUtils;
 import com.android.net.module.util.PermissionUtils;
 import com.android.net.module.util.SharedLog;
+import com.android.net.module.util.SkDestroyListener;
 import com.android.net.module.util.Struct;
 import com.android.net.module.util.Struct.S32;
 import com.android.net.module.util.Struct.U8;
 import com.android.net.module.util.bpf.CookieTagMapKey;
 import com.android.net.module.util.bpf.CookieTagMapValue;
+import com.android.net.module.util.netlink.InetDiagMessage;
+import com.android.net.module.util.netlink.StructInetDiagSockId;
 import com.android.networkstack.apishim.BroadcastOptionsShimImpl;
 import com.android.networkstack.apishim.ConstantsShim;
 import com.android.networkstack.apishim.common.UnsupportedApiLevelException;
-import com.android.server.BpfNetMaps;
 import com.android.server.connectivity.ConnectivityResources;
 
 import java.io.File;
@@ -216,6 +218,7 @@
 import java.util.concurrent.Executor;
 import java.util.concurrent.Semaphore;
 import java.util.concurrent.TimeUnit;
+import java.util.function.Consumer;
 
 /**
  * Collect and persist detailed network statistics, and provide this data to
@@ -726,12 +729,14 @@
             mTrafficStatsUidCache = null;
         }
 
-        // TODO: Remove bpfNetMaps creation and always start SkDestroyListener
-        // Following code is for the experiment to verify the SkDestroyListener refactoring. Based
-        // on the experiment flag, BpfNetMaps starts C SkDestroyListener (existing code) or
-        // NetworkStatsService starts Java SkDestroyListener (new code).
-        final BpfNetMaps bpfNetMaps = mDeps.makeBpfNetMaps(mContext);
-        mSkDestroyListener = mDeps.makeSkDestroyListener(mCookieTagMap, mHandler);
+        mSkDestroyListener = mDeps.makeSkDestroyListener((message) -> {
+            final StructInetDiagSockId sockId = message.inetDiagMsg.id;
+            try {
+                mCookieTagMap.deleteEntry(new CookieTagMapKey(sockId.cookie));
+            } catch (ErrnoException e) {
+                Log.e(TAG, "Failed to delete CookieTagMap entry for " + sockId.cookie  + ": " + e);
+            }
+        }, mHandler);
         mHandler.post(mSkDestroyListener::start);
     }
 
@@ -952,16 +957,11 @@
             return Build.isDebuggable();
         }
 
-        /** Create a new BpfNetMaps. */
-        public BpfNetMaps makeBpfNetMaps(Context ctx) {
-            return new BpfNetMaps(ctx);
-        }
-
         /** Create a new SkDestroyListener. */
-        public SkDestroyListener makeSkDestroyListener(
-                IBpfMap<CookieTagMapKey, CookieTagMapValue> cookieTagMap, Handler handler) {
-            return new SkDestroyListener(
-                    cookieTagMap, handler, new SharedLog(MAX_SOCKET_DESTROY_LISTENER_LOGS, TAG));
+        public SkDestroyListener makeSkDestroyListener(Consumer<InetDiagMessage> consumer,
+                Handler handler) {
+            return SkDestroyListener.makeSkDestroyListener(consumer, handler,
+                    new SharedLog(MAX_SOCKET_DESTROY_LISTENER_LOGS, TAG));
         }
 
         /**
diff --git a/service-t/src/com/android/server/net/SkDestroyListener.java b/service-t/src/com/android/server/net/SkDestroyListener.java
deleted file mode 100644
index a6cc2b5..0000000
--- a/service-t/src/com/android/server/net/SkDestroyListener.java
+++ /dev/null
@@ -1,84 +0,0 @@
-/*
- * 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.server.net;
-
-import static android.system.OsConstants.NETLINK_INET_DIAG;
-
-import android.os.Handler;
-import android.system.ErrnoException;
-
-import com.android.net.module.util.IBpfMap;
-import com.android.net.module.util.SharedLog;
-import com.android.net.module.util.bpf.CookieTagMapKey;
-import com.android.net.module.util.bpf.CookieTagMapValue;
-import com.android.net.module.util.ip.NetlinkMonitor;
-import com.android.net.module.util.netlink.InetDiagMessage;
-import com.android.net.module.util.netlink.NetlinkMessage;
-import com.android.net.module.util.netlink.StructInetDiagSockId;
-
-import java.io.PrintWriter;
-
-/**
- * Monitor socket destroy and delete entry from cookie tag bpf map.
- */
-public class SkDestroyListener extends NetlinkMonitor {
-    private static final int SKNLGRP_INET_TCP_DESTROY = 1;
-    private static final int SKNLGRP_INET_UDP_DESTROY = 2;
-    private static final int SKNLGRP_INET6_TCP_DESTROY = 3;
-    private static final int SKNLGRP_INET6_UDP_DESTROY = 4;
-
-    // TODO: if too many sockets are closed too quickly, this can overflow the socket buffer, and
-    // some entries in mCookieTagMap will not be freed. In order to fix this it would be needed to
-    // periodically dump all sockets and remove the tag entries for sockets that have been closed.
-    // For now, set a large-enough buffer that hundreds of sockets can be closed without getting
-    // ENOBUFS and leaking mCookieTagMap entries.
-    private static final int SOCK_RCV_BUF_SIZE = 512 * 1024;
-
-    private final IBpfMap<CookieTagMapKey, CookieTagMapValue> mCookieTagMap;
-
-    SkDestroyListener(final IBpfMap<CookieTagMapKey, CookieTagMapValue> cookieTagMap,
-            final Handler handler, final SharedLog log) {
-        super(handler, log, "SkDestroyListener", NETLINK_INET_DIAG,
-                1 << (SKNLGRP_INET_TCP_DESTROY - 1)
-                        | 1 << (SKNLGRP_INET_UDP_DESTROY - 1)
-                        | 1 << (SKNLGRP_INET6_TCP_DESTROY - 1)
-                        | 1 << (SKNLGRP_INET6_UDP_DESTROY - 1),
-                SOCK_RCV_BUF_SIZE);
-        mCookieTagMap = cookieTagMap;
-    }
-
-    @Override
-    public void processNetlinkMessage(final NetlinkMessage nlMsg, final long whenMs) {
-        if (!(nlMsg instanceof InetDiagMessage)) {
-            mLog.e("Received non InetDiagMessage");
-            return;
-        }
-        final StructInetDiagSockId sockId = ((InetDiagMessage) nlMsg).inetDiagMsg.id;
-        try {
-            mCookieTagMap.deleteEntry(new CookieTagMapKey(sockId.cookie));
-        } catch (ErrnoException e) {
-            mLog.e("Failed to delete CookieTagMap entry for " + sockId.cookie  + ": " + e);
-        }
-    }
-
-    /**
-     * Dump the contents of SkDestroyListener log.
-     */
-    public void dump(PrintWriter pw) {
-        mLog.reverseDump(pw);
-    }
-}
diff --git a/service/ServiceConnectivityResources/OWNERS b/service/ServiceConnectivityResources/OWNERS
index df41ff2..c3c08ee 100644
--- a/service/ServiceConnectivityResources/OWNERS
+++ b/service/ServiceConnectivityResources/OWNERS
@@ -1,2 +1,3 @@
+per-file res/raw/ct_public_keys.pem = file:platform/packages/modules/Connectivity:main:/networksecurity/OWNERS
 per-file res/values/config_thread.xml = file:platform/packages/modules/Connectivity:main:/thread/OWNERS
 per-file res/values/overlayable.xml = file:platform/packages/modules/Connectivity:main:/thread/OWNERS
diff --git a/service/ServiceConnectivityResources/res/raw/ct_public_keys.pem b/service/ServiceConnectivityResources/res/raw/ct_public_keys.pem
new file mode 100644
index 0000000..8a5ebbf
--- /dev/null
+++ b/service/ServiceConnectivityResources/res/raw/ct_public_keys.pem
@@ -0,0 +1,56 @@
+-----BEGIN PUBLIC KEY-----
+MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAmDwwE2FRpVJlw58fo5Ra
+Fsocb7DP3FJwwuaghXL3xPtyZisDDXIpfVG+UwDPyIGrRuYzeu9pjZ/0xGSYSPZ0
+l/H8L2XurInoAbj+Z370HB7W3njIOqG9rw5N6u/xT4nscBj1HKeUwh+Hwc0F1UHS
+MP8J32nWAfVepHrte3Jy+w/V7BId6WjJmxtI9OoJ7WTsoTeD+jLANUJWtpbx0p1L
+OAy70BlHbB0UvAJdMH149qi7Y9KaJ74Ea2ofKY43NWGgWfR+fY6V7CCfUXCOgvNM
+qq5QGyMnFKrlP0XkoOaVJkK92VEtyNff8KUXik2ZyUzhNkg4ZplCrhESWeykckB/
+mdZpVc45KZ+6Sx3U+FF30eRwlu2Nw2h1KKHzYfa6M1bcy1f/xw+IDq4R+1rR7sPb
+J2mMKz0OPeCXwGEXWzBuMOs0IQu6gyNdyVZcRSyQ+LcUzvEwksLP6G/ycqmwVfdw
+JE28k3MPUR3IxnMDQrdcZb7M7kjBoykKW3jQfwlEoK4EcNQbMXVn8Ws8rcwgQcQJ
+MjjQnbISojsJYo2fG+TE6d9rORB6CYVzICOj4YguXm4LO89cYQlR600W32pP5y3o
+3/yAd9OjsKrNfREDlcCXUx1APc7gOF351RFdHlDI0+RF/pIHbH3sww3VMCJ+tjst
+ZldgJk9yaz0cvOdKyVWC83ECAwEAAQ==
+-----END PUBLIC KEY-----
+-----BEGIN PUBLIC KEY-----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+-----END PUBLIC KEY-----
+-----BEGIN PUBLIC KEY-----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+-----END PUBLIC KEY-----
+-----BEGIN PUBLIC KEY-----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+-----END PUBLIC KEY-----
diff --git a/service/ServiceConnectivityResources/res/values/config.xml b/service/ServiceConnectivityResources/res/values/config.xml
index 2d3647a..1b0f29d 100644
--- a/service/ServiceConnectivityResources/res/values/config.xml
+++ b/service/ServiceConnectivityResources/res/values/config.xml
@@ -135,6 +135,15 @@
     <string-array translatable="false" name="config_nsdOffloadServicesPriority">
     </string-array>
 
+    <!-- An array of service types that shouldn't be offloaded via NsdManager#registerOffloadEngine.
+         Format is [service type], for example: "_testservice._tcp"
+         Due to limited RAM in hardware offload, we prioritize user-impacting services.
+         _googlezone._tcp, an internal Googlecast service, was therefore blocked.
+    -->
+    <string-array name="config_nsdOffloadServicesDenyList" translatable="false">
+        <item>_googlezone._tcp</item>
+    </string-array>
+
     <!-- Whether to use an ongoing notification for signing in to captive portals, instead of a
          notification that can be dismissed. -->
     <bool name="config_ongoingSignInNotification">false</bool>
diff --git a/service/ServiceConnectivityResources/res/values/overlayable.xml b/service/ServiceConnectivityResources/res/values/overlayable.xml
index 7ac86aa..5c0ba78 100644
--- a/service/ServiceConnectivityResources/res/values/overlayable.xml
+++ b/service/ServiceConnectivityResources/res/values/overlayable.xml
@@ -31,6 +31,7 @@
             <item type="integer" name="config_networkWakeupPacketMask"/>
             <item type="integer" name="config_networkNotifySwitchType"/>
             <item type="array" name="config_networkNotifySwitches"/>
+            <item type="array" name="config_nsdOffloadServicesDenyList"/>
             <item type="array" name="config_nsdOffloadServicesPriority"/>
             <item type="bool" name="config_ongoingSignInNotification"/>
             <item type="bool" name="config_autoCancelNetworkNotifications"/>
diff --git a/service/libconnectivity/include/connectivity_native.h b/service/libconnectivity/include/connectivity_native.h
index f4676a9..f264b68 100644
--- a/service/libconnectivity/include/connectivity_native.h
+++ b/service/libconnectivity/include/connectivity_native.h
@@ -20,12 +20,6 @@
 #include <sys/cdefs.h>
 #include <netinet/in.h>
 
-// For branches that do not yet have __ANDROID_API_U__ defined, like module
-// release branches.
-#ifndef __ANDROID_API_U__
-#define __ANDROID_API_U__ 34
-#endif
-
 __BEGIN_DECLS
 
 /**
@@ -41,7 +35,7 @@
  *
  * @param port Int corresponding to port number.
  */
-int AConnectivityNative_blockPortForBind(in_port_t port) __INTRODUCED_IN(__ANDROID_API_U__);
+int AConnectivityNative_blockPortForBind(in_port_t port) __INTRODUCED_IN(34);
 
 /**
  * Unblocks a port that has previously been blocked.
@@ -54,7 +48,7 @@
  *
  * @param port Int corresponding to port number.
  */
-int AConnectivityNative_unblockPortForBind(in_port_t port) __INTRODUCED_IN(__ANDROID_API_U__);
+int AConnectivityNative_unblockPortForBind(in_port_t port) __INTRODUCED_IN(34);
 
 /**
  * Unblocks all ports that have previously been blocked.
@@ -64,7 +58,7 @@
  *  - EPERM if the UID of the client doesn't have network stack permission
  *  - Other errors as per https://man7.org/linux/man-pages/man2/bpf.2.html
  */
-int AConnectivityNative_unblockAllPortsForBind() __INTRODUCED_IN(__ANDROID_API_U__);
+int AConnectivityNative_unblockAllPortsForBind() __INTRODUCED_IN(34);
 
 /**
  * Gets the list of ports that have been blocked.
@@ -79,7 +73,7 @@
  *              blocked ports, which may be larger than the ports array that was filled.
  */
 int AConnectivityNative_getPortsBlockedForBind(in_port_t* _Nonnull ports, size_t* _Nonnull count)
-    __INTRODUCED_IN(__ANDROID_API_U__);
+    __INTRODUCED_IN(34);
 
 __END_DECLS
 
diff --git a/service/native/libs/libclat/Android.bp b/service/native/libs/libclat/Android.bp
index 6c1c2c4..9554bd8 100644
--- a/service/native/libs/libclat/Android.bp
+++ b/service/native/libs/libclat/Android.bp
@@ -47,6 +47,7 @@
     srcs: [
         "clatutils_test.cpp",
     ],
+    stl: "libc++_static",
     header_libs: [
         "bpf_connectivity_headers",
     ],
diff --git a/service/src/com/android/server/BpfNetMaps.java b/service/src/com/android/server/BpfNetMaps.java
index c743573..36c0cf9 100644
--- a/service/src/com/android/server/BpfNetMaps.java
+++ b/service/src/com/android/server/BpfNetMaps.java
@@ -38,16 +38,16 @@
 import static android.net.ConnectivityManager.BLOCKED_REASON_NONE;
 import static android.net.ConnectivityManager.FIREWALL_RULE_ALLOW;
 import static android.net.ConnectivityManager.FIREWALL_RULE_DENY;
-import static android.net.INetd.PERMISSION_INTERNET;
-import static android.net.INetd.PERMISSION_NONE;
-import static android.net.INetd.PERMISSION_UNINSTALLED;
-import static android.net.INetd.PERMISSION_UPDATE_DEVICE_STATS;
 import static android.system.OsConstants.EINVAL;
 import static android.system.OsConstants.ENODEV;
 import static android.system.OsConstants.ENOENT;
 import static android.system.OsConstants.EOPNOTSUPP;
 
 import static com.android.server.ConnectivityStatsLog.NETWORK_BPF_MAP_INFO;
+import static com.android.server.connectivity.NetworkPermissions.PERMISSION_NONE;
+import static com.android.server.connectivity.NetworkPermissions.TRAFFIC_PERMISSION_INTERNET;
+import static com.android.server.connectivity.NetworkPermissions.TRAFFIC_PERMISSION_UNINSTALLED;
+import static com.android.server.connectivity.NetworkPermissions.TRAFFIC_PERMISSION_UPDATE_DEVICE_STATS;
 
 import android.app.StatsManager;
 import android.content.Context;
@@ -139,8 +139,8 @@
     private static IBpfMap<U32, Bool> sLocalNetBlockedUidMap = null;
 
     private static final List<Pair<Integer, String>> PERMISSION_LIST = Arrays.asList(
-            Pair.create(PERMISSION_INTERNET, "PERMISSION_INTERNET"),
-            Pair.create(PERMISSION_UPDATE_DEVICE_STATS, "PERMISSION_UPDATE_DEVICE_STATS")
+            Pair.create(TRAFFIC_PERMISSION_INTERNET, "PERMISSION_INTERNET"),
+            Pair.create(TRAFFIC_PERMISSION_UPDATE_DEVICE_STATS, "PERMISSION_UPDATE_DEVICE_STATS")
     );
 
     /**
@@ -464,7 +464,7 @@
      ToDo : Remove this method when SdkLevel.isAtLeastB() is fixed, aosp is at sdk level 36 or use
      NetworkStackUtils.isAtLeast25Q2 when it is moved to a static lib.
      */
-    private static boolean isAtLeast25Q2() {
+    public static boolean isAtLeast25Q2() {
         return SdkLevel.isAtLeastB()  || (SdkLevel.isAtLeastV()
                 && "Baklava".equals(Build.VERSION.CODENAME));
     }
@@ -870,7 +870,8 @@
         }
 
         // Remove the entry if package is uninstalled or uid has only INTERNET permission.
-        if (permissions == PERMISSION_UNINSTALLED || permissions == PERMISSION_INTERNET) {
+        if (permissions == TRAFFIC_PERMISSION_UNINSTALLED
+                || permissions == TRAFFIC_PERMISSION_INTERNET) {
             for (final int uid : uids) {
                 try {
                     sUidPermissionMap.deleteEntry(new S32(uid));
@@ -905,13 +906,18 @@
             final InetAddress address, final int protocol, final int remotePort,
             final boolean isAllowed) {
         throwIfPre25Q2("addLocalNetAccess is not available on pre-B devices");
-        final int ifIndex = mDeps.getIfIndex(iface);
+        final int ifIndex;
+        if (iface == null) {
+            ifIndex = 0;
+        } else {
+            ifIndex = mDeps.getIfIndex(iface);
+        }
         if (ifIndex == 0) {
             Log.e(TAG, "Failed to get if index, skip addLocalNetAccess for " + address
                     + "(" + iface + ")");
             return;
         }
-        LocalNetAccessKey localNetAccessKey = new LocalNetAccessKey(lpmBitlen, ifIndex,
+        final LocalNetAccessKey localNetAccessKey = new LocalNetAccessKey(lpmBitlen, ifIndex,
                 address, protocol, remotePort);
 
         try {
@@ -923,28 +929,68 @@
     }
 
     /**
-     * False if the configuration is disallowed.
-     *
+     * Remove configuration to local_net_access trie map.
+     * @param lpmBitlen prefix length that will be used for longest matching
+     * @param iface interface name
+     * @param address remote address. ipv4 addresses would be mapped to v6
+     * @param protocol required for longest match in special cases
+     * @param remotePort src/dst port for ingress/egress
+     */
+    @RequiresApi(Build.VERSION_CODES.CUR_DEVELOPMENT)
+    public void removeLocalNetAccess(final int lpmBitlen, final String iface,
+            final InetAddress address, final int protocol, final int remotePort) {
+        throwIfPre25Q2("removeLocalNetAccess is not available on pre-B devices");
+        final int ifIndex;
+        if (iface == null) {
+            ifIndex = 0;
+        } else {
+            ifIndex = mDeps.getIfIndex(iface);
+        }
+        if (ifIndex == 0) {
+            Log.e(TAG, "Failed to get if index, skip removeLocalNetAccess for " + address
+                    + "(" + iface + ")");
+            return;
+        }
+        final LocalNetAccessKey localNetAccessKey = new LocalNetAccessKey(lpmBitlen, ifIndex,
+                address, protocol, remotePort);
+
+        try {
+            sLocalNetAccessMap.deleteEntry(localNetAccessKey);
+        } catch (ErrnoException e) {
+            Log.e(TAG, "Failed to remove local network access for localNetAccessKey : "
+                    + localNetAccessKey);
+        }
+    }
+
+    /**
+     * Fetches value available in local_net_access bpf map for provided configuration
      * @param lpmBitlen  prefix length that will be used for longest matching
      * @param iface    interface name
      * @param address    remote address. ipv4 addresses would be mapped to v6
      * @param protocol   required for longest match in special cases
      * @param remotePort src/dst port for ingress/egress
+     * @return false if the configuration is disallowed, true if the configuration is absent i.e. it
+     * is not local network or if configuration is allowed like local dns servers.
      */
     @RequiresApi(Build.VERSION_CODES.CUR_DEVELOPMENT)
     public boolean getLocalNetAccess(final int lpmBitlen, final String iface,
             final InetAddress address, final int protocol, final int remotePort) {
         throwIfPre25Q2("getLocalNetAccess is not available on pre-B devices");
-        final int ifIndex = mDeps.getIfIndex(iface);
+        final int ifIndex;
+        if (iface == null) {
+            ifIndex = 0;
+        } else {
+            ifIndex = mDeps.getIfIndex(iface);
+        }
         if (ifIndex == 0) {
             Log.e(TAG, "Failed to get if index, returning default from getLocalNetAccess for "
                     + address + "(" + iface + ")");
             return true;
         }
-        LocalNetAccessKey localNetAccessKey = new LocalNetAccessKey(lpmBitlen, ifIndex,
+        final LocalNetAccessKey localNetAccessKey = new LocalNetAccessKey(lpmBitlen, ifIndex,
                 address, protocol, remotePort);
         try {
-            Bool value = sLocalNetAccessMap.getValue(localNetAccessKey);
+            final Bool value = sLocalNetAccessMap.getValue(localNetAccessKey);
             return value == null ? true : value.val;
         } catch (ErrnoException e) {
             Log.e(TAG, "Failed to find local network access configuration for "
@@ -972,10 +1018,10 @@
      * @param uid application uid that needs check if local network calls are blocked.
      */
     @RequiresApi(Build.VERSION_CODES.CUR_DEVELOPMENT)
-    public boolean getUidValueFromLocalNetBlockMap(final int uid) {
-        throwIfPre25Q2("getUidValueFromLocalNetBlockMap is not available on pre-B devices");
+    public boolean isUidBlockedFromUsingLocalNetwork(final int uid) {
+        throwIfPre25Q2("isUidBlockedFromUsingLocalNetwork is not available on pre-B devices");
         try {
-            Bool value = sLocalNetBlockedUidMap.getValue(new U32(uid));
+            final Bool value = sLocalNetBlockedUidMap.getValue(new U32(uid));
             return value == null ? false : value.val;
         } catch (ErrnoException e) {
             Log.e(TAG, "Failed to find uid(" + uid
@@ -1013,10 +1059,10 @@
             // Key of uid permission map is appId
             // TODO: Rename map name
             final U8 permissions = sUidPermissionMap.getValue(new S32(appId));
-            return permissions != null ? permissions.val : PERMISSION_INTERNET;
+            return permissions != null ? permissions.val : TRAFFIC_PERMISSION_INTERNET;
         } catch (ErrnoException e) {
             Log.wtf(TAG, "Failed to get permission for uid: " + uid);
-            return PERMISSION_INTERNET;
+            return TRAFFIC_PERMISSION_INTERNET;
         }
     }
 
@@ -1165,7 +1211,7 @@
         if (permissionMask == PERMISSION_NONE) {
             return "PERMISSION_NONE";
         }
-        if (permissionMask == PERMISSION_UNINSTALLED) {
+        if (permissionMask == TRAFFIC_PERMISSION_UNINSTALLED) {
             // PERMISSION_UNINSTALLED should never appear in the map
             return "PERMISSION_UNINSTALLED error!";
         }
diff --git a/service/src/com/android/server/ConnectivityService.java b/service/src/com/android/server/ConnectivityService.java
index 18801f0..b2e49e7 100644
--- a/service/src/com/android/server/ConnectivityService.java
+++ b/service/src/com/android/server/ConnectivityService.java
@@ -109,8 +109,8 @@
 import static android.net.NetworkCapabilities.REDACT_FOR_ACCESS_FINE_LOCATION;
 import static android.net.NetworkCapabilities.REDACT_FOR_LOCAL_MAC_ADDRESS;
 import static android.net.NetworkCapabilities.REDACT_FOR_NETWORK_SETTINGS;
-import static android.net.NetworkCapabilities.RES_ID_UNSET;
 import static android.net.NetworkCapabilities.RES_ID_MATCH_ALL_RESERVATIONS;
+import static android.net.NetworkCapabilities.RES_ID_UNSET;
 import static android.net.NetworkCapabilities.TRANSPORT_CELLULAR;
 import static android.net.NetworkCapabilities.TRANSPORT_TEST;
 import static android.net.NetworkCapabilities.TRANSPORT_VPN;
@@ -146,6 +146,8 @@
 import static com.android.net.module.util.BpfUtils.BPF_CGROUP_UDP6_RECVMSG;
 import static com.android.net.module.util.BpfUtils.BPF_CGROUP_UDP6_SENDMSG;
 import static com.android.net.module.util.NetworkMonitorUtils.isPrivateDnsValidationRequired;
+import static com.android.net.module.util.NetworkStackConstants.IPV4_LOCAL_PREFIXES;
+import static com.android.net.module.util.NetworkStackConstants.MULTICAST_AND_BROADCAST_PREFIXES;
 import static com.android.net.module.util.PermissionUtils.enforceAnyPermissionOf;
 import static com.android.net.module.util.PermissionUtils.enforceNetworkStackPermission;
 import static com.android.net.module.util.PermissionUtils.enforceNetworkStackPermissionOr;
@@ -214,6 +216,7 @@
 import android.net.InetAddresses;
 import android.net.IpMemoryStore;
 import android.net.IpPrefix;
+import android.net.LinkAddress;
 import android.net.LinkProperties;
 import android.net.LocalNetworkConfig;
 import android.net.LocalNetworkInfo;
@@ -420,14 +423,14 @@
 import java.util.concurrent.CopyOnWriteArraySet;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicInteger;
+import java.util.concurrent.atomic.AtomicReference;
 import java.util.function.BiConsumer;
 import java.util.function.Consumer;
 
 /**
  * @hide
  */
-public class ConnectivityService extends IConnectivityManager.Stub
-        implements PendingIntent.OnFinished {
+public class ConnectivityService extends IConnectivityManager.Stub {
     private static final String TAG = ConnectivityService.class.getSimpleName();
 
     private static final String DIAG_ARG = "--diag";
@@ -561,6 +564,7 @@
     // The Context is created for UserHandle.ALL.
     private final Context mUserAllContext;
     private final Dependencies mDeps;
+    private final PermissionMonitor.Dependencies mPermissionMonitorDeps;
     private final ConnectivityFlags mFlags;
     // 0 is full bad, 100 is full good
     private int mDefaultInetConditionPublished = 0;
@@ -1020,6 +1024,8 @@
     private final LingerMonitor mLingerMonitor;
     private final SatelliteAccessController mSatelliteAccessController;
 
+    private final L2capNetworkProvider mL2capNetworkProvider;
+
     // sequence number of NetworkRequests
     private int mNextNetworkRequestId = NetworkRequest.FIRST_REQUEST_ID;
 
@@ -1620,6 +1626,11 @@
                     connectivityServiceInternalHandler);
         }
 
+        /** Creates an L2capNetworkProvider */
+        public L2capNetworkProvider makeL2capNetworkProvider(Context context) {
+            return new L2capNetworkProvider(context);
+        }
+
         /** Returns the data inactivity timeout to be used for cellular networks */
         public int getDefaultCellularDataInactivityTimeout() {
             return DeviceConfigUtils.getDeviceConfigPropertyInt(NAMESPACE_TETHERING_BOOT,
@@ -1798,12 +1809,13 @@
     public ConnectivityService(Context context) {
         this(context, getDnsResolver(context), new IpConnectivityLog(),
                 INetd.Stub.asInterface((IBinder) context.getSystemService(Context.NETD_SERVICE)),
-                new Dependencies());
+                new Dependencies(), new PermissionMonitor.Dependencies());
     }
 
     @VisibleForTesting
     protected ConnectivityService(Context context, IDnsResolver dnsresolver,
-            IpConnectivityLog logger, INetd netd, Dependencies deps) {
+            IpConnectivityLog logger, INetd netd, Dependencies deps,
+            PermissionMonitor.Dependencies mPermDeps) {
         if (DBG) log("ConnectivityService starting up");
 
         mDeps = Objects.requireNonNull(deps, "missing Dependencies");
@@ -1876,8 +1888,10 @@
         mNetd = netd;
         mBpfNetMaps = mDeps.getBpfNetMaps(mContext, netd);
         mHandlerThread = mDeps.makeHandlerThread("ConnectivityServiceThread");
+        mPermissionMonitorDeps = mPermDeps;
         mPermissionMonitor =
-                new PermissionMonitor(mContext, mNetd, mBpfNetMaps, mHandlerThread);
+                new PermissionMonitor(mContext, mNetd, mBpfNetMaps, mPermissionMonitorDeps,
+                        mHandlerThread);
         mHandlerThread.start();
         mHandler = new InternalHandler(mHandlerThread.getLooper());
         mTrackerHandler = new NetworkStateTrackerHandler(mHandlerThread.getLooper());
@@ -1899,11 +1913,12 @@
                 && mDeps.isFeatureEnabled(context, REQUEST_RESTRICTED_WIFI);
         mBackgroundFirewallChainEnabled = mDeps.isAtLeastV() && mDeps.isFeatureNotChickenedOut(
                 context, ConnectivityFlags.BACKGROUND_FIREWALL_CHAIN);
-        mUseDeclaredMethodsForCallbacksEnabled = mDeps.isFeatureEnabled(context,
-                ConnectivityFlags.USE_DECLARED_METHODS_FOR_CALLBACKS);
+        mUseDeclaredMethodsForCallbacksEnabled =
+                mDeps.isFeatureNotChickenedOut(context,
+                        ConnectivityFlags.USE_DECLARED_METHODS_FOR_CALLBACKS);
         // registerUidFrozenStateChangedCallback is only available on U+
         mQueueCallbacksForFrozenApps = mDeps.isAtLeastU()
-                && mDeps.isFeatureEnabled(context, QUEUE_CALLBACKS_FOR_FROZEN_APPS);
+                && mDeps.isFeatureNotChickenedOut(context, QUEUE_CALLBACKS_FOR_FROZEN_APPS);
         mCarrierPrivilegeAuthenticator = mDeps.makeCarrierPrivilegeAuthenticator(
                 mContext, mTelephonyManager, mRequestRestrictedWifiEnabled,
                 this::handleUidCarrierPrivilegesLost, mHandler);
@@ -2091,6 +2106,8 @@
         }
         mIngressToVpnAddressFiltering = mDeps.isAtLeastT()
                 && mDeps.isFeatureNotChickenedOut(mContext, INGRESS_TO_VPN_ADDRESS_FILTERING);
+
+        mL2capNetworkProvider = mDeps.makeL2capNetworkProvider(mContext);
     }
 
     /**
@@ -4126,6 +4143,10 @@
             mCarrierPrivilegeAuthenticator.start();
         }
 
+        if (mL2capNetworkProvider != null) {
+            mL2capNetworkProvider.start();
+        }
+
         // On T+ devices, register callback for statsd to pull NETWORK_BPF_MAP_INFO atom
         if (mDeps.isAtLeastT()) {
             mBpfNetMaps.setPullAtomCallback(mContext);
@@ -5384,12 +5405,12 @@
     }
 
     @VisibleForTesting
-    protected static boolean shouldCreateNetworksImmediately() {
+    protected static boolean shouldCreateNetworksImmediately(@NonNull NetworkCapabilities caps) {
         // The feature of creating the networks immediately was slated for U, but race conditions
         // detected late required this was flagged off.
         // TODO : enable this in a Mainline update or in V, and re-enable the test for this
         // in NetworkAgentTest.
-        return false;
+        return caps.hasCapability(NET_CAPABILITY_LOCAL_NETWORK);
     }
 
     private static boolean shouldCreateNativeNetwork(@NonNull NetworkAgentInfo nai,
@@ -5398,12 +5419,12 @@
         if (state == NetworkInfo.State.CONNECTED) return true;
         if (state != NetworkInfo.State.CONNECTING) {
             // TODO: throw if no WTFs are observed in the field.
-            if (shouldCreateNetworksImmediately()) {
+            if (shouldCreateNetworksImmediately(nai.getCapsNoCopy())) {
                 Log.wtf(TAG, "Uncreated network in invalid state: " + state);
             }
             return false;
         }
-        return nai.isVPN() || shouldCreateNetworksImmediately();
+        return nai.isVPN() || shouldCreateNetworksImmediately(nai.getCapsNoCopy());
     }
 
     private static boolean shouldDestroyNativeNetwork(@NonNull NetworkAgentInfo nai) {
@@ -5683,6 +5704,7 @@
         // destroyed pending replacement they will be sent when it is disconnected.
         maybeDisableForwardRulesForDisconnectingNai(nai, false /* sendCallbacks */);
         updateIngressToVpnAddressFiltering(null, nai.linkProperties, nai);
+        updateLocalNetworkAddresses(null, nai.linkProperties);
         try {
             mNetd.networkDestroy(nai.network.getNetId());
         } catch (RemoteException | ServiceSpecificException e) {
@@ -5801,7 +5823,7 @@
             }
 
             if (shouldTrackUidsForBlockedStatusCallbacks()
-                    && isAppRequest(nri)
+                    && nri.mMessenger != null
                     && !nri.mUidTrackedForBlockedStatus) {
                 Log.wtf(TAG, "Registered nri is not tracked for sending blocked status: " + nri);
             }
@@ -9583,6 +9605,8 @@
 
         updateIngressToVpnAddressFiltering(newLp, oldLp, networkAgent);
 
+        updateLocalNetworkAddresses(newLp, oldLp);
+
         updateMtu(newLp, oldLp);
         // TODO - figure out what to do for clat
 //        for (LinkProperties lp : newLp.getStackedLinks()) {
@@ -9762,6 +9786,219 @@
     }
 
     /**
+     * Update Local Network Addresses to LocalNetAccess BPF map.
+     * @param newLp new link properties
+     * @param oldLp old link properties
+     */
+    private void updateLocalNetworkAddresses(@Nullable final LinkProperties newLp,
+            @NonNull final LinkProperties oldLp) {
+
+        // The maps are available only after 25Q2 release
+        if (!BpfNetMaps.isAtLeast25Q2()) {
+            return;
+        }
+
+        final CompareResult<String> interfaceDiff = new CompareResult<>(
+                oldLp != null ? oldLp.getAllInterfaceNames() : null,
+                newLp != null ? newLp.getAllInterfaceNames() : null);
+
+        for (final String iface : interfaceDiff.added) {
+            addLocalAddressesToBpfMap(iface, MULTICAST_AND_BROADCAST_PREFIXES, newLp);
+        }
+        for (final String iface : interfaceDiff.removed) {
+            removeLocalAddressesFromBpfMap(iface, MULTICAST_AND_BROADCAST_PREFIXES, oldLp);
+        }
+
+        // The both list contain current link properties + stacked links for new and old LP.
+        final List<LinkProperties> newLinkProperties = new ArrayList<>();
+        final List<LinkProperties> oldLinkProperties = new ArrayList<>();
+
+        if (newLp != null) {
+            newLinkProperties.add(newLp);
+            newLinkProperties.addAll(newLp.getStackedLinks());
+        }
+        if (oldLp != null) {
+            oldLinkProperties.add(oldLp);
+            oldLinkProperties.addAll(oldLp.getStackedLinks());
+        }
+
+        // map contains interface name to list of local network prefixes added because of change
+        // in link properties
+        final Map<String, List<IpPrefix>> prefixesAddedForInterface = new ArrayMap<>();
+
+        final CompareResult<LinkProperties> linkPropertiesDiff = new CompareResult<>(
+                oldLinkProperties, newLinkProperties);
+
+        for (LinkProperties linkProperty : linkPropertiesDiff.added) {
+            final List<IpPrefix> unicastLocalPrefixesToBeAdded = new ArrayList<>();
+            for (LinkAddress linkAddress : linkProperty.getLinkAddresses()) {
+                unicastLocalPrefixesToBeAdded.addAll(
+                        getLocalNetworkPrefixesForAddress(linkAddress));
+            }
+            addLocalAddressesToBpfMap(linkProperty.getInterfaceName(),
+                    unicastLocalPrefixesToBeAdded, linkProperty);
+
+            // populating interface name -> ip prefixes which were added to local_net_access map.
+            if (!prefixesAddedForInterface.containsKey(linkProperty.getInterfaceName())) {
+                prefixesAddedForInterface.put(linkProperty.getInterfaceName(), new ArrayList<>());
+            }
+            prefixesAddedForInterface.get(linkProperty.getInterfaceName())
+                    .addAll(unicastLocalPrefixesToBeAdded);
+        }
+
+        for (LinkProperties linkProperty : linkPropertiesDiff.removed) {
+            final List<IpPrefix> unicastLocalPrefixesToBeRemoved = new ArrayList<>();
+            final List<IpPrefix> unicastLocalPrefixesAdded = prefixesAddedForInterface.getOrDefault(
+                    linkProperty.getInterfaceName(), Collections.emptyList());
+
+            for (LinkAddress linkAddress : linkProperty.getLinkAddresses()) {
+                unicastLocalPrefixesToBeRemoved.addAll(
+                        getLocalNetworkPrefixesForAddress(linkAddress));
+            }
+
+            // This is to ensure if 10.0.10.0/24 was added and 10.0.11.0/24 was removed both will
+            // still populate the same prefix of 10.0.0.0/8, which mean 10.0.0.0/8 should not be
+            // removed due to removal of 10.0.11.0/24
+            unicastLocalPrefixesToBeRemoved.removeAll(unicastLocalPrefixesAdded);
+
+            removeLocalAddressesFromBpfMap(linkProperty.getInterfaceName(),
+                    new ArrayList<>(unicastLocalPrefixesToBeRemoved), linkProperty);
+        }
+    }
+
+    /**
+     * Filters IpPrefix that are local prefixes and LinkAddress is part of them.
+     * @param linkAddress link address used for filtering
+     * @return list of IpPrefix that are local addresses.
+     */
+    private List<IpPrefix> getLocalNetworkPrefixesForAddress(LinkAddress linkAddress) {
+        List<IpPrefix> localPrefixes = new ArrayList<>();
+        if (linkAddress.isIpv6()) {
+            // For IPv6, if the prefix length is greater than zero then they are part of local
+            // network
+            if (linkAddress.getPrefixLength() != 0) {
+                localPrefixes.add(
+                        new IpPrefix(linkAddress.getAddress(), linkAddress.getPrefixLength()));
+            }
+        } else {
+            // For IPv4, if the linkAddress is part of IpPrefix adding prefix to result.
+            for (IpPrefix ipv4LocalPrefix : IPV4_LOCAL_PREFIXES) {
+                if (ipv4LocalPrefix.containsPrefix(
+                        new IpPrefix(linkAddress.getAddress(), linkAddress.getPrefixLength()))) {
+                    localPrefixes.add(ipv4LocalPrefix);
+                }
+            }
+        }
+        return localPrefixes;
+    }
+
+    /**
+     * Adds list of prefixes(addresses) to local network access map.
+     * @param iface interface name
+     * @param prefixes list of prefixes/addresses
+     * @param lp LinkProperties
+     */
+    private void addLocalAddressesToBpfMap(final String iface, final List<IpPrefix> prefixes,
+                                           @Nullable final LinkProperties lp) {
+        if (!BpfNetMaps.isAtLeast25Q2()) return;
+
+        for (IpPrefix prefix : prefixes) {
+            // Add local dnses allow rule To BpfMap before adding the block rule for prefix
+            addLocalDnsesToBpfMap(iface, prefix, lp);
+            /*
+            Prefix length is used by LPM trie map(local_net_access_map) for performing longest
+            prefix matching, this length represents the maximum number of bits used for matching.
+            The interface index should always be matched which is 32-bit integer. For IPv6, prefix
+            length is calculated by adding the ip address prefix length along with interface index
+            making it (32 + length). IPv4 addresses are stored as ipv4-mapped-ipv6 which implies
+            first 96 bits are common for all ipv4 addresses. Hence, prefix length is calculated as
+            32(interface index) + 96 (common for ipv4-mapped-ipv6) + length.
+             */
+            final int prefixLengthConstant = (prefix.isIPv4() ? (32 + 96) : 32);
+            mBpfNetMaps.addLocalNetAccess(prefixLengthConstant + prefix.getPrefixLength(),
+                    iface, prefix.getAddress(), 0, 0, false);
+
+        }
+
+    }
+
+    /**
+     * Removes list of prefixes(addresses) from local network access map.
+     * @param iface interface name
+     * @param prefixes list of prefixes/addresses
+     * @param lp LinkProperties
+     */
+    private void removeLocalAddressesFromBpfMap(final String iface, final List<IpPrefix> prefixes,
+                                                @Nullable final LinkProperties lp) {
+        if (!BpfNetMaps.isAtLeast25Q2()) return;
+
+        for (IpPrefix prefix : prefixes) {
+            // The reasoning for prefix length is explained in addLocalAddressesToBpfMap()
+            final int prefixLengthConstant = (prefix.isIPv4() ? (32 + 96) : 32);
+            mBpfNetMaps.removeLocalNetAccess(prefixLengthConstant
+                    + prefix.getPrefixLength(), iface, prefix.getAddress(), 0, 0);
+
+            // Also remove the allow rule for dnses included in the prefix after removing the block
+            // rule for prefix.
+            removeLocalDnsesFromBpfMap(iface, prefix, lp);
+        }
+    }
+
+    /**
+     * Adds DNS servers to local network access map, if included in the interface prefix
+     * @param iface interface name
+     * @param prefix IpPrefix
+     * @param lp LinkProperties
+     */
+    private void addLocalDnsesToBpfMap(final String iface, IpPrefix prefix,
+            @Nullable final LinkProperties lp) {
+        if (!BpfNetMaps.isAtLeast25Q2() || lp == null) return;
+
+        for (InetAddress dnsServer : lp.getDnsServers()) {
+            // Adds dns allow rule to LocalNetAccessMap for both TCP and UDP protocol at port 53,
+            // if it is a local dns (ie. it falls in the local prefix range).
+            if (prefix.contains(dnsServer)) {
+                mBpfNetMaps.addLocalNetAccess(getIpv4MappedAddressBitLen(), iface, dnsServer,
+                        IPPROTO_UDP, 53, true);
+                mBpfNetMaps.addLocalNetAccess(getIpv4MappedAddressBitLen(), iface, dnsServer,
+                        IPPROTO_TCP, 53, true);
+            }
+        }
+    }
+
+    /**
+     * Removes DNS servers from local network access map, if included in the interface prefix
+     * @param iface interface name
+     * @param prefix IpPrefix
+     * @param lp LinkProperties
+     */
+    private void removeLocalDnsesFromBpfMap(final String iface, IpPrefix prefix,
+            @Nullable final LinkProperties lp) {
+        if (!BpfNetMaps.isAtLeast25Q2() || lp == null) return;
+
+        for (InetAddress dnsServer : lp.getDnsServers()) {
+            // Removes dns allow rule from LocalNetAccessMap for both TCP and UDP protocol
+            // at port 53, if it is a local dns (ie. it falls in the prefix range).
+            if (prefix.contains(dnsServer)) {
+                mBpfNetMaps.removeLocalNetAccess(getIpv4MappedAddressBitLen(), iface, dnsServer,
+                        IPPROTO_UDP, 53);
+                mBpfNetMaps.removeLocalNetAccess(getIpv4MappedAddressBitLen(), iface, dnsServer,
+                        IPPROTO_TCP, 53);
+            }
+        }
+    }
+
+    /**
+     * Returns total bit length of an Ipv4 mapped address.
+     */
+    private int getIpv4MappedAddressBitLen() {
+        final int ifaceLen = 32; // bit length of interface
+        final int inetAddressLen = 32 + 96; // length of ipv4 mapped addresses
+        final int portProtocolLen = 32;  //16 for port + 16 for protocol;
+        return ifaceLen + inetAddressLen + portProtocolLen;
+    }
+
+    /**
      * Have netd update routes from oldLp to newLp.
      * @return true if routes changed between oldLp and newLp
      */
@@ -10699,10 +10936,42 @@
         // else not handled
     }
 
+    /**
+     * A small class to manage releasing a lock exactly once even if releaseLock is called
+     * multiple times. See b/390043283
+     * PendingIntent#send throws CanceledException in various cases. In some of them it will
+     * still call onSendFinished, in others it won't and the client can't know. This class
+     * keeps a ref to the wakelock that it releases exactly once, thanks to Atomics semantics.
+     */
+    private class WakeLockOnFinishedReceiver implements PendingIntent.OnFinished {
+        private final AtomicReference<PowerManager.WakeLock> mLock;
+        WakeLockOnFinishedReceiver(@NonNull final PowerManager.WakeLock lock) {
+            mLock = new AtomicReference<>(lock);
+            lock.acquire();
+        }
+
+        public void releaseLock() {
+            final PowerManager.WakeLock lock = mLock.getAndSet(null);
+            if (null != lock) lock.release();
+        }
+
+        @Override
+        public void onSendFinished(PendingIntent pendingIntent, Intent intent, int resultCode,
+                String resultData, Bundle resultExtras) {
+            if (DBG) log("Finished sending " + pendingIntent);
+            releaseLock();
+            releasePendingNetworkRequestWithDelay(pendingIntent);
+        }
+    }
+
     // TODO(b/193460475): Remove when tooling supports SystemApi to public API.
     @SuppressLint("NewApi")
     private void sendIntent(PendingIntent pendingIntent, Intent intent) {
-        mPendingIntentWakeLock.acquire();
+        // Since the receiver will take the lock exactly once and release it exactly once, it
+        // is safe to pass the same wakelock to all receivers and avoid creating a new lock
+        // every time.
+        final WakeLockOnFinishedReceiver receiver =
+                new WakeLockOnFinishedReceiver(mPendingIntentWakeLock);
         try {
             if (DBG) log("Sending " + pendingIntent);
             final BroadcastOptions options = BroadcastOptions.makeBasic();
@@ -10711,25 +10980,14 @@
                 // utilizing the PendingIntent as a backdoor to do this.
                 options.setPendingIntentBackgroundActivityLaunchAllowed(false);
             }
-            pendingIntent.send(mContext, 0, intent, this /* onFinished */, null /* Handler */,
+            pendingIntent.send(mContext, 0, intent, receiver, null /* Handler */,
                     null /* requiredPermission */,
                     mDeps.isAtLeastT() ? options.toBundle() : null);
         } catch (PendingIntent.CanceledException e) {
             if (DBG) log(pendingIntent + " was not sent, it had been canceled.");
-            mPendingIntentWakeLock.release();
+            receiver.releaseLock();
             releasePendingNetworkRequest(pendingIntent);
         }
-        // ...otherwise, mPendingIntentWakeLock.release() gets called by onSendFinished()
-    }
-
-    @Override
-    public void onSendFinished(PendingIntent pendingIntent, Intent intent, int resultCode,
-            String resultData, Bundle resultExtras) {
-        if (DBG) log("Finished sending " + pendingIntent);
-        mPendingIntentWakeLock.release();
-        // Release with a delay so the receiving client has an opportunity to put in its
-        // own request.
-        releasePendingNetworkRequestWithDelay(pendingIntent);
     }
 
     @Nullable
@@ -11790,7 +12048,7 @@
             // interfaces and routing rules have been added, DNS servers programmed, etc.
             // For VPNs, this must be done before the capabilities are updated, because as soon as
             // that happens, UIDs are routed to the network.
-            if (shouldCreateNetworksImmediately()) {
+            if (shouldCreateNetworksImmediately(networkAgent.getCapsNoCopy())) {
                 applyInitialLinkProperties(networkAgent);
             }
 
@@ -11815,7 +12073,7 @@
             networkAgent.getAndSetNetworkCapabilities(networkAgent.networkCapabilities);
 
             handlePerNetworkPrivateDnsConfig(networkAgent, mDnsManager.getPrivateDnsConfig());
-            if (!shouldCreateNetworksImmediately()) {
+            if (!shouldCreateNetworksImmediately(networkAgent.getCapsNoCopy())) {
                 applyInitialLinkProperties(networkAgent);
             } else {
                 // The network was created when the agent registered, and the LinkProperties are
diff --git a/service/src/com/android/server/L2capNetworkProvider.java b/service/src/com/android/server/L2capNetworkProvider.java
index 15c860b..0352ad5 100644
--- a/service/src/com/android/server/L2capNetworkProvider.java
+++ b/service/src/com/android/server/L2capNetworkProvider.java
@@ -16,9 +16,9 @@
 
 package com.android.server;
 
-import static android.net.L2capNetworkSpecifier.HEADER_COMPRESSION_6LOWPAN;
+import static android.content.pm.PackageManager.FEATURE_BLUETOOTH_LE;
 import static android.net.L2capNetworkSpecifier.HEADER_COMPRESSION_ANY;
-import static android.net.L2capNetworkSpecifier.PSM_ANY;
+import static android.net.L2capNetworkSpecifier.ROLE_CLIENT;
 import static android.net.L2capNetworkSpecifier.ROLE_SERVER;
 import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_BANDWIDTH_CONSTRAINED;
 import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_CONGESTED;
@@ -29,13 +29,13 @@
 import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_VPN;
 import static android.net.NetworkCapabilities.RES_ID_MATCH_ALL_RESERVATIONS;
 import static android.net.NetworkCapabilities.TRANSPORT_BLUETOOTH;
-import static android.content.pm.PackageManager.FEATURE_BLUETOOTH_LE;
 import static android.system.OsConstants.F_GETFL;
 import static android.system.OsConstants.F_SETFL;
 import static android.system.OsConstants.O_NONBLOCK;
 
 import android.annotation.Nullable;
 import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothDevice;
 import android.bluetooth.BluetoothManager;
 import android.bluetooth.BluetoothServerSocket;
 import android.bluetooth.BluetoothSocket;
@@ -48,20 +48,25 @@
 import android.net.NetworkProvider.NetworkOfferCallback;
 import android.net.NetworkRequest;
 import android.net.NetworkScore;
-import android.net.NetworkSpecifier;
 import android.os.Handler;
 import android.os.HandlerThread;
-import android.os.Looper;
 import android.os.ParcelFileDescriptor;
 import android.system.Os;
+import android.util.ArrayMap;
 import android.util.ArraySet;
 import android.util.Log;
 
 import com.android.internal.annotations.VisibleForTesting;
+import com.android.net.module.util.HandlerUtils;
 import com.android.net.module.util.ServiceConnectivityJni;
 import com.android.server.net.L2capNetwork;
+import com.android.server.net.L2capNetwork.L2capIpClient;
+import com.android.server.net.L2capPacketForwarder;
 
 import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
 import java.util.Set;
 
 
@@ -72,7 +77,6 @@
             // BLUETOOTH_CONNECT permission.
             NetworkCapabilities.Builder.withoutDefaultCapabilities()
                     .addTransportType(TRANSPORT_BLUETOOTH)
-                    // TODO: remove NET_CAPABILITY_NOT_BANDWIDTH_CONSTRAINED.
                     .addCapability(NET_CAPABILITY_NOT_BANDWIDTH_CONSTRAINED)
                     .addCapability(NET_CAPABILITY_NOT_CONGESTED)
                     .addCapability(NET_CAPABILITY_NOT_METERED)
@@ -88,6 +92,7 @@
     private final NetworkProvider mProvider;
     private final BlanketReservationOffer mBlanketOffer;
     private final Set<ReservedServerOffer> mReservedServerOffers = new ArraySet<>();
+    private final ClientOffer mClientOffer;
     // mBluetoothManager guaranteed non-null when read on handler thread after start() is called
     @Nullable
     private BluetoothManager mBluetoothManager;
@@ -104,12 +109,7 @@
      * requests that do not have a NetworkSpecifier set.
      */
     private class BlanketReservationOffer implements NetworkOfferCallback {
-        // Set as transport primary to ensure that the BlanketReservationOffer always outscores the
-        // ReservedServerOffer, because as soon as the BlanketReservationOffer receives an
-        // onNetworkUnneeded() callback, it will tear down the associated reserved offer.
-        public static final NetworkScore SCORE = new NetworkScore.Builder()
-                .setTransportPrimary(true)
-                .build();
+        public static final NetworkScore SCORE = new NetworkScore.Builder().build();
         // Note the missing NET_CAPABILITY_NOT_RESTRICTED marking the network as restricted.
         public static final NetworkCapabilities CAPABILITIES;
         static {
@@ -126,33 +126,15 @@
             CAPABILITIES = caps;
         }
 
-        // TODO: consider moving this into L2capNetworkSpecifier as #isValidServerReservation().
-        private boolean isValidL2capSpecifier(@Nullable NetworkSpecifier spec) {
-            if (spec == null) return false;
-            // If spec is not null, L2capNetworkSpecifier#canBeSatisfiedBy() guarantees the
-            // specifier is of type L2capNetworkSpecifier.
-            final L2capNetworkSpecifier l2capSpec = (L2capNetworkSpecifier) spec;
-
-            // The ROLE_SERVER offer can be satisfied by a ROLE_ANY request.
-            if (l2capSpec.getRole() != ROLE_SERVER) return false;
-
-            // HEADER_COMPRESSION_ANY is never valid in a request.
-            if (l2capSpec.getHeaderCompression() == HEADER_COMPRESSION_ANY) return false;
-
-            // remoteAddr must be null for ROLE_SERVER requests.
-            if (l2capSpec.getRemoteAddress() != null) return false;
-
-            // reservation must allocate a PSM, so only PSM_ANY can be passed.
-            if (l2capSpec.getPsm() != PSM_ANY) return false;
-
-            return true;
-        }
-
         @Override
         public void onNetworkNeeded(NetworkRequest request) {
-            Log.d(TAG, "New reservation request: " + request);
-            if (!isValidL2capSpecifier(request.getNetworkSpecifier())) {
-                Log.w(TAG, "Ignoring invalid reservation request: " + request);
+            // The NetworkSpecifier is guaranteed to be either null or an L2capNetworkSpecifier, so
+            // this cast is safe.
+            final L2capNetworkSpecifier specifier =
+                    (L2capNetworkSpecifier) request.getNetworkSpecifier();
+            if (specifier == null) return;
+            if (!specifier.isValidServerReservationSpecifier()) {
+                Log.i(TAG, "Ignoring invalid reservation request: " + request);
                 return;
             }
 
@@ -228,6 +210,7 @@
     }
 
     private void destroyAndUnregisterReservedOffer(ReservedServerOffer reservedOffer) {
+        HandlerUtils.ensureRunningOnHandlerThread(mHandler);
         // Ensure the offer still exists if this was posted on the handler.
         if (!mReservedServerOffers.contains(reservedOffer)) return;
         mReservedServerOffers.remove(reservedOffer);
@@ -237,48 +220,137 @@
     }
 
     @Nullable
-    private static ParcelFileDescriptor createTunInterface(String ifname) {
-        final ParcelFileDescriptor fd;
-        try {
-            fd = ParcelFileDescriptor.adoptFd(
-                    ServiceConnectivityJni.createTunTap(
-                            true /*isTun*/, true /*hasCarrier*/, true /*setIffMulticast*/, ifname));
-            ServiceConnectivityJni.bringUpInterface(ifname);
-            // TODO: consider adding a parameter to createTunTap() (or the Builder that should
-            // be added) to configure i/o blocking.
-            final int flags = Os.fcntlInt(fd.getFileDescriptor(), F_GETFL, 0);
-            Os.fcntlInt(fd.getFileDescriptor(), F_SETFL, flags & ~O_NONBLOCK);
-        } catch (Exception e) {
-            // Note: createTunTap currently throws an IllegalStateException on failure.
-            // TODO: native functions should throw ErrnoException.
-            Log.e(TAG, "Failed to create tun interface", e);
-            return null;
-        }
-        return fd;
-    }
-
-    @Nullable
     private L2capNetwork createL2capNetwork(BluetoothSocket socket, NetworkCapabilities caps,
             L2capNetwork.ICallback cb) {
+        HandlerUtils.ensureRunningOnHandlerThread(mHandler);
         final String ifname = TUN_IFNAME + String.valueOf(sTunIndex++);
-        final ParcelFileDescriptor tunFd = createTunInterface(ifname);
+        final ParcelFileDescriptor tunFd = mDeps.createTunInterface(ifname);
         if (tunFd == null) {
             return null;
         }
 
-        return new L2capNetwork(mHandler, mContext, mProvider, ifname, socket, tunFd, caps, cb);
+        return L2capNetwork.create(
+                mHandler, mContext, mProvider, ifname, socket, tunFd, caps, mDeps, cb);
     }
 
+    private static void closeBluetoothSocket(BluetoothSocket socket) {
+        try {
+            socket.close();
+        } catch (IOException e) {
+            Log.w(TAG, "Failed to close BluetoothSocket", e);
+        }
+    }
 
     private class ReservedServerOffer implements NetworkOfferCallback {
         private final NetworkCapabilities mReservedCapabilities;
-        private final BluetoothServerSocket mServerSocket;
+        private final AcceptThread mAcceptThread;
+        // This set should almost always contain at most one network. This is because all L2CAP
+        // server networks created by the same reserved offer are indistinguishable from each other,
+        // so that ConnectivityService will tear down all but the first. However, temporarily, there
+        // can be more than one network.
+        private final Set<L2capNetwork> mL2capNetworks = new ArraySet<>();
+
+        private class AcceptThread extends Thread {
+            private static final int TIMEOUT_MS = 500;
+            private final BluetoothServerSocket mServerSocket;
+
+            public AcceptThread(BluetoothServerSocket serverSocket) {
+                super("L2capNetworkProvider-AcceptThread");
+                mServerSocket = serverSocket;
+            }
+
+            private void postDestroyAndUnregisterReservedOffer() {
+                // Called on AcceptThread
+                mHandler.post(() -> {
+                    destroyAndUnregisterReservedOffer(ReservedServerOffer.this);
+                });
+            }
+
+            private void postCreateServerNetwork(BluetoothSocket connectedSocket) {
+                // Called on AcceptThread
+                mHandler.post(() -> {
+                    final boolean success = createServerNetwork(connectedSocket);
+                    if (!success) closeBluetoothSocket(connectedSocket);
+                });
+            }
+
+            @Override
+            public void run() {
+                while (true) {
+                    final BluetoothSocket connectedSocket;
+                    try {
+                        connectedSocket = mServerSocket.accept();
+                    } catch (IOException e) {
+                        // Note calling BluetoothServerSocket#close() also triggers an IOException
+                        // which is indistinguishable from any other exceptional behavior.
+                        // postDestroyAndUnregisterReservedOffer() is always safe to call as it
+                        // first checks whether the offer still exists; so if the
+                        // BluetoothServerSocket was closed (i.e. on tearDown()) this is a noop.
+                        Log.w(TAG, "BluetoothServerSocket closed or #accept failed", e);
+                        postDestroyAndUnregisterReservedOffer();
+                        return; // stop running immediately on error
+                    }
+                    postCreateServerNetwork(connectedSocket);
+                }
+            }
+
+            public void tearDown() {
+                HandlerUtils.ensureRunningOnHandlerThread(mHandler);
+                try {
+                    // BluetoothServerSocket.close() is thread-safe.
+                    mServerSocket.close();
+                } catch (IOException e) {
+                    Log.w(TAG, "Failed to close BluetoothServerSocket", e);
+                }
+                try {
+                    join();
+                } catch (InterruptedException e) {
+                    // join() interrupted during tearDown(). Do nothing.
+                }
+            }
+        }
+
+        private boolean createServerNetwork(BluetoothSocket socket) {
+            HandlerUtils.ensureRunningOnHandlerThread(mHandler);
+            // It is possible the offer went away.
+            if (!mReservedServerOffers.contains(this)) return false;
+
+            if (!socket.isConnected()) {
+                Log.wtf(TAG, "BluetoothSocket must be connected");
+                return false;
+            }
+
+            final L2capNetwork network = createL2capNetwork(socket, mReservedCapabilities,
+                    new L2capNetwork.ICallback() {
+                    @Override
+                    public void onError(L2capNetwork network) {
+                        HandlerUtils.ensureRunningOnHandlerThread(mHandler);
+                        destroyAndUnregisterReservedOffer(ReservedServerOffer.this);
+                    }
+                    @Override
+                    public void onNetworkUnwanted(L2capNetwork network) {
+                        HandlerUtils.ensureRunningOnHandlerThread(mHandler);
+                        // Leave reservation in place.
+                        final boolean networkExists = mL2capNetworks.remove(network);
+                        if (!networkExists) return; // already torn down.
+                        network.tearDown();
+                    }
+            });
+
+            if (network == null) {
+                Log.e(TAG, "Failed to create L2capNetwork");
+                return false;
+            }
+
+            mL2capNetworks.add(network);
+            return true;
+        }
 
         public ReservedServerOffer(NetworkCapabilities reservedCapabilities,
                 BluetoothServerSocket serverSocket) {
             mReservedCapabilities = reservedCapabilities;
-            // TODO: ServerSocket will be managed by an AcceptThread.
-            mServerSocket = serverSocket;
+            mAcceptThread = new AcceptThread(serverSocket);
+            mAcceptThread.start();
         }
 
         public NetworkCapabilities getReservedCapabilities() {
@@ -287,55 +359,309 @@
 
         @Override
         public void onNetworkNeeded(NetworkRequest request) {
-            // TODO: implement
+            // UNUSED: the lifetime of the reserved network is controlled by the blanket offer.
         }
 
         @Override
         public void onNetworkUnneeded(NetworkRequest request) {
-            // TODO: implement
+            // UNUSED: the lifetime of the reserved network is controlled by the blanket offer.
+        }
+
+        /** Called when the reservation goes away and the reserved offer must be torn down. */
+        public void tearDown() {
+            HandlerUtils.ensureRunningOnHandlerThread(mHandler);
+            mAcceptThread.tearDown();
+            for (L2capNetwork network : mL2capNetworks) {
+                network.tearDown();
+            }
+        }
+    }
+
+    private class ClientOffer implements NetworkOfferCallback {
+        public static final NetworkScore SCORE = new NetworkScore.Builder().build();
+        public static final NetworkCapabilities CAPABILITIES;
+        static {
+            // Below capabilities will match any request with an L2capNetworkSpecifier
+            // that specifies ROLE_CLIENT or without a NetworkSpecifier.
+            final L2capNetworkSpecifier l2capNetworkSpecifier = new L2capNetworkSpecifier.Builder()
+                    .setRole(ROLE_CLIENT)
+                    .build();
+            CAPABILITIES = new NetworkCapabilities.Builder(COMMON_CAPABILITIES)
+                    .setNetworkSpecifier(l2capNetworkSpecifier)
+                    .build();
+        }
+
+        private final Map<L2capNetworkSpecifier, ClientRequestInfo> mClientNetworkRequests =
+                new ArrayMap<>();
+
+        /**
+         * State object to store information for client NetworkRequests.
+         */
+        private static class ClientRequestInfo {
+            public final L2capNetworkSpecifier specifier;
+            public final List<NetworkRequest> requests = new ArrayList<>();
+            // TODO: add support for retries.
+            public final ConnectThread connectThread;
+            @Nullable
+            public L2capNetwork network;
+
+            public ClientRequestInfo(NetworkRequest request, ConnectThread connectThread) {
+                this.specifier = (L2capNetworkSpecifier) request.getNetworkSpecifier();
+                this.requests.add(request);
+                this.connectThread = connectThread;
+            }
+        }
+
+        // TODO: consider using ExecutorService
+        private class ConnectThread extends Thread {
+            private final L2capNetworkSpecifier mSpecifier;
+            private final BluetoothSocket mSocket;
+
+            public ConnectThread(L2capNetworkSpecifier specifier, BluetoothSocket socket) {
+                super("L2capNetworkProvider-ConnectThread");
+                mSpecifier = specifier;
+                mSocket = socket;
+            }
+
+            @Override
+            public void run() {
+                try {
+                    mSocket.connect();
+                    mHandler.post(() -> {
+                        final boolean success = createClientNetwork(mSpecifier, mSocket);
+                        if (!success) closeBluetoothSocket(mSocket);
+                    });
+                } catch (IOException e) {
+                    Log.w(TAG, "BluetoothSocket was closed or #connect failed", e);
+                    // It is safe to call BluetoothSocket#close() multiple times.
+                    closeBluetoothSocket(mSocket);
+                    mHandler.post(() -> {
+                        // Note that if the Socket was closed, this call is a noop as the
+                        // ClientNetworkRequest has already been removed.
+                        declareAllNetworkRequestsUnfulfillable(mSpecifier);
+                    });
+                }
+            }
+
+            public void abort() {
+                HandlerUtils.ensureRunningOnHandlerThread(mHandler);
+                // Closing the BluetoothSocket is the only way to unblock connect() because it calls
+                // shutdown on the underlying (connected) SOCK_SEQPACKET.
+                // It is safe to call BluetoothSocket#close() multiple times.
+                closeBluetoothSocket(mSocket);
+                try {
+                    join();
+                } catch (InterruptedException e) {
+                    Log.i(TAG, "Interrupted while joining ConnectThread", e);
+                }
+            }
+        }
+
+        private boolean createClientNetwork(L2capNetworkSpecifier specifier,
+                BluetoothSocket socket) {
+            HandlerUtils.ensureRunningOnHandlerThread(mHandler);
+            // Check whether request still exists
+            final ClientRequestInfo cri = mClientNetworkRequests.get(specifier);
+            if (cri == null) return false;
+
+            final NetworkCapabilities caps = new NetworkCapabilities.Builder(CAPABILITIES)
+                    .setNetworkSpecifier(specifier)
+                    .build();
+
+            final L2capNetwork network = createL2capNetwork(socket, caps,
+                    new L2capNetwork.ICallback() {
+                    // TODO: do not send onUnavailable() after the network has become available. The
+                    // right thing to do here is to tearDown the network (if it still exists,
+                    // because note that the request might have already been removed in the
+                    // meantime, so `network` cannot be used directly.
+                    @Override
+                    public void onError(L2capNetwork network) {
+                        HandlerUtils.ensureRunningOnHandlerThread(mHandler);
+                        declareAllNetworkRequestsUnfulfillable(specifier);
+                    }
+                    @Override
+                    public void onNetworkUnwanted(L2capNetwork network) {
+                        HandlerUtils.ensureRunningOnHandlerThread(mHandler);
+                        declareAllNetworkRequestsUnfulfillable(specifier);
+                    }
+            });
+            if (network == null) return false;
+
+            cri.network = network;
+            return true;
+        }
+
+        @Override
+        public void onNetworkNeeded(NetworkRequest request) {
+            // The NetworkSpecifier is guaranteed to be either null or an L2capNetworkSpecifier, so
+            // this cast is safe.
+            final L2capNetworkSpecifier requestSpecifier =
+                    (L2capNetworkSpecifier) request.getNetworkSpecifier();
+            if (requestSpecifier == null) return;
+            if (!requestSpecifier.isValidClientRequestSpecifier()) {
+                Log.i(TAG, "Ignoring invalid client request: " + request);
+                return;
+            }
+
+             // Check whether this exact request is already being tracked.
+            final ClientRequestInfo cri = mClientNetworkRequests.get(requestSpecifier);
+            if (cri != null) {
+                Log.d(TAG, "The request is already being tracked. NetworkRequest: " + request);
+                cri.requests.add(request);
+                return;
+            }
+
+            // Check whether a fuzzy match shows a mismatch in header compression by calling
+            // canBeSatisfiedBy().
+            // TODO: Add a copy constructor to L2capNetworkSpecifier.Builder.
+            final L2capNetworkSpecifier matchAnyHeaderCompressionSpecifier =
+                    new L2capNetworkSpecifier.Builder()
+                            .setRole(requestSpecifier.getRole())
+                            .setRemoteAddress(requestSpecifier.getRemoteAddress())
+                            .setPsm(requestSpecifier.getPsm())
+                            .setHeaderCompression(HEADER_COMPRESSION_ANY)
+                            .build();
+            for (L2capNetworkSpecifier existingSpecifier : mClientNetworkRequests.keySet()) {
+                if (existingSpecifier.canBeSatisfiedBy(matchAnyHeaderCompressionSpecifier)) {
+                    // This requeset can never be serviced as this network already exists with a
+                    // different header compression mechanism.
+                    mProvider.declareNetworkRequestUnfulfillable(request);
+                    return;
+                }
+            }
+
+            // If the code reaches here, this is a new request.
+            final BluetoothAdapter bluetoothAdapter = mBluetoothManager.getAdapter();
+            if (bluetoothAdapter == null) {
+                Log.w(TAG, "Failed to get BluetoothAdapter");
+                mProvider.declareNetworkRequestUnfulfillable(request);
+                return;
+            }
+
+            final byte[] macAddress = requestSpecifier.getRemoteAddress().toByteArray();
+            final BluetoothDevice bluetoothDevice = bluetoothAdapter.getRemoteDevice(macAddress);
+            final BluetoothSocket socket;
+            try {
+                socket = bluetoothDevice.createInsecureL2capChannel(requestSpecifier.getPsm());
+            } catch (IOException e) {
+                Log.w(TAG, "Failed to createInsecureL2capChannel", e);
+                mProvider.declareNetworkRequestUnfulfillable(request);
+                return;
+            }
+
+            final ConnectThread connectThread = new ConnectThread(requestSpecifier, socket);
+            connectThread.start();
+            final ClientRequestInfo newRequestInfo = new ClientRequestInfo(request, connectThread);
+            mClientNetworkRequests.put(requestSpecifier, newRequestInfo);
+        }
+
+        @Override
+        public void onNetworkUnneeded(NetworkRequest request) {
+            final L2capNetworkSpecifier specifier =
+                    (L2capNetworkSpecifier) request.getNetworkSpecifier();
+
+            // Map#get() is safe to call with null key
+            final ClientRequestInfo cri = mClientNetworkRequests.get(specifier);
+            if (cri == null) return;
+
+            cri.requests.remove(request);
+            if (cri.requests.size() > 0) return;
+
+            // If the code reaches here, the network needs to be torn down.
+            releaseClientNetworkRequest(cri);
         }
 
         /**
-         * Called when the reservation goes away and the reserved offer must be torn down.
+         * Release the client network request and tear down all associated state.
          *
-         * This method can be called multiple times.
+         * Only call this when all associated NetworkRequests have been released.
          */
-        public void tearDown() {
-            try {
-                mServerSocket.close();
-            } catch (IOException e) {
-                Log.w(TAG, "Failed to close BluetoothServerSocket", e);
+        private void releaseClientNetworkRequest(ClientRequestInfo cri) {
+            HandlerUtils.ensureRunningOnHandlerThread(mHandler);
+            mClientNetworkRequests.remove(cri.specifier);
+            if (cri.connectThread.isAlive()) {
+                // Note that if ConnectThread succeeds between calling #isAlive() and #abort(), the
+                // request will already be removed from mClientNetworkRequests by the time the
+                // createClientNetwork() call is processed on the handler, so it is safe to call
+                // #abort().
+                cri.connectThread.abort();
             }
+
+            if (cri.network != null) {
+                cri.network.tearDown();
+            }
+        }
+
+        private void declareAllNetworkRequestsUnfulfillable(L2capNetworkSpecifier specifier) {
+            HandlerUtils.ensureRunningOnHandlerThread(mHandler);
+            final ClientRequestInfo cri = mClientNetworkRequests.get(specifier);
+            if (cri == null) return;
+
+            for (NetworkRequest request : cri.requests) {
+                mProvider.declareNetworkRequestUnfulfillable(request);
+            }
+            releaseClientNetworkRequest(cri);
         }
     }
 
     @VisibleForTesting
     public static class Dependencies {
-        /** Get NetworkProvider */
-        public NetworkProvider getNetworkProvider(Context context, Looper looper) {
-            return new NetworkProvider(context, looper, TAG);
-        }
-
         /** Get the HandlerThread for L2capNetworkProvider to run on */
         public HandlerThread getHandlerThread() {
             final HandlerThread thread = new HandlerThread("L2capNetworkProviderThread");
             thread.start();
             return thread;
         }
+
+        /** Create a tun interface configured for blocking i/o */
+        @Nullable
+        public ParcelFileDescriptor createTunInterface(String ifname) {
+            final ParcelFileDescriptor fd;
+            try {
+                fd = ParcelFileDescriptor.adoptFd(ServiceConnectivityJni.createTunTap(
+                        true /*isTun*/,
+                        true /*hasCarrier*/,
+                        true /*setIffMulticast*/,
+                        ifname));
+                ServiceConnectivityJni.bringUpInterface(ifname);
+                // TODO: consider adding a parameter to createTunTap() (or the Builder that should
+                // be added) to configure i/o blocking.
+                final int flags = Os.fcntlInt(fd.getFileDescriptor(), F_GETFL, 0);
+                Os.fcntlInt(fd.getFileDescriptor(), F_SETFL, flags & ~O_NONBLOCK);
+            } catch (Exception e) {
+                // Note: createTunTap currently throws an IllegalStateException on failure.
+                // TODO: native functions should throw ErrnoException.
+                Log.e(TAG, "Failed to create tun interface", e);
+                return null;
+            }
+            return fd;
+        }
+
+        /** Create an L2capPacketForwarder and start forwarding */
+        public L2capPacketForwarder createL2capPacketForwarder(Handler handler,
+                ParcelFileDescriptor tunFd, BluetoothSocket socket, boolean compressHeaders,
+                L2capPacketForwarder.ICallback cb) {
+            return new L2capPacketForwarder(handler, tunFd, socket, compressHeaders, cb);
+        }
+
+        /** Create an L2capIpClient */
+        public L2capIpClient createL2capIpClient(String logTag, Context context, String ifname) {
+            return new L2capIpClient(logTag, context, ifname);
+        }
     }
 
     public L2capNetworkProvider(Context context) {
         this(new Dependencies(), context);
     }
 
-    @VisibleForTesting
     public L2capNetworkProvider(Dependencies deps, Context context) {
         mDeps = deps;
         mContext = context;
         mHandlerThread = mDeps.getHandlerThread();
         mHandler = new Handler(mHandlerThread.getLooper());
-        mProvider = mDeps.getNetworkProvider(context, mHandlerThread.getLooper());
+        mProvider = new NetworkProvider(context, mHandlerThread.getLooper(), TAG);
         mBlanketOffer = new BlanketReservationOffer();
+        mClientOffer = new ClientOffer();
     }
 
     /**
@@ -358,6 +684,8 @@
             mContext.getSystemService(ConnectivityManager.class).registerNetworkProvider(mProvider);
             mProvider.registerNetworkOffer(BlanketReservationOffer.SCORE,
                     BlanketReservationOffer.CAPABILITIES, mHandler::post, mBlanketOffer);
+            mProvider.registerNetworkOffer(ClientOffer.SCORE,
+                    ClientOffer.CAPABILITIES, mHandler::post, mClientOffer);
         });
     }
 }
diff --git a/service/src/com/android/server/connectivity/MulticastRoutingCoordinatorService.java b/service/src/com/android/server/connectivity/MulticastRoutingCoordinatorService.java
index af4aee5..c4de80f 100644
--- a/service/src/com/android/server/connectivity/MulticastRoutingCoordinatorService.java
+++ b/service/src/com/android/server/connectivity/MulticastRoutingCoordinatorService.java
@@ -21,6 +21,7 @@
 import static android.net.MulticastRoutingConfig.FORWARD_WITH_MIN_SCOPE;
 import static android.system.OsConstants.AF_INET6;
 import static android.system.OsConstants.EADDRINUSE;
+import static android.system.OsConstants.EADDRNOTAVAIL;
 import static android.system.OsConstants.IPPROTO_ICMPV6;
 import static android.system.OsConstants.IPPROTO_IPV6;
 import static android.system.OsConstants.SOCK_CLOEXEC;
@@ -258,6 +259,10 @@
             mDependencies.setsockoptMrt6DelMif(mMulticastRoutingFd, virtualIndex);
             Log.d(TAG, "Removed mifi " + virtualIndex + " from MIF");
         } catch (ErrnoException e) {
+            if (e.errno == EADDRNOTAVAIL) {
+                Log.w(TAG, "multicast virtual interface " + virtualIndex + " already removed", e);
+                return;
+            }
             Log.e(TAG, "failed to remove multicast virtual interface" + virtualIndex, e);
         }
     }
diff --git a/service/src/com/android/server/connectivity/NetworkPermissions.java b/service/src/com/android/server/connectivity/NetworkPermissions.java
new file mode 100644
index 0000000..9543d8f
--- /dev/null
+++ b/service/src/com/android/server/connectivity/NetworkPermissions.java
@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) 2025 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.server.connectivity;
+
+import android.net.INetd;
+
+/**
+ * A wrapper class for managing network and traffic permissions.
+ *
+ * This class encapsulates permissions represented as a bitmask, as defined in INetd.aidl
+ * and used within PermissionMonitor.java.  It distinguishes between two types of permissions:
+ *
+ * 1. Network Permissions: These permissions, declared in INetd.aidl, are used
+ *    by the Android platform's network daemon (system/netd) to control network
+ *    management
+ *
+ * 2. Traffic Permissions: These permissions are used internally by PermissionMonitor.java and
+ *    BpfNetMaps.java to manage fine-grained network traffic filtering and control.
+ *
+ * This wrapper ensures that no new permission definitions, here or in aidl, conflict with any
+ * existing permissions. This prevents unintended interactions or overrides.
+ *
+ * @hide
+ */
+public class NetworkPermissions {
+
+    /*
+     * Below are network permissions declared in INetd.aidl and used by the platform. Using these is
+     * equivalent to using the values in android.net.INetd.
+     */
+    public static final int PERMISSION_NONE = INetd.PERMISSION_NONE; /* 0 */
+    public static final int PERMISSION_NETWORK = INetd.PERMISSION_NETWORK; /* 1 */
+    public static final int PERMISSION_SYSTEM = INetd.PERMISSION_SYSTEM; /* 2 */
+
+    /*
+     * Below are traffic permissions used by PermissionMonitor and BpfNetMaps.
+     */
+
+    /**
+     * PERMISSION_UNINSTALLED is used when an app is uninstalled from the device. All internet
+     * related permissions need to be cleaned.
+     */
+    public static final int TRAFFIC_PERMISSION_UNINSTALLED = -1;
+
+    /**
+     * PERMISSION_INTERNET indicates that the app can create AF_INET and AF_INET6 sockets.
+     */
+    public static final int TRAFFIC_PERMISSION_INTERNET = 4;
+
+    /**
+     * PERMISSION_UPDATE_DEVICE_STATS is used for system UIDs and privileged apps
+     * that have the UPDATE_DEVICE_STATS permission.
+     */
+    public static final int TRAFFIC_PERMISSION_UPDATE_DEVICE_STATS = 8;
+
+    /**
+     * TRAFFIC_PERMISSION_SDKSANDBOX_LOCALHOST indicates if an SdkSandbox UID will be allowed
+     * to connect to localhost. For non SdkSandbox UIDs this bit is a no-op.
+     */
+    public static final int TRAFFIC_PERMISSION_SDKSANDBOX_LOCALHOST = 16;
+}
diff --git a/service/src/com/android/server/connectivity/PermissionMonitor.java b/service/src/com/android/server/connectivity/PermissionMonitor.java
index 0d388e8..5de5f61 100755
--- a/service/src/com/android/server/connectivity/PermissionMonitor.java
+++ b/service/src/com/android/server/connectivity/PermissionMonitor.java
@@ -19,27 +19,29 @@
 import static android.Manifest.permission.CHANGE_NETWORK_STATE;
 import static android.Manifest.permission.CONNECTIVITY_USE_RESTRICTED_NETWORKS;
 import static android.Manifest.permission.INTERNET;
+import static android.Manifest.permission.NEARBY_WIFI_DEVICES;
 import static android.Manifest.permission.NETWORK_STACK;
 import static android.Manifest.permission.UPDATE_DEVICE_STATS;
 import static android.content.pm.PackageInfo.REQUESTED_PERMISSION_GRANTED;
 import static android.content.pm.PackageManager.GET_PERMISSIONS;
 import static android.net.ConnectivitySettingsManager.UIDS_ALLOWED_ON_RESTRICTED_NETWORKS;
-import static android.net.INetd.PERMISSION_INTERNET;
-import static android.net.INetd.PERMISSION_NETWORK;
-import static android.net.INetd.PERMISSION_NONE;
-import static android.net.INetd.PERMISSION_SYSTEM;
-import static android.net.INetd.PERMISSION_UNINSTALLED;
-import static android.net.INetd.PERMISSION_UPDATE_DEVICE_STATS;
 import static android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK;
 import static android.net.connectivity.ConnectivityCompatChanges.RESTRICT_LOCAL_NETWORK;
 import static android.os.Process.INVALID_UID;
 import static android.os.Process.SYSTEM_UID;
 
+import static com.android.server.connectivity.NetworkPermissions.PERMISSION_NETWORK;
+import static com.android.server.connectivity.NetworkPermissions.PERMISSION_NONE;
+import static com.android.server.connectivity.NetworkPermissions.PERMISSION_SYSTEM;
+import static com.android.server.connectivity.NetworkPermissions.TRAFFIC_PERMISSION_INTERNET;
+import static com.android.server.connectivity.NetworkPermissions.TRAFFIC_PERMISSION_UNINSTALLED;
+import static com.android.server.connectivity.NetworkPermissions.TRAFFIC_PERMISSION_UPDATE_DEVICE_STATS;
 import static com.android.net.module.util.CollectionUtils.toIntArray;
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.app.compat.CompatChanges;
+import android.content.AttributionSource;
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
@@ -62,6 +64,7 @@
 import android.os.SystemConfigManager;
 import android.os.UserHandle;
 import android.os.UserManager;
+import android.permission.PermissionManager;
 import android.provider.Settings;
 import android.util.ArrayMap;
 import android.util.ArraySet;
@@ -72,7 +75,6 @@
 import com.android.internal.annotations.VisibleForTesting;
 import com.android.internal.util.IndentingPrintWriter;
 import com.android.modules.utils.build.SdkLevel;
-import com.android.net.flags.Flags;
 import com.android.net.module.util.CollectionUtils;
 import com.android.net.module.util.SharedLog;
 import com.android.networkstack.apishim.ProcessShimImpl;
@@ -99,6 +101,8 @@
     private final PackageManager mPackageManager;
     private final UserManager mUserManager;
     private final SystemConfigManager mSystemConfigManager;
+    private final PermissionManager mPermissionManager;
+    private final PermissionChangeListener mPermissionChangeListener;
     private final INetd mNetd;
     private final Dependencies mDeps;
     private final Context mContext;
@@ -230,6 +234,12 @@
             context.getContentResolver().registerContentObserver(
                     uri, notifyForDescendants, observer);
         }
+
+        public boolean shouldEnforceLocalNetRestrictions(int uid) {
+            // TODO(b/394567896): Update compat change checks for enforcement
+            return BpfNetMaps.isAtLeast25Q2() &&
+                    CompatChanges.isChangeEnabled(RESTRICT_LOCAL_NETWORK, uid);
+        }
     }
 
     private static class MultiSet<T> {
@@ -270,23 +280,48 @@
     }
 
     @VisibleForTesting
-    PermissionMonitor(@NonNull final Context context, @NonNull final INetd netd,
+    public PermissionMonitor(@NonNull final Context context, @NonNull final INetd netd,
             @NonNull final BpfNetMaps bpfNetMaps,
             @NonNull final Dependencies deps,
             @NonNull final HandlerThread thread) {
         mPackageManager = context.getPackageManager();
         mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE);
         mSystemConfigManager = context.getSystemService(SystemConfigManager.class);
+        mPermissionManager = context.getSystemService(PermissionManager.class);
+        mPermissionChangeListener = new PermissionChangeListener();
         mNetd = netd;
         mDeps = deps;
         mContext = context;
         mBpfNetMaps = bpfNetMaps;
         mThread = thread;
-        if (Flags.restrictLocalNetwork()) {
+        if (BpfNetMaps.isAtLeast25Q2()) {
+            // Local net restrictions is supported as a developer opt-in starting in Android B.
             // This listener should finish registration by the time the system has completed
             // boot setup such that any changes to runtime permissions for local network
             // restrictions can only occur after this registration has completed.
-            mPackageManager.addOnPermissionsChangeListener(new PermissionChangeListener());
+            mPackageManager.addOnPermissionsChangeListener(mPermissionChangeListener);
+        }
+    }
+
+    @VisibleForTesting
+    void setLocalNetworkPermissions(final int uid, @Nullable final String packageName) {
+        if (!mDeps.shouldEnforceLocalNetRestrictions(uid)) return;
+
+        final AttributionSource attributionSource =
+                new AttributionSource.Builder(uid).setPackageName(packageName).build();
+        final int permissionState = mPermissionManager.checkPermissionForPreflight(
+                NEARBY_WIFI_DEVICES, attributionSource);
+        if (permissionState == PermissionManager.PERMISSION_GRANTED) {
+            mBpfNetMaps.removeUidFromLocalNetBlockMap(attributionSource.getUid());
+        } else {
+            mBpfNetMaps.addUidToLocalNetBlockMap(attributionSource.getUid());
+        }
+        if (hasSdkSandbox(uid)){
+            // SDKs in the SDK RT cannot hold runtime permissions
+            final int sdkSandboxUid = sProcessShim.toSdkSandboxUid(uid);
+            if (!mBpfNetMaps.isUidBlockedFromUsingLocalNetwork(sdkSandboxUid)) {
+                mBpfNetMaps.addUidToLocalNetBlockMap(sdkSandboxUid);
+            }
         }
     }
 
@@ -350,6 +385,7 @@
                     uidsPerm.put(sdkSandboxUid, permission);
                 }
             }
+            setLocalNetworkPermissions(uid, app.packageName);
         }
         return uidsPerm;
     }
@@ -404,7 +440,7 @@
         final SparseIntArray appIdsPerm = new SparseIntArray();
         for (final int uid : mSystemConfigManager.getSystemPermissionUids(INTERNET)) {
             final int appId = UserHandle.getAppId(uid);
-            final int permission = appIdsPerm.get(appId) | PERMISSION_INTERNET;
+            final int permission = appIdsPerm.get(appId) | TRAFFIC_PERMISSION_INTERNET;
             appIdsPerm.put(appId, permission);
             if (hasSdkSandbox(appId)) {
                 appIdsPerm.put(sProcessShim.toSdkSandboxUid(appId), permission);
@@ -412,7 +448,7 @@
         }
         for (final int uid : mSystemConfigManager.getSystemPermissionUids(UPDATE_DEVICE_STATS)) {
             final int appId = UserHandle.getAppId(uid);
-            final int permission = appIdsPerm.get(appId) | PERMISSION_UPDATE_DEVICE_STATS;
+            final int permission = appIdsPerm.get(appId) | TRAFFIC_PERMISSION_UPDATE_DEVICE_STATS;
             appIdsPerm.put(appId, permission);
             if (hasSdkSandbox(appId)) {
                 appIdsPerm.put(sProcessShim.toSdkSandboxUid(appId), permission);
@@ -597,7 +633,7 @@
 
         final List<PackageInfo> apps = getInstalledPackagesAsUser(user);
 
-        // Save all apps
+        // Save all apps in mAllApps
         updateAllApps(apps);
 
         // Uids network permissions
@@ -634,6 +670,11 @@
             final int uid = allUids.keyAt(i);
             if (user.equals(UserHandle.getUserHandleForUid(uid))) {
                 mUidToNetworkPerm.delete(uid);
+                if (mDeps.shouldEnforceLocalNetRestrictions(uid)) {
+                    mBpfNetMaps.removeUidFromLocalNetBlockMap(uid);
+                    if (hasSdkSandbox(uid)) mBpfNetMaps.removeUidFromLocalNetBlockMap(
+                            sProcessShim.toSdkSandboxUid(uid));
+                }
                 removedUids.put(uid, allUids.valueAt(i));
             }
         }
@@ -655,7 +696,7 @@
             final int appId = removedUserAppIds.keyAt(i);
             // Need to clear permission if the removed appId is not found in the array.
             if (appIds.indexOfKey(appId) < 0) {
-                appIds.put(appId, PERMISSION_UNINSTALLED);
+                appIds.put(appId, TRAFFIC_PERMISSION_UNINSTALLED);
             }
         }
         sendAppIdsTrafficPermission(appIds);
@@ -707,7 +748,7 @@
             }
         } else {
             // The last package of this uid is removed from device. Clean the package up.
-            permission = PERMISSION_UNINSTALLED;
+            permission = TRAFFIC_PERMISSION_UNINSTALLED;
         }
         return permission;
     }
@@ -750,13 +791,13 @@
                 return "NETWORK";
             case PERMISSION_SYSTEM:
                 return "SYSTEM";
-            case PERMISSION_INTERNET:
+            case TRAFFIC_PERMISSION_INTERNET:
                 return "INTERNET";
-            case PERMISSION_UPDATE_DEVICE_STATS:
+            case TRAFFIC_PERMISSION_UPDATE_DEVICE_STATS:
                 return "UPDATE_DEVICE_STATS";
-            case (PERMISSION_INTERNET | PERMISSION_UPDATE_DEVICE_STATS):
+            case (TRAFFIC_PERMISSION_INTERNET | TRAFFIC_PERMISSION_UPDATE_DEVICE_STATS):
                 return "ALL";
-            case PERMISSION_UNINSTALLED:
+            case TRAFFIC_PERMISSION_UNINSTALLED:
                 return "UNINSTALLED";
             default:
                 return "UNKNOWN";
@@ -775,7 +816,7 @@
         // (PERMISSION_UNINSTALLED), remove the appId from the array. Otherwise, update the latest
         // permission to the appId.
         final int appId = UserHandle.getAppId(uid);
-        if (uidTrafficPerm == PERMISSION_UNINSTALLED) {
+        if (uidTrafficPerm == TRAFFIC_PERMISSION_UNINSTALLED) {
             userTrafficPerms.delete(appId);
         } else {
             userTrafficPerms.put(appId, uidTrafficPerm);
@@ -793,7 +834,7 @@
                 installed = true;
             }
         }
-        return installed ? permission : PERMISSION_UNINSTALLED;
+        return installed ? permission : TRAFFIC_PERMISSION_UNINSTALLED;
     }
 
     /**
@@ -828,6 +869,7 @@
             }
             sendUidsNetworkPermission(apps, true /* add */);
         }
+        setLocalNetworkPermissions(uid, packageName);
 
         // If the newly-installed package falls within some VPN's uid range, update Netd with it.
         // This needs to happen after the mUidToNetworkPerm update above, since
@@ -872,6 +914,11 @@
     synchronized void onPackageRemoved(@NonNull final String packageName, final int uid) {
         // Update uid permission.
         updateAppIdTrafficPermission(uid);
+        if (BpfNetMaps.isAtLeast25Q2()) {
+            mBpfNetMaps.removeUidFromLocalNetBlockMap(uid);
+            if (hasSdkSandbox(uid)) mBpfNetMaps.removeUidFromLocalNetBlockMap(
+                    sProcessShim.toSdkSandboxUid(uid));
+        }
         // Get the appId permission from all users then send the latest permission to netd.
         final int appId = UserHandle.getAppId(uid);
         final int appIdTrafficPerm = getAppIdTrafficPermission(appId);
@@ -930,11 +977,11 @@
         for (int i = 0; i < requestedPermissions.length; i++) {
             if (requestedPermissions[i].equals(INTERNET)
                     && ((requestedPermissionsFlags[i] & REQUESTED_PERMISSION_GRANTED) != 0)) {
-                permissions |= PERMISSION_INTERNET;
+                permissions |= TRAFFIC_PERMISSION_INTERNET;
             }
             if (requestedPermissions[i].equals(UPDATE_DEVICE_STATS)
                     && ((requestedPermissionsFlags[i] & REQUESTED_PERMISSION_GRANTED) != 0)) {
-                permissions |= PERMISSION_UPDATE_DEVICE_STATS;
+                permissions |= TRAFFIC_PERMISSION_UPDATE_DEVICE_STATS;
             }
         }
         return permissions;
@@ -1173,19 +1220,19 @@
         for (int i = 0; i < netdPermissionsAppIds.size(); i++) {
             int permissions = netdPermissionsAppIds.valueAt(i);
             switch(permissions) {
-                case (PERMISSION_INTERNET | PERMISSION_UPDATE_DEVICE_STATS):
+                case (TRAFFIC_PERMISSION_INTERNET | TRAFFIC_PERMISSION_UPDATE_DEVICE_STATS):
                     allPermissionAppIds.add(netdPermissionsAppIds.keyAt(i));
                     break;
-                case PERMISSION_INTERNET:
+                case TRAFFIC_PERMISSION_INTERNET:
                     internetPermissionAppIds.add(netdPermissionsAppIds.keyAt(i));
                     break;
-                case PERMISSION_UPDATE_DEVICE_STATS:
+                case TRAFFIC_PERMISSION_UPDATE_DEVICE_STATS:
                     updateStatsPermissionAppIds.add(netdPermissionsAppIds.keyAt(i));
                     break;
                 case PERMISSION_NONE:
                     noPermissionAppIds.add(netdPermissionsAppIds.keyAt(i));
                     break;
-                case PERMISSION_UNINSTALLED:
+                case TRAFFIC_PERMISSION_UNINSTALLED:
                     uninstalledAppIds.add(netdPermissionsAppIds.keyAt(i));
                     break;
                 default:
@@ -1197,15 +1244,15 @@
             // TODO: add a lock inside netd to protect IPC trafficSetNetPermForUids()
             if (allPermissionAppIds.size() != 0) {
                 mBpfNetMaps.setNetPermForUids(
-                        PERMISSION_INTERNET | PERMISSION_UPDATE_DEVICE_STATS,
+                        TRAFFIC_PERMISSION_INTERNET | TRAFFIC_PERMISSION_UPDATE_DEVICE_STATS,
                         toIntArray(allPermissionAppIds));
             }
             if (internetPermissionAppIds.size() != 0) {
-                mBpfNetMaps.setNetPermForUids(PERMISSION_INTERNET,
+                mBpfNetMaps.setNetPermForUids(TRAFFIC_PERMISSION_INTERNET,
                         toIntArray(internetPermissionAppIds));
             }
             if (updateStatsPermissionAppIds.size() != 0) {
-                mBpfNetMaps.setNetPermForUids(PERMISSION_UPDATE_DEVICE_STATS,
+                mBpfNetMaps.setNetPermForUids(TRAFFIC_PERMISSION_UPDATE_DEVICE_STATS,
                         toIntArray(updateStatsPermissionAppIds));
             }
             if (noPermissionAppIds.size() != 0) {
@@ -1213,7 +1260,7 @@
                         toIntArray(noPermissionAppIds));
             }
             if (uninstalledAppIds.size() != 0) {
-                mBpfNetMaps.setNetPermForUids(PERMISSION_UNINSTALLED,
+                mBpfNetMaps.setNetPermForUids(TRAFFIC_PERMISSION_UNINSTALLED,
                         toIntArray(uninstalledAppIds));
             }
         } catch (RemoteException | ServiceSpecificException e) {
@@ -1324,15 +1371,7 @@
     private class PermissionChangeListener implements PackageManager.OnPermissionsChangedListener {
         @Override
         public void onPermissionsChanged(int uid) {
-            // RESTRICT_LOCAL_NETWORK is a compat change that is enabled when developers manually
-            // opt-in to this change, or when the app's targetSdkVersion is greater than 36.
-            // The RESTRICT_LOCAL_NETWORK compat change is used here instead of the
-            // Flags.restrictLocalNetwork() is used to offer the feature to devices, but it will
-            // only be enforced when develoeprs choose to enable it.
-            // TODO(b/394567896): Update compat change checks
-            if (CompatChanges.isChangeEnabled(RESTRICT_LOCAL_NETWORK, uid)) {
-                // TODO(b/388803658): Update network permissions and record change
-            }
+            setLocalNetworkPermissions(uid, null);
         }
     }
 }
diff --git a/service/src/com/android/server/net/HeaderCompressionUtils.java b/service/src/com/android/server/net/HeaderCompressionUtils.java
new file mode 100644
index 0000000..5bd3a76
--- /dev/null
+++ b/service/src/com/android/server/net/HeaderCompressionUtils.java
@@ -0,0 +1,275 @@
+/*
+ * Copyright (C) 2025 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.server.net;
+
+import android.util.Log;
+
+import java.io.IOException;
+import java.nio.BufferUnderflowException;
+import java.nio.ByteBuffer;
+import java.util.Arrays;
+
+public class HeaderCompressionUtils {
+    private static final String TAG = "L2capHeaderCompressionUtils";
+    private static final int IPV6_HEADER_SIZE = 40;
+
+    private static byte[] decodeIpv6Address(ByteBuffer buffer, int mode, boolean isMulticast)
+            throws BufferUnderflowException, IOException {
+        // Mode is equivalent between SAM and DAM; however, isMulticast only applies to DAM.
+        final byte[] address = new byte[16];
+        // If multicast bit is set, mix it in the mode, so that the lower two bits represent the
+        // address mode, and the upper bit represents multicast compression.
+        switch ((isMulticast ? 0b100 : 0) | mode) {
+            case 0b000: // 128 bits. The full address is carried in-line.
+            case 0b100:
+                buffer.get(address);
+                break;
+            case 0b001: // 64 bits. The first 64-bits of the fe80:: address are elided.
+                address[0] = (byte) 0xfe;
+                address[1] = (byte) 0x80;
+                buffer.get(address, 8 /*off*/, 8 /*len*/);
+                break;
+            case 0b010: // 16 bits. fe80::ff:fe00:XXXX, where XXXX are the bits carried in-line
+                address[0] = (byte) 0xfe;
+                address[1] = (byte) 0x80;
+                address[11] = (byte) 0xff;
+                address[12] = (byte) 0xfe;
+                buffer.get(address, 14 /*off*/, 2 /*len*/);
+                break;
+            case 0b011: // 0 bits. The address is fully elided and derived from BLE MAC address
+                // Note that on Android, the BLE MAC addresses are not exposed via the API;
+                // therefore, this compression mode cannot be supported.
+                throw new IOException("Address cannot be fully elided");
+            case 0b101: // 48 bits. The address takes the form ffXX::00XX:XXXX:XXXX.
+                address[0] = (byte) 0xff;
+                address[1] = buffer.get();
+                buffer.get(address, 11 /*off*/, 5 /*len*/);
+                break;
+            case 0b110: // 32 bits. The address takes the form ffXX::00XX:XXXX
+                address[0] = (byte) 0xff;
+                address[1] = buffer.get();
+                buffer.get(address, 13 /*off*/, 3 /*len*/);
+                break;
+            case 0b111: // 8 bits. The address takes the form ff02::00XX.
+                address[0] = (byte) 0xff;
+                address[1] = (byte) 0x02;
+                address[15] = buffer.get();
+                break;
+        }
+        return address;
+    }
+
+    /**
+     * Performs 6lowpan header decompression in place.
+     *
+     * Note that the passed in buffer must have enough capacity for successful decompression.
+     *
+     * @param bytes The buffer containing the packet.
+     * @param len The size of the packet
+     * @return decompressed size or zero
+     * @throws BufferUnderflowException if an illegal packet is encountered.
+     * @throws IOException if an unsupported option is encountered.
+     */
+    public static int decompress6lowpan(byte[] bytes, int len)
+            throws BufferUnderflowException, IOException {
+        // Note that ByteBuffer's default byte order is big endian.
+        final ByteBuffer inBuffer = ByteBuffer.wrap(bytes);
+        inBuffer.limit(len);
+
+        // LOWPAN_IPHC base encoding:
+        //   0   1   2   3   4   5   6   7 | 8   9  10  11  12  13  14  15
+        // +---+---+---+---+---+---+---+---|---+---+---+---+---+---+---+---+
+        // | 0 | 1 | 1 |  TF   |NH | HLIM  |CID|SAC|  SAM  | M |DAC|  DAM  |
+        // +---+---+---+---+---+---+---+---|---+---+---+---+---+---+---+---+
+        final int iphc1 = inBuffer.get() & 0xff;
+        final int iphc2 = inBuffer.get() & 0xff;
+        // Dispatch must start with 0b011.
+        if ((iphc1 & 0xe0) != 0x60) {
+            throw new IOException("LOWPAN_IPHC does not start with 011");
+        }
+
+        final int tf = (iphc1 >> 3) & 3;         // Traffic class
+        final boolean nh = (iphc1 & 4) != 0;     // Next header
+        final int hlim = iphc1 & 3;              // Hop limit
+        final boolean cid = (iphc2 & 0x80) != 0; // Context identifier extension
+        final boolean sac = (iphc2 & 0x40) != 0; // Source address compression
+        final int sam = (iphc2 >> 4) & 3;        // Source address mode
+        final boolean m = (iphc2 & 8) != 0;      // Multicast compression
+        final boolean dac = (iphc2 & 4) != 0;    // Destination address compression
+        final int dam = iphc2 & 3;               // Destination address mode
+
+        final ByteBuffer ipv6Header = ByteBuffer.allocate(IPV6_HEADER_SIZE);
+
+        final int trafficClass;
+        final int flowLabel;
+        switch (tf) {
+            case 0b00: // ECN + DSCP + 4-bit Pad + Flow Label (4 bytes)
+                trafficClass = inBuffer.get() & 0xff;
+                flowLabel = (inBuffer.get() & 0x0f) << 16
+                        | (inBuffer.get() & 0xff) << 8
+                        | (inBuffer.get() & 0xff);
+                break;
+            case 0b01: // ECN + 2-bit Pad + Flow Label (3 bytes), DSCP is elided.
+                final int firstByte = inBuffer.get() & 0xff;
+                //     0     1     2     3     4     5     6     7
+                // +-----+-----+-----+-----+-----+-----+-----+-----+
+                // |          DS FIELD, DSCP           | ECN FIELD |
+                // +-----+-----+-----+-----+-----+-----+-----+-----+
+                // rfc6282 does not explicitly state what value to use for DSCP, assuming 0.
+                trafficClass = firstByte >> 6;
+                flowLabel = (firstByte & 0x0f) << 16
+                        | (inBuffer.get() & 0xff) << 8
+                        | (inBuffer.get() & 0xff);
+                break;
+            case 0b10: // ECN + DSCP (1 byte), Flow Label is elided.
+                trafficClass = inBuffer.get() & 0xff;
+                // rfc6282 does not explicitly state what value to use, assuming 0.
+                flowLabel = 0;
+                break;
+            case 0b11: // Traffic Class and Flow Label are elided.
+                // rfc6282 does not explicitly state what value to use, assuming 0.
+                trafficClass = 0;
+                flowLabel = 0;
+                break;
+            default:
+                // This cannot happen. Crash if it does.
+                throw new IllegalStateException("Illegal TF value");
+        }
+
+        // Write version, traffic class, and flow label
+        final int versionTcFlowLabel = (6 << 28) | (trafficClass << 20) | flowLabel;
+        ipv6Header.putInt(versionTcFlowLabel);
+
+        // Payload length is still unknown. Use 0 for now.
+        ipv6Header.putShort((short) 0);
+
+        // We do not use UDP or extension header compression, therefore the next header
+        // cannot be compressed.
+        if (nh) throw new IOException("Next header cannot be compressed");
+        // Write next header
+        ipv6Header.put(inBuffer.get());
+
+        final byte hopLimit;
+        switch (hlim) {
+            case 0b00: // The Hop Limit field is carried in-line.
+                hopLimit = inBuffer.get();
+                break;
+            case 0b01: // The Hop Limit field is compressed and the hop limit is 1.
+                hopLimit = 1;
+                break;
+            case 0b10: // The Hop Limit field is compressed and the hop limit is 64.
+                hopLimit = 64;
+                break;
+            case 0b11: // The Hop Limit field is compressed and the hop limit is 255.
+                hopLimit = (byte) 255;
+                break;
+            default:
+                // This cannot happen. Crash if it does.
+                throw new IllegalStateException("Illegal HLIM value");
+        }
+        ipv6Header.put(hopLimit);
+
+        if (cid) throw new IOException("Context based compression not supported");
+        if (sac) throw new IOException("Context based compression not supported");
+        if (dac) throw new IOException("Context based compression not supported");
+
+        // Write source address
+        ipv6Header.put(decodeIpv6Address(inBuffer, sam, false /* isMulticast */));
+
+        // Write destination address
+        ipv6Header.put(decodeIpv6Address(inBuffer, dam, m));
+
+        // Go back and fix up payloadLength
+        final short payloadLength = (short) inBuffer.remaining();
+        ipv6Header.putShort(4, payloadLength);
+
+        // Done! Check that 40 bytes were written.
+        if (ipv6Header.position() != IPV6_HEADER_SIZE) {
+            // This indicates a bug in our code -> crash.
+            throw new IllegalStateException("Faulty decompression wrote less than 40 bytes");
+        }
+
+        // Ensure there is enough room in the buffer
+        final int packetLength = payloadLength + IPV6_HEADER_SIZE;
+        if (bytes.length < packetLength) {
+            throw new IOException("Decompressed packet exceeds buffer size");
+        }
+
+        // Move payload bytes back to make room for the header
+        inBuffer.limit(packetLength);
+        System.arraycopy(bytes, inBuffer.position(), bytes, IPV6_HEADER_SIZE, payloadLength);
+        // Copy IPv6 header to the beginning of the buffer.
+        inBuffer.position(0);
+        ipv6Header.flip();
+        inBuffer.put(ipv6Header);
+
+        return packetLength;
+    }
+
+    /**
+     * Performs 6lowpan header compression in place.
+     *
+     * @param bytes The buffer containing the packet.
+     * @param len The size of the packet
+     * @return compressed size or zero
+     * @throws BufferUnderflowException if an illegal packet is encountered.
+     * @throws IOException if an unsupported option is encountered.
+     */
+    public static int compress6lowpan(byte[] bytes, final int len)
+            throws BufferUnderflowException, IOException {
+        // Compression only happens on egress, i.e. the packet is read from the tun fd.
+        // This means that this code can be a bit more lenient.
+        if (len < 40) {
+            Log.wtf(TAG, "Encountered short (<40 byte) packet");
+            return 0;
+        }
+
+        // Note that ByteBuffer's default byte order is big endian.
+        final ByteBuffer inBuffer = ByteBuffer.wrap(bytes);
+        inBuffer.limit(len);
+
+        // Check that the packet is an IPv6 packet
+        final int versionTcFlowLabel = inBuffer.getInt() & 0xffffffff;
+        if ((versionTcFlowLabel >> 28) != 6) {
+            return 0;
+        }
+
+        // Check that the payload length matches the packet length - 40.
+        int payloadLength = inBuffer.getShort();
+        if (payloadLength != len - IPV6_HEADER_SIZE) {
+            throw new IOException("Encountered packet with payload length mismatch");
+        }
+
+        // Implements rfc 6282 6lowpan header compression using iphc 0110 0000 0000 0000 (all
+        // fields are carried inline).
+        inBuffer.position(0);
+        inBuffer.put((byte) 0x60);
+        inBuffer.put((byte) 0x00);
+        final byte trafficClass = (byte) ((versionTcFlowLabel >> 20) & 0xff);
+        inBuffer.put(trafficClass);
+        final byte flowLabelMsb = (byte) ((versionTcFlowLabel >> 16) & 0x0f);
+        final short flowLabelLsb = (short) (versionTcFlowLabel & 0xffff);
+        inBuffer.put(flowLabelMsb);
+        // Note: the next putShort overrides the payload length. This is WAI as the payload length
+        // is reconstructed via L2CAP packet length.
+        inBuffer.putShort(flowLabelLsb);
+
+        // Since the iphc (2 bytes) matches the payload length that was elided (2 bytes), the length
+        // of the packet did not change.
+        return len;
+    }
+}
diff --git a/service/src/com/android/server/net/L2capNetwork.java b/service/src/com/android/server/net/L2capNetwork.java
index b9d5f13..ca155db 100644
--- a/service/src/com/android/server/net/L2capNetwork.java
+++ b/service/src/com/android/server/net/L2capNetwork.java
@@ -16,9 +16,12 @@
 
 package com.android.server.net;
 
+import static android.net.L2capNetworkSpecifier.HEADER_COMPRESSION_6LOWPAN;
+
 import android.annotation.Nullable;
 import android.bluetooth.BluetoothSocket;
 import android.content.Context;
+import android.net.L2capNetworkSpecifier;
 import android.net.LinkProperties;
 import android.net.NetworkAgent;
 import android.net.NetworkAgentConfig;
@@ -35,30 +38,30 @@
 import android.os.ParcelFileDescriptor;
 import android.util.Log;
 
+import com.android.server.L2capNetworkProvider;
+
 public class L2capNetwork {
     private static final NetworkScore NETWORK_SCORE = new NetworkScore.Builder().build();
     private final String mLogTag;
     private final Handler mHandler;
-    private final String mIfname;
     private final L2capPacketForwarder mForwarder;
     private final NetworkCapabilities mNetworkCapabilities;
-    private final L2capIpClient mIpClient;
     private final NetworkAgent mNetworkAgent;
 
     /** IpClient wrapper to handle IPv6 link-local provisioning for L2CAP tun.
      *
      * Note that the IpClient does not need to be stopped.
      */
-    private static class L2capIpClient extends IpClientCallbacks {
+    public static class L2capIpClient extends IpClientCallbacks {
         private final String mLogTag;
         private final ConditionVariable mOnIpClientCreatedCv = new ConditionVariable(false);
         private final ConditionVariable mOnProvisioningSuccessCv = new ConditionVariable(false);
         @Nullable
         private IpClientManager mIpClient;
         @Nullable
-        private LinkProperties mLinkProperties;
+        private volatile LinkProperties mLinkProperties;
 
-        L2capIpClient(String logTag, Context context, String ifname) {
+        public L2capIpClient(String logTag, Context context, String ifname) {
             mLogTag = logTag;
             IpClientUtil.makeIpClient(context, ifname, this);
         }
@@ -71,11 +74,24 @@
 
         @Override
         public void onProvisioningSuccess(LinkProperties lp) {
-            Log.d(mLogTag, "Successfully provisionined l2cap tun: " + lp);
+            Log.d(mLogTag, "Successfully provisioned l2cap tun: " + lp);
             mLinkProperties = lp;
             mOnProvisioningSuccessCv.open();
         }
 
+        @Override
+        public void onProvisioningFailure(LinkProperties lp) {
+            Log.i(mLogTag, "Failed to provision l2cap tun: " + lp);
+            mLinkProperties = null;
+            mOnProvisioningSuccessCv.open();
+        }
+
+        /**
+         * Starts IPv6 link-local provisioning.
+         *
+         * @return LinkProperties on success, null on failure.
+         */
+        @Nullable
         public LinkProperties start() {
             mOnIpClientCreatedCv.block();
             // mIpClient guaranteed non-null.
@@ -99,27 +115,28 @@
         void onNetworkUnwanted(L2capNetwork network);
     }
 
-    public L2capNetwork(Handler handler, Context context, NetworkProvider provider, String ifname,
-            BluetoothSocket socket, ParcelFileDescriptor tunFd,
-            NetworkCapabilities networkCapabilities, ICallback cb) {
-        // TODO: add a check that this constructor is invoked on the handler thread.
-        mLogTag = String.format("L2capNetwork[%s]", ifname);
+    public L2capNetwork(String logTag, Handler handler, Context context, NetworkProvider provider,
+            BluetoothSocket socket, ParcelFileDescriptor tunFd, NetworkCapabilities nc,
+            LinkProperties lp, L2capNetworkProvider.Dependencies deps, ICallback cb) {
+        mLogTag = logTag;
         mHandler = handler;
-        mIfname = ifname;
-        mForwarder = new L2capPacketForwarder(handler, tunFd, socket, () -> {
+        mNetworkCapabilities = nc;
+
+        final L2capNetworkSpecifier spec = (L2capNetworkSpecifier) nc.getNetworkSpecifier();
+        final boolean compressHeaders = spec.getHeaderCompression() == HEADER_COMPRESSION_6LOWPAN;
+
+        mForwarder = deps.createL2capPacketForwarder(handler, tunFd, socket, compressHeaders,
+                () -> {
             // TODO: add a check that this callback is invoked on the handler thread.
             cb.onError(L2capNetwork.this);
         });
-        mNetworkCapabilities = networkCapabilities;
-        mIpClient = new L2capIpClient(mLogTag, context, ifname);
-        final LinkProperties linkProperties = mIpClient.start();
 
         final NetworkAgentConfig config = new NetworkAgentConfig.Builder().build();
         mNetworkAgent = new NetworkAgent(context, mHandler.getLooper(), mLogTag,
-                networkCapabilities, linkProperties, NETWORK_SCORE, config, provider) {
+                nc, lp, NETWORK_SCORE, config, provider) {
             @Override
             public void onNetworkUnwanted() {
-                Log.i(mLogTag, mIfname + ": Network is unwanted");
+                Log.i(mLogTag, "Network is unwanted");
                 // TODO: add a check that this callback is invoked on the handler thread.
                 cb.onNetworkUnwanted(L2capNetwork.this);
             }
@@ -128,6 +145,25 @@
         mNetworkAgent.markConnected();
     }
 
+    /** Create an L2capNetwork or return null on failure. */
+    @Nullable
+    public static L2capNetwork create(Handler handler, Context context, NetworkProvider provider,
+            String ifname, BluetoothSocket socket, ParcelFileDescriptor tunFd,
+            NetworkCapabilities nc, L2capNetworkProvider.Dependencies deps, ICallback cb) {
+        // TODO: add a check that this function is invoked on the handler thread.
+        final String logTag = String.format("L2capNetwork[%s]", ifname);
+
+        // L2capIpClient#start() blocks until provisioning either succeeds (and returns
+        // LinkProperties) or fails (and returns null).
+        // Note that since L2capNetwork is using IPv6 link-local provisioning the most likely
+        // (only?) failure mode is due to the interface disappearing.
+        final LinkProperties lp = deps.createL2capIpClient(logTag, context, ifname).start();
+        if (lp == null) return null;
+
+        return new L2capNetwork(
+                logTag, handler, context, provider, socket, tunFd, nc, lp, deps, cb);
+    }
+
     /** Get the NetworkCapabilities used for this Network */
     public NetworkCapabilities getNetworkCapabilities() {
         return mNetworkCapabilities;
diff --git a/service/src/com/android/server/net/L2capPacketForwarder.java b/service/src/com/android/server/net/L2capPacketForwarder.java
index cef351c..8420d60 100644
--- a/service/src/com/android/server/net/L2capPacketForwarder.java
+++ b/service/src/com/android/server/net/L2capPacketForwarder.java
@@ -16,6 +16,9 @@
 
 package com.android.server.net;
 
+import static com.android.server.net.HeaderCompressionUtils.compress6lowpan;
+import static com.android.server.net.HeaderCompressionUtils.decompress6lowpan;
+
 import android.bluetooth.BluetoothSocket;
 import android.os.Handler;
 import android.os.ParcelFileDescriptor;
@@ -29,6 +32,7 @@
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
+import java.nio.BufferUnderflowException;
 
 /**
  * Forwards packets from a BluetoothSocket of type L2CAP to a tun fd and vice versa.
@@ -105,10 +109,10 @@
         public int read(byte[] bytes, int off, int len) throws IOException {
             // Note: EINTR is handled internally and automatically triggers a retry loop.
             int bytesRead = mInputStream.read(bytes, off, len);
-            if (bytesRead > MTU) {
+            if (bytesRead < 0 || bytesRead > MTU) {
                 // Don't try to recover, just trigger network teardown. This might indicate a bug in
                 // the Bluetooth stack.
-                throw new IOException("Packet exceeds MTU");
+                throw new IOException("Packet exceeds MTU or reached EOF. Read: " + bytesRead);
             }
             return bytesRead;
         }
@@ -222,13 +226,19 @@
         private volatile boolean mIsRunning = true;
 
         private final String mLogTag;
-        private IReadWriteFd mReadFd;
-        private IReadWriteFd mWriteFd;
+        private final IReadWriteFd mReadFd;
+        private final IReadWriteFd mWriteFd;
+        private final boolean mIsIngress;
+        private final boolean mCompressHeaders;
 
-        L2capThread(String logTag, IReadWriteFd readFd, IReadWriteFd writeFd) {
-            mLogTag = logTag;
+        L2capThread(IReadWriteFd readFd, IReadWriteFd writeFd, boolean isIngress,
+                boolean compressHeaders) {
+            super("L2capNetworkProvider-ForwarderThread");
+            mLogTag = isIngress ? "L2capForwarderThread-Ingress" : "L2capForwarderThread-Egress";
             mReadFd = readFd;
             mWriteFd = writeFd;
+            mIsIngress = isIngress;
+            mCompressHeaders = compressHeaders;
         }
 
         private void postOnError() {
@@ -242,20 +252,28 @@
         public void run() {
             while (mIsRunning) {
                 try {
-                    final int readBytes = mReadFd.read(mBuffer, 0 /*off*/, mBuffer.length);
+                    int readBytes = mReadFd.read(mBuffer, 0 /*off*/, mBuffer.length);
                     // No bytes to write, continue.
                     if (readBytes <= 0) {
                         Log.w(mLogTag, "Zero-byte read encountered: " + readBytes);
                         continue;
                     }
 
-                    // If the packet exceeds MTU, drop it.
+                    if (mCompressHeaders) {
+                        if (mIsIngress) {
+                            readBytes = decompress6lowpan(mBuffer, readBytes);
+                        } else {
+                            readBytes = compress6lowpan(mBuffer, readBytes);
+                        }
+                    }
+
+                    // If the packet is 0-length post de/compression or exceeds MTU, drop it.
                     // Note that a large read on BluetoothSocket throws an IOException to tear down
                     // the network.
-                    if (readBytes > MTU) continue;
+                    if (readBytes <= 0 || readBytes > MTU) continue;
 
                     mWriteFd.write(mBuffer, 0 /*off*/, readBytes);
-                } catch (IOException e) {
+                } catch (IOException|BufferUnderflowException e) {
                     Log.e(mLogTag, "L2capThread exception", e);
                     // Tear down the network on any error.
                     mIsRunning = false;
@@ -273,19 +291,20 @@
     }
 
     public L2capPacketForwarder(Handler handler, ParcelFileDescriptor tunFd, BluetoothSocket socket,
-            ICallback cb) {
-        this(handler, new FdWrapper(tunFd), new BluetoothSocketWrapper(socket), cb);
+            boolean compressHdrs, ICallback cb) {
+        this(handler, new FdWrapper(tunFd), new BluetoothSocketWrapper(socket), compressHdrs, cb);
     }
 
     @VisibleForTesting
-    L2capPacketForwarder(Handler handler, IReadWriteFd tunFd, IReadWriteFd l2capFd, ICallback cb) {
+    L2capPacketForwarder(Handler handler, IReadWriteFd tunFd, IReadWriteFd l2capFd,
+            boolean compressHeaders, ICallback cb) {
         mHandler = handler;
         mTunFd = tunFd;
         mL2capFd = l2capFd;
         mCallback = cb;
 
-        mIngressThread = new L2capThread("L2capThread-Ingress", l2capFd, tunFd);
-        mEgressThread = new L2capThread("L2capThread-Egress", tunFd, l2capFd);
+        mIngressThread = new L2capThread(l2capFd, tunFd, true /*isIngress*/, compressHeaders);
+        mEgressThread = new L2capThread(tunFd, l2capFd, false /*isIngress*/, compressHeaders);
 
         mIngressThread.start();
         mEgressThread.start();
diff --git a/staticlibs/Android.bp b/staticlibs/Android.bp
index 0eab6e7..8034e57 100644
--- a/staticlibs/Android.bp
+++ b/staticlibs/Android.bp
@@ -438,7 +438,11 @@
     srcs: [
         "device/com/android/net/module/util/FdEventsReader.java",
         "device/com/android/net/module/util/HandlerUtils.java",
+        "device/com/android/net/module/util/JniUtil.java",
+        "device/com/android/net/module/util/RealtimeScheduler.java",
         "device/com/android/net/module/util/SharedLog.java",
+        "device/com/android/net/module/util/ServiceConnectivityJni.java",
+        "device/com/android/net/module/util/TimerFdUtils.java",
         "framework/com/android/net/module/util/ByteUtils.java",
         "framework/com/android/net/module/util/CollectionUtils.java",
         "framework/com/android/net/module/util/DnsUtils.java",
diff --git a/staticlibs/client-libs/netd/com/android/net/module/util/NetdUtils.java b/staticlibs/client-libs/netd/com/android/net/module/util/NetdUtils.java
index 8b2fe58..4af516d 100644
--- a/staticlibs/client-libs/netd/com/android/net/module/util/NetdUtils.java
+++ b/staticlibs/client-libs/netd/com/android/net/module/util/NetdUtils.java
@@ -148,25 +148,6 @@
         netd.tetherStartWithConfiguration(config);
     }
 
-    /** Setup interface for tethering. */
-    public static void tetherInterface(final INetd netd, int netId, final String iface,
-            final IpPrefix dest) throws RemoteException, ServiceSpecificException {
-        tetherInterface(netd, netId, iface, dest, 20 /* maxAttempts */, 50 /* pollingIntervalMs */);
-    }
-
-    /** Setup interface with configurable retries for tethering. */
-    public static void tetherInterface(final INetd netd, int netId, final String iface,
-            final IpPrefix dest, int maxAttempts, int pollingIntervalMs)
-            throws RemoteException, ServiceSpecificException {
-        netd.tetherInterfaceAdd(iface);
-        networkAddInterface(netd, netId, iface, maxAttempts, pollingIntervalMs);
-        // Activate a route to dest and IPv6 link local.
-        modifyRoute(netd, ModifyOperation.ADD, netId,
-                new RouteInfo(dest, null, iface, RTN_UNICAST));
-        modifyRoute(netd, ModifyOperation.ADD, netId,
-                new RouteInfo(new IpPrefix("fe80::/64"), null, iface, RTN_UNICAST));
-    }
-
     /**
      * Retry Netd#networkAddInterface for EBUSY error code.
      * If the same interface (e.g., wlan0) is in client mode and then switches to tethered mode.
@@ -174,7 +155,7 @@
      * in use in netd because the ConnectivityService thread hasn't processed the disconnect yet.
      * See b/158269544 for detail.
      */
-    private static void networkAddInterface(final INetd netd, int netId, final String iface,
+    public static void networkAddInterface(final INetd netd, int netId, final String iface,
             int maxAttempts, int pollingIntervalMs)
             throws ServiceSpecificException, RemoteException {
         for (int i = 1; i <= maxAttempts; i++) {
@@ -193,16 +174,6 @@
         }
     }
 
-    /** Reset interface for tethering. */
-    public static void untetherInterface(final INetd netd, int netId, String iface)
-            throws RemoteException, ServiceSpecificException {
-        try {
-            netd.tetherInterfaceRemove(iface);
-        } finally {
-            netd.networkRemoveInterface(netId, iface);
-        }
-    }
-
     /** Add |routes| to the given network. */
     public static void addRoutesToNetwork(final INetd netd, int netId, final String iface,
             final List<RouteInfo> routes) {
diff --git a/staticlibs/client-libs/tests/unit/src/com/android/net/module/util/NetdUtilsTest.java b/staticlibs/client-libs/tests/unit/src/com/android/net/module/util/NetdUtilsTest.java
index c2fbb56..0241d0a 100644
--- a/staticlibs/client-libs/tests/unit/src/com/android/net/module/util/NetdUtilsTest.java
+++ b/staticlibs/client-libs/tests/unit/src/com/android/net/module/util/NetdUtilsTest.java
@@ -24,13 +24,9 @@
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
-import static org.mockito.ArgumentMatchers.any;
-import static org.mockito.ArgumentMatchers.anyInt;
-import static org.mockito.ArgumentMatchers.anyString;
 import static org.mockito.ArgumentMatchers.argThat;
 import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.Mockito.doAnswer;
-import static org.mockito.Mockito.never;
 import static org.mockito.Mockito.reset;
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
@@ -39,7 +35,6 @@
 
 import android.net.INetd;
 import android.net.InterfaceConfigurationParcel;
-import android.net.IpPrefix;
 import android.os.RemoteException;
 import android.os.ServiceSpecificException;
 
@@ -61,7 +56,6 @@
     @Mock private INetd mNetd;
 
     private static final String IFACE = "TEST_IFACE";
-    private static final IpPrefix TEST_IPPREFIX = new IpPrefix("192.168.42.1/24");
     private static final int TEST_NET_ID = 123;
 
     @Before
@@ -150,20 +144,21 @@
     }
 
     @Test
-    public void testTetherInterfaceSuccessful() throws Exception {
+    public void testNetworkAddInterfaceSuccessful() throws Exception {
         // Expect #networkAddInterface successful at first tries.
-        verifyTetherInterfaceSucceeds(1);
+        verifyNetworkAddInterfaceSucceeds(1);
 
         // Expect #networkAddInterface successful after 10 tries.
-        verifyTetherInterfaceSucceeds(10);
+        verifyNetworkAddInterfaceSucceeds(10);
     }
 
-    private void runTetherInterfaceWithServiceSpecificException(int expectedTries,
+    private void runNetworkAddInterfaceWithServiceSpecificException(int expectedTries,
             int expectedCode) throws Exception {
         setNetworkAddInterfaceOutcome(new ServiceSpecificException(expectedCode), expectedTries);
 
         try {
-            NetdUtils.tetherInterface(mNetd, TEST_NET_ID, IFACE, TEST_IPPREFIX, 20, 0);
+            NetdUtils.networkAddInterface(mNetd, TEST_NET_ID, IFACE,
+                    20 /* maxAttempts */, 0 /* pollingIntervalMs */);
             fail("Expect throw ServiceSpecificException");
         } catch (ServiceSpecificException e) {
             assertEquals(e.errorCode, expectedCode);
@@ -173,11 +168,12 @@
         reset(mNetd);
     }
 
-    private void runTetherInterfaceWithRemoteException(int expectedTries) throws Exception {
+    private void runNetworkAddInterfaceWithRemoteException(int expectedTries) throws Exception {
         setNetworkAddInterfaceOutcome(new RemoteException(), expectedTries);
 
         try {
-            NetdUtils.tetherInterface(mNetd, TEST_NET_ID, IFACE, TEST_IPPREFIX, 20, 0);
+            NetdUtils.networkAddInterface(mNetd, TEST_NET_ID, IFACE,
+                    20 /* maxAttempts */, 0 /* pollingIntervalMs */);
             fail("Expect throw RemoteException");
         } catch (RemoteException e) { }
 
@@ -186,41 +182,37 @@
     }
 
     private void verifyNetworkAddInterfaceFails(int expectedTries) throws Exception {
-        verify(mNetd).tetherInterfaceAdd(IFACE);
         verify(mNetd, times(expectedTries)).networkAddInterface(TEST_NET_ID, IFACE);
-        verify(mNetd, never()).networkAddRoute(anyInt(), anyString(), any(), any());
-
         verifyNoMoreInteractions(mNetd);
     }
 
-    private void verifyTetherInterfaceSucceeds(int expectedTries) throws Exception {
+    private void verifyNetworkAddInterfaceSucceeds(int expectedTries) throws Exception {
         setNetworkAddInterfaceOutcome(null, expectedTries);
 
-        NetdUtils.tetherInterface(mNetd, TEST_NET_ID, IFACE, TEST_IPPREFIX);
-        verify(mNetd).tetherInterfaceAdd(IFACE);
+        NetdUtils.networkAddInterface(mNetd, TEST_NET_ID, IFACE,
+                20 /* maxAttempts */, 0 /* pollingIntervalMs */);
         verify(mNetd, times(expectedTries)).networkAddInterface(TEST_NET_ID, IFACE);
-        verify(mNetd, times(2)).networkAddRoute(eq(TEST_NET_ID), eq(IFACE), any(), any());
         verifyNoMoreInteractions(mNetd);
         reset(mNetd);
     }
 
     @Test
-    public void testTetherInterfaceFailOnNetworkAddInterface() throws Exception {
+    public void testFailOnNetworkAddInterface() throws Exception {
         // Test throwing ServiceSpecificException with EBUSY failure.
-        runTetherInterfaceWithServiceSpecificException(20, EBUSY);
+        runNetworkAddInterfaceWithServiceSpecificException(20, EBUSY);
 
         // Test throwing ServiceSpecificException with unexpectedError.
         final int unexpectedError = 999;
-        runTetherInterfaceWithServiceSpecificException(1, unexpectedError);
+        runNetworkAddInterfaceWithServiceSpecificException(1, unexpectedError);
 
         // Test throwing ServiceSpecificException with unexpectedError after 7 tries.
-        runTetherInterfaceWithServiceSpecificException(7, unexpectedError);
+        runNetworkAddInterfaceWithServiceSpecificException(7, unexpectedError);
 
         // Test throwing RemoteException.
-        runTetherInterfaceWithRemoteException(1);
+        runNetworkAddInterfaceWithRemoteException(1);
 
         // Test throwing RemoteException after 3 tries.
-        runTetherInterfaceWithRemoteException(3);
+        runNetworkAddInterfaceWithRemoteException(3);
     }
 
     @Test
diff --git a/staticlibs/device/com/android/net/module/util/BpfDump.java b/staticlibs/device/com/android/net/module/util/BpfDump.java
index 4227194..d79f52e 100644
--- a/staticlibs/device/com/android/net/module/util/BpfDump.java
+++ b/staticlibs/device/com/android/net/module/util/BpfDump.java
@@ -23,6 +23,7 @@
 import android.util.Pair;
 
 import androidx.annotation.NonNull;
+import androidx.annotation.VisibleForTesting;
 
 import java.io.PrintWriter;
 import java.nio.ByteBuffer;
@@ -132,17 +133,35 @@
         }
     }
 
+    public static class Dependencies {
+        /**
+         * Call {@link Os#access}
+         */
+        public boolean access(String path, int mode) throws ErrnoException {
+            return Os.access(path, mode);
+        }
+    }
+
     /**
      * Dump the BpfMap status
      */
     public static <K extends Struct, V extends Struct> void dumpMapStatus(IBpfMap<K, V> map,
             PrintWriter pw, String mapName, String path) {
+        dumpMapStatus(map, pw, mapName, path, new Dependencies());
+    }
+
+    /**
+     * Dump the BpfMap status. Only test should use this method directly.
+     */
+    @VisibleForTesting
+    public static <K extends Struct, V extends Struct> void dumpMapStatus(IBpfMap<K, V> map,
+            PrintWriter pw, String mapName, String path, Dependencies deps) {
         if (map != null) {
             pw.println(mapName + ": OK");
             return;
         }
         try {
-            Os.access(path, R_OK);
+            deps.access(path, R_OK);
             pw.println(mapName + ": NULL(map is pinned to " + path + ")");
         } catch (ErrnoException e) {
             pw.println(mapName + ": NULL(map is not pinned to " + path + ": "
diff --git a/staticlibs/device/com/android/net/module/util/PrivateAddressCoordinator.java b/staticlibs/device/com/android/net/module/util/PrivateAddressCoordinator.java
index bb95585..2ce5b86 100644
--- a/staticlibs/device/com/android/net/module/util/PrivateAddressCoordinator.java
+++ b/staticlibs/device/com/android/net/module/util/PrivateAddressCoordinator.java
@@ -33,12 +33,14 @@
 import android.net.LinkProperties;
 import android.net.Network;
 import android.net.NetworkCapabilities;
+import android.os.Build;
 import android.os.RemoteException;
 import android.util.ArrayMap;
 
 import androidx.annotation.Nullable;
 
 import com.android.internal.annotations.VisibleForTesting;
+import com.android.modules.utils.build.SdkLevel;
 
 import java.io.PrintWriter;
 import java.net.Inet4Address;
@@ -67,9 +69,6 @@
     // WARNING: Keep in sync with chooseDownstreamAddress
     public static final int PREFIX_LENGTH = 24;
 
-    public static final String TETHER_FORCE_RANDOM_PREFIX_BASE_SELECTION =
-            "tether_force_random_prefix_base_selection";
-
     // Upstream monitor would be stopped when tethering is down. When tethering restart, downstream
     // address may be requested before coordinator get current upstream notification. To ensure
     // coordinator do not select conflict downstream prefix, mUpstreamPrefixMap would not be cleared
@@ -258,8 +257,15 @@
         return null;
     }
 
+    // TODO: Remove this method when SdkLevel.isAtLeastB() is fixed, aosp is at sdk level 36 or use
+    //  NetworkStackUtils.isAtLeast25Q2 when it is moved to a static lib.
+    public static boolean isAtLeast25Q2() {
+        return SdkLevel.isAtLeastB()  || (SdkLevel.isAtLeastV()
+                && "Baklava".equals(Build.VERSION.CODENAME));
+    }
+
     private int getRandomPrefixIndex() {
-        if (!mDeps.isFeatureEnabled(TETHER_FORCE_RANDOM_PREFIX_BASE_SELECTION)) return 0;
+        if (!isAtLeast25Q2()) return 0;
 
         final int random = getRandomInt() & 0xffffff;
         // This is to select the starting prefix range (/8, /12, or /16) instead of the actual
diff --git a/staticlibs/device/com/android/net/module/util/RealtimeScheduler.java b/staticlibs/device/com/android/net/module/util/RealtimeScheduler.java
index c8fdf72..2d95223 100644
--- a/staticlibs/device/com/android/net/module/util/RealtimeScheduler.java
+++ b/staticlibs/device/com/android/net/module/util/RealtimeScheduler.java
@@ -227,6 +227,13 @@
         return enqueueTask(new MessageTask(msg, SystemClock.elapsedRealtime() + delayMs), delayMs);
     }
 
+    private static boolean isMessageTask(Task task, int what) {
+        if (task instanceof MessageTask && ((MessageTask) task).mMessage.what == what) {
+            return true;
+        }
+        return false;
+    }
+
     /**
      * Remove a scheduled message.
      *
@@ -234,8 +241,24 @@
      */
     public void removeDelayedMessage(int what) {
         ensureRunningOnCorrectThread();
-        mTaskQueue.removeIf(task -> task instanceof MessageTask
-                && ((MessageTask) task).mMessage.what == what);
+        mTaskQueue.removeIf(task -> isMessageTask(task, what));
+    }
+
+    /**
+     * Check if there is a scheduled message.
+     *
+     * @param what the message to be checked
+     * @return true if there is a target message, false otherwise.
+     */
+    public boolean hasDelayedMessage(int what) {
+        ensureRunningOnCorrectThread();
+
+        for (Task task : mTaskQueue) {
+            if (isMessageTask(task, what)) {
+                return true;
+            }
+        }
+        return false;
     }
 
     /**
diff --git a/staticlibs/device/com/android/net/module/util/SkDestroyListener.java b/staticlibs/device/com/android/net/module/util/SkDestroyListener.java
new file mode 100644
index 0000000..c7c2829
--- /dev/null
+++ b/staticlibs/device/com/android/net/module/util/SkDestroyListener.java
@@ -0,0 +1,113 @@
+/*
+ * 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.net.module.util;
+
+import static android.system.OsConstants.NETLINK_INET_DIAG;
+
+import android.os.Handler;
+
+import com.android.net.module.util.ip.NetlinkMonitor;
+import com.android.net.module.util.netlink.InetDiagMessage;
+import com.android.net.module.util.netlink.NetlinkMessage;
+
+import java.io.PrintWriter;
+import java.util.function.Consumer;
+
+/**
+ * Monitor socket destroy and delete entry from cookie tag bpf map.
+ */
+public class SkDestroyListener extends NetlinkMonitor {
+    private static final int SKNLGRP_INET_TCP_DESTROY = 1;
+    private static final int SKNLGRP_INET_UDP_DESTROY = 2;
+    private static final int SKNLGRP_INET6_TCP_DESTROY = 3;
+    private static final int SKNLGRP_INET6_UDP_DESTROY = 4;
+
+    // TODO: if too many sockets are closed too quickly, this can overflow the socket buffer, and
+    // some entries in mCookieTagMap will not be freed. In order to fix this it would be needed to
+    // periodically dump all sockets and remove the tag entries for sockets that have been closed.
+    // For now, set a large-enough buffer that hundreds of sockets can be closed without getting
+    // ENOBUFS and leaking mCookieTagMap entries.
+    private static final int SOCK_RCV_BUF_SIZE = 512 * 1024;
+
+    private final Consumer<InetDiagMessage> mSkDestroyCallback;
+
+    /**
+     * Return SkDestroyListener that monitor both TCP and UDP socket destroy
+     *
+     * @param consumer The consumer that processes InetDiagMessage
+     * @param handler The Handler on which to poll for messages
+     * @param log A SharedLog to log to.
+     * @return SkDestroyListener
+     */
+    public static SkDestroyListener makeSkDestroyListener(final Consumer<InetDiagMessage> consumer,
+            final Handler handler, final SharedLog log) {
+        return makeSkDestroyListener(consumer, true /* monitorTcpSocket */,
+                true /* monitorUdpSocket */, handler, log);
+    }
+
+    /**
+     * Return SkDestroyListener that monitor socket destroy
+     *
+     * @param consumer The consumer that processes InetDiagMessage
+     * @param monitorTcpSocket {@code true} to monitor TCP socket destroy
+     * @param monitorUdpSocket {@code true} to monitor UDP socket destroy
+     * @param handler The Handler on which to poll for messages
+     * @param log A SharedLog to log to.
+     * @return SkDestroyListener
+     */
+    public static SkDestroyListener makeSkDestroyListener(final Consumer<InetDiagMessage> consumer,
+            final boolean monitorTcpSocket, final boolean monitorUdpSocket,
+            final Handler handler, final SharedLog log) {
+        if (!monitorTcpSocket && !monitorUdpSocket) {
+            throw new IllegalArgumentException(
+                    "Both monitorTcpSocket and monitorUdpSocket can not be false");
+        }
+        int bindGroups = 0;
+        if (monitorTcpSocket) {
+            bindGroups |= 1 << (SKNLGRP_INET_TCP_DESTROY - 1)
+                    | 1 << (SKNLGRP_INET6_TCP_DESTROY - 1);
+        }
+        if (monitorUdpSocket) {
+            bindGroups |= 1 << (SKNLGRP_INET_UDP_DESTROY - 1)
+                    | 1 << (SKNLGRP_INET6_UDP_DESTROY - 1);
+        }
+        return new SkDestroyListener(consumer, bindGroups, handler, log);
+    }
+
+    private SkDestroyListener(final Consumer<InetDiagMessage> consumer, final int bindGroups,
+            final Handler handler, final SharedLog log) {
+        super(handler, log, "SkDestroyListener", NETLINK_INET_DIAG,
+                bindGroups, SOCK_RCV_BUF_SIZE);
+        mSkDestroyCallback = consumer;
+    }
+
+    @Override
+    public void processNetlinkMessage(final NetlinkMessage nlMsg, final long whenMs) {
+        if (!(nlMsg instanceof InetDiagMessage)) {
+            mLog.e("Received non InetDiagMessage");
+            return;
+        }
+        mSkDestroyCallback.accept((InetDiagMessage) nlMsg);
+    }
+
+    /**
+     * Dump the contents of SkDestroyListener log.
+     */
+    public void dump(PrintWriter pw) {
+        mLog.reverseDump(pw);
+    }
+}
diff --git a/staticlibs/device/com/android/net/module/util/netlink/InetDiagMessage.java b/staticlibs/device/com/android/net/module/util/netlink/InetDiagMessage.java
index fecaa09..c9a89ec 100644
--- a/staticlibs/device/com/android/net/module/util/netlink/InetDiagMessage.java
+++ b/staticlibs/device/com/android/net/module/util/netlink/InetDiagMessage.java
@@ -309,16 +309,18 @@
     }
 
     private static void sendNetlinkDestroyRequest(FileDescriptor fd, int proto,
-            InetDiagMessage diagMsg) throws InterruptedIOException, ErrnoException {
+            StructInetDiagSockId id, short family, int state)
+            throws InterruptedIOException, ErrnoException {
+        // TODO: Investigate if it's fine to always set 0 to state and remove state from the arg
         final byte[] destroyMsg = InetDiagMessage.inetDiagReqV2(
                 proto,
-                diagMsg.inetDiagMsg.id,
-                diagMsg.inetDiagMsg.idiag_family,
+                id,
+                family,
                 SOCK_DESTROY,
                 (short) (StructNlMsgHdr.NLM_F_REQUEST | StructNlMsgHdr.NLM_F_ACK),
                 0 /* pad */,
                 0 /* idiagExt */,
-                1 << diagMsg.inetDiagMsg.idiag_state
+                state
         );
         NetlinkUtils.sendMessage(fd, destroyMsg, 0, destroyMsg.length, IO_TIMEOUT_MS);
         NetlinkUtils.receiveNetlinkAck(fd);
@@ -343,7 +345,8 @@
         Consumer<InetDiagMessage> handleNlDumpMsg = (diagMsg) -> {
             if (filter.test(diagMsg)) {
                 try {
-                    sendNetlinkDestroyRequest(destroyFd, proto, diagMsg);
+                    sendNetlinkDestroyRequest(destroyFd, proto, diagMsg.inetDiagMsg.id,
+                            diagMsg.inetDiagMsg.idiag_family, 1 << diagMsg.inetDiagMsg.idiag_state);
                     destroyedSockets.getAndIncrement();
                 } catch (InterruptedIOException | ErrnoException e) {
                     if (!(e instanceof ErrnoException
@@ -484,6 +487,30 @@
         Log.d(TAG, "Destroyed live tcp sockets for uids=" + ownerUids + " in " + durationMs + "ms");
     }
 
+    /**
+     * Close the udp socket which can be uniquely identified with the cookie and other information.
+     */
+    public static void destroyUdpSocket(final InetSocketAddress src, final InetSocketAddress dst,
+            final int ifIndex, final long cookie)
+            throws ErrnoException, SocketException, InterruptedIOException {
+        FileDescriptor fd = null;
+
+        try {
+            fd = NetlinkUtils.createNetLinkInetDiagSocket();
+            connectToKernel(fd);
+            final int family = (src.getAddress() instanceof Inet6Address) ? AF_INET6 : AF_INET;
+            final StructInetDiagSockId id = new StructInetDiagSockId(
+                    src,
+                    dst,
+                    ifIndex,
+                    cookie
+            );
+            sendNetlinkDestroyRequest(fd, IPPROTO_UDP, id, (short) family, 0 /* state */);
+        } finally {
+            closeSocketQuietly(fd);
+        }
+    }
+
     @Override
     public String toString() {
         return "InetDiagMessage{ "
diff --git a/staticlibs/framework/com/android/net/module/util/NetworkStackConstants.java b/staticlibs/framework/com/android/net/module/util/NetworkStackConstants.java
index 026e985..8d7ae5c 100644
--- a/staticlibs/framework/com/android/net/module/util/NetworkStackConstants.java
+++ b/staticlibs/framework/com/android/net/module/util/NetworkStackConstants.java
@@ -23,6 +23,7 @@
 import java.net.Inet6Address;
 import java.net.InetAddress;
 import java.net.UnknownHostException;
+import java.util.List;
 
 /**
  * Network constants used by the network stack.
@@ -341,6 +342,26 @@
      */
     public static final String TEST_URL_EXPIRATION_TIME = "test_url_expiration_time";
 
+    /**
+     * List of IpPrefix that are local network prefixes.
+     */
+    public static final List<IpPrefix> IPV4_LOCAL_PREFIXES = List.of(
+            new IpPrefix("169.254.0.0/16"), // Link Local
+            new IpPrefix("100.64.0.0/10"),  // CGNAT
+            new IpPrefix("10.0.0.0/8"),     // RFC1918
+            new IpPrefix("172.16.0.0/12"),  // RFC1918
+            new IpPrefix("192.168.0.0/16")  // RFC1918
+    );
+
+    /**
+     * List of IpPrefix that are multicast and broadcast prefixes.
+     */
+    public static final List<IpPrefix> MULTICAST_AND_BROADCAST_PREFIXES = List.of(
+            new IpPrefix("224.0.0.0/4"),               // Multicast
+            new IpPrefix("ff00::/8"),                  // Multicast
+            new IpPrefix("255.255.255.255/32")         // Broadcast
+    );
+
     // TODO: Move to Inet4AddressUtils
     // See aosp/1455936: NetworkStackConstants can't depend on it as it causes jarjar-related issues
     // for users of both the net-utils-device-common and net-utils-framework-common libraries.
diff --git a/staticlibs/tests/unit/host/python/apf_utils_test.py b/staticlibs/tests/unit/host/python/apf_utils_test.py
index 419b338..348df3b 100644
--- a/staticlibs/tests/unit/host/python/apf_utils_test.py
+++ b/staticlibs/tests/unit/host/python/apf_utils_test.py
@@ -103,8 +103,12 @@
       self, mock_adb_shell: MagicMock
   ) -> None:
     mock_adb_shell.return_value = """
+45: rmnet29: <POINTOPOINT,MULTICAST,NOARP> mtu 1500 qdisc ...
+ link/ether 73:01:23:45:df:e3 brd ff:ff:ff:ff:ff:ff
 46: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq ...
  link/ether 72:05:77:82:21:e0 brd ff:ff:ff:ff:ff:ff
+47: wlan1: <BROADCAST,MULTICAST> mtu 1500 qdisc ...
+ link/ether 6a:16:81:ff:82:9b brd ff:ff:ff:ff:ff:ff
 """
     mac_address = get_hardware_address(self.mock_ad, "wlan0")
     asserts.assert_equal(mac_address, "72:05:77:82:21:E0")
diff --git a/staticlibs/tests/unit/src/com/android/net/module/util/BpfDumpTest.java b/staticlibs/tests/unit/src/com/android/net/module/util/BpfDumpTest.java
index a66dacd..673d9e6 100644
--- a/staticlibs/tests/unit/src/com/android/net/module/util/BpfDumpTest.java
+++ b/staticlibs/tests/unit/src/com/android/net/module/util/BpfDumpTest.java
@@ -17,18 +17,13 @@
 package com.android.net.module.util;
 
 import static android.system.OsConstants.EPERM;
-import static android.system.OsConstants.R_OK;
-
-import static com.android.dx.mockito.inline.extended.ExtendedMockito.doReturn;
-import static com.android.dx.mockito.inline.extended.ExtendedMockito.doThrow;
-import static com.android.dx.mockito.inline.extended.ExtendedMockito.mockitoSession;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertThrows;
 import static org.junit.Assert.assertTrue;
 
+import android.annotation.Nullable;
 import android.system.ErrnoException;
-import android.system.Os;
 import android.util.Pair;
 
 import androidx.test.filters.SmallTest;
@@ -38,7 +33,6 @@
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
-import org.mockito.MockitoSession;
 
 import java.io.PrintWriter;
 import java.io.StringWriter;
@@ -129,9 +123,14 @@
         assertTrue(dump.contains("key=789, val=123"));
     }
 
-    private String getDumpMapStatus(final IBpfMap<Struct.S32, Struct.S32> map) {
+    private String getDumpMapStatus(final IBpfMap<Struct.S32, Struct.S32> map,
+            @Nullable final BpfDump.Dependencies deps) {
         final StringWriter sw = new StringWriter();
-        BpfDump.dumpMapStatus(map, new PrintWriter(sw), "mapName", "mapPath");
+        if (deps == null) {
+            BpfDump.dumpMapStatus(map, new PrintWriter(sw), "mapName", "mapPath");
+        } else {
+            BpfDump.dumpMapStatus(map, new PrintWriter(sw), "mapName", "mapPath", deps);
+        }
         return sw.toString();
     }
 
@@ -139,25 +138,34 @@
     public void testGetMapStatus() {
         final IBpfMap<Struct.S32, Struct.S32> map =
                 new TestBpfMap<>(Struct.S32.class, Struct.S32.class);
-        assertEquals("mapName: OK\n", getDumpMapStatus(map));
+        assertEquals("mapName: OK\n", getDumpMapStatus(map, null /* deps */));
     }
 
     @Test
-    public void testGetMapStatusNull() {
-        final MockitoSession session = mockitoSession()
-                .spyStatic(Os.class)
-                .startMocking();
-        try {
-            // Os.access succeeds
-            doReturn(true).when(() -> Os.access("mapPath", R_OK));
-            assertEquals("mapName: NULL(map is pinned to mapPath)\n", getDumpMapStatus(null));
+    public void testGetMapStatusNull_accessSucceed() {
+        // Os.access succeeds
+        assertEquals("mapName: NULL(map is pinned to mapPath)\n",
+                getDumpMapStatus(null /* map */,
+                        new BpfDump.Dependencies() {
+                            @Override
+                            public boolean access(String path, int mode) {
+                                return true;
+                            }
+                        })
+        );
+    }
 
-            // Os.access throws EPERM
-            doThrow(new ErrnoException("", EPERM)).when(() -> Os.access("mapPath", R_OK));
-            assertEquals("mapName: NULL(map is not pinned to mapPath: Operation not permitted)\n",
-                    getDumpMapStatus(null));
-        } finally {
-            session.finishMocking();
-        }
+    @Test
+    public void testGetMapStatusNull_accessThrow() {
+        // Os.access throws EPERM
+        assertEquals("mapName: NULL(map is not pinned to mapPath: Operation not permitted)\n",
+                getDumpMapStatus(null /* map */,
+                        new BpfDump.Dependencies(){
+                            @Override
+                            public boolean access(String path, int mode) throws ErrnoException {
+                                throw new ErrnoException("", EPERM);
+                            }
+                        })
+        );
     }
 }
diff --git a/tests/unit/java/com/android/server/net/SkDestroyListenerTest.kt b/staticlibs/tests/unit/src/com/android/net/module/util/SkDestroyListenerTest.kt
similarity index 89%
rename from tests/unit/java/com/android/server/net/SkDestroyListenerTest.kt
rename to staticlibs/tests/unit/src/com/android/net/module/util/SkDestroyListenerTest.kt
index 18785e5..e4b47fe 100644
--- a/tests/unit/java/com/android/server/net/SkDestroyListenerTest.kt
+++ b/staticlibs/tests/unit/src/com/android/net/module/util/SkDestroyListenerTest.kt
@@ -14,11 +14,11 @@
  * limitations under the License.
  */
 
-package com.android.server.net
+package com.android.net.module.util
 
 import android.os.Handler
 import android.os.HandlerThread
-import com.android.net.module.util.SharedLog
+import com.android.net.module.util.SkDestroyListener.makeSkDestroyListener
 import com.android.testutils.DevSdkIgnoreRunner
 import java.io.PrintWriter
 import org.junit.After
@@ -54,7 +54,7 @@
         doReturn(sharedLog).`when`(sharedLog).forSubComponent(any())
 
         val handler = Handler(handlerThread.looper)
-        val skDestroylistener = SkDestroyListener(null /* cookieTagMap */, handler, sharedLog)
+        val skDestroylistener = makeSkDestroyListener({} /* consumer */, handler, sharedLog)
         val pw = PrintWriter(System.out)
         skDestroylistener.dump(pw)
 
diff --git a/staticlibs/testutils/devicetests/com/android/testutils/ConnectivityDiagnosticsCollector.kt b/staticlibs/testutils/devicetests/com/android/testutils/ConnectivityDiagnosticsCollector.kt
index c7d6850..4b9429b 100644
--- a/staticlibs/testutils/devicetests/com/android/testutils/ConnectivityDiagnosticsCollector.kt
+++ b/staticlibs/testutils/devicetests/com/android/testutils/ConnectivityDiagnosticsCollector.kt
@@ -430,19 +430,32 @@
      * @param dumpsysCmd The dumpsys command to run (for example "connectivity").
      * @param exceptionContext An exception to write a stacktrace to the dump for context.
      */
-    fun collectDumpsys(dumpsysCmd: String, exceptionContext: Throwable? = null) {
-        Log.i(TAG, "Collecting dumpsys $dumpsysCmd for test artifacts")
+    fun collectDumpsys(dumpsysCmd: String, exceptionContext: Throwable? = null) =
+        collectCommandOutput("dumpsys $dumpsysCmd", exceptionContext = exceptionContext)
+
+    /**
+     * Add the output of a command to the test data dump.
+     *
+     * <p>The output will be collected immediately, and exported to a test artifact file when the
+     * test ends.
+     * @param cmd The command to run. Stdout of the command will be collected.
+     * @param shell The shell to run the command in.
+     * @param exceptionContext An exception to write a stacktrace to the dump for context.
+     */
+    fun collectCommandOutput(
+        cmd: String,
+        shell: String = "sh",
+        exceptionContext: Throwable? = null
+    ) {
+        Log.i(TAG, "Collecting '$cmd' for test artifacts")
         PrintWriter(buffer).let {
-            it.println("--- Dumpsys $dumpsysCmd at ${ZonedDateTime.now()} ---")
+            it.println("--- $cmd at ${ZonedDateTime.now()} ---")
             maybeWriteExceptionContext(it, exceptionContext)
             it.flush()
         }
-        ParcelFileDescriptor.AutoCloseInputStream(
-            InstrumentationRegistry.getInstrumentation().uiAutomation.executeShellCommand(
-                "dumpsys $dumpsysCmd"
-            )
-        ).use {
-            it.copyTo(buffer)
+
+        runCommandInShell(cmd, shell) { stdout, _ ->
+            stdout.copyTo(buffer)
         }
     }
 
diff --git a/staticlibs/testutils/devicetests/com/android/testutils/PollingUtils.kt b/staticlibs/testutils/devicetests/com/android/testutils/PollingUtils.kt
new file mode 100644
index 0000000..a6e7ead
--- /dev/null
+++ b/staticlibs/testutils/devicetests/com/android/testutils/PollingUtils.kt
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2025 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.testutils
+
+private const val POLLING_INTERVAL_MS: Int = 100
+
+/** Calls condition() until it returns true or timeout occurs. */
+fun pollingCheck(timeout_ms: Long, condition: () -> Boolean): Boolean {
+    var polling_time = 0
+    do {
+        Thread.sleep(POLLING_INTERVAL_MS.toLong())
+        polling_time += POLLING_INTERVAL_MS
+        if (condition()) return true
+    } while (polling_time < timeout_ms)
+    return false
+}
diff --git a/staticlibs/testutils/devicetests/com/android/testutils/SetFeatureFlagsRule.kt b/staticlibs/testutils/devicetests/com/android/testutils/SetFeatureFlagsRule.kt
index 7b970d3..0b239b4 100644
--- a/staticlibs/testutils/devicetests/com/android/testutils/SetFeatureFlagsRule.kt
+++ b/staticlibs/testutils/devicetests/com/android/testutils/SetFeatureFlagsRule.kt
@@ -68,10 +68,15 @@
      * If any `@FeatureFlag` annotation is found, it passes every feature flag's name
      * and enabled state into the user-specified lambda to apply custom actions.
      */
+    private val parameterizedRegexp = Regex("\\[\\d+\\]$")
     override fun apply(base: Statement, description: Description): Statement {
         return object : Statement() {
             override fun evaluate() {
-                val testMethod = description.testClass.getMethod(description.methodName)
+                // If the same class also uses Parameterized, depending on evaluation order the
+                // method names here may be synthetic method names, where [0] [1] or so are added
+                // at the end of the method name. Find the original method name.
+                val methodName = description.methodName.replace(parameterizedRegexp, "")
+                val testMethod = description.testClass.getMethod(methodName)
                 val featureFlagAnnotations = testMethod.getAnnotationsByType(
                     FeatureFlag::class.java
                 )
diff --git a/staticlibs/testutils/devicetests/com/android/testutils/ShellUtil.kt b/staticlibs/testutils/devicetests/com/android/testutils/ShellUtil.kt
new file mode 100644
index 0000000..fadc2ab
--- /dev/null
+++ b/staticlibs/testutils/devicetests/com/android/testutils/ShellUtil.kt
@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) 2025 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.
+ */
+
+@file:JvmName("ShellUtil")
+
+package com.android.testutils
+
+import android.app.UiAutomation
+import android.os.ParcelFileDescriptor.AutoCloseInputStream
+import android.os.ParcelFileDescriptor.AutoCloseOutputStream
+import androidx.test.platform.app.InstrumentationRegistry
+import java.io.InputStream
+
+/**
+ * Run a command in a shell.
+ *
+ * Compared to [UiAutomation.executeShellCommand], this allows running commands with pipes and
+ * redirections. [UiAutomation.executeShellCommand] splits the command on spaces regardless of
+ * quotes, so it is not able to run commands like `sh -c "echo 123 > some_file"`.
+ *
+ * @param cmd Shell command to run.
+ * @param shell Command used to run the shell.
+ * @param outputProcessor Function taking stdout, stderr as argument. The streams will be closed
+ *                        when this function returns.
+ * @return Result of [outputProcessor].
+ */
+fun <T> runCommandInShell(
+    cmd: String,
+    shell: String = "sh",
+    outputProcessor: (InputStream, InputStream) -> T,
+): T {
+    val (stdout, stdin, stderr) = InstrumentationRegistry.getInstrumentation().uiAutomation
+        .executeShellCommandRwe(shell)
+    AutoCloseOutputStream(stdin).bufferedWriter().use { it.write(cmd) }
+    AutoCloseInputStream(stdout).use { outStream ->
+        AutoCloseInputStream(stderr).use { errStream ->
+            return outputProcessor(outStream, errStream)
+        }
+    }
+}
+
+/**
+ * Run a command in a shell.
+ *
+ * Overload of [runCommandInShell] that reads and returns stdout as String.
+ */
+fun runCommandInShell(
+    cmd: String,
+    shell: String = "sh",
+) = runCommandInShell(cmd, shell) { stdout, _ ->
+    stdout.reader().use { it.readText() }
+}
+
+/**
+ * Run a command in a root shell.
+ *
+ * This is generally only usable on devices on which [DeviceInfoUtils.isDebuggable] is true.
+ * @see runCommandInShell
+ */
+fun runCommandInRootShell(
+    cmd: String
+) = runCommandInShell(cmd, shell = "su root sh")
diff --git a/staticlibs/testutils/host/python/apf_utils.py b/staticlibs/testutils/host/python/apf_utils.py
index 55ac860..49ffad6 100644
--- a/staticlibs/testutils/host/python/apf_utils.py
+++ b/staticlibs/testutils/host/python/apf_utils.py
@@ -162,14 +162,18 @@
   """
 
   # Run the "ip link" command and get its output.
-  ip_link_output = adb_utils.adb_shell(ad, f"ip link show {iface_name}")
+  ip_link_output = adb_utils.adb_shell(ad, f"ip link")
 
   # Regular expression to extract the MAC address.
   # Parse hardware address from ip link output like below:
+  # 45: rmnet29: <POINTOPOINT,MULTICAST,NOARP> mtu 1500 qdisc ...
+  #    link/ether 73:01:23:45:df:e3 brd ff:ff:ff:ff:ff:ff
   # 46: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq ...
   #    link/ether 72:05:77:82:21:e0 brd ff:ff:ff:ff:ff:ff
-  pattern = r"link/ether (([0-9a-fA-F]{2}:){5}[0-9a-fA-F]{2})"
-  match = re.search(pattern, ip_link_output)
+  # 47: wlan1: <BROADCAST,MULTICAST> mtu 1500 qdisc ...
+  #    link/ether 6a:16:81:ff:82:9b brd ff:ff:ff:ff:ff:ff"
+  pattern = rf"{iface_name}:.*?link/ether (([0-9a-fA-F]{{2}}:){{5}}[0-9a-fA-F]{{2}})"
+  match = re.search(pattern, ip_link_output, re.DOTALL)
 
   if match:
     return match.group(1).upper()  # Extract the MAC address string.
diff --git a/staticlibs/testutils/host/python/tether_utils.py b/staticlibs/testutils/host/python/tether_utils.py
index c63de1f..710f8a8 100644
--- a/staticlibs/testutils/host/python/tether_utils.py
+++ b/staticlibs/testutils/host/python/tether_utils.py
@@ -95,7 +95,9 @@
   hotspot_interface = server.startHotspot(test_ssid, test_passphrase)
 
   # Make the client connects to the hotspot.
-  client_network = client.connectToWifi(test_ssid, test_passphrase)
+  client_network = client.connectToWifi(
+      test_ssid, test_passphrase, upstream_type != UpstreamType.NONE
+  )
 
   return hotspot_interface, client_network
 
diff --git a/tests/common/java/android/net/NetworkAgentConfigTest.kt b/tests/common/java/android/net/NetworkAgentConfigTest.kt
index fe869f8..d640a73 100644
--- a/tests/common/java/android/net/NetworkAgentConfigTest.kt
+++ b/tests/common/java/android/net/NetworkAgentConfigTest.kt
@@ -20,7 +20,6 @@
 import androidx.test.runner.AndroidJUnit4
 import com.android.modules.utils.build.SdkLevel.isAtLeastS
 import com.android.modules.utils.build.SdkLevel.isAtLeastT
-import com.android.modules.utils.build.SdkLevel.isAtLeastV
 import com.android.testutils.ConnectivityModuleTest
 import com.android.testutils.assertParcelingIsLossless
 import org.junit.Assert.assertEquals
@@ -48,9 +47,6 @@
                 setLocalRoutesExcludedForVpn(true)
                 setVpnRequiresValidation(true)
             }
-            if (isAtLeastV()) {
-                setSkipNativeNetworkCreation(true)
-            }
         }.build()
         assertParcelingIsLossless(config)
     }
@@ -75,9 +71,6 @@
                 setLocalRoutesExcludedForVpn(true)
                 setVpnRequiresValidation(true)
             }
-            if (isAtLeastV()) {
-                setSkipNativeNetworkCreation(true)
-            }
         }.build()
 
         assertTrue(config.isExplicitlySelected())
@@ -86,9 +79,6 @@
         assertFalse(config.isPartialConnectivityAcceptable())
         assertTrue(config.isUnvalidatedConnectivityAcceptable())
         assertEquals("TEST_NETWORK", config.getLegacyTypeName())
-        if (isAtLeastV()) {
-            assertTrue(config.shouldSkipNativeNetworkCreation())
-        }
         if (isAtLeastT()) {
             assertTrue(config.areLocalRoutesExcludedForVpn())
             assertTrue(config.isVpnValidationRequired())
diff --git a/tests/cts/hostside/Android.bp b/tests/cts/hostside/Android.bp
index 0ac9ce1..0b4375a 100644
--- a/tests/cts/hostside/Android.bp
+++ b/tests/cts/hostside/Android.bp
@@ -27,7 +27,7 @@
     // Note that some of the test helper apps (e.g., CtsHostsideNetworkCapTestsAppSdk33) override
     // this with older SDK versions.
     // Also note that unlike android_test targets, "current" does not work: the target SDK is set to
-    // something like "VanillaIceCream" instead of 100000. This means that the tests will not run on
+    // something like "VanillaIceCream" instead of 10000. This means that the tests will not run on
     // released devices with errors such as "Requires development platform VanillaIceCream but this
     // is a release platform".
     target_sdk_version: "10000",
diff --git a/tests/cts/hostside/app/src/com/android/cts/net/hostside/VpnTest.java b/tests/cts/hostside/app/src/com/android/cts/net/hostside/VpnTest.java
index 3430196..d55df6f 100755
--- a/tests/cts/hostside/app/src/com/android/cts/net/hostside/VpnTest.java
+++ b/tests/cts/hostside/app/src/com/android/cts/net/hostside/VpnTest.java
@@ -1843,11 +1843,11 @@
         final DetailedBlockedStatusCallback remoteUidCallback = new DetailedBlockedStatusCallback();
 
         // Create a TUN interface
-        final FileDescriptor tunFd = runWithShellPermissionIdentity(() -> {
+        final ParcelFileDescriptor tunFd = runWithShellPermissionIdentity(() -> {
             final TestNetworkManager tnm = mTestContext.getSystemService(TestNetworkManager.class);
             final TestNetworkInterface iface = tnm.createTunInterface(List.of(
                     TEST_IP4_DST_ADDR, TEST_IP6_DST_ADDR));
-            return iface.getFileDescriptor().getFileDescriptor();
+            return iface.getFileDescriptor();
         }, MANAGE_TEST_NETWORKS);
 
         // Create a remote UDP socket
@@ -1861,7 +1861,7 @@
             remoteUidCallback.expectAvailableCallbacksWithBlockedReasonNone(network);
 
             // The remote UDP socket can receive packets coming from the TUN interface
-            checkBlockIncomingPacket(tunFd, remoteUdpFd, EXPECT_PASS);
+            checkBlockIncomingPacket(tunFd.getFileDescriptor(), remoteUdpFd, EXPECT_PASS);
 
             // Lockdown uid that has the remote UDP socket
             runWithShellPermissionIdentity(() -> {
@@ -1877,7 +1877,7 @@
             if (SdkLevel.isAtLeastT()) {
                 // On T and above, lockdown rule drop packets not coming from lo regardless of the
                 // VPN connectivity.
-                checkBlockIncomingPacket(tunFd, remoteUdpFd, EXPECT_BLOCK);
+                checkBlockIncomingPacket(tunFd.getFileDescriptor(), remoteUdpFd, EXPECT_BLOCK);
             }
 
             // Start the VPN that has default routes. This VPN should have interface filtering rule
@@ -1889,9 +1889,9 @@
                     null /* proxyInfo */, null /* underlyingNetworks */,
                     false /* isAlwaysMetered */);
 
-            checkBlockIncomingPacket(tunFd, remoteUdpFd, EXPECT_BLOCK);
+            checkBlockIncomingPacket(tunFd.getFileDescriptor(), remoteUdpFd, EXPECT_BLOCK);
         }, /* cleanup */ () -> {
-                Os.close(tunFd);
+                tunFd.close();
             }, /* cleanup */ () -> {
                 Os.close(remoteUdpFd);
             }, /* cleanup */ () -> {
diff --git a/tests/cts/multidevices/Android.bp b/tests/cts/multidevices/Android.bp
index a082a95..c730b86 100644
--- a/tests/cts/multidevices/Android.bp
+++ b/tests/cts/multidevices/Android.bp
@@ -42,9 +42,4 @@
         // Package the snippet with the mobly test
         ":connectivity_multi_devices_snippet",
     ],
-    version: {
-        py3: {
-            embedded_launcher: true,
-        },
-    },
 }
diff --git a/tests/cts/multidevices/snippet/ConnectivityMultiDevicesSnippet.kt b/tests/cts/multidevices/snippet/ConnectivityMultiDevicesSnippet.kt
index 6da7e9a..252052e 100644
--- a/tests/cts/multidevices/snippet/ConnectivityMultiDevicesSnippet.kt
+++ b/tests/cts/multidevices/snippet/ConnectivityMultiDevicesSnippet.kt
@@ -27,13 +27,11 @@
 import android.net.NetworkRequest
 import android.net.cts.util.CtsNetUtils
 import android.net.cts.util.CtsTetheringUtils
-import android.net.wifi.ScanResult
 import android.net.wifi.SoftApConfiguration
 import android.net.wifi.SoftApConfiguration.SECURITY_TYPE_WPA2_PSK
 import android.net.wifi.WifiConfiguration
 import android.net.wifi.WifiInfo
 import android.net.wifi.WifiManager
-import android.net.wifi.WifiNetworkSpecifier
 import android.net.wifi.WifiSsid
 import androidx.test.platform.app.InstrumentationRegistry
 import com.android.compatibility.common.util.PropertyUtil
@@ -109,10 +107,7 @@
     // Suppress warning because WifiManager methods to connect to a config are
     // documented not to be deprecated for privileged users.
     @Suppress("DEPRECATION")
-    fun connectToWifi(ssid: String, passphrase: String): Long {
-        val specifier = WifiNetworkSpecifier.Builder()
-            .setBand(ScanResult.WIFI_BAND_24_GHZ)
-            .build()
+    fun connectToWifi(ssid: String, passphrase: String, requireValidation: Boolean): Long {
         val wifiConfig = WifiConfiguration()
         wifiConfig.SSID = "\"" + ssid + "\""
         wifiConfig.preSharedKey = "\"" + passphrase + "\""
@@ -141,7 +136,8 @@
             return@runAsShell networkCallback.eventuallyExpect<CapabilitiesChanged> {
                 // Remove double quotes.
                 val ssidFromCaps = (WifiInfo::sanitizeSsid)(it.caps.ssid)
-                ssidFromCaps == ssid && it.caps.hasCapability(NET_CAPABILITY_VALIDATED)
+                ssidFromCaps == ssid && (!requireValidation ||
+                        it.caps.hasCapability(NET_CAPABILITY_VALIDATED))
             }.network.networkHandle
         }
     }
diff --git a/tests/cts/multidevices/snippet/Wifip2pMultiDevicesSnippet.kt b/tests/cts/multidevices/snippet/Wifip2pMultiDevicesSnippet.kt
index f8c9351..3816537 100644
--- a/tests/cts/multidevices/snippet/Wifip2pMultiDevicesSnippet.kt
+++ b/tests/cts/multidevices/snippet/Wifip2pMultiDevicesSnippet.kt
@@ -21,8 +21,8 @@
 import android.content.Context
 import android.content.Intent
 import android.content.IntentFilter
+import android.content.pm.PackageManager.FEATURE_WIFI_DIRECT
 import android.net.MacAddress
-import android.net.wifi.WifiManager
 import android.net.wifi.p2p.WifiP2pConfig
 import android.net.wifi.p2p.WifiP2pDevice
 import android.net.wifi.p2p.WifiP2pDeviceList
@@ -44,10 +44,6 @@
 
 class Wifip2pMultiDevicesSnippet : Snippet {
     private val context by lazy { InstrumentationRegistry.getInstrumentation().getTargetContext() }
-    private val wifiManager by lazy {
-        context.getSystemService(WifiManager::class.java)
-                ?: fail("Could not get WifiManager service")
-    }
     private val wifip2pManager by lazy {
         context.getSystemService(WifiP2pManager::class.java)
                 ?: fail("Could not get WifiP2pManager service")
@@ -84,7 +80,7 @@
     }
 
     @Rpc(description = "Check whether the device supports Wi-Fi P2P.")
-    fun isP2pSupported() = wifiManager.isP2pSupported()
+    fun isP2pSupported() = context.packageManager.hasSystemFeature(FEATURE_WIFI_DIRECT)
 
     @Rpc(description = "Start Wi-Fi P2P")
     fun startWifiP2p() {
diff --git a/tests/cts/net/src/android/net/cts/ApfIntegrationTest.kt b/tests/cts/net/src/android/net/cts/ApfIntegrationTest.kt
index 9379697..2a372ce 100644
--- a/tests/cts/net/src/android/net/cts/ApfIntegrationTest.kt
+++ b/tests/cts/net/src/android/net/cts/ApfIntegrationTest.kt
@@ -19,8 +19,6 @@
 
 package android.net.cts
 
-import android.Manifest.permission.WRITE_ALLOWLISTED_DEVICE_CONFIG
-import android.Manifest.permission.WRITE_DEVICE_CONFIG
 import android.content.pm.PackageManager.FEATURE_AUTOMOTIVE
 import android.content.pm.PackageManager.FEATURE_LEANBACK
 import android.content.pm.PackageManager.FEATURE_WIFI
@@ -52,11 +50,9 @@
 import android.os.Handler
 import android.os.HandlerThread
 import android.os.PowerManager
-import android.os.UserManager
 import android.os.SystemProperties
+import android.os.UserManager
 import android.platform.test.annotations.AppModeFull
-import android.provider.DeviceConfig
-import android.provider.DeviceConfig.NAMESPACE_CONNECTIVITY
 import android.system.Os
 import android.system.OsConstants
 import android.system.OsConstants.AF_INET6
@@ -90,7 +86,7 @@
 import com.android.testutils.RecorderCallback.CallbackEntry.LinkPropertiesChanged
 import com.android.testutils.SkipPresubmit
 import com.android.testutils.TestableNetworkCallback
-import com.android.testutils.runAsShell
+import com.android.testutils.pollingCheck
 import com.android.testutils.waitForIdle
 import com.google.common.truth.Expect
 import com.google.common.truth.Truth.assertThat
@@ -116,8 +112,6 @@
 
 private const val TAG = "ApfIntegrationTest"
 private const val TIMEOUT_MS = 2000L
-private const val APF_NEW_RA_FILTER_VERSION = "apf_new_ra_filter_version"
-private const val POLLING_INTERVAL_MS: Int = 100
 private const val RCV_BUFFER_SIZE = 1480
 private const val PING_HEADER_LENGTH = 8
 
@@ -135,16 +129,6 @@
         private val powerManager = context.getSystemService(PowerManager::class.java)!!
         private val wakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG)
 
-        fun pollingCheck(condition: () -> Boolean, timeout_ms: Int): Boolean {
-            var polling_time = 0
-            do {
-                Thread.sleep(POLLING_INTERVAL_MS.toLong())
-                polling_time += POLLING_INTERVAL_MS
-                if (condition()) return true
-            } while (polling_time < timeout_ms)
-            return false
-        }
-
         fun turnScreenOff() {
             if (!wakeLock.isHeld()) wakeLock.acquire()
             runShellCommandOrThrow("input keyevent KEYCODE_SLEEP")
@@ -166,7 +150,9 @@
                 // This is a workaround for b/366037029.
                 Thread.sleep(2000L)
             } else {
-                val result = pollingCheck({ powerManager.isInteractive() }, timeout_ms = 2000)
+                val result = pollingCheck(timeout_ms = 2000) {
+                    powerManager.isInteractive()
+                }
                 assertThat(result).isEqualTo(interactive)
             }
         }
@@ -192,16 +178,6 @@
             Thread.sleep(1000)
             // TODO: check that there is no active wifi network. Otherwise, ApfFilter has already been
             // created.
-            // APF adb cmds are only implemented in ApfFilter.java. Enable experiment to prevent
-            // LegacyApfFilter.java from being used.
-            runAsShell(WRITE_DEVICE_CONFIG, WRITE_ALLOWLISTED_DEVICE_CONFIG) {
-                DeviceConfig.setProperty(
-                        NAMESPACE_CONNECTIVITY,
-                        APF_NEW_RA_FILTER_VERSION,
-                        "1",  // value => force enabled
-                        false // makeDefault
-                )
-            }
         }
 
         @AfterClass
@@ -489,15 +465,15 @@
 
     fun ApfV4GeneratorBase<*>.addPassIfNotIcmpv6EchoReply() {
         // If not IPv6 -> PASS
-        addLoad16(R0, ETH_ETHERTYPE_OFFSET)
+        addLoad16intoR0(ETH_ETHERTYPE_OFFSET)
         addJumpIfR0NotEquals(ETH_P_IPV6.toLong(), BaseApfGenerator.PASS_LABEL)
 
         // If not ICMPv6 -> PASS
-        addLoad8(R0, IPV6_NEXT_HEADER_OFFSET)
+        addLoad8intoR0(IPV6_NEXT_HEADER_OFFSET)
         addJumpIfR0NotEquals(IPPROTO_ICMPV6.toLong(), BaseApfGenerator.PASS_LABEL)
 
         // If not echo reply -> PASS
-        addLoad8(R0, ICMP6_TYPE_OFFSET)
+        addLoad8intoR0(ICMP6_TYPE_OFFSET)
         addJumpIfR0NotEquals(0x81, BaseApfGenerator.PASS_LABEL)
     }
 
@@ -591,6 +567,13 @@
 
         val program = gen.generate()
         assertThat(program.size).isLessThan(counterRegion)
+        val randomProgram = ByteArray(1) { 0 } +
+                ByteArray(counterRegion - 1).also { Random.nextBytes(it) }
+        // There are known firmware bugs where they calculate the number of non-zero bytes within
+        // the program to determine the program length. Modify the test to first install a longer
+        // program before installing a program that do the program length check. This should help us
+        // catch these types of firmware bugs in CTS. (b/395545572)
+        installAndVerifyProgram(randomProgram)
         installAndVerifyProgram(program)
 
         // Trigger the program by sending a ping and waiting on the reply.
@@ -744,11 +727,11 @@
         //     transmit 3 ICMPv6 echo requests with random first byte
         //     increase DROPPED_IPV6_NS_REPLIED_NON_DAD counter
         //     drop
-        gen.addLoad16(R0, ETH_ETHERTYPE_OFFSET)
+        gen.addLoad16intoR0(ETH_ETHERTYPE_OFFSET)
                 .addJumpIfR0NotEquals(ETH_P_IPV6.toLong(), skipPacketLabel)
-                .addLoad8(R0, IPV6_NEXT_HEADER_OFFSET)
+                .addLoad8intoR0(IPV6_NEXT_HEADER_OFFSET)
                 .addJumpIfR0NotEquals(IPPROTO_ICMPV6.toLong(), skipPacketLabel)
-                .addLoad8(R0, ICMP6_TYPE_OFFSET)
+                .addLoad8intoR0(ICMP6_TYPE_OFFSET)
                 .addJumpIfR0NotEquals(ICMP6_ECHO_REPLY.toLong(), skipPacketLabel)
                 .addLoadFromMemory(R0, MemorySlot.PACKET_SIZE)
                 .addCountAndPassIfR0Equals(
diff --git a/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java b/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java
index aa7d618..87c2b9e 100644
--- a/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java
+++ b/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java
@@ -90,7 +90,6 @@
 import static android.net.NetworkCapabilities.TRANSPORT_VPN;
 import static android.net.NetworkCapabilities.TRANSPORT_WIFI;
 import static android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK;
-import static android.net.cts.util.CtsNetUtils.ConnectivityActionReceiver;
 import static android.net.cts.util.CtsNetUtils.HTTP_PORT;
 import static android.net.cts.util.CtsNetUtils.NETWORK_CALLBACK_ACTION;
 import static android.net.cts.util.CtsNetUtils.TEST_HOST;
@@ -111,6 +110,7 @@
 import static com.android.networkstack.apishim.ConstantsShim.BLOCKED_REASON_LOCKDOWN_VPN;
 import static com.android.networkstack.apishim.ConstantsShim.BLOCKED_REASON_NONE;
 import static com.android.networkstack.apishim.ConstantsShim.RECEIVER_EXPORTED;
+import static com.android.networkstack.apishim.ConstantsShim.RECEIVER_NOT_EXPORTED;
 import static com.android.testutils.Cleanup.testAndCleanup;
 import static com.android.testutils.DevSdkIgnoreRuleKt.SC_V2;
 import static com.android.testutils.MiscAsserts.assertEventuallyTrue;
@@ -178,6 +178,7 @@
 import android.os.Binder;
 import android.os.Build;
 import android.os.Bundle;
+import android.os.ConditionVariable;
 import android.os.Handler;
 import android.os.Looper;
 import android.os.MessageQueue;
@@ -1229,42 +1230,43 @@
      * {@link #testRegisterNetworkCallback} except that a {@code PendingIntent} is used instead
      * of a {@code NetworkCallback}.
      */
-    @AppModeFull(reason = "Cannot get WifiManager in instant app mode")
     @Test
+    // This test is flaky before aosp/3482151 which fixed the issue in the ConnectivityService
+    // code. Unfortunately this means T can't be fixed, so don't run this test with a module
+    // that hasn't been updated.
+    @ConnectivityModuleTest
     public void testRegisterNetworkCallback_withPendingIntent() {
-        assumeTrue(mPackageManager.hasSystemFeature(FEATURE_WIFI));
+        final ConditionVariable received = new ConditionVariable();
 
-        // Create a ConnectivityActionReceiver that has an IntentFilter for our locally defined
-        // action, NETWORK_CALLBACK_ACTION.
-        final IntentFilter filter = new IntentFilter();
-        filter.addAction(NETWORK_CALLBACK_ACTION);
+        // Register a callback with intent and a request for any Internet-providing network,
+        // which should match the currently connected network.
+        final BroadcastReceiver receiver = new BroadcastReceiver() {
+            @Override
+            public void onReceive(final Context context, final Intent intent) {
+                received.open();
+            }
+        };
 
-        final ConnectivityActionReceiver receiver = new ConnectivityActionReceiver(
-                mCm, ConnectivityManager.TYPE_WIFI, NetworkInfo.State.CONNECTED);
-        final int flags = SdkLevel.isAtLeastT() ? RECEIVER_EXPORTED : 0;
-        mContext.registerReceiver(receiver, filter, flags);
+        final int flags = SdkLevel.isAtLeastT() ? RECEIVER_NOT_EXPORTED : 0;
+        mContext.registerReceiver(receiver, new IntentFilter(NETWORK_CALLBACK_ACTION), flags);
 
         // Create a broadcast PendingIntent for NETWORK_CALLBACK_ACTION.
         final Intent intent = new Intent(NETWORK_CALLBACK_ACTION)
                 .setPackage(mContext.getPackageName());
-        // While ConnectivityService would put extra info such as network or request id before
-        // broadcasting the inner intent. The MUTABLE flag needs to be added accordingly.
         final PendingIntent pendingIntent = PendingIntent.getBroadcast(mContext, 0 /*requestCode*/,
                 intent, PendingIntent.FLAG_CANCEL_CURRENT | PendingIntent.FLAG_MUTABLE);
 
-        // We will register for a WIFI network being available or lost.
-        mCm.registerNetworkCallback(makeWifiNetworkRequest(), pendingIntent);
+        // Register for a network providing Internet being available or lost.
+        final NetworkRequest nr = new NetworkRequest.Builder()
+                .addCapability(NET_CAPABILITY_INTERNET)
+                .build();
+        mCm.registerNetworkCallback(nr, pendingIntent);
 
         try {
-            mCtsNetUtils.ensureWifiConnected();
-
-            // Now we expect to get the Intent delivered notifying of the availability of the wifi
-            // network even if it was already connected as a state-based action when the callback
-            // is registered.
-            assertTrue("Did not receive expected Intent " + intent + " for TRANSPORT_WIFI",
-                    receiver.waitForState());
-        } catch (InterruptedException e) {
-            fail("Broadcast receiver or NetworkCallback wait was interrupted.");
+            // Wait for delivery of the Intent notifying of the availability of the
+            // INTERNET-providing network. Test setup makes sure it's already connected.
+            assertTrue("Did not receive expected Intent " + intent + " for INTERNET",
+                    received.block(NETWORK_CALLBACK_TIMEOUT_MS));
         } finally {
             mCm.unregisterNetworkCallback(pendingIntent);
             pendingIntent.cancel();
@@ -1272,6 +1274,33 @@
         }
     }
 
+    // Up to R ConnectivityService can't be updated through mainline, and there was a bug
+    // where registering a callback with a canceled pending intent would crash the system.
+    @Test
+    // Running this test without aosp/3482151 will likely crash the device.
+    @ConnectivityModuleTest
+    @IgnoreUpTo(Build.VERSION_CODES.R)
+    public void testRegisterNetworkCallback_pendingIntent_classNotFound() {
+        final Intent intent = new Intent()
+                .setClassName(mContext.getPackageName(), "NonExistent");
+        final PendingIntent pi = PendingIntent.getActivity(mContext, /* requestCode */ 1,
+                intent, PendingIntent.FLAG_CANCEL_CURRENT | PendingIntent.FLAG_MUTABLE);
+
+        final NetworkRequest nr = new NetworkRequest.Builder()
+                .addCapability(NET_CAPABILITY_INTERNET)
+                .build();
+        try {
+            // Before the fix delivered through Mainline, this used to crash the system, because
+            // trying to send the pending intent would throw which would prompt ConnectivityService
+            // to release the wake lock, but it would still send a finished notification at which
+            // point CS would try to release the wake lock again and crash.
+            mCm.registerNetworkCallback(nr, pi);
+        } finally {
+            mCm.unregisterNetworkCallback(pi);
+            pi.cancel();
+        }
+    }
+
     private void runIdenticalPendingIntentsRequestTest(boolean useListen) throws Exception {
         assumeTrue(mPackageManager.hasSystemFeature(FEATURE_WIFI));
 
@@ -1377,12 +1406,20 @@
     }
 
     @AppModeFull(reason = "Cannot get WifiManager in instant app mode")
+    // This test is flaky before aosp/3482151 which fixed the issue in the ConnectivityService
+    // code. Unfortunately this means T can't be fixed, so don't run this test with a module
+    // that hasn't been updated.
+    @ConnectivityModuleTest
     @Test
     public void testRegisterNetworkRequest_identicalPendingIntents() throws Exception {
         runIdenticalPendingIntentsRequestTest(false /* useListen */);
     }
 
     @AppModeFull(reason = "Cannot get WifiManager in instant app mode")
+    // This test is flaky before aosp/3482151 which fixed the issue in the ConnectivityService
+    // code. Unfortunately this means T can't be fixed, so don't run this test with a module
+    // that hasn't been updated.
+    @ConnectivityModuleTest
     @Test
     public void testRegisterNetworkCallback_identicalPendingIntents() throws Exception {
         runIdenticalPendingIntentsRequestTest(true /* useListen */);
diff --git a/tests/cts/net/src/android/net/cts/DscpPolicyTest.kt b/tests/cts/net/src/android/net/cts/DscpPolicyTest.kt
index 1de4cf9..ceccf0b 100644
--- a/tests/cts/net/src/android/net/cts/DscpPolicyTest.kt
+++ b/tests/cts/net/src/android/net/cts/DscpPolicyTest.kt
@@ -44,6 +44,7 @@
 import android.net.RouteInfo
 import android.net.TestNetworkInterface
 import android.net.TestNetworkManager
+import android.net.TestNetworkManager.TestInterfaceRequest
 import android.net.cts.util.CtsNetUtils.TestNetworkCallback
 import android.os.HandlerThread
 import android.os.SystemClock
@@ -164,7 +165,11 @@
 
             // Only statically configure the IPv4 address; for IPv6, use the SLAAC generated
             // address.
-            iface = tnm.createTapInterface(arrayOf(LinkAddress(LOCAL_IPV4_ADDRESS, IP4_PREFIX_LEN)))
+            val req = TestInterfaceRequest.Builder()
+                    .setTap()
+                    .addLinkAddress(LinkAddress(LOCAL_IPV4_ADDRESS, IP4_PREFIX_LEN))
+                    .build()
+            iface = tnm.createTestInterface(req)
             assertNotNull(iface)
         }
 
diff --git a/tests/cts/net/src/android/net/cts/EthernetManagerTest.kt b/tests/cts/net/src/android/net/cts/EthernetManagerTest.kt
index 06f2075..9f32132 100644
--- a/tests/cts/net/src/android/net/cts/EthernetManagerTest.kt
+++ b/tests/cts/net/src/android/net/cts/EthernetManagerTest.kt
@@ -51,6 +51,7 @@
 import android.net.StaticIpConfiguration
 import android.net.TestNetworkInterface
 import android.net.TestNetworkManager
+import android.net.TestNetworkManager.TestInterfaceRequest
 import android.net.cts.EthernetManagerTest.EthernetStateListener.CallbackEntry.EthernetStateChanged
 import android.net.cts.EthernetManagerTest.EthernetStateListener.CallbackEntry.InterfaceStateChanged
 import android.os.Build
@@ -169,7 +170,12 @@
                 // false, it is subsequently disabled. This means that the interface may briefly get
                 // link. With IPv6 provisioning delays (RS delay and DAD) disabled, this can cause
                 // tests that expect no network to come up when hasCarrier is false to become flaky.
-                tnm.createTapInterface(hasCarrier, false /* bringUp */)
+                val req = TestInterfaceRequest.Builder()
+                        .setTap()
+                        .setHasCarrier(hasCarrier)
+                        .setBringUp(false)
+                        .build()
+                tnm.createTestInterface(req)
             }
             val mtu = tapInterface.mtu
             packetReader = PollPacketReader(
diff --git a/tests/cts/net/src/android/net/cts/IpSecManagerTest.java b/tests/cts/net/src/android/net/cts/IpSecManagerTest.java
index e94d94f..4a21f09 100644
--- a/tests/cts/net/src/android/net/cts/IpSecManagerTest.java
+++ b/tests/cts/net/src/android/net/cts/IpSecManagerTest.java
@@ -375,6 +375,7 @@
     }
 
     private static boolean isIpv6UdpEncapSupportedByKernel() {
+        if (SdkLevel.isAtLeastB() && isKernelVersionAtLeast("5.10.0")) return true;
         return isKernelVersionAtLeast("5.15.31")
                 || (isKernelVersionAtLeast("5.10.108") && !isKernelVersionAtLeast("5.15.0"));
     }
@@ -390,8 +391,8 @@
         assumeTrue("Not supported by kernel", isIpv6UdpEncapSupportedByKernel());
     }
 
-    // TODO: b/319532485 Figure out whether to support x86_32
     private static boolean isRequestTransformStateSupportedByKernel() {
+        if (SdkLevel.isAtLeastB()) return true;
         return NetworkUtils.isKernel64Bit() || !NetworkUtils.isKernelX86();
     }
 
diff --git a/tests/cts/net/src/android/net/cts/NetworkReservationTest.kt b/tests/cts/net/src/android/net/cts/NetworkReservationTest.kt
index f05bf15..f43b927 100644
--- a/tests/cts/net/src/android/net/cts/NetworkReservationTest.kt
+++ b/tests/cts/net/src/android/net/cts/NetworkReservationTest.kt
@@ -16,15 +16,23 @@
 
 package android.net.cts
 
+import android.Manifest.permission.CONNECTIVITY_USE_RESTRICTED_NETWORKS
 import android.Manifest.permission.MANAGE_TEST_NETWORKS
 import android.Manifest.permission.NETWORK_SETTINGS
+import android.bluetooth.BluetoothManager
+import android.content.pm.PackageManager.FEATURE_BLUETOOTH_LE
 import android.net.ConnectivityManager
+import android.net.L2capNetworkSpecifier
+import android.net.L2capNetworkSpecifier.HEADER_COMPRESSION_6LOWPAN
+import android.net.L2capNetworkSpecifier.ROLE_SERVER
 import android.net.NetworkCapabilities
 import android.net.NetworkCapabilities.NET_CAPABILITY_INTERNET
 import android.net.NetworkCapabilities.NET_CAPABILITY_NOT_CONGESTED
+import android.net.NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED
 import android.net.NetworkCapabilities.NET_CAPABILITY_NOT_VCN_MANAGED
 import android.net.NetworkCapabilities.NET_CAPABILITY_TRUSTED
 import android.net.NetworkCapabilities.RES_ID_MATCH_ALL_RESERVATIONS
+import android.net.NetworkCapabilities.TRANSPORT_BLUETOOTH
 import android.net.NetworkCapabilities.TRANSPORT_ETHERNET
 import android.net.NetworkCapabilities.TRANSPORT_TEST
 import android.net.NetworkProvider
@@ -35,6 +43,7 @@
 import android.os.HandlerThread
 import android.platform.test.annotations.AppModeFull
 import androidx.test.platform.app.InstrumentationRegistry
+import com.android.compatibility.common.util.SystemUtil.runShellCommandOrThrow
 import com.android.testutils.ConnectivityModuleTest
 import com.android.testutils.DevSdkIgnoreRule
 import com.android.testutils.DevSdkIgnoreRunner
@@ -42,9 +51,15 @@
 import com.android.testutils.RecorderCallback.CallbackEntry.Unavailable
 import com.android.testutils.TestableNetworkCallback
 import com.android.testutils.TestableNetworkOfferCallback
+import com.android.testutils.pollingCheck
 import com.android.testutils.runAsShell
+import kotlin.test.assertContains
 import kotlin.test.assertEquals
+import kotlin.test.assertNotNull
+import kotlin.test.assertNull
+import kotlin.test.assertTrue
 import org.junit.After
+import org.junit.Assume.assumeTrue
 import org.junit.Before
 import org.junit.Test
 import org.junit.runner.RunWith
@@ -83,6 +98,10 @@
     private val handler = Handler(handlerThread.looper)
     private val provider = NetworkProvider(context, handlerThread.looper, TAG)
 
+    private val registeredCallbacks = ArrayList<TestableNetworkCallback>()
+    private val bm = context.getSystemService(BluetoothManager::class.java)!!
+    private var disableBluetoothInTearDown = false
+
     @Before
     fun setUp() {
         runAsShell(NETWORK_SETTINGS) {
@@ -90,20 +109,60 @@
         }
     }
 
+    private fun enableBluetooth() {
+        val adapter = bm.adapter
+        assertNotNull(adapter)
+        if (adapter.isEnabled()) return
+
+        runShellCommandOrThrow("svc bluetooth enable")
+        val bluetoothEnabled = pollingCheck(TIMEOUT_MS) {
+            adapter.isEnabled()
+        }
+        assertTrue(bluetoothEnabled)
+        // Only disable Bluetooth in tear down when it hasn't already been enabled.
+        disableBluetoothInTearDown = true
+    }
+
+    private fun disableBluetooth() {
+        // adapter can't actually be null here, because this function does not run unless
+        // disableBluetoothInTearDown is true. Just in case, refrain from throwing an exception in
+        // tearDown.
+        val adapter = bm.adapter
+        if (adapter == null) return
+
+        runShellCommandOrThrow("svc bluetooth disable")
+        // Wait for #isEnabled() to return false; ignore failures.
+        pollingCheck(TIMEOUT_MS) {
+            !adapter.isEnabled()
+        }
+    }
+
     @After
     fun tearDown() {
+        registeredCallbacks.forEach { cm.unregisterNetworkCallback(it) }
         runAsShell(NETWORK_SETTINGS) {
             // unregisterNetworkProvider unregisters all associated NetworkOffers.
             cm.unregisterNetworkProvider(provider)
         }
         handlerThread.quitSafely()
         handlerThread.join()
+
+        if (disableBluetoothInTearDown) {
+            disableBluetooth()
+        }
     }
 
     fun NetworkCapabilities.copyWithReservationId(resId: Int) = NetworkCapabilities(this).also {
         it.reservationId = resId
     }
 
+    fun reserveNetwork(nr: NetworkRequest): TestableNetworkCallback {
+        return TestableNetworkCallback().also {
+            cm.reserveNetwork(nr, handler, it)
+            registeredCallbacks.add(it)
+        }
+    }
+
     @Test
     fun testReserveNetwork() {
         // register blanket offer
@@ -112,8 +171,7 @@
             provider.registerNetworkOffer(NETWORK_SCORE, BLANKET_CAPS, handler::post, blanketOffer)
         }
 
-        val cb = TestableNetworkCallback()
-        cm.reserveNetwork(ETHERNET_REQUEST, handler, cb)
+        val cb = reserveNetwork(ETHERNET_REQUEST)
 
         // validate the reservation matches the blanket offer.
         val reservationReq = blanketOffer.expectOnNetworkNeeded(BLANKET_CAPS).request
@@ -137,4 +195,31 @@
         provider.unregisterNetworkOffer(reservedOffer)
         cb.expect<Unavailable>()
     }
+
+    @Test
+    fun testReserveL2capNetwork() {
+        assumeTrue(context.packageManager.hasSystemFeature(FEATURE_BLUETOOTH_LE))
+        enableBluetooth()
+
+        val l2capReservationSpecifier = L2capNetworkSpecifier.Builder()
+                .setRole(ROLE_SERVER)
+                .setHeaderCompression(HEADER_COMPRESSION_6LOWPAN)
+                .build()
+        val l2capRequest = NetworkRequest.Builder()
+                .addTransportType(TRANSPORT_BLUETOOTH)
+                .removeCapability(NET_CAPABILITY_TRUSTED)
+                .removeCapability(NET_CAPABILITY_NOT_RESTRICTED)
+                .setNetworkSpecifier(l2capReservationSpecifier)
+                .build()
+        val cb = runAsShell(CONNECTIVITY_USE_RESTRICTED_NETWORKS) {
+            reserveNetwork(l2capRequest)
+        }
+
+        val caps = cb.expect<Reserved>().caps
+        val reservedSpec = caps.networkSpecifier
+        assertTrue(reservedSpec is L2capNetworkSpecifier)
+        assertContains(0x80..0xFF, reservedSpec.psm, "PSM is outside of dynamic range")
+        assertEquals(HEADER_COMPRESSION_6LOWPAN, reservedSpec.headerCompression)
+        assertNull(reservedSpec.remoteAddress)
+    }
 }
diff --git a/tests/cts/net/util/java/android/net/cts/util/CtsTetheringUtils.java b/tests/cts/net/util/java/android/net/cts/util/CtsTetheringUtils.java
index 75b2814..27cba3a 100644
--- a/tests/cts/net/util/java/android/net/cts/util/CtsTetheringUtils.java
+++ b/tests/cts/net/util/java/android/net/cts/util/CtsTetheringUtils.java
@@ -160,11 +160,15 @@
         @Override
         public void onStopTetheringSucceeded() {
             mHistory.add(new CallbackValue.OnStopTetheringSucceeded());
+            // Call the parent method so that the coverage linter sees it: http://b/385014495
+            TetheringManager.StopTetheringCallback.super.onStopTetheringSucceeded();
         }
 
         @Override
         public void onStopTetheringFailed(final int error) {
             mHistory.add(new CallbackValue.OnStopTetheringFailed(error));
+            // Call the parent method so that the coverage linter sees it: http://b/385014495
+            TetheringManager.StopTetheringCallback.super.onStopTetheringFailed(error);
         }
 
         /**
diff --git a/tests/integration/src/com/android/server/net/integrationtests/ConnectivityServiceIntegrationTest.kt b/tests/integration/src/com/android/server/net/integrationtests/ConnectivityServiceIntegrationTest.kt
index 375d604..437eb81 100644
--- a/tests/integration/src/com/android/server/net/integrationtests/ConnectivityServiceIntegrationTest.kt
+++ b/tests/integration/src/com/android/server/net/integrationtests/ConnectivityServiceIntegrationTest.kt
@@ -55,12 +55,14 @@
 import com.android.networkstack.apishim.TelephonyManagerShimImpl
 import com.android.server.BpfNetMaps
 import com.android.server.ConnectivityService
+import com.android.server.L2capNetworkProvider
 import com.android.server.NetworkAgentWrapper
 import com.android.server.TestNetIdManager
 import com.android.server.connectivity.CarrierPrivilegeAuthenticator
 import com.android.server.connectivity.ConnectivityResources
 import com.android.server.connectivity.MockableSystemProperties
 import com.android.server.connectivity.MultinetworkPolicyTracker
+import com.android.server.connectivity.PermissionMonitor
 import com.android.server.connectivity.ProxyTracker
 import com.android.server.connectivity.SatelliteAccessController
 import com.android.testutils.DevSdkIgnoreRunner
@@ -221,7 +223,7 @@
     }
 
     private inner class TestConnectivityService(deps: Dependencies) : ConnectivityService(
-            context, dnsResolver, log, netd, deps)
+            context, dnsResolver, log, netd, deps, PermissionMonitorDependencies())
 
     private inner class TestDependencies : ConnectivityService.Dependencies() {
         override fun getNetworkStack() = networkStackClient
@@ -272,6 +274,12 @@
             connectivityServiceInternalHandler: Handler
         ): SatelliteAccessController? = mock(
             SatelliteAccessController::class.java)
+
+        override fun makeL2capNetworkProvider(context: Context) = null
+    }
+
+    private inner class PermissionMonitorDependencies : PermissionMonitor.Dependencies() {
+        override fun shouldEnforceLocalNetRestrictions(uid: Int) = false
     }
 
     @After
diff --git a/tests/unit/java/com/android/server/BpfNetMapsTest.java b/tests/unit/java/com/android/server/BpfNetMapsTest.java
index 73eb24d..caf1765 100644
--- a/tests/unit/java/com/android/server/BpfNetMapsTest.java
+++ b/tests/unit/java/com/android/server/BpfNetMapsTest.java
@@ -266,12 +266,26 @@
 
     @Test
     @IgnoreUpTo(Build.VERSION_CODES.VANILLA_ICE_CREAM)
+    public void testAddLocalNetAccessWithNullInterfaceAfterV() throws Exception {
+        assertTrue(mLocalNetAccessMap.isEmpty());
+
+        mBpfNetMaps.addLocalNetAccess(160, null,
+                Inet4Address.getByName("196.68.0.0"), 0, 0, true);
+
+        // As we tried to add null interface, it would be skipped and map should be empty.
+        assertTrue(mLocalNetAccessMap.isEmpty());
+    }
+
+    @Test
+    @IgnoreUpTo(Build.VERSION_CODES.VANILLA_ICE_CREAM)
     public void testAddLocalNetAccessAfterVWithIncorrectInterface() throws Exception {
         assertTrue(mLocalNetAccessMap.isEmpty());
 
+        // wlan2 is an incorrect interface
         mBpfNetMaps.addLocalNetAccess(160, "wlan2",
                 Inet4Address.getByName("196.68.0.0"), 0, 0, true);
 
+        // As we tried to add incorrect interface, it would be skipped and map should be empty.
         assertTrue(mLocalNetAccessMap.isEmpty());
     }
 
@@ -301,6 +315,79 @@
     }
 
     @Test
+    @IgnoreUpTo(Build.VERSION_CODES.VANILLA_ICE_CREAM)
+    public void testGetLocalNetAccessWithNullInterfaceAfterV() throws Exception {
+        assertTrue(mBpfNetMaps.getLocalNetAccess(160, null,
+                Inet4Address.getByName("100.68.0.0"), 0, 0));
+    }
+
+    @Test
+    @IgnoreAfter(Build.VERSION_CODES.VANILLA_ICE_CREAM)
+    public void testRemoveLocalNetAccessBeforeV() {
+        assertThrows(UnsupportedOperationException.class, () ->
+                mBpfNetMaps.removeLocalNetAccess(0, TEST_IF_NAME, Inet6Address.ANY, 0, 0));
+    }
+
+    @Test
+    @IgnoreUpTo(Build.VERSION_CODES.VANILLA_ICE_CREAM)
+    public void testRemoveLocalNetAccessAfterV() throws Exception {
+        assertTrue(mLocalNetAccessMap.isEmpty());
+
+        mBpfNetMaps.addLocalNetAccess(160, TEST_IF_NAME,
+                Inet4Address.getByName("196.68.0.0"), 0, 0, true);
+
+        assertNotNull(mLocalNetAccessMap.getValue(new LocalNetAccessKey(160, TEST_IF_INDEX,
+                Inet4Address.getByName("196.68.0.0"), 0, 0)));
+        assertNull(mLocalNetAccessMap.getValue(new LocalNetAccessKey(160, TEST_IF_INDEX,
+                Inet4Address.getByName("100.68.0.0"), 0, 0)));
+
+        mBpfNetMaps.removeLocalNetAccess(160, TEST_IF_NAME,
+                Inet4Address.getByName("196.68.0.0"), 0, 0);
+        assertNull(mLocalNetAccessMap.getValue(new LocalNetAccessKey(160, TEST_IF_INDEX,
+                Inet4Address.getByName("196.68.0.0"), 0, 0)));
+        assertNull(mLocalNetAccessMap.getValue(new LocalNetAccessKey(160, TEST_IF_INDEX,
+                Inet4Address.getByName("100.68.0.0"), 0, 0)));
+    }
+
+    @Test
+    @IgnoreUpTo(Build.VERSION_CODES.VANILLA_ICE_CREAM)
+    public void testRemoveLocalNetAccessAfterVWithIncorrectInterface() throws Exception {
+        assertTrue(mLocalNetAccessMap.isEmpty());
+
+        mBpfNetMaps.addLocalNetAccess(160, TEST_IF_NAME,
+                Inet4Address.getByName("196.68.0.0"), 0, 0, true);
+
+        assertNotNull(mLocalNetAccessMap.getValue(new LocalNetAccessKey(160, TEST_IF_INDEX,
+                Inet4Address.getByName("196.68.0.0"), 0, 0)));
+        assertNull(mLocalNetAccessMap.getValue(new LocalNetAccessKey(160, TEST_IF_INDEX,
+                Inet4Address.getByName("100.68.0.0"), 0, 0)));
+
+        mBpfNetMaps.removeLocalNetAccess(160, "wlan2",
+                Inet4Address.getByName("196.68.0.0"), 0, 0);
+        assertNotNull(mLocalNetAccessMap.getValue(new LocalNetAccessKey(160, TEST_IF_INDEX,
+                Inet4Address.getByName("196.68.0.0"), 0, 0)));
+    }
+
+    @Test
+    @IgnoreUpTo(Build.VERSION_CODES.VANILLA_ICE_CREAM)
+    public void testRemoveLocalNetAccessAfterVWithNullInterface() throws Exception {
+        assertTrue(mLocalNetAccessMap.isEmpty());
+
+        mBpfNetMaps.addLocalNetAccess(160, TEST_IF_NAME,
+                Inet4Address.getByName("196.68.0.0"), 0, 0, true);
+
+        assertNotNull(mLocalNetAccessMap.getValue(new LocalNetAccessKey(160, TEST_IF_INDEX,
+                Inet4Address.getByName("196.68.0.0"), 0, 0)));
+        assertNull(mLocalNetAccessMap.getValue(new LocalNetAccessKey(160, TEST_IF_INDEX,
+                Inet4Address.getByName("100.68.0.0"), 0, 0)));
+
+        mBpfNetMaps.removeLocalNetAccess(160, null,
+                Inet4Address.getByName("196.68.0.0"), 0, 0);
+        assertNotNull(mLocalNetAccessMap.getValue(new LocalNetAccessKey(160, TEST_IF_INDEX,
+                Inet4Address.getByName("196.68.0.0"), 0, 0)));
+    }
+
+    @Test
     @IgnoreAfter(Build.VERSION_CODES.VANILLA_ICE_CREAM)
     public void testAddUidToLocalNetBlockMapBeforeV() {
         assertThrows(UnsupportedOperationException.class, () ->
@@ -309,9 +396,9 @@
 
     @Test
     @IgnoreAfter(Build.VERSION_CODES.VANILLA_ICE_CREAM)
-    public void testIsUidPresentInLocalNetBlockMapBeforeV() {
+    public void testIsUidBlockedFromUsingLocalNetworkBeforeV() {
         assertThrows(UnsupportedOperationException.class, () ->
-                mBpfNetMaps.getUidValueFromLocalNetBlockMap(0));
+                mBpfNetMaps.isUidBlockedFromUsingLocalNetwork(0));
     }
 
     @Test
@@ -339,18 +426,18 @@
 
     @Test
     @IgnoreUpTo(Build.VERSION_CODES.VANILLA_ICE_CREAM)
-    public void testIsUidPresentInLocalNetBlockMapAfterV() throws Exception {
+    public void testIsUidBlockedFromUsingLocalNetworkAfterV() throws Exception {
         final int uid0 = TEST_UIDS[0];
         final int uid1 = TEST_UIDS[1];
 
         assertTrue(mLocalNetAccessMap.isEmpty());
 
         mLocalNetBlockedUidMap.updateEntry(new U32(uid0), new Bool(true));
-        assertTrue(mBpfNetMaps.getUidValueFromLocalNetBlockMap(uid0));
-        assertFalse(mBpfNetMaps.getUidValueFromLocalNetBlockMap(uid1));
+        assertTrue(mBpfNetMaps.isUidBlockedFromUsingLocalNetwork(uid0));
+        assertFalse(mBpfNetMaps.isUidBlockedFromUsingLocalNetwork(uid1));
 
         mLocalNetBlockedUidMap.updateEntry(new U32(uid1), new Bool(true));
-        assertTrue(mBpfNetMaps.getUidValueFromLocalNetBlockMap(uid1));
+        assertTrue(mBpfNetMaps.isUidBlockedFromUsingLocalNetwork(uid1));
     }
 
     @Test
diff --git a/tests/unit/java/com/android/server/ConnectivityServiceTest.java b/tests/unit/java/com/android/server/ConnectivityServiceTest.java
index f7d7c87..c4944b6 100755
--- a/tests/unit/java/com/android/server/ConnectivityServiceTest.java
+++ b/tests/unit/java/com/android/server/ConnectivityServiceTest.java
@@ -163,10 +163,7 @@
 import static android.telephony.DataConnectionRealTimeInfo.DC_POWER_STATE_HIGH;
 import static android.telephony.DataConnectionRealTimeInfo.DC_POWER_STATE_LOW;
 
-import static com.android.server.ConnectivityService.ALLOW_SATALLITE_NETWORK_FALLBACK;
 import static com.android.net.module.util.DeviceConfigUtils.TETHERING_MODULE_NAME;
-import static com.android.server.ConnectivityService.ALLOW_SYSUI_CONNECTIVITY_REPORTS;
-import static com.android.server.ConnectivityService.KEY_DESTROY_FROZEN_SOCKETS_VERSION;
 import static com.android.server.ConnectivityService.MAX_NETWORK_REQUESTS_PER_SYSTEM_UID;
 import static com.android.server.ConnectivityService.PREFERENCE_ORDER_MOBILE_DATA_PREFERERRED;
 import static com.android.server.ConnectivityService.PREFERENCE_ORDER_OEM;
@@ -177,9 +174,6 @@
 import static com.android.server.ConnectivityServiceTestUtils.transportToLegacyType;
 import static com.android.server.NetworkAgentWrapper.CallbackType.OnQosCallbackRegister;
 import static com.android.server.NetworkAgentWrapper.CallbackType.OnQosCallbackUnregister;
-import static com.android.server.connectivity.ConnectivityFlags.BACKGROUND_FIREWALL_CHAIN;
-import static com.android.server.connectivity.ConnectivityFlags.DELAY_DESTROY_SOCKETS;
-import static com.android.server.connectivity.ConnectivityFlags.INGRESS_TO_VPN_ADDRESS_FILTERING;
 import static com.android.testutils.Cleanup.testAndCleanup;
 import static com.android.testutils.ConcurrentUtils.await;
 import static com.android.testutils.ConcurrentUtils.durationOf;
@@ -412,6 +406,7 @@
 import com.android.server.ConnectivityService.NetworkRequestInfo;
 import com.android.server.ConnectivityServiceTest.ConnectivityServiceDependencies.DestroySocketsWrapper;
 import com.android.server.ConnectivityServiceTest.ConnectivityServiceDependencies.ReportedInterfaces;
+import com.android.server.L2capNetworkProvider;
 import com.android.server.connectivity.ApplicationSelfCertifiedNetworkCapabilities;
 import com.android.server.connectivity.AutomaticOnOffKeepaliveTracker;
 import com.android.server.connectivity.CarrierPrivilegeAuthenticator;
@@ -425,6 +420,7 @@
 import com.android.server.connectivity.NetworkAgentInfo;
 import com.android.server.connectivity.NetworkNotificationManager;
 import com.android.server.connectivity.NetworkNotificationManager.NotificationType;
+import com.android.server.connectivity.PermissionMonitor;
 import com.android.server.connectivity.ProxyTracker;
 import com.android.server.connectivity.QosCallbackTracker;
 import com.android.server.connectivity.SatelliteAccessController;
@@ -593,6 +589,7 @@
     private MockContext mServiceContext;
     private HandlerThread mCsHandlerThread;
     private ConnectivityServiceDependencies mDeps;
+    private PermissionMonitorDependencies mPermDeps;
     private AutomaticOnOffKeepaliveTrackerDependencies mAutoOnOffKeepaliveDependencies;
     private ConnectivityService mService;
     private WrappedConnectivityManager mCm;
@@ -1920,6 +1917,7 @@
         doReturn(mResources).when(mockResContext).getResources();
         ConnectivityResources.setResourcesContextForTest(mockResContext);
         mDeps = new ConnectivityServiceDependencies(mockResContext);
+        mPermDeps = new PermissionMonitorDependencies();
         doReturn(true).when(mMockKeepaliveTrackerDependencies)
                 .isAddressTranslationEnabled(mServiceContext);
         doReturn(new ConnectivityResources(mockResContext)).when(mMockKeepaliveTrackerDependencies)
@@ -1932,7 +1930,7 @@
                 mMockDnsResolver,
                 mock(IpConnectivityLog.class),
                 mMockNetd,
-                mDeps);
+                mDeps, mPermDeps);
         mService.mLingerDelayMs = TEST_LINGER_DELAY_MS;
         mService.mNascentDelayMs = TEST_NASCENT_DELAY_MS;
 
@@ -2181,28 +2179,30 @@
                 case ConnectivityFlags.REQUEST_RESTRICTED_WIFI:
                 case ConnectivityFlags.USE_DECLARED_METHODS_FOR_CALLBACKS:
                 case ConnectivityFlags.QUEUE_CALLBACKS_FOR_FROZEN_APPS:
-                case KEY_DESTROY_FROZEN_SOCKETS_VERSION:
+                case ConnectivityFlags.BACKGROUND_FIREWALL_CHAIN:
+                case ConnectivityService.KEY_DESTROY_FROZEN_SOCKETS_VERSION:
                     return true;
                 default:
-                    return super.isFeatureEnabled(context, name);
+                    // This is a unit test and must never depend on actual device flag values.
+                    throw new UnsupportedOperationException("Unknown flag " + name
+                            + ", update this test");
             }
         }
 
         @Override
         public boolean isFeatureNotChickenedOut(Context context, String name) {
             switch (name) {
-                case ALLOW_SYSUI_CONNECTIVITY_REPORTS:
-                    return true;
-                case ALLOW_SATALLITE_NETWORK_FALLBACK:
-                    return true;
-                case INGRESS_TO_VPN_ADDRESS_FILTERING:
-                    return true;
-                case BACKGROUND_FIREWALL_CHAIN:
-                    return true;
-                case DELAY_DESTROY_SOCKETS:
+                case ConnectivityService.ALLOW_SYSUI_CONNECTIVITY_REPORTS:
+                case ConnectivityService.ALLOW_SATALLITE_NETWORK_FALLBACK:
+                case ConnectivityFlags.INGRESS_TO_VPN_ADDRESS_FILTERING:
+                case ConnectivityFlags.BACKGROUND_FIREWALL_CHAIN:
+                case ConnectivityFlags.DELAY_DESTROY_SOCKETS:
+                case ConnectivityFlags.USE_DECLARED_METHODS_FOR_CALLBACKS:
+                case ConnectivityFlags.QUEUE_CALLBACKS_FOR_FROZEN_APPS:
                     return true;
                 default:
-                    return super.isFeatureNotChickenedOut(context, name);
+                    throw new UnsupportedOperationException("Unknown flag " + name
+                            + ", update this test");
             }
         }
 
@@ -2381,6 +2381,18 @@
             // Needed to mock out the dependency on DeviceConfig
             return 15;
         }
+
+        @Override
+        public L2capNetworkProvider makeL2capNetworkProvider(Context context) {
+            return null;
+        }
+    }
+
+    static class PermissionMonitorDependencies extends PermissionMonitor.Dependencies {
+        @Override
+        public boolean shouldEnforceLocalNetRestrictions(int uid) {
+            return false;
+        }
     }
 
     private class AutomaticOnOffKeepaliveTrackerDependencies
@@ -2431,6 +2443,10 @@
 
     @After
     public void tearDown() throws Exception {
+        // Don't attempt to tear down if setUp didn't even get as far as creating the service.
+        // Otherwise, exceptions here will mask the actual exception in setUp, making failures
+        // harder to diagnose.
+        if (mService == null) return;
         unregisterDefaultNetworkCallbacks();
         maybeTearDownEnterpriseNetwork();
         setAlwaysOnNetworks(false);
@@ -4024,7 +4040,7 @@
 
         mWiFiAgent = new TestNetworkAgentWrapper(TRANSPORT_WIFI, callbacks);
 
-        if (mService.shouldCreateNetworksImmediately()) {
+        if (mService.shouldCreateNetworksImmediately(mWiFiAgent.getNetworkCapabilities())) {
             assertEquals("onNetworkCreated", eventOrder.poll(TIMEOUT_MS, TimeUnit.MILLISECONDS));
         } else {
             assertNull(eventOrder.poll());
@@ -4037,7 +4053,7 @@
         // connected.
         // TODO: fix this bug, file the request before connecting, and remove the waitForIdle.
         mWiFiAgent.connectWithoutInternet();
-        if (!mService.shouldCreateNetworksImmediately()) {
+        if (!mService.shouldCreateNetworksImmediately(mWiFiAgent.getNetworkCapabilities())) {
             assertEquals("onNetworkCreated", eventOrder.poll(TIMEOUT_MS, TimeUnit.MILLISECONDS));
         } else {
             waitForIdle();
@@ -7925,8 +7941,8 @@
         // Simple connection with initial LP should have updated ifaces.
         mCellAgent.connect(false);
         waitForIdle();
-        List<Network> allNetworks = mService.shouldCreateNetworksImmediately()
-                ? cellAndWifi() : onlyCell();
+        List<Network> allNetworks = mService.shouldCreateNetworksImmediately(
+                mCellAgent.getNetworkCapabilities()) ? cellAndWifi() : onlyCell();
         expectNotifyNetworkStatus(allNetworks, onlyCell(), MOBILE_IFNAME);
         reset(mStatsManager);
 
@@ -8238,7 +8254,7 @@
         mCellAgent = new TestNetworkAgentWrapper(TRANSPORT_CELLULAR);
         final int netId = mCellAgent.getNetwork().netId;
         waitForIdle();
-        if (mService.shouldCreateNetworksImmediately()) {
+        if (mService.shouldCreateNetworksImmediately(mCellAgent.getNetworkCapabilities())) {
             verify(mMockDnsResolver, times(1)).createNetworkCache(netId);
         } else {
             verify(mMockDnsResolver, never()).setResolverConfiguration(any());
@@ -8258,7 +8274,7 @@
         mCellAgent.sendLinkProperties(cellLp);
         mCellAgent.connect(false);
         waitForIdle();
-        if (!mService.shouldCreateNetworksImmediately()) {
+        if (!mService.shouldCreateNetworksImmediately(mCellAgent.getNetworkCapabilities())) {
             // CS tells dnsresolver about the empty DNS config for this network.
             verify(mMockDnsResolver, times(1)).createNetworkCache(netId);
         }
@@ -8381,7 +8397,7 @@
         mCellAgent = new TestNetworkAgentWrapper(TRANSPORT_CELLULAR);
         final int netId = mCellAgent.getNetwork().netId;
         waitForIdle();
-        if (mService.shouldCreateNetworksImmediately()) {
+        if (mService.shouldCreateNetworksImmediately(mCellAgent.getNetworkCapabilities())) {
             verify(mMockDnsResolver, times(1)).createNetworkCache(netId);
         } else {
             verify(mMockDnsResolver, never()).setResolverConfiguration(any());
@@ -8404,7 +8420,7 @@
         mCellAgent.sendLinkProperties(cellLp);
         mCellAgent.connect(false);
         waitForIdle();
-        if (!mService.shouldCreateNetworksImmediately()) {
+        if (!mService.shouldCreateNetworksImmediately(mCellAgent.getNetworkCapabilities())) {
             verify(mMockDnsResolver, times(1)).createNetworkCache(netId);
         }
         verify(mMockDnsResolver, atLeastOnce()).setResolverConfiguration(
@@ -16049,13 +16065,13 @@
 
         final TestNetworkAgentWrapper workAgent =
                 makeEnterpriseNetworkAgent(profileNetworkPreference.getPreferenceEnterpriseId());
-        if (mService.shouldCreateNetworksImmediately()) {
+        if (mService.shouldCreateNetworksImmediately(workAgent.getNetworkCapabilities())) {
             expectNativeNetworkCreated(workAgent.getNetwork().netId, INetd.PERMISSION_SYSTEM,
                     null /* iface */, inOrder);
         }
         if (connectWorkProfileAgentAhead) {
             workAgent.connect(false);
-            if (!mService.shouldCreateNetworksImmediately()) {
+            if (!mService.shouldCreateNetworksImmediately(workAgent.getNetworkCapabilities())) {
                 expectNativeNetworkCreated(workAgent.getNetwork().netId, INetd.PERMISSION_SYSTEM,
                         null /* iface */, inOrder);
             }
@@ -16098,7 +16114,7 @@
 
         if (!connectWorkProfileAgentAhead) {
             workAgent.connect(false);
-            if (!mService.shouldCreateNetworksImmediately()) {
+            if (!mService.shouldCreateNetworksImmediately(workAgent.getNetworkCapabilities())) {
                 inOrder.verify(mMockNetd).networkCreate(
                         nativeNetworkConfigPhysical(workAgent.getNetwork().netId,
                                 INetd.PERMISSION_SYSTEM));
@@ -18809,7 +18825,7 @@
     }
 
     private void verifyMtuSetOnWifiInterfaceOnlyUpToT(int mtu) throws Exception {
-        if (!mService.shouldCreateNetworksImmediately()) {
+        if (!mService.shouldCreateNetworksImmediately(mWiFiAgent.getNetworkCapabilities())) {
             verify(mMockNetd, times(1)).interfaceSetMtu(WIFI_IFNAME, mtu);
         } else {
             verify(mMockNetd, never()).interfaceSetMtu(eq(WIFI_IFNAME), anyInt());
@@ -18817,7 +18833,7 @@
     }
 
     private void verifyMtuSetOnWifiInterfaceOnlyStartingFromU(int mtu) throws Exception {
-        if (mService.shouldCreateNetworksImmediately()) {
+        if (mService.shouldCreateNetworksImmediately(mWiFiAgent.getNetworkCapabilities())) {
             verify(mMockNetd, times(1)).interfaceSetMtu(WIFI_IFNAME, mtu);
         } else {
             verify(mMockNetd, never()).interfaceSetMtu(eq(WIFI_IFNAME), anyInt());
diff --git a/tests/unit/java/com/android/server/L2capNetworkProviderTest.kt b/tests/unit/java/com/android/server/L2capNetworkProviderTest.kt
deleted file mode 100644
index 49eb476..0000000
--- a/tests/unit/java/com/android/server/L2capNetworkProviderTest.kt
+++ /dev/null
@@ -1,233 +0,0 @@
-/*
- * Copyright (C) 2024 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.server
-
-import android.bluetooth.BluetoothAdapter
-import android.bluetooth.BluetoothManager
-import android.bluetooth.BluetoothServerSocket
-import android.content.Context
-import android.content.pm.PackageManager
-import android.content.pm.PackageManager.FEATURE_BLUETOOTH_LE
-import android.net.ConnectivityManager
-import android.net.ConnectivityManager.TYPE_NONE
-import android.net.L2capNetworkSpecifier
-import android.net.L2capNetworkSpecifier.HEADER_COMPRESSION_6LOWPAN
-import android.net.L2capNetworkSpecifier.HEADER_COMPRESSION_NONE
-import android.net.L2capNetworkSpecifier.ROLE_SERVER
-import android.net.NetworkCapabilities
-import android.net.NetworkCapabilities.TRANSPORT_BLUETOOTH
-import android.net.NetworkProvider
-import android.net.NetworkProvider.NetworkOfferCallback
-import android.net.NetworkRequest
-import android.os.Build
-import android.os.Handler
-import android.os.HandlerThread
-import com.android.testutils.DevSdkIgnoreRule
-import com.android.testutils.DevSdkIgnoreRunner
-import com.android.testutils.waitForIdle
-import kotlin.test.assertTrue
-import org.junit.After
-import org.junit.Before
-import org.junit.Test
-import org.junit.runner.RunWith
-import org.mockito.ArgumentCaptor
-import org.mockito.ArgumentMatchers.any
-import org.mockito.ArgumentMatchers.eq
-import org.mockito.Mock
-import org.mockito.Mockito.any
-import org.mockito.Mockito.clearInvocations
-import org.mockito.Mockito.doReturn
-import org.mockito.Mockito.never
-import org.mockito.Mockito.times
-import org.mockito.Mockito.verify
-import org.mockito.MockitoAnnotations
-
-private const val TAG = "L2capNetworkProviderTest"
-private const val TIMEOUT_MS = 1000
-
-private val RESERVATION_CAPS = NetworkCapabilities.Builder.withoutDefaultCapabilities()
-    .addTransportType(TRANSPORT_BLUETOOTH)
-    .build()
-
-private val RESERVATION = NetworkRequest(
-        NetworkCapabilities(RESERVATION_CAPS),
-        TYPE_NONE,
-        42 /* rId */,
-        NetworkRequest.Type.RESERVATION
-)
-
-@RunWith(DevSdkIgnoreRunner::class)
-@DevSdkIgnoreRule.IgnoreUpTo(Build.VERSION_CODES.R)
-class L2capNetworkProviderTest {
-    @Mock private lateinit var context: Context
-    @Mock private lateinit var deps: L2capNetworkProvider.Dependencies
-    @Mock private lateinit var provider: NetworkProvider
-    @Mock private lateinit var cm: ConnectivityManager
-    @Mock private lateinit var pm: PackageManager
-    @Mock private lateinit var bm: BluetoothManager
-    @Mock private lateinit var adapter: BluetoothAdapter
-    @Mock private lateinit var serverSocket: BluetoothServerSocket
-
-    private val handlerThread = HandlerThread("$TAG handler thread").apply { start() }
-    private val handler = Handler(handlerThread.looper)
-
-    @Before
-    fun setUp() {
-        MockitoAnnotations.initMocks(this)
-        doReturn(provider).`when`(deps).getNetworkProvider(any(), any())
-        doReturn(handlerThread).`when`(deps).getHandlerThread()
-        doReturn(cm).`when`(context).getSystemService(eq(ConnectivityManager::class.java))
-        doReturn(pm).`when`(context).getPackageManager()
-        doReturn(true).`when`(pm).hasSystemFeature(FEATURE_BLUETOOTH_LE)
-
-        doReturn(bm).`when`(context).getSystemService(eq(BluetoothManager::class.java))
-        doReturn(adapter).`when`(bm).getAdapter()
-        doReturn(serverSocket).`when`(adapter).listenUsingInsecureL2capChannel()
-        doReturn(0x80).`when`(serverSocket).getPsm()
-    }
-
-    @After
-    fun tearDown() {
-        handlerThread.quitSafely()
-        handlerThread.join()
-    }
-
-    @Test
-    fun testNetworkProvider_registeredWhenSupported() {
-        L2capNetworkProvider(deps, context).start()
-        handlerThread.waitForIdle(TIMEOUT_MS)
-        verify(cm).registerNetworkProvider(eq(provider))
-        verify(provider).registerNetworkOffer(any(), any(), any(), any())
-    }
-
-    @Test
-    fun testNetworkProvider_notRegisteredWhenNotSupported() {
-        doReturn(false).`when`(pm).hasSystemFeature(FEATURE_BLUETOOTH_LE)
-        L2capNetworkProvider(deps, context).start()
-        handlerThread.waitForIdle(TIMEOUT_MS)
-        verify(cm, never()).registerNetworkProvider(eq(provider))
-    }
-
-    fun doTestBlanketOfferIgnoresRequest(request: NetworkRequest) {
-        clearInvocations(provider)
-        L2capNetworkProvider(deps, context).start()
-        handlerThread.waitForIdle(TIMEOUT_MS)
-
-        val blanketOfferCaptor = ArgumentCaptor.forClass(NetworkOfferCallback::class.java)
-        verify(provider).registerNetworkOffer(any(), any(), any(), blanketOfferCaptor.capture())
-
-        blanketOfferCaptor.value.onNetworkNeeded(request)
-        verify(provider).registerNetworkOffer(any(), any(), any(), any())
-    }
-
-    fun doTestBlanketOfferCreatesReservation(
-            request: NetworkRequest,
-            reservation: NetworkCapabilities
-    ) {
-        clearInvocations(provider)
-        L2capNetworkProvider(deps, context).start()
-        handlerThread.waitForIdle(TIMEOUT_MS)
-
-        val blanketOfferCaptor = ArgumentCaptor.forClass(NetworkOfferCallback::class.java)
-        verify(provider).registerNetworkOffer(any(), any(), any(), blanketOfferCaptor.capture())
-
-        blanketOfferCaptor.value.onNetworkNeeded(request)
-
-        val capsCaptor = ArgumentCaptor.forClass(NetworkCapabilities::class.java)
-        verify(provider, times(2)).registerNetworkOffer(any(), capsCaptor.capture(), any(), any())
-
-        assertTrue(reservation.satisfiedByNetworkCapabilities(capsCaptor.value))
-    }
-
-    @Test
-    fun testBlanketOffer_reservationWithoutSpecifier() {
-        val caps = NetworkCapabilities.Builder.withoutDefaultCapabilities()
-                .addTransportType(TRANSPORT_BLUETOOTH)
-                .build()
-        val nr = NetworkRequest(caps, TYPE_NONE, 42 /* rId */, NetworkRequest.Type.RESERVATION)
-
-        doTestBlanketOfferIgnoresRequest(nr)
-    }
-
-    @Test
-    fun testBlanketOffer_reservationWithCorrectSpecifier() {
-        var specifier = L2capNetworkSpecifier.Builder()
-                .setRole(ROLE_SERVER)
-                .setHeaderCompression(HEADER_COMPRESSION_6LOWPAN)
-                .build()
-        var caps = NetworkCapabilities.Builder.withoutDefaultCapabilities()
-                .addTransportType(TRANSPORT_BLUETOOTH)
-                .setNetworkSpecifier(specifier)
-                .build()
-        var nr = NetworkRequest(caps, TYPE_NONE, 42 /* rId */, NetworkRequest.Type.RESERVATION)
-        doTestBlanketOfferCreatesReservation(nr, caps)
-
-        specifier = L2capNetworkSpecifier.Builder()
-                .setRole(ROLE_SERVER)
-                .setHeaderCompression(HEADER_COMPRESSION_NONE)
-                .build()
-        caps = NetworkCapabilities.Builder.withoutDefaultCapabilities()
-                .addTransportType(TRANSPORT_BLUETOOTH)
-                .setNetworkSpecifier(specifier)
-                .build()
-        nr = NetworkRequest(caps, TYPE_NONE, 43 /* rId */, NetworkRequest.Type.RESERVATION)
-        doTestBlanketOfferCreatesReservation(nr, caps)
-    }
-
-    @Test
-    fun testBlanketOffer_reservationWithIncorrectSpecifier() {
-        var specifier = L2capNetworkSpecifier.Builder().build()
-        var caps = NetworkCapabilities.Builder.withoutDefaultCapabilities()
-                .addTransportType(TRANSPORT_BLUETOOTH)
-                .setNetworkSpecifier(specifier)
-                .build()
-        var nr = NetworkRequest(caps, TYPE_NONE, 42 /* rId */, NetworkRequest.Type.RESERVATION)
-        doTestBlanketOfferIgnoresRequest(nr)
-
-        specifier = L2capNetworkSpecifier.Builder()
-                .setRole(ROLE_SERVER)
-                .build()
-        caps = NetworkCapabilities.Builder.withoutDefaultCapabilities()
-                .addTransportType(TRANSPORT_BLUETOOTH)
-                .setNetworkSpecifier(specifier)
-                .build()
-        nr = NetworkRequest(caps, TYPE_NONE, 44 /* rId */, NetworkRequest.Type.RESERVATION)
-        doTestBlanketOfferIgnoresRequest(nr)
-
-        specifier = L2capNetworkSpecifier.Builder()
-                .setRole(ROLE_SERVER)
-                .setHeaderCompression(HEADER_COMPRESSION_NONE)
-                .setPsm(0x81)
-                .build()
-        caps = NetworkCapabilities.Builder.withoutDefaultCapabilities()
-                .addTransportType(TRANSPORT_BLUETOOTH)
-                .setNetworkSpecifier(specifier)
-                .build()
-        nr = NetworkRequest(caps, TYPE_NONE, 45 /* rId */, NetworkRequest.Type.RESERVATION)
-        doTestBlanketOfferIgnoresRequest(nr)
-
-        specifier = L2capNetworkSpecifier.Builder()
-                .setHeaderCompression(HEADER_COMPRESSION_NONE)
-                .build()
-        caps = NetworkCapabilities.Builder.withoutDefaultCapabilities()
-                .addTransportType(TRANSPORT_BLUETOOTH)
-                .setNetworkSpecifier(specifier)
-                .build()
-        nr = NetworkRequest(caps, TYPE_NONE, 47 /* rId */, NetworkRequest.Type.RESERVATION)
-        doTestBlanketOfferIgnoresRequest(nr)
-    }
-}
diff --git a/tests/unit/java/com/android/server/connectivity/NetworkPermissionsTest.kt b/tests/unit/java/com/android/server/connectivity/NetworkPermissionsTest.kt
new file mode 100644
index 0000000..8a9d288
--- /dev/null
+++ b/tests/unit/java/com/android/server/connectivity/NetworkPermissionsTest.kt
@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2025 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.server.connectivity
+
+import android.net.INetd
+import android.os.Build
+import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo
+import com.android.testutils.DevSdkIgnoreRunner
+import kotlin.test.assertEquals
+import kotlin.test.assertFalse
+import org.junit.Test
+import org.junit.runner.RunWith
+
+@RunWith(DevSdkIgnoreRunner::class)
+@IgnoreUpTo(Build.VERSION_CODES.TIRAMISU)
+class NetworkPermissionsTest {
+    @Test
+    fun test_networkTrafficPerms_correctValues() {
+        assertEquals(NetworkPermissions.PERMISSION_NONE, INetd.PERMISSION_NONE) /* 0 */
+        assertEquals(NetworkPermissions.PERMISSION_NETWORK, INetd.PERMISSION_NETWORK) /* 1 */
+        assertEquals(NetworkPermissions.PERMISSION_SYSTEM, INetd.PERMISSION_SYSTEM) /* 2 */
+        assertEquals(NetworkPermissions.TRAFFIC_PERMISSION_INTERNET, 4)
+        assertEquals(NetworkPermissions.TRAFFIC_PERMISSION_UPDATE_DEVICE_STATS, 8)
+        assertEquals(NetworkPermissions.TRAFFIC_PERMISSION_UNINSTALLED, -1)
+        assertEquals(NetworkPermissions.TRAFFIC_PERMISSION_SDKSANDBOX_LOCALHOST, 16)
+    }
+
+    @Test
+    fun test_noOverridesInFlags() {
+        val permsList = listOf(
+            NetworkPermissions.PERMISSION_NONE,
+            NetworkPermissions.PERMISSION_NETWORK,
+            NetworkPermissions.PERMISSION_SYSTEM,
+            NetworkPermissions.TRAFFIC_PERMISSION_INTERNET,
+            NetworkPermissions.TRAFFIC_PERMISSION_UPDATE_DEVICE_STATS,
+            NetworkPermissions.TRAFFIC_PERMISSION_SDKSANDBOX_LOCALHOST,
+            NetworkPermissions.TRAFFIC_PERMISSION_UNINSTALLED
+        )
+        assertFalse(hasDuplicates(permsList))
+    }
+
+    fun hasDuplicates(list: List<Int>): Boolean {
+        return list.distinct().size != list.size
+    }
+}
diff --git a/tests/unit/java/com/android/server/connectivity/PermissionMonitorTest.java b/tests/unit/java/com/android/server/connectivity/PermissionMonitorTest.java
index 55c68b7..ec9c6b0 100644
--- a/tests/unit/java/com/android/server/connectivity/PermissionMonitorTest.java
+++ b/tests/unit/java/com/android/server/connectivity/PermissionMonitorTest.java
@@ -21,6 +21,7 @@
 import static android.Manifest.permission.CONNECTIVITY_INTERNAL;
 import static android.Manifest.permission.CONNECTIVITY_USE_RESTRICTED_NETWORKS;
 import static android.Manifest.permission.INTERNET;
+import static android.Manifest.permission.NEARBY_WIFI_DEVICES;
 import static android.Manifest.permission.NETWORK_STACK;
 import static android.Manifest.permission.OBSERVE_GRANT_REVOKE_PERMISSIONS;
 import static android.Manifest.permission.UPDATE_DEVICE_STATS;
@@ -31,6 +32,7 @@
 import static android.content.pm.PackageInfo.REQUESTED_PERMISSION_REQUIRED;
 import static android.content.pm.PackageManager.GET_PERMISSIONS;
 import static android.content.pm.PackageManager.MATCH_ANY_USER;
+import static android.content.pm.PackageManager.PERMISSION_DENIED;
 import static android.net.ConnectivitySettingsManager.UIDS_ALLOWED_ON_RESTRICTED_NETWORKS;
 import static android.net.INetd.PERMISSION_INTERNET;
 import static android.net.INetd.PERMISSION_NETWORK;
@@ -39,16 +41,20 @@
 import static android.net.INetd.PERMISSION_UNINSTALLED;
 import static android.net.INetd.PERMISSION_UPDATE_DEVICE_STATS;
 import static android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK;
+import static android.net.connectivity.ConnectivityCompatChanges.RESTRICT_LOCAL_NETWORK;
 import static android.os.Process.SYSTEM_UID;
+import static android.permission.PermissionManager.PERMISSION_GRANTED;
 
 import static com.android.server.connectivity.PermissionMonitor.isHigherNetworkPermission;
 import static com.android.testutils.TestPermissionUtil.runAsShell;
+import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo;
 
 import static junit.framework.Assert.fail;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
+import static org.junit.Assume.assumeTrue;
 import static org.mockito.AdditionalMatchers.aryEq;
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.ArgumentMatchers.anyBoolean;
@@ -68,6 +74,8 @@
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
+import android.compat.testing.PlatformCompatChangeRule;
+import android.content.AttributionSource;
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
@@ -85,7 +93,9 @@
 import android.os.SystemConfigManager;
 import android.os.UserHandle;
 import android.os.UserManager;
+import android.permission.PermissionManager;
 import android.provider.Settings;
+import android.util.ArraySet;
 import android.util.SparseIntArray;
 
 import androidx.annotation.NonNull;
@@ -102,9 +112,13 @@
 import com.android.testutils.DevSdkIgnoreRunner;
 import com.android.testutils.HandlerUtils;
 
+import libcore.junit.util.compat.CoreCompatChangeRule.EnableCompatChanges;
+
 import org.junit.After;
 import org.junit.Before;
+import org.junit.Rule;
 import org.junit.Test;
+import org.junit.rules.TestRule;
 import org.junit.runner.RunWith;
 import org.mockito.AdditionalAnswers;
 import org.mockito.ArgumentCaptor;
@@ -121,6 +135,8 @@
 @SmallTest
 @DevSdkIgnoreRule.IgnoreUpTo(Build.VERSION_CODES.R)
 public class PermissionMonitorTest {
+    @Rule
+    public TestRule compatChangeRule = new PlatformCompatChangeRule();
     private static final int MOCK_USER_ID1 = 0;
     private static final int MOCK_USER_ID2 = 1;
     private static final int MOCK_USER_ID3 = 2;
@@ -162,9 +178,14 @@
     private static final int PERMISSION_TRAFFIC_ALL =
             PERMISSION_INTERNET | PERMISSION_UPDATE_DEVICE_STATS;
     private static final int TIMEOUT_MS = 2_000;
+    // The ACCESS_LOCAL_NETWORK permission is not available yet. For the time being, use
+    // NEARBY_WIFI_DEVICES as a means to develop, for expediency.
+    // TODO(b/375236298): remove this constant when the ACCESS_LOCAL_NETWORK permission is defined.
+    private static final String ACCESS_LOCAL_NETWORK = NEARBY_WIFI_DEVICES;
 
     @Mock private Context mContext;
     @Mock private PackageManager mPackageManager;
+    @Mock private PermissionManager mPermissionManager;
     @Mock private INetd mNetdService;
     @Mock private UserManager mUserManager;
     @Mock private PermissionMonitor.Dependencies mDeps;
@@ -183,6 +204,7 @@
         when(mContext.getPackageManager()).thenReturn(mPackageManager);
         when(mContext.getSystemService(eq(Context.USER_SERVICE))).thenReturn(mUserManager);
         doReturn(List.of(MOCK_USER1)).when(mUserManager).getUserHandles(eq(true));
+        when(mContext.getSystemService(PermissionManager.class)).thenReturn(mPermissionManager);
         when(mContext.getSystemServiceName(SystemConfigManager.class))
                 .thenReturn(Context.SYSTEM_CONFIG_SERVICE);
         when(mContext.getSystemService(Context.SYSTEM_CONFIG_SERVICE))
@@ -295,19 +317,28 @@
         return result;
     }
 
-    private void buildAndMockPackageInfoWithPermissions(String packageName, int uid,
+    private PackageInfo buildAndMockPackageInfoWithPermissions(String packageName, int uid,
             String... permissions) throws Exception {
         final PackageInfo packageInfo = buildPackageInfo(packageName, uid, permissions);
         // This will return the wrong UID for the package when queried with other users.
         doReturn(packageInfo).when(mPackageManager)
                 .getPackageInfo(eq(packageName), anyInt() /* flag */);
+        if (BpfNetMaps.isAtLeast25Q2()) {
+            // Runtime permission checks for local net restrictions were introduced in 25Q2
+            for (String permission : permissions) {
+                doReturn(PERMISSION_GRANTED).when(mPermissionManager).checkPermissionForPreflight(
+                        eq(permission),
+                        argThat(attributionSource -> attributionSource.getUid() == uid));
+            }
+        }
         final String[] oldPackages = mPackageManager.getPackagesForUid(uid);
         // If it's duplicated package, no need to set it again.
-        if (CollectionUtils.contains(oldPackages, packageName)) return;
+        if (CollectionUtils.contains(oldPackages, packageName)) return packageInfo;
 
         // Combine the package if this uid is shared with other packages.
         final String[] newPackages = appendElement(String.class, oldPackages, packageName);
         doReturn(newPackages).when(mPackageManager).getPackagesForUid(eq(uid));
+        return packageInfo;
     }
 
     private void startMonitoring() {
@@ -342,7 +373,7 @@
 
     private void addPackage(String packageName, int uid, String... permissions) throws Exception {
         buildAndMockPackageInfoWithPermissions(packageName, uid, permissions);
-        processOnHandlerThread(() -> mPermissionMonitor.onPackageAdded(packageName, uid));
+        onPackageAdded(packageName, uid);
     }
 
     private void removePackage(String packageName, int uid) {
@@ -354,7 +385,12 @@
         final String[] newPackages = Arrays.stream(oldPackages).filter(e -> !e.equals(packageName))
                 .toArray(String[]::new);
         doReturn(newPackages).when(mPackageManager).getPackagesForUid(eq(uid));
-        processOnHandlerThread(() -> mPermissionMonitor.onPackageRemoved(packageName, uid));
+        if (BpfNetMaps.isAtLeast25Q2()){
+            // Runtime permission checks for local net restrictions were introduced in 25Q2
+            doReturn(PERMISSION_DENIED).when(mPermissionManager).checkPermissionForPreflight(
+                    anyString(), argThat(as -> as.getUid() == uid));
+        }
+        onPackageRemoved(packageName, uid);
     }
 
     @Test
@@ -585,6 +621,7 @@
     }
 
     @Test
+    @EnableCompatChanges(RESTRICT_LOCAL_NETWORK)
     public void testHasUseBackgroundNetworksPermission() throws Exception {
         assertFalse(mPermissionMonitor.hasUseBackgroundNetworksPermission(SYSTEM_UID));
         assertBackgroundPermission(false, SYSTEM_PACKAGE1, SYSTEM_UID);
@@ -606,6 +643,7 @@
 
     private class BpfMapMonitor {
         private final SparseIntArray mAppIdsTrafficPermission = new SparseIntArray();
+        private final ArraySet<Integer> mLocalNetBlockedUids = new ArraySet<>();
         private static final int DOES_NOT_EXIST = -2;
 
         BpfMapMonitor(BpfNetMaps mockBpfmap) throws Exception {
@@ -618,6 +656,18 @@
                 }
                 return null;
             }).when(mockBpfmap).setNetPermForUids(anyInt(), any(int[].class));
+            doAnswer((InvocationOnMock invocation) -> {
+                final Object[] args = invocation.getArguments();
+                final int uid = (int) args[0];
+                mLocalNetBlockedUids.add(uid);
+                return null;
+            }).when(mockBpfmap).addUidToLocalNetBlockMap(anyInt());
+            doAnswer((InvocationOnMock invocation) -> {
+                final Object[] args = invocation.getArguments();
+                final int uid = (int) args[0];
+                mLocalNetBlockedUids.remove(uid);
+                return null;
+            }).when(mockBpfmap).removeUidFromLocalNetBlockMap(anyInt());
         }
 
         public void expectTrafficPerm(int permission, Integer... appIds) {
@@ -642,6 +692,18 @@
                 }
             }
         }
+
+        public boolean hasLocalNetPermissions(int uid) {
+            return !mLocalNetBlockedUids.contains(uid);
+        }
+
+        public boolean isUidPresentInLocalNetBlockMap(int uid) {
+            return mLocalNetBlockedUids.contains(uid);
+        }
+
+        public boolean hasBlockedLocalNetForSandboxUid(int sandboxUid) {
+            return mLocalNetBlockedUids.contains(sandboxUid);
+        }
     }
 
     private class NetdMonitor {
@@ -725,6 +787,7 @@
     }
 
     @Test
+    @EnableCompatChanges(RESTRICT_LOCAL_NETWORK)
     public void testUserAndPackageAddRemove() throws Exception {
         // MOCK_UID11: MOCK_PACKAGE1 only has network permission.
         // SYSTEM_APP_UID11: SYSTEM_PACKAGE1 has system permission.
@@ -814,6 +877,48 @@
                 MOCK_APPID1);
     }
 
+    @IgnoreUpTo(Build.VERSION_CODES.VANILLA_ICE_CREAM)
+    @Test
+    @EnableCompatChanges(RESTRICT_LOCAL_NETWORK)
+    public void testLocalNetRestrictions_onUserAdded() throws Exception {
+        assumeTrue(BpfNetMaps.isAtLeast25Q2());
+        doReturn(true).when(mDeps).shouldEnforceLocalNetRestrictions(anyInt());
+        when(mPermissionManager.checkPermissionForPreflight(
+                anyString(), any(AttributionSource.class))).thenReturn(PERMISSION_DENIED);
+        final PackageInfo packageInfo = buildAndMockPackageInfoWithPermissions(
+                MOCK_PACKAGE1, MOCK_UID11, CHANGE_NETWORK_STATE);
+        // Set package for all users on devices
+        doReturn(List.of(packageInfo)).when(mPackageManager)
+                .getInstalledPackagesAsUser(anyInt(), eq(MOCK_USER1.getIdentifier()));
+        onUserAdded(MOCK_USER1);
+
+        assertFalse(mBpfMapMonitor.hasLocalNetPermissions(MOCK_UID11));
+        if (hasSdkSandbox(MOCK_UID11)) {
+            assertTrue(mBpfMapMonitor.hasBlockedLocalNetForSandboxUid(
+                    mProcessShim.toSdkSandboxUid(MOCK_UID11)));
+        }
+    }
+
+    @IgnoreUpTo(Build.VERSION_CODES.VANILLA_ICE_CREAM)
+    @Test
+    @EnableCompatChanges(RESTRICT_LOCAL_NETWORK)
+    public void testLocalNetRestrictions_onUserRemoved() throws Exception {
+        assumeTrue(BpfNetMaps.isAtLeast25Q2());
+        doReturn(true).when(mDeps).shouldEnforceLocalNetRestrictions(anyInt());
+        when(mPermissionManager.checkPermissionForPreflight(
+                anyString(), any(AttributionSource.class))).thenReturn(PERMISSION_DENIED);
+        final PackageInfo packageInfo = buildAndMockPackageInfoWithPermissions(
+                MOCK_PACKAGE1, MOCK_UID11, CHANGE_NETWORK_STATE);
+        // Set package for all users on devices
+        doReturn(List.of(packageInfo)).when(mPackageManager)
+                .getInstalledPackagesAsUser(anyInt(), eq(MOCK_USER1.getIdentifier()));
+        onUserAdded(MOCK_USER1);
+        assertFalse(mBpfMapMonitor.hasLocalNetPermissions(MOCK_UID11));
+
+        onUserRemoved(MOCK_USER1);
+        assertFalse(mBpfMapMonitor.isUidPresentInLocalNetBlockMap(MOCK_UID11));
+    }
+
     private void doTestUidFilteringDuringVpnConnectDisconnectAndUidUpdates(@Nullable String ifName)
             throws Exception {
         doReturn(List.of(
@@ -860,11 +965,13 @@
     }
 
     @Test
+    @EnableCompatChanges(RESTRICT_LOCAL_NETWORK)
     public void testUidFilteringDuringVpnConnectDisconnectAndUidUpdates() throws Exception {
         doTestUidFilteringDuringVpnConnectDisconnectAndUidUpdates("tun0");
     }
 
     @Test
+    @EnableCompatChanges(RESTRICT_LOCAL_NETWORK)
     public void testUidFilteringDuringVpnConnectDisconnectAndUidUpdatesWithWildcard()
             throws Exception {
         doTestUidFilteringDuringVpnConnectDisconnectAndUidUpdates(null /* ifName */);
@@ -897,16 +1004,19 @@
     }
 
     @Test
+    @EnableCompatChanges(RESTRICT_LOCAL_NETWORK)
     public void testUidFilteringDuringPackageInstallAndUninstall() throws Exception {
         doTestUidFilteringDuringPackageInstallAndUninstall("tun0");
     }
 
     @Test
+    @EnableCompatChanges(RESTRICT_LOCAL_NETWORK)
     public void testUidFilteringDuringPackageInstallAndUninstallWithWildcard() throws Exception {
         doTestUidFilteringDuringPackageInstallAndUninstall(null /* ifName */);
     }
 
     @Test
+    @EnableCompatChanges(RESTRICT_LOCAL_NETWORK)
     public void testLockdownUidFilteringWithLockdownEnableDisable() {
         doReturn(List.of(
                 buildPackageInfo(SYSTEM_PACKAGE1, SYSTEM_APP_UID11, CHANGE_NETWORK_STATE,
@@ -938,6 +1048,7 @@
     }
 
     @Test
+    @EnableCompatChanges(RESTRICT_LOCAL_NETWORK)
     public void testLockdownUidFilteringWithLockdownEnableDisableWithMultiAdd() {
         doReturn(List.of(
                 buildPackageInfo(SYSTEM_PACKAGE1, SYSTEM_APP_UID11, CHANGE_NETWORK_STATE,
@@ -979,6 +1090,7 @@
     }
 
     @Test
+    @EnableCompatChanges(RESTRICT_LOCAL_NETWORK)
     public void testLockdownUidFilteringWithLockdownEnableDisableWithMultiAddAndOverlap() {
         doReturn(List.of(buildPackageInfo(SYSTEM_PACKAGE1, SYSTEM_APP_UID11, CHANGE_NETWORK_STATE,
                         CONNECTIVITY_USE_RESTRICTED_NETWORKS),
@@ -1039,6 +1151,7 @@
     }
 
     @Test
+    @EnableCompatChanges(RESTRICT_LOCAL_NETWORK)
     public void testLockdownUidFilteringWithLockdownEnableDisableWithDuplicates() {
         doReturn(List.of(
                 buildPackageInfo(SYSTEM_PACKAGE1, SYSTEM_APP_UID11, CHANGE_NETWORK_STATE,
@@ -1073,6 +1186,7 @@
     }
 
     @Test
+    @EnableCompatChanges(RESTRICT_LOCAL_NETWORK)
     public void testLockdownUidFilteringWithInstallAndUnInstall() {
         doReturn(List.of(
                 buildPackageInfo(SYSTEM_PACKAGE1, SYSTEM_APP_UID11, CHANGE_NETWORK_STATE,
@@ -1109,15 +1223,13 @@
     // called multiple times with the uid corresponding to each user.
     private void addPackageForUsers(UserHandle[] users, String packageName, int appId) {
         for (final UserHandle user : users) {
-            processOnHandlerThread(() ->
-                    mPermissionMonitor.onPackageAdded(packageName, user.getUid(appId)));
+            onPackageAdded(packageName, user.getUid(appId));
         }
     }
 
     private void removePackageForUsers(UserHandle[] users, String packageName, int appId) {
         for (final UserHandle user : users) {
-            processOnHandlerThread(() ->
-                    mPermissionMonitor.onPackageRemoved(packageName, user.getUid(appId)));
+            onPackageRemoved(packageName, user.getUid(appId));
         }
     }
 
@@ -1165,6 +1277,7 @@
     }
 
     @Test
+    @EnableCompatChanges(RESTRICT_LOCAL_NETWORK)
     public void testPackageInstall() throws Exception {
         addPackage(MOCK_PACKAGE1, MOCK_UID11, INTERNET, UPDATE_DEVICE_STATS);
         mBpfMapMonitor.expectTrafficPerm(PERMISSION_TRAFFIC_ALL, MOCK_APPID1);
@@ -1173,7 +1286,25 @@
         mBpfMapMonitor.expectTrafficPerm(PERMISSION_INTERNET, MOCK_APPID2);
     }
 
+    @IgnoreUpTo(Build.VERSION_CODES.VANILLA_ICE_CREAM)
     @Test
+    @EnableCompatChanges(RESTRICT_LOCAL_NETWORK)
+    public void testLocalNetRestrictions_onPackageInstall() throws Exception {
+        assumeTrue(BpfNetMaps.isAtLeast25Q2());
+        doReturn(true).when(mDeps).shouldEnforceLocalNetRestrictions(anyInt());
+        when(mPermissionManager.checkPermissionForPreflight(
+                anyString(), any(AttributionSource.class))).thenReturn(PERMISSION_DENIED);
+        addPackage(MOCK_PACKAGE1, MOCK_UID11, INTERNET);
+        assertFalse(mBpfMapMonitor.hasLocalNetPermissions(MOCK_UID11));
+
+        addPackage(MOCK_PACKAGE2, MOCK_UID12, ACCESS_LOCAL_NETWORK);
+        assertTrue(mBpfMapMonitor.hasLocalNetPermissions(MOCK_UID12));
+        if (hasSdkSandbox(MOCK_UID12)) assertTrue(mBpfMapMonitor.hasBlockedLocalNetForSandboxUid(
+                mProcessShim.toSdkSandboxUid(MOCK_UID12)));
+    }
+
+    @Test
+    @EnableCompatChanges(RESTRICT_LOCAL_NETWORK)
     public void testPackageInstallSharedUid() throws Exception {
         addPackage(MOCK_PACKAGE1, MOCK_UID11, INTERNET, UPDATE_DEVICE_STATS);
         mBpfMapMonitor.expectTrafficPerm(PERMISSION_TRAFFIC_ALL, MOCK_APPID1);
@@ -1185,6 +1316,7 @@
     }
 
     @Test
+    @EnableCompatChanges(RESTRICT_LOCAL_NETWORK)
     public void testPackageUninstallBasic() throws Exception {
         addPackage(MOCK_PACKAGE1, MOCK_UID11, INTERNET, UPDATE_DEVICE_STATS);
         mBpfMapMonitor.expectTrafficPerm(PERMISSION_TRAFFIC_ALL, MOCK_APPID1);
@@ -1194,7 +1326,24 @@
         mBpfMapMonitor.expectTrafficPerm(PERMISSION_UNINSTALLED, MOCK_APPID1);
     }
 
+    @IgnoreUpTo(Build.VERSION_CODES.VANILLA_ICE_CREAM)
     @Test
+    @EnableCompatChanges(RESTRICT_LOCAL_NETWORK)
+    public void testLocalNetRestrictions_onPackageUninstall() throws Exception {
+        assumeTrue(BpfNetMaps.isAtLeast25Q2());
+        doReturn(true).when(mDeps).shouldEnforceLocalNetRestrictions(anyInt());
+        when(mPermissionManager.checkPermissionForPreflight(
+                anyString(), any(AttributionSource.class))).thenReturn(PERMISSION_DENIED);
+        addPackage(MOCK_PACKAGE1, MOCK_UID11, ACCESS_LOCAL_NETWORK);
+        assertTrue(mBpfMapMonitor.hasLocalNetPermissions(MOCK_UID11));
+
+        when(mPackageManager.getPackagesForUid(MOCK_UID11)).thenReturn(new String[]{});
+        onPackageRemoved(MOCK_PACKAGE1, MOCK_UID11);
+        assertFalse(mBpfMapMonitor.isUidPresentInLocalNetBlockMap(MOCK_UID11));
+    }
+
+    @Test
+    @EnableCompatChanges(RESTRICT_LOCAL_NETWORK)
     public void testPackageRemoveThenAdd() throws Exception {
         addPackage(MOCK_PACKAGE1, MOCK_UID11, INTERNET, UPDATE_DEVICE_STATS);
         mBpfMapMonitor.expectTrafficPerm(PERMISSION_TRAFFIC_ALL, MOCK_APPID1);
@@ -1207,7 +1356,30 @@
         mBpfMapMonitor.expectTrafficPerm(PERMISSION_INTERNET, MOCK_APPID1);
     }
 
+    @IgnoreUpTo(Build.VERSION_CODES.VANILLA_ICE_CREAM)
     @Test
+    @EnableCompatChanges(RESTRICT_LOCAL_NETWORK)
+    public void testLocalNetRestrictions_onPackageRemoveThenAdd() throws Exception {
+        assumeTrue(BpfNetMaps.isAtLeast25Q2());
+        doReturn(true).when(mDeps).shouldEnforceLocalNetRestrictions(anyInt());
+        when(mPermissionManager.checkPermissionForPreflight(
+                anyString(), any(AttributionSource.class))).thenReturn(PERMISSION_DENIED);
+        addPackage(MOCK_PACKAGE1, MOCK_UID11, ACCESS_LOCAL_NETWORK);
+        assertTrue(mBpfMapMonitor.hasLocalNetPermissions(MOCK_UID11));
+        if (hasSdkSandbox(MOCK_UID12)) assertTrue(mBpfMapMonitor.hasBlockedLocalNetForSandboxUid(
+                mProcessShim.toSdkSandboxUid(MOCK_UID11)));
+
+        removePackage(MOCK_PACKAGE1, MOCK_UID11);
+        assertFalse(mBpfMapMonitor.isUidPresentInLocalNetBlockMap(MOCK_UID11));
+
+        addPackage(MOCK_PACKAGE1, MOCK_UID11, INTERNET);
+        assertFalse(mBpfMapMonitor.hasLocalNetPermissions(MOCK_UID11));
+        if (hasSdkSandbox(MOCK_UID12)) assertTrue(mBpfMapMonitor.hasBlockedLocalNetForSandboxUid(
+                mProcessShim.toSdkSandboxUid(MOCK_UID11)));
+    }
+
+    @Test
+    @EnableCompatChanges(RESTRICT_LOCAL_NETWORK)
     public void testPackageUpdate() throws Exception {
         addPackage(MOCK_PACKAGE1, MOCK_UID11);
         mBpfMapMonitor.expectTrafficPerm(PERMISSION_NONE, MOCK_APPID1);
@@ -1217,6 +1389,7 @@
     }
 
     @Test
+    @EnableCompatChanges(RESTRICT_LOCAL_NETWORK)
     public void testPackageUninstallWithMultiplePackages() throws Exception {
         addPackage(MOCK_PACKAGE1, MOCK_UID11, INTERNET, UPDATE_DEVICE_STATS);
         mBpfMapMonitor.expectTrafficPerm(PERMISSION_TRAFFIC_ALL, MOCK_APPID1);
@@ -1248,6 +1421,7 @@
     }
 
     @Test
+    @EnableCompatChanges(RESTRICT_LOCAL_NETWORK)
     public void testUpdateUidPermissionsFromSystemConfig() throws Exception {
         when(mSystemConfigManager.getSystemPermissionUids(eq(INTERNET)))
                 .thenReturn(new int[]{ MOCK_UID11, MOCK_UID12 });
@@ -1287,6 +1461,7 @@
     }
 
     @Test
+    @EnableCompatChanges(RESTRICT_LOCAL_NETWORK)
     public void testIntentReceiver() throws Exception {
         startMonitoring();
         final BroadcastReceiver receiver = expectBroadcastReceiver(
@@ -1325,6 +1500,7 @@
     }
 
     @Test
+    @EnableCompatChanges(RESTRICT_LOCAL_NETWORK)
     public void testUidsAllowedOnRestrictedNetworksChanged() throws Exception {
         startMonitoring();
         final ContentObserver contentObserver = expectRegisterContentObserver(
@@ -1357,6 +1533,7 @@
     }
 
     @Test
+    @EnableCompatChanges(RESTRICT_LOCAL_NETWORK)
     public void testUidsAllowedOnRestrictedNetworksChangedWithSharedUid() throws Exception {
         startMonitoring();
         final ContentObserver contentObserver = expectRegisterContentObserver(
@@ -1390,6 +1567,7 @@
     }
 
     @Test
+    @EnableCompatChanges(RESTRICT_LOCAL_NETWORK)
     public void testUidsAllowedOnRestrictedNetworksChangedWithMultipleUsers() throws Exception {
         startMonitoring();
         final ContentObserver contentObserver = expectRegisterContentObserver(
@@ -1444,6 +1622,7 @@
     }
 
     @Test
+    @EnableCompatChanges(RESTRICT_LOCAL_NETWORK)
     public void testOnExternalApplicationsAvailable() throws Exception {
         // Initial the permission state. MOCK_PACKAGE1 and MOCK_PACKAGE2 are installed on external
         // and have different uids. There has no permission for both uids.
@@ -1475,6 +1654,7 @@
     }
 
     @Test
+    @EnableCompatChanges(RESTRICT_LOCAL_NETWORK)
     public void testOnExternalApplicationsAvailable_AppsNotRegisteredOnStartMonitoring()
             throws Exception {
         startMonitoring();
@@ -1502,6 +1682,7 @@
     }
 
     @Test
+    @EnableCompatChanges(RESTRICT_LOCAL_NETWORK)
     public void testOnExternalApplicationsAvailableWithSharedUid()
             throws Exception {
         // Initial the permission state. MOCK_PACKAGE1 and MOCK_PACKAGE2 are installed on external
@@ -1528,6 +1709,7 @@
     }
 
     @Test
+    @EnableCompatChanges(RESTRICT_LOCAL_NETWORK)
     public void testOnExternalApplicationsAvailableWithSharedUid_DifferentStorage()
             throws Exception {
         // Initial the permission state. MOCK_PACKAGE1 is installed on external storage and
@@ -1570,6 +1752,38 @@
         assertFalse(isHigherNetworkPermission(PERMISSION_SYSTEM, PERMISSION_SYSTEM));
     }
 
+    @IgnoreUpTo(Build.VERSION_CODES.VANILLA_ICE_CREAM)
+    @Test
+    @EnableCompatChanges(RESTRICT_LOCAL_NETWORK)
+    public void testLocalNetRestrictions_setPermChanges() throws Exception {
+        assumeTrue(BpfNetMaps.isAtLeast25Q2());
+        doReturn(true).when(mDeps).shouldEnforceLocalNetRestrictions(anyInt());
+        when(mPermissionManager.checkPermissionForPreflight(
+                anyString(), any(AttributionSource.class))).thenReturn(PERMISSION_DENIED);
+        addPackage(MOCK_PACKAGE1, MOCK_UID11, INTERNET);
+        assertFalse(mBpfMapMonitor.hasLocalNetPermissions(MOCK_UID11));
+
+        // Mock permission grant
+        when(mPermissionManager.checkPermissionForPreflight(
+                eq(ACCESS_LOCAL_NETWORK),
+                argThat(attributionSource -> attributionSource.getUid() == MOCK_UID11)))
+                .thenReturn(PERMISSION_GRANTED);
+        mPermissionMonitor.setLocalNetworkPermissions(MOCK_UID11, null);
+        assertTrue(mBpfMapMonitor.hasLocalNetPermissions(MOCK_UID11));
+        if (hasSdkSandbox(MOCK_UID12)) assertTrue(mBpfMapMonitor.hasBlockedLocalNetForSandboxUid(
+                mProcessShim.toSdkSandboxUid(MOCK_UID11)));
+
+        // Mock permission denied
+        when(mPermissionManager.checkPermissionForPreflight(
+                eq(ACCESS_LOCAL_NETWORK),
+                argThat(attributionSource -> attributionSource.getUid() == MOCK_UID11)))
+                .thenReturn(PERMISSION_DENIED);
+        mPermissionMonitor.setLocalNetworkPermissions(MOCK_UID11, null);
+        assertFalse(mBpfMapMonitor.hasLocalNetPermissions(MOCK_UID11));
+        if (hasSdkSandbox(MOCK_UID12)) assertTrue(mBpfMapMonitor.hasBlockedLocalNetForSandboxUid(
+                mProcessShim.toSdkSandboxUid(MOCK_UID11)));
+    }
+
     private void prepareMultiUserPackages() {
         // MOCK_USER1 has installed 3 packages
         // mockApp1 has no permission and share MOCK_APPID1.
@@ -1602,7 +1816,7 @@
 
     private void addUserAndVerifyAppIdsPermissions(UserHandle user, int appId1Perm,
             int appId2Perm, int appId3Perm) {
-        processOnHandlerThread(() -> mPermissionMonitor.onUserAdded(user));
+        onUserAdded(user);
         mBpfMapMonitor.expectTrafficPerm(appId1Perm, MOCK_APPID1);
         mBpfMapMonitor.expectTrafficPerm(appId2Perm, MOCK_APPID2);
         mBpfMapMonitor.expectTrafficPerm(appId3Perm, MOCK_APPID3);
@@ -1610,13 +1824,14 @@
 
     private void removeUserAndVerifyAppIdsPermissions(UserHandle user, int appId1Perm,
             int appId2Perm, int appId3Perm) {
-        processOnHandlerThread(() -> mPermissionMonitor.onUserRemoved(user));
+        onUserRemoved(user);
         mBpfMapMonitor.expectTrafficPerm(appId1Perm, MOCK_APPID1);
         mBpfMapMonitor.expectTrafficPerm(appId2Perm, MOCK_APPID2);
         mBpfMapMonitor.expectTrafficPerm(appId3Perm, MOCK_APPID3);
     }
 
     @Test
+    @EnableCompatChanges(RESTRICT_LOCAL_NETWORK)
     public void testAppIdsTrafficPermission_UserAddedRemoved() {
         prepareMultiUserPackages();
 
@@ -1650,6 +1865,7 @@
     }
 
     @Test
+    @EnableCompatChanges(RESTRICT_LOCAL_NETWORK)
     public void testAppIdsTrafficPermission_Multiuser_PackageAdded() throws Exception {
         // Add two users with empty package list.
         onUserAdded(MOCK_USER1);
@@ -1720,6 +1936,7 @@
     }
 
     @Test
+    @EnableCompatChanges(RESTRICT_LOCAL_NETWORK)
     public void testAppIdsTrafficPermission_Multiuser_PackageRemoved() throws Exception {
         // Add two users with empty package list.
         onUserAdded(MOCK_USER1);
diff --git a/tests/unit/java/com/android/server/connectivity/mdns/DiscoveryExecutorTest.kt b/tests/unit/java/com/android/server/connectivity/mdns/DiscoveryExecutorTest.kt
new file mode 100644
index 0000000..51539a0
--- /dev/null
+++ b/tests/unit/java/com/android/server/connectivity/mdns/DiscoveryExecutorTest.kt
@@ -0,0 +1,110 @@
+/*
+ * Copyright (C) 2024 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.server.connectivity.mdns
+
+import android.os.Build
+import android.os.HandlerThread
+import android.testing.TestableLooper
+import com.android.testutils.DevSdkIgnoreRule
+import com.android.testutils.DevSdkIgnoreRunner
+import java.util.concurrent.CompletableFuture
+import java.util.concurrent.TimeUnit
+import org.junit.After
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertTrue
+import org.junit.Test
+import org.junit.runner.RunWith
+
+private const val DEFAULT_TIMEOUT = 2000L
+
+@DevSdkIgnoreRunner.MonitorThreadLeak
+@RunWith(DevSdkIgnoreRunner::class)
+@DevSdkIgnoreRule.IgnoreUpTo(Build.VERSION_CODES.S_V2)
+class DiscoveryExecutorTest {
+    private val thread = HandlerThread(DiscoveryExecutorTest::class.simpleName).apply { start() }
+
+    @After
+    fun tearDown() {
+        thread.quitSafely()
+        thread.join()
+    }
+
+    @Test
+    fun testCheckAndRunOnHandlerThread() {
+        val testableLooper = TestableLooper(thread.looper)
+        val executor = DiscoveryExecutor(testableLooper.looper)
+        try {
+            val future = CompletableFuture<Boolean>()
+            executor.checkAndRunOnHandlerThread { future.complete(true) }
+            testableLooper.processAllMessages()
+            assertTrue(future.get(DEFAULT_TIMEOUT, TimeUnit.MILLISECONDS))
+        } finally {
+            testableLooper.destroy()
+        }
+
+        // Create a DiscoveryExecutor with the null defaultLooper and verify the task can execute
+        // normally.
+        val executor2 = DiscoveryExecutor(null /* defaultLooper */)
+        val future2 = CompletableFuture<Boolean>()
+        executor2.checkAndRunOnHandlerThread { future2.complete(true) }
+        assertTrue(future2.get(DEFAULT_TIMEOUT, TimeUnit.MILLISECONDS))
+        executor2.shutDown()
+    }
+
+    @Test
+    fun testExecute() {
+        val testableLooper = TestableLooper(thread.looper)
+        val executor = DiscoveryExecutor(testableLooper.looper)
+        try {
+            val future = CompletableFuture<Boolean>()
+            executor.execute { future.complete(true) }
+            assertFalse(future.isDone)
+            testableLooper.processAllMessages()
+            assertTrue(future.get(DEFAULT_TIMEOUT, TimeUnit.MILLISECONDS))
+        } finally {
+            testableLooper.destroy()
+        }
+    }
+
+    @Test
+    fun testExecuteDelayed() {
+        val testableLooper = TestableLooper(thread.looper)
+        val executor = DiscoveryExecutor(testableLooper.looper)
+        try {
+            // Verify the executeDelayed method
+            val future = CompletableFuture<Boolean>()
+            // Schedule a task with 999 ms delay
+            executor.executeDelayed({ future.complete(true) }, 999L)
+            testableLooper.processAllMessages()
+            assertFalse(future.isDone)
+
+            // 500 ms have elapsed but do not exceed the target time (999 ms)
+            // The function should not be executed.
+            testableLooper.moveTimeForward(500L)
+            testableLooper.processAllMessages()
+            assertFalse(future.isDone)
+
+            // 500 ms have elapsed again and have exceeded the target time (999 ms).
+            // The function should be executed.
+            testableLooper.moveTimeForward(500L)
+            testableLooper.processAllMessages()
+            assertTrue(future.get(500L, TimeUnit.MILLISECONDS))
+        } finally {
+            testableLooper.destroy()
+        }
+    }
+}
diff --git a/tests/unit/java/com/android/server/connectivity/mdns/MdnsAdvertiserTest.kt b/tests/unit/java/com/android/server/connectivity/mdns/MdnsAdvertiserTest.kt
index ba62114..087617a 100644
--- a/tests/unit/java/com/android/server/connectivity/mdns/MdnsAdvertiserTest.kt
+++ b/tests/unit/java/com/android/server/connectivity/mdns/MdnsAdvertiserTest.kt
@@ -92,6 +92,20 @@
     network = TEST_NETWORK_1
 }
 
+private val GOOGLECAST_SERVICE = NsdServiceInfo("TestServiceName", "_googlecast._tcp").apply {
+    subtypes = setOf(TEST_SUBTYPE)
+    port = 12345
+    hostAddresses = listOf(TEST_ADDR)
+    network = TEST_NETWORK_1
+}
+
+private val GOOGLEZONE_SERVICE = NsdServiceInfo("TestServiceName", "_GOOglezone._tcp").apply {
+    subtypes = setOf(TEST_SUBTYPE)
+    port = 12345
+    hostAddresses = listOf(TEST_ADDR)
+    network = TEST_NETWORK_1
+}
+
 private val SERVICE_1_SUBTYPE = NsdServiceInfo("TestServiceName", "_advertisertest._tcp").apply {
     subtypes = setOf(TEST_SUBTYPE)
     port = 12345
@@ -143,6 +157,15 @@
     OffloadEngine.OFFLOAD_TYPE_REPLY.toLong()
 )
 
+private val OFFLOAD_SERVICE_INFO_GOOGLECAST = OffloadServiceInfo(
+    OffloadServiceInfo.Key("TestServiceName", "_googlecast._tcp"),
+    listOf(),
+    "Android_test.local",
+    TEST_OFFLOAD_PACKET1,
+    Int.MAX_VALUE,
+    OffloadEngine.OFFLOAD_TYPE_REPLY.toLong()
+)
+
 private val OFFLOAD_SERVICEINFO_NO_SUBTYPE = OffloadServiceInfo(
     OffloadServiceInfo.Key("TestServiceName", "_advertisertest._tcp"),
     listOf(),
@@ -167,6 +190,10 @@
     "5:_otherprioritytest._tcp"
 )
 
+private val SERVICES_DENY_LIST = arrayOf(
+    "_googlezone._tcp",
+)
+
 @RunWith(DevSdkIgnoreRunner::class)
 @IgnoreUpTo(Build.VERSION_CODES.S_V2)
 class MdnsAdvertiserTest {
@@ -189,11 +216,25 @@
     fun setUp() {
         thread.start()
         doReturn(TEST_HOSTNAME).`when`(mockDeps).generateHostname(anyBoolean())
-        doReturn(mockInterfaceAdvertiser1).`when`(mockDeps).makeAdvertiser(eq(mockSocket1),
-                any(), any(), any(), any(), any(), any(), any()
+        doReturn(mockInterfaceAdvertiser1).`when`(mockDeps).makeAdvertiser(
+            eq(mockSocket1),
+            any(),
+            any(),
+            any(),
+            any(),
+            any(),
+            any(),
+            any()
         )
-        doReturn(mockInterfaceAdvertiser2).`when`(mockDeps).makeAdvertiser(eq(mockSocket2),
-                any(), any(), any(), any(), any(), any(), any()
+        doReturn(mockInterfaceAdvertiser2).`when`(mockDeps).makeAdvertiser(
+            eq(mockSocket2),
+            any(),
+            any(),
+            any(),
+            any(),
+            any(),
+            any(),
+            any()
         )
         doReturn(true).`when`(mockInterfaceAdvertiser1).isProbing(anyInt())
         doReturn(true).`when`(mockInterfaceAdvertiser2).isProbing(anyInt())
@@ -202,16 +243,24 @@
         doReturn(TEST_INTERFACE1).`when`(mockInterfaceAdvertiser1).socketInterfaceName
         doReturn(TEST_INTERFACE2).`when`(mockInterfaceAdvertiser2).socketInterfaceName
         doReturn(TEST_OFFLOAD_PACKET1).`when`(mockInterfaceAdvertiser1).getRawOffloadPayload(
-            SERVICE_ID_1)
+            SERVICE_ID_1
+        )
         doReturn(TEST_OFFLOAD_PACKET1).`when`(mockInterfaceAdvertiser1).getRawOffloadPayload(
-            SERVICE_ID_2)
+            SERVICE_ID_2
+        )
         doReturn(TEST_OFFLOAD_PACKET1).`when`(mockInterfaceAdvertiser1).getRawOffloadPayload(
-            SERVICE_ID_3)
+            SERVICE_ID_3
+        )
         doReturn(TEST_OFFLOAD_PACKET1).`when`(mockInterfaceAdvertiser2).getRawOffloadPayload(
-            SERVICE_ID_1)
+            SERVICE_ID_1
+        )
         doReturn(resources).`when`(context).getResources()
         doReturn(SERVICES_PRIORITY_LIST).`when`(resources).getStringArray(
-            R.array.config_nsdOffloadServicesPriority)
+            R.array.config_nsdOffloadServicesPriority
+        )
+        doReturn(SERVICES_DENY_LIST).`when`(resources).getStringArray(
+            R.array.config_nsdOffloadServicesDenyList
+        )
         ConnectivityResources.setResourcesContextForTest(context)
     }
 
@@ -232,8 +281,12 @@
     fun testAddService_OneNetwork() {
         val advertiser =
             MdnsAdvertiser(thread.looper, socketProvider, cb, mockDeps, sharedlog, flags, context)
-        postSync { advertiser.addOrUpdateService(SERVICE_ID_1, SERVICE_1,
-                DEFAULT_ADVERTISING_OPTION, TEST_CLIENT_UID_1) }
+        postSync { advertiser.addOrUpdateService(
+            SERVICE_ID_1,
+            SERVICE_1,
+            DEFAULT_ADVERTISING_OPTION,
+            TEST_CLIENT_UID_1
+        ) }
 
         val socketCbCaptor = ArgumentCaptor.forClass(SocketCallback::class.java)
         verify(socketProvider).requestSocket(eq(TEST_NETWORK_1), socketCbCaptor.capture())
@@ -255,7 +308,9 @@
 
         doReturn(false).`when`(mockInterfaceAdvertiser1).isProbing(SERVICE_ID_1)
         postSync { intAdvCbCaptor.value.onServiceProbingSucceeded(
-                mockInterfaceAdvertiser1, SERVICE_ID_1) }
+            mockInterfaceAdvertiser1,
+            SERVICE_ID_1
+        ) }
         verify(cb).onRegisterServiceSucceeded(eq(SERVICE_ID_1), argThat { it.matches(SERVICE_1) })
         verify(cb).onOffloadStartOrUpdate(eq(TEST_INTERFACE1), eq(OFFLOAD_SERVICEINFO_NO_SUBTYPE))
 
@@ -296,12 +351,18 @@
     fun testAddService_AllNetworksWithSubType() {
         val advertiser =
             MdnsAdvertiser(thread.looper, socketProvider, cb, mockDeps, sharedlog, flags, context)
-        postSync { advertiser.addOrUpdateService(SERVICE_ID_1, ALL_NETWORKS_SERVICE_SUBTYPE,
-                DEFAULT_ADVERTISING_OPTION, TEST_CLIENT_UID_1) }
+        postSync { advertiser.addOrUpdateService(
+            SERVICE_ID_1,
+            ALL_NETWORKS_SERVICE_SUBTYPE,
+            DEFAULT_ADVERTISING_OPTION,
+            TEST_CLIENT_UID_1
+        ) }
 
         val socketCbCaptor = ArgumentCaptor.forClass(SocketCallback::class.java)
-        verify(socketProvider).requestSocket(eq(ALL_NETWORKS_SERVICE_SUBTYPE.network),
-                socketCbCaptor.capture())
+        verify(socketProvider).requestSocket(
+            eq(ALL_NETWORKS_SERVICE_SUBTYPE.network),
+            socketCbCaptor.capture()
+        )
 
         val socketCb = socketCbCaptor.value
         postSync { socketCb.onSocketCreated(TEST_SOCKETKEY_1, mockSocket1, listOf(TEST_LINKADDR)) }
@@ -309,30 +370,56 @@
 
         val intAdvCbCaptor1 = ArgumentCaptor.forClass(MdnsInterfaceAdvertiser.Callback::class.java)
         val intAdvCbCaptor2 = ArgumentCaptor.forClass(MdnsInterfaceAdvertiser.Callback::class.java)
-        verify(mockDeps).makeAdvertiser(eq(mockSocket1), eq(listOf(TEST_LINKADDR)),
-                eq(thread.looper), any(), intAdvCbCaptor1.capture(), eq(TEST_HOSTNAME), any(), any()
+        verify(mockDeps).makeAdvertiser(
+            eq(mockSocket1),
+            eq(listOf(TEST_LINKADDR)),
+            eq(thread.looper),
+            any(),
+            intAdvCbCaptor1.capture(),
+            eq(TEST_HOSTNAME),
+            any(),
+            any()
         )
-        verify(mockDeps).makeAdvertiser(eq(mockSocket2), eq(listOf(TEST_LINKADDR)),
-                eq(thread.looper), any(), intAdvCbCaptor2.capture(), eq(TEST_HOSTNAME), any(), any()
+        verify(mockDeps).makeAdvertiser(
+            eq(mockSocket2),
+            eq(listOf(TEST_LINKADDR)),
+            eq(thread.looper),
+            any(),
+            intAdvCbCaptor2.capture(),
+            eq(TEST_HOSTNAME),
+            any(),
+            any()
         )
         verify(mockInterfaceAdvertiser1).addService(
-                anyInt(), eq(ALL_NETWORKS_SERVICE_SUBTYPE), any())
+            anyInt(),
+            eq(ALL_NETWORKS_SERVICE_SUBTYPE),
+            any()
+        )
         verify(mockInterfaceAdvertiser2).addService(
-                anyInt(), eq(ALL_NETWORKS_SERVICE_SUBTYPE), any())
+            anyInt(),
+            eq(ALL_NETWORKS_SERVICE_SUBTYPE),
+            any()
+        )
 
         doReturn(false).`when`(mockInterfaceAdvertiser1).isProbing(SERVICE_ID_1)
         postSync { intAdvCbCaptor1.value.onServiceProbingSucceeded(
-                mockInterfaceAdvertiser1, SERVICE_ID_1) }
+            mockInterfaceAdvertiser1,
+            SERVICE_ID_1
+        ) }
         verify(cb).onOffloadStartOrUpdate(eq(TEST_INTERFACE1), eq(OFFLOAD_SERVICEINFO))
 
         // Need both advertisers to finish probing and call onRegisterServiceSucceeded
         verify(cb, never()).onRegisterServiceSucceeded(anyInt(), any())
         doReturn(false).`when`(mockInterfaceAdvertiser2).isProbing(SERVICE_ID_1)
         postSync { intAdvCbCaptor2.value.onServiceProbingSucceeded(
-                mockInterfaceAdvertiser2, SERVICE_ID_1) }
+            mockInterfaceAdvertiser2,
+            SERVICE_ID_1
+        ) }
         verify(cb).onOffloadStartOrUpdate(eq(TEST_INTERFACE2), eq(OFFLOAD_SERVICEINFO))
-        verify(cb).onRegisterServiceSucceeded(eq(SERVICE_ID_1),
-                argThat { it.matches(ALL_NETWORKS_SERVICE_SUBTYPE) })
+        verify(cb).onRegisterServiceSucceeded(
+            eq(SERVICE_ID_1),
+            argThat { it.matches(ALL_NETWORKS_SERVICE_SUBTYPE) }
+        )
 
         // Services are conflicted.
         postSync {
@@ -378,19 +465,30 @@
         val advertiser =
             MdnsAdvertiser(thread.looper, socketProvider, cb, mockDeps, sharedlog, flags, context)
         postSync {
-            advertiser.addOrUpdateService(SERVICE_ID_1, SERVICE_1, DEFAULT_ADVERTISING_OPTION,
-                    TEST_CLIENT_UID_1)
-            advertiser.addOrUpdateService(SERVICE_ID_2,
+            advertiser.addOrUpdateService(
+                SERVICE_ID_1,
+                SERVICE_1,
+                DEFAULT_ADVERTISING_OPTION,
+                TEST_CLIENT_UID_1
+            )
+            advertiser.addOrUpdateService(
+                SERVICE_ID_2,
                 NsdServiceInfo("TestService2", "_PRIORITYTEST._udp").apply {
                     port = 12345
                     hostAddresses = listOf(TEST_ADDR)
-                }, DEFAULT_ADVERTISING_OPTION, TEST_CLIENT_UID_1)
+                },
+                DEFAULT_ADVERTISING_OPTION,
+                TEST_CLIENT_UID_1
+            )
             advertiser.addOrUpdateService(
                 SERVICE_ID_3,
                 NsdServiceInfo("TestService3", "_notprioritized._tcp").apply {
                     port = 12345
                     hostAddresses = listOf(TEST_ADDR)
-                }, DEFAULT_ADVERTISING_OPTION, TEST_CLIENT_UID_1)
+                },
+                DEFAULT_ADVERTISING_OPTION,
+                TEST_CLIENT_UID_1
+            )
         }
 
         val socketCbCaptor = ArgumentCaptor.forClass(SocketCallback::class.java)
@@ -400,8 +498,15 @@
         postSync { socketCb.onSocketCreated(TEST_SOCKETKEY_1, mockSocket1, listOf(TEST_LINKADDR)) }
 
         val intAdvCbCaptor1 = ArgumentCaptor.forClass(MdnsInterfaceAdvertiser.Callback::class.java)
-        verify(mockDeps).makeAdvertiser(eq(mockSocket1), eq(listOf(TEST_LINKADDR)),
-            eq(thread.looper), any(), intAdvCbCaptor1.capture(), eq(TEST_HOSTNAME), any(), any()
+        verify(mockDeps).makeAdvertiser(
+            eq(mockSocket1),
+            eq(listOf(TEST_LINKADDR)),
+            eq(thread.looper),
+            any(),
+            intAdvCbCaptor1.capture(),
+            eq(TEST_HOSTNAME),
+            any(),
+            any()
         )
 
         doReturn(false).`when`(mockInterfaceAdvertiser1).isProbing(SERVICE_ID_1)
@@ -433,30 +538,126 @@
     }
 
     @Test
+    fun testAddService_NoOffloadForServiceTypeInDenyList() {
+        val advertiser =
+            MdnsAdvertiser(thread.looper, socketProvider, cb, mockDeps, sharedlog, flags, context)
+        postSync {
+            advertiser.addOrUpdateService(
+                SERVICE_ID_1,
+                GOOGLEZONE_SERVICE,
+                DEFAULT_ADVERTISING_OPTION,
+                TEST_CLIENT_UID_1
+            )
+        }
+        val socketCbCaptor = ArgumentCaptor.forClass(SocketCallback::class.java)
+        verify(socketProvider).requestSocket(eq(SERVICE_1.network), socketCbCaptor.capture())
+
+        val socketCb = socketCbCaptor.value
+        postSync { socketCb.onSocketCreated(TEST_SOCKETKEY_1, mockSocket1, listOf(TEST_LINKADDR)) }
+
+        val intAdvCbCaptor1 = ArgumentCaptor.forClass(MdnsInterfaceAdvertiser.Callback::class.java)
+        verify(mockDeps).makeAdvertiser(
+            eq(mockSocket1),
+            eq(listOf(TEST_LINKADDR)),
+            eq(thread.looper),
+            any(),
+            intAdvCbCaptor1.capture(),
+            eq(TEST_HOSTNAME),
+            any(),
+            any()
+        )
+
+        doReturn(false).`when`(mockInterfaceAdvertiser1).isProbing(SERVICE_ID_1)
+        postSync {
+            intAdvCbCaptor1.value.onServiceProbingSucceeded(mockInterfaceAdvertiser1, SERVICE_ID_1)
+        }
+
+        verify(cb, never()).onOffloadStartOrUpdate(eq(TEST_INTERFACE1), any())
+    }
+
+    @Test
+    fun testAddService_NoSubtypeForGoogleCastOffload() {
+        val advertiser =
+            MdnsAdvertiser(thread.looper, socketProvider, cb, mockDeps, sharedlog, flags, context)
+        postSync {
+            advertiser.addOrUpdateService(
+                SERVICE_ID_1,
+                GOOGLECAST_SERVICE,
+                DEFAULT_ADVERTISING_OPTION,
+                TEST_CLIENT_UID_1
+            )
+        }
+        val socketCbCaptor = ArgumentCaptor.forClass(SocketCallback::class.java)
+        verify(socketProvider).requestSocket(eq(SERVICE_1.network), socketCbCaptor.capture())
+
+        val socketCb = socketCbCaptor.value
+        postSync { socketCb.onSocketCreated(TEST_SOCKETKEY_1, mockSocket1, listOf(TEST_LINKADDR)) }
+
+        val intAdvCbCaptor1 = ArgumentCaptor.forClass(MdnsInterfaceAdvertiser.Callback::class.java)
+        verify(mockDeps).makeAdvertiser(
+            eq(mockSocket1),
+            eq(listOf(TEST_LINKADDR)),
+            eq(thread.looper),
+            any(),
+            intAdvCbCaptor1.capture(),
+            eq(TEST_HOSTNAME),
+            any(),
+            any()
+        )
+
+        doReturn(false).`when`(mockInterfaceAdvertiser1).isProbing(SERVICE_ID_1)
+        postSync {
+            intAdvCbCaptor1.value.onServiceProbingSucceeded(mockInterfaceAdvertiser1, SERVICE_ID_1)
+        }
+
+        verify(cb).onOffloadStartOrUpdate(eq(TEST_INTERFACE1), eq(OFFLOAD_SERVICE_INFO_GOOGLECAST))
+    }
+
+    @Test
     fun testAddService_Conflicts() {
         val advertiser =
             MdnsAdvertiser(thread.looper, socketProvider, cb, mockDeps, sharedlog, flags, context)
-        postSync { advertiser.addOrUpdateService(SERVICE_ID_1, SERVICE_1,
-                DEFAULT_ADVERTISING_OPTION, TEST_CLIENT_UID_1) }
+        postSync { advertiser.addOrUpdateService(
+            SERVICE_ID_1,
+            SERVICE_1,
+            DEFAULT_ADVERTISING_OPTION,
+            TEST_CLIENT_UID_1
+        ) }
 
         val oneNetSocketCbCaptor = ArgumentCaptor.forClass(SocketCallback::class.java)
         verify(socketProvider).requestSocket(eq(TEST_NETWORK_1), oneNetSocketCbCaptor.capture())
         val oneNetSocketCb = oneNetSocketCbCaptor.value
 
         // Register a service with the same name on all networks (name conflict)
-        postSync { advertiser.addOrUpdateService(SERVICE_ID_2, ALL_NETWORKS_SERVICE,
-                DEFAULT_ADVERTISING_OPTION, TEST_CLIENT_UID_1) }
+        postSync { advertiser.addOrUpdateService(
+            SERVICE_ID_2,
+            ALL_NETWORKS_SERVICE,
+            DEFAULT_ADVERTISING_OPTION,
+            TEST_CLIENT_UID_1
+        ) }
         val allNetSocketCbCaptor = ArgumentCaptor.forClass(SocketCallback::class.java)
         verify(socketProvider).requestSocket(eq(null), allNetSocketCbCaptor.capture())
         val allNetSocketCb = allNetSocketCbCaptor.value
 
-        postSync { advertiser.addOrUpdateService(LONG_SERVICE_ID_1, LONG_SERVICE_1,
-                DEFAULT_ADVERTISING_OPTION, TEST_CLIENT_UID_1) }
-        postSync { advertiser.addOrUpdateService(LONG_SERVICE_ID_2, LONG_ALL_NETWORKS_SERVICE,
-                DEFAULT_ADVERTISING_OPTION, TEST_CLIENT_UID_1) }
+        postSync { advertiser.addOrUpdateService(
+            LONG_SERVICE_ID_1,
+            LONG_SERVICE_1,
+            DEFAULT_ADVERTISING_OPTION,
+            TEST_CLIENT_UID_1
+        ) }
+        postSync { advertiser.addOrUpdateService(
+            LONG_SERVICE_ID_2,
+            LONG_ALL_NETWORKS_SERVICE,
+            DEFAULT_ADVERTISING_OPTION,
+            TEST_CLIENT_UID_1
+        ) }
 
-        postSync { advertiser.addOrUpdateService(CASE_INSENSITIVE_TEST_SERVICE_ID,
-                ALL_NETWORKS_SERVICE_2, DEFAULT_ADVERTISING_OPTION, TEST_CLIENT_UID_1) }
+        postSync { advertiser.addOrUpdateService(
+            CASE_INSENSITIVE_TEST_SERVICE_ID,
+            ALL_NETWORKS_SERVICE_2,
+            DEFAULT_ADVERTISING_OPTION,
+            TEST_CLIENT_UID_1
+        ) }
 
         // Callbacks for matching network and all networks both get the socket
         postSync {
@@ -465,7 +666,9 @@
         }
 
         val expectedRenamed = NsdServiceInfo(
-                "${ALL_NETWORKS_SERVICE.serviceName} (2)", ALL_NETWORKS_SERVICE.serviceType).apply {
+            "${ALL_NETWORKS_SERVICE.serviceName} (2)",
+            ALL_NETWORKS_SERVICE.serviceType
+        ).apply {
             port = ALL_NETWORKS_SERVICE.port
             hostAddresses = ALL_NETWORKS_SERVICE.hostAddresses
             network = ALL_NETWORKS_SERVICE.network
@@ -473,14 +676,16 @@
 
         val expectedLongRenamed = NsdServiceInfo(
             "${LONG_ALL_NETWORKS_SERVICE.serviceName.dropLast(4)} (2)",
-            LONG_ALL_NETWORKS_SERVICE.serviceType).apply {
+            LONG_ALL_NETWORKS_SERVICE.serviceType
+        ).apply {
             port = LONG_ALL_NETWORKS_SERVICE.port
             hostAddresses = LONG_ALL_NETWORKS_SERVICE.hostAddresses
             network = LONG_ALL_NETWORKS_SERVICE.network
         }
 
         val expectedCaseInsensitiveRenamed = NsdServiceInfo(
-            "${ALL_NETWORKS_SERVICE_2.serviceName} (3)", ALL_NETWORKS_SERVICE_2.serviceType
+            "${ALL_NETWORKS_SERVICE_2.serviceName} (3)",
+            ALL_NETWORKS_SERVICE_2.serviceType
         ).apply {
             port = ALL_NETWORKS_SERVICE_2.port
             hostAddresses = ALL_NETWORKS_SERVICE_2.hostAddresses
@@ -488,30 +693,58 @@
         }
 
         val intAdvCbCaptor = ArgumentCaptor.forClass(MdnsInterfaceAdvertiser.Callback::class.java)
-        verify(mockDeps).makeAdvertiser(eq(mockSocket1), eq(listOf(TEST_LINKADDR)),
-                eq(thread.looper), any(), intAdvCbCaptor.capture(), eq(TEST_HOSTNAME), any(), any()
+        verify(mockDeps).makeAdvertiser(
+            eq(mockSocket1),
+            eq(listOf(TEST_LINKADDR)),
+            eq(thread.looper),
+            any(),
+            intAdvCbCaptor.capture(),
+            eq(TEST_HOSTNAME),
+            any(),
+            any()
         )
-        verify(mockInterfaceAdvertiser1).addService(eq(SERVICE_ID_1),
-                argThat { it.matches(SERVICE_1) }, any())
-        verify(mockInterfaceAdvertiser1).addService(eq(SERVICE_ID_2),
-                argThat { it.matches(expectedRenamed) }, any())
-        verify(mockInterfaceAdvertiser1).addService(eq(LONG_SERVICE_ID_1),
-                argThat { it.matches(LONG_SERVICE_1) }, any())
-        verify(mockInterfaceAdvertiser1).addService(eq(LONG_SERVICE_ID_2),
-            argThat { it.matches(expectedLongRenamed) }, any())
-        verify(mockInterfaceAdvertiser1).addService(eq(CASE_INSENSITIVE_TEST_SERVICE_ID),
-            argThat { it.matches(expectedCaseInsensitiveRenamed) }, any())
+        verify(mockInterfaceAdvertiser1).addService(
+            eq(SERVICE_ID_1),
+            argThat { it.matches(SERVICE_1) },
+            any()
+        )
+        verify(mockInterfaceAdvertiser1).addService(
+            eq(SERVICE_ID_2),
+            argThat { it.matches(expectedRenamed) },
+            any()
+        )
+        verify(mockInterfaceAdvertiser1).addService(
+            eq(LONG_SERVICE_ID_1),
+            argThat { it.matches(LONG_SERVICE_1) },
+            any()
+        )
+        verify(mockInterfaceAdvertiser1).addService(
+            eq(LONG_SERVICE_ID_2),
+            argThat { it.matches(expectedLongRenamed) },
+            any()
+        )
+        verify(mockInterfaceAdvertiser1).addService(
+            eq(CASE_INSENSITIVE_TEST_SERVICE_ID),
+            argThat { it.matches(expectedCaseInsensitiveRenamed) },
+            any()
+        )
 
         doReturn(false).`when`(mockInterfaceAdvertiser1).isProbing(SERVICE_ID_1)
         postSync { intAdvCbCaptor.value.onServiceProbingSucceeded(
-                mockInterfaceAdvertiser1, SERVICE_ID_1) }
+            mockInterfaceAdvertiser1,
+            SERVICE_ID_1
+        ) }
         verify(cb).onRegisterServiceSucceeded(eq(SERVICE_ID_1), argThat { it.matches(SERVICE_1) })
 
         doReturn(false).`when`(mockInterfaceAdvertiser1).isProbing(SERVICE_ID_2)
         postSync { intAdvCbCaptor.value.onServiceProbingSucceeded(
-                mockInterfaceAdvertiser1, SERVICE_ID_2) }
-        verify(cb).onRegisterServiceSucceeded(eq(SERVICE_ID_2),
-                argThat { it.matches(expectedRenamed) })
+            mockInterfaceAdvertiser1,
+            SERVICE_ID_2
+        ) }
+        verify(cb).onRegisterServiceSucceeded(
+            eq(SERVICE_ID_2),
+            argThat { it.matches(expectedRenamed) }
+        )
 
         postSync { oneNetSocketCb.onInterfaceDestroyed(TEST_SOCKETKEY_1, mockSocket1) }
         postSync { allNetSocketCb.onInterfaceDestroyed(TEST_SOCKETKEY_1, mockSocket1) }
@@ -523,10 +756,21 @@
     @Test
     fun testAddOrUpdateService_Updates() {
         val advertiser =
-                MdnsAdvertiser(thread.looper, socketProvider, cb, mockDeps, sharedlog, flags,
-                    context)
-        postSync { advertiser.addOrUpdateService(SERVICE_ID_1, ALL_NETWORKS_SERVICE,
-                DEFAULT_ADVERTISING_OPTION, TEST_CLIENT_UID_1) }
+                MdnsAdvertiser(
+                    thread.looper,
+                    socketProvider,
+                    cb,
+                    mockDeps,
+                    sharedlog,
+                    flags,
+                    context
+                )
+        postSync { advertiser.addOrUpdateService(
+            SERVICE_ID_1,
+            ALL_NETWORKS_SERVICE,
+            DEFAULT_ADVERTISING_OPTION,
+            TEST_CLIENT_UID_1
+        ) }
 
         val socketCbCaptor = ArgumentCaptor.forClass(SocketCallback::class.java)
         verify(socketProvider).requestSocket(eq(null), socketCbCaptor.capture())
@@ -534,41 +778,70 @@
         val socketCb = socketCbCaptor.value
         postSync { socketCb.onSocketCreated(TEST_SOCKETKEY_1, mockSocket1, listOf(TEST_LINKADDR)) }
 
-        verify(mockInterfaceAdvertiser1).addService(eq(SERVICE_ID_1),
-                argThat { it.matches(ALL_NETWORKS_SERVICE) }, any())
+        verify(mockInterfaceAdvertiser1).addService(
+            eq(SERVICE_ID_1),
+            argThat { it.matches(ALL_NETWORKS_SERVICE) },
+            any()
+        )
 
         val updateOptions = MdnsAdvertisingOptions.newBuilder().setIsOnlyUpdate(true).build()
 
         // Update with serviceId that is not registered yet should fail
-        postSync { advertiser.addOrUpdateService(SERVICE_ID_2, ALL_NETWORKS_SERVICE_SUBTYPE,
-                updateOptions, TEST_CLIENT_UID_1) }
+        postSync { advertiser.addOrUpdateService(
+            SERVICE_ID_2,
+            ALL_NETWORKS_SERVICE_SUBTYPE,
+            updateOptions,
+            TEST_CLIENT_UID_1
+        ) }
         verify(cb).onRegisterServiceFailed(SERVICE_ID_2, NsdManager.FAILURE_INTERNAL_ERROR)
 
         // Update service with different NsdServiceInfo should fail
-        postSync { advertiser.addOrUpdateService(SERVICE_ID_1, SERVICE_1_SUBTYPE, updateOptions,
-                TEST_CLIENT_UID_1) }
+        postSync { advertiser.addOrUpdateService(
+            SERVICE_ID_1,
+            SERVICE_1_SUBTYPE,
+            updateOptions,
+            TEST_CLIENT_UID_1
+        ) }
         verify(cb).onRegisterServiceFailed(SERVICE_ID_1, NsdManager.FAILURE_INTERNAL_ERROR)
 
         // Update service with same NsdServiceInfo but different subType should succeed
-        postSync { advertiser.addOrUpdateService(SERVICE_ID_1, ALL_NETWORKS_SERVICE_SUBTYPE,
-                updateOptions, TEST_CLIENT_UID_1) }
+        postSync { advertiser.addOrUpdateService(
+            SERVICE_ID_1,
+            ALL_NETWORKS_SERVICE_SUBTYPE,
+            updateOptions,
+            TEST_CLIENT_UID_1
+        ) }
         verify(mockInterfaceAdvertiser1).updateService(eq(SERVICE_ID_1), eq(setOf(TEST_SUBTYPE)))
 
         // Newly created MdnsInterfaceAdvertiser will get addService() call.
         postSync { socketCb.onSocketCreated(TEST_SOCKETKEY_2, mockSocket2, listOf(TEST_LINKADDR2)) }
-        verify(mockInterfaceAdvertiser2).addService(eq(SERVICE_ID_1),
-                argThat { it.matches(ALL_NETWORKS_SERVICE_SUBTYPE) }, any())
+        verify(mockInterfaceAdvertiser2).addService(
+            eq(SERVICE_ID_1),
+            argThat { it.matches(ALL_NETWORKS_SERVICE_SUBTYPE) },
+            any()
+        )
     }
 
     @Test
     fun testAddOrUpdateService_customTtl_registeredSuccess() {
         val advertiser = MdnsAdvertiser(
-                thread.looper, socketProvider, cb, mockDeps, sharedlog, flags, context)
+            thread.looper,
+            socketProvider,
+            cb,
+            mockDeps,
+            sharedlog,
+            flags,
+            context
+        )
         val updateOptions =
                 MdnsAdvertisingOptions.newBuilder().setTtl(Duration.ofSeconds(30)).build()
 
-        postSync { advertiser.addOrUpdateService(SERVICE_ID_1, ALL_NETWORKS_SERVICE,
-                updateOptions, TEST_CLIENT_UID_1) }
+        postSync { advertiser.addOrUpdateService(
+            SERVICE_ID_1,
+            ALL_NETWORKS_SERVICE,
+            updateOptions,
+            TEST_CLIENT_UID_1
+        ) }
 
         val socketCbCaptor = ArgumentCaptor.forClass(SocketCallback::class.java)
         verify(socketProvider).requestSocket(eq(null), socketCbCaptor.capture())
@@ -582,8 +855,12 @@
         val advertiser =
             MdnsAdvertiser(thread.looper, socketProvider, cb, mockDeps, sharedlog, flags, context)
         verify(mockDeps, times(1)).generateHostname(anyBoolean())
-        postSync { advertiser.addOrUpdateService(SERVICE_ID_1, SERVICE_1,
-                DEFAULT_ADVERTISING_OPTION, TEST_CLIENT_UID_1) }
+        postSync { advertiser.addOrUpdateService(
+            SERVICE_ID_1,
+            SERVICE_1,
+            DEFAULT_ADVERTISING_OPTION,
+            TEST_CLIENT_UID_1
+        ) }
         postSync { advertiser.removeService(SERVICE_ID_1) }
         verify(mockDeps, times(2)).generateHostname(anyBoolean())
     }
@@ -593,8 +870,12 @@
         val flags = MdnsFeatureFlags.newBuilder().setIsShortHostnamesEnabled(shortHostname).build()
         val advertiser =
             MdnsAdvertiser(thread.looper, socketProvider, cb, mockDeps, sharedlog, flags, context)
-        postSync { advertiser.addOrUpdateService(SERVICE_ID_1, SERVICE_1,
-            DEFAULT_ADVERTISING_OPTION, TEST_CLIENT_UID_1) }
+        postSync { advertiser.addOrUpdateService(
+            SERVICE_ID_1,
+            SERVICE_1,
+            DEFAULT_ADVERTISING_OPTION,
+            TEST_CLIENT_UID_1
+        ) }
 
         val socketCbCaptor = ArgumentCaptor.forClass(SocketCallback::class.java)
         verify(socketProvider).requestSocket(eq(TEST_NETWORK_1), socketCbCaptor.capture())
@@ -621,8 +902,10 @@
         val hostname = doHostnameGenerationTest(shortHostname = true)
         // Short hostnames are [8 uppercase letters or digits].local
         assertEquals(2, hostname.size)
-        assertTrue(Regex("Android_[A-Z0-9]{8}").matches(hostname[0]),
-            "Unexpected hostname: ${hostname.contentToString()}")
+        assertTrue(
+            Regex("Android_[A-Z0-9]{8}").matches(hostname[0]),
+            "Unexpected hostname: ${hostname.contentToString()}"
+        )
         assertEquals("local", hostname[1])
     }
 
@@ -631,8 +914,10 @@
         val hostname = doHostnameGenerationTest(shortHostname = false)
         // Long hostnames are Android_[32 lowercase hex characters].local
         assertEquals(2, hostname.size)
-        assertTrue(Regex("Android_[a-f0-9]{32}").matches(hostname[0]),
-            "Unexpected hostname: ${hostname.contentToString()}")
+        assertTrue(
+            Regex("Android_[a-f0-9]{32}").matches(hostname[0]),
+            "Unexpected hostname: ${hostname.contentToString()}"
+        )
         assertEquals("local", hostname[1])
     }
 
diff --git a/tests/unit/java/com/android/server/connectivity/mdns/MdnsDiscoveryManagerTests.java b/tests/unit/java/com/android/server/connectivity/mdns/MdnsDiscoveryManagerTests.java
index ab2fb99..758b822 100644
--- a/tests/unit/java/com/android/server/connectivity/mdns/MdnsDiscoveryManagerTests.java
+++ b/tests/unit/java/com/android/server/connectivity/mdns/MdnsDiscoveryManagerTests.java
@@ -19,8 +19,6 @@
 import static com.android.testutils.DevSdkIgnoreRuleKt.SC_V2;
 
 import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.Mockito.doReturn;
@@ -35,12 +33,10 @@
 import android.net.Network;
 import android.os.Handler;
 import android.os.HandlerThread;
-import android.testing.TestableLooper;
 import android.text.TextUtils;
 import android.util.Pair;
 
 import com.android.net.module.util.SharedLog;
-import com.android.server.connectivity.mdns.MdnsDiscoveryManager.DiscoveryExecutor;
 import com.android.server.connectivity.mdns.MdnsSocketClientBase.SocketCreationCallback;
 import com.android.testutils.DevSdkIgnoreRule;
 import com.android.testutils.DevSdkIgnoreRunner;
@@ -60,9 +56,7 @@
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
-import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.ScheduledExecutorService;
-import java.util.concurrent.TimeUnit;
 
 /** Tests for {@link MdnsDiscoveryManager}. */
 @DevSdkIgnoreRunner.MonitorThreadLeak
@@ -435,48 +429,6 @@
     }
 
     @Test
-    public void testDiscoveryExecutor() throws Exception {
-        final TestableLooper testableLooper = new TestableLooper(thread.getLooper());
-        final DiscoveryExecutor executor = new DiscoveryExecutor(testableLooper.getLooper());
-        try {
-            // Verify the checkAndRunOnHandlerThread method
-            final CompletableFuture<Boolean> future1 = new CompletableFuture<>();
-            executor.checkAndRunOnHandlerThread(()-> future1.complete(true));
-            assertTrue(future1.isDone());
-            assertTrue(future1.get(DEFAULT_TIMEOUT, TimeUnit.MILLISECONDS));
-
-            // Verify the execute method
-            final CompletableFuture<Boolean> future2 = new CompletableFuture<>();
-            executor.execute(()-> future2.complete(true));
-            testableLooper.processAllMessages();
-            assertTrue(future2.isDone());
-            assertTrue(future2.get(DEFAULT_TIMEOUT, TimeUnit.MILLISECONDS));
-
-            // Verify the executeDelayed method
-            final CompletableFuture<Boolean> future3 = new CompletableFuture<>();
-            // Schedule a task with 999 ms delay
-            executor.executeDelayed(()-> future3.complete(true), 999L);
-            testableLooper.processAllMessages();
-            assertFalse(future3.isDone());
-
-            // 500 ms have elapsed but do not exceed the target time (999 ms)
-            // The function should not be executed.
-            testableLooper.moveTimeForward(500L);
-            testableLooper.processAllMessages();
-            assertFalse(future3.isDone());
-
-            // 500 ms have elapsed again and have exceeded the target time (999 ms).
-            // The function should be executed.
-            testableLooper.moveTimeForward(500L);
-            testableLooper.processAllMessages();
-            assertTrue(future3.isDone());
-            assertTrue(future3.get(500L, TimeUnit.MILLISECONDS));
-        } finally {
-            testableLooper.destroy();
-        }
-    }
-
-    @Test
     public void testRemoveServicesAfterAllListenersUnregistered() throws IOException {
         final MdnsFeatureFlags mdnsFeatureFlags = MdnsFeatureFlags.newBuilder()
                 .setIsCachedServicesRemovalEnabled(true)
diff --git a/tests/unit/java/com/android/server/connectivity/mdns/MdnsServiceCacheTest.kt b/tests/unit/java/com/android/server/connectivity/mdns/MdnsServiceCacheTest.kt
index 0a8f108..976dfa9 100644
--- a/tests/unit/java/com/android/server/connectivity/mdns/MdnsServiceCacheTest.kt
+++ b/tests/unit/java/com/android/server/connectivity/mdns/MdnsServiceCacheTest.kt
@@ -208,7 +208,10 @@
     @Test
     fun testServiceExpiredAndSendCallbacks() {
         val serviceCache = MdnsServiceCache(
-                thread.looper, makeFlags(isExpiredServicesRemovalEnabled = true), clock)
+                thread.looper,
+            makeFlags(isExpiredServicesRemovalEnabled = true),
+            clock
+        )
         // Register service expired callbacks
         val callback1 = ExpiredRecord()
         val callback2 = ExpiredRecord()
@@ -218,12 +221,21 @@
         doReturn(TEST_ELAPSED_REALTIME_MS).`when`(clock).elapsedRealtime()
 
         // Add multiple services with different ttl time.
-        addOrUpdateService(serviceCache, cacheKey1, createResponse(SERVICE_NAME_1, SERVICE_TYPE_1,
-                DEFAULT_TTL_TIME_MS))
-        addOrUpdateService(serviceCache, cacheKey1, createResponse(SERVICE_NAME_2, SERVICE_TYPE_1,
-                DEFAULT_TTL_TIME_MS + 20L))
-        addOrUpdateService(serviceCache, cacheKey2, createResponse(SERVICE_NAME_3, SERVICE_TYPE_2,
-                DEFAULT_TTL_TIME_MS + 10L))
+        addOrUpdateService(serviceCache, cacheKey1, createResponse(
+            SERVICE_NAME_1,
+            SERVICE_TYPE_1,
+                DEFAULT_TTL_TIME_MS
+        ))
+        addOrUpdateService(serviceCache, cacheKey1, createResponse(
+            SERVICE_NAME_2,
+            SERVICE_TYPE_1,
+                DEFAULT_TTL_TIME_MS + 20L
+        ))
+        addOrUpdateService(serviceCache, cacheKey2, createResponse(
+            SERVICE_NAME_3,
+            SERVICE_TYPE_2,
+                DEFAULT_TTL_TIME_MS + 10L
+        ))
 
         // Check the service expiration immediately. Should be no callback.
         assertEquals(2, getServices(serviceCache, cacheKey1).size)
@@ -252,16 +264,25 @@
     @Test
     fun testRemoveExpiredServiceWhenGetting() {
         val serviceCache = MdnsServiceCache(
-                thread.looper, makeFlags(isExpiredServicesRemovalEnabled = true), clock)
+                thread.looper,
+            makeFlags(isExpiredServicesRemovalEnabled = true),
+            clock
+        )
 
         doReturn(TEST_ELAPSED_REALTIME_MS).`when`(clock).elapsedRealtime()
-        addOrUpdateService(serviceCache, cacheKey1,
-                createResponse(SERVICE_NAME_1, SERVICE_TYPE_1, 1L /* ttlTime */))
+        addOrUpdateService(
+            serviceCache,
+            cacheKey1,
+                createResponse(SERVICE_NAME_1, SERVICE_TYPE_1, 1L /* ttlTime */)
+        )
         doReturn(TEST_ELAPSED_REALTIME_MS + 2L).`when`(clock).elapsedRealtime()
         assertNull(getService(serviceCache, SERVICE_NAME_1, cacheKey1))
 
-        addOrUpdateService(serviceCache, cacheKey2,
-                createResponse(SERVICE_NAME_2, SERVICE_TYPE_2, 3L /* ttlTime */))
+        addOrUpdateService(
+            serviceCache,
+            cacheKey2,
+                createResponse(SERVICE_NAME_2, SERVICE_TYPE_2, 3L /* ttlTime */)
+        )
         doReturn(TEST_ELAPSED_REALTIME_MS + 4L).`when`(clock).elapsedRealtime()
         assertEquals(0, getServices(serviceCache, cacheKey2).size)
     }
@@ -334,8 +355,11 @@
     ): MdnsResponse {
         val serviceName = "$serviceInstanceName.$serviceType".split(".").toTypedArray()
         val response = MdnsResponse(
-                0 /* now */, "$serviceInstanceName.$serviceType".split(".").toTypedArray(),
-                socketKey.interfaceIndex, socketKey.network)
+                0 /* now */,
+            "$serviceInstanceName.$serviceType".split(".").toTypedArray(),
+                socketKey.interfaceIndex,
+            socketKey.network
+        )
 
         // Set PTR record
         val pointerRecord = MdnsPointerRecord(
@@ -343,7 +367,8 @@
                 TEST_ELAPSED_REALTIME_MS /* receiptTimeMillis */,
                 false /* cacheFlush */,
                 ttlTime /* ttlMillis */,
-                serviceName)
+                serviceName
+        )
         response.addPointerRecord(pointerRecord)
 
         // Set SRV record.
@@ -355,7 +380,8 @@
                 0 /* servicePriority */,
                 0 /* serviceWeight */,
                 12345 /* port */,
-                arrayOf("hostname"))
+                arrayOf("hostname")
+        )
         response.serviceRecord = serviceRecord
         return response
     }
diff --git a/tests/unit/java/com/android/server/connectivity/mdns/MdnsServiceTypeClientTests.java b/tests/unit/java/com/android/server/connectivity/mdns/MdnsServiceTypeClientTests.java
index 67f9d9c..dad03e0 100644
--- a/tests/unit/java/com/android/server/connectivity/mdns/MdnsServiceTypeClientTests.java
+++ b/tests/unit/java/com/android/server/connectivity/mdns/MdnsServiceTypeClientTests.java
@@ -59,6 +59,7 @@
 import android.text.TextUtils;
 
 import com.android.net.module.util.CollectionUtils;
+import com.android.net.module.util.RealtimeScheduler;
 import com.android.net.module.util.SharedLog;
 import com.android.server.connectivity.mdns.MdnsServiceInfo.TextEntry;
 import com.android.server.connectivity.mdns.util.MdnsUtils;
@@ -127,6 +128,8 @@
     private SharedLog mockSharedLog;
     @Mock
     private MdnsServiceTypeClient.Dependencies mockDeps;
+    @Mock
+    private RealtimeScheduler mockRealtimeScheduler;
     @Captor
     private ArgumentCaptor<MdnsServiceInfo> serviceInfoCaptor;
 
@@ -145,6 +148,7 @@
     private Message delayMessage = null;
     private Handler realHandler = null;
     private MdnsFeatureFlags featureFlags = MdnsFeatureFlags.newBuilder().build();
+    private Message message = null;
 
     @Before
     @SuppressWarnings("DoNotMock")
@@ -244,10 +248,21 @@
             return true;
         }).when(mockDeps).sendMessage(any(Handler.class), any(Message.class));
 
-        client = makeMdnsServiceTypeClient();
+        doAnswer(inv -> {
+            realHandler = (Handler) inv.getArguments()[0];
+            return mockRealtimeScheduler;
+        }).when(mockDeps).createRealtimeScheduler(any(Handler.class));
+
+        doAnswer(inv -> {
+            message = (Message) inv.getArguments()[0];
+            latestDelayMs = (long) inv.getArguments()[1];
+            return null;
+        }).when(mockRealtimeScheduler).sendDelayedMessage(any(), anyLong());
+
+        client = makeMdnsServiceTypeClient(featureFlags);
     }
 
-    private MdnsServiceTypeClient makeMdnsServiceTypeClient() {
+    private MdnsServiceTypeClient makeMdnsServiceTypeClient(MdnsFeatureFlags featureFlags) {
         return new MdnsServiceTypeClient(SERVICE_TYPE, mockSocketClient, currentThreadExecutor,
                 mockDecoderClock, socketKey, mockSharedLog, thread.getLooper(), mockDeps,
                 serviceCache, featureFlags);
@@ -1926,9 +1941,7 @@
 
     @Test
     public void testSendQueryWithKnownAnswers() throws Exception {
-        client = new MdnsServiceTypeClient(SERVICE_TYPE, mockSocketClient, currentThreadExecutor,
-                mockDecoderClock, socketKey, mockSharedLog, thread.getLooper(), mockDeps,
-                serviceCache,
+        client = makeMdnsServiceTypeClient(
                 MdnsFeatureFlags.newBuilder().setIsQueryWithKnownAnswerEnabled(true).build());
 
         doCallRealMethod().when(mockDeps).getDatagramPacketsFromMdnsPacket(
@@ -1990,9 +2003,7 @@
 
     @Test
     public void testSendQueryWithSubTypeWithKnownAnswers() throws Exception {
-        client = new MdnsServiceTypeClient(SERVICE_TYPE, mockSocketClient, currentThreadExecutor,
-                mockDecoderClock, socketKey, mockSharedLog, thread.getLooper(), mockDeps,
-                serviceCache,
+        client = makeMdnsServiceTypeClient(
                 MdnsFeatureFlags.newBuilder().setIsQueryWithKnownAnswerEnabled(true).build());
 
         doCallRealMethod().when(mockDeps).getDatagramPacketsFromMdnsPacket(
@@ -2114,6 +2125,73 @@
         assertEquals(9680L, latestDelayMs);
     }
 
+    @Test
+    public void sendQueries_AccurateDelayCallback() {
+        client = makeMdnsServiceTypeClient(
+                MdnsFeatureFlags.newBuilder().setIsAccurateDelayCallbackEnabled(true).build());
+
+        final int numOfQueriesBeforeBackoff = 2;
+        final MdnsSearchOptions searchOptions = MdnsSearchOptions.newBuilder()
+                .addSubtype(SUBTYPE)
+                .setQueryMode(AGGRESSIVE_QUERY_MODE)
+                .setNumOfQueriesBeforeBackoff(numOfQueriesBeforeBackoff)
+                .build();
+        startSendAndReceive(mockListenerOne, searchOptions);
+        verify(mockRealtimeScheduler, times(1)).removeDelayedMessage(EVENT_START_QUERYTASK);
+
+        // Verify that the first query has been sent.
+        verifyAndSendQuery(0 /* index */, 0 /* timeInMs */, true /* expectsUnicastResponse */,
+                true /* multipleSocketDiscovery */, 1 /* scheduledCount */,
+                1 /* sendMessageCount */, true /* useAccurateDelayCallback */);
+
+        // Verify that the second query has been sent
+        verifyAndSendQuery(1 /* index */, 0 /* timeInMs */, false /* expectsUnicastResponse */,
+                true /* multipleSocketDiscovery */, 2 /* scheduledCount */,
+                2 /* sendMessageCount */, true /* useAccurateDelayCallback */);
+
+        // Verify that the third query has been sent
+        verifyAndSendQuery(2 /* index */, TIME_BETWEEN_RETRANSMISSION_QUERIES_IN_BURST_MS,
+                false /* expectsUnicastResponse */, true /* multipleSocketDiscovery */,
+                3 /* scheduledCount */, 3 /* sendMessageCount */,
+                true /* useAccurateDelayCallback */);
+
+        // In backoff mode, the current scheduled task will be canceled and reschedule if the
+        // 0.8 * smallestRemainingTtl is larger than time to next run.
+        long currentTime = TEST_TTL / 2 + TEST_ELAPSED_REALTIME;
+        doReturn(currentTime).when(mockDecoderClock).elapsedRealtime();
+        doReturn(true).when(mockRealtimeScheduler).hasDelayedMessage(EVENT_START_QUERYTASK);
+        processResponse(createResponse(
+                "service-instance-1", "192.0.2.123", 5353,
+                SERVICE_TYPE_LABELS,
+                Collections.emptyMap(), TEST_TTL), socketKey);
+        // Verify that the message removal occurred.
+        verify(mockRealtimeScheduler, times(6)).removeDelayedMessage(EVENT_START_QUERYTASK);
+        assertNotNull(message);
+        verifyAndSendQuery(3 /* index */, (long) (TEST_TTL / 2 * 0.8) /* timeInMs */,
+                true /* expectsUnicastResponse */, true /* multipleSocketDiscovery */,
+                5 /* scheduledCount */, 4 /* sendMessageCount */,
+                true /* useAccurateDelayCallback */);
+
+        // Stop sending packets.
+        stopSendAndReceive(mockListenerOne);
+        verify(mockRealtimeScheduler, times(8)).removeDelayedMessage(EVENT_START_QUERYTASK);
+    }
+
+    @Test
+    public void testTimerFdCloseProperly() {
+        client = makeMdnsServiceTypeClient(
+                MdnsFeatureFlags.newBuilder().setIsAccurateDelayCallbackEnabled(true).build());
+
+        // Start query
+        startSendAndReceive(mockListenerOne, MdnsSearchOptions.newBuilder().build());
+        verify(mockRealtimeScheduler, times(1)).removeDelayedMessage(EVENT_START_QUERYTASK);
+
+        // Stop query and verify the close() method has been called.
+        stopSendAndReceive(mockListenerOne);
+        verify(mockRealtimeScheduler, times(2)).removeDelayedMessage(EVENT_START_QUERYTASK);
+        verify(mockRealtimeScheduler).close();
+    }
+
     private static MdnsServiceInfo matchServiceName(String name) {
         return argThat(info -> info.getServiceInstanceName().equals(name));
     }
@@ -2127,9 +2205,22 @@
 
     private void verifyAndSendQuery(int index, long timeInMs, boolean expectsUnicastResponse,
             boolean multipleSocketDiscovery, int scheduledCount) {
-        // Dispatch the message
-        if (delayMessage != null && realHandler != null) {
-            dispatchMessage();
+        verifyAndSendQuery(index, timeInMs, expectsUnicastResponse,
+                multipleSocketDiscovery, scheduledCount, index + 1 /* sendMessageCount */,
+                false /* useAccurateDelayCallback */);
+    }
+
+    private void verifyAndSendQuery(int index, long timeInMs, boolean expectsUnicastResponse,
+            boolean multipleSocketDiscovery, int scheduledCount, int sendMessageCount,
+            boolean useAccurateDelayCallback) {
+        if (useAccurateDelayCallback && message != null && realHandler != null) {
+            runOnHandler(() -> realHandler.dispatchMessage(message));
+            message = null;
+        } else {
+            // Dispatch the message
+            if (delayMessage != null && realHandler != null) {
+                dispatchMessage();
+            }
         }
         assertEquals(timeInMs, latestDelayMs);
         currentThreadExecutor.getAndClearLastScheduledRunnable().run();
@@ -2152,11 +2243,16 @@
                         eq(socketKey), eq(false));
             }
         }
-        verify(mockDeps, times(index + 1))
+        verify(mockDeps, times(sendMessageCount))
                 .sendMessage(any(Handler.class), any(Message.class));
         // Verify the task has been scheduled.
-        verify(mockDeps, times(scheduledCount))
-                .sendMessageDelayed(any(Handler.class), any(Message.class), anyLong());
+        if (useAccurateDelayCallback) {
+            verify(mockRealtimeScheduler, times(scheduledCount))
+                    .sendDelayedMessage(any(), anyLong());
+        } else {
+            verify(mockDeps, times(scheduledCount))
+                    .sendMessageDelayed(any(Handler.class), any(Message.class), anyLong());
+        }
     }
 
     private static String[] getTestServiceName(String instanceName) {
diff --git a/tests/unit/java/com/android/server/connectivity/mdns/MdnsSocketProviderTest.java b/tests/unit/java/com/android/server/connectivity/mdns/MdnsSocketProviderTest.java
index 1cc9985..f763bae 100644
--- a/tests/unit/java/com/android/server/connectivity/mdns/MdnsSocketProviderTest.java
+++ b/tests/unit/java/com/android/server/connectivity/mdns/MdnsSocketProviderTest.java
@@ -610,6 +610,7 @@
 
     @Test
     public void testSocketCreatedForMulticastInterface() throws Exception {
+        doReturn(true).when(mTestNetworkIfaceWrapper).isPointToPoint();
         doReturn(true).when(mTestNetworkIfaceWrapper).supportsMulticast();
         startMonitoringSockets();
 
@@ -621,18 +622,6 @@
     }
 
     @Test
-    public void testNoSocketCreatedForPTPInterface() throws Exception {
-        doReturn(true).when(mTestNetworkIfaceWrapper).isPointToPoint();
-        startMonitoringSockets();
-
-        final TestSocketCallback testCallback = new TestSocketCallback();
-        runOnHandler(() -> mSocketProvider.requestSocket(TEST_NETWORK, testCallback));
-
-        postNetworkAvailable(TRANSPORT_BLUETOOTH);
-        testCallback.expectedNoCallback();
-    }
-
-    @Test
     public void testNoSocketCreatedForVPNInterface() throws Exception {
         // VPN interfaces generally also have IFF_POINTOPOINT, but even if they don't, they should
         // not be included even with TRANSPORT_WIFI.
diff --git a/tests/unit/java/com/android/server/connectivityservice/CSBpfNetMapsTest.kt b/tests/unit/java/com/android/server/connectivityservice/CSBpfNetMapsTest.kt
index 8155fd0..06cb7ee 100644
--- a/tests/unit/java/com/android/server/connectivityservice/CSBpfNetMapsTest.kt
+++ b/tests/unit/java/com/android/server/connectivityservice/CSBpfNetMapsTest.kt
@@ -21,7 +21,10 @@
 import android.net.ConnectivityManager.RESTRICT_BACKGROUND_STATUS_DISABLED
 import android.net.ConnectivityManager.RESTRICT_BACKGROUND_STATUS_ENABLED
 import android.net.ConnectivityManager.RESTRICT_BACKGROUND_STATUS_WHITELISTED
+import android.net.InetAddresses
+import android.net.LinkProperties
 import android.os.Build
+import android.os.Build.VERSION_CODES
 import androidx.test.filters.SmallTest
 import com.android.testutils.DevSdkIgnoreRule
 import com.android.testutils.DevSdkIgnoreRule.IgnoreAfter
@@ -33,11 +36,32 @@
 import org.junit.runner.RunWith
 import org.mockito.ArgumentMatchers.anyBoolean
 import org.mockito.ArgumentMatchers.anyInt
+import org.mockito.ArgumentMatchers.eq
+import org.mockito.Mockito.atLeastOnce
 import org.mockito.Mockito.doReturn
 import org.mockito.Mockito.inOrder
 import org.mockito.Mockito.never
 import org.mockito.Mockito.verify
 
+internal val LOCAL_DNS = InetAddresses.parseNumericAddress("224.0.1.2")
+internal val NON_LOCAL_DNS = InetAddresses.parseNumericAddress("76.76.75.75")
+
+private const val IFNAME_1 = "wlan1"
+private const val IFNAME_2 = "wlan2"
+private const val PORT_53 = 53
+private const val PROTOCOL_TCP = 6
+private const val PROTOCOL_UDP = 17
+
+private val lpWithNoLocalDns = LinkProperties().apply {
+    addDnsServer(NON_LOCAL_DNS)
+    interfaceName = IFNAME_1
+}
+
+private val lpWithLocalDns = LinkProperties().apply {
+    addDnsServer(LOCAL_DNS)
+    interfaceName = IFNAME_2
+}
+
 @DevSdkIgnoreRunner.MonitorThreadLeak
 @RunWith(DevSdkIgnoreRunner::class)
 @SmallTest
@@ -69,6 +93,81 @@
         }
     }
 
+    @IgnoreUpTo(Build.VERSION_CODES.VANILLA_ICE_CREAM)
+    @Test
+    fun testLocalPrefixesUpdatedInBpfMap() {
+        // Connect Wi-Fi network with non-local dns.
+        val wifiAgent = Agent(nc = defaultNc(), lp = lpWithNoLocalDns)
+        wifiAgent.connect()
+
+        // Verify that block rule is added to BpfMap for local prefixes.
+        verify(bpfNetMaps, atLeastOnce()).addLocalNetAccess(any(), eq(IFNAME_1),
+            any(), eq(0), eq(0), eq(false))
+
+        wifiAgent.disconnect()
+        val cellAgent = Agent(nc = defaultNc(), lp = lpWithLocalDns)
+        cellAgent.connect()
+
+        // Verify that block rule is removed from BpfMap for local prefixes.
+        verify(bpfNetMaps, atLeastOnce()).removeLocalNetAccess(any(), eq(IFNAME_1),
+            any(), eq(0), eq(0))
+
+        cellAgent.disconnect()
+    }
+
+    @IgnoreUpTo(Build.VERSION_CODES.VANILLA_ICE_CREAM)
+    @Test
+    fun testLocalDnsNotUpdatedInBpfMap() {
+        // Connect Wi-Fi network with non-local dns.
+        val wifiAgent = Agent(nc = defaultNc(), lp = lpWithNoLocalDns)
+        wifiAgent.connect()
+
+        // Verify that No allow rule is added to BpfMap since there is no local dns.
+        verify(bpfNetMaps, never()).addLocalNetAccess(any(), any(), any(), any(), any(),
+            eq(true))
+
+        wifiAgent.disconnect()
+        val cellAgent = Agent(nc = defaultNc(), lp = lpWithLocalDns)
+        cellAgent.connect()
+
+        // Verify that No allow rule from port 53 is removed on network change
+        // because no dns was added
+        verify(bpfNetMaps, never()).removeLocalNetAccess(eq(192), eq(IFNAME_1),
+            eq(NON_LOCAL_DNS), any(), eq(PORT_53))
+
+        cellAgent.disconnect()
+    }
+
+    @IgnoreUpTo(Build.VERSION_CODES.VANILLA_ICE_CREAM)
+    @Test
+    fun testLocalDnsUpdatedInBpfMap() {
+        // Connect Wi-Fi network with one local Dns.
+        val wifiAgent = Agent(nc = defaultNc(), lp = lpWithLocalDns)
+        wifiAgent.connect()
+
+        // Verify that allow rule is added to BpfMap for local dns at port 53,
+        // for TCP(=6) protocol
+        verify(bpfNetMaps, atLeastOnce()).addLocalNetAccess(eq(192), eq(IFNAME_2),
+            eq(LOCAL_DNS), eq(PROTOCOL_TCP), eq(PORT_53), eq(true))
+        // And for UDP(=17) protocol
+        verify(bpfNetMaps, atLeastOnce()).addLocalNetAccess(eq(192), eq(IFNAME_2),
+            eq(LOCAL_DNS), eq(PROTOCOL_UDP), eq(PORT_53), eq(true))
+
+        wifiAgent.disconnect()
+        val cellAgent = Agent(nc = defaultNc(), lp = lpWithNoLocalDns)
+        cellAgent.connect()
+
+        // Verify that allow rule is removed for local dns on network change,
+        // for TCP(=6) protocol
+        verify(bpfNetMaps, atLeastOnce()).removeLocalNetAccess(eq(192), eq(IFNAME_2),
+            eq(LOCAL_DNS), eq(PROTOCOL_TCP), eq(PORT_53))
+        // And for UDP(=17) protocol
+        verify(bpfNetMaps, atLeastOnce()).removeLocalNetAccess(eq(192), eq(IFNAME_2),
+            eq(LOCAL_DNS), eq(PROTOCOL_UDP), eq(PORT_53))
+
+        cellAgent.disconnect()
+    }
+
     private fun mockDataSaverStatus(status: Int) {
         doReturn(status).`when`(context.networkPolicyManager).getRestrictBackgroundStatus(anyInt())
         // While the production code dispatches the intent on the handler thread,
diff --git a/tests/unit/java/com/android/server/connectivityservice/CSL2capProviderTest.kt b/tests/unit/java/com/android/server/connectivityservice/CSL2capProviderTest.kt
new file mode 100644
index 0000000..babcba9
--- /dev/null
+++ b/tests/unit/java/com/android/server/connectivityservice/CSL2capProviderTest.kt
@@ -0,0 +1,397 @@
+/*
+ * Copyright (C) 2024 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.server
+
+import android.bluetooth.BluetoothAdapter
+import android.bluetooth.BluetoothDevice
+import android.bluetooth.BluetoothServerSocket
+import android.bluetooth.BluetoothSocket
+import android.net.INetworkMonitor
+import android.net.INetworkMonitorCallbacks
+import android.net.IpPrefix
+import android.net.L2capNetworkSpecifier
+import android.net.L2capNetworkSpecifier.HEADER_COMPRESSION_6LOWPAN
+import android.net.L2capNetworkSpecifier.HEADER_COMPRESSION_NONE
+import android.net.L2capNetworkSpecifier.ROLE_CLIENT
+import android.net.L2capNetworkSpecifier.ROLE_SERVER
+import android.net.LinkAddress
+import android.net.LinkProperties
+import android.net.MacAddress
+import android.net.NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED
+import android.net.NetworkCapabilities.NET_CAPABILITY_TRUSTED
+import android.net.NetworkCapabilities.TRANSPORT_BLUETOOTH
+import android.net.NetworkRequest
+import android.net.NetworkSpecifier
+import android.net.RouteInfo
+import android.os.Build
+import android.os.HandlerThread
+import android.os.ParcelFileDescriptor
+import com.android.server.net.L2capNetwork.L2capIpClient
+import com.android.server.net.L2capPacketForwarder
+import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo
+import com.android.testutils.DevSdkIgnoreRunner
+import com.android.testutils.RecorderCallback.CallbackEntry.Reserved
+import com.android.testutils.RecorderCallback.CallbackEntry.Unavailable
+import com.android.testutils.TestableNetworkCallback
+import com.android.testutils.anyNetwork
+import com.android.testutils.waitForIdle
+import java.io.IOException
+import java.util.Optional
+import java.util.concurrent.LinkedBlockingQueue
+import kotlin.test.assertEquals
+import kotlin.test.assertFalse
+import kotlin.test.assertNull
+import org.junit.After
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.mockito.ArgumentMatchers.eq
+import org.mockito.ArgumentMatchers.isNull
+import org.mockito.Mockito.doAnswer
+import org.mockito.Mockito.doReturn
+import org.mockito.Mockito.doThrow
+import org.mockito.Mockito.mock
+import org.mockito.Mockito.verify
+
+private const val PSM = 0x85
+private val REMOTE_MAC = byteArrayOf(1, 2, 3, 4, 5, 6)
+private val REQUEST = NetworkRequest.Builder()
+        .addTransportType(TRANSPORT_BLUETOOTH)
+        .removeCapability(NET_CAPABILITY_TRUSTED)
+        .removeCapability(NET_CAPABILITY_NOT_RESTRICTED)
+        .build()
+
+@RunWith(DevSdkIgnoreRunner::class)
+@IgnoreUpTo(Build.VERSION_CODES.R)
+@DevSdkIgnoreRunner.MonitorThreadLeak
+class CSL2capProviderTest : CSTest() {
+    private val networkMonitor = mock<INetworkMonitor>()
+
+    private val btAdapter = mock<BluetoothAdapter>()
+    private val btDevice = mock<BluetoothDevice>()
+    private val btServerSocket = mock<BluetoothServerSocket>()
+    private val btSocket = mock<BluetoothSocket>()
+    private val tunInterface = mock<ParcelFileDescriptor>()
+    private val l2capIpClient = mock<L2capIpClient>()
+    private val packetForwarder = mock<L2capPacketForwarder>()
+    private val providerDeps = mock<L2capNetworkProvider.Dependencies>()
+
+    // BlockingQueue does not support put(null) operations, as null is used as an internal sentinel
+    // value. Therefore, use Optional<BluetoothSocket> where an empty optional signals the
+    // BluetoothServerSocket#close() operation.
+    private val acceptQueue = LinkedBlockingQueue<Optional<BluetoothSocket>>()
+
+    private val handlerThread = HandlerThread("CSL2capProviderTest thread").apply { start() }
+    private val registeredCallbacks = ArrayList<TestableNetworkCallback>()
+
+    // Requires Dependencies mock to be setup before creation.
+    private lateinit var provider: L2capNetworkProvider
+
+    @Before
+    fun innerSetUp() {
+        doReturn(btAdapter).`when`(bluetoothManager).getAdapter()
+        doReturn(btServerSocket).`when`(btAdapter).listenUsingInsecureL2capChannel()
+        doReturn(PSM).`when`(btServerSocket).getPsm()
+        doReturn(btDevice).`when`(btAdapter).getRemoteDevice(eq(REMOTE_MAC))
+        doReturn(btSocket).`when`(btDevice).createInsecureL2capChannel(eq(PSM))
+
+        doAnswer {
+            val sock = acceptQueue.take()
+            if (sock == null || !sock.isPresent()) throw IOException()
+            sock.get()
+        }.`when`(btServerSocket).accept()
+
+        doAnswer {
+            acceptQueue.put(Optional.empty())
+        }.`when`(btServerSocket).close()
+
+        doReturn(handlerThread).`when`(providerDeps).getHandlerThread()
+        doReturn(tunInterface).`when`(providerDeps).createTunInterface(any())
+        doReturn(packetForwarder).`when`(providerDeps)
+                .createL2capPacketForwarder(any(), any(), any(), any(), any())
+        doReturn(l2capIpClient).`when`(providerDeps).createL2capIpClient(any(), any(), any())
+
+        val lp = LinkProperties()
+        val ifname = "l2cap-tun0"
+        lp.setInterfaceName(ifname)
+        lp.addLinkAddress(LinkAddress("fe80::1/64"))
+        lp.addRoute(RouteInfo(IpPrefix("fe80::/64"), null /* nextHop */, ifname))
+        doReturn(lp).`when`(l2capIpClient).start()
+
+        // Note: In order to properly register a NetworkAgent, a NetworkMonitor must be created for
+        // the agent. CSAgentWrapper already does some of this, but requires adding additional
+        // Dependencies to the production code. Create a mocked NM inside this test instead.
+        doAnswer { i ->
+            val cb = i.arguments[2] as INetworkMonitorCallbacks
+            cb.onNetworkMonitorCreated(networkMonitor)
+        }.`when`(networkStack).makeNetworkMonitor(
+                any() /* network */,
+                isNull() /* name */,
+                any() /* callbacks */
+        )
+
+        provider = L2capNetworkProvider(providerDeps, context)
+        provider.start()
+    }
+
+    @After
+    fun innerTearDown() {
+        // Unregistering a callback which has previously been unregistered by virtue of receiving
+        // onUnavailable is a noop.
+        registeredCallbacks.forEach { cm.unregisterNetworkCallback(it) }
+        // Wait for CS handler idle, meaning the unregisterNetworkCallback has been processed and
+        // L2capNetworkProvider has been notified.
+        waitForIdle()
+
+        // While quitSafely() effectively waits for idle, it is not enough, because the tear down
+        // path itself posts on the handler thread. This means that waitForIdle() needs to run
+        // twice. The first time, to ensure all active threads have been joined, and the second time
+        // to run all associated clean up actions.
+        handlerThread.waitForIdle(HANDLER_TIMEOUT_MS)
+        handlerThread.quitSafely()
+        handlerThread.join()
+    }
+
+    private fun reserveNetwork(nr: NetworkRequest) = TestableNetworkCallback().also {
+        cm.reserveNetwork(nr, csHandler, it)
+        registeredCallbacks.add(it)
+    }
+
+    private fun requestNetwork(nr: NetworkRequest) = TestableNetworkCallback().also {
+        cm.requestNetwork(nr, it, csHandler)
+        registeredCallbacks.add(it)
+    }
+
+    private fun NetworkRequest.copyWithSpecifier(specifier: NetworkSpecifier): NetworkRequest {
+        // Note: NetworkRequest.Builder(NetworkRequest) *does not* perform a defensive copy but
+        // changes the underlying request.
+        return NetworkRequest.Builder(NetworkRequest(this))
+                .setNetworkSpecifier(specifier)
+                .build()
+    }
+
+    @Test
+    fun testReservation() {
+        val l2capServerSpecifier = L2capNetworkSpecifier.Builder()
+                .setRole(ROLE_SERVER)
+                .setHeaderCompression(HEADER_COMPRESSION_6LOWPAN)
+                .build()
+        val l2capReservation = REQUEST.copyWithSpecifier(l2capServerSpecifier)
+        val reservationCb = reserveNetwork(l2capReservation)
+
+        val reservedCaps = reservationCb.expect<Reserved>().caps
+        val reservedSpec = reservedCaps.networkSpecifier as L2capNetworkSpecifier
+
+        assertEquals(PSM, reservedSpec.getPsm())
+        assertEquals(HEADER_COMPRESSION_6LOWPAN, reservedSpec.headerCompression)
+        assertNull(reservedSpec.remoteAddress)
+
+        reservationCb.assertNoCallback()
+    }
+
+    @Test
+    fun testBlanketOffer_reservationWithoutSpecifier() {
+        reserveNetwork(REQUEST).assertNoCallback()
+    }
+
+    @Test
+    fun testBlanketOffer_reservationWithCorrectSpecifier() {
+        var specifier = L2capNetworkSpecifier.Builder()
+                .setRole(ROLE_SERVER)
+                .setHeaderCompression(HEADER_COMPRESSION_6LOWPAN)
+                .build()
+        var nr = REQUEST.copyWithSpecifier(specifier)
+        reserveNetwork(nr).expect<Reserved>()
+
+        specifier = L2capNetworkSpecifier.Builder()
+                .setRole(ROLE_SERVER)
+                .setHeaderCompression(HEADER_COMPRESSION_NONE)
+                .build()
+        nr = REQUEST.copyWithSpecifier(specifier)
+        reserveNetwork(nr).expect<Reserved>()
+    }
+
+    @Test
+    fun testBlanketOffer_reservationWithIncorrectSpecifier() {
+        var specifier = L2capNetworkSpecifier.Builder().build()
+        var nr = REQUEST.copyWithSpecifier(specifier)
+        reserveNetwork(nr).assertNoCallback()
+
+        specifier = L2capNetworkSpecifier.Builder()
+                .setRole(ROLE_SERVER)
+                .build()
+        nr = REQUEST.copyWithSpecifier(specifier)
+        reserveNetwork(nr).assertNoCallback()
+
+        specifier = L2capNetworkSpecifier.Builder()
+                .setRole(ROLE_SERVER)
+                .setHeaderCompression(HEADER_COMPRESSION_NONE)
+                .setPsm(0x81)
+                .build()
+        nr = REQUEST.copyWithSpecifier(specifier)
+        reserveNetwork(nr).assertNoCallback()
+
+        specifier = L2capNetworkSpecifier.Builder()
+                .setHeaderCompression(HEADER_COMPRESSION_NONE)
+                .build()
+        nr = REQUEST.copyWithSpecifier(specifier)
+        reserveNetwork(nr).assertNoCallback()
+    }
+
+    @Test
+    fun testBluetoothException_listenUsingInsecureL2capChannelThrows() {
+        doThrow(IOException()).`when`(btAdapter).listenUsingInsecureL2capChannel()
+        var specifier = L2capNetworkSpecifier.Builder()
+                .setRole(ROLE_SERVER)
+                .setHeaderCompression(HEADER_COMPRESSION_6LOWPAN)
+                .build()
+        var nr = REQUEST.copyWithSpecifier(specifier)
+        reserveNetwork(nr).expect<Unavailable>()
+
+        doReturn(btServerSocket).`when`(btAdapter).listenUsingInsecureL2capChannel()
+        reserveNetwork(nr).expect<Reserved>()
+    }
+
+    @Test
+    fun testBluetoothException_acceptThrows() {
+        doThrow(IOException()).`when`(btServerSocket).accept()
+        var specifier = L2capNetworkSpecifier.Builder()
+                .setRole(ROLE_SERVER)
+                .setHeaderCompression(HEADER_COMPRESSION_6LOWPAN)
+                .build()
+        var nr = REQUEST.copyWithSpecifier(specifier)
+        val cb = reserveNetwork(nr)
+        cb.expect<Reserved>()
+        cb.expect<Unavailable>()
+
+        // BluetoothServerSocket#close() puts Optional.empty() on the acceptQueue.
+        acceptQueue.clear()
+        doAnswer {
+            val sock = acceptQueue.take()
+            assertFalse(sock.isPresent())
+            throw IOException() // to indicate the socket was closed.
+        }.`when`(btServerSocket).accept()
+        val cb2 = reserveNetwork(nr)
+        cb2.expect<Reserved>()
+        cb2.assertNoCallback()
+    }
+
+    @Test
+    fun testServerNetwork() {
+        val specifier = L2capNetworkSpecifier.Builder()
+                .setRole(ROLE_SERVER)
+                .setHeaderCompression(HEADER_COMPRESSION_6LOWPAN)
+                .build()
+        val nr = REQUEST.copyWithSpecifier(specifier)
+        val cb = reserveNetwork(nr)
+        cb.expect<Reserved>()
+
+        // Unblock BluetoothServerSocket#accept()
+        doReturn(true).`when`(btSocket).isConnected()
+        acceptQueue.put(Optional.of(btSocket))
+
+        cb.expectAvailableCallbacks(anyNetwork(), validated = false)
+        cb.assertNoCallback()
+        // Verify that packet forwarding was started.
+        // TODO: stop mocking L2capPacketForwarder.
+        verify(providerDeps).createL2capPacketForwarder(any(), any(), any(), any(), any())
+    }
+
+    @Test
+    fun testBluetoothException_createInsecureL2capChannelThrows() {
+        doThrow(IOException()).`when`(btDevice).createInsecureL2capChannel(any())
+
+        val specifier = L2capNetworkSpecifier.Builder()
+                .setRole(ROLE_CLIENT)
+                .setHeaderCompression(HEADER_COMPRESSION_NONE)
+                .setRemoteAddress(MacAddress.fromBytes(REMOTE_MAC))
+                .setPsm(PSM)
+                .build()
+        val nr = REQUEST.copyWithSpecifier(specifier)
+        val cb = requestNetwork(nr)
+
+        cb.expect<Unavailable>()
+    }
+
+    @Test
+    fun testBluetoothException_bluetoothSocketConnectThrows() {
+        doThrow(IOException()).`when`(btSocket).connect()
+
+        val specifier = L2capNetworkSpecifier.Builder()
+                .setRole(ROLE_CLIENT)
+                .setHeaderCompression(HEADER_COMPRESSION_NONE)
+                .setRemoteAddress(MacAddress.fromBytes(REMOTE_MAC))
+                .setPsm(PSM)
+                .build()
+        val nr = REQUEST.copyWithSpecifier(specifier)
+        val cb = requestNetwork(nr)
+
+        cb.expect<Unavailable>()
+    }
+
+    @Test
+    fun testClientNetwork() {
+        val specifier = L2capNetworkSpecifier.Builder()
+                .setRole(ROLE_CLIENT)
+                .setHeaderCompression(HEADER_COMPRESSION_NONE)
+                .setRemoteAddress(MacAddress.fromBytes(REMOTE_MAC))
+                .setPsm(PSM)
+                .build()
+        val nr = REQUEST.copyWithSpecifier(specifier)
+        val cb = requestNetwork(nr)
+        cb.expectAvailableCallbacks(anyNetwork(), validated = false)
+    }
+
+    @Test
+    fun testClientNetwork_headerCompressionMismatch() {
+        var specifier = L2capNetworkSpecifier.Builder()
+                .setRole(ROLE_CLIENT)
+                .setHeaderCompression(HEADER_COMPRESSION_NONE)
+                .setRemoteAddress(MacAddress.fromBytes(REMOTE_MAC))
+                .setPsm(PSM)
+                .build()
+        var nr = REQUEST.copyWithSpecifier(specifier)
+        val cb = requestNetwork(nr)
+        cb.expectAvailableCallbacks(anyNetwork(), validated = false)
+
+        specifier = L2capNetworkSpecifier.Builder()
+                .setRole(ROLE_CLIENT)
+                .setHeaderCompression(HEADER_COMPRESSION_6LOWPAN)
+                .setRemoteAddress(MacAddress.fromBytes(REMOTE_MAC))
+                .setPsm(PSM)
+                .build()
+        nr = REQUEST.copyWithSpecifier(specifier)
+        val cb2 = requestNetwork(nr)
+        cb2.expect<Unavailable>()
+    }
+
+    @Test
+    fun testClientNetwork_multipleRequests() {
+        val specifier = L2capNetworkSpecifier.Builder()
+                .setRole(ROLE_CLIENT)
+                .setHeaderCompression(HEADER_COMPRESSION_NONE)
+                .setRemoteAddress(MacAddress.fromBytes(REMOTE_MAC))
+                .setPsm(PSM)
+                .build()
+        val nr = REQUEST.copyWithSpecifier(specifier)
+        val cb = requestNetwork(nr)
+        cb.expectAvailableCallbacks(anyNetwork(), validated = false)
+
+        val cb2 = requestNetwork(nr)
+        cb2.expectAvailableCallbacks(anyNetwork(), validated = false)
+    }
+}
diff --git a/tests/unit/java/com/android/server/connectivityservice/CSLocalAgentTests.kt b/tests/unit/java/com/android/server/connectivityservice/CSLocalAgentTests.kt
index 83fff87..3583f84 100644
--- a/tests/unit/java/com/android/server/connectivityservice/CSLocalAgentTests.kt
+++ b/tests/unit/java/com/android/server/connectivityservice/CSLocalAgentTests.kt
@@ -54,9 +54,7 @@
 import org.mockito.Mockito.inOrder
 import org.mockito.Mockito.never
 import org.mockito.Mockito.timeout
-import org.mockito.Mockito.times
 import org.mockito.Mockito.verify
-import org.mockito.Mockito.verifyNoMoreInteractions
 
 private const val TIMEOUT_MS = 200L
 private const val MEDIUM_TIMEOUT_MS = 1_000L
diff --git a/tests/unit/java/com/android/server/connectivityservice/CSLocalNetworkProtectionTest.kt b/tests/unit/java/com/android/server/connectivityservice/CSLocalNetworkProtectionTest.kt
new file mode 100644
index 0000000..84c9835
--- /dev/null
+++ b/tests/unit/java/com/android/server/connectivityservice/CSLocalNetworkProtectionTest.kt
@@ -0,0 +1,590 @@
+/*
+ * Copyright (C) 2023 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.server
+
+import android.net.InetAddresses
+import android.net.IpPrefix
+import android.net.LinkAddress
+import android.net.LinkProperties
+import android.net.NetworkCapabilities
+import android.net.NetworkCapabilities.NET_CAPABILITY_INTERNET
+import android.net.NetworkCapabilities.NET_CAPABILITY_NOT_VCN_MANAGED
+import android.net.NetworkCapabilities.NET_CAPABILITY_NOT_VPN
+import android.net.NetworkCapabilities.TRANSPORT_VPN
+import android.net.NetworkCapabilities.TRANSPORT_WIFI
+import android.net.NetworkRequest
+import android.os.Build
+import androidx.test.filters.SmallTest
+import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo
+import com.android.testutils.DevSdkIgnoreRunner
+import com.android.testutils.RecorderCallback.CallbackEntry.LinkPropertiesChanged
+import com.android.testutils.RecorderCallback.CallbackEntry.Lost
+import com.android.testutils.TestableNetworkCallback
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.mockito.ArgumentMatchers.eq
+import org.mockito.Mockito.never
+import org.mockito.Mockito.times
+import org.mockito.Mockito.verify
+
+private const val LONG_TIMEOUT_MS = 5_000
+private const val PREFIX_LENGTH_IPV4 = 32 + 96
+private const val PREFIX_LENGTH_IPV6 = 32
+private const val WIFI_IFNAME = "wlan0"
+private const val WIFI_IFNAME_2 = "wlan1"
+private const val WIFI_IFNAME_3 = "wlan2"
+
+private val wifiNc = NetworkCapabilities.Builder()
+        .addTransportType(TRANSPORT_WIFI)
+        .addCapability(NET_CAPABILITY_INTERNET)
+        .addCapability(NET_CAPABILITY_NOT_VCN_MANAGED)
+        .build()
+
+private fun lp(iface: String, vararg linkAddresses: LinkAddress) = LinkProperties().apply {
+    interfaceName = iface
+    for (linkAddress in linkAddresses) {
+        addLinkAddress(linkAddress)
+    }
+}
+
+private fun nr(transport: Int) = NetworkRequest.Builder()
+        .clearCapabilities()
+        .addTransportType(transport).apply {
+            if (transport != TRANSPORT_VPN) {
+                addCapability(NET_CAPABILITY_NOT_VPN)
+            }
+        }.build()
+
+@DevSdkIgnoreRunner.MonitorThreadLeak
+@RunWith(DevSdkIgnoreRunner::class)
+@SmallTest
+@IgnoreUpTo(Build.VERSION_CODES.VANILLA_ICE_CREAM)
+class CSLocalNetworkProtectionTest : CSTest() {
+    private val LOCAL_IPV6_IP_ADDRESS_PREFIX = IpPrefix("fe80::1cf1:35ff:fe8c:db87/64")
+    private val LOCAL_IPV6_LINK_ADDRESS = LinkAddress(
+        LOCAL_IPV6_IP_ADDRESS_PREFIX.getAddress(),
+        LOCAL_IPV6_IP_ADDRESS_PREFIX.getPrefixLength()
+    )
+
+    private val LOCAL_IPV6_IP_ADDRESS_2_PREFIX =
+            IpPrefix("2601:19b:67f:e220:1cf1:35ff:fe8c:db87/64")
+    private val LOCAL_IPV6_LINK_ADDRESS_2 = LinkAddress(
+            LOCAL_IPV6_IP_ADDRESS_2_PREFIX.getAddress(),
+            LOCAL_IPV6_IP_ADDRESS_2_PREFIX.getPrefixLength()
+    )
+
+    private val LOCAL_IPV6_IP_ADDRESS_3_PREFIX =
+            IpPrefix("fe80::/10")
+    private val LOCAL_IPV6_LINK_ADDRESS_3 = LinkAddress(
+            LOCAL_IPV6_IP_ADDRESS_3_PREFIX.getAddress(),
+            LOCAL_IPV6_IP_ADDRESS_3_PREFIX.getPrefixLength()
+    )
+
+    private val LOCAL_IPV4_IP_ADDRESS_PREFIX_1 = IpPrefix("10.0.0.184/24")
+    private val LOCAL_IPV4_LINK_ADDRRESS_1 =
+        LinkAddress(
+            LOCAL_IPV4_IP_ADDRESS_PREFIX_1.getAddress(),
+            LOCAL_IPV4_IP_ADDRESS_PREFIX_1.getPrefixLength()
+        )
+
+    private val LOCAL_IPV4_IP_ADDRESS_PREFIX_2 = IpPrefix("10.0.255.184/24")
+    private val LOCAL_IPV4_LINK_ADDRRESS_2 =
+        LinkAddress(
+            LOCAL_IPV4_IP_ADDRESS_PREFIX_2.getAddress(),
+            LOCAL_IPV4_IP_ADDRESS_PREFIX_2.getPrefixLength()
+        )
+
+    @Test
+    fun testNetworkWithIPv6LocalAddress_AddressAddedToBpfMap() {
+        val nr = nr(TRANSPORT_WIFI)
+        val cb = TestableNetworkCallback()
+        cm.requestNetwork(nr, cb)
+
+        // Connecting to network with IPv6 local address in LinkProperties
+        val wifiLp = lp(WIFI_IFNAME, LOCAL_IPV6_LINK_ADDRESS)
+        val wifiAgent = Agent(nc = wifiNc, lp = wifiLp)
+        wifiAgent.connect()
+        cb.expectAvailableCallbacks(wifiAgent.network, validated = false)
+
+        // Multicast and Broadcast address should always be populated in local_net_access map
+        verifyPopulationOfMulticastAndBroadcastAddress()
+        // Verifying IPv6 address should be populated in local_net_access map
+        verify(bpfNetMaps).addLocalNetAccess(
+            eq(PREFIX_LENGTH_IPV6 + LOCAL_IPV6_IP_ADDRESS_PREFIX.getPrefixLength()),
+            eq(WIFI_IFNAME),
+            eq(LOCAL_IPV6_IP_ADDRESS_PREFIX.getAddress()),
+            eq(0),
+            eq(0),
+            eq(false)
+        )
+    }
+
+    @Test
+    fun testNetworkWithIPv4LocalAddress_AddressAddedToBpfMap() {
+        val nr = nr(TRANSPORT_WIFI)
+        val cb = TestableNetworkCallback()
+        cm.requestNetwork(nr, cb)
+
+        val wifiLp = lp(WIFI_IFNAME, LOCAL_IPV4_LINK_ADDRRESS_1)
+        val wifiAgent = Agent(nc = wifiNc, lp = wifiLp)
+        wifiAgent.connect()
+        cb.expectAvailableCallbacks(wifiAgent.network, validated = false)
+
+        // Multicast and Broadcast address should always be populated in local_net_access map
+        verifyPopulationOfMulticastAndBroadcastAddress()
+
+        // Verifying IPv4 matching prefix(10.0.0.0/8) should be populated in local_net_access map
+        verify(bpfNetMaps).addLocalNetAccess(
+            eq(PREFIX_LENGTH_IPV4 + 8),
+            eq(WIFI_IFNAME),
+            eq(InetAddresses.parseNumericAddress("10.0.0.0")),
+            eq(0),
+            eq(0),
+            eq(false)
+        )
+    }
+
+    @Test
+    fun testChangeLinkPropertiesWithDifferentLinkAddresses_AddressReplacedInBpfMap() {
+        val nr = nr(TRANSPORT_WIFI)
+        val cb = TestableNetworkCallback()
+        cm.requestNetwork(nr, cb)
+
+        val wifiLp = lp(WIFI_IFNAME, LOCAL_IPV6_LINK_ADDRESS)
+        val wifiAgent = Agent(nc = wifiNc, lp = wifiLp)
+        wifiAgent.connect()
+        cb.expectAvailableCallbacks(wifiAgent.network, validated = false)
+
+        // Multicast and Broadcast address should always be populated in local_net_access map
+        verifyPopulationOfMulticastAndBroadcastAddress()
+        // Verifying IPv6 address should be populated in local_net_access map
+        verify(bpfNetMaps).addLocalNetAccess(
+            eq(PREFIX_LENGTH_IPV6 + LOCAL_IPV6_IP_ADDRESS_PREFIX.getPrefixLength()),
+            eq(WIFI_IFNAME),
+            eq(LOCAL_IPV6_IP_ADDRESS_PREFIX.getAddress()),
+            eq(0),
+            eq(0),
+            eq(false)
+        )
+
+        // Updating Link Property from IPv6 in Link Address to IPv4 in Link Address
+        val wifiLp2 = lp(WIFI_IFNAME, LOCAL_IPV4_LINK_ADDRRESS_1)
+        wifiAgent.sendLinkProperties(wifiLp2)
+        cb.expect<LinkPropertiesChanged>(wifiAgent.network)
+
+        // Verifying IPv4 matching prefix(10.0.0.0/8) should be populated in local_net_access map
+        verify(bpfNetMaps).addLocalNetAccess(
+            eq(PREFIX_LENGTH_IPV4 + 8),
+            eq(WIFI_IFNAME),
+            eq(InetAddresses.parseNumericAddress("10.0.0.0")),
+            eq(0),
+            eq(0),
+            eq(false)
+        )
+        // Verifying IPv6 address should be removed from local_net_access map
+        verify(bpfNetMaps).removeLocalNetAccess(
+            eq(PREFIX_LENGTH_IPV6 + LOCAL_IPV6_IP_ADDRESS_PREFIX.getPrefixLength()),
+            eq(WIFI_IFNAME),
+            eq(LOCAL_IPV6_IP_ADDRESS_PREFIX.getAddress()),
+            eq(0),
+            eq(0)
+        )
+    }
+
+    @Test
+    fun testAddingThenRemovingStackedLinkProperties_AddressAddedThenRemovedInBpfMap() {
+        val nr = nr(TRANSPORT_WIFI)
+        val cb = TestableNetworkCallback()
+        cm.requestNetwork(nr, cb)
+
+        val wifiLp = lp(WIFI_IFNAME, LOCAL_IPV6_LINK_ADDRESS)
+        val wifiLp2 = lp(WIFI_IFNAME_2, LOCAL_IPV4_LINK_ADDRRESS_1)
+        // Adding stacked link
+        wifiLp.addStackedLink(wifiLp2)
+        val wifiAgent = Agent(nc = wifiNc, lp = wifiLp)
+        wifiAgent.connect()
+        cb.expectAvailableCallbacks(wifiAgent.network, validated = false)
+
+        // Multicast and Broadcast address should always be populated in local_net_access map
+        verifyPopulationOfMulticastAndBroadcastAddress()
+        // Verifying IPv6 address should be populated in local_net_access map
+        verify(bpfNetMaps).addLocalNetAccess(
+                eq(PREFIX_LENGTH_IPV6 + LOCAL_IPV6_IP_ADDRESS_PREFIX.getPrefixLength()),
+                eq(WIFI_IFNAME),
+                eq(LOCAL_IPV6_IP_ADDRESS_PREFIX.getAddress()),
+                eq(0),
+                eq(0),
+                eq(false)
+        )
+
+        // Multicast and Broadcast address should always be populated on stacked link
+        // in local_net_access map
+        verifyPopulationOfMulticastAndBroadcastAddress(WIFI_IFNAME_2)
+        // Verifying IPv4 matching prefix(10.0.0.0/8) should be populated as part of stacked link
+        // in local_net_access map
+        verify(bpfNetMaps).addLocalNetAccess(
+                eq(PREFIX_LENGTH_IPV4 + 8),
+                eq(WIFI_IFNAME_2),
+                eq(InetAddresses.parseNumericAddress("10.0.0.0")),
+                eq(0),
+                eq(0),
+                eq(false)
+        )
+        // As both addresses are in stacked links, so no address should be removed from the map.
+        verify(bpfNetMaps, never()).removeLocalNetAccess(any(), any(), any(), any(), any())
+
+        // replacing link properties without stacked links
+        val wifiLp_3 = lp(WIFI_IFNAME, LOCAL_IPV6_LINK_ADDRESS)
+        wifiAgent.sendLinkProperties(wifiLp_3)
+        cb.expect<LinkPropertiesChanged>(wifiAgent.network)
+
+        // As both stacked links is removed, 10.0.0.0/8 should be removed from local_net_access map.
+        verify(bpfNetMaps).removeLocalNetAccess(
+                eq(PREFIX_LENGTH_IPV4 + 8),
+                eq(WIFI_IFNAME_2),
+                eq(InetAddresses.parseNumericAddress("10.0.0.0")),
+                eq(0),
+                eq(0)
+        )
+    }
+
+    @Test
+    fun testChangeStackedLinkProperties_AddressReplacedBpfMap() {
+        val nr = nr(TRANSPORT_WIFI)
+        val cb = TestableNetworkCallback()
+        cm.requestNetwork(nr, cb)
+
+        val wifiLp = lp(WIFI_IFNAME, LOCAL_IPV6_LINK_ADDRESS)
+        val wifiLp2 = lp(WIFI_IFNAME_2, LOCAL_IPV4_LINK_ADDRRESS_1)
+        // populating stacked link
+        wifiLp.addStackedLink(wifiLp2)
+        val wifiAgent = Agent(nc = wifiNc, lp = wifiLp)
+        wifiAgent.connect()
+        cb.expectAvailableCallbacks(wifiAgent.network, validated = false)
+
+        // Multicast and Broadcast address should always be populated in local_net_access map
+        verifyPopulationOfMulticastAndBroadcastAddress()
+        // Verifying IPv6 address should be populated in local_net_access map
+        verify(bpfNetMaps).addLocalNetAccess(
+                eq(PREFIX_LENGTH_IPV6 + LOCAL_IPV6_IP_ADDRESS_PREFIX.getPrefixLength()),
+                eq(WIFI_IFNAME),
+                eq(LOCAL_IPV6_IP_ADDRESS_PREFIX.getAddress()),
+                eq(0),
+                eq(0),
+                eq(false)
+        )
+
+        // Multicast and Broadcast address should always be populated on stacked link
+        // in local_net_access map
+        verifyPopulationOfMulticastAndBroadcastAddress(WIFI_IFNAME_2)
+        // Verifying IPv4 matching prefix(10.0.0.0/8) should be populated as part of stacked link
+        // in local_net_access map
+        verify(bpfNetMaps).addLocalNetAccess(
+                eq(PREFIX_LENGTH_IPV4 + 8),
+                eq(WIFI_IFNAME_2),
+                eq(InetAddresses.parseNumericAddress("10.0.0.0")),
+                eq(0),
+                eq(0),
+                eq(false)
+        )
+        // As both addresses are in stacked links, so no address should be removed from the map.
+        verify(bpfNetMaps, never()).removeLocalNetAccess(any(), any(), any(), any(), any())
+
+        // replacing link properties multiple stacked links
+        val wifiLp_3 = lp(WIFI_IFNAME, LOCAL_IPV6_LINK_ADDRESS_2)
+        val wifiLp_4 = lp(WIFI_IFNAME_2, LOCAL_IPV4_LINK_ADDRRESS_2)
+        val wifiLp_5 = lp(WIFI_IFNAME_3, LOCAL_IPV6_LINK_ADDRESS_3)
+        wifiLp_3.addStackedLink(wifiLp_4)
+        wifiLp_3.addStackedLink(wifiLp_5)
+        wifiAgent.sendLinkProperties(wifiLp_3)
+        cb.expect<LinkPropertiesChanged>(wifiAgent.network)
+
+        // Multicast and Broadcast address should always be populated on stacked link
+        // in local_net_access map
+        verifyPopulationOfMulticastAndBroadcastAddress(WIFI_IFNAME_3)
+        // Verifying new base IPv6 address should be populated in local_net_access map
+        verify(bpfNetMaps).addLocalNetAccess(
+                eq(PREFIX_LENGTH_IPV6 + LOCAL_IPV6_IP_ADDRESS_2_PREFIX.getPrefixLength()),
+                eq(WIFI_IFNAME),
+                eq(LOCAL_IPV6_IP_ADDRESS_2_PREFIX.getAddress()),
+                eq(0),
+                eq(0),
+                eq(false)
+        )
+        // Verifying IPv4 matching prefix(10.0.0.0/8) should be populated as part of stacked link
+        // in local_net_access map
+        verify(bpfNetMaps, times(2)).addLocalNetAccess(
+                eq(PREFIX_LENGTH_IPV4 + 8),
+                eq(WIFI_IFNAME_2),
+                eq(InetAddresses.parseNumericAddress("10.0.0.0")),
+                eq(0),
+                eq(0),
+                eq(false)
+        )
+        // Verifying newly stacked IPv6 address should be populated in local_net_access map
+        verify(bpfNetMaps).addLocalNetAccess(
+                eq(PREFIX_LENGTH_IPV6 + LOCAL_IPV6_IP_ADDRESS_3_PREFIX.getPrefixLength()),
+                eq(WIFI_IFNAME_3),
+                eq(LOCAL_IPV6_IP_ADDRESS_3_PREFIX.getAddress()),
+                eq(0),
+                eq(0),
+                eq(false)
+        )
+        // Verifying old base IPv6 address should be removed from local_net_access map
+        verify(bpfNetMaps).removeLocalNetAccess(
+                eq(PREFIX_LENGTH_IPV6 + LOCAL_IPV6_IP_ADDRESS_PREFIX.getPrefixLength()),
+                eq(WIFI_IFNAME),
+                eq(LOCAL_IPV6_IP_ADDRESS_PREFIX.getAddress()),
+                eq(0),
+                eq(0)
+        )
+        // As both stacked links is had same prefix, 10.0.0.0/8 should not be removed from
+        // local_net_access map.
+        verify(bpfNetMaps, never()).removeLocalNetAccess(
+                eq(PREFIX_LENGTH_IPV4 + 8),
+                eq(WIFI_IFNAME_2),
+                eq(InetAddresses.parseNumericAddress("10.0.0.0")),
+                eq(0),
+                eq(0)
+        )
+    }
+
+    @Test
+    fun testChangeLinkPropertiesWithLinkAddressesInSameRange_AddressIntactInBpfMap() {
+        val nr = nr(TRANSPORT_WIFI)
+        val cb = TestableNetworkCallback()
+        cm.requestNetwork(nr, cb)
+
+        val wifiLp = lp(WIFI_IFNAME, LOCAL_IPV4_LINK_ADDRRESS_1)
+        val wifiAgent = Agent(nc = wifiNc, lp = wifiLp)
+        wifiAgent.connect()
+        cb.expectAvailableCallbacks(wifiAgent.network, validated = false)
+
+        // Multicast and Broadcast address should always be populated in local_net_access map
+        verifyPopulationOfMulticastAndBroadcastAddress()
+        // Verifying IPv4 matching prefix(10.0.0.0/8) should be populated in local_net_access map
+        verify(bpfNetMaps).addLocalNetAccess(
+            eq(PREFIX_LENGTH_IPV4 + 8),
+            eq(WIFI_IFNAME),
+            eq(LOCAL_IPV4_IP_ADDRESS_PREFIX_1.getAddress()),
+            eq(0),
+            eq(0),
+            eq(false)
+        )
+
+        // Updating Link Property from one IPv4 to another IPv4 within same range(10.0.0.0/8)
+        val wifiLp2 = lp(WIFI_IFNAME, LOCAL_IPV4_LINK_ADDRRESS_2)
+        wifiAgent.sendLinkProperties(wifiLp2)
+        cb.expect<LinkPropertiesChanged>(wifiAgent.network)
+
+        // As both addresses below to same range, so no address should be removed from the map.
+        verify(bpfNetMaps, never()).removeLocalNetAccess(any(), any(), any(), any(), any())
+    }
+
+    @Test
+    fun testChangeLinkPropertiesWithDifferentInterface_AddressReplacedInBpfMap() {
+        val nr = nr(TRANSPORT_WIFI)
+        val cb = TestableNetworkCallback()
+        cm.requestNetwork(nr, cb)
+
+        val wifiLp = lp(WIFI_IFNAME, LOCAL_IPV6_LINK_ADDRESS)
+        val wifiAgent = Agent(nc = wifiNc, lp = wifiLp)
+        wifiAgent.connect()
+        cb.expectAvailableCallbacks(wifiAgent.network, validated = false)
+
+        // Multicast and Broadcast address should always be populated in local_net_access map
+        verifyPopulationOfMulticastAndBroadcastAddress()
+        // Verifying IPv6 address should be populated in local_net_access map
+        verify(bpfNetMaps).addLocalNetAccess(
+            eq(PREFIX_LENGTH_IPV6 + LOCAL_IPV6_IP_ADDRESS_PREFIX.getPrefixLength()),
+            eq(WIFI_IFNAME),
+            eq(LOCAL_IPV6_IP_ADDRESS_PREFIX.getAddress()),
+            eq(0),
+            eq(0),
+            eq(false)
+        )
+
+        // Updating Link Property by changing interface name which has IPv4 instead of IPv6
+        val wifiLp2 = lp(WIFI_IFNAME_2, LOCAL_IPV4_LINK_ADDRRESS_1)
+        wifiAgent.sendLinkProperties(wifiLp2)
+        cb.expect<LinkPropertiesChanged>(wifiAgent.network)
+
+        // Multicast and Broadcast address should be populated in local_net_access map for
+        // new interface
+        verifyPopulationOfMulticastAndBroadcastAddress(WIFI_IFNAME_2)
+        // Verifying IPv4 matching prefix(10.0.0.0/8) should be populated in local_net_access map
+        verify(bpfNetMaps).addLocalNetAccess(
+            eq(PREFIX_LENGTH_IPV4 + 8),
+            eq(WIFI_IFNAME_2),
+            eq(InetAddresses.parseNumericAddress("10.0.0.0")),
+            eq(0),
+            eq(0),
+            eq(false)
+        )
+        // Multicast and Broadcast address should be removed in local_net_access map for
+        // old interface
+        verifyRemovalOfMulticastAndBroadcastAddress()
+        // Verifying IPv6 address should be removed from local_net_access map
+        verify(bpfNetMaps).removeLocalNetAccess(
+            eq(PREFIX_LENGTH_IPV6 + LOCAL_IPV6_IP_ADDRESS_PREFIX.getPrefixLength()),
+            eq(WIFI_IFNAME),
+            eq(LOCAL_IPV6_IP_ADDRESS_PREFIX.getAddress()),
+            eq(0),
+            eq(0)
+        )
+    }
+
+    @Test
+    fun testAddingAnotherNetwork_AllAddressesAddedInBpfMap() {
+        val nr = nr(TRANSPORT_WIFI)
+        val cb = TestableNetworkCallback()
+        cm.requestNetwork(nr, cb)
+
+        val wifiLp = lp(WIFI_IFNAME, LOCAL_IPV6_LINK_ADDRESS)
+        val wifiAgent = Agent(nc = wifiNc, lp = wifiLp)
+        wifiAgent.connect()
+        cb.expectAvailableCallbacks(wifiAgent.network, validated = false)
+
+        // Multicast and Broadcast address should always be populated in local_net_access map
+        verifyPopulationOfMulticastAndBroadcastAddress()
+        // Verifying IPv6 address should be populated in local_net_access map
+        verify(bpfNetMaps).addLocalNetAccess(
+            eq(PREFIX_LENGTH_IPV6 + LOCAL_IPV6_IP_ADDRESS_PREFIX.getPrefixLength()),
+            eq(WIFI_IFNAME),
+            eq(LOCAL_IPV6_IP_ADDRESS_PREFIX.getAddress()),
+            eq(0),
+            eq(0),
+            eq(false)
+        )
+
+        // Adding another network with LinkProperty having IPv4 in LinkAddress
+        val wifiLp2 = lp(WIFI_IFNAME_2, LOCAL_IPV4_LINK_ADDRRESS_1)
+        val wifiAgent2 = Agent(nc = wifiNc, lp = wifiLp2)
+        wifiAgent2.connect()
+
+        // Multicast and Broadcast address should always be populated in local_net_access map
+        verifyPopulationOfMulticastAndBroadcastAddress(WIFI_IFNAME_2)
+        // Verifying IPv4 matching prefix(10.0.0.0/8) should be populated in local_net_access map
+        verify(bpfNetMaps).addLocalNetAccess(
+            eq(PREFIX_LENGTH_IPV4 + 8),
+            eq(WIFI_IFNAME_2),
+            eq(InetAddresses.parseNumericAddress("10.0.0.0")),
+            eq(0),
+            eq(0),
+            eq(false)
+        )
+        // Verifying nothing should be removed from local_net_access map
+        verify(bpfNetMaps, never()).removeLocalNetAccess(any(), any(), any(), any(), any())
+    }
+
+    @Test
+    fun testDestroyingNetwork_AddressesRemovedFromBpfMap() {
+        val nr = nr(TRANSPORT_WIFI)
+        val cb = TestableNetworkCallback()
+        cm.requestNetwork(nr, cb)
+
+        val wifiLp = lp(WIFI_IFNAME, LOCAL_IPV6_LINK_ADDRESS)
+        val wifiAgent = Agent(nc = wifiNc, lp = wifiLp)
+        wifiAgent.connect()
+        cb.expectAvailableCallbacks(wifiAgent.network, validated = false)
+
+        // Multicast and Broadcast address should always be populated in local_net_access map
+        verifyPopulationOfMulticastAndBroadcastAddress()
+        // Verifying IPv6 address should be populated in local_net_access map
+        verify(bpfNetMaps).addLocalNetAccess(
+            eq( PREFIX_LENGTH_IPV6 + LOCAL_IPV6_IP_ADDRESS_PREFIX.getPrefixLength()),
+            eq(WIFI_IFNAME),
+            eq(LOCAL_IPV6_IP_ADDRESS_PREFIX.getAddress()),
+            eq(0),
+            eq(0),
+            eq(false)
+        )
+
+        // Unregistering the network
+        wifiAgent.unregisterAfterReplacement(LONG_TIMEOUT_MS)
+        cb.expect<Lost>(wifiAgent.network)
+
+        // Multicast and Broadcast address should be removed in local_net_access map for
+        // old interface
+        verifyRemovalOfMulticastAndBroadcastAddress()
+        // Verifying IPv6 address should be removed from local_net_access map
+        verify(bpfNetMaps).removeLocalNetAccess(
+            eq(PREFIX_LENGTH_IPV6 + LOCAL_IPV6_IP_ADDRESS_PREFIX.getPrefixLength()),
+            eq(WIFI_IFNAME),
+            eq(LOCAL_IPV6_IP_ADDRESS_PREFIX.getAddress()),
+            eq(0),
+            eq(0)
+        )
+    }
+
+    // Verify if multicast and broadcast addresses have been added using addLocalNetAccess
+    fun verifyPopulationOfMulticastAndBroadcastAddress(
+        interfaceName: String = WIFI_IFNAME
+    ) {
+        verify(bpfNetMaps).addLocalNetAccess(
+            eq(PREFIX_LENGTH_IPV4 + 4),
+            eq(interfaceName),
+            eq(InetAddresses.parseNumericAddress("224.0.0.0")),
+            eq(0),
+            eq(0),
+            eq(false)
+        )
+        verify(bpfNetMaps).addLocalNetAccess(
+            eq(PREFIX_LENGTH_IPV6 + 8),
+            eq(interfaceName),
+            eq(InetAddresses.parseNumericAddress("ff00::")),
+            eq(0),
+            eq(0),
+            eq(false)
+        )
+        verify(bpfNetMaps).addLocalNetAccess(
+            eq(PREFIX_LENGTH_IPV4 + 32),
+            eq(interfaceName),
+            eq(InetAddresses.parseNumericAddress("255.255.255.255")),
+            eq(0),
+            eq(0),
+            eq(false)
+        )
+    }
+
+    // Verify if multicast and broadcast addresses have been removed using removeLocalNetAccess
+    fun verifyRemovalOfMulticastAndBroadcastAddress(
+        interfaceName: String = WIFI_IFNAME
+    ) {
+        verify(bpfNetMaps).removeLocalNetAccess(
+            eq(PREFIX_LENGTH_IPV4 + 4),
+            eq(interfaceName),
+            eq(InetAddresses.parseNumericAddress("224.0.0.0")),
+            eq(0),
+            eq(0)
+        )
+        verify(bpfNetMaps).removeLocalNetAccess(
+            eq(PREFIX_LENGTH_IPV6 + 8),
+            eq(interfaceName),
+            eq(InetAddresses.parseNumericAddress("ff00::")),
+            eq(0),
+            eq(0)
+        )
+        verify(bpfNetMaps).removeLocalNetAccess(
+            eq(PREFIX_LENGTH_IPV4 + 32),
+            eq(interfaceName),
+            eq(InetAddresses.parseNumericAddress("255.255.255.255")),
+            eq(0),
+            eq(0)
+        )
+    }
+}
diff --git a/tests/unit/java/com/android/server/connectivityservice/base/CSTest.kt b/tests/unit/java/com/android/server/connectivityservice/base/CSTest.kt
index ae196a6..557bfd6 100644
--- a/tests/unit/java/com/android/server/connectivityservice/base/CSTest.kt
+++ b/tests/unit/java/com/android/server/connectivityservice/base/CSTest.kt
@@ -18,6 +18,7 @@
 
 import android.app.AlarmManager
 import android.app.AppOpsManager
+import android.bluetooth.BluetoothManager
 import android.content.BroadcastReceiver
 import android.content.Context
 import android.content.Intent
@@ -71,6 +72,7 @@
 import com.android.server.connectivity.MultinetworkPolicyTracker
 import com.android.server.connectivity.MultinetworkPolicyTrackerTestDependencies
 import com.android.server.connectivity.NetworkRequestStateStatsMetrics
+import com.android.server.connectivity.PermissionMonitor
 import com.android.server.connectivity.ProxyTracker
 import com.android.server.connectivity.SatelliteAccessController
 import com.android.testutils.visibleOnHandlerThread
@@ -209,12 +211,14 @@
         doReturn(true).`when`(it).isDataCapable()
     }
     val subscriptionManager = mock<SubscriptionManager>()
+    val bluetoothManager = mock<BluetoothManager>()
 
     val multicastRoutingCoordinatorService = mock<MulticastRoutingCoordinatorService>()
     val satelliteAccessController = mock<SatelliteAccessController>()
     val destroySocketsWrapper = mock<DestroySocketsWrapper>()
 
     val deps = CSDeps()
+    val permDeps = PermDeps()
 
     // Initializations that start threads are done from setUp to avoid thread leak
     lateinit var alarmHandlerThread: HandlerThread
@@ -251,7 +255,9 @@
 
         alarmHandlerThread = HandlerThread("TestAlarmManager").also { it.start() }
         alarmManager = makeMockAlarmManager(alarmHandlerThread)
-        service = makeConnectivityService(context, netd, deps).also { it.systemReadyInternal() }
+        service = makeConnectivityService(context, netd, deps, permDeps).also {
+            it.systemReadyInternal()
+        }
         cm = ConnectivityManager(context, service)
         // csHandler initialization must be after makeConnectivityService since ConnectivityService
         // constructor starts csHandlerThread
@@ -393,6 +399,12 @@
             // Call mocked destroyLiveTcpSocketsByOwnerUids so that test can verify this method call
             destroySocketsWrapper.destroyLiveTcpSocketsByOwnerUids(ownerUids)
         }
+
+        override fun makeL2capNetworkProvider(context: Context) = null
+    }
+
+    inner class PermDeps : PermissionMonitor.Dependencies() {
+        override fun shouldEnforceLocalNetRestrictions(uid: Int) = false
     }
 
     inner class CSContext(base: Context) : BroadcastInterceptingContext(base) {
@@ -503,6 +515,7 @@
             Context.BATTERY_STATS_SERVICE -> batteryManager
             Context.STATS_MANAGER -> null // Stats manager is final and can't be mocked
             Context.APP_OPS_SERVICE -> appOpsManager
+            Context.BLUETOOTH_SERVICE -> bluetoothManager
             else -> super.getSystemService(serviceName)
         }
 
diff --git a/tests/unit/java/com/android/server/connectivityservice/base/CSTestHelpers.kt b/tests/unit/java/com/android/server/connectivityservice/base/CSTestHelpers.kt
index 8ff790c..a53d430 100644
--- a/tests/unit/java/com/android/server/connectivityservice/base/CSTestHelpers.kt
+++ b/tests/unit/java/com/android/server/connectivityservice/base/CSTestHelpers.kt
@@ -23,6 +23,7 @@
 import android.content.Context
 import android.content.pm.PackageManager
 import android.content.pm.PackageManager.FEATURE_BLUETOOTH
+import android.content.pm.PackageManager.FEATURE_BLUETOOTH_LE
 import android.content.pm.PackageManager.FEATURE_ETHERNET
 import android.content.pm.PackageManager.FEATURE_WIFI
 import android.content.pm.PackageManager.FEATURE_WIFI_DIRECT
@@ -53,6 +54,7 @@
 import com.android.modules.utils.build.SdkLevel
 import com.android.server.ConnectivityService.Dependencies
 import com.android.server.connectivity.ConnectivityResources
+import com.android.server.connectivity.PermissionMonitor
 import kotlin.test.fail
 import org.mockito.ArgumentMatchers
 import org.mockito.ArgumentMatchers.any
@@ -103,7 +105,13 @@
 }
 
 internal fun makeMockPackageManager(realContext: Context) = mock<PackageManager>().also { pm ->
-    val supported = listOf(FEATURE_WIFI, FEATURE_WIFI_DIRECT, FEATURE_BLUETOOTH, FEATURE_ETHERNET)
+    val supported = listOf(
+            FEATURE_WIFI,
+            FEATURE_WIFI_DIRECT,
+            FEATURE_BLUETOOTH,
+            FEATURE_BLUETOOTH_LE,
+            FEATURE_ETHERNET
+    )
     doReturn(true).`when`(pm).hasSystemFeature(argThat { supported.contains(it) })
     val myPackageName = realContext.packageName
     val myPackageInfo = realContext.packageManager.getPackageInfo(myPackageName,
@@ -185,13 +193,14 @@
 
 private val TEST_LINGER_DELAY_MS = 400
 private val TEST_NASCENT_DELAY_MS = 300
-internal fun makeConnectivityService(context: Context, netd: INetd, deps: Dependencies) =
+internal fun makeConnectivityService(context: Context, netd: INetd, deps: Dependencies,
+                                     mPermDeps: PermissionMonitor.Dependencies) =
         ConnectivityService(
                 context,
                 mock<IDnsResolver>(),
                 mock<IpConnectivityLog>(),
                 netd,
-                deps).also {
+                deps, mPermDeps).also {
             it.mLingerDelayMs = TEST_LINGER_DELAY_MS
             it.mNascentDelayMs = TEST_NASCENT_DELAY_MS
         }
diff --git a/tests/unit/java/com/android/server/net/HeaderCompressionUtilsTest.kt b/tests/unit/java/com/android/server/net/HeaderCompressionUtilsTest.kt
new file mode 100644
index 0000000..7ebe384
--- /dev/null
+++ b/tests/unit/java/com/android/server/net/HeaderCompressionUtilsTest.kt
@@ -0,0 +1,271 @@
+/*
+ * Copyright (C) 2025 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.server.net
+
+import android.os.Build
+import com.android.internal.util.HexDump
+import com.android.testutils.ConnectivityModuleTest
+import com.android.testutils.DevSdkIgnoreRule
+import com.android.testutils.DevSdkIgnoreRunner
+import com.google.common.truth.Truth.assertThat
+import java.io.IOException
+import java.nio.BufferUnderflowException
+import kotlin.test.assertFailsWith
+import org.junit.Test
+import org.junit.runner.RunWith
+
+private const val TIMEOUT = 1000L
+
+@ConnectivityModuleTest
+@RunWith(DevSdkIgnoreRunner::class)
+@DevSdkIgnoreRule.IgnoreUpTo(Build.VERSION_CODES.R)
+class HeaderCompressionUtilsTest {
+
+    private fun decompressHex(hex: String): ByteArray {
+        val bytes = HexDump.hexStringToByteArray(hex)
+        val buf = bytes.copyOf(1500)
+        val newLen = HeaderCompressionUtils.decompress6lowpan(buf, bytes.size)
+        return buf.copyOf(newLen)
+    }
+
+    private fun compressHex(hex: String): ByteArray {
+        val buf = HexDump.hexStringToByteArray(hex)
+        val newLen = HeaderCompressionUtils.compress6lowpan(buf, buf.size)
+        return buf.copyOf(newLen)
+    }
+
+    private fun String.decodeHex() = HexDump.hexStringToByteArray(this)
+
+    @Test
+    fun testHeaderDecompression() {
+        // TF: 00, NH: 0, HLIM: 00, CID: 0, SAC: 0, SAM: 00, M: 0, DAC: 0, DAM: 00
+        var input = "6000" +
+                    "ccf" +                               // ECN + DSCP + 4-bit Pad (here "f")
+                    "12345" +                             // flow label
+                    "11" +                                // next header
+                    "e7" +                                // hop limit
+                    "abcdef1234567890abcdef1234567890" +  // source
+                    "aaabbbcccdddeeefff00011122233344" +  // dest
+                    "abcd"                                // payload
+
+        var output = "6" +                                // version
+                     "cc" +                               // traffic class
+                     "12345" +                            // flow label
+                     "0002" +                             // payload length
+                     "11" +                               // next header
+                     "e7" +                               // hop limit
+                     "abcdef1234567890abcdef1234567890" + // source
+                     "aaabbbcccdddeeefff00011122233344" + // dest
+                     "abcd"                               // payload
+        assertThat(decompressHex(input)).isEqualTo(output.decodeHex())
+
+        // TF: 01, NH: 0, HLIM: 01, CID: 0, SAC: 0, SAM: 01, M: 0, DAC: 0, DAM: 01
+        input  = "6911" +
+                 "5" +                                // ECN + 2-bit pad (here "1")
+                 "f100e" +                            // flow label
+                 "42" +                               // next header
+                 "1102030405060708" +                 // source
+                 "aa0b0c0d0e0f1011" +                 // dest
+                 "abcd"                               // payload
+
+        output = "6" +                                // version
+                 "01" +                               // traffic class
+                 "f100e" +                            // flow label
+                 "0002" +                             // payload length
+                 "42" +                               // next header
+                 "01" +                               // hop limit
+                 "fe800000000000001102030405060708" + // source
+                 "fe80000000000000aa0b0c0d0e0f1011" + // dest
+                 "abcd"                               // payload
+        assertThat(decompressHex(input)).isEqualTo(output.decodeHex())
+
+        // TF: 10, NH: 0, HLIM: 10, CID: 0, SAC: 0, SAM: 10, M: 0, DAC: 0, DAM: 10
+        input  = "7222" +
+                 "cc" +                               // traffic class
+                 "43" +                               // next header
+                 "1234" +                             // source
+                 "abcd" +                             // dest
+                 "abcdef"                             // payload
+
+        output = "6" +                                // version
+                 "cc" +                               // traffic class
+                 "00000" +                            // flow label
+                 "0003" +                             // payload length
+                 "43" +                               // next header
+                 "40" +                               // hop limit
+                 "fe80000000000000000000fffe001234" + // source
+                 "fe80000000000000000000fffe00abcd" + // dest
+                 "abcdef"                             // payload
+        assertThat(decompressHex(input)).isEqualTo(output.decodeHex())
+
+        // TF: 11, NH: 0, HLIM: 11, CID: 0, SAC: 0, SAM: 10, M: 1, DAC: 0, DAM: 00
+        input  = "7b28" +
+                 "44" +                               // next header
+                 "1234" +                             // source
+                 "ff020000000000000000000000000001" + // dest
+                 "abcdef01"                           // payload
+
+        output = "6" +                                // version
+                 "00" +                               // traffic class
+                 "00000" +                            // flow label
+                 "0004" +                             // payload length
+                 "44" +                               // next header
+                 "ff" +                               // hop limit
+                 "fe80000000000000000000fffe001234" + // source
+                 "ff020000000000000000000000000001" + // dest
+                 "abcdef01"                           // payload
+        assertThat(decompressHex(input)).isEqualTo(output.decodeHex())
+
+        // TF: 11, NH: 0, HLIM: 11, CID: 0, SAC: 0, SAM: 10, M: 1, DAC: 0, DAM: 01
+        input  = "7b29" +
+                 "44" +                               // next header
+                 "1234" +                             // source
+                 "02abcdef1234" +                     // dest
+                 "abcdef01"                           // payload
+
+        output = "6" +                                // version
+                 "00" +                               // traffic class
+                 "00000" +                            // flow label
+                 "0004" +                             // payload length
+                 "44" +                               // next header
+                 "ff" +                               // hop limit
+                 "fe80000000000000000000fffe001234" + // source
+                 "ff02000000000000000000abcdef1234" + // dest
+                 "abcdef01"                           // payload
+        assertThat(decompressHex(input)).isEqualTo(output.decodeHex())
+
+        // TF: 11, NH: 0, HLIM: 11, CID: 0, SAC: 0, SAM: 10, M: 1, DAC: 0, DAM: 10
+        input  = "7b2a" +
+                 "44" +                               // next header
+                 "1234" +                             // source
+                 "ee123456" +                         // dest
+                 "abcdef01"                           // payload
+
+        output = "6" +                                // version
+                 "00" +                               // traffic class
+                 "00000" +                            // flow label
+                 "0004" +                             // payload length
+                 "44" +                               // next header
+                 "ff" +                               // hop limit
+                 "fe80000000000000000000fffe001234" + // source
+                 "ffee0000000000000000000000123456" + // dest
+                 "abcdef01"                           // payload
+        assertThat(decompressHex(input)).isEqualTo(output.decodeHex())
+
+        // TF: 11, NH: 0, HLIM: 11, CID: 0, SAC: 0, SAM: 10, M: 1, DAC: 0, DAM: 11
+        input  = "7b2b" +
+                 "44" +                               // next header
+                 "1234" +                             // source
+                 "89" +                               // dest
+                 "abcdef01"                           // payload
+
+        output = "6" +                                // version
+                 "00" +                               // traffic class
+                 "00000" +                            // flow label
+                 "0004" +                             // payload length
+                 "44" +                               // next header
+                 "ff" +                               // hop limit
+                 "fe80000000000000000000fffe001234" + // source
+                 "ff020000000000000000000000000089" + // dest
+                 "abcdef01"                           // payload
+        assertThat(decompressHex(input)).isEqualTo(output.decodeHex())
+    }
+
+    @Test
+    fun testHeaderDecompression_invalidPacket() {
+        // 1-byte packet
+        var input = "60"
+        assertFailsWith(BufferUnderflowException::class) { decompressHex(input) }
+
+        // Short packet -- incomplete header
+        // TF: 11, NH: 0, HLIM: 11, CID: 0, SAC: 0, SAM: 10, M: 1, DAC: 0, DAM: 11
+        input  = "7b2b" +
+                 "44" +                               // next header
+                 "1234"                               // source
+        assertFailsWith(BufferUnderflowException::class) { decompressHex(input) }
+
+        // Packet starts with 0b111 instead of 0b011
+        // TF: 11, NH: 0, HLIM: 11, CID: 0, SAC: 0, SAM: 10, M: 1, DAC: 0, DAM: 11
+        input  = "fb2b" +
+                 "44" +                               // next header
+                 "1234" +                             // source
+                 "89" +                               // dest
+                 "abcdef01"                           // payload
+        assertFailsWith(IOException::class) { decompressHex(input) }
+
+        // Illegal option NH = 1. Note that the packet is not valid as the code should throw as soon
+        // as the illegal option is encountered.
+        // TF: 11, NH: 1, HLIM: 11, CID: 0, SAC: 0, SAM: 10, M: 1, DAC: 0, DAM: 11
+        input  = "7f2b" +
+                 "1234" +                             // source
+                 "89" +                               // dest
+                 "e0"                                 // Hop-by-hop options NHC
+        assertFailsWith(IOException::class) { decompressHex(input) }
+
+        // Illegal option CID = 1.
+        // TF: 11, NH: 0, HLIM: 11, CID: 1, SAC: 0, SAM: 10, M: 1, DAC: 0, DAM: 11
+        input  = "7bab00" +
+                 "1234" +                             // source
+                 "89" +                               // dest
+                 "e0"                                 // Hop-by-hop options NHC
+        assertFailsWith(IOException::class) { decompressHex(input) }
+
+        // Illegal option SAC = 1.
+        // TF: 11, NH: 0, HLIM: 11, CID: 0, SAC: 1, SAM: 10, M: 1, DAC: 0, DAM: 11
+        input  = "7b6b" +
+                 "1234" +                             // source
+                 "89" +                               // dest
+                 "e0"                                 // Hop-by-hop options NHC
+        assertFailsWith(IOException::class) { decompressHex(input) }
+
+        // Illegal option DAC = 1.
+        // TF: 10, NH: 0, HLIM: 10, CID: 0, SAC: 0, SAM: 10, M: 0, DAC: 1, DAM: 10
+        input  = "7226" +
+                 "cc" +                               // traffic class
+                 "43" +                               // next header
+                 "1234" +                             // source
+                 "abcd" +                             // dest
+                 "abcdef"                             // payload
+        assertFailsWith(IOException::class) { decompressHex(input) }
+
+
+        // Unsupported option DAM = 11
+        // TF: 10, NH: 0, HLIM: 10, CID: 0, SAC: 0, SAM: 10, M: 0, DAC: 0, DAM: 11
+        input  = "7223" +
+                 "cc" +                               // traffic class
+                 "43" +                               // next header
+                 "1234" +                             // source
+                 "abcdef"                             // payload
+        assertFailsWith(IOException::class) { decompressHex(input) }
+
+        // Unsupported option SAM = 11
+        // TF: 10, NH: 0, HLIM: 10, CID: 0, SAC: 0, SAM: 11, M: 0, DAC: 0, DAM: 10
+        input  = "7232" +
+                 "cc" +                               // traffic class
+                 "43" +                               // next header
+                 "abcd" +                             // dest
+                 "abcdef"                             // payload
+        assertFailsWith(IOException::class) { decompressHex(input) }
+    }
+
+    @Test
+    fun testHeaderCompression() {
+        val input  = "60120304000011fffe800000000000000000000000000001fe800000000000000000000000000002"
+        val output = "60000102030411fffe800000000000000000000000000001fe800000000000000000000000000002"
+        assertThat(compressHex(input)).isEqualTo(output.decodeHex())
+    }
+}
diff --git a/tests/unit/java/com/android/server/net/L2capPacketForwarderTest.kt b/tests/unit/java/com/android/server/net/L2capPacketForwarderTest.kt
index b3095ee..e261732 100644
--- a/tests/unit/java/com/android/server/net/L2capPacketForwarderTest.kt
+++ b/tests/unit/java/com/android/server/net/L2capPacketForwarderTest.kt
@@ -184,6 +184,7 @@
                 handler,
                 FdWrapper(ParcelFileDescriptor(tunFds[0])),
                 BluetoothSocketWrapper(bluetoothSocket),
+                false /* compressHeaders */,
                 callback
         )
     }
diff --git a/tests/unit/java/com/android/server/net/NetworkStatsServiceTest.java b/tests/unit/java/com/android/server/net/NetworkStatsServiceTest.java
index b528480..697bf9e 100644
--- a/tests/unit/java/com/android/server/net/NetworkStatsServiceTest.java
+++ b/tests/unit/java/com/android/server/net/NetworkStatsServiceTest.java
@@ -163,12 +163,13 @@
 import com.android.net.module.util.BpfDump;
 import com.android.net.module.util.IBpfMap;
 import com.android.net.module.util.LocationPermissionChecker;
+import com.android.net.module.util.SkDestroyListener;
 import com.android.net.module.util.Struct;
 import com.android.net.module.util.Struct.S32;
 import com.android.net.module.util.Struct.U8;
 import com.android.net.module.util.bpf.CookieTagMapKey;
 import com.android.net.module.util.bpf.CookieTagMapValue;
-import com.android.server.BpfNetMaps;
+import com.android.net.module.util.netlink.InetDiagMessage;
 import com.android.server.connectivity.ConnectivityResources;
 import com.android.server.net.NetworkStatsService.AlertObserver;
 import com.android.server.net.NetworkStatsService.NetworkStatsSettings;
@@ -211,6 +212,7 @@
 import java.util.Set;
 import java.util.concurrent.Executor;
 import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.function.Consumer;
 
 /**
  * Tests for {@link NetworkStatsService}.
@@ -286,8 +288,6 @@
     private LocationPermissionChecker mLocationPermissionChecker;
     private TestBpfMap<S32, U8> mUidCounterSetMap = spy(new TestBpfMap<>(S32.class, U8.class));
     @Mock
-    private BpfNetMaps mBpfNetMaps;
-    @Mock
     private SkDestroyListener mSkDestroyListener;
 
     private TestBpfMap<CookieTagMapKey, CookieTagMapValue> mCookieTagMap = new TestBpfMap<>(
@@ -608,13 +608,8 @@
         }
 
         @Override
-        public BpfNetMaps makeBpfNetMaps(Context ctx) {
-            return mBpfNetMaps;
-        }
-
-        @Override
-        public SkDestroyListener makeSkDestroyListener(
-                IBpfMap<CookieTagMapKey, CookieTagMapValue> cookieTagMap, Handler handler) {
+        public SkDestroyListener makeSkDestroyListener(Consumer<InetDiagMessage> consumer,
+                Handler handler) {
             return mSkDestroyListener;
         }
 
diff --git a/tests/unit/jni/Android.bp b/tests/unit/jni/Android.bp
index 1a833e1..1e9db03 100644
--- a/tests/unit/jni/Android.bp
+++ b/tests/unit/jni/Android.bp
@@ -22,6 +22,7 @@
     ],
 
     shared_libs: [
+        "libbase",
         "liblog",
         "libnativehelper",
         "libnetdutils",
diff --git a/thread/tests/cts/Android.bp b/thread/tests/cts/Android.bp
index 2630d21..901dee7 100644
--- a/thread/tests/cts/Android.bp
+++ b/thread/tests/cts/Android.bp
@@ -51,7 +51,6 @@
     libs: [
         "android.test.base.stubs",
         "android.test.runner.stubs",
-        "framework-connectivity-module-api-stubs-including-flagged",
     ],
     // Test coverage system runs on different devices. Need to
     // compile for all architectures.
diff --git a/thread/tests/cts/AndroidTest.xml b/thread/tests/cts/AndroidTest.xml
index e954d3b..89d2ce5 100644
--- a/thread/tests/cts/AndroidTest.xml
+++ b/thread/tests/cts/AndroidTest.xml
@@ -57,13 +57,4 @@
         <option name="exclude-annotation" value="org.junit.Ignore"/>
     </test>
 
-    <!--
-        This doesn't override a read-only flag, to run the tests locally with `epskc_enabled` flag
-        enabled, set the flag to `is_fixed_read_only: false`. This should be removed after the
-        `epskc_enabled` flag is rolled out.
-    -->
-    <target_preparer class="com.android.tradefed.targetprep.FeatureFlagTargetPreparer">
-        <option name="flag-value"
-                value="thread_network/com.android.net.thread.flags.epskc_enabled=true"/>
-    </target_preparer>
 </configuration>
diff --git a/thread/tests/cts/src/android/net/thread/cts/ThreadNetworkControllerTest.java b/thread/tests/cts/src/android/net/thread/cts/ThreadNetworkControllerTest.java
index 2d487ca..a979721 100644
--- a/thread/tests/cts/src/android/net/thread/cts/ThreadNetworkControllerTest.java
+++ b/thread/tests/cts/src/android/net/thread/cts/ThreadNetworkControllerTest.java
@@ -1296,6 +1296,7 @@
     }
 
     @Test
+    @Ignore("b/333649897, b/332195449: The 3 meshcop tests are flaky in different environments")
     public void meshcopService_threadEnabledButNotJoined_discoveredButNoNetwork() throws Exception {
         setUpTestNetwork();
 
@@ -1348,6 +1349,7 @@
     }
 
     @Test
+    @Ignore("b/333649897, b/332195449: The 3 meshcop tests are flaky in different environments")
     public void meshcopService_threadDisabled_notDiscovered() throws Exception {
         setUpTestNetwork();
         CompletableFuture<NsdServiceInfo> serviceLostFuture = new CompletableFuture<>();
diff --git a/thread/tests/integration/src/android/net/thread/InternetAccessTest.kt b/thread/tests/integration/src/android/net/thread/InternetAccessTest.kt
index 3c9aa07..46d4708 100644
--- a/thread/tests/integration/src/android/net/thread/InternetAccessTest.kt
+++ b/thread/tests/integration/src/android/net/thread/InternetAccessTest.kt
@@ -167,6 +167,8 @@
         val ftd = ftds[0]
         joinNetworkAndWaitForOmr(ftd, DEFAULT_DATASET)
         dnsServer.start()
+        ftd.autoStartSrpClient()
+        ftd.waitForSrpServer()
 
         val ipv4Addresses =
             ftd.resolveHost("google.com", TYPE_A).map { extractIpv4AddressFromMappedAddress(it) }
@@ -181,6 +183,8 @@
         val ftd = ftds[0]
         joinNetworkAndWaitForOmr(ftd, DEFAULT_DATASET)
         dnsServer.start()
+        ftd.autoStartSrpClient()
+        ftd.waitForSrpServer()
 
         assertThat(ftd.resolveHost("google.com", TYPE_A)).isEmpty()
         assertThat(ftd.resolveHost("google.com", TYPE_AAAA)).isEmpty()
diff --git a/thread/tests/integration/src/android/net/thread/ServiceDiscoveryTest.java b/thread/tests/integration/src/android/net/thread/ServiceDiscoveryTest.java
index 6c2a9bb..f959ccf 100644
--- a/thread/tests/integration/src/android/net/thread/ServiceDiscoveryTest.java
+++ b/thread/tests/integration/src/android/net/thread/ServiceDiscoveryTest.java
@@ -113,8 +113,8 @@
 
     @Before
     public void setUp() throws Exception {
-        mOtCtl.factoryReset();
         mController.setEnabledAndWait(true);
+        mController.leaveAndWait();
         mController.joinAndWait(DEFAULT_DATASET);
         mNsdManager = mContext.getSystemService(NsdManager.class);
 
diff --git a/thread/tests/integration/src/android/net/thread/ThreadIntegrationTest.java b/thread/tests/integration/src/android/net/thread/ThreadIntegrationTest.java
index 8594518..0e8f824 100644
--- a/thread/tests/integration/src/android/net/thread/ThreadIntegrationTest.java
+++ b/thread/tests/integration/src/android/net/thread/ThreadIntegrationTest.java
@@ -132,11 +132,8 @@
     public void setUp() throws Exception {
         mExecutor = Executors.newSingleThreadExecutor();
         mOtCtl = new OtDaemonController();
+        mController.setEnabledAndWait(true);
         mController.leaveAndWait();
-
-        // TODO: b/323301831 - This is a workaround to avoid unnecessary delay to re-form a network
-        mOtCtl.factoryReset();
-
         mFtd = new FullThreadDevice(10 /* nodeId */);
     }
 
@@ -355,7 +352,6 @@
         mOtCtl.executeCommand("netdata register");
 
         mController.leaveAndWait();
-        mOtCtl.factoryReset();
         mController.joinAndWait(DEFAULT_DATASET);
 
         LinkProperties lp = cm.getLinkProperties(getThreadNetwork(CALLBACK_TIMEOUT));
diff --git a/thread/tests/integration/src/android/net/thread/ThreadNetworkShellCommandTest.java b/thread/tests/integration/src/android/net/thread/ThreadNetworkShellCommandTest.java
index 5f0a176..dcccbf1 100644
--- a/thread/tests/integration/src/android/net/thread/ThreadNetworkShellCommandTest.java
+++ b/thread/tests/integration/src/android/net/thread/ThreadNetworkShellCommandTest.java
@@ -67,11 +67,7 @@
 
     @Before
     public void setUp() throws Exception {
-        // TODO(b/366141754): The current implementation of "thread_network ot-ctl factoryreset"
-        // results in timeout error.
-        // A future fix will provide proper support for factoryreset, allowing us to replace the
-        // legacy "ot-ctl".
-        mOtCtl.factoryReset();
+        mController.leaveAndWait();
 
         mFtd = new FullThreadDevice(10 /* nodeId */);
         ensureThreadEnabled();
diff --git a/thread/tests/integration/src/android/net/thread/utils/FullThreadDevice.java b/thread/tests/integration/src/android/net/thread/utils/FullThreadDevice.java
index 209eed6..38961a3 100644
--- a/thread/tests/integration/src/android/net/thread/utils/FullThreadDevice.java
+++ b/thread/tests/integration/src/android/net/thread/utils/FullThreadDevice.java
@@ -521,7 +521,7 @@
     }
 
     /** Waits for an SRP server to be present in Network Data */
-    private void waitForSrpServer() throws TimeoutException {
+    public void waitForSrpServer() throws TimeoutException {
         // CLI output:
         // > srp client server
         // [fd64:db12:25f4:7e0b:1bfc:6344:25ac:2dd7]:53538
diff --git a/thread/tests/integration/src/android/net/thread/utils/IntegrationTestUtils.kt b/thread/tests/integration/src/android/net/thread/utils/IntegrationTestUtils.kt
index 801e21e..f00c9cd 100644
--- a/thread/tests/integration/src/android/net/thread/utils/IntegrationTestUtils.kt
+++ b/thread/tests/integration/src/android/net/thread/utils/IntegrationTestUtils.kt
@@ -603,11 +603,12 @@
     /** Enables Thread and joins the specified Thread network. */
     @JvmStatic
     fun enableThreadAndJoinNetwork(dataset: ActiveOperationalDataset) {
-        // TODO: b/323301831 - This is a workaround to avoid unnecessary delay to re-form a network
-        OtDaemonController().factoryReset();
-
         val context: Context = requireNotNull(ApplicationProvider.getApplicationContext());
         val controller = requireNotNull(ThreadNetworkControllerWrapper.newInstance(context));
+
+        // TODO: b/323301831 - This is a workaround to avoid unnecessary delay to re-form a network
+        controller.leaveAndWait();
+
         controller.setEnabledAndWait(true);
         controller.joinAndWait(dataset);
     }
diff --git a/thread/tests/multidevices/Android.bp b/thread/tests/multidevices/Android.bp
index 050caa8..1d2ae62 100644
--- a/thread/tests/multidevices/Android.bp
+++ b/thread/tests/multidevices/Android.bp
@@ -35,9 +35,4 @@
         "mts-tethering",
         "general-tests",
     ],
-    version: {
-        py3: {
-            embedded_launcher: true,
-        },
-    },
 }