diff --git a/Tethering/tests/unit/src/com/android/networkstack/tethering/TetheringServiceTest.java b/Tethering/tests/unit/src/com/android/networkstack/tethering/TetheringServiceTest.java
index 38f1e9c..da81bda 100644
--- a/Tethering/tests/unit/src/com/android/networkstack/tethering/TetheringServiceTest.java
+++ b/Tethering/tests/unit/src/com/android/networkstack/tethering/TetheringServiceTest.java
@@ -666,7 +666,7 @@
 
             // Calling System.gc() or System.runFinalization() doesn't guarantee GCs or finalizers
             // are executed synchronously. The finalizer is called after GC on a separate thread.
-            final int attempts = 100;
+            final int attempts = 600;
             final long waitIntervalMs = 50;
             for (int i = 0; i < attempts; i++) {
                 forceGc();
diff --git a/framework-t/api/system-current.txt b/framework-t/api/system-current.txt
index c2d245c..87b0a64 100644
--- a/framework-t/api/system-current.txt
+++ b/framework-t/api/system-current.txt
@@ -260,6 +260,7 @@
   public class IpSecManager {
     method @RequiresPermission(android.Manifest.permission.MANAGE_IPSEC_TUNNELS) public void applyTunnelModeTransform(@NonNull android.net.IpSecManager.IpSecTunnelInterface, int, @NonNull android.net.IpSecTransform) throws java.io.IOException;
     method @NonNull @RequiresPermission(android.Manifest.permission.MANAGE_IPSEC_TUNNELS) public android.net.IpSecManager.IpSecTunnelInterface createIpSecTunnelInterface(@NonNull java.net.InetAddress, @NonNull java.net.InetAddress, @NonNull android.net.Network) throws java.io.IOException, android.net.IpSecManager.ResourceUnavailableException;
+    method @RequiresPermission(android.Manifest.permission.MANAGE_IPSEC_TUNNELS) public void startTunnelModeTransformMigration(@NonNull android.net.IpSecTransform, @NonNull java.net.InetAddress, @NonNull java.net.InetAddress);
   }
 
   public static final class IpSecManager.IpSecTunnelInterface implements java.lang.AutoCloseable {
diff --git a/framework-t/src/android/net/IpSecManager.java b/framework-t/src/android/net/IpSecManager.java
index ff021d6..c8469b1 100644
--- a/framework-t/src/android/net/IpSecManager.java
+++ b/framework-t/src/android/net/IpSecManager.java
@@ -823,16 +823,18 @@
          * Update the underlying network for this IpSecTunnelInterface.
          *
          * <p>This new underlying network will be used for all transforms applied AFTER this call is
-         * complete. Before new {@link IpSecTransform}(s) with matching addresses are applied to
-         * this tunnel interface, traffic will still use the old SA, and be routed on the old
+         * complete. Before {@link IpSecTransform}(s) with matching addresses are applied to this
+         * tunnel interface, traffic will still use the old transform, and be routed on the old
          * underlying network.
          *
          * <p>To migrate IPsec tunnel mode traffic, a caller should:
          *
          * <ol>
          *   <li>Update the IpSecTunnelInterface’s underlying network.
-         *   <li>Apply {@link IpSecTransform}(s) with matching addresses to this
-         *       IpSecTunnelInterface.
+         *   <li>Apply the new {@link IpSecTransform}(s) to this IpSecTunnelInterface. These can be
+         *       new {@link IpSecTransform}(s) with matching addresses, or {@link IpSecTransform}(s)
+         *       that have started migration (see {@link
+         *       IpSecManager#startTunnelModeTransformMigration}).
          * </ol>
          *
          * @param underlyingNetwork the new {@link Network} that will carry traffic for this tunnel.
@@ -841,7 +843,6 @@
          *     method will throw an {@link IllegalArgumentException}. If the IpSecTunnelInterface is
          *     later added to this network, all outbound traffic will be blackholed.
          */
-        // TODO: b/169171001 Update the documentation when transform migration is supported.
         // The purpose of making updating network and applying transforms separate is to leave open
         // the possibility to support lossless migration procedures. To do that, Android platform
         // will need to support multiple inbound tunnel mode transforms, just like it can support
@@ -1033,9 +1034,10 @@
      * @param newDestinationAddress the new destination address
      * @hide
      */
+    @SystemApi
     @RequiresFeature(FEATURE_IPSEC_TUNNEL_MIGRATION)
     @RequiresPermission(android.Manifest.permission.MANAGE_IPSEC_TUNNELS)
-    public void startMigration(
+    public void startTunnelModeTransformMigration(
             @NonNull IpSecTransform transform,
             @NonNull InetAddress newSourceAddress,
             @NonNull InetAddress newDestinationAddress) {
diff --git a/service-t/src/com/android/server/net/NetworkStatsService.java b/service-t/src/com/android/server/net/NetworkStatsService.java
index 3a17bdd..6206d83 100644
--- a/service-t/src/com/android/server/net/NetworkStatsService.java
+++ b/service-t/src/com/android/server/net/NetworkStatsService.java
@@ -2817,7 +2817,7 @@
             return;
         }
         if (map.isEmpty()) {
-            pw.println("No entries");
+            pw.println("");
             return;
         }
         // If there is a concurrent entry deletion, value could be null. http://b/220084230.
diff --git a/service/mdns/com/android/server/connectivity/mdns/EnqueueMdnsQueryCallable.java b/service/mdns/com/android/server/connectivity/mdns/EnqueueMdnsQueryCallable.java
index f7871f3..fdd1478 100644
--- a/service/mdns/com/android/server/connectivity/mdns/EnqueueMdnsQueryCallable.java
+++ b/service/mdns/com/android/server/connectivity/mdns/EnqueueMdnsQueryCallable.java
@@ -18,7 +18,9 @@
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
+import android.net.Network;
 import android.text.TextUtils;
+import android.util.Log;
 import android.util.Pair;
 
 import com.android.server.connectivity.mdns.util.MdnsLogger;
@@ -58,26 +60,29 @@
         }
     }
 
-    private final WeakReference<MdnsSocketClient> weakRequestSender;
+    private final WeakReference<MdnsSocketClientBase> weakRequestSender;
     private final MdnsPacketWriter packetWriter;
     private final String[] serviceTypeLabels;
     private final List<String> subtypes;
     private final boolean expectUnicastResponse;
     private final int transactionId;
+    private final Network network;
 
     EnqueueMdnsQueryCallable(
-            @NonNull MdnsSocketClient requestSender,
+            @NonNull MdnsSocketClientBase requestSender,
             @NonNull MdnsPacketWriter packetWriter,
             @NonNull String serviceType,
             @NonNull Collection<String> subtypes,
             boolean expectUnicastResponse,
-            int transactionId) {
+            int transactionId,
+            @Nullable Network network) {
         weakRequestSender = new WeakReference<>(requestSender);
         this.packetWriter = packetWriter;
         serviceTypeLabels = TextUtils.split(serviceType, "\\.");
         this.subtypes = new ArrayList<>(subtypes);
         this.expectUnicastResponse = expectUnicastResponse;
         this.transactionId = transactionId;
+        this.network = network;
     }
 
     // Incompatible return type for override of Callable#call().
@@ -86,7 +91,7 @@
     @Nullable
     public Pair<Integer, List<String>> call() {
         try {
-            MdnsSocketClient requestSender = weakRequestSender.get();
+            MdnsSocketClientBase requestSender = weakRequestSender.get();
             if (requestSender == null) {
                 return null;
             }
@@ -127,15 +132,24 @@
                     MdnsConstants.QCLASS_INTERNET
                             | (expectUnicastResponse ? MdnsConstants.QCLASS_UNICAST : 0));
 
-            InetAddress mdnsAddress = MdnsConstants.getMdnsIPv4Address();
-            if (requestSender.isOnIPv6OnlyNetwork()) {
-                mdnsAddress = MdnsConstants.getMdnsIPv6Address();
-            }
+            if (requestSender instanceof MdnsMultinetworkSocketClient) {
+                sendPacketToIpv4AndIpv6(requestSender, MdnsConstants.MDNS_PORT, network);
+                for (Integer emulatorPort : castShellEmulatorMdnsPorts) {
+                    sendPacketToIpv4AndIpv6(requestSender, emulatorPort, network);
+                }
+            } else if (requestSender instanceof MdnsSocketClient) {
+                final MdnsSocketClient client = (MdnsSocketClient) requestSender;
+                InetAddress mdnsAddress = MdnsConstants.getMdnsIPv4Address();
+                if (client.isOnIPv6OnlyNetwork()) {
+                    mdnsAddress = MdnsConstants.getMdnsIPv6Address();
+                }
 
-            sendPacketTo(requestSender,
-                    new InetSocketAddress(mdnsAddress, MdnsConstants.MDNS_PORT));
-            for (Integer emulatorPort : castShellEmulatorMdnsPorts) {
-                sendPacketTo(requestSender, new InetSocketAddress(mdnsAddress, emulatorPort));
+                sendPacketTo(client, new InetSocketAddress(mdnsAddress, MdnsConstants.MDNS_PORT));
+                for (Integer emulatorPort : castShellEmulatorMdnsPorts) {
+                    sendPacketTo(client, new InetSocketAddress(mdnsAddress, emulatorPort));
+                }
+            } else {
+                throw new IOException("Unknown socket client type: " + requestSender.getClass());
             }
             return Pair.create(transactionId, subtypes);
         } catch (IOException e) {
@@ -145,7 +159,7 @@
         }
     }
 
-    private void sendPacketTo(MdnsSocketClient requestSender, InetSocketAddress address)
+    private void sendPacketTo(MdnsSocketClientBase requestSender, InetSocketAddress address)
             throws IOException {
         DatagramPacket packet = packetWriter.getPacket(address);
         if (expectUnicastResponse) {
@@ -154,4 +168,31 @@
             requestSender.sendMulticastPacket(packet);
         }
     }
+
+    private void sendPacketFromNetwork(MdnsSocketClientBase requestSender,
+            InetSocketAddress address, Network network)
+            throws IOException {
+        DatagramPacket packet = packetWriter.getPacket(address);
+        if (expectUnicastResponse) {
+            requestSender.sendUnicastPacket(packet, network);
+        } else {
+            requestSender.sendMulticastPacket(packet, network);
+        }
+    }
+
+    private void sendPacketToIpv4AndIpv6(MdnsSocketClientBase requestSender, int port,
+            Network network) {
+        try {
+            sendPacketFromNetwork(requestSender,
+                    new InetSocketAddress(MdnsConstants.getMdnsIPv4Address(), port), network);
+        } catch (IOException e) {
+            Log.i(TAG, "Can't send packet to IPv4", e);
+        }
+        try {
+            sendPacketFromNetwork(requestSender,
+                    new InetSocketAddress(MdnsConstants.getMdnsIPv6Address(), port), network);
+        } catch (IOException e) {
+            Log.i(TAG, "Can't send packet to IPv6", e);
+        }
+    }
 }
\ No newline at end of file
diff --git a/service/mdns/com/android/server/connectivity/mdns/MdnsAdvertiser.java b/service/mdns/com/android/server/connectivity/mdns/MdnsAdvertiser.java
index 185fac1..4e40efe 100644
--- a/service/mdns/com/android/server/connectivity/mdns/MdnsAdvertiser.java
+++ b/service/mdns/com/android/server/connectivity/mdns/MdnsAdvertiser.java
@@ -395,6 +395,7 @@
      */
     public void removeService(int id) {
         checkThread();
+        if (!mRegistrations.contains(id)) return;
         if (DBG) {
             Log.i(TAG, "Removing service with ID " + id);
         }
diff --git a/service/mdns/com/android/server/connectivity/mdns/MdnsAnnouncer.java b/service/mdns/com/android/server/connectivity/mdns/MdnsAnnouncer.java
index 91e08a8..7c84323 100644
--- a/service/mdns/com/android/server/connectivity/mdns/MdnsAnnouncer.java
+++ b/service/mdns/com/android/server/connectivity/mdns/MdnsAnnouncer.java
@@ -22,10 +22,8 @@
 
 import com.android.internal.annotations.VisibleForTesting;
 
-import java.net.SocketAddress;
 import java.util.Collections;
 import java.util.List;
-import java.util.function.Supplier;
 
 /**
  * Sends mDns announcements when a service registration changes and at regular intervals.
@@ -40,14 +38,12 @@
     @NonNull
     private final String mLogTag;
 
-    static class AnnouncementInfo implements MdnsPacketRepeater.Request {
+    /** Announcement request to send with {@link MdnsAnnouncer}. */
+    public static class AnnouncementInfo implements MdnsPacketRepeater.Request {
         @NonNull
         private final MdnsPacket mPacket;
-        @NonNull
-        private final Supplier<Iterable<SocketAddress>> mDestinationsSupplier;
 
-        AnnouncementInfo(List<MdnsRecord> announcedRecords, List<MdnsRecord> additionalRecords,
-                Supplier<Iterable<SocketAddress>> destinationsSupplier) {
+        AnnouncementInfo(List<MdnsRecord> announcedRecords, List<MdnsRecord> additionalRecords) {
             // Records to announce (as answers)
             // Records to place in the "Additional records", with NSEC negative responses
             // to mark records that have been verified unique
@@ -57,7 +53,6 @@
                     announcedRecords,
                     Collections.emptyList() /* authorityRecords */,
                     additionalRecords);
-            mDestinationsSupplier = destinationsSupplier;
         }
 
         @Override
@@ -66,11 +61,6 @@
         }
 
         @Override
-        public Iterable<SocketAddress> getDestinations(int index) {
-            return mDestinationsSupplier.get();
-        }
-
-        @Override
         public long getDelayMs(int nextIndex) {
             // Delay is doubled for each announcement
             return ANNOUNCEMENT_INITIAL_DELAY_MS << (nextIndex - 1);
diff --git a/service/mdns/com/android/server/connectivity/mdns/MdnsDiscoveryManager.java b/service/mdns/com/android/server/connectivity/mdns/MdnsDiscoveryManager.java
index 0f3c23a..cc6b98b 100644
--- a/service/mdns/com/android/server/connectivity/mdns/MdnsDiscoveryManager.java
+++ b/service/mdns/com/android/server/connectivity/mdns/MdnsDiscoveryManager.java
@@ -34,18 +34,18 @@
  * This class keeps tracking the set of registered {@link MdnsServiceBrowserListener} instances, and
  * notify them when a mDNS service instance is found, updated, or removed?
  */
-public class MdnsDiscoveryManager implements MdnsSocketClient.Callback {
+public class MdnsDiscoveryManager implements MdnsSocketClientBase.Callback {
     private static final String TAG = MdnsDiscoveryManager.class.getSimpleName();
     public static final boolean DBG = Log.isLoggable(TAG, Log.DEBUG);
     private static final MdnsLogger LOGGER = new MdnsLogger("MdnsDiscoveryManager");
 
     private final ExecutorProvider executorProvider;
-    private final MdnsSocketClient socketClient;
+    private final MdnsSocketClientBase socketClient;
 
     private final Map<String, MdnsServiceTypeClient> serviceTypeClients = new ArrayMap<>();
 
-    public MdnsDiscoveryManager(
-            @NonNull ExecutorProvider executorProvider, @NonNull MdnsSocketClient socketClient) {
+    public MdnsDiscoveryManager(@NonNull ExecutorProvider executorProvider,
+            @NonNull MdnsSocketClientBase socketClient) {
         this.executorProvider = executorProvider;
         this.socketClient = socketClient;
     }
@@ -76,12 +76,16 @@
                 return;
             }
         }
+        // Request the network for discovery.
+        socketClient.notifyNetworkRequested(listener, searchOptions.getNetwork());
+
         // All listeners of the same service types shares the same MdnsServiceTypeClient.
         MdnsServiceTypeClient serviceTypeClient = serviceTypeClients.get(serviceType);
         if (serviceTypeClient == null) {
             serviceTypeClient = createServiceTypeClient(serviceType);
             serviceTypeClients.put(serviceType, serviceTypeClient);
         }
+        // TODO(b/264634275): Wait for a socket to be created before sending packets.
         serviceTypeClient.startSendAndReceive(listener, searchOptions);
     }
 
@@ -96,20 +100,22 @@
     public synchronized void unregisterListener(
             @NonNull String serviceType, @NonNull MdnsServiceBrowserListener listener) {
         LOGGER.log("Unregistering listener for service type: %s", serviceType);
+        if (DBG) Log.d(TAG, "Unregistering listener for serviceType:" + serviceType);
         MdnsServiceTypeClient serviceTypeClient = serviceTypeClients.get(serviceType);
         if (serviceTypeClient == null) {
             return;
         }
         if (serviceTypeClient.stopSendAndReceive(listener)) {
             // No listener is registered for the service type anymore, remove it from the list of
-          // the
-            // service type clients.
+            // the service type clients.
             serviceTypeClients.remove(serviceType);
             if (serviceTypeClients.isEmpty()) {
                 // No discovery request. Stops the socket client.
                 socketClient.stopDiscovery();
             }
         }
+        // Unrequested the network.
+        socketClient.notifyNetworkUnrequested(listener);
     }
 
     @Override
diff --git a/service/mdns/com/android/server/connectivity/mdns/MdnsInterfaceAdvertiser.java b/service/mdns/com/android/server/connectivity/mdns/MdnsInterfaceAdvertiser.java
index 644bdad..997dcbb 100644
--- a/service/mdns/com/android/server/connectivity/mdns/MdnsInterfaceAdvertiser.java
+++ b/service/mdns/com/android/server/connectivity/mdns/MdnsInterfaceAdvertiser.java
@@ -17,10 +17,17 @@
 package com.android.server.connectivity.mdns;
 
 import android.annotation.NonNull;
+import android.annotation.Nullable;
 import android.net.LinkAddress;
 import android.net.nsd.NsdServiceInfo;
+import android.os.Handler;
 import android.os.Looper;
+import android.util.Log;
 
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.server.connectivity.mdns.MdnsPacketRepeater.PacketRepeaterCallback;
+
+import java.io.IOException;
 import java.util.List;
 
 /**
@@ -28,6 +35,8 @@
  */
 public class MdnsInterfaceAdvertiser {
     private static final boolean DBG = MdnsAdvertiser.DBG;
+    @VisibleForTesting
+    public static final long EXIT_ANNOUNCEMENT_DELAY_MS = 100L;
     @NonNull
     private final String mTag;
     @NonNull
@@ -35,7 +44,12 @@
     @NonNull
     private final AnnouncingCallback mAnnouncingCallback = new AnnouncingCallback();
     @NonNull
+    private final MdnsRecordRepository mRecordRepository;
+    @NonNull
     private final Callback mCb;
+    // Callbacks are on the same looper thread, but posted to the next handler loop
+    @NonNull
+    private final Handler mCbHandler;
     @NonNull
     private final MdnsInterfaceSocket mSocket;
     @NonNull
@@ -75,10 +89,24 @@
      * Callbacks from {@link MdnsProber}.
      */
     private class ProbingCallback implements
-            MdnsPacketRepeater.PacketRepeaterCallback<MdnsProber.ProbingInfo> {
+            PacketRepeaterCallback<MdnsProber.ProbingInfo> {
         @Override
         public void onFinished(MdnsProber.ProbingInfo info) {
-            // TODO: probing finished, start announcements
+            final MdnsAnnouncer.AnnouncementInfo announcementInfo;
+            if (DBG) {
+                Log.v(mTag, "Probing finished for service " + info.getServiceId());
+            }
+            mCbHandler.post(() -> mCb.onRegisterServiceSucceeded(
+                    MdnsInterfaceAdvertiser.this, info.getServiceId()));
+            try {
+                announcementInfo = mRecordRepository.onProbingSucceeded(info);
+            } catch (IOException e) {
+                Log.e(mTag, "Error building announcements", e);
+                return;
+            }
+
+            mAnnouncer.startSending(info.getServiceId(), announcementInfo,
+                    0L /* initialDelayMs */);
         }
     }
 
@@ -86,20 +114,64 @@
      * Callbacks from {@link MdnsAnnouncer}.
      */
     private class AnnouncingCallback
-            implements MdnsPacketRepeater.PacketRepeaterCallback<MdnsAnnouncer.AnnouncementInfo> {
+            implements PacketRepeaterCallback<MdnsAnnouncer.AnnouncementInfo> {
         // TODO: implement
     }
 
+    /**
+     * Dependencies for {@link MdnsInterfaceAdvertiser}, useful for testing.
+     */
+    @VisibleForTesting
+    public static class Dependencies {
+        /** @see MdnsRecordRepository */
+        @NonNull
+        public MdnsRecordRepository makeRecordRepository(@NonNull Looper looper) {
+            return new MdnsRecordRepository(looper);
+        }
+
+        /** @see MdnsReplySender */
+        @NonNull
+        public MdnsReplySender makeReplySender(@NonNull Looper looper,
+                @NonNull MdnsInterfaceSocket socket, @NonNull byte[] packetCreationBuffer) {
+            return new MdnsReplySender(looper, socket, packetCreationBuffer);
+        }
+
+        /** @see MdnsAnnouncer */
+        public MdnsAnnouncer makeMdnsAnnouncer(@NonNull String interfaceTag, @NonNull Looper looper,
+                @NonNull MdnsReplySender replySender,
+                @Nullable PacketRepeaterCallback<MdnsAnnouncer.AnnouncementInfo> cb) {
+            return new MdnsAnnouncer(interfaceTag, looper, replySender, cb);
+        }
+
+        /** @see MdnsProber */
+        public MdnsProber makeMdnsProber(@NonNull String interfaceTag, @NonNull Looper looper,
+                @NonNull MdnsReplySender replySender,
+                @NonNull PacketRepeaterCallback<MdnsProber.ProbingInfo> cb) {
+            return new MdnsProber(interfaceTag, looper, replySender, cb);
+        }
+    }
+
     public MdnsInterfaceAdvertiser(@NonNull String logTag,
             @NonNull MdnsInterfaceSocket socket, @NonNull List<LinkAddress> initialAddresses,
             @NonNull Looper looper, @NonNull byte[] packetCreationBuffer, @NonNull Callback cb) {
+        this(logTag, socket, initialAddresses, looper, packetCreationBuffer, cb,
+                new Dependencies());
+    }
+
+    public MdnsInterfaceAdvertiser(@NonNull String logTag,
+            @NonNull MdnsInterfaceSocket socket, @NonNull List<LinkAddress> initialAddresses,
+            @NonNull Looper looper, @NonNull byte[] packetCreationBuffer, @NonNull Callback cb,
+            @NonNull Dependencies deps) {
         mTag = MdnsInterfaceAdvertiser.class.getSimpleName() + "/" + logTag;
+        mRecordRepository = deps.makeRecordRepository(looper);
+        mRecordRepository.updateAddresses(initialAddresses);
         mSocket = socket;
         mCb = cb;
-        mReplySender = new MdnsReplySender(looper, socket, packetCreationBuffer);
-        mAnnouncer = new MdnsAnnouncer(logTag, looper, mReplySender,
+        mCbHandler = new Handler(looper);
+        mReplySender = deps.makeReplySender(looper, socket, packetCreationBuffer);
+        mAnnouncer = deps.makeMdnsAnnouncer(logTag, looper, mReplySender,
                 mAnnouncingCallback);
-        mProber = new MdnsProber(logTag, looper, mReplySender, mProbingCallback);
+        mProber = deps.makeMdnsProber(logTag, looper, mReplySender, mProbingCallback);
     }
 
     /**
@@ -110,7 +182,7 @@
      * {@link #destroyNow()}.
      */
     public void start() {
-        // TODO: implement
+        // TODO: start receiving packets
     }
 
     /**
@@ -119,7 +191,17 @@
      * @throws NameConflictException There is already a service being advertised with that name.
      */
     public void addService(int id, NsdServiceInfo service) throws NameConflictException {
-        // TODO: implement
+        final int replacedExitingService = mRecordRepository.addService(id, service);
+        // Cancel announcements for the existing service. This only happens for exiting services
+        // (so cancelling exiting announcements), as per RecordRepository.addService.
+        if (replacedExitingService >= 0) {
+            if (DBG) {
+                Log.d(mTag, "Service " + replacedExitingService
+                        + " getting re-added, cancelling exit announcements");
+            }
+            mAnnouncer.stop(replacedExitingService);
+        }
+        mProber.startProbing(mRecordRepository.setServiceProbing(id));
     }
 
     /**
@@ -128,7 +210,25 @@
      * This will trigger exit announcements for the service.
      */
     public void removeService(int id) {
-        // TODO: implement
+        mProber.stop(id);
+        mAnnouncer.stop(id);
+        final MdnsAnnouncer.AnnouncementInfo exitInfo = mRecordRepository.exitService(id);
+        if (exitInfo != null) {
+            // This effectively schedules destroyNow(), as it is to be called when the exit
+            // announcement finishes if there is no service left.
+            // A non-zero exit announcement delay follows legacy mdnsresponder behavior, and is
+            // also useful to ensure that when a host receives the exit announcement, the service
+            // has been unregistered on all interfaces; so an announcement sent from interface A
+            // that was already in-flight while unregistering won't be received after the exit on
+            // interface B.
+            mAnnouncer.startSending(id, exitInfo, EXIT_ANNOUNCEMENT_DELAY_MS);
+        } else {
+            // No exit announcement necessary: remove the service immediately.
+            mRecordRepository.removeService(id);
+            if (mRecordRepository.getServicesCount() == 0) {
+                destroyNow();
+            }
+        }
     }
 
     /**
@@ -137,7 +237,9 @@
      * This causes new address records to be announced.
      */
     public void updateAddresses(@NonNull List<LinkAddress> newAddresses) {
-        // TODO: implement
+        mRecordRepository.updateAddresses(newAddresses);
+        // TODO: restart advertising, but figure out what exit messages need to be sent for the
+        // previous addresses
     }
 
     /**
@@ -146,7 +248,13 @@
      * <p>Useful when the underlying network went away. This will trigger an onDestroyed callback.
      */
     public void destroyNow() {
-        // TODO: implement
+        for (int serviceId : mRecordRepository.clearServices()) {
+            mProber.stop(serviceId);
+            mAnnouncer.stop(serviceId);
+        }
+
+        // TODO: stop receiving packets
+        mCbHandler.post(() -> mCb.onDestroyed(mSocket));
     }
 
     /**
@@ -169,7 +277,6 @@
      * Also returns false if the specified service is not registered.
      */
     public boolean isProbing(int serviceId) {
-        // TODO: implement
-        return true;
+        return mRecordRepository.isProbing(serviceId);
     }
 }
diff --git a/service/mdns/com/android/server/connectivity/mdns/MdnsInterfaceSocket.java b/service/mdns/com/android/server/connectivity/mdns/MdnsInterfaceSocket.java
index 67c893d..d1290b6 100644
--- a/service/mdns/com/android/server/connectivity/mdns/MdnsInterfaceSocket.java
+++ b/service/mdns/com/android/server/connectivity/mdns/MdnsInterfaceSocket.java
@@ -22,10 +22,15 @@
 import android.annotation.NonNull;
 import android.net.LinkAddress;
 import android.net.util.SocketUtils;
+import android.os.Handler;
+import android.os.Looper;
 import android.os.ParcelFileDescriptor;
 import android.system.ErrnoException;
+import android.system.Os;
+import android.system.OsConstants;
 import android.util.Log;
 
+import java.io.FileDescriptor;
 import java.io.IOException;
 import java.net.DatagramPacket;
 import java.net.InetSocketAddress;
@@ -41,15 +46,19 @@
  * otherwise.
  *
  * @see MulticastSocket for javadoc of each public method.
+ * @see MulticastSocket for javadoc of each public method.
  */
 public class MdnsInterfaceSocket {
     private static final String TAG = MdnsInterfaceSocket.class.getSimpleName();
     @NonNull private final MulticastSocket mMulticastSocket;
     @NonNull private final NetworkInterface mNetworkInterface;
+    @NonNull private final MulticastPacketReader mPacketReader;
+    @NonNull private final ParcelFileDescriptor mFileDescriptor;
     private boolean mJoinedIpv4 = false;
     private boolean mJoinedIpv6 = false;
 
-    public MdnsInterfaceSocket(@NonNull NetworkInterface networkInterface, int port)
+    public MdnsInterfaceSocket(@NonNull NetworkInterface networkInterface, int port,
+            @NonNull Looper looper, @NonNull byte[] packetReadBuffer)
             throws IOException {
         mNetworkInterface = networkInterface;
         mMulticastSocket = new MulticastSocket(port);
@@ -58,11 +67,19 @@
         mMulticastSocket.setNetworkInterface(networkInterface);
 
         // Bind socket to the interface for receiving from that interface only.
-        try (ParcelFileDescriptor pfd = ParcelFileDescriptor.fromDatagramSocket(mMulticastSocket)) {
-            SocketUtils.bindSocketToInterface(pfd.getFileDescriptor(), mNetworkInterface.getName());
+        mFileDescriptor = ParcelFileDescriptor.fromDatagramSocket(mMulticastSocket);
+        try {
+            final FileDescriptor fd = mFileDescriptor.getFileDescriptor();
+            final int flags = Os.fcntlInt(fd, OsConstants.F_GETFL, 0);
+            Os.fcntlInt(fd, OsConstants.F_SETFL, flags | OsConstants.SOCK_NONBLOCK);
+            SocketUtils.bindSocketToInterface(fd, mNetworkInterface.getName());
         } catch (ErrnoException e) {
             throw new IOException("Error setting socket options", e);
         }
+
+        mPacketReader = new MulticastPacketReader(networkInterface.getName(), mFileDescriptor,
+                new Handler(looper), packetReadBuffer);
+        mPacketReader.start();
     }
 
     /**
@@ -74,23 +91,14 @@
         mMulticastSocket.send(packet);
     }
 
-    /**
-     * Receives a datagram packet from this socket.
-     *
-     * <p>This method could be used on any thread.
-     */
-    public void receive(@NonNull DatagramPacket packet) throws IOException {
-        mMulticastSocket.receive(packet);
-    }
-
-    private boolean hasIpv4Address(List<LinkAddress> addresses) {
+    private static boolean hasIpv4Address(@NonNull List<LinkAddress> addresses) {
         for (LinkAddress address : addresses) {
             if (address.isIpv4()) return true;
         }
         return false;
     }
 
-    private boolean hasIpv6Address(List<LinkAddress> addresses) {
+    private static boolean hasIpv6Address(@NonNull List<LinkAddress> addresses) {
         for (LinkAddress address : addresses) {
             if (address.isIpv6()) return true;
         }
@@ -103,7 +111,7 @@
         maybeJoinIpv6(addresses);
     }
 
-    private boolean joinGroup(InetSocketAddress multicastAddress) {
+    private boolean joinGroup(@NonNull InetSocketAddress multicastAddress) {
         try {
             mMulticastSocket.joinGroup(multicastAddress, mNetworkInterface);
             return true;
@@ -114,7 +122,7 @@
         }
     }
 
-    private void maybeJoinIpv4(List<LinkAddress> addresses) {
+    private void maybeJoinIpv4(@NonNull List<LinkAddress> addresses) {
         final boolean hasAddr = hasIpv4Address(addresses);
         if (!mJoinedIpv4 && hasAddr) {
             mJoinedIpv4 = joinGroup(MULTICAST_IPV4_ADDRESS);
@@ -124,7 +132,7 @@
         }
     }
 
-    private void maybeJoinIpv6(List<LinkAddress> addresses) {
+    private void maybeJoinIpv6(@NonNull List<LinkAddress> addresses) {
         final boolean hasAddr = hasIpv6Address(addresses);
         if (!mJoinedIpv6 && hasAddr) {
             mJoinedIpv6 = joinGroup(MULTICAST_IPV6_ADDRESS);
@@ -134,26 +142,26 @@
         }
     }
 
-    /*** Destroy this socket by leaving all joined multicast groups and closing this socket. */
+    /*** Destroy the socket */
     public void destroy() {
-        if (mJoinedIpv4) {
-            try {
-                mMulticastSocket.leaveGroup(MULTICAST_IPV4_ADDRESS, mNetworkInterface);
-            } catch (IOException e) {
-                Log.e(TAG, "Error leaving IPv4 group for " + mNetworkInterface, e);
-            }
-        }
-        if (mJoinedIpv6) {
-            try {
-                mMulticastSocket.leaveGroup(MULTICAST_IPV6_ADDRESS, mNetworkInterface);
-            } catch (IOException e) {
-                Log.e(TAG, "Error leaving IPv4 group for " + mNetworkInterface, e);
-            }
+        mPacketReader.stop();
+        try {
+            mFileDescriptor.close();
+        } catch (IOException e) {
+            Log.e(TAG, "Close file descriptor failed.");
         }
         mMulticastSocket.close();
     }
 
     /**
+     * Add a handler to receive callbacks when reads the packet from socket. If the handler is
+     * already set, this is a no-op.
+     */
+    public void addPacketHandler(@NonNull MulticastPacketReader.PacketHandler handler) {
+        mPacketReader.addPacketHandler(handler);
+    }
+
+    /**
      * Returns the network interface that this socket is bound to.
      *
      * <p>This method could be used on any thread.
diff --git a/service/mdns/com/android/server/connectivity/mdns/MdnsMultinetworkSocketClient.java b/service/mdns/com/android/server/connectivity/mdns/MdnsMultinetworkSocketClient.java
new file mode 100644
index 0000000..d959065
--- /dev/null
+++ b/service/mdns/com/android/server/connectivity/mdns/MdnsMultinetworkSocketClient.java
@@ -0,0 +1,219 @@
+/*
+ * 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.connectivity.mdns;
+
+import static com.android.server.connectivity.mdns.MdnsSocketProvider.ensureRunningOnHandlerThread;
+import static com.android.server.connectivity.mdns.MdnsSocketProvider.isNetworkMatched;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.net.LinkAddress;
+import android.net.Network;
+import android.os.Handler;
+import android.os.Looper;
+import android.util.ArrayMap;
+import android.util.Log;
+
+import java.io.IOException;
+import java.net.DatagramPacket;
+import java.net.Inet4Address;
+import java.net.Inet6Address;
+import java.net.InetSocketAddress;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * The {@link MdnsMultinetworkSocketClient} manages the multinetwork socket for mDns
+ *
+ *  * <p>This class is not thread safe.
+ */
+public class MdnsMultinetworkSocketClient implements MdnsSocketClientBase {
+    private static final String TAG = MdnsMultinetworkSocketClient.class.getSimpleName();
+    private static final boolean DBG = MdnsDiscoveryManager.DBG;
+
+    @NonNull private final Handler mHandler;
+    @NonNull private final MdnsSocketProvider mSocketProvider;
+    @NonNull private final MdnsResponseDecoder mResponseDecoder;
+
+    private final Map<MdnsServiceBrowserListener, InterfaceSocketCallback> mRequestedNetworks =
+            new ArrayMap<>();
+    private final ArrayMap<MdnsInterfaceSocket, Network> mActiveNetworkSockets = new ArrayMap<>();
+    private final ArrayMap<MdnsInterfaceSocket, ReadPacketHandler> mSocketPacketHandlers =
+            new ArrayMap<>();
+    private MdnsSocketClientBase.Callback mCallback = null;
+    private int mReceivedPacketNumber = 0;
+
+    public MdnsMultinetworkSocketClient(@NonNull Looper looper,
+            @NonNull MdnsSocketProvider provider) {
+        mHandler = new Handler(looper);
+        mSocketProvider = provider;
+        mResponseDecoder = new MdnsResponseDecoder(
+                new MdnsResponseDecoder.Clock(), null /* serviceType */);
+    }
+
+    private class InterfaceSocketCallback implements MdnsSocketProvider.SocketCallback {
+        @Override
+        public void onSocketCreated(@NonNull Network network,
+                @NonNull MdnsInterfaceSocket socket, @NonNull List<LinkAddress> addresses) {
+            // The socket may be already created by other request before, try to get the stored
+            // ReadPacketHandler.
+            ReadPacketHandler handler = mSocketPacketHandlers.get(socket);
+            if (handler == null) {
+                // First request to create this socket. Initial a ReadPacketHandler for this socket.
+                handler = new ReadPacketHandler(network, socket.getInterface().getIndex());
+                mSocketPacketHandlers.put(socket, handler);
+            }
+            socket.addPacketHandler(handler);
+            mActiveNetworkSockets.put(socket, network);
+        }
+
+        @Override
+        public void onInterfaceDestroyed(@NonNull Network network,
+                @NonNull MdnsInterfaceSocket socket) {
+            mSocketPacketHandlers.remove(socket);
+            mActiveNetworkSockets.remove(socket);
+        }
+    }
+
+    private class ReadPacketHandler implements MulticastPacketReader.PacketHandler {
+        private final Network mNetwork;
+        private final int mInterfaceIndex;
+
+        ReadPacketHandler(@NonNull Network network, int interfaceIndex) {
+            mNetwork = network;
+            mInterfaceIndex = interfaceIndex;
+        }
+
+        @Override
+        public void handlePacket(byte[] recvbuf, int length, InetSocketAddress src) {
+            processResponsePacket(recvbuf, length, mInterfaceIndex, mNetwork);
+        }
+    }
+
+    /*** Set callback for receiving mDns response */
+    @Override
+    public void setCallback(@Nullable MdnsSocketClientBase.Callback callback) {
+        ensureRunningOnHandlerThread(mHandler);
+        mCallback = callback;
+    }
+
+    /***
+     * Notify that the given network is requested for mdns discovery / resolution
+     *
+     * @param listener the listener for discovery.
+     * @param network the target network for discovery. Null means discovery on all possible
+     *                interfaces.
+     */
+    @Override
+    public void notifyNetworkRequested(@NonNull MdnsServiceBrowserListener listener,
+            @Nullable Network network) {
+        ensureRunningOnHandlerThread(mHandler);
+        InterfaceSocketCallback callback = mRequestedNetworks.get(listener);
+        if (callback != null) {
+            throw new IllegalArgumentException("Can not register duplicated listener");
+        }
+
+        if (DBG) Log.d(TAG, "notifyNetworkRequested: network=" + network);
+        callback = new InterfaceSocketCallback();
+        mRequestedNetworks.put(listener, callback);
+        mSocketProvider.requestSocket(network, callback);
+    }
+
+    /*** Notify that the network is unrequested */
+    @Override
+    public void notifyNetworkUnrequested(@NonNull MdnsServiceBrowserListener listener) {
+        ensureRunningOnHandlerThread(mHandler);
+        final InterfaceSocketCallback callback = mRequestedNetworks.remove(listener);
+        if (callback == null) {
+            Log.e(TAG, "Can not be unrequested with unknown listener=" + listener);
+            return;
+        }
+        mSocketProvider.unrequestSocket(callback);
+    }
+
+    private void sendMdnsPacket(@NonNull DatagramPacket packet, @Nullable Network targetNetwork) {
+        final boolean isIpv6 = ((InetSocketAddress) packet.getSocketAddress()).getAddress()
+                instanceof Inet6Address;
+        final boolean isIpv4 = ((InetSocketAddress) packet.getSocketAddress()).getAddress()
+                instanceof Inet4Address;
+        for (int i = 0; i < mActiveNetworkSockets.size(); i++) {
+            final MdnsInterfaceSocket socket = mActiveNetworkSockets.keyAt(i);
+            final Network network = mActiveNetworkSockets.valueAt(i);
+            // Check ip capability and network before sending packet
+            if (((isIpv6 && socket.hasJoinedIpv6()) || (isIpv4 && socket.hasJoinedIpv4()))
+                    && isNetworkMatched(targetNetwork, network)) {
+                try {
+                    socket.send(packet);
+                } catch (IOException e) {
+                    Log.e(TAG, "Failed to send a mDNS packet.", e);
+                }
+            }
+        }
+    }
+
+    private void processResponsePacket(byte[] recvbuf, int length, int interfaceIndex,
+            @NonNull Network network) {
+        int packetNumber = ++mReceivedPacketNumber;
+
+        final List<MdnsResponse> responses = new ArrayList<>();
+        final int errorCode = mResponseDecoder.decode(
+                recvbuf, length, responses, interfaceIndex, network);
+        if (errorCode == MdnsResponseDecoder.SUCCESS) {
+            for (MdnsResponse response : responses) {
+                if (mCallback != null) {
+                    mCallback.onResponseReceived(response);
+                }
+            }
+        } else if (errorCode != MdnsResponseErrorCode.ERROR_NOT_RESPONSE_MESSAGE) {
+            if (mCallback != null) {
+                mCallback.onFailedToParseMdnsResponse(packetNumber, errorCode);
+            }
+        }
+    }
+
+    /** Sends a mDNS request packet that asks for multicast response. */
+    @Override
+    public void sendMulticastPacket(@NonNull DatagramPacket packet) {
+        sendMulticastPacket(packet, null /* network */);
+    }
+
+    /**
+     * Sends a mDNS request packet via given network that asks for multicast response. Null network
+     * means sending packet via all networks.
+     */
+    @Override
+    public void sendMulticastPacket(@NonNull DatagramPacket packet, @Nullable Network network) {
+        mHandler.post(() -> sendMdnsPacket(packet, network));
+    }
+
+    /** Sends a mDNS request packet that asks for unicast response. */
+    @Override
+    public void sendUnicastPacket(@NonNull DatagramPacket packet) {
+        sendUnicastPacket(packet, null /* network */);
+    }
+
+    /**
+     * Sends a mDNS request packet via given network that asks for unicast response. Null network
+     * means sending packet via all networks.
+     */
+    @Override
+    public void sendUnicastPacket(@NonNull DatagramPacket packet, @Nullable Network network) {
+        // TODO: Separate unicast packet.
+        mHandler.post(() -> sendMdnsPacket(packet, network));
+    }
+}
diff --git a/service/mdns/com/android/server/connectivity/mdns/MdnsPacketReader.java b/service/mdns/com/android/server/connectivity/mdns/MdnsPacketReader.java
index 856a2cd..aa38844 100644
--- a/service/mdns/com/android/server/connectivity/mdns/MdnsPacketReader.java
+++ b/service/mdns/com/android/server/connectivity/mdns/MdnsPacketReader.java
@@ -38,8 +38,13 @@
 
     /** Constructs a reader for the given packet. */
     public MdnsPacketReader(DatagramPacket packet) {
-        buf = packet.getData();
-        count = packet.getLength();
+        this(packet.getData(), packet.getLength());
+    }
+
+    /** Constructs a reader for the given packet. */
+    public MdnsPacketReader(byte[] buffer, int length) {
+        buf = buffer;
+        count = length;
         pos = 0;
         limit = -1;
         labelDictionary = new SparseArray<>(16);
diff --git a/service/mdns/com/android/server/connectivity/mdns/MdnsPacketRepeater.java b/service/mdns/com/android/server/connectivity/mdns/MdnsPacketRepeater.java
index 015dbd8..ae54e70 100644
--- a/service/mdns/com/android/server/connectivity/mdns/MdnsPacketRepeater.java
+++ b/service/mdns/com/android/server/connectivity/mdns/MdnsPacketRepeater.java
@@ -24,7 +24,7 @@
 import android.util.Log;
 
 import java.io.IOException;
-import java.net.SocketAddress;
+import java.net.InetSocketAddress;
 
 /**
  * A class used to send several packets at given time intervals.
@@ -32,6 +32,14 @@
  */
 public abstract class MdnsPacketRepeater<T extends MdnsPacketRepeater.Request> {
     private static final boolean DBG = MdnsAdvertiser.DBG;
+    private static final InetSocketAddress IPV4_ADDR = new InetSocketAddress(
+            MdnsConstants.getMdnsIPv4Address(), MdnsConstants.MDNS_PORT);
+    private static final InetSocketAddress IPV6_ADDR = new InetSocketAddress(
+            MdnsConstants.getMdnsIPv6Address(), MdnsConstants.MDNS_PORT);
+    private static final InetSocketAddress[] ALL_ADDRS = new InetSocketAddress[] {
+            IPV4_ADDR, IPV6_ADDR
+    };
+
     @NonNull
     private final MdnsReplySender mReplySender;
     @NonNull
@@ -70,12 +78,6 @@
         MdnsPacket getPacket(int index);
 
         /**
-         * Get a set of destinations for the packet for one iteration.
-         */
-        @NonNull
-        Iterable<SocketAddress> getDestinations(int index);
-
-        /**
          * Get the delay in milliseconds until the next packet transmission.
          */
         long getDelayMs(int nextIndex);
@@ -110,12 +112,13 @@
             }
 
             final MdnsPacket packet = request.getPacket(index);
-            final Iterable<SocketAddress> destinations = request.getDestinations(index);
             if (DBG) {
-                Log.v(getTag(), "Sending packets to " + destinations + " for iteration "
-                        + index + " out of " + request.getNumSends());
+                Log.v(getTag(), "Sending packets for iteration " + index + " out of "
+                        + request.getNumSends());
             }
-            for (SocketAddress destination : destinations) {
+            // Send to both v4 and v6 addresses; the reply sender will take care of ignoring the
+            // send when the socket has not joined the relevant group.
+            for (InetSocketAddress destination : ALL_ADDRS) {
                 try {
                     mReplySender.sendNow(packet, destination);
                 } catch (IOException e) {
diff --git a/service/mdns/com/android/server/connectivity/mdns/MdnsProber.java b/service/mdns/com/android/server/connectivity/mdns/MdnsProber.java
index db7049e..2cd9148 100644
--- a/service/mdns/com/android/server/connectivity/mdns/MdnsProber.java
+++ b/service/mdns/com/android/server/connectivity/mdns/MdnsProber.java
@@ -22,12 +22,10 @@
 import com.android.internal.annotations.VisibleForTesting;
 import com.android.net.module.util.CollectionUtils;
 
-import java.net.SocketAddress;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
-import java.util.function.Supplier;
 
 /**
  * Sends mDns probe requests to verify service records are unique on the network.
@@ -46,26 +44,21 @@
         mLogTag = MdnsProber.class.getSimpleName() + "/" + interfaceTag;
     }
 
-    static class ProbingInfo implements Request {
+    /** Probing request to send with {@link MdnsProber}. */
+    public static class ProbingInfo implements Request {
 
         private final int mServiceId;
         @NonNull
         private final MdnsPacket mPacket;
-        @NonNull
-        private final Supplier<Iterable<SocketAddress>> mDestinationsSupplier;
 
         /**
          * Create a new ProbingInfo
          * @param serviceId Service to probe for.
          * @param probeRecords Records to be probed for uniqueness.
-         * @param destinationsSupplier Supplier for the probe destinations. Will be called on the
-         *                             probe handler thread for each probe.
          */
-        ProbingInfo(int serviceId, @NonNull List<MdnsRecord> probeRecords,
-                @NonNull Supplier<Iterable<SocketAddress>> destinationsSupplier) {
+        ProbingInfo(int serviceId, @NonNull List<MdnsRecord> probeRecords) {
             mServiceId = serviceId;
             mPacket = makePacket(probeRecords);
-            mDestinationsSupplier = destinationsSupplier;
         }
 
         public int getServiceId() {
@@ -78,12 +71,6 @@
             return mPacket;
         }
 
-        @NonNull
-        @Override
-        public Iterable<SocketAddress> getDestinations(int index) {
-            return mDestinationsSupplier.get();
-        }
-
         @Override
         public long getDelayMs(int nextIndex) {
             // As per https://datatracker.ietf.org/doc/html/rfc6762#section-8.1
diff --git a/service/mdns/com/android/server/connectivity/mdns/MdnsRecordRepository.java b/service/mdns/com/android/server/connectivity/mdns/MdnsRecordRepository.java
new file mode 100644
index 0000000..bb9c751
--- /dev/null
+++ b/service/mdns/com/android/server/connectivity/mdns/MdnsRecordRepository.java
@@ -0,0 +1,393 @@
+/*
+ * 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.connectivity.mdns;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.net.LinkAddress;
+import android.net.nsd.NsdServiceInfo;
+import android.os.Looper;
+import android.util.SparseArray;
+
+import com.android.internal.annotations.VisibleForTesting;
+
+import java.io.IOException;
+import java.net.InetAddress;
+import java.net.NetworkInterface;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Enumeration;
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * A repository of records advertised through {@link MdnsInterfaceAdvertiser}.
+ *
+ * Must be used on a consistent looper thread.
+ */
+public class MdnsRecordRepository {
+    // TTLs as per RFC6762 10.
+    // TTL for records with a host name as the resource record's name (e.g., A, AAAA, HINFO) or a
+    // host name contained within the resource record's rdata (e.g., SRV, reverse mapping PTR
+    // record)
+    private static final long NAME_RECORDS_TTL_MILLIS = TimeUnit.SECONDS.toMillis(120);
+    // TTL for other records
+    private static final long NON_NAME_RECORDS_TTL_MILLIS = TimeUnit.MINUTES.toMillis(75);
+
+    // Top-level domain for link-local queries, as per RFC6762 3.
+    private static final String LOCAL_TLD = "local";
+
+    // Service type for service enumeration (RFC6763 9.)
+    private static final String[] DNS_SD_SERVICE_TYPE =
+            new String[] { "_services", "_dns-sd", "_udp", LOCAL_TLD };
+
+    // Map of service unique ID -> records for service
+    @NonNull
+    private final SparseArray<ServiceRegistration> mServices = new SparseArray<>();
+    @NonNull
+    private final Looper mLooper;
+    @NonNull
+    private String[] mDeviceHostname;
+
+    public MdnsRecordRepository(@NonNull Looper looper) {
+        this(looper, new Dependencies());
+    }
+
+    @VisibleForTesting
+    public MdnsRecordRepository(@NonNull Looper looper, @NonNull Dependencies deps) {
+        mDeviceHostname = deps.getHostname();
+        mLooper = looper;
+    }
+
+    /**
+     * Dependencies to use with {@link MdnsRecordRepository}, useful for testing.
+     */
+    @VisibleForTesting
+    public static class Dependencies {
+        /**
+         * Get a unique hostname to be used by the device.
+         */
+        @NonNull
+        public String[] getHostname() {
+            // Generate a very-probably-unique hostname. This allows minimizing possible conflicts
+            // to the point that probing for it is no longer necessary (as per RFC6762 8.1 last
+            // paragraph), and does not leak more information than what could already be obtained by
+            // looking at the mDNS packets source address.
+            // This differs from historical behavior that just used "Android.local" for many
+            // devices, creating a lot of conflicts.
+            // Having a different hostname per interface is an acceptable option as per RFC6762 14.
+            // This hostname will change every time the interface is reconnected, so this does not
+            // allow tracking the device.
+            // TODO: consider deriving a hostname from other sources, such as the IPv6 addresses
+            // (reusing the same privacy-protecting mechanics).
+            return new String[] {
+                    "Android_" + UUID.randomUUID().toString().replace("-", ""), LOCAL_TLD };
+        }
+
+        /**
+         * @see NetworkInterface#getInetAddresses().
+         */
+        @NonNull
+        public Enumeration<InetAddress> getInterfaceInetAddresses(@NonNull NetworkInterface iface) {
+            return iface.getInetAddresses();
+        }
+    }
+
+    private static class RecordInfo<T extends MdnsRecord> {
+        public final T record;
+        public final NsdServiceInfo serviceInfo;
+
+        /**
+         * Whether the name of this record is expected to be fully owned by the service or may be
+         * advertised by other hosts as well (shared).
+         */
+        public final boolean isSharedName;
+
+        /**
+         * Whether probing is still in progress for the record.
+         */
+        public boolean isProbing;
+
+        RecordInfo(NsdServiceInfo serviceInfo, T record, boolean sharedName,
+                 boolean probing) {
+            this.serviceInfo = serviceInfo;
+            this.record = record;
+            this.isSharedName = sharedName;
+            this.isProbing = probing;
+        }
+    }
+
+    private static class ServiceRegistration {
+        @NonNull
+        public final List<RecordInfo<?>> allRecords;
+        @NonNull
+        public final RecordInfo<MdnsPointerRecord> ptrRecord;
+        @NonNull
+        public final RecordInfo<MdnsServiceRecord> srvRecord;
+        @NonNull
+        public final RecordInfo<MdnsTextRecord> txtRecord;
+        @NonNull
+        public final NsdServiceInfo serviceInfo;
+
+        /**
+         * Whether the service is sending exit announcements and will be destroyed soon.
+         */
+        public boolean exiting = false;
+
+        /**
+         * Create a ServiceRegistration for dns-sd service registration (RFC6763).
+         *
+         * @param deviceHostname Hostname of the device (for the interface used)
+         * @param serviceInfo Service to advertise
+         */
+        ServiceRegistration(@NonNull String[] deviceHostname, @NonNull NsdServiceInfo serviceInfo) {
+            this.serviceInfo = serviceInfo;
+
+            final String[] serviceType = splitServiceType(serviceInfo);
+            final String[] serviceName = splitFullyQualifiedName(serviceInfo, serviceType);
+
+            // Service PTR record
+            ptrRecord = new RecordInfo<>(
+                    serviceInfo,
+                    new MdnsPointerRecord(
+                            serviceType,
+                            0L /* receiptTimeMillis */,
+                            false /* cacheFlush */,
+                            NON_NAME_RECORDS_TTL_MILLIS,
+                            serviceName),
+                    true /* sharedName */, true /* probing */);
+
+            srvRecord = new RecordInfo<>(
+                    serviceInfo,
+                    new MdnsServiceRecord(serviceName,
+                            0L /* receiptTimeMillis */,
+                            true /* cacheFlush */,
+                            NAME_RECORDS_TTL_MILLIS, 0 /* servicePriority */, 0 /* serviceWeight */,
+                            serviceInfo.getPort(),
+                            deviceHostname),
+                    false /* sharedName */, true /* probing */);
+
+            txtRecord = new RecordInfo<>(
+                    serviceInfo,
+                    new MdnsTextRecord(serviceName,
+                            0L /* receiptTimeMillis */,
+                            true /* cacheFlush */, // Service name is verified unique after probing
+                            NON_NAME_RECORDS_TTL_MILLIS,
+                            attrsToTextEntries(serviceInfo.getAttributes())),
+                    false /* sharedName */, true /* probing */);
+
+            final ArrayList<RecordInfo<?>> allRecords = new ArrayList<>(4);
+            allRecords.add(ptrRecord);
+            allRecords.add(srvRecord);
+            allRecords.add(txtRecord);
+            // Service type enumeration record (RFC6763 9.)
+            allRecords.add(new RecordInfo<>(
+                    serviceInfo,
+                    new MdnsPointerRecord(
+                            DNS_SD_SERVICE_TYPE,
+                            0L /* receiptTimeMillis */,
+                            false /* cacheFlush */,
+                            NON_NAME_RECORDS_TTL_MILLIS,
+                            serviceType),
+                    true /* sharedName */, true /* probing */));
+
+            this.allRecords = Collections.unmodifiableList(allRecords);
+        }
+
+        void setProbing(boolean probing) {
+            for (RecordInfo<?> info : allRecords) {
+                info.isProbing = probing;
+            }
+        }
+    }
+
+    /**
+     * Inform the repository of the latest interface addresses.
+     */
+    public void updateAddresses(@NonNull List<LinkAddress> newAddresses) {
+        // TODO: implement to update addresses in records
+    }
+
+    /**
+     * Add a service to the repository.
+     *
+     * This may remove/replace any existing service that used the name added but is exiting.
+     * @param serviceId A unique service ID.
+     * @param serviceInfo Service info to add.
+     * @return If the added service replaced another with a matching name (which was exiting), the
+     *         ID of the replaced service.
+     * @throws NameConflictException There is already a (non-exiting) service using the name.
+     */
+    public int addService(int serviceId, NsdServiceInfo serviceInfo) throws NameConflictException {
+        if (mServices.contains(serviceId)) {
+            throw new IllegalArgumentException(
+                    "Service ID must not be reused across registrations: " + serviceId);
+        }
+
+        final int existing = getServiceByName(serviceInfo.getServiceName());
+        // It's OK to re-add a service that is exiting
+        if (existing >= 0 && !mServices.get(existing).exiting) {
+            throw new NameConflictException(existing);
+        }
+
+        final ServiceRegistration registration = new ServiceRegistration(
+                mDeviceHostname, serviceInfo);
+        mServices.put(serviceId, registration);
+
+        // Remove existing exiting service
+        mServices.remove(existing);
+        return existing;
+    }
+
+    /**
+     * @return The ID of the service identified by its name, or -1 if none.
+     */
+    private int getServiceByName(@NonNull String serviceName) {
+        for (int i = 0; i < mServices.size(); i++) {
+            final ServiceRegistration registration = mServices.valueAt(i);
+            if (serviceName.equals(registration.serviceInfo.getServiceName())) {
+                return mServices.keyAt(i);
+            }
+        }
+        return -1;
+    }
+
+    private MdnsProber.ProbingInfo makeProbingInfo(int serviceId,
+            @NonNull MdnsServiceRecord srvRecord) {
+        final List<MdnsRecord> probingRecords = new ArrayList<>();
+        // Probe with cacheFlush cleared; it is set when announcing, as it was verified unique:
+        // RFC6762 10.2
+        probingRecords.add(new MdnsServiceRecord(srvRecord.getName(),
+                0L /* receiptTimeMillis */,
+                false /* cacheFlush */,
+                srvRecord.getTtl(),
+                srvRecord.getServicePriority(), srvRecord.getServiceWeight(),
+                srvRecord.getServicePort(),
+                srvRecord.getServiceHost()));
+
+        return new MdnsProber.ProbingInfo(serviceId, probingRecords);
+    }
+
+    private static List<MdnsServiceInfo.TextEntry> attrsToTextEntries(Map<String, byte[]> attrs) {
+        final List<MdnsServiceInfo.TextEntry> out = new ArrayList<>(attrs.size());
+        for (Map.Entry<String, byte[]> attr : attrs.entrySet()) {
+            out.add(new MdnsServiceInfo.TextEntry(attr.getKey(), attr.getValue()));
+        }
+        return out;
+    }
+
+    /**
+     * Mark a service in the repository as exiting.
+     * @param id ID of the service, used at registration time.
+     * @return The exit announcement to indicate the service was removed, or null if not necessary.
+     */
+    @Nullable
+    public MdnsAnnouncer.AnnouncementInfo exitService(int id) {
+        final ServiceRegistration registration = mServices.get(id);
+        if (registration == null) return null;
+        if (registration.exiting) return null;
+
+        registration.exiting = true;
+
+        // TODO: implement
+        return null;
+    }
+
+    /**
+     * Remove a service from the repository
+     */
+    public void removeService(int id) {
+        mServices.remove(id);
+    }
+
+    /**
+     * @return The number of services currently held in the repository, including exiting services.
+     */
+    public int getServicesCount() {
+        return mServices.size();
+    }
+
+    /**
+     * Remove all services from the repository
+     * @return IDs of the removed services
+     */
+    @NonNull
+    public int[] clearServices() {
+        final int[] ret = new int[mServices.size()];
+        for (int i = 0; i < mServices.size(); i++) {
+            ret[i] = mServices.keyAt(i);
+        }
+        mServices.clear();
+        return ret;
+    }
+
+    /**
+     * Called to indicate that probing succeeded for a service.
+     * @param probeSuccessInfo The successful probing info.
+     * @return The {@link MdnsAnnouncer.AnnouncementInfo} to send, now that probing has succeeded.
+     */
+    public MdnsAnnouncer.AnnouncementInfo onProbingSucceeded(
+            MdnsProber.ProbingInfo probeSuccessInfo) throws IOException {
+        // TODO: implement: set service as not probing anymore and generate announcements
+        throw new IOException("Announcements not implemented");
+    }
+
+    /**
+     * (Re)set a service to the probing state.
+     * @return The {@link MdnsProber.ProbingInfo} to send for probing.
+     */
+    @Nullable
+    public MdnsProber.ProbingInfo setServiceProbing(int serviceId) {
+        final ServiceRegistration registration = mServices.get(serviceId);
+        if (registration == null) return null;
+
+        registration.setProbing(true);
+        return makeProbingInfo(serviceId, registration.srvRecord.record);
+    }
+
+    /**
+     * Indicates whether a given service is in probing state.
+     */
+    public boolean isProbing(int serviceId) {
+        final ServiceRegistration registration = mServices.get(serviceId);
+        if (registration == null) return false;
+
+        return registration.srvRecord.isProbing;
+    }
+
+    private static String[] splitFullyQualifiedName(
+            @NonNull NsdServiceInfo info, @NonNull String[] serviceType) {
+        final String[] split = new String[serviceType.length + 1];
+        split[0] = info.getServiceName();
+        System.arraycopy(serviceType, 0, split, 1, serviceType.length);
+
+        return split;
+    }
+
+    private static String[] splitServiceType(@NonNull NsdServiceInfo info) {
+        // String.split(pattern, 0) removes trailing empty strings, which would appear when
+        // splitting "domain.name." (with a dot a the end), so this is what is needed here.
+        final String[] split = info.getServiceType().split("\\.", 0);
+        final String[] type = new String[split.length + 1];
+        System.arraycopy(split, 0, type, 0, split.length);
+        type[split.length] = LOCAL_TLD;
+
+        return type;
+    }
+}
diff --git a/service/mdns/com/android/server/connectivity/mdns/MdnsReplySender.java b/service/mdns/com/android/server/connectivity/mdns/MdnsReplySender.java
index adf6f4d..c6b8f47 100644
--- a/service/mdns/com/android/server/connectivity/mdns/MdnsReplySender.java
+++ b/service/mdns/com/android/server/connectivity/mdns/MdnsReplySender.java
@@ -21,8 +21,10 @@
 
 import java.io.IOException;
 import java.net.DatagramPacket;
+import java.net.Inet4Address;
+import java.net.Inet6Address;
+import java.net.InetSocketAddress;
 import java.net.MulticastSocket;
-import java.net.SocketAddress;
 
 /**
  * A class that handles sending mDNS replies to a {@link MulticastSocket}, possibly queueing them
@@ -50,11 +52,16 @@
      *
      * Must be called on the looper thread used by the {@link MdnsReplySender}.
      */
-    public void sendNow(@NonNull MdnsPacket packet, @NonNull SocketAddress destination)
+    public void sendNow(@NonNull MdnsPacket packet, @NonNull InetSocketAddress destination)
             throws IOException {
         if (Thread.currentThread() != mLooper.getThread()) {
             throw new IllegalStateException("sendNow must be called in the handler thread");
         }
+        if (!((destination.getAddress() instanceof Inet6Address && mSocket.hasJoinedIpv6())
+                || (destination.getAddress() instanceof Inet4Address && mSocket.hasJoinedIpv4()))) {
+            // Skip sending if the socket has not joined the v4/v6 group (there was no address)
+            return;
+        }
 
         // TODO: support packets over size (send in multiple packets with TC bit set)
         final MdnsPacketWriter writer = new MdnsPacketWriter(mPacketCreationBuffer);
diff --git a/service/mdns/com/android/server/connectivity/mdns/MdnsResponseDecoder.java b/service/mdns/com/android/server/connectivity/mdns/MdnsResponseDecoder.java
index 7cf84f6..50f2069 100644
--- a/service/mdns/com/android/server/connectivity/mdns/MdnsResponseDecoder.java
+++ b/service/mdns/com/android/server/connectivity/mdns/MdnsResponseDecoder.java
@@ -101,7 +101,24 @@
      */
     public int decode(@NonNull DatagramPacket packet, @NonNull List<MdnsResponse> responses,
             int interfaceIndex, @Nullable Network network) {
-        MdnsPacketReader reader = new MdnsPacketReader(packet);
+        return decode(packet.getData(), packet.getLength(), responses, interfaceIndex, network);
+    }
+
+    /**
+     * Decodes all mDNS responses for the desired service type from a packet. The class does not
+     * check
+     * the responses for completeness; the caller should do that.
+     *
+     * @param recvbuf The received data buffer to read from.
+     * @param length The length of received data buffer.
+     * @param interfaceIndex the network interface index (or {@link
+     *     MdnsSocket#INTERFACE_INDEX_UNSPECIFIED} if not known) at which the packet was received
+     * @param network the network at which the packet was received, or null if it is unknown.
+     * @return A list of mDNS responses, or null if the packet contained no appropriate responses.
+     */
+    public int decode(@NonNull byte[] recvbuf, int length, @NonNull List<MdnsResponse> responses,
+            int interfaceIndex, @Nullable Network network) {
+        MdnsPacketReader reader = new MdnsPacketReader(recvbuf, length);
 
         List<MdnsRecord> records;
         try {
diff --git a/service/mdns/com/android/server/connectivity/mdns/MdnsResponseErrorCode.java b/service/mdns/com/android/server/connectivity/mdns/MdnsResponseErrorCode.java
index fcf9058..73a7e3a 100644
--- a/service/mdns/com/android/server/connectivity/mdns/MdnsResponseErrorCode.java
+++ b/service/mdns/com/android/server/connectivity/mdns/MdnsResponseErrorCode.java
@@ -35,4 +35,6 @@
     public static final int ERROR_READING_TXT_RDATA = 10;
     public static final int ERROR_SKIPPING_UNKNOWN_RECORD = 11;
     public static final int ERROR_END_OF_FILE = 12;
+    public static final int ERROR_READING_NSEC_RDATA = 13;
+    public static final int ERROR_READING_ANY_RDATA = 14;
 }
\ No newline at end of file
diff --git a/service/mdns/com/android/server/connectivity/mdns/MdnsServiceTypeClient.java b/service/mdns/com/android/server/connectivity/mdns/MdnsServiceTypeClient.java
index 538f376..d26fbdb 100644
--- a/service/mdns/com/android/server/connectivity/mdns/MdnsServiceTypeClient.java
+++ b/service/mdns/com/android/server/connectivity/mdns/MdnsServiceTypeClient.java
@@ -20,6 +20,7 @@
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
+import android.net.Network;
 import android.os.SystemClock;
 import android.text.TextUtils;
 import android.util.ArraySet;
@@ -52,7 +53,7 @@
 
     private final String serviceType;
     private final String[] serviceTypeLabels;
-    private final MdnsSocketClient socketClient;
+    private final MdnsSocketClientBase socketClient;
     private final ScheduledExecutorService executor;
     private final Object lock = new Object();
     private final Set<MdnsServiceBrowserListener> listeners = new ArraySet<>();
@@ -77,11 +78,11 @@
      * Constructor of {@link MdnsServiceTypeClient}.
      *
      * @param socketClient Sends and receives mDNS packet.
-     * @param executor     A {@link ScheduledExecutorService} used to schedule query tasks.
+     * @param executor         A {@link ScheduledExecutorService} used to schedule query tasks.
      */
     public MdnsServiceTypeClient(
             @NonNull String serviceType,
-            @NonNull MdnsSocketClient socketClient,
+            @NonNull MdnsSocketClientBase socketClient,
             @NonNull ScheduledExecutorService executor) {
         this.serviceType = serviceType;
         this.socketClient = socketClient;
@@ -169,7 +170,8 @@
                                     new QueryTaskConfig(
                                             searchOptions.getSubtypes(),
                                             searchOptions.isPassiveMode(),
-                                            ++currentSessionId)));
+                                            ++currentSessionId,
+                                            searchOptions.getNetwork())));
         }
     }
 
@@ -322,9 +324,10 @@
         private int burstCounter;
         private int timeToRunNextTaskInMs;
         private boolean isFirstBurst;
+        @Nullable private final Network network;
 
         QueryTaskConfig(@NonNull Collection<String> subtypes, boolean usePassiveMode,
-                long sessionId) {
+                long sessionId, @Nullable Network network) {
             this.usePassiveMode = usePassiveMode;
             this.subtypes = new ArrayList<>(subtypes);
             this.queriesPerBurst = QUERIES_PER_BURST;
@@ -346,6 +349,7 @@
                 // doubles until it maxes out at TIME_BETWEEN_BURSTS_MS.
                 this.timeBetweenBurstsInMs = INITIAL_TIME_BETWEEN_BURSTS_MS;
             }
+            this.network = network;
         }
 
         QueryTaskConfig getConfigForNextRun() {
@@ -405,7 +409,8 @@
                                 serviceType,
                                 config.subtypes,
                                 config.expectUnicastResponse,
-                                config.transactionId)
+                                config.transactionId,
+                                config.network)
                                 .call();
             } catch (RuntimeException e) {
                 LOGGER.e(String.format("Failed to run EnqueueMdnsQueryCallable for subtype: %s",
diff --git a/service/mdns/com/android/server/connectivity/mdns/MdnsSocket.java b/service/mdns/com/android/server/connectivity/mdns/MdnsSocket.java
index 64c4495..5fd1354 100644
--- a/service/mdns/com/android/server/connectivity/mdns/MdnsSocket.java
+++ b/service/mdns/com/android/server/connectivity/mdns/MdnsSocket.java
@@ -40,9 +40,9 @@
     private static final MdnsLogger LOGGER = new MdnsLogger("MdnsSocket");
 
     static final int INTERFACE_INDEX_UNSPECIFIED = -1;
-    protected static final InetSocketAddress MULTICAST_IPV4_ADDRESS =
+    public static final InetSocketAddress MULTICAST_IPV4_ADDRESS =
             new InetSocketAddress(MdnsConstants.getMdnsIPv4Address(), MdnsConstants.MDNS_PORT);
-    protected static final InetSocketAddress MULTICAST_IPV6_ADDRESS =
+    public static final InetSocketAddress MULTICAST_IPV6_ADDRESS =
             new InetSocketAddress(MdnsConstants.getMdnsIPv6Address(), MdnsConstants.MDNS_PORT);
     private final MulticastNetworkInterfaceProvider multicastNetworkInterfaceProvider;
     private final MulticastSocket multicastSocket;
diff --git a/service/mdns/com/android/server/connectivity/mdns/MdnsSocketClient.java b/service/mdns/com/android/server/connectivity/mdns/MdnsSocketClient.java
index 6a321d1..907687e 100644
--- a/service/mdns/com/android/server/connectivity/mdns/MdnsSocketClient.java
+++ b/service/mdns/com/android/server/connectivity/mdns/MdnsSocketClient.java
@@ -16,6 +16,8 @@
 
 package com.android.server.connectivity.mdns;
 
+import static com.android.server.connectivity.mdns.MdnsSocketClientBase.Callback;
+
 import android.Manifest.permission;
 import android.annotation.NonNull;
 import android.annotation.Nullable;
@@ -47,7 +49,7 @@
  *
  * <p>See https://tools.ietf.org/html/rfc6763 (namely sections 4 and 5).
  */
-public class MdnsSocketClient {
+public class MdnsSocketClient implements MdnsSocketClientBase {
 
     private static final String TAG = "MdnsClient";
     // TODO: The following values are copied from cast module. We need to think about the
@@ -116,11 +118,13 @@
         }
     }
 
+    @Override
     public synchronized void setCallback(@Nullable Callback callback) {
         this.callback = callback;
     }
 
     @RequiresPermission(permission.CHANGE_WIFI_MULTICAST_STATE)
+    @Override
     public synchronized void startDiscovery() throws IOException {
         if (multicastSocket != null) {
             LOGGER.w("Discovery is already in progress.");
@@ -160,6 +164,7 @@
     }
 
     @RequiresPermission(permission.CHANGE_WIFI_MULTICAST_STATE)
+    @Override
     public void stopDiscovery() {
         LOGGER.log("Stop discovery.");
         if (multicastSocket == null && unicastSocket == null) {
@@ -195,11 +200,13 @@
     }
 
     /** Sends a mDNS request packet that asks for multicast response. */
+    @Override
     public void sendMulticastPacket(@NonNull DatagramPacket packet) {
         sendMdnsPacket(packet, multicastPacketQueue);
     }
 
     /** Sends a mDNS request packet that asks for unicast response. */
+    @Override
     public void sendUnicastPacket(DatagramPacket packet) {
         if (useSeparateSocketForUnicast) {
             sendMdnsPacket(packet, unicastPacketQueue);
@@ -512,11 +519,4 @@
     public boolean isOnIPv6OnlyNetwork() {
         return multicastSocket != null && multicastSocket.isOnIPv6OnlyNetwork();
     }
-
-    /** Callback for {@link MdnsSocketClient}. */
-    public interface Callback {
-        void onResponseReceived(@NonNull MdnsResponse response);
-
-        void onFailedToParseMdnsResponse(int receivedPacketNumber, int errorCode);
-    }
 }
\ No newline at end of file
diff --git a/service/mdns/com/android/server/connectivity/mdns/MdnsSocketClientBase.java b/service/mdns/com/android/server/connectivity/mdns/MdnsSocketClientBase.java
new file mode 100644
index 0000000..23504a0
--- /dev/null
+++ b/service/mdns/com/android/server/connectivity/mdns/MdnsSocketClientBase.java
@@ -0,0 +1,80 @@
+/*
+ * Copyright (C) 2021 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.net.Network;
+
+import java.io.IOException;
+import java.net.DatagramPacket;
+
+/**
+ * Base class for multicast socket client.
+ *
+ * @hide
+ */
+public interface MdnsSocketClientBase {
+    /*** Start mDns discovery on given network. */
+    default void startDiscovery() throws IOException { }
+
+    /*** Stop mDns discovery. */
+    default void stopDiscovery() { }
+
+    /*** Set callback for receiving mDns response */
+    void setCallback(@Nullable Callback callback);
+
+    /*** Sends a mDNS request packet that asks for multicast response. */
+    void sendMulticastPacket(@NonNull DatagramPacket packet);
+
+    /**
+     * Sends a mDNS request packet via given network that asks for multicast response. Null network
+     * means sending packet via all networks.
+     */
+    default void sendMulticastPacket(@NonNull DatagramPacket packet, @Nullable Network network) {
+        throw new UnsupportedOperationException(
+                "This socket client doesn't support per-network sending");
+    }
+
+    /*** Sends a mDNS request packet that asks for unicast response. */
+    void sendUnicastPacket(@NonNull DatagramPacket packet);
+
+    /**
+     * Sends a mDNS request packet via given network that asks for unicast response. Null network
+     * means sending packet via all networks.
+     */
+    default void sendUnicastPacket(@NonNull DatagramPacket packet, @Nullable Network network) {
+        throw new UnsupportedOperationException(
+                "This socket client doesn't support per-network sending");
+    }
+
+    /*** Notify that the given network is requested for mdns discovery / resolution */
+    default void notifyNetworkRequested(@NonNull MdnsServiceBrowserListener listener,
+            @Nullable Network network) { }
+
+    /*** Notify that the network is unrequested */
+    default void notifyNetworkUnrequested(@NonNull MdnsServiceBrowserListener listener) { }
+
+    /*** Callback for mdns response  */
+    interface Callback {
+        /*** Receive a mdns response */
+        void onResponseReceived(@NonNull MdnsResponse response);
+
+        /*** Parse a mdns response failed */
+        void onFailedToParseMdnsResponse(int receivedPacketNumber, int errorCode);
+    }
+}
diff --git a/service/mdns/com/android/server/connectivity/mdns/MdnsSocketProvider.java b/service/mdns/com/android/server/connectivity/mdns/MdnsSocketProvider.java
index d3bf060..9298852 100644
--- a/service/mdns/com/android/server/connectivity/mdns/MdnsSocketProvider.java
+++ b/service/mdns/com/android/server/connectivity/mdns/MdnsSocketProvider.java
@@ -35,6 +35,7 @@
 import android.util.Log;
 
 import com.android.internal.annotations.VisibleForTesting;
+import com.android.net.module.util.CollectionUtils;
 import com.android.net.module.util.LinkPropertiesUtils.CompareResult;
 import com.android.net.module.util.ip.NetlinkMonitor;
 import com.android.net.module.util.netlink.NetlinkConstants;
@@ -42,7 +43,6 @@
 import com.android.server.connectivity.mdns.util.MdnsLogger;
 
 import java.io.IOException;
-import java.net.InterfaceAddress;
 import java.net.NetworkInterface;
 import java.net.SocketException;
 import java.util.ArrayList;
@@ -60,8 +60,13 @@
 public class MdnsSocketProvider {
     private static final String TAG = MdnsSocketProvider.class.getSimpleName();
     private static final boolean DBG = MdnsDiscoveryManager.DBG;
+    // This buffer size matches what MdnsSocketClient uses currently.
+    // But 1440 should generally be enough because of standard Ethernet.
+    // Note: mdnsresponder mDNSEmbeddedAPI.h uses 8940 for Ethernet jumbo frames.
+    private static final int READ_BUFFER_SIZE = 2048;
     private static final MdnsLogger LOGGER = new MdnsLogger(TAG);
     @NonNull private final Context mContext;
+    @NonNull private final Looper mLooper;
     @NonNull private final Handler mHandler;
     @NonNull private final Dependencies mDependencies;
     @NonNull private final NetworkCallback mNetworkCallback;
@@ -75,6 +80,7 @@
             new ArrayMap<>();
     private final List<String> mLocalOnlyInterfaces = new ArrayList<>();
     private final List<String> mTetheredInterfaces = new ArrayList<>();
+    private final byte[] mPacketReadBuffer = new byte[READ_BUFFER_SIZE];
     private boolean mMonitoringSockets = false;
 
     public MdnsSocketProvider(@NonNull Context context, @NonNull Looper looper) {
@@ -84,6 +90,7 @@
     MdnsSocketProvider(@NonNull Context context, @NonNull Looper looper,
             @NonNull Dependencies deps) {
         mContext = context;
+        mLooper = looper;
         mHandler = new Handler(looper);
         mDependencies = deps;
         mNetworkCallback = new NetworkCallback() {
@@ -119,32 +126,33 @@
     @VisibleForTesting
     public static class Dependencies {
         /*** Get network interface by given interface name */
-        public NetworkInterfaceWrapper getNetworkInterfaceByName(String interfaceName)
+        public NetworkInterfaceWrapper getNetworkInterfaceByName(@NonNull String interfaceName)
                 throws SocketException {
             final NetworkInterface ni = NetworkInterface.getByName(interfaceName);
             return ni == null ? null : new NetworkInterfaceWrapper(ni);
         }
 
         /*** Check whether given network interface can support mdns */
-        public boolean canScanOnInterface(NetworkInterfaceWrapper networkInterface) {
+        public boolean canScanOnInterface(@NonNull NetworkInterfaceWrapper networkInterface) {
             return MulticastNetworkInterfaceProvider.canScanOnInterface(networkInterface);
         }
 
         /*** Create a MdnsInterfaceSocket */
-        public MdnsInterfaceSocket createMdnsInterfaceSocket(NetworkInterface networkInterface,
-                int port) throws IOException {
-            return new MdnsInterfaceSocket(networkInterface, port);
+        public MdnsInterfaceSocket createMdnsInterfaceSocket(
+                @NonNull NetworkInterface networkInterface, int port, @NonNull Looper looper,
+                @NonNull byte[] packetReadBuffer) throws IOException {
+            return new MdnsInterfaceSocket(networkInterface, port, looper, packetReadBuffer);
         }
     }
 
     /*** Data class for storing socket related info  */
     private static class SocketInfo {
         final MdnsInterfaceSocket mSocket;
-        final List<LinkAddress> mAddresses = new ArrayList<>();
+        final List<LinkAddress> mAddresses;
 
         SocketInfo(MdnsInterfaceSocket socket, List<LinkAddress> addresses) {
             mSocket = socket;
-            mAddresses.addAll(addresses);
+            mAddresses = new ArrayList<>(addresses);
         }
     }
 
@@ -160,8 +168,9 @@
         }
     }
 
-    private void ensureRunningOnHandlerThread() {
-        if (mHandler.getLooper().getThread() != Thread.currentThread()) {
+    /*** Ensure that current running thread is same as given handler thread */
+    public static void ensureRunningOnHandlerThread(Handler handler) {
+        if (handler.getLooper().getThread() != Thread.currentThread()) {
             throw new IllegalStateException(
                     "Not running on Handler thread: " + Thread.currentThread().getName());
         }
@@ -169,7 +178,7 @@
 
     /*** Start monitoring sockets by listening callbacks for sockets creation or removal */
     public void startMonitoringSockets() {
-        ensureRunningOnHandlerThread();
+        ensureRunningOnHandlerThread(mHandler);
         if (mMonitoringSockets) {
             Log.d(TAG, "Already monitoring sockets.");
             return;
@@ -188,7 +197,7 @@
 
     /*** Stop monitoring sockets and unregister callbacks */
     public void stopMonitoringSockets() {
-        ensureRunningOnHandlerThread();
+        ensureRunningOnHandlerThread(mHandler);
         if (!mMonitoringSockets) {
             Log.d(TAG, "Monitoring sockets hasn't been started.");
             return;
@@ -204,19 +213,15 @@
         mMonitoringSockets = false;
     }
 
-    private static boolean isNetworkMatched(@Nullable Network targetNetwork,
+    /*** Check whether the target network is matched current network */
+    public static boolean isNetworkMatched(@Nullable Network targetNetwork,
             @NonNull Network currentNetwork) {
         return targetNetwork == null || targetNetwork.equals(currentNetwork);
     }
 
     private boolean matchRequestedNetwork(Network network) {
-        for (int i = 0; i < mCallbacksToRequestedNetworks.size(); i++) {
-            final Network requestedNetwork =  mCallbacksToRequestedNetworks.valueAt(i);
-            if (isNetworkMatched(requestedNetwork, network)) {
-                return true;
-            }
-        }
-        return false;
+        return hasAllNetworksRequest()
+                || mCallbacksToRequestedNetworks.containsValue(network);
     }
 
     private boolean hasAllNetworksRequest() {
@@ -279,15 +284,6 @@
         current.addAll(updated);
     }
 
-    private static List<LinkAddress> getLinkAddressFromNetworkInterface(
-            NetworkInterfaceWrapper networkInterface) {
-        List<LinkAddress> addresses = new ArrayList<>();
-        for (InterfaceAddress address : networkInterface.getInterfaceAddresses()) {
-            addresses.add(new LinkAddress(address));
-        }
-        return addresses;
-    }
-
     private void createSocket(Network network, LinkProperties lp) {
         final String interfaceName = lp.getInterfaceName();
         if (interfaceName == null) {
@@ -307,10 +303,12 @@
                         + " with interfaceName:" + interfaceName);
             }
             final MdnsInterfaceSocket socket = mDependencies.createMdnsInterfaceSocket(
-                    networkInterface.getNetworkInterface(), MdnsConstants.MDNS_PORT);
+                    networkInterface.getNetworkInterface(), MdnsConstants.MDNS_PORT, mLooper,
+                    mPacketReadBuffer);
             final List<LinkAddress> addresses;
             if (network.netId == INetd.LOCAL_NET_ID) {
-                addresses = getLinkAddressFromNetworkInterface(networkInterface);
+                addresses = CollectionUtils.map(
+                        networkInterface.getInterfaceAddresses(), LinkAddress::new);
                 mTetherInterfaceSockets.put(interfaceName, new SocketInfo(socket, addresses));
             } else {
                 addresses = lp.getLinkAddresses();
@@ -402,7 +400,7 @@
      * @param cb the callback to listen the socket creation.
      */
     public void requestSocket(@Nullable Network network, @NonNull SocketCallback cb) {
-        ensureRunningOnHandlerThread();
+        ensureRunningOnHandlerThread(mHandler);
         mCallbacksToRequestedNetworks.put(cb, network);
         if (network == null) {
             // Does not specify a required network, create sockets for all possible
@@ -425,7 +423,7 @@
 
     /*** Unrequest the socket */
     public void unrequestSocket(@NonNull SocketCallback cb) {
-        ensureRunningOnHandlerThread();
+        ensureRunningOnHandlerThread(mHandler);
         mCallbacksToRequestedNetworks.remove(cb);
         if (hasAllNetworksRequest()) {
             // Still has a request for all networks (interfaces).
@@ -434,16 +432,24 @@
 
         // Check if remaining requests are matched any of sockets.
         for (int i = mNetworkSockets.size() - 1; i >= 0; i--) {
-            if (matchRequestedNetwork(mNetworkSockets.keyAt(i))) continue;
-            mNetworkSockets.removeAt(i).mSocket.destroy();
+            final Network network = mNetworkSockets.keyAt(i);
+            if (matchRequestedNetwork(network)) continue;
+            final SocketInfo info = mNetworkSockets.removeAt(i);
+            info.mSocket.destroy();
+            // Still notify to unrequester for socket destroy.
+            cb.onInterfaceDestroyed(network, info.mSocket);
         }
 
         // Remove all sockets for tethering interface because these sockets do not have associated
         // networks, and they should invoke by a request for all networks (interfaces). If there is
         // no such request, the sockets for tethering interface should be removed.
         for (int i = mTetherInterfaceSockets.size() - 1; i >= 0; i--) {
-            mTetherInterfaceSockets.removeAt(i).mSocket.destroy();
+            final SocketInfo info = mTetherInterfaceSockets.valueAt(i);
+            info.mSocket.destroy();
+            // Still notify to unrequester for socket destroy.
+            cb.onInterfaceDestroyed(new Network(INetd.LOCAL_NET_ID), info.mSocket);
         }
+        mTetherInterfaceSockets.clear();
     }
 
     /*** Callbacks for listening socket changes */
diff --git a/service/mdns/com/android/server/connectivity/mdns/MulticastPacketReader.java b/service/mdns/com/android/server/connectivity/mdns/MulticastPacketReader.java
new file mode 100644
index 0000000..20cc47f
--- /dev/null
+++ b/service/mdns/com/android/server/connectivity/mdns/MulticastPacketReader.java
@@ -0,0 +1,111 @@
+/*
+ * 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.connectivity.mdns;
+
+import static com.android.server.connectivity.mdns.MdnsSocketProvider.ensureRunningOnHandlerThread;
+
+import android.annotation.NonNull;
+import android.os.Handler;
+import android.os.ParcelFileDescriptor;
+import android.system.Os;
+import android.util.ArraySet;
+
+import com.android.net.module.util.FdEventsReader;
+
+import java.io.FileDescriptor;
+import java.net.InetSocketAddress;
+import java.util.Set;
+
+/** Simple reader for mDNS packets. */
+public class MulticastPacketReader extends FdEventsReader<MulticastPacketReader.RecvBuffer> {
+    @NonNull
+    private final String mLogTag;
+    @NonNull
+    private final ParcelFileDescriptor mSocket;
+    @NonNull
+    private final Handler mHandler;
+    @NonNull
+    private final Set<PacketHandler> mPacketHandlers = new ArraySet<>();
+
+    interface PacketHandler {
+        void handlePacket(byte[] recvbuf, int length, InetSocketAddress src);
+    }
+
+    public static final class RecvBuffer {
+        final byte[] data;
+        final InetSocketAddress src;
+
+        private RecvBuffer(byte[] data, InetSocketAddress src) {
+            this.data = data;
+            this.src = src;
+        }
+    }
+
+    /**
+     * Create a new {@link MulticastPacketReader}.
+     * @param socket Socket to read from. This will *not* be closed when the reader terminates.
+     * @param buffer Buffer to read packets into. Will only be used from the handler thread.
+     */
+    protected MulticastPacketReader(@NonNull String interfaceTag,
+            @NonNull ParcelFileDescriptor socket, @NonNull Handler handler,
+            @NonNull byte[] buffer) {
+        super(handler, new RecvBuffer(buffer, new InetSocketAddress()));
+        mLogTag = MulticastPacketReader.class.getSimpleName() + "/" + interfaceTag;
+        mSocket = socket;
+        mHandler = handler;
+    }
+
+    @Override
+    protected int recvBufSize(@NonNull RecvBuffer buffer) {
+        return buffer.data.length;
+    }
+
+    @Override
+    protected FileDescriptor createFd() {
+        // Keep a reference to the PFD as it would close the fd in its finalizer otherwise
+        return mSocket.getFileDescriptor();
+    }
+
+    @Override
+    protected void onStop() {
+        // Do nothing (do not close the FD)
+    }
+
+    @Override
+    protected int readPacket(@NonNull FileDescriptor fd, @NonNull RecvBuffer buffer)
+            throws Exception {
+        return Os.recvfrom(
+                fd, buffer.data, 0, buffer.data.length, 0 /* flags */, buffer.src);
+    }
+
+    @Override
+    protected void handlePacket(@NonNull RecvBuffer recvbuf, int length) {
+        for (PacketHandler handler : mPacketHandlers) {
+            handler.handlePacket(recvbuf.data, length, recvbuf.src);
+        }
+    }
+
+    /**
+     * Add a packet handler to deal with received packets. If the handler is already set,
+     * this is a no-op.
+     */
+    public void addPacketHandler(@NonNull PacketHandler handler) {
+        ensureRunningOnHandlerThread(mHandler);
+        mPacketHandlers.add(handler);
+    }
+}
+
diff --git a/service/src/com/android/server/ConnectivityService.java b/service/src/com/android/server/ConnectivityService.java
index 8107be3..a7e6a2e 100755
--- a/service/src/com/android/server/ConnectivityService.java
+++ b/service/src/com/android/server/ConnectivityService.java
@@ -242,6 +242,8 @@
 import android.util.SparseArray;
 import android.util.SparseIntArray;
 
+import androidx.annotation.RequiresApi;
+
 import com.android.connectivity.resources.R;
 import com.android.internal.annotations.GuardedBy;
 import com.android.internal.annotations.VisibleForTesting;
@@ -262,6 +264,10 @@
 import com.android.net.module.util.PermissionUtils;
 import com.android.net.module.util.TcUtils;
 import com.android.net.module.util.netlink.InetDiagMessage;
+import com.android.networkstack.apishim.BroadcastOptionsShimImpl;
+import com.android.networkstack.apishim.ConstantsShim;
+import com.android.networkstack.apishim.common.BroadcastOptionsShim;
+import com.android.networkstack.apishim.common.UnsupportedApiLevelException;
 import com.android.server.connectivity.AutodestructReference;
 import com.android.server.connectivity.CarrierPrivilegeAuthenticator;
 import com.android.server.connectivity.ClatCoordinator;
@@ -372,6 +378,10 @@
     private static final int DEFAULT_LINGER_DELAY_MS = 30_000;
     private static final int DEFAULT_NASCENT_DELAY_MS = 5_000;
 
+    // Delimiter used when creating the broadcast delivery group for sending
+    // CONNECTIVITY_ACTION broadcast.
+    private static final char DELIVERY_GROUP_KEY_DELIMITER = ';';
+
     // The maximum value for the blocking validation result, in milliseconds.
     public static final int MAX_VALIDATION_IGNORE_AFTER_ROAM_TIME_MS = 10000;
 
@@ -1411,6 +1421,16 @@
                         + ", ingress=true, PRIO_POLICE, ETH_P_ALL) failure: ", e);
             }
         }
+
+        /**
+         * Wraps {@link BroadcastOptionsShimImpl#newInstance(BroadcastOptions)}
+         */
+        // TODO: when available in all active branches:
+        //  @RequiresApi(Build.VERSION_CODES.UPSIDE_DOWN_CAKE)
+        @RequiresApi(Build.VERSION_CODES.CUR_DEVELOPMENT)
+        public BroadcastOptionsShim makeBroadcastOptionsShim(BroadcastOptions options) {
+            return BroadcastOptionsShimImpl.newInstance(options);
+        }
     }
 
     public ConnectivityService(Context context) {
@@ -3037,6 +3057,7 @@
                         ConnectivityManager.EXTRA_NETWORK_INFO);
                 final BroadcastOptions opts = BroadcastOptions.makeBasic();
                 opts.setMaxManifestReceiverApiLevel(Build.VERSION_CODES.M);
+                applyMostRecentPolicyForConnectivityAction(opts, ni);
                 options = opts.toBundle();
                 intent.addFlags(Intent.FLAG_RECEIVER_VISIBLE_TO_INSTANT_APPS);
             }
@@ -3048,6 +3069,32 @@
         }
     }
 
+    private void applyMostRecentPolicyForConnectivityAction(BroadcastOptions options,
+            NetworkInfo info) {
+        // Delivery group policy APIs are only available on U+.
+        if (!SdkLevel.isAtLeastU()) return;
+
+        final BroadcastOptionsShim optsShim = mDeps.makeBroadcastOptionsShim(options);
+        try {
+            // This allows us to discard older broadcasts still waiting to be delivered
+            // which have the same namespace and key.
+            optsShim.setDeliveryGroupPolicy(ConstantsShim.DELIVERY_GROUP_POLICY_MOST_RECENT);
+            optsShim.setDeliveryGroupMatchingKey(ConnectivityManager.CONNECTIVITY_ACTION,
+                    createDeliveryGroupKeyForConnectivityAction(info));
+        } catch (UnsupportedApiLevelException e) {
+            Log.wtf(TAG, "Using unsupported API" + e);
+        }
+    }
+
+    @VisibleForTesting
+    static String createDeliveryGroupKeyForConnectivityAction(NetworkInfo info) {
+        final StringBuilder sb = new StringBuilder();
+        sb.append(info.getType()).append(DELIVERY_GROUP_KEY_DELIMITER);
+        sb.append(info.getSubtype()).append(DELIVERY_GROUP_KEY_DELIMITER);
+        sb.append(info.getExtraInfo());
+        return sb.toString();
+    }
+
     /**
      * Called by SystemServer through ConnectivityManager when the system is ready.
      */
diff --git a/tests/cts/net/src/android/net/cts/RateLimitTest.java b/tests/cts/net/src/android/net/cts/RateLimitTest.java
index 28cec1a..36b98fc 100644
--- a/tests/cts/net/src/android/net/cts/RateLimitTest.java
+++ b/tests/cts/net/src/android/net/cts/RateLimitTest.java
@@ -301,29 +301,32 @@
     public void testIngressRateLimit_testLimit() throws Exception {
         assumeKernelSupport();
 
+        // These tests are not very precise, especially on lower-end devices.
+        // Add 30% tolerance to reduce test flakiness. Burst size is constant at 128KiB.
+        final double toleranceFactor = 1.3;
+
         // If this value is too low, this test might become flaky because of the burst value that
         // allows to send at a higher data rate for a short period of time. The faster the data rate
         // and the longer the test, the less this test will be affected.
         final long dataLimitInBytesPerSecond = 2_000_000; // 2MB/s
         long resultInBytesPerSecond = runIngressDataRateMeasurement(Duration.ofSeconds(1));
         assertGreaterThan("Failed initial test with rate limit disabled", resultInBytesPerSecond,
-                dataLimitInBytesPerSecond);
+                (long) (dataLimitInBytesPerSecond * toleranceFactor));
 
         // enable rate limit and wait until the tc filter is installed before starting the test.
         ConnectivitySettingsManager.setIngressRateLimitInBytesPerSecond(mContext,
                 dataLimitInBytesPerSecond);
         waitForTcPoliceFilterInstalled(Duration.ofSeconds(1));
 
-        resultInBytesPerSecond = runIngressDataRateMeasurement(Duration.ofSeconds(10));
-        // Add 10% tolerance to reduce test flakiness. Burst size is constant at 128KiB.
+        resultInBytesPerSecond = runIngressDataRateMeasurement(Duration.ofSeconds(15));
         assertLessThan("Failed test with rate limit enabled", resultInBytesPerSecond,
-                (long) (dataLimitInBytesPerSecond * 1.1));
+                (long) (dataLimitInBytesPerSecond * toleranceFactor));
 
         ConnectivitySettingsManager.setIngressRateLimitInBytesPerSecond(mContext, -1);
 
         resultInBytesPerSecond = runIngressDataRateMeasurement(Duration.ofSeconds(1));
         assertGreaterThan("Failed test with rate limit disabled", resultInBytesPerSecond,
-                dataLimitInBytesPerSecond);
+                (long) (dataLimitInBytesPerSecond * toleranceFactor));
     }
 
     @Test
diff --git a/tests/unit/java/android/net/IpSecTransformTest.java b/tests/unit/java/android/net/IpSecTransformTest.java
index ec59064..8bc1bbd 100644
--- a/tests/unit/java/android/net/IpSecTransformTest.java
+++ b/tests/unit/java/android/net/IpSecTransformTest.java
@@ -143,8 +143,9 @@
 
     @Test
     @DevSdkIgnoreRule.IgnoreUpTo(Build.VERSION_CODES.TIRAMISU)
-    public void testStartMigration() throws Exception {
-        mIpSecManager.startMigration(buildTestTransform(), SRC_ADDRESS_V6, DST_ADDRESS_V6);
+    public void testStartTransformMigration() throws Exception {
+        mIpSecManager.startTunnelModeTransformMigration(
+                buildTestTransform(), SRC_ADDRESS_V6, DST_ADDRESS_V6);
         verify(mMockIpSecService)
                 .migrateTransform(
                         anyInt(),
@@ -155,9 +156,10 @@
 
     @Test
     @DevSdkIgnoreRule.IgnoreAfter(Build.VERSION_CODES.TIRAMISU)
-    public void testStartMigrationOnSdkBeforeU() throws Exception {
+    public void testStartTransformMigrationOnSdkBeforeU() throws Exception {
         try {
-            mIpSecManager.startMigration(buildTestTransform(), SRC_ADDRESS_V6, DST_ADDRESS_V6);
+            mIpSecManager.startTunnelModeTransformMigration(
+                    buildTestTransform(), SRC_ADDRESS_V6, DST_ADDRESS_V6);
             fail("Expect to fail since migration is not supported before U");
         } catch (UnsupportedOperationException expected) {
         }
diff --git a/tests/unit/java/com/android/server/ConnectivityServiceTest.java b/tests/unit/java/com/android/server/ConnectivityServiceTest.java
index ca6a14b..7d64c26 100755
--- a/tests/unit/java/com/android/server/ConnectivityServiceTest.java
+++ b/tests/unit/java/com/android/server/ConnectivityServiceTest.java
@@ -151,6 +151,7 @@
 import static com.android.server.ConnectivityService.PREFERENCE_ORDER_OEM;
 import static com.android.server.ConnectivityService.PREFERENCE_ORDER_PROFILE;
 import static com.android.server.ConnectivityService.PREFERENCE_ORDER_VPN;
+import static com.android.server.ConnectivityService.createDeliveryGroupKeyForConnectivityAction;
 import static com.android.server.ConnectivityServiceTestUtils.transportToLegacyType;
 import static com.android.server.NetworkAgentWrapper.CallbackType.OnQosCallbackRegister;
 import static com.android.server.NetworkAgentWrapper.CallbackType.OnQosCallbackUnregister;
@@ -210,6 +211,7 @@
 import android.annotation.Nullable;
 import android.app.AlarmManager;
 import android.app.AppOpsManager;
+import android.app.BroadcastOptions;
 import android.app.NotificationManager;
 import android.app.PendingIntent;
 import android.app.admin.DevicePolicyManager;
@@ -360,6 +362,8 @@
 import com.android.net.module.util.NetworkMonitorUtils;
 import com.android.networkstack.apishim.ConstantsShim;
 import com.android.networkstack.apishim.NetworkAgentConfigShimImpl;
+import com.android.networkstack.apishim.common.BroadcastOptionsShim;
+import com.android.networkstack.apishim.common.UnsupportedApiLevelException;
 import com.android.server.ConnectivityService.ConnectivityDiagnosticsCallbackInfo;
 import com.android.server.ConnectivityService.NetworkRequestInfo;
 import com.android.server.ConnectivityServiceTest.ConnectivityServiceDependencies.ReportedInterfaces;
@@ -574,6 +578,7 @@
     @Mock BpfNetMaps mBpfNetMaps;
     @Mock CarrierPrivilegeAuthenticator mCarrierPrivilegeAuthenticator;
     @Mock TetheringManager mTetheringManager;
+    @Mock BroadcastOptionsShim mBroadcastOptionsShim;
 
     // BatteryStatsManager is final and cannot be mocked with regular mockito, so just mock the
     // underlying binder calls.
@@ -821,6 +826,25 @@
             // null should not pass the test
             return null;
         }
+
+        @Override
+        public void sendStickyBroadcast(Intent intent, Bundle options) {
+            // Verify that delivery group policy APIs were used on U.
+            if (SdkLevel.isAtLeastU() && CONNECTIVITY_ACTION.equals(intent.getAction())) {
+                final NetworkInfo ni = intent.getParcelableExtra(EXTRA_NETWORK_INFO,
+                        NetworkInfo.class);
+                try {
+                    verify(mBroadcastOptionsShim).setDeliveryGroupPolicy(
+                            eq(ConstantsShim.DELIVERY_GROUP_POLICY_MOST_RECENT));
+                    verify(mBroadcastOptionsShim).setDeliveryGroupMatchingKey(
+                            eq(CONNECTIVITY_ACTION),
+                            eq(createDeliveryGroupKeyForConnectivityAction(ni)));
+                } catch (UnsupportedApiLevelException e) {
+                    throw new RuntimeException(e);
+                }
+            }
+            super.sendStickyBroadcast(intent, options);
+        }
     }
 
     // This was only added in the T SDK, but this test needs to build against the R+S SDKs, too.
@@ -2053,6 +2077,12 @@
             assertNotEquals(-1L, (long) mActiveRateLimit.getOrDefault(iface, -1L));
             mActiveRateLimit.put(iface, -1L);
         }
+
+        @Override
+        public BroadcastOptionsShim makeBroadcastOptionsShim(BroadcastOptions options) {
+            reset(mBroadcastOptionsShim);
+            return mBroadcastOptionsShim;
+        }
     }
 
     private static void initAlarmManager(final AlarmManager am, final Handler alarmHandler) {
@@ -17353,4 +17383,14 @@
         waitForIdle();
         verify(mMockNetd).interfaceSetMtu(eq(ifaceName2), eq(mtu));
     }
+
+    @Test
+    public void testCreateDeliveryGroupKeyForConnectivityAction() throws Exception {
+        final NetworkInfo info = new NetworkInfo(0 /* type */, 2 /* subtype */,
+                "MOBILE" /* typeName */, "LTE" /* subtypeName */);
+        assertEquals("0;2;null", createDeliveryGroupKeyForConnectivityAction(info));
+
+        info.setExtraInfo("test_info");
+        assertEquals("0;2;test_info", createDeliveryGroupKeyForConnectivityAction(info));
+    }
 }
diff --git a/tests/unit/java/com/android/server/connectivity/mdns/MdnsAnnouncerTest.kt b/tests/unit/java/com/android/server/connectivity/mdns/MdnsAnnouncerTest.kt
index 2051e0c..961f0f0 100644
--- a/tests/unit/java/com/android/server/connectivity/mdns/MdnsAnnouncerTest.kt
+++ b/tests/unit/java/com/android/server/connectivity/mdns/MdnsAnnouncerTest.kt
@@ -27,7 +27,6 @@
 import java.net.DatagramPacket
 import java.net.Inet6Address
 import java.net.InetAddress
-import java.net.InetSocketAddress
 import kotlin.test.assertEquals
 import kotlin.test.assertTrue
 import org.junit.After
@@ -37,6 +36,7 @@
 import org.mockito.ArgumentCaptor
 import org.mockito.Mockito.any
 import org.mockito.Mockito.atLeast
+import org.mockito.Mockito.doReturn
 import org.mockito.Mockito.mock
 import org.mockito.Mockito.timeout
 import org.mockito.Mockito.verify
@@ -46,9 +46,6 @@
 private const val NEXT_ANNOUNCES_DELAY = 1L
 private const val TEST_TIMEOUT_MS = 1000L
 
-private val destinationsSupplier = {
-    listOf(InetSocketAddress(MdnsConstants.getMdnsIPv6Address(), MdnsConstants.MDNS_PORT)) }
-
 @RunWith(DevSdkIgnoreRunner::class)
 @IgnoreUpTo(Build.VERSION_CODES.S_V2)
 class MdnsAnnouncerTest {
@@ -59,6 +56,7 @@
 
     @Before
     fun setUp() {
+        doReturn(true).`when`(socket).hasJoinedIpv6()
         thread.start()
     }
 
@@ -70,7 +68,7 @@
     private class TestAnnouncementInfo(
         announcedRecords: List<MdnsRecord>,
         additionalRecords: List<MdnsRecord>
-    ) : AnnouncementInfo(announcedRecords, additionalRecords, destinationsSupplier) {
+    ) : AnnouncementInfo(announcedRecords, additionalRecords) {
         override fun getDelayMs(nextIndex: Int) =
                 if (nextIndex < FIRST_ANNOUNCES_COUNT) {
                     FIRST_ANNOUNCES_DELAY
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 3e3c3bf..83e7696 100644
--- a/tests/unit/java/com/android/server/connectivity/mdns/MdnsDiscoveryManagerTests.java
+++ b/tests/unit/java/com/android/server/connectivity/mdns/MdnsDiscoveryManagerTests.java
@@ -46,7 +46,7 @@
     private static final String SERVICE_TYPE_2 = "_test._tcp.local";
 
     @Mock private ExecutorProvider executorProvider;
-    @Mock private MdnsSocketClient socketClient;
+    @Mock private MdnsSocketClientBase socketClient;
     @Mock private MdnsServiceTypeClient mockServiceTypeClientOne;
     @Mock private MdnsServiceTypeClient mockServiceTypeClientTwo;
 
diff --git a/tests/unit/java/com/android/server/connectivity/mdns/MdnsInterfaceAdvertiserTest.kt b/tests/unit/java/com/android/server/connectivity/mdns/MdnsInterfaceAdvertiserTest.kt
new file mode 100644
index 0000000..ad22305
--- /dev/null
+++ b/tests/unit/java/com/android/server/connectivity/mdns/MdnsInterfaceAdvertiserTest.kt
@@ -0,0 +1,129 @@
+/*
+ * 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.connectivity.mdns
+
+import android.net.InetAddresses.parseNumericAddress
+import android.net.LinkAddress
+import android.net.nsd.NsdServiceInfo
+import android.os.Build
+import android.os.HandlerThread
+import com.android.server.connectivity.mdns.MdnsAnnouncer.AnnouncementInfo
+import com.android.server.connectivity.mdns.MdnsInterfaceAdvertiser.EXIT_ANNOUNCEMENT_DELAY_MS
+import com.android.server.connectivity.mdns.MdnsPacketRepeater.PacketRepeaterCallback
+import com.android.server.connectivity.mdns.MdnsProber.ProbingInfo
+import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo
+import com.android.testutils.DevSdkIgnoreRunner
+import com.android.testutils.waitForIdle
+import org.junit.After
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.mockito.ArgumentCaptor
+import org.mockito.Mockito.any
+import org.mockito.Mockito.anyInt
+import org.mockito.Mockito.doReturn
+import org.mockito.Mockito.mock
+import org.mockito.Mockito.verify
+
+private const val LOG_TAG = "testlogtag"
+private const val TIMEOUT_MS = 10_000L
+
+private val TEST_ADDRS = listOf(LinkAddress(parseNumericAddress("2001:db8::123"), 64))
+private val TEST_BUFFER = ByteArray(1300)
+
+private const val TEST_SERVICE_ID_1 = 42
+private val TEST_SERVICE_1 = NsdServiceInfo().apply {
+    serviceType = "_testservice._tcp"
+    serviceName = "MyTestService"
+    port = 12345
+}
+
+@RunWith(DevSdkIgnoreRunner::class)
+@IgnoreUpTo(Build.VERSION_CODES.S_V2)
+class MdnsInterfaceAdvertiserTest {
+    private val socket = mock(MdnsInterfaceSocket::class.java)
+    private val thread = HandlerThread(MdnsInterfaceAdvertiserTest::class.simpleName)
+    private val cb = mock(MdnsInterfaceAdvertiser.Callback::class.java)
+    private val deps = mock(MdnsInterfaceAdvertiser.Dependencies::class.java)
+    private val repository = mock(MdnsRecordRepository::class.java)
+    private val replySender = mock(MdnsReplySender::class.java)
+    private val announcer = mock(MdnsAnnouncer::class.java)
+    private val prober = mock(MdnsProber::class.java)
+    private val probeCbCaptor = ArgumentCaptor.forClass(PacketRepeaterCallback::class.java)
+            as ArgumentCaptor<PacketRepeaterCallback<ProbingInfo>>
+    private val announceCbCaptor = ArgumentCaptor.forClass(PacketRepeaterCallback::class.java)
+            as ArgumentCaptor<PacketRepeaterCallback<AnnouncementInfo>>
+
+    private val probeCb get() = probeCbCaptor.value
+    private val announceCb get() = announceCbCaptor.value
+
+    private val advertiser by lazy {
+        MdnsInterfaceAdvertiser(LOG_TAG, socket, TEST_ADDRS, thread.looper, TEST_BUFFER, cb, deps)
+    }
+
+    @Before
+    fun setUp() {
+        doReturn(repository).`when`(deps).makeRecordRepository(any())
+        doReturn(replySender).`when`(deps).makeReplySender(any(), any(), any())
+        doReturn(announcer).`when`(deps).makeMdnsAnnouncer(any(), any(), any(), any())
+        doReturn(prober).`when`(deps).makeMdnsProber(any(), any(), any(), any())
+
+        doReturn(-1).`when`(repository).addService(anyInt(), any())
+        thread.start()
+        advertiser.start()
+
+        verify(deps).makeMdnsProber(any(), any(), any(), probeCbCaptor.capture())
+        verify(deps).makeMdnsAnnouncer(any(), any(), any(), announceCbCaptor.capture())
+    }
+
+    @After
+    fun tearDown() {
+        thread.quitSafely()
+    }
+
+    @Test
+    fun testAddRemoveService() {
+        val testProbingInfo = mock(ProbingInfo::class.java)
+        doReturn(TEST_SERVICE_ID_1).`when`(testProbingInfo).serviceId
+        doReturn(testProbingInfo).`when`(repository).setServiceProbing(TEST_SERVICE_ID_1)
+
+        advertiser.addService(TEST_SERVICE_ID_1, TEST_SERVICE_1)
+        verify(repository).addService(TEST_SERVICE_ID_1, TEST_SERVICE_1)
+        verify(prober).startProbing(testProbingInfo)
+
+        // Simulate probing success: continues to announcing
+        val testAnnouncementInfo = mock(AnnouncementInfo::class.java)
+        doReturn(testAnnouncementInfo).`when`(repository).onProbingSucceeded(testProbingInfo)
+        probeCb.onFinished(testProbingInfo)
+
+        verify(announcer).startSending(TEST_SERVICE_ID_1, testAnnouncementInfo,
+                0L /* initialDelayMs */)
+
+        thread.waitForIdle(TIMEOUT_MS)
+        verify(cb).onRegisterServiceSucceeded(advertiser, TEST_SERVICE_ID_1)
+
+        // Remove the service: expect exit announcements
+        val testExitInfo = mock(AnnouncementInfo::class.java)
+        doReturn(testExitInfo).`when`(repository).exitService(TEST_SERVICE_ID_1)
+        advertiser.removeService(TEST_SERVICE_ID_1)
+
+        verify(announcer).startSending(TEST_SERVICE_ID_1, testExitInfo, EXIT_ANNOUNCEMENT_DELAY_MS)
+
+        // TODO: after exit announcements are implemented, verify that announceCb.onFinished causes
+        // cb.onDestroyed to be called.
+    }
+}
diff --git a/tests/unit/java/com/android/server/connectivity/mdns/MdnsMultinetworkSocketClientTest.java b/tests/unit/java/com/android/server/connectivity/mdns/MdnsMultinetworkSocketClientTest.java
new file mode 100644
index 0000000..9d42a65
--- /dev/null
+++ b/tests/unit/java/com/android/server/connectivity/mdns/MdnsMultinetworkSocketClientTest.java
@@ -0,0 +1,161 @@
+/*
+ * 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.connectivity.mdns;
+
+import static com.android.server.connectivity.mdns.MdnsSocketProvider.SocketCallback;
+import static com.android.server.connectivity.mdns.MulticastPacketReader.PacketHandler;
+
+import static org.junit.Assert.assertArrayEquals;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.eq;
+import static org.mockito.Mockito.timeout;
+import static org.mockito.Mockito.verify;
+
+import android.net.InetAddresses;
+import android.net.Network;
+import android.os.Build;
+import android.os.Handler;
+import android.os.HandlerThread;
+
+import com.android.net.module.util.HexDump;
+import com.android.testutils.DevSdkIgnoreRule;
+import com.android.testutils.DevSdkIgnoreRunner;
+import com.android.testutils.HandlerUtils;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+import java.io.IOException;
+import java.lang.reflect.Constructor;
+import java.net.DatagramPacket;
+import java.net.NetworkInterface;
+import java.net.SocketException;
+import java.util.List;
+
+@RunWith(DevSdkIgnoreRunner.class)
+@DevSdkIgnoreRule.IgnoreUpTo(Build.VERSION_CODES.S_V2)
+public class MdnsMultinetworkSocketClientTest {
+    private static final byte[] BUFFER = new byte[10];
+    private static final long DEFAULT_TIMEOUT = 2000L;
+    @Mock private Network mNetwork;
+    @Mock private MdnsSocketProvider mProvider;
+    @Mock private MdnsInterfaceSocket mSocket;
+    @Mock private MdnsServiceBrowserListener mListener;
+    @Mock private MdnsSocketClientBase.Callback mCallback;
+    private MdnsMultinetworkSocketClient mSocketClient;
+    private Handler mHandler;
+
+    @Before
+    public void setUp() throws SocketException {
+        MockitoAnnotations.initMocks(this);
+        final HandlerThread thread = new HandlerThread("MdnsMultinetworkSocketClientTest");
+        thread.start();
+        mHandler = new Handler(thread.getLooper());
+        mSocketClient = new MdnsMultinetworkSocketClient(thread.getLooper(), mProvider);
+        mHandler.post(() -> mSocketClient.setCallback(mCallback));
+    }
+
+    private SocketCallback expectSocketCallback() {
+        final ArgumentCaptor<SocketCallback> callbackCaptor =
+                ArgumentCaptor.forClass(SocketCallback.class);
+        mHandler.post(() -> mSocketClient.notifyNetworkRequested(mListener, mNetwork));
+        verify(mProvider, timeout(DEFAULT_TIMEOUT))
+                .requestSocket(eq(mNetwork), callbackCaptor.capture());
+        return callbackCaptor.getValue();
+    }
+
+    private NetworkInterface createEmptyNetworkInterface() {
+        try {
+            Constructor<NetworkInterface> constructor =
+                    NetworkInterface.class.getDeclaredConstructor();
+            constructor.setAccessible(true);
+            return constructor.newInstance();
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    @Test
+    public void testSendPacket() throws IOException {
+        final SocketCallback callback = expectSocketCallback();
+        final DatagramPacket ipv4Packet = new DatagramPacket(BUFFER, 0 /* offset */, BUFFER.length,
+                InetAddresses.parseNumericAddress("192.0.2.1"), 0 /* port */);
+        final DatagramPacket ipv6Packet = new DatagramPacket(BUFFER, 0 /* offset */, BUFFER.length,
+                InetAddresses.parseNumericAddress("2001:db8::"), 0 /* port */);
+        doReturn(true).when(mSocket).hasJoinedIpv4();
+        doReturn(true).when(mSocket).hasJoinedIpv6();
+        doReturn(createEmptyNetworkInterface()).when(mSocket).getInterface();
+        // Notify socket created
+        callback.onSocketCreated(mNetwork, mSocket, List.of());
+
+        // Send packet to IPv4 with target network and verify sending has been called.
+        mSocketClient.sendMulticastPacket(ipv4Packet, mNetwork);
+        HandlerUtils.waitForIdle(mHandler, DEFAULT_TIMEOUT);
+        verify(mSocket).send(ipv4Packet);
+
+        // Send packet to IPv6 without target network and verify sending has been called.
+        mSocketClient.sendMulticastPacket(ipv6Packet);
+        HandlerUtils.waitForIdle(mHandler, DEFAULT_TIMEOUT);
+        verify(mSocket).send(ipv6Packet);
+    }
+
+    @Test
+    public void testReceivePacket() {
+        final SocketCallback callback = expectSocketCallback();
+        final byte[] data = HexDump.hexStringToByteArray(
+                // scapy.raw(scapy.dns_compress(
+                //     scapy.DNS(rd=0, qr=1, aa=1, qd = None,
+                //     an =
+                //     scapy.DNSRR(type='PTR', rrname='_testtype._tcp.local',
+                //         rdata='testservice._testtype._tcp.local', rclass='IN', ttl=4500) /
+                //     scapy.DNSRRSRV(rrname='testservice._testtype._tcp.local', rclass=0x8001,
+                //         port=31234, target='Android.local', ttl=120))
+                // )).hex().upper()
+                "000084000000000200000000095F7465737474797065045F746370056C6F63616C00000C0001000011"
+                        + "94000E0B7465737473657276696365C00CC02C00218001000000780010000000007A0207"
+                        + "416E64726F6964C01B");
+
+        doReturn(createEmptyNetworkInterface()).when(mSocket).getInterface();
+        // Notify socket created
+        callback.onSocketCreated(mNetwork, mSocket, List.of());
+
+        final ArgumentCaptor<PacketHandler> handlerCaptor =
+                ArgumentCaptor.forClass(PacketHandler.class);
+        verify(mSocket).addPacketHandler(handlerCaptor.capture());
+
+        // Send the data and verify the received records.
+        final PacketHandler handler = handlerCaptor.getValue();
+        handler.handlePacket(data, data.length, null /* src */);
+        final ArgumentCaptor<MdnsResponse> responseCaptor =
+                ArgumentCaptor.forClass(MdnsResponse.class);
+        verify(mCallback).onResponseReceived(responseCaptor.capture());
+        final MdnsResponse response = responseCaptor.getValue();
+        assertTrue(response.hasPointerRecords());
+        assertArrayEquals("_testtype._tcp.local".split("\\."),
+                response.getPointerRecords().get(0).getName());
+        assertTrue(response.hasServiceRecord());
+        assertEquals("testservice", response.getServiceRecord().getServiceInstanceName());
+        assertEquals("Android.local".split("\\."),
+                response.getServiceRecord().getServiceHost());
+    }
+}
diff --git a/tests/unit/java/com/android/server/connectivity/mdns/MdnsProberTest.kt b/tests/unit/java/com/android/server/connectivity/mdns/MdnsProberTest.kt
index a98a4b2..3caa97d 100644
--- a/tests/unit/java/com/android/server/connectivity/mdns/MdnsProberTest.kt
+++ b/tests/unit/java/com/android/server/connectivity/mdns/MdnsProberTest.kt
@@ -25,7 +25,6 @@
 import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo
 import com.android.testutils.DevSdkIgnoreRunner
 import java.net.DatagramPacket
-import java.net.InetSocketAddress
 import java.util.concurrent.CompletableFuture
 import java.util.concurrent.TimeUnit
 import kotlin.test.assertEquals
@@ -37,15 +36,13 @@
 import org.mockito.ArgumentCaptor
 import org.mockito.Mockito.any
 import org.mockito.Mockito.atLeast
+import org.mockito.Mockito.doReturn
 import org.mockito.Mockito.mock
 import org.mockito.Mockito.never
 import org.mockito.Mockito.timeout
 import org.mockito.Mockito.times
 import org.mockito.Mockito.verify
 
-private val destinationsSupplier = {
-    listOf(InetSocketAddress(MdnsConstants.getMdnsIPv6Address(), MdnsConstants.MDNS_PORT)) }
-
 private const val TEST_TIMEOUT_MS = 10_000L
 private const val SHORT_TIMEOUT_MS = 200L
 
@@ -64,6 +61,7 @@
 
     @Before
     fun setUp() {
+        doReturn(true).`when`(socket).hasJoinedIpv6()
         thread.start()
     }
 
@@ -73,7 +71,7 @@
     }
 
     private class TestProbeInfo(probeRecords: List<MdnsRecord>, private val delayMs: Long = 1L) :
-            ProbingInfo(1 /* serviceId */, probeRecords, destinationsSupplier) {
+            ProbingInfo(1 /* serviceId */, probeRecords) {
         // Just send the packets quickly. Timing-related tests for MdnsPacketRepeater are already
         // done in MdnsAnnouncerTest.
         override fun getDelayMs(nextIndex: Int) = delayMs
diff --git a/tests/unit/java/com/android/server/connectivity/mdns/MdnsRecordRepositoryTest.kt b/tests/unit/java/com/android/server/connectivity/mdns/MdnsRecordRepositoryTest.kt
new file mode 100644
index 0000000..502a36a
--- /dev/null
+++ b/tests/unit/java/com/android/server/connectivity/mdns/MdnsRecordRepositoryTest.kt
@@ -0,0 +1,127 @@
+/*
+ * 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.connectivity.mdns
+
+import android.net.InetAddresses.parseNumericAddress
+import android.net.nsd.NsdServiceInfo
+import android.os.Build
+import android.os.HandlerThread
+import com.android.server.connectivity.mdns.MdnsRecordRepository.Dependencies
+import com.android.testutils.DevSdkIgnoreRule
+import com.android.testutils.DevSdkIgnoreRunner
+import java.net.NetworkInterface
+import java.util.Collections
+import kotlin.test.assertContentEquals
+import kotlin.test.assertEquals
+import kotlin.test.assertFailsWith
+import kotlin.test.assertNotNull
+import kotlin.test.assertTrue
+import org.junit.After
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+
+private const val TEST_SERVICE_ID_1 = 42
+private const val TEST_SERVICE_ID_2 = 43
+private const val TEST_PORT = 12345
+private val TEST_HOSTNAME = arrayOf("Android_000102030405060708090A0B0C0D0E0F", "local")
+private val TEST_ADDRESSES = arrayOf(
+        parseNumericAddress("192.0.2.111"),
+        parseNumericAddress("2001:db8::111"),
+        parseNumericAddress("2001:db8::222"))
+
+private val TEST_SERVICE_1 = NsdServiceInfo().apply {
+    serviceType = "_testservice._tcp"
+    serviceName = "MyTestService"
+    port = TEST_PORT
+}
+
+@RunWith(DevSdkIgnoreRunner::class)
+@DevSdkIgnoreRule.IgnoreUpTo(Build.VERSION_CODES.S_V2)
+class MdnsRecordRepositoryTest {
+    private val thread = HandlerThread(MdnsRecordRepositoryTest::class.simpleName)
+    private val deps = object : Dependencies() {
+        override fun getHostname() = TEST_HOSTNAME
+        override fun getInterfaceInetAddresses(iface: NetworkInterface) =
+                Collections.enumeration(TEST_ADDRESSES.toList())
+    }
+
+    @Before
+    fun setUp() {
+        thread.start()
+    }
+
+    @After
+    fun tearDown() {
+        thread.quitSafely()
+    }
+
+    @Test
+    fun testAddServiceAndProbe() {
+        val repository = MdnsRecordRepository(thread.looper, deps)
+        assertEquals(0, repository.servicesCount)
+        assertEquals(-1, repository.addService(TEST_SERVICE_ID_1, TEST_SERVICE_1))
+        assertEquals(1, repository.servicesCount)
+
+        val probingInfo = repository.setServiceProbing(TEST_SERVICE_ID_1)
+        assertNotNull(probingInfo)
+        assertTrue(repository.isProbing(TEST_SERVICE_ID_1))
+
+        assertEquals(TEST_SERVICE_ID_1, probingInfo.serviceId)
+        val packet = probingInfo.getPacket(0)
+
+        assertEquals(MdnsConstants.FLAGS_QUERY, packet.flags)
+        assertEquals(0, packet.answers.size)
+        assertEquals(0, packet.additionalRecords.size)
+
+        assertEquals(1, packet.questions.size)
+        val expectedName = arrayOf("MyTestService", "_testservice", "_tcp", "local")
+        assertEquals(MdnsAnyRecord(expectedName, false /* unicast */), packet.questions[0])
+
+        assertEquals(1, packet.authorityRecords.size)
+        assertEquals(MdnsServiceRecord(expectedName,
+                0L /* receiptTimeMillis */,
+                false /* cacheFlush */,
+                120_000L /* ttlMillis */,
+                0 /* servicePriority */, 0 /* serviceWeight */,
+                TEST_PORT, TEST_HOSTNAME), packet.authorityRecords[0])
+
+        assertContentEquals(intArrayOf(TEST_SERVICE_ID_1), repository.clearServices())
+    }
+
+    @Test
+    fun testAddAndConflicts() {
+        val repository = MdnsRecordRepository(thread.looper, deps)
+        repository.addService(TEST_SERVICE_ID_1, TEST_SERVICE_1)
+        assertFailsWith(NameConflictException::class) {
+            repository.addService(TEST_SERVICE_ID_2, TEST_SERVICE_1)
+        }
+    }
+
+    @Test
+    fun testExitingServiceReAdded() {
+        val repository = MdnsRecordRepository(thread.looper, deps)
+        repository.addService(TEST_SERVICE_ID_1, TEST_SERVICE_1)
+        repository.exitService(TEST_SERVICE_ID_1)
+
+        assertEquals(TEST_SERVICE_ID_1, repository.addService(TEST_SERVICE_ID_2, TEST_SERVICE_1))
+        assertEquals(1, repository.servicesCount)
+
+        repository.removeService(TEST_SERVICE_ID_2)
+        assertEquals(0, repository.servicesCount)
+    }
+}
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 697116c..a45ca68 100644
--- a/tests/unit/java/com/android/server/connectivity/mdns/MdnsServiceTypeClientTests.java
+++ b/tests/unit/java/com/android/server/connectivity/mdns/MdnsServiceTypeClientTests.java
@@ -62,7 +62,7 @@
 import java.net.DatagramPacket;
 import java.net.Inet4Address;
 import java.net.Inet6Address;
-import java.net.SocketAddress;
+import java.net.InetSocketAddress;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
@@ -80,7 +80,10 @@
     private static final int INTERFACE_INDEX = 999;
     private static final String SERVICE_TYPE = "_googlecast._tcp.local";
     private static final String[] SERVICE_TYPE_LABELS = TextUtils.split(SERVICE_TYPE, "\\.");
-    private static final Network NETWORK = mock(Network.class);
+    private static final InetSocketAddress IPV4_ADDRESS = new InetSocketAddress(
+            MdnsConstants.getMdnsIPv4Address(), MdnsConstants.MDNS_PORT);
+    private static final InetSocketAddress IPV6_ADDRESS = new InetSocketAddress(
+            MdnsConstants.getMdnsIPv6Address(), MdnsConstants.MDNS_PORT);
 
     @Mock
     private MdnsServiceBrowserListener mockListenerOne;
@@ -89,13 +92,16 @@
     @Mock
     private MdnsPacketWriter mockPacketWriter;
     @Mock
-    private MdnsSocketClient mockSocketClient;
+    private MdnsMultinetworkSocketClient mockSocketClient;
+    @Mock
+    private Network mockNetwork;
     @Captor
     private ArgumentCaptor<MdnsServiceInfo> serviceInfoCaptor;
 
     private final byte[] buf = new byte[10];
 
-    private DatagramPacket[] expectedPackets;
+    private DatagramPacket[] expectedIPv4Packets;
+    private DatagramPacket[] expectedIPv6Packets;
     private ScheduledFuture<?>[] expectedSendFutures;
     private FakeExecutor currentThreadExecutor = new FakeExecutor();
 
@@ -106,30 +112,52 @@
     public void setUp() throws IOException {
         MockitoAnnotations.initMocks(this);
 
-        expectedPackets = new DatagramPacket[16];
+        expectedIPv4Packets = new DatagramPacket[16];
+        expectedIPv6Packets = new DatagramPacket[16];
         expectedSendFutures = new ScheduledFuture<?>[16];
 
         for (int i = 0; i < expectedSendFutures.length; ++i) {
-            expectedPackets[i] = new DatagramPacket(buf, 0, 5);
+            expectedIPv4Packets[i] = new DatagramPacket(buf, 0 /* offset */, 5 /* length */,
+                    MdnsConstants.getMdnsIPv4Address(), MdnsConstants.MDNS_PORT);
+            expectedIPv6Packets[i] = new DatagramPacket(buf, 0 /* offset */, 5 /* length */,
+                    MdnsConstants.getMdnsIPv6Address(), MdnsConstants.MDNS_PORT);
             expectedSendFutures[i] = Mockito.mock(ScheduledFuture.class);
         }
-        when(mockPacketWriter.getPacket(any(SocketAddress.class)))
-                .thenReturn(expectedPackets[0])
-                .thenReturn(expectedPackets[1])
-                .thenReturn(expectedPackets[2])
-                .thenReturn(expectedPackets[3])
-                .thenReturn(expectedPackets[4])
-                .thenReturn(expectedPackets[5])
-                .thenReturn(expectedPackets[6])
-                .thenReturn(expectedPackets[7])
-                .thenReturn(expectedPackets[8])
-                .thenReturn(expectedPackets[9])
-                .thenReturn(expectedPackets[10])
-                .thenReturn(expectedPackets[11])
-                .thenReturn(expectedPackets[12])
-                .thenReturn(expectedPackets[13])
-                .thenReturn(expectedPackets[14])
-                .thenReturn(expectedPackets[15]);
+        when(mockPacketWriter.getPacket(IPV4_ADDRESS))
+                .thenReturn(expectedIPv4Packets[0])
+                .thenReturn(expectedIPv4Packets[1])
+                .thenReturn(expectedIPv4Packets[2])
+                .thenReturn(expectedIPv4Packets[3])
+                .thenReturn(expectedIPv4Packets[4])
+                .thenReturn(expectedIPv4Packets[5])
+                .thenReturn(expectedIPv4Packets[6])
+                .thenReturn(expectedIPv4Packets[7])
+                .thenReturn(expectedIPv4Packets[8])
+                .thenReturn(expectedIPv4Packets[9])
+                .thenReturn(expectedIPv4Packets[10])
+                .thenReturn(expectedIPv4Packets[11])
+                .thenReturn(expectedIPv4Packets[12])
+                .thenReturn(expectedIPv4Packets[13])
+                .thenReturn(expectedIPv4Packets[14])
+                .thenReturn(expectedIPv4Packets[15]);
+
+        when(mockPacketWriter.getPacket(IPV6_ADDRESS))
+                .thenReturn(expectedIPv6Packets[0])
+                .thenReturn(expectedIPv6Packets[1])
+                .thenReturn(expectedIPv6Packets[2])
+                .thenReturn(expectedIPv6Packets[3])
+                .thenReturn(expectedIPv6Packets[4])
+                .thenReturn(expectedIPv6Packets[5])
+                .thenReturn(expectedIPv6Packets[6])
+                .thenReturn(expectedIPv6Packets[7])
+                .thenReturn(expectedIPv6Packets[8])
+                .thenReturn(expectedIPv6Packets[9])
+                .thenReturn(expectedIPv6Packets[10])
+                .thenReturn(expectedIPv6Packets[11])
+                .thenReturn(expectedIPv6Packets[12])
+                .thenReturn(expectedIPv6Packets[13])
+                .thenReturn(expectedIPv6Packets[14])
+                .thenReturn(expectedIPv6Packets[15]);
 
         client =
                 new MdnsServiceTypeClient(SERVICE_TYPE, mockSocketClient, currentThreadExecutor) {
@@ -282,8 +310,8 @@
         //MdnsConfigsFlagsImpl.alwaysAskForUnicastResponseInEachBurst.override(true);
         MdnsSearchOptions searchOptions =
                 MdnsSearchOptions.newBuilder().addSubtype("12345").setIsPassiveMode(false).build();
-        QueryTaskConfig config =
-                new QueryTaskConfig(searchOptions.getSubtypes(), searchOptions.isPassiveMode(), 1);
+        QueryTaskConfig config = new QueryTaskConfig(
+                searchOptions.getSubtypes(), searchOptions.isPassiveMode(), 1, mockNetwork);
 
         // This is the first query. We will ask for unicast response.
         assertTrue(config.expectUnicastResponse);
@@ -311,8 +339,8 @@
     public void testQueryTaskConfig_askForUnicastInFirstQuery() {
         MdnsSearchOptions searchOptions =
                 MdnsSearchOptions.newBuilder().addSubtype("12345").setIsPassiveMode(false).build();
-        QueryTaskConfig config =
-                new QueryTaskConfig(searchOptions.getSubtypes(), searchOptions.isPassiveMode(), 1);
+        QueryTaskConfig config = new QueryTaskConfig(
+                searchOptions.getSubtypes(), searchOptions.isPassiveMode(), 1, mockNetwork);
 
         // This is the first query. We will ask for unicast response.
         assertTrue(config.expectUnicastResponse);
@@ -409,7 +437,7 @@
         MdnsResponse response = mock(MdnsResponse.class);
         when(response.getServiceInstanceName()).thenReturn("service-instance-1");
         doReturn(INTERFACE_INDEX).when(response).getInterfaceIndex();
-        doReturn(NETWORK).when(response).getNetwork();
+        doReturn(mockNetwork).when(response).getNetwork();
         when(response.isComplete()).thenReturn(false);
 
         client.processResponse(response);
@@ -423,7 +451,7 @@
                 List.of() /* subTypes */,
                 Collections.singletonMap("key", null) /* attributes */,
                 INTERFACE_INDEX,
-                NETWORK);
+                mockNetwork);
 
         verify(mockListenerOne, never()).onServiceFound(any(MdnsServiceInfo.class));
         verify(mockListenerOne, never()).onServiceUpdated(any(MdnsServiceInfo.class));
@@ -443,7 +471,7 @@
                         /* subtype= */ "ABCDE",
                         Collections.emptyMap(),
                         /* interfaceIndex= */ 20,
-                        NETWORK);
+                        mockNetwork);
         client.processResponse(initialResponse);
 
         // Process a second response with a different port and updated text attributes.
@@ -455,7 +483,7 @@
                         /* subtype= */ "ABCDE",
                         Collections.singletonMap("key", "value"),
                         /* interfaceIndex= */ 20,
-                        NETWORK);
+                        mockNetwork);
         client.processResponse(secondResponse);
 
         // Verify onServiceNameDiscovered was called once for the initial response.
@@ -469,7 +497,7 @@
                 Collections.singletonList("ABCDE") /* subTypes */,
                 Collections.singletonMap("key", null) /* attributes */,
                 20 /* interfaceIndex */,
-                NETWORK);
+                mockNetwork);
 
         // Verify onServiceFound was called once for the initial response.
         verify(mockListenerOne).onServiceFound(serviceInfoCaptor.capture());
@@ -480,7 +508,7 @@
         assertEquals(initialServiceInfo.getSubtypes(), Collections.singletonList("ABCDE"));
         assertNull(initialServiceInfo.getAttributeByKey("key"));
         assertEquals(initialServiceInfo.getInterfaceIndex(), 20);
-        assertEquals(NETWORK, initialServiceInfo.getNetwork());
+        assertEquals(mockNetwork, initialServiceInfo.getNetwork());
 
         // Verify onServiceUpdated was called once for the second response.
         verify(mockListenerOne).onServiceUpdated(serviceInfoCaptor.capture());
@@ -492,7 +520,7 @@
         assertEquals(updatedServiceInfo.getSubtypes(), Collections.singletonList("ABCDE"));
         assertEquals(updatedServiceInfo.getAttributeByKey("key"), "value");
         assertEquals(updatedServiceInfo.getInterfaceIndex(), 20);
-        assertEquals(NETWORK, updatedServiceInfo.getNetwork());
+        assertEquals(mockNetwork, updatedServiceInfo.getNetwork());
     }
 
     @Test
@@ -509,7 +537,7 @@
                         /* subtype= */ "ABCDE",
                         Collections.emptyMap(),
                         /* interfaceIndex= */ 20,
-                        NETWORK);
+                        mockNetwork);
         client.processResponse(initialResponse);
 
         // Process a second response with a different port and updated text attributes.
@@ -521,7 +549,7 @@
                         /* subtype= */ "ABCDE",
                         Collections.singletonMap("key", "value"),
                         /* interfaceIndex= */ 20,
-                        NETWORK);
+                        mockNetwork);
         client.processResponse(secondResponse);
 
         System.out.println("secondResponses ip"
@@ -538,7 +566,7 @@
                 Collections.singletonList("ABCDE") /* subTypes */,
                 Collections.singletonMap("key", null) /* attributes */,
                 20 /* interfaceIndex */,
-                NETWORK);
+                mockNetwork);
 
         // Verify onServiceFound was called once for the initial response.
         verify(mockListenerOne).onServiceFound(serviceInfoCaptor.capture());
@@ -549,7 +577,7 @@
         assertEquals(initialServiceInfo.getSubtypes(), Collections.singletonList("ABCDE"));
         assertNull(initialServiceInfo.getAttributeByKey("key"));
         assertEquals(initialServiceInfo.getInterfaceIndex(), 20);
-        assertEquals(NETWORK, initialServiceInfo.getNetwork());
+        assertEquals(mockNetwork, initialServiceInfo.getNetwork());
 
         // Verify onServiceUpdated was called once for the second response.
         verify(mockListenerOne).onServiceUpdated(serviceInfoCaptor.capture());
@@ -561,7 +589,7 @@
         assertEquals(updatedServiceInfo.getSubtypes(), Collections.singletonList("ABCDE"));
         assertEquals(updatedServiceInfo.getAttributeByKey("key"), "value");
         assertEquals(updatedServiceInfo.getInterfaceIndex(), 20);
-        assertEquals(NETWORK, updatedServiceInfo.getNetwork());
+        assertEquals(mockNetwork, updatedServiceInfo.getNetwork());
     }
 
     private void verifyServiceRemovedNoCallback(MdnsServiceBrowserListener listener) {
@@ -599,12 +627,12 @@
                         /* subtype= */ "ABCDE",
                         Collections.emptyMap(),
                         INTERFACE_INDEX,
-                        NETWORK);
+                        mockNetwork);
         client.processResponse(initialResponse);
         MdnsResponse response = mock(MdnsResponse.class);
         doReturn("goodbye-service").when(response).getServiceInstanceName();
         doReturn(INTERFACE_INDEX).when(response).getInterfaceIndex();
-        doReturn(NETWORK).when(response).getNetwork();
+        doReturn(mockNetwork).when(response).getNetwork();
         doReturn(true).when(response).isGoodbye();
         client.processResponse(response);
         // Verify removed callback won't be called if the service is not existed.
@@ -615,9 +643,9 @@
         doReturn(serviceName).when(response).getServiceInstanceName();
         client.processResponse(response);
         verifyServiceRemovedCallback(
-                mockListenerOne, serviceName, SERVICE_TYPE_LABELS, INTERFACE_INDEX, NETWORK);
+                mockListenerOne, serviceName, SERVICE_TYPE_LABELS, INTERFACE_INDEX, mockNetwork);
         verifyServiceRemovedCallback(
-                mockListenerTwo, serviceName, SERVICE_TYPE_LABELS, INTERFACE_INDEX, NETWORK);
+                mockListenerTwo, serviceName, SERVICE_TYPE_LABELS, INTERFACE_INDEX, mockNetwork);
     }
 
     @Test
@@ -631,7 +659,7 @@
                         /* subtype= */ "ABCDE",
                         Collections.emptyMap(),
                         INTERFACE_INDEX,
-                        NETWORK);
+                        mockNetwork);
         client.processResponse(initialResponse);
 
         client.startSendAndReceive(mockListenerOne, MdnsSearchOptions.getDefaultOptions());
@@ -647,7 +675,7 @@
                 Collections.singletonList("ABCDE") /* subTypes */,
                 Collections.singletonMap("key", null) /* attributes */,
                 INTERFACE_INDEX,
-                NETWORK);
+                mockNetwork);
 
         // Verify onServiceFound was called once for the existing response.
         verify(mockListenerOne).onServiceFound(serviceInfoCaptor.capture());
@@ -684,7 +712,7 @@
         MdnsResponse initialResponse =
                 createMockResponse(
                         serviceInstanceName, "192.168.1.1", 5353, List.of("ABCDE"),
-                        Map.of(), INTERFACE_INDEX, NETWORK);
+                        Map.of(), INTERFACE_INDEX, mockNetwork);
         client.processResponse(initialResponse);
 
         // Clear the scheduled runnable.
@@ -718,7 +746,7 @@
         MdnsResponse initialResponse =
                 createMockResponse(
                         serviceInstanceName, "192.168.1.1", 5353, List.of("ABCDE"),
-                        Map.of(), INTERFACE_INDEX, NETWORK);
+                        Map.of(), INTERFACE_INDEX, mockNetwork);
         client.processResponse(initialResponse);
 
         // Clear the scheduled runnable.
@@ -737,7 +765,7 @@
 
         // Verify removed callback was called.
         verifyServiceRemovedCallback(mockListenerOne, serviceInstanceName, SERVICE_TYPE_LABELS,
-                INTERFACE_INDEX, NETWORK);
+                INTERFACE_INDEX, mockNetwork);
     }
 
     @Test
@@ -758,7 +786,7 @@
         MdnsResponse initialResponse =
                 createMockResponse(
                         serviceInstanceName, "192.168.1.1", 5353, List.of("ABCDE"),
-                        Map.of(), INTERFACE_INDEX, NETWORK);
+                        Map.of(), INTERFACE_INDEX, mockNetwork);
         client.processResponse(initialResponse);
 
         // Clear the scheduled runnable.
@@ -792,7 +820,7 @@
         MdnsResponse initialResponse =
                 createMockResponse(
                         serviceInstanceName, "192.168.1.1", 5353, List.of("ABCDE"),
-                        Map.of(), INTERFACE_INDEX, NETWORK);
+                        Map.of(), INTERFACE_INDEX, mockNetwork);
         client.processResponse(initialResponse);
 
         // Clear the scheduled runnable.
@@ -804,7 +832,7 @@
 
         // Verify removed callback was called.
         verifyServiceRemovedCallback(mockListenerOne, serviceInstanceName, SERVICE_TYPE_LABELS,
-                INTERFACE_INDEX, NETWORK);
+                INTERFACE_INDEX, mockNetwork);
     }
 
     @Test
@@ -824,7 +852,7 @@
                         "ABCDE" /* subtype */,
                         Collections.emptyMap(),
                         INTERFACE_INDEX,
-                        NETWORK);
+                        mockNetwork);
         client.processResponse(initialResponse);
 
         // Process a second response which has ip address to make response become complete.
@@ -836,7 +864,7 @@
                         "ABCDE" /* subtype */,
                         Collections.emptyMap(),
                         INTERFACE_INDEX,
-                        NETWORK);
+                        mockNetwork);
         client.processResponse(secondResponse);
 
         // Process a third response with a different ip address, port and updated text attributes.
@@ -848,7 +876,7 @@
                         "ABCDE" /* subtype */,
                         Collections.singletonMap("key", "value"),
                         INTERFACE_INDEX,
-                        NETWORK);
+                        mockNetwork);
         client.processResponse(thirdResponse);
 
         // Process the last response which is goodbye message.
@@ -868,7 +896,7 @@
                 Collections.singletonList("ABCDE") /* subTypes */,
                 Collections.singletonMap("key", null) /* attributes */,
                 INTERFACE_INDEX,
-                NETWORK);
+                mockNetwork);
 
         // Verify onServiceFound was second called for the second response.
         inOrder.verify(mockListenerOne).onServiceFound(serviceInfoCaptor.capture());
@@ -881,7 +909,7 @@
                 Collections.singletonList("ABCDE") /* subTypes */,
                 Collections.singletonMap("key", null) /* attributes */,
                 INTERFACE_INDEX,
-                NETWORK);
+                mockNetwork);
 
         // Verify onServiceUpdated was third called for the third response.
         inOrder.verify(mockListenerOne).onServiceUpdated(serviceInfoCaptor.capture());
@@ -894,7 +922,7 @@
                 Collections.singletonList("ABCDE") /* subTypes */,
                 Collections.singletonMap("key", "value") /* attributes */,
                 INTERFACE_INDEX,
-                NETWORK);
+                mockNetwork);
 
         // Verify onServiceRemoved was called for the last response.
         inOrder.verify(mockListenerOne).onServiceRemoved(serviceInfoCaptor.capture());
@@ -907,7 +935,7 @@
                 Collections.singletonList("ABCDE") /* subTypes */,
                 Collections.singletonMap("key", "value") /* attributes */,
                 INTERFACE_INDEX,
-                NETWORK);
+                mockNetwork);
 
         // Verify onServiceNameRemoved was called for the last response.
         inOrder.verify(mockListenerOne).onServiceNameRemoved(serviceInfoCaptor.capture());
@@ -920,18 +948,34 @@
                 Collections.singletonList("ABCDE") /* subTypes */,
                 Collections.singletonMap("key", "value") /* attributes */,
                 INTERFACE_INDEX,
-                NETWORK);
+                mockNetwork);
     }
 
     // verifies that the right query was enqueued with the right delay, and send query by executing
     // the runnable.
     private void verifyAndSendQuery(int index, long timeInMs, boolean expectsUnicastResponse) {
+        verifyAndSendQuery(
+                index, timeInMs, expectsUnicastResponse, true /* multipleSocketDiscovery */);
+    }
+
+    private void verifyAndSendQuery(int index, long timeInMs, boolean expectsUnicastResponse,
+            boolean multipleSocketDiscovery) {
         assertEquals(currentThreadExecutor.getAndClearLastScheduledDelayInMs(), timeInMs);
         currentThreadExecutor.getAndClearLastScheduledRunnable().run();
         if (expectsUnicastResponse) {
-            verify(mockSocketClient).sendUnicastPacket(expectedPackets[index]);
+            verify(mockSocketClient).sendUnicastPacket(
+                    expectedIPv4Packets[index], null /* network */);
+            if (multipleSocketDiscovery) {
+                verify(mockSocketClient).sendUnicastPacket(
+                        expectedIPv6Packets[index], null /* network */);
+            }
         } else {
-            verify(mockSocketClient).sendMulticastPacket(expectedPackets[index]);
+            verify(mockSocketClient).sendMulticastPacket(
+                    expectedIPv4Packets[index], null /* network */);
+            if (multipleSocketDiscovery) {
+                verify(mockSocketClient).sendMulticastPacket(
+                        expectedIPv6Packets[index], null /* network */);
+            }
         }
     }
 
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 ef73030..07bbbb5 100644
--- a/tests/unit/java/com/android/server/connectivity/mdns/MdnsSocketProviderTest.java
+++ b/tests/unit/java/com/android/server/connectivity/mdns/MdnsSocketProviderTest.java
@@ -96,7 +96,7 @@
                 .getNetworkInterfaceByName(LOCAL_ONLY_IFACE_NAME);
         doReturn(mTetheredIfaceWrapper).when(mDeps).getNetworkInterfaceByName(TETHERED_IFACE_NAME);
         doReturn(mock(MdnsInterfaceSocket.class))
-                .when(mDeps).createMdnsInterfaceSocket(any(), anyInt());
+                .when(mDeps).createMdnsInterfaceSocket(any(), anyInt(), any(), any());
         final HandlerThread thread = new HandlerThread("MdnsSocketProviderTest");
         thread.start();
         mHandler = new Handler(thread.getLooper());
@@ -165,7 +165,7 @@
         }
 
         public void expectedSocketCreatedForNetwork(Network network, List<LinkAddress> addresses) {
-            final SocketEvent event = mHistory.poll(DEFAULT_TIMEOUT, c -> true);
+            final SocketEvent event = mHistory.poll(0L /* timeoutMs */, c -> true);
             assertNotNull(event);
             assertTrue(event instanceof SocketCreatedEvent);
             assertEquals(network, event.mNetwork);
@@ -173,7 +173,7 @@
         }
 
         public void expectedInterfaceDestroyedForNetwork(Network network) {
-            final SocketEvent event = mHistory.poll(DEFAULT_TIMEOUT, c -> true);
+            final SocketEvent event = mHistory.poll(0L /* timeoutMs */, c -> true);
             assertNotNull(event);
             assertTrue(event instanceof InterfaceDestroyedEvent);
             assertEquals(network, event.mNetwork);
@@ -181,7 +181,7 @@
 
         public void expectedAddressesChangedForNetwork(Network network,
                 List<LinkAddress> addresses) {
-            final SocketEvent event = mHistory.poll(DEFAULT_TIMEOUT, c -> true);
+            final SocketEvent event = mHistory.poll(0L /* timeoutMs */, c -> true);
             assertNotNull(event);
             assertTrue(event instanceof AddressesChangedEvent);
             assertEquals(network, event.mNetwork);
@@ -260,7 +260,8 @@
         HandlerUtils.waitForIdle(mHandler, DEFAULT_TIMEOUT);
         testCallback1.expectedNoCallback();
         testCallback2.expectedNoCallback();
-        testCallback3.expectedNoCallback();
+        // Expect the socket destroy for tethered interface.
+        testCallback3.expectedInterfaceDestroyedForNetwork(LOCAL_NETWORK);
     }
 
     @Test
diff --git a/tools/gn2bp/Android.bp.swp b/tools/gn2bp/Android.bp.swp
index 804c2a4..2398349 100644
--- a/tools/gn2bp/Android.bp.swp
+++ b/tools/gn2bp/Android.bp.swp
@@ -31,37 +31,36 @@
     name: "cronet_aml_api_sources",
     srcs: [
         ":cronet_aml_components_cronet_android_interface_api_version",
-        "components/cronet/android/api/src/org/chromium/net/BidirectionalStream.java",
-        "components/cronet/android/api/src/org/chromium/net/CallbackException.java",
-        "components/cronet/android/api/src/org/chromium/net/CronetEngine.java",
-        "components/cronet/android/api/src/org/chromium/net/CronetException.java",
-        "components/cronet/android/api/src/org/chromium/net/ExperimentalBidirectionalStream.java",
-        "components/cronet/android/api/src/org/chromium/net/ExperimentalCronetEngine.java",
-        "components/cronet/android/api/src/org/chromium/net/ExperimentalUrlRequest.java",
-        "components/cronet/android/api/src/org/chromium/net/ICronetEngineBuilder.java",
-        "components/cronet/android/api/src/org/chromium/net/InlineExecutionProhibitedException.java",
-        "components/cronet/android/api/src/org/chromium/net/NetworkException.java",
-        "components/cronet/android/api/src/org/chromium/net/NetworkQualityRttListener.java",
-        "components/cronet/android/api/src/org/chromium/net/NetworkQualityThroughputListener.java",
-        "components/cronet/android/api/src/org/chromium/net/QuicException.java",
-        "components/cronet/android/api/src/org/chromium/net/RequestFinishedInfo.java",
-        "components/cronet/android/api/src/org/chromium/net/UploadDataProvider.java",
-        "components/cronet/android/api/src/org/chromium/net/UploadDataProviders.java",
-        "components/cronet/android/api/src/org/chromium/net/UploadDataSink.java",
-        "components/cronet/android/api/src/org/chromium/net/UrlRequest.java",
-        "components/cronet/android/api/src/org/chromium/net/UrlResponseInfo.java",
-        "components/cronet/android/api/src/org/chromium/net/apihelpers/ByteArrayCronetCallback.java",
-        "components/cronet/android/api/src/org/chromium/net/apihelpers/ContentTypeParametersParser.java",
-        "components/cronet/android/api/src/org/chromium/net/apihelpers/CronetRequestCompletionListener.java",
-        "components/cronet/android/api/src/org/chromium/net/apihelpers/CronetResponse.java",
-        "components/cronet/android/api/src/org/chromium/net/apihelpers/ImplicitFlowControlCallback.java",
-        "components/cronet/android/api/src/org/chromium/net/apihelpers/InMemoryTransformCronetCallback.java",
-        "components/cronet/android/api/src/org/chromium/net/apihelpers/JsonCronetCallback.java",
-        "components/cronet/android/api/src/org/chromium/net/apihelpers/RedirectHandler.java",
-        "components/cronet/android/api/src/org/chromium/net/apihelpers/RedirectHandlers.java",
-        "components/cronet/android/api/src/org/chromium/net/apihelpers/StringCronetCallback.java",
-        "components/cronet/android/api/src/org/chromium/net/apihelpers/UploadDataProviders.java",
-        "components/cronet/android/api/src/org/chromium/net/apihelpers/UrlRequestCallbacks.java",
+        "components/cronet/android/api/src/android/net/http/BidirectionalStream.java",
+        "components/cronet/android/api/src/android/net/http/CallbackException.java",
+        "components/cronet/android/api/src/android/net/http/CronetEngine.java",
+        "components/cronet/android/api/src/android/net/http/CronetException.java",
+        "components/cronet/android/api/src/android/net/http/ExperimentalBidirectionalStream.java",
+        "components/cronet/android/api/src/android/net/http/ExperimentalCronetEngine.java",
+        "components/cronet/android/api/src/android/net/http/ExperimentalUrlRequest.java",
+        "components/cronet/android/api/src/android/net/http/ICronetEngineBuilder.java",
+        "components/cronet/android/api/src/android/net/http/InlineExecutionProhibitedException.java",
+        "components/cronet/android/api/src/android/net/http/NetworkException.java",
+        "components/cronet/android/api/src/android/net/http/NetworkQualityRttListener.java",
+        "components/cronet/android/api/src/android/net/http/NetworkQualityThroughputListener.java",
+        "components/cronet/android/api/src/android/net/http/QuicException.java",
+        "components/cronet/android/api/src/android/net/http/RequestFinishedInfo.java",
+        "components/cronet/android/api/src/android/net/http/UploadDataProvider.java",
+        "components/cronet/android/api/src/android/net/http/UploadDataSink.java",
+        "components/cronet/android/api/src/android/net/http/UrlRequest.java",
+        "components/cronet/android/api/src/android/net/http/UrlResponseInfo.java",
+        "components/cronet/android/api/src/android/net/http/apihelpers/ByteArrayCronetCallback.java",
+        "components/cronet/android/api/src/android/net/http/apihelpers/ContentTypeParametersParser.java",
+        "components/cronet/android/api/src/android/net/http/apihelpers/CronetRequestCompletionListener.java",
+        "components/cronet/android/api/src/android/net/http/apihelpers/CronetResponse.java",
+        "components/cronet/android/api/src/android/net/http/apihelpers/ImplicitFlowControlCallback.java",
+        "components/cronet/android/api/src/android/net/http/apihelpers/InMemoryTransformCronetCallback.java",
+        "components/cronet/android/api/src/android/net/http/apihelpers/JsonCronetCallback.java",
+        "components/cronet/android/api/src/android/net/http/apihelpers/RedirectHandler.java",
+        "components/cronet/android/api/src/android/net/http/apihelpers/RedirectHandlers.java",
+        "components/cronet/android/api/src/android/net/http/apihelpers/StringCronetCallback.java",
+        "components/cronet/android/api/src/android/net/http/apihelpers/UploadDataProviders.java",
+        "components/cronet/android/api/src/android/net/http/apihelpers/UrlRequestCallbacks.java",
     ],
 }
 
@@ -1388,7 +1387,7 @@
 cc_genrule {
     name: "cronet_aml_base_build_date",
     cmd: "$(location build/write_build_date_header.py) $(out) " +
-         "1670130000",
+         "1672549200",
     out: [
         "base/generated_build_date.h",
     ],
@@ -1534,7 +1533,7 @@
 // GN: //base:ios_cronet_buildflags
 cc_genrule {
     name: "cronet_aml_base_ios_cronet_buildflags",
-    cmd: "echo '--flags CRONET_BUILD=\"false\"' | " +
+    cmd: "echo '--flags CRONET_BUILD=\"true\"' | " +
          "$(location build/write_buildflag_header.py) --output " +
          "$(out) " +
          "--rulename " +
@@ -2365,8 +2364,6 @@
         ":cronet_aml_components_cronet_android_cronet_static",
         ":cronet_aml_components_cronet_cronet_common",
         ":cronet_aml_components_cronet_metrics_util",
-        ":cronet_aml_components_cronet_native_cronet_native_impl",
-        ":cronet_aml_components_grpc_support_grpc_support",
         ":cronet_aml_components_metrics_library_support",
         "components/cronet/android/cronet_jni.cc",
     ],
@@ -2563,7 +2560,6 @@
         "base/android/java/src/org/chromium/base/Function.java",
         "base/android/java/src/org/chromium/base/ImportantFileWriterAndroid.java",
         "base/android/java/src/org/chromium/base/IntStringCallback.java",
-        "base/android/java/src/org/chromium/base/IntentUtils.java",
         "base/android/java/src/org/chromium/base/JNIUtils.java",
         "base/android/java/src/org/chromium/base/JavaExceptionReporter.java",
         "base/android/java/src/org/chromium/base/JavaHandlerThread.java",
@@ -2657,19 +2653,6 @@
         "base/android/java/src/org/chromium/base/metrics/TimingMetric.java",
         "base/android/java/src/org/chromium/base/metrics/UmaRecorder.java",
         "base/android/java/src/org/chromium/base/metrics/UmaRecorderHolder.java",
-        "base/android/java/src/org/chromium/base/multidex/ChromiumMultiDexInstaller.java",
-        "base/android/java/src/org/chromium/base/process_launcher/BindService.java",
-        "base/android/java/src/org/chromium/base/process_launcher/ChildConnectionAllocator.java",
-        "base/android/java/src/org/chromium/base/process_launcher/ChildProcessConnection.java",
-        "base/android/java/src/org/chromium/base/process_launcher/ChildProcessConstants.java",
-        "base/android/java/src/org/chromium/base/process_launcher/ChildProcessLauncher.java",
-        "base/android/java/src/org/chromium/base/process_launcher/ChildProcessService.java",
-        "base/android/java/src/org/chromium/base/process_launcher/ChildProcessServiceDelegate.java",
-        "base/android/java/src/org/chromium/base/process_launcher/ChildServiceConnection.java",
-        "base/android/java/src/org/chromium/base/process_launcher/ChildServiceConnectionDelegate.java",
-        "base/android/java/src/org/chromium/base/process_launcher/ChildServiceConnectionFactory.java",
-        "base/android/java/src/org/chromium/base/process_launcher/ChildServiceConnectionImpl.java",
-        "base/android/java/src/org/chromium/base/process_launcher/FileDescriptorInfo.java",
         "base/android/java/src/org/chromium/base/supplier/BooleanSupplier.java",
         "base/android/java/src/org/chromium/base/supplier/DestroyableObservableSupplier.java",
         "base/android/java/src/org/chromium/base/supplier/ObservableSupplier.java",
@@ -2719,8 +2702,6 @@
         "components/cronet/android/java/src/org/chromium/net/impl/CronetUploadDataStream.java",
         "components/cronet/android/java/src/org/chromium/net/impl/CronetUrlRequest.java",
         "components/cronet/android/java/src/org/chromium/net/impl/CronetUrlRequestContext.java",
-        "components/cronet/android/java/src/org/chromium/net/impl/JavaUploadDataSinkBase.java",
-        "components/cronet/android/java/src/org/chromium/net/impl/JavaUrlRequestUtils.java",
         "components/cronet/android/java/src/org/chromium/net/impl/NativeCronetEngineBuilderImpl.java",
         "components/cronet/android/java/src/org/chromium/net/impl/NetworkExceptionImpl.java",
         "components/cronet/android/java/src/org/chromium/net/impl/NoOpLogger.java",
@@ -2832,7 +2813,6 @@
         "base/android/java/src/org/chromium/base/Function.java",
         "base/android/java/src/org/chromium/base/ImportantFileWriterAndroid.java",
         "base/android/java/src/org/chromium/base/IntStringCallback.java",
-        "base/android/java/src/org/chromium/base/IntentUtils.java",
         "base/android/java/src/org/chromium/base/JNIUtils.java",
         "base/android/java/src/org/chromium/base/JavaExceptionReporter.java",
         "base/android/java/src/org/chromium/base/JavaHandlerThread.java",
@@ -2926,19 +2906,6 @@
         "base/android/java/src/org/chromium/base/metrics/TimingMetric.java",
         "base/android/java/src/org/chromium/base/metrics/UmaRecorder.java",
         "base/android/java/src/org/chromium/base/metrics/UmaRecorderHolder.java",
-        "base/android/java/src/org/chromium/base/multidex/ChromiumMultiDexInstaller.java",
-        "base/android/java/src/org/chromium/base/process_launcher/BindService.java",
-        "base/android/java/src/org/chromium/base/process_launcher/ChildConnectionAllocator.java",
-        "base/android/java/src/org/chromium/base/process_launcher/ChildProcessConnection.java",
-        "base/android/java/src/org/chromium/base/process_launcher/ChildProcessConstants.java",
-        "base/android/java/src/org/chromium/base/process_launcher/ChildProcessLauncher.java",
-        "base/android/java/src/org/chromium/base/process_launcher/ChildProcessService.java",
-        "base/android/java/src/org/chromium/base/process_launcher/ChildProcessServiceDelegate.java",
-        "base/android/java/src/org/chromium/base/process_launcher/ChildServiceConnection.java",
-        "base/android/java/src/org/chromium/base/process_launcher/ChildServiceConnectionDelegate.java",
-        "base/android/java/src/org/chromium/base/process_launcher/ChildServiceConnectionFactory.java",
-        "base/android/java/src/org/chromium/base/process_launcher/ChildServiceConnectionImpl.java",
-        "base/android/java/src/org/chromium/base/process_launcher/FileDescriptorInfo.java",
         "base/android/java/src/org/chromium/base/supplier/BooleanSupplier.java",
         "base/android/java/src/org/chromium/base/supplier/DestroyableObservableSupplier.java",
         "base/android/java/src/org/chromium/base/supplier/ObservableSupplier.java",
@@ -2988,8 +2955,6 @@
         "components/cronet/android/java/src/org/chromium/net/impl/CronetUploadDataStream.java",
         "components/cronet/android/java/src/org/chromium/net/impl/CronetUrlRequest.java",
         "components/cronet/android/java/src/org/chromium/net/impl/CronetUrlRequestContext.java",
-        "components/cronet/android/java/src/org/chromium/net/impl/JavaUploadDataSinkBase.java",
-        "components/cronet/android/java/src/org/chromium/net/impl/JavaUrlRequestUtils.java",
         "components/cronet/android/java/src/org/chromium/net/impl/NativeCronetEngineBuilderImpl.java",
         "components/cronet/android/java/src/org/chromium/net/impl/NetworkExceptionImpl.java",
         "components/cronet/android/java/src/org/chromium/net/impl/NoOpLogger.java",
@@ -3144,9 +3109,6 @@
         "buildtools/third_party/libc++/",
         "buildtools/third_party/libc++/trunk/include",
         "buildtools/third_party/libc++abi/trunk/include",
-        "components/cronet/native/generated/",
-        "components/cronet/native/include/",
-        "components/grpc_support/include/",
         "net/third_party/quiche/overrides/",
         "net/third_party/quiche/src/",
         "net/third_party/quiche/src/quiche/common/platform/default/",
@@ -3265,7 +3227,7 @@
          "'API_LEVEL=19' " +
          "-o " +
          "$(out) " +
-         "$(location components/cronet/android/api/src/org/chromium/net/ApiVersion.template)",
+         "$(location components/cronet/android/api/src/android/net/http/ApiVersion.template)",
     out: [
         "components/cronet/android/templates/org/chromium/net/ApiVersion.java",
     ],
@@ -3274,7 +3236,7 @@
         "build/util/android_chrome_version.py",
         "build/util/version.py",
         "chrome/VERSION",
-        "components/cronet/android/api/src/org/chromium/net/ApiVersion.template",
+        "components/cronet/android/api/src/android/net/http/ApiVersion.template",
     ],
 }
 
@@ -3619,186 +3581,6 @@
     },
 }
 
-// GN: //components/cronet/native:cronet_native_impl
-cc_object {
-    name: "cronet_aml_components_cronet_native_cronet_native_impl",
-    srcs: [
-        "components/cronet/native/buffer.cc",
-        "components/cronet/native/engine.cc",
-        "components/cronet/native/generated/cronet.idl_impl_interface.cc",
-        "components/cronet/native/generated/cronet.idl_impl_struct.cc",
-        "components/cronet/native/io_buffer_with_cronet_buffer.cc",
-        "components/cronet/native/native_metrics_util.cc",
-        "components/cronet/native/runnables.cc",
-        "components/cronet/native/upload_data_sink.cc",
-        "components/cronet/native/url_request.cc",
-    ],
-    shared_libs: [
-        "libandroid",
-        "liblog",
-        "libz",
-    ],
-    static_libs: [
-        "cronet_aml_base_allocator_partition_allocator_partition_alloc",
-        "cronet_aml_base_base",
-        "cronet_aml_base_base_static",
-        "cronet_aml_base_third_party_double_conversion_double_conversion",
-        "cronet_aml_base_third_party_dynamic_annotations_dynamic_annotations",
-        "cronet_aml_components_prefs_prefs",
-        "cronet_aml_crypto_crypto",
-        "cronet_aml_net_net",
-        "cronet_aml_net_preload_decoder",
-        "cronet_aml_net_third_party_quiche_quiche",
-        "cronet_aml_net_uri_template",
-        "cronet_aml_third_party_boringssl_boringssl",
-        "cronet_aml_third_party_brotli_common",
-        "cronet_aml_third_party_brotli_dec",
-        "cronet_aml_third_party_icu_icui18n",
-        "cronet_aml_third_party_icu_icuuc_private",
-        "cronet_aml_third_party_libevent_libevent",
-        "cronet_aml_third_party_modp_b64_modp_b64",
-        "cronet_aml_third_party_protobuf_protobuf_lite",
-        "cronet_aml_url_url",
-    ],
-    generated_headers: [
-        "cronet_aml_components_cronet_cronet_buildflags",
-        "cronet_aml_components_cronet_cronet_version_header_action",
-        "cronet_aml_third_party_metrics_proto_metrics_proto_gen_headers",
-    ],
-    defaults: [
-        "cronet_aml_defaults",
-    ],
-    cflags: [
-        "-DANDROID",
-        "-DANDROID_NDK_VERSION_ROLL=r23_1",
-        "-DCR_CLANG_REVISION=\"llvmorg-16-init-6578-g0d30e92f-2\"",
-        "-DCR_LIBCXX_REVISION=64d36e572d3f9719c5d75011a718f33f11126851",
-        "-DDCHECK_ALWAYS_ON=1",
-        "-DDYNAMIC_ANNOTATIONS_ENABLED=1",
-        "-DGOOGLE_PROTOBUF_INTERNAL_DONATE_STEAL_INLINE=0",
-        "-DGOOGLE_PROTOBUF_NO_RTTI",
-        "-DGOOGLE_PROTOBUF_NO_STATIC_INITIALIZER",
-        "-DHAVE_PTHREAD",
-        "-DHAVE_SYS_UIO_H",
-        "-D_DEBUG",
-        "-D_GNU_SOURCE",
-        "-D_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS",
-        "-D_LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS",
-        "-D__STDC_CONSTANT_MACROS",
-        "-D__STDC_FORMAT_MACROS",
-    ],
-    local_include_dirs: [
-        "./",
-        "buildtools/third_party/libc++/",
-        "buildtools/third_party/libc++/trunk/include",
-        "buildtools/third_party/libc++abi/trunk/include",
-        "components/cronet/native/generated/",
-        "components/cronet/native/include/",
-        "components/grpc_support/include/",
-        "net/third_party/quiche/overrides/",
-        "net/third_party/quiche/src/",
-        "net/third_party/quiche/src/quiche/common/platform/default/",
-        "third_party/abseil-cpp/",
-        "third_party/boringssl/src/include/",
-        "third_party/protobuf/src/",
-    ],
-    cpp_std: "c++17",
-    target: {
-        android_x86: {
-            cflags: [
-                "-msse3",
-            ],
-        },
-        android_x86_64: {
-            cflags: [
-                "-msse3",
-            ],
-        },
-    },
-}
-
-// GN: //components/grpc_support:grpc_support
-cc_object {
-    name: "cronet_aml_components_grpc_support_grpc_support",
-    srcs: [
-        "components/grpc_support/bidirectional_stream.cc",
-        "components/grpc_support/bidirectional_stream_c.cc",
-    ],
-    shared_libs: [
-        "libandroid",
-        "liblog",
-        "libz",
-    ],
-    static_libs: [
-        "cronet_aml_base_allocator_partition_allocator_partition_alloc",
-        "cronet_aml_base_base",
-        "cronet_aml_base_base_static",
-        "cronet_aml_base_third_party_double_conversion_double_conversion",
-        "cronet_aml_base_third_party_dynamic_annotations_dynamic_annotations",
-        "cronet_aml_crypto_crypto",
-        "cronet_aml_net_net",
-        "cronet_aml_net_preload_decoder",
-        "cronet_aml_net_third_party_quiche_quiche",
-        "cronet_aml_net_uri_template",
-        "cronet_aml_third_party_boringssl_boringssl",
-        "cronet_aml_third_party_brotli_common",
-        "cronet_aml_third_party_brotli_dec",
-        "cronet_aml_third_party_icu_icui18n",
-        "cronet_aml_third_party_icu_icuuc_private",
-        "cronet_aml_third_party_libevent_libevent",
-        "cronet_aml_third_party_modp_b64_modp_b64",
-        "cronet_aml_third_party_protobuf_protobuf_lite",
-        "cronet_aml_url_url",
-    ],
-    defaults: [
-        "cronet_aml_defaults",
-    ],
-    cflags: [
-        "-DANDROID",
-        "-DANDROID_NDK_VERSION_ROLL=r23_1",
-        "-DCR_CLANG_REVISION=\"llvmorg-16-init-6578-g0d30e92f-2\"",
-        "-DCR_LIBCXX_REVISION=64d36e572d3f9719c5d75011a718f33f11126851",
-        "-DDCHECK_ALWAYS_ON=1",
-        "-DDYNAMIC_ANNOTATIONS_ENABLED=1",
-        "-DGOOGLE_PROTOBUF_INTERNAL_DONATE_STEAL_INLINE=0",
-        "-DGOOGLE_PROTOBUF_NO_RTTI",
-        "-DGOOGLE_PROTOBUF_NO_STATIC_INITIALIZER",
-        "-DHAVE_PTHREAD",
-        "-DHAVE_SYS_UIO_H",
-        "-D_DEBUG",
-        "-D_GNU_SOURCE",
-        "-D_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS",
-        "-D_LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS",
-        "-D__STDC_CONSTANT_MACROS",
-        "-D__STDC_FORMAT_MACROS",
-    ],
-    local_include_dirs: [
-        "./",
-        "buildtools/third_party/libc++/",
-        "buildtools/third_party/libc++/trunk/include",
-        "buildtools/third_party/libc++abi/trunk/include",
-        "net/third_party/quiche/overrides/",
-        "net/third_party/quiche/src/",
-        "net/third_party/quiche/src/quiche/common/platform/default/",
-        "third_party/abseil-cpp/",
-        "third_party/boringssl/src/include/",
-        "third_party/protobuf/src/",
-    ],
-    cpp_std: "c++17",
-    target: {
-        android_x86: {
-            cflags: [
-                "-msse3",
-            ],
-        },
-        android_x86_64: {
-            cflags: [
-                "-msse3",
-            ],
-        },
-    },
-}
-
 // GN: //components/metrics:library_support
 cc_object {
     name: "cronet_aml_components_metrics_library_support",
@@ -4207,7 +3989,6 @@
         "base/android/java/src/org/chromium/base/Function.java",
         "base/android/java/src/org/chromium/base/ImportantFileWriterAndroid.java",
         "base/android/java/src/org/chromium/base/IntStringCallback.java",
-        "base/android/java/src/org/chromium/base/IntentUtils.java",
         "base/android/java/src/org/chromium/base/JNIUtils.java",
         "base/android/java/src/org/chromium/base/JavaExceptionReporter.java",
         "base/android/java/src/org/chromium/base/JavaHandlerThread.java",
@@ -4301,21 +4082,6 @@
         "base/android/java/src/org/chromium/base/metrics/TimingMetric.java",
         "base/android/java/src/org/chromium/base/metrics/UmaRecorder.java",
         "base/android/java/src/org/chromium/base/metrics/UmaRecorderHolder.java",
-        "base/android/java/src/org/chromium/base/multidex/ChromiumMultiDexInstaller.java",
-        "base/android/java/src/org/chromium/base/process_launcher/BindService.java",
-        "base/android/java/src/org/chromium/base/process_launcher/ChildConnectionAllocator.java",
-        "base/android/java/src/org/chromium/base/process_launcher/ChildProcessConnection.java",
-        "base/android/java/src/org/chromium/base/process_launcher/ChildProcessConstants.java",
-        "base/android/java/src/org/chromium/base/process_launcher/ChildProcessLauncher.java",
-        "base/android/java/src/org/chromium/base/process_launcher/ChildProcessService.java",
-        "base/android/java/src/org/chromium/base/process_launcher/ChildProcessServiceDelegate.java",
-        "base/android/java/src/org/chromium/base/process_launcher/ChildServiceConnection.java",
-        "base/android/java/src/org/chromium/base/process_launcher/ChildServiceConnectionDelegate.java",
-        "base/android/java/src/org/chromium/base/process_launcher/ChildServiceConnectionFactory.java",
-        "base/android/java/src/org/chromium/base/process_launcher/ChildServiceConnectionImpl.java",
-        "base/android/java/src/org/chromium/base/process_launcher/FileDescriptorInfo.java",
-        "base/android/java/src/org/chromium/base/process_launcher/IChildProcessService.aidl",
-        "base/android/java/src/org/chromium/base/process_launcher/IParentProcess.aidl",
         "base/android/java/src/org/chromium/base/supplier/BooleanSupplier.java",
         "base/android/java/src/org/chromium/base/supplier/DestroyableObservableSupplier.java",
         "base/android/java/src/org/chromium/base/supplier/ObservableSupplier.java",
@@ -4365,8 +4131,6 @@
         "components/cronet/android/java/src/org/chromium/net/impl/CronetUploadDataStream.java",
         "components/cronet/android/java/src/org/chromium/net/impl/CronetUrlRequest.java",
         "components/cronet/android/java/src/org/chromium/net/impl/CronetUrlRequestContext.java",
-        "components/cronet/android/java/src/org/chromium/net/impl/JavaUploadDataSinkBase.java",
-        "components/cronet/android/java/src/org/chromium/net/impl/JavaUrlRequestUtils.java",
         "components/cronet/android/java/src/org/chromium/net/impl/NativeCronetEngineBuilderImpl.java",
         "components/cronet/android/java/src/org/chromium/net/impl/NetworkExceptionImpl.java",
         "components/cronet/android/java/src/org/chromium/net/impl/NoOpLogger.java",
@@ -4418,11 +4182,8 @@
         "com.android.tethering",
     ],
     libs: [
-        "android-support-multidex",
         "androidx.annotation_annotation",
         "androidx.annotation_annotation-experimental-nodeps",
-        "androidx.collection_collection",
-        "androidx.core_core-nodeps",
         "cronet_aml_api_java",
         "framework-connectivity-t.stubs.module_lib",
         "framework-connectivity.stubs.module_lib",
@@ -5010,7 +4771,7 @@
 // GN: //net:ios_cronet_buildflags
 cc_genrule {
     name: "cronet_aml_net_ios_cronet_buildflags",
-    cmd: "echo '--flags CRONET_BUILD=\"false\"' | " +
+    cmd: "echo '--flags CRONET_BUILD=\"true\"' | " +
          "$(location build/write_buildflag_header.py) --output " +
          "$(out) " +
          "--rulename " +
diff --git a/tools/gn2bp/desc_arm.json b/tools/gn2bp/desc_arm.json
index dcfcd63..b59157a 100644
--- a/tools/gn2bp/desc_arm.json
+++ b/tools/gn2bp/desc_arm.json
Binary files differ
diff --git a/tools/gn2bp/desc_arm64.json b/tools/gn2bp/desc_arm64.json
index 6a26578..9881124 100644
--- a/tools/gn2bp/desc_arm64.json
+++ b/tools/gn2bp/desc_arm64.json
Binary files differ
diff --git a/tools/gn2bp/desc_x64.json b/tools/gn2bp/desc_x64.json
index f69f50f..3a2ce2a 100644
--- a/tools/gn2bp/desc_x64.json
+++ b/tools/gn2bp/desc_x64.json
Binary files differ
diff --git a/tools/gn2bp/desc_x86.json b/tools/gn2bp/desc_x86.json
index 4f30229..03bcf2f 100644
--- a/tools/gn2bp/desc_x86.json
+++ b/tools/gn2bp/desc_x86.json
Binary files differ
diff --git a/tools/gn2bp/gen_android_bp b/tools/gn2bp/gen_android_bp
index 27c3b11..dcf8897 100755
--- a/tools/gn2bp/gen_android_bp
+++ b/tools/gn2bp/gen_android_bp
@@ -1516,10 +1516,7 @@
   module.libs = {
     "androidx.annotation_annotation",
     "jsr305",
-    "androidx.core_core-nodeps",
-    "androidx.collection_collection",
     "androidx.annotation_annotation-experimental-nodeps",
-    "android-support-multidex",
     "framework-connectivity.stubs.module_lib",
     "framework-connectivity-t.stubs.module_lib",
     "framework-tethering.stubs.module_lib",
diff --git a/tools/gn2bp/gen_desc_json.sh b/tools/gn2bp/gen_desc_json.sh
index 510b967..ed684b3 100755
--- a/tools/gn2bp/gen_desc_json.sh
+++ b/tools/gn2bp/gen_desc_json.sh
@@ -30,6 +30,7 @@
     "use_hashed_jni_names = true"
     "treat_warnings_as_errors = false"
     "enable_base_tracing = false"
+    "is_cronet_build = true"
   )
   gn_args+=("target_cpu = \"${1}\"")