diff --git a/framework-t/src/android/net/nsd/AdvertisingRequest.java b/framework-t/src/android/net/nsd/AdvertisingRequest.java
new file mode 100644
index 0000000..b1ef98f
--- /dev/null
+++ b/framework-t/src/android/net/nsd/AdvertisingRequest.java
@@ -0,0 +1,180 @@
+/*
+ * 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 android.net.nsd;
+
+import android.annotation.LongDef;
+import android.annotation.NonNull;
+import android.os.Parcel;
+import android.os.Parcelable;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.util.Objects;
+
+/**
+ * Encapsulates parameters for {@link NsdManager#registerService}.
+ * @hide
+ */
+//@FlaggedApi(NsdManager.Flags.ADVERTISE_REQUEST_API)
+public final class AdvertisingRequest implements Parcelable {
+
+    /**
+     * Only update the registration without sending exit and re-announcement.
+     */
+    public static final int NSD_ADVERTISING_UPDATE_ONLY = 1;
+
+
+    @NonNull
+    public static final Creator<AdvertisingRequest> CREATOR =
+            new Creator<>() {
+                @Override
+                public AdvertisingRequest createFromParcel(Parcel in) {
+                    final NsdServiceInfo serviceInfo = in.readParcelable(
+                            NsdServiceInfo.class.getClassLoader(), NsdServiceInfo.class);
+                    final int protocolType = in.readInt();
+                    final long advertiseConfig = in.readLong();
+                    return new AdvertisingRequest(serviceInfo, protocolType, advertiseConfig);
+                }
+
+                @Override
+                public AdvertisingRequest[] newArray(int size) {
+                    return new AdvertisingRequest[size];
+                }
+            };
+    @NonNull
+    private final NsdServiceInfo mServiceInfo;
+    private final int mProtocolType;
+    // Bitmask of @AdvertisingConfig flags. Uses a long to allow 64 possible flags in the future.
+    private final long mAdvertisingConfig;
+
+    /**
+     * @hide
+     */
+    @Retention(RetentionPolicy.SOURCE)
+    @LongDef(flag = true, prefix = {"NSD_ADVERTISING"}, value = {
+            NSD_ADVERTISING_UPDATE_ONLY,
+    })
+    @interface AdvertisingConfig {}
+
+    /**
+     * The constructor for the advertiseRequest
+     */
+    private AdvertisingRequest(@NonNull NsdServiceInfo serviceInfo, int protocolType,
+            long advertisingConfig) {
+        mServiceInfo = serviceInfo;
+        mProtocolType = protocolType;
+        mAdvertisingConfig = advertisingConfig;
+    }
+
+    /**
+     * Returns the {@link NsdServiceInfo}
+     */
+    @NonNull
+    public NsdServiceInfo getServiceInfo() {
+        return mServiceInfo;
+    }
+
+    /**
+     * Returns the service advertise protocol
+     */
+    public int getProtocolType() {
+        return mProtocolType;
+    }
+
+    /**
+     * Returns the advertising config.
+     */
+    public long getAdvertisingConfig() {
+        return mAdvertisingConfig;
+    }
+
+    @Override
+    public String toString() {
+        StringBuilder sb = new StringBuilder();
+        sb.append("serviceInfo: ").append(mServiceInfo)
+                .append(", protocolType: ").append(mProtocolType)
+                .append(", advertisingConfig: ").append(mAdvertisingConfig);
+        return sb.toString();
+    }
+
+    @Override
+    public boolean equals(Object other) {
+        if (this == other) {
+            return true;
+        } else if (!(other instanceof AdvertisingRequest)) {
+            return false;
+        } else {
+            final AdvertisingRequest otherRequest = (AdvertisingRequest) other;
+            return mServiceInfo.equals(otherRequest.mServiceInfo)
+                    && mProtocolType == otherRequest.mProtocolType
+                    && mAdvertisingConfig == otherRequest.mAdvertisingConfig;
+        }
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(mServiceInfo, mProtocolType, mAdvertisingConfig);
+    }
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(@NonNull Parcel dest, int flags) {
+        dest.writeParcelable(mServiceInfo, flags);
+        dest.writeInt(mProtocolType);
+        dest.writeLong(mAdvertisingConfig);
+    }
+
+//    @FlaggedApi(NsdManager.Flags.ADVERTISE_REQUEST_API)
+    /**
+     * The builder for creating new {@link AdvertisingRequest} objects.
+     * @hide
+     */
+    public static final class Builder {
+        @NonNull
+        private final NsdServiceInfo mServiceInfo;
+        private final int mProtocolType;
+        private long mAdvertisingConfig;
+        /**
+         * Creates a new {@link Builder} object.
+         */
+        public Builder(@NonNull NsdServiceInfo serviceInfo, int protocolType) {
+            mServiceInfo = serviceInfo;
+            mProtocolType = protocolType;
+        }
+
+        /**
+         * Sets advertising configuration flags.
+         *
+         * @param advertisingConfigFlags Bitmask of {@code AdvertisingConfig} flags.
+         */
+        @NonNull
+        public Builder setAdvertisingConfig(long advertisingConfigFlags) {
+            mAdvertisingConfig = advertisingConfigFlags;
+            return this;
+        }
+
+
+        /** Creates a new {@link AdvertisingRequest} object. */
+        @NonNull
+        public AdvertisingRequest build() {
+            return new AdvertisingRequest(mServiceInfo, mProtocolType, mAdvertisingConfig);
+        }
+    }
+}
diff --git a/framework-t/src/android/net/nsd/INsdServiceConnector.aidl b/framework-t/src/android/net/nsd/INsdServiceConnector.aidl
index e671db1..b03eb29 100644
--- a/framework-t/src/android/net/nsd/INsdServiceConnector.aidl
+++ b/framework-t/src/android/net/nsd/INsdServiceConnector.aidl
@@ -16,6 +16,7 @@
 
 package android.net.nsd;
 
+import android.net.nsd.AdvertisingRequest;
 import android.net.nsd.INsdManagerCallback;
 import android.net.nsd.IOffloadEngine;
 import android.net.nsd.NsdServiceInfo;
@@ -27,7 +28,7 @@
  * {@hide}
  */
 interface INsdServiceConnector {
-    void registerService(int listenerKey, in NsdServiceInfo serviceInfo);
+    void registerService(int listenerKey, in AdvertisingRequest advertisingRequest);
     void unregisterService(int listenerKey);
     void discoverServices(int listenerKey, in NsdServiceInfo serviceInfo);
     void stopDiscovery(int listenerKey);
diff --git a/framework-t/src/android/net/nsd/NsdManager.java b/framework-t/src/android/net/nsd/NsdManager.java
index fcf79eb..053ecf2 100644
--- a/framework-t/src/android/net/nsd/NsdManager.java
+++ b/framework-t/src/android/net/nsd/NsdManager.java
@@ -46,6 +46,7 @@
 import android.util.ArrayMap;
 import android.util.ArraySet;
 import android.util.Log;
+import android.util.Pair;
 import android.util.SparseArray;
 
 import com.android.internal.annotations.GuardedBy;
@@ -57,6 +58,8 @@
 import java.util.ArrayList;
 import java.util.Objects;
 import java.util.concurrent.Executor;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
 
 /**
  * The Network Service Discovery Manager class provides the API to discover services
@@ -152,9 +155,38 @@
                 "com.android.net.flags.register_nsd_offload_engine_api";
         static final String NSD_SUBTYPES_SUPPORT_ENABLED =
                 "com.android.net.flags.nsd_subtypes_support_enabled";
+        static final String ADVERTISE_REQUEST_API =
+                "com.android.net.flags.advertise_request_api";
     }
 
     /**
+     * A regex for the acceptable format of a type or subtype label.
+     * @hide
+     */
+    public static final String TYPE_SUBTYPE_LABEL_REGEX = "_[a-zA-Z0-9-_]{1,61}[a-zA-Z0-9]";
+
+    /**
+     * A regex for the acceptable format of a service type specification.
+     *
+     * When it matches, matcher group 1 is an optional leading subtype when using legacy dot syntax
+     * (_subtype._type._tcp). Matcher group 2 is the actual type, and matcher group 3 contains
+     * optional comma-separated subtypes.
+     * @hide
+     */
+    public static final String TYPE_REGEX =
+            // Optional leading subtype (_subtype._type._tcp)
+            // (?: xxx) is a non-capturing parenthesis, don't capture the dot
+            "^(?:(" + TYPE_SUBTYPE_LABEL_REGEX + ")\\.)?"
+                    // Actual type (_type._tcp.local)
+                    + "(" + TYPE_SUBTYPE_LABEL_REGEX + "\\._(?:tcp|udp))"
+                    // Drop '.' at the end of service type that is compatible with old backend.
+                    // e.g. allow "_type._tcp.local."
+                    + "\\.?"
+                    // Optional subtype after comma, for "_type._tcp,_subtype1,_subtype2" format
+                    + "((?:," + TYPE_SUBTYPE_LABEL_REGEX + ")*)"
+                    + "$";
+
+    /**
      * Broadcast intent action to indicate whether network service discovery is
      * enabled or disabled. An extra {@link #EXTRA_NSD_STATE} provides the state
      * information as int.
@@ -1098,6 +1130,16 @@
         return key;
     }
 
+    private int updateRegisteredListener(Object listener, Executor e, NsdServiceInfo s) {
+        final int key;
+        synchronized (mMapLock) {
+            key = getListenerKey(listener);
+            mServiceMap.put(key, s);
+            mExecutorMap.put(key, e);
+        }
+        return key;
+    }
+
     private void removeListener(int key) {
         synchronized (mMapLock) {
             mListenerMap.remove(key);
@@ -1162,14 +1204,111 @@
      */
     public void registerService(@NonNull NsdServiceInfo serviceInfo, int protocolType,
             @NonNull Executor executor, @NonNull RegistrationListener listener) {
+        checkServiceInfo(serviceInfo);
+        checkProtocol(protocolType);
+        final AdvertisingRequest.Builder builder = new AdvertisingRequest.Builder(serviceInfo,
+                protocolType);
+        // Optionally assume that the request is an update request if it uses subtypes and the same
+        // listener. This is not documented behavior as support for advertising subtypes via
+        // "_servicename,_sub1,_sub2" has never been documented in the first place, and using
+        // multiple subtypes was broken in T until a later module update. Subtype registration is
+        // documented in the NsdServiceInfo.setSubtypes API instead, but this provides a limited
+        // option for users of the older undocumented behavior, only for subtype changes.
+        if (isSubtypeUpdateRequest(serviceInfo, listener)) {
+            builder.setAdvertisingConfig(AdvertisingRequest.NSD_ADVERTISING_UPDATE_ONLY);
+        }
+        registerService(builder.build(), executor, listener);
+    }
+
+    private boolean isSubtypeUpdateRequest(@NonNull NsdServiceInfo serviceInfo, @NonNull
+            RegistrationListener listener) {
+        // If the listener is the same object, serviceInfo is for the same service name and
+        // type (outside of subtypes), and either of them use subtypes, treat the request as a
+        // subtype update request.
+        synchronized (mMapLock) {
+            int valueIndex = mListenerMap.indexOfValue(listener);
+            if (valueIndex == -1) {
+                return false;
+            }
+            final int key = mListenerMap.keyAt(valueIndex);
+            NsdServiceInfo existingService = mServiceMap.get(key);
+            if (existingService == null) {
+                return false;
+            }
+            final Pair<String, String> existingTypeSubtype = getTypeAndSubtypes(
+                    existingService.getServiceType());
+            final Pair<String, String> newTypeSubtype = getTypeAndSubtypes(
+                    serviceInfo.getServiceType());
+            if (existingTypeSubtype == null || newTypeSubtype == null) {
+                return false;
+            }
+            final boolean existingHasNoSubtype = TextUtils.isEmpty(existingTypeSubtype.second);
+            final boolean updatedHasNoSubtype = TextUtils.isEmpty(newTypeSubtype.second);
+            if (existingHasNoSubtype && updatedHasNoSubtype) {
+                // Only allow subtype changes when subtypes are used. This ensures that this
+                // behavior does not affect most requests.
+                return false;
+            }
+
+            return Objects.equals(existingService.getServiceName(), serviceInfo.getServiceName())
+                    && Objects.equals(existingTypeSubtype.first, newTypeSubtype.first);
+        }
+    }
+
+    /**
+     * Get the base type from a type specification with "_type._tcp,sub1,sub2" syntax.
+     *
+     * <p>This rejects specifications using dot syntax to specify subtypes ("_sub1._type._tcp").
+     *
+     * @return Type and comma-separated list of subtypes, or null if invalid format.
+     */
+    @Nullable
+    private static Pair<String, String> getTypeAndSubtypes(@NonNull String typeWithSubtype) {
+        final Matcher matcher = Pattern.compile(TYPE_REGEX).matcher(typeWithSubtype);
+        if (!matcher.matches()) return null;
+        // Reject specifications using leading subtypes with a dot
+        if (!TextUtils.isEmpty(matcher.group(1))) return null;
+        return new Pair<>(matcher.group(2), matcher.group(3));
+    }
+
+    /**
+     * Register a service to be discovered by other services.
+     *
+     * <p> The function call immediately returns after sending a request to register service
+     * to the framework. The application is notified of a successful registration
+     * through the callback {@link RegistrationListener#onServiceRegistered} or a failure
+     * through {@link RegistrationListener#onRegistrationFailed}.
+     *
+     * <p> The application should call {@link #unregisterService} when the service
+     * registration is no longer required, and/or whenever the application is stopped.
+     * @param  advertisingRequest service being registered
+     * @param executor Executor to run listener callbacks with
+     * @param listener The listener notifies of a successful registration and is used to
+     * unregister this service through a call on {@link #unregisterService}. Cannot be null.
+     *
+     * @hide
+     */
+//    @FlaggedApi(Flags.ADVERTISE_REQUEST_API)
+    public void registerService(@NonNull AdvertisingRequest advertisingRequest,
+            @NonNull Executor executor,
+            @NonNull RegistrationListener listener) {
+        final NsdServiceInfo serviceInfo = advertisingRequest.getServiceInfo();
+        final int protocolType = advertisingRequest.getProtocolType();
         if (serviceInfo.getPort() <= 0) {
             throw new IllegalArgumentException("Invalid port number");
         }
         checkServiceInfo(serviceInfo);
         checkProtocol(protocolType);
-        int key = putListener(listener, executor, serviceInfo);
+        final int key;
+        // For update only request, the old listener has to be reused
+        if ((advertisingRequest.getAdvertisingConfig()
+                & AdvertisingRequest.NSD_ADVERTISING_UPDATE_ONLY) > 0) {
+            key = updateRegisteredListener(listener, executor, serviceInfo);
+        } else {
+            key = putListener(listener, executor, serviceInfo);
+        }
         try {
-            mService.registerService(key, serviceInfo);
+            mService.registerService(key, advertisingRequest);
         } catch (RemoteException e) {
             e.rethrowFromSystemServer();
         }
diff --git a/framework/aidl-export/android/net/nsd/AdvertisingRequest.aidl b/framework/aidl-export/android/net/nsd/AdvertisingRequest.aidl
new file mode 100644
index 0000000..2848074
--- /dev/null
+++ b/framework/aidl-export/android/net/nsd/AdvertisingRequest.aidl
@@ -0,0 +1,19 @@
+/*
+ * 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 android.net.nsd;
+
+@JavaOnlyStableParcelable parcelable AdvertisingRequest;
\ No newline at end of file
diff --git a/service-t/src/com/android/server/NsdService.java b/service-t/src/com/android/server/NsdService.java
index 6086207..1168320 100644
--- a/service-t/src/com/android/server/NsdService.java
+++ b/service-t/src/com/android/server/NsdService.java
@@ -26,6 +26,8 @@
 import static android.net.nsd.NsdManager.MDNS_DISCOVERY_MANAGER_EVENT;
 import static android.net.nsd.NsdManager.MDNS_SERVICE_EVENT;
 import static android.net.nsd.NsdManager.RESOLVE_SERVICE_SUCCEEDED;
+import static android.net.nsd.NsdManager.TYPE_REGEX;
+import static android.net.nsd.NsdManager.TYPE_SUBTYPE_LABEL_REGEX;
 import static android.provider.DeviceConfig.NAMESPACE_TETHERING;
 
 import static com.android.modules.utils.build.SdkLevel.isAtLeastU;
@@ -51,6 +53,7 @@
 import android.net.mdns.aidl.IMDnsEventListener;
 import android.net.mdns.aidl.RegistrationInfo;
 import android.net.mdns.aidl.ResolutionInfo;
+import android.net.nsd.AdvertisingRequest;
 import android.net.nsd.INsdManager;
 import android.net.nsd.INsdManagerCallback;
 import android.net.nsd.INsdServiceConnector;
@@ -173,7 +176,7 @@
             "mdns_advertiser_allowlist_";
     private static final String MDNS_ALLOWLIST_FLAG_SUFFIX = "_version";
 
-    private static final String TYPE_SUBTYPE_LABEL_REGEX = "_[a-zA-Z0-9-_]{1,61}[a-zA-Z0-9]";
+
 
     @VisibleForTesting
     static final String MDNS_CONFIG_RUNNING_APP_ACTIVE_IMPORTANCE_CUTOFF =
@@ -728,12 +731,11 @@
                 final ClientInfo clientInfo;
                 final int transactionId;
                 final int clientRequestId = msg.arg2;
-                final ListenerArgs args;
                 final OffloadEngineInfo offloadEngineInfo;
                 switch (msg.what) {
                     case NsdManager.DISCOVER_SERVICES: {
                         if (DBG) Log.d(TAG, "Discover services");
-                        args = (ListenerArgs) msg.obj;
+                        final ListenerArgs args = (ListenerArgs) msg.obj;
                         clientInfo = mClients.get(args.connector);
                         // If the binder death notification for a INsdManagerCallback was received
                         // before any calls are received by NsdService, the clientInfo would be
@@ -809,7 +811,7 @@
                     }
                     case NsdManager.STOP_DISCOVERY: {
                         if (DBG) Log.d(TAG, "Stop service discovery");
-                        args = (ListenerArgs) msg.obj;
+                        final ListenerArgs args = (ListenerArgs) msg.obj;
                         clientInfo = mClients.get(args.connector);
                         // If the binder death notification for a INsdManagerCallback was received
                         // before any calls are received by NsdService, the clientInfo would be
@@ -847,7 +849,7 @@
                     }
                     case NsdManager.REGISTER_SERVICE: {
                         if (DBG) Log.d(TAG, "Register service");
-                        args = (ListenerArgs) msg.obj;
+                        final AdvertisingArgs args = (AdvertisingArgs) msg.obj;
                         clientInfo = mClients.get(args.connector);
                         // If the binder death notification for a INsdManagerCallback was received
                         // before any calls are received by NsdService, the clientInfo would be
@@ -862,9 +864,12 @@
                                     NsdManager.FAILURE_MAX_LIMIT, true /* isLegacy */);
                             break;
                         }
-
-                        transactionId = getUniqueId();
-                        final NsdServiceInfo serviceInfo = args.serviceInfo;
+                        final AdvertisingRequest advertisingRequest = args.advertisingRequest;
+                        if (advertisingRequest == null) {
+                            Log.e(TAG, "Unknown advertisingRequest in registration");
+                            break;
+                        }
+                        final NsdServiceInfo serviceInfo = advertisingRequest.getServiceInfo();
                         final String serviceType = serviceInfo.getServiceType();
                         final Pair<String, List<String>> typeSubtype = parseTypeAndSubtype(
                                 serviceType);
@@ -879,6 +884,23 @@
                                         NsdManager.FAILURE_INTERNAL_ERROR, false /* isLegacy */);
                                 break;
                             }
+                            boolean isUpdateOnly = (advertisingRequest.getAdvertisingConfig()
+                                    & AdvertisingRequest.NSD_ADVERTISING_UPDATE_ONLY) > 0;
+                            // If it is an update request, then reuse the old transactionId
+                            if (isUpdateOnly) {
+                                final ClientRequest existingClientRequest =
+                                        clientInfo.mClientRequests.get(clientRequestId);
+                                if (existingClientRequest == null) {
+                                    Log.e(TAG, "Invalid update on requestId: " + clientRequestId);
+                                    clientInfo.onRegisterServiceFailedImmediately(clientRequestId,
+                                            NsdManager.FAILURE_INTERNAL_ERROR,
+                                            false /* isLegacy */);
+                                    break;
+                                }
+                                transactionId = existingClientRequest.mTransactionId;
+                            } else {
+                                transactionId = getUniqueId();
+                            }
                             serviceInfo.setServiceType(registerServiceType);
                             serviceInfo.setServiceName(truncateServiceName(
                                     serviceInfo.getServiceName()));
@@ -899,12 +921,16 @@
 
                             serviceInfo.setSubtypes(subtypes);
                             maybeStartMonitoringSockets();
+                            final MdnsAdvertisingOptions mdnsAdvertisingOptions =
+                                    MdnsAdvertisingOptions.newBuilder().setIsOnlyUpdate(
+                                            isUpdateOnly).build();
                             mAdvertiser.addOrUpdateService(transactionId, serviceInfo,
-                                    MdnsAdvertisingOptions.newBuilder().build());
+                                    mdnsAdvertisingOptions);
                             storeAdvertiserRequestMap(clientRequestId, transactionId, clientInfo,
                                     serviceInfo.getNetwork());
                         } else {
                             maybeStartDaemon();
+                            transactionId = getUniqueId();
                             if (registerService(transactionId, serviceInfo)) {
                                 if (DBG) {
                                     Log.d(TAG, "Register " + clientRequestId
@@ -924,7 +950,7 @@
                     }
                     case NsdManager.UNREGISTER_SERVICE: {
                         if (DBG) Log.d(TAG, "unregister service");
-                        args = (ListenerArgs) msg.obj;
+                        final ListenerArgs args = (ListenerArgs) msg.obj;
                         clientInfo = mClients.get(args.connector);
                         // If the binder death notification for a INsdManagerCallback was received
                         // before any calls are received by NsdService, the clientInfo would be
@@ -967,7 +993,7 @@
                     }
                     case NsdManager.RESOLVE_SERVICE: {
                         if (DBG) Log.d(TAG, "Resolve service");
-                        args = (ListenerArgs) msg.obj;
+                        final ListenerArgs args = (ListenerArgs) msg.obj;
                         clientInfo = mClients.get(args.connector);
                         // If the binder death notification for a INsdManagerCallback was received
                         // before any calls are received by NsdService, the clientInfo would be
@@ -1029,7 +1055,7 @@
                     }
                     case NsdManager.STOP_RESOLUTION: {
                         if (DBG) Log.d(TAG, "Stop service resolution");
-                        args = (ListenerArgs) msg.obj;
+                        final ListenerArgs args = (ListenerArgs) msg.obj;
                         clientInfo = mClients.get(args.connector);
                         // If the binder death notification for a INsdManagerCallback was received
                         // before any calls are received by NsdService, the clientInfo would be
@@ -1068,7 +1094,7 @@
                     }
                     case NsdManager.REGISTER_SERVICE_CALLBACK: {
                         if (DBG) Log.d(TAG, "Register a service callback");
-                        args = (ListenerArgs) msg.obj;
+                        final ListenerArgs args = (ListenerArgs) msg.obj;
                         clientInfo = mClients.get(args.connector);
                         // If the binder death notification for a INsdManagerCallback was received
                         // before any calls are received by NsdService, the clientInfo would be
@@ -1111,7 +1137,7 @@
                     }
                     case NsdManager.UNREGISTER_SERVICE_CALLBACK: {
                         if (DBG) Log.d(TAG, "Unregister a service callback");
-                        args = (ListenerArgs) msg.obj;
+                        final ListenerArgs args = (ListenerArgs) msg.obj;
                         clientInfo = mClients.get(args.connector);
                         // If the binder death notification for a INsdManagerCallback was received
                         // before any calls are received by NsdService, the clientInfo would be
@@ -1638,20 +1664,7 @@
     @Nullable
     public static Pair<String, List<String>> parseTypeAndSubtype(String serviceType) {
         if (TextUtils.isEmpty(serviceType)) return null;
-
-        final String regexString =
-                // Optional leading subtype (_subtype._type._tcp)
-                // (?: xxx) is a non-capturing parenthesis, don't capture the dot
-                "^(?:(" + TYPE_SUBTYPE_LABEL_REGEX + ")\\.)?"
-                        // Actual type (_type._tcp.local)
-                        + "(" + TYPE_SUBTYPE_LABEL_REGEX + "\\._(?:tcp|udp))"
-                        // Drop '.' at the end of service type that is compatible with old backend.
-                        // e.g. allow "_type._tcp.local."
-                        + "\\.?"
-                        // Optional subtype after comma, for "_type._tcp,_subtype1,_subtype2" format
-                        + "((?:," + TYPE_SUBTYPE_LABEL_REGEX + ")*)"
-                        + "$";
-        final Pattern serviceTypePattern = Pattern.compile(regexString);
+        final Pattern serviceTypePattern = Pattern.compile(TYPE_REGEX);
         final Matcher matcher = serviceTypePattern.matcher(serviceType);
         if (!matcher.matches()) return null;
         final String queryType = matcher.group(2);
@@ -2077,20 +2090,33 @@
         }
     }
 
+    private static class AdvertisingArgs {
+        public final NsdServiceConnector connector;
+        public final AdvertisingRequest advertisingRequest;
+
+        AdvertisingArgs(NsdServiceConnector connector, AdvertisingRequest advertisingRequest) {
+            this.connector = connector;
+            this.advertisingRequest = advertisingRequest;
+        }
+    }
+
     private class NsdServiceConnector extends INsdServiceConnector.Stub
             implements IBinder.DeathRecipient  {
+
         @Override
-        public void registerService(int listenerKey, NsdServiceInfo serviceInfo) {
+        public void registerService(int listenerKey, AdvertisingRequest advertisingRequest)
+                throws RemoteException {
             mNsdStateMachine.sendMessage(mNsdStateMachine.obtainMessage(
                     NsdManager.REGISTER_SERVICE, 0, listenerKey,
-                    new ListenerArgs(this, serviceInfo)));
+                    new AdvertisingArgs(this, advertisingRequest)
+            ));
         }
 
         @Override
         public void unregisterService(int listenerKey) {
             mNsdStateMachine.sendMessage(mNsdStateMachine.obtainMessage(
                     NsdManager.UNREGISTER_SERVICE, 0, listenerKey,
-                    new ListenerArgs(this, null)));
+                    new ListenerArgs(this, (NsdServiceInfo) null)));
         }
 
         @Override
@@ -2102,8 +2128,8 @@
 
         @Override
         public void stopDiscovery(int listenerKey) {
-            mNsdStateMachine.sendMessage(mNsdStateMachine.obtainMessage(
-                    NsdManager.STOP_DISCOVERY, 0, listenerKey, new ListenerArgs(this, null)));
+            mNsdStateMachine.sendMessage(mNsdStateMachine.obtainMessage(NsdManager.STOP_DISCOVERY,
+                    0, listenerKey, new ListenerArgs(this, (NsdServiceInfo) null)));
         }
 
         @Override
@@ -2115,8 +2141,8 @@
 
         @Override
         public void stopResolution(int listenerKey) {
-            mNsdStateMachine.sendMessage(mNsdStateMachine.obtainMessage(
-                    NsdManager.STOP_RESOLUTION, 0, listenerKey, new ListenerArgs(this, null)));
+            mNsdStateMachine.sendMessage(mNsdStateMachine.obtainMessage(NsdManager.STOP_RESOLUTION,
+                    0, listenerKey, new ListenerArgs(this, (NsdServiceInfo) null)));
         }
 
         @Override
@@ -2130,13 +2156,13 @@
         public void unregisterServiceInfoCallback(int listenerKey) {
             mNsdStateMachine.sendMessage(mNsdStateMachine.obtainMessage(
                     NsdManager.UNREGISTER_SERVICE_CALLBACK, 0, listenerKey,
-                    new ListenerArgs(this, null)));
+                    new ListenerArgs(this, (NsdServiceInfo) null)));
         }
 
         @Override
         public void startDaemon() {
-            mNsdStateMachine.sendMessage(mNsdStateMachine.obtainMessage(
-                    NsdManager.DAEMON_STARTUP, new ListenerArgs(this, null)));
+            mNsdStateMachine.sendMessage(mNsdStateMachine.obtainMessage(NsdManager.DAEMON_STARTUP,
+                    new ListenerArgs(this, (NsdServiceInfo) null)));
         }
 
         @Override
diff --git a/service-t/src/com/android/server/connectivity/mdns/MdnsServiceTypeClient.java b/service-t/src/com/android/server/connectivity/mdns/MdnsServiceTypeClient.java
index 32f604e..df0a040 100644
--- a/service-t/src/com/android/server/connectivity/mdns/MdnsServiceTypeClient.java
+++ b/service-t/src/com/android/server/connectivity/mdns/MdnsServiceTypeClient.java
@@ -541,6 +541,9 @@
             }
 
             if (response.isComplete()) {
+                // There is a bug here: the newServiceFound is global right now. The state needs
+                // to be per listener because of the  responseMatchesOptions() filter.
+                // Otherwise, it won't handle the subType update properly.
                 if (newServiceFound || serviceBecomesComplete) {
                     sharedLog.log("onServiceFound: " + serviceInfo);
                     listener.onServiceFound(serviceInfo, false /* isServiceFromCache */);
diff --git a/tests/cts/net/src/android/net/cts/NsdManagerTest.kt b/tests/cts/net/src/android/net/cts/NsdManagerTest.kt
index e0387c9..a040201 100644
--- a/tests/cts/net/src/android/net/cts/NsdManagerTest.kt
+++ b/tests/cts/net/src/android/net/cts/NsdManagerTest.kt
@@ -1064,6 +1064,32 @@
     }
 
     @Test
+    fun testMultipleSubTypeAdvertisingAndDiscovery_withUpdate() {
+        val si1 = makeTestServiceInfo(network = testNetwork1.network).apply {
+            serviceType += ",_subtype1"
+        }
+        val si2 = makeTestServiceInfo(network = testNetwork1.network).apply {
+            serviceType += ",_subtype2"
+        }
+        val registrationRecord = NsdRegistrationRecord()
+        val subtype3DiscoveryRecord = NsdDiscoveryRecord()
+        tryTest {
+            registerService(registrationRecord, si1)
+            updateService(registrationRecord, si2)
+            nsdManager.discoverServices("_subtype2.$serviceType",
+                    NsdManager.PROTOCOL_DNS_SD, testNetwork1.network,
+                    { it.run() }, subtype3DiscoveryRecord)
+            subtype3DiscoveryRecord.waitForServiceDiscovered(serviceName,
+                    serviceType, testNetwork1.network)
+        } cleanupStep {
+            nsdManager.stopServiceDiscovery(subtype3DiscoveryRecord)
+            subtype3DiscoveryRecord.expectCallback<DiscoveryStopped>()
+        } cleanup {
+            nsdManager.unregisterService(registrationRecord)
+        }
+    }
+
+    @Test
     fun testSubtypeAdvertising_tooManySubtypes_returnsFailureBadParameters() {
         val si = makeTestServiceInfo(network = testNetwork1.network)
         // Sets 101 subtypes in total
@@ -1404,6 +1430,18 @@
         return cb.serviceInfo
     }
 
+    /**
+     * Update a service.
+     */
+    private fun updateService(
+            record: NsdRegistrationRecord,
+            si: NsdServiceInfo,
+            executor: Executor = Executor { it.run() }
+    ) {
+        nsdManager.registerService(si, NsdManager.PROTOCOL_DNS_SD, executor, record)
+        // TODO: add the callback check for the update.
+    }
+
     private fun resolveService(discoveredInfo: NsdServiceInfo): NsdServiceInfo {
         val record = NsdResolveRecord()
         nsdManager.resolveService(discoveredInfo, Executor { it.run() }, record)
diff --git a/tests/unit/java/android/net/nsd/NsdManagerTest.java b/tests/unit/java/android/net/nsd/NsdManagerTest.java
index 550a9ee..1cfdefe 100644
--- a/tests/unit/java/android/net/nsd/NsdManagerTest.java
+++ b/tests/unit/java/android/net/nsd/NsdManagerTest.java
@@ -196,6 +196,22 @@
         verify(listener2, timeout(mTimeoutMs).times(1)).onServiceResolved(reply);
     }
 
+    @Test
+    public void testRegisterServiceWithAdvertisingRequest() throws Exception {
+        final NsdManager manager = mManager;
+        final NsdServiceInfo request = new NsdServiceInfo("another_name2", "another_type2");
+        request.setPort(2203);
+        final AdvertisingRequest advertisingRequest = new AdvertisingRequest.Builder(request,
+                PROTOCOL).build();
+        final NsdManager.RegistrationListener listener = mock(
+                NsdManager.RegistrationListener.class);
+
+        manager.registerService(advertisingRequest, Runnable::run, listener);
+        int key4 = getRequestKey(req -> verify(mServiceConn).registerService(req.capture(), any()));
+        mCallback.onRegisterServiceSucceeded(key4, request);
+        verify(listener, timeout(mTimeoutMs).times(1)).onServiceRegistered(request);
+    }
+
     private void doTestRegisterService() throws Exception {
         NsdManager manager = mManager;
 
@@ -346,8 +362,19 @@
         NsdManager.ResolveListener listener3 = mock(NsdManager.ResolveListener.class);
 
         NsdServiceInfo invalidService = new NsdServiceInfo(null, null);
-        NsdServiceInfo validService = new NsdServiceInfo("a_name", "a_type");
+        NsdServiceInfo validService = new NsdServiceInfo("a_name", "_a_type._tcp");
+        NsdServiceInfo otherServiceWithSubtype = new NsdServiceInfo("b_name", "_a_type._tcp,_sub1");
+        NsdServiceInfo validServiceDuplicate = new NsdServiceInfo("a_name", "_a_type._tcp");
+        NsdServiceInfo validServiceSubtypeUpdate = new NsdServiceInfo("a_name",
+                "_a_type._tcp,_sub1,_s2");
+        NsdServiceInfo otherSubtypeUpdate = new NsdServiceInfo("a_name", "_a_type._tcp,_sub1,_s3");
+        NsdServiceInfo dotSyntaxSubtypeUpdate = new NsdServiceInfo("a_name", "_sub1._a_type._tcp");
         validService.setPort(2222);
+        otherServiceWithSubtype.setPort(2222);
+        validServiceDuplicate.setPort(2222);
+        validServiceSubtypeUpdate.setPort(2222);
+        otherSubtypeUpdate.setPort(2222);
+        dotSyntaxSubtypeUpdate.setPort(2222);
 
         // Service registration
         //  - invalid arguments
@@ -358,7 +385,21 @@
         mustFail(() -> { manager.registerService(validService, -1, listener1); });
         mustFail(() -> { manager.registerService(validService, PROTOCOL, null); });
         manager.registerService(validService, PROTOCOL, listener1);
-        //  - listener already registered
+        //  - update without subtype is not allowed
+        mustFail(() -> { manager.registerService(validServiceDuplicate, PROTOCOL, listener1); });
+        //  - update with subtype is allowed
+        manager.registerService(validServiceSubtypeUpdate, PROTOCOL, listener1);
+        //  - re-updating to the same subtype is allowed
+        manager.registerService(validServiceSubtypeUpdate, PROTOCOL, listener1);
+        //  - updating to other subtypes is allowed
+        manager.registerService(otherSubtypeUpdate, PROTOCOL, listener1);
+        //  - update back to the service without subtype is allowed
+        manager.registerService(validService, PROTOCOL, listener1);
+        //  - updating to a subtype with _sub._type syntax is not allowed
+        mustFail(() -> { manager.registerService(dotSyntaxSubtypeUpdate, PROTOCOL, listener1); });
+        //  - updating to a different service name is not allowed
+        mustFail(() -> { manager.registerService(otherServiceWithSubtype, PROTOCOL, listener1); });
+        //  - listener already registered, and not using subtypes
         mustFail(() -> { manager.registerService(validService, PROTOCOL, listener1); });
         manager.unregisterService(listener1);
         // TODO: make listener immediately reusable