diff --git a/core/java/android/net/ConnectivityManager.java b/core/java/android/net/ConnectivityManager.java
index 06c1598..8742ecb 100644
--- a/core/java/android/net/ConnectivityManager.java
+++ b/core/java/android/net/ConnectivityManager.java
@@ -16,6 +16,9 @@
 package android.net;
 
 import static android.net.IpSecManager.INVALID_RESOURCE_ID;
+import static android.net.NetworkRequest.Type.LISTEN;
+import static android.net.NetworkRequest.Type.REQUEST;
+import static android.net.NetworkRequest.Type.TRACK_DEFAULT;
 
 import android.annotation.CallbackExecutor;
 import android.annotation.IntDef;
@@ -3730,14 +3733,12 @@
     private static final HashMap<NetworkRequest, NetworkCallback> sCallbacks = new HashMap<>();
     private static CallbackHandler sCallbackHandler;
 
-    private static final int LISTEN  = 1;
-    private static final int REQUEST = 2;
-
     private NetworkRequest sendRequestForNetwork(NetworkCapabilities need, NetworkCallback callback,
-            int timeoutMs, int action, int legacyType, CallbackHandler handler) {
+            int timeoutMs, NetworkRequest.Type reqType, int legacyType, CallbackHandler handler) {
         printStackTrace();
         checkCallbackNotNull(callback);
-        Preconditions.checkArgument(action == REQUEST || need != null, "null NetworkCapabilities");
+        Preconditions.checkArgument(
+                reqType == TRACK_DEFAULT || need != null, "null NetworkCapabilities");
         final NetworkRequest request;
         final String callingPackageName = mContext.getOpPackageName();
         try {
@@ -3750,13 +3751,13 @@
                 }
                 Messenger messenger = new Messenger(handler);
                 Binder binder = new Binder();
-                if (action == LISTEN) {
+                if (reqType == LISTEN) {
                     request = mService.listenForNetwork(
                             need, messenger, binder, callingPackageName);
                 } else {
                     request = mService.requestNetwork(
-                            need, messenger, timeoutMs, binder, legacyType, callingPackageName,
-                            getAttributionTag());
+                            need, reqType.ordinal(), messenger, timeoutMs, binder, legacyType,
+                            callingPackageName, getAttributionTag());
                 }
                 if (request != null) {
                     sCallbacks.put(request, callback);
@@ -4260,7 +4261,7 @@
         // request, i.e., the system default network.
         CallbackHandler cbHandler = new CallbackHandler(handler);
         sendRequestForNetwork(null /* NetworkCapabilities need */, networkCallback, 0,
-                REQUEST, TYPE_NONE, cbHandler);
+                TRACK_DEFAULT, TYPE_NONE, cbHandler);
     }
 
     /**
diff --git a/core/java/android/net/IConnectivityManager.aidl b/core/java/android/net/IConnectivityManager.aidl
index b32c98b..5e925b6 100644
--- a/core/java/android/net/IConnectivityManager.aidl
+++ b/core/java/android/net/IConnectivityManager.aidl
@@ -167,7 +167,7 @@
             in NetworkCapabilities nc, int score, in NetworkAgentConfig config,
             in int factorySerialNumber);
 
-    NetworkRequest requestNetwork(in NetworkCapabilities networkCapabilities,
+    NetworkRequest requestNetwork(in NetworkCapabilities networkCapabilities, int reqType,
             in Messenger messenger, int timeoutSec, in IBinder binder, int legacy,
             String callingPackageName, String callingAttributionTag);
 
diff --git a/services/core/java/com/android/server/ConnectivityService.java b/services/core/java/com/android/server/ConnectivityService.java
index 397eeb2..ad54312 100644
--- a/services/core/java/com/android/server/ConnectivityService.java
+++ b/services/core/java/com/android/server/ConnectivityService.java
@@ -5613,31 +5613,40 @@
 
     @Override
     public NetworkRequest requestNetwork(NetworkCapabilities networkCapabilities,
-            Messenger messenger, int timeoutMs, IBinder binder, int legacyType,
-            @NonNull String callingPackageName, @Nullable String callingAttributionTag) {
+            int reqTypeInt, Messenger messenger, int timeoutMs, IBinder binder,
+            int legacyType, @NonNull String callingPackageName,
+            @Nullable String callingAttributionTag) {
         if (legacyType != TYPE_NONE && !checkNetworkStackPermission()) {
             if (checkUnsupportedStartingFrom(Build.VERSION_CODES.M, callingPackageName)) {
                 throw new SecurityException("Insufficient permissions to specify legacy type");
             }
         }
         final int callingUid = mDeps.getCallingUid();
-        final NetworkRequest.Type type = (networkCapabilities == null)
-                ? NetworkRequest.Type.TRACK_DEFAULT
-                : NetworkRequest.Type.REQUEST;
-        // If the requested networkCapabilities is null, take them instead from
-        // the default network request. This allows callers to keep track of
-        // the system default network.
-        if (type == NetworkRequest.Type.TRACK_DEFAULT) {
-            networkCapabilities = createDefaultNetworkCapabilitiesForUid(callingUid);
-            enforceAccessPermission();
-        } else {
-            networkCapabilities = new NetworkCapabilities(networkCapabilities);
-            enforceNetworkRequestPermissions(networkCapabilities, callingPackageName,
-                    callingAttributionTag);
-            // TODO: this is incorrect. We mark the request as metered or not depending on the state
-            // of the app when the request is filed, but we never change the request if the app
-            // changes network state. http://b/29964605
-            enforceMeteredApnPolicy(networkCapabilities);
+        final NetworkRequest.Type reqType;
+        try {
+            reqType = NetworkRequest.Type.values()[reqTypeInt];
+        } catch (ArrayIndexOutOfBoundsException e) {
+            throw new IllegalArgumentException("Unsupported request type " + reqTypeInt);
+        }
+        switch (reqType) {
+            case TRACK_DEFAULT:
+                // If the request type is TRACK_DEFAULT, the passed {@code networkCapabilities}
+                // is unused and will be replaced by the one from the default network request.
+                // This allows callers to keep track of the system default network.
+                networkCapabilities = createDefaultNetworkCapabilitiesForUid(callingUid);
+                enforceAccessPermission();
+                break;
+            case REQUEST:
+                networkCapabilities = new NetworkCapabilities(networkCapabilities);
+                enforceNetworkRequestPermissions(networkCapabilities, callingPackageName,
+                        callingAttributionTag);
+                // TODO: this is incorrect. We mark the request as metered or not depending on
+                //  the state of the app when the request is filed, but we never change the
+                //  request if the app changes network state. http://b/29964605
+                enforceMeteredApnPolicy(networkCapabilities);
+                break;
+            default:
+                throw new IllegalArgumentException("Unsupported request type " + reqType);
         }
         ensureRequestableCapabilities(networkCapabilities);
         ensureSufficientPermissionsForRequest(networkCapabilities,
@@ -5656,7 +5665,7 @@
         ensureValid(networkCapabilities);
 
         NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, legacyType,
-                nextNetworkRequestId(), type);
+                nextNetworkRequestId(), reqType);
         NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder);
         if (DBG) log("requestNetwork for " + nri);
 
diff --git a/tests/net/java/android/net/ConnectivityManagerTest.java b/tests/net/java/android/net/ConnectivityManagerTest.java
index d74a621..f2dd27e 100644
--- a/tests/net/java/android/net/ConnectivityManagerTest.java
+++ b/tests/net/java/android/net/ConnectivityManagerTest.java
@@ -16,6 +16,7 @@
 
 package android.net;
 
+import static android.net.ConnectivityManager.TYPE_NONE;
 import static android.net.NetworkCapabilities.NET_CAPABILITY_CBS;
 import static android.net.NetworkCapabilities.NET_CAPABILITY_DUN;
 import static android.net.NetworkCapabilities.NET_CAPABILITY_FOTA;
@@ -31,16 +32,21 @@
 import static android.net.NetworkCapabilities.TRANSPORT_CELLULAR;
 import static android.net.NetworkCapabilities.TRANSPORT_ETHERNET;
 import static android.net.NetworkCapabilities.TRANSPORT_WIFI;
+import static android.net.NetworkRequest.Type.REQUEST;
+import static android.net.NetworkRequest.Type.TRACK_DEFAULT;
 
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
+import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.ArgumentMatchers.nullable;
 import static org.mockito.Mockito.any;
 import static org.mockito.Mockito.anyBoolean;
 import static org.mockito.Mockito.anyInt;
 import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.reset;
 import static org.mockito.Mockito.timeout;
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
@@ -49,9 +55,7 @@
 import android.app.PendingIntent;
 import android.content.Context;
 import android.content.pm.ApplicationInfo;
-import android.net.ConnectivityManager;
 import android.net.ConnectivityManager.NetworkCallback;
-import android.net.NetworkCapabilities;
 import android.os.Build.VERSION_CODES;
 import android.os.Bundle;
 import android.os.Handler;
@@ -213,9 +217,8 @@
         ArgumentCaptor<Messenger> captor = ArgumentCaptor.forClass(Messenger.class);
 
         // register callback
-        when(mService.requestNetwork(
-                any(), captor.capture(), anyInt(), any(), anyInt(), any(), nullable(String.class)))
-                .thenReturn(request);
+        when(mService.requestNetwork(any(), anyInt(), captor.capture(), anyInt(), any(), anyInt(),
+                any(), nullable(String.class))).thenReturn(request);
         manager.requestNetwork(request, callback, handler);
 
         // callback triggers
@@ -242,9 +245,8 @@
         ArgumentCaptor<Messenger> captor = ArgumentCaptor.forClass(Messenger.class);
 
         // register callback
-        when(mService.requestNetwork(
-                any(), captor.capture(), anyInt(), any(), anyInt(), any(), nullable(String.class)))
-                .thenReturn(req1);
+        when(mService.requestNetwork(any(), anyInt(), captor.capture(), anyInt(), any(), anyInt(),
+                any(), nullable(String.class))).thenReturn(req1);
         manager.requestNetwork(req1, callback, handler);
 
         // callback triggers
@@ -261,9 +263,8 @@
         verify(callback, timeout(100).times(0)).onLosing(any(), anyInt());
 
         // callback can be registered again
-        when(mService.requestNetwork(
-                any(), captor.capture(), anyInt(), any(), anyInt(), any(), nullable(String.class)))
-                .thenReturn(req2);
+        when(mService.requestNetwork(any(), anyInt(), captor.capture(), anyInt(), any(), anyInt(),
+                any(), nullable(String.class))).thenReturn(req2);
         manager.requestNetwork(req2, callback, handler);
 
         // callback triggers
@@ -286,7 +287,7 @@
         info.targetSdkVersion = VERSION_CODES.N_MR1 + 1;
 
         when(mCtx.getApplicationInfo()).thenReturn(info);
-        when(mService.requestNetwork(any(), any(), anyInt(), any(), anyInt(), any(),
+        when(mService.requestNetwork(any(), anyInt(), any(), anyInt(), any(), anyInt(), any(),
                 nullable(String.class))).thenReturn(request);
 
         Handler handler = new Handler(Looper.getMainLooper());
@@ -340,6 +341,35 @@
         }
     }
 
+    @Test
+    public void testRequestType() throws Exception {
+        final String testPkgName = "MyPackage";
+        final ConnectivityManager manager = new ConnectivityManager(mCtx, mService);
+        when(mCtx.getOpPackageName()).thenReturn(testPkgName);
+        final NetworkRequest request = makeRequest(1);
+        final NetworkCallback callback = new ConnectivityManager.NetworkCallback();
+
+        manager.requestNetwork(request, callback);
+        verify(mService).requestNetwork(eq(request.networkCapabilities),
+                eq(REQUEST.ordinal()), any(), anyInt(), any(), eq(TYPE_NONE),
+                eq(testPkgName), eq(null));
+        reset(mService);
+
+        // Verify that register network callback does not calls requestNetwork at all.
+        manager.registerNetworkCallback(request, callback);
+        verify(mService, never()).requestNetwork(any(), anyInt(), any(), anyInt(), any(),
+                anyInt(), any(), any());
+        verify(mService).listenForNetwork(eq(request.networkCapabilities), any(), any(),
+                eq(testPkgName));
+        reset(mService);
+
+        manager.registerDefaultNetworkCallback(callback);
+        verify(mService).requestNetwork(eq(null),
+                eq(TRACK_DEFAULT.ordinal()), any(), anyInt(), any(), eq(TYPE_NONE),
+                eq(testPkgName), eq(null));
+        reset(mService);
+    }
+
     static Message makeMessage(NetworkRequest req, int messageType) {
         Bundle bundle = new Bundle();
         bundle.putParcelable(NetworkRequest.class.getSimpleName(), req);
diff --git a/tests/net/java/com/android/server/ConnectivityServiceTest.java b/tests/net/java/com/android/server/ConnectivityServiceTest.java
index 9421acd..e2cf90d 100644
--- a/tests/net/java/com/android/server/ConnectivityServiceTest.java
+++ b/tests/net/java/com/android/server/ConnectivityServiceTest.java
@@ -3226,8 +3226,8 @@
             NetworkCapabilities networkCapabilities = new NetworkCapabilities();
             networkCapabilities.addTransportType(TRANSPORT_WIFI)
                     .setNetworkSpecifier(new MatchAllNetworkSpecifier());
-            mService.requestNetwork(networkCapabilities, null, 0, null,
-                    ConnectivityManager.TYPE_WIFI, mContext.getPackageName(),
+            mService.requestNetwork(networkCapabilities, NetworkRequest.Type.REQUEST.ordinal(),
+                    null, 0, null, ConnectivityManager.TYPE_WIFI, mContext.getPackageName(),
                     getAttributionTag());
         });