diff --git a/framework/src/android/net/NetworkRequest.java b/framework/src/android/net/NetworkRequest.java
index 89572b3..4cc3c61 100644
--- a/framework/src/android/net/NetworkRequest.java
+++ b/framework/src/android/net/NetworkRequest.java
@@ -193,6 +193,16 @@
      *       callbacks about the single, highest scoring current network
      *       (if any) that matches the specified NetworkCapabilities, or
      *
+     *     - RESERVATION requests behave identically to those of type REQUEST.
+     *       For example, unlike LISTEN, they cause networks to remain
+     *       connected, and they match exactly one network (the best one).
+     *       A RESERVATION generates a unique reservationId in its
+     *       NetworkCapabilities by copying the requestId which affects
+     *       matching. A NetworkProvider can register a "blanket" NetworkOffer
+     *       with reservationId = MATCH_ALL_RESERVATIONS to indicate that it
+     *       is capable of generating NetworkOffers in response to RESERVATION
+     *       requests.
+     *
      *     - TRACK_DEFAULT, which causes the framework to issue callbacks for
      *       the single, highest scoring current network (if any) that will
      *       be chosen for an app, but which cannot cause the framework to
@@ -229,6 +239,7 @@
         BACKGROUND_REQUEST,
         TRACK_SYSTEM_DEFAULT,
         LISTEN_FOR_BEST,
+        RESERVATION,
     };
 
     /**
@@ -703,7 +714,7 @@
      * @hide
      */
     public boolean isRequest() {
-        return type == Type.REQUEST || type == Type.BACKGROUND_REQUEST;
+        return type == Type.REQUEST || type == Type.BACKGROUND_REQUEST || type == Type.RESERVATION;
     }
 
     /**
diff --git a/service/src/com/android/server/ConnectivityService.java b/service/src/com/android/server/ConnectivityService.java
index 4c0d7b3..bad7246 100644
--- a/service/src/com/android/server/ConnectivityService.java
+++ b/service/src/com/android/server/ConnectivityService.java
@@ -8415,6 +8415,7 @@
                 enforceNetworkStackOrSettingsPermission();
                 // Fall-through since other checks are the same with normal requests.
             case REQUEST:
+            case RESERVATION:
                 networkCapabilities = new NetworkCapabilities(networkCapabilities);
                 enforceNetworkRequestPermissions(networkCapabilities, callingPackageName,
                         callingAttributionTag, callingUid);
diff --git a/tests/unit/java/com/android/server/connectivityservice/CSNetworkReservationTest.kt b/tests/unit/java/com/android/server/connectivityservice/CSNetworkReservationTest.kt
new file mode 100644
index 0000000..db3bbb7
--- /dev/null
+++ b/tests/unit/java/com/android/server/connectivityservice/CSNetworkReservationTest.kt
@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server
+
+import android.net.ConnectivityManager
+import android.net.ConnectivityManager.NetworkCallback
+import android.net.NetworkCapabilities
+import android.net.NetworkCapabilities.NET_CAPABILITY_NOT_CONGESTED
+import android.net.NetworkCapabilities.NET_CAPABILITY_NOT_VCN_MANAGED
+import android.net.NetworkCapabilities.NET_CAPABILITY_INTERNET
+import android.net.NetworkCapabilities.TRANSPORT_ETHERNET
+import android.net.NetworkProvider
+import android.net.NetworkRequest
+import android.net.NetworkScore
+import android.os.Build
+import android.os.Messenger
+import android.os.Process.INVALID_UID
+import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo
+import com.android.testutils.DevSdkIgnoreRunner
+import com.android.testutils.TestableNetworkOfferCallback
+import org.junit.Test
+import org.junit.runner.RunWith
+
+
+private val ETHERNET_SCORE = NetworkScore.Builder().build()
+private val ETHERNET_CAPS = NetworkCapabilities.Builder()
+        .addTransportType(TRANSPORT_ETHERNET)
+        .addCapability(NET_CAPABILITY_INTERNET)
+        .addCapability(NET_CAPABILITY_NOT_CONGESTED)
+        .addCapability(NET_CAPABILITY_NOT_VCN_MANAGED)
+        .build()
+
+private const val TIMEOUT_MS = 5_000L
+private const val NO_CB_TIMEOUT_MS = 200L
+
+@RunWith(DevSdkIgnoreRunner::class)
+@IgnoreUpTo(Build.VERSION_CODES.R)
+class CSNetworkReservationTest : CSTest() {
+    // TODO: remove this helper once reserveNetwork is added.
+    // NetworkCallback does not currently do anything. It's just here so the API stays consistent
+    // with the eventual ConnectivityManager API.
+    private fun ConnectivityManager.reserveNetwork(req: NetworkRequest, cb: NetworkCallback) {
+        service.requestNetwork(INVALID_UID, req.networkCapabilities,
+                NetworkRequest.Type.RESERVATION.ordinal, Messenger(csHandler), 0 /* timeout */,
+                null /* binder */, ConnectivityManager.TYPE_NONE, NetworkCallback.FLAG_NONE,
+                context.packageName, context.attributionTag, NetworkCallback.DECLARED_METHODS_ALL)
+    }
+
+    @Test
+    fun testReservationTriggersOnNetworkNeeded() {
+        val provider = NetworkProvider(context, csHandlerThread.looper, "Ethernet provider")
+        val offerCb = TestableNetworkOfferCallback(TIMEOUT_MS, NO_CB_TIMEOUT_MS)
+
+        cm.registerNetworkProvider(provider)
+        provider.registerNetworkOffer(ETHERNET_SCORE, ETHERNET_CAPS, {r -> r.run()}, offerCb)
+
+        // TODO: add reservationId to offer, so it doesn't match the default request.
+        offerCb.expectOnNetworkNeeded(ETHERNET_CAPS)
+
+        val req = NetworkRequest.Builder().addTransportType(TRANSPORT_ETHERNET).build()
+        val cb = NetworkCallback()
+        cm.reserveNetwork(req, cb)
+
+        offerCb.expectOnNetworkNeeded(req.networkCapabilities)
+
+        // TODO: also test onNetworkUnneeded is called once ConnectivityManager supports the
+        // reserveNetwork API.
+    }
+}