diff --git a/tests/cts/net/api23Test/Android.bp b/tests/cts/net/api23Test/Android.bp
index 48161cf..ffe854e 100644
--- a/tests/cts/net/api23Test/Android.bp
+++ b/tests/cts/net/api23Test/Android.bp
@@ -31,6 +31,7 @@
     static_libs: [
         "core-tests-support",
         "compatibility-device-util-axt",
+        "cts-net-utils",
         "ctstestrunner-axt",
         "ctstestserver",
         "mockwebserver",
diff --git a/tests/cts/net/api23Test/src/android/net/cts/api23test/ConnectivityManagerApi23Test.java b/tests/cts/net/api23Test/src/android/net/cts/api23test/ConnectivityManagerApi23Test.java
index f38490e..cdb66e3 100644
--- a/tests/cts/net/api23Test/src/android/net/cts/api23test/ConnectivityManagerApi23Test.java
+++ b/tests/cts/net/api23Test/src/android/net/cts/api23test/ConnectivityManagerApi23Test.java
@@ -25,58 +25,33 @@
 import android.content.IntentFilter;
 import android.content.pm.PackageManager;
 import android.net.ConnectivityManager;
-import android.net.Network;
-import android.net.NetworkCapabilities;
-import android.net.NetworkInfo;
-import android.net.NetworkInfo.State;
-import android.net.NetworkRequest;
-import android.net.wifi.WifiManager;
+import android.net.cts.util.CtsNetUtils;
 import android.os.Looper;
-import android.system.Os;
-import android.system.OsConstants;
 import android.test.AndroidTestCase;
 import android.util.Log;
 
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.OutputStream;
-import java.net.InetSocketAddress;
-import java.net.Socket;
-import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.LinkedBlockingQueue;
 import java.util.concurrent.TimeUnit;
 
 public class ConnectivityManagerApi23Test extends AndroidTestCase {
     private static final String TAG = ConnectivityManagerApi23Test.class.getSimpleName();
-
-    private static final String TEST_HOST = "connectivitycheck.gstatic.com";
-    private static final int SOCKET_TIMEOUT_MS = 2000;
     private static final int SEND_BROADCAST_TIMEOUT = 30000;
-    private static final int HTTP_PORT = 80;
     // Intent string to get the number of wifi CONNECTIVITY_ACTION callbacks the test app has seen
     public static final String GET_WIFI_CONNECTIVITY_ACTION_COUNT =
             "android.net.cts.appForApi23.getWifiConnectivityActionCount";
     // Action sent to ConnectivityActionReceiver when a network callback is sent via PendingIntent.
-    private static final String NETWORK_CALLBACK_ACTION =
-            "ConnectivityManagerTest.NetworkCallbackAction";
-    private static final String HTTP_REQUEST =
-            "GET /generate_204 HTTP/1.0\r\n" +
-                    "Host: " + TEST_HOST + "\r\n" +
-                    "Connection: keep-alive\r\n\r\n";
 
     private Context mContext;
-    private ConnectivityManager mCm;
-    private WifiManager mWifiManager;
     private PackageManager mPackageManager;
+    private CtsNetUtils mCtsNetUtils;
 
     @Override
     protected void setUp() throws Exception {
         super.setUp();
         Looper.prepare();
         mContext = getContext();
-        mCm = (ConnectivityManager) mContext.getSystemService(Context.CONNECTIVITY_SERVICE);
-        mWifiManager = (WifiManager) mContext.getSystemService(Context.WIFI_SERVICE);
         mPackageManager = mContext.getPackageManager();
+        mCtsNetUtils = new CtsNetUtils(mContext);
     }
 
     /**
@@ -89,7 +64,7 @@
         }
         ConnectivityReceiver.prepare();
 
-        toggleWifi();
+        mCtsNetUtils.toggleWifi();
 
         // The connectivity broadcast has been sent; push through a terminal broadcast
         // to wait for in the receive to confirm it didn't see the connectivity change.
@@ -112,7 +87,7 @@
                 .addFlags(Intent.FLAG_ACTIVITY_NEW_TASK));
         Thread.sleep(200);
 
-        toggleWifi();
+        mCtsNetUtils.toggleWifi();
 
         Intent getConnectivityCount = new Intent(GET_WIFI_CONNECTIVITY_ACTION_COUNT);
         assertEquals(2, sendOrderedBroadcastAndReturnResultCode(
@@ -130,7 +105,7 @@
         filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
         mContext.registerReceiver(receiver, filter);
 
-        toggleWifi();
+        mCtsNetUtils.toggleWifi();
         Intent finalIntent = new Intent(ConnectivityReceiver.FINAL_ACTION);
         finalIntent.setClass(mContext, ConnectivityReceiver.class);
         mContext.sendBroadcast(finalIntent);
@@ -138,19 +113,6 @@
         assertTrue(ConnectivityReceiver.waitForBroadcast());
     }
 
-    // Toggle WiFi twice, leaving it in the state it started in
-    private void toggleWifi() {
-        if (mWifiManager.isWifiEnabled()) {
-            Network wifiNetwork = getWifiNetwork();
-            disconnectFromWifi(wifiNetwork);
-            connectToWifi();
-        } else {
-            connectToWifi();
-            Network wifiNetwork = getWifiNetwork();
-            disconnectFromWifi(wifiNetwork);
-        }
-    }
-
     private int sendOrderedBroadcastAndReturnResultCode(
             Intent intent, int timeoutMs) throws InterruptedException {
         final LinkedBlockingQueue<Integer> result = new LinkedBlockingQueue<>(1);
@@ -167,233 +129,4 @@
         return resultCode;
     }
 
-    private Network getWifiNetwork() {
-        TestNetworkCallback callback = new TestNetworkCallback();
-        mCm.registerNetworkCallback(makeWifiNetworkRequest(), callback);
-        Network network = null;
-        try {
-            network = callback.waitForAvailable();
-        } catch (InterruptedException e) {
-            fail("NetworkCallback wait was interrupted.");
-        } finally {
-            mCm.unregisterNetworkCallback(callback);
-        }
-        assertNotNull("Cannot find Network for wifi. Is wifi connected?", network);
-        return network;
-    }
-
-    /** Disable WiFi and wait for it to become disconnected from the network. */
-    private void disconnectFromWifi(Network wifiNetworkToCheck) {
-        final TestNetworkCallback callback = new TestNetworkCallback();
-        mCm.registerNetworkCallback(makeWifiNetworkRequest(), callback);
-        Network lostWifiNetwork = null;
-
-        ConnectivityActionReceiver receiver = new ConnectivityActionReceiver(
-                ConnectivityManager.TYPE_WIFI, NetworkInfo.State.DISCONNECTED);
-        IntentFilter filter = new IntentFilter();
-        filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
-        mContext.registerReceiver(receiver, filter);
-
-        // Assert that we can establish a TCP connection on wifi.
-        Socket wifiBoundSocket = null;
-        if (wifiNetworkToCheck != null) {
-            try {
-                wifiBoundSocket = getBoundSocket(wifiNetworkToCheck, TEST_HOST, HTTP_PORT);
-                testHttpRequest(wifiBoundSocket);
-            } catch (IOException e) {
-                fail("HTTP request before wifi disconnected failed with: " + e);
-            }
-        }
-
-        boolean disconnected = false;
-        try {
-            assertTrue(mWifiManager.setWifiEnabled(false));
-            // Ensure we get both an onLost callback and a CONNECTIVITY_ACTION.
-            lostWifiNetwork = callback.waitForLost();
-            assertNotNull(lostWifiNetwork);
-            disconnected = receiver.waitForState();
-        } catch (InterruptedException ex) {
-            fail("disconnectFromWifi was interrupted");
-        } finally {
-            mCm.unregisterNetworkCallback(callback);
-            mContext.unregisterReceiver(receiver);
-        }
-
-        assertTrue("Wifi failed to reach DISCONNECTED state.", disconnected);
-
-        // Check that the socket is closed when wifi disconnects.
-        if (wifiBoundSocket != null) {
-            try {
-                testHttpRequest(wifiBoundSocket);
-                fail("HTTP request should not succeed after wifi disconnects");
-            } catch (IOException expected) {
-                assertEquals(Os.strerror(OsConstants.ECONNABORTED), expected.getMessage());
-            }
-        }
-    }
-
-    /** Enable WiFi and wait for it to become connected to a network. */
-    private Network connectToWifi() {
-        final TestNetworkCallback callback = new TestNetworkCallback();
-        mCm.registerNetworkCallback(makeWifiNetworkRequest(), callback);
-        Network wifiNetwork = null;
-
-        ConnectivityActionReceiver receiver = new ConnectivityActionReceiver(
-                ConnectivityManager.TYPE_WIFI, NetworkInfo.State.CONNECTED);
-        IntentFilter filter = new IntentFilter();
-        filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
-        mContext.registerReceiver(receiver, filter);
-
-        boolean connected = false;
-        try {
-            assertTrue(mWifiManager.setWifiEnabled(true));
-            // Ensure we get both an onAvailable callback and a CONNECTIVITY_ACTION.
-            wifiNetwork = callback.waitForAvailable();
-            assertNotNull(wifiNetwork);
-            connected = receiver.waitForState();
-        } catch (InterruptedException ex) {
-            fail("connectToWifi was interrupted");
-        } finally {
-            mCm.unregisterNetworkCallback(callback);
-            mContext.unregisterReceiver(receiver);
-        }
-
-        assertTrue("Wifi must be configured to connect to an access point for this test.",
-                connected);
-        return wifiNetwork;
-    }
-
-    private NetworkRequest makeWifiNetworkRequest() {
-        return new NetworkRequest.Builder()
-                .addTransportType(NetworkCapabilities.TRANSPORT_WIFI)
-                .build();
-    }
-
-    private void testHttpRequest(Socket s) throws IOException {
-        OutputStream out = s.getOutputStream();
-        InputStream in = s.getInputStream();
-
-        final byte[] requestBytes = HTTP_REQUEST.getBytes("UTF-8");
-        byte[] responseBytes = new byte[4096];
-        out.write(requestBytes);
-        in.read(responseBytes);
-        assertTrue(new String(responseBytes, "UTF-8").startsWith("HTTP/1.0 204 No Content\r\n"));
-    }
-
-    private Socket getBoundSocket(Network network, String host, int port) throws IOException {
-        InetSocketAddress addr = new InetSocketAddress(host, port);
-        Socket s = network.getSocketFactory().createSocket();
-        try {
-            s.setSoTimeout(SOCKET_TIMEOUT_MS);
-            s.connect(addr, SOCKET_TIMEOUT_MS);
-        } catch (IOException e) {
-            s.close();
-            throw e;
-        }
-        return s;
-    }
-
-    /**
-     * Receiver that captures the last connectivity change's network type and state. Recognizes
-     * both {@code CONNECTIVITY_ACTION} and {@code NETWORK_CALLBACK_ACTION} intents.
-     */
-    private class ConnectivityActionReceiver extends BroadcastReceiver {
-
-        private final CountDownLatch mReceiveLatch = new CountDownLatch(1);
-
-        private final int mNetworkType;
-        private final NetworkInfo.State mNetState;
-
-        ConnectivityActionReceiver(int networkType, NetworkInfo.State netState) {
-            mNetworkType = networkType;
-            mNetState = netState;
-        }
-
-        public void onReceive(Context context, Intent intent) {
-            String action = intent.getAction();
-            NetworkInfo networkInfo = null;
-
-            // When receiving ConnectivityManager.CONNECTIVITY_ACTION, the NetworkInfo parcelable
-            // is stored in EXTRA_NETWORK_INFO. With a NETWORK_CALLBACK_ACTION, the Network is
-            // sent in EXTRA_NETWORK and we need to ask the ConnectivityManager for the NetworkInfo.
-            if (ConnectivityManager.CONNECTIVITY_ACTION.equals(action)) {
-                networkInfo = intent.getExtras()
-                        .getParcelable(ConnectivityManager.EXTRA_NETWORK_INFO);
-                assertNotNull("ConnectivityActionReceiver expected EXTRA_NETWORK_INFO", networkInfo);
-            } else if (NETWORK_CALLBACK_ACTION.equals(action)) {
-                Network network = intent.getExtras()
-                        .getParcelable(ConnectivityManager.EXTRA_NETWORK);
-                assertNotNull("ConnectivityActionReceiver expected EXTRA_NETWORK", network);
-                networkInfo = mCm.getNetworkInfo(network);
-                if (networkInfo == null) {
-                    // When disconnecting, it seems like we get an intent sent with an invalid
-                    // Network; that is, by the time we call ConnectivityManager.getNetworkInfo(),
-                    // it is invalid. Ignore these.
-                    Log.i(TAG, "ConnectivityActionReceiver NETWORK_CALLBACK_ACTION ignoring "
-                            + "invalid network");
-                    return;
-                }
-            } else {
-                fail("ConnectivityActionReceiver received unxpected intent action: " + action);
-            }
-
-            assertNotNull("ConnectivityActionReceiver didn't find NetworkInfo", networkInfo);
-            int networkType = networkInfo.getType();
-            State networkState = networkInfo.getState();
-            Log.i(TAG, "Network type: " + networkType + " state: " + networkState);
-            if (networkType == mNetworkType && networkInfo.getState() == mNetState) {
-                mReceiveLatch.countDown();
-            }
-        }
-
-        public boolean waitForState() throws InterruptedException {
-            return mReceiveLatch.await(30, TimeUnit.SECONDS);
-        }
-    }
-
-    /**
-     * Callback used in testRegisterNetworkCallback that allows caller to block on
-     * {@code onAvailable}.
-     */
-    private static class TestNetworkCallback extends ConnectivityManager.NetworkCallback {
-        private final CountDownLatch mAvailableLatch = new CountDownLatch(1);
-        private final CountDownLatch mLostLatch = new CountDownLatch(1);
-        private final CountDownLatch mUnavailableLatch = new CountDownLatch(1);
-
-        public Network currentNetwork;
-        public Network lastLostNetwork;
-
-        public Network waitForAvailable() throws InterruptedException {
-            return mAvailableLatch.await(30, TimeUnit.SECONDS) ? currentNetwork : null;
-        }
-
-        public Network waitForLost() throws InterruptedException {
-            return mLostLatch.await(30, TimeUnit.SECONDS) ? lastLostNetwork : null;
-        }
-
-        public boolean waitForUnavailable() throws InterruptedException {
-            return mUnavailableLatch.await(2, TimeUnit.SECONDS);
-        }
-
-
-        @Override
-        public void onAvailable(Network network) {
-            currentNetwork = network;
-            mAvailableLatch.countDown();
-        }
-
-        @Override
-        public void onLost(Network network) {
-            lastLostNetwork = network;
-            if (network.equals(currentNetwork)) {
-                currentNetwork = null;
-            }
-            mLostLatch.countDown();
-        }
-
-        @Override
-        public void onUnavailable() {
-            mUnavailableLatch.countDown();
-        }
-    }
 }
\ No newline at end of file