diff --git a/core/java/android/net/IConnectivityManager.aidl b/core/java/android/net/IConnectivityManager.aidl
index 186196b..3e9e7fa 100644
--- a/core/java/android/net/IConnectivityManager.aidl
+++ b/core/java/android/net/IConnectivityManager.aidl
@@ -18,6 +18,7 @@
 
 import android.app.PendingIntent;
 import android.net.ConnectionInfo;
+import android.net.IConnectivityDiagnosticsCallback;
 import android.net.LinkProperties;
 import android.net.Network;
 import android.net.NetworkAgentConfig;
@@ -211,5 +212,9 @@
     boolean isCallerCurrentAlwaysOnVpnApp();
     boolean isCallerCurrentAlwaysOnVpnLockdownApp();
 
+    void registerConnectivityDiagnosticsCallback(in IConnectivityDiagnosticsCallback callback,
+            in NetworkRequest request);
+    void unregisterConnectivityDiagnosticsCallback(in IConnectivityDiagnosticsCallback callback);
+
     IBinder startOrGetTestNetworkService();
 }
diff --git a/services/core/java/com/android/server/ConnectivityService.java b/services/core/java/com/android/server/ConnectivityService.java
index 11f0a04..0981cd8 100644
--- a/services/core/java/com/android/server/ConnectivityService.java
+++ b/services/core/java/com/android/server/ConnectivityService.java
@@ -66,6 +66,7 @@
 import android.net.ConnectionInfo;
 import android.net.ConnectivityManager;
 import android.net.ICaptivePortal;
+import android.net.IConnectivityDiagnosticsCallback;
 import android.net.IConnectivityManager;
 import android.net.IDnsResolver;
 import android.net.IIpConnectivityMetrics;
@@ -7307,4 +7308,20 @@
             return mTNS;
         }
     }
+
+    @Override
+    public void registerConnectivityDiagnosticsCallback(
+            @NonNull IConnectivityDiagnosticsCallback callback, @NonNull NetworkRequest request) {
+        // TODO(b/146444622): implement register IConnectivityDiagnosticsCallback functionality
+        throw new UnsupportedOperationException(
+                "registerConnectivityDiagnosticsCallback not yet implemented");
+    }
+
+    @Override
+    public void unregisterConnectivityDiagnosticsCallback(
+            @NonNull IConnectivityDiagnosticsCallback callback) {
+        // TODO(b/146444622): implement register IConnectivityDiagnosticsCallback functionality
+        throw new UnsupportedOperationException(
+                "unregisterConnectivityDiagnosticsCallback not yet implemented");
+    }
 }