diff --git a/core/java/android/net/NetworkAgent.java b/core/java/android/net/NetworkAgent.java
index 80e5b91ecc..95e24accf6 100644
--- a/core/java/android/net/NetworkAgent.java
+++ b/core/java/android/net/NetworkAgent.java
@@ -120,6 +120,18 @@ public abstract class NetworkAgent extends Handler {
      */
     public static final int EVENT_UNBLOCK_ADDRESS_FAMILY = BASE + 8;
 
+    /**
+     * Sent by ConnectivitySerice to the NetworkAgent to inform the agent of the
+     * networks status - whether we could use the network or could not, due to
+     * either a bad network configuration (no internet link) or captive portal.
+     *
+     * arg1 = either {@code VALID_NETWORK} or {@code INVALID_NETWORK}
+     */
+    public static final int CMD_REPORT_NETWORK_STATUS = BASE + 9;
+
+    public static final int VALID_NETWORK = 1;
+    public static final int INVALID_NETWORK = 2;
+
     public NetworkAgent(Looper looper, Context context, String logTag, NetworkInfo ni,
             NetworkCapabilities nc, LinkProperties lp, int score) {
         this(looper, context, logTag, ni, nc, lp, score, null);
@@ -181,6 +193,14 @@ public abstract class NetworkAgent extends Handler {
                 log("Unhandled Message " + msg);
                 break;
             }
+            case CMD_REPORT_NETWORK_STATUS: {
+                if (VDBG) {
+                    log("CMD_REPORT_NETWORK_STATUS(" +
+                            (msg.arg1 == VALID_NETWORK ? "VALID)" : "INVALID)"));
+                }
+                networkStatus(msg.arg1);
+                break;
+            }
         }
     }
 
@@ -268,6 +288,24 @@ public abstract class NetworkAgent extends Handler {
      */
     abstract protected void unwanted();
 
+    /**
+     * Called when the system determines the usefulness of this network.
+     *
+     * Networks claiming internet connectivity will have their internet
+     * connectivity verified.
+     *
+     * Currently there are two possible values:
+     * {@code VALID_NETWORK} if the system is happy with the connection,
+     * {@code INVALID_NETWORK} if the system is not happy.
+     * TODO - add indications of captive portal-ness and related success/failure,
+     * ie, CAPTIVE_SUCCESS_NETWORK, CAPTIVE_NETWORK for successful login and detection
+     *
+     * This may be called multiple times as the network status changes and may
+     * generate false negatives if we lose ip connectivity before the link is torn down.
+     */
+    protected void networkStatus(int status) {
+    }
+
     protected void log(String s) {
         Log.d(LOG_TAG, "NetworkAgent: " + s);
     }
diff --git a/services/core/java/com/android/server/ConnectivityService.java b/services/core/java/com/android/server/ConnectivityService.java
index 55d8c09da0..c2d92f3d18 100644
--- a/services/core/java/com/android/server/ConnectivityService.java
+++ b/services/core/java/com/android/server/ConnectivityService.java
@@ -1935,6 +1935,11 @@ public class ConnectivityService extends IConnectivityManager.Stub {
                             rematchNetworkAndRequests(nai);
                         }
                         updateInetCondition(nai, valid);
+                        // Let the NetworkAgent know the state of its network
+                        nai.asyncChannel.sendMessage(
+                                android.net.NetworkAgent.CMD_REPORT_NETWORK_STATUS,
+                                (valid ? NetworkAgent.VALID_NETWORK : NetworkAgent.INVALID_NETWORK),
+                                0, null);
                     }
                     break;
                 }
@@ -2517,6 +2522,7 @@ public class ConnectivityService extends IConnectivityManager.Stub {
             nai = mNetworkForNetId.get(network.netId);
         }
         if (nai == null) return;
+        if (DBG) log("reportBadNetwork(" + nai.name() + ") by " + uid);
         synchronized (nai) {
             if (isNetworkBlocked(nai, uid)) return;