Get NetworkCapabilities from NetworkCallback

Register network callback for all networks and record
NetworkCapabilities for every networks. Once onDnsEvent is
triggered, use the netId it passes in to find the corresponding
NetworkCapabilities instead of using netId to create a Network
object(hidden API) then get the NetworkCapabilities by
ConnectivityManager#getNetworkCapabilities.

Bug: 182963397
Test: m
Test: atest IpConnectivityMetricsTest
Test: atest NetdEventListenerServiceTest
Change-Id: I91d68ca33253831b78def1ddeb074ba944a5d6ad

tests/net/java/com/android/server/connectivity/IpConnectivityMetricsTest.java

@@ -22,7 +22,9 @@ import static android.net.metrics.INetdEventListener.EVENT_GETHOSTBYNAME;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.fail;
+import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
 import android.content.Context;
@@ -56,6 +58,7 @@ import com.android.server.connectivity.metrics.nano.IpConnectivityLogClass;
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
+import org.mockito.ArgumentCaptor;
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
 
@@ -80,6 +83,12 @@ public class IpConnectivityMetricsTest {
 
     IpConnectivityMetrics mService;
     NetdEventListenerService mNetdListener;
+    final NetworkCapabilities mNcWifi = new NetworkCapabilities.Builder()
+            .addTransportType(NetworkCapabilities.TRANSPORT_WIFI)
+            .build();
+    final NetworkCapabilities mNcCell = new NetworkCapabilities.Builder()
+            .addTransportType(NetworkCapabilities.TRANSPORT_CELLULAR)
+            .build();
 
     @Before
     public void setUp() {
@@ -263,14 +272,6 @@ public class IpConnectivityMetricsTest {
         // TODO: instead of comparing textpb to textpb, parse textpb and compare proto to proto.
         IpConnectivityLog logger = new IpConnectivityLog(mService.impl);
 
-        NetworkCapabilities ncWifi = new NetworkCapabilities();
-        NetworkCapabilities ncCell = new NetworkCapabilities();
-        ncWifi.addTransportType(NetworkCapabilities.TRANSPORT_WIFI);
-        ncCell.addTransportType(NetworkCapabilities.TRANSPORT_CELLULAR);
-
-        when(mCm.getNetworkCapabilities(new Network(100))).thenReturn(ncWifi);
-        when(mCm.getNetworkCapabilities(new Network(101))).thenReturn(ncCell);
-
         ApfStats apfStats = new ApfStats.Builder()
                 .setDurationMs(45000)
                 .setReceivedRas(10)
@@ -584,11 +585,21 @@ public class IpConnectivityMetricsTest {
         return buffer.toString();
     }
 
-    void connectEvent(int netid, int error, int latencyMs, String ipAddr) throws Exception {
+    private void setCapabilities(int netId) {
-        mNetdListener.onConnectEvent(netid, error, latencyMs, ipAddr, 80, 1);
+        final ArgumentCaptor<ConnectivityManager.NetworkCallback> networkCallback =
+                ArgumentCaptor.forClass(ConnectivityManager.NetworkCallback.class);
+        verify(mCm).registerNetworkCallback(any(), networkCallback.capture());
+        networkCallback.getValue().onCapabilitiesChanged(new Network(netId),
+                netId == 100 ? mNcWifi : mNcCell);
+    }
+
+    void connectEvent(int netId, int error, int latencyMs, String ipAddr) throws Exception {
+        setCapabilities(netId);
+        mNetdListener.onConnectEvent(netId, error, latencyMs, ipAddr, 80, 1);
     }
 
     void dnsEvent(int netId, int type, int result, int latency) throws Exception {
+        setCapabilities(netId);
         mNetdListener.onDnsEvent(netId, type, result, latency, "", null, 0, 0);
     }
 

tests/net/java/com/android/server/connectivity/NetdEventListenerServiceTest.java

@@ -23,8 +23,9 @@ import static com.android.testutils.MiscAsserts.assertStringContains;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.fail;
+import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.Mockito.mock;
-import static org.mockito.Mockito.when;
+import static org.mockito.Mockito.verify;
 
 import android.content.Context;
 import android.net.ConnectivityManager;
@@ -42,6 +43,7 @@ import com.android.server.connectivity.metrics.nano.IpConnectivityLogClass.IpCon
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
+import org.mockito.ArgumentCaptor;
 
 import java.io.FileOutputStream;
 import java.io.PrintWriter;
@@ -61,18 +63,16 @@ public class NetdEventListenerServiceTest {
 
     NetdEventListenerService mService;
     ConnectivityManager mCm;
+    final NetworkCapabilities mNcWifi = new NetworkCapabilities.Builder()
+            .addTransportType(NetworkCapabilities.TRANSPORT_WIFI)
+            .build();
+    final NetworkCapabilities mNcCell = new NetworkCapabilities.Builder()
+            .addTransportType(NetworkCapabilities.TRANSPORT_CELLULAR)
+            .build();
 
     @Before
     public void setUp() {
-        NetworkCapabilities ncWifi = new NetworkCapabilities();
-        NetworkCapabilities ncCell = new NetworkCapabilities();
-        ncWifi.addTransportType(NetworkCapabilities.TRANSPORT_WIFI);
-        ncCell.addTransportType(NetworkCapabilities.TRANSPORT_CELLULAR);
-
         mCm = mock(ConnectivityManager.class);
-        when(mCm.getNetworkCapabilities(new Network(100))).thenReturn(ncWifi);
-        when(mCm.getNetworkCapabilities(new Network(101))).thenReturn(ncCell);
-
         mService = new NetdEventListenerService(mCm);
     }
 
@@ -470,7 +470,16 @@ public class NetdEventListenerServiceTest {
         assertEquals(want, got);
     }
 
+    private void setCapabilities(int netId) {
+        final ArgumentCaptor<ConnectivityManager.NetworkCallback> networkCallback =
+                ArgumentCaptor.forClass(ConnectivityManager.NetworkCallback.class);
+        verify(mCm).registerNetworkCallback(any(), networkCallback.capture());
+        networkCallback.getValue().onCapabilitiesChanged(new Network(netId),
+                netId == 100 ? mNcWifi : mNcCell);
+    }
+
     Thread connectEventAction(int netId, int error, int latencyMs, String ipAddr) {
+        setCapabilities(netId);
         return new Thread(() -> {
             try {
                 mService.onConnectEvent(netId, error, latencyMs, ipAddr, 80, 1);
@@ -481,6 +490,7 @@ public class NetdEventListenerServiceTest {
     }
 
     void dnsEvent(int netId, int type, int result, int latency) throws Exception {
+        setCapabilities(netId);
         mService.onDnsEvent(netId, type, result, latency, "", null, 0, 0);
     }