updateNetwork(): Avoid NPE for null Network object.

- On cross SIM enable or LinkProperties update, use Objects.equals()
support null Network objects.
- Network objects may be null if device has just booted up or Network is
  of ETHERNET type.

Fix: 283177975, 282913671
Test: New UTs in IwlanDataServiceTest. Live test for fix.

Change-Id: Ife81fd507ee32c4083e7950ed46681a21c816696
Merged-In: Ife81fd507ee32c4083e7950ed46681a21c816696

2 files changed, 28 insertions, 2 deletions

diff --git a/src/com/google/android/iwlan/IwlanDataService.java b/src/com/google/android/iwlan/IwlanDataService.java
index 239713d..0d564ab 100644
--- a/src/com/google/android/iwlan/IwlanDataService.java
+++ b/src/com/google/android/iwlan/IwlanDataService.java
@@ -81,6 +81,7 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.LongSummaryStatistics;
 import java.util.Map;
+import java.util.Objects;
 import java.util.concurrent.ConcurrentHashMap;
 
 public class IwlanDataService extends DataService {
@@ -956,14 +957,14 @@ public class IwlanDataService extends DataService {
         }
 
         private void updateNetwork(
-                @NonNull Network network, @Nullable LinkProperties linkProperties) {
+                @Nullable Network network, @Nullable LinkProperties linkProperties) {
             if (mIwlanDataService.isNetworkConnected(
                     isActiveDataOnOtherSub(getSlotIndex()),
                     IwlanHelper.isCrossSimCallingEnabled(mContext, getSlotIndex()))) {
                 getTunnelManager().updateNetwork(network, linkProperties);
             }
 
-            if (network.equals(sNetwork)) {
+            if (Objects.equals(network, sNetwork)) {
                 return;
             }
             for (Map.Entry<String, TunnelState> entry : mTunnelStateForApn.entrySet()) {
diff --git a/test/com/google/android/iwlan/IwlanDataServiceTest.java b/test/com/google/android/iwlan/IwlanDataServiceTest.java
index 6862c97..c4549df 100644
--- a/test/com/google/android/iwlan/IwlanDataServiceTest.java
+++ b/test/com/google/android/iwlan/IwlanDataServiceTest.java
@@ -17,6 +17,7 @@
 package com.google.android.iwlan;
 
 import static android.net.NetworkCapabilities.TRANSPORT_CELLULAR;
+import static android.net.NetworkCapabilities.TRANSPORT_ETHERNET;
 import static android.net.NetworkCapabilities.TRANSPORT_WIFI;
 
 import static com.android.dx.mockito.inline.extended.ExtendedMockito.mockitoSession;
@@ -535,6 +536,30 @@ public class IwlanDataServiceTest {
     }
 
     @Test
+    public void testOnCrossSimCallingEnable_doNotUpdateTunnelManagerIfNoNetwork() throws Exception {
+        when(mMockImsMmTelManager.isCrossSimCallingEnabled()).thenReturn(true);
+        mIwlanDataService
+                .mIwlanDataServiceHandler
+                .obtainMessage(
+                        IwlanEventListener.CROSS_SIM_CALLING_ENABLE_EVENT,
+                        DEFAULT_SLOT_INDEX,
+                        0 /* unused */)
+                .sendToTarget();
+        mTestLooper.dispatchAll();
+        verify(mMockEpdgTunnelManager, never())
+                .updateNetwork(any(Network.class), any(LinkProperties.class));
+    }
+
+    @Test
+    public void testOnEthernetConnection_doNotUpdateTunnelManager() throws Exception {
+        Network newNetwork = createMockNetwork(mLinkProperties);
+        onSystemDefaultNetworkConnected(
+                newNetwork, mLinkProperties, TRANSPORT_ETHERNET, DEFAULT_SUB_INDEX);
+        verify(mMockEpdgTunnelManager, never())
+                .updateNetwork(eq(newNetwork), any(LinkProperties.class));
+    }
+
+    @Test
     public void testAddDuplicateDataServiceProviderThrows() throws Exception {
         when(mMockIwlanDataServiceProvider.getSlotIndex()).thenReturn(DEFAULT_SLOT_INDEX);
         assertThrows(