Use return values from JNI functions binding sockets and processes to networks.

bug:15757549
Change-Id: If23b14febc923b9a0348f0cf9029fd4bf6e8d725

core/java/android/net/ConnectivityManager.java

@@ -2372,12 +2372,10 @@ public class ConnectivityManager {
      */
     public static boolean setProcessDefaultNetwork(Network network) {
         if (network == null) {
-            NetworkUtils.unbindProcessToNetwork();
+            return NetworkUtils.unbindProcessToNetwork();
         } else {
-            NetworkUtils.bindProcessToNetwork(network.netId);
+            return NetworkUtils.bindProcessToNetwork(network.netId);
         }
-        // TODO fix return value
-        return true;
     }
 
     /**
@@ -2404,11 +2402,9 @@ public class ConnectivityManager {
      */
     public static boolean setProcessDefaultNetworkForHostResolution(Network network) {
         if (network == null) {
-            NetworkUtils.unbindProcessToNetworkForHostResolution();
+            return NetworkUtils.unbindProcessToNetworkForHostResolution();
         } else {
-            NetworkUtils.bindProcessToNetworkForHostResolution(network.netId);
+            return NetworkUtils.bindProcessToNetworkForHostResolution(network.netId);
         }
-        // TODO hook up the return value.
-        return true;
     }
 }

core/java/android/net/Network.java

@@ -24,6 +24,7 @@ import java.io.IOException;
 import java.net.InetAddress;
 import java.net.InetSocketAddress;
 import java.net.Socket;
+import java.net.SocketException;
 import java.net.UnknownHostException;
 import javax.net.SocketFactory;
 
@@ -148,7 +149,9 @@ public class Network implements Parcelable {
             // Query a property of the underlying socket to ensure the underlying
             // socket exists so a file descriptor is available to bind to a network.
             socket.getReuseAddress();
-            NetworkUtils.bindSocketToNetwork(socket.getFileDescriptor$().getInt$(), mNetId);
+            if (!NetworkUtils.bindSocketToNetwork(socket.getFileDescriptor$().getInt$(), mNetId)) {
+                throw new SocketException("Failed to bind socket to network.");
+            }
             return socket;
         }
     }

core/java/android/net/NetworkUtils.java

@@ -118,13 +118,13 @@ public class NetworkUtils {
      * is by design so an application doesn't accidentally use sockets it thinks are still bound to
      * a particular {@code Network}.
      */
-    public native static void bindProcessToNetwork(int netId);
+    public native static boolean bindProcessToNetwork(int netId);
 
     /**
      * Clear any process specific {@code Network} binding.  This reverts a call to
      * {@link #bindProcessToNetwork}.
      */
-    public native static void unbindProcessToNetwork();
+    public native static boolean unbindProcessToNetwork();
 
     /**
      * Return the netId last passed to {@link #bindProcessToNetwork}, or NETID_UNSET if
@@ -138,7 +138,7 @@ public class NetworkUtils {
      *
      * @deprecated This is strictly for legacy usage to support startUsingNetworkFeature().
      */
-    public native static void bindProcessToNetworkForHostResolution(int netId);
+    public native static boolean bindProcessToNetworkForHostResolution(int netId);
 
     /**
      * Clears any process specific {@link Network} binding for host resolution.  This does
@@ -146,13 +146,13 @@ public class NetworkUtils {
      *
      * @deprecated This is strictly for legacy usage to support startUsingNetworkFeature().
      */
-    public native static void unbindProcessToNetworkForHostResolution();
+    public native static boolean unbindProcessToNetworkForHostResolution();
 
     /**
      * Explicitly binds {@code socketfd} to the network designated by {@code netId}.  This
      * overrides any binding via {@link #bindProcessToNetwork}.
      */
-    public native static void bindSocketToNetwork(int socketfd, int netId);
+    public native static boolean bindSocketToNetwork(int socketfd, int netId);
 
     /**
      * Convert a IPv4 address from an integer to an InetAddress.