Merge "Always allow Ethernet to be an upstream"

services/core/java/com/android/server/connectivity/tethering/TetheringConfiguration.java

@@ -17,6 +17,7 @@
 package com.android.server.connectivity.tethering;
 
 import static android.content.Context.TELEPHONY_SERVICE;
+import static android.net.ConnectivityManager.TYPE_ETHERNET;
 import static android.net.ConnectivityManager.TYPE_MOBILE;
 import static android.net.ConnectivityManager.TYPE_MOBILE_DUN;
 import static android.net.ConnectivityManager.TYPE_MOBILE_HIPRI;
@@ -208,29 +209,26 @@ public class TetheringConfiguration {
         // *always* an upstream, regardless of the upstream interface types
         // specified by configuration resources.
         if (dunCheck == DUN_REQUIRED) {
-            if (!upstreamIfaceTypes.contains(TYPE_MOBILE_DUN)) {
+            appendIfNotPresent(upstreamIfaceTypes, TYPE_MOBILE_DUN);
-                upstreamIfaceTypes.add(TYPE_MOBILE_DUN);
-            }
         } else if (dunCheck == DUN_NOT_REQUIRED) {
-            if (!upstreamIfaceTypes.contains(TYPE_MOBILE)) {
+            appendIfNotPresent(upstreamIfaceTypes, TYPE_MOBILE);
-                upstreamIfaceTypes.add(TYPE_MOBILE);
+            appendIfNotPresent(upstreamIfaceTypes, TYPE_MOBILE_HIPRI);
-            }
-            if (!upstreamIfaceTypes.contains(TYPE_MOBILE_HIPRI)) {
-                upstreamIfaceTypes.add(TYPE_MOBILE_HIPRI);
-            }
         } else {
             // Fix upstream interface types for case DUN_UNSPECIFIED.
             // Do not modify if a cellular interface type is already present in the
             // upstream interface types. Add TYPE_MOBILE and TYPE_MOBILE_HIPRI if no
             // cellular interface types are found in the upstream interface types.
-            if (!(upstreamIfaceTypes.contains(TYPE_MOBILE_DUN)
+            if (!(containsOneOf(upstreamIfaceTypes,
-                    || upstreamIfaceTypes.contains(TYPE_MOBILE)
+                    TYPE_MOBILE_DUN, TYPE_MOBILE, TYPE_MOBILE_HIPRI))) {
-                    || upstreamIfaceTypes.contains(TYPE_MOBILE_HIPRI))) {
                 upstreamIfaceTypes.add(TYPE_MOBILE);
                 upstreamIfaceTypes.add(TYPE_MOBILE_HIPRI);
             }
         }
 
+        // Always make sure our good friend Ethernet is present.
+        // TODO: consider unilaterally forcing this at the front.
+        prependIfNotPresent(upstreamIfaceTypes, TYPE_ETHERNET);
+
         return upstreamIfaceTypes;
     }
 
@@ -253,4 +251,21 @@ public class TetheringConfiguration {
     private static String[] copy(String[] strarray) {
         return Arrays.copyOf(strarray, strarray.length);
     }
+
+    private static void prependIfNotPresent(ArrayList<Integer> list, int value) {
+        if (list.contains(value)) return;
+        list.add(0, value);
+    }
+
+    private static void appendIfNotPresent(ArrayList<Integer> list, int value) {
+        if (list.contains(value)) return;
+        list.add(value);
+    }
+
+    private static boolean containsOneOf(ArrayList<Integer> list, Integer... values) {
+        for (Integer value : values) {
+            if (list.contains(value)) return true;
+        }
+        return false;
+    }
 }

tests/net/java/com/android/server/connectivity/tethering/TetheringConfigurationTest.java

@@ -16,6 +16,7 @@
 
 package com.android.server.connectivity.tethering;
 
+import static android.net.ConnectivityManager.TYPE_ETHERNET;
 import static android.net.ConnectivityManager.TYPE_MOBILE;
 import static android.net.ConnectivityManager.TYPE_MOBILE_DUN;
 import static android.net.ConnectivityManager.TYPE_MOBILE_HIPRI;
@@ -38,6 +39,8 @@ import android.telephony.TelephonyManager;
 
 import com.android.internal.util.test.BroadcastInterceptingContext;
 
+import java.util.Iterator;
+
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -134,4 +137,61 @@ public class TetheringConfigurationTest {
         assertFalse(cfg.preferredUpstreamIfaceTypes.contains(TYPE_MOBILE));
         assertFalse(cfg.preferredUpstreamIfaceTypes.contains(TYPE_MOBILE_HIPRI));
     }
+
+    @Test
+    public void testNoDefinedUpstreamTypesAddsEthernet() {
+        when(mResources.getIntArray(com.android.internal.R.array.config_tether_upstream_types))
+                .thenReturn(new int[]{});
+        mHasTelephonyManager = false;
+        when(mTelephonyManager.getTetherApnRequired()).thenReturn(DUN_UNSPECIFIED);
+
+        final TetheringConfiguration cfg = new TetheringConfiguration(mMockContext, mLog);
+        final Iterator<Integer> upstreamIterator = cfg.preferredUpstreamIfaceTypes.iterator();
+        assertTrue(upstreamIterator.hasNext());
+        assertEquals(TYPE_ETHERNET, upstreamIterator.next().intValue());
+        // The following is because the code always adds some kind of mobile
+        // upstream, be it DUN or, in this case where we use DUN_UNSPECIFIED,
+        // both vanilla and hipri mobile types.
+        assertTrue(upstreamIterator.hasNext());
+        assertEquals(TYPE_MOBILE, upstreamIterator.next().intValue());
+        assertTrue(upstreamIterator.hasNext());
+        assertEquals(TYPE_MOBILE_HIPRI, upstreamIterator.next().intValue());
+        assertFalse(upstreamIterator.hasNext());
+    }
+
+    @Test
+    public void testDefinedUpstreamTypesSansEthernetAddsEthernet() {
+        when(mResources.getIntArray(com.android.internal.R.array.config_tether_upstream_types))
+                .thenReturn(new int[]{TYPE_WIFI, TYPE_MOBILE_HIPRI});
+        mHasTelephonyManager = false;
+        when(mTelephonyManager.getTetherApnRequired()).thenReturn(DUN_UNSPECIFIED);
+
+        final TetheringConfiguration cfg = new TetheringConfiguration(mMockContext, mLog);
+        final Iterator<Integer> upstreamIterator = cfg.preferredUpstreamIfaceTypes.iterator();
+        assertTrue(upstreamIterator.hasNext());
+        assertEquals(TYPE_ETHERNET, upstreamIterator.next().intValue());
+        assertTrue(upstreamIterator.hasNext());
+        assertEquals(TYPE_WIFI, upstreamIterator.next().intValue());
+        assertTrue(upstreamIterator.hasNext());
+        assertEquals(TYPE_MOBILE_HIPRI, upstreamIterator.next().intValue());
+        assertFalse(upstreamIterator.hasNext());
+    }
+
+    @Test
+    public void testDefinedUpstreamTypesWithEthernetDoesNotAddEthernet() {
+        when(mResources.getIntArray(com.android.internal.R.array.config_tether_upstream_types))
+                .thenReturn(new int[]{TYPE_WIFI, TYPE_ETHERNET, TYPE_MOBILE_HIPRI});
+        mHasTelephonyManager = false;
+        when(mTelephonyManager.getTetherApnRequired()).thenReturn(DUN_UNSPECIFIED);
+
+        final TetheringConfiguration cfg = new TetheringConfiguration(mMockContext, mLog);
+        final Iterator<Integer> upstreamIterator = cfg.preferredUpstreamIfaceTypes.iterator();
+        assertTrue(upstreamIterator.hasNext());
+        assertEquals(TYPE_WIFI, upstreamIterator.next().intValue());
+        assertTrue(upstreamIterator.hasNext());
+        assertEquals(TYPE_ETHERNET, upstreamIterator.next().intValue());
+        assertTrue(upstreamIterator.hasNext());
+        assertEquals(TYPE_MOBILE_HIPRI, upstreamIterator.next().intValue());
+        assertFalse(upstreamIterator.hasNext());
+    }
 }