fix #176

src/main/AndroidManifest.xml

@@ -1,7 +1,7 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.github.shadowsocks"
-    android:versionCode="91"
-    android:versionName="2.5.3">
+    android:versionCode="93"
+    android:versionName="2.5.4">
 
   <uses-permission android:name="android.permission.INTERNET"/>
   <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

src/main/scala/com/github/shadowsocks/ShadowsocksVpnService.scala

@@ -187,6 +187,9 @@ class ShadowsocksVpnService extends VpnService with BaseService {
       .addDnsServer("8.8.8.8")
 
     if (Utils.isLollipopOrAbove) {
+
+      builder.allowFamily(android.system.OsConstants.AF_INET6)
+
       if (!config.isGlobalProxy) {
         val apps = AppManager.getProxiedApps(this, config.proxiedAppString)
         val pkgSet: mutable.HashSet[String] = new mutable.HashSet[String]