use IPv6 routing API then fallback to Lollipop

1) Utilize the hidden API requestRouteToHostAddress that takes an
   InetAddress (IPv6-capable) instead of a forced IPv4 integer-
   encoded address. Will fallback to the IPv4 one if reflection
   fails for whatever reason.

2) If on Lollipop and our manual MMS code doesn't work, will try
   to use the Lollipop API and give it 60 seconds instead of 30,
   since I did run into the timeout not being long enough in
   certain conditions and I'm thinking maybe it just wasn't long
   enough for some carriers.

Closes #3105
// FREEBIE

src/org/thoughtcrime/securesms/jobs/MmsDownloadJob.java

@@ -12,6 +12,7 @@ import org.thoughtcrime.securesms.database.DatabaseFactory;
 import org.thoughtcrime.securesms.database.MmsDatabase;
 import org.thoughtcrime.securesms.jobs.requirements.MasterSecretRequirement;
 import org.thoughtcrime.securesms.mms.ApnUnavailableException;
+import org.thoughtcrime.securesms.mms.CompatMmsConnection;
 import org.thoughtcrime.securesms.mms.IncomingLollipopMmsConnection;
 import org.thoughtcrime.securesms.mms.IncomingMediaMessage;
 import org.thoughtcrime.securesms.mms.IncomingLegacyMmsConnection;
@@ -89,7 +90,7 @@ public class MmsDownloadJob extends MasterSecretJob {
 
       Log.w(TAG, "Downloading mms at " + Uri.parse(contentLocation).getHost());
 
-      RetrieveConf retrieveConf = getMmsConnection(context).retrieve(contentLocation, transactionId);
+      RetrieveConf retrieveConf = new CompatMmsConnection(context).retrieve(contentLocation, transactionId);
       if (retrieveConf == null) {
         throw new MmsException("RetrieveConf was null");
       }
@@ -123,16 +124,6 @@ public class MmsDownloadJob extends MasterSecretJob {
     }
   }
 
-  private IncomingMmsConnection getMmsConnection(Context context)
-      throws ApnUnavailableException
-  {
-    if (VERSION.SDK_INT >= VERSION_CODES.LOLLIPOP) {
-      return new IncomingLollipopMmsConnection(context);
-    } else {
-      return new IncomingLegacyMmsConnection(context);
-    }
-  }
-
   @Override
   public void onCanceled() {
     MmsDatabase database = DatabaseFactory.getMmsDatabase(context);

src/org/thoughtcrime/securesms/jobs/MmsSendJob.java

@@ -11,6 +11,7 @@ import org.thoughtcrime.securesms.database.MmsDatabase;
 import org.thoughtcrime.securesms.database.NoSuchMessageException;
 import org.thoughtcrime.securesms.jobs.requirements.MasterSecretRequirement;
 import org.thoughtcrime.securesms.mms.ApnUnavailableException;
+import org.thoughtcrime.securesms.mms.CompatMmsConnection;
 import org.thoughtcrime.securesms.mms.MediaConstraints;
 import org.thoughtcrime.securesms.mms.MmsSendResult;
 import org.thoughtcrime.securesms.mms.OutgoingLegacyMmsConnection;
@@ -68,11 +69,11 @@ public class MmsSendJob extends SendJob {
       validateDestinations(message);
 
       final byte[]        pduBytes = getPduBytes(masterSecret, message);
-      final SendConf      sendConf = getMmsConnection(context).send(pduBytes);
+      final SendConf      sendConf = new CompatMmsConnection(context).send(pduBytes);
       final MmsSendResult result   = getSendResult(sendConf, message);
 
       database.markAsSent(messageId, result.getMessageId(), result.getResponseStatus());
-    } catch (UndeliverableMessageException | IOException | ApnUnavailableException e) {
+    } catch (UndeliverableMessageException | IOException e) {
       Log.w(TAG, e);
       database.markAsSentFailed(messageId);
       notifyMediaMessageDeliveryFailed(context, messageId);
@@ -94,16 +95,6 @@ public class MmsSendJob extends SendJob {
     notifyMediaMessageDeliveryFailed(context, messageId);
   }
 
-  private OutgoingMmsConnection getMmsConnection(Context context)
-      throws ApnUnavailableException
-  {
-    if (VERSION.SDK_INT >= VERSION_CODES.LOLLIPOP) {
-      return new OutgoingLollipopMmsConnection(context);
-    } else {
-      return new OutgoingLegacyMmsConnection(context);
-    }
-  }
-
   private byte[] getPduBytes(MasterSecret masterSecret, SendReq message)
       throws IOException, UndeliverableMessageException, InsecureFallbackApprovalException
   {

src/org/thoughtcrime/securesms/mms/CompatMmsConnection.java

@@ -0,0 +1,66 @@
+package org.thoughtcrime.securesms.mms;
+
+import android.content.Context;
+import android.net.ConnectivityManager;
+import android.net.NetworkInfo;
+import android.os.Build.VERSION;
+import android.os.Build.VERSION_CODES;
+import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
+import android.util.Log;
+
+import org.thoughtcrime.securesms.transport.UndeliverableMessageException;
+
+import java.io.IOException;
+import java.net.Inet6Address;
+import java.net.InterfaceAddress;
+import java.net.NetworkInterface;
+import java.net.SocketException;
+import java.util.Enumeration;
+
+import ws.com.google.android.mms.MmsException;
+import ws.com.google.android.mms.pdu.RetrieveConf;
+import ws.com.google.android.mms.pdu.SendConf;
+
+public class CompatMmsConnection implements OutgoingMmsConnection, IncomingMmsConnection {
+  private static final String TAG = CompatMmsConnection.class.getSimpleName();
+
+  private Context context;
+
+  public CompatMmsConnection(Context context) {
+    this.context = context;
+  }
+
+  @Nullable @Override public SendConf send(@NonNull byte[] pduBytes)
+      throws UndeliverableMessageException
+  {
+    try {
+      Log.w(TAG, "Sending via legacy connection");
+      return new OutgoingLegacyMmsConnection(context).send(pduBytes);
+    } catch (UndeliverableMessageException | ApnUnavailableException e) {
+      if (VERSION.SDK_INT >= VERSION_CODES.LOLLIPOP) {
+        Log.w(TAG, "Falling back to try sending via Lollipop API");
+        return new OutgoingLollipopMmsConnection(context).send(pduBytes);
+      } else {
+        throw new UndeliverableMessageException(e);
+      }
+    }
+  }
+
+  @Nullable @Override public RetrieveConf retrieve(@NonNull String contentLocation,
+                                                   byte[] transactionId)
+      throws MmsException, MmsRadioException, ApnUnavailableException, IOException
+  {
+    try {
+      Log.w(TAG, "Receiving via legacy connection");
+      return new IncomingLegacyMmsConnection(context).retrieve(contentLocation, transactionId);
+    } catch (MmsRadioException | IOException | ApnUnavailableException e) {
+      if (VERSION.SDK_INT >= VERSION_CODES.LOLLIPOP) {
+        Log.w(TAG, "Falling back to try receiving via Lollipop API");
+        return new IncomingLollipopMmsConnection(context).retrieve(contentLocation, transactionId);
+      } else {
+        throw e;
+      }
+    }
+  }
+}

src/org/thoughtcrime/securesms/mms/IncomingLegacyMmsConnection.java

@@ -104,13 +104,9 @@ public class IncomingLegacyMmsConnection extends LegacyMmsConnection implements
     final String  targetHost = useProxy
                              ? contentApn.getProxy()
                              : Uri.parse(contentApn.getMmsc()).getHost();
-    try {
+    if (checkRouteToHost(context, targetHost, usingMmsRadio)) {
-      if (checkRouteToHost(context, targetHost, usingMmsRadio)) {
+      Log.w(TAG, "got successful route to host " + targetHost);
-        Log.w(TAG, "got successful route to host " + targetHost);
+      pdu = execute(constructRequest(contentApn, useProxy));
-        pdu = execute(constructRequest(contentApn, useProxy));
-      }
-    } catch (IOException ioe) {
-      Log.w(TAG, ioe);
     }
 
     if (pdu == null) {

src/org/thoughtcrime/securesms/mms/LegacyMmsConnection.java

@@ -18,6 +18,7 @@ package org.thoughtcrime.securesms.mms;
 
 import android.content.Context;
 import android.net.ConnectivityManager;
+import android.net.NetworkInfo;
 import android.telephony.TelephonyManager;
 import android.text.TextUtils;
 import android.util.Log;
@@ -47,6 +48,8 @@ import java.io.BufferedInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
 import java.net.InetAddress;
 import java.net.URL;
 import java.util.LinkedList;
@@ -57,7 +60,7 @@ public abstract class LegacyMmsConnection {
 
   public static final String USER_AGENT = "Android-Mms/2.0";
 
-  private static final String TAG = "MmsCommunication";
+  private static final String TAG = LegacyMmsConnection.class.getSimpleName();
 
   protected final Context context;
   protected final Apn     apn;
@@ -88,6 +91,7 @@ public abstract class LegacyMmsConnection {
     return ((TelephonyManager)context.getSystemService(Context.TELEPHONY_SERVICE)).getPhoneType() == TelephonyManager.PHONE_TYPE_CDMA;
   }
 
+  @SuppressWarnings("TryWithIdenticalCatches")
   protected static boolean checkRouteToHost(Context context, String host, boolean usingMmsRadio)
       throws IOException
   {
@@ -105,16 +109,29 @@ public abstract class LegacyMmsConnection {
     }
 
     byte[] ipAddressBytes = inetAddress.getAddress();
-    if (ipAddressBytes == null || ipAddressBytes.length != 4) {
+    if (ipAddressBytes == null) {
-      Log.w(TAG, "returning vacuous success since android.net package doesn't support IPv6");
+      Log.w(TAG, "resolved IP address bytes are null, returning true to attempt a connection anyway.");
       return true;
     }
 
     Log.w(TAG, "Checking route to address: " + host + ", " + inetAddress.getHostAddress());
     ConnectivityManager manager = (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);
-    int     ipAddress           = Conversions.byteArrayToIntLittleEndian(ipAddressBytes, 0);
+    try {
-    boolean routeToHostObtained = manager.requestRouteToHost(MmsRadio.TYPE_MOBILE_MMS, ipAddress);
+      final Method  requestRouteMethod  = manager.getClass().getMethod("requestRouteToHostAddress", Integer.TYPE, InetAddress.class);
-    Log.w(TAG, "requestRouteToHost result: " + routeToHostObtained);
+      final boolean routeToHostObtained = (Boolean) requestRouteMethod.invoke(manager, MmsRadio.TYPE_MOBILE_MMS, inetAddress);
+      Log.w(TAG, "requestRouteToHostAddress(" + inetAddress + ") -> " + routeToHostObtained);
+      return routeToHostObtained;
+    } catch (NoSuchMethodException nsme) {
+      Log.w(TAG, nsme);
+    } catch (IllegalAccessException iae) {
+      Log.w(TAG, iae);
+    } catch (InvocationTargetException ite) {
+      Log.w(TAG, ite);
+    }
+
+    final int     ipAddress           = Conversions.byteArrayToIntLittleEndian(ipAddressBytes, 0);
+    final boolean routeToHostObtained = manager.requestRouteToHost(MmsRadio.TYPE_MOBILE_MMS, ipAddress);
+    Log.w(TAG, "requestRouteToHost(" + ipAddress + ") -> " + routeToHostObtained);
     return routeToHostObtained;
   }
 
@@ -188,8 +205,6 @@ public abstract class LegacyMmsConnection {
         add(new BasicHeader("X-MDN", number));
       }
     }};
-
-
   }
 
   public static class Apn {

src/org/thoughtcrime/securesms/mms/LollipopMmsConnection.java

@@ -67,7 +67,7 @@ public abstract class LollipopMmsConnection extends BroadcastReceiver {
   }
 
   protected void waitForResult() throws TimeoutException {
-    long timeoutExpiration = System.currentTimeMillis() + 30000;
+    long timeoutExpiration = System.currentTimeMillis() + 60000;
     while (!resultAvailable) {
       Util.wait(this, Math.max(1, timeoutExpiration - System.currentTimeMillis()));
       if (System.currentTimeMillis() >= timeoutExpiration) {