Add a config to set Dun capabilities.

Since CDMA doesn't use APN settings there was no place to say what a cdma
device's DUN connection would support, so by default normal device
originating traffic would be blocked on a tethering single-connection device.

With this change you can (via overlay) say that it supports everything
so mms and on-device browsing/email will still work even when on a dun connection.

The reason to allow both: some carriers will charge per byte for dun access
and so they don't want lots of non-tethering traffic used (costs the user alot)
but other carriers just use a dun connection to limit access to tethering, but
once there give unlimited data, so it makes sense to support everything there.

bug:5972599
Change-Id: I78fd7f3ac63c51a0560b659ed5ec219b10a93f8d

Author: Robert Greenwalt

core/res/res/values/config.xml

@@ -227,6 +227,13 @@
         <item>4</item>
     </integer-array>
 
+    <!-- If the DUN connection for this CDMA device supports more than just DUN -->
+    <!-- traffic you should list them here. -->
+    <!-- If this device is not CDMA this is ignored.  If this list is empty on -->
+    <!-- a DUN-requiring CDMA device, the DUN APN will just support just DUN. -->
+    <string-array translatable="false" name="config_cdma_dun_supported_types">
+    </string-array>
+
     <!-- String containing the apn value for tethering.  May be overriden by secure settings
          TETHER_DUN_APN.  Value is a comma separated series of strings:
          "name,apn,proxy,port,username,password,server,mmsc,mmsproxy,mmsport,mcc,mnc,auth,type"

telephony/java/com/android/internal/telephony/cdma/CdmaDataConnectionTracker.java

@@ -93,6 +93,9 @@ public final class CdmaDataConnectionTracker extends DataConnectionTracker {
             Phone.APN_TYPE_MMS,
             Phone.APN_TYPE_HIPRI };
 
+    private String[] mDunApnTypes = {
+            Phone.APN_TYPE_DUN };
+
     private static final int mDefaultApnId = DataConnectionTracker.APN_DEFAULT_ID;
 
     /* Constructor */
@@ -118,6 +121,21 @@ public final class CdmaDataConnectionTracker extends DataConnectionTracker {
 
         createAllDataConnectionList();
         broadcastMessenger();
+
+        Context c = mCdmaPhone.getContext();
+        String[] t = c.getResources().getStringArray(
+                com.android.internal.R.array.config_cdma_dun_supported_types);
+        if (t != null && t.length > 0) {
+            ArrayList<String> temp = new ArrayList<String>();
+            for(int i=0; i< t.length; i++) {
+                if (!Phone.APN_TYPE_DUN.equalsIgnoreCase(t[i])) {
+                    temp.add(t[i]);
+                }
+            }
+            temp.add(0, Phone.APN_TYPE_DUN);
+            mDunApnTypes = temp.toArray(t);
+        }
+
     }
 
     @Override
@@ -343,8 +361,7 @@ private boolean setupData(String reason) {
         String[] types;
         int apnId;
         if (mRequestedApnType.equals(Phone.APN_TYPE_DUN)) {
-            types = new String[1];
-            types[0] = Phone.APN_TYPE_DUN;
+            types = mDunApnTypes;
             apnId = DataConnectionTracker.APN_DUN_ID;
         } else {
             types = mDefaultApnTypes;