add UI to enable experimental kcp transport if the client uses obfsvpn instead of shapeshifter and the provider supports the kcp variant

3 files changed, 53 insertions, 4 deletions

diff --git a/app/src/main/java/se/leap/bitmaskclient/base/fragments/SettingsFragment.java b/app/src/main/java/se/leap/bitmaskclient/base/fragments/SettingsFragment.java
index f4531ff8..94f737b4 100644
--- a/app/src/main/java/se/leap/bitmaskclient/base/fragments/SettingsFragment.java
+++ b/app/src/main/java/se/leap/bitmaskclient/base/fragments/SettingsFragment.java
@@ -9,12 +9,15 @@ import static se.leap.bitmaskclient.base.models.Constants.PREFER_UDP;
 import static se.leap.bitmaskclient.base.models.Constants.SHARED_PREFERENCES;
 import static se.leap.bitmaskclient.base.models.Constants.USE_BRIDGES;
 import static se.leap.bitmaskclient.base.models.Constants.USE_IPv6_FIREWALL;
+import static se.leap.bitmaskclient.base.utils.ConfigHelper.ObfsVpnHelper.useObfsVpn;
+import static se.leap.bitmaskclient.base.utils.PreferenceHelper.allowExperimentalTransports;
 import static se.leap.bitmaskclient.base.utils.PreferenceHelper.getPreferUDP;
 import static se.leap.bitmaskclient.base.utils.PreferenceHelper.getShowAlwaysOnDialog;
 import static se.leap.bitmaskclient.base.utils.PreferenceHelper.getUseBridges;
 import static se.leap.bitmaskclient.base.utils.PreferenceHelper.getUseSnowflake;
 import static se.leap.bitmaskclient.base.utils.PreferenceHelper.hasSnowflakePrefs;
 import static se.leap.bitmaskclient.base.utils.PreferenceHelper.preferUDP;
+import static se.leap.bitmaskclient.base.utils.PreferenceHelper.setAllowExperimentalTransports;
 import static se.leap.bitmaskclient.base.utils.PreferenceHelper.useBridges;
 import static se.leap.bitmaskclient.base.utils.PreferenceHelper.useSnowflake;
 import static se.leap.bitmaskclient.base.utils.ViewHelper.setActionBarTitle;
@@ -81,6 +84,7 @@ public class SettingsFragment extends Fragment implements SharedPreferences.OnSh
         initFirewallEntry(view);
         initTetheringEntry(view);
         initGatewayPinningEntry(view);
+        initExperimentalTransportsEntry(view);
         setActionBarTitle(this, advanced_settings);
         return view;
     }
@@ -249,6 +253,23 @@ public class SettingsFragment extends Fragment implements SharedPreferences.OnSh
         });
     }
 
+    public void initExperimentalTransportsEntry(View rootView) {
+        IconSwitchEntry experimentalTransports = rootView.findViewById(R.id.experimental_transports);
+        if (useObfsVpn() && ProviderObservable.getInstance().getCurrentProvider().supportsExperimentalPluggableTransports()) {
+            experimentalTransports.setVisibility(VISIBLE);
+            experimentalTransports.setChecked(allowExperimentalTransports(this.getContext()));
+            experimentalTransports.setOnCheckedChangeListener((buttonView, isChecked) -> {
+                if (!buttonView.isPressed()) {
+                    return;
+                }
+                setAllowExperimentalTransports(getContext(), isChecked);
+            });
+        } else {
+            experimentalTransports.setVisibility(GONE);
+        }
+
+    }
+
     public void showTetheringAlert() {
         try {
 
diff --git a/app/src/main/java/se/leap/bitmaskclient/base/models/Provider.java b/app/src/main/java/se/leap/bitmaskclient/base/models/Provider.java
index 02a9694a..7b8f22af 100644
--- a/app/src/main/java/se/leap/bitmaskclient/base/models/Provider.java
+++ b/app/src/main/java/se/leap/bitmaskclient/base/models/Provider.java
@@ -30,6 +30,7 @@ import java.net.URL;
 import java.util.Locale;
 
 import static de.blinkt.openvpn.core.connection.Connection.TransportType.OBFS4;
+import static de.blinkt.openvpn.core.connection.Connection.TransportType.OBFS4_KCP;
 import static se.leap.bitmaskclient.base.models.Constants.CAPABILITIES;
 import static se.leap.bitmaskclient.base.models.Constants.GATEWAYS;
 import static se.leap.bitmaskclient.base.models.Constants.LOCATIONS;
@@ -37,8 +38,12 @@ import static se.leap.bitmaskclient.base.models.Constants.PROVIDER_ALLOWED_REGIS
 import static se.leap.bitmaskclient.base.models.Constants.PROVIDER_ALLOW_ANONYMOUS;
 import static se.leap.bitmaskclient.base.models.Constants.TRANSPORT;
 import static se.leap.bitmaskclient.base.models.Constants.TYPE;
+import static se.leap.bitmaskclient.base.utils.ConfigHelper.ObfsVpnHelper.useObfsVpn;
 import static se.leap.bitmaskclient.providersetup.ProviderAPI.ERRORS;
 
+import de.blinkt.openvpn.core.connection.Connection;
+import de.blinkt.openvpn.core.connection.Connection.TransportType;
+
 /**
  * @author Sean Leonard <meanderingcode@aetherislands.net>
  * @author Parménides GV <parmegv@sdf.org>
@@ -161,6 +166,17 @@ public final class Provider implements Parcelable {
     }
 
     public boolean supportsPluggableTransports() {
+        if (useObfsVpn()) {
+            return supportsTransports(new TransportType[]{OBFS4, OBFS4_KCP});
+        }
+        return supportsTransports(new TransportType[]{OBFS4});
+    }
+
+    public boolean supportsExperimentalPluggableTransports() {
+        return supportsTransports(new TransportType[]{OBFS4_KCP});
+    }
+
+    private boolean supportsTransports(TransportType[] transportTypes) {
         try {
             JSONArray gatewayJsons = eipServiceJson.getJSONArray(GATEWAYS);
             for (int i = 0; i < gatewayJsons.length(); i++) {
@@ -168,15 +184,18 @@ public final class Provider implements Parcelable {
                         getJSONObject(CAPABILITIES).
                         getJSONArray(TRANSPORT);
                 for (int j = 0; j < transports.length(); j++) {
-                    if (OBFS4.toString().equals(transports.getJSONObject(j).getString(TYPE))) {
-                        return true;
+                    String supportedTransportType = transports.getJSONObject(j).getString(TYPE);
+                    for (TransportType transportType : transportTypes) {
+                        if (transportType.toString().equals(supportedTransportType)) {
+                            return true;
+                        }
                     }
                 }
             }
         } catch (Exception e) {
-           // ignore
+            // ignore
         }
-       return false;
+        return false;
     }
 
     public String getIpForHostname(String host) {
diff --git a/app/src/main/res/layout/f_settings.xml b/app/src/main/res/layout/f_settings.xml
index 7b8733cd..f89dc956 100644
--- a/app/src/main/res/layout/f_settings.xml
+++ b/app/src/main/res/layout/f_settings.xml
@@ -114,5 +114,14 @@
             app:subtitle="Connect to a specific Gateway for debugging purposes"
             />
 
+        <se.leap.bitmaskclient.base.views.IconSwitchEntry
+            android:id="@+id/experimental_transports"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            app:text="Experimental transports"
+            app:singleLine="false"
+            app:subtitle="These transports might circumvent censorship, but are still in a testing phase"
+            />
+
     </LinearLayout>
 </ScrollView>
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